diff --git a/TypeScript b/TypeScript
index c302893..a277664 160000
--- a/TypeScript
+++ b/TypeScript
@@ -1 +1 @@
-Subproject commit c302893a6201cbd822d6040b8361ad7a0ee506fa
+Subproject commit a2776648cd48d4937b076fb8b3e935d3d5fb27e1
diff --git a/bin/lib.d.ts b/bin/lib.d.ts
index 3a7f0bb..1a8b1d7 100644
--- a/bin/lib.d.ts
+++ b/bin/lib.d.ts
@@ -1,19046 +1,19168 @@
-/*! *****************************************************************************
-Copyright (c) Microsoft Corporation. All rights reserved. 
-Licensed under the Apache License, Version 2.0 (the "License"); you may not use
-this file except in compliance with the License. You may obtain a copy of the
-License at http://www.apache.org/licenses/LICENSE-2.0  
- 
-THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
-WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
-MERCHANTABLITY OR NON-INFRINGEMENT. 
- 
-See the Apache Version 2.0 License for specific language governing permissions
-and limitations under the License.
-***************************************************************************** */
-
-/// <reference no-default-lib="true"/>
-/////////////////////////////
-/// ECMAScript APIs
-/////////////////////////////
-
-declare const NaN: number;
-declare const Infinity: number;
-
-/**
-  * Evaluates JavaScript code and executes it.
-  * @param x A String value that contains valid JavaScript code.
-  */
-declare function eval(x: string): any;
-
-/**
-  * Converts A string to an integer.
-  * @param s A string to convert into a number.
-  * @param radix A value between 2 and 36 that specifies the base of the number in numString.
-  * If this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.
-  * All other strings are considered decimal.
-  */
-declare function parseInt(s: string, radix?: number): number;
-
-/**
-  * Converts a string to a floating-point number.
-  * @param string A string that contains a floating-point number.
-  */
-declare function parseFloat(string: string): number;
-
-/**
-  * Returns a Boolean value that indicates whether a value is the reserved value NaN (not a number).
-  * @param number A numeric value.
-  */
-declare function isNaN(number: number): boolean;
-
-/**
-  * Determines whether a supplied number is finite.
-  * @param number Any numeric value.
-  */
-declare function isFinite(number: number): boolean;
-
-/**
-  * Gets the unencoded version of an encoded Uniform Resource Identifier (URI).
-  * @param encodedURI A value representing an encoded URI.
-  */
-declare function decodeURI(encodedURI: string): string;
-
-/**
-  * Gets the unencoded version of an encoded component of a Uniform Resource Identifier (URI).
-  * @param encodedURIComponent A value representing an encoded URI component.
-  */
-declare function decodeURIComponent(encodedURIComponent: string): string;
-
-/**
-  * Encodes a text string as a valid Uniform Resource Identifier (URI)
-  * @param uri A value representing an encoded URI.
-  */
-declare function encodeURI(uri: string): string;
-
-/**
-  * Encodes a text string as a valid component of a Uniform Resource Identifier (URI).
-  * @param uriComponent A value representing an encoded URI component.
-  */
-declare function encodeURIComponent(uriComponent: string): string;
-
-interface PropertyDescriptor {
-    configurable?: boolean;
-    enumerable?: boolean;
-    value?: any;
-    writable?: boolean;
-    get? (): any;
-    set? (v: any): void;
-}
-
-interface PropertyDescriptorMap {
-    [s: string]: PropertyDescriptor;
-}
-
-interface Object {
-    /** The initial value of Object.prototype.constructor is the standard built-in Object constructor. */
-    constructor: Function;
-
-    /** Returns a string representation of an object. */
-    toString(): string;
-
-    /** Returns a date converted to a string using the current locale. */
-    toLocaleString(): string;
-
-    /** Returns the primitive value of the specified object. */
-    valueOf(): Object;
-
-    /**
-      * Determines whether an object has a property with the specified name.
-      * @param v A property name.
-      */
-    hasOwnProperty(v: string): boolean;
-
-    /**
-      * Determines whether an object exists in another object's prototype chain.
-      * @param v Another object whose prototype chain is to be checked.
-      */
-    isPrototypeOf(v: Object): boolean;
-
-    /**
-      * Determines whether a specified property is enumerable.
-      * @param v A property name.
-      */
-    propertyIsEnumerable(v: string): boolean;
-}
-
-interface ObjectConstructor {
-    new (value?: any): Object;
-    (): any;
-    (value: any): any;
-
-    /** A reference to the prototype for a class of objects. */
-    readonly prototype: Object;
-
-    /**
-      * Returns the prototype of an object.
-      * @param o The object that references the prototype.
-      */
-    getPrototypeOf(o: any): any;
-
-    /**
-      * Gets the own property descriptor of the specified object.
-      * An own property descriptor is one that is defined directly on the object and is not inherited from the object's prototype.
-      * @param o Object that contains the property.
-      * @param p Name of the property.
-    */
-    getOwnPropertyDescriptor(o: any, p: string): PropertyDescriptor;
-
-    /**
-      * Returns the names of the own properties of an object. The own properties of an object are those that are defined directly
-      * on that object, and are not inherited from the object's prototype. The properties of an object include both fields (objects) and functions.
-      * @param o Object that contains the own properties.
-      */
-    getOwnPropertyNames(o: any): string[];
-
-    /**
-      * Creates an object that has null prototype.
-      * @param o Object to use as a prototype. May be null
-      */
-    create(o: null): any;
-
-    /**
-      * Creates an object that has the specified prototype, and that optionally contains specified properties.
-      * @param o Object to use as a prototype. May be null
-      */
-    create<T>(o: T): T;
-
-    /**
-      * Creates an object that has the specified prototype, and that optionally contains specified properties.
-      * @param o Object to use as a prototype. May be null
-      * @param properties JavaScript object that contains one or more property descriptors.
-      */
-    create(o: any, properties: PropertyDescriptorMap): any;
-
-    /**
-      * Adds a property to an object, or modifies attributes of an existing property.
-      * @param o Object on which to add or modify the property. This can be a native JavaScript object (that is, a user-defined object or a built in object) or a DOM object.
-      * @param p The property name.
-      * @param attributes Descriptor for the property. It can be for a data property or an accessor property.
-      */
-    defineProperty(o: any, p: string, attributes: PropertyDescriptor): any;
-
-    /**
-      * Adds one or more properties to an object, and/or modifies attributes of existing properties.
-      * @param o Object on which to add or modify the properties. This can be a native JavaScript object or a DOM object.
-      * @param properties JavaScript object that contains one or more descriptor objects. Each descriptor object describes a data property or an accessor property.
-      */
-    defineProperties(o: any, properties: PropertyDescriptorMap): any;
-
-    /**
-      * Prevents the modification of attributes of existing properties, and prevents the addition of new properties.
-      * @param o Object on which to lock the attributes.
-      */
-    seal<T>(o: T): T;
-
-    /**
-      * Prevents the modification of existing property attributes and values, and prevents the addition of new properties.
-      * @param o Object on which to lock the attributes.
-      */
-    freeze<T>(o: T): T;
-
-    /**
-      * Prevents the addition of new properties to an object.
-      * @param o Object to make non-extensible.
-      */
-    preventExtensions<T>(o: T): T;
-
-    /**
-      * Returns true if existing property attributes cannot be modified in an object and new properties cannot be added to the object.
-      * @param o Object to test.
-      */
-    isSealed(o: any): boolean;
-
-    /**
-      * Returns true if existing property attributes and values cannot be modified in an object, and new properties cannot be added to the object.
-      * @param o Object to test.
-      */
-    isFrozen(o: any): boolean;
-
-    /**
-      * Returns a value that indicates whether new properties can be added to an object.
-      * @param o Object to test.
-      */
-    isExtensible(o: any): boolean;
-
-    /**
-      * Returns the names of the enumerable properties and methods of an object.
-      * @param o Object that contains the properties and methods. This can be an object that you created or an existing Document Object Model (DOM) object.
-      */
-    keys(o: any): string[];
-}
-
-/**
-  * Provides functionality common to all JavaScript objects.
-  */
-declare const Object: ObjectConstructor;
-
-/**
-  * Creates a new function.
-  */
-interface Function {
-    /**
-      * Calls the function, substituting the specified object for the this value of the function, and the specified array for the arguments of the function.
-      * @param thisArg The object to be used as the this object.
-      * @param argArray A set of arguments to be passed to the function.
-      */
-    apply(this: Function, thisArg: any, argArray?: any): any;
-
-    /**
-      * Calls a method of an object, substituting another object for the current object.
-      * @param thisArg The object to be used as the current object.
-      * @param argArray A list of arguments to be passed to the method.
-      */
-    call(this: Function, thisArg: any, ...argArray: any[]): any;
-
-    /**
-      * For a given function, creates a bound function that has the same body as the original function.
-      * The this object of the bound function is associated with the specified object, and has the specified initial parameters.
-      * @param thisArg An object to which the this keyword can refer inside the new function.
-      * @param argArray A list of arguments to be passed to the new function.
-      */
-    bind(this: Function, thisArg: any, ...argArray: any[]): any;
-
-    prototype: any;
-    readonly length: number;
-
-    // Non-standard extensions
-    arguments: any;
-    caller: Function;
-}
-
-interface FunctionConstructor {
-    /**
-      * Creates a new function.
-      * @param args A list of arguments the function accepts.
-      */
-    new (...args: string[]): Function;
-    (...args: string[]): Function;
-    readonly prototype: Function;
-}
-
-declare const Function: FunctionConstructor;
-
-interface IArguments {
-    [index: number]: any;
-    length: number;
-    callee: Function;
-}
-
-interface String {
-    /** Returns a string representation of a string. */
-    toString(): string;
-
-    /**
-      * Returns the character at the specified index.
-      * @param pos The zero-based index of the desired character.
-      */
-    charAt(pos: number): string;
-
-    /**
-      * Returns the Unicode value of the character at the specified location.
-      * @param index The zero-based index of the desired character. If there is no character at the specified index, NaN is returned.
-      */
-    charCodeAt(index: number): number;
-
-    /**
-      * Returns a string that contains the concatenation of two or more strings.
-      * @param strings The strings to append to the end of the string.
-      */
-    concat(...strings: string[]): string;
-
-    /**
-      * Returns the position of the first occurrence of a substring.
-      * @param searchString The substring to search for in the string
-      * @param position The index at which to begin searching the String object. If omitted, search starts at the beginning of the string.
-      */
-    indexOf(searchString: string, position?: number): number;
-
-    /**
-      * Returns the last occurrence of a substring in the string.
-      * @param searchString The substring to search for.
-      * @param position The index at which to begin searching. If omitted, the search begins at the end of the string.
-      */
-    lastIndexOf(searchString: string, position?: number): number;
-
-    /**
-      * Determines whether two strings are equivalent in the current locale.
-      * @param that String to compare to target string
-      */
-    localeCompare(that: string): number;
-
-    /**
-      * Matches a string with a regular expression, and returns an array containing the results of that search.
-      * @param regexp A variable name or string literal containing the regular expression pattern and flags.
-      */
-    match(regexp: string): RegExpMatchArray | null;
-
-    /**
-      * Matches a string with a regular expression, and returns an array containing the results of that search.
-      * @param regexp A regular expression object that contains the regular expression pattern and applicable flags.
-      */
-    match(regexp: RegExp): RegExpMatchArray | null;
-
-    /**
-      * Replaces text in a string, using a regular expression or search string.
-      * @param searchValue A string that represents the regular expression.
-      * @param replaceValue A string containing the text to replace for every successful match of searchValue in this string.
-      */
-    replace(searchValue: string, replaceValue: string): string;
-
-    /**
-      * Replaces text in a string, using a regular expression or search string.
-      * @param searchValue A string that represents the regular expression.
-      * @param replacer A function that returns the replacement text.
-      */
-    replace(searchValue: string, replacer: (substring: string, ...args: any[]) => string): string;
-
-    /**
-      * Replaces text in a string, using a regular expression or search string.
-      * @param searchValue A Regular Expression object containing the regular expression pattern and applicable flags.
-      * @param replaceValue A string containing the text to replace for every successful match of searchValue in this string.
-      */
-    replace(searchValue: RegExp, replaceValue: string): string;
-
-    /**
-      * Replaces text in a string, using a regular expression or search string.
-      * @param searchValue A Regular Expression object containing the regular expression pattern and applicable flags
-      * @param replacer A function that returns the replacement text.
-      */
-    replace(searchValue: RegExp, replacer: (substring: string, ...args: any[]) => string): string;
-
-    /**
-      * Finds the first substring match in a regular expression search.
-      * @param regexp The regular expression pattern and applicable flags.
-      */
-    search(regexp: string): number;
-
-    /**
-      * Finds the first substring match in a regular expression search.
-      * @param regexp The regular expression pattern and applicable flags.
-      */
-    search(regexp: RegExp): number;
-
-    /**
-      * Returns a section of a string.
-      * @param start The index to the beginning of the specified portion of stringObj.
-      * @param end The index to the end of the specified portion of stringObj. The substring includes the characters up to, but not including, the character indicated by end.
-      * If this value is not specified, the substring continues to the end of stringObj.
-      */
-    slice(start?: number, end?: number): string;
-
-    /**
-      * Split a string into substrings using the specified separator and return them as an array.
-      * @param separator A string that identifies character or characters to use in separating the string. If omitted, a single-element array containing the entire string is returned.
-      * @param limit A value used to limit the number of elements returned in the array.
-      */
-    split(separator: string, limit?: number): string[];
-
-    /**
-      * Split a string into substrings using the specified separator and return them as an array.
-      * @param separator A Regular Express that identifies character or characters to use in separating the string. If omitted, a single-element array containing the entire string is returned.
-      * @param limit A value used to limit the number of elements returned in the array.
-      */
-    split(separator: RegExp, limit?: number): string[];
-
-    /**
-      * Returns the substring at the specified location within a String object.
-      * @param start The zero-based index number indicating the beginning of the substring.
-      * @param end Zero-based index number indicating the end of the substring. The substring includes the characters up to, but not including, the character indicated by end.
-      * If end is omitted, the characters from start through the end of the original string are returned.
-      */
-    substring(start: number, end?: number): string;
-
-    /** Converts all the alphabetic characters in a string to lowercase. */
-    toLowerCase(): string;
-
-    /** Converts all alphabetic characters to lowercase, taking into account the host environment's current locale. */
-    toLocaleLowerCase(): string;
-
-    /** Converts all the alphabetic characters in a string to uppercase. */
-    toUpperCase(): string;
-
-    /** Returns a string where all alphabetic characters have been converted to uppercase, taking into account the host environment's current locale. */
-    toLocaleUpperCase(): string;
-
-    /** Removes the leading and trailing white space and line terminator characters from a string. */
-    trim(): string;
-
-    /** Returns the length of a String object. */
-    readonly length: number;
-
-    // IE extensions
-    /**
-      * Gets a substring beginning at the specified location and having the specified length.
-      * @param from The starting position of the desired substring. The index of the first character in the string is zero.
-      * @param length The number of characters to include in the returned substring.
-      */
-    substr(from: number, length?: number): string;
-
-    /** Returns the primitive value of the specified object. */
-    valueOf(): string;
-
-    readonly [index: number]: string;
-}
-
-interface StringConstructor {
-    new (value?: any): String;
-    (value?: any): string;
-    readonly prototype: String;
-    fromCharCode(...codes: number[]): string;
-}
-
-/**
-  * Allows manipulation and formatting of text strings and determination and location of substrings within strings.
-  */
-declare const String: StringConstructor;
-
-interface Boolean {
-    /** Returns the primitive value of the specified object. */
-    valueOf(): boolean;
-}
-
-interface BooleanConstructor {
-    new (value?: any): Boolean;
-    (value?: any): boolean;
-    readonly prototype: Boolean;
-}
-
-declare const Boolean: BooleanConstructor;
-
-interface Number {
-    /**
-      * Returns a string representation of an object.
-      * @param radix Specifies a radix for converting numeric values to strings. This value is only used for numbers.
-      */
-    toString(radix?: number): string;
-
-    /**
-      * Returns a string representing a number in fixed-point notation.
-      * @param fractionDigits Number of digits after the decimal point. Must be in the range 0 - 20, inclusive.
-      */
-    toFixed(fractionDigits?: number): string;
-
-    /**
-      * Returns a string containing a number represented in exponential notation.
-      * @param fractionDigits Number of digits after the decimal point. Must be in the range 0 - 20, inclusive.
-      */
-    toExponential(fractionDigits?: number): string;
-
-    /**
-      * Returns a string containing a number represented either in exponential or fixed-point notation with a specified number of digits.
-      * @param precision Number of significant digits. Must be in the range 1 - 21, inclusive.
-      */
-    toPrecision(precision?: number): string;
-
-    /** Returns the primitive value of the specified object. */
-    valueOf(): number;
-}
-
-interface NumberConstructor {
-    new (value?: any): Number;
-    (value?: any): number;
-    readonly prototype: Number;
-
-    /** The largest number that can be represented in JavaScript. Equal to approximately 1.79E+308. */
-    readonly MAX_VALUE: number;
-
-    /** The closest number to zero that can be represented in JavaScript. Equal to approximately 5.00E-324. */
-    readonly MIN_VALUE: number;
-
-    /**
-      * A value that is not a number.
-      * In equality comparisons, NaN does not equal any value, including itself. To test whether a value is equivalent to NaN, use the isNaN function.
-      */
-    readonly NaN: number;
-
-    /**
-      * A value that is less than the largest negative number that can be represented in JavaScript.
-      * JavaScript displays NEGATIVE_INFINITY values as -infinity.
-      */
-    readonly NEGATIVE_INFINITY: number;
-
-    /**
-      * A value greater than the largest number that can be represented in JavaScript.
-      * JavaScript displays POSITIVE_INFINITY values as infinity.
-      */
-    readonly POSITIVE_INFINITY: number;
-}
-
-/** An object that represents a number of any kind. All JavaScript numbers are 64-bit floating-point numbers. */
-declare const Number: NumberConstructor;
-
-interface TemplateStringsArray extends ReadonlyArray<string> {
-    readonly raw: ReadonlyArray<string>
-}
-
-interface Math {
-    /** The mathematical constant e. This is Euler's number, the base of natural logarithms. */
-    readonly E: number;
-    /** The natural logarithm of 10. */
-    readonly LN10: number;
-    /** The natural logarithm of 2. */
-    readonly LN2: number;
-    /** The base-2 logarithm of e. */
-    readonly LOG2E: number;
-    /** The base-10 logarithm of e. */
-    readonly LOG10E: number;
-    /** Pi. This is the ratio of the circumference of a circle to its diameter. */
-    readonly PI: number;
-    /** The square root of 0.5, or, equivalently, one divided by the square root of 2. */
-    readonly SQRT1_2: number;
-    /** The square root of 2. */
-    readonly SQRT2: number;
-    /**
-      * Returns the absolute value of a number (the value without regard to whether it is positive or negative).
-      * For example, the absolute value of -5 is the same as the absolute value of 5.
-      * @param x A numeric expression for which the absolute value is needed.
-      */
-    abs(x: number): number;
-    /**
-      * Returns the arc cosine (or inverse cosine) of a number.
-      * @param x A numeric expression.
-      */
-    acos(x: number): number;
-    /**
-      * Returns the arcsine of a number.
-      * @param x A numeric expression.
-      */
-    asin(x: number): number;
-    /**
-      * Returns the arctangent of a number.
-      * @param x A numeric expression for which the arctangent is needed.
-      */
-    atan(x: number): number;
-    /**
-      * Returns the angle (in radians) from the X axis to a point.
-      * @param y A numeric expression representing the cartesian y-coordinate.
-      * @param x A numeric expression representing the cartesian x-coordinate.
-      */
-    atan2(y: number, x: number): number;
-    /**
-      * Returns the smallest number greater than or equal to its numeric argument.
-      * @param x A numeric expression.
-      */
-    ceil(x: number): number;
-    /**
-      * Returns the cosine of a number.
-      * @param x A numeric expression that contains an angle measured in radians.
-      */
-    cos(x: number): number;
-    /**
-      * Returns e (the base of natural logarithms) raised to a power.
-      * @param x A numeric expression representing the power of e.
-      */
-    exp(x: number): number;
-    /**
-      * Returns the greatest number less than or equal to its numeric argument.
-      * @param x A numeric expression.
-      */
-    floor(x: number): number;
-    /**
-      * Returns the natural logarithm (base e) of a number.
-      * @param x A numeric expression.
-      */
-    log(x: number): number;
-    /**
-      * Returns the larger of a set of supplied numeric expressions.
-      * @param values Numeric expressions to be evaluated.
-      */
-    max(...values: number[]): number;
-    /**
-      * Returns the smaller of a set of supplied numeric expressions.
-      * @param values Numeric expressions to be evaluated.
-      */
-    min(...values: number[]): number;
-    /**
-      * Returns the value of a base expression taken to a specified power.
-      * @param x The base value of the expression.
-      * @param y The exponent value of the expression.
-      */
-    pow(x: number, y: number): number;
-    /** Returns a pseudorandom number between 0 and 1. */
-    random(): number;
-    /**
-      * Returns a supplied numeric expression rounded to the nearest number.
-      * @param x The value to be rounded to the nearest number.
-      */
-    round(x: number): number;
-    /**
-      * Returns the sine of a number.
-      * @param x A numeric expression that contains an angle measured in radians.
-      */
-    sin(x: number): number;
-    /**
-      * Returns the square root of a number.
-      * @param x A numeric expression.
-      */
-    sqrt(x: number): number;
-    /**
-      * Returns the tangent of a number.
-      * @param x A numeric expression that contains an angle measured in radians.
-      */
-    tan(x: number): number;
-}
-/** An intrinsic object that provides basic mathematics functionality and constants. */
-declare const Math: Math;
-
-/** Enables basic storage and retrieval of dates and times. */
-interface Date {
-    /** Returns a string representation of a date. The format of the string depends on the locale. */
-    toString(): string;
-    /** Returns a date as a string value. */
-    toDateString(): string;
-    /** Returns a time as a string value. */
-    toTimeString(): string;
-    /** Returns a value as a string value appropriate to the host environment's current locale. */
-    toLocaleString(): string;
-    /** Returns a date as a string value appropriate to the host environment's current locale. */
-    toLocaleDateString(): string;
-    /** Returns a time as a string value appropriate to the host environment's current locale. */
-    toLocaleTimeString(): string;
-    /** Returns the stored time value in milliseconds since midnight, January 1, 1970 UTC. */
-    valueOf(): number;
-    /** Gets the time value in milliseconds. */
-    getTime(): number;
-    /** Gets the year, using local time. */
-    getFullYear(): number;
-    /** Gets the year using Universal Coordinated Time (UTC). */
-    getUTCFullYear(): number;
-    /** Gets the month, using local time. */
-    getMonth(): number;
-    /** Gets the month of a Date object using Universal Coordinated Time (UTC). */
-    getUTCMonth(): number;
-    /** Gets the day-of-the-month, using local time. */
-    getDate(): number;
-    /** Gets the day-of-the-month, using Universal Coordinated Time (UTC). */
-    getUTCDate(): number;
-    /** Gets the day of the week, using local time. */
-    getDay(): number;
-    /** Gets the day of the week using Universal Coordinated Time (UTC). */
-    getUTCDay(): number;
-    /** Gets the hours in a date, using local time. */
-    getHours(): number;
-    /** Gets the hours value in a Date object using Universal Coordinated Time (UTC). */
-    getUTCHours(): number;
-    /** Gets the minutes of a Date object, using local time. */
-    getMinutes(): number;
-    /** Gets the minutes of a Date object using Universal Coordinated Time (UTC). */
-    getUTCMinutes(): number;
-    /** Gets the seconds of a Date object, using local time. */
-    getSeconds(): number;
-    /** Gets the seconds of a Date object using Universal Coordinated Time (UTC). */
-    getUTCSeconds(): number;
-    /** Gets the milliseconds of a Date, using local time. */
-    getMilliseconds(): number;
-    /** Gets the milliseconds of a Date object using Universal Coordinated Time (UTC). */
-    getUTCMilliseconds(): number;
-    /** Gets the difference in minutes between the time on the local computer and Universal Coordinated Time (UTC). */
-    getTimezoneOffset(): number;
-    /**
-      * Sets the date and time value in the Date object.
-      * @param time A numeric value representing the number of elapsed milliseconds since midnight, January 1, 1970 GMT.
-      */
-    setTime(time: number): number;
-    /**
-      * Sets the milliseconds value in the Date object using local time.
-      * @param ms A numeric value equal to the millisecond value.
-      */
-    setMilliseconds(ms: number): number;
-    /**
-      * Sets the milliseconds value in the Date object using Universal Coordinated Time (UTC).
-      * @param ms A numeric value equal to the millisecond value.
-      */
-    setUTCMilliseconds(ms: number): number;
-
-    /**
-      * Sets the seconds value in the Date object using local time.
-      * @param sec A numeric value equal to the seconds value.
-      * @param ms A numeric value equal to the milliseconds value.
-      */
-    setSeconds(sec: number, ms?: number): number;
-    /**
-      * Sets the seconds value in the Date object using Universal Coordinated Time (UTC).
-      * @param sec A numeric value equal to the seconds value.
-      * @param ms A numeric value equal to the milliseconds value.
-      */
-    setUTCSeconds(sec: number, ms?: number): number;
-    /**
-      * Sets the minutes value in the Date object using local time.
-      * @param min A numeric value equal to the minutes value.
-      * @param sec A numeric value equal to the seconds value.
-      * @param ms A numeric value equal to the milliseconds value.
-      */
-    setMinutes(min: number, sec?: number, ms?: number): number;
-    /**
-      * Sets the minutes value in the Date object using Universal Coordinated Time (UTC).
-      * @param min A numeric value equal to the minutes value.
-      * @param sec A numeric value equal to the seconds value.
-      * @param ms A numeric value equal to the milliseconds value.
-      */
-    setUTCMinutes(min: number, sec?: number, ms?: number): number;
-    /**
-      * Sets the hour value in the Date object using local time.
-      * @param hours A numeric value equal to the hours value.
-      * @param min A numeric value equal to the minutes value.
-      * @param sec A numeric value equal to the seconds value.
-      * @param ms A numeric value equal to the milliseconds value.
-      */
-    setHours(hours: number, min?: number, sec?: number, ms?: number): number;
-    /**
-      * Sets the hours value in the Date object using Universal Coordinated Time (UTC).
-      * @param hours A numeric value equal to the hours value.
-      * @param min A numeric value equal to the minutes value.
-      * @param sec A numeric value equal to the seconds value.
-      * @param ms A numeric value equal to the milliseconds value.
-      */
-    setUTCHours(hours: number, min?: number, sec?: number, ms?: number): number;
-    /**
-      * Sets the numeric day-of-the-month value of the Date object using local time.
-      * @param date A numeric value equal to the day of the month.
-      */
-    setDate(date: number): number;
-    /**
-      * Sets the numeric day of the month in the Date object using Universal Coordinated Time (UTC).
-      * @param date A numeric value equal to the day of the month.
-      */
-    setUTCDate(date: number): number;
-    /**
-      * Sets the month value in the Date object using local time.
-      * @param month A numeric value equal to the month. The value for January is 0, and other month values follow consecutively.
-      * @param date A numeric value representing the day of the month. If this value is not supplied, the value from a call to the getDate method is used.
-      */
-    setMonth(month: number, date?: number): number;
-    /**
-      * Sets the month value in the Date object using Universal Coordinated Time (UTC).
-      * @param month A numeric value equal to the month. The value for January is 0, and other month values follow consecutively.
-      * @param date A numeric value representing the day of the month. If it is not supplied, the value from a call to the getUTCDate method is used.
-      */
-    setUTCMonth(month: number, date?: number): number;
-    /**
-      * Sets the year of the Date object using local time.
-      * @param year A numeric value for the year.
-      * @param month A zero-based numeric value for the month (0 for January, 11 for December). Must be specified if numDate is specified.
-      * @param date A numeric value equal for the day of the month.
-      */
-    setFullYear(year: number, month?: number, date?: number): number;
-    /**
-      * Sets the year value in the Date object using Universal Coordinated Time (UTC).
-      * @param year A numeric value equal to the year.
-      * @param month A numeric value equal to the month. The value for January is 0, and other month values follow consecutively. Must be supplied if numDate is supplied.
-      * @param date A numeric value equal to the day of the month.
-      */
-    setUTCFullYear(year: number, month?: number, date?: number): number;
-    /** Returns a date converted to a string using Universal Coordinated Time (UTC). */
-    toUTCString(): string;
-    /** Returns a date as a string value in ISO format. */
-    toISOString(): string;
-    /** Used by the JSON.stringify method to enable the transformation of an object's data for JavaScript Object Notation (JSON) serialization. */
-    toJSON(key?: any): string;
-}
-
-interface DateConstructor {
-    new (): Date;
-    new (value: number): Date;
-    new (value: string): Date;
-    new (year: number, month: number, date?: number, hours?: number, minutes?: number, seconds?: number, ms?: number): Date;
-    (): string;
-    readonly prototype: Date;
-    /**
-      * Parses a string containing a date, and returns the number of milliseconds between that date and midnight, January 1, 1970.
-      * @param s A date string
-      */
-    parse(s: string): number;
-    /**
-      * Returns the number of milliseconds between midnight, January 1, 1970 Universal Coordinated Time (UTC) (or GMT) and the specified date.
-      * @param year The full year designation is required for cross-century date accuracy. If year is between 0 and 99 is used, then year is assumed to be 1900 + year.
-      * @param month The month as an number between 0 and 11 (January to December).
-      * @param date The date as an number between 1 and 31.
-      * @param hours Must be supplied if minutes is supplied. An number from 0 to 23 (midnight to 11pm) that specifies the hour.
-      * @param minutes Must be supplied if seconds is supplied. An number from 0 to 59 that specifies the minutes.
-      * @param seconds Must be supplied if milliseconds is supplied. An number from 0 to 59 that specifies the seconds.
-      * @param ms An number from 0 to 999 that specifies the milliseconds.
-      */
-    UTC(year: number, month: number, date?: number, hours?: number, minutes?: number, seconds?: number, ms?: number): number;
-    now(): number;
-}
-
-declare const Date: DateConstructor;
-
-interface RegExpMatchArray extends Array<string> {
-    index?: number;
-    input?: string;
-}
-
-interface RegExpExecArray extends Array<string> {
-    index: number;
-    input: string;
-}
-
-interface RegExp {
-    /**
-      * Executes a search on a string using a regular expression pattern, and returns an array containing the results of that search.
-      * @param string The String object or string literal on which to perform the search.
-      */
-    exec(string: string): RegExpExecArray | null;
-
-    /**
-      * Returns a Boolean value that indicates whether or not a pattern exists in a searched string.
-      * @param string String on which to perform the search.
-      */
-    test(string: string): boolean;
-
-    /** Returns a copy of the text of the regular expression pattern. Read-only. The regExp argument is a Regular expression object. It can be a variable name or a literal. */
-    readonly source: string;
-
-    /** Returns a Boolean value indicating the state of the global flag (g) used with a regular expression. Default is false. Read-only. */
-    readonly global: boolean;
-
-    /** Returns a Boolean value indicating the state of the ignoreCase flag (i) used with a regular expression. Default is false. Read-only. */
-    readonly ignoreCase: boolean;
-
-    /** Returns a Boolean value indicating the state of the multiline flag (m) used with a regular expression. Default is false. Read-only. */
-    readonly multiline: boolean;
-
-    lastIndex: number;
-
-    // Non-standard extensions
-    compile(): this;
-}
-
-interface RegExpConstructor {
-    new (pattern: RegExp): RegExp;
-    new (pattern: string, flags?: string): RegExp;
-    (pattern: RegExp): RegExp;
-    (pattern: string, flags?: string): RegExp;
-    readonly prototype: RegExp;
-
-    // Non-standard extensions
-    $1: string;
-    $2: string;
-    $3: string;
-    $4: string;
-    $5: string;
-    $6: string;
-    $7: string;
-    $8: string;
-    $9: string;
-    lastMatch: string;
-}
-
-declare const RegExp: RegExpConstructor;
-
-interface Error {
-    name: string;
-    message: string;
-    stack?: string;
-}
-
-interface ErrorConstructor {
-    new (message?: string): Error;
-    (message?: string): Error;
-    readonly prototype: Error;
-}
-
-declare const Error: ErrorConstructor;
-
-interface EvalError extends Error {
-}
-
-interface EvalErrorConstructor {
-    new (message?: string): EvalError;
-    (message?: string): EvalError;
-    readonly prototype: EvalError;
-}
-
-declare const EvalError: EvalErrorConstructor;
-
-interface RangeError extends Error {
-}
-
-interface RangeErrorConstructor {
-    new (message?: string): RangeError;
-    (message?: string): RangeError;
-    readonly prototype: RangeError;
-}
-
-declare const RangeError: RangeErrorConstructor;
-
-interface ReferenceError extends Error {
-}
-
-interface ReferenceErrorConstructor {
-    new (message?: string): ReferenceError;
-    (message?: string): ReferenceError;
-    readonly prototype: ReferenceError;
-}
-
-declare const ReferenceError: ReferenceErrorConstructor;
-
-interface SyntaxError extends Error {
-}
-
-interface SyntaxErrorConstructor {
-    new (message?: string): SyntaxError;
-    (message?: string): SyntaxError;
-    readonly prototype: SyntaxError;
-}
-
-declare const SyntaxError: SyntaxErrorConstructor;
-
-interface TypeError extends Error {
-}
-
-interface TypeErrorConstructor {
-    new (message?: string): TypeError;
-    (message?: string): TypeError;
-    readonly prototype: TypeError;
-}
-
-declare const TypeError: TypeErrorConstructor;
-
-interface URIError extends Error {
-}
-
-interface URIErrorConstructor {
-    new (message?: string): URIError;
-    (message?: string): URIError;
-    readonly prototype: URIError;
-}
-
-declare const URIError: URIErrorConstructor;
-
-interface JSON {
-    /**
-      * Converts a JavaScript Object Notation (JSON) string into an object.
-      * @param text A valid JSON string.
-      * @param reviver A function that transforms the results. This function is called for each member of the object.
-      * If a member contains nested objects, the nested objects are transformed before the parent object is.
-      */
-    parse(text: string, reviver?: (key: any, value: any) => any): any;
-    /**
-      * Converts a JavaScript value to a JavaScript Object Notation (JSON) string.
-      * @param value A JavaScript value, usually an object or array, to be converted.
-      * @param replacer A function that transforms the results.
-      * @param space Adds indentation, white space, and line break characters to the return-value JSON text to make it easier to read.
-      */
-    stringify(value: any, replacer?: (key: string, value: any) => any, space?: string | number): string;
-    /**
-      * Converts a JavaScript value to a JavaScript Object Notation (JSON) string.
-      * @param value A JavaScript value, usually an object or array, to be converted.
-      * @param replacer An array of strings and numbers that acts as a approved list for selecting the object properties that will be stringified.
-      * @param space Adds indentation, white space, and line break characters to the return-value JSON text to make it easier to read.
-      */
-    stringify(value: any, replacer?: (number | string)[] | null, space?: string | number): string;
-}
-
-/**
-  * An intrinsic object that provides functions to convert JavaScript values to and from the JavaScript Object Notation (JSON) format.
-  */
-declare const JSON: JSON;
-
-
-/////////////////////////////
-/// ECMAScript Array API (specially handled by compiler)
-/////////////////////////////
-
-interface ReadonlyArray<T> {
-    /**
-      * Gets the length of the array. This is a number one higher than the highest element defined in an array.
-      */
-    readonly length: number;
-    /**
-      * Returns a string representation of an array.
-      */
-    toString(): string;
-    toLocaleString(): string;
-    /**
-      * Combines two or more arrays.
-      * @param items Additional items to add to the end of array1.
-      */
-    concat<U extends ReadonlyArray<T>>(...items: U[]): T[];
-    /**
-      * Combines two or more arrays.
-      * @param items Additional items to add to the end of array1.
-      */
-    concat(...items: T[][]): T[];
-    /**
-      * Combines two or more arrays.
-      * @param items Additional items to add to the end of array1.
-      */
-    concat(...items: (T | T[])[]): T[];
-    /**
-      * Adds all the elements of an array separated by the specified separator string.
-      * @param separator A string used to separate one element of an array from the next in the resulting String. If omitted, the array elements are separated with a comma.
-      */
-    join(separator?: string): string;
-    /**
-      * Returns a section of an array.
-      * @param start The beginning of the specified portion of the array.
-      * @param end The end of the specified portion of the array.
-      */
-    slice(start?: number, end?: number): T[];
-    /**
-      * Returns the index of the first occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the search starts at index 0.
-      */
-    indexOf(searchElement: T, fromIndex?: number): number;
-
-    /**
-      * Returns the index of the last occurrence of a specified value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the search starts at the last index in the array.
-      */
-    lastIndexOf(searchElement: T, fromIndex?: number): number;
-    /**
-      * Determines whether all the members of an array satisfy the specified test.
-      * @param callbackfn A function that accepts up to three arguments. The every method calls the callbackfn function for each element in array1 until the callbackfn returns false, or until the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
-      */
-    every(callbackfn: (value: T, index: number, array: ReadonlyArray<T>) => boolean, thisArg?: any): boolean;
-    /**
-      * Determines whether the specified callback function returns true for any element of an array.
-      * @param callbackfn A function that accepts up to three arguments. The some method calls the callbackfn function for each element in array1 until the callbackfn returns true, or until the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
-      */
-    some(callbackfn: (value: T, index: number, array: ReadonlyArray<T>) => boolean, thisArg?: any): boolean;
-    /**
-      * Performs the specified action for each element in an array.
-      * @param callbackfn  A function that accepts up to three arguments. forEach calls the callbackfn function one time for each element in the array.
-      * @param thisArg  An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
-      */
-    forEach(callbackfn: (value: T, index: number, array: ReadonlyArray<T>) => void, thisArg?: any): void;
-    /**
-      * Calls a defined callback function on each element of an array, and returns an array that contains the results.
-      * @param callbackfn A function that accepts up to three arguments. The map method calls the callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
-      */
-    map<U>(callbackfn: (value: T, index: number, array: ReadonlyArray<T>) => U, thisArg?: any): U[];
-    /**
-     * Returns the elements of an array that meet the condition specified in a callback function.
-     * @param callbackfn A function that accepts up to three arguments. The filter method calls the callbackfn function one time for each element in the array.
-     * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
-     */
-    filter<S extends T>(callbackfn: (value: T, index: number, array: ReadonlyArray<T>) => value is S, thisArg?: any): S[];
-    /**
-      * Returns the elements of an array that meet the condition specified in a callback function.
-      * @param callbackfn A function that accepts up to three arguments. The filter method calls the callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
-      */
-    filter(callbackfn: (value: T, index: number, array: ReadonlyArray<T>) => any, thisArg?: any): T[];
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
-      */
-    reduce(callbackfn: (previousValue: T, currentValue: T, currentIndex: number, array: ReadonlyArray<T>) => T, initialValue?: T): T;
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
-      */
-    reduce<U>(callbackfn: (previousValue: U, currentValue: T, currentIndex: number, array: ReadonlyArray<T>) => U, initialValue: U): U;
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
-      */
-    reduceRight(callbackfn: (previousValue: T, currentValue: T, currentIndex: number, array: ReadonlyArray<T>) => T, initialValue?: T): T;
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
-      */
-    reduceRight<U>(callbackfn: (previousValue: U, currentValue: T, currentIndex: number, array: ReadonlyArray<T>) => U, initialValue: U): U;
-
-    readonly [n: number]: T;
-}
-
-interface Array<T> {
-    /**
-      * Gets or sets the length of the array. This is a number one higher than the highest element defined in an array.
-      */
-    length: number;
-    /**
-      * Returns a string representation of an array.
-      */
-    toString(): string;
-    toLocaleString(): string;
-    /**
-      * Appends new elements to an array, and returns the new length of the array.
-      * @param items New elements of the Array.
-      */
-    push(...items: T[]): number;
-    /**
-      * Removes the last element from an array and returns it.
-      */
-    pop(): T | undefined;
-    /**
-      * Combines two or more arrays.
-      * @param items Additional items to add to the end of array1.
-      */
-    concat(...items: T[][]): T[];
-    /**
-      * Combines two or more arrays.
-      * @param items Additional items to add to the end of array1.
-      */
-    concat(...items: (T | T[])[]): T[];
-    /**
-      * Adds all the elements of an array separated by the specified separator string.
-      * @param separator A string used to separate one element of an array from the next in the resulting String. If omitted, the array elements are separated with a comma.
-      */
-    join(separator?: string): string;
-    /**
-      * Reverses the elements in an Array.
-      */
-    reverse(): T[];
-    /**
-      * Removes the first element from an array and returns it.
-      */
-    shift(): T | undefined;
-    /**
-      * Returns a section of an array.
-      * @param start The beginning of the specified portion of the array.
-      * @param end The end of the specified portion of the array.
-      */
-    slice(start?: number, end?: number): T[];
-    /**
-      * Sorts an array.
-      * @param compareFn The name of the function used to determine the order of the elements. If omitted, the elements are sorted in ascending, ASCII character order.
-      */
-    sort(compareFn?: (a: T, b: T) => number): this;
-    /**
-      * Removes elements from an array and, if necessary, inserts new elements in their place, returning the deleted elements.
-      * @param start The zero-based location in the array from which to start removing elements.
-      */
-    splice(start: number): T[];
-    /**
-      * Removes elements from an array and, if necessary, inserts new elements in their place, returning the deleted elements.
-      * @param start The zero-based location in the array from which to start removing elements.
-      * @param deleteCount The number of elements to remove.
-      * @param items Elements to insert into the array in place of the deleted elements.
-      */
-    splice(start: number, deleteCount: number, ...items: T[]): T[];
-    /**
-      * Inserts new elements at the start of an array.
-      * @param items  Elements to insert at the start of the Array.
-      */
-    unshift(...items: T[]): number;
-    /**
-      * Returns the index of the first occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the search starts at index 0.
-      */
-    indexOf(searchElement: T, fromIndex?: number): number;
-    /**
-      * Returns the index of the last occurrence of a specified value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the search starts at the last index in the array.
-      */
-    lastIndexOf(searchElement: T, fromIndex?: number): number;
-    /**
-      * Determines whether all the members of an array satisfy the specified test.
-      * @param callbackfn A function that accepts up to three arguments. The every method calls the callbackfn function for each element in array1 until the callbackfn returns false, or until the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
-      */
-    every(callbackfn: (value: T, index: number, array: T[]) => boolean, thisArg?: any): boolean;
-    /**
-      * Determines whether the specified callback function returns true for any element of an array.
-      * @param callbackfn A function that accepts up to three arguments. The some method calls the callbackfn function for each element in array1 until the callbackfn returns true, or until the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
-      */
-    some(callbackfn: (value: T, index: number, array: T[]) => boolean, thisArg?: any): boolean;
-    /**
-      * Performs the specified action for each element in an array.
-      * @param callbackfn  A function that accepts up to three arguments. forEach calls the callbackfn function one time for each element in the array.
-      * @param thisArg  An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
-      */
-    forEach(callbackfn: (value: T, index: number, array: T[]) => void, thisArg?: any): void;
-    /**
-      * Calls a defined callback function on each element of an array, and returns an array that contains the results.
-      * @param callbackfn A function that accepts up to three arguments. The map method calls the callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
-      */
-    map<U>(callbackfn: (value: T, index: number, array: T[]) => U, thisArg?: any): U[];
-    /**
-      * Returns the elements of an array that meet the condition specified in a callback function.
-      * @param callbackfn A function that accepts up to three arguments. The filter method calls the callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
-      */
-    filter(callbackfn: (value: T, index: number, array: T[]) => any, thisArg?: any): T[];
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
-      */
-    reduce(callbackfn: (previousValue: T, currentValue: T, currentIndex: number, array: T[]) => T, initialValue?: T): T;
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
-      */
-    reduce<U>(callbackfn: (previousValue: U, currentValue: T, currentIndex: number, array: T[]) => U, initialValue: U): U;
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
-      */
-    reduceRight(callbackfn: (previousValue: T, currentValue: T, currentIndex: number, array: T[]) => T, initialValue?: T): T;
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
-      */
-    reduceRight<U>(callbackfn: (previousValue: U, currentValue: T, currentIndex: number, array: T[]) => U, initialValue: U): U;
-
-    [n: number]: T;
-}
-
-interface ArrayConstructor {
-    new (arrayLength?: number): any[];
-    new <T>(arrayLength: number): T[];
-    new <T>(...items: T[]): T[];
-    (arrayLength?: number): any[];
-    <T>(arrayLength: number): T[];
-    <T>(...items: T[]): T[];
-    isArray(arg: any): arg is Array<any>;
-    readonly prototype: Array<any>;
-}
-
-declare const Array: ArrayConstructor;
-
-interface TypedPropertyDescriptor<T> {
-    enumerable?: boolean;
-    configurable?: boolean;
-    writable?: boolean;
-    value?: T;
-    get?: () => T;
-    set?: (value: T) => void;
-}
-
-declare type ClassDecorator = <TFunction extends Function>(target: TFunction) => TFunction | void;
-declare type PropertyDecorator = (target: Object, propertyKey: string | symbol) => void;
-declare type MethodDecorator = <T>(target: Object, propertyKey: string | symbol, descriptor: TypedPropertyDescriptor<T>) => TypedPropertyDescriptor<T> | void;
-declare type ParameterDecorator = (target: Object, propertyKey: string | symbol, parameterIndex: number) => void;
-
-declare type PromiseConstructorLike = new <T>(executor: (resolve: (value?: T | PromiseLike<T>) => void, reject: (reason?: any) => void) => void) => PromiseLike<T>;
-
-interface PromiseLike<T> {
-    /**
-     * Attaches callbacks for the resolution and/or rejection of the Promise.
-     * @param onfulfilled The callback to execute when the Promise is resolved.
-     * @param onrejected The callback to execute when the Promise is rejected.
-     * @returns A Promise for the completion of which ever callback is executed.
-     */
-    then(
-        onfulfilled?: ((value: T) => T | PromiseLike<T>) | undefined | null,
-        onrejected?: ((reason: any) => T | PromiseLike<T>) | undefined | null): PromiseLike<T>;
-
-    /**
-     * Attaches callbacks for the resolution and/or rejection of the Promise.
-     * @param onfulfilled The callback to execute when the Promise is resolved.
-     * @param onrejected The callback to execute when the Promise is rejected.
-     * @returns A Promise for the completion of which ever callback is executed.
-     */
-    then<TResult>(
-        onfulfilled: ((value: T) => T | PromiseLike<T>) | undefined | null,
-        onrejected: (reason: any) => TResult | PromiseLike<TResult>): PromiseLike<T | TResult>;
-
-    /**
-     * Attaches callbacks for the resolution and/or rejection of the Promise.
-     * @param onfulfilled The callback to execute when the Promise is resolved.
-     * @param onrejected The callback to execute when the Promise is rejected.
-     * @returns A Promise for the completion of which ever callback is executed.
-     */
-    then<TResult>(
-        onfulfilled: (value: T) => TResult | PromiseLike<TResult>,
-        onrejected?: ((reason: any) => TResult | PromiseLike<TResult>) | undefined | null): PromiseLike<TResult>;
-
-    /**
-     * Attaches callbacks for the resolution and/or rejection of the Promise.
-     * @param onfulfilled The callback to execute when the Promise is resolved.
-     * @param onrejected The callback to execute when the Promise is rejected.
-     * @returns A Promise for the completion of which ever callback is executed.
-     */
-    then<TResult1, TResult2>(
-        onfulfilled: (value: T) => TResult1 | PromiseLike<TResult1>,
-        onrejected: (reason: any) => TResult2 | PromiseLike<TResult2>): PromiseLike<TResult1 | TResult2>;
-}
-
-interface ArrayLike<T> {
-    readonly length: number;
-    readonly [n: number]: T;
-}
-
-/**
-  * Represents a raw buffer of binary data, which is used to store data for the
-  * different typed arrays. ArrayBuffers cannot be read from or written to directly,
-  * but can be passed to a typed array or DataView Object to interpret the raw
-  * buffer as needed.
-  */
-interface ArrayBuffer {
-    /**
-      * Read-only. The length of the ArrayBuffer (in bytes).
-      */
-    readonly byteLength: number;
-
-    /**
-      * Returns a section of an ArrayBuffer.
-      */
-    slice(begin:number, end?:number): ArrayBuffer;
-}
-
-interface ArrayBufferConstructor {
-    readonly prototype: ArrayBuffer;
-    new (byteLength: number): ArrayBuffer;
-    isView(arg: any): arg is ArrayBufferView;
-}
-declare const ArrayBuffer: ArrayBufferConstructor;
-
-interface ArrayBufferView {
-    /**
-      * The ArrayBuffer instance referenced by the array.
-      */
-    buffer: ArrayBuffer;
-
-    /**
-      * The length in bytes of the array.
-      */
-    byteLength: number;
-
-    /**
-      * The offset in bytes of the array.
-      */
-    byteOffset: number;
-}
-
-interface DataView {
-    readonly buffer: ArrayBuffer;
-    readonly byteLength: number;
-    readonly byteOffset: number;
-    /**
-      * Gets the Float32 value at the specified byte offset from the start of the view. There is
-      * no alignment constraint; multi-byte values may be fetched from any offset.
-      * @param byteOffset The place in the buffer at which the value should be retrieved.
-      */
-    getFloat32(byteOffset: number, littleEndian?: boolean): number;
-
-    /**
-      * Gets the Float64 value at the specified byte offset from the start of the view. There is
-      * no alignment constraint; multi-byte values may be fetched from any offset.
-      * @param byteOffset The place in the buffer at which the value should be retrieved.
-      */
-    getFloat64(byteOffset: number, littleEndian?: boolean): number;
-
-    /**
-      * Gets the Int8 value at the specified byte offset from the start of the view. There is
-      * no alignment constraint; multi-byte values may be fetched from any offset.
-      * @param byteOffset The place in the buffer at which the value should be retrieved.
-      */
-    getInt8(byteOffset: number): number;
-
-    /**
-      * Gets the Int16 value at the specified byte offset from the start of the view. There is
-      * no alignment constraint; multi-byte values may be fetched from any offset.
-      * @param byteOffset The place in the buffer at which the value should be retrieved.
-      */
-    getInt16(byteOffset: number, littleEndian?: boolean): number;
-    /**
-      * Gets the Int32 value at the specified byte offset from the start of the view. There is
-      * no alignment constraint; multi-byte values may be fetched from any offset.
-      * @param byteOffset The place in the buffer at which the value should be retrieved.
-      */
-    getInt32(byteOffset: number, littleEndian?: boolean): number;
-
-    /**
-      * Gets the Uint8 value at the specified byte offset from the start of the view. There is
-      * no alignment constraint; multi-byte values may be fetched from any offset.
-      * @param byteOffset The place in the buffer at which the value should be retrieved.
-      */
-    getUint8(byteOffset: number): number;
-
-    /**
-      * Gets the Uint16 value at the specified byte offset from the start of the view. There is
-      * no alignment constraint; multi-byte values may be fetched from any offset.
-      * @param byteOffset The place in the buffer at which the value should be retrieved.
-      */
-    getUint16(byteOffset: number, littleEndian?: boolean): number;
-
-    /**
-      * Gets the Uint32 value at the specified byte offset from the start of the view. There is
-      * no alignment constraint; multi-byte values may be fetched from any offset.
-      * @param byteOffset The place in the buffer at which the value should be retrieved.
-      */
-    getUint32(byteOffset: number, littleEndian?: boolean): number;
-
-    /**
-      * Stores an Float32 value at the specified byte offset from the start of the view.
-      * @param byteOffset The place in the buffer at which the value should be set.
-      * @param value The value to set.
-      * @param littleEndian If false or undefined, a big-endian value should be written,
-      * otherwise a little-endian value should be written.
-      */
-    setFloat32(byteOffset: number, value: number, littleEndian?: boolean): void;
-
-    /**
-      * Stores an Float64 value at the specified byte offset from the start of the view.
-      * @param byteOffset The place in the buffer at which the value should be set.
-      * @param value The value to set.
-      * @param littleEndian If false or undefined, a big-endian value should be written,
-      * otherwise a little-endian value should be written.
-      */
-    setFloat64(byteOffset: number, value: number, littleEndian?: boolean): void;
-
-    /**
-      * Stores an Int8 value at the specified byte offset from the start of the view.
-      * @param byteOffset The place in the buffer at which the value should be set.
-      * @param value The value to set.
-      */
-    setInt8(byteOffset: number, value: number): void;
-
-    /**
-      * Stores an Int16 value at the specified byte offset from the start of the view.
-      * @param byteOffset The place in the buffer at which the value should be set.
-      * @param value The value to set.
-      * @param littleEndian If false or undefined, a big-endian value should be written,
-      * otherwise a little-endian value should be written.
-      */
-    setInt16(byteOffset: number, value: number, littleEndian?: boolean): void;
-
-    /**
-      * Stores an Int32 value at the specified byte offset from the start of the view.
-      * @param byteOffset The place in the buffer at which the value should be set.
-      * @param value The value to set.
-      * @param littleEndian If false or undefined, a big-endian value should be written,
-      * otherwise a little-endian value should be written.
-      */
-    setInt32(byteOffset: number, value: number, littleEndian?: boolean): void;
-
-    /**
-      * Stores an Uint8 value at the specified byte offset from the start of the view.
-      * @param byteOffset The place in the buffer at which the value should be set.
-      * @param value The value to set.
-      */
-    setUint8(byteOffset: number, value: number): void;
-
-    /**
-      * Stores an Uint16 value at the specified byte offset from the start of the view.
-      * @param byteOffset The place in the buffer at which the value should be set.
-      * @param value The value to set.
-      * @param littleEndian If false or undefined, a big-endian value should be written,
-      * otherwise a little-endian value should be written.
-      */
-    setUint16(byteOffset: number, value: number, littleEndian?: boolean): void;
-
-    /**
-      * Stores an Uint32 value at the specified byte offset from the start of the view.
-      * @param byteOffset The place in the buffer at which the value should be set.
-      * @param value The value to set.
-      * @param littleEndian If false or undefined, a big-endian value should be written,
-      * otherwise a little-endian value should be written.
-      */
-    setUint32(byteOffset: number, value: number, littleEndian?: boolean): void;
-}
-
-interface DataViewConstructor {
-    new (buffer: ArrayBuffer, byteOffset?: number, byteLength?: number): DataView;
-}
-declare const DataView: DataViewConstructor;
-
-/**
-  * A typed array of 8-bit integer values. The contents are initialized to 0. If the requested
-  * number of bytes could not be allocated an exception is raised.
-  */
-interface Int8Array {
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * The ArrayBuffer instance referenced by the array.
-      */
-    readonly buffer: ArrayBuffer;
-
-    /**
-      * The length in bytes of the array.
-      */
-    readonly byteLength: number;
-
-    /**
-      * The offset in bytes of the array.
-      */
-    readonly byteOffset: number;
-
-    /**
-      * Returns the this object after copying a section of the array identified by start and end
-      * to the same array starting at position target
-      * @param target If target is negative, it is treated as length+target where length is the
-      * length of the array.
-      * @param start If start is negative, it is treated as length+start. If end is negative, it
-      * is treated as length+end.
-      * @param end If not specified, length of the this object is used as its default value.
-      */
-    copyWithin(target: number, start: number, end?: number): this;
-
-    /**
-      * Determines whether all the members of an array satisfy the specified test.
-      * @param callbackfn A function that accepts up to three arguments. The every method calls
-      * the callbackfn function for each element in array1 until the callbackfn returns false,
-      * or until the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    every(callbackfn: (value: number, index: number, array: Int8Array) => boolean, thisArg?: any): boolean;
-
-    /**
-        * Returns the this object after filling the section identified by start and end with value
-        * @param value value to fill array section with
-        * @param start index to start filling the array at. If start is negative, it is treated as
-        * length+start where length is the length of the array.
-        * @param end index to stop filling the array at. If end is negative, it is treated as
-        * length+end.
-        */
-    fill(value: number, start?: number, end?: number): this;
-
-    /**
-      * Returns the elements of an array that meet the condition specified in a callback function.
-      * @param callbackfn A function that accepts up to three arguments. The filter method calls
-      * the callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    filter(callbackfn: (value: number, index: number, array: Int8Array) => any, thisArg?: any): Int8Array;
-
-    /**
-      * Returns the value of the first element in the array where predicate is true, and undefined
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found, find
-      * immediately returns that element value. Otherwise, find returns undefined.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
-
-    /**
-      * Returns the index of the first element in the array where predicate is true, and -1
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found,
-      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
-
-    /**
-      * Performs the specified action for each element in an array.
-      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    forEach(callbackfn: (value: number, index: number, array: Int8Array) => void, thisArg?: any): void;
-
-    /**
-      * Returns the index of the first occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      *  search starts at index 0.
-      */
-    indexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * Adds all the elements of an array separated by the specified separator string.
-      * @param separator A string used to separate one element of an array from the next in the
-      * resulting String. If omitted, the array elements are separated with a comma.
-      */
-    join(separator?: string): string;
-
-    /**
-      * Returns the index of the last occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      * search starts at index 0.
-      */
-    lastIndexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * The length of the array.
-      */
-    readonly length: number;
-
-    /**
-      * Calls a defined callback function on each element of an array, and returns an array that
-      * contains the results.
-      * @param callbackfn A function that accepts up to three arguments. The map method calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    map(callbackfn: (value: number, index: number, array: Int8Array) => number, thisArg?: any): Int8Array;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Int8Array) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Int8Array) => U, initialValue: U): U;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an
-      * argument instead of an array value.
-      */
-    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Int8Array) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Int8Array) => U, initialValue: U): U;
-
-    /**
-      * Reverses the elements in an Array.
-      */
-    reverse(): Int8Array;
-
-    /**
-      * Sets a value or an array of values.
-      * @param index The index of the location to set.
-      * @param value The value to set.
-      */
-    set(index: number, value: number): void;
-
-    /**
-      * Sets a value or an array of values.
-      * @param array A typed or untyped array of values to set.
-      * @param offset The index in the current array at which the values are to be written.
-      */
-    set(array: ArrayLike<number>, offset?: number): void;
-
-    /**
-      * Returns a section of an array.
-      * @param start The beginning of the specified portion of the array.
-      * @param end The end of the specified portion of the array.
-      */
-    slice(start?: number, end?: number): Int8Array;
-
-    /**
-      * Determines whether the specified callback function returns true for any element of an array.
-      * @param callbackfn A function that accepts up to three arguments. The some method calls the
-      * callbackfn function for each element in array1 until the callbackfn returns true, or until
-      * the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    some(callbackfn: (value: number, index: number, array: Int8Array) => boolean, thisArg?: any): boolean;
-
-    /**
-      * Sorts an array.
-      * @param compareFn The name of the function used to determine the order of the elements. If
-      * omitted, the elements are sorted in ascending, ASCII character order.
-      */
-    sort(compareFn?: (a: number, b: number) => number): this;
-
-    /**
-      * Gets a new Int8Array view of the ArrayBuffer store for this array, referencing the elements
-      * at begin, inclusive, up to end, exclusive.
-      * @param begin The index of the beginning of the array.
-      * @param end The index of the end of the array.
-      */
-    subarray(begin: number, end?: number): Int8Array;
-
-    /**
-      * Converts a number to a string by using the current locale.
-      */
-    toLocaleString(): string;
-
-    /**
-      * Returns a string representation of an array.
-      */
-    toString(): string;
-
-    [index: number]: number;
-}
-interface Int8ArrayConstructor {
-    readonly prototype: Int8Array;
-    new (length: number): Int8Array;
-    new (array: ArrayLike<number>): Int8Array;
-    new (buffer: ArrayBuffer, byteOffset?: number, length?: number): Int8Array;
-
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * Returns a new array from a set of elements.
-      * @param items A set of elements to include in the new array object.
-      */
-    of(...items: number[]): Int8Array;
-
-    /**
-      * Creates an array from an array-like or iterable object.
-      * @param arrayLike An array-like or iterable object to convert to an array.
-      * @param mapfn A mapping function to call on every element of the array.
-      * @param thisArg Value of 'this' used to invoke the mapfn.
-      */
-    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Int8Array;
-
-}
-declare const Int8Array: Int8ArrayConstructor;
-
-/**
-  * A typed array of 8-bit unsigned integer values. The contents are initialized to 0. If the
-  * requested number of bytes could not be allocated an exception is raised.
-  */
-interface Uint8Array {
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * The ArrayBuffer instance referenced by the array.
-      */
-    readonly buffer: ArrayBuffer;
-
-    /**
-      * The length in bytes of the array.
-      */
-    readonly byteLength: number;
-
-    /**
-      * The offset in bytes of the array.
-      */
-    readonly byteOffset: number;
-
-    /**
-      * Returns the this object after copying a section of the array identified by start and end
-      * to the same array starting at position target
-      * @param target If target is negative, it is treated as length+target where length is the
-      * length of the array.
-      * @param start If start is negative, it is treated as length+start. If end is negative, it
-      * is treated as length+end.
-      * @param end If not specified, length of the this object is used as its default value.
-      */
-    copyWithin(target: number, start: number, end?: number): this;
-
-    /**
-      * Determines whether all the members of an array satisfy the specified test.
-      * @param callbackfn A function that accepts up to three arguments. The every method calls
-      * the callbackfn function for each element in array1 until the callbackfn returns false,
-      * or until the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    every(callbackfn: (value: number, index: number, array: Uint8Array) => boolean, thisArg?: any): boolean;
-
-    /**
-        * Returns the this object after filling the section identified by start and end with value
-        * @param value value to fill array section with
-        * @param start index to start filling the array at. If start is negative, it is treated as
-        * length+start where length is the length of the array.
-        * @param end index to stop filling the array at. If end is negative, it is treated as
-        * length+end.
-        */
-    fill(value: number, start?: number, end?: number): this;
-
-    /**
-      * Returns the elements of an array that meet the condition specified in a callback function.
-      * @param callbackfn A function that accepts up to three arguments. The filter method calls
-      * the callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    filter(callbackfn: (value: number, index: number, array: Uint8Array) => any, thisArg?: any): Uint8Array;
-
-    /**
-      * Returns the value of the first element in the array where predicate is true, and undefined
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found, find
-      * immediately returns that element value. Otherwise, find returns undefined.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
-
-    /**
-      * Returns the index of the first element in the array where predicate is true, and -1
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found,
-      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
-
-    /**
-      * Performs the specified action for each element in an array.
-      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    forEach(callbackfn: (value: number, index: number, array: Uint8Array) => void, thisArg?: any): void;
-
-    /**
-      * Returns the index of the first occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      *  search starts at index 0.
-      */
-    indexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * Adds all the elements of an array separated by the specified separator string.
-      * @param separator A string used to separate one element of an array from the next in the
-      * resulting String. If omitted, the array elements are separated with a comma.
-      */
-    join(separator?: string): string;
-
-    /**
-      * Returns the index of the last occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      * search starts at index 0.
-      */
-    lastIndexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * The length of the array.
-      */
-    readonly length: number;
-
-    /**
-      * Calls a defined callback function on each element of an array, and returns an array that
-      * contains the results.
-      * @param callbackfn A function that accepts up to three arguments. The map method calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    map(callbackfn: (value: number, index: number, array: Uint8Array) => number, thisArg?: any): Uint8Array;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Uint8Array) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Uint8Array) => U, initialValue: U): U;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an
-      * argument instead of an array value.
-      */
-    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Uint8Array) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Uint8Array) => U, initialValue: U): U;
-
-    /**
-      * Reverses the elements in an Array.
-      */
-    reverse(): Uint8Array;
-
-    /**
-      * Sets a value or an array of values.
-      * @param index The index of the location to set.
-      * @param value The value to set.
-      */
-    set(index: number, value: number): void;
-
-    /**
-      * Sets a value or an array of values.
-      * @param array A typed or untyped array of values to set.
-      * @param offset The index in the current array at which the values are to be written.
-      */
-    set(array: ArrayLike<number>, offset?: number): void;
-
-    /**
-      * Returns a section of an array.
-      * @param start The beginning of the specified portion of the array.
-      * @param end The end of the specified portion of the array.
-      */
-    slice(start?: number, end?: number): Uint8Array;
-
-    /**
-      * Determines whether the specified callback function returns true for any element of an array.
-      * @param callbackfn A function that accepts up to three arguments. The some method calls the
-      * callbackfn function for each element in array1 until the callbackfn returns true, or until
-      * the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    some(callbackfn: (value: number, index: number, array: Uint8Array) => boolean, thisArg?: any): boolean;
-
-    /**
-      * Sorts an array.
-      * @param compareFn The name of the function used to determine the order of the elements. If
-      * omitted, the elements are sorted in ascending, ASCII character order.
-      */
-    sort(compareFn?: (a: number, b: number) => number): this;
-
-    /**
-      * Gets a new Uint8Array view of the ArrayBuffer store for this array, referencing the elements
-      * at begin, inclusive, up to end, exclusive.
-      * @param begin The index of the beginning of the array.
-      * @param end The index of the end of the array.
-      */
-    subarray(begin: number, end?: number): Uint8Array;
-
-    /**
-      * Converts a number to a string by using the current locale.
-      */
-    toLocaleString(): string;
-
-    /**
-      * Returns a string representation of an array.
-      */
-    toString(): string;
-
-    [index: number]: number;
-}
-
-interface Uint8ArrayConstructor {
-    readonly prototype: Uint8Array;
-    new (length: number): Uint8Array;
-    new (array: ArrayLike<number>): Uint8Array;
-    new (buffer: ArrayBuffer, byteOffset?: number, length?: number): Uint8Array;
-
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * Returns a new array from a set of elements.
-      * @param items A set of elements to include in the new array object.
-      */
-    of(...items: number[]): Uint8Array;
-
-    /**
-      * Creates an array from an array-like or iterable object.
-      * @param arrayLike An array-like or iterable object to convert to an array.
-      * @param mapfn A mapping function to call on every element of the array.
-      * @param thisArg Value of 'this' used to invoke the mapfn.
-      */
-    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Uint8Array;
-
-}
-declare const Uint8Array: Uint8ArrayConstructor;
-
-/**
-  * A typed array of 8-bit unsigned integer (clamped) values. The contents are initialized to 0.
-  * If the requested number of bytes could not be allocated an exception is raised.
-  */
-interface Uint8ClampedArray {
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * The ArrayBuffer instance referenced by the array.
-      */
-    readonly buffer: ArrayBuffer;
-
-    /**
-      * The length in bytes of the array.
-      */
-    readonly byteLength: number;
-
-    /**
-      * The offset in bytes of the array.
-      */
-    readonly byteOffset: number;
-
-    /**
-      * Returns the this object after copying a section of the array identified by start and end
-      * to the same array starting at position target
-      * @param target If target is negative, it is treated as length+target where length is the
-      * length of the array.
-      * @param start If start is negative, it is treated as length+start. If end is negative, it
-      * is treated as length+end.
-      * @param end If not specified, length of the this object is used as its default value.
-      */
-    copyWithin(target: number, start: number, end?: number): this;
-
-    /**
-      * Determines whether all the members of an array satisfy the specified test.
-      * @param callbackfn A function that accepts up to three arguments. The every method calls
-      * the callbackfn function for each element in array1 until the callbackfn returns false,
-      * or until the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    every(callbackfn: (value: number, index: number, array: Uint8ClampedArray) => boolean, thisArg?: any): boolean;
-
-    /**
-        * Returns the this object after filling the section identified by start and end with value
-        * @param value value to fill array section with
-        * @param start index to start filling the array at. If start is negative, it is treated as
-        * length+start where length is the length of the array.
-        * @param end index to stop filling the array at. If end is negative, it is treated as
-        * length+end.
-        */
-    fill(value: number, start?: number, end?: number): this;
-
-    /**
-      * Returns the elements of an array that meet the condition specified in a callback function.
-      * @param callbackfn A function that accepts up to three arguments. The filter method calls
-      * the callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    filter(callbackfn: (value: number, index: number, array: Uint8ClampedArray) => any, thisArg?: any): Uint8ClampedArray;
-
-    /**
-      * Returns the value of the first element in the array where predicate is true, and undefined
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found, find
-      * immediately returns that element value. Otherwise, find returns undefined.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
-
-    /**
-      * Returns the index of the first element in the array where predicate is true, and -1
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found,
-      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
-
-    /**
-      * Performs the specified action for each element in an array.
-      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    forEach(callbackfn: (value: number, index: number, array: Uint8ClampedArray) => void, thisArg?: any): void;
-
-    /**
-      * Returns the index of the first occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      *  search starts at index 0.
-      */
-    indexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * Adds all the elements of an array separated by the specified separator string.
-      * @param separator A string used to separate one element of an array from the next in the
-      * resulting String. If omitted, the array elements are separated with a comma.
-      */
-    join(separator?: string): string;
-
-    /**
-      * Returns the index of the last occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      * search starts at index 0.
-      */
-    lastIndexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * The length of the array.
-      */
-    readonly length: number;
-
-    /**
-      * Calls a defined callback function on each element of an array, and returns an array that
-      * contains the results.
-      * @param callbackfn A function that accepts up to three arguments. The map method calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    map(callbackfn: (value: number, index: number, array: Uint8ClampedArray) => number, thisArg?: any): Uint8ClampedArray;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Uint8ClampedArray) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Uint8ClampedArray) => U, initialValue: U): U;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an
-      * argument instead of an array value.
-      */
-    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Uint8ClampedArray) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Uint8ClampedArray) => U, initialValue: U): U;
-
-    /**
-      * Reverses the elements in an Array.
-      */
-    reverse(): Uint8ClampedArray;
-
-    /**
-      * Sets a value or an array of values.
-      * @param index The index of the location to set.
-      * @param value The value to set.
-      */
-    set(index: number, value: number): void;
-
-    /**
-      * Sets a value or an array of values.
-      * @param array A typed or untyped array of values to set.
-      * @param offset The index in the current array at which the values are to be written.
-      */
-    set(array: Uint8ClampedArray, offset?: number): void;
-
-    /**
-      * Returns a section of an array.
-      * @param start The beginning of the specified portion of the array.
-      * @param end The end of the specified portion of the array.
-      */
-    slice(start?: number, end?: number): Uint8ClampedArray;
-
-    /**
-      * Determines whether the specified callback function returns true for any element of an array.
-      * @param callbackfn A function that accepts up to three arguments. The some method calls the
-      * callbackfn function for each element in array1 until the callbackfn returns true, or until
-      * the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    some(callbackfn: (value: number, index: number, array: Uint8ClampedArray) => boolean, thisArg?: any): boolean;
-
-    /**
-      * Sorts an array.
-      * @param compareFn The name of the function used to determine the order of the elements. If
-      * omitted, the elements are sorted in ascending, ASCII character order.
-      */
-    sort(compareFn?: (a: number, b: number) => number): this;
-
-    /**
-      * Gets a new Uint8ClampedArray view of the ArrayBuffer store for this array, referencing the elements
-      * at begin, inclusive, up to end, exclusive.
-      * @param begin The index of the beginning of the array.
-      * @param end The index of the end of the array.
-      */
-    subarray(begin: number, end?: number): Uint8ClampedArray;
-
-    /**
-      * Converts a number to a string by using the current locale.
-      */
-    toLocaleString(): string;
-
-    /**
-      * Returns a string representation of an array.
-      */
-    toString(): string;
-
-    [index: number]: number;
-}
-
-interface Uint8ClampedArrayConstructor {
-    readonly prototype: Uint8ClampedArray;
-    new (length: number): Uint8ClampedArray;
-    new (array: ArrayLike<number>): Uint8ClampedArray;
-    new (buffer: ArrayBuffer, byteOffset?: number, length?: number): Uint8ClampedArray;
-
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * Returns a new array from a set of elements.
-      * @param items A set of elements to include in the new array object.
-      */
-    of(...items: number[]): Uint8ClampedArray;
-
-    /**
-      * Creates an array from an array-like or iterable object.
-      * @param arrayLike An array-like or iterable object to convert to an array.
-      * @param mapfn A mapping function to call on every element of the array.
-      * @param thisArg Value of 'this' used to invoke the mapfn.
-      */
-    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Uint8ClampedArray;
-}
-declare const Uint8ClampedArray: Uint8ClampedArrayConstructor;
-
-/**
-  * A typed array of 16-bit signed integer values. The contents are initialized to 0. If the
-  * requested number of bytes could not be allocated an exception is raised.
-  */
-interface Int16Array {
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * The ArrayBuffer instance referenced by the array.
-      */
-    readonly buffer: ArrayBuffer;
-
-    /**
-      * The length in bytes of the array.
-      */
-    readonly byteLength: number;
-
-    /**
-      * The offset in bytes of the array.
-      */
-    readonly byteOffset: number;
-
-    /**
-      * Returns the this object after copying a section of the array identified by start and end
-      * to the same array starting at position target
-      * @param target If target is negative, it is treated as length+target where length is the
-      * length of the array.
-      * @param start If start is negative, it is treated as length+start. If end is negative, it
-      * is treated as length+end.
-      * @param end If not specified, length of the this object is used as its default value.
-      */
-    copyWithin(target: number, start: number, end?: number): this;
-
-    /**
-      * Determines whether all the members of an array satisfy the specified test.
-      * @param callbackfn A function that accepts up to three arguments. The every method calls
-      * the callbackfn function for each element in array1 until the callbackfn returns false,
-      * or until the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    every(callbackfn: (value: number, index: number, array: Int16Array) => boolean, thisArg?: any): boolean;
-
-    /**
-        * Returns the this object after filling the section identified by start and end with value
-        * @param value value to fill array section with
-        * @param start index to start filling the array at. If start is negative, it is treated as
-        * length+start where length is the length of the array.
-        * @param end index to stop filling the array at. If end is negative, it is treated as
-        * length+end.
-        */
-    fill(value: number, start?: number, end?: number): this;
-
-    /**
-      * Returns the elements of an array that meet the condition specified in a callback function.
-      * @param callbackfn A function that accepts up to three arguments. The filter method calls
-      * the callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    filter(callbackfn: (value: number, index: number, array: Int16Array) => any, thisArg?: any): Int16Array;
-
-    /**
-      * Returns the value of the first element in the array where predicate is true, and undefined
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found, find
-      * immediately returns that element value. Otherwise, find returns undefined.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
-
-    /**
-      * Returns the index of the first element in the array where predicate is true, and -1
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found,
-      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
-
-    /**
-      * Performs the specified action for each element in an array.
-      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    forEach(callbackfn: (value: number, index: number, array: Int16Array) => void, thisArg?: any): void;
-
-    /**
-      * Returns the index of the first occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      *  search starts at index 0.
-      */
-    indexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * Adds all the elements of an array separated by the specified separator string.
-      * @param separator A string used to separate one element of an array from the next in the
-      * resulting String. If omitted, the array elements are separated with a comma.
-      */
-    join(separator?: string): string;
-
-    /**
-      * Returns the index of the last occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      * search starts at index 0.
-      */
-    lastIndexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * The length of the array.
-      */
-    readonly length: number;
-
-    /**
-      * Calls a defined callback function on each element of an array, and returns an array that
-      * contains the results.
-      * @param callbackfn A function that accepts up to three arguments. The map method calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    map(callbackfn: (value: number, index: number, array: Int16Array) => number, thisArg?: any): Int16Array;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Int16Array) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Int16Array) => U, initialValue: U): U;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an
-      * argument instead of an array value.
-      */
-    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Int16Array) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Int16Array) => U, initialValue: U): U;
-
-    /**
-      * Reverses the elements in an Array.
-      */
-    reverse(): Int16Array;
-
-    /**
-      * Sets a value or an array of values.
-      * @param index The index of the location to set.
-      * @param value The value to set.
-      */
-    set(index: number, value: number): void;
-
-    /**
-      * Sets a value or an array of values.
-      * @param array A typed or untyped array of values to set.
-      * @param offset The index in the current array at which the values are to be written.
-      */
-    set(array: ArrayLike<number>, offset?: number): void;
-
-    /**
-      * Returns a section of an array.
-      * @param start The beginning of the specified portion of the array.
-      * @param end The end of the specified portion of the array.
-      */
-    slice(start?: number, end?: number): Int16Array;
-
-    /**
-      * Determines whether the specified callback function returns true for any element of an array.
-      * @param callbackfn A function that accepts up to three arguments. The some method calls the
-      * callbackfn function for each element in array1 until the callbackfn returns true, or until
-      * the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    some(callbackfn: (value: number, index: number, array: Int16Array) => boolean, thisArg?: any): boolean;
-
-    /**
-      * Sorts an array.
-      * @param compareFn The name of the function used to determine the order of the elements. If
-      * omitted, the elements are sorted in ascending, ASCII character order.
-      */
-    sort(compareFn?: (a: number, b: number) => number): this;
-
-    /**
-      * Gets a new Int16Array view of the ArrayBuffer store for this array, referencing the elements
-      * at begin, inclusive, up to end, exclusive.
-      * @param begin The index of the beginning of the array.
-      * @param end The index of the end of the array.
-      */
-    subarray(begin: number, end?: number): Int16Array;
-
-    /**
-      * Converts a number to a string by using the current locale.
-      */
-    toLocaleString(): string;
-
-    /**
-      * Returns a string representation of an array.
-      */
-    toString(): string;
-
-    [index: number]: number;
-}
-
-interface Int16ArrayConstructor {
-    readonly prototype: Int16Array;
-    new (length: number): Int16Array;
-    new (array: ArrayLike<number>): Int16Array;
-    new (buffer: ArrayBuffer, byteOffset?: number, length?: number): Int16Array;
-
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * Returns a new array from a set of elements.
-      * @param items A set of elements to include in the new array object.
-      */
-    of(...items: number[]): Int16Array;
-
-    /**
-      * Creates an array from an array-like or iterable object.
-      * @param arrayLike An array-like or iterable object to convert to an array.
-      * @param mapfn A mapping function to call on every element of the array.
-      * @param thisArg Value of 'this' used to invoke the mapfn.
-      */
-    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Int16Array;
-
-}
-declare const Int16Array: Int16ArrayConstructor;
-
-/**
-  * A typed array of 16-bit unsigned integer values. The contents are initialized to 0. If the
-  * requested number of bytes could not be allocated an exception is raised.
-  */
-interface Uint16Array {
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * The ArrayBuffer instance referenced by the array.
-      */
-    readonly buffer: ArrayBuffer;
-
-    /**
-      * The length in bytes of the array.
-      */
-    readonly byteLength: number;
-
-    /**
-      * The offset in bytes of the array.
-      */
-    readonly byteOffset: number;
-
-    /**
-      * Returns the this object after copying a section of the array identified by start and end
-      * to the same array starting at position target
-      * @param target If target is negative, it is treated as length+target where length is the
-      * length of the array.
-      * @param start If start is negative, it is treated as length+start. If end is negative, it
-      * is treated as length+end.
-      * @param end If not specified, length of the this object is used as its default value.
-      */
-    copyWithin(target: number, start: number, end?: number): this;
-
-    /**
-      * Determines whether all the members of an array satisfy the specified test.
-      * @param callbackfn A function that accepts up to three arguments. The every method calls
-      * the callbackfn function for each element in array1 until the callbackfn returns false,
-      * or until the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    every(callbackfn: (value: number, index: number, array: Uint16Array) => boolean, thisArg?: any): boolean;
-
-    /**
-        * Returns the this object after filling the section identified by start and end with value
-        * @param value value to fill array section with
-        * @param start index to start filling the array at. If start is negative, it is treated as
-        * length+start where length is the length of the array.
-        * @param end index to stop filling the array at. If end is negative, it is treated as
-        * length+end.
-        */
-    fill(value: number, start?: number, end?: number): this;
-
-    /**
-      * Returns the elements of an array that meet the condition specified in a callback function.
-      * @param callbackfn A function that accepts up to three arguments. The filter method calls
-      * the callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    filter(callbackfn: (value: number, index: number, array: Uint16Array) => any, thisArg?: any): Uint16Array;
-
-    /**
-      * Returns the value of the first element in the array where predicate is true, and undefined
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found, find
-      * immediately returns that element value. Otherwise, find returns undefined.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
-
-    /**
-      * Returns the index of the first element in the array where predicate is true, and -1
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found,
-      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
-
-    /**
-      * Performs the specified action for each element in an array.
-      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    forEach(callbackfn: (value: number, index: number, array: Uint16Array) => void, thisArg?: any): void;
-
-    /**
-      * Returns the index of the first occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      *  search starts at index 0.
-      */
-    indexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * Adds all the elements of an array separated by the specified separator string.
-      * @param separator A string used to separate one element of an array from the next in the
-      * resulting String. If omitted, the array elements are separated with a comma.
-      */
-    join(separator?: string): string;
-
-    /**
-      * Returns the index of the last occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      * search starts at index 0.
-      */
-    lastIndexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * The length of the array.
-      */
-    readonly length: number;
-
-    /**
-      * Calls a defined callback function on each element of an array, and returns an array that
-      * contains the results.
-      * @param callbackfn A function that accepts up to three arguments. The map method calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    map(callbackfn: (value: number, index: number, array: Uint16Array) => number, thisArg?: any): Uint16Array;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Uint16Array) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Uint16Array) => U, initialValue: U): U;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an
-      * argument instead of an array value.
-      */
-    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Uint16Array) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Uint16Array) => U, initialValue: U): U;
-
-    /**
-      * Reverses the elements in an Array.
-      */
-    reverse(): Uint16Array;
-
-    /**
-      * Sets a value or an array of values.
-      * @param index The index of the location to set.
-      * @param value The value to set.
-      */
-    set(index: number, value: number): void;
-
-    /**
-      * Sets a value or an array of values.
-      * @param array A typed or untyped array of values to set.
-      * @param offset The index in the current array at which the values are to be written.
-      */
-    set(array: ArrayLike<number>, offset?: number): void;
-
-    /**
-      * Returns a section of an array.
-      * @param start The beginning of the specified portion of the array.
-      * @param end The end of the specified portion of the array.
-      */
-    slice(start?: number, end?: number): Uint16Array;
-
-    /**
-      * Determines whether the specified callback function returns true for any element of an array.
-      * @param callbackfn A function that accepts up to three arguments. The some method calls the
-      * callbackfn function for each element in array1 until the callbackfn returns true, or until
-      * the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    some(callbackfn: (value: number, index: number, array: Uint16Array) => boolean, thisArg?: any): boolean;
-
-    /**
-      * Sorts an array.
-      * @param compareFn The name of the function used to determine the order of the elements. If
-      * omitted, the elements are sorted in ascending, ASCII character order.
-      */
-    sort(compareFn?: (a: number, b: number) => number): this;
-
-    /**
-      * Gets a new Uint16Array view of the ArrayBuffer store for this array, referencing the elements
-      * at begin, inclusive, up to end, exclusive.
-      * @param begin The index of the beginning of the array.
-      * @param end The index of the end of the array.
-      */
-    subarray(begin: number, end?: number): Uint16Array;
-
-    /**
-      * Converts a number to a string by using the current locale.
-      */
-    toLocaleString(): string;
-
-    /**
-      * Returns a string representation of an array.
-      */
-    toString(): string;
-
-    [index: number]: number;
-}
-
-interface Uint16ArrayConstructor {
-    readonly prototype: Uint16Array;
-    new (length: number): Uint16Array;
-    new (array: ArrayLike<number>): Uint16Array;
-    new (buffer: ArrayBuffer, byteOffset?: number, length?: number): Uint16Array;
-
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * Returns a new array from a set of elements.
-      * @param items A set of elements to include in the new array object.
-      */
-    of(...items: number[]): Uint16Array;
-
-    /**
-      * Creates an array from an array-like or iterable object.
-      * @param arrayLike An array-like or iterable object to convert to an array.
-      * @param mapfn A mapping function to call on every element of the array.
-      * @param thisArg Value of 'this' used to invoke the mapfn.
-      */
-    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Uint16Array;
-
-}
-declare const Uint16Array: Uint16ArrayConstructor;
-/**
-  * A typed array of 32-bit signed integer values. The contents are initialized to 0. If the
-  * requested number of bytes could not be allocated an exception is raised.
-  */
-interface Int32Array {
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * The ArrayBuffer instance referenced by the array.
-      */
-    readonly buffer: ArrayBuffer;
-
-    /**
-      * The length in bytes of the array.
-      */
-    readonly byteLength: number;
-
-    /**
-      * The offset in bytes of the array.
-      */
-    readonly byteOffset: number;
-
-    /**
-      * Returns the this object after copying a section of the array identified by start and end
-      * to the same array starting at position target
-      * @param target If target is negative, it is treated as length+target where length is the
-      * length of the array.
-      * @param start If start is negative, it is treated as length+start. If end is negative, it
-      * is treated as length+end.
-      * @param end If not specified, length of the this object is used as its default value.
-      */
-    copyWithin(target: number, start: number, end?: number): this;
-
-    /**
-      * Determines whether all the members of an array satisfy the specified test.
-      * @param callbackfn A function that accepts up to three arguments. The every method calls
-      * the callbackfn function for each element in array1 until the callbackfn returns false,
-      * or until the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    every(callbackfn: (value: number, index: number, array: Int32Array) => boolean, thisArg?: any): boolean;
-
-    /**
-        * Returns the this object after filling the section identified by start and end with value
-        * @param value value to fill array section with
-        * @param start index to start filling the array at. If start is negative, it is treated as
-        * length+start where length is the length of the array.
-        * @param end index to stop filling the array at. If end is negative, it is treated as
-        * length+end.
-        */
-    fill(value: number, start?: number, end?: number): this;
-
-    /**
-      * Returns the elements of an array that meet the condition specified in a callback function.
-      * @param callbackfn A function that accepts up to three arguments. The filter method calls
-      * the callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    filter(callbackfn: (value: number, index: number, array: Int32Array) => any, thisArg?: any): Int32Array;
-
-    /**
-      * Returns the value of the first element in the array where predicate is true, and undefined
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found, find
-      * immediately returns that element value. Otherwise, find returns undefined.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
-
-    /**
-      * Returns the index of the first element in the array where predicate is true, and -1
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found,
-      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
-
-    /**
-      * Performs the specified action for each element in an array.
-      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    forEach(callbackfn: (value: number, index: number, array: Int32Array) => void, thisArg?: any): void;
-
-    /**
-      * Returns the index of the first occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      *  search starts at index 0.
-      */
-    indexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * Adds all the elements of an array separated by the specified separator string.
-      * @param separator A string used to separate one element of an array from the next in the
-      * resulting String. If omitted, the array elements are separated with a comma.
-      */
-    join(separator?: string): string;
-
-    /**
-      * Returns the index of the last occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      * search starts at index 0.
-      */
-    lastIndexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * The length of the array.
-      */
-    readonly length: number;
-
-    /**
-      * Calls a defined callback function on each element of an array, and returns an array that
-      * contains the results.
-      * @param callbackfn A function that accepts up to three arguments. The map method calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    map(callbackfn: (value: number, index: number, array: Int32Array) => number, thisArg?: any): Int32Array;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Int32Array) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Int32Array) => U, initialValue: U): U;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an
-      * argument instead of an array value.
-      */
-    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Int32Array) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Int32Array) => U, initialValue: U): U;
-
-    /**
-      * Reverses the elements in an Array.
-      */
-    reverse(): Int32Array;
-
-    /**
-      * Sets a value or an array of values.
-      * @param index The index of the location to set.
-      * @param value The value to set.
-      */
-    set(index: number, value: number): void;
-
-    /**
-      * Sets a value or an array of values.
-      * @param array A typed or untyped array of values to set.
-      * @param offset The index in the current array at which the values are to be written.
-      */
-    set(array: ArrayLike<number>, offset?: number): void;
-
-    /**
-      * Returns a section of an array.
-      * @param start The beginning of the specified portion of the array.
-      * @param end The end of the specified portion of the array.
-      */
-    slice(start?: number, end?: number): Int32Array;
-
-    /**
-      * Determines whether the specified callback function returns true for any element of an array.
-      * @param callbackfn A function that accepts up to three arguments. The some method calls the
-      * callbackfn function for each element in array1 until the callbackfn returns true, or until
-      * the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    some(callbackfn: (value: number, index: number, array: Int32Array) => boolean, thisArg?: any): boolean;
-
-    /**
-      * Sorts an array.
-      * @param compareFn The name of the function used to determine the order of the elements. If
-      * omitted, the elements are sorted in ascending, ASCII character order.
-      */
-    sort(compareFn?: (a: number, b: number) => number): this;
-
-    /**
-      * Gets a new Int32Array view of the ArrayBuffer store for this array, referencing the elements
-      * at begin, inclusive, up to end, exclusive.
-      * @param begin The index of the beginning of the array.
-      * @param end The index of the end of the array.
-      */
-    subarray(begin: number, end?: number): Int32Array;
-
-    /**
-      * Converts a number to a string by using the current locale.
-      */
-    toLocaleString(): string;
-
-    /**
-      * Returns a string representation of an array.
-      */
-    toString(): string;
-
-    [index: number]: number;
-}
-
-interface Int32ArrayConstructor {
-    readonly prototype: Int32Array;
-    new (length: number): Int32Array;
-    new (array: ArrayLike<number>): Int32Array;
-    new (buffer: ArrayBuffer, byteOffset?: number, length?: number): Int32Array;
-
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * Returns a new array from a set of elements.
-      * @param items A set of elements to include in the new array object.
-      */
-    of(...items: number[]): Int32Array;
-
-    /**
-      * Creates an array from an array-like or iterable object.
-      * @param arrayLike An array-like or iterable object to convert to an array.
-      * @param mapfn A mapping function to call on every element of the array.
-      * @param thisArg Value of 'this' used to invoke the mapfn.
-      */
-    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Int32Array;
-}
-declare const Int32Array: Int32ArrayConstructor;
-
-/**
-  * A typed array of 32-bit unsigned integer values. The contents are initialized to 0. If the
-  * requested number of bytes could not be allocated an exception is raised.
-  */
-interface Uint32Array {
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * The ArrayBuffer instance referenced by the array.
-      */
-    readonly buffer: ArrayBuffer;
-
-    /**
-      * The length in bytes of the array.
-      */
-    readonly byteLength: number;
-
-    /**
-      * The offset in bytes of the array.
-      */
-    readonly byteOffset: number;
-
-    /**
-      * Returns the this object after copying a section of the array identified by start and end
-      * to the same array starting at position target
-      * @param target If target is negative, it is treated as length+target where length is the
-      * length of the array.
-      * @param start If start is negative, it is treated as length+start. If end is negative, it
-      * is treated as length+end.
-      * @param end If not specified, length of the this object is used as its default value.
-      */
-    copyWithin(target: number, start: number, end?: number): this;
-
-    /**
-      * Determines whether all the members of an array satisfy the specified test.
-      * @param callbackfn A function that accepts up to three arguments. The every method calls
-      * the callbackfn function for each element in array1 until the callbackfn returns false,
-      * or until the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    every(callbackfn: (value: number, index: number, array: Uint32Array) => boolean, thisArg?: any): boolean;
-
-    /**
-        * Returns the this object after filling the section identified by start and end with value
-        * @param value value to fill array section with
-        * @param start index to start filling the array at. If start is negative, it is treated as
-        * length+start where length is the length of the array.
-        * @param end index to stop filling the array at. If end is negative, it is treated as
-        * length+end.
-        */
-    fill(value: number, start?: number, end?: number): this;
-
-    /**
-      * Returns the elements of an array that meet the condition specified in a callback function.
-      * @param callbackfn A function that accepts up to three arguments. The filter method calls
-      * the callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    filter(callbackfn: (value: number, index: number, array: Uint32Array) => any, thisArg?: any): Uint32Array;
-
-    /**
-      * Returns the value of the first element in the array where predicate is true, and undefined
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found, find
-      * immediately returns that element value. Otherwise, find returns undefined.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
-
-    /**
-      * Returns the index of the first element in the array where predicate is true, and -1
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found,
-      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
-
-    /**
-      * Performs the specified action for each element in an array.
-      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    forEach(callbackfn: (value: number, index: number, array: Uint32Array) => void, thisArg?: any): void;
-
-    /**
-      * Returns the index of the first occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      *  search starts at index 0.
-      */
-    indexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * Adds all the elements of an array separated by the specified separator string.
-      * @param separator A string used to separate one element of an array from the next in the
-      * resulting String. If omitted, the array elements are separated with a comma.
-      */
-    join(separator?: string): string;
-
-    /**
-      * Returns the index of the last occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      * search starts at index 0.
-      */
-    lastIndexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * The length of the array.
-      */
-    readonly length: number;
-
-    /**
-      * Calls a defined callback function on each element of an array, and returns an array that
-      * contains the results.
-      * @param callbackfn A function that accepts up to three arguments. The map method calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    map(callbackfn: (value: number, index: number, array: Uint32Array) => number, thisArg?: any): Uint32Array;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Uint32Array) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Uint32Array) => U, initialValue: U): U;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an
-      * argument instead of an array value.
-      */
-    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Uint32Array) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Uint32Array) => U, initialValue: U): U;
-
-    /**
-      * Reverses the elements in an Array.
-      */
-    reverse(): Uint32Array;
-
-    /**
-      * Sets a value or an array of values.
-      * @param index The index of the location to set.
-      * @param value The value to set.
-      */
-    set(index: number, value: number): void;
-
-    /**
-      * Sets a value or an array of values.
-      * @param array A typed or untyped array of values to set.
-      * @param offset The index in the current array at which the values are to be written.
-      */
-    set(array: ArrayLike<number>, offset?: number): void;
-
-    /**
-      * Returns a section of an array.
-      * @param start The beginning of the specified portion of the array.
-      * @param end The end of the specified portion of the array.
-      */
-    slice(start?: number, end?: number): Uint32Array;
-
-    /**
-      * Determines whether the specified callback function returns true for any element of an array.
-      * @param callbackfn A function that accepts up to three arguments. The some method calls the
-      * callbackfn function for each element in array1 until the callbackfn returns true, or until
-      * the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    some(callbackfn: (value: number, index: number, array: Uint32Array) => boolean, thisArg?: any): boolean;
-
-    /**
-      * Sorts an array.
-      * @param compareFn The name of the function used to determine the order of the elements. If
-      * omitted, the elements are sorted in ascending, ASCII character order.
-      */
-    sort(compareFn?: (a: number, b: number) => number): this;
-
-    /**
-      * Gets a new Uint32Array view of the ArrayBuffer store for this array, referencing the elements
-      * at begin, inclusive, up to end, exclusive.
-      * @param begin The index of the beginning of the array.
-      * @param end The index of the end of the array.
-      */
-    subarray(begin: number, end?: number): Uint32Array;
-
-    /**
-      * Converts a number to a string by using the current locale.
-      */
-    toLocaleString(): string;
-
-    /**
-      * Returns a string representation of an array.
-      */
-    toString(): string;
-
-    [index: number]: number;
-}
-
-interface Uint32ArrayConstructor {
-    readonly prototype: Uint32Array;
-    new (length: number): Uint32Array;
-    new (array: ArrayLike<number>): Uint32Array;
-    new (buffer: ArrayBuffer, byteOffset?: number, length?: number): Uint32Array;
-
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * Returns a new array from a set of elements.
-      * @param items A set of elements to include in the new array object.
-      */
-    of(...items: number[]): Uint32Array;
-
-    /**
-      * Creates an array from an array-like or iterable object.
-      * @param arrayLike An array-like or iterable object to convert to an array.
-      * @param mapfn A mapping function to call on every element of the array.
-      * @param thisArg Value of 'this' used to invoke the mapfn.
-      */
-    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Uint32Array;
-}
-declare const Uint32Array: Uint32ArrayConstructor;
-
-/**
-  * A typed array of 32-bit float values. The contents are initialized to 0. If the requested number
-  * of bytes could not be allocated an exception is raised.
-  */
-interface Float32Array {
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * The ArrayBuffer instance referenced by the array.
-      */
-    readonly buffer: ArrayBuffer;
-
-    /**
-      * The length in bytes of the array.
-      */
-    readonly byteLength: number;
-
-    /**
-      * The offset in bytes of the array.
-      */
-    readonly byteOffset: number;
-
-    /**
-      * Returns the this object after copying a section of the array identified by start and end
-      * to the same array starting at position target
-      * @param target If target is negative, it is treated as length+target where length is the
-      * length of the array.
-      * @param start If start is negative, it is treated as length+start. If end is negative, it
-      * is treated as length+end.
-      * @param end If not specified, length of the this object is used as its default value.
-      */
-    copyWithin(target: number, start: number, end?: number): this;
-
-    /**
-      * Determines whether all the members of an array satisfy the specified test.
-      * @param callbackfn A function that accepts up to three arguments. The every method calls
-      * the callbackfn function for each element in array1 until the callbackfn returns false,
-      * or until the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    every(callbackfn: (value: number, index: number, array: Float32Array) => boolean, thisArg?: any): boolean;
-
-    /**
-        * Returns the this object after filling the section identified by start and end with value
-        * @param value value to fill array section with
-        * @param start index to start filling the array at. If start is negative, it is treated as
-        * length+start where length is the length of the array.
-        * @param end index to stop filling the array at. If end is negative, it is treated as
-        * length+end.
-        */
-    fill(value: number, start?: number, end?: number): this;
-
-    /**
-      * Returns the elements of an array that meet the condition specified in a callback function.
-      * @param callbackfn A function that accepts up to three arguments. The filter method calls
-      * the callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    filter(callbackfn: (value: number, index: number, array: Float32Array) => any, thisArg?: any): Float32Array;
-
-    /**
-      * Returns the value of the first element in the array where predicate is true, and undefined
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found, find
-      * immediately returns that element value. Otherwise, find returns undefined.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
-
-    /**
-      * Returns the index of the first element in the array where predicate is true, and -1
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found,
-      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
-
-    /**
-      * Performs the specified action for each element in an array.
-      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    forEach(callbackfn: (value: number, index: number, array: Float32Array) => void, thisArg?: any): void;
-
-    /**
-      * Returns the index of the first occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      *  search starts at index 0.
-      */
-    indexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * Adds all the elements of an array separated by the specified separator string.
-      * @param separator A string used to separate one element of an array from the next in the
-      * resulting String. If omitted, the array elements are separated with a comma.
-      */
-    join(separator?: string): string;
-
-    /**
-      * Returns the index of the last occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      * search starts at index 0.
-      */
-    lastIndexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * The length of the array.
-      */
-    readonly length: number;
-
-    /**
-      * Calls a defined callback function on each element of an array, and returns an array that
-      * contains the results.
-      * @param callbackfn A function that accepts up to three arguments. The map method calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    map(callbackfn: (value: number, index: number, array: Float32Array) => number, thisArg?: any): Float32Array;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Float32Array) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Float32Array) => U, initialValue: U): U;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an
-      * argument instead of an array value.
-      */
-    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Float32Array) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Float32Array) => U, initialValue: U): U;
-
-    /**
-      * Reverses the elements in an Array.
-      */
-    reverse(): Float32Array;
-
-    /**
-      * Sets a value or an array of values.
-      * @param index The index of the location to set.
-      * @param value The value to set.
-      */
-    set(index: number, value: number): void;
-
-    /**
-      * Sets a value or an array of values.
-      * @param array A typed or untyped array of values to set.
-      * @param offset The index in the current array at which the values are to be written.
-      */
-    set(array: ArrayLike<number>, offset?: number): void;
-
-    /**
-      * Returns a section of an array.
-      * @param start The beginning of the specified portion of the array.
-      * @param end The end of the specified portion of the array.
-      */
-    slice(start?: number, end?: number): Float32Array;
-
-    /**
-      * Determines whether the specified callback function returns true for any element of an array.
-      * @param callbackfn A function that accepts up to three arguments. The some method calls the
-      * callbackfn function for each element in array1 until the callbackfn returns true, or until
-      * the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    some(callbackfn: (value: number, index: number, array: Float32Array) => boolean, thisArg?: any): boolean;
-
-    /**
-      * Sorts an array.
-      * @param compareFn The name of the function used to determine the order of the elements. If
-      * omitted, the elements are sorted in ascending, ASCII character order.
-      */
-    sort(compareFn?: (a: number, b: number) => number): this;
-
-    /**
-      * Gets a new Float32Array view of the ArrayBuffer store for this array, referencing the elements
-      * at begin, inclusive, up to end, exclusive.
-      * @param begin The index of the beginning of the array.
-      * @param end The index of the end of the array.
-      */
-    subarray(begin: number, end?: number): Float32Array;
-
-    /**
-      * Converts a number to a string by using the current locale.
-      */
-    toLocaleString(): string;
-
-    /**
-      * Returns a string representation of an array.
-      */
-    toString(): string;
-
-    [index: number]: number;
-}
-
-interface Float32ArrayConstructor {
-    readonly prototype: Float32Array;
-    new (length: number): Float32Array;
-    new (array: ArrayLike<number>): Float32Array;
-    new (buffer: ArrayBuffer, byteOffset?: number, length?: number): Float32Array;
-
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * Returns a new array from a set of elements.
-      * @param items A set of elements to include in the new array object.
-      */
-    of(...items: number[]): Float32Array;
-
-    /**
-      * Creates an array from an array-like or iterable object.
-      * @param arrayLike An array-like or iterable object to convert to an array.
-      * @param mapfn A mapping function to call on every element of the array.
-      * @param thisArg Value of 'this' used to invoke the mapfn.
-      */
-    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Float32Array;
-
-}
-declare const Float32Array: Float32ArrayConstructor;
-
-/**
-  * A typed array of 64-bit float values. The contents are initialized to 0. If the requested
-  * number of bytes could not be allocated an exception is raised.
-  */
-interface Float64Array {
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * The ArrayBuffer instance referenced by the array.
-      */
-    readonly buffer: ArrayBuffer;
-
-    /**
-      * The length in bytes of the array.
-      */
-    readonly byteLength: number;
-
-    /**
-      * The offset in bytes of the array.
-      */
-    readonly byteOffset: number;
-
-    /**
-      * Returns the this object after copying a section of the array identified by start and end
-      * to the same array starting at position target
-      * @param target If target is negative, it is treated as length+target where length is the
-      * length of the array.
-      * @param start If start is negative, it is treated as length+start. If end is negative, it
-      * is treated as length+end.
-      * @param end If not specified, length of the this object is used as its default value.
-      */
-    copyWithin(target: number, start: number, end?: number): this;
-
-    /**
-      * Determines whether all the members of an array satisfy the specified test.
-      * @param callbackfn A function that accepts up to three arguments. The every method calls
-      * the callbackfn function for each element in array1 until the callbackfn returns false,
-      * or until the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    every(callbackfn: (value: number, index: number, array: Float64Array) => boolean, thisArg?: any): boolean;
-
-    /**
-        * Returns the this object after filling the section identified by start and end with value
-        * @param value value to fill array section with
-        * @param start index to start filling the array at. If start is negative, it is treated as
-        * length+start where length is the length of the array.
-        * @param end index to stop filling the array at. If end is negative, it is treated as
-        * length+end.
-        */
-    fill(value: number, start?: number, end?: number): this;
-
-    /**
-      * Returns the elements of an array that meet the condition specified in a callback function.
-      * @param callbackfn A function that accepts up to three arguments. The filter method calls
-      * the callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    filter(callbackfn: (value: number, index: number, array: Float64Array) => any, thisArg?: any): Float64Array;
-
-    /**
-      * Returns the value of the first element in the array where predicate is true, and undefined
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found, find
-      * immediately returns that element value. Otherwise, find returns undefined.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
-
-    /**
-      * Returns the index of the first element in the array where predicate is true, and -1
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found,
-      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
-
-    /**
-      * Performs the specified action for each element in an array.
-      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    forEach(callbackfn: (value: number, index: number, array: Float64Array) => void, thisArg?: any): void;
-
-    /**
-      * Returns the index of the first occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      *  search starts at index 0.
-      */
-    indexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * Adds all the elements of an array separated by the specified separator string.
-      * @param separator A string used to separate one element of an array from the next in the
-      * resulting String. If omitted, the array elements are separated with a comma.
-      */
-    join(separator?: string): string;
-
-    /**
-      * Returns the index of the last occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      * search starts at index 0.
-      */
-    lastIndexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * The length of the array.
-      */
-    readonly length: number;
-
-    /**
-      * Calls a defined callback function on each element of an array, and returns an array that
-      * contains the results.
-      * @param callbackfn A function that accepts up to three arguments. The map method calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    map(callbackfn: (value: number, index: number, array: Float64Array) => number, thisArg?: any): Float64Array;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Float64Array) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Float64Array) => U, initialValue: U): U;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an
-      * argument instead of an array value.
-      */
-    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Float64Array) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Float64Array) => U, initialValue: U): U;
-
-    /**
-      * Reverses the elements in an Array.
-      */
-    reverse(): Float64Array;
-
-    /**
-      * Sets a value or an array of values.
-      * @param index The index of the location to set.
-      * @param value The value to set.
-      */
-    set(index: number, value: number): void;
-
-    /**
-      * Sets a value or an array of values.
-      * @param array A typed or untyped array of values to set.
-      * @param offset The index in the current array at which the values are to be written.
-      */
-    set(array: ArrayLike<number>, offset?: number): void;
-
-    /**
-      * Returns a section of an array.
-      * @param start The beginning of the specified portion of the array.
-      * @param end The end of the specified portion of the array.
-      */
-    slice(start?: number, end?: number): Float64Array;
-
-    /**
-      * Determines whether the specified callback function returns true for any element of an array.
-      * @param callbackfn A function that accepts up to three arguments. The some method calls the
-      * callbackfn function for each element in array1 until the callbackfn returns true, or until
-      * the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    some(callbackfn: (value: number, index: number, array: Float64Array) => boolean, thisArg?: any): boolean;
-
-    /**
-      * Sorts an array.
-      * @param compareFn The name of the function used to determine the order of the elements. If
-      * omitted, the elements are sorted in ascending, ASCII character order.
-      */
-    sort(compareFn?: (a: number, b: number) => number): this;
-
-    /**
-      * Gets a new Float64Array view of the ArrayBuffer store for this array, referencing the elements
-      * at begin, inclusive, up to end, exclusive.
-      * @param begin The index of the beginning of the array.
-      * @param end The index of the end of the array.
-      */
-    subarray(begin: number, end?: number): Float64Array;
-
-    /**
-      * Converts a number to a string by using the current locale.
-      */
-    toLocaleString(): string;
-
-    /**
-      * Returns a string representation of an array.
-      */
-    toString(): string;
-
-    [index: number]: number;
-}
-
-interface Float64ArrayConstructor {
-    readonly prototype: Float64Array;
-    new (length: number): Float64Array;
-    new (array: ArrayLike<number>): Float64Array;
-    new (buffer: ArrayBuffer, byteOffset?: number, length?: number): Float64Array;
-
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * Returns a new array from a set of elements.
-      * @param items A set of elements to include in the new array object.
-      */
-    of(...items: number[]): Float64Array;
-
-    /**
-      * Creates an array from an array-like or iterable object.
-      * @param arrayLike An array-like or iterable object to convert to an array.
-      * @param mapfn A mapping function to call on every element of the array.
-      * @param thisArg Value of 'this' used to invoke the mapfn.
-      */
-    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Float64Array;
-}
-declare const Float64Array: Float64ArrayConstructor;
-
-/////////////////////////////
-/// ECMAScript Internationalization API
-/////////////////////////////
-
-declare module Intl {
-    interface CollatorOptions {
-        usage?: string;
-        localeMatcher?: string;
-        numeric?: boolean;
-        caseFirst?: string;
-        sensitivity?: string;
-        ignorePunctuation?: boolean;
-    }
-
-    interface ResolvedCollatorOptions {
-        locale: string;
-        usage: string;
-        sensitivity: string;
-        ignorePunctuation: boolean;
-        collation: string;
-        caseFirst: string;
-        numeric: boolean;
-    }
-
-    interface Collator {
-        compare(x: string, y: string): number;
-        resolvedOptions(): ResolvedCollatorOptions;
-    }
-    var Collator: {
-        new (locales?: string | string[], options?: CollatorOptions): Collator;
-        (locales?: string | string[], options?: CollatorOptions): Collator;
-        supportedLocalesOf(locales: string | string[], options?: CollatorOptions): string[];
-    }
-
-    interface NumberFormatOptions {
-        localeMatcher?: string;
-        style?: string;
-        currency?: string;
-        currencyDisplay?: string;
-        useGrouping?: boolean;
-        minimumIntegerDigits?: number;
-        minimumFractionDigits?: number;
-        maximumFractionDigits?: number;
-        minimumSignificantDigits?: number;
-        maximumSignificantDigits?: number;
-    }
-
-    interface ResolvedNumberFormatOptions {
-        locale: string;
-        numberingSystem: string;
-        style: string;
-        currency?: string;
-        currencyDisplay?: string;
-        minimumIntegerDigits: number;
-        minimumFractionDigits: number;
-        maximumFractionDigits: number;
-        minimumSignificantDigits?: number;
-        maximumSignificantDigits?: number;
-        useGrouping: boolean;
-    }
-
-    interface NumberFormat {
-        format(value: number): string;
-        resolvedOptions(): ResolvedNumberFormatOptions;
-    }
-    var NumberFormat: {
-        new (locales?: string | string[], options?: NumberFormatOptions): NumberFormat;
-        (locales?: string | string[], options?: NumberFormatOptions): NumberFormat;
-        supportedLocalesOf(locales: string | string[], options?: NumberFormatOptions): string[];
-    }
-
-    interface DateTimeFormatOptions {
-        localeMatcher?: string;
-        weekday?: string;
-        era?: string;
-        year?: string;
-        month?: string;
-        day?: string;
-        hour?: string;
-        minute?: string;
-        second?: string;
-        timeZoneName?: string;
-        formatMatcher?: string;
-        hour12?: boolean;
-        timeZone?: string;
-    }
-
-    interface ResolvedDateTimeFormatOptions {
-        locale: string;
-        calendar: string;
-        numberingSystem: string;
-        timeZone: string;
-        hour12?: boolean;
-        weekday?: string;
-        era?: string;
-        year?: string;
-        month?: string;
-        day?: string;
-        hour?: string;
-        minute?: string;
-        second?: string;
-        timeZoneName?: string;
-    }
-
-    interface DateTimeFormat {
-        format(date?: Date | number): string;
-        resolvedOptions(): ResolvedDateTimeFormatOptions;
-    }
-    var DateTimeFormat: {
-        new (locales?: string | string[], options?: DateTimeFormatOptions): DateTimeFormat;
-        (locales?: string | string[], options?: DateTimeFormatOptions): DateTimeFormat;
-        supportedLocalesOf(locales: string | string[], options?: DateTimeFormatOptions): string[];
-    }
-}
-
-interface String {
-    /**
-      * Determines whether two strings are equivalent in the current or specified locale.
-      * @param that String to compare to target string
-      * @param locales A locale string or array of locale strings that contain one or more language or locale tags. If you include more than one locale string, list them in descending order of priority so that the first entry is the preferred locale. If you omit this parameter, the default locale of the JavaScript runtime is used. This parameter must conform to BCP 47 standards; see the Intl.Collator object for details.
-      * @param options An object that contains one or more properties that specify comparison options. see the Intl.Collator object for details.
-      */
-    localeCompare(that: string, locales?: string | string[], options?: Intl.CollatorOptions): number;
-}
-
-interface Number {
-    /**
-      * Converts a number to a string by using the current or specified locale.
-      * @param locales A locale string or array of locale strings that contain one or more language or locale tags. If you include more than one locale string, list them in descending order of priority so that the first entry is the preferred locale. If you omit this parameter, the default locale of the JavaScript runtime is used.
-      * @param options An object that contains one or more properties that specify comparison options.
-      */
-    toLocaleString(locales?: string | string[], options?: Intl.NumberFormatOptions): string;
-}
-
-interface Date {
-    /**
-      * Converts a date and time to a string by using the current or specified locale.
-      * @param locales A locale string or array of locale strings that contain one or more language or locale tags. If you include more than one locale string, list them in descending order of priority so that the first entry is the preferred locale. If you omit this parameter, the default locale of the JavaScript runtime is used.
-      * @param options An object that contains one or more properties that specify comparison options.
-      */
-    toLocaleString(locales?: string | string[], options?: Intl.DateTimeFormatOptions): string;
-    /**
-      * Converts a date to a string by using the current or specified locale.
-      * @param locales A locale string or array of locale strings that contain one or more language or locale tags. If you include more than one locale string, list them in descending order of priority so that the first entry is the preferred locale. If you omit this parameter, the default locale of the JavaScript runtime is used.
-      * @param options An object that contains one or more properties that specify comparison options.
-      */
-    toLocaleDateString(locales?: string | string[], options?: Intl.DateTimeFormatOptions): string;
-
-    /**
-      * Converts a time to a string by using the current or specified locale.
-      * @param locales A locale string or array of locale strings that contain one or more language or locale tags. If you include more than one locale string, list them in descending order of priority so that the first entry is the preferred locale. If you omit this parameter, the default locale of the JavaScript runtime is used.
-      * @param options An object that contains one or more properties that specify comparison options.
-      */
-    toLocaleTimeString(locales?: string | string[], options?: Intl.DateTimeFormatOptions): string;
-}
-
-/////////////////////////////
-/// IE DOM APIs
-/////////////////////////////
-
-interface Algorithm {
-    name: string;
-}
-
-interface AriaRequestEventInit extends EventInit {
-    attributeName?: string;
-    attributeValue?: string;
-}
-
-interface CommandEventInit extends EventInit {
-    commandName?: string;
-    detail?: string;
-}
-
-interface CompositionEventInit extends UIEventInit {
-    data?: string;
-}
-
-interface ConfirmSiteSpecificExceptionsInformation extends ExceptionInformation {
-    arrayOfDomainStrings?: string[];
-}
-
-interface ConstrainBooleanParameters {
-    exact?: boolean;
-    ideal?: boolean;
-}
-
-interface ConstrainDOMStringParameters {
-    exact?: string | string[];
-    ideal?: string | string[];
-}
-
-interface ConstrainDoubleRange extends DoubleRange {
-    exact?: number;
-    ideal?: number;
-}
-
-interface ConstrainLongRange extends LongRange {
-    exact?: number;
-    ideal?: number;
-}
-
-interface ConstrainVideoFacingModeParameters {
-    exact?: string | string[];
-    ideal?: string | string[];
-}
-
-interface CustomEventInit extends EventInit {
-    detail?: any;
-}
-
-interface DeviceAccelerationDict {
-    x?: number;
-    y?: number;
-    z?: number;
-}
-
-interface DeviceLightEventInit extends EventInit {
-    value?: number;
-}
-
-interface DeviceRotationRateDict {
-    alpha?: number;
-    beta?: number;
-    gamma?: number;
-}
-
-interface DoubleRange {
-    max?: number;
-    min?: number;
-}
-
-interface EventInit {
-    bubbles?: boolean;
-    cancelable?: boolean;
-}
-
-interface EventModifierInit extends UIEventInit {
-    ctrlKey?: boolean;
-    shiftKey?: boolean;
-    altKey?: boolean;
-    metaKey?: boolean;
-    modifierAltGraph?: boolean;
-    modifierCapsLock?: boolean;
-    modifierFn?: boolean;
-    modifierFnLock?: boolean;
-    modifierHyper?: boolean;
-    modifierNumLock?: boolean;
-    modifierOS?: boolean;
-    modifierScrollLock?: boolean;
-    modifierSuper?: boolean;
-    modifierSymbol?: boolean;
-    modifierSymbolLock?: boolean;
-}
-
-interface ExceptionInformation {
-    domain?: string;
-}
-
-interface FocusEventInit extends UIEventInit {
-    relatedTarget?: EventTarget;
-}
-
-interface HashChangeEventInit extends EventInit {
-    newURL?: string;
-    oldURL?: string;
-}
-
-interface IDBIndexParameters {
-    multiEntry?: boolean;
-    unique?: boolean;
-}
-
-interface IDBObjectStoreParameters {
-    autoIncrement?: boolean;
-    keyPath?: IDBKeyPath;
-}
-
-interface KeyAlgorithm {
-    name?: string;
-}
-
-interface KeyboardEventInit extends EventModifierInit {
-    code?: string;
-    key?: string;
-    location?: number;
-    repeat?: boolean;
-}
-
-interface LongRange {
-    max?: number;
-    min?: number;
-}
-
-interface MSAccountInfo {
-    rpDisplayName?: string;
-    userDisplayName?: string;
-    accountName?: string;
-    userId?: string;
-    accountImageUri?: string;
-}
-
-interface MSAudioLocalClientEvent extends MSLocalClientEventBase {
-    networkSendQualityEventRatio?: number;
-    networkDelayEventRatio?: number;
-    cpuInsufficientEventRatio?: number;
-    deviceHalfDuplexAECEventRatio?: number;
-    deviceRenderNotFunctioningEventRatio?: number;
-    deviceCaptureNotFunctioningEventRatio?: number;
-    deviceGlitchesEventRatio?: number;
-    deviceLowSNREventRatio?: number;
-    deviceLowSpeechLevelEventRatio?: number;
-    deviceClippingEventRatio?: number;
-    deviceEchoEventRatio?: number;
-    deviceNearEndToEchoRatioEventRatio?: number;
-    deviceRenderZeroVolumeEventRatio?: number;
-    deviceRenderMuteEventRatio?: number;
-    deviceMultipleEndpointsEventCount?: number;
-    deviceHowlingEventCount?: number;
-}
-
-interface MSAudioRecvPayload extends MSPayloadBase {
-    samplingRate?: number;
-    signal?: MSAudioRecvSignal;
-    packetReorderRatio?: number;
-    packetReorderDepthAvg?: number;
-    packetReorderDepthMax?: number;
-    burstLossLength1?: number;
-    burstLossLength2?: number;
-    burstLossLength3?: number;
-    burstLossLength4?: number;
-    burstLossLength5?: number;
-    burstLossLength6?: number;
-    burstLossLength7?: number;
-    burstLossLength8OrHigher?: number;
-    fecRecvDistance1?: number;
-    fecRecvDistance2?: number;
-    fecRecvDistance3?: number;
-    ratioConcealedSamplesAvg?: number;
-    ratioStretchedSamplesAvg?: number;
-    ratioCompressedSamplesAvg?: number;
-}
-
-interface MSAudioRecvSignal {
-    initialSignalLevelRMS?: number;
-    recvSignalLevelCh1?: number;
-    recvNoiseLevelCh1?: number;
-    renderSignalLevel?: number;
-    renderNoiseLevel?: number;
-    renderLoopbackSignalLevel?: number;
-}
-
-interface MSAudioSendPayload extends MSPayloadBase {
-    samplingRate?: number;
-    signal?: MSAudioSendSignal;
-    audioFECUsed?: boolean;
-    sendMutePercent?: number;
-}
-
-interface MSAudioSendSignal {
-    noiseLevel?: number;
-    sendSignalLevelCh1?: number;
-    sendNoiseLevelCh1?: number;
-}
-
-interface MSConnectivity {
-    iceType?: string;
-    iceWarningFlags?: MSIceWarningFlags;
-    relayAddress?: MSRelayAddress;
-}
-
-interface MSCredentialFilter {
-    accept?: MSCredentialSpec[];
-}
-
-interface MSCredentialParameters {
-    type?: string;
-}
-
-interface MSCredentialSpec {
-    type?: string;
-    id?: string;
-}
-
-interface MSDelay {
-    roundTrip?: number;
-    roundTripMax?: number;
-}
-
-interface MSDescription extends RTCStats {
-    connectivity?: MSConnectivity;
-    transport?: string;
-    networkconnectivity?: MSNetworkConnectivityInfo;
-    localAddr?: MSIPAddressInfo;
-    remoteAddr?: MSIPAddressInfo;
-    deviceDevName?: string;
-    reflexiveLocalIPAddr?: MSIPAddressInfo;
-}
-
-interface MSFIDOCredentialParameters extends MSCredentialParameters {
-    algorithm?: string | Algorithm;
-    authenticators?: AAGUID[];
-}
-
-interface MSIPAddressInfo {
-    ipAddr?: string;
-    port?: number;
-    manufacturerMacAddrMask?: string;
-}
-
-interface MSIceWarningFlags {
-    turnTcpTimedOut?: boolean;
-    turnUdpAllocateFailed?: boolean;
-    turnUdpSendFailed?: boolean;
-    turnTcpAllocateFailed?: boolean;
-    turnTcpSendFailed?: boolean;
-    udpLocalConnectivityFailed?: boolean;
-    udpNatConnectivityFailed?: boolean;
-    udpRelayConnectivityFailed?: boolean;
-    tcpNatConnectivityFailed?: boolean;
-    tcpRelayConnectivityFailed?: boolean;
-    connCheckMessageIntegrityFailed?: boolean;
-    allocationMessageIntegrityFailed?: boolean;
-    connCheckOtherError?: boolean;
-    turnAuthUnknownUsernameError?: boolean;
-    noRelayServersConfigured?: boolean;
-    multipleRelayServersAttempted?: boolean;
-    portRangeExhausted?: boolean;
-    alternateServerReceived?: boolean;
-    pseudoTLSFailure?: boolean;
-    turnTurnTcpConnectivityFailed?: boolean;
-    useCandidateChecksFailed?: boolean;
-    fipsAllocationFailure?: boolean;
-}
-
-interface MSJitter {
-    interArrival?: number;
-    interArrivalMax?: number;
-    interArrivalSD?: number;
-}
-
-interface MSLocalClientEventBase extends RTCStats {
-    networkReceiveQualityEventRatio?: number;
-    networkBandwidthLowEventRatio?: number;
-}
-
-interface MSNetwork extends RTCStats {
-    jitter?: MSJitter;
-    delay?: MSDelay;
-    packetLoss?: MSPacketLoss;
-    utilization?: MSUtilization;
-}
-
-interface MSNetworkConnectivityInfo {
-    vpn?: boolean;
-    linkspeed?: number;
-    networkConnectionDetails?: string;
-}
-
-interface MSNetworkInterfaceType {
-    interfaceTypeEthernet?: boolean;
-    interfaceTypeWireless?: boolean;
-    interfaceTypePPP?: boolean;
-    interfaceTypeTunnel?: boolean;
-    interfaceTypeWWAN?: boolean;
-}
-
-interface MSOutboundNetwork extends MSNetwork {
-    appliedBandwidthLimit?: number;
-}
-
-interface MSPacketLoss {
-    lossRate?: number;
-    lossRateMax?: number;
-}
-
-interface MSPayloadBase extends RTCStats {
-    payloadDescription?: string;
-}
-
-interface MSRelayAddress {
-    relayAddress?: string;
-    port?: number;
-}
-
-interface MSSignatureParameters {
-    userPrompt?: string;
-}
-
-interface MSTransportDiagnosticsStats extends RTCStats {
-    baseAddress?: string;
-    localAddress?: string;
-    localSite?: string;
-    networkName?: string;
-    remoteAddress?: string;
-    remoteSite?: string;
-    localMR?: string;
-    remoteMR?: string;
-    iceWarningFlags?: MSIceWarningFlags;
-    portRangeMin?: number;
-    portRangeMax?: number;
-    localMRTCPPort?: number;
-    remoteMRTCPPort?: number;
-    stunVer?: number;
-    numConsentReqSent?: number;
-    numConsentReqReceived?: number;
-    numConsentRespSent?: number;
-    numConsentRespReceived?: number;
-    interfaces?: MSNetworkInterfaceType;
-    baseInterface?: MSNetworkInterfaceType;
-    protocol?: string;
-    localInterface?: MSNetworkInterfaceType;
-    localAddrType?: string;
-    remoteAddrType?: string;
-    iceRole?: string;
-    rtpRtcpMux?: boolean;
-    allocationTimeInMs?: number;
-    msRtcEngineVersion?: string;
-}
-
-interface MSUtilization {
-    packets?: number;
-    bandwidthEstimation?: number;
-    bandwidthEstimationMin?: number;
-    bandwidthEstimationMax?: number;
-    bandwidthEstimationStdDev?: number;
-    bandwidthEstimationAvg?: number;
-}
-
-interface MSVideoPayload extends MSPayloadBase {
-    resoluton?: string;
-    videoBitRateAvg?: number;
-    videoBitRateMax?: number;
-    videoFrameRateAvg?: number;
-    videoPacketLossRate?: number;
-    durationSeconds?: number;
-}
-
-interface MSVideoRecvPayload extends MSVideoPayload {
-    videoFrameLossRate?: number;
-    recvCodecType?: string;
-    recvResolutionWidth?: number;
-    recvResolutionHeight?: number;
-    videoResolutions?: MSVideoResolutionDistribution;
-    recvFrameRateAverage?: number;
-    recvBitRateMaximum?: number;
-    recvBitRateAverage?: number;
-    recvVideoStreamsMax?: number;
-    recvVideoStreamsMin?: number;
-    recvVideoStreamsMode?: number;
-    videoPostFECPLR?: number;
-    lowBitRateCallPercent?: number;
-    lowFrameRateCallPercent?: number;
-    reorderBufferTotalPackets?: number;
-    recvReorderBufferReorderedPackets?: number;
-    recvReorderBufferPacketsDroppedDueToBufferExhaustion?: number;
-    recvReorderBufferMaxSuccessfullyOrderedExtent?: number;
-    recvReorderBufferMaxSuccessfullyOrderedLateTime?: number;
-    recvReorderBufferPacketsDroppedDueToTimeout?: number;
-    recvFpsHarmonicAverage?: number;
-    recvNumResSwitches?: number;
-}
-
-interface MSVideoResolutionDistribution {
-    cifQuality?: number;
-    vgaQuality?: number;
-    h720Quality?: number;
-    h1080Quality?: number;
-    h1440Quality?: number;
-    h2160Quality?: number;
-}
-
-interface MSVideoSendPayload extends MSVideoPayload {
-    sendFrameRateAverage?: number;
-    sendBitRateMaximum?: number;
-    sendBitRateAverage?: number;
-    sendVideoStreamsMax?: number;
-    sendResolutionWidth?: number;
-    sendResolutionHeight?: number;
-}
-
-interface MediaEncryptedEventInit extends EventInit {
-    initDataType?: string;
-    initData?: ArrayBuffer;
-}
-
-interface MediaKeyMessageEventInit extends EventInit {
-    messageType?: string;
-    message?: ArrayBuffer;
-}
-
-interface MediaKeySystemConfiguration {
-    initDataTypes?: string[];
-    audioCapabilities?: MediaKeySystemMediaCapability[];
-    videoCapabilities?: MediaKeySystemMediaCapability[];
-    distinctiveIdentifier?: string;
-    persistentState?: string;
-}
-
-interface MediaKeySystemMediaCapability {
-    contentType?: string;
-    robustness?: string;
-}
-
-interface MediaStreamConstraints {
-    video?: boolean | MediaTrackConstraints;
-    audio?: boolean | MediaTrackConstraints;
-}
-
-interface MediaStreamErrorEventInit extends EventInit {
-    error?: MediaStreamError;
-}
-
-interface MediaStreamTrackEventInit extends EventInit {
-    track?: MediaStreamTrack;
-}
-
-interface MediaTrackCapabilities {
-    width?: number | LongRange;
-    height?: number | LongRange;
-    aspectRatio?: number | DoubleRange;
-    frameRate?: number | DoubleRange;
-    facingMode?: string;
-    volume?: number | DoubleRange;
-    sampleRate?: number | LongRange;
-    sampleSize?: number | LongRange;
-    echoCancellation?: boolean[];
-    deviceId?: string;
-    groupId?: string;
-}
-
-interface MediaTrackConstraintSet {
-    width?: number | ConstrainLongRange;
-    height?: number | ConstrainLongRange;
-    aspectRatio?: number | ConstrainDoubleRange;
-    frameRate?: number | ConstrainDoubleRange;
-    facingMode?: string | string[] | ConstrainDOMStringParameters;
-    volume?: number | ConstrainDoubleRange;
-    sampleRate?: number | ConstrainLongRange;
-    sampleSize?: number | ConstrainLongRange;
-    echoCancelation?: boolean | ConstrainBooleanParameters;
-    deviceId?: string | string[] | ConstrainDOMStringParameters;
-    groupId?: string | string[] | ConstrainDOMStringParameters;
-}
-
-interface MediaTrackConstraints extends MediaTrackConstraintSet {
-    advanced?: MediaTrackConstraintSet[];
-}
-
-interface MediaTrackSettings {
-    width?: number;
-    height?: number;
-    aspectRatio?: number;
-    frameRate?: number;
-    facingMode?: string;
-    volume?: number;
-    sampleRate?: number;
-    sampleSize?: number;
-    echoCancellation?: boolean;
-    deviceId?: string;
-    groupId?: string;
-}
-
-interface MediaTrackSupportedConstraints {
-    width?: boolean;
-    height?: boolean;
-    aspectRatio?: boolean;
-    frameRate?: boolean;
-    facingMode?: boolean;
-    volume?: boolean;
-    sampleRate?: boolean;
-    sampleSize?: boolean;
-    echoCancellation?: boolean;
-    deviceId?: boolean;
-    groupId?: boolean;
-}
-
-interface MouseEventInit extends EventModifierInit {
-    screenX?: number;
-    screenY?: number;
-    clientX?: number;
-    clientY?: number;
-    button?: number;
-    buttons?: number;
-    relatedTarget?: EventTarget;
-}
-
-interface MsZoomToOptions {
-    contentX?: number;
-    contentY?: number;
-    viewportX?: string;
-    viewportY?: string;
-    scaleFactor?: number;
-    animate?: string;
-}
-
-interface MutationObserverInit {
-    childList?: boolean;
-    attributes?: boolean;
-    characterData?: boolean;
-    subtree?: boolean;
-    attributeOldValue?: boolean;
-    characterDataOldValue?: boolean;
-    attributeFilter?: string[];
-}
-
-interface ObjectURLOptions {
-    oneTimeOnly?: boolean;
-}
-
-interface PeriodicWaveConstraints {
-    disableNormalization?: boolean;
-}
-
-interface PointerEventInit extends MouseEventInit {
-    pointerId?: number;
-    width?: number;
-    height?: number;
-    pressure?: number;
-    tiltX?: number;
-    tiltY?: number;
-    pointerType?: string;
-    isPrimary?: boolean;
-}
-
-interface PositionOptions {
-    enableHighAccuracy?: boolean;
-    timeout?: number;
-    maximumAge?: number;
-}
-
-interface RTCDTMFToneChangeEventInit extends EventInit {
-    tone?: string;
-}
-
-interface RTCDtlsFingerprint {
-    algorithm?: string;
-    value?: string;
-}
-
-interface RTCDtlsParameters {
-    role?: string;
-    fingerprints?: RTCDtlsFingerprint[];
-}
-
-interface RTCIceCandidate {
-    foundation?: string;
-    priority?: number;
-    ip?: string;
-    protocol?: string;
-    port?: number;
-    type?: string;
-    tcpType?: string;
-    relatedAddress?: string;
-    relatedPort?: number;
-}
-
-interface RTCIceCandidateAttributes extends RTCStats {
-    ipAddress?: string;
-    portNumber?: number;
-    transport?: string;
-    candidateType?: string;
-    priority?: number;
-    addressSourceUrl?: string;
-}
-
-interface RTCIceCandidateComplete {
-}
-
-interface RTCIceCandidatePair {
-    local?: RTCIceCandidate;
-    remote?: RTCIceCandidate;
-}
-
-interface RTCIceCandidatePairStats extends RTCStats {
-    transportId?: string;
-    localCandidateId?: string;
-    remoteCandidateId?: string;
-    state?: string;
-    priority?: number;
-    nominated?: boolean;
-    writable?: boolean;
-    readable?: boolean;
-    bytesSent?: number;
-    bytesReceived?: number;
-    roundTripTime?: number;
-    availableOutgoingBitrate?: number;
-    availableIncomingBitrate?: number;
-}
-
-interface RTCIceGatherOptions {
-    gatherPolicy?: string;
-    iceservers?: RTCIceServer[];
-}
-
-interface RTCIceParameters {
-    usernameFragment?: string;
-    password?: string;
-}
-
-interface RTCIceServer {
-    urls?: any;
-    username?: string;
-    credential?: string;
-}
-
-interface RTCInboundRTPStreamStats extends RTCRTPStreamStats {
-    packetsReceived?: number;
-    bytesReceived?: number;
-    packetsLost?: number;
-    jitter?: number;
-    fractionLost?: number;
-}
-
-interface RTCMediaStreamTrackStats extends RTCStats {
-    trackIdentifier?: string;
-    remoteSource?: boolean;
-    ssrcIds?: string[];
-    frameWidth?: number;
-    frameHeight?: number;
-    framesPerSecond?: number;
-    framesSent?: number;
-    framesReceived?: number;
-    framesDecoded?: number;
-    framesDropped?: number;
-    framesCorrupted?: number;
-    audioLevel?: number;
-    echoReturnLoss?: number;
-    echoReturnLossEnhancement?: number;
-}
-
-interface RTCOutboundRTPStreamStats extends RTCRTPStreamStats {
-    packetsSent?: number;
-    bytesSent?: number;
-    targetBitrate?: number;
-    roundTripTime?: number;
-}
-
-interface RTCRTPStreamStats extends RTCStats {
-    ssrc?: string;
-    associateStatsId?: string;
-    isRemote?: boolean;
-    mediaTrackId?: string;
-    transportId?: string;
-    codecId?: string;
-    firCount?: number;
-    pliCount?: number;
-    nackCount?: number;
-    sliCount?: number;
-}
-
-interface RTCRtcpFeedback {
-    type?: string;
-    parameter?: string;
-}
-
-interface RTCRtcpParameters {
-    ssrc?: number;
-    cname?: string;
-    reducedSize?: boolean;
-    mux?: boolean;
-}
-
-interface RTCRtpCapabilities {
-    codecs?: RTCRtpCodecCapability[];
-    headerExtensions?: RTCRtpHeaderExtension[];
-    fecMechanisms?: string[];
-}
-
-interface RTCRtpCodecCapability {
-    name?: string;
-    kind?: string;
-    clockRate?: number;
-    preferredPayloadType?: number;
-    maxptime?: number;
-    numChannels?: number;
-    rtcpFeedback?: RTCRtcpFeedback[];
-    parameters?: any;
-    options?: any;
-    maxTemporalLayers?: number;
-    maxSpatialLayers?: number;
-    svcMultiStreamSupport?: boolean;
-}
-
-interface RTCRtpCodecParameters {
-    name?: string;
-    payloadType?: any;
-    clockRate?: number;
-    maxptime?: number;
-    numChannels?: number;
-    rtcpFeedback?: RTCRtcpFeedback[];
-    parameters?: any;
-}
-
-interface RTCRtpContributingSource {
-    timestamp?: number;
-    csrc?: number;
-    audioLevel?: number;
-}
-
-interface RTCRtpEncodingParameters {
-    ssrc?: number;
-    codecPayloadType?: number;
-    fec?: RTCRtpFecParameters;
-    rtx?: RTCRtpRtxParameters;
-    priority?: number;
-    maxBitrate?: number;
-    minQuality?: number;
-    framerateBias?: number;
-    resolutionScale?: number;
-    framerateScale?: number;
-    active?: boolean;
-    encodingId?: string;
-    dependencyEncodingIds?: string[];
-    ssrcRange?: RTCSsrcRange;
-}
-
-interface RTCRtpFecParameters {
-    ssrc?: number;
-    mechanism?: string;
-}
-
-interface RTCRtpHeaderExtension {
-    kind?: string;
-    uri?: string;
-    preferredId?: number;
-    preferredEncrypt?: boolean;
-}
-
-interface RTCRtpHeaderExtensionParameters {
-    uri?: string;
-    id?: number;
-    encrypt?: boolean;
-}
-
-interface RTCRtpParameters {
-    muxId?: string;
-    codecs?: RTCRtpCodecParameters[];
-    headerExtensions?: RTCRtpHeaderExtensionParameters[];
-    encodings?: RTCRtpEncodingParameters[];
-    rtcp?: RTCRtcpParameters;
-}
-
-interface RTCRtpRtxParameters {
-    ssrc?: number;
-}
-
-interface RTCRtpUnhandled {
-    ssrc?: number;
-    payloadType?: number;
-    muxId?: string;
-}
-
-interface RTCSrtpKeyParam {
-    keyMethod?: string;
-    keySalt?: string;
-    lifetime?: string;
-    mkiValue?: number;
-    mkiLength?: number;
-}
-
-interface RTCSrtpSdesParameters {
-    tag?: number;
-    cryptoSuite?: string;
-    keyParams?: RTCSrtpKeyParam[];
-    sessionParams?: string[];
-}
-
-interface RTCSsrcRange {
-    min?: number;
-    max?: number;
-}
-
-interface RTCStats {
-    timestamp?: number;
-    type?: string;
-    id?: string;
-    msType?: string;
-}
-
-interface RTCStatsReport {
-}
-
-interface RTCTransportStats extends RTCStats {
-    bytesSent?: number;
-    bytesReceived?: number;
-    rtcpTransportStatsId?: string;
-    activeConnection?: boolean;
-    selectedCandidatePairId?: string;
-    localCertificateId?: string;
-    remoteCertificateId?: string;
-}
-
-interface StoreExceptionsInformation extends ExceptionInformation {
-    siteName?: string;
-    explanationString?: string;
-    detailURI?: string;
-}
-
-interface StoreSiteSpecificExceptionsInformation extends StoreExceptionsInformation {
-    arrayOfDomainStrings?: string[];
-}
-
-interface UIEventInit extends EventInit {
-    view?: Window;
-    detail?: number;
-}
-
-interface WebGLContextAttributes {
-    failIfMajorPerformanceCaveat?: boolean;
-    alpha?: boolean;
-    depth?: boolean;
-    stencil?: boolean;
-    antialias?: boolean;
-    premultipliedAlpha?: boolean;
-    preserveDrawingBuffer?: boolean;
-}
-
-interface WebGLContextEventInit extends EventInit {
-    statusMessage?: string;
-}
-
-interface WheelEventInit extends MouseEventInit {
-    deltaX?: number;
-    deltaY?: number;
-    deltaZ?: number;
-    deltaMode?: number;
-}
-
-interface EventListener {
-    (evt: Event): void;
-}
-
-interface ANGLE_instanced_arrays {
-    drawArraysInstancedANGLE(mode: number, first: number, count: number, primcount: number): void;
-    drawElementsInstancedANGLE(mode: number, count: number, type: number, offset: number, primcount: number): void;
-    vertexAttribDivisorANGLE(index: number, divisor: number): void;
-    readonly VERTEX_ATTRIB_ARRAY_DIVISOR_ANGLE: number;
-}
-
-declare var ANGLE_instanced_arrays: {
-    prototype: ANGLE_instanced_arrays;
-    new(): ANGLE_instanced_arrays;
-    readonly VERTEX_ATTRIB_ARRAY_DIVISOR_ANGLE: number;
-}
-
-interface AnalyserNode extends AudioNode {
-    fftSize: number;
-    readonly frequencyBinCount: number;
-    maxDecibels: number;
-    minDecibels: number;
-    smoothingTimeConstant: number;
-    getByteFrequencyData(array: Uint8Array): void;
-    getByteTimeDomainData(array: Uint8Array): void;
-    getFloatFrequencyData(array: Float32Array): void;
-    getFloatTimeDomainData(array: Float32Array): void;
-}
-
-declare var AnalyserNode: {
-    prototype: AnalyserNode;
-    new(): AnalyserNode;
-}
-
-interface AnimationEvent extends Event {
-    readonly animationName: string;
-    readonly elapsedTime: number;
-    initAnimationEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, animationNameArg: string, elapsedTimeArg: number): void;
-}
-
-declare var AnimationEvent: {
-    prototype: AnimationEvent;
-    new(): AnimationEvent;
-}
-
-interface ApplicationCache extends EventTarget {
-    oncached: (this: this, ev: Event) => any;
-    onchecking: (this: this, ev: Event) => any;
-    ondownloading: (this: this, ev: Event) => any;
-    onerror: (this: this, ev: ErrorEvent) => any;
-    onnoupdate: (this: this, ev: Event) => any;
-    onobsolete: (this: this, ev: Event) => any;
-    onprogress: (this: this, ev: ProgressEvent) => any;
-    onupdateready: (this: this, ev: Event) => any;
-    readonly status: number;
-    abort(): void;
-    swapCache(): void;
-    update(): void;
-    readonly CHECKING: number;
-    readonly DOWNLOADING: number;
-    readonly IDLE: number;
-    readonly OBSOLETE: number;
-    readonly UNCACHED: number;
-    readonly UPDATEREADY: number;
-    addEventListener(type: "cached", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "checking", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "downloading", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "noupdate", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "obsolete", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "progress", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "updateready", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var ApplicationCache: {
-    prototype: ApplicationCache;
-    new(): ApplicationCache;
-    readonly CHECKING: number;
-    readonly DOWNLOADING: number;
-    readonly IDLE: number;
-    readonly OBSOLETE: number;
-    readonly UNCACHED: number;
-    readonly UPDATEREADY: number;
-}
-
-interface AriaRequestEvent extends Event {
-    readonly attributeName: string;
-    attributeValue: string | null;
-}
-
-declare var AriaRequestEvent: {
-    prototype: AriaRequestEvent;
-    new(type: string, eventInitDict?: AriaRequestEventInit): AriaRequestEvent;
-}
-
-interface Attr extends Node {
-    readonly name: string;
-    readonly ownerElement: Element;
-    readonly prefix: string | null;
-    readonly specified: boolean;
-    value: string;
-}
-
-declare var Attr: {
-    prototype: Attr;
-    new(): Attr;
-}
-
-interface AudioBuffer {
-    readonly duration: number;
-    readonly length: number;
-    readonly numberOfChannels: number;
-    readonly sampleRate: number;
-    copyFromChannel(destination: Float32Array, channelNumber: number, startInChannel?: number): void;
-    copyToChannel(source: Float32Array, channelNumber: number, startInChannel?: number): void;
-    getChannelData(channel: number): Float32Array;
-}
-
-declare var AudioBuffer: {
-    prototype: AudioBuffer;
-    new(): AudioBuffer;
-}
-
-interface AudioBufferSourceNode extends AudioNode {
-    buffer: AudioBuffer | null;
-    readonly detune: AudioParam;
-    loop: boolean;
-    loopEnd: number;
-    loopStart: number;
-    onended: (this: this, ev: MediaStreamErrorEvent) => any;
-    readonly playbackRate: AudioParam;
-    start(when?: number, offset?: number, duration?: number): void;
-    stop(when?: number): void;
-    addEventListener(type: "ended", listener: (this: this, ev: MediaStreamErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var AudioBufferSourceNode: {
-    prototype: AudioBufferSourceNode;
-    new(): AudioBufferSourceNode;
-}
-
-interface AudioContext extends EventTarget {
-    readonly currentTime: number;
-    readonly destination: AudioDestinationNode;
-    readonly listener: AudioListener;
-    readonly sampleRate: number;
-    state: string;
-    createAnalyser(): AnalyserNode;
-    createBiquadFilter(): BiquadFilterNode;
-    createBuffer(numberOfChannels: number, length: number, sampleRate: number): AudioBuffer;
-    createBufferSource(): AudioBufferSourceNode;
-    createChannelMerger(numberOfInputs?: number): ChannelMergerNode;
-    createChannelSplitter(numberOfOutputs?: number): ChannelSplitterNode;
-    createConvolver(): ConvolverNode;
-    createDelay(maxDelayTime?: number): DelayNode;
-    createDynamicsCompressor(): DynamicsCompressorNode;
-    createGain(): GainNode;
-    createMediaElementSource(mediaElement: HTMLMediaElement): MediaElementAudioSourceNode;
-    createMediaStreamSource(mediaStream: MediaStream): MediaStreamAudioSourceNode;
-    createOscillator(): OscillatorNode;
-    createPanner(): PannerNode;
-    createPeriodicWave(real: Float32Array, imag: Float32Array, constraints?: PeriodicWaveConstraints): PeriodicWave;
-    createScriptProcessor(bufferSize?: number, numberOfInputChannels?: number, numberOfOutputChannels?: number): ScriptProcessorNode;
-    createStereoPanner(): StereoPannerNode;
-    createWaveShaper(): WaveShaperNode;
-    decodeAudioData(audioData: ArrayBuffer, successCallback?: DecodeSuccessCallback, errorCallback?: DecodeErrorCallback): PromiseLike<AudioBuffer>;
-}
-
-declare var AudioContext: {
-    prototype: AudioContext;
-    new(): AudioContext;
-}
-
-interface AudioDestinationNode extends AudioNode {
-    readonly maxChannelCount: number;
-}
-
-declare var AudioDestinationNode: {
-    prototype: AudioDestinationNode;
-    new(): AudioDestinationNode;
-}
-
-interface AudioListener {
-    dopplerFactor: number;
-    speedOfSound: number;
-    setOrientation(x: number, y: number, z: number, xUp: number, yUp: number, zUp: number): void;
-    setPosition(x: number, y: number, z: number): void;
-    setVelocity(x: number, y: number, z: number): void;
-}
-
-declare var AudioListener: {
-    prototype: AudioListener;
-    new(): AudioListener;
-}
-
-interface AudioNode extends EventTarget {
-    channelCount: number;
-    channelCountMode: string;
-    channelInterpretation: string;
-    readonly context: AudioContext;
-    readonly numberOfInputs: number;
-    readonly numberOfOutputs: number;
-    connect(destination: AudioNode, output?: number, input?: number): void;
-    disconnect(output?: number): void;
-    disconnect(destination: AudioNode, output?: number, input?: number): void;
-    disconnect(destination: AudioParam, output?: number): void;
-}
-
-declare var AudioNode: {
-    prototype: AudioNode;
-    new(): AudioNode;
-}
-
-interface AudioParam {
-    readonly defaultValue: number;
-    value: number;
-    cancelScheduledValues(startTime: number): void;
-    exponentialRampToValueAtTime(value: number, endTime: number): void;
-    linearRampToValueAtTime(value: number, endTime: number): void;
-    setTargetAtTime(target: number, startTime: number, timeConstant: number): void;
-    setValueAtTime(value: number, startTime: number): void;
-    setValueCurveAtTime(values: Float32Array, startTime: number, duration: number): void;
-}
-
-declare var AudioParam: {
-    prototype: AudioParam;
-    new(): AudioParam;
-}
-
-interface AudioProcessingEvent extends Event {
-    readonly inputBuffer: AudioBuffer;
-    readonly outputBuffer: AudioBuffer;
-    readonly playbackTime: number;
-}
-
-declare var AudioProcessingEvent: {
-    prototype: AudioProcessingEvent;
-    new(): AudioProcessingEvent;
-}
-
-interface AudioTrack {
-    enabled: boolean;
-    readonly id: string;
-    kind: string;
-    readonly label: string;
-    language: string;
-    readonly sourceBuffer: SourceBuffer;
-}
-
-declare var AudioTrack: {
-    prototype: AudioTrack;
-    new(): AudioTrack;
-}
-
-interface AudioTrackList extends EventTarget {
-    readonly length: number;
-    onaddtrack: (this: this, ev: TrackEvent) => any;
-    onchange: (this: this, ev: Event) => any;
-    onremovetrack: (this: this, ev: TrackEvent) => any;
-    getTrackById(id: string): AudioTrack | null;
-    item(index: number): AudioTrack;
-    addEventListener(type: "addtrack", listener: (this: this, ev: TrackEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "change", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "removetrack", listener: (this: this, ev: TrackEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-    [index: number]: AudioTrack;
-}
-
-declare var AudioTrackList: {
-    prototype: AudioTrackList;
-    new(): AudioTrackList;
-}
-
-interface BarProp {
-    readonly visible: boolean;
-}
-
-declare var BarProp: {
-    prototype: BarProp;
-    new(): BarProp;
-}
-
-interface BeforeUnloadEvent extends Event {
-    returnValue: any;
-}
-
-declare var BeforeUnloadEvent: {
-    prototype: BeforeUnloadEvent;
-    new(): BeforeUnloadEvent;
-}
-
-interface BiquadFilterNode extends AudioNode {
-    readonly Q: AudioParam;
-    readonly detune: AudioParam;
-    readonly frequency: AudioParam;
-    readonly gain: AudioParam;
-    type: string;
-    getFrequencyResponse(frequencyHz: Float32Array, magResponse: Float32Array, phaseResponse: Float32Array): void;
-}
-
-declare var BiquadFilterNode: {
-    prototype: BiquadFilterNode;
-    new(): BiquadFilterNode;
-}
-
-interface Blob {
-    readonly size: number;
-    readonly type: string;
-    msClose(): void;
-    msDetachStream(): any;
-    slice(start?: number, end?: number, contentType?: string): Blob;
-}
-
-declare var Blob: {
-    prototype: Blob;
-    new (blobParts?: any[], options?: BlobPropertyBag): Blob;
-}
-
-interface CDATASection extends Text {
-}
-
-declare var CDATASection: {
-    prototype: CDATASection;
-    new(): CDATASection;
-}
-
-interface CSS {
-    supports(property: string, value?: string): boolean;
-}
-declare var CSS: CSS;
-
-interface CSSConditionRule extends CSSGroupingRule {
-    conditionText: string;
-}
-
-declare var CSSConditionRule: {
-    prototype: CSSConditionRule;
-    new(): CSSConditionRule;
-}
-
-interface CSSFontFaceRule extends CSSRule {
-    readonly style: CSSStyleDeclaration;
-}
-
-declare var CSSFontFaceRule: {
-    prototype: CSSFontFaceRule;
-    new(): CSSFontFaceRule;
-}
-
-interface CSSGroupingRule extends CSSRule {
-    readonly cssRules: CSSRuleList;
-    deleteRule(index: number): void;
-    insertRule(rule: string, index: number): number;
-}
-
-declare var CSSGroupingRule: {
-    prototype: CSSGroupingRule;
-    new(): CSSGroupingRule;
-}
-
-interface CSSImportRule extends CSSRule {
-    readonly href: string;
-    readonly media: MediaList;
-    readonly styleSheet: CSSStyleSheet;
-}
-
-declare var CSSImportRule: {
-    prototype: CSSImportRule;
-    new(): CSSImportRule;
-}
-
-interface CSSKeyframeRule extends CSSRule {
-    keyText: string;
-    readonly style: CSSStyleDeclaration;
-}
-
-declare var CSSKeyframeRule: {
-    prototype: CSSKeyframeRule;
-    new(): CSSKeyframeRule;
-}
-
-interface CSSKeyframesRule extends CSSRule {
-    readonly cssRules: CSSRuleList;
-    name: string;
-    appendRule(rule: string): void;
-    deleteRule(rule: string): void;
-    findRule(rule: string): CSSKeyframeRule;
-}
-
-declare var CSSKeyframesRule: {
-    prototype: CSSKeyframesRule;
-    new(): CSSKeyframesRule;
-}
-
-interface CSSMediaRule extends CSSConditionRule {
-    readonly media: MediaList;
-}
-
-declare var CSSMediaRule: {
-    prototype: CSSMediaRule;
-    new(): CSSMediaRule;
-}
-
-interface CSSNamespaceRule extends CSSRule {
-    readonly namespaceURI: string;
-    readonly prefix: string;
-}
-
-declare var CSSNamespaceRule: {
-    prototype: CSSNamespaceRule;
-    new(): CSSNamespaceRule;
-}
-
-interface CSSPageRule extends CSSRule {
-    readonly pseudoClass: string;
-    readonly selector: string;
-    selectorText: string;
-    readonly style: CSSStyleDeclaration;
-}
-
-declare var CSSPageRule: {
-    prototype: CSSPageRule;
-    new(): CSSPageRule;
-}
-
-interface CSSRule {
-    cssText: string;
-    readonly parentRule: CSSRule;
-    readonly parentStyleSheet: CSSStyleSheet;
-    readonly type: number;
-    readonly CHARSET_RULE: number;
-    readonly FONT_FACE_RULE: number;
-    readonly IMPORT_RULE: number;
-    readonly KEYFRAMES_RULE: number;
-    readonly KEYFRAME_RULE: number;
-    readonly MEDIA_RULE: number;
-    readonly NAMESPACE_RULE: number;
-    readonly PAGE_RULE: number;
-    readonly STYLE_RULE: number;
-    readonly SUPPORTS_RULE: number;
-    readonly UNKNOWN_RULE: number;
-    readonly VIEWPORT_RULE: number;
-}
-
-declare var CSSRule: {
-    prototype: CSSRule;
-    new(): CSSRule;
-    readonly CHARSET_RULE: number;
-    readonly FONT_FACE_RULE: number;
-    readonly IMPORT_RULE: number;
-    readonly KEYFRAMES_RULE: number;
-    readonly KEYFRAME_RULE: number;
-    readonly MEDIA_RULE: number;
-    readonly NAMESPACE_RULE: number;
-    readonly PAGE_RULE: number;
-    readonly STYLE_RULE: number;
-    readonly SUPPORTS_RULE: number;
-    readonly UNKNOWN_RULE: number;
-    readonly VIEWPORT_RULE: number;
-}
-
-interface CSSRuleList {
-    readonly length: number;
-    item(index: number): CSSRule;
-    [index: number]: CSSRule;
-}
-
-declare var CSSRuleList: {
-    prototype: CSSRuleList;
-    new(): CSSRuleList;
-}
-
-interface CSSStyleDeclaration {
-    alignContent: string | null;
-    alignItems: string | null;
-    alignSelf: string | null;
-    alignmentBaseline: string | null;
-    animation: string | null;
-    animationDelay: string | null;
-    animationDirection: string | null;
-    animationDuration: string | null;
-    animationFillMode: string | null;
-    animationIterationCount: string | null;
-    animationName: string | null;
-    animationPlayState: string | null;
-    animationTimingFunction: string | null;
-    backfaceVisibility: string | null;
-    background: string | null;
-    backgroundAttachment: string | null;
-    backgroundClip: string | null;
-    backgroundColor: string | null;
-    backgroundImage: string | null;
-    backgroundOrigin: string | null;
-    backgroundPosition: string | null;
-    backgroundPositionX: string | null;
-    backgroundPositionY: string | null;
-    backgroundRepeat: string | null;
-    backgroundSize: string | null;
-    baselineShift: string | null;
-    border: string | null;
-    borderBottom: string | null;
-    borderBottomColor: string | null;
-    borderBottomLeftRadius: string | null;
-    borderBottomRightRadius: string | null;
-    borderBottomStyle: string | null;
-    borderBottomWidth: string | null;
-    borderCollapse: string | null;
-    borderColor: string | null;
-    borderImage: string | null;
-    borderImageOutset: string | null;
-    borderImageRepeat: string | null;
-    borderImageSlice: string | null;
-    borderImageSource: string | null;
-    borderImageWidth: string | null;
-    borderLeft: string | null;
-    borderLeftColor: string | null;
-    borderLeftStyle: string | null;
-    borderLeftWidth: string | null;
-    borderRadius: string | null;
-    borderRight: string | null;
-    borderRightColor: string | null;
-    borderRightStyle: string | null;
-    borderRightWidth: string | null;
-    borderSpacing: string | null;
-    borderStyle: string | null;
-    borderTop: string | null;
-    borderTopColor: string | null;
-    borderTopLeftRadius: string | null;
-    borderTopRightRadius: string | null;
-    borderTopStyle: string | null;
-    borderTopWidth: string | null;
-    borderWidth: string | null;
-    bottom: string | null;
-    boxShadow: string | null;
-    boxSizing: string | null;
-    breakAfter: string | null;
-    breakBefore: string | null;
-    breakInside: string | null;
-    captionSide: string | null;
-    clear: string | null;
-    clip: string | null;
-    clipPath: string | null;
-    clipRule: string | null;
-    color: string | null;
-    colorInterpolationFilters: string | null;
-    columnCount: any;
-    columnFill: string | null;
-    columnGap: any;
-    columnRule: string | null;
-    columnRuleColor: any;
-    columnRuleStyle: string | null;
-    columnRuleWidth: any;
-    columnSpan: string | null;
-    columnWidth: any;
-    columns: string | null;
-    content: string | null;
-    counterIncrement: string | null;
-    counterReset: string | null;
-    cssFloat: string | null;
-    cssText: string;
-    cursor: string | null;
-    direction: string | null;
-    display: string | null;
-    dominantBaseline: string | null;
-    emptyCells: string | null;
-    enableBackground: string | null;
-    fill: string | null;
-    fillOpacity: string | null;
-    fillRule: string | null;
-    filter: string | null;
-    flex: string | null;
-    flexBasis: string | null;
-    flexDirection: string | null;
-    flexFlow: string | null;
-    flexGrow: string | null;
-    flexShrink: string | null;
-    flexWrap: string | null;
-    floodColor: string | null;
-    floodOpacity: string | null;
-    font: string | null;
-    fontFamily: string | null;
-    fontFeatureSettings: string | null;
-    fontSize: string | null;
-    fontSizeAdjust: string | null;
-    fontStretch: string | null;
-    fontStyle: string | null;
-    fontVariant: string | null;
-    fontWeight: string | null;
-    glyphOrientationHorizontal: string | null;
-    glyphOrientationVertical: string | null;
-    height: string | null;
-    imeMode: string | null;
-    justifyContent: string | null;
-    kerning: string | null;
-    left: string | null;
-    readonly length: number;
-    letterSpacing: string | null;
-    lightingColor: string | null;
-    lineHeight: string | null;
-    listStyle: string | null;
-    listStyleImage: string | null;
-    listStylePosition: string | null;
-    listStyleType: string | null;
-    margin: string | null;
-    marginBottom: string | null;
-    marginLeft: string | null;
-    marginRight: string | null;
-    marginTop: string | null;
-    marker: string | null;
-    markerEnd: string | null;
-    markerMid: string | null;
-    markerStart: string | null;
-    mask: string | null;
-    maxHeight: string | null;
-    maxWidth: string | null;
-    minHeight: string | null;
-    minWidth: string | null;
-    msContentZoomChaining: string | null;
-    msContentZoomLimit: string | null;
-    msContentZoomLimitMax: any;
-    msContentZoomLimitMin: any;
-    msContentZoomSnap: string | null;
-    msContentZoomSnapPoints: string | null;
-    msContentZoomSnapType: string | null;
-    msContentZooming: string | null;
-    msFlowFrom: string | null;
-    msFlowInto: string | null;
-    msFontFeatureSettings: string | null;
-    msGridColumn: any;
-    msGridColumnAlign: string | null;
-    msGridColumnSpan: any;
-    msGridColumns: string | null;
-    msGridRow: any;
-    msGridRowAlign: string | null;
-    msGridRowSpan: any;
-    msGridRows: string | null;
-    msHighContrastAdjust: string | null;
-    msHyphenateLimitChars: string | null;
-    msHyphenateLimitLines: any;
-    msHyphenateLimitZone: any;
-    msHyphens: string | null;
-    msImeAlign: string | null;
-    msOverflowStyle: string | null;
-    msScrollChaining: string | null;
-    msScrollLimit: string | null;
-    msScrollLimitXMax: any;
-    msScrollLimitXMin: any;
-    msScrollLimitYMax: any;
-    msScrollLimitYMin: any;
-    msScrollRails: string | null;
-    msScrollSnapPointsX: string | null;
-    msScrollSnapPointsY: string | null;
-    msScrollSnapType: string | null;
-    msScrollSnapX: string | null;
-    msScrollSnapY: string | null;
-    msScrollTranslation: string | null;
-    msTextCombineHorizontal: string | null;
-    msTextSizeAdjust: any;
-    msTouchAction: string | null;
-    msTouchSelect: string | null;
-    msUserSelect: string | null;
-    msWrapFlow: string;
-    msWrapMargin: any;
-    msWrapThrough: string;
-    opacity: string | null;
-    order: string | null;
-    orphans: string | null;
-    outline: string | null;
-    outlineColor: string | null;
-    outlineStyle: string | null;
-    outlineWidth: string | null;
-    overflow: string | null;
-    overflowX: string | null;
-    overflowY: string | null;
-    padding: string | null;
-    paddingBottom: string | null;
-    paddingLeft: string | null;
-    paddingRight: string | null;
-    paddingTop: string | null;
-    pageBreakAfter: string | null;
-    pageBreakBefore: string | null;
-    pageBreakInside: string | null;
-    readonly parentRule: CSSRule;
-    perspective: string | null;
-    perspectiveOrigin: string | null;
-    pointerEvents: string | null;
-    position: string | null;
-    quotes: string | null;
-    right: string | null;
-    rubyAlign: string | null;
-    rubyOverhang: string | null;
-    rubyPosition: string | null;
-    stopColor: string | null;
-    stopOpacity: string | null;
-    stroke: string | null;
-    strokeDasharray: string | null;
-    strokeDashoffset: string | null;
-    strokeLinecap: string | null;
-    strokeLinejoin: string | null;
-    strokeMiterlimit: string | null;
-    strokeOpacity: string | null;
-    strokeWidth: string | null;
-    tableLayout: string | null;
-    textAlign: string | null;
-    textAlignLast: string | null;
-    textAnchor: string | null;
-    textDecoration: string | null;
-    textIndent: string | null;
-    textJustify: string | null;
-    textKashida: string | null;
-    textKashidaSpace: string | null;
-    textOverflow: string | null;
-    textShadow: string | null;
-    textTransform: string | null;
-    textUnderlinePosition: string | null;
-    top: string | null;
-    touchAction: string | null;
-    transform: string | null;
-    transformOrigin: string | null;
-    transformStyle: string | null;
-    transition: string | null;
-    transitionDelay: string | null;
-    transitionDuration: string | null;
-    transitionProperty: string | null;
-    transitionTimingFunction: string | null;
-    unicodeBidi: string | null;
-    verticalAlign: string | null;
-    visibility: string | null;
-    webkitAlignContent: string | null;
-    webkitAlignItems: string | null;
-    webkitAlignSelf: string | null;
-    webkitAnimation: string | null;
-    webkitAnimationDelay: string | null;
-    webkitAnimationDirection: string | null;
-    webkitAnimationDuration: string | null;
-    webkitAnimationFillMode: string | null;
-    webkitAnimationIterationCount: string | null;
-    webkitAnimationName: string | null;
-    webkitAnimationPlayState: string | null;
-    webkitAnimationTimingFunction: string | null;
-    webkitAppearance: string | null;
-    webkitBackfaceVisibility: string | null;
-    webkitBackgroundClip: string | null;
-    webkitBackgroundOrigin: string | null;
-    webkitBackgroundSize: string | null;
-    webkitBorderBottomLeftRadius: string | null;
-    webkitBorderBottomRightRadius: string | null;
-    webkitBorderImage: string | null;
-    webkitBorderRadius: string | null;
-    webkitBorderTopLeftRadius: string | null;
-    webkitBorderTopRightRadius: string | null;
-    webkitBoxAlign: string | null;
-    webkitBoxDirection: string | null;
-    webkitBoxFlex: string | null;
-    webkitBoxOrdinalGroup: string | null;
-    webkitBoxOrient: string | null;
-    webkitBoxPack: string | null;
-    webkitBoxSizing: string | null;
-    webkitColumnBreakAfter: string | null;
-    webkitColumnBreakBefore: string | null;
-    webkitColumnBreakInside: string | null;
-    webkitColumnCount: any;
-    webkitColumnGap: any;
-    webkitColumnRule: string | null;
-    webkitColumnRuleColor: any;
-    webkitColumnRuleStyle: string | null;
-    webkitColumnRuleWidth: any;
-    webkitColumnSpan: string | null;
-    webkitColumnWidth: any;
-    webkitColumns: string | null;
-    webkitFilter: string | null;
-    webkitFlex: string | null;
-    webkitFlexBasis: string | null;
-    webkitFlexDirection: string | null;
-    webkitFlexFlow: string | null;
-    webkitFlexGrow: string | null;
-    webkitFlexShrink: string | null;
-    webkitFlexWrap: string | null;
-    webkitJustifyContent: string | null;
-    webkitOrder: string | null;
-    webkitPerspective: string | null;
-    webkitPerspectiveOrigin: string | null;
-    webkitTapHighlightColor: string | null;
-    webkitTextFillColor: string | null;
-    webkitTextSizeAdjust: any;
-    webkitTransform: string | null;
-    webkitTransformOrigin: string | null;
-    webkitTransformStyle: string | null;
-    webkitTransition: string | null;
-    webkitTransitionDelay: string | null;
-    webkitTransitionDuration: string | null;
-    webkitTransitionProperty: string | null;
-    webkitTransitionTimingFunction: string | null;
-    webkitUserModify: string | null;
-    webkitUserSelect: string | null;
-    webkitWritingMode: string | null;
-    whiteSpace: string | null;
-    widows: string | null;
-    width: string | null;
-    wordBreak: string | null;
-    wordSpacing: string | null;
-    wordWrap: string | null;
-    writingMode: string | null;
-    zIndex: string | null;
-    zoom: string | null;
-    getPropertyPriority(propertyName: string): string;
-    getPropertyValue(propertyName: string): string;
-    item(index: number): string;
-    removeProperty(propertyName: string): string;
-    setProperty(propertyName: string, value: string | null, priority?: string): void;
-    [index: number]: string;
-}
-
-declare var CSSStyleDeclaration: {
-    prototype: CSSStyleDeclaration;
-    new(): CSSStyleDeclaration;
-}
-
-interface CSSStyleRule extends CSSRule {
-    readonly readOnly: boolean;
-    selectorText: string;
-    readonly style: CSSStyleDeclaration;
-}
-
-declare var CSSStyleRule: {
-    prototype: CSSStyleRule;
-    new(): CSSStyleRule;
-}
-
-interface CSSStyleSheet extends StyleSheet {
-    readonly cssRules: CSSRuleList;
-    cssText: string;
-    readonly href: string;
-    readonly id: string;
-    readonly imports: StyleSheetList;
-    readonly isAlternate: boolean;
-    readonly isPrefAlternate: boolean;
-    readonly ownerRule: CSSRule;
-    readonly owningElement: Element;
-    readonly pages: StyleSheetPageList;
-    readonly readOnly: boolean;
-    readonly rules: CSSRuleList;
-    addImport(bstrURL: string, lIndex?: number): number;
-    addPageRule(bstrSelector: string, bstrStyle: string, lIndex?: number): number;
-    addRule(bstrSelector: string, bstrStyle?: string, lIndex?: number): number;
-    deleteRule(index?: number): void;
-    insertRule(rule: string, index?: number): number;
-    removeImport(lIndex: number): void;
-    removeRule(lIndex: number): void;
-}
-
-declare var CSSStyleSheet: {
-    prototype: CSSStyleSheet;
-    new(): CSSStyleSheet;
-}
-
-interface CSSSupportsRule extends CSSConditionRule {
-}
-
-declare var CSSSupportsRule: {
-    prototype: CSSSupportsRule;
-    new(): CSSSupportsRule;
-}
-
-interface CanvasGradient {
-    addColorStop(offset: number, color: string): void;
-}
-
-declare var CanvasGradient: {
-    prototype: CanvasGradient;
-    new(): CanvasGradient;
-}
-
-interface CanvasPattern {
-}
-
-declare var CanvasPattern: {
-    prototype: CanvasPattern;
-    new(): CanvasPattern;
-}
-
-interface CanvasRenderingContext2D extends Object, CanvasPathMethods {
-    readonly canvas: HTMLCanvasElement;
-    fillStyle: string | CanvasGradient | CanvasPattern;
-    font: string;
-    globalAlpha: number;
-    globalCompositeOperation: string;
-    lineCap: string;
-    lineDashOffset: number;
-    lineJoin: string;
-    lineWidth: number;
-    miterLimit: number;
-    msFillRule: string;
-    msImageSmoothingEnabled: boolean;
-    shadowBlur: number;
-    shadowColor: string;
-    shadowOffsetX: number;
-    shadowOffsetY: number;
-    strokeStyle: string | CanvasGradient | CanvasPattern;
-    textAlign: string;
-    textBaseline: string;
-    mozImageSmoothingEnabled: boolean;
-    webkitImageSmoothingEnabled: boolean;
-    oImageSmoothingEnabled: boolean;
-    beginPath(): void;
-    clearRect(x: number, y: number, w: number, h: number): void;
-    clip(fillRule?: string): void;
-    createImageData(imageDataOrSw: number | ImageData, sh?: number): ImageData;
-    createLinearGradient(x0: number, y0: number, x1: number, y1: number): CanvasGradient;
-    createPattern(image: HTMLImageElement | HTMLCanvasElement | HTMLVideoElement, repetition: string): CanvasPattern;
-    createRadialGradient(x0: number, y0: number, r0: number, x1: number, y1: number, r1: number): CanvasGradient;
-    drawImage(image: HTMLImageElement | HTMLCanvasElement | HTMLVideoElement, offsetX: number, offsetY: number, width?: number, height?: number, canvasOffsetX?: number, canvasOffsetY?: number, canvasImageWidth?: number, canvasImageHeight?: number): void;
-    fill(fillRule?: string): void;
-    fillRect(x: number, y: number, w: number, h: number): void;
-    fillText(text: string, x: number, y: number, maxWidth?: number): void;
-    getImageData(sx: number, sy: number, sw: number, sh: number): ImageData;
-    getLineDash(): number[];
-    isPointInPath(x: number, y: number, fillRule?: string): boolean;
-    measureText(text: string): TextMetrics;
-    putImageData(imagedata: ImageData, dx: number, dy: number, dirtyX?: number, dirtyY?: number, dirtyWidth?: number, dirtyHeight?: number): void;
-    restore(): void;
-    rotate(angle: number): void;
-    save(): void;
-    scale(x: number, y: number): void;
-    setLineDash(segments: number[]): void;
-    setTransform(m11: number, m12: number, m21: number, m22: number, dx: number, dy: number): void;
-    stroke(): void;
-    strokeRect(x: number, y: number, w: number, h: number): void;
-    strokeText(text: string, x: number, y: number, maxWidth?: number): void;
-    transform(m11: number, m12: number, m21: number, m22: number, dx: number, dy: number): void;
-    translate(x: number, y: number): void;
-}
-
-declare var CanvasRenderingContext2D: {
-    prototype: CanvasRenderingContext2D;
-    new(): CanvasRenderingContext2D;
-}
-
-interface ChannelMergerNode extends AudioNode {
-}
-
-declare var ChannelMergerNode: {
-    prototype: ChannelMergerNode;
-    new(): ChannelMergerNode;
-}
-
-interface ChannelSplitterNode extends AudioNode {
-}
-
-declare var ChannelSplitterNode: {
-    prototype: ChannelSplitterNode;
-    new(): ChannelSplitterNode;
-}
-
-interface CharacterData extends Node, ChildNode {
-    data: string;
-    readonly length: number;
-    appendData(arg: string): void;
-    deleteData(offset: number, count: number): void;
-    insertData(offset: number, arg: string): void;
-    replaceData(offset: number, count: number, arg: string): void;
-    substringData(offset: number, count: number): string;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var CharacterData: {
-    prototype: CharacterData;
-    new(): CharacterData;
-}
-
-interface ClientRect {
-    bottom: number;
-    readonly height: number;
-    left: number;
-    right: number;
-    top: number;
-    readonly width: number;
-}
-
-declare var ClientRect: {
-    prototype: ClientRect;
-    new(): ClientRect;
-}
-
-interface ClientRectList {
-    readonly length: number;
-    item(index: number): ClientRect;
-    [index: number]: ClientRect;
-}
-
-declare var ClientRectList: {
-    prototype: ClientRectList;
-    new(): ClientRectList;
-}
-
-interface ClipboardEvent extends Event {
-    readonly clipboardData: DataTransfer;
-}
-
-declare var ClipboardEvent: {
-    prototype: ClipboardEvent;
-    new(type: string, eventInitDict?: ClipboardEventInit): ClipboardEvent;
-}
-
-interface CloseEvent extends Event {
-    readonly code: number;
-    readonly reason: string;
-    readonly wasClean: boolean;
-    initCloseEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, wasCleanArg: boolean, codeArg: number, reasonArg: string): void;
-}
-
-declare var CloseEvent: {
-    prototype: CloseEvent;
-    new(): CloseEvent;
-}
-
-interface CommandEvent extends Event {
-    readonly commandName: string;
-    readonly detail: string | null;
-}
-
-declare var CommandEvent: {
-    prototype: CommandEvent;
-    new(type: string, eventInitDict?: CommandEventInit): CommandEvent;
-}
-
-interface Comment extends CharacterData {
-    text: string;
-}
-
-declare var Comment: {
-    prototype: Comment;
-    new(): Comment;
-}
-
-interface CompositionEvent extends UIEvent {
-    readonly data: string;
-    readonly locale: string;
-    initCompositionEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, dataArg: string, locale: string): void;
-}
-
-declare var CompositionEvent: {
-    prototype: CompositionEvent;
-    new(typeArg: string, eventInitDict?: CompositionEventInit): CompositionEvent;
-}
-
-interface Console {
-    assert(test?: boolean, message?: string, ...optionalParams: any[]): void;
-    clear(): void;
-    count(countTitle?: string): void;
-    debug(message?: string, ...optionalParams: any[]): void;
-    dir(value?: any, ...optionalParams: any[]): void;
-    dirxml(value: any): void;
-    error(message?: any, ...optionalParams: any[]): void;
-    exception(message?: string, ...optionalParams: any[]): void;
-    group(groupTitle?: string): void;
-    groupCollapsed(groupTitle?: string): void;
-    groupEnd(): void;
-    info(message?: any, ...optionalParams: any[]): void;
-    log(message?: any, ...optionalParams: any[]): void;
-    msIsIndependentlyComposed(element: Element): boolean;
-    profile(reportName?: string): void;
-    profileEnd(): void;
-    select(element: Element): void;
-    table(...data: any[]): void;
-    time(timerName?: string): void;
-    timeEnd(timerName?: string): void;
-    trace(message?: any, ...optionalParams: any[]): void;
-    warn(message?: any, ...optionalParams: any[]): void;
-}
-
-declare var Console: {
-    prototype: Console;
-    new(): Console;
-}
-
-interface ConvolverNode extends AudioNode {
-    buffer: AudioBuffer | null;
-    normalize: boolean;
-}
-
-declare var ConvolverNode: {
-    prototype: ConvolverNode;
-    new(): ConvolverNode;
-}
-
-interface Coordinates {
-    readonly accuracy: number;
-    readonly altitude: number | null;
-    readonly altitudeAccuracy: number | null;
-    readonly heading: number | null;
-    readonly latitude: number;
-    readonly longitude: number;
-    readonly speed: number | null;
-}
-
-declare var Coordinates: {
-    prototype: Coordinates;
-    new(): Coordinates;
-}
-
-interface Crypto extends Object, RandomSource {
-    readonly subtle: SubtleCrypto;
-}
-
-declare var Crypto: {
-    prototype: Crypto;
-    new(): Crypto;
-}
-
-interface CryptoKey {
-    readonly algorithm: KeyAlgorithm;
-    readonly extractable: boolean;
-    readonly type: string;
-    readonly usages: string[];
-}
-
-declare var CryptoKey: {
-    prototype: CryptoKey;
-    new(): CryptoKey;
-}
-
-interface CryptoKeyPair {
-    privateKey: CryptoKey;
-    publicKey: CryptoKey;
-}
-
-declare var CryptoKeyPair: {
-    prototype: CryptoKeyPair;
-    new(): CryptoKeyPair;
-}
-
-interface CustomEvent extends Event {
-    readonly detail: any;
-    initCustomEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, detailArg: any): void;
-}
-
-declare var CustomEvent: {
-    prototype: CustomEvent;
-    new(typeArg: string, eventInitDict?: CustomEventInit): CustomEvent;
-}
-
-interface DOMError {
-    readonly name: string;
-    toString(): string;
-}
-
-declare var DOMError: {
-    prototype: DOMError;
-    new(): DOMError;
-}
-
-interface DOMException {
-    readonly code: number;
-    readonly message: string;
-    readonly name: string;
-    toString(): string;
-    readonly ABORT_ERR: number;
-    readonly DATA_CLONE_ERR: number;
-    readonly DOMSTRING_SIZE_ERR: number;
-    readonly HIERARCHY_REQUEST_ERR: number;
-    readonly INDEX_SIZE_ERR: number;
-    readonly INUSE_ATTRIBUTE_ERR: number;
-    readonly INVALID_ACCESS_ERR: number;
-    readonly INVALID_CHARACTER_ERR: number;
-    readonly INVALID_MODIFICATION_ERR: number;
-    readonly INVALID_NODE_TYPE_ERR: number;
-    readonly INVALID_STATE_ERR: number;
-    readonly NAMESPACE_ERR: number;
-    readonly NETWORK_ERR: number;
-    readonly NOT_FOUND_ERR: number;
-    readonly NOT_SUPPORTED_ERR: number;
-    readonly NO_DATA_ALLOWED_ERR: number;
-    readonly NO_MODIFICATION_ALLOWED_ERR: number;
-    readonly PARSE_ERR: number;
-    readonly QUOTA_EXCEEDED_ERR: number;
-    readonly SECURITY_ERR: number;
-    readonly SERIALIZE_ERR: number;
-    readonly SYNTAX_ERR: number;
-    readonly TIMEOUT_ERR: number;
-    readonly TYPE_MISMATCH_ERR: number;
-    readonly URL_MISMATCH_ERR: number;
-    readonly VALIDATION_ERR: number;
-    readonly WRONG_DOCUMENT_ERR: number;
-}
-
-declare var DOMException: {
-    prototype: DOMException;
-    new(): DOMException;
-    readonly ABORT_ERR: number;
-    readonly DATA_CLONE_ERR: number;
-    readonly DOMSTRING_SIZE_ERR: number;
-    readonly HIERARCHY_REQUEST_ERR: number;
-    readonly INDEX_SIZE_ERR: number;
-    readonly INUSE_ATTRIBUTE_ERR: number;
-    readonly INVALID_ACCESS_ERR: number;
-    readonly INVALID_CHARACTER_ERR: number;
-    readonly INVALID_MODIFICATION_ERR: number;
-    readonly INVALID_NODE_TYPE_ERR: number;
-    readonly INVALID_STATE_ERR: number;
-    readonly NAMESPACE_ERR: number;
-    readonly NETWORK_ERR: number;
-    readonly NOT_FOUND_ERR: number;
-    readonly NOT_SUPPORTED_ERR: number;
-    readonly NO_DATA_ALLOWED_ERR: number;
-    readonly NO_MODIFICATION_ALLOWED_ERR: number;
-    readonly PARSE_ERR: number;
-    readonly QUOTA_EXCEEDED_ERR: number;
-    readonly SECURITY_ERR: number;
-    readonly SERIALIZE_ERR: number;
-    readonly SYNTAX_ERR: number;
-    readonly TIMEOUT_ERR: number;
-    readonly TYPE_MISMATCH_ERR: number;
-    readonly URL_MISMATCH_ERR: number;
-    readonly VALIDATION_ERR: number;
-    readonly WRONG_DOCUMENT_ERR: number;
-}
-
-interface DOMImplementation {
-    createDocument(namespaceURI: string | null, qualifiedName: string | null, doctype: DocumentType): Document;
-    createDocumentType(qualifiedName: string, publicId: string | null, systemId: string | null): DocumentType;
-    createHTMLDocument(title: string): Document;
-    hasFeature(feature: string | null, version: string | null): boolean;
-}
-
-declare var DOMImplementation: {
-    prototype: DOMImplementation;
-    new(): DOMImplementation;
-}
-
-interface DOMParser {
-    parseFromString(source: string, mimeType: string): Document;
-}
-
-declare var DOMParser: {
-    prototype: DOMParser;
-    new(): DOMParser;
-}
-
-interface DOMSettableTokenList extends DOMTokenList {
-    value: string;
-}
-
-declare var DOMSettableTokenList: {
-    prototype: DOMSettableTokenList;
-    new(): DOMSettableTokenList;
-}
-
-interface DOMStringList {
-    readonly length: number;
-    contains(str: string): boolean;
-    item(index: number): string | null;
-    [index: number]: string;
-}
-
-declare var DOMStringList: {
-    prototype: DOMStringList;
-    new(): DOMStringList;
-}
-
-interface DOMStringMap {
-    [name: string]: string;
-}
-
-declare var DOMStringMap: {
-    prototype: DOMStringMap;
-    new(): DOMStringMap;
-}
-
-interface DOMTokenList {
-    readonly length: number;
-    add(...token: string[]): void;
-    contains(token: string): boolean;
-    item(index: number): string;
-    remove(...token: string[]): void;
-    toString(): string;
-    toggle(token: string, force?: boolean): boolean;
-    [index: number]: string;
-}
-
-declare var DOMTokenList: {
-    prototype: DOMTokenList;
-    new(): DOMTokenList;
-}
-
-interface DataCue extends TextTrackCue {
-    data: ArrayBuffer;
-}
-
-declare var DataCue: {
-    prototype: DataCue;
-    new(): DataCue;
-}
-
-interface DataTransfer {
-    dropEffect: string;
-    effectAllowed: string;
-    readonly files: FileList;
-    readonly items: DataTransferItemList;
-    readonly types: DOMStringList;
-    clearData(format?: string): boolean;
-    getData(format: string): string;
-    setData(format: string, data: string): boolean;
-}
-
-declare var DataTransfer: {
-    prototype: DataTransfer;
-    new(): DataTransfer;
-}
-
-interface DataTransferItem {
-    readonly kind: string;
-    readonly type: string;
-    getAsFile(): File | null;
-    getAsString(_callback: FunctionStringCallback | null): void;
-}
-
-declare var DataTransferItem: {
-    prototype: DataTransferItem;
-    new(): DataTransferItem;
-}
-
-interface DataTransferItemList {
-    readonly length: number;
-    add(data: File): DataTransferItem | null;
-    clear(): void;
-    item(index: number): DataTransferItem;
-    remove(index: number): void;
-    [index: number]: DataTransferItem;
-}
-
-declare var DataTransferItemList: {
-    prototype: DataTransferItemList;
-    new(): DataTransferItemList;
-}
-
-interface DeferredPermissionRequest {
-    readonly id: number;
-    readonly type: string;
-    readonly uri: string;
-    allow(): void;
-    deny(): void;
-}
-
-declare var DeferredPermissionRequest: {
-    prototype: DeferredPermissionRequest;
-    new(): DeferredPermissionRequest;
-}
-
-interface DelayNode extends AudioNode {
-    readonly delayTime: AudioParam;
-}
-
-declare var DelayNode: {
-    prototype: DelayNode;
-    new(): DelayNode;
-}
-
-interface DeviceAcceleration {
-    readonly x: number | null;
-    readonly y: number | null;
-    readonly z: number | null;
-}
-
-declare var DeviceAcceleration: {
-    prototype: DeviceAcceleration;
-    new(): DeviceAcceleration;
-}
-
-interface DeviceLightEvent extends Event {
-    readonly value: number;
-}
-
-declare var DeviceLightEvent: {
-    prototype: DeviceLightEvent;
-    new(type: string, eventInitDict?: DeviceLightEventInit): DeviceLightEvent;
-}
-
-interface DeviceMotionEvent extends Event {
-    readonly acceleration: DeviceAcceleration | null;
-    readonly accelerationIncludingGravity: DeviceAcceleration | null;
-    readonly interval: number | null;
-    readonly rotationRate: DeviceRotationRate | null;
-    initDeviceMotionEvent(type: string, bubbles: boolean, cancelable: boolean, acceleration: DeviceAccelerationDict | null, accelerationIncludingGravity: DeviceAccelerationDict | null, rotationRate: DeviceRotationRateDict | null, interval: number | null): void;
-}
-
-declare var DeviceMotionEvent: {
-    prototype: DeviceMotionEvent;
-    new(): DeviceMotionEvent;
-}
-
-interface DeviceOrientationEvent extends Event {
-    readonly absolute: boolean;
-    readonly alpha: number | null;
-    readonly beta: number | null;
-    readonly gamma: number | null;
-    initDeviceOrientationEvent(type: string, bubbles: boolean, cancelable: boolean, alpha: number | null, beta: number | null, gamma: number | null, absolute: boolean): void;
-}
-
-declare var DeviceOrientationEvent: {
-    prototype: DeviceOrientationEvent;
-    new(): DeviceOrientationEvent;
-}
-
-interface DeviceRotationRate {
-    readonly alpha: number | null;
-    readonly beta: number | null;
-    readonly gamma: number | null;
-}
-
-declare var DeviceRotationRate: {
-    prototype: DeviceRotationRate;
-    new(): DeviceRotationRate;
-}
-
-interface Document extends Node, GlobalEventHandlers, NodeSelector, DocumentEvent, ParentNode {
-    /**
-      * Sets or gets the URL for the current document. 
-      */
-    readonly URL: string;
-    /**
-      * Gets the URL for the document, stripped of any character encoding.
-      */
-    readonly URLUnencoded: string;
-    /**
-      * Gets the object that has the focus when the parent document has focus.
-      */
-    readonly activeElement: Element;
-    /**
-      * Sets or gets the color of all active links in the document.
-      */
-    alinkColor: string;
-    /**
-      * Returns a reference to the collection of elements contained by the object.
-      */
-    readonly all: HTMLAllCollection;
-    /**
-      * Retrieves a collection of all a objects that have a name and/or id property. Objects in this collection are in HTML source order.
-      */
-    anchors: HTMLCollectionOf<HTMLAnchorElement>;
-    /**
-      * Retrieves a collection of all applet objects in the document.
-      */
-    applets: HTMLCollectionOf<HTMLAppletElement>;
-    /**
-      * Deprecated. Sets or retrieves a value that indicates the background color behind the object. 
-      */
-    bgColor: string;
-    /**
-      * Specifies the beginning and end of the document body.
-      */
-    body: HTMLElement;
-    readonly characterSet: string;
-    /**
-      * Gets or sets the character set used to encode the object.
-      */
-    charset: string;
-    /**
-      * Gets a value that indicates whether standards-compliant mode is switched on for the object.
-      */
-    readonly compatMode: string;
-    cookie: string;
-    readonly currentScript: HTMLScriptElement | SVGScriptElement;
-    /**
-      * Gets the default character set from the current regional language settings.
-      */
-    readonly defaultCharset: string;
-    readonly defaultView: Window;
-    /**
-      * Sets or gets a value that indicates whether the document can be edited.
-      */
-    designMode: string;
-    /**
-      * Sets or retrieves a value that indicates the reading order of the object. 
-      */
-    dir: string;
-    /**
-      * Gets an object representing the document type declaration associated with the current document. 
-      */
-    readonly doctype: DocumentType;
-    /**
-      * Gets a reference to the root node of the document. 
-      */
-    documentElement: HTMLElement;
-    /**
-      * Sets or gets the security domain of the document. 
-      */
-    domain: string;
-    /**
-      * Retrieves a collection of all embed objects in the document.
-      */
-    embeds: HTMLCollectionOf<HTMLEmbedElement>;
-    /**
-      * Sets or gets the foreground (text) color of the document.
-      */
-    fgColor: string;
-    /**
-      * Retrieves a collection, in source order, of all form objects in the document.
-      */
-    forms: HTMLCollectionOf<HTMLFormElement>;
-    readonly fullscreenElement: Element | null;
-    readonly fullscreenEnabled: boolean;
-    readonly head: HTMLHeadElement;
-    readonly hidden: boolean;
-    /**
-      * Retrieves a collection, in source order, of img objects in the document.
-      */
-    images: HTMLCollectionOf<HTMLImageElement>;
-    /**
-      * Gets the implementation object of the current document. 
-      */
-    readonly implementation: DOMImplementation;
-    /**
-      * Returns the character encoding used to create the webpage that is loaded into the document object.
-      */
-    readonly inputEncoding: string | null;
-    /**
-      * Gets the date that the page was last modified, if the page supplies one. 
-      */
-    readonly lastModified: string;
-    /**
-      * Sets or gets the color of the document links. 
-      */
-    linkColor: string;
-    /**
-      * Retrieves a collection of all a objects that specify the href property and all area objects in the document.
-      */
-    links: HTMLCollectionOf<HTMLAnchorElement | HTMLAreaElement>;
-    /**
-      * Contains information about the current URL. 
-      */
-    readonly location: Location;
-    msCSSOMElementFloatMetrics: boolean;
-    msCapsLockWarningOff: boolean;
-    /**
-      * Fires when the user aborts the download.
-      * @param ev The event.
-      */
-    onabort: (this: this, ev: UIEvent) => any;
-    /**
-      * Fires when the object is set as the active element.
-      * @param ev The event.
-      */
-    onactivate: (this: this, ev: UIEvent) => any;
-    /**
-      * Fires immediately before the object is set as the active element.
-      * @param ev The event.
-      */
-    onbeforeactivate: (this: this, ev: UIEvent) => any;
-    /**
-      * Fires immediately before the activeElement is changed from the current object to another object in the parent document.
-      * @param ev The event.
-      */
-    onbeforedeactivate: (this: this, ev: UIEvent) => any;
-    /** 
-      * Fires when the object loses the input focus. 
-      * @param ev The focus event.
-      */
-    onblur: (this: this, ev: FocusEvent) => any;
-    /**
-      * Occurs when playback is possible, but would require further buffering. 
-      * @param ev The event.
-      */
-    oncanplay: (this: this, ev: Event) => any;
-    oncanplaythrough: (this: this, ev: Event) => any;
-    /**
-      * Fires when the contents of the object or selection have changed. 
-      * @param ev The event.
-      */
-    onchange: (this: this, ev: Event) => any;
-    /**
-      * Fires when the user clicks the left mouse button on the object
-      * @param ev The mouse event.
-      */
-    onclick: (this: this, ev: MouseEvent) => any;
-    /**
-      * Fires when the user clicks the right mouse button in the client area, opening the context menu. 
-      * @param ev The mouse event.
-      */
-    oncontextmenu: (this: this, ev: PointerEvent) => any;
-    /**
-      * Fires when the user double-clicks the object.
-      * @param ev The mouse event.
-      */
-    ondblclick: (this: this, ev: MouseEvent) => any;
-    /**
-      * Fires when the activeElement is changed from the current object to another object in the parent document.
-      * @param ev The UI Event
-      */
-    ondeactivate: (this: this, ev: UIEvent) => any;
-    /**
-      * Fires on the source object continuously during a drag operation.
-      * @param ev The event.
-      */
-    ondrag: (this: this, ev: DragEvent) => any;
-    /**
-      * Fires on the source object when the user releases the mouse at the close of a drag operation.
-      * @param ev The event.
-      */
-    ondragend: (this: this, ev: DragEvent) => any;
-    /** 
-      * Fires on the target element when the user drags the object to a valid drop target.
-      * @param ev The drag event.
-      */
-    ondragenter: (this: this, ev: DragEvent) => any;
-    /** 
-      * Fires on the target object when the user moves the mouse out of a valid drop target during a drag operation.
-      * @param ev The drag event.
-      */
-    ondragleave: (this: this, ev: DragEvent) => any;
-    /**
-      * Fires on the target element continuously while the user drags the object over a valid drop target.
-      * @param ev The event.
-      */
-    ondragover: (this: this, ev: DragEvent) => any;
-    /**
-      * Fires on the source object when the user starts to drag a text selection or selected object. 
-      * @param ev The event.
-      */
-    ondragstart: (this: this, ev: DragEvent) => any;
-    ondrop: (this: this, ev: DragEvent) => any;
-    /**
-      * Occurs when the duration attribute is updated. 
-      * @param ev The event.
-      */
-    ondurationchange: (this: this, ev: Event) => any;
-    /**
-      * Occurs when the media element is reset to its initial state. 
-      * @param ev The event.
-      */
-    onemptied: (this: this, ev: Event) => any;
-    /**
-      * Occurs when the end of playback is reached. 
-      * @param ev The event
-      */
-    onended: (this: this, ev: MediaStreamErrorEvent) => any;
-    /**
-      * Fires when an error occurs during object loading.
-      * @param ev The event.
-      */
-    onerror: (this: this, ev: ErrorEvent) => any;
-    /**
-      * Fires when the object receives focus. 
-      * @param ev The event.
-      */
-    onfocus: (this: this, ev: FocusEvent) => any;
-    onfullscreenchange: (this: this, ev: Event) => any;
-    onfullscreenerror: (this: this, ev: Event) => any;
-    oninput: (this: this, ev: Event) => any;
-    oninvalid: (this: this, ev: Event) => any;
-    /**
-      * Fires when the user presses a key.
-      * @param ev The keyboard event
-      */
-    onkeydown: (this: this, ev: KeyboardEvent) => any;
-    /**
-      * Fires when the user presses an alphanumeric key.
-      * @param ev The event.
-      */
-    onkeypress: (this: this, ev: KeyboardEvent) => any;
-    /**
-      * Fires when the user releases a key.
-      * @param ev The keyboard event
-      */
-    onkeyup: (this: this, ev: KeyboardEvent) => any;
-    /**
-      * Fires immediately after the browser loads the object. 
-      * @param ev The event.
-      */
-    onload: (this: this, ev: Event) => any;
-    /**
-      * Occurs when media data is loaded at the current playback position. 
-      * @param ev The event.
-      */
-    onloadeddata: (this: this, ev: Event) => any;
-    /**
-      * Occurs when the duration and dimensions of the media have been determined.
-      * @param ev The event.
-      */
-    onloadedmetadata: (this: this, ev: Event) => any;
-    /**
-      * Occurs when Internet Explorer begins looking for media data. 
-      * @param ev The event.
-      */
-    onloadstart: (this: this, ev: Event) => any;
-    /**
-      * Fires when the user clicks the object with either mouse button. 
-      * @param ev The mouse event.
-      */
-    onmousedown: (this: this, ev: MouseEvent) => any;
-    /**
-      * Fires when the user moves the mouse over the object. 
-      * @param ev The mouse event.
-      */
-    onmousemove: (this: this, ev: MouseEvent) => any;
-    /**
-      * Fires when the user moves the mouse pointer outside the boundaries of the object. 
-      * @param ev The mouse event.
-      */
-    onmouseout: (this: this, ev: MouseEvent) => any;
-    /**
-      * Fires when the user moves the mouse pointer into the object.
-      * @param ev The mouse event.
-      */
-    onmouseover: (this: this, ev: MouseEvent) => any;
-    /**
-      * Fires when the user releases a mouse button while the mouse is over the object. 
-      * @param ev The mouse event.
-      */
-    onmouseup: (this: this, ev: MouseEvent) => any;
-    /**
-      * Fires when the wheel button is rotated. 
-      * @param ev The mouse event
-      */
-    onmousewheel: (this: this, ev: WheelEvent) => any;
-    onmscontentzoom: (this: this, ev: UIEvent) => any;
-    onmsgesturechange: (this: this, ev: MSGestureEvent) => any;
-    onmsgesturedoubletap: (this: this, ev: MSGestureEvent) => any;
-    onmsgestureend: (this: this, ev: MSGestureEvent) => any;
-    onmsgesturehold: (this: this, ev: MSGestureEvent) => any;
-    onmsgesturestart: (this: this, ev: MSGestureEvent) => any;
-    onmsgesturetap: (this: this, ev: MSGestureEvent) => any;
-    onmsinertiastart: (this: this, ev: MSGestureEvent) => any;
-    onmsmanipulationstatechanged: (this: this, ev: MSManipulationEvent) => any;
-    onmspointercancel: (this: this, ev: MSPointerEvent) => any;
-    onmspointerdown: (this: this, ev: MSPointerEvent) => any;
-    onmspointerenter: (this: this, ev: MSPointerEvent) => any;
-    onmspointerleave: (this: this, ev: MSPointerEvent) => any;
-    onmspointermove: (this: this, ev: MSPointerEvent) => any;
-    onmspointerout: (this: this, ev: MSPointerEvent) => any;
-    onmspointerover: (this: this, ev: MSPointerEvent) => any;
-    onmspointerup: (this: this, ev: MSPointerEvent) => any;
-    /**
-      * Occurs when an item is removed from a Jump List of a webpage running in Site Mode. 
-      * @param ev The event.
-      */
-    onmssitemodejumplistitemremoved: (this: this, ev: MSSiteModeEvent) => any;
-    /**
-      * Occurs when a user clicks a button in a Thumbnail Toolbar of a webpage running in Site Mode.
-      * @param ev The event.
-      */
-    onmsthumbnailclick: (this: this, ev: MSSiteModeEvent) => any;
-    /**
-      * Occurs when playback is paused.
-      * @param ev The event.
-      */
-    onpause: (this: this, ev: Event) => any;
-    /**
-      * Occurs when the play method is requested. 
-      * @param ev The event.
-      */
-    onplay: (this: this, ev: Event) => any;
-    /**
-      * Occurs when the audio or video has started playing. 
-      * @param ev The event.
-      */
-    onplaying: (this: this, ev: Event) => any;
-    onpointerlockchange: (this: this, ev: Event) => any;
-    onpointerlockerror: (this: this, ev: Event) => any;
-    /**
-      * Occurs to indicate progress while downloading media data. 
-      * @param ev The event.
-      */
-    onprogress: (this: this, ev: ProgressEvent) => any;
-    /**
-      * Occurs when the playback rate is increased or decreased. 
-      * @param ev The event.
-      */
-    onratechange: (this: this, ev: Event) => any;
-    /**
-      * Fires when the state of the object has changed.
-      * @param ev The event
-      */
-    onreadystatechange: (this: this, ev: ProgressEvent) => any;
-    /**
-      * Fires when the user resets a form. 
-      * @param ev The event.
-      */
-    onreset: (this: this, ev: Event) => any;
-    /**
-      * Fires when the user repositions the scroll box in the scroll bar on the object. 
-      * @param ev The event.
-      */
-    onscroll: (this: this, ev: UIEvent) => any;
-    /**
-      * Occurs when the seek operation ends. 
-      * @param ev The event.
-      */
-    onseeked: (this: this, ev: Event) => any;
-    /**
-      * Occurs when the current playback position is moved. 
-      * @param ev The event.
-      */
-    onseeking: (this: this, ev: Event) => any;
-    /**
-      * Fires when the current selection changes.
-      * @param ev The event.
-      */
-    onselect: (this: this, ev: UIEvent) => any;
-    /**
-      * Fires when the selection state of a document changes.
-      * @param ev The event.
-      */
-    onselectionchange: (this: this, ev: Event) => any;
-    onselectstart: (this: this, ev: Event) => any;
-    /**
-      * Occurs when the download has stopped. 
-      * @param ev The event.
-      */
-    onstalled: (this: this, ev: Event) => any;
-    /**
-      * Fires when the user clicks the Stop button or leaves the Web page.
-      * @param ev The event.
-      */
-    onstop: (this: this, ev: Event) => any;
-    onsubmit: (this: this, ev: Event) => any;
-    /**
-      * Occurs if the load operation has been intentionally halted. 
-      * @param ev The event.
-      */
-    onsuspend: (this: this, ev: Event) => any;
-    /**
-      * Occurs to indicate the current playback position.
-      * @param ev The event.
-      */
-    ontimeupdate: (this: this, ev: Event) => any;
-    ontouchcancel: (ev: TouchEvent) => any;
-    ontouchend: (ev: TouchEvent) => any;
-    ontouchmove: (ev: TouchEvent) => any;
-    ontouchstart: (ev: TouchEvent) => any;
-    /**
-      * Occurs when the volume is changed, or playback is muted or unmuted.
-      * @param ev The event.
-      */
-    onvolumechange: (this: this, ev: Event) => any;
-    /**
-      * Occurs when playback stops because the next frame of a video resource is not available. 
-      * @param ev The event.
-      */
-    onwaiting: (this: this, ev: Event) => any;
-    onwebkitfullscreenchange: (this: this, ev: Event) => any;
-    onwebkitfullscreenerror: (this: this, ev: Event) => any;
-    plugins: HTMLCollectionOf<HTMLEmbedElement>;
-    readonly pointerLockElement: Element;
-    /**
-      * Retrieves a value that indicates the current state of the object.
-      */
-    readonly readyState: string;
-    /**
-      * Gets the URL of the location that referred the user to the current page.
-      */
-    readonly referrer: string;
-    /**
-      * Gets the root svg element in the document hierarchy.
-      */
-    readonly rootElement: SVGSVGElement;
-    /**
-      * Retrieves a collection of all script objects in the document.
-      */
-    scripts: HTMLCollectionOf<HTMLScriptElement>;
-    readonly scrollingElement: Element | null;
-    /**
-      * Retrieves a collection of styleSheet objects representing the style sheets that correspond to each instance of a link or style object in the document.
-      */
-    readonly styleSheets: StyleSheetList;
-    /**
-      * Contains the title of the document.
-      */
-    title: string;
-    readonly visibilityState: string;
-    /** 
-      * Sets or gets the color of the links that the user has visited.
-      */
-    vlinkColor: string;
-    readonly webkitCurrentFullScreenElement: Element | null;
-    readonly webkitFullscreenElement: Element | null;
-    readonly webkitFullscreenEnabled: boolean;
-    readonly webkitIsFullScreen: boolean;
-    readonly xmlEncoding: string | null;
-    xmlStandalone: boolean;
-    /**
-      * Gets or sets the version attribute specified in the declaration of an XML document.
-      */
-    xmlVersion: string | null;
-    adoptNode(source: Node): Node;
-    captureEvents(): void;
-    caretRangeFromPoint(x: number, y: number): Range;
-    clear(): void;
-    /**
-      * Closes an output stream and forces the sent data to display.
-      */
-    close(): void;
-    /**
-      * Creates an attribute object with a specified name.
-      * @param name String that sets the attribute object's name.
-      */
-    createAttribute(name: string): Attr;
-    createAttributeNS(namespaceURI: string | null, qualifiedName: string): Attr;
-    createCDATASection(data: string): CDATASection;
-    /**
-      * Creates a comment object with the specified data.
-      * @param data Sets the comment object's data.
-      */
-    createComment(data: string): Comment;
-    /**
-      * Creates a new document.
-      */
-    createDocumentFragment(): DocumentFragment;
-    /**
-      * Creates an instance of the element for the specified tag.
-      * @param tagName The name of an element.
-      */
-    createElement(tagName: "a"): HTMLAnchorElement;
-    createElement(tagName: "applet"): HTMLAppletElement;
-    createElement(tagName: "area"): HTMLAreaElement;
-    createElement(tagName: "audio"): HTMLAudioElement;
-    createElement(tagName: "base"): HTMLBaseElement;
-    createElement(tagName: "basefont"): HTMLBaseFontElement;
-    createElement(tagName: "blockquote"): HTMLQuoteElement;
-    createElement(tagName: "body"): HTMLBodyElement;
-    createElement(tagName: "br"): HTMLBRElement;
-    createElement(tagName: "button"): HTMLButtonElement;
-    createElement(tagName: "canvas"): HTMLCanvasElement;
-    createElement(tagName: "caption"): HTMLTableCaptionElement;
-    createElement(tagName: "col"): HTMLTableColElement;
-    createElement(tagName: "colgroup"): HTMLTableColElement;
-    createElement(tagName: "datalist"): HTMLDataListElement;
-    createElement(tagName: "del"): HTMLModElement;
-    createElement(tagName: "dir"): HTMLDirectoryElement;
-    createElement(tagName: "div"): HTMLDivElement;
-    createElement(tagName: "dl"): HTMLDListElement;
-    createElement(tagName: "embed"): HTMLEmbedElement;
-    createElement(tagName: "fieldset"): HTMLFieldSetElement;
-    createElement(tagName: "font"): HTMLFontElement;
-    createElement(tagName: "form"): HTMLFormElement;
-    createElement(tagName: "frame"): HTMLFrameElement;
-    createElement(tagName: "frameset"): HTMLFrameSetElement;
-    createElement(tagName: "h1"): HTMLHeadingElement;
-    createElement(tagName: "h2"): HTMLHeadingElement;
-    createElement(tagName: "h3"): HTMLHeadingElement;
-    createElement(tagName: "h4"): HTMLHeadingElement;
-    createElement(tagName: "h5"): HTMLHeadingElement;
-    createElement(tagName: "h6"): HTMLHeadingElement;
-    createElement(tagName: "head"): HTMLHeadElement;
-    createElement(tagName: "hr"): HTMLHRElement;
-    createElement(tagName: "html"): HTMLHtmlElement;
-    createElement(tagName: "iframe"): HTMLIFrameElement;
-    createElement(tagName: "img"): HTMLImageElement;
-    createElement(tagName: "input"): HTMLInputElement;
-    createElement(tagName: "ins"): HTMLModElement;
-    createElement(tagName: "isindex"): HTMLUnknownElement;
-    createElement(tagName: "label"): HTMLLabelElement;
-    createElement(tagName: "legend"): HTMLLegendElement;
-    createElement(tagName: "li"): HTMLLIElement;
-    createElement(tagName: "link"): HTMLLinkElement;
-    createElement(tagName: "listing"): HTMLPreElement;
-    createElement(tagName: "map"): HTMLMapElement;
-    createElement(tagName: "marquee"): HTMLMarqueeElement;
-    createElement(tagName: "menu"): HTMLMenuElement;
-    createElement(tagName: "meta"): HTMLMetaElement;
-    createElement(tagName: "meter"): HTMLMeterElement;
-    createElement(tagName: "nextid"): HTMLUnknownElement;
-    createElement(tagName: "object"): HTMLObjectElement;
-    createElement(tagName: "ol"): HTMLOListElement;
-    createElement(tagName: "optgroup"): HTMLOptGroupElement;
-    createElement(tagName: "option"): HTMLOptionElement;
-    createElement(tagName: "p"): HTMLParagraphElement;
-    createElement(tagName: "param"): HTMLParamElement;
-    createElement(tagName: "picture"): HTMLPictureElement;
-    createElement(tagName: "pre"): HTMLPreElement;
-    createElement(tagName: "progress"): HTMLProgressElement;
-    createElement(tagName: "q"): HTMLQuoteElement;
-    createElement(tagName: "script"): HTMLScriptElement;
-    createElement(tagName: "select"): HTMLSelectElement;
-    createElement(tagName: "source"): HTMLSourceElement;
-    createElement(tagName: "span"): HTMLSpanElement;
-    createElement(tagName: "style"): HTMLStyleElement;
-    createElement(tagName: "table"): HTMLTableElement;
-    createElement(tagName: "tbody"): HTMLTableSectionElement;
-    createElement(tagName: "td"): HTMLTableDataCellElement;
-    createElement(tagName: "template"): HTMLTemplateElement;
-    createElement(tagName: "textarea"): HTMLTextAreaElement;
-    createElement(tagName: "tfoot"): HTMLTableSectionElement;
-    createElement(tagName: "th"): HTMLTableHeaderCellElement;
-    createElement(tagName: "thead"): HTMLTableSectionElement;
-    createElement(tagName: "title"): HTMLTitleElement;
-    createElement(tagName: "tr"): HTMLTableRowElement;
-    createElement(tagName: "track"): HTMLTrackElement;
-    createElement(tagName: "ul"): HTMLUListElement;
-    createElement(tagName: "video"): HTMLVideoElement;
-    createElement(tagName: "x-ms-webview"): MSHTMLWebViewElement;
-    createElement(tagName: "xmp"): HTMLPreElement;
-    createElement(tagName: string): HTMLElement;
-    createElementNS(namespaceURI: "http://www.w3.org/1999/xhtml", qualifiedName: string): HTMLElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "a"): SVGAElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "circle"): SVGCircleElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "clipPath"): SVGClipPathElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "componentTransferFunction"): SVGComponentTransferFunctionElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "defs"): SVGDefsElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "desc"): SVGDescElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "ellipse"): SVGEllipseElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feBlend"): SVGFEBlendElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feColorMatrix"): SVGFEColorMatrixElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feComponentTransfer"): SVGFEComponentTransferElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feComposite"): SVGFECompositeElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feConvolveMatrix"): SVGFEConvolveMatrixElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feDiffuseLighting"): SVGFEDiffuseLightingElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feDisplacementMap"): SVGFEDisplacementMapElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feDistantLight"): SVGFEDistantLightElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feFlood"): SVGFEFloodElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feFuncA"): SVGFEFuncAElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feFuncB"): SVGFEFuncBElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feFuncG"): SVGFEFuncGElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feFuncR"): SVGFEFuncRElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feGaussianBlur"): SVGFEGaussianBlurElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feImage"): SVGFEImageElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feMerge"): SVGFEMergeElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feMergeNode"): SVGFEMergeNodeElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feMorphology"): SVGFEMorphologyElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feOffset"): SVGFEOffsetElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "fePointLight"): SVGFEPointLightElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feSpecularLighting"): SVGFESpecularLightingElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feSpotLight"): SVGFESpotLightElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feTile"): SVGFETileElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feTurbulence"): SVGFETurbulenceElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "filter"): SVGFilterElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "foreignObject"): SVGForeignObjectElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "g"): SVGGElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "image"): SVGImageElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "gradient"): SVGGradientElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "line"): SVGLineElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "linearGradient"): SVGLinearGradientElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "marker"): SVGMarkerElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "mask"): SVGMaskElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "path"): SVGPathElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "metadata"): SVGMetadataElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "pattern"): SVGPatternElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "polygon"): SVGPolygonElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "polyline"): SVGPolylineElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "radialGradient"): SVGRadialGradientElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "rect"): SVGRectElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "svg"): SVGSVGElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "script"): SVGScriptElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "stop"): SVGStopElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "style"): SVGStyleElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "switch"): SVGSwitchElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "symbol"): SVGSymbolElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "tspan"): SVGTSpanElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "textContent"): SVGTextContentElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "text"): SVGTextElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "textPath"): SVGTextPathElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "textPositioning"): SVGTextPositioningElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "title"): SVGTitleElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "use"): SVGUseElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "view"): SVGViewElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: string): SVGElement
-    createElementNS(namespaceURI: string | null, qualifiedName: string): Element;
-    createExpression(expression: string, resolver: XPathNSResolver): XPathExpression;
-    createNSResolver(nodeResolver: Node): XPathNSResolver;
-    /**
-      * Creates a NodeIterator object that you can use to traverse filtered lists of nodes or elements in a document. 
-      * @param root The root element or node to start traversing on.
-      * @param whatToShow The type of nodes or elements to appear in the node list
-      * @param filter A custom NodeFilter function to use. For more information, see filter. Use null for no filter.
-      * @param entityReferenceExpansion A flag that specifies whether entity reference nodes are expanded.
-      */
-    createNodeIterator(root: Node, whatToShow?: number, filter?: NodeFilter, entityReferenceExpansion?: boolean): NodeIterator;
-    createProcessingInstruction(target: string, data: string): ProcessingInstruction;
-    /**
-      *  Returns an empty range object that has both of its boundary points positioned at the beginning of the document. 
-      */
-    createRange(): Range;
-    /**
-      * Creates a text string from the specified value. 
-      * @param data String that specifies the nodeValue property of the text node.
-      */
-    createTextNode(data: string): Text;
-    createTouch(view: Window, target: EventTarget, identifier: number, pageX: number, pageY: number, screenX: number, screenY: number): Touch;
-    createTouchList(...touches: Touch[]): TouchList;
-    /**
-      * Creates a TreeWalker object that you can use to traverse filtered lists of nodes or elements in a document.
-      * @param root The root element or node to start traversing on.
-      * @param whatToShow The type of nodes or elements to appear in the node list. For more information, see whatToShow.
-      * @param filter A custom NodeFilter function to use.
-      * @param entityReferenceExpansion A flag that specifies whether entity reference nodes are expanded.
-      */
-    createTreeWalker(root: Node, whatToShow?: number, filter?: NodeFilter, entityReferenceExpansion?: boolean): TreeWalker;
-    /**
-      * Returns the element for the specified x coordinate and the specified y coordinate. 
-      * @param x The x-offset
-      * @param y The y-offset
-      */
-    elementFromPoint(x: number, y: number): Element;
-    evaluate(expression: string, contextNode: Node, resolver: XPathNSResolver, type: number, result: XPathResult): XPathResult;
-    /**
-      * Executes a command on the current document, current selection, or the given range.
-      * @param commandId String that specifies the command to execute. This command can be any of the command identifiers that can be executed in script.
-      * @param showUI Display the user interface, defaults to false.
-      * @param value Value to assign.
-      */
-    execCommand(commandId: string, showUI?: boolean, value?: any): boolean;
-    /**
-      * Displays help information for the given command identifier.
-      * @param commandId Displays help information for the given command identifier.
-      */
-    execCommandShowHelp(commandId: string): boolean;
-    exitFullscreen(): void;
-    exitPointerLock(): void;
-    /**
-      * Causes the element to receive the focus and executes the code specified by the onfocus event.
-      */
-    focus(): void;
-    /**
-      * Returns a reference to the first object with the specified value of the ID or NAME attribute.
-      * @param elementId String that specifies the ID value. Case-insensitive.
-      */
-    getElementById(elementId: string): HTMLElement | null;
-    getElementsByClassName(classNames: string): HTMLCollectionOf<Element>;
-    /**
-      * Gets a collection of objects based on the value of the NAME or ID attribute.
-      * @param elementName Gets a collection of objects based on the value of the NAME or ID attribute.
-      */
-    getElementsByName(elementName: string): NodeListOf<HTMLElement>;
-    /**
-      * Retrieves a collection of objects based on the specified element name.
-      * @param name Specifies the name of an element.
-      */
-    getElementsByTagName(tagname: "a"): NodeListOf<HTMLAnchorElement>;
-    getElementsByTagName(tagname: "abbr"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "acronym"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "address"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "applet"): NodeListOf<HTMLAppletElement>;
-    getElementsByTagName(tagname: "area"): NodeListOf<HTMLAreaElement>;
-    getElementsByTagName(tagname: "article"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "aside"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "audio"): NodeListOf<HTMLAudioElement>;
-    getElementsByTagName(tagname: "b"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "base"): NodeListOf<HTMLBaseElement>;
-    getElementsByTagName(tagname: "basefont"): NodeListOf<HTMLBaseFontElement>;
-    getElementsByTagName(tagname: "bdo"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "big"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "blockquote"): NodeListOf<HTMLQuoteElement>;
-    getElementsByTagName(tagname: "body"): NodeListOf<HTMLBodyElement>;
-    getElementsByTagName(tagname: "br"): NodeListOf<HTMLBRElement>;
-    getElementsByTagName(tagname: "button"): NodeListOf<HTMLButtonElement>;
-    getElementsByTagName(tagname: "canvas"): NodeListOf<HTMLCanvasElement>;
-    getElementsByTagName(tagname: "caption"): NodeListOf<HTMLTableCaptionElement>;
-    getElementsByTagName(tagname: "center"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "circle"): NodeListOf<SVGCircleElement>;
-    getElementsByTagName(tagname: "cite"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "clippath"): NodeListOf<SVGClipPathElement>;
-    getElementsByTagName(tagname: "code"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "col"): NodeListOf<HTMLTableColElement>;
-    getElementsByTagName(tagname: "colgroup"): NodeListOf<HTMLTableColElement>;
-    getElementsByTagName(tagname: "datalist"): NodeListOf<HTMLDataListElement>;
-    getElementsByTagName(tagname: "dd"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "defs"): NodeListOf<SVGDefsElement>;
-    getElementsByTagName(tagname: "del"): NodeListOf<HTMLModElement>;
-    getElementsByTagName(tagname: "desc"): NodeListOf<SVGDescElement>;
-    getElementsByTagName(tagname: "dfn"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "dir"): NodeListOf<HTMLDirectoryElement>;
-    getElementsByTagName(tagname: "div"): NodeListOf<HTMLDivElement>;
-    getElementsByTagName(tagname: "dl"): NodeListOf<HTMLDListElement>;
-    getElementsByTagName(tagname: "dt"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "ellipse"): NodeListOf<SVGEllipseElement>;
-    getElementsByTagName(tagname: "em"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "embed"): NodeListOf<HTMLEmbedElement>;
-    getElementsByTagName(tagname: "feblend"): NodeListOf<SVGFEBlendElement>;
-    getElementsByTagName(tagname: "fecolormatrix"): NodeListOf<SVGFEColorMatrixElement>;
-    getElementsByTagName(tagname: "fecomponenttransfer"): NodeListOf<SVGFEComponentTransferElement>;
-    getElementsByTagName(tagname: "fecomposite"): NodeListOf<SVGFECompositeElement>;
-    getElementsByTagName(tagname: "feconvolvematrix"): NodeListOf<SVGFEConvolveMatrixElement>;
-    getElementsByTagName(tagname: "fediffuselighting"): NodeListOf<SVGFEDiffuseLightingElement>;
-    getElementsByTagName(tagname: "fedisplacementmap"): NodeListOf<SVGFEDisplacementMapElement>;
-    getElementsByTagName(tagname: "fedistantlight"): NodeListOf<SVGFEDistantLightElement>;
-    getElementsByTagName(tagname: "feflood"): NodeListOf<SVGFEFloodElement>;
-    getElementsByTagName(tagname: "fefunca"): NodeListOf<SVGFEFuncAElement>;
-    getElementsByTagName(tagname: "fefuncb"): NodeListOf<SVGFEFuncBElement>;
-    getElementsByTagName(tagname: "fefuncg"): NodeListOf<SVGFEFuncGElement>;
-    getElementsByTagName(tagname: "fefuncr"): NodeListOf<SVGFEFuncRElement>;
-    getElementsByTagName(tagname: "fegaussianblur"): NodeListOf<SVGFEGaussianBlurElement>;
-    getElementsByTagName(tagname: "feimage"): NodeListOf<SVGFEImageElement>;
-    getElementsByTagName(tagname: "femerge"): NodeListOf<SVGFEMergeElement>;
-    getElementsByTagName(tagname: "femergenode"): NodeListOf<SVGFEMergeNodeElement>;
-    getElementsByTagName(tagname: "femorphology"): NodeListOf<SVGFEMorphologyElement>;
-    getElementsByTagName(tagname: "feoffset"): NodeListOf<SVGFEOffsetElement>;
-    getElementsByTagName(tagname: "fepointlight"): NodeListOf<SVGFEPointLightElement>;
-    getElementsByTagName(tagname: "fespecularlighting"): NodeListOf<SVGFESpecularLightingElement>;
-    getElementsByTagName(tagname: "fespotlight"): NodeListOf<SVGFESpotLightElement>;
-    getElementsByTagName(tagname: "fetile"): NodeListOf<SVGFETileElement>;
-    getElementsByTagName(tagname: "feturbulence"): NodeListOf<SVGFETurbulenceElement>;
-    getElementsByTagName(tagname: "fieldset"): NodeListOf<HTMLFieldSetElement>;
-    getElementsByTagName(tagname: "figcaption"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "figure"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "filter"): NodeListOf<SVGFilterElement>;
-    getElementsByTagName(tagname: "font"): NodeListOf<HTMLFontElement>;
-    getElementsByTagName(tagname: "footer"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "foreignobject"): NodeListOf<SVGForeignObjectElement>;
-    getElementsByTagName(tagname: "form"): NodeListOf<HTMLFormElement>;
-    getElementsByTagName(tagname: "frame"): NodeListOf<HTMLFrameElement>;
-    getElementsByTagName(tagname: "frameset"): NodeListOf<HTMLFrameSetElement>;
-    getElementsByTagName(tagname: "g"): NodeListOf<SVGGElement>;
-    getElementsByTagName(tagname: "h1"): NodeListOf<HTMLHeadingElement>;
-    getElementsByTagName(tagname: "h2"): NodeListOf<HTMLHeadingElement>;
-    getElementsByTagName(tagname: "h3"): NodeListOf<HTMLHeadingElement>;
-    getElementsByTagName(tagname: "h4"): NodeListOf<HTMLHeadingElement>;
-    getElementsByTagName(tagname: "h5"): NodeListOf<HTMLHeadingElement>;
-    getElementsByTagName(tagname: "h6"): NodeListOf<HTMLHeadingElement>;
-    getElementsByTagName(tagname: "head"): NodeListOf<HTMLHeadElement>;
-    getElementsByTagName(tagname: "header"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "hgroup"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "hr"): NodeListOf<HTMLHRElement>;
-    getElementsByTagName(tagname: "html"): NodeListOf<HTMLHtmlElement>;
-    getElementsByTagName(tagname: "i"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "iframe"): NodeListOf<HTMLIFrameElement>;
-    getElementsByTagName(tagname: "image"): NodeListOf<SVGImageElement>;
-    getElementsByTagName(tagname: "img"): NodeListOf<HTMLImageElement>;
-    getElementsByTagName(tagname: "input"): NodeListOf<HTMLInputElement>;
-    getElementsByTagName(tagname: "ins"): NodeListOf<HTMLModElement>;
-    getElementsByTagName(tagname: "isindex"): NodeListOf<HTMLUnknownElement>;
-    getElementsByTagName(tagname: "kbd"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "keygen"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "label"): NodeListOf<HTMLLabelElement>;
-    getElementsByTagName(tagname: "legend"): NodeListOf<HTMLLegendElement>;
-    getElementsByTagName(tagname: "li"): NodeListOf<HTMLLIElement>;
-    getElementsByTagName(tagname: "line"): NodeListOf<SVGLineElement>;
-    getElementsByTagName(tagname: "lineargradient"): NodeListOf<SVGLinearGradientElement>;
-    getElementsByTagName(tagname: "link"): NodeListOf<HTMLLinkElement>;
-    getElementsByTagName(tagname: "listing"): NodeListOf<HTMLPreElement>;
-    getElementsByTagName(tagname: "map"): NodeListOf<HTMLMapElement>;
-    getElementsByTagName(tagname: "mark"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "marker"): NodeListOf<SVGMarkerElement>;
-    getElementsByTagName(tagname: "marquee"): NodeListOf<HTMLMarqueeElement>;
-    getElementsByTagName(tagname: "mask"): NodeListOf<SVGMaskElement>;
-    getElementsByTagName(tagname: "menu"): NodeListOf<HTMLMenuElement>;
-    getElementsByTagName(tagname: "meta"): NodeListOf<HTMLMetaElement>;
-    getElementsByTagName(tagname: "metadata"): NodeListOf<SVGMetadataElement>;
-    getElementsByTagName(tagname: "meter"): NodeListOf<HTMLMeterElement>;
-    getElementsByTagName(tagname: "nav"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "nextid"): NodeListOf<HTMLUnknownElement>;
-    getElementsByTagName(tagname: "nobr"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "noframes"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "noscript"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "object"): NodeListOf<HTMLObjectElement>;
-    getElementsByTagName(tagname: "ol"): NodeListOf<HTMLOListElement>;
-    getElementsByTagName(tagname: "optgroup"): NodeListOf<HTMLOptGroupElement>;
-    getElementsByTagName(tagname: "option"): NodeListOf<HTMLOptionElement>;
-    getElementsByTagName(tagname: "p"): NodeListOf<HTMLParagraphElement>;
-    getElementsByTagName(tagname: "param"): NodeListOf<HTMLParamElement>;
-    getElementsByTagName(tagname: "path"): NodeListOf<SVGPathElement>;
-    getElementsByTagName(tagname: "pattern"): NodeListOf<SVGPatternElement>;
-    getElementsByTagName(tagname: "picture"): NodeListOf<HTMLPictureElement>;
-    getElementsByTagName(tagname: "plaintext"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "polygon"): NodeListOf<SVGPolygonElement>;
-    getElementsByTagName(tagname: "polyline"): NodeListOf<SVGPolylineElement>;
-    getElementsByTagName(tagname: "pre"): NodeListOf<HTMLPreElement>;
-    getElementsByTagName(tagname: "progress"): NodeListOf<HTMLProgressElement>;
-    getElementsByTagName(tagname: "q"): NodeListOf<HTMLQuoteElement>;
-    getElementsByTagName(tagname: "radialgradient"): NodeListOf<SVGRadialGradientElement>;
-    getElementsByTagName(tagname: "rect"): NodeListOf<SVGRectElement>;
-    getElementsByTagName(tagname: "rt"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "ruby"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "s"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "samp"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "script"): NodeListOf<HTMLScriptElement>;
-    getElementsByTagName(tagname: "section"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "select"): NodeListOf<HTMLSelectElement>;
-    getElementsByTagName(tagname: "small"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "source"): NodeListOf<HTMLSourceElement>;
-    getElementsByTagName(tagname: "span"): NodeListOf<HTMLSpanElement>;
-    getElementsByTagName(tagname: "stop"): NodeListOf<SVGStopElement>;
-    getElementsByTagName(tagname: "strike"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "strong"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "style"): NodeListOf<HTMLStyleElement>;
-    getElementsByTagName(tagname: "sub"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "sup"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "svg"): NodeListOf<SVGSVGElement>;
-    getElementsByTagName(tagname: "switch"): NodeListOf<SVGSwitchElement>;
-    getElementsByTagName(tagname: "symbol"): NodeListOf<SVGSymbolElement>;
-    getElementsByTagName(tagname: "table"): NodeListOf<HTMLTableElement>;
-    getElementsByTagName(tagname: "tbody"): NodeListOf<HTMLTableSectionElement>;
-    getElementsByTagName(tagname: "td"): NodeListOf<HTMLTableDataCellElement>;
-    getElementsByTagName(tagname: "template"): NodeListOf<HTMLTemplateElement>;
-    getElementsByTagName(tagname: "text"): NodeListOf<SVGTextElement>;
-    getElementsByTagName(tagname: "textpath"): NodeListOf<SVGTextPathElement>;
-    getElementsByTagName(tagname: "textarea"): NodeListOf<HTMLTextAreaElement>;
-    getElementsByTagName(tagname: "tfoot"): NodeListOf<HTMLTableSectionElement>;
-    getElementsByTagName(tagname: "th"): NodeListOf<HTMLTableHeaderCellElement>;
-    getElementsByTagName(tagname: "thead"): NodeListOf<HTMLTableSectionElement>;
-    getElementsByTagName(tagname: "title"): NodeListOf<HTMLTitleElement>;
-    getElementsByTagName(tagname: "tr"): NodeListOf<HTMLTableRowElement>;
-    getElementsByTagName(tagname: "track"): NodeListOf<HTMLTrackElement>;
-    getElementsByTagName(tagname: "tspan"): NodeListOf<SVGTSpanElement>;
-    getElementsByTagName(tagname: "tt"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "u"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "ul"): NodeListOf<HTMLUListElement>;
-    getElementsByTagName(tagname: "use"): NodeListOf<SVGUseElement>;
-    getElementsByTagName(tagname: "var"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "video"): NodeListOf<HTMLVideoElement>;
-    getElementsByTagName(tagname: "view"): NodeListOf<SVGViewElement>;
-    getElementsByTagName(tagname: "wbr"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "x-ms-webview"): NodeListOf<MSHTMLWebViewElement>;
-    getElementsByTagName(tagname: "xmp"): NodeListOf<HTMLPreElement>;
-    getElementsByTagName(tagname: string): NodeListOf<Element>;
-    getElementsByTagNameNS(namespaceURI: "http://www.w3.org/1999/xhtml", localName: string): HTMLCollectionOf<HTMLElement>;
-    getElementsByTagNameNS(namespaceURI: "http://www.w3.org/2000/svg", localName: string): HTMLCollectionOf<SVGElement>;
-    getElementsByTagNameNS(namespaceURI: string, localName: string): HTMLCollectionOf<Element>;
-    /**
-      * Returns an object representing the current selection of the document that is loaded into the object displaying a webpage.
-      */
-    getSelection(): Selection;
-    /**
-      * Gets a value indicating whether the object currently has focus.
-      */
-    hasFocus(): boolean;
-    importNode(importedNode: Node, deep: boolean): Node;
-    msElementsFromPoint(x: number, y: number): NodeListOf<Element>;
-    msElementsFromRect(left: number, top: number, width: number, height: number): NodeListOf<Element>;
-    /**
-      * Opens a new window and loads a document specified by a given URL. Also, opens a new window that uses the url parameter and the name parameter to collect the output of the write method and the writeln method.
-      * @param url Specifies a MIME type for the document.
-      * @param name Specifies the name of the window. This name is used as the value for the TARGET attribute on a form or an anchor element.
-      * @param features Contains a list of items separated by commas. Each item consists of an option and a value, separated by an equals sign (for example, "fullscreen=yes, toolbar=yes"). The following values are supported.
-      * @param replace Specifies whether the existing entry for the document is replaced in the history list.
-      */
-    open(url?: string, name?: string, features?: string, replace?: boolean): Document;
-    /** 
-      * Returns a Boolean value that indicates whether a specified command can be successfully executed using execCommand, given the current state of the document.
-      * @param commandId Specifies a command identifier.
-      */
-    queryCommandEnabled(commandId: string): boolean;
-    /**
-      * Returns a Boolean value that indicates whether the specified command is in the indeterminate state.
-      * @param commandId String that specifies a command identifier.
-      */
-    queryCommandIndeterm(commandId: string): boolean;
-    /**
-      * Returns a Boolean value that indicates the current state of the command.
-      * @param commandId String that specifies a command identifier.
-      */
-    queryCommandState(commandId: string): boolean;
-    /**
-      * Returns a Boolean value that indicates whether the current command is supported on the current range.
-      * @param commandId Specifies a command identifier.
-      */
-    queryCommandSupported(commandId: string): boolean;
-    /**
-      * Retrieves the string associated with a command.
-      * @param commandId String that contains the identifier of a command. This can be any command identifier given in the list of Command Identifiers. 
-      */
-    queryCommandText(commandId: string): string;
-    /**
-      * Returns the current value of the document, range, or current selection for the given command.
-      * @param commandId String that specifies a command identifier.
-      */
-    queryCommandValue(commandId: string): string;
-    releaseEvents(): void;
-    /**
-      * Allows updating the print settings for the page.
-      */
-    updateSettings(): void;
-    webkitCancelFullScreen(): void;
-    webkitExitFullscreen(): void;
-    /**
-      * Writes one or more HTML expressions to a document in the specified window. 
-      * @param content Specifies the text and HTML tags to write.
-      */
-    write(...content: string[]): void;
-    /**
-      * Writes one or more HTML expressions, followed by a carriage return, to a document in the specified window. 
-      * @param content The text and HTML tags to write.
-      */
-    writeln(...content: string[]): void;
-    addEventListener(type: "MSContentZoom", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureChange", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureDoubleTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureEnd", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureHold", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSInertiaStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSManipulationStateChanged", listener: (this: this, ev: MSManipulationEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerCancel", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerDown", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerEnter", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerLeave", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerMove", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOut", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOver", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerUp", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "abort", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "activate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforedeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "blur", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplay", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplaythrough", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "change", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "click", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "contextmenu", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dblclick", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "deactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drag", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragend", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragenter", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragleave", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragover", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragstart", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drop", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "durationchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "emptied", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "ended", listener: (this: this, ev: MediaStreamErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "focus", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "fullscreenchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "fullscreenerror", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "input", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "invalid", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "keydown", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keypress", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keyup", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadeddata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadedmetadata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousedown", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousemove", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseout", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseover", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseup", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousewheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mssitemodejumplistitemremoved", listener: (this: this, ev: MSSiteModeEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "msthumbnailclick", listener: (this: this, ev: MSSiteModeEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pause", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "play", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "playing", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointercancel", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerdown", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerenter", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerleave", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerlockchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerlockerror", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointermove", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerout", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerover", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerup", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "progress", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ratechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "readystatechange", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "reset", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "scroll", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeked", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeking", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "select", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "selectionchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "selectstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "stalled", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "stop", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "submit", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "suspend", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "timeupdate", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchcancel", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchend", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchmove", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchstart", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "volumechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "waiting", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenerror", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "wheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var Document: {
-    prototype: Document;
-    new(): Document;
-}
-
-interface DocumentFragment extends Node, NodeSelector, ParentNode {
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var DocumentFragment: {
-    prototype: DocumentFragment;
-    new(): DocumentFragment;
-}
-
-interface DocumentType extends Node, ChildNode {
-    readonly entities: NamedNodeMap;
-    readonly internalSubset: string | null;
-    readonly name: string;
-    readonly notations: NamedNodeMap;
-    readonly publicId: string | null;
-    readonly systemId: string | null;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var DocumentType: {
-    prototype: DocumentType;
-    new(): DocumentType;
-}
-
-interface DragEvent extends MouseEvent {
-    readonly dataTransfer: DataTransfer;
-    initDragEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, ctrlKeyArg: boolean, altKeyArg: boolean, shiftKeyArg: boolean, metaKeyArg: boolean, buttonArg: number, relatedTargetArg: EventTarget, dataTransferArg: DataTransfer): void;
-    msConvertURL(file: File, targetType: string, targetURL?: string): void;
-}
-
-declare var DragEvent: {
-    prototype: DragEvent;
-    new(): DragEvent;
-}
-
-interface DynamicsCompressorNode extends AudioNode {
-    readonly attack: AudioParam;
-    readonly knee: AudioParam;
-    readonly ratio: AudioParam;
-    readonly reduction: AudioParam;
-    readonly release: AudioParam;
-    readonly threshold: AudioParam;
-}
-
-declare var DynamicsCompressorNode: {
-    prototype: DynamicsCompressorNode;
-    new(): DynamicsCompressorNode;
-}
-
-interface EXT_frag_depth {
-}
-
-declare var EXT_frag_depth: {
-    prototype: EXT_frag_depth;
-    new(): EXT_frag_depth;
-}
-
-interface EXT_texture_filter_anisotropic {
-    readonly MAX_TEXTURE_MAX_ANISOTROPY_EXT: number;
-    readonly TEXTURE_MAX_ANISOTROPY_EXT: number;
-}
-
-declare var EXT_texture_filter_anisotropic: {
-    prototype: EXT_texture_filter_anisotropic;
-    new(): EXT_texture_filter_anisotropic;
-    readonly MAX_TEXTURE_MAX_ANISOTROPY_EXT: number;
-    readonly TEXTURE_MAX_ANISOTROPY_EXT: number;
-}
-
-interface Element extends Node, GlobalEventHandlers, ElementTraversal, NodeSelector, ChildNode, ParentNode {
-    readonly classList: DOMTokenList;
-    className: string;
-    readonly clientHeight: number;
-    readonly clientLeft: number;
-    readonly clientTop: number;
-    readonly clientWidth: number;
-    id: string;
-    msContentZoomFactor: number;
-    readonly msRegionOverflow: string;
-    onariarequest: (this: this, ev: AriaRequestEvent) => any;
-    oncommand: (this: this, ev: CommandEvent) => any;
-    ongotpointercapture: (this: this, ev: PointerEvent) => any;
-    onlostpointercapture: (this: this, ev: PointerEvent) => any;
-    onmsgesturechange: (this: this, ev: MSGestureEvent) => any;
-    onmsgesturedoubletap: (this: this, ev: MSGestureEvent) => any;
-    onmsgestureend: (this: this, ev: MSGestureEvent) => any;
-    onmsgesturehold: (this: this, ev: MSGestureEvent) => any;
-    onmsgesturestart: (this: this, ev: MSGestureEvent) => any;
-    onmsgesturetap: (this: this, ev: MSGestureEvent) => any;
-    onmsgotpointercapture: (this: this, ev: MSPointerEvent) => any;
-    onmsinertiastart: (this: this, ev: MSGestureEvent) => any;
-    onmslostpointercapture: (this: this, ev: MSPointerEvent) => any;
-    onmspointercancel: (this: this, ev: MSPointerEvent) => any;
-    onmspointerdown: (this: this, ev: MSPointerEvent) => any;
-    onmspointerenter: (this: this, ev: MSPointerEvent) => any;
-    onmspointerleave: (this: this, ev: MSPointerEvent) => any;
-    onmspointermove: (this: this, ev: MSPointerEvent) => any;
-    onmspointerout: (this: this, ev: MSPointerEvent) => any;
-    onmspointerover: (this: this, ev: MSPointerEvent) => any;
-    onmspointerup: (this: this, ev: MSPointerEvent) => any;
-    ontouchcancel: (ev: TouchEvent) => any;
-    ontouchend: (ev: TouchEvent) => any;
-    ontouchmove: (ev: TouchEvent) => any;
-    ontouchstart: (ev: TouchEvent) => any;
-    onwebkitfullscreenchange: (this: this, ev: Event) => any;
-    onwebkitfullscreenerror: (this: this, ev: Event) => any;
-    readonly prefix: string | null;
-    readonly scrollHeight: number;
-    scrollLeft: number;
-    scrollTop: number;
-    readonly scrollWidth: number;
-    readonly tagName: string;
-    innerHTML: string;
-    getAttribute(name: string): string | null;
-    getAttributeNS(namespaceURI: string, localName: string): string;
-    getAttributeNode(name: string): Attr;
-    getAttributeNodeNS(namespaceURI: string, localName: string): Attr;
-    getBoundingClientRect(): ClientRect;
-    getClientRects(): ClientRectList;
-    getElementsByTagName(name: "a"): NodeListOf<HTMLAnchorElement>;
-    getElementsByTagName(name: "abbr"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "acronym"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "address"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "applet"): NodeListOf<HTMLAppletElement>;
-    getElementsByTagName(name: "area"): NodeListOf<HTMLAreaElement>;
-    getElementsByTagName(name: "article"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "aside"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "audio"): NodeListOf<HTMLAudioElement>;
-    getElementsByTagName(name: "b"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "base"): NodeListOf<HTMLBaseElement>;
-    getElementsByTagName(name: "basefont"): NodeListOf<HTMLBaseFontElement>;
-    getElementsByTagName(name: "bdo"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "big"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "blockquote"): NodeListOf<HTMLQuoteElement>;
-    getElementsByTagName(name: "body"): NodeListOf<HTMLBodyElement>;
-    getElementsByTagName(name: "br"): NodeListOf<HTMLBRElement>;
-    getElementsByTagName(name: "button"): NodeListOf<HTMLButtonElement>;
-    getElementsByTagName(name: "canvas"): NodeListOf<HTMLCanvasElement>;
-    getElementsByTagName(name: "caption"): NodeListOf<HTMLTableCaptionElement>;
-    getElementsByTagName(name: "center"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "circle"): NodeListOf<SVGCircleElement>;
-    getElementsByTagName(name: "cite"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "clippath"): NodeListOf<SVGClipPathElement>;
-    getElementsByTagName(name: "code"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "col"): NodeListOf<HTMLTableColElement>;
-    getElementsByTagName(name: "colgroup"): NodeListOf<HTMLTableColElement>;
-    getElementsByTagName(name: "datalist"): NodeListOf<HTMLDataListElement>;
-    getElementsByTagName(name: "dd"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "defs"): NodeListOf<SVGDefsElement>;
-    getElementsByTagName(name: "del"): NodeListOf<HTMLModElement>;
-    getElementsByTagName(name: "desc"): NodeListOf<SVGDescElement>;
-    getElementsByTagName(name: "dfn"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "dir"): NodeListOf<HTMLDirectoryElement>;
-    getElementsByTagName(name: "div"): NodeListOf<HTMLDivElement>;
-    getElementsByTagName(name: "dl"): NodeListOf<HTMLDListElement>;
-    getElementsByTagName(name: "dt"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "ellipse"): NodeListOf<SVGEllipseElement>;
-    getElementsByTagName(name: "em"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "embed"): NodeListOf<HTMLEmbedElement>;
-    getElementsByTagName(name: "feblend"): NodeListOf<SVGFEBlendElement>;
-    getElementsByTagName(name: "fecolormatrix"): NodeListOf<SVGFEColorMatrixElement>;
-    getElementsByTagName(name: "fecomponenttransfer"): NodeListOf<SVGFEComponentTransferElement>;
-    getElementsByTagName(name: "fecomposite"): NodeListOf<SVGFECompositeElement>;
-    getElementsByTagName(name: "feconvolvematrix"): NodeListOf<SVGFEConvolveMatrixElement>;
-    getElementsByTagName(name: "fediffuselighting"): NodeListOf<SVGFEDiffuseLightingElement>;
-    getElementsByTagName(name: "fedisplacementmap"): NodeListOf<SVGFEDisplacementMapElement>;
-    getElementsByTagName(name: "fedistantlight"): NodeListOf<SVGFEDistantLightElement>;
-    getElementsByTagName(name: "feflood"): NodeListOf<SVGFEFloodElement>;
-    getElementsByTagName(name: "fefunca"): NodeListOf<SVGFEFuncAElement>;
-    getElementsByTagName(name: "fefuncb"): NodeListOf<SVGFEFuncBElement>;
-    getElementsByTagName(name: "fefuncg"): NodeListOf<SVGFEFuncGElement>;
-    getElementsByTagName(name: "fefuncr"): NodeListOf<SVGFEFuncRElement>;
-    getElementsByTagName(name: "fegaussianblur"): NodeListOf<SVGFEGaussianBlurElement>;
-    getElementsByTagName(name: "feimage"): NodeListOf<SVGFEImageElement>;
-    getElementsByTagName(name: "femerge"): NodeListOf<SVGFEMergeElement>;
-    getElementsByTagName(name: "femergenode"): NodeListOf<SVGFEMergeNodeElement>;
-    getElementsByTagName(name: "femorphology"): NodeListOf<SVGFEMorphologyElement>;
-    getElementsByTagName(name: "feoffset"): NodeListOf<SVGFEOffsetElement>;
-    getElementsByTagName(name: "fepointlight"): NodeListOf<SVGFEPointLightElement>;
-    getElementsByTagName(name: "fespecularlighting"): NodeListOf<SVGFESpecularLightingElement>;
-    getElementsByTagName(name: "fespotlight"): NodeListOf<SVGFESpotLightElement>;
-    getElementsByTagName(name: "fetile"): NodeListOf<SVGFETileElement>;
-    getElementsByTagName(name: "feturbulence"): NodeListOf<SVGFETurbulenceElement>;
-    getElementsByTagName(name: "fieldset"): NodeListOf<HTMLFieldSetElement>;
-    getElementsByTagName(name: "figcaption"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "figure"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "filter"): NodeListOf<SVGFilterElement>;
-    getElementsByTagName(name: "font"): NodeListOf<HTMLFontElement>;
-    getElementsByTagName(name: "footer"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "foreignobject"): NodeListOf<SVGForeignObjectElement>;
-    getElementsByTagName(name: "form"): NodeListOf<HTMLFormElement>;
-    getElementsByTagName(name: "frame"): NodeListOf<HTMLFrameElement>;
-    getElementsByTagName(name: "frameset"): NodeListOf<HTMLFrameSetElement>;
-    getElementsByTagName(name: "g"): NodeListOf<SVGGElement>;
-    getElementsByTagName(name: "h1"): NodeListOf<HTMLHeadingElement>;
-    getElementsByTagName(name: "h2"): NodeListOf<HTMLHeadingElement>;
-    getElementsByTagName(name: "h3"): NodeListOf<HTMLHeadingElement>;
-    getElementsByTagName(name: "h4"): NodeListOf<HTMLHeadingElement>;
-    getElementsByTagName(name: "h5"): NodeListOf<HTMLHeadingElement>;
-    getElementsByTagName(name: "h6"): NodeListOf<HTMLHeadingElement>;
-    getElementsByTagName(name: "head"): NodeListOf<HTMLHeadElement>;
-    getElementsByTagName(name: "header"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "hgroup"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "hr"): NodeListOf<HTMLHRElement>;
-    getElementsByTagName(name: "html"): NodeListOf<HTMLHtmlElement>;
-    getElementsByTagName(name: "i"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "iframe"): NodeListOf<HTMLIFrameElement>;
-    getElementsByTagName(name: "image"): NodeListOf<SVGImageElement>;
-    getElementsByTagName(name: "img"): NodeListOf<HTMLImageElement>;
-    getElementsByTagName(name: "input"): NodeListOf<HTMLInputElement>;
-    getElementsByTagName(name: "ins"): NodeListOf<HTMLModElement>;
-    getElementsByTagName(name: "isindex"): NodeListOf<HTMLUnknownElement>;
-    getElementsByTagName(name: "kbd"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "keygen"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "label"): NodeListOf<HTMLLabelElement>;
-    getElementsByTagName(name: "legend"): NodeListOf<HTMLLegendElement>;
-    getElementsByTagName(name: "li"): NodeListOf<HTMLLIElement>;
-    getElementsByTagName(name: "line"): NodeListOf<SVGLineElement>;
-    getElementsByTagName(name: "lineargradient"): NodeListOf<SVGLinearGradientElement>;
-    getElementsByTagName(name: "link"): NodeListOf<HTMLLinkElement>;
-    getElementsByTagName(name: "listing"): NodeListOf<HTMLPreElement>;
-    getElementsByTagName(name: "map"): NodeListOf<HTMLMapElement>;
-    getElementsByTagName(name: "mark"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "marker"): NodeListOf<SVGMarkerElement>;
-    getElementsByTagName(name: "marquee"): NodeListOf<HTMLMarqueeElement>;
-    getElementsByTagName(name: "mask"): NodeListOf<SVGMaskElement>;
-    getElementsByTagName(name: "menu"): NodeListOf<HTMLMenuElement>;
-    getElementsByTagName(name: "meta"): NodeListOf<HTMLMetaElement>;
-    getElementsByTagName(name: "metadata"): NodeListOf<SVGMetadataElement>;
-    getElementsByTagName(name: "meter"): NodeListOf<HTMLMeterElement>;
-    getElementsByTagName(name: "nav"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "nextid"): NodeListOf<HTMLUnknownElement>;
-    getElementsByTagName(name: "nobr"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "noframes"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "noscript"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "object"): NodeListOf<HTMLObjectElement>;
-    getElementsByTagName(name: "ol"): NodeListOf<HTMLOListElement>;
-    getElementsByTagName(name: "optgroup"): NodeListOf<HTMLOptGroupElement>;
-    getElementsByTagName(name: "option"): NodeListOf<HTMLOptionElement>;
-    getElementsByTagName(name: "p"): NodeListOf<HTMLParagraphElement>;
-    getElementsByTagName(name: "param"): NodeListOf<HTMLParamElement>;
-    getElementsByTagName(name: "path"): NodeListOf<SVGPathElement>;
-    getElementsByTagName(name: "pattern"): NodeListOf<SVGPatternElement>;
-    getElementsByTagName(name: "picture"): NodeListOf<HTMLPictureElement>;
-    getElementsByTagName(name: "plaintext"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "polygon"): NodeListOf<SVGPolygonElement>;
-    getElementsByTagName(name: "polyline"): NodeListOf<SVGPolylineElement>;
-    getElementsByTagName(name: "pre"): NodeListOf<HTMLPreElement>;
-    getElementsByTagName(name: "progress"): NodeListOf<HTMLProgressElement>;
-    getElementsByTagName(name: "q"): NodeListOf<HTMLQuoteElement>;
-    getElementsByTagName(name: "radialgradient"): NodeListOf<SVGRadialGradientElement>;
-    getElementsByTagName(name: "rect"): NodeListOf<SVGRectElement>;
-    getElementsByTagName(name: "rt"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "ruby"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "s"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "samp"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "script"): NodeListOf<HTMLScriptElement>;
-    getElementsByTagName(name: "section"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "select"): NodeListOf<HTMLSelectElement>;
-    getElementsByTagName(name: "small"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "source"): NodeListOf<HTMLSourceElement>;
-    getElementsByTagName(name: "span"): NodeListOf<HTMLSpanElement>;
-    getElementsByTagName(name: "stop"): NodeListOf<SVGStopElement>;
-    getElementsByTagName(name: "strike"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "strong"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "style"): NodeListOf<HTMLStyleElement>;
-    getElementsByTagName(name: "sub"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "sup"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "svg"): NodeListOf<SVGSVGElement>;
-    getElementsByTagName(name: "switch"): NodeListOf<SVGSwitchElement>;
-    getElementsByTagName(name: "symbol"): NodeListOf<SVGSymbolElement>;
-    getElementsByTagName(name: "table"): NodeListOf<HTMLTableElement>;
-    getElementsByTagName(name: "tbody"): NodeListOf<HTMLTableSectionElement>;
-    getElementsByTagName(name: "td"): NodeListOf<HTMLTableDataCellElement>;
-    getElementsByTagName(name: "template"): NodeListOf<HTMLTemplateElement>;
-    getElementsByTagName(name: "text"): NodeListOf<SVGTextElement>;
-    getElementsByTagName(name: "textpath"): NodeListOf<SVGTextPathElement>;
-    getElementsByTagName(name: "textarea"): NodeListOf<HTMLTextAreaElement>;
-    getElementsByTagName(name: "tfoot"): NodeListOf<HTMLTableSectionElement>;
-    getElementsByTagName(name: "th"): NodeListOf<HTMLTableHeaderCellElement>;
-    getElementsByTagName(name: "thead"): NodeListOf<HTMLTableSectionElement>;
-    getElementsByTagName(name: "title"): NodeListOf<HTMLTitleElement>;
-    getElementsByTagName(name: "tr"): NodeListOf<HTMLTableRowElement>;
-    getElementsByTagName(name: "track"): NodeListOf<HTMLTrackElement>;
-    getElementsByTagName(name: "tspan"): NodeListOf<SVGTSpanElement>;
-    getElementsByTagName(name: "tt"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "u"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "ul"): NodeListOf<HTMLUListElement>;
-    getElementsByTagName(name: "use"): NodeListOf<SVGUseElement>;
-    getElementsByTagName(name: "var"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "video"): NodeListOf<HTMLVideoElement>;
-    getElementsByTagName(name: "view"): NodeListOf<SVGViewElement>;
-    getElementsByTagName(name: "wbr"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "x-ms-webview"): NodeListOf<MSHTMLWebViewElement>;
-    getElementsByTagName(name: "xmp"): NodeListOf<HTMLPreElement>;
-    getElementsByTagName(name: string): NodeListOf<Element>;
-    getElementsByTagNameNS(namespaceURI: "http://www.w3.org/1999/xhtml", localName: string): HTMLCollectionOf<HTMLElement>;
-    getElementsByTagNameNS(namespaceURI: "http://www.w3.org/2000/svg", localName: string): HTMLCollectionOf<SVGElement>;
-    getElementsByTagNameNS(namespaceURI: string, localName: string): HTMLCollectionOf<Element>;
-    hasAttribute(name: string): boolean;
-    hasAttributeNS(namespaceURI: string, localName: string): boolean;
-    msGetRegionContent(): MSRangeCollection;
-    msGetUntransformedBounds(): ClientRect;
-    msMatchesSelector(selectors: string): boolean;
-    msReleasePointerCapture(pointerId: number): void;
-    msSetPointerCapture(pointerId: number): void;
-    msZoomTo(args: MsZoomToOptions): void;
-    releasePointerCapture(pointerId: number): void;
-    removeAttribute(name?: string): void;
-    removeAttributeNS(namespaceURI: string, localName: string): void;
-    removeAttributeNode(oldAttr: Attr): Attr;
-    requestFullscreen(): void;
-    requestPointerLock(): void;
-    setAttribute(name: string, value: string): void;
-    setAttributeNS(namespaceURI: string, qualifiedName: string, value: string): void;
-    setAttributeNode(newAttr: Attr): Attr;
-    setAttributeNodeNS(newAttr: Attr): Attr;
-    setPointerCapture(pointerId: number): void;
-    webkitMatchesSelector(selectors: string): boolean;
-    webkitRequestFullScreen(): void;
-    webkitRequestFullscreen(): void;
-    getElementsByClassName(classNames: string): NodeListOf<Element>;
-    matches(selector: string): boolean;
-    closest(selector: string): Element | null;
-    scrollIntoView(arg?: boolean | ScrollIntoViewOptions): void;
-    scroll(options?: ScrollToOptions): void;
-    scroll(x: number, y: number): void;
-    scrollTo(options?: ScrollToOptions): void;
-    scrollTo(x: number, y: number): void;
-    scrollBy(options?: ScrollToOptions): void;
-    scrollBy(x: number, y: number): void;
-    insertAdjacentElement(position: string, insertedElement: Element): Element | null;
-    insertAdjacentHTML(where: string, html: string): void;
-    insertAdjacentText(where: string, text: string): void;
-    addEventListener(type: "MSGestureChange", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureDoubleTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureEnd", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureHold", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGotPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSInertiaStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSLostPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerCancel", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerDown", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerEnter", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerLeave", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerMove", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOut", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOver", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerUp", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ariarequest", listener: (this: this, ev: AriaRequestEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "command", listener: (this: this, ev: CommandEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "gotpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "lostpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointercancel", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerdown", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerenter", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerleave", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointermove", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerout", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerover", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerup", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchcancel", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchend", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchmove", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchstart", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenerror", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "wheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var Element: {
-    prototype: Element;
-    new(): Element;
-}
-
-interface ErrorEvent extends Event {
-    readonly colno: number;
-    readonly error: any;
-    readonly filename: string;
-    readonly lineno: number;
-    readonly message: string;
-    initErrorEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, messageArg: string, filenameArg: string, linenoArg: number): void;
-}
-
-declare var ErrorEvent: {
-    prototype: ErrorEvent;
-    new(): ErrorEvent;
-}
-
-interface Event {
-    readonly bubbles: boolean;
-    cancelBubble: boolean;
-    readonly cancelable: boolean;
-    readonly currentTarget: EventTarget;
-    readonly defaultPrevented: boolean;
-    readonly eventPhase: number;
-    readonly isTrusted: boolean;
-    returnValue: boolean;
-    readonly srcElement: Element | null;
-    readonly target: EventTarget;
-    readonly timeStamp: number;
-    readonly type: string;
-    initEvent(eventTypeArg: string, canBubbleArg: boolean, cancelableArg: boolean): void;
-    preventDefault(): void;
-    stopImmediatePropagation(): void;
-    stopPropagation(): void;
-    readonly AT_TARGET: number;
-    readonly BUBBLING_PHASE: number;
-    readonly CAPTURING_PHASE: number;
-}
-
-declare var Event: {
-    prototype: Event;
-    new(type: string, eventInitDict?: EventInit): Event;
-    readonly AT_TARGET: number;
-    readonly BUBBLING_PHASE: number;
-    readonly CAPTURING_PHASE: number;
-}
-
-interface EventTarget {
-    addEventListener(type: string, listener?: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-    dispatchEvent(evt: Event): boolean;
-    removeEventListener(type: string, listener?: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var EventTarget: {
-    prototype: EventTarget;
-    new(): EventTarget;
-}
-
-interface External {
-}
-
-declare var External: {
-    prototype: External;
-    new(): External;
-}
-
-interface File extends Blob {
-    readonly lastModifiedDate: any;
-    readonly name: string;
-    readonly webkitRelativePath: string;
-}
-
-declare var File: {
-    prototype: File;
-    new (parts: (ArrayBuffer | ArrayBufferView | Blob | string)[], filename: string, properties?: FilePropertyBag): File;
-}
-
-interface FileList {
-    readonly length: number;
-    item(index: number): File;
-    [index: number]: File;
-}
-
-declare var FileList: {
-    prototype: FileList;
-    new(): FileList;
-}
-
-interface FileReader extends EventTarget, MSBaseReader {
-    readonly error: DOMError;
-    readAsArrayBuffer(blob: Blob): void;
-    readAsBinaryString(blob: Blob): void;
-    readAsDataURL(blob: Blob): void;
-    readAsText(blob: Blob, encoding?: string): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var FileReader: {
-    prototype: FileReader;
-    new(): FileReader;
-}
-
-interface FocusEvent extends UIEvent {
-    readonly relatedTarget: EventTarget;
-    initFocusEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, relatedTargetArg: EventTarget): void;
-}
-
-declare var FocusEvent: {
-    prototype: FocusEvent;
-    new(typeArg: string, eventInitDict?: FocusEventInit): FocusEvent;
-}
-
-interface FormData {
-    append(name: any, value: any, blobName?: string): void;
-}
-
-declare var FormData: {
-    prototype: FormData;
-    new (form?: HTMLFormElement): FormData;
-}
-
-interface GainNode extends AudioNode {
-    readonly gain: AudioParam;
-}
-
-declare var GainNode: {
-    prototype: GainNode;
-    new(): GainNode;
-}
-
-interface Gamepad {
-    readonly axes: number[];
-    readonly buttons: GamepadButton[];
-    readonly connected: boolean;
-    readonly id: string;
-    readonly index: number;
-    readonly mapping: string;
-    readonly timestamp: number;
-}
-
-declare var Gamepad: {
-    prototype: Gamepad;
-    new(): Gamepad;
-}
-
-interface GamepadButton {
-    readonly pressed: boolean;
-    readonly value: number;
-}
-
-declare var GamepadButton: {
-    prototype: GamepadButton;
-    new(): GamepadButton;
-}
-
-interface GamepadEvent extends Event {
-    readonly gamepad: Gamepad;
-}
-
-declare var GamepadEvent: {
-    prototype: GamepadEvent;
-    new(): GamepadEvent;
-}
-
-interface Geolocation {
-    clearWatch(watchId: number): void;
-    getCurrentPosition(successCallback: PositionCallback, errorCallback?: PositionErrorCallback, options?: PositionOptions): void;
-    watchPosition(successCallback: PositionCallback, errorCallback?: PositionErrorCallback, options?: PositionOptions): number;
-}
-
-declare var Geolocation: {
-    prototype: Geolocation;
-    new(): Geolocation;
-}
-
-interface HTMLAllCollection extends HTMLCollection {
-    namedItem(name: string): Element;
-}
-
-declare var HTMLAllCollection: {
-    prototype: HTMLAllCollection;
-    new(): HTMLAllCollection;
-}
-
-interface HTMLAnchorElement extends HTMLElement {
-    Methods: string;
-    /**
-      * Sets or retrieves the character set used to encode the object.
-      */
-    charset: string;
-    /**
-      * Sets or retrieves the coordinates of the object.
-      */
-    coords: string;
-    download: string;
-    /**
-      * Contains the anchor portion of the URL including the hash sign (#).
-      */
-    hash: string;
-    /**
-      * Contains the hostname and port values of the URL.
-      */
-    host: string;
-    /**
-      * Contains the hostname of a URL.
-      */
-    hostname: string;
-    /**
-      * Sets or retrieves a destination URL or an anchor point.
-      */
-    href: string;
-    /**
-      * Sets or retrieves the language code of the object.
-      */
-    hreflang: string;
-    readonly mimeType: string;
-    /**
-      * Sets or retrieves the shape of the object.
-      */
-    name: string;
-    readonly nameProp: string;
-    /**
-      * Contains the pathname of the URL.
-      */
-    pathname: string;
-    /**
-      * Sets or retrieves the port number associated with a URL.
-      */
-    port: string;
-    /**
-      * Contains the protocol of the URL.
-      */
-    protocol: string;
-    readonly protocolLong: string;
-    /**
-      * Sets or retrieves the relationship between the object and the destination of the link.
-      */
-    rel: string;
-    /**
-      * Sets or retrieves the relationship between the object and the destination of the link.
-      */
-    rev: string;
-    /**
-      * Sets or retrieves the substring of the href property that follows the question mark.
-      */
-    search: string;
-    /**
-      * Sets or retrieves the shape of the object.
-      */
-    shape: string;
-    /**
-      * Sets or retrieves the window or frame at which to target content.
-      */
-    target: string;
-    /**
-      * Retrieves or sets the text of the object as a string. 
-      */
-    text: string;
-    type: string;
-    urn: string;
-    /** 
-      * Returns a string representation of an object.
-      */
-    toString(): string;
-}
-
-declare var HTMLAnchorElement: {
-    prototype: HTMLAnchorElement;
-    new(): HTMLAnchorElement;
-}
-
-interface HTMLAppletElement extends HTMLElement {
-    /**
-      * Retrieves a string of the URL where the object tag can be found. This is often the href of the document that the object is in, or the value set by a base element.
-      */
-    readonly BaseHref: string;
-    align: string;
-    /**
-      * Sets or retrieves a text alternative to the graphic.
-      */
-    alt: string;
-    /**
-      * Gets or sets the optional alternative HTML script to execute if the object fails to load.
-      */
-    altHtml: string;
-    /**
-      * Sets or retrieves a character string that can be used to implement your own archive functionality for the object.
-      */
-    archive: string;
-    border: string;
-    code: string;
-    /**
-      * Sets or retrieves the URL of the component.
-      */
-    codeBase: string;
-    /**
-      * Sets or retrieves the Internet media type for the code associated with the object.
-      */
-    codeType: string;
-    /**
-      * Address of a pointer to the document this page or frame contains. If there is no document, then null will be returned.
-      */
-    readonly contentDocument: Document;
-    /**
-      * Sets or retrieves the URL that references the data of the object.
-      */
-    data: string;
-    /**
-      * Sets or retrieves a character string that can be used to implement your own declare functionality for the object.
-      */
-    declare: boolean;
-    readonly form: HTMLFormElement;
-    /**
-      * Sets or retrieves the height of the object.
-      */
-    height: string;
-    hspace: number;
-    /**
-      * Sets or retrieves the shape of the object.
-      */
-    name: string;
-    object: string | null;
-    /**
-      * Sets or retrieves a message to be displayed while an object is loading.
-      */
-    standby: string;
-    /**
-      * Returns the content type of the object.
-      */
-    type: string;
-    /**
-      * Sets or retrieves the URL, often with a bookmark extension (#name), to use as a client-side image map.
-      */
-    useMap: string;
-    vspace: number;
-    width: number;
-}
-
-declare var HTMLAppletElement: {
-    prototype: HTMLAppletElement;
-    new(): HTMLAppletElement;
-}
-
-interface HTMLAreaElement extends HTMLElement {
-    /**
-      * Sets or retrieves a text alternative to the graphic.
-      */
-    alt: string;
-    /**
-      * Sets or retrieves the coordinates of the object.
-      */
-    coords: string;
-    download: string;
-    /**
-      * Sets or retrieves the subsection of the href property that follows the number sign (#).
-      */
-    hash: string;
-    /**
-      * Sets or retrieves the hostname and port number of the location or URL.
-      */
-    host: string;
-    /**
-      * Sets or retrieves the host name part of the location or URL. 
-      */
-    hostname: string;
-    /**
-      * Sets or retrieves a destination URL or an anchor point.
-      */
-    href: string;
-    /**
-      * Sets or gets whether clicks in this region cause action.
-      */
-    noHref: boolean;
-    /**
-      * Sets or retrieves the file name or path specified by the object.
-      */
-    pathname: string;
-    /**
-      * Sets or retrieves the port number associated with a URL.
-      */
-    port: string;
-    /**
-      * Sets or retrieves the protocol portion of a URL.
-      */
-    protocol: string;
-    rel: string;
-    /**
-      * Sets or retrieves the substring of the href property that follows the question mark.
-      */
-    search: string;
-    /**
-      * Sets or retrieves the shape of the object.
-      */
-    shape: string;
-    /**
-      * Sets or retrieves the window or frame at which to target content.
-      */
-    target: string;
-    /** 
-      * Returns a string representation of an object.
-      */
-    toString(): string;
-}
-
-declare var HTMLAreaElement: {
-    prototype: HTMLAreaElement;
-    new(): HTMLAreaElement;
-}
-
-interface HTMLAreasCollection extends HTMLCollection {
-    /**
-      * Adds an element to the areas, controlRange, or options collection.
-      */
-    add(element: HTMLElement, before?: HTMLElement | number): void;
-    /**
-      * Removes an element from the collection.
-      */
-    remove(index?: number): void;
-}
-
-declare var HTMLAreasCollection: {
-    prototype: HTMLAreasCollection;
-    new(): HTMLAreasCollection;
-}
-
-interface HTMLAudioElement extends HTMLMediaElement {
-}
-
-declare var HTMLAudioElement: {
-    prototype: HTMLAudioElement;
-    new(): HTMLAudioElement;
-}
-
-interface HTMLBRElement extends HTMLElement {
-    /**
-      * Sets or retrieves the side on which floating objects are not to be positioned when any IHTMLBlockElement is inserted into the document.
-      */
-    clear: string;
-}
-
-declare var HTMLBRElement: {
-    prototype: HTMLBRElement;
-    new(): HTMLBRElement;
-}
-
-interface HTMLBaseElement extends HTMLElement {
-    /**
-      * Gets or sets the baseline URL on which relative links are based.
-      */
-    href: string;
-    /**
-      * Sets or retrieves the window or frame at which to target content.
-      */
-    target: string;
-}
-
-declare var HTMLBaseElement: {
-    prototype: HTMLBaseElement;
-    new(): HTMLBaseElement;
-}
-
-interface HTMLBaseFontElement extends HTMLElement, DOML2DeprecatedColorProperty {
-    /**
-      * Sets or retrieves the current typeface family.
-      */
-    face: string;
-    /**
-      * Sets or retrieves the font size of the object.
-      */
-    size: number;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLBaseFontElement: {
-    prototype: HTMLBaseFontElement;
-    new(): HTMLBaseFontElement;
-}
-
-interface HTMLBodyElement extends HTMLElement {
-    aLink: any;
-    background: string;
-    bgColor: any;
-    bgProperties: string;
-    link: any;
-    noWrap: boolean;
-    onafterprint: (this: this, ev: Event) => any;
-    onbeforeprint: (this: this, ev: Event) => any;
-    onbeforeunload: (this: this, ev: BeforeUnloadEvent) => any;
-    onblur: (this: this, ev: FocusEvent) => any;
-    onerror: (this: this, ev: ErrorEvent) => any;
-    onfocus: (this: this, ev: FocusEvent) => any;
-    onhashchange: (this: this, ev: HashChangeEvent) => any;
-    onload: (this: this, ev: Event) => any;
-    onmessage: (this: this, ev: MessageEvent) => any;
-    onoffline: (this: this, ev: Event) => any;
-    ononline: (this: this, ev: Event) => any;
-    onorientationchange: (this: this, ev: Event) => any;
-    onpagehide: (this: this, ev: PageTransitionEvent) => any;
-    onpageshow: (this: this, ev: PageTransitionEvent) => any;
-    onpopstate: (this: this, ev: PopStateEvent) => any;
-    onresize: (this: this, ev: UIEvent) => any;
-    onstorage: (this: this, ev: StorageEvent) => any;
-    onunload: (this: this, ev: Event) => any;
-    text: any;
-    vLink: any;
-    addEventListener(type: "MSContentZoom", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureChange", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureDoubleTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureEnd", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureHold", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGotPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSInertiaStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSLostPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSManipulationStateChanged", listener: (this: this, ev: MSManipulationEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerCancel", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerDown", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerEnter", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerLeave", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerMove", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOut", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOver", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerUp", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "abort", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "activate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "afterprint", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "ariarequest", listener: (this: this, ev: AriaRequestEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforecopy", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforecut", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforedeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforepaste", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforeprint", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforeunload", listener: (this: this, ev: BeforeUnloadEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "blur", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "blur", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplay", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplaythrough", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "change", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "click", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "command", listener: (this: this, ev: CommandEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "contextmenu", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "copy", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "cuechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "cut", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dblclick", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "deactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drag", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragend", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragenter", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragleave", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragover", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragstart", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drop", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "durationchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "emptied", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "ended", listener: (this: this, ev: MediaStreamErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "focus", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "focus", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "gotpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "hashchange", listener: (this: this, ev: HashChangeEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "input", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "invalid", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "keydown", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keypress", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keyup", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadeddata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadedmetadata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "lostpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "message", listener: (this: this, ev: MessageEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousedown", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseenter", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseleave", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousemove", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseout", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseover", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseup", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousewheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "offline", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "online", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "orientationchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "pagehide", listener: (this: this, ev: PageTransitionEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pageshow", listener: (this: this, ev: PageTransitionEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "paste", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pause", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "play", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "playing", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointercancel", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerdown", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerenter", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerleave", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointermove", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerout", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerover", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerup", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "popstate", listener: (this: this, ev: PopStateEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "progress", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ratechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "reset", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "resize", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "scroll", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeked", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeking", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "select", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "selectstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "stalled", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "storage", listener: (this: this, ev: StorageEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "submit", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "suspend", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "timeupdate", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchcancel", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchend", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchmove", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchstart", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "unload", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "volumechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "waiting", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenerror", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "wheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLBodyElement: {
-    prototype: HTMLBodyElement;
-    new(): HTMLBodyElement;
-}
-
-interface HTMLButtonElement extends HTMLElement {
-    /**
-      * Provides a way to direct a user to a specific field when a document loads. This can provide both direction and convenience for a user, reducing the need to click or tab to a field when a page opens. This attribute is true when present on an element, and false when missing.
-      */
-    autofocus: boolean;
-    disabled: boolean;
-    /**
-      * Retrieves a reference to the form that the object is embedded in.
-      */
-    readonly form: HTMLFormElement;
-    /**
-      * Overrides the action attribute (where the data on a form is sent) on the parent form element.
-      */
-    formAction: string;
-    /**
-      * Used to override the encoding (formEnctype attribute) specified on the form element.
-      */
-    formEnctype: string;
-    /**
-      * Overrides the submit method attribute previously specified on a form element.
-      */
-    formMethod: string;
-    /**
-      * Overrides any validation or required attributes on a form or form elements to allow it to be submitted without validation. This can be used to create a "save draft"-type submit option.
-      */
-    formNoValidate: string;
-    /**
-      * Overrides the target attribute on a form element.
-      */
-    formTarget: string;
-    /** 
-      * Sets or retrieves the name of the object.
-      */
-    name: string;
-    status: any;
-    /**
-      * Gets the classification and default behavior of the button.
-      */
-    type: string;
-    /**
-      * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
-      */
-    readonly validationMessage: string;
-    /**
-      * Returns a  ValidityState object that represents the validity states of an element.
-      */
-    readonly validity: ValidityState;
-    /** 
-      * Sets or retrieves the default or selected value of the control.
-      */
-    value: string;
-    /**
-      * Returns whether an element will successfully validate based on forms validation rules and constraints.
-      */
-    readonly willValidate: boolean;
-    /**
-      * Returns whether a form will validate when it is submitted, without having to submit it.
-      */
-    checkValidity(): boolean;
-    /**
-      * Sets a custom error message that is displayed when a form is submitted.
-      * @param error Sets a custom error message that is displayed when a form is submitted.
-      */
-    setCustomValidity(error: string): void;
-}
-
-declare var HTMLButtonElement: {
-    prototype: HTMLButtonElement;
-    new(): HTMLButtonElement;
-}
-
-interface HTMLCanvasElement extends HTMLElement {
-    /**
-      * Gets or sets the height of a canvas element on a document.
-      */
-    height: number;
-    /**
-      * Gets or sets the width of a canvas element on a document.
-      */
-    width: number;
-    /**
-      * Returns an object that provides methods and properties for drawing and manipulating images and graphics on a canvas element in a document. A context object includes information about colors, line widths, fonts, and other graphic parameters that can be drawn on a canvas.
-      * @param contextId The identifier (ID) of the type of canvas to create. Internet Explorer 9 and Internet Explorer 10 support only a 2-D context using canvas.getContext("2d"); IE11 Preview also supports 3-D or WebGL context using canvas.getContext("experimental-webgl");
-      */
-    getContext(contextId: "2d", contextAttributes?: Canvas2DContextAttributes): CanvasRenderingContext2D | null;
-    getContext(contextId: "webgl" | "experimental-webgl", contextAttributes?: WebGLContextAttributes): WebGLRenderingContext | null;
-    getContext(contextId: string, contextAttributes?: {}): CanvasRenderingContext2D | WebGLRenderingContext | null;
-    /**
-      * Returns a blob object encoded as a Portable Network Graphics (PNG) format from a canvas image or drawing.
-      */
-    msToBlob(): Blob;
-    /**
-      * Returns the content of the current canvas as an image that you can use as a source for another canvas or an HTML element.
-      * @param type The standard MIME type for the image format to return. If you do not specify this parameter, the default value is a PNG format image.
-      */
-    toDataURL(type?: string, ...args: any[]): string;
-    toBlob(callback: (result: Blob | null) => void, type?: string, ...arguments: any[]): void;
-}
-
-declare var HTMLCanvasElement: {
-    prototype: HTMLCanvasElement;
-    new(): HTMLCanvasElement;
-}
-
-interface HTMLCollection {
-    /**
-      * Sets or retrieves the number of objects in a collection.
-      */
-    readonly length: number;
-    /**
-      * Retrieves an object from various collections.
-      */
-    item(index: number): Element;
-    /**
-      * Retrieves a select object or an object from an options collection.
-      */
-    namedItem(name: string): Element;
-    [index: number]: Element;
-}
-
-declare var HTMLCollection: {
-    prototype: HTMLCollection;
-    new(): HTMLCollection;
-}
-
-interface HTMLDListElement extends HTMLElement {
-    compact: boolean;
-}
-
-declare var HTMLDListElement: {
-    prototype: HTMLDListElement;
-    new(): HTMLDListElement;
-}
-
-interface HTMLDataListElement extends HTMLElement {
-    options: HTMLCollectionOf<HTMLOptionElement>;
-}
-
-declare var HTMLDataListElement: {
-    prototype: HTMLDataListElement;
-    new(): HTMLDataListElement;
-}
-
-interface HTMLDirectoryElement extends HTMLElement {
-    compact: boolean;
-}
-
-declare var HTMLDirectoryElement: {
-    prototype: HTMLDirectoryElement;
-    new(): HTMLDirectoryElement;
-}
-
-interface HTMLDivElement extends HTMLElement {
-    /**
-      * Sets or retrieves how the object is aligned with adjacent text. 
-      */
-    align: string;
-    /**
-      * Sets or retrieves whether the browser automatically performs wordwrap.
-      */
-    noWrap: boolean;
-}
-
-declare var HTMLDivElement: {
-    prototype: HTMLDivElement;
-    new(): HTMLDivElement;
-}
-
-interface HTMLDocument extends Document {
-}
-
-declare var HTMLDocument: {
-    prototype: HTMLDocument;
-    new(): HTMLDocument;
-}
-
-interface HTMLElement extends Element {
-    accessKey: string;
-    readonly children: HTMLCollection;
-    contentEditable: string;
-    readonly dataset: DOMStringMap;
-    dir: string;
-    draggable: boolean;
-    hidden: boolean;
-    hideFocus: boolean;
-    innerHTML: string;
-    innerText: string;
-    readonly isContentEditable: boolean;
-    lang: string;
-    readonly offsetHeight: number;
-    readonly offsetLeft: number;
-    readonly offsetParent: Element;
-    readonly offsetTop: number;
-    readonly offsetWidth: number;
-    onabort: (this: this, ev: UIEvent) => any;
-    onactivate: (this: this, ev: UIEvent) => any;
-    onbeforeactivate: (this: this, ev: UIEvent) => any;
-    onbeforecopy: (this: this, ev: ClipboardEvent) => any;
-    onbeforecut: (this: this, ev: ClipboardEvent) => any;
-    onbeforedeactivate: (this: this, ev: UIEvent) => any;
-    onbeforepaste: (this: this, ev: ClipboardEvent) => any;
-    onblur: (this: this, ev: FocusEvent) => any;
-    oncanplay: (this: this, ev: Event) => any;
-    oncanplaythrough: (this: this, ev: Event) => any;
-    onchange: (this: this, ev: Event) => any;
-    onclick: (this: this, ev: MouseEvent) => any;
-    oncontextmenu: (this: this, ev: PointerEvent) => any;
-    oncopy: (this: this, ev: ClipboardEvent) => any;
-    oncuechange: (this: this, ev: Event) => any;
-    oncut: (this: this, ev: ClipboardEvent) => any;
-    ondblclick: (this: this, ev: MouseEvent) => any;
-    ondeactivate: (this: this, ev: UIEvent) => any;
-    ondrag: (this: this, ev: DragEvent) => any;
-    ondragend: (this: this, ev: DragEvent) => any;
-    ondragenter: (this: this, ev: DragEvent) => any;
-    ondragleave: (this: this, ev: DragEvent) => any;
-    ondragover: (this: this, ev: DragEvent) => any;
-    ondragstart: (this: this, ev: DragEvent) => any;
-    ondrop: (this: this, ev: DragEvent) => any;
-    ondurationchange: (this: this, ev: Event) => any;
-    onemptied: (this: this, ev: Event) => any;
-    onended: (this: this, ev: MediaStreamErrorEvent) => any;
-    onerror: (this: this, ev: ErrorEvent) => any;
-    onfocus: (this: this, ev: FocusEvent) => any;
-    oninput: (this: this, ev: Event) => any;
-    oninvalid: (this: this, ev: Event) => any;
-    onkeydown: (this: this, ev: KeyboardEvent) => any;
-    onkeypress: (this: this, ev: KeyboardEvent) => any;
-    onkeyup: (this: this, ev: KeyboardEvent) => any;
-    onload: (this: this, ev: Event) => any;
-    onloadeddata: (this: this, ev: Event) => any;
-    onloadedmetadata: (this: this, ev: Event) => any;
-    onloadstart: (this: this, ev: Event) => any;
-    onmousedown: (this: this, ev: MouseEvent) => any;
-    onmouseenter: (this: this, ev: MouseEvent) => any;
-    onmouseleave: (this: this, ev: MouseEvent) => any;
-    onmousemove: (this: this, ev: MouseEvent) => any;
-    onmouseout: (this: this, ev: MouseEvent) => any;
-    onmouseover: (this: this, ev: MouseEvent) => any;
-    onmouseup: (this: this, ev: MouseEvent) => any;
-    onmousewheel: (this: this, ev: WheelEvent) => any;
-    onmscontentzoom: (this: this, ev: UIEvent) => any;
-    onmsmanipulationstatechanged: (this: this, ev: MSManipulationEvent) => any;
-    onpaste: (this: this, ev: ClipboardEvent) => any;
-    onpause: (this: this, ev: Event) => any;
-    onplay: (this: this, ev: Event) => any;
-    onplaying: (this: this, ev: Event) => any;
-    onprogress: (this: this, ev: ProgressEvent) => any;
-    onratechange: (this: this, ev: Event) => any;
-    onreset: (this: this, ev: Event) => any;
-    onscroll: (this: this, ev: UIEvent) => any;
-    onseeked: (this: this, ev: Event) => any;
-    onseeking: (this: this, ev: Event) => any;
-    onselect: (this: this, ev: UIEvent) => any;
-    onselectstart: (this: this, ev: Event) => any;
-    onstalled: (this: this, ev: Event) => any;
-    onsubmit: (this: this, ev: Event) => any;
-    onsuspend: (this: this, ev: Event) => any;
-    ontimeupdate: (this: this, ev: Event) => any;
-    onvolumechange: (this: this, ev: Event) => any;
-    onwaiting: (this: this, ev: Event) => any;
-    outerHTML: string;
-    outerText: string;
-    spellcheck: boolean;
-    readonly style: CSSStyleDeclaration;
-    tabIndex: number;
-    title: string;
-    blur(): void;
-    click(): void;
-    dragDrop(): boolean;
-    focus(): void;
-    msGetInputContext(): MSInputMethodContext;
-    setActive(): void;
-    addEventListener(type: "MSContentZoom", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureChange", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureDoubleTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureEnd", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureHold", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGotPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSInertiaStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSLostPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSManipulationStateChanged", listener: (this: this, ev: MSManipulationEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerCancel", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerDown", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerEnter", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerLeave", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerMove", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOut", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOver", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerUp", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "abort", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "activate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ariarequest", listener: (this: this, ev: AriaRequestEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforecopy", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforecut", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforedeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforepaste", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "blur", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplay", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplaythrough", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "change", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "click", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "command", listener: (this: this, ev: CommandEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "contextmenu", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "copy", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "cuechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "cut", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dblclick", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "deactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drag", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragend", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragenter", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragleave", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragover", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragstart", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drop", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "durationchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "emptied", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "ended", listener: (this: this, ev: MediaStreamErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "focus", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "gotpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "input", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "invalid", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "keydown", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keypress", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keyup", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadeddata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadedmetadata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "lostpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousedown", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseenter", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseleave", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousemove", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseout", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseover", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseup", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousewheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "paste", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pause", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "play", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "playing", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointercancel", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerdown", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerenter", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerleave", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointermove", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerout", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerover", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerup", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "progress", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ratechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "reset", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "scroll", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeked", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeking", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "select", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "selectstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "stalled", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "submit", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "suspend", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "timeupdate", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchcancel", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchend", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchmove", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchstart", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "volumechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "waiting", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenerror", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "wheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLElement: {
-    prototype: HTMLElement;
-    new(): HTMLElement;
-}
-
-interface HTMLEmbedElement extends HTMLElement, GetSVGDocument {
-    /**
-      * Sets or retrieves the height of the object.
-      */
-    height: string;
-    hidden: any;
-    /**
-      * Gets or sets whether the DLNA PlayTo device is available.
-      */
-    msPlayToDisabled: boolean;
-    /**
-      * Gets or sets the path to the preferred media source. This enables the Play To target device to stream the media content, which can be DRM protected, from a different location, such as a cloud media server.
-      */
-    msPlayToPreferredSourceUri: string;
-    /**
-      * Gets or sets the primary DLNA PlayTo device.
-      */
-    msPlayToPrimary: boolean;
-    /**
-      * Gets the source associated with the media element for use by the PlayToManager.
-      */
-    readonly msPlayToSource: any;
-    /**
-      * Sets or retrieves the name of the object.
-      */
-    name: string;
-    /**
-      * Retrieves the palette used for the embedded document.
-      */
-    readonly palette: string;
-    /**
-      * Retrieves the URL of the plug-in used to view an embedded document.
-      */
-    readonly pluginspage: string;
-    readonly readyState: string;
-    /**
-      * Sets or retrieves a URL to be loaded by the object.
-      */
-    src: string;
-    /**
-      * Sets or retrieves the height and width units of the embed object.
-      */
-    units: string;
-    /**
-      * Sets or retrieves the width of the object.
-      */
-    width: string;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLEmbedElement: {
-    prototype: HTMLEmbedElement;
-    new(): HTMLEmbedElement;
-}
-
-interface HTMLFieldSetElement extends HTMLElement {
-    /**
-      * Sets or retrieves how the object is aligned with adjacent text.
-      */
-    align: string;
-    disabled: boolean;
-    /**
-      * Retrieves a reference to the form that the object is embedded in.
-      */
-    readonly form: HTMLFormElement;
-    /**
-      * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
-      */
-    readonly validationMessage: string;
-    /**
-      * Returns a  ValidityState object that represents the validity states of an element.
-      */
-    readonly validity: ValidityState;
-    /**
-      * Returns whether an element will successfully validate based on forms validation rules and constraints.
-      */
-    readonly willValidate: boolean;
-    /**
-      * Returns whether a form will validate when it is submitted, without having to submit it.
-      */
-    checkValidity(): boolean;
-    /**
-      * Sets a custom error message that is displayed when a form is submitted.
-      * @param error Sets a custom error message that is displayed when a form is submitted.
-      */
-    setCustomValidity(error: string): void;
-}
-
-declare var HTMLFieldSetElement: {
-    prototype: HTMLFieldSetElement;
-    new(): HTMLFieldSetElement;
-}
-
-interface HTMLFontElement extends HTMLElement, DOML2DeprecatedColorProperty, DOML2DeprecatedSizeProperty {
-    /**
-      * Sets or retrieves the current typeface family.
-      */
-    face: string;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLFontElement: {
-    prototype: HTMLFontElement;
-    new(): HTMLFontElement;
-}
-
-interface HTMLFormElement extends HTMLElement {
-    /**
-      * Sets or retrieves a list of character encodings for input data that must be accepted by the server processing the form.
-      */
-    acceptCharset: string;
-    /**
-      * Sets or retrieves the URL to which the form content is sent for processing.
-      */
-    action: string;
-    /**
-      * Specifies whether autocomplete is applied to an editable text field.
-      */
-    autocomplete: string;
-    /**
-      * Retrieves a collection, in source order, of all controls in a given form.
-      */
-    readonly elements: HTMLCollection;
-    /**
-      * Sets or retrieves the MIME encoding for the form.
-      */
-    encoding: string;
-    /**
-      * Sets or retrieves the encoding type for the form.
-      */
-    enctype: string;
-    /**
-      * Sets or retrieves the number of objects in a collection.
-      */
-    readonly length: number;
-    /**
-      * Sets or retrieves how to send the form data to the server.
-      */
-    method: string;
-    /**
-      * Sets or retrieves the name of the object.
-      */
-    name: string;
-    /**
-      * Designates a form that is not validated when submitted.
-      */
-    noValidate: boolean;
-    /**
-      * Sets or retrieves the window or frame at which to target content.
-      */
-    target: string;
-    /**
-      * Returns whether a form will validate when it is submitted, without having to submit it.
-      */
-    checkValidity(): boolean;
-    /**
-      * Retrieves a form object or an object from an elements collection.
-      * @param name Variant of type Number or String that specifies the object or collection to retrieve. If this parameter is a Number, it is the zero-based index of the object. If this parameter is a string, all objects with matching name or id properties are retrieved, and a collection is returned if more than one match is made.
-      * @param index Variant of type Number that specifies the zero-based index of the object to retrieve when a collection is returned.
-      */
-    item(name?: any, index?: any): any;
-    /**
-      * Retrieves a form object or an object from an elements collection.
-      */
-    namedItem(name: string): any;
-    /**
-      * Fires when the user resets a form.
-      */
-    reset(): void;
-    /**
-      * Fires when a FORM is about to be submitted.
-      */
-    submit(): void;
-    [name: string]: any;
-}
-
-declare var HTMLFormElement: {
-    prototype: HTMLFormElement;
-    new(): HTMLFormElement;
-}
-
-interface HTMLFrameElement extends HTMLElement, GetSVGDocument {
-    /**
-      * Specifies the properties of a border drawn around an object.
-      */
-    border: string;
-    /**
-      * Sets or retrieves the border color of the object.
-      */
-    borderColor: any;
-    /**
-      * Retrieves the document object of the page or frame.
-      */
-    readonly contentDocument: Document;
-    /**
-      * Retrieves the object of the specified.
-      */
-    readonly contentWindow: Window;
-    /**
-      * Sets or retrieves whether to display a border for the frame.
-      */
-    frameBorder: string;
-    /**
-      * Sets or retrieves the amount of additional space between the frames.
-      */
-    frameSpacing: any;
-    /**
-      * Sets or retrieves the height of the object.
-      */
-    height: string | number;
-    /**
-      * Sets or retrieves a URI to a long description of the object.
-      */
-    longDesc: string;
-    /**
-      * Sets or retrieves the top and bottom margin heights before displaying the text in a frame.
-      */
-    marginHeight: string;
-    /**
-      * Sets or retrieves the left and right margin widths before displaying the text in a frame.
-      */
-    marginWidth: string;
-    /**
-      * Sets or retrieves the frame name.
-      */
-    name: string;
-    /**
-      * Sets or retrieves whether the user can resize the frame.
-      */
-    noResize: boolean;
-    /**
-      * Raised when the object has been completely received from the server.
-      */
-    onload: (this: this, ev: Event) => any;
-    /**
-      * Sets or retrieves whether the frame can be scrolled.
-      */
-    scrolling: string;
-    /**
-      * Sets or retrieves a URL to be loaded by the object.
-      */
-    src: string;
-    /**
-      * Sets or retrieves the width of the object.
-      */
-    width: string | number;
-    addEventListener(type: "MSContentZoom", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureChange", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureDoubleTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureEnd", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureHold", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGotPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSInertiaStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSLostPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSManipulationStateChanged", listener: (this: this, ev: MSManipulationEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerCancel", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerDown", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerEnter", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerLeave", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerMove", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOut", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOver", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerUp", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "abort", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "activate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ariarequest", listener: (this: this, ev: AriaRequestEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforecopy", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforecut", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforedeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforepaste", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "blur", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplay", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplaythrough", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "change", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "click", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "command", listener: (this: this, ev: CommandEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "contextmenu", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "copy", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "cuechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "cut", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dblclick", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "deactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drag", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragend", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragenter", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragleave", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragover", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragstart", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drop", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "durationchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "emptied", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "ended", listener: (this: this, ev: MediaStreamErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "focus", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "gotpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "input", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "invalid", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "keydown", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keypress", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keyup", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadeddata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadedmetadata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "lostpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousedown", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseenter", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseleave", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousemove", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseout", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseover", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseup", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousewheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "paste", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pause", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "play", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "playing", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointercancel", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerdown", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerenter", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerleave", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointermove", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerout", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerover", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerup", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "progress", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ratechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "reset", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "scroll", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeked", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeking", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "select", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "selectstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "stalled", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "submit", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "suspend", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "timeupdate", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchcancel", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchend", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchmove", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchstart", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "volumechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "waiting", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenerror", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "wheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLFrameElement: {
-    prototype: HTMLFrameElement;
-    new(): HTMLFrameElement;
-}
-
-interface HTMLFrameSetElement extends HTMLElement {
-    border: string;
-    /**
-      * Sets or retrieves the border color of the object.
-      */
-    borderColor: any;
-    /**
-      * Sets or retrieves the frame widths of the object.
-      */
-    cols: string;
-    /**
-      * Sets or retrieves whether to display a border for the frame.
-      */
-    frameBorder: string;
-    /**
-      * Sets or retrieves the amount of additional space between the frames.
-      */
-    frameSpacing: any;
-    name: string;
-    onafterprint: (this: this, ev: Event) => any;
-    onbeforeprint: (this: this, ev: Event) => any;
-    onbeforeunload: (this: this, ev: BeforeUnloadEvent) => any;
-    /**
-      * Fires when the object loses the input focus.
-      */
-    onblur: (this: this, ev: FocusEvent) => any;
-    onerror: (this: this, ev: ErrorEvent) => any;
-    /**
-      * Fires when the object receives focus.
-      */
-    onfocus: (this: this, ev: FocusEvent) => any;
-    onhashchange: (this: this, ev: HashChangeEvent) => any;
-    onload: (this: this, ev: Event) => any;
-    onmessage: (this: this, ev: MessageEvent) => any;
-    onoffline: (this: this, ev: Event) => any;
-    ononline: (this: this, ev: Event) => any;
-    onorientationchange: (this: this, ev: Event) => any;
-    onpagehide: (this: this, ev: PageTransitionEvent) => any;
-    onpageshow: (this: this, ev: PageTransitionEvent) => any;
-    onresize: (this: this, ev: UIEvent) => any;
-    onstorage: (this: this, ev: StorageEvent) => any;
-    onunload: (this: this, ev: Event) => any;
-    /**
-      * Sets or retrieves the frame heights of the object.
-      */
-    rows: string;
-    addEventListener(type: "MSContentZoom", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureChange", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureDoubleTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureEnd", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureHold", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGotPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSInertiaStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSLostPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSManipulationStateChanged", listener: (this: this, ev: MSManipulationEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerCancel", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerDown", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerEnter", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerLeave", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerMove", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOut", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOver", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerUp", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "abort", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "activate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ariarequest", listener: (this: this, ev: AriaRequestEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforecopy", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforecut", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforedeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforepaste", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforeprint", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforeunload", listener: (this: this, ev: BeforeUnloadEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "blur", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "blur", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplay", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplaythrough", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "change", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "click", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "command", listener: (this: this, ev: CommandEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "contextmenu", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "copy", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "cuechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "cut", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dblclick", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "deactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drag", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragend", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragenter", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragleave", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragover", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragstart", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drop", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "durationchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "emptied", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "ended", listener: (this: this, ev: MediaStreamErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "focus", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "focus", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "gotpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "hashchange", listener: (this: this, ev: HashChangeEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "input", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "invalid", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "keydown", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keypress", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keyup", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadeddata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadedmetadata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "lostpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "message", listener: (this: this, ev: MessageEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousedown", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseenter", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseleave", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousemove", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseout", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseover", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseup", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousewheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "offline", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "online", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "orientationchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "pagehide", listener: (this: this, ev: PageTransitionEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pageshow", listener: (this: this, ev: PageTransitionEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "paste", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pause", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "play", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "playing", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointercancel", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerdown", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerenter", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerleave", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointermove", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerout", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerover", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerup", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "progress", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ratechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "reset", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "resize", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "scroll", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeked", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeking", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "select", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "selectstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "stalled", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "storage", listener: (this: this, ev: StorageEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "submit", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "suspend", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "timeupdate", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchcancel", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchend", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchmove", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchstart", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "unload", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "volumechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "waiting", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenerror", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "wheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLFrameSetElement: {
-    prototype: HTMLFrameSetElement;
-    new(): HTMLFrameSetElement;
-}
-
-interface HTMLHRElement extends HTMLElement, DOML2DeprecatedColorProperty, DOML2DeprecatedSizeProperty {
-    /**
-      * Sets or retrieves how the object is aligned with adjacent text.
-      */
-    align: string;
-    /**
-      * Sets or retrieves whether the horizontal rule is drawn with 3-D shading.
-      */
-    noShade: boolean;
-    /**
-      * Sets or retrieves the width of the object.
-      */
-    width: number;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLHRElement: {
-    prototype: HTMLHRElement;
-    new(): HTMLHRElement;
-}
-
-interface HTMLHeadElement extends HTMLElement {
-    profile: string;
-}
-
-declare var HTMLHeadElement: {
-    prototype: HTMLHeadElement;
-    new(): HTMLHeadElement;
-}
-
-interface HTMLHeadingElement extends HTMLElement {
-    /**
-      * Sets or retrieves a value that indicates the table alignment.
-      */
-    align: string;
-}
-
-declare var HTMLHeadingElement: {
-    prototype: HTMLHeadingElement;
-    new(): HTMLHeadingElement;
-}
-
-interface HTMLHtmlElement extends HTMLElement {
-    /**
-      * Sets or retrieves the DTD version that governs the current document.
-      */
-    version: string;
-}
-
-declare var HTMLHtmlElement: {
-    prototype: HTMLHtmlElement;
-    new(): HTMLHtmlElement;
-}
-
-interface HTMLIFrameElement extends HTMLElement, GetSVGDocument {
-    /**
-      * Sets or retrieves how the object is aligned with adjacent text.
-      */
-    align: string;
-    allowFullscreen: boolean;
-    /**
-      * Specifies the properties of a border drawn around an object.
-      */
-    border: string;
-    /**
-      * Retrieves the document object of the page or frame.
-      */
-    readonly contentDocument: Document;
-    /**
-      * Retrieves the object of the specified.
-      */
-    readonly contentWindow: Window;
-    /**
-      * Sets or retrieves whether to display a border for the frame.
-      */
-    frameBorder: string;
-    /**
-      * Sets or retrieves the amount of additional space between the frames.
-      */
-    frameSpacing: any;
-    /**
-      * Sets or retrieves the height of the object.
-      */
-    height: string;
-    /**
-      * Sets or retrieves the horizontal margin for the object.
-      */
-    hspace: number;
-    /**
-      * Sets or retrieves a URI to a long description of the object.
-      */
-    longDesc: string;
-    /**
-      * Sets or retrieves the top and bottom margin heights before displaying the text in a frame.
-      */
-    marginHeight: string;
-    /**
-      * Sets or retrieves the left and right margin widths before displaying the text in a frame.
-      */
-    marginWidth: string;
-    /**
-      * Sets or retrieves the frame name.
-      */
-    name: string;
-    /**
-      * Sets or retrieves whether the user can resize the frame.
-      */
-    noResize: boolean;
-    /**
-      * Raised when the object has been completely received from the server.
-      */
-    onload: (this: this, ev: Event) => any;
-    readonly sandbox: DOMSettableTokenList;
-    /**
-      * Sets or retrieves whether the frame can be scrolled.
-      */
-    scrolling: string;
-    /**
-      * Sets or retrieves a URL to be loaded by the object.
-      */
-    src: string;
-    /**
-      * Sets or retrieves the vertical margin for the object.
-      */
-    vspace: number;
-    /**
-      * Sets or retrieves the width of the object.
-      */
-    width: string;
-    addEventListener(type: "MSContentZoom", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureChange", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureDoubleTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureEnd", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureHold", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGotPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSInertiaStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSLostPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSManipulationStateChanged", listener: (this: this, ev: MSManipulationEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerCancel", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerDown", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerEnter", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerLeave", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerMove", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOut", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOver", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerUp", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "abort", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "activate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ariarequest", listener: (this: this, ev: AriaRequestEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforecopy", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforecut", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforedeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforepaste", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "blur", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplay", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplaythrough", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "change", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "click", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "command", listener: (this: this, ev: CommandEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "contextmenu", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "copy", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "cuechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "cut", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dblclick", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "deactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drag", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragend", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragenter", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragleave", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragover", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragstart", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drop", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "durationchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "emptied", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "ended", listener: (this: this, ev: MediaStreamErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "focus", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "gotpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "input", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "invalid", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "keydown", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keypress", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keyup", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadeddata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadedmetadata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "lostpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousedown", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseenter", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseleave", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousemove", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseout", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseover", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseup", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousewheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "paste", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pause", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "play", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "playing", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointercancel", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerdown", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerenter", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerleave", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointermove", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerout", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerover", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerup", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "progress", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ratechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "reset", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "scroll", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeked", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeking", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "select", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "selectstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "stalled", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "submit", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "suspend", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "timeupdate", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchcancel", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchend", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchmove", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchstart", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "volumechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "waiting", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenerror", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "wheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLIFrameElement: {
-    prototype: HTMLIFrameElement;
-    new(): HTMLIFrameElement;
-}
-
-interface HTMLImageElement extends HTMLElement {
-    /**
-      * Sets or retrieves how the object is aligned with adjacent text.
-      */
-    align: string;
-    /**
-      * Sets or retrieves a text alternative to the graphic.
-      */
-    alt: string;
-    /**
-      * Specifies the properties of a border drawn around an object.
-      */
-    border: string;
-    /**
-      * Retrieves whether the object is fully loaded.
-      */
-    readonly complete: boolean;
-    crossOrigin: string;
-    readonly currentSrc: string;
-    /**
-      * Sets or retrieves the height of the object.
-      */
-    height: number;
-    /**
-      * Sets or retrieves the width of the border to draw around the object.
-      */
-    hspace: number;
-    /**
-      * Sets or retrieves whether the image is a server-side image map.
-      */
-    isMap: boolean;
-    /**
-      * Sets or retrieves a Uniform Resource Identifier (URI) to a long description of the object.
-      */
-    longDesc: string;
-    lowsrc: string;
-    /**
-      * Gets or sets whether the DLNA PlayTo device is available.
-      */
-    msPlayToDisabled: boolean;
-    msPlayToPreferredSourceUri: string;
-    /**
-      * Gets or sets the primary DLNA PlayTo device.
-      */
-    msPlayToPrimary: boolean;
-    /**
-      * Gets the source associated with the media element for use by the PlayToManager.
-      */
-    readonly msPlayToSource: any;
-    /**
-      * Sets or retrieves the name of the object.
-      */
-    name: string;
-    /**
-      * The original height of the image resource before sizing.
-      */
-    readonly naturalHeight: number;
-    /**
-      * The original width of the image resource before sizing.
-      */
-    readonly naturalWidth: number;
-    sizes: string;
-    /**
-      * The address or URL of the a media resource that is to be considered.
-      */
-    src: string;
-    srcset: string;
-    /**
-      * Sets or retrieves the URL, often with a bookmark extension (#name), to use as a client-side image map.
-      */
-    useMap: string;
-    /**
-      * Sets or retrieves the vertical margin for the object.
-      */
-    vspace: number;
-    /**
-      * Sets or retrieves the width of the object.
-      */
-    width: number;
-    readonly x: number;
-    readonly y: number;
-    msGetAsCastingSource(): any;
-}
-
-declare var HTMLImageElement: {
-    prototype: HTMLImageElement;
-    new(): HTMLImageElement;
-    create(): HTMLImageElement;
-}
-
-interface HTMLInputElement extends HTMLElement {
-    /**
-      * Sets or retrieves a comma-separated list of content types.
-      */
-    accept: string;
-    /**
-      * Sets or retrieves how the object is aligned with adjacent text.
-      */
-    align: string;
-    /**
-      * Sets or retrieves a text alternative to the graphic.
-      */
-    alt: string;
-    /**
-      * Specifies whether autocomplete is applied to an editable text field.
-      */
-    autocomplete: string;
-    /**
-      * Provides a way to direct a user to a specific field when a document loads. This can provide both direction and convenience for a user, reducing the need to click or tab to a field when a page opens. This attribute is true when present on an element, and false when missing.
-      */
-    autofocus: boolean;
-    /**
-      * Sets or retrieves the width of the border to draw around the object.
-      */
-    border: string;
-    /**
-      * Sets or retrieves the state of the check box or radio button.
-      */
-    checked: boolean;
-    /**
-      * Retrieves whether the object is fully loaded.
-      */
-    readonly complete: boolean;
-    /**
-      * Sets or retrieves the state of the check box or radio button.
-      */
-    defaultChecked: boolean;
-    /**
-      * Sets or retrieves the initial contents of the object.
-      */
-    defaultValue: string;
-    disabled: boolean;
-    /**
-      * Returns a FileList object on a file type input object.
-      */
-    readonly files: FileList | null;
-    /**
-      * Retrieves a reference to the form that the object is embedded in. 
-      */
-    readonly form: HTMLFormElement;
-    /**
-      * Overrides the action attribute (where the data on a form is sent) on the parent form element.
-      */
-    formAction: string;
-    /**
-      * Used to override the encoding (formEnctype attribute) specified on the form element.
-      */
-    formEnctype: string;
-    /**
-      * Overrides the submit method attribute previously specified on a form element.
-      */
-    formMethod: string;
-    /**
-      * Overrides any validation or required attributes on a form or form elements to allow it to be submitted without validation. This can be used to create a "save draft"-type submit option.
-      */
-    formNoValidate: string;
-    /**
-      * Overrides the target attribute on a form element.
-      */
-    formTarget: string;
-    /**
-      * Sets or retrieves the height of the object.
-      */
-    height: string;
-    /**
-      * Sets or retrieves the width of the border to draw around the object.
-      */
-    hspace: number;
-    indeterminate: boolean;
-    /**
-      * Specifies the ID of a pre-defined datalist of options for an input element.
-      */
-    readonly list: HTMLElement;
-    /**
-      * Defines the maximum acceptable value for an input element with type="number".When used with the min and step attributes, lets you control the range and increment (such as only even numbers) that the user can enter into an input field.
-      */
-    max: string;
-    /**
-      * Sets or retrieves the maximum number of characters that the user can enter in a text control.
-      */
-    maxLength: number;
-    /**
-      * Defines the minimum acceptable value for an input element with type="number". When used with the max and step attributes, lets you control the range and increment (such as even numbers only) that the user can enter into an input field.
-      */
-    min: string;
-    /**
-      * Sets or retrieves the Boolean value indicating whether multiple items can be selected from a list.
-      */
-    multiple: boolean;
-    /**
-      * Sets or retrieves the name of the object.
-      */
-    name: string;
-    /**
-      * Gets or sets a string containing a regular expression that the user's input must match.
-      */
-    pattern: string;
-    /**
-      * Gets or sets a text string that is displayed in an input field as a hint or prompt to users as the format or type of information they need to enter.The text appears in an input field until the user puts focus on the field.
-      */
-    placeholder: string;
-    readOnly: boolean;
-    /**
-      * When present, marks an element that can't be submitted without a value.
-      */
-    required: boolean;
-    selectionDirection: string;
-    /**
-      * Gets or sets the end position or offset of a text selection.
-      */
-    selectionEnd: number;
-    /**
-      * Gets or sets the starting position or offset of a text selection.
-      */
-    selectionStart: number;
-    size: number;
-    /**
-      * The address or URL of the a media resource that is to be considered.
-      */
-    src: string;
-    status: boolean;
-    /**
-      * Defines an increment or jump between values that you want to allow the user to enter. When used with the max and min attributes, lets you control the range and increment (for example, allow only even numbers) that the user can enter into an input field.
-      */
-    step: string;
-    /**
-      * Returns the content type of the object.
-      */
-    type: string;
-    /**
-      * Sets or retrieves the URL, often with a bookmark extension (#name), to use as a client-side image map.
-      */
-    useMap: string;
-    /**
-      * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
-      */
-    readonly validationMessage: string;
-    /**
-      * Returns a  ValidityState object that represents the validity states of an element.
-      */
-    readonly validity: ValidityState;
-    /**
-      * Returns the value of the data at the cursor's current position.
-      */
-    value: string;
-    valueAsDate: Date;
-    /**
-      * Returns the input field value as a number.
-      */
-    valueAsNumber: number;
-    /**
-      * Sets or retrieves the vertical margin for the object.
-      */
-    vspace: number;
-    webkitdirectory: boolean;
-    /**
-      * Sets or retrieves the width of the object.
-      */
-    width: string;
-    /**
-      * Returns whether an element will successfully validate based on forms validation rules and constraints.
-      */
-    readonly willValidate: boolean;
-    minLength: number;
-    /**
-      * Returns whether a form will validate when it is submitted, without having to submit it.
-      */
-    checkValidity(): boolean;
-    /**
-      * Makes the selection equal to the current object.
-      */
-    select(): void;
-    /**
-      * Sets a custom error message that is displayed when a form is submitted.
-      * @param error Sets a custom error message that is displayed when a form is submitted.
-      */
-    setCustomValidity(error: string): void;
-    /**
-      * Sets the start and end positions of a selection in a text field.
-      * @param start The offset into the text field for the start of the selection.
-      * @param end The offset into the text field for the end of the selection.
-      */
-    setSelectionRange(start?: number, end?: number, direction?: string): void;
-    /**
-      * Decrements a range input control's value by the value given by the Step attribute. If the optional parameter is used, it will decrement the input control's step value multiplied by the parameter's value.
-      * @param n Value to decrement the value by.
-      */
-    stepDown(n?: number): void;
-    /**
-      * Increments a range input control's value by the value given by the Step attribute. If the optional parameter is used, will increment the input control's value by that value.
-      * @param n Value to increment the value by.
-      */
-    stepUp(n?: number): void;
-}
-
-declare var HTMLInputElement: {
-    prototype: HTMLInputElement;
-    new(): HTMLInputElement;
-}
-
-interface HTMLLIElement extends HTMLElement {
-    type: string;
-    /**
-      * Sets or retrieves the value of a list item.
-      */
-    value: number;
-}
-
-declare var HTMLLIElement: {
-    prototype: HTMLLIElement;
-    new(): HTMLLIElement;
-}
-
-interface HTMLLabelElement extends HTMLElement {
-    /**
-      * Retrieves a reference to the form that the object is embedded in.
-      */
-    readonly form: HTMLFormElement;
-    /**
-      * Sets or retrieves the object to which the given label object is assigned.
-      */
-    htmlFor: string;
-}
-
-declare var HTMLLabelElement: {
-    prototype: HTMLLabelElement;
-    new(): HTMLLabelElement;
-}
-
-interface HTMLLegendElement extends HTMLElement {
-    /**
-      * Retrieves a reference to the form that the object is embedded in.
-      */
-    align: string;
-    /**
-      * Retrieves a reference to the form that the object is embedded in.
-      */
-    readonly form: HTMLFormElement;
-}
-
-declare var HTMLLegendElement: {
-    prototype: HTMLLegendElement;
-    new(): HTMLLegendElement;
-}
-
-interface HTMLLinkElement extends HTMLElement, LinkStyle {
-    /**
-      * Sets or retrieves the character set used to encode the object.
-      */
-    charset: string;
-    disabled: boolean;
-    /**
-      * Sets or retrieves a destination URL or an anchor point.
-      */
-    href: string;
-    /**
-      * Sets or retrieves the language code of the object.
-      */
-    hreflang: string;
-    /**
-      * Sets or retrieves the media type.
-      */
-    media: string;
-    /**
-      * Sets or retrieves the relationship between the object and the destination of the link.
-      */
-    rel: string;
-    /**
-      * Sets or retrieves the relationship between the object and the destination of the link.
-      */
-    rev: string;
-    /**
-      * Sets or retrieves the window or frame at which to target content.
-      */
-    target: string;
-    /**
-      * Sets or retrieves the MIME type of the object.
-      */
-    type: string;
-    import?: Document;
-    integrity: string;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLLinkElement: {
-    prototype: HTMLLinkElement;
-    new(): HTMLLinkElement;
-}
-
-interface HTMLMapElement extends HTMLElement {
-    /**
-      * Retrieves a collection of the area objects defined for the given map object.
-      */
-    readonly areas: HTMLAreasCollection;
-    /**
-      * Sets or retrieves the name of the object.
-      */
-    name: string;
-}
-
-declare var HTMLMapElement: {
-    prototype: HTMLMapElement;
-    new(): HTMLMapElement;
-}
-
-interface HTMLMarqueeElement extends HTMLElement {
-    behavior: string;
-    bgColor: any;
-    direction: string;
-    height: string;
-    hspace: number;
-    loop: number;
-    onbounce: (this: this, ev: Event) => any;
-    onfinish: (this: this, ev: Event) => any;
-    onstart: (this: this, ev: Event) => any;
-    scrollAmount: number;
-    scrollDelay: number;
-    trueSpeed: boolean;
-    vspace: number;
-    width: string;
-    start(): void;
-    stop(): void;
-    addEventListener(type: "MSContentZoom", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureChange", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureDoubleTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureEnd", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureHold", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGotPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSInertiaStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSLostPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSManipulationStateChanged", listener: (this: this, ev: MSManipulationEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerCancel", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerDown", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerEnter", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerLeave", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerMove", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOut", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOver", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerUp", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "abort", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "activate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ariarequest", listener: (this: this, ev: AriaRequestEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforecopy", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforecut", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforedeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforepaste", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "blur", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "bounce", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplay", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplaythrough", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "change", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "click", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "command", listener: (this: this, ev: CommandEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "contextmenu", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "copy", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "cuechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "cut", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dblclick", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "deactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drag", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragend", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragenter", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragleave", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragover", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragstart", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drop", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "durationchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "emptied", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "ended", listener: (this: this, ev: MediaStreamErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "finish", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "focus", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "gotpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "input", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "invalid", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "keydown", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keypress", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keyup", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadeddata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadedmetadata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "lostpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousedown", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseenter", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseleave", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousemove", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseout", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseover", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseup", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousewheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "paste", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pause", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "play", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "playing", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointercancel", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerdown", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerenter", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerleave", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointermove", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerout", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerover", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerup", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "progress", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ratechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "reset", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "scroll", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeked", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeking", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "select", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "selectstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "stalled", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "start", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "submit", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "suspend", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "timeupdate", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchcancel", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchend", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchmove", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchstart", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "volumechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "waiting", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenerror", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "wheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLMarqueeElement: {
-    prototype: HTMLMarqueeElement;
-    new(): HTMLMarqueeElement;
-}
-
-interface HTMLMediaElement extends HTMLElement {
-    /**
-      * Returns an AudioTrackList object with the audio tracks for a given video element.
-      */
-    readonly audioTracks: AudioTrackList;
-    /**
-      * Gets or sets a value that indicates whether to start playing the media automatically.
-      */
-    autoplay: boolean;
-    /**
-      * Gets a collection of buffered time ranges.
-      */
-    readonly buffered: TimeRanges;
-    /**
-      * Gets or sets a flag that indicates whether the client provides a set of controls for the media (in case the developer does not include controls for the player).
-      */
-    controls: boolean;
-    crossOrigin: string;
-    /**
-      * Gets the address or URL of the current media resource that is selected by IHTMLMediaElement.
-      */
-    readonly currentSrc: string;
-    /**
-      * Gets or sets the current playback position, in seconds.
-      */
-    currentTime: number;
-    defaultMuted: boolean;
-    /**
-      * Gets or sets the default playback rate when the user is not using fast forward or reverse for a video or audio resource.
-      */
-    defaultPlaybackRate: number;
-    /**
-      * Returns the duration in seconds of the current media resource. A NaN value is returned if duration is not available, or Infinity if the media resource is streaming.
-      */
-    readonly duration: number;
-    /**
-      * Gets information about whether the playback has ended or not.
-      */
-    readonly ended: boolean;
-    /**
-      * Returns an object representing the current error state of the audio or video element.
-      */
-    readonly error: MediaError;
-    /**
-      * Gets or sets a flag to specify whether playback should restart after it completes.
-      */
-    loop: boolean;
-    readonly mediaKeys: MediaKeys | null;
-    /**
-      * Specifies the purpose of the audio or video media, such as background audio or alerts.
-      */
-    msAudioCategory: string;
-    /**
-      * Specifies the output device id that the audio will be sent to.
-      */
-    msAudioDeviceType: string;
-    readonly msGraphicsTrustStatus: MSGraphicsTrust;
-    /**
-      * Gets the MSMediaKeys object, which is used for decrypting media data, that is associated with this media element.
-      */
-    readonly msKeys: MSMediaKeys;
-    /**
-      * Gets or sets whether the DLNA PlayTo device is available.
-      */
-    msPlayToDisabled: boolean;
-    /**
-      * Gets or sets the path to the preferred media source. This enables the Play To target device to stream the media content, which can be DRM protected, from a different location, such as a cloud media server.
-      */
-    msPlayToPreferredSourceUri: string;
-    /**
-      * Gets or sets the primary DLNA PlayTo device.
-      */
-    msPlayToPrimary: boolean;
-    /**
-      * Gets the source associated with the media element for use by the PlayToManager.
-      */
-    readonly msPlayToSource: any;
-    /**
-      * Specifies whether or not to enable low-latency playback on the media element.
-      */
-    msRealTime: boolean;
-    /**
-      * Gets or sets a flag that indicates whether the audio (either audio or the audio track on video media) is muted.
-      */
-    muted: boolean;
-    /**
-      * Gets the current network activity for the element.
-      */
-    readonly networkState: number;
-    onencrypted: (this: this, ev: MediaEncryptedEvent) => any;
-    onmsneedkey: (this: this, ev: MSMediaKeyNeededEvent) => any;
-    /**
-      * Gets a flag that specifies whether playback is paused.
-      */
-    readonly paused: boolean;
-    /**
-      * Gets or sets the current rate of speed for the media resource to play. This speed is expressed as a multiple of the normal speed of the media resource.
-      */
-    playbackRate: number;
-    /**
-      * Gets TimeRanges for the current media resource that has been played.
-      */
-    readonly played: TimeRanges;
-    /**
-      * Gets or sets the current playback position, in seconds.
-      */
-    preload: string;
-    readyState: number;
-    /**
-      * Returns a TimeRanges object that represents the ranges of the current media resource that can be seeked.
-      */
-    readonly seekable: TimeRanges;
-    /**
-      * Gets a flag that indicates whether the the client is currently moving to a new playback position in the media resource.
-      */
-    readonly seeking: boolean;
-    /**
-      * The address or URL of the a media resource that is to be considered.
-      */
-    src: string;
-    srcObject: MediaStream | null;
-    readonly textTracks: TextTrackList;
-    readonly videoTracks: VideoTrackList;
-    /**
-      * Gets or sets the volume level for audio portions of the media element.
-      */
-    volume: number;
-    addTextTrack(kind: string, label?: string, language?: string): TextTrack;
-    /**
-      * Returns a string that specifies whether the client can play a given media resource type.
-      */
-    canPlayType(type: string): string;
-    /**
-      * Resets the audio or video object and loads a new media resource.
-      */
-    load(): void;
-    /**
-      * Clears all effects from the media pipeline.
-      */
-    msClearEffects(): void;
-    msGetAsCastingSource(): any;
-    /**
-      * Inserts the specified audio effect into media pipeline.
-      */
-    msInsertAudioEffect(activatableClassId: string, effectRequired: boolean, config?: any): void;
-    msSetMediaKeys(mediaKeys: MSMediaKeys): void;
-    /**
-      * Specifies the media protection manager for a given media pipeline.
-      */
-    msSetMediaProtectionManager(mediaProtectionManager?: any): void;
-    /**
-      * Pauses the current playback and sets paused to TRUE. This can be used to test whether the media is playing or paused. You can also use the pause or play events to tell whether the media is playing or not.
-      */
-    pause(): void;
-    /**
-      * Loads and starts playback of a media resource.
-      */
-    play(): void;
-    setMediaKeys(mediaKeys: MediaKeys | null): PromiseLike<void>;
-    readonly HAVE_CURRENT_DATA: number;
-    readonly HAVE_ENOUGH_DATA: number;
-    readonly HAVE_FUTURE_DATA: number;
-    readonly HAVE_METADATA: number;
-    readonly HAVE_NOTHING: number;
-    readonly NETWORK_EMPTY: number;
-    readonly NETWORK_IDLE: number;
-    readonly NETWORK_LOADING: number;
-    readonly NETWORK_NO_SOURCE: number;
-    addEventListener(type: "MSContentZoom", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureChange", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureDoubleTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureEnd", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureHold", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGotPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSInertiaStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSLostPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSManipulationStateChanged", listener: (this: this, ev: MSManipulationEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerCancel", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerDown", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerEnter", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerLeave", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerMove", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOut", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOver", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerUp", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "abort", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "activate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ariarequest", listener: (this: this, ev: AriaRequestEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforecopy", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforecut", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforedeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforepaste", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "blur", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplay", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplaythrough", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "change", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "click", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "command", listener: (this: this, ev: CommandEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "contextmenu", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "copy", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "cuechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "cut", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dblclick", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "deactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drag", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragend", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragenter", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragleave", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragover", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragstart", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drop", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "durationchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "emptied", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "encrypted", listener: (this: this, ev: MediaEncryptedEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ended", listener: (this: this, ev: MediaStreamErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "focus", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "gotpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "input", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "invalid", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "keydown", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keypress", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keyup", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadeddata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadedmetadata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "lostpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousedown", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseenter", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseleave", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousemove", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseout", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseover", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseup", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousewheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "msneedkey", listener: (this: this, ev: MSMediaKeyNeededEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "paste", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pause", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "play", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "playing", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointercancel", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerdown", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerenter", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerleave", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointermove", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerout", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerover", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerup", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "progress", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ratechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "reset", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "scroll", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeked", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeking", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "select", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "selectstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "stalled", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "submit", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "suspend", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "timeupdate", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchcancel", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchend", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchmove", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchstart", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "volumechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "waiting", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenerror", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "wheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLMediaElement: {
-    prototype: HTMLMediaElement;
-    new(): HTMLMediaElement;
-    readonly HAVE_CURRENT_DATA: number;
-    readonly HAVE_ENOUGH_DATA: number;
-    readonly HAVE_FUTURE_DATA: number;
-    readonly HAVE_METADATA: number;
-    readonly HAVE_NOTHING: number;
-    readonly NETWORK_EMPTY: number;
-    readonly NETWORK_IDLE: number;
-    readonly NETWORK_LOADING: number;
-    readonly NETWORK_NO_SOURCE: number;
-}
-
-interface HTMLMenuElement extends HTMLElement {
-    compact: boolean;
-    type: string;
-}
-
-declare var HTMLMenuElement: {
-    prototype: HTMLMenuElement;
-    new(): HTMLMenuElement;
-}
-
-interface HTMLMetaElement extends HTMLElement {
-    /**
-      * Sets or retrieves the character set used to encode the object.
-      */
-    charset: string;
-    /**
-      * Gets or sets meta-information to associate with httpEquiv or name.
-      */
-    content: string;
-    /**
-      * Gets or sets information used to bind the value of a content attribute of a meta element to an HTTP response header.
-      */
-    httpEquiv: string;
-    /**
-      * Sets or retrieves the value specified in the content attribute of the meta object.
-      */
-    name: string;
-    /**
-      * Sets or retrieves a scheme to be used in interpreting the value of a property specified for the object.
-      */
-    scheme: string;
-    /**
-      * Sets or retrieves the URL property that will be loaded after the specified time has elapsed. 
-      */
-    url: string;
-}
-
-declare var HTMLMetaElement: {
-    prototype: HTMLMetaElement;
-    new(): HTMLMetaElement;
-}
-
-interface HTMLMeterElement extends HTMLElement {
-    high: number;
-    low: number;
-    max: number;
-    min: number;
-    optimum: number;
-    value: number;
-}
-
-declare var HTMLMeterElement: {
-    prototype: HTMLMeterElement;
-    new(): HTMLMeterElement;
-}
-
-interface HTMLModElement extends HTMLElement {
-    /**
-      * Sets or retrieves reference information about the object.
-      */
-    cite: string;
-    /**
-      * Sets or retrieves the date and time of a modification to the object.
-      */
-    dateTime: string;
-}
-
-declare var HTMLModElement: {
-    prototype: HTMLModElement;
-    new(): HTMLModElement;
-}
-
-interface HTMLOListElement extends HTMLElement {
-    compact: boolean;
-    /**
-      * The starting number.
-      */
-    start: number;
-    type: string;
-}
-
-declare var HTMLOListElement: {
-    prototype: HTMLOListElement;
-    new(): HTMLOListElement;
-}
-
-interface HTMLObjectElement extends HTMLElement, GetSVGDocument {
-    /**
-      * Retrieves a string of the URL where the object tag can be found. This is often the href of the document that the object is in, or the value set by a base element.
-      */
-    readonly BaseHref: string;
-    align: string;
-    /**
-      * Sets or retrieves a text alternative to the graphic.
-      */
-    alt: string;
-    /**
-      * Gets or sets the optional alternative HTML script to execute if the object fails to load.
-      */
-    altHtml: string;
-    /**
-      * Sets or retrieves a character string that can be used to implement your own archive functionality for the object.
-      */
-    archive: string;
-    border: string;
-    /**
-      * Sets or retrieves the URL of the file containing the compiled Java class.
-      */
-    code: string;
-    /**
-      * Sets or retrieves the URL of the component.
-      */
-    codeBase: string;
-    /**
-      * Sets or retrieves the Internet media type for the code associated with the object.
-      */
-    codeType: string;
-    /**
-      * Retrieves the document object of the page or frame.
-      */
-    readonly contentDocument: Document;
-    /**
-      * Sets or retrieves the URL that references the data of the object.
-      */
-    data: string;
-    declare: boolean;
-    /**
-      * Retrieves a reference to the form that the object is embedded in.
-      */
-    readonly form: HTMLFormElement;
-    /**
-      * Sets or retrieves the height of the object.
-      */
-    height: string;
-    hspace: number;
-    /**
-      * Gets or sets whether the DLNA PlayTo device is available.
-      */
-    msPlayToDisabled: boolean;
-    /**
-      * Gets or sets the path to the preferred media source. This enables the Play To target device to stream the media content, which can be DRM protected, from a different location, such as a cloud media server.
-      */
-    msPlayToPreferredSourceUri: string;
-    /**
-      * Gets or sets the primary DLNA PlayTo device.
-      */
-    msPlayToPrimary: boolean;
-    /**
-      * Gets the source associated with the media element for use by the PlayToManager.
-      */
-    readonly msPlayToSource: any;
-    /**
-      * Sets or retrieves the name of the object.
-      */
-    name: string;
-    /**
-      * Retrieves the contained object.
-      */
-    readonly object: any;
-    readonly readyState: number;
-    /**
-      * Sets or retrieves a message to be displayed while an object is loading.
-      */
-    standby: string;
-    /**
-      * Sets or retrieves the MIME type of the object.
-      */
-    type: string;
-    /**
-      * Sets or retrieves the URL, often with a bookmark extension (#name), to use as a client-side image map.
-      */
-    useMap: string;
-    /**
-      * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
-      */
-    readonly validationMessage: string;
-    /**
-      * Returns a  ValidityState object that represents the validity states of an element.
-      */
-    readonly validity: ValidityState;
-    vspace: number;
-    /**
-      * Sets or retrieves the width of the object.
-      */
-    width: string;
-    /**
-      * Returns whether an element will successfully validate based on forms validation rules and constraints.
-      */
-    readonly willValidate: boolean;
-    /**
-      * Returns whether a form will validate when it is submitted, without having to submit it.
-      */
-    checkValidity(): boolean;
-    /**
-      * Sets a custom error message that is displayed when a form is submitted.
-      * @param error Sets a custom error message that is displayed when a form is submitted.
-      */
-    setCustomValidity(error: string): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLObjectElement: {
-    prototype: HTMLObjectElement;
-    new(): HTMLObjectElement;
-}
-
-interface HTMLOptGroupElement extends HTMLElement {
-    /**
-      * Sets or retrieves the status of an option.
-      */
-    defaultSelected: boolean;
-    disabled: boolean;
-    /**
-      * Retrieves a reference to the form that the object is embedded in.
-      */
-    readonly form: HTMLFormElement;
-    /**
-      * Sets or retrieves the ordinal position of an option in a list box.
-      */
-    readonly index: number;
-    /**
-      * Sets or retrieves a value that you can use to implement your own label functionality for the object.
-      */
-    label: string;
-    /**
-      * Sets or retrieves whether the option in the list box is the default item.
-      */
-    selected: boolean;
-    /**
-      * Sets or retrieves the text string specified by the option tag.
-      */
-    readonly text: string;
-    /**
-      * Sets or retrieves the value which is returned to the server when the form control is submitted.
-      */
-    value: string;
-}
-
-declare var HTMLOptGroupElement: {
-    prototype: HTMLOptGroupElement;
-    new(): HTMLOptGroupElement;
-}
-
-interface HTMLOptionElement extends HTMLElement {
-    /**
-      * Sets or retrieves the status of an option.
-      */
-    defaultSelected: boolean;
-    disabled: boolean;
-    /**
-      * Retrieves a reference to the form that the object is embedded in.
-      */
-    readonly form: HTMLFormElement;
-    /**
-      * Sets or retrieves the ordinal position of an option in a list box.
-      */
-    readonly index: number;
-    /**
-      * Sets or retrieves a value that you can use to implement your own label functionality for the object.
-      */
-    label: string;
-    /**
-      * Sets or retrieves whether the option in the list box is the default item.
-      */
-    selected: boolean;
-    /**
-      * Sets or retrieves the text string specified by the option tag.
-      */
-    text: string;
-    /**
-      * Sets or retrieves the value which is returned to the server when the form control is submitted.
-      */
-    value: string;
-}
-
-declare var HTMLOptionElement: {
-    prototype: HTMLOptionElement;
-    new(): HTMLOptionElement;
-    create(): HTMLOptionElement;
-}
-
-interface HTMLOptionsCollection extends HTMLCollectionOf<HTMLOptionElement> {
-    length: number;
-    selectedIndex: number;
-    add(element: HTMLOptionElement | HTMLOptGroupElement, before?: HTMLElement | number): void;
-    remove(index: number): void;
-}
-
-declare var HTMLOptionsCollection: {
-    prototype: HTMLOptionsCollection;
-    new(): HTMLOptionsCollection;
-}
-
-interface HTMLParagraphElement extends HTMLElement {
-    /**
-      * Sets or retrieves how the object is aligned with adjacent text. 
-      */
-    align: string;
-    clear: string;
-}
-
-declare var HTMLParagraphElement: {
-    prototype: HTMLParagraphElement;
-    new(): HTMLParagraphElement;
-}
-
-interface HTMLParamElement extends HTMLElement {
-    /**
-      * Sets or retrieves the name of an input parameter for an element.
-      */
-    name: string;
-    /**
-      * Sets or retrieves the content type of the resource designated by the value attribute.
-      */
-    type: string;
-    /**
-      * Sets or retrieves the value of an input parameter for an element.
-      */
-    value: string;
-    /**
-      * Sets or retrieves the data type of the value attribute.
-      */
-    valueType: string;
-}
-
-declare var HTMLParamElement: {
-    prototype: HTMLParamElement;
-    new(): HTMLParamElement;
-}
-
-interface HTMLPictureElement extends HTMLElement {
-}
-
-declare var HTMLPictureElement: {
-    prototype: HTMLPictureElement;
-    new(): HTMLPictureElement;
-}
-
-interface HTMLPreElement extends HTMLElement {
-    /**
-      * Sets or gets a value that you can use to implement your own width functionality for the object.
-      */
-    width: number;
-}
-
-declare var HTMLPreElement: {
-    prototype: HTMLPreElement;
-    new(): HTMLPreElement;
-}
-
-interface HTMLProgressElement extends HTMLElement {
-    /**
-      * Retrieves a reference to the form that the object is embedded in.
-      */
-    readonly form: HTMLFormElement;
-    /**
-      * Defines the maximum, or "done" value for a progress element.
-      */
-    max: number;
-    /**
-      * Returns the quotient of value/max when the value attribute is set (determinate progress bar), or -1 when the value attribute is missing (indeterminate progress bar).
-      */
-    readonly position: number;
-    /**
-      * Sets or gets the current value of a progress element. The value must be a non-negative number between 0 and the max value.
-      */
-    value: number;
-}
-
-declare var HTMLProgressElement: {
-    prototype: HTMLProgressElement;
-    new(): HTMLProgressElement;
-}
-
-interface HTMLQuoteElement extends HTMLElement {
-    /**
-      * Sets or retrieves reference information about the object.
-      */
-    cite: string;
-}
-
-declare var HTMLQuoteElement: {
-    prototype: HTMLQuoteElement;
-    new(): HTMLQuoteElement;
-}
-
-interface HTMLScriptElement extends HTMLElement {
-    async: boolean;
-    /**
-      * Sets or retrieves the character set used to encode the object.
-      */
-    charset: string;
-    /**
-      * Sets or retrieves the status of the script.
-      */
-    defer: boolean;
-    /**
-      * Sets or retrieves the event for which the script is written. 
-      */
-    event: string;
-    /** 
-      * Sets or retrieves the object that is bound to the event script.
-      */
-    htmlFor: string;
-    /**
-      * Retrieves the URL to an external file that contains the source code or data.
-      */
-    src: string;
-    /**
-      * Retrieves or sets the text of the object as a string. 
-      */
-    text: string;
-    /**
-      * Sets or retrieves the MIME type for the associated scripting engine.
-      */
-    type: string;
-    integrity: string;
-}
-
-declare var HTMLScriptElement: {
-    prototype: HTMLScriptElement;
-    new(): HTMLScriptElement;
-}
-
-interface HTMLSelectElement extends HTMLElement {
-    /**
-      * Provides a way to direct a user to a specific field when a document loads. This can provide both direction and convenience for a user, reducing the need to click or tab to a field when a page opens. This attribute is true when present on an element, and false when missing.
-      */
-    autofocus: boolean;
-    disabled: boolean;
-    /**
-      * Retrieves a reference to the form that the object is embedded in. 
-      */
-    readonly form: HTMLFormElement;
-    /**
-      * Sets or retrieves the number of objects in a collection.
-      */
-    length: number;
-    /**
-      * Sets or retrieves the Boolean value indicating whether multiple items can be selected from a list.
-      */
-    multiple: boolean;
-    /**
-      * Sets or retrieves the name of the object.
-      */
-    name: string;
-    readonly options: HTMLOptionsCollection;
-    /**
-      * When present, marks an element that can't be submitted without a value.
-      */
-    required: boolean;
-    /**
-      * Sets or retrieves the index of the selected option in a select object.
-      */
-    selectedIndex: number;
-    selectedOptions: HTMLCollectionOf<HTMLOptionElement>;
-    /**
-      * Sets or retrieves the number of rows in the list box. 
-      */
-    size: number;
-    /**
-      * Retrieves the type of select control based on the value of the MULTIPLE attribute.
-      */
-    readonly type: string;
-    /**
-      * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
-      */
-    readonly validationMessage: string;
-    /**
-      * Returns a  ValidityState object that represents the validity states of an element.
-      */
-    readonly validity: ValidityState;
-    /**
-      * Sets or retrieves the value which is returned to the server when the form control is submitted.
-      */
-    value: string;
-    /**
-      * Returns whether an element will successfully validate based on forms validation rules and constraints.
-      */
-    readonly willValidate: boolean;
-    /**
-      * Adds an element to the areas, controlRange, or options collection.
-      * @param element Variant of type Number that specifies the index position in the collection where the element is placed. If no value is given, the method places the element at the end of the collection.
-      * @param before Variant of type Object that specifies an element to insert before, or null to append the object to the collection. 
-      */
-    add(element: HTMLElement, before?: HTMLElement | number): void;
-    /**
-      * Returns whether a form will validate when it is submitted, without having to submit it.
-      */
-    checkValidity(): boolean;
-    /**
-      * Retrieves a select object or an object from an options collection.
-      * @param name Variant of type Number or String that specifies the object or collection to retrieve. If this parameter is an integer, it is the zero-based index of the object. If this parameter is a string, all objects with matching name or id properties are retrieved, and a collection is returned if more than one match is made.
-      * @param index Variant of type Number that specifies the zero-based index of the object to retrieve when a collection is returned.
-      */
-    item(name?: any, index?: any): any;
-    /**
-      * Retrieves a select object or an object from an options collection.
-      * @param namedItem A String that specifies the name or id property of the object to retrieve. A collection is returned if more than one match is made.
-      */
-    namedItem(name: string): any;
-    /**
-      * Removes an element from the collection.
-      * @param index Number that specifies the zero-based index of the element to remove from the collection.
-      */
-    remove(index?: number): void;
-    /**
-      * Sets a custom error message that is displayed when a form is submitted.
-      * @param error Sets a custom error message that is displayed when a form is submitted.
-      */
-    setCustomValidity(error: string): void;
-    [name: string]: any;
-}
-
-declare var HTMLSelectElement: {
-    prototype: HTMLSelectElement;
-    new(): HTMLSelectElement;
-}
-
-interface HTMLSourceElement extends HTMLElement {
-    /**
-      * Gets or sets the intended media type of the media source.
-     */
-    media: string;
-    msKeySystem: string;
-    sizes: string;
-    /**
-      * The address or URL of the a media resource that is to be considered.
-      */
-    src: string;
-    srcset: string;
-    /**
-     * Gets or sets the MIME type of a media resource.
-     */
-    type: string;
-}
-
-declare var HTMLSourceElement: {
-    prototype: HTMLSourceElement;
-    new(): HTMLSourceElement;
-}
-
-interface HTMLSpanElement extends HTMLElement {
-}
-
-declare var HTMLSpanElement: {
-    prototype: HTMLSpanElement;
-    new(): HTMLSpanElement;
-}
-
-interface HTMLStyleElement extends HTMLElement, LinkStyle {
-    disabled: boolean;
-    /**
-      * Sets or retrieves the media type.
-      */
-    media: string;
-    /**
-      * Retrieves the CSS language in which the style sheet is written.
-      */
-    type: string;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLStyleElement: {
-    prototype: HTMLStyleElement;
-    new(): HTMLStyleElement;
-}
-
-interface HTMLTableCaptionElement extends HTMLElement {
-    /**
-      * Sets or retrieves the alignment of the caption or legend.
-      */
-    align: string;
-    /**
-      * Sets or retrieves whether the caption appears at the top or bottom of the table.
-      */
-    vAlign: string;
-}
-
-declare var HTMLTableCaptionElement: {
-    prototype: HTMLTableCaptionElement;
-    new(): HTMLTableCaptionElement;
-}
-
-interface HTMLTableCellElement extends HTMLElement, HTMLTableAlignment {
-    /**
-      * Sets or retrieves abbreviated text for the object.
-      */
-    abbr: string;
-    /**
-      * Sets or retrieves how the object is aligned with adjacent text.
-      */
-    align: string;
-    /**
-      * Sets or retrieves a comma-delimited list of conceptual categories associated with the object.
-      */
-    axis: string;
-    bgColor: any;
-    /**
-      * Retrieves the position of the object in the cells collection of a row.
-      */
-    readonly cellIndex: number;
-    /**
-      * Sets or retrieves the number columns in the table that the object should span.
-      */
-    colSpan: number;
-    /**
-      * Sets or retrieves a list of header cells that provide information for the object.
-      */
-    headers: string;
-    /**
-      * Sets or retrieves the height of the object.
-      */
-    height: any;
-    /**
-      * Sets or retrieves whether the browser automatically performs wordwrap.
-      */
-    noWrap: boolean;
-    /**
-      * Sets or retrieves how many rows in a table the cell should span.
-      */
-    rowSpan: number;
-    /**
-      * Sets or retrieves the group of cells in a table to which the object's information applies.
-      */
-    scope: string;
-    /**
-      * Sets or retrieves the width of the object.
-      */
-    width: string;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLTableCellElement: {
-    prototype: HTMLTableCellElement;
-    new(): HTMLTableCellElement;
-}
-
-interface HTMLTableColElement extends HTMLElement, HTMLTableAlignment {
-    /**
-      * Sets or retrieves the alignment of the object relative to the display or table.
-      */
-    align: string;
-    /**
-      * Sets or retrieves the number of columns in the group.
-      */
-    span: number;
-    /**
-      * Sets or retrieves the width of the object.
-      */
-    width: any;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLTableColElement: {
-    prototype: HTMLTableColElement;
-    new(): HTMLTableColElement;
-}
-
-interface HTMLTableDataCellElement extends HTMLTableCellElement {
-}
-
-declare var HTMLTableDataCellElement: {
-    prototype: HTMLTableDataCellElement;
-    new(): HTMLTableDataCellElement;
-}
-
-interface HTMLTableElement extends HTMLElement {
-    /**
-      * Sets or retrieves a value that indicates the table alignment.
-      */
-    align: string;
-    bgColor: any;
-    /**
-      * Sets or retrieves the width of the border to draw around the object.
-      */
-    border: string;
-    /**
-      * Sets or retrieves the border color of the object. 
-      */
-    borderColor: any;
-    /**
-      * Retrieves the caption object of a table.
-      */
-    caption: HTMLTableCaptionElement;
-    /**
-      * Sets or retrieves the amount of space between the border of the cell and the content of the cell.
-      */
-    cellPadding: string;
-    /**
-      * Sets or retrieves the amount of space between cells in a table.
-      */
-    cellSpacing: string;
-    /**
-      * Sets or retrieves the number of columns in the table.
-      */
-    cols: number;
-    /**
-      * Sets or retrieves the way the border frame around the table is displayed.
-      */
-    frame: string;
-    /**
-      * Sets or retrieves the height of the object.
-      */
-    height: any;
-    /**
-      * Sets or retrieves the number of horizontal rows contained in the object.
-      */
-    rows: HTMLCollectionOf<HTMLTableRowElement>;
-    /**
-      * Sets or retrieves which dividing lines (inner borders) are displayed.
-      */
-    rules: string;
-    /**
-      * Sets or retrieves a description and/or structure of the object.
-      */
-    summary: string;
-    /**
-      * Retrieves a collection of all tBody objects in the table. Objects in this collection are in source order.
-      */
-    tBodies: HTMLCollectionOf<HTMLTableSectionElement>;
-    /**
-      * Retrieves the tFoot object of the table.
-      */
-    tFoot: HTMLTableSectionElement;
-    /**
-      * Retrieves the tHead object of the table.
-      */
-    tHead: HTMLTableSectionElement;
-    /**
-      * Sets or retrieves the width of the object.
-      */
-    width: string;
-    /**
-      * Creates an empty caption element in the table.
-      */
-    createCaption(): HTMLTableCaptionElement;
-    /**
-      * Creates an empty tBody element in the table.
-      */
-    createTBody(): HTMLTableSectionElement;
-    /**
-      * Creates an empty tFoot element in the table.
-      */
-    createTFoot(): HTMLTableSectionElement;
-    /**
-      * Returns the tHead element object if successful, or null otherwise.
-      */
-    createTHead(): HTMLTableSectionElement;
-    /**
-      * Deletes the caption element and its contents from the table.
-      */
-    deleteCaption(): void;
-    /**
-      * Removes the specified row (tr) from the element and from the rows collection.
-      * @param index Number that specifies the zero-based position in the rows collection of the row to remove.
-      */
-    deleteRow(index?: number): void;
-    /**
-      * Deletes the tFoot element and its contents from the table.
-      */
-    deleteTFoot(): void;
-    /**
-      * Deletes the tHead element and its contents from the table.
-      */
-    deleteTHead(): void;
-    /**
-      * Creates a new row (tr) in the table, and adds the row to the rows collection.
-      * @param index Number that specifies where to insert the row in the rows collection. The default value is -1, which appends the new row to the end of the rows collection.
-      */
-    insertRow(index?: number): HTMLTableRowElement;
-}
-
-declare var HTMLTableElement: {
-    prototype: HTMLTableElement;
-    new(): HTMLTableElement;
-}
-
-interface HTMLTableHeaderCellElement extends HTMLTableCellElement {
-    /**
-      * Sets or retrieves the group of cells in a table to which the object's information applies.
-      */
-    scope: string;
-}
-
-declare var HTMLTableHeaderCellElement: {
-    prototype: HTMLTableHeaderCellElement;
-    new(): HTMLTableHeaderCellElement;
-}
-
-interface HTMLTableRowElement extends HTMLElement, HTMLTableAlignment {
-    /**
-      * Sets or retrieves how the object is aligned with adjacent text.
-      */
-    align: string;
-    bgColor: any;
-    /**
-      * Retrieves a collection of all cells in the table row.
-      */
-    cells: HTMLCollectionOf<HTMLTableDataCellElement | HTMLTableHeaderCellElement>;
-    /**
-      * Sets or retrieves the height of the object.
-      */
-    height: any;
-    /**
-      * Retrieves the position of the object in the rows collection for the table.
-      */
-    readonly rowIndex: number;
-    /**
-      * Retrieves the position of the object in the collection.
-      */
-    readonly sectionRowIndex: number;
-    /**
-      * Removes the specified cell from the table row, as well as from the cells collection.
-      * @param index Number that specifies the zero-based position of the cell to remove from the table row. If no value is provided, the last cell in the cells collection is deleted.
-      */
-    deleteCell(index?: number): void;
-    /**
-      * Creates a new cell in the table row, and adds the cell to the cells collection.
-      * @param index Number that specifies where to insert the cell in the tr. The default value is -1, which appends the new cell to the end of the cells collection.
-      */
-    insertCell(index?: number): HTMLTableDataCellElement;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLTableRowElement: {
-    prototype: HTMLTableRowElement;
-    new(): HTMLTableRowElement;
-}
-
-interface HTMLTableSectionElement extends HTMLElement, HTMLTableAlignment {
-    /**
-      * Sets or retrieves a value that indicates the table alignment.
-      */
-    align: string;
-    /**
-      * Sets or retrieves the number of horizontal rows contained in the object.
-      */
-    rows: HTMLCollectionOf<HTMLTableRowElement>;
-    /**
-      * Removes the specified row (tr) from the element and from the rows collection.
-      * @param index Number that specifies the zero-based position in the rows collection of the row to remove.
-      */
-    deleteRow(index?: number): void;
-    /**
-      * Creates a new row (tr) in the table, and adds the row to the rows collection.
-      * @param index Number that specifies where to insert the row in the rows collection. The default value is -1, which appends the new row to the end of the rows collection.
-      */
-    insertRow(index?: number): HTMLTableRowElement;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLTableSectionElement: {
-    prototype: HTMLTableSectionElement;
-    new(): HTMLTableSectionElement;
-}
-
-interface HTMLTemplateElement extends HTMLElement {
-    readonly content: DocumentFragment;
-}
-
-declare var HTMLTemplateElement: {
-    prototype: HTMLTemplateElement;
-    new(): HTMLTemplateElement;
-}
-
-interface HTMLTextAreaElement extends HTMLElement {
-    /**
-      * Provides a way to direct a user to a specific field when a document loads. This can provide both direction and convenience for a user, reducing the need to click or tab to a field when a page opens. This attribute is true when present on an element, and false when missing.
-      */
-    autofocus: boolean;
-    /**
-      * Sets or retrieves the width of the object.
-      */
-    cols: number;
-    /**
-      * Sets or retrieves the initial contents of the object.
-      */
-    defaultValue: string;
-    disabled: boolean;
-    /**
-      * Retrieves a reference to the form that the object is embedded in.
-      */
-    readonly form: HTMLFormElement;
-    /**
-      * Sets or retrieves the maximum number of characters that the user can enter in a text control.
-      */
-    maxLength: number;
-    /**
-      * Sets or retrieves the name of the object.
-      */
-    name: string;
-    /**
-      * Gets or sets a text string that is displayed in an input field as a hint or prompt to users as the format or type of information they need to enter.The text appears in an input field until the user puts focus on the field.
-      */
-    placeholder: string;
-    /**
-      * Sets or retrieves the value indicated whether the content of the object is read-only.
-      */
-    readOnly: boolean;
-    /**
-      * When present, marks an element that can't be submitted without a value.
-      */
-    required: boolean;
-    /**
-      * Sets or retrieves the number of horizontal rows contained in the object.
-      */
-    rows: number;
-    /**
-      * Gets or sets the end position or offset of a text selection.
-      */
-    selectionEnd: number;
-    /**
-      * Gets or sets the starting position or offset of a text selection.
-      */
-    selectionStart: number;
-    /**
-      * Sets or retrieves the value indicating whether the control is selected.
-      */
-    status: any;
-    /**
-      * Retrieves the type of control.
-      */
-    readonly type: string;
-    /**
-      * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
-      */
-    readonly validationMessage: string;
-    /**
-      * Returns a  ValidityState object that represents the validity states of an element.
-      */
-    readonly validity: ValidityState;
-    /**
-      * Retrieves or sets the text in the entry field of the textArea element.
-      */
-    value: string;
-    /**
-      * Returns whether an element will successfully validate based on forms validation rules and constraints.
-      */
-    readonly willValidate: boolean;
-    /**
-      * Sets or retrieves how to handle wordwrapping in the object.
-      */
-    wrap: string;
-    minLength: number;
-    /**
-      * Returns whether a form will validate when it is submitted, without having to submit it.
-      */
-    checkValidity(): boolean;
-    /**
-      * Highlights the input area of a form element.
-      */
-    select(): void;
-    /**
-      * Sets a custom error message that is displayed when a form is submitted.
-      * @param error Sets a custom error message that is displayed when a form is submitted.
-      */
-    setCustomValidity(error: string): void;
-    /**
-      * Sets the start and end positions of a selection in a text field.
-      * @param start The offset into the text field for the start of the selection.
-      * @param end The offset into the text field for the end of the selection.
-      */
-    setSelectionRange(start: number, end: number): void;
-}
-
-declare var HTMLTextAreaElement: {
-    prototype: HTMLTextAreaElement;
-    new(): HTMLTextAreaElement;
-}
-
-interface HTMLTitleElement extends HTMLElement {
-    /**
-      * Retrieves or sets the text of the object as a string. 
-      */
-    text: string;
-}
-
-declare var HTMLTitleElement: {
-    prototype: HTMLTitleElement;
-    new(): HTMLTitleElement;
-}
-
-interface HTMLTrackElement extends HTMLElement {
-    default: boolean;
-    kind: string;
-    label: string;
-    readonly readyState: number;
-    src: string;
-    srclang: string;
-    readonly track: TextTrack;
-    readonly ERROR: number;
-    readonly LOADED: number;
-    readonly LOADING: number;
-    readonly NONE: number;
-}
-
-declare var HTMLTrackElement: {
-    prototype: HTMLTrackElement;
-    new(): HTMLTrackElement;
-    readonly ERROR: number;
-    readonly LOADED: number;
-    readonly LOADING: number;
-    readonly NONE: number;
-}
-
-interface HTMLUListElement extends HTMLElement {
-    compact: boolean;
-    type: string;
-}
-
-declare var HTMLUListElement: {
-    prototype: HTMLUListElement;
-    new(): HTMLUListElement;
-}
-
-interface HTMLUnknownElement extends HTMLElement {
-}
-
-declare var HTMLUnknownElement: {
-    prototype: HTMLUnknownElement;
-    new(): HTMLUnknownElement;
-}
-
-interface HTMLVideoElement extends HTMLMediaElement {
-    /**
-      * Gets or sets the height of the video element.
-      */
-    height: number;
-    msHorizontalMirror: boolean;
-    readonly msIsLayoutOptimalForPlayback: boolean;
-    readonly msIsStereo3D: boolean;
-    msStereo3DPackingMode: string;
-    msStereo3DRenderMode: string;
-    msZoom: boolean;
-    onMSVideoFormatChanged: (this: this, ev: Event) => any;
-    onMSVideoFrameStepCompleted: (this: this, ev: Event) => any;
-    onMSVideoOptimalLayoutChanged: (this: this, ev: Event) => any;
-    /**
-      * Gets or sets a URL of an image to display, for example, like a movie poster. This can be a still frame from the video, or another image if no video data is available.
-      */
-    poster: string;
-    /**
-      * Gets the intrinsic height of a video in CSS pixels, or zero if the dimensions are not known.
-      */
-    readonly videoHeight: number;
-    /**
-      * Gets the intrinsic width of a video in CSS pixels, or zero if the dimensions are not known.
-      */
-    readonly videoWidth: number;
-    readonly webkitDisplayingFullscreen: boolean;
-    readonly webkitSupportsFullscreen: boolean;
-    /**
-      * Gets or sets the width of the video element.
-      */
-    width: number;
-    getVideoPlaybackQuality(): VideoPlaybackQuality;
-    msFrameStep(forward: boolean): void;
-    msInsertVideoEffect(activatableClassId: string, effectRequired: boolean, config?: any): void;
-    msSetVideoRectangle(left: number, top: number, right: number, bottom: number): void;
-    webkitEnterFullScreen(): void;
-    webkitEnterFullscreen(): void;
-    webkitExitFullScreen(): void;
-    webkitExitFullscreen(): void;
-    addEventListener(type: "MSContentZoom", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureChange", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureDoubleTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureEnd", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureHold", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGotPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSInertiaStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSLostPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSManipulationStateChanged", listener: (this: this, ev: MSManipulationEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerCancel", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerDown", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerEnter", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerLeave", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerMove", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOut", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOver", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerUp", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSVideoFormatChanged", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSVideoFrameStepCompleted", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSVideoOptimalLayoutChanged", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "abort", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "activate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ariarequest", listener: (this: this, ev: AriaRequestEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforecopy", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforecut", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforedeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforepaste", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "blur", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplay", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplaythrough", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "change", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "click", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "command", listener: (this: this, ev: CommandEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "contextmenu", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "copy", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "cuechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "cut", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dblclick", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "deactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drag", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragend", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragenter", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragleave", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragover", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragstart", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drop", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "durationchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "emptied", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "encrypted", listener: (this: this, ev: MediaEncryptedEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ended", listener: (this: this, ev: MediaStreamErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "focus", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "gotpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "input", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "invalid", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "keydown", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keypress", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keyup", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadeddata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadedmetadata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "lostpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousedown", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseenter", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseleave", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousemove", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseout", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseover", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseup", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousewheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "msneedkey", listener: (this: this, ev: MSMediaKeyNeededEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "paste", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pause", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "play", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "playing", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointercancel", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerdown", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerenter", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerleave", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointermove", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerout", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerover", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerup", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "progress", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ratechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "reset", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "scroll", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeked", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeking", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "select", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "selectstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "stalled", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "submit", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "suspend", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "timeupdate", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchcancel", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchend", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchmove", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchstart", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "volumechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "waiting", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenerror", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "wheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLVideoElement: {
-    prototype: HTMLVideoElement;
-    new(): HTMLVideoElement;
-}
-
-interface HashChangeEvent extends Event {
-    readonly newURL: string | null;
-    readonly oldURL: string | null;
-}
-
-declare var HashChangeEvent: {
-    prototype: HashChangeEvent;
-    new(type: string, eventInitDict?: HashChangeEventInit): HashChangeEvent;
-}
-
-interface History {
-    readonly length: number;
-    readonly state: any;
-    scrollRestoration: ScrollRestoration;
-    back(): void;
-    forward(): void;
-    go(delta?: number): void;
-    pushState(data: any, title: string, url?: string | null): void;
-    replaceState(data: any, title: string, url?: string | null): void;
-}
-
-declare var History: {
-    prototype: History;
-    new(): History;
-}
-
-interface IDBCursor {
-    readonly direction: string;
-    key: IDBKeyRange | IDBValidKey;
-    readonly primaryKey: any;
-    source: IDBObjectStore | IDBIndex;
-    advance(count: number): void;
-    continue(key?: IDBKeyRange | IDBValidKey): void;
-    delete(): IDBRequest;
-    update(value: any): IDBRequest;
-    readonly NEXT: string;
-    readonly NEXT_NO_DUPLICATE: string;
-    readonly PREV: string;
-    readonly PREV_NO_DUPLICATE: string;
-}
-
-declare var IDBCursor: {
-    prototype: IDBCursor;
-    new(): IDBCursor;
-    readonly NEXT: string;
-    readonly NEXT_NO_DUPLICATE: string;
-    readonly PREV: string;
-    readonly PREV_NO_DUPLICATE: string;
-}
-
-interface IDBCursorWithValue extends IDBCursor {
-    readonly value: any;
-}
-
-declare var IDBCursorWithValue: {
-    prototype: IDBCursorWithValue;
-    new(): IDBCursorWithValue;
-}
-
-interface IDBDatabase extends EventTarget {
-    readonly name: string;
-    readonly objectStoreNames: DOMStringList;
-    onabort: (this: this, ev: Event) => any;
-    onerror: (this: this, ev: ErrorEvent) => any;
-    version: number;
-    onversionchange: (ev: IDBVersionChangeEvent) => any;
-    close(): void;
-    createObjectStore(name: string, optionalParameters?: IDBObjectStoreParameters): IDBObjectStore;
-    deleteObjectStore(name: string): void;
-    transaction(storeNames: string | string[], mode?: string): IDBTransaction;
-    addEventListener(type: "versionchange", listener: (ev: IDBVersionChangeEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "abort", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var IDBDatabase: {
-    prototype: IDBDatabase;
-    new(): IDBDatabase;
-}
-
-interface IDBFactory {
-    cmp(first: any, second: any): number;
-    deleteDatabase(name: string): IDBOpenDBRequest;
-    open(name: string, version?: number): IDBOpenDBRequest;
-}
-
-declare var IDBFactory: {
-    prototype: IDBFactory;
-    new(): IDBFactory;
-}
-
-interface IDBIndex {
-    keyPath: string | string[];
-    readonly name: string;
-    readonly objectStore: IDBObjectStore;
-    readonly unique: boolean;
-    multiEntry: boolean;
-    count(key?: IDBKeyRange | IDBValidKey): IDBRequest;
-    get(key: IDBKeyRange | IDBValidKey): IDBRequest;
-    getKey(key: IDBKeyRange | IDBValidKey): IDBRequest;
-    openCursor(range?: IDBKeyRange | IDBValidKey, direction?: string): IDBRequest;
-    openKeyCursor(range?: IDBKeyRange | IDBValidKey, direction?: string): IDBRequest;
-}
-
-declare var IDBIndex: {
-    prototype: IDBIndex;
-    new(): IDBIndex;
-}
-
-interface IDBKeyRange {
-    readonly lower: any;
-    readonly lowerOpen: boolean;
-    readonly upper: any;
-    readonly upperOpen: boolean;
-}
-
-declare var IDBKeyRange: {
-    prototype: IDBKeyRange;
-    new(): IDBKeyRange;
-    bound(lower: any, upper: any, lowerOpen?: boolean, upperOpen?: boolean): IDBKeyRange;
-    lowerBound(lower: any, open?: boolean): IDBKeyRange;
-    only(value: any): IDBKeyRange;
-    upperBound(upper: any, open?: boolean): IDBKeyRange;
-}
-
-interface IDBObjectStore {
-    readonly indexNames: DOMStringList;
-    keyPath: string | string[];
-    readonly name: string;
-    readonly transaction: IDBTransaction;
-    autoIncrement: boolean;
-    add(value: any, key?: IDBKeyRange | IDBValidKey): IDBRequest;
-    clear(): IDBRequest;
-    count(key?: IDBKeyRange | IDBValidKey): IDBRequest;
-    createIndex(name: string, keyPath: string | string[], optionalParameters?: IDBIndexParameters): IDBIndex;
-    delete(key: IDBKeyRange | IDBValidKey): IDBRequest;
-    deleteIndex(indexName: string): void;
-    get(key: any): IDBRequest;
-    index(name: string): IDBIndex;
-    openCursor(range?: IDBKeyRange | IDBValidKey, direction?: string): IDBRequest;
-    put(value: any, key?: IDBKeyRange | IDBValidKey): IDBRequest;
-}
-
-declare var IDBObjectStore: {
-    prototype: IDBObjectStore;
-    new(): IDBObjectStore;
-}
-
-interface IDBOpenDBRequest extends IDBRequest {
-    onblocked: (this: this, ev: Event) => any;
-    onupgradeneeded: (this: this, ev: IDBVersionChangeEvent) => any;
-    addEventListener(type: "blocked", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "success", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "upgradeneeded", listener: (this: this, ev: IDBVersionChangeEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var IDBOpenDBRequest: {
-    prototype: IDBOpenDBRequest;
-    new(): IDBOpenDBRequest;
-}
-
-interface IDBRequest extends EventTarget {
-    readonly error: DOMError;
-    onerror: (this: this, ev: ErrorEvent) => any;
-    onsuccess: (this: this, ev: Event) => any;
-    readonly readyState: string;
-    readonly result: any;
-    source: IDBObjectStore | IDBIndex | IDBCursor;
-    readonly transaction: IDBTransaction;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "success", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var IDBRequest: {
-    prototype: IDBRequest;
-    new(): IDBRequest;
-}
-
-interface IDBTransaction extends EventTarget {
-    readonly db: IDBDatabase;
-    readonly error: DOMError;
-    readonly mode: string;
-    onabort: (this: this, ev: Event) => any;
-    oncomplete: (this: this, ev: Event) => any;
-    onerror: (this: this, ev: ErrorEvent) => any;
-    abort(): void;
-    objectStore(name: string): IDBObjectStore;
-    readonly READ_ONLY: string;
-    readonly READ_WRITE: string;
-    readonly VERSION_CHANGE: string;
-    addEventListener(type: "abort", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "complete", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var IDBTransaction: {
-    prototype: IDBTransaction;
-    new(): IDBTransaction;
-    readonly READ_ONLY: string;
-    readonly READ_WRITE: string;
-    readonly VERSION_CHANGE: string;
-}
-
-interface IDBVersionChangeEvent extends Event {
-    readonly newVersion: number | null;
-    readonly oldVersion: number;
-}
-
-declare var IDBVersionChangeEvent: {
-    prototype: IDBVersionChangeEvent;
-    new(): IDBVersionChangeEvent;
-}
-
-interface ImageData {
-    data: Uint8ClampedArray;
-    readonly height: number;
-    readonly width: number;
-}
-
-declare var ImageData: {
-    prototype: ImageData;
-    new(width: number, height: number): ImageData;
-    new(array: Uint8ClampedArray, width: number, height: number): ImageData;
-}
-
-interface KeyboardEvent extends UIEvent {
-    readonly altKey: boolean;
-    readonly char: string | null;
-    readonly charCode: number;
-    readonly ctrlKey: boolean;
-    readonly key: string;
-    readonly keyCode: number;
-    readonly locale: string;
-    readonly location: number;
-    readonly metaKey: boolean;
-    readonly repeat: boolean;
-    readonly shiftKey: boolean;
-    readonly which: number;
-    readonly code: string;
-    getModifierState(keyArg: string): boolean;
-    initKeyboardEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, keyArg: string, locationArg: number, modifiersListArg: string, repeat: boolean, locale: string): void;
-    readonly DOM_KEY_LOCATION_JOYSTICK: number;
-    readonly DOM_KEY_LOCATION_LEFT: number;
-    readonly DOM_KEY_LOCATION_MOBILE: number;
-    readonly DOM_KEY_LOCATION_NUMPAD: number;
-    readonly DOM_KEY_LOCATION_RIGHT: number;
-    readonly DOM_KEY_LOCATION_STANDARD: number;
-}
-
-declare var KeyboardEvent: {
-    prototype: KeyboardEvent;
-    new(typeArg: string, eventInitDict?: KeyboardEventInit): KeyboardEvent;
-    readonly DOM_KEY_LOCATION_JOYSTICK: number;
-    readonly DOM_KEY_LOCATION_LEFT: number;
-    readonly DOM_KEY_LOCATION_MOBILE: number;
-    readonly DOM_KEY_LOCATION_NUMPAD: number;
-    readonly DOM_KEY_LOCATION_RIGHT: number;
-    readonly DOM_KEY_LOCATION_STANDARD: number;
-}
-
-interface ListeningStateChangedEvent extends Event {
-    readonly label: string;
-    readonly state: string;
-}
-
-declare var ListeningStateChangedEvent: {
-    prototype: ListeningStateChangedEvent;
-    new(): ListeningStateChangedEvent;
-}
-
-interface Location {
-    hash: string;
-    host: string;
-    hostname: string;
-    href: string;
-    readonly origin: string;
-    pathname: string;
-    port: string;
-    protocol: string;
-    search: string;
-    assign(url: string): void;
-    reload(forcedReload?: boolean): void;
-    replace(url: string): void;
-    toString(): string;
-}
-
-declare var Location: {
-    prototype: Location;
-    new(): Location;
-}
-
-interface LongRunningScriptDetectedEvent extends Event {
-    readonly executionTime: number;
-    stopPageScriptExecution: boolean;
-}
-
-declare var LongRunningScriptDetectedEvent: {
-    prototype: LongRunningScriptDetectedEvent;
-    new(): LongRunningScriptDetectedEvent;
-}
-
-interface MSApp {
-    clearTemporaryWebDataAsync(): MSAppAsyncOperation;
-    createBlobFromRandomAccessStream(type: string, seeker: any): Blob;
-    createDataPackage(object: any): any;
-    createDataPackageFromSelection(): any;
-    createFileFromStorageFile(storageFile: any): File;
-    createStreamFromInputStream(type: string, inputStream: any): MSStream;
-    execAsyncAtPriority(asynchronousCallback: MSExecAtPriorityFunctionCallback, priority: string, ...args: any[]): void;
-    execAtPriority(synchronousCallback: MSExecAtPriorityFunctionCallback, priority: string, ...args: any[]): any;
-    getCurrentPriority(): string;
-    getHtmlPrintDocumentSourceAsync(htmlDoc: any): PromiseLike<any>;
-    getViewId(view: any): any;
-    isTaskScheduledAtPriorityOrHigher(priority: string): boolean;
-    pageHandlesAllApplicationActivations(enabled: boolean): void;
-    suppressSubdownloadCredentialPrompts(suppress: boolean): void;
-    terminateApp(exceptionObject: any): void;
-    readonly CURRENT: string;
-    readonly HIGH: string;
-    readonly IDLE: string;
-    readonly NORMAL: string;
-}
-declare var MSApp: MSApp;
-
-interface MSAppAsyncOperation extends EventTarget {
-    readonly error: DOMError;
-    oncomplete: (this: this, ev: Event) => any;
-    onerror: (this: this, ev: ErrorEvent) => any;
-    readonly readyState: number;
-    readonly result: any;
-    start(): void;
-    readonly COMPLETED: number;
-    readonly ERROR: number;
-    readonly STARTED: number;
-    addEventListener(type: "complete", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var MSAppAsyncOperation: {
-    prototype: MSAppAsyncOperation;
-    new(): MSAppAsyncOperation;
-    readonly COMPLETED: number;
-    readonly ERROR: number;
-    readonly STARTED: number;
-}
-
-interface MSAssertion {
-    readonly id: string;
-    readonly type: string;
-}
-
-declare var MSAssertion: {
-    prototype: MSAssertion;
-    new(): MSAssertion;
-}
-
-interface MSBlobBuilder {
-    append(data: any, endings?: string): void;
-    getBlob(contentType?: string): Blob;
-}
-
-declare var MSBlobBuilder: {
-    prototype: MSBlobBuilder;
-    new(): MSBlobBuilder;
-}
-
-interface MSCredentials {
-    getAssertion(challenge: string, filter?: MSCredentialFilter, params?: MSSignatureParameters): PromiseLike<MSAssertion>;
-    makeCredential(accountInfo: MSAccountInfo, params: MSCredentialParameters[], challenge?: string): PromiseLike<MSAssertion>;
-}
-
-declare var MSCredentials: {
-    prototype: MSCredentials;
-    new(): MSCredentials;
-}
-
-interface MSFIDOCredentialAssertion extends MSAssertion {
-    readonly algorithm: string | Algorithm;
-    readonly attestation: any;
-    readonly publicKey: string;
-    readonly transportHints: string[];
-}
-
-declare var MSFIDOCredentialAssertion: {
-    prototype: MSFIDOCredentialAssertion;
-    new(): MSFIDOCredentialAssertion;
-}
-
-interface MSFIDOSignature {
-    readonly authnrData: string;
-    readonly clientData: string;
-    readonly signature: string;
-}
-
-declare var MSFIDOSignature: {
-    prototype: MSFIDOSignature;
-    new(): MSFIDOSignature;
-}
-
-interface MSFIDOSignatureAssertion extends MSAssertion {
-    readonly signature: MSFIDOSignature;
-}
-
-declare var MSFIDOSignatureAssertion: {
-    prototype: MSFIDOSignatureAssertion;
-    new(): MSFIDOSignatureAssertion;
-}
-
-interface MSGesture {
-    target: Element;
-    addPointer(pointerId: number): void;
-    stop(): void;
-}
-
-declare var MSGesture: {
-    prototype: MSGesture;
-    new(): MSGesture;
-}
-
-interface MSGestureEvent extends UIEvent {
-    readonly clientX: number;
-    readonly clientY: number;
-    readonly expansion: number;
-    readonly gestureObject: any;
-    readonly hwTimestamp: number;
-    readonly offsetX: number;
-    readonly offsetY: number;
-    readonly rotation: number;
-    readonly scale: number;
-    readonly screenX: number;
-    readonly screenY: number;
-    readonly translationX: number;
-    readonly translationY: number;
-    readonly velocityAngular: number;
-    readonly velocityExpansion: number;
-    readonly velocityX: number;
-    readonly velocityY: number;
-    initGestureEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, offsetXArg: number, offsetYArg: number, translationXArg: number, translationYArg: number, scaleArg: number, expansionArg: number, rotationArg: number, velocityXArg: number, velocityYArg: number, velocityExpansionArg: number, velocityAngularArg: number, hwTimestampArg: number): void;
-    readonly MSGESTURE_FLAG_BEGIN: number;
-    readonly MSGESTURE_FLAG_CANCEL: number;
-    readonly MSGESTURE_FLAG_END: number;
-    readonly MSGESTURE_FLAG_INERTIA: number;
-    readonly MSGESTURE_FLAG_NONE: number;
-}
-
-declare var MSGestureEvent: {
-    prototype: MSGestureEvent;
-    new(): MSGestureEvent;
-    readonly MSGESTURE_FLAG_BEGIN: number;
-    readonly MSGESTURE_FLAG_CANCEL: number;
-    readonly MSGESTURE_FLAG_END: number;
-    readonly MSGESTURE_FLAG_INERTIA: number;
-    readonly MSGESTURE_FLAG_NONE: number;
-}
-
-interface MSGraphicsTrust {
-    readonly constrictionActive: boolean;
-    readonly status: string;
-}
-
-declare var MSGraphicsTrust: {
-    prototype: MSGraphicsTrust;
-    new(): MSGraphicsTrust;
-}
-
-interface MSHTMLWebViewElement extends HTMLElement {
-    readonly canGoBack: boolean;
-    readonly canGoForward: boolean;
-    readonly containsFullScreenElement: boolean;
-    readonly documentTitle: string;
-    height: number;
-    readonly settings: MSWebViewSettings;
-    src: string;
-    width: number;
-    addWebAllowedObject(name: string, applicationObject: any): void;
-    buildLocalStreamUri(contentIdentifier: string, relativePath: string): string;
-    capturePreviewToBlobAsync(): MSWebViewAsyncOperation;
-    captureSelectedContentToDataPackageAsync(): MSWebViewAsyncOperation;
-    getDeferredPermissionRequestById(id: number): DeferredPermissionRequest;
-    getDeferredPermissionRequests(): DeferredPermissionRequest[];
-    goBack(): void;
-    goForward(): void;
-    invokeScriptAsync(scriptName: string, ...args: any[]): MSWebViewAsyncOperation;
-    navigate(uri: string): void;
-    navigateToLocalStreamUri(source: string, streamResolver: any): void;
-    navigateToString(contents: string): void;
-    navigateWithHttpRequestMessage(requestMessage: any): void;
-    refresh(): void;
-    stop(): void;
-}
-
-declare var MSHTMLWebViewElement: {
-    prototype: MSHTMLWebViewElement;
-    new(): MSHTMLWebViewElement;
-}
-
-interface MSInputMethodContext extends EventTarget {
-    readonly compositionEndOffset: number;
-    readonly compositionStartOffset: number;
-    oncandidatewindowhide: (this: this, ev: Event) => any;
-    oncandidatewindowshow: (this: this, ev: Event) => any;
-    oncandidatewindowupdate: (this: this, ev: Event) => any;
-    readonly target: HTMLElement;
-    getCandidateWindowClientRect(): ClientRect;
-    getCompositionAlternatives(): string[];
-    hasComposition(): boolean;
-    isCandidateWindowVisible(): boolean;
-    addEventListener(type: "MSCandidateWindowHide", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSCandidateWindowShow", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSCandidateWindowUpdate", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var MSInputMethodContext: {
-    prototype: MSInputMethodContext;
-    new(): MSInputMethodContext;
-}
-
-interface MSManipulationEvent extends UIEvent {
-    readonly currentState: number;
-    readonly inertiaDestinationX: number;
-    readonly inertiaDestinationY: number;
-    readonly lastState: number;
-    initMSManipulationEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, lastState: number, currentState: number): void;
-    readonly MS_MANIPULATION_STATE_ACTIVE: number;
-    readonly MS_MANIPULATION_STATE_CANCELLED: number;
-    readonly MS_MANIPULATION_STATE_COMMITTED: number;
-    readonly MS_MANIPULATION_STATE_DRAGGING: number;
-    readonly MS_MANIPULATION_STATE_INERTIA: number;
-    readonly MS_MANIPULATION_STATE_PRESELECT: number;
-    readonly MS_MANIPULATION_STATE_SELECTING: number;
-    readonly MS_MANIPULATION_STATE_STOPPED: number;
-}
-
-declare var MSManipulationEvent: {
-    prototype: MSManipulationEvent;
-    new(): MSManipulationEvent;
-    readonly MS_MANIPULATION_STATE_ACTIVE: number;
-    readonly MS_MANIPULATION_STATE_CANCELLED: number;
-    readonly MS_MANIPULATION_STATE_COMMITTED: number;
-    readonly MS_MANIPULATION_STATE_DRAGGING: number;
-    readonly MS_MANIPULATION_STATE_INERTIA: number;
-    readonly MS_MANIPULATION_STATE_PRESELECT: number;
-    readonly MS_MANIPULATION_STATE_SELECTING: number;
-    readonly MS_MANIPULATION_STATE_STOPPED: number;
-}
-
-interface MSMediaKeyError {
-    readonly code: number;
-    readonly systemCode: number;
-    readonly MS_MEDIA_KEYERR_CLIENT: number;
-    readonly MS_MEDIA_KEYERR_DOMAIN: number;
-    readonly MS_MEDIA_KEYERR_HARDWARECHANGE: number;
-    readonly MS_MEDIA_KEYERR_OUTPUT: number;
-    readonly MS_MEDIA_KEYERR_SERVICE: number;
-    readonly MS_MEDIA_KEYERR_UNKNOWN: number;
-}
-
-declare var MSMediaKeyError: {
-    prototype: MSMediaKeyError;
-    new(): MSMediaKeyError;
-    readonly MS_MEDIA_KEYERR_CLIENT: number;
-    readonly MS_MEDIA_KEYERR_DOMAIN: number;
-    readonly MS_MEDIA_KEYERR_HARDWARECHANGE: number;
-    readonly MS_MEDIA_KEYERR_OUTPUT: number;
-    readonly MS_MEDIA_KEYERR_SERVICE: number;
-    readonly MS_MEDIA_KEYERR_UNKNOWN: number;
-}
-
-interface MSMediaKeyMessageEvent extends Event {
-    readonly destinationURL: string | null;
-    readonly message: Uint8Array;
-}
-
-declare var MSMediaKeyMessageEvent: {
-    prototype: MSMediaKeyMessageEvent;
-    new(): MSMediaKeyMessageEvent;
-}
-
-interface MSMediaKeyNeededEvent extends Event {
-    readonly initData: Uint8Array | null;
-}
-
-declare var MSMediaKeyNeededEvent: {
-    prototype: MSMediaKeyNeededEvent;
-    new(): MSMediaKeyNeededEvent;
-}
-
-interface MSMediaKeySession extends EventTarget {
-    readonly error: MSMediaKeyError | null;
-    readonly keySystem: string;
-    readonly sessionId: string;
-    close(): void;
-    update(key: Uint8Array): void;
-}
-
-declare var MSMediaKeySession: {
-    prototype: MSMediaKeySession;
-    new(): MSMediaKeySession;
-}
-
-interface MSMediaKeys {
-    readonly keySystem: string;
-    createSession(type: string, initData: Uint8Array, cdmData?: Uint8Array): MSMediaKeySession;
-}
-
-declare var MSMediaKeys: {
-    prototype: MSMediaKeys;
-    new(keySystem: string): MSMediaKeys;
-    isTypeSupported(keySystem: string, type?: string): boolean;
-    isTypeSupportedWithFeatures(keySystem: string, type?: string): string;
-}
-
-interface MSPointerEvent extends MouseEvent {
-    readonly currentPoint: any;
-    readonly height: number;
-    readonly hwTimestamp: number;
-    readonly intermediatePoints: any;
-    readonly isPrimary: boolean;
-    readonly pointerId: number;
-    readonly pointerType: any;
-    readonly pressure: number;
-    readonly rotation: number;
-    readonly tiltX: number;
-    readonly tiltY: number;
-    readonly width: number;
-    getCurrentPoint(element: Element): void;
-    getIntermediatePoints(element: Element): void;
-    initPointerEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, ctrlKeyArg: boolean, altKeyArg: boolean, shiftKeyArg: boolean, metaKeyArg: boolean, buttonArg: number, relatedTargetArg: EventTarget, offsetXArg: number, offsetYArg: number, widthArg: number, heightArg: number, pressure: number, rotation: number, tiltX: number, tiltY: number, pointerIdArg: number, pointerType: any, hwTimestampArg: number, isPrimary: boolean): void;
-}
-
-declare var MSPointerEvent: {
-    prototype: MSPointerEvent;
-    new(typeArg: string, eventInitDict?: PointerEventInit): MSPointerEvent;
-}
-
-interface MSRangeCollection {
-    readonly length: number;
-    item(index: number): Range;
-    [index: number]: Range;
-}
-
-declare var MSRangeCollection: {
-    prototype: MSRangeCollection;
-    new(): MSRangeCollection;
-}
-
-interface MSSiteModeEvent extends Event {
-    readonly actionURL: string;
-    readonly buttonID: number;
-}
-
-declare var MSSiteModeEvent: {
-    prototype: MSSiteModeEvent;
-    new(): MSSiteModeEvent;
-}
-
-interface MSStream {
-    readonly type: string;
-    msClose(): void;
-    msDetachStream(): any;
-}
-
-declare var MSStream: {
-    prototype: MSStream;
-    new(): MSStream;
-}
-
-interface MSStreamReader extends EventTarget, MSBaseReader {
-    readonly error: DOMError;
-    readAsArrayBuffer(stream: MSStream, size?: number): void;
-    readAsBinaryString(stream: MSStream, size?: number): void;
-    readAsBlob(stream: MSStream, size?: number): void;
-    readAsDataURL(stream: MSStream, size?: number): void;
-    readAsText(stream: MSStream, encoding?: string, size?: number): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var MSStreamReader: {
-    prototype: MSStreamReader;
-    new(): MSStreamReader;
-}
-
-interface MSWebViewAsyncOperation extends EventTarget {
-    readonly error: DOMError;
-    oncomplete: (this: this, ev: Event) => any;
-    onerror: (this: this, ev: ErrorEvent) => any;
-    readonly readyState: number;
-    readonly result: any;
-    readonly target: MSHTMLWebViewElement;
-    readonly type: number;
-    start(): void;
-    readonly COMPLETED: number;
-    readonly ERROR: number;
-    readonly STARTED: number;
-    readonly TYPE_CAPTURE_PREVIEW_TO_RANDOM_ACCESS_STREAM: number;
-    readonly TYPE_CREATE_DATA_PACKAGE_FROM_SELECTION: number;
-    readonly TYPE_INVOKE_SCRIPT: number;
-    addEventListener(type: "complete", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var MSWebViewAsyncOperation: {
-    prototype: MSWebViewAsyncOperation;
-    new(): MSWebViewAsyncOperation;
-    readonly COMPLETED: number;
-    readonly ERROR: number;
-    readonly STARTED: number;
-    readonly TYPE_CAPTURE_PREVIEW_TO_RANDOM_ACCESS_STREAM: number;
-    readonly TYPE_CREATE_DATA_PACKAGE_FROM_SELECTION: number;
-    readonly TYPE_INVOKE_SCRIPT: number;
-}
-
-interface MSWebViewSettings {
-    isIndexedDBEnabled: boolean;
-    isJavaScriptEnabled: boolean;
-}
-
-declare var MSWebViewSettings: {
-    prototype: MSWebViewSettings;
-    new(): MSWebViewSettings;
-}
-
-interface MediaDeviceInfo {
-    readonly deviceId: string;
-    readonly groupId: string;
-    readonly kind: string;
-    readonly label: string;
-}
-
-declare var MediaDeviceInfo: {
-    prototype: MediaDeviceInfo;
-    new(): MediaDeviceInfo;
-}
-
-interface MediaDevices extends EventTarget {
-    ondevicechange: (this: this, ev: Event) => any;
-    enumerateDevices(): any;
-    getSupportedConstraints(): MediaTrackSupportedConstraints;
-    getUserMedia(constraints: MediaStreamConstraints): PromiseLike<MediaStream>;
-    addEventListener(type: "devicechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var MediaDevices: {
-    prototype: MediaDevices;
-    new(): MediaDevices;
-}
-
-interface MediaElementAudioSourceNode extends AudioNode {
-}
-
-declare var MediaElementAudioSourceNode: {
-    prototype: MediaElementAudioSourceNode;
-    new(): MediaElementAudioSourceNode;
-}
-
-interface MediaEncryptedEvent extends Event {
-    readonly initData: ArrayBuffer | null;
-    readonly initDataType: string;
-}
-
-declare var MediaEncryptedEvent: {
-    prototype: MediaEncryptedEvent;
-    new(type: string, eventInitDict?: MediaEncryptedEventInit): MediaEncryptedEvent;
-}
-
-interface MediaError {
-    readonly code: number;
-    readonly msExtendedCode: number;
-    readonly MEDIA_ERR_ABORTED: number;
-    readonly MEDIA_ERR_DECODE: number;
-    readonly MEDIA_ERR_NETWORK: number;
-    readonly MEDIA_ERR_SRC_NOT_SUPPORTED: number;
-    readonly MS_MEDIA_ERR_ENCRYPTED: number;
-}
-
-declare var MediaError: {
-    prototype: MediaError;
-    new(): MediaError;
-    readonly MEDIA_ERR_ABORTED: number;
-    readonly MEDIA_ERR_DECODE: number;
-    readonly MEDIA_ERR_NETWORK: number;
-    readonly MEDIA_ERR_SRC_NOT_SUPPORTED: number;
-    readonly MS_MEDIA_ERR_ENCRYPTED: number;
-}
-
-interface MediaKeyMessageEvent extends Event {
-    readonly message: ArrayBuffer;
-    readonly messageType: string;
-}
-
-declare var MediaKeyMessageEvent: {
-    prototype: MediaKeyMessageEvent;
-    new(type: string, eventInitDict?: MediaKeyMessageEventInit): MediaKeyMessageEvent;
-}
-
-interface MediaKeySession extends EventTarget {
-    readonly closed: PromiseLike<void>;
-    readonly expiration: number;
-    readonly keyStatuses: MediaKeyStatusMap;
-    readonly sessionId: string;
-    close(): PromiseLike<void>;
-    generateRequest(initDataType: string, initData: any): PromiseLike<void>;
-    load(sessionId: string): PromiseLike<boolean>;
-    remove(): PromiseLike<void>;
-    update(response: any): PromiseLike<void>;
-}
-
-declare var MediaKeySession: {
-    prototype: MediaKeySession;
-    new(): MediaKeySession;
-}
-
-interface MediaKeyStatusMap {
-    readonly size: number;
-    forEach(callback: ForEachCallback): void;
-    get(keyId: any): string;
-    has(keyId: any): boolean;
-}
-
-declare var MediaKeyStatusMap: {
-    prototype: MediaKeyStatusMap;
-    new(): MediaKeyStatusMap;
-}
-
-interface MediaKeySystemAccess {
-    readonly keySystem: string;
-    createMediaKeys(): PromiseLike<MediaKeys>;
-    getConfiguration(): MediaKeySystemConfiguration;
-}
-
-declare var MediaKeySystemAccess: {
-    prototype: MediaKeySystemAccess;
-    new(): MediaKeySystemAccess;
-}
-
-interface MediaKeys {
-    createSession(sessionType?: string): MediaKeySession;
-    setServerCertificate(serverCertificate: any): PromiseLike<void>;
-}
-
-declare var MediaKeys: {
-    prototype: MediaKeys;
-    new(): MediaKeys;
-}
-
-interface MediaList {
-    readonly length: number;
-    mediaText: string;
-    appendMedium(newMedium: string): void;
-    deleteMedium(oldMedium: string): void;
-    item(index: number): string;
-    toString(): string;
-    [index: number]: string;
-}
-
-declare var MediaList: {
-    prototype: MediaList;
-    new(): MediaList;
-}
-
-interface MediaQueryList {
-    readonly matches: boolean;
-    readonly media: string;
-    addListener(listener: MediaQueryListListener): void;
-    removeListener(listener: MediaQueryListListener): void;
-}
-
-declare var MediaQueryList: {
-    prototype: MediaQueryList;
-    new(): MediaQueryList;
-}
-
-interface MediaSource extends EventTarget {
-    readonly activeSourceBuffers: SourceBufferList;
-    duration: number;
-    readonly readyState: string;
-    readonly sourceBuffers: SourceBufferList;
-    addSourceBuffer(type: string): SourceBuffer;
-    endOfStream(error?: number): void;
-    removeSourceBuffer(sourceBuffer: SourceBuffer): void;
-}
-
-declare var MediaSource: {
-    prototype: MediaSource;
-    new(): MediaSource;
-    isTypeSupported(type: string): boolean;
-}
-
-interface MediaStream extends EventTarget {
-    readonly active: boolean;
-    readonly id: string;
-    onactive: (this: this, ev: Event) => any;
-    onaddtrack: (this: this, ev: TrackEvent) => any;
-    oninactive: (this: this, ev: Event) => any;
-    onremovetrack: (this: this, ev: TrackEvent) => any;
-    addTrack(track: MediaStreamTrack): void;
-    clone(): MediaStream;
-    getAudioTracks(): MediaStreamTrack[];
-    getTrackById(trackId: string): MediaStreamTrack | null;
-    getTracks(): MediaStreamTrack[];
-    getVideoTracks(): MediaStreamTrack[];
-    removeTrack(track: MediaStreamTrack): void;
-    stop(): void;
-    addEventListener(type: "active", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "addtrack", listener: (this: this, ev: TrackEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "inactive", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "removetrack", listener: (this: this, ev: TrackEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var MediaStream: {
-    prototype: MediaStream;
-    new(streamOrTracks?: MediaStream | MediaStreamTrack[]): MediaStream;
-}
-
-interface MediaStreamAudioSourceNode extends AudioNode {
-}
-
-declare var MediaStreamAudioSourceNode: {
-    prototype: MediaStreamAudioSourceNode;
-    new(): MediaStreamAudioSourceNode;
-}
-
-interface MediaStreamError {
-    readonly constraintName: string | null;
-    readonly message: string | null;
-    readonly name: string;
-}
-
-declare var MediaStreamError: {
-    prototype: MediaStreamError;
-    new(): MediaStreamError;
-}
-
-interface MediaStreamErrorEvent extends Event {
-    readonly error: MediaStreamError | null;
-}
-
-declare var MediaStreamErrorEvent: {
-    prototype: MediaStreamErrorEvent;
-    new(type: string, eventInitDict?: MediaStreamErrorEventInit): MediaStreamErrorEvent;
-}
-
-interface MediaStreamTrack extends EventTarget {
-    enabled: boolean;
-    readonly id: string;
-    readonly kind: string;
-    readonly label: string;
-    readonly muted: boolean;
-    onended: (this: this, ev: MediaStreamErrorEvent) => any;
-    onmute: (this: this, ev: Event) => any;
-    onoverconstrained: (this: this, ev: MediaStreamErrorEvent) => any;
-    onunmute: (this: this, ev: Event) => any;
-    readonly readonly: boolean;
-    readonly readyState: string;
-    readonly remote: boolean;
-    applyConstraints(constraints: MediaTrackConstraints): PromiseLike<void>;
-    clone(): MediaStreamTrack;
-    getCapabilities(): MediaTrackCapabilities;
-    getConstraints(): MediaTrackConstraints;
-    getSettings(): MediaTrackSettings;
-    stop(): void;
-    addEventListener(type: "ended", listener: (this: this, ev: MediaStreamErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mute", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "overconstrained", listener: (this: this, ev: MediaStreamErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "unmute", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var MediaStreamTrack: {
-    prototype: MediaStreamTrack;
-    new(): MediaStreamTrack;
-}
-
-interface MediaStreamTrackEvent extends Event {
-    readonly track: MediaStreamTrack;
-}
-
-declare var MediaStreamTrackEvent: {
-    prototype: MediaStreamTrackEvent;
-    new(type: string, eventInitDict?: MediaStreamTrackEventInit): MediaStreamTrackEvent;
-}
-
-interface MessageChannel {
-    readonly port1: MessagePort;
-    readonly port2: MessagePort;
-}
-
-declare var MessageChannel: {
-    prototype: MessageChannel;
-    new(): MessageChannel;
-}
-
-interface MessageEvent extends Event {
-    readonly data: any;
-    readonly origin: string;
-    readonly ports: any;
-    readonly source: Window;
-    initMessageEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, dataArg: any, originArg: string, lastEventIdArg: string, sourceArg: Window): void;
-}
-
-declare var MessageEvent: {
-    prototype: MessageEvent;
-    new(type: string, eventInitDict?: MessageEventInit): MessageEvent;
-}
-
-interface MessagePort extends EventTarget {
-    onmessage: (this: this, ev: MessageEvent) => any;
-    close(): void;
-    postMessage(message?: any, ports?: any): void;
-    start(): void;
-    addEventListener(type: "message", listener: (this: this, ev: MessageEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var MessagePort: {
-    prototype: MessagePort;
-    new(): MessagePort;
-}
-
-interface MimeType {
-    readonly description: string;
-    readonly enabledPlugin: Plugin;
-    readonly suffixes: string;
-    readonly type: string;
-}
-
-declare var MimeType: {
-    prototype: MimeType;
-    new(): MimeType;
-}
-
-interface MimeTypeArray {
-    readonly length: number;
-    item(index: number): Plugin;
-    namedItem(type: string): Plugin;
-    [index: number]: Plugin;
-}
-
-declare var MimeTypeArray: {
-    prototype: MimeTypeArray;
-    new(): MimeTypeArray;
-}
-
-interface MouseEvent extends UIEvent {
-    readonly altKey: boolean;
-    readonly button: number;
-    readonly buttons: number;
-    readonly clientX: number;
-    readonly clientY: number;
-    readonly ctrlKey: boolean;
-    readonly fromElement: Element;
-    readonly layerX: number;
-    readonly layerY: number;
-    readonly metaKey: boolean;
-    readonly movementX: number;
-    readonly movementY: number;
-    readonly offsetX: number;
-    readonly offsetY: number;
-    readonly pageX: number;
-    readonly pageY: number;
-    readonly relatedTarget: EventTarget;
-    readonly screenX: number;
-    readonly screenY: number;
-    readonly shiftKey: boolean;
-    readonly toElement: Element;
-    readonly which: number;
-    readonly x: number;
-    readonly y: number;
-    getModifierState(keyArg: string): boolean;
-    initMouseEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, ctrlKeyArg: boolean, altKeyArg: boolean, shiftKeyArg: boolean, metaKeyArg: boolean, buttonArg: number, relatedTargetArg: EventTarget): void;
-}
-
-declare var MouseEvent: {
-    prototype: MouseEvent;
-    new(typeArg: string, eventInitDict?: MouseEventInit): MouseEvent;
-}
-
-interface MutationEvent extends Event {
-    readonly attrChange: number;
-    readonly attrName: string;
-    readonly newValue: string;
-    readonly prevValue: string;
-    readonly relatedNode: Node;
-    initMutationEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, relatedNodeArg: Node, prevValueArg: string, newValueArg: string, attrNameArg: string, attrChangeArg: number): void;
-    readonly ADDITION: number;
-    readonly MODIFICATION: number;
-    readonly REMOVAL: number;
-}
-
-declare var MutationEvent: {
-    prototype: MutationEvent;
-    new(): MutationEvent;
-    readonly ADDITION: number;
-    readonly MODIFICATION: number;
-    readonly REMOVAL: number;
-}
-
-interface MutationObserver {
-    disconnect(): void;
-    observe(target: Node, options: MutationObserverInit): void;
-    takeRecords(): MutationRecord[];
-}
-
-declare var MutationObserver: {
-    prototype: MutationObserver;
-    new(callback: MutationCallback): MutationObserver;
-}
-
-interface MutationRecord {
-    readonly addedNodes: NodeList;
-    readonly attributeName: string | null;
-    readonly attributeNamespace: string | null;
-    readonly nextSibling: Node | null;
-    readonly oldValue: string | null;
-    readonly previousSibling: Node | null;
-    readonly removedNodes: NodeList;
-    readonly target: Node;
-    readonly type: string;
-}
-
-declare var MutationRecord: {
-    prototype: MutationRecord;
-    new(): MutationRecord;
-}
-
-interface NamedNodeMap {
-    readonly length: number;
-    getNamedItem(name: string): Attr;
-    getNamedItemNS(namespaceURI: string | null, localName: string | null): Attr;
-    item(index: number): Attr;
-    removeNamedItem(name: string): Attr;
-    removeNamedItemNS(namespaceURI: string | null, localName: string | null): Attr;
-    setNamedItem(arg: Attr): Attr;
-    setNamedItemNS(arg: Attr): Attr;
-    [index: number]: Attr;
-}
-
-declare var NamedNodeMap: {
-    prototype: NamedNodeMap;
-    new(): NamedNodeMap;
-}
-
-interface NavigationCompletedEvent extends NavigationEvent {
-    readonly isSuccess: boolean;
-    readonly webErrorStatus: number;
-}
-
-declare var NavigationCompletedEvent: {
-    prototype: NavigationCompletedEvent;
-    new(): NavigationCompletedEvent;
-}
-
-interface NavigationEvent extends Event {
-    readonly uri: string;
-}
-
-declare var NavigationEvent: {
-    prototype: NavigationEvent;
-    new(): NavigationEvent;
-}
-
-interface NavigationEventWithReferrer extends NavigationEvent {
-    readonly referer: string;
-}
-
-declare var NavigationEventWithReferrer: {
-    prototype: NavigationEventWithReferrer;
-    new(): NavigationEventWithReferrer;
-}
-
-interface Navigator extends Object, NavigatorID, NavigatorOnLine, NavigatorContentUtils, NavigatorStorageUtils, NavigatorGeolocation, MSNavigatorDoNotTrack, MSFileSaver, NavigatorUserMedia {
-    readonly appCodeName: string;
-    readonly cookieEnabled: boolean;
-    readonly language: string;
-    readonly maxTouchPoints: number;
-    readonly mimeTypes: MimeTypeArray;
-    readonly msManipulationViewsEnabled: boolean;
-    readonly msMaxTouchPoints: number;
-    readonly msPointerEnabled: boolean;
-    readonly plugins: PluginArray;
-    readonly pointerEnabled: boolean;
-    readonly webdriver: boolean;
-    getGamepads(): Gamepad[];
-    javaEnabled(): boolean;
-    msLaunchUri(uri: string, successCallback?: MSLaunchUriCallback, noHandlerCallback?: MSLaunchUriCallback): void;
-    requestMediaKeySystemAccess(keySystem: string, supportedConfigurations: MediaKeySystemConfiguration[]): PromiseLike<MediaKeySystemAccess>;
-    vibrate(pattern: number | number[]): boolean;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var Navigator: {
-    prototype: Navigator;
-    new(): Navigator;
-}
-
-interface Node extends EventTarget {
-    readonly attributes: NamedNodeMap;
-    readonly baseURI: string | null;
-    readonly childNodes: NodeList;
-    readonly firstChild: Node;
-    readonly lastChild: Node;
-    readonly localName: string | null;
-    readonly namespaceURI: string | null;
-    readonly nextSibling: Node;
-    readonly nodeName: string;
-    readonly nodeType: number;
-    nodeValue: string | null;
-    readonly ownerDocument: Document;
-    readonly parentElement: HTMLElement;
-    readonly parentNode: Node;
-    readonly previousSibling: Node;
-    textContent: string | null;
-    appendChild(newChild: Node): Node;
-    cloneNode(deep?: boolean): Node;
-    compareDocumentPosition(other: Node): number;
-    contains(child: Node): boolean;
-    hasAttributes(): boolean;
-    hasChildNodes(): boolean;
-    insertBefore(newChild: Node, refChild: Node | null): Node;
-    isDefaultNamespace(namespaceURI: string | null): boolean;
-    isEqualNode(arg: Node): boolean;
-    isSameNode(other: Node): boolean;
-    lookupNamespaceURI(prefix: string | null): string | null;
-    lookupPrefix(namespaceURI: string | null): string | null;
-    normalize(): void;
-    removeChild(oldChild: Node): Node;
-    replaceChild(newChild: Node, oldChild: Node): Node;
-    readonly ATTRIBUTE_NODE: number;
-    readonly CDATA_SECTION_NODE: number;
-    readonly COMMENT_NODE: number;
-    readonly DOCUMENT_FRAGMENT_NODE: number;
-    readonly DOCUMENT_NODE: number;
-    readonly DOCUMENT_POSITION_CONTAINED_BY: number;
-    readonly DOCUMENT_POSITION_CONTAINS: number;
-    readonly DOCUMENT_POSITION_DISCONNECTED: number;
-    readonly DOCUMENT_POSITION_FOLLOWING: number;
-    readonly DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC: number;
-    readonly DOCUMENT_POSITION_PRECEDING: number;
-    readonly DOCUMENT_TYPE_NODE: number;
-    readonly ELEMENT_NODE: number;
-    readonly ENTITY_NODE: number;
-    readonly ENTITY_REFERENCE_NODE: number;
-    readonly NOTATION_NODE: number;
-    readonly PROCESSING_INSTRUCTION_NODE: number;
-    readonly TEXT_NODE: number;
-}
-
-declare var Node: {
-    prototype: Node;
-    new(): Node;
-    readonly ATTRIBUTE_NODE: number;
-    readonly CDATA_SECTION_NODE: number;
-    readonly COMMENT_NODE: number;
-    readonly DOCUMENT_FRAGMENT_NODE: number;
-    readonly DOCUMENT_NODE: number;
-    readonly DOCUMENT_POSITION_CONTAINED_BY: number;
-    readonly DOCUMENT_POSITION_CONTAINS: number;
-    readonly DOCUMENT_POSITION_DISCONNECTED: number;
-    readonly DOCUMENT_POSITION_FOLLOWING: number;
-    readonly DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC: number;
-    readonly DOCUMENT_POSITION_PRECEDING: number;
-    readonly DOCUMENT_TYPE_NODE: number;
-    readonly ELEMENT_NODE: number;
-    readonly ENTITY_NODE: number;
-    readonly ENTITY_REFERENCE_NODE: number;
-    readonly NOTATION_NODE: number;
-    readonly PROCESSING_INSTRUCTION_NODE: number;
-    readonly TEXT_NODE: number;
-}
-
-interface NodeFilter {
-    acceptNode(n: Node): number;
-}
-
-declare var NodeFilter: {
-    readonly FILTER_ACCEPT: number;
-    readonly FILTER_REJECT: number;
-    readonly FILTER_SKIP: number;
-    readonly SHOW_ALL: number;
-    readonly SHOW_ATTRIBUTE: number;
-    readonly SHOW_CDATA_SECTION: number;
-    readonly SHOW_COMMENT: number;
-    readonly SHOW_DOCUMENT: number;
-    readonly SHOW_DOCUMENT_FRAGMENT: number;
-    readonly SHOW_DOCUMENT_TYPE: number;
-    readonly SHOW_ELEMENT: number;
-    readonly SHOW_ENTITY: number;
-    readonly SHOW_ENTITY_REFERENCE: number;
-    readonly SHOW_NOTATION: number;
-    readonly SHOW_PROCESSING_INSTRUCTION: number;
-    readonly SHOW_TEXT: number;
-}
-
-interface NodeIterator {
-    readonly expandEntityReferences: boolean;
-    readonly filter: NodeFilter;
-    readonly root: Node;
-    readonly whatToShow: number;
-    detach(): void;
-    nextNode(): Node;
-    previousNode(): Node;
-}
-
-declare var NodeIterator: {
-    prototype: NodeIterator;
-    new(): NodeIterator;
-}
-
-interface NodeList {
-    readonly length: number;
-    item(index: number): Node;
-    [index: number]: Node;
-}
-
-declare var NodeList: {
-    prototype: NodeList;
-    new(): NodeList;
-}
-
-interface OES_element_index_uint {
-}
-
-declare var OES_element_index_uint: {
-    prototype: OES_element_index_uint;
-    new(): OES_element_index_uint;
-}
-
-interface OES_standard_derivatives {
-    readonly FRAGMENT_SHADER_DERIVATIVE_HINT_OES: number;
-}
-
-declare var OES_standard_derivatives: {
-    prototype: OES_standard_derivatives;
-    new(): OES_standard_derivatives;
-    readonly FRAGMENT_SHADER_DERIVATIVE_HINT_OES: number;
-}
-
-interface OES_texture_float {
-}
-
-declare var OES_texture_float: {
-    prototype: OES_texture_float;
-    new(): OES_texture_float;
-}
-
-interface OES_texture_float_linear {
-}
-
-declare var OES_texture_float_linear: {
-    prototype: OES_texture_float_linear;
-    new(): OES_texture_float_linear;
-}
-
-interface OfflineAudioCompletionEvent extends Event {
-    readonly renderedBuffer: AudioBuffer;
-}
-
-declare var OfflineAudioCompletionEvent: {
-    prototype: OfflineAudioCompletionEvent;
-    new(): OfflineAudioCompletionEvent;
-}
-
-interface OfflineAudioContext extends AudioContext {
-    oncomplete: (this: this, ev: Event) => any;
-    startRendering(): PromiseLike<AudioBuffer>;
-    addEventListener(type: "complete", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var OfflineAudioContext: {
-    prototype: OfflineAudioContext;
-    new(numberOfChannels: number, length: number, sampleRate: number): OfflineAudioContext;
-}
-
-interface OscillatorNode extends AudioNode {
-    readonly detune: AudioParam;
-    readonly frequency: AudioParam;
-    onended: (this: this, ev: MediaStreamErrorEvent) => any;
-    type: string;
-    setPeriodicWave(periodicWave: PeriodicWave): void;
-    start(when?: number): void;
-    stop(when?: number): void;
-    addEventListener(type: "ended", listener: (this: this, ev: MediaStreamErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var OscillatorNode: {
-    prototype: OscillatorNode;
-    new(): OscillatorNode;
-}
-
-interface OverflowEvent extends UIEvent {
-    readonly horizontalOverflow: boolean;
-    readonly orient: number;
-    readonly verticalOverflow: boolean;
-    readonly BOTH: number;
-    readonly HORIZONTAL: number;
-    readonly VERTICAL: number;
-}
-
-declare var OverflowEvent: {
-    prototype: OverflowEvent;
-    new(): OverflowEvent;
-    readonly BOTH: number;
-    readonly HORIZONTAL: number;
-    readonly VERTICAL: number;
-}
-
-interface PageTransitionEvent extends Event {
-    readonly persisted: boolean;
-}
-
-declare var PageTransitionEvent: {
-    prototype: PageTransitionEvent;
-    new(): PageTransitionEvent;
-}
-
-interface PannerNode extends AudioNode {
-    coneInnerAngle: number;
-    coneOuterAngle: number;
-    coneOuterGain: number;
-    distanceModel: string;
-    maxDistance: number;
-    panningModel: string;
-    refDistance: number;
-    rolloffFactor: number;
-    setOrientation(x: number, y: number, z: number): void;
-    setPosition(x: number, y: number, z: number): void;
-    setVelocity(x: number, y: number, z: number): void;
-}
-
-declare var PannerNode: {
-    prototype: PannerNode;
-    new(): PannerNode;
-}
-
-interface PerfWidgetExternal {
-    readonly activeNetworkRequestCount: number;
-    readonly averageFrameTime: number;
-    readonly averagePaintTime: number;
-    readonly extraInformationEnabled: boolean;
-    readonly independentRenderingEnabled: boolean;
-    readonly irDisablingContentString: string;
-    readonly irStatusAvailable: boolean;
-    readonly maxCpuSpeed: number;
-    readonly paintRequestsPerSecond: number;
-    readonly performanceCounter: number;
-    readonly performanceCounterFrequency: number;
-    addEventListener(eventType: string, callback: Function): void;
-    getMemoryUsage(): number;
-    getProcessCpuUsage(): number;
-    getRecentCpuUsage(last: number | null): any;
-    getRecentFrames(last: number | null): any;
-    getRecentMemoryUsage(last: number | null): any;
-    getRecentPaintRequests(last: number | null): any;
-    removeEventListener(eventType: string, callback: Function): void;
-    repositionWindow(x: number, y: number): void;
-    resizeWindow(width: number, height: number): void;
-}
-
-declare var PerfWidgetExternal: {
-    prototype: PerfWidgetExternal;
-    new(): PerfWidgetExternal;
-}
-
-interface Performance {
-    readonly navigation: PerformanceNavigation;
-    readonly timing: PerformanceTiming;
-    clearMarks(markName?: string): void;
-    clearMeasures(measureName?: string): void;
-    clearResourceTimings(): void;
-    getEntries(): any;
-    getEntriesByName(name: string, entryType?: string): any;
-    getEntriesByType(entryType: string): any;
-    getMarks(markName?: string): any;
-    getMeasures(measureName?: string): any;
-    mark(markName: string): void;
-    measure(measureName: string, startMarkName?: string, endMarkName?: string): void;
-    now(): number;
-    setResourceTimingBufferSize(maxSize: number): void;
-    toJSON(): any;
-}
-
-declare var Performance: {
-    prototype: Performance;
-    new(): Performance;
-}
-
-interface PerformanceEntry {
-    readonly duration: number;
-    readonly entryType: string;
-    readonly name: string;
-    readonly startTime: number;
-}
-
-declare var PerformanceEntry: {
-    prototype: PerformanceEntry;
-    new(): PerformanceEntry;
-}
-
-interface PerformanceMark extends PerformanceEntry {
-}
-
-declare var PerformanceMark: {
-    prototype: PerformanceMark;
-    new(): PerformanceMark;
-}
-
-interface PerformanceMeasure extends PerformanceEntry {
-}
-
-declare var PerformanceMeasure: {
-    prototype: PerformanceMeasure;
-    new(): PerformanceMeasure;
-}
-
-interface PerformanceNavigation {
-    readonly redirectCount: number;
-    readonly type: number;
-    toJSON(): any;
-    readonly TYPE_BACK_FORWARD: number;
-    readonly TYPE_NAVIGATE: number;
-    readonly TYPE_RELOAD: number;
-    readonly TYPE_RESERVED: number;
-}
-
-declare var PerformanceNavigation: {
-    prototype: PerformanceNavigation;
-    new(): PerformanceNavigation;
-    readonly TYPE_BACK_FORWARD: number;
-    readonly TYPE_NAVIGATE: number;
-    readonly TYPE_RELOAD: number;
-    readonly TYPE_RESERVED: number;
-}
-
-interface PerformanceNavigationTiming extends PerformanceEntry {
-    readonly connectEnd: number;
-    readonly connectStart: number;
-    readonly domComplete: number;
-    readonly domContentLoadedEventEnd: number;
-    readonly domContentLoadedEventStart: number;
-    readonly domInteractive: number;
-    readonly domLoading: number;
-    readonly domainLookupEnd: number;
-    readonly domainLookupStart: number;
-    readonly fetchStart: number;
-    readonly loadEventEnd: number;
-    readonly loadEventStart: number;
-    readonly navigationStart: number;
-    readonly redirectCount: number;
-    readonly redirectEnd: number;
-    readonly redirectStart: number;
-    readonly requestStart: number;
-    readonly responseEnd: number;
-    readonly responseStart: number;
-    readonly type: string;
-    readonly unloadEventEnd: number;
-    readonly unloadEventStart: number;
-}
-
-declare var PerformanceNavigationTiming: {
-    prototype: PerformanceNavigationTiming;
-    new(): PerformanceNavigationTiming;
-}
-
-interface PerformanceResourceTiming extends PerformanceEntry {
-    readonly connectEnd: number;
-    readonly connectStart: number;
-    readonly domainLookupEnd: number;
-    readonly domainLookupStart: number;
-    readonly fetchStart: number;
-    readonly initiatorType: string;
-    readonly redirectEnd: number;
-    readonly redirectStart: number;
-    readonly requestStart: number;
-    readonly responseEnd: number;
-    readonly responseStart: number;
-}
-
-declare var PerformanceResourceTiming: {
-    prototype: PerformanceResourceTiming;
-    new(): PerformanceResourceTiming;
-}
-
-interface PerformanceTiming {
-    readonly connectEnd: number;
-    readonly connectStart: number;
-    readonly domComplete: number;
-    readonly domContentLoadedEventEnd: number;
-    readonly domContentLoadedEventStart: number;
-    readonly domInteractive: number;
-    readonly domLoading: number;
-    readonly domainLookupEnd: number;
-    readonly domainLookupStart: number;
-    readonly fetchStart: number;
-    readonly loadEventEnd: number;
-    readonly loadEventStart: number;
-    readonly msFirstPaint: number;
-    readonly navigationStart: number;
-    readonly redirectEnd: number;
-    readonly redirectStart: number;
-    readonly requestStart: number;
-    readonly responseEnd: number;
-    readonly responseStart: number;
-    readonly unloadEventEnd: number;
-    readonly unloadEventStart: number;
-    readonly secureConnectionStart: number;
-    toJSON(): any;
-}
-
-declare var PerformanceTiming: {
-    prototype: PerformanceTiming;
-    new(): PerformanceTiming;
-}
-
-interface PeriodicWave {
-}
-
-declare var PeriodicWave: {
-    prototype: PeriodicWave;
-    new(): PeriodicWave;
-}
-
-interface PermissionRequest extends DeferredPermissionRequest {
-    readonly state: string;
-    defer(): void;
-}
-
-declare var PermissionRequest: {
-    prototype: PermissionRequest;
-    new(): PermissionRequest;
-}
-
-interface PermissionRequestedEvent extends Event {
-    readonly permissionRequest: PermissionRequest;
-}
-
-declare var PermissionRequestedEvent: {
-    prototype: PermissionRequestedEvent;
-    new(): PermissionRequestedEvent;
-}
-
-interface Plugin {
-    readonly description: string;
-    readonly filename: string;
-    readonly length: number;
-    readonly name: string;
-    readonly version: string;
-    item(index: number): MimeType;
-    namedItem(type: string): MimeType;
-    [index: number]: MimeType;
-}
-
-declare var Plugin: {
-    prototype: Plugin;
-    new(): Plugin;
-}
-
-interface PluginArray {
-    readonly length: number;
-    item(index: number): Plugin;
-    namedItem(name: string): Plugin;
-    refresh(reload?: boolean): void;
-    [index: number]: Plugin;
-}
-
-declare var PluginArray: {
-    prototype: PluginArray;
-    new(): PluginArray;
-}
-
-interface PointerEvent extends MouseEvent {
-    readonly currentPoint: any;
-    readonly height: number;
-    readonly hwTimestamp: number;
-    readonly intermediatePoints: any;
-    readonly isPrimary: boolean;
-    readonly pointerId: number;
-    readonly pointerType: any;
-    readonly pressure: number;
-    readonly rotation: number;
-    readonly tiltX: number;
-    readonly tiltY: number;
-    readonly width: number;
-    getCurrentPoint(element: Element): void;
-    getIntermediatePoints(element: Element): void;
-    initPointerEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, ctrlKeyArg: boolean, altKeyArg: boolean, shiftKeyArg: boolean, metaKeyArg: boolean, buttonArg: number, relatedTargetArg: EventTarget, offsetXArg: number, offsetYArg: number, widthArg: number, heightArg: number, pressure: number, rotation: number, tiltX: number, tiltY: number, pointerIdArg: number, pointerType: any, hwTimestampArg: number, isPrimary: boolean): void;
-}
-
-declare var PointerEvent: {
-    prototype: PointerEvent;
-    new(typeArg: string, eventInitDict?: PointerEventInit): PointerEvent;
-}
-
-interface PopStateEvent extends Event {
-    readonly state: any;
-    initPopStateEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, stateArg: any): void;
-}
-
-declare var PopStateEvent: {
-    prototype: PopStateEvent;
-    new(): PopStateEvent;
-}
-
-interface Position {
-    readonly coords: Coordinates;
-    readonly timestamp: number;
-}
-
-declare var Position: {
-    prototype: Position;
-    new(): Position;
-}
-
-interface PositionError {
-    readonly code: number;
-    readonly message: string;
-    toString(): string;
-    readonly PERMISSION_DENIED: number;
-    readonly POSITION_UNAVAILABLE: number;
-    readonly TIMEOUT: number;
-}
-
-declare var PositionError: {
-    prototype: PositionError;
-    new(): PositionError;
-    readonly PERMISSION_DENIED: number;
-    readonly POSITION_UNAVAILABLE: number;
-    readonly TIMEOUT: number;
-}
-
-interface ProcessingInstruction extends CharacterData {
-    readonly target: string;
-}
-
-declare var ProcessingInstruction: {
-    prototype: ProcessingInstruction;
-    new(): ProcessingInstruction;
-}
-
-interface ProgressEvent extends Event {
-    readonly lengthComputable: boolean;
-    readonly loaded: number;
-    readonly total: number;
-    initProgressEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, lengthComputableArg: boolean, loadedArg: number, totalArg: number): void;
-}
-
-declare var ProgressEvent: {
-    prototype: ProgressEvent;
-    new(type: string, eventInitDict?: ProgressEventInit): ProgressEvent;
-}
-
-interface RTCDTMFToneChangeEvent extends Event {
-    readonly tone: string;
-}
-
-declare var RTCDTMFToneChangeEvent: {
-    prototype: RTCDTMFToneChangeEvent;
-    new(type: string, eventInitDict: RTCDTMFToneChangeEventInit): RTCDTMFToneChangeEvent;
-}
-
-interface RTCDtlsTransport extends RTCStatsProvider {
-    ondtlsstatechange: ((this: this, ev: RTCDtlsTransportStateChangedEvent) => any) | null;
-    onerror: ((this: this, ev: ErrorEvent) => any) | null;
-    readonly state: string;
-    readonly transport: RTCIceTransport;
-    getLocalParameters(): RTCDtlsParameters;
-    getRemoteCertificates(): ArrayBuffer[];
-    getRemoteParameters(): RTCDtlsParameters | null;
-    start(remoteParameters: RTCDtlsParameters): void;
-    stop(): void;
-    addEventListener(type: "dtlsstatechange", listener: (this: this, ev: RTCDtlsTransportStateChangedEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var RTCDtlsTransport: {
-    prototype: RTCDtlsTransport;
-    new(transport: RTCIceTransport): RTCDtlsTransport;
-}
-
-interface RTCDtlsTransportStateChangedEvent extends Event {
-    readonly state: string;
-}
-
-declare var RTCDtlsTransportStateChangedEvent: {
-    prototype: RTCDtlsTransportStateChangedEvent;
-    new(): RTCDtlsTransportStateChangedEvent;
-}
-
-interface RTCDtmfSender extends EventTarget {
-    readonly canInsertDTMF: boolean;
-    readonly duration: number;
-    readonly interToneGap: number;
-    ontonechange: (this: this, ev: RTCDTMFToneChangeEvent) => any;
-    readonly sender: RTCRtpSender;
-    readonly toneBuffer: string;
-    insertDTMF(tones: string, duration?: number, interToneGap?: number): void;
-    addEventListener(type: "tonechange", listener: (this: this, ev: RTCDTMFToneChangeEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var RTCDtmfSender: {
-    prototype: RTCDtmfSender;
-    new(sender: RTCRtpSender): RTCDtmfSender;
-}
-
-interface RTCIceCandidatePairChangedEvent extends Event {
-    readonly pair: RTCIceCandidatePair;
-}
-
-declare var RTCIceCandidatePairChangedEvent: {
-    prototype: RTCIceCandidatePairChangedEvent;
-    new(): RTCIceCandidatePairChangedEvent;
-}
-
-interface RTCIceGatherer extends RTCStatsProvider {
-    readonly component: string;
-    onerror: ((this: this, ev: ErrorEvent) => any) | null;
-    onlocalcandidate: ((this: this, ev: RTCIceGathererEvent) => any) | null;
-    createAssociatedGatherer(): RTCIceGatherer;
-    getLocalCandidates(): RTCIceCandidate[];
-    getLocalParameters(): RTCIceParameters;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "localcandidate", listener: (this: this, ev: RTCIceGathererEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var RTCIceGatherer: {
-    prototype: RTCIceGatherer;
-    new(options: RTCIceGatherOptions): RTCIceGatherer;
-}
-
-interface RTCIceGathererEvent extends Event {
-    readonly candidate: RTCIceCandidate | RTCIceCandidateComplete;
-}
-
-declare var RTCIceGathererEvent: {
-    prototype: RTCIceGathererEvent;
-    new(): RTCIceGathererEvent;
-}
-
-interface RTCIceTransport extends RTCStatsProvider {
-    readonly component: string;
-    readonly iceGatherer: RTCIceGatherer | null;
-    oncandidatepairchange: ((this: this, ev: RTCIceCandidatePairChangedEvent) => any) | null;
-    onicestatechange: ((this: this, ev: RTCIceTransportStateChangedEvent) => any) | null;
-    readonly role: string;
-    readonly state: string;
-    addRemoteCandidate(remoteCandidate: RTCIceCandidate | RTCIceCandidateComplete): void;
-    createAssociatedTransport(): RTCIceTransport;
-    getNominatedCandidatePair(): RTCIceCandidatePair | null;
-    getRemoteCandidates(): RTCIceCandidate[];
-    getRemoteParameters(): RTCIceParameters | null;
-    setRemoteCandidates(remoteCandidates: RTCIceCandidate[]): void;
-    start(gatherer: RTCIceGatherer, remoteParameters: RTCIceParameters, role?: string): void;
-    stop(): void;
-    addEventListener(type: "candidatepairchange", listener: (this: this, ev: RTCIceCandidatePairChangedEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "icestatechange", listener: (this: this, ev: RTCIceTransportStateChangedEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var RTCIceTransport: {
-    prototype: RTCIceTransport;
-    new(): RTCIceTransport;
-}
-
-interface RTCIceTransportStateChangedEvent extends Event {
-    readonly state: string;
-}
-
-declare var RTCIceTransportStateChangedEvent: {
-    prototype: RTCIceTransportStateChangedEvent;
-    new(): RTCIceTransportStateChangedEvent;
-}
-
-interface RTCRtpReceiver extends RTCStatsProvider {
-    onerror: ((this: this, ev: ErrorEvent) => any) | null;
-    readonly rtcpTransport: RTCDtlsTransport;
-    readonly track: MediaStreamTrack | null;
-    readonly transport: RTCDtlsTransport | RTCSrtpSdesTransport;
-    getContributingSources(): RTCRtpContributingSource[];
-    receive(parameters: RTCRtpParameters): void;
-    requestSendCSRC(csrc: number): void;
-    setTransport(transport: RTCDtlsTransport | RTCSrtpSdesTransport, rtcpTransport?: RTCDtlsTransport): void;
-    stop(): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var RTCRtpReceiver: {
-    prototype: RTCRtpReceiver;
-    new(transport: RTCDtlsTransport | RTCSrtpSdesTransport, kind: string, rtcpTransport?: RTCDtlsTransport): RTCRtpReceiver;
-    getCapabilities(kind?: string): RTCRtpCapabilities;
-}
-
-interface RTCRtpSender extends RTCStatsProvider {
-    onerror: ((this: this, ev: ErrorEvent) => any) | null;
-    onssrcconflict: ((this: this, ev: RTCSsrcConflictEvent) => any) | null;
-    readonly rtcpTransport: RTCDtlsTransport;
-    readonly track: MediaStreamTrack;
-    readonly transport: RTCDtlsTransport | RTCSrtpSdesTransport;
-    send(parameters: RTCRtpParameters): void;
-    setTrack(track: MediaStreamTrack): void;
-    setTransport(transport: RTCDtlsTransport | RTCSrtpSdesTransport, rtcpTransport?: RTCDtlsTransport): void;
-    stop(): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ssrcconflict", listener: (this: this, ev: RTCSsrcConflictEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var RTCRtpSender: {
-    prototype: RTCRtpSender;
-    new(track: MediaStreamTrack, transport: RTCDtlsTransport | RTCSrtpSdesTransport, rtcpTransport?: RTCDtlsTransport): RTCRtpSender;
-    getCapabilities(kind?: string): RTCRtpCapabilities;
-}
-
-interface RTCSrtpSdesTransport extends EventTarget {
-    onerror: ((this: this, ev: ErrorEvent) => any) | null;
-    readonly transport: RTCIceTransport;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var RTCSrtpSdesTransport: {
-    prototype: RTCSrtpSdesTransport;
-    new(transport: RTCIceTransport, encryptParameters: RTCSrtpSdesParameters, decryptParameters: RTCSrtpSdesParameters): RTCSrtpSdesTransport;
-    getLocalParameters(): RTCSrtpSdesParameters[];
-}
-
-interface RTCSsrcConflictEvent extends Event {
-    readonly ssrc: number;
-}
-
-declare var RTCSsrcConflictEvent: {
-    prototype: RTCSsrcConflictEvent;
-    new(): RTCSsrcConflictEvent;
-}
-
-interface RTCStatsProvider extends EventTarget {
-    getStats(): PromiseLike<RTCStatsReport>;
-    msGetStats(): PromiseLike<RTCStatsReport>;
-}
-
-declare var RTCStatsProvider: {
-    prototype: RTCStatsProvider;
-    new(): RTCStatsProvider;
-}
-
-interface Range {
-    readonly collapsed: boolean;
-    readonly commonAncestorContainer: Node;
-    readonly endContainer: Node;
-    readonly endOffset: number;
-    readonly startContainer: Node;
-    readonly startOffset: number;
-    cloneContents(): DocumentFragment;
-    cloneRange(): Range;
-    collapse(toStart: boolean): void;
-    compareBoundaryPoints(how: number, sourceRange: Range): number;
-    createContextualFragment(fragment: string): DocumentFragment;
-    deleteContents(): void;
-    detach(): void;
-    expand(Unit: string): boolean;
-    extractContents(): DocumentFragment;
-    getBoundingClientRect(): ClientRect;
-    getClientRects(): ClientRectList;
-    insertNode(newNode: Node): void;
-    selectNode(refNode: Node): void;
-    selectNodeContents(refNode: Node): void;
-    setEnd(refNode: Node, offset: number): void;
-    setEndAfter(refNode: Node): void;
-    setEndBefore(refNode: Node): void;
-    setStart(refNode: Node, offset: number): void;
-    setStartAfter(refNode: Node): void;
-    setStartBefore(refNode: Node): void;
-    surroundContents(newParent: Node): void;
-    toString(): string;
-    readonly END_TO_END: number;
-    readonly END_TO_START: number;
-    readonly START_TO_END: number;
-    readonly START_TO_START: number;
-}
-
-declare var Range: {
-    prototype: Range;
-    new(): Range;
-    readonly END_TO_END: number;
-    readonly END_TO_START: number;
-    readonly START_TO_END: number;
-    readonly START_TO_START: number;
-}
-
-interface SVGAElement extends SVGElement, SVGStylable, SVGTransformable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGURIReference {
-    readonly target: SVGAnimatedString;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGAElement: {
-    prototype: SVGAElement;
-    new(): SVGAElement;
-}
-
-interface SVGAngle {
-    readonly unitType: number;
-    value: number;
-    valueAsString: string;
-    valueInSpecifiedUnits: number;
-    convertToSpecifiedUnits(unitType: number): void;
-    newValueSpecifiedUnits(unitType: number, valueInSpecifiedUnits: number): void;
-    readonly SVG_ANGLETYPE_DEG: number;
-    readonly SVG_ANGLETYPE_GRAD: number;
-    readonly SVG_ANGLETYPE_RAD: number;
-    readonly SVG_ANGLETYPE_UNKNOWN: number;
-    readonly SVG_ANGLETYPE_UNSPECIFIED: number;
-}
-
-declare var SVGAngle: {
-    prototype: SVGAngle;
-    new(): SVGAngle;
-    readonly SVG_ANGLETYPE_DEG: number;
-    readonly SVG_ANGLETYPE_GRAD: number;
-    readonly SVG_ANGLETYPE_RAD: number;
-    readonly SVG_ANGLETYPE_UNKNOWN: number;
-    readonly SVG_ANGLETYPE_UNSPECIFIED: number;
-}
-
-interface SVGAnimatedAngle {
-    readonly animVal: SVGAngle;
-    readonly baseVal: SVGAngle;
-}
-
-declare var SVGAnimatedAngle: {
-    prototype: SVGAnimatedAngle;
-    new(): SVGAnimatedAngle;
-}
-
-interface SVGAnimatedBoolean {
-    readonly animVal: boolean;
-    baseVal: boolean;
-}
-
-declare var SVGAnimatedBoolean: {
-    prototype: SVGAnimatedBoolean;
-    new(): SVGAnimatedBoolean;
-}
-
-interface SVGAnimatedEnumeration {
-    readonly animVal: number;
-    baseVal: number;
-}
-
-declare var SVGAnimatedEnumeration: {
-    prototype: SVGAnimatedEnumeration;
-    new(): SVGAnimatedEnumeration;
-}
-
-interface SVGAnimatedInteger {
-    readonly animVal: number;
-    baseVal: number;
-}
-
-declare var SVGAnimatedInteger: {
-    prototype: SVGAnimatedInteger;
-    new(): SVGAnimatedInteger;
-}
-
-interface SVGAnimatedLength {
-    readonly animVal: SVGLength;
-    readonly baseVal: SVGLength;
-}
-
-declare var SVGAnimatedLength: {
-    prototype: SVGAnimatedLength;
-    new(): SVGAnimatedLength;
-}
-
-interface SVGAnimatedLengthList {
-    readonly animVal: SVGLengthList;
-    readonly baseVal: SVGLengthList;
-}
-
-declare var SVGAnimatedLengthList: {
-    prototype: SVGAnimatedLengthList;
-    new(): SVGAnimatedLengthList;
-}
-
-interface SVGAnimatedNumber {
-    readonly animVal: number;
-    baseVal: number;
-}
-
-declare var SVGAnimatedNumber: {
-    prototype: SVGAnimatedNumber;
-    new(): SVGAnimatedNumber;
-}
-
-interface SVGAnimatedNumberList {
-    readonly animVal: SVGNumberList;
-    readonly baseVal: SVGNumberList;
-}
-
-declare var SVGAnimatedNumberList: {
-    prototype: SVGAnimatedNumberList;
-    new(): SVGAnimatedNumberList;
-}
-
-interface SVGAnimatedPreserveAspectRatio {
-    readonly animVal: SVGPreserveAspectRatio;
-    readonly baseVal: SVGPreserveAspectRatio;
-}
-
-declare var SVGAnimatedPreserveAspectRatio: {
-    prototype: SVGAnimatedPreserveAspectRatio;
-    new(): SVGAnimatedPreserveAspectRatio;
-}
-
-interface SVGAnimatedRect {
-    readonly animVal: SVGRect;
-    readonly baseVal: SVGRect;
-}
-
-declare var SVGAnimatedRect: {
-    prototype: SVGAnimatedRect;
-    new(): SVGAnimatedRect;
-}
-
-interface SVGAnimatedString {
-    readonly animVal: string;
-    baseVal: string;
-}
-
-declare var SVGAnimatedString: {
-    prototype: SVGAnimatedString;
-    new(): SVGAnimatedString;
-}
-
-interface SVGAnimatedTransformList {
-    readonly animVal: SVGTransformList;
-    readonly baseVal: SVGTransformList;
-}
-
-declare var SVGAnimatedTransformList: {
-    prototype: SVGAnimatedTransformList;
-    new(): SVGAnimatedTransformList;
-}
-
-interface SVGCircleElement extends SVGElement, SVGStylable, SVGTransformable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired {
-    readonly cx: SVGAnimatedLength;
-    readonly cy: SVGAnimatedLength;
-    readonly r: SVGAnimatedLength;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGCircleElement: {
-    prototype: SVGCircleElement;
-    new(): SVGCircleElement;
-}
-
-interface SVGClipPathElement extends SVGElement, SVGStylable, SVGTransformable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGUnitTypes {
-    readonly clipPathUnits: SVGAnimatedEnumeration;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGClipPathElement: {
-    prototype: SVGClipPathElement;
-    new(): SVGClipPathElement;
-}
-
-interface SVGComponentTransferFunctionElement extends SVGElement {
-    readonly amplitude: SVGAnimatedNumber;
-    readonly exponent: SVGAnimatedNumber;
-    readonly intercept: SVGAnimatedNumber;
-    readonly offset: SVGAnimatedNumber;
-    readonly slope: SVGAnimatedNumber;
-    readonly tableValues: SVGAnimatedNumberList;
-    readonly type: SVGAnimatedEnumeration;
-    readonly SVG_FECOMPONENTTRANSFER_TYPE_DISCRETE: number;
-    readonly SVG_FECOMPONENTTRANSFER_TYPE_GAMMA: number;
-    readonly SVG_FECOMPONENTTRANSFER_TYPE_IDENTITY: number;
-    readonly SVG_FECOMPONENTTRANSFER_TYPE_LINEAR: number;
-    readonly SVG_FECOMPONENTTRANSFER_TYPE_TABLE: number;
-    readonly SVG_FECOMPONENTTRANSFER_TYPE_UNKNOWN: number;
-}
-
-declare var SVGComponentTransferFunctionElement: {
-    prototype: SVGComponentTransferFunctionElement;
-    new(): SVGComponentTransferFunctionElement;
-    readonly SVG_FECOMPONENTTRANSFER_TYPE_DISCRETE: number;
-    readonly SVG_FECOMPONENTTRANSFER_TYPE_GAMMA: number;
-    readonly SVG_FECOMPONENTTRANSFER_TYPE_IDENTITY: number;
-    readonly SVG_FECOMPONENTTRANSFER_TYPE_LINEAR: number;
-    readonly SVG_FECOMPONENTTRANSFER_TYPE_TABLE: number;
-    readonly SVG_FECOMPONENTTRANSFER_TYPE_UNKNOWN: number;
-}
-
-interface SVGDefsElement extends SVGElement, SVGStylable, SVGTransformable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired {
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGDefsElement: {
-    prototype: SVGDefsElement;
-    new(): SVGDefsElement;
-}
-
-interface SVGDescElement extends SVGElement, SVGStylable, SVGLangSpace {
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGDescElement: {
-    prototype: SVGDescElement;
-    new(): SVGDescElement;
-}
-
-interface SVGElement extends Element {
-    onclick: (this: this, ev: MouseEvent) => any;
-    ondblclick: (this: this, ev: MouseEvent) => any;
-    onfocusin: (this: this, ev: FocusEvent) => any;
-    onfocusout: (this: this, ev: FocusEvent) => any;
-    onload: (this: this, ev: Event) => any;
-    onmousedown: (this: this, ev: MouseEvent) => any;
-    onmousemove: (this: this, ev: MouseEvent) => any;
-    onmouseout: (this: this, ev: MouseEvent) => any;
-    onmouseover: (this: this, ev: MouseEvent) => any;
-    onmouseup: (this: this, ev: MouseEvent) => any;
-    readonly ownerSVGElement: SVGSVGElement;
-    readonly viewportElement: SVGElement;
-    xmlbase: string;
-    className: any;
-    addEventListener(type: "MSGestureChange", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureDoubleTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureEnd", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureHold", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGotPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSInertiaStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSLostPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerCancel", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerDown", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerEnter", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerLeave", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerMove", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOut", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOver", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerUp", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ariarequest", listener: (this: this, ev: AriaRequestEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "click", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "command", listener: (this: this, ev: CommandEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dblclick", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "focusin", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "focusout", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "gotpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "lostpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousedown", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousemove", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseout", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseover", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseup", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointercancel", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerdown", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerenter", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerleave", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointermove", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerout", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerover", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerup", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchcancel", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchend", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchmove", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchstart", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenerror", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "wheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGElement: {
-    prototype: SVGElement;
-    new(): SVGElement;
-}
-
-interface SVGElementInstance extends EventTarget {
-    readonly childNodes: SVGElementInstanceList;
-    readonly correspondingElement: SVGElement;
-    readonly correspondingUseElement: SVGUseElement;
-    readonly firstChild: SVGElementInstance;
-    readonly lastChild: SVGElementInstance;
-    readonly nextSibling: SVGElementInstance;
-    readonly parentNode: SVGElementInstance;
-    readonly previousSibling: SVGElementInstance;
-}
-
-declare var SVGElementInstance: {
-    prototype: SVGElementInstance;
-    new(): SVGElementInstance;
-}
-
-interface SVGElementInstanceList {
-    readonly length: number;
-    item(index: number): SVGElementInstance;
-}
-
-declare var SVGElementInstanceList: {
-    prototype: SVGElementInstanceList;
-    new(): SVGElementInstanceList;
-}
-
-interface SVGEllipseElement extends SVGElement, SVGStylable, SVGTransformable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired {
-    readonly cx: SVGAnimatedLength;
-    readonly cy: SVGAnimatedLength;
-    readonly rx: SVGAnimatedLength;
-    readonly ry: SVGAnimatedLength;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGEllipseElement: {
-    prototype: SVGEllipseElement;
-    new(): SVGEllipseElement;
-}
-
-interface SVGFEBlendElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
-    readonly in1: SVGAnimatedString;
-    readonly in2: SVGAnimatedString;
-    readonly mode: SVGAnimatedEnumeration;
-    readonly SVG_FEBLEND_MODE_COLOR: number;
-    readonly SVG_FEBLEND_MODE_COLOR_BURN: number;
-    readonly SVG_FEBLEND_MODE_COLOR_DODGE: number;
-    readonly SVG_FEBLEND_MODE_DARKEN: number;
-    readonly SVG_FEBLEND_MODE_DIFFERENCE: number;
-    readonly SVG_FEBLEND_MODE_EXCLUSION: number;
-    readonly SVG_FEBLEND_MODE_HARD_LIGHT: number;
-    readonly SVG_FEBLEND_MODE_HUE: number;
-    readonly SVG_FEBLEND_MODE_LIGHTEN: number;
-    readonly SVG_FEBLEND_MODE_LUMINOSITY: number;
-    readonly SVG_FEBLEND_MODE_MULTIPLY: number;
-    readonly SVG_FEBLEND_MODE_NORMAL: number;
-    readonly SVG_FEBLEND_MODE_OVERLAY: number;
-    readonly SVG_FEBLEND_MODE_SATURATION: number;
-    readonly SVG_FEBLEND_MODE_SCREEN: number;
-    readonly SVG_FEBLEND_MODE_SOFT_LIGHT: number;
-    readonly SVG_FEBLEND_MODE_UNKNOWN: number;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFEBlendElement: {
-    prototype: SVGFEBlendElement;
-    new(): SVGFEBlendElement;
-    readonly SVG_FEBLEND_MODE_COLOR: number;
-    readonly SVG_FEBLEND_MODE_COLOR_BURN: number;
-    readonly SVG_FEBLEND_MODE_COLOR_DODGE: number;
-    readonly SVG_FEBLEND_MODE_DARKEN: number;
-    readonly SVG_FEBLEND_MODE_DIFFERENCE: number;
-    readonly SVG_FEBLEND_MODE_EXCLUSION: number;
-    readonly SVG_FEBLEND_MODE_HARD_LIGHT: number;
-    readonly SVG_FEBLEND_MODE_HUE: number;
-    readonly SVG_FEBLEND_MODE_LIGHTEN: number;
-    readonly SVG_FEBLEND_MODE_LUMINOSITY: number;
-    readonly SVG_FEBLEND_MODE_MULTIPLY: number;
-    readonly SVG_FEBLEND_MODE_NORMAL: number;
-    readonly SVG_FEBLEND_MODE_OVERLAY: number;
-    readonly SVG_FEBLEND_MODE_SATURATION: number;
-    readonly SVG_FEBLEND_MODE_SCREEN: number;
-    readonly SVG_FEBLEND_MODE_SOFT_LIGHT: number;
-    readonly SVG_FEBLEND_MODE_UNKNOWN: number;
-}
-
-interface SVGFEColorMatrixElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
-    readonly in1: SVGAnimatedString;
-    readonly type: SVGAnimatedEnumeration;
-    readonly values: SVGAnimatedNumberList;
-    readonly SVG_FECOLORMATRIX_TYPE_HUEROTATE: number;
-    readonly SVG_FECOLORMATRIX_TYPE_LUMINANCETOALPHA: number;
-    readonly SVG_FECOLORMATRIX_TYPE_MATRIX: number;
-    readonly SVG_FECOLORMATRIX_TYPE_SATURATE: number;
-    readonly SVG_FECOLORMATRIX_TYPE_UNKNOWN: number;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFEColorMatrixElement: {
-    prototype: SVGFEColorMatrixElement;
-    new(): SVGFEColorMatrixElement;
-    readonly SVG_FECOLORMATRIX_TYPE_HUEROTATE: number;
-    readonly SVG_FECOLORMATRIX_TYPE_LUMINANCETOALPHA: number;
-    readonly SVG_FECOLORMATRIX_TYPE_MATRIX: number;
-    readonly SVG_FECOLORMATRIX_TYPE_SATURATE: number;
-    readonly SVG_FECOLORMATRIX_TYPE_UNKNOWN: number;
-}
-
-interface SVGFEComponentTransferElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
-    readonly in1: SVGAnimatedString;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFEComponentTransferElement: {
-    prototype: SVGFEComponentTransferElement;
-    new(): SVGFEComponentTransferElement;
-}
-
-interface SVGFECompositeElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
-    readonly in1: SVGAnimatedString;
-    readonly in2: SVGAnimatedString;
-    readonly k1: SVGAnimatedNumber;
-    readonly k2: SVGAnimatedNumber;
-    readonly k3: SVGAnimatedNumber;
-    readonly k4: SVGAnimatedNumber;
-    readonly operator: SVGAnimatedEnumeration;
-    readonly SVG_FECOMPOSITE_OPERATOR_ARITHMETIC: number;
-    readonly SVG_FECOMPOSITE_OPERATOR_ATOP: number;
-    readonly SVG_FECOMPOSITE_OPERATOR_IN: number;
-    readonly SVG_FECOMPOSITE_OPERATOR_OUT: number;
-    readonly SVG_FECOMPOSITE_OPERATOR_OVER: number;
-    readonly SVG_FECOMPOSITE_OPERATOR_UNKNOWN: number;
-    readonly SVG_FECOMPOSITE_OPERATOR_XOR: number;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFECompositeElement: {
-    prototype: SVGFECompositeElement;
-    new(): SVGFECompositeElement;
-    readonly SVG_FECOMPOSITE_OPERATOR_ARITHMETIC: number;
-    readonly SVG_FECOMPOSITE_OPERATOR_ATOP: number;
-    readonly SVG_FECOMPOSITE_OPERATOR_IN: number;
-    readonly SVG_FECOMPOSITE_OPERATOR_OUT: number;
-    readonly SVG_FECOMPOSITE_OPERATOR_OVER: number;
-    readonly SVG_FECOMPOSITE_OPERATOR_UNKNOWN: number;
-    readonly SVG_FECOMPOSITE_OPERATOR_XOR: number;
-}
-
-interface SVGFEConvolveMatrixElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
-    readonly bias: SVGAnimatedNumber;
-    readonly divisor: SVGAnimatedNumber;
-    readonly edgeMode: SVGAnimatedEnumeration;
-    readonly in1: SVGAnimatedString;
-    readonly kernelMatrix: SVGAnimatedNumberList;
-    readonly kernelUnitLengthX: SVGAnimatedNumber;
-    readonly kernelUnitLengthY: SVGAnimatedNumber;
-    readonly orderX: SVGAnimatedInteger;
-    readonly orderY: SVGAnimatedInteger;
-    readonly preserveAlpha: SVGAnimatedBoolean;
-    readonly targetX: SVGAnimatedInteger;
-    readonly targetY: SVGAnimatedInteger;
-    readonly SVG_EDGEMODE_DUPLICATE: number;
-    readonly SVG_EDGEMODE_NONE: number;
-    readonly SVG_EDGEMODE_UNKNOWN: number;
-    readonly SVG_EDGEMODE_WRAP: number;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFEConvolveMatrixElement: {
-    prototype: SVGFEConvolveMatrixElement;
-    new(): SVGFEConvolveMatrixElement;
-    readonly SVG_EDGEMODE_DUPLICATE: number;
-    readonly SVG_EDGEMODE_NONE: number;
-    readonly SVG_EDGEMODE_UNKNOWN: number;
-    readonly SVG_EDGEMODE_WRAP: number;
-}
-
-interface SVGFEDiffuseLightingElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
-    readonly diffuseConstant: SVGAnimatedNumber;
-    readonly in1: SVGAnimatedString;
-    readonly kernelUnitLengthX: SVGAnimatedNumber;
-    readonly kernelUnitLengthY: SVGAnimatedNumber;
-    readonly surfaceScale: SVGAnimatedNumber;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFEDiffuseLightingElement: {
-    prototype: SVGFEDiffuseLightingElement;
-    new(): SVGFEDiffuseLightingElement;
-}
-
-interface SVGFEDisplacementMapElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
-    readonly in1: SVGAnimatedString;
-    readonly in2: SVGAnimatedString;
-    readonly scale: SVGAnimatedNumber;
-    readonly xChannelSelector: SVGAnimatedEnumeration;
-    readonly yChannelSelector: SVGAnimatedEnumeration;
-    readonly SVG_CHANNEL_A: number;
-    readonly SVG_CHANNEL_B: number;
-    readonly SVG_CHANNEL_G: number;
-    readonly SVG_CHANNEL_R: number;
-    readonly SVG_CHANNEL_UNKNOWN: number;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFEDisplacementMapElement: {
-    prototype: SVGFEDisplacementMapElement;
-    new(): SVGFEDisplacementMapElement;
-    readonly SVG_CHANNEL_A: number;
-    readonly SVG_CHANNEL_B: number;
-    readonly SVG_CHANNEL_G: number;
-    readonly SVG_CHANNEL_R: number;
-    readonly SVG_CHANNEL_UNKNOWN: number;
-}
-
-interface SVGFEDistantLightElement extends SVGElement {
-    readonly azimuth: SVGAnimatedNumber;
-    readonly elevation: SVGAnimatedNumber;
-}
-
-declare var SVGFEDistantLightElement: {
-    prototype: SVGFEDistantLightElement;
-    new(): SVGFEDistantLightElement;
-}
-
-interface SVGFEFloodElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFEFloodElement: {
-    prototype: SVGFEFloodElement;
-    new(): SVGFEFloodElement;
-}
-
-interface SVGFEFuncAElement extends SVGComponentTransferFunctionElement {
-}
-
-declare var SVGFEFuncAElement: {
-    prototype: SVGFEFuncAElement;
-    new(): SVGFEFuncAElement;
-}
-
-interface SVGFEFuncBElement extends SVGComponentTransferFunctionElement {
-}
-
-declare var SVGFEFuncBElement: {
-    prototype: SVGFEFuncBElement;
-    new(): SVGFEFuncBElement;
-}
-
-interface SVGFEFuncGElement extends SVGComponentTransferFunctionElement {
-}
-
-declare var SVGFEFuncGElement: {
-    prototype: SVGFEFuncGElement;
-    new(): SVGFEFuncGElement;
-}
-
-interface SVGFEFuncRElement extends SVGComponentTransferFunctionElement {
-}
-
-declare var SVGFEFuncRElement: {
-    prototype: SVGFEFuncRElement;
-    new(): SVGFEFuncRElement;
-}
-
-interface SVGFEGaussianBlurElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
-    readonly in1: SVGAnimatedString;
-    readonly stdDeviationX: SVGAnimatedNumber;
-    readonly stdDeviationY: SVGAnimatedNumber;
-    setStdDeviation(stdDeviationX: number, stdDeviationY: number): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFEGaussianBlurElement: {
-    prototype: SVGFEGaussianBlurElement;
-    new(): SVGFEGaussianBlurElement;
-}
-
-interface SVGFEImageElement extends SVGElement, SVGFilterPrimitiveStandardAttributes, SVGLangSpace, SVGURIReference, SVGExternalResourcesRequired {
-    readonly preserveAspectRatio: SVGAnimatedPreserveAspectRatio;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFEImageElement: {
-    prototype: SVGFEImageElement;
-    new(): SVGFEImageElement;
-}
-
-interface SVGFEMergeElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFEMergeElement: {
-    prototype: SVGFEMergeElement;
-    new(): SVGFEMergeElement;
-}
-
-interface SVGFEMergeNodeElement extends SVGElement {
-    readonly in1: SVGAnimatedString;
-}
-
-declare var SVGFEMergeNodeElement: {
-    prototype: SVGFEMergeNodeElement;
-    new(): SVGFEMergeNodeElement;
-}
-
-interface SVGFEMorphologyElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
-    readonly in1: SVGAnimatedString;
-    readonly operator: SVGAnimatedEnumeration;
-    readonly radiusX: SVGAnimatedNumber;
-    readonly radiusY: SVGAnimatedNumber;
-    readonly SVG_MORPHOLOGY_OPERATOR_DILATE: number;
-    readonly SVG_MORPHOLOGY_OPERATOR_ERODE: number;
-    readonly SVG_MORPHOLOGY_OPERATOR_UNKNOWN: number;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFEMorphologyElement: {
-    prototype: SVGFEMorphologyElement;
-    new(): SVGFEMorphologyElement;
-    readonly SVG_MORPHOLOGY_OPERATOR_DILATE: number;
-    readonly SVG_MORPHOLOGY_OPERATOR_ERODE: number;
-    readonly SVG_MORPHOLOGY_OPERATOR_UNKNOWN: number;
-}
-
-interface SVGFEOffsetElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
-    readonly dx: SVGAnimatedNumber;
-    readonly dy: SVGAnimatedNumber;
-    readonly in1: SVGAnimatedString;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFEOffsetElement: {
-    prototype: SVGFEOffsetElement;
-    new(): SVGFEOffsetElement;
-}
-
-interface SVGFEPointLightElement extends SVGElement {
-    readonly x: SVGAnimatedNumber;
-    readonly y: SVGAnimatedNumber;
-    readonly z: SVGAnimatedNumber;
-}
-
-declare var SVGFEPointLightElement: {
-    prototype: SVGFEPointLightElement;
-    new(): SVGFEPointLightElement;
-}
-
-interface SVGFESpecularLightingElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
-    readonly in1: SVGAnimatedString;
-    readonly kernelUnitLengthX: SVGAnimatedNumber;
-    readonly kernelUnitLengthY: SVGAnimatedNumber;
-    readonly specularConstant: SVGAnimatedNumber;
-    readonly specularExponent: SVGAnimatedNumber;
-    readonly surfaceScale: SVGAnimatedNumber;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFESpecularLightingElement: {
-    prototype: SVGFESpecularLightingElement;
-    new(): SVGFESpecularLightingElement;
-}
-
-interface SVGFESpotLightElement extends SVGElement {
-    readonly limitingConeAngle: SVGAnimatedNumber;
-    readonly pointsAtX: SVGAnimatedNumber;
-    readonly pointsAtY: SVGAnimatedNumber;
-    readonly pointsAtZ: SVGAnimatedNumber;
-    readonly specularExponent: SVGAnimatedNumber;
-    readonly x: SVGAnimatedNumber;
-    readonly y: SVGAnimatedNumber;
-    readonly z: SVGAnimatedNumber;
-}
-
-declare var SVGFESpotLightElement: {
-    prototype: SVGFESpotLightElement;
-    new(): SVGFESpotLightElement;
-}
-
-interface SVGFETileElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
-    readonly in1: SVGAnimatedString;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFETileElement: {
-    prototype: SVGFETileElement;
-    new(): SVGFETileElement;
-}
-
-interface SVGFETurbulenceElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
-    readonly baseFrequencyX: SVGAnimatedNumber;
-    readonly baseFrequencyY: SVGAnimatedNumber;
-    readonly numOctaves: SVGAnimatedInteger;
-    readonly seed: SVGAnimatedNumber;
-    readonly stitchTiles: SVGAnimatedEnumeration;
-    readonly type: SVGAnimatedEnumeration;
-    readonly SVG_STITCHTYPE_NOSTITCH: number;
-    readonly SVG_STITCHTYPE_STITCH: number;
-    readonly SVG_STITCHTYPE_UNKNOWN: number;
-    readonly SVG_TURBULENCE_TYPE_FRACTALNOISE: number;
-    readonly SVG_TURBULENCE_TYPE_TURBULENCE: number;
-    readonly SVG_TURBULENCE_TYPE_UNKNOWN: number;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFETurbulenceElement: {
-    prototype: SVGFETurbulenceElement;
-    new(): SVGFETurbulenceElement;
-    readonly SVG_STITCHTYPE_NOSTITCH: number;
-    readonly SVG_STITCHTYPE_STITCH: number;
-    readonly SVG_STITCHTYPE_UNKNOWN: number;
-    readonly SVG_TURBULENCE_TYPE_FRACTALNOISE: number;
-    readonly SVG_TURBULENCE_TYPE_TURBULENCE: number;
-    readonly SVG_TURBULENCE_TYPE_UNKNOWN: number;
-}
-
-interface SVGFilterElement extends SVGElement, SVGUnitTypes, SVGStylable, SVGLangSpace, SVGURIReference, SVGExternalResourcesRequired {
-    readonly filterResX: SVGAnimatedInteger;
-    readonly filterResY: SVGAnimatedInteger;
-    readonly filterUnits: SVGAnimatedEnumeration;
-    readonly height: SVGAnimatedLength;
-    readonly primitiveUnits: SVGAnimatedEnumeration;
-    readonly width: SVGAnimatedLength;
-    readonly x: SVGAnimatedLength;
-    readonly y: SVGAnimatedLength;
-    setFilterRes(filterResX: number, filterResY: number): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFilterElement: {
-    prototype: SVGFilterElement;
-    new(): SVGFilterElement;
-}
-
-interface SVGForeignObjectElement extends SVGElement, SVGStylable, SVGTransformable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired {
-    readonly height: SVGAnimatedLength;
-    readonly width: SVGAnimatedLength;
-    readonly x: SVGAnimatedLength;
-    readonly y: SVGAnimatedLength;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGForeignObjectElement: {
-    prototype: SVGForeignObjectElement;
-    new(): SVGForeignObjectElement;
-}
-
-interface SVGGElement extends SVGElement, SVGStylable, SVGTransformable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired {
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGGElement: {
-    prototype: SVGGElement;
-    new(): SVGGElement;
-}
-
-interface SVGGradientElement extends SVGElement, SVGStylable, SVGExternalResourcesRequired, SVGURIReference, SVGUnitTypes {
-    readonly gradientTransform: SVGAnimatedTransformList;
-    readonly gradientUnits: SVGAnimatedEnumeration;
-    readonly spreadMethod: SVGAnimatedEnumeration;
-    readonly SVG_SPREADMETHOD_PAD: number;
-    readonly SVG_SPREADMETHOD_REFLECT: number;
-    readonly SVG_SPREADMETHOD_REPEAT: number;
-    readonly SVG_SPREADMETHOD_UNKNOWN: number;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGGradientElement: {
-    prototype: SVGGradientElement;
-    new(): SVGGradientElement;
-    readonly SVG_SPREADMETHOD_PAD: number;
-    readonly SVG_SPREADMETHOD_REFLECT: number;
-    readonly SVG_SPREADMETHOD_REPEAT: number;
-    readonly SVG_SPREADMETHOD_UNKNOWN: number;
-}
-
-interface SVGImageElement extends SVGElement, SVGStylable, SVGTransformable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGURIReference {
-    readonly height: SVGAnimatedLength;
-    readonly preserveAspectRatio: SVGAnimatedPreserveAspectRatio;
-    readonly width: SVGAnimatedLength;
-    readonly x: SVGAnimatedLength;
-    readonly y: SVGAnimatedLength;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGImageElement: {
-    prototype: SVGImageElement;
-    new(): SVGImageElement;
-}
-
-interface SVGLength {
-    readonly unitType: number;
-    value: number;
-    valueAsString: string;
-    valueInSpecifiedUnits: number;
-    convertToSpecifiedUnits(unitType: number): void;
-    newValueSpecifiedUnits(unitType: number, valueInSpecifiedUnits: number): void;
-    readonly SVG_LENGTHTYPE_CM: number;
-    readonly SVG_LENGTHTYPE_EMS: number;
-    readonly SVG_LENGTHTYPE_EXS: number;
-    readonly SVG_LENGTHTYPE_IN: number;
-    readonly SVG_LENGTHTYPE_MM: number;
-    readonly SVG_LENGTHTYPE_NUMBER: number;
-    readonly SVG_LENGTHTYPE_PC: number;
-    readonly SVG_LENGTHTYPE_PERCENTAGE: number;
-    readonly SVG_LENGTHTYPE_PT: number;
-    readonly SVG_LENGTHTYPE_PX: number;
-    readonly SVG_LENGTHTYPE_UNKNOWN: number;
-}
-
-declare var SVGLength: {
-    prototype: SVGLength;
-    new(): SVGLength;
-    readonly SVG_LENGTHTYPE_CM: number;
-    readonly SVG_LENGTHTYPE_EMS: number;
-    readonly SVG_LENGTHTYPE_EXS: number;
-    readonly SVG_LENGTHTYPE_IN: number;
-    readonly SVG_LENGTHTYPE_MM: number;
-    readonly SVG_LENGTHTYPE_NUMBER: number;
-    readonly SVG_LENGTHTYPE_PC: number;
-    readonly SVG_LENGTHTYPE_PERCENTAGE: number;
-    readonly SVG_LENGTHTYPE_PT: number;
-    readonly SVG_LENGTHTYPE_PX: number;
-    readonly SVG_LENGTHTYPE_UNKNOWN: number;
-}
-
-interface SVGLengthList {
-    readonly numberOfItems: number;
-    appendItem(newItem: SVGLength): SVGLength;
-    clear(): void;
-    getItem(index: number): SVGLength;
-    initialize(newItem: SVGLength): SVGLength;
-    insertItemBefore(newItem: SVGLength, index: number): SVGLength;
-    removeItem(index: number): SVGLength;
-    replaceItem(newItem: SVGLength, index: number): SVGLength;
-}
-
-declare var SVGLengthList: {
-    prototype: SVGLengthList;
-    new(): SVGLengthList;
-}
-
-interface SVGLineElement extends SVGElement, SVGStylable, SVGTransformable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired {
-    readonly x1: SVGAnimatedLength;
-    readonly x2: SVGAnimatedLength;
-    readonly y1: SVGAnimatedLength;
-    readonly y2: SVGAnimatedLength;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGLineElement: {
-    prototype: SVGLineElement;
-    new(): SVGLineElement;
-}
-
-interface SVGLinearGradientElement extends SVGGradientElement {
-    readonly x1: SVGAnimatedLength;
-    readonly x2: SVGAnimatedLength;
-    readonly y1: SVGAnimatedLength;
-    readonly y2: SVGAnimatedLength;
-}
-
-declare var SVGLinearGradientElement: {
-    prototype: SVGLinearGradientElement;
-    new(): SVGLinearGradientElement;
-}
-
-interface SVGMarkerElement extends SVGElement, SVGStylable, SVGLangSpace, SVGExternalResourcesRequired, SVGFitToViewBox {
-    readonly markerHeight: SVGAnimatedLength;
-    readonly markerUnits: SVGAnimatedEnumeration;
-    readonly markerWidth: SVGAnimatedLength;
-    readonly orientAngle: SVGAnimatedAngle;
-    readonly orientType: SVGAnimatedEnumeration;
-    readonly refX: SVGAnimatedLength;
-    readonly refY: SVGAnimatedLength;
-    setOrientToAngle(angle: SVGAngle): void;
-    setOrientToAuto(): void;
-    readonly SVG_MARKERUNITS_STROKEWIDTH: number;
-    readonly SVG_MARKERUNITS_UNKNOWN: number;
-    readonly SVG_MARKERUNITS_USERSPACEONUSE: number;
-    readonly SVG_MARKER_ORIENT_ANGLE: number;
-    readonly SVG_MARKER_ORIENT_AUTO: number;
-    readonly SVG_MARKER_ORIENT_UNKNOWN: number;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGMarkerElement: {
-    prototype: SVGMarkerElement;
-    new(): SVGMarkerElement;
-    readonly SVG_MARKERUNITS_STROKEWIDTH: number;
-    readonly SVG_MARKERUNITS_UNKNOWN: number;
-    readonly SVG_MARKERUNITS_USERSPACEONUSE: number;
-    readonly SVG_MARKER_ORIENT_ANGLE: number;
-    readonly SVG_MARKER_ORIENT_AUTO: number;
-    readonly SVG_MARKER_ORIENT_UNKNOWN: number;
-}
-
-interface SVGMaskElement extends SVGElement, SVGStylable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGUnitTypes {
-    readonly height: SVGAnimatedLength;
-    readonly maskContentUnits: SVGAnimatedEnumeration;
-    readonly maskUnits: SVGAnimatedEnumeration;
-    readonly width: SVGAnimatedLength;
-    readonly x: SVGAnimatedLength;
-    readonly y: SVGAnimatedLength;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGMaskElement: {
-    prototype: SVGMaskElement;
-    new(): SVGMaskElement;
-}
-
-interface SVGMatrix {
-    a: number;
-    b: number;
-    c: number;
-    d: number;
-    e: number;
-    f: number;
-    flipX(): SVGMatrix;
-    flipY(): SVGMatrix;
-    inverse(): SVGMatrix;
-    multiply(secondMatrix: SVGMatrix): SVGMatrix;
-    rotate(angle: number): SVGMatrix;
-    rotateFromVector(x: number, y: number): SVGMatrix;
-    scale(scaleFactor: number): SVGMatrix;
-    scaleNonUniform(scaleFactorX: number, scaleFactorY: number): SVGMatrix;
-    skewX(angle: number): SVGMatrix;
-    skewY(angle: number): SVGMatrix;
-    translate(x: number, y: number): SVGMatrix;
-}
-
-declare var SVGMatrix: {
-    prototype: SVGMatrix;
-    new(): SVGMatrix;
-}
-
-interface SVGMetadataElement extends SVGElement {
-}
-
-declare var SVGMetadataElement: {
-    prototype: SVGMetadataElement;
-    new(): SVGMetadataElement;
-}
-
-interface SVGNumber {
-    value: number;
-}
-
-declare var SVGNumber: {
-    prototype: SVGNumber;
-    new(): SVGNumber;
-}
-
-interface SVGNumberList {
-    readonly numberOfItems: number;
-    appendItem(newItem: SVGNumber): SVGNumber;
-    clear(): void;
-    getItem(index: number): SVGNumber;
-    initialize(newItem: SVGNumber): SVGNumber;
-    insertItemBefore(newItem: SVGNumber, index: number): SVGNumber;
-    removeItem(index: number): SVGNumber;
-    replaceItem(newItem: SVGNumber, index: number): SVGNumber;
-}
-
-declare var SVGNumberList: {
-    prototype: SVGNumberList;
-    new(): SVGNumberList;
-}
-
-interface SVGPathElement extends SVGElement, SVGStylable, SVGTransformable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGAnimatedPathData {
-    createSVGPathSegArcAbs(x: number, y: number, r1: number, r2: number, angle: number, largeArcFlag: boolean, sweepFlag: boolean): SVGPathSegArcAbs;
-    createSVGPathSegArcRel(x: number, y: number, r1: number, r2: number, angle: number, largeArcFlag: boolean, sweepFlag: boolean): SVGPathSegArcRel;
-    createSVGPathSegClosePath(): SVGPathSegClosePath;
-    createSVGPathSegCurvetoCubicAbs(x: number, y: number, x1: number, y1: number, x2: number, y2: number): SVGPathSegCurvetoCubicAbs;
-    createSVGPathSegCurvetoCubicRel(x: number, y: number, x1: number, y1: number, x2: number, y2: number): SVGPathSegCurvetoCubicRel;
-    createSVGPathSegCurvetoCubicSmoothAbs(x: number, y: number, x2: number, y2: number): SVGPathSegCurvetoCubicSmoothAbs;
-    createSVGPathSegCurvetoCubicSmoothRel(x: number, y: number, x2: number, y2: number): SVGPathSegCurvetoCubicSmoothRel;
-    createSVGPathSegCurvetoQuadraticAbs(x: number, y: number, x1: number, y1: number): SVGPathSegCurvetoQuadraticAbs;
-    createSVGPathSegCurvetoQuadraticRel(x: number, y: number, x1: number, y1: number): SVGPathSegCurvetoQuadraticRel;
-    createSVGPathSegCurvetoQuadraticSmoothAbs(x: number, y: number): SVGPathSegCurvetoQuadraticSmoothAbs;
-    createSVGPathSegCurvetoQuadraticSmoothRel(x: number, y: number): SVGPathSegCurvetoQuadraticSmoothRel;
-    createSVGPathSegLinetoAbs(x: number, y: number): SVGPathSegLinetoAbs;
-    createSVGPathSegLinetoHorizontalAbs(x: number): SVGPathSegLinetoHorizontalAbs;
-    createSVGPathSegLinetoHorizontalRel(x: number): SVGPathSegLinetoHorizontalRel;
-    createSVGPathSegLinetoRel(x: number, y: number): SVGPathSegLinetoRel;
-    createSVGPathSegLinetoVerticalAbs(y: number): SVGPathSegLinetoVerticalAbs;
-    createSVGPathSegLinetoVerticalRel(y: number): SVGPathSegLinetoVerticalRel;
-    createSVGPathSegMovetoAbs(x: number, y: number): SVGPathSegMovetoAbs;
-    createSVGPathSegMovetoRel(x: number, y: number): SVGPathSegMovetoRel;
-    getPathSegAtLength(distance: number): number;
-    getPointAtLength(distance: number): SVGPoint;
-    getTotalLength(): number;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGPathElement: {
-    prototype: SVGPathElement;
-    new(): SVGPathElement;
-}
-
-interface SVGPathSeg {
-    readonly pathSegType: number;
-    readonly pathSegTypeAsLetter: string;
-    readonly PATHSEG_ARC_ABS: number;
-    readonly PATHSEG_ARC_REL: number;
-    readonly PATHSEG_CLOSEPATH: number;
-    readonly PATHSEG_CURVETO_CUBIC_ABS: number;
-    readonly PATHSEG_CURVETO_CUBIC_REL: number;
-    readonly PATHSEG_CURVETO_CUBIC_SMOOTH_ABS: number;
-    readonly PATHSEG_CURVETO_CUBIC_SMOOTH_REL: number;
-    readonly PATHSEG_CURVETO_QUADRATIC_ABS: number;
-    readonly PATHSEG_CURVETO_QUADRATIC_REL: number;
-    readonly PATHSEG_CURVETO_QUADRATIC_SMOOTH_ABS: number;
-    readonly PATHSEG_CURVETO_QUADRATIC_SMOOTH_REL: number;
-    readonly PATHSEG_LINETO_ABS: number;
-    readonly PATHSEG_LINETO_HORIZONTAL_ABS: number;
-    readonly PATHSEG_LINETO_HORIZONTAL_REL: number;
-    readonly PATHSEG_LINETO_REL: number;
-    readonly PATHSEG_LINETO_VERTICAL_ABS: number;
-    readonly PATHSEG_LINETO_VERTICAL_REL: number;
-    readonly PATHSEG_MOVETO_ABS: number;
-    readonly PATHSEG_MOVETO_REL: number;
-    readonly PATHSEG_UNKNOWN: number;
-}
-
-declare var SVGPathSeg: {
-    prototype: SVGPathSeg;
-    new(): SVGPathSeg;
-    readonly PATHSEG_ARC_ABS: number;
-    readonly PATHSEG_ARC_REL: number;
-    readonly PATHSEG_CLOSEPATH: number;
-    readonly PATHSEG_CURVETO_CUBIC_ABS: number;
-    readonly PATHSEG_CURVETO_CUBIC_REL: number;
-    readonly PATHSEG_CURVETO_CUBIC_SMOOTH_ABS: number;
-    readonly PATHSEG_CURVETO_CUBIC_SMOOTH_REL: number;
-    readonly PATHSEG_CURVETO_QUADRATIC_ABS: number;
-    readonly PATHSEG_CURVETO_QUADRATIC_REL: number;
-    readonly PATHSEG_CURVETO_QUADRATIC_SMOOTH_ABS: number;
-    readonly PATHSEG_CURVETO_QUADRATIC_SMOOTH_REL: number;
-    readonly PATHSEG_LINETO_ABS: number;
-    readonly PATHSEG_LINETO_HORIZONTAL_ABS: number;
-    readonly PATHSEG_LINETO_HORIZONTAL_REL: number;
-    readonly PATHSEG_LINETO_REL: number;
-    readonly PATHSEG_LINETO_VERTICAL_ABS: number;
-    readonly PATHSEG_LINETO_VERTICAL_REL: number;
-    readonly PATHSEG_MOVETO_ABS: number;
-    readonly PATHSEG_MOVETO_REL: number;
-    readonly PATHSEG_UNKNOWN: number;
-}
-
-interface SVGPathSegArcAbs extends SVGPathSeg {
-    angle: number;
-    largeArcFlag: boolean;
-    r1: number;
-    r2: number;
-    sweepFlag: boolean;
-    x: number;
-    y: number;
-}
-
-declare var SVGPathSegArcAbs: {
-    prototype: SVGPathSegArcAbs;
-    new(): SVGPathSegArcAbs;
-}
-
-interface SVGPathSegArcRel extends SVGPathSeg {
-    angle: number;
-    largeArcFlag: boolean;
-    r1: number;
-    r2: number;
-    sweepFlag: boolean;
-    x: number;
-    y: number;
-}
-
-declare var SVGPathSegArcRel: {
-    prototype: SVGPathSegArcRel;
-    new(): SVGPathSegArcRel;
-}
-
-interface SVGPathSegClosePath extends SVGPathSeg {
-}
-
-declare var SVGPathSegClosePath: {
-    prototype: SVGPathSegClosePath;
-    new(): SVGPathSegClosePath;
-}
-
-interface SVGPathSegCurvetoCubicAbs extends SVGPathSeg {
-    x: number;
-    x1: number;
-    x2: number;
-    y: number;
-    y1: number;
-    y2: number;
-}
-
-declare var SVGPathSegCurvetoCubicAbs: {
-    prototype: SVGPathSegCurvetoCubicAbs;
-    new(): SVGPathSegCurvetoCubicAbs;
-}
-
-interface SVGPathSegCurvetoCubicRel extends SVGPathSeg {
-    x: number;
-    x1: number;
-    x2: number;
-    y: number;
-    y1: number;
-    y2: number;
-}
-
-declare var SVGPathSegCurvetoCubicRel: {
-    prototype: SVGPathSegCurvetoCubicRel;
-    new(): SVGPathSegCurvetoCubicRel;
-}
-
-interface SVGPathSegCurvetoCubicSmoothAbs extends SVGPathSeg {
-    x: number;
-    x2: number;
-    y: number;
-    y2: number;
-}
-
-declare var SVGPathSegCurvetoCubicSmoothAbs: {
-    prototype: SVGPathSegCurvetoCubicSmoothAbs;
-    new(): SVGPathSegCurvetoCubicSmoothAbs;
-}
-
-interface SVGPathSegCurvetoCubicSmoothRel extends SVGPathSeg {
-    x: number;
-    x2: number;
-    y: number;
-    y2: number;
-}
-
-declare var SVGPathSegCurvetoCubicSmoothRel: {
-    prototype: SVGPathSegCurvetoCubicSmoothRel;
-    new(): SVGPathSegCurvetoCubicSmoothRel;
-}
-
-interface SVGPathSegCurvetoQuadraticAbs extends SVGPathSeg {
-    x: number;
-    x1: number;
-    y: number;
-    y1: number;
-}
-
-declare var SVGPathSegCurvetoQuadraticAbs: {
-    prototype: SVGPathSegCurvetoQuadraticAbs;
-    new(): SVGPathSegCurvetoQuadraticAbs;
-}
-
-interface SVGPathSegCurvetoQuadraticRel extends SVGPathSeg {
-    x: number;
-    x1: number;
-    y: number;
-    y1: number;
-}
-
-declare var SVGPathSegCurvetoQuadraticRel: {
-    prototype: SVGPathSegCurvetoQuadraticRel;
-    new(): SVGPathSegCurvetoQuadraticRel;
-}
-
-interface SVGPathSegCurvetoQuadraticSmoothAbs extends SVGPathSeg {
-    x: number;
-    y: number;
-}
-
-declare var SVGPathSegCurvetoQuadraticSmoothAbs: {
-    prototype: SVGPathSegCurvetoQuadraticSmoothAbs;
-    new(): SVGPathSegCurvetoQuadraticSmoothAbs;
-}
-
-interface SVGPathSegCurvetoQuadraticSmoothRel extends SVGPathSeg {
-    x: number;
-    y: number;
-}
-
-declare var SVGPathSegCurvetoQuadraticSmoothRel: {
-    prototype: SVGPathSegCurvetoQuadraticSmoothRel;
-    new(): SVGPathSegCurvetoQuadraticSmoothRel;
-}
-
-interface SVGPathSegLinetoAbs extends SVGPathSeg {
-    x: number;
-    y: number;
-}
-
-declare var SVGPathSegLinetoAbs: {
-    prototype: SVGPathSegLinetoAbs;
-    new(): SVGPathSegLinetoAbs;
-}
-
-interface SVGPathSegLinetoHorizontalAbs extends SVGPathSeg {
-    x: number;
-}
-
-declare var SVGPathSegLinetoHorizontalAbs: {
-    prototype: SVGPathSegLinetoHorizontalAbs;
-    new(): SVGPathSegLinetoHorizontalAbs;
-}
-
-interface SVGPathSegLinetoHorizontalRel extends SVGPathSeg {
-    x: number;
-}
-
-declare var SVGPathSegLinetoHorizontalRel: {
-    prototype: SVGPathSegLinetoHorizontalRel;
-    new(): SVGPathSegLinetoHorizontalRel;
-}
-
-interface SVGPathSegLinetoRel extends SVGPathSeg {
-    x: number;
-    y: number;
-}
-
-declare var SVGPathSegLinetoRel: {
-    prototype: SVGPathSegLinetoRel;
-    new(): SVGPathSegLinetoRel;
-}
-
-interface SVGPathSegLinetoVerticalAbs extends SVGPathSeg {
-    y: number;
-}
-
-declare var SVGPathSegLinetoVerticalAbs: {
-    prototype: SVGPathSegLinetoVerticalAbs;
-    new(): SVGPathSegLinetoVerticalAbs;
-}
-
-interface SVGPathSegLinetoVerticalRel extends SVGPathSeg {
-    y: number;
-}
-
-declare var SVGPathSegLinetoVerticalRel: {
-    prototype: SVGPathSegLinetoVerticalRel;
-    new(): SVGPathSegLinetoVerticalRel;
-}
-
-interface SVGPathSegList {
-    readonly numberOfItems: number;
-    appendItem(newItem: SVGPathSeg): SVGPathSeg;
-    clear(): void;
-    getItem(index: number): SVGPathSeg;
-    initialize(newItem: SVGPathSeg): SVGPathSeg;
-    insertItemBefore(newItem: SVGPathSeg, index: number): SVGPathSeg;
-    removeItem(index: number): SVGPathSeg;
-    replaceItem(newItem: SVGPathSeg, index: number): SVGPathSeg;
-}
-
-declare var SVGPathSegList: {
-    prototype: SVGPathSegList;
-    new(): SVGPathSegList;
-}
-
-interface SVGPathSegMovetoAbs extends SVGPathSeg {
-    x: number;
-    y: number;
-}
-
-declare var SVGPathSegMovetoAbs: {
-    prototype: SVGPathSegMovetoAbs;
-    new(): SVGPathSegMovetoAbs;
-}
-
-interface SVGPathSegMovetoRel extends SVGPathSeg {
-    x: number;
-    y: number;
-}
-
-declare var SVGPathSegMovetoRel: {
-    prototype: SVGPathSegMovetoRel;
-    new(): SVGPathSegMovetoRel;
-}
-
-interface SVGPatternElement extends SVGElement, SVGStylable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGFitToViewBox, SVGURIReference, SVGUnitTypes {
-    readonly height: SVGAnimatedLength;
-    readonly patternContentUnits: SVGAnimatedEnumeration;
-    readonly patternTransform: SVGAnimatedTransformList;
-    readonly patternUnits: SVGAnimatedEnumeration;
-    readonly width: SVGAnimatedLength;
-    readonly x: SVGAnimatedLength;
-    readonly y: SVGAnimatedLength;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGPatternElement: {
-    prototype: SVGPatternElement;
-    new(): SVGPatternElement;
-}
-
-interface SVGPoint {
-    x: number;
-    y: number;
-    matrixTransform(matrix: SVGMatrix): SVGPoint;
-}
-
-declare var SVGPoint: {
-    prototype: SVGPoint;
-    new(): SVGPoint;
-}
-
-interface SVGPointList {
-    readonly numberOfItems: number;
-    appendItem(newItem: SVGPoint): SVGPoint;
-    clear(): void;
-    getItem(index: number): SVGPoint;
-    initialize(newItem: SVGPoint): SVGPoint;
-    insertItemBefore(newItem: SVGPoint, index: number): SVGPoint;
-    removeItem(index: number): SVGPoint;
-    replaceItem(newItem: SVGPoint, index: number): SVGPoint;
-}
-
-declare var SVGPointList: {
-    prototype: SVGPointList;
-    new(): SVGPointList;
-}
-
-interface SVGPolygonElement extends SVGElement, SVGStylable, SVGTransformable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGAnimatedPoints {
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGPolygonElement: {
-    prototype: SVGPolygonElement;
-    new(): SVGPolygonElement;
-}
-
-interface SVGPolylineElement extends SVGElement, SVGStylable, SVGTransformable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGAnimatedPoints {
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGPolylineElement: {
-    prototype: SVGPolylineElement;
-    new(): SVGPolylineElement;
-}
-
-interface SVGPreserveAspectRatio {
-    align: number;
-    meetOrSlice: number;
-    readonly SVG_MEETORSLICE_MEET: number;
-    readonly SVG_MEETORSLICE_SLICE: number;
-    readonly SVG_MEETORSLICE_UNKNOWN: number;
-    readonly SVG_PRESERVEASPECTRATIO_NONE: number;
-    readonly SVG_PRESERVEASPECTRATIO_UNKNOWN: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMAXYMAX: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMAXYMID: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMAXYMIN: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMIDYMAX: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMIDYMID: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMIDYMIN: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMINYMAX: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMINYMID: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMINYMIN: number;
-}
-
-declare var SVGPreserveAspectRatio: {
-    prototype: SVGPreserveAspectRatio;
-    new(): SVGPreserveAspectRatio;
-    readonly SVG_MEETORSLICE_MEET: number;
-    readonly SVG_MEETORSLICE_SLICE: number;
-    readonly SVG_MEETORSLICE_UNKNOWN: number;
-    readonly SVG_PRESERVEASPECTRATIO_NONE: number;
-    readonly SVG_PRESERVEASPECTRATIO_UNKNOWN: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMAXYMAX: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMAXYMID: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMAXYMIN: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMIDYMAX: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMIDYMID: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMIDYMIN: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMINYMAX: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMINYMID: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMINYMIN: number;
-}
-
-interface SVGRadialGradientElement extends SVGGradientElement {
-    readonly cx: SVGAnimatedLength;
-    readonly cy: SVGAnimatedLength;
-    readonly fx: SVGAnimatedLength;
-    readonly fy: SVGAnimatedLength;
-    readonly r: SVGAnimatedLength;
-}
-
-declare var SVGRadialGradientElement: {
-    prototype: SVGRadialGradientElement;
-    new(): SVGRadialGradientElement;
-}
-
-interface SVGRect {
-    height: number;
-    width: number;
-    x: number;
-    y: number;
-}
-
-declare var SVGRect: {
-    prototype: SVGRect;
-    new(): SVGRect;
-}
-
-interface SVGRectElement extends SVGElement, SVGStylable, SVGTransformable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired {
-    readonly height: SVGAnimatedLength;
-    readonly rx: SVGAnimatedLength;
-    readonly ry: SVGAnimatedLength;
-    readonly width: SVGAnimatedLength;
-    readonly x: SVGAnimatedLength;
-    readonly y: SVGAnimatedLength;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGRectElement: {
-    prototype: SVGRectElement;
-    new(): SVGRectElement;
-}
-
-interface SVGSVGElement extends SVGElement, DocumentEvent, SVGLocatable, SVGTests, SVGStylable, SVGLangSpace, SVGExternalResourcesRequired, SVGFitToViewBox, SVGZoomAndPan {
-    contentScriptType: string;
-    contentStyleType: string;
-    currentScale: number;
-    readonly currentTranslate: SVGPoint;
-    readonly height: SVGAnimatedLength;
-    onabort: (this: this, ev: Event) => any;
-    onerror: (this: this, ev: Event) => any;
-    onresize: (this: this, ev: UIEvent) => any;
-    onscroll: (this: this, ev: UIEvent) => any;
-    onunload: (this: this, ev: Event) => any;
-    onzoom: (this: this, ev: SVGZoomEvent) => any;
-    readonly pixelUnitToMillimeterX: number;
-    readonly pixelUnitToMillimeterY: number;
-    readonly screenPixelToMillimeterX: number;
-    readonly screenPixelToMillimeterY: number;
-    readonly viewport: SVGRect;
-    readonly width: SVGAnimatedLength;
-    readonly x: SVGAnimatedLength;
-    readonly y: SVGAnimatedLength;
-    checkEnclosure(element: SVGElement, rect: SVGRect): boolean;
-    checkIntersection(element: SVGElement, rect: SVGRect): boolean;
-    createSVGAngle(): SVGAngle;
-    createSVGLength(): SVGLength;
-    createSVGMatrix(): SVGMatrix;
-    createSVGNumber(): SVGNumber;
-    createSVGPoint(): SVGPoint;
-    createSVGRect(): SVGRect;
-    createSVGTransform(): SVGTransform;
-    createSVGTransformFromMatrix(matrix: SVGMatrix): SVGTransform;
-    deselectAll(): void;
-    forceRedraw(): void;
-    getComputedStyle(elt: Element, pseudoElt?: string): CSSStyleDeclaration;
-    getCurrentTime(): number;
-    getElementById(elementId: string): Element;
-    getEnclosureList(rect: SVGRect, referenceElement: SVGElement): NodeListOf<SVGCircleElement | SVGEllipseElement | SVGImageElement | SVGLineElement | SVGPathElement | SVGPolygonElement | SVGPolylineElement | SVGRectElement | SVGTextElement | SVGUseElement>;
-    getIntersectionList(rect: SVGRect, referenceElement: SVGElement): NodeListOf<SVGCircleElement | SVGEllipseElement | SVGImageElement | SVGLineElement | SVGPathElement | SVGPolygonElement | SVGPolylineElement | SVGRectElement | SVGTextElement | SVGUseElement>;
-    pauseAnimations(): void;
-    setCurrentTime(seconds: number): void;
-    suspendRedraw(maxWaitMilliseconds: number): number;
-    unpauseAnimations(): void;
-    unsuspendRedraw(suspendHandleID: number): void;
-    unsuspendRedrawAll(): void;
-    addEventListener(type: "MSGestureChange", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureDoubleTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureEnd", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureHold", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGotPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSInertiaStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSLostPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerCancel", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerDown", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerEnter", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerLeave", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerMove", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOut", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOver", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerUp", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "SVGAbort", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "SVGError", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "SVGUnload", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "SVGZoom", listener: (this: this, ev: SVGZoomEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ariarequest", listener: (this: this, ev: AriaRequestEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "click", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "command", listener: (this: this, ev: CommandEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dblclick", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "focusin", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "focusout", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "gotpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "lostpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousedown", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousemove", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseout", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseover", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseup", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointercancel", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerdown", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerenter", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerleave", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointermove", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerout", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerover", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerup", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "resize", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "scroll", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchcancel", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchend", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchmove", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchstart", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenerror", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "wheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGSVGElement: {
-    prototype: SVGSVGElement;
-    new(): SVGSVGElement;
-}
-
-interface SVGScriptElement extends SVGElement, SVGExternalResourcesRequired, SVGURIReference {
-    type: string;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGScriptElement: {
-    prototype: SVGScriptElement;
-    new(): SVGScriptElement;
-}
-
-interface SVGStopElement extends SVGElement, SVGStylable {
-    readonly offset: SVGAnimatedNumber;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGStopElement: {
-    prototype: SVGStopElement;
-    new(): SVGStopElement;
-}
-
-interface SVGStringList {
-    readonly numberOfItems: number;
-    appendItem(newItem: string): string;
-    clear(): void;
-    getItem(index: number): string;
-    initialize(newItem: string): string;
-    insertItemBefore(newItem: string, index: number): string;
-    removeItem(index: number): string;
-    replaceItem(newItem: string, index: number): string;
-}
-
-declare var SVGStringList: {
-    prototype: SVGStringList;
-    new(): SVGStringList;
-}
-
-interface SVGStyleElement extends SVGElement, SVGLangSpace {
-    disabled: boolean;
-    media: string;
-    title: string;
-    type: string;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGStyleElement: {
-    prototype: SVGStyleElement;
-    new(): SVGStyleElement;
-}
-
-interface SVGSwitchElement extends SVGElement, SVGStylable, SVGTransformable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired {
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGSwitchElement: {
-    prototype: SVGSwitchElement;
-    new(): SVGSwitchElement;
-}
-
-interface SVGSymbolElement extends SVGElement, SVGStylable, SVGLangSpace, SVGExternalResourcesRequired, SVGFitToViewBox {
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGSymbolElement: {
-    prototype: SVGSymbolElement;
-    new(): SVGSymbolElement;
-}
-
-interface SVGTSpanElement extends SVGTextPositioningElement {
-}
-
-declare var SVGTSpanElement: {
-    prototype: SVGTSpanElement;
-    new(): SVGTSpanElement;
-}
-
-interface SVGTextContentElement extends SVGElement, SVGStylable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired {
-    readonly lengthAdjust: SVGAnimatedEnumeration;
-    readonly textLength: SVGAnimatedLength;
-    getCharNumAtPosition(point: SVGPoint): number;
-    getComputedTextLength(): number;
-    getEndPositionOfChar(charnum: number): SVGPoint;
-    getExtentOfChar(charnum: number): SVGRect;
-    getNumberOfChars(): number;
-    getRotationOfChar(charnum: number): number;
-    getStartPositionOfChar(charnum: number): SVGPoint;
-    getSubStringLength(charnum: number, nchars: number): number;
-    selectSubString(charnum: number, nchars: number): void;
-    readonly LENGTHADJUST_SPACING: number;
-    readonly LENGTHADJUST_SPACINGANDGLYPHS: number;
-    readonly LENGTHADJUST_UNKNOWN: number;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGTextContentElement: {
-    prototype: SVGTextContentElement;
-    new(): SVGTextContentElement;
-    readonly LENGTHADJUST_SPACING: number;
-    readonly LENGTHADJUST_SPACINGANDGLYPHS: number;
-    readonly LENGTHADJUST_UNKNOWN: number;
-}
-
-interface SVGTextElement extends SVGTextPositioningElement, SVGTransformable {
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGTextElement: {
-    prototype: SVGTextElement;
-    new(): SVGTextElement;
-}
-
-interface SVGTextPathElement extends SVGTextContentElement, SVGURIReference {
-    readonly method: SVGAnimatedEnumeration;
-    readonly spacing: SVGAnimatedEnumeration;
-    readonly startOffset: SVGAnimatedLength;
-    readonly TEXTPATH_METHODTYPE_ALIGN: number;
-    readonly TEXTPATH_METHODTYPE_STRETCH: number;
-    readonly TEXTPATH_METHODTYPE_UNKNOWN: number;
-    readonly TEXTPATH_SPACINGTYPE_AUTO: number;
-    readonly TEXTPATH_SPACINGTYPE_EXACT: number;
-    readonly TEXTPATH_SPACINGTYPE_UNKNOWN: number;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGTextPathElement: {
-    prototype: SVGTextPathElement;
-    new(): SVGTextPathElement;
-    readonly TEXTPATH_METHODTYPE_ALIGN: number;
-    readonly TEXTPATH_METHODTYPE_STRETCH: number;
-    readonly TEXTPATH_METHODTYPE_UNKNOWN: number;
-    readonly TEXTPATH_SPACINGTYPE_AUTO: number;
-    readonly TEXTPATH_SPACINGTYPE_EXACT: number;
-    readonly TEXTPATH_SPACINGTYPE_UNKNOWN: number;
-}
-
-interface SVGTextPositioningElement extends SVGTextContentElement {
-    readonly dx: SVGAnimatedLengthList;
-    readonly dy: SVGAnimatedLengthList;
-    readonly rotate: SVGAnimatedNumberList;
-    readonly x: SVGAnimatedLengthList;
-    readonly y: SVGAnimatedLengthList;
-}
-
-declare var SVGTextPositioningElement: {
-    prototype: SVGTextPositioningElement;
-    new(): SVGTextPositioningElement;
-}
-
-interface SVGTitleElement extends SVGElement, SVGStylable, SVGLangSpace {
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGTitleElement: {
-    prototype: SVGTitleElement;
-    new(): SVGTitleElement;
-}
-
-interface SVGTransform {
-    readonly angle: number;
-    readonly matrix: SVGMatrix;
-    readonly type: number;
-    setMatrix(matrix: SVGMatrix): void;
-    setRotate(angle: number, cx: number, cy: number): void;
-    setScale(sx: number, sy: number): void;
-    setSkewX(angle: number): void;
-    setSkewY(angle: number): void;
-    setTranslate(tx: number, ty: number): void;
-    readonly SVG_TRANSFORM_MATRIX: number;
-    readonly SVG_TRANSFORM_ROTATE: number;
-    readonly SVG_TRANSFORM_SCALE: number;
-    readonly SVG_TRANSFORM_SKEWX: number;
-    readonly SVG_TRANSFORM_SKEWY: number;
-    readonly SVG_TRANSFORM_TRANSLATE: number;
-    readonly SVG_TRANSFORM_UNKNOWN: number;
-}
-
-declare var SVGTransform: {
-    prototype: SVGTransform;
-    new(): SVGTransform;
-    readonly SVG_TRANSFORM_MATRIX: number;
-    readonly SVG_TRANSFORM_ROTATE: number;
-    readonly SVG_TRANSFORM_SCALE: number;
-    readonly SVG_TRANSFORM_SKEWX: number;
-    readonly SVG_TRANSFORM_SKEWY: number;
-    readonly SVG_TRANSFORM_TRANSLATE: number;
-    readonly SVG_TRANSFORM_UNKNOWN: number;
-}
-
-interface SVGTransformList {
-    readonly numberOfItems: number;
-    appendItem(newItem: SVGTransform): SVGTransform;
-    clear(): void;
-    consolidate(): SVGTransform;
-    createSVGTransformFromMatrix(matrix: SVGMatrix): SVGTransform;
-    getItem(index: number): SVGTransform;
-    initialize(newItem: SVGTransform): SVGTransform;
-    insertItemBefore(newItem: SVGTransform, index: number): SVGTransform;
-    removeItem(index: number): SVGTransform;
-    replaceItem(newItem: SVGTransform, index: number): SVGTransform;
-}
-
-declare var SVGTransformList: {
-    prototype: SVGTransformList;
-    new(): SVGTransformList;
-}
-
-interface SVGUnitTypes {
-    readonly SVG_UNIT_TYPE_OBJECTBOUNDINGBOX: number;
-    readonly SVG_UNIT_TYPE_UNKNOWN: number;
-    readonly SVG_UNIT_TYPE_USERSPACEONUSE: number;
-}
-declare var SVGUnitTypes: SVGUnitTypes;
-
-interface SVGUseElement extends SVGElement, SVGStylable, SVGTransformable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGURIReference {
-    readonly animatedInstanceRoot: SVGElementInstance;
-    readonly height: SVGAnimatedLength;
-    readonly instanceRoot: SVGElementInstance;
-    readonly width: SVGAnimatedLength;
-    readonly x: SVGAnimatedLength;
-    readonly y: SVGAnimatedLength;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGUseElement: {
-    prototype: SVGUseElement;
-    new(): SVGUseElement;
-}
-
-interface SVGViewElement extends SVGElement, SVGExternalResourcesRequired, SVGFitToViewBox, SVGZoomAndPan {
-    readonly viewTarget: SVGStringList;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGViewElement: {
-    prototype: SVGViewElement;
-    new(): SVGViewElement;
-}
-
-interface SVGZoomAndPan {
-    readonly zoomAndPan: number;
-}
-
-declare var SVGZoomAndPan: {
-    readonly SVG_ZOOMANDPAN_DISABLE: number;
-    readonly SVG_ZOOMANDPAN_MAGNIFY: number;
-    readonly SVG_ZOOMANDPAN_UNKNOWN: number;
-}
-
-interface SVGZoomEvent extends UIEvent {
-    readonly newScale: number;
-    readonly newTranslate: SVGPoint;
-    readonly previousScale: number;
-    readonly previousTranslate: SVGPoint;
-    readonly zoomRectScreen: SVGRect;
-}
-
-declare var SVGZoomEvent: {
-    prototype: SVGZoomEvent;
-    new(): SVGZoomEvent;
-}
-
-interface Screen extends EventTarget {
-    readonly availHeight: number;
-    readonly availWidth: number;
-    bufferDepth: number;
-    readonly colorDepth: number;
-    readonly deviceXDPI: number;
-    readonly deviceYDPI: number;
-    readonly fontSmoothingEnabled: boolean;
-    readonly height: number;
-    readonly logicalXDPI: number;
-    readonly logicalYDPI: number;
-    readonly msOrientation: string;
-    onmsorientationchange: (this: this, ev: Event) => any;
-    readonly pixelDepth: number;
-    readonly systemXDPI: number;
-    readonly systemYDPI: number;
-    readonly width: number;
-    msLockOrientation(orientations: string | string[]): boolean;
-    msUnlockOrientation(): void;
-    addEventListener(type: "MSOrientationChange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var Screen: {
-    prototype: Screen;
-    new(): Screen;
-}
-
-interface ScriptNotifyEvent extends Event {
-    readonly callingUri: string;
-    readonly value: string;
-}
-
-declare var ScriptNotifyEvent: {
-    prototype: ScriptNotifyEvent;
-    new(): ScriptNotifyEvent;
-}
-
-interface ScriptProcessorNode extends AudioNode {
-    readonly bufferSize: number;
-    onaudioprocess: (this: this, ev: AudioProcessingEvent) => any;
-    addEventListener(type: "audioprocess", listener: (this: this, ev: AudioProcessingEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var ScriptProcessorNode: {
-    prototype: ScriptProcessorNode;
-    new(): ScriptProcessorNode;
-}
-
-interface Selection {
-    readonly anchorNode: Node;
-    readonly anchorOffset: number;
-    readonly focusNode: Node;
-    readonly focusOffset: number;
-    readonly isCollapsed: boolean;
-    readonly rangeCount: number;
-    readonly type: string;
-    addRange(range: Range): void;
-    collapse(parentNode: Node, offset: number): void;
-    collapseToEnd(): void;
-    collapseToStart(): void;
-    containsNode(node: Node, partlyContained: boolean): boolean;
-    deleteFromDocument(): void;
-    empty(): void;
-    extend(newNode: Node, offset: number): void;
-    getRangeAt(index: number): Range;
-    removeAllRanges(): void;
-    removeRange(range: Range): void;
-    selectAllChildren(parentNode: Node): void;
-    setBaseAndExtent(baseNode: Node, baseOffset: number, extentNode: Node, extentOffset: number): void;
-    toString(): string;
-}
-
-declare var Selection: {
-    prototype: Selection;
-    new(): Selection;
-}
-
-interface SourceBuffer extends EventTarget {
-    appendWindowEnd: number;
-    appendWindowStart: number;
-    readonly audioTracks: AudioTrackList;
-    readonly buffered: TimeRanges;
-    mode: string;
-    timestampOffset: number;
-    readonly updating: boolean;
-    readonly videoTracks: VideoTrackList;
-    abort(): void;
-    appendBuffer(data: ArrayBuffer | ArrayBufferView): void;
-    appendStream(stream: MSStream, maxSize?: number): void;
-    remove(start: number, end: number): void;
-}
-
-declare var SourceBuffer: {
-    prototype: SourceBuffer;
-    new(): SourceBuffer;
-}
-
-interface SourceBufferList extends EventTarget {
-    readonly length: number;
-    item(index: number): SourceBuffer;
-    [index: number]: SourceBuffer;
-}
-
-declare var SourceBufferList: {
-    prototype: SourceBufferList;
-    new(): SourceBufferList;
-}
-
-interface StereoPannerNode extends AudioNode {
-    readonly pan: AudioParam;
-}
-
-declare var StereoPannerNode: {
-    prototype: StereoPannerNode;
-    new(): StereoPannerNode;
-}
-
-interface Storage {
-    readonly length: number;
-    clear(): void;
-    getItem(key: string): string | null;
-    key(index: number): string | null;
-    removeItem(key: string): void;
-    setItem(key: string, data: string): void;
-    [key: string]: any;
-    [index: number]: string;
-}
-
-declare var Storage: {
-    prototype: Storage;
-    new(): Storage;
-}
-
-interface StorageEvent extends Event {
-    readonly url: string;
-    key?: string;
-    oldValue?: string;
-    newValue?: string;
-    storageArea?: Storage;
-}
-
-declare var StorageEvent: {
-    prototype: StorageEvent;
-    new (type: string, eventInitDict?: StorageEventInit): StorageEvent;
-}
-
-interface StyleMedia {
-    readonly type: string;
-    matchMedium(mediaquery: string): boolean;
-}
-
-declare var StyleMedia: {
-    prototype: StyleMedia;
-    new(): StyleMedia;
-}
-
-interface StyleSheet {
-    disabled: boolean;
-    readonly href: string;
-    readonly media: MediaList;
-    readonly ownerNode: Node;
-    readonly parentStyleSheet: StyleSheet;
-    readonly title: string;
-    readonly type: string;
-}
-
-declare var StyleSheet: {
-    prototype: StyleSheet;
-    new(): StyleSheet;
-}
-
-interface StyleSheetList {
-    readonly length: number;
-    item(index?: number): StyleSheet;
-    [index: number]: StyleSheet;
-}
-
-declare var StyleSheetList: {
-    prototype: StyleSheetList;
-    new(): StyleSheetList;
-}
-
-interface StyleSheetPageList {
-    readonly length: number;
-    item(index: number): CSSPageRule;
-    [index: number]: CSSPageRule;
-}
-
-declare var StyleSheetPageList: {
-    prototype: StyleSheetPageList;
-    new(): StyleSheetPageList;
-}
-
-interface SubtleCrypto {
-    decrypt(algorithm: string | RsaOaepParams | AesCtrParams | AesCbcParams | AesCmacParams | AesGcmParams | AesCfbParams, key: CryptoKey, data: BufferSource): PromiseLike<ArrayBuffer>;
-    deriveBits(algorithm: string | EcdhKeyDeriveParams | DhKeyDeriveParams | ConcatParams | HkdfCtrParams | Pbkdf2Params, baseKey: CryptoKey, length: number): PromiseLike<ArrayBuffer>;
-    deriveKey(algorithm: string | EcdhKeyDeriveParams | DhKeyDeriveParams | ConcatParams | HkdfCtrParams | Pbkdf2Params, baseKey: CryptoKey, derivedKeyType: string | AesDerivedKeyParams | HmacImportParams | ConcatParams | HkdfCtrParams | Pbkdf2Params, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
-    digest(algorithm: AlgorithmIdentifier, data: BufferSource): PromiseLike<ArrayBuffer>;
-    encrypt(algorithm: string | RsaOaepParams | AesCtrParams | AesCbcParams | AesCmacParams | AesGcmParams | AesCfbParams, key: CryptoKey, data: BufferSource): PromiseLike<ArrayBuffer>;
-    exportKey(format: "jwk", key: CryptoKey): PromiseLike<JsonWebKey>;
-    exportKey(format: "raw" | "pkcs8" | "spki", key: CryptoKey): PromiseLike<ArrayBuffer>;
-    exportKey(format: string, key: CryptoKey): PromiseLike<JsonWebKey | ArrayBuffer>;
-    generateKey(algorithm: string, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKeyPair | CryptoKey>;
-    generateKey(algorithm: RsaHashedKeyGenParams | EcKeyGenParams | DhKeyGenParams, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKeyPair>;
-    generateKey(algorithm: AesKeyGenParams | HmacKeyGenParams | Pbkdf2Params, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
-    importKey(format: "jwk", keyData: JsonWebKey, algorithm: string | RsaHashedImportParams | EcKeyImportParams | HmacImportParams | DhImportKeyParams, extractable:boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
-    importKey(format: "raw" | "pkcs8" | "spki", keyData: BufferSource, algorithm: string | RsaHashedImportParams | EcKeyImportParams | HmacImportParams | DhImportKeyParams, extractable:boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
-    importKey(format: string, keyData: JsonWebKey | BufferSource, algorithm: string | RsaHashedImportParams | EcKeyImportParams | HmacImportParams | DhImportKeyParams, extractable:boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
-    sign(algorithm: string | RsaPssParams | EcdsaParams | AesCmacParams, key: CryptoKey, data: BufferSource): PromiseLike<ArrayBuffer>;
-    unwrapKey(format: string, wrappedKey: BufferSource, unwrappingKey: CryptoKey, unwrapAlgorithm: AlgorithmIdentifier, unwrappedKeyAlgorithm: AlgorithmIdentifier, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
-    verify(algorithm: string | RsaPssParams | EcdsaParams | AesCmacParams, key: CryptoKey, signature: BufferSource, data: BufferSource): PromiseLike<boolean>;
-    wrapKey(format: string, key: CryptoKey, wrappingKey: CryptoKey, wrapAlgorithm: AlgorithmIdentifier): PromiseLike<ArrayBuffer>;
-}
-
-declare var SubtleCrypto: {
-    prototype: SubtleCrypto;
-    new(): SubtleCrypto;
-}
-
-interface Text extends CharacterData {
-    readonly wholeText: string;
-    splitText(offset: number): Text;
-}
-
-declare var Text: {
-    prototype: Text;
-    new(): Text;
-}
-
-interface TextEvent extends UIEvent {
-    readonly data: string;
-    readonly inputMethod: number;
-    readonly locale: string;
-    initTextEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, dataArg: string, inputMethod: number, locale: string): void;
-    readonly DOM_INPUT_METHOD_DROP: number;
-    readonly DOM_INPUT_METHOD_HANDWRITING: number;
-    readonly DOM_INPUT_METHOD_IME: number;
-    readonly DOM_INPUT_METHOD_KEYBOARD: number;
-    readonly DOM_INPUT_METHOD_MULTIMODAL: number;
-    readonly DOM_INPUT_METHOD_OPTION: number;
-    readonly DOM_INPUT_METHOD_PASTE: number;
-    readonly DOM_INPUT_METHOD_SCRIPT: number;
-    readonly DOM_INPUT_METHOD_UNKNOWN: number;
-    readonly DOM_INPUT_METHOD_VOICE: number;
-}
-
-declare var TextEvent: {
-    prototype: TextEvent;
-    new(): TextEvent;
-    readonly DOM_INPUT_METHOD_DROP: number;
-    readonly DOM_INPUT_METHOD_HANDWRITING: number;
-    readonly DOM_INPUT_METHOD_IME: number;
-    readonly DOM_INPUT_METHOD_KEYBOARD: number;
-    readonly DOM_INPUT_METHOD_MULTIMODAL: number;
-    readonly DOM_INPUT_METHOD_OPTION: number;
-    readonly DOM_INPUT_METHOD_PASTE: number;
-    readonly DOM_INPUT_METHOD_SCRIPT: number;
-    readonly DOM_INPUT_METHOD_UNKNOWN: number;
-    readonly DOM_INPUT_METHOD_VOICE: number;
-}
-
-interface TextMetrics {
-    readonly width: number;
-}
-
-declare var TextMetrics: {
-    prototype: TextMetrics;
-    new(): TextMetrics;
-}
-
-interface TextTrack extends EventTarget {
-    readonly activeCues: TextTrackCueList;
-    readonly cues: TextTrackCueList;
-    readonly inBandMetadataTrackDispatchType: string;
-    readonly kind: string;
-    readonly label: string;
-    readonly language: string;
-    mode: any;
-    oncuechange: (this: this, ev: Event) => any;
-    onerror: (this: this, ev: ErrorEvent) => any;
-    onload: (this: this, ev: Event) => any;
-    readonly readyState: number;
-    addCue(cue: TextTrackCue): void;
-    removeCue(cue: TextTrackCue): void;
-    readonly DISABLED: number;
-    readonly ERROR: number;
-    readonly HIDDEN: number;
-    readonly LOADED: number;
-    readonly LOADING: number;
-    readonly NONE: number;
-    readonly SHOWING: number;
-    addEventListener(type: "cuechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var TextTrack: {
-    prototype: TextTrack;
-    new(): TextTrack;
-    readonly DISABLED: number;
-    readonly ERROR: number;
-    readonly HIDDEN: number;
-    readonly LOADED: number;
-    readonly LOADING: number;
-    readonly NONE: number;
-    readonly SHOWING: number;
-}
-
-interface TextTrackCue extends EventTarget {
-    endTime: number;
-    id: string;
-    onenter: (this: this, ev: Event) => any;
-    onexit: (this: this, ev: Event) => any;
-    pauseOnExit: boolean;
-    startTime: number;
-    text: string;
-    readonly track: TextTrack;
-    getCueAsHTML(): DocumentFragment;
-    addEventListener(type: "enter", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "exit", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var TextTrackCue: {
-    prototype: TextTrackCue;
-    new(startTime: number, endTime: number, text: string): TextTrackCue;
-}
-
-interface TextTrackCueList {
-    readonly length: number;
-    getCueById(id: string): TextTrackCue;
-    item(index: number): TextTrackCue;
-    [index: number]: TextTrackCue;
-}
-
-declare var TextTrackCueList: {
-    prototype: TextTrackCueList;
-    new(): TextTrackCueList;
-}
-
-interface TextTrackList extends EventTarget {
-    readonly length: number;
-    onaddtrack: ((this: this, ev: TrackEvent) => any) | null;
-    item(index: number): TextTrack;
-    addEventListener(type: "addtrack", listener: (this: this, ev: TrackEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-    [index: number]: TextTrack;
-}
-
-declare var TextTrackList: {
-    prototype: TextTrackList;
-    new(): TextTrackList;
-}
-
-interface TimeRanges {
-    readonly length: number;
-    end(index: number): number;
-    start(index: number): number;
-}
-
-declare var TimeRanges: {
-    prototype: TimeRanges;
-    new(): TimeRanges;
-}
-
-interface Touch {
-    readonly clientX: number;
-    readonly clientY: number;
-    readonly identifier: number;
-    readonly pageX: number;
-    readonly pageY: number;
-    readonly screenX: number;
-    readonly screenY: number;
-    readonly target: EventTarget;
-}
-
-declare var Touch: {
-    prototype: Touch;
-    new(): Touch;
-}
-
-interface TouchEvent extends UIEvent {
-    readonly altKey: boolean;
-    readonly changedTouches: TouchList;
-    readonly ctrlKey: boolean;
-    readonly metaKey: boolean;
-    readonly shiftKey: boolean;
-    readonly targetTouches: TouchList;
-    readonly touches: TouchList;
-}
-
-declare var TouchEvent: {
-    prototype: TouchEvent;
-    new(): TouchEvent;
-}
-
-interface TouchList {
-    readonly length: number;
-    item(index: number): Touch | null;
-    [index: number]: Touch;
-}
-
-declare var TouchList: {
-    prototype: TouchList;
-    new(): TouchList;
-}
-
-interface TrackEvent extends Event {
-    readonly track: any;
-}
-
-declare var TrackEvent: {
-    prototype: TrackEvent;
-    new(): TrackEvent;
-}
-
-interface TransitionEvent extends Event {
-    readonly elapsedTime: number;
-    readonly propertyName: string;
-    initTransitionEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, propertyNameArg: string, elapsedTimeArg: number): void;
-}
-
-declare var TransitionEvent: {
-    prototype: TransitionEvent;
-    new(): TransitionEvent;
-}
-
-interface TreeWalker {
-    currentNode: Node;
-    readonly expandEntityReferences: boolean;
-    readonly filter: NodeFilter;
-    readonly root: Node;
-    readonly whatToShow: number;
-    firstChild(): Node;
-    lastChild(): Node;
-    nextNode(): Node;
-    nextSibling(): Node;
-    parentNode(): Node;
-    previousNode(): Node;
-    previousSibling(): Node;
-}
-
-declare var TreeWalker: {
-    prototype: TreeWalker;
-    new(): TreeWalker;
-}
-
-interface UIEvent extends Event {
-    readonly detail: number;
-    readonly view: Window;
-    initUIEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number): void;
-}
-
-declare var UIEvent: {
-    prototype: UIEvent;
-    new(type: string, eventInitDict?: UIEventInit): UIEvent;
-}
-
-interface URL {
-    hash: string;
-    host: string;
-    hostname: string;
-    href: string;
-    readonly origin: string;
-    password: string;
-    pathname: string;
-    port: string;
-    protocol: string;
-    search: string;
-    username: string;
-    toString(): string;
-}
-
-declare var URL: {
-    prototype: URL;
-    new(url: string, base?: string): URL;
-    createObjectURL(object: any, options?: ObjectURLOptions): string;
-    revokeObjectURL(url: string): void;
-}
-
-interface UnviewableContentIdentifiedEvent extends NavigationEventWithReferrer {
-    readonly mediaType: string;
-}
-
-declare var UnviewableContentIdentifiedEvent: {
-    prototype: UnviewableContentIdentifiedEvent;
-    new(): UnviewableContentIdentifiedEvent;
-}
-
-interface ValidityState {
-    readonly badInput: boolean;
-    readonly customError: boolean;
-    readonly patternMismatch: boolean;
-    readonly rangeOverflow: boolean;
-    readonly rangeUnderflow: boolean;
-    readonly stepMismatch: boolean;
-    readonly tooLong: boolean;
-    readonly typeMismatch: boolean;
-    readonly valid: boolean;
-    readonly valueMissing: boolean;
-}
-
-declare var ValidityState: {
-    prototype: ValidityState;
-    new(): ValidityState;
-}
-
-interface VideoPlaybackQuality {
-    readonly corruptedVideoFrames: number;
-    readonly creationTime: number;
-    readonly droppedVideoFrames: number;
-    readonly totalFrameDelay: number;
-    readonly totalVideoFrames: number;
-}
-
-declare var VideoPlaybackQuality: {
-    prototype: VideoPlaybackQuality;
-    new(): VideoPlaybackQuality;
-}
-
-interface VideoTrack {
-    readonly id: string;
-    kind: string;
-    readonly label: string;
-    language: string;
-    selected: boolean;
-    readonly sourceBuffer: SourceBuffer;
-}
-
-declare var VideoTrack: {
-    prototype: VideoTrack;
-    new(): VideoTrack;
-}
-
-interface VideoTrackList extends EventTarget {
-    readonly length: number;
-    onaddtrack: (this: this, ev: TrackEvent) => any;
-    onchange: (this: this, ev: Event) => any;
-    onremovetrack: (this: this, ev: TrackEvent) => any;
-    readonly selectedIndex: number;
-    getTrackById(id: string): VideoTrack | null;
-    item(index: number): VideoTrack;
-    addEventListener(type: "addtrack", listener: (this: this, ev: TrackEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "change", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "removetrack", listener: (this: this, ev: TrackEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-    [index: number]: VideoTrack;
-}
-
-declare var VideoTrackList: {
-    prototype: VideoTrackList;
-    new(): VideoTrackList;
-}
-
-interface WEBGL_compressed_texture_s3tc {
-    readonly COMPRESSED_RGBA_S3TC_DXT1_EXT: number;
-    readonly COMPRESSED_RGBA_S3TC_DXT3_EXT: number;
-    readonly COMPRESSED_RGBA_S3TC_DXT5_EXT: number;
-    readonly COMPRESSED_RGB_S3TC_DXT1_EXT: number;
-}
-
-declare var WEBGL_compressed_texture_s3tc: {
-    prototype: WEBGL_compressed_texture_s3tc;
-    new(): WEBGL_compressed_texture_s3tc;
-    readonly COMPRESSED_RGBA_S3TC_DXT1_EXT: number;
-    readonly COMPRESSED_RGBA_S3TC_DXT3_EXT: number;
-    readonly COMPRESSED_RGBA_S3TC_DXT5_EXT: number;
-    readonly COMPRESSED_RGB_S3TC_DXT1_EXT: number;
-}
-
-interface WEBGL_debug_renderer_info {
-    readonly UNMASKED_RENDERER_WEBGL: number;
-    readonly UNMASKED_VENDOR_WEBGL: number;
-}
-
-declare var WEBGL_debug_renderer_info: {
-    prototype: WEBGL_debug_renderer_info;
-    new(): WEBGL_debug_renderer_info;
-    readonly UNMASKED_RENDERER_WEBGL: number;
-    readonly UNMASKED_VENDOR_WEBGL: number;
-}
-
-interface WEBGL_depth_texture {
-    readonly UNSIGNED_INT_24_8_WEBGL: number;
-}
-
-declare var WEBGL_depth_texture: {
-    prototype: WEBGL_depth_texture;
-    new(): WEBGL_depth_texture;
-    readonly UNSIGNED_INT_24_8_WEBGL: number;
-}
-
-interface WaveShaperNode extends AudioNode {
-    curve: Float32Array | null;
-    oversample: string;
-}
-
-declare var WaveShaperNode: {
-    prototype: WaveShaperNode;
-    new(): WaveShaperNode;
-}
-
-interface WebGLActiveInfo {
-    readonly name: string;
-    readonly size: number;
-    readonly type: number;
-}
-
-declare var WebGLActiveInfo: {
-    prototype: WebGLActiveInfo;
-    new(): WebGLActiveInfo;
-}
-
-interface WebGLBuffer extends WebGLObject {
-}
-
-declare var WebGLBuffer: {
-    prototype: WebGLBuffer;
-    new(): WebGLBuffer;
-}
-
-interface WebGLContextEvent extends Event {
-    readonly statusMessage: string;
-}
-
-declare var WebGLContextEvent: {
-    prototype: WebGLContextEvent;
-    new(type: string, eventInitDict?: WebGLContextEventInit): WebGLContextEvent;
-}
-
-interface WebGLFramebuffer extends WebGLObject {
-}
-
-declare var WebGLFramebuffer: {
-    prototype: WebGLFramebuffer;
-    new(): WebGLFramebuffer;
-}
-
-interface WebGLObject {
-}
-
-declare var WebGLObject: {
-    prototype: WebGLObject;
-    new(): WebGLObject;
-}
-
-interface WebGLProgram extends WebGLObject {
-}
-
-declare var WebGLProgram: {
-    prototype: WebGLProgram;
-    new(): WebGLProgram;
-}
-
-interface WebGLRenderbuffer extends WebGLObject {
-}
-
-declare var WebGLRenderbuffer: {
-    prototype: WebGLRenderbuffer;
-    new(): WebGLRenderbuffer;
-}
-
-interface WebGLRenderingContext {
-    readonly canvas: HTMLCanvasElement;
-    readonly drawingBufferHeight: number;
-    readonly drawingBufferWidth: number;
-    activeTexture(texture: number): void;
-    attachShader(program: WebGLProgram | null, shader: WebGLShader | null): void;
-    bindAttribLocation(program: WebGLProgram | null, index: number, name: string): void;
-    bindBuffer(target: number, buffer: WebGLBuffer | null): void;
-    bindFramebuffer(target: number, framebuffer: WebGLFramebuffer | null): void;
-    bindRenderbuffer(target: number, renderbuffer: WebGLRenderbuffer | null): void;
-    bindTexture(target: number, texture: WebGLTexture | null): void;
-    blendColor(red: number, green: number, blue: number, alpha: number): void;
-    blendEquation(mode: number): void;
-    blendEquationSeparate(modeRGB: number, modeAlpha: number): void;
-    blendFunc(sfactor: number, dfactor: number): void;
-    blendFuncSeparate(srcRGB: number, dstRGB: number, srcAlpha: number, dstAlpha: number): void;
-    bufferData(target: number, size: number | ArrayBufferView | ArrayBuffer, usage: number): void;
-    bufferSubData(target: number, offset: number, data: ArrayBufferView | ArrayBuffer): void;
-    checkFramebufferStatus(target: number): number;
-    clear(mask: number): void;
-    clearColor(red: number, green: number, blue: number, alpha: number): void;
-    clearDepth(depth: number): void;
-    clearStencil(s: number): void;
-    colorMask(red: boolean, green: boolean, blue: boolean, alpha: boolean): void;
-    compileShader(shader: WebGLShader | null): void;
-    compressedTexImage2D(target: number, level: number, internalformat: number, width: number, height: number, border: number, data: ArrayBufferView): void;
-    compressedTexSubImage2D(target: number, level: number, xoffset: number, yoffset: number, width: number, height: number, format: number, data: ArrayBufferView): void;
-    copyTexImage2D(target: number, level: number, internalformat: number, x: number, y: number, width: number, height: number, border: number): void;
-    copyTexSubImage2D(target: number, level: number, xoffset: number, yoffset: number, x: number, y: number, width: number, height: number): void;
-    createBuffer(): WebGLBuffer | null;
-    createFramebuffer(): WebGLFramebuffer | null;
-    createProgram(): WebGLProgram | null;
-    createRenderbuffer(): WebGLRenderbuffer | null;
-    createShader(type: number): WebGLShader | null;
-    createTexture(): WebGLTexture | null;
-    cullFace(mode: number): void;
-    deleteBuffer(buffer: WebGLBuffer | null): void;
-    deleteFramebuffer(framebuffer: WebGLFramebuffer | null): void;
-    deleteProgram(program: WebGLProgram | null): void;
-    deleteRenderbuffer(renderbuffer: WebGLRenderbuffer | null): void;
-    deleteShader(shader: WebGLShader | null): void;
-    deleteTexture(texture: WebGLTexture | null): void;
-    depthFunc(func: number): void;
-    depthMask(flag: boolean): void;
-    depthRange(zNear: number, zFar: number): void;
-    detachShader(program: WebGLProgram | null, shader: WebGLShader | null): void;
-    disable(cap: number): void;
-    disableVertexAttribArray(index: number): void;
-    drawArrays(mode: number, first: number, count: number): void;
-    drawElements(mode: number, count: number, type: number, offset: number): void;
-    enable(cap: number): void;
-    enableVertexAttribArray(index: number): void;
-    finish(): void;
-    flush(): void;
-    framebufferRenderbuffer(target: number, attachment: number, renderbuffertarget: number, renderbuffer: WebGLRenderbuffer | null): void;
-    framebufferTexture2D(target: number, attachment: number, textarget: number, texture: WebGLTexture | null, level: number): void;
-    frontFace(mode: number): void;
-    generateMipmap(target: number): void;
-    getActiveAttrib(program: WebGLProgram | null, index: number): WebGLActiveInfo | null;
-    getActiveUniform(program: WebGLProgram | null, index: number): WebGLActiveInfo | null;
-    getAttachedShaders(program: WebGLProgram | null): WebGLShader[] | null;
-    getAttribLocation(program: WebGLProgram | null, name: string): number;
-    getBufferParameter(target: number, pname: number): any;
-    getContextAttributes(): WebGLContextAttributes;
-    getError(): number;
-    getExtension(name: string): any;
-    getFramebufferAttachmentParameter(target: number, attachment: number, pname: number): any;
-    getParameter(pname: number): any;
-    getProgramInfoLog(program: WebGLProgram | null): string | null;
-    getProgramParameter(program: WebGLProgram | null, pname: number): any;
-    getRenderbufferParameter(target: number, pname: number): any;
-    getShaderInfoLog(shader: WebGLShader | null): string | null;
-    getShaderParameter(shader: WebGLShader | null, pname: number): any;
-    getShaderPrecisionFormat(shadertype: number, precisiontype: number): WebGLShaderPrecisionFormat | null;
-    getShaderSource(shader: WebGLShader | null): string | null;
-    getSupportedExtensions(): string[] | null;
-    getTexParameter(target: number, pname: number): any;
-    getUniform(program: WebGLProgram | null, location: WebGLUniformLocation | null): any;
-    getUniformLocation(program: WebGLProgram | null, name: string): WebGLUniformLocation | null;
-    getVertexAttrib(index: number, pname: number): any;
-    getVertexAttribOffset(index: number, pname: number): number;
-    hint(target: number, mode: number): void;
-    isBuffer(buffer: WebGLBuffer | null): boolean;
-    isContextLost(): boolean;
-    isEnabled(cap: number): boolean;
-    isFramebuffer(framebuffer: WebGLFramebuffer | null): boolean;
-    isProgram(program: WebGLProgram | null): boolean;
-    isRenderbuffer(renderbuffer: WebGLRenderbuffer | null): boolean;
-    isShader(shader: WebGLShader | null): boolean;
-    isTexture(texture: WebGLTexture | null): boolean;
-    lineWidth(width: number): void;
-    linkProgram(program: WebGLProgram | null): void;
-    pixelStorei(pname: number, param: number): void;
-    polygonOffset(factor: number, units: number): void;
-    readPixels(x: number, y: number, width: number, height: number, format: number, type: number, pixels: ArrayBufferView | null): void;
-    renderbufferStorage(target: number, internalformat: number, width: number, height: number): void;
-    sampleCoverage(value: number, invert: boolean): void;
-    scissor(x: number, y: number, width: number, height: number): void;
-    shaderSource(shader: WebGLShader | null, source: string): void;
-    stencilFunc(func: number, ref: number, mask: number): void;
-    stencilFuncSeparate(face: number, func: number, ref: number, mask: number): void;
-    stencilMask(mask: number): void;
-    stencilMaskSeparate(face: number, mask: number): void;
-    stencilOp(fail: number, zfail: number, zpass: number): void;
-    stencilOpSeparate(face: number, fail: number, zfail: number, zpass: number): void;
-    texImage2D(target: number, level: number, internalformat: number, width: number, height: number, border: number, format: number, type: number, pixels?: ArrayBufferView): void;
-    texImage2D(target: number, level: number, internalformat: number, format: number, type: number, pixels?: ImageData | HTMLVideoElement | HTMLImageElement | HTMLCanvasElement): void;
-    texParameterf(target: number, pname: number, param: number): void;
-    texParameteri(target: number, pname: number, param: number): void;
-    texSubImage2D(target: number, level: number, xoffset: number, yoffset: number, width: number, height: number, format: number, type: number, pixels?: ArrayBufferView): void;
-    texSubImage2D(target: number, level: number, xoffset: number, yoffset: number, format: number, type: number, pixels?: ImageData | HTMLVideoElement | HTMLImageElement | HTMLCanvasElement): void;
-    uniform1f(location: WebGLUniformLocation | null, x: number): void;
-    uniform1fv(location: WebGLUniformLocation, v: Float32Array | number[]): void;
-    uniform1i(location: WebGLUniformLocation | null, x: number): void;
-    uniform1iv(location: WebGLUniformLocation, v: Int32Array | number[]): void;
-    uniform2f(location: WebGLUniformLocation | null, x: number, y: number): void;
-    uniform2fv(location: WebGLUniformLocation, v: Float32Array | number[]): void;
-    uniform2i(location: WebGLUniformLocation | null, x: number, y: number): void;
-    uniform2iv(location: WebGLUniformLocation, v: Int32Array | number[]): void;
-    uniform3f(location: WebGLUniformLocation | null, x: number, y: number, z: number): void;
-    uniform3fv(location: WebGLUniformLocation, v: Float32Array | number[]): void;
-    uniform3i(location: WebGLUniformLocation | null, x: number, y: number, z: number): void;
-    uniform3iv(location: WebGLUniformLocation, v: Int32Array | number[]): void;
-    uniform4f(location: WebGLUniformLocation | null, x: number, y: number, z: number, w: number): void;
-    uniform4fv(location: WebGLUniformLocation, v: Float32Array | number[]): void;
-    uniform4i(location: WebGLUniformLocation | null, x: number, y: number, z: number, w: number): void;
-    uniform4iv(location: WebGLUniformLocation, v: Int32Array | number[]): void;
-    uniformMatrix2fv(location: WebGLUniformLocation, transpose: boolean, value: Float32Array | number[]): void;
-    uniformMatrix3fv(location: WebGLUniformLocation, transpose: boolean, value: Float32Array | number[]): void;
-    uniformMatrix4fv(location: WebGLUniformLocation, transpose: boolean, value: Float32Array | number[]): void;
-    useProgram(program: WebGLProgram | null): void;
-    validateProgram(program: WebGLProgram | null): void;
-    vertexAttrib1f(indx: number, x: number): void;
-    vertexAttrib1fv(indx: number, values: Float32Array | number[]): void;
-    vertexAttrib2f(indx: number, x: number, y: number): void;
-    vertexAttrib2fv(indx: number, values: Float32Array | number[]): void;
-    vertexAttrib3f(indx: number, x: number, y: number, z: number): void;
-    vertexAttrib3fv(indx: number, values: Float32Array | number[]): void;
-    vertexAttrib4f(indx: number, x: number, y: number, z: number, w: number): void;
-    vertexAttrib4fv(indx: number, values: Float32Array | number[]): void;
-    vertexAttribPointer(indx: number, size: number, type: number, normalized: boolean, stride: number, offset: number): void;
-    viewport(x: number, y: number, width: number, height: number): void;
-    readonly ACTIVE_ATTRIBUTES: number;
-    readonly ACTIVE_TEXTURE: number;
-    readonly ACTIVE_UNIFORMS: number;
-    readonly ALIASED_LINE_WIDTH_RANGE: number;
-    readonly ALIASED_POINT_SIZE_RANGE: number;
-    readonly ALPHA: number;
-    readonly ALPHA_BITS: number;
-    readonly ALWAYS: number;
-    readonly ARRAY_BUFFER: number;
-    readonly ARRAY_BUFFER_BINDING: number;
-    readonly ATTACHED_SHADERS: number;
-    readonly BACK: number;
-    readonly BLEND: number;
-    readonly BLEND_COLOR: number;
-    readonly BLEND_DST_ALPHA: number;
-    readonly BLEND_DST_RGB: number;
-    readonly BLEND_EQUATION: number;
-    readonly BLEND_EQUATION_ALPHA: number;
-    readonly BLEND_EQUATION_RGB: number;
-    readonly BLEND_SRC_ALPHA: number;
-    readonly BLEND_SRC_RGB: number;
-    readonly BLUE_BITS: number;
-    readonly BOOL: number;
-    readonly BOOL_VEC2: number;
-    readonly BOOL_VEC3: number;
-    readonly BOOL_VEC4: number;
-    readonly BROWSER_DEFAULT_WEBGL: number;
-    readonly BUFFER_SIZE: number;
-    readonly BUFFER_USAGE: number;
-    readonly BYTE: number;
-    readonly CCW: number;
-    readonly CLAMP_TO_EDGE: number;
-    readonly COLOR_ATTACHMENT0: number;
-    readonly COLOR_BUFFER_BIT: number;
-    readonly COLOR_CLEAR_VALUE: number;
-    readonly COLOR_WRITEMASK: number;
-    readonly COMPILE_STATUS: number;
-    readonly COMPRESSED_TEXTURE_FORMATS: number;
-    readonly CONSTANT_ALPHA: number;
-    readonly CONSTANT_COLOR: number;
-    readonly CONTEXT_LOST_WEBGL: number;
-    readonly CULL_FACE: number;
-    readonly CULL_FACE_MODE: number;
-    readonly CURRENT_PROGRAM: number;
-    readonly CURRENT_VERTEX_ATTRIB: number;
-    readonly CW: number;
-    readonly DECR: number;
-    readonly DECR_WRAP: number;
-    readonly DELETE_STATUS: number;
-    readonly DEPTH_ATTACHMENT: number;
-    readonly DEPTH_BITS: number;
-    readonly DEPTH_BUFFER_BIT: number;
-    readonly DEPTH_CLEAR_VALUE: number;
-    readonly DEPTH_COMPONENT: number;
-    readonly DEPTH_COMPONENT16: number;
-    readonly DEPTH_FUNC: number;
-    readonly DEPTH_RANGE: number;
-    readonly DEPTH_STENCIL: number;
-    readonly DEPTH_STENCIL_ATTACHMENT: number;
-    readonly DEPTH_TEST: number;
-    readonly DEPTH_WRITEMASK: number;
-    readonly DITHER: number;
-    readonly DONT_CARE: number;
-    readonly DST_ALPHA: number;
-    readonly DST_COLOR: number;
-    readonly DYNAMIC_DRAW: number;
-    readonly ELEMENT_ARRAY_BUFFER: number;
-    readonly ELEMENT_ARRAY_BUFFER_BINDING: number;
-    readonly EQUAL: number;
-    readonly FASTEST: number;
-    readonly FLOAT: number;
-    readonly FLOAT_MAT2: number;
-    readonly FLOAT_MAT3: number;
-    readonly FLOAT_MAT4: number;
-    readonly FLOAT_VEC2: number;
-    readonly FLOAT_VEC3: number;
-    readonly FLOAT_VEC4: number;
-    readonly FRAGMENT_SHADER: number;
-    readonly FRAMEBUFFER: number;
-    readonly FRAMEBUFFER_ATTACHMENT_OBJECT_NAME: number;
-    readonly FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE: number;
-    readonly FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE: number;
-    readonly FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL: number;
-    readonly FRAMEBUFFER_BINDING: number;
-    readonly FRAMEBUFFER_COMPLETE: number;
-    readonly FRAMEBUFFER_INCOMPLETE_ATTACHMENT: number;
-    readonly FRAMEBUFFER_INCOMPLETE_DIMENSIONS: number;
-    readonly FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT: number;
-    readonly FRAMEBUFFER_UNSUPPORTED: number;
-    readonly FRONT: number;
-    readonly FRONT_AND_BACK: number;
-    readonly FRONT_FACE: number;
-    readonly FUNC_ADD: number;
-    readonly FUNC_REVERSE_SUBTRACT: number;
-    readonly FUNC_SUBTRACT: number;
-    readonly GENERATE_MIPMAP_HINT: number;
-    readonly GEQUAL: number;
-    readonly GREATER: number;
-    readonly GREEN_BITS: number;
-    readonly HIGH_FLOAT: number;
-    readonly HIGH_INT: number;
-    readonly IMPLEMENTATION_COLOR_READ_FORMAT: number;
-    readonly IMPLEMENTATION_COLOR_READ_TYPE: number;
-    readonly INCR: number;
-    readonly INCR_WRAP: number;
-    readonly INT: number;
-    readonly INT_VEC2: number;
-    readonly INT_VEC3: number;
-    readonly INT_VEC4: number;
-    readonly INVALID_ENUM: number;
-    readonly INVALID_FRAMEBUFFER_OPERATION: number;
-    readonly INVALID_OPERATION: number;
-    readonly INVALID_VALUE: number;
-    readonly INVERT: number;
-    readonly KEEP: number;
-    readonly LEQUAL: number;
-    readonly LESS: number;
-    readonly LINEAR: number;
-    readonly LINEAR_MIPMAP_LINEAR: number;
-    readonly LINEAR_MIPMAP_NEAREST: number;
-    readonly LINES: number;
-    readonly LINE_LOOP: number;
-    readonly LINE_STRIP: number;
-    readonly LINE_WIDTH: number;
-    readonly LINK_STATUS: number;
-    readonly LOW_FLOAT: number;
-    readonly LOW_INT: number;
-    readonly LUMINANCE: number;
-    readonly LUMINANCE_ALPHA: number;
-    readonly MAX_COMBINED_TEXTURE_IMAGE_UNITS: number;
-    readonly MAX_CUBE_MAP_TEXTURE_SIZE: number;
-    readonly MAX_FRAGMENT_UNIFORM_VECTORS: number;
-    readonly MAX_RENDERBUFFER_SIZE: number;
-    readonly MAX_TEXTURE_IMAGE_UNITS: number;
-    readonly MAX_TEXTURE_SIZE: number;
-    readonly MAX_VARYING_VECTORS: number;
-    readonly MAX_VERTEX_ATTRIBS: number;
-    readonly MAX_VERTEX_TEXTURE_IMAGE_UNITS: number;
-    readonly MAX_VERTEX_UNIFORM_VECTORS: number;
-    readonly MAX_VIEWPORT_DIMS: number;
-    readonly MEDIUM_FLOAT: number;
-    readonly MEDIUM_INT: number;
-    readonly MIRRORED_REPEAT: number;
-    readonly NEAREST: number;
-    readonly NEAREST_MIPMAP_LINEAR: number;
-    readonly NEAREST_MIPMAP_NEAREST: number;
-    readonly NEVER: number;
-    readonly NICEST: number;
-    readonly NONE: number;
-    readonly NOTEQUAL: number;
-    readonly NO_ERROR: number;
-    readonly ONE: number;
-    readonly ONE_MINUS_CONSTANT_ALPHA: number;
-    readonly ONE_MINUS_CONSTANT_COLOR: number;
-    readonly ONE_MINUS_DST_ALPHA: number;
-    readonly ONE_MINUS_DST_COLOR: number;
-    readonly ONE_MINUS_SRC_ALPHA: number;
-    readonly ONE_MINUS_SRC_COLOR: number;
-    readonly OUT_OF_MEMORY: number;
-    readonly PACK_ALIGNMENT: number;
-    readonly POINTS: number;
-    readonly POLYGON_OFFSET_FACTOR: number;
-    readonly POLYGON_OFFSET_FILL: number;
-    readonly POLYGON_OFFSET_UNITS: number;
-    readonly RED_BITS: number;
-    readonly RENDERBUFFER: number;
-    readonly RENDERBUFFER_ALPHA_SIZE: number;
-    readonly RENDERBUFFER_BINDING: number;
-    readonly RENDERBUFFER_BLUE_SIZE: number;
-    readonly RENDERBUFFER_DEPTH_SIZE: number;
-    readonly RENDERBUFFER_GREEN_SIZE: number;
-    readonly RENDERBUFFER_HEIGHT: number;
-    readonly RENDERBUFFER_INTERNAL_FORMAT: number;
-    readonly RENDERBUFFER_RED_SIZE: number;
-    readonly RENDERBUFFER_STENCIL_SIZE: number;
-    readonly RENDERBUFFER_WIDTH: number;
-    readonly RENDERER: number;
-    readonly REPEAT: number;
-    readonly REPLACE: number;
-    readonly RGB: number;
-    readonly RGB565: number;
-    readonly RGB5_A1: number;
-    readonly RGBA: number;
-    readonly RGBA4: number;
-    readonly SAMPLER_2D: number;
-    readonly SAMPLER_CUBE: number;
-    readonly SAMPLES: number;
-    readonly SAMPLE_ALPHA_TO_COVERAGE: number;
-    readonly SAMPLE_BUFFERS: number;
-    readonly SAMPLE_COVERAGE: number;
-    readonly SAMPLE_COVERAGE_INVERT: number;
-    readonly SAMPLE_COVERAGE_VALUE: number;
-    readonly SCISSOR_BOX: number;
-    readonly SCISSOR_TEST: number;
-    readonly SHADER_TYPE: number;
-    readonly SHADING_LANGUAGE_VERSION: number;
-    readonly SHORT: number;
-    readonly SRC_ALPHA: number;
-    readonly SRC_ALPHA_SATURATE: number;
-    readonly SRC_COLOR: number;
-    readonly STATIC_DRAW: number;
-    readonly STENCIL_ATTACHMENT: number;
-    readonly STENCIL_BACK_FAIL: number;
-    readonly STENCIL_BACK_FUNC: number;
-    readonly STENCIL_BACK_PASS_DEPTH_FAIL: number;
-    readonly STENCIL_BACK_PASS_DEPTH_PASS: number;
-    readonly STENCIL_BACK_REF: number;
-    readonly STENCIL_BACK_VALUE_MASK: number;
-    readonly STENCIL_BACK_WRITEMASK: number;
-    readonly STENCIL_BITS: number;
-    readonly STENCIL_BUFFER_BIT: number;
-    readonly STENCIL_CLEAR_VALUE: number;
-    readonly STENCIL_FAIL: number;
-    readonly STENCIL_FUNC: number;
-    readonly STENCIL_INDEX: number;
-    readonly STENCIL_INDEX8: number;
-    readonly STENCIL_PASS_DEPTH_FAIL: number;
-    readonly STENCIL_PASS_DEPTH_PASS: number;
-    readonly STENCIL_REF: number;
-    readonly STENCIL_TEST: number;
-    readonly STENCIL_VALUE_MASK: number;
-    readonly STENCIL_WRITEMASK: number;
-    readonly STREAM_DRAW: number;
-    readonly SUBPIXEL_BITS: number;
-    readonly TEXTURE: number;
-    readonly TEXTURE0: number;
-    readonly TEXTURE1: number;
-    readonly TEXTURE10: number;
-    readonly TEXTURE11: number;
-    readonly TEXTURE12: number;
-    readonly TEXTURE13: number;
-    readonly TEXTURE14: number;
-    readonly TEXTURE15: number;
-    readonly TEXTURE16: number;
-    readonly TEXTURE17: number;
-    readonly TEXTURE18: number;
-    readonly TEXTURE19: number;
-    readonly TEXTURE2: number;
-    readonly TEXTURE20: number;
-    readonly TEXTURE21: number;
-    readonly TEXTURE22: number;
-    readonly TEXTURE23: number;
-    readonly TEXTURE24: number;
-    readonly TEXTURE25: number;
-    readonly TEXTURE26: number;
-    readonly TEXTURE27: number;
-    readonly TEXTURE28: number;
-    readonly TEXTURE29: number;
-    readonly TEXTURE3: number;
-    readonly TEXTURE30: number;
-    readonly TEXTURE31: number;
-    readonly TEXTURE4: number;
-    readonly TEXTURE5: number;
-    readonly TEXTURE6: number;
-    readonly TEXTURE7: number;
-    readonly TEXTURE8: number;
-    readonly TEXTURE9: number;
-    readonly TEXTURE_2D: number;
-    readonly TEXTURE_BINDING_2D: number;
-    readonly TEXTURE_BINDING_CUBE_MAP: number;
-    readonly TEXTURE_CUBE_MAP: number;
-    readonly TEXTURE_CUBE_MAP_NEGATIVE_X: number;
-    readonly TEXTURE_CUBE_MAP_NEGATIVE_Y: number;
-    readonly TEXTURE_CUBE_MAP_NEGATIVE_Z: number;
-    readonly TEXTURE_CUBE_MAP_POSITIVE_X: number;
-    readonly TEXTURE_CUBE_MAP_POSITIVE_Y: number;
-    readonly TEXTURE_CUBE_MAP_POSITIVE_Z: number;
-    readonly TEXTURE_MAG_FILTER: number;
-    readonly TEXTURE_MIN_FILTER: number;
-    readonly TEXTURE_WRAP_S: number;
-    readonly TEXTURE_WRAP_T: number;
-    readonly TRIANGLES: number;
-    readonly TRIANGLE_FAN: number;
-    readonly TRIANGLE_STRIP: number;
-    readonly UNPACK_ALIGNMENT: number;
-    readonly UNPACK_COLORSPACE_CONVERSION_WEBGL: number;
-    readonly UNPACK_FLIP_Y_WEBGL: number;
-    readonly UNPACK_PREMULTIPLY_ALPHA_WEBGL: number;
-    readonly UNSIGNED_BYTE: number;
-    readonly UNSIGNED_INT: number;
-    readonly UNSIGNED_SHORT: number;
-    readonly UNSIGNED_SHORT_4_4_4_4: number;
-    readonly UNSIGNED_SHORT_5_5_5_1: number;
-    readonly UNSIGNED_SHORT_5_6_5: number;
-    readonly VALIDATE_STATUS: number;
-    readonly VENDOR: number;
-    readonly VERSION: number;
-    readonly VERTEX_ATTRIB_ARRAY_BUFFER_BINDING: number;
-    readonly VERTEX_ATTRIB_ARRAY_ENABLED: number;
-    readonly VERTEX_ATTRIB_ARRAY_NORMALIZED: number;
-    readonly VERTEX_ATTRIB_ARRAY_POINTER: number;
-    readonly VERTEX_ATTRIB_ARRAY_SIZE: number;
-    readonly VERTEX_ATTRIB_ARRAY_STRIDE: number;
-    readonly VERTEX_ATTRIB_ARRAY_TYPE: number;
-    readonly VERTEX_SHADER: number;
-    readonly VIEWPORT: number;
-    readonly ZERO: number;
-}
-
-declare var WebGLRenderingContext: {
-    prototype: WebGLRenderingContext;
-    new(): WebGLRenderingContext;
-    readonly ACTIVE_ATTRIBUTES: number;
-    readonly ACTIVE_TEXTURE: number;
-    readonly ACTIVE_UNIFORMS: number;
-    readonly ALIASED_LINE_WIDTH_RANGE: number;
-    readonly ALIASED_POINT_SIZE_RANGE: number;
-    readonly ALPHA: number;
-    readonly ALPHA_BITS: number;
-    readonly ALWAYS: number;
-    readonly ARRAY_BUFFER: number;
-    readonly ARRAY_BUFFER_BINDING: number;
-    readonly ATTACHED_SHADERS: number;
-    readonly BACK: number;
-    readonly BLEND: number;
-    readonly BLEND_COLOR: number;
-    readonly BLEND_DST_ALPHA: number;
-    readonly BLEND_DST_RGB: number;
-    readonly BLEND_EQUATION: number;
-    readonly BLEND_EQUATION_ALPHA: number;
-    readonly BLEND_EQUATION_RGB: number;
-    readonly BLEND_SRC_ALPHA: number;
-    readonly BLEND_SRC_RGB: number;
-    readonly BLUE_BITS: number;
-    readonly BOOL: number;
-    readonly BOOL_VEC2: number;
-    readonly BOOL_VEC3: number;
-    readonly BOOL_VEC4: number;
-    readonly BROWSER_DEFAULT_WEBGL: number;
-    readonly BUFFER_SIZE: number;
-    readonly BUFFER_USAGE: number;
-    readonly BYTE: number;
-    readonly CCW: number;
-    readonly CLAMP_TO_EDGE: number;
-    readonly COLOR_ATTACHMENT0: number;
-    readonly COLOR_BUFFER_BIT: number;
-    readonly COLOR_CLEAR_VALUE: number;
-    readonly COLOR_WRITEMASK: number;
-    readonly COMPILE_STATUS: number;
-    readonly COMPRESSED_TEXTURE_FORMATS: number;
-    readonly CONSTANT_ALPHA: number;
-    readonly CONSTANT_COLOR: number;
-    readonly CONTEXT_LOST_WEBGL: number;
-    readonly CULL_FACE: number;
-    readonly CULL_FACE_MODE: number;
-    readonly CURRENT_PROGRAM: number;
-    readonly CURRENT_VERTEX_ATTRIB: number;
-    readonly CW: number;
-    readonly DECR: number;
-    readonly DECR_WRAP: number;
-    readonly DELETE_STATUS: number;
-    readonly DEPTH_ATTACHMENT: number;
-    readonly DEPTH_BITS: number;
-    readonly DEPTH_BUFFER_BIT: number;
-    readonly DEPTH_CLEAR_VALUE: number;
-    readonly DEPTH_COMPONENT: number;
-    readonly DEPTH_COMPONENT16: number;
-    readonly DEPTH_FUNC: number;
-    readonly DEPTH_RANGE: number;
-    readonly DEPTH_STENCIL: number;
-    readonly DEPTH_STENCIL_ATTACHMENT: number;
-    readonly DEPTH_TEST: number;
-    readonly DEPTH_WRITEMASK: number;
-    readonly DITHER: number;
-    readonly DONT_CARE: number;
-    readonly DST_ALPHA: number;
-    readonly DST_COLOR: number;
-    readonly DYNAMIC_DRAW: number;
-    readonly ELEMENT_ARRAY_BUFFER: number;
-    readonly ELEMENT_ARRAY_BUFFER_BINDING: number;
-    readonly EQUAL: number;
-    readonly FASTEST: number;
-    readonly FLOAT: number;
-    readonly FLOAT_MAT2: number;
-    readonly FLOAT_MAT3: number;
-    readonly FLOAT_MAT4: number;
-    readonly FLOAT_VEC2: number;
-    readonly FLOAT_VEC3: number;
-    readonly FLOAT_VEC4: number;
-    readonly FRAGMENT_SHADER: number;
-    readonly FRAMEBUFFER: number;
-    readonly FRAMEBUFFER_ATTACHMENT_OBJECT_NAME: number;
-    readonly FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE: number;
-    readonly FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE: number;
-    readonly FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL: number;
-    readonly FRAMEBUFFER_BINDING: number;
-    readonly FRAMEBUFFER_COMPLETE: number;
-    readonly FRAMEBUFFER_INCOMPLETE_ATTACHMENT: number;
-    readonly FRAMEBUFFER_INCOMPLETE_DIMENSIONS: number;
-    readonly FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT: number;
-    readonly FRAMEBUFFER_UNSUPPORTED: number;
-    readonly FRONT: number;
-    readonly FRONT_AND_BACK: number;
-    readonly FRONT_FACE: number;
-    readonly FUNC_ADD: number;
-    readonly FUNC_REVERSE_SUBTRACT: number;
-    readonly FUNC_SUBTRACT: number;
-    readonly GENERATE_MIPMAP_HINT: number;
-    readonly GEQUAL: number;
-    readonly GREATER: number;
-    readonly GREEN_BITS: number;
-    readonly HIGH_FLOAT: number;
-    readonly HIGH_INT: number;
-    readonly IMPLEMENTATION_COLOR_READ_FORMAT: number;
-    readonly IMPLEMENTATION_COLOR_READ_TYPE: number;
-    readonly INCR: number;
-    readonly INCR_WRAP: number;
-    readonly INT: number;
-    readonly INT_VEC2: number;
-    readonly INT_VEC3: number;
-    readonly INT_VEC4: number;
-    readonly INVALID_ENUM: number;
-    readonly INVALID_FRAMEBUFFER_OPERATION: number;
-    readonly INVALID_OPERATION: number;
-    readonly INVALID_VALUE: number;
-    readonly INVERT: number;
-    readonly KEEP: number;
-    readonly LEQUAL: number;
-    readonly LESS: number;
-    readonly LINEAR: number;
-    readonly LINEAR_MIPMAP_LINEAR: number;
-    readonly LINEAR_MIPMAP_NEAREST: number;
-    readonly LINES: number;
-    readonly LINE_LOOP: number;
-    readonly LINE_STRIP: number;
-    readonly LINE_WIDTH: number;
-    readonly LINK_STATUS: number;
-    readonly LOW_FLOAT: number;
-    readonly LOW_INT: number;
-    readonly LUMINANCE: number;
-    readonly LUMINANCE_ALPHA: number;
-    readonly MAX_COMBINED_TEXTURE_IMAGE_UNITS: number;
-    readonly MAX_CUBE_MAP_TEXTURE_SIZE: number;
-    readonly MAX_FRAGMENT_UNIFORM_VECTORS: number;
-    readonly MAX_RENDERBUFFER_SIZE: number;
-    readonly MAX_TEXTURE_IMAGE_UNITS: number;
-    readonly MAX_TEXTURE_SIZE: number;
-    readonly MAX_VARYING_VECTORS: number;
-    readonly MAX_VERTEX_ATTRIBS: number;
-    readonly MAX_VERTEX_TEXTURE_IMAGE_UNITS: number;
-    readonly MAX_VERTEX_UNIFORM_VECTORS: number;
-    readonly MAX_VIEWPORT_DIMS: number;
-    readonly MEDIUM_FLOAT: number;
-    readonly MEDIUM_INT: number;
-    readonly MIRRORED_REPEAT: number;
-    readonly NEAREST: number;
-    readonly NEAREST_MIPMAP_LINEAR: number;
-    readonly NEAREST_MIPMAP_NEAREST: number;
-    readonly NEVER: number;
-    readonly NICEST: number;
-    readonly NONE: number;
-    readonly NOTEQUAL: number;
-    readonly NO_ERROR: number;
-    readonly ONE: number;
-    readonly ONE_MINUS_CONSTANT_ALPHA: number;
-    readonly ONE_MINUS_CONSTANT_COLOR: number;
-    readonly ONE_MINUS_DST_ALPHA: number;
-    readonly ONE_MINUS_DST_COLOR: number;
-    readonly ONE_MINUS_SRC_ALPHA: number;
-    readonly ONE_MINUS_SRC_COLOR: number;
-    readonly OUT_OF_MEMORY: number;
-    readonly PACK_ALIGNMENT: number;
-    readonly POINTS: number;
-    readonly POLYGON_OFFSET_FACTOR: number;
-    readonly POLYGON_OFFSET_FILL: number;
-    readonly POLYGON_OFFSET_UNITS: number;
-    readonly RED_BITS: number;
-    readonly RENDERBUFFER: number;
-    readonly RENDERBUFFER_ALPHA_SIZE: number;
-    readonly RENDERBUFFER_BINDING: number;
-    readonly RENDERBUFFER_BLUE_SIZE: number;
-    readonly RENDERBUFFER_DEPTH_SIZE: number;
-    readonly RENDERBUFFER_GREEN_SIZE: number;
-    readonly RENDERBUFFER_HEIGHT: number;
-    readonly RENDERBUFFER_INTERNAL_FORMAT: number;
-    readonly RENDERBUFFER_RED_SIZE: number;
-    readonly RENDERBUFFER_STENCIL_SIZE: number;
-    readonly RENDERBUFFER_WIDTH: number;
-    readonly RENDERER: number;
-    readonly REPEAT: number;
-    readonly REPLACE: number;
-    readonly RGB: number;
-    readonly RGB565: number;
-    readonly RGB5_A1: number;
-    readonly RGBA: number;
-    readonly RGBA4: number;
-    readonly SAMPLER_2D: number;
-    readonly SAMPLER_CUBE: number;
-    readonly SAMPLES: number;
-    readonly SAMPLE_ALPHA_TO_COVERAGE: number;
-    readonly SAMPLE_BUFFERS: number;
-    readonly SAMPLE_COVERAGE: number;
-    readonly SAMPLE_COVERAGE_INVERT: number;
-    readonly SAMPLE_COVERAGE_VALUE: number;
-    readonly SCISSOR_BOX: number;
-    readonly SCISSOR_TEST: number;
-    readonly SHADER_TYPE: number;
-    readonly SHADING_LANGUAGE_VERSION: number;
-    readonly SHORT: number;
-    readonly SRC_ALPHA: number;
-    readonly SRC_ALPHA_SATURATE: number;
-    readonly SRC_COLOR: number;
-    readonly STATIC_DRAW: number;
-    readonly STENCIL_ATTACHMENT: number;
-    readonly STENCIL_BACK_FAIL: number;
-    readonly STENCIL_BACK_FUNC: number;
-    readonly STENCIL_BACK_PASS_DEPTH_FAIL: number;
-    readonly STENCIL_BACK_PASS_DEPTH_PASS: number;
-    readonly STENCIL_BACK_REF: number;
-    readonly STENCIL_BACK_VALUE_MASK: number;
-    readonly STENCIL_BACK_WRITEMASK: number;
-    readonly STENCIL_BITS: number;
-    readonly STENCIL_BUFFER_BIT: number;
-    readonly STENCIL_CLEAR_VALUE: number;
-    readonly STENCIL_FAIL: number;
-    readonly STENCIL_FUNC: number;
-    readonly STENCIL_INDEX: number;
-    readonly STENCIL_INDEX8: number;
-    readonly STENCIL_PASS_DEPTH_FAIL: number;
-    readonly STENCIL_PASS_DEPTH_PASS: number;
-    readonly STENCIL_REF: number;
-    readonly STENCIL_TEST: number;
-    readonly STENCIL_VALUE_MASK: number;
-    readonly STENCIL_WRITEMASK: number;
-    readonly STREAM_DRAW: number;
-    readonly SUBPIXEL_BITS: number;
-    readonly TEXTURE: number;
-    readonly TEXTURE0: number;
-    readonly TEXTURE1: number;
-    readonly TEXTURE10: number;
-    readonly TEXTURE11: number;
-    readonly TEXTURE12: number;
-    readonly TEXTURE13: number;
-    readonly TEXTURE14: number;
-    readonly TEXTURE15: number;
-    readonly TEXTURE16: number;
-    readonly TEXTURE17: number;
-    readonly TEXTURE18: number;
-    readonly TEXTURE19: number;
-    readonly TEXTURE2: number;
-    readonly TEXTURE20: number;
-    readonly TEXTURE21: number;
-    readonly TEXTURE22: number;
-    readonly TEXTURE23: number;
-    readonly TEXTURE24: number;
-    readonly TEXTURE25: number;
-    readonly TEXTURE26: number;
-    readonly TEXTURE27: number;
-    readonly TEXTURE28: number;
-    readonly TEXTURE29: number;
-    readonly TEXTURE3: number;
-    readonly TEXTURE30: number;
-    readonly TEXTURE31: number;
-    readonly TEXTURE4: number;
-    readonly TEXTURE5: number;
-    readonly TEXTURE6: number;
-    readonly TEXTURE7: number;
-    readonly TEXTURE8: number;
-    readonly TEXTURE9: number;
-    readonly TEXTURE_2D: number;
-    readonly TEXTURE_BINDING_2D: number;
-    readonly TEXTURE_BINDING_CUBE_MAP: number;
-    readonly TEXTURE_CUBE_MAP: number;
-    readonly TEXTURE_CUBE_MAP_NEGATIVE_X: number;
-    readonly TEXTURE_CUBE_MAP_NEGATIVE_Y: number;
-    readonly TEXTURE_CUBE_MAP_NEGATIVE_Z: number;
-    readonly TEXTURE_CUBE_MAP_POSITIVE_X: number;
-    readonly TEXTURE_CUBE_MAP_POSITIVE_Y: number;
-    readonly TEXTURE_CUBE_MAP_POSITIVE_Z: number;
-    readonly TEXTURE_MAG_FILTER: number;
-    readonly TEXTURE_MIN_FILTER: number;
-    readonly TEXTURE_WRAP_S: number;
-    readonly TEXTURE_WRAP_T: number;
-    readonly TRIANGLES: number;
-    readonly TRIANGLE_FAN: number;
-    readonly TRIANGLE_STRIP: number;
-    readonly UNPACK_ALIGNMENT: number;
-    readonly UNPACK_COLORSPACE_CONVERSION_WEBGL: number;
-    readonly UNPACK_FLIP_Y_WEBGL: number;
-    readonly UNPACK_PREMULTIPLY_ALPHA_WEBGL: number;
-    readonly UNSIGNED_BYTE: number;
-    readonly UNSIGNED_INT: number;
-    readonly UNSIGNED_SHORT: number;
-    readonly UNSIGNED_SHORT_4_4_4_4: number;
-    readonly UNSIGNED_SHORT_5_5_5_1: number;
-    readonly UNSIGNED_SHORT_5_6_5: number;
-    readonly VALIDATE_STATUS: number;
-    readonly VENDOR: number;
-    readonly VERSION: number;
-    readonly VERTEX_ATTRIB_ARRAY_BUFFER_BINDING: number;
-    readonly VERTEX_ATTRIB_ARRAY_ENABLED: number;
-    readonly VERTEX_ATTRIB_ARRAY_NORMALIZED: number;
-    readonly VERTEX_ATTRIB_ARRAY_POINTER: number;
-    readonly VERTEX_ATTRIB_ARRAY_SIZE: number;
-    readonly VERTEX_ATTRIB_ARRAY_STRIDE: number;
-    readonly VERTEX_ATTRIB_ARRAY_TYPE: number;
-    readonly VERTEX_SHADER: number;
-    readonly VIEWPORT: number;
-    readonly ZERO: number;
-}
-
-interface WebGLShader extends WebGLObject {
-}
-
-declare var WebGLShader: {
-    prototype: WebGLShader;
-    new(): WebGLShader;
-}
-
-interface WebGLShaderPrecisionFormat {
-    readonly precision: number;
-    readonly rangeMax: number;
-    readonly rangeMin: number;
-}
-
-declare var WebGLShaderPrecisionFormat: {
-    prototype: WebGLShaderPrecisionFormat;
-    new(): WebGLShaderPrecisionFormat;
-}
-
-interface WebGLTexture extends WebGLObject {
-}
-
-declare var WebGLTexture: {
-    prototype: WebGLTexture;
-    new(): WebGLTexture;
-}
-
-interface WebGLUniformLocation {
-}
-
-declare var WebGLUniformLocation: {
-    prototype: WebGLUniformLocation;
-    new(): WebGLUniformLocation;
-}
-
-interface WebKitCSSMatrix {
-    a: number;
-    b: number;
-    c: number;
-    d: number;
-    e: number;
-    f: number;
-    m11: number;
-    m12: number;
-    m13: number;
-    m14: number;
-    m21: number;
-    m22: number;
-    m23: number;
-    m24: number;
-    m31: number;
-    m32: number;
-    m33: number;
-    m34: number;
-    m41: number;
-    m42: number;
-    m43: number;
-    m44: number;
-    inverse(): WebKitCSSMatrix;
-    multiply(secondMatrix: WebKitCSSMatrix): WebKitCSSMatrix;
-    rotate(angleX: number, angleY?: number, angleZ?: number): WebKitCSSMatrix;
-    rotateAxisAngle(x: number, y: number, z: number, angle: number): WebKitCSSMatrix;
-    scale(scaleX: number, scaleY?: number, scaleZ?: number): WebKitCSSMatrix;
-    setMatrixValue(value: string): void;
-    skewX(angle: number): WebKitCSSMatrix;
-    skewY(angle: number): WebKitCSSMatrix;
-    toString(): string;
-    translate(x: number, y: number, z?: number): WebKitCSSMatrix;
-}
-
-declare var WebKitCSSMatrix: {
-    prototype: WebKitCSSMatrix;
-    new(text?: string): WebKitCSSMatrix;
-}
-
-interface WebKitPoint {
-    x: number;
-    y: number;
-}
-
-declare var WebKitPoint: {
-    prototype: WebKitPoint;
-    new(x?: number, y?: number): WebKitPoint;
-}
-
-interface WebSocket extends EventTarget {
-    binaryType: string;
-    readonly bufferedAmount: number;
-    readonly extensions: string;
-    onclose: (this: this, ev: CloseEvent) => any;
-    onerror: (this: this, ev: ErrorEvent) => any;
-    onmessage: (this: this, ev: MessageEvent) => any;
-    onopen: (this: this, ev: Event) => any;
-    readonly protocol: string;
-    readonly readyState: number;
-    readonly url: string;
-    close(code?: number, reason?: string): void;
-    send(data: any): void;
-    readonly CLOSED: number;
-    readonly CLOSING: number;
-    readonly CONNECTING: number;
-    readonly OPEN: number;
-    addEventListener(type: "close", listener: (this: this, ev: CloseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "message", listener: (this: this, ev: MessageEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "open", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var WebSocket: {
-    prototype: WebSocket;
-    new(url: string, protocols?: string | string[]): WebSocket;
-    readonly CLOSED: number;
-    readonly CLOSING: number;
-    readonly CONNECTING: number;
-    readonly OPEN: number;
-}
-
-interface WheelEvent extends MouseEvent {
-    readonly deltaMode: number;
-    readonly deltaX: number;
-    readonly deltaY: number;
-    readonly deltaZ: number;
-    readonly wheelDelta: number;
-    readonly wheelDeltaX: number;
-    readonly wheelDeltaY: number;
-    getCurrentPoint(element: Element): void;
-    initWheelEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, buttonArg: number, relatedTargetArg: EventTarget, modifiersListArg: string, deltaXArg: number, deltaYArg: number, deltaZArg: number, deltaMode: number): void;
-    readonly DOM_DELTA_LINE: number;
-    readonly DOM_DELTA_PAGE: number;
-    readonly DOM_DELTA_PIXEL: number;
-}
-
-declare var WheelEvent: {
-    prototype: WheelEvent;
-    new(typeArg: string, eventInitDict?: WheelEventInit): WheelEvent;
-    readonly DOM_DELTA_LINE: number;
-    readonly DOM_DELTA_PAGE: number;
-    readonly DOM_DELTA_PIXEL: number;
-}
-
-interface Window extends EventTarget, WindowTimers, WindowSessionStorage, WindowLocalStorage, WindowConsole, GlobalEventHandlers, IDBEnvironment, WindowBase64 {
-    readonly applicationCache: ApplicationCache;
-    readonly clientInformation: Navigator;
-    readonly closed: boolean;
-    readonly crypto: Crypto;
-    defaultStatus: string;
-    readonly devicePixelRatio: number;
-    readonly doNotTrack: string;
-    readonly document: Document;
-    event: Event;
-    readonly external: External;
-    readonly frameElement: Element;
-    readonly frames: Window;
-    readonly history: History;
-    readonly innerHeight: number;
-    readonly innerWidth: number;
-    readonly length: number;
-    readonly location: Location;
-    readonly locationbar: BarProp;
-    readonly menubar: BarProp;
-    readonly msCredentials: MSCredentials;
-    name: string;
-    readonly navigator: Navigator;
-    offscreenBuffering: string | boolean;
-    onabort: (this: this, ev: UIEvent) => any;
-    onafterprint: (this: this, ev: Event) => any;
-    onbeforeprint: (this: this, ev: Event) => any;
-    onbeforeunload: (this: this, ev: BeforeUnloadEvent) => any;
-    onblur: (this: this, ev: FocusEvent) => any;
-    oncanplay: (this: this, ev: Event) => any;
-    oncanplaythrough: (this: this, ev: Event) => any;
-    onchange: (this: this, ev: Event) => any;
-    onclick: (this: this, ev: MouseEvent) => any;
-    oncompassneedscalibration: (this: this, ev: Event) => any;
-    oncontextmenu: (this: this, ev: PointerEvent) => any;
-    ondblclick: (this: this, ev: MouseEvent) => any;
-    ondevicelight: (this: this, ev: DeviceLightEvent) => any;
-    ondevicemotion: (this: this, ev: DeviceMotionEvent) => any;
-    ondeviceorientation: (this: this, ev: DeviceOrientationEvent) => any;
-    ondrag: (this: this, ev: DragEvent) => any;
-    ondragend: (this: this, ev: DragEvent) => any;
-    ondragenter: (this: this, ev: DragEvent) => any;
-    ondragleave: (this: this, ev: DragEvent) => any;
-    ondragover: (this: this, ev: DragEvent) => any;
-    ondragstart: (this: this, ev: DragEvent) => any;
-    ondrop: (this: this, ev: DragEvent) => any;
-    ondurationchange: (this: this, ev: Event) => any;
-    onemptied: (this: this, ev: Event) => any;
-    onended: (this: this, ev: MediaStreamErrorEvent) => any;
-    onerror: ErrorEventHandler;
-    onfocus: (this: this, ev: FocusEvent) => any;
-    onhashchange: (this: this, ev: HashChangeEvent) => any;
-    oninput: (this: this, ev: Event) => any;
-    oninvalid: (this: this, ev: Event) => any;
-    onkeydown: (this: this, ev: KeyboardEvent) => any;
-    onkeypress: (this: this, ev: KeyboardEvent) => any;
-    onkeyup: (this: this, ev: KeyboardEvent) => any;
-    onload: (this: this, ev: Event) => any;
-    onloadeddata: (this: this, ev: Event) => any;
-    onloadedmetadata: (this: this, ev: Event) => any;
-    onloadstart: (this: this, ev: Event) => any;
-    onmessage: (this: this, ev: MessageEvent) => any;
-    onmousedown: (this: this, ev: MouseEvent) => any;
-    onmouseenter: (this: this, ev: MouseEvent) => any;
-    onmouseleave: (this: this, ev: MouseEvent) => any;
-    onmousemove: (this: this, ev: MouseEvent) => any;
-    onmouseout: (this: this, ev: MouseEvent) => any;
-    onmouseover: (this: this, ev: MouseEvent) => any;
-    onmouseup: (this: this, ev: MouseEvent) => any;
-    onmousewheel: (this: this, ev: WheelEvent) => any;
-    onmsgesturechange: (this: this, ev: MSGestureEvent) => any;
-    onmsgesturedoubletap: (this: this, ev: MSGestureEvent) => any;
-    onmsgestureend: (this: this, ev: MSGestureEvent) => any;
-    onmsgesturehold: (this: this, ev: MSGestureEvent) => any;
-    onmsgesturestart: (this: this, ev: MSGestureEvent) => any;
-    onmsgesturetap: (this: this, ev: MSGestureEvent) => any;
-    onmsinertiastart: (this: this, ev: MSGestureEvent) => any;
-    onmspointercancel: (this: this, ev: MSPointerEvent) => any;
-    onmspointerdown: (this: this, ev: MSPointerEvent) => any;
-    onmspointerenter: (this: this, ev: MSPointerEvent) => any;
-    onmspointerleave: (this: this, ev: MSPointerEvent) => any;
-    onmspointermove: (this: this, ev: MSPointerEvent) => any;
-    onmspointerout: (this: this, ev: MSPointerEvent) => any;
-    onmspointerover: (this: this, ev: MSPointerEvent) => any;
-    onmspointerup: (this: this, ev: MSPointerEvent) => any;
-    onoffline: (this: this, ev: Event) => any;
-    ononline: (this: this, ev: Event) => any;
-    onorientationchange: (this: this, ev: Event) => any;
-    onpagehide: (this: this, ev: PageTransitionEvent) => any;
-    onpageshow: (this: this, ev: PageTransitionEvent) => any;
-    onpause: (this: this, ev: Event) => any;
-    onplay: (this: this, ev: Event) => any;
-    onplaying: (this: this, ev: Event) => any;
-    onpopstate: (this: this, ev: PopStateEvent) => any;
-    onprogress: (this: this, ev: ProgressEvent) => any;
-    onratechange: (this: this, ev: Event) => any;
-    onreadystatechange: (this: this, ev: ProgressEvent) => any;
-    onreset: (this: this, ev: Event) => any;
-    onresize: (this: this, ev: UIEvent) => any;
-    onscroll: (this: this, ev: UIEvent) => any;
-    onseeked: (this: this, ev: Event) => any;
-    onseeking: (this: this, ev: Event) => any;
-    onselect: (this: this, ev: UIEvent) => any;
-    onstalled: (this: this, ev: Event) => any;
-    onstorage: (this: this, ev: StorageEvent) => any;
-    onsubmit: (this: this, ev: Event) => any;
-    onsuspend: (this: this, ev: Event) => any;
-    ontimeupdate: (this: this, ev: Event) => any;
-    ontouchcancel: (ev: TouchEvent) => any;
-    ontouchend: (ev: TouchEvent) => any;
-    ontouchmove: (ev: TouchEvent) => any;
-    ontouchstart: (ev: TouchEvent) => any;
-    onunload: (this: this, ev: Event) => any;
-    onvolumechange: (this: this, ev: Event) => any;
-    onwaiting: (this: this, ev: Event) => any;
-    opener: any;
-    orientation: string | number;
-    readonly outerHeight: number;
-    readonly outerWidth: number;
-    readonly pageXOffset: number;
-    readonly pageYOffset: number;
-    readonly parent: Window;
-    readonly performance: Performance;
-    readonly personalbar: BarProp;
-    readonly screen: Screen;
-    readonly screenLeft: number;
-    readonly screenTop: number;
-    readonly screenX: number;
-    readonly screenY: number;
-    readonly scrollX: number;
-    readonly scrollY: number;
-    readonly scrollbars: BarProp;
-    readonly self: Window;
-    status: string;
-    readonly statusbar: BarProp;
-    readonly styleMedia: StyleMedia;
-    readonly toolbar: BarProp;
-    readonly top: Window;
-    readonly window: Window;
-    URL: typeof URL;
-    Blob: typeof Blob;
-    alert(message?: any): void;
-    blur(): void;
-    cancelAnimationFrame(handle: number): void;
-    captureEvents(): void;
-    close(): void;
-    confirm(message?: string): boolean;
-    focus(): void;
-    getComputedStyle(elt: Element, pseudoElt?: string): CSSStyleDeclaration;
-    getMatchedCSSRules(elt: Element, pseudoElt?: string): CSSRuleList;
-    getSelection(): Selection;
-    matchMedia(mediaQuery: string): MediaQueryList;
-    moveBy(x?: number, y?: number): void;
-    moveTo(x?: number, y?: number): void;
-    msWriteProfilerMark(profilerMarkName: string): void;
-    open(url?: string, target?: string, features?: string, replace?: boolean): Window;
-    postMessage(message: any, targetOrigin: string, transfer?: any[]): void;
-    print(): void;
-    prompt(message?: string, _default?: string): string | null;
-    releaseEvents(): void;
-    requestAnimationFrame(callback: FrameRequestCallback): number;
-    resizeBy(x?: number, y?: number): void;
-    resizeTo(x?: number, y?: number): void;
-    scroll(x?: number, y?: number): void;
-    scrollBy(x?: number, y?: number): void;
-    scrollTo(x?: number, y?: number): void;
-    webkitCancelAnimationFrame(handle: number): void;
-    webkitConvertPointFromNodeToPage(node: Node, pt: WebKitPoint): WebKitPoint;
-    webkitConvertPointFromPageToNode(node: Node, pt: WebKitPoint): WebKitPoint;
-    webkitRequestAnimationFrame(callback: FrameRequestCallback): number;
-    scroll(options?: ScrollToOptions): void;
-    scrollTo(options?: ScrollToOptions): void;
-    scrollBy(options?: ScrollToOptions): void;
-    addEventListener(type: "MSGestureChange", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureDoubleTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureEnd", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureHold", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSInertiaStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerCancel", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerDown", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerEnter", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerLeave", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerMove", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOut", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOver", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerUp", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "abort", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "afterprint", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforeprint", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforeunload", listener: (this: this, ev: BeforeUnloadEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "blur", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplay", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplaythrough", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "change", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "click", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "compassneedscalibration", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "contextmenu", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dblclick", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "devicelight", listener: (this: this, ev: DeviceLightEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "devicemotion", listener: (this: this, ev: DeviceMotionEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "deviceorientation", listener: (this: this, ev: DeviceOrientationEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drag", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragend", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragenter", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragleave", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragover", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragstart", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drop", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "durationchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "emptied", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "ended", listener: (this: this, ev: MediaStreamErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "focus", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "hashchange", listener: (this: this, ev: HashChangeEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "input", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "invalid", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "keydown", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keypress", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keyup", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadeddata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadedmetadata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "message", listener: (this: this, ev: MessageEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousedown", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseenter", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseleave", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousemove", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseout", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseover", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseup", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousewheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "offline", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "online", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "orientationchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "pagehide", listener: (this: this, ev: PageTransitionEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pageshow", listener: (this: this, ev: PageTransitionEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pause", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "play", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "playing", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointercancel", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerdown", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerenter", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerleave", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointermove", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerout", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerover", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerup", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "popstate", listener: (this: this, ev: PopStateEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "progress", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ratechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "readystatechange", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "reset", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "resize", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "scroll", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeked", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeking", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "select", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "stalled", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "storage", listener: (this: this, ev: StorageEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "submit", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "suspend", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "timeupdate", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "unload", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "volumechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "waiting", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "wheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var Window: {
-    prototype: Window;
-    new(): Window;
-}
-
-interface Worker extends EventTarget, AbstractWorker {
-    onmessage: (this: this, ev: MessageEvent) => any;
-    postMessage(message: any, ports?: any): void;
-    terminate(): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "message", listener: (this: this, ev: MessageEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var Worker: {
-    prototype: Worker;
-    new(stringUrl: string): Worker;
-}
-
-interface XMLDocument extends Document {
-}
-
-declare var XMLDocument: {
-    prototype: XMLDocument;
-    new(): XMLDocument;
-}
-
-interface XMLHttpRequest extends EventTarget, XMLHttpRequestEventTarget {
-    onreadystatechange: (this: this, ev: Event) => any;
-    readonly readyState: number;
-    readonly response: any;
-    readonly responseText: string;
-    responseType: string;
-    readonly responseXML: any;
-    readonly status: number;
-    readonly statusText: string;
-    timeout: number;
-    readonly upload: XMLHttpRequestUpload;
-    withCredentials: boolean;
-    msCaching?: string;
-    abort(): void;
-    getAllResponseHeaders(): string;
-    getResponseHeader(header: string): string | null;
-    msCachingEnabled(): boolean;
-    open(method: string, url: string, async?: boolean, user?: string, password?: string): void;
-    overrideMimeType(mime: string): void;
-    send(data?: Document): void;
-    send(data?: string): void;
-    send(data?: any): void;
-    setRequestHeader(header: string, value: string): void;
-    readonly DONE: number;
-    readonly HEADERS_RECEIVED: number;
-    readonly LOADING: number;
-    readonly OPENED: number;
-    readonly UNSENT: number;
-    addEventListener(type: "abort", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadend", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadstart", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "progress", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "readystatechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "timeout", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var XMLHttpRequest: {
-    prototype: XMLHttpRequest;
-    new(): XMLHttpRequest;
-    readonly DONE: number;
-    readonly HEADERS_RECEIVED: number;
-    readonly LOADING: number;
-    readonly OPENED: number;
-    readonly UNSENT: number;
-    create(): XMLHttpRequest;
-}
-
-interface XMLHttpRequestUpload extends EventTarget, XMLHttpRequestEventTarget {
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var XMLHttpRequestUpload: {
-    prototype: XMLHttpRequestUpload;
-    new(): XMLHttpRequestUpload;
-}
-
-interface XMLSerializer {
-    serializeToString(target: Node): string;
-}
-
-declare var XMLSerializer: {
-    prototype: XMLSerializer;
-    new(): XMLSerializer;
-}
-
-interface XPathEvaluator {
-    createExpression(expression: string, resolver: XPathNSResolver): XPathExpression;
-    createNSResolver(nodeResolver?: Node): XPathNSResolver;
-    evaluate(expression: string, contextNode: Node, resolver: XPathNSResolver, type: number, result: XPathResult): XPathResult;
-}
-
-declare var XPathEvaluator: {
-    prototype: XPathEvaluator;
-    new(): XPathEvaluator;
-}
-
-interface XPathExpression {
-    evaluate(contextNode: Node, type: number, result: XPathResult): XPathExpression;
-}
-
-declare var XPathExpression: {
-    prototype: XPathExpression;
-    new(): XPathExpression;
-}
-
-interface XPathNSResolver {
-    lookupNamespaceURI(prefix: string): string;
-}
-
-declare var XPathNSResolver: {
-    prototype: XPathNSResolver;
-    new(): XPathNSResolver;
-}
-
-interface XPathResult {
-    readonly booleanValue: boolean;
-    readonly invalidIteratorState: boolean;
-    readonly numberValue: number;
-    readonly resultType: number;
-    readonly singleNodeValue: Node;
-    readonly snapshotLength: number;
-    readonly stringValue: string;
-    iterateNext(): Node;
-    snapshotItem(index: number): Node;
-    readonly ANY_TYPE: number;
-    readonly ANY_UNORDERED_NODE_TYPE: number;
-    readonly BOOLEAN_TYPE: number;
-    readonly FIRST_ORDERED_NODE_TYPE: number;
-    readonly NUMBER_TYPE: number;
-    readonly ORDERED_NODE_ITERATOR_TYPE: number;
-    readonly ORDERED_NODE_SNAPSHOT_TYPE: number;
-    readonly STRING_TYPE: number;
-    readonly UNORDERED_NODE_ITERATOR_TYPE: number;
-    readonly UNORDERED_NODE_SNAPSHOT_TYPE: number;
-}
-
-declare var XPathResult: {
-    prototype: XPathResult;
-    new(): XPathResult;
-    readonly ANY_TYPE: number;
-    readonly ANY_UNORDERED_NODE_TYPE: number;
-    readonly BOOLEAN_TYPE: number;
-    readonly FIRST_ORDERED_NODE_TYPE: number;
-    readonly NUMBER_TYPE: number;
-    readonly ORDERED_NODE_ITERATOR_TYPE: number;
-    readonly ORDERED_NODE_SNAPSHOT_TYPE: number;
-    readonly STRING_TYPE: number;
-    readonly UNORDERED_NODE_ITERATOR_TYPE: number;
-    readonly UNORDERED_NODE_SNAPSHOT_TYPE: number;
-}
-
-interface XSLTProcessor {
-    clearParameters(): void;
-    getParameter(namespaceURI: string, localName: string): any;
-    importStylesheet(style: Node): void;
-    removeParameter(namespaceURI: string, localName: string): void;
-    reset(): void;
-    setParameter(namespaceURI: string, localName: string, value: any): void;
-    transformToDocument(source: Node): Document;
-    transformToFragment(source: Node, document: Document): DocumentFragment;
-}
-
-declare var XSLTProcessor: {
-    prototype: XSLTProcessor;
-    new(): XSLTProcessor;
-}
-
-interface AbstractWorker {
-    onerror: (this: this, ev: ErrorEvent) => any;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-interface CanvasPathMethods {
-    arc(x: number, y: number, radius: number, startAngle: number, endAngle: number, anticlockwise?: boolean): void;
-    arcTo(x1: number, y1: number, x2: number, y2: number, radius: number): void;
-    bezierCurveTo(cp1x: number, cp1y: number, cp2x: number, cp2y: number, x: number, y: number): void;
-    closePath(): void;
-    ellipse(x: number, y: number, radiusX: number, radiusY: number, rotation: number, startAngle: number, endAngle: number, anticlockwise?: boolean): void;
-    lineTo(x: number, y: number): void;
-    moveTo(x: number, y: number): void;
-    quadraticCurveTo(cpx: number, cpy: number, x: number, y: number): void;
-    rect(x: number, y: number, w: number, h: number): void;
-}
-
-interface ChildNode {
-    remove(): void;
-}
-
-interface DOML2DeprecatedColorProperty {
-    color: string;
-}
-
-interface DOML2DeprecatedSizeProperty {
-    size: number;
-}
-
-interface DocumentEvent {
-    createEvent(eventInterface:"AnimationEvent"): AnimationEvent;
-    createEvent(eventInterface:"AriaRequestEvent"): AriaRequestEvent;
-    createEvent(eventInterface:"AudioProcessingEvent"): AudioProcessingEvent;
-    createEvent(eventInterface:"BeforeUnloadEvent"): BeforeUnloadEvent;
-    createEvent(eventInterface:"ClipboardEvent"): ClipboardEvent;
-    createEvent(eventInterface:"CloseEvent"): CloseEvent;
-    createEvent(eventInterface:"CommandEvent"): CommandEvent;
-    createEvent(eventInterface:"CompositionEvent"): CompositionEvent;
-    createEvent(eventInterface:"CustomEvent"): CustomEvent;
-    createEvent(eventInterface:"DeviceLightEvent"): DeviceLightEvent;
-    createEvent(eventInterface:"DeviceMotionEvent"): DeviceMotionEvent;
-    createEvent(eventInterface:"DeviceOrientationEvent"): DeviceOrientationEvent;
-    createEvent(eventInterface:"DragEvent"): DragEvent;
-    createEvent(eventInterface:"ErrorEvent"): ErrorEvent;
-    createEvent(eventInterface:"Event"): Event;
-    createEvent(eventInterface:"Events"): Event;
-    createEvent(eventInterface:"FocusEvent"): FocusEvent;
-    createEvent(eventInterface:"GamepadEvent"): GamepadEvent;
-    createEvent(eventInterface:"HashChangeEvent"): HashChangeEvent;
-    createEvent(eventInterface:"IDBVersionChangeEvent"): IDBVersionChangeEvent;
-    createEvent(eventInterface:"KeyboardEvent"): KeyboardEvent;
-    createEvent(eventInterface:"ListeningStateChangedEvent"): ListeningStateChangedEvent;
-    createEvent(eventInterface:"LongRunningScriptDetectedEvent"): LongRunningScriptDetectedEvent;
-    createEvent(eventInterface:"MSGestureEvent"): MSGestureEvent;
-    createEvent(eventInterface:"MSManipulationEvent"): MSManipulationEvent;
-    createEvent(eventInterface:"MSMediaKeyMessageEvent"): MSMediaKeyMessageEvent;
-    createEvent(eventInterface:"MSMediaKeyNeededEvent"): MSMediaKeyNeededEvent;
-    createEvent(eventInterface:"MSPointerEvent"): MSPointerEvent;
-    createEvent(eventInterface:"MSSiteModeEvent"): MSSiteModeEvent;
-    createEvent(eventInterface:"MediaEncryptedEvent"): MediaEncryptedEvent;
-    createEvent(eventInterface:"MediaKeyMessageEvent"): MediaKeyMessageEvent;
-    createEvent(eventInterface:"MediaStreamErrorEvent"): MediaStreamErrorEvent;
-    createEvent(eventInterface:"MediaStreamTrackEvent"): MediaStreamTrackEvent;
-    createEvent(eventInterface:"MessageEvent"): MessageEvent;
-    createEvent(eventInterface:"MouseEvent"): MouseEvent;
-    createEvent(eventInterface:"MouseEvents"): MouseEvent;
-    createEvent(eventInterface:"MutationEvent"): MutationEvent;
-    createEvent(eventInterface:"MutationEvents"): MutationEvent;
-    createEvent(eventInterface:"NavigationCompletedEvent"): NavigationCompletedEvent;
-    createEvent(eventInterface:"NavigationEvent"): NavigationEvent;
-    createEvent(eventInterface:"NavigationEventWithReferrer"): NavigationEventWithReferrer;
-    createEvent(eventInterface:"OfflineAudioCompletionEvent"): OfflineAudioCompletionEvent;
-    createEvent(eventInterface:"OverflowEvent"): OverflowEvent;
-    createEvent(eventInterface:"PageTransitionEvent"): PageTransitionEvent;
-    createEvent(eventInterface:"PermissionRequestedEvent"): PermissionRequestedEvent;
-    createEvent(eventInterface:"PointerEvent"): PointerEvent;
-    createEvent(eventInterface:"PopStateEvent"): PopStateEvent;
-    createEvent(eventInterface:"ProgressEvent"): ProgressEvent;
-    createEvent(eventInterface:"RTCDTMFToneChangeEvent"): RTCDTMFToneChangeEvent;
-    createEvent(eventInterface:"RTCDtlsTransportStateChangedEvent"): RTCDtlsTransportStateChangedEvent;
-    createEvent(eventInterface:"RTCIceCandidatePairChangedEvent"): RTCIceCandidatePairChangedEvent;
-    createEvent(eventInterface:"RTCIceGathererEvent"): RTCIceGathererEvent;
-    createEvent(eventInterface:"RTCIceTransportStateChangedEvent"): RTCIceTransportStateChangedEvent;
-    createEvent(eventInterface:"RTCSsrcConflictEvent"): RTCSsrcConflictEvent;
-    createEvent(eventInterface:"SVGZoomEvent"): SVGZoomEvent;
-    createEvent(eventInterface:"SVGZoomEvents"): SVGZoomEvent;
-    createEvent(eventInterface:"ScriptNotifyEvent"): ScriptNotifyEvent;
-    createEvent(eventInterface:"StorageEvent"): StorageEvent;
-    createEvent(eventInterface:"TextEvent"): TextEvent;
-    createEvent(eventInterface:"TouchEvent"): TouchEvent;
-    createEvent(eventInterface:"TrackEvent"): TrackEvent;
-    createEvent(eventInterface:"TransitionEvent"): TransitionEvent;
-    createEvent(eventInterface:"UIEvent"): UIEvent;
-    createEvent(eventInterface:"UIEvents"): UIEvent;
-    createEvent(eventInterface:"UnviewableContentIdentifiedEvent"): UnviewableContentIdentifiedEvent;
-    createEvent(eventInterface:"WebGLContextEvent"): WebGLContextEvent;
-    createEvent(eventInterface:"WheelEvent"): WheelEvent;
-    createEvent(eventInterface: string): Event;
-}
-
-interface ElementTraversal {
-    readonly childElementCount: number;
-    readonly firstElementChild: Element;
-    readonly lastElementChild: Element;
-    readonly nextElementSibling: Element;
-    readonly previousElementSibling: Element;
-}
-
-interface GetSVGDocument {
-    getSVGDocument(): Document;
-}
-
-interface GlobalEventHandlers {
-    onpointercancel: (this: this, ev: PointerEvent) => any;
-    onpointerdown: (this: this, ev: PointerEvent) => any;
-    onpointerenter: (this: this, ev: PointerEvent) => any;
-    onpointerleave: (this: this, ev: PointerEvent) => any;
-    onpointermove: (this: this, ev: PointerEvent) => any;
-    onpointerout: (this: this, ev: PointerEvent) => any;
-    onpointerover: (this: this, ev: PointerEvent) => any;
-    onpointerup: (this: this, ev: PointerEvent) => any;
-    onwheel: (this: this, ev: WheelEvent) => any;
-    addEventListener(type: "pointercancel", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerdown", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerenter", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerleave", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointermove", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerout", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerover", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerup", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "wheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-interface HTMLTableAlignment {
-    /**
-      * Sets or retrieves a value that you can use to implement your own ch functionality for the object.
-      */
-    ch: string;
-    /**
-      * Sets or retrieves a value that you can use to implement your own chOff functionality for the object.
-      */
-    chOff: string;
-    /**
-      * Sets or retrieves how text and other content are vertically aligned within the object that contains them.
-      */
-    vAlign: string;
-}
-
-interface IDBEnvironment {
-    readonly indexedDB: IDBFactory;
-}
-
-interface LinkStyle {
-    readonly sheet: StyleSheet;
-}
-
-interface MSBaseReader {
-    onabort: (this: this, ev: Event) => any;
-    onerror: (this: this, ev: ErrorEvent) => any;
-    onload: (this: this, ev: Event) => any;
-    onloadend: (this: this, ev: ProgressEvent) => any;
-    onloadstart: (this: this, ev: Event) => any;
-    onprogress: (this: this, ev: ProgressEvent) => any;
-    readonly readyState: number;
-    readonly result: any;
-    abort(): void;
-    readonly DONE: number;
-    readonly EMPTY: number;
-    readonly LOADING: number;
-    addEventListener(type: "abort", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadend", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "progress", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-interface MSFileSaver {
-    msSaveBlob(blob: any, defaultName?: string): boolean;
-    msSaveOrOpenBlob(blob: any, defaultName?: string): boolean;
-}
-
-interface MSNavigatorDoNotTrack {
-    confirmSiteSpecificTrackingException(args: ConfirmSiteSpecificExceptionsInformation): boolean;
-    confirmWebWideTrackingException(args: ExceptionInformation): boolean;
-    removeSiteSpecificTrackingException(args: ExceptionInformation): void;
-    removeWebWideTrackingException(args: ExceptionInformation): void;
-    storeSiteSpecificTrackingException(args: StoreSiteSpecificExceptionsInformation): void;
-    storeWebWideTrackingException(args: StoreExceptionsInformation): void;
-}
-
-interface NavigatorContentUtils {
-}
-
-interface NavigatorGeolocation {
-    readonly geolocation: Geolocation;
-}
-
-interface NavigatorID {
-    readonly appName: string;
-    readonly appVersion: string;
-    readonly platform: string;
-    readonly product: string;
-    readonly productSub: string;
-    readonly userAgent: string;
-    readonly vendor: string;
-    readonly vendorSub: string;
-}
-
-interface NavigatorOnLine {
-    readonly onLine: boolean;
-}
-
-interface NavigatorStorageUtils {
-}
-
-interface NavigatorUserMedia {
-    readonly mediaDevices: MediaDevices;
-    getUserMedia(constraints: MediaStreamConstraints, successCallback: NavigatorUserMediaSuccessCallback, errorCallback: NavigatorUserMediaErrorCallback): void;
-}
-
-interface NodeSelector {
-    querySelector(selectors: "a"): HTMLAnchorElement | null;
-    querySelector(selectors: "abbr"): HTMLElement | null;
-    querySelector(selectors: "acronym"): HTMLElement | null;
-    querySelector(selectors: "address"): HTMLElement | null;
-    querySelector(selectors: "applet"): HTMLAppletElement | null;
-    querySelector(selectors: "area"): HTMLAreaElement | null;
-    querySelector(selectors: "article"): HTMLElement | null;
-    querySelector(selectors: "aside"): HTMLElement | null;
-    querySelector(selectors: "audio"): HTMLAudioElement | null;
-    querySelector(selectors: "b"): HTMLElement | null;
-    querySelector(selectors: "base"): HTMLBaseElement | null;
-    querySelector(selectors: "basefont"): HTMLBaseFontElement | null;
-    querySelector(selectors: "bdo"): HTMLElement | null;
-    querySelector(selectors: "big"): HTMLElement | null;
-    querySelector(selectors: "blockquote"): HTMLQuoteElement | null;
-    querySelector(selectors: "body"): HTMLBodyElement | null;
-    querySelector(selectors: "br"): HTMLBRElement | null;
-    querySelector(selectors: "button"): HTMLButtonElement | null;
-    querySelector(selectors: "canvas"): HTMLCanvasElement | null;
-    querySelector(selectors: "caption"): HTMLTableCaptionElement | null;
-    querySelector(selectors: "center"): HTMLElement | null;
-    querySelector(selectors: "circle"): SVGCircleElement | null;
-    querySelector(selectors: "cite"): HTMLElement | null;
-    querySelector(selectors: "clippath"): SVGClipPathElement | null;
-    querySelector(selectors: "code"): HTMLElement | null;
-    querySelector(selectors: "col"): HTMLTableColElement | null;
-    querySelector(selectors: "colgroup"): HTMLTableColElement | null;
-    querySelector(selectors: "datalist"): HTMLDataListElement | null;
-    querySelector(selectors: "dd"): HTMLElement | null;
-    querySelector(selectors: "defs"): SVGDefsElement | null;
-    querySelector(selectors: "del"): HTMLModElement | null;
-    querySelector(selectors: "desc"): SVGDescElement | null;
-    querySelector(selectors: "dfn"): HTMLElement | null;
-    querySelector(selectors: "dir"): HTMLDirectoryElement | null;
-    querySelector(selectors: "div"): HTMLDivElement | null;
-    querySelector(selectors: "dl"): HTMLDListElement | null;
-    querySelector(selectors: "dt"): HTMLElement | null;
-    querySelector(selectors: "ellipse"): SVGEllipseElement | null;
-    querySelector(selectors: "em"): HTMLElement | null;
-    querySelector(selectors: "embed"): HTMLEmbedElement | null;
-    querySelector(selectors: "feblend"): SVGFEBlendElement | null;
-    querySelector(selectors: "fecolormatrix"): SVGFEColorMatrixElement | null;
-    querySelector(selectors: "fecomponenttransfer"): SVGFEComponentTransferElement | null;
-    querySelector(selectors: "fecomposite"): SVGFECompositeElement | null;
-    querySelector(selectors: "feconvolvematrix"): SVGFEConvolveMatrixElement | null;
-    querySelector(selectors: "fediffuselighting"): SVGFEDiffuseLightingElement | null;
-    querySelector(selectors: "fedisplacementmap"): SVGFEDisplacementMapElement | null;
-    querySelector(selectors: "fedistantlight"): SVGFEDistantLightElement | null;
-    querySelector(selectors: "feflood"): SVGFEFloodElement | null;
-    querySelector(selectors: "fefunca"): SVGFEFuncAElement | null;
-    querySelector(selectors: "fefuncb"): SVGFEFuncBElement | null;
-    querySelector(selectors: "fefuncg"): SVGFEFuncGElement | null;
-    querySelector(selectors: "fefuncr"): SVGFEFuncRElement | null;
-    querySelector(selectors: "fegaussianblur"): SVGFEGaussianBlurElement | null;
-    querySelector(selectors: "feimage"): SVGFEImageElement | null;
-    querySelector(selectors: "femerge"): SVGFEMergeElement | null;
-    querySelector(selectors: "femergenode"): SVGFEMergeNodeElement | null;
-    querySelector(selectors: "femorphology"): SVGFEMorphologyElement | null;
-    querySelector(selectors: "feoffset"): SVGFEOffsetElement | null;
-    querySelector(selectors: "fepointlight"): SVGFEPointLightElement | null;
-    querySelector(selectors: "fespecularlighting"): SVGFESpecularLightingElement | null;
-    querySelector(selectors: "fespotlight"): SVGFESpotLightElement | null;
-    querySelector(selectors: "fetile"): SVGFETileElement | null;
-    querySelector(selectors: "feturbulence"): SVGFETurbulenceElement | null;
-    querySelector(selectors: "fieldset"): HTMLFieldSetElement | null;
-    querySelector(selectors: "figcaption"): HTMLElement | null;
-    querySelector(selectors: "figure"): HTMLElement | null;
-    querySelector(selectors: "filter"): SVGFilterElement | null;
-    querySelector(selectors: "font"): HTMLFontElement | null;
-    querySelector(selectors: "footer"): HTMLElement | null;
-    querySelector(selectors: "foreignobject"): SVGForeignObjectElement | null;
-    querySelector(selectors: "form"): HTMLFormElement | null;
-    querySelector(selectors: "frame"): HTMLFrameElement | null;
-    querySelector(selectors: "frameset"): HTMLFrameSetElement | null;
-    querySelector(selectors: "g"): SVGGElement | null;
-    querySelector(selectors: "h1"): HTMLHeadingElement | null;
-    querySelector(selectors: "h2"): HTMLHeadingElement | null;
-    querySelector(selectors: "h3"): HTMLHeadingElement | null;
-    querySelector(selectors: "h4"): HTMLHeadingElement | null;
-    querySelector(selectors: "h5"): HTMLHeadingElement | null;
-    querySelector(selectors: "h6"): HTMLHeadingElement | null;
-    querySelector(selectors: "head"): HTMLHeadElement | null;
-    querySelector(selectors: "header"): HTMLElement | null;
-    querySelector(selectors: "hgroup"): HTMLElement | null;
-    querySelector(selectors: "hr"): HTMLHRElement | null;
-    querySelector(selectors: "html"): HTMLHtmlElement | null;
-    querySelector(selectors: "i"): HTMLElement | null;
-    querySelector(selectors: "iframe"): HTMLIFrameElement | null;
-    querySelector(selectors: "image"): SVGImageElement | null;
-    querySelector(selectors: "img"): HTMLImageElement | null;
-    querySelector(selectors: "input"): HTMLInputElement | null;
-    querySelector(selectors: "ins"): HTMLModElement | null;
-    querySelector(selectors: "isindex"): HTMLUnknownElement | null;
-    querySelector(selectors: "kbd"): HTMLElement | null;
-    querySelector(selectors: "keygen"): HTMLElement | null;
-    querySelector(selectors: "label"): HTMLLabelElement | null;
-    querySelector(selectors: "legend"): HTMLLegendElement | null;
-    querySelector(selectors: "li"): HTMLLIElement | null;
-    querySelector(selectors: "line"): SVGLineElement | null;
-    querySelector(selectors: "lineargradient"): SVGLinearGradientElement | null;
-    querySelector(selectors: "link"): HTMLLinkElement | null;
-    querySelector(selectors: "listing"): HTMLPreElement | null;
-    querySelector(selectors: "map"): HTMLMapElement | null;
-    querySelector(selectors: "mark"): HTMLElement | null;
-    querySelector(selectors: "marker"): SVGMarkerElement | null;
-    querySelector(selectors: "marquee"): HTMLMarqueeElement | null;
-    querySelector(selectors: "mask"): SVGMaskElement | null;
-    querySelector(selectors: "menu"): HTMLMenuElement | null;
-    querySelector(selectors: "meta"): HTMLMetaElement | null;
-    querySelector(selectors: "metadata"): SVGMetadataElement | null;
-    querySelector(selectors: "meter"): HTMLMeterElement | null;
-    querySelector(selectors: "nav"): HTMLElement | null;
-    querySelector(selectors: "nextid"): HTMLUnknownElement | null;
-    querySelector(selectors: "nobr"): HTMLElement | null;
-    querySelector(selectors: "noframes"): HTMLElement | null;
-    querySelector(selectors: "noscript"): HTMLElement | null;
-    querySelector(selectors: "object"): HTMLObjectElement | null;
-    querySelector(selectors: "ol"): HTMLOListElement | null;
-    querySelector(selectors: "optgroup"): HTMLOptGroupElement | null;
-    querySelector(selectors: "option"): HTMLOptionElement | null;
-    querySelector(selectors: "p"): HTMLParagraphElement | null;
-    querySelector(selectors: "param"): HTMLParamElement | null;
-    querySelector(selectors: "path"): SVGPathElement | null;
-    querySelector(selectors: "pattern"): SVGPatternElement | null;
-    querySelector(selectors: "picture"): HTMLPictureElement | null;
-    querySelector(selectors: "plaintext"): HTMLElement | null;
-    querySelector(selectors: "polygon"): SVGPolygonElement | null;
-    querySelector(selectors: "polyline"): SVGPolylineElement | null;
-    querySelector(selectors: "pre"): HTMLPreElement | null;
-    querySelector(selectors: "progress"): HTMLProgressElement | null;
-    querySelector(selectors: "q"): HTMLQuoteElement | null;
-    querySelector(selectors: "radialgradient"): SVGRadialGradientElement | null;
-    querySelector(selectors: "rect"): SVGRectElement | null;
-    querySelector(selectors: "rt"): HTMLElement | null;
-    querySelector(selectors: "ruby"): HTMLElement | null;
-    querySelector(selectors: "s"): HTMLElement | null;
-    querySelector(selectors: "samp"): HTMLElement | null;
-    querySelector(selectors: "script"): HTMLScriptElement | null;
-    querySelector(selectors: "section"): HTMLElement | null;
-    querySelector(selectors: "select"): HTMLSelectElement | null;
-    querySelector(selectors: "small"): HTMLElement | null;
-    querySelector(selectors: "source"): HTMLSourceElement | null;
-    querySelector(selectors: "span"): HTMLSpanElement | null;
-    querySelector(selectors: "stop"): SVGStopElement | null;
-    querySelector(selectors: "strike"): HTMLElement | null;
-    querySelector(selectors: "strong"): HTMLElement | null;
-    querySelector(selectors: "style"): HTMLStyleElement | null;
-    querySelector(selectors: "sub"): HTMLElement | null;
-    querySelector(selectors: "sup"): HTMLElement | null;
-    querySelector(selectors: "svg"): SVGSVGElement | null;
-    querySelector(selectors: "switch"): SVGSwitchElement | null;
-    querySelector(selectors: "symbol"): SVGSymbolElement | null;
-    querySelector(selectors: "table"): HTMLTableElement | null;
-    querySelector(selectors: "tbody"): HTMLTableSectionElement | null;
-    querySelector(selectors: "td"): HTMLTableDataCellElement | null;
-    querySelector(selectors: "template"): HTMLTemplateElement | null;
-    querySelector(selectors: "text"): SVGTextElement | null;
-    querySelector(selectors: "textpath"): SVGTextPathElement | null;
-    querySelector(selectors: "textarea"): HTMLTextAreaElement | null;
-    querySelector(selectors: "tfoot"): HTMLTableSectionElement | null;
-    querySelector(selectors: "th"): HTMLTableHeaderCellElement | null;
-    querySelector(selectors: "thead"): HTMLTableSectionElement | null;
-    querySelector(selectors: "title"): HTMLTitleElement | null;
-    querySelector(selectors: "tr"): HTMLTableRowElement | null;
-    querySelector(selectors: "track"): HTMLTrackElement | null;
-    querySelector(selectors: "tspan"): SVGTSpanElement | null;
-    querySelector(selectors: "tt"): HTMLElement | null;
-    querySelector(selectors: "u"): HTMLElement | null;
-    querySelector(selectors: "ul"): HTMLUListElement | null;
-    querySelector(selectors: "use"): SVGUseElement | null;
-    querySelector(selectors: "var"): HTMLElement | null;
-    querySelector(selectors: "video"): HTMLVideoElement | null;
-    querySelector(selectors: "view"): SVGViewElement | null;
-    querySelector(selectors: "wbr"): HTMLElement | null;
-    querySelector(selectors: "x-ms-webview"): MSHTMLWebViewElement | null;
-    querySelector(selectors: "xmp"): HTMLPreElement | null;
-    querySelector(selectors: string): Element | null;
-    querySelectorAll(selectors: "a"): NodeListOf<HTMLAnchorElement>;
-    querySelectorAll(selectors: "abbr"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "acronym"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "address"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "applet"): NodeListOf<HTMLAppletElement>;
-    querySelectorAll(selectors: "area"): NodeListOf<HTMLAreaElement>;
-    querySelectorAll(selectors: "article"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "aside"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "audio"): NodeListOf<HTMLAudioElement>;
-    querySelectorAll(selectors: "b"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "base"): NodeListOf<HTMLBaseElement>;
-    querySelectorAll(selectors: "basefont"): NodeListOf<HTMLBaseFontElement>;
-    querySelectorAll(selectors: "bdo"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "big"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "blockquote"): NodeListOf<HTMLQuoteElement>;
-    querySelectorAll(selectors: "body"): NodeListOf<HTMLBodyElement>;
-    querySelectorAll(selectors: "br"): NodeListOf<HTMLBRElement>;
-    querySelectorAll(selectors: "button"): NodeListOf<HTMLButtonElement>;
-    querySelectorAll(selectors: "canvas"): NodeListOf<HTMLCanvasElement>;
-    querySelectorAll(selectors: "caption"): NodeListOf<HTMLTableCaptionElement>;
-    querySelectorAll(selectors: "center"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "circle"): NodeListOf<SVGCircleElement>;
-    querySelectorAll(selectors: "cite"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "clippath"): NodeListOf<SVGClipPathElement>;
-    querySelectorAll(selectors: "code"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "col"): NodeListOf<HTMLTableColElement>;
-    querySelectorAll(selectors: "colgroup"): NodeListOf<HTMLTableColElement>;
-    querySelectorAll(selectors: "datalist"): NodeListOf<HTMLDataListElement>;
-    querySelectorAll(selectors: "dd"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "defs"): NodeListOf<SVGDefsElement>;
-    querySelectorAll(selectors: "del"): NodeListOf<HTMLModElement>;
-    querySelectorAll(selectors: "desc"): NodeListOf<SVGDescElement>;
-    querySelectorAll(selectors: "dfn"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "dir"): NodeListOf<HTMLDirectoryElement>;
-    querySelectorAll(selectors: "div"): NodeListOf<HTMLDivElement>;
-    querySelectorAll(selectors: "dl"): NodeListOf<HTMLDListElement>;
-    querySelectorAll(selectors: "dt"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "ellipse"): NodeListOf<SVGEllipseElement>;
-    querySelectorAll(selectors: "em"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "embed"): NodeListOf<HTMLEmbedElement>;
-    querySelectorAll(selectors: "feblend"): NodeListOf<SVGFEBlendElement>;
-    querySelectorAll(selectors: "fecolormatrix"): NodeListOf<SVGFEColorMatrixElement>;
-    querySelectorAll(selectors: "fecomponenttransfer"): NodeListOf<SVGFEComponentTransferElement>;
-    querySelectorAll(selectors: "fecomposite"): NodeListOf<SVGFECompositeElement>;
-    querySelectorAll(selectors: "feconvolvematrix"): NodeListOf<SVGFEConvolveMatrixElement>;
-    querySelectorAll(selectors: "fediffuselighting"): NodeListOf<SVGFEDiffuseLightingElement>;
-    querySelectorAll(selectors: "fedisplacementmap"): NodeListOf<SVGFEDisplacementMapElement>;
-    querySelectorAll(selectors: "fedistantlight"): NodeListOf<SVGFEDistantLightElement>;
-    querySelectorAll(selectors: "feflood"): NodeListOf<SVGFEFloodElement>;
-    querySelectorAll(selectors: "fefunca"): NodeListOf<SVGFEFuncAElement>;
-    querySelectorAll(selectors: "fefuncb"): NodeListOf<SVGFEFuncBElement>;
-    querySelectorAll(selectors: "fefuncg"): NodeListOf<SVGFEFuncGElement>;
-    querySelectorAll(selectors: "fefuncr"): NodeListOf<SVGFEFuncRElement>;
-    querySelectorAll(selectors: "fegaussianblur"): NodeListOf<SVGFEGaussianBlurElement>;
-    querySelectorAll(selectors: "feimage"): NodeListOf<SVGFEImageElement>;
-    querySelectorAll(selectors: "femerge"): NodeListOf<SVGFEMergeElement>;
-    querySelectorAll(selectors: "femergenode"): NodeListOf<SVGFEMergeNodeElement>;
-    querySelectorAll(selectors: "femorphology"): NodeListOf<SVGFEMorphologyElement>;
-    querySelectorAll(selectors: "feoffset"): NodeListOf<SVGFEOffsetElement>;
-    querySelectorAll(selectors: "fepointlight"): NodeListOf<SVGFEPointLightElement>;
-    querySelectorAll(selectors: "fespecularlighting"): NodeListOf<SVGFESpecularLightingElement>;
-    querySelectorAll(selectors: "fespotlight"): NodeListOf<SVGFESpotLightElement>;
-    querySelectorAll(selectors: "fetile"): NodeListOf<SVGFETileElement>;
-    querySelectorAll(selectors: "feturbulence"): NodeListOf<SVGFETurbulenceElement>;
-    querySelectorAll(selectors: "fieldset"): NodeListOf<HTMLFieldSetElement>;
-    querySelectorAll(selectors: "figcaption"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "figure"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "filter"): NodeListOf<SVGFilterElement>;
-    querySelectorAll(selectors: "font"): NodeListOf<HTMLFontElement>;
-    querySelectorAll(selectors: "footer"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "foreignobject"): NodeListOf<SVGForeignObjectElement>;
-    querySelectorAll(selectors: "form"): NodeListOf<HTMLFormElement>;
-    querySelectorAll(selectors: "frame"): NodeListOf<HTMLFrameElement>;
-    querySelectorAll(selectors: "frameset"): NodeListOf<HTMLFrameSetElement>;
-    querySelectorAll(selectors: "g"): NodeListOf<SVGGElement>;
-    querySelectorAll(selectors: "h1"): NodeListOf<HTMLHeadingElement>;
-    querySelectorAll(selectors: "h2"): NodeListOf<HTMLHeadingElement>;
-    querySelectorAll(selectors: "h3"): NodeListOf<HTMLHeadingElement>;
-    querySelectorAll(selectors: "h4"): NodeListOf<HTMLHeadingElement>;
-    querySelectorAll(selectors: "h5"): NodeListOf<HTMLHeadingElement>;
-    querySelectorAll(selectors: "h6"): NodeListOf<HTMLHeadingElement>;
-    querySelectorAll(selectors: "head"): NodeListOf<HTMLHeadElement>;
-    querySelectorAll(selectors: "header"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "hgroup"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "hr"): NodeListOf<HTMLHRElement>;
-    querySelectorAll(selectors: "html"): NodeListOf<HTMLHtmlElement>;
-    querySelectorAll(selectors: "i"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "iframe"): NodeListOf<HTMLIFrameElement>;
-    querySelectorAll(selectors: "image"): NodeListOf<SVGImageElement>;
-    querySelectorAll(selectors: "img"): NodeListOf<HTMLImageElement>;
-    querySelectorAll(selectors: "input"): NodeListOf<HTMLInputElement>;
-    querySelectorAll(selectors: "ins"): NodeListOf<HTMLModElement>;
-    querySelectorAll(selectors: "isindex"): NodeListOf<HTMLUnknownElement>;
-    querySelectorAll(selectors: "kbd"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "keygen"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "label"): NodeListOf<HTMLLabelElement>;
-    querySelectorAll(selectors: "legend"): NodeListOf<HTMLLegendElement>;
-    querySelectorAll(selectors: "li"): NodeListOf<HTMLLIElement>;
-    querySelectorAll(selectors: "line"): NodeListOf<SVGLineElement>;
-    querySelectorAll(selectors: "lineargradient"): NodeListOf<SVGLinearGradientElement>;
-    querySelectorAll(selectors: "link"): NodeListOf<HTMLLinkElement>;
-    querySelectorAll(selectors: "listing"): NodeListOf<HTMLPreElement>;
-    querySelectorAll(selectors: "map"): NodeListOf<HTMLMapElement>;
-    querySelectorAll(selectors: "mark"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "marker"): NodeListOf<SVGMarkerElement>;
-    querySelectorAll(selectors: "marquee"): NodeListOf<HTMLMarqueeElement>;
-    querySelectorAll(selectors: "mask"): NodeListOf<SVGMaskElement>;
-    querySelectorAll(selectors: "menu"): NodeListOf<HTMLMenuElement>;
-    querySelectorAll(selectors: "meta"): NodeListOf<HTMLMetaElement>;
-    querySelectorAll(selectors: "metadata"): NodeListOf<SVGMetadataElement>;
-    querySelectorAll(selectors: "meter"): NodeListOf<HTMLMeterElement>;
-    querySelectorAll(selectors: "nav"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "nextid"): NodeListOf<HTMLUnknownElement>;
-    querySelectorAll(selectors: "nobr"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "noframes"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "noscript"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "object"): NodeListOf<HTMLObjectElement>;
-    querySelectorAll(selectors: "ol"): NodeListOf<HTMLOListElement>;
-    querySelectorAll(selectors: "optgroup"): NodeListOf<HTMLOptGroupElement>;
-    querySelectorAll(selectors: "option"): NodeListOf<HTMLOptionElement>;
-    querySelectorAll(selectors: "p"): NodeListOf<HTMLParagraphElement>;
-    querySelectorAll(selectors: "param"): NodeListOf<HTMLParamElement>;
-    querySelectorAll(selectors: "path"): NodeListOf<SVGPathElement>;
-    querySelectorAll(selectors: "pattern"): NodeListOf<SVGPatternElement>;
-    querySelectorAll(selectors: "picture"): NodeListOf<HTMLPictureElement>;
-    querySelectorAll(selectors: "plaintext"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "polygon"): NodeListOf<SVGPolygonElement>;
-    querySelectorAll(selectors: "polyline"): NodeListOf<SVGPolylineElement>;
-    querySelectorAll(selectors: "pre"): NodeListOf<HTMLPreElement>;
-    querySelectorAll(selectors: "progress"): NodeListOf<HTMLProgressElement>;
-    querySelectorAll(selectors: "q"): NodeListOf<HTMLQuoteElement>;
-    querySelectorAll(selectors: "radialgradient"): NodeListOf<SVGRadialGradientElement>;
-    querySelectorAll(selectors: "rect"): NodeListOf<SVGRectElement>;
-    querySelectorAll(selectors: "rt"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "ruby"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "s"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "samp"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "script"): NodeListOf<HTMLScriptElement>;
-    querySelectorAll(selectors: "section"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "select"): NodeListOf<HTMLSelectElement>;
-    querySelectorAll(selectors: "small"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "source"): NodeListOf<HTMLSourceElement>;
-    querySelectorAll(selectors: "span"): NodeListOf<HTMLSpanElement>;
-    querySelectorAll(selectors: "stop"): NodeListOf<SVGStopElement>;
-    querySelectorAll(selectors: "strike"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "strong"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "style"): NodeListOf<HTMLStyleElement>;
-    querySelectorAll(selectors: "sub"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "sup"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "svg"): NodeListOf<SVGSVGElement>;
-    querySelectorAll(selectors: "switch"): NodeListOf<SVGSwitchElement>;
-    querySelectorAll(selectors: "symbol"): NodeListOf<SVGSymbolElement>;
-    querySelectorAll(selectors: "table"): NodeListOf<HTMLTableElement>;
-    querySelectorAll(selectors: "tbody"): NodeListOf<HTMLTableSectionElement>;
-    querySelectorAll(selectors: "td"): NodeListOf<HTMLTableDataCellElement>;
-    querySelectorAll(selectors: "template"): NodeListOf<HTMLTemplateElement>;
-    querySelectorAll(selectors: "text"): NodeListOf<SVGTextElement>;
-    querySelectorAll(selectors: "textpath"): NodeListOf<SVGTextPathElement>;
-    querySelectorAll(selectors: "textarea"): NodeListOf<HTMLTextAreaElement>;
-    querySelectorAll(selectors: "tfoot"): NodeListOf<HTMLTableSectionElement>;
-    querySelectorAll(selectors: "th"): NodeListOf<HTMLTableHeaderCellElement>;
-    querySelectorAll(selectors: "thead"): NodeListOf<HTMLTableSectionElement>;
-    querySelectorAll(selectors: "title"): NodeListOf<HTMLTitleElement>;
-    querySelectorAll(selectors: "tr"): NodeListOf<HTMLTableRowElement>;
-    querySelectorAll(selectors: "track"): NodeListOf<HTMLTrackElement>;
-    querySelectorAll(selectors: "tspan"): NodeListOf<SVGTSpanElement>;
-    querySelectorAll(selectors: "tt"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "u"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "ul"): NodeListOf<HTMLUListElement>;
-    querySelectorAll(selectors: "use"): NodeListOf<SVGUseElement>;
-    querySelectorAll(selectors: "var"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "video"): NodeListOf<HTMLVideoElement>;
-    querySelectorAll(selectors: "view"): NodeListOf<SVGViewElement>;
-    querySelectorAll(selectors: "wbr"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "x-ms-webview"): NodeListOf<MSHTMLWebViewElement>;
-    querySelectorAll(selectors: "xmp"): NodeListOf<HTMLPreElement>;
-    querySelectorAll(selectors: string): NodeListOf<Element>;
-}
-
-interface RandomSource {
-    getRandomValues(array: ArrayBufferView): ArrayBufferView;
-}
-
-interface SVGAnimatedPathData {
-    readonly pathSegList: SVGPathSegList;
-}
-
-interface SVGAnimatedPoints {
-    readonly animatedPoints: SVGPointList;
-    readonly points: SVGPointList;
-}
-
-interface SVGExternalResourcesRequired {
-    readonly externalResourcesRequired: SVGAnimatedBoolean;
-}
-
-interface SVGFilterPrimitiveStandardAttributes extends SVGStylable {
-    readonly height: SVGAnimatedLength;
-    readonly result: SVGAnimatedString;
-    readonly width: SVGAnimatedLength;
-    readonly x: SVGAnimatedLength;
-    readonly y: SVGAnimatedLength;
-}
-
-interface SVGFitToViewBox {
-    readonly preserveAspectRatio: SVGAnimatedPreserveAspectRatio;
-    readonly viewBox: SVGAnimatedRect;
-}
-
-interface SVGLangSpace {
-    xmllang: string;
-    xmlspace: string;
-}
-
-interface SVGLocatable {
-    readonly farthestViewportElement: SVGElement;
-    readonly nearestViewportElement: SVGElement;
-    getBBox(): SVGRect;
-    getCTM(): SVGMatrix;
-    getScreenCTM(): SVGMatrix;
-    getTransformToElement(element: SVGElement): SVGMatrix;
-}
-
-interface SVGStylable {
-    className: any;
-    readonly style: CSSStyleDeclaration;
-}
-
-interface SVGTests {
-    readonly requiredExtensions: SVGStringList;
-    readonly requiredFeatures: SVGStringList;
-    readonly systemLanguage: SVGStringList;
-    hasExtension(extension: string): boolean;
-}
-
-interface SVGTransformable extends SVGLocatable {
-    readonly transform: SVGAnimatedTransformList;
-}
-
-interface SVGURIReference {
-    readonly href: SVGAnimatedString;
-}
-
-interface WindowBase64 {
-    atob(encodedString: string): string;
-    btoa(rawString: string): string;
-}
-
-interface WindowConsole {
-    readonly console: Console;
-}
-
-interface WindowLocalStorage {
-    readonly localStorage: Storage;
-}
-
-interface WindowSessionStorage {
-    readonly sessionStorage: Storage;
-}
-
-interface WindowTimers extends Object, WindowTimersExtension {
-    clearInterval(handle: number): void;
-    clearTimeout(handle: number): void;
-    setInterval(handler: (...args: any[]) => void, timeout: number): number;
-    setInterval(handler: any, timeout?: any, ...args: any[]): number;
-    setTimeout(handler: (...args: any[]) => void, timeout: number): number;
-    setTimeout(handler: any, timeout?: any, ...args: any[]): number;
-}
-
-interface WindowTimersExtension {
-    clearImmediate(handle: number): void;
-    setImmediate(handler: (...args: any[]) => void): number;
-    setImmediate(handler: any, ...args: any[]): number;
-}
-
-interface XMLHttpRequestEventTarget {
-    onabort: (this: this, ev: Event) => any;
-    onerror: (this: this, ev: ErrorEvent) => any;
-    onload: (this: this, ev: Event) => any;
-    onloadend: (this: this, ev: ProgressEvent) => any;
-    onloadstart: (this: this, ev: Event) => any;
-    onprogress: (this: this, ev: ProgressEvent) => any;
-    ontimeout: (this: this, ev: ProgressEvent) => any;
-    addEventListener(type: "abort", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadend", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "progress", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "timeout", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-interface StorageEventInit extends EventInit {
-    key?: string;
-    oldValue?: string;
-    newValue?: string;
-    url: string;
-    storageArea?: Storage;
-}
-
-interface Canvas2DContextAttributes {
-    alpha?: boolean;
-    willReadFrequently?: boolean;
-    storage?: boolean;
-    [attribute: string]: boolean | string | undefined;
-}
-
-interface NodeListOf<TNode extends Node> extends NodeList {
-    length: number;
-    item(index: number): TNode;
-    [index: number]: TNode;
-}
-
-interface HTMLCollectionOf<T extends Element> extends HTMLCollection {
-    item(index: number): T;
-    namedItem(name: string): T;
-    [index: number]: T;
-}
-
-interface BlobPropertyBag {
-    type?: string;
-    endings?: string;
-}
-
-interface FilePropertyBag {
-    type?: string;
-    lastModified?: number;
-}
-
-interface EventListenerObject {
-    handleEvent(evt: Event): void;
-}
-
-interface MessageEventInit extends EventInit {
-    data?: any;
-    origin?: string;
-    lastEventId?: string;
-    channel?: string;
-    source?: any;
-    ports?: MessagePort[];
-}
-
-interface ProgressEventInit extends EventInit {
-    lengthComputable?: boolean;
-    loaded?: number;
-    total?: number;
-}
-
-interface ScrollOptions {
-    behavior?: ScrollBehavior;
-}
-
-interface ScrollToOptions extends ScrollOptions {
-    left?: number;
-    top?: number;
-}
-
-interface ScrollIntoViewOptions extends ScrollOptions {
-    block?: ScrollLogicalPosition;
-    inline?: ScrollLogicalPosition;
-}
-
-interface ClipboardEventInit extends EventInit {
-    data?: string;
-    dataType?: string;
-}
-
-interface IDBArrayKey extends Array<IDBValidKey> {
-}
-
-interface RsaKeyGenParams extends Algorithm {
-    modulusLength: number;
-    publicExponent: Uint8Array;
-}
-
-interface RsaHashedKeyGenParams extends RsaKeyGenParams {
-    hash: AlgorithmIdentifier;
-}
-
-interface RsaKeyAlgorithm extends KeyAlgorithm {
-    modulusLength: number;
-    publicExponent: Uint8Array;
-}
-
-interface RsaHashedKeyAlgorithm extends RsaKeyAlgorithm {
-    hash: AlgorithmIdentifier;
-}
-
-interface RsaHashedImportParams {
-    hash: AlgorithmIdentifier;
-}
-
-interface RsaPssParams {
-    saltLength: number;
-}
-
-interface RsaOaepParams extends Algorithm {
-    label?: BufferSource;
-}
-
-interface EcdsaParams extends Algorithm {
-    hash: AlgorithmIdentifier;
-}
-
-interface EcKeyGenParams extends Algorithm {
-    namedCurve: string;
-}
-
-interface EcKeyAlgorithm extends KeyAlgorithm {
-    typedCurve: string;
-}
-
-interface EcKeyImportParams {
-    namedCurve: string;
-}
-
-interface EcdhKeyDeriveParams extends Algorithm {
-    public: CryptoKey;
-}
-
-interface AesCtrParams extends Algorithm {
-    counter: BufferSource;
-    length: number;
-}
-
-interface AesKeyAlgorithm extends KeyAlgorithm {
-    length: number;
-}
-
-interface AesKeyGenParams extends Algorithm {
-    length: number;
-}
-
-interface AesDerivedKeyParams extends Algorithm {
-    length: number;
-}
-
-interface AesCbcParams extends Algorithm {
-    iv: BufferSource;
-}
-
-interface AesCmacParams extends Algorithm {
-    length: number;
-}
-
-interface AesGcmParams extends Algorithm {
-    iv: BufferSource;
-    additionalData?: BufferSource;
-    tagLength?: number;
-}
-
-interface AesCfbParams extends Algorithm {
-    iv: BufferSource;
-}
-
-interface HmacImportParams extends Algorithm {
-    hash?: AlgorithmIdentifier;
-    length?: number;
-}
-
-interface HmacKeyAlgorithm extends KeyAlgorithm {
-    hash: AlgorithmIdentifier;
-    length: number;
-}
-
-interface HmacKeyGenParams extends Algorithm {
-    hash: AlgorithmIdentifier;
-    length?: number;
-}
-
-interface DhKeyGenParams extends Algorithm {
-    prime: Uint8Array;
-    generator: Uint8Array;
-}
-
-interface DhKeyAlgorithm extends KeyAlgorithm {
-    prime: Uint8Array;
-    generator: Uint8Array;
-}
-
-interface DhKeyDeriveParams extends Algorithm {
-    public: CryptoKey;
-}
-
-interface DhImportKeyParams extends Algorithm {
-    prime: Uint8Array;
-    generator: Uint8Array;
-}
-
-interface ConcatParams extends Algorithm {
-    hash?: AlgorithmIdentifier;
-    algorithmId: Uint8Array;
-    partyUInfo: Uint8Array;
-    partyVInfo: Uint8Array;
-    publicInfo?: Uint8Array;
-    privateInfo?: Uint8Array;
-}
-
-interface HkdfCtrParams extends Algorithm {
-    hash: AlgorithmIdentifier;
-    label: BufferSource;
-    context: BufferSource;
-}
-
-interface Pbkdf2Params extends Algorithm {
-    salt: BufferSource;
-    iterations: number;
-    hash: AlgorithmIdentifier;
-}
-
-interface RsaOtherPrimesInfo {
-    r: string;
-    d: string;
-    t: string;
-}
-
-interface JsonWebKey {
-    kty: string;
-    use?: string;
-    key_ops?: string[];
-    alg?: string;
-    kid?: string;
-    x5u?: string;
-    x5c?: string;
-    x5t?: string;
-    ext?: boolean;
-    crv?: string;
-    x?: string;
-    y?: string;
-    d?: string;
-    n?: string;
-    e?: string;
-    p?: string;
-    q?: string;
-    dp?: string;
-    dq?: string;
-    qi?: string;
-    oth?: RsaOtherPrimesInfo[];
-    k?: string;
-}
-
-interface ParentNode {
-    readonly children: HTMLCollection;
-    readonly firstElementChild: Element;
-    readonly lastElementChild: Element;
-    readonly childElementCount: number;
-}
-
-declare type EventListenerOrEventListenerObject = EventListener | EventListenerObject;
-
-interface ErrorEventHandler {
-    (message: string, filename?: string, lineno?: number, colno?: number, error?:Error): void;
-}
-interface PositionCallback {
-    (position: Position): void;
-}
-interface PositionErrorCallback {
-    (error: PositionError): void;
-}
-interface MediaQueryListListener {
-    (mql: MediaQueryList): void;
-}
-interface MSLaunchUriCallback {
-    (): void;
-}
-interface FrameRequestCallback {
-    (time: number): void;
-}
-interface MSUnsafeFunctionCallback {
-    (): any;
-}
-interface MSExecAtPriorityFunctionCallback {
-    (...args: any[]): any;
-}
-interface MutationCallback {
-    (mutations: MutationRecord[], observer: MutationObserver): void;
-}
-interface DecodeSuccessCallback {
-    (decodedData: AudioBuffer): void;
-}
-interface DecodeErrorCallback {
-    (error: DOMException): void;
-}
-interface FunctionStringCallback {
-    (data: string): void;
-}
-interface NavigatorUserMediaSuccessCallback {
-    (stream: MediaStream): void;
-}
-interface NavigatorUserMediaErrorCallback {
-    (error: MediaStreamError): void;
-}
-interface ForEachCallback {
-    (keyId: any, status: string): void;
-}
-declare var Audio: {new(src?: string): HTMLAudioElement; };
-declare var Image: {new(width?: number, height?: number): HTMLImageElement; };
-declare var Option: {new(text?: string, value?: string, defaultSelected?: boolean, selected?: boolean): HTMLOptionElement; };
-declare var applicationCache: ApplicationCache;
-declare var clientInformation: Navigator;
-declare var closed: boolean;
-declare var crypto: Crypto;
-declare var defaultStatus: string;
-declare var devicePixelRatio: number;
-declare var doNotTrack: string;
-declare var document: Document;
-declare var event: Event;
-declare var external: External;
-declare var frameElement: Element;
-declare var frames: Window;
-declare var history: History;
-declare var innerHeight: number;
-declare var innerWidth: number;
-declare var length: number;
-declare var location: Location;
-declare var locationbar: BarProp;
-declare var menubar: BarProp;
-declare var msCredentials: MSCredentials;
-declare const name: never;
-declare var navigator: Navigator;
-declare var offscreenBuffering: string | boolean;
-declare var onabort: (this: Window, ev: UIEvent) => any;
-declare var onafterprint: (this: Window, ev: Event) => any;
-declare var onbeforeprint: (this: Window, ev: Event) => any;
-declare var onbeforeunload: (this: Window, ev: BeforeUnloadEvent) => any;
-declare var onblur: (this: Window, ev: FocusEvent) => any;
-declare var oncanplay: (this: Window, ev: Event) => any;
-declare var oncanplaythrough: (this: Window, ev: Event) => any;
-declare var onchange: (this: Window, ev: Event) => any;
-declare var onclick: (this: Window, ev: MouseEvent) => any;
-declare var oncompassneedscalibration: (this: Window, ev: Event) => any;
-declare var oncontextmenu: (this: Window, ev: PointerEvent) => any;
-declare var ondblclick: (this: Window, ev: MouseEvent) => any;
-declare var ondevicelight: (this: Window, ev: DeviceLightEvent) => any;
-declare var ondevicemotion: (this: Window, ev: DeviceMotionEvent) => any;
-declare var ondeviceorientation: (this: Window, ev: DeviceOrientationEvent) => any;
-declare var ondrag: (this: Window, ev: DragEvent) => any;
-declare var ondragend: (this: Window, ev: DragEvent) => any;
-declare var ondragenter: (this: Window, ev: DragEvent) => any;
-declare var ondragleave: (this: Window, ev: DragEvent) => any;
-declare var ondragover: (this: Window, ev: DragEvent) => any;
-declare var ondragstart: (this: Window, ev: DragEvent) => any;
-declare var ondrop: (this: Window, ev: DragEvent) => any;
-declare var ondurationchange: (this: Window, ev: Event) => any;
-declare var onemptied: (this: Window, ev: Event) => any;
-declare var onended: (this: Window, ev: MediaStreamErrorEvent) => any;
-declare var onerror: ErrorEventHandler;
-declare var onfocus: (this: Window, ev: FocusEvent) => any;
-declare var onhashchange: (this: Window, ev: HashChangeEvent) => any;
-declare var oninput: (this: Window, ev: Event) => any;
-declare var oninvalid: (this: Window, ev: Event) => any;
-declare var onkeydown: (this: Window, ev: KeyboardEvent) => any;
-declare var onkeypress: (this: Window, ev: KeyboardEvent) => any;
-declare var onkeyup: (this: Window, ev: KeyboardEvent) => any;
-declare var onload: (this: Window, ev: Event) => any;
-declare var onloadeddata: (this: Window, ev: Event) => any;
-declare var onloadedmetadata: (this: Window, ev: Event) => any;
-declare var onloadstart: (this: Window, ev: Event) => any;
-declare var onmessage: (this: Window, ev: MessageEvent) => any;
-declare var onmousedown: (this: Window, ev: MouseEvent) => any;
-declare var onmouseenter: (this: Window, ev: MouseEvent) => any;
-declare var onmouseleave: (this: Window, ev: MouseEvent) => any;
-declare var onmousemove: (this: Window, ev: MouseEvent) => any;
-declare var onmouseout: (this: Window, ev: MouseEvent) => any;
-declare var onmouseover: (this: Window, ev: MouseEvent) => any;
-declare var onmouseup: (this: Window, ev: MouseEvent) => any;
-declare var onmousewheel: (this: Window, ev: WheelEvent) => any;
-declare var onmsgesturechange: (this: Window, ev: MSGestureEvent) => any;
-declare var onmsgesturedoubletap: (this: Window, ev: MSGestureEvent) => any;
-declare var onmsgestureend: (this: Window, ev: MSGestureEvent) => any;
-declare var onmsgesturehold: (this: Window, ev: MSGestureEvent) => any;
-declare var onmsgesturestart: (this: Window, ev: MSGestureEvent) => any;
-declare var onmsgesturetap: (this: Window, ev: MSGestureEvent) => any;
-declare var onmsinertiastart: (this: Window, ev: MSGestureEvent) => any;
-declare var onmspointercancel: (this: Window, ev: MSPointerEvent) => any;
-declare var onmspointerdown: (this: Window, ev: MSPointerEvent) => any;
-declare var onmspointerenter: (this: Window, ev: MSPointerEvent) => any;
-declare var onmspointerleave: (this: Window, ev: MSPointerEvent) => any;
-declare var onmspointermove: (this: Window, ev: MSPointerEvent) => any;
-declare var onmspointerout: (this: Window, ev: MSPointerEvent) => any;
-declare var onmspointerover: (this: Window, ev: MSPointerEvent) => any;
-declare var onmspointerup: (this: Window, ev: MSPointerEvent) => any;
-declare var onoffline: (this: Window, ev: Event) => any;
-declare var ononline: (this: Window, ev: Event) => any;
-declare var onorientationchange: (this: Window, ev: Event) => any;
-declare var onpagehide: (this: Window, ev: PageTransitionEvent) => any;
-declare var onpageshow: (this: Window, ev: PageTransitionEvent) => any;
-declare var onpause: (this: Window, ev: Event) => any;
-declare var onplay: (this: Window, ev: Event) => any;
-declare var onplaying: (this: Window, ev: Event) => any;
-declare var onpopstate: (this: Window, ev: PopStateEvent) => any;
-declare var onprogress: (this: Window, ev: ProgressEvent) => any;
-declare var onratechange: (this: Window, ev: Event) => any;
-declare var onreadystatechange: (this: Window, ev: ProgressEvent) => any;
-declare var onreset: (this: Window, ev: Event) => any;
-declare var onresize: (this: Window, ev: UIEvent) => any;
-declare var onscroll: (this: Window, ev: UIEvent) => any;
-declare var onseeked: (this: Window, ev: Event) => any;
-declare var onseeking: (this: Window, ev: Event) => any;
-declare var onselect: (this: Window, ev: UIEvent) => any;
-declare var onstalled: (this: Window, ev: Event) => any;
-declare var onstorage: (this: Window, ev: StorageEvent) => any;
-declare var onsubmit: (this: Window, ev: Event) => any;
-declare var onsuspend: (this: Window, ev: Event) => any;
-declare var ontimeupdate: (this: Window, ev: Event) => any;
-declare var ontouchcancel: (ev: TouchEvent) => any;
-declare var ontouchend: (ev: TouchEvent) => any;
-declare var ontouchmove: (ev: TouchEvent) => any;
-declare var ontouchstart: (ev: TouchEvent) => any;
-declare var onunload: (this: Window, ev: Event) => any;
-declare var onvolumechange: (this: Window, ev: Event) => any;
-declare var onwaiting: (this: Window, ev: Event) => any;
-declare var opener: any;
-declare var orientation: string | number;
-declare var outerHeight: number;
-declare var outerWidth: number;
-declare var pageXOffset: number;
-declare var pageYOffset: number;
-declare var parent: Window;
-declare var performance: Performance;
-declare var personalbar: BarProp;
-declare var screen: Screen;
-declare var screenLeft: number;
-declare var screenTop: number;
-declare var screenX: number;
-declare var screenY: number;
-declare var scrollX: number;
-declare var scrollY: number;
-declare var scrollbars: BarProp;
-declare var self: Window;
-declare var status: string;
-declare var statusbar: BarProp;
-declare var styleMedia: StyleMedia;
-declare var toolbar: BarProp;
-declare var top: Window;
-declare var window: Window;
-declare function alert(message?: any): void;
-declare function blur(): void;
-declare function cancelAnimationFrame(handle: number): void;
-declare function captureEvents(): void;
-declare function close(): void;
-declare function confirm(message?: string): boolean;
-declare function focus(): void;
-declare function getComputedStyle(elt: Element, pseudoElt?: string): CSSStyleDeclaration;
-declare function getMatchedCSSRules(elt: Element, pseudoElt?: string): CSSRuleList;
-declare function getSelection(): Selection;
-declare function matchMedia(mediaQuery: string): MediaQueryList;
-declare function moveBy(x?: number, y?: number): void;
-declare function moveTo(x?: number, y?: number): void;
-declare function msWriteProfilerMark(profilerMarkName: string): void;
-declare function open(url?: string, target?: string, features?: string, replace?: boolean): Window;
-declare function postMessage(message: any, targetOrigin: string, transfer?: any[]): void;
-declare function print(): void;
-declare function prompt(message?: string, _default?: string): string | null;
-declare function releaseEvents(): void;
-declare function requestAnimationFrame(callback: FrameRequestCallback): number;
-declare function resizeBy(x?: number, y?: number): void;
-declare function resizeTo(x?: number, y?: number): void;
-declare function scroll(x?: number, y?: number): void;
-declare function scrollBy(x?: number, y?: number): void;
-declare function scrollTo(x?: number, y?: number): void;
-declare function webkitCancelAnimationFrame(handle: number): void;
-declare function webkitConvertPointFromNodeToPage(node: Node, pt: WebKitPoint): WebKitPoint;
-declare function webkitConvertPointFromPageToNode(node: Node, pt: WebKitPoint): WebKitPoint;
-declare function webkitRequestAnimationFrame(callback: FrameRequestCallback): number;
-declare function scroll(options?: ScrollToOptions): void;
-declare function scrollTo(options?: ScrollToOptions): void;
-declare function scrollBy(options?: ScrollToOptions): void;
-declare function toString(): string;
-declare function addEventListener(type: string, listener?: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-declare function dispatchEvent(evt: Event): boolean;
-declare function removeEventListener(type: string, listener?: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-declare function clearInterval(handle: number): void;
-declare function clearTimeout(handle: number): void;
-declare function setInterval(handler: (...args: any[]) => void, timeout: number): number;
-declare function setInterval(handler: any, timeout?: any, ...args: any[]): number;
-declare function setTimeout(handler: (...args: any[]) => void, timeout: number): number;
-declare function setTimeout(handler: any, timeout?: any, ...args: any[]): number;
-declare function clearImmediate(handle: number): void;
-declare function setImmediate(handler: (...args: any[]) => void): number;
-declare function setImmediate(handler: any, ...args: any[]): number;
-declare var sessionStorage: Storage;
-declare var localStorage: Storage;
-declare var console: Console;
-declare var onpointercancel: (this: Window, ev: PointerEvent) => any;
-declare var onpointerdown: (this: Window, ev: PointerEvent) => any;
-declare var onpointerenter: (this: Window, ev: PointerEvent) => any;
-declare var onpointerleave: (this: Window, ev: PointerEvent) => any;
-declare var onpointermove: (this: Window, ev: PointerEvent) => any;
-declare var onpointerout: (this: Window, ev: PointerEvent) => any;
-declare var onpointerover: (this: Window, ev: PointerEvent) => any;
-declare var onpointerup: (this: Window, ev: PointerEvent) => any;
-declare var onwheel: (this: Window, ev: WheelEvent) => any;
-declare var indexedDB: IDBFactory;
-declare function atob(encodedString: string): string;
-declare function btoa(rawString: string): string;
-declare function addEventListener(type: "MSGestureChange", listener: (this: Window, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "MSGestureDoubleTap", listener: (this: Window, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "MSGestureEnd", listener: (this: Window, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "MSGestureHold", listener: (this: Window, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "MSGestureStart", listener: (this: Window, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "MSGestureTap", listener: (this: Window, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "MSInertiaStart", listener: (this: Window, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "MSPointerCancel", listener: (this: Window, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "MSPointerDown", listener: (this: Window, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "MSPointerEnter", listener: (this: Window, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "MSPointerLeave", listener: (this: Window, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "MSPointerMove", listener: (this: Window, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "MSPointerOut", listener: (this: Window, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "MSPointerOver", listener: (this: Window, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "MSPointerUp", listener: (this: Window, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "abort", listener: (this: Window, ev: UIEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "afterprint", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "beforeprint", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "beforeunload", listener: (this: Window, ev: BeforeUnloadEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "blur", listener: (this: Window, ev: FocusEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "canplay", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "canplaythrough", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "change", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "click", listener: (this: Window, ev: MouseEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "compassneedscalibration", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "contextmenu", listener: (this: Window, ev: PointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "dblclick", listener: (this: Window, ev: MouseEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "devicelight", listener: (this: Window, ev: DeviceLightEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "devicemotion", listener: (this: Window, ev: DeviceMotionEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "deviceorientation", listener: (this: Window, ev: DeviceOrientationEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "drag", listener: (this: Window, ev: DragEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "dragend", listener: (this: Window, ev: DragEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "dragenter", listener: (this: Window, ev: DragEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "dragleave", listener: (this: Window, ev: DragEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "dragover", listener: (this: Window, ev: DragEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "dragstart", listener: (this: Window, ev: DragEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "drop", listener: (this: Window, ev: DragEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "durationchange", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "emptied", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "ended", listener: (this: Window, ev: MediaStreamErrorEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "focus", listener: (this: Window, ev: FocusEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "hashchange", listener: (this: Window, ev: HashChangeEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "input", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "invalid", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "keydown", listener: (this: Window, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "keypress", listener: (this: Window, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "keyup", listener: (this: Window, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "load", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "loadeddata", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "loadedmetadata", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "loadstart", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "message", listener: (this: Window, ev: MessageEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "mousedown", listener: (this: Window, ev: MouseEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "mouseenter", listener: (this: Window, ev: MouseEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "mouseleave", listener: (this: Window, ev: MouseEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "mousemove", listener: (this: Window, ev: MouseEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "mouseout", listener: (this: Window, ev: MouseEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "mouseover", listener: (this: Window, ev: MouseEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "mouseup", listener: (this: Window, ev: MouseEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "mousewheel", listener: (this: Window, ev: WheelEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "offline", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "online", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "orientationchange", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "pagehide", listener: (this: Window, ev: PageTransitionEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "pageshow", listener: (this: Window, ev: PageTransitionEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "pause", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "play", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "playing", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "pointercancel", listener: (this: Window, ev: PointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "pointerdown", listener: (this: Window, ev: PointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "pointerenter", listener: (this: Window, ev: PointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "pointerleave", listener: (this: Window, ev: PointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "pointermove", listener: (this: Window, ev: PointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "pointerout", listener: (this: Window, ev: PointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "pointerover", listener: (this: Window, ev: PointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "pointerup", listener: (this: Window, ev: PointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "popstate", listener: (this: Window, ev: PopStateEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "progress", listener: (this: Window, ev: ProgressEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "ratechange", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "readystatechange", listener: (this: Window, ev: ProgressEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "reset", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "resize", listener: (this: Window, ev: UIEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "scroll", listener: (this: Window, ev: UIEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "seeked", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "seeking", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "select", listener: (this: Window, ev: UIEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "stalled", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "storage", listener: (this: Window, ev: StorageEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "submit", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "suspend", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "timeupdate", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "unload", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "volumechange", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "waiting", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "wheel", listener: (this: Window, ev: WheelEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-type AAGUID = string;
-type AlgorithmIdentifier = string | Algorithm;
-type ConstrainBoolean = boolean | ConstrainBooleanParameters;
-type ConstrainDOMString = string | string[] | ConstrainDOMStringParameters;
-type ConstrainDouble = number | ConstrainDoubleRange;
-type ConstrainLong = number | ConstrainLongRange;
-type CryptoOperationData = ArrayBufferView;
-type GLbitfield = number;
-type GLboolean = boolean;
-type GLbyte = number;
-type GLclampf = number;
-type GLenum = number;
-type GLfloat = number;
-type GLint = number;
-type GLintptr = number;
-type GLshort = number;
-type GLsizei = number;
-type GLsizeiptr = number;
-type GLubyte = number;
-type GLuint = number;
-type GLushort = number;
-type IDBKeyPath = string;
-type KeyFormat = string;
-type KeyType = string;
-type KeyUsage = string;
-type MSInboundPayload = MSVideoRecvPayload | MSAudioRecvPayload;
-type MSLocalClientEvent = MSLocalClientEventBase | MSAudioLocalClientEvent;
-type MSOutboundPayload = MSVideoSendPayload | MSAudioSendPayload;
-type RTCIceGatherCandidate = RTCIceCandidate | RTCIceCandidateComplete;
-type RTCTransport = RTCDtlsTransport | RTCSrtpSdesTransport;
-type payloadtype = number;
-type ScrollBehavior = "auto" | "instant" | "smooth";
-type ScrollLogicalPosition = "start" | "center" | "end" | "nearest";
-type IDBValidKey = number | string | Date | IDBArrayKey;
-type BufferSource = ArrayBuffer | ArrayBufferView;
-type MouseWheelEvent = WheelEvent;
-type ScrollRestoration = "auto" | "manual";
-/////////////////////////////
-/// WorkerGlobalScope APIs 
-/////////////////////////////
-// These are only available in a Web Worker 
-declare function importScripts(...urls: string[]): void;
-
-
-/////////////////////////////
-/// Windows Script Host APIS
-/////////////////////////////
-
-
-interface ActiveXObject {
-    new (s: string): any;
-}
-declare var ActiveXObject: ActiveXObject;
-
-interface ITextWriter {
-    Write(s: string): void;
-    WriteLine(s: string): void;
-    Close(): void;
-}
-
-interface TextStreamBase {
-    /**
-     * The column number of the current character position in an input stream.
-     */
-    Column: number;
-
-    /**
-     * The current line number in an input stream.
-     */
-    Line: number;
-
-    /**
-     * Closes a text stream.
-     * It is not necessary to close standard streams; they close automatically when the process ends. If 
-     * you close a standard stream, be aware that any other pointers to that standard stream become invalid.
-     */
-    Close(): void;
-}
-
-interface TextStreamWriter extends TextStreamBase {
-    /**
-     * Sends a string to an output stream.
-     */
-    Write(s: string): void;
-
-    /**
-     * Sends a specified number of blank lines (newline characters) to an output stream.
-     */
-    WriteBlankLines(intLines: number): void;
-
-    /**
-     * Sends a string followed by a newline character to an output stream.
-     */
-    WriteLine(s: string): void;
-}
-
-interface TextStreamReader extends TextStreamBase {
-    /**
-     * Returns a specified number of characters from an input stream, starting at the current pointer position.
-     * Does not return until the ENTER key is pressed.
-     * Can only be used on a stream in reading mode; causes an error in writing or appending mode.
-     */
-    Read(characters: number): string;
-
-    /**
-     * Returns all characters from an input stream.
-     * Can only be used on a stream in reading mode; causes an error in writing or appending mode.
-     */
-    ReadAll(): string;
-
-    /**
-     * Returns an entire line from an input stream.
-     * Although this method extracts the newline character, it does not add it to the returned string.
-     * Can only be used on a stream in reading mode; causes an error in writing or appending mode.
-     */
-    ReadLine(): string;
-
-    /**
-     * Skips a specified number of characters when reading from an input text stream.
-     * Can only be used on a stream in reading mode; causes an error in writing or appending mode.
-     * @param characters Positive number of characters to skip forward. (Backward skipping is not supported.)
-     */
-    Skip(characters: number): void;
-
-    /**
-     * Skips the next line when reading from an input text stream.
-     * Can only be used on a stream in reading mode, not writing or appending mode.
-     */
-    SkipLine(): void;
-
-    /**
-     * Indicates whether the stream pointer position is at the end of a line.
-     */
-    AtEndOfLine: boolean;
-
-    /**
-     * Indicates whether the stream pointer position is at the end of a stream.
-     */
-    AtEndOfStream: boolean;
-}
-
-declare var WScript: {
-    /**
-    * Outputs text to either a message box (under WScript.exe) or the command console window followed by
-    * a newline (under CScript.exe).
-    */
-    Echo(s: any): void;
-
-    /**
-     * Exposes the write-only error output stream for the current script.
-     * Can be accessed only while using CScript.exe.
-     */
-    StdErr: TextStreamWriter;
-
-    /**
-     * Exposes the write-only output stream for the current script.
-     * Can be accessed only while using CScript.exe.
-     */
-    StdOut: TextStreamWriter;
-    Arguments: { length: number; Item(n: number): string; };
-
-    /**
-     *  The full path of the currently running script.
-     */
-    ScriptFullName: string;
-
-    /**
-     * Forces the script to stop immediately, with an optional exit code.
-     */
-    Quit(exitCode?: number): number;
-
-    /**
-     * The Windows Script Host build version number.
-     */
-    BuildVersion: number;
-
-    /**
-     * Fully qualified path of the host executable.
-     */
-    FullName: string;
-
-    /**
-     * Gets/sets the script mode - interactive(true) or batch(false).
-     */
-    Interactive: boolean;
-
-    /**
-     * The name of the host executable (WScript.exe or CScript.exe).
-     */
-    Name: string;
-
-    /**
-     * Path of the directory containing the host executable.
-     */
-    Path: string;
-
-    /**
-     * The filename of the currently running script.
-     */
-    ScriptName: string;
-
-    /**
-     * Exposes the read-only input stream for the current script.
-     * Can be accessed only while using CScript.exe.
-     */
-    StdIn: TextStreamReader;
-
-    /**
-     * Windows Script Host version
-     */
-    Version: string;
-
-    /**
-     * Connects a COM object's event sources to functions named with a given prefix, in the form prefix_event.
-     */
-    ConnectObject(objEventSource: any, strPrefix: string): void;
-
-    /**
-     * Creates a COM object.
-     * @param strProgiID
-     * @param strPrefix Function names in the form prefix_event will be bound to this object's COM events.
-     */
-    CreateObject(strProgID: string, strPrefix?: string): any;
-
-    /**
-     * Disconnects a COM object from its event sources.
-     */
-    DisconnectObject(obj: any): void;
-
-    /**
-     * Retrieves an existing object with the specified ProgID from memory, or creates a new one from a file.
-     * @param strPathname Fully qualified path to the file containing the object persisted to disk.
-     *                       For objects in memory, pass a zero-length string.
-     * @param strProgID
-     * @param strPrefix Function names in the form prefix_event will be bound to this object's COM events.
-     */
-    GetObject(strPathname: string, strProgID?: string, strPrefix?: string): any;
-
-    /**
-     * Suspends script execution for a specified length of time, then continues execution.
-     * @param intTime Interval (in milliseconds) to suspend script execution.
-     */
-    Sleep(intTime: number): void;
-};
-
-/**
- * Allows enumerating over a COM collection, which may not have indexed item access.
- */
-interface Enumerator<T> {
-    /**
-     * Returns true if the current item is the last one in the collection, or the collection is empty,
-     * or the current item is undefined.
-     */
-    atEnd(): boolean;
-
-    /**
-     * Returns the current item in the collection
-     */
-    item(): T;
-
-    /**
-     * Resets the current item in the collection to the first item. If there are no items in the collection,
-     * the current item is set to undefined.
-     */
-    moveFirst(): void;
-
-    /**
-     * Moves the current item to the next item in the collection. If the enumerator is at the end of
-     * the collection or the collection is empty, the current item is set to undefined.
-     */
-    moveNext(): void;
-}
-
-interface EnumeratorConstructor {
-    new <T>(collection: any): Enumerator<T>;
-    new (collection: any): Enumerator<any>;
-}
-
-declare var Enumerator: EnumeratorConstructor;
-
-/**
- * Enables reading from a COM safe array, which might have an alternate lower bound, or multiple dimensions.
- */
-interface VBArray<T> {
-    /**
-     * Returns the number of dimensions (1-based).
-     */
-    dimensions(): number;
-
-    /**
-     * Takes an index for each dimension in the array, and returns the item at the corresponding location.
-     */
-    getItem(dimension1Index: number, ...dimensionNIndexes: number[]): T;
-
-    /**
-     * Returns the smallest available index for a given dimension.
-     * @param dimension 1-based dimension (defaults to 1)
-     */
-    lbound(dimension?: number): number;
-
-    /**
-     * Returns the largest available index for a given dimension.
-     * @param dimension 1-based dimension (defaults to 1)
-     */
-    ubound(dimension?: number): number;
-
-    /**
-     * Returns a Javascript array with all the elements in the VBArray. If there are multiple dimensions,
-     * each successive dimension is appended to the end of the array.
-     * Example: [[1,2,3],[4,5,6]] becomes [1,2,3,4,5,6]
-     */
-    toArray(): T[];
-}
-
-interface VBArrayConstructor {
-    new <T>(safeArray: any): VBArray<T>;
-    new (safeArray: any): VBArray<any>;
-}
-
-declare var VBArray: VBArrayConstructor;
-
-/**
- * Automation date (VT_DATE)
- */
-interface VarDate { }
-
-interface DateConstructor {
-    new (vd: VarDate): Date;
-}
-
-interface Date {
-    getVarDate: () => VarDate;
-}
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved. 
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0  
+ 
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
+MERCHANTABLITY OR NON-INFRINGEMENT. 
+ 
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+
+
+
+/// <reference no-default-lib="true"/>
+
+
+/////////////////////////////
+/// ECMAScript APIs
+/////////////////////////////
+
+declare const NaN: number;
+declare const Infinity: number;
+
+/**
+  * Evaluates JavaScript code and executes it.
+  * @param x A String value that contains valid JavaScript code.
+  */
+declare function eval(x: string): any;
+
+/**
+  * Converts A string to an integer.
+  * @param s A string to convert into a number.
+  * @param radix A value between 2 and 36 that specifies the base of the number in numString.
+  * If this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.
+  * All other strings are considered decimal.
+  */
+declare function parseInt(s: string, radix?: number): number;
+
+/**
+  * Converts a string to a floating-point number.
+  * @param string A string that contains a floating-point number.
+  */
+declare function parseFloat(string: string): number;
+
+/**
+  * Returns a Boolean value that indicates whether a value is the reserved value NaN (not a number).
+  * @param number A numeric value.
+  */
+declare function isNaN(number: number): boolean;
+
+/**
+  * Determines whether a supplied number is finite.
+  * @param number Any numeric value.
+  */
+declare function isFinite(number: number): boolean;
+
+/**
+  * Gets the unencoded version of an encoded Uniform Resource Identifier (URI).
+  * @param encodedURI A value representing an encoded URI.
+  */
+declare function decodeURI(encodedURI: string): string;
+
+/**
+  * Gets the unencoded version of an encoded component of a Uniform Resource Identifier (URI).
+  * @param encodedURIComponent A value representing an encoded URI component.
+  */
+declare function decodeURIComponent(encodedURIComponent: string): string;
+
+/**
+  * Encodes a text string as a valid Uniform Resource Identifier (URI)
+  * @param uri A value representing an encoded URI.
+  */
+declare function encodeURI(uri: string): string;
+
+/**
+  * Encodes a text string as a valid component of a Uniform Resource Identifier (URI).
+  * @param uriComponent A value representing an encoded URI component.
+  */
+declare function encodeURIComponent(uriComponent: string): string;
+
+interface PropertyDescriptor {
+    configurable?: boolean;
+    enumerable?: boolean;
+    value?: any;
+    writable?: boolean;
+    get?(): any;
+    set?(v: any): void;
+}
+
+interface PropertyDescriptorMap {
+    [s: string]: PropertyDescriptor;
+}
+
+interface Object {
+    /** The initial value of Object.prototype.constructor is the standard built-in Object constructor. */
+    constructor: Function;
+
+    /** Returns a string representation of an object. */
+    toString(): string;
+
+    /** Returns a date converted to a string using the current locale. */
+    toLocaleString(): string;
+
+    /** Returns the primitive value of the specified object. */
+    valueOf(): Object;
+
+    /**
+      * Determines whether an object has a property with the specified name.
+      * @param v A property name.
+      */
+    hasOwnProperty(v: string): boolean;
+
+    /**
+      * Determines whether an object exists in another object's prototype chain.
+      * @param v Another object whose prototype chain is to be checked.
+      */
+    isPrototypeOf(v: Object): boolean;
+
+    /**
+      * Determines whether a specified property is enumerable.
+      * @param v A property name.
+      */
+    propertyIsEnumerable(v: string): boolean;
+}
+
+interface ObjectConstructor {
+    new(value?: any): Object;
+    (): any;
+    (value: any): any;
+
+    /** A reference to the prototype for a class of objects. */
+    readonly prototype: Object;
+
+    /**
+      * Returns the prototype of an object.
+      * @param o The object that references the prototype.
+      */
+    getPrototypeOf(o: any): any;
+
+    /**
+      * Gets the own property descriptor of the specified object.
+      * An own property descriptor is one that is defined directly on the object and is not inherited from the object's prototype.
+      * @param o Object that contains the property.
+      * @param p Name of the property.
+    */
+    getOwnPropertyDescriptor(o: any, p: string): PropertyDescriptor;
+
+    /**
+      * Returns the names of the own properties of an object. The own properties of an object are those that are defined directly
+      * on that object, and are not inherited from the object's prototype. The properties of an object include both fields (objects) and functions.
+      * @param o Object that contains the own properties.
+      */
+    getOwnPropertyNames(o: any): string[];
+
+    /**
+      * Creates an object that has the specified prototype or that has null prototype.
+      * @param o Object to use as a prototype. May be null.
+      */
+    create(o: object | null): any;
+
+    /**
+      * Creates an object that has the specified prototype, and that optionally contains specified properties.
+      * @param o Object to use as a prototype. May be null
+      * @param properties JavaScript object that contains one or more property descriptors.
+      */
+    create(o: object | null, properties: PropertyDescriptorMap & ThisType<any>): any;
+
+    /**
+      * Adds a property to an object, or modifies attributes of an existing property.
+      * @param o Object on which to add or modify the property. This can be a native JavaScript object (that is, a user-defined object or a built in object) or a DOM object.
+      * @param p The property name.
+      * @param attributes Descriptor for the property. It can be for a data property or an accessor property.
+      */
+    defineProperty(o: any, p: string, attributes: PropertyDescriptor & ThisType<any>): any;
+
+    /**
+      * Adds one or more properties to an object, and/or modifies attributes of existing properties.
+      * @param o Object on which to add or modify the properties. This can be a native JavaScript object or a DOM object.
+      * @param properties JavaScript object that contains one or more descriptor objects. Each descriptor object describes a data property or an accessor property.
+      */
+    defineProperties(o: any, properties: PropertyDescriptorMap & ThisType<any>): any;
+
+    /**
+      * Prevents the modification of attributes of existing properties, and prevents the addition of new properties.
+      * @param o Object on which to lock the attributes.
+      */
+    seal<T>(o: T): T;
+
+    /**
+      * Prevents the modification of existing property attributes and values, and prevents the addition of new properties.
+      * @param o Object on which to lock the attributes.
+      */
+    freeze<T>(a: T[]): ReadonlyArray<T>;
+
+    /**
+      * Prevents the modification of existing property attributes and values, and prevents the addition of new properties.
+      * @param o Object on which to lock the attributes.
+      */
+    freeze<T extends Function>(f: T): T;
+
+    /**
+      * Prevents the modification of existing property attributes and values, and prevents the addition of new properties.
+      * @param o Object on which to lock the attributes.
+      */
+    freeze<T>(o: T): Readonly<T>;
+
+    /**
+      * Prevents the addition of new properties to an object.
+      * @param o Object to make non-extensible.
+      */
+    preventExtensions<T>(o: T): T;
+
+    /**
+      * Returns true if existing property attributes cannot be modified in an object and new properties cannot be added to the object.
+      * @param o Object to test.
+      */
+    isSealed(o: any): boolean;
+
+    /**
+      * Returns true if existing property attributes and values cannot be modified in an object, and new properties cannot be added to the object.
+      * @param o Object to test.
+      */
+    isFrozen(o: any): boolean;
+
+    /**
+      * Returns a value that indicates whether new properties can be added to an object.
+      * @param o Object to test.
+      */
+    isExtensible(o: any): boolean;
+
+    /**
+      * Returns the names of the enumerable properties and methods of an object.
+      * @param o Object that contains the properties and methods. This can be an object that you created or an existing Document Object Model (DOM) object.
+      */
+    keys(o: any): string[];
+}
+
+/**
+  * Provides functionality common to all JavaScript objects.
+  */
+declare const Object: ObjectConstructor;
+
+/**
+  * Creates a new function.
+  */
+interface Function {
+    /**
+      * Calls the function, substituting the specified object for the this value of the function, and the specified array for the arguments of the function.
+      * @param thisArg The object to be used as the this object.
+      * @param argArray A set of arguments to be passed to the function.
+      */
+    apply(this: Function, thisArg: any, argArray?: any): any;
+
+    /**
+      * Calls a method of an object, substituting another object for the current object.
+      * @param thisArg The object to be used as the current object.
+      * @param argArray A list of arguments to be passed to the method.
+      */
+    call(this: Function, thisArg: any, ...argArray: any[]): any;
+
+    /**
+      * For a given function, creates a bound function that has the same body as the original function.
+      * The this object of the bound function is associated with the specified object, and has the specified initial parameters.
+      * @param thisArg An object to which the this keyword can refer inside the new function.
+      * @param argArray A list of arguments to be passed to the new function.
+      */
+    bind(this: Function, thisArg: any, ...argArray: any[]): any;
+
+    /** Returns a string representation of a function. */
+    toString(): string;
+
+    prototype: any;
+    readonly length: number;
+
+    // Non-standard extensions
+    arguments: any;
+    caller: Function;
+}
+
+interface FunctionConstructor {
+    /**
+      * Creates a new function.
+      * @param args A list of arguments the function accepts.
+      */
+    new(...args: string[]): Function;
+    (...args: string[]): Function;
+    readonly prototype: Function;
+}
+
+declare const Function: FunctionConstructor;
+
+interface IArguments {
+    [index: number]: any;
+    length: number;
+    callee: Function;
+}
+
+interface String {
+    /** Returns a string representation of a string. */
+    toString(): string;
+
+    /**
+      * Returns the character at the specified index.
+      * @param pos The zero-based index of the desired character.
+      */
+    charAt(pos: number): string;
+
+    /**
+      * Returns the Unicode value of the character at the specified location.
+      * @param index The zero-based index of the desired character. If there is no character at the specified index, NaN is returned.
+      */
+    charCodeAt(index: number): number;
+
+    /**
+      * Returns a string that contains the concatenation of two or more strings.
+      * @param strings The strings to append to the end of the string.
+      */
+    concat(...strings: string[]): string;
+
+    /**
+      * Returns the position of the first occurrence of a substring.
+      * @param searchString The substring to search for in the string
+      * @param position The index at which to begin searching the String object. If omitted, search starts at the beginning of the string.
+      */
+    indexOf(searchString: string, position?: number): number;
+
+    /**
+      * Returns the last occurrence of a substring in the string.
+      * @param searchString The substring to search for.
+      * @param position The index at which to begin searching. If omitted, the search begins at the end of the string.
+      */
+    lastIndexOf(searchString: string, position?: number): number;
+
+    /**
+      * Determines whether two strings are equivalent in the current locale.
+      * @param that String to compare to target string
+      */
+    localeCompare(that: string): number;
+
+    /**
+      * Matches a string with a regular expression, and returns an array containing the results of that search.
+      * @param regexp A variable name or string literal containing the regular expression pattern and flags.
+      */
+    match(regexp: string | RegExp): RegExpMatchArray | null;
+
+    /**
+      * Replaces text in a string, using a regular expression or search string.
+      * @param searchValue A string to search for.
+      * @param replaceValue A string containing the text to replace for every successful match of searchValue in this string.
+      */
+    replace(searchValue: string | RegExp, replaceValue: string): string;
+
+    /**
+      * Replaces text in a string, using a regular expression or search string.
+      * @param searchValue A string to search for.
+      * @param replacer A function that returns the replacement text.
+      */
+    replace(searchValue: string | RegExp, replacer: (substring: string, ...args: any[]) => string): string;
+
+    /**
+      * Finds the first substring match in a regular expression search.
+      * @param regexp The regular expression pattern and applicable flags.
+      */
+    search(regexp: string | RegExp): number;
+
+    /**
+      * Returns a section of a string.
+      * @param start The index to the beginning of the specified portion of stringObj.
+      * @param end The index to the end of the specified portion of stringObj. The substring includes the characters up to, but not including, the character indicated by end.
+      * If this value is not specified, the substring continues to the end of stringObj.
+      */
+    slice(start?: number, end?: number): string;
+
+    /**
+      * Split a string into substrings using the specified separator and return them as an array.
+      * @param separator A string that identifies character or characters to use in separating the string. If omitted, a single-element array containing the entire string is returned.
+      * @param limit A value used to limit the number of elements returned in the array.
+      */
+    split(separator: string | RegExp, limit?: number): string[];
+
+    /**
+      * Returns the substring at the specified location within a String object.
+      * @param start The zero-based index number indicating the beginning of the substring.
+      * @param end Zero-based index number indicating the end of the substring. The substring includes the characters up to, but not including, the character indicated by end.
+      * If end is omitted, the characters from start through the end of the original string are returned.
+      */
+    substring(start: number, end?: number): string;
+
+    /** Converts all the alphabetic characters in a string to lowercase. */
+    toLowerCase(): string;
+
+    /** Converts all alphabetic characters to lowercase, taking into account the host environment's current locale. */
+    toLocaleLowerCase(): string;
+
+    /** Converts all the alphabetic characters in a string to uppercase. */
+    toUpperCase(): string;
+
+    /** Returns a string where all alphabetic characters have been converted to uppercase, taking into account the host environment's current locale. */
+    toLocaleUpperCase(): string;
+
+    /** Removes the leading and trailing white space and line terminator characters from a string. */
+    trim(): string;
+
+    /** Returns the length of a String object. */
+    readonly length: number;
+
+    // IE extensions
+    /**
+      * Gets a substring beginning at the specified location and having the specified length.
+      * @param from The starting position of the desired substring. The index of the first character in the string is zero.
+      * @param length The number of characters to include in the returned substring.
+      */
+    substr(from: number, length?: number): string;
+
+    /** Returns the primitive value of the specified object. */
+    valueOf(): string;
+
+    readonly [index: number]: string;
+}
+
+interface StringConstructor {
+    new(value?: any): String;
+    (value?: any): string;
+    readonly prototype: String;
+    fromCharCode(...codes: number[]): string;
+}
+
+/**
+  * Allows manipulation and formatting of text strings and determination and location of substrings within strings.
+  */
+declare const String: StringConstructor;
+
+interface Boolean {
+    /** Returns the primitive value of the specified object. */
+    valueOf(): boolean;
+}
+
+interface BooleanConstructor {
+    new(value?: any): Boolean;
+    (value?: any): boolean;
+    readonly prototype: Boolean;
+}
+
+declare const Boolean: BooleanConstructor;
+
+interface Number {
+    /**
+      * Returns a string representation of an object.
+      * @param radix Specifies a radix for converting numeric values to strings. This value is only used for numbers.
+      */
+    toString(radix?: number): string;
+
+    /**
+      * Returns a string representing a number in fixed-point notation.
+      * @param fractionDigits Number of digits after the decimal point. Must be in the range 0 - 20, inclusive.
+      */
+    toFixed(fractionDigits?: number): string;
+
+    /**
+      * Returns a string containing a number represented in exponential notation.
+      * @param fractionDigits Number of digits after the decimal point. Must be in the range 0 - 20, inclusive.
+      */
+    toExponential(fractionDigits?: number): string;
+
+    /**
+      * Returns a string containing a number represented either in exponential or fixed-point notation with a specified number of digits.
+      * @param precision Number of significant digits. Must be in the range 1 - 21, inclusive.
+      */
+    toPrecision(precision?: number): string;
+
+    /** Returns the primitive value of the specified object. */
+    valueOf(): number;
+}
+
+interface NumberConstructor {
+    new(value?: any): Number;
+    (value?: any): number;
+    readonly prototype: Number;
+
+    /** The largest number that can be represented in JavaScript. Equal to approximately 1.79E+308. */
+    readonly MAX_VALUE: number;
+
+    /** The closest number to zero that can be represented in JavaScript. Equal to approximately 5.00E-324. */
+    readonly MIN_VALUE: number;
+
+    /**
+      * A value that is not a number.
+      * In equality comparisons, NaN does not equal any value, including itself. To test whether a value is equivalent to NaN, use the isNaN function.
+      */
+    readonly NaN: number;
+
+    /**
+      * A value that is less than the largest negative number that can be represented in JavaScript.
+      * JavaScript displays NEGATIVE_INFINITY values as -infinity.
+      */
+    readonly NEGATIVE_INFINITY: number;
+
+    /**
+      * A value greater than the largest number that can be represented in JavaScript.
+      * JavaScript displays POSITIVE_INFINITY values as infinity.
+      */
+    readonly POSITIVE_INFINITY: number;
+}
+
+/** An object that represents a number of any kind. All JavaScript numbers are 64-bit floating-point numbers. */
+declare const Number: NumberConstructor;
+
+interface TemplateStringsArray extends ReadonlyArray<string> {
+    readonly raw: ReadonlyArray<string>;
+}
+
+interface Math {
+    /** The mathematical constant e. This is Euler's number, the base of natural logarithms. */
+    readonly E: number;
+    /** The natural logarithm of 10. */
+    readonly LN10: number;
+    /** The natural logarithm of 2. */
+    readonly LN2: number;
+    /** The base-2 logarithm of e. */
+    readonly LOG2E: number;
+    /** The base-10 logarithm of e. */
+    readonly LOG10E: number;
+    /** Pi. This is the ratio of the circumference of a circle to its diameter. */
+    readonly PI: number;
+    /** The square root of 0.5, or, equivalently, one divided by the square root of 2. */
+    readonly SQRT1_2: number;
+    /** The square root of 2. */
+    readonly SQRT2: number;
+    /**
+      * Returns the absolute value of a number (the value without regard to whether it is positive or negative).
+      * For example, the absolute value of -5 is the same as the absolute value of 5.
+      * @param x A numeric expression for which the absolute value is needed.
+      */
+    abs(x: number): number;
+    /**
+      * Returns the arc cosine (or inverse cosine) of a number.
+      * @param x A numeric expression.
+      */
+    acos(x: number): number;
+    /**
+      * Returns the arcsine of a number.
+      * @param x A numeric expression.
+      */
+    asin(x: number): number;
+    /**
+      * Returns the arctangent of a number.
+      * @param x A numeric expression for which the arctangent is needed.
+      */
+    atan(x: number): number;
+    /**
+      * Returns the angle (in radians) from the X axis to a point.
+      * @param y A numeric expression representing the cartesian y-coordinate.
+      * @param x A numeric expression representing the cartesian x-coordinate.
+      */
+    atan2(y: number, x: number): number;
+    /**
+      * Returns the smallest number greater than or equal to its numeric argument.
+      * @param x A numeric expression.
+      */
+    ceil(x: number): number;
+    /**
+      * Returns the cosine of a number.
+      * @param x A numeric expression that contains an angle measured in radians.
+      */
+    cos(x: number): number;
+    /**
+      * Returns e (the base of natural logarithms) raised to a power.
+      * @param x A numeric expression representing the power of e.
+      */
+    exp(x: number): number;
+    /**
+      * Returns the greatest number less than or equal to its numeric argument.
+      * @param x A numeric expression.
+      */
+    floor(x: number): number;
+    /**
+      * Returns the natural logarithm (base e) of a number.
+      * @param x A numeric expression.
+      */
+    log(x: number): number;
+    /**
+      * Returns the larger of a set of supplied numeric expressions.
+      * @param values Numeric expressions to be evaluated.
+      */
+    max(...values: number[]): number;
+    /**
+      * Returns the smaller of a set of supplied numeric expressions.
+      * @param values Numeric expressions to be evaluated.
+      */
+    min(...values: number[]): number;
+    /**
+      * Returns the value of a base expression taken to a specified power.
+      * @param x The base value of the expression.
+      * @param y The exponent value of the expression.
+      */
+    pow(x: number, y: number): number;
+    /** Returns a pseudorandom number between 0 and 1. */
+    random(): number;
+    /**
+      * Returns a supplied numeric expression rounded to the nearest number.
+      * @param x The value to be rounded to the nearest number.
+      */
+    round(x: number): number;
+    /**
+      * Returns the sine of a number.
+      * @param x A numeric expression that contains an angle measured in radians.
+      */
+    sin(x: number): number;
+    /**
+      * Returns the square root of a number.
+      * @param x A numeric expression.
+      */
+    sqrt(x: number): number;
+    /**
+      * Returns the tangent of a number.
+      * @param x A numeric expression that contains an angle measured in radians.
+      */
+    tan(x: number): number;
+}
+/** An intrinsic object that provides basic mathematics functionality and constants. */
+declare const Math: Math;
+
+/** Enables basic storage and retrieval of dates and times. */
+interface Date {
+    /** Returns a string representation of a date. The format of the string depends on the locale. */
+    toString(): string;
+    /** Returns a date as a string value. */
+    toDateString(): string;
+    /** Returns a time as a string value. */
+    toTimeString(): string;
+    /** Returns a value as a string value appropriate to the host environment's current locale. */
+    toLocaleString(): string;
+    /** Returns a date as a string value appropriate to the host environment's current locale. */
+    toLocaleDateString(): string;
+    /** Returns a time as a string value appropriate to the host environment's current locale. */
+    toLocaleTimeString(): string;
+    /** Returns the stored time value in milliseconds since midnight, January 1, 1970 UTC. */
+    valueOf(): number;
+    /** Gets the time value in milliseconds. */
+    getTime(): number;
+    /** Gets the year, using local time. */
+    getFullYear(): number;
+    /** Gets the year using Universal Coordinated Time (UTC). */
+    getUTCFullYear(): number;
+    /** Gets the month, using local time. */
+    getMonth(): number;
+    /** Gets the month of a Date object using Universal Coordinated Time (UTC). */
+    getUTCMonth(): number;
+    /** Gets the day-of-the-month, using local time. */
+    getDate(): number;
+    /** Gets the day-of-the-month, using Universal Coordinated Time (UTC). */
+    getUTCDate(): number;
+    /** Gets the day of the week, using local time. */
+    getDay(): number;
+    /** Gets the day of the week using Universal Coordinated Time (UTC). */
+    getUTCDay(): number;
+    /** Gets the hours in a date, using local time. */
+    getHours(): number;
+    /** Gets the hours value in a Date object using Universal Coordinated Time (UTC). */
+    getUTCHours(): number;
+    /** Gets the minutes of a Date object, using local time. */
+    getMinutes(): number;
+    /** Gets the minutes of a Date object using Universal Coordinated Time (UTC). */
+    getUTCMinutes(): number;
+    /** Gets the seconds of a Date object, using local time. */
+    getSeconds(): number;
+    /** Gets the seconds of a Date object using Universal Coordinated Time (UTC). */
+    getUTCSeconds(): number;
+    /** Gets the milliseconds of a Date, using local time. */
+    getMilliseconds(): number;
+    /** Gets the milliseconds of a Date object using Universal Coordinated Time (UTC). */
+    getUTCMilliseconds(): number;
+    /** Gets the difference in minutes between the time on the local computer and Universal Coordinated Time (UTC). */
+    getTimezoneOffset(): number;
+    /**
+      * Sets the date and time value in the Date object.
+      * @param time A numeric value representing the number of elapsed milliseconds since midnight, January 1, 1970 GMT.
+      */
+    setTime(time: number): number;
+    /**
+      * Sets the milliseconds value in the Date object using local time.
+      * @param ms A numeric value equal to the millisecond value.
+      */
+    setMilliseconds(ms: number): number;
+    /**
+      * Sets the milliseconds value in the Date object using Universal Coordinated Time (UTC).
+      * @param ms A numeric value equal to the millisecond value.
+      */
+    setUTCMilliseconds(ms: number): number;
+
+    /**
+      * Sets the seconds value in the Date object using local time.
+      * @param sec A numeric value equal to the seconds value.
+      * @param ms A numeric value equal to the milliseconds value.
+      */
+    setSeconds(sec: number, ms?: number): number;
+    /**
+      * Sets the seconds value in the Date object using Universal Coordinated Time (UTC).
+      * @param sec A numeric value equal to the seconds value.
+      * @param ms A numeric value equal to the milliseconds value.
+      */
+    setUTCSeconds(sec: number, ms?: number): number;
+    /**
+      * Sets the minutes value in the Date object using local time.
+      * @param min A numeric value equal to the minutes value.
+      * @param sec A numeric value equal to the seconds value.
+      * @param ms A numeric value equal to the milliseconds value.
+      */
+    setMinutes(min: number, sec?: number, ms?: number): number;
+    /**
+      * Sets the minutes value in the Date object using Universal Coordinated Time (UTC).
+      * @param min A numeric value equal to the minutes value.
+      * @param sec A numeric value equal to the seconds value.
+      * @param ms A numeric value equal to the milliseconds value.
+      */
+    setUTCMinutes(min: number, sec?: number, ms?: number): number;
+    /**
+      * Sets the hour value in the Date object using local time.
+      * @param hours A numeric value equal to the hours value.
+      * @param min A numeric value equal to the minutes value.
+      * @param sec A numeric value equal to the seconds value.
+      * @param ms A numeric value equal to the milliseconds value.
+      */
+    setHours(hours: number, min?: number, sec?: number, ms?: number): number;
+    /**
+      * Sets the hours value in the Date object using Universal Coordinated Time (UTC).
+      * @param hours A numeric value equal to the hours value.
+      * @param min A numeric value equal to the minutes value.
+      * @param sec A numeric value equal to the seconds value.
+      * @param ms A numeric value equal to the milliseconds value.
+      */
+    setUTCHours(hours: number, min?: number, sec?: number, ms?: number): number;
+    /**
+      * Sets the numeric day-of-the-month value of the Date object using local time.
+      * @param date A numeric value equal to the day of the month.
+      */
+    setDate(date: number): number;
+    /**
+      * Sets the numeric day of the month in the Date object using Universal Coordinated Time (UTC).
+      * @param date A numeric value equal to the day of the month.
+      */
+    setUTCDate(date: number): number;
+    /**
+      * Sets the month value in the Date object using local time.
+      * @param month A numeric value equal to the month. The value for January is 0, and other month values follow consecutively.
+      * @param date A numeric value representing the day of the month. If this value is not supplied, the value from a call to the getDate method is used.
+      */
+    setMonth(month: number, date?: number): number;
+    /**
+      * Sets the month value in the Date object using Universal Coordinated Time (UTC).
+      * @param month A numeric value equal to the month. The value for January is 0, and other month values follow consecutively.
+      * @param date A numeric value representing the day of the month. If it is not supplied, the value from a call to the getUTCDate method is used.
+      */
+    setUTCMonth(month: number, date?: number): number;
+    /**
+      * Sets the year of the Date object using local time.
+      * @param year A numeric value for the year.
+      * @param month A zero-based numeric value for the month (0 for January, 11 for December). Must be specified if numDate is specified.
+      * @param date A numeric value equal for the day of the month.
+      */
+    setFullYear(year: number, month?: number, date?: number): number;
+    /**
+      * Sets the year value in the Date object using Universal Coordinated Time (UTC).
+      * @param year A numeric value equal to the year.
+      * @param month A numeric value equal to the month. The value for January is 0, and other month values follow consecutively. Must be supplied if numDate is supplied.
+      * @param date A numeric value equal to the day of the month.
+      */
+    setUTCFullYear(year: number, month?: number, date?: number): number;
+    /** Returns a date converted to a string using Universal Coordinated Time (UTC). */
+    toUTCString(): string;
+    /** Returns a date as a string value in ISO format. */
+    toISOString(): string;
+    /** Used by the JSON.stringify method to enable the transformation of an object's data for JavaScript Object Notation (JSON) serialization. */
+    toJSON(key?: any): string;
+}
+
+interface DateConstructor {
+    new(): Date;
+    new(value: number): Date;
+    new(value: string): Date;
+    new(year: number, month: number, date?: number, hours?: number, minutes?: number, seconds?: number, ms?: number): Date;
+    (): string;
+    readonly prototype: Date;
+    /**
+      * Parses a string containing a date, and returns the number of milliseconds between that date and midnight, January 1, 1970.
+      * @param s A date string
+      */
+    parse(s: string): number;
+    /**
+      * Returns the number of milliseconds between midnight, January 1, 1970 Universal Coordinated Time (UTC) (or GMT) and the specified date.
+      * @param year The full year designation is required for cross-century date accuracy. If year is between 0 and 99 is used, then year is assumed to be 1900 + year.
+      * @param month The month as an number between 0 and 11 (January to December).
+      * @param date The date as an number between 1 and 31.
+      * @param hours Must be supplied if minutes is supplied. An number from 0 to 23 (midnight to 11pm) that specifies the hour.
+      * @param minutes Must be supplied if seconds is supplied. An number from 0 to 59 that specifies the minutes.
+      * @param seconds Must be supplied if milliseconds is supplied. An number from 0 to 59 that specifies the seconds.
+      * @param ms An number from 0 to 999 that specifies the milliseconds.
+      */
+    UTC(year: number, month: number, date?: number, hours?: number, minutes?: number, seconds?: number, ms?: number): number;
+    now(): number;
+}
+
+declare const Date: DateConstructor;
+
+interface RegExpMatchArray extends Array<string> {
+    index?: number;
+    input?: string;
+}
+
+interface RegExpExecArray extends Array<string> {
+    index: number;
+    input: string;
+}
+
+interface RegExp {
+    /**
+      * Executes a search on a string using a regular expression pattern, and returns an array containing the results of that search.
+      * @param string The String object or string literal on which to perform the search.
+      */
+    exec(string: string): RegExpExecArray | null;
+
+    /**
+      * Returns a Boolean value that indicates whether or not a pattern exists in a searched string.
+      * @param string String on which to perform the search.
+      */
+    test(string: string): boolean;
+
+    /** Returns a copy of the text of the regular expression pattern. Read-only. The regExp argument is a Regular expression object. It can be a variable name or a literal. */
+    readonly source: string;
+
+    /** Returns a Boolean value indicating the state of the global flag (g) used with a regular expression. Default is false. Read-only. */
+    readonly global: boolean;
+
+    /** Returns a Boolean value indicating the state of the ignoreCase flag (i) used with a regular expression. Default is false. Read-only. */
+    readonly ignoreCase: boolean;
+
+    /** Returns a Boolean value indicating the state of the multiline flag (m) used with a regular expression. Default is false. Read-only. */
+    readonly multiline: boolean;
+
+    lastIndex: number;
+
+    // Non-standard extensions
+    compile(): this;
+}
+
+interface RegExpConstructor {
+    new(pattern: RegExp | string): RegExp;
+    new(pattern: string, flags?: string): RegExp;
+    (pattern: RegExp | string): RegExp;
+    (pattern: string, flags?: string): RegExp;
+    readonly prototype: RegExp;
+
+    // Non-standard extensions
+    $1: string;
+    $2: string;
+    $3: string;
+    $4: string;
+    $5: string;
+    $6: string;
+    $7: string;
+    $8: string;
+    $9: string;
+    lastMatch: string;
+}
+
+declare const RegExp: RegExpConstructor;
+
+interface Error {
+    name: string;
+    message: string;
+    stack?: string;
+}
+
+interface ErrorConstructor {
+    new(message?: string): Error;
+    (message?: string): Error;
+    readonly prototype: Error;
+}
+
+declare const Error: ErrorConstructor;
+
+interface EvalError extends Error {
+}
+
+interface EvalErrorConstructor {
+    new(message?: string): EvalError;
+    (message?: string): EvalError;
+    readonly prototype: EvalError;
+}
+
+declare const EvalError: EvalErrorConstructor;
+
+interface RangeError extends Error {
+}
+
+interface RangeErrorConstructor {
+    new(message?: string): RangeError;
+    (message?: string): RangeError;
+    readonly prototype: RangeError;
+}
+
+declare const RangeError: RangeErrorConstructor;
+
+interface ReferenceError extends Error {
+}
+
+interface ReferenceErrorConstructor {
+    new(message?: string): ReferenceError;
+    (message?: string): ReferenceError;
+    readonly prototype: ReferenceError;
+}
+
+declare const ReferenceError: ReferenceErrorConstructor;
+
+interface SyntaxError extends Error {
+}
+
+interface SyntaxErrorConstructor {
+    new(message?: string): SyntaxError;
+    (message?: string): SyntaxError;
+    readonly prototype: SyntaxError;
+}
+
+declare const SyntaxError: SyntaxErrorConstructor;
+
+interface TypeError extends Error {
+}
+
+interface TypeErrorConstructor {
+    new(message?: string): TypeError;
+    (message?: string): TypeError;
+    readonly prototype: TypeError;
+}
+
+declare const TypeError: TypeErrorConstructor;
+
+interface URIError extends Error {
+}
+
+interface URIErrorConstructor {
+    new(message?: string): URIError;
+    (message?: string): URIError;
+    readonly prototype: URIError;
+}
+
+declare const URIError: URIErrorConstructor;
+
+interface JSON {
+    /**
+      * Converts a JavaScript Object Notation (JSON) string into an object.
+      * @param text A valid JSON string.
+      * @param reviver A function that transforms the results. This function is called for each member of the object.
+      * If a member contains nested objects, the nested objects are transformed before the parent object is.
+      */
+    parse(text: string, reviver?: (key: any, value: any) => any): any;
+    /**
+      * Converts a JavaScript value to a JavaScript Object Notation (JSON) string.
+      * @param value A JavaScript value, usually an object or array, to be converted.
+      * @param replacer A function that transforms the results.
+      * @param space Adds indentation, white space, and line break characters to the return-value JSON text to make it easier to read.
+      */
+    stringify(value: any, replacer?: (key: string, value: any) => any, space?: string | number): string;
+    /**
+      * Converts a JavaScript value to a JavaScript Object Notation (JSON) string.
+      * @param value A JavaScript value, usually an object or array, to be converted.
+      * @param replacer An array of strings and numbers that acts as a approved list for selecting the object properties that will be stringified.
+      * @param space Adds indentation, white space, and line break characters to the return-value JSON text to make it easier to read.
+      */
+    stringify(value: any, replacer?: (number | string)[] | null, space?: string | number): string;
+}
+
+/**
+  * An intrinsic object that provides functions to convert JavaScript values to and from the JavaScript Object Notation (JSON) format.
+  */
+declare const JSON: JSON;
+
+
+/////////////////////////////
+/// ECMAScript Array API (specially handled by compiler)
+/////////////////////////////
+
+interface ReadonlyArray<T> {
+    /**
+      * Gets the length of the array. This is a number one higher than the highest element defined in an array.
+      */
+    readonly length: number;
+    /**
+      * Returns a string representation of an array.
+      */
+    toString(): string;
+    /**
+      * Returns a string representation of an array. The elements are converted to string using thier toLocalString methods.
+      */
+    toLocaleString(): string;
+    /**
+      * Combines two or more arrays.
+      * @param items Additional items to add to the end of array1.
+      */
+    concat(...items: T[][]): T[];
+    /**
+      * Combines two or more arrays.
+      * @param items Additional items to add to the end of array1.
+      */
+    concat(...items: (T | T[])[]): T[];
+    /**
+      * Adds all the elements of an array separated by the specified separator string.
+      * @param separator A string used to separate one element of an array from the next in the resulting String. If omitted, the array elements are separated with a comma.
+      */
+    join(separator?: string): string;
+    /**
+      * Returns a section of an array.
+      * @param start The beginning of the specified portion of the array.
+      * @param end The end of the specified portion of the array.
+      */
+    slice(start?: number, end?: number): T[];
+    /**
+      * Returns the index of the first occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the search starts at index 0.
+      */
+    indexOf(searchElement: T, fromIndex?: number): number;
+    /**
+      * Returns the index of the last occurrence of a specified value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the search starts at the last index in the array.
+      */
+    lastIndexOf(searchElement: T, fromIndex?: number): number;
+    /**
+      * Determines whether all the members of an array satisfy the specified test.
+      * @param callbackfn A function that accepts up to three arguments. The every method calls the callbackfn function for each element in array1 until the callbackfn returns false, or until the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
+      */
+    every(callbackfn: (value: T, index: number, array: ReadonlyArray<T>) => boolean, thisArg?: any): boolean;
+    /**
+      * Determines whether the specified callback function returns true for any element of an array.
+      * @param callbackfn A function that accepts up to three arguments. The some method calls the callbackfn function for each element in array1 until the callbackfn returns true, or until the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
+      */
+    some(callbackfn: (value: T, index: number, array: ReadonlyArray<T>) => boolean, thisArg?: any): boolean;
+    /**
+      * Performs the specified action for each element in an array.
+      * @param callbackfn  A function that accepts up to three arguments. forEach calls the callbackfn function one time for each element in the array.
+      * @param thisArg  An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
+      */
+    forEach(callbackfn: (value: T, index: number, array: ReadonlyArray<T>) => void, thisArg?: any): void;
+    /**
+      * Calls a defined callback function on each element of an array, and returns an array that contains the results.
+      * @param callbackfn A function that accepts up to three arguments. The map method calls the callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
+      */
+    map<U>(callbackfn: (value: T, index: number, array: ReadonlyArray<T>) => U, thisArg?: any): U[];
+    /**
+     * Returns the elements of an array that meet the condition specified in a callback function.
+     * @param callbackfn A function that accepts up to three arguments. The filter method calls the callbackfn function one time for each element in the array.
+     * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
+     */
+    filter<S extends T>(callbackfn: (value: T, index: number, array: ReadonlyArray<T>) => value is S, thisArg?: any): S[];
+    /**
+      * Returns the elements of an array that meet the condition specified in a callback function.
+      * @param callbackfn A function that accepts up to three arguments. The filter method calls the callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
+      */
+    filter(callbackfn: (value: T, index: number, array: ReadonlyArray<T>) => any, thisArg?: any): T[];
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
+      */
+    reduce(callbackfn: (previousValue: T, currentValue: T, currentIndex: number, array: ReadonlyArray<T>) => T, initialValue?: T): T;
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
+      */
+    reduce<U>(callbackfn: (previousValue: U, currentValue: T, currentIndex: number, array: ReadonlyArray<T>) => U, initialValue: U): U;
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
+      */
+    reduceRight(callbackfn: (previousValue: T, currentValue: T, currentIndex: number, array: ReadonlyArray<T>) => T, initialValue?: T): T;
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
+      */
+    reduceRight<U>(callbackfn: (previousValue: U, currentValue: T, currentIndex: number, array: ReadonlyArray<T>) => U, initialValue: U): U;
+
+    readonly [n: number]: T;
+}
+
+interface Array<T> {
+    /**
+      * Gets or sets the length of the array. This is a number one higher than the highest element defined in an array.
+      */
+    length: number;
+    /**
+      * Returns a string representation of an array.
+      */
+    toString(): string;
+    /**
+      * Returns a string representation of an array. The elements are converted to string using thier toLocalString methods.
+      */
+    toLocaleString(): string;
+    /**
+      * Appends new elements to an array, and returns the new length of the array.
+      * @param items New elements of the Array.
+      */
+    push(...items: T[]): number;
+    /**
+      * Removes the last element from an array and returns it.
+      */
+    pop(): T | undefined;
+    /**
+      * Combines two or more arrays.
+      * @param items Additional items to add to the end of array1.
+      */
+    concat(...items: T[][]): T[];
+    /**
+      * Combines two or more arrays.
+      * @param items Additional items to add to the end of array1.
+      */
+    concat(...items: (T | T[])[]): T[];
+    /**
+      * Adds all the elements of an array separated by the specified separator string.
+      * @param separator A string used to separate one element of an array from the next in the resulting String. If omitted, the array elements are separated with a comma.
+      */
+    join(separator?: string): string;
+    /**
+      * Reverses the elements in an Array.
+      */
+    reverse(): T[];
+    /**
+      * Removes the first element from an array and returns it.
+      */
+    shift(): T | undefined;
+    /**
+      * Returns a section of an array.
+      * @param start The beginning of the specified portion of the array.
+      * @param end The end of the specified portion of the array.
+      */
+    slice(start?: number, end?: number): T[];
+    /**
+      * Sorts an array.
+      * @param compareFn The name of the function used to determine the order of the elements. If omitted, the elements are sorted in ascending, ASCII character order.
+      */
+    sort(compareFn?: (a: T, b: T) => number): this;
+    /**
+      * Removes elements from an array and, if necessary, inserts new elements in their place, returning the deleted elements.
+      * @param start The zero-based location in the array from which to start removing elements.
+      * @param deleteCount The number of elements to remove.
+      */
+    splice(start: number, deleteCount?: number): T[];
+    /**
+      * Removes elements from an array and, if necessary, inserts new elements in their place, returning the deleted elements.
+      * @param start The zero-based location in the array from which to start removing elements.
+      * @param deleteCount The number of elements to remove.
+      * @param items Elements to insert into the array in place of the deleted elements.
+      */
+    splice(start: number, deleteCount: number, ...items: T[]): T[];
+    /**
+      * Inserts new elements at the start of an array.
+      * @param items  Elements to insert at the start of the Array.
+      */
+    unshift(...items: T[]): number;
+    /**
+      * Returns the index of the first occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the search starts at index 0.
+      */
+    indexOf(searchElement: T, fromIndex?: number): number;
+    /**
+      * Returns the index of the last occurrence of a specified value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the search starts at the last index in the array.
+      */
+    lastIndexOf(searchElement: T, fromIndex?: number): number;
+    /**
+      * Determines whether all the members of an array satisfy the specified test.
+      * @param callbackfn A function that accepts up to three arguments. The every method calls the callbackfn function for each element in array1 until the callbackfn returns false, or until the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
+      */
+    every(callbackfn: (value: T, index: number, array: T[]) => boolean, thisArg?: any): boolean;
+    /**
+      * Determines whether the specified callback function returns true for any element of an array.
+      * @param callbackfn A function that accepts up to three arguments. The some method calls the callbackfn function for each element in array1 until the callbackfn returns true, or until the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
+      */
+    some(callbackfn: (value: T, index: number, array: T[]) => boolean, thisArg?: any): boolean;
+    /**
+      * Performs the specified action for each element in an array.
+      * @param callbackfn  A function that accepts up to three arguments. forEach calls the callbackfn function one time for each element in the array.
+      * @param thisArg  An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
+      */
+    forEach(callbackfn: (value: T, index: number, array: T[]) => void, thisArg?: any): void;
+    /**
+      * Calls a defined callback function on each element of an array, and returns an array that contains the results.
+      * @param callbackfn A function that accepts up to three arguments. The map method calls the callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
+      */
+    map<U>(callbackfn: (value: T, index: number, array: T[]) => U, thisArg?: any): U[];
+    /**
+     * Returns the elements of an array that meet the condition specified in a callback function.
+     * @param callbackfn A function that accepts up to three arguments. The filter method calls the callbackfn function one time for each element in the array.
+     * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
+     */
+    filter<S extends T>(callbackfn: (value: T, index: number, array: T[]) => value is S, thisArg?: any): S[];
+    /**
+      * Returns the elements of an array that meet the condition specified in a callback function.
+      * @param callbackfn A function that accepts up to three arguments. The filter method calls the callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
+      */
+    filter(callbackfn: (value: T, index: number, array: T[]) => any, thisArg?: any): T[];
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
+      */
+    reduce(callbackfn: (previousValue: T, currentValue: T, currentIndex: number, array: T[]) => T, initialValue?: T): T;
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
+      */
+    reduce<U>(callbackfn: (previousValue: U, currentValue: T, currentIndex: number, array: T[]) => U, initialValue: U): U;
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
+      */
+    reduceRight(callbackfn: (previousValue: T, currentValue: T, currentIndex: number, array: T[]) => T, initialValue?: T): T;
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
+      */
+    reduceRight<U>(callbackfn: (previousValue: U, currentValue: T, currentIndex: number, array: T[]) => U, initialValue: U): U;
+
+    [n: number]: T;
+}
+
+interface ArrayConstructor {
+    new(arrayLength?: number): any[];
+    new <T>(arrayLength: number): T[];
+    new <T>(...items: T[]): T[];
+    (arrayLength?: number): any[];
+    <T>(arrayLength: number): T[];
+    <T>(...items: T[]): T[];
+    isArray(arg: any): arg is Array<any>;
+    readonly prototype: Array<any>;
+}
+
+declare const Array: ArrayConstructor;
+
+interface TypedPropertyDescriptor<T> {
+    enumerable?: boolean;
+    configurable?: boolean;
+    writable?: boolean;
+    value?: T;
+    get?: () => T;
+    set?: (value: T) => void;
+}
+
+declare type ClassDecorator = <TFunction extends Function>(target: TFunction) => TFunction | void;
+declare type PropertyDecorator = (target: Object, propertyKey: string | symbol) => void;
+declare type MethodDecorator = <T>(target: Object, propertyKey: string | symbol, descriptor: TypedPropertyDescriptor<T>) => TypedPropertyDescriptor<T> | void;
+declare type ParameterDecorator = (target: Object, propertyKey: string | symbol, parameterIndex: number) => void;
+
+declare type PromiseConstructorLike = new <T>(executor: (resolve: (value?: T | PromiseLike<T>) => void, reject: (reason?: any) => void) => void) => PromiseLike<T>;
+
+interface PromiseLike<T> {
+    /**
+     * Attaches callbacks for the resolution and/or rejection of the Promise.
+     * @param onfulfilled The callback to execute when the Promise is resolved.
+     * @param onrejected The callback to execute when the Promise is rejected.
+     * @returns A Promise for the completion of which ever callback is executed.
+     */
+    then<TResult1 = T, TResult2 = never>(onfulfilled?: ((value: T) => TResult1 | PromiseLike<TResult1>) | undefined | null, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | undefined | null): PromiseLike<TResult1 | TResult2>;
+}
+
+/**
+ * Represents the completion of an asynchronous operation
+ */
+interface Promise<T> {
+    /**
+     * Attaches callbacks for the resolution and/or rejection of the Promise.
+     * @param onfulfilled The callback to execute when the Promise is resolved.
+     * @param onrejected The callback to execute when the Promise is rejected.
+     * @returns A Promise for the completion of which ever callback is executed.
+     */
+    then<TResult1 = T, TResult2 = never>(onfulfilled?: ((value: T) => TResult1 | PromiseLike<TResult1>) | undefined | null, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | undefined | null): Promise<TResult1 | TResult2>;
+
+    /**
+     * Attaches a callback for only the rejection of the Promise.
+     * @param onrejected The callback to execute when the Promise is rejected.
+     * @returns A Promise for the completion of the callback.
+     */
+    catch<TResult = never>(onrejected?: ((reason: any) => TResult | PromiseLike<TResult>) | undefined | null): Promise<T | TResult>;
+}
+
+interface ArrayLike<T> {
+    readonly length: number;
+    readonly [n: number]: T;
+}
+
+/**
+ * Make all properties in T optional
+ */
+type Partial<T> = {
+    [P in keyof T]?: T[P];
+};
+
+/**
+ * Make all properties in T readonly
+ */
+type Readonly<T> = {
+    readonly [P in keyof T]: T[P];
+};
+
+/**
+ * From T pick a set of properties K
+ */
+type Pick<T, K extends keyof T> = {
+    [P in K]: T[P];
+};
+
+/**
+ * Construct a type with a set of properties K of type T
+ */
+type Record<K extends string, T> = {
+    [P in K]: T;
+};
+
+/**
+ * Marker for contextual 'this' type
+ */
+interface ThisType<T> { }
+
+/**
+  * Represents a raw buffer of binary data, which is used to store data for the
+  * different typed arrays. ArrayBuffers cannot be read from or written to directly,
+  * but can be passed to a typed array or DataView Object to interpret the raw
+  * buffer as needed.
+  */
+interface ArrayBuffer {
+    /**
+      * Read-only. The length of the ArrayBuffer (in bytes).
+      */
+    readonly byteLength: number;
+
+    /**
+      * Returns a section of an ArrayBuffer.
+      */
+    slice(begin: number, end?: number): ArrayBuffer;
+}
+
+/**
+ * Allowed ArrayBuffer types for the buffer of an ArrayBufferView and related Typed Arrays.
+ */
+interface ArrayBufferTypes {
+    ArrayBuffer: ArrayBuffer;
+}
+type ArrayBufferLike = ArrayBufferTypes[keyof ArrayBufferTypes];
+
+interface ArrayBufferConstructor {
+    readonly prototype: ArrayBuffer;
+    new(byteLength: number): ArrayBuffer;
+    isView(arg: any): arg is ArrayBufferView;
+}
+declare const ArrayBuffer: ArrayBufferConstructor;
+
+interface ArrayBufferView {
+    /**
+      * The ArrayBuffer instance referenced by the array.
+      */
+    buffer: ArrayBufferLike;
+
+    /**
+      * The length in bytes of the array.
+      */
+    byteLength: number;
+
+    /**
+      * The offset in bytes of the array.
+      */
+    byteOffset: number;
+}
+
+interface DataView {
+    readonly buffer: ArrayBuffer;
+    readonly byteLength: number;
+    readonly byteOffset: number;
+    /**
+      * Gets the Float32 value at the specified byte offset from the start of the view. There is
+      * no alignment constraint; multi-byte values may be fetched from any offset.
+      * @param byteOffset The place in the buffer at which the value should be retrieved.
+      */
+    getFloat32(byteOffset: number, littleEndian?: boolean): number;
+
+    /**
+      * Gets the Float64 value at the specified byte offset from the start of the view. There is
+      * no alignment constraint; multi-byte values may be fetched from any offset.
+      * @param byteOffset The place in the buffer at which the value should be retrieved.
+      */
+    getFloat64(byteOffset: number, littleEndian?: boolean): number;
+
+    /**
+      * Gets the Int8 value at the specified byte offset from the start of the view. There is
+      * no alignment constraint; multi-byte values may be fetched from any offset.
+      * @param byteOffset The place in the buffer at which the value should be retrieved.
+      */
+    getInt8(byteOffset: number): number;
+
+    /**
+      * Gets the Int16 value at the specified byte offset from the start of the view. There is
+      * no alignment constraint; multi-byte values may be fetched from any offset.
+      * @param byteOffset The place in the buffer at which the value should be retrieved.
+      */
+    getInt16(byteOffset: number, littleEndian?: boolean): number;
+    /**
+      * Gets the Int32 value at the specified byte offset from the start of the view. There is
+      * no alignment constraint; multi-byte values may be fetched from any offset.
+      * @param byteOffset The place in the buffer at which the value should be retrieved.
+      */
+    getInt32(byteOffset: number, littleEndian?: boolean): number;
+
+    /**
+      * Gets the Uint8 value at the specified byte offset from the start of the view. There is
+      * no alignment constraint; multi-byte values may be fetched from any offset.
+      * @param byteOffset The place in the buffer at which the value should be retrieved.
+      */
+    getUint8(byteOffset: number): number;
+
+    /**
+      * Gets the Uint16 value at the specified byte offset from the start of the view. There is
+      * no alignment constraint; multi-byte values may be fetched from any offset.
+      * @param byteOffset The place in the buffer at which the value should be retrieved.
+      */
+    getUint16(byteOffset: number, littleEndian?: boolean): number;
+
+    /**
+      * Gets the Uint32 value at the specified byte offset from the start of the view. There is
+      * no alignment constraint; multi-byte values may be fetched from any offset.
+      * @param byteOffset The place in the buffer at which the value should be retrieved.
+      */
+    getUint32(byteOffset: number, littleEndian?: boolean): number;
+
+    /**
+      * Stores an Float32 value at the specified byte offset from the start of the view.
+      * @param byteOffset The place in the buffer at which the value should be set.
+      * @param value The value to set.
+      * @param littleEndian If false or undefined, a big-endian value should be written,
+      * otherwise a little-endian value should be written.
+      */
+    setFloat32(byteOffset: number, value: number, littleEndian?: boolean): void;
+
+    /**
+      * Stores an Float64 value at the specified byte offset from the start of the view.
+      * @param byteOffset The place in the buffer at which the value should be set.
+      * @param value The value to set.
+      * @param littleEndian If false or undefined, a big-endian value should be written,
+      * otherwise a little-endian value should be written.
+      */
+    setFloat64(byteOffset: number, value: number, littleEndian?: boolean): void;
+
+    /**
+      * Stores an Int8 value at the specified byte offset from the start of the view.
+      * @param byteOffset The place in the buffer at which the value should be set.
+      * @param value The value to set.
+      */
+    setInt8(byteOffset: number, value: number): void;
+
+    /**
+      * Stores an Int16 value at the specified byte offset from the start of the view.
+      * @param byteOffset The place in the buffer at which the value should be set.
+      * @param value The value to set.
+      * @param littleEndian If false or undefined, a big-endian value should be written,
+      * otherwise a little-endian value should be written.
+      */
+    setInt16(byteOffset: number, value: number, littleEndian?: boolean): void;
+
+    /**
+      * Stores an Int32 value at the specified byte offset from the start of the view.
+      * @param byteOffset The place in the buffer at which the value should be set.
+      * @param value The value to set.
+      * @param littleEndian If false or undefined, a big-endian value should be written,
+      * otherwise a little-endian value should be written.
+      */
+    setInt32(byteOffset: number, value: number, littleEndian?: boolean): void;
+
+    /**
+      * Stores an Uint8 value at the specified byte offset from the start of the view.
+      * @param byteOffset The place in the buffer at which the value should be set.
+      * @param value The value to set.
+      */
+    setUint8(byteOffset: number, value: number): void;
+
+    /**
+      * Stores an Uint16 value at the specified byte offset from the start of the view.
+      * @param byteOffset The place in the buffer at which the value should be set.
+      * @param value The value to set.
+      * @param littleEndian If false or undefined, a big-endian value should be written,
+      * otherwise a little-endian value should be written.
+      */
+    setUint16(byteOffset: number, value: number, littleEndian?: boolean): void;
+
+    /**
+      * Stores an Uint32 value at the specified byte offset from the start of the view.
+      * @param byteOffset The place in the buffer at which the value should be set.
+      * @param value The value to set.
+      * @param littleEndian If false or undefined, a big-endian value should be written,
+      * otherwise a little-endian value should be written.
+      */
+    setUint32(byteOffset: number, value: number, littleEndian?: boolean): void;
+}
+
+interface DataViewConstructor {
+    new(buffer: ArrayBufferLike, byteOffset?: number, byteLength?: number): DataView;
+}
+declare const DataView: DataViewConstructor;
+
+/**
+  * A typed array of 8-bit integer values. The contents are initialized to 0. If the requested
+  * number of bytes could not be allocated an exception is raised.
+  */
+interface Int8Array {
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * The ArrayBuffer instance referenced by the array.
+      */
+    readonly buffer: ArrayBufferLike;
+
+    /**
+      * The length in bytes of the array.
+      */
+    readonly byteLength: number;
+
+    /**
+      * The offset in bytes of the array.
+      */
+    readonly byteOffset: number;
+
+    /**
+      * Returns the this object after copying a section of the array identified by start and end
+      * to the same array starting at position target
+      * @param target If target is negative, it is treated as length+target where length is the
+      * length of the array.
+      * @param start If start is negative, it is treated as length+start. If end is negative, it
+      * is treated as length+end.
+      * @param end If not specified, length of the this object is used as its default value.
+      */
+    copyWithin(target: number, start: number, end?: number): this;
+
+    /**
+      * Determines whether all the members of an array satisfy the specified test.
+      * @param callbackfn A function that accepts up to three arguments. The every method calls
+      * the callbackfn function for each element in array1 until the callbackfn returns false,
+      * or until the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    every(callbackfn: (value: number, index: number, array: Int8Array) => boolean, thisArg?: any): boolean;
+
+    /**
+        * Returns the this object after filling the section identified by start and end with value
+        * @param value value to fill array section with
+        * @param start index to start filling the array at. If start is negative, it is treated as
+        * length+start where length is the length of the array.
+        * @param end index to stop filling the array at. If end is negative, it is treated as
+        * length+end.
+        */
+    fill(value: number, start?: number, end?: number): this;
+
+    /**
+      * Returns the elements of an array that meet the condition specified in a callback function.
+      * @param callbackfn A function that accepts up to three arguments. The filter method calls
+      * the callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    filter(callbackfn: (value: number, index: number, array: Int8Array) => any, thisArg?: any): Int8Array;
+
+    /**
+      * Returns the value of the first element in the array where predicate is true, and undefined
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found, find
+      * immediately returns that element value. Otherwise, find returns undefined.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
+
+    /**
+      * Returns the index of the first element in the array where predicate is true, and -1
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found,
+      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
+
+    /**
+      * Performs the specified action for each element in an array.
+      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    forEach(callbackfn: (value: number, index: number, array: Int8Array) => void, thisArg?: any): void;
+
+    /**
+      * Returns the index of the first occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      *  search starts at index 0.
+      */
+    indexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * Adds all the elements of an array separated by the specified separator string.
+      * @param separator A string used to separate one element of an array from the next in the
+      * resulting String. If omitted, the array elements are separated with a comma.
+      */
+    join(separator?: string): string;
+
+    /**
+      * Returns the index of the last occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      * search starts at index 0.
+      */
+    lastIndexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * The length of the array.
+      */
+    readonly length: number;
+
+    /**
+      * Calls a defined callback function on each element of an array, and returns an array that
+      * contains the results.
+      * @param callbackfn A function that accepts up to three arguments. The map method calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    map(callbackfn: (this: void, value: number, index: number, array: Int8Array) => number, thisArg?: any): Int8Array;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Int8Array) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Int8Array) => U, initialValue: U): U;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an
+      * argument instead of an array value.
+      */
+    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Int8Array) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Int8Array) => U, initialValue: U): U;
+
+    /**
+      * Reverses the elements in an Array.
+      */
+    reverse(): Int8Array;
+
+    /**
+      * Sets a value or an array of values.
+      * @param array A typed or untyped array of values to set.
+      * @param offset The index in the current array at which the values are to be written.
+      */
+    set(array: ArrayLike<number>, offset?: number): void;
+
+    /**
+      * Returns a section of an array.
+      * @param start The beginning of the specified portion of the array.
+      * @param end The end of the specified portion of the array.
+      */
+    slice(start?: number, end?: number): Int8Array;
+
+    /**
+      * Determines whether the specified callback function returns true for any element of an array.
+      * @param callbackfn A function that accepts up to three arguments. The some method calls the
+      * callbackfn function for each element in array1 until the callbackfn returns true, or until
+      * the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    some(callbackfn: (value: number, index: number, array: Int8Array) => boolean, thisArg?: any): boolean;
+
+    /**
+      * Sorts an array.
+      * @param compareFn The name of the function used to determine the order of the elements. If
+      * omitted, the elements are sorted in ascending, ASCII character order.
+      */
+    sort(compareFn?: (a: number, b: number) => number): this;
+
+    /**
+      * Gets a new Int8Array view of the ArrayBuffer store for this array, referencing the elements
+      * at begin, inclusive, up to end, exclusive.
+      * @param begin The index of the beginning of the array.
+      * @param end The index of the end of the array.
+      */
+    subarray(begin: number, end?: number): Int8Array;
+
+    /**
+      * Converts a number to a string by using the current locale.
+      */
+    toLocaleString(): string;
+
+    /**
+      * Returns a string representation of an array.
+      */
+    toString(): string;
+
+    [index: number]: number;
+}
+interface Int8ArrayConstructor {
+    readonly prototype: Int8Array;
+    new(length: number): Int8Array;
+    new(array: ArrayLike<number>): Int8Array;
+    new(buffer: ArrayBufferLike, byteOffset?: number, length?: number): Int8Array;
+
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * Returns a new array from a set of elements.
+      * @param items A set of elements to include in the new array object.
+      */
+    of(...items: number[]): Int8Array;
+
+    /**
+      * Creates an array from an array-like or iterable object.
+      * @param arrayLike An array-like or iterable object to convert to an array.
+      * @param mapfn A mapping function to call on every element of the array.
+      * @param thisArg Value of 'this' used to invoke the mapfn.
+      */
+    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Int8Array;
+
+
+}
+declare const Int8Array: Int8ArrayConstructor;
+
+/**
+  * A typed array of 8-bit unsigned integer values. The contents are initialized to 0. If the
+  * requested number of bytes could not be allocated an exception is raised.
+  */
+interface Uint8Array {
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * The ArrayBuffer instance referenced by the array.
+      */
+    readonly buffer: ArrayBufferLike;
+
+    /**
+      * The length in bytes of the array.
+      */
+    readonly byteLength: number;
+
+    /**
+      * The offset in bytes of the array.
+      */
+    readonly byteOffset: number;
+
+    /**
+      * Returns the this object after copying a section of the array identified by start and end
+      * to the same array starting at position target
+      * @param target If target is negative, it is treated as length+target where length is the
+      * length of the array.
+      * @param start If start is negative, it is treated as length+start. If end is negative, it
+      * is treated as length+end.
+      * @param end If not specified, length of the this object is used as its default value.
+      */
+    copyWithin(target: number, start: number, end?: number): this;
+
+    /**
+      * Determines whether all the members of an array satisfy the specified test.
+      * @param callbackfn A function that accepts up to three arguments. The every method calls
+      * the callbackfn function for each element in array1 until the callbackfn returns false,
+      * or until the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    every(callbackfn: (value: number, index: number, array: Uint8Array) => boolean, thisArg?: any): boolean;
+
+    /**
+        * Returns the this object after filling the section identified by start and end with value
+        * @param value value to fill array section with
+        * @param start index to start filling the array at. If start is negative, it is treated as
+        * length+start where length is the length of the array.
+        * @param end index to stop filling the array at. If end is negative, it is treated as
+        * length+end.
+        */
+    fill(value: number, start?: number, end?: number): this;
+
+    /**
+      * Returns the elements of an array that meet the condition specified in a callback function.
+      * @param callbackfn A function that accepts up to three arguments. The filter method calls
+      * the callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    filter(callbackfn: (value: number, index: number, array: Uint8Array) => any, thisArg?: any): Uint8Array;
+
+    /**
+      * Returns the value of the first element in the array where predicate is true, and undefined
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found, find
+      * immediately returns that element value. Otherwise, find returns undefined.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
+
+    /**
+      * Returns the index of the first element in the array where predicate is true, and -1
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found,
+      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
+
+    /**
+      * Performs the specified action for each element in an array.
+      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    forEach(callbackfn: (value: number, index: number, array: Uint8Array) => void, thisArg?: any): void;
+
+    /**
+      * Returns the index of the first occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      *  search starts at index 0.
+      */
+    indexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * Adds all the elements of an array separated by the specified separator string.
+      * @param separator A string used to separate one element of an array from the next in the
+      * resulting String. If omitted, the array elements are separated with a comma.
+      */
+    join(separator?: string): string;
+
+    /**
+      * Returns the index of the last occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      * search starts at index 0.
+      */
+    lastIndexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * The length of the array.
+      */
+    readonly length: number;
+
+    /**
+      * Calls a defined callback function on each element of an array, and returns an array that
+      * contains the results.
+      * @param callbackfn A function that accepts up to three arguments. The map method calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    map(callbackfn: (this: void, value: number, index: number, array: Uint8Array) => number, thisArg?: any): Uint8Array;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Uint8Array) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Uint8Array) => U, initialValue: U): U;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an
+      * argument instead of an array value.
+      */
+    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Uint8Array) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Uint8Array) => U, initialValue: U): U;
+
+    /**
+      * Reverses the elements in an Array.
+      */
+    reverse(): Uint8Array;
+
+    /**
+      * Sets a value or an array of values.
+      * @param array A typed or untyped array of values to set.
+      * @param offset The index in the current array at which the values are to be written.
+      */
+    set(array: ArrayLike<number>, offset?: number): void;
+
+    /**
+      * Returns a section of an array.
+      * @param start The beginning of the specified portion of the array.
+      * @param end The end of the specified portion of the array.
+      */
+    slice(start?: number, end?: number): Uint8Array;
+
+    /**
+      * Determines whether the specified callback function returns true for any element of an array.
+      * @param callbackfn A function that accepts up to three arguments. The some method calls the
+      * callbackfn function for each element in array1 until the callbackfn returns true, or until
+      * the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    some(callbackfn: (value: number, index: number, array: Uint8Array) => boolean, thisArg?: any): boolean;
+
+    /**
+      * Sorts an array.
+      * @param compareFn The name of the function used to determine the order of the elements. If
+      * omitted, the elements are sorted in ascending, ASCII character order.
+      */
+    sort(compareFn?: (a: number, b: number) => number): this;
+
+    /**
+      * Gets a new Uint8Array view of the ArrayBuffer store for this array, referencing the elements
+      * at begin, inclusive, up to end, exclusive.
+      * @param begin The index of the beginning of the array.
+      * @param end The index of the end of the array.
+      */
+    subarray(begin: number, end?: number): Uint8Array;
+
+    /**
+      * Converts a number to a string by using the current locale.
+      */
+    toLocaleString(): string;
+
+    /**
+      * Returns a string representation of an array.
+      */
+    toString(): string;
+
+    [index: number]: number;
+}
+
+interface Uint8ArrayConstructor {
+    readonly prototype: Uint8Array;
+    new(length: number): Uint8Array;
+    new(array: ArrayLike<number>): Uint8Array;
+    new(buffer: ArrayBufferLike, byteOffset?: number, length?: number): Uint8Array;
+
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * Returns a new array from a set of elements.
+      * @param items A set of elements to include in the new array object.
+      */
+    of(...items: number[]): Uint8Array;
+
+    /**
+      * Creates an array from an array-like or iterable object.
+      * @param arrayLike An array-like or iterable object to convert to an array.
+      * @param mapfn A mapping function to call on every element of the array.
+      * @param thisArg Value of 'this' used to invoke the mapfn.
+      */
+    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Uint8Array;
+
+}
+declare const Uint8Array: Uint8ArrayConstructor;
+
+/**
+  * A typed array of 8-bit unsigned integer (clamped) values. The contents are initialized to 0.
+  * If the requested number of bytes could not be allocated an exception is raised.
+  */
+interface Uint8ClampedArray {
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * The ArrayBuffer instance referenced by the array.
+      */
+    readonly buffer: ArrayBufferLike;
+
+    /**
+      * The length in bytes of the array.
+      */
+    readonly byteLength: number;
+
+    /**
+      * The offset in bytes of the array.
+      */
+    readonly byteOffset: number;
+
+    /**
+      * Returns the this object after copying a section of the array identified by start and end
+      * to the same array starting at position target
+      * @param target If target is negative, it is treated as length+target where length is the
+      * length of the array.
+      * @param start If start is negative, it is treated as length+start. If end is negative, it
+      * is treated as length+end.
+      * @param end If not specified, length of the this object is used as its default value.
+      */
+    copyWithin(target: number, start: number, end?: number): this;
+
+    /**
+      * Determines whether all the members of an array satisfy the specified test.
+      * @param callbackfn A function that accepts up to three arguments. The every method calls
+      * the callbackfn function for each element in array1 until the callbackfn returns false,
+      * or until the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    every(callbackfn: (value: number, index: number, array: Uint8ClampedArray) => boolean, thisArg?: any): boolean;
+
+    /**
+        * Returns the this object after filling the section identified by start and end with value
+        * @param value value to fill array section with
+        * @param start index to start filling the array at. If start is negative, it is treated as
+        * length+start where length is the length of the array.
+        * @param end index to stop filling the array at. If end is negative, it is treated as
+        * length+end.
+        */
+    fill(value: number, start?: number, end?: number): this;
+
+    /**
+      * Returns the elements of an array that meet the condition specified in a callback function.
+      * @param callbackfn A function that accepts up to three arguments. The filter method calls
+      * the callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    filter(callbackfn: (value: number, index: number, array: Uint8ClampedArray) => any, thisArg?: any): Uint8ClampedArray;
+
+    /**
+      * Returns the value of the first element in the array where predicate is true, and undefined
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found, find
+      * immediately returns that element value. Otherwise, find returns undefined.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
+
+    /**
+      * Returns the index of the first element in the array where predicate is true, and -1
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found,
+      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
+
+    /**
+      * Performs the specified action for each element in an array.
+      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    forEach(callbackfn: (value: number, index: number, array: Uint8ClampedArray) => void, thisArg?: any): void;
+
+    /**
+      * Returns the index of the first occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      *  search starts at index 0.
+      */
+    indexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * Adds all the elements of an array separated by the specified separator string.
+      * @param separator A string used to separate one element of an array from the next in the
+      * resulting String. If omitted, the array elements are separated with a comma.
+      */
+    join(separator?: string): string;
+
+    /**
+      * Returns the index of the last occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      * search starts at index 0.
+      */
+    lastIndexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * The length of the array.
+      */
+    readonly length: number;
+
+    /**
+      * Calls a defined callback function on each element of an array, and returns an array that
+      * contains the results.
+      * @param callbackfn A function that accepts up to three arguments. The map method calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    map(callbackfn: (this: void, value: number, index: number, array: Uint8ClampedArray) => number, thisArg?: any): Uint8ClampedArray;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Uint8ClampedArray) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Uint8ClampedArray) => U, initialValue: U): U;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an
+      * argument instead of an array value.
+      */
+    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Uint8ClampedArray) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Uint8ClampedArray) => U, initialValue: U): U;
+
+    /**
+      * Reverses the elements in an Array.
+      */
+    reverse(): Uint8ClampedArray;
+
+    /**
+      * Sets a value or an array of values.
+      * @param array A typed or untyped array of values to set.
+      * @param offset The index in the current array at which the values are to be written.
+      */
+    set(array: ArrayLike<number>, offset?: number): void;
+
+    /**
+      * Returns a section of an array.
+      * @param start The beginning of the specified portion of the array.
+      * @param end The end of the specified portion of the array.
+      */
+    slice(start?: number, end?: number): Uint8ClampedArray;
+
+    /**
+      * Determines whether the specified callback function returns true for any element of an array.
+      * @param callbackfn A function that accepts up to three arguments. The some method calls the
+      * callbackfn function for each element in array1 until the callbackfn returns true, or until
+      * the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    some(callbackfn: (value: number, index: number, array: Uint8ClampedArray) => boolean, thisArg?: any): boolean;
+
+    /**
+      * Sorts an array.
+      * @param compareFn The name of the function used to determine the order of the elements. If
+      * omitted, the elements are sorted in ascending, ASCII character order.
+      */
+    sort(compareFn?: (a: number, b: number) => number): this;
+
+    /**
+      * Gets a new Uint8ClampedArray view of the ArrayBuffer store for this array, referencing the elements
+      * at begin, inclusive, up to end, exclusive.
+      * @param begin The index of the beginning of the array.
+      * @param end The index of the end of the array.
+      */
+    subarray(begin: number, end?: number): Uint8ClampedArray;
+
+    /**
+      * Converts a number to a string by using the current locale.
+      */
+    toLocaleString(): string;
+
+    /**
+      * Returns a string representation of an array.
+      */
+    toString(): string;
+
+    [index: number]: number;
+}
+
+interface Uint8ClampedArrayConstructor {
+    readonly prototype: Uint8ClampedArray;
+    new(length: number): Uint8ClampedArray;
+    new(array: ArrayLike<number>): Uint8ClampedArray;
+    new(buffer: ArrayBufferLike, byteOffset?: number, length?: number): Uint8ClampedArray;
+
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * Returns a new array from a set of elements.
+      * @param items A set of elements to include in the new array object.
+      */
+    of(...items: number[]): Uint8ClampedArray;
+
+    /**
+      * Creates an array from an array-like or iterable object.
+      * @param arrayLike An array-like or iterable object to convert to an array.
+      * @param mapfn A mapping function to call on every element of the array.
+      * @param thisArg Value of 'this' used to invoke the mapfn.
+      */
+    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Uint8ClampedArray;
+}
+declare const Uint8ClampedArray: Uint8ClampedArrayConstructor;
+
+/**
+  * A typed array of 16-bit signed integer values. The contents are initialized to 0. If the
+  * requested number of bytes could not be allocated an exception is raised.
+  */
+interface Int16Array {
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * The ArrayBuffer instance referenced by the array.
+      */
+    readonly buffer: ArrayBufferLike;
+
+    /**
+      * The length in bytes of the array.
+      */
+    readonly byteLength: number;
+
+    /**
+      * The offset in bytes of the array.
+      */
+    readonly byteOffset: number;
+
+    /**
+      * Returns the this object after copying a section of the array identified by start and end
+      * to the same array starting at position target
+      * @param target If target is negative, it is treated as length+target where length is the
+      * length of the array.
+      * @param start If start is negative, it is treated as length+start. If end is negative, it
+      * is treated as length+end.
+      * @param end If not specified, length of the this object is used as its default value.
+      */
+    copyWithin(target: number, start: number, end?: number): this;
+
+    /**
+      * Determines whether all the members of an array satisfy the specified test.
+      * @param callbackfn A function that accepts up to three arguments. The every method calls
+      * the callbackfn function for each element in array1 until the callbackfn returns false,
+      * or until the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    every(callbackfn: (value: number, index: number, array: Int16Array) => boolean, thisArg?: any): boolean;
+
+    /**
+        * Returns the this object after filling the section identified by start and end with value
+        * @param value value to fill array section with
+        * @param start index to start filling the array at. If start is negative, it is treated as
+        * length+start where length is the length of the array.
+        * @param end index to stop filling the array at. If end is negative, it is treated as
+        * length+end.
+        */
+    fill(value: number, start?: number, end?: number): this;
+
+    /**
+      * Returns the elements of an array that meet the condition specified in a callback function.
+      * @param callbackfn A function that accepts up to three arguments. The filter method calls
+      * the callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    filter(callbackfn: (this: void, value: number, index: number, array: Int16Array) => any, thisArg?: any): Int16Array;
+
+    /**
+      * Returns the value of the first element in the array where predicate is true, and undefined
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found, find
+      * immediately returns that element value. Otherwise, find returns undefined.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
+
+    /**
+      * Returns the index of the first element in the array where predicate is true, and -1
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found,
+      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
+
+    /**
+      * Performs the specified action for each element in an array.
+      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    forEach(callbackfn: (value: number, index: number, array: Int16Array) => void, thisArg?: any): void;
+    /**
+      * Returns the index of the first occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      *  search starts at index 0.
+      */
+    indexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * Adds all the elements of an array separated by the specified separator string.
+      * @param separator A string used to separate one element of an array from the next in the
+      * resulting String. If omitted, the array elements are separated with a comma.
+      */
+    join(separator?: string): string;
+
+    /**
+      * Returns the index of the last occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      * search starts at index 0.
+      */
+    lastIndexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * The length of the array.
+      */
+    readonly length: number;
+
+    /**
+      * Calls a defined callback function on each element of an array, and returns an array that
+      * contains the results.
+      * @param callbackfn A function that accepts up to three arguments. The map method calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    map(callbackfn: (this: void, value: number, index: number, array: Int16Array) => number, thisArg?: any): Int16Array;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Int16Array) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Int16Array) => U, initialValue: U): U;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an
+      * argument instead of an array value.
+      */
+    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Int16Array) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Int16Array) => U, initialValue: U): U;
+
+    /**
+      * Reverses the elements in an Array.
+      */
+    reverse(): Int16Array;
+
+    /**
+      * Sets a value or an array of values.
+      * @param array A typed or untyped array of values to set.
+      * @param offset The index in the current array at which the values are to be written.
+      */
+    set(array: ArrayLike<number>, offset?: number): void;
+
+    /**
+      * Returns a section of an array.
+      * @param start The beginning of the specified portion of the array.
+      * @param end The end of the specified portion of the array.
+      */
+    slice(start?: number, end?: number): Int16Array;
+
+    /**
+      * Determines whether the specified callback function returns true for any element of an array.
+      * @param callbackfn A function that accepts up to three arguments. The some method calls the
+      * callbackfn function for each element in array1 until the callbackfn returns true, or until
+      * the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    some(callbackfn: (value: number, index: number, array: Int16Array) => boolean, thisArg?: any): boolean;
+
+    /**
+      * Sorts an array.
+      * @param compareFn The name of the function used to determine the order of the elements. If
+      * omitted, the elements are sorted in ascending, ASCII character order.
+      */
+    sort(compareFn?: (a: number, b: number) => number): this;
+
+    /**
+      * Gets a new Int16Array view of the ArrayBuffer store for this array, referencing the elements
+      * at begin, inclusive, up to end, exclusive.
+      * @param begin The index of the beginning of the array.
+      * @param end The index of the end of the array.
+      */
+    subarray(begin: number, end?: number): Int16Array;
+
+    /**
+      * Converts a number to a string by using the current locale.
+      */
+    toLocaleString(): string;
+
+    /**
+      * Returns a string representation of an array.
+      */
+    toString(): string;
+
+    [index: number]: number;
+}
+
+interface Int16ArrayConstructor {
+    readonly prototype: Int16Array;
+    new(length: number): Int16Array;
+    new(array: ArrayLike<number>): Int16Array;
+    new(buffer: ArrayBufferLike, byteOffset?: number, length?: number): Int16Array;
+
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * Returns a new array from a set of elements.
+      * @param items A set of elements to include in the new array object.
+      */
+    of(...items: number[]): Int16Array;
+
+    /**
+      * Creates an array from an array-like or iterable object.
+      * @param arrayLike An array-like or iterable object to convert to an array.
+      * @param mapfn A mapping function to call on every element of the array.
+      * @param thisArg Value of 'this' used to invoke the mapfn.
+      */
+    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Int16Array;
+
+
+}
+declare const Int16Array: Int16ArrayConstructor;
+
+/**
+  * A typed array of 16-bit unsigned integer values. The contents are initialized to 0. If the
+  * requested number of bytes could not be allocated an exception is raised.
+  */
+interface Uint16Array {
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * The ArrayBuffer instance referenced by the array.
+      */
+    readonly buffer: ArrayBufferLike;
+
+    /**
+      * The length in bytes of the array.
+      */
+    readonly byteLength: number;
+
+    /**
+      * The offset in bytes of the array.
+      */
+    readonly byteOffset: number;
+
+    /**
+      * Returns the this object after copying a section of the array identified by start and end
+      * to the same array starting at position target
+      * @param target If target is negative, it is treated as length+target where length is the
+      * length of the array.
+      * @param start If start is negative, it is treated as length+start. If end is negative, it
+      * is treated as length+end.
+      * @param end If not specified, length of the this object is used as its default value.
+      */
+    copyWithin(target: number, start: number, end?: number): this;
+
+    /**
+      * Determines whether all the members of an array satisfy the specified test.
+      * @param callbackfn A function that accepts up to three arguments. The every method calls
+      * the callbackfn function for each element in array1 until the callbackfn returns false,
+      * or until the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    every(callbackfn: (value: number, index: number, array: Uint16Array) => boolean, thisArg?: any): boolean;
+
+    /**
+        * Returns the this object after filling the section identified by start and end with value
+        * @param value value to fill array section with
+        * @param start index to start filling the array at. If start is negative, it is treated as
+        * length+start where length is the length of the array.
+        * @param end index to stop filling the array at. If end is negative, it is treated as
+        * length+end.
+        */
+    fill(value: number, start?: number, end?: number): this;
+
+    /**
+      * Returns the elements of an array that meet the condition specified in a callback function.
+      * @param callbackfn A function that accepts up to three arguments. The filter method calls
+      * the callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    filter(callbackfn: (value: number, index: number, array: Uint16Array) => any, thisArg?: any): Uint16Array;
+
+    /**
+      * Returns the value of the first element in the array where predicate is true, and undefined
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found, find
+      * immediately returns that element value. Otherwise, find returns undefined.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
+
+    /**
+      * Returns the index of the first element in the array where predicate is true, and -1
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found,
+      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
+
+    /**
+      * Performs the specified action for each element in an array.
+      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    forEach(callbackfn: (value: number, index: number, array: Uint16Array) => void, thisArg?: any): void;
+
+    /**
+      * Returns the index of the first occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      *  search starts at index 0.
+      */
+    indexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * Adds all the elements of an array separated by the specified separator string.
+      * @param separator A string used to separate one element of an array from the next in the
+      * resulting String. If omitted, the array elements are separated with a comma.
+      */
+    join(separator?: string): string;
+
+    /**
+      * Returns the index of the last occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      * search starts at index 0.
+      */
+    lastIndexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * The length of the array.
+      */
+    readonly length: number;
+
+    /**
+      * Calls a defined callback function on each element of an array, and returns an array that
+      * contains the results.
+      * @param callbackfn A function that accepts up to three arguments. The map method calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    map(callbackfn: (this: void, value: number, index: number, array: Uint16Array) => number, thisArg?: any): Uint16Array;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Uint16Array) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Uint16Array) => U, initialValue: U): U;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an
+      * argument instead of an array value.
+      */
+    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Uint16Array) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Uint16Array) => U, initialValue: U): U;
+
+    /**
+      * Reverses the elements in an Array.
+      */
+    reverse(): Uint16Array;
+
+    /**
+      * Sets a value or an array of values.
+      * @param array A typed or untyped array of values to set.
+      * @param offset The index in the current array at which the values are to be written.
+      */
+    set(array: ArrayLike<number>, offset?: number): void;
+
+    /**
+      * Returns a section of an array.
+      * @param start The beginning of the specified portion of the array.
+      * @param end The end of the specified portion of the array.
+      */
+    slice(start?: number, end?: number): Uint16Array;
+
+    /**
+      * Determines whether the specified callback function returns true for any element of an array.
+      * @param callbackfn A function that accepts up to three arguments. The some method calls the
+      * callbackfn function for each element in array1 until the callbackfn returns true, or until
+      * the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    some(callbackfn: (value: number, index: number, array: Uint16Array) => boolean, thisArg?: any): boolean;
+
+    /**
+      * Sorts an array.
+      * @param compareFn The name of the function used to determine the order of the elements. If
+      * omitted, the elements are sorted in ascending, ASCII character order.
+      */
+    sort(compareFn?: (a: number, b: number) => number): this;
+
+    /**
+      * Gets a new Uint16Array view of the ArrayBuffer store for this array, referencing the elements
+      * at begin, inclusive, up to end, exclusive.
+      * @param begin The index of the beginning of the array.
+      * @param end The index of the end of the array.
+      */
+    subarray(begin: number, end?: number): Uint16Array;
+
+    /**
+      * Converts a number to a string by using the current locale.
+      */
+    toLocaleString(): string;
+
+    /**
+      * Returns a string representation of an array.
+      */
+    toString(): string;
+
+    [index: number]: number;
+}
+
+interface Uint16ArrayConstructor {
+    readonly prototype: Uint16Array;
+    new(length: number): Uint16Array;
+    new(array: ArrayLike<number>): Uint16Array;
+    new(buffer: ArrayBufferLike, byteOffset?: number, length?: number): Uint16Array;
+
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * Returns a new array from a set of elements.
+      * @param items A set of elements to include in the new array object.
+      */
+    of(...items: number[]): Uint16Array;
+
+    /**
+      * Creates an array from an array-like or iterable object.
+      * @param arrayLike An array-like or iterable object to convert to an array.
+      * @param mapfn A mapping function to call on every element of the array.
+      * @param thisArg Value of 'this' used to invoke the mapfn.
+      */
+    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Uint16Array;
+
+
+}
+declare const Uint16Array: Uint16ArrayConstructor;
+/**
+  * A typed array of 32-bit signed integer values. The contents are initialized to 0. If the
+  * requested number of bytes could not be allocated an exception is raised.
+  */
+interface Int32Array {
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * The ArrayBuffer instance referenced by the array.
+      */
+    readonly buffer: ArrayBufferLike;
+
+    /**
+      * The length in bytes of the array.
+      */
+    readonly byteLength: number;
+
+    /**
+      * The offset in bytes of the array.
+      */
+    readonly byteOffset: number;
+
+    /**
+      * Returns the this object after copying a section of the array identified by start and end
+      * to the same array starting at position target
+      * @param target If target is negative, it is treated as length+target where length is the
+      * length of the array.
+      * @param start If start is negative, it is treated as length+start. If end is negative, it
+      * is treated as length+end.
+      * @param end If not specified, length of the this object is used as its default value.
+      */
+    copyWithin(target: number, start: number, end?: number): this;
+
+    /**
+      * Determines whether all the members of an array satisfy the specified test.
+      * @param callbackfn A function that accepts up to three arguments. The every method calls
+      * the callbackfn function for each element in array1 until the callbackfn returns false,
+      * or until the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    every(callbackfn: (value: number, index: number, array: Int32Array) => boolean, thisArg?: any): boolean;
+
+    /**
+        * Returns the this object after filling the section identified by start and end with value
+        * @param value value to fill array section with
+        * @param start index to start filling the array at. If start is negative, it is treated as
+        * length+start where length is the length of the array.
+        * @param end index to stop filling the array at. If end is negative, it is treated as
+        * length+end.
+        */
+    fill(value: number, start?: number, end?: number): this;
+
+    /**
+      * Returns the elements of an array that meet the condition specified in a callback function.
+      * @param callbackfn A function that accepts up to three arguments. The filter method calls
+      * the callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    filter(callbackfn: (value: number, index: number, array: Int32Array) => any, thisArg?: any): Int32Array;
+
+    /**
+      * Returns the value of the first element in the array where predicate is true, and undefined
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found, find
+      * immediately returns that element value. Otherwise, find returns undefined.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
+
+    /**
+      * Returns the index of the first element in the array where predicate is true, and -1
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found,
+      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
+
+    /**
+      * Performs the specified action for each element in an array.
+      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    forEach(callbackfn: (value: number, index: number, array: Int32Array) => void, thisArg?: any): void;
+
+    /**
+      * Returns the index of the first occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      *  search starts at index 0.
+      */
+    indexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * Adds all the elements of an array separated by the specified separator string.
+      * @param separator A string used to separate one element of an array from the next in the
+      * resulting String. If omitted, the array elements are separated with a comma.
+      */
+    join(separator?: string): string;
+
+    /**
+      * Returns the index of the last occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      * search starts at index 0.
+      */
+    lastIndexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * The length of the array.
+      */
+    readonly length: number;
+
+    /**
+      * Calls a defined callback function on each element of an array, and returns an array that
+      * contains the results.
+      * @param callbackfn A function that accepts up to three arguments. The map method calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    map(callbackfn: (value: number, index: number, array: Int32Array) => number, thisArg?: any): Int32Array;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Int32Array) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Int32Array) => U, initialValue: U): U;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an
+      * argument instead of an array value.
+      */
+    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Int32Array) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Int32Array) => U, initialValue: U): U;
+
+    /**
+      * Reverses the elements in an Array.
+      */
+    reverse(): Int32Array;
+
+    /**
+      * Sets a value or an array of values.
+      * @param array A typed or untyped array of values to set.
+      * @param offset The index in the current array at which the values are to be written.
+      */
+    set(array: ArrayLike<number>, offset?: number): void;
+
+    /**
+      * Returns a section of an array.
+      * @param start The beginning of the specified portion of the array.
+      * @param end The end of the specified portion of the array.
+      */
+    slice(start?: number, end?: number): Int32Array;
+
+    /**
+      * Determines whether the specified callback function returns true for any element of an array.
+      * @param callbackfn A function that accepts up to three arguments. The some method calls the
+      * callbackfn function for each element in array1 until the callbackfn returns true, or until
+      * the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    some(callbackfn: (value: number, index: number, array: Int32Array) => boolean, thisArg?: any): boolean;
+
+    /**
+      * Sorts an array.
+      * @param compareFn The name of the function used to determine the order of the elements. If
+      * omitted, the elements are sorted in ascending, ASCII character order.
+      */
+    sort(compareFn?: (a: number, b: number) => number): this;
+
+    /**
+      * Gets a new Int32Array view of the ArrayBuffer store for this array, referencing the elements
+      * at begin, inclusive, up to end, exclusive.
+      * @param begin The index of the beginning of the array.
+      * @param end The index of the end of the array.
+      */
+    subarray(begin: number, end?: number): Int32Array;
+
+    /**
+      * Converts a number to a string by using the current locale.
+      */
+    toLocaleString(): string;
+
+    /**
+      * Returns a string representation of an array.
+      */
+    toString(): string;
+
+    [index: number]: number;
+}
+
+interface Int32ArrayConstructor {
+    readonly prototype: Int32Array;
+    new(length: number): Int32Array;
+    new(array: ArrayLike<number>): Int32Array;
+    new(buffer: ArrayBufferLike, byteOffset?: number, length?: number): Int32Array;
+
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * Returns a new array from a set of elements.
+      * @param items A set of elements to include in the new array object.
+      */
+    of(...items: number[]): Int32Array;
+
+    /**
+      * Creates an array from an array-like or iterable object.
+      * @param arrayLike An array-like or iterable object to convert to an array.
+      * @param mapfn A mapping function to call on every element of the array.
+      * @param thisArg Value of 'this' used to invoke the mapfn.
+      */
+    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Int32Array;
+
+}
+declare const Int32Array: Int32ArrayConstructor;
+
+/**
+  * A typed array of 32-bit unsigned integer values. The contents are initialized to 0. If the
+  * requested number of bytes could not be allocated an exception is raised.
+  */
+interface Uint32Array {
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * The ArrayBuffer instance referenced by the array.
+      */
+    readonly buffer: ArrayBufferLike;
+
+    /**
+      * The length in bytes of the array.
+      */
+    readonly byteLength: number;
+
+    /**
+      * The offset in bytes of the array.
+      */
+    readonly byteOffset: number;
+
+    /**
+      * Returns the this object after copying a section of the array identified by start and end
+      * to the same array starting at position target
+      * @param target If target is negative, it is treated as length+target where length is the
+      * length of the array.
+      * @param start If start is negative, it is treated as length+start. If end is negative, it
+      * is treated as length+end.
+      * @param end If not specified, length of the this object is used as its default value.
+      */
+    copyWithin(target: number, start: number, end?: number): this;
+
+    /**
+      * Determines whether all the members of an array satisfy the specified test.
+      * @param callbackfn A function that accepts up to three arguments. The every method calls
+      * the callbackfn function for each element in array1 until the callbackfn returns false,
+      * or until the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    every(callbackfn: (value: number, index: number, array: Uint32Array) => boolean, thisArg?: any): boolean;
+
+    /**
+        * Returns the this object after filling the section identified by start and end with value
+        * @param value value to fill array section with
+        * @param start index to start filling the array at. If start is negative, it is treated as
+        * length+start where length is the length of the array.
+        * @param end index to stop filling the array at. If end is negative, it is treated as
+        * length+end.
+        */
+    fill(value: number, start?: number, end?: number): this;
+
+    /**
+      * Returns the elements of an array that meet the condition specified in a callback function.
+      * @param callbackfn A function that accepts up to three arguments. The filter method calls
+      * the callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    filter(callbackfn: (value: number, index: number, array: Uint32Array) => any, thisArg?: any): Uint32Array;
+
+    /**
+      * Returns the value of the first element in the array where predicate is true, and undefined
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found, find
+      * immediately returns that element value. Otherwise, find returns undefined.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
+
+    /**
+      * Returns the index of the first element in the array where predicate is true, and -1
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found,
+      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
+
+    /**
+      * Performs the specified action for each element in an array.
+      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    forEach(callbackfn: (value: number, index: number, array: Uint32Array) => void, thisArg?: any): void;
+    /**
+      * Returns the index of the first occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      *  search starts at index 0.
+      */
+    indexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * Adds all the elements of an array separated by the specified separator string.
+      * @param separator A string used to separate one element of an array from the next in the
+      * resulting String. If omitted, the array elements are separated with a comma.
+      */
+    join(separator?: string): string;
+
+    /**
+      * Returns the index of the last occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      * search starts at index 0.
+      */
+    lastIndexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * The length of the array.
+      */
+    readonly length: number;
+
+    /**
+      * Calls a defined callback function on each element of an array, and returns an array that
+      * contains the results.
+      * @param callbackfn A function that accepts up to three arguments. The map method calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    map(callbackfn: (this: void, value: number, index: number, array: Uint32Array) => number, thisArg?: any): Uint32Array;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Uint32Array) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Uint32Array) => U, initialValue: U): U;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an
+      * argument instead of an array value.
+      */
+    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Uint32Array) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Uint32Array) => U, initialValue: U): U;
+
+    /**
+      * Reverses the elements in an Array.
+      */
+    reverse(): Uint32Array;
+
+    /**
+      * Sets a value or an array of values.
+      * @param array A typed or untyped array of values to set.
+      * @param offset The index in the current array at which the values are to be written.
+      */
+    set(array: ArrayLike<number>, offset?: number): void;
+
+    /**
+      * Returns a section of an array.
+      * @param start The beginning of the specified portion of the array.
+      * @param end The end of the specified portion of the array.
+      */
+    slice(start?: number, end?: number): Uint32Array;
+
+    /**
+      * Determines whether the specified callback function returns true for any element of an array.
+      * @param callbackfn A function that accepts up to three arguments. The some method calls the
+      * callbackfn function for each element in array1 until the callbackfn returns true, or until
+      * the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    some(callbackfn: (value: number, index: number, array: Uint32Array) => boolean, thisArg?: any): boolean;
+
+    /**
+      * Sorts an array.
+      * @param compareFn The name of the function used to determine the order of the elements. If
+      * omitted, the elements are sorted in ascending, ASCII character order.
+      */
+    sort(compareFn?: (a: number, b: number) => number): this;
+
+    /**
+      * Gets a new Uint32Array view of the ArrayBuffer store for this array, referencing the elements
+      * at begin, inclusive, up to end, exclusive.
+      * @param begin The index of the beginning of the array.
+      * @param end The index of the end of the array.
+      */
+    subarray(begin: number, end?: number): Uint32Array;
+
+    /**
+      * Converts a number to a string by using the current locale.
+      */
+    toLocaleString(): string;
+
+    /**
+      * Returns a string representation of an array.
+      */
+    toString(): string;
+
+    [index: number]: number;
+}
+
+interface Uint32ArrayConstructor {
+    readonly prototype: Uint32Array;
+    new(length: number): Uint32Array;
+    new(array: ArrayLike<number>): Uint32Array;
+    new(buffer: ArrayBufferLike, byteOffset?: number, length?: number): Uint32Array;
+
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * Returns a new array from a set of elements.
+      * @param items A set of elements to include in the new array object.
+      */
+    of(...items: number[]): Uint32Array;
+
+    /**
+      * Creates an array from an array-like or iterable object.
+      * @param arrayLike An array-like or iterable object to convert to an array.
+      * @param mapfn A mapping function to call on every element of the array.
+      * @param thisArg Value of 'this' used to invoke the mapfn.
+      */
+    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Uint32Array;
+
+}
+declare const Uint32Array: Uint32ArrayConstructor;
+
+/**
+  * A typed array of 32-bit float values. The contents are initialized to 0. If the requested number
+  * of bytes could not be allocated an exception is raised.
+  */
+interface Float32Array {
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * The ArrayBuffer instance referenced by the array.
+      */
+    readonly buffer: ArrayBufferLike;
+
+    /**
+      * The length in bytes of the array.
+      */
+    readonly byteLength: number;
+
+    /**
+      * The offset in bytes of the array.
+      */
+    readonly byteOffset: number;
+
+    /**
+      * Returns the this object after copying a section of the array identified by start and end
+      * to the same array starting at position target
+      * @param target If target is negative, it is treated as length+target where length is the
+      * length of the array.
+      * @param start If start is negative, it is treated as length+start. If end is negative, it
+      * is treated as length+end.
+      * @param end If not specified, length of the this object is used as its default value.
+      */
+    copyWithin(target: number, start: number, end?: number): this;
+
+    /**
+      * Determines whether all the members of an array satisfy the specified test.
+      * @param callbackfn A function that accepts up to three arguments. The every method calls
+      * the callbackfn function for each element in array1 until the callbackfn returns false,
+      * or until the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    every(callbackfn: (value: number, index: number, array: Float32Array) => boolean, thisArg?: any): boolean;
+
+    /**
+        * Returns the this object after filling the section identified by start and end with value
+        * @param value value to fill array section with
+        * @param start index to start filling the array at. If start is negative, it is treated as
+        * length+start where length is the length of the array.
+        * @param end index to stop filling the array at. If end is negative, it is treated as
+        * length+end.
+        */
+    fill(value: number, start?: number, end?: number): this;
+
+    /**
+      * Returns the elements of an array that meet the condition specified in a callback function.
+      * @param callbackfn A function that accepts up to three arguments. The filter method calls
+      * the callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    filter(callbackfn: (value: number, index: number, array: Float32Array) => any, thisArg?: any): Float32Array;
+
+    /**
+      * Returns the value of the first element in the array where predicate is true, and undefined
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found, find
+      * immediately returns that element value. Otherwise, find returns undefined.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
+
+    /**
+      * Returns the index of the first element in the array where predicate is true, and -1
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found,
+      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
+
+    /**
+      * Performs the specified action for each element in an array.
+      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    forEach(callbackfn: (value: number, index: number, array: Float32Array) => void, thisArg?: any): void;
+
+    /**
+      * Returns the index of the first occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      *  search starts at index 0.
+      */
+    indexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * Adds all the elements of an array separated by the specified separator string.
+      * @param separator A string used to separate one element of an array from the next in the
+      * resulting String. If omitted, the array elements are separated with a comma.
+      */
+    join(separator?: string): string;
+
+    /**
+      * Returns the index of the last occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      * search starts at index 0.
+      */
+    lastIndexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * The length of the array.
+      */
+    readonly length: number;
+
+    /**
+      * Calls a defined callback function on each element of an array, and returns an array that
+      * contains the results.
+      * @param callbackfn A function that accepts up to three arguments. The map method calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    map(callbackfn: (this: void, value: number, index: number, array: Float32Array) => number, thisArg?: any): Float32Array;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Float32Array) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Float32Array) => U, initialValue: U): U;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an
+      * argument instead of an array value.
+      */
+    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Float32Array) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Float32Array) => U, initialValue: U): U;
+
+    /**
+      * Reverses the elements in an Array.
+      */
+    reverse(): Float32Array;
+
+    /**
+      * Sets a value or an array of values.
+      * @param array A typed or untyped array of values to set.
+      * @param offset The index in the current array at which the values are to be written.
+      */
+    set(array: ArrayLike<number>, offset?: number): void;
+
+    /**
+      * Returns a section of an array.
+      * @param start The beginning of the specified portion of the array.
+      * @param end The end of the specified portion of the array.
+      */
+    slice(start?: number, end?: number): Float32Array;
+
+    /**
+      * Determines whether the specified callback function returns true for any element of an array.
+      * @param callbackfn A function that accepts up to three arguments. The some method calls the
+      * callbackfn function for each element in array1 until the callbackfn returns true, or until
+      * the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    some(callbackfn: (value: number, index: number, array: Float32Array) => boolean, thisArg?: any): boolean;
+
+    /**
+      * Sorts an array.
+      * @param compareFn The name of the function used to determine the order of the elements. If
+      * omitted, the elements are sorted in ascending, ASCII character order.
+      */
+    sort(compareFn?: (a: number, b: number) => number): this;
+
+    /**
+      * Gets a new Float32Array view of the ArrayBuffer store for this array, referencing the elements
+      * at begin, inclusive, up to end, exclusive.
+      * @param begin The index of the beginning of the array.
+      * @param end The index of the end of the array.
+      */
+    subarray(begin: number, end?: number): Float32Array;
+
+    /**
+      * Converts a number to a string by using the current locale.
+      */
+    toLocaleString(): string;
+
+    /**
+      * Returns a string representation of an array.
+      */
+    toString(): string;
+
+    [index: number]: number;
+}
+
+interface Float32ArrayConstructor {
+    readonly prototype: Float32Array;
+    new(length: number): Float32Array;
+    new(array: ArrayLike<number>): Float32Array;
+    new(buffer: ArrayBufferLike, byteOffset?: number, length?: number): Float32Array;
+
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * Returns a new array from a set of elements.
+      * @param items A set of elements to include in the new array object.
+      */
+    of(...items: number[]): Float32Array;
+
+    /**
+      * Creates an array from an array-like or iterable object.
+      * @param arrayLike An array-like or iterable object to convert to an array.
+      * @param mapfn A mapping function to call on every element of the array.
+      * @param thisArg Value of 'this' used to invoke the mapfn.
+      */
+    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Float32Array;
+
+
+}
+declare const Float32Array: Float32ArrayConstructor;
+
+/**
+  * A typed array of 64-bit float values. The contents are initialized to 0. If the requested
+  * number of bytes could not be allocated an exception is raised.
+  */
+interface Float64Array {
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * The ArrayBuffer instance referenced by the array.
+      */
+    readonly buffer: ArrayBufferLike;
+
+    /**
+      * The length in bytes of the array.
+      */
+    readonly byteLength: number;
+
+    /**
+      * The offset in bytes of the array.
+      */
+    readonly byteOffset: number;
+
+    /**
+      * Returns the this object after copying a section of the array identified by start and end
+      * to the same array starting at position target
+      * @param target If target is negative, it is treated as length+target where length is the
+      * length of the array.
+      * @param start If start is negative, it is treated as length+start. If end is negative, it
+      * is treated as length+end.
+      * @param end If not specified, length of the this object is used as its default value.
+      */
+    copyWithin(target: number, start: number, end?: number): this;
+
+    /**
+      * Determines whether all the members of an array satisfy the specified test.
+      * @param callbackfn A function that accepts up to three arguments. The every method calls
+      * the callbackfn function for each element in array1 until the callbackfn returns false,
+      * or until the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    every(callbackfn: (value: number, index: number, array: Float64Array) => boolean, thisArg?: any): boolean;
+
+    /**
+        * Returns the this object after filling the section identified by start and end with value
+        * @param value value to fill array section with
+        * @param start index to start filling the array at. If start is negative, it is treated as
+        * length+start where length is the length of the array.
+        * @param end index to stop filling the array at. If end is negative, it is treated as
+        * length+end.
+        */
+    fill(value: number, start?: number, end?: number): this;
+
+    /**
+      * Returns the elements of an array that meet the condition specified in a callback function.
+      * @param callbackfn A function that accepts up to three arguments. The filter method calls
+      * the callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    filter(callbackfn: (value: number, index: number, array: Float64Array) => any, thisArg?: any): Float64Array;
+
+    /**
+      * Returns the value of the first element in the array where predicate is true, and undefined
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found, find
+      * immediately returns that element value. Otherwise, find returns undefined.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
+
+    /**
+      * Returns the index of the first element in the array where predicate is true, and -1
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found,
+      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
+
+    /**
+      * Performs the specified action for each element in an array.
+      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    forEach(callbackfn: (value: number, index: number, array: Float64Array) => void, thisArg?: any): void;
+
+    /**
+      * Returns the index of the first occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      *  search starts at index 0.
+      */
+    indexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * Adds all the elements of an array separated by the specified separator string.
+      * @param separator A string used to separate one element of an array from the next in the
+      * resulting String. If omitted, the array elements are separated with a comma.
+      */
+    join(separator?: string): string;
+
+    /**
+      * Returns the index of the last occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      * search starts at index 0.
+      */
+    lastIndexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * The length of the array.
+      */
+    readonly length: number;
+
+    /**
+      * Calls a defined callback function on each element of an array, and returns an array that
+      * contains the results.
+      * @param callbackfn A function that accepts up to three arguments. The map method calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    map(callbackfn: (this: void, value: number, index: number, array: Float64Array) => number, thisArg?: any): Float64Array;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Float64Array) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Float64Array) => U, initialValue: U): U;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an
+      * argument instead of an array value.
+      */
+    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Float64Array) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Float64Array) => U, initialValue: U): U;
+
+    /**
+      * Reverses the elements in an Array.
+      */
+    reverse(): Float64Array;
+
+    /**
+      * Sets a value or an array of values.
+      * @param array A typed or untyped array of values to set.
+      * @param offset The index in the current array at which the values are to be written.
+      */
+    set(array: ArrayLike<number>, offset?: number): void;
+
+    /**
+      * Returns a section of an array.
+      * @param start The beginning of the specified portion of the array.
+      * @param end The end of the specified portion of the array.
+      */
+    slice(start?: number, end?: number): Float64Array;
+
+    /**
+      * Determines whether the specified callback function returns true for any element of an array.
+      * @param callbackfn A function that accepts up to three arguments. The some method calls the
+      * callbackfn function for each element in array1 until the callbackfn returns true, or until
+      * the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    some(callbackfn: (value: number, index: number, array: Float64Array) => boolean, thisArg?: any): boolean;
+
+    /**
+      * Sorts an array.
+      * @param compareFn The name of the function used to determine the order of the elements. If
+      * omitted, the elements are sorted in ascending, ASCII character order.
+      */
+    sort(compareFn?: (a: number, b: number) => number): this;
+
+    /**
+      * Gets a new Float64Array view of the ArrayBuffer store for this array, referencing the elements
+      * at begin, inclusive, up to end, exclusive.
+      * @param begin The index of the beginning of the array.
+      * @param end The index of the end of the array.
+      */
+    subarray(begin: number, end?: number): Float64Array;
+
+    /**
+      * Converts a number to a string by using the current locale.
+      */
+    toLocaleString(): string;
+
+    /**
+      * Returns a string representation of an array.
+      */
+    toString(): string;
+
+    [index: number]: number;
+}
+
+interface Float64ArrayConstructor {
+    readonly prototype: Float64Array;
+    new(length: number): Float64Array;
+    new(array: ArrayLike<number>): Float64Array;
+    new(buffer: ArrayBufferLike, byteOffset?: number, length?: number): Float64Array;
+
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * Returns a new array from a set of elements.
+      * @param items A set of elements to include in the new array object.
+      */
+    of(...items: number[]): Float64Array;
+
+    /**
+      * Creates an array from an array-like or iterable object.
+      * @param arrayLike An array-like or iterable object to convert to an array.
+      * @param mapfn A mapping function to call on every element of the array.
+      * @param thisArg Value of 'this' used to invoke the mapfn.
+      */
+    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Float64Array;
+
+}
+declare const Float64Array: Float64ArrayConstructor;
+
+/////////////////////////////
+/// ECMAScript Internationalization API
+/////////////////////////////
+
+declare namespace Intl {
+    interface CollatorOptions {
+        usage?: string;
+        localeMatcher?: string;
+        numeric?: boolean;
+        caseFirst?: string;
+        sensitivity?: string;
+        ignorePunctuation?: boolean;
+    }
+
+    interface ResolvedCollatorOptions {
+        locale: string;
+        usage: string;
+        sensitivity: string;
+        ignorePunctuation: boolean;
+        collation: string;
+        caseFirst: string;
+        numeric: boolean;
+    }
+
+    interface Collator {
+        compare(x: string, y: string): number;
+        resolvedOptions(): ResolvedCollatorOptions;
+    }
+    var Collator: {
+        new(locales?: string | string[], options?: CollatorOptions): Collator;
+        (locales?: string | string[], options?: CollatorOptions): Collator;
+        supportedLocalesOf(locales: string | string[], options?: CollatorOptions): string[];
+    };
+
+    interface NumberFormatOptions {
+        localeMatcher?: string;
+        style?: string;
+        currency?: string;
+        currencyDisplay?: string;
+        useGrouping?: boolean;
+        minimumIntegerDigits?: number;
+        minimumFractionDigits?: number;
+        maximumFractionDigits?: number;
+        minimumSignificantDigits?: number;
+        maximumSignificantDigits?: number;
+    }
+
+    interface ResolvedNumberFormatOptions {
+        locale: string;
+        numberingSystem: string;
+        style: string;
+        currency?: string;
+        currencyDisplay?: string;
+        minimumIntegerDigits: number;
+        minimumFractionDigits: number;
+        maximumFractionDigits: number;
+        minimumSignificantDigits?: number;
+        maximumSignificantDigits?: number;
+        useGrouping: boolean;
+    }
+
+    interface NumberFormat {
+        format(value: number): string;
+        resolvedOptions(): ResolvedNumberFormatOptions;
+    }
+    var NumberFormat: {
+        new(locales?: string | string[], options?: NumberFormatOptions): NumberFormat;
+        (locales?: string | string[], options?: NumberFormatOptions): NumberFormat;
+        supportedLocalesOf(locales: string | string[], options?: NumberFormatOptions): string[];
+    };
+
+    interface DateTimeFormatOptions {
+        localeMatcher?: string;
+        weekday?: string;
+        era?: string;
+        year?: string;
+        month?: string;
+        day?: string;
+        hour?: string;
+        minute?: string;
+        second?: string;
+        timeZoneName?: string;
+        formatMatcher?: string;
+        hour12?: boolean;
+        timeZone?: string;
+    }
+
+    interface ResolvedDateTimeFormatOptions {
+        locale: string;
+        calendar: string;
+        numberingSystem: string;
+        timeZone: string;
+        hour12?: boolean;
+        weekday?: string;
+        era?: string;
+        year?: string;
+        month?: string;
+        day?: string;
+        hour?: string;
+        minute?: string;
+        second?: string;
+        timeZoneName?: string;
+    }
+
+    interface DateTimeFormat {
+        format(date?: Date | number): string;
+        resolvedOptions(): ResolvedDateTimeFormatOptions;
+    }
+    var DateTimeFormat: {
+        new(locales?: string | string[], options?: DateTimeFormatOptions): DateTimeFormat;
+        (locales?: string | string[], options?: DateTimeFormatOptions): DateTimeFormat;
+        supportedLocalesOf(locales: string | string[], options?: DateTimeFormatOptions): string[];
+    };
+}
+
+interface String {
+    /**
+      * Determines whether two strings are equivalent in the current or specified locale.
+      * @param that String to compare to target string
+      * @param locales A locale string or array of locale strings that contain one or more language or locale tags. If you include more than one locale string, list them in descending order of priority so that the first entry is the preferred locale. If you omit this parameter, the default locale of the JavaScript runtime is used. This parameter must conform to BCP 47 standards; see the Intl.Collator object for details.
+      * @param options An object that contains one or more properties that specify comparison options. see the Intl.Collator object for details.
+      */
+    localeCompare(that: string, locales?: string | string[], options?: Intl.CollatorOptions): number;
+}
+
+interface Number {
+    /**
+      * Converts a number to a string by using the current or specified locale.
+      * @param locales A locale string or array of locale strings that contain one or more language or locale tags. If you include more than one locale string, list them in descending order of priority so that the first entry is the preferred locale. If you omit this parameter, the default locale of the JavaScript runtime is used.
+      * @param options An object that contains one or more properties that specify comparison options.
+      */
+    toLocaleString(locales?: string | string[], options?: Intl.NumberFormatOptions): string;
+}
+
+interface Date {
+    /**
+      * Converts a date and time to a string by using the current or specified locale.
+      * @param locales A locale string or array of locale strings that contain one or more language or locale tags. If you include more than one locale string, list them in descending order of priority so that the first entry is the preferred locale. If you omit this parameter, the default locale of the JavaScript runtime is used.
+      * @param options An object that contains one or more properties that specify comparison options.
+      */
+    toLocaleString(locales?: string | string[], options?: Intl.DateTimeFormatOptions): string;
+    /**
+      * Converts a date to a string by using the current or specified locale.
+      * @param locales A locale string or array of locale strings that contain one or more language or locale tags. If you include more than one locale string, list them in descending order of priority so that the first entry is the preferred locale. If you omit this parameter, the default locale of the JavaScript runtime is used.
+      * @param options An object that contains one or more properties that specify comparison options.
+      */
+    toLocaleDateString(locales?: string | string[], options?: Intl.DateTimeFormatOptions): string;
+
+    /**
+      * Converts a time to a string by using the current or specified locale.
+      * @param locales A locale string or array of locale strings that contain one or more language or locale tags. If you include more than one locale string, list them in descending order of priority so that the first entry is the preferred locale. If you omit this parameter, the default locale of the JavaScript runtime is used.
+      * @param options An object that contains one or more properties that specify comparison options.
+      */
+    toLocaleTimeString(locales?: string | string[], options?: Intl.DateTimeFormatOptions): string;
+}
+
+
+
+/////////////////////////////
+/// DOM APIs
+/////////////////////////////
+
+interface Account {
+    displayName?: string;
+    id?: string;
+    imageURL?: string;
+    name?: string;
+    rpDisplayName?: string;
+}
+
+interface Algorithm {
+    name: string;
+}
+
+interface AnimationEventInit extends EventInit {
+    animationName?: string;
+    elapsedTime?: number;
+}
+
+interface AssertionOptions {
+    allowList?: ScopedCredentialDescriptor[];
+    extensions?: WebAuthnExtensions;
+    rpId?: USVString;
+    timeoutSeconds?: number;
+}
+
+interface CacheQueryOptions {
+    cacheName?: string;
+    ignoreMethod?: boolean;
+    ignoreSearch?: boolean;
+    ignoreVary?: boolean;
+}
+
+interface ClientData {
+    challenge?: string;
+    extensions?: WebAuthnExtensions;
+    hashAlg?: string | Algorithm;
+    origin?: string;
+    rpId?: string;
+    tokenBinding?: string;
+}
+
+interface CloseEventInit extends EventInit {
+    code?: number;
+    reason?: string;
+    wasClean?: boolean;
+}
+
+interface CompositionEventInit extends UIEventInit {
+    data?: string;
+}
+
+interface ConfirmSiteSpecificExceptionsInformation extends ExceptionInformation {
+    arrayOfDomainStrings?: string[];
+}
+
+interface ConstrainBooleanParameters {
+    exact?: boolean;
+    ideal?: boolean;
+}
+
+interface ConstrainDOMStringParameters {
+    exact?: string | string[];
+    ideal?: string | string[];
+}
+
+interface ConstrainDoubleRange extends DoubleRange {
+    exact?: number;
+    ideal?: number;
+}
+
+interface ConstrainLongRange extends LongRange {
+    exact?: number;
+    ideal?: number;
+}
+
+interface ConstrainVideoFacingModeParameters {
+    exact?: VideoFacingModeEnum | VideoFacingModeEnum[];
+    ideal?: VideoFacingModeEnum | VideoFacingModeEnum[];
+}
+
+interface CustomEventInit extends EventInit {
+    detail?: any;
+}
+
+interface DeviceAccelerationDict {
+    x?: number;
+    y?: number;
+    z?: number;
+}
+
+interface DeviceLightEventInit extends EventInit {
+    value?: number;
+}
+
+interface DeviceMotionEventInit extends EventInit {
+    acceleration?: DeviceAccelerationDict;
+    accelerationIncludingGravity?: DeviceAccelerationDict;
+    interval?: number;
+    rotationRate?: DeviceRotationRateDict;
+}
+
+interface DeviceOrientationEventInit extends EventInit {
+    absolute?: boolean;
+    alpha?: number;
+    beta?: number;
+    gamma?: number;
+}
+
+interface DeviceRotationRateDict {
+    alpha?: number;
+    beta?: number;
+    gamma?: number;
+}
+
+interface DOMRectInit {
+    height?: any;
+    width?: any;
+    x?: any;
+    y?: any;
+}
+
+interface DoubleRange {
+    max?: number;
+    min?: number;
+}
+
+interface ErrorEventInit extends EventInit {
+    colno?: number;
+    error?: any;
+    filename?: string;
+    lineno?: number;
+    message?: string;
+}
+
+interface EventInit {
+    scoped?: boolean;
+    bubbles?: boolean;
+    cancelable?: boolean;
+}
+
+interface EventModifierInit extends UIEventInit {
+    altKey?: boolean;
+    ctrlKey?: boolean;
+    metaKey?: boolean;
+    modifierAltGraph?: boolean;
+    modifierCapsLock?: boolean;
+    modifierFn?: boolean;
+    modifierFnLock?: boolean;
+    modifierHyper?: boolean;
+    modifierNumLock?: boolean;
+    modifierOS?: boolean;
+    modifierScrollLock?: boolean;
+    modifierSuper?: boolean;
+    modifierSymbol?: boolean;
+    modifierSymbolLock?: boolean;
+    shiftKey?: boolean;
+}
+
+interface ExceptionInformation {
+    domain?: string;
+}
+
+interface FocusEventInit extends UIEventInit {
+    relatedTarget?: EventTarget;
+}
+
+interface FocusNavigationEventInit extends EventInit {
+    navigationReason?: string;
+    originHeight?: number;
+    originLeft?: number;
+    originTop?: number;
+    originWidth?: number;
+}
+
+interface FocusNavigationOrigin {
+    originHeight?: number;
+    originLeft?: number;
+    originTop?: number;
+    originWidth?: number;
+}
+
+interface GamepadEventInit extends EventInit {
+    gamepad?: Gamepad;
+}
+
+interface GetNotificationOptions {
+    tag?: string;
+}
+
+interface HashChangeEventInit extends EventInit {
+    newURL?: string;
+    oldURL?: string;
+}
+
+interface IDBIndexParameters {
+    multiEntry?: boolean;
+    unique?: boolean;
+}
+
+interface IDBObjectStoreParameters {
+    autoIncrement?: boolean;
+    keyPath?: IDBKeyPath;
+}
+
+interface IntersectionObserverEntryInit {
+    boundingClientRect?: DOMRectInit;
+    intersectionRect?: DOMRectInit;
+    rootBounds?: DOMRectInit;
+    target?: Element;
+    time?: number;
+}
+
+interface IntersectionObserverInit {
+    root?: Element;
+    rootMargin?: string;
+    threshold?: number | number[];
+}
+
+interface KeyAlgorithm {
+    name?: string;
+}
+
+interface KeyboardEventInit extends EventModifierInit {
+    code?: string;
+    key?: string;
+    location?: number;
+    repeat?: boolean;
+}
+
+interface LongRange {
+    max?: number;
+    min?: number;
+}
+
+interface MediaEncryptedEventInit extends EventInit {
+    initData?: ArrayBuffer;
+    initDataType?: string;
+}
+
+interface MediaKeyMessageEventInit extends EventInit {
+    message?: ArrayBuffer;
+    messageType?: MediaKeyMessageType;
+}
+
+interface MediaKeySystemConfiguration {
+    audioCapabilities?: MediaKeySystemMediaCapability[];
+    distinctiveIdentifier?: MediaKeysRequirement;
+    initDataTypes?: string[];
+    persistentState?: MediaKeysRequirement;
+    videoCapabilities?: MediaKeySystemMediaCapability[];
+}
+
+interface MediaKeySystemMediaCapability {
+    contentType?: string;
+    robustness?: string;
+}
+
+interface MediaStreamConstraints {
+    audio?: boolean | MediaTrackConstraints;
+    video?: boolean | MediaTrackConstraints;
+}
+
+interface MediaStreamErrorEventInit extends EventInit {
+    error?: MediaStreamError;
+}
+
+interface MediaStreamEventInit extends EventInit {
+    stream?: MediaStream;
+}
+
+interface MediaStreamTrackEventInit extends EventInit {
+    track?: MediaStreamTrack;
+}
+
+interface MediaTrackCapabilities {
+    aspectRatio?: number | DoubleRange;
+    deviceId?: string;
+    echoCancellation?: boolean[];
+    facingMode?: string;
+    frameRate?: number | DoubleRange;
+    groupId?: string;
+    height?: number | LongRange;
+    sampleRate?: number | LongRange;
+    sampleSize?: number | LongRange;
+    volume?: number | DoubleRange;
+    width?: number | LongRange;
+}
+
+interface MediaTrackConstraints extends MediaTrackConstraintSet {
+    advanced?: MediaTrackConstraintSet[];
+}
+
+interface MediaTrackConstraintSet {
+    aspectRatio?: number | ConstrainDoubleRange;
+    deviceId?: string | string[] | ConstrainDOMStringParameters;
+    echoCancelation?: boolean | ConstrainBooleanParameters;
+    facingMode?: string | string[] | ConstrainDOMStringParameters;
+    frameRate?: number | ConstrainDoubleRange;
+    groupId?: string | string[] | ConstrainDOMStringParameters;
+    height?: number | ConstrainLongRange;
+    sampleRate?: number | ConstrainLongRange;
+    sampleSize?: number | ConstrainLongRange;
+    volume?: number | ConstrainDoubleRange;
+    width?: number | ConstrainLongRange;
+}
+
+interface MediaTrackSettings {
+    aspectRatio?: number;
+    deviceId?: string;
+    echoCancellation?: boolean;
+    facingMode?: string;
+    frameRate?: number;
+    groupId?: string;
+    height?: number;
+    sampleRate?: number;
+    sampleSize?: number;
+    volume?: number;
+    width?: number;
+}
+
+interface MediaTrackSupportedConstraints {
+    aspectRatio?: boolean;
+    deviceId?: boolean;
+    echoCancellation?: boolean;
+    facingMode?: boolean;
+    frameRate?: boolean;
+    groupId?: boolean;
+    height?: boolean;
+    sampleRate?: boolean;
+    sampleSize?: boolean;
+    volume?: boolean;
+    width?: boolean;
+}
+
+interface MessageEventInit extends EventInit {
+    lastEventId?: string;
+    channel?: string;
+    data?: any;
+    origin?: string;
+    ports?: MessagePort[];
+    source?: Window;
+}
+
+interface MouseEventInit extends EventModifierInit {
+    button?: number;
+    buttons?: number;
+    clientX?: number;
+    clientY?: number;
+    relatedTarget?: EventTarget;
+    screenX?: number;
+    screenY?: number;
+}
+
+interface MSAccountInfo {
+    accountImageUri?: string;
+    accountName?: string;
+    rpDisplayName?: string;
+    userDisplayName?: string;
+    userId?: string;
+}
+
+interface MSAudioLocalClientEvent extends MSLocalClientEventBase {
+    cpuInsufficientEventRatio?: number;
+    deviceCaptureNotFunctioningEventRatio?: number;
+    deviceClippingEventRatio?: number;
+    deviceEchoEventRatio?: number;
+    deviceGlitchesEventRatio?: number;
+    deviceHalfDuplexAECEventRatio?: number;
+    deviceHowlingEventCount?: number;
+    deviceLowSNREventRatio?: number;
+    deviceLowSpeechLevelEventRatio?: number;
+    deviceMultipleEndpointsEventCount?: number;
+    deviceNearEndToEchoRatioEventRatio?: number;
+    deviceRenderMuteEventRatio?: number;
+    deviceRenderNotFunctioningEventRatio?: number;
+    deviceRenderZeroVolumeEventRatio?: number;
+    networkDelayEventRatio?: number;
+    networkSendQualityEventRatio?: number;
+}
+
+interface MSAudioRecvPayload extends MSPayloadBase {
+    burstLossLength1?: number;
+    burstLossLength2?: number;
+    burstLossLength3?: number;
+    burstLossLength4?: number;
+    burstLossLength5?: number;
+    burstLossLength6?: number;
+    burstLossLength7?: number;
+    burstLossLength8OrHigher?: number;
+    fecRecvDistance1?: number;
+    fecRecvDistance2?: number;
+    fecRecvDistance3?: number;
+    packetReorderDepthAvg?: number;
+    packetReorderDepthMax?: number;
+    packetReorderRatio?: number;
+    ratioCompressedSamplesAvg?: number;
+    ratioConcealedSamplesAvg?: number;
+    ratioStretchedSamplesAvg?: number;
+    samplingRate?: number;
+    signal?: MSAudioRecvSignal;
+}
+
+interface MSAudioRecvSignal {
+    initialSignalLevelRMS?: number;
+    recvNoiseLevelCh1?: number;
+    recvSignalLevelCh1?: number;
+    renderLoopbackSignalLevel?: number;
+    renderNoiseLevel?: number;
+    renderSignalLevel?: number;
+}
+
+interface MSAudioSendPayload extends MSPayloadBase {
+    audioFECUsed?: boolean;
+    samplingRate?: number;
+    sendMutePercent?: number;
+    signal?: MSAudioSendSignal;
+}
+
+interface MSAudioSendSignal {
+    noiseLevel?: number;
+    sendNoiseLevelCh1?: number;
+    sendSignalLevelCh1?: number;
+}
+
+interface MSConnectivity {
+    iceType?: MSIceType;
+    iceWarningFlags?: MSIceWarningFlags;
+    relayAddress?: MSRelayAddress;
+}
+
+interface MSCredentialFilter {
+    accept?: MSCredentialSpec[];
+}
+
+interface MSCredentialParameters {
+    type?: MSCredentialType;
+}
+
+interface MSCredentialSpec {
+    id?: string;
+    type?: MSCredentialType;
+}
+
+interface MSDelay {
+    roundTrip?: number;
+    roundTripMax?: number;
+}
+
+interface MSDescription extends RTCStats {
+    connectivity?: MSConnectivity;
+    deviceDevName?: string;
+    localAddr?: MSIPAddressInfo;
+    networkconnectivity?: MSNetworkConnectivityInfo;
+    reflexiveLocalIPAddr?: MSIPAddressInfo;
+    remoteAddr?: MSIPAddressInfo;
+    transport?: RTCIceProtocol;
+}
+
+interface MSFIDOCredentialParameters extends MSCredentialParameters {
+    algorithm?: string | Algorithm;
+    authenticators?: AAGUID[];
+}
+
+interface MSIceWarningFlags {
+    allocationMessageIntegrityFailed?: boolean;
+    alternateServerReceived?: boolean;
+    connCheckMessageIntegrityFailed?: boolean;
+    connCheckOtherError?: boolean;
+    fipsAllocationFailure?: boolean;
+    multipleRelayServersAttempted?: boolean;
+    noRelayServersConfigured?: boolean;
+    portRangeExhausted?: boolean;
+    pseudoTLSFailure?: boolean;
+    tcpNatConnectivityFailed?: boolean;
+    tcpRelayConnectivityFailed?: boolean;
+    turnAuthUnknownUsernameError?: boolean;
+    turnTcpAllocateFailed?: boolean;
+    turnTcpSendFailed?: boolean;
+    turnTcpTimedOut?: boolean;
+    turnTurnTcpConnectivityFailed?: boolean;
+    turnUdpAllocateFailed?: boolean;
+    turnUdpSendFailed?: boolean;
+    udpLocalConnectivityFailed?: boolean;
+    udpNatConnectivityFailed?: boolean;
+    udpRelayConnectivityFailed?: boolean;
+    useCandidateChecksFailed?: boolean;
+}
+
+interface MSIPAddressInfo {
+    ipAddr?: string;
+    manufacturerMacAddrMask?: string;
+    port?: number;
+}
+
+interface MSJitter {
+    interArrival?: number;
+    interArrivalMax?: number;
+    interArrivalSD?: number;
+}
+
+interface MSLocalClientEventBase extends RTCStats {
+    networkBandwidthLowEventRatio?: number;
+    networkReceiveQualityEventRatio?: number;
+}
+
+interface MSNetwork extends RTCStats {
+    delay?: MSDelay;
+    jitter?: MSJitter;
+    packetLoss?: MSPacketLoss;
+    utilization?: MSUtilization;
+}
+
+interface MSNetworkConnectivityInfo {
+    linkspeed?: number;
+    networkConnectionDetails?: string;
+    vpn?: boolean;
+}
+
+interface MSNetworkInterfaceType {
+    interfaceTypeEthernet?: boolean;
+    interfaceTypePPP?: boolean;
+    interfaceTypeTunnel?: boolean;
+    interfaceTypeWireless?: boolean;
+    interfaceTypeWWAN?: boolean;
+}
+
+interface MSOutboundNetwork extends MSNetwork {
+    appliedBandwidthLimit?: number;
+}
+
+interface MSPacketLoss {
+    lossRate?: number;
+    lossRateMax?: number;
+}
+
+interface MSPayloadBase extends RTCStats {
+    payloadDescription?: string;
+}
+
+interface MSPortRange {
+    max?: number;
+    min?: number;
+}
+
+interface MSRelayAddress {
+    port?: number;
+    relayAddress?: string;
+}
+
+interface MSSignatureParameters {
+    userPrompt?: string;
+}
+
+interface MSTransportDiagnosticsStats extends RTCStats {
+    allocationTimeInMs?: number;
+    baseAddress?: string;
+    baseInterface?: MSNetworkInterfaceType;
+    iceRole?: RTCIceRole;
+    iceWarningFlags?: MSIceWarningFlags;
+    interfaces?: MSNetworkInterfaceType;
+    localAddress?: string;
+    localAddrType?: MSIceAddrType;
+    localInterface?: MSNetworkInterfaceType;
+    localMR?: string;
+    localMRTCPPort?: number;
+    localSite?: string;
+    msRtcEngineVersion?: string;
+    networkName?: string;
+    numConsentReqReceived?: number;
+    numConsentReqSent?: number;
+    numConsentRespReceived?: number;
+    numConsentRespSent?: number;
+    portRangeMax?: number;
+    portRangeMin?: number;
+    protocol?: RTCIceProtocol;
+    remoteAddress?: string;
+    remoteAddrType?: MSIceAddrType;
+    remoteMR?: string;
+    remoteMRTCPPort?: number;
+    remoteSite?: string;
+    rtpRtcpMux?: boolean;
+    stunVer?: number;
+}
+
+interface MSUtilization {
+    bandwidthEstimation?: number;
+    bandwidthEstimationAvg?: number;
+    bandwidthEstimationMax?: number;
+    bandwidthEstimationMin?: number;
+    bandwidthEstimationStdDev?: number;
+    packets?: number;
+}
+
+interface MSVideoPayload extends MSPayloadBase {
+    durationSeconds?: number;
+    resolution?: string;
+    videoBitRateAvg?: number;
+    videoBitRateMax?: number;
+    videoFrameRateAvg?: number;
+    videoPacketLossRate?: number;
+}
+
+interface MSVideoRecvPayload extends MSVideoPayload {
+    lowBitRateCallPercent?: number;
+    lowFrameRateCallPercent?: number;
+    recvBitRateAverage?: number;
+    recvBitRateMaximum?: number;
+    recvCodecType?: string;
+    recvFpsHarmonicAverage?: number;
+    recvFrameRateAverage?: number;
+    recvNumResSwitches?: number;
+    recvReorderBufferMaxSuccessfullyOrderedExtent?: number;
+    recvReorderBufferMaxSuccessfullyOrderedLateTime?: number;
+    recvReorderBufferPacketsDroppedDueToBufferExhaustion?: number;
+    recvReorderBufferPacketsDroppedDueToTimeout?: number;
+    recvReorderBufferReorderedPackets?: number;
+    recvResolutionHeight?: number;
+    recvResolutionWidth?: number;
+    recvVideoStreamsMax?: number;
+    recvVideoStreamsMin?: number;
+    recvVideoStreamsMode?: number;
+    reorderBufferTotalPackets?: number;
+    videoFrameLossRate?: number;
+    videoPostFECPLR?: number;
+    videoResolutions?: MSVideoResolutionDistribution;
+}
+
+interface MSVideoResolutionDistribution {
+    cifQuality?: number;
+    h1080Quality?: number;
+    h1440Quality?: number;
+    h2160Quality?: number;
+    h720Quality?: number;
+    vgaQuality?: number;
+}
+
+interface MSVideoSendPayload extends MSVideoPayload {
+    sendBitRateAverage?: number;
+    sendBitRateMaximum?: number;
+    sendFrameRateAverage?: number;
+    sendResolutionHeight?: number;
+    sendResolutionWidth?: number;
+    sendVideoStreamsMax?: number;
+}
+
+interface MsZoomToOptions {
+    animate?: string;
+    contentX?: number;
+    contentY?: number;
+    scaleFactor?: number;
+    viewportX?: string;
+    viewportY?: string;
+}
+
+interface MutationObserverInit {
+    attributeFilter?: string[];
+    attributeOldValue?: boolean;
+    attributes?: boolean;
+    characterData?: boolean;
+    characterDataOldValue?: boolean;
+    childList?: boolean;
+    subtree?: boolean;
+}
+
+interface NotificationOptions {
+    body?: string;
+    dir?: NotificationDirection;
+    icon?: string;
+    lang?: string;
+    tag?: string;
+}
+
+interface ObjectURLOptions {
+    oneTimeOnly?: boolean;
+}
+
+interface PaymentCurrencyAmount {
+    currency?: string;
+    currencySystem?: string;
+    value?: string;
+}
+
+interface PaymentDetails {
+    displayItems?: PaymentItem[];
+    error?: string;
+    modifiers?: PaymentDetailsModifier[];
+    shippingOptions?: PaymentShippingOption[];
+    total?: PaymentItem;
+}
+
+interface PaymentDetailsModifier {
+    additionalDisplayItems?: PaymentItem[];
+    data?: any;
+    supportedMethods?: string[];
+    total?: PaymentItem;
+}
+
+interface PaymentItem {
+    amount?: PaymentCurrencyAmount;
+    label?: string;
+    pending?: boolean;
+}
+
+interface PaymentMethodData {
+    data?: any;
+    supportedMethods?: string[];
+}
+
+interface PaymentOptions {
+    requestPayerEmail?: boolean;
+    requestPayerName?: boolean;
+    requestPayerPhone?: boolean;
+    requestShipping?: boolean;
+    shippingType?: string;
+}
+
+interface PaymentRequestUpdateEventInit extends EventInit {
+}
+
+interface PaymentShippingOption {
+    amount?: PaymentCurrencyAmount;
+    id?: string;
+    label?: string;
+    selected?: boolean;
+}
+
+interface PeriodicWaveConstraints {
+    disableNormalization?: boolean;
+}
+
+interface PointerEventInit extends MouseEventInit {
+    height?: number;
+    isPrimary?: boolean;
+    pointerId?: number;
+    pointerType?: string;
+    pressure?: number;
+    tiltX?: number;
+    tiltY?: number;
+    width?: number;
+}
+
+interface PopStateEventInit extends EventInit {
+    state?: any;
+}
+
+interface PositionOptions {
+    enableHighAccuracy?: boolean;
+    maximumAge?: number;
+    timeout?: number;
+}
+
+interface ProgressEventInit extends EventInit {
+    lengthComputable?: boolean;
+    loaded?: number;
+    total?: number;
+}
+
+interface PushSubscriptionOptionsInit {
+    applicationServerKey?: any;
+    userVisibleOnly?: boolean;
+}
+
+interface RegistrationOptions {
+    scope?: string;
+}
+
+interface RequestInit {
+    body?: any;
+    cache?: RequestCache;
+    credentials?: RequestCredentials;
+    headers?: any;
+    integrity?: string;
+    keepalive?: boolean;
+    method?: string;
+    mode?: RequestMode;
+    redirect?: RequestRedirect;
+    referrer?: string;
+    referrerPolicy?: ReferrerPolicy;
+    window?: any;
+}
+
+interface ResponseInit {
+    headers?: any;
+    status?: number;
+    statusText?: string;
+}
+
+interface RTCConfiguration {
+    bundlePolicy?: RTCBundlePolicy;
+    iceServers?: RTCIceServer[];
+    iceTransportPolicy?: RTCIceTransportPolicy;
+    peerIdentity?: string;
+}
+
+interface RTCDtlsFingerprint {
+    algorithm?: string;
+    value?: string;
+}
+
+interface RTCDtlsParameters {
+    fingerprints?: RTCDtlsFingerprint[];
+    role?: RTCDtlsRole;
+}
+
+interface RTCDTMFToneChangeEventInit extends EventInit {
+    tone?: string;
+}
+
+interface RTCIceCandidateAttributes extends RTCStats {
+    addressSourceUrl?: string;
+    candidateType?: RTCStatsIceCandidateType;
+    ipAddress?: string;
+    portNumber?: number;
+    priority?: number;
+    transport?: string;
+}
+
+interface RTCIceCandidateComplete {
+}
+
+interface RTCIceCandidateDictionary {
+    foundation?: string;
+    ip?: string;
+    msMTurnSessionId?: string;
+    port?: number;
+    priority?: number;
+    protocol?: RTCIceProtocol;
+    relatedAddress?: string;
+    relatedPort?: number;
+    tcpType?: RTCIceTcpCandidateType;
+    type?: RTCIceCandidateType;
+}
+
+interface RTCIceCandidateInit {
+    candidate?: string;
+    sdpMid?: string;
+    sdpMLineIndex?: number;
+}
+
+interface RTCIceCandidatePair {
+    local?: RTCIceCandidateDictionary;
+    remote?: RTCIceCandidateDictionary;
+}
+
+interface RTCIceCandidatePairStats extends RTCStats {
+    availableIncomingBitrate?: number;
+    availableOutgoingBitrate?: number;
+    bytesReceived?: number;
+    bytesSent?: number;
+    localCandidateId?: string;
+    nominated?: boolean;
+    priority?: number;
+    readable?: boolean;
+    remoteCandidateId?: string;
+    roundTripTime?: number;
+    state?: RTCStatsIceCandidatePairState;
+    transportId?: string;
+    writable?: boolean;
+}
+
+interface RTCIceGatherOptions {
+    gatherPolicy?: RTCIceGatherPolicy;
+    iceservers?: RTCIceServer[];
+    portRange?: MSPortRange;
+}
+
+interface RTCIceParameters {
+    iceLite?: boolean;
+    password?: string;
+    usernameFragment?: string;
+}
+
+interface RTCIceServer {
+    credential?: string;
+    urls?: any;
+    username?: string;
+}
+
+interface RTCInboundRTPStreamStats extends RTCRTPStreamStats {
+    bytesReceived?: number;
+    fractionLost?: number;
+    jitter?: number;
+    packetsLost?: number;
+    packetsReceived?: number;
+}
+
+interface RTCMediaStreamTrackStats extends RTCStats {
+    audioLevel?: number;
+    echoReturnLoss?: number;
+    echoReturnLossEnhancement?: number;
+    frameHeight?: number;
+    framesCorrupted?: number;
+    framesDecoded?: number;
+    framesDropped?: number;
+    framesPerSecond?: number;
+    framesReceived?: number;
+    framesSent?: number;
+    frameWidth?: number;
+    remoteSource?: boolean;
+    ssrcIds?: string[];
+    trackIdentifier?: string;
+}
+
+interface RTCOfferOptions {
+    iceRestart?: boolean;
+    offerToReceiveAudio?: number;
+    offerToReceiveVideo?: number;
+    voiceActivityDetection?: boolean;
+}
+
+interface RTCOutboundRTPStreamStats extends RTCRTPStreamStats {
+    bytesSent?: number;
+    packetsSent?: number;
+    roundTripTime?: number;
+    targetBitrate?: number;
+}
+
+interface RTCPeerConnectionIceEventInit extends EventInit {
+    candidate?: RTCIceCandidate;
+}
+
+interface RTCRtcpFeedback {
+    parameter?: string;
+    type?: string;
+}
+
+interface RTCRtcpParameters {
+    cname?: string;
+    mux?: boolean;
+    reducedSize?: boolean;
+    ssrc?: number;
+}
+
+interface RTCRtpCapabilities {
+    codecs?: RTCRtpCodecCapability[];
+    fecMechanisms?: string[];
+    headerExtensions?: RTCRtpHeaderExtension[];
+}
+
+interface RTCRtpCodecCapability {
+    clockRate?: number;
+    kind?: string;
+    maxptime?: number;
+    maxSpatialLayers?: number;
+    maxTemporalLayers?: number;
+    name?: string;
+    numChannels?: number;
+    options?: any;
+    parameters?: any;
+    preferredPayloadType?: number;
+    ptime?: number;
+    rtcpFeedback?: RTCRtcpFeedback[];
+    svcMultiStreamSupport?: boolean;
+}
+
+interface RTCRtpCodecParameters {
+    clockRate?: number;
+    maxptime?: number;
+    name?: string;
+    numChannels?: number;
+    parameters?: any;
+    payloadType?: any;
+    ptime?: number;
+    rtcpFeedback?: RTCRtcpFeedback[];
+}
+
+interface RTCRtpContributingSource {
+    audioLevel?: number;
+    csrc?: number;
+    timestamp?: number;
+}
+
+interface RTCRtpEncodingParameters {
+    active?: boolean;
+    codecPayloadType?: number;
+    dependencyEncodingIds?: string[];
+    encodingId?: string;
+    fec?: RTCRtpFecParameters;
+    framerateScale?: number;
+    maxBitrate?: number;
+    maxFramerate?: number;
+    minQuality?: number;
+    priority?: number;
+    resolutionScale?: number;
+    rtx?: RTCRtpRtxParameters;
+    ssrc?: number;
+    ssrcRange?: RTCSsrcRange;
+}
+
+interface RTCRtpFecParameters {
+    mechanism?: string;
+    ssrc?: number;
+}
+
+interface RTCRtpHeaderExtension {
+    kind?: string;
+    preferredEncrypt?: boolean;
+    preferredId?: number;
+    uri?: string;
+}
+
+interface RTCRtpHeaderExtensionParameters {
+    encrypt?: boolean;
+    id?: number;
+    uri?: string;
+}
+
+interface RTCRtpParameters {
+    codecs?: RTCRtpCodecParameters[];
+    degradationPreference?: RTCDegradationPreference;
+    encodings?: RTCRtpEncodingParameters[];
+    headerExtensions?: RTCRtpHeaderExtensionParameters[];
+    muxId?: string;
+    rtcp?: RTCRtcpParameters;
+}
+
+interface RTCRtpRtxParameters {
+    ssrc?: number;
+}
+
+interface RTCRTPStreamStats extends RTCStats {
+    associateStatsId?: string;
+    codecId?: string;
+    firCount?: number;
+    isRemote?: boolean;
+    mediaTrackId?: string;
+    nackCount?: number;
+    pliCount?: number;
+    sliCount?: number;
+    ssrc?: string;
+    transportId?: string;
+}
+
+interface RTCRtpUnhandled {
+    muxId?: string;
+    payloadType?: number;
+    ssrc?: number;
+}
+
+interface RTCSessionDescriptionInit {
+    sdp?: string;
+    type?: RTCSdpType;
+}
+
+interface RTCSrtpKeyParam {
+    keyMethod?: string;
+    keySalt?: string;
+    lifetime?: string;
+    mkiLength?: number;
+    mkiValue?: number;
+}
+
+interface RTCSrtpSdesParameters {
+    cryptoSuite?: string;
+    keyParams?: RTCSrtpKeyParam[];
+    sessionParams?: string[];
+    tag?: number;
+}
+
+interface RTCSsrcRange {
+    max?: number;
+    min?: number;
+}
+
+interface RTCStats {
+    id?: string;
+    msType?: MSStatsType;
+    timestamp?: number;
+    type?: RTCStatsType;
+}
+
+interface RTCStatsReport {
+}
+
+interface RTCTransportStats extends RTCStats {
+    activeConnection?: boolean;
+    bytesReceived?: number;
+    bytesSent?: number;
+    localCertificateId?: string;
+    remoteCertificateId?: string;
+    rtcpTransportStatsId?: string;
+    selectedCandidatePairId?: string;
+}
+
+interface ScopedCredentialDescriptor {
+    id?: any;
+    transports?: Transport[];
+    type?: ScopedCredentialType;
+}
+
+interface ScopedCredentialOptions {
+    excludeList?: ScopedCredentialDescriptor[];
+    extensions?: WebAuthnExtensions;
+    rpId?: USVString;
+    timeoutSeconds?: number;
+}
+
+interface ScopedCredentialParameters {
+    algorithm?: string | Algorithm;
+    type?: ScopedCredentialType;
+}
+
+interface ServiceWorkerMessageEventInit extends EventInit {
+    data?: any;
+    lastEventId?: string;
+    origin?: string;
+    ports?: MessagePort[];
+    source?: ServiceWorker | MessagePort;
+}
+
+interface SpeechSynthesisEventInit extends EventInit {
+    charIndex?: number;
+    elapsedTime?: number;
+    name?: string;
+    utterance?: SpeechSynthesisUtterance;
+}
+
+interface StoreExceptionsInformation extends ExceptionInformation {
+    detailURI?: string;
+    explanationString?: string;
+    siteName?: string;
+}
+
+interface StoreSiteSpecificExceptionsInformation extends StoreExceptionsInformation {
+    arrayOfDomainStrings?: string[];
+}
+
+interface TrackEventInit extends EventInit {
+    track?: VideoTrack | AudioTrack | TextTrack;
+}
+
+interface TransitionEventInit extends EventInit {
+    elapsedTime?: number;
+    propertyName?: string;
+}
+
+interface UIEventInit extends EventInit {
+    detail?: number;
+    view?: Window;
+}
+
+interface WebAuthnExtensions {
+}
+
+interface WebGLContextAttributes {
+    failIfMajorPerformanceCaveat?: boolean;
+    alpha?: boolean;
+    antialias?: boolean;
+    depth?: boolean;
+    premultipliedAlpha?: boolean;
+    preserveDrawingBuffer?: boolean;
+    stencil?: boolean;
+}
+
+interface WebGLContextEventInit extends EventInit {
+    statusMessage?: string;
+}
+
+interface WheelEventInit extends MouseEventInit {
+    deltaMode?: number;
+    deltaX?: number;
+    deltaY?: number;
+    deltaZ?: number;
+}
+
+interface EventListener {
+    (evt: Event): void;
+}
+
+interface WebKitEntriesCallback {
+    (evt: Event): void;
+}
+
+interface WebKitErrorCallback {
+    (evt: Event): void;
+}
+
+interface WebKitFileCallback {
+    (evt: Event): void;
+}
+
+interface AnalyserNode extends AudioNode {
+    fftSize: number;
+    readonly frequencyBinCount: number;
+    maxDecibels: number;
+    minDecibels: number;
+    smoothingTimeConstant: number;
+    getByteFrequencyData(array: Uint8Array): void;
+    getByteTimeDomainData(array: Uint8Array): void;
+    getFloatFrequencyData(array: Float32Array): void;
+    getFloatTimeDomainData(array: Float32Array): void;
+}
+
+declare var AnalyserNode: {
+    prototype: AnalyserNode;
+    new(): AnalyserNode;
+};
+
+interface ANGLE_instanced_arrays {
+    drawArraysInstancedANGLE(mode: number, first: number, count: number, primcount: number): void;
+    drawElementsInstancedANGLE(mode: number, count: number, type: number, offset: number, primcount: number): void;
+    vertexAttribDivisorANGLE(index: number, divisor: number): void;
+    readonly VERTEX_ATTRIB_ARRAY_DIVISOR_ANGLE: number;
+}
+
+declare var ANGLE_instanced_arrays: {
+    prototype: ANGLE_instanced_arrays;
+    new(): ANGLE_instanced_arrays;
+    readonly VERTEX_ATTRIB_ARRAY_DIVISOR_ANGLE: number;
+};
+
+interface AnimationEvent extends Event {
+    readonly animationName: string;
+    readonly elapsedTime: number;
+    initAnimationEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, animationNameArg: string, elapsedTimeArg: number): void;
+}
+
+declare var AnimationEvent: {
+    prototype: AnimationEvent;
+    new(typeArg: string, eventInitDict?: AnimationEventInit): AnimationEvent;
+};
+
+interface ApplicationCacheEventMap {
+    "cached": Event;
+    "checking": Event;
+    "downloading": Event;
+    "error": Event;
+    "noupdate": Event;
+    "obsolete": Event;
+    "progress": ProgressEvent;
+    "updateready": Event;
+}
+
+interface ApplicationCache extends EventTarget {
+    oncached: (this: ApplicationCache, ev: Event) => any;
+    onchecking: (this: ApplicationCache, ev: Event) => any;
+    ondownloading: (this: ApplicationCache, ev: Event) => any;
+    onerror: (this: ApplicationCache, ev: Event) => any;
+    onnoupdate: (this: ApplicationCache, ev: Event) => any;
+    onobsolete: (this: ApplicationCache, ev: Event) => any;
+    onprogress: (this: ApplicationCache, ev: ProgressEvent) => any;
+    onupdateready: (this: ApplicationCache, ev: Event) => any;
+    readonly status: number;
+    abort(): void;
+    swapCache(): void;
+    update(): void;
+    readonly CHECKING: number;
+    readonly DOWNLOADING: number;
+    readonly IDLE: number;
+    readonly OBSOLETE: number;
+    readonly UNCACHED: number;
+    readonly UPDATEREADY: number;
+    addEventListener<K extends keyof ApplicationCacheEventMap>(type: K, listener: (this: ApplicationCache, ev: ApplicationCacheEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var ApplicationCache: {
+    prototype: ApplicationCache;
+    new(): ApplicationCache;
+    readonly CHECKING: number;
+    readonly DOWNLOADING: number;
+    readonly IDLE: number;
+    readonly OBSOLETE: number;
+    readonly UNCACHED: number;
+    readonly UPDATEREADY: number;
+};
+
+interface Attr extends Node {
+    readonly name: string;
+    readonly ownerElement: Element;
+    readonly prefix: string | null;
+    readonly specified: boolean;
+    value: string;
+}
+
+declare var Attr: {
+    prototype: Attr;
+    new(): Attr;
+};
+
+interface AudioBuffer {
+    readonly duration: number;
+    readonly length: number;
+    readonly numberOfChannels: number;
+    readonly sampleRate: number;
+    copyFromChannel(destination: Float32Array, channelNumber: number, startInChannel?: number): void;
+    copyToChannel(source: Float32Array, channelNumber: number, startInChannel?: number): void;
+    getChannelData(channel: number): Float32Array;
+}
+
+declare var AudioBuffer: {
+    prototype: AudioBuffer;
+    new(): AudioBuffer;
+};
+
+interface AudioBufferSourceNodeEventMap {
+    "ended": MediaStreamErrorEvent;
+}
+
+interface AudioBufferSourceNode extends AudioNode {
+    buffer: AudioBuffer | null;
+    readonly detune: AudioParam;
+    loop: boolean;
+    loopEnd: number;
+    loopStart: number;
+    onended: (this: AudioBufferSourceNode, ev: MediaStreamErrorEvent) => any;
+    readonly playbackRate: AudioParam;
+    start(when?: number, offset?: number, duration?: number): void;
+    stop(when?: number): void;
+    addEventListener<K extends keyof AudioBufferSourceNodeEventMap>(type: K, listener: (this: AudioBufferSourceNode, ev: AudioBufferSourceNodeEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var AudioBufferSourceNode: {
+    prototype: AudioBufferSourceNode;
+    new(): AudioBufferSourceNode;
+};
+
+interface AudioContextEventMap {
+    "statechange": Event;
+}
+
+interface AudioContextBase extends EventTarget {
+    readonly currentTime: number;
+    readonly destination: AudioDestinationNode;
+    readonly listener: AudioListener;
+    onstatechange: (this: AudioContext, ev: Event) => any;
+    readonly sampleRate: number;
+    readonly state: AudioContextState;
+    close(): Promise<void>;
+    createAnalyser(): AnalyserNode;
+    createBiquadFilter(): BiquadFilterNode;
+    createBuffer(numberOfChannels: number, length: number, sampleRate: number): AudioBuffer;
+    createBufferSource(): AudioBufferSourceNode;
+    createChannelMerger(numberOfInputs?: number): ChannelMergerNode;
+    createChannelSplitter(numberOfOutputs?: number): ChannelSplitterNode;
+    createConvolver(): ConvolverNode;
+    createDelay(maxDelayTime?: number): DelayNode;
+    createDynamicsCompressor(): DynamicsCompressorNode;
+    createGain(): GainNode;
+    createIIRFilter(feedforward: number[], feedback: number[]): IIRFilterNode;
+    createMediaElementSource(mediaElement: HTMLMediaElement): MediaElementAudioSourceNode;
+    createMediaStreamSource(mediaStream: MediaStream): MediaStreamAudioSourceNode;
+    createOscillator(): OscillatorNode;
+    createPanner(): PannerNode;
+    createPeriodicWave(real: Float32Array, imag: Float32Array, constraints?: PeriodicWaveConstraints): PeriodicWave;
+    createScriptProcessor(bufferSize?: number, numberOfInputChannels?: number, numberOfOutputChannels?: number): ScriptProcessorNode;
+    createStereoPanner(): StereoPannerNode;
+    createWaveShaper(): WaveShaperNode;
+    decodeAudioData(audioData: ArrayBuffer, successCallback?: DecodeSuccessCallback, errorCallback?: DecodeErrorCallback): Promise<AudioBuffer>;
+    resume(): Promise<void>;
+    addEventListener<K extends keyof AudioContextEventMap>(type: K, listener: (this: AudioContext, ev: AudioContextEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+interface AudioContext extends AudioContextBase {
+    suspend(): Promise<void>;
+}
+
+declare var AudioContext: {
+    prototype: AudioContext;
+    new(): AudioContext;
+};
+
+interface AudioDestinationNode extends AudioNode {
+    readonly maxChannelCount: number;
+}
+
+declare var AudioDestinationNode: {
+    prototype: AudioDestinationNode;
+    new(): AudioDestinationNode;
+};
+
+interface AudioListener {
+    dopplerFactor: number;
+    speedOfSound: number;
+    setOrientation(x: number, y: number, z: number, xUp: number, yUp: number, zUp: number): void;
+    setPosition(x: number, y: number, z: number): void;
+    setVelocity(x: number, y: number, z: number): void;
+}
+
+declare var AudioListener: {
+    prototype: AudioListener;
+    new(): AudioListener;
+};
+
+interface AudioNode extends EventTarget {
+    channelCount: number;
+    channelCountMode: ChannelCountMode;
+    channelInterpretation: ChannelInterpretation;
+    readonly context: AudioContext;
+    readonly numberOfInputs: number;
+    readonly numberOfOutputs: number;
+    connect(destination: AudioNode, output?: number, input?: number): AudioNode;
+    connect(destination: AudioParam, output?: number): void;
+    disconnect(output?: number): void;
+    disconnect(destination: AudioNode, output?: number, input?: number): void;
+    disconnect(destination: AudioParam, output?: number): void;
+}
+
+declare var AudioNode: {
+    prototype: AudioNode;
+    new(): AudioNode;
+};
+
+interface AudioParam {
+    readonly defaultValue: number;
+    value: number;
+    cancelScheduledValues(startTime: number): AudioParam;
+    exponentialRampToValueAtTime(value: number, endTime: number): AudioParam;
+    linearRampToValueAtTime(value: number, endTime: number): AudioParam;
+    setTargetAtTime(target: number, startTime: number, timeConstant: number): AudioParam;
+    setValueAtTime(value: number, startTime: number): AudioParam;
+    setValueCurveAtTime(values: Float32Array, startTime: number, duration: number): AudioParam;
+}
+
+declare var AudioParam: {
+    prototype: AudioParam;
+    new(): AudioParam;
+};
+
+interface AudioProcessingEvent extends Event {
+    readonly inputBuffer: AudioBuffer;
+    readonly outputBuffer: AudioBuffer;
+    readonly playbackTime: number;
+}
+
+declare var AudioProcessingEvent: {
+    prototype: AudioProcessingEvent;
+    new(): AudioProcessingEvent;
+};
+
+interface AudioTrack {
+    enabled: boolean;
+    readonly id: string;
+    kind: string;
+    readonly label: string;
+    language: string;
+    readonly sourceBuffer: SourceBuffer;
+}
+
+declare var AudioTrack: {
+    prototype: AudioTrack;
+    new(): AudioTrack;
+};
+
+interface AudioTrackListEventMap {
+    "addtrack": TrackEvent;
+    "change": Event;
+    "removetrack": TrackEvent;
+}
+
+interface AudioTrackList extends EventTarget {
+    readonly length: number;
+    onaddtrack: (this: AudioTrackList, ev: TrackEvent) => any;
+    onchange: (this: AudioTrackList, ev: Event) => any;
+    onremovetrack: (this: AudioTrackList, ev: TrackEvent) => any;
+    getTrackById(id: string): AudioTrack | null;
+    item(index: number): AudioTrack;
+    addEventListener<K extends keyof AudioTrackListEventMap>(type: K, listener: (this: AudioTrackList, ev: AudioTrackListEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+    [index: number]: AudioTrack;
+}
+
+declare var AudioTrackList: {
+    prototype: AudioTrackList;
+    new(): AudioTrackList;
+};
+
+interface BarProp {
+    readonly visible: boolean;
+}
+
+declare var BarProp: {
+    prototype: BarProp;
+    new(): BarProp;
+};
+
+interface BeforeUnloadEvent extends Event {
+    returnValue: any;
+}
+
+declare var BeforeUnloadEvent: {
+    prototype: BeforeUnloadEvent;
+    new(): BeforeUnloadEvent;
+};
+
+interface BiquadFilterNode extends AudioNode {
+    readonly detune: AudioParam;
+    readonly frequency: AudioParam;
+    readonly gain: AudioParam;
+    readonly Q: AudioParam;
+    type: BiquadFilterType;
+    getFrequencyResponse(frequencyHz: Float32Array, magResponse: Float32Array, phaseResponse: Float32Array): void;
+}
+
+declare var BiquadFilterNode: {
+    prototype: BiquadFilterNode;
+    new(): BiquadFilterNode;
+};
+
+interface Blob {
+    readonly size: number;
+    readonly type: string;
+    msClose(): void;
+    msDetachStream(): any;
+    slice(start?: number, end?: number, contentType?: string): Blob;
+}
+
+declare var Blob: {
+    prototype: Blob;
+    new (blobParts?: any[], options?: BlobPropertyBag): Blob;
+};
+
+interface Cache {
+    add(request: RequestInfo): Promise<void>;
+    addAll(requests: RequestInfo[]): Promise<void>;
+    delete(request: RequestInfo, options?: CacheQueryOptions): Promise<boolean>;
+    keys(request?: RequestInfo, options?: CacheQueryOptions): any;
+    match(request: RequestInfo, options?: CacheQueryOptions): Promise<Response>;
+    matchAll(request?: RequestInfo, options?: CacheQueryOptions): any;
+    put(request: RequestInfo, response: Response): Promise<void>;
+}
+
+declare var Cache: {
+    prototype: Cache;
+    new(): Cache;
+};
+
+interface CacheStorage {
+    delete(cacheName: string): Promise<boolean>;
+    has(cacheName: string): Promise<boolean>;
+    keys(): any;
+    match(request: RequestInfo, options?: CacheQueryOptions): Promise<any>;
+    open(cacheName: string): Promise<Cache>;
+}
+
+declare var CacheStorage: {
+    prototype: CacheStorage;
+    new(): CacheStorage;
+};
+
+interface CanvasGradient {
+    addColorStop(offset: number, color: string): void;
+}
+
+declare var CanvasGradient: {
+    prototype: CanvasGradient;
+    new(): CanvasGradient;
+};
+
+interface CanvasPattern {
+    setTransform(matrix: SVGMatrix): void;
+}
+
+declare var CanvasPattern: {
+    prototype: CanvasPattern;
+    new(): CanvasPattern;
+};
+
+interface CanvasRenderingContext2D extends Object, CanvasPathMethods {
+    readonly canvas: HTMLCanvasElement;
+    fillStyle: string | CanvasGradient | CanvasPattern;
+    font: string;
+    globalAlpha: number;
+    globalCompositeOperation: string;
+    imageSmoothingEnabled: boolean;
+    lineCap: string;
+    lineDashOffset: number;
+    lineJoin: string;
+    lineWidth: number;
+    miterLimit: number;
+    msFillRule: CanvasFillRule;
+    shadowBlur: number;
+    shadowColor: string;
+    shadowOffsetX: number;
+    shadowOffsetY: number;
+    strokeStyle: string | CanvasGradient | CanvasPattern;
+    textAlign: string;
+    textBaseline: string;
+    mozImageSmoothingEnabled: boolean;
+    webkitImageSmoothingEnabled: boolean;
+    oImageSmoothingEnabled: boolean;
+    beginPath(): void;
+    clearRect(x: number, y: number, w: number, h: number): void;
+    clip(fillRule?: CanvasFillRule): void;
+    createImageData(imageDataOrSw: number | ImageData, sh?: number): ImageData;
+    createLinearGradient(x0: number, y0: number, x1: number, y1: number): CanvasGradient;
+    createPattern(image: HTMLImageElement | HTMLCanvasElement | HTMLVideoElement, repetition: string): CanvasPattern;
+    createRadialGradient(x0: number, y0: number, r0: number, x1: number, y1: number, r1: number): CanvasGradient;
+    drawFocusIfNeeded(element: Element): void;
+    drawImage(image: HTMLImageElement | HTMLCanvasElement | HTMLVideoElement | ImageBitmap, dstX: number, dstY: number): void;
+    drawImage(image: HTMLImageElement | HTMLCanvasElement | HTMLVideoElement | ImageBitmap, dstX: number, dstY: number, dstW: number, dstH: number): void;
+    drawImage(image: HTMLImageElement | HTMLCanvasElement | HTMLVideoElement | ImageBitmap, srcX: number, srcY: number, srcW: number, srcH: number, dstX: number, dstY: number, dstW: number, dstH: number): void;
+    fill(fillRule?: CanvasFillRule): void;
+    fillRect(x: number, y: number, w: number, h: number): void;
+    fillText(text: string, x: number, y: number, maxWidth?: number): void;
+    getImageData(sx: number, sy: number, sw: number, sh: number): ImageData;
+    getLineDash(): number[];
+    isPointInPath(x: number, y: number, fillRule?: CanvasFillRule): boolean;
+    measureText(text: string): TextMetrics;
+    putImageData(imagedata: ImageData, dx: number, dy: number, dirtyX?: number, dirtyY?: number, dirtyWidth?: number, dirtyHeight?: number): void;
+    restore(): void;
+    rotate(angle: number): void;
+    save(): void;
+    scale(x: number, y: number): void;
+    setLineDash(segments: number[]): void;
+    setTransform(m11: number, m12: number, m21: number, m22: number, dx: number, dy: number): void;
+    stroke(path?: Path2D): void;
+    strokeRect(x: number, y: number, w: number, h: number): void;
+    strokeText(text: string, x: number, y: number, maxWidth?: number): void;
+    transform(m11: number, m12: number, m21: number, m22: number, dx: number, dy: number): void;
+    translate(x: number, y: number): void;
+}
+
+declare var CanvasRenderingContext2D: {
+    prototype: CanvasRenderingContext2D;
+    new(): CanvasRenderingContext2D;
+};
+
+interface CDATASection extends Text {
+}
+
+declare var CDATASection: {
+    prototype: CDATASection;
+    new(): CDATASection;
+};
+
+interface ChannelMergerNode extends AudioNode {
+}
+
+declare var ChannelMergerNode: {
+    prototype: ChannelMergerNode;
+    new(): ChannelMergerNode;
+};
+
+interface ChannelSplitterNode extends AudioNode {
+}
+
+declare var ChannelSplitterNode: {
+    prototype: ChannelSplitterNode;
+    new(): ChannelSplitterNode;
+};
+
+interface CharacterData extends Node, ChildNode {
+    data: string;
+    readonly length: number;
+    appendData(arg: string): void;
+    deleteData(offset: number, count: number): void;
+    insertData(offset: number, arg: string): void;
+    replaceData(offset: number, count: number, arg: string): void;
+    substringData(offset: number, count: number): string;
+}
+
+declare var CharacterData: {
+    prototype: CharacterData;
+    new(): CharacterData;
+};
+
+interface ClientRect {
+    bottom: number;
+    readonly height: number;
+    left: number;
+    right: number;
+    top: number;
+    readonly width: number;
+}
+
+declare var ClientRect: {
+    prototype: ClientRect;
+    new(): ClientRect;
+};
+
+interface ClientRectList {
+    readonly length: number;
+    item(index: number): ClientRect;
+    [index: number]: ClientRect;
+}
+
+declare var ClientRectList: {
+    prototype: ClientRectList;
+    new(): ClientRectList;
+};
+
+interface ClipboardEvent extends Event {
+    readonly clipboardData: DataTransfer;
+}
+
+declare var ClipboardEvent: {
+    prototype: ClipboardEvent;
+    new(type: string, eventInitDict?: ClipboardEventInit): ClipboardEvent;
+};
+
+interface CloseEvent extends Event {
+    readonly code: number;
+    readonly reason: string;
+    readonly wasClean: boolean;
+    initCloseEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, wasCleanArg: boolean, codeArg: number, reasonArg: string): void;
+}
+
+declare var CloseEvent: {
+    prototype: CloseEvent;
+    new(typeArg: string, eventInitDict?: CloseEventInit): CloseEvent;
+};
+
+interface Comment extends CharacterData {
+    text: string;
+}
+
+declare var Comment: {
+    prototype: Comment;
+    new(): Comment;
+};
+
+interface CompositionEvent extends UIEvent {
+    readonly data: string;
+    readonly locale: string;
+    initCompositionEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, dataArg: string, locale: string): void;
+}
+
+declare var CompositionEvent: {
+    prototype: CompositionEvent;
+    new(typeArg: string, eventInitDict?: CompositionEventInit): CompositionEvent;
+};
+
+interface Console {
+    assert(test?: boolean, message?: string, ...optionalParams: any[]): void;
+    clear(): void;
+    count(countTitle?: string): void;
+    debug(message?: any, ...optionalParams: any[]): void;
+    dir(value?: any, ...optionalParams: any[]): void;
+    dirxml(value: any): void;
+    error(message?: any, ...optionalParams: any[]): void;
+    exception(message?: string, ...optionalParams: any[]): void;
+    group(groupTitle?: string, ...optionalParams: any[]): void;
+    groupCollapsed(groupTitle?: string, ...optionalParams: any[]): void;
+    groupEnd(): void;
+    info(message?: any, ...optionalParams: any[]): void;
+    log(message?: any, ...optionalParams: any[]): void;
+    msIsIndependentlyComposed(element: Element): boolean;
+    profile(reportName?: string): void;
+    profileEnd(): void;
+    select(element: Element): void;
+    table(...data: any[]): void;
+    time(timerName?: string): void;
+    timeEnd(timerName?: string): void;
+    trace(message?: any, ...optionalParams: any[]): void;
+    warn(message?: any, ...optionalParams: any[]): void;
+}
+
+declare var Console: {
+    prototype: Console;
+    new(): Console;
+};
+
+interface ConvolverNode extends AudioNode {
+    buffer: AudioBuffer | null;
+    normalize: boolean;
+}
+
+declare var ConvolverNode: {
+    prototype: ConvolverNode;
+    new(): ConvolverNode;
+};
+
+interface Coordinates {
+    readonly accuracy: number;
+    readonly altitude: number | null;
+    readonly altitudeAccuracy: number | null;
+    readonly heading: number | null;
+    readonly latitude: number;
+    readonly longitude: number;
+    readonly speed: number | null;
+}
+
+declare var Coordinates: {
+    prototype: Coordinates;
+    new(): Coordinates;
+};
+
+interface Crypto extends Object, RandomSource {
+    readonly subtle: SubtleCrypto;
+}
+
+declare var Crypto: {
+    prototype: Crypto;
+    new(): Crypto;
+};
+
+interface CryptoKey {
+    readonly algorithm: KeyAlgorithm;
+    readonly extractable: boolean;
+    readonly type: string;
+    readonly usages: string[];
+}
+
+declare var CryptoKey: {
+    prototype: CryptoKey;
+    new(): CryptoKey;
+};
+
+interface CryptoKeyPair {
+    privateKey: CryptoKey;
+    publicKey: CryptoKey;
+}
+
+declare var CryptoKeyPair: {
+    prototype: CryptoKeyPair;
+    new(): CryptoKeyPair;
+};
+
+interface CSS {
+    supports(property: string, value?: string): boolean;
+}
+declare var CSS: CSS;
+
+interface CSSConditionRule extends CSSGroupingRule {
+    conditionText: string;
+}
+
+declare var CSSConditionRule: {
+    prototype: CSSConditionRule;
+    new(): CSSConditionRule;
+};
+
+interface CSSFontFaceRule extends CSSRule {
+    readonly style: CSSStyleDeclaration;
+}
+
+declare var CSSFontFaceRule: {
+    prototype: CSSFontFaceRule;
+    new(): CSSFontFaceRule;
+};
+
+interface CSSGroupingRule extends CSSRule {
+    readonly cssRules: CSSRuleList;
+    deleteRule(index: number): void;
+    insertRule(rule: string, index: number): number;
+}
+
+declare var CSSGroupingRule: {
+    prototype: CSSGroupingRule;
+    new(): CSSGroupingRule;
+};
+
+interface CSSImportRule extends CSSRule {
+    readonly href: string;
+    readonly media: MediaList;
+    readonly styleSheet: CSSStyleSheet;
+}
+
+declare var CSSImportRule: {
+    prototype: CSSImportRule;
+    new(): CSSImportRule;
+};
+
+interface CSSKeyframeRule extends CSSRule {
+    keyText: string;
+    readonly style: CSSStyleDeclaration;
+}
+
+declare var CSSKeyframeRule: {
+    prototype: CSSKeyframeRule;
+    new(): CSSKeyframeRule;
+};
+
+interface CSSKeyframesRule extends CSSRule {
+    readonly cssRules: CSSRuleList;
+    name: string;
+    appendRule(rule: string): void;
+    deleteRule(rule: string): void;
+    findRule(rule: string): CSSKeyframeRule;
+}
+
+declare var CSSKeyframesRule: {
+    prototype: CSSKeyframesRule;
+    new(): CSSKeyframesRule;
+};
+
+interface CSSMediaRule extends CSSConditionRule {
+    readonly media: MediaList;
+}
+
+declare var CSSMediaRule: {
+    prototype: CSSMediaRule;
+    new(): CSSMediaRule;
+};
+
+interface CSSNamespaceRule extends CSSRule {
+    readonly namespaceURI: string;
+    readonly prefix: string;
+}
+
+declare var CSSNamespaceRule: {
+    prototype: CSSNamespaceRule;
+    new(): CSSNamespaceRule;
+};
+
+interface CSSPageRule extends CSSRule {
+    readonly pseudoClass: string;
+    readonly selector: string;
+    selectorText: string;
+    readonly style: CSSStyleDeclaration;
+}
+
+declare var CSSPageRule: {
+    prototype: CSSPageRule;
+    new(): CSSPageRule;
+};
+
+interface CSSRule {
+    cssText: string;
+    readonly parentRule: CSSRule;
+    readonly parentStyleSheet: CSSStyleSheet;
+    readonly type: number;
+    readonly CHARSET_RULE: number;
+    readonly FONT_FACE_RULE: number;
+    readonly IMPORT_RULE: number;
+    readonly KEYFRAME_RULE: number;
+    readonly KEYFRAMES_RULE: number;
+    readonly MEDIA_RULE: number;
+    readonly NAMESPACE_RULE: number;
+    readonly PAGE_RULE: number;
+    readonly STYLE_RULE: number;
+    readonly SUPPORTS_RULE: number;
+    readonly UNKNOWN_RULE: number;
+    readonly VIEWPORT_RULE: number;
+}
+
+declare var CSSRule: {
+    prototype: CSSRule;
+    new(): CSSRule;
+    readonly CHARSET_RULE: number;
+    readonly FONT_FACE_RULE: number;
+    readonly IMPORT_RULE: number;
+    readonly KEYFRAME_RULE: number;
+    readonly KEYFRAMES_RULE: number;
+    readonly MEDIA_RULE: number;
+    readonly NAMESPACE_RULE: number;
+    readonly PAGE_RULE: number;
+    readonly STYLE_RULE: number;
+    readonly SUPPORTS_RULE: number;
+    readonly UNKNOWN_RULE: number;
+    readonly VIEWPORT_RULE: number;
+};
+
+interface CSSRuleList {
+    readonly length: number;
+    item(index: number): CSSRule;
+    [index: number]: CSSRule;
+}
+
+declare var CSSRuleList: {
+    prototype: CSSRuleList;
+    new(): CSSRuleList;
+};
+
+interface CSSStyleDeclaration {
+    alignContent: string | null;
+    alignItems: string | null;
+    alignmentBaseline: string | null;
+    alignSelf: string | null;
+    animation: string | null;
+    animationDelay: string | null;
+    animationDirection: string | null;
+    animationDuration: string | null;
+    animationFillMode: string | null;
+    animationIterationCount: string | null;
+    animationName: string | null;
+    animationPlayState: string | null;
+    animationTimingFunction: string | null;
+    backfaceVisibility: string | null;
+    background: string | null;
+    backgroundAttachment: string | null;
+    backgroundClip: string | null;
+    backgroundColor: string | null;
+    backgroundImage: string | null;
+    backgroundOrigin: string | null;
+    backgroundPosition: string | null;
+    backgroundPositionX: string | null;
+    backgroundPositionY: string | null;
+    backgroundRepeat: string | null;
+    backgroundSize: string | null;
+    baselineShift: string | null;
+    border: string | null;
+    borderBottom: string | null;
+    borderBottomColor: string | null;
+    borderBottomLeftRadius: string | null;
+    borderBottomRightRadius: string | null;
+    borderBottomStyle: string | null;
+    borderBottomWidth: string | null;
+    borderCollapse: string | null;
+    borderColor: string | null;
+    borderImage: string | null;
+    borderImageOutset: string | null;
+    borderImageRepeat: string | null;
+    borderImageSlice: string | null;
+    borderImageSource: string | null;
+    borderImageWidth: string | null;
+    borderLeft: string | null;
+    borderLeftColor: string | null;
+    borderLeftStyle: string | null;
+    borderLeftWidth: string | null;
+    borderRadius: string | null;
+    borderRight: string | null;
+    borderRightColor: string | null;
+    borderRightStyle: string | null;
+    borderRightWidth: string | null;
+    borderSpacing: string | null;
+    borderStyle: string | null;
+    borderTop: string | null;
+    borderTopColor: string | null;
+    borderTopLeftRadius: string | null;
+    borderTopRightRadius: string | null;
+    borderTopStyle: string | null;
+    borderTopWidth: string | null;
+    borderWidth: string | null;
+    bottom: string | null;
+    boxShadow: string | null;
+    boxSizing: string | null;
+    breakAfter: string | null;
+    breakBefore: string | null;
+    breakInside: string | null;
+    captionSide: string | null;
+    clear: string | null;
+    clip: string | null;
+    clipPath: string | null;
+    clipRule: string | null;
+    color: string | null;
+    colorInterpolationFilters: string | null;
+    columnCount: any;
+    columnFill: string | null;
+    columnGap: any;
+    columnRule: string | null;
+    columnRuleColor: any;
+    columnRuleStyle: string | null;
+    columnRuleWidth: any;
+    columns: string | null;
+    columnSpan: string | null;
+    columnWidth: any;
+    content: string | null;
+    counterIncrement: string | null;
+    counterReset: string | null;
+    cssFloat: string | null;
+    cssText: string;
+    cursor: string | null;
+    direction: string | null;
+    display: string | null;
+    dominantBaseline: string | null;
+    emptyCells: string | null;
+    enableBackground: string | null;
+    fill: string | null;
+    fillOpacity: string | null;
+    fillRule: string | null;
+    filter: string | null;
+    flex: string | null;
+    flexBasis: string | null;
+    flexDirection: string | null;
+    flexFlow: string | null;
+    flexGrow: string | null;
+    flexShrink: string | null;
+    flexWrap: string | null;
+    floodColor: string | null;
+    floodOpacity: string | null;
+    font: string | null;
+    fontFamily: string | null;
+    fontFeatureSettings: string | null;
+    fontSize: string | null;
+    fontSizeAdjust: string | null;
+    fontStretch: string | null;
+    fontStyle: string | null;
+    fontVariant: string | null;
+    fontWeight: string | null;
+    glyphOrientationHorizontal: string | null;
+    glyphOrientationVertical: string | null;
+    height: string | null;
+    imeMode: string | null;
+    justifyContent: string | null;
+    kerning: string | null;
+    layoutGrid: string | null;
+    layoutGridChar: string | null;
+    layoutGridLine: string | null;
+    layoutGridMode: string | null;
+    layoutGridType: string | null;
+    left: string | null;
+    readonly length: number;
+    letterSpacing: string | null;
+    lightingColor: string | null;
+    lineBreak: string | null;
+    lineHeight: string | null;
+    listStyle: string | null;
+    listStyleImage: string | null;
+    listStylePosition: string | null;
+    listStyleType: string | null;
+    margin: string | null;
+    marginBottom: string | null;
+    marginLeft: string | null;
+    marginRight: string | null;
+    marginTop: string | null;
+    marker: string | null;
+    markerEnd: string | null;
+    markerMid: string | null;
+    markerStart: string | null;
+    mask: string | null;
+    maxHeight: string | null;
+    maxWidth: string | null;
+    minHeight: string | null;
+    minWidth: string | null;
+    msContentZoomChaining: string | null;
+    msContentZooming: string | null;
+    msContentZoomLimit: string | null;
+    msContentZoomLimitMax: any;
+    msContentZoomLimitMin: any;
+    msContentZoomSnap: string | null;
+    msContentZoomSnapPoints: string | null;
+    msContentZoomSnapType: string | null;
+    msFlowFrom: string | null;
+    msFlowInto: string | null;
+    msFontFeatureSettings: string | null;
+    msGridColumn: any;
+    msGridColumnAlign: string | null;
+    msGridColumns: string | null;
+    msGridColumnSpan: any;
+    msGridRow: any;
+    msGridRowAlign: string | null;
+    msGridRows: string | null;
+    msGridRowSpan: any;
+    msHighContrastAdjust: string | null;
+    msHyphenateLimitChars: string | null;
+    msHyphenateLimitLines: any;
+    msHyphenateLimitZone: any;
+    msHyphens: string | null;
+    msImeAlign: string | null;
+    msOverflowStyle: string | null;
+    msScrollChaining: string | null;
+    msScrollLimit: string | null;
+    msScrollLimitXMax: any;
+    msScrollLimitXMin: any;
+    msScrollLimitYMax: any;
+    msScrollLimitYMin: any;
+    msScrollRails: string | null;
+    msScrollSnapPointsX: string | null;
+    msScrollSnapPointsY: string | null;
+    msScrollSnapType: string | null;
+    msScrollSnapX: string | null;
+    msScrollSnapY: string | null;
+    msScrollTranslation: string | null;
+    msTextCombineHorizontal: string | null;
+    msTextSizeAdjust: any;
+    msTouchAction: string | null;
+    msTouchSelect: string | null;
+    msUserSelect: string | null;
+    msWrapFlow: string;
+    msWrapMargin: any;
+    msWrapThrough: string;
+    opacity: string | null;
+    order: string | null;
+    orphans: string | null;
+    outline: string | null;
+    outlineColor: string | null;
+    outlineOffset: string | null;
+    outlineStyle: string | null;
+    outlineWidth: string | null;
+    overflow: string | null;
+    overflowX: string | null;
+    overflowY: string | null;
+    padding: string | null;
+    paddingBottom: string | null;
+    paddingLeft: string | null;
+    paddingRight: string | null;
+    paddingTop: string | null;
+    pageBreakAfter: string | null;
+    pageBreakBefore: string | null;
+    pageBreakInside: string | null;
+    readonly parentRule: CSSRule;
+    perspective: string | null;
+    perspectiveOrigin: string | null;
+    pointerEvents: string | null;
+    position: string | null;
+    quotes: string | null;
+    right: string | null;
+    rotate: string | null;
+    rubyAlign: string | null;
+    rubyOverhang: string | null;
+    rubyPosition: string | null;
+    scale: string | null;
+    stopColor: string | null;
+    stopOpacity: string | null;
+    stroke: string | null;
+    strokeDasharray: string | null;
+    strokeDashoffset: string | null;
+    strokeLinecap: string | null;
+    strokeLinejoin: string | null;
+    strokeMiterlimit: string | null;
+    strokeOpacity: string | null;
+    strokeWidth: string | null;
+    tableLayout: string | null;
+    textAlign: string | null;
+    textAlignLast: string | null;
+    textAnchor: string | null;
+    textDecoration: string | null;
+    textIndent: string | null;
+    textJustify: string | null;
+    textKashida: string | null;
+    textKashidaSpace: string | null;
+    textOverflow: string | null;
+    textShadow: string | null;
+    textTransform: string | null;
+    textUnderlinePosition: string | null;
+    top: string | null;
+    touchAction: string | null;
+    transform: string | null;
+    transformOrigin: string | null;
+    transformStyle: string | null;
+    transition: string | null;
+    transitionDelay: string | null;
+    transitionDuration: string | null;
+    transitionProperty: string | null;
+    transitionTimingFunction: string | null;
+    translate: string | null;
+    unicodeBidi: string | null;
+    verticalAlign: string | null;
+    visibility: string | null;
+    webkitAlignContent: string | null;
+    webkitAlignItems: string | null;
+    webkitAlignSelf: string | null;
+    webkitAnimation: string | null;
+    webkitAnimationDelay: string | null;
+    webkitAnimationDirection: string | null;
+    webkitAnimationDuration: string | null;
+    webkitAnimationFillMode: string | null;
+    webkitAnimationIterationCount: string | null;
+    webkitAnimationName: string | null;
+    webkitAnimationPlayState: string | null;
+    webkitAnimationTimingFunction: string | null;
+    webkitAppearance: string | null;
+    webkitBackfaceVisibility: string | null;
+    webkitBackgroundClip: string | null;
+    webkitBackgroundOrigin: string | null;
+    webkitBackgroundSize: string | null;
+    webkitBorderBottomLeftRadius: string | null;
+    webkitBorderBottomRightRadius: string | null;
+    webkitBorderImage: string | null;
+    webkitBorderRadius: string | null;
+    webkitBorderTopLeftRadius: string | null;
+    webkitBorderTopRightRadius: string | null;
+    webkitBoxAlign: string | null;
+    webkitBoxDirection: string | null;
+    webkitBoxFlex: string | null;
+    webkitBoxOrdinalGroup: string | null;
+    webkitBoxOrient: string | null;
+    webkitBoxPack: string | null;
+    webkitBoxSizing: string | null;
+    webkitColumnBreakAfter: string | null;
+    webkitColumnBreakBefore: string | null;
+    webkitColumnBreakInside: string | null;
+    webkitColumnCount: any;
+    webkitColumnGap: any;
+    webkitColumnRule: string | null;
+    webkitColumnRuleColor: any;
+    webkitColumnRuleStyle: string | null;
+    webkitColumnRuleWidth: any;
+    webkitColumns: string | null;
+    webkitColumnSpan: string | null;
+    webkitColumnWidth: any;
+    webkitFilter: string | null;
+    webkitFlex: string | null;
+    webkitFlexBasis: string | null;
+    webkitFlexDirection: string | null;
+    webkitFlexFlow: string | null;
+    webkitFlexGrow: string | null;
+    webkitFlexShrink: string | null;
+    webkitFlexWrap: string | null;
+    webkitJustifyContent: string | null;
+    webkitOrder: string | null;
+    webkitPerspective: string | null;
+    webkitPerspectiveOrigin: string | null;
+    webkitTapHighlightColor: string | null;
+    webkitTextFillColor: string | null;
+    webkitTextSizeAdjust: any;
+    webkitTextStroke: string | null;
+    webkitTextStrokeColor: string | null;
+    webkitTextStrokeWidth: string | null;
+    webkitTransform: string | null;
+    webkitTransformOrigin: string | null;
+    webkitTransformStyle: string | null;
+    webkitTransition: string | null;
+    webkitTransitionDelay: string | null;
+    webkitTransitionDuration: string | null;
+    webkitTransitionProperty: string | null;
+    webkitTransitionTimingFunction: string | null;
+    webkitUserModify: string | null;
+    webkitUserSelect: string | null;
+    webkitWritingMode: string | null;
+    whiteSpace: string | null;
+    widows: string | null;
+    width: string | null;
+    wordBreak: string | null;
+    wordSpacing: string | null;
+    wordWrap: string | null;
+    writingMode: string | null;
+    zIndex: string | null;
+    zoom: string | null;
+    resize: string | null;
+    userSelect: string | null;
+    getPropertyPriority(propertyName: string): string;
+    getPropertyValue(propertyName: string): string;
+    item(index: number): string;
+    removeProperty(propertyName: string): string;
+    setProperty(propertyName: string, value: string | null, priority?: string): void;
+    [index: number]: string;
+}
+
+declare var CSSStyleDeclaration: {
+    prototype: CSSStyleDeclaration;
+    new(): CSSStyleDeclaration;
+};
+
+interface CSSStyleRule extends CSSRule {
+    readonly readOnly: boolean;
+    selectorText: string;
+    readonly style: CSSStyleDeclaration;
+}
+
+declare var CSSStyleRule: {
+    prototype: CSSStyleRule;
+    new(): CSSStyleRule;
+};
+
+interface CSSStyleSheet extends StyleSheet {
+    readonly cssRules: CSSRuleList;
+    cssText: string;
+    readonly id: string;
+    readonly imports: StyleSheetList;
+    readonly isAlternate: boolean;
+    readonly isPrefAlternate: boolean;
+    readonly ownerRule: CSSRule;
+    readonly owningElement: Element;
+    readonly pages: StyleSheetPageList;
+    readonly readOnly: boolean;
+    readonly rules: CSSRuleList;
+    addImport(bstrURL: string, lIndex?: number): number;
+    addPageRule(bstrSelector: string, bstrStyle: string, lIndex?: number): number;
+    addRule(bstrSelector: string, bstrStyle?: string, lIndex?: number): number;
+    deleteRule(index?: number): void;
+    insertRule(rule: string, index?: number): number;
+    removeImport(lIndex: number): void;
+    removeRule(lIndex: number): void;
+}
+
+declare var CSSStyleSheet: {
+    prototype: CSSStyleSheet;
+    new(): CSSStyleSheet;
+};
+
+interface CSSSupportsRule extends CSSConditionRule {
+}
+
+declare var CSSSupportsRule: {
+    prototype: CSSSupportsRule;
+    new(): CSSSupportsRule;
+};
+
+interface CustomEvent extends Event {
+    readonly detail: any;
+    initCustomEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, detailArg: any): void;
+}
+
+declare var CustomEvent: {
+    prototype: CustomEvent;
+    new(typeArg: string, eventInitDict?: CustomEventInit): CustomEvent;
+};
+
+interface DataCue extends TextTrackCue {
+    data: ArrayBuffer;
+    addEventListener<K extends keyof TextTrackCueEventMap>(type: K, listener: (this: DataCue, ev: TextTrackCueEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var DataCue: {
+    prototype: DataCue;
+    new(): DataCue;
+};
+
+interface DataTransfer {
+    dropEffect: string;
+    effectAllowed: string;
+    readonly files: FileList;
+    readonly items: DataTransferItemList;
+    readonly types: string[];
+    clearData(format?: string): boolean;
+    getData(format: string): string;
+    setData(format: string, data: string): boolean;
+    setDragImage(image: Element, x: number, y: number): void;
+}
+
+declare var DataTransfer: {
+    prototype: DataTransfer;
+    new(): DataTransfer;
+};
+
+interface DataTransferItem {
+    readonly kind: string;
+    readonly type: string;
+    getAsFile(): File | null;
+    getAsString(_callback: FunctionStringCallback | null): void;
+    webkitGetAsEntry(): any;
+}
+
+declare var DataTransferItem: {
+    prototype: DataTransferItem;
+    new(): DataTransferItem;
+};
+
+interface DataTransferItemList {
+    readonly length: number;
+    add(data: File): DataTransferItem | null;
+    clear(): void;
+    item(index: number): DataTransferItem;
+    remove(index: number): void;
+    [index: number]: DataTransferItem;
+}
+
+declare var DataTransferItemList: {
+    prototype: DataTransferItemList;
+    new(): DataTransferItemList;
+};
+
+interface DeferredPermissionRequest {
+    readonly id: number;
+    readonly type: MSWebViewPermissionType;
+    readonly uri: string;
+    allow(): void;
+    deny(): void;
+}
+
+declare var DeferredPermissionRequest: {
+    prototype: DeferredPermissionRequest;
+    new(): DeferredPermissionRequest;
+};
+
+interface DelayNode extends AudioNode {
+    readonly delayTime: AudioParam;
+}
+
+declare var DelayNode: {
+    prototype: DelayNode;
+    new(): DelayNode;
+};
+
+interface DeviceAcceleration {
+    readonly x: number | null;
+    readonly y: number | null;
+    readonly z: number | null;
+}
+
+declare var DeviceAcceleration: {
+    prototype: DeviceAcceleration;
+    new(): DeviceAcceleration;
+};
+
+interface DeviceLightEvent extends Event {
+    readonly value: number;
+}
+
+declare var DeviceLightEvent: {
+    prototype: DeviceLightEvent;
+    new(typeArg: string, eventInitDict?: DeviceLightEventInit): DeviceLightEvent;
+};
+
+interface DeviceMotionEvent extends Event {
+    readonly acceleration: DeviceAcceleration | null;
+    readonly accelerationIncludingGravity: DeviceAcceleration | null;
+    readonly interval: number | null;
+    readonly rotationRate: DeviceRotationRate | null;
+    initDeviceMotionEvent(type: string, bubbles: boolean, cancelable: boolean, acceleration: DeviceAccelerationDict | null, accelerationIncludingGravity: DeviceAccelerationDict | null, rotationRate: DeviceRotationRateDict | null, interval: number | null): void;
+}
+
+declare var DeviceMotionEvent: {
+    prototype: DeviceMotionEvent;
+    new(typeArg: string, eventInitDict?: DeviceMotionEventInit): DeviceMotionEvent;
+};
+
+interface DeviceOrientationEvent extends Event {
+    readonly absolute: boolean;
+    readonly alpha: number | null;
+    readonly beta: number | null;
+    readonly gamma: number | null;
+    initDeviceOrientationEvent(type: string, bubbles: boolean, cancelable: boolean, alpha: number | null, beta: number | null, gamma: number | null, absolute: boolean): void;
+}
+
+declare var DeviceOrientationEvent: {
+    prototype: DeviceOrientationEvent;
+    new(typeArg: string, eventInitDict?: DeviceOrientationEventInit): DeviceOrientationEvent;
+};
+
+interface DeviceRotationRate {
+    readonly alpha: number | null;
+    readonly beta: number | null;
+    readonly gamma: number | null;
+}
+
+declare var DeviceRotationRate: {
+    prototype: DeviceRotationRate;
+    new(): DeviceRotationRate;
+};
+
+interface DocumentEventMap extends GlobalEventHandlersEventMap {
+    "abort": UIEvent;
+    "activate": UIEvent;
+    "beforeactivate": UIEvent;
+    "beforedeactivate": UIEvent;
+    "blur": FocusEvent;
+    "canplay": Event;
+    "canplaythrough": Event;
+    "change": Event;
+    "click": MouseEvent;
+    "contextmenu": PointerEvent;
+    "dblclick": MouseEvent;
+    "deactivate": UIEvent;
+    "drag": DragEvent;
+    "dragend": DragEvent;
+    "dragenter": DragEvent;
+    "dragleave": DragEvent;
+    "dragover": DragEvent;
+    "dragstart": DragEvent;
+    "drop": DragEvent;
+    "durationchange": Event;
+    "emptied": Event;
+    "ended": MediaStreamErrorEvent;
+    "error": ErrorEvent;
+    "focus": FocusEvent;
+    "fullscreenchange": Event;
+    "fullscreenerror": Event;
+    "input": Event;
+    "invalid": Event;
+    "keydown": KeyboardEvent;
+    "keypress": KeyboardEvent;
+    "keyup": KeyboardEvent;
+    "load": Event;
+    "loadeddata": Event;
+    "loadedmetadata": Event;
+    "loadstart": Event;
+    "mousedown": MouseEvent;
+    "mousemove": MouseEvent;
+    "mouseout": MouseEvent;
+    "mouseover": MouseEvent;
+    "mouseup": MouseEvent;
+    "mousewheel": WheelEvent;
+    "MSContentZoom": UIEvent;
+    "MSGestureChange": MSGestureEvent;
+    "MSGestureDoubleTap": MSGestureEvent;
+    "MSGestureEnd": MSGestureEvent;
+    "MSGestureHold": MSGestureEvent;
+    "MSGestureStart": MSGestureEvent;
+    "MSGestureTap": MSGestureEvent;
+    "MSInertiaStart": MSGestureEvent;
+    "MSManipulationStateChanged": MSManipulationEvent;
+    "MSPointerCancel": MSPointerEvent;
+    "MSPointerDown": MSPointerEvent;
+    "MSPointerEnter": MSPointerEvent;
+    "MSPointerLeave": MSPointerEvent;
+    "MSPointerMove": MSPointerEvent;
+    "MSPointerOut": MSPointerEvent;
+    "MSPointerOver": MSPointerEvent;
+    "MSPointerUp": MSPointerEvent;
+    "mssitemodejumplistitemremoved": MSSiteModeEvent;
+    "msthumbnailclick": MSSiteModeEvent;
+    "pause": Event;
+    "play": Event;
+    "playing": Event;
+    "pointerlockchange": Event;
+    "pointerlockerror": Event;
+    "progress": ProgressEvent;
+    "ratechange": Event;
+    "readystatechange": Event;
+    "reset": Event;
+    "scroll": UIEvent;
+    "seeked": Event;
+    "seeking": Event;
+    "select": UIEvent;
+    "selectionchange": Event;
+    "selectstart": Event;
+    "stalled": Event;
+    "stop": Event;
+    "submit": Event;
+    "suspend": Event;
+    "timeupdate": Event;
+    "touchcancel": TouchEvent;
+    "touchend": TouchEvent;
+    "touchmove": TouchEvent;
+    "touchstart": TouchEvent;
+    "volumechange": Event;
+    "waiting": Event;
+    "webkitfullscreenchange": Event;
+    "webkitfullscreenerror": Event;
+}
+
+interface Document extends Node, GlobalEventHandlers, NodeSelector, DocumentEvent, ParentNode, DocumentOrShadowRoot {
+    /**
+     * Gets the object that has the focus when the parent document has focus.
+     */
+    readonly activeElement: Element;
+    /**
+     * Sets or gets the color of all active links in the document.
+     */
+    alinkColor: string;
+    /**
+     * Returns a reference to the collection of elements contained by the object.
+     */
+    readonly all: HTMLAllCollection;
+    /**
+     * Retrieves a collection of all a objects that have a name and/or id property. Objects in this collection are in HTML source order.
+     */
+    anchors: HTMLCollectionOf<HTMLAnchorElement>;
+    /**
+     * Retrieves a collection of all applet objects in the document.
+     */
+    applets: HTMLCollectionOf<HTMLAppletElement>;
+    /**
+     * Deprecated. Sets or retrieves a value that indicates the background color behind the object.
+     */
+    bgColor: string;
+    /**
+     * Specifies the beginning and end of the document body.
+     */
+    body: HTMLElement;
+    readonly characterSet: string;
+    /**
+     * Gets or sets the character set used to encode the object.
+     */
+    charset: string;
+    /**
+     * Gets a value that indicates whether standards-compliant mode is switched on for the object.
+     */
+    readonly compatMode: string;
+    cookie: string;
+    readonly currentScript: HTMLScriptElement | SVGScriptElement;
+    readonly defaultView: Window;
+    /**
+     * Sets or gets a value that indicates whether the document can be edited.
+     */
+    designMode: string;
+    /**
+     * Sets or retrieves a value that indicates the reading order of the object.
+     */
+    dir: string;
+    /**
+     * Gets an object representing the document type declaration associated with the current document.
+     */
+    readonly doctype: DocumentType;
+    /**
+     * Gets a reference to the root node of the document.
+     */
+    documentElement: HTMLElement;
+    /**
+     * Sets or gets the security domain of the document.
+     */
+    domain: string;
+    /**
+     * Retrieves a collection of all embed objects in the document.
+     */
+    embeds: HTMLCollectionOf<HTMLEmbedElement>;
+    /**
+     * Sets or gets the foreground (text) color of the document.
+     */
+    fgColor: string;
+    /**
+     * Retrieves a collection, in source order, of all form objects in the document.
+     */
+    forms: HTMLCollectionOf<HTMLFormElement>;
+    readonly fullscreenElement: Element | null;
+    readonly fullscreenEnabled: boolean;
+    readonly head: HTMLHeadElement;
+    readonly hidden: boolean;
+    /**
+     * Retrieves a collection, in source order, of img objects in the document.
+     */
+    images: HTMLCollectionOf<HTMLImageElement>;
+    /**
+     * Gets the implementation object of the current document.
+     */
+    readonly implementation: DOMImplementation;
+    /**
+     * Returns the character encoding used to create the webpage that is loaded into the document object.
+     */
+    readonly inputEncoding: string | null;
+    /**
+     * Gets the date that the page was last modified, if the page supplies one.
+     */
+    readonly lastModified: string;
+    /**
+     * Sets or gets the color of the document links.
+     */
+    linkColor: string;
+    /**
+     * Retrieves a collection of all a objects that specify the href property and all area objects in the document.
+     */
+    links: HTMLCollectionOf<HTMLAnchorElement | HTMLAreaElement>;
+    /**
+     * Contains information about the current URL.
+     */
+    readonly location: Location;
+    msCapsLockWarningOff: boolean;
+    msCSSOMElementFloatMetrics: boolean;
+    /**
+     * Fires when the user aborts the download.
+     * @param ev The event.
+     */
+    onabort: (this: Document, ev: UIEvent) => any;
+    /**
+     * Fires when the object is set as the active element.
+     * @param ev The event.
+     */
+    onactivate: (this: Document, ev: UIEvent) => any;
+    /**
+     * Fires immediately before the object is set as the active element.
+     * @param ev The event.
+     */
+    onbeforeactivate: (this: Document, ev: UIEvent) => any;
+    /**
+     * Fires immediately before the activeElement is changed from the current object to another object in the parent document.
+     * @param ev The event.
+     */
+    onbeforedeactivate: (this: Document, ev: UIEvent) => any;
+    /**
+     * Fires when the object loses the input focus.
+     * @param ev The focus event.
+     */
+    onblur: (this: Document, ev: FocusEvent) => any;
+    /**
+     * Occurs when playback is possible, but would require further buffering.
+     * @param ev The event.
+     */
+    oncanplay: (this: Document, ev: Event) => any;
+    oncanplaythrough: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the contents of the object or selection have changed.
+     * @param ev The event.
+     */
+    onchange: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the user clicks the left mouse button on the object
+     * @param ev The mouse event.
+     */
+    onclick: (this: Document, ev: MouseEvent) => any;
+    /**
+     * Fires when the user clicks the right mouse button in the client area, opening the context menu.
+     * @param ev The mouse event.
+     */
+    oncontextmenu: (this: Document, ev: PointerEvent) => any;
+    /**
+     * Fires when the user double-clicks the object.
+     * @param ev The mouse event.
+     */
+    ondblclick: (this: Document, ev: MouseEvent) => any;
+    /**
+     * Fires when the activeElement is changed from the current object to another object in the parent document.
+     * @param ev The UI Event
+     */
+    ondeactivate: (this: Document, ev: UIEvent) => any;
+    /**
+     * Fires on the source object continuously during a drag operation.
+     * @param ev The event.
+     */
+    ondrag: (this: Document, ev: DragEvent) => any;
+    /**
+     * Fires on the source object when the user releases the mouse at the close of a drag operation.
+     * @param ev The event.
+     */
+    ondragend: (this: Document, ev: DragEvent) => any;
+    /**
+     * Fires on the target element when the user drags the object to a valid drop target.
+     * @param ev The drag event.
+     */
+    ondragenter: (this: Document, ev: DragEvent) => any;
+    /**
+     * Fires on the target object when the user moves the mouse out of a valid drop target during a drag operation.
+     * @param ev The drag event.
+     */
+    ondragleave: (this: Document, ev: DragEvent) => any;
+    /**
+     * Fires on the target element continuously while the user drags the object over a valid drop target.
+     * @param ev The event.
+     */
+    ondragover: (this: Document, ev: DragEvent) => any;
+    /**
+     * Fires on the source object when the user starts to drag a text selection or selected object.
+     * @param ev The event.
+     */
+    ondragstart: (this: Document, ev: DragEvent) => any;
+    ondrop: (this: Document, ev: DragEvent) => any;
+    /**
+     * Occurs when the duration attribute is updated.
+     * @param ev The event.
+     */
+    ondurationchange: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when the media element is reset to its initial state.
+     * @param ev The event.
+     */
+    onemptied: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when the end of playback is reached.
+     * @param ev The event
+     */
+    onended: (this: Document, ev: MediaStreamErrorEvent) => any;
+    /**
+     * Fires when an error occurs during object loading.
+     * @param ev The event.
+     */
+    onerror: (this: Document, ev: ErrorEvent) => any;
+    /**
+     * Fires when the object receives focus.
+     * @param ev The event.
+     */
+    onfocus: (this: Document, ev: FocusEvent) => any;
+    onfullscreenchange: (this: Document, ev: Event) => any;
+    onfullscreenerror: (this: Document, ev: Event) => any;
+    oninput: (this: Document, ev: Event) => any;
+    oninvalid: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the user presses a key.
+     * @param ev The keyboard event
+     */
+    onkeydown: (this: Document, ev: KeyboardEvent) => any;
+    /**
+     * Fires when the user presses an alphanumeric key.
+     * @param ev The event.
+     */
+    onkeypress: (this: Document, ev: KeyboardEvent) => any;
+    /**
+     * Fires when the user releases a key.
+     * @param ev The keyboard event
+     */
+    onkeyup: (this: Document, ev: KeyboardEvent) => any;
+    /**
+     * Fires immediately after the browser loads the object.
+     * @param ev The event.
+     */
+    onload: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when media data is loaded at the current playback position.
+     * @param ev The event.
+     */
+    onloadeddata: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when the duration and dimensions of the media have been determined.
+     * @param ev The event.
+     */
+    onloadedmetadata: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when Internet Explorer begins looking for media data.
+     * @param ev The event.
+     */
+    onloadstart: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the user clicks the object with either mouse button.
+     * @param ev The mouse event.
+     */
+    onmousedown: (this: Document, ev: MouseEvent) => any;
+    /**
+     * Fires when the user moves the mouse over the object.
+     * @param ev The mouse event.
+     */
+    onmousemove: (this: Document, ev: MouseEvent) => any;
+    /**
+     * Fires when the user moves the mouse pointer outside the boundaries of the object.
+     * @param ev The mouse event.
+     */
+    onmouseout: (this: Document, ev: MouseEvent) => any;
+    /**
+     * Fires when the user moves the mouse pointer into the object.
+     * @param ev The mouse event.
+     */
+    onmouseover: (this: Document, ev: MouseEvent) => any;
+    /**
+     * Fires when the user releases a mouse button while the mouse is over the object.
+     * @param ev The mouse event.
+     */
+    onmouseup: (this: Document, ev: MouseEvent) => any;
+    /**
+     * Fires when the wheel button is rotated.
+     * @param ev The mouse event
+     */
+    onmousewheel: (this: Document, ev: WheelEvent) => any;
+    onmscontentzoom: (this: Document, ev: UIEvent) => any;
+    onmsgesturechange: (this: Document, ev: MSGestureEvent) => any;
+    onmsgesturedoubletap: (this: Document, ev: MSGestureEvent) => any;
+    onmsgestureend: (this: Document, ev: MSGestureEvent) => any;
+    onmsgesturehold: (this: Document, ev: MSGestureEvent) => any;
+    onmsgesturestart: (this: Document, ev: MSGestureEvent) => any;
+    onmsgesturetap: (this: Document, ev: MSGestureEvent) => any;
+    onmsinertiastart: (this: Document, ev: MSGestureEvent) => any;
+    onmsmanipulationstatechanged: (this: Document, ev: MSManipulationEvent) => any;
+    onmspointercancel: (this: Document, ev: MSPointerEvent) => any;
+    onmspointerdown: (this: Document, ev: MSPointerEvent) => any;
+    onmspointerenter: (this: Document, ev: MSPointerEvent) => any;
+    onmspointerleave: (this: Document, ev: MSPointerEvent) => any;
+    onmspointermove: (this: Document, ev: MSPointerEvent) => any;
+    onmspointerout: (this: Document, ev: MSPointerEvent) => any;
+    onmspointerover: (this: Document, ev: MSPointerEvent) => any;
+    onmspointerup: (this: Document, ev: MSPointerEvent) => any;
+    /**
+     * Occurs when an item is removed from a Jump List of a webpage running in Site Mode.
+     * @param ev The event.
+     */
+    onmssitemodejumplistitemremoved: (this: Document, ev: MSSiteModeEvent) => any;
+    /**
+     * Occurs when a user clicks a button in a Thumbnail Toolbar of a webpage running in Site Mode.
+     * @param ev The event.
+     */
+    onmsthumbnailclick: (this: Document, ev: MSSiteModeEvent) => any;
+    /**
+     * Occurs when playback is paused.
+     * @param ev The event.
+     */
+    onpause: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when the play method is requested.
+     * @param ev The event.
+     */
+    onplay: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when the audio or video has started playing.
+     * @param ev The event.
+     */
+    onplaying: (this: Document, ev: Event) => any;
+    onpointerlockchange: (this: Document, ev: Event) => any;
+    onpointerlockerror: (this: Document, ev: Event) => any;
+    /**
+     * Occurs to indicate progress while downloading media data.
+     * @param ev The event.
+     */
+    onprogress: (this: Document, ev: ProgressEvent) => any;
+    /**
+     * Occurs when the playback rate is increased or decreased.
+     * @param ev The event.
+     */
+    onratechange: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the state of the object has changed.
+     * @param ev The event
+     */
+    onreadystatechange: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the user resets a form.
+     * @param ev The event.
+     */
+    onreset: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the user repositions the scroll box in the scroll bar on the object.
+     * @param ev The event.
+     */
+    onscroll: (this: Document, ev: UIEvent) => any;
+    /**
+     * Occurs when the seek operation ends.
+     * @param ev The event.
+     */
+    onseeked: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when the current playback position is moved.
+     * @param ev The event.
+     */
+    onseeking: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the current selection changes.
+     * @param ev The event.
+     */
+    onselect: (this: Document, ev: UIEvent) => any;
+    /**
+     * Fires when the selection state of a document changes.
+     * @param ev The event.
+     */
+    onselectionchange: (this: Document, ev: Event) => any;
+    onselectstart: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when the download has stopped.
+     * @param ev The event.
+     */
+    onstalled: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the user clicks the Stop button or leaves the Web page.
+     * @param ev The event.
+     */
+    onstop: (this: Document, ev: Event) => any;
+    onsubmit: (this: Document, ev: Event) => any;
+    /**
+     * Occurs if the load operation has been intentionally halted.
+     * @param ev The event.
+     */
+    onsuspend: (this: Document, ev: Event) => any;
+    /**
+     * Occurs to indicate the current playback position.
+     * @param ev The event.
+     */
+    ontimeupdate: (this: Document, ev: Event) => any;
+    ontouchcancel: (ev: TouchEvent) => any;
+    ontouchend: (ev: TouchEvent) => any;
+    ontouchmove: (ev: TouchEvent) => any;
+    ontouchstart: (ev: TouchEvent) => any;
+    /**
+     * Occurs when the volume is changed, or playback is muted or unmuted.
+     * @param ev The event.
+     */
+    onvolumechange: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when playback stops because the next frame of a video resource is not available.
+     * @param ev The event.
+     */
+    onwaiting: (this: Document, ev: Event) => any;
+    onwebkitfullscreenchange: (this: Document, ev: Event) => any;
+    onwebkitfullscreenerror: (this: Document, ev: Event) => any;
+    plugins: HTMLCollectionOf<HTMLEmbedElement>;
+    readonly pointerLockElement: Element;
+    /**
+     * Retrieves a value that indicates the current state of the object.
+     */
+    readonly readyState: string;
+    /**
+     * Gets the URL of the location that referred the user to the current page.
+     */
+    readonly referrer: string;
+    /**
+     * Gets the root svg element in the document hierarchy.
+     */
+    readonly rootElement: SVGSVGElement;
+    /**
+     * Retrieves a collection of all script objects in the document.
+     */
+    scripts: HTMLCollectionOf<HTMLScriptElement>;
+    readonly scrollingElement: Element | null;
+    /**
+     * Retrieves a collection of styleSheet objects representing the style sheets that correspond to each instance of a link or style object in the document.
+     */
+    readonly styleSheets: StyleSheetList;
+    /**
+     * Contains the title of the document.
+     */
+    title: string;
+    /**
+     * Sets or gets the URL for the current document.
+     */
+    readonly URL: string;
+    /**
+     * Gets the URL for the document, stripped of any character encoding.
+     */
+    readonly URLUnencoded: string;
+    readonly visibilityState: VisibilityState;
+    /**
+     * Sets or gets the color of the links that the user has visited.
+     */
+    vlinkColor: string;
+    readonly webkitCurrentFullScreenElement: Element | null;
+    readonly webkitFullscreenElement: Element | null;
+    readonly webkitFullscreenEnabled: boolean;
+    readonly webkitIsFullScreen: boolean;
+    readonly xmlEncoding: string | null;
+    xmlStandalone: boolean;
+    /**
+     * Gets or sets the version attribute specified in the declaration of an XML document.
+     */
+    xmlVersion: string | null;
+    adoptNode<T extends Node>(source: T): T;
+    captureEvents(): void;
+    caretRangeFromPoint(x: number, y: number): Range;
+    clear(): void;
+    /**
+     * Closes an output stream and forces the sent data to display.
+     */
+    close(): void;
+    /**
+     * Creates an attribute object with a specified name.
+     * @param name String that sets the attribute object's name.
+     */
+    createAttribute(name: string): Attr;
+    createAttributeNS(namespaceURI: string | null, qualifiedName: string): Attr;
+    createCDATASection(data: string): CDATASection;
+    /**
+     * Creates a comment object with the specified data.
+     * @param data Sets the comment object's data.
+     */
+    createComment(data: string): Comment;
+    /**
+     * Creates a new document.
+     */
+    createDocumentFragment(): DocumentFragment;
+    /**
+     * Creates an instance of the element for the specified tag.
+     * @param tagName The name of an element.
+     */
+    createElement<K extends keyof HTMLElementTagNameMap>(tagName: K): HTMLElementTagNameMap[K];
+    createElement(tagName: string): HTMLElement;
+    createElementNS(namespaceURI: "http://www.w3.org/1999/xhtml", qualifiedName: string): HTMLElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "a"): SVGAElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "circle"): SVGCircleElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "clipPath"): SVGClipPathElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "componentTransferFunction"): SVGComponentTransferFunctionElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "defs"): SVGDefsElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "desc"): SVGDescElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "ellipse"): SVGEllipseElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feBlend"): SVGFEBlendElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feColorMatrix"): SVGFEColorMatrixElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feComponentTransfer"): SVGFEComponentTransferElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feComposite"): SVGFECompositeElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feConvolveMatrix"): SVGFEConvolveMatrixElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feDiffuseLighting"): SVGFEDiffuseLightingElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feDisplacementMap"): SVGFEDisplacementMapElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feDistantLight"): SVGFEDistantLightElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feFlood"): SVGFEFloodElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feFuncA"): SVGFEFuncAElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feFuncB"): SVGFEFuncBElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feFuncG"): SVGFEFuncGElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feFuncR"): SVGFEFuncRElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feGaussianBlur"): SVGFEGaussianBlurElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feImage"): SVGFEImageElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feMerge"): SVGFEMergeElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feMergeNode"): SVGFEMergeNodeElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feMorphology"): SVGFEMorphologyElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feOffset"): SVGFEOffsetElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "fePointLight"): SVGFEPointLightElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feSpecularLighting"): SVGFESpecularLightingElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feSpotLight"): SVGFESpotLightElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feTile"): SVGFETileElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feTurbulence"): SVGFETurbulenceElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "filter"): SVGFilterElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "foreignObject"): SVGForeignObjectElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "g"): SVGGElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "image"): SVGImageElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "gradient"): SVGGradientElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "line"): SVGLineElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "linearGradient"): SVGLinearGradientElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "marker"): SVGMarkerElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "mask"): SVGMaskElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "path"): SVGPathElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "metadata"): SVGMetadataElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "pattern"): SVGPatternElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "polygon"): SVGPolygonElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "polyline"): SVGPolylineElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "radialGradient"): SVGRadialGradientElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "rect"): SVGRectElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "svg"): SVGSVGElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "script"): SVGScriptElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "stop"): SVGStopElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "style"): SVGStyleElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "switch"): SVGSwitchElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "symbol"): SVGSymbolElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "tspan"): SVGTSpanElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "textContent"): SVGTextContentElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "text"): SVGTextElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "textPath"): SVGTextPathElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "textPositioning"): SVGTextPositioningElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "title"): SVGTitleElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "use"): SVGUseElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "view"): SVGViewElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: string): SVGElement;
+    createElementNS(namespaceURI: string | null, qualifiedName: string): Element;
+    createExpression(expression: string, resolver: XPathNSResolver): XPathExpression;
+    /**
+     * Creates a NodeIterator object that you can use to traverse filtered lists of nodes or elements in a document.
+     * @param root The root element or node to start traversing on.
+     * @param whatToShow The type of nodes or elements to appear in the node list
+     * @param filter A custom NodeFilter function to use. For more information, see filter. Use null for no filter.
+     * @param entityReferenceExpansion A flag that specifies whether entity reference nodes are expanded.
+     */
+    createNodeIterator(root: Node, whatToShow?: number, filter?: NodeFilter, entityReferenceExpansion?: boolean): NodeIterator;
+    createNSResolver(nodeResolver: Node): XPathNSResolver;
+    createProcessingInstruction(target: string, data: string): ProcessingInstruction;
+    /**
+     *  Returns an empty range object that has both of its boundary points positioned at the beginning of the document.
+     */
+    createRange(): Range;
+    /**
+     * Creates a text string from the specified value.
+     * @param data String that specifies the nodeValue property of the text node.
+     */
+    createTextNode(data: string): Text;
+    createTouch(view: Window, target: EventTarget, identifier: number, pageX: number, pageY: number, screenX: number, screenY: number): Touch;
+    createTouchList(...touches: Touch[]): TouchList;
+    /**
+     * Creates a TreeWalker object that you can use to traverse filtered lists of nodes or elements in a document.
+     * @param root The root element or node to start traversing on.
+     * @param whatToShow The type of nodes or elements to appear in the node list. For more information, see whatToShow.
+     * @param filter A custom NodeFilter function to use.
+     * @param entityReferenceExpansion A flag that specifies whether entity reference nodes are expanded.
+     */
+    createTreeWalker(root: Node, whatToShow?: number, filter?: NodeFilter, entityReferenceExpansion?: boolean): TreeWalker;
+    /**
+     * Returns the element for the specified x coordinate and the specified y coordinate.
+     * @param x The x-offset
+     * @param y The y-offset
+     */
+    elementFromPoint(x: number, y: number): Element;
+    evaluate(expression: string, contextNode: Node, resolver: XPathNSResolver | null, type: number, result: XPathResult | null): XPathResult;
+    /**
+     * Executes a command on the current document, current selection, or the given range.
+     * @param commandId String that specifies the command to execute. This command can be any of the command identifiers that can be executed in script.
+     * @param showUI Display the user interface, defaults to false.
+     * @param value Value to assign.
+     */
+    execCommand(commandId: string, showUI?: boolean, value?: any): boolean;
+    /**
+     * Displays help information for the given command identifier.
+     * @param commandId Displays help information for the given command identifier.
+     */
+    execCommandShowHelp(commandId: string): boolean;
+    exitFullscreen(): void;
+    exitPointerLock(): void;
+    /**
+     * Causes the element to receive the focus and executes the code specified by the onfocus event.
+     */
+    focus(): void;
+    /**
+     * Returns a reference to the first object with the specified value of the ID or NAME attribute.
+     * @param elementId String that specifies the ID value. Case-insensitive.
+     */
+    getElementById(elementId: string): HTMLElement | null;
+    getElementsByClassName(classNames: string): HTMLCollectionOf<Element>;
+    /**
+     * Gets a collection of objects based on the value of the NAME or ID attribute.
+     * @param elementName Gets a collection of objects based on the value of the NAME or ID attribute.
+     */
+    getElementsByName(elementName: string): NodeListOf<HTMLElement>;
+    /**
+     * Retrieves a collection of objects based on the specified element name.
+     * @param name Specifies the name of an element.
+     */
+    getElementsByTagName<K extends keyof ElementListTagNameMap>(tagname: K): ElementListTagNameMap[K];
+    getElementsByTagName(tagname: string): NodeListOf<Element>;
+    getElementsByTagNameNS(namespaceURI: "http://www.w3.org/1999/xhtml", localName: string): HTMLCollectionOf<HTMLElement>;
+    getElementsByTagNameNS(namespaceURI: "http://www.w3.org/2000/svg", localName: string): HTMLCollectionOf<SVGElement>;
+    getElementsByTagNameNS(namespaceURI: string, localName: string): HTMLCollectionOf<Element>;
+    /**
+     * Returns an object representing the current selection of the document that is loaded into the object displaying a webpage.
+     */
+    getSelection(): Selection;
+    /**
+     * Gets a value indicating whether the object currently has focus.
+     */
+    hasFocus(): boolean;
+    importNode<T extends Node>(importedNode: T, deep: boolean): T;
+    msElementsFromPoint(x: number, y: number): NodeListOf<Element>;
+    msElementsFromRect(left: number, top: number, width: number, height: number): NodeListOf<Element>;
+    /**
+     * Opens a new window and loads a document specified by a given URL. Also, opens a new window that uses the url parameter and the name parameter to collect the output of the write method and the writeln method.
+     * @param url Specifies a MIME type for the document.
+     * @param name Specifies the name of the window. This name is used as the value for the TARGET attribute on a form or an anchor element.
+     * @param features Contains a list of items separated by commas. Each item consists of an option and a value, separated by an equals sign (for example, "fullscreen=yes, toolbar=yes"). The following values are supported.
+     * @param replace Specifies whether the existing entry for the document is replaced in the history list.
+     */
+    open(url?: string, name?: string, features?: string, replace?: boolean): Document;
+    /**
+     * Returns a Boolean value that indicates whether a specified command can be successfully executed using execCommand, given the current state of the document.
+     * @param commandId Specifies a command identifier.
+     */
+    queryCommandEnabled(commandId: string): boolean;
+    /**
+     * Returns a Boolean value that indicates whether the specified command is in the indeterminate state.
+     * @param commandId String that specifies a command identifier.
+     */
+    queryCommandIndeterm(commandId: string): boolean;
+    /**
+     * Returns a Boolean value that indicates the current state of the command.
+     * @param commandId String that specifies a command identifier.
+     */
+    queryCommandState(commandId: string): boolean;
+    /**
+     * Returns a Boolean value that indicates whether the current command is supported on the current range.
+     * @param commandId Specifies a command identifier.
+     */
+    queryCommandSupported(commandId: string): boolean;
+    /**
+     * Retrieves the string associated with a command.
+     * @param commandId String that contains the identifier of a command. This can be any command identifier given in the list of Command Identifiers.
+     */
+    queryCommandText(commandId: string): string;
+    /**
+     * Returns the current value of the document, range, or current selection for the given command.
+     * @param commandId String that specifies a command identifier.
+     */
+    queryCommandValue(commandId: string): string;
+    releaseEvents(): void;
+    /**
+     * Allows updating the print settings for the page.
+     */
+    updateSettings(): void;
+    webkitCancelFullScreen(): void;
+    webkitExitFullscreen(): void;
+    /**
+     * Writes one or more HTML expressions to a document in the specified window.
+     * @param content Specifies the text and HTML tags to write.
+     */
+    write(...content: string[]): void;
+    /**
+     * Writes one or more HTML expressions, followed by a carriage return, to a document in the specified window.
+     * @param content The text and HTML tags to write.
+     */
+    writeln(...content: string[]): void;
+    addEventListener<K extends keyof DocumentEventMap>(type: K, listener: (this: Document, ev: DocumentEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var Document: {
+    prototype: Document;
+    new(): Document;
+};
+
+interface DocumentFragment extends Node, NodeSelector, ParentNode {
+    getElementById(elementId: string): HTMLElement | null;
+}
+
+declare var DocumentFragment: {
+    prototype: DocumentFragment;
+    new(): DocumentFragment;
+};
+
+interface DocumentType extends Node, ChildNode {
+    readonly entities: NamedNodeMap;
+    readonly internalSubset: string | null;
+    readonly name: string;
+    readonly notations: NamedNodeMap;
+    readonly publicId: string;
+    readonly systemId: string;
+}
+
+declare var DocumentType: {
+    prototype: DocumentType;
+    new(): DocumentType;
+};
+
+interface DOMError {
+    readonly name: string;
+    toString(): string;
+}
+
+declare var DOMError: {
+    prototype: DOMError;
+    new(): DOMError;
+};
+
+interface DOMException {
+    readonly code: number;
+    readonly message: string;
+    readonly name: string;
+    toString(): string;
+    readonly ABORT_ERR: number;
+    readonly DATA_CLONE_ERR: number;
+    readonly DOMSTRING_SIZE_ERR: number;
+    readonly HIERARCHY_REQUEST_ERR: number;
+    readonly INDEX_SIZE_ERR: number;
+    readonly INUSE_ATTRIBUTE_ERR: number;
+    readonly INVALID_ACCESS_ERR: number;
+    readonly INVALID_CHARACTER_ERR: number;
+    readonly INVALID_MODIFICATION_ERR: number;
+    readonly INVALID_NODE_TYPE_ERR: number;
+    readonly INVALID_STATE_ERR: number;
+    readonly NAMESPACE_ERR: number;
+    readonly NETWORK_ERR: number;
+    readonly NO_DATA_ALLOWED_ERR: number;
+    readonly NO_MODIFICATION_ALLOWED_ERR: number;
+    readonly NOT_FOUND_ERR: number;
+    readonly NOT_SUPPORTED_ERR: number;
+    readonly PARSE_ERR: number;
+    readonly QUOTA_EXCEEDED_ERR: number;
+    readonly SECURITY_ERR: number;
+    readonly SERIALIZE_ERR: number;
+    readonly SYNTAX_ERR: number;
+    readonly TIMEOUT_ERR: number;
+    readonly TYPE_MISMATCH_ERR: number;
+    readonly URL_MISMATCH_ERR: number;
+    readonly VALIDATION_ERR: number;
+    readonly WRONG_DOCUMENT_ERR: number;
+}
+
+declare var DOMException: {
+    prototype: DOMException;
+    new(): DOMException;
+    readonly ABORT_ERR: number;
+    readonly DATA_CLONE_ERR: number;
+    readonly DOMSTRING_SIZE_ERR: number;
+    readonly HIERARCHY_REQUEST_ERR: number;
+    readonly INDEX_SIZE_ERR: number;
+    readonly INUSE_ATTRIBUTE_ERR: number;
+    readonly INVALID_ACCESS_ERR: number;
+    readonly INVALID_CHARACTER_ERR: number;
+    readonly INVALID_MODIFICATION_ERR: number;
+    readonly INVALID_NODE_TYPE_ERR: number;
+    readonly INVALID_STATE_ERR: number;
+    readonly NAMESPACE_ERR: number;
+    readonly NETWORK_ERR: number;
+    readonly NO_DATA_ALLOWED_ERR: number;
+    readonly NO_MODIFICATION_ALLOWED_ERR: number;
+    readonly NOT_FOUND_ERR: number;
+    readonly NOT_SUPPORTED_ERR: number;
+    readonly PARSE_ERR: number;
+    readonly QUOTA_EXCEEDED_ERR: number;
+    readonly SECURITY_ERR: number;
+    readonly SERIALIZE_ERR: number;
+    readonly SYNTAX_ERR: number;
+    readonly TIMEOUT_ERR: number;
+    readonly TYPE_MISMATCH_ERR: number;
+    readonly URL_MISMATCH_ERR: number;
+    readonly VALIDATION_ERR: number;
+    readonly WRONG_DOCUMENT_ERR: number;
+};
+
+interface DOMImplementation {
+    createDocument(namespaceURI: string | null, qualifiedName: string | null, doctype: DocumentType | null): Document;
+    createDocumentType(qualifiedName: string, publicId: string, systemId: string): DocumentType;
+    createHTMLDocument(title: string): Document;
+    hasFeature(feature: string | null, version: string | null): boolean;
+}
+
+declare var DOMImplementation: {
+    prototype: DOMImplementation;
+    new(): DOMImplementation;
+};
+
+interface DOMParser {
+    parseFromString(source: string, mimeType: string): Document;
+}
+
+declare var DOMParser: {
+    prototype: DOMParser;
+    new(): DOMParser;
+};
+
+interface DOMSettableTokenList extends DOMTokenList {
+    value: string;
+}
+
+declare var DOMSettableTokenList: {
+    prototype: DOMSettableTokenList;
+    new(): DOMSettableTokenList;
+};
+
+interface DOMStringList {
+    readonly length: number;
+    contains(str: string): boolean;
+    item(index: number): string | null;
+    [index: number]: string;
+}
+
+declare var DOMStringList: {
+    prototype: DOMStringList;
+    new(): DOMStringList;
+};
+
+interface DOMStringMap {
+    [name: string]: string | undefined;
+}
+
+declare var DOMStringMap: {
+    prototype: DOMStringMap;
+    new(): DOMStringMap;
+};
+
+interface DOMTokenList {
+    readonly length: number;
+    add(...token: string[]): void;
+    contains(token: string): boolean;
+    item(index: number): string;
+    remove(...token: string[]): void;
+    toggle(token: string, force?: boolean): boolean;
+    toString(): string;
+    [index: number]: string;
+}
+
+declare var DOMTokenList: {
+    prototype: DOMTokenList;
+    new(): DOMTokenList;
+};
+
+interface DragEvent extends MouseEvent {
+    readonly dataTransfer: DataTransfer;
+    initDragEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, ctrlKeyArg: boolean, altKeyArg: boolean, shiftKeyArg: boolean, metaKeyArg: boolean, buttonArg: number, relatedTargetArg: EventTarget, dataTransferArg: DataTransfer): void;
+    msConvertURL(file: File, targetType: string, targetURL?: string): void;
+}
+
+declare var DragEvent: {
+    prototype: DragEvent;
+    new(type: "drag" | "dragend" | "dragenter" | "dragexit" | "dragleave" | "dragover" | "dragstart" | "drop", dragEventInit?: { dataTransfer?: DataTransfer }): DragEvent;
+};
+
+interface DynamicsCompressorNode extends AudioNode {
+    readonly attack: AudioParam;
+    readonly knee: AudioParam;
+    readonly ratio: AudioParam;
+    readonly reduction: number;
+    readonly release: AudioParam;
+    readonly threshold: AudioParam;
+}
+
+declare var DynamicsCompressorNode: {
+    prototype: DynamicsCompressorNode;
+    new(): DynamicsCompressorNode;
+};
+
+interface ElementEventMap extends GlobalEventHandlersEventMap {
+    "ariarequest": Event;
+    "command": Event;
+    "gotpointercapture": PointerEvent;
+    "lostpointercapture": PointerEvent;
+    "MSGestureChange": MSGestureEvent;
+    "MSGestureDoubleTap": MSGestureEvent;
+    "MSGestureEnd": MSGestureEvent;
+    "MSGestureHold": MSGestureEvent;
+    "MSGestureStart": MSGestureEvent;
+    "MSGestureTap": MSGestureEvent;
+    "MSGotPointerCapture": MSPointerEvent;
+    "MSInertiaStart": MSGestureEvent;
+    "MSLostPointerCapture": MSPointerEvent;
+    "MSPointerCancel": MSPointerEvent;
+    "MSPointerDown": MSPointerEvent;
+    "MSPointerEnter": MSPointerEvent;
+    "MSPointerLeave": MSPointerEvent;
+    "MSPointerMove": MSPointerEvent;
+    "MSPointerOut": MSPointerEvent;
+    "MSPointerOver": MSPointerEvent;
+    "MSPointerUp": MSPointerEvent;
+    "touchcancel": TouchEvent;
+    "touchend": TouchEvent;
+    "touchmove": TouchEvent;
+    "touchstart": TouchEvent;
+    "webkitfullscreenchange": Event;
+    "webkitfullscreenerror": Event;
+}
+
+interface Element extends Node, GlobalEventHandlers, ElementTraversal, NodeSelector, ChildNode, ParentNode {
+    readonly classList: DOMTokenList;
+    className: string;
+    readonly clientHeight: number;
+    readonly clientLeft: number;
+    readonly clientTop: number;
+    readonly clientWidth: number;
+    id: string;
+    innerHTML: string;
+    msContentZoomFactor: number;
+    readonly msRegionOverflow: string;
+    onariarequest: (this: Element, ev: Event) => any;
+    oncommand: (this: Element, ev: Event) => any;
+    ongotpointercapture: (this: Element, ev: PointerEvent) => any;
+    onlostpointercapture: (this: Element, ev: PointerEvent) => any;
+    onmsgesturechange: (this: Element, ev: MSGestureEvent) => any;
+    onmsgesturedoubletap: (this: Element, ev: MSGestureEvent) => any;
+    onmsgestureend: (this: Element, ev: MSGestureEvent) => any;
+    onmsgesturehold: (this: Element, ev: MSGestureEvent) => any;
+    onmsgesturestart: (this: Element, ev: MSGestureEvent) => any;
+    onmsgesturetap: (this: Element, ev: MSGestureEvent) => any;
+    onmsgotpointercapture: (this: Element, ev: MSPointerEvent) => any;
+    onmsinertiastart: (this: Element, ev: MSGestureEvent) => any;
+    onmslostpointercapture: (this: Element, ev: MSPointerEvent) => any;
+    onmspointercancel: (this: Element, ev: MSPointerEvent) => any;
+    onmspointerdown: (this: Element, ev: MSPointerEvent) => any;
+    onmspointerenter: (this: Element, ev: MSPointerEvent) => any;
+    onmspointerleave: (this: Element, ev: MSPointerEvent) => any;
+    onmspointermove: (this: Element, ev: MSPointerEvent) => any;
+    onmspointerout: (this: Element, ev: MSPointerEvent) => any;
+    onmspointerover: (this: Element, ev: MSPointerEvent) => any;
+    onmspointerup: (this: Element, ev: MSPointerEvent) => any;
+    ontouchcancel: (ev: TouchEvent) => any;
+    ontouchend: (ev: TouchEvent) => any;
+    ontouchmove: (ev: TouchEvent) => any;
+    ontouchstart: (ev: TouchEvent) => any;
+    onwebkitfullscreenchange: (this: Element, ev: Event) => any;
+    onwebkitfullscreenerror: (this: Element, ev: Event) => any;
+    outerHTML: string;
+    readonly prefix: string | null;
+    readonly scrollHeight: number;
+    scrollLeft: number;
+    scrollTop: number;
+    readonly scrollWidth: number;
+    readonly tagName: string;
+    readonly assignedSlot: HTMLSlotElement | null;
+    slot: string;
+    readonly shadowRoot: ShadowRoot | null;
+    getAttribute(name: string): string | null;
+    getAttributeNode(name: string): Attr;
+    getAttributeNodeNS(namespaceURI: string, localName: string): Attr;
+    getAttributeNS(namespaceURI: string, localName: string): string;
+    getBoundingClientRect(): ClientRect;
+    getClientRects(): ClientRectList;
+    getElementsByTagName<K extends keyof ElementListTagNameMap>(name: K): ElementListTagNameMap[K];
+    getElementsByTagName(name: string): NodeListOf<Element>;
+    getElementsByTagNameNS(namespaceURI: "http://www.w3.org/1999/xhtml", localName: string): HTMLCollectionOf<HTMLElement>;
+    getElementsByTagNameNS(namespaceURI: "http://www.w3.org/2000/svg", localName: string): HTMLCollectionOf<SVGElement>;
+    getElementsByTagNameNS(namespaceURI: string, localName: string): HTMLCollectionOf<Element>;
+    hasAttribute(name: string): boolean;
+    hasAttributeNS(namespaceURI: string, localName: string): boolean;
+    msGetRegionContent(): MSRangeCollection;
+    msGetUntransformedBounds(): ClientRect;
+    msMatchesSelector(selectors: string): boolean;
+    msReleasePointerCapture(pointerId: number): void;
+    msSetPointerCapture(pointerId: number): void;
+    msZoomTo(args: MsZoomToOptions): void;
+    releasePointerCapture(pointerId: number): void;
+    removeAttribute(qualifiedName: string): void;
+    removeAttributeNode(oldAttr: Attr): Attr;
+    removeAttributeNS(namespaceURI: string, localName: string): void;
+    requestFullscreen(): void;
+    requestPointerLock(): void;
+    setAttribute(name: string, value: string): void;
+    setAttributeNode(newAttr: Attr): Attr;
+    setAttributeNodeNS(newAttr: Attr): Attr;
+    setAttributeNS(namespaceURI: string, qualifiedName: string, value: string): void;
+    setPointerCapture(pointerId: number): void;
+    webkitMatchesSelector(selectors: string): boolean;
+    webkitRequestFullscreen(): void;
+    webkitRequestFullScreen(): void;
+    getElementsByClassName(classNames: string): NodeListOf<Element>;
+    matches(selector: string): boolean;
+    closest(selector: string): Element | null;
+    scrollIntoView(arg?: boolean | ScrollIntoViewOptions): void;
+    scroll(options?: ScrollToOptions): void;
+    scroll(x: number, y: number): void;
+    scrollTo(options?: ScrollToOptions): void;
+    scrollTo(x: number, y: number): void;
+    scrollBy(options?: ScrollToOptions): void;
+    scrollBy(x: number, y: number): void;
+    insertAdjacentElement(position: InsertPosition, insertedElement: Element): Element | null;
+    insertAdjacentHTML(where: InsertPosition, html: string): void;
+    insertAdjacentText(where: InsertPosition, text: string): void;
+    attachShadow(shadowRootInitDict: ShadowRootInit): ShadowRoot;
+    addEventListener<K extends keyof ElementEventMap>(type: K, listener: (this: Element, ev: ElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var Element: {
+    prototype: Element;
+    new(): Element;
+};
+
+interface ErrorEvent extends Event {
+    readonly colno: number;
+    readonly error: any;
+    readonly filename: string;
+    readonly lineno: number;
+    readonly message: string;
+    initErrorEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, messageArg: string, filenameArg: string, linenoArg: number): void;
+}
+
+declare var ErrorEvent: {
+    prototype: ErrorEvent;
+    new(type: string, errorEventInitDict?: ErrorEventInit): ErrorEvent;
+};
+
+interface Event {
+    readonly bubbles: boolean;
+    readonly cancelable: boolean;
+    cancelBubble: boolean;
+    readonly currentTarget: EventTarget;
+    readonly defaultPrevented: boolean;
+    readonly eventPhase: number;
+    readonly isTrusted: boolean;
+    returnValue: boolean;
+    readonly srcElement: Element | null;
+    readonly target: EventTarget;
+    readonly timeStamp: number;
+    readonly type: string;
+    readonly scoped: boolean;
+    initEvent(eventTypeArg: string, canBubbleArg: boolean, cancelableArg: boolean): void;
+    preventDefault(): void;
+    stopImmediatePropagation(): void;
+    stopPropagation(): void;
+    deepPath(): EventTarget[];
+    readonly AT_TARGET: number;
+    readonly BUBBLING_PHASE: number;
+    readonly CAPTURING_PHASE: number;
+}
+
+declare var Event: {
+    prototype: Event;
+    new(typeArg: string, eventInitDict?: EventInit): Event;
+    readonly AT_TARGET: number;
+    readonly BUBBLING_PHASE: number;
+    readonly CAPTURING_PHASE: number;
+};
+
+interface EventTarget {
+    addEventListener(type: string, listener?: EventListenerOrEventListenerObject, options?: boolean | AddEventListenerOptions): void;
+    dispatchEvent(evt: Event): boolean;
+    removeEventListener(type: string, listener?: EventListenerOrEventListenerObject, options?: boolean | EventListenerOptions): void;
+}
+
+declare var EventTarget: {
+    prototype: EventTarget;
+    new(): EventTarget;
+};
+
+interface EXT_frag_depth {
+}
+
+declare var EXT_frag_depth: {
+    prototype: EXT_frag_depth;
+    new(): EXT_frag_depth;
+};
+
+interface EXT_texture_filter_anisotropic {
+    readonly MAX_TEXTURE_MAX_ANISOTROPY_EXT: number;
+    readonly TEXTURE_MAX_ANISOTROPY_EXT: number;
+}
+
+declare var EXT_texture_filter_anisotropic: {
+    prototype: EXT_texture_filter_anisotropic;
+    new(): EXT_texture_filter_anisotropic;
+    readonly MAX_TEXTURE_MAX_ANISOTROPY_EXT: number;
+    readonly TEXTURE_MAX_ANISOTROPY_EXT: number;
+};
+
+interface ExtensionScriptApis {
+    extensionIdToShortId(extensionId: string): number;
+    fireExtensionApiTelemetry(functionName: string, isSucceeded: boolean, isSupported: boolean): void;
+    genericFunction(routerAddress: any, parameters?: string, callbackId?: number): void;
+    genericSynchronousFunction(functionId: number, parameters?: string): string;
+    getExtensionId(): string;
+    registerGenericFunctionCallbackHandler(callbackHandler: any): void;
+    registerGenericPersistentCallbackHandler(callbackHandler: any): void;
+}
+
+declare var ExtensionScriptApis: {
+    prototype: ExtensionScriptApis;
+    new(): ExtensionScriptApis;
+};
+
+interface External {
+}
+
+declare var External: {
+    prototype: External;
+    new(): External;
+};
+
+interface File extends Blob {
+    readonly lastModifiedDate: any;
+    readonly name: string;
+    readonly webkitRelativePath: string;
+}
+
+declare var File: {
+    prototype: File;
+    new (parts: (ArrayBuffer | ArrayBufferView | Blob | string)[], filename: string, properties?: FilePropertyBag): File;
+};
+
+interface FileList {
+    readonly length: number;
+    item(index: number): File;
+    [index: number]: File;
+}
+
+declare var FileList: {
+    prototype: FileList;
+    new(): FileList;
+};
+
+interface FileReader extends EventTarget, MSBaseReader {
+    readonly error: DOMError;
+    readAsArrayBuffer(blob: Blob): void;
+    readAsBinaryString(blob: Blob): void;
+    readAsDataURL(blob: Blob): void;
+    readAsText(blob: Blob, encoding?: string): void;
+    addEventListener<K extends keyof MSBaseReaderEventMap>(type: K, listener: (this: FileReader, ev: MSBaseReaderEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var FileReader: {
+    prototype: FileReader;
+    new(): FileReader;
+};
+
+interface FocusEvent extends UIEvent {
+    readonly relatedTarget: EventTarget;
+    initFocusEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, relatedTargetArg: EventTarget): void;
+}
+
+declare var FocusEvent: {
+    prototype: FocusEvent;
+    new(typeArg: string, eventInitDict?: FocusEventInit): FocusEvent;
+};
+
+interface FocusNavigationEvent extends Event {
+    readonly navigationReason: NavigationReason;
+    readonly originHeight: number;
+    readonly originLeft: number;
+    readonly originTop: number;
+    readonly originWidth: number;
+    requestFocus(): void;
+}
+
+declare var FocusNavigationEvent: {
+    prototype: FocusNavigationEvent;
+    new(type: string, eventInitDict?: FocusNavigationEventInit): FocusNavigationEvent;
+};
+
+interface FormData {
+    append(name: string, value: string | Blob, fileName?: string): void;
+    delete(name: string): void;
+    get(name: string): FormDataEntryValue | null;
+    getAll(name: string): FormDataEntryValue[];
+    has(name: string): boolean;
+    set(name: string, value: string | Blob, fileName?: string): void;
+}
+
+declare var FormData: {
+    prototype: FormData;
+    new (form?: HTMLFormElement): FormData;
+};
+
+interface GainNode extends AudioNode {
+    readonly gain: AudioParam;
+}
+
+declare var GainNode: {
+    prototype: GainNode;
+    new(): GainNode;
+};
+
+interface Gamepad {
+    readonly axes: number[];
+    readonly buttons: GamepadButton[];
+    readonly connected: boolean;
+    readonly id: string;
+    readonly index: number;
+    readonly mapping: string;
+    readonly timestamp: number;
+}
+
+declare var Gamepad: {
+    prototype: Gamepad;
+    new(): Gamepad;
+};
+
+interface GamepadButton {
+    readonly pressed: boolean;
+    readonly value: number;
+}
+
+declare var GamepadButton: {
+    prototype: GamepadButton;
+    new(): GamepadButton;
+};
+
+interface GamepadEvent extends Event {
+    readonly gamepad: Gamepad;
+}
+
+declare var GamepadEvent: {
+    prototype: GamepadEvent;
+    new(typeArg: string, eventInitDict?: GamepadEventInit): GamepadEvent;
+};
+
+interface Geolocation {
+    clearWatch(watchId: number): void;
+    getCurrentPosition(successCallback: PositionCallback, errorCallback?: PositionErrorCallback, options?: PositionOptions): void;
+    watchPosition(successCallback: PositionCallback, errorCallback?: PositionErrorCallback, options?: PositionOptions): number;
+}
+
+declare var Geolocation: {
+    prototype: Geolocation;
+    new(): Geolocation;
+};
+
+interface HashChangeEvent extends Event {
+    readonly newURL: string | null;
+    readonly oldURL: string | null;
+}
+
+declare var HashChangeEvent: {
+    prototype: HashChangeEvent;
+    new(typeArg: string, eventInitDict?: HashChangeEventInit): HashChangeEvent;
+};
+
+interface Headers {
+    append(name: string, value: string): void;
+    delete(name: string): void;
+    forEach(callback: ForEachCallback): void;
+    get(name: string): string | null;
+    has(name: string): boolean;
+    set(name: string, value: string): void;
+}
+
+declare var Headers: {
+    prototype: Headers;
+    new(init?: any): Headers;
+};
+
+interface History {
+    readonly length: number;
+    readonly state: any;
+    scrollRestoration: ScrollRestoration;
+    back(): void;
+    forward(): void;
+    go(delta?: number): void;
+    pushState(data: any, title: string, url?: string | null): void;
+    replaceState(data: any, title: string, url?: string | null): void;
+}
+
+declare var History: {
+    prototype: History;
+    new(): History;
+};
+
+interface HTMLAllCollection {
+    readonly length: number;
+    item(nameOrIndex?: string): HTMLCollection | Element | null;
+    namedItem(name: string): HTMLCollection | Element | null;
+    [index: number]: Element;
+}
+
+declare var HTMLAllCollection: {
+    prototype: HTMLAllCollection;
+    new(): HTMLAllCollection;
+};
+
+interface HTMLAnchorElement extends HTMLElement {
+    /**
+     * Sets or retrieves the character set used to encode the object.
+     */
+    charset: string;
+    /**
+     * Sets or retrieves the coordinates of the object.
+     */
+    coords: string;
+    download: string;
+    /**
+     * Contains the anchor portion of the URL including the hash sign (#).
+     */
+    hash: string;
+    /**
+     * Contains the hostname and port values of the URL.
+     */
+    host: string;
+    /**
+     * Contains the hostname of a URL.
+     */
+    hostname: string;
+    /**
+     * Sets or retrieves a destination URL or an anchor point.
+     */
+    href: string;
+    /**
+     * Sets or retrieves the language code of the object.
+     */
+    hreflang: string;
+    Methods: string;
+    readonly mimeType: string;
+    /**
+     * Sets or retrieves the shape of the object.
+     */
+    name: string;
+    readonly nameProp: string;
+    /**
+     * Contains the pathname of the URL.
+     */
+    pathname: string;
+    /**
+     * Sets or retrieves the port number associated with a URL.
+     */
+    port: string;
+    /**
+     * Contains the protocol of the URL.
+     */
+    protocol: string;
+    readonly protocolLong: string;
+    /**
+     * Sets or retrieves the relationship between the object and the destination of the link.
+     */
+    rel: string;
+    /**
+     * Sets or retrieves the relationship between the object and the destination of the link.
+     */
+    rev: string;
+    /**
+     * Sets or retrieves the substring of the href property that follows the question mark.
+     */
+    search: string;
+    /**
+     * Sets or retrieves the shape of the object.
+     */
+    shape: string;
+    /**
+     * Sets or retrieves the window or frame at which to target content.
+     */
+    target: string;
+    /**
+     * Retrieves or sets the text of the object as a string.
+     */
+    text: string;
+    type: string;
+    urn: string;
+    /**
+     * Returns a string representation of an object.
+     */
+    toString(): string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLAnchorElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLAnchorElement: {
+    prototype: HTMLAnchorElement;
+    new(): HTMLAnchorElement;
+};
+
+interface HTMLAppletElement extends HTMLElement {
+    align: string;
+    /**
+     * Sets or retrieves a text alternative to the graphic.
+     */
+    alt: string;
+    /**
+     * Gets or sets the optional alternative HTML script to execute if the object fails to load.
+     */
+    altHtml: string;
+    /**
+     * Sets or retrieves a character string that can be used to implement your own archive functionality for the object.
+     */
+    archive: string;
+    /**
+     * Retrieves a string of the URL where the object tag can be found. This is often the href of the document that the object is in, or the value set by a base element.
+     */
+    readonly BaseHref: string;
+    border: string;
+    code: string;
+    /**
+     * Sets or retrieves the URL of the component.
+     */
+    codeBase: string;
+    /**
+     * Sets or retrieves the Internet media type for the code associated with the object.
+     */
+    codeType: string;
+    /**
+     * Address of a pointer to the document this page or frame contains. If there is no document, then null will be returned.
+     */
+    readonly contentDocument: Document;
+    /**
+     * Sets or retrieves the URL that references the data of the object.
+     */
+    data: string;
+    /**
+     * Sets or retrieves a character string that can be used to implement your own declare functionality for the object.
+     */
+    declare: boolean;
+    readonly form: HTMLFormElement;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: string;
+    hspace: number;
+    /**
+     * Sets or retrieves the shape of the object.
+     */
+    name: string;
+    object: string | null;
+    /**
+     * Sets or retrieves a message to be displayed while an object is loading.
+     */
+    standby: string;
+    /**
+     * Returns the content type of the object.
+     */
+    type: string;
+    /**
+     * Sets or retrieves the URL, often with a bookmark extension (#name), to use as a client-side image map.
+     */
+    useMap: string;
+    vspace: number;
+    width: number;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLAppletElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLAppletElement: {
+    prototype: HTMLAppletElement;
+    new(): HTMLAppletElement;
+};
+
+interface HTMLAreaElement extends HTMLElement {
+    /**
+     * Sets or retrieves a text alternative to the graphic.
+     */
+    alt: string;
+    /**
+     * Sets or retrieves the coordinates of the object.
+     */
+    coords: string;
+    download: string;
+    /**
+     * Sets or retrieves the subsection of the href property that follows the number sign (#).
+     */
+    hash: string;
+    /**
+     * Sets or retrieves the hostname and port number of the location or URL.
+     */
+    host: string;
+    /**
+     * Sets or retrieves the host name part of the location or URL.
+     */
+    hostname: string;
+    /**
+     * Sets or retrieves a destination URL or an anchor point.
+     */
+    href: string;
+    /**
+     * Sets or gets whether clicks in this region cause action.
+     */
+    noHref: boolean;
+    /**
+     * Sets or retrieves the file name or path specified by the object.
+     */
+    pathname: string;
+    /**
+     * Sets or retrieves the port number associated with a URL.
+     */
+    port: string;
+    /**
+     * Sets or retrieves the protocol portion of a URL.
+     */
+    protocol: string;
+    rel: string;
+    /**
+     * Sets or retrieves the substring of the href property that follows the question mark.
+     */
+    search: string;
+    /**
+     * Sets or retrieves the shape of the object.
+     */
+    shape: string;
+    /**
+     * Sets or retrieves the window or frame at which to target content.
+     */
+    target: string;
+    /**
+     * Returns a string representation of an object.
+     */
+    toString(): string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLAreaElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLAreaElement: {
+    prototype: HTMLAreaElement;
+    new(): HTMLAreaElement;
+};
+
+interface HTMLAreasCollection extends HTMLCollectionBase {
+}
+
+declare var HTMLAreasCollection: {
+    prototype: HTMLAreasCollection;
+    new(): HTMLAreasCollection;
+};
+
+interface HTMLAudioElement extends HTMLMediaElement {
+    addEventListener<K extends keyof HTMLMediaElementEventMap>(type: K, listener: (this: HTMLAudioElement, ev: HTMLMediaElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLAudioElement: {
+    prototype: HTMLAudioElement;
+    new(): HTMLAudioElement;
+};
+
+interface HTMLBaseElement extends HTMLElement {
+    /**
+     * Gets or sets the baseline URL on which relative links are based.
+     */
+    href: string;
+    /**
+     * Sets or retrieves the window or frame at which to target content.
+     */
+    target: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLBaseElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLBaseElement: {
+    prototype: HTMLBaseElement;
+    new(): HTMLBaseElement;
+};
+
+interface HTMLBaseFontElement extends HTMLElement, DOML2DeprecatedColorProperty {
+    /**
+     * Sets or retrieves the current typeface family.
+     */
+    face: string;
+    /**
+     * Sets or retrieves the font size of the object.
+     */
+    size: number;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLBaseFontElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLBaseFontElement: {
+    prototype: HTMLBaseFontElement;
+    new(): HTMLBaseFontElement;
+};
+
+interface HTMLBodyElementEventMap extends HTMLElementEventMap {
+    "afterprint": Event;
+    "beforeprint": Event;
+    "beforeunload": BeforeUnloadEvent;
+    "blur": FocusEvent;
+    "error": ErrorEvent;
+    "focus": FocusEvent;
+    "hashchange": HashChangeEvent;
+    "load": Event;
+    "message": MessageEvent;
+    "offline": Event;
+    "online": Event;
+    "orientationchange": Event;
+    "pagehide": PageTransitionEvent;
+    "pageshow": PageTransitionEvent;
+    "popstate": PopStateEvent;
+    "resize": UIEvent;
+    "scroll": UIEvent;
+    "storage": StorageEvent;
+    "unload": Event;
+}
+
+interface HTMLBodyElement extends HTMLElement {
+    aLink: any;
+    background: string;
+    bgColor: any;
+    bgProperties: string;
+    link: any;
+    noWrap: boolean;
+    onafterprint: (this: HTMLBodyElement, ev: Event) => any;
+    onbeforeprint: (this: HTMLBodyElement, ev: Event) => any;
+    onbeforeunload: (this: HTMLBodyElement, ev: BeforeUnloadEvent) => any;
+    onblur: (this: HTMLBodyElement, ev: FocusEvent) => any;
+    onerror: (this: HTMLBodyElement, ev: ErrorEvent) => any;
+    onfocus: (this: HTMLBodyElement, ev: FocusEvent) => any;
+    onhashchange: (this: HTMLBodyElement, ev: HashChangeEvent) => any;
+    onload: (this: HTMLBodyElement, ev: Event) => any;
+    onmessage: (this: HTMLBodyElement, ev: MessageEvent) => any;
+    onoffline: (this: HTMLBodyElement, ev: Event) => any;
+    ononline: (this: HTMLBodyElement, ev: Event) => any;
+    onorientationchange: (this: HTMLBodyElement, ev: Event) => any;
+    onpagehide: (this: HTMLBodyElement, ev: PageTransitionEvent) => any;
+    onpageshow: (this: HTMLBodyElement, ev: PageTransitionEvent) => any;
+    onpopstate: (this: HTMLBodyElement, ev: PopStateEvent) => any;
+    onresize: (this: HTMLBodyElement, ev: UIEvent) => any;
+    onscroll: (this: HTMLBodyElement, ev: UIEvent) => any;
+    onstorage: (this: HTMLBodyElement, ev: StorageEvent) => any;
+    onunload: (this: HTMLBodyElement, ev: Event) => any;
+    text: any;
+    vLink: any;
+    addEventListener<K extends keyof HTMLBodyElementEventMap>(type: K, listener: (this: HTMLBodyElement, ev: HTMLBodyElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLBodyElement: {
+    prototype: HTMLBodyElement;
+    new(): HTMLBodyElement;
+};
+
+interface HTMLBRElement extends HTMLElement {
+    /**
+     * Sets or retrieves the side on which floating objects are not to be positioned when any IHTMLBlockElement is inserted into the document.
+     */
+    clear: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLBRElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLBRElement: {
+    prototype: HTMLBRElement;
+    new(): HTMLBRElement;
+};
+
+interface HTMLButtonElement extends HTMLElement {
+    /**
+     * Provides a way to direct a user to a specific field when a document loads. This can provide both direction and convenience for a user, reducing the need to click or tab to a field when a page opens. This attribute is true when present on an element, and false when missing.
+     */
+    autofocus: boolean;
+    disabled: boolean;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Overrides the action attribute (where the data on a form is sent) on the parent form element.
+     */
+    formAction: string;
+    /**
+     * Used to override the encoding (formEnctype attribute) specified on the form element.
+     */
+    formEnctype: string;
+    /**
+     * Overrides the submit method attribute previously specified on a form element.
+     */
+    formMethod: string;
+    /**
+     * Overrides any validation or required attributes on a form or form elements to allow it to be submitted without validation. This can be used to create a "save draft"-type submit option.
+     */
+    formNoValidate: string;
+    /**
+     * Overrides the target attribute on a form element.
+     */
+    formTarget: string;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    status: any;
+    /**
+     * Gets the classification and default behavior of the button.
+     */
+    type: string;
+    /**
+     * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
+     */
+    readonly validationMessage: string;
+    /**
+     * Returns a  ValidityState object that represents the validity states of an element.
+     */
+    readonly validity: ValidityState;
+    /**
+     * Sets or retrieves the default or selected value of the control.
+     */
+    value: string;
+    /**
+     * Returns whether an element will successfully validate based on forms validation rules and constraints.
+     */
+    readonly willValidate: boolean;
+    /**
+     * Returns whether a form will validate when it is submitted, without having to submit it.
+     */
+    checkValidity(): boolean;
+    /**
+     * Sets a custom error message that is displayed when a form is submitted.
+     * @param error Sets a custom error message that is displayed when a form is submitted.
+     */
+    setCustomValidity(error: string): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLButtonElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLButtonElement: {
+    prototype: HTMLButtonElement;
+    new(): HTMLButtonElement;
+};
+
+interface HTMLCanvasElement extends HTMLElement {
+    /**
+     * Gets or sets the height of a canvas element on a document.
+     */
+    height: number;
+    /**
+     * Gets or sets the width of a canvas element on a document.
+     */
+    width: number;
+    /**
+     * Returns an object that provides methods and properties for drawing and manipulating images and graphics on a canvas element in a document. A context object includes information about colors, line widths, fonts, and other graphic parameters that can be drawn on a canvas.
+     * @param contextId The identifier (ID) of the type of canvas to create. Internet Explorer 9 and Internet Explorer 10 support only a 2-D context using canvas.getContext("2d"); IE11 Preview also supports 3-D or WebGL context using canvas.getContext("experimental-webgl");
+     */
+    getContext(contextId: "2d", contextAttributes?: Canvas2DContextAttributes): CanvasRenderingContext2D | null;
+    getContext(contextId: "webgl" | "experimental-webgl", contextAttributes?: WebGLContextAttributes): WebGLRenderingContext | null;
+    getContext(contextId: string, contextAttributes?: {}): CanvasRenderingContext2D | WebGLRenderingContext | null;
+    /**
+     * Returns a blob object encoded as a Portable Network Graphics (PNG) format from a canvas image or drawing.
+     */
+    msToBlob(): Blob;
+    /**
+     * Returns the content of the current canvas as an image that you can use as a source for another canvas or an HTML element.
+     * @param type The standard MIME type for the image format to return. If you do not specify this parameter, the default value is a PNG format image.
+     */
+    toDataURL(type?: string, ...args: any[]): string;
+    toBlob(callback: (result: Blob | null) => void, type?: string, ...arguments: any[]): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLCanvasElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLCanvasElement: {
+    prototype: HTMLCanvasElement;
+    new(): HTMLCanvasElement;
+};
+
+interface HTMLCollectionBase {
+    /**
+     * Sets or retrieves the number of objects in a collection.
+     */
+    readonly length: number;
+    /**
+     * Retrieves an object from various collections.
+     */
+    item(index: number): Element;
+    [index: number]: Element;
+}
+
+interface HTMLCollection extends HTMLCollectionBase {
+    /**
+     * Retrieves a select object or an object from an options collection.
+     */
+    namedItem(name: string): Element | null;
+}
+
+declare var HTMLCollection: {
+    prototype: HTMLCollection;
+    new(): HTMLCollection;
+};
+
+interface HTMLDataElement extends HTMLElement {
+    value: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLDataElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLDataElement: {
+    prototype: HTMLDataElement;
+    new(): HTMLDataElement;
+};
+
+interface HTMLDataListElement extends HTMLElement {
+    options: HTMLCollectionOf<HTMLOptionElement>;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLDataListElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLDataListElement: {
+    prototype: HTMLDataListElement;
+    new(): HTMLDataListElement;
+};
+
+interface HTMLDirectoryElement extends HTMLElement {
+    compact: boolean;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLDirectoryElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLDirectoryElement: {
+    prototype: HTMLDirectoryElement;
+    new(): HTMLDirectoryElement;
+};
+
+interface HTMLDivElement extends HTMLElement {
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    /**
+     * Sets or retrieves whether the browser automatically performs wordwrap.
+     */
+    noWrap: boolean;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLDivElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLDivElement: {
+    prototype: HTMLDivElement;
+    new(): HTMLDivElement;
+};
+
+interface HTMLDListElement extends HTMLElement {
+    compact: boolean;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLDListElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLDListElement: {
+    prototype: HTMLDListElement;
+    new(): HTMLDListElement;
+};
+
+interface HTMLDocument extends Document {
+    addEventListener<K extends keyof DocumentEventMap>(type: K, listener: (this: HTMLDocument, ev: DocumentEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLDocument: {
+    prototype: HTMLDocument;
+    new(): HTMLDocument;
+};
+
+interface HTMLElementEventMap extends ElementEventMap {
+    "abort": UIEvent;
+    "activate": UIEvent;
+    "beforeactivate": UIEvent;
+    "beforecopy": ClipboardEvent;
+    "beforecut": ClipboardEvent;
+    "beforedeactivate": UIEvent;
+    "beforepaste": ClipboardEvent;
+    "blur": FocusEvent;
+    "canplay": Event;
+    "canplaythrough": Event;
+    "change": Event;
+    "click": MouseEvent;
+    "contextmenu": PointerEvent;
+    "copy": ClipboardEvent;
+    "cuechange": Event;
+    "cut": ClipboardEvent;
+    "dblclick": MouseEvent;
+    "deactivate": UIEvent;
+    "drag": DragEvent;
+    "dragend": DragEvent;
+    "dragenter": DragEvent;
+    "dragleave": DragEvent;
+    "dragover": DragEvent;
+    "dragstart": DragEvent;
+    "drop": DragEvent;
+    "durationchange": Event;
+    "emptied": Event;
+    "ended": MediaStreamErrorEvent;
+    "error": ErrorEvent;
+    "focus": FocusEvent;
+    "input": Event;
+    "invalid": Event;
+    "keydown": KeyboardEvent;
+    "keypress": KeyboardEvent;
+    "keyup": KeyboardEvent;
+    "load": Event;
+    "loadeddata": Event;
+    "loadedmetadata": Event;
+    "loadstart": Event;
+    "mousedown": MouseEvent;
+    "mouseenter": MouseEvent;
+    "mouseleave": MouseEvent;
+    "mousemove": MouseEvent;
+    "mouseout": MouseEvent;
+    "mouseover": MouseEvent;
+    "mouseup": MouseEvent;
+    "mousewheel": WheelEvent;
+    "MSContentZoom": UIEvent;
+    "MSManipulationStateChanged": MSManipulationEvent;
+    "paste": ClipboardEvent;
+    "pause": Event;
+    "play": Event;
+    "playing": Event;
+    "progress": ProgressEvent;
+    "ratechange": Event;
+    "reset": Event;
+    "scroll": UIEvent;
+    "seeked": Event;
+    "seeking": Event;
+    "select": UIEvent;
+    "selectstart": Event;
+    "stalled": Event;
+    "submit": Event;
+    "suspend": Event;
+    "timeupdate": Event;
+    "volumechange": Event;
+    "waiting": Event;
+}
+
+interface HTMLElement extends Element {
+    accessKey: string;
+    readonly children: HTMLCollection;
+    contentEditable: string;
+    readonly dataset: DOMStringMap;
+    dir: string;
+    draggable: boolean;
+    hidden: boolean;
+    hideFocus: boolean;
+    innerText: string;
+    readonly isContentEditable: boolean;
+    lang: string;
+    readonly offsetHeight: number;
+    readonly offsetLeft: number;
+    readonly offsetParent: Element;
+    readonly offsetTop: number;
+    readonly offsetWidth: number;
+    onabort: (this: HTMLElement, ev: UIEvent) => any;
+    onactivate: (this: HTMLElement, ev: UIEvent) => any;
+    onbeforeactivate: (this: HTMLElement, ev: UIEvent) => any;
+    onbeforecopy: (this: HTMLElement, ev: ClipboardEvent) => any;
+    onbeforecut: (this: HTMLElement, ev: ClipboardEvent) => any;
+    onbeforedeactivate: (this: HTMLElement, ev: UIEvent) => any;
+    onbeforepaste: (this: HTMLElement, ev: ClipboardEvent) => any;
+    onblur: (this: HTMLElement, ev: FocusEvent) => any;
+    oncanplay: (this: HTMLElement, ev: Event) => any;
+    oncanplaythrough: (this: HTMLElement, ev: Event) => any;
+    onchange: (this: HTMLElement, ev: Event) => any;
+    onclick: (this: HTMLElement, ev: MouseEvent) => any;
+    oncontextmenu: (this: HTMLElement, ev: PointerEvent) => any;
+    oncopy: (this: HTMLElement, ev: ClipboardEvent) => any;
+    oncuechange: (this: HTMLElement, ev: Event) => any;
+    oncut: (this: HTMLElement, ev: ClipboardEvent) => any;
+    ondblclick: (this: HTMLElement, ev: MouseEvent) => any;
+    ondeactivate: (this: HTMLElement, ev: UIEvent) => any;
+    ondrag: (this: HTMLElement, ev: DragEvent) => any;
+    ondragend: (this: HTMLElement, ev: DragEvent) => any;
+    ondragenter: (this: HTMLElement, ev: DragEvent) => any;
+    ondragleave: (this: HTMLElement, ev: DragEvent) => any;
+    ondragover: (this: HTMLElement, ev: DragEvent) => any;
+    ondragstart: (this: HTMLElement, ev: DragEvent) => any;
+    ondrop: (this: HTMLElement, ev: DragEvent) => any;
+    ondurationchange: (this: HTMLElement, ev: Event) => any;
+    onemptied: (this: HTMLElement, ev: Event) => any;
+    onended: (this: HTMLElement, ev: MediaStreamErrorEvent) => any;
+    onerror: (this: HTMLElement, ev: ErrorEvent) => any;
+    onfocus: (this: HTMLElement, ev: FocusEvent) => any;
+    oninput: (this: HTMLElement, ev: Event) => any;
+    oninvalid: (this: HTMLElement, ev: Event) => any;
+    onkeydown: (this: HTMLElement, ev: KeyboardEvent) => any;
+    onkeypress: (this: HTMLElement, ev: KeyboardEvent) => any;
+    onkeyup: (this: HTMLElement, ev: KeyboardEvent) => any;
+    onload: (this: HTMLElement, ev: Event) => any;
+    onloadeddata: (this: HTMLElement, ev: Event) => any;
+    onloadedmetadata: (this: HTMLElement, ev: Event) => any;
+    onloadstart: (this: HTMLElement, ev: Event) => any;
+    onmousedown: (this: HTMLElement, ev: MouseEvent) => any;
+    onmouseenter: (this: HTMLElement, ev: MouseEvent) => any;
+    onmouseleave: (this: HTMLElement, ev: MouseEvent) => any;
+    onmousemove: (this: HTMLElement, ev: MouseEvent) => any;
+    onmouseout: (this: HTMLElement, ev: MouseEvent) => any;
+    onmouseover: (this: HTMLElement, ev: MouseEvent) => any;
+    onmouseup: (this: HTMLElement, ev: MouseEvent) => any;
+    onmousewheel: (this: HTMLElement, ev: WheelEvent) => any;
+    onmscontentzoom: (this: HTMLElement, ev: UIEvent) => any;
+    onmsmanipulationstatechanged: (this: HTMLElement, ev: MSManipulationEvent) => any;
+    onpaste: (this: HTMLElement, ev: ClipboardEvent) => any;
+    onpause: (this: HTMLElement, ev: Event) => any;
+    onplay: (this: HTMLElement, ev: Event) => any;
+    onplaying: (this: HTMLElement, ev: Event) => any;
+    onprogress: (this: HTMLElement, ev: ProgressEvent) => any;
+    onratechange: (this: HTMLElement, ev: Event) => any;
+    onreset: (this: HTMLElement, ev: Event) => any;
+    onscroll: (this: HTMLElement, ev: UIEvent) => any;
+    onseeked: (this: HTMLElement, ev: Event) => any;
+    onseeking: (this: HTMLElement, ev: Event) => any;
+    onselect: (this: HTMLElement, ev: UIEvent) => any;
+    onselectstart: (this: HTMLElement, ev: Event) => any;
+    onstalled: (this: HTMLElement, ev: Event) => any;
+    onsubmit: (this: HTMLElement, ev: Event) => any;
+    onsuspend: (this: HTMLElement, ev: Event) => any;
+    ontimeupdate: (this: HTMLElement, ev: Event) => any;
+    onvolumechange: (this: HTMLElement, ev: Event) => any;
+    onwaiting: (this: HTMLElement, ev: Event) => any;
+    outerText: string;
+    spellcheck: boolean;
+    readonly style: CSSStyleDeclaration;
+    tabIndex: number;
+    title: string;
+    blur(): void;
+    click(): void;
+    dragDrop(): boolean;
+    focus(): void;
+    msGetInputContext(): MSInputMethodContext;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLElement: {
+    prototype: HTMLElement;
+    new(): HTMLElement;
+};
+
+interface HTMLEmbedElement extends HTMLElement, GetSVGDocument {
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: string;
+    hidden: any;
+    /**
+     * Gets or sets whether the DLNA PlayTo device is available.
+     */
+    msPlayToDisabled: boolean;
+    /**
+     * Gets or sets the path to the preferred media source. This enables the Play To target device to stream the media content, which can be DRM protected, from a different location, such as a cloud media server.
+     */
+    msPlayToPreferredSourceUri: string;
+    /**
+     * Gets or sets the primary DLNA PlayTo device.
+     */
+    msPlayToPrimary: boolean;
+    /**
+     * Gets the source associated with the media element for use by the PlayToManager.
+     */
+    readonly msPlayToSource: any;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    /**
+     * Retrieves the palette used for the embedded document.
+     */
+    readonly palette: string;
+    /**
+     * Retrieves the URL of the plug-in used to view an embedded document.
+     */
+    readonly pluginspage: string;
+    readonly readyState: string;
+    /**
+     * Sets or retrieves a URL to be loaded by the object.
+     */
+    src: string;
+    /**
+     * Sets or retrieves the height and width units of the embed object.
+     */
+    units: string;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLEmbedElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLEmbedElement: {
+    prototype: HTMLEmbedElement;
+    new(): HTMLEmbedElement;
+};
+
+interface HTMLFieldSetElement extends HTMLElement {
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    disabled: boolean;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    name: string;
+    /**
+     * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
+     */
+    readonly validationMessage: string;
+    /**
+     * Returns a  ValidityState object that represents the validity states of an element.
+     */
+    readonly validity: ValidityState;
+    /**
+     * Returns whether an element will successfully validate based on forms validation rules and constraints.
+     */
+    readonly willValidate: boolean;
+    /**
+     * Returns whether a form will validate when it is submitted, without having to submit it.
+     */
+    checkValidity(): boolean;
+    /**
+     * Sets a custom error message that is displayed when a form is submitted.
+     * @param error Sets a custom error message that is displayed when a form is submitted.
+     */
+    setCustomValidity(error: string): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLFieldSetElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLFieldSetElement: {
+    prototype: HTMLFieldSetElement;
+    new(): HTMLFieldSetElement;
+};
+
+interface HTMLFontElement extends HTMLElement, DOML2DeprecatedColorProperty, DOML2DeprecatedSizeProperty {
+    /**
+     * Sets or retrieves the current typeface family.
+     */
+    face: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLFontElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLFontElement: {
+    prototype: HTMLFontElement;
+    new(): HTMLFontElement;
+};
+
+interface HTMLFormControlsCollection extends HTMLCollectionBase {
+    namedItem(name: string): HTMLCollection | Element | null;
+}
+
+declare var HTMLFormControlsCollection: {
+    prototype: HTMLFormControlsCollection;
+    new(): HTMLFormControlsCollection;
+};
+
+interface HTMLFormElement extends HTMLElement {
+    /**
+     * Sets or retrieves a list of character encodings for input data that must be accepted by the server processing the form.
+     */
+    acceptCharset: string;
+    /**
+     * Sets or retrieves the URL to which the form content is sent for processing.
+     */
+    action: string;
+    /**
+     * Specifies whether autocomplete is applied to an editable text field.
+     */
+    autocomplete: string;
+    /**
+     * Retrieves a collection, in source order, of all controls in a given form.
+     */
+    readonly elements: HTMLFormControlsCollection;
+    /**
+     * Sets or retrieves the MIME encoding for the form.
+     */
+    encoding: string;
+    /**
+     * Sets or retrieves the encoding type for the form.
+     */
+    enctype: string;
+    /**
+     * Sets or retrieves the number of objects in a collection.
+     */
+    readonly length: number;
+    /**
+     * Sets or retrieves how to send the form data to the server.
+     */
+    method: string;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    /**
+     * Designates a form that is not validated when submitted.
+     */
+    noValidate: boolean;
+    /**
+     * Sets or retrieves the window or frame at which to target content.
+     */
+    target: string;
+    /**
+     * Returns whether a form will validate when it is submitted, without having to submit it.
+     */
+    checkValidity(): boolean;
+    /**
+     * Retrieves a form object or an object from an elements collection.
+     * @param name Variant of type Number or String that specifies the object or collection to retrieve. If this parameter is a Number, it is the zero-based index of the object. If this parameter is a string, all objects with matching name or id properties are retrieved, and a collection is returned if more than one match is made.
+     * @param index Variant of type Number that specifies the zero-based index of the object to retrieve when a collection is returned.
+     */
+    item(name?: any, index?: any): any;
+    /**
+     * Retrieves a form object or an object from an elements collection.
+     */
+    namedItem(name: string): any;
+    /**
+     * Fires when the user resets a form.
+     */
+    reset(): void;
+    /**
+     * Fires when a FORM is about to be submitted.
+     */
+    submit(): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLFormElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+    [name: string]: any;
+}
+
+declare var HTMLFormElement: {
+    prototype: HTMLFormElement;
+    new(): HTMLFormElement;
+};
+
+interface HTMLFrameElementEventMap extends HTMLElementEventMap {
+    "load": Event;
+}
+
+interface HTMLFrameElement extends HTMLElement, GetSVGDocument {
+    /**
+     * Specifies the properties of a border drawn around an object.
+     */
+    border: string;
+    /**
+     * Sets or retrieves the border color of the object.
+     */
+    borderColor: any;
+    /**
+     * Retrieves the document object of the page or frame.
+     */
+    readonly contentDocument: Document;
+    /**
+     * Retrieves the object of the specified.
+     */
+    readonly contentWindow: Window;
+    /**
+     * Sets or retrieves whether to display a border for the frame.
+     */
+    frameBorder: string;
+    /**
+     * Sets or retrieves the amount of additional space between the frames.
+     */
+    frameSpacing: any;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: string | number;
+    /**
+     * Sets or retrieves a URI to a long description of the object.
+     */
+    longDesc: string;
+    /**
+     * Sets or retrieves the top and bottom margin heights before displaying the text in a frame.
+     */
+    marginHeight: string;
+    /**
+     * Sets or retrieves the left and right margin widths before displaying the text in a frame.
+     */
+    marginWidth: string;
+    /**
+     * Sets or retrieves the frame name.
+     */
+    name: string;
+    /**
+     * Sets or retrieves whether the user can resize the frame.
+     */
+    noResize: boolean;
+    /**
+     * Raised when the object has been completely received from the server.
+     */
+    onload: (this: HTMLFrameElement, ev: Event) => any;
+    /**
+     * Sets or retrieves whether the frame can be scrolled.
+     */
+    scrolling: string;
+    /**
+     * Sets or retrieves a URL to be loaded by the object.
+     */
+    src: string;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: string | number;
+    addEventListener<K extends keyof HTMLFrameElementEventMap>(type: K, listener: (this: HTMLFrameElement, ev: HTMLFrameElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLFrameElement: {
+    prototype: HTMLFrameElement;
+    new(): HTMLFrameElement;
+};
+
+interface HTMLFrameSetElementEventMap extends HTMLElementEventMap {
+    "afterprint": Event;
+    "beforeprint": Event;
+    "beforeunload": BeforeUnloadEvent;
+    "blur": FocusEvent;
+    "error": ErrorEvent;
+    "focus": FocusEvent;
+    "hashchange": HashChangeEvent;
+    "load": Event;
+    "message": MessageEvent;
+    "offline": Event;
+    "online": Event;
+    "orientationchange": Event;
+    "pagehide": PageTransitionEvent;
+    "pageshow": PageTransitionEvent;
+    "popstate": PopStateEvent;
+    "resize": UIEvent;
+    "scroll": UIEvent;
+    "storage": StorageEvent;
+    "unload": Event;
+}
+
+interface HTMLFrameSetElement extends HTMLElement {
+    border: string;
+    /**
+     * Sets or retrieves the border color of the object.
+     */
+    borderColor: any;
+    /**
+     * Sets or retrieves the frame widths of the object.
+     */
+    cols: string;
+    /**
+     * Sets or retrieves whether to display a border for the frame.
+     */
+    frameBorder: string;
+    /**
+     * Sets or retrieves the amount of additional space between the frames.
+     */
+    frameSpacing: any;
+    name: string;
+    onafterprint: (this: HTMLFrameSetElement, ev: Event) => any;
+    onbeforeprint: (this: HTMLFrameSetElement, ev: Event) => any;
+    onbeforeunload: (this: HTMLFrameSetElement, ev: BeforeUnloadEvent) => any;
+    /**
+     * Fires when the object loses the input focus.
+     */
+    onblur: (this: HTMLFrameSetElement, ev: FocusEvent) => any;
+    onerror: (this: HTMLFrameSetElement, ev: ErrorEvent) => any;
+    /**
+     * Fires when the object receives focus.
+     */
+    onfocus: (this: HTMLFrameSetElement, ev: FocusEvent) => any;
+    onhashchange: (this: HTMLFrameSetElement, ev: HashChangeEvent) => any;
+    onload: (this: HTMLFrameSetElement, ev: Event) => any;
+    onmessage: (this: HTMLFrameSetElement, ev: MessageEvent) => any;
+    onoffline: (this: HTMLFrameSetElement, ev: Event) => any;
+    ononline: (this: HTMLFrameSetElement, ev: Event) => any;
+    onorientationchange: (this: HTMLFrameSetElement, ev: Event) => any;
+    onpagehide: (this: HTMLFrameSetElement, ev: PageTransitionEvent) => any;
+    onpageshow: (this: HTMLFrameSetElement, ev: PageTransitionEvent) => any;
+    onpopstate: (this: HTMLFrameSetElement, ev: PopStateEvent) => any;
+    onresize: (this: HTMLFrameSetElement, ev: UIEvent) => any;
+    onscroll: (this: HTMLFrameSetElement, ev: UIEvent) => any;
+    onstorage: (this: HTMLFrameSetElement, ev: StorageEvent) => any;
+    onunload: (this: HTMLFrameSetElement, ev: Event) => any;
+    /**
+     * Sets or retrieves the frame heights of the object.
+     */
+    rows: string;
+    addEventListener<K extends keyof HTMLFrameSetElementEventMap>(type: K, listener: (this: HTMLFrameSetElement, ev: HTMLFrameSetElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLFrameSetElement: {
+    prototype: HTMLFrameSetElement;
+    new(): HTMLFrameSetElement;
+};
+
+interface HTMLHeadElement extends HTMLElement {
+    profile: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLHeadElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLHeadElement: {
+    prototype: HTMLHeadElement;
+    new(): HTMLHeadElement;
+};
+
+interface HTMLHeadingElement extends HTMLElement {
+    /**
+     * Sets or retrieves a value that indicates the table alignment.
+     */
+    align: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLHeadingElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLHeadingElement: {
+    prototype: HTMLHeadingElement;
+    new(): HTMLHeadingElement;
+};
+
+interface HTMLHRElement extends HTMLElement, DOML2DeprecatedColorProperty, DOML2DeprecatedSizeProperty {
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    /**
+     * Sets or retrieves whether the horizontal rule is drawn with 3-D shading.
+     */
+    noShade: boolean;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: number;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLHRElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLHRElement: {
+    prototype: HTMLHRElement;
+    new(): HTMLHRElement;
+};
+
+interface HTMLHtmlElement extends HTMLElement {
+    /**
+     * Sets or retrieves the DTD version that governs the current document.
+     */
+    version: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLHtmlElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLHtmlElement: {
+    prototype: HTMLHtmlElement;
+    new(): HTMLHtmlElement;
+};
+
+interface HTMLIFrameElementEventMap extends HTMLElementEventMap {
+    "load": Event;
+}
+
+interface HTMLIFrameElement extends HTMLElement, GetSVGDocument {
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    allowFullscreen: boolean;
+    allowPaymentRequest: boolean;
+    /**
+     * Specifies the properties of a border drawn around an object.
+     */
+    border: string;
+    /**
+     * Retrieves the document object of the page or frame.
+     */
+    readonly contentDocument: Document;
+    /**
+     * Retrieves the object of the specified.
+     */
+    readonly contentWindow: Window;
+    /**
+     * Sets or retrieves whether to display a border for the frame.
+     */
+    frameBorder: string;
+    /**
+     * Sets or retrieves the amount of additional space between the frames.
+     */
+    frameSpacing: any;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: string;
+    /**
+     * Sets or retrieves the horizontal margin for the object.
+     */
+    hspace: number;
+    /**
+     * Sets or retrieves a URI to a long description of the object.
+     */
+    longDesc: string;
+    /**
+     * Sets or retrieves the top and bottom margin heights before displaying the text in a frame.
+     */
+    marginHeight: string;
+    /**
+     * Sets or retrieves the left and right margin widths before displaying the text in a frame.
+     */
+    marginWidth: string;
+    /**
+     * Sets or retrieves the frame name.
+     */
+    name: string;
+    /**
+     * Sets or retrieves whether the user can resize the frame.
+     */
+    noResize: boolean;
+    /**
+     * Raised when the object has been completely received from the server.
+     */
+    onload: (this: HTMLIFrameElement, ev: Event) => any;
+    readonly sandbox: DOMSettableTokenList;
+    /**
+     * Sets or retrieves whether the frame can be scrolled.
+     */
+    scrolling: string;
+    /**
+     * Sets or retrieves a URL to be loaded by the object.
+     */
+    src: string;
+    /**
+     * Sets or retrieves the vertical margin for the object.
+     */
+    vspace: number;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: string;
+    addEventListener<K extends keyof HTMLIFrameElementEventMap>(type: K, listener: (this: HTMLIFrameElement, ev: HTMLIFrameElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLIFrameElement: {
+    prototype: HTMLIFrameElement;
+    new(): HTMLIFrameElement;
+};
+
+interface HTMLImageElement extends HTMLElement {
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    /**
+     * Sets or retrieves a text alternative to the graphic.
+     */
+    alt: string;
+    /**
+     * Specifies the properties of a border drawn around an object.
+     */
+    border: string;
+    /**
+     * Retrieves whether the object is fully loaded.
+     */
+    readonly complete: boolean;
+    crossOrigin: string | null;
+    readonly currentSrc: string;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: number;
+    /**
+     * Sets or retrieves the width of the border to draw around the object.
+     */
+    hspace: number;
+    /**
+     * Sets or retrieves whether the image is a server-side image map.
+     */
+    isMap: boolean;
+    /**
+     * Sets or retrieves a Uniform Resource Identifier (URI) to a long description of the object.
+     */
+    longDesc: string;
+    lowsrc: string;
+    /**
+     * Gets or sets whether the DLNA PlayTo device is available.
+     */
+    msPlayToDisabled: boolean;
+    msPlayToPreferredSourceUri: string;
+    /**
+     * Gets or sets the primary DLNA PlayTo device.
+     */
+    msPlayToPrimary: boolean;
+    /**
+     * Gets the source associated with the media element for use by the PlayToManager.
+     */
+    readonly msPlayToSource: any;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    /**
+     * The original height of the image resource before sizing.
+     */
+    readonly naturalHeight: number;
+    /**
+     * The original width of the image resource before sizing.
+     */
+    readonly naturalWidth: number;
+    sizes: string;
+    /**
+     * The address or URL of the a media resource that is to be considered.
+     */
+    src: string;
+    srcset: string;
+    /**
+     * Sets or retrieves the URL, often with a bookmark extension (#name), to use as a client-side image map.
+     */
+    useMap: string;
+    /**
+     * Sets or retrieves the vertical margin for the object.
+     */
+    vspace: number;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: number;
+    readonly x: number;
+    readonly y: number;
+    msGetAsCastingSource(): any;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLImageElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLImageElement: {
+    prototype: HTMLImageElement;
+    new(): HTMLImageElement;
+};
+
+interface HTMLInputElement extends HTMLElement {
+    /**
+     * Sets or retrieves a comma-separated list of content types.
+     */
+    accept: string;
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    /**
+     * Sets or retrieves a text alternative to the graphic.
+     */
+    alt: string;
+    /**
+     * Specifies whether autocomplete is applied to an editable text field.
+     */
+    autocomplete: string;
+    /**
+     * Provides a way to direct a user to a specific field when a document loads. This can provide both direction and convenience for a user, reducing the need to click or tab to a field when a page opens. This attribute is true when present on an element, and false when missing.
+     */
+    autofocus: boolean;
+    /**
+     * Sets or retrieves the width of the border to draw around the object.
+     */
+    border: string;
+    /**
+     * Sets or retrieves the state of the check box or radio button.
+     */
+    checked: boolean;
+    /**
+     * Retrieves whether the object is fully loaded.
+     */
+    readonly complete: boolean;
+    /**
+     * Sets or retrieves the state of the check box or radio button.
+     */
+    defaultChecked: boolean;
+    /**
+     * Sets or retrieves the initial contents of the object.
+     */
+    defaultValue: string;
+    disabled: boolean;
+    /**
+     * Returns a FileList object on a file type input object.
+     */
+    readonly files: FileList | null;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Overrides the action attribute (where the data on a form is sent) on the parent form element.
+     */
+    formAction: string;
+    /**
+     * Used to override the encoding (formEnctype attribute) specified on the form element.
+     */
+    formEnctype: string;
+    /**
+     * Overrides the submit method attribute previously specified on a form element.
+     */
+    formMethod: string;
+    /**
+     * Overrides any validation or required attributes on a form or form elements to allow it to be submitted without validation. This can be used to create a "save draft"-type submit option.
+     */
+    formNoValidate: string;
+    /**
+     * Overrides the target attribute on a form element.
+     */
+    formTarget: string;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: string;
+    /**
+     * Sets or retrieves the width of the border to draw around the object.
+     */
+    hspace: number;
+    indeterminate: boolean;
+    /**
+     * Specifies the ID of a pre-defined datalist of options for an input element.
+     */
+    readonly list: HTMLElement;
+    /**
+     * Defines the maximum acceptable value for an input element with type="number".When used with the min and step attributes, lets you control the range and increment (such as only even numbers) that the user can enter into an input field.
+     */
+    max: string;
+    /**
+     * Sets or retrieves the maximum number of characters that the user can enter in a text control.
+     */
+    maxLength: number;
+    /**
+     * Defines the minimum acceptable value for an input element with type="number". When used with the max and step attributes, lets you control the range and increment (such as even numbers only) that the user can enter into an input field.
+     */
+    min: string;
+    /**
+     * Sets or retrieves the Boolean value indicating whether multiple items can be selected from a list.
+     */
+    multiple: boolean;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    /**
+     * Gets or sets a string containing a regular expression that the user's input must match.
+     */
+    pattern: string;
+    /**
+     * Gets or sets a text string that is displayed in an input field as a hint or prompt to users as the format or type of information they need to enter.The text appears in an input field until the user puts focus on the field.
+     */
+    placeholder: string;
+    readOnly: boolean;
+    /**
+     * When present, marks an element that can't be submitted without a value.
+     */
+    required: boolean;
+    selectionDirection: string;
+    /**
+     * Gets or sets the end position or offset of a text selection.
+     */
+    selectionEnd: number;
+    /**
+     * Gets or sets the starting position or offset of a text selection.
+     */
+    selectionStart: number;
+    size: number;
+    /**
+     * The address or URL of the a media resource that is to be considered.
+     */
+    src: string;
+    status: boolean;
+    /**
+     * Defines an increment or jump between values that you want to allow the user to enter. When used with the max and min attributes, lets you control the range and increment (for example, allow only even numbers) that the user can enter into an input field.
+     */
+    step: string;
+    /**
+     * Returns the content type of the object.
+     */
+    type: string;
+    /**
+     * Sets or retrieves the URL, often with a bookmark extension (#name), to use as a client-side image map.
+     */
+    useMap: string;
+    /**
+     * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
+     */
+    readonly validationMessage: string;
+    /**
+     * Returns a  ValidityState object that represents the validity states of an element.
+     */
+    readonly validity: ValidityState;
+    /**
+     * Returns the value of the data at the cursor's current position.
+     */
+    value: string;
+    valueAsDate: Date;
+    /**
+     * Returns the input field value as a number.
+     */
+    valueAsNumber: number;
+    /**
+     * Sets or retrieves the vertical margin for the object.
+     */
+    vspace: number;
+    webkitdirectory: boolean;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: string;
+    /**
+     * Returns whether an element will successfully validate based on forms validation rules and constraints.
+     */
+    readonly willValidate: boolean;
+    minLength: number;
+    /**
+     * Returns whether a form will validate when it is submitted, without having to submit it.
+     */
+    checkValidity(): boolean;
+    /**
+     * Makes the selection equal to the current object.
+     */
+    select(): void;
+    /**
+     * Sets a custom error message that is displayed when a form is submitted.
+     * @param error Sets a custom error message that is displayed when a form is submitted.
+     */
+    setCustomValidity(error: string): void;
+    /**
+     * Sets the start and end positions of a selection in a text field.
+     * @param start The offset into the text field for the start of the selection.
+     * @param end The offset into the text field for the end of the selection.
+     */
+    setSelectionRange(start?: number, end?: number, direction?: string): void;
+    /**
+     * Decrements a range input control's value by the value given by the Step attribute. If the optional parameter is used, it will decrement the input control's step value multiplied by the parameter's value.
+     * @param n Value to decrement the value by.
+     */
+    stepDown(n?: number): void;
+    /**
+     * Increments a range input control's value by the value given by the Step attribute. If the optional parameter is used, will increment the input control's value by that value.
+     * @param n Value to increment the value by.
+     */
+    stepUp(n?: number): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLInputElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLInputElement: {
+    prototype: HTMLInputElement;
+    new(): HTMLInputElement;
+};
+
+interface HTMLLabelElement extends HTMLElement {
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Sets or retrieves the object to which the given label object is assigned.
+     */
+    htmlFor: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLLabelElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLLabelElement: {
+    prototype: HTMLLabelElement;
+    new(): HTMLLabelElement;
+};
+
+interface HTMLLegendElement extends HTMLElement {
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    align: string;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLLegendElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLLegendElement: {
+    prototype: HTMLLegendElement;
+    new(): HTMLLegendElement;
+};
+
+interface HTMLLIElement extends HTMLElement {
+    type: string;
+    /**
+     * Sets or retrieves the value of a list item.
+     */
+    value: number;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLLIElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLLIElement: {
+    prototype: HTMLLIElement;
+    new(): HTMLLIElement;
+};
+
+interface HTMLLinkElement extends HTMLElement, LinkStyle {
+    /**
+     * Sets or retrieves the character set used to encode the object.
+     */
+    charset: string;
+    disabled: boolean;
+    /**
+     * Sets or retrieves a destination URL or an anchor point.
+     */
+    href: string;
+    /**
+     * Sets or retrieves the language code of the object.
+     */
+    hreflang: string;
+    /**
+     * Sets or retrieves the media type.
+     */
+    media: string;
+    /**
+     * Sets or retrieves the relationship between the object and the destination of the link.
+     */
+    rel: string;
+    /**
+     * Sets or retrieves the relationship between the object and the destination of the link.
+     */
+    rev: string;
+    /**
+     * Sets or retrieves the window or frame at which to target content.
+     */
+    target: string;
+    /**
+     * Sets or retrieves the MIME type of the object.
+     */
+    type: string;
+    import?: Document;
+    integrity: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLLinkElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLLinkElement: {
+    prototype: HTMLLinkElement;
+    new(): HTMLLinkElement;
+};
+
+interface HTMLMapElement extends HTMLElement {
+    /**
+     * Retrieves a collection of the area objects defined for the given map object.
+     */
+    readonly areas: HTMLAreasCollection;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLMapElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLMapElement: {
+    prototype: HTMLMapElement;
+    new(): HTMLMapElement;
+};
+
+interface HTMLMarqueeElementEventMap extends HTMLElementEventMap {
+    "bounce": Event;
+    "finish": Event;
+    "start": Event;
+}
+
+interface HTMLMarqueeElement extends HTMLElement {
+    behavior: string;
+    bgColor: any;
+    direction: string;
+    height: string;
+    hspace: number;
+    loop: number;
+    onbounce: (this: HTMLMarqueeElement, ev: Event) => any;
+    onfinish: (this: HTMLMarqueeElement, ev: Event) => any;
+    onstart: (this: HTMLMarqueeElement, ev: Event) => any;
+    scrollAmount: number;
+    scrollDelay: number;
+    trueSpeed: boolean;
+    vspace: number;
+    width: string;
+    start(): void;
+    stop(): void;
+    addEventListener<K extends keyof HTMLMarqueeElementEventMap>(type: K, listener: (this: HTMLMarqueeElement, ev: HTMLMarqueeElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLMarqueeElement: {
+    prototype: HTMLMarqueeElement;
+    new(): HTMLMarqueeElement;
+};
+
+interface HTMLMediaElementEventMap extends HTMLElementEventMap {
+    "encrypted": MediaEncryptedEvent;
+    "msneedkey": MSMediaKeyNeededEvent;
+}
+
+interface HTMLMediaElement extends HTMLElement {
+    /**
+     * Returns an AudioTrackList object with the audio tracks for a given video element.
+     */
+    readonly audioTracks: AudioTrackList;
+    /**
+     * Gets or sets a value that indicates whether to start playing the media automatically.
+     */
+    autoplay: boolean;
+    /**
+     * Gets a collection of buffered time ranges.
+     */
+    readonly buffered: TimeRanges;
+    /**
+     * Gets or sets a flag that indicates whether the client provides a set of controls for the media (in case the developer does not include controls for the player).
+     */
+    controls: boolean;
+    crossOrigin: string | null;
+    /**
+     * Gets the address or URL of the current media resource that is selected by IHTMLMediaElement.
+     */
+    readonly currentSrc: string;
+    /**
+     * Gets or sets the current playback position, in seconds.
+     */
+    currentTime: number;
+    defaultMuted: boolean;
+    /**
+     * Gets or sets the default playback rate when the user is not using fast forward or reverse for a video or audio resource.
+     */
+    defaultPlaybackRate: number;
+    /**
+     * Returns the duration in seconds of the current media resource. A NaN value is returned if duration is not available, or Infinity if the media resource is streaming.
+     */
+    readonly duration: number;
+    /**
+     * Gets information about whether the playback has ended or not.
+     */
+    readonly ended: boolean;
+    /**
+     * Returns an object representing the current error state of the audio or video element.
+     */
+    readonly error: MediaError;
+    /**
+     * Gets or sets a flag to specify whether playback should restart after it completes.
+     */
+    loop: boolean;
+    readonly mediaKeys: MediaKeys | null;
+    /**
+     * Specifies the purpose of the audio or video media, such as background audio or alerts.
+     */
+    msAudioCategory: string;
+    /**
+     * Specifies the output device id that the audio will be sent to.
+     */
+    msAudioDeviceType: string;
+    readonly msGraphicsTrustStatus: MSGraphicsTrust;
+    /**
+     * Gets the MSMediaKeys object, which is used for decrypting media data, that is associated with this media element.
+     */
+    readonly msKeys: MSMediaKeys;
+    /**
+     * Gets or sets whether the DLNA PlayTo device is available.
+     */
+    msPlayToDisabled: boolean;
+    /**
+     * Gets or sets the path to the preferred media source. This enables the Play To target device to stream the media content, which can be DRM protected, from a different location, such as a cloud media server.
+     */
+    msPlayToPreferredSourceUri: string;
+    /**
+     * Gets or sets the primary DLNA PlayTo device.
+     */
+    msPlayToPrimary: boolean;
+    /**
+     * Gets the source associated with the media element for use by the PlayToManager.
+     */
+    readonly msPlayToSource: any;
+    /**
+     * Specifies whether or not to enable low-latency playback on the media element.
+     */
+    msRealTime: boolean;
+    /**
+     * Gets or sets a flag that indicates whether the audio (either audio or the audio track on video media) is muted.
+     */
+    muted: boolean;
+    /**
+     * Gets the current network activity for the element.
+     */
+    readonly networkState: number;
+    onencrypted: (this: HTMLMediaElement, ev: MediaEncryptedEvent) => any;
+    onmsneedkey: (this: HTMLMediaElement, ev: MSMediaKeyNeededEvent) => any;
+    /**
+     * Gets a flag that specifies whether playback is paused.
+     */
+    readonly paused: boolean;
+    /**
+     * Gets or sets the current rate of speed for the media resource to play. This speed is expressed as a multiple of the normal speed of the media resource.
+     */
+    playbackRate: number;
+    /**
+     * Gets TimeRanges for the current media resource that has been played.
+     */
+    readonly played: TimeRanges;
+    /**
+     * Gets or sets the current playback position, in seconds.
+     */
+    preload: string;
+    readyState: number;
+    /**
+     * Returns a TimeRanges object that represents the ranges of the current media resource that can be seeked.
+     */
+    readonly seekable: TimeRanges;
+    /**
+     * Gets a flag that indicates whether the the client is currently moving to a new playback position in the media resource.
+     */
+    readonly seeking: boolean;
+    /**
+     * The address or URL of the a media resource that is to be considered.
+     */
+    src: string;
+    srcObject: MediaStream | null;
+    readonly textTracks: TextTrackList;
+    readonly videoTracks: VideoTrackList;
+    /**
+     * Gets or sets the volume level for audio portions of the media element.
+     */
+    volume: number;
+    addTextTrack(kind: string, label?: string, language?: string): TextTrack;
+    /**
+     * Returns a string that specifies whether the client can play a given media resource type.
+     */
+    canPlayType(type: string): string;
+    /**
+     * Resets the audio or video object and loads a new media resource.
+     */
+    load(): void;
+    /**
+     * Clears all effects from the media pipeline.
+     */
+    msClearEffects(): void;
+    msGetAsCastingSource(): any;
+    /**
+     * Inserts the specified audio effect into media pipeline.
+     */
+    msInsertAudioEffect(activatableClassId: string, effectRequired: boolean, config?: any): void;
+    msSetMediaKeys(mediaKeys: MSMediaKeys): void;
+    /**
+     * Specifies the media protection manager for a given media pipeline.
+     */
+    msSetMediaProtectionManager(mediaProtectionManager?: any): void;
+    /**
+     * Pauses the current playback and sets paused to TRUE. This can be used to test whether the media is playing or paused. You can also use the pause or play events to tell whether the media is playing or not.
+     */
+    pause(): void;
+    /**
+     * Loads and starts playback of a media resource.
+     */
+    play(): Promise<void>;
+    setMediaKeys(mediaKeys: MediaKeys | null): Promise<void>;
+    readonly HAVE_CURRENT_DATA: number;
+    readonly HAVE_ENOUGH_DATA: number;
+    readonly HAVE_FUTURE_DATA: number;
+    readonly HAVE_METADATA: number;
+    readonly HAVE_NOTHING: number;
+    readonly NETWORK_EMPTY: number;
+    readonly NETWORK_IDLE: number;
+    readonly NETWORK_LOADING: number;
+    readonly NETWORK_NO_SOURCE: number;
+    addEventListener<K extends keyof HTMLMediaElementEventMap>(type: K, listener: (this: HTMLMediaElement, ev: HTMLMediaElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLMediaElement: {
+    prototype: HTMLMediaElement;
+    new(): HTMLMediaElement;
+    readonly HAVE_CURRENT_DATA: number;
+    readonly HAVE_ENOUGH_DATA: number;
+    readonly HAVE_FUTURE_DATA: number;
+    readonly HAVE_METADATA: number;
+    readonly HAVE_NOTHING: number;
+    readonly NETWORK_EMPTY: number;
+    readonly NETWORK_IDLE: number;
+    readonly NETWORK_LOADING: number;
+    readonly NETWORK_NO_SOURCE: number;
+};
+
+interface HTMLMenuElement extends HTMLElement {
+    compact: boolean;
+    type: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLMenuElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLMenuElement: {
+    prototype: HTMLMenuElement;
+    new(): HTMLMenuElement;
+};
+
+interface HTMLMetaElement extends HTMLElement {
+    /**
+     * Sets or retrieves the character set used to encode the object.
+     */
+    charset: string;
+    /**
+     * Gets or sets meta-information to associate with httpEquiv or name.
+     */
+    content: string;
+    /**
+     * Gets or sets information used to bind the value of a content attribute of a meta element to an HTTP response header.
+     */
+    httpEquiv: string;
+    /**
+     * Sets or retrieves the value specified in the content attribute of the meta object.
+     */
+    name: string;
+    /**
+     * Sets or retrieves a scheme to be used in interpreting the value of a property specified for the object.
+     */
+    scheme: string;
+    /**
+     * Sets or retrieves the URL property that will be loaded after the specified time has elapsed.
+     */
+    url: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLMetaElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLMetaElement: {
+    prototype: HTMLMetaElement;
+    new(): HTMLMetaElement;
+};
+
+interface HTMLMeterElement extends HTMLElement {
+    high: number;
+    low: number;
+    max: number;
+    min: number;
+    optimum: number;
+    value: number;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLMeterElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLMeterElement: {
+    prototype: HTMLMeterElement;
+    new(): HTMLMeterElement;
+};
+
+interface HTMLModElement extends HTMLElement {
+    /**
+     * Sets or retrieves reference information about the object.
+     */
+    cite: string;
+    /**
+     * Sets or retrieves the date and time of a modification to the object.
+     */
+    dateTime: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLModElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLModElement: {
+    prototype: HTMLModElement;
+    new(): HTMLModElement;
+};
+
+interface HTMLObjectElement extends HTMLElement, GetSVGDocument {
+    align: string;
+    /**
+     * Sets or retrieves a text alternative to the graphic.
+     */
+    alt: string;
+    /**
+     * Gets or sets the optional alternative HTML script to execute if the object fails to load.
+     */
+    altHtml: string;
+    /**
+     * Sets or retrieves a character string that can be used to implement your own archive functionality for the object.
+     */
+    archive: string;
+    /**
+     * Retrieves a string of the URL where the object tag can be found. This is often the href of the document that the object is in, or the value set by a base element.
+     */
+    readonly BaseHref: string;
+    border: string;
+    /**
+     * Sets or retrieves the URL of the file containing the compiled Java class.
+     */
+    code: string;
+    /**
+     * Sets or retrieves the URL of the component.
+     */
+    codeBase: string;
+    /**
+     * Sets or retrieves the Internet media type for the code associated with the object.
+     */
+    codeType: string;
+    /**
+     * Retrieves the document object of the page or frame.
+     */
+    readonly contentDocument: Document;
+    /**
+     * Sets or retrieves the URL that references the data of the object.
+     */
+    data: string;
+    declare: boolean;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: string;
+    hspace: number;
+    /**
+     * Gets or sets whether the DLNA PlayTo device is available.
+     */
+    msPlayToDisabled: boolean;
+    /**
+     * Gets or sets the path to the preferred media source. This enables the Play To target device to stream the media content, which can be DRM protected, from a different location, such as a cloud media server.
+     */
+    msPlayToPreferredSourceUri: string;
+    /**
+     * Gets or sets the primary DLNA PlayTo device.
+     */
+    msPlayToPrimary: boolean;
+    /**
+     * Gets the source associated with the media element for use by the PlayToManager.
+     */
+    readonly msPlayToSource: any;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    readonly readyState: number;
+    /**
+     * Sets or retrieves a message to be displayed while an object is loading.
+     */
+    standby: string;
+    /**
+     * Sets or retrieves the MIME type of the object.
+     */
+    type: string;
+    /**
+     * Sets or retrieves the URL, often with a bookmark extension (#name), to use as a client-side image map.
+     */
+    useMap: string;
+    /**
+     * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
+     */
+    readonly validationMessage: string;
+    /**
+     * Returns a  ValidityState object that represents the validity states of an element.
+     */
+    readonly validity: ValidityState;
+    vspace: number;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: string;
+    /**
+     * Returns whether an element will successfully validate based on forms validation rules and constraints.
+     */
+    readonly willValidate: boolean;
+    /**
+     * Returns whether a form will validate when it is submitted, without having to submit it.
+     */
+    checkValidity(): boolean;
+    /**
+     * Sets a custom error message that is displayed when a form is submitted.
+     * @param error Sets a custom error message that is displayed when a form is submitted.
+     */
+    setCustomValidity(error: string): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLObjectElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLObjectElement: {
+    prototype: HTMLObjectElement;
+    new(): HTMLObjectElement;
+};
+
+interface HTMLOListElement extends HTMLElement {
+    compact: boolean;
+    /**
+     * The starting number.
+     */
+    start: number;
+    type: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLOListElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLOListElement: {
+    prototype: HTMLOListElement;
+    new(): HTMLOListElement;
+};
+
+interface HTMLOptGroupElement extends HTMLElement {
+    /**
+     * Sets or retrieves the status of an option.
+     */
+    defaultSelected: boolean;
+    disabled: boolean;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Sets or retrieves the ordinal position of an option in a list box.
+     */
+    readonly index: number;
+    /**
+     * Sets or retrieves a value that you can use to implement your own label functionality for the object.
+     */
+    label: string;
+    /**
+     * Sets or retrieves whether the option in the list box is the default item.
+     */
+    selected: boolean;
+    /**
+     * Sets or retrieves the text string specified by the option tag.
+     */
+    readonly text: string;
+    /**
+     * Sets or retrieves the value which is returned to the server when the form control is submitted.
+     */
+    value: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLOptGroupElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLOptGroupElement: {
+    prototype: HTMLOptGroupElement;
+    new(): HTMLOptGroupElement;
+};
+
+interface HTMLOptionElement extends HTMLElement {
+    /**
+     * Sets or retrieves the status of an option.
+     */
+    defaultSelected: boolean;
+    disabled: boolean;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Sets or retrieves the ordinal position of an option in a list box.
+     */
+    readonly index: number;
+    /**
+     * Sets or retrieves a value that you can use to implement your own label functionality for the object.
+     */
+    label: string;
+    /**
+     * Sets or retrieves whether the option in the list box is the default item.
+     */
+    selected: boolean;
+    /**
+     * Sets or retrieves the text string specified by the option tag.
+     */
+    text: string;
+    /**
+     * Sets or retrieves the value which is returned to the server when the form control is submitted.
+     */
+    value: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLOptionElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLOptionElement: {
+    prototype: HTMLOptionElement;
+    new(): HTMLOptionElement;
+};
+
+interface HTMLOptionsCollection extends HTMLCollectionOf<HTMLOptionElement> {
+    length: number;
+    selectedIndex: number;
+    add(element: HTMLOptionElement | HTMLOptGroupElement, before?: HTMLElement | number): void;
+    remove(index: number): void;
+}
+
+declare var HTMLOptionsCollection: {
+    prototype: HTMLOptionsCollection;
+    new(): HTMLOptionsCollection;
+};
+
+interface HTMLOutputElement extends HTMLElement {
+    defaultValue: string;
+    readonly form: HTMLFormElement;
+    readonly htmlFor: DOMSettableTokenList;
+    name: string;
+    readonly type: string;
+    readonly validationMessage: string;
+    readonly validity: ValidityState;
+    value: string;
+    readonly willValidate: boolean;
+    checkValidity(): boolean;
+    reportValidity(): boolean;
+    setCustomValidity(error: string): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLOutputElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLOutputElement: {
+    prototype: HTMLOutputElement;
+    new(): HTMLOutputElement;
+};
+
+interface HTMLParagraphElement extends HTMLElement {
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    clear: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLParagraphElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLParagraphElement: {
+    prototype: HTMLParagraphElement;
+    new(): HTMLParagraphElement;
+};
+
+interface HTMLParamElement extends HTMLElement {
+    /**
+     * Sets or retrieves the name of an input parameter for an element.
+     */
+    name: string;
+    /**
+     * Sets or retrieves the content type of the resource designated by the value attribute.
+     */
+    type: string;
+    /**
+     * Sets or retrieves the value of an input parameter for an element.
+     */
+    value: string;
+    /**
+     * Sets or retrieves the data type of the value attribute.
+     */
+    valueType: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLParamElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLParamElement: {
+    prototype: HTMLParamElement;
+    new(): HTMLParamElement;
+};
+
+interface HTMLPictureElement extends HTMLElement {
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLPictureElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLPictureElement: {
+    prototype: HTMLPictureElement;
+    new(): HTMLPictureElement;
+};
+
+interface HTMLPreElement extends HTMLElement {
+    /**
+     * Sets or gets a value that you can use to implement your own width functionality for the object.
+     */
+    width: number;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLPreElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLPreElement: {
+    prototype: HTMLPreElement;
+    new(): HTMLPreElement;
+};
+
+interface HTMLProgressElement extends HTMLElement {
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Defines the maximum, or "done" value for a progress element.
+     */
+    max: number;
+    /**
+     * Returns the quotient of value/max when the value attribute is set (determinate progress bar), or -1 when the value attribute is missing (indeterminate progress bar).
+     */
+    readonly position: number;
+    /**
+     * Sets or gets the current value of a progress element. The value must be a non-negative number between 0 and the max value.
+     */
+    value: number;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLProgressElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLProgressElement: {
+    prototype: HTMLProgressElement;
+    new(): HTMLProgressElement;
+};
+
+interface HTMLQuoteElement extends HTMLElement {
+    /**
+     * Sets or retrieves reference information about the object.
+     */
+    cite: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLQuoteElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLQuoteElement: {
+    prototype: HTMLQuoteElement;
+    new(): HTMLQuoteElement;
+};
+
+interface HTMLScriptElement extends HTMLElement {
+    async: boolean;
+    /**
+     * Sets or retrieves the character set used to encode the object.
+     */
+    charset: string;
+    crossOrigin: string | null;
+    /**
+     * Sets or retrieves the status of the script.
+     */
+    defer: boolean;
+    /**
+     * Sets or retrieves the event for which the script is written.
+     */
+    event: string;
+    /**
+     * Sets or retrieves the object that is bound to the event script.
+     */
+    htmlFor: string;
+    /**
+     * Retrieves the URL to an external file that contains the source code or data.
+     */
+    src: string;
+    /**
+     * Retrieves or sets the text of the object as a string.
+     */
+    text: string;
+    /**
+     * Sets or retrieves the MIME type for the associated scripting engine.
+     */
+    type: string;
+    integrity: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLScriptElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLScriptElement: {
+    prototype: HTMLScriptElement;
+    new(): HTMLScriptElement;
+};
+
+interface HTMLSelectElement extends HTMLElement {
+    /**
+     * Provides a way to direct a user to a specific field when a document loads. This can provide both direction and convenience for a user, reducing the need to click or tab to a field when a page opens. This attribute is true when present on an element, and false when missing.
+     */
+    autofocus: boolean;
+    disabled: boolean;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Sets or retrieves the number of objects in a collection.
+     */
+    length: number;
+    /**
+     * Sets or retrieves the Boolean value indicating whether multiple items can be selected from a list.
+     */
+    multiple: boolean;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    readonly options: HTMLOptionsCollection;
+    /**
+     * When present, marks an element that can't be submitted without a value.
+     */
+    required: boolean;
+    /**
+     * Sets or retrieves the index of the selected option in a select object.
+     */
+    selectedIndex: number;
+    selectedOptions: HTMLCollectionOf<HTMLOptionElement>;
+    /**
+     * Sets or retrieves the number of rows in the list box.
+     */
+    size: number;
+    /**
+     * Retrieves the type of select control based on the value of the MULTIPLE attribute.
+     */
+    readonly type: string;
+    /**
+     * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
+     */
+    readonly validationMessage: string;
+    /**
+     * Returns a  ValidityState object that represents the validity states of an element.
+     */
+    readonly validity: ValidityState;
+    /**
+     * Sets or retrieves the value which is returned to the server when the form control is submitted.
+     */
+    value: string;
+    /**
+     * Returns whether an element will successfully validate based on forms validation rules and constraints.
+     */
+    readonly willValidate: boolean;
+    /**
+     * Adds an element to the areas, controlRange, or options collection.
+     * @param element Variant of type Number that specifies the index position in the collection where the element is placed. If no value is given, the method places the element at the end of the collection.
+     * @param before Variant of type Object that specifies an element to insert before, or null to append the object to the collection.
+     */
+    add(element: HTMLElement, before?: HTMLElement | number): void;
+    /**
+     * Returns whether a form will validate when it is submitted, without having to submit it.
+     */
+    checkValidity(): boolean;
+    /**
+     * Retrieves a select object or an object from an options collection.
+     * @param name Variant of type Number or String that specifies the object or collection to retrieve. If this parameter is an integer, it is the zero-based index of the object. If this parameter is a string, all objects with matching name or id properties are retrieved, and a collection is returned if more than one match is made.
+     * @param index Variant of type Number that specifies the zero-based index of the object to retrieve when a collection is returned.
+     */
+    item(name?: any, index?: any): any;
+    /**
+     * Retrieves a select object or an object from an options collection.
+     * @param namedItem A String that specifies the name or id property of the object to retrieve. A collection is returned if more than one match is made.
+     */
+    namedItem(name: string): any;
+    /**
+     * Removes an element from the collection.
+     * @param index Number that specifies the zero-based index of the element to remove from the collection.
+     */
+    remove(index?: number): void;
+    /**
+     * Sets a custom error message that is displayed when a form is submitted.
+     * @param error Sets a custom error message that is displayed when a form is submitted.
+     */
+    setCustomValidity(error: string): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLSelectElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+    [name: string]: any;
+}
+
+declare var HTMLSelectElement: {
+    prototype: HTMLSelectElement;
+    new(): HTMLSelectElement;
+};
+
+interface HTMLSourceElement extends HTMLElement {
+    /**
+     * Gets or sets the intended media type of the media source.
+     */
+    media: string;
+    msKeySystem: string;
+    sizes: string;
+    /**
+     * The address or URL of the a media resource that is to be considered.
+     */
+    src: string;
+    srcset: string;
+    /**
+     * Gets or sets the MIME type of a media resource.
+     */
+    type: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLSourceElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLSourceElement: {
+    prototype: HTMLSourceElement;
+    new(): HTMLSourceElement;
+};
+
+interface HTMLSpanElement extends HTMLElement {
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLSpanElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLSpanElement: {
+    prototype: HTMLSpanElement;
+    new(): HTMLSpanElement;
+};
+
+interface HTMLStyleElement extends HTMLElement, LinkStyle {
+    disabled: boolean;
+    /**
+     * Sets or retrieves the media type.
+     */
+    media: string;
+    /**
+     * Retrieves the CSS language in which the style sheet is written.
+     */
+    type: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLStyleElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLStyleElement: {
+    prototype: HTMLStyleElement;
+    new(): HTMLStyleElement;
+};
+
+interface HTMLTableCaptionElement extends HTMLElement {
+    /**
+     * Sets or retrieves the alignment of the caption or legend.
+     */
+    align: string;
+    /**
+     * Sets or retrieves whether the caption appears at the top or bottom of the table.
+     */
+    vAlign: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTableCaptionElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTableCaptionElement: {
+    prototype: HTMLTableCaptionElement;
+    new(): HTMLTableCaptionElement;
+};
+
+interface HTMLTableCellElement extends HTMLElement, HTMLTableAlignment {
+    /**
+     * Sets or retrieves abbreviated text for the object.
+     */
+    abbr: string;
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    /**
+     * Sets or retrieves a comma-delimited list of conceptual categories associated with the object.
+     */
+    axis: string;
+    bgColor: any;
+    /**
+     * Retrieves the position of the object in the cells collection of a row.
+     */
+    readonly cellIndex: number;
+    /**
+     * Sets or retrieves the number columns in the table that the object should span.
+     */
+    colSpan: number;
+    /**
+     * Sets or retrieves a list of header cells that provide information for the object.
+     */
+    headers: string;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: any;
+    /**
+     * Sets or retrieves whether the browser automatically performs wordwrap.
+     */
+    noWrap: boolean;
+    /**
+     * Sets or retrieves how many rows in a table the cell should span.
+     */
+    rowSpan: number;
+    /**
+     * Sets or retrieves the group of cells in a table to which the object's information applies.
+     */
+    scope: string;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTableCellElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTableCellElement: {
+    prototype: HTMLTableCellElement;
+    new(): HTMLTableCellElement;
+};
+
+interface HTMLTableColElement extends HTMLElement, HTMLTableAlignment {
+    /**
+     * Sets or retrieves the alignment of the object relative to the display or table.
+     */
+    align: string;
+    /**
+     * Sets or retrieves the number of columns in the group.
+     */
+    span: number;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: any;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTableColElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTableColElement: {
+    prototype: HTMLTableColElement;
+    new(): HTMLTableColElement;
+};
+
+interface HTMLTableDataCellElement extends HTMLTableCellElement {
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTableDataCellElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTableDataCellElement: {
+    prototype: HTMLTableDataCellElement;
+    new(): HTMLTableDataCellElement;
+};
+
+interface HTMLTableElement extends HTMLElement {
+    /**
+     * Sets or retrieves a value that indicates the table alignment.
+     */
+    align: string;
+    bgColor: any;
+    /**
+     * Sets or retrieves the width of the border to draw around the object.
+     */
+    border: string;
+    /**
+     * Sets or retrieves the border color of the object.
+     */
+    borderColor: any;
+    /**
+     * Retrieves the caption object of a table.
+     */
+    caption: HTMLTableCaptionElement;
+    /**
+     * Sets or retrieves the amount of space between the border of the cell and the content of the cell.
+     */
+    cellPadding: string;
+    /**
+     * Sets or retrieves the amount of space between cells in a table.
+     */
+    cellSpacing: string;
+    /**
+     * Sets or retrieves the number of columns in the table.
+     */
+    cols: number;
+    /**
+     * Sets or retrieves the way the border frame around the table is displayed.
+     */
+    frame: string;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: any;
+    /**
+     * Sets or retrieves the number of horizontal rows contained in the object.
+     */
+    rows: HTMLCollectionOf<HTMLTableRowElement>;
+    /**
+     * Sets or retrieves which dividing lines (inner borders) are displayed.
+     */
+    rules: string;
+    /**
+     * Sets or retrieves a description and/or structure of the object.
+     */
+    summary: string;
+    /**
+     * Retrieves a collection of all tBody objects in the table. Objects in this collection are in source order.
+     */
+    tBodies: HTMLCollectionOf<HTMLTableSectionElement>;
+    /**
+     * Retrieves the tFoot object of the table.
+     */
+    tFoot: HTMLTableSectionElement;
+    /**
+     * Retrieves the tHead object of the table.
+     */
+    tHead: HTMLTableSectionElement;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: string;
+    /**
+     * Creates an empty caption element in the table.
+     */
+    createCaption(): HTMLTableCaptionElement;
+    /**
+     * Creates an empty tBody element in the table.
+     */
+    createTBody(): HTMLTableSectionElement;
+    /**
+     * Creates an empty tFoot element in the table.
+     */
+    createTFoot(): HTMLTableSectionElement;
+    /**
+     * Returns the tHead element object if successful, or null otherwise.
+     */
+    createTHead(): HTMLTableSectionElement;
+    /**
+     * Deletes the caption element and its contents from the table.
+     */
+    deleteCaption(): void;
+    /**
+     * Removes the specified row (tr) from the element and from the rows collection.
+     * @param index Number that specifies the zero-based position in the rows collection of the row to remove.
+     */
+    deleteRow(index?: number): void;
+    /**
+     * Deletes the tFoot element and its contents from the table.
+     */
+    deleteTFoot(): void;
+    /**
+     * Deletes the tHead element and its contents from the table.
+     */
+    deleteTHead(): void;
+    /**
+     * Creates a new row (tr) in the table, and adds the row to the rows collection.
+     * @param index Number that specifies where to insert the row in the rows collection. The default value is -1, which appends the new row to the end of the rows collection.
+     */
+    insertRow(index?: number): HTMLTableRowElement;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTableElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTableElement: {
+    prototype: HTMLTableElement;
+    new(): HTMLTableElement;
+};
+
+interface HTMLTableHeaderCellElement extends HTMLTableCellElement {
+    /**
+     * Sets or retrieves the group of cells in a table to which the object's information applies.
+     */
+    scope: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTableHeaderCellElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTableHeaderCellElement: {
+    prototype: HTMLTableHeaderCellElement;
+    new(): HTMLTableHeaderCellElement;
+};
+
+interface HTMLTableRowElement extends HTMLElement, HTMLTableAlignment {
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    bgColor: any;
+    /**
+     * Retrieves a collection of all cells in the table row.
+     */
+    cells: HTMLCollectionOf<HTMLTableDataCellElement | HTMLTableHeaderCellElement>;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: any;
+    /**
+     * Retrieves the position of the object in the rows collection for the table.
+     */
+    readonly rowIndex: number;
+    /**
+     * Retrieves the position of the object in the collection.
+     */
+    readonly sectionRowIndex: number;
+    /**
+     * Removes the specified cell from the table row, as well as from the cells collection.
+     * @param index Number that specifies the zero-based position of the cell to remove from the table row. If no value is provided, the last cell in the cells collection is deleted.
+     */
+    deleteCell(index?: number): void;
+    /**
+     * Creates a new cell in the table row, and adds the cell to the cells collection.
+     * @param index Number that specifies where to insert the cell in the tr. The default value is -1, which appends the new cell to the end of the cells collection.
+     */
+    insertCell(index?: number): HTMLTableDataCellElement;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTableRowElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTableRowElement: {
+    prototype: HTMLTableRowElement;
+    new(): HTMLTableRowElement;
+};
+
+interface HTMLTableSectionElement extends HTMLElement, HTMLTableAlignment {
+    /**
+     * Sets or retrieves a value that indicates the table alignment.
+     */
+    align: string;
+    /**
+     * Sets or retrieves the number of horizontal rows contained in the object.
+     */
+    rows: HTMLCollectionOf<HTMLTableRowElement>;
+    /**
+     * Removes the specified row (tr) from the element and from the rows collection.
+     * @param index Number that specifies the zero-based position in the rows collection of the row to remove.
+     */
+    deleteRow(index?: number): void;
+    /**
+     * Creates a new row (tr) in the table, and adds the row to the rows collection.
+     * @param index Number that specifies where to insert the row in the rows collection. The default value is -1, which appends the new row to the end of the rows collection.
+     */
+    insertRow(index?: number): HTMLTableRowElement;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTableSectionElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTableSectionElement: {
+    prototype: HTMLTableSectionElement;
+    new(): HTMLTableSectionElement;
+};
+
+interface HTMLTemplateElement extends HTMLElement {
+    readonly content: DocumentFragment;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTemplateElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTemplateElement: {
+    prototype: HTMLTemplateElement;
+    new(): HTMLTemplateElement;
+};
+
+interface HTMLTextAreaElement extends HTMLElement {
+    /**
+     * Provides a way to direct a user to a specific field when a document loads. This can provide both direction and convenience for a user, reducing the need to click or tab to a field when a page opens. This attribute is true when present on an element, and false when missing.
+     */
+    autofocus: boolean;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    cols: number;
+    /**
+     * Sets or retrieves the initial contents of the object.
+     */
+    defaultValue: string;
+    disabled: boolean;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Sets or retrieves the maximum number of characters that the user can enter in a text control.
+     */
+    maxLength: number;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    /**
+     * Gets or sets a text string that is displayed in an input field as a hint or prompt to users as the format or type of information they need to enter.The text appears in an input field until the user puts focus on the field.
+     */
+    placeholder: string;
+    /**
+     * Sets or retrieves the value indicated whether the content of the object is read-only.
+     */
+    readOnly: boolean;
+    /**
+     * When present, marks an element that can't be submitted without a value.
+     */
+    required: boolean;
+    /**
+     * Sets or retrieves the number of horizontal rows contained in the object.
+     */
+    rows: number;
+    /**
+     * Gets or sets the end position or offset of a text selection.
+     */
+    selectionEnd: number;
+    /**
+     * Gets or sets the starting position or offset of a text selection.
+     */
+    selectionStart: number;
+    /**
+     * Sets or retrieves the value indicating whether the control is selected.
+     */
+    status: any;
+    /**
+     * Retrieves the type of control.
+     */
+    readonly type: string;
+    /**
+     * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
+     */
+    readonly validationMessage: string;
+    /**
+     * Returns a  ValidityState object that represents the validity states of an element.
+     */
+    readonly validity: ValidityState;
+    /**
+     * Retrieves or sets the text in the entry field of the textArea element.
+     */
+    value: string;
+    /**
+     * Returns whether an element will successfully validate based on forms validation rules and constraints.
+     */
+    readonly willValidate: boolean;
+    /**
+     * Sets or retrieves how to handle wordwrapping in the object.
+     */
+    wrap: string;
+    minLength: number;
+    /**
+     * Returns whether a form will validate when it is submitted, without having to submit it.
+     */
+    checkValidity(): boolean;
+    /**
+     * Highlights the input area of a form element.
+     */
+    select(): void;
+    /**
+     * Sets a custom error message that is displayed when a form is submitted.
+     * @param error Sets a custom error message that is displayed when a form is submitted.
+     */
+    setCustomValidity(error: string): void;
+    /**
+     * Sets the start and end positions of a selection in a text field.
+     * @param start The offset into the text field for the start of the selection.
+     * @param end The offset into the text field for the end of the selection.
+     */
+    setSelectionRange(start: number, end: number): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTextAreaElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTextAreaElement: {
+    prototype: HTMLTextAreaElement;
+    new(): HTMLTextAreaElement;
+};
+
+interface HTMLTimeElement extends HTMLElement {
+    dateTime: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTimeElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTimeElement: {
+    prototype: HTMLTimeElement;
+    new(): HTMLTimeElement;
+};
+
+interface HTMLTitleElement extends HTMLElement {
+    /**
+     * Retrieves or sets the text of the object as a string.
+     */
+    text: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTitleElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTitleElement: {
+    prototype: HTMLTitleElement;
+    new(): HTMLTitleElement;
+};
+
+interface HTMLTrackElement extends HTMLElement {
+    default: boolean;
+    kind: string;
+    label: string;
+    readonly readyState: number;
+    src: string;
+    srclang: string;
+    readonly track: TextTrack;
+    readonly ERROR: number;
+    readonly LOADED: number;
+    readonly LOADING: number;
+    readonly NONE: number;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTrackElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTrackElement: {
+    prototype: HTMLTrackElement;
+    new(): HTMLTrackElement;
+    readonly ERROR: number;
+    readonly LOADED: number;
+    readonly LOADING: number;
+    readonly NONE: number;
+};
+
+interface HTMLUListElement extends HTMLElement {
+    compact: boolean;
+    type: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLUListElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLUListElement: {
+    prototype: HTMLUListElement;
+    new(): HTMLUListElement;
+};
+
+interface HTMLUnknownElement extends HTMLElement {
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLUnknownElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLUnknownElement: {
+    prototype: HTMLUnknownElement;
+    new(): HTMLUnknownElement;
+};
+
+interface HTMLVideoElementEventMap extends HTMLMediaElementEventMap {
+    "MSVideoFormatChanged": Event;
+    "MSVideoFrameStepCompleted": Event;
+    "MSVideoOptimalLayoutChanged": Event;
+}
+
+interface HTMLVideoElement extends HTMLMediaElement {
+    /**
+     * Gets or sets the height of the video element.
+     */
+    height: number;
+    msHorizontalMirror: boolean;
+    readonly msIsLayoutOptimalForPlayback: boolean;
+    readonly msIsStereo3D: boolean;
+    msStereo3DPackingMode: string;
+    msStereo3DRenderMode: string;
+    msZoom: boolean;
+    onMSVideoFormatChanged: (this: HTMLVideoElement, ev: Event) => any;
+    onMSVideoFrameStepCompleted: (this: HTMLVideoElement, ev: Event) => any;
+    onMSVideoOptimalLayoutChanged: (this: HTMLVideoElement, ev: Event) => any;
+    /**
+     * Gets or sets a URL of an image to display, for example, like a movie poster. This can be a still frame from the video, or another image if no video data is available.
+     */
+    poster: string;
+    /**
+     * Gets the intrinsic height of a video in CSS pixels, or zero if the dimensions are not known.
+     */
+    readonly videoHeight: number;
+    /**
+     * Gets the intrinsic width of a video in CSS pixels, or zero if the dimensions are not known.
+     */
+    readonly videoWidth: number;
+    readonly webkitDisplayingFullscreen: boolean;
+    readonly webkitSupportsFullscreen: boolean;
+    /**
+     * Gets or sets the width of the video element.
+     */
+    width: number;
+    getVideoPlaybackQuality(): VideoPlaybackQuality;
+    msFrameStep(forward: boolean): void;
+    msInsertVideoEffect(activatableClassId: string, effectRequired: boolean, config?: any): void;
+    msSetVideoRectangle(left: number, top: number, right: number, bottom: number): void;
+    webkitEnterFullscreen(): void;
+    webkitEnterFullScreen(): void;
+    webkitExitFullscreen(): void;
+    webkitExitFullScreen(): void;
+    addEventListener<K extends keyof HTMLVideoElementEventMap>(type: K, listener: (this: HTMLVideoElement, ev: HTMLVideoElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLVideoElement: {
+    prototype: HTMLVideoElement;
+    new(): HTMLVideoElement;
+};
+
+interface IDBCursor {
+    readonly direction: IDBCursorDirection;
+    key: IDBKeyRange | IDBValidKey;
+    readonly primaryKey: any;
+    source: IDBObjectStore | IDBIndex;
+    advance(count: number): void;
+    continue(key?: IDBKeyRange | IDBValidKey): void;
+    delete(): IDBRequest;
+    update(value: any): IDBRequest;
+    readonly NEXT: string;
+    readonly NEXT_NO_DUPLICATE: string;
+    readonly PREV: string;
+    readonly PREV_NO_DUPLICATE: string;
+}
+
+declare var IDBCursor: {
+    prototype: IDBCursor;
+    new(): IDBCursor;
+    readonly NEXT: string;
+    readonly NEXT_NO_DUPLICATE: string;
+    readonly PREV: string;
+    readonly PREV_NO_DUPLICATE: string;
+};
+
+interface IDBCursorWithValue extends IDBCursor {
+    readonly value: any;
+}
+
+declare var IDBCursorWithValue: {
+    prototype: IDBCursorWithValue;
+    new(): IDBCursorWithValue;
+};
+
+interface IDBDatabaseEventMap {
+    "abort": Event;
+    "error": Event;
+}
+
+interface IDBDatabase extends EventTarget {
+    readonly name: string;
+    readonly objectStoreNames: DOMStringList;
+    onabort: (this: IDBDatabase, ev: Event) => any;
+    onerror: (this: IDBDatabase, ev: Event) => any;
+    version: number;
+    onversionchange: (ev: IDBVersionChangeEvent) => any;
+    close(): void;
+    createObjectStore(name: string, optionalParameters?: IDBObjectStoreParameters): IDBObjectStore;
+    deleteObjectStore(name: string): void;
+    transaction(storeNames: string | string[], mode?: IDBTransactionMode): IDBTransaction;
+    addEventListener(type: "versionchange", listener: (ev: IDBVersionChangeEvent) => any, useCapture?: boolean): void;
+    addEventListener<K extends keyof IDBDatabaseEventMap>(type: K, listener: (this: IDBDatabase, ev: IDBDatabaseEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var IDBDatabase: {
+    prototype: IDBDatabase;
+    new(): IDBDatabase;
+};
+
+interface IDBFactory {
+    cmp(first: any, second: any): number;
+    deleteDatabase(name: string): IDBOpenDBRequest;
+    open(name: string, version?: number): IDBOpenDBRequest;
+}
+
+declare var IDBFactory: {
+    prototype: IDBFactory;
+    new(): IDBFactory;
+};
+
+interface IDBIndex {
+    keyPath: string | string[];
+    readonly name: string;
+    readonly objectStore: IDBObjectStore;
+    readonly unique: boolean;
+    multiEntry: boolean;
+    count(key?: IDBKeyRange | IDBValidKey): IDBRequest;
+    get(key: IDBKeyRange | IDBValidKey): IDBRequest;
+    getKey(key: IDBKeyRange | IDBValidKey): IDBRequest;
+    openCursor(range?: IDBKeyRange | IDBValidKey, direction?: IDBCursorDirection): IDBRequest;
+    openKeyCursor(range?: IDBKeyRange | IDBValidKey, direction?: IDBCursorDirection): IDBRequest;
+}
+
+declare var IDBIndex: {
+    prototype: IDBIndex;
+    new(): IDBIndex;
+};
+
+interface IDBKeyRange {
+    readonly lower: any;
+    readonly lowerOpen: boolean;
+    readonly upper: any;
+    readonly upperOpen: boolean;
+}
+
+declare var IDBKeyRange: {
+    prototype: IDBKeyRange;
+    new(): IDBKeyRange;
+    bound(lower: any, upper: any, lowerOpen?: boolean, upperOpen?: boolean): IDBKeyRange;
+    lowerBound(lower: any, open?: boolean): IDBKeyRange;
+    only(value: any): IDBKeyRange;
+    upperBound(upper: any, open?: boolean): IDBKeyRange;
+};
+
+interface IDBObjectStore {
+    readonly indexNames: DOMStringList;
+    keyPath: string | string[];
+    readonly name: string;
+    readonly transaction: IDBTransaction;
+    autoIncrement: boolean;
+    add(value: any, key?: IDBKeyRange | IDBValidKey): IDBRequest;
+    clear(): IDBRequest;
+    count(key?: IDBKeyRange | IDBValidKey): IDBRequest;
+    createIndex(name: string, keyPath: string | string[], optionalParameters?: IDBIndexParameters): IDBIndex;
+    delete(key: IDBKeyRange | IDBValidKey): IDBRequest;
+    deleteIndex(indexName: string): void;
+    get(key: any): IDBRequest;
+    index(name: string): IDBIndex;
+    openCursor(range?: IDBKeyRange | IDBValidKey, direction?: IDBCursorDirection): IDBRequest;
+    put(value: any, key?: IDBKeyRange | IDBValidKey): IDBRequest;
+}
+
+declare var IDBObjectStore: {
+    prototype: IDBObjectStore;
+    new(): IDBObjectStore;
+};
+
+interface IDBOpenDBRequestEventMap extends IDBRequestEventMap {
+    "blocked": Event;
+    "upgradeneeded": IDBVersionChangeEvent;
+}
+
+interface IDBOpenDBRequest extends IDBRequest {
+    onblocked: (this: IDBOpenDBRequest, ev: Event) => any;
+    onupgradeneeded: (this: IDBOpenDBRequest, ev: IDBVersionChangeEvent) => any;
+    addEventListener<K extends keyof IDBOpenDBRequestEventMap>(type: K, listener: (this: IDBOpenDBRequest, ev: IDBOpenDBRequestEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var IDBOpenDBRequest: {
+    prototype: IDBOpenDBRequest;
+    new(): IDBOpenDBRequest;
+};
+
+interface IDBRequestEventMap {
+    "error": Event;
+    "success": Event;
+}
+
+interface IDBRequest extends EventTarget {
+    readonly error: DOMException;
+    onerror: (this: IDBRequest, ev: Event) => any;
+    onsuccess: (this: IDBRequest, ev: Event) => any;
+    readonly readyState: IDBRequestReadyState;
+    readonly result: any;
+    source: IDBObjectStore | IDBIndex | IDBCursor;
+    readonly transaction: IDBTransaction;
+    addEventListener<K extends keyof IDBRequestEventMap>(type: K, listener: (this: IDBRequest, ev: IDBRequestEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var IDBRequest: {
+    prototype: IDBRequest;
+    new(): IDBRequest;
+};
+
+interface IDBTransactionEventMap {
+    "abort": Event;
+    "complete": Event;
+    "error": Event;
+}
+
+interface IDBTransaction extends EventTarget {
+    readonly db: IDBDatabase;
+    readonly error: DOMException;
+    readonly mode: IDBTransactionMode;
+    onabort: (this: IDBTransaction, ev: Event) => any;
+    oncomplete: (this: IDBTransaction, ev: Event) => any;
+    onerror: (this: IDBTransaction, ev: Event) => any;
+    abort(): void;
+    objectStore(name: string): IDBObjectStore;
+    readonly READ_ONLY: string;
+    readonly READ_WRITE: string;
+    readonly VERSION_CHANGE: string;
+    addEventListener<K extends keyof IDBTransactionEventMap>(type: K, listener: (this: IDBTransaction, ev: IDBTransactionEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var IDBTransaction: {
+    prototype: IDBTransaction;
+    new(): IDBTransaction;
+    readonly READ_ONLY: string;
+    readonly READ_WRITE: string;
+    readonly VERSION_CHANGE: string;
+};
+
+interface IDBVersionChangeEvent extends Event {
+    readonly newVersion: number | null;
+    readonly oldVersion: number;
+}
+
+declare var IDBVersionChangeEvent: {
+    prototype: IDBVersionChangeEvent;
+    new(): IDBVersionChangeEvent;
+};
+
+interface IIRFilterNode extends AudioNode {
+    getFrequencyResponse(frequencyHz: Float32Array, magResponse: Float32Array, phaseResponse: Float32Array): void;
+}
+
+declare var IIRFilterNode: {
+    prototype: IIRFilterNode;
+    new(): IIRFilterNode;
+};
+
+interface ImageData {
+    data: Uint8ClampedArray;
+    readonly height: number;
+    readonly width: number;
+}
+
+declare var ImageData: {
+    prototype: ImageData;
+    new(width: number, height: number): ImageData;
+    new(array: Uint8ClampedArray, width: number, height: number): ImageData;
+};
+
+interface IntersectionObserver {
+    readonly root: Element | null;
+    readonly rootMargin: string;
+    readonly thresholds: number[];
+    disconnect(): void;
+    observe(target: Element): void;
+    takeRecords(): IntersectionObserverEntry[];
+    unobserve(target: Element): void;
+}
+
+declare var IntersectionObserver: {
+    prototype: IntersectionObserver;
+    new(callback: IntersectionObserverCallback, options?: IntersectionObserverInit): IntersectionObserver;
+};
+
+interface IntersectionObserverEntry {
+    readonly boundingClientRect: ClientRect;
+    readonly intersectionRatio: number;
+    readonly intersectionRect: ClientRect;
+    readonly rootBounds: ClientRect;
+    readonly target: Element;
+    readonly time: number;
+}
+
+declare var IntersectionObserverEntry: {
+    prototype: IntersectionObserverEntry;
+    new(intersectionObserverEntryInit: IntersectionObserverEntryInit): IntersectionObserverEntry;
+};
+
+interface KeyboardEvent extends UIEvent {
+    readonly altKey: boolean;
+    readonly char: string | null;
+    readonly charCode: number;
+    readonly ctrlKey: boolean;
+    readonly key: string;
+    readonly keyCode: number;
+    readonly locale: string;
+    readonly location: number;
+    readonly metaKey: boolean;
+    readonly repeat: boolean;
+    readonly shiftKey: boolean;
+    readonly which: number;
+    readonly code: string;
+    getModifierState(keyArg: string): boolean;
+    initKeyboardEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, keyArg: string, locationArg: number, modifiersListArg: string, repeat: boolean, locale: string): void;
+    readonly DOM_KEY_LOCATION_JOYSTICK: number;
+    readonly DOM_KEY_LOCATION_LEFT: number;
+    readonly DOM_KEY_LOCATION_MOBILE: number;
+    readonly DOM_KEY_LOCATION_NUMPAD: number;
+    readonly DOM_KEY_LOCATION_RIGHT: number;
+    readonly DOM_KEY_LOCATION_STANDARD: number;
+}
+
+declare var KeyboardEvent: {
+    prototype: KeyboardEvent;
+    new(typeArg: string, eventInitDict?: KeyboardEventInit): KeyboardEvent;
+    readonly DOM_KEY_LOCATION_JOYSTICK: number;
+    readonly DOM_KEY_LOCATION_LEFT: number;
+    readonly DOM_KEY_LOCATION_MOBILE: number;
+    readonly DOM_KEY_LOCATION_NUMPAD: number;
+    readonly DOM_KEY_LOCATION_RIGHT: number;
+    readonly DOM_KEY_LOCATION_STANDARD: number;
+};
+
+interface ListeningStateChangedEvent extends Event {
+    readonly label: string;
+    readonly state: ListeningState;
+}
+
+declare var ListeningStateChangedEvent: {
+    prototype: ListeningStateChangedEvent;
+    new(): ListeningStateChangedEvent;
+};
+
+interface Location {
+    hash: string;
+    host: string;
+    hostname: string;
+    href: string;
+    readonly origin: string;
+    pathname: string;
+    port: string;
+    protocol: string;
+    search: string;
+    assign(url: string): void;
+    reload(forcedReload?: boolean): void;
+    replace(url: string): void;
+    toString(): string;
+}
+
+declare var Location: {
+    prototype: Location;
+    new(): Location;
+};
+
+interface LongRunningScriptDetectedEvent extends Event {
+    readonly executionTime: number;
+    stopPageScriptExecution: boolean;
+}
+
+declare var LongRunningScriptDetectedEvent: {
+    prototype: LongRunningScriptDetectedEvent;
+    new(): LongRunningScriptDetectedEvent;
+};
+
+interface MediaDeviceInfo {
+    readonly deviceId: string;
+    readonly groupId: string;
+    readonly kind: MediaDeviceKind;
+    readonly label: string;
+}
+
+declare var MediaDeviceInfo: {
+    prototype: MediaDeviceInfo;
+    new(): MediaDeviceInfo;
+};
+
+interface MediaDevicesEventMap {
+    "devicechange": Event;
+}
+
+interface MediaDevices extends EventTarget {
+    ondevicechange: (this: MediaDevices, ev: Event) => any;
+    enumerateDevices(): any;
+    getSupportedConstraints(): MediaTrackSupportedConstraints;
+    getUserMedia(constraints: MediaStreamConstraints): Promise<MediaStream>;
+    addEventListener<K extends keyof MediaDevicesEventMap>(type: K, listener: (this: MediaDevices, ev: MediaDevicesEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MediaDevices: {
+    prototype: MediaDevices;
+    new(): MediaDevices;
+};
+
+interface MediaElementAudioSourceNode extends AudioNode {
+}
+
+declare var MediaElementAudioSourceNode: {
+    prototype: MediaElementAudioSourceNode;
+    new(): MediaElementAudioSourceNode;
+};
+
+interface MediaEncryptedEvent extends Event {
+    readonly initData: ArrayBuffer | null;
+    readonly initDataType: string;
+}
+
+declare var MediaEncryptedEvent: {
+    prototype: MediaEncryptedEvent;
+    new(type: string, eventInitDict?: MediaEncryptedEventInit): MediaEncryptedEvent;
+};
+
+interface MediaError {
+    readonly code: number;
+    readonly msExtendedCode: number;
+    readonly MEDIA_ERR_ABORTED: number;
+    readonly MEDIA_ERR_DECODE: number;
+    readonly MEDIA_ERR_NETWORK: number;
+    readonly MEDIA_ERR_SRC_NOT_SUPPORTED: number;
+    readonly MS_MEDIA_ERR_ENCRYPTED: number;
+}
+
+declare var MediaError: {
+    prototype: MediaError;
+    new(): MediaError;
+    readonly MEDIA_ERR_ABORTED: number;
+    readonly MEDIA_ERR_DECODE: number;
+    readonly MEDIA_ERR_NETWORK: number;
+    readonly MEDIA_ERR_SRC_NOT_SUPPORTED: number;
+    readonly MS_MEDIA_ERR_ENCRYPTED: number;
+};
+
+interface MediaKeyMessageEvent extends Event {
+    readonly message: ArrayBuffer;
+    readonly messageType: MediaKeyMessageType;
+}
+
+declare var MediaKeyMessageEvent: {
+    prototype: MediaKeyMessageEvent;
+    new(type: string, eventInitDict?: MediaKeyMessageEventInit): MediaKeyMessageEvent;
+};
+
+interface MediaKeys {
+    createSession(sessionType?: MediaKeySessionType): MediaKeySession;
+    setServerCertificate(serverCertificate: any): Promise<void>;
+}
+
+declare var MediaKeys: {
+    prototype: MediaKeys;
+    new(): MediaKeys;
+};
+
+interface MediaKeySession extends EventTarget {
+    readonly closed: Promise<void>;
+    readonly expiration: number;
+    readonly keyStatuses: MediaKeyStatusMap;
+    readonly sessionId: string;
+    close(): Promise<void>;
+    generateRequest(initDataType: string, initData: any): Promise<void>;
+    load(sessionId: string): Promise<boolean>;
+    remove(): Promise<void>;
+    update(response: any): Promise<void>;
+}
+
+declare var MediaKeySession: {
+    prototype: MediaKeySession;
+    new(): MediaKeySession;
+};
+
+interface MediaKeyStatusMap {
+    readonly size: number;
+    forEach(callback: ForEachCallback): void;
+    get(keyId: any): MediaKeyStatus;
+    has(keyId: any): boolean;
+}
+
+declare var MediaKeyStatusMap: {
+    prototype: MediaKeyStatusMap;
+    new(): MediaKeyStatusMap;
+};
+
+interface MediaKeySystemAccess {
+    readonly keySystem: string;
+    createMediaKeys(): Promise<MediaKeys>;
+    getConfiguration(): MediaKeySystemConfiguration;
+}
+
+declare var MediaKeySystemAccess: {
+    prototype: MediaKeySystemAccess;
+    new(): MediaKeySystemAccess;
+};
+
+interface MediaList {
+    readonly length: number;
+    mediaText: string;
+    appendMedium(newMedium: string): void;
+    deleteMedium(oldMedium: string): void;
+    item(index: number): string;
+    toString(): string;
+    [index: number]: string;
+}
+
+declare var MediaList: {
+    prototype: MediaList;
+    new(): MediaList;
+};
+
+interface MediaQueryList {
+    readonly matches: boolean;
+    readonly media: string;
+    addListener(listener: MediaQueryListListener): void;
+    removeListener(listener: MediaQueryListListener): void;
+}
+
+declare var MediaQueryList: {
+    prototype: MediaQueryList;
+    new(): MediaQueryList;
+};
+
+interface MediaSource extends EventTarget {
+    readonly activeSourceBuffers: SourceBufferList;
+    duration: number;
+    readonly readyState: string;
+    readonly sourceBuffers: SourceBufferList;
+    addSourceBuffer(type: string): SourceBuffer;
+    endOfStream(error?: number): void;
+    removeSourceBuffer(sourceBuffer: SourceBuffer): void;
+}
+
+declare var MediaSource: {
+    prototype: MediaSource;
+    new(): MediaSource;
+    isTypeSupported(type: string): boolean;
+};
+
+interface MediaStreamEventMap {
+    "active": Event;
+    "addtrack": MediaStreamTrackEvent;
+    "inactive": Event;
+    "removetrack": MediaStreamTrackEvent;
+}
+
+interface MediaStream extends EventTarget {
+    readonly active: boolean;
+    readonly id: string;
+    onactive: (this: MediaStream, ev: Event) => any;
+    onaddtrack: (this: MediaStream, ev: MediaStreamTrackEvent) => any;
+    oninactive: (this: MediaStream, ev: Event) => any;
+    onremovetrack: (this: MediaStream, ev: MediaStreamTrackEvent) => any;
+    addTrack(track: MediaStreamTrack): void;
+    clone(): MediaStream;
+    getAudioTracks(): MediaStreamTrack[];
+    getTrackById(trackId: string): MediaStreamTrack | null;
+    getTracks(): MediaStreamTrack[];
+    getVideoTracks(): MediaStreamTrack[];
+    removeTrack(track: MediaStreamTrack): void;
+    stop(): void;
+    addEventListener<K extends keyof MediaStreamEventMap>(type: K, listener: (this: MediaStream, ev: MediaStreamEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MediaStream: {
+    prototype: MediaStream;
+    new(streamOrTracks?: MediaStream | MediaStreamTrack[]): MediaStream;
+};
+
+interface MediaStreamAudioSourceNode extends AudioNode {
+}
+
+declare var MediaStreamAudioSourceNode: {
+    prototype: MediaStreamAudioSourceNode;
+    new(): MediaStreamAudioSourceNode;
+};
+
+interface MediaStreamError {
+    readonly constraintName: string | null;
+    readonly message: string | null;
+    readonly name: string;
+}
+
+declare var MediaStreamError: {
+    prototype: MediaStreamError;
+    new(): MediaStreamError;
+};
+
+interface MediaStreamErrorEvent extends Event {
+    readonly error: MediaStreamError | null;
+}
+
+declare var MediaStreamErrorEvent: {
+    prototype: MediaStreamErrorEvent;
+    new(typeArg: string, eventInitDict?: MediaStreamErrorEventInit): MediaStreamErrorEvent;
+};
+
+interface MediaStreamEvent extends Event {
+    readonly stream: MediaStream | null;
+}
+
+declare var MediaStreamEvent: {
+    prototype: MediaStreamEvent;
+    new(type: string, eventInitDict: MediaStreamEventInit): MediaStreamEvent;
+};
+
+interface MediaStreamTrackEventMap {
+    "ended": MediaStreamErrorEvent;
+    "mute": Event;
+    "overconstrained": MediaStreamErrorEvent;
+    "unmute": Event;
+}
+
+interface MediaStreamTrack extends EventTarget {
+    enabled: boolean;
+    readonly id: string;
+    readonly kind: string;
+    readonly label: string;
+    readonly muted: boolean;
+    onended: (this: MediaStreamTrack, ev: MediaStreamErrorEvent) => any;
+    onmute: (this: MediaStreamTrack, ev: Event) => any;
+    onoverconstrained: (this: MediaStreamTrack, ev: MediaStreamErrorEvent) => any;
+    onunmute: (this: MediaStreamTrack, ev: Event) => any;
+    readonly readonly: boolean;
+    readonly readyState: MediaStreamTrackState;
+    readonly remote: boolean;
+    applyConstraints(constraints: MediaTrackConstraints): Promise<void>;
+    clone(): MediaStreamTrack;
+    getCapabilities(): MediaTrackCapabilities;
+    getConstraints(): MediaTrackConstraints;
+    getSettings(): MediaTrackSettings;
+    stop(): void;
+    addEventListener<K extends keyof MediaStreamTrackEventMap>(type: K, listener: (this: MediaStreamTrack, ev: MediaStreamTrackEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MediaStreamTrack: {
+    prototype: MediaStreamTrack;
+    new(): MediaStreamTrack;
+};
+
+interface MediaStreamTrackEvent extends Event {
+    readonly track: MediaStreamTrack;
+}
+
+declare var MediaStreamTrackEvent: {
+    prototype: MediaStreamTrackEvent;
+    new(typeArg: string, eventInitDict?: MediaStreamTrackEventInit): MediaStreamTrackEvent;
+};
+
+interface MessageChannel {
+    readonly port1: MessagePort;
+    readonly port2: MessagePort;
+}
+
+declare var MessageChannel: {
+    prototype: MessageChannel;
+    new(): MessageChannel;
+};
+
+interface MessageEvent extends Event {
+    readonly data: any;
+    readonly origin: string;
+    readonly ports: any;
+    readonly source: Window;
+    initMessageEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, dataArg: any, originArg: string, lastEventIdArg: string, sourceArg: Window): void;
+}
+
+declare var MessageEvent: {
+    prototype: MessageEvent;
+    new(type: string, eventInitDict?: MessageEventInit): MessageEvent;
+};
+
+interface MessagePortEventMap {
+    "message": MessageEvent;
+}
+
+interface MessagePort extends EventTarget {
+    onmessage: (this: MessagePort, ev: MessageEvent) => any;
+    close(): void;
+    postMessage(message?: any, transfer?: any[]): void;
+    start(): void;
+    addEventListener<K extends keyof MessagePortEventMap>(type: K, listener: (this: MessagePort, ev: MessagePortEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MessagePort: {
+    prototype: MessagePort;
+    new(): MessagePort;
+};
+
+interface MimeType {
+    readonly description: string;
+    readonly enabledPlugin: Plugin;
+    readonly suffixes: string;
+    readonly type: string;
+}
+
+declare var MimeType: {
+    prototype: MimeType;
+    new(): MimeType;
+};
+
+interface MimeTypeArray {
+    readonly length: number;
+    item(index: number): Plugin;
+    namedItem(type: string): Plugin;
+    [index: number]: Plugin;
+}
+
+declare var MimeTypeArray: {
+    prototype: MimeTypeArray;
+    new(): MimeTypeArray;
+};
+
+interface MouseEvent extends UIEvent {
+    readonly altKey: boolean;
+    readonly button: number;
+    readonly buttons: number;
+    readonly clientX: number;
+    readonly clientY: number;
+    readonly ctrlKey: boolean;
+    readonly fromElement: Element;
+    readonly layerX: number;
+    readonly layerY: number;
+    readonly metaKey: boolean;
+    readonly movementX: number;
+    readonly movementY: number;
+    readonly offsetX: number;
+    readonly offsetY: number;
+    readonly pageX: number;
+    readonly pageY: number;
+    readonly relatedTarget: EventTarget;
+    readonly screenX: number;
+    readonly screenY: number;
+    readonly shiftKey: boolean;
+    readonly toElement: Element;
+    readonly which: number;
+    readonly x: number;
+    readonly y: number;
+    getModifierState(keyArg: string): boolean;
+    initMouseEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, ctrlKeyArg: boolean, altKeyArg: boolean, shiftKeyArg: boolean, metaKeyArg: boolean, buttonArg: number, relatedTargetArg: EventTarget | null): void;
+}
+
+declare var MouseEvent: {
+    prototype: MouseEvent;
+    new(typeArg: string, eventInitDict?: MouseEventInit): MouseEvent;
+};
+
+interface MSApp {
+    clearTemporaryWebDataAsync(): MSAppAsyncOperation;
+    createBlobFromRandomAccessStream(type: string, seeker: any): Blob;
+    createDataPackage(object: any): any;
+    createDataPackageFromSelection(): any;
+    createFileFromStorageFile(storageFile: any): File;
+    createStreamFromInputStream(type: string, inputStream: any): MSStream;
+    execAsyncAtPriority(asynchronousCallback: MSExecAtPriorityFunctionCallback, priority: string, ...args: any[]): void;
+    execAtPriority(synchronousCallback: MSExecAtPriorityFunctionCallback, priority: string, ...args: any[]): any;
+    getCurrentPriority(): string;
+    getHtmlPrintDocumentSourceAsync(htmlDoc: any): Promise<any>;
+    getViewId(view: any): any;
+    isTaskScheduledAtPriorityOrHigher(priority: string): boolean;
+    pageHandlesAllApplicationActivations(enabled: boolean): void;
+    suppressSubdownloadCredentialPrompts(suppress: boolean): void;
+    terminateApp(exceptionObject: any): void;
+    readonly CURRENT: string;
+    readonly HIGH: string;
+    readonly IDLE: string;
+    readonly NORMAL: string;
+}
+declare var MSApp: MSApp;
+
+interface MSAppAsyncOperationEventMap {
+    "complete": Event;
+    "error": Event;
+}
+
+interface MSAppAsyncOperation extends EventTarget {
+    readonly error: DOMError;
+    oncomplete: (this: MSAppAsyncOperation, ev: Event) => any;
+    onerror: (this: MSAppAsyncOperation, ev: Event) => any;
+    readonly readyState: number;
+    readonly result: any;
+    start(): void;
+    readonly COMPLETED: number;
+    readonly ERROR: number;
+    readonly STARTED: number;
+    addEventListener<K extends keyof MSAppAsyncOperationEventMap>(type: K, listener: (this: MSAppAsyncOperation, ev: MSAppAsyncOperationEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MSAppAsyncOperation: {
+    prototype: MSAppAsyncOperation;
+    new(): MSAppAsyncOperation;
+    readonly COMPLETED: number;
+    readonly ERROR: number;
+    readonly STARTED: number;
+};
+
+interface MSAssertion {
+    readonly id: string;
+    readonly type: MSCredentialType;
+}
+
+declare var MSAssertion: {
+    prototype: MSAssertion;
+    new(): MSAssertion;
+};
+
+interface MSBlobBuilder {
+    append(data: any, endings?: string): void;
+    getBlob(contentType?: string): Blob;
+}
+
+declare var MSBlobBuilder: {
+    prototype: MSBlobBuilder;
+    new(): MSBlobBuilder;
+};
+
+interface MSCredentials {
+    getAssertion(challenge: string, filter?: MSCredentialFilter, params?: MSSignatureParameters): Promise<MSAssertion>;
+    makeCredential(accountInfo: MSAccountInfo, params: MSCredentialParameters[], challenge?: string): Promise<MSAssertion>;
+}
+
+declare var MSCredentials: {
+    prototype: MSCredentials;
+    new(): MSCredentials;
+};
+
+interface MSFIDOCredentialAssertion extends MSAssertion {
+    readonly algorithm: string | Algorithm;
+    readonly attestation: any;
+    readonly publicKey: string;
+    readonly transportHints: MSTransportType[];
+}
+
+declare var MSFIDOCredentialAssertion: {
+    prototype: MSFIDOCredentialAssertion;
+    new(): MSFIDOCredentialAssertion;
+};
+
+interface MSFIDOSignature {
+    readonly authnrData: string;
+    readonly clientData: string;
+    readonly signature: string;
+}
+
+declare var MSFIDOSignature: {
+    prototype: MSFIDOSignature;
+    new(): MSFIDOSignature;
+};
+
+interface MSFIDOSignatureAssertion extends MSAssertion {
+    readonly signature: MSFIDOSignature;
+}
+
+declare var MSFIDOSignatureAssertion: {
+    prototype: MSFIDOSignatureAssertion;
+    new(): MSFIDOSignatureAssertion;
+};
+
+interface MSGesture {
+    target: Element;
+    addPointer(pointerId: number): void;
+    stop(): void;
+}
+
+declare var MSGesture: {
+    prototype: MSGesture;
+    new(): MSGesture;
+};
+
+interface MSGestureEvent extends UIEvent {
+    readonly clientX: number;
+    readonly clientY: number;
+    readonly expansion: number;
+    readonly gestureObject: any;
+    readonly hwTimestamp: number;
+    readonly offsetX: number;
+    readonly offsetY: number;
+    readonly rotation: number;
+    readonly scale: number;
+    readonly screenX: number;
+    readonly screenY: number;
+    readonly translationX: number;
+    readonly translationY: number;
+    readonly velocityAngular: number;
+    readonly velocityExpansion: number;
+    readonly velocityX: number;
+    readonly velocityY: number;
+    initGestureEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, offsetXArg: number, offsetYArg: number, translationXArg: number, translationYArg: number, scaleArg: number, expansionArg: number, rotationArg: number, velocityXArg: number, velocityYArg: number, velocityExpansionArg: number, velocityAngularArg: number, hwTimestampArg: number): void;
+    readonly MSGESTURE_FLAG_BEGIN: number;
+    readonly MSGESTURE_FLAG_CANCEL: number;
+    readonly MSGESTURE_FLAG_END: number;
+    readonly MSGESTURE_FLAG_INERTIA: number;
+    readonly MSGESTURE_FLAG_NONE: number;
+}
+
+declare var MSGestureEvent: {
+    prototype: MSGestureEvent;
+    new(): MSGestureEvent;
+    readonly MSGESTURE_FLAG_BEGIN: number;
+    readonly MSGESTURE_FLAG_CANCEL: number;
+    readonly MSGESTURE_FLAG_END: number;
+    readonly MSGESTURE_FLAG_INERTIA: number;
+    readonly MSGESTURE_FLAG_NONE: number;
+};
+
+interface MSGraphicsTrust {
+    readonly constrictionActive: boolean;
+    readonly status: string;
+}
+
+declare var MSGraphicsTrust: {
+    prototype: MSGraphicsTrust;
+    new(): MSGraphicsTrust;
+};
+
+interface MSHTMLWebViewElement extends HTMLElement {
+    readonly canGoBack: boolean;
+    readonly canGoForward: boolean;
+    readonly containsFullScreenElement: boolean;
+    readonly documentTitle: string;
+    height: number;
+    readonly settings: MSWebViewSettings;
+    src: string;
+    width: number;
+    addWebAllowedObject(name: string, applicationObject: any): void;
+    buildLocalStreamUri(contentIdentifier: string, relativePath: string): string;
+    capturePreviewToBlobAsync(): MSWebViewAsyncOperation;
+    captureSelectedContentToDataPackageAsync(): MSWebViewAsyncOperation;
+    getDeferredPermissionRequestById(id: number): DeferredPermissionRequest;
+    getDeferredPermissionRequests(): DeferredPermissionRequest[];
+    goBack(): void;
+    goForward(): void;
+    invokeScriptAsync(scriptName: string, ...args: any[]): MSWebViewAsyncOperation;
+    navigate(uri: string): void;
+    navigateFocus(navigationReason: NavigationReason, origin: FocusNavigationOrigin): void;
+    navigateToLocalStreamUri(source: string, streamResolver: any): void;
+    navigateToString(contents: string): void;
+    navigateWithHttpRequestMessage(requestMessage: any): void;
+    refresh(): void;
+    stop(): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: MSHTMLWebViewElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MSHTMLWebViewElement: {
+    prototype: MSHTMLWebViewElement;
+    new(): MSHTMLWebViewElement;
+};
+
+interface MSInputMethodContextEventMap {
+    "MSCandidateWindowHide": Event;
+    "MSCandidateWindowShow": Event;
+    "MSCandidateWindowUpdate": Event;
+}
+
+interface MSInputMethodContext extends EventTarget {
+    readonly compositionEndOffset: number;
+    readonly compositionStartOffset: number;
+    oncandidatewindowhide: (this: MSInputMethodContext, ev: Event) => any;
+    oncandidatewindowshow: (this: MSInputMethodContext, ev: Event) => any;
+    oncandidatewindowupdate: (this: MSInputMethodContext, ev: Event) => any;
+    readonly target: HTMLElement;
+    getCandidateWindowClientRect(): ClientRect;
+    getCompositionAlternatives(): string[];
+    hasComposition(): boolean;
+    isCandidateWindowVisible(): boolean;
+    addEventListener<K extends keyof MSInputMethodContextEventMap>(type: K, listener: (this: MSInputMethodContext, ev: MSInputMethodContextEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MSInputMethodContext: {
+    prototype: MSInputMethodContext;
+    new(): MSInputMethodContext;
+};
+
+interface MSManipulationEvent extends UIEvent {
+    readonly currentState: number;
+    readonly inertiaDestinationX: number;
+    readonly inertiaDestinationY: number;
+    readonly lastState: number;
+    initMSManipulationEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, lastState: number, currentState: number): void;
+    readonly MS_MANIPULATION_STATE_ACTIVE: number;
+    readonly MS_MANIPULATION_STATE_CANCELLED: number;
+    readonly MS_MANIPULATION_STATE_COMMITTED: number;
+    readonly MS_MANIPULATION_STATE_DRAGGING: number;
+    readonly MS_MANIPULATION_STATE_INERTIA: number;
+    readonly MS_MANIPULATION_STATE_PRESELECT: number;
+    readonly MS_MANIPULATION_STATE_SELECTING: number;
+    readonly MS_MANIPULATION_STATE_STOPPED: number;
+}
+
+declare var MSManipulationEvent: {
+    prototype: MSManipulationEvent;
+    new(): MSManipulationEvent;
+    readonly MS_MANIPULATION_STATE_ACTIVE: number;
+    readonly MS_MANIPULATION_STATE_CANCELLED: number;
+    readonly MS_MANIPULATION_STATE_COMMITTED: number;
+    readonly MS_MANIPULATION_STATE_DRAGGING: number;
+    readonly MS_MANIPULATION_STATE_INERTIA: number;
+    readonly MS_MANIPULATION_STATE_PRESELECT: number;
+    readonly MS_MANIPULATION_STATE_SELECTING: number;
+    readonly MS_MANIPULATION_STATE_STOPPED: number;
+};
+
+interface MSMediaKeyError {
+    readonly code: number;
+    readonly systemCode: number;
+    readonly MS_MEDIA_KEYERR_CLIENT: number;
+    readonly MS_MEDIA_KEYERR_DOMAIN: number;
+    readonly MS_MEDIA_KEYERR_HARDWARECHANGE: number;
+    readonly MS_MEDIA_KEYERR_OUTPUT: number;
+    readonly MS_MEDIA_KEYERR_SERVICE: number;
+    readonly MS_MEDIA_KEYERR_UNKNOWN: number;
+}
+
+declare var MSMediaKeyError: {
+    prototype: MSMediaKeyError;
+    new(): MSMediaKeyError;
+    readonly MS_MEDIA_KEYERR_CLIENT: number;
+    readonly MS_MEDIA_KEYERR_DOMAIN: number;
+    readonly MS_MEDIA_KEYERR_HARDWARECHANGE: number;
+    readonly MS_MEDIA_KEYERR_OUTPUT: number;
+    readonly MS_MEDIA_KEYERR_SERVICE: number;
+    readonly MS_MEDIA_KEYERR_UNKNOWN: number;
+};
+
+interface MSMediaKeyMessageEvent extends Event {
+    readonly destinationURL: string | null;
+    readonly message: Uint8Array;
+}
+
+declare var MSMediaKeyMessageEvent: {
+    prototype: MSMediaKeyMessageEvent;
+    new(): MSMediaKeyMessageEvent;
+};
+
+interface MSMediaKeyNeededEvent extends Event {
+    readonly initData: Uint8Array | null;
+}
+
+declare var MSMediaKeyNeededEvent: {
+    prototype: MSMediaKeyNeededEvent;
+    new(): MSMediaKeyNeededEvent;
+};
+
+interface MSMediaKeys {
+    readonly keySystem: string;
+    createSession(type: string, initData: Uint8Array, cdmData?: Uint8Array): MSMediaKeySession;
+}
+
+declare var MSMediaKeys: {
+    prototype: MSMediaKeys;
+    new(keySystem: string): MSMediaKeys;
+    isTypeSupported(keySystem: string, type?: string): boolean;
+    isTypeSupportedWithFeatures(keySystem: string, type?: string): string;
+};
+
+interface MSMediaKeySession extends EventTarget {
+    readonly error: MSMediaKeyError | null;
+    readonly keySystem: string;
+    readonly sessionId: string;
+    close(): void;
+    update(key: Uint8Array): void;
+}
+
+declare var MSMediaKeySession: {
+    prototype: MSMediaKeySession;
+    new(): MSMediaKeySession;
+};
+
+interface MSPointerEvent extends MouseEvent {
+    readonly currentPoint: any;
+    readonly height: number;
+    readonly hwTimestamp: number;
+    readonly intermediatePoints: any;
+    readonly isPrimary: boolean;
+    readonly pointerId: number;
+    readonly pointerType: any;
+    readonly pressure: number;
+    readonly rotation: number;
+    readonly tiltX: number;
+    readonly tiltY: number;
+    readonly width: number;
+    getCurrentPoint(element: Element): void;
+    getIntermediatePoints(element: Element): void;
+    initPointerEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, ctrlKeyArg: boolean, altKeyArg: boolean, shiftKeyArg: boolean, metaKeyArg: boolean, buttonArg: number, relatedTargetArg: EventTarget, offsetXArg: number, offsetYArg: number, widthArg: number, heightArg: number, pressure: number, rotation: number, tiltX: number, tiltY: number, pointerIdArg: number, pointerType: any, hwTimestampArg: number, isPrimary: boolean): void;
+}
+
+declare var MSPointerEvent: {
+    prototype: MSPointerEvent;
+    new(typeArg: string, eventInitDict?: PointerEventInit): MSPointerEvent;
+};
+
+interface MSRangeCollection {
+    readonly length: number;
+    item(index: number): Range;
+    [index: number]: Range;
+}
+
+declare var MSRangeCollection: {
+    prototype: MSRangeCollection;
+    new(): MSRangeCollection;
+};
+
+interface MSSiteModeEvent extends Event {
+    readonly actionURL: string;
+    readonly buttonID: number;
+}
+
+declare var MSSiteModeEvent: {
+    prototype: MSSiteModeEvent;
+    new(): MSSiteModeEvent;
+};
+
+interface MSStream {
+    readonly type: string;
+    msClose(): void;
+    msDetachStream(): any;
+}
+
+declare var MSStream: {
+    prototype: MSStream;
+    new(): MSStream;
+};
+
+interface MSStreamReader extends EventTarget, MSBaseReader {
+    readonly error: DOMError;
+    readAsArrayBuffer(stream: MSStream, size?: number): void;
+    readAsBinaryString(stream: MSStream, size?: number): void;
+    readAsBlob(stream: MSStream, size?: number): void;
+    readAsDataURL(stream: MSStream, size?: number): void;
+    readAsText(stream: MSStream, encoding?: string, size?: number): void;
+    addEventListener<K extends keyof MSBaseReaderEventMap>(type: K, listener: (this: MSStreamReader, ev: MSBaseReaderEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MSStreamReader: {
+    prototype: MSStreamReader;
+    new(): MSStreamReader;
+};
+
+interface MSWebViewAsyncOperationEventMap {
+    "complete": Event;
+    "error": Event;
+}
+
+interface MSWebViewAsyncOperation extends EventTarget {
+    readonly error: DOMError;
+    oncomplete: (this: MSWebViewAsyncOperation, ev: Event) => any;
+    onerror: (this: MSWebViewAsyncOperation, ev: Event) => any;
+    readonly readyState: number;
+    readonly result: any;
+    readonly target: MSHTMLWebViewElement;
+    readonly type: number;
+    start(): void;
+    readonly COMPLETED: number;
+    readonly ERROR: number;
+    readonly STARTED: number;
+    readonly TYPE_CAPTURE_PREVIEW_TO_RANDOM_ACCESS_STREAM: number;
+    readonly TYPE_CREATE_DATA_PACKAGE_FROM_SELECTION: number;
+    readonly TYPE_INVOKE_SCRIPT: number;
+    addEventListener<K extends keyof MSWebViewAsyncOperationEventMap>(type: K, listener: (this: MSWebViewAsyncOperation, ev: MSWebViewAsyncOperationEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MSWebViewAsyncOperation: {
+    prototype: MSWebViewAsyncOperation;
+    new(): MSWebViewAsyncOperation;
+    readonly COMPLETED: number;
+    readonly ERROR: number;
+    readonly STARTED: number;
+    readonly TYPE_CAPTURE_PREVIEW_TO_RANDOM_ACCESS_STREAM: number;
+    readonly TYPE_CREATE_DATA_PACKAGE_FROM_SELECTION: number;
+    readonly TYPE_INVOKE_SCRIPT: number;
+};
+
+interface MSWebViewSettings {
+    isIndexedDBEnabled: boolean;
+    isJavaScriptEnabled: boolean;
+}
+
+declare var MSWebViewSettings: {
+    prototype: MSWebViewSettings;
+    new(): MSWebViewSettings;
+};
+
+interface MutationEvent extends Event {
+    readonly attrChange: number;
+    readonly attrName: string;
+    readonly newValue: string;
+    readonly prevValue: string;
+    readonly relatedNode: Node;
+    initMutationEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, relatedNodeArg: Node, prevValueArg: string, newValueArg: string, attrNameArg: string, attrChangeArg: number): void;
+    readonly ADDITION: number;
+    readonly MODIFICATION: number;
+    readonly REMOVAL: number;
+}
+
+declare var MutationEvent: {
+    prototype: MutationEvent;
+    new(): MutationEvent;
+    readonly ADDITION: number;
+    readonly MODIFICATION: number;
+    readonly REMOVAL: number;
+};
+
+interface MutationObserver {
+    disconnect(): void;
+    observe(target: Node, options: MutationObserverInit): void;
+    takeRecords(): MutationRecord[];
+}
+
+declare var MutationObserver: {
+    prototype: MutationObserver;
+    new(callback: MutationCallback): MutationObserver;
+};
+
+interface MutationRecord {
+    readonly addedNodes: NodeList;
+    readonly attributeName: string | null;
+    readonly attributeNamespace: string | null;
+    readonly nextSibling: Node | null;
+    readonly oldValue: string | null;
+    readonly previousSibling: Node | null;
+    readonly removedNodes: NodeList;
+    readonly target: Node;
+    readonly type: string;
+}
+
+declare var MutationRecord: {
+    prototype: MutationRecord;
+    new(): MutationRecord;
+};
+
+interface NamedNodeMap {
+    readonly length: number;
+    getNamedItem(name: string): Attr;
+    getNamedItemNS(namespaceURI: string | null, localName: string | null): Attr;
+    item(index: number): Attr;
+    removeNamedItem(name: string): Attr;
+    removeNamedItemNS(namespaceURI: string | null, localName: string | null): Attr;
+    setNamedItem(arg: Attr): Attr;
+    setNamedItemNS(arg: Attr): Attr;
+    [index: number]: Attr;
+}
+
+declare var NamedNodeMap: {
+    prototype: NamedNodeMap;
+    new(): NamedNodeMap;
+};
+
+interface NavigationCompletedEvent extends NavigationEvent {
+    readonly isSuccess: boolean;
+    readonly webErrorStatus: number;
+}
+
+declare var NavigationCompletedEvent: {
+    prototype: NavigationCompletedEvent;
+    new(): NavigationCompletedEvent;
+};
+
+interface NavigationEvent extends Event {
+    readonly uri: string;
+}
+
+declare var NavigationEvent: {
+    prototype: NavigationEvent;
+    new(): NavigationEvent;
+};
+
+interface NavigationEventWithReferrer extends NavigationEvent {
+    readonly referer: string;
+}
+
+declare var NavigationEventWithReferrer: {
+    prototype: NavigationEventWithReferrer;
+    new(): NavigationEventWithReferrer;
+};
+
+interface Navigator extends Object, NavigatorID, NavigatorOnLine, NavigatorContentUtils, NavigatorStorageUtils, NavigatorGeolocation, MSNavigatorDoNotTrack, MSFileSaver, NavigatorBeacon, NavigatorConcurrentHardware, NavigatorUserMedia {
+    readonly authentication: WebAuthentication;
+    readonly cookieEnabled: boolean;
+    gamepadInputEmulation: GamepadInputEmulationType;
+    readonly language: string;
+    readonly maxTouchPoints: number;
+    readonly mimeTypes: MimeTypeArray;
+    readonly msManipulationViewsEnabled: boolean;
+    readonly msMaxTouchPoints: number;
+    readonly msPointerEnabled: boolean;
+    readonly plugins: PluginArray;
+    readonly pointerEnabled: boolean;
+    readonly serviceWorker: ServiceWorkerContainer;
+    readonly webdriver: boolean;
+    readonly hardwareConcurrency: number;
+    readonly languages: string[];
+    getGamepads(): Gamepad[];
+    javaEnabled(): boolean;
+    msLaunchUri(uri: string, successCallback?: MSLaunchUriCallback, noHandlerCallback?: MSLaunchUriCallback): void;
+    requestMediaKeySystemAccess(keySystem: string, supportedConfigurations: MediaKeySystemConfiguration[]): Promise<MediaKeySystemAccess>;
+    vibrate(pattern: number | number[]): boolean;
+}
+
+declare var Navigator: {
+    prototype: Navigator;
+    new(): Navigator;
+};
+
+interface Node extends EventTarget {
+    readonly attributes: NamedNodeMap;
+    readonly baseURI: string | null;
+    readonly childNodes: NodeList;
+    readonly firstChild: Node | null;
+    readonly lastChild: Node | null;
+    readonly localName: string | null;
+    readonly namespaceURI: string | null;
+    readonly nextSibling: Node | null;
+    readonly nodeName: string;
+    readonly nodeType: number;
+    nodeValue: string | null;
+    readonly ownerDocument: Document;
+    readonly parentElement: HTMLElement | null;
+    readonly parentNode: Node | null;
+    readonly previousSibling: Node | null;
+    textContent: string | null;
+    appendChild<T extends Node>(newChild: T): T;
+    cloneNode(deep?: boolean): Node;
+    compareDocumentPosition(other: Node): number;
+    contains(child: Node): boolean;
+    hasAttributes(): boolean;
+    hasChildNodes(): boolean;
+    insertBefore<T extends Node>(newChild: T, refChild: Node | null): T;
+    isDefaultNamespace(namespaceURI: string | null): boolean;
+    isEqualNode(arg: Node): boolean;
+    isSameNode(other: Node): boolean;
+    lookupNamespaceURI(prefix: string | null): string | null;
+    lookupPrefix(namespaceURI: string | null): string | null;
+    normalize(): void;
+    removeChild<T extends Node>(oldChild: T): T;
+    replaceChild<T extends Node>(newChild: Node, oldChild: T): T;
+    readonly ATTRIBUTE_NODE: number;
+    readonly CDATA_SECTION_NODE: number;
+    readonly COMMENT_NODE: number;
+    readonly DOCUMENT_FRAGMENT_NODE: number;
+    readonly DOCUMENT_NODE: number;
+    readonly DOCUMENT_POSITION_CONTAINED_BY: number;
+    readonly DOCUMENT_POSITION_CONTAINS: number;
+    readonly DOCUMENT_POSITION_DISCONNECTED: number;
+    readonly DOCUMENT_POSITION_FOLLOWING: number;
+    readonly DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC: number;
+    readonly DOCUMENT_POSITION_PRECEDING: number;
+    readonly DOCUMENT_TYPE_NODE: number;
+    readonly ELEMENT_NODE: number;
+    readonly ENTITY_NODE: number;
+    readonly ENTITY_REFERENCE_NODE: number;
+    readonly NOTATION_NODE: number;
+    readonly PROCESSING_INSTRUCTION_NODE: number;
+    readonly TEXT_NODE: number;
+}
+
+declare var Node: {
+    prototype: Node;
+    new(): Node;
+    readonly ATTRIBUTE_NODE: number;
+    readonly CDATA_SECTION_NODE: number;
+    readonly COMMENT_NODE: number;
+    readonly DOCUMENT_FRAGMENT_NODE: number;
+    readonly DOCUMENT_NODE: number;
+    readonly DOCUMENT_POSITION_CONTAINED_BY: number;
+    readonly DOCUMENT_POSITION_CONTAINS: number;
+    readonly DOCUMENT_POSITION_DISCONNECTED: number;
+    readonly DOCUMENT_POSITION_FOLLOWING: number;
+    readonly DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC: number;
+    readonly DOCUMENT_POSITION_PRECEDING: number;
+    readonly DOCUMENT_TYPE_NODE: number;
+    readonly ELEMENT_NODE: number;
+    readonly ENTITY_NODE: number;
+    readonly ENTITY_REFERENCE_NODE: number;
+    readonly NOTATION_NODE: number;
+    readonly PROCESSING_INSTRUCTION_NODE: number;
+    readonly TEXT_NODE: number;
+};
+
+interface NodeFilter {
+    acceptNode(n: Node): number;
+}
+
+declare var NodeFilter: {
+    readonly FILTER_ACCEPT: number;
+    readonly FILTER_REJECT: number;
+    readonly FILTER_SKIP: number;
+    readonly SHOW_ALL: number;
+    readonly SHOW_ATTRIBUTE: number;
+    readonly SHOW_CDATA_SECTION: number;
+    readonly SHOW_COMMENT: number;
+    readonly SHOW_DOCUMENT: number;
+    readonly SHOW_DOCUMENT_FRAGMENT: number;
+    readonly SHOW_DOCUMENT_TYPE: number;
+    readonly SHOW_ELEMENT: number;
+    readonly SHOW_ENTITY: number;
+    readonly SHOW_ENTITY_REFERENCE: number;
+    readonly SHOW_NOTATION: number;
+    readonly SHOW_PROCESSING_INSTRUCTION: number;
+    readonly SHOW_TEXT: number;
+};
+
+interface NodeIterator {
+    readonly expandEntityReferences: boolean;
+    readonly filter: NodeFilter;
+    readonly root: Node;
+    readonly whatToShow: number;
+    detach(): void;
+    nextNode(): Node;
+    previousNode(): Node;
+}
+
+declare var NodeIterator: {
+    prototype: NodeIterator;
+    new(): NodeIterator;
+};
+
+interface NodeList {
+    readonly length: number;
+    item(index: number): Node;
+    [index: number]: Node;
+}
+
+declare var NodeList: {
+    prototype: NodeList;
+    new(): NodeList;
+};
+
+interface NotificationEventMap {
+    "click": Event;
+    "close": Event;
+    "error": Event;
+    "show": Event;
+}
+
+interface Notification extends EventTarget {
+    readonly body: string;
+    readonly dir: NotificationDirection;
+    readonly icon: string;
+    readonly lang: string;
+    onclick: (this: Notification, ev: Event) => any;
+    onclose: (this: Notification, ev: Event) => any;
+    onerror: (this: Notification, ev: Event) => any;
+    onshow: (this: Notification, ev: Event) => any;
+    readonly permission: NotificationPermission;
+    readonly tag: string;
+    readonly title: string;
+    close(): void;
+    addEventListener<K extends keyof NotificationEventMap>(type: K, listener: (this: Notification, ev: NotificationEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var Notification: {
+    prototype: Notification;
+    new(title: string, options?: NotificationOptions): Notification;
+    requestPermission(callback?: NotificationPermissionCallback): Promise<NotificationPermission>;
+};
+
+interface OES_element_index_uint {
+}
+
+declare var OES_element_index_uint: {
+    prototype: OES_element_index_uint;
+    new(): OES_element_index_uint;
+};
+
+interface OES_standard_derivatives {
+    readonly FRAGMENT_SHADER_DERIVATIVE_HINT_OES: number;
+}
+
+declare var OES_standard_derivatives: {
+    prototype: OES_standard_derivatives;
+    new(): OES_standard_derivatives;
+    readonly FRAGMENT_SHADER_DERIVATIVE_HINT_OES: number;
+};
+
+interface OES_texture_float {
+}
+
+declare var OES_texture_float: {
+    prototype: OES_texture_float;
+    new(): OES_texture_float;
+};
+
+interface OES_texture_float_linear {
+}
+
+declare var OES_texture_float_linear: {
+    prototype: OES_texture_float_linear;
+    new(): OES_texture_float_linear;
+};
+
+interface OES_texture_half_float {
+    readonly HALF_FLOAT_OES: number;
+}
+
+declare var OES_texture_half_float: {
+    prototype: OES_texture_half_float;
+    new(): OES_texture_half_float;
+    readonly HALF_FLOAT_OES: number;
+};
+
+interface OES_texture_half_float_linear {
+}
+
+declare var OES_texture_half_float_linear: {
+    prototype: OES_texture_half_float_linear;
+    new(): OES_texture_half_float_linear;
+};
+
+interface OfflineAudioCompletionEvent extends Event {
+    readonly renderedBuffer: AudioBuffer;
+}
+
+declare var OfflineAudioCompletionEvent: {
+    prototype: OfflineAudioCompletionEvent;
+    new(): OfflineAudioCompletionEvent;
+};
+
+interface OfflineAudioContextEventMap extends AudioContextEventMap {
+    "complete": OfflineAudioCompletionEvent;
+}
+
+interface OfflineAudioContext extends AudioContextBase {
+    readonly length: number;
+    oncomplete: (this: OfflineAudioContext, ev: OfflineAudioCompletionEvent) => any;
+    startRendering(): Promise<AudioBuffer>;
+    suspend(suspendTime: number): Promise<void>;
+    addEventListener<K extends keyof OfflineAudioContextEventMap>(type: K, listener: (this: OfflineAudioContext, ev: OfflineAudioContextEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var OfflineAudioContext: {
+    prototype: OfflineAudioContext;
+    new(numberOfChannels: number, length: number, sampleRate: number): OfflineAudioContext;
+};
+
+interface OscillatorNodeEventMap {
+    "ended": MediaStreamErrorEvent;
+}
+
+interface OscillatorNode extends AudioNode {
+    readonly detune: AudioParam;
+    readonly frequency: AudioParam;
+    onended: (this: OscillatorNode, ev: MediaStreamErrorEvent) => any;
+    type: OscillatorType;
+    setPeriodicWave(periodicWave: PeriodicWave): void;
+    start(when?: number): void;
+    stop(when?: number): void;
+    addEventListener<K extends keyof OscillatorNodeEventMap>(type: K, listener: (this: OscillatorNode, ev: OscillatorNodeEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var OscillatorNode: {
+    prototype: OscillatorNode;
+    new(): OscillatorNode;
+};
+
+interface OverflowEvent extends UIEvent {
+    readonly horizontalOverflow: boolean;
+    readonly orient: number;
+    readonly verticalOverflow: boolean;
+    readonly BOTH: number;
+    readonly HORIZONTAL: number;
+    readonly VERTICAL: number;
+}
+
+declare var OverflowEvent: {
+    prototype: OverflowEvent;
+    new(): OverflowEvent;
+    readonly BOTH: number;
+    readonly HORIZONTAL: number;
+    readonly VERTICAL: number;
+};
+
+interface PageTransitionEvent extends Event {
+    readonly persisted: boolean;
+}
+
+declare var PageTransitionEvent: {
+    prototype: PageTransitionEvent;
+    new(): PageTransitionEvent;
+};
+
+interface PannerNode extends AudioNode {
+    coneInnerAngle: number;
+    coneOuterAngle: number;
+    coneOuterGain: number;
+    distanceModel: DistanceModelType;
+    maxDistance: number;
+    panningModel: PanningModelType;
+    refDistance: number;
+    rolloffFactor: number;
+    setOrientation(x: number, y: number, z: number): void;
+    setPosition(x: number, y: number, z: number): void;
+    setVelocity(x: number, y: number, z: number): void;
+}
+
+declare var PannerNode: {
+    prototype: PannerNode;
+    new(): PannerNode;
+};
+
+interface Path2D extends Object, CanvasPathMethods {
+}
+
+declare var Path2D: {
+    prototype: Path2D;
+    new(path?: Path2D): Path2D;
+};
+
+interface PaymentAddress {
+    readonly addressLine: string[];
+    readonly city: string;
+    readonly country: string;
+    readonly dependentLocality: string;
+    readonly languageCode: string;
+    readonly organization: string;
+    readonly phone: string;
+    readonly postalCode: string;
+    readonly recipient: string;
+    readonly region: string;
+    readonly sortingCode: string;
+    toJSON(): any;
+}
+
+declare var PaymentAddress: {
+    prototype: PaymentAddress;
+    new(): PaymentAddress;
+};
+
+interface PaymentRequestEventMap {
+    "shippingaddresschange": Event;
+    "shippingoptionchange": Event;
+}
+
+interface PaymentRequest extends EventTarget {
+    onshippingaddresschange: (this: PaymentRequest, ev: Event) => any;
+    onshippingoptionchange: (this: PaymentRequest, ev: Event) => any;
+    readonly shippingAddress: PaymentAddress | null;
+    readonly shippingOption: string | null;
+    readonly shippingType: PaymentShippingType | null;
+    abort(): Promise<void>;
+    show(): Promise<PaymentResponse>;
+    addEventListener<K extends keyof PaymentRequestEventMap>(type: K, listener: (this: PaymentRequest, ev: PaymentRequestEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var PaymentRequest: {
+    prototype: PaymentRequest;
+    new(methodData: PaymentMethodData[], details: PaymentDetails, options?: PaymentOptions): PaymentRequest;
+};
+
+interface PaymentRequestUpdateEvent extends Event {
+    updateWith(d: Promise<PaymentDetails>): void;
+}
+
+declare var PaymentRequestUpdateEvent: {
+    prototype: PaymentRequestUpdateEvent;
+    new(type: string, eventInitDict?: PaymentRequestUpdateEventInit): PaymentRequestUpdateEvent;
+};
+
+interface PaymentResponse {
+    readonly details: any;
+    readonly methodName: string;
+    readonly payerEmail: string | null;
+    readonly payerName: string | null;
+    readonly payerPhone: string | null;
+    readonly shippingAddress: PaymentAddress | null;
+    readonly shippingOption: string | null;
+    complete(result?: PaymentComplete): Promise<void>;
+    toJSON(): any;
+}
+
+declare var PaymentResponse: {
+    prototype: PaymentResponse;
+    new(): PaymentResponse;
+};
+
+interface Performance {
+    readonly navigation: PerformanceNavigation;
+    readonly timing: PerformanceTiming;
+    clearMarks(markName?: string): void;
+    clearMeasures(measureName?: string): void;
+    clearResourceTimings(): void;
+    getEntries(): any;
+    getEntriesByName(name: string, entryType?: string): any;
+    getEntriesByType(entryType: string): any;
+    getMarks(markName?: string): any;
+    getMeasures(measureName?: string): any;
+    mark(markName: string): void;
+    measure(measureName: string, startMarkName?: string, endMarkName?: string): void;
+    now(): number;
+    setResourceTimingBufferSize(maxSize: number): void;
+    toJSON(): any;
+}
+
+declare var Performance: {
+    prototype: Performance;
+    new(): Performance;
+};
+
+interface PerformanceEntry {
+    readonly duration: number;
+    readonly entryType: string;
+    readonly name: string;
+    readonly startTime: number;
+}
+
+declare var PerformanceEntry: {
+    prototype: PerformanceEntry;
+    new(): PerformanceEntry;
+};
+
+interface PerformanceMark extends PerformanceEntry {
+}
+
+declare var PerformanceMark: {
+    prototype: PerformanceMark;
+    new(): PerformanceMark;
+};
+
+interface PerformanceMeasure extends PerformanceEntry {
+}
+
+declare var PerformanceMeasure: {
+    prototype: PerformanceMeasure;
+    new(): PerformanceMeasure;
+};
+
+interface PerformanceNavigation {
+    readonly redirectCount: number;
+    readonly type: number;
+    toJSON(): any;
+    readonly TYPE_BACK_FORWARD: number;
+    readonly TYPE_NAVIGATE: number;
+    readonly TYPE_RELOAD: number;
+    readonly TYPE_RESERVED: number;
+}
+
+declare var PerformanceNavigation: {
+    prototype: PerformanceNavigation;
+    new(): PerformanceNavigation;
+    readonly TYPE_BACK_FORWARD: number;
+    readonly TYPE_NAVIGATE: number;
+    readonly TYPE_RELOAD: number;
+    readonly TYPE_RESERVED: number;
+};
+
+interface PerformanceNavigationTiming extends PerformanceEntry {
+    readonly connectEnd: number;
+    readonly connectStart: number;
+    readonly domainLookupEnd: number;
+    readonly domainLookupStart: number;
+    readonly domComplete: number;
+    readonly domContentLoadedEventEnd: number;
+    readonly domContentLoadedEventStart: number;
+    readonly domInteractive: number;
+    readonly domLoading: number;
+    readonly fetchStart: number;
+    readonly loadEventEnd: number;
+    readonly loadEventStart: number;
+    readonly navigationStart: number;
+    readonly redirectCount: number;
+    readonly redirectEnd: number;
+    readonly redirectStart: number;
+    readonly requestStart: number;
+    readonly responseEnd: number;
+    readonly responseStart: number;
+    readonly type: NavigationType;
+    readonly unloadEventEnd: number;
+    readonly unloadEventStart: number;
+}
+
+declare var PerformanceNavigationTiming: {
+    prototype: PerformanceNavigationTiming;
+    new(): PerformanceNavigationTiming;
+};
+
+interface PerformanceResourceTiming extends PerformanceEntry {
+    readonly connectEnd: number;
+    readonly connectStart: number;
+    readonly domainLookupEnd: number;
+    readonly domainLookupStart: number;
+    readonly fetchStart: number;
+    readonly initiatorType: string;
+    readonly redirectEnd: number;
+    readonly redirectStart: number;
+    readonly requestStart: number;
+    readonly responseEnd: number;
+    readonly responseStart: number;
+}
+
+declare var PerformanceResourceTiming: {
+    prototype: PerformanceResourceTiming;
+    new(): PerformanceResourceTiming;
+};
+
+interface PerformanceTiming {
+    readonly connectEnd: number;
+    readonly connectStart: number;
+    readonly domainLookupEnd: number;
+    readonly domainLookupStart: number;
+    readonly domComplete: number;
+    readonly domContentLoadedEventEnd: number;
+    readonly domContentLoadedEventStart: number;
+    readonly domInteractive: number;
+    readonly domLoading: number;
+    readonly fetchStart: number;
+    readonly loadEventEnd: number;
+    readonly loadEventStart: number;
+    readonly msFirstPaint: number;
+    readonly navigationStart: number;
+    readonly redirectEnd: number;
+    readonly redirectStart: number;
+    readonly requestStart: number;
+    readonly responseEnd: number;
+    readonly responseStart: number;
+    readonly unloadEventEnd: number;
+    readonly unloadEventStart: number;
+    readonly secureConnectionStart: number;
+    toJSON(): any;
+}
+
+declare var PerformanceTiming: {
+    prototype: PerformanceTiming;
+    new(): PerformanceTiming;
+};
+
+interface PerfWidgetExternal {
+    readonly activeNetworkRequestCount: number;
+    readonly averageFrameTime: number;
+    readonly averagePaintTime: number;
+    readonly extraInformationEnabled: boolean;
+    readonly independentRenderingEnabled: boolean;
+    readonly irDisablingContentString: string;
+    readonly irStatusAvailable: boolean;
+    readonly maxCpuSpeed: number;
+    readonly paintRequestsPerSecond: number;
+    readonly performanceCounter: number;
+    readonly performanceCounterFrequency: number;
+    addEventListener(eventType: string, callback: Function): void;
+    getMemoryUsage(): number;
+    getProcessCpuUsage(): number;
+    getRecentCpuUsage(last: number | null): any;
+    getRecentFrames(last: number | null): any;
+    getRecentMemoryUsage(last: number | null): any;
+    getRecentPaintRequests(last: number | null): any;
+    removeEventListener(eventType: string, callback: Function): void;
+    repositionWindow(x: number, y: number): void;
+    resizeWindow(width: number, height: number): void;
+}
+
+declare var PerfWidgetExternal: {
+    prototype: PerfWidgetExternal;
+    new(): PerfWidgetExternal;
+};
+
+interface PeriodicWave {
+}
+
+declare var PeriodicWave: {
+    prototype: PeriodicWave;
+    new(): PeriodicWave;
+};
+
+interface PermissionRequest extends DeferredPermissionRequest {
+    readonly state: MSWebViewPermissionState;
+    defer(): void;
+}
+
+declare var PermissionRequest: {
+    prototype: PermissionRequest;
+    new(): PermissionRequest;
+};
+
+interface PermissionRequestedEvent extends Event {
+    readonly permissionRequest: PermissionRequest;
+}
+
+declare var PermissionRequestedEvent: {
+    prototype: PermissionRequestedEvent;
+    new(): PermissionRequestedEvent;
+};
+
+interface Plugin {
+    readonly description: string;
+    readonly filename: string;
+    readonly length: number;
+    readonly name: string;
+    readonly version: string;
+    item(index: number): MimeType;
+    namedItem(type: string): MimeType;
+    [index: number]: MimeType;
+}
+
+declare var Plugin: {
+    prototype: Plugin;
+    new(): Plugin;
+};
+
+interface PluginArray {
+    readonly length: number;
+    item(index: number): Plugin;
+    namedItem(name: string): Plugin;
+    refresh(reload?: boolean): void;
+    [index: number]: Plugin;
+}
+
+declare var PluginArray: {
+    prototype: PluginArray;
+    new(): PluginArray;
+};
+
+interface PointerEvent extends MouseEvent {
+    readonly currentPoint: any;
+    readonly height: number;
+    readonly hwTimestamp: number;
+    readonly intermediatePoints: any;
+    readonly isPrimary: boolean;
+    readonly pointerId: number;
+    readonly pointerType: any;
+    readonly pressure: number;
+    readonly rotation: number;
+    readonly tiltX: number;
+    readonly tiltY: number;
+    readonly width: number;
+    getCurrentPoint(element: Element): void;
+    getIntermediatePoints(element: Element): void;
+    initPointerEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, ctrlKeyArg: boolean, altKeyArg: boolean, shiftKeyArg: boolean, metaKeyArg: boolean, buttonArg: number, relatedTargetArg: EventTarget, offsetXArg: number, offsetYArg: number, widthArg: number, heightArg: number, pressure: number, rotation: number, tiltX: number, tiltY: number, pointerIdArg: number, pointerType: any, hwTimestampArg: number, isPrimary: boolean): void;
+}
+
+declare var PointerEvent: {
+    prototype: PointerEvent;
+    new(typeArg: string, eventInitDict?: PointerEventInit): PointerEvent;
+};
+
+interface PopStateEvent extends Event {
+    readonly state: any;
+    initPopStateEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, stateArg: any): void;
+}
+
+declare var PopStateEvent: {
+    prototype: PopStateEvent;
+    new(typeArg: string, eventInitDict?: PopStateEventInit): PopStateEvent;
+};
+
+interface Position {
+    readonly coords: Coordinates;
+    readonly timestamp: number;
+}
+
+declare var Position: {
+    prototype: Position;
+    new(): Position;
+};
+
+interface PositionError {
+    readonly code: number;
+    readonly message: string;
+    toString(): string;
+    readonly PERMISSION_DENIED: number;
+    readonly POSITION_UNAVAILABLE: number;
+    readonly TIMEOUT: number;
+}
+
+declare var PositionError: {
+    prototype: PositionError;
+    new(): PositionError;
+    readonly PERMISSION_DENIED: number;
+    readonly POSITION_UNAVAILABLE: number;
+    readonly TIMEOUT: number;
+};
+
+interface ProcessingInstruction extends CharacterData {
+    readonly target: string;
+}
+
+declare var ProcessingInstruction: {
+    prototype: ProcessingInstruction;
+    new(): ProcessingInstruction;
+};
+
+interface ProgressEvent extends Event {
+    readonly lengthComputable: boolean;
+    readonly loaded: number;
+    readonly total: number;
+    initProgressEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, lengthComputableArg: boolean, loadedArg: number, totalArg: number): void;
+}
+
+declare var ProgressEvent: {
+    prototype: ProgressEvent;
+    new(type: string, eventInitDict?: ProgressEventInit): ProgressEvent;
+};
+
+interface PushManager {
+    getSubscription(): Promise<PushSubscription>;
+    permissionState(options?: PushSubscriptionOptionsInit): Promise<PushPermissionState>;
+    subscribe(options?: PushSubscriptionOptionsInit): Promise<PushSubscription>;
+}
+
+declare var PushManager: {
+    prototype: PushManager;
+    new(): PushManager;
+};
+
+interface PushSubscription {
+    readonly endpoint: USVString;
+    readonly options: PushSubscriptionOptions;
+    getKey(name: PushEncryptionKeyName): ArrayBuffer | null;
+    toJSON(): any;
+    unsubscribe(): Promise<boolean>;
+}
+
+declare var PushSubscription: {
+    prototype: PushSubscription;
+    new(): PushSubscription;
+};
+
+interface PushSubscriptionOptions {
+    readonly applicationServerKey: ArrayBuffer | null;
+    readonly userVisibleOnly: boolean;
+}
+
+declare var PushSubscriptionOptions: {
+    prototype: PushSubscriptionOptions;
+    new(): PushSubscriptionOptions;
+};
+
+interface Range {
+    readonly collapsed: boolean;
+    readonly commonAncestorContainer: Node;
+    readonly endContainer: Node;
+    readonly endOffset: number;
+    readonly startContainer: Node;
+    readonly startOffset: number;
+    cloneContents(): DocumentFragment;
+    cloneRange(): Range;
+    collapse(toStart: boolean): void;
+    compareBoundaryPoints(how: number, sourceRange: Range): number;
+    createContextualFragment(fragment: string): DocumentFragment;
+    deleteContents(): void;
+    detach(): void;
+    expand(Unit: ExpandGranularity): boolean;
+    extractContents(): DocumentFragment;
+    getBoundingClientRect(): ClientRect;
+    getClientRects(): ClientRectList;
+    insertNode(newNode: Node): void;
+    selectNode(refNode: Node): void;
+    selectNodeContents(refNode: Node): void;
+    setEnd(refNode: Node, offset: number): void;
+    setEndAfter(refNode: Node): void;
+    setEndBefore(refNode: Node): void;
+    setStart(refNode: Node, offset: number): void;
+    setStartAfter(refNode: Node): void;
+    setStartBefore(refNode: Node): void;
+    surroundContents(newParent: Node): void;
+    toString(): string;
+    readonly END_TO_END: number;
+    readonly END_TO_START: number;
+    readonly START_TO_END: number;
+    readonly START_TO_START: number;
+}
+
+declare var Range: {
+    prototype: Range;
+    new(): Range;
+    readonly END_TO_END: number;
+    readonly END_TO_START: number;
+    readonly START_TO_END: number;
+    readonly START_TO_START: number;
+};
+
+interface ReadableStream {
+    readonly locked: boolean;
+    cancel(): Promise<void>;
+    getReader(): ReadableStreamReader;
+}
+
+declare var ReadableStream: {
+    prototype: ReadableStream;
+    new(): ReadableStream;
+};
+
+interface ReadableStreamReader {
+    cancel(): Promise<void>;
+    read(): Promise<any>;
+    releaseLock(): void;
+}
+
+declare var ReadableStreamReader: {
+    prototype: ReadableStreamReader;
+    new(): ReadableStreamReader;
+};
+
+interface Request extends Object, Body {
+    readonly cache: RequestCache;
+    readonly credentials: RequestCredentials;
+    readonly destination: RequestDestination;
+    readonly headers: Headers;
+    readonly integrity: string;
+    readonly keepalive: boolean;
+    readonly method: string;
+    readonly mode: RequestMode;
+    readonly redirect: RequestRedirect;
+    readonly referrer: string;
+    readonly referrerPolicy: ReferrerPolicy;
+    readonly type: RequestType;
+    readonly url: string;
+    clone(): Request;
+}
+
+declare var Request: {
+    prototype: Request;
+    new(input: Request | string, init?: RequestInit): Request;
+};
+
+interface Response extends Object, Body {
+    readonly body: ReadableStream | null;
+    readonly headers: Headers;
+    readonly ok: boolean;
+    readonly status: number;
+    readonly statusText: string;
+    readonly type: ResponseType;
+    readonly url: string;
+    clone(): Response;
+}
+
+declare var Response: {
+    prototype: Response;
+    new(body?: any, init?: ResponseInit): Response;
+    error: () => Response;
+    redirect: (url: string, status?: number) => Response;
+};
+
+interface RTCDtlsTransportEventMap {
+    "dtlsstatechange": RTCDtlsTransportStateChangedEvent;
+    "error": Event;
+}
+
+interface RTCDtlsTransport extends RTCStatsProvider {
+    ondtlsstatechange: ((this: RTCDtlsTransport, ev: RTCDtlsTransportStateChangedEvent) => any) | null;
+    onerror: ((this: RTCDtlsTransport, ev: Event) => any) | null;
+    readonly state: RTCDtlsTransportState;
+    readonly transport: RTCIceTransport;
+    getLocalParameters(): RTCDtlsParameters;
+    getRemoteCertificates(): ArrayBuffer[];
+    getRemoteParameters(): RTCDtlsParameters | null;
+    start(remoteParameters: RTCDtlsParameters): void;
+    stop(): void;
+    addEventListener<K extends keyof RTCDtlsTransportEventMap>(type: K, listener: (this: RTCDtlsTransport, ev: RTCDtlsTransportEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var RTCDtlsTransport: {
+    prototype: RTCDtlsTransport;
+    new(transport: RTCIceTransport): RTCDtlsTransport;
+};
+
+interface RTCDtlsTransportStateChangedEvent extends Event {
+    readonly state: RTCDtlsTransportState;
+}
+
+declare var RTCDtlsTransportStateChangedEvent: {
+    prototype: RTCDtlsTransportStateChangedEvent;
+    new(): RTCDtlsTransportStateChangedEvent;
+};
+
+interface RTCDtmfSenderEventMap {
+    "tonechange": RTCDTMFToneChangeEvent;
+}
+
+interface RTCDtmfSender extends EventTarget {
+    readonly canInsertDTMF: boolean;
+    readonly duration: number;
+    readonly interToneGap: number;
+    ontonechange: (this: RTCDtmfSender, ev: RTCDTMFToneChangeEvent) => any;
+    readonly sender: RTCRtpSender;
+    readonly toneBuffer: string;
+    insertDTMF(tones: string, duration?: number, interToneGap?: number): void;
+    addEventListener<K extends keyof RTCDtmfSenderEventMap>(type: K, listener: (this: RTCDtmfSender, ev: RTCDtmfSenderEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var RTCDtmfSender: {
+    prototype: RTCDtmfSender;
+    new(sender: RTCRtpSender): RTCDtmfSender;
+};
+
+interface RTCDTMFToneChangeEvent extends Event {
+    readonly tone: string;
+}
+
+declare var RTCDTMFToneChangeEvent: {
+    prototype: RTCDTMFToneChangeEvent;
+    new(typeArg: string, eventInitDict: RTCDTMFToneChangeEventInit): RTCDTMFToneChangeEvent;
+};
+
+interface RTCIceCandidate {
+    candidate: string | null;
+    sdpMid: string | null;
+    sdpMLineIndex: number | null;
+    toJSON(): any;
+}
+
+declare var RTCIceCandidate: {
+    prototype: RTCIceCandidate;
+    new(candidateInitDict?: RTCIceCandidateInit): RTCIceCandidate;
+};
+
+interface RTCIceCandidatePairChangedEvent extends Event {
+    readonly pair: RTCIceCandidatePair;
+}
+
+declare var RTCIceCandidatePairChangedEvent: {
+    prototype: RTCIceCandidatePairChangedEvent;
+    new(): RTCIceCandidatePairChangedEvent;
+};
+
+interface RTCIceGathererEventMap {
+    "error": Event;
+    "localcandidate": RTCIceGathererEvent;
+}
+
+interface RTCIceGatherer extends RTCStatsProvider {
+    readonly component: RTCIceComponent;
+    onerror: ((this: RTCIceGatherer, ev: Event) => any) | null;
+    onlocalcandidate: ((this: RTCIceGatherer, ev: RTCIceGathererEvent) => any) | null;
+    createAssociatedGatherer(): RTCIceGatherer;
+    getLocalCandidates(): RTCIceCandidateDictionary[];
+    getLocalParameters(): RTCIceParameters;
+    addEventListener<K extends keyof RTCIceGathererEventMap>(type: K, listener: (this: RTCIceGatherer, ev: RTCIceGathererEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var RTCIceGatherer: {
+    prototype: RTCIceGatherer;
+    new(options: RTCIceGatherOptions): RTCIceGatherer;
+};
+
+interface RTCIceGathererEvent extends Event {
+    readonly candidate: RTCIceCandidateDictionary | RTCIceCandidateComplete;
+}
+
+declare var RTCIceGathererEvent: {
+    prototype: RTCIceGathererEvent;
+    new(): RTCIceGathererEvent;
+};
+
+interface RTCIceTransportEventMap {
+    "candidatepairchange": RTCIceCandidatePairChangedEvent;
+    "icestatechange": RTCIceTransportStateChangedEvent;
+}
+
+interface RTCIceTransport extends RTCStatsProvider {
+    readonly component: RTCIceComponent;
+    readonly iceGatherer: RTCIceGatherer | null;
+    oncandidatepairchange: ((this: RTCIceTransport, ev: RTCIceCandidatePairChangedEvent) => any) | null;
+    onicestatechange: ((this: RTCIceTransport, ev: RTCIceTransportStateChangedEvent) => any) | null;
+    readonly role: RTCIceRole;
+    readonly state: RTCIceTransportState;
+    addRemoteCandidate(remoteCandidate: RTCIceCandidateDictionary | RTCIceCandidateComplete): void;
+    createAssociatedTransport(): RTCIceTransport;
+    getNominatedCandidatePair(): RTCIceCandidatePair | null;
+    getRemoteCandidates(): RTCIceCandidateDictionary[];
+    getRemoteParameters(): RTCIceParameters | null;
+    setRemoteCandidates(remoteCandidates: RTCIceCandidateDictionary[]): void;
+    start(gatherer: RTCIceGatherer, remoteParameters: RTCIceParameters, role?: RTCIceRole): void;
+    stop(): void;
+    addEventListener<K extends keyof RTCIceTransportEventMap>(type: K, listener: (this: RTCIceTransport, ev: RTCIceTransportEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var RTCIceTransport: {
+    prototype: RTCIceTransport;
+    new(): RTCIceTransport;
+};
+
+interface RTCIceTransportStateChangedEvent extends Event {
+    readonly state: RTCIceTransportState;
+}
+
+declare var RTCIceTransportStateChangedEvent: {
+    prototype: RTCIceTransportStateChangedEvent;
+    new(): RTCIceTransportStateChangedEvent;
+};
+
+interface RTCPeerConnectionEventMap {
+    "addstream": MediaStreamEvent;
+    "icecandidate": RTCPeerConnectionIceEvent;
+    "iceconnectionstatechange": Event;
+    "icegatheringstatechange": Event;
+    "negotiationneeded": Event;
+    "removestream": MediaStreamEvent;
+    "signalingstatechange": Event;
+}
+
+interface RTCPeerConnection extends EventTarget {
+    readonly canTrickleIceCandidates: boolean | null;
+    readonly iceConnectionState: RTCIceConnectionState;
+    readonly iceGatheringState: RTCIceGatheringState;
+    readonly localDescription: RTCSessionDescription | null;
+    onaddstream: (this: RTCPeerConnection, ev: MediaStreamEvent) => any;
+    onicecandidate: (this: RTCPeerConnection, ev: RTCPeerConnectionIceEvent) => any;
+    oniceconnectionstatechange: (this: RTCPeerConnection, ev: Event) => any;
+    onicegatheringstatechange: (this: RTCPeerConnection, ev: Event) => any;
+    onnegotiationneeded: (this: RTCPeerConnection, ev: Event) => any;
+    onremovestream: (this: RTCPeerConnection, ev: MediaStreamEvent) => any;
+    onsignalingstatechange: (this: RTCPeerConnection, ev: Event) => any;
+    readonly remoteDescription: RTCSessionDescription | null;
+    readonly signalingState: RTCSignalingState;
+    addIceCandidate(candidate: RTCIceCandidate, successCallback?: VoidFunction, failureCallback?: RTCPeerConnectionErrorCallback): Promise<void>;
+    addStream(stream: MediaStream): void;
+    close(): void;
+    createAnswer(successCallback?: RTCSessionDescriptionCallback, failureCallback?: RTCPeerConnectionErrorCallback): Promise<RTCSessionDescription>;
+    createOffer(successCallback?: RTCSessionDescriptionCallback, failureCallback?: RTCPeerConnectionErrorCallback, options?: RTCOfferOptions): Promise<RTCSessionDescription>;
+    getConfiguration(): RTCConfiguration;
+    getLocalStreams(): MediaStream[];
+    getRemoteStreams(): MediaStream[];
+    getStats(selector: MediaStreamTrack | null, successCallback?: RTCStatsCallback, failureCallback?: RTCPeerConnectionErrorCallback): Promise<RTCStatsReport>;
+    getStreamById(streamId: string): MediaStream | null;
+    removeStream(stream: MediaStream): void;
+    setLocalDescription(description: RTCSessionDescription, successCallback?: VoidFunction, failureCallback?: RTCPeerConnectionErrorCallback): Promise<void>;
+    setRemoteDescription(description: RTCSessionDescription, successCallback?: VoidFunction, failureCallback?: RTCPeerConnectionErrorCallback): Promise<void>;
+    addEventListener<K extends keyof RTCPeerConnectionEventMap>(type: K, listener: (this: RTCPeerConnection, ev: RTCPeerConnectionEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var RTCPeerConnection: {
+    prototype: RTCPeerConnection;
+    new(configuration: RTCConfiguration): RTCPeerConnection;
+};
+
+interface RTCPeerConnectionIceEvent extends Event {
+    readonly candidate: RTCIceCandidate;
+}
+
+declare var RTCPeerConnectionIceEvent: {
+    prototype: RTCPeerConnectionIceEvent;
+    new(type: string, eventInitDict: RTCPeerConnectionIceEventInit): RTCPeerConnectionIceEvent;
+};
+
+interface RTCRtpReceiverEventMap {
+    "error": Event;
+}
+
+interface RTCRtpReceiver extends RTCStatsProvider {
+    onerror: ((this: RTCRtpReceiver, ev: Event) => any) | null;
+    readonly rtcpTransport: RTCDtlsTransport;
+    readonly track: MediaStreamTrack | null;
+    readonly transport: RTCDtlsTransport | RTCSrtpSdesTransport;
+    getContributingSources(): RTCRtpContributingSource[];
+    receive(parameters: RTCRtpParameters): void;
+    requestSendCSRC(csrc: number): void;
+    setTransport(transport: RTCDtlsTransport | RTCSrtpSdesTransport, rtcpTransport?: RTCDtlsTransport): void;
+    stop(): void;
+    addEventListener<K extends keyof RTCRtpReceiverEventMap>(type: K, listener: (this: RTCRtpReceiver, ev: RTCRtpReceiverEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var RTCRtpReceiver: {
+    prototype: RTCRtpReceiver;
+    new(transport: RTCDtlsTransport | RTCSrtpSdesTransport, kind: string, rtcpTransport?: RTCDtlsTransport): RTCRtpReceiver;
+    getCapabilities(kind?: string): RTCRtpCapabilities;
+};
+
+interface RTCRtpSenderEventMap {
+    "error": Event;
+    "ssrcconflict": RTCSsrcConflictEvent;
+}
+
+interface RTCRtpSender extends RTCStatsProvider {
+    onerror: ((this: RTCRtpSender, ev: Event) => any) | null;
+    onssrcconflict: ((this: RTCRtpSender, ev: RTCSsrcConflictEvent) => any) | null;
+    readonly rtcpTransport: RTCDtlsTransport;
+    readonly track: MediaStreamTrack;
+    readonly transport: RTCDtlsTransport | RTCSrtpSdesTransport;
+    send(parameters: RTCRtpParameters): void;
+    setTrack(track: MediaStreamTrack): void;
+    setTransport(transport: RTCDtlsTransport | RTCSrtpSdesTransport, rtcpTransport?: RTCDtlsTransport): void;
+    stop(): void;
+    addEventListener<K extends keyof RTCRtpSenderEventMap>(type: K, listener: (this: RTCRtpSender, ev: RTCRtpSenderEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var RTCRtpSender: {
+    prototype: RTCRtpSender;
+    new(track: MediaStreamTrack, transport: RTCDtlsTransport | RTCSrtpSdesTransport, rtcpTransport?: RTCDtlsTransport): RTCRtpSender;
+    getCapabilities(kind?: string): RTCRtpCapabilities;
+};
+
+interface RTCSessionDescription {
+    sdp: string | null;
+    type: RTCSdpType | null;
+    toJSON(): any;
+}
+
+declare var RTCSessionDescription: {
+    prototype: RTCSessionDescription;
+    new(descriptionInitDict?: RTCSessionDescriptionInit): RTCSessionDescription;
+};
+
+interface RTCSrtpSdesTransportEventMap {
+    "error": Event;
+}
+
+interface RTCSrtpSdesTransport extends EventTarget {
+    onerror: ((this: RTCSrtpSdesTransport, ev: Event) => any) | null;
+    readonly transport: RTCIceTransport;
+    addEventListener<K extends keyof RTCSrtpSdesTransportEventMap>(type: K, listener: (this: RTCSrtpSdesTransport, ev: RTCSrtpSdesTransportEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var RTCSrtpSdesTransport: {
+    prototype: RTCSrtpSdesTransport;
+    new(transport: RTCIceTransport, encryptParameters: RTCSrtpSdesParameters, decryptParameters: RTCSrtpSdesParameters): RTCSrtpSdesTransport;
+    getLocalParameters(): RTCSrtpSdesParameters[];
+};
+
+interface RTCSsrcConflictEvent extends Event {
+    readonly ssrc: number;
+}
+
+declare var RTCSsrcConflictEvent: {
+    prototype: RTCSsrcConflictEvent;
+    new(): RTCSsrcConflictEvent;
+};
+
+interface RTCStatsProvider extends EventTarget {
+    getStats(): Promise<RTCStatsReport>;
+    msGetStats(): Promise<RTCStatsReport>;
+}
+
+declare var RTCStatsProvider: {
+    prototype: RTCStatsProvider;
+    new(): RTCStatsProvider;
+};
+
+interface ScopedCredential {
+    readonly id: ArrayBuffer;
+    readonly type: ScopedCredentialType;
+}
+
+declare var ScopedCredential: {
+    prototype: ScopedCredential;
+    new(): ScopedCredential;
+};
+
+interface ScopedCredentialInfo {
+    readonly credential: ScopedCredential;
+    readonly publicKey: CryptoKey;
+}
+
+declare var ScopedCredentialInfo: {
+    prototype: ScopedCredentialInfo;
+    new(): ScopedCredentialInfo;
+};
+
+interface ScreenEventMap {
+    "MSOrientationChange": Event;
+}
+
+interface Screen extends EventTarget {
+    readonly availHeight: number;
+    readonly availWidth: number;
+    bufferDepth: number;
+    readonly colorDepth: number;
+    readonly deviceXDPI: number;
+    readonly deviceYDPI: number;
+    readonly fontSmoothingEnabled: boolean;
+    readonly height: number;
+    readonly logicalXDPI: number;
+    readonly logicalYDPI: number;
+    readonly msOrientation: string;
+    onmsorientationchange: (this: Screen, ev: Event) => any;
+    readonly pixelDepth: number;
+    readonly systemXDPI: number;
+    readonly systemYDPI: number;
+    readonly width: number;
+    msLockOrientation(orientations: string | string[]): boolean;
+    msUnlockOrientation(): void;
+    addEventListener<K extends keyof ScreenEventMap>(type: K, listener: (this: Screen, ev: ScreenEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var Screen: {
+    prototype: Screen;
+    new(): Screen;
+};
+
+interface ScriptNotifyEvent extends Event {
+    readonly callingUri: string;
+    readonly value: string;
+}
+
+declare var ScriptNotifyEvent: {
+    prototype: ScriptNotifyEvent;
+    new(): ScriptNotifyEvent;
+};
+
+interface ScriptProcessorNodeEventMap {
+    "audioprocess": AudioProcessingEvent;
+}
+
+interface ScriptProcessorNode extends AudioNode {
+    readonly bufferSize: number;
+    onaudioprocess: (this: ScriptProcessorNode, ev: AudioProcessingEvent) => any;
+    addEventListener<K extends keyof ScriptProcessorNodeEventMap>(type: K, listener: (this: ScriptProcessorNode, ev: ScriptProcessorNodeEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var ScriptProcessorNode: {
+    prototype: ScriptProcessorNode;
+    new(): ScriptProcessorNode;
+};
+
+interface Selection {
+    readonly anchorNode: Node;
+    readonly anchorOffset: number;
+    readonly baseNode: Node;
+    readonly baseOffset: number;
+    readonly extentNode: Node;
+    readonly extentOffset: number;
+    readonly focusNode: Node;
+    readonly focusOffset: number;
+    readonly isCollapsed: boolean;
+    readonly rangeCount: number;
+    readonly type: string;
+    addRange(range: Range): void;
+    collapse(parentNode: Node, offset: number): void;
+    collapseToEnd(): void;
+    collapseToStart(): void;
+    containsNode(node: Node, partlyContained: boolean): boolean;
+    deleteFromDocument(): void;
+    empty(): void;
+    extend(newNode: Node, offset: number): void;
+    getRangeAt(index: number): Range;
+    removeAllRanges(): void;
+    removeRange(range: Range): void;
+    selectAllChildren(parentNode: Node): void;
+    setBaseAndExtent(baseNode: Node, baseOffset: number, extentNode: Node, extentOffset: number): void;
+    setPosition(parentNode: Node, offset: number): void;
+    toString(): string;
+}
+
+declare var Selection: {
+    prototype: Selection;
+    new(): Selection;
+};
+
+interface ServiceWorkerEventMap extends AbstractWorkerEventMap {
+    "statechange": Event;
+}
+
+interface ServiceWorker extends EventTarget, AbstractWorker {
+    onstatechange: (this: ServiceWorker, ev: Event) => any;
+    readonly scriptURL: USVString;
+    readonly state: ServiceWorkerState;
+    postMessage(message: any, transfer?: any[]): void;
+    addEventListener<K extends keyof ServiceWorkerEventMap>(type: K, listener: (this: ServiceWorker, ev: ServiceWorkerEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var ServiceWorker: {
+    prototype: ServiceWorker;
+    new(): ServiceWorker;
+};
+
+interface ServiceWorkerContainerEventMap {
+    "controllerchange": Event;
+    "message": ServiceWorkerMessageEvent;
+}
+
+interface ServiceWorkerContainer extends EventTarget {
+    readonly controller: ServiceWorker | null;
+    oncontrollerchange: (this: ServiceWorkerContainer, ev: Event) => any;
+    onmessage: (this: ServiceWorkerContainer, ev: ServiceWorkerMessageEvent) => any;
+    readonly ready: Promise<ServiceWorkerRegistration>;
+    getRegistration(clientURL?: USVString): Promise<any>;
+    getRegistrations(): any;
+    register(scriptURL: USVString, options?: RegistrationOptions): Promise<ServiceWorkerRegistration>;
+    addEventListener<K extends keyof ServiceWorkerContainerEventMap>(type: K, listener: (this: ServiceWorkerContainer, ev: ServiceWorkerContainerEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var ServiceWorkerContainer: {
+    prototype: ServiceWorkerContainer;
+    new(): ServiceWorkerContainer;
+};
+
+interface ServiceWorkerMessageEvent extends Event {
+    readonly data: any;
+    readonly lastEventId: string;
+    readonly origin: string;
+    readonly ports: MessagePort[] | null;
+    readonly source: ServiceWorker | MessagePort | null;
+}
+
+declare var ServiceWorkerMessageEvent: {
+    prototype: ServiceWorkerMessageEvent;
+    new(type: string, eventInitDict?: ServiceWorkerMessageEventInit): ServiceWorkerMessageEvent;
+};
+
+interface ServiceWorkerRegistrationEventMap {
+    "updatefound": Event;
+}
+
+interface ServiceWorkerRegistration extends EventTarget {
+    readonly active: ServiceWorker | null;
+    readonly installing: ServiceWorker | null;
+    onupdatefound: (this: ServiceWorkerRegistration, ev: Event) => any;
+    readonly pushManager: PushManager;
+    readonly scope: USVString;
+    readonly sync: SyncManager;
+    readonly waiting: ServiceWorker | null;
+    getNotifications(filter?: GetNotificationOptions): any;
+    showNotification(title: string, options?: NotificationOptions): Promise<void>;
+    unregister(): Promise<boolean>;
+    update(): Promise<void>;
+    addEventListener<K extends keyof ServiceWorkerRegistrationEventMap>(type: K, listener: (this: ServiceWorkerRegistration, ev: ServiceWorkerRegistrationEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var ServiceWorkerRegistration: {
+    prototype: ServiceWorkerRegistration;
+    new(): ServiceWorkerRegistration;
+};
+
+interface SourceBuffer extends EventTarget {
+    appendWindowEnd: number;
+    appendWindowStart: number;
+    readonly audioTracks: AudioTrackList;
+    readonly buffered: TimeRanges;
+    mode: AppendMode;
+    timestampOffset: number;
+    readonly updating: boolean;
+    readonly videoTracks: VideoTrackList;
+    abort(): void;
+    appendBuffer(data: ArrayBuffer | ArrayBufferView): void;
+    appendStream(stream: MSStream, maxSize?: number): void;
+    remove(start: number, end: number): void;
+}
+
+declare var SourceBuffer: {
+    prototype: SourceBuffer;
+    new(): SourceBuffer;
+};
+
+interface SourceBufferList extends EventTarget {
+    readonly length: number;
+    item(index: number): SourceBuffer;
+    [index: number]: SourceBuffer;
+}
+
+declare var SourceBufferList: {
+    prototype: SourceBufferList;
+    new(): SourceBufferList;
+};
+
+interface SpeechSynthesisEventMap {
+    "voiceschanged": Event;
+}
+
+interface SpeechSynthesis extends EventTarget {
+    onvoiceschanged: (this: SpeechSynthesis, ev: Event) => any;
+    readonly paused: boolean;
+    readonly pending: boolean;
+    readonly speaking: boolean;
+    cancel(): void;
+    getVoices(): SpeechSynthesisVoice[];
+    pause(): void;
+    resume(): void;
+    speak(utterance: SpeechSynthesisUtterance): void;
+    addEventListener<K extends keyof SpeechSynthesisEventMap>(type: K, listener: (this: SpeechSynthesis, ev: SpeechSynthesisEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SpeechSynthesis: {
+    prototype: SpeechSynthesis;
+    new(): SpeechSynthesis;
+};
+
+interface SpeechSynthesisEvent extends Event {
+    readonly charIndex: number;
+    readonly elapsedTime: number;
+    readonly name: string;
+    readonly utterance: SpeechSynthesisUtterance | null;
+}
+
+declare var SpeechSynthesisEvent: {
+    prototype: SpeechSynthesisEvent;
+    new(type: string, eventInitDict?: SpeechSynthesisEventInit): SpeechSynthesisEvent;
+};
+
+interface SpeechSynthesisUtteranceEventMap {
+    "boundary": Event;
+    "end": Event;
+    "error": Event;
+    "mark": Event;
+    "pause": Event;
+    "resume": Event;
+    "start": Event;
+}
+
+interface SpeechSynthesisUtterance extends EventTarget {
+    lang: string;
+    onboundary: (this: SpeechSynthesisUtterance, ev: Event) => any;
+    onend: (this: SpeechSynthesisUtterance, ev: Event) => any;
+    onerror: (this: SpeechSynthesisUtterance, ev: Event) => any;
+    onmark: (this: SpeechSynthesisUtterance, ev: Event) => any;
+    onpause: (this: SpeechSynthesisUtterance, ev: Event) => any;
+    onresume: (this: SpeechSynthesisUtterance, ev: Event) => any;
+    onstart: (this: SpeechSynthesisUtterance, ev: Event) => any;
+    pitch: number;
+    rate: number;
+    text: string;
+    voice: SpeechSynthesisVoice;
+    volume: number;
+    addEventListener<K extends keyof SpeechSynthesisUtteranceEventMap>(type: K, listener: (this: SpeechSynthesisUtterance, ev: SpeechSynthesisUtteranceEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SpeechSynthesisUtterance: {
+    prototype: SpeechSynthesisUtterance;
+    new(text?: string): SpeechSynthesisUtterance;
+};
+
+interface SpeechSynthesisVoice {
+    readonly default: boolean;
+    readonly lang: string;
+    readonly localService: boolean;
+    readonly name: string;
+    readonly voiceURI: string;
+}
+
+declare var SpeechSynthesisVoice: {
+    prototype: SpeechSynthesisVoice;
+    new(): SpeechSynthesisVoice;
+};
+
+interface StereoPannerNode extends AudioNode {
+    readonly pan: AudioParam;
+}
+
+declare var StereoPannerNode: {
+    prototype: StereoPannerNode;
+    new(): StereoPannerNode;
+};
+
+interface Storage {
+    readonly length: number;
+    clear(): void;
+    getItem(key: string): string | null;
+    key(index: number): string | null;
+    removeItem(key: string): void;
+    setItem(key: string, data: string): void;
+    [key: string]: any;
+    [index: number]: string;
+}
+
+declare var Storage: {
+    prototype: Storage;
+    new(): Storage;
+};
+
+interface StorageEvent extends Event {
+    readonly url: string;
+    key?: string;
+    oldValue?: string;
+    newValue?: string;
+    storageArea?: Storage;
+}
+
+declare var StorageEvent: {
+    prototype: StorageEvent;
+    new (type: string, eventInitDict?: StorageEventInit): StorageEvent;
+};
+
+interface StyleMedia {
+    readonly type: string;
+    matchMedium(mediaquery: string): boolean;
+}
+
+declare var StyleMedia: {
+    prototype: StyleMedia;
+    new(): StyleMedia;
+};
+
+interface StyleSheet {
+    disabled: boolean;
+    readonly href: string;
+    readonly media: MediaList;
+    readonly ownerNode: Node;
+    readonly parentStyleSheet: StyleSheet;
+    readonly title: string;
+    readonly type: string;
+}
+
+declare var StyleSheet: {
+    prototype: StyleSheet;
+    new(): StyleSheet;
+};
+
+interface StyleSheetList {
+    readonly length: number;
+    item(index?: number): StyleSheet;
+    [index: number]: StyleSheet;
+}
+
+declare var StyleSheetList: {
+    prototype: StyleSheetList;
+    new(): StyleSheetList;
+};
+
+interface StyleSheetPageList {
+    readonly length: number;
+    item(index: number): CSSPageRule;
+    [index: number]: CSSPageRule;
+}
+
+declare var StyleSheetPageList: {
+    prototype: StyleSheetPageList;
+    new(): StyleSheetPageList;
+};
+
+interface SubtleCrypto {
+    decrypt(algorithm: string | RsaOaepParams | AesCtrParams | AesCbcParams | AesCmacParams | AesGcmParams | AesCfbParams, key: CryptoKey, data: BufferSource): PromiseLike<ArrayBuffer>;
+    deriveBits(algorithm: string | EcdhKeyDeriveParams | DhKeyDeriveParams | ConcatParams | HkdfCtrParams | Pbkdf2Params, baseKey: CryptoKey, length: number): PromiseLike<ArrayBuffer>;
+    deriveKey(algorithm: string | EcdhKeyDeriveParams | DhKeyDeriveParams | ConcatParams | HkdfCtrParams | Pbkdf2Params, baseKey: CryptoKey, derivedKeyType: string | AesDerivedKeyParams | HmacImportParams | ConcatParams | HkdfCtrParams | Pbkdf2Params, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
+    digest(algorithm: AlgorithmIdentifier, data: BufferSource): PromiseLike<ArrayBuffer>;
+    encrypt(algorithm: string | RsaOaepParams | AesCtrParams | AesCbcParams | AesCmacParams | AesGcmParams | AesCfbParams, key: CryptoKey, data: BufferSource): PromiseLike<ArrayBuffer>;
+    exportKey(format: "jwk", key: CryptoKey): PromiseLike<JsonWebKey>;
+    exportKey(format: "raw" | "pkcs8" | "spki", key: CryptoKey): PromiseLike<ArrayBuffer>;
+    exportKey(format: string, key: CryptoKey): PromiseLike<JsonWebKey | ArrayBuffer>;
+    generateKey(algorithm: string, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKeyPair | CryptoKey>;
+    generateKey(algorithm: RsaHashedKeyGenParams | EcKeyGenParams | DhKeyGenParams, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKeyPair>;
+    generateKey(algorithm: AesKeyGenParams | HmacKeyGenParams | Pbkdf2Params, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
+    importKey(format: "jwk", keyData: JsonWebKey, algorithm: string | RsaHashedImportParams | EcKeyImportParams | HmacImportParams | DhImportKeyParams, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
+    importKey(format: "raw" | "pkcs8" | "spki", keyData: BufferSource, algorithm: string | RsaHashedImportParams | EcKeyImportParams | HmacImportParams | DhImportKeyParams, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
+    importKey(format: string, keyData: JsonWebKey | BufferSource, algorithm: string | RsaHashedImportParams | EcKeyImportParams | HmacImportParams | DhImportKeyParams, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
+    sign(algorithm: string | RsaPssParams | EcdsaParams | AesCmacParams, key: CryptoKey, data: BufferSource): PromiseLike<ArrayBuffer>;
+    unwrapKey(format: string, wrappedKey: BufferSource, unwrappingKey: CryptoKey, unwrapAlgorithm: AlgorithmIdentifier, unwrappedKeyAlgorithm: AlgorithmIdentifier, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
+    verify(algorithm: string | RsaPssParams | EcdsaParams | AesCmacParams, key: CryptoKey, signature: BufferSource, data: BufferSource): PromiseLike<boolean>;
+    wrapKey(format: string, key: CryptoKey, wrappingKey: CryptoKey, wrapAlgorithm: AlgorithmIdentifier): PromiseLike<ArrayBuffer>;
+}
+
+declare var SubtleCrypto: {
+    prototype: SubtleCrypto;
+    new(): SubtleCrypto;
+};
+
+interface SVGAElement extends SVGGraphicsElement, SVGURIReference {
+    readonly target: SVGAnimatedString;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGAElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGAElement: {
+    prototype: SVGAElement;
+    new(): SVGAElement;
+};
+
+interface SVGAngle {
+    readonly unitType: number;
+    value: number;
+    valueAsString: string;
+    valueInSpecifiedUnits: number;
+    convertToSpecifiedUnits(unitType: number): void;
+    newValueSpecifiedUnits(unitType: number, valueInSpecifiedUnits: number): void;
+    readonly SVG_ANGLETYPE_DEG: number;
+    readonly SVG_ANGLETYPE_GRAD: number;
+    readonly SVG_ANGLETYPE_RAD: number;
+    readonly SVG_ANGLETYPE_UNKNOWN: number;
+    readonly SVG_ANGLETYPE_UNSPECIFIED: number;
+}
+
+declare var SVGAngle: {
+    prototype: SVGAngle;
+    new(): SVGAngle;
+    readonly SVG_ANGLETYPE_DEG: number;
+    readonly SVG_ANGLETYPE_GRAD: number;
+    readonly SVG_ANGLETYPE_RAD: number;
+    readonly SVG_ANGLETYPE_UNKNOWN: number;
+    readonly SVG_ANGLETYPE_UNSPECIFIED: number;
+};
+
+interface SVGAnimatedAngle {
+    readonly animVal: SVGAngle;
+    readonly baseVal: SVGAngle;
+}
+
+declare var SVGAnimatedAngle: {
+    prototype: SVGAnimatedAngle;
+    new(): SVGAnimatedAngle;
+};
+
+interface SVGAnimatedBoolean {
+    readonly animVal: boolean;
+    baseVal: boolean;
+}
+
+declare var SVGAnimatedBoolean: {
+    prototype: SVGAnimatedBoolean;
+    new(): SVGAnimatedBoolean;
+};
+
+interface SVGAnimatedEnumeration {
+    readonly animVal: number;
+    baseVal: number;
+}
+
+declare var SVGAnimatedEnumeration: {
+    prototype: SVGAnimatedEnumeration;
+    new(): SVGAnimatedEnumeration;
+};
+
+interface SVGAnimatedInteger {
+    readonly animVal: number;
+    baseVal: number;
+}
+
+declare var SVGAnimatedInteger: {
+    prototype: SVGAnimatedInteger;
+    new(): SVGAnimatedInteger;
+};
+
+interface SVGAnimatedLength {
+    readonly animVal: SVGLength;
+    readonly baseVal: SVGLength;
+}
+
+declare var SVGAnimatedLength: {
+    prototype: SVGAnimatedLength;
+    new(): SVGAnimatedLength;
+};
+
+interface SVGAnimatedLengthList {
+    readonly animVal: SVGLengthList;
+    readonly baseVal: SVGLengthList;
+}
+
+declare var SVGAnimatedLengthList: {
+    prototype: SVGAnimatedLengthList;
+    new(): SVGAnimatedLengthList;
+};
+
+interface SVGAnimatedNumber {
+    readonly animVal: number;
+    baseVal: number;
+}
+
+declare var SVGAnimatedNumber: {
+    prototype: SVGAnimatedNumber;
+    new(): SVGAnimatedNumber;
+};
+
+interface SVGAnimatedNumberList {
+    readonly animVal: SVGNumberList;
+    readonly baseVal: SVGNumberList;
+}
+
+declare var SVGAnimatedNumberList: {
+    prototype: SVGAnimatedNumberList;
+    new(): SVGAnimatedNumberList;
+};
+
+interface SVGAnimatedPreserveAspectRatio {
+    readonly animVal: SVGPreserveAspectRatio;
+    readonly baseVal: SVGPreserveAspectRatio;
+}
+
+declare var SVGAnimatedPreserveAspectRatio: {
+    prototype: SVGAnimatedPreserveAspectRatio;
+    new(): SVGAnimatedPreserveAspectRatio;
+};
+
+interface SVGAnimatedRect {
+    readonly animVal: SVGRect;
+    readonly baseVal: SVGRect;
+}
+
+declare var SVGAnimatedRect: {
+    prototype: SVGAnimatedRect;
+    new(): SVGAnimatedRect;
+};
+
+interface SVGAnimatedString {
+    readonly animVal: string;
+    baseVal: string;
+}
+
+declare var SVGAnimatedString: {
+    prototype: SVGAnimatedString;
+    new(): SVGAnimatedString;
+};
+
+interface SVGAnimatedTransformList {
+    readonly animVal: SVGTransformList;
+    readonly baseVal: SVGTransformList;
+}
+
+declare var SVGAnimatedTransformList: {
+    prototype: SVGAnimatedTransformList;
+    new(): SVGAnimatedTransformList;
+};
+
+interface SVGCircleElement extends SVGGraphicsElement {
+    readonly cx: SVGAnimatedLength;
+    readonly cy: SVGAnimatedLength;
+    readonly r: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGCircleElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGCircleElement: {
+    prototype: SVGCircleElement;
+    new(): SVGCircleElement;
+};
+
+interface SVGClipPathElement extends SVGGraphicsElement, SVGUnitTypes {
+    readonly clipPathUnits: SVGAnimatedEnumeration;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGClipPathElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGClipPathElement: {
+    prototype: SVGClipPathElement;
+    new(): SVGClipPathElement;
+};
+
+interface SVGComponentTransferFunctionElement extends SVGElement {
+    readonly amplitude: SVGAnimatedNumber;
+    readonly exponent: SVGAnimatedNumber;
+    readonly intercept: SVGAnimatedNumber;
+    readonly offset: SVGAnimatedNumber;
+    readonly slope: SVGAnimatedNumber;
+    readonly tableValues: SVGAnimatedNumberList;
+    readonly type: SVGAnimatedEnumeration;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_DISCRETE: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_GAMMA: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_IDENTITY: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_LINEAR: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_TABLE: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGComponentTransferFunctionElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGComponentTransferFunctionElement: {
+    prototype: SVGComponentTransferFunctionElement;
+    new(): SVGComponentTransferFunctionElement;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_DISCRETE: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_GAMMA: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_IDENTITY: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_LINEAR: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_TABLE: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_UNKNOWN: number;
+};
+
+interface SVGDefsElement extends SVGGraphicsElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGDefsElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGDefsElement: {
+    prototype: SVGDefsElement;
+    new(): SVGDefsElement;
+};
+
+interface SVGDescElement extends SVGElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGDescElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGDescElement: {
+    prototype: SVGDescElement;
+    new(): SVGDescElement;
+};
+
+interface SVGElementEventMap extends ElementEventMap {
+    "click": MouseEvent;
+    "dblclick": MouseEvent;
+    "focusin": FocusEvent;
+    "focusout": FocusEvent;
+    "load": Event;
+    "mousedown": MouseEvent;
+    "mousemove": MouseEvent;
+    "mouseout": MouseEvent;
+    "mouseover": MouseEvent;
+    "mouseup": MouseEvent;
+}
+
+interface SVGElement extends Element {
+    className: any;
+    onclick: (this: SVGElement, ev: MouseEvent) => any;
+    ondblclick: (this: SVGElement, ev: MouseEvent) => any;
+    onfocusin: (this: SVGElement, ev: FocusEvent) => any;
+    onfocusout: (this: SVGElement, ev: FocusEvent) => any;
+    onload: (this: SVGElement, ev: Event) => any;
+    onmousedown: (this: SVGElement, ev: MouseEvent) => any;
+    onmousemove: (this: SVGElement, ev: MouseEvent) => any;
+    onmouseout: (this: SVGElement, ev: MouseEvent) => any;
+    onmouseover: (this: SVGElement, ev: MouseEvent) => any;
+    onmouseup: (this: SVGElement, ev: MouseEvent) => any;
+    readonly ownerSVGElement: SVGSVGElement;
+    readonly style: CSSStyleDeclaration;
+    readonly viewportElement: SVGElement;
+    xmlbase: string;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGElement: {
+    prototype: SVGElement;
+    new(): SVGElement;
+};
+
+interface SVGElementInstance extends EventTarget {
+    readonly childNodes: SVGElementInstanceList;
+    readonly correspondingElement: SVGElement;
+    readonly correspondingUseElement: SVGUseElement;
+    readonly firstChild: SVGElementInstance;
+    readonly lastChild: SVGElementInstance;
+    readonly nextSibling: SVGElementInstance;
+    readonly parentNode: SVGElementInstance;
+    readonly previousSibling: SVGElementInstance;
+}
+
+declare var SVGElementInstance: {
+    prototype: SVGElementInstance;
+    new(): SVGElementInstance;
+};
+
+interface SVGElementInstanceList {
+    readonly length: number;
+    item(index: number): SVGElementInstance;
+}
+
+declare var SVGElementInstanceList: {
+    prototype: SVGElementInstanceList;
+    new(): SVGElementInstanceList;
+};
+
+interface SVGEllipseElement extends SVGGraphicsElement {
+    readonly cx: SVGAnimatedLength;
+    readonly cy: SVGAnimatedLength;
+    readonly rx: SVGAnimatedLength;
+    readonly ry: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGEllipseElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGEllipseElement: {
+    prototype: SVGEllipseElement;
+    new(): SVGEllipseElement;
+};
+
+interface SVGFEBlendElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    readonly in2: SVGAnimatedString;
+    readonly mode: SVGAnimatedEnumeration;
+    readonly SVG_FEBLEND_MODE_COLOR: number;
+    readonly SVG_FEBLEND_MODE_COLOR_BURN: number;
+    readonly SVG_FEBLEND_MODE_COLOR_DODGE: number;
+    readonly SVG_FEBLEND_MODE_DARKEN: number;
+    readonly SVG_FEBLEND_MODE_DIFFERENCE: number;
+    readonly SVG_FEBLEND_MODE_EXCLUSION: number;
+    readonly SVG_FEBLEND_MODE_HARD_LIGHT: number;
+    readonly SVG_FEBLEND_MODE_HUE: number;
+    readonly SVG_FEBLEND_MODE_LIGHTEN: number;
+    readonly SVG_FEBLEND_MODE_LUMINOSITY: number;
+    readonly SVG_FEBLEND_MODE_MULTIPLY: number;
+    readonly SVG_FEBLEND_MODE_NORMAL: number;
+    readonly SVG_FEBLEND_MODE_OVERLAY: number;
+    readonly SVG_FEBLEND_MODE_SATURATION: number;
+    readonly SVG_FEBLEND_MODE_SCREEN: number;
+    readonly SVG_FEBLEND_MODE_SOFT_LIGHT: number;
+    readonly SVG_FEBLEND_MODE_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEBlendElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEBlendElement: {
+    prototype: SVGFEBlendElement;
+    new(): SVGFEBlendElement;
+    readonly SVG_FEBLEND_MODE_COLOR: number;
+    readonly SVG_FEBLEND_MODE_COLOR_BURN: number;
+    readonly SVG_FEBLEND_MODE_COLOR_DODGE: number;
+    readonly SVG_FEBLEND_MODE_DARKEN: number;
+    readonly SVG_FEBLEND_MODE_DIFFERENCE: number;
+    readonly SVG_FEBLEND_MODE_EXCLUSION: number;
+    readonly SVG_FEBLEND_MODE_HARD_LIGHT: number;
+    readonly SVG_FEBLEND_MODE_HUE: number;
+    readonly SVG_FEBLEND_MODE_LIGHTEN: number;
+    readonly SVG_FEBLEND_MODE_LUMINOSITY: number;
+    readonly SVG_FEBLEND_MODE_MULTIPLY: number;
+    readonly SVG_FEBLEND_MODE_NORMAL: number;
+    readonly SVG_FEBLEND_MODE_OVERLAY: number;
+    readonly SVG_FEBLEND_MODE_SATURATION: number;
+    readonly SVG_FEBLEND_MODE_SCREEN: number;
+    readonly SVG_FEBLEND_MODE_SOFT_LIGHT: number;
+    readonly SVG_FEBLEND_MODE_UNKNOWN: number;
+};
+
+interface SVGFEColorMatrixElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    readonly type: SVGAnimatedEnumeration;
+    readonly values: SVGAnimatedNumberList;
+    readonly SVG_FECOLORMATRIX_TYPE_HUEROTATE: number;
+    readonly SVG_FECOLORMATRIX_TYPE_LUMINANCETOALPHA: number;
+    readonly SVG_FECOLORMATRIX_TYPE_MATRIX: number;
+    readonly SVG_FECOLORMATRIX_TYPE_SATURATE: number;
+    readonly SVG_FECOLORMATRIX_TYPE_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEColorMatrixElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEColorMatrixElement: {
+    prototype: SVGFEColorMatrixElement;
+    new(): SVGFEColorMatrixElement;
+    readonly SVG_FECOLORMATRIX_TYPE_HUEROTATE: number;
+    readonly SVG_FECOLORMATRIX_TYPE_LUMINANCETOALPHA: number;
+    readonly SVG_FECOLORMATRIX_TYPE_MATRIX: number;
+    readonly SVG_FECOLORMATRIX_TYPE_SATURATE: number;
+    readonly SVG_FECOLORMATRIX_TYPE_UNKNOWN: number;
+};
+
+interface SVGFEComponentTransferElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEComponentTransferElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEComponentTransferElement: {
+    prototype: SVGFEComponentTransferElement;
+    new(): SVGFEComponentTransferElement;
+};
+
+interface SVGFECompositeElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    readonly in2: SVGAnimatedString;
+    readonly k1: SVGAnimatedNumber;
+    readonly k2: SVGAnimatedNumber;
+    readonly k3: SVGAnimatedNumber;
+    readonly k4: SVGAnimatedNumber;
+    readonly operator: SVGAnimatedEnumeration;
+    readonly SVG_FECOMPOSITE_OPERATOR_ARITHMETIC: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_ATOP: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_IN: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_OUT: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_OVER: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_UNKNOWN: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_XOR: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFECompositeElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFECompositeElement: {
+    prototype: SVGFECompositeElement;
+    new(): SVGFECompositeElement;
+    readonly SVG_FECOMPOSITE_OPERATOR_ARITHMETIC: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_ATOP: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_IN: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_OUT: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_OVER: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_UNKNOWN: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_XOR: number;
+};
+
+interface SVGFEConvolveMatrixElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly bias: SVGAnimatedNumber;
+    readonly divisor: SVGAnimatedNumber;
+    readonly edgeMode: SVGAnimatedEnumeration;
+    readonly in1: SVGAnimatedString;
+    readonly kernelMatrix: SVGAnimatedNumberList;
+    readonly kernelUnitLengthX: SVGAnimatedNumber;
+    readonly kernelUnitLengthY: SVGAnimatedNumber;
+    readonly orderX: SVGAnimatedInteger;
+    readonly orderY: SVGAnimatedInteger;
+    readonly preserveAlpha: SVGAnimatedBoolean;
+    readonly targetX: SVGAnimatedInteger;
+    readonly targetY: SVGAnimatedInteger;
+    readonly SVG_EDGEMODE_DUPLICATE: number;
+    readonly SVG_EDGEMODE_NONE: number;
+    readonly SVG_EDGEMODE_UNKNOWN: number;
+    readonly SVG_EDGEMODE_WRAP: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEConvolveMatrixElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEConvolveMatrixElement: {
+    prototype: SVGFEConvolveMatrixElement;
+    new(): SVGFEConvolveMatrixElement;
+    readonly SVG_EDGEMODE_DUPLICATE: number;
+    readonly SVG_EDGEMODE_NONE: number;
+    readonly SVG_EDGEMODE_UNKNOWN: number;
+    readonly SVG_EDGEMODE_WRAP: number;
+};
+
+interface SVGFEDiffuseLightingElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly diffuseConstant: SVGAnimatedNumber;
+    readonly in1: SVGAnimatedString;
+    readonly kernelUnitLengthX: SVGAnimatedNumber;
+    readonly kernelUnitLengthY: SVGAnimatedNumber;
+    readonly surfaceScale: SVGAnimatedNumber;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEDiffuseLightingElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEDiffuseLightingElement: {
+    prototype: SVGFEDiffuseLightingElement;
+    new(): SVGFEDiffuseLightingElement;
+};
+
+interface SVGFEDisplacementMapElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    readonly in2: SVGAnimatedString;
+    readonly scale: SVGAnimatedNumber;
+    readonly xChannelSelector: SVGAnimatedEnumeration;
+    readonly yChannelSelector: SVGAnimatedEnumeration;
+    readonly SVG_CHANNEL_A: number;
+    readonly SVG_CHANNEL_B: number;
+    readonly SVG_CHANNEL_G: number;
+    readonly SVG_CHANNEL_R: number;
+    readonly SVG_CHANNEL_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEDisplacementMapElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEDisplacementMapElement: {
+    prototype: SVGFEDisplacementMapElement;
+    new(): SVGFEDisplacementMapElement;
+    readonly SVG_CHANNEL_A: number;
+    readonly SVG_CHANNEL_B: number;
+    readonly SVG_CHANNEL_G: number;
+    readonly SVG_CHANNEL_R: number;
+    readonly SVG_CHANNEL_UNKNOWN: number;
+};
+
+interface SVGFEDistantLightElement extends SVGElement {
+    readonly azimuth: SVGAnimatedNumber;
+    readonly elevation: SVGAnimatedNumber;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEDistantLightElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEDistantLightElement: {
+    prototype: SVGFEDistantLightElement;
+    new(): SVGFEDistantLightElement;
+};
+
+interface SVGFEFloodElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEFloodElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEFloodElement: {
+    prototype: SVGFEFloodElement;
+    new(): SVGFEFloodElement;
+};
+
+interface SVGFEFuncAElement extends SVGComponentTransferFunctionElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEFuncAElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEFuncAElement: {
+    prototype: SVGFEFuncAElement;
+    new(): SVGFEFuncAElement;
+};
+
+interface SVGFEFuncBElement extends SVGComponentTransferFunctionElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEFuncBElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEFuncBElement: {
+    prototype: SVGFEFuncBElement;
+    new(): SVGFEFuncBElement;
+};
+
+interface SVGFEFuncGElement extends SVGComponentTransferFunctionElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEFuncGElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEFuncGElement: {
+    prototype: SVGFEFuncGElement;
+    new(): SVGFEFuncGElement;
+};
+
+interface SVGFEFuncRElement extends SVGComponentTransferFunctionElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEFuncRElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEFuncRElement: {
+    prototype: SVGFEFuncRElement;
+    new(): SVGFEFuncRElement;
+};
+
+interface SVGFEGaussianBlurElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    readonly stdDeviationX: SVGAnimatedNumber;
+    readonly stdDeviationY: SVGAnimatedNumber;
+    setStdDeviation(stdDeviationX: number, stdDeviationY: number): void;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEGaussianBlurElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEGaussianBlurElement: {
+    prototype: SVGFEGaussianBlurElement;
+    new(): SVGFEGaussianBlurElement;
+};
+
+interface SVGFEImageElement extends SVGElement, SVGFilterPrimitiveStandardAttributes, SVGURIReference {
+    readonly preserveAspectRatio: SVGAnimatedPreserveAspectRatio;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEImageElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEImageElement: {
+    prototype: SVGFEImageElement;
+    new(): SVGFEImageElement;
+};
+
+interface SVGFEMergeElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEMergeElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEMergeElement: {
+    prototype: SVGFEMergeElement;
+    new(): SVGFEMergeElement;
+};
+
+interface SVGFEMergeNodeElement extends SVGElement {
+    readonly in1: SVGAnimatedString;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEMergeNodeElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEMergeNodeElement: {
+    prototype: SVGFEMergeNodeElement;
+    new(): SVGFEMergeNodeElement;
+};
+
+interface SVGFEMorphologyElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    readonly operator: SVGAnimatedEnumeration;
+    readonly radiusX: SVGAnimatedNumber;
+    readonly radiusY: SVGAnimatedNumber;
+    readonly SVG_MORPHOLOGY_OPERATOR_DILATE: number;
+    readonly SVG_MORPHOLOGY_OPERATOR_ERODE: number;
+    readonly SVG_MORPHOLOGY_OPERATOR_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEMorphologyElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEMorphologyElement: {
+    prototype: SVGFEMorphologyElement;
+    new(): SVGFEMorphologyElement;
+    readonly SVG_MORPHOLOGY_OPERATOR_DILATE: number;
+    readonly SVG_MORPHOLOGY_OPERATOR_ERODE: number;
+    readonly SVG_MORPHOLOGY_OPERATOR_UNKNOWN: number;
+};
+
+interface SVGFEOffsetElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly dx: SVGAnimatedNumber;
+    readonly dy: SVGAnimatedNumber;
+    readonly in1: SVGAnimatedString;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEOffsetElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEOffsetElement: {
+    prototype: SVGFEOffsetElement;
+    new(): SVGFEOffsetElement;
+};
+
+interface SVGFEPointLightElement extends SVGElement {
+    readonly x: SVGAnimatedNumber;
+    readonly y: SVGAnimatedNumber;
+    readonly z: SVGAnimatedNumber;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEPointLightElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEPointLightElement: {
+    prototype: SVGFEPointLightElement;
+    new(): SVGFEPointLightElement;
+};
+
+interface SVGFESpecularLightingElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    readonly kernelUnitLengthX: SVGAnimatedNumber;
+    readonly kernelUnitLengthY: SVGAnimatedNumber;
+    readonly specularConstant: SVGAnimatedNumber;
+    readonly specularExponent: SVGAnimatedNumber;
+    readonly surfaceScale: SVGAnimatedNumber;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFESpecularLightingElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFESpecularLightingElement: {
+    prototype: SVGFESpecularLightingElement;
+    new(): SVGFESpecularLightingElement;
+};
+
+interface SVGFESpotLightElement extends SVGElement {
+    readonly limitingConeAngle: SVGAnimatedNumber;
+    readonly pointsAtX: SVGAnimatedNumber;
+    readonly pointsAtY: SVGAnimatedNumber;
+    readonly pointsAtZ: SVGAnimatedNumber;
+    readonly specularExponent: SVGAnimatedNumber;
+    readonly x: SVGAnimatedNumber;
+    readonly y: SVGAnimatedNumber;
+    readonly z: SVGAnimatedNumber;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFESpotLightElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFESpotLightElement: {
+    prototype: SVGFESpotLightElement;
+    new(): SVGFESpotLightElement;
+};
+
+interface SVGFETileElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFETileElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFETileElement: {
+    prototype: SVGFETileElement;
+    new(): SVGFETileElement;
+};
+
+interface SVGFETurbulenceElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly baseFrequencyX: SVGAnimatedNumber;
+    readonly baseFrequencyY: SVGAnimatedNumber;
+    readonly numOctaves: SVGAnimatedInteger;
+    readonly seed: SVGAnimatedNumber;
+    readonly stitchTiles: SVGAnimatedEnumeration;
+    readonly type: SVGAnimatedEnumeration;
+    readonly SVG_STITCHTYPE_NOSTITCH: number;
+    readonly SVG_STITCHTYPE_STITCH: number;
+    readonly SVG_STITCHTYPE_UNKNOWN: number;
+    readonly SVG_TURBULENCE_TYPE_FRACTALNOISE: number;
+    readonly SVG_TURBULENCE_TYPE_TURBULENCE: number;
+    readonly SVG_TURBULENCE_TYPE_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFETurbulenceElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFETurbulenceElement: {
+    prototype: SVGFETurbulenceElement;
+    new(): SVGFETurbulenceElement;
+    readonly SVG_STITCHTYPE_NOSTITCH: number;
+    readonly SVG_STITCHTYPE_STITCH: number;
+    readonly SVG_STITCHTYPE_UNKNOWN: number;
+    readonly SVG_TURBULENCE_TYPE_FRACTALNOISE: number;
+    readonly SVG_TURBULENCE_TYPE_TURBULENCE: number;
+    readonly SVG_TURBULENCE_TYPE_UNKNOWN: number;
+};
+
+interface SVGFilterElement extends SVGElement, SVGUnitTypes, SVGURIReference {
+    readonly filterResX: SVGAnimatedInteger;
+    readonly filterResY: SVGAnimatedInteger;
+    readonly filterUnits: SVGAnimatedEnumeration;
+    readonly height: SVGAnimatedLength;
+    readonly primitiveUnits: SVGAnimatedEnumeration;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+    setFilterRes(filterResX: number, filterResY: number): void;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFilterElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFilterElement: {
+    prototype: SVGFilterElement;
+    new(): SVGFilterElement;
+};
+
+interface SVGForeignObjectElement extends SVGGraphicsElement {
+    readonly height: SVGAnimatedLength;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGForeignObjectElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGForeignObjectElement: {
+    prototype: SVGForeignObjectElement;
+    new(): SVGForeignObjectElement;
+};
+
+interface SVGGElement extends SVGGraphicsElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGGElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGGElement: {
+    prototype: SVGGElement;
+    new(): SVGGElement;
+};
+
+interface SVGGradientElement extends SVGElement, SVGUnitTypes, SVGURIReference {
+    readonly gradientTransform: SVGAnimatedTransformList;
+    readonly gradientUnits: SVGAnimatedEnumeration;
+    readonly spreadMethod: SVGAnimatedEnumeration;
+    readonly SVG_SPREADMETHOD_PAD: number;
+    readonly SVG_SPREADMETHOD_REFLECT: number;
+    readonly SVG_SPREADMETHOD_REPEAT: number;
+    readonly SVG_SPREADMETHOD_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGGradientElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGGradientElement: {
+    prototype: SVGGradientElement;
+    new(): SVGGradientElement;
+    readonly SVG_SPREADMETHOD_PAD: number;
+    readonly SVG_SPREADMETHOD_REFLECT: number;
+    readonly SVG_SPREADMETHOD_REPEAT: number;
+    readonly SVG_SPREADMETHOD_UNKNOWN: number;
+};
+
+interface SVGGraphicsElement extends SVGElement, SVGTests {
+    readonly farthestViewportElement: SVGElement;
+    readonly nearestViewportElement: SVGElement;
+    readonly transform: SVGAnimatedTransformList;
+    getBBox(): SVGRect;
+    getCTM(): SVGMatrix;
+    getScreenCTM(): SVGMatrix;
+    getTransformToElement(element: SVGElement): SVGMatrix;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGGraphicsElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGGraphicsElement: {
+    prototype: SVGGraphicsElement;
+    new(): SVGGraphicsElement;
+};
+
+interface SVGImageElement extends SVGGraphicsElement, SVGURIReference {
+    readonly height: SVGAnimatedLength;
+    readonly preserveAspectRatio: SVGAnimatedPreserveAspectRatio;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGImageElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGImageElement: {
+    prototype: SVGImageElement;
+    new(): SVGImageElement;
+};
+
+interface SVGLength {
+    readonly unitType: number;
+    value: number;
+    valueAsString: string;
+    valueInSpecifiedUnits: number;
+    convertToSpecifiedUnits(unitType: number): void;
+    newValueSpecifiedUnits(unitType: number, valueInSpecifiedUnits: number): void;
+    readonly SVG_LENGTHTYPE_CM: number;
+    readonly SVG_LENGTHTYPE_EMS: number;
+    readonly SVG_LENGTHTYPE_EXS: number;
+    readonly SVG_LENGTHTYPE_IN: number;
+    readonly SVG_LENGTHTYPE_MM: number;
+    readonly SVG_LENGTHTYPE_NUMBER: number;
+    readonly SVG_LENGTHTYPE_PC: number;
+    readonly SVG_LENGTHTYPE_PERCENTAGE: number;
+    readonly SVG_LENGTHTYPE_PT: number;
+    readonly SVG_LENGTHTYPE_PX: number;
+    readonly SVG_LENGTHTYPE_UNKNOWN: number;
+}
+
+declare var SVGLength: {
+    prototype: SVGLength;
+    new(): SVGLength;
+    readonly SVG_LENGTHTYPE_CM: number;
+    readonly SVG_LENGTHTYPE_EMS: number;
+    readonly SVG_LENGTHTYPE_EXS: number;
+    readonly SVG_LENGTHTYPE_IN: number;
+    readonly SVG_LENGTHTYPE_MM: number;
+    readonly SVG_LENGTHTYPE_NUMBER: number;
+    readonly SVG_LENGTHTYPE_PC: number;
+    readonly SVG_LENGTHTYPE_PERCENTAGE: number;
+    readonly SVG_LENGTHTYPE_PT: number;
+    readonly SVG_LENGTHTYPE_PX: number;
+    readonly SVG_LENGTHTYPE_UNKNOWN: number;
+};
+
+interface SVGLengthList {
+    readonly numberOfItems: number;
+    appendItem(newItem: SVGLength): SVGLength;
+    clear(): void;
+    getItem(index: number): SVGLength;
+    initialize(newItem: SVGLength): SVGLength;
+    insertItemBefore(newItem: SVGLength, index: number): SVGLength;
+    removeItem(index: number): SVGLength;
+    replaceItem(newItem: SVGLength, index: number): SVGLength;
+}
+
+declare var SVGLengthList: {
+    prototype: SVGLengthList;
+    new(): SVGLengthList;
+};
+
+interface SVGLinearGradientElement extends SVGGradientElement {
+    readonly x1: SVGAnimatedLength;
+    readonly x2: SVGAnimatedLength;
+    readonly y1: SVGAnimatedLength;
+    readonly y2: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGLinearGradientElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGLinearGradientElement: {
+    prototype: SVGLinearGradientElement;
+    new(): SVGLinearGradientElement;
+};
+
+interface SVGLineElement extends SVGGraphicsElement {
+    readonly x1: SVGAnimatedLength;
+    readonly x2: SVGAnimatedLength;
+    readonly y1: SVGAnimatedLength;
+    readonly y2: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGLineElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGLineElement: {
+    prototype: SVGLineElement;
+    new(): SVGLineElement;
+};
+
+interface SVGMarkerElement extends SVGElement, SVGFitToViewBox {
+    readonly markerHeight: SVGAnimatedLength;
+    readonly markerUnits: SVGAnimatedEnumeration;
+    readonly markerWidth: SVGAnimatedLength;
+    readonly orientAngle: SVGAnimatedAngle;
+    readonly orientType: SVGAnimatedEnumeration;
+    readonly refX: SVGAnimatedLength;
+    readonly refY: SVGAnimatedLength;
+    setOrientToAngle(angle: SVGAngle): void;
+    setOrientToAuto(): void;
+    readonly SVG_MARKER_ORIENT_ANGLE: number;
+    readonly SVG_MARKER_ORIENT_AUTO: number;
+    readonly SVG_MARKER_ORIENT_UNKNOWN: number;
+    readonly SVG_MARKERUNITS_STROKEWIDTH: number;
+    readonly SVG_MARKERUNITS_UNKNOWN: number;
+    readonly SVG_MARKERUNITS_USERSPACEONUSE: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGMarkerElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGMarkerElement: {
+    prototype: SVGMarkerElement;
+    new(): SVGMarkerElement;
+    readonly SVG_MARKER_ORIENT_ANGLE: number;
+    readonly SVG_MARKER_ORIENT_AUTO: number;
+    readonly SVG_MARKER_ORIENT_UNKNOWN: number;
+    readonly SVG_MARKERUNITS_STROKEWIDTH: number;
+    readonly SVG_MARKERUNITS_UNKNOWN: number;
+    readonly SVG_MARKERUNITS_USERSPACEONUSE: number;
+};
+
+interface SVGMaskElement extends SVGElement, SVGTests, SVGUnitTypes {
+    readonly height: SVGAnimatedLength;
+    readonly maskContentUnits: SVGAnimatedEnumeration;
+    readonly maskUnits: SVGAnimatedEnumeration;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGMaskElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGMaskElement: {
+    prototype: SVGMaskElement;
+    new(): SVGMaskElement;
+};
+
+interface SVGMatrix {
+    a: number;
+    b: number;
+    c: number;
+    d: number;
+    e: number;
+    f: number;
+    flipX(): SVGMatrix;
+    flipY(): SVGMatrix;
+    inverse(): SVGMatrix;
+    multiply(secondMatrix: SVGMatrix): SVGMatrix;
+    rotate(angle: number): SVGMatrix;
+    rotateFromVector(x: number, y: number): SVGMatrix;
+    scale(scaleFactor: number): SVGMatrix;
+    scaleNonUniform(scaleFactorX: number, scaleFactorY: number): SVGMatrix;
+    skewX(angle: number): SVGMatrix;
+    skewY(angle: number): SVGMatrix;
+    translate(x: number, y: number): SVGMatrix;
+}
+
+declare var SVGMatrix: {
+    prototype: SVGMatrix;
+    new(): SVGMatrix;
+};
+
+interface SVGMetadataElement extends SVGElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGMetadataElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGMetadataElement: {
+    prototype: SVGMetadataElement;
+    new(): SVGMetadataElement;
+};
+
+interface SVGNumber {
+    value: number;
+}
+
+declare var SVGNumber: {
+    prototype: SVGNumber;
+    new(): SVGNumber;
+};
+
+interface SVGNumberList {
+    readonly numberOfItems: number;
+    appendItem(newItem: SVGNumber): SVGNumber;
+    clear(): void;
+    getItem(index: number): SVGNumber;
+    initialize(newItem: SVGNumber): SVGNumber;
+    insertItemBefore(newItem: SVGNumber, index: number): SVGNumber;
+    removeItem(index: number): SVGNumber;
+    replaceItem(newItem: SVGNumber, index: number): SVGNumber;
+}
+
+declare var SVGNumberList: {
+    prototype: SVGNumberList;
+    new(): SVGNumberList;
+};
+
+interface SVGPathElement extends SVGGraphicsElement {
+    readonly pathSegList: SVGPathSegList;
+    createSVGPathSegArcAbs(x: number, y: number, r1: number, r2: number, angle: number, largeArcFlag: boolean, sweepFlag: boolean): SVGPathSegArcAbs;
+    createSVGPathSegArcRel(x: number, y: number, r1: number, r2: number, angle: number, largeArcFlag: boolean, sweepFlag: boolean): SVGPathSegArcRel;
+    createSVGPathSegClosePath(): SVGPathSegClosePath;
+    createSVGPathSegCurvetoCubicAbs(x: number, y: number, x1: number, y1: number, x2: number, y2: number): SVGPathSegCurvetoCubicAbs;
+    createSVGPathSegCurvetoCubicRel(x: number, y: number, x1: number, y1: number, x2: number, y2: number): SVGPathSegCurvetoCubicRel;
+    createSVGPathSegCurvetoCubicSmoothAbs(x: number, y: number, x2: number, y2: number): SVGPathSegCurvetoCubicSmoothAbs;
+    createSVGPathSegCurvetoCubicSmoothRel(x: number, y: number, x2: number, y2: number): SVGPathSegCurvetoCubicSmoothRel;
+    createSVGPathSegCurvetoQuadraticAbs(x: number, y: number, x1: number, y1: number): SVGPathSegCurvetoQuadraticAbs;
+    createSVGPathSegCurvetoQuadraticRel(x: number, y: number, x1: number, y1: number): SVGPathSegCurvetoQuadraticRel;
+    createSVGPathSegCurvetoQuadraticSmoothAbs(x: number, y: number): SVGPathSegCurvetoQuadraticSmoothAbs;
+    createSVGPathSegCurvetoQuadraticSmoothRel(x: number, y: number): SVGPathSegCurvetoQuadraticSmoothRel;
+    createSVGPathSegLinetoAbs(x: number, y: number): SVGPathSegLinetoAbs;
+    createSVGPathSegLinetoHorizontalAbs(x: number): SVGPathSegLinetoHorizontalAbs;
+    createSVGPathSegLinetoHorizontalRel(x: number): SVGPathSegLinetoHorizontalRel;
+    createSVGPathSegLinetoRel(x: number, y: number): SVGPathSegLinetoRel;
+    createSVGPathSegLinetoVerticalAbs(y: number): SVGPathSegLinetoVerticalAbs;
+    createSVGPathSegLinetoVerticalRel(y: number): SVGPathSegLinetoVerticalRel;
+    createSVGPathSegMovetoAbs(x: number, y: number): SVGPathSegMovetoAbs;
+    createSVGPathSegMovetoRel(x: number, y: number): SVGPathSegMovetoRel;
+    getPathSegAtLength(distance: number): number;
+    getPointAtLength(distance: number): SVGPoint;
+    getTotalLength(): number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGPathElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGPathElement: {
+    prototype: SVGPathElement;
+    new(): SVGPathElement;
+};
+
+interface SVGPathSeg {
+    readonly pathSegType: number;
+    readonly pathSegTypeAsLetter: string;
+    readonly PATHSEG_ARC_ABS: number;
+    readonly PATHSEG_ARC_REL: number;
+    readonly PATHSEG_CLOSEPATH: number;
+    readonly PATHSEG_CURVETO_CUBIC_ABS: number;
+    readonly PATHSEG_CURVETO_CUBIC_REL: number;
+    readonly PATHSEG_CURVETO_CUBIC_SMOOTH_ABS: number;
+    readonly PATHSEG_CURVETO_CUBIC_SMOOTH_REL: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_ABS: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_REL: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_SMOOTH_ABS: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_SMOOTH_REL: number;
+    readonly PATHSEG_LINETO_ABS: number;
+    readonly PATHSEG_LINETO_HORIZONTAL_ABS: number;
+    readonly PATHSEG_LINETO_HORIZONTAL_REL: number;
+    readonly PATHSEG_LINETO_REL: number;
+    readonly PATHSEG_LINETO_VERTICAL_ABS: number;
+    readonly PATHSEG_LINETO_VERTICAL_REL: number;
+    readonly PATHSEG_MOVETO_ABS: number;
+    readonly PATHSEG_MOVETO_REL: number;
+    readonly PATHSEG_UNKNOWN: number;
+}
+
+declare var SVGPathSeg: {
+    prototype: SVGPathSeg;
+    new(): SVGPathSeg;
+    readonly PATHSEG_ARC_ABS: number;
+    readonly PATHSEG_ARC_REL: number;
+    readonly PATHSEG_CLOSEPATH: number;
+    readonly PATHSEG_CURVETO_CUBIC_ABS: number;
+    readonly PATHSEG_CURVETO_CUBIC_REL: number;
+    readonly PATHSEG_CURVETO_CUBIC_SMOOTH_ABS: number;
+    readonly PATHSEG_CURVETO_CUBIC_SMOOTH_REL: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_ABS: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_REL: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_SMOOTH_ABS: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_SMOOTH_REL: number;
+    readonly PATHSEG_LINETO_ABS: number;
+    readonly PATHSEG_LINETO_HORIZONTAL_ABS: number;
+    readonly PATHSEG_LINETO_HORIZONTAL_REL: number;
+    readonly PATHSEG_LINETO_REL: number;
+    readonly PATHSEG_LINETO_VERTICAL_ABS: number;
+    readonly PATHSEG_LINETO_VERTICAL_REL: number;
+    readonly PATHSEG_MOVETO_ABS: number;
+    readonly PATHSEG_MOVETO_REL: number;
+    readonly PATHSEG_UNKNOWN: number;
+};
+
+interface SVGPathSegArcAbs extends SVGPathSeg {
+    angle: number;
+    largeArcFlag: boolean;
+    r1: number;
+    r2: number;
+    sweepFlag: boolean;
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegArcAbs: {
+    prototype: SVGPathSegArcAbs;
+    new(): SVGPathSegArcAbs;
+};
+
+interface SVGPathSegArcRel extends SVGPathSeg {
+    angle: number;
+    largeArcFlag: boolean;
+    r1: number;
+    r2: number;
+    sweepFlag: boolean;
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegArcRel: {
+    prototype: SVGPathSegArcRel;
+    new(): SVGPathSegArcRel;
+};
+
+interface SVGPathSegClosePath extends SVGPathSeg {
+}
+
+declare var SVGPathSegClosePath: {
+    prototype: SVGPathSegClosePath;
+    new(): SVGPathSegClosePath;
+};
+
+interface SVGPathSegCurvetoCubicAbs extends SVGPathSeg {
+    x: number;
+    x1: number;
+    x2: number;
+    y: number;
+    y1: number;
+    y2: number;
+}
+
+declare var SVGPathSegCurvetoCubicAbs: {
+    prototype: SVGPathSegCurvetoCubicAbs;
+    new(): SVGPathSegCurvetoCubicAbs;
+};
+
+interface SVGPathSegCurvetoCubicRel extends SVGPathSeg {
+    x: number;
+    x1: number;
+    x2: number;
+    y: number;
+    y1: number;
+    y2: number;
+}
+
+declare var SVGPathSegCurvetoCubicRel: {
+    prototype: SVGPathSegCurvetoCubicRel;
+    new(): SVGPathSegCurvetoCubicRel;
+};
+
+interface SVGPathSegCurvetoCubicSmoothAbs extends SVGPathSeg {
+    x: number;
+    x2: number;
+    y: number;
+    y2: number;
+}
+
+declare var SVGPathSegCurvetoCubicSmoothAbs: {
+    prototype: SVGPathSegCurvetoCubicSmoothAbs;
+    new(): SVGPathSegCurvetoCubicSmoothAbs;
+};
+
+interface SVGPathSegCurvetoCubicSmoothRel extends SVGPathSeg {
+    x: number;
+    x2: number;
+    y: number;
+    y2: number;
+}
+
+declare var SVGPathSegCurvetoCubicSmoothRel: {
+    prototype: SVGPathSegCurvetoCubicSmoothRel;
+    new(): SVGPathSegCurvetoCubicSmoothRel;
+};
+
+interface SVGPathSegCurvetoQuadraticAbs extends SVGPathSeg {
+    x: number;
+    x1: number;
+    y: number;
+    y1: number;
+}
+
+declare var SVGPathSegCurvetoQuadraticAbs: {
+    prototype: SVGPathSegCurvetoQuadraticAbs;
+    new(): SVGPathSegCurvetoQuadraticAbs;
+};
+
+interface SVGPathSegCurvetoQuadraticRel extends SVGPathSeg {
+    x: number;
+    x1: number;
+    y: number;
+    y1: number;
+}
+
+declare var SVGPathSegCurvetoQuadraticRel: {
+    prototype: SVGPathSegCurvetoQuadraticRel;
+    new(): SVGPathSegCurvetoQuadraticRel;
+};
+
+interface SVGPathSegCurvetoQuadraticSmoothAbs extends SVGPathSeg {
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegCurvetoQuadraticSmoothAbs: {
+    prototype: SVGPathSegCurvetoQuadraticSmoothAbs;
+    new(): SVGPathSegCurvetoQuadraticSmoothAbs;
+};
+
+interface SVGPathSegCurvetoQuadraticSmoothRel extends SVGPathSeg {
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegCurvetoQuadraticSmoothRel: {
+    prototype: SVGPathSegCurvetoQuadraticSmoothRel;
+    new(): SVGPathSegCurvetoQuadraticSmoothRel;
+};
+
+interface SVGPathSegLinetoAbs extends SVGPathSeg {
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegLinetoAbs: {
+    prototype: SVGPathSegLinetoAbs;
+    new(): SVGPathSegLinetoAbs;
+};
+
+interface SVGPathSegLinetoHorizontalAbs extends SVGPathSeg {
+    x: number;
+}
+
+declare var SVGPathSegLinetoHorizontalAbs: {
+    prototype: SVGPathSegLinetoHorizontalAbs;
+    new(): SVGPathSegLinetoHorizontalAbs;
+};
+
+interface SVGPathSegLinetoHorizontalRel extends SVGPathSeg {
+    x: number;
+}
+
+declare var SVGPathSegLinetoHorizontalRel: {
+    prototype: SVGPathSegLinetoHorizontalRel;
+    new(): SVGPathSegLinetoHorizontalRel;
+};
+
+interface SVGPathSegLinetoRel extends SVGPathSeg {
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegLinetoRel: {
+    prototype: SVGPathSegLinetoRel;
+    new(): SVGPathSegLinetoRel;
+};
+
+interface SVGPathSegLinetoVerticalAbs extends SVGPathSeg {
+    y: number;
+}
+
+declare var SVGPathSegLinetoVerticalAbs: {
+    prototype: SVGPathSegLinetoVerticalAbs;
+    new(): SVGPathSegLinetoVerticalAbs;
+};
+
+interface SVGPathSegLinetoVerticalRel extends SVGPathSeg {
+    y: number;
+}
+
+declare var SVGPathSegLinetoVerticalRel: {
+    prototype: SVGPathSegLinetoVerticalRel;
+    new(): SVGPathSegLinetoVerticalRel;
+};
+
+interface SVGPathSegList {
+    readonly numberOfItems: number;
+    appendItem(newItem: SVGPathSeg): SVGPathSeg;
+    clear(): void;
+    getItem(index: number): SVGPathSeg;
+    initialize(newItem: SVGPathSeg): SVGPathSeg;
+    insertItemBefore(newItem: SVGPathSeg, index: number): SVGPathSeg;
+    removeItem(index: number): SVGPathSeg;
+    replaceItem(newItem: SVGPathSeg, index: number): SVGPathSeg;
+}
+
+declare var SVGPathSegList: {
+    prototype: SVGPathSegList;
+    new(): SVGPathSegList;
+};
+
+interface SVGPathSegMovetoAbs extends SVGPathSeg {
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegMovetoAbs: {
+    prototype: SVGPathSegMovetoAbs;
+    new(): SVGPathSegMovetoAbs;
+};
+
+interface SVGPathSegMovetoRel extends SVGPathSeg {
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegMovetoRel: {
+    prototype: SVGPathSegMovetoRel;
+    new(): SVGPathSegMovetoRel;
+};
+
+interface SVGPatternElement extends SVGElement, SVGTests, SVGUnitTypes, SVGFitToViewBox, SVGURIReference {
+    readonly height: SVGAnimatedLength;
+    readonly patternContentUnits: SVGAnimatedEnumeration;
+    readonly patternTransform: SVGAnimatedTransformList;
+    readonly patternUnits: SVGAnimatedEnumeration;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGPatternElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGPatternElement: {
+    prototype: SVGPatternElement;
+    new(): SVGPatternElement;
+};
+
+interface SVGPoint {
+    x: number;
+    y: number;
+    matrixTransform(matrix: SVGMatrix): SVGPoint;
+}
+
+declare var SVGPoint: {
+    prototype: SVGPoint;
+    new(): SVGPoint;
+};
+
+interface SVGPointList {
+    readonly numberOfItems: number;
+    appendItem(newItem: SVGPoint): SVGPoint;
+    clear(): void;
+    getItem(index: number): SVGPoint;
+    initialize(newItem: SVGPoint): SVGPoint;
+    insertItemBefore(newItem: SVGPoint, index: number): SVGPoint;
+    removeItem(index: number): SVGPoint;
+    replaceItem(newItem: SVGPoint, index: number): SVGPoint;
+}
+
+declare var SVGPointList: {
+    prototype: SVGPointList;
+    new(): SVGPointList;
+};
+
+interface SVGPolygonElement extends SVGGraphicsElement, SVGAnimatedPoints {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGPolygonElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGPolygonElement: {
+    prototype: SVGPolygonElement;
+    new(): SVGPolygonElement;
+};
+
+interface SVGPolylineElement extends SVGGraphicsElement, SVGAnimatedPoints {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGPolylineElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGPolylineElement: {
+    prototype: SVGPolylineElement;
+    new(): SVGPolylineElement;
+};
+
+interface SVGPreserveAspectRatio {
+    align: number;
+    meetOrSlice: number;
+    readonly SVG_MEETORSLICE_MEET: number;
+    readonly SVG_MEETORSLICE_SLICE: number;
+    readonly SVG_MEETORSLICE_UNKNOWN: number;
+    readonly SVG_PRESERVEASPECTRATIO_NONE: number;
+    readonly SVG_PRESERVEASPECTRATIO_UNKNOWN: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMAXYMAX: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMAXYMID: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMAXYMIN: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMIDYMAX: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMIDYMID: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMIDYMIN: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMINYMAX: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMINYMID: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMINYMIN: number;
+}
+
+declare var SVGPreserveAspectRatio: {
+    prototype: SVGPreserveAspectRatio;
+    new(): SVGPreserveAspectRatio;
+    readonly SVG_MEETORSLICE_MEET: number;
+    readonly SVG_MEETORSLICE_SLICE: number;
+    readonly SVG_MEETORSLICE_UNKNOWN: number;
+    readonly SVG_PRESERVEASPECTRATIO_NONE: number;
+    readonly SVG_PRESERVEASPECTRATIO_UNKNOWN: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMAXYMAX: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMAXYMID: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMAXYMIN: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMIDYMAX: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMIDYMID: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMIDYMIN: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMINYMAX: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMINYMID: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMINYMIN: number;
+};
+
+interface SVGRadialGradientElement extends SVGGradientElement {
+    readonly cx: SVGAnimatedLength;
+    readonly cy: SVGAnimatedLength;
+    readonly fx: SVGAnimatedLength;
+    readonly fy: SVGAnimatedLength;
+    readonly r: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGRadialGradientElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGRadialGradientElement: {
+    prototype: SVGRadialGradientElement;
+    new(): SVGRadialGradientElement;
+};
+
+interface SVGRect {
+    height: number;
+    width: number;
+    x: number;
+    y: number;
+}
+
+declare var SVGRect: {
+    prototype: SVGRect;
+    new(): SVGRect;
+};
+
+interface SVGRectElement extends SVGGraphicsElement {
+    readonly height: SVGAnimatedLength;
+    readonly rx: SVGAnimatedLength;
+    readonly ry: SVGAnimatedLength;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGRectElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGRectElement: {
+    prototype: SVGRectElement;
+    new(): SVGRectElement;
+};
+
+interface SVGScriptElement extends SVGElement, SVGURIReference {
+    type: string;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGScriptElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGScriptElement: {
+    prototype: SVGScriptElement;
+    new(): SVGScriptElement;
+};
+
+interface SVGStopElement extends SVGElement {
+    readonly offset: SVGAnimatedNumber;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGStopElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGStopElement: {
+    prototype: SVGStopElement;
+    new(): SVGStopElement;
+};
+
+interface SVGStringList {
+    readonly numberOfItems: number;
+    appendItem(newItem: string): string;
+    clear(): void;
+    getItem(index: number): string;
+    initialize(newItem: string): string;
+    insertItemBefore(newItem: string, index: number): string;
+    removeItem(index: number): string;
+    replaceItem(newItem: string, index: number): string;
+}
+
+declare var SVGStringList: {
+    prototype: SVGStringList;
+    new(): SVGStringList;
+};
+
+interface SVGStyleElement extends SVGElement {
+    disabled: boolean;
+    media: string;
+    title: string;
+    type: string;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGStyleElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGStyleElement: {
+    prototype: SVGStyleElement;
+    new(): SVGStyleElement;
+};
+
+interface SVGSVGElementEventMap extends SVGElementEventMap {
+    "SVGAbort": Event;
+    "SVGError": Event;
+    "resize": UIEvent;
+    "scroll": UIEvent;
+    "SVGUnload": Event;
+    "SVGZoom": SVGZoomEvent;
+}
+
+interface SVGSVGElement extends SVGGraphicsElement, DocumentEvent, SVGFitToViewBox, SVGZoomAndPan {
+    contentScriptType: string;
+    contentStyleType: string;
+    currentScale: number;
+    readonly currentTranslate: SVGPoint;
+    readonly height: SVGAnimatedLength;
+    onabort: (this: SVGSVGElement, ev: Event) => any;
+    onerror: (this: SVGSVGElement, ev: Event) => any;
+    onresize: (this: SVGSVGElement, ev: UIEvent) => any;
+    onscroll: (this: SVGSVGElement, ev: UIEvent) => any;
+    onunload: (this: SVGSVGElement, ev: Event) => any;
+    onzoom: (this: SVGSVGElement, ev: SVGZoomEvent) => any;
+    readonly pixelUnitToMillimeterX: number;
+    readonly pixelUnitToMillimeterY: number;
+    readonly screenPixelToMillimeterX: number;
+    readonly screenPixelToMillimeterY: number;
+    readonly viewport: SVGRect;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+    checkEnclosure(element: SVGElement, rect: SVGRect): boolean;
+    checkIntersection(element: SVGElement, rect: SVGRect): boolean;
+    createSVGAngle(): SVGAngle;
+    createSVGLength(): SVGLength;
+    createSVGMatrix(): SVGMatrix;
+    createSVGNumber(): SVGNumber;
+    createSVGPoint(): SVGPoint;
+    createSVGRect(): SVGRect;
+    createSVGTransform(): SVGTransform;
+    createSVGTransformFromMatrix(matrix: SVGMatrix): SVGTransform;
+    deselectAll(): void;
+    forceRedraw(): void;
+    getComputedStyle(elt: Element, pseudoElt?: string): CSSStyleDeclaration;
+    getCurrentTime(): number;
+    getElementById(elementId: string): Element;
+    getEnclosureList(rect: SVGRect, referenceElement: SVGElement): NodeListOf<SVGCircleElement | SVGEllipseElement | SVGImageElement | SVGLineElement | SVGPathElement | SVGPolygonElement | SVGPolylineElement | SVGRectElement | SVGTextElement | SVGUseElement>;
+    getIntersectionList(rect: SVGRect, referenceElement: SVGElement): NodeListOf<SVGCircleElement | SVGEllipseElement | SVGImageElement | SVGLineElement | SVGPathElement | SVGPolygonElement | SVGPolylineElement | SVGRectElement | SVGTextElement | SVGUseElement>;
+    pauseAnimations(): void;
+    setCurrentTime(seconds: number): void;
+    suspendRedraw(maxWaitMilliseconds: number): number;
+    unpauseAnimations(): void;
+    unsuspendRedraw(suspendHandleID: number): void;
+    unsuspendRedrawAll(): void;
+    addEventListener<K extends keyof SVGSVGElementEventMap>(type: K, listener: (this: SVGSVGElement, ev: SVGSVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGSVGElement: {
+    prototype: SVGSVGElement;
+    new(): SVGSVGElement;
+};
+
+interface SVGSwitchElement extends SVGGraphicsElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGSwitchElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGSwitchElement: {
+    prototype: SVGSwitchElement;
+    new(): SVGSwitchElement;
+};
+
+interface SVGSymbolElement extends SVGElement, SVGFitToViewBox {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGSymbolElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGSymbolElement: {
+    prototype: SVGSymbolElement;
+    new(): SVGSymbolElement;
+};
+
+interface SVGTextContentElement extends SVGGraphicsElement {
+    readonly lengthAdjust: SVGAnimatedEnumeration;
+    readonly textLength: SVGAnimatedLength;
+    getCharNumAtPosition(point: SVGPoint): number;
+    getComputedTextLength(): number;
+    getEndPositionOfChar(charnum: number): SVGPoint;
+    getExtentOfChar(charnum: number): SVGRect;
+    getNumberOfChars(): number;
+    getRotationOfChar(charnum: number): number;
+    getStartPositionOfChar(charnum: number): SVGPoint;
+    getSubStringLength(charnum: number, nchars: number): number;
+    selectSubString(charnum: number, nchars: number): void;
+    readonly LENGTHADJUST_SPACING: number;
+    readonly LENGTHADJUST_SPACINGANDGLYPHS: number;
+    readonly LENGTHADJUST_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGTextContentElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGTextContentElement: {
+    prototype: SVGTextContentElement;
+    new(): SVGTextContentElement;
+    readonly LENGTHADJUST_SPACING: number;
+    readonly LENGTHADJUST_SPACINGANDGLYPHS: number;
+    readonly LENGTHADJUST_UNKNOWN: number;
+};
+
+interface SVGTextElement extends SVGTextPositioningElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGTextElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGTextElement: {
+    prototype: SVGTextElement;
+    new(): SVGTextElement;
+};
+
+interface SVGTextPathElement extends SVGTextContentElement, SVGURIReference {
+    readonly method: SVGAnimatedEnumeration;
+    readonly spacing: SVGAnimatedEnumeration;
+    readonly startOffset: SVGAnimatedLength;
+    readonly TEXTPATH_METHODTYPE_ALIGN: number;
+    readonly TEXTPATH_METHODTYPE_STRETCH: number;
+    readonly TEXTPATH_METHODTYPE_UNKNOWN: number;
+    readonly TEXTPATH_SPACINGTYPE_AUTO: number;
+    readonly TEXTPATH_SPACINGTYPE_EXACT: number;
+    readonly TEXTPATH_SPACINGTYPE_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGTextPathElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGTextPathElement: {
+    prototype: SVGTextPathElement;
+    new(): SVGTextPathElement;
+    readonly TEXTPATH_METHODTYPE_ALIGN: number;
+    readonly TEXTPATH_METHODTYPE_STRETCH: number;
+    readonly TEXTPATH_METHODTYPE_UNKNOWN: number;
+    readonly TEXTPATH_SPACINGTYPE_AUTO: number;
+    readonly TEXTPATH_SPACINGTYPE_EXACT: number;
+    readonly TEXTPATH_SPACINGTYPE_UNKNOWN: number;
+};
+
+interface SVGTextPositioningElement extends SVGTextContentElement {
+    readonly dx: SVGAnimatedLengthList;
+    readonly dy: SVGAnimatedLengthList;
+    readonly rotate: SVGAnimatedNumberList;
+    readonly x: SVGAnimatedLengthList;
+    readonly y: SVGAnimatedLengthList;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGTextPositioningElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGTextPositioningElement: {
+    prototype: SVGTextPositioningElement;
+    new(): SVGTextPositioningElement;
+};
+
+interface SVGTitleElement extends SVGElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGTitleElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGTitleElement: {
+    prototype: SVGTitleElement;
+    new(): SVGTitleElement;
+};
+
+interface SVGTransform {
+    readonly angle: number;
+    readonly matrix: SVGMatrix;
+    readonly type: number;
+    setMatrix(matrix: SVGMatrix): void;
+    setRotate(angle: number, cx: number, cy: number): void;
+    setScale(sx: number, sy: number): void;
+    setSkewX(angle: number): void;
+    setSkewY(angle: number): void;
+    setTranslate(tx: number, ty: number): void;
+    readonly SVG_TRANSFORM_MATRIX: number;
+    readonly SVG_TRANSFORM_ROTATE: number;
+    readonly SVG_TRANSFORM_SCALE: number;
+    readonly SVG_TRANSFORM_SKEWX: number;
+    readonly SVG_TRANSFORM_SKEWY: number;
+    readonly SVG_TRANSFORM_TRANSLATE: number;
+    readonly SVG_TRANSFORM_UNKNOWN: number;
+}
+
+declare var SVGTransform: {
+    prototype: SVGTransform;
+    new(): SVGTransform;
+    readonly SVG_TRANSFORM_MATRIX: number;
+    readonly SVG_TRANSFORM_ROTATE: number;
+    readonly SVG_TRANSFORM_SCALE: number;
+    readonly SVG_TRANSFORM_SKEWX: number;
+    readonly SVG_TRANSFORM_SKEWY: number;
+    readonly SVG_TRANSFORM_TRANSLATE: number;
+    readonly SVG_TRANSFORM_UNKNOWN: number;
+};
+
+interface SVGTransformList {
+    readonly numberOfItems: number;
+    appendItem(newItem: SVGTransform): SVGTransform;
+    clear(): void;
+    consolidate(): SVGTransform;
+    createSVGTransformFromMatrix(matrix: SVGMatrix): SVGTransform;
+    getItem(index: number): SVGTransform;
+    initialize(newItem: SVGTransform): SVGTransform;
+    insertItemBefore(newItem: SVGTransform, index: number): SVGTransform;
+    removeItem(index: number): SVGTransform;
+    replaceItem(newItem: SVGTransform, index: number): SVGTransform;
+}
+
+declare var SVGTransformList: {
+    prototype: SVGTransformList;
+    new(): SVGTransformList;
+};
+
+interface SVGTSpanElement extends SVGTextPositioningElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGTSpanElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGTSpanElement: {
+    prototype: SVGTSpanElement;
+    new(): SVGTSpanElement;
+};
+
+interface SVGUnitTypes {
+    readonly SVG_UNIT_TYPE_OBJECTBOUNDINGBOX: number;
+    readonly SVG_UNIT_TYPE_UNKNOWN: number;
+    readonly SVG_UNIT_TYPE_USERSPACEONUSE: number;
+}
+declare var SVGUnitTypes: SVGUnitTypes;
+
+interface SVGUseElement extends SVGGraphicsElement, SVGURIReference {
+    readonly animatedInstanceRoot: SVGElementInstance;
+    readonly height: SVGAnimatedLength;
+    readonly instanceRoot: SVGElementInstance;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGUseElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGUseElement: {
+    prototype: SVGUseElement;
+    new(): SVGUseElement;
+};
+
+interface SVGViewElement extends SVGElement, SVGZoomAndPan, SVGFitToViewBox {
+    readonly viewTarget: SVGStringList;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGViewElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGViewElement: {
+    prototype: SVGViewElement;
+    new(): SVGViewElement;
+};
+
+interface SVGZoomAndPan {
+    readonly zoomAndPan: number;
+}
+
+declare var SVGZoomAndPan: {
+    readonly SVG_ZOOMANDPAN_DISABLE: number;
+    readonly SVG_ZOOMANDPAN_MAGNIFY: number;
+    readonly SVG_ZOOMANDPAN_UNKNOWN: number;
+};
+
+interface SVGZoomEvent extends UIEvent {
+    readonly newScale: number;
+    readonly newTranslate: SVGPoint;
+    readonly previousScale: number;
+    readonly previousTranslate: SVGPoint;
+    readonly zoomRectScreen: SVGRect;
+}
+
+declare var SVGZoomEvent: {
+    prototype: SVGZoomEvent;
+    new(): SVGZoomEvent;
+};
+
+interface SyncManager {
+    getTags(): any;
+    register(tag: string): Promise<void>;
+}
+
+declare var SyncManager: {
+    prototype: SyncManager;
+    new(): SyncManager;
+};
+
+interface Text extends CharacterData {
+    readonly wholeText: string;
+    readonly assignedSlot: HTMLSlotElement | null;
+    splitText(offset: number): Text;
+}
+
+declare var Text: {
+    prototype: Text;
+    new(data?: string): Text;
+};
+
+interface TextEvent extends UIEvent {
+    readonly data: string;
+    readonly inputMethod: number;
+    readonly locale: string;
+    initTextEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, dataArg: string, inputMethod: number, locale: string): void;
+    readonly DOM_INPUT_METHOD_DROP: number;
+    readonly DOM_INPUT_METHOD_HANDWRITING: number;
+    readonly DOM_INPUT_METHOD_IME: number;
+    readonly DOM_INPUT_METHOD_KEYBOARD: number;
+    readonly DOM_INPUT_METHOD_MULTIMODAL: number;
+    readonly DOM_INPUT_METHOD_OPTION: number;
+    readonly DOM_INPUT_METHOD_PASTE: number;
+    readonly DOM_INPUT_METHOD_SCRIPT: number;
+    readonly DOM_INPUT_METHOD_UNKNOWN: number;
+    readonly DOM_INPUT_METHOD_VOICE: number;
+}
+
+declare var TextEvent: {
+    prototype: TextEvent;
+    new(): TextEvent;
+    readonly DOM_INPUT_METHOD_DROP: number;
+    readonly DOM_INPUT_METHOD_HANDWRITING: number;
+    readonly DOM_INPUT_METHOD_IME: number;
+    readonly DOM_INPUT_METHOD_KEYBOARD: number;
+    readonly DOM_INPUT_METHOD_MULTIMODAL: number;
+    readonly DOM_INPUT_METHOD_OPTION: number;
+    readonly DOM_INPUT_METHOD_PASTE: number;
+    readonly DOM_INPUT_METHOD_SCRIPT: number;
+    readonly DOM_INPUT_METHOD_UNKNOWN: number;
+    readonly DOM_INPUT_METHOD_VOICE: number;
+};
+
+interface TextMetrics {
+    readonly width: number;
+}
+
+declare var TextMetrics: {
+    prototype: TextMetrics;
+    new(): TextMetrics;
+};
+
+interface TextTrackEventMap {
+    "cuechange": Event;
+    "error": Event;
+    "load": Event;
+}
+
+interface TextTrack extends EventTarget {
+    readonly activeCues: TextTrackCueList;
+    readonly cues: TextTrackCueList;
+    readonly inBandMetadataTrackDispatchType: string;
+    readonly kind: string;
+    readonly label: string;
+    readonly language: string;
+    mode: any;
+    oncuechange: (this: TextTrack, ev: Event) => any;
+    onerror: (this: TextTrack, ev: Event) => any;
+    onload: (this: TextTrack, ev: Event) => any;
+    readonly readyState: number;
+    addCue(cue: TextTrackCue): void;
+    removeCue(cue: TextTrackCue): void;
+    readonly DISABLED: number;
+    readonly ERROR: number;
+    readonly HIDDEN: number;
+    readonly LOADED: number;
+    readonly LOADING: number;
+    readonly NONE: number;
+    readonly SHOWING: number;
+    addEventListener<K extends keyof TextTrackEventMap>(type: K, listener: (this: TextTrack, ev: TextTrackEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var TextTrack: {
+    prototype: TextTrack;
+    new(): TextTrack;
+    readonly DISABLED: number;
+    readonly ERROR: number;
+    readonly HIDDEN: number;
+    readonly LOADED: number;
+    readonly LOADING: number;
+    readonly NONE: number;
+    readonly SHOWING: number;
+};
+
+interface TextTrackCueEventMap {
+    "enter": Event;
+    "exit": Event;
+}
+
+interface TextTrackCue extends EventTarget {
+    endTime: number;
+    id: string;
+    onenter: (this: TextTrackCue, ev: Event) => any;
+    onexit: (this: TextTrackCue, ev: Event) => any;
+    pauseOnExit: boolean;
+    startTime: number;
+    text: string;
+    readonly track: TextTrack;
+    getCueAsHTML(): DocumentFragment;
+    addEventListener<K extends keyof TextTrackCueEventMap>(type: K, listener: (this: TextTrackCue, ev: TextTrackCueEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var TextTrackCue: {
+    prototype: TextTrackCue;
+    new(startTime: number, endTime: number, text: string): TextTrackCue;
+};
+
+interface TextTrackCueList {
+    readonly length: number;
+    getCueById(id: string): TextTrackCue;
+    item(index: number): TextTrackCue;
+    [index: number]: TextTrackCue;
+}
+
+declare var TextTrackCueList: {
+    prototype: TextTrackCueList;
+    new(): TextTrackCueList;
+};
+
+interface TextTrackListEventMap {
+    "addtrack": TrackEvent;
+}
+
+interface TextTrackList extends EventTarget {
+    readonly length: number;
+    onaddtrack: ((this: TextTrackList, ev: TrackEvent) => any) | null;
+    item(index: number): TextTrack;
+    addEventListener<K extends keyof TextTrackListEventMap>(type: K, listener: (this: TextTrackList, ev: TextTrackListEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+    [index: number]: TextTrack;
+}
+
+declare var TextTrackList: {
+    prototype: TextTrackList;
+    new(): TextTrackList;
+};
+
+interface TimeRanges {
+    readonly length: number;
+    end(index: number): number;
+    start(index: number): number;
+}
+
+declare var TimeRanges: {
+    prototype: TimeRanges;
+    new(): TimeRanges;
+};
+
+interface Touch {
+    readonly clientX: number;
+    readonly clientY: number;
+    readonly identifier: number;
+    readonly pageX: number;
+    readonly pageY: number;
+    readonly screenX: number;
+    readonly screenY: number;
+    readonly target: EventTarget;
+}
+
+declare var Touch: {
+    prototype: Touch;
+    new(): Touch;
+};
+
+interface TouchEvent extends UIEvent {
+    readonly altKey: boolean;
+    readonly changedTouches: TouchList;
+    readonly charCode: number;
+    readonly ctrlKey: boolean;
+    readonly keyCode: number;
+    readonly metaKey: boolean;
+    readonly shiftKey: boolean;
+    readonly targetTouches: TouchList;
+    readonly touches: TouchList;
+    readonly which: number;
+}
+
+declare var TouchEvent: {
+    prototype: TouchEvent;
+    new(type: string, touchEventInit?: TouchEventInit): TouchEvent;
+};
+
+interface TouchList {
+    readonly length: number;
+    item(index: number): Touch | null;
+    [index: number]: Touch;
+}
+
+declare var TouchList: {
+    prototype: TouchList;
+    new(): TouchList;
+};
+
+interface TrackEvent extends Event {
+    readonly track: VideoTrack | AudioTrack | TextTrack | null;
+}
+
+declare var TrackEvent: {
+    prototype: TrackEvent;
+    new(typeArg: string, eventInitDict?: TrackEventInit): TrackEvent;
+};
+
+interface TransitionEvent extends Event {
+    readonly elapsedTime: number;
+    readonly propertyName: string;
+    initTransitionEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, propertyNameArg: string, elapsedTimeArg: number): void;
+}
+
+declare var TransitionEvent: {
+    prototype: TransitionEvent;
+    new(typeArg: string, eventInitDict?: TransitionEventInit): TransitionEvent;
+};
+
+interface TreeWalker {
+    currentNode: Node;
+    readonly expandEntityReferences: boolean;
+    readonly filter: NodeFilter;
+    readonly root: Node;
+    readonly whatToShow: number;
+    firstChild(): Node;
+    lastChild(): Node;
+    nextNode(): Node;
+    nextSibling(): Node;
+    parentNode(): Node;
+    previousNode(): Node;
+    previousSibling(): Node;
+}
+
+declare var TreeWalker: {
+    prototype: TreeWalker;
+    new(): TreeWalker;
+};
+
+interface UIEvent extends Event {
+    readonly detail: number;
+    readonly view: Window;
+    initUIEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number): void;
+}
+
+declare var UIEvent: {
+    prototype: UIEvent;
+    new(typeArg: string, eventInitDict?: UIEventInit): UIEvent;
+};
+
+interface UnviewableContentIdentifiedEvent extends NavigationEventWithReferrer {
+    readonly mediaType: string;
+}
+
+declare var UnviewableContentIdentifiedEvent: {
+    prototype: UnviewableContentIdentifiedEvent;
+    new(): UnviewableContentIdentifiedEvent;
+};
+
+interface URL {
+    hash: string;
+    host: string;
+    hostname: string;
+    href: string;
+    readonly origin: string;
+    password: string;
+    pathname: string;
+    port: string;
+    protocol: string;
+    search: string;
+    username: string;
+    readonly searchParams: URLSearchParams;
+    toString(): string;
+}
+
+declare var URL: {
+    prototype: URL;
+    new(url: string, base?: string): URL;
+    createObjectURL(object: any, options?: ObjectURLOptions): string;
+    revokeObjectURL(url: string): void;
+};
+
+interface ValidityState {
+    readonly badInput: boolean;
+    readonly customError: boolean;
+    readonly patternMismatch: boolean;
+    readonly rangeOverflow: boolean;
+    readonly rangeUnderflow: boolean;
+    readonly stepMismatch: boolean;
+    readonly tooLong: boolean;
+    readonly typeMismatch: boolean;
+    readonly valid: boolean;
+    readonly valueMissing: boolean;
+}
+
+declare var ValidityState: {
+    prototype: ValidityState;
+    new(): ValidityState;
+};
+
+interface VideoPlaybackQuality {
+    readonly corruptedVideoFrames: number;
+    readonly creationTime: number;
+    readonly droppedVideoFrames: number;
+    readonly totalFrameDelay: number;
+    readonly totalVideoFrames: number;
+}
+
+declare var VideoPlaybackQuality: {
+    prototype: VideoPlaybackQuality;
+    new(): VideoPlaybackQuality;
+};
+
+interface VideoTrack {
+    readonly id: string;
+    kind: string;
+    readonly label: string;
+    language: string;
+    selected: boolean;
+    readonly sourceBuffer: SourceBuffer;
+}
+
+declare var VideoTrack: {
+    prototype: VideoTrack;
+    new(): VideoTrack;
+};
+
+interface VideoTrackListEventMap {
+    "addtrack": TrackEvent;
+    "change": Event;
+    "removetrack": TrackEvent;
+}
+
+interface VideoTrackList extends EventTarget {
+    readonly length: number;
+    onaddtrack: (this: VideoTrackList, ev: TrackEvent) => any;
+    onchange: (this: VideoTrackList, ev: Event) => any;
+    onremovetrack: (this: VideoTrackList, ev: TrackEvent) => any;
+    readonly selectedIndex: number;
+    getTrackById(id: string): VideoTrack | null;
+    item(index: number): VideoTrack;
+    addEventListener<K extends keyof VideoTrackListEventMap>(type: K, listener: (this: VideoTrackList, ev: VideoTrackListEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+    [index: number]: VideoTrack;
+}
+
+declare var VideoTrackList: {
+    prototype: VideoTrackList;
+    new(): VideoTrackList;
+};
+
+interface WaveShaperNode extends AudioNode {
+    curve: Float32Array | null;
+    oversample: OverSampleType;
+}
+
+declare var WaveShaperNode: {
+    prototype: WaveShaperNode;
+    new(): WaveShaperNode;
+};
+
+interface WebAuthentication {
+    getAssertion(assertionChallenge: any, options?: AssertionOptions): Promise<WebAuthnAssertion>;
+    makeCredential(accountInformation: Account, cryptoParameters: ScopedCredentialParameters[], attestationChallenge: any, options?: ScopedCredentialOptions): Promise<ScopedCredentialInfo>;
+}
+
+declare var WebAuthentication: {
+    prototype: WebAuthentication;
+    new(): WebAuthentication;
+};
+
+interface WebAuthnAssertion {
+    readonly authenticatorData: ArrayBuffer;
+    readonly clientData: ArrayBuffer;
+    readonly credential: ScopedCredential;
+    readonly signature: ArrayBuffer;
+}
+
+declare var WebAuthnAssertion: {
+    prototype: WebAuthnAssertion;
+    new(): WebAuthnAssertion;
+};
+
+interface WEBGL_compressed_texture_s3tc {
+    readonly COMPRESSED_RGB_S3TC_DXT1_EXT: number;
+    readonly COMPRESSED_RGBA_S3TC_DXT1_EXT: number;
+    readonly COMPRESSED_RGBA_S3TC_DXT3_EXT: number;
+    readonly COMPRESSED_RGBA_S3TC_DXT5_EXT: number;
+}
+
+declare var WEBGL_compressed_texture_s3tc: {
+    prototype: WEBGL_compressed_texture_s3tc;
+    new(): WEBGL_compressed_texture_s3tc;
+    readonly COMPRESSED_RGB_S3TC_DXT1_EXT: number;
+    readonly COMPRESSED_RGBA_S3TC_DXT1_EXT: number;
+    readonly COMPRESSED_RGBA_S3TC_DXT3_EXT: number;
+    readonly COMPRESSED_RGBA_S3TC_DXT5_EXT: number;
+};
+
+interface WEBGL_debug_renderer_info {
+    readonly UNMASKED_RENDERER_WEBGL: number;
+    readonly UNMASKED_VENDOR_WEBGL: number;
+}
+
+declare var WEBGL_debug_renderer_info: {
+    prototype: WEBGL_debug_renderer_info;
+    new(): WEBGL_debug_renderer_info;
+    readonly UNMASKED_RENDERER_WEBGL: number;
+    readonly UNMASKED_VENDOR_WEBGL: number;
+};
+
+interface WEBGL_depth_texture {
+    readonly UNSIGNED_INT_24_8_WEBGL: number;
+}
+
+declare var WEBGL_depth_texture: {
+    prototype: WEBGL_depth_texture;
+    new(): WEBGL_depth_texture;
+    readonly UNSIGNED_INT_24_8_WEBGL: number;
+};
+
+interface WebGLActiveInfo {
+    readonly name: string;
+    readonly size: number;
+    readonly type: number;
+}
+
+declare var WebGLActiveInfo: {
+    prototype: WebGLActiveInfo;
+    new(): WebGLActiveInfo;
+};
+
+interface WebGLBuffer extends WebGLObject {
+}
+
+declare var WebGLBuffer: {
+    prototype: WebGLBuffer;
+    new(): WebGLBuffer;
+};
+
+interface WebGLContextEvent extends Event {
+    readonly statusMessage: string;
+}
+
+declare var WebGLContextEvent: {
+    prototype: WebGLContextEvent;
+    new(typeArg: string, eventInitDict?: WebGLContextEventInit): WebGLContextEvent;
+};
+
+interface WebGLFramebuffer extends WebGLObject {
+}
+
+declare var WebGLFramebuffer: {
+    prototype: WebGLFramebuffer;
+    new(): WebGLFramebuffer;
+};
+
+interface WebGLObject {
+}
+
+declare var WebGLObject: {
+    prototype: WebGLObject;
+    new(): WebGLObject;
+};
+
+interface WebGLProgram extends WebGLObject {
+}
+
+declare var WebGLProgram: {
+    prototype: WebGLProgram;
+    new(): WebGLProgram;
+};
+
+interface WebGLRenderbuffer extends WebGLObject {
+}
+
+declare var WebGLRenderbuffer: {
+    prototype: WebGLRenderbuffer;
+    new(): WebGLRenderbuffer;
+};
+
+interface WebGLRenderingContext {
+    readonly canvas: HTMLCanvasElement;
+    readonly drawingBufferHeight: number;
+    readonly drawingBufferWidth: number;
+    activeTexture(texture: number): void;
+    attachShader(program: WebGLProgram | null, shader: WebGLShader | null): void;
+    bindAttribLocation(program: WebGLProgram | null, index: number, name: string): void;
+    bindBuffer(target: number, buffer: WebGLBuffer | null): void;
+    bindFramebuffer(target: number, framebuffer: WebGLFramebuffer | null): void;
+    bindRenderbuffer(target: number, renderbuffer: WebGLRenderbuffer | null): void;
+    bindTexture(target: number, texture: WebGLTexture | null): void;
+    blendColor(red: number, green: number, blue: number, alpha: number): void;
+    blendEquation(mode: number): void;
+    blendEquationSeparate(modeRGB: number, modeAlpha: number): void;
+    blendFunc(sfactor: number, dfactor: number): void;
+    blendFuncSeparate(srcRGB: number, dstRGB: number, srcAlpha: number, dstAlpha: number): void;
+    bufferData(target: number, size: number | ArrayBufferView | ArrayBuffer, usage: number): void;
+    bufferSubData(target: number, offset: number, data: ArrayBufferView | ArrayBuffer): void;
+    checkFramebufferStatus(target: number): number;
+    clear(mask: number): void;
+    clearColor(red: number, green: number, blue: number, alpha: number): void;
+    clearDepth(depth: number): void;
+    clearStencil(s: number): void;
+    colorMask(red: boolean, green: boolean, blue: boolean, alpha: boolean): void;
+    compileShader(shader: WebGLShader | null): void;
+    compressedTexImage2D(target: number, level: number, internalformat: number, width: number, height: number, border: number, data: ArrayBufferView): void;
+    compressedTexSubImage2D(target: number, level: number, xoffset: number, yoffset: number, width: number, height: number, format: number, data: ArrayBufferView): void;
+    copyTexImage2D(target: number, level: number, internalformat: number, x: number, y: number, width: number, height: number, border: number): void;
+    copyTexSubImage2D(target: number, level: number, xoffset: number, yoffset: number, x: number, y: number, width: number, height: number): void;
+    createBuffer(): WebGLBuffer | null;
+    createFramebuffer(): WebGLFramebuffer | null;
+    createProgram(): WebGLProgram | null;
+    createRenderbuffer(): WebGLRenderbuffer | null;
+    createShader(type: number): WebGLShader | null;
+    createTexture(): WebGLTexture | null;
+    cullFace(mode: number): void;
+    deleteBuffer(buffer: WebGLBuffer | null): void;
+    deleteFramebuffer(framebuffer: WebGLFramebuffer | null): void;
+    deleteProgram(program: WebGLProgram | null): void;
+    deleteRenderbuffer(renderbuffer: WebGLRenderbuffer | null): void;
+    deleteShader(shader: WebGLShader | null): void;
+    deleteTexture(texture: WebGLTexture | null): void;
+    depthFunc(func: number): void;
+    depthMask(flag: boolean): void;
+    depthRange(zNear: number, zFar: number): void;
+    detachShader(program: WebGLProgram | null, shader: WebGLShader | null): void;
+    disable(cap: number): void;
+    disableVertexAttribArray(index: number): void;
+    drawArrays(mode: number, first: number, count: number): void;
+    drawElements(mode: number, count: number, type: number, offset: number): void;
+    enable(cap: number): void;
+    enableVertexAttribArray(index: number): void;
+    finish(): void;
+    flush(): void;
+    framebufferRenderbuffer(target: number, attachment: number, renderbuffertarget: number, renderbuffer: WebGLRenderbuffer | null): void;
+    framebufferTexture2D(target: number, attachment: number, textarget: number, texture: WebGLTexture | null, level: number): void;
+    frontFace(mode: number): void;
+    generateMipmap(target: number): void;
+    getActiveAttrib(program: WebGLProgram | null, index: number): WebGLActiveInfo | null;
+    getActiveUniform(program: WebGLProgram | null, index: number): WebGLActiveInfo | null;
+    getAttachedShaders(program: WebGLProgram | null): WebGLShader[] | null;
+    getAttribLocation(program: WebGLProgram | null, name: string): number;
+    getBufferParameter(target: number, pname: number): any;
+    getContextAttributes(): WebGLContextAttributes;
+    getError(): number;
+    getExtension(name: string): any;
+    getFramebufferAttachmentParameter(target: number, attachment: number, pname: number): any;
+    getParameter(pname: number): any;
+    getProgramInfoLog(program: WebGLProgram | null): string | null;
+    getProgramParameter(program: WebGLProgram | null, pname: number): any;
+    getRenderbufferParameter(target: number, pname: number): any;
+    getShaderInfoLog(shader: WebGLShader | null): string | null;
+    getShaderParameter(shader: WebGLShader | null, pname: number): any;
+    getShaderPrecisionFormat(shadertype: number, precisiontype: number): WebGLShaderPrecisionFormat | null;
+    getShaderSource(shader: WebGLShader | null): string | null;
+    getSupportedExtensions(): string[] | null;
+    getTexParameter(target: number, pname: number): any;
+    getUniform(program: WebGLProgram | null, location: WebGLUniformLocation | null): any;
+    getUniformLocation(program: WebGLProgram | null, name: string): WebGLUniformLocation | null;
+    getVertexAttrib(index: number, pname: number): any;
+    getVertexAttribOffset(index: number, pname: number): number;
+    hint(target: number, mode: number): void;
+    isBuffer(buffer: WebGLBuffer | null): boolean;
+    isContextLost(): boolean;
+    isEnabled(cap: number): boolean;
+    isFramebuffer(framebuffer: WebGLFramebuffer | null): boolean;
+    isProgram(program: WebGLProgram | null): boolean;
+    isRenderbuffer(renderbuffer: WebGLRenderbuffer | null): boolean;
+    isShader(shader: WebGLShader | null): boolean;
+    isTexture(texture: WebGLTexture | null): boolean;
+    lineWidth(width: number): void;
+    linkProgram(program: WebGLProgram | null): void;
+    pixelStorei(pname: number, param: number | boolean): void;
+    polygonOffset(factor: number, units: number): void;
+    readPixels(x: number, y: number, width: number, height: number, format: number, type: number, pixels: ArrayBufferView | null): void;
+    renderbufferStorage(target: number, internalformat: number, width: number, height: number): void;
+    sampleCoverage(value: number, invert: boolean): void;
+    scissor(x: number, y: number, width: number, height: number): void;
+    shaderSource(shader: WebGLShader | null, source: string): void;
+    stencilFunc(func: number, ref: number, mask: number): void;
+    stencilFuncSeparate(face: number, func: number, ref: number, mask: number): void;
+    stencilMask(mask: number): void;
+    stencilMaskSeparate(face: number, mask: number): void;
+    stencilOp(fail: number, zfail: number, zpass: number): void;
+    stencilOpSeparate(face: number, fail: number, zfail: number, zpass: number): void;
+    texImage2D(target: number, level: number, internalformat: number, width: number, height: number, border: number, format: number, type: number, pixels: ArrayBufferView | null): void;
+    texImage2D(target: number, level: number, internalformat: number, format: number, type: number, pixels: ImageBitmap | ImageData | HTMLVideoElement | HTMLImageElement | HTMLCanvasElement): void;
+    texParameterf(target: number, pname: number, param: number): void;
+    texParameteri(target: number, pname: number, param: number): void;
+    texSubImage2D(target: number, level: number, xoffset: number, yoffset: number, width: number, height: number, format: number, type: number, pixels: ArrayBufferView | null): void;
+    texSubImage2D(target: number, level: number, xoffset: number, yoffset: number, format: number, type: number, pixels: ImageBitmap | ImageData | HTMLVideoElement | HTMLImageElement | HTMLCanvasElement): void;
+    uniform1f(location: WebGLUniformLocation | null, x: number): void;
+    uniform1fv(location: WebGLUniformLocation, v: Float32Array | number[]): void;
+    uniform1i(location: WebGLUniformLocation | null, x: number): void;
+    uniform1iv(location: WebGLUniformLocation, v: Int32Array | number[]): void;
+    uniform2f(location: WebGLUniformLocation | null, x: number, y: number): void;
+    uniform2fv(location: WebGLUniformLocation, v: Float32Array | number[]): void;
+    uniform2i(location: WebGLUniformLocation | null, x: number, y: number): void;
+    uniform2iv(location: WebGLUniformLocation, v: Int32Array | number[]): void;
+    uniform3f(location: WebGLUniformLocation | null, x: number, y: number, z: number): void;
+    uniform3fv(location: WebGLUniformLocation, v: Float32Array | number[]): void;
+    uniform3i(location: WebGLUniformLocation | null, x: number, y: number, z: number): void;
+    uniform3iv(location: WebGLUniformLocation, v: Int32Array | number[]): void;
+    uniform4f(location: WebGLUniformLocation | null, x: number, y: number, z: number, w: number): void;
+    uniform4fv(location: WebGLUniformLocation, v: Float32Array | number[]): void;
+    uniform4i(location: WebGLUniformLocation | null, x: number, y: number, z: number, w: number): void;
+    uniform4iv(location: WebGLUniformLocation, v: Int32Array | number[]): void;
+    uniformMatrix2fv(location: WebGLUniformLocation, transpose: boolean, value: Float32Array | number[]): void;
+    uniformMatrix3fv(location: WebGLUniformLocation, transpose: boolean, value: Float32Array | number[]): void;
+    uniformMatrix4fv(location: WebGLUniformLocation, transpose: boolean, value: Float32Array | number[]): void;
+    useProgram(program: WebGLProgram | null): void;
+    validateProgram(program: WebGLProgram | null): void;
+    vertexAttrib1f(indx: number, x: number): void;
+    vertexAttrib1fv(indx: number, values: Float32Array | number[]): void;
+    vertexAttrib2f(indx: number, x: number, y: number): void;
+    vertexAttrib2fv(indx: number, values: Float32Array | number[]): void;
+    vertexAttrib3f(indx: number, x: number, y: number, z: number): void;
+    vertexAttrib3fv(indx: number, values: Float32Array | number[]): void;
+    vertexAttrib4f(indx: number, x: number, y: number, z: number, w: number): void;
+    vertexAttrib4fv(indx: number, values: Float32Array | number[]): void;
+    vertexAttribPointer(indx: number, size: number, type: number, normalized: boolean, stride: number, offset: number): void;
+    viewport(x: number, y: number, width: number, height: number): void;
+    readonly ACTIVE_ATTRIBUTES: number;
+    readonly ACTIVE_TEXTURE: number;
+    readonly ACTIVE_UNIFORMS: number;
+    readonly ALIASED_LINE_WIDTH_RANGE: number;
+    readonly ALIASED_POINT_SIZE_RANGE: number;
+    readonly ALPHA: number;
+    readonly ALPHA_BITS: number;
+    readonly ALWAYS: number;
+    readonly ARRAY_BUFFER: number;
+    readonly ARRAY_BUFFER_BINDING: number;
+    readonly ATTACHED_SHADERS: number;
+    readonly BACK: number;
+    readonly BLEND: number;
+    readonly BLEND_COLOR: number;
+    readonly BLEND_DST_ALPHA: number;
+    readonly BLEND_DST_RGB: number;
+    readonly BLEND_EQUATION: number;
+    readonly BLEND_EQUATION_ALPHA: number;
+    readonly BLEND_EQUATION_RGB: number;
+    readonly BLEND_SRC_ALPHA: number;
+    readonly BLEND_SRC_RGB: number;
+    readonly BLUE_BITS: number;
+    readonly BOOL: number;
+    readonly BOOL_VEC2: number;
+    readonly BOOL_VEC3: number;
+    readonly BOOL_VEC4: number;
+    readonly BROWSER_DEFAULT_WEBGL: number;
+    readonly BUFFER_SIZE: number;
+    readonly BUFFER_USAGE: number;
+    readonly BYTE: number;
+    readonly CCW: number;
+    readonly CLAMP_TO_EDGE: number;
+    readonly COLOR_ATTACHMENT0: number;
+    readonly COLOR_BUFFER_BIT: number;
+    readonly COLOR_CLEAR_VALUE: number;
+    readonly COLOR_WRITEMASK: number;
+    readonly COMPILE_STATUS: number;
+    readonly COMPRESSED_TEXTURE_FORMATS: number;
+    readonly CONSTANT_ALPHA: number;
+    readonly CONSTANT_COLOR: number;
+    readonly CONTEXT_LOST_WEBGL: number;
+    readonly CULL_FACE: number;
+    readonly CULL_FACE_MODE: number;
+    readonly CURRENT_PROGRAM: number;
+    readonly CURRENT_VERTEX_ATTRIB: number;
+    readonly CW: number;
+    readonly DECR: number;
+    readonly DECR_WRAP: number;
+    readonly DELETE_STATUS: number;
+    readonly DEPTH_ATTACHMENT: number;
+    readonly DEPTH_BITS: number;
+    readonly DEPTH_BUFFER_BIT: number;
+    readonly DEPTH_CLEAR_VALUE: number;
+    readonly DEPTH_COMPONENT: number;
+    readonly DEPTH_COMPONENT16: number;
+    readonly DEPTH_FUNC: number;
+    readonly DEPTH_RANGE: number;
+    readonly DEPTH_STENCIL: number;
+    readonly DEPTH_STENCIL_ATTACHMENT: number;
+    readonly DEPTH_TEST: number;
+    readonly DEPTH_WRITEMASK: number;
+    readonly DITHER: number;
+    readonly DONT_CARE: number;
+    readonly DST_ALPHA: number;
+    readonly DST_COLOR: number;
+    readonly DYNAMIC_DRAW: number;
+    readonly ELEMENT_ARRAY_BUFFER: number;
+    readonly ELEMENT_ARRAY_BUFFER_BINDING: number;
+    readonly EQUAL: number;
+    readonly FASTEST: number;
+    readonly FLOAT: number;
+    readonly FLOAT_MAT2: number;
+    readonly FLOAT_MAT3: number;
+    readonly FLOAT_MAT4: number;
+    readonly FLOAT_VEC2: number;
+    readonly FLOAT_VEC3: number;
+    readonly FLOAT_VEC4: number;
+    readonly FRAGMENT_SHADER: number;
+    readonly FRAMEBUFFER: number;
+    readonly FRAMEBUFFER_ATTACHMENT_OBJECT_NAME: number;
+    readonly FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE: number;
+    readonly FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE: number;
+    readonly FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL: number;
+    readonly FRAMEBUFFER_BINDING: number;
+    readonly FRAMEBUFFER_COMPLETE: number;
+    readonly FRAMEBUFFER_INCOMPLETE_ATTACHMENT: number;
+    readonly FRAMEBUFFER_INCOMPLETE_DIMENSIONS: number;
+    readonly FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT: number;
+    readonly FRAMEBUFFER_UNSUPPORTED: number;
+    readonly FRONT: number;
+    readonly FRONT_AND_BACK: number;
+    readonly FRONT_FACE: number;
+    readonly FUNC_ADD: number;
+    readonly FUNC_REVERSE_SUBTRACT: number;
+    readonly FUNC_SUBTRACT: number;
+    readonly GENERATE_MIPMAP_HINT: number;
+    readonly GEQUAL: number;
+    readonly GREATER: number;
+    readonly GREEN_BITS: number;
+    readonly HIGH_FLOAT: number;
+    readonly HIGH_INT: number;
+    readonly IMPLEMENTATION_COLOR_READ_FORMAT: number;
+    readonly IMPLEMENTATION_COLOR_READ_TYPE: number;
+    readonly INCR: number;
+    readonly INCR_WRAP: number;
+    readonly INT: number;
+    readonly INT_VEC2: number;
+    readonly INT_VEC3: number;
+    readonly INT_VEC4: number;
+    readonly INVALID_ENUM: number;
+    readonly INVALID_FRAMEBUFFER_OPERATION: number;
+    readonly INVALID_OPERATION: number;
+    readonly INVALID_VALUE: number;
+    readonly INVERT: number;
+    readonly KEEP: number;
+    readonly LEQUAL: number;
+    readonly LESS: number;
+    readonly LINE_LOOP: number;
+    readonly LINE_STRIP: number;
+    readonly LINE_WIDTH: number;
+    readonly LINEAR: number;
+    readonly LINEAR_MIPMAP_LINEAR: number;
+    readonly LINEAR_MIPMAP_NEAREST: number;
+    readonly LINES: number;
+    readonly LINK_STATUS: number;
+    readonly LOW_FLOAT: number;
+    readonly LOW_INT: number;
+    readonly LUMINANCE: number;
+    readonly LUMINANCE_ALPHA: number;
+    readonly MAX_COMBINED_TEXTURE_IMAGE_UNITS: number;
+    readonly MAX_CUBE_MAP_TEXTURE_SIZE: number;
+    readonly MAX_FRAGMENT_UNIFORM_VECTORS: number;
+    readonly MAX_RENDERBUFFER_SIZE: number;
+    readonly MAX_TEXTURE_IMAGE_UNITS: number;
+    readonly MAX_TEXTURE_SIZE: number;
+    readonly MAX_VARYING_VECTORS: number;
+    readonly MAX_VERTEX_ATTRIBS: number;
+    readonly MAX_VERTEX_TEXTURE_IMAGE_UNITS: number;
+    readonly MAX_VERTEX_UNIFORM_VECTORS: number;
+    readonly MAX_VIEWPORT_DIMS: number;
+    readonly MEDIUM_FLOAT: number;
+    readonly MEDIUM_INT: number;
+    readonly MIRRORED_REPEAT: number;
+    readonly NEAREST: number;
+    readonly NEAREST_MIPMAP_LINEAR: number;
+    readonly NEAREST_MIPMAP_NEAREST: number;
+    readonly NEVER: number;
+    readonly NICEST: number;
+    readonly NO_ERROR: number;
+    readonly NONE: number;
+    readonly NOTEQUAL: number;
+    readonly ONE: number;
+    readonly ONE_MINUS_CONSTANT_ALPHA: number;
+    readonly ONE_MINUS_CONSTANT_COLOR: number;
+    readonly ONE_MINUS_DST_ALPHA: number;
+    readonly ONE_MINUS_DST_COLOR: number;
+    readonly ONE_MINUS_SRC_ALPHA: number;
+    readonly ONE_MINUS_SRC_COLOR: number;
+    readonly OUT_OF_MEMORY: number;
+    readonly PACK_ALIGNMENT: number;
+    readonly POINTS: number;
+    readonly POLYGON_OFFSET_FACTOR: number;
+    readonly POLYGON_OFFSET_FILL: number;
+    readonly POLYGON_OFFSET_UNITS: number;
+    readonly RED_BITS: number;
+    readonly RENDERBUFFER: number;
+    readonly RENDERBUFFER_ALPHA_SIZE: number;
+    readonly RENDERBUFFER_BINDING: number;
+    readonly RENDERBUFFER_BLUE_SIZE: number;
+    readonly RENDERBUFFER_DEPTH_SIZE: number;
+    readonly RENDERBUFFER_GREEN_SIZE: number;
+    readonly RENDERBUFFER_HEIGHT: number;
+    readonly RENDERBUFFER_INTERNAL_FORMAT: number;
+    readonly RENDERBUFFER_RED_SIZE: number;
+    readonly RENDERBUFFER_STENCIL_SIZE: number;
+    readonly RENDERBUFFER_WIDTH: number;
+    readonly RENDERER: number;
+    readonly REPEAT: number;
+    readonly REPLACE: number;
+    readonly RGB: number;
+    readonly RGB5_A1: number;
+    readonly RGB565: number;
+    readonly RGBA: number;
+    readonly RGBA4: number;
+    readonly SAMPLE_ALPHA_TO_COVERAGE: number;
+    readonly SAMPLE_BUFFERS: number;
+    readonly SAMPLE_COVERAGE: number;
+    readonly SAMPLE_COVERAGE_INVERT: number;
+    readonly SAMPLE_COVERAGE_VALUE: number;
+    readonly SAMPLER_2D: number;
+    readonly SAMPLER_CUBE: number;
+    readonly SAMPLES: number;
+    readonly SCISSOR_BOX: number;
+    readonly SCISSOR_TEST: number;
+    readonly SHADER_TYPE: number;
+    readonly SHADING_LANGUAGE_VERSION: number;
+    readonly SHORT: number;
+    readonly SRC_ALPHA: number;
+    readonly SRC_ALPHA_SATURATE: number;
+    readonly SRC_COLOR: number;
+    readonly STATIC_DRAW: number;
+    readonly STENCIL_ATTACHMENT: number;
+    readonly STENCIL_BACK_FAIL: number;
+    readonly STENCIL_BACK_FUNC: number;
+    readonly STENCIL_BACK_PASS_DEPTH_FAIL: number;
+    readonly STENCIL_BACK_PASS_DEPTH_PASS: number;
+    readonly STENCIL_BACK_REF: number;
+    readonly STENCIL_BACK_VALUE_MASK: number;
+    readonly STENCIL_BACK_WRITEMASK: number;
+    readonly STENCIL_BITS: number;
+    readonly STENCIL_BUFFER_BIT: number;
+    readonly STENCIL_CLEAR_VALUE: number;
+    readonly STENCIL_FAIL: number;
+    readonly STENCIL_FUNC: number;
+    readonly STENCIL_INDEX: number;
+    readonly STENCIL_INDEX8: number;
+    readonly STENCIL_PASS_DEPTH_FAIL: number;
+    readonly STENCIL_PASS_DEPTH_PASS: number;
+    readonly STENCIL_REF: number;
+    readonly STENCIL_TEST: number;
+    readonly STENCIL_VALUE_MASK: number;
+    readonly STENCIL_WRITEMASK: number;
+    readonly STREAM_DRAW: number;
+    readonly SUBPIXEL_BITS: number;
+    readonly TEXTURE: number;
+    readonly TEXTURE_2D: number;
+    readonly TEXTURE_BINDING_2D: number;
+    readonly TEXTURE_BINDING_CUBE_MAP: number;
+    readonly TEXTURE_CUBE_MAP: number;
+    readonly TEXTURE_CUBE_MAP_NEGATIVE_X: number;
+    readonly TEXTURE_CUBE_MAP_NEGATIVE_Y: number;
+    readonly TEXTURE_CUBE_MAP_NEGATIVE_Z: number;
+    readonly TEXTURE_CUBE_MAP_POSITIVE_X: number;
+    readonly TEXTURE_CUBE_MAP_POSITIVE_Y: number;
+    readonly TEXTURE_CUBE_MAP_POSITIVE_Z: number;
+    readonly TEXTURE_MAG_FILTER: number;
+    readonly TEXTURE_MIN_FILTER: number;
+    readonly TEXTURE_WRAP_S: number;
+    readonly TEXTURE_WRAP_T: number;
+    readonly TEXTURE0: number;
+    readonly TEXTURE1: number;
+    readonly TEXTURE10: number;
+    readonly TEXTURE11: number;
+    readonly TEXTURE12: number;
+    readonly TEXTURE13: number;
+    readonly TEXTURE14: number;
+    readonly TEXTURE15: number;
+    readonly TEXTURE16: number;
+    readonly TEXTURE17: number;
+    readonly TEXTURE18: number;
+    readonly TEXTURE19: number;
+    readonly TEXTURE2: number;
+    readonly TEXTURE20: number;
+    readonly TEXTURE21: number;
+    readonly TEXTURE22: number;
+    readonly TEXTURE23: number;
+    readonly TEXTURE24: number;
+    readonly TEXTURE25: number;
+    readonly TEXTURE26: number;
+    readonly TEXTURE27: number;
+    readonly TEXTURE28: number;
+    readonly TEXTURE29: number;
+    readonly TEXTURE3: number;
+    readonly TEXTURE30: number;
+    readonly TEXTURE31: number;
+    readonly TEXTURE4: number;
+    readonly TEXTURE5: number;
+    readonly TEXTURE6: number;
+    readonly TEXTURE7: number;
+    readonly TEXTURE8: number;
+    readonly TEXTURE9: number;
+    readonly TRIANGLE_FAN: number;
+    readonly TRIANGLE_STRIP: number;
+    readonly TRIANGLES: number;
+    readonly UNPACK_ALIGNMENT: number;
+    readonly UNPACK_COLORSPACE_CONVERSION_WEBGL: number;
+    readonly UNPACK_FLIP_Y_WEBGL: number;
+    readonly UNPACK_PREMULTIPLY_ALPHA_WEBGL: number;
+    readonly UNSIGNED_BYTE: number;
+    readonly UNSIGNED_INT: number;
+    readonly UNSIGNED_SHORT: number;
+    readonly UNSIGNED_SHORT_4_4_4_4: number;
+    readonly UNSIGNED_SHORT_5_5_5_1: number;
+    readonly UNSIGNED_SHORT_5_6_5: number;
+    readonly VALIDATE_STATUS: number;
+    readonly VENDOR: number;
+    readonly VERSION: number;
+    readonly VERTEX_ATTRIB_ARRAY_BUFFER_BINDING: number;
+    readonly VERTEX_ATTRIB_ARRAY_ENABLED: number;
+    readonly VERTEX_ATTRIB_ARRAY_NORMALIZED: number;
+    readonly VERTEX_ATTRIB_ARRAY_POINTER: number;
+    readonly VERTEX_ATTRIB_ARRAY_SIZE: number;
+    readonly VERTEX_ATTRIB_ARRAY_STRIDE: number;
+    readonly VERTEX_ATTRIB_ARRAY_TYPE: number;
+    readonly VERTEX_SHADER: number;
+    readonly VIEWPORT: number;
+    readonly ZERO: number;
+}
+
+declare var WebGLRenderingContext: {
+    prototype: WebGLRenderingContext;
+    new(): WebGLRenderingContext;
+    readonly ACTIVE_ATTRIBUTES: number;
+    readonly ACTIVE_TEXTURE: number;
+    readonly ACTIVE_UNIFORMS: number;
+    readonly ALIASED_LINE_WIDTH_RANGE: number;
+    readonly ALIASED_POINT_SIZE_RANGE: number;
+    readonly ALPHA: number;
+    readonly ALPHA_BITS: number;
+    readonly ALWAYS: number;
+    readonly ARRAY_BUFFER: number;
+    readonly ARRAY_BUFFER_BINDING: number;
+    readonly ATTACHED_SHADERS: number;
+    readonly BACK: number;
+    readonly BLEND: number;
+    readonly BLEND_COLOR: number;
+    readonly BLEND_DST_ALPHA: number;
+    readonly BLEND_DST_RGB: number;
+    readonly BLEND_EQUATION: number;
+    readonly BLEND_EQUATION_ALPHA: number;
+    readonly BLEND_EQUATION_RGB: number;
+    readonly BLEND_SRC_ALPHA: number;
+    readonly BLEND_SRC_RGB: number;
+    readonly BLUE_BITS: number;
+    readonly BOOL: number;
+    readonly BOOL_VEC2: number;
+    readonly BOOL_VEC3: number;
+    readonly BOOL_VEC4: number;
+    readonly BROWSER_DEFAULT_WEBGL: number;
+    readonly BUFFER_SIZE: number;
+    readonly BUFFER_USAGE: number;
+    readonly BYTE: number;
+    readonly CCW: number;
+    readonly CLAMP_TO_EDGE: number;
+    readonly COLOR_ATTACHMENT0: number;
+    readonly COLOR_BUFFER_BIT: number;
+    readonly COLOR_CLEAR_VALUE: number;
+    readonly COLOR_WRITEMASK: number;
+    readonly COMPILE_STATUS: number;
+    readonly COMPRESSED_TEXTURE_FORMATS: number;
+    readonly CONSTANT_ALPHA: number;
+    readonly CONSTANT_COLOR: number;
+    readonly CONTEXT_LOST_WEBGL: number;
+    readonly CULL_FACE: number;
+    readonly CULL_FACE_MODE: number;
+    readonly CURRENT_PROGRAM: number;
+    readonly CURRENT_VERTEX_ATTRIB: number;
+    readonly CW: number;
+    readonly DECR: number;
+    readonly DECR_WRAP: number;
+    readonly DELETE_STATUS: number;
+    readonly DEPTH_ATTACHMENT: number;
+    readonly DEPTH_BITS: number;
+    readonly DEPTH_BUFFER_BIT: number;
+    readonly DEPTH_CLEAR_VALUE: number;
+    readonly DEPTH_COMPONENT: number;
+    readonly DEPTH_COMPONENT16: number;
+    readonly DEPTH_FUNC: number;
+    readonly DEPTH_RANGE: number;
+    readonly DEPTH_STENCIL: number;
+    readonly DEPTH_STENCIL_ATTACHMENT: number;
+    readonly DEPTH_TEST: number;
+    readonly DEPTH_WRITEMASK: number;
+    readonly DITHER: number;
+    readonly DONT_CARE: number;
+    readonly DST_ALPHA: number;
+    readonly DST_COLOR: number;
+    readonly DYNAMIC_DRAW: number;
+    readonly ELEMENT_ARRAY_BUFFER: number;
+    readonly ELEMENT_ARRAY_BUFFER_BINDING: number;
+    readonly EQUAL: number;
+    readonly FASTEST: number;
+    readonly FLOAT: number;
+    readonly FLOAT_MAT2: number;
+    readonly FLOAT_MAT3: number;
+    readonly FLOAT_MAT4: number;
+    readonly FLOAT_VEC2: number;
+    readonly FLOAT_VEC3: number;
+    readonly FLOAT_VEC4: number;
+    readonly FRAGMENT_SHADER: number;
+    readonly FRAMEBUFFER: number;
+    readonly FRAMEBUFFER_ATTACHMENT_OBJECT_NAME: number;
+    readonly FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE: number;
+    readonly FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE: number;
+    readonly FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL: number;
+    readonly FRAMEBUFFER_BINDING: number;
+    readonly FRAMEBUFFER_COMPLETE: number;
+    readonly FRAMEBUFFER_INCOMPLETE_ATTACHMENT: number;
+    readonly FRAMEBUFFER_INCOMPLETE_DIMENSIONS: number;
+    readonly FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT: number;
+    readonly FRAMEBUFFER_UNSUPPORTED: number;
+    readonly FRONT: number;
+    readonly FRONT_AND_BACK: number;
+    readonly FRONT_FACE: number;
+    readonly FUNC_ADD: number;
+    readonly FUNC_REVERSE_SUBTRACT: number;
+    readonly FUNC_SUBTRACT: number;
+    readonly GENERATE_MIPMAP_HINT: number;
+    readonly GEQUAL: number;
+    readonly GREATER: number;
+    readonly GREEN_BITS: number;
+    readonly HIGH_FLOAT: number;
+    readonly HIGH_INT: number;
+    readonly IMPLEMENTATION_COLOR_READ_FORMAT: number;
+    readonly IMPLEMENTATION_COLOR_READ_TYPE: number;
+    readonly INCR: number;
+    readonly INCR_WRAP: number;
+    readonly INT: number;
+    readonly INT_VEC2: number;
+    readonly INT_VEC3: number;
+    readonly INT_VEC4: number;
+    readonly INVALID_ENUM: number;
+    readonly INVALID_FRAMEBUFFER_OPERATION: number;
+    readonly INVALID_OPERATION: number;
+    readonly INVALID_VALUE: number;
+    readonly INVERT: number;
+    readonly KEEP: number;
+    readonly LEQUAL: number;
+    readonly LESS: number;
+    readonly LINE_LOOP: number;
+    readonly LINE_STRIP: number;
+    readonly LINE_WIDTH: number;
+    readonly LINEAR: number;
+    readonly LINEAR_MIPMAP_LINEAR: number;
+    readonly LINEAR_MIPMAP_NEAREST: number;
+    readonly LINES: number;
+    readonly LINK_STATUS: number;
+    readonly LOW_FLOAT: number;
+    readonly LOW_INT: number;
+    readonly LUMINANCE: number;
+    readonly LUMINANCE_ALPHA: number;
+    readonly MAX_COMBINED_TEXTURE_IMAGE_UNITS: number;
+    readonly MAX_CUBE_MAP_TEXTURE_SIZE: number;
+    readonly MAX_FRAGMENT_UNIFORM_VECTORS: number;
+    readonly MAX_RENDERBUFFER_SIZE: number;
+    readonly MAX_TEXTURE_IMAGE_UNITS: number;
+    readonly MAX_TEXTURE_SIZE: number;
+    readonly MAX_VARYING_VECTORS: number;
+    readonly MAX_VERTEX_ATTRIBS: number;
+    readonly MAX_VERTEX_TEXTURE_IMAGE_UNITS: number;
+    readonly MAX_VERTEX_UNIFORM_VECTORS: number;
+    readonly MAX_VIEWPORT_DIMS: number;
+    readonly MEDIUM_FLOAT: number;
+    readonly MEDIUM_INT: number;
+    readonly MIRRORED_REPEAT: number;
+    readonly NEAREST: number;
+    readonly NEAREST_MIPMAP_LINEAR: number;
+    readonly NEAREST_MIPMAP_NEAREST: number;
+    readonly NEVER: number;
+    readonly NICEST: number;
+    readonly NO_ERROR: number;
+    readonly NONE: number;
+    readonly NOTEQUAL: number;
+    readonly ONE: number;
+    readonly ONE_MINUS_CONSTANT_ALPHA: number;
+    readonly ONE_MINUS_CONSTANT_COLOR: number;
+    readonly ONE_MINUS_DST_ALPHA: number;
+    readonly ONE_MINUS_DST_COLOR: number;
+    readonly ONE_MINUS_SRC_ALPHA: number;
+    readonly ONE_MINUS_SRC_COLOR: number;
+    readonly OUT_OF_MEMORY: number;
+    readonly PACK_ALIGNMENT: number;
+    readonly POINTS: number;
+    readonly POLYGON_OFFSET_FACTOR: number;
+    readonly POLYGON_OFFSET_FILL: number;
+    readonly POLYGON_OFFSET_UNITS: number;
+    readonly RED_BITS: number;
+    readonly RENDERBUFFER: number;
+    readonly RENDERBUFFER_ALPHA_SIZE: number;
+    readonly RENDERBUFFER_BINDING: number;
+    readonly RENDERBUFFER_BLUE_SIZE: number;
+    readonly RENDERBUFFER_DEPTH_SIZE: number;
+    readonly RENDERBUFFER_GREEN_SIZE: number;
+    readonly RENDERBUFFER_HEIGHT: number;
+    readonly RENDERBUFFER_INTERNAL_FORMAT: number;
+    readonly RENDERBUFFER_RED_SIZE: number;
+    readonly RENDERBUFFER_STENCIL_SIZE: number;
+    readonly RENDERBUFFER_WIDTH: number;
+    readonly RENDERER: number;
+    readonly REPEAT: number;
+    readonly REPLACE: number;
+    readonly RGB: number;
+    readonly RGB5_A1: number;
+    readonly RGB565: number;
+    readonly RGBA: number;
+    readonly RGBA4: number;
+    readonly SAMPLE_ALPHA_TO_COVERAGE: number;
+    readonly SAMPLE_BUFFERS: number;
+    readonly SAMPLE_COVERAGE: number;
+    readonly SAMPLE_COVERAGE_INVERT: number;
+    readonly SAMPLE_COVERAGE_VALUE: number;
+    readonly SAMPLER_2D: number;
+    readonly SAMPLER_CUBE: number;
+    readonly SAMPLES: number;
+    readonly SCISSOR_BOX: number;
+    readonly SCISSOR_TEST: number;
+    readonly SHADER_TYPE: number;
+    readonly SHADING_LANGUAGE_VERSION: number;
+    readonly SHORT: number;
+    readonly SRC_ALPHA: number;
+    readonly SRC_ALPHA_SATURATE: number;
+    readonly SRC_COLOR: number;
+    readonly STATIC_DRAW: number;
+    readonly STENCIL_ATTACHMENT: number;
+    readonly STENCIL_BACK_FAIL: number;
+    readonly STENCIL_BACK_FUNC: number;
+    readonly STENCIL_BACK_PASS_DEPTH_FAIL: number;
+    readonly STENCIL_BACK_PASS_DEPTH_PASS: number;
+    readonly STENCIL_BACK_REF: number;
+    readonly STENCIL_BACK_VALUE_MASK: number;
+    readonly STENCIL_BACK_WRITEMASK: number;
+    readonly STENCIL_BITS: number;
+    readonly STENCIL_BUFFER_BIT: number;
+    readonly STENCIL_CLEAR_VALUE: number;
+    readonly STENCIL_FAIL: number;
+    readonly STENCIL_FUNC: number;
+    readonly STENCIL_INDEX: number;
+    readonly STENCIL_INDEX8: number;
+    readonly STENCIL_PASS_DEPTH_FAIL: number;
+    readonly STENCIL_PASS_DEPTH_PASS: number;
+    readonly STENCIL_REF: number;
+    readonly STENCIL_TEST: number;
+    readonly STENCIL_VALUE_MASK: number;
+    readonly STENCIL_WRITEMASK: number;
+    readonly STREAM_DRAW: number;
+    readonly SUBPIXEL_BITS: number;
+    readonly TEXTURE: number;
+    readonly TEXTURE_2D: number;
+    readonly TEXTURE_BINDING_2D: number;
+    readonly TEXTURE_BINDING_CUBE_MAP: number;
+    readonly TEXTURE_CUBE_MAP: number;
+    readonly TEXTURE_CUBE_MAP_NEGATIVE_X: number;
+    readonly TEXTURE_CUBE_MAP_NEGATIVE_Y: number;
+    readonly TEXTURE_CUBE_MAP_NEGATIVE_Z: number;
+    readonly TEXTURE_CUBE_MAP_POSITIVE_X: number;
+    readonly TEXTURE_CUBE_MAP_POSITIVE_Y: number;
+    readonly TEXTURE_CUBE_MAP_POSITIVE_Z: number;
+    readonly TEXTURE_MAG_FILTER: number;
+    readonly TEXTURE_MIN_FILTER: number;
+    readonly TEXTURE_WRAP_S: number;
+    readonly TEXTURE_WRAP_T: number;
+    readonly TEXTURE0: number;
+    readonly TEXTURE1: number;
+    readonly TEXTURE10: number;
+    readonly TEXTURE11: number;
+    readonly TEXTURE12: number;
+    readonly TEXTURE13: number;
+    readonly TEXTURE14: number;
+    readonly TEXTURE15: number;
+    readonly TEXTURE16: number;
+    readonly TEXTURE17: number;
+    readonly TEXTURE18: number;
+    readonly TEXTURE19: number;
+    readonly TEXTURE2: number;
+    readonly TEXTURE20: number;
+    readonly TEXTURE21: number;
+    readonly TEXTURE22: number;
+    readonly TEXTURE23: number;
+    readonly TEXTURE24: number;
+    readonly TEXTURE25: number;
+    readonly TEXTURE26: number;
+    readonly TEXTURE27: number;
+    readonly TEXTURE28: number;
+    readonly TEXTURE29: number;
+    readonly TEXTURE3: number;
+    readonly TEXTURE30: number;
+    readonly TEXTURE31: number;
+    readonly TEXTURE4: number;
+    readonly TEXTURE5: number;
+    readonly TEXTURE6: number;
+    readonly TEXTURE7: number;
+    readonly TEXTURE8: number;
+    readonly TEXTURE9: number;
+    readonly TRIANGLE_FAN: number;
+    readonly TRIANGLE_STRIP: number;
+    readonly TRIANGLES: number;
+    readonly UNPACK_ALIGNMENT: number;
+    readonly UNPACK_COLORSPACE_CONVERSION_WEBGL: number;
+    readonly UNPACK_FLIP_Y_WEBGL: number;
+    readonly UNPACK_PREMULTIPLY_ALPHA_WEBGL: number;
+    readonly UNSIGNED_BYTE: number;
+    readonly UNSIGNED_INT: number;
+    readonly UNSIGNED_SHORT: number;
+    readonly UNSIGNED_SHORT_4_4_4_4: number;
+    readonly UNSIGNED_SHORT_5_5_5_1: number;
+    readonly UNSIGNED_SHORT_5_6_5: number;
+    readonly VALIDATE_STATUS: number;
+    readonly VENDOR: number;
+    readonly VERSION: number;
+    readonly VERTEX_ATTRIB_ARRAY_BUFFER_BINDING: number;
+    readonly VERTEX_ATTRIB_ARRAY_ENABLED: number;
+    readonly VERTEX_ATTRIB_ARRAY_NORMALIZED: number;
+    readonly VERTEX_ATTRIB_ARRAY_POINTER: number;
+    readonly VERTEX_ATTRIB_ARRAY_SIZE: number;
+    readonly VERTEX_ATTRIB_ARRAY_STRIDE: number;
+    readonly VERTEX_ATTRIB_ARRAY_TYPE: number;
+    readonly VERTEX_SHADER: number;
+    readonly VIEWPORT: number;
+    readonly ZERO: number;
+};
+
+interface WebGLShader extends WebGLObject {
+}
+
+declare var WebGLShader: {
+    prototype: WebGLShader;
+    new(): WebGLShader;
+};
+
+interface WebGLShaderPrecisionFormat {
+    readonly precision: number;
+    readonly rangeMax: number;
+    readonly rangeMin: number;
+}
+
+declare var WebGLShaderPrecisionFormat: {
+    prototype: WebGLShaderPrecisionFormat;
+    new(): WebGLShaderPrecisionFormat;
+};
+
+interface WebGLTexture extends WebGLObject {
+}
+
+declare var WebGLTexture: {
+    prototype: WebGLTexture;
+    new(): WebGLTexture;
+};
+
+interface WebGLUniformLocation {
+}
+
+declare var WebGLUniformLocation: {
+    prototype: WebGLUniformLocation;
+    new(): WebGLUniformLocation;
+};
+
+interface WebKitCSSMatrix {
+    a: number;
+    b: number;
+    c: number;
+    d: number;
+    e: number;
+    f: number;
+    m11: number;
+    m12: number;
+    m13: number;
+    m14: number;
+    m21: number;
+    m22: number;
+    m23: number;
+    m24: number;
+    m31: number;
+    m32: number;
+    m33: number;
+    m34: number;
+    m41: number;
+    m42: number;
+    m43: number;
+    m44: number;
+    inverse(): WebKitCSSMatrix;
+    multiply(secondMatrix: WebKitCSSMatrix): WebKitCSSMatrix;
+    rotate(angleX: number, angleY?: number, angleZ?: number): WebKitCSSMatrix;
+    rotateAxisAngle(x: number, y: number, z: number, angle: number): WebKitCSSMatrix;
+    scale(scaleX: number, scaleY?: number, scaleZ?: number): WebKitCSSMatrix;
+    setMatrixValue(value: string): void;
+    skewX(angle: number): WebKitCSSMatrix;
+    skewY(angle: number): WebKitCSSMatrix;
+    toString(): string;
+    translate(x: number, y: number, z?: number): WebKitCSSMatrix;
+}
+
+declare var WebKitCSSMatrix: {
+    prototype: WebKitCSSMatrix;
+    new(text?: string): WebKitCSSMatrix;
+};
+
+interface WebKitDirectoryEntry extends WebKitEntry {
+    createReader(): WebKitDirectoryReader;
+}
+
+declare var WebKitDirectoryEntry: {
+    prototype: WebKitDirectoryEntry;
+    new(): WebKitDirectoryEntry;
+};
+
+interface WebKitDirectoryReader {
+    readEntries(successCallback: WebKitEntriesCallback, errorCallback?: WebKitErrorCallback): void;
+}
+
+declare var WebKitDirectoryReader: {
+    prototype: WebKitDirectoryReader;
+    new(): WebKitDirectoryReader;
+};
+
+interface WebKitEntry {
+    readonly filesystem: WebKitFileSystem;
+    readonly fullPath: string;
+    readonly isDirectory: boolean;
+    readonly isFile: boolean;
+    readonly name: string;
+}
+
+declare var WebKitEntry: {
+    prototype: WebKitEntry;
+    new(): WebKitEntry;
+};
+
+interface WebKitFileEntry extends WebKitEntry {
+    file(successCallback: WebKitFileCallback, errorCallback?: WebKitErrorCallback): void;
+}
+
+declare var WebKitFileEntry: {
+    prototype: WebKitFileEntry;
+    new(): WebKitFileEntry;
+};
+
+interface WebKitFileSystem {
+    readonly name: string;
+    readonly root: WebKitDirectoryEntry;
+}
+
+declare var WebKitFileSystem: {
+    prototype: WebKitFileSystem;
+    new(): WebKitFileSystem;
+};
+
+interface WebKitPoint {
+    x: number;
+    y: number;
+}
+
+declare var WebKitPoint: {
+    prototype: WebKitPoint;
+    new(x?: number, y?: number): WebKitPoint;
+};
+
+interface webkitRTCPeerConnection extends RTCPeerConnection {
+    addEventListener<K extends keyof RTCPeerConnectionEventMap>(type: K, listener: (this: webkitRTCPeerConnection, ev: RTCPeerConnectionEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var webkitRTCPeerConnection: {
+    prototype: webkitRTCPeerConnection;
+    new(configuration: RTCConfiguration): webkitRTCPeerConnection;
+};
+
+interface WebSocketEventMap {
+    "close": CloseEvent;
+    "error": Event;
+    "message": MessageEvent;
+    "open": Event;
+}
+
+interface WebSocket extends EventTarget {
+    binaryType: string;
+    readonly bufferedAmount: number;
+    readonly extensions: string;
+    onclose: (this: WebSocket, ev: CloseEvent) => any;
+    onerror: (this: WebSocket, ev: Event) => any;
+    onmessage: (this: WebSocket, ev: MessageEvent) => any;
+    onopen: (this: WebSocket, ev: Event) => any;
+    readonly protocol: string;
+    readonly readyState: number;
+    readonly url: string;
+    close(code?: number, reason?: string): void;
+    send(data: any): void;
+    readonly CLOSED: number;
+    readonly CLOSING: number;
+    readonly CONNECTING: number;
+    readonly OPEN: number;
+    addEventListener<K extends keyof WebSocketEventMap>(type: K, listener: (this: WebSocket, ev: WebSocketEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var WebSocket: {
+    prototype: WebSocket;
+    new(url: string, protocols?: string | string[]): WebSocket;
+    readonly CLOSED: number;
+    readonly CLOSING: number;
+    readonly CONNECTING: number;
+    readonly OPEN: number;
+};
+
+interface WheelEvent extends MouseEvent {
+    readonly deltaMode: number;
+    readonly deltaX: number;
+    readonly deltaY: number;
+    readonly deltaZ: number;
+    readonly wheelDelta: number;
+    readonly wheelDeltaX: number;
+    readonly wheelDeltaY: number;
+    getCurrentPoint(element: Element): void;
+    initWheelEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, buttonArg: number, relatedTargetArg: EventTarget, modifiersListArg: string, deltaXArg: number, deltaYArg: number, deltaZArg: number, deltaMode: number): void;
+    readonly DOM_DELTA_LINE: number;
+    readonly DOM_DELTA_PAGE: number;
+    readonly DOM_DELTA_PIXEL: number;
+}
+
+declare var WheelEvent: {
+    prototype: WheelEvent;
+    new(typeArg: string, eventInitDict?: WheelEventInit): WheelEvent;
+    readonly DOM_DELTA_LINE: number;
+    readonly DOM_DELTA_PAGE: number;
+    readonly DOM_DELTA_PIXEL: number;
+};
+
+interface WindowEventMap extends GlobalEventHandlersEventMap {
+    "abort": UIEvent;
+    "afterprint": Event;
+    "beforeprint": Event;
+    "beforeunload": BeforeUnloadEvent;
+    "blur": FocusEvent;
+    "canplay": Event;
+    "canplaythrough": Event;
+    "change": Event;
+    "click": MouseEvent;
+    "compassneedscalibration": Event;
+    "contextmenu": PointerEvent;
+    "dblclick": MouseEvent;
+    "devicelight": DeviceLightEvent;
+    "devicemotion": DeviceMotionEvent;
+    "deviceorientation": DeviceOrientationEvent;
+    "drag": DragEvent;
+    "dragend": DragEvent;
+    "dragenter": DragEvent;
+    "dragleave": DragEvent;
+    "dragover": DragEvent;
+    "dragstart": DragEvent;
+    "drop": DragEvent;
+    "durationchange": Event;
+    "emptied": Event;
+    "ended": MediaStreamErrorEvent;
+    "error": ErrorEvent;
+    "focus": FocusEvent;
+    "hashchange": HashChangeEvent;
+    "input": Event;
+    "invalid": Event;
+    "keydown": KeyboardEvent;
+    "keypress": KeyboardEvent;
+    "keyup": KeyboardEvent;
+    "load": Event;
+    "loadeddata": Event;
+    "loadedmetadata": Event;
+    "loadstart": Event;
+    "message": MessageEvent;
+    "mousedown": MouseEvent;
+    "mouseenter": MouseEvent;
+    "mouseleave": MouseEvent;
+    "mousemove": MouseEvent;
+    "mouseout": MouseEvent;
+    "mouseover": MouseEvent;
+    "mouseup": MouseEvent;
+    "mousewheel": WheelEvent;
+    "MSGestureChange": MSGestureEvent;
+    "MSGestureDoubleTap": MSGestureEvent;
+    "MSGestureEnd": MSGestureEvent;
+    "MSGestureHold": MSGestureEvent;
+    "MSGestureStart": MSGestureEvent;
+    "MSGestureTap": MSGestureEvent;
+    "MSInertiaStart": MSGestureEvent;
+    "MSPointerCancel": MSPointerEvent;
+    "MSPointerDown": MSPointerEvent;
+    "MSPointerEnter": MSPointerEvent;
+    "MSPointerLeave": MSPointerEvent;
+    "MSPointerMove": MSPointerEvent;
+    "MSPointerOut": MSPointerEvent;
+    "MSPointerOver": MSPointerEvent;
+    "MSPointerUp": MSPointerEvent;
+    "offline": Event;
+    "online": Event;
+    "orientationchange": Event;
+    "pagehide": PageTransitionEvent;
+    "pageshow": PageTransitionEvent;
+    "pause": Event;
+    "play": Event;
+    "playing": Event;
+    "popstate": PopStateEvent;
+    "progress": ProgressEvent;
+    "ratechange": Event;
+    "readystatechange": ProgressEvent;
+    "reset": Event;
+    "resize": UIEvent;
+    "scroll": UIEvent;
+    "seeked": Event;
+    "seeking": Event;
+    "select": UIEvent;
+    "stalled": Event;
+    "storage": StorageEvent;
+    "submit": Event;
+    "suspend": Event;
+    "timeupdate": Event;
+    "touchcancel": TouchEvent;
+    "touchend": TouchEvent;
+    "touchmove": TouchEvent;
+    "touchstart": TouchEvent;
+    "unload": Event;
+    "volumechange": Event;
+    "waiting": Event;
+}
+
+interface Window extends EventTarget, WindowTimers, WindowSessionStorage, WindowLocalStorage, WindowConsole, GlobalEventHandlers, IDBEnvironment, WindowBase64, GlobalFetch {
+    readonly applicationCache: ApplicationCache;
+    readonly caches: CacheStorage;
+    readonly clientInformation: Navigator;
+    readonly closed: boolean;
+    readonly crypto: Crypto;
+    defaultStatus: string;
+    readonly devicePixelRatio: number;
+    readonly document: Document;
+    readonly doNotTrack: string;
+    event: Event | undefined;
+    readonly external: External;
+    readonly frameElement: Element;
+    readonly frames: Window;
+    readonly history: History;
+    readonly innerHeight: number;
+    readonly innerWidth: number;
+    readonly isSecureContext: boolean;
+    readonly length: number;
+    readonly location: Location;
+    readonly locationbar: BarProp;
+    readonly menubar: BarProp;
+    readonly msContentScript: ExtensionScriptApis;
+    readonly msCredentials: MSCredentials;
+    name: string;
+    readonly navigator: Navigator;
+    offscreenBuffering: string | boolean;
+    onabort: (this: Window, ev: UIEvent) => any;
+    onafterprint: (this: Window, ev: Event) => any;
+    onbeforeprint: (this: Window, ev: Event) => any;
+    onbeforeunload: (this: Window, ev: BeforeUnloadEvent) => any;
+    onblur: (this: Window, ev: FocusEvent) => any;
+    oncanplay: (this: Window, ev: Event) => any;
+    oncanplaythrough: (this: Window, ev: Event) => any;
+    onchange: (this: Window, ev: Event) => any;
+    onclick: (this: Window, ev: MouseEvent) => any;
+    oncompassneedscalibration: (this: Window, ev: Event) => any;
+    oncontextmenu: (this: Window, ev: PointerEvent) => any;
+    ondblclick: (this: Window, ev: MouseEvent) => any;
+    ondevicelight: (this: Window, ev: DeviceLightEvent) => any;
+    ondevicemotion: (this: Window, ev: DeviceMotionEvent) => any;
+    ondeviceorientation: (this: Window, ev: DeviceOrientationEvent) => any;
+    ondrag: (this: Window, ev: DragEvent) => any;
+    ondragend: (this: Window, ev: DragEvent) => any;
+    ondragenter: (this: Window, ev: DragEvent) => any;
+    ondragleave: (this: Window, ev: DragEvent) => any;
+    ondragover: (this: Window, ev: DragEvent) => any;
+    ondragstart: (this: Window, ev: DragEvent) => any;
+    ondrop: (this: Window, ev: DragEvent) => any;
+    ondurationchange: (this: Window, ev: Event) => any;
+    onemptied: (this: Window, ev: Event) => any;
+    onended: (this: Window, ev: MediaStreamErrorEvent) => any;
+    onerror: ErrorEventHandler;
+    onfocus: (this: Window, ev: FocusEvent) => any;
+    onhashchange: (this: Window, ev: HashChangeEvent) => any;
+    oninput: (this: Window, ev: Event) => any;
+    oninvalid: (this: Window, ev: Event) => any;
+    onkeydown: (this: Window, ev: KeyboardEvent) => any;
+    onkeypress: (this: Window, ev: KeyboardEvent) => any;
+    onkeyup: (this: Window, ev: KeyboardEvent) => any;
+    onload: (this: Window, ev: Event) => any;
+    onloadeddata: (this: Window, ev: Event) => any;
+    onloadedmetadata: (this: Window, ev: Event) => any;
+    onloadstart: (this: Window, ev: Event) => any;
+    onmessage: (this: Window, ev: MessageEvent) => any;
+    onmousedown: (this: Window, ev: MouseEvent) => any;
+    onmouseenter: (this: Window, ev: MouseEvent) => any;
+    onmouseleave: (this: Window, ev: MouseEvent) => any;
+    onmousemove: (this: Window, ev: MouseEvent) => any;
+    onmouseout: (this: Window, ev: MouseEvent) => any;
+    onmouseover: (this: Window, ev: MouseEvent) => any;
+    onmouseup: (this: Window, ev: MouseEvent) => any;
+    onmousewheel: (this: Window, ev: WheelEvent) => any;
+    onmsgesturechange: (this: Window, ev: MSGestureEvent) => any;
+    onmsgesturedoubletap: (this: Window, ev: MSGestureEvent) => any;
+    onmsgestureend: (this: Window, ev: MSGestureEvent) => any;
+    onmsgesturehold: (this: Window, ev: MSGestureEvent) => any;
+    onmsgesturestart: (this: Window, ev: MSGestureEvent) => any;
+    onmsgesturetap: (this: Window, ev: MSGestureEvent) => any;
+    onmsinertiastart: (this: Window, ev: MSGestureEvent) => any;
+    onmspointercancel: (this: Window, ev: MSPointerEvent) => any;
+    onmspointerdown: (this: Window, ev: MSPointerEvent) => any;
+    onmspointerenter: (this: Window, ev: MSPointerEvent) => any;
+    onmspointerleave: (this: Window, ev: MSPointerEvent) => any;
+    onmspointermove: (this: Window, ev: MSPointerEvent) => any;
+    onmspointerout: (this: Window, ev: MSPointerEvent) => any;
+    onmspointerover: (this: Window, ev: MSPointerEvent) => any;
+    onmspointerup: (this: Window, ev: MSPointerEvent) => any;
+    onoffline: (this: Window, ev: Event) => any;
+    ononline: (this: Window, ev: Event) => any;
+    onorientationchange: (this: Window, ev: Event) => any;
+    onpagehide: (this: Window, ev: PageTransitionEvent) => any;
+    onpageshow: (this: Window, ev: PageTransitionEvent) => any;
+    onpause: (this: Window, ev: Event) => any;
+    onplay: (this: Window, ev: Event) => any;
+    onplaying: (this: Window, ev: Event) => any;
+    onpopstate: (this: Window, ev: PopStateEvent) => any;
+    onprogress: (this: Window, ev: ProgressEvent) => any;
+    onratechange: (this: Window, ev: Event) => any;
+    onreadystatechange: (this: Window, ev: ProgressEvent) => any;
+    onreset: (this: Window, ev: Event) => any;
+    onresize: (this: Window, ev: UIEvent) => any;
+    onscroll: (this: Window, ev: UIEvent) => any;
+    onseeked: (this: Window, ev: Event) => any;
+    onseeking: (this: Window, ev: Event) => any;
+    onselect: (this: Window, ev: UIEvent) => any;
+    onstalled: (this: Window, ev: Event) => any;
+    onstorage: (this: Window, ev: StorageEvent) => any;
+    onsubmit: (this: Window, ev: Event) => any;
+    onsuspend: (this: Window, ev: Event) => any;
+    ontimeupdate: (this: Window, ev: Event) => any;
+    ontouchcancel: (ev: TouchEvent) => any;
+    ontouchend: (ev: TouchEvent) => any;
+    ontouchmove: (ev: TouchEvent) => any;
+    ontouchstart: (ev: TouchEvent) => any;
+    onunload: (this: Window, ev: Event) => any;
+    onvolumechange: (this: Window, ev: Event) => any;
+    onwaiting: (this: Window, ev: Event) => any;
+    opener: any;
+    orientation: string | number;
+    readonly outerHeight: number;
+    readonly outerWidth: number;
+    readonly pageXOffset: number;
+    readonly pageYOffset: number;
+    readonly parent: Window;
+    readonly performance: Performance;
+    readonly personalbar: BarProp;
+    readonly screen: Screen;
+    readonly screenLeft: number;
+    readonly screenTop: number;
+    readonly screenX: number;
+    readonly screenY: number;
+    readonly scrollbars: BarProp;
+    readonly scrollX: number;
+    readonly scrollY: number;
+    readonly self: Window;
+    readonly speechSynthesis: SpeechSynthesis;
+    status: string;
+    readonly statusbar: BarProp;
+    readonly styleMedia: StyleMedia;
+    readonly toolbar: BarProp;
+    readonly top: Window;
+    readonly window: Window;
+    URL: typeof URL;
+    URLSearchParams: typeof URLSearchParams;
+    Blob: typeof Blob;
+    customElements: CustomElementRegistry;
+    alert(message?: any): void;
+    blur(): void;
+    cancelAnimationFrame(handle: number): void;
+    captureEvents(): void;
+    close(): void;
+    confirm(message?: string): boolean;
+    departFocus(navigationReason: NavigationReason, origin: FocusNavigationOrigin): void;
+    focus(): void;
+    getComputedStyle(elt: Element, pseudoElt?: string): CSSStyleDeclaration;
+    getMatchedCSSRules(elt: Element, pseudoElt?: string): CSSRuleList;
+    getSelection(): Selection;
+    matchMedia(mediaQuery: string): MediaQueryList;
+    moveBy(x?: number, y?: number): void;
+    moveTo(x?: number, y?: number): void;
+    msWriteProfilerMark(profilerMarkName: string): void;
+    open(url?: string, target?: string, features?: string, replace?: boolean): Window;
+    postMessage(message: any, targetOrigin: string, transfer?: any[]): void;
+    print(): void;
+    prompt(message?: string, _default?: string): string | null;
+    releaseEvents(): void;
+    requestAnimationFrame(callback: FrameRequestCallback): number;
+    resizeBy(x?: number, y?: number): void;
+    resizeTo(x?: number, y?: number): void;
+    scroll(x?: number, y?: number): void;
+    scrollBy(x?: number, y?: number): void;
+    scrollTo(x?: number, y?: number): void;
+    stop(): void;
+    webkitCancelAnimationFrame(handle: number): void;
+    webkitConvertPointFromNodeToPage(node: Node, pt: WebKitPoint): WebKitPoint;
+    webkitConvertPointFromPageToNode(node: Node, pt: WebKitPoint): WebKitPoint;
+    webkitRequestAnimationFrame(callback: FrameRequestCallback): number;
+    createImageBitmap(image: HTMLImageElement | SVGImageElement | HTMLVideoElement | HTMLCanvasElement | ImageBitmap | ImageData | Blob, options?: ImageBitmapOptions): Promise<ImageBitmap>;
+    createImageBitmap(image: HTMLImageElement | SVGImageElement | HTMLVideoElement | HTMLCanvasElement | ImageBitmap | ImageData | Blob, sx: number, sy: number, sw: number, sh: number, options?: ImageBitmapOptions): Promise<ImageBitmap>;
+    scroll(options?: ScrollToOptions): void;
+    scrollTo(options?: ScrollToOptions): void;
+    scrollBy(options?: ScrollToOptions): void;
+    addEventListener<K extends keyof WindowEventMap>(type: K, listener: (this: Window, ev: WindowEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var Window: {
+    prototype: Window;
+    new(): Window;
+};
+
+interface WorkerEventMap extends AbstractWorkerEventMap {
+    "message": MessageEvent;
+}
+
+interface Worker extends EventTarget, AbstractWorker {
+    onmessage: (this: Worker, ev: MessageEvent) => any;
+    postMessage(message: any, transfer?: any[]): void;
+    terminate(): void;
+    addEventListener<K extends keyof WorkerEventMap>(type: K, listener: (this: Worker, ev: WorkerEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var Worker: {
+    prototype: Worker;
+    new(stringUrl: string): Worker;
+};
+
+interface XMLDocument extends Document {
+    addEventListener<K extends keyof DocumentEventMap>(type: K, listener: (this: XMLDocument, ev: DocumentEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var XMLDocument: {
+    prototype: XMLDocument;
+    new(): XMLDocument;
+};
+
+interface XMLHttpRequestEventMap extends XMLHttpRequestEventTargetEventMap {
+    "readystatechange": Event;
+}
+
+interface XMLHttpRequest extends EventTarget, XMLHttpRequestEventTarget {
+    onreadystatechange: (this: XMLHttpRequest, ev: Event) => any;
+    readonly readyState: number;
+    readonly response: any;
+    readonly responseText: string;
+    responseType: XMLHttpRequestResponseType;
+    readonly responseURL: string;
+    readonly responseXML: Document | null;
+    readonly status: number;
+    readonly statusText: string;
+    timeout: number;
+    readonly upload: XMLHttpRequestUpload;
+    withCredentials: boolean;
+    msCaching?: string;
+    abort(): void;
+    getAllResponseHeaders(): string;
+    getResponseHeader(header: string): string | null;
+    msCachingEnabled(): boolean;
+    open(method: string, url: string, async?: boolean, user?: string, password?: string): void;
+    overrideMimeType(mime: string): void;
+    send(data?: Document): void;
+    send(data?: string): void;
+    send(data?: any): void;
+    setRequestHeader(header: string, value: string): void;
+    readonly DONE: number;
+    readonly HEADERS_RECEIVED: number;
+    readonly LOADING: number;
+    readonly OPENED: number;
+    readonly UNSENT: number;
+    addEventListener<K extends keyof XMLHttpRequestEventMap>(type: K, listener: (this: XMLHttpRequest, ev: XMLHttpRequestEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var XMLHttpRequest: {
+    prototype: XMLHttpRequest;
+    new(): XMLHttpRequest;
+    readonly DONE: number;
+    readonly HEADERS_RECEIVED: number;
+    readonly LOADING: number;
+    readonly OPENED: number;
+    readonly UNSENT: number;
+};
+
+interface XMLHttpRequestUpload extends EventTarget, XMLHttpRequestEventTarget {
+    addEventListener<K extends keyof XMLHttpRequestEventTargetEventMap>(type: K, listener: (this: XMLHttpRequestUpload, ev: XMLHttpRequestEventTargetEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var XMLHttpRequestUpload: {
+    prototype: XMLHttpRequestUpload;
+    new(): XMLHttpRequestUpload;
+};
+
+interface XMLSerializer {
+    serializeToString(target: Node): string;
+}
+
+declare var XMLSerializer: {
+    prototype: XMLSerializer;
+    new(): XMLSerializer;
+};
+
+interface XPathEvaluator {
+    createExpression(expression: string, resolver: XPathNSResolver): XPathExpression;
+    createNSResolver(nodeResolver?: Node): XPathNSResolver;
+    evaluate(expression: string, contextNode: Node, resolver: XPathNSResolver | null, type: number, result: XPathResult | null): XPathResult;
+}
+
+declare var XPathEvaluator: {
+    prototype: XPathEvaluator;
+    new(): XPathEvaluator;
+};
+
+interface XPathExpression {
+    evaluate(contextNode: Node, type: number, result: XPathResult | null): XPathResult;
+}
+
+declare var XPathExpression: {
+    prototype: XPathExpression;
+    new(): XPathExpression;
+};
+
+interface XPathNSResolver {
+    lookupNamespaceURI(prefix: string): string;
+}
+
+declare var XPathNSResolver: {
+    prototype: XPathNSResolver;
+    new(): XPathNSResolver;
+};
+
+interface XPathResult {
+    readonly booleanValue: boolean;
+    readonly invalidIteratorState: boolean;
+    readonly numberValue: number;
+    readonly resultType: number;
+    readonly singleNodeValue: Node;
+    readonly snapshotLength: number;
+    readonly stringValue: string;
+    iterateNext(): Node;
+    snapshotItem(index: number): Node;
+    readonly ANY_TYPE: number;
+    readonly ANY_UNORDERED_NODE_TYPE: number;
+    readonly BOOLEAN_TYPE: number;
+    readonly FIRST_ORDERED_NODE_TYPE: number;
+    readonly NUMBER_TYPE: number;
+    readonly ORDERED_NODE_ITERATOR_TYPE: number;
+    readonly ORDERED_NODE_SNAPSHOT_TYPE: number;
+    readonly STRING_TYPE: number;
+    readonly UNORDERED_NODE_ITERATOR_TYPE: number;
+    readonly UNORDERED_NODE_SNAPSHOT_TYPE: number;
+}
+
+declare var XPathResult: {
+    prototype: XPathResult;
+    new(): XPathResult;
+    readonly ANY_TYPE: number;
+    readonly ANY_UNORDERED_NODE_TYPE: number;
+    readonly BOOLEAN_TYPE: number;
+    readonly FIRST_ORDERED_NODE_TYPE: number;
+    readonly NUMBER_TYPE: number;
+    readonly ORDERED_NODE_ITERATOR_TYPE: number;
+    readonly ORDERED_NODE_SNAPSHOT_TYPE: number;
+    readonly STRING_TYPE: number;
+    readonly UNORDERED_NODE_ITERATOR_TYPE: number;
+    readonly UNORDERED_NODE_SNAPSHOT_TYPE: number;
+};
+
+interface XSLTProcessor {
+    clearParameters(): void;
+    getParameter(namespaceURI: string, localName: string): any;
+    importStylesheet(style: Node): void;
+    removeParameter(namespaceURI: string, localName: string): void;
+    reset(): void;
+    setParameter(namespaceURI: string, localName: string, value: any): void;
+    transformToDocument(source: Node): Document;
+    transformToFragment(source: Node, document: Document): DocumentFragment;
+}
+
+declare var XSLTProcessor: {
+    prototype: XSLTProcessor;
+    new(): XSLTProcessor;
+};
+
+interface AbstractWorkerEventMap {
+    "error": ErrorEvent;
+}
+
+interface AbstractWorker {
+    onerror: (this: AbstractWorker, ev: ErrorEvent) => any;
+    addEventListener<K extends keyof AbstractWorkerEventMap>(type: K, listener: (this: AbstractWorker, ev: AbstractWorkerEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+interface Body {
+    readonly bodyUsed: boolean;
+    arrayBuffer(): Promise<ArrayBuffer>;
+    blob(): Promise<Blob>;
+    json(): Promise<any>;
+    text(): Promise<string>;
+    formData(): Promise<FormData>;
+}
+
+interface CanvasPathMethods {
+    arc(x: number, y: number, radius: number, startAngle: number, endAngle: number, anticlockwise?: boolean): void;
+    arcTo(x1: number, y1: number, x2: number, y2: number, radius: number): void;
+    bezierCurveTo(cp1x: number, cp1y: number, cp2x: number, cp2y: number, x: number, y: number): void;
+    closePath(): void;
+    ellipse(x: number, y: number, radiusX: number, radiusY: number, rotation: number, startAngle: number, endAngle: number, anticlockwise?: boolean): void;
+    lineTo(x: number, y: number): void;
+    moveTo(x: number, y: number): void;
+    quadraticCurveTo(cpx: number, cpy: number, x: number, y: number): void;
+    rect(x: number, y: number, w: number, h: number): void;
+}
+
+interface ChildNode {
+    remove(): void;
+}
+
+interface DocumentEvent {
+    createEvent(eventInterface: "AnimationEvent"): AnimationEvent;
+    createEvent(eventInterface: "AudioProcessingEvent"): AudioProcessingEvent;
+    createEvent(eventInterface: "BeforeUnloadEvent"): BeforeUnloadEvent;
+    createEvent(eventInterface: "ClipboardEvent"): ClipboardEvent;
+    createEvent(eventInterface: "CloseEvent"): CloseEvent;
+    createEvent(eventInterface: "CompositionEvent"): CompositionEvent;
+    createEvent(eventInterface: "CustomEvent"): CustomEvent;
+    createEvent(eventInterface: "DeviceLightEvent"): DeviceLightEvent;
+    createEvent(eventInterface: "DeviceMotionEvent"): DeviceMotionEvent;
+    createEvent(eventInterface: "DeviceOrientationEvent"): DeviceOrientationEvent;
+    createEvent(eventInterface: "DragEvent"): DragEvent;
+    createEvent(eventInterface: "ErrorEvent"): ErrorEvent;
+    createEvent(eventInterface: "Event"): Event;
+    createEvent(eventInterface: "Events"): Event;
+    createEvent(eventInterface: "FocusEvent"): FocusEvent;
+    createEvent(eventInterface: "FocusNavigationEvent"): FocusNavigationEvent;
+    createEvent(eventInterface: "GamepadEvent"): GamepadEvent;
+    createEvent(eventInterface: "HashChangeEvent"): HashChangeEvent;
+    createEvent(eventInterface: "IDBVersionChangeEvent"): IDBVersionChangeEvent;
+    createEvent(eventInterface: "KeyboardEvent"): KeyboardEvent;
+    createEvent(eventInterface: "ListeningStateChangedEvent"): ListeningStateChangedEvent;
+    createEvent(eventInterface: "LongRunningScriptDetectedEvent"): LongRunningScriptDetectedEvent;
+    createEvent(eventInterface: "MSGestureEvent"): MSGestureEvent;
+    createEvent(eventInterface: "MSManipulationEvent"): MSManipulationEvent;
+    createEvent(eventInterface: "MSMediaKeyMessageEvent"): MSMediaKeyMessageEvent;
+    createEvent(eventInterface: "MSMediaKeyNeededEvent"): MSMediaKeyNeededEvent;
+    createEvent(eventInterface: "MSPointerEvent"): MSPointerEvent;
+    createEvent(eventInterface: "MSSiteModeEvent"): MSSiteModeEvent;
+    createEvent(eventInterface: "MediaEncryptedEvent"): MediaEncryptedEvent;
+    createEvent(eventInterface: "MediaKeyMessageEvent"): MediaKeyMessageEvent;
+    createEvent(eventInterface: "MediaStreamErrorEvent"): MediaStreamErrorEvent;
+    createEvent(eventInterface: "MediaStreamEvent"): MediaStreamEvent;
+    createEvent(eventInterface: "MediaStreamTrackEvent"): MediaStreamTrackEvent;
+    createEvent(eventInterface: "MessageEvent"): MessageEvent;
+    createEvent(eventInterface: "MouseEvent"): MouseEvent;
+    createEvent(eventInterface: "MouseEvents"): MouseEvent;
+    createEvent(eventInterface: "MutationEvent"): MutationEvent;
+    createEvent(eventInterface: "MutationEvents"): MutationEvent;
+    createEvent(eventInterface: "NavigationCompletedEvent"): NavigationCompletedEvent;
+    createEvent(eventInterface: "NavigationEvent"): NavigationEvent;
+    createEvent(eventInterface: "NavigationEventWithReferrer"): NavigationEventWithReferrer;
+    createEvent(eventInterface: "OfflineAudioCompletionEvent"): OfflineAudioCompletionEvent;
+    createEvent(eventInterface: "OverflowEvent"): OverflowEvent;
+    createEvent(eventInterface: "PageTransitionEvent"): PageTransitionEvent;
+    createEvent(eventInterface: "PaymentRequestUpdateEvent"): PaymentRequestUpdateEvent;
+    createEvent(eventInterface: "PermissionRequestedEvent"): PermissionRequestedEvent;
+    createEvent(eventInterface: "PointerEvent"): PointerEvent;
+    createEvent(eventInterface: "PopStateEvent"): PopStateEvent;
+    createEvent(eventInterface: "ProgressEvent"): ProgressEvent;
+    createEvent(eventInterface: "RTCDTMFToneChangeEvent"): RTCDTMFToneChangeEvent;
+    createEvent(eventInterface: "RTCDtlsTransportStateChangedEvent"): RTCDtlsTransportStateChangedEvent;
+    createEvent(eventInterface: "RTCIceCandidatePairChangedEvent"): RTCIceCandidatePairChangedEvent;
+    createEvent(eventInterface: "RTCIceGathererEvent"): RTCIceGathererEvent;
+    createEvent(eventInterface: "RTCIceTransportStateChangedEvent"): RTCIceTransportStateChangedEvent;
+    createEvent(eventInterface: "RTCPeerConnectionIceEvent"): RTCPeerConnectionIceEvent;
+    createEvent(eventInterface: "RTCSsrcConflictEvent"): RTCSsrcConflictEvent;
+    createEvent(eventInterface: "SVGZoomEvent"): SVGZoomEvent;
+    createEvent(eventInterface: "SVGZoomEvents"): SVGZoomEvent;
+    createEvent(eventInterface: "ScriptNotifyEvent"): ScriptNotifyEvent;
+    createEvent(eventInterface: "ServiceWorkerMessageEvent"): ServiceWorkerMessageEvent;
+    createEvent(eventInterface: "SpeechSynthesisEvent"): SpeechSynthesisEvent;
+    createEvent(eventInterface: "StorageEvent"): StorageEvent;
+    createEvent(eventInterface: "TextEvent"): TextEvent;
+    createEvent(eventInterface: "TouchEvent"): TouchEvent;
+    createEvent(eventInterface: "TrackEvent"): TrackEvent;
+    createEvent(eventInterface: "TransitionEvent"): TransitionEvent;
+    createEvent(eventInterface: "UIEvent"): UIEvent;
+    createEvent(eventInterface: "UIEvents"): UIEvent;
+    createEvent(eventInterface: "UnviewableContentIdentifiedEvent"): UnviewableContentIdentifiedEvent;
+    createEvent(eventInterface: "WebGLContextEvent"): WebGLContextEvent;
+    createEvent(eventInterface: "WheelEvent"): WheelEvent;
+    createEvent(eventInterface: string): Event;
+}
+
+interface DOML2DeprecatedColorProperty {
+    color: string;
+}
+
+interface DOML2DeprecatedSizeProperty {
+    size: number;
+}
+
+interface ElementTraversal {
+    readonly childElementCount: number;
+    readonly firstElementChild: Element | null;
+    readonly lastElementChild: Element | null;
+    readonly nextElementSibling: Element | null;
+    readonly previousElementSibling: Element | null;
+}
+
+interface GetSVGDocument {
+    getSVGDocument(): Document;
+}
+
+interface GlobalEventHandlersEventMap {
+    "pointercancel": PointerEvent;
+    "pointerdown": PointerEvent;
+    "pointerenter": PointerEvent;
+    "pointerleave": PointerEvent;
+    "pointermove": PointerEvent;
+    "pointerout": PointerEvent;
+    "pointerover": PointerEvent;
+    "pointerup": PointerEvent;
+    "wheel": WheelEvent;
+}
+
+interface GlobalEventHandlers {
+    onpointercancel: (this: GlobalEventHandlers, ev: PointerEvent) => any;
+    onpointerdown: (this: GlobalEventHandlers, ev: PointerEvent) => any;
+    onpointerenter: (this: GlobalEventHandlers, ev: PointerEvent) => any;
+    onpointerleave: (this: GlobalEventHandlers, ev: PointerEvent) => any;
+    onpointermove: (this: GlobalEventHandlers, ev: PointerEvent) => any;
+    onpointerout: (this: GlobalEventHandlers, ev: PointerEvent) => any;
+    onpointerover: (this: GlobalEventHandlers, ev: PointerEvent) => any;
+    onpointerup: (this: GlobalEventHandlers, ev: PointerEvent) => any;
+    onwheel: (this: GlobalEventHandlers, ev: WheelEvent) => any;
+    addEventListener<K extends keyof GlobalEventHandlersEventMap>(type: K, listener: (this: GlobalEventHandlers, ev: GlobalEventHandlersEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+interface GlobalFetch {
+    fetch(input: RequestInfo, init?: RequestInit): Promise<Response>;
+}
+
+interface HTMLTableAlignment {
+    /**
+     * Sets or retrieves a value that you can use to implement your own ch functionality for the object.
+     */
+    ch: string;
+    /**
+     * Sets or retrieves a value that you can use to implement your own chOff functionality for the object.
+     */
+    chOff: string;
+    /**
+     * Sets or retrieves how text and other content are vertically aligned within the object that contains them.
+     */
+    vAlign: string;
+}
+
+interface IDBEnvironment {
+    readonly indexedDB: IDBFactory;
+}
+
+interface LinkStyle {
+    readonly sheet: StyleSheet;
+}
+
+interface MSBaseReaderEventMap {
+    "abort": Event;
+    "error": ErrorEvent;
+    "load": Event;
+    "loadend": ProgressEvent;
+    "loadstart": Event;
+    "progress": ProgressEvent;
+}
+
+interface MSBaseReader {
+    onabort: (this: MSBaseReader, ev: Event) => any;
+    onerror: (this: MSBaseReader, ev: ErrorEvent) => any;
+    onload: (this: MSBaseReader, ev: Event) => any;
+    onloadend: (this: MSBaseReader, ev: ProgressEvent) => any;
+    onloadstart: (this: MSBaseReader, ev: Event) => any;
+    onprogress: (this: MSBaseReader, ev: ProgressEvent) => any;
+    readonly readyState: number;
+    readonly result: any;
+    abort(): void;
+    readonly DONE: number;
+    readonly EMPTY: number;
+    readonly LOADING: number;
+    addEventListener<K extends keyof MSBaseReaderEventMap>(type: K, listener: (this: MSBaseReader, ev: MSBaseReaderEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+interface MSFileSaver {
+    msSaveBlob(blob: any, defaultName?: string): boolean;
+    msSaveOrOpenBlob(blob: any, defaultName?: string): boolean;
+}
+
+interface MSNavigatorDoNotTrack {
+    confirmSiteSpecificTrackingException(args: ConfirmSiteSpecificExceptionsInformation): boolean;
+    confirmWebWideTrackingException(args: ExceptionInformation): boolean;
+    removeSiteSpecificTrackingException(args: ExceptionInformation): void;
+    removeWebWideTrackingException(args: ExceptionInformation): void;
+    storeSiteSpecificTrackingException(args: StoreSiteSpecificExceptionsInformation): void;
+    storeWebWideTrackingException(args: StoreExceptionsInformation): void;
+}
+
+interface NavigatorBeacon {
+    sendBeacon(url: USVString, data?: BodyInit): boolean;
+}
+
+interface NavigatorConcurrentHardware {
+    readonly hardwareConcurrency: number;
+}
+
+interface NavigatorContentUtils {
+}
+
+interface NavigatorGeolocation {
+    readonly geolocation: Geolocation;
+}
+
+interface NavigatorID {
+    readonly appCodeName: string;
+    readonly appName: string;
+    readonly appVersion: string;
+    readonly platform: string;
+    readonly product: string;
+    readonly productSub: string;
+    readonly userAgent: string;
+    readonly vendor: string;
+    readonly vendorSub: string;
+}
+
+interface NavigatorOnLine {
+    readonly onLine: boolean;
+}
+
+interface NavigatorStorageUtils {
+}
+
+interface NavigatorUserMedia {
+    readonly mediaDevices: MediaDevices;
+    getUserMedia(constraints: MediaStreamConstraints, successCallback: NavigatorUserMediaSuccessCallback, errorCallback: NavigatorUserMediaErrorCallback): void;
+}
+
+interface NodeSelector {
+    querySelector<K extends keyof ElementTagNameMap>(selectors: K): ElementTagNameMap[K] | null;
+    querySelector(selectors: string): Element | null;
+    querySelectorAll<K extends keyof ElementListTagNameMap>(selectors: K): ElementListTagNameMap[K];
+    querySelectorAll(selectors: string): NodeListOf<Element>;
+}
+
+interface RandomSource {
+    getRandomValues(array: ArrayBufferView): ArrayBufferView;
+}
+
+interface SVGAnimatedPoints {
+    readonly animatedPoints: SVGPointList;
+    readonly points: SVGPointList;
+}
+
+interface SVGFilterPrimitiveStandardAttributes {
+    readonly height: SVGAnimatedLength;
+    readonly result: SVGAnimatedString;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+}
+
+interface SVGFitToViewBox {
+    readonly preserveAspectRatio: SVGAnimatedPreserveAspectRatio;
+    readonly viewBox: SVGAnimatedRect;
+}
+
+interface SVGTests {
+    readonly requiredExtensions: SVGStringList;
+    readonly requiredFeatures: SVGStringList;
+    readonly systemLanguage: SVGStringList;
+    hasExtension(extension: string): boolean;
+}
+
+interface SVGURIReference {
+    readonly href: SVGAnimatedString;
+}
+
+interface WindowBase64 {
+    atob(encodedString: string): string;
+    btoa(rawString: string): string;
+}
+
+interface WindowConsole {
+    readonly console: Console;
+}
+
+interface WindowLocalStorage {
+    readonly localStorage: Storage;
+}
+
+interface WindowSessionStorage {
+    readonly sessionStorage: Storage;
+}
+
+interface WindowTimers extends Object, WindowTimersExtension {
+    clearInterval(handle: number): void;
+    clearTimeout(handle: number): void;
+    setInterval(handler: (...args: any[]) => void, timeout: number): number;
+    setInterval(handler: any, timeout?: any, ...args: any[]): number;
+    setTimeout(handler: (...args: any[]) => void, timeout: number): number;
+    setTimeout(handler: any, timeout?: any, ...args: any[]): number;
+}
+
+interface WindowTimersExtension {
+    clearImmediate(handle: number): void;
+    setImmediate(handler: (...args: any[]) => void): number;
+    setImmediate(handler: any, ...args: any[]): number;
+}
+
+interface XMLHttpRequestEventTargetEventMap {
+    "abort": Event;
+    "error": ErrorEvent;
+    "load": Event;
+    "loadend": ProgressEvent;
+    "loadstart": Event;
+    "progress": ProgressEvent;
+    "timeout": ProgressEvent;
+}
+
+interface XMLHttpRequestEventTarget {
+    onabort: (this: XMLHttpRequestEventTarget, ev: Event) => any;
+    onerror: (this: XMLHttpRequestEventTarget, ev: ErrorEvent) => any;
+    onload: (this: XMLHttpRequestEventTarget, ev: Event) => any;
+    onloadend: (this: XMLHttpRequestEventTarget, ev: ProgressEvent) => any;
+    onloadstart: (this: XMLHttpRequestEventTarget, ev: Event) => any;
+    onprogress: (this: XMLHttpRequestEventTarget, ev: ProgressEvent) => any;
+    ontimeout: (this: XMLHttpRequestEventTarget, ev: ProgressEvent) => any;
+    addEventListener<K extends keyof XMLHttpRequestEventTargetEventMap>(type: K, listener: (this: XMLHttpRequestEventTarget, ev: XMLHttpRequestEventTargetEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+interface ErrorEventInit {
+    message?: string;
+    filename?: string;
+    lineno?: number;
+    conlno?: number;
+    error?: any;
+}
+
+interface StorageEventInit extends EventInit {
+    key?: string;
+    oldValue?: string;
+    newValue?: string;
+    url: string;
+    storageArea?: Storage;
+}
+
+interface Canvas2DContextAttributes {
+    alpha?: boolean;
+    willReadFrequently?: boolean;
+    storage?: boolean;
+    [attribute: string]: boolean | string | undefined;
+}
+
+interface ImageBitmapOptions {
+    imageOrientation?: "none" | "flipY";
+    premultiplyAlpha?: "none" | "premultiply" | "default";
+    colorSpaceConversion?: "none" | "default";
+    resizeWidth?: number;
+    resizeHeight?: number;
+    resizeQuality?: "pixelated" | "low" | "medium" | "high";
+}
+
+interface ImageBitmap {
+    readonly width: number;
+    readonly height: number;
+    close(): void;
+}
+
+interface URLSearchParams {
+    /**
+     * Appends a specified key/value pair as a new search parameter.
+     */
+    append(name: string, value: string): void;
+    /**
+     * Deletes the given search parameter, and its associated value, from the list of all search parameters.
+     */
+    delete(name: string): void;
+    /**
+     * Returns the first value associated to the given search parameter.
+     */
+    get(name: string): string | null;
+    /**
+     * Returns all the values association with a given search parameter.
+     */
+    getAll(name: string): string[];
+    /**
+     * Returns a Boolean indicating if such a search parameter exists.
+     */
+    has(name: string): boolean;
+    /**
+     * Sets the value associated to a given search parameter to the given value. If there were several values, delete the others.
+     */
+    set(name: string, value: string): void;
+}
+
+declare var URLSearchParams: {
+    prototype: URLSearchParams;
+    /**
+     * Constructor returning a URLSearchParams object.
+     */
+    new (init?: string | URLSearchParams): URLSearchParams;
+};
+
+interface NodeListOf<TNode extends Node> extends NodeList {
+    length: number;
+    item(index: number): TNode;
+    [index: number]: TNode;
+}
+
+interface HTMLCollectionOf<T extends Element> extends HTMLCollection {
+    item(index: number): T;
+    namedItem(name: string): T;
+    [index: number]: T;
+}
+
+interface BlobPropertyBag {
+    type?: string;
+    endings?: string;
+}
+
+interface FilePropertyBag {
+    type?: string;
+    lastModified?: number;
+}
+
+interface EventListenerObject {
+    handleEvent(evt: Event): void;
+}
+
+interface ProgressEventInit extends EventInit {
+    lengthComputable?: boolean;
+    loaded?: number;
+    total?: number;
+}
+
+interface ScrollOptions {
+    behavior?: ScrollBehavior;
+}
+
+interface ScrollToOptions extends ScrollOptions {
+    left?: number;
+    top?: number;
+}
+
+interface ScrollIntoViewOptions extends ScrollOptions {
+    block?: ScrollLogicalPosition;
+    inline?: ScrollLogicalPosition;
+}
+
+interface ClipboardEventInit extends EventInit {
+    data?: string;
+    dataType?: string;
+}
+
+interface IDBArrayKey extends Array<IDBValidKey> {
+}
+
+interface RsaKeyGenParams extends Algorithm {
+    modulusLength: number;
+    publicExponent: Uint8Array;
+}
+
+interface RsaHashedKeyGenParams extends RsaKeyGenParams {
+    hash: AlgorithmIdentifier;
+}
+
+interface RsaKeyAlgorithm extends KeyAlgorithm {
+    modulusLength: number;
+    publicExponent: Uint8Array;
+}
+
+interface RsaHashedKeyAlgorithm extends RsaKeyAlgorithm {
+    hash: AlgorithmIdentifier;
+}
+
+interface RsaHashedImportParams {
+    hash: AlgorithmIdentifier;
+}
+
+interface RsaPssParams {
+    saltLength: number;
+}
+
+interface RsaOaepParams extends Algorithm {
+    label?: BufferSource;
+}
+
+interface EcdsaParams extends Algorithm {
+    hash: AlgorithmIdentifier;
+}
+
+interface EcKeyGenParams extends Algorithm {
+    namedCurve: string;
+}
+
+interface EcKeyAlgorithm extends KeyAlgorithm {
+    typedCurve: string;
+}
+
+interface EcKeyImportParams {
+    namedCurve: string;
+}
+
+interface EcdhKeyDeriveParams extends Algorithm {
+    public: CryptoKey;
+}
+
+interface AesCtrParams extends Algorithm {
+    counter: BufferSource;
+    length: number;
+}
+
+interface AesKeyAlgorithm extends KeyAlgorithm {
+    length: number;
+}
+
+interface AesKeyGenParams extends Algorithm {
+    length: number;
+}
+
+interface AesDerivedKeyParams extends Algorithm {
+    length: number;
+}
+
+interface AesCbcParams extends Algorithm {
+    iv: BufferSource;
+}
+
+interface AesCmacParams extends Algorithm {
+    length: number;
+}
+
+interface AesGcmParams extends Algorithm {
+    iv: BufferSource;
+    additionalData?: BufferSource;
+    tagLength?: number;
+}
+
+interface AesCfbParams extends Algorithm {
+    iv: BufferSource;
+}
+
+interface HmacImportParams extends Algorithm {
+    hash?: AlgorithmIdentifier;
+    length?: number;
+}
+
+interface HmacKeyAlgorithm extends KeyAlgorithm {
+    hash: AlgorithmIdentifier;
+    length: number;
+}
+
+interface HmacKeyGenParams extends Algorithm {
+    hash: AlgorithmIdentifier;
+    length?: number;
+}
+
+interface DhKeyGenParams extends Algorithm {
+    prime: Uint8Array;
+    generator: Uint8Array;
+}
+
+interface DhKeyAlgorithm extends KeyAlgorithm {
+    prime: Uint8Array;
+    generator: Uint8Array;
+}
+
+interface DhKeyDeriveParams extends Algorithm {
+    public: CryptoKey;
+}
+
+interface DhImportKeyParams extends Algorithm {
+    prime: Uint8Array;
+    generator: Uint8Array;
+}
+
+interface ConcatParams extends Algorithm {
+    hash?: AlgorithmIdentifier;
+    algorithmId: Uint8Array;
+    partyUInfo: Uint8Array;
+    partyVInfo: Uint8Array;
+    publicInfo?: Uint8Array;
+    privateInfo?: Uint8Array;
+}
+
+interface HkdfCtrParams extends Algorithm {
+    hash: AlgorithmIdentifier;
+    label: BufferSource;
+    context: BufferSource;
+}
+
+interface Pbkdf2Params extends Algorithm {
+    salt: BufferSource;
+    iterations: number;
+    hash: AlgorithmIdentifier;
+}
+
+interface RsaOtherPrimesInfo {
+    r: string;
+    d: string;
+    t: string;
+}
+
+interface JsonWebKey {
+    kty: string;
+    use?: string;
+    key_ops?: string[];
+    alg?: string;
+    kid?: string;
+    x5u?: string;
+    x5c?: string;
+    x5t?: string;
+    ext?: boolean;
+    crv?: string;
+    x?: string;
+    y?: string;
+    d?: string;
+    n?: string;
+    e?: string;
+    p?: string;
+    q?: string;
+    dp?: string;
+    dq?: string;
+    qi?: string;
+    oth?: RsaOtherPrimesInfo[];
+    k?: string;
+}
+
+interface ParentNode {
+    readonly children: HTMLCollection;
+    readonly firstElementChild: Element | null;
+    readonly lastElementChild: Element | null;
+    readonly childElementCount: number;
+}
+
+interface DocumentOrShadowRoot {
+    readonly activeElement: Element | null;
+    readonly stylesheets: StyleSheetList;
+    getSelection(): Selection | null;
+    elementFromPoint(x: number, y: number): Element | null;
+    elementsFromPoint(x: number, y: number): Element[];
+}
+
+interface ShadowRoot extends DocumentOrShadowRoot, DocumentFragment {
+    readonly host: Element;
+    innerHTML: string;
+}
+
+interface ShadowRootInit {
+    mode: "open" | "closed";
+    delegatesFocus?: boolean;
+}
+
+interface HTMLSlotElement extends HTMLElement {
+    name: string;
+    assignedNodes(options?: AssignedNodesOptions): Node[];
+}
+
+interface AssignedNodesOptions {
+    flatten?: boolean;
+}
+
+interface ElementDefinitionOptions {
+    extends: string;
+}
+
+interface CustomElementRegistry {
+    define(name: string, constructor: Function, options?: ElementDefinitionOptions): void;
+    get(name: string): any;
+    whenDefined(name: string): PromiseLike<void>;
+}
+
+interface PromiseRejectionEvent extends Event {
+    readonly promise: PromiseLike<any>;
+    readonly reason: any;
+}
+
+interface PromiseRejectionEventInit extends EventInit {
+    promise: PromiseLike<any>;
+    reason?: any;
+}
+
+interface EventListenerOptions {
+    capture?: boolean;
+}
+
+interface AddEventListenerOptions extends EventListenerOptions {
+    passive?: boolean;
+    once?: boolean;
+}
+
+interface TouchEventInit extends EventModifierInit {
+    touches?: Touch[];
+    targetTouches?: Touch[];
+    changedTouches?: Touch[];
+}
+
+declare type EventListenerOrEventListenerObject = EventListener | EventListenerObject;
+
+interface DecodeErrorCallback {
+    (error: DOMException): void;
+}
+interface DecodeSuccessCallback {
+    (decodedData: AudioBuffer): void;
+}
+interface ErrorEventHandler {
+    (message: string, filename?: string, lineno?: number, colno?: number, error?: Error): void;
+}
+interface ForEachCallback {
+    (keyId: any, status: MediaKeyStatus): void;
+}
+interface FrameRequestCallback {
+    (time: number): void;
+}
+interface FunctionStringCallback {
+    (data: string): void;
+}
+interface IntersectionObserverCallback {
+    (entries: IntersectionObserverEntry[], observer: IntersectionObserver): void;
+}
+interface MediaQueryListListener {
+    (mql: MediaQueryList): void;
+}
+interface MSExecAtPriorityFunctionCallback {
+    (...args: any[]): any;
+}
+interface MSLaunchUriCallback {
+    (): void;
+}
+interface MSUnsafeFunctionCallback {
+    (): any;
+}
+interface MutationCallback {
+    (mutations: MutationRecord[], observer: MutationObserver): void;
+}
+interface NavigatorUserMediaErrorCallback {
+    (error: MediaStreamError): void;
+}
+interface NavigatorUserMediaSuccessCallback {
+    (stream: MediaStream): void;
+}
+interface NotificationPermissionCallback {
+    (permission: NotificationPermission): void;
+}
+interface PositionCallback {
+    (position: Position): void;
+}
+interface PositionErrorCallback {
+    (error: PositionError): void;
+}
+interface RTCPeerConnectionErrorCallback {
+    (error: DOMError): void;
+}
+interface RTCSessionDescriptionCallback {
+    (sdp: RTCSessionDescription): void;
+}
+interface RTCStatsCallback {
+    (report: RTCStatsReport): void;
+}
+interface VoidFunction {
+    (): void;
+}
+interface HTMLElementTagNameMap {
+    "a": HTMLAnchorElement;
+    "applet": HTMLAppletElement;
+    "area": HTMLAreaElement;
+    "audio": HTMLAudioElement;
+    "base": HTMLBaseElement;
+    "basefont": HTMLBaseFontElement;
+    "blockquote": HTMLQuoteElement;
+    "body": HTMLBodyElement;
+    "br": HTMLBRElement;
+    "button": HTMLButtonElement;
+    "canvas": HTMLCanvasElement;
+    "caption": HTMLTableCaptionElement;
+    "col": HTMLTableColElement;
+    "colgroup": HTMLTableColElement;
+    "data": HTMLDataElement;
+    "datalist": HTMLDataListElement;
+    "del": HTMLModElement;
+    "dir": HTMLDirectoryElement;
+    "div": HTMLDivElement;
+    "dl": HTMLDListElement;
+    "embed": HTMLEmbedElement;
+    "fieldset": HTMLFieldSetElement;
+    "font": HTMLFontElement;
+    "form": HTMLFormElement;
+    "frame": HTMLFrameElement;
+    "frameset": HTMLFrameSetElement;
+    "h1": HTMLHeadingElement;
+    "h2": HTMLHeadingElement;
+    "h3": HTMLHeadingElement;
+    "h4": HTMLHeadingElement;
+    "h5": HTMLHeadingElement;
+    "h6": HTMLHeadingElement;
+    "head": HTMLHeadElement;
+    "hr": HTMLHRElement;
+    "html": HTMLHtmlElement;
+    "iframe": HTMLIFrameElement;
+    "img": HTMLImageElement;
+    "input": HTMLInputElement;
+    "ins": HTMLModElement;
+    "isindex": HTMLUnknownElement;
+    "label": HTMLLabelElement;
+    "legend": HTMLLegendElement;
+    "li": HTMLLIElement;
+    "link": HTMLLinkElement;
+    "listing": HTMLPreElement;
+    "map": HTMLMapElement;
+    "marquee": HTMLMarqueeElement;
+    "menu": HTMLMenuElement;
+    "meta": HTMLMetaElement;
+    "meter": HTMLMeterElement;
+    "nextid": HTMLUnknownElement;
+    "object": HTMLObjectElement;
+    "ol": HTMLOListElement;
+    "optgroup": HTMLOptGroupElement;
+    "option": HTMLOptionElement;
+    "output": HTMLOutputElement;
+    "p": HTMLParagraphElement;
+    "param": HTMLParamElement;
+    "picture": HTMLPictureElement;
+    "pre": HTMLPreElement;
+    "progress": HTMLProgressElement;
+    "q": HTMLQuoteElement;
+    "script": HTMLScriptElement;
+    "select": HTMLSelectElement;
+    "source": HTMLSourceElement;
+    "span": HTMLSpanElement;
+    "style": HTMLStyleElement;
+    "table": HTMLTableElement;
+    "tbody": HTMLTableSectionElement;
+    "td": HTMLTableDataCellElement;
+    "template": HTMLTemplateElement;
+    "textarea": HTMLTextAreaElement;
+    "tfoot": HTMLTableSectionElement;
+    "th": HTMLTableHeaderCellElement;
+    "thead": HTMLTableSectionElement;
+    "time": HTMLTimeElement;
+    "title": HTMLTitleElement;
+    "tr": HTMLTableRowElement;
+    "track": HTMLTrackElement;
+    "ul": HTMLUListElement;
+    "video": HTMLVideoElement;
+    "x-ms-webview": MSHTMLWebViewElement;
+    "xmp": HTMLPreElement;
+}
+
+interface ElementTagNameMap extends HTMLElementTagNameMap {
+    "abbr": HTMLElement;
+    "acronym": HTMLElement;
+    "address": HTMLElement;
+    "article": HTMLElement;
+    "aside": HTMLElement;
+    "b": HTMLElement;
+    "bdo": HTMLElement;
+    "big": HTMLElement;
+    "center": HTMLElement;
+    "circle": SVGCircleElement;
+    "cite": HTMLElement;
+    "clippath": SVGClipPathElement;
+    "code": HTMLElement;
+    "dd": HTMLElement;
+    "defs": SVGDefsElement;
+    "desc": SVGDescElement;
+    "dfn": HTMLElement;
+    "dt": HTMLElement;
+    "ellipse": SVGEllipseElement;
+    "em": HTMLElement;
+    "feblend": SVGFEBlendElement;
+    "fecolormatrix": SVGFEColorMatrixElement;
+    "fecomponenttransfer": SVGFEComponentTransferElement;
+    "fecomposite": SVGFECompositeElement;
+    "feconvolvematrix": SVGFEConvolveMatrixElement;
+    "fediffuselighting": SVGFEDiffuseLightingElement;
+    "fedisplacementmap": SVGFEDisplacementMapElement;
+    "fedistantlight": SVGFEDistantLightElement;
+    "feflood": SVGFEFloodElement;
+    "fefunca": SVGFEFuncAElement;
+    "fefuncb": SVGFEFuncBElement;
+    "fefuncg": SVGFEFuncGElement;
+    "fefuncr": SVGFEFuncRElement;
+    "fegaussianblur": SVGFEGaussianBlurElement;
+    "feimage": SVGFEImageElement;
+    "femerge": SVGFEMergeElement;
+    "femergenode": SVGFEMergeNodeElement;
+    "femorphology": SVGFEMorphologyElement;
+    "feoffset": SVGFEOffsetElement;
+    "fepointlight": SVGFEPointLightElement;
+    "fespecularlighting": SVGFESpecularLightingElement;
+    "fespotlight": SVGFESpotLightElement;
+    "fetile": SVGFETileElement;
+    "feturbulence": SVGFETurbulenceElement;
+    "figcaption": HTMLElement;
+    "figure": HTMLElement;
+    "filter": SVGFilterElement;
+    "footer": HTMLElement;
+    "foreignobject": SVGForeignObjectElement;
+    "g": SVGGElement;
+    "header": HTMLElement;
+    "hgroup": HTMLElement;
+    "i": HTMLElement;
+    "image": SVGImageElement;
+    "kbd": HTMLElement;
+    "keygen": HTMLElement;
+    "line": SVGLineElement;
+    "lineargradient": SVGLinearGradientElement;
+    "mark": HTMLElement;
+    "marker": SVGMarkerElement;
+    "mask": SVGMaskElement;
+    "metadata": SVGMetadataElement;
+    "nav": HTMLElement;
+    "nobr": HTMLElement;
+    "noframes": HTMLElement;
+    "noscript": HTMLElement;
+    "path": SVGPathElement;
+    "pattern": SVGPatternElement;
+    "plaintext": HTMLElement;
+    "polygon": SVGPolygonElement;
+    "polyline": SVGPolylineElement;
+    "radialgradient": SVGRadialGradientElement;
+    "rect": SVGRectElement;
+    "rt": HTMLElement;
+    "ruby": HTMLElement;
+    "s": HTMLElement;
+    "samp": HTMLElement;
+    "section": HTMLElement;
+    "small": HTMLElement;
+    "stop": SVGStopElement;
+    "strike": HTMLElement;
+    "strong": HTMLElement;
+    "sub": HTMLElement;
+    "sup": HTMLElement;
+    "svg": SVGSVGElement;
+    "switch": SVGSwitchElement;
+    "symbol": SVGSymbolElement;
+    "text": SVGTextElement;
+    "textpath": SVGTextPathElement;
+    "tspan": SVGTSpanElement;
+    "tt": HTMLElement;
+    "u": HTMLElement;
+    "use": SVGUseElement;
+    "var": HTMLElement;
+    "view": SVGViewElement;
+    "wbr": HTMLElement;
+}
+
+type ElementListTagNameMap = {
+    [key in keyof ElementTagNameMap]: NodeListOf<ElementTagNameMap[key]>
+};
+
+declare var Audio: { new(src?: string): HTMLAudioElement; };
+declare var Image: { new(width?: number, height?: number): HTMLImageElement; };
+declare var Option: { new(text?: string, value?: string, defaultSelected?: boolean, selected?: boolean): HTMLOptionElement; };
+declare var applicationCache: ApplicationCache;
+declare var caches: CacheStorage;
+declare var clientInformation: Navigator;
+declare var closed: boolean;
+declare var crypto: Crypto;
+declare var defaultStatus: string;
+declare var devicePixelRatio: number;
+declare var document: Document;
+declare var doNotTrack: string;
+declare var event: Event | undefined;
+declare var external: External;
+declare var frameElement: Element;
+declare var frames: Window;
+declare var history: History;
+declare var innerHeight: number;
+declare var innerWidth: number;
+declare var isSecureContext: boolean;
+declare var length: number;
+declare var location: Location;
+declare var locationbar: BarProp;
+declare var menubar: BarProp;
+declare var msContentScript: ExtensionScriptApis;
+declare var msCredentials: MSCredentials;
+declare const name: never;
+declare var navigator: Navigator;
+declare var offscreenBuffering: string | boolean;
+declare var onabort: (this: Window, ev: UIEvent) => any;
+declare var onafterprint: (this: Window, ev: Event) => any;
+declare var onbeforeprint: (this: Window, ev: Event) => any;
+declare var onbeforeunload: (this: Window, ev: BeforeUnloadEvent) => any;
+declare var onblur: (this: Window, ev: FocusEvent) => any;
+declare var oncanplay: (this: Window, ev: Event) => any;
+declare var oncanplaythrough: (this: Window, ev: Event) => any;
+declare var onchange: (this: Window, ev: Event) => any;
+declare var onclick: (this: Window, ev: MouseEvent) => any;
+declare var oncompassneedscalibration: (this: Window, ev: Event) => any;
+declare var oncontextmenu: (this: Window, ev: PointerEvent) => any;
+declare var ondblclick: (this: Window, ev: MouseEvent) => any;
+declare var ondevicelight: (this: Window, ev: DeviceLightEvent) => any;
+declare var ondevicemotion: (this: Window, ev: DeviceMotionEvent) => any;
+declare var ondeviceorientation: (this: Window, ev: DeviceOrientationEvent) => any;
+declare var ondrag: (this: Window, ev: DragEvent) => any;
+declare var ondragend: (this: Window, ev: DragEvent) => any;
+declare var ondragenter: (this: Window, ev: DragEvent) => any;
+declare var ondragleave: (this: Window, ev: DragEvent) => any;
+declare var ondragover: (this: Window, ev: DragEvent) => any;
+declare var ondragstart: (this: Window, ev: DragEvent) => any;
+declare var ondrop: (this: Window, ev: DragEvent) => any;
+declare var ondurationchange: (this: Window, ev: Event) => any;
+declare var onemptied: (this: Window, ev: Event) => any;
+declare var onended: (this: Window, ev: MediaStreamErrorEvent) => any;
+declare var onerror: ErrorEventHandler;
+declare var onfocus: (this: Window, ev: FocusEvent) => any;
+declare var onhashchange: (this: Window, ev: HashChangeEvent) => any;
+declare var oninput: (this: Window, ev: Event) => any;
+declare var oninvalid: (this: Window, ev: Event) => any;
+declare var onkeydown: (this: Window, ev: KeyboardEvent) => any;
+declare var onkeypress: (this: Window, ev: KeyboardEvent) => any;
+declare var onkeyup: (this: Window, ev: KeyboardEvent) => any;
+declare var onload: (this: Window, ev: Event) => any;
+declare var onloadeddata: (this: Window, ev: Event) => any;
+declare var onloadedmetadata: (this: Window, ev: Event) => any;
+declare var onloadstart: (this: Window, ev: Event) => any;
+declare var onmessage: (this: Window, ev: MessageEvent) => any;
+declare var onmousedown: (this: Window, ev: MouseEvent) => any;
+declare var onmouseenter: (this: Window, ev: MouseEvent) => any;
+declare var onmouseleave: (this: Window, ev: MouseEvent) => any;
+declare var onmousemove: (this: Window, ev: MouseEvent) => any;
+declare var onmouseout: (this: Window, ev: MouseEvent) => any;
+declare var onmouseover: (this: Window, ev: MouseEvent) => any;
+declare var onmouseup: (this: Window, ev: MouseEvent) => any;
+declare var onmousewheel: (this: Window, ev: WheelEvent) => any;
+declare var onmsgesturechange: (this: Window, ev: MSGestureEvent) => any;
+declare var onmsgesturedoubletap: (this: Window, ev: MSGestureEvent) => any;
+declare var onmsgestureend: (this: Window, ev: MSGestureEvent) => any;
+declare var onmsgesturehold: (this: Window, ev: MSGestureEvent) => any;
+declare var onmsgesturestart: (this: Window, ev: MSGestureEvent) => any;
+declare var onmsgesturetap: (this: Window, ev: MSGestureEvent) => any;
+declare var onmsinertiastart: (this: Window, ev: MSGestureEvent) => any;
+declare var onmspointercancel: (this: Window, ev: MSPointerEvent) => any;
+declare var onmspointerdown: (this: Window, ev: MSPointerEvent) => any;
+declare var onmspointerenter: (this: Window, ev: MSPointerEvent) => any;
+declare var onmspointerleave: (this: Window, ev: MSPointerEvent) => any;
+declare var onmspointermove: (this: Window, ev: MSPointerEvent) => any;
+declare var onmspointerout: (this: Window, ev: MSPointerEvent) => any;
+declare var onmspointerover: (this: Window, ev: MSPointerEvent) => any;
+declare var onmspointerup: (this: Window, ev: MSPointerEvent) => any;
+declare var onoffline: (this: Window, ev: Event) => any;
+declare var ononline: (this: Window, ev: Event) => any;
+declare var onorientationchange: (this: Window, ev: Event) => any;
+declare var onpagehide: (this: Window, ev: PageTransitionEvent) => any;
+declare var onpageshow: (this: Window, ev: PageTransitionEvent) => any;
+declare var onpause: (this: Window, ev: Event) => any;
+declare var onplay: (this: Window, ev: Event) => any;
+declare var onplaying: (this: Window, ev: Event) => any;
+declare var onpopstate: (this: Window, ev: PopStateEvent) => any;
+declare var onprogress: (this: Window, ev: ProgressEvent) => any;
+declare var onratechange: (this: Window, ev: Event) => any;
+declare var onreadystatechange: (this: Window, ev: ProgressEvent) => any;
+declare var onreset: (this: Window, ev: Event) => any;
+declare var onresize: (this: Window, ev: UIEvent) => any;
+declare var onscroll: (this: Window, ev: UIEvent) => any;
+declare var onseeked: (this: Window, ev: Event) => any;
+declare var onseeking: (this: Window, ev: Event) => any;
+declare var onselect: (this: Window, ev: UIEvent) => any;
+declare var onstalled: (this: Window, ev: Event) => any;
+declare var onstorage: (this: Window, ev: StorageEvent) => any;
+declare var onsubmit: (this: Window, ev: Event) => any;
+declare var onsuspend: (this: Window, ev: Event) => any;
+declare var ontimeupdate: (this: Window, ev: Event) => any;
+declare var ontouchcancel: (ev: TouchEvent) => any;
+declare var ontouchend: (ev: TouchEvent) => any;
+declare var ontouchmove: (ev: TouchEvent) => any;
+declare var ontouchstart: (ev: TouchEvent) => any;
+declare var onunload: (this: Window, ev: Event) => any;
+declare var onvolumechange: (this: Window, ev: Event) => any;
+declare var onwaiting: (this: Window, ev: Event) => any;
+declare var opener: any;
+declare var orientation: string | number;
+declare var outerHeight: number;
+declare var outerWidth: number;
+declare var pageXOffset: number;
+declare var pageYOffset: number;
+declare var parent: Window;
+declare var performance: Performance;
+declare var personalbar: BarProp;
+declare var screen: Screen;
+declare var screenLeft: number;
+declare var screenTop: number;
+declare var screenX: number;
+declare var screenY: number;
+declare var scrollbars: BarProp;
+declare var scrollX: number;
+declare var scrollY: number;
+declare var self: Window;
+declare var speechSynthesis: SpeechSynthesis;
+declare var status: string;
+declare var statusbar: BarProp;
+declare var styleMedia: StyleMedia;
+declare var toolbar: BarProp;
+declare var top: Window;
+declare var window: Window;
+declare var customElements: CustomElementRegistry;
+declare function alert(message?: any): void;
+declare function blur(): void;
+declare function cancelAnimationFrame(handle: number): void;
+declare function captureEvents(): void;
+declare function close(): void;
+declare function confirm(message?: string): boolean;
+declare function departFocus(navigationReason: NavigationReason, origin: FocusNavigationOrigin): void;
+declare function focus(): void;
+declare function getComputedStyle(elt: Element, pseudoElt?: string): CSSStyleDeclaration;
+declare function getMatchedCSSRules(elt: Element, pseudoElt?: string): CSSRuleList;
+declare function getSelection(): Selection;
+declare function matchMedia(mediaQuery: string): MediaQueryList;
+declare function moveBy(x?: number, y?: number): void;
+declare function moveTo(x?: number, y?: number): void;
+declare function msWriteProfilerMark(profilerMarkName: string): void;
+declare function open(url?: string, target?: string, features?: string, replace?: boolean): Window;
+declare function postMessage(message: any, targetOrigin: string, transfer?: any[]): void;
+declare function print(): void;
+declare function prompt(message?: string, _default?: string): string | null;
+declare function releaseEvents(): void;
+declare function requestAnimationFrame(callback: FrameRequestCallback): number;
+declare function resizeBy(x?: number, y?: number): void;
+declare function resizeTo(x?: number, y?: number): void;
+declare function scroll(x?: number, y?: number): void;
+declare function scrollBy(x?: number, y?: number): void;
+declare function scrollTo(x?: number, y?: number): void;
+declare function stop(): void;
+declare function webkitCancelAnimationFrame(handle: number): void;
+declare function webkitConvertPointFromNodeToPage(node: Node, pt: WebKitPoint): WebKitPoint;
+declare function webkitConvertPointFromPageToNode(node: Node, pt: WebKitPoint): WebKitPoint;
+declare function webkitRequestAnimationFrame(callback: FrameRequestCallback): number;
+declare function createImageBitmap(image: HTMLImageElement | SVGImageElement | HTMLVideoElement | HTMLCanvasElement | ImageBitmap | ImageData | Blob, options?: ImageBitmapOptions): Promise<ImageBitmap>;
+declare function createImageBitmap(image: HTMLImageElement | SVGImageElement | HTMLVideoElement | HTMLCanvasElement | ImageBitmap | ImageData | Blob, sx: number, sy: number, sw: number, sh: number, options?: ImageBitmapOptions): Promise<ImageBitmap>;
+declare function scroll(options?: ScrollToOptions): void;
+declare function scrollTo(options?: ScrollToOptions): void;
+declare function scrollBy(options?: ScrollToOptions): void;
+declare function toString(): string;
+declare function dispatchEvent(evt: Event): boolean;
+declare function removeEventListener(type: string, listener?: EventListenerOrEventListenerObject, options?: boolean | EventListenerOptions): void;
+declare function clearInterval(handle: number): void;
+declare function clearTimeout(handle: number): void;
+declare function setInterval(handler: (...args: any[]) => void, timeout: number): number;
+declare function setInterval(handler: any, timeout?: any, ...args: any[]): number;
+declare function setTimeout(handler: (...args: any[]) => void, timeout: number): number;
+declare function setTimeout(handler: any, timeout?: any, ...args: any[]): number;
+declare function clearImmediate(handle: number): void;
+declare function setImmediate(handler: (...args: any[]) => void): number;
+declare function setImmediate(handler: any, ...args: any[]): number;
+declare var sessionStorage: Storage;
+declare var localStorage: Storage;
+declare var console: Console;
+declare var onpointercancel: (this: Window, ev: PointerEvent) => any;
+declare var onpointerdown: (this: Window, ev: PointerEvent) => any;
+declare var onpointerenter: (this: Window, ev: PointerEvent) => any;
+declare var onpointerleave: (this: Window, ev: PointerEvent) => any;
+declare var onpointermove: (this: Window, ev: PointerEvent) => any;
+declare var onpointerout: (this: Window, ev: PointerEvent) => any;
+declare var onpointerover: (this: Window, ev: PointerEvent) => any;
+declare var onpointerup: (this: Window, ev: PointerEvent) => any;
+declare var onwheel: (this: Window, ev: WheelEvent) => any;
+declare var indexedDB: IDBFactory;
+declare function atob(encodedString: string): string;
+declare function btoa(rawString: string): string;
+declare function fetch(input: RequestInfo, init?: RequestInit): Promise<Response>;
+declare function addEventListener<K extends keyof WindowEventMap>(type: K, listener: (this: Window, ev: WindowEventMap[K]) => any, useCapture?: boolean): void;
+declare function addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+type AAGUID = string;
+type AlgorithmIdentifier = string | Algorithm;
+type BodyInit = any;
+type ByteString = string;
+type ConstrainBoolean = boolean | ConstrainBooleanParameters;
+type ConstrainDOMString = string | string[] | ConstrainDOMStringParameters;
+type ConstrainDouble = number | ConstrainDoubleRange;
+type ConstrainLong = number | ConstrainLongRange;
+type CryptoOperationData = ArrayBufferView;
+type GLbitfield = number;
+type GLboolean = boolean;
+type GLbyte = number;
+type GLclampf = number;
+type GLenum = number;
+type GLfloat = number;
+type GLint = number;
+type GLintptr = number;
+type GLshort = number;
+type GLsizei = number;
+type GLsizeiptr = number;
+type GLubyte = number;
+type GLuint = number;
+type GLushort = number;
+type HeadersInit = any;
+type IDBKeyPath = string;
+type KeyFormat = string;
+type KeyType = string;
+type KeyUsage = string;
+type MSInboundPayload = MSVideoRecvPayload | MSAudioRecvPayload;
+type MSLocalClientEvent = MSLocalClientEventBase | MSAudioLocalClientEvent;
+type MSOutboundPayload = MSVideoSendPayload | MSAudioSendPayload;
+type RTCIceGatherCandidate = RTCIceCandidateDictionary | RTCIceCandidateComplete;
+type RTCTransport = RTCDtlsTransport | RTCSrtpSdesTransport;
+type RequestInfo = Request | string;
+type USVString = string;
+type payloadtype = number;
+type ScrollBehavior = "auto" | "instant" | "smooth";
+type ScrollLogicalPosition = "start" | "center" | "end" | "nearest";
+type IDBValidKey = number | string | Date | IDBArrayKey;
+type BufferSource = ArrayBuffer | ArrayBufferView;
+type MouseWheelEvent = WheelEvent;
+type ScrollRestoration = "auto" | "manual";
+type FormDataEntryValue = string | File;
+type InsertPosition = "beforebegin" | "afterbegin" | "beforeend" | "afterend";
+type AppendMode = "segments" | "sequence";
+type AudioContextState = "suspended" | "running" | "closed";
+type BiquadFilterType = "lowpass" | "highpass" | "bandpass" | "lowshelf" | "highshelf" | "peaking" | "notch" | "allpass";
+type CanvasFillRule = "nonzero" | "evenodd";
+type ChannelCountMode = "max" | "clamped-max" | "explicit";
+type ChannelInterpretation = "speakers" | "discrete";
+type DistanceModelType = "linear" | "inverse" | "exponential";
+type ExpandGranularity = "character" | "word" | "sentence" | "textedit";
+type GamepadInputEmulationType = "mouse" | "keyboard" | "gamepad";
+type IDBCursorDirection = "next" | "nextunique" | "prev" | "prevunique";
+type IDBRequestReadyState = "pending" | "done";
+type IDBTransactionMode = "readonly" | "readwrite" | "versionchange";
+type ListeningState = "inactive" | "active" | "disambiguation";
+type MediaDeviceKind = "audioinput" | "audiooutput" | "videoinput";
+type MediaKeyMessageType = "license-request" | "license-renewal" | "license-release" | "individualization-request";
+type MediaKeySessionType = "temporary" | "persistent-license" | "persistent-release-message";
+type MediaKeysRequirement = "required" | "optional" | "not-allowed";
+type MediaKeyStatus = "usable" | "expired" | "output-downscaled" | "output-not-allowed" | "status-pending" | "internal-error";
+type MediaStreamTrackState = "live" | "ended";
+type MSCredentialType = "FIDO_2_0";
+type MSIceAddrType = "os" | "stun" | "turn" | "peer-derived";
+type MSIceType = "failed" | "direct" | "relay";
+type MSStatsType = "description" | "localclientevent" | "inbound-network" | "outbound-network" | "inbound-payload" | "outbound-payload" | "transportdiagnostics";
+type MSTransportType = "Embedded" | "USB" | "NFC" | "BT";
+type MSWebViewPermissionState = "unknown" | "defer" | "allow" | "deny";
+type MSWebViewPermissionType = "geolocation" | "unlimitedIndexedDBQuota" | "media" | "pointerlock" | "webnotifications";
+type NavigationReason = "up" | "down" | "left" | "right";
+type NavigationType = "navigate" | "reload" | "back_forward" | "prerender";
+type NotificationDirection = "auto" | "ltr" | "rtl";
+type NotificationPermission = "default" | "denied" | "granted";
+type OscillatorType = "sine" | "square" | "sawtooth" | "triangle" | "custom";
+type OverSampleType = "none" | "2x" | "4x";
+type PanningModelType = "equalpower";
+type PaymentComplete = "success" | "fail" | "";
+type PaymentShippingType = "shipping" | "delivery" | "pickup";
+type PushEncryptionKeyName = "p256dh" | "auth";
+type PushPermissionState = "granted" | "denied" | "prompt";
+type ReferrerPolicy = "" | "no-referrer" | "no-referrer-when-downgrade" | "origin-only" | "origin-when-cross-origin" | "unsafe-url";
+type RequestCache = "default" | "no-store" | "reload" | "no-cache" | "force-cache";
+type RequestCredentials = "omit" | "same-origin" | "include";
+type RequestDestination = "" | "document" | "sharedworker" | "subresource" | "unknown" | "worker";
+type RequestMode = "navigate" | "same-origin" | "no-cors" | "cors";
+type RequestRedirect = "follow" | "error" | "manual";
+type RequestType = "" | "audio" | "font" | "image" | "script" | "style" | "track" | "video";
+type ResponseType = "basic" | "cors" | "default" | "error" | "opaque" | "opaqueredirect";
+type RTCBundlePolicy = "balanced" | "max-compat" | "max-bundle";
+type RTCDegradationPreference = "maintain-framerate" | "maintain-resolution" | "balanced";
+type RTCDtlsRole = "auto" | "client" | "server";
+type RTCDtlsTransportState = "new" | "connecting" | "connected" | "closed";
+type RTCIceCandidateType = "host" | "srflx" | "prflx" | "relay";
+type RTCIceComponent = "RTP" | "RTCP";
+type RTCIceConnectionState = "new" | "checking" | "connected" | "completed" | "failed" | "disconnected" | "closed";
+type RTCIceGathererState = "new" | "gathering" | "complete";
+type RTCIceGatheringState = "new" | "gathering" | "complete";
+type RTCIceGatherPolicy = "all" | "nohost" | "relay";
+type RTCIceProtocol = "udp" | "tcp";
+type RTCIceRole = "controlling" | "controlled";
+type RTCIceTcpCandidateType = "active" | "passive" | "so";
+type RTCIceTransportPolicy = "none" | "relay" | "all";
+type RTCIceTransportState = "new" | "checking" | "connected" | "completed" | "disconnected" | "closed";
+type RTCSdpType = "offer" | "pranswer" | "answer";
+type RTCSignalingState = "stable" | "have-local-offer" | "have-remote-offer" | "have-local-pranswer" | "have-remote-pranswer" | "closed";
+type RTCStatsIceCandidatePairState = "frozen" | "waiting" | "inprogress" | "failed" | "succeeded" | "cancelled";
+type RTCStatsIceCandidateType = "host" | "serverreflexive" | "peerreflexive" | "relayed";
+type RTCStatsType = "inboundrtp" | "outboundrtp" | "session" | "datachannel" | "track" | "transport" | "candidatepair" | "localcandidate" | "remotecandidate";
+type ScopedCredentialType = "ScopedCred";
+type ServiceWorkerState = "installing" | "installed" | "activating" | "activated" | "redundant";
+type Transport = "usb" | "nfc" | "ble";
+type VideoFacingModeEnum = "user" | "environment" | "left" | "right";
+type VisibilityState = "hidden" | "visible" | "prerender" | "unloaded";
+type XMLHttpRequestResponseType = "" | "arraybuffer" | "blob" | "document" | "json" | "text";
+
+
+/////////////////////////////
+/// WorkerGlobalScope APIs
+/////////////////////////////
+// These are only available in a Web Worker
+declare function importScripts(...urls: string[]): void;
+
+
+
+
+/////////////////////////////
+/// Windows Script Host APIS
+/////////////////////////////
+
+
+interface ActiveXObject {
+    new (s: string): any;
+}
+declare var ActiveXObject: ActiveXObject;
+
+interface ITextWriter {
+    Write(s: string): void;
+    WriteLine(s: string): void;
+    Close(): void;
+}
+
+interface TextStreamBase {
+    /**
+     * The column number of the current character position in an input stream.
+     */
+    Column: number;
+
+    /**
+     * The current line number in an input stream.
+     */
+    Line: number;
+
+    /**
+     * Closes a text stream.
+     * It is not necessary to close standard streams; they close automatically when the process ends. If
+     * you close a standard stream, be aware that any other pointers to that standard stream become invalid.
+     */
+    Close(): void;
+}
+
+interface TextStreamWriter extends TextStreamBase {
+    /**
+     * Sends a string to an output stream.
+     */
+    Write(s: string): void;
+
+    /**
+     * Sends a specified number of blank lines (newline characters) to an output stream.
+     */
+    WriteBlankLines(intLines: number): void;
+
+    /**
+     * Sends a string followed by a newline character to an output stream.
+     */
+    WriteLine(s: string): void;
+}
+
+interface TextStreamReader extends TextStreamBase {
+    /**
+     * Returns a specified number of characters from an input stream, starting at the current pointer position.
+     * Does not return until the ENTER key is pressed.
+     * Can only be used on a stream in reading mode; causes an error in writing or appending mode.
+     */
+    Read(characters: number): string;
+
+    /**
+     * Returns all characters from an input stream.
+     * Can only be used on a stream in reading mode; causes an error in writing or appending mode.
+     */
+    ReadAll(): string;
+
+    /**
+     * Returns an entire line from an input stream.
+     * Although this method extracts the newline character, it does not add it to the returned string.
+     * Can only be used on a stream in reading mode; causes an error in writing or appending mode.
+     */
+    ReadLine(): string;
+
+    /**
+     * Skips a specified number of characters when reading from an input text stream.
+     * Can only be used on a stream in reading mode; causes an error in writing or appending mode.
+     * @param characters Positive number of characters to skip forward. (Backward skipping is not supported.)
+     */
+    Skip(characters: number): void;
+
+    /**
+     * Skips the next line when reading from an input text stream.
+     * Can only be used on a stream in reading mode, not writing or appending mode.
+     */
+    SkipLine(): void;
+
+    /**
+     * Indicates whether the stream pointer position is at the end of a line.
+     */
+    AtEndOfLine: boolean;
+
+    /**
+     * Indicates whether the stream pointer position is at the end of a stream.
+     */
+    AtEndOfStream: boolean;
+}
+
+declare var WScript: {
+    /**
+     * Outputs text to either a message box (under WScript.exe) or the command console window followed by
+     * a newline (under CScript.exe).
+     */
+    Echo(s: any): void;
+
+    /**
+     * Exposes the write-only error output stream for the current script.
+     * Can be accessed only while using CScript.exe.
+     */
+    StdErr: TextStreamWriter;
+
+    /**
+     * Exposes the write-only output stream for the current script.
+     * Can be accessed only while using CScript.exe.
+     */
+    StdOut: TextStreamWriter;
+    Arguments: { length: number; Item(n: number): string; };
+
+    /**
+     *  The full path of the currently running script.
+     */
+    ScriptFullName: string;
+
+    /**
+     * Forces the script to stop immediately, with an optional exit code.
+     */
+    Quit(exitCode?: number): number;
+
+    /**
+     * The Windows Script Host build version number.
+     */
+    BuildVersion: number;
+
+    /**
+     * Fully qualified path of the host executable.
+     */
+    FullName: string;
+
+    /**
+     * Gets/sets the script mode - interactive(true) or batch(false).
+     */
+    Interactive: boolean;
+
+    /**
+     * The name of the host executable (WScript.exe or CScript.exe).
+     */
+    Name: string;
+
+    /**
+     * Path of the directory containing the host executable.
+     */
+    Path: string;
+
+    /**
+     * The filename of the currently running script.
+     */
+    ScriptName: string;
+
+    /**
+     * Exposes the read-only input stream for the current script.
+     * Can be accessed only while using CScript.exe.
+     */
+    StdIn: TextStreamReader;
+
+    /**
+     * Windows Script Host version
+     */
+    Version: string;
+
+    /**
+     * Connects a COM object's event sources to functions named with a given prefix, in the form prefix_event.
+     */
+    ConnectObject(objEventSource: any, strPrefix: string): void;
+
+    /**
+     * Creates a COM object.
+     * @param strProgiID
+     * @param strPrefix Function names in the form prefix_event will be bound to this object's COM events.
+     */
+    CreateObject(strProgID: string, strPrefix?: string): any;
+
+    /**
+     * Disconnects a COM object from its event sources.
+     */
+    DisconnectObject(obj: any): void;
+
+    /**
+     * Retrieves an existing object with the specified ProgID from memory, or creates a new one from a file.
+     * @param strPathname Fully qualified path to the file containing the object persisted to disk.
+     *                       For objects in memory, pass a zero-length string.
+     * @param strProgID
+     * @param strPrefix Function names in the form prefix_event will be bound to this object's COM events.
+     */
+    GetObject(strPathname: string, strProgID?: string, strPrefix?: string): any;
+
+    /**
+     * Suspends script execution for a specified length of time, then continues execution.
+     * @param intTime Interval (in milliseconds) to suspend script execution.
+     */
+    Sleep(intTime: number): void;
+};
+
+/**
+ * Allows enumerating over a COM collection, which may not have indexed item access.
+ */
+interface Enumerator<T> {
+    /**
+     * Returns true if the current item is the last one in the collection, or the collection is empty,
+     * or the current item is undefined.
+     */
+    atEnd(): boolean;
+
+    /**
+     * Returns the current item in the collection
+     */
+    item(): T;
+
+    /**
+     * Resets the current item in the collection to the first item. If there are no items in the collection,
+     * the current item is set to undefined.
+     */
+    moveFirst(): void;
+
+    /**
+     * Moves the current item to the next item in the collection. If the enumerator is at the end of
+     * the collection or the collection is empty, the current item is set to undefined.
+     */
+    moveNext(): void;
+}
+
+interface EnumeratorConstructor {
+    new <T>(collection: any): Enumerator<T>;
+    new (collection: any): Enumerator<any>;
+}
+
+declare var Enumerator: EnumeratorConstructor;
+
+/**
+ * Enables reading from a COM safe array, which might have an alternate lower bound, or multiple dimensions.
+ */
+interface VBArray<T> {
+    /**
+     * Returns the number of dimensions (1-based).
+     */
+    dimensions(): number;
+
+    /**
+     * Takes an index for each dimension in the array, and returns the item at the corresponding location.
+     */
+    getItem(dimension1Index: number, ...dimensionNIndexes: number[]): T;
+
+    /**
+     * Returns the smallest available index for a given dimension.
+     * @param dimension 1-based dimension (defaults to 1)
+     */
+    lbound(dimension?: number): number;
+
+    /**
+     * Returns the largest available index for a given dimension.
+     * @param dimension 1-based dimension (defaults to 1)
+     */
+    ubound(dimension?: number): number;
+
+    /**
+     * Returns a Javascript array with all the elements in the VBArray. If there are multiple dimensions,
+     * each successive dimension is appended to the end of the array.
+     * Example: [[1,2,3],[4,5,6]] becomes [1,2,3,4,5,6]
+     */
+    toArray(): T[];
+}
+
+interface VBArrayConstructor {
+    new <T>(safeArray: any): VBArray<T>;
+    new (safeArray: any): VBArray<any>;
+}
+
+declare var VBArray: VBArrayConstructor;
+
+/**
+ * Automation date (VT_DATE)
+ */
+interface VarDate { }
+
+interface DateConstructor {
+    new (vd: VarDate): Date;
+}
+
+interface Date {
+    getVarDate: () => VarDate;
+}
diff --git a/bin/lib.dom.d.ts b/bin/lib.dom.d.ts
index 4c19c87..c96d546 100644
--- a/bin/lib.dom.d.ts
+++ b/bin/lib.dom.d.ts
@@ -1,14642 +1,14804 @@
-/*! *****************************************************************************
-Copyright (c) Microsoft Corporation. All rights reserved. 
-Licensed under the Apache License, Version 2.0 (the "License"); you may not use
-this file except in compliance with the License. You may obtain a copy of the
-License at http://www.apache.org/licenses/LICENSE-2.0  
- 
-THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
-WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
-MERCHANTABLITY OR NON-INFRINGEMENT. 
- 
-See the Apache Version 2.0 License for specific language governing permissions
-and limitations under the License.
-***************************************************************************** */
-
-/// <reference no-default-lib="true"/>
-
-/////////////////////////////
-/// IE DOM APIs
-/////////////////////////////
-
-interface Algorithm {
-    name: string;
-}
-
-interface AriaRequestEventInit extends EventInit {
-    attributeName?: string;
-    attributeValue?: string;
-}
-
-interface CommandEventInit extends EventInit {
-    commandName?: string;
-    detail?: string;
-}
-
-interface CompositionEventInit extends UIEventInit {
-    data?: string;
-}
-
-interface ConfirmSiteSpecificExceptionsInformation extends ExceptionInformation {
-    arrayOfDomainStrings?: string[];
-}
-
-interface ConstrainBooleanParameters {
-    exact?: boolean;
-    ideal?: boolean;
-}
-
-interface ConstrainDOMStringParameters {
-    exact?: string | string[];
-    ideal?: string | string[];
-}
-
-interface ConstrainDoubleRange extends DoubleRange {
-    exact?: number;
-    ideal?: number;
-}
-
-interface ConstrainLongRange extends LongRange {
-    exact?: number;
-    ideal?: number;
-}
-
-interface ConstrainVideoFacingModeParameters {
-    exact?: string | string[];
-    ideal?: string | string[];
-}
-
-interface CustomEventInit extends EventInit {
-    detail?: any;
-}
-
-interface DeviceAccelerationDict {
-    x?: number;
-    y?: number;
-    z?: number;
-}
-
-interface DeviceLightEventInit extends EventInit {
-    value?: number;
-}
-
-interface DeviceRotationRateDict {
-    alpha?: number;
-    beta?: number;
-    gamma?: number;
-}
-
-interface DoubleRange {
-    max?: number;
-    min?: number;
-}
-
-interface EventInit {
-    bubbles?: boolean;
-    cancelable?: boolean;
-}
-
-interface EventModifierInit extends UIEventInit {
-    ctrlKey?: boolean;
-    shiftKey?: boolean;
-    altKey?: boolean;
-    metaKey?: boolean;
-    modifierAltGraph?: boolean;
-    modifierCapsLock?: boolean;
-    modifierFn?: boolean;
-    modifierFnLock?: boolean;
-    modifierHyper?: boolean;
-    modifierNumLock?: boolean;
-    modifierOS?: boolean;
-    modifierScrollLock?: boolean;
-    modifierSuper?: boolean;
-    modifierSymbol?: boolean;
-    modifierSymbolLock?: boolean;
-}
-
-interface ExceptionInformation {
-    domain?: string;
-}
-
-interface FocusEventInit extends UIEventInit {
-    relatedTarget?: EventTarget;
-}
-
-interface HashChangeEventInit extends EventInit {
-    newURL?: string;
-    oldURL?: string;
-}
-
-interface IDBIndexParameters {
-    multiEntry?: boolean;
-    unique?: boolean;
-}
-
-interface IDBObjectStoreParameters {
-    autoIncrement?: boolean;
-    keyPath?: IDBKeyPath;
-}
-
-interface KeyAlgorithm {
-    name?: string;
-}
-
-interface KeyboardEventInit extends EventModifierInit {
-    code?: string;
-    key?: string;
-    location?: number;
-    repeat?: boolean;
-}
-
-interface LongRange {
-    max?: number;
-    min?: number;
-}
-
-interface MSAccountInfo {
-    rpDisplayName?: string;
-    userDisplayName?: string;
-    accountName?: string;
-    userId?: string;
-    accountImageUri?: string;
-}
-
-interface MSAudioLocalClientEvent extends MSLocalClientEventBase {
-    networkSendQualityEventRatio?: number;
-    networkDelayEventRatio?: number;
-    cpuInsufficientEventRatio?: number;
-    deviceHalfDuplexAECEventRatio?: number;
-    deviceRenderNotFunctioningEventRatio?: number;
-    deviceCaptureNotFunctioningEventRatio?: number;
-    deviceGlitchesEventRatio?: number;
-    deviceLowSNREventRatio?: number;
-    deviceLowSpeechLevelEventRatio?: number;
-    deviceClippingEventRatio?: number;
-    deviceEchoEventRatio?: number;
-    deviceNearEndToEchoRatioEventRatio?: number;
-    deviceRenderZeroVolumeEventRatio?: number;
-    deviceRenderMuteEventRatio?: number;
-    deviceMultipleEndpointsEventCount?: number;
-    deviceHowlingEventCount?: number;
-}
-
-interface MSAudioRecvPayload extends MSPayloadBase {
-    samplingRate?: number;
-    signal?: MSAudioRecvSignal;
-    packetReorderRatio?: number;
-    packetReorderDepthAvg?: number;
-    packetReorderDepthMax?: number;
-    burstLossLength1?: number;
-    burstLossLength2?: number;
-    burstLossLength3?: number;
-    burstLossLength4?: number;
-    burstLossLength5?: number;
-    burstLossLength6?: number;
-    burstLossLength7?: number;
-    burstLossLength8OrHigher?: number;
-    fecRecvDistance1?: number;
-    fecRecvDistance2?: number;
-    fecRecvDistance3?: number;
-    ratioConcealedSamplesAvg?: number;
-    ratioStretchedSamplesAvg?: number;
-    ratioCompressedSamplesAvg?: number;
-}
-
-interface MSAudioRecvSignal {
-    initialSignalLevelRMS?: number;
-    recvSignalLevelCh1?: number;
-    recvNoiseLevelCh1?: number;
-    renderSignalLevel?: number;
-    renderNoiseLevel?: number;
-    renderLoopbackSignalLevel?: number;
-}
-
-interface MSAudioSendPayload extends MSPayloadBase {
-    samplingRate?: number;
-    signal?: MSAudioSendSignal;
-    audioFECUsed?: boolean;
-    sendMutePercent?: number;
-}
-
-interface MSAudioSendSignal {
-    noiseLevel?: number;
-    sendSignalLevelCh1?: number;
-    sendNoiseLevelCh1?: number;
-}
-
-interface MSConnectivity {
-    iceType?: string;
-    iceWarningFlags?: MSIceWarningFlags;
-    relayAddress?: MSRelayAddress;
-}
-
-interface MSCredentialFilter {
-    accept?: MSCredentialSpec[];
-}
-
-interface MSCredentialParameters {
-    type?: string;
-}
-
-interface MSCredentialSpec {
-    type?: string;
-    id?: string;
-}
-
-interface MSDelay {
-    roundTrip?: number;
-    roundTripMax?: number;
-}
-
-interface MSDescription extends RTCStats {
-    connectivity?: MSConnectivity;
-    transport?: string;
-    networkconnectivity?: MSNetworkConnectivityInfo;
-    localAddr?: MSIPAddressInfo;
-    remoteAddr?: MSIPAddressInfo;
-    deviceDevName?: string;
-    reflexiveLocalIPAddr?: MSIPAddressInfo;
-}
-
-interface MSFIDOCredentialParameters extends MSCredentialParameters {
-    algorithm?: string | Algorithm;
-    authenticators?: AAGUID[];
-}
-
-interface MSIPAddressInfo {
-    ipAddr?: string;
-    port?: number;
-    manufacturerMacAddrMask?: string;
-}
-
-interface MSIceWarningFlags {
-    turnTcpTimedOut?: boolean;
-    turnUdpAllocateFailed?: boolean;
-    turnUdpSendFailed?: boolean;
-    turnTcpAllocateFailed?: boolean;
-    turnTcpSendFailed?: boolean;
-    udpLocalConnectivityFailed?: boolean;
-    udpNatConnectivityFailed?: boolean;
-    udpRelayConnectivityFailed?: boolean;
-    tcpNatConnectivityFailed?: boolean;
-    tcpRelayConnectivityFailed?: boolean;
-    connCheckMessageIntegrityFailed?: boolean;
-    allocationMessageIntegrityFailed?: boolean;
-    connCheckOtherError?: boolean;
-    turnAuthUnknownUsernameError?: boolean;
-    noRelayServersConfigured?: boolean;
-    multipleRelayServersAttempted?: boolean;
-    portRangeExhausted?: boolean;
-    alternateServerReceived?: boolean;
-    pseudoTLSFailure?: boolean;
-    turnTurnTcpConnectivityFailed?: boolean;
-    useCandidateChecksFailed?: boolean;
-    fipsAllocationFailure?: boolean;
-}
-
-interface MSJitter {
-    interArrival?: number;
-    interArrivalMax?: number;
-    interArrivalSD?: number;
-}
-
-interface MSLocalClientEventBase extends RTCStats {
-    networkReceiveQualityEventRatio?: number;
-    networkBandwidthLowEventRatio?: number;
-}
-
-interface MSNetwork extends RTCStats {
-    jitter?: MSJitter;
-    delay?: MSDelay;
-    packetLoss?: MSPacketLoss;
-    utilization?: MSUtilization;
-}
-
-interface MSNetworkConnectivityInfo {
-    vpn?: boolean;
-    linkspeed?: number;
-    networkConnectionDetails?: string;
-}
-
-interface MSNetworkInterfaceType {
-    interfaceTypeEthernet?: boolean;
-    interfaceTypeWireless?: boolean;
-    interfaceTypePPP?: boolean;
-    interfaceTypeTunnel?: boolean;
-    interfaceTypeWWAN?: boolean;
-}
-
-interface MSOutboundNetwork extends MSNetwork {
-    appliedBandwidthLimit?: number;
-}
-
-interface MSPacketLoss {
-    lossRate?: number;
-    lossRateMax?: number;
-}
-
-interface MSPayloadBase extends RTCStats {
-    payloadDescription?: string;
-}
-
-interface MSRelayAddress {
-    relayAddress?: string;
-    port?: number;
-}
-
-interface MSSignatureParameters {
-    userPrompt?: string;
-}
-
-interface MSTransportDiagnosticsStats extends RTCStats {
-    baseAddress?: string;
-    localAddress?: string;
-    localSite?: string;
-    networkName?: string;
-    remoteAddress?: string;
-    remoteSite?: string;
-    localMR?: string;
-    remoteMR?: string;
-    iceWarningFlags?: MSIceWarningFlags;
-    portRangeMin?: number;
-    portRangeMax?: number;
-    localMRTCPPort?: number;
-    remoteMRTCPPort?: number;
-    stunVer?: number;
-    numConsentReqSent?: number;
-    numConsentReqReceived?: number;
-    numConsentRespSent?: number;
-    numConsentRespReceived?: number;
-    interfaces?: MSNetworkInterfaceType;
-    baseInterface?: MSNetworkInterfaceType;
-    protocol?: string;
-    localInterface?: MSNetworkInterfaceType;
-    localAddrType?: string;
-    remoteAddrType?: string;
-    iceRole?: string;
-    rtpRtcpMux?: boolean;
-    allocationTimeInMs?: number;
-    msRtcEngineVersion?: string;
-}
-
-interface MSUtilization {
-    packets?: number;
-    bandwidthEstimation?: number;
-    bandwidthEstimationMin?: number;
-    bandwidthEstimationMax?: number;
-    bandwidthEstimationStdDev?: number;
-    bandwidthEstimationAvg?: number;
-}
-
-interface MSVideoPayload extends MSPayloadBase {
-    resoluton?: string;
-    videoBitRateAvg?: number;
-    videoBitRateMax?: number;
-    videoFrameRateAvg?: number;
-    videoPacketLossRate?: number;
-    durationSeconds?: number;
-}
-
-interface MSVideoRecvPayload extends MSVideoPayload {
-    videoFrameLossRate?: number;
-    recvCodecType?: string;
-    recvResolutionWidth?: number;
-    recvResolutionHeight?: number;
-    videoResolutions?: MSVideoResolutionDistribution;
-    recvFrameRateAverage?: number;
-    recvBitRateMaximum?: number;
-    recvBitRateAverage?: number;
-    recvVideoStreamsMax?: number;
-    recvVideoStreamsMin?: number;
-    recvVideoStreamsMode?: number;
-    videoPostFECPLR?: number;
-    lowBitRateCallPercent?: number;
-    lowFrameRateCallPercent?: number;
-    reorderBufferTotalPackets?: number;
-    recvReorderBufferReorderedPackets?: number;
-    recvReorderBufferPacketsDroppedDueToBufferExhaustion?: number;
-    recvReorderBufferMaxSuccessfullyOrderedExtent?: number;
-    recvReorderBufferMaxSuccessfullyOrderedLateTime?: number;
-    recvReorderBufferPacketsDroppedDueToTimeout?: number;
-    recvFpsHarmonicAverage?: number;
-    recvNumResSwitches?: number;
-}
-
-interface MSVideoResolutionDistribution {
-    cifQuality?: number;
-    vgaQuality?: number;
-    h720Quality?: number;
-    h1080Quality?: number;
-    h1440Quality?: number;
-    h2160Quality?: number;
-}
-
-interface MSVideoSendPayload extends MSVideoPayload {
-    sendFrameRateAverage?: number;
-    sendBitRateMaximum?: number;
-    sendBitRateAverage?: number;
-    sendVideoStreamsMax?: number;
-    sendResolutionWidth?: number;
-    sendResolutionHeight?: number;
-}
-
-interface MediaEncryptedEventInit extends EventInit {
-    initDataType?: string;
-    initData?: ArrayBuffer;
-}
-
-interface MediaKeyMessageEventInit extends EventInit {
-    messageType?: string;
-    message?: ArrayBuffer;
-}
-
-interface MediaKeySystemConfiguration {
-    initDataTypes?: string[];
-    audioCapabilities?: MediaKeySystemMediaCapability[];
-    videoCapabilities?: MediaKeySystemMediaCapability[];
-    distinctiveIdentifier?: string;
-    persistentState?: string;
-}
-
-interface MediaKeySystemMediaCapability {
-    contentType?: string;
-    robustness?: string;
-}
-
-interface MediaStreamConstraints {
-    video?: boolean | MediaTrackConstraints;
-    audio?: boolean | MediaTrackConstraints;
-}
-
-interface MediaStreamErrorEventInit extends EventInit {
-    error?: MediaStreamError;
-}
-
-interface MediaStreamTrackEventInit extends EventInit {
-    track?: MediaStreamTrack;
-}
-
-interface MediaTrackCapabilities {
-    width?: number | LongRange;
-    height?: number | LongRange;
-    aspectRatio?: number | DoubleRange;
-    frameRate?: number | DoubleRange;
-    facingMode?: string;
-    volume?: number | DoubleRange;
-    sampleRate?: number | LongRange;
-    sampleSize?: number | LongRange;
-    echoCancellation?: boolean[];
-    deviceId?: string;
-    groupId?: string;
-}
-
-interface MediaTrackConstraintSet {
-    width?: number | ConstrainLongRange;
-    height?: number | ConstrainLongRange;
-    aspectRatio?: number | ConstrainDoubleRange;
-    frameRate?: number | ConstrainDoubleRange;
-    facingMode?: string | string[] | ConstrainDOMStringParameters;
-    volume?: number | ConstrainDoubleRange;
-    sampleRate?: number | ConstrainLongRange;
-    sampleSize?: number | ConstrainLongRange;
-    echoCancelation?: boolean | ConstrainBooleanParameters;
-    deviceId?: string | string[] | ConstrainDOMStringParameters;
-    groupId?: string | string[] | ConstrainDOMStringParameters;
-}
-
-interface MediaTrackConstraints extends MediaTrackConstraintSet {
-    advanced?: MediaTrackConstraintSet[];
-}
-
-interface MediaTrackSettings {
-    width?: number;
-    height?: number;
-    aspectRatio?: number;
-    frameRate?: number;
-    facingMode?: string;
-    volume?: number;
-    sampleRate?: number;
-    sampleSize?: number;
-    echoCancellation?: boolean;
-    deviceId?: string;
-    groupId?: string;
-}
-
-interface MediaTrackSupportedConstraints {
-    width?: boolean;
-    height?: boolean;
-    aspectRatio?: boolean;
-    frameRate?: boolean;
-    facingMode?: boolean;
-    volume?: boolean;
-    sampleRate?: boolean;
-    sampleSize?: boolean;
-    echoCancellation?: boolean;
-    deviceId?: boolean;
-    groupId?: boolean;
-}
-
-interface MouseEventInit extends EventModifierInit {
-    screenX?: number;
-    screenY?: number;
-    clientX?: number;
-    clientY?: number;
-    button?: number;
-    buttons?: number;
-    relatedTarget?: EventTarget;
-}
-
-interface MsZoomToOptions {
-    contentX?: number;
-    contentY?: number;
-    viewportX?: string;
-    viewportY?: string;
-    scaleFactor?: number;
-    animate?: string;
-}
-
-interface MutationObserverInit {
-    childList?: boolean;
-    attributes?: boolean;
-    characterData?: boolean;
-    subtree?: boolean;
-    attributeOldValue?: boolean;
-    characterDataOldValue?: boolean;
-    attributeFilter?: string[];
-}
-
-interface ObjectURLOptions {
-    oneTimeOnly?: boolean;
-}
-
-interface PeriodicWaveConstraints {
-    disableNormalization?: boolean;
-}
-
-interface PointerEventInit extends MouseEventInit {
-    pointerId?: number;
-    width?: number;
-    height?: number;
-    pressure?: number;
-    tiltX?: number;
-    tiltY?: number;
-    pointerType?: string;
-    isPrimary?: boolean;
-}
-
-interface PositionOptions {
-    enableHighAccuracy?: boolean;
-    timeout?: number;
-    maximumAge?: number;
-}
-
-interface RTCDTMFToneChangeEventInit extends EventInit {
-    tone?: string;
-}
-
-interface RTCDtlsFingerprint {
-    algorithm?: string;
-    value?: string;
-}
-
-interface RTCDtlsParameters {
-    role?: string;
-    fingerprints?: RTCDtlsFingerprint[];
-}
-
-interface RTCIceCandidate {
-    foundation?: string;
-    priority?: number;
-    ip?: string;
-    protocol?: string;
-    port?: number;
-    type?: string;
-    tcpType?: string;
-    relatedAddress?: string;
-    relatedPort?: number;
-}
-
-interface RTCIceCandidateAttributes extends RTCStats {
-    ipAddress?: string;
-    portNumber?: number;
-    transport?: string;
-    candidateType?: string;
-    priority?: number;
-    addressSourceUrl?: string;
-}
-
-interface RTCIceCandidateComplete {
-}
-
-interface RTCIceCandidatePair {
-    local?: RTCIceCandidate;
-    remote?: RTCIceCandidate;
-}
-
-interface RTCIceCandidatePairStats extends RTCStats {
-    transportId?: string;
-    localCandidateId?: string;
-    remoteCandidateId?: string;
-    state?: string;
-    priority?: number;
-    nominated?: boolean;
-    writable?: boolean;
-    readable?: boolean;
-    bytesSent?: number;
-    bytesReceived?: number;
-    roundTripTime?: number;
-    availableOutgoingBitrate?: number;
-    availableIncomingBitrate?: number;
-}
-
-interface RTCIceGatherOptions {
-    gatherPolicy?: string;
-    iceservers?: RTCIceServer[];
-}
-
-interface RTCIceParameters {
-    usernameFragment?: string;
-    password?: string;
-}
-
-interface RTCIceServer {
-    urls?: any;
-    username?: string;
-    credential?: string;
-}
-
-interface RTCInboundRTPStreamStats extends RTCRTPStreamStats {
-    packetsReceived?: number;
-    bytesReceived?: number;
-    packetsLost?: number;
-    jitter?: number;
-    fractionLost?: number;
-}
-
-interface RTCMediaStreamTrackStats extends RTCStats {
-    trackIdentifier?: string;
-    remoteSource?: boolean;
-    ssrcIds?: string[];
-    frameWidth?: number;
-    frameHeight?: number;
-    framesPerSecond?: number;
-    framesSent?: number;
-    framesReceived?: number;
-    framesDecoded?: number;
-    framesDropped?: number;
-    framesCorrupted?: number;
-    audioLevel?: number;
-    echoReturnLoss?: number;
-    echoReturnLossEnhancement?: number;
-}
-
-interface RTCOutboundRTPStreamStats extends RTCRTPStreamStats {
-    packetsSent?: number;
-    bytesSent?: number;
-    targetBitrate?: number;
-    roundTripTime?: number;
-}
-
-interface RTCRTPStreamStats extends RTCStats {
-    ssrc?: string;
-    associateStatsId?: string;
-    isRemote?: boolean;
-    mediaTrackId?: string;
-    transportId?: string;
-    codecId?: string;
-    firCount?: number;
-    pliCount?: number;
-    nackCount?: number;
-    sliCount?: number;
-}
-
-interface RTCRtcpFeedback {
-    type?: string;
-    parameter?: string;
-}
-
-interface RTCRtcpParameters {
-    ssrc?: number;
-    cname?: string;
-    reducedSize?: boolean;
-    mux?: boolean;
-}
-
-interface RTCRtpCapabilities {
-    codecs?: RTCRtpCodecCapability[];
-    headerExtensions?: RTCRtpHeaderExtension[];
-    fecMechanisms?: string[];
-}
-
-interface RTCRtpCodecCapability {
-    name?: string;
-    kind?: string;
-    clockRate?: number;
-    preferredPayloadType?: number;
-    maxptime?: number;
-    numChannels?: number;
-    rtcpFeedback?: RTCRtcpFeedback[];
-    parameters?: any;
-    options?: any;
-    maxTemporalLayers?: number;
-    maxSpatialLayers?: number;
-    svcMultiStreamSupport?: boolean;
-}
-
-interface RTCRtpCodecParameters {
-    name?: string;
-    payloadType?: any;
-    clockRate?: number;
-    maxptime?: number;
-    numChannels?: number;
-    rtcpFeedback?: RTCRtcpFeedback[];
-    parameters?: any;
-}
-
-interface RTCRtpContributingSource {
-    timestamp?: number;
-    csrc?: number;
-    audioLevel?: number;
-}
-
-interface RTCRtpEncodingParameters {
-    ssrc?: number;
-    codecPayloadType?: number;
-    fec?: RTCRtpFecParameters;
-    rtx?: RTCRtpRtxParameters;
-    priority?: number;
-    maxBitrate?: number;
-    minQuality?: number;
-    framerateBias?: number;
-    resolutionScale?: number;
-    framerateScale?: number;
-    active?: boolean;
-    encodingId?: string;
-    dependencyEncodingIds?: string[];
-    ssrcRange?: RTCSsrcRange;
-}
-
-interface RTCRtpFecParameters {
-    ssrc?: number;
-    mechanism?: string;
-}
-
-interface RTCRtpHeaderExtension {
-    kind?: string;
-    uri?: string;
-    preferredId?: number;
-    preferredEncrypt?: boolean;
-}
-
-interface RTCRtpHeaderExtensionParameters {
-    uri?: string;
-    id?: number;
-    encrypt?: boolean;
-}
-
-interface RTCRtpParameters {
-    muxId?: string;
-    codecs?: RTCRtpCodecParameters[];
-    headerExtensions?: RTCRtpHeaderExtensionParameters[];
-    encodings?: RTCRtpEncodingParameters[];
-    rtcp?: RTCRtcpParameters;
-}
-
-interface RTCRtpRtxParameters {
-    ssrc?: number;
-}
-
-interface RTCRtpUnhandled {
-    ssrc?: number;
-    payloadType?: number;
-    muxId?: string;
-}
-
-interface RTCSrtpKeyParam {
-    keyMethod?: string;
-    keySalt?: string;
-    lifetime?: string;
-    mkiValue?: number;
-    mkiLength?: number;
-}
-
-interface RTCSrtpSdesParameters {
-    tag?: number;
-    cryptoSuite?: string;
-    keyParams?: RTCSrtpKeyParam[];
-    sessionParams?: string[];
-}
-
-interface RTCSsrcRange {
-    min?: number;
-    max?: number;
-}
-
-interface RTCStats {
-    timestamp?: number;
-    type?: string;
-    id?: string;
-    msType?: string;
-}
-
-interface RTCStatsReport {
-}
-
-interface RTCTransportStats extends RTCStats {
-    bytesSent?: number;
-    bytesReceived?: number;
-    rtcpTransportStatsId?: string;
-    activeConnection?: boolean;
-    selectedCandidatePairId?: string;
-    localCertificateId?: string;
-    remoteCertificateId?: string;
-}
-
-interface StoreExceptionsInformation extends ExceptionInformation {
-    siteName?: string;
-    explanationString?: string;
-    detailURI?: string;
-}
-
-interface StoreSiteSpecificExceptionsInformation extends StoreExceptionsInformation {
-    arrayOfDomainStrings?: string[];
-}
-
-interface UIEventInit extends EventInit {
-    view?: Window;
-    detail?: number;
-}
-
-interface WebGLContextAttributes {
-    failIfMajorPerformanceCaveat?: boolean;
-    alpha?: boolean;
-    depth?: boolean;
-    stencil?: boolean;
-    antialias?: boolean;
-    premultipliedAlpha?: boolean;
-    preserveDrawingBuffer?: boolean;
-}
-
-interface WebGLContextEventInit extends EventInit {
-    statusMessage?: string;
-}
-
-interface WheelEventInit extends MouseEventInit {
-    deltaX?: number;
-    deltaY?: number;
-    deltaZ?: number;
-    deltaMode?: number;
-}
-
-interface EventListener {
-    (evt: Event): void;
-}
-
-interface ANGLE_instanced_arrays {
-    drawArraysInstancedANGLE(mode: number, first: number, count: number, primcount: number): void;
-    drawElementsInstancedANGLE(mode: number, count: number, type: number, offset: number, primcount: number): void;
-    vertexAttribDivisorANGLE(index: number, divisor: number): void;
-    readonly VERTEX_ATTRIB_ARRAY_DIVISOR_ANGLE: number;
-}
-
-declare var ANGLE_instanced_arrays: {
-    prototype: ANGLE_instanced_arrays;
-    new(): ANGLE_instanced_arrays;
-    readonly VERTEX_ATTRIB_ARRAY_DIVISOR_ANGLE: number;
-}
-
-interface AnalyserNode extends AudioNode {
-    fftSize: number;
-    readonly frequencyBinCount: number;
-    maxDecibels: number;
-    minDecibels: number;
-    smoothingTimeConstant: number;
-    getByteFrequencyData(array: Uint8Array): void;
-    getByteTimeDomainData(array: Uint8Array): void;
-    getFloatFrequencyData(array: Float32Array): void;
-    getFloatTimeDomainData(array: Float32Array): void;
-}
-
-declare var AnalyserNode: {
-    prototype: AnalyserNode;
-    new(): AnalyserNode;
-}
-
-interface AnimationEvent extends Event {
-    readonly animationName: string;
-    readonly elapsedTime: number;
-    initAnimationEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, animationNameArg: string, elapsedTimeArg: number): void;
-}
-
-declare var AnimationEvent: {
-    prototype: AnimationEvent;
-    new(): AnimationEvent;
-}
-
-interface ApplicationCache extends EventTarget {
-    oncached: (this: this, ev: Event) => any;
-    onchecking: (this: this, ev: Event) => any;
-    ondownloading: (this: this, ev: Event) => any;
-    onerror: (this: this, ev: ErrorEvent) => any;
-    onnoupdate: (this: this, ev: Event) => any;
-    onobsolete: (this: this, ev: Event) => any;
-    onprogress: (this: this, ev: ProgressEvent) => any;
-    onupdateready: (this: this, ev: Event) => any;
-    readonly status: number;
-    abort(): void;
-    swapCache(): void;
-    update(): void;
-    readonly CHECKING: number;
-    readonly DOWNLOADING: number;
-    readonly IDLE: number;
-    readonly OBSOLETE: number;
-    readonly UNCACHED: number;
-    readonly UPDATEREADY: number;
-    addEventListener(type: "cached", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "checking", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "downloading", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "noupdate", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "obsolete", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "progress", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "updateready", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var ApplicationCache: {
-    prototype: ApplicationCache;
-    new(): ApplicationCache;
-    readonly CHECKING: number;
-    readonly DOWNLOADING: number;
-    readonly IDLE: number;
-    readonly OBSOLETE: number;
-    readonly UNCACHED: number;
-    readonly UPDATEREADY: number;
-}
-
-interface AriaRequestEvent extends Event {
-    readonly attributeName: string;
-    attributeValue: string | null;
-}
-
-declare var AriaRequestEvent: {
-    prototype: AriaRequestEvent;
-    new(type: string, eventInitDict?: AriaRequestEventInit): AriaRequestEvent;
-}
-
-interface Attr extends Node {
-    readonly name: string;
-    readonly ownerElement: Element;
-    readonly prefix: string | null;
-    readonly specified: boolean;
-    value: string;
-}
-
-declare var Attr: {
-    prototype: Attr;
-    new(): Attr;
-}
-
-interface AudioBuffer {
-    readonly duration: number;
-    readonly length: number;
-    readonly numberOfChannels: number;
-    readonly sampleRate: number;
-    copyFromChannel(destination: Float32Array, channelNumber: number, startInChannel?: number): void;
-    copyToChannel(source: Float32Array, channelNumber: number, startInChannel?: number): void;
-    getChannelData(channel: number): Float32Array;
-}
-
-declare var AudioBuffer: {
-    prototype: AudioBuffer;
-    new(): AudioBuffer;
-}
-
-interface AudioBufferSourceNode extends AudioNode {
-    buffer: AudioBuffer | null;
-    readonly detune: AudioParam;
-    loop: boolean;
-    loopEnd: number;
-    loopStart: number;
-    onended: (this: this, ev: MediaStreamErrorEvent) => any;
-    readonly playbackRate: AudioParam;
-    start(when?: number, offset?: number, duration?: number): void;
-    stop(when?: number): void;
-    addEventListener(type: "ended", listener: (this: this, ev: MediaStreamErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var AudioBufferSourceNode: {
-    prototype: AudioBufferSourceNode;
-    new(): AudioBufferSourceNode;
-}
-
-interface AudioContext extends EventTarget {
-    readonly currentTime: number;
-    readonly destination: AudioDestinationNode;
-    readonly listener: AudioListener;
-    readonly sampleRate: number;
-    state: string;
-    createAnalyser(): AnalyserNode;
-    createBiquadFilter(): BiquadFilterNode;
-    createBuffer(numberOfChannels: number, length: number, sampleRate: number): AudioBuffer;
-    createBufferSource(): AudioBufferSourceNode;
-    createChannelMerger(numberOfInputs?: number): ChannelMergerNode;
-    createChannelSplitter(numberOfOutputs?: number): ChannelSplitterNode;
-    createConvolver(): ConvolverNode;
-    createDelay(maxDelayTime?: number): DelayNode;
-    createDynamicsCompressor(): DynamicsCompressorNode;
-    createGain(): GainNode;
-    createMediaElementSource(mediaElement: HTMLMediaElement): MediaElementAudioSourceNode;
-    createMediaStreamSource(mediaStream: MediaStream): MediaStreamAudioSourceNode;
-    createOscillator(): OscillatorNode;
-    createPanner(): PannerNode;
-    createPeriodicWave(real: Float32Array, imag: Float32Array, constraints?: PeriodicWaveConstraints): PeriodicWave;
-    createScriptProcessor(bufferSize?: number, numberOfInputChannels?: number, numberOfOutputChannels?: number): ScriptProcessorNode;
-    createStereoPanner(): StereoPannerNode;
-    createWaveShaper(): WaveShaperNode;
-    decodeAudioData(audioData: ArrayBuffer, successCallback?: DecodeSuccessCallback, errorCallback?: DecodeErrorCallback): PromiseLike<AudioBuffer>;
-}
-
-declare var AudioContext: {
-    prototype: AudioContext;
-    new(): AudioContext;
-}
-
-interface AudioDestinationNode extends AudioNode {
-    readonly maxChannelCount: number;
-}
-
-declare var AudioDestinationNode: {
-    prototype: AudioDestinationNode;
-    new(): AudioDestinationNode;
-}
-
-interface AudioListener {
-    dopplerFactor: number;
-    speedOfSound: number;
-    setOrientation(x: number, y: number, z: number, xUp: number, yUp: number, zUp: number): void;
-    setPosition(x: number, y: number, z: number): void;
-    setVelocity(x: number, y: number, z: number): void;
-}
-
-declare var AudioListener: {
-    prototype: AudioListener;
-    new(): AudioListener;
-}
-
-interface AudioNode extends EventTarget {
-    channelCount: number;
-    channelCountMode: string;
-    channelInterpretation: string;
-    readonly context: AudioContext;
-    readonly numberOfInputs: number;
-    readonly numberOfOutputs: number;
-    connect(destination: AudioNode, output?: number, input?: number): void;
-    disconnect(output?: number): void;
-    disconnect(destination: AudioNode, output?: number, input?: number): void;
-    disconnect(destination: AudioParam, output?: number): void;
-}
-
-declare var AudioNode: {
-    prototype: AudioNode;
-    new(): AudioNode;
-}
-
-interface AudioParam {
-    readonly defaultValue: number;
-    value: number;
-    cancelScheduledValues(startTime: number): void;
-    exponentialRampToValueAtTime(value: number, endTime: number): void;
-    linearRampToValueAtTime(value: number, endTime: number): void;
-    setTargetAtTime(target: number, startTime: number, timeConstant: number): void;
-    setValueAtTime(value: number, startTime: number): void;
-    setValueCurveAtTime(values: Float32Array, startTime: number, duration: number): void;
-}
-
-declare var AudioParam: {
-    prototype: AudioParam;
-    new(): AudioParam;
-}
-
-interface AudioProcessingEvent extends Event {
-    readonly inputBuffer: AudioBuffer;
-    readonly outputBuffer: AudioBuffer;
-    readonly playbackTime: number;
-}
-
-declare var AudioProcessingEvent: {
-    prototype: AudioProcessingEvent;
-    new(): AudioProcessingEvent;
-}
-
-interface AudioTrack {
-    enabled: boolean;
-    readonly id: string;
-    kind: string;
-    readonly label: string;
-    language: string;
-    readonly sourceBuffer: SourceBuffer;
-}
-
-declare var AudioTrack: {
-    prototype: AudioTrack;
-    new(): AudioTrack;
-}
-
-interface AudioTrackList extends EventTarget {
-    readonly length: number;
-    onaddtrack: (this: this, ev: TrackEvent) => any;
-    onchange: (this: this, ev: Event) => any;
-    onremovetrack: (this: this, ev: TrackEvent) => any;
-    getTrackById(id: string): AudioTrack | null;
-    item(index: number): AudioTrack;
-    addEventListener(type: "addtrack", listener: (this: this, ev: TrackEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "change", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "removetrack", listener: (this: this, ev: TrackEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-    [index: number]: AudioTrack;
-}
-
-declare var AudioTrackList: {
-    prototype: AudioTrackList;
-    new(): AudioTrackList;
-}
-
-interface BarProp {
-    readonly visible: boolean;
-}
-
-declare var BarProp: {
-    prototype: BarProp;
-    new(): BarProp;
-}
-
-interface BeforeUnloadEvent extends Event {
-    returnValue: any;
-}
-
-declare var BeforeUnloadEvent: {
-    prototype: BeforeUnloadEvent;
-    new(): BeforeUnloadEvent;
-}
-
-interface BiquadFilterNode extends AudioNode {
-    readonly Q: AudioParam;
-    readonly detune: AudioParam;
-    readonly frequency: AudioParam;
-    readonly gain: AudioParam;
-    type: string;
-    getFrequencyResponse(frequencyHz: Float32Array, magResponse: Float32Array, phaseResponse: Float32Array): void;
-}
-
-declare var BiquadFilterNode: {
-    prototype: BiquadFilterNode;
-    new(): BiquadFilterNode;
-}
-
-interface Blob {
-    readonly size: number;
-    readonly type: string;
-    msClose(): void;
-    msDetachStream(): any;
-    slice(start?: number, end?: number, contentType?: string): Blob;
-}
-
-declare var Blob: {
-    prototype: Blob;
-    new (blobParts?: any[], options?: BlobPropertyBag): Blob;
-}
-
-interface CDATASection extends Text {
-}
-
-declare var CDATASection: {
-    prototype: CDATASection;
-    new(): CDATASection;
-}
-
-interface CSS {
-    supports(property: string, value?: string): boolean;
-}
-declare var CSS: CSS;
-
-interface CSSConditionRule extends CSSGroupingRule {
-    conditionText: string;
-}
-
-declare var CSSConditionRule: {
-    prototype: CSSConditionRule;
-    new(): CSSConditionRule;
-}
-
-interface CSSFontFaceRule extends CSSRule {
-    readonly style: CSSStyleDeclaration;
-}
-
-declare var CSSFontFaceRule: {
-    prototype: CSSFontFaceRule;
-    new(): CSSFontFaceRule;
-}
-
-interface CSSGroupingRule extends CSSRule {
-    readonly cssRules: CSSRuleList;
-    deleteRule(index: number): void;
-    insertRule(rule: string, index: number): number;
-}
-
-declare var CSSGroupingRule: {
-    prototype: CSSGroupingRule;
-    new(): CSSGroupingRule;
-}
-
-interface CSSImportRule extends CSSRule {
-    readonly href: string;
-    readonly media: MediaList;
-    readonly styleSheet: CSSStyleSheet;
-}
-
-declare var CSSImportRule: {
-    prototype: CSSImportRule;
-    new(): CSSImportRule;
-}
-
-interface CSSKeyframeRule extends CSSRule {
-    keyText: string;
-    readonly style: CSSStyleDeclaration;
-}
-
-declare var CSSKeyframeRule: {
-    prototype: CSSKeyframeRule;
-    new(): CSSKeyframeRule;
-}
-
-interface CSSKeyframesRule extends CSSRule {
-    readonly cssRules: CSSRuleList;
-    name: string;
-    appendRule(rule: string): void;
-    deleteRule(rule: string): void;
-    findRule(rule: string): CSSKeyframeRule;
-}
-
-declare var CSSKeyframesRule: {
-    prototype: CSSKeyframesRule;
-    new(): CSSKeyframesRule;
-}
-
-interface CSSMediaRule extends CSSConditionRule {
-    readonly media: MediaList;
-}
-
-declare var CSSMediaRule: {
-    prototype: CSSMediaRule;
-    new(): CSSMediaRule;
-}
-
-interface CSSNamespaceRule extends CSSRule {
-    readonly namespaceURI: string;
-    readonly prefix: string;
-}
-
-declare var CSSNamespaceRule: {
-    prototype: CSSNamespaceRule;
-    new(): CSSNamespaceRule;
-}
-
-interface CSSPageRule extends CSSRule {
-    readonly pseudoClass: string;
-    readonly selector: string;
-    selectorText: string;
-    readonly style: CSSStyleDeclaration;
-}
-
-declare var CSSPageRule: {
-    prototype: CSSPageRule;
-    new(): CSSPageRule;
-}
-
-interface CSSRule {
-    cssText: string;
-    readonly parentRule: CSSRule;
-    readonly parentStyleSheet: CSSStyleSheet;
-    readonly type: number;
-    readonly CHARSET_RULE: number;
-    readonly FONT_FACE_RULE: number;
-    readonly IMPORT_RULE: number;
-    readonly KEYFRAMES_RULE: number;
-    readonly KEYFRAME_RULE: number;
-    readonly MEDIA_RULE: number;
-    readonly NAMESPACE_RULE: number;
-    readonly PAGE_RULE: number;
-    readonly STYLE_RULE: number;
-    readonly SUPPORTS_RULE: number;
-    readonly UNKNOWN_RULE: number;
-    readonly VIEWPORT_RULE: number;
-}
-
-declare var CSSRule: {
-    prototype: CSSRule;
-    new(): CSSRule;
-    readonly CHARSET_RULE: number;
-    readonly FONT_FACE_RULE: number;
-    readonly IMPORT_RULE: number;
-    readonly KEYFRAMES_RULE: number;
-    readonly KEYFRAME_RULE: number;
-    readonly MEDIA_RULE: number;
-    readonly NAMESPACE_RULE: number;
-    readonly PAGE_RULE: number;
-    readonly STYLE_RULE: number;
-    readonly SUPPORTS_RULE: number;
-    readonly UNKNOWN_RULE: number;
-    readonly VIEWPORT_RULE: number;
-}
-
-interface CSSRuleList {
-    readonly length: number;
-    item(index: number): CSSRule;
-    [index: number]: CSSRule;
-}
-
-declare var CSSRuleList: {
-    prototype: CSSRuleList;
-    new(): CSSRuleList;
-}
-
-interface CSSStyleDeclaration {
-    alignContent: string | null;
-    alignItems: string | null;
-    alignSelf: string | null;
-    alignmentBaseline: string | null;
-    animation: string | null;
-    animationDelay: string | null;
-    animationDirection: string | null;
-    animationDuration: string | null;
-    animationFillMode: string | null;
-    animationIterationCount: string | null;
-    animationName: string | null;
-    animationPlayState: string | null;
-    animationTimingFunction: string | null;
-    backfaceVisibility: string | null;
-    background: string | null;
-    backgroundAttachment: string | null;
-    backgroundClip: string | null;
-    backgroundColor: string | null;
-    backgroundImage: string | null;
-    backgroundOrigin: string | null;
-    backgroundPosition: string | null;
-    backgroundPositionX: string | null;
-    backgroundPositionY: string | null;
-    backgroundRepeat: string | null;
-    backgroundSize: string | null;
-    baselineShift: string | null;
-    border: string | null;
-    borderBottom: string | null;
-    borderBottomColor: string | null;
-    borderBottomLeftRadius: string | null;
-    borderBottomRightRadius: string | null;
-    borderBottomStyle: string | null;
-    borderBottomWidth: string | null;
-    borderCollapse: string | null;
-    borderColor: string | null;
-    borderImage: string | null;
-    borderImageOutset: string | null;
-    borderImageRepeat: string | null;
-    borderImageSlice: string | null;
-    borderImageSource: string | null;
-    borderImageWidth: string | null;
-    borderLeft: string | null;
-    borderLeftColor: string | null;
-    borderLeftStyle: string | null;
-    borderLeftWidth: string | null;
-    borderRadius: string | null;
-    borderRight: string | null;
-    borderRightColor: string | null;
-    borderRightStyle: string | null;
-    borderRightWidth: string | null;
-    borderSpacing: string | null;
-    borderStyle: string | null;
-    borderTop: string | null;
-    borderTopColor: string | null;
-    borderTopLeftRadius: string | null;
-    borderTopRightRadius: string | null;
-    borderTopStyle: string | null;
-    borderTopWidth: string | null;
-    borderWidth: string | null;
-    bottom: string | null;
-    boxShadow: string | null;
-    boxSizing: string | null;
-    breakAfter: string | null;
-    breakBefore: string | null;
-    breakInside: string | null;
-    captionSide: string | null;
-    clear: string | null;
-    clip: string | null;
-    clipPath: string | null;
-    clipRule: string | null;
-    color: string | null;
-    colorInterpolationFilters: string | null;
-    columnCount: any;
-    columnFill: string | null;
-    columnGap: any;
-    columnRule: string | null;
-    columnRuleColor: any;
-    columnRuleStyle: string | null;
-    columnRuleWidth: any;
-    columnSpan: string | null;
-    columnWidth: any;
-    columns: string | null;
-    content: string | null;
-    counterIncrement: string | null;
-    counterReset: string | null;
-    cssFloat: string | null;
-    cssText: string;
-    cursor: string | null;
-    direction: string | null;
-    display: string | null;
-    dominantBaseline: string | null;
-    emptyCells: string | null;
-    enableBackground: string | null;
-    fill: string | null;
-    fillOpacity: string | null;
-    fillRule: string | null;
-    filter: string | null;
-    flex: string | null;
-    flexBasis: string | null;
-    flexDirection: string | null;
-    flexFlow: string | null;
-    flexGrow: string | null;
-    flexShrink: string | null;
-    flexWrap: string | null;
-    floodColor: string | null;
-    floodOpacity: string | null;
-    font: string | null;
-    fontFamily: string | null;
-    fontFeatureSettings: string | null;
-    fontSize: string | null;
-    fontSizeAdjust: string | null;
-    fontStretch: string | null;
-    fontStyle: string | null;
-    fontVariant: string | null;
-    fontWeight: string | null;
-    glyphOrientationHorizontal: string | null;
-    glyphOrientationVertical: string | null;
-    height: string | null;
-    imeMode: string | null;
-    justifyContent: string | null;
-    kerning: string | null;
-    left: string | null;
-    readonly length: number;
-    letterSpacing: string | null;
-    lightingColor: string | null;
-    lineHeight: string | null;
-    listStyle: string | null;
-    listStyleImage: string | null;
-    listStylePosition: string | null;
-    listStyleType: string | null;
-    margin: string | null;
-    marginBottom: string | null;
-    marginLeft: string | null;
-    marginRight: string | null;
-    marginTop: string | null;
-    marker: string | null;
-    markerEnd: string | null;
-    markerMid: string | null;
-    markerStart: string | null;
-    mask: string | null;
-    maxHeight: string | null;
-    maxWidth: string | null;
-    minHeight: string | null;
-    minWidth: string | null;
-    msContentZoomChaining: string | null;
-    msContentZoomLimit: string | null;
-    msContentZoomLimitMax: any;
-    msContentZoomLimitMin: any;
-    msContentZoomSnap: string | null;
-    msContentZoomSnapPoints: string | null;
-    msContentZoomSnapType: string | null;
-    msContentZooming: string | null;
-    msFlowFrom: string | null;
-    msFlowInto: string | null;
-    msFontFeatureSettings: string | null;
-    msGridColumn: any;
-    msGridColumnAlign: string | null;
-    msGridColumnSpan: any;
-    msGridColumns: string | null;
-    msGridRow: any;
-    msGridRowAlign: string | null;
-    msGridRowSpan: any;
-    msGridRows: string | null;
-    msHighContrastAdjust: string | null;
-    msHyphenateLimitChars: string | null;
-    msHyphenateLimitLines: any;
-    msHyphenateLimitZone: any;
-    msHyphens: string | null;
-    msImeAlign: string | null;
-    msOverflowStyle: string | null;
-    msScrollChaining: string | null;
-    msScrollLimit: string | null;
-    msScrollLimitXMax: any;
-    msScrollLimitXMin: any;
-    msScrollLimitYMax: any;
-    msScrollLimitYMin: any;
-    msScrollRails: string | null;
-    msScrollSnapPointsX: string | null;
-    msScrollSnapPointsY: string | null;
-    msScrollSnapType: string | null;
-    msScrollSnapX: string | null;
-    msScrollSnapY: string | null;
-    msScrollTranslation: string | null;
-    msTextCombineHorizontal: string | null;
-    msTextSizeAdjust: any;
-    msTouchAction: string | null;
-    msTouchSelect: string | null;
-    msUserSelect: string | null;
-    msWrapFlow: string;
-    msWrapMargin: any;
-    msWrapThrough: string;
-    opacity: string | null;
-    order: string | null;
-    orphans: string | null;
-    outline: string | null;
-    outlineColor: string | null;
-    outlineStyle: string | null;
-    outlineWidth: string | null;
-    overflow: string | null;
-    overflowX: string | null;
-    overflowY: string | null;
-    padding: string | null;
-    paddingBottom: string | null;
-    paddingLeft: string | null;
-    paddingRight: string | null;
-    paddingTop: string | null;
-    pageBreakAfter: string | null;
-    pageBreakBefore: string | null;
-    pageBreakInside: string | null;
-    readonly parentRule: CSSRule;
-    perspective: string | null;
-    perspectiveOrigin: string | null;
-    pointerEvents: string | null;
-    position: string | null;
-    quotes: string | null;
-    right: string | null;
-    rubyAlign: string | null;
-    rubyOverhang: string | null;
-    rubyPosition: string | null;
-    stopColor: string | null;
-    stopOpacity: string | null;
-    stroke: string | null;
-    strokeDasharray: string | null;
-    strokeDashoffset: string | null;
-    strokeLinecap: string | null;
-    strokeLinejoin: string | null;
-    strokeMiterlimit: string | null;
-    strokeOpacity: string | null;
-    strokeWidth: string | null;
-    tableLayout: string | null;
-    textAlign: string | null;
-    textAlignLast: string | null;
-    textAnchor: string | null;
-    textDecoration: string | null;
-    textIndent: string | null;
-    textJustify: string | null;
-    textKashida: string | null;
-    textKashidaSpace: string | null;
-    textOverflow: string | null;
-    textShadow: string | null;
-    textTransform: string | null;
-    textUnderlinePosition: string | null;
-    top: string | null;
-    touchAction: string | null;
-    transform: string | null;
-    transformOrigin: string | null;
-    transformStyle: string | null;
-    transition: string | null;
-    transitionDelay: string | null;
-    transitionDuration: string | null;
-    transitionProperty: string | null;
-    transitionTimingFunction: string | null;
-    unicodeBidi: string | null;
-    verticalAlign: string | null;
-    visibility: string | null;
-    webkitAlignContent: string | null;
-    webkitAlignItems: string | null;
-    webkitAlignSelf: string | null;
-    webkitAnimation: string | null;
-    webkitAnimationDelay: string | null;
-    webkitAnimationDirection: string | null;
-    webkitAnimationDuration: string | null;
-    webkitAnimationFillMode: string | null;
-    webkitAnimationIterationCount: string | null;
-    webkitAnimationName: string | null;
-    webkitAnimationPlayState: string | null;
-    webkitAnimationTimingFunction: string | null;
-    webkitAppearance: string | null;
-    webkitBackfaceVisibility: string | null;
-    webkitBackgroundClip: string | null;
-    webkitBackgroundOrigin: string | null;
-    webkitBackgroundSize: string | null;
-    webkitBorderBottomLeftRadius: string | null;
-    webkitBorderBottomRightRadius: string | null;
-    webkitBorderImage: string | null;
-    webkitBorderRadius: string | null;
-    webkitBorderTopLeftRadius: string | null;
-    webkitBorderTopRightRadius: string | null;
-    webkitBoxAlign: string | null;
-    webkitBoxDirection: string | null;
-    webkitBoxFlex: string | null;
-    webkitBoxOrdinalGroup: string | null;
-    webkitBoxOrient: string | null;
-    webkitBoxPack: string | null;
-    webkitBoxSizing: string | null;
-    webkitColumnBreakAfter: string | null;
-    webkitColumnBreakBefore: string | null;
-    webkitColumnBreakInside: string | null;
-    webkitColumnCount: any;
-    webkitColumnGap: any;
-    webkitColumnRule: string | null;
-    webkitColumnRuleColor: any;
-    webkitColumnRuleStyle: string | null;
-    webkitColumnRuleWidth: any;
-    webkitColumnSpan: string | null;
-    webkitColumnWidth: any;
-    webkitColumns: string | null;
-    webkitFilter: string | null;
-    webkitFlex: string | null;
-    webkitFlexBasis: string | null;
-    webkitFlexDirection: string | null;
-    webkitFlexFlow: string | null;
-    webkitFlexGrow: string | null;
-    webkitFlexShrink: string | null;
-    webkitFlexWrap: string | null;
-    webkitJustifyContent: string | null;
-    webkitOrder: string | null;
-    webkitPerspective: string | null;
-    webkitPerspectiveOrigin: string | null;
-    webkitTapHighlightColor: string | null;
-    webkitTextFillColor: string | null;
-    webkitTextSizeAdjust: any;
-    webkitTransform: string | null;
-    webkitTransformOrigin: string | null;
-    webkitTransformStyle: string | null;
-    webkitTransition: string | null;
-    webkitTransitionDelay: string | null;
-    webkitTransitionDuration: string | null;
-    webkitTransitionProperty: string | null;
-    webkitTransitionTimingFunction: string | null;
-    webkitUserModify: string | null;
-    webkitUserSelect: string | null;
-    webkitWritingMode: string | null;
-    whiteSpace: string | null;
-    widows: string | null;
-    width: string | null;
-    wordBreak: string | null;
-    wordSpacing: string | null;
-    wordWrap: string | null;
-    writingMode: string | null;
-    zIndex: string | null;
-    zoom: string | null;
-    getPropertyPriority(propertyName: string): string;
-    getPropertyValue(propertyName: string): string;
-    item(index: number): string;
-    removeProperty(propertyName: string): string;
-    setProperty(propertyName: string, value: string | null, priority?: string): void;
-    [index: number]: string;
-}
-
-declare var CSSStyleDeclaration: {
-    prototype: CSSStyleDeclaration;
-    new(): CSSStyleDeclaration;
-}
-
-interface CSSStyleRule extends CSSRule {
-    readonly readOnly: boolean;
-    selectorText: string;
-    readonly style: CSSStyleDeclaration;
-}
-
-declare var CSSStyleRule: {
-    prototype: CSSStyleRule;
-    new(): CSSStyleRule;
-}
-
-interface CSSStyleSheet extends StyleSheet {
-    readonly cssRules: CSSRuleList;
-    cssText: string;
-    readonly href: string;
-    readonly id: string;
-    readonly imports: StyleSheetList;
-    readonly isAlternate: boolean;
-    readonly isPrefAlternate: boolean;
-    readonly ownerRule: CSSRule;
-    readonly owningElement: Element;
-    readonly pages: StyleSheetPageList;
-    readonly readOnly: boolean;
-    readonly rules: CSSRuleList;
-    addImport(bstrURL: string, lIndex?: number): number;
-    addPageRule(bstrSelector: string, bstrStyle: string, lIndex?: number): number;
-    addRule(bstrSelector: string, bstrStyle?: string, lIndex?: number): number;
-    deleteRule(index?: number): void;
-    insertRule(rule: string, index?: number): number;
-    removeImport(lIndex: number): void;
-    removeRule(lIndex: number): void;
-}
-
-declare var CSSStyleSheet: {
-    prototype: CSSStyleSheet;
-    new(): CSSStyleSheet;
-}
-
-interface CSSSupportsRule extends CSSConditionRule {
-}
-
-declare var CSSSupportsRule: {
-    prototype: CSSSupportsRule;
-    new(): CSSSupportsRule;
-}
-
-interface CanvasGradient {
-    addColorStop(offset: number, color: string): void;
-}
-
-declare var CanvasGradient: {
-    prototype: CanvasGradient;
-    new(): CanvasGradient;
-}
-
-interface CanvasPattern {
-}
-
-declare var CanvasPattern: {
-    prototype: CanvasPattern;
-    new(): CanvasPattern;
-}
-
-interface CanvasRenderingContext2D extends Object, CanvasPathMethods {
-    readonly canvas: HTMLCanvasElement;
-    fillStyle: string | CanvasGradient | CanvasPattern;
-    font: string;
-    globalAlpha: number;
-    globalCompositeOperation: string;
-    lineCap: string;
-    lineDashOffset: number;
-    lineJoin: string;
-    lineWidth: number;
-    miterLimit: number;
-    msFillRule: string;
-    msImageSmoothingEnabled: boolean;
-    shadowBlur: number;
-    shadowColor: string;
-    shadowOffsetX: number;
-    shadowOffsetY: number;
-    strokeStyle: string | CanvasGradient | CanvasPattern;
-    textAlign: string;
-    textBaseline: string;
-    mozImageSmoothingEnabled: boolean;
-    webkitImageSmoothingEnabled: boolean;
-    oImageSmoothingEnabled: boolean;
-    beginPath(): void;
-    clearRect(x: number, y: number, w: number, h: number): void;
-    clip(fillRule?: string): void;
-    createImageData(imageDataOrSw: number | ImageData, sh?: number): ImageData;
-    createLinearGradient(x0: number, y0: number, x1: number, y1: number): CanvasGradient;
-    createPattern(image: HTMLImageElement | HTMLCanvasElement | HTMLVideoElement, repetition: string): CanvasPattern;
-    createRadialGradient(x0: number, y0: number, r0: number, x1: number, y1: number, r1: number): CanvasGradient;
-    drawImage(image: HTMLImageElement | HTMLCanvasElement | HTMLVideoElement, offsetX: number, offsetY: number, width?: number, height?: number, canvasOffsetX?: number, canvasOffsetY?: number, canvasImageWidth?: number, canvasImageHeight?: number): void;
-    fill(fillRule?: string): void;
-    fillRect(x: number, y: number, w: number, h: number): void;
-    fillText(text: string, x: number, y: number, maxWidth?: number): void;
-    getImageData(sx: number, sy: number, sw: number, sh: number): ImageData;
-    getLineDash(): number[];
-    isPointInPath(x: number, y: number, fillRule?: string): boolean;
-    measureText(text: string): TextMetrics;
-    putImageData(imagedata: ImageData, dx: number, dy: number, dirtyX?: number, dirtyY?: number, dirtyWidth?: number, dirtyHeight?: number): void;
-    restore(): void;
-    rotate(angle: number): void;
-    save(): void;
-    scale(x: number, y: number): void;
-    setLineDash(segments: number[]): void;
-    setTransform(m11: number, m12: number, m21: number, m22: number, dx: number, dy: number): void;
-    stroke(): void;
-    strokeRect(x: number, y: number, w: number, h: number): void;
-    strokeText(text: string, x: number, y: number, maxWidth?: number): void;
-    transform(m11: number, m12: number, m21: number, m22: number, dx: number, dy: number): void;
-    translate(x: number, y: number): void;
-}
-
-declare var CanvasRenderingContext2D: {
-    prototype: CanvasRenderingContext2D;
-    new(): CanvasRenderingContext2D;
-}
-
-interface ChannelMergerNode extends AudioNode {
-}
-
-declare var ChannelMergerNode: {
-    prototype: ChannelMergerNode;
-    new(): ChannelMergerNode;
-}
-
-interface ChannelSplitterNode extends AudioNode {
-}
-
-declare var ChannelSplitterNode: {
-    prototype: ChannelSplitterNode;
-    new(): ChannelSplitterNode;
-}
-
-interface CharacterData extends Node, ChildNode {
-    data: string;
-    readonly length: number;
-    appendData(arg: string): void;
-    deleteData(offset: number, count: number): void;
-    insertData(offset: number, arg: string): void;
-    replaceData(offset: number, count: number, arg: string): void;
-    substringData(offset: number, count: number): string;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var CharacterData: {
-    prototype: CharacterData;
-    new(): CharacterData;
-}
-
-interface ClientRect {
-    bottom: number;
-    readonly height: number;
-    left: number;
-    right: number;
-    top: number;
-    readonly width: number;
-}
-
-declare var ClientRect: {
-    prototype: ClientRect;
-    new(): ClientRect;
-}
-
-interface ClientRectList {
-    readonly length: number;
-    item(index: number): ClientRect;
-    [index: number]: ClientRect;
-}
-
-declare var ClientRectList: {
-    prototype: ClientRectList;
-    new(): ClientRectList;
-}
-
-interface ClipboardEvent extends Event {
-    readonly clipboardData: DataTransfer;
-}
-
-declare var ClipboardEvent: {
-    prototype: ClipboardEvent;
-    new(type: string, eventInitDict?: ClipboardEventInit): ClipboardEvent;
-}
-
-interface CloseEvent extends Event {
-    readonly code: number;
-    readonly reason: string;
-    readonly wasClean: boolean;
-    initCloseEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, wasCleanArg: boolean, codeArg: number, reasonArg: string): void;
-}
-
-declare var CloseEvent: {
-    prototype: CloseEvent;
-    new(): CloseEvent;
-}
-
-interface CommandEvent extends Event {
-    readonly commandName: string;
-    readonly detail: string | null;
-}
-
-declare var CommandEvent: {
-    prototype: CommandEvent;
-    new(type: string, eventInitDict?: CommandEventInit): CommandEvent;
-}
-
-interface Comment extends CharacterData {
-    text: string;
-}
-
-declare var Comment: {
-    prototype: Comment;
-    new(): Comment;
-}
-
-interface CompositionEvent extends UIEvent {
-    readonly data: string;
-    readonly locale: string;
-    initCompositionEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, dataArg: string, locale: string): void;
-}
-
-declare var CompositionEvent: {
-    prototype: CompositionEvent;
-    new(typeArg: string, eventInitDict?: CompositionEventInit): CompositionEvent;
-}
-
-interface Console {
-    assert(test?: boolean, message?: string, ...optionalParams: any[]): void;
-    clear(): void;
-    count(countTitle?: string): void;
-    debug(message?: string, ...optionalParams: any[]): void;
-    dir(value?: any, ...optionalParams: any[]): void;
-    dirxml(value: any): void;
-    error(message?: any, ...optionalParams: any[]): void;
-    exception(message?: string, ...optionalParams: any[]): void;
-    group(groupTitle?: string): void;
-    groupCollapsed(groupTitle?: string): void;
-    groupEnd(): void;
-    info(message?: any, ...optionalParams: any[]): void;
-    log(message?: any, ...optionalParams: any[]): void;
-    msIsIndependentlyComposed(element: Element): boolean;
-    profile(reportName?: string): void;
-    profileEnd(): void;
-    select(element: Element): void;
-    table(...data: any[]): void;
-    time(timerName?: string): void;
-    timeEnd(timerName?: string): void;
-    trace(message?: any, ...optionalParams: any[]): void;
-    warn(message?: any, ...optionalParams: any[]): void;
-}
-
-declare var Console: {
-    prototype: Console;
-    new(): Console;
-}
-
-interface ConvolverNode extends AudioNode {
-    buffer: AudioBuffer | null;
-    normalize: boolean;
-}
-
-declare var ConvolverNode: {
-    prototype: ConvolverNode;
-    new(): ConvolverNode;
-}
-
-interface Coordinates {
-    readonly accuracy: number;
-    readonly altitude: number | null;
-    readonly altitudeAccuracy: number | null;
-    readonly heading: number | null;
-    readonly latitude: number;
-    readonly longitude: number;
-    readonly speed: number | null;
-}
-
-declare var Coordinates: {
-    prototype: Coordinates;
-    new(): Coordinates;
-}
-
-interface Crypto extends Object, RandomSource {
-    readonly subtle: SubtleCrypto;
-}
-
-declare var Crypto: {
-    prototype: Crypto;
-    new(): Crypto;
-}
-
-interface CryptoKey {
-    readonly algorithm: KeyAlgorithm;
-    readonly extractable: boolean;
-    readonly type: string;
-    readonly usages: string[];
-}
-
-declare var CryptoKey: {
-    prototype: CryptoKey;
-    new(): CryptoKey;
-}
-
-interface CryptoKeyPair {
-    privateKey: CryptoKey;
-    publicKey: CryptoKey;
-}
-
-declare var CryptoKeyPair: {
-    prototype: CryptoKeyPair;
-    new(): CryptoKeyPair;
-}
-
-interface CustomEvent extends Event {
-    readonly detail: any;
-    initCustomEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, detailArg: any): void;
-}
-
-declare var CustomEvent: {
-    prototype: CustomEvent;
-    new(typeArg: string, eventInitDict?: CustomEventInit): CustomEvent;
-}
-
-interface DOMError {
-    readonly name: string;
-    toString(): string;
-}
-
-declare var DOMError: {
-    prototype: DOMError;
-    new(): DOMError;
-}
-
-interface DOMException {
-    readonly code: number;
-    readonly message: string;
-    readonly name: string;
-    toString(): string;
-    readonly ABORT_ERR: number;
-    readonly DATA_CLONE_ERR: number;
-    readonly DOMSTRING_SIZE_ERR: number;
-    readonly HIERARCHY_REQUEST_ERR: number;
-    readonly INDEX_SIZE_ERR: number;
-    readonly INUSE_ATTRIBUTE_ERR: number;
-    readonly INVALID_ACCESS_ERR: number;
-    readonly INVALID_CHARACTER_ERR: number;
-    readonly INVALID_MODIFICATION_ERR: number;
-    readonly INVALID_NODE_TYPE_ERR: number;
-    readonly INVALID_STATE_ERR: number;
-    readonly NAMESPACE_ERR: number;
-    readonly NETWORK_ERR: number;
-    readonly NOT_FOUND_ERR: number;
-    readonly NOT_SUPPORTED_ERR: number;
-    readonly NO_DATA_ALLOWED_ERR: number;
-    readonly NO_MODIFICATION_ALLOWED_ERR: number;
-    readonly PARSE_ERR: number;
-    readonly QUOTA_EXCEEDED_ERR: number;
-    readonly SECURITY_ERR: number;
-    readonly SERIALIZE_ERR: number;
-    readonly SYNTAX_ERR: number;
-    readonly TIMEOUT_ERR: number;
-    readonly TYPE_MISMATCH_ERR: number;
-    readonly URL_MISMATCH_ERR: number;
-    readonly VALIDATION_ERR: number;
-    readonly WRONG_DOCUMENT_ERR: number;
-}
-
-declare var DOMException: {
-    prototype: DOMException;
-    new(): DOMException;
-    readonly ABORT_ERR: number;
-    readonly DATA_CLONE_ERR: number;
-    readonly DOMSTRING_SIZE_ERR: number;
-    readonly HIERARCHY_REQUEST_ERR: number;
-    readonly INDEX_SIZE_ERR: number;
-    readonly INUSE_ATTRIBUTE_ERR: number;
-    readonly INVALID_ACCESS_ERR: number;
-    readonly INVALID_CHARACTER_ERR: number;
-    readonly INVALID_MODIFICATION_ERR: number;
-    readonly INVALID_NODE_TYPE_ERR: number;
-    readonly INVALID_STATE_ERR: number;
-    readonly NAMESPACE_ERR: number;
-    readonly NETWORK_ERR: number;
-    readonly NOT_FOUND_ERR: number;
-    readonly NOT_SUPPORTED_ERR: number;
-    readonly NO_DATA_ALLOWED_ERR: number;
-    readonly NO_MODIFICATION_ALLOWED_ERR: number;
-    readonly PARSE_ERR: number;
-    readonly QUOTA_EXCEEDED_ERR: number;
-    readonly SECURITY_ERR: number;
-    readonly SERIALIZE_ERR: number;
-    readonly SYNTAX_ERR: number;
-    readonly TIMEOUT_ERR: number;
-    readonly TYPE_MISMATCH_ERR: number;
-    readonly URL_MISMATCH_ERR: number;
-    readonly VALIDATION_ERR: number;
-    readonly WRONG_DOCUMENT_ERR: number;
-}
-
-interface DOMImplementation {
-    createDocument(namespaceURI: string | null, qualifiedName: string | null, doctype: DocumentType): Document;
-    createDocumentType(qualifiedName: string, publicId: string | null, systemId: string | null): DocumentType;
-    createHTMLDocument(title: string): Document;
-    hasFeature(feature: string | null, version: string | null): boolean;
-}
-
-declare var DOMImplementation: {
-    prototype: DOMImplementation;
-    new(): DOMImplementation;
-}
-
-interface DOMParser {
-    parseFromString(source: string, mimeType: string): Document;
-}
-
-declare var DOMParser: {
-    prototype: DOMParser;
-    new(): DOMParser;
-}
-
-interface DOMSettableTokenList extends DOMTokenList {
-    value: string;
-}
-
-declare var DOMSettableTokenList: {
-    prototype: DOMSettableTokenList;
-    new(): DOMSettableTokenList;
-}
-
-interface DOMStringList {
-    readonly length: number;
-    contains(str: string): boolean;
-    item(index: number): string | null;
-    [index: number]: string;
-}
-
-declare var DOMStringList: {
-    prototype: DOMStringList;
-    new(): DOMStringList;
-}
-
-interface DOMStringMap {
-    [name: string]: string;
-}
-
-declare var DOMStringMap: {
-    prototype: DOMStringMap;
-    new(): DOMStringMap;
-}
-
-interface DOMTokenList {
-    readonly length: number;
-    add(...token: string[]): void;
-    contains(token: string): boolean;
-    item(index: number): string;
-    remove(...token: string[]): void;
-    toString(): string;
-    toggle(token: string, force?: boolean): boolean;
-    [index: number]: string;
-}
-
-declare var DOMTokenList: {
-    prototype: DOMTokenList;
-    new(): DOMTokenList;
-}
-
-interface DataCue extends TextTrackCue {
-    data: ArrayBuffer;
-}
-
-declare var DataCue: {
-    prototype: DataCue;
-    new(): DataCue;
-}
-
-interface DataTransfer {
-    dropEffect: string;
-    effectAllowed: string;
-    readonly files: FileList;
-    readonly items: DataTransferItemList;
-    readonly types: DOMStringList;
-    clearData(format?: string): boolean;
-    getData(format: string): string;
-    setData(format: string, data: string): boolean;
-}
-
-declare var DataTransfer: {
-    prototype: DataTransfer;
-    new(): DataTransfer;
-}
-
-interface DataTransferItem {
-    readonly kind: string;
-    readonly type: string;
-    getAsFile(): File | null;
-    getAsString(_callback: FunctionStringCallback | null): void;
-}
-
-declare var DataTransferItem: {
-    prototype: DataTransferItem;
-    new(): DataTransferItem;
-}
-
-interface DataTransferItemList {
-    readonly length: number;
-    add(data: File): DataTransferItem | null;
-    clear(): void;
-    item(index: number): DataTransferItem;
-    remove(index: number): void;
-    [index: number]: DataTransferItem;
-}
-
-declare var DataTransferItemList: {
-    prototype: DataTransferItemList;
-    new(): DataTransferItemList;
-}
-
-interface DeferredPermissionRequest {
-    readonly id: number;
-    readonly type: string;
-    readonly uri: string;
-    allow(): void;
-    deny(): void;
-}
-
-declare var DeferredPermissionRequest: {
-    prototype: DeferredPermissionRequest;
-    new(): DeferredPermissionRequest;
-}
-
-interface DelayNode extends AudioNode {
-    readonly delayTime: AudioParam;
-}
-
-declare var DelayNode: {
-    prototype: DelayNode;
-    new(): DelayNode;
-}
-
-interface DeviceAcceleration {
-    readonly x: number | null;
-    readonly y: number | null;
-    readonly z: number | null;
-}
-
-declare var DeviceAcceleration: {
-    prototype: DeviceAcceleration;
-    new(): DeviceAcceleration;
-}
-
-interface DeviceLightEvent extends Event {
-    readonly value: number;
-}
-
-declare var DeviceLightEvent: {
-    prototype: DeviceLightEvent;
-    new(type: string, eventInitDict?: DeviceLightEventInit): DeviceLightEvent;
-}
-
-interface DeviceMotionEvent extends Event {
-    readonly acceleration: DeviceAcceleration | null;
-    readonly accelerationIncludingGravity: DeviceAcceleration | null;
-    readonly interval: number | null;
-    readonly rotationRate: DeviceRotationRate | null;
-    initDeviceMotionEvent(type: string, bubbles: boolean, cancelable: boolean, acceleration: DeviceAccelerationDict | null, accelerationIncludingGravity: DeviceAccelerationDict | null, rotationRate: DeviceRotationRateDict | null, interval: number | null): void;
-}
-
-declare var DeviceMotionEvent: {
-    prototype: DeviceMotionEvent;
-    new(): DeviceMotionEvent;
-}
-
-interface DeviceOrientationEvent extends Event {
-    readonly absolute: boolean;
-    readonly alpha: number | null;
-    readonly beta: number | null;
-    readonly gamma: number | null;
-    initDeviceOrientationEvent(type: string, bubbles: boolean, cancelable: boolean, alpha: number | null, beta: number | null, gamma: number | null, absolute: boolean): void;
-}
-
-declare var DeviceOrientationEvent: {
-    prototype: DeviceOrientationEvent;
-    new(): DeviceOrientationEvent;
-}
-
-interface DeviceRotationRate {
-    readonly alpha: number | null;
-    readonly beta: number | null;
-    readonly gamma: number | null;
-}
-
-declare var DeviceRotationRate: {
-    prototype: DeviceRotationRate;
-    new(): DeviceRotationRate;
-}
-
-interface Document extends Node, GlobalEventHandlers, NodeSelector, DocumentEvent, ParentNode {
-    /**
-      * Sets or gets the URL for the current document. 
-      */
-    readonly URL: string;
-    /**
-      * Gets the URL for the document, stripped of any character encoding.
-      */
-    readonly URLUnencoded: string;
-    /**
-      * Gets the object that has the focus when the parent document has focus.
-      */
-    readonly activeElement: Element;
-    /**
-      * Sets or gets the color of all active links in the document.
-      */
-    alinkColor: string;
-    /**
-      * Returns a reference to the collection of elements contained by the object.
-      */
-    readonly all: HTMLAllCollection;
-    /**
-      * Retrieves a collection of all a objects that have a name and/or id property. Objects in this collection are in HTML source order.
-      */
-    anchors: HTMLCollectionOf<HTMLAnchorElement>;
-    /**
-      * Retrieves a collection of all applet objects in the document.
-      */
-    applets: HTMLCollectionOf<HTMLAppletElement>;
-    /**
-      * Deprecated. Sets or retrieves a value that indicates the background color behind the object. 
-      */
-    bgColor: string;
-    /**
-      * Specifies the beginning and end of the document body.
-      */
-    body: HTMLElement;
-    readonly characterSet: string;
-    /**
-      * Gets or sets the character set used to encode the object.
-      */
-    charset: string;
-    /**
-      * Gets a value that indicates whether standards-compliant mode is switched on for the object.
-      */
-    readonly compatMode: string;
-    cookie: string;
-    readonly currentScript: HTMLScriptElement | SVGScriptElement;
-    /**
-      * Gets the default character set from the current regional language settings.
-      */
-    readonly defaultCharset: string;
-    readonly defaultView: Window;
-    /**
-      * Sets or gets a value that indicates whether the document can be edited.
-      */
-    designMode: string;
-    /**
-      * Sets or retrieves a value that indicates the reading order of the object. 
-      */
-    dir: string;
-    /**
-      * Gets an object representing the document type declaration associated with the current document. 
-      */
-    readonly doctype: DocumentType;
-    /**
-      * Gets a reference to the root node of the document. 
-      */
-    documentElement: HTMLElement;
-    /**
-      * Sets or gets the security domain of the document. 
-      */
-    domain: string;
-    /**
-      * Retrieves a collection of all embed objects in the document.
-      */
-    embeds: HTMLCollectionOf<HTMLEmbedElement>;
-    /**
-      * Sets or gets the foreground (text) color of the document.
-      */
-    fgColor: string;
-    /**
-      * Retrieves a collection, in source order, of all form objects in the document.
-      */
-    forms: HTMLCollectionOf<HTMLFormElement>;
-    readonly fullscreenElement: Element | null;
-    readonly fullscreenEnabled: boolean;
-    readonly head: HTMLHeadElement;
-    readonly hidden: boolean;
-    /**
-      * Retrieves a collection, in source order, of img objects in the document.
-      */
-    images: HTMLCollectionOf<HTMLImageElement>;
-    /**
-      * Gets the implementation object of the current document. 
-      */
-    readonly implementation: DOMImplementation;
-    /**
-      * Returns the character encoding used to create the webpage that is loaded into the document object.
-      */
-    readonly inputEncoding: string | null;
-    /**
-      * Gets the date that the page was last modified, if the page supplies one. 
-      */
-    readonly lastModified: string;
-    /**
-      * Sets or gets the color of the document links. 
-      */
-    linkColor: string;
-    /**
-      * Retrieves a collection of all a objects that specify the href property and all area objects in the document.
-      */
-    links: HTMLCollectionOf<HTMLAnchorElement | HTMLAreaElement>;
-    /**
-      * Contains information about the current URL. 
-      */
-    readonly location: Location;
-    msCSSOMElementFloatMetrics: boolean;
-    msCapsLockWarningOff: boolean;
-    /**
-      * Fires when the user aborts the download.
-      * @param ev The event.
-      */
-    onabort: (this: this, ev: UIEvent) => any;
-    /**
-      * Fires when the object is set as the active element.
-      * @param ev The event.
-      */
-    onactivate: (this: this, ev: UIEvent) => any;
-    /**
-      * Fires immediately before the object is set as the active element.
-      * @param ev The event.
-      */
-    onbeforeactivate: (this: this, ev: UIEvent) => any;
-    /**
-      * Fires immediately before the activeElement is changed from the current object to another object in the parent document.
-      * @param ev The event.
-      */
-    onbeforedeactivate: (this: this, ev: UIEvent) => any;
-    /** 
-      * Fires when the object loses the input focus. 
-      * @param ev The focus event.
-      */
-    onblur: (this: this, ev: FocusEvent) => any;
-    /**
-      * Occurs when playback is possible, but would require further buffering. 
-      * @param ev The event.
-      */
-    oncanplay: (this: this, ev: Event) => any;
-    oncanplaythrough: (this: this, ev: Event) => any;
-    /**
-      * Fires when the contents of the object or selection have changed. 
-      * @param ev The event.
-      */
-    onchange: (this: this, ev: Event) => any;
-    /**
-      * Fires when the user clicks the left mouse button on the object
-      * @param ev The mouse event.
-      */
-    onclick: (this: this, ev: MouseEvent) => any;
-    /**
-      * Fires when the user clicks the right mouse button in the client area, opening the context menu. 
-      * @param ev The mouse event.
-      */
-    oncontextmenu: (this: this, ev: PointerEvent) => any;
-    /**
-      * Fires when the user double-clicks the object.
-      * @param ev The mouse event.
-      */
-    ondblclick: (this: this, ev: MouseEvent) => any;
-    /**
-      * Fires when the activeElement is changed from the current object to another object in the parent document.
-      * @param ev The UI Event
-      */
-    ondeactivate: (this: this, ev: UIEvent) => any;
-    /**
-      * Fires on the source object continuously during a drag operation.
-      * @param ev The event.
-      */
-    ondrag: (this: this, ev: DragEvent) => any;
-    /**
-      * Fires on the source object when the user releases the mouse at the close of a drag operation.
-      * @param ev The event.
-      */
-    ondragend: (this: this, ev: DragEvent) => any;
-    /** 
-      * Fires on the target element when the user drags the object to a valid drop target.
-      * @param ev The drag event.
-      */
-    ondragenter: (this: this, ev: DragEvent) => any;
-    /** 
-      * Fires on the target object when the user moves the mouse out of a valid drop target during a drag operation.
-      * @param ev The drag event.
-      */
-    ondragleave: (this: this, ev: DragEvent) => any;
-    /**
-      * Fires on the target element continuously while the user drags the object over a valid drop target.
-      * @param ev The event.
-      */
-    ondragover: (this: this, ev: DragEvent) => any;
-    /**
-      * Fires on the source object when the user starts to drag a text selection or selected object. 
-      * @param ev The event.
-      */
-    ondragstart: (this: this, ev: DragEvent) => any;
-    ondrop: (this: this, ev: DragEvent) => any;
-    /**
-      * Occurs when the duration attribute is updated. 
-      * @param ev The event.
-      */
-    ondurationchange: (this: this, ev: Event) => any;
-    /**
-      * Occurs when the media element is reset to its initial state. 
-      * @param ev The event.
-      */
-    onemptied: (this: this, ev: Event) => any;
-    /**
-      * Occurs when the end of playback is reached. 
-      * @param ev The event
-      */
-    onended: (this: this, ev: MediaStreamErrorEvent) => any;
-    /**
-      * Fires when an error occurs during object loading.
-      * @param ev The event.
-      */
-    onerror: (this: this, ev: ErrorEvent) => any;
-    /**
-      * Fires when the object receives focus. 
-      * @param ev The event.
-      */
-    onfocus: (this: this, ev: FocusEvent) => any;
-    onfullscreenchange: (this: this, ev: Event) => any;
-    onfullscreenerror: (this: this, ev: Event) => any;
-    oninput: (this: this, ev: Event) => any;
-    oninvalid: (this: this, ev: Event) => any;
-    /**
-      * Fires when the user presses a key.
-      * @param ev The keyboard event
-      */
-    onkeydown: (this: this, ev: KeyboardEvent) => any;
-    /**
-      * Fires when the user presses an alphanumeric key.
-      * @param ev The event.
-      */
-    onkeypress: (this: this, ev: KeyboardEvent) => any;
-    /**
-      * Fires when the user releases a key.
-      * @param ev The keyboard event
-      */
-    onkeyup: (this: this, ev: KeyboardEvent) => any;
-    /**
-      * Fires immediately after the browser loads the object. 
-      * @param ev The event.
-      */
-    onload: (this: this, ev: Event) => any;
-    /**
-      * Occurs when media data is loaded at the current playback position. 
-      * @param ev The event.
-      */
-    onloadeddata: (this: this, ev: Event) => any;
-    /**
-      * Occurs when the duration and dimensions of the media have been determined.
-      * @param ev The event.
-      */
-    onloadedmetadata: (this: this, ev: Event) => any;
-    /**
-      * Occurs when Internet Explorer begins looking for media data. 
-      * @param ev The event.
-      */
-    onloadstart: (this: this, ev: Event) => any;
-    /**
-      * Fires when the user clicks the object with either mouse button. 
-      * @param ev The mouse event.
-      */
-    onmousedown: (this: this, ev: MouseEvent) => any;
-    /**
-      * Fires when the user moves the mouse over the object. 
-      * @param ev The mouse event.
-      */
-    onmousemove: (this: this, ev: MouseEvent) => any;
-    /**
-      * Fires when the user moves the mouse pointer outside the boundaries of the object. 
-      * @param ev The mouse event.
-      */
-    onmouseout: (this: this, ev: MouseEvent) => any;
-    /**
-      * Fires when the user moves the mouse pointer into the object.
-      * @param ev The mouse event.
-      */
-    onmouseover: (this: this, ev: MouseEvent) => any;
-    /**
-      * Fires when the user releases a mouse button while the mouse is over the object. 
-      * @param ev The mouse event.
-      */
-    onmouseup: (this: this, ev: MouseEvent) => any;
-    /**
-      * Fires when the wheel button is rotated. 
-      * @param ev The mouse event
-      */
-    onmousewheel: (this: this, ev: WheelEvent) => any;
-    onmscontentzoom: (this: this, ev: UIEvent) => any;
-    onmsgesturechange: (this: this, ev: MSGestureEvent) => any;
-    onmsgesturedoubletap: (this: this, ev: MSGestureEvent) => any;
-    onmsgestureend: (this: this, ev: MSGestureEvent) => any;
-    onmsgesturehold: (this: this, ev: MSGestureEvent) => any;
-    onmsgesturestart: (this: this, ev: MSGestureEvent) => any;
-    onmsgesturetap: (this: this, ev: MSGestureEvent) => any;
-    onmsinertiastart: (this: this, ev: MSGestureEvent) => any;
-    onmsmanipulationstatechanged: (this: this, ev: MSManipulationEvent) => any;
-    onmspointercancel: (this: this, ev: MSPointerEvent) => any;
-    onmspointerdown: (this: this, ev: MSPointerEvent) => any;
-    onmspointerenter: (this: this, ev: MSPointerEvent) => any;
-    onmspointerleave: (this: this, ev: MSPointerEvent) => any;
-    onmspointermove: (this: this, ev: MSPointerEvent) => any;
-    onmspointerout: (this: this, ev: MSPointerEvent) => any;
-    onmspointerover: (this: this, ev: MSPointerEvent) => any;
-    onmspointerup: (this: this, ev: MSPointerEvent) => any;
-    /**
-      * Occurs when an item is removed from a Jump List of a webpage running in Site Mode. 
-      * @param ev The event.
-      */
-    onmssitemodejumplistitemremoved: (this: this, ev: MSSiteModeEvent) => any;
-    /**
-      * Occurs when a user clicks a button in a Thumbnail Toolbar of a webpage running in Site Mode.
-      * @param ev The event.
-      */
-    onmsthumbnailclick: (this: this, ev: MSSiteModeEvent) => any;
-    /**
-      * Occurs when playback is paused.
-      * @param ev The event.
-      */
-    onpause: (this: this, ev: Event) => any;
-    /**
-      * Occurs when the play method is requested. 
-      * @param ev The event.
-      */
-    onplay: (this: this, ev: Event) => any;
-    /**
-      * Occurs when the audio or video has started playing. 
-      * @param ev The event.
-      */
-    onplaying: (this: this, ev: Event) => any;
-    onpointerlockchange: (this: this, ev: Event) => any;
-    onpointerlockerror: (this: this, ev: Event) => any;
-    /**
-      * Occurs to indicate progress while downloading media data. 
-      * @param ev The event.
-      */
-    onprogress: (this: this, ev: ProgressEvent) => any;
-    /**
-      * Occurs when the playback rate is increased or decreased. 
-      * @param ev The event.
-      */
-    onratechange: (this: this, ev: Event) => any;
-    /**
-      * Fires when the state of the object has changed.
-      * @param ev The event
-      */
-    onreadystatechange: (this: this, ev: ProgressEvent) => any;
-    /**
-      * Fires when the user resets a form. 
-      * @param ev The event.
-      */
-    onreset: (this: this, ev: Event) => any;
-    /**
-      * Fires when the user repositions the scroll box in the scroll bar on the object. 
-      * @param ev The event.
-      */
-    onscroll: (this: this, ev: UIEvent) => any;
-    /**
-      * Occurs when the seek operation ends. 
-      * @param ev The event.
-      */
-    onseeked: (this: this, ev: Event) => any;
-    /**
-      * Occurs when the current playback position is moved. 
-      * @param ev The event.
-      */
-    onseeking: (this: this, ev: Event) => any;
-    /**
-      * Fires when the current selection changes.
-      * @param ev The event.
-      */
-    onselect: (this: this, ev: UIEvent) => any;
-    /**
-      * Fires when the selection state of a document changes.
-      * @param ev The event.
-      */
-    onselectionchange: (this: this, ev: Event) => any;
-    onselectstart: (this: this, ev: Event) => any;
-    /**
-      * Occurs when the download has stopped. 
-      * @param ev The event.
-      */
-    onstalled: (this: this, ev: Event) => any;
-    /**
-      * Fires when the user clicks the Stop button or leaves the Web page.
-      * @param ev The event.
-      */
-    onstop: (this: this, ev: Event) => any;
-    onsubmit: (this: this, ev: Event) => any;
-    /**
-      * Occurs if the load operation has been intentionally halted. 
-      * @param ev The event.
-      */
-    onsuspend: (this: this, ev: Event) => any;
-    /**
-      * Occurs to indicate the current playback position.
-      * @param ev The event.
-      */
-    ontimeupdate: (this: this, ev: Event) => any;
-    ontouchcancel: (ev: TouchEvent) => any;
-    ontouchend: (ev: TouchEvent) => any;
-    ontouchmove: (ev: TouchEvent) => any;
-    ontouchstart: (ev: TouchEvent) => any;
-    /**
-      * Occurs when the volume is changed, or playback is muted or unmuted.
-      * @param ev The event.
-      */
-    onvolumechange: (this: this, ev: Event) => any;
-    /**
-      * Occurs when playback stops because the next frame of a video resource is not available. 
-      * @param ev The event.
-      */
-    onwaiting: (this: this, ev: Event) => any;
-    onwebkitfullscreenchange: (this: this, ev: Event) => any;
-    onwebkitfullscreenerror: (this: this, ev: Event) => any;
-    plugins: HTMLCollectionOf<HTMLEmbedElement>;
-    readonly pointerLockElement: Element;
-    /**
-      * Retrieves a value that indicates the current state of the object.
-      */
-    readonly readyState: string;
-    /**
-      * Gets the URL of the location that referred the user to the current page.
-      */
-    readonly referrer: string;
-    /**
-      * Gets the root svg element in the document hierarchy.
-      */
-    readonly rootElement: SVGSVGElement;
-    /**
-      * Retrieves a collection of all script objects in the document.
-      */
-    scripts: HTMLCollectionOf<HTMLScriptElement>;
-    readonly scrollingElement: Element | null;
-    /**
-      * Retrieves a collection of styleSheet objects representing the style sheets that correspond to each instance of a link or style object in the document.
-      */
-    readonly styleSheets: StyleSheetList;
-    /**
-      * Contains the title of the document.
-      */
-    title: string;
-    readonly visibilityState: string;
-    /** 
-      * Sets or gets the color of the links that the user has visited.
-      */
-    vlinkColor: string;
-    readonly webkitCurrentFullScreenElement: Element | null;
-    readonly webkitFullscreenElement: Element | null;
-    readonly webkitFullscreenEnabled: boolean;
-    readonly webkitIsFullScreen: boolean;
-    readonly xmlEncoding: string | null;
-    xmlStandalone: boolean;
-    /**
-      * Gets or sets the version attribute specified in the declaration of an XML document.
-      */
-    xmlVersion: string | null;
-    adoptNode(source: Node): Node;
-    captureEvents(): void;
-    caretRangeFromPoint(x: number, y: number): Range;
-    clear(): void;
-    /**
-      * Closes an output stream and forces the sent data to display.
-      */
-    close(): void;
-    /**
-      * Creates an attribute object with a specified name.
-      * @param name String that sets the attribute object's name.
-      */
-    createAttribute(name: string): Attr;
-    createAttributeNS(namespaceURI: string | null, qualifiedName: string): Attr;
-    createCDATASection(data: string): CDATASection;
-    /**
-      * Creates a comment object with the specified data.
-      * @param data Sets the comment object's data.
-      */
-    createComment(data: string): Comment;
-    /**
-      * Creates a new document.
-      */
-    createDocumentFragment(): DocumentFragment;
-    /**
-      * Creates an instance of the element for the specified tag.
-      * @param tagName The name of an element.
-      */
-    createElement(tagName: "a"): HTMLAnchorElement;
-    createElement(tagName: "applet"): HTMLAppletElement;
-    createElement(tagName: "area"): HTMLAreaElement;
-    createElement(tagName: "audio"): HTMLAudioElement;
-    createElement(tagName: "base"): HTMLBaseElement;
-    createElement(tagName: "basefont"): HTMLBaseFontElement;
-    createElement(tagName: "blockquote"): HTMLQuoteElement;
-    createElement(tagName: "body"): HTMLBodyElement;
-    createElement(tagName: "br"): HTMLBRElement;
-    createElement(tagName: "button"): HTMLButtonElement;
-    createElement(tagName: "canvas"): HTMLCanvasElement;
-    createElement(tagName: "caption"): HTMLTableCaptionElement;
-    createElement(tagName: "col"): HTMLTableColElement;
-    createElement(tagName: "colgroup"): HTMLTableColElement;
-    createElement(tagName: "datalist"): HTMLDataListElement;
-    createElement(tagName: "del"): HTMLModElement;
-    createElement(tagName: "dir"): HTMLDirectoryElement;
-    createElement(tagName: "div"): HTMLDivElement;
-    createElement(tagName: "dl"): HTMLDListElement;
-    createElement(tagName: "embed"): HTMLEmbedElement;
-    createElement(tagName: "fieldset"): HTMLFieldSetElement;
-    createElement(tagName: "font"): HTMLFontElement;
-    createElement(tagName: "form"): HTMLFormElement;
-    createElement(tagName: "frame"): HTMLFrameElement;
-    createElement(tagName: "frameset"): HTMLFrameSetElement;
-    createElement(tagName: "h1"): HTMLHeadingElement;
-    createElement(tagName: "h2"): HTMLHeadingElement;
-    createElement(tagName: "h3"): HTMLHeadingElement;
-    createElement(tagName: "h4"): HTMLHeadingElement;
-    createElement(tagName: "h5"): HTMLHeadingElement;
-    createElement(tagName: "h6"): HTMLHeadingElement;
-    createElement(tagName: "head"): HTMLHeadElement;
-    createElement(tagName: "hr"): HTMLHRElement;
-    createElement(tagName: "html"): HTMLHtmlElement;
-    createElement(tagName: "iframe"): HTMLIFrameElement;
-    createElement(tagName: "img"): HTMLImageElement;
-    createElement(tagName: "input"): HTMLInputElement;
-    createElement(tagName: "ins"): HTMLModElement;
-    createElement(tagName: "isindex"): HTMLUnknownElement;
-    createElement(tagName: "label"): HTMLLabelElement;
-    createElement(tagName: "legend"): HTMLLegendElement;
-    createElement(tagName: "li"): HTMLLIElement;
-    createElement(tagName: "link"): HTMLLinkElement;
-    createElement(tagName: "listing"): HTMLPreElement;
-    createElement(tagName: "map"): HTMLMapElement;
-    createElement(tagName: "marquee"): HTMLMarqueeElement;
-    createElement(tagName: "menu"): HTMLMenuElement;
-    createElement(tagName: "meta"): HTMLMetaElement;
-    createElement(tagName: "meter"): HTMLMeterElement;
-    createElement(tagName: "nextid"): HTMLUnknownElement;
-    createElement(tagName: "object"): HTMLObjectElement;
-    createElement(tagName: "ol"): HTMLOListElement;
-    createElement(tagName: "optgroup"): HTMLOptGroupElement;
-    createElement(tagName: "option"): HTMLOptionElement;
-    createElement(tagName: "p"): HTMLParagraphElement;
-    createElement(tagName: "param"): HTMLParamElement;
-    createElement(tagName: "picture"): HTMLPictureElement;
-    createElement(tagName: "pre"): HTMLPreElement;
-    createElement(tagName: "progress"): HTMLProgressElement;
-    createElement(tagName: "q"): HTMLQuoteElement;
-    createElement(tagName: "script"): HTMLScriptElement;
-    createElement(tagName: "select"): HTMLSelectElement;
-    createElement(tagName: "source"): HTMLSourceElement;
-    createElement(tagName: "span"): HTMLSpanElement;
-    createElement(tagName: "style"): HTMLStyleElement;
-    createElement(tagName: "table"): HTMLTableElement;
-    createElement(tagName: "tbody"): HTMLTableSectionElement;
-    createElement(tagName: "td"): HTMLTableDataCellElement;
-    createElement(tagName: "template"): HTMLTemplateElement;
-    createElement(tagName: "textarea"): HTMLTextAreaElement;
-    createElement(tagName: "tfoot"): HTMLTableSectionElement;
-    createElement(tagName: "th"): HTMLTableHeaderCellElement;
-    createElement(tagName: "thead"): HTMLTableSectionElement;
-    createElement(tagName: "title"): HTMLTitleElement;
-    createElement(tagName: "tr"): HTMLTableRowElement;
-    createElement(tagName: "track"): HTMLTrackElement;
-    createElement(tagName: "ul"): HTMLUListElement;
-    createElement(tagName: "video"): HTMLVideoElement;
-    createElement(tagName: "x-ms-webview"): MSHTMLWebViewElement;
-    createElement(tagName: "xmp"): HTMLPreElement;
-    createElement(tagName: string): HTMLElement;
-    createElementNS(namespaceURI: "http://www.w3.org/1999/xhtml", qualifiedName: string): HTMLElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "a"): SVGAElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "circle"): SVGCircleElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "clipPath"): SVGClipPathElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "componentTransferFunction"): SVGComponentTransferFunctionElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "defs"): SVGDefsElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "desc"): SVGDescElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "ellipse"): SVGEllipseElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feBlend"): SVGFEBlendElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feColorMatrix"): SVGFEColorMatrixElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feComponentTransfer"): SVGFEComponentTransferElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feComposite"): SVGFECompositeElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feConvolveMatrix"): SVGFEConvolveMatrixElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feDiffuseLighting"): SVGFEDiffuseLightingElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feDisplacementMap"): SVGFEDisplacementMapElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feDistantLight"): SVGFEDistantLightElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feFlood"): SVGFEFloodElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feFuncA"): SVGFEFuncAElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feFuncB"): SVGFEFuncBElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feFuncG"): SVGFEFuncGElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feFuncR"): SVGFEFuncRElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feGaussianBlur"): SVGFEGaussianBlurElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feImage"): SVGFEImageElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feMerge"): SVGFEMergeElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feMergeNode"): SVGFEMergeNodeElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feMorphology"): SVGFEMorphologyElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feOffset"): SVGFEOffsetElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "fePointLight"): SVGFEPointLightElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feSpecularLighting"): SVGFESpecularLightingElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feSpotLight"): SVGFESpotLightElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feTile"): SVGFETileElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feTurbulence"): SVGFETurbulenceElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "filter"): SVGFilterElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "foreignObject"): SVGForeignObjectElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "g"): SVGGElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "image"): SVGImageElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "gradient"): SVGGradientElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "line"): SVGLineElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "linearGradient"): SVGLinearGradientElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "marker"): SVGMarkerElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "mask"): SVGMaskElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "path"): SVGPathElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "metadata"): SVGMetadataElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "pattern"): SVGPatternElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "polygon"): SVGPolygonElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "polyline"): SVGPolylineElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "radialGradient"): SVGRadialGradientElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "rect"): SVGRectElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "svg"): SVGSVGElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "script"): SVGScriptElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "stop"): SVGStopElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "style"): SVGStyleElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "switch"): SVGSwitchElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "symbol"): SVGSymbolElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "tspan"): SVGTSpanElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "textContent"): SVGTextContentElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "text"): SVGTextElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "textPath"): SVGTextPathElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "textPositioning"): SVGTextPositioningElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "title"): SVGTitleElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "use"): SVGUseElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "view"): SVGViewElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: string): SVGElement
-    createElementNS(namespaceURI: string | null, qualifiedName: string): Element;
-    createExpression(expression: string, resolver: XPathNSResolver): XPathExpression;
-    createNSResolver(nodeResolver: Node): XPathNSResolver;
-    /**
-      * Creates a NodeIterator object that you can use to traverse filtered lists of nodes or elements in a document. 
-      * @param root The root element or node to start traversing on.
-      * @param whatToShow The type of nodes or elements to appear in the node list
-      * @param filter A custom NodeFilter function to use. For more information, see filter. Use null for no filter.
-      * @param entityReferenceExpansion A flag that specifies whether entity reference nodes are expanded.
-      */
-    createNodeIterator(root: Node, whatToShow?: number, filter?: NodeFilter, entityReferenceExpansion?: boolean): NodeIterator;
-    createProcessingInstruction(target: string, data: string): ProcessingInstruction;
-    /**
-      *  Returns an empty range object that has both of its boundary points positioned at the beginning of the document. 
-      */
-    createRange(): Range;
-    /**
-      * Creates a text string from the specified value. 
-      * @param data String that specifies the nodeValue property of the text node.
-      */
-    createTextNode(data: string): Text;
-    createTouch(view: Window, target: EventTarget, identifier: number, pageX: number, pageY: number, screenX: number, screenY: number): Touch;
-    createTouchList(...touches: Touch[]): TouchList;
-    /**
-      * Creates a TreeWalker object that you can use to traverse filtered lists of nodes or elements in a document.
-      * @param root The root element or node to start traversing on.
-      * @param whatToShow The type of nodes or elements to appear in the node list. For more information, see whatToShow.
-      * @param filter A custom NodeFilter function to use.
-      * @param entityReferenceExpansion A flag that specifies whether entity reference nodes are expanded.
-      */
-    createTreeWalker(root: Node, whatToShow?: number, filter?: NodeFilter, entityReferenceExpansion?: boolean): TreeWalker;
-    /**
-      * Returns the element for the specified x coordinate and the specified y coordinate. 
-      * @param x The x-offset
-      * @param y The y-offset
-      */
-    elementFromPoint(x: number, y: number): Element;
-    evaluate(expression: string, contextNode: Node, resolver: XPathNSResolver, type: number, result: XPathResult): XPathResult;
-    /**
-      * Executes a command on the current document, current selection, or the given range.
-      * @param commandId String that specifies the command to execute. This command can be any of the command identifiers that can be executed in script.
-      * @param showUI Display the user interface, defaults to false.
-      * @param value Value to assign.
-      */
-    execCommand(commandId: string, showUI?: boolean, value?: any): boolean;
-    /**
-      * Displays help information for the given command identifier.
-      * @param commandId Displays help information for the given command identifier.
-      */
-    execCommandShowHelp(commandId: string): boolean;
-    exitFullscreen(): void;
-    exitPointerLock(): void;
-    /**
-      * Causes the element to receive the focus and executes the code specified by the onfocus event.
-      */
-    focus(): void;
-    /**
-      * Returns a reference to the first object with the specified value of the ID or NAME attribute.
-      * @param elementId String that specifies the ID value. Case-insensitive.
-      */
-    getElementById(elementId: string): HTMLElement | null;
-    getElementsByClassName(classNames: string): HTMLCollectionOf<Element>;
-    /**
-      * Gets a collection of objects based on the value of the NAME or ID attribute.
-      * @param elementName Gets a collection of objects based on the value of the NAME or ID attribute.
-      */
-    getElementsByName(elementName: string): NodeListOf<HTMLElement>;
-    /**
-      * Retrieves a collection of objects based on the specified element name.
-      * @param name Specifies the name of an element.
-      */
-    getElementsByTagName(tagname: "a"): NodeListOf<HTMLAnchorElement>;
-    getElementsByTagName(tagname: "abbr"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "acronym"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "address"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "applet"): NodeListOf<HTMLAppletElement>;
-    getElementsByTagName(tagname: "area"): NodeListOf<HTMLAreaElement>;
-    getElementsByTagName(tagname: "article"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "aside"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "audio"): NodeListOf<HTMLAudioElement>;
-    getElementsByTagName(tagname: "b"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "base"): NodeListOf<HTMLBaseElement>;
-    getElementsByTagName(tagname: "basefont"): NodeListOf<HTMLBaseFontElement>;
-    getElementsByTagName(tagname: "bdo"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "big"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "blockquote"): NodeListOf<HTMLQuoteElement>;
-    getElementsByTagName(tagname: "body"): NodeListOf<HTMLBodyElement>;
-    getElementsByTagName(tagname: "br"): NodeListOf<HTMLBRElement>;
-    getElementsByTagName(tagname: "button"): NodeListOf<HTMLButtonElement>;
-    getElementsByTagName(tagname: "canvas"): NodeListOf<HTMLCanvasElement>;
-    getElementsByTagName(tagname: "caption"): NodeListOf<HTMLTableCaptionElement>;
-    getElementsByTagName(tagname: "center"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "circle"): NodeListOf<SVGCircleElement>;
-    getElementsByTagName(tagname: "cite"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "clippath"): NodeListOf<SVGClipPathElement>;
-    getElementsByTagName(tagname: "code"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "col"): NodeListOf<HTMLTableColElement>;
-    getElementsByTagName(tagname: "colgroup"): NodeListOf<HTMLTableColElement>;
-    getElementsByTagName(tagname: "datalist"): NodeListOf<HTMLDataListElement>;
-    getElementsByTagName(tagname: "dd"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "defs"): NodeListOf<SVGDefsElement>;
-    getElementsByTagName(tagname: "del"): NodeListOf<HTMLModElement>;
-    getElementsByTagName(tagname: "desc"): NodeListOf<SVGDescElement>;
-    getElementsByTagName(tagname: "dfn"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "dir"): NodeListOf<HTMLDirectoryElement>;
-    getElementsByTagName(tagname: "div"): NodeListOf<HTMLDivElement>;
-    getElementsByTagName(tagname: "dl"): NodeListOf<HTMLDListElement>;
-    getElementsByTagName(tagname: "dt"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "ellipse"): NodeListOf<SVGEllipseElement>;
-    getElementsByTagName(tagname: "em"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "embed"): NodeListOf<HTMLEmbedElement>;
-    getElementsByTagName(tagname: "feblend"): NodeListOf<SVGFEBlendElement>;
-    getElementsByTagName(tagname: "fecolormatrix"): NodeListOf<SVGFEColorMatrixElement>;
-    getElementsByTagName(tagname: "fecomponenttransfer"): NodeListOf<SVGFEComponentTransferElement>;
-    getElementsByTagName(tagname: "fecomposite"): NodeListOf<SVGFECompositeElement>;
-    getElementsByTagName(tagname: "feconvolvematrix"): NodeListOf<SVGFEConvolveMatrixElement>;
-    getElementsByTagName(tagname: "fediffuselighting"): NodeListOf<SVGFEDiffuseLightingElement>;
-    getElementsByTagName(tagname: "fedisplacementmap"): NodeListOf<SVGFEDisplacementMapElement>;
-    getElementsByTagName(tagname: "fedistantlight"): NodeListOf<SVGFEDistantLightElement>;
-    getElementsByTagName(tagname: "feflood"): NodeListOf<SVGFEFloodElement>;
-    getElementsByTagName(tagname: "fefunca"): NodeListOf<SVGFEFuncAElement>;
-    getElementsByTagName(tagname: "fefuncb"): NodeListOf<SVGFEFuncBElement>;
-    getElementsByTagName(tagname: "fefuncg"): NodeListOf<SVGFEFuncGElement>;
-    getElementsByTagName(tagname: "fefuncr"): NodeListOf<SVGFEFuncRElement>;
-    getElementsByTagName(tagname: "fegaussianblur"): NodeListOf<SVGFEGaussianBlurElement>;
-    getElementsByTagName(tagname: "feimage"): NodeListOf<SVGFEImageElement>;
-    getElementsByTagName(tagname: "femerge"): NodeListOf<SVGFEMergeElement>;
-    getElementsByTagName(tagname: "femergenode"): NodeListOf<SVGFEMergeNodeElement>;
-    getElementsByTagName(tagname: "femorphology"): NodeListOf<SVGFEMorphologyElement>;
-    getElementsByTagName(tagname: "feoffset"): NodeListOf<SVGFEOffsetElement>;
-    getElementsByTagName(tagname: "fepointlight"): NodeListOf<SVGFEPointLightElement>;
-    getElementsByTagName(tagname: "fespecularlighting"): NodeListOf<SVGFESpecularLightingElement>;
-    getElementsByTagName(tagname: "fespotlight"): NodeListOf<SVGFESpotLightElement>;
-    getElementsByTagName(tagname: "fetile"): NodeListOf<SVGFETileElement>;
-    getElementsByTagName(tagname: "feturbulence"): NodeListOf<SVGFETurbulenceElement>;
-    getElementsByTagName(tagname: "fieldset"): NodeListOf<HTMLFieldSetElement>;
-    getElementsByTagName(tagname: "figcaption"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "figure"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "filter"): NodeListOf<SVGFilterElement>;
-    getElementsByTagName(tagname: "font"): NodeListOf<HTMLFontElement>;
-    getElementsByTagName(tagname: "footer"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "foreignobject"): NodeListOf<SVGForeignObjectElement>;
-    getElementsByTagName(tagname: "form"): NodeListOf<HTMLFormElement>;
-    getElementsByTagName(tagname: "frame"): NodeListOf<HTMLFrameElement>;
-    getElementsByTagName(tagname: "frameset"): NodeListOf<HTMLFrameSetElement>;
-    getElementsByTagName(tagname: "g"): NodeListOf<SVGGElement>;
-    getElementsByTagName(tagname: "h1"): NodeListOf<HTMLHeadingElement>;
-    getElementsByTagName(tagname: "h2"): NodeListOf<HTMLHeadingElement>;
-    getElementsByTagName(tagname: "h3"): NodeListOf<HTMLHeadingElement>;
-    getElementsByTagName(tagname: "h4"): NodeListOf<HTMLHeadingElement>;
-    getElementsByTagName(tagname: "h5"): NodeListOf<HTMLHeadingElement>;
-    getElementsByTagName(tagname: "h6"): NodeListOf<HTMLHeadingElement>;
-    getElementsByTagName(tagname: "head"): NodeListOf<HTMLHeadElement>;
-    getElementsByTagName(tagname: "header"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "hgroup"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "hr"): NodeListOf<HTMLHRElement>;
-    getElementsByTagName(tagname: "html"): NodeListOf<HTMLHtmlElement>;
-    getElementsByTagName(tagname: "i"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "iframe"): NodeListOf<HTMLIFrameElement>;
-    getElementsByTagName(tagname: "image"): NodeListOf<SVGImageElement>;
-    getElementsByTagName(tagname: "img"): NodeListOf<HTMLImageElement>;
-    getElementsByTagName(tagname: "input"): NodeListOf<HTMLInputElement>;
-    getElementsByTagName(tagname: "ins"): NodeListOf<HTMLModElement>;
-    getElementsByTagName(tagname: "isindex"): NodeListOf<HTMLUnknownElement>;
-    getElementsByTagName(tagname: "kbd"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "keygen"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "label"): NodeListOf<HTMLLabelElement>;
-    getElementsByTagName(tagname: "legend"): NodeListOf<HTMLLegendElement>;
-    getElementsByTagName(tagname: "li"): NodeListOf<HTMLLIElement>;
-    getElementsByTagName(tagname: "line"): NodeListOf<SVGLineElement>;
-    getElementsByTagName(tagname: "lineargradient"): NodeListOf<SVGLinearGradientElement>;
-    getElementsByTagName(tagname: "link"): NodeListOf<HTMLLinkElement>;
-    getElementsByTagName(tagname: "listing"): NodeListOf<HTMLPreElement>;
-    getElementsByTagName(tagname: "map"): NodeListOf<HTMLMapElement>;
-    getElementsByTagName(tagname: "mark"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "marker"): NodeListOf<SVGMarkerElement>;
-    getElementsByTagName(tagname: "marquee"): NodeListOf<HTMLMarqueeElement>;
-    getElementsByTagName(tagname: "mask"): NodeListOf<SVGMaskElement>;
-    getElementsByTagName(tagname: "menu"): NodeListOf<HTMLMenuElement>;
-    getElementsByTagName(tagname: "meta"): NodeListOf<HTMLMetaElement>;
-    getElementsByTagName(tagname: "metadata"): NodeListOf<SVGMetadataElement>;
-    getElementsByTagName(tagname: "meter"): NodeListOf<HTMLMeterElement>;
-    getElementsByTagName(tagname: "nav"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "nextid"): NodeListOf<HTMLUnknownElement>;
-    getElementsByTagName(tagname: "nobr"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "noframes"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "noscript"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "object"): NodeListOf<HTMLObjectElement>;
-    getElementsByTagName(tagname: "ol"): NodeListOf<HTMLOListElement>;
-    getElementsByTagName(tagname: "optgroup"): NodeListOf<HTMLOptGroupElement>;
-    getElementsByTagName(tagname: "option"): NodeListOf<HTMLOptionElement>;
-    getElementsByTagName(tagname: "p"): NodeListOf<HTMLParagraphElement>;
-    getElementsByTagName(tagname: "param"): NodeListOf<HTMLParamElement>;
-    getElementsByTagName(tagname: "path"): NodeListOf<SVGPathElement>;
-    getElementsByTagName(tagname: "pattern"): NodeListOf<SVGPatternElement>;
-    getElementsByTagName(tagname: "picture"): NodeListOf<HTMLPictureElement>;
-    getElementsByTagName(tagname: "plaintext"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "polygon"): NodeListOf<SVGPolygonElement>;
-    getElementsByTagName(tagname: "polyline"): NodeListOf<SVGPolylineElement>;
-    getElementsByTagName(tagname: "pre"): NodeListOf<HTMLPreElement>;
-    getElementsByTagName(tagname: "progress"): NodeListOf<HTMLProgressElement>;
-    getElementsByTagName(tagname: "q"): NodeListOf<HTMLQuoteElement>;
-    getElementsByTagName(tagname: "radialgradient"): NodeListOf<SVGRadialGradientElement>;
-    getElementsByTagName(tagname: "rect"): NodeListOf<SVGRectElement>;
-    getElementsByTagName(tagname: "rt"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "ruby"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "s"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "samp"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "script"): NodeListOf<HTMLScriptElement>;
-    getElementsByTagName(tagname: "section"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "select"): NodeListOf<HTMLSelectElement>;
-    getElementsByTagName(tagname: "small"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "source"): NodeListOf<HTMLSourceElement>;
-    getElementsByTagName(tagname: "span"): NodeListOf<HTMLSpanElement>;
-    getElementsByTagName(tagname: "stop"): NodeListOf<SVGStopElement>;
-    getElementsByTagName(tagname: "strike"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "strong"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "style"): NodeListOf<HTMLStyleElement>;
-    getElementsByTagName(tagname: "sub"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "sup"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "svg"): NodeListOf<SVGSVGElement>;
-    getElementsByTagName(tagname: "switch"): NodeListOf<SVGSwitchElement>;
-    getElementsByTagName(tagname: "symbol"): NodeListOf<SVGSymbolElement>;
-    getElementsByTagName(tagname: "table"): NodeListOf<HTMLTableElement>;
-    getElementsByTagName(tagname: "tbody"): NodeListOf<HTMLTableSectionElement>;
-    getElementsByTagName(tagname: "td"): NodeListOf<HTMLTableDataCellElement>;
-    getElementsByTagName(tagname: "template"): NodeListOf<HTMLTemplateElement>;
-    getElementsByTagName(tagname: "text"): NodeListOf<SVGTextElement>;
-    getElementsByTagName(tagname: "textpath"): NodeListOf<SVGTextPathElement>;
-    getElementsByTagName(tagname: "textarea"): NodeListOf<HTMLTextAreaElement>;
-    getElementsByTagName(tagname: "tfoot"): NodeListOf<HTMLTableSectionElement>;
-    getElementsByTagName(tagname: "th"): NodeListOf<HTMLTableHeaderCellElement>;
-    getElementsByTagName(tagname: "thead"): NodeListOf<HTMLTableSectionElement>;
-    getElementsByTagName(tagname: "title"): NodeListOf<HTMLTitleElement>;
-    getElementsByTagName(tagname: "tr"): NodeListOf<HTMLTableRowElement>;
-    getElementsByTagName(tagname: "track"): NodeListOf<HTMLTrackElement>;
-    getElementsByTagName(tagname: "tspan"): NodeListOf<SVGTSpanElement>;
-    getElementsByTagName(tagname: "tt"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "u"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "ul"): NodeListOf<HTMLUListElement>;
-    getElementsByTagName(tagname: "use"): NodeListOf<SVGUseElement>;
-    getElementsByTagName(tagname: "var"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "video"): NodeListOf<HTMLVideoElement>;
-    getElementsByTagName(tagname: "view"): NodeListOf<SVGViewElement>;
-    getElementsByTagName(tagname: "wbr"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "x-ms-webview"): NodeListOf<MSHTMLWebViewElement>;
-    getElementsByTagName(tagname: "xmp"): NodeListOf<HTMLPreElement>;
-    getElementsByTagName(tagname: string): NodeListOf<Element>;
-    getElementsByTagNameNS(namespaceURI: "http://www.w3.org/1999/xhtml", localName: string): HTMLCollectionOf<HTMLElement>;
-    getElementsByTagNameNS(namespaceURI: "http://www.w3.org/2000/svg", localName: string): HTMLCollectionOf<SVGElement>;
-    getElementsByTagNameNS(namespaceURI: string, localName: string): HTMLCollectionOf<Element>;
-    /**
-      * Returns an object representing the current selection of the document that is loaded into the object displaying a webpage.
-      */
-    getSelection(): Selection;
-    /**
-      * Gets a value indicating whether the object currently has focus.
-      */
-    hasFocus(): boolean;
-    importNode(importedNode: Node, deep: boolean): Node;
-    msElementsFromPoint(x: number, y: number): NodeListOf<Element>;
-    msElementsFromRect(left: number, top: number, width: number, height: number): NodeListOf<Element>;
-    /**
-      * Opens a new window and loads a document specified by a given URL. Also, opens a new window that uses the url parameter and the name parameter to collect the output of the write method and the writeln method.
-      * @param url Specifies a MIME type for the document.
-      * @param name Specifies the name of the window. This name is used as the value for the TARGET attribute on a form or an anchor element.
-      * @param features Contains a list of items separated by commas. Each item consists of an option and a value, separated by an equals sign (for example, "fullscreen=yes, toolbar=yes"). The following values are supported.
-      * @param replace Specifies whether the existing entry for the document is replaced in the history list.
-      */
-    open(url?: string, name?: string, features?: string, replace?: boolean): Document;
-    /** 
-      * Returns a Boolean value that indicates whether a specified command can be successfully executed using execCommand, given the current state of the document.
-      * @param commandId Specifies a command identifier.
-      */
-    queryCommandEnabled(commandId: string): boolean;
-    /**
-      * Returns a Boolean value that indicates whether the specified command is in the indeterminate state.
-      * @param commandId String that specifies a command identifier.
-      */
-    queryCommandIndeterm(commandId: string): boolean;
-    /**
-      * Returns a Boolean value that indicates the current state of the command.
-      * @param commandId String that specifies a command identifier.
-      */
-    queryCommandState(commandId: string): boolean;
-    /**
-      * Returns a Boolean value that indicates whether the current command is supported on the current range.
-      * @param commandId Specifies a command identifier.
-      */
-    queryCommandSupported(commandId: string): boolean;
-    /**
-      * Retrieves the string associated with a command.
-      * @param commandId String that contains the identifier of a command. This can be any command identifier given in the list of Command Identifiers. 
-      */
-    queryCommandText(commandId: string): string;
-    /**
-      * Returns the current value of the document, range, or current selection for the given command.
-      * @param commandId String that specifies a command identifier.
-      */
-    queryCommandValue(commandId: string): string;
-    releaseEvents(): void;
-    /**
-      * Allows updating the print settings for the page.
-      */
-    updateSettings(): void;
-    webkitCancelFullScreen(): void;
-    webkitExitFullscreen(): void;
-    /**
-      * Writes one or more HTML expressions to a document in the specified window. 
-      * @param content Specifies the text and HTML tags to write.
-      */
-    write(...content: string[]): void;
-    /**
-      * Writes one or more HTML expressions, followed by a carriage return, to a document in the specified window. 
-      * @param content The text and HTML tags to write.
-      */
-    writeln(...content: string[]): void;
-    addEventListener(type: "MSContentZoom", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureChange", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureDoubleTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureEnd", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureHold", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSInertiaStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSManipulationStateChanged", listener: (this: this, ev: MSManipulationEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerCancel", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerDown", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerEnter", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerLeave", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerMove", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOut", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOver", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerUp", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "abort", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "activate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforedeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "blur", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplay", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplaythrough", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "change", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "click", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "contextmenu", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dblclick", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "deactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drag", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragend", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragenter", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragleave", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragover", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragstart", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drop", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "durationchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "emptied", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "ended", listener: (this: this, ev: MediaStreamErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "focus", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "fullscreenchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "fullscreenerror", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "input", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "invalid", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "keydown", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keypress", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keyup", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadeddata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadedmetadata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousedown", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousemove", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseout", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseover", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseup", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousewheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mssitemodejumplistitemremoved", listener: (this: this, ev: MSSiteModeEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "msthumbnailclick", listener: (this: this, ev: MSSiteModeEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pause", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "play", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "playing", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointercancel", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerdown", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerenter", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerleave", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerlockchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerlockerror", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointermove", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerout", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerover", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerup", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "progress", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ratechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "readystatechange", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "reset", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "scroll", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeked", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeking", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "select", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "selectionchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "selectstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "stalled", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "stop", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "submit", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "suspend", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "timeupdate", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchcancel", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchend", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchmove", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchstart", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "volumechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "waiting", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenerror", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "wheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var Document: {
-    prototype: Document;
-    new(): Document;
-}
-
-interface DocumentFragment extends Node, NodeSelector, ParentNode {
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var DocumentFragment: {
-    prototype: DocumentFragment;
-    new(): DocumentFragment;
-}
-
-interface DocumentType extends Node, ChildNode {
-    readonly entities: NamedNodeMap;
-    readonly internalSubset: string | null;
-    readonly name: string;
-    readonly notations: NamedNodeMap;
-    readonly publicId: string | null;
-    readonly systemId: string | null;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var DocumentType: {
-    prototype: DocumentType;
-    new(): DocumentType;
-}
-
-interface DragEvent extends MouseEvent {
-    readonly dataTransfer: DataTransfer;
-    initDragEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, ctrlKeyArg: boolean, altKeyArg: boolean, shiftKeyArg: boolean, metaKeyArg: boolean, buttonArg: number, relatedTargetArg: EventTarget, dataTransferArg: DataTransfer): void;
-    msConvertURL(file: File, targetType: string, targetURL?: string): void;
-}
-
-declare var DragEvent: {
-    prototype: DragEvent;
-    new(): DragEvent;
-}
-
-interface DynamicsCompressorNode extends AudioNode {
-    readonly attack: AudioParam;
-    readonly knee: AudioParam;
-    readonly ratio: AudioParam;
-    readonly reduction: AudioParam;
-    readonly release: AudioParam;
-    readonly threshold: AudioParam;
-}
-
-declare var DynamicsCompressorNode: {
-    prototype: DynamicsCompressorNode;
-    new(): DynamicsCompressorNode;
-}
-
-interface EXT_frag_depth {
-}
-
-declare var EXT_frag_depth: {
-    prototype: EXT_frag_depth;
-    new(): EXT_frag_depth;
-}
-
-interface EXT_texture_filter_anisotropic {
-    readonly MAX_TEXTURE_MAX_ANISOTROPY_EXT: number;
-    readonly TEXTURE_MAX_ANISOTROPY_EXT: number;
-}
-
-declare var EXT_texture_filter_anisotropic: {
-    prototype: EXT_texture_filter_anisotropic;
-    new(): EXT_texture_filter_anisotropic;
-    readonly MAX_TEXTURE_MAX_ANISOTROPY_EXT: number;
-    readonly TEXTURE_MAX_ANISOTROPY_EXT: number;
-}
-
-interface Element extends Node, GlobalEventHandlers, ElementTraversal, NodeSelector, ChildNode, ParentNode {
-    readonly classList: DOMTokenList;
-    className: string;
-    readonly clientHeight: number;
-    readonly clientLeft: number;
-    readonly clientTop: number;
-    readonly clientWidth: number;
-    id: string;
-    msContentZoomFactor: number;
-    readonly msRegionOverflow: string;
-    onariarequest: (this: this, ev: AriaRequestEvent) => any;
-    oncommand: (this: this, ev: CommandEvent) => any;
-    ongotpointercapture: (this: this, ev: PointerEvent) => any;
-    onlostpointercapture: (this: this, ev: PointerEvent) => any;
-    onmsgesturechange: (this: this, ev: MSGestureEvent) => any;
-    onmsgesturedoubletap: (this: this, ev: MSGestureEvent) => any;
-    onmsgestureend: (this: this, ev: MSGestureEvent) => any;
-    onmsgesturehold: (this: this, ev: MSGestureEvent) => any;
-    onmsgesturestart: (this: this, ev: MSGestureEvent) => any;
-    onmsgesturetap: (this: this, ev: MSGestureEvent) => any;
-    onmsgotpointercapture: (this: this, ev: MSPointerEvent) => any;
-    onmsinertiastart: (this: this, ev: MSGestureEvent) => any;
-    onmslostpointercapture: (this: this, ev: MSPointerEvent) => any;
-    onmspointercancel: (this: this, ev: MSPointerEvent) => any;
-    onmspointerdown: (this: this, ev: MSPointerEvent) => any;
-    onmspointerenter: (this: this, ev: MSPointerEvent) => any;
-    onmspointerleave: (this: this, ev: MSPointerEvent) => any;
-    onmspointermove: (this: this, ev: MSPointerEvent) => any;
-    onmspointerout: (this: this, ev: MSPointerEvent) => any;
-    onmspointerover: (this: this, ev: MSPointerEvent) => any;
-    onmspointerup: (this: this, ev: MSPointerEvent) => any;
-    ontouchcancel: (ev: TouchEvent) => any;
-    ontouchend: (ev: TouchEvent) => any;
-    ontouchmove: (ev: TouchEvent) => any;
-    ontouchstart: (ev: TouchEvent) => any;
-    onwebkitfullscreenchange: (this: this, ev: Event) => any;
-    onwebkitfullscreenerror: (this: this, ev: Event) => any;
-    readonly prefix: string | null;
-    readonly scrollHeight: number;
-    scrollLeft: number;
-    scrollTop: number;
-    readonly scrollWidth: number;
-    readonly tagName: string;
-    innerHTML: string;
-    getAttribute(name: string): string | null;
-    getAttributeNS(namespaceURI: string, localName: string): string;
-    getAttributeNode(name: string): Attr;
-    getAttributeNodeNS(namespaceURI: string, localName: string): Attr;
-    getBoundingClientRect(): ClientRect;
-    getClientRects(): ClientRectList;
-    getElementsByTagName(name: "a"): NodeListOf<HTMLAnchorElement>;
-    getElementsByTagName(name: "abbr"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "acronym"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "address"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "applet"): NodeListOf<HTMLAppletElement>;
-    getElementsByTagName(name: "area"): NodeListOf<HTMLAreaElement>;
-    getElementsByTagName(name: "article"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "aside"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "audio"): NodeListOf<HTMLAudioElement>;
-    getElementsByTagName(name: "b"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "base"): NodeListOf<HTMLBaseElement>;
-    getElementsByTagName(name: "basefont"): NodeListOf<HTMLBaseFontElement>;
-    getElementsByTagName(name: "bdo"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "big"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "blockquote"): NodeListOf<HTMLQuoteElement>;
-    getElementsByTagName(name: "body"): NodeListOf<HTMLBodyElement>;
-    getElementsByTagName(name: "br"): NodeListOf<HTMLBRElement>;
-    getElementsByTagName(name: "button"): NodeListOf<HTMLButtonElement>;
-    getElementsByTagName(name: "canvas"): NodeListOf<HTMLCanvasElement>;
-    getElementsByTagName(name: "caption"): NodeListOf<HTMLTableCaptionElement>;
-    getElementsByTagName(name: "center"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "circle"): NodeListOf<SVGCircleElement>;
-    getElementsByTagName(name: "cite"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "clippath"): NodeListOf<SVGClipPathElement>;
-    getElementsByTagName(name: "code"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "col"): NodeListOf<HTMLTableColElement>;
-    getElementsByTagName(name: "colgroup"): NodeListOf<HTMLTableColElement>;
-    getElementsByTagName(name: "datalist"): NodeListOf<HTMLDataListElement>;
-    getElementsByTagName(name: "dd"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "defs"): NodeListOf<SVGDefsElement>;
-    getElementsByTagName(name: "del"): NodeListOf<HTMLModElement>;
-    getElementsByTagName(name: "desc"): NodeListOf<SVGDescElement>;
-    getElementsByTagName(name: "dfn"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "dir"): NodeListOf<HTMLDirectoryElement>;
-    getElementsByTagName(name: "div"): NodeListOf<HTMLDivElement>;
-    getElementsByTagName(name: "dl"): NodeListOf<HTMLDListElement>;
-    getElementsByTagName(name: "dt"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "ellipse"): NodeListOf<SVGEllipseElement>;
-    getElementsByTagName(name: "em"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "embed"): NodeListOf<HTMLEmbedElement>;
-    getElementsByTagName(name: "feblend"): NodeListOf<SVGFEBlendElement>;
-    getElementsByTagName(name: "fecolormatrix"): NodeListOf<SVGFEColorMatrixElement>;
-    getElementsByTagName(name: "fecomponenttransfer"): NodeListOf<SVGFEComponentTransferElement>;
-    getElementsByTagName(name: "fecomposite"): NodeListOf<SVGFECompositeElement>;
-    getElementsByTagName(name: "feconvolvematrix"): NodeListOf<SVGFEConvolveMatrixElement>;
-    getElementsByTagName(name: "fediffuselighting"): NodeListOf<SVGFEDiffuseLightingElement>;
-    getElementsByTagName(name: "fedisplacementmap"): NodeListOf<SVGFEDisplacementMapElement>;
-    getElementsByTagName(name: "fedistantlight"): NodeListOf<SVGFEDistantLightElement>;
-    getElementsByTagName(name: "feflood"): NodeListOf<SVGFEFloodElement>;
-    getElementsByTagName(name: "fefunca"): NodeListOf<SVGFEFuncAElement>;
-    getElementsByTagName(name: "fefuncb"): NodeListOf<SVGFEFuncBElement>;
-    getElementsByTagName(name: "fefuncg"): NodeListOf<SVGFEFuncGElement>;
-    getElementsByTagName(name: "fefuncr"): NodeListOf<SVGFEFuncRElement>;
-    getElementsByTagName(name: "fegaussianblur"): NodeListOf<SVGFEGaussianBlurElement>;
-    getElementsByTagName(name: "feimage"): NodeListOf<SVGFEImageElement>;
-    getElementsByTagName(name: "femerge"): NodeListOf<SVGFEMergeElement>;
-    getElementsByTagName(name: "femergenode"): NodeListOf<SVGFEMergeNodeElement>;
-    getElementsByTagName(name: "femorphology"): NodeListOf<SVGFEMorphologyElement>;
-    getElementsByTagName(name: "feoffset"): NodeListOf<SVGFEOffsetElement>;
-    getElementsByTagName(name: "fepointlight"): NodeListOf<SVGFEPointLightElement>;
-    getElementsByTagName(name: "fespecularlighting"): NodeListOf<SVGFESpecularLightingElement>;
-    getElementsByTagName(name: "fespotlight"): NodeListOf<SVGFESpotLightElement>;
-    getElementsByTagName(name: "fetile"): NodeListOf<SVGFETileElement>;
-    getElementsByTagName(name: "feturbulence"): NodeListOf<SVGFETurbulenceElement>;
-    getElementsByTagName(name: "fieldset"): NodeListOf<HTMLFieldSetElement>;
-    getElementsByTagName(name: "figcaption"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "figure"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "filter"): NodeListOf<SVGFilterElement>;
-    getElementsByTagName(name: "font"): NodeListOf<HTMLFontElement>;
-    getElementsByTagName(name: "footer"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "foreignobject"): NodeListOf<SVGForeignObjectElement>;
-    getElementsByTagName(name: "form"): NodeListOf<HTMLFormElement>;
-    getElementsByTagName(name: "frame"): NodeListOf<HTMLFrameElement>;
-    getElementsByTagName(name: "frameset"): NodeListOf<HTMLFrameSetElement>;
-    getElementsByTagName(name: "g"): NodeListOf<SVGGElement>;
-    getElementsByTagName(name: "h1"): NodeListOf<HTMLHeadingElement>;
-    getElementsByTagName(name: "h2"): NodeListOf<HTMLHeadingElement>;
-    getElementsByTagName(name: "h3"): NodeListOf<HTMLHeadingElement>;
-    getElementsByTagName(name: "h4"): NodeListOf<HTMLHeadingElement>;
-    getElementsByTagName(name: "h5"): NodeListOf<HTMLHeadingElement>;
-    getElementsByTagName(name: "h6"): NodeListOf<HTMLHeadingElement>;
-    getElementsByTagName(name: "head"): NodeListOf<HTMLHeadElement>;
-    getElementsByTagName(name: "header"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "hgroup"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "hr"): NodeListOf<HTMLHRElement>;
-    getElementsByTagName(name: "html"): NodeListOf<HTMLHtmlElement>;
-    getElementsByTagName(name: "i"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "iframe"): NodeListOf<HTMLIFrameElement>;
-    getElementsByTagName(name: "image"): NodeListOf<SVGImageElement>;
-    getElementsByTagName(name: "img"): NodeListOf<HTMLImageElement>;
-    getElementsByTagName(name: "input"): NodeListOf<HTMLInputElement>;
-    getElementsByTagName(name: "ins"): NodeListOf<HTMLModElement>;
-    getElementsByTagName(name: "isindex"): NodeListOf<HTMLUnknownElement>;
-    getElementsByTagName(name: "kbd"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "keygen"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "label"): NodeListOf<HTMLLabelElement>;
-    getElementsByTagName(name: "legend"): NodeListOf<HTMLLegendElement>;
-    getElementsByTagName(name: "li"): NodeListOf<HTMLLIElement>;
-    getElementsByTagName(name: "line"): NodeListOf<SVGLineElement>;
-    getElementsByTagName(name: "lineargradient"): NodeListOf<SVGLinearGradientElement>;
-    getElementsByTagName(name: "link"): NodeListOf<HTMLLinkElement>;
-    getElementsByTagName(name: "listing"): NodeListOf<HTMLPreElement>;
-    getElementsByTagName(name: "map"): NodeListOf<HTMLMapElement>;
-    getElementsByTagName(name: "mark"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "marker"): NodeListOf<SVGMarkerElement>;
-    getElementsByTagName(name: "marquee"): NodeListOf<HTMLMarqueeElement>;
-    getElementsByTagName(name: "mask"): NodeListOf<SVGMaskElement>;
-    getElementsByTagName(name: "menu"): NodeListOf<HTMLMenuElement>;
-    getElementsByTagName(name: "meta"): NodeListOf<HTMLMetaElement>;
-    getElementsByTagName(name: "metadata"): NodeListOf<SVGMetadataElement>;
-    getElementsByTagName(name: "meter"): NodeListOf<HTMLMeterElement>;
-    getElementsByTagName(name: "nav"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "nextid"): NodeListOf<HTMLUnknownElement>;
-    getElementsByTagName(name: "nobr"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "noframes"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "noscript"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "object"): NodeListOf<HTMLObjectElement>;
-    getElementsByTagName(name: "ol"): NodeListOf<HTMLOListElement>;
-    getElementsByTagName(name: "optgroup"): NodeListOf<HTMLOptGroupElement>;
-    getElementsByTagName(name: "option"): NodeListOf<HTMLOptionElement>;
-    getElementsByTagName(name: "p"): NodeListOf<HTMLParagraphElement>;
-    getElementsByTagName(name: "param"): NodeListOf<HTMLParamElement>;
-    getElementsByTagName(name: "path"): NodeListOf<SVGPathElement>;
-    getElementsByTagName(name: "pattern"): NodeListOf<SVGPatternElement>;
-    getElementsByTagName(name: "picture"): NodeListOf<HTMLPictureElement>;
-    getElementsByTagName(name: "plaintext"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "polygon"): NodeListOf<SVGPolygonElement>;
-    getElementsByTagName(name: "polyline"): NodeListOf<SVGPolylineElement>;
-    getElementsByTagName(name: "pre"): NodeListOf<HTMLPreElement>;
-    getElementsByTagName(name: "progress"): NodeListOf<HTMLProgressElement>;
-    getElementsByTagName(name: "q"): NodeListOf<HTMLQuoteElement>;
-    getElementsByTagName(name: "radialgradient"): NodeListOf<SVGRadialGradientElement>;
-    getElementsByTagName(name: "rect"): NodeListOf<SVGRectElement>;
-    getElementsByTagName(name: "rt"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "ruby"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "s"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "samp"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "script"): NodeListOf<HTMLScriptElement>;
-    getElementsByTagName(name: "section"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "select"): NodeListOf<HTMLSelectElement>;
-    getElementsByTagName(name: "small"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "source"): NodeListOf<HTMLSourceElement>;
-    getElementsByTagName(name: "span"): NodeListOf<HTMLSpanElement>;
-    getElementsByTagName(name: "stop"): NodeListOf<SVGStopElement>;
-    getElementsByTagName(name: "strike"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "strong"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "style"): NodeListOf<HTMLStyleElement>;
-    getElementsByTagName(name: "sub"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "sup"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "svg"): NodeListOf<SVGSVGElement>;
-    getElementsByTagName(name: "switch"): NodeListOf<SVGSwitchElement>;
-    getElementsByTagName(name: "symbol"): NodeListOf<SVGSymbolElement>;
-    getElementsByTagName(name: "table"): NodeListOf<HTMLTableElement>;
-    getElementsByTagName(name: "tbody"): NodeListOf<HTMLTableSectionElement>;
-    getElementsByTagName(name: "td"): NodeListOf<HTMLTableDataCellElement>;
-    getElementsByTagName(name: "template"): NodeListOf<HTMLTemplateElement>;
-    getElementsByTagName(name: "text"): NodeListOf<SVGTextElement>;
-    getElementsByTagName(name: "textpath"): NodeListOf<SVGTextPathElement>;
-    getElementsByTagName(name: "textarea"): NodeListOf<HTMLTextAreaElement>;
-    getElementsByTagName(name: "tfoot"): NodeListOf<HTMLTableSectionElement>;
-    getElementsByTagName(name: "th"): NodeListOf<HTMLTableHeaderCellElement>;
-    getElementsByTagName(name: "thead"): NodeListOf<HTMLTableSectionElement>;
-    getElementsByTagName(name: "title"): NodeListOf<HTMLTitleElement>;
-    getElementsByTagName(name: "tr"): NodeListOf<HTMLTableRowElement>;
-    getElementsByTagName(name: "track"): NodeListOf<HTMLTrackElement>;
-    getElementsByTagName(name: "tspan"): NodeListOf<SVGTSpanElement>;
-    getElementsByTagName(name: "tt"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "u"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "ul"): NodeListOf<HTMLUListElement>;
-    getElementsByTagName(name: "use"): NodeListOf<SVGUseElement>;
-    getElementsByTagName(name: "var"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "video"): NodeListOf<HTMLVideoElement>;
-    getElementsByTagName(name: "view"): NodeListOf<SVGViewElement>;
-    getElementsByTagName(name: "wbr"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "x-ms-webview"): NodeListOf<MSHTMLWebViewElement>;
-    getElementsByTagName(name: "xmp"): NodeListOf<HTMLPreElement>;
-    getElementsByTagName(name: string): NodeListOf<Element>;
-    getElementsByTagNameNS(namespaceURI: "http://www.w3.org/1999/xhtml", localName: string): HTMLCollectionOf<HTMLElement>;
-    getElementsByTagNameNS(namespaceURI: "http://www.w3.org/2000/svg", localName: string): HTMLCollectionOf<SVGElement>;
-    getElementsByTagNameNS(namespaceURI: string, localName: string): HTMLCollectionOf<Element>;
-    hasAttribute(name: string): boolean;
-    hasAttributeNS(namespaceURI: string, localName: string): boolean;
-    msGetRegionContent(): MSRangeCollection;
-    msGetUntransformedBounds(): ClientRect;
-    msMatchesSelector(selectors: string): boolean;
-    msReleasePointerCapture(pointerId: number): void;
-    msSetPointerCapture(pointerId: number): void;
-    msZoomTo(args: MsZoomToOptions): void;
-    releasePointerCapture(pointerId: number): void;
-    removeAttribute(name?: string): void;
-    removeAttributeNS(namespaceURI: string, localName: string): void;
-    removeAttributeNode(oldAttr: Attr): Attr;
-    requestFullscreen(): void;
-    requestPointerLock(): void;
-    setAttribute(name: string, value: string): void;
-    setAttributeNS(namespaceURI: string, qualifiedName: string, value: string): void;
-    setAttributeNode(newAttr: Attr): Attr;
-    setAttributeNodeNS(newAttr: Attr): Attr;
-    setPointerCapture(pointerId: number): void;
-    webkitMatchesSelector(selectors: string): boolean;
-    webkitRequestFullScreen(): void;
-    webkitRequestFullscreen(): void;
-    getElementsByClassName(classNames: string): NodeListOf<Element>;
-    matches(selector: string): boolean;
-    closest(selector: string): Element | null;
-    scrollIntoView(arg?: boolean | ScrollIntoViewOptions): void;
-    scroll(options?: ScrollToOptions): void;
-    scroll(x: number, y: number): void;
-    scrollTo(options?: ScrollToOptions): void;
-    scrollTo(x: number, y: number): void;
-    scrollBy(options?: ScrollToOptions): void;
-    scrollBy(x: number, y: number): void;
-    insertAdjacentElement(position: string, insertedElement: Element): Element | null;
-    insertAdjacentHTML(where: string, html: string): void;
-    insertAdjacentText(where: string, text: string): void;
-    addEventListener(type: "MSGestureChange", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureDoubleTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureEnd", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureHold", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGotPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSInertiaStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSLostPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerCancel", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerDown", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerEnter", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerLeave", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerMove", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOut", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOver", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerUp", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ariarequest", listener: (this: this, ev: AriaRequestEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "command", listener: (this: this, ev: CommandEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "gotpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "lostpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointercancel", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerdown", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerenter", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerleave", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointermove", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerout", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerover", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerup", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchcancel", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchend", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchmove", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchstart", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenerror", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "wheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var Element: {
-    prototype: Element;
-    new(): Element;
-}
-
-interface ErrorEvent extends Event {
-    readonly colno: number;
-    readonly error: any;
-    readonly filename: string;
-    readonly lineno: number;
-    readonly message: string;
-    initErrorEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, messageArg: string, filenameArg: string, linenoArg: number): void;
-}
-
-declare var ErrorEvent: {
-    prototype: ErrorEvent;
-    new(): ErrorEvent;
-}
-
-interface Event {
-    readonly bubbles: boolean;
-    cancelBubble: boolean;
-    readonly cancelable: boolean;
-    readonly currentTarget: EventTarget;
-    readonly defaultPrevented: boolean;
-    readonly eventPhase: number;
-    readonly isTrusted: boolean;
-    returnValue: boolean;
-    readonly srcElement: Element | null;
-    readonly target: EventTarget;
-    readonly timeStamp: number;
-    readonly type: string;
-    initEvent(eventTypeArg: string, canBubbleArg: boolean, cancelableArg: boolean): void;
-    preventDefault(): void;
-    stopImmediatePropagation(): void;
-    stopPropagation(): void;
-    readonly AT_TARGET: number;
-    readonly BUBBLING_PHASE: number;
-    readonly CAPTURING_PHASE: number;
-}
-
-declare var Event: {
-    prototype: Event;
-    new(type: string, eventInitDict?: EventInit): Event;
-    readonly AT_TARGET: number;
-    readonly BUBBLING_PHASE: number;
-    readonly CAPTURING_PHASE: number;
-}
-
-interface EventTarget {
-    addEventListener(type: string, listener?: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-    dispatchEvent(evt: Event): boolean;
-    removeEventListener(type: string, listener?: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var EventTarget: {
-    prototype: EventTarget;
-    new(): EventTarget;
-}
-
-interface External {
-}
-
-declare var External: {
-    prototype: External;
-    new(): External;
-}
-
-interface File extends Blob {
-    readonly lastModifiedDate: any;
-    readonly name: string;
-    readonly webkitRelativePath: string;
-}
-
-declare var File: {
-    prototype: File;
-    new (parts: (ArrayBuffer | ArrayBufferView | Blob | string)[], filename: string, properties?: FilePropertyBag): File;
-}
-
-interface FileList {
-    readonly length: number;
-    item(index: number): File;
-    [index: number]: File;
-}
-
-declare var FileList: {
-    prototype: FileList;
-    new(): FileList;
-}
-
-interface FileReader extends EventTarget, MSBaseReader {
-    readonly error: DOMError;
-    readAsArrayBuffer(blob: Blob): void;
-    readAsBinaryString(blob: Blob): void;
-    readAsDataURL(blob: Blob): void;
-    readAsText(blob: Blob, encoding?: string): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var FileReader: {
-    prototype: FileReader;
-    new(): FileReader;
-}
-
-interface FocusEvent extends UIEvent {
-    readonly relatedTarget: EventTarget;
-    initFocusEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, relatedTargetArg: EventTarget): void;
-}
-
-declare var FocusEvent: {
-    prototype: FocusEvent;
-    new(typeArg: string, eventInitDict?: FocusEventInit): FocusEvent;
-}
-
-interface FormData {
-    append(name: any, value: any, blobName?: string): void;
-}
-
-declare var FormData: {
-    prototype: FormData;
-    new (form?: HTMLFormElement): FormData;
-}
-
-interface GainNode extends AudioNode {
-    readonly gain: AudioParam;
-}
-
-declare var GainNode: {
-    prototype: GainNode;
-    new(): GainNode;
-}
-
-interface Gamepad {
-    readonly axes: number[];
-    readonly buttons: GamepadButton[];
-    readonly connected: boolean;
-    readonly id: string;
-    readonly index: number;
-    readonly mapping: string;
-    readonly timestamp: number;
-}
-
-declare var Gamepad: {
-    prototype: Gamepad;
-    new(): Gamepad;
-}
-
-interface GamepadButton {
-    readonly pressed: boolean;
-    readonly value: number;
-}
-
-declare var GamepadButton: {
-    prototype: GamepadButton;
-    new(): GamepadButton;
-}
-
-interface GamepadEvent extends Event {
-    readonly gamepad: Gamepad;
-}
-
-declare var GamepadEvent: {
-    prototype: GamepadEvent;
-    new(): GamepadEvent;
-}
-
-interface Geolocation {
-    clearWatch(watchId: number): void;
-    getCurrentPosition(successCallback: PositionCallback, errorCallback?: PositionErrorCallback, options?: PositionOptions): void;
-    watchPosition(successCallback: PositionCallback, errorCallback?: PositionErrorCallback, options?: PositionOptions): number;
-}
-
-declare var Geolocation: {
-    prototype: Geolocation;
-    new(): Geolocation;
-}
-
-interface HTMLAllCollection extends HTMLCollection {
-    namedItem(name: string): Element;
-}
-
-declare var HTMLAllCollection: {
-    prototype: HTMLAllCollection;
-    new(): HTMLAllCollection;
-}
-
-interface HTMLAnchorElement extends HTMLElement {
-    Methods: string;
-    /**
-      * Sets or retrieves the character set used to encode the object.
-      */
-    charset: string;
-    /**
-      * Sets or retrieves the coordinates of the object.
-      */
-    coords: string;
-    download: string;
-    /**
-      * Contains the anchor portion of the URL including the hash sign (#).
-      */
-    hash: string;
-    /**
-      * Contains the hostname and port values of the URL.
-      */
-    host: string;
-    /**
-      * Contains the hostname of a URL.
-      */
-    hostname: string;
-    /**
-      * Sets or retrieves a destination URL or an anchor point.
-      */
-    href: string;
-    /**
-      * Sets or retrieves the language code of the object.
-      */
-    hreflang: string;
-    readonly mimeType: string;
-    /**
-      * Sets or retrieves the shape of the object.
-      */
-    name: string;
-    readonly nameProp: string;
-    /**
-      * Contains the pathname of the URL.
-      */
-    pathname: string;
-    /**
-      * Sets or retrieves the port number associated with a URL.
-      */
-    port: string;
-    /**
-      * Contains the protocol of the URL.
-      */
-    protocol: string;
-    readonly protocolLong: string;
-    /**
-      * Sets or retrieves the relationship between the object and the destination of the link.
-      */
-    rel: string;
-    /**
-      * Sets or retrieves the relationship between the object and the destination of the link.
-      */
-    rev: string;
-    /**
-      * Sets or retrieves the substring of the href property that follows the question mark.
-      */
-    search: string;
-    /**
-      * Sets or retrieves the shape of the object.
-      */
-    shape: string;
-    /**
-      * Sets or retrieves the window or frame at which to target content.
-      */
-    target: string;
-    /**
-      * Retrieves or sets the text of the object as a string. 
-      */
-    text: string;
-    type: string;
-    urn: string;
-    /** 
-      * Returns a string representation of an object.
-      */
-    toString(): string;
-}
-
-declare var HTMLAnchorElement: {
-    prototype: HTMLAnchorElement;
-    new(): HTMLAnchorElement;
-}
-
-interface HTMLAppletElement extends HTMLElement {
-    /**
-      * Retrieves a string of the URL where the object tag can be found. This is often the href of the document that the object is in, or the value set by a base element.
-      */
-    readonly BaseHref: string;
-    align: string;
-    /**
-      * Sets or retrieves a text alternative to the graphic.
-      */
-    alt: string;
-    /**
-      * Gets or sets the optional alternative HTML script to execute if the object fails to load.
-      */
-    altHtml: string;
-    /**
-      * Sets or retrieves a character string that can be used to implement your own archive functionality for the object.
-      */
-    archive: string;
-    border: string;
-    code: string;
-    /**
-      * Sets or retrieves the URL of the component.
-      */
-    codeBase: string;
-    /**
-      * Sets or retrieves the Internet media type for the code associated with the object.
-      */
-    codeType: string;
-    /**
-      * Address of a pointer to the document this page or frame contains. If there is no document, then null will be returned.
-      */
-    readonly contentDocument: Document;
-    /**
-      * Sets or retrieves the URL that references the data of the object.
-      */
-    data: string;
-    /**
-      * Sets or retrieves a character string that can be used to implement your own declare functionality for the object.
-      */
-    declare: boolean;
-    readonly form: HTMLFormElement;
-    /**
-      * Sets or retrieves the height of the object.
-      */
-    height: string;
-    hspace: number;
-    /**
-      * Sets or retrieves the shape of the object.
-      */
-    name: string;
-    object: string | null;
-    /**
-      * Sets or retrieves a message to be displayed while an object is loading.
-      */
-    standby: string;
-    /**
-      * Returns the content type of the object.
-      */
-    type: string;
-    /**
-      * Sets or retrieves the URL, often with a bookmark extension (#name), to use as a client-side image map.
-      */
-    useMap: string;
-    vspace: number;
-    width: number;
-}
-
-declare var HTMLAppletElement: {
-    prototype: HTMLAppletElement;
-    new(): HTMLAppletElement;
-}
-
-interface HTMLAreaElement extends HTMLElement {
-    /**
-      * Sets or retrieves a text alternative to the graphic.
-      */
-    alt: string;
-    /**
-      * Sets or retrieves the coordinates of the object.
-      */
-    coords: string;
-    download: string;
-    /**
-      * Sets or retrieves the subsection of the href property that follows the number sign (#).
-      */
-    hash: string;
-    /**
-      * Sets or retrieves the hostname and port number of the location or URL.
-      */
-    host: string;
-    /**
-      * Sets or retrieves the host name part of the location or URL. 
-      */
-    hostname: string;
-    /**
-      * Sets or retrieves a destination URL or an anchor point.
-      */
-    href: string;
-    /**
-      * Sets or gets whether clicks in this region cause action.
-      */
-    noHref: boolean;
-    /**
-      * Sets or retrieves the file name or path specified by the object.
-      */
-    pathname: string;
-    /**
-      * Sets or retrieves the port number associated with a URL.
-      */
-    port: string;
-    /**
-      * Sets or retrieves the protocol portion of a URL.
-      */
-    protocol: string;
-    rel: string;
-    /**
-      * Sets or retrieves the substring of the href property that follows the question mark.
-      */
-    search: string;
-    /**
-      * Sets or retrieves the shape of the object.
-      */
-    shape: string;
-    /**
-      * Sets or retrieves the window or frame at which to target content.
-      */
-    target: string;
-    /** 
-      * Returns a string representation of an object.
-      */
-    toString(): string;
-}
-
-declare var HTMLAreaElement: {
-    prototype: HTMLAreaElement;
-    new(): HTMLAreaElement;
-}
-
-interface HTMLAreasCollection extends HTMLCollection {
-    /**
-      * Adds an element to the areas, controlRange, or options collection.
-      */
-    add(element: HTMLElement, before?: HTMLElement | number): void;
-    /**
-      * Removes an element from the collection.
-      */
-    remove(index?: number): void;
-}
-
-declare var HTMLAreasCollection: {
-    prototype: HTMLAreasCollection;
-    new(): HTMLAreasCollection;
-}
-
-interface HTMLAudioElement extends HTMLMediaElement {
-}
-
-declare var HTMLAudioElement: {
-    prototype: HTMLAudioElement;
-    new(): HTMLAudioElement;
-}
-
-interface HTMLBRElement extends HTMLElement {
-    /**
-      * Sets or retrieves the side on which floating objects are not to be positioned when any IHTMLBlockElement is inserted into the document.
-      */
-    clear: string;
-}
-
-declare var HTMLBRElement: {
-    prototype: HTMLBRElement;
-    new(): HTMLBRElement;
-}
-
-interface HTMLBaseElement extends HTMLElement {
-    /**
-      * Gets or sets the baseline URL on which relative links are based.
-      */
-    href: string;
-    /**
-      * Sets or retrieves the window or frame at which to target content.
-      */
-    target: string;
-}
-
-declare var HTMLBaseElement: {
-    prototype: HTMLBaseElement;
-    new(): HTMLBaseElement;
-}
-
-interface HTMLBaseFontElement extends HTMLElement, DOML2DeprecatedColorProperty {
-    /**
-      * Sets or retrieves the current typeface family.
-      */
-    face: string;
-    /**
-      * Sets or retrieves the font size of the object.
-      */
-    size: number;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLBaseFontElement: {
-    prototype: HTMLBaseFontElement;
-    new(): HTMLBaseFontElement;
-}
-
-interface HTMLBodyElement extends HTMLElement {
-    aLink: any;
-    background: string;
-    bgColor: any;
-    bgProperties: string;
-    link: any;
-    noWrap: boolean;
-    onafterprint: (this: this, ev: Event) => any;
-    onbeforeprint: (this: this, ev: Event) => any;
-    onbeforeunload: (this: this, ev: BeforeUnloadEvent) => any;
-    onblur: (this: this, ev: FocusEvent) => any;
-    onerror: (this: this, ev: ErrorEvent) => any;
-    onfocus: (this: this, ev: FocusEvent) => any;
-    onhashchange: (this: this, ev: HashChangeEvent) => any;
-    onload: (this: this, ev: Event) => any;
-    onmessage: (this: this, ev: MessageEvent) => any;
-    onoffline: (this: this, ev: Event) => any;
-    ononline: (this: this, ev: Event) => any;
-    onorientationchange: (this: this, ev: Event) => any;
-    onpagehide: (this: this, ev: PageTransitionEvent) => any;
-    onpageshow: (this: this, ev: PageTransitionEvent) => any;
-    onpopstate: (this: this, ev: PopStateEvent) => any;
-    onresize: (this: this, ev: UIEvent) => any;
-    onstorage: (this: this, ev: StorageEvent) => any;
-    onunload: (this: this, ev: Event) => any;
-    text: any;
-    vLink: any;
-    addEventListener(type: "MSContentZoom", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureChange", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureDoubleTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureEnd", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureHold", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGotPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSInertiaStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSLostPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSManipulationStateChanged", listener: (this: this, ev: MSManipulationEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerCancel", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerDown", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerEnter", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerLeave", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerMove", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOut", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOver", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerUp", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "abort", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "activate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "afterprint", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "ariarequest", listener: (this: this, ev: AriaRequestEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforecopy", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforecut", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforedeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforepaste", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforeprint", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforeunload", listener: (this: this, ev: BeforeUnloadEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "blur", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "blur", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplay", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplaythrough", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "change", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "click", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "command", listener: (this: this, ev: CommandEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "contextmenu", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "copy", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "cuechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "cut", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dblclick", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "deactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drag", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragend", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragenter", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragleave", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragover", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragstart", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drop", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "durationchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "emptied", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "ended", listener: (this: this, ev: MediaStreamErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "focus", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "focus", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "gotpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "hashchange", listener: (this: this, ev: HashChangeEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "input", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "invalid", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "keydown", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keypress", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keyup", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadeddata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadedmetadata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "lostpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "message", listener: (this: this, ev: MessageEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousedown", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseenter", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseleave", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousemove", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseout", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseover", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseup", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousewheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "offline", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "online", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "orientationchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "pagehide", listener: (this: this, ev: PageTransitionEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pageshow", listener: (this: this, ev: PageTransitionEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "paste", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pause", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "play", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "playing", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointercancel", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerdown", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerenter", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerleave", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointermove", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerout", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerover", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerup", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "popstate", listener: (this: this, ev: PopStateEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "progress", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ratechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "reset", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "resize", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "scroll", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeked", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeking", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "select", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "selectstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "stalled", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "storage", listener: (this: this, ev: StorageEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "submit", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "suspend", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "timeupdate", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchcancel", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchend", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchmove", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchstart", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "unload", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "volumechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "waiting", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenerror", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "wheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLBodyElement: {
-    prototype: HTMLBodyElement;
-    new(): HTMLBodyElement;
-}
-
-interface HTMLButtonElement extends HTMLElement {
-    /**
-      * Provides a way to direct a user to a specific field when a document loads. This can provide both direction and convenience for a user, reducing the need to click or tab to a field when a page opens. This attribute is true when present on an element, and false when missing.
-      */
-    autofocus: boolean;
-    disabled: boolean;
-    /**
-      * Retrieves a reference to the form that the object is embedded in.
-      */
-    readonly form: HTMLFormElement;
-    /**
-      * Overrides the action attribute (where the data on a form is sent) on the parent form element.
-      */
-    formAction: string;
-    /**
-      * Used to override the encoding (formEnctype attribute) specified on the form element.
-      */
-    formEnctype: string;
-    /**
-      * Overrides the submit method attribute previously specified on a form element.
-      */
-    formMethod: string;
-    /**
-      * Overrides any validation or required attributes on a form or form elements to allow it to be submitted without validation. This can be used to create a "save draft"-type submit option.
-      */
-    formNoValidate: string;
-    /**
-      * Overrides the target attribute on a form element.
-      */
-    formTarget: string;
-    /** 
-      * Sets or retrieves the name of the object.
-      */
-    name: string;
-    status: any;
-    /**
-      * Gets the classification and default behavior of the button.
-      */
-    type: string;
-    /**
-      * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
-      */
-    readonly validationMessage: string;
-    /**
-      * Returns a  ValidityState object that represents the validity states of an element.
-      */
-    readonly validity: ValidityState;
-    /** 
-      * Sets or retrieves the default or selected value of the control.
-      */
-    value: string;
-    /**
-      * Returns whether an element will successfully validate based on forms validation rules and constraints.
-      */
-    readonly willValidate: boolean;
-    /**
-      * Returns whether a form will validate when it is submitted, without having to submit it.
-      */
-    checkValidity(): boolean;
-    /**
-      * Sets a custom error message that is displayed when a form is submitted.
-      * @param error Sets a custom error message that is displayed when a form is submitted.
-      */
-    setCustomValidity(error: string): void;
-}
-
-declare var HTMLButtonElement: {
-    prototype: HTMLButtonElement;
-    new(): HTMLButtonElement;
-}
-
-interface HTMLCanvasElement extends HTMLElement {
-    /**
-      * Gets or sets the height of a canvas element on a document.
-      */
-    height: number;
-    /**
-      * Gets or sets the width of a canvas element on a document.
-      */
-    width: number;
-    /**
-      * Returns an object that provides methods and properties for drawing and manipulating images and graphics on a canvas element in a document. A context object includes information about colors, line widths, fonts, and other graphic parameters that can be drawn on a canvas.
-      * @param contextId The identifier (ID) of the type of canvas to create. Internet Explorer 9 and Internet Explorer 10 support only a 2-D context using canvas.getContext("2d"); IE11 Preview also supports 3-D or WebGL context using canvas.getContext("experimental-webgl");
-      */
-    getContext(contextId: "2d", contextAttributes?: Canvas2DContextAttributes): CanvasRenderingContext2D | null;
-    getContext(contextId: "webgl" | "experimental-webgl", contextAttributes?: WebGLContextAttributes): WebGLRenderingContext | null;
-    getContext(contextId: string, contextAttributes?: {}): CanvasRenderingContext2D | WebGLRenderingContext | null;
-    /**
-      * Returns a blob object encoded as a Portable Network Graphics (PNG) format from a canvas image or drawing.
-      */
-    msToBlob(): Blob;
-    /**
-      * Returns the content of the current canvas as an image that you can use as a source for another canvas or an HTML element.
-      * @param type The standard MIME type for the image format to return. If you do not specify this parameter, the default value is a PNG format image.
-      */
-    toDataURL(type?: string, ...args: any[]): string;
-    toBlob(callback: (result: Blob | null) => void, type?: string, ...arguments: any[]): void;
-}
-
-declare var HTMLCanvasElement: {
-    prototype: HTMLCanvasElement;
-    new(): HTMLCanvasElement;
-}
-
-interface HTMLCollection {
-    /**
-      * Sets or retrieves the number of objects in a collection.
-      */
-    readonly length: number;
-    /**
-      * Retrieves an object from various collections.
-      */
-    item(index: number): Element;
-    /**
-      * Retrieves a select object or an object from an options collection.
-      */
-    namedItem(name: string): Element;
-    [index: number]: Element;
-}
-
-declare var HTMLCollection: {
-    prototype: HTMLCollection;
-    new(): HTMLCollection;
-}
-
-interface HTMLDListElement extends HTMLElement {
-    compact: boolean;
-}
-
-declare var HTMLDListElement: {
-    prototype: HTMLDListElement;
-    new(): HTMLDListElement;
-}
-
-interface HTMLDataListElement extends HTMLElement {
-    options: HTMLCollectionOf<HTMLOptionElement>;
-}
-
-declare var HTMLDataListElement: {
-    prototype: HTMLDataListElement;
-    new(): HTMLDataListElement;
-}
-
-interface HTMLDirectoryElement extends HTMLElement {
-    compact: boolean;
-}
-
-declare var HTMLDirectoryElement: {
-    prototype: HTMLDirectoryElement;
-    new(): HTMLDirectoryElement;
-}
-
-interface HTMLDivElement extends HTMLElement {
-    /**
-      * Sets or retrieves how the object is aligned with adjacent text. 
-      */
-    align: string;
-    /**
-      * Sets or retrieves whether the browser automatically performs wordwrap.
-      */
-    noWrap: boolean;
-}
-
-declare var HTMLDivElement: {
-    prototype: HTMLDivElement;
-    new(): HTMLDivElement;
-}
-
-interface HTMLDocument extends Document {
-}
-
-declare var HTMLDocument: {
-    prototype: HTMLDocument;
-    new(): HTMLDocument;
-}
-
-interface HTMLElement extends Element {
-    accessKey: string;
-    readonly children: HTMLCollection;
-    contentEditable: string;
-    readonly dataset: DOMStringMap;
-    dir: string;
-    draggable: boolean;
-    hidden: boolean;
-    hideFocus: boolean;
-    innerHTML: string;
-    innerText: string;
-    readonly isContentEditable: boolean;
-    lang: string;
-    readonly offsetHeight: number;
-    readonly offsetLeft: number;
-    readonly offsetParent: Element;
-    readonly offsetTop: number;
-    readonly offsetWidth: number;
-    onabort: (this: this, ev: UIEvent) => any;
-    onactivate: (this: this, ev: UIEvent) => any;
-    onbeforeactivate: (this: this, ev: UIEvent) => any;
-    onbeforecopy: (this: this, ev: ClipboardEvent) => any;
-    onbeforecut: (this: this, ev: ClipboardEvent) => any;
-    onbeforedeactivate: (this: this, ev: UIEvent) => any;
-    onbeforepaste: (this: this, ev: ClipboardEvent) => any;
-    onblur: (this: this, ev: FocusEvent) => any;
-    oncanplay: (this: this, ev: Event) => any;
-    oncanplaythrough: (this: this, ev: Event) => any;
-    onchange: (this: this, ev: Event) => any;
-    onclick: (this: this, ev: MouseEvent) => any;
-    oncontextmenu: (this: this, ev: PointerEvent) => any;
-    oncopy: (this: this, ev: ClipboardEvent) => any;
-    oncuechange: (this: this, ev: Event) => any;
-    oncut: (this: this, ev: ClipboardEvent) => any;
-    ondblclick: (this: this, ev: MouseEvent) => any;
-    ondeactivate: (this: this, ev: UIEvent) => any;
-    ondrag: (this: this, ev: DragEvent) => any;
-    ondragend: (this: this, ev: DragEvent) => any;
-    ondragenter: (this: this, ev: DragEvent) => any;
-    ondragleave: (this: this, ev: DragEvent) => any;
-    ondragover: (this: this, ev: DragEvent) => any;
-    ondragstart: (this: this, ev: DragEvent) => any;
-    ondrop: (this: this, ev: DragEvent) => any;
-    ondurationchange: (this: this, ev: Event) => any;
-    onemptied: (this: this, ev: Event) => any;
-    onended: (this: this, ev: MediaStreamErrorEvent) => any;
-    onerror: (this: this, ev: ErrorEvent) => any;
-    onfocus: (this: this, ev: FocusEvent) => any;
-    oninput: (this: this, ev: Event) => any;
-    oninvalid: (this: this, ev: Event) => any;
-    onkeydown: (this: this, ev: KeyboardEvent) => any;
-    onkeypress: (this: this, ev: KeyboardEvent) => any;
-    onkeyup: (this: this, ev: KeyboardEvent) => any;
-    onload: (this: this, ev: Event) => any;
-    onloadeddata: (this: this, ev: Event) => any;
-    onloadedmetadata: (this: this, ev: Event) => any;
-    onloadstart: (this: this, ev: Event) => any;
-    onmousedown: (this: this, ev: MouseEvent) => any;
-    onmouseenter: (this: this, ev: MouseEvent) => any;
-    onmouseleave: (this: this, ev: MouseEvent) => any;
-    onmousemove: (this: this, ev: MouseEvent) => any;
-    onmouseout: (this: this, ev: MouseEvent) => any;
-    onmouseover: (this: this, ev: MouseEvent) => any;
-    onmouseup: (this: this, ev: MouseEvent) => any;
-    onmousewheel: (this: this, ev: WheelEvent) => any;
-    onmscontentzoom: (this: this, ev: UIEvent) => any;
-    onmsmanipulationstatechanged: (this: this, ev: MSManipulationEvent) => any;
-    onpaste: (this: this, ev: ClipboardEvent) => any;
-    onpause: (this: this, ev: Event) => any;
-    onplay: (this: this, ev: Event) => any;
-    onplaying: (this: this, ev: Event) => any;
-    onprogress: (this: this, ev: ProgressEvent) => any;
-    onratechange: (this: this, ev: Event) => any;
-    onreset: (this: this, ev: Event) => any;
-    onscroll: (this: this, ev: UIEvent) => any;
-    onseeked: (this: this, ev: Event) => any;
-    onseeking: (this: this, ev: Event) => any;
-    onselect: (this: this, ev: UIEvent) => any;
-    onselectstart: (this: this, ev: Event) => any;
-    onstalled: (this: this, ev: Event) => any;
-    onsubmit: (this: this, ev: Event) => any;
-    onsuspend: (this: this, ev: Event) => any;
-    ontimeupdate: (this: this, ev: Event) => any;
-    onvolumechange: (this: this, ev: Event) => any;
-    onwaiting: (this: this, ev: Event) => any;
-    outerHTML: string;
-    outerText: string;
-    spellcheck: boolean;
-    readonly style: CSSStyleDeclaration;
-    tabIndex: number;
-    title: string;
-    blur(): void;
-    click(): void;
-    dragDrop(): boolean;
-    focus(): void;
-    msGetInputContext(): MSInputMethodContext;
-    setActive(): void;
-    addEventListener(type: "MSContentZoom", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureChange", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureDoubleTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureEnd", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureHold", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGotPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSInertiaStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSLostPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSManipulationStateChanged", listener: (this: this, ev: MSManipulationEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerCancel", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerDown", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerEnter", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerLeave", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerMove", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOut", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOver", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerUp", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "abort", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "activate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ariarequest", listener: (this: this, ev: AriaRequestEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforecopy", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforecut", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforedeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforepaste", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "blur", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplay", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplaythrough", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "change", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "click", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "command", listener: (this: this, ev: CommandEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "contextmenu", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "copy", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "cuechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "cut", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dblclick", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "deactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drag", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragend", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragenter", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragleave", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragover", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragstart", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drop", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "durationchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "emptied", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "ended", listener: (this: this, ev: MediaStreamErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "focus", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "gotpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "input", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "invalid", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "keydown", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keypress", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keyup", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadeddata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadedmetadata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "lostpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousedown", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseenter", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseleave", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousemove", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseout", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseover", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseup", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousewheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "paste", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pause", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "play", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "playing", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointercancel", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerdown", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerenter", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerleave", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointermove", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerout", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerover", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerup", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "progress", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ratechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "reset", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "scroll", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeked", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeking", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "select", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "selectstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "stalled", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "submit", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "suspend", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "timeupdate", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchcancel", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchend", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchmove", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchstart", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "volumechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "waiting", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenerror", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "wheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLElement: {
-    prototype: HTMLElement;
-    new(): HTMLElement;
-}
-
-interface HTMLEmbedElement extends HTMLElement, GetSVGDocument {
-    /**
-      * Sets or retrieves the height of the object.
-      */
-    height: string;
-    hidden: any;
-    /**
-      * Gets or sets whether the DLNA PlayTo device is available.
-      */
-    msPlayToDisabled: boolean;
-    /**
-      * Gets or sets the path to the preferred media source. This enables the Play To target device to stream the media content, which can be DRM protected, from a different location, such as a cloud media server.
-      */
-    msPlayToPreferredSourceUri: string;
-    /**
-      * Gets or sets the primary DLNA PlayTo device.
-      */
-    msPlayToPrimary: boolean;
-    /**
-      * Gets the source associated with the media element for use by the PlayToManager.
-      */
-    readonly msPlayToSource: any;
-    /**
-      * Sets or retrieves the name of the object.
-      */
-    name: string;
-    /**
-      * Retrieves the palette used for the embedded document.
-      */
-    readonly palette: string;
-    /**
-      * Retrieves the URL of the plug-in used to view an embedded document.
-      */
-    readonly pluginspage: string;
-    readonly readyState: string;
-    /**
-      * Sets or retrieves a URL to be loaded by the object.
-      */
-    src: string;
-    /**
-      * Sets or retrieves the height and width units of the embed object.
-      */
-    units: string;
-    /**
-      * Sets or retrieves the width of the object.
-      */
-    width: string;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLEmbedElement: {
-    prototype: HTMLEmbedElement;
-    new(): HTMLEmbedElement;
-}
-
-interface HTMLFieldSetElement extends HTMLElement {
-    /**
-      * Sets or retrieves how the object is aligned with adjacent text.
-      */
-    align: string;
-    disabled: boolean;
-    /**
-      * Retrieves a reference to the form that the object is embedded in.
-      */
-    readonly form: HTMLFormElement;
-    /**
-      * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
-      */
-    readonly validationMessage: string;
-    /**
-      * Returns a  ValidityState object that represents the validity states of an element.
-      */
-    readonly validity: ValidityState;
-    /**
-      * Returns whether an element will successfully validate based on forms validation rules and constraints.
-      */
-    readonly willValidate: boolean;
-    /**
-      * Returns whether a form will validate when it is submitted, without having to submit it.
-      */
-    checkValidity(): boolean;
-    /**
-      * Sets a custom error message that is displayed when a form is submitted.
-      * @param error Sets a custom error message that is displayed when a form is submitted.
-      */
-    setCustomValidity(error: string): void;
-}
-
-declare var HTMLFieldSetElement: {
-    prototype: HTMLFieldSetElement;
-    new(): HTMLFieldSetElement;
-}
-
-interface HTMLFontElement extends HTMLElement, DOML2DeprecatedColorProperty, DOML2DeprecatedSizeProperty {
-    /**
-      * Sets or retrieves the current typeface family.
-      */
-    face: string;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLFontElement: {
-    prototype: HTMLFontElement;
-    new(): HTMLFontElement;
-}
-
-interface HTMLFormElement extends HTMLElement {
-    /**
-      * Sets or retrieves a list of character encodings for input data that must be accepted by the server processing the form.
-      */
-    acceptCharset: string;
-    /**
-      * Sets or retrieves the URL to which the form content is sent for processing.
-      */
-    action: string;
-    /**
-      * Specifies whether autocomplete is applied to an editable text field.
-      */
-    autocomplete: string;
-    /**
-      * Retrieves a collection, in source order, of all controls in a given form.
-      */
-    readonly elements: HTMLCollection;
-    /**
-      * Sets or retrieves the MIME encoding for the form.
-      */
-    encoding: string;
-    /**
-      * Sets or retrieves the encoding type for the form.
-      */
-    enctype: string;
-    /**
-      * Sets or retrieves the number of objects in a collection.
-      */
-    readonly length: number;
-    /**
-      * Sets or retrieves how to send the form data to the server.
-      */
-    method: string;
-    /**
-      * Sets or retrieves the name of the object.
-      */
-    name: string;
-    /**
-      * Designates a form that is not validated when submitted.
-      */
-    noValidate: boolean;
-    /**
-      * Sets or retrieves the window or frame at which to target content.
-      */
-    target: string;
-    /**
-      * Returns whether a form will validate when it is submitted, without having to submit it.
-      */
-    checkValidity(): boolean;
-    /**
-      * Retrieves a form object or an object from an elements collection.
-      * @param name Variant of type Number or String that specifies the object or collection to retrieve. If this parameter is a Number, it is the zero-based index of the object. If this parameter is a string, all objects with matching name or id properties are retrieved, and a collection is returned if more than one match is made.
-      * @param index Variant of type Number that specifies the zero-based index of the object to retrieve when a collection is returned.
-      */
-    item(name?: any, index?: any): any;
-    /**
-      * Retrieves a form object or an object from an elements collection.
-      */
-    namedItem(name: string): any;
-    /**
-      * Fires when the user resets a form.
-      */
-    reset(): void;
-    /**
-      * Fires when a FORM is about to be submitted.
-      */
-    submit(): void;
-    [name: string]: any;
-}
-
-declare var HTMLFormElement: {
-    prototype: HTMLFormElement;
-    new(): HTMLFormElement;
-}
-
-interface HTMLFrameElement extends HTMLElement, GetSVGDocument {
-    /**
-      * Specifies the properties of a border drawn around an object.
-      */
-    border: string;
-    /**
-      * Sets or retrieves the border color of the object.
-      */
-    borderColor: any;
-    /**
-      * Retrieves the document object of the page or frame.
-      */
-    readonly contentDocument: Document;
-    /**
-      * Retrieves the object of the specified.
-      */
-    readonly contentWindow: Window;
-    /**
-      * Sets or retrieves whether to display a border for the frame.
-      */
-    frameBorder: string;
-    /**
-      * Sets or retrieves the amount of additional space between the frames.
-      */
-    frameSpacing: any;
-    /**
-      * Sets or retrieves the height of the object.
-      */
-    height: string | number;
-    /**
-      * Sets or retrieves a URI to a long description of the object.
-      */
-    longDesc: string;
-    /**
-      * Sets or retrieves the top and bottom margin heights before displaying the text in a frame.
-      */
-    marginHeight: string;
-    /**
-      * Sets or retrieves the left and right margin widths before displaying the text in a frame.
-      */
-    marginWidth: string;
-    /**
-      * Sets or retrieves the frame name.
-      */
-    name: string;
-    /**
-      * Sets or retrieves whether the user can resize the frame.
-      */
-    noResize: boolean;
-    /**
-      * Raised when the object has been completely received from the server.
-      */
-    onload: (this: this, ev: Event) => any;
-    /**
-      * Sets or retrieves whether the frame can be scrolled.
-      */
-    scrolling: string;
-    /**
-      * Sets or retrieves a URL to be loaded by the object.
-      */
-    src: string;
-    /**
-      * Sets or retrieves the width of the object.
-      */
-    width: string | number;
-    addEventListener(type: "MSContentZoom", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureChange", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureDoubleTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureEnd", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureHold", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGotPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSInertiaStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSLostPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSManipulationStateChanged", listener: (this: this, ev: MSManipulationEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerCancel", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerDown", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerEnter", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerLeave", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerMove", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOut", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOver", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerUp", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "abort", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "activate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ariarequest", listener: (this: this, ev: AriaRequestEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforecopy", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforecut", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforedeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforepaste", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "blur", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplay", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplaythrough", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "change", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "click", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "command", listener: (this: this, ev: CommandEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "contextmenu", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "copy", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "cuechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "cut", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dblclick", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "deactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drag", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragend", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragenter", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragleave", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragover", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragstart", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drop", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "durationchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "emptied", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "ended", listener: (this: this, ev: MediaStreamErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "focus", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "gotpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "input", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "invalid", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "keydown", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keypress", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keyup", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadeddata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadedmetadata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "lostpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousedown", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseenter", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseleave", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousemove", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseout", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseover", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseup", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousewheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "paste", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pause", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "play", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "playing", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointercancel", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerdown", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerenter", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerleave", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointermove", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerout", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerover", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerup", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "progress", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ratechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "reset", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "scroll", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeked", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeking", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "select", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "selectstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "stalled", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "submit", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "suspend", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "timeupdate", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchcancel", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchend", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchmove", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchstart", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "volumechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "waiting", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenerror", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "wheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLFrameElement: {
-    prototype: HTMLFrameElement;
-    new(): HTMLFrameElement;
-}
-
-interface HTMLFrameSetElement extends HTMLElement {
-    border: string;
-    /**
-      * Sets or retrieves the border color of the object.
-      */
-    borderColor: any;
-    /**
-      * Sets or retrieves the frame widths of the object.
-      */
-    cols: string;
-    /**
-      * Sets or retrieves whether to display a border for the frame.
-      */
-    frameBorder: string;
-    /**
-      * Sets or retrieves the amount of additional space between the frames.
-      */
-    frameSpacing: any;
-    name: string;
-    onafterprint: (this: this, ev: Event) => any;
-    onbeforeprint: (this: this, ev: Event) => any;
-    onbeforeunload: (this: this, ev: BeforeUnloadEvent) => any;
-    /**
-      * Fires when the object loses the input focus.
-      */
-    onblur: (this: this, ev: FocusEvent) => any;
-    onerror: (this: this, ev: ErrorEvent) => any;
-    /**
-      * Fires when the object receives focus.
-      */
-    onfocus: (this: this, ev: FocusEvent) => any;
-    onhashchange: (this: this, ev: HashChangeEvent) => any;
-    onload: (this: this, ev: Event) => any;
-    onmessage: (this: this, ev: MessageEvent) => any;
-    onoffline: (this: this, ev: Event) => any;
-    ononline: (this: this, ev: Event) => any;
-    onorientationchange: (this: this, ev: Event) => any;
-    onpagehide: (this: this, ev: PageTransitionEvent) => any;
-    onpageshow: (this: this, ev: PageTransitionEvent) => any;
-    onresize: (this: this, ev: UIEvent) => any;
-    onstorage: (this: this, ev: StorageEvent) => any;
-    onunload: (this: this, ev: Event) => any;
-    /**
-      * Sets or retrieves the frame heights of the object.
-      */
-    rows: string;
-    addEventListener(type: "MSContentZoom", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureChange", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureDoubleTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureEnd", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureHold", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGotPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSInertiaStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSLostPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSManipulationStateChanged", listener: (this: this, ev: MSManipulationEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerCancel", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerDown", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerEnter", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerLeave", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerMove", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOut", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOver", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerUp", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "abort", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "activate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ariarequest", listener: (this: this, ev: AriaRequestEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforecopy", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforecut", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforedeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforepaste", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforeprint", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforeunload", listener: (this: this, ev: BeforeUnloadEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "blur", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "blur", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplay", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplaythrough", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "change", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "click", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "command", listener: (this: this, ev: CommandEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "contextmenu", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "copy", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "cuechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "cut", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dblclick", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "deactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drag", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragend", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragenter", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragleave", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragover", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragstart", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drop", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "durationchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "emptied", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "ended", listener: (this: this, ev: MediaStreamErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "focus", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "focus", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "gotpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "hashchange", listener: (this: this, ev: HashChangeEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "input", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "invalid", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "keydown", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keypress", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keyup", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadeddata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadedmetadata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "lostpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "message", listener: (this: this, ev: MessageEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousedown", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseenter", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseleave", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousemove", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseout", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseover", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseup", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousewheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "offline", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "online", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "orientationchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "pagehide", listener: (this: this, ev: PageTransitionEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pageshow", listener: (this: this, ev: PageTransitionEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "paste", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pause", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "play", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "playing", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointercancel", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerdown", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerenter", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerleave", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointermove", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerout", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerover", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerup", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "progress", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ratechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "reset", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "resize", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "scroll", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeked", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeking", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "select", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "selectstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "stalled", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "storage", listener: (this: this, ev: StorageEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "submit", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "suspend", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "timeupdate", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchcancel", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchend", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchmove", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchstart", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "unload", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "volumechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "waiting", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenerror", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "wheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLFrameSetElement: {
-    prototype: HTMLFrameSetElement;
-    new(): HTMLFrameSetElement;
-}
-
-interface HTMLHRElement extends HTMLElement, DOML2DeprecatedColorProperty, DOML2DeprecatedSizeProperty {
-    /**
-      * Sets or retrieves how the object is aligned with adjacent text.
-      */
-    align: string;
-    /**
-      * Sets or retrieves whether the horizontal rule is drawn with 3-D shading.
-      */
-    noShade: boolean;
-    /**
-      * Sets or retrieves the width of the object.
-      */
-    width: number;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLHRElement: {
-    prototype: HTMLHRElement;
-    new(): HTMLHRElement;
-}
-
-interface HTMLHeadElement extends HTMLElement {
-    profile: string;
-}
-
-declare var HTMLHeadElement: {
-    prototype: HTMLHeadElement;
-    new(): HTMLHeadElement;
-}
-
-interface HTMLHeadingElement extends HTMLElement {
-    /**
-      * Sets or retrieves a value that indicates the table alignment.
-      */
-    align: string;
-}
-
-declare var HTMLHeadingElement: {
-    prototype: HTMLHeadingElement;
-    new(): HTMLHeadingElement;
-}
-
-interface HTMLHtmlElement extends HTMLElement {
-    /**
-      * Sets or retrieves the DTD version that governs the current document.
-      */
-    version: string;
-}
-
-declare var HTMLHtmlElement: {
-    prototype: HTMLHtmlElement;
-    new(): HTMLHtmlElement;
-}
-
-interface HTMLIFrameElement extends HTMLElement, GetSVGDocument {
-    /**
-      * Sets or retrieves how the object is aligned with adjacent text.
-      */
-    align: string;
-    allowFullscreen: boolean;
-    /**
-      * Specifies the properties of a border drawn around an object.
-      */
-    border: string;
-    /**
-      * Retrieves the document object of the page or frame.
-      */
-    readonly contentDocument: Document;
-    /**
-      * Retrieves the object of the specified.
-      */
-    readonly contentWindow: Window;
-    /**
-      * Sets or retrieves whether to display a border for the frame.
-      */
-    frameBorder: string;
-    /**
-      * Sets or retrieves the amount of additional space between the frames.
-      */
-    frameSpacing: any;
-    /**
-      * Sets or retrieves the height of the object.
-      */
-    height: string;
-    /**
-      * Sets or retrieves the horizontal margin for the object.
-      */
-    hspace: number;
-    /**
-      * Sets or retrieves a URI to a long description of the object.
-      */
-    longDesc: string;
-    /**
-      * Sets or retrieves the top and bottom margin heights before displaying the text in a frame.
-      */
-    marginHeight: string;
-    /**
-      * Sets or retrieves the left and right margin widths before displaying the text in a frame.
-      */
-    marginWidth: string;
-    /**
-      * Sets or retrieves the frame name.
-      */
-    name: string;
-    /**
-      * Sets or retrieves whether the user can resize the frame.
-      */
-    noResize: boolean;
-    /**
-      * Raised when the object has been completely received from the server.
-      */
-    onload: (this: this, ev: Event) => any;
-    readonly sandbox: DOMSettableTokenList;
-    /**
-      * Sets or retrieves whether the frame can be scrolled.
-      */
-    scrolling: string;
-    /**
-      * Sets or retrieves a URL to be loaded by the object.
-      */
-    src: string;
-    /**
-      * Sets or retrieves the vertical margin for the object.
-      */
-    vspace: number;
-    /**
-      * Sets or retrieves the width of the object.
-      */
-    width: string;
-    addEventListener(type: "MSContentZoom", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureChange", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureDoubleTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureEnd", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureHold", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGotPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSInertiaStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSLostPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSManipulationStateChanged", listener: (this: this, ev: MSManipulationEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerCancel", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerDown", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerEnter", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerLeave", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerMove", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOut", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOver", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerUp", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "abort", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "activate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ariarequest", listener: (this: this, ev: AriaRequestEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforecopy", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforecut", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforedeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforepaste", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "blur", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplay", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplaythrough", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "change", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "click", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "command", listener: (this: this, ev: CommandEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "contextmenu", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "copy", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "cuechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "cut", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dblclick", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "deactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drag", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragend", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragenter", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragleave", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragover", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragstart", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drop", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "durationchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "emptied", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "ended", listener: (this: this, ev: MediaStreamErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "focus", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "gotpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "input", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "invalid", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "keydown", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keypress", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keyup", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadeddata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadedmetadata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "lostpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousedown", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseenter", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseleave", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousemove", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseout", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseover", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseup", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousewheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "paste", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pause", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "play", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "playing", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointercancel", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerdown", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerenter", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerleave", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointermove", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerout", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerover", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerup", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "progress", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ratechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "reset", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "scroll", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeked", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeking", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "select", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "selectstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "stalled", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "submit", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "suspend", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "timeupdate", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchcancel", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchend", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchmove", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchstart", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "volumechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "waiting", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenerror", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "wheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLIFrameElement: {
-    prototype: HTMLIFrameElement;
-    new(): HTMLIFrameElement;
-}
-
-interface HTMLImageElement extends HTMLElement {
-    /**
-      * Sets or retrieves how the object is aligned with adjacent text.
-      */
-    align: string;
-    /**
-      * Sets or retrieves a text alternative to the graphic.
-      */
-    alt: string;
-    /**
-      * Specifies the properties of a border drawn around an object.
-      */
-    border: string;
-    /**
-      * Retrieves whether the object is fully loaded.
-      */
-    readonly complete: boolean;
-    crossOrigin: string;
-    readonly currentSrc: string;
-    /**
-      * Sets or retrieves the height of the object.
-      */
-    height: number;
-    /**
-      * Sets or retrieves the width of the border to draw around the object.
-      */
-    hspace: number;
-    /**
-      * Sets or retrieves whether the image is a server-side image map.
-      */
-    isMap: boolean;
-    /**
-      * Sets or retrieves a Uniform Resource Identifier (URI) to a long description of the object.
-      */
-    longDesc: string;
-    lowsrc: string;
-    /**
-      * Gets or sets whether the DLNA PlayTo device is available.
-      */
-    msPlayToDisabled: boolean;
-    msPlayToPreferredSourceUri: string;
-    /**
-      * Gets or sets the primary DLNA PlayTo device.
-      */
-    msPlayToPrimary: boolean;
-    /**
-      * Gets the source associated with the media element for use by the PlayToManager.
-      */
-    readonly msPlayToSource: any;
-    /**
-      * Sets or retrieves the name of the object.
-      */
-    name: string;
-    /**
-      * The original height of the image resource before sizing.
-      */
-    readonly naturalHeight: number;
-    /**
-      * The original width of the image resource before sizing.
-      */
-    readonly naturalWidth: number;
-    sizes: string;
-    /**
-      * The address or URL of the a media resource that is to be considered.
-      */
-    src: string;
-    srcset: string;
-    /**
-      * Sets or retrieves the URL, often with a bookmark extension (#name), to use as a client-side image map.
-      */
-    useMap: string;
-    /**
-      * Sets or retrieves the vertical margin for the object.
-      */
-    vspace: number;
-    /**
-      * Sets or retrieves the width of the object.
-      */
-    width: number;
-    readonly x: number;
-    readonly y: number;
-    msGetAsCastingSource(): any;
-}
-
-declare var HTMLImageElement: {
-    prototype: HTMLImageElement;
-    new(): HTMLImageElement;
-    create(): HTMLImageElement;
-}
-
-interface HTMLInputElement extends HTMLElement {
-    /**
-      * Sets or retrieves a comma-separated list of content types.
-      */
-    accept: string;
-    /**
-      * Sets or retrieves how the object is aligned with adjacent text.
-      */
-    align: string;
-    /**
-      * Sets or retrieves a text alternative to the graphic.
-      */
-    alt: string;
-    /**
-      * Specifies whether autocomplete is applied to an editable text field.
-      */
-    autocomplete: string;
-    /**
-      * Provides a way to direct a user to a specific field when a document loads. This can provide both direction and convenience for a user, reducing the need to click or tab to a field when a page opens. This attribute is true when present on an element, and false when missing.
-      */
-    autofocus: boolean;
-    /**
-      * Sets or retrieves the width of the border to draw around the object.
-      */
-    border: string;
-    /**
-      * Sets or retrieves the state of the check box or radio button.
-      */
-    checked: boolean;
-    /**
-      * Retrieves whether the object is fully loaded.
-      */
-    readonly complete: boolean;
-    /**
-      * Sets or retrieves the state of the check box or radio button.
-      */
-    defaultChecked: boolean;
-    /**
-      * Sets or retrieves the initial contents of the object.
-      */
-    defaultValue: string;
-    disabled: boolean;
-    /**
-      * Returns a FileList object on a file type input object.
-      */
-    readonly files: FileList | null;
-    /**
-      * Retrieves a reference to the form that the object is embedded in. 
-      */
-    readonly form: HTMLFormElement;
-    /**
-      * Overrides the action attribute (where the data on a form is sent) on the parent form element.
-      */
-    formAction: string;
-    /**
-      * Used to override the encoding (formEnctype attribute) specified on the form element.
-      */
-    formEnctype: string;
-    /**
-      * Overrides the submit method attribute previously specified on a form element.
-      */
-    formMethod: string;
-    /**
-      * Overrides any validation or required attributes on a form or form elements to allow it to be submitted without validation. This can be used to create a "save draft"-type submit option.
-      */
-    formNoValidate: string;
-    /**
-      * Overrides the target attribute on a form element.
-      */
-    formTarget: string;
-    /**
-      * Sets or retrieves the height of the object.
-      */
-    height: string;
-    /**
-      * Sets or retrieves the width of the border to draw around the object.
-      */
-    hspace: number;
-    indeterminate: boolean;
-    /**
-      * Specifies the ID of a pre-defined datalist of options for an input element.
-      */
-    readonly list: HTMLElement;
-    /**
-      * Defines the maximum acceptable value for an input element with type="number".When used with the min and step attributes, lets you control the range and increment (such as only even numbers) that the user can enter into an input field.
-      */
-    max: string;
-    /**
-      * Sets or retrieves the maximum number of characters that the user can enter in a text control.
-      */
-    maxLength: number;
-    /**
-      * Defines the minimum acceptable value for an input element with type="number". When used with the max and step attributes, lets you control the range and increment (such as even numbers only) that the user can enter into an input field.
-      */
-    min: string;
-    /**
-      * Sets or retrieves the Boolean value indicating whether multiple items can be selected from a list.
-      */
-    multiple: boolean;
-    /**
-      * Sets or retrieves the name of the object.
-      */
-    name: string;
-    /**
-      * Gets or sets a string containing a regular expression that the user's input must match.
-      */
-    pattern: string;
-    /**
-      * Gets or sets a text string that is displayed in an input field as a hint or prompt to users as the format or type of information they need to enter.The text appears in an input field until the user puts focus on the field.
-      */
-    placeholder: string;
-    readOnly: boolean;
-    /**
-      * When present, marks an element that can't be submitted without a value.
-      */
-    required: boolean;
-    selectionDirection: string;
-    /**
-      * Gets or sets the end position or offset of a text selection.
-      */
-    selectionEnd: number;
-    /**
-      * Gets or sets the starting position or offset of a text selection.
-      */
-    selectionStart: number;
-    size: number;
-    /**
-      * The address or URL of the a media resource that is to be considered.
-      */
-    src: string;
-    status: boolean;
-    /**
-      * Defines an increment or jump between values that you want to allow the user to enter. When used with the max and min attributes, lets you control the range and increment (for example, allow only even numbers) that the user can enter into an input field.
-      */
-    step: string;
-    /**
-      * Returns the content type of the object.
-      */
-    type: string;
-    /**
-      * Sets or retrieves the URL, often with a bookmark extension (#name), to use as a client-side image map.
-      */
-    useMap: string;
-    /**
-      * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
-      */
-    readonly validationMessage: string;
-    /**
-      * Returns a  ValidityState object that represents the validity states of an element.
-      */
-    readonly validity: ValidityState;
-    /**
-      * Returns the value of the data at the cursor's current position.
-      */
-    value: string;
-    valueAsDate: Date;
-    /**
-      * Returns the input field value as a number.
-      */
-    valueAsNumber: number;
-    /**
-      * Sets or retrieves the vertical margin for the object.
-      */
-    vspace: number;
-    webkitdirectory: boolean;
-    /**
-      * Sets or retrieves the width of the object.
-      */
-    width: string;
-    /**
-      * Returns whether an element will successfully validate based on forms validation rules and constraints.
-      */
-    readonly willValidate: boolean;
-    minLength: number;
-    /**
-      * Returns whether a form will validate when it is submitted, without having to submit it.
-      */
-    checkValidity(): boolean;
-    /**
-      * Makes the selection equal to the current object.
-      */
-    select(): void;
-    /**
-      * Sets a custom error message that is displayed when a form is submitted.
-      * @param error Sets a custom error message that is displayed when a form is submitted.
-      */
-    setCustomValidity(error: string): void;
-    /**
-      * Sets the start and end positions of a selection in a text field.
-      * @param start The offset into the text field for the start of the selection.
-      * @param end The offset into the text field for the end of the selection.
-      */
-    setSelectionRange(start?: number, end?: number, direction?: string): void;
-    /**
-      * Decrements a range input control's value by the value given by the Step attribute. If the optional parameter is used, it will decrement the input control's step value multiplied by the parameter's value.
-      * @param n Value to decrement the value by.
-      */
-    stepDown(n?: number): void;
-    /**
-      * Increments a range input control's value by the value given by the Step attribute. If the optional parameter is used, will increment the input control's value by that value.
-      * @param n Value to increment the value by.
-      */
-    stepUp(n?: number): void;
-}
-
-declare var HTMLInputElement: {
-    prototype: HTMLInputElement;
-    new(): HTMLInputElement;
-}
-
-interface HTMLLIElement extends HTMLElement {
-    type: string;
-    /**
-      * Sets or retrieves the value of a list item.
-      */
-    value: number;
-}
-
-declare var HTMLLIElement: {
-    prototype: HTMLLIElement;
-    new(): HTMLLIElement;
-}
-
-interface HTMLLabelElement extends HTMLElement {
-    /**
-      * Retrieves a reference to the form that the object is embedded in.
-      */
-    readonly form: HTMLFormElement;
-    /**
-      * Sets or retrieves the object to which the given label object is assigned.
-      */
-    htmlFor: string;
-}
-
-declare var HTMLLabelElement: {
-    prototype: HTMLLabelElement;
-    new(): HTMLLabelElement;
-}
-
-interface HTMLLegendElement extends HTMLElement {
-    /**
-      * Retrieves a reference to the form that the object is embedded in.
-      */
-    align: string;
-    /**
-      * Retrieves a reference to the form that the object is embedded in.
-      */
-    readonly form: HTMLFormElement;
-}
-
-declare var HTMLLegendElement: {
-    prototype: HTMLLegendElement;
-    new(): HTMLLegendElement;
-}
-
-interface HTMLLinkElement extends HTMLElement, LinkStyle {
-    /**
-      * Sets or retrieves the character set used to encode the object.
-      */
-    charset: string;
-    disabled: boolean;
-    /**
-      * Sets or retrieves a destination URL or an anchor point.
-      */
-    href: string;
-    /**
-      * Sets or retrieves the language code of the object.
-      */
-    hreflang: string;
-    /**
-      * Sets or retrieves the media type.
-      */
-    media: string;
-    /**
-      * Sets or retrieves the relationship between the object and the destination of the link.
-      */
-    rel: string;
-    /**
-      * Sets or retrieves the relationship between the object and the destination of the link.
-      */
-    rev: string;
-    /**
-      * Sets or retrieves the window or frame at which to target content.
-      */
-    target: string;
-    /**
-      * Sets or retrieves the MIME type of the object.
-      */
-    type: string;
-    import?: Document;
-    integrity: string;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLLinkElement: {
-    prototype: HTMLLinkElement;
-    new(): HTMLLinkElement;
-}
-
-interface HTMLMapElement extends HTMLElement {
-    /**
-      * Retrieves a collection of the area objects defined for the given map object.
-      */
-    readonly areas: HTMLAreasCollection;
-    /**
-      * Sets or retrieves the name of the object.
-      */
-    name: string;
-}
-
-declare var HTMLMapElement: {
-    prototype: HTMLMapElement;
-    new(): HTMLMapElement;
-}
-
-interface HTMLMarqueeElement extends HTMLElement {
-    behavior: string;
-    bgColor: any;
-    direction: string;
-    height: string;
-    hspace: number;
-    loop: number;
-    onbounce: (this: this, ev: Event) => any;
-    onfinish: (this: this, ev: Event) => any;
-    onstart: (this: this, ev: Event) => any;
-    scrollAmount: number;
-    scrollDelay: number;
-    trueSpeed: boolean;
-    vspace: number;
-    width: string;
-    start(): void;
-    stop(): void;
-    addEventListener(type: "MSContentZoom", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureChange", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureDoubleTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureEnd", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureHold", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGotPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSInertiaStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSLostPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSManipulationStateChanged", listener: (this: this, ev: MSManipulationEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerCancel", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerDown", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerEnter", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerLeave", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerMove", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOut", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOver", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerUp", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "abort", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "activate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ariarequest", listener: (this: this, ev: AriaRequestEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforecopy", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforecut", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforedeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforepaste", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "blur", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "bounce", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplay", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplaythrough", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "change", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "click", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "command", listener: (this: this, ev: CommandEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "contextmenu", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "copy", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "cuechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "cut", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dblclick", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "deactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drag", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragend", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragenter", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragleave", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragover", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragstart", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drop", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "durationchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "emptied", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "ended", listener: (this: this, ev: MediaStreamErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "finish", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "focus", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "gotpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "input", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "invalid", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "keydown", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keypress", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keyup", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadeddata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadedmetadata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "lostpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousedown", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseenter", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseleave", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousemove", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseout", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseover", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseup", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousewheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "paste", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pause", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "play", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "playing", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointercancel", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerdown", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerenter", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerleave", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointermove", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerout", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerover", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerup", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "progress", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ratechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "reset", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "scroll", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeked", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeking", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "select", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "selectstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "stalled", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "start", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "submit", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "suspend", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "timeupdate", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchcancel", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchend", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchmove", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchstart", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "volumechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "waiting", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenerror", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "wheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLMarqueeElement: {
-    prototype: HTMLMarqueeElement;
-    new(): HTMLMarqueeElement;
-}
-
-interface HTMLMediaElement extends HTMLElement {
-    /**
-      * Returns an AudioTrackList object with the audio tracks for a given video element.
-      */
-    readonly audioTracks: AudioTrackList;
-    /**
-      * Gets or sets a value that indicates whether to start playing the media automatically.
-      */
-    autoplay: boolean;
-    /**
-      * Gets a collection of buffered time ranges.
-      */
-    readonly buffered: TimeRanges;
-    /**
-      * Gets or sets a flag that indicates whether the client provides a set of controls for the media (in case the developer does not include controls for the player).
-      */
-    controls: boolean;
-    crossOrigin: string;
-    /**
-      * Gets the address or URL of the current media resource that is selected by IHTMLMediaElement.
-      */
-    readonly currentSrc: string;
-    /**
-      * Gets or sets the current playback position, in seconds.
-      */
-    currentTime: number;
-    defaultMuted: boolean;
-    /**
-      * Gets or sets the default playback rate when the user is not using fast forward or reverse for a video or audio resource.
-      */
-    defaultPlaybackRate: number;
-    /**
-      * Returns the duration in seconds of the current media resource. A NaN value is returned if duration is not available, or Infinity if the media resource is streaming.
-      */
-    readonly duration: number;
-    /**
-      * Gets information about whether the playback has ended or not.
-      */
-    readonly ended: boolean;
-    /**
-      * Returns an object representing the current error state of the audio or video element.
-      */
-    readonly error: MediaError;
-    /**
-      * Gets or sets a flag to specify whether playback should restart after it completes.
-      */
-    loop: boolean;
-    readonly mediaKeys: MediaKeys | null;
-    /**
-      * Specifies the purpose of the audio or video media, such as background audio or alerts.
-      */
-    msAudioCategory: string;
-    /**
-      * Specifies the output device id that the audio will be sent to.
-      */
-    msAudioDeviceType: string;
-    readonly msGraphicsTrustStatus: MSGraphicsTrust;
-    /**
-      * Gets the MSMediaKeys object, which is used for decrypting media data, that is associated with this media element.
-      */
-    readonly msKeys: MSMediaKeys;
-    /**
-      * Gets or sets whether the DLNA PlayTo device is available.
-      */
-    msPlayToDisabled: boolean;
-    /**
-      * Gets or sets the path to the preferred media source. This enables the Play To target device to stream the media content, which can be DRM protected, from a different location, such as a cloud media server.
-      */
-    msPlayToPreferredSourceUri: string;
-    /**
-      * Gets or sets the primary DLNA PlayTo device.
-      */
-    msPlayToPrimary: boolean;
-    /**
-      * Gets the source associated with the media element for use by the PlayToManager.
-      */
-    readonly msPlayToSource: any;
-    /**
-      * Specifies whether or not to enable low-latency playback on the media element.
-      */
-    msRealTime: boolean;
-    /**
-      * Gets or sets a flag that indicates whether the audio (either audio or the audio track on video media) is muted.
-      */
-    muted: boolean;
-    /**
-      * Gets the current network activity for the element.
-      */
-    readonly networkState: number;
-    onencrypted: (this: this, ev: MediaEncryptedEvent) => any;
-    onmsneedkey: (this: this, ev: MSMediaKeyNeededEvent) => any;
-    /**
-      * Gets a flag that specifies whether playback is paused.
-      */
-    readonly paused: boolean;
-    /**
-      * Gets or sets the current rate of speed for the media resource to play. This speed is expressed as a multiple of the normal speed of the media resource.
-      */
-    playbackRate: number;
-    /**
-      * Gets TimeRanges for the current media resource that has been played.
-      */
-    readonly played: TimeRanges;
-    /**
-      * Gets or sets the current playback position, in seconds.
-      */
-    preload: string;
-    readyState: number;
-    /**
-      * Returns a TimeRanges object that represents the ranges of the current media resource that can be seeked.
-      */
-    readonly seekable: TimeRanges;
-    /**
-      * Gets a flag that indicates whether the the client is currently moving to a new playback position in the media resource.
-      */
-    readonly seeking: boolean;
-    /**
-      * The address or URL of the a media resource that is to be considered.
-      */
-    src: string;
-    srcObject: MediaStream | null;
-    readonly textTracks: TextTrackList;
-    readonly videoTracks: VideoTrackList;
-    /**
-      * Gets or sets the volume level for audio portions of the media element.
-      */
-    volume: number;
-    addTextTrack(kind: string, label?: string, language?: string): TextTrack;
-    /**
-      * Returns a string that specifies whether the client can play a given media resource type.
-      */
-    canPlayType(type: string): string;
-    /**
-      * Resets the audio or video object and loads a new media resource.
-      */
-    load(): void;
-    /**
-      * Clears all effects from the media pipeline.
-      */
-    msClearEffects(): void;
-    msGetAsCastingSource(): any;
-    /**
-      * Inserts the specified audio effect into media pipeline.
-      */
-    msInsertAudioEffect(activatableClassId: string, effectRequired: boolean, config?: any): void;
-    msSetMediaKeys(mediaKeys: MSMediaKeys): void;
-    /**
-      * Specifies the media protection manager for a given media pipeline.
-      */
-    msSetMediaProtectionManager(mediaProtectionManager?: any): void;
-    /**
-      * Pauses the current playback and sets paused to TRUE. This can be used to test whether the media is playing or paused. You can also use the pause or play events to tell whether the media is playing or not.
-      */
-    pause(): void;
-    /**
-      * Loads and starts playback of a media resource.
-      */
-    play(): void;
-    setMediaKeys(mediaKeys: MediaKeys | null): PromiseLike<void>;
-    readonly HAVE_CURRENT_DATA: number;
-    readonly HAVE_ENOUGH_DATA: number;
-    readonly HAVE_FUTURE_DATA: number;
-    readonly HAVE_METADATA: number;
-    readonly HAVE_NOTHING: number;
-    readonly NETWORK_EMPTY: number;
-    readonly NETWORK_IDLE: number;
-    readonly NETWORK_LOADING: number;
-    readonly NETWORK_NO_SOURCE: number;
-    addEventListener(type: "MSContentZoom", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureChange", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureDoubleTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureEnd", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureHold", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGotPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSInertiaStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSLostPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSManipulationStateChanged", listener: (this: this, ev: MSManipulationEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerCancel", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerDown", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerEnter", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerLeave", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerMove", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOut", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOver", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerUp", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "abort", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "activate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ariarequest", listener: (this: this, ev: AriaRequestEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforecopy", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforecut", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforedeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforepaste", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "blur", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplay", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplaythrough", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "change", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "click", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "command", listener: (this: this, ev: CommandEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "contextmenu", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "copy", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "cuechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "cut", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dblclick", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "deactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drag", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragend", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragenter", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragleave", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragover", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragstart", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drop", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "durationchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "emptied", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "encrypted", listener: (this: this, ev: MediaEncryptedEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ended", listener: (this: this, ev: MediaStreamErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "focus", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "gotpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "input", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "invalid", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "keydown", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keypress", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keyup", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadeddata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadedmetadata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "lostpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousedown", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseenter", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseleave", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousemove", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseout", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseover", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseup", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousewheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "msneedkey", listener: (this: this, ev: MSMediaKeyNeededEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "paste", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pause", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "play", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "playing", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointercancel", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerdown", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerenter", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerleave", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointermove", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerout", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerover", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerup", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "progress", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ratechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "reset", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "scroll", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeked", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeking", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "select", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "selectstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "stalled", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "submit", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "suspend", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "timeupdate", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchcancel", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchend", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchmove", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchstart", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "volumechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "waiting", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenerror", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "wheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLMediaElement: {
-    prototype: HTMLMediaElement;
-    new(): HTMLMediaElement;
-    readonly HAVE_CURRENT_DATA: number;
-    readonly HAVE_ENOUGH_DATA: number;
-    readonly HAVE_FUTURE_DATA: number;
-    readonly HAVE_METADATA: number;
-    readonly HAVE_NOTHING: number;
-    readonly NETWORK_EMPTY: number;
-    readonly NETWORK_IDLE: number;
-    readonly NETWORK_LOADING: number;
-    readonly NETWORK_NO_SOURCE: number;
-}
-
-interface HTMLMenuElement extends HTMLElement {
-    compact: boolean;
-    type: string;
-}
-
-declare var HTMLMenuElement: {
-    prototype: HTMLMenuElement;
-    new(): HTMLMenuElement;
-}
-
-interface HTMLMetaElement extends HTMLElement {
-    /**
-      * Sets or retrieves the character set used to encode the object.
-      */
-    charset: string;
-    /**
-      * Gets or sets meta-information to associate with httpEquiv or name.
-      */
-    content: string;
-    /**
-      * Gets or sets information used to bind the value of a content attribute of a meta element to an HTTP response header.
-      */
-    httpEquiv: string;
-    /**
-      * Sets or retrieves the value specified in the content attribute of the meta object.
-      */
-    name: string;
-    /**
-      * Sets or retrieves a scheme to be used in interpreting the value of a property specified for the object.
-      */
-    scheme: string;
-    /**
-      * Sets or retrieves the URL property that will be loaded after the specified time has elapsed. 
-      */
-    url: string;
-}
-
-declare var HTMLMetaElement: {
-    prototype: HTMLMetaElement;
-    new(): HTMLMetaElement;
-}
-
-interface HTMLMeterElement extends HTMLElement {
-    high: number;
-    low: number;
-    max: number;
-    min: number;
-    optimum: number;
-    value: number;
-}
-
-declare var HTMLMeterElement: {
-    prototype: HTMLMeterElement;
-    new(): HTMLMeterElement;
-}
-
-interface HTMLModElement extends HTMLElement {
-    /**
-      * Sets or retrieves reference information about the object.
-      */
-    cite: string;
-    /**
-      * Sets or retrieves the date and time of a modification to the object.
-      */
-    dateTime: string;
-}
-
-declare var HTMLModElement: {
-    prototype: HTMLModElement;
-    new(): HTMLModElement;
-}
-
-interface HTMLOListElement extends HTMLElement {
-    compact: boolean;
-    /**
-      * The starting number.
-      */
-    start: number;
-    type: string;
-}
-
-declare var HTMLOListElement: {
-    prototype: HTMLOListElement;
-    new(): HTMLOListElement;
-}
-
-interface HTMLObjectElement extends HTMLElement, GetSVGDocument {
-    /**
-      * Retrieves a string of the URL where the object tag can be found. This is often the href of the document that the object is in, or the value set by a base element.
-      */
-    readonly BaseHref: string;
-    align: string;
-    /**
-      * Sets or retrieves a text alternative to the graphic.
-      */
-    alt: string;
-    /**
-      * Gets or sets the optional alternative HTML script to execute if the object fails to load.
-      */
-    altHtml: string;
-    /**
-      * Sets or retrieves a character string that can be used to implement your own archive functionality for the object.
-      */
-    archive: string;
-    border: string;
-    /**
-      * Sets or retrieves the URL of the file containing the compiled Java class.
-      */
-    code: string;
-    /**
-      * Sets or retrieves the URL of the component.
-      */
-    codeBase: string;
-    /**
-      * Sets or retrieves the Internet media type for the code associated with the object.
-      */
-    codeType: string;
-    /**
-      * Retrieves the document object of the page or frame.
-      */
-    readonly contentDocument: Document;
-    /**
-      * Sets or retrieves the URL that references the data of the object.
-      */
-    data: string;
-    declare: boolean;
-    /**
-      * Retrieves a reference to the form that the object is embedded in.
-      */
-    readonly form: HTMLFormElement;
-    /**
-      * Sets or retrieves the height of the object.
-      */
-    height: string;
-    hspace: number;
-    /**
-      * Gets or sets whether the DLNA PlayTo device is available.
-      */
-    msPlayToDisabled: boolean;
-    /**
-      * Gets or sets the path to the preferred media source. This enables the Play To target device to stream the media content, which can be DRM protected, from a different location, such as a cloud media server.
-      */
-    msPlayToPreferredSourceUri: string;
-    /**
-      * Gets or sets the primary DLNA PlayTo device.
-      */
-    msPlayToPrimary: boolean;
-    /**
-      * Gets the source associated with the media element for use by the PlayToManager.
-      */
-    readonly msPlayToSource: any;
-    /**
-      * Sets or retrieves the name of the object.
-      */
-    name: string;
-    /**
-      * Retrieves the contained object.
-      */
-    readonly object: any;
-    readonly readyState: number;
-    /**
-      * Sets or retrieves a message to be displayed while an object is loading.
-      */
-    standby: string;
-    /**
-      * Sets or retrieves the MIME type of the object.
-      */
-    type: string;
-    /**
-      * Sets or retrieves the URL, often with a bookmark extension (#name), to use as a client-side image map.
-      */
-    useMap: string;
-    /**
-      * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
-      */
-    readonly validationMessage: string;
-    /**
-      * Returns a  ValidityState object that represents the validity states of an element.
-      */
-    readonly validity: ValidityState;
-    vspace: number;
-    /**
-      * Sets or retrieves the width of the object.
-      */
-    width: string;
-    /**
-      * Returns whether an element will successfully validate based on forms validation rules and constraints.
-      */
-    readonly willValidate: boolean;
-    /**
-      * Returns whether a form will validate when it is submitted, without having to submit it.
-      */
-    checkValidity(): boolean;
-    /**
-      * Sets a custom error message that is displayed when a form is submitted.
-      * @param error Sets a custom error message that is displayed when a form is submitted.
-      */
-    setCustomValidity(error: string): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLObjectElement: {
-    prototype: HTMLObjectElement;
-    new(): HTMLObjectElement;
-}
-
-interface HTMLOptGroupElement extends HTMLElement {
-    /**
-      * Sets or retrieves the status of an option.
-      */
-    defaultSelected: boolean;
-    disabled: boolean;
-    /**
-      * Retrieves a reference to the form that the object is embedded in.
-      */
-    readonly form: HTMLFormElement;
-    /**
-      * Sets or retrieves the ordinal position of an option in a list box.
-      */
-    readonly index: number;
-    /**
-      * Sets or retrieves a value that you can use to implement your own label functionality for the object.
-      */
-    label: string;
-    /**
-      * Sets or retrieves whether the option in the list box is the default item.
-      */
-    selected: boolean;
-    /**
-      * Sets or retrieves the text string specified by the option tag.
-      */
-    readonly text: string;
-    /**
-      * Sets or retrieves the value which is returned to the server when the form control is submitted.
-      */
-    value: string;
-}
-
-declare var HTMLOptGroupElement: {
-    prototype: HTMLOptGroupElement;
-    new(): HTMLOptGroupElement;
-}
-
-interface HTMLOptionElement extends HTMLElement {
-    /**
-      * Sets or retrieves the status of an option.
-      */
-    defaultSelected: boolean;
-    disabled: boolean;
-    /**
-      * Retrieves a reference to the form that the object is embedded in.
-      */
-    readonly form: HTMLFormElement;
-    /**
-      * Sets or retrieves the ordinal position of an option in a list box.
-      */
-    readonly index: number;
-    /**
-      * Sets or retrieves a value that you can use to implement your own label functionality for the object.
-      */
-    label: string;
-    /**
-      * Sets or retrieves whether the option in the list box is the default item.
-      */
-    selected: boolean;
-    /**
-      * Sets or retrieves the text string specified by the option tag.
-      */
-    text: string;
-    /**
-      * Sets or retrieves the value which is returned to the server when the form control is submitted.
-      */
-    value: string;
-}
-
-declare var HTMLOptionElement: {
-    prototype: HTMLOptionElement;
-    new(): HTMLOptionElement;
-    create(): HTMLOptionElement;
-}
-
-interface HTMLOptionsCollection extends HTMLCollectionOf<HTMLOptionElement> {
-    length: number;
-    selectedIndex: number;
-    add(element: HTMLOptionElement | HTMLOptGroupElement, before?: HTMLElement | number): void;
-    remove(index: number): void;
-}
-
-declare var HTMLOptionsCollection: {
-    prototype: HTMLOptionsCollection;
-    new(): HTMLOptionsCollection;
-}
-
-interface HTMLParagraphElement extends HTMLElement {
-    /**
-      * Sets or retrieves how the object is aligned with adjacent text. 
-      */
-    align: string;
-    clear: string;
-}
-
-declare var HTMLParagraphElement: {
-    prototype: HTMLParagraphElement;
-    new(): HTMLParagraphElement;
-}
-
-interface HTMLParamElement extends HTMLElement {
-    /**
-      * Sets or retrieves the name of an input parameter for an element.
-      */
-    name: string;
-    /**
-      * Sets or retrieves the content type of the resource designated by the value attribute.
-      */
-    type: string;
-    /**
-      * Sets or retrieves the value of an input parameter for an element.
-      */
-    value: string;
-    /**
-      * Sets or retrieves the data type of the value attribute.
-      */
-    valueType: string;
-}
-
-declare var HTMLParamElement: {
-    prototype: HTMLParamElement;
-    new(): HTMLParamElement;
-}
-
-interface HTMLPictureElement extends HTMLElement {
-}
-
-declare var HTMLPictureElement: {
-    prototype: HTMLPictureElement;
-    new(): HTMLPictureElement;
-}
-
-interface HTMLPreElement extends HTMLElement {
-    /**
-      * Sets or gets a value that you can use to implement your own width functionality for the object.
-      */
-    width: number;
-}
-
-declare var HTMLPreElement: {
-    prototype: HTMLPreElement;
-    new(): HTMLPreElement;
-}
-
-interface HTMLProgressElement extends HTMLElement {
-    /**
-      * Retrieves a reference to the form that the object is embedded in.
-      */
-    readonly form: HTMLFormElement;
-    /**
-      * Defines the maximum, or "done" value for a progress element.
-      */
-    max: number;
-    /**
-      * Returns the quotient of value/max when the value attribute is set (determinate progress bar), or -1 when the value attribute is missing (indeterminate progress bar).
-      */
-    readonly position: number;
-    /**
-      * Sets or gets the current value of a progress element. The value must be a non-negative number between 0 and the max value.
-      */
-    value: number;
-}
-
-declare var HTMLProgressElement: {
-    prototype: HTMLProgressElement;
-    new(): HTMLProgressElement;
-}
-
-interface HTMLQuoteElement extends HTMLElement {
-    /**
-      * Sets or retrieves reference information about the object.
-      */
-    cite: string;
-}
-
-declare var HTMLQuoteElement: {
-    prototype: HTMLQuoteElement;
-    new(): HTMLQuoteElement;
-}
-
-interface HTMLScriptElement extends HTMLElement {
-    async: boolean;
-    /**
-      * Sets or retrieves the character set used to encode the object.
-      */
-    charset: string;
-    /**
-      * Sets or retrieves the status of the script.
-      */
-    defer: boolean;
-    /**
-      * Sets or retrieves the event for which the script is written. 
-      */
-    event: string;
-    /** 
-      * Sets or retrieves the object that is bound to the event script.
-      */
-    htmlFor: string;
-    /**
-      * Retrieves the URL to an external file that contains the source code or data.
-      */
-    src: string;
-    /**
-      * Retrieves or sets the text of the object as a string. 
-      */
-    text: string;
-    /**
-      * Sets or retrieves the MIME type for the associated scripting engine.
-      */
-    type: string;
-    integrity: string;
-}
-
-declare var HTMLScriptElement: {
-    prototype: HTMLScriptElement;
-    new(): HTMLScriptElement;
-}
-
-interface HTMLSelectElement extends HTMLElement {
-    /**
-      * Provides a way to direct a user to a specific field when a document loads. This can provide both direction and convenience for a user, reducing the need to click or tab to a field when a page opens. This attribute is true when present on an element, and false when missing.
-      */
-    autofocus: boolean;
-    disabled: boolean;
-    /**
-      * Retrieves a reference to the form that the object is embedded in. 
-      */
-    readonly form: HTMLFormElement;
-    /**
-      * Sets or retrieves the number of objects in a collection.
-      */
-    length: number;
-    /**
-      * Sets or retrieves the Boolean value indicating whether multiple items can be selected from a list.
-      */
-    multiple: boolean;
-    /**
-      * Sets or retrieves the name of the object.
-      */
-    name: string;
-    readonly options: HTMLOptionsCollection;
-    /**
-      * When present, marks an element that can't be submitted without a value.
-      */
-    required: boolean;
-    /**
-      * Sets or retrieves the index of the selected option in a select object.
-      */
-    selectedIndex: number;
-    selectedOptions: HTMLCollectionOf<HTMLOptionElement>;
-    /**
-      * Sets or retrieves the number of rows in the list box. 
-      */
-    size: number;
-    /**
-      * Retrieves the type of select control based on the value of the MULTIPLE attribute.
-      */
-    readonly type: string;
-    /**
-      * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
-      */
-    readonly validationMessage: string;
-    /**
-      * Returns a  ValidityState object that represents the validity states of an element.
-      */
-    readonly validity: ValidityState;
-    /**
-      * Sets or retrieves the value which is returned to the server when the form control is submitted.
-      */
-    value: string;
-    /**
-      * Returns whether an element will successfully validate based on forms validation rules and constraints.
-      */
-    readonly willValidate: boolean;
-    /**
-      * Adds an element to the areas, controlRange, or options collection.
-      * @param element Variant of type Number that specifies the index position in the collection where the element is placed. If no value is given, the method places the element at the end of the collection.
-      * @param before Variant of type Object that specifies an element to insert before, or null to append the object to the collection. 
-      */
-    add(element: HTMLElement, before?: HTMLElement | number): void;
-    /**
-      * Returns whether a form will validate when it is submitted, without having to submit it.
-      */
-    checkValidity(): boolean;
-    /**
-      * Retrieves a select object or an object from an options collection.
-      * @param name Variant of type Number or String that specifies the object or collection to retrieve. If this parameter is an integer, it is the zero-based index of the object. If this parameter is a string, all objects with matching name or id properties are retrieved, and a collection is returned if more than one match is made.
-      * @param index Variant of type Number that specifies the zero-based index of the object to retrieve when a collection is returned.
-      */
-    item(name?: any, index?: any): any;
-    /**
-      * Retrieves a select object or an object from an options collection.
-      * @param namedItem A String that specifies the name or id property of the object to retrieve. A collection is returned if more than one match is made.
-      */
-    namedItem(name: string): any;
-    /**
-      * Removes an element from the collection.
-      * @param index Number that specifies the zero-based index of the element to remove from the collection.
-      */
-    remove(index?: number): void;
-    /**
-      * Sets a custom error message that is displayed when a form is submitted.
-      * @param error Sets a custom error message that is displayed when a form is submitted.
-      */
-    setCustomValidity(error: string): void;
-    [name: string]: any;
-}
-
-declare var HTMLSelectElement: {
-    prototype: HTMLSelectElement;
-    new(): HTMLSelectElement;
-}
-
-interface HTMLSourceElement extends HTMLElement {
-    /**
-      * Gets or sets the intended media type of the media source.
-     */
-    media: string;
-    msKeySystem: string;
-    sizes: string;
-    /**
-      * The address or URL of the a media resource that is to be considered.
-      */
-    src: string;
-    srcset: string;
-    /**
-     * Gets or sets the MIME type of a media resource.
-     */
-    type: string;
-}
-
-declare var HTMLSourceElement: {
-    prototype: HTMLSourceElement;
-    new(): HTMLSourceElement;
-}
-
-interface HTMLSpanElement extends HTMLElement {
-}
-
-declare var HTMLSpanElement: {
-    prototype: HTMLSpanElement;
-    new(): HTMLSpanElement;
-}
-
-interface HTMLStyleElement extends HTMLElement, LinkStyle {
-    disabled: boolean;
-    /**
-      * Sets or retrieves the media type.
-      */
-    media: string;
-    /**
-      * Retrieves the CSS language in which the style sheet is written.
-      */
-    type: string;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLStyleElement: {
-    prototype: HTMLStyleElement;
-    new(): HTMLStyleElement;
-}
-
-interface HTMLTableCaptionElement extends HTMLElement {
-    /**
-      * Sets or retrieves the alignment of the caption or legend.
-      */
-    align: string;
-    /**
-      * Sets or retrieves whether the caption appears at the top or bottom of the table.
-      */
-    vAlign: string;
-}
-
-declare var HTMLTableCaptionElement: {
-    prototype: HTMLTableCaptionElement;
-    new(): HTMLTableCaptionElement;
-}
-
-interface HTMLTableCellElement extends HTMLElement, HTMLTableAlignment {
-    /**
-      * Sets or retrieves abbreviated text for the object.
-      */
-    abbr: string;
-    /**
-      * Sets or retrieves how the object is aligned with adjacent text.
-      */
-    align: string;
-    /**
-      * Sets or retrieves a comma-delimited list of conceptual categories associated with the object.
-      */
-    axis: string;
-    bgColor: any;
-    /**
-      * Retrieves the position of the object in the cells collection of a row.
-      */
-    readonly cellIndex: number;
-    /**
-      * Sets or retrieves the number columns in the table that the object should span.
-      */
-    colSpan: number;
-    /**
-      * Sets or retrieves a list of header cells that provide information for the object.
-      */
-    headers: string;
-    /**
-      * Sets or retrieves the height of the object.
-      */
-    height: any;
-    /**
-      * Sets or retrieves whether the browser automatically performs wordwrap.
-      */
-    noWrap: boolean;
-    /**
-      * Sets or retrieves how many rows in a table the cell should span.
-      */
-    rowSpan: number;
-    /**
-      * Sets or retrieves the group of cells in a table to which the object's information applies.
-      */
-    scope: string;
-    /**
-      * Sets or retrieves the width of the object.
-      */
-    width: string;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLTableCellElement: {
-    prototype: HTMLTableCellElement;
-    new(): HTMLTableCellElement;
-}
-
-interface HTMLTableColElement extends HTMLElement, HTMLTableAlignment {
-    /**
-      * Sets or retrieves the alignment of the object relative to the display or table.
-      */
-    align: string;
-    /**
-      * Sets or retrieves the number of columns in the group.
-      */
-    span: number;
-    /**
-      * Sets or retrieves the width of the object.
-      */
-    width: any;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLTableColElement: {
-    prototype: HTMLTableColElement;
-    new(): HTMLTableColElement;
-}
-
-interface HTMLTableDataCellElement extends HTMLTableCellElement {
-}
-
-declare var HTMLTableDataCellElement: {
-    prototype: HTMLTableDataCellElement;
-    new(): HTMLTableDataCellElement;
-}
-
-interface HTMLTableElement extends HTMLElement {
-    /**
-      * Sets or retrieves a value that indicates the table alignment.
-      */
-    align: string;
-    bgColor: any;
-    /**
-      * Sets or retrieves the width of the border to draw around the object.
-      */
-    border: string;
-    /**
-      * Sets or retrieves the border color of the object. 
-      */
-    borderColor: any;
-    /**
-      * Retrieves the caption object of a table.
-      */
-    caption: HTMLTableCaptionElement;
-    /**
-      * Sets or retrieves the amount of space between the border of the cell and the content of the cell.
-      */
-    cellPadding: string;
-    /**
-      * Sets or retrieves the amount of space between cells in a table.
-      */
-    cellSpacing: string;
-    /**
-      * Sets or retrieves the number of columns in the table.
-      */
-    cols: number;
-    /**
-      * Sets or retrieves the way the border frame around the table is displayed.
-      */
-    frame: string;
-    /**
-      * Sets or retrieves the height of the object.
-      */
-    height: any;
-    /**
-      * Sets or retrieves the number of horizontal rows contained in the object.
-      */
-    rows: HTMLCollectionOf<HTMLTableRowElement>;
-    /**
-      * Sets or retrieves which dividing lines (inner borders) are displayed.
-      */
-    rules: string;
-    /**
-      * Sets or retrieves a description and/or structure of the object.
-      */
-    summary: string;
-    /**
-      * Retrieves a collection of all tBody objects in the table. Objects in this collection are in source order.
-      */
-    tBodies: HTMLCollectionOf<HTMLTableSectionElement>;
-    /**
-      * Retrieves the tFoot object of the table.
-      */
-    tFoot: HTMLTableSectionElement;
-    /**
-      * Retrieves the tHead object of the table.
-      */
-    tHead: HTMLTableSectionElement;
-    /**
-      * Sets or retrieves the width of the object.
-      */
-    width: string;
-    /**
-      * Creates an empty caption element in the table.
-      */
-    createCaption(): HTMLTableCaptionElement;
-    /**
-      * Creates an empty tBody element in the table.
-      */
-    createTBody(): HTMLTableSectionElement;
-    /**
-      * Creates an empty tFoot element in the table.
-      */
-    createTFoot(): HTMLTableSectionElement;
-    /**
-      * Returns the tHead element object if successful, or null otherwise.
-      */
-    createTHead(): HTMLTableSectionElement;
-    /**
-      * Deletes the caption element and its contents from the table.
-      */
-    deleteCaption(): void;
-    /**
-      * Removes the specified row (tr) from the element and from the rows collection.
-      * @param index Number that specifies the zero-based position in the rows collection of the row to remove.
-      */
-    deleteRow(index?: number): void;
-    /**
-      * Deletes the tFoot element and its contents from the table.
-      */
-    deleteTFoot(): void;
-    /**
-      * Deletes the tHead element and its contents from the table.
-      */
-    deleteTHead(): void;
-    /**
-      * Creates a new row (tr) in the table, and adds the row to the rows collection.
-      * @param index Number that specifies where to insert the row in the rows collection. The default value is -1, which appends the new row to the end of the rows collection.
-      */
-    insertRow(index?: number): HTMLTableRowElement;
-}
-
-declare var HTMLTableElement: {
-    prototype: HTMLTableElement;
-    new(): HTMLTableElement;
-}
-
-interface HTMLTableHeaderCellElement extends HTMLTableCellElement {
-    /**
-      * Sets or retrieves the group of cells in a table to which the object's information applies.
-      */
-    scope: string;
-}
-
-declare var HTMLTableHeaderCellElement: {
-    prototype: HTMLTableHeaderCellElement;
-    new(): HTMLTableHeaderCellElement;
-}
-
-interface HTMLTableRowElement extends HTMLElement, HTMLTableAlignment {
-    /**
-      * Sets or retrieves how the object is aligned with adjacent text.
-      */
-    align: string;
-    bgColor: any;
-    /**
-      * Retrieves a collection of all cells in the table row.
-      */
-    cells: HTMLCollectionOf<HTMLTableDataCellElement | HTMLTableHeaderCellElement>;
-    /**
-      * Sets or retrieves the height of the object.
-      */
-    height: any;
-    /**
-      * Retrieves the position of the object in the rows collection for the table.
-      */
-    readonly rowIndex: number;
-    /**
-      * Retrieves the position of the object in the collection.
-      */
-    readonly sectionRowIndex: number;
-    /**
-      * Removes the specified cell from the table row, as well as from the cells collection.
-      * @param index Number that specifies the zero-based position of the cell to remove from the table row. If no value is provided, the last cell in the cells collection is deleted.
-      */
-    deleteCell(index?: number): void;
-    /**
-      * Creates a new cell in the table row, and adds the cell to the cells collection.
-      * @param index Number that specifies where to insert the cell in the tr. The default value is -1, which appends the new cell to the end of the cells collection.
-      */
-    insertCell(index?: number): HTMLTableDataCellElement;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLTableRowElement: {
-    prototype: HTMLTableRowElement;
-    new(): HTMLTableRowElement;
-}
-
-interface HTMLTableSectionElement extends HTMLElement, HTMLTableAlignment {
-    /**
-      * Sets or retrieves a value that indicates the table alignment.
-      */
-    align: string;
-    /**
-      * Sets or retrieves the number of horizontal rows contained in the object.
-      */
-    rows: HTMLCollectionOf<HTMLTableRowElement>;
-    /**
-      * Removes the specified row (tr) from the element and from the rows collection.
-      * @param index Number that specifies the zero-based position in the rows collection of the row to remove.
-      */
-    deleteRow(index?: number): void;
-    /**
-      * Creates a new row (tr) in the table, and adds the row to the rows collection.
-      * @param index Number that specifies where to insert the row in the rows collection. The default value is -1, which appends the new row to the end of the rows collection.
-      */
-    insertRow(index?: number): HTMLTableRowElement;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLTableSectionElement: {
-    prototype: HTMLTableSectionElement;
-    new(): HTMLTableSectionElement;
-}
-
-interface HTMLTemplateElement extends HTMLElement {
-    readonly content: DocumentFragment;
-}
-
-declare var HTMLTemplateElement: {
-    prototype: HTMLTemplateElement;
-    new(): HTMLTemplateElement;
-}
-
-interface HTMLTextAreaElement extends HTMLElement {
-    /**
-      * Provides a way to direct a user to a specific field when a document loads. This can provide both direction and convenience for a user, reducing the need to click or tab to a field when a page opens. This attribute is true when present on an element, and false when missing.
-      */
-    autofocus: boolean;
-    /**
-      * Sets or retrieves the width of the object.
-      */
-    cols: number;
-    /**
-      * Sets or retrieves the initial contents of the object.
-      */
-    defaultValue: string;
-    disabled: boolean;
-    /**
-      * Retrieves a reference to the form that the object is embedded in.
-      */
-    readonly form: HTMLFormElement;
-    /**
-      * Sets or retrieves the maximum number of characters that the user can enter in a text control.
-      */
-    maxLength: number;
-    /**
-      * Sets or retrieves the name of the object.
-      */
-    name: string;
-    /**
-      * Gets or sets a text string that is displayed in an input field as a hint or prompt to users as the format or type of information they need to enter.The text appears in an input field until the user puts focus on the field.
-      */
-    placeholder: string;
-    /**
-      * Sets or retrieves the value indicated whether the content of the object is read-only.
-      */
-    readOnly: boolean;
-    /**
-      * When present, marks an element that can't be submitted without a value.
-      */
-    required: boolean;
-    /**
-      * Sets or retrieves the number of horizontal rows contained in the object.
-      */
-    rows: number;
-    /**
-      * Gets or sets the end position or offset of a text selection.
-      */
-    selectionEnd: number;
-    /**
-      * Gets or sets the starting position or offset of a text selection.
-      */
-    selectionStart: number;
-    /**
-      * Sets or retrieves the value indicating whether the control is selected.
-      */
-    status: any;
-    /**
-      * Retrieves the type of control.
-      */
-    readonly type: string;
-    /**
-      * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
-      */
-    readonly validationMessage: string;
-    /**
-      * Returns a  ValidityState object that represents the validity states of an element.
-      */
-    readonly validity: ValidityState;
-    /**
-      * Retrieves or sets the text in the entry field of the textArea element.
-      */
-    value: string;
-    /**
-      * Returns whether an element will successfully validate based on forms validation rules and constraints.
-      */
-    readonly willValidate: boolean;
-    /**
-      * Sets or retrieves how to handle wordwrapping in the object.
-      */
-    wrap: string;
-    minLength: number;
-    /**
-      * Returns whether a form will validate when it is submitted, without having to submit it.
-      */
-    checkValidity(): boolean;
-    /**
-      * Highlights the input area of a form element.
-      */
-    select(): void;
-    /**
-      * Sets a custom error message that is displayed when a form is submitted.
-      * @param error Sets a custom error message that is displayed when a form is submitted.
-      */
-    setCustomValidity(error: string): void;
-    /**
-      * Sets the start and end positions of a selection in a text field.
-      * @param start The offset into the text field for the start of the selection.
-      * @param end The offset into the text field for the end of the selection.
-      */
-    setSelectionRange(start: number, end: number): void;
-}
-
-declare var HTMLTextAreaElement: {
-    prototype: HTMLTextAreaElement;
-    new(): HTMLTextAreaElement;
-}
-
-interface HTMLTitleElement extends HTMLElement {
-    /**
-      * Retrieves or sets the text of the object as a string. 
-      */
-    text: string;
-}
-
-declare var HTMLTitleElement: {
-    prototype: HTMLTitleElement;
-    new(): HTMLTitleElement;
-}
-
-interface HTMLTrackElement extends HTMLElement {
-    default: boolean;
-    kind: string;
-    label: string;
-    readonly readyState: number;
-    src: string;
-    srclang: string;
-    readonly track: TextTrack;
-    readonly ERROR: number;
-    readonly LOADED: number;
-    readonly LOADING: number;
-    readonly NONE: number;
-}
-
-declare var HTMLTrackElement: {
-    prototype: HTMLTrackElement;
-    new(): HTMLTrackElement;
-    readonly ERROR: number;
-    readonly LOADED: number;
-    readonly LOADING: number;
-    readonly NONE: number;
-}
-
-interface HTMLUListElement extends HTMLElement {
-    compact: boolean;
-    type: string;
-}
-
-declare var HTMLUListElement: {
-    prototype: HTMLUListElement;
-    new(): HTMLUListElement;
-}
-
-interface HTMLUnknownElement extends HTMLElement {
-}
-
-declare var HTMLUnknownElement: {
-    prototype: HTMLUnknownElement;
-    new(): HTMLUnknownElement;
-}
-
-interface HTMLVideoElement extends HTMLMediaElement {
-    /**
-      * Gets or sets the height of the video element.
-      */
-    height: number;
-    msHorizontalMirror: boolean;
-    readonly msIsLayoutOptimalForPlayback: boolean;
-    readonly msIsStereo3D: boolean;
-    msStereo3DPackingMode: string;
-    msStereo3DRenderMode: string;
-    msZoom: boolean;
-    onMSVideoFormatChanged: (this: this, ev: Event) => any;
-    onMSVideoFrameStepCompleted: (this: this, ev: Event) => any;
-    onMSVideoOptimalLayoutChanged: (this: this, ev: Event) => any;
-    /**
-      * Gets or sets a URL of an image to display, for example, like a movie poster. This can be a still frame from the video, or another image if no video data is available.
-      */
-    poster: string;
-    /**
-      * Gets the intrinsic height of a video in CSS pixels, or zero if the dimensions are not known.
-      */
-    readonly videoHeight: number;
-    /**
-      * Gets the intrinsic width of a video in CSS pixels, or zero if the dimensions are not known.
-      */
-    readonly videoWidth: number;
-    readonly webkitDisplayingFullscreen: boolean;
-    readonly webkitSupportsFullscreen: boolean;
-    /**
-      * Gets or sets the width of the video element.
-      */
-    width: number;
-    getVideoPlaybackQuality(): VideoPlaybackQuality;
-    msFrameStep(forward: boolean): void;
-    msInsertVideoEffect(activatableClassId: string, effectRequired: boolean, config?: any): void;
-    msSetVideoRectangle(left: number, top: number, right: number, bottom: number): void;
-    webkitEnterFullScreen(): void;
-    webkitEnterFullscreen(): void;
-    webkitExitFullScreen(): void;
-    webkitExitFullscreen(): void;
-    addEventListener(type: "MSContentZoom", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureChange", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureDoubleTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureEnd", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureHold", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGotPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSInertiaStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSLostPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSManipulationStateChanged", listener: (this: this, ev: MSManipulationEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerCancel", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerDown", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerEnter", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerLeave", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerMove", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOut", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOver", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerUp", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSVideoFormatChanged", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSVideoFrameStepCompleted", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSVideoOptimalLayoutChanged", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "abort", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "activate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ariarequest", listener: (this: this, ev: AriaRequestEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforecopy", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforecut", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforedeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforepaste", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "blur", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplay", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplaythrough", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "change", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "click", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "command", listener: (this: this, ev: CommandEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "contextmenu", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "copy", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "cuechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "cut", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dblclick", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "deactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drag", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragend", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragenter", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragleave", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragover", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragstart", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drop", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "durationchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "emptied", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "encrypted", listener: (this: this, ev: MediaEncryptedEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ended", listener: (this: this, ev: MediaStreamErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "focus", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "gotpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "input", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "invalid", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "keydown", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keypress", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keyup", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadeddata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadedmetadata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "lostpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousedown", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseenter", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseleave", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousemove", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseout", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseover", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseup", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousewheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "msneedkey", listener: (this: this, ev: MSMediaKeyNeededEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "paste", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pause", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "play", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "playing", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointercancel", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerdown", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerenter", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerleave", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointermove", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerout", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerover", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerup", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "progress", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ratechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "reset", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "scroll", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeked", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeking", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "select", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "selectstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "stalled", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "submit", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "suspend", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "timeupdate", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchcancel", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchend", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchmove", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchstart", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "volumechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "waiting", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenerror", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "wheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLVideoElement: {
-    prototype: HTMLVideoElement;
-    new(): HTMLVideoElement;
-}
-
-interface HashChangeEvent extends Event {
-    readonly newURL: string | null;
-    readonly oldURL: string | null;
-}
-
-declare var HashChangeEvent: {
-    prototype: HashChangeEvent;
-    new(type: string, eventInitDict?: HashChangeEventInit): HashChangeEvent;
-}
-
-interface History {
-    readonly length: number;
-    readonly state: any;
-    scrollRestoration: ScrollRestoration;
-    back(): void;
-    forward(): void;
-    go(delta?: number): void;
-    pushState(data: any, title: string, url?: string | null): void;
-    replaceState(data: any, title: string, url?: string | null): void;
-}
-
-declare var History: {
-    prototype: History;
-    new(): History;
-}
-
-interface IDBCursor {
-    readonly direction: string;
-    key: IDBKeyRange | IDBValidKey;
-    readonly primaryKey: any;
-    source: IDBObjectStore | IDBIndex;
-    advance(count: number): void;
-    continue(key?: IDBKeyRange | IDBValidKey): void;
-    delete(): IDBRequest;
-    update(value: any): IDBRequest;
-    readonly NEXT: string;
-    readonly NEXT_NO_DUPLICATE: string;
-    readonly PREV: string;
-    readonly PREV_NO_DUPLICATE: string;
-}
-
-declare var IDBCursor: {
-    prototype: IDBCursor;
-    new(): IDBCursor;
-    readonly NEXT: string;
-    readonly NEXT_NO_DUPLICATE: string;
-    readonly PREV: string;
-    readonly PREV_NO_DUPLICATE: string;
-}
-
-interface IDBCursorWithValue extends IDBCursor {
-    readonly value: any;
-}
-
-declare var IDBCursorWithValue: {
-    prototype: IDBCursorWithValue;
-    new(): IDBCursorWithValue;
-}
-
-interface IDBDatabase extends EventTarget {
-    readonly name: string;
-    readonly objectStoreNames: DOMStringList;
-    onabort: (this: this, ev: Event) => any;
-    onerror: (this: this, ev: ErrorEvent) => any;
-    version: number;
-    onversionchange: (ev: IDBVersionChangeEvent) => any;
-    close(): void;
-    createObjectStore(name: string, optionalParameters?: IDBObjectStoreParameters): IDBObjectStore;
-    deleteObjectStore(name: string): void;
-    transaction(storeNames: string | string[], mode?: string): IDBTransaction;
-    addEventListener(type: "versionchange", listener: (ev: IDBVersionChangeEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "abort", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var IDBDatabase: {
-    prototype: IDBDatabase;
-    new(): IDBDatabase;
-}
-
-interface IDBFactory {
-    cmp(first: any, second: any): number;
-    deleteDatabase(name: string): IDBOpenDBRequest;
-    open(name: string, version?: number): IDBOpenDBRequest;
-}
-
-declare var IDBFactory: {
-    prototype: IDBFactory;
-    new(): IDBFactory;
-}
-
-interface IDBIndex {
-    keyPath: string | string[];
-    readonly name: string;
-    readonly objectStore: IDBObjectStore;
-    readonly unique: boolean;
-    multiEntry: boolean;
-    count(key?: IDBKeyRange | IDBValidKey): IDBRequest;
-    get(key: IDBKeyRange | IDBValidKey): IDBRequest;
-    getKey(key: IDBKeyRange | IDBValidKey): IDBRequest;
-    openCursor(range?: IDBKeyRange | IDBValidKey, direction?: string): IDBRequest;
-    openKeyCursor(range?: IDBKeyRange | IDBValidKey, direction?: string): IDBRequest;
-}
-
-declare var IDBIndex: {
-    prototype: IDBIndex;
-    new(): IDBIndex;
-}
-
-interface IDBKeyRange {
-    readonly lower: any;
-    readonly lowerOpen: boolean;
-    readonly upper: any;
-    readonly upperOpen: boolean;
-}
-
-declare var IDBKeyRange: {
-    prototype: IDBKeyRange;
-    new(): IDBKeyRange;
-    bound(lower: any, upper: any, lowerOpen?: boolean, upperOpen?: boolean): IDBKeyRange;
-    lowerBound(lower: any, open?: boolean): IDBKeyRange;
-    only(value: any): IDBKeyRange;
-    upperBound(upper: any, open?: boolean): IDBKeyRange;
-}
-
-interface IDBObjectStore {
-    readonly indexNames: DOMStringList;
-    keyPath: string | string[];
-    readonly name: string;
-    readonly transaction: IDBTransaction;
-    autoIncrement: boolean;
-    add(value: any, key?: IDBKeyRange | IDBValidKey): IDBRequest;
-    clear(): IDBRequest;
-    count(key?: IDBKeyRange | IDBValidKey): IDBRequest;
-    createIndex(name: string, keyPath: string | string[], optionalParameters?: IDBIndexParameters): IDBIndex;
-    delete(key: IDBKeyRange | IDBValidKey): IDBRequest;
-    deleteIndex(indexName: string): void;
-    get(key: any): IDBRequest;
-    index(name: string): IDBIndex;
-    openCursor(range?: IDBKeyRange | IDBValidKey, direction?: string): IDBRequest;
-    put(value: any, key?: IDBKeyRange | IDBValidKey): IDBRequest;
-}
-
-declare var IDBObjectStore: {
-    prototype: IDBObjectStore;
-    new(): IDBObjectStore;
-}
-
-interface IDBOpenDBRequest extends IDBRequest {
-    onblocked: (this: this, ev: Event) => any;
-    onupgradeneeded: (this: this, ev: IDBVersionChangeEvent) => any;
-    addEventListener(type: "blocked", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "success", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "upgradeneeded", listener: (this: this, ev: IDBVersionChangeEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var IDBOpenDBRequest: {
-    prototype: IDBOpenDBRequest;
-    new(): IDBOpenDBRequest;
-}
-
-interface IDBRequest extends EventTarget {
-    readonly error: DOMError;
-    onerror: (this: this, ev: ErrorEvent) => any;
-    onsuccess: (this: this, ev: Event) => any;
-    readonly readyState: string;
-    readonly result: any;
-    source: IDBObjectStore | IDBIndex | IDBCursor;
-    readonly transaction: IDBTransaction;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "success", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var IDBRequest: {
-    prototype: IDBRequest;
-    new(): IDBRequest;
-}
-
-interface IDBTransaction extends EventTarget {
-    readonly db: IDBDatabase;
-    readonly error: DOMError;
-    readonly mode: string;
-    onabort: (this: this, ev: Event) => any;
-    oncomplete: (this: this, ev: Event) => any;
-    onerror: (this: this, ev: ErrorEvent) => any;
-    abort(): void;
-    objectStore(name: string): IDBObjectStore;
-    readonly READ_ONLY: string;
-    readonly READ_WRITE: string;
-    readonly VERSION_CHANGE: string;
-    addEventListener(type: "abort", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "complete", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var IDBTransaction: {
-    prototype: IDBTransaction;
-    new(): IDBTransaction;
-    readonly READ_ONLY: string;
-    readonly READ_WRITE: string;
-    readonly VERSION_CHANGE: string;
-}
-
-interface IDBVersionChangeEvent extends Event {
-    readonly newVersion: number | null;
-    readonly oldVersion: number;
-}
-
-declare var IDBVersionChangeEvent: {
-    prototype: IDBVersionChangeEvent;
-    new(): IDBVersionChangeEvent;
-}
-
-interface ImageData {
-    data: Uint8ClampedArray;
-    readonly height: number;
-    readonly width: number;
-}
-
-declare var ImageData: {
-    prototype: ImageData;
-    new(width: number, height: number): ImageData;
-    new(array: Uint8ClampedArray, width: number, height: number): ImageData;
-}
-
-interface KeyboardEvent extends UIEvent {
-    readonly altKey: boolean;
-    readonly char: string | null;
-    readonly charCode: number;
-    readonly ctrlKey: boolean;
-    readonly key: string;
-    readonly keyCode: number;
-    readonly locale: string;
-    readonly location: number;
-    readonly metaKey: boolean;
-    readonly repeat: boolean;
-    readonly shiftKey: boolean;
-    readonly which: number;
-    readonly code: string;
-    getModifierState(keyArg: string): boolean;
-    initKeyboardEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, keyArg: string, locationArg: number, modifiersListArg: string, repeat: boolean, locale: string): void;
-    readonly DOM_KEY_LOCATION_JOYSTICK: number;
-    readonly DOM_KEY_LOCATION_LEFT: number;
-    readonly DOM_KEY_LOCATION_MOBILE: number;
-    readonly DOM_KEY_LOCATION_NUMPAD: number;
-    readonly DOM_KEY_LOCATION_RIGHT: number;
-    readonly DOM_KEY_LOCATION_STANDARD: number;
-}
-
-declare var KeyboardEvent: {
-    prototype: KeyboardEvent;
-    new(typeArg: string, eventInitDict?: KeyboardEventInit): KeyboardEvent;
-    readonly DOM_KEY_LOCATION_JOYSTICK: number;
-    readonly DOM_KEY_LOCATION_LEFT: number;
-    readonly DOM_KEY_LOCATION_MOBILE: number;
-    readonly DOM_KEY_LOCATION_NUMPAD: number;
-    readonly DOM_KEY_LOCATION_RIGHT: number;
-    readonly DOM_KEY_LOCATION_STANDARD: number;
-}
-
-interface ListeningStateChangedEvent extends Event {
-    readonly label: string;
-    readonly state: string;
-}
-
-declare var ListeningStateChangedEvent: {
-    prototype: ListeningStateChangedEvent;
-    new(): ListeningStateChangedEvent;
-}
-
-interface Location {
-    hash: string;
-    host: string;
-    hostname: string;
-    href: string;
-    readonly origin: string;
-    pathname: string;
-    port: string;
-    protocol: string;
-    search: string;
-    assign(url: string): void;
-    reload(forcedReload?: boolean): void;
-    replace(url: string): void;
-    toString(): string;
-}
-
-declare var Location: {
-    prototype: Location;
-    new(): Location;
-}
-
-interface LongRunningScriptDetectedEvent extends Event {
-    readonly executionTime: number;
-    stopPageScriptExecution: boolean;
-}
-
-declare var LongRunningScriptDetectedEvent: {
-    prototype: LongRunningScriptDetectedEvent;
-    new(): LongRunningScriptDetectedEvent;
-}
-
-interface MSApp {
-    clearTemporaryWebDataAsync(): MSAppAsyncOperation;
-    createBlobFromRandomAccessStream(type: string, seeker: any): Blob;
-    createDataPackage(object: any): any;
-    createDataPackageFromSelection(): any;
-    createFileFromStorageFile(storageFile: any): File;
-    createStreamFromInputStream(type: string, inputStream: any): MSStream;
-    execAsyncAtPriority(asynchronousCallback: MSExecAtPriorityFunctionCallback, priority: string, ...args: any[]): void;
-    execAtPriority(synchronousCallback: MSExecAtPriorityFunctionCallback, priority: string, ...args: any[]): any;
-    getCurrentPriority(): string;
-    getHtmlPrintDocumentSourceAsync(htmlDoc: any): PromiseLike<any>;
-    getViewId(view: any): any;
-    isTaskScheduledAtPriorityOrHigher(priority: string): boolean;
-    pageHandlesAllApplicationActivations(enabled: boolean): void;
-    suppressSubdownloadCredentialPrompts(suppress: boolean): void;
-    terminateApp(exceptionObject: any): void;
-    readonly CURRENT: string;
-    readonly HIGH: string;
-    readonly IDLE: string;
-    readonly NORMAL: string;
-}
-declare var MSApp: MSApp;
-
-interface MSAppAsyncOperation extends EventTarget {
-    readonly error: DOMError;
-    oncomplete: (this: this, ev: Event) => any;
-    onerror: (this: this, ev: ErrorEvent) => any;
-    readonly readyState: number;
-    readonly result: any;
-    start(): void;
-    readonly COMPLETED: number;
-    readonly ERROR: number;
-    readonly STARTED: number;
-    addEventListener(type: "complete", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var MSAppAsyncOperation: {
-    prototype: MSAppAsyncOperation;
-    new(): MSAppAsyncOperation;
-    readonly COMPLETED: number;
-    readonly ERROR: number;
-    readonly STARTED: number;
-}
-
-interface MSAssertion {
-    readonly id: string;
-    readonly type: string;
-}
-
-declare var MSAssertion: {
-    prototype: MSAssertion;
-    new(): MSAssertion;
-}
-
-interface MSBlobBuilder {
-    append(data: any, endings?: string): void;
-    getBlob(contentType?: string): Blob;
-}
-
-declare var MSBlobBuilder: {
-    prototype: MSBlobBuilder;
-    new(): MSBlobBuilder;
-}
-
-interface MSCredentials {
-    getAssertion(challenge: string, filter?: MSCredentialFilter, params?: MSSignatureParameters): PromiseLike<MSAssertion>;
-    makeCredential(accountInfo: MSAccountInfo, params: MSCredentialParameters[], challenge?: string): PromiseLike<MSAssertion>;
-}
-
-declare var MSCredentials: {
-    prototype: MSCredentials;
-    new(): MSCredentials;
-}
-
-interface MSFIDOCredentialAssertion extends MSAssertion {
-    readonly algorithm: string | Algorithm;
-    readonly attestation: any;
-    readonly publicKey: string;
-    readonly transportHints: string[];
-}
-
-declare var MSFIDOCredentialAssertion: {
-    prototype: MSFIDOCredentialAssertion;
-    new(): MSFIDOCredentialAssertion;
-}
-
-interface MSFIDOSignature {
-    readonly authnrData: string;
-    readonly clientData: string;
-    readonly signature: string;
-}
-
-declare var MSFIDOSignature: {
-    prototype: MSFIDOSignature;
-    new(): MSFIDOSignature;
-}
-
-interface MSFIDOSignatureAssertion extends MSAssertion {
-    readonly signature: MSFIDOSignature;
-}
-
-declare var MSFIDOSignatureAssertion: {
-    prototype: MSFIDOSignatureAssertion;
-    new(): MSFIDOSignatureAssertion;
-}
-
-interface MSGesture {
-    target: Element;
-    addPointer(pointerId: number): void;
-    stop(): void;
-}
-
-declare var MSGesture: {
-    prototype: MSGesture;
-    new(): MSGesture;
-}
-
-interface MSGestureEvent extends UIEvent {
-    readonly clientX: number;
-    readonly clientY: number;
-    readonly expansion: number;
-    readonly gestureObject: any;
-    readonly hwTimestamp: number;
-    readonly offsetX: number;
-    readonly offsetY: number;
-    readonly rotation: number;
-    readonly scale: number;
-    readonly screenX: number;
-    readonly screenY: number;
-    readonly translationX: number;
-    readonly translationY: number;
-    readonly velocityAngular: number;
-    readonly velocityExpansion: number;
-    readonly velocityX: number;
-    readonly velocityY: number;
-    initGestureEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, offsetXArg: number, offsetYArg: number, translationXArg: number, translationYArg: number, scaleArg: number, expansionArg: number, rotationArg: number, velocityXArg: number, velocityYArg: number, velocityExpansionArg: number, velocityAngularArg: number, hwTimestampArg: number): void;
-    readonly MSGESTURE_FLAG_BEGIN: number;
-    readonly MSGESTURE_FLAG_CANCEL: number;
-    readonly MSGESTURE_FLAG_END: number;
-    readonly MSGESTURE_FLAG_INERTIA: number;
-    readonly MSGESTURE_FLAG_NONE: number;
-}
-
-declare var MSGestureEvent: {
-    prototype: MSGestureEvent;
-    new(): MSGestureEvent;
-    readonly MSGESTURE_FLAG_BEGIN: number;
-    readonly MSGESTURE_FLAG_CANCEL: number;
-    readonly MSGESTURE_FLAG_END: number;
-    readonly MSGESTURE_FLAG_INERTIA: number;
-    readonly MSGESTURE_FLAG_NONE: number;
-}
-
-interface MSGraphicsTrust {
-    readonly constrictionActive: boolean;
-    readonly status: string;
-}
-
-declare var MSGraphicsTrust: {
-    prototype: MSGraphicsTrust;
-    new(): MSGraphicsTrust;
-}
-
-interface MSHTMLWebViewElement extends HTMLElement {
-    readonly canGoBack: boolean;
-    readonly canGoForward: boolean;
-    readonly containsFullScreenElement: boolean;
-    readonly documentTitle: string;
-    height: number;
-    readonly settings: MSWebViewSettings;
-    src: string;
-    width: number;
-    addWebAllowedObject(name: string, applicationObject: any): void;
-    buildLocalStreamUri(contentIdentifier: string, relativePath: string): string;
-    capturePreviewToBlobAsync(): MSWebViewAsyncOperation;
-    captureSelectedContentToDataPackageAsync(): MSWebViewAsyncOperation;
-    getDeferredPermissionRequestById(id: number): DeferredPermissionRequest;
-    getDeferredPermissionRequests(): DeferredPermissionRequest[];
-    goBack(): void;
-    goForward(): void;
-    invokeScriptAsync(scriptName: string, ...args: any[]): MSWebViewAsyncOperation;
-    navigate(uri: string): void;
-    navigateToLocalStreamUri(source: string, streamResolver: any): void;
-    navigateToString(contents: string): void;
-    navigateWithHttpRequestMessage(requestMessage: any): void;
-    refresh(): void;
-    stop(): void;
-}
-
-declare var MSHTMLWebViewElement: {
-    prototype: MSHTMLWebViewElement;
-    new(): MSHTMLWebViewElement;
-}
-
-interface MSInputMethodContext extends EventTarget {
-    readonly compositionEndOffset: number;
-    readonly compositionStartOffset: number;
-    oncandidatewindowhide: (this: this, ev: Event) => any;
-    oncandidatewindowshow: (this: this, ev: Event) => any;
-    oncandidatewindowupdate: (this: this, ev: Event) => any;
-    readonly target: HTMLElement;
-    getCandidateWindowClientRect(): ClientRect;
-    getCompositionAlternatives(): string[];
-    hasComposition(): boolean;
-    isCandidateWindowVisible(): boolean;
-    addEventListener(type: "MSCandidateWindowHide", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSCandidateWindowShow", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSCandidateWindowUpdate", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var MSInputMethodContext: {
-    prototype: MSInputMethodContext;
-    new(): MSInputMethodContext;
-}
-
-interface MSManipulationEvent extends UIEvent {
-    readonly currentState: number;
-    readonly inertiaDestinationX: number;
-    readonly inertiaDestinationY: number;
-    readonly lastState: number;
-    initMSManipulationEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, lastState: number, currentState: number): void;
-    readonly MS_MANIPULATION_STATE_ACTIVE: number;
-    readonly MS_MANIPULATION_STATE_CANCELLED: number;
-    readonly MS_MANIPULATION_STATE_COMMITTED: number;
-    readonly MS_MANIPULATION_STATE_DRAGGING: number;
-    readonly MS_MANIPULATION_STATE_INERTIA: number;
-    readonly MS_MANIPULATION_STATE_PRESELECT: number;
-    readonly MS_MANIPULATION_STATE_SELECTING: number;
-    readonly MS_MANIPULATION_STATE_STOPPED: number;
-}
-
-declare var MSManipulationEvent: {
-    prototype: MSManipulationEvent;
-    new(): MSManipulationEvent;
-    readonly MS_MANIPULATION_STATE_ACTIVE: number;
-    readonly MS_MANIPULATION_STATE_CANCELLED: number;
-    readonly MS_MANIPULATION_STATE_COMMITTED: number;
-    readonly MS_MANIPULATION_STATE_DRAGGING: number;
-    readonly MS_MANIPULATION_STATE_INERTIA: number;
-    readonly MS_MANIPULATION_STATE_PRESELECT: number;
-    readonly MS_MANIPULATION_STATE_SELECTING: number;
-    readonly MS_MANIPULATION_STATE_STOPPED: number;
-}
-
-interface MSMediaKeyError {
-    readonly code: number;
-    readonly systemCode: number;
-    readonly MS_MEDIA_KEYERR_CLIENT: number;
-    readonly MS_MEDIA_KEYERR_DOMAIN: number;
-    readonly MS_MEDIA_KEYERR_HARDWARECHANGE: number;
-    readonly MS_MEDIA_KEYERR_OUTPUT: number;
-    readonly MS_MEDIA_KEYERR_SERVICE: number;
-    readonly MS_MEDIA_KEYERR_UNKNOWN: number;
-}
-
-declare var MSMediaKeyError: {
-    prototype: MSMediaKeyError;
-    new(): MSMediaKeyError;
-    readonly MS_MEDIA_KEYERR_CLIENT: number;
-    readonly MS_MEDIA_KEYERR_DOMAIN: number;
-    readonly MS_MEDIA_KEYERR_HARDWARECHANGE: number;
-    readonly MS_MEDIA_KEYERR_OUTPUT: number;
-    readonly MS_MEDIA_KEYERR_SERVICE: number;
-    readonly MS_MEDIA_KEYERR_UNKNOWN: number;
-}
-
-interface MSMediaKeyMessageEvent extends Event {
-    readonly destinationURL: string | null;
-    readonly message: Uint8Array;
-}
-
-declare var MSMediaKeyMessageEvent: {
-    prototype: MSMediaKeyMessageEvent;
-    new(): MSMediaKeyMessageEvent;
-}
-
-interface MSMediaKeyNeededEvent extends Event {
-    readonly initData: Uint8Array | null;
-}
-
-declare var MSMediaKeyNeededEvent: {
-    prototype: MSMediaKeyNeededEvent;
-    new(): MSMediaKeyNeededEvent;
-}
-
-interface MSMediaKeySession extends EventTarget {
-    readonly error: MSMediaKeyError | null;
-    readonly keySystem: string;
-    readonly sessionId: string;
-    close(): void;
-    update(key: Uint8Array): void;
-}
-
-declare var MSMediaKeySession: {
-    prototype: MSMediaKeySession;
-    new(): MSMediaKeySession;
-}
-
-interface MSMediaKeys {
-    readonly keySystem: string;
-    createSession(type: string, initData: Uint8Array, cdmData?: Uint8Array): MSMediaKeySession;
-}
-
-declare var MSMediaKeys: {
-    prototype: MSMediaKeys;
-    new(keySystem: string): MSMediaKeys;
-    isTypeSupported(keySystem: string, type?: string): boolean;
-    isTypeSupportedWithFeatures(keySystem: string, type?: string): string;
-}
-
-interface MSPointerEvent extends MouseEvent {
-    readonly currentPoint: any;
-    readonly height: number;
-    readonly hwTimestamp: number;
-    readonly intermediatePoints: any;
-    readonly isPrimary: boolean;
-    readonly pointerId: number;
-    readonly pointerType: any;
-    readonly pressure: number;
-    readonly rotation: number;
-    readonly tiltX: number;
-    readonly tiltY: number;
-    readonly width: number;
-    getCurrentPoint(element: Element): void;
-    getIntermediatePoints(element: Element): void;
-    initPointerEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, ctrlKeyArg: boolean, altKeyArg: boolean, shiftKeyArg: boolean, metaKeyArg: boolean, buttonArg: number, relatedTargetArg: EventTarget, offsetXArg: number, offsetYArg: number, widthArg: number, heightArg: number, pressure: number, rotation: number, tiltX: number, tiltY: number, pointerIdArg: number, pointerType: any, hwTimestampArg: number, isPrimary: boolean): void;
-}
-
-declare var MSPointerEvent: {
-    prototype: MSPointerEvent;
-    new(typeArg: string, eventInitDict?: PointerEventInit): MSPointerEvent;
-}
-
-interface MSRangeCollection {
-    readonly length: number;
-    item(index: number): Range;
-    [index: number]: Range;
-}
-
-declare var MSRangeCollection: {
-    prototype: MSRangeCollection;
-    new(): MSRangeCollection;
-}
-
-interface MSSiteModeEvent extends Event {
-    readonly actionURL: string;
-    readonly buttonID: number;
-}
-
-declare var MSSiteModeEvent: {
-    prototype: MSSiteModeEvent;
-    new(): MSSiteModeEvent;
-}
-
-interface MSStream {
-    readonly type: string;
-    msClose(): void;
-    msDetachStream(): any;
-}
-
-declare var MSStream: {
-    prototype: MSStream;
-    new(): MSStream;
-}
-
-interface MSStreamReader extends EventTarget, MSBaseReader {
-    readonly error: DOMError;
-    readAsArrayBuffer(stream: MSStream, size?: number): void;
-    readAsBinaryString(stream: MSStream, size?: number): void;
-    readAsBlob(stream: MSStream, size?: number): void;
-    readAsDataURL(stream: MSStream, size?: number): void;
-    readAsText(stream: MSStream, encoding?: string, size?: number): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var MSStreamReader: {
-    prototype: MSStreamReader;
-    new(): MSStreamReader;
-}
-
-interface MSWebViewAsyncOperation extends EventTarget {
-    readonly error: DOMError;
-    oncomplete: (this: this, ev: Event) => any;
-    onerror: (this: this, ev: ErrorEvent) => any;
-    readonly readyState: number;
-    readonly result: any;
-    readonly target: MSHTMLWebViewElement;
-    readonly type: number;
-    start(): void;
-    readonly COMPLETED: number;
-    readonly ERROR: number;
-    readonly STARTED: number;
-    readonly TYPE_CAPTURE_PREVIEW_TO_RANDOM_ACCESS_STREAM: number;
-    readonly TYPE_CREATE_DATA_PACKAGE_FROM_SELECTION: number;
-    readonly TYPE_INVOKE_SCRIPT: number;
-    addEventListener(type: "complete", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var MSWebViewAsyncOperation: {
-    prototype: MSWebViewAsyncOperation;
-    new(): MSWebViewAsyncOperation;
-    readonly COMPLETED: number;
-    readonly ERROR: number;
-    readonly STARTED: number;
-    readonly TYPE_CAPTURE_PREVIEW_TO_RANDOM_ACCESS_STREAM: number;
-    readonly TYPE_CREATE_DATA_PACKAGE_FROM_SELECTION: number;
-    readonly TYPE_INVOKE_SCRIPT: number;
-}
-
-interface MSWebViewSettings {
-    isIndexedDBEnabled: boolean;
-    isJavaScriptEnabled: boolean;
-}
-
-declare var MSWebViewSettings: {
-    prototype: MSWebViewSettings;
-    new(): MSWebViewSettings;
-}
-
-interface MediaDeviceInfo {
-    readonly deviceId: string;
-    readonly groupId: string;
-    readonly kind: string;
-    readonly label: string;
-}
-
-declare var MediaDeviceInfo: {
-    prototype: MediaDeviceInfo;
-    new(): MediaDeviceInfo;
-}
-
-interface MediaDevices extends EventTarget {
-    ondevicechange: (this: this, ev: Event) => any;
-    enumerateDevices(): any;
-    getSupportedConstraints(): MediaTrackSupportedConstraints;
-    getUserMedia(constraints: MediaStreamConstraints): PromiseLike<MediaStream>;
-    addEventListener(type: "devicechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var MediaDevices: {
-    prototype: MediaDevices;
-    new(): MediaDevices;
-}
-
-interface MediaElementAudioSourceNode extends AudioNode {
-}
-
-declare var MediaElementAudioSourceNode: {
-    prototype: MediaElementAudioSourceNode;
-    new(): MediaElementAudioSourceNode;
-}
-
-interface MediaEncryptedEvent extends Event {
-    readonly initData: ArrayBuffer | null;
-    readonly initDataType: string;
-}
-
-declare var MediaEncryptedEvent: {
-    prototype: MediaEncryptedEvent;
-    new(type: string, eventInitDict?: MediaEncryptedEventInit): MediaEncryptedEvent;
-}
-
-interface MediaError {
-    readonly code: number;
-    readonly msExtendedCode: number;
-    readonly MEDIA_ERR_ABORTED: number;
-    readonly MEDIA_ERR_DECODE: number;
-    readonly MEDIA_ERR_NETWORK: number;
-    readonly MEDIA_ERR_SRC_NOT_SUPPORTED: number;
-    readonly MS_MEDIA_ERR_ENCRYPTED: number;
-}
-
-declare var MediaError: {
-    prototype: MediaError;
-    new(): MediaError;
-    readonly MEDIA_ERR_ABORTED: number;
-    readonly MEDIA_ERR_DECODE: number;
-    readonly MEDIA_ERR_NETWORK: number;
-    readonly MEDIA_ERR_SRC_NOT_SUPPORTED: number;
-    readonly MS_MEDIA_ERR_ENCRYPTED: number;
-}
-
-interface MediaKeyMessageEvent extends Event {
-    readonly message: ArrayBuffer;
-    readonly messageType: string;
-}
-
-declare var MediaKeyMessageEvent: {
-    prototype: MediaKeyMessageEvent;
-    new(type: string, eventInitDict?: MediaKeyMessageEventInit): MediaKeyMessageEvent;
-}
-
-interface MediaKeySession extends EventTarget {
-    readonly closed: PromiseLike<void>;
-    readonly expiration: number;
-    readonly keyStatuses: MediaKeyStatusMap;
-    readonly sessionId: string;
-    close(): PromiseLike<void>;
-    generateRequest(initDataType: string, initData: any): PromiseLike<void>;
-    load(sessionId: string): PromiseLike<boolean>;
-    remove(): PromiseLike<void>;
-    update(response: any): PromiseLike<void>;
-}
-
-declare var MediaKeySession: {
-    prototype: MediaKeySession;
-    new(): MediaKeySession;
-}
-
-interface MediaKeyStatusMap {
-    readonly size: number;
-    forEach(callback: ForEachCallback): void;
-    get(keyId: any): string;
-    has(keyId: any): boolean;
-}
-
-declare var MediaKeyStatusMap: {
-    prototype: MediaKeyStatusMap;
-    new(): MediaKeyStatusMap;
-}
-
-interface MediaKeySystemAccess {
-    readonly keySystem: string;
-    createMediaKeys(): PromiseLike<MediaKeys>;
-    getConfiguration(): MediaKeySystemConfiguration;
-}
-
-declare var MediaKeySystemAccess: {
-    prototype: MediaKeySystemAccess;
-    new(): MediaKeySystemAccess;
-}
-
-interface MediaKeys {
-    createSession(sessionType?: string): MediaKeySession;
-    setServerCertificate(serverCertificate: any): PromiseLike<void>;
-}
-
-declare var MediaKeys: {
-    prototype: MediaKeys;
-    new(): MediaKeys;
-}
-
-interface MediaList {
-    readonly length: number;
-    mediaText: string;
-    appendMedium(newMedium: string): void;
-    deleteMedium(oldMedium: string): void;
-    item(index: number): string;
-    toString(): string;
-    [index: number]: string;
-}
-
-declare var MediaList: {
-    prototype: MediaList;
-    new(): MediaList;
-}
-
-interface MediaQueryList {
-    readonly matches: boolean;
-    readonly media: string;
-    addListener(listener: MediaQueryListListener): void;
-    removeListener(listener: MediaQueryListListener): void;
-}
-
-declare var MediaQueryList: {
-    prototype: MediaQueryList;
-    new(): MediaQueryList;
-}
-
-interface MediaSource extends EventTarget {
-    readonly activeSourceBuffers: SourceBufferList;
-    duration: number;
-    readonly readyState: string;
-    readonly sourceBuffers: SourceBufferList;
-    addSourceBuffer(type: string): SourceBuffer;
-    endOfStream(error?: number): void;
-    removeSourceBuffer(sourceBuffer: SourceBuffer): void;
-}
-
-declare var MediaSource: {
-    prototype: MediaSource;
-    new(): MediaSource;
-    isTypeSupported(type: string): boolean;
-}
-
-interface MediaStream extends EventTarget {
-    readonly active: boolean;
-    readonly id: string;
-    onactive: (this: this, ev: Event) => any;
-    onaddtrack: (this: this, ev: TrackEvent) => any;
-    oninactive: (this: this, ev: Event) => any;
-    onremovetrack: (this: this, ev: TrackEvent) => any;
-    addTrack(track: MediaStreamTrack): void;
-    clone(): MediaStream;
-    getAudioTracks(): MediaStreamTrack[];
-    getTrackById(trackId: string): MediaStreamTrack | null;
-    getTracks(): MediaStreamTrack[];
-    getVideoTracks(): MediaStreamTrack[];
-    removeTrack(track: MediaStreamTrack): void;
-    stop(): void;
-    addEventListener(type: "active", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "addtrack", listener: (this: this, ev: TrackEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "inactive", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "removetrack", listener: (this: this, ev: TrackEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var MediaStream: {
-    prototype: MediaStream;
-    new(streamOrTracks?: MediaStream | MediaStreamTrack[]): MediaStream;
-}
-
-interface MediaStreamAudioSourceNode extends AudioNode {
-}
-
-declare var MediaStreamAudioSourceNode: {
-    prototype: MediaStreamAudioSourceNode;
-    new(): MediaStreamAudioSourceNode;
-}
-
-interface MediaStreamError {
-    readonly constraintName: string | null;
-    readonly message: string | null;
-    readonly name: string;
-}
-
-declare var MediaStreamError: {
-    prototype: MediaStreamError;
-    new(): MediaStreamError;
-}
-
-interface MediaStreamErrorEvent extends Event {
-    readonly error: MediaStreamError | null;
-}
-
-declare var MediaStreamErrorEvent: {
-    prototype: MediaStreamErrorEvent;
-    new(type: string, eventInitDict?: MediaStreamErrorEventInit): MediaStreamErrorEvent;
-}
-
-interface MediaStreamTrack extends EventTarget {
-    enabled: boolean;
-    readonly id: string;
-    readonly kind: string;
-    readonly label: string;
-    readonly muted: boolean;
-    onended: (this: this, ev: MediaStreamErrorEvent) => any;
-    onmute: (this: this, ev: Event) => any;
-    onoverconstrained: (this: this, ev: MediaStreamErrorEvent) => any;
-    onunmute: (this: this, ev: Event) => any;
-    readonly readonly: boolean;
-    readonly readyState: string;
-    readonly remote: boolean;
-    applyConstraints(constraints: MediaTrackConstraints): PromiseLike<void>;
-    clone(): MediaStreamTrack;
-    getCapabilities(): MediaTrackCapabilities;
-    getConstraints(): MediaTrackConstraints;
-    getSettings(): MediaTrackSettings;
-    stop(): void;
-    addEventListener(type: "ended", listener: (this: this, ev: MediaStreamErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mute", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "overconstrained", listener: (this: this, ev: MediaStreamErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "unmute", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var MediaStreamTrack: {
-    prototype: MediaStreamTrack;
-    new(): MediaStreamTrack;
-}
-
-interface MediaStreamTrackEvent extends Event {
-    readonly track: MediaStreamTrack;
-}
-
-declare var MediaStreamTrackEvent: {
-    prototype: MediaStreamTrackEvent;
-    new(type: string, eventInitDict?: MediaStreamTrackEventInit): MediaStreamTrackEvent;
-}
-
-interface MessageChannel {
-    readonly port1: MessagePort;
-    readonly port2: MessagePort;
-}
-
-declare var MessageChannel: {
-    prototype: MessageChannel;
-    new(): MessageChannel;
-}
-
-interface MessageEvent extends Event {
-    readonly data: any;
-    readonly origin: string;
-    readonly ports: any;
-    readonly source: Window;
-    initMessageEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, dataArg: any, originArg: string, lastEventIdArg: string, sourceArg: Window): void;
-}
-
-declare var MessageEvent: {
-    prototype: MessageEvent;
-    new(type: string, eventInitDict?: MessageEventInit): MessageEvent;
-}
-
-interface MessagePort extends EventTarget {
-    onmessage: (this: this, ev: MessageEvent) => any;
-    close(): void;
-    postMessage(message?: any, ports?: any): void;
-    start(): void;
-    addEventListener(type: "message", listener: (this: this, ev: MessageEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var MessagePort: {
-    prototype: MessagePort;
-    new(): MessagePort;
-}
-
-interface MimeType {
-    readonly description: string;
-    readonly enabledPlugin: Plugin;
-    readonly suffixes: string;
-    readonly type: string;
-}
-
-declare var MimeType: {
-    prototype: MimeType;
-    new(): MimeType;
-}
-
-interface MimeTypeArray {
-    readonly length: number;
-    item(index: number): Plugin;
-    namedItem(type: string): Plugin;
-    [index: number]: Plugin;
-}
-
-declare var MimeTypeArray: {
-    prototype: MimeTypeArray;
-    new(): MimeTypeArray;
-}
-
-interface MouseEvent extends UIEvent {
-    readonly altKey: boolean;
-    readonly button: number;
-    readonly buttons: number;
-    readonly clientX: number;
-    readonly clientY: number;
-    readonly ctrlKey: boolean;
-    readonly fromElement: Element;
-    readonly layerX: number;
-    readonly layerY: number;
-    readonly metaKey: boolean;
-    readonly movementX: number;
-    readonly movementY: number;
-    readonly offsetX: number;
-    readonly offsetY: number;
-    readonly pageX: number;
-    readonly pageY: number;
-    readonly relatedTarget: EventTarget;
-    readonly screenX: number;
-    readonly screenY: number;
-    readonly shiftKey: boolean;
-    readonly toElement: Element;
-    readonly which: number;
-    readonly x: number;
-    readonly y: number;
-    getModifierState(keyArg: string): boolean;
-    initMouseEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, ctrlKeyArg: boolean, altKeyArg: boolean, shiftKeyArg: boolean, metaKeyArg: boolean, buttonArg: number, relatedTargetArg: EventTarget): void;
-}
-
-declare var MouseEvent: {
-    prototype: MouseEvent;
-    new(typeArg: string, eventInitDict?: MouseEventInit): MouseEvent;
-}
-
-interface MutationEvent extends Event {
-    readonly attrChange: number;
-    readonly attrName: string;
-    readonly newValue: string;
-    readonly prevValue: string;
-    readonly relatedNode: Node;
-    initMutationEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, relatedNodeArg: Node, prevValueArg: string, newValueArg: string, attrNameArg: string, attrChangeArg: number): void;
-    readonly ADDITION: number;
-    readonly MODIFICATION: number;
-    readonly REMOVAL: number;
-}
-
-declare var MutationEvent: {
-    prototype: MutationEvent;
-    new(): MutationEvent;
-    readonly ADDITION: number;
-    readonly MODIFICATION: number;
-    readonly REMOVAL: number;
-}
-
-interface MutationObserver {
-    disconnect(): void;
-    observe(target: Node, options: MutationObserverInit): void;
-    takeRecords(): MutationRecord[];
-}
-
-declare var MutationObserver: {
-    prototype: MutationObserver;
-    new(callback: MutationCallback): MutationObserver;
-}
-
-interface MutationRecord {
-    readonly addedNodes: NodeList;
-    readonly attributeName: string | null;
-    readonly attributeNamespace: string | null;
-    readonly nextSibling: Node | null;
-    readonly oldValue: string | null;
-    readonly previousSibling: Node | null;
-    readonly removedNodes: NodeList;
-    readonly target: Node;
-    readonly type: string;
-}
-
-declare var MutationRecord: {
-    prototype: MutationRecord;
-    new(): MutationRecord;
-}
-
-interface NamedNodeMap {
-    readonly length: number;
-    getNamedItem(name: string): Attr;
-    getNamedItemNS(namespaceURI: string | null, localName: string | null): Attr;
-    item(index: number): Attr;
-    removeNamedItem(name: string): Attr;
-    removeNamedItemNS(namespaceURI: string | null, localName: string | null): Attr;
-    setNamedItem(arg: Attr): Attr;
-    setNamedItemNS(arg: Attr): Attr;
-    [index: number]: Attr;
-}
-
-declare var NamedNodeMap: {
-    prototype: NamedNodeMap;
-    new(): NamedNodeMap;
-}
-
-interface NavigationCompletedEvent extends NavigationEvent {
-    readonly isSuccess: boolean;
-    readonly webErrorStatus: number;
-}
-
-declare var NavigationCompletedEvent: {
-    prototype: NavigationCompletedEvent;
-    new(): NavigationCompletedEvent;
-}
-
-interface NavigationEvent extends Event {
-    readonly uri: string;
-}
-
-declare var NavigationEvent: {
-    prototype: NavigationEvent;
-    new(): NavigationEvent;
-}
-
-interface NavigationEventWithReferrer extends NavigationEvent {
-    readonly referer: string;
-}
-
-declare var NavigationEventWithReferrer: {
-    prototype: NavigationEventWithReferrer;
-    new(): NavigationEventWithReferrer;
-}
-
-interface Navigator extends Object, NavigatorID, NavigatorOnLine, NavigatorContentUtils, NavigatorStorageUtils, NavigatorGeolocation, MSNavigatorDoNotTrack, MSFileSaver, NavigatorUserMedia {
-    readonly appCodeName: string;
-    readonly cookieEnabled: boolean;
-    readonly language: string;
-    readonly maxTouchPoints: number;
-    readonly mimeTypes: MimeTypeArray;
-    readonly msManipulationViewsEnabled: boolean;
-    readonly msMaxTouchPoints: number;
-    readonly msPointerEnabled: boolean;
-    readonly plugins: PluginArray;
-    readonly pointerEnabled: boolean;
-    readonly webdriver: boolean;
-    getGamepads(): Gamepad[];
-    javaEnabled(): boolean;
-    msLaunchUri(uri: string, successCallback?: MSLaunchUriCallback, noHandlerCallback?: MSLaunchUriCallback): void;
-    requestMediaKeySystemAccess(keySystem: string, supportedConfigurations: MediaKeySystemConfiguration[]): PromiseLike<MediaKeySystemAccess>;
-    vibrate(pattern: number | number[]): boolean;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var Navigator: {
-    prototype: Navigator;
-    new(): Navigator;
-}
-
-interface Node extends EventTarget {
-    readonly attributes: NamedNodeMap;
-    readonly baseURI: string | null;
-    readonly childNodes: NodeList;
-    readonly firstChild: Node;
-    readonly lastChild: Node;
-    readonly localName: string | null;
-    readonly namespaceURI: string | null;
-    readonly nextSibling: Node;
-    readonly nodeName: string;
-    readonly nodeType: number;
-    nodeValue: string | null;
-    readonly ownerDocument: Document;
-    readonly parentElement: HTMLElement;
-    readonly parentNode: Node;
-    readonly previousSibling: Node;
-    textContent: string | null;
-    appendChild(newChild: Node): Node;
-    cloneNode(deep?: boolean): Node;
-    compareDocumentPosition(other: Node): number;
-    contains(child: Node): boolean;
-    hasAttributes(): boolean;
-    hasChildNodes(): boolean;
-    insertBefore(newChild: Node, refChild: Node | null): Node;
-    isDefaultNamespace(namespaceURI: string | null): boolean;
-    isEqualNode(arg: Node): boolean;
-    isSameNode(other: Node): boolean;
-    lookupNamespaceURI(prefix: string | null): string | null;
-    lookupPrefix(namespaceURI: string | null): string | null;
-    normalize(): void;
-    removeChild(oldChild: Node): Node;
-    replaceChild(newChild: Node, oldChild: Node): Node;
-    readonly ATTRIBUTE_NODE: number;
-    readonly CDATA_SECTION_NODE: number;
-    readonly COMMENT_NODE: number;
-    readonly DOCUMENT_FRAGMENT_NODE: number;
-    readonly DOCUMENT_NODE: number;
-    readonly DOCUMENT_POSITION_CONTAINED_BY: number;
-    readonly DOCUMENT_POSITION_CONTAINS: number;
-    readonly DOCUMENT_POSITION_DISCONNECTED: number;
-    readonly DOCUMENT_POSITION_FOLLOWING: number;
-    readonly DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC: number;
-    readonly DOCUMENT_POSITION_PRECEDING: number;
-    readonly DOCUMENT_TYPE_NODE: number;
-    readonly ELEMENT_NODE: number;
-    readonly ENTITY_NODE: number;
-    readonly ENTITY_REFERENCE_NODE: number;
-    readonly NOTATION_NODE: number;
-    readonly PROCESSING_INSTRUCTION_NODE: number;
-    readonly TEXT_NODE: number;
-}
-
-declare var Node: {
-    prototype: Node;
-    new(): Node;
-    readonly ATTRIBUTE_NODE: number;
-    readonly CDATA_SECTION_NODE: number;
-    readonly COMMENT_NODE: number;
-    readonly DOCUMENT_FRAGMENT_NODE: number;
-    readonly DOCUMENT_NODE: number;
-    readonly DOCUMENT_POSITION_CONTAINED_BY: number;
-    readonly DOCUMENT_POSITION_CONTAINS: number;
-    readonly DOCUMENT_POSITION_DISCONNECTED: number;
-    readonly DOCUMENT_POSITION_FOLLOWING: number;
-    readonly DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC: number;
-    readonly DOCUMENT_POSITION_PRECEDING: number;
-    readonly DOCUMENT_TYPE_NODE: number;
-    readonly ELEMENT_NODE: number;
-    readonly ENTITY_NODE: number;
-    readonly ENTITY_REFERENCE_NODE: number;
-    readonly NOTATION_NODE: number;
-    readonly PROCESSING_INSTRUCTION_NODE: number;
-    readonly TEXT_NODE: number;
-}
-
-interface NodeFilter {
-    acceptNode(n: Node): number;
-}
-
-declare var NodeFilter: {
-    readonly FILTER_ACCEPT: number;
-    readonly FILTER_REJECT: number;
-    readonly FILTER_SKIP: number;
-    readonly SHOW_ALL: number;
-    readonly SHOW_ATTRIBUTE: number;
-    readonly SHOW_CDATA_SECTION: number;
-    readonly SHOW_COMMENT: number;
-    readonly SHOW_DOCUMENT: number;
-    readonly SHOW_DOCUMENT_FRAGMENT: number;
-    readonly SHOW_DOCUMENT_TYPE: number;
-    readonly SHOW_ELEMENT: number;
-    readonly SHOW_ENTITY: number;
-    readonly SHOW_ENTITY_REFERENCE: number;
-    readonly SHOW_NOTATION: number;
-    readonly SHOW_PROCESSING_INSTRUCTION: number;
-    readonly SHOW_TEXT: number;
-}
-
-interface NodeIterator {
-    readonly expandEntityReferences: boolean;
-    readonly filter: NodeFilter;
-    readonly root: Node;
-    readonly whatToShow: number;
-    detach(): void;
-    nextNode(): Node;
-    previousNode(): Node;
-}
-
-declare var NodeIterator: {
-    prototype: NodeIterator;
-    new(): NodeIterator;
-}
-
-interface NodeList {
-    readonly length: number;
-    item(index: number): Node;
-    [index: number]: Node;
-}
-
-declare var NodeList: {
-    prototype: NodeList;
-    new(): NodeList;
-}
-
-interface OES_element_index_uint {
-}
-
-declare var OES_element_index_uint: {
-    prototype: OES_element_index_uint;
-    new(): OES_element_index_uint;
-}
-
-interface OES_standard_derivatives {
-    readonly FRAGMENT_SHADER_DERIVATIVE_HINT_OES: number;
-}
-
-declare var OES_standard_derivatives: {
-    prototype: OES_standard_derivatives;
-    new(): OES_standard_derivatives;
-    readonly FRAGMENT_SHADER_DERIVATIVE_HINT_OES: number;
-}
-
-interface OES_texture_float {
-}
-
-declare var OES_texture_float: {
-    prototype: OES_texture_float;
-    new(): OES_texture_float;
-}
-
-interface OES_texture_float_linear {
-}
-
-declare var OES_texture_float_linear: {
-    prototype: OES_texture_float_linear;
-    new(): OES_texture_float_linear;
-}
-
-interface OfflineAudioCompletionEvent extends Event {
-    readonly renderedBuffer: AudioBuffer;
-}
-
-declare var OfflineAudioCompletionEvent: {
-    prototype: OfflineAudioCompletionEvent;
-    new(): OfflineAudioCompletionEvent;
-}
-
-interface OfflineAudioContext extends AudioContext {
-    oncomplete: (this: this, ev: Event) => any;
-    startRendering(): PromiseLike<AudioBuffer>;
-    addEventListener(type: "complete", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var OfflineAudioContext: {
-    prototype: OfflineAudioContext;
-    new(numberOfChannels: number, length: number, sampleRate: number): OfflineAudioContext;
-}
-
-interface OscillatorNode extends AudioNode {
-    readonly detune: AudioParam;
-    readonly frequency: AudioParam;
-    onended: (this: this, ev: MediaStreamErrorEvent) => any;
-    type: string;
-    setPeriodicWave(periodicWave: PeriodicWave): void;
-    start(when?: number): void;
-    stop(when?: number): void;
-    addEventListener(type: "ended", listener: (this: this, ev: MediaStreamErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var OscillatorNode: {
-    prototype: OscillatorNode;
-    new(): OscillatorNode;
-}
-
-interface OverflowEvent extends UIEvent {
-    readonly horizontalOverflow: boolean;
-    readonly orient: number;
-    readonly verticalOverflow: boolean;
-    readonly BOTH: number;
-    readonly HORIZONTAL: number;
-    readonly VERTICAL: number;
-}
-
-declare var OverflowEvent: {
-    prototype: OverflowEvent;
-    new(): OverflowEvent;
-    readonly BOTH: number;
-    readonly HORIZONTAL: number;
-    readonly VERTICAL: number;
-}
-
-interface PageTransitionEvent extends Event {
-    readonly persisted: boolean;
-}
-
-declare var PageTransitionEvent: {
-    prototype: PageTransitionEvent;
-    new(): PageTransitionEvent;
-}
-
-interface PannerNode extends AudioNode {
-    coneInnerAngle: number;
-    coneOuterAngle: number;
-    coneOuterGain: number;
-    distanceModel: string;
-    maxDistance: number;
-    panningModel: string;
-    refDistance: number;
-    rolloffFactor: number;
-    setOrientation(x: number, y: number, z: number): void;
-    setPosition(x: number, y: number, z: number): void;
-    setVelocity(x: number, y: number, z: number): void;
-}
-
-declare var PannerNode: {
-    prototype: PannerNode;
-    new(): PannerNode;
-}
-
-interface PerfWidgetExternal {
-    readonly activeNetworkRequestCount: number;
-    readonly averageFrameTime: number;
-    readonly averagePaintTime: number;
-    readonly extraInformationEnabled: boolean;
-    readonly independentRenderingEnabled: boolean;
-    readonly irDisablingContentString: string;
-    readonly irStatusAvailable: boolean;
-    readonly maxCpuSpeed: number;
-    readonly paintRequestsPerSecond: number;
-    readonly performanceCounter: number;
-    readonly performanceCounterFrequency: number;
-    addEventListener(eventType: string, callback: Function): void;
-    getMemoryUsage(): number;
-    getProcessCpuUsage(): number;
-    getRecentCpuUsage(last: number | null): any;
-    getRecentFrames(last: number | null): any;
-    getRecentMemoryUsage(last: number | null): any;
-    getRecentPaintRequests(last: number | null): any;
-    removeEventListener(eventType: string, callback: Function): void;
-    repositionWindow(x: number, y: number): void;
-    resizeWindow(width: number, height: number): void;
-}
-
-declare var PerfWidgetExternal: {
-    prototype: PerfWidgetExternal;
-    new(): PerfWidgetExternal;
-}
-
-interface Performance {
-    readonly navigation: PerformanceNavigation;
-    readonly timing: PerformanceTiming;
-    clearMarks(markName?: string): void;
-    clearMeasures(measureName?: string): void;
-    clearResourceTimings(): void;
-    getEntries(): any;
-    getEntriesByName(name: string, entryType?: string): any;
-    getEntriesByType(entryType: string): any;
-    getMarks(markName?: string): any;
-    getMeasures(measureName?: string): any;
-    mark(markName: string): void;
-    measure(measureName: string, startMarkName?: string, endMarkName?: string): void;
-    now(): number;
-    setResourceTimingBufferSize(maxSize: number): void;
-    toJSON(): any;
-}
-
-declare var Performance: {
-    prototype: Performance;
-    new(): Performance;
-}
-
-interface PerformanceEntry {
-    readonly duration: number;
-    readonly entryType: string;
-    readonly name: string;
-    readonly startTime: number;
-}
-
-declare var PerformanceEntry: {
-    prototype: PerformanceEntry;
-    new(): PerformanceEntry;
-}
-
-interface PerformanceMark extends PerformanceEntry {
-}
-
-declare var PerformanceMark: {
-    prototype: PerformanceMark;
-    new(): PerformanceMark;
-}
-
-interface PerformanceMeasure extends PerformanceEntry {
-}
-
-declare var PerformanceMeasure: {
-    prototype: PerformanceMeasure;
-    new(): PerformanceMeasure;
-}
-
-interface PerformanceNavigation {
-    readonly redirectCount: number;
-    readonly type: number;
-    toJSON(): any;
-    readonly TYPE_BACK_FORWARD: number;
-    readonly TYPE_NAVIGATE: number;
-    readonly TYPE_RELOAD: number;
-    readonly TYPE_RESERVED: number;
-}
-
-declare var PerformanceNavigation: {
-    prototype: PerformanceNavigation;
-    new(): PerformanceNavigation;
-    readonly TYPE_BACK_FORWARD: number;
-    readonly TYPE_NAVIGATE: number;
-    readonly TYPE_RELOAD: number;
-    readonly TYPE_RESERVED: number;
-}
-
-interface PerformanceNavigationTiming extends PerformanceEntry {
-    readonly connectEnd: number;
-    readonly connectStart: number;
-    readonly domComplete: number;
-    readonly domContentLoadedEventEnd: number;
-    readonly domContentLoadedEventStart: number;
-    readonly domInteractive: number;
-    readonly domLoading: number;
-    readonly domainLookupEnd: number;
-    readonly domainLookupStart: number;
-    readonly fetchStart: number;
-    readonly loadEventEnd: number;
-    readonly loadEventStart: number;
-    readonly navigationStart: number;
-    readonly redirectCount: number;
-    readonly redirectEnd: number;
-    readonly redirectStart: number;
-    readonly requestStart: number;
-    readonly responseEnd: number;
-    readonly responseStart: number;
-    readonly type: string;
-    readonly unloadEventEnd: number;
-    readonly unloadEventStart: number;
-}
-
-declare var PerformanceNavigationTiming: {
-    prototype: PerformanceNavigationTiming;
-    new(): PerformanceNavigationTiming;
-}
-
-interface PerformanceResourceTiming extends PerformanceEntry {
-    readonly connectEnd: number;
-    readonly connectStart: number;
-    readonly domainLookupEnd: number;
-    readonly domainLookupStart: number;
-    readonly fetchStart: number;
-    readonly initiatorType: string;
-    readonly redirectEnd: number;
-    readonly redirectStart: number;
-    readonly requestStart: number;
-    readonly responseEnd: number;
-    readonly responseStart: number;
-}
-
-declare var PerformanceResourceTiming: {
-    prototype: PerformanceResourceTiming;
-    new(): PerformanceResourceTiming;
-}
-
-interface PerformanceTiming {
-    readonly connectEnd: number;
-    readonly connectStart: number;
-    readonly domComplete: number;
-    readonly domContentLoadedEventEnd: number;
-    readonly domContentLoadedEventStart: number;
-    readonly domInteractive: number;
-    readonly domLoading: number;
-    readonly domainLookupEnd: number;
-    readonly domainLookupStart: number;
-    readonly fetchStart: number;
-    readonly loadEventEnd: number;
-    readonly loadEventStart: number;
-    readonly msFirstPaint: number;
-    readonly navigationStart: number;
-    readonly redirectEnd: number;
-    readonly redirectStart: number;
-    readonly requestStart: number;
-    readonly responseEnd: number;
-    readonly responseStart: number;
-    readonly unloadEventEnd: number;
-    readonly unloadEventStart: number;
-    readonly secureConnectionStart: number;
-    toJSON(): any;
-}
-
-declare var PerformanceTiming: {
-    prototype: PerformanceTiming;
-    new(): PerformanceTiming;
-}
-
-interface PeriodicWave {
-}
-
-declare var PeriodicWave: {
-    prototype: PeriodicWave;
-    new(): PeriodicWave;
-}
-
-interface PermissionRequest extends DeferredPermissionRequest {
-    readonly state: string;
-    defer(): void;
-}
-
-declare var PermissionRequest: {
-    prototype: PermissionRequest;
-    new(): PermissionRequest;
-}
-
-interface PermissionRequestedEvent extends Event {
-    readonly permissionRequest: PermissionRequest;
-}
-
-declare var PermissionRequestedEvent: {
-    prototype: PermissionRequestedEvent;
-    new(): PermissionRequestedEvent;
-}
-
-interface Plugin {
-    readonly description: string;
-    readonly filename: string;
-    readonly length: number;
-    readonly name: string;
-    readonly version: string;
-    item(index: number): MimeType;
-    namedItem(type: string): MimeType;
-    [index: number]: MimeType;
-}
-
-declare var Plugin: {
-    prototype: Plugin;
-    new(): Plugin;
-}
-
-interface PluginArray {
-    readonly length: number;
-    item(index: number): Plugin;
-    namedItem(name: string): Plugin;
-    refresh(reload?: boolean): void;
-    [index: number]: Plugin;
-}
-
-declare var PluginArray: {
-    prototype: PluginArray;
-    new(): PluginArray;
-}
-
-interface PointerEvent extends MouseEvent {
-    readonly currentPoint: any;
-    readonly height: number;
-    readonly hwTimestamp: number;
-    readonly intermediatePoints: any;
-    readonly isPrimary: boolean;
-    readonly pointerId: number;
-    readonly pointerType: any;
-    readonly pressure: number;
-    readonly rotation: number;
-    readonly tiltX: number;
-    readonly tiltY: number;
-    readonly width: number;
-    getCurrentPoint(element: Element): void;
-    getIntermediatePoints(element: Element): void;
-    initPointerEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, ctrlKeyArg: boolean, altKeyArg: boolean, shiftKeyArg: boolean, metaKeyArg: boolean, buttonArg: number, relatedTargetArg: EventTarget, offsetXArg: number, offsetYArg: number, widthArg: number, heightArg: number, pressure: number, rotation: number, tiltX: number, tiltY: number, pointerIdArg: number, pointerType: any, hwTimestampArg: number, isPrimary: boolean): void;
-}
-
-declare var PointerEvent: {
-    prototype: PointerEvent;
-    new(typeArg: string, eventInitDict?: PointerEventInit): PointerEvent;
-}
-
-interface PopStateEvent extends Event {
-    readonly state: any;
-    initPopStateEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, stateArg: any): void;
-}
-
-declare var PopStateEvent: {
-    prototype: PopStateEvent;
-    new(): PopStateEvent;
-}
-
-interface Position {
-    readonly coords: Coordinates;
-    readonly timestamp: number;
-}
-
-declare var Position: {
-    prototype: Position;
-    new(): Position;
-}
-
-interface PositionError {
-    readonly code: number;
-    readonly message: string;
-    toString(): string;
-    readonly PERMISSION_DENIED: number;
-    readonly POSITION_UNAVAILABLE: number;
-    readonly TIMEOUT: number;
-}
-
-declare var PositionError: {
-    prototype: PositionError;
-    new(): PositionError;
-    readonly PERMISSION_DENIED: number;
-    readonly POSITION_UNAVAILABLE: number;
-    readonly TIMEOUT: number;
-}
-
-interface ProcessingInstruction extends CharacterData {
-    readonly target: string;
-}
-
-declare var ProcessingInstruction: {
-    prototype: ProcessingInstruction;
-    new(): ProcessingInstruction;
-}
-
-interface ProgressEvent extends Event {
-    readonly lengthComputable: boolean;
-    readonly loaded: number;
-    readonly total: number;
-    initProgressEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, lengthComputableArg: boolean, loadedArg: number, totalArg: number): void;
-}
-
-declare var ProgressEvent: {
-    prototype: ProgressEvent;
-    new(type: string, eventInitDict?: ProgressEventInit): ProgressEvent;
-}
-
-interface RTCDTMFToneChangeEvent extends Event {
-    readonly tone: string;
-}
-
-declare var RTCDTMFToneChangeEvent: {
-    prototype: RTCDTMFToneChangeEvent;
-    new(type: string, eventInitDict: RTCDTMFToneChangeEventInit): RTCDTMFToneChangeEvent;
-}
-
-interface RTCDtlsTransport extends RTCStatsProvider {
-    ondtlsstatechange: ((this: this, ev: RTCDtlsTransportStateChangedEvent) => any) | null;
-    onerror: ((this: this, ev: ErrorEvent) => any) | null;
-    readonly state: string;
-    readonly transport: RTCIceTransport;
-    getLocalParameters(): RTCDtlsParameters;
-    getRemoteCertificates(): ArrayBuffer[];
-    getRemoteParameters(): RTCDtlsParameters | null;
-    start(remoteParameters: RTCDtlsParameters): void;
-    stop(): void;
-    addEventListener(type: "dtlsstatechange", listener: (this: this, ev: RTCDtlsTransportStateChangedEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var RTCDtlsTransport: {
-    prototype: RTCDtlsTransport;
-    new(transport: RTCIceTransport): RTCDtlsTransport;
-}
-
-interface RTCDtlsTransportStateChangedEvent extends Event {
-    readonly state: string;
-}
-
-declare var RTCDtlsTransportStateChangedEvent: {
-    prototype: RTCDtlsTransportStateChangedEvent;
-    new(): RTCDtlsTransportStateChangedEvent;
-}
-
-interface RTCDtmfSender extends EventTarget {
-    readonly canInsertDTMF: boolean;
-    readonly duration: number;
-    readonly interToneGap: number;
-    ontonechange: (this: this, ev: RTCDTMFToneChangeEvent) => any;
-    readonly sender: RTCRtpSender;
-    readonly toneBuffer: string;
-    insertDTMF(tones: string, duration?: number, interToneGap?: number): void;
-    addEventListener(type: "tonechange", listener: (this: this, ev: RTCDTMFToneChangeEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var RTCDtmfSender: {
-    prototype: RTCDtmfSender;
-    new(sender: RTCRtpSender): RTCDtmfSender;
-}
-
-interface RTCIceCandidatePairChangedEvent extends Event {
-    readonly pair: RTCIceCandidatePair;
-}
-
-declare var RTCIceCandidatePairChangedEvent: {
-    prototype: RTCIceCandidatePairChangedEvent;
-    new(): RTCIceCandidatePairChangedEvent;
-}
-
-interface RTCIceGatherer extends RTCStatsProvider {
-    readonly component: string;
-    onerror: ((this: this, ev: ErrorEvent) => any) | null;
-    onlocalcandidate: ((this: this, ev: RTCIceGathererEvent) => any) | null;
-    createAssociatedGatherer(): RTCIceGatherer;
-    getLocalCandidates(): RTCIceCandidate[];
-    getLocalParameters(): RTCIceParameters;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "localcandidate", listener: (this: this, ev: RTCIceGathererEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var RTCIceGatherer: {
-    prototype: RTCIceGatherer;
-    new(options: RTCIceGatherOptions): RTCIceGatherer;
-}
-
-interface RTCIceGathererEvent extends Event {
-    readonly candidate: RTCIceCandidate | RTCIceCandidateComplete;
-}
-
-declare var RTCIceGathererEvent: {
-    prototype: RTCIceGathererEvent;
-    new(): RTCIceGathererEvent;
-}
-
-interface RTCIceTransport extends RTCStatsProvider {
-    readonly component: string;
-    readonly iceGatherer: RTCIceGatherer | null;
-    oncandidatepairchange: ((this: this, ev: RTCIceCandidatePairChangedEvent) => any) | null;
-    onicestatechange: ((this: this, ev: RTCIceTransportStateChangedEvent) => any) | null;
-    readonly role: string;
-    readonly state: string;
-    addRemoteCandidate(remoteCandidate: RTCIceCandidate | RTCIceCandidateComplete): void;
-    createAssociatedTransport(): RTCIceTransport;
-    getNominatedCandidatePair(): RTCIceCandidatePair | null;
-    getRemoteCandidates(): RTCIceCandidate[];
-    getRemoteParameters(): RTCIceParameters | null;
-    setRemoteCandidates(remoteCandidates: RTCIceCandidate[]): void;
-    start(gatherer: RTCIceGatherer, remoteParameters: RTCIceParameters, role?: string): void;
-    stop(): void;
-    addEventListener(type: "candidatepairchange", listener: (this: this, ev: RTCIceCandidatePairChangedEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "icestatechange", listener: (this: this, ev: RTCIceTransportStateChangedEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var RTCIceTransport: {
-    prototype: RTCIceTransport;
-    new(): RTCIceTransport;
-}
-
-interface RTCIceTransportStateChangedEvent extends Event {
-    readonly state: string;
-}
-
-declare var RTCIceTransportStateChangedEvent: {
-    prototype: RTCIceTransportStateChangedEvent;
-    new(): RTCIceTransportStateChangedEvent;
-}
-
-interface RTCRtpReceiver extends RTCStatsProvider {
-    onerror: ((this: this, ev: ErrorEvent) => any) | null;
-    readonly rtcpTransport: RTCDtlsTransport;
-    readonly track: MediaStreamTrack | null;
-    readonly transport: RTCDtlsTransport | RTCSrtpSdesTransport;
-    getContributingSources(): RTCRtpContributingSource[];
-    receive(parameters: RTCRtpParameters): void;
-    requestSendCSRC(csrc: number): void;
-    setTransport(transport: RTCDtlsTransport | RTCSrtpSdesTransport, rtcpTransport?: RTCDtlsTransport): void;
-    stop(): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var RTCRtpReceiver: {
-    prototype: RTCRtpReceiver;
-    new(transport: RTCDtlsTransport | RTCSrtpSdesTransport, kind: string, rtcpTransport?: RTCDtlsTransport): RTCRtpReceiver;
-    getCapabilities(kind?: string): RTCRtpCapabilities;
-}
-
-interface RTCRtpSender extends RTCStatsProvider {
-    onerror: ((this: this, ev: ErrorEvent) => any) | null;
-    onssrcconflict: ((this: this, ev: RTCSsrcConflictEvent) => any) | null;
-    readonly rtcpTransport: RTCDtlsTransport;
-    readonly track: MediaStreamTrack;
-    readonly transport: RTCDtlsTransport | RTCSrtpSdesTransport;
-    send(parameters: RTCRtpParameters): void;
-    setTrack(track: MediaStreamTrack): void;
-    setTransport(transport: RTCDtlsTransport | RTCSrtpSdesTransport, rtcpTransport?: RTCDtlsTransport): void;
-    stop(): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ssrcconflict", listener: (this: this, ev: RTCSsrcConflictEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var RTCRtpSender: {
-    prototype: RTCRtpSender;
-    new(track: MediaStreamTrack, transport: RTCDtlsTransport | RTCSrtpSdesTransport, rtcpTransport?: RTCDtlsTransport): RTCRtpSender;
-    getCapabilities(kind?: string): RTCRtpCapabilities;
-}
-
-interface RTCSrtpSdesTransport extends EventTarget {
-    onerror: ((this: this, ev: ErrorEvent) => any) | null;
-    readonly transport: RTCIceTransport;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var RTCSrtpSdesTransport: {
-    prototype: RTCSrtpSdesTransport;
-    new(transport: RTCIceTransport, encryptParameters: RTCSrtpSdesParameters, decryptParameters: RTCSrtpSdesParameters): RTCSrtpSdesTransport;
-    getLocalParameters(): RTCSrtpSdesParameters[];
-}
-
-interface RTCSsrcConflictEvent extends Event {
-    readonly ssrc: number;
-}
-
-declare var RTCSsrcConflictEvent: {
-    prototype: RTCSsrcConflictEvent;
-    new(): RTCSsrcConflictEvent;
-}
-
-interface RTCStatsProvider extends EventTarget {
-    getStats(): PromiseLike<RTCStatsReport>;
-    msGetStats(): PromiseLike<RTCStatsReport>;
-}
-
-declare var RTCStatsProvider: {
-    prototype: RTCStatsProvider;
-    new(): RTCStatsProvider;
-}
-
-interface Range {
-    readonly collapsed: boolean;
-    readonly commonAncestorContainer: Node;
-    readonly endContainer: Node;
-    readonly endOffset: number;
-    readonly startContainer: Node;
-    readonly startOffset: number;
-    cloneContents(): DocumentFragment;
-    cloneRange(): Range;
-    collapse(toStart: boolean): void;
-    compareBoundaryPoints(how: number, sourceRange: Range): number;
-    createContextualFragment(fragment: string): DocumentFragment;
-    deleteContents(): void;
-    detach(): void;
-    expand(Unit: string): boolean;
-    extractContents(): DocumentFragment;
-    getBoundingClientRect(): ClientRect;
-    getClientRects(): ClientRectList;
-    insertNode(newNode: Node): void;
-    selectNode(refNode: Node): void;
-    selectNodeContents(refNode: Node): void;
-    setEnd(refNode: Node, offset: number): void;
-    setEndAfter(refNode: Node): void;
-    setEndBefore(refNode: Node): void;
-    setStart(refNode: Node, offset: number): void;
-    setStartAfter(refNode: Node): void;
-    setStartBefore(refNode: Node): void;
-    surroundContents(newParent: Node): void;
-    toString(): string;
-    readonly END_TO_END: number;
-    readonly END_TO_START: number;
-    readonly START_TO_END: number;
-    readonly START_TO_START: number;
-}
-
-declare var Range: {
-    prototype: Range;
-    new(): Range;
-    readonly END_TO_END: number;
-    readonly END_TO_START: number;
-    readonly START_TO_END: number;
-    readonly START_TO_START: number;
-}
-
-interface SVGAElement extends SVGElement, SVGStylable, SVGTransformable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGURIReference {
-    readonly target: SVGAnimatedString;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGAElement: {
-    prototype: SVGAElement;
-    new(): SVGAElement;
-}
-
-interface SVGAngle {
-    readonly unitType: number;
-    value: number;
-    valueAsString: string;
-    valueInSpecifiedUnits: number;
-    convertToSpecifiedUnits(unitType: number): void;
-    newValueSpecifiedUnits(unitType: number, valueInSpecifiedUnits: number): void;
-    readonly SVG_ANGLETYPE_DEG: number;
-    readonly SVG_ANGLETYPE_GRAD: number;
-    readonly SVG_ANGLETYPE_RAD: number;
-    readonly SVG_ANGLETYPE_UNKNOWN: number;
-    readonly SVG_ANGLETYPE_UNSPECIFIED: number;
-}
-
-declare var SVGAngle: {
-    prototype: SVGAngle;
-    new(): SVGAngle;
-    readonly SVG_ANGLETYPE_DEG: number;
-    readonly SVG_ANGLETYPE_GRAD: number;
-    readonly SVG_ANGLETYPE_RAD: number;
-    readonly SVG_ANGLETYPE_UNKNOWN: number;
-    readonly SVG_ANGLETYPE_UNSPECIFIED: number;
-}
-
-interface SVGAnimatedAngle {
-    readonly animVal: SVGAngle;
-    readonly baseVal: SVGAngle;
-}
-
-declare var SVGAnimatedAngle: {
-    prototype: SVGAnimatedAngle;
-    new(): SVGAnimatedAngle;
-}
-
-interface SVGAnimatedBoolean {
-    readonly animVal: boolean;
-    baseVal: boolean;
-}
-
-declare var SVGAnimatedBoolean: {
-    prototype: SVGAnimatedBoolean;
-    new(): SVGAnimatedBoolean;
-}
-
-interface SVGAnimatedEnumeration {
-    readonly animVal: number;
-    baseVal: number;
-}
-
-declare var SVGAnimatedEnumeration: {
-    prototype: SVGAnimatedEnumeration;
-    new(): SVGAnimatedEnumeration;
-}
-
-interface SVGAnimatedInteger {
-    readonly animVal: number;
-    baseVal: number;
-}
-
-declare var SVGAnimatedInteger: {
-    prototype: SVGAnimatedInteger;
-    new(): SVGAnimatedInteger;
-}
-
-interface SVGAnimatedLength {
-    readonly animVal: SVGLength;
-    readonly baseVal: SVGLength;
-}
-
-declare var SVGAnimatedLength: {
-    prototype: SVGAnimatedLength;
-    new(): SVGAnimatedLength;
-}
-
-interface SVGAnimatedLengthList {
-    readonly animVal: SVGLengthList;
-    readonly baseVal: SVGLengthList;
-}
-
-declare var SVGAnimatedLengthList: {
-    prototype: SVGAnimatedLengthList;
-    new(): SVGAnimatedLengthList;
-}
-
-interface SVGAnimatedNumber {
-    readonly animVal: number;
-    baseVal: number;
-}
-
-declare var SVGAnimatedNumber: {
-    prototype: SVGAnimatedNumber;
-    new(): SVGAnimatedNumber;
-}
-
-interface SVGAnimatedNumberList {
-    readonly animVal: SVGNumberList;
-    readonly baseVal: SVGNumberList;
-}
-
-declare var SVGAnimatedNumberList: {
-    prototype: SVGAnimatedNumberList;
-    new(): SVGAnimatedNumberList;
-}
-
-interface SVGAnimatedPreserveAspectRatio {
-    readonly animVal: SVGPreserveAspectRatio;
-    readonly baseVal: SVGPreserveAspectRatio;
-}
-
-declare var SVGAnimatedPreserveAspectRatio: {
-    prototype: SVGAnimatedPreserveAspectRatio;
-    new(): SVGAnimatedPreserveAspectRatio;
-}
-
-interface SVGAnimatedRect {
-    readonly animVal: SVGRect;
-    readonly baseVal: SVGRect;
-}
-
-declare var SVGAnimatedRect: {
-    prototype: SVGAnimatedRect;
-    new(): SVGAnimatedRect;
-}
-
-interface SVGAnimatedString {
-    readonly animVal: string;
-    baseVal: string;
-}
-
-declare var SVGAnimatedString: {
-    prototype: SVGAnimatedString;
-    new(): SVGAnimatedString;
-}
-
-interface SVGAnimatedTransformList {
-    readonly animVal: SVGTransformList;
-    readonly baseVal: SVGTransformList;
-}
-
-declare var SVGAnimatedTransformList: {
-    prototype: SVGAnimatedTransformList;
-    new(): SVGAnimatedTransformList;
-}
-
-interface SVGCircleElement extends SVGElement, SVGStylable, SVGTransformable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired {
-    readonly cx: SVGAnimatedLength;
-    readonly cy: SVGAnimatedLength;
-    readonly r: SVGAnimatedLength;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGCircleElement: {
-    prototype: SVGCircleElement;
-    new(): SVGCircleElement;
-}
-
-interface SVGClipPathElement extends SVGElement, SVGStylable, SVGTransformable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGUnitTypes {
-    readonly clipPathUnits: SVGAnimatedEnumeration;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGClipPathElement: {
-    prototype: SVGClipPathElement;
-    new(): SVGClipPathElement;
-}
-
-interface SVGComponentTransferFunctionElement extends SVGElement {
-    readonly amplitude: SVGAnimatedNumber;
-    readonly exponent: SVGAnimatedNumber;
-    readonly intercept: SVGAnimatedNumber;
-    readonly offset: SVGAnimatedNumber;
-    readonly slope: SVGAnimatedNumber;
-    readonly tableValues: SVGAnimatedNumberList;
-    readonly type: SVGAnimatedEnumeration;
-    readonly SVG_FECOMPONENTTRANSFER_TYPE_DISCRETE: number;
-    readonly SVG_FECOMPONENTTRANSFER_TYPE_GAMMA: number;
-    readonly SVG_FECOMPONENTTRANSFER_TYPE_IDENTITY: number;
-    readonly SVG_FECOMPONENTTRANSFER_TYPE_LINEAR: number;
-    readonly SVG_FECOMPONENTTRANSFER_TYPE_TABLE: number;
-    readonly SVG_FECOMPONENTTRANSFER_TYPE_UNKNOWN: number;
-}
-
-declare var SVGComponentTransferFunctionElement: {
-    prototype: SVGComponentTransferFunctionElement;
-    new(): SVGComponentTransferFunctionElement;
-    readonly SVG_FECOMPONENTTRANSFER_TYPE_DISCRETE: number;
-    readonly SVG_FECOMPONENTTRANSFER_TYPE_GAMMA: number;
-    readonly SVG_FECOMPONENTTRANSFER_TYPE_IDENTITY: number;
-    readonly SVG_FECOMPONENTTRANSFER_TYPE_LINEAR: number;
-    readonly SVG_FECOMPONENTTRANSFER_TYPE_TABLE: number;
-    readonly SVG_FECOMPONENTTRANSFER_TYPE_UNKNOWN: number;
-}
-
-interface SVGDefsElement extends SVGElement, SVGStylable, SVGTransformable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired {
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGDefsElement: {
-    prototype: SVGDefsElement;
-    new(): SVGDefsElement;
-}
-
-interface SVGDescElement extends SVGElement, SVGStylable, SVGLangSpace {
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGDescElement: {
-    prototype: SVGDescElement;
-    new(): SVGDescElement;
-}
-
-interface SVGElement extends Element {
-    onclick: (this: this, ev: MouseEvent) => any;
-    ondblclick: (this: this, ev: MouseEvent) => any;
-    onfocusin: (this: this, ev: FocusEvent) => any;
-    onfocusout: (this: this, ev: FocusEvent) => any;
-    onload: (this: this, ev: Event) => any;
-    onmousedown: (this: this, ev: MouseEvent) => any;
-    onmousemove: (this: this, ev: MouseEvent) => any;
-    onmouseout: (this: this, ev: MouseEvent) => any;
-    onmouseover: (this: this, ev: MouseEvent) => any;
-    onmouseup: (this: this, ev: MouseEvent) => any;
-    readonly ownerSVGElement: SVGSVGElement;
-    readonly viewportElement: SVGElement;
-    xmlbase: string;
-    className: any;
-    addEventListener(type: "MSGestureChange", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureDoubleTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureEnd", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureHold", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGotPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSInertiaStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSLostPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerCancel", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerDown", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerEnter", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerLeave", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerMove", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOut", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOver", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerUp", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ariarequest", listener: (this: this, ev: AriaRequestEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "click", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "command", listener: (this: this, ev: CommandEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dblclick", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "focusin", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "focusout", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "gotpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "lostpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousedown", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousemove", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseout", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseover", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseup", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointercancel", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerdown", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerenter", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerleave", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointermove", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerout", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerover", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerup", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchcancel", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchend", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchmove", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchstart", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenerror", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "wheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGElement: {
-    prototype: SVGElement;
-    new(): SVGElement;
-}
-
-interface SVGElementInstance extends EventTarget {
-    readonly childNodes: SVGElementInstanceList;
-    readonly correspondingElement: SVGElement;
-    readonly correspondingUseElement: SVGUseElement;
-    readonly firstChild: SVGElementInstance;
-    readonly lastChild: SVGElementInstance;
-    readonly nextSibling: SVGElementInstance;
-    readonly parentNode: SVGElementInstance;
-    readonly previousSibling: SVGElementInstance;
-}
-
-declare var SVGElementInstance: {
-    prototype: SVGElementInstance;
-    new(): SVGElementInstance;
-}
-
-interface SVGElementInstanceList {
-    readonly length: number;
-    item(index: number): SVGElementInstance;
-}
-
-declare var SVGElementInstanceList: {
-    prototype: SVGElementInstanceList;
-    new(): SVGElementInstanceList;
-}
-
-interface SVGEllipseElement extends SVGElement, SVGStylable, SVGTransformable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired {
-    readonly cx: SVGAnimatedLength;
-    readonly cy: SVGAnimatedLength;
-    readonly rx: SVGAnimatedLength;
-    readonly ry: SVGAnimatedLength;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGEllipseElement: {
-    prototype: SVGEllipseElement;
-    new(): SVGEllipseElement;
-}
-
-interface SVGFEBlendElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
-    readonly in1: SVGAnimatedString;
-    readonly in2: SVGAnimatedString;
-    readonly mode: SVGAnimatedEnumeration;
-    readonly SVG_FEBLEND_MODE_COLOR: number;
-    readonly SVG_FEBLEND_MODE_COLOR_BURN: number;
-    readonly SVG_FEBLEND_MODE_COLOR_DODGE: number;
-    readonly SVG_FEBLEND_MODE_DARKEN: number;
-    readonly SVG_FEBLEND_MODE_DIFFERENCE: number;
-    readonly SVG_FEBLEND_MODE_EXCLUSION: number;
-    readonly SVG_FEBLEND_MODE_HARD_LIGHT: number;
-    readonly SVG_FEBLEND_MODE_HUE: number;
-    readonly SVG_FEBLEND_MODE_LIGHTEN: number;
-    readonly SVG_FEBLEND_MODE_LUMINOSITY: number;
-    readonly SVG_FEBLEND_MODE_MULTIPLY: number;
-    readonly SVG_FEBLEND_MODE_NORMAL: number;
-    readonly SVG_FEBLEND_MODE_OVERLAY: number;
-    readonly SVG_FEBLEND_MODE_SATURATION: number;
-    readonly SVG_FEBLEND_MODE_SCREEN: number;
-    readonly SVG_FEBLEND_MODE_SOFT_LIGHT: number;
-    readonly SVG_FEBLEND_MODE_UNKNOWN: number;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFEBlendElement: {
-    prototype: SVGFEBlendElement;
-    new(): SVGFEBlendElement;
-    readonly SVG_FEBLEND_MODE_COLOR: number;
-    readonly SVG_FEBLEND_MODE_COLOR_BURN: number;
-    readonly SVG_FEBLEND_MODE_COLOR_DODGE: number;
-    readonly SVG_FEBLEND_MODE_DARKEN: number;
-    readonly SVG_FEBLEND_MODE_DIFFERENCE: number;
-    readonly SVG_FEBLEND_MODE_EXCLUSION: number;
-    readonly SVG_FEBLEND_MODE_HARD_LIGHT: number;
-    readonly SVG_FEBLEND_MODE_HUE: number;
-    readonly SVG_FEBLEND_MODE_LIGHTEN: number;
-    readonly SVG_FEBLEND_MODE_LUMINOSITY: number;
-    readonly SVG_FEBLEND_MODE_MULTIPLY: number;
-    readonly SVG_FEBLEND_MODE_NORMAL: number;
-    readonly SVG_FEBLEND_MODE_OVERLAY: number;
-    readonly SVG_FEBLEND_MODE_SATURATION: number;
-    readonly SVG_FEBLEND_MODE_SCREEN: number;
-    readonly SVG_FEBLEND_MODE_SOFT_LIGHT: number;
-    readonly SVG_FEBLEND_MODE_UNKNOWN: number;
-}
-
-interface SVGFEColorMatrixElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
-    readonly in1: SVGAnimatedString;
-    readonly type: SVGAnimatedEnumeration;
-    readonly values: SVGAnimatedNumberList;
-    readonly SVG_FECOLORMATRIX_TYPE_HUEROTATE: number;
-    readonly SVG_FECOLORMATRIX_TYPE_LUMINANCETOALPHA: number;
-    readonly SVG_FECOLORMATRIX_TYPE_MATRIX: number;
-    readonly SVG_FECOLORMATRIX_TYPE_SATURATE: number;
-    readonly SVG_FECOLORMATRIX_TYPE_UNKNOWN: number;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFEColorMatrixElement: {
-    prototype: SVGFEColorMatrixElement;
-    new(): SVGFEColorMatrixElement;
-    readonly SVG_FECOLORMATRIX_TYPE_HUEROTATE: number;
-    readonly SVG_FECOLORMATRIX_TYPE_LUMINANCETOALPHA: number;
-    readonly SVG_FECOLORMATRIX_TYPE_MATRIX: number;
-    readonly SVG_FECOLORMATRIX_TYPE_SATURATE: number;
-    readonly SVG_FECOLORMATRIX_TYPE_UNKNOWN: number;
-}
-
-interface SVGFEComponentTransferElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
-    readonly in1: SVGAnimatedString;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFEComponentTransferElement: {
-    prototype: SVGFEComponentTransferElement;
-    new(): SVGFEComponentTransferElement;
-}
-
-interface SVGFECompositeElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
-    readonly in1: SVGAnimatedString;
-    readonly in2: SVGAnimatedString;
-    readonly k1: SVGAnimatedNumber;
-    readonly k2: SVGAnimatedNumber;
-    readonly k3: SVGAnimatedNumber;
-    readonly k4: SVGAnimatedNumber;
-    readonly operator: SVGAnimatedEnumeration;
-    readonly SVG_FECOMPOSITE_OPERATOR_ARITHMETIC: number;
-    readonly SVG_FECOMPOSITE_OPERATOR_ATOP: number;
-    readonly SVG_FECOMPOSITE_OPERATOR_IN: number;
-    readonly SVG_FECOMPOSITE_OPERATOR_OUT: number;
-    readonly SVG_FECOMPOSITE_OPERATOR_OVER: number;
-    readonly SVG_FECOMPOSITE_OPERATOR_UNKNOWN: number;
-    readonly SVG_FECOMPOSITE_OPERATOR_XOR: number;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFECompositeElement: {
-    prototype: SVGFECompositeElement;
-    new(): SVGFECompositeElement;
-    readonly SVG_FECOMPOSITE_OPERATOR_ARITHMETIC: number;
-    readonly SVG_FECOMPOSITE_OPERATOR_ATOP: number;
-    readonly SVG_FECOMPOSITE_OPERATOR_IN: number;
-    readonly SVG_FECOMPOSITE_OPERATOR_OUT: number;
-    readonly SVG_FECOMPOSITE_OPERATOR_OVER: number;
-    readonly SVG_FECOMPOSITE_OPERATOR_UNKNOWN: number;
-    readonly SVG_FECOMPOSITE_OPERATOR_XOR: number;
-}
-
-interface SVGFEConvolveMatrixElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
-    readonly bias: SVGAnimatedNumber;
-    readonly divisor: SVGAnimatedNumber;
-    readonly edgeMode: SVGAnimatedEnumeration;
-    readonly in1: SVGAnimatedString;
-    readonly kernelMatrix: SVGAnimatedNumberList;
-    readonly kernelUnitLengthX: SVGAnimatedNumber;
-    readonly kernelUnitLengthY: SVGAnimatedNumber;
-    readonly orderX: SVGAnimatedInteger;
-    readonly orderY: SVGAnimatedInteger;
-    readonly preserveAlpha: SVGAnimatedBoolean;
-    readonly targetX: SVGAnimatedInteger;
-    readonly targetY: SVGAnimatedInteger;
-    readonly SVG_EDGEMODE_DUPLICATE: number;
-    readonly SVG_EDGEMODE_NONE: number;
-    readonly SVG_EDGEMODE_UNKNOWN: number;
-    readonly SVG_EDGEMODE_WRAP: number;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFEConvolveMatrixElement: {
-    prototype: SVGFEConvolveMatrixElement;
-    new(): SVGFEConvolveMatrixElement;
-    readonly SVG_EDGEMODE_DUPLICATE: number;
-    readonly SVG_EDGEMODE_NONE: number;
-    readonly SVG_EDGEMODE_UNKNOWN: number;
-    readonly SVG_EDGEMODE_WRAP: number;
-}
-
-interface SVGFEDiffuseLightingElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
-    readonly diffuseConstant: SVGAnimatedNumber;
-    readonly in1: SVGAnimatedString;
-    readonly kernelUnitLengthX: SVGAnimatedNumber;
-    readonly kernelUnitLengthY: SVGAnimatedNumber;
-    readonly surfaceScale: SVGAnimatedNumber;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFEDiffuseLightingElement: {
-    prototype: SVGFEDiffuseLightingElement;
-    new(): SVGFEDiffuseLightingElement;
-}
-
-interface SVGFEDisplacementMapElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
-    readonly in1: SVGAnimatedString;
-    readonly in2: SVGAnimatedString;
-    readonly scale: SVGAnimatedNumber;
-    readonly xChannelSelector: SVGAnimatedEnumeration;
-    readonly yChannelSelector: SVGAnimatedEnumeration;
-    readonly SVG_CHANNEL_A: number;
-    readonly SVG_CHANNEL_B: number;
-    readonly SVG_CHANNEL_G: number;
-    readonly SVG_CHANNEL_R: number;
-    readonly SVG_CHANNEL_UNKNOWN: number;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFEDisplacementMapElement: {
-    prototype: SVGFEDisplacementMapElement;
-    new(): SVGFEDisplacementMapElement;
-    readonly SVG_CHANNEL_A: number;
-    readonly SVG_CHANNEL_B: number;
-    readonly SVG_CHANNEL_G: number;
-    readonly SVG_CHANNEL_R: number;
-    readonly SVG_CHANNEL_UNKNOWN: number;
-}
-
-interface SVGFEDistantLightElement extends SVGElement {
-    readonly azimuth: SVGAnimatedNumber;
-    readonly elevation: SVGAnimatedNumber;
-}
-
-declare var SVGFEDistantLightElement: {
-    prototype: SVGFEDistantLightElement;
-    new(): SVGFEDistantLightElement;
-}
-
-interface SVGFEFloodElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFEFloodElement: {
-    prototype: SVGFEFloodElement;
-    new(): SVGFEFloodElement;
-}
-
-interface SVGFEFuncAElement extends SVGComponentTransferFunctionElement {
-}
-
-declare var SVGFEFuncAElement: {
-    prototype: SVGFEFuncAElement;
-    new(): SVGFEFuncAElement;
-}
-
-interface SVGFEFuncBElement extends SVGComponentTransferFunctionElement {
-}
-
-declare var SVGFEFuncBElement: {
-    prototype: SVGFEFuncBElement;
-    new(): SVGFEFuncBElement;
-}
-
-interface SVGFEFuncGElement extends SVGComponentTransferFunctionElement {
-}
-
-declare var SVGFEFuncGElement: {
-    prototype: SVGFEFuncGElement;
-    new(): SVGFEFuncGElement;
-}
-
-interface SVGFEFuncRElement extends SVGComponentTransferFunctionElement {
-}
-
-declare var SVGFEFuncRElement: {
-    prototype: SVGFEFuncRElement;
-    new(): SVGFEFuncRElement;
-}
-
-interface SVGFEGaussianBlurElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
-    readonly in1: SVGAnimatedString;
-    readonly stdDeviationX: SVGAnimatedNumber;
-    readonly stdDeviationY: SVGAnimatedNumber;
-    setStdDeviation(stdDeviationX: number, stdDeviationY: number): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFEGaussianBlurElement: {
-    prototype: SVGFEGaussianBlurElement;
-    new(): SVGFEGaussianBlurElement;
-}
-
-interface SVGFEImageElement extends SVGElement, SVGFilterPrimitiveStandardAttributes, SVGLangSpace, SVGURIReference, SVGExternalResourcesRequired {
-    readonly preserveAspectRatio: SVGAnimatedPreserveAspectRatio;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFEImageElement: {
-    prototype: SVGFEImageElement;
-    new(): SVGFEImageElement;
-}
-
-interface SVGFEMergeElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFEMergeElement: {
-    prototype: SVGFEMergeElement;
-    new(): SVGFEMergeElement;
-}
-
-interface SVGFEMergeNodeElement extends SVGElement {
-    readonly in1: SVGAnimatedString;
-}
-
-declare var SVGFEMergeNodeElement: {
-    prototype: SVGFEMergeNodeElement;
-    new(): SVGFEMergeNodeElement;
-}
-
-interface SVGFEMorphologyElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
-    readonly in1: SVGAnimatedString;
-    readonly operator: SVGAnimatedEnumeration;
-    readonly radiusX: SVGAnimatedNumber;
-    readonly radiusY: SVGAnimatedNumber;
-    readonly SVG_MORPHOLOGY_OPERATOR_DILATE: number;
-    readonly SVG_MORPHOLOGY_OPERATOR_ERODE: number;
-    readonly SVG_MORPHOLOGY_OPERATOR_UNKNOWN: number;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFEMorphologyElement: {
-    prototype: SVGFEMorphologyElement;
-    new(): SVGFEMorphologyElement;
-    readonly SVG_MORPHOLOGY_OPERATOR_DILATE: number;
-    readonly SVG_MORPHOLOGY_OPERATOR_ERODE: number;
-    readonly SVG_MORPHOLOGY_OPERATOR_UNKNOWN: number;
-}
-
-interface SVGFEOffsetElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
-    readonly dx: SVGAnimatedNumber;
-    readonly dy: SVGAnimatedNumber;
-    readonly in1: SVGAnimatedString;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFEOffsetElement: {
-    prototype: SVGFEOffsetElement;
-    new(): SVGFEOffsetElement;
-}
-
-interface SVGFEPointLightElement extends SVGElement {
-    readonly x: SVGAnimatedNumber;
-    readonly y: SVGAnimatedNumber;
-    readonly z: SVGAnimatedNumber;
-}
-
-declare var SVGFEPointLightElement: {
-    prototype: SVGFEPointLightElement;
-    new(): SVGFEPointLightElement;
-}
-
-interface SVGFESpecularLightingElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
-    readonly in1: SVGAnimatedString;
-    readonly kernelUnitLengthX: SVGAnimatedNumber;
-    readonly kernelUnitLengthY: SVGAnimatedNumber;
-    readonly specularConstant: SVGAnimatedNumber;
-    readonly specularExponent: SVGAnimatedNumber;
-    readonly surfaceScale: SVGAnimatedNumber;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFESpecularLightingElement: {
-    prototype: SVGFESpecularLightingElement;
-    new(): SVGFESpecularLightingElement;
-}
-
-interface SVGFESpotLightElement extends SVGElement {
-    readonly limitingConeAngle: SVGAnimatedNumber;
-    readonly pointsAtX: SVGAnimatedNumber;
-    readonly pointsAtY: SVGAnimatedNumber;
-    readonly pointsAtZ: SVGAnimatedNumber;
-    readonly specularExponent: SVGAnimatedNumber;
-    readonly x: SVGAnimatedNumber;
-    readonly y: SVGAnimatedNumber;
-    readonly z: SVGAnimatedNumber;
-}
-
-declare var SVGFESpotLightElement: {
-    prototype: SVGFESpotLightElement;
-    new(): SVGFESpotLightElement;
-}
-
-interface SVGFETileElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
-    readonly in1: SVGAnimatedString;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFETileElement: {
-    prototype: SVGFETileElement;
-    new(): SVGFETileElement;
-}
-
-interface SVGFETurbulenceElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
-    readonly baseFrequencyX: SVGAnimatedNumber;
-    readonly baseFrequencyY: SVGAnimatedNumber;
-    readonly numOctaves: SVGAnimatedInteger;
-    readonly seed: SVGAnimatedNumber;
-    readonly stitchTiles: SVGAnimatedEnumeration;
-    readonly type: SVGAnimatedEnumeration;
-    readonly SVG_STITCHTYPE_NOSTITCH: number;
-    readonly SVG_STITCHTYPE_STITCH: number;
-    readonly SVG_STITCHTYPE_UNKNOWN: number;
-    readonly SVG_TURBULENCE_TYPE_FRACTALNOISE: number;
-    readonly SVG_TURBULENCE_TYPE_TURBULENCE: number;
-    readonly SVG_TURBULENCE_TYPE_UNKNOWN: number;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFETurbulenceElement: {
-    prototype: SVGFETurbulenceElement;
-    new(): SVGFETurbulenceElement;
-    readonly SVG_STITCHTYPE_NOSTITCH: number;
-    readonly SVG_STITCHTYPE_STITCH: number;
-    readonly SVG_STITCHTYPE_UNKNOWN: number;
-    readonly SVG_TURBULENCE_TYPE_FRACTALNOISE: number;
-    readonly SVG_TURBULENCE_TYPE_TURBULENCE: number;
-    readonly SVG_TURBULENCE_TYPE_UNKNOWN: number;
-}
-
-interface SVGFilterElement extends SVGElement, SVGUnitTypes, SVGStylable, SVGLangSpace, SVGURIReference, SVGExternalResourcesRequired {
-    readonly filterResX: SVGAnimatedInteger;
-    readonly filterResY: SVGAnimatedInteger;
-    readonly filterUnits: SVGAnimatedEnumeration;
-    readonly height: SVGAnimatedLength;
-    readonly primitiveUnits: SVGAnimatedEnumeration;
-    readonly width: SVGAnimatedLength;
-    readonly x: SVGAnimatedLength;
-    readonly y: SVGAnimatedLength;
-    setFilterRes(filterResX: number, filterResY: number): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFilterElement: {
-    prototype: SVGFilterElement;
-    new(): SVGFilterElement;
-}
-
-interface SVGForeignObjectElement extends SVGElement, SVGStylable, SVGTransformable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired {
-    readonly height: SVGAnimatedLength;
-    readonly width: SVGAnimatedLength;
-    readonly x: SVGAnimatedLength;
-    readonly y: SVGAnimatedLength;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGForeignObjectElement: {
-    prototype: SVGForeignObjectElement;
-    new(): SVGForeignObjectElement;
-}
-
-interface SVGGElement extends SVGElement, SVGStylable, SVGTransformable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired {
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGGElement: {
-    prototype: SVGGElement;
-    new(): SVGGElement;
-}
-
-interface SVGGradientElement extends SVGElement, SVGStylable, SVGExternalResourcesRequired, SVGURIReference, SVGUnitTypes {
-    readonly gradientTransform: SVGAnimatedTransformList;
-    readonly gradientUnits: SVGAnimatedEnumeration;
-    readonly spreadMethod: SVGAnimatedEnumeration;
-    readonly SVG_SPREADMETHOD_PAD: number;
-    readonly SVG_SPREADMETHOD_REFLECT: number;
-    readonly SVG_SPREADMETHOD_REPEAT: number;
-    readonly SVG_SPREADMETHOD_UNKNOWN: number;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGGradientElement: {
-    prototype: SVGGradientElement;
-    new(): SVGGradientElement;
-    readonly SVG_SPREADMETHOD_PAD: number;
-    readonly SVG_SPREADMETHOD_REFLECT: number;
-    readonly SVG_SPREADMETHOD_REPEAT: number;
-    readonly SVG_SPREADMETHOD_UNKNOWN: number;
-}
-
-interface SVGImageElement extends SVGElement, SVGStylable, SVGTransformable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGURIReference {
-    readonly height: SVGAnimatedLength;
-    readonly preserveAspectRatio: SVGAnimatedPreserveAspectRatio;
-    readonly width: SVGAnimatedLength;
-    readonly x: SVGAnimatedLength;
-    readonly y: SVGAnimatedLength;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGImageElement: {
-    prototype: SVGImageElement;
-    new(): SVGImageElement;
-}
-
-interface SVGLength {
-    readonly unitType: number;
-    value: number;
-    valueAsString: string;
-    valueInSpecifiedUnits: number;
-    convertToSpecifiedUnits(unitType: number): void;
-    newValueSpecifiedUnits(unitType: number, valueInSpecifiedUnits: number): void;
-    readonly SVG_LENGTHTYPE_CM: number;
-    readonly SVG_LENGTHTYPE_EMS: number;
-    readonly SVG_LENGTHTYPE_EXS: number;
-    readonly SVG_LENGTHTYPE_IN: number;
-    readonly SVG_LENGTHTYPE_MM: number;
-    readonly SVG_LENGTHTYPE_NUMBER: number;
-    readonly SVG_LENGTHTYPE_PC: number;
-    readonly SVG_LENGTHTYPE_PERCENTAGE: number;
-    readonly SVG_LENGTHTYPE_PT: number;
-    readonly SVG_LENGTHTYPE_PX: number;
-    readonly SVG_LENGTHTYPE_UNKNOWN: number;
-}
-
-declare var SVGLength: {
-    prototype: SVGLength;
-    new(): SVGLength;
-    readonly SVG_LENGTHTYPE_CM: number;
-    readonly SVG_LENGTHTYPE_EMS: number;
-    readonly SVG_LENGTHTYPE_EXS: number;
-    readonly SVG_LENGTHTYPE_IN: number;
-    readonly SVG_LENGTHTYPE_MM: number;
-    readonly SVG_LENGTHTYPE_NUMBER: number;
-    readonly SVG_LENGTHTYPE_PC: number;
-    readonly SVG_LENGTHTYPE_PERCENTAGE: number;
-    readonly SVG_LENGTHTYPE_PT: number;
-    readonly SVG_LENGTHTYPE_PX: number;
-    readonly SVG_LENGTHTYPE_UNKNOWN: number;
-}
-
-interface SVGLengthList {
-    readonly numberOfItems: number;
-    appendItem(newItem: SVGLength): SVGLength;
-    clear(): void;
-    getItem(index: number): SVGLength;
-    initialize(newItem: SVGLength): SVGLength;
-    insertItemBefore(newItem: SVGLength, index: number): SVGLength;
-    removeItem(index: number): SVGLength;
-    replaceItem(newItem: SVGLength, index: number): SVGLength;
-}
-
-declare var SVGLengthList: {
-    prototype: SVGLengthList;
-    new(): SVGLengthList;
-}
-
-interface SVGLineElement extends SVGElement, SVGStylable, SVGTransformable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired {
-    readonly x1: SVGAnimatedLength;
-    readonly x2: SVGAnimatedLength;
-    readonly y1: SVGAnimatedLength;
-    readonly y2: SVGAnimatedLength;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGLineElement: {
-    prototype: SVGLineElement;
-    new(): SVGLineElement;
-}
-
-interface SVGLinearGradientElement extends SVGGradientElement {
-    readonly x1: SVGAnimatedLength;
-    readonly x2: SVGAnimatedLength;
-    readonly y1: SVGAnimatedLength;
-    readonly y2: SVGAnimatedLength;
-}
-
-declare var SVGLinearGradientElement: {
-    prototype: SVGLinearGradientElement;
-    new(): SVGLinearGradientElement;
-}
-
-interface SVGMarkerElement extends SVGElement, SVGStylable, SVGLangSpace, SVGExternalResourcesRequired, SVGFitToViewBox {
-    readonly markerHeight: SVGAnimatedLength;
-    readonly markerUnits: SVGAnimatedEnumeration;
-    readonly markerWidth: SVGAnimatedLength;
-    readonly orientAngle: SVGAnimatedAngle;
-    readonly orientType: SVGAnimatedEnumeration;
-    readonly refX: SVGAnimatedLength;
-    readonly refY: SVGAnimatedLength;
-    setOrientToAngle(angle: SVGAngle): void;
-    setOrientToAuto(): void;
-    readonly SVG_MARKERUNITS_STROKEWIDTH: number;
-    readonly SVG_MARKERUNITS_UNKNOWN: number;
-    readonly SVG_MARKERUNITS_USERSPACEONUSE: number;
-    readonly SVG_MARKER_ORIENT_ANGLE: number;
-    readonly SVG_MARKER_ORIENT_AUTO: number;
-    readonly SVG_MARKER_ORIENT_UNKNOWN: number;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGMarkerElement: {
-    prototype: SVGMarkerElement;
-    new(): SVGMarkerElement;
-    readonly SVG_MARKERUNITS_STROKEWIDTH: number;
-    readonly SVG_MARKERUNITS_UNKNOWN: number;
-    readonly SVG_MARKERUNITS_USERSPACEONUSE: number;
-    readonly SVG_MARKER_ORIENT_ANGLE: number;
-    readonly SVG_MARKER_ORIENT_AUTO: number;
-    readonly SVG_MARKER_ORIENT_UNKNOWN: number;
-}
-
-interface SVGMaskElement extends SVGElement, SVGStylable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGUnitTypes {
-    readonly height: SVGAnimatedLength;
-    readonly maskContentUnits: SVGAnimatedEnumeration;
-    readonly maskUnits: SVGAnimatedEnumeration;
-    readonly width: SVGAnimatedLength;
-    readonly x: SVGAnimatedLength;
-    readonly y: SVGAnimatedLength;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGMaskElement: {
-    prototype: SVGMaskElement;
-    new(): SVGMaskElement;
-}
-
-interface SVGMatrix {
-    a: number;
-    b: number;
-    c: number;
-    d: number;
-    e: number;
-    f: number;
-    flipX(): SVGMatrix;
-    flipY(): SVGMatrix;
-    inverse(): SVGMatrix;
-    multiply(secondMatrix: SVGMatrix): SVGMatrix;
-    rotate(angle: number): SVGMatrix;
-    rotateFromVector(x: number, y: number): SVGMatrix;
-    scale(scaleFactor: number): SVGMatrix;
-    scaleNonUniform(scaleFactorX: number, scaleFactorY: number): SVGMatrix;
-    skewX(angle: number): SVGMatrix;
-    skewY(angle: number): SVGMatrix;
-    translate(x: number, y: number): SVGMatrix;
-}
-
-declare var SVGMatrix: {
-    prototype: SVGMatrix;
-    new(): SVGMatrix;
-}
-
-interface SVGMetadataElement extends SVGElement {
-}
-
-declare var SVGMetadataElement: {
-    prototype: SVGMetadataElement;
-    new(): SVGMetadataElement;
-}
-
-interface SVGNumber {
-    value: number;
-}
-
-declare var SVGNumber: {
-    prototype: SVGNumber;
-    new(): SVGNumber;
-}
-
-interface SVGNumberList {
-    readonly numberOfItems: number;
-    appendItem(newItem: SVGNumber): SVGNumber;
-    clear(): void;
-    getItem(index: number): SVGNumber;
-    initialize(newItem: SVGNumber): SVGNumber;
-    insertItemBefore(newItem: SVGNumber, index: number): SVGNumber;
-    removeItem(index: number): SVGNumber;
-    replaceItem(newItem: SVGNumber, index: number): SVGNumber;
-}
-
-declare var SVGNumberList: {
-    prototype: SVGNumberList;
-    new(): SVGNumberList;
-}
-
-interface SVGPathElement extends SVGElement, SVGStylable, SVGTransformable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGAnimatedPathData {
-    createSVGPathSegArcAbs(x: number, y: number, r1: number, r2: number, angle: number, largeArcFlag: boolean, sweepFlag: boolean): SVGPathSegArcAbs;
-    createSVGPathSegArcRel(x: number, y: number, r1: number, r2: number, angle: number, largeArcFlag: boolean, sweepFlag: boolean): SVGPathSegArcRel;
-    createSVGPathSegClosePath(): SVGPathSegClosePath;
-    createSVGPathSegCurvetoCubicAbs(x: number, y: number, x1: number, y1: number, x2: number, y2: number): SVGPathSegCurvetoCubicAbs;
-    createSVGPathSegCurvetoCubicRel(x: number, y: number, x1: number, y1: number, x2: number, y2: number): SVGPathSegCurvetoCubicRel;
-    createSVGPathSegCurvetoCubicSmoothAbs(x: number, y: number, x2: number, y2: number): SVGPathSegCurvetoCubicSmoothAbs;
-    createSVGPathSegCurvetoCubicSmoothRel(x: number, y: number, x2: number, y2: number): SVGPathSegCurvetoCubicSmoothRel;
-    createSVGPathSegCurvetoQuadraticAbs(x: number, y: number, x1: number, y1: number): SVGPathSegCurvetoQuadraticAbs;
-    createSVGPathSegCurvetoQuadraticRel(x: number, y: number, x1: number, y1: number): SVGPathSegCurvetoQuadraticRel;
-    createSVGPathSegCurvetoQuadraticSmoothAbs(x: number, y: number): SVGPathSegCurvetoQuadraticSmoothAbs;
-    createSVGPathSegCurvetoQuadraticSmoothRel(x: number, y: number): SVGPathSegCurvetoQuadraticSmoothRel;
-    createSVGPathSegLinetoAbs(x: number, y: number): SVGPathSegLinetoAbs;
-    createSVGPathSegLinetoHorizontalAbs(x: number): SVGPathSegLinetoHorizontalAbs;
-    createSVGPathSegLinetoHorizontalRel(x: number): SVGPathSegLinetoHorizontalRel;
-    createSVGPathSegLinetoRel(x: number, y: number): SVGPathSegLinetoRel;
-    createSVGPathSegLinetoVerticalAbs(y: number): SVGPathSegLinetoVerticalAbs;
-    createSVGPathSegLinetoVerticalRel(y: number): SVGPathSegLinetoVerticalRel;
-    createSVGPathSegMovetoAbs(x: number, y: number): SVGPathSegMovetoAbs;
-    createSVGPathSegMovetoRel(x: number, y: number): SVGPathSegMovetoRel;
-    getPathSegAtLength(distance: number): number;
-    getPointAtLength(distance: number): SVGPoint;
-    getTotalLength(): number;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGPathElement: {
-    prototype: SVGPathElement;
-    new(): SVGPathElement;
-}
-
-interface SVGPathSeg {
-    readonly pathSegType: number;
-    readonly pathSegTypeAsLetter: string;
-    readonly PATHSEG_ARC_ABS: number;
-    readonly PATHSEG_ARC_REL: number;
-    readonly PATHSEG_CLOSEPATH: number;
-    readonly PATHSEG_CURVETO_CUBIC_ABS: number;
-    readonly PATHSEG_CURVETO_CUBIC_REL: number;
-    readonly PATHSEG_CURVETO_CUBIC_SMOOTH_ABS: number;
-    readonly PATHSEG_CURVETO_CUBIC_SMOOTH_REL: number;
-    readonly PATHSEG_CURVETO_QUADRATIC_ABS: number;
-    readonly PATHSEG_CURVETO_QUADRATIC_REL: number;
-    readonly PATHSEG_CURVETO_QUADRATIC_SMOOTH_ABS: number;
-    readonly PATHSEG_CURVETO_QUADRATIC_SMOOTH_REL: number;
-    readonly PATHSEG_LINETO_ABS: number;
-    readonly PATHSEG_LINETO_HORIZONTAL_ABS: number;
-    readonly PATHSEG_LINETO_HORIZONTAL_REL: number;
-    readonly PATHSEG_LINETO_REL: number;
-    readonly PATHSEG_LINETO_VERTICAL_ABS: number;
-    readonly PATHSEG_LINETO_VERTICAL_REL: number;
-    readonly PATHSEG_MOVETO_ABS: number;
-    readonly PATHSEG_MOVETO_REL: number;
-    readonly PATHSEG_UNKNOWN: number;
-}
-
-declare var SVGPathSeg: {
-    prototype: SVGPathSeg;
-    new(): SVGPathSeg;
-    readonly PATHSEG_ARC_ABS: number;
-    readonly PATHSEG_ARC_REL: number;
-    readonly PATHSEG_CLOSEPATH: number;
-    readonly PATHSEG_CURVETO_CUBIC_ABS: number;
-    readonly PATHSEG_CURVETO_CUBIC_REL: number;
-    readonly PATHSEG_CURVETO_CUBIC_SMOOTH_ABS: number;
-    readonly PATHSEG_CURVETO_CUBIC_SMOOTH_REL: number;
-    readonly PATHSEG_CURVETO_QUADRATIC_ABS: number;
-    readonly PATHSEG_CURVETO_QUADRATIC_REL: number;
-    readonly PATHSEG_CURVETO_QUADRATIC_SMOOTH_ABS: number;
-    readonly PATHSEG_CURVETO_QUADRATIC_SMOOTH_REL: number;
-    readonly PATHSEG_LINETO_ABS: number;
-    readonly PATHSEG_LINETO_HORIZONTAL_ABS: number;
-    readonly PATHSEG_LINETO_HORIZONTAL_REL: number;
-    readonly PATHSEG_LINETO_REL: number;
-    readonly PATHSEG_LINETO_VERTICAL_ABS: number;
-    readonly PATHSEG_LINETO_VERTICAL_REL: number;
-    readonly PATHSEG_MOVETO_ABS: number;
-    readonly PATHSEG_MOVETO_REL: number;
-    readonly PATHSEG_UNKNOWN: number;
-}
-
-interface SVGPathSegArcAbs extends SVGPathSeg {
-    angle: number;
-    largeArcFlag: boolean;
-    r1: number;
-    r2: number;
-    sweepFlag: boolean;
-    x: number;
-    y: number;
-}
-
-declare var SVGPathSegArcAbs: {
-    prototype: SVGPathSegArcAbs;
-    new(): SVGPathSegArcAbs;
-}
-
-interface SVGPathSegArcRel extends SVGPathSeg {
-    angle: number;
-    largeArcFlag: boolean;
-    r1: number;
-    r2: number;
-    sweepFlag: boolean;
-    x: number;
-    y: number;
-}
-
-declare var SVGPathSegArcRel: {
-    prototype: SVGPathSegArcRel;
-    new(): SVGPathSegArcRel;
-}
-
-interface SVGPathSegClosePath extends SVGPathSeg {
-}
-
-declare var SVGPathSegClosePath: {
-    prototype: SVGPathSegClosePath;
-    new(): SVGPathSegClosePath;
-}
-
-interface SVGPathSegCurvetoCubicAbs extends SVGPathSeg {
-    x: number;
-    x1: number;
-    x2: number;
-    y: number;
-    y1: number;
-    y2: number;
-}
-
-declare var SVGPathSegCurvetoCubicAbs: {
-    prototype: SVGPathSegCurvetoCubicAbs;
-    new(): SVGPathSegCurvetoCubicAbs;
-}
-
-interface SVGPathSegCurvetoCubicRel extends SVGPathSeg {
-    x: number;
-    x1: number;
-    x2: number;
-    y: number;
-    y1: number;
-    y2: number;
-}
-
-declare var SVGPathSegCurvetoCubicRel: {
-    prototype: SVGPathSegCurvetoCubicRel;
-    new(): SVGPathSegCurvetoCubicRel;
-}
-
-interface SVGPathSegCurvetoCubicSmoothAbs extends SVGPathSeg {
-    x: number;
-    x2: number;
-    y: number;
-    y2: number;
-}
-
-declare var SVGPathSegCurvetoCubicSmoothAbs: {
-    prototype: SVGPathSegCurvetoCubicSmoothAbs;
-    new(): SVGPathSegCurvetoCubicSmoothAbs;
-}
-
-interface SVGPathSegCurvetoCubicSmoothRel extends SVGPathSeg {
-    x: number;
-    x2: number;
-    y: number;
-    y2: number;
-}
-
-declare var SVGPathSegCurvetoCubicSmoothRel: {
-    prototype: SVGPathSegCurvetoCubicSmoothRel;
-    new(): SVGPathSegCurvetoCubicSmoothRel;
-}
-
-interface SVGPathSegCurvetoQuadraticAbs extends SVGPathSeg {
-    x: number;
-    x1: number;
-    y: number;
-    y1: number;
-}
-
-declare var SVGPathSegCurvetoQuadraticAbs: {
-    prototype: SVGPathSegCurvetoQuadraticAbs;
-    new(): SVGPathSegCurvetoQuadraticAbs;
-}
-
-interface SVGPathSegCurvetoQuadraticRel extends SVGPathSeg {
-    x: number;
-    x1: number;
-    y: number;
-    y1: number;
-}
-
-declare var SVGPathSegCurvetoQuadraticRel: {
-    prototype: SVGPathSegCurvetoQuadraticRel;
-    new(): SVGPathSegCurvetoQuadraticRel;
-}
-
-interface SVGPathSegCurvetoQuadraticSmoothAbs extends SVGPathSeg {
-    x: number;
-    y: number;
-}
-
-declare var SVGPathSegCurvetoQuadraticSmoothAbs: {
-    prototype: SVGPathSegCurvetoQuadraticSmoothAbs;
-    new(): SVGPathSegCurvetoQuadraticSmoothAbs;
-}
-
-interface SVGPathSegCurvetoQuadraticSmoothRel extends SVGPathSeg {
-    x: number;
-    y: number;
-}
-
-declare var SVGPathSegCurvetoQuadraticSmoothRel: {
-    prototype: SVGPathSegCurvetoQuadraticSmoothRel;
-    new(): SVGPathSegCurvetoQuadraticSmoothRel;
-}
-
-interface SVGPathSegLinetoAbs extends SVGPathSeg {
-    x: number;
-    y: number;
-}
-
-declare var SVGPathSegLinetoAbs: {
-    prototype: SVGPathSegLinetoAbs;
-    new(): SVGPathSegLinetoAbs;
-}
-
-interface SVGPathSegLinetoHorizontalAbs extends SVGPathSeg {
-    x: number;
-}
-
-declare var SVGPathSegLinetoHorizontalAbs: {
-    prototype: SVGPathSegLinetoHorizontalAbs;
-    new(): SVGPathSegLinetoHorizontalAbs;
-}
-
-interface SVGPathSegLinetoHorizontalRel extends SVGPathSeg {
-    x: number;
-}
-
-declare var SVGPathSegLinetoHorizontalRel: {
-    prototype: SVGPathSegLinetoHorizontalRel;
-    new(): SVGPathSegLinetoHorizontalRel;
-}
-
-interface SVGPathSegLinetoRel extends SVGPathSeg {
-    x: number;
-    y: number;
-}
-
-declare var SVGPathSegLinetoRel: {
-    prototype: SVGPathSegLinetoRel;
-    new(): SVGPathSegLinetoRel;
-}
-
-interface SVGPathSegLinetoVerticalAbs extends SVGPathSeg {
-    y: number;
-}
-
-declare var SVGPathSegLinetoVerticalAbs: {
-    prototype: SVGPathSegLinetoVerticalAbs;
-    new(): SVGPathSegLinetoVerticalAbs;
-}
-
-interface SVGPathSegLinetoVerticalRel extends SVGPathSeg {
-    y: number;
-}
-
-declare var SVGPathSegLinetoVerticalRel: {
-    prototype: SVGPathSegLinetoVerticalRel;
-    new(): SVGPathSegLinetoVerticalRel;
-}
-
-interface SVGPathSegList {
-    readonly numberOfItems: number;
-    appendItem(newItem: SVGPathSeg): SVGPathSeg;
-    clear(): void;
-    getItem(index: number): SVGPathSeg;
-    initialize(newItem: SVGPathSeg): SVGPathSeg;
-    insertItemBefore(newItem: SVGPathSeg, index: number): SVGPathSeg;
-    removeItem(index: number): SVGPathSeg;
-    replaceItem(newItem: SVGPathSeg, index: number): SVGPathSeg;
-}
-
-declare var SVGPathSegList: {
-    prototype: SVGPathSegList;
-    new(): SVGPathSegList;
-}
-
-interface SVGPathSegMovetoAbs extends SVGPathSeg {
-    x: number;
-    y: number;
-}
-
-declare var SVGPathSegMovetoAbs: {
-    prototype: SVGPathSegMovetoAbs;
-    new(): SVGPathSegMovetoAbs;
-}
-
-interface SVGPathSegMovetoRel extends SVGPathSeg {
-    x: number;
-    y: number;
-}
-
-declare var SVGPathSegMovetoRel: {
-    prototype: SVGPathSegMovetoRel;
-    new(): SVGPathSegMovetoRel;
-}
-
-interface SVGPatternElement extends SVGElement, SVGStylable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGFitToViewBox, SVGURIReference, SVGUnitTypes {
-    readonly height: SVGAnimatedLength;
-    readonly patternContentUnits: SVGAnimatedEnumeration;
-    readonly patternTransform: SVGAnimatedTransformList;
-    readonly patternUnits: SVGAnimatedEnumeration;
-    readonly width: SVGAnimatedLength;
-    readonly x: SVGAnimatedLength;
-    readonly y: SVGAnimatedLength;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGPatternElement: {
-    prototype: SVGPatternElement;
-    new(): SVGPatternElement;
-}
-
-interface SVGPoint {
-    x: number;
-    y: number;
-    matrixTransform(matrix: SVGMatrix): SVGPoint;
-}
-
-declare var SVGPoint: {
-    prototype: SVGPoint;
-    new(): SVGPoint;
-}
-
-interface SVGPointList {
-    readonly numberOfItems: number;
-    appendItem(newItem: SVGPoint): SVGPoint;
-    clear(): void;
-    getItem(index: number): SVGPoint;
-    initialize(newItem: SVGPoint): SVGPoint;
-    insertItemBefore(newItem: SVGPoint, index: number): SVGPoint;
-    removeItem(index: number): SVGPoint;
-    replaceItem(newItem: SVGPoint, index: number): SVGPoint;
-}
-
-declare var SVGPointList: {
-    prototype: SVGPointList;
-    new(): SVGPointList;
-}
-
-interface SVGPolygonElement extends SVGElement, SVGStylable, SVGTransformable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGAnimatedPoints {
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGPolygonElement: {
-    prototype: SVGPolygonElement;
-    new(): SVGPolygonElement;
-}
-
-interface SVGPolylineElement extends SVGElement, SVGStylable, SVGTransformable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGAnimatedPoints {
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGPolylineElement: {
-    prototype: SVGPolylineElement;
-    new(): SVGPolylineElement;
-}
-
-interface SVGPreserveAspectRatio {
-    align: number;
-    meetOrSlice: number;
-    readonly SVG_MEETORSLICE_MEET: number;
-    readonly SVG_MEETORSLICE_SLICE: number;
-    readonly SVG_MEETORSLICE_UNKNOWN: number;
-    readonly SVG_PRESERVEASPECTRATIO_NONE: number;
-    readonly SVG_PRESERVEASPECTRATIO_UNKNOWN: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMAXYMAX: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMAXYMID: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMAXYMIN: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMIDYMAX: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMIDYMID: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMIDYMIN: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMINYMAX: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMINYMID: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMINYMIN: number;
-}
-
-declare var SVGPreserveAspectRatio: {
-    prototype: SVGPreserveAspectRatio;
-    new(): SVGPreserveAspectRatio;
-    readonly SVG_MEETORSLICE_MEET: number;
-    readonly SVG_MEETORSLICE_SLICE: number;
-    readonly SVG_MEETORSLICE_UNKNOWN: number;
-    readonly SVG_PRESERVEASPECTRATIO_NONE: number;
-    readonly SVG_PRESERVEASPECTRATIO_UNKNOWN: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMAXYMAX: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMAXYMID: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMAXYMIN: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMIDYMAX: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMIDYMID: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMIDYMIN: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMINYMAX: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMINYMID: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMINYMIN: number;
-}
-
-interface SVGRadialGradientElement extends SVGGradientElement {
-    readonly cx: SVGAnimatedLength;
-    readonly cy: SVGAnimatedLength;
-    readonly fx: SVGAnimatedLength;
-    readonly fy: SVGAnimatedLength;
-    readonly r: SVGAnimatedLength;
-}
-
-declare var SVGRadialGradientElement: {
-    prototype: SVGRadialGradientElement;
-    new(): SVGRadialGradientElement;
-}
-
-interface SVGRect {
-    height: number;
-    width: number;
-    x: number;
-    y: number;
-}
-
-declare var SVGRect: {
-    prototype: SVGRect;
-    new(): SVGRect;
-}
-
-interface SVGRectElement extends SVGElement, SVGStylable, SVGTransformable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired {
-    readonly height: SVGAnimatedLength;
-    readonly rx: SVGAnimatedLength;
-    readonly ry: SVGAnimatedLength;
-    readonly width: SVGAnimatedLength;
-    readonly x: SVGAnimatedLength;
-    readonly y: SVGAnimatedLength;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGRectElement: {
-    prototype: SVGRectElement;
-    new(): SVGRectElement;
-}
-
-interface SVGSVGElement extends SVGElement, DocumentEvent, SVGLocatable, SVGTests, SVGStylable, SVGLangSpace, SVGExternalResourcesRequired, SVGFitToViewBox, SVGZoomAndPan {
-    contentScriptType: string;
-    contentStyleType: string;
-    currentScale: number;
-    readonly currentTranslate: SVGPoint;
-    readonly height: SVGAnimatedLength;
-    onabort: (this: this, ev: Event) => any;
-    onerror: (this: this, ev: Event) => any;
-    onresize: (this: this, ev: UIEvent) => any;
-    onscroll: (this: this, ev: UIEvent) => any;
-    onunload: (this: this, ev: Event) => any;
-    onzoom: (this: this, ev: SVGZoomEvent) => any;
-    readonly pixelUnitToMillimeterX: number;
-    readonly pixelUnitToMillimeterY: number;
-    readonly screenPixelToMillimeterX: number;
-    readonly screenPixelToMillimeterY: number;
-    readonly viewport: SVGRect;
-    readonly width: SVGAnimatedLength;
-    readonly x: SVGAnimatedLength;
-    readonly y: SVGAnimatedLength;
-    checkEnclosure(element: SVGElement, rect: SVGRect): boolean;
-    checkIntersection(element: SVGElement, rect: SVGRect): boolean;
-    createSVGAngle(): SVGAngle;
-    createSVGLength(): SVGLength;
-    createSVGMatrix(): SVGMatrix;
-    createSVGNumber(): SVGNumber;
-    createSVGPoint(): SVGPoint;
-    createSVGRect(): SVGRect;
-    createSVGTransform(): SVGTransform;
-    createSVGTransformFromMatrix(matrix: SVGMatrix): SVGTransform;
-    deselectAll(): void;
-    forceRedraw(): void;
-    getComputedStyle(elt: Element, pseudoElt?: string): CSSStyleDeclaration;
-    getCurrentTime(): number;
-    getElementById(elementId: string): Element;
-    getEnclosureList(rect: SVGRect, referenceElement: SVGElement): NodeListOf<SVGCircleElement | SVGEllipseElement | SVGImageElement | SVGLineElement | SVGPathElement | SVGPolygonElement | SVGPolylineElement | SVGRectElement | SVGTextElement | SVGUseElement>;
-    getIntersectionList(rect: SVGRect, referenceElement: SVGElement): NodeListOf<SVGCircleElement | SVGEllipseElement | SVGImageElement | SVGLineElement | SVGPathElement | SVGPolygonElement | SVGPolylineElement | SVGRectElement | SVGTextElement | SVGUseElement>;
-    pauseAnimations(): void;
-    setCurrentTime(seconds: number): void;
-    suspendRedraw(maxWaitMilliseconds: number): number;
-    unpauseAnimations(): void;
-    unsuspendRedraw(suspendHandleID: number): void;
-    unsuspendRedrawAll(): void;
-    addEventListener(type: "MSGestureChange", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureDoubleTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureEnd", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureHold", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGotPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSInertiaStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSLostPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerCancel", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerDown", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerEnter", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerLeave", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerMove", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOut", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOver", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerUp", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "SVGAbort", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "SVGError", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "SVGUnload", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "SVGZoom", listener: (this: this, ev: SVGZoomEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ariarequest", listener: (this: this, ev: AriaRequestEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "click", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "command", listener: (this: this, ev: CommandEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dblclick", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "focusin", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "focusout", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "gotpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "lostpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousedown", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousemove", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseout", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseover", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseup", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointercancel", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerdown", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerenter", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerleave", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointermove", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerout", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerover", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerup", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "resize", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "scroll", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchcancel", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchend", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchmove", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchstart", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenerror", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "wheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGSVGElement: {
-    prototype: SVGSVGElement;
-    new(): SVGSVGElement;
-}
-
-interface SVGScriptElement extends SVGElement, SVGExternalResourcesRequired, SVGURIReference {
-    type: string;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGScriptElement: {
-    prototype: SVGScriptElement;
-    new(): SVGScriptElement;
-}
-
-interface SVGStopElement extends SVGElement, SVGStylable {
-    readonly offset: SVGAnimatedNumber;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGStopElement: {
-    prototype: SVGStopElement;
-    new(): SVGStopElement;
-}
-
-interface SVGStringList {
-    readonly numberOfItems: number;
-    appendItem(newItem: string): string;
-    clear(): void;
-    getItem(index: number): string;
-    initialize(newItem: string): string;
-    insertItemBefore(newItem: string, index: number): string;
-    removeItem(index: number): string;
-    replaceItem(newItem: string, index: number): string;
-}
-
-declare var SVGStringList: {
-    prototype: SVGStringList;
-    new(): SVGStringList;
-}
-
-interface SVGStyleElement extends SVGElement, SVGLangSpace {
-    disabled: boolean;
-    media: string;
-    title: string;
-    type: string;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGStyleElement: {
-    prototype: SVGStyleElement;
-    new(): SVGStyleElement;
-}
-
-interface SVGSwitchElement extends SVGElement, SVGStylable, SVGTransformable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired {
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGSwitchElement: {
-    prototype: SVGSwitchElement;
-    new(): SVGSwitchElement;
-}
-
-interface SVGSymbolElement extends SVGElement, SVGStylable, SVGLangSpace, SVGExternalResourcesRequired, SVGFitToViewBox {
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGSymbolElement: {
-    prototype: SVGSymbolElement;
-    new(): SVGSymbolElement;
-}
-
-interface SVGTSpanElement extends SVGTextPositioningElement {
-}
-
-declare var SVGTSpanElement: {
-    prototype: SVGTSpanElement;
-    new(): SVGTSpanElement;
-}
-
-interface SVGTextContentElement extends SVGElement, SVGStylable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired {
-    readonly lengthAdjust: SVGAnimatedEnumeration;
-    readonly textLength: SVGAnimatedLength;
-    getCharNumAtPosition(point: SVGPoint): number;
-    getComputedTextLength(): number;
-    getEndPositionOfChar(charnum: number): SVGPoint;
-    getExtentOfChar(charnum: number): SVGRect;
-    getNumberOfChars(): number;
-    getRotationOfChar(charnum: number): number;
-    getStartPositionOfChar(charnum: number): SVGPoint;
-    getSubStringLength(charnum: number, nchars: number): number;
-    selectSubString(charnum: number, nchars: number): void;
-    readonly LENGTHADJUST_SPACING: number;
-    readonly LENGTHADJUST_SPACINGANDGLYPHS: number;
-    readonly LENGTHADJUST_UNKNOWN: number;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGTextContentElement: {
-    prototype: SVGTextContentElement;
-    new(): SVGTextContentElement;
-    readonly LENGTHADJUST_SPACING: number;
-    readonly LENGTHADJUST_SPACINGANDGLYPHS: number;
-    readonly LENGTHADJUST_UNKNOWN: number;
-}
-
-interface SVGTextElement extends SVGTextPositioningElement, SVGTransformable {
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGTextElement: {
-    prototype: SVGTextElement;
-    new(): SVGTextElement;
-}
-
-interface SVGTextPathElement extends SVGTextContentElement, SVGURIReference {
-    readonly method: SVGAnimatedEnumeration;
-    readonly spacing: SVGAnimatedEnumeration;
-    readonly startOffset: SVGAnimatedLength;
-    readonly TEXTPATH_METHODTYPE_ALIGN: number;
-    readonly TEXTPATH_METHODTYPE_STRETCH: number;
-    readonly TEXTPATH_METHODTYPE_UNKNOWN: number;
-    readonly TEXTPATH_SPACINGTYPE_AUTO: number;
-    readonly TEXTPATH_SPACINGTYPE_EXACT: number;
-    readonly TEXTPATH_SPACINGTYPE_UNKNOWN: number;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGTextPathElement: {
-    prototype: SVGTextPathElement;
-    new(): SVGTextPathElement;
-    readonly TEXTPATH_METHODTYPE_ALIGN: number;
-    readonly TEXTPATH_METHODTYPE_STRETCH: number;
-    readonly TEXTPATH_METHODTYPE_UNKNOWN: number;
-    readonly TEXTPATH_SPACINGTYPE_AUTO: number;
-    readonly TEXTPATH_SPACINGTYPE_EXACT: number;
-    readonly TEXTPATH_SPACINGTYPE_UNKNOWN: number;
-}
-
-interface SVGTextPositioningElement extends SVGTextContentElement {
-    readonly dx: SVGAnimatedLengthList;
-    readonly dy: SVGAnimatedLengthList;
-    readonly rotate: SVGAnimatedNumberList;
-    readonly x: SVGAnimatedLengthList;
-    readonly y: SVGAnimatedLengthList;
-}
-
-declare var SVGTextPositioningElement: {
-    prototype: SVGTextPositioningElement;
-    new(): SVGTextPositioningElement;
-}
-
-interface SVGTitleElement extends SVGElement, SVGStylable, SVGLangSpace {
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGTitleElement: {
-    prototype: SVGTitleElement;
-    new(): SVGTitleElement;
-}
-
-interface SVGTransform {
-    readonly angle: number;
-    readonly matrix: SVGMatrix;
-    readonly type: number;
-    setMatrix(matrix: SVGMatrix): void;
-    setRotate(angle: number, cx: number, cy: number): void;
-    setScale(sx: number, sy: number): void;
-    setSkewX(angle: number): void;
-    setSkewY(angle: number): void;
-    setTranslate(tx: number, ty: number): void;
-    readonly SVG_TRANSFORM_MATRIX: number;
-    readonly SVG_TRANSFORM_ROTATE: number;
-    readonly SVG_TRANSFORM_SCALE: number;
-    readonly SVG_TRANSFORM_SKEWX: number;
-    readonly SVG_TRANSFORM_SKEWY: number;
-    readonly SVG_TRANSFORM_TRANSLATE: number;
-    readonly SVG_TRANSFORM_UNKNOWN: number;
-}
-
-declare var SVGTransform: {
-    prototype: SVGTransform;
-    new(): SVGTransform;
-    readonly SVG_TRANSFORM_MATRIX: number;
-    readonly SVG_TRANSFORM_ROTATE: number;
-    readonly SVG_TRANSFORM_SCALE: number;
-    readonly SVG_TRANSFORM_SKEWX: number;
-    readonly SVG_TRANSFORM_SKEWY: number;
-    readonly SVG_TRANSFORM_TRANSLATE: number;
-    readonly SVG_TRANSFORM_UNKNOWN: number;
-}
-
-interface SVGTransformList {
-    readonly numberOfItems: number;
-    appendItem(newItem: SVGTransform): SVGTransform;
-    clear(): void;
-    consolidate(): SVGTransform;
-    createSVGTransformFromMatrix(matrix: SVGMatrix): SVGTransform;
-    getItem(index: number): SVGTransform;
-    initialize(newItem: SVGTransform): SVGTransform;
-    insertItemBefore(newItem: SVGTransform, index: number): SVGTransform;
-    removeItem(index: number): SVGTransform;
-    replaceItem(newItem: SVGTransform, index: number): SVGTransform;
-}
-
-declare var SVGTransformList: {
-    prototype: SVGTransformList;
-    new(): SVGTransformList;
-}
-
-interface SVGUnitTypes {
-    readonly SVG_UNIT_TYPE_OBJECTBOUNDINGBOX: number;
-    readonly SVG_UNIT_TYPE_UNKNOWN: number;
-    readonly SVG_UNIT_TYPE_USERSPACEONUSE: number;
-}
-declare var SVGUnitTypes: SVGUnitTypes;
-
-interface SVGUseElement extends SVGElement, SVGStylable, SVGTransformable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGURIReference {
-    readonly animatedInstanceRoot: SVGElementInstance;
-    readonly height: SVGAnimatedLength;
-    readonly instanceRoot: SVGElementInstance;
-    readonly width: SVGAnimatedLength;
-    readonly x: SVGAnimatedLength;
-    readonly y: SVGAnimatedLength;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGUseElement: {
-    prototype: SVGUseElement;
-    new(): SVGUseElement;
-}
-
-interface SVGViewElement extends SVGElement, SVGExternalResourcesRequired, SVGFitToViewBox, SVGZoomAndPan {
-    readonly viewTarget: SVGStringList;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGViewElement: {
-    prototype: SVGViewElement;
-    new(): SVGViewElement;
-}
-
-interface SVGZoomAndPan {
-    readonly zoomAndPan: number;
-}
-
-declare var SVGZoomAndPan: {
-    readonly SVG_ZOOMANDPAN_DISABLE: number;
-    readonly SVG_ZOOMANDPAN_MAGNIFY: number;
-    readonly SVG_ZOOMANDPAN_UNKNOWN: number;
-}
-
-interface SVGZoomEvent extends UIEvent {
-    readonly newScale: number;
-    readonly newTranslate: SVGPoint;
-    readonly previousScale: number;
-    readonly previousTranslate: SVGPoint;
-    readonly zoomRectScreen: SVGRect;
-}
-
-declare var SVGZoomEvent: {
-    prototype: SVGZoomEvent;
-    new(): SVGZoomEvent;
-}
-
-interface Screen extends EventTarget {
-    readonly availHeight: number;
-    readonly availWidth: number;
-    bufferDepth: number;
-    readonly colorDepth: number;
-    readonly deviceXDPI: number;
-    readonly deviceYDPI: number;
-    readonly fontSmoothingEnabled: boolean;
-    readonly height: number;
-    readonly logicalXDPI: number;
-    readonly logicalYDPI: number;
-    readonly msOrientation: string;
-    onmsorientationchange: (this: this, ev: Event) => any;
-    readonly pixelDepth: number;
-    readonly systemXDPI: number;
-    readonly systemYDPI: number;
-    readonly width: number;
-    msLockOrientation(orientations: string | string[]): boolean;
-    msUnlockOrientation(): void;
-    addEventListener(type: "MSOrientationChange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var Screen: {
-    prototype: Screen;
-    new(): Screen;
-}
-
-interface ScriptNotifyEvent extends Event {
-    readonly callingUri: string;
-    readonly value: string;
-}
-
-declare var ScriptNotifyEvent: {
-    prototype: ScriptNotifyEvent;
-    new(): ScriptNotifyEvent;
-}
-
-interface ScriptProcessorNode extends AudioNode {
-    readonly bufferSize: number;
-    onaudioprocess: (this: this, ev: AudioProcessingEvent) => any;
-    addEventListener(type: "audioprocess", listener: (this: this, ev: AudioProcessingEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var ScriptProcessorNode: {
-    prototype: ScriptProcessorNode;
-    new(): ScriptProcessorNode;
-}
-
-interface Selection {
-    readonly anchorNode: Node;
-    readonly anchorOffset: number;
-    readonly focusNode: Node;
-    readonly focusOffset: number;
-    readonly isCollapsed: boolean;
-    readonly rangeCount: number;
-    readonly type: string;
-    addRange(range: Range): void;
-    collapse(parentNode: Node, offset: number): void;
-    collapseToEnd(): void;
-    collapseToStart(): void;
-    containsNode(node: Node, partlyContained: boolean): boolean;
-    deleteFromDocument(): void;
-    empty(): void;
-    extend(newNode: Node, offset: number): void;
-    getRangeAt(index: number): Range;
-    removeAllRanges(): void;
-    removeRange(range: Range): void;
-    selectAllChildren(parentNode: Node): void;
-    setBaseAndExtent(baseNode: Node, baseOffset: number, extentNode: Node, extentOffset: number): void;
-    toString(): string;
-}
-
-declare var Selection: {
-    prototype: Selection;
-    new(): Selection;
-}
-
-interface SourceBuffer extends EventTarget {
-    appendWindowEnd: number;
-    appendWindowStart: number;
-    readonly audioTracks: AudioTrackList;
-    readonly buffered: TimeRanges;
-    mode: string;
-    timestampOffset: number;
-    readonly updating: boolean;
-    readonly videoTracks: VideoTrackList;
-    abort(): void;
-    appendBuffer(data: ArrayBuffer | ArrayBufferView): void;
-    appendStream(stream: MSStream, maxSize?: number): void;
-    remove(start: number, end: number): void;
-}
-
-declare var SourceBuffer: {
-    prototype: SourceBuffer;
-    new(): SourceBuffer;
-}
-
-interface SourceBufferList extends EventTarget {
-    readonly length: number;
-    item(index: number): SourceBuffer;
-    [index: number]: SourceBuffer;
-}
-
-declare var SourceBufferList: {
-    prototype: SourceBufferList;
-    new(): SourceBufferList;
-}
-
-interface StereoPannerNode extends AudioNode {
-    readonly pan: AudioParam;
-}
-
-declare var StereoPannerNode: {
-    prototype: StereoPannerNode;
-    new(): StereoPannerNode;
-}
-
-interface Storage {
-    readonly length: number;
-    clear(): void;
-    getItem(key: string): string | null;
-    key(index: number): string | null;
-    removeItem(key: string): void;
-    setItem(key: string, data: string): void;
-    [key: string]: any;
-    [index: number]: string;
-}
-
-declare var Storage: {
-    prototype: Storage;
-    new(): Storage;
-}
-
-interface StorageEvent extends Event {
-    readonly url: string;
-    key?: string;
-    oldValue?: string;
-    newValue?: string;
-    storageArea?: Storage;
-}
-
-declare var StorageEvent: {
-    prototype: StorageEvent;
-    new (type: string, eventInitDict?: StorageEventInit): StorageEvent;
-}
-
-interface StyleMedia {
-    readonly type: string;
-    matchMedium(mediaquery: string): boolean;
-}
-
-declare var StyleMedia: {
-    prototype: StyleMedia;
-    new(): StyleMedia;
-}
-
-interface StyleSheet {
-    disabled: boolean;
-    readonly href: string;
-    readonly media: MediaList;
-    readonly ownerNode: Node;
-    readonly parentStyleSheet: StyleSheet;
-    readonly title: string;
-    readonly type: string;
-}
-
-declare var StyleSheet: {
-    prototype: StyleSheet;
-    new(): StyleSheet;
-}
-
-interface StyleSheetList {
-    readonly length: number;
-    item(index?: number): StyleSheet;
-    [index: number]: StyleSheet;
-}
-
-declare var StyleSheetList: {
-    prototype: StyleSheetList;
-    new(): StyleSheetList;
-}
-
-interface StyleSheetPageList {
-    readonly length: number;
-    item(index: number): CSSPageRule;
-    [index: number]: CSSPageRule;
-}
-
-declare var StyleSheetPageList: {
-    prototype: StyleSheetPageList;
-    new(): StyleSheetPageList;
-}
-
-interface SubtleCrypto {
-    decrypt(algorithm: string | RsaOaepParams | AesCtrParams | AesCbcParams | AesCmacParams | AesGcmParams | AesCfbParams, key: CryptoKey, data: BufferSource): PromiseLike<ArrayBuffer>;
-    deriveBits(algorithm: string | EcdhKeyDeriveParams | DhKeyDeriveParams | ConcatParams | HkdfCtrParams | Pbkdf2Params, baseKey: CryptoKey, length: number): PromiseLike<ArrayBuffer>;
-    deriveKey(algorithm: string | EcdhKeyDeriveParams | DhKeyDeriveParams | ConcatParams | HkdfCtrParams | Pbkdf2Params, baseKey: CryptoKey, derivedKeyType: string | AesDerivedKeyParams | HmacImportParams | ConcatParams | HkdfCtrParams | Pbkdf2Params, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
-    digest(algorithm: AlgorithmIdentifier, data: BufferSource): PromiseLike<ArrayBuffer>;
-    encrypt(algorithm: string | RsaOaepParams | AesCtrParams | AesCbcParams | AesCmacParams | AesGcmParams | AesCfbParams, key: CryptoKey, data: BufferSource): PromiseLike<ArrayBuffer>;
-    exportKey(format: "jwk", key: CryptoKey): PromiseLike<JsonWebKey>;
-    exportKey(format: "raw" | "pkcs8" | "spki", key: CryptoKey): PromiseLike<ArrayBuffer>;
-    exportKey(format: string, key: CryptoKey): PromiseLike<JsonWebKey | ArrayBuffer>;
-    generateKey(algorithm: string, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKeyPair | CryptoKey>;
-    generateKey(algorithm: RsaHashedKeyGenParams | EcKeyGenParams | DhKeyGenParams, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKeyPair>;
-    generateKey(algorithm: AesKeyGenParams | HmacKeyGenParams | Pbkdf2Params, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
-    importKey(format: "jwk", keyData: JsonWebKey, algorithm: string | RsaHashedImportParams | EcKeyImportParams | HmacImportParams | DhImportKeyParams, extractable:boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
-    importKey(format: "raw" | "pkcs8" | "spki", keyData: BufferSource, algorithm: string | RsaHashedImportParams | EcKeyImportParams | HmacImportParams | DhImportKeyParams, extractable:boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
-    importKey(format: string, keyData: JsonWebKey | BufferSource, algorithm: string | RsaHashedImportParams | EcKeyImportParams | HmacImportParams | DhImportKeyParams, extractable:boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
-    sign(algorithm: string | RsaPssParams | EcdsaParams | AesCmacParams, key: CryptoKey, data: BufferSource): PromiseLike<ArrayBuffer>;
-    unwrapKey(format: string, wrappedKey: BufferSource, unwrappingKey: CryptoKey, unwrapAlgorithm: AlgorithmIdentifier, unwrappedKeyAlgorithm: AlgorithmIdentifier, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
-    verify(algorithm: string | RsaPssParams | EcdsaParams | AesCmacParams, key: CryptoKey, signature: BufferSource, data: BufferSource): PromiseLike<boolean>;
-    wrapKey(format: string, key: CryptoKey, wrappingKey: CryptoKey, wrapAlgorithm: AlgorithmIdentifier): PromiseLike<ArrayBuffer>;
-}
-
-declare var SubtleCrypto: {
-    prototype: SubtleCrypto;
-    new(): SubtleCrypto;
-}
-
-interface Text extends CharacterData {
-    readonly wholeText: string;
-    splitText(offset: number): Text;
-}
-
-declare var Text: {
-    prototype: Text;
-    new(): Text;
-}
-
-interface TextEvent extends UIEvent {
-    readonly data: string;
-    readonly inputMethod: number;
-    readonly locale: string;
-    initTextEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, dataArg: string, inputMethod: number, locale: string): void;
-    readonly DOM_INPUT_METHOD_DROP: number;
-    readonly DOM_INPUT_METHOD_HANDWRITING: number;
-    readonly DOM_INPUT_METHOD_IME: number;
-    readonly DOM_INPUT_METHOD_KEYBOARD: number;
-    readonly DOM_INPUT_METHOD_MULTIMODAL: number;
-    readonly DOM_INPUT_METHOD_OPTION: number;
-    readonly DOM_INPUT_METHOD_PASTE: number;
-    readonly DOM_INPUT_METHOD_SCRIPT: number;
-    readonly DOM_INPUT_METHOD_UNKNOWN: number;
-    readonly DOM_INPUT_METHOD_VOICE: number;
-}
-
-declare var TextEvent: {
-    prototype: TextEvent;
-    new(): TextEvent;
-    readonly DOM_INPUT_METHOD_DROP: number;
-    readonly DOM_INPUT_METHOD_HANDWRITING: number;
-    readonly DOM_INPUT_METHOD_IME: number;
-    readonly DOM_INPUT_METHOD_KEYBOARD: number;
-    readonly DOM_INPUT_METHOD_MULTIMODAL: number;
-    readonly DOM_INPUT_METHOD_OPTION: number;
-    readonly DOM_INPUT_METHOD_PASTE: number;
-    readonly DOM_INPUT_METHOD_SCRIPT: number;
-    readonly DOM_INPUT_METHOD_UNKNOWN: number;
-    readonly DOM_INPUT_METHOD_VOICE: number;
-}
-
-interface TextMetrics {
-    readonly width: number;
-}
-
-declare var TextMetrics: {
-    prototype: TextMetrics;
-    new(): TextMetrics;
-}
-
-interface TextTrack extends EventTarget {
-    readonly activeCues: TextTrackCueList;
-    readonly cues: TextTrackCueList;
-    readonly inBandMetadataTrackDispatchType: string;
-    readonly kind: string;
-    readonly label: string;
-    readonly language: string;
-    mode: any;
-    oncuechange: (this: this, ev: Event) => any;
-    onerror: (this: this, ev: ErrorEvent) => any;
-    onload: (this: this, ev: Event) => any;
-    readonly readyState: number;
-    addCue(cue: TextTrackCue): void;
-    removeCue(cue: TextTrackCue): void;
-    readonly DISABLED: number;
-    readonly ERROR: number;
-    readonly HIDDEN: number;
-    readonly LOADED: number;
-    readonly LOADING: number;
-    readonly NONE: number;
-    readonly SHOWING: number;
-    addEventListener(type: "cuechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var TextTrack: {
-    prototype: TextTrack;
-    new(): TextTrack;
-    readonly DISABLED: number;
-    readonly ERROR: number;
-    readonly HIDDEN: number;
-    readonly LOADED: number;
-    readonly LOADING: number;
-    readonly NONE: number;
-    readonly SHOWING: number;
-}
-
-interface TextTrackCue extends EventTarget {
-    endTime: number;
-    id: string;
-    onenter: (this: this, ev: Event) => any;
-    onexit: (this: this, ev: Event) => any;
-    pauseOnExit: boolean;
-    startTime: number;
-    text: string;
-    readonly track: TextTrack;
-    getCueAsHTML(): DocumentFragment;
-    addEventListener(type: "enter", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "exit", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var TextTrackCue: {
-    prototype: TextTrackCue;
-    new(startTime: number, endTime: number, text: string): TextTrackCue;
-}
-
-interface TextTrackCueList {
-    readonly length: number;
-    getCueById(id: string): TextTrackCue;
-    item(index: number): TextTrackCue;
-    [index: number]: TextTrackCue;
-}
-
-declare var TextTrackCueList: {
-    prototype: TextTrackCueList;
-    new(): TextTrackCueList;
-}
-
-interface TextTrackList extends EventTarget {
-    readonly length: number;
-    onaddtrack: ((this: this, ev: TrackEvent) => any) | null;
-    item(index: number): TextTrack;
-    addEventListener(type: "addtrack", listener: (this: this, ev: TrackEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-    [index: number]: TextTrack;
-}
-
-declare var TextTrackList: {
-    prototype: TextTrackList;
-    new(): TextTrackList;
-}
-
-interface TimeRanges {
-    readonly length: number;
-    end(index: number): number;
-    start(index: number): number;
-}
-
-declare var TimeRanges: {
-    prototype: TimeRanges;
-    new(): TimeRanges;
-}
-
-interface Touch {
-    readonly clientX: number;
-    readonly clientY: number;
-    readonly identifier: number;
-    readonly pageX: number;
-    readonly pageY: number;
-    readonly screenX: number;
-    readonly screenY: number;
-    readonly target: EventTarget;
-}
-
-declare var Touch: {
-    prototype: Touch;
-    new(): Touch;
-}
-
-interface TouchEvent extends UIEvent {
-    readonly altKey: boolean;
-    readonly changedTouches: TouchList;
-    readonly ctrlKey: boolean;
-    readonly metaKey: boolean;
-    readonly shiftKey: boolean;
-    readonly targetTouches: TouchList;
-    readonly touches: TouchList;
-}
-
-declare var TouchEvent: {
-    prototype: TouchEvent;
-    new(): TouchEvent;
-}
-
-interface TouchList {
-    readonly length: number;
-    item(index: number): Touch | null;
-    [index: number]: Touch;
-}
-
-declare var TouchList: {
-    prototype: TouchList;
-    new(): TouchList;
-}
-
-interface TrackEvent extends Event {
-    readonly track: any;
-}
-
-declare var TrackEvent: {
-    prototype: TrackEvent;
-    new(): TrackEvent;
-}
-
-interface TransitionEvent extends Event {
-    readonly elapsedTime: number;
-    readonly propertyName: string;
-    initTransitionEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, propertyNameArg: string, elapsedTimeArg: number): void;
-}
-
-declare var TransitionEvent: {
-    prototype: TransitionEvent;
-    new(): TransitionEvent;
-}
-
-interface TreeWalker {
-    currentNode: Node;
-    readonly expandEntityReferences: boolean;
-    readonly filter: NodeFilter;
-    readonly root: Node;
-    readonly whatToShow: number;
-    firstChild(): Node;
-    lastChild(): Node;
-    nextNode(): Node;
-    nextSibling(): Node;
-    parentNode(): Node;
-    previousNode(): Node;
-    previousSibling(): Node;
-}
-
-declare var TreeWalker: {
-    prototype: TreeWalker;
-    new(): TreeWalker;
-}
-
-interface UIEvent extends Event {
-    readonly detail: number;
-    readonly view: Window;
-    initUIEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number): void;
-}
-
-declare var UIEvent: {
-    prototype: UIEvent;
-    new(type: string, eventInitDict?: UIEventInit): UIEvent;
-}
-
-interface URL {
-    hash: string;
-    host: string;
-    hostname: string;
-    href: string;
-    readonly origin: string;
-    password: string;
-    pathname: string;
-    port: string;
-    protocol: string;
-    search: string;
-    username: string;
-    toString(): string;
-}
-
-declare var URL: {
-    prototype: URL;
-    new(url: string, base?: string): URL;
-    createObjectURL(object: any, options?: ObjectURLOptions): string;
-    revokeObjectURL(url: string): void;
-}
-
-interface UnviewableContentIdentifiedEvent extends NavigationEventWithReferrer {
-    readonly mediaType: string;
-}
-
-declare var UnviewableContentIdentifiedEvent: {
-    prototype: UnviewableContentIdentifiedEvent;
-    new(): UnviewableContentIdentifiedEvent;
-}
-
-interface ValidityState {
-    readonly badInput: boolean;
-    readonly customError: boolean;
-    readonly patternMismatch: boolean;
-    readonly rangeOverflow: boolean;
-    readonly rangeUnderflow: boolean;
-    readonly stepMismatch: boolean;
-    readonly tooLong: boolean;
-    readonly typeMismatch: boolean;
-    readonly valid: boolean;
-    readonly valueMissing: boolean;
-}
-
-declare var ValidityState: {
-    prototype: ValidityState;
-    new(): ValidityState;
-}
-
-interface VideoPlaybackQuality {
-    readonly corruptedVideoFrames: number;
-    readonly creationTime: number;
-    readonly droppedVideoFrames: number;
-    readonly totalFrameDelay: number;
-    readonly totalVideoFrames: number;
-}
-
-declare var VideoPlaybackQuality: {
-    prototype: VideoPlaybackQuality;
-    new(): VideoPlaybackQuality;
-}
-
-interface VideoTrack {
-    readonly id: string;
-    kind: string;
-    readonly label: string;
-    language: string;
-    selected: boolean;
-    readonly sourceBuffer: SourceBuffer;
-}
-
-declare var VideoTrack: {
-    prototype: VideoTrack;
-    new(): VideoTrack;
-}
-
-interface VideoTrackList extends EventTarget {
-    readonly length: number;
-    onaddtrack: (this: this, ev: TrackEvent) => any;
-    onchange: (this: this, ev: Event) => any;
-    onremovetrack: (this: this, ev: TrackEvent) => any;
-    readonly selectedIndex: number;
-    getTrackById(id: string): VideoTrack | null;
-    item(index: number): VideoTrack;
-    addEventListener(type: "addtrack", listener: (this: this, ev: TrackEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "change", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "removetrack", listener: (this: this, ev: TrackEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-    [index: number]: VideoTrack;
-}
-
-declare var VideoTrackList: {
-    prototype: VideoTrackList;
-    new(): VideoTrackList;
-}
-
-interface WEBGL_compressed_texture_s3tc {
-    readonly COMPRESSED_RGBA_S3TC_DXT1_EXT: number;
-    readonly COMPRESSED_RGBA_S3TC_DXT3_EXT: number;
-    readonly COMPRESSED_RGBA_S3TC_DXT5_EXT: number;
-    readonly COMPRESSED_RGB_S3TC_DXT1_EXT: number;
-}
-
-declare var WEBGL_compressed_texture_s3tc: {
-    prototype: WEBGL_compressed_texture_s3tc;
-    new(): WEBGL_compressed_texture_s3tc;
-    readonly COMPRESSED_RGBA_S3TC_DXT1_EXT: number;
-    readonly COMPRESSED_RGBA_S3TC_DXT3_EXT: number;
-    readonly COMPRESSED_RGBA_S3TC_DXT5_EXT: number;
-    readonly COMPRESSED_RGB_S3TC_DXT1_EXT: number;
-}
-
-interface WEBGL_debug_renderer_info {
-    readonly UNMASKED_RENDERER_WEBGL: number;
-    readonly UNMASKED_VENDOR_WEBGL: number;
-}
-
-declare var WEBGL_debug_renderer_info: {
-    prototype: WEBGL_debug_renderer_info;
-    new(): WEBGL_debug_renderer_info;
-    readonly UNMASKED_RENDERER_WEBGL: number;
-    readonly UNMASKED_VENDOR_WEBGL: number;
-}
-
-interface WEBGL_depth_texture {
-    readonly UNSIGNED_INT_24_8_WEBGL: number;
-}
-
-declare var WEBGL_depth_texture: {
-    prototype: WEBGL_depth_texture;
-    new(): WEBGL_depth_texture;
-    readonly UNSIGNED_INT_24_8_WEBGL: number;
-}
-
-interface WaveShaperNode extends AudioNode {
-    curve: Float32Array | null;
-    oversample: string;
-}
-
-declare var WaveShaperNode: {
-    prototype: WaveShaperNode;
-    new(): WaveShaperNode;
-}
-
-interface WebGLActiveInfo {
-    readonly name: string;
-    readonly size: number;
-    readonly type: number;
-}
-
-declare var WebGLActiveInfo: {
-    prototype: WebGLActiveInfo;
-    new(): WebGLActiveInfo;
-}
-
-interface WebGLBuffer extends WebGLObject {
-}
-
-declare var WebGLBuffer: {
-    prototype: WebGLBuffer;
-    new(): WebGLBuffer;
-}
-
-interface WebGLContextEvent extends Event {
-    readonly statusMessage: string;
-}
-
-declare var WebGLContextEvent: {
-    prototype: WebGLContextEvent;
-    new(type: string, eventInitDict?: WebGLContextEventInit): WebGLContextEvent;
-}
-
-interface WebGLFramebuffer extends WebGLObject {
-}
-
-declare var WebGLFramebuffer: {
-    prototype: WebGLFramebuffer;
-    new(): WebGLFramebuffer;
-}
-
-interface WebGLObject {
-}
-
-declare var WebGLObject: {
-    prototype: WebGLObject;
-    new(): WebGLObject;
-}
-
-interface WebGLProgram extends WebGLObject {
-}
-
-declare var WebGLProgram: {
-    prototype: WebGLProgram;
-    new(): WebGLProgram;
-}
-
-interface WebGLRenderbuffer extends WebGLObject {
-}
-
-declare var WebGLRenderbuffer: {
-    prototype: WebGLRenderbuffer;
-    new(): WebGLRenderbuffer;
-}
-
-interface WebGLRenderingContext {
-    readonly canvas: HTMLCanvasElement;
-    readonly drawingBufferHeight: number;
-    readonly drawingBufferWidth: number;
-    activeTexture(texture: number): void;
-    attachShader(program: WebGLProgram | null, shader: WebGLShader | null): void;
-    bindAttribLocation(program: WebGLProgram | null, index: number, name: string): void;
-    bindBuffer(target: number, buffer: WebGLBuffer | null): void;
-    bindFramebuffer(target: number, framebuffer: WebGLFramebuffer | null): void;
-    bindRenderbuffer(target: number, renderbuffer: WebGLRenderbuffer | null): void;
-    bindTexture(target: number, texture: WebGLTexture | null): void;
-    blendColor(red: number, green: number, blue: number, alpha: number): void;
-    blendEquation(mode: number): void;
-    blendEquationSeparate(modeRGB: number, modeAlpha: number): void;
-    blendFunc(sfactor: number, dfactor: number): void;
-    blendFuncSeparate(srcRGB: number, dstRGB: number, srcAlpha: number, dstAlpha: number): void;
-    bufferData(target: number, size: number | ArrayBufferView | ArrayBuffer, usage: number): void;
-    bufferSubData(target: number, offset: number, data: ArrayBufferView | ArrayBuffer): void;
-    checkFramebufferStatus(target: number): number;
-    clear(mask: number): void;
-    clearColor(red: number, green: number, blue: number, alpha: number): void;
-    clearDepth(depth: number): void;
-    clearStencil(s: number): void;
-    colorMask(red: boolean, green: boolean, blue: boolean, alpha: boolean): void;
-    compileShader(shader: WebGLShader | null): void;
-    compressedTexImage2D(target: number, level: number, internalformat: number, width: number, height: number, border: number, data: ArrayBufferView): void;
-    compressedTexSubImage2D(target: number, level: number, xoffset: number, yoffset: number, width: number, height: number, format: number, data: ArrayBufferView): void;
-    copyTexImage2D(target: number, level: number, internalformat: number, x: number, y: number, width: number, height: number, border: number): void;
-    copyTexSubImage2D(target: number, level: number, xoffset: number, yoffset: number, x: number, y: number, width: number, height: number): void;
-    createBuffer(): WebGLBuffer | null;
-    createFramebuffer(): WebGLFramebuffer | null;
-    createProgram(): WebGLProgram | null;
-    createRenderbuffer(): WebGLRenderbuffer | null;
-    createShader(type: number): WebGLShader | null;
-    createTexture(): WebGLTexture | null;
-    cullFace(mode: number): void;
-    deleteBuffer(buffer: WebGLBuffer | null): void;
-    deleteFramebuffer(framebuffer: WebGLFramebuffer | null): void;
-    deleteProgram(program: WebGLProgram | null): void;
-    deleteRenderbuffer(renderbuffer: WebGLRenderbuffer | null): void;
-    deleteShader(shader: WebGLShader | null): void;
-    deleteTexture(texture: WebGLTexture | null): void;
-    depthFunc(func: number): void;
-    depthMask(flag: boolean): void;
-    depthRange(zNear: number, zFar: number): void;
-    detachShader(program: WebGLProgram | null, shader: WebGLShader | null): void;
-    disable(cap: number): void;
-    disableVertexAttribArray(index: number): void;
-    drawArrays(mode: number, first: number, count: number): void;
-    drawElements(mode: number, count: number, type: number, offset: number): void;
-    enable(cap: number): void;
-    enableVertexAttribArray(index: number): void;
-    finish(): void;
-    flush(): void;
-    framebufferRenderbuffer(target: number, attachment: number, renderbuffertarget: number, renderbuffer: WebGLRenderbuffer | null): void;
-    framebufferTexture2D(target: number, attachment: number, textarget: number, texture: WebGLTexture | null, level: number): void;
-    frontFace(mode: number): void;
-    generateMipmap(target: number): void;
-    getActiveAttrib(program: WebGLProgram | null, index: number): WebGLActiveInfo | null;
-    getActiveUniform(program: WebGLProgram | null, index: number): WebGLActiveInfo | null;
-    getAttachedShaders(program: WebGLProgram | null): WebGLShader[] | null;
-    getAttribLocation(program: WebGLProgram | null, name: string): number;
-    getBufferParameter(target: number, pname: number): any;
-    getContextAttributes(): WebGLContextAttributes;
-    getError(): number;
-    getExtension(name: string): any;
-    getFramebufferAttachmentParameter(target: number, attachment: number, pname: number): any;
-    getParameter(pname: number): any;
-    getProgramInfoLog(program: WebGLProgram | null): string | null;
-    getProgramParameter(program: WebGLProgram | null, pname: number): any;
-    getRenderbufferParameter(target: number, pname: number): any;
-    getShaderInfoLog(shader: WebGLShader | null): string | null;
-    getShaderParameter(shader: WebGLShader | null, pname: number): any;
-    getShaderPrecisionFormat(shadertype: number, precisiontype: number): WebGLShaderPrecisionFormat | null;
-    getShaderSource(shader: WebGLShader | null): string | null;
-    getSupportedExtensions(): string[] | null;
-    getTexParameter(target: number, pname: number): any;
-    getUniform(program: WebGLProgram | null, location: WebGLUniformLocation | null): any;
-    getUniformLocation(program: WebGLProgram | null, name: string): WebGLUniformLocation | null;
-    getVertexAttrib(index: number, pname: number): any;
-    getVertexAttribOffset(index: number, pname: number): number;
-    hint(target: number, mode: number): void;
-    isBuffer(buffer: WebGLBuffer | null): boolean;
-    isContextLost(): boolean;
-    isEnabled(cap: number): boolean;
-    isFramebuffer(framebuffer: WebGLFramebuffer | null): boolean;
-    isProgram(program: WebGLProgram | null): boolean;
-    isRenderbuffer(renderbuffer: WebGLRenderbuffer | null): boolean;
-    isShader(shader: WebGLShader | null): boolean;
-    isTexture(texture: WebGLTexture | null): boolean;
-    lineWidth(width: number): void;
-    linkProgram(program: WebGLProgram | null): void;
-    pixelStorei(pname: number, param: number): void;
-    polygonOffset(factor: number, units: number): void;
-    readPixels(x: number, y: number, width: number, height: number, format: number, type: number, pixels: ArrayBufferView | null): void;
-    renderbufferStorage(target: number, internalformat: number, width: number, height: number): void;
-    sampleCoverage(value: number, invert: boolean): void;
-    scissor(x: number, y: number, width: number, height: number): void;
-    shaderSource(shader: WebGLShader | null, source: string): void;
-    stencilFunc(func: number, ref: number, mask: number): void;
-    stencilFuncSeparate(face: number, func: number, ref: number, mask: number): void;
-    stencilMask(mask: number): void;
-    stencilMaskSeparate(face: number, mask: number): void;
-    stencilOp(fail: number, zfail: number, zpass: number): void;
-    stencilOpSeparate(face: number, fail: number, zfail: number, zpass: number): void;
-    texImage2D(target: number, level: number, internalformat: number, width: number, height: number, border: number, format: number, type: number, pixels?: ArrayBufferView): void;
-    texImage2D(target: number, level: number, internalformat: number, format: number, type: number, pixels?: ImageData | HTMLVideoElement | HTMLImageElement | HTMLCanvasElement): void;
-    texParameterf(target: number, pname: number, param: number): void;
-    texParameteri(target: number, pname: number, param: number): void;
-    texSubImage2D(target: number, level: number, xoffset: number, yoffset: number, width: number, height: number, format: number, type: number, pixels?: ArrayBufferView): void;
-    texSubImage2D(target: number, level: number, xoffset: number, yoffset: number, format: number, type: number, pixels?: ImageData | HTMLVideoElement | HTMLImageElement | HTMLCanvasElement): void;
-    uniform1f(location: WebGLUniformLocation | null, x: number): void;
-    uniform1fv(location: WebGLUniformLocation, v: Float32Array | number[]): void;
-    uniform1i(location: WebGLUniformLocation | null, x: number): void;
-    uniform1iv(location: WebGLUniformLocation, v: Int32Array | number[]): void;
-    uniform2f(location: WebGLUniformLocation | null, x: number, y: number): void;
-    uniform2fv(location: WebGLUniformLocation, v: Float32Array | number[]): void;
-    uniform2i(location: WebGLUniformLocation | null, x: number, y: number): void;
-    uniform2iv(location: WebGLUniformLocation, v: Int32Array | number[]): void;
-    uniform3f(location: WebGLUniformLocation | null, x: number, y: number, z: number): void;
-    uniform3fv(location: WebGLUniformLocation, v: Float32Array | number[]): void;
-    uniform3i(location: WebGLUniformLocation | null, x: number, y: number, z: number): void;
-    uniform3iv(location: WebGLUniformLocation, v: Int32Array | number[]): void;
-    uniform4f(location: WebGLUniformLocation | null, x: number, y: number, z: number, w: number): void;
-    uniform4fv(location: WebGLUniformLocation, v: Float32Array | number[]): void;
-    uniform4i(location: WebGLUniformLocation | null, x: number, y: number, z: number, w: number): void;
-    uniform4iv(location: WebGLUniformLocation, v: Int32Array | number[]): void;
-    uniformMatrix2fv(location: WebGLUniformLocation, transpose: boolean, value: Float32Array | number[]): void;
-    uniformMatrix3fv(location: WebGLUniformLocation, transpose: boolean, value: Float32Array | number[]): void;
-    uniformMatrix4fv(location: WebGLUniformLocation, transpose: boolean, value: Float32Array | number[]): void;
-    useProgram(program: WebGLProgram | null): void;
-    validateProgram(program: WebGLProgram | null): void;
-    vertexAttrib1f(indx: number, x: number): void;
-    vertexAttrib1fv(indx: number, values: Float32Array | number[]): void;
-    vertexAttrib2f(indx: number, x: number, y: number): void;
-    vertexAttrib2fv(indx: number, values: Float32Array | number[]): void;
-    vertexAttrib3f(indx: number, x: number, y: number, z: number): void;
-    vertexAttrib3fv(indx: number, values: Float32Array | number[]): void;
-    vertexAttrib4f(indx: number, x: number, y: number, z: number, w: number): void;
-    vertexAttrib4fv(indx: number, values: Float32Array | number[]): void;
-    vertexAttribPointer(indx: number, size: number, type: number, normalized: boolean, stride: number, offset: number): void;
-    viewport(x: number, y: number, width: number, height: number): void;
-    readonly ACTIVE_ATTRIBUTES: number;
-    readonly ACTIVE_TEXTURE: number;
-    readonly ACTIVE_UNIFORMS: number;
-    readonly ALIASED_LINE_WIDTH_RANGE: number;
-    readonly ALIASED_POINT_SIZE_RANGE: number;
-    readonly ALPHA: number;
-    readonly ALPHA_BITS: number;
-    readonly ALWAYS: number;
-    readonly ARRAY_BUFFER: number;
-    readonly ARRAY_BUFFER_BINDING: number;
-    readonly ATTACHED_SHADERS: number;
-    readonly BACK: number;
-    readonly BLEND: number;
-    readonly BLEND_COLOR: number;
-    readonly BLEND_DST_ALPHA: number;
-    readonly BLEND_DST_RGB: number;
-    readonly BLEND_EQUATION: number;
-    readonly BLEND_EQUATION_ALPHA: number;
-    readonly BLEND_EQUATION_RGB: number;
-    readonly BLEND_SRC_ALPHA: number;
-    readonly BLEND_SRC_RGB: number;
-    readonly BLUE_BITS: number;
-    readonly BOOL: number;
-    readonly BOOL_VEC2: number;
-    readonly BOOL_VEC3: number;
-    readonly BOOL_VEC4: number;
-    readonly BROWSER_DEFAULT_WEBGL: number;
-    readonly BUFFER_SIZE: number;
-    readonly BUFFER_USAGE: number;
-    readonly BYTE: number;
-    readonly CCW: number;
-    readonly CLAMP_TO_EDGE: number;
-    readonly COLOR_ATTACHMENT0: number;
-    readonly COLOR_BUFFER_BIT: number;
-    readonly COLOR_CLEAR_VALUE: number;
-    readonly COLOR_WRITEMASK: number;
-    readonly COMPILE_STATUS: number;
-    readonly COMPRESSED_TEXTURE_FORMATS: number;
-    readonly CONSTANT_ALPHA: number;
-    readonly CONSTANT_COLOR: number;
-    readonly CONTEXT_LOST_WEBGL: number;
-    readonly CULL_FACE: number;
-    readonly CULL_FACE_MODE: number;
-    readonly CURRENT_PROGRAM: number;
-    readonly CURRENT_VERTEX_ATTRIB: number;
-    readonly CW: number;
-    readonly DECR: number;
-    readonly DECR_WRAP: number;
-    readonly DELETE_STATUS: number;
-    readonly DEPTH_ATTACHMENT: number;
-    readonly DEPTH_BITS: number;
-    readonly DEPTH_BUFFER_BIT: number;
-    readonly DEPTH_CLEAR_VALUE: number;
-    readonly DEPTH_COMPONENT: number;
-    readonly DEPTH_COMPONENT16: number;
-    readonly DEPTH_FUNC: number;
-    readonly DEPTH_RANGE: number;
-    readonly DEPTH_STENCIL: number;
-    readonly DEPTH_STENCIL_ATTACHMENT: number;
-    readonly DEPTH_TEST: number;
-    readonly DEPTH_WRITEMASK: number;
-    readonly DITHER: number;
-    readonly DONT_CARE: number;
-    readonly DST_ALPHA: number;
-    readonly DST_COLOR: number;
-    readonly DYNAMIC_DRAW: number;
-    readonly ELEMENT_ARRAY_BUFFER: number;
-    readonly ELEMENT_ARRAY_BUFFER_BINDING: number;
-    readonly EQUAL: number;
-    readonly FASTEST: number;
-    readonly FLOAT: number;
-    readonly FLOAT_MAT2: number;
-    readonly FLOAT_MAT3: number;
-    readonly FLOAT_MAT4: number;
-    readonly FLOAT_VEC2: number;
-    readonly FLOAT_VEC3: number;
-    readonly FLOAT_VEC4: number;
-    readonly FRAGMENT_SHADER: number;
-    readonly FRAMEBUFFER: number;
-    readonly FRAMEBUFFER_ATTACHMENT_OBJECT_NAME: number;
-    readonly FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE: number;
-    readonly FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE: number;
-    readonly FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL: number;
-    readonly FRAMEBUFFER_BINDING: number;
-    readonly FRAMEBUFFER_COMPLETE: number;
-    readonly FRAMEBUFFER_INCOMPLETE_ATTACHMENT: number;
-    readonly FRAMEBUFFER_INCOMPLETE_DIMENSIONS: number;
-    readonly FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT: number;
-    readonly FRAMEBUFFER_UNSUPPORTED: number;
-    readonly FRONT: number;
-    readonly FRONT_AND_BACK: number;
-    readonly FRONT_FACE: number;
-    readonly FUNC_ADD: number;
-    readonly FUNC_REVERSE_SUBTRACT: number;
-    readonly FUNC_SUBTRACT: number;
-    readonly GENERATE_MIPMAP_HINT: number;
-    readonly GEQUAL: number;
-    readonly GREATER: number;
-    readonly GREEN_BITS: number;
-    readonly HIGH_FLOAT: number;
-    readonly HIGH_INT: number;
-    readonly IMPLEMENTATION_COLOR_READ_FORMAT: number;
-    readonly IMPLEMENTATION_COLOR_READ_TYPE: number;
-    readonly INCR: number;
-    readonly INCR_WRAP: number;
-    readonly INT: number;
-    readonly INT_VEC2: number;
-    readonly INT_VEC3: number;
-    readonly INT_VEC4: number;
-    readonly INVALID_ENUM: number;
-    readonly INVALID_FRAMEBUFFER_OPERATION: number;
-    readonly INVALID_OPERATION: number;
-    readonly INVALID_VALUE: number;
-    readonly INVERT: number;
-    readonly KEEP: number;
-    readonly LEQUAL: number;
-    readonly LESS: number;
-    readonly LINEAR: number;
-    readonly LINEAR_MIPMAP_LINEAR: number;
-    readonly LINEAR_MIPMAP_NEAREST: number;
-    readonly LINES: number;
-    readonly LINE_LOOP: number;
-    readonly LINE_STRIP: number;
-    readonly LINE_WIDTH: number;
-    readonly LINK_STATUS: number;
-    readonly LOW_FLOAT: number;
-    readonly LOW_INT: number;
-    readonly LUMINANCE: number;
-    readonly LUMINANCE_ALPHA: number;
-    readonly MAX_COMBINED_TEXTURE_IMAGE_UNITS: number;
-    readonly MAX_CUBE_MAP_TEXTURE_SIZE: number;
-    readonly MAX_FRAGMENT_UNIFORM_VECTORS: number;
-    readonly MAX_RENDERBUFFER_SIZE: number;
-    readonly MAX_TEXTURE_IMAGE_UNITS: number;
-    readonly MAX_TEXTURE_SIZE: number;
-    readonly MAX_VARYING_VECTORS: number;
-    readonly MAX_VERTEX_ATTRIBS: number;
-    readonly MAX_VERTEX_TEXTURE_IMAGE_UNITS: number;
-    readonly MAX_VERTEX_UNIFORM_VECTORS: number;
-    readonly MAX_VIEWPORT_DIMS: number;
-    readonly MEDIUM_FLOAT: number;
-    readonly MEDIUM_INT: number;
-    readonly MIRRORED_REPEAT: number;
-    readonly NEAREST: number;
-    readonly NEAREST_MIPMAP_LINEAR: number;
-    readonly NEAREST_MIPMAP_NEAREST: number;
-    readonly NEVER: number;
-    readonly NICEST: number;
-    readonly NONE: number;
-    readonly NOTEQUAL: number;
-    readonly NO_ERROR: number;
-    readonly ONE: number;
-    readonly ONE_MINUS_CONSTANT_ALPHA: number;
-    readonly ONE_MINUS_CONSTANT_COLOR: number;
-    readonly ONE_MINUS_DST_ALPHA: number;
-    readonly ONE_MINUS_DST_COLOR: number;
-    readonly ONE_MINUS_SRC_ALPHA: number;
-    readonly ONE_MINUS_SRC_COLOR: number;
-    readonly OUT_OF_MEMORY: number;
-    readonly PACK_ALIGNMENT: number;
-    readonly POINTS: number;
-    readonly POLYGON_OFFSET_FACTOR: number;
-    readonly POLYGON_OFFSET_FILL: number;
-    readonly POLYGON_OFFSET_UNITS: number;
-    readonly RED_BITS: number;
-    readonly RENDERBUFFER: number;
-    readonly RENDERBUFFER_ALPHA_SIZE: number;
-    readonly RENDERBUFFER_BINDING: number;
-    readonly RENDERBUFFER_BLUE_SIZE: number;
-    readonly RENDERBUFFER_DEPTH_SIZE: number;
-    readonly RENDERBUFFER_GREEN_SIZE: number;
-    readonly RENDERBUFFER_HEIGHT: number;
-    readonly RENDERBUFFER_INTERNAL_FORMAT: number;
-    readonly RENDERBUFFER_RED_SIZE: number;
-    readonly RENDERBUFFER_STENCIL_SIZE: number;
-    readonly RENDERBUFFER_WIDTH: number;
-    readonly RENDERER: number;
-    readonly REPEAT: number;
-    readonly REPLACE: number;
-    readonly RGB: number;
-    readonly RGB565: number;
-    readonly RGB5_A1: number;
-    readonly RGBA: number;
-    readonly RGBA4: number;
-    readonly SAMPLER_2D: number;
-    readonly SAMPLER_CUBE: number;
-    readonly SAMPLES: number;
-    readonly SAMPLE_ALPHA_TO_COVERAGE: number;
-    readonly SAMPLE_BUFFERS: number;
-    readonly SAMPLE_COVERAGE: number;
-    readonly SAMPLE_COVERAGE_INVERT: number;
-    readonly SAMPLE_COVERAGE_VALUE: number;
-    readonly SCISSOR_BOX: number;
-    readonly SCISSOR_TEST: number;
-    readonly SHADER_TYPE: number;
-    readonly SHADING_LANGUAGE_VERSION: number;
-    readonly SHORT: number;
-    readonly SRC_ALPHA: number;
-    readonly SRC_ALPHA_SATURATE: number;
-    readonly SRC_COLOR: number;
-    readonly STATIC_DRAW: number;
-    readonly STENCIL_ATTACHMENT: number;
-    readonly STENCIL_BACK_FAIL: number;
-    readonly STENCIL_BACK_FUNC: number;
-    readonly STENCIL_BACK_PASS_DEPTH_FAIL: number;
-    readonly STENCIL_BACK_PASS_DEPTH_PASS: number;
-    readonly STENCIL_BACK_REF: number;
-    readonly STENCIL_BACK_VALUE_MASK: number;
-    readonly STENCIL_BACK_WRITEMASK: number;
-    readonly STENCIL_BITS: number;
-    readonly STENCIL_BUFFER_BIT: number;
-    readonly STENCIL_CLEAR_VALUE: number;
-    readonly STENCIL_FAIL: number;
-    readonly STENCIL_FUNC: number;
-    readonly STENCIL_INDEX: number;
-    readonly STENCIL_INDEX8: number;
-    readonly STENCIL_PASS_DEPTH_FAIL: number;
-    readonly STENCIL_PASS_DEPTH_PASS: number;
-    readonly STENCIL_REF: number;
-    readonly STENCIL_TEST: number;
-    readonly STENCIL_VALUE_MASK: number;
-    readonly STENCIL_WRITEMASK: number;
-    readonly STREAM_DRAW: number;
-    readonly SUBPIXEL_BITS: number;
-    readonly TEXTURE: number;
-    readonly TEXTURE0: number;
-    readonly TEXTURE1: number;
-    readonly TEXTURE10: number;
-    readonly TEXTURE11: number;
-    readonly TEXTURE12: number;
-    readonly TEXTURE13: number;
-    readonly TEXTURE14: number;
-    readonly TEXTURE15: number;
-    readonly TEXTURE16: number;
-    readonly TEXTURE17: number;
-    readonly TEXTURE18: number;
-    readonly TEXTURE19: number;
-    readonly TEXTURE2: number;
-    readonly TEXTURE20: number;
-    readonly TEXTURE21: number;
-    readonly TEXTURE22: number;
-    readonly TEXTURE23: number;
-    readonly TEXTURE24: number;
-    readonly TEXTURE25: number;
-    readonly TEXTURE26: number;
-    readonly TEXTURE27: number;
-    readonly TEXTURE28: number;
-    readonly TEXTURE29: number;
-    readonly TEXTURE3: number;
-    readonly TEXTURE30: number;
-    readonly TEXTURE31: number;
-    readonly TEXTURE4: number;
-    readonly TEXTURE5: number;
-    readonly TEXTURE6: number;
-    readonly TEXTURE7: number;
-    readonly TEXTURE8: number;
-    readonly TEXTURE9: number;
-    readonly TEXTURE_2D: number;
-    readonly TEXTURE_BINDING_2D: number;
-    readonly TEXTURE_BINDING_CUBE_MAP: number;
-    readonly TEXTURE_CUBE_MAP: number;
-    readonly TEXTURE_CUBE_MAP_NEGATIVE_X: number;
-    readonly TEXTURE_CUBE_MAP_NEGATIVE_Y: number;
-    readonly TEXTURE_CUBE_MAP_NEGATIVE_Z: number;
-    readonly TEXTURE_CUBE_MAP_POSITIVE_X: number;
-    readonly TEXTURE_CUBE_MAP_POSITIVE_Y: number;
-    readonly TEXTURE_CUBE_MAP_POSITIVE_Z: number;
-    readonly TEXTURE_MAG_FILTER: number;
-    readonly TEXTURE_MIN_FILTER: number;
-    readonly TEXTURE_WRAP_S: number;
-    readonly TEXTURE_WRAP_T: number;
-    readonly TRIANGLES: number;
-    readonly TRIANGLE_FAN: number;
-    readonly TRIANGLE_STRIP: number;
-    readonly UNPACK_ALIGNMENT: number;
-    readonly UNPACK_COLORSPACE_CONVERSION_WEBGL: number;
-    readonly UNPACK_FLIP_Y_WEBGL: number;
-    readonly UNPACK_PREMULTIPLY_ALPHA_WEBGL: number;
-    readonly UNSIGNED_BYTE: number;
-    readonly UNSIGNED_INT: number;
-    readonly UNSIGNED_SHORT: number;
-    readonly UNSIGNED_SHORT_4_4_4_4: number;
-    readonly UNSIGNED_SHORT_5_5_5_1: number;
-    readonly UNSIGNED_SHORT_5_6_5: number;
-    readonly VALIDATE_STATUS: number;
-    readonly VENDOR: number;
-    readonly VERSION: number;
-    readonly VERTEX_ATTRIB_ARRAY_BUFFER_BINDING: number;
-    readonly VERTEX_ATTRIB_ARRAY_ENABLED: number;
-    readonly VERTEX_ATTRIB_ARRAY_NORMALIZED: number;
-    readonly VERTEX_ATTRIB_ARRAY_POINTER: number;
-    readonly VERTEX_ATTRIB_ARRAY_SIZE: number;
-    readonly VERTEX_ATTRIB_ARRAY_STRIDE: number;
-    readonly VERTEX_ATTRIB_ARRAY_TYPE: number;
-    readonly VERTEX_SHADER: number;
-    readonly VIEWPORT: number;
-    readonly ZERO: number;
-}
-
-declare var WebGLRenderingContext: {
-    prototype: WebGLRenderingContext;
-    new(): WebGLRenderingContext;
-    readonly ACTIVE_ATTRIBUTES: number;
-    readonly ACTIVE_TEXTURE: number;
-    readonly ACTIVE_UNIFORMS: number;
-    readonly ALIASED_LINE_WIDTH_RANGE: number;
-    readonly ALIASED_POINT_SIZE_RANGE: number;
-    readonly ALPHA: number;
-    readonly ALPHA_BITS: number;
-    readonly ALWAYS: number;
-    readonly ARRAY_BUFFER: number;
-    readonly ARRAY_BUFFER_BINDING: number;
-    readonly ATTACHED_SHADERS: number;
-    readonly BACK: number;
-    readonly BLEND: number;
-    readonly BLEND_COLOR: number;
-    readonly BLEND_DST_ALPHA: number;
-    readonly BLEND_DST_RGB: number;
-    readonly BLEND_EQUATION: number;
-    readonly BLEND_EQUATION_ALPHA: number;
-    readonly BLEND_EQUATION_RGB: number;
-    readonly BLEND_SRC_ALPHA: number;
-    readonly BLEND_SRC_RGB: number;
-    readonly BLUE_BITS: number;
-    readonly BOOL: number;
-    readonly BOOL_VEC2: number;
-    readonly BOOL_VEC3: number;
-    readonly BOOL_VEC4: number;
-    readonly BROWSER_DEFAULT_WEBGL: number;
-    readonly BUFFER_SIZE: number;
-    readonly BUFFER_USAGE: number;
-    readonly BYTE: number;
-    readonly CCW: number;
-    readonly CLAMP_TO_EDGE: number;
-    readonly COLOR_ATTACHMENT0: number;
-    readonly COLOR_BUFFER_BIT: number;
-    readonly COLOR_CLEAR_VALUE: number;
-    readonly COLOR_WRITEMASK: number;
-    readonly COMPILE_STATUS: number;
-    readonly COMPRESSED_TEXTURE_FORMATS: number;
-    readonly CONSTANT_ALPHA: number;
-    readonly CONSTANT_COLOR: number;
-    readonly CONTEXT_LOST_WEBGL: number;
-    readonly CULL_FACE: number;
-    readonly CULL_FACE_MODE: number;
-    readonly CURRENT_PROGRAM: number;
-    readonly CURRENT_VERTEX_ATTRIB: number;
-    readonly CW: number;
-    readonly DECR: number;
-    readonly DECR_WRAP: number;
-    readonly DELETE_STATUS: number;
-    readonly DEPTH_ATTACHMENT: number;
-    readonly DEPTH_BITS: number;
-    readonly DEPTH_BUFFER_BIT: number;
-    readonly DEPTH_CLEAR_VALUE: number;
-    readonly DEPTH_COMPONENT: number;
-    readonly DEPTH_COMPONENT16: number;
-    readonly DEPTH_FUNC: number;
-    readonly DEPTH_RANGE: number;
-    readonly DEPTH_STENCIL: number;
-    readonly DEPTH_STENCIL_ATTACHMENT: number;
-    readonly DEPTH_TEST: number;
-    readonly DEPTH_WRITEMASK: number;
-    readonly DITHER: number;
-    readonly DONT_CARE: number;
-    readonly DST_ALPHA: number;
-    readonly DST_COLOR: number;
-    readonly DYNAMIC_DRAW: number;
-    readonly ELEMENT_ARRAY_BUFFER: number;
-    readonly ELEMENT_ARRAY_BUFFER_BINDING: number;
-    readonly EQUAL: number;
-    readonly FASTEST: number;
-    readonly FLOAT: number;
-    readonly FLOAT_MAT2: number;
-    readonly FLOAT_MAT3: number;
-    readonly FLOAT_MAT4: number;
-    readonly FLOAT_VEC2: number;
-    readonly FLOAT_VEC3: number;
-    readonly FLOAT_VEC4: number;
-    readonly FRAGMENT_SHADER: number;
-    readonly FRAMEBUFFER: number;
-    readonly FRAMEBUFFER_ATTACHMENT_OBJECT_NAME: number;
-    readonly FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE: number;
-    readonly FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE: number;
-    readonly FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL: number;
-    readonly FRAMEBUFFER_BINDING: number;
-    readonly FRAMEBUFFER_COMPLETE: number;
-    readonly FRAMEBUFFER_INCOMPLETE_ATTACHMENT: number;
-    readonly FRAMEBUFFER_INCOMPLETE_DIMENSIONS: number;
-    readonly FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT: number;
-    readonly FRAMEBUFFER_UNSUPPORTED: number;
-    readonly FRONT: number;
-    readonly FRONT_AND_BACK: number;
-    readonly FRONT_FACE: number;
-    readonly FUNC_ADD: number;
-    readonly FUNC_REVERSE_SUBTRACT: number;
-    readonly FUNC_SUBTRACT: number;
-    readonly GENERATE_MIPMAP_HINT: number;
-    readonly GEQUAL: number;
-    readonly GREATER: number;
-    readonly GREEN_BITS: number;
-    readonly HIGH_FLOAT: number;
-    readonly HIGH_INT: number;
-    readonly IMPLEMENTATION_COLOR_READ_FORMAT: number;
-    readonly IMPLEMENTATION_COLOR_READ_TYPE: number;
-    readonly INCR: number;
-    readonly INCR_WRAP: number;
-    readonly INT: number;
-    readonly INT_VEC2: number;
-    readonly INT_VEC3: number;
-    readonly INT_VEC4: number;
-    readonly INVALID_ENUM: number;
-    readonly INVALID_FRAMEBUFFER_OPERATION: number;
-    readonly INVALID_OPERATION: number;
-    readonly INVALID_VALUE: number;
-    readonly INVERT: number;
-    readonly KEEP: number;
-    readonly LEQUAL: number;
-    readonly LESS: number;
-    readonly LINEAR: number;
-    readonly LINEAR_MIPMAP_LINEAR: number;
-    readonly LINEAR_MIPMAP_NEAREST: number;
-    readonly LINES: number;
-    readonly LINE_LOOP: number;
-    readonly LINE_STRIP: number;
-    readonly LINE_WIDTH: number;
-    readonly LINK_STATUS: number;
-    readonly LOW_FLOAT: number;
-    readonly LOW_INT: number;
-    readonly LUMINANCE: number;
-    readonly LUMINANCE_ALPHA: number;
-    readonly MAX_COMBINED_TEXTURE_IMAGE_UNITS: number;
-    readonly MAX_CUBE_MAP_TEXTURE_SIZE: number;
-    readonly MAX_FRAGMENT_UNIFORM_VECTORS: number;
-    readonly MAX_RENDERBUFFER_SIZE: number;
-    readonly MAX_TEXTURE_IMAGE_UNITS: number;
-    readonly MAX_TEXTURE_SIZE: number;
-    readonly MAX_VARYING_VECTORS: number;
-    readonly MAX_VERTEX_ATTRIBS: number;
-    readonly MAX_VERTEX_TEXTURE_IMAGE_UNITS: number;
-    readonly MAX_VERTEX_UNIFORM_VECTORS: number;
-    readonly MAX_VIEWPORT_DIMS: number;
-    readonly MEDIUM_FLOAT: number;
-    readonly MEDIUM_INT: number;
-    readonly MIRRORED_REPEAT: number;
-    readonly NEAREST: number;
-    readonly NEAREST_MIPMAP_LINEAR: number;
-    readonly NEAREST_MIPMAP_NEAREST: number;
-    readonly NEVER: number;
-    readonly NICEST: number;
-    readonly NONE: number;
-    readonly NOTEQUAL: number;
-    readonly NO_ERROR: number;
-    readonly ONE: number;
-    readonly ONE_MINUS_CONSTANT_ALPHA: number;
-    readonly ONE_MINUS_CONSTANT_COLOR: number;
-    readonly ONE_MINUS_DST_ALPHA: number;
-    readonly ONE_MINUS_DST_COLOR: number;
-    readonly ONE_MINUS_SRC_ALPHA: number;
-    readonly ONE_MINUS_SRC_COLOR: number;
-    readonly OUT_OF_MEMORY: number;
-    readonly PACK_ALIGNMENT: number;
-    readonly POINTS: number;
-    readonly POLYGON_OFFSET_FACTOR: number;
-    readonly POLYGON_OFFSET_FILL: number;
-    readonly POLYGON_OFFSET_UNITS: number;
-    readonly RED_BITS: number;
-    readonly RENDERBUFFER: number;
-    readonly RENDERBUFFER_ALPHA_SIZE: number;
-    readonly RENDERBUFFER_BINDING: number;
-    readonly RENDERBUFFER_BLUE_SIZE: number;
-    readonly RENDERBUFFER_DEPTH_SIZE: number;
-    readonly RENDERBUFFER_GREEN_SIZE: number;
-    readonly RENDERBUFFER_HEIGHT: number;
-    readonly RENDERBUFFER_INTERNAL_FORMAT: number;
-    readonly RENDERBUFFER_RED_SIZE: number;
-    readonly RENDERBUFFER_STENCIL_SIZE: number;
-    readonly RENDERBUFFER_WIDTH: number;
-    readonly RENDERER: number;
-    readonly REPEAT: number;
-    readonly REPLACE: number;
-    readonly RGB: number;
-    readonly RGB565: number;
-    readonly RGB5_A1: number;
-    readonly RGBA: number;
-    readonly RGBA4: number;
-    readonly SAMPLER_2D: number;
-    readonly SAMPLER_CUBE: number;
-    readonly SAMPLES: number;
-    readonly SAMPLE_ALPHA_TO_COVERAGE: number;
-    readonly SAMPLE_BUFFERS: number;
-    readonly SAMPLE_COVERAGE: number;
-    readonly SAMPLE_COVERAGE_INVERT: number;
-    readonly SAMPLE_COVERAGE_VALUE: number;
-    readonly SCISSOR_BOX: number;
-    readonly SCISSOR_TEST: number;
-    readonly SHADER_TYPE: number;
-    readonly SHADING_LANGUAGE_VERSION: number;
-    readonly SHORT: number;
-    readonly SRC_ALPHA: number;
-    readonly SRC_ALPHA_SATURATE: number;
-    readonly SRC_COLOR: number;
-    readonly STATIC_DRAW: number;
-    readonly STENCIL_ATTACHMENT: number;
-    readonly STENCIL_BACK_FAIL: number;
-    readonly STENCIL_BACK_FUNC: number;
-    readonly STENCIL_BACK_PASS_DEPTH_FAIL: number;
-    readonly STENCIL_BACK_PASS_DEPTH_PASS: number;
-    readonly STENCIL_BACK_REF: number;
-    readonly STENCIL_BACK_VALUE_MASK: number;
-    readonly STENCIL_BACK_WRITEMASK: number;
-    readonly STENCIL_BITS: number;
-    readonly STENCIL_BUFFER_BIT: number;
-    readonly STENCIL_CLEAR_VALUE: number;
-    readonly STENCIL_FAIL: number;
-    readonly STENCIL_FUNC: number;
-    readonly STENCIL_INDEX: number;
-    readonly STENCIL_INDEX8: number;
-    readonly STENCIL_PASS_DEPTH_FAIL: number;
-    readonly STENCIL_PASS_DEPTH_PASS: number;
-    readonly STENCIL_REF: number;
-    readonly STENCIL_TEST: number;
-    readonly STENCIL_VALUE_MASK: number;
-    readonly STENCIL_WRITEMASK: number;
-    readonly STREAM_DRAW: number;
-    readonly SUBPIXEL_BITS: number;
-    readonly TEXTURE: number;
-    readonly TEXTURE0: number;
-    readonly TEXTURE1: number;
-    readonly TEXTURE10: number;
-    readonly TEXTURE11: number;
-    readonly TEXTURE12: number;
-    readonly TEXTURE13: number;
-    readonly TEXTURE14: number;
-    readonly TEXTURE15: number;
-    readonly TEXTURE16: number;
-    readonly TEXTURE17: number;
-    readonly TEXTURE18: number;
-    readonly TEXTURE19: number;
-    readonly TEXTURE2: number;
-    readonly TEXTURE20: number;
-    readonly TEXTURE21: number;
-    readonly TEXTURE22: number;
-    readonly TEXTURE23: number;
-    readonly TEXTURE24: number;
-    readonly TEXTURE25: number;
-    readonly TEXTURE26: number;
-    readonly TEXTURE27: number;
-    readonly TEXTURE28: number;
-    readonly TEXTURE29: number;
-    readonly TEXTURE3: number;
-    readonly TEXTURE30: number;
-    readonly TEXTURE31: number;
-    readonly TEXTURE4: number;
-    readonly TEXTURE5: number;
-    readonly TEXTURE6: number;
-    readonly TEXTURE7: number;
-    readonly TEXTURE8: number;
-    readonly TEXTURE9: number;
-    readonly TEXTURE_2D: number;
-    readonly TEXTURE_BINDING_2D: number;
-    readonly TEXTURE_BINDING_CUBE_MAP: number;
-    readonly TEXTURE_CUBE_MAP: number;
-    readonly TEXTURE_CUBE_MAP_NEGATIVE_X: number;
-    readonly TEXTURE_CUBE_MAP_NEGATIVE_Y: number;
-    readonly TEXTURE_CUBE_MAP_NEGATIVE_Z: number;
-    readonly TEXTURE_CUBE_MAP_POSITIVE_X: number;
-    readonly TEXTURE_CUBE_MAP_POSITIVE_Y: number;
-    readonly TEXTURE_CUBE_MAP_POSITIVE_Z: number;
-    readonly TEXTURE_MAG_FILTER: number;
-    readonly TEXTURE_MIN_FILTER: number;
-    readonly TEXTURE_WRAP_S: number;
-    readonly TEXTURE_WRAP_T: number;
-    readonly TRIANGLES: number;
-    readonly TRIANGLE_FAN: number;
-    readonly TRIANGLE_STRIP: number;
-    readonly UNPACK_ALIGNMENT: number;
-    readonly UNPACK_COLORSPACE_CONVERSION_WEBGL: number;
-    readonly UNPACK_FLIP_Y_WEBGL: number;
-    readonly UNPACK_PREMULTIPLY_ALPHA_WEBGL: number;
-    readonly UNSIGNED_BYTE: number;
-    readonly UNSIGNED_INT: number;
-    readonly UNSIGNED_SHORT: number;
-    readonly UNSIGNED_SHORT_4_4_4_4: number;
-    readonly UNSIGNED_SHORT_5_5_5_1: number;
-    readonly UNSIGNED_SHORT_5_6_5: number;
-    readonly VALIDATE_STATUS: number;
-    readonly VENDOR: number;
-    readonly VERSION: number;
-    readonly VERTEX_ATTRIB_ARRAY_BUFFER_BINDING: number;
-    readonly VERTEX_ATTRIB_ARRAY_ENABLED: number;
-    readonly VERTEX_ATTRIB_ARRAY_NORMALIZED: number;
-    readonly VERTEX_ATTRIB_ARRAY_POINTER: number;
-    readonly VERTEX_ATTRIB_ARRAY_SIZE: number;
-    readonly VERTEX_ATTRIB_ARRAY_STRIDE: number;
-    readonly VERTEX_ATTRIB_ARRAY_TYPE: number;
-    readonly VERTEX_SHADER: number;
-    readonly VIEWPORT: number;
-    readonly ZERO: number;
-}
-
-interface WebGLShader extends WebGLObject {
-}
-
-declare var WebGLShader: {
-    prototype: WebGLShader;
-    new(): WebGLShader;
-}
-
-interface WebGLShaderPrecisionFormat {
-    readonly precision: number;
-    readonly rangeMax: number;
-    readonly rangeMin: number;
-}
-
-declare var WebGLShaderPrecisionFormat: {
-    prototype: WebGLShaderPrecisionFormat;
-    new(): WebGLShaderPrecisionFormat;
-}
-
-interface WebGLTexture extends WebGLObject {
-}
-
-declare var WebGLTexture: {
-    prototype: WebGLTexture;
-    new(): WebGLTexture;
-}
-
-interface WebGLUniformLocation {
-}
-
-declare var WebGLUniformLocation: {
-    prototype: WebGLUniformLocation;
-    new(): WebGLUniformLocation;
-}
-
-interface WebKitCSSMatrix {
-    a: number;
-    b: number;
-    c: number;
-    d: number;
-    e: number;
-    f: number;
-    m11: number;
-    m12: number;
-    m13: number;
-    m14: number;
-    m21: number;
-    m22: number;
-    m23: number;
-    m24: number;
-    m31: number;
-    m32: number;
-    m33: number;
-    m34: number;
-    m41: number;
-    m42: number;
-    m43: number;
-    m44: number;
-    inverse(): WebKitCSSMatrix;
-    multiply(secondMatrix: WebKitCSSMatrix): WebKitCSSMatrix;
-    rotate(angleX: number, angleY?: number, angleZ?: number): WebKitCSSMatrix;
-    rotateAxisAngle(x: number, y: number, z: number, angle: number): WebKitCSSMatrix;
-    scale(scaleX: number, scaleY?: number, scaleZ?: number): WebKitCSSMatrix;
-    setMatrixValue(value: string): void;
-    skewX(angle: number): WebKitCSSMatrix;
-    skewY(angle: number): WebKitCSSMatrix;
-    toString(): string;
-    translate(x: number, y: number, z?: number): WebKitCSSMatrix;
-}
-
-declare var WebKitCSSMatrix: {
-    prototype: WebKitCSSMatrix;
-    new(text?: string): WebKitCSSMatrix;
-}
-
-interface WebKitPoint {
-    x: number;
-    y: number;
-}
-
-declare var WebKitPoint: {
-    prototype: WebKitPoint;
-    new(x?: number, y?: number): WebKitPoint;
-}
-
-interface WebSocket extends EventTarget {
-    binaryType: string;
-    readonly bufferedAmount: number;
-    readonly extensions: string;
-    onclose: (this: this, ev: CloseEvent) => any;
-    onerror: (this: this, ev: ErrorEvent) => any;
-    onmessage: (this: this, ev: MessageEvent) => any;
-    onopen: (this: this, ev: Event) => any;
-    readonly protocol: string;
-    readonly readyState: number;
-    readonly url: string;
-    close(code?: number, reason?: string): void;
-    send(data: any): void;
-    readonly CLOSED: number;
-    readonly CLOSING: number;
-    readonly CONNECTING: number;
-    readonly OPEN: number;
-    addEventListener(type: "close", listener: (this: this, ev: CloseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "message", listener: (this: this, ev: MessageEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "open", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var WebSocket: {
-    prototype: WebSocket;
-    new(url: string, protocols?: string | string[]): WebSocket;
-    readonly CLOSED: number;
-    readonly CLOSING: number;
-    readonly CONNECTING: number;
-    readonly OPEN: number;
-}
-
-interface WheelEvent extends MouseEvent {
-    readonly deltaMode: number;
-    readonly deltaX: number;
-    readonly deltaY: number;
-    readonly deltaZ: number;
-    readonly wheelDelta: number;
-    readonly wheelDeltaX: number;
-    readonly wheelDeltaY: number;
-    getCurrentPoint(element: Element): void;
-    initWheelEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, buttonArg: number, relatedTargetArg: EventTarget, modifiersListArg: string, deltaXArg: number, deltaYArg: number, deltaZArg: number, deltaMode: number): void;
-    readonly DOM_DELTA_LINE: number;
-    readonly DOM_DELTA_PAGE: number;
-    readonly DOM_DELTA_PIXEL: number;
-}
-
-declare var WheelEvent: {
-    prototype: WheelEvent;
-    new(typeArg: string, eventInitDict?: WheelEventInit): WheelEvent;
-    readonly DOM_DELTA_LINE: number;
-    readonly DOM_DELTA_PAGE: number;
-    readonly DOM_DELTA_PIXEL: number;
-}
-
-interface Window extends EventTarget, WindowTimers, WindowSessionStorage, WindowLocalStorage, WindowConsole, GlobalEventHandlers, IDBEnvironment, WindowBase64 {
-    readonly applicationCache: ApplicationCache;
-    readonly clientInformation: Navigator;
-    readonly closed: boolean;
-    readonly crypto: Crypto;
-    defaultStatus: string;
-    readonly devicePixelRatio: number;
-    readonly doNotTrack: string;
-    readonly document: Document;
-    event: Event;
-    readonly external: External;
-    readonly frameElement: Element;
-    readonly frames: Window;
-    readonly history: History;
-    readonly innerHeight: number;
-    readonly innerWidth: number;
-    readonly length: number;
-    readonly location: Location;
-    readonly locationbar: BarProp;
-    readonly menubar: BarProp;
-    readonly msCredentials: MSCredentials;
-    name: string;
-    readonly navigator: Navigator;
-    offscreenBuffering: string | boolean;
-    onabort: (this: this, ev: UIEvent) => any;
-    onafterprint: (this: this, ev: Event) => any;
-    onbeforeprint: (this: this, ev: Event) => any;
-    onbeforeunload: (this: this, ev: BeforeUnloadEvent) => any;
-    onblur: (this: this, ev: FocusEvent) => any;
-    oncanplay: (this: this, ev: Event) => any;
-    oncanplaythrough: (this: this, ev: Event) => any;
-    onchange: (this: this, ev: Event) => any;
-    onclick: (this: this, ev: MouseEvent) => any;
-    oncompassneedscalibration: (this: this, ev: Event) => any;
-    oncontextmenu: (this: this, ev: PointerEvent) => any;
-    ondblclick: (this: this, ev: MouseEvent) => any;
-    ondevicelight: (this: this, ev: DeviceLightEvent) => any;
-    ondevicemotion: (this: this, ev: DeviceMotionEvent) => any;
-    ondeviceorientation: (this: this, ev: DeviceOrientationEvent) => any;
-    ondrag: (this: this, ev: DragEvent) => any;
-    ondragend: (this: this, ev: DragEvent) => any;
-    ondragenter: (this: this, ev: DragEvent) => any;
-    ondragleave: (this: this, ev: DragEvent) => any;
-    ondragover: (this: this, ev: DragEvent) => any;
-    ondragstart: (this: this, ev: DragEvent) => any;
-    ondrop: (this: this, ev: DragEvent) => any;
-    ondurationchange: (this: this, ev: Event) => any;
-    onemptied: (this: this, ev: Event) => any;
-    onended: (this: this, ev: MediaStreamErrorEvent) => any;
-    onerror: ErrorEventHandler;
-    onfocus: (this: this, ev: FocusEvent) => any;
-    onhashchange: (this: this, ev: HashChangeEvent) => any;
-    oninput: (this: this, ev: Event) => any;
-    oninvalid: (this: this, ev: Event) => any;
-    onkeydown: (this: this, ev: KeyboardEvent) => any;
-    onkeypress: (this: this, ev: KeyboardEvent) => any;
-    onkeyup: (this: this, ev: KeyboardEvent) => any;
-    onload: (this: this, ev: Event) => any;
-    onloadeddata: (this: this, ev: Event) => any;
-    onloadedmetadata: (this: this, ev: Event) => any;
-    onloadstart: (this: this, ev: Event) => any;
-    onmessage: (this: this, ev: MessageEvent) => any;
-    onmousedown: (this: this, ev: MouseEvent) => any;
-    onmouseenter: (this: this, ev: MouseEvent) => any;
-    onmouseleave: (this: this, ev: MouseEvent) => any;
-    onmousemove: (this: this, ev: MouseEvent) => any;
-    onmouseout: (this: this, ev: MouseEvent) => any;
-    onmouseover: (this: this, ev: MouseEvent) => any;
-    onmouseup: (this: this, ev: MouseEvent) => any;
-    onmousewheel: (this: this, ev: WheelEvent) => any;
-    onmsgesturechange: (this: this, ev: MSGestureEvent) => any;
-    onmsgesturedoubletap: (this: this, ev: MSGestureEvent) => any;
-    onmsgestureend: (this: this, ev: MSGestureEvent) => any;
-    onmsgesturehold: (this: this, ev: MSGestureEvent) => any;
-    onmsgesturestart: (this: this, ev: MSGestureEvent) => any;
-    onmsgesturetap: (this: this, ev: MSGestureEvent) => any;
-    onmsinertiastart: (this: this, ev: MSGestureEvent) => any;
-    onmspointercancel: (this: this, ev: MSPointerEvent) => any;
-    onmspointerdown: (this: this, ev: MSPointerEvent) => any;
-    onmspointerenter: (this: this, ev: MSPointerEvent) => any;
-    onmspointerleave: (this: this, ev: MSPointerEvent) => any;
-    onmspointermove: (this: this, ev: MSPointerEvent) => any;
-    onmspointerout: (this: this, ev: MSPointerEvent) => any;
-    onmspointerover: (this: this, ev: MSPointerEvent) => any;
-    onmspointerup: (this: this, ev: MSPointerEvent) => any;
-    onoffline: (this: this, ev: Event) => any;
-    ononline: (this: this, ev: Event) => any;
-    onorientationchange: (this: this, ev: Event) => any;
-    onpagehide: (this: this, ev: PageTransitionEvent) => any;
-    onpageshow: (this: this, ev: PageTransitionEvent) => any;
-    onpause: (this: this, ev: Event) => any;
-    onplay: (this: this, ev: Event) => any;
-    onplaying: (this: this, ev: Event) => any;
-    onpopstate: (this: this, ev: PopStateEvent) => any;
-    onprogress: (this: this, ev: ProgressEvent) => any;
-    onratechange: (this: this, ev: Event) => any;
-    onreadystatechange: (this: this, ev: ProgressEvent) => any;
-    onreset: (this: this, ev: Event) => any;
-    onresize: (this: this, ev: UIEvent) => any;
-    onscroll: (this: this, ev: UIEvent) => any;
-    onseeked: (this: this, ev: Event) => any;
-    onseeking: (this: this, ev: Event) => any;
-    onselect: (this: this, ev: UIEvent) => any;
-    onstalled: (this: this, ev: Event) => any;
-    onstorage: (this: this, ev: StorageEvent) => any;
-    onsubmit: (this: this, ev: Event) => any;
-    onsuspend: (this: this, ev: Event) => any;
-    ontimeupdate: (this: this, ev: Event) => any;
-    ontouchcancel: (ev: TouchEvent) => any;
-    ontouchend: (ev: TouchEvent) => any;
-    ontouchmove: (ev: TouchEvent) => any;
-    ontouchstart: (ev: TouchEvent) => any;
-    onunload: (this: this, ev: Event) => any;
-    onvolumechange: (this: this, ev: Event) => any;
-    onwaiting: (this: this, ev: Event) => any;
-    opener: any;
-    orientation: string | number;
-    readonly outerHeight: number;
-    readonly outerWidth: number;
-    readonly pageXOffset: number;
-    readonly pageYOffset: number;
-    readonly parent: Window;
-    readonly performance: Performance;
-    readonly personalbar: BarProp;
-    readonly screen: Screen;
-    readonly screenLeft: number;
-    readonly screenTop: number;
-    readonly screenX: number;
-    readonly screenY: number;
-    readonly scrollX: number;
-    readonly scrollY: number;
-    readonly scrollbars: BarProp;
-    readonly self: Window;
-    status: string;
-    readonly statusbar: BarProp;
-    readonly styleMedia: StyleMedia;
-    readonly toolbar: BarProp;
-    readonly top: Window;
-    readonly window: Window;
-    URL: typeof URL;
-    Blob: typeof Blob;
-    alert(message?: any): void;
-    blur(): void;
-    cancelAnimationFrame(handle: number): void;
-    captureEvents(): void;
-    close(): void;
-    confirm(message?: string): boolean;
-    focus(): void;
-    getComputedStyle(elt: Element, pseudoElt?: string): CSSStyleDeclaration;
-    getMatchedCSSRules(elt: Element, pseudoElt?: string): CSSRuleList;
-    getSelection(): Selection;
-    matchMedia(mediaQuery: string): MediaQueryList;
-    moveBy(x?: number, y?: number): void;
-    moveTo(x?: number, y?: number): void;
-    msWriteProfilerMark(profilerMarkName: string): void;
-    open(url?: string, target?: string, features?: string, replace?: boolean): Window;
-    postMessage(message: any, targetOrigin: string, transfer?: any[]): void;
-    print(): void;
-    prompt(message?: string, _default?: string): string | null;
-    releaseEvents(): void;
-    requestAnimationFrame(callback: FrameRequestCallback): number;
-    resizeBy(x?: number, y?: number): void;
-    resizeTo(x?: number, y?: number): void;
-    scroll(x?: number, y?: number): void;
-    scrollBy(x?: number, y?: number): void;
-    scrollTo(x?: number, y?: number): void;
-    webkitCancelAnimationFrame(handle: number): void;
-    webkitConvertPointFromNodeToPage(node: Node, pt: WebKitPoint): WebKitPoint;
-    webkitConvertPointFromPageToNode(node: Node, pt: WebKitPoint): WebKitPoint;
-    webkitRequestAnimationFrame(callback: FrameRequestCallback): number;
-    scroll(options?: ScrollToOptions): void;
-    scrollTo(options?: ScrollToOptions): void;
-    scrollBy(options?: ScrollToOptions): void;
-    addEventListener(type: "MSGestureChange", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureDoubleTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureEnd", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureHold", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSInertiaStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerCancel", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerDown", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerEnter", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerLeave", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerMove", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOut", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOver", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerUp", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "abort", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "afterprint", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforeprint", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforeunload", listener: (this: this, ev: BeforeUnloadEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "blur", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplay", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplaythrough", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "change", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "click", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "compassneedscalibration", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "contextmenu", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dblclick", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "devicelight", listener: (this: this, ev: DeviceLightEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "devicemotion", listener: (this: this, ev: DeviceMotionEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "deviceorientation", listener: (this: this, ev: DeviceOrientationEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drag", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragend", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragenter", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragleave", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragover", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragstart", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drop", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "durationchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "emptied", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "ended", listener: (this: this, ev: MediaStreamErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "focus", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "hashchange", listener: (this: this, ev: HashChangeEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "input", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "invalid", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "keydown", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keypress", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keyup", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadeddata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadedmetadata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "message", listener: (this: this, ev: MessageEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousedown", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseenter", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseleave", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousemove", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseout", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseover", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseup", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousewheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "offline", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "online", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "orientationchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "pagehide", listener: (this: this, ev: PageTransitionEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pageshow", listener: (this: this, ev: PageTransitionEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pause", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "play", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "playing", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointercancel", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerdown", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerenter", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerleave", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointermove", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerout", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerover", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerup", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "popstate", listener: (this: this, ev: PopStateEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "progress", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ratechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "readystatechange", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "reset", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "resize", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "scroll", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeked", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeking", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "select", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "stalled", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "storage", listener: (this: this, ev: StorageEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "submit", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "suspend", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "timeupdate", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "unload", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "volumechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "waiting", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "wheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var Window: {
-    prototype: Window;
-    new(): Window;
-}
-
-interface Worker extends EventTarget, AbstractWorker {
-    onmessage: (this: this, ev: MessageEvent) => any;
-    postMessage(message: any, ports?: any): void;
-    terminate(): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "message", listener: (this: this, ev: MessageEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var Worker: {
-    prototype: Worker;
-    new(stringUrl: string): Worker;
-}
-
-interface XMLDocument extends Document {
-}
-
-declare var XMLDocument: {
-    prototype: XMLDocument;
-    new(): XMLDocument;
-}
-
-interface XMLHttpRequest extends EventTarget, XMLHttpRequestEventTarget {
-    onreadystatechange: (this: this, ev: Event) => any;
-    readonly readyState: number;
-    readonly response: any;
-    readonly responseText: string;
-    responseType: string;
-    readonly responseXML: any;
-    readonly status: number;
-    readonly statusText: string;
-    timeout: number;
-    readonly upload: XMLHttpRequestUpload;
-    withCredentials: boolean;
-    msCaching?: string;
-    abort(): void;
-    getAllResponseHeaders(): string;
-    getResponseHeader(header: string): string | null;
-    msCachingEnabled(): boolean;
-    open(method: string, url: string, async?: boolean, user?: string, password?: string): void;
-    overrideMimeType(mime: string): void;
-    send(data?: Document): void;
-    send(data?: string): void;
-    send(data?: any): void;
-    setRequestHeader(header: string, value: string): void;
-    readonly DONE: number;
-    readonly HEADERS_RECEIVED: number;
-    readonly LOADING: number;
-    readonly OPENED: number;
-    readonly UNSENT: number;
-    addEventListener(type: "abort", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadend", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadstart", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "progress", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "readystatechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "timeout", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var XMLHttpRequest: {
-    prototype: XMLHttpRequest;
-    new(): XMLHttpRequest;
-    readonly DONE: number;
-    readonly HEADERS_RECEIVED: number;
-    readonly LOADING: number;
-    readonly OPENED: number;
-    readonly UNSENT: number;
-    create(): XMLHttpRequest;
-}
-
-interface XMLHttpRequestUpload extends EventTarget, XMLHttpRequestEventTarget {
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var XMLHttpRequestUpload: {
-    prototype: XMLHttpRequestUpload;
-    new(): XMLHttpRequestUpload;
-}
-
-interface XMLSerializer {
-    serializeToString(target: Node): string;
-}
-
-declare var XMLSerializer: {
-    prototype: XMLSerializer;
-    new(): XMLSerializer;
-}
-
-interface XPathEvaluator {
-    createExpression(expression: string, resolver: XPathNSResolver): XPathExpression;
-    createNSResolver(nodeResolver?: Node): XPathNSResolver;
-    evaluate(expression: string, contextNode: Node, resolver: XPathNSResolver, type: number, result: XPathResult): XPathResult;
-}
-
-declare var XPathEvaluator: {
-    prototype: XPathEvaluator;
-    new(): XPathEvaluator;
-}
-
-interface XPathExpression {
-    evaluate(contextNode: Node, type: number, result: XPathResult): XPathExpression;
-}
-
-declare var XPathExpression: {
-    prototype: XPathExpression;
-    new(): XPathExpression;
-}
-
-interface XPathNSResolver {
-    lookupNamespaceURI(prefix: string): string;
-}
-
-declare var XPathNSResolver: {
-    prototype: XPathNSResolver;
-    new(): XPathNSResolver;
-}
-
-interface XPathResult {
-    readonly booleanValue: boolean;
-    readonly invalidIteratorState: boolean;
-    readonly numberValue: number;
-    readonly resultType: number;
-    readonly singleNodeValue: Node;
-    readonly snapshotLength: number;
-    readonly stringValue: string;
-    iterateNext(): Node;
-    snapshotItem(index: number): Node;
-    readonly ANY_TYPE: number;
-    readonly ANY_UNORDERED_NODE_TYPE: number;
-    readonly BOOLEAN_TYPE: number;
-    readonly FIRST_ORDERED_NODE_TYPE: number;
-    readonly NUMBER_TYPE: number;
-    readonly ORDERED_NODE_ITERATOR_TYPE: number;
-    readonly ORDERED_NODE_SNAPSHOT_TYPE: number;
-    readonly STRING_TYPE: number;
-    readonly UNORDERED_NODE_ITERATOR_TYPE: number;
-    readonly UNORDERED_NODE_SNAPSHOT_TYPE: number;
-}
-
-declare var XPathResult: {
-    prototype: XPathResult;
-    new(): XPathResult;
-    readonly ANY_TYPE: number;
-    readonly ANY_UNORDERED_NODE_TYPE: number;
-    readonly BOOLEAN_TYPE: number;
-    readonly FIRST_ORDERED_NODE_TYPE: number;
-    readonly NUMBER_TYPE: number;
-    readonly ORDERED_NODE_ITERATOR_TYPE: number;
-    readonly ORDERED_NODE_SNAPSHOT_TYPE: number;
-    readonly STRING_TYPE: number;
-    readonly UNORDERED_NODE_ITERATOR_TYPE: number;
-    readonly UNORDERED_NODE_SNAPSHOT_TYPE: number;
-}
-
-interface XSLTProcessor {
-    clearParameters(): void;
-    getParameter(namespaceURI: string, localName: string): any;
-    importStylesheet(style: Node): void;
-    removeParameter(namespaceURI: string, localName: string): void;
-    reset(): void;
-    setParameter(namespaceURI: string, localName: string, value: any): void;
-    transformToDocument(source: Node): Document;
-    transformToFragment(source: Node, document: Document): DocumentFragment;
-}
-
-declare var XSLTProcessor: {
-    prototype: XSLTProcessor;
-    new(): XSLTProcessor;
-}
-
-interface AbstractWorker {
-    onerror: (this: this, ev: ErrorEvent) => any;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-interface CanvasPathMethods {
-    arc(x: number, y: number, radius: number, startAngle: number, endAngle: number, anticlockwise?: boolean): void;
-    arcTo(x1: number, y1: number, x2: number, y2: number, radius: number): void;
-    bezierCurveTo(cp1x: number, cp1y: number, cp2x: number, cp2y: number, x: number, y: number): void;
-    closePath(): void;
-    ellipse(x: number, y: number, radiusX: number, radiusY: number, rotation: number, startAngle: number, endAngle: number, anticlockwise?: boolean): void;
-    lineTo(x: number, y: number): void;
-    moveTo(x: number, y: number): void;
-    quadraticCurveTo(cpx: number, cpy: number, x: number, y: number): void;
-    rect(x: number, y: number, w: number, h: number): void;
-}
-
-interface ChildNode {
-    remove(): void;
-}
-
-interface DOML2DeprecatedColorProperty {
-    color: string;
-}
-
-interface DOML2DeprecatedSizeProperty {
-    size: number;
-}
-
-interface DocumentEvent {
-    createEvent(eventInterface:"AnimationEvent"): AnimationEvent;
-    createEvent(eventInterface:"AriaRequestEvent"): AriaRequestEvent;
-    createEvent(eventInterface:"AudioProcessingEvent"): AudioProcessingEvent;
-    createEvent(eventInterface:"BeforeUnloadEvent"): BeforeUnloadEvent;
-    createEvent(eventInterface:"ClipboardEvent"): ClipboardEvent;
-    createEvent(eventInterface:"CloseEvent"): CloseEvent;
-    createEvent(eventInterface:"CommandEvent"): CommandEvent;
-    createEvent(eventInterface:"CompositionEvent"): CompositionEvent;
-    createEvent(eventInterface:"CustomEvent"): CustomEvent;
-    createEvent(eventInterface:"DeviceLightEvent"): DeviceLightEvent;
-    createEvent(eventInterface:"DeviceMotionEvent"): DeviceMotionEvent;
-    createEvent(eventInterface:"DeviceOrientationEvent"): DeviceOrientationEvent;
-    createEvent(eventInterface:"DragEvent"): DragEvent;
-    createEvent(eventInterface:"ErrorEvent"): ErrorEvent;
-    createEvent(eventInterface:"Event"): Event;
-    createEvent(eventInterface:"Events"): Event;
-    createEvent(eventInterface:"FocusEvent"): FocusEvent;
-    createEvent(eventInterface:"GamepadEvent"): GamepadEvent;
-    createEvent(eventInterface:"HashChangeEvent"): HashChangeEvent;
-    createEvent(eventInterface:"IDBVersionChangeEvent"): IDBVersionChangeEvent;
-    createEvent(eventInterface:"KeyboardEvent"): KeyboardEvent;
-    createEvent(eventInterface:"ListeningStateChangedEvent"): ListeningStateChangedEvent;
-    createEvent(eventInterface:"LongRunningScriptDetectedEvent"): LongRunningScriptDetectedEvent;
-    createEvent(eventInterface:"MSGestureEvent"): MSGestureEvent;
-    createEvent(eventInterface:"MSManipulationEvent"): MSManipulationEvent;
-    createEvent(eventInterface:"MSMediaKeyMessageEvent"): MSMediaKeyMessageEvent;
-    createEvent(eventInterface:"MSMediaKeyNeededEvent"): MSMediaKeyNeededEvent;
-    createEvent(eventInterface:"MSPointerEvent"): MSPointerEvent;
-    createEvent(eventInterface:"MSSiteModeEvent"): MSSiteModeEvent;
-    createEvent(eventInterface:"MediaEncryptedEvent"): MediaEncryptedEvent;
-    createEvent(eventInterface:"MediaKeyMessageEvent"): MediaKeyMessageEvent;
-    createEvent(eventInterface:"MediaStreamErrorEvent"): MediaStreamErrorEvent;
-    createEvent(eventInterface:"MediaStreamTrackEvent"): MediaStreamTrackEvent;
-    createEvent(eventInterface:"MessageEvent"): MessageEvent;
-    createEvent(eventInterface:"MouseEvent"): MouseEvent;
-    createEvent(eventInterface:"MouseEvents"): MouseEvent;
-    createEvent(eventInterface:"MutationEvent"): MutationEvent;
-    createEvent(eventInterface:"MutationEvents"): MutationEvent;
-    createEvent(eventInterface:"NavigationCompletedEvent"): NavigationCompletedEvent;
-    createEvent(eventInterface:"NavigationEvent"): NavigationEvent;
-    createEvent(eventInterface:"NavigationEventWithReferrer"): NavigationEventWithReferrer;
-    createEvent(eventInterface:"OfflineAudioCompletionEvent"): OfflineAudioCompletionEvent;
-    createEvent(eventInterface:"OverflowEvent"): OverflowEvent;
-    createEvent(eventInterface:"PageTransitionEvent"): PageTransitionEvent;
-    createEvent(eventInterface:"PermissionRequestedEvent"): PermissionRequestedEvent;
-    createEvent(eventInterface:"PointerEvent"): PointerEvent;
-    createEvent(eventInterface:"PopStateEvent"): PopStateEvent;
-    createEvent(eventInterface:"ProgressEvent"): ProgressEvent;
-    createEvent(eventInterface:"RTCDTMFToneChangeEvent"): RTCDTMFToneChangeEvent;
-    createEvent(eventInterface:"RTCDtlsTransportStateChangedEvent"): RTCDtlsTransportStateChangedEvent;
-    createEvent(eventInterface:"RTCIceCandidatePairChangedEvent"): RTCIceCandidatePairChangedEvent;
-    createEvent(eventInterface:"RTCIceGathererEvent"): RTCIceGathererEvent;
-    createEvent(eventInterface:"RTCIceTransportStateChangedEvent"): RTCIceTransportStateChangedEvent;
-    createEvent(eventInterface:"RTCSsrcConflictEvent"): RTCSsrcConflictEvent;
-    createEvent(eventInterface:"SVGZoomEvent"): SVGZoomEvent;
-    createEvent(eventInterface:"SVGZoomEvents"): SVGZoomEvent;
-    createEvent(eventInterface:"ScriptNotifyEvent"): ScriptNotifyEvent;
-    createEvent(eventInterface:"StorageEvent"): StorageEvent;
-    createEvent(eventInterface:"TextEvent"): TextEvent;
-    createEvent(eventInterface:"TouchEvent"): TouchEvent;
-    createEvent(eventInterface:"TrackEvent"): TrackEvent;
-    createEvent(eventInterface:"TransitionEvent"): TransitionEvent;
-    createEvent(eventInterface:"UIEvent"): UIEvent;
-    createEvent(eventInterface:"UIEvents"): UIEvent;
-    createEvent(eventInterface:"UnviewableContentIdentifiedEvent"): UnviewableContentIdentifiedEvent;
-    createEvent(eventInterface:"WebGLContextEvent"): WebGLContextEvent;
-    createEvent(eventInterface:"WheelEvent"): WheelEvent;
-    createEvent(eventInterface: string): Event;
-}
-
-interface ElementTraversal {
-    readonly childElementCount: number;
-    readonly firstElementChild: Element;
-    readonly lastElementChild: Element;
-    readonly nextElementSibling: Element;
-    readonly previousElementSibling: Element;
-}
-
-interface GetSVGDocument {
-    getSVGDocument(): Document;
-}
-
-interface GlobalEventHandlers {
-    onpointercancel: (this: this, ev: PointerEvent) => any;
-    onpointerdown: (this: this, ev: PointerEvent) => any;
-    onpointerenter: (this: this, ev: PointerEvent) => any;
-    onpointerleave: (this: this, ev: PointerEvent) => any;
-    onpointermove: (this: this, ev: PointerEvent) => any;
-    onpointerout: (this: this, ev: PointerEvent) => any;
-    onpointerover: (this: this, ev: PointerEvent) => any;
-    onpointerup: (this: this, ev: PointerEvent) => any;
-    onwheel: (this: this, ev: WheelEvent) => any;
-    addEventListener(type: "pointercancel", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerdown", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerenter", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerleave", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointermove", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerout", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerover", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerup", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "wheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-interface HTMLTableAlignment {
-    /**
-      * Sets or retrieves a value that you can use to implement your own ch functionality for the object.
-      */
-    ch: string;
-    /**
-      * Sets or retrieves a value that you can use to implement your own chOff functionality for the object.
-      */
-    chOff: string;
-    /**
-      * Sets or retrieves how text and other content are vertically aligned within the object that contains them.
-      */
-    vAlign: string;
-}
-
-interface IDBEnvironment {
-    readonly indexedDB: IDBFactory;
-}
-
-interface LinkStyle {
-    readonly sheet: StyleSheet;
-}
-
-interface MSBaseReader {
-    onabort: (this: this, ev: Event) => any;
-    onerror: (this: this, ev: ErrorEvent) => any;
-    onload: (this: this, ev: Event) => any;
-    onloadend: (this: this, ev: ProgressEvent) => any;
-    onloadstart: (this: this, ev: Event) => any;
-    onprogress: (this: this, ev: ProgressEvent) => any;
-    readonly readyState: number;
-    readonly result: any;
-    abort(): void;
-    readonly DONE: number;
-    readonly EMPTY: number;
-    readonly LOADING: number;
-    addEventListener(type: "abort", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadend", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "progress", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-interface MSFileSaver {
-    msSaveBlob(blob: any, defaultName?: string): boolean;
-    msSaveOrOpenBlob(blob: any, defaultName?: string): boolean;
-}
-
-interface MSNavigatorDoNotTrack {
-    confirmSiteSpecificTrackingException(args: ConfirmSiteSpecificExceptionsInformation): boolean;
-    confirmWebWideTrackingException(args: ExceptionInformation): boolean;
-    removeSiteSpecificTrackingException(args: ExceptionInformation): void;
-    removeWebWideTrackingException(args: ExceptionInformation): void;
-    storeSiteSpecificTrackingException(args: StoreSiteSpecificExceptionsInformation): void;
-    storeWebWideTrackingException(args: StoreExceptionsInformation): void;
-}
-
-interface NavigatorContentUtils {
-}
-
-interface NavigatorGeolocation {
-    readonly geolocation: Geolocation;
-}
-
-interface NavigatorID {
-    readonly appName: string;
-    readonly appVersion: string;
-    readonly platform: string;
-    readonly product: string;
-    readonly productSub: string;
-    readonly userAgent: string;
-    readonly vendor: string;
-    readonly vendorSub: string;
-}
-
-interface NavigatorOnLine {
-    readonly onLine: boolean;
-}
-
-interface NavigatorStorageUtils {
-}
-
-interface NavigatorUserMedia {
-    readonly mediaDevices: MediaDevices;
-    getUserMedia(constraints: MediaStreamConstraints, successCallback: NavigatorUserMediaSuccessCallback, errorCallback: NavigatorUserMediaErrorCallback): void;
-}
-
-interface NodeSelector {
-    querySelector(selectors: "a"): HTMLAnchorElement | null;
-    querySelector(selectors: "abbr"): HTMLElement | null;
-    querySelector(selectors: "acronym"): HTMLElement | null;
-    querySelector(selectors: "address"): HTMLElement | null;
-    querySelector(selectors: "applet"): HTMLAppletElement | null;
-    querySelector(selectors: "area"): HTMLAreaElement | null;
-    querySelector(selectors: "article"): HTMLElement | null;
-    querySelector(selectors: "aside"): HTMLElement | null;
-    querySelector(selectors: "audio"): HTMLAudioElement | null;
-    querySelector(selectors: "b"): HTMLElement | null;
-    querySelector(selectors: "base"): HTMLBaseElement | null;
-    querySelector(selectors: "basefont"): HTMLBaseFontElement | null;
-    querySelector(selectors: "bdo"): HTMLElement | null;
-    querySelector(selectors: "big"): HTMLElement | null;
-    querySelector(selectors: "blockquote"): HTMLQuoteElement | null;
-    querySelector(selectors: "body"): HTMLBodyElement | null;
-    querySelector(selectors: "br"): HTMLBRElement | null;
-    querySelector(selectors: "button"): HTMLButtonElement | null;
-    querySelector(selectors: "canvas"): HTMLCanvasElement | null;
-    querySelector(selectors: "caption"): HTMLTableCaptionElement | null;
-    querySelector(selectors: "center"): HTMLElement | null;
-    querySelector(selectors: "circle"): SVGCircleElement | null;
-    querySelector(selectors: "cite"): HTMLElement | null;
-    querySelector(selectors: "clippath"): SVGClipPathElement | null;
-    querySelector(selectors: "code"): HTMLElement | null;
-    querySelector(selectors: "col"): HTMLTableColElement | null;
-    querySelector(selectors: "colgroup"): HTMLTableColElement | null;
-    querySelector(selectors: "datalist"): HTMLDataListElement | null;
-    querySelector(selectors: "dd"): HTMLElement | null;
-    querySelector(selectors: "defs"): SVGDefsElement | null;
-    querySelector(selectors: "del"): HTMLModElement | null;
-    querySelector(selectors: "desc"): SVGDescElement | null;
-    querySelector(selectors: "dfn"): HTMLElement | null;
-    querySelector(selectors: "dir"): HTMLDirectoryElement | null;
-    querySelector(selectors: "div"): HTMLDivElement | null;
-    querySelector(selectors: "dl"): HTMLDListElement | null;
-    querySelector(selectors: "dt"): HTMLElement | null;
-    querySelector(selectors: "ellipse"): SVGEllipseElement | null;
-    querySelector(selectors: "em"): HTMLElement | null;
-    querySelector(selectors: "embed"): HTMLEmbedElement | null;
-    querySelector(selectors: "feblend"): SVGFEBlendElement | null;
-    querySelector(selectors: "fecolormatrix"): SVGFEColorMatrixElement | null;
-    querySelector(selectors: "fecomponenttransfer"): SVGFEComponentTransferElement | null;
-    querySelector(selectors: "fecomposite"): SVGFECompositeElement | null;
-    querySelector(selectors: "feconvolvematrix"): SVGFEConvolveMatrixElement | null;
-    querySelector(selectors: "fediffuselighting"): SVGFEDiffuseLightingElement | null;
-    querySelector(selectors: "fedisplacementmap"): SVGFEDisplacementMapElement | null;
-    querySelector(selectors: "fedistantlight"): SVGFEDistantLightElement | null;
-    querySelector(selectors: "feflood"): SVGFEFloodElement | null;
-    querySelector(selectors: "fefunca"): SVGFEFuncAElement | null;
-    querySelector(selectors: "fefuncb"): SVGFEFuncBElement | null;
-    querySelector(selectors: "fefuncg"): SVGFEFuncGElement | null;
-    querySelector(selectors: "fefuncr"): SVGFEFuncRElement | null;
-    querySelector(selectors: "fegaussianblur"): SVGFEGaussianBlurElement | null;
-    querySelector(selectors: "feimage"): SVGFEImageElement | null;
-    querySelector(selectors: "femerge"): SVGFEMergeElement | null;
-    querySelector(selectors: "femergenode"): SVGFEMergeNodeElement | null;
-    querySelector(selectors: "femorphology"): SVGFEMorphologyElement | null;
-    querySelector(selectors: "feoffset"): SVGFEOffsetElement | null;
-    querySelector(selectors: "fepointlight"): SVGFEPointLightElement | null;
-    querySelector(selectors: "fespecularlighting"): SVGFESpecularLightingElement | null;
-    querySelector(selectors: "fespotlight"): SVGFESpotLightElement | null;
-    querySelector(selectors: "fetile"): SVGFETileElement | null;
-    querySelector(selectors: "feturbulence"): SVGFETurbulenceElement | null;
-    querySelector(selectors: "fieldset"): HTMLFieldSetElement | null;
-    querySelector(selectors: "figcaption"): HTMLElement | null;
-    querySelector(selectors: "figure"): HTMLElement | null;
-    querySelector(selectors: "filter"): SVGFilterElement | null;
-    querySelector(selectors: "font"): HTMLFontElement | null;
-    querySelector(selectors: "footer"): HTMLElement | null;
-    querySelector(selectors: "foreignobject"): SVGForeignObjectElement | null;
-    querySelector(selectors: "form"): HTMLFormElement | null;
-    querySelector(selectors: "frame"): HTMLFrameElement | null;
-    querySelector(selectors: "frameset"): HTMLFrameSetElement | null;
-    querySelector(selectors: "g"): SVGGElement | null;
-    querySelector(selectors: "h1"): HTMLHeadingElement | null;
-    querySelector(selectors: "h2"): HTMLHeadingElement | null;
-    querySelector(selectors: "h3"): HTMLHeadingElement | null;
-    querySelector(selectors: "h4"): HTMLHeadingElement | null;
-    querySelector(selectors: "h5"): HTMLHeadingElement | null;
-    querySelector(selectors: "h6"): HTMLHeadingElement | null;
-    querySelector(selectors: "head"): HTMLHeadElement | null;
-    querySelector(selectors: "header"): HTMLElement | null;
-    querySelector(selectors: "hgroup"): HTMLElement | null;
-    querySelector(selectors: "hr"): HTMLHRElement | null;
-    querySelector(selectors: "html"): HTMLHtmlElement | null;
-    querySelector(selectors: "i"): HTMLElement | null;
-    querySelector(selectors: "iframe"): HTMLIFrameElement | null;
-    querySelector(selectors: "image"): SVGImageElement | null;
-    querySelector(selectors: "img"): HTMLImageElement | null;
-    querySelector(selectors: "input"): HTMLInputElement | null;
-    querySelector(selectors: "ins"): HTMLModElement | null;
-    querySelector(selectors: "isindex"): HTMLUnknownElement | null;
-    querySelector(selectors: "kbd"): HTMLElement | null;
-    querySelector(selectors: "keygen"): HTMLElement | null;
-    querySelector(selectors: "label"): HTMLLabelElement | null;
-    querySelector(selectors: "legend"): HTMLLegendElement | null;
-    querySelector(selectors: "li"): HTMLLIElement | null;
-    querySelector(selectors: "line"): SVGLineElement | null;
-    querySelector(selectors: "lineargradient"): SVGLinearGradientElement | null;
-    querySelector(selectors: "link"): HTMLLinkElement | null;
-    querySelector(selectors: "listing"): HTMLPreElement | null;
-    querySelector(selectors: "map"): HTMLMapElement | null;
-    querySelector(selectors: "mark"): HTMLElement | null;
-    querySelector(selectors: "marker"): SVGMarkerElement | null;
-    querySelector(selectors: "marquee"): HTMLMarqueeElement | null;
-    querySelector(selectors: "mask"): SVGMaskElement | null;
-    querySelector(selectors: "menu"): HTMLMenuElement | null;
-    querySelector(selectors: "meta"): HTMLMetaElement | null;
-    querySelector(selectors: "metadata"): SVGMetadataElement | null;
-    querySelector(selectors: "meter"): HTMLMeterElement | null;
-    querySelector(selectors: "nav"): HTMLElement | null;
-    querySelector(selectors: "nextid"): HTMLUnknownElement | null;
-    querySelector(selectors: "nobr"): HTMLElement | null;
-    querySelector(selectors: "noframes"): HTMLElement | null;
-    querySelector(selectors: "noscript"): HTMLElement | null;
-    querySelector(selectors: "object"): HTMLObjectElement | null;
-    querySelector(selectors: "ol"): HTMLOListElement | null;
-    querySelector(selectors: "optgroup"): HTMLOptGroupElement | null;
-    querySelector(selectors: "option"): HTMLOptionElement | null;
-    querySelector(selectors: "p"): HTMLParagraphElement | null;
-    querySelector(selectors: "param"): HTMLParamElement | null;
-    querySelector(selectors: "path"): SVGPathElement | null;
-    querySelector(selectors: "pattern"): SVGPatternElement | null;
-    querySelector(selectors: "picture"): HTMLPictureElement | null;
-    querySelector(selectors: "plaintext"): HTMLElement | null;
-    querySelector(selectors: "polygon"): SVGPolygonElement | null;
-    querySelector(selectors: "polyline"): SVGPolylineElement | null;
-    querySelector(selectors: "pre"): HTMLPreElement | null;
-    querySelector(selectors: "progress"): HTMLProgressElement | null;
-    querySelector(selectors: "q"): HTMLQuoteElement | null;
-    querySelector(selectors: "radialgradient"): SVGRadialGradientElement | null;
-    querySelector(selectors: "rect"): SVGRectElement | null;
-    querySelector(selectors: "rt"): HTMLElement | null;
-    querySelector(selectors: "ruby"): HTMLElement | null;
-    querySelector(selectors: "s"): HTMLElement | null;
-    querySelector(selectors: "samp"): HTMLElement | null;
-    querySelector(selectors: "script"): HTMLScriptElement | null;
-    querySelector(selectors: "section"): HTMLElement | null;
-    querySelector(selectors: "select"): HTMLSelectElement | null;
-    querySelector(selectors: "small"): HTMLElement | null;
-    querySelector(selectors: "source"): HTMLSourceElement | null;
-    querySelector(selectors: "span"): HTMLSpanElement | null;
-    querySelector(selectors: "stop"): SVGStopElement | null;
-    querySelector(selectors: "strike"): HTMLElement | null;
-    querySelector(selectors: "strong"): HTMLElement | null;
-    querySelector(selectors: "style"): HTMLStyleElement | null;
-    querySelector(selectors: "sub"): HTMLElement | null;
-    querySelector(selectors: "sup"): HTMLElement | null;
-    querySelector(selectors: "svg"): SVGSVGElement | null;
-    querySelector(selectors: "switch"): SVGSwitchElement | null;
-    querySelector(selectors: "symbol"): SVGSymbolElement | null;
-    querySelector(selectors: "table"): HTMLTableElement | null;
-    querySelector(selectors: "tbody"): HTMLTableSectionElement | null;
-    querySelector(selectors: "td"): HTMLTableDataCellElement | null;
-    querySelector(selectors: "template"): HTMLTemplateElement | null;
-    querySelector(selectors: "text"): SVGTextElement | null;
-    querySelector(selectors: "textpath"): SVGTextPathElement | null;
-    querySelector(selectors: "textarea"): HTMLTextAreaElement | null;
-    querySelector(selectors: "tfoot"): HTMLTableSectionElement | null;
-    querySelector(selectors: "th"): HTMLTableHeaderCellElement | null;
-    querySelector(selectors: "thead"): HTMLTableSectionElement | null;
-    querySelector(selectors: "title"): HTMLTitleElement | null;
-    querySelector(selectors: "tr"): HTMLTableRowElement | null;
-    querySelector(selectors: "track"): HTMLTrackElement | null;
-    querySelector(selectors: "tspan"): SVGTSpanElement | null;
-    querySelector(selectors: "tt"): HTMLElement | null;
-    querySelector(selectors: "u"): HTMLElement | null;
-    querySelector(selectors: "ul"): HTMLUListElement | null;
-    querySelector(selectors: "use"): SVGUseElement | null;
-    querySelector(selectors: "var"): HTMLElement | null;
-    querySelector(selectors: "video"): HTMLVideoElement | null;
-    querySelector(selectors: "view"): SVGViewElement | null;
-    querySelector(selectors: "wbr"): HTMLElement | null;
-    querySelector(selectors: "x-ms-webview"): MSHTMLWebViewElement | null;
-    querySelector(selectors: "xmp"): HTMLPreElement | null;
-    querySelector(selectors: string): Element | null;
-    querySelectorAll(selectors: "a"): NodeListOf<HTMLAnchorElement>;
-    querySelectorAll(selectors: "abbr"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "acronym"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "address"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "applet"): NodeListOf<HTMLAppletElement>;
-    querySelectorAll(selectors: "area"): NodeListOf<HTMLAreaElement>;
-    querySelectorAll(selectors: "article"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "aside"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "audio"): NodeListOf<HTMLAudioElement>;
-    querySelectorAll(selectors: "b"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "base"): NodeListOf<HTMLBaseElement>;
-    querySelectorAll(selectors: "basefont"): NodeListOf<HTMLBaseFontElement>;
-    querySelectorAll(selectors: "bdo"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "big"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "blockquote"): NodeListOf<HTMLQuoteElement>;
-    querySelectorAll(selectors: "body"): NodeListOf<HTMLBodyElement>;
-    querySelectorAll(selectors: "br"): NodeListOf<HTMLBRElement>;
-    querySelectorAll(selectors: "button"): NodeListOf<HTMLButtonElement>;
-    querySelectorAll(selectors: "canvas"): NodeListOf<HTMLCanvasElement>;
-    querySelectorAll(selectors: "caption"): NodeListOf<HTMLTableCaptionElement>;
-    querySelectorAll(selectors: "center"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "circle"): NodeListOf<SVGCircleElement>;
-    querySelectorAll(selectors: "cite"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "clippath"): NodeListOf<SVGClipPathElement>;
-    querySelectorAll(selectors: "code"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "col"): NodeListOf<HTMLTableColElement>;
-    querySelectorAll(selectors: "colgroup"): NodeListOf<HTMLTableColElement>;
-    querySelectorAll(selectors: "datalist"): NodeListOf<HTMLDataListElement>;
-    querySelectorAll(selectors: "dd"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "defs"): NodeListOf<SVGDefsElement>;
-    querySelectorAll(selectors: "del"): NodeListOf<HTMLModElement>;
-    querySelectorAll(selectors: "desc"): NodeListOf<SVGDescElement>;
-    querySelectorAll(selectors: "dfn"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "dir"): NodeListOf<HTMLDirectoryElement>;
-    querySelectorAll(selectors: "div"): NodeListOf<HTMLDivElement>;
-    querySelectorAll(selectors: "dl"): NodeListOf<HTMLDListElement>;
-    querySelectorAll(selectors: "dt"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "ellipse"): NodeListOf<SVGEllipseElement>;
-    querySelectorAll(selectors: "em"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "embed"): NodeListOf<HTMLEmbedElement>;
-    querySelectorAll(selectors: "feblend"): NodeListOf<SVGFEBlendElement>;
-    querySelectorAll(selectors: "fecolormatrix"): NodeListOf<SVGFEColorMatrixElement>;
-    querySelectorAll(selectors: "fecomponenttransfer"): NodeListOf<SVGFEComponentTransferElement>;
-    querySelectorAll(selectors: "fecomposite"): NodeListOf<SVGFECompositeElement>;
-    querySelectorAll(selectors: "feconvolvematrix"): NodeListOf<SVGFEConvolveMatrixElement>;
-    querySelectorAll(selectors: "fediffuselighting"): NodeListOf<SVGFEDiffuseLightingElement>;
-    querySelectorAll(selectors: "fedisplacementmap"): NodeListOf<SVGFEDisplacementMapElement>;
-    querySelectorAll(selectors: "fedistantlight"): NodeListOf<SVGFEDistantLightElement>;
-    querySelectorAll(selectors: "feflood"): NodeListOf<SVGFEFloodElement>;
-    querySelectorAll(selectors: "fefunca"): NodeListOf<SVGFEFuncAElement>;
-    querySelectorAll(selectors: "fefuncb"): NodeListOf<SVGFEFuncBElement>;
-    querySelectorAll(selectors: "fefuncg"): NodeListOf<SVGFEFuncGElement>;
-    querySelectorAll(selectors: "fefuncr"): NodeListOf<SVGFEFuncRElement>;
-    querySelectorAll(selectors: "fegaussianblur"): NodeListOf<SVGFEGaussianBlurElement>;
-    querySelectorAll(selectors: "feimage"): NodeListOf<SVGFEImageElement>;
-    querySelectorAll(selectors: "femerge"): NodeListOf<SVGFEMergeElement>;
-    querySelectorAll(selectors: "femergenode"): NodeListOf<SVGFEMergeNodeElement>;
-    querySelectorAll(selectors: "femorphology"): NodeListOf<SVGFEMorphologyElement>;
-    querySelectorAll(selectors: "feoffset"): NodeListOf<SVGFEOffsetElement>;
-    querySelectorAll(selectors: "fepointlight"): NodeListOf<SVGFEPointLightElement>;
-    querySelectorAll(selectors: "fespecularlighting"): NodeListOf<SVGFESpecularLightingElement>;
-    querySelectorAll(selectors: "fespotlight"): NodeListOf<SVGFESpotLightElement>;
-    querySelectorAll(selectors: "fetile"): NodeListOf<SVGFETileElement>;
-    querySelectorAll(selectors: "feturbulence"): NodeListOf<SVGFETurbulenceElement>;
-    querySelectorAll(selectors: "fieldset"): NodeListOf<HTMLFieldSetElement>;
-    querySelectorAll(selectors: "figcaption"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "figure"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "filter"): NodeListOf<SVGFilterElement>;
-    querySelectorAll(selectors: "font"): NodeListOf<HTMLFontElement>;
-    querySelectorAll(selectors: "footer"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "foreignobject"): NodeListOf<SVGForeignObjectElement>;
-    querySelectorAll(selectors: "form"): NodeListOf<HTMLFormElement>;
-    querySelectorAll(selectors: "frame"): NodeListOf<HTMLFrameElement>;
-    querySelectorAll(selectors: "frameset"): NodeListOf<HTMLFrameSetElement>;
-    querySelectorAll(selectors: "g"): NodeListOf<SVGGElement>;
-    querySelectorAll(selectors: "h1"): NodeListOf<HTMLHeadingElement>;
-    querySelectorAll(selectors: "h2"): NodeListOf<HTMLHeadingElement>;
-    querySelectorAll(selectors: "h3"): NodeListOf<HTMLHeadingElement>;
-    querySelectorAll(selectors: "h4"): NodeListOf<HTMLHeadingElement>;
-    querySelectorAll(selectors: "h5"): NodeListOf<HTMLHeadingElement>;
-    querySelectorAll(selectors: "h6"): NodeListOf<HTMLHeadingElement>;
-    querySelectorAll(selectors: "head"): NodeListOf<HTMLHeadElement>;
-    querySelectorAll(selectors: "header"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "hgroup"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "hr"): NodeListOf<HTMLHRElement>;
-    querySelectorAll(selectors: "html"): NodeListOf<HTMLHtmlElement>;
-    querySelectorAll(selectors: "i"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "iframe"): NodeListOf<HTMLIFrameElement>;
-    querySelectorAll(selectors: "image"): NodeListOf<SVGImageElement>;
-    querySelectorAll(selectors: "img"): NodeListOf<HTMLImageElement>;
-    querySelectorAll(selectors: "input"): NodeListOf<HTMLInputElement>;
-    querySelectorAll(selectors: "ins"): NodeListOf<HTMLModElement>;
-    querySelectorAll(selectors: "isindex"): NodeListOf<HTMLUnknownElement>;
-    querySelectorAll(selectors: "kbd"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "keygen"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "label"): NodeListOf<HTMLLabelElement>;
-    querySelectorAll(selectors: "legend"): NodeListOf<HTMLLegendElement>;
-    querySelectorAll(selectors: "li"): NodeListOf<HTMLLIElement>;
-    querySelectorAll(selectors: "line"): NodeListOf<SVGLineElement>;
-    querySelectorAll(selectors: "lineargradient"): NodeListOf<SVGLinearGradientElement>;
-    querySelectorAll(selectors: "link"): NodeListOf<HTMLLinkElement>;
-    querySelectorAll(selectors: "listing"): NodeListOf<HTMLPreElement>;
-    querySelectorAll(selectors: "map"): NodeListOf<HTMLMapElement>;
-    querySelectorAll(selectors: "mark"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "marker"): NodeListOf<SVGMarkerElement>;
-    querySelectorAll(selectors: "marquee"): NodeListOf<HTMLMarqueeElement>;
-    querySelectorAll(selectors: "mask"): NodeListOf<SVGMaskElement>;
-    querySelectorAll(selectors: "menu"): NodeListOf<HTMLMenuElement>;
-    querySelectorAll(selectors: "meta"): NodeListOf<HTMLMetaElement>;
-    querySelectorAll(selectors: "metadata"): NodeListOf<SVGMetadataElement>;
-    querySelectorAll(selectors: "meter"): NodeListOf<HTMLMeterElement>;
-    querySelectorAll(selectors: "nav"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "nextid"): NodeListOf<HTMLUnknownElement>;
-    querySelectorAll(selectors: "nobr"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "noframes"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "noscript"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "object"): NodeListOf<HTMLObjectElement>;
-    querySelectorAll(selectors: "ol"): NodeListOf<HTMLOListElement>;
-    querySelectorAll(selectors: "optgroup"): NodeListOf<HTMLOptGroupElement>;
-    querySelectorAll(selectors: "option"): NodeListOf<HTMLOptionElement>;
-    querySelectorAll(selectors: "p"): NodeListOf<HTMLParagraphElement>;
-    querySelectorAll(selectors: "param"): NodeListOf<HTMLParamElement>;
-    querySelectorAll(selectors: "path"): NodeListOf<SVGPathElement>;
-    querySelectorAll(selectors: "pattern"): NodeListOf<SVGPatternElement>;
-    querySelectorAll(selectors: "picture"): NodeListOf<HTMLPictureElement>;
-    querySelectorAll(selectors: "plaintext"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "polygon"): NodeListOf<SVGPolygonElement>;
-    querySelectorAll(selectors: "polyline"): NodeListOf<SVGPolylineElement>;
-    querySelectorAll(selectors: "pre"): NodeListOf<HTMLPreElement>;
-    querySelectorAll(selectors: "progress"): NodeListOf<HTMLProgressElement>;
-    querySelectorAll(selectors: "q"): NodeListOf<HTMLQuoteElement>;
-    querySelectorAll(selectors: "radialgradient"): NodeListOf<SVGRadialGradientElement>;
-    querySelectorAll(selectors: "rect"): NodeListOf<SVGRectElement>;
-    querySelectorAll(selectors: "rt"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "ruby"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "s"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "samp"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "script"): NodeListOf<HTMLScriptElement>;
-    querySelectorAll(selectors: "section"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "select"): NodeListOf<HTMLSelectElement>;
-    querySelectorAll(selectors: "small"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "source"): NodeListOf<HTMLSourceElement>;
-    querySelectorAll(selectors: "span"): NodeListOf<HTMLSpanElement>;
-    querySelectorAll(selectors: "stop"): NodeListOf<SVGStopElement>;
-    querySelectorAll(selectors: "strike"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "strong"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "style"): NodeListOf<HTMLStyleElement>;
-    querySelectorAll(selectors: "sub"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "sup"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "svg"): NodeListOf<SVGSVGElement>;
-    querySelectorAll(selectors: "switch"): NodeListOf<SVGSwitchElement>;
-    querySelectorAll(selectors: "symbol"): NodeListOf<SVGSymbolElement>;
-    querySelectorAll(selectors: "table"): NodeListOf<HTMLTableElement>;
-    querySelectorAll(selectors: "tbody"): NodeListOf<HTMLTableSectionElement>;
-    querySelectorAll(selectors: "td"): NodeListOf<HTMLTableDataCellElement>;
-    querySelectorAll(selectors: "template"): NodeListOf<HTMLTemplateElement>;
-    querySelectorAll(selectors: "text"): NodeListOf<SVGTextElement>;
-    querySelectorAll(selectors: "textpath"): NodeListOf<SVGTextPathElement>;
-    querySelectorAll(selectors: "textarea"): NodeListOf<HTMLTextAreaElement>;
-    querySelectorAll(selectors: "tfoot"): NodeListOf<HTMLTableSectionElement>;
-    querySelectorAll(selectors: "th"): NodeListOf<HTMLTableHeaderCellElement>;
-    querySelectorAll(selectors: "thead"): NodeListOf<HTMLTableSectionElement>;
-    querySelectorAll(selectors: "title"): NodeListOf<HTMLTitleElement>;
-    querySelectorAll(selectors: "tr"): NodeListOf<HTMLTableRowElement>;
-    querySelectorAll(selectors: "track"): NodeListOf<HTMLTrackElement>;
-    querySelectorAll(selectors: "tspan"): NodeListOf<SVGTSpanElement>;
-    querySelectorAll(selectors: "tt"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "u"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "ul"): NodeListOf<HTMLUListElement>;
-    querySelectorAll(selectors: "use"): NodeListOf<SVGUseElement>;
-    querySelectorAll(selectors: "var"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "video"): NodeListOf<HTMLVideoElement>;
-    querySelectorAll(selectors: "view"): NodeListOf<SVGViewElement>;
-    querySelectorAll(selectors: "wbr"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "x-ms-webview"): NodeListOf<MSHTMLWebViewElement>;
-    querySelectorAll(selectors: "xmp"): NodeListOf<HTMLPreElement>;
-    querySelectorAll(selectors: string): NodeListOf<Element>;
-}
-
-interface RandomSource {
-    getRandomValues(array: ArrayBufferView): ArrayBufferView;
-}
-
-interface SVGAnimatedPathData {
-    readonly pathSegList: SVGPathSegList;
-}
-
-interface SVGAnimatedPoints {
-    readonly animatedPoints: SVGPointList;
-    readonly points: SVGPointList;
-}
-
-interface SVGExternalResourcesRequired {
-    readonly externalResourcesRequired: SVGAnimatedBoolean;
-}
-
-interface SVGFilterPrimitiveStandardAttributes extends SVGStylable {
-    readonly height: SVGAnimatedLength;
-    readonly result: SVGAnimatedString;
-    readonly width: SVGAnimatedLength;
-    readonly x: SVGAnimatedLength;
-    readonly y: SVGAnimatedLength;
-}
-
-interface SVGFitToViewBox {
-    readonly preserveAspectRatio: SVGAnimatedPreserveAspectRatio;
-    readonly viewBox: SVGAnimatedRect;
-}
-
-interface SVGLangSpace {
-    xmllang: string;
-    xmlspace: string;
-}
-
-interface SVGLocatable {
-    readonly farthestViewportElement: SVGElement;
-    readonly nearestViewportElement: SVGElement;
-    getBBox(): SVGRect;
-    getCTM(): SVGMatrix;
-    getScreenCTM(): SVGMatrix;
-    getTransformToElement(element: SVGElement): SVGMatrix;
-}
-
-interface SVGStylable {
-    className: any;
-    readonly style: CSSStyleDeclaration;
-}
-
-interface SVGTests {
-    readonly requiredExtensions: SVGStringList;
-    readonly requiredFeatures: SVGStringList;
-    readonly systemLanguage: SVGStringList;
-    hasExtension(extension: string): boolean;
-}
-
-interface SVGTransformable extends SVGLocatable {
-    readonly transform: SVGAnimatedTransformList;
-}
-
-interface SVGURIReference {
-    readonly href: SVGAnimatedString;
-}
-
-interface WindowBase64 {
-    atob(encodedString: string): string;
-    btoa(rawString: string): string;
-}
-
-interface WindowConsole {
-    readonly console: Console;
-}
-
-interface WindowLocalStorage {
-    readonly localStorage: Storage;
-}
-
-interface WindowSessionStorage {
-    readonly sessionStorage: Storage;
-}
-
-interface WindowTimers extends Object, WindowTimersExtension {
-    clearInterval(handle: number): void;
-    clearTimeout(handle: number): void;
-    setInterval(handler: (...args: any[]) => void, timeout: number): number;
-    setInterval(handler: any, timeout?: any, ...args: any[]): number;
-    setTimeout(handler: (...args: any[]) => void, timeout: number): number;
-    setTimeout(handler: any, timeout?: any, ...args: any[]): number;
-}
-
-interface WindowTimersExtension {
-    clearImmediate(handle: number): void;
-    setImmediate(handler: (...args: any[]) => void): number;
-    setImmediate(handler: any, ...args: any[]): number;
-}
-
-interface XMLHttpRequestEventTarget {
-    onabort: (this: this, ev: Event) => any;
-    onerror: (this: this, ev: ErrorEvent) => any;
-    onload: (this: this, ev: Event) => any;
-    onloadend: (this: this, ev: ProgressEvent) => any;
-    onloadstart: (this: this, ev: Event) => any;
-    onprogress: (this: this, ev: ProgressEvent) => any;
-    ontimeout: (this: this, ev: ProgressEvent) => any;
-    addEventListener(type: "abort", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadend", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "progress", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "timeout", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-interface StorageEventInit extends EventInit {
-    key?: string;
-    oldValue?: string;
-    newValue?: string;
-    url: string;
-    storageArea?: Storage;
-}
-
-interface Canvas2DContextAttributes {
-    alpha?: boolean;
-    willReadFrequently?: boolean;
-    storage?: boolean;
-    [attribute: string]: boolean | string | undefined;
-}
-
-interface NodeListOf<TNode extends Node> extends NodeList {
-    length: number;
-    item(index: number): TNode;
-    [index: number]: TNode;
-}
-
-interface HTMLCollectionOf<T extends Element> extends HTMLCollection {
-    item(index: number): T;
-    namedItem(name: string): T;
-    [index: number]: T;
-}
-
-interface BlobPropertyBag {
-    type?: string;
-    endings?: string;
-}
-
-interface FilePropertyBag {
-    type?: string;
-    lastModified?: number;
-}
-
-interface EventListenerObject {
-    handleEvent(evt: Event): void;
-}
-
-interface MessageEventInit extends EventInit {
-    data?: any;
-    origin?: string;
-    lastEventId?: string;
-    channel?: string;
-    source?: any;
-    ports?: MessagePort[];
-}
-
-interface ProgressEventInit extends EventInit {
-    lengthComputable?: boolean;
-    loaded?: number;
-    total?: number;
-}
-
-interface ScrollOptions {
-    behavior?: ScrollBehavior;
-}
-
-interface ScrollToOptions extends ScrollOptions {
-    left?: number;
-    top?: number;
-}
-
-interface ScrollIntoViewOptions extends ScrollOptions {
-    block?: ScrollLogicalPosition;
-    inline?: ScrollLogicalPosition;
-}
-
-interface ClipboardEventInit extends EventInit {
-    data?: string;
-    dataType?: string;
-}
-
-interface IDBArrayKey extends Array<IDBValidKey> {
-}
-
-interface RsaKeyGenParams extends Algorithm {
-    modulusLength: number;
-    publicExponent: Uint8Array;
-}
-
-interface RsaHashedKeyGenParams extends RsaKeyGenParams {
-    hash: AlgorithmIdentifier;
-}
-
-interface RsaKeyAlgorithm extends KeyAlgorithm {
-    modulusLength: number;
-    publicExponent: Uint8Array;
-}
-
-interface RsaHashedKeyAlgorithm extends RsaKeyAlgorithm {
-    hash: AlgorithmIdentifier;
-}
-
-interface RsaHashedImportParams {
-    hash: AlgorithmIdentifier;
-}
-
-interface RsaPssParams {
-    saltLength: number;
-}
-
-interface RsaOaepParams extends Algorithm {
-    label?: BufferSource;
-}
-
-interface EcdsaParams extends Algorithm {
-    hash: AlgorithmIdentifier;
-}
-
-interface EcKeyGenParams extends Algorithm {
-    namedCurve: string;
-}
-
-interface EcKeyAlgorithm extends KeyAlgorithm {
-    typedCurve: string;
-}
-
-interface EcKeyImportParams {
-    namedCurve: string;
-}
-
-interface EcdhKeyDeriveParams extends Algorithm {
-    public: CryptoKey;
-}
-
-interface AesCtrParams extends Algorithm {
-    counter: BufferSource;
-    length: number;
-}
-
-interface AesKeyAlgorithm extends KeyAlgorithm {
-    length: number;
-}
-
-interface AesKeyGenParams extends Algorithm {
-    length: number;
-}
-
-interface AesDerivedKeyParams extends Algorithm {
-    length: number;
-}
-
-interface AesCbcParams extends Algorithm {
-    iv: BufferSource;
-}
-
-interface AesCmacParams extends Algorithm {
-    length: number;
-}
-
-interface AesGcmParams extends Algorithm {
-    iv: BufferSource;
-    additionalData?: BufferSource;
-    tagLength?: number;
-}
-
-interface AesCfbParams extends Algorithm {
-    iv: BufferSource;
-}
-
-interface HmacImportParams extends Algorithm {
-    hash?: AlgorithmIdentifier;
-    length?: number;
-}
-
-interface HmacKeyAlgorithm extends KeyAlgorithm {
-    hash: AlgorithmIdentifier;
-    length: number;
-}
-
-interface HmacKeyGenParams extends Algorithm {
-    hash: AlgorithmIdentifier;
-    length?: number;
-}
-
-interface DhKeyGenParams extends Algorithm {
-    prime: Uint8Array;
-    generator: Uint8Array;
-}
-
-interface DhKeyAlgorithm extends KeyAlgorithm {
-    prime: Uint8Array;
-    generator: Uint8Array;
-}
-
-interface DhKeyDeriveParams extends Algorithm {
-    public: CryptoKey;
-}
-
-interface DhImportKeyParams extends Algorithm {
-    prime: Uint8Array;
-    generator: Uint8Array;
-}
-
-interface ConcatParams extends Algorithm {
-    hash?: AlgorithmIdentifier;
-    algorithmId: Uint8Array;
-    partyUInfo: Uint8Array;
-    partyVInfo: Uint8Array;
-    publicInfo?: Uint8Array;
-    privateInfo?: Uint8Array;
-}
-
-interface HkdfCtrParams extends Algorithm {
-    hash: AlgorithmIdentifier;
-    label: BufferSource;
-    context: BufferSource;
-}
-
-interface Pbkdf2Params extends Algorithm {
-    salt: BufferSource;
-    iterations: number;
-    hash: AlgorithmIdentifier;
-}
-
-interface RsaOtherPrimesInfo {
-    r: string;
-    d: string;
-    t: string;
-}
-
-interface JsonWebKey {
-    kty: string;
-    use?: string;
-    key_ops?: string[];
-    alg?: string;
-    kid?: string;
-    x5u?: string;
-    x5c?: string;
-    x5t?: string;
-    ext?: boolean;
-    crv?: string;
-    x?: string;
-    y?: string;
-    d?: string;
-    n?: string;
-    e?: string;
-    p?: string;
-    q?: string;
-    dp?: string;
-    dq?: string;
-    qi?: string;
-    oth?: RsaOtherPrimesInfo[];
-    k?: string;
-}
-
-interface ParentNode {
-    readonly children: HTMLCollection;
-    readonly firstElementChild: Element;
-    readonly lastElementChild: Element;
-    readonly childElementCount: number;
-}
-
-declare type EventListenerOrEventListenerObject = EventListener | EventListenerObject;
-
-interface ErrorEventHandler {
-    (message: string, filename?: string, lineno?: number, colno?: number, error?:Error): void;
-}
-interface PositionCallback {
-    (position: Position): void;
-}
-interface PositionErrorCallback {
-    (error: PositionError): void;
-}
-interface MediaQueryListListener {
-    (mql: MediaQueryList): void;
-}
-interface MSLaunchUriCallback {
-    (): void;
-}
-interface FrameRequestCallback {
-    (time: number): void;
-}
-interface MSUnsafeFunctionCallback {
-    (): any;
-}
-interface MSExecAtPriorityFunctionCallback {
-    (...args: any[]): any;
-}
-interface MutationCallback {
-    (mutations: MutationRecord[], observer: MutationObserver): void;
-}
-interface DecodeSuccessCallback {
-    (decodedData: AudioBuffer): void;
-}
-interface DecodeErrorCallback {
-    (error: DOMException): void;
-}
-interface FunctionStringCallback {
-    (data: string): void;
-}
-interface NavigatorUserMediaSuccessCallback {
-    (stream: MediaStream): void;
-}
-interface NavigatorUserMediaErrorCallback {
-    (error: MediaStreamError): void;
-}
-interface ForEachCallback {
-    (keyId: any, status: string): void;
-}
-declare var Audio: {new(src?: string): HTMLAudioElement; };
-declare var Image: {new(width?: number, height?: number): HTMLImageElement; };
-declare var Option: {new(text?: string, value?: string, defaultSelected?: boolean, selected?: boolean): HTMLOptionElement; };
-declare var applicationCache: ApplicationCache;
-declare var clientInformation: Navigator;
-declare var closed: boolean;
-declare var crypto: Crypto;
-declare var defaultStatus: string;
-declare var devicePixelRatio: number;
-declare var doNotTrack: string;
-declare var document: Document;
-declare var event: Event;
-declare var external: External;
-declare var frameElement: Element;
-declare var frames: Window;
-declare var history: History;
-declare var innerHeight: number;
-declare var innerWidth: number;
-declare var length: number;
-declare var location: Location;
-declare var locationbar: BarProp;
-declare var menubar: BarProp;
-declare var msCredentials: MSCredentials;
-declare const name: never;
-declare var navigator: Navigator;
-declare var offscreenBuffering: string | boolean;
-declare var onabort: (this: Window, ev: UIEvent) => any;
-declare var onafterprint: (this: Window, ev: Event) => any;
-declare var onbeforeprint: (this: Window, ev: Event) => any;
-declare var onbeforeunload: (this: Window, ev: BeforeUnloadEvent) => any;
-declare var onblur: (this: Window, ev: FocusEvent) => any;
-declare var oncanplay: (this: Window, ev: Event) => any;
-declare var oncanplaythrough: (this: Window, ev: Event) => any;
-declare var onchange: (this: Window, ev: Event) => any;
-declare var onclick: (this: Window, ev: MouseEvent) => any;
-declare var oncompassneedscalibration: (this: Window, ev: Event) => any;
-declare var oncontextmenu: (this: Window, ev: PointerEvent) => any;
-declare var ondblclick: (this: Window, ev: MouseEvent) => any;
-declare var ondevicelight: (this: Window, ev: DeviceLightEvent) => any;
-declare var ondevicemotion: (this: Window, ev: DeviceMotionEvent) => any;
-declare var ondeviceorientation: (this: Window, ev: DeviceOrientationEvent) => any;
-declare var ondrag: (this: Window, ev: DragEvent) => any;
-declare var ondragend: (this: Window, ev: DragEvent) => any;
-declare var ondragenter: (this: Window, ev: DragEvent) => any;
-declare var ondragleave: (this: Window, ev: DragEvent) => any;
-declare var ondragover: (this: Window, ev: DragEvent) => any;
-declare var ondragstart: (this: Window, ev: DragEvent) => any;
-declare var ondrop: (this: Window, ev: DragEvent) => any;
-declare var ondurationchange: (this: Window, ev: Event) => any;
-declare var onemptied: (this: Window, ev: Event) => any;
-declare var onended: (this: Window, ev: MediaStreamErrorEvent) => any;
-declare var onerror: ErrorEventHandler;
-declare var onfocus: (this: Window, ev: FocusEvent) => any;
-declare var onhashchange: (this: Window, ev: HashChangeEvent) => any;
-declare var oninput: (this: Window, ev: Event) => any;
-declare var oninvalid: (this: Window, ev: Event) => any;
-declare var onkeydown: (this: Window, ev: KeyboardEvent) => any;
-declare var onkeypress: (this: Window, ev: KeyboardEvent) => any;
-declare var onkeyup: (this: Window, ev: KeyboardEvent) => any;
-declare var onload: (this: Window, ev: Event) => any;
-declare var onloadeddata: (this: Window, ev: Event) => any;
-declare var onloadedmetadata: (this: Window, ev: Event) => any;
-declare var onloadstart: (this: Window, ev: Event) => any;
-declare var onmessage: (this: Window, ev: MessageEvent) => any;
-declare var onmousedown: (this: Window, ev: MouseEvent) => any;
-declare var onmouseenter: (this: Window, ev: MouseEvent) => any;
-declare var onmouseleave: (this: Window, ev: MouseEvent) => any;
-declare var onmousemove: (this: Window, ev: MouseEvent) => any;
-declare var onmouseout: (this: Window, ev: MouseEvent) => any;
-declare var onmouseover: (this: Window, ev: MouseEvent) => any;
-declare var onmouseup: (this: Window, ev: MouseEvent) => any;
-declare var onmousewheel: (this: Window, ev: WheelEvent) => any;
-declare var onmsgesturechange: (this: Window, ev: MSGestureEvent) => any;
-declare var onmsgesturedoubletap: (this: Window, ev: MSGestureEvent) => any;
-declare var onmsgestureend: (this: Window, ev: MSGestureEvent) => any;
-declare var onmsgesturehold: (this: Window, ev: MSGestureEvent) => any;
-declare var onmsgesturestart: (this: Window, ev: MSGestureEvent) => any;
-declare var onmsgesturetap: (this: Window, ev: MSGestureEvent) => any;
-declare var onmsinertiastart: (this: Window, ev: MSGestureEvent) => any;
-declare var onmspointercancel: (this: Window, ev: MSPointerEvent) => any;
-declare var onmspointerdown: (this: Window, ev: MSPointerEvent) => any;
-declare var onmspointerenter: (this: Window, ev: MSPointerEvent) => any;
-declare var onmspointerleave: (this: Window, ev: MSPointerEvent) => any;
-declare var onmspointermove: (this: Window, ev: MSPointerEvent) => any;
-declare var onmspointerout: (this: Window, ev: MSPointerEvent) => any;
-declare var onmspointerover: (this: Window, ev: MSPointerEvent) => any;
-declare var onmspointerup: (this: Window, ev: MSPointerEvent) => any;
-declare var onoffline: (this: Window, ev: Event) => any;
-declare var ononline: (this: Window, ev: Event) => any;
-declare var onorientationchange: (this: Window, ev: Event) => any;
-declare var onpagehide: (this: Window, ev: PageTransitionEvent) => any;
-declare var onpageshow: (this: Window, ev: PageTransitionEvent) => any;
-declare var onpause: (this: Window, ev: Event) => any;
-declare var onplay: (this: Window, ev: Event) => any;
-declare var onplaying: (this: Window, ev: Event) => any;
-declare var onpopstate: (this: Window, ev: PopStateEvent) => any;
-declare var onprogress: (this: Window, ev: ProgressEvent) => any;
-declare var onratechange: (this: Window, ev: Event) => any;
-declare var onreadystatechange: (this: Window, ev: ProgressEvent) => any;
-declare var onreset: (this: Window, ev: Event) => any;
-declare var onresize: (this: Window, ev: UIEvent) => any;
-declare var onscroll: (this: Window, ev: UIEvent) => any;
-declare var onseeked: (this: Window, ev: Event) => any;
-declare var onseeking: (this: Window, ev: Event) => any;
-declare var onselect: (this: Window, ev: UIEvent) => any;
-declare var onstalled: (this: Window, ev: Event) => any;
-declare var onstorage: (this: Window, ev: StorageEvent) => any;
-declare var onsubmit: (this: Window, ev: Event) => any;
-declare var onsuspend: (this: Window, ev: Event) => any;
-declare var ontimeupdate: (this: Window, ev: Event) => any;
-declare var ontouchcancel: (ev: TouchEvent) => any;
-declare var ontouchend: (ev: TouchEvent) => any;
-declare var ontouchmove: (ev: TouchEvent) => any;
-declare var ontouchstart: (ev: TouchEvent) => any;
-declare var onunload: (this: Window, ev: Event) => any;
-declare var onvolumechange: (this: Window, ev: Event) => any;
-declare var onwaiting: (this: Window, ev: Event) => any;
-declare var opener: any;
-declare var orientation: string | number;
-declare var outerHeight: number;
-declare var outerWidth: number;
-declare var pageXOffset: number;
-declare var pageYOffset: number;
-declare var parent: Window;
-declare var performance: Performance;
-declare var personalbar: BarProp;
-declare var screen: Screen;
-declare var screenLeft: number;
-declare var screenTop: number;
-declare var screenX: number;
-declare var screenY: number;
-declare var scrollX: number;
-declare var scrollY: number;
-declare var scrollbars: BarProp;
-declare var self: Window;
-declare var status: string;
-declare var statusbar: BarProp;
-declare var styleMedia: StyleMedia;
-declare var toolbar: BarProp;
-declare var top: Window;
-declare var window: Window;
-declare function alert(message?: any): void;
-declare function blur(): void;
-declare function cancelAnimationFrame(handle: number): void;
-declare function captureEvents(): void;
-declare function close(): void;
-declare function confirm(message?: string): boolean;
-declare function focus(): void;
-declare function getComputedStyle(elt: Element, pseudoElt?: string): CSSStyleDeclaration;
-declare function getMatchedCSSRules(elt: Element, pseudoElt?: string): CSSRuleList;
-declare function getSelection(): Selection;
-declare function matchMedia(mediaQuery: string): MediaQueryList;
-declare function moveBy(x?: number, y?: number): void;
-declare function moveTo(x?: number, y?: number): void;
-declare function msWriteProfilerMark(profilerMarkName: string): void;
-declare function open(url?: string, target?: string, features?: string, replace?: boolean): Window;
-declare function postMessage(message: any, targetOrigin: string, transfer?: any[]): void;
-declare function print(): void;
-declare function prompt(message?: string, _default?: string): string | null;
-declare function releaseEvents(): void;
-declare function requestAnimationFrame(callback: FrameRequestCallback): number;
-declare function resizeBy(x?: number, y?: number): void;
-declare function resizeTo(x?: number, y?: number): void;
-declare function scroll(x?: number, y?: number): void;
-declare function scrollBy(x?: number, y?: number): void;
-declare function scrollTo(x?: number, y?: number): void;
-declare function webkitCancelAnimationFrame(handle: number): void;
-declare function webkitConvertPointFromNodeToPage(node: Node, pt: WebKitPoint): WebKitPoint;
-declare function webkitConvertPointFromPageToNode(node: Node, pt: WebKitPoint): WebKitPoint;
-declare function webkitRequestAnimationFrame(callback: FrameRequestCallback): number;
-declare function scroll(options?: ScrollToOptions): void;
-declare function scrollTo(options?: ScrollToOptions): void;
-declare function scrollBy(options?: ScrollToOptions): void;
-declare function toString(): string;
-declare function addEventListener(type: string, listener?: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-declare function dispatchEvent(evt: Event): boolean;
-declare function removeEventListener(type: string, listener?: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-declare function clearInterval(handle: number): void;
-declare function clearTimeout(handle: number): void;
-declare function setInterval(handler: (...args: any[]) => void, timeout: number): number;
-declare function setInterval(handler: any, timeout?: any, ...args: any[]): number;
-declare function setTimeout(handler: (...args: any[]) => void, timeout: number): number;
-declare function setTimeout(handler: any, timeout?: any, ...args: any[]): number;
-declare function clearImmediate(handle: number): void;
-declare function setImmediate(handler: (...args: any[]) => void): number;
-declare function setImmediate(handler: any, ...args: any[]): number;
-declare var sessionStorage: Storage;
-declare var localStorage: Storage;
-declare var console: Console;
-declare var onpointercancel: (this: Window, ev: PointerEvent) => any;
-declare var onpointerdown: (this: Window, ev: PointerEvent) => any;
-declare var onpointerenter: (this: Window, ev: PointerEvent) => any;
-declare var onpointerleave: (this: Window, ev: PointerEvent) => any;
-declare var onpointermove: (this: Window, ev: PointerEvent) => any;
-declare var onpointerout: (this: Window, ev: PointerEvent) => any;
-declare var onpointerover: (this: Window, ev: PointerEvent) => any;
-declare var onpointerup: (this: Window, ev: PointerEvent) => any;
-declare var onwheel: (this: Window, ev: WheelEvent) => any;
-declare var indexedDB: IDBFactory;
-declare function atob(encodedString: string): string;
-declare function btoa(rawString: string): string;
-declare function addEventListener(type: "MSGestureChange", listener: (this: Window, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "MSGestureDoubleTap", listener: (this: Window, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "MSGestureEnd", listener: (this: Window, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "MSGestureHold", listener: (this: Window, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "MSGestureStart", listener: (this: Window, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "MSGestureTap", listener: (this: Window, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "MSInertiaStart", listener: (this: Window, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "MSPointerCancel", listener: (this: Window, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "MSPointerDown", listener: (this: Window, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "MSPointerEnter", listener: (this: Window, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "MSPointerLeave", listener: (this: Window, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "MSPointerMove", listener: (this: Window, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "MSPointerOut", listener: (this: Window, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "MSPointerOver", listener: (this: Window, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "MSPointerUp", listener: (this: Window, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "abort", listener: (this: Window, ev: UIEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "afterprint", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "beforeprint", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "beforeunload", listener: (this: Window, ev: BeforeUnloadEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "blur", listener: (this: Window, ev: FocusEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "canplay", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "canplaythrough", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "change", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "click", listener: (this: Window, ev: MouseEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "compassneedscalibration", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "contextmenu", listener: (this: Window, ev: PointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "dblclick", listener: (this: Window, ev: MouseEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "devicelight", listener: (this: Window, ev: DeviceLightEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "devicemotion", listener: (this: Window, ev: DeviceMotionEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "deviceorientation", listener: (this: Window, ev: DeviceOrientationEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "drag", listener: (this: Window, ev: DragEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "dragend", listener: (this: Window, ev: DragEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "dragenter", listener: (this: Window, ev: DragEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "dragleave", listener: (this: Window, ev: DragEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "dragover", listener: (this: Window, ev: DragEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "dragstart", listener: (this: Window, ev: DragEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "drop", listener: (this: Window, ev: DragEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "durationchange", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "emptied", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "ended", listener: (this: Window, ev: MediaStreamErrorEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "focus", listener: (this: Window, ev: FocusEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "hashchange", listener: (this: Window, ev: HashChangeEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "input", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "invalid", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "keydown", listener: (this: Window, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "keypress", listener: (this: Window, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "keyup", listener: (this: Window, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "load", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "loadeddata", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "loadedmetadata", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "loadstart", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "message", listener: (this: Window, ev: MessageEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "mousedown", listener: (this: Window, ev: MouseEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "mouseenter", listener: (this: Window, ev: MouseEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "mouseleave", listener: (this: Window, ev: MouseEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "mousemove", listener: (this: Window, ev: MouseEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "mouseout", listener: (this: Window, ev: MouseEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "mouseover", listener: (this: Window, ev: MouseEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "mouseup", listener: (this: Window, ev: MouseEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "mousewheel", listener: (this: Window, ev: WheelEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "offline", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "online", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "orientationchange", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "pagehide", listener: (this: Window, ev: PageTransitionEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "pageshow", listener: (this: Window, ev: PageTransitionEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "pause", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "play", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "playing", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "pointercancel", listener: (this: Window, ev: PointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "pointerdown", listener: (this: Window, ev: PointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "pointerenter", listener: (this: Window, ev: PointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "pointerleave", listener: (this: Window, ev: PointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "pointermove", listener: (this: Window, ev: PointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "pointerout", listener: (this: Window, ev: PointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "pointerover", listener: (this: Window, ev: PointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "pointerup", listener: (this: Window, ev: PointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "popstate", listener: (this: Window, ev: PopStateEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "progress", listener: (this: Window, ev: ProgressEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "ratechange", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "readystatechange", listener: (this: Window, ev: ProgressEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "reset", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "resize", listener: (this: Window, ev: UIEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "scroll", listener: (this: Window, ev: UIEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "seeked", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "seeking", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "select", listener: (this: Window, ev: UIEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "stalled", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "storage", listener: (this: Window, ev: StorageEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "submit", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "suspend", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "timeupdate", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "unload", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "volumechange", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "waiting", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "wheel", listener: (this: Window, ev: WheelEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-type AAGUID = string;
-type AlgorithmIdentifier = string | Algorithm;
-type ConstrainBoolean = boolean | ConstrainBooleanParameters;
-type ConstrainDOMString = string | string[] | ConstrainDOMStringParameters;
-type ConstrainDouble = number | ConstrainDoubleRange;
-type ConstrainLong = number | ConstrainLongRange;
-type CryptoOperationData = ArrayBufferView;
-type GLbitfield = number;
-type GLboolean = boolean;
-type GLbyte = number;
-type GLclampf = number;
-type GLenum = number;
-type GLfloat = number;
-type GLint = number;
-type GLintptr = number;
-type GLshort = number;
-type GLsizei = number;
-type GLsizeiptr = number;
-type GLubyte = number;
-type GLuint = number;
-type GLushort = number;
-type IDBKeyPath = string;
-type KeyFormat = string;
-type KeyType = string;
-type KeyUsage = string;
-type MSInboundPayload = MSVideoRecvPayload | MSAudioRecvPayload;
-type MSLocalClientEvent = MSLocalClientEventBase | MSAudioLocalClientEvent;
-type MSOutboundPayload = MSVideoSendPayload | MSAudioSendPayload;
-type RTCIceGatherCandidate = RTCIceCandidate | RTCIceCandidateComplete;
-type RTCTransport = RTCDtlsTransport | RTCSrtpSdesTransport;
-type payloadtype = number;
-type ScrollBehavior = "auto" | "instant" | "smooth";
-type ScrollLogicalPosition = "start" | "center" | "end" | "nearest";
-type IDBValidKey = number | string | Date | IDBArrayKey;
-type BufferSource = ArrayBuffer | ArrayBufferView;
-type MouseWheelEvent = WheelEvent;
-type ScrollRestoration = "auto" | "manual";
\ No newline at end of file
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved. 
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0  
+ 
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
+MERCHANTABLITY OR NON-INFRINGEMENT. 
+ 
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+
+
+
+/// <reference no-default-lib="true"/>
+
+
+
+/////////////////////////////
+/// DOM APIs
+/////////////////////////////
+
+interface Account {
+    displayName?: string;
+    id?: string;
+    imageURL?: string;
+    name?: string;
+    rpDisplayName?: string;
+}
+
+interface Algorithm {
+    name: string;
+}
+
+interface AnimationEventInit extends EventInit {
+    animationName?: string;
+    elapsedTime?: number;
+}
+
+interface AssertionOptions {
+    allowList?: ScopedCredentialDescriptor[];
+    extensions?: WebAuthnExtensions;
+    rpId?: USVString;
+    timeoutSeconds?: number;
+}
+
+interface CacheQueryOptions {
+    cacheName?: string;
+    ignoreMethod?: boolean;
+    ignoreSearch?: boolean;
+    ignoreVary?: boolean;
+}
+
+interface ClientData {
+    challenge?: string;
+    extensions?: WebAuthnExtensions;
+    hashAlg?: string | Algorithm;
+    origin?: string;
+    rpId?: string;
+    tokenBinding?: string;
+}
+
+interface CloseEventInit extends EventInit {
+    code?: number;
+    reason?: string;
+    wasClean?: boolean;
+}
+
+interface CompositionEventInit extends UIEventInit {
+    data?: string;
+}
+
+interface ConfirmSiteSpecificExceptionsInformation extends ExceptionInformation {
+    arrayOfDomainStrings?: string[];
+}
+
+interface ConstrainBooleanParameters {
+    exact?: boolean;
+    ideal?: boolean;
+}
+
+interface ConstrainDOMStringParameters {
+    exact?: string | string[];
+    ideal?: string | string[];
+}
+
+interface ConstrainDoubleRange extends DoubleRange {
+    exact?: number;
+    ideal?: number;
+}
+
+interface ConstrainLongRange extends LongRange {
+    exact?: number;
+    ideal?: number;
+}
+
+interface ConstrainVideoFacingModeParameters {
+    exact?: VideoFacingModeEnum | VideoFacingModeEnum[];
+    ideal?: VideoFacingModeEnum | VideoFacingModeEnum[];
+}
+
+interface CustomEventInit extends EventInit {
+    detail?: any;
+}
+
+interface DeviceAccelerationDict {
+    x?: number;
+    y?: number;
+    z?: number;
+}
+
+interface DeviceLightEventInit extends EventInit {
+    value?: number;
+}
+
+interface DeviceMotionEventInit extends EventInit {
+    acceleration?: DeviceAccelerationDict;
+    accelerationIncludingGravity?: DeviceAccelerationDict;
+    interval?: number;
+    rotationRate?: DeviceRotationRateDict;
+}
+
+interface DeviceOrientationEventInit extends EventInit {
+    absolute?: boolean;
+    alpha?: number;
+    beta?: number;
+    gamma?: number;
+}
+
+interface DeviceRotationRateDict {
+    alpha?: number;
+    beta?: number;
+    gamma?: number;
+}
+
+interface DOMRectInit {
+    height?: any;
+    width?: any;
+    x?: any;
+    y?: any;
+}
+
+interface DoubleRange {
+    max?: number;
+    min?: number;
+}
+
+interface ErrorEventInit extends EventInit {
+    colno?: number;
+    error?: any;
+    filename?: string;
+    lineno?: number;
+    message?: string;
+}
+
+interface EventInit {
+    scoped?: boolean;
+    bubbles?: boolean;
+    cancelable?: boolean;
+}
+
+interface EventModifierInit extends UIEventInit {
+    altKey?: boolean;
+    ctrlKey?: boolean;
+    metaKey?: boolean;
+    modifierAltGraph?: boolean;
+    modifierCapsLock?: boolean;
+    modifierFn?: boolean;
+    modifierFnLock?: boolean;
+    modifierHyper?: boolean;
+    modifierNumLock?: boolean;
+    modifierOS?: boolean;
+    modifierScrollLock?: boolean;
+    modifierSuper?: boolean;
+    modifierSymbol?: boolean;
+    modifierSymbolLock?: boolean;
+    shiftKey?: boolean;
+}
+
+interface ExceptionInformation {
+    domain?: string;
+}
+
+interface FocusEventInit extends UIEventInit {
+    relatedTarget?: EventTarget;
+}
+
+interface FocusNavigationEventInit extends EventInit {
+    navigationReason?: string;
+    originHeight?: number;
+    originLeft?: number;
+    originTop?: number;
+    originWidth?: number;
+}
+
+interface FocusNavigationOrigin {
+    originHeight?: number;
+    originLeft?: number;
+    originTop?: number;
+    originWidth?: number;
+}
+
+interface GamepadEventInit extends EventInit {
+    gamepad?: Gamepad;
+}
+
+interface GetNotificationOptions {
+    tag?: string;
+}
+
+interface HashChangeEventInit extends EventInit {
+    newURL?: string;
+    oldURL?: string;
+}
+
+interface IDBIndexParameters {
+    multiEntry?: boolean;
+    unique?: boolean;
+}
+
+interface IDBObjectStoreParameters {
+    autoIncrement?: boolean;
+    keyPath?: IDBKeyPath;
+}
+
+interface IntersectionObserverEntryInit {
+    boundingClientRect?: DOMRectInit;
+    intersectionRect?: DOMRectInit;
+    rootBounds?: DOMRectInit;
+    target?: Element;
+    time?: number;
+}
+
+interface IntersectionObserverInit {
+    root?: Element;
+    rootMargin?: string;
+    threshold?: number | number[];
+}
+
+interface KeyAlgorithm {
+    name?: string;
+}
+
+interface KeyboardEventInit extends EventModifierInit {
+    code?: string;
+    key?: string;
+    location?: number;
+    repeat?: boolean;
+}
+
+interface LongRange {
+    max?: number;
+    min?: number;
+}
+
+interface MediaEncryptedEventInit extends EventInit {
+    initData?: ArrayBuffer;
+    initDataType?: string;
+}
+
+interface MediaKeyMessageEventInit extends EventInit {
+    message?: ArrayBuffer;
+    messageType?: MediaKeyMessageType;
+}
+
+interface MediaKeySystemConfiguration {
+    audioCapabilities?: MediaKeySystemMediaCapability[];
+    distinctiveIdentifier?: MediaKeysRequirement;
+    initDataTypes?: string[];
+    persistentState?: MediaKeysRequirement;
+    videoCapabilities?: MediaKeySystemMediaCapability[];
+}
+
+interface MediaKeySystemMediaCapability {
+    contentType?: string;
+    robustness?: string;
+}
+
+interface MediaStreamConstraints {
+    audio?: boolean | MediaTrackConstraints;
+    video?: boolean | MediaTrackConstraints;
+}
+
+interface MediaStreamErrorEventInit extends EventInit {
+    error?: MediaStreamError;
+}
+
+interface MediaStreamEventInit extends EventInit {
+    stream?: MediaStream;
+}
+
+interface MediaStreamTrackEventInit extends EventInit {
+    track?: MediaStreamTrack;
+}
+
+interface MediaTrackCapabilities {
+    aspectRatio?: number | DoubleRange;
+    deviceId?: string;
+    echoCancellation?: boolean[];
+    facingMode?: string;
+    frameRate?: number | DoubleRange;
+    groupId?: string;
+    height?: number | LongRange;
+    sampleRate?: number | LongRange;
+    sampleSize?: number | LongRange;
+    volume?: number | DoubleRange;
+    width?: number | LongRange;
+}
+
+interface MediaTrackConstraints extends MediaTrackConstraintSet {
+    advanced?: MediaTrackConstraintSet[];
+}
+
+interface MediaTrackConstraintSet {
+    aspectRatio?: number | ConstrainDoubleRange;
+    deviceId?: string | string[] | ConstrainDOMStringParameters;
+    echoCancelation?: boolean | ConstrainBooleanParameters;
+    facingMode?: string | string[] | ConstrainDOMStringParameters;
+    frameRate?: number | ConstrainDoubleRange;
+    groupId?: string | string[] | ConstrainDOMStringParameters;
+    height?: number | ConstrainLongRange;
+    sampleRate?: number | ConstrainLongRange;
+    sampleSize?: number | ConstrainLongRange;
+    volume?: number | ConstrainDoubleRange;
+    width?: number | ConstrainLongRange;
+}
+
+interface MediaTrackSettings {
+    aspectRatio?: number;
+    deviceId?: string;
+    echoCancellation?: boolean;
+    facingMode?: string;
+    frameRate?: number;
+    groupId?: string;
+    height?: number;
+    sampleRate?: number;
+    sampleSize?: number;
+    volume?: number;
+    width?: number;
+}
+
+interface MediaTrackSupportedConstraints {
+    aspectRatio?: boolean;
+    deviceId?: boolean;
+    echoCancellation?: boolean;
+    facingMode?: boolean;
+    frameRate?: boolean;
+    groupId?: boolean;
+    height?: boolean;
+    sampleRate?: boolean;
+    sampleSize?: boolean;
+    volume?: boolean;
+    width?: boolean;
+}
+
+interface MessageEventInit extends EventInit {
+    lastEventId?: string;
+    channel?: string;
+    data?: any;
+    origin?: string;
+    ports?: MessagePort[];
+    source?: Window;
+}
+
+interface MouseEventInit extends EventModifierInit {
+    button?: number;
+    buttons?: number;
+    clientX?: number;
+    clientY?: number;
+    relatedTarget?: EventTarget;
+    screenX?: number;
+    screenY?: number;
+}
+
+interface MSAccountInfo {
+    accountImageUri?: string;
+    accountName?: string;
+    rpDisplayName?: string;
+    userDisplayName?: string;
+    userId?: string;
+}
+
+interface MSAudioLocalClientEvent extends MSLocalClientEventBase {
+    cpuInsufficientEventRatio?: number;
+    deviceCaptureNotFunctioningEventRatio?: number;
+    deviceClippingEventRatio?: number;
+    deviceEchoEventRatio?: number;
+    deviceGlitchesEventRatio?: number;
+    deviceHalfDuplexAECEventRatio?: number;
+    deviceHowlingEventCount?: number;
+    deviceLowSNREventRatio?: number;
+    deviceLowSpeechLevelEventRatio?: number;
+    deviceMultipleEndpointsEventCount?: number;
+    deviceNearEndToEchoRatioEventRatio?: number;
+    deviceRenderMuteEventRatio?: number;
+    deviceRenderNotFunctioningEventRatio?: number;
+    deviceRenderZeroVolumeEventRatio?: number;
+    networkDelayEventRatio?: number;
+    networkSendQualityEventRatio?: number;
+}
+
+interface MSAudioRecvPayload extends MSPayloadBase {
+    burstLossLength1?: number;
+    burstLossLength2?: number;
+    burstLossLength3?: number;
+    burstLossLength4?: number;
+    burstLossLength5?: number;
+    burstLossLength6?: number;
+    burstLossLength7?: number;
+    burstLossLength8OrHigher?: number;
+    fecRecvDistance1?: number;
+    fecRecvDistance2?: number;
+    fecRecvDistance3?: number;
+    packetReorderDepthAvg?: number;
+    packetReorderDepthMax?: number;
+    packetReorderRatio?: number;
+    ratioCompressedSamplesAvg?: number;
+    ratioConcealedSamplesAvg?: number;
+    ratioStretchedSamplesAvg?: number;
+    samplingRate?: number;
+    signal?: MSAudioRecvSignal;
+}
+
+interface MSAudioRecvSignal {
+    initialSignalLevelRMS?: number;
+    recvNoiseLevelCh1?: number;
+    recvSignalLevelCh1?: number;
+    renderLoopbackSignalLevel?: number;
+    renderNoiseLevel?: number;
+    renderSignalLevel?: number;
+}
+
+interface MSAudioSendPayload extends MSPayloadBase {
+    audioFECUsed?: boolean;
+    samplingRate?: number;
+    sendMutePercent?: number;
+    signal?: MSAudioSendSignal;
+}
+
+interface MSAudioSendSignal {
+    noiseLevel?: number;
+    sendNoiseLevelCh1?: number;
+    sendSignalLevelCh1?: number;
+}
+
+interface MSConnectivity {
+    iceType?: MSIceType;
+    iceWarningFlags?: MSIceWarningFlags;
+    relayAddress?: MSRelayAddress;
+}
+
+interface MSCredentialFilter {
+    accept?: MSCredentialSpec[];
+}
+
+interface MSCredentialParameters {
+    type?: MSCredentialType;
+}
+
+interface MSCredentialSpec {
+    id?: string;
+    type?: MSCredentialType;
+}
+
+interface MSDelay {
+    roundTrip?: number;
+    roundTripMax?: number;
+}
+
+interface MSDescription extends RTCStats {
+    connectivity?: MSConnectivity;
+    deviceDevName?: string;
+    localAddr?: MSIPAddressInfo;
+    networkconnectivity?: MSNetworkConnectivityInfo;
+    reflexiveLocalIPAddr?: MSIPAddressInfo;
+    remoteAddr?: MSIPAddressInfo;
+    transport?: RTCIceProtocol;
+}
+
+interface MSFIDOCredentialParameters extends MSCredentialParameters {
+    algorithm?: string | Algorithm;
+    authenticators?: AAGUID[];
+}
+
+interface MSIceWarningFlags {
+    allocationMessageIntegrityFailed?: boolean;
+    alternateServerReceived?: boolean;
+    connCheckMessageIntegrityFailed?: boolean;
+    connCheckOtherError?: boolean;
+    fipsAllocationFailure?: boolean;
+    multipleRelayServersAttempted?: boolean;
+    noRelayServersConfigured?: boolean;
+    portRangeExhausted?: boolean;
+    pseudoTLSFailure?: boolean;
+    tcpNatConnectivityFailed?: boolean;
+    tcpRelayConnectivityFailed?: boolean;
+    turnAuthUnknownUsernameError?: boolean;
+    turnTcpAllocateFailed?: boolean;
+    turnTcpSendFailed?: boolean;
+    turnTcpTimedOut?: boolean;
+    turnTurnTcpConnectivityFailed?: boolean;
+    turnUdpAllocateFailed?: boolean;
+    turnUdpSendFailed?: boolean;
+    udpLocalConnectivityFailed?: boolean;
+    udpNatConnectivityFailed?: boolean;
+    udpRelayConnectivityFailed?: boolean;
+    useCandidateChecksFailed?: boolean;
+}
+
+interface MSIPAddressInfo {
+    ipAddr?: string;
+    manufacturerMacAddrMask?: string;
+    port?: number;
+}
+
+interface MSJitter {
+    interArrival?: number;
+    interArrivalMax?: number;
+    interArrivalSD?: number;
+}
+
+interface MSLocalClientEventBase extends RTCStats {
+    networkBandwidthLowEventRatio?: number;
+    networkReceiveQualityEventRatio?: number;
+}
+
+interface MSNetwork extends RTCStats {
+    delay?: MSDelay;
+    jitter?: MSJitter;
+    packetLoss?: MSPacketLoss;
+    utilization?: MSUtilization;
+}
+
+interface MSNetworkConnectivityInfo {
+    linkspeed?: number;
+    networkConnectionDetails?: string;
+    vpn?: boolean;
+}
+
+interface MSNetworkInterfaceType {
+    interfaceTypeEthernet?: boolean;
+    interfaceTypePPP?: boolean;
+    interfaceTypeTunnel?: boolean;
+    interfaceTypeWireless?: boolean;
+    interfaceTypeWWAN?: boolean;
+}
+
+interface MSOutboundNetwork extends MSNetwork {
+    appliedBandwidthLimit?: number;
+}
+
+interface MSPacketLoss {
+    lossRate?: number;
+    lossRateMax?: number;
+}
+
+interface MSPayloadBase extends RTCStats {
+    payloadDescription?: string;
+}
+
+interface MSPortRange {
+    max?: number;
+    min?: number;
+}
+
+interface MSRelayAddress {
+    port?: number;
+    relayAddress?: string;
+}
+
+interface MSSignatureParameters {
+    userPrompt?: string;
+}
+
+interface MSTransportDiagnosticsStats extends RTCStats {
+    allocationTimeInMs?: number;
+    baseAddress?: string;
+    baseInterface?: MSNetworkInterfaceType;
+    iceRole?: RTCIceRole;
+    iceWarningFlags?: MSIceWarningFlags;
+    interfaces?: MSNetworkInterfaceType;
+    localAddress?: string;
+    localAddrType?: MSIceAddrType;
+    localInterface?: MSNetworkInterfaceType;
+    localMR?: string;
+    localMRTCPPort?: number;
+    localSite?: string;
+    msRtcEngineVersion?: string;
+    networkName?: string;
+    numConsentReqReceived?: number;
+    numConsentReqSent?: number;
+    numConsentRespReceived?: number;
+    numConsentRespSent?: number;
+    portRangeMax?: number;
+    portRangeMin?: number;
+    protocol?: RTCIceProtocol;
+    remoteAddress?: string;
+    remoteAddrType?: MSIceAddrType;
+    remoteMR?: string;
+    remoteMRTCPPort?: number;
+    remoteSite?: string;
+    rtpRtcpMux?: boolean;
+    stunVer?: number;
+}
+
+interface MSUtilization {
+    bandwidthEstimation?: number;
+    bandwidthEstimationAvg?: number;
+    bandwidthEstimationMax?: number;
+    bandwidthEstimationMin?: number;
+    bandwidthEstimationStdDev?: number;
+    packets?: number;
+}
+
+interface MSVideoPayload extends MSPayloadBase {
+    durationSeconds?: number;
+    resolution?: string;
+    videoBitRateAvg?: number;
+    videoBitRateMax?: number;
+    videoFrameRateAvg?: number;
+    videoPacketLossRate?: number;
+}
+
+interface MSVideoRecvPayload extends MSVideoPayload {
+    lowBitRateCallPercent?: number;
+    lowFrameRateCallPercent?: number;
+    recvBitRateAverage?: number;
+    recvBitRateMaximum?: number;
+    recvCodecType?: string;
+    recvFpsHarmonicAverage?: number;
+    recvFrameRateAverage?: number;
+    recvNumResSwitches?: number;
+    recvReorderBufferMaxSuccessfullyOrderedExtent?: number;
+    recvReorderBufferMaxSuccessfullyOrderedLateTime?: number;
+    recvReorderBufferPacketsDroppedDueToBufferExhaustion?: number;
+    recvReorderBufferPacketsDroppedDueToTimeout?: number;
+    recvReorderBufferReorderedPackets?: number;
+    recvResolutionHeight?: number;
+    recvResolutionWidth?: number;
+    recvVideoStreamsMax?: number;
+    recvVideoStreamsMin?: number;
+    recvVideoStreamsMode?: number;
+    reorderBufferTotalPackets?: number;
+    videoFrameLossRate?: number;
+    videoPostFECPLR?: number;
+    videoResolutions?: MSVideoResolutionDistribution;
+}
+
+interface MSVideoResolutionDistribution {
+    cifQuality?: number;
+    h1080Quality?: number;
+    h1440Quality?: number;
+    h2160Quality?: number;
+    h720Quality?: number;
+    vgaQuality?: number;
+}
+
+interface MSVideoSendPayload extends MSVideoPayload {
+    sendBitRateAverage?: number;
+    sendBitRateMaximum?: number;
+    sendFrameRateAverage?: number;
+    sendResolutionHeight?: number;
+    sendResolutionWidth?: number;
+    sendVideoStreamsMax?: number;
+}
+
+interface MsZoomToOptions {
+    animate?: string;
+    contentX?: number;
+    contentY?: number;
+    scaleFactor?: number;
+    viewportX?: string;
+    viewportY?: string;
+}
+
+interface MutationObserverInit {
+    attributeFilter?: string[];
+    attributeOldValue?: boolean;
+    attributes?: boolean;
+    characterData?: boolean;
+    characterDataOldValue?: boolean;
+    childList?: boolean;
+    subtree?: boolean;
+}
+
+interface NotificationOptions {
+    body?: string;
+    dir?: NotificationDirection;
+    icon?: string;
+    lang?: string;
+    tag?: string;
+}
+
+interface ObjectURLOptions {
+    oneTimeOnly?: boolean;
+}
+
+interface PaymentCurrencyAmount {
+    currency?: string;
+    currencySystem?: string;
+    value?: string;
+}
+
+interface PaymentDetails {
+    displayItems?: PaymentItem[];
+    error?: string;
+    modifiers?: PaymentDetailsModifier[];
+    shippingOptions?: PaymentShippingOption[];
+    total?: PaymentItem;
+}
+
+interface PaymentDetailsModifier {
+    additionalDisplayItems?: PaymentItem[];
+    data?: any;
+    supportedMethods?: string[];
+    total?: PaymentItem;
+}
+
+interface PaymentItem {
+    amount?: PaymentCurrencyAmount;
+    label?: string;
+    pending?: boolean;
+}
+
+interface PaymentMethodData {
+    data?: any;
+    supportedMethods?: string[];
+}
+
+interface PaymentOptions {
+    requestPayerEmail?: boolean;
+    requestPayerName?: boolean;
+    requestPayerPhone?: boolean;
+    requestShipping?: boolean;
+    shippingType?: string;
+}
+
+interface PaymentRequestUpdateEventInit extends EventInit {
+}
+
+interface PaymentShippingOption {
+    amount?: PaymentCurrencyAmount;
+    id?: string;
+    label?: string;
+    selected?: boolean;
+}
+
+interface PeriodicWaveConstraints {
+    disableNormalization?: boolean;
+}
+
+interface PointerEventInit extends MouseEventInit {
+    height?: number;
+    isPrimary?: boolean;
+    pointerId?: number;
+    pointerType?: string;
+    pressure?: number;
+    tiltX?: number;
+    tiltY?: number;
+    width?: number;
+}
+
+interface PopStateEventInit extends EventInit {
+    state?: any;
+}
+
+interface PositionOptions {
+    enableHighAccuracy?: boolean;
+    maximumAge?: number;
+    timeout?: number;
+}
+
+interface ProgressEventInit extends EventInit {
+    lengthComputable?: boolean;
+    loaded?: number;
+    total?: number;
+}
+
+interface PushSubscriptionOptionsInit {
+    applicationServerKey?: any;
+    userVisibleOnly?: boolean;
+}
+
+interface RegistrationOptions {
+    scope?: string;
+}
+
+interface RequestInit {
+    body?: any;
+    cache?: RequestCache;
+    credentials?: RequestCredentials;
+    headers?: any;
+    integrity?: string;
+    keepalive?: boolean;
+    method?: string;
+    mode?: RequestMode;
+    redirect?: RequestRedirect;
+    referrer?: string;
+    referrerPolicy?: ReferrerPolicy;
+    window?: any;
+}
+
+interface ResponseInit {
+    headers?: any;
+    status?: number;
+    statusText?: string;
+}
+
+interface RTCConfiguration {
+    bundlePolicy?: RTCBundlePolicy;
+    iceServers?: RTCIceServer[];
+    iceTransportPolicy?: RTCIceTransportPolicy;
+    peerIdentity?: string;
+}
+
+interface RTCDtlsFingerprint {
+    algorithm?: string;
+    value?: string;
+}
+
+interface RTCDtlsParameters {
+    fingerprints?: RTCDtlsFingerprint[];
+    role?: RTCDtlsRole;
+}
+
+interface RTCDTMFToneChangeEventInit extends EventInit {
+    tone?: string;
+}
+
+interface RTCIceCandidateAttributes extends RTCStats {
+    addressSourceUrl?: string;
+    candidateType?: RTCStatsIceCandidateType;
+    ipAddress?: string;
+    portNumber?: number;
+    priority?: number;
+    transport?: string;
+}
+
+interface RTCIceCandidateComplete {
+}
+
+interface RTCIceCandidateDictionary {
+    foundation?: string;
+    ip?: string;
+    msMTurnSessionId?: string;
+    port?: number;
+    priority?: number;
+    protocol?: RTCIceProtocol;
+    relatedAddress?: string;
+    relatedPort?: number;
+    tcpType?: RTCIceTcpCandidateType;
+    type?: RTCIceCandidateType;
+}
+
+interface RTCIceCandidateInit {
+    candidate?: string;
+    sdpMid?: string;
+    sdpMLineIndex?: number;
+}
+
+interface RTCIceCandidatePair {
+    local?: RTCIceCandidateDictionary;
+    remote?: RTCIceCandidateDictionary;
+}
+
+interface RTCIceCandidatePairStats extends RTCStats {
+    availableIncomingBitrate?: number;
+    availableOutgoingBitrate?: number;
+    bytesReceived?: number;
+    bytesSent?: number;
+    localCandidateId?: string;
+    nominated?: boolean;
+    priority?: number;
+    readable?: boolean;
+    remoteCandidateId?: string;
+    roundTripTime?: number;
+    state?: RTCStatsIceCandidatePairState;
+    transportId?: string;
+    writable?: boolean;
+}
+
+interface RTCIceGatherOptions {
+    gatherPolicy?: RTCIceGatherPolicy;
+    iceservers?: RTCIceServer[];
+    portRange?: MSPortRange;
+}
+
+interface RTCIceParameters {
+    iceLite?: boolean;
+    password?: string;
+    usernameFragment?: string;
+}
+
+interface RTCIceServer {
+    credential?: string;
+    urls?: any;
+    username?: string;
+}
+
+interface RTCInboundRTPStreamStats extends RTCRTPStreamStats {
+    bytesReceived?: number;
+    fractionLost?: number;
+    jitter?: number;
+    packetsLost?: number;
+    packetsReceived?: number;
+}
+
+interface RTCMediaStreamTrackStats extends RTCStats {
+    audioLevel?: number;
+    echoReturnLoss?: number;
+    echoReturnLossEnhancement?: number;
+    frameHeight?: number;
+    framesCorrupted?: number;
+    framesDecoded?: number;
+    framesDropped?: number;
+    framesPerSecond?: number;
+    framesReceived?: number;
+    framesSent?: number;
+    frameWidth?: number;
+    remoteSource?: boolean;
+    ssrcIds?: string[];
+    trackIdentifier?: string;
+}
+
+interface RTCOfferOptions {
+    iceRestart?: boolean;
+    offerToReceiveAudio?: number;
+    offerToReceiveVideo?: number;
+    voiceActivityDetection?: boolean;
+}
+
+interface RTCOutboundRTPStreamStats extends RTCRTPStreamStats {
+    bytesSent?: number;
+    packetsSent?: number;
+    roundTripTime?: number;
+    targetBitrate?: number;
+}
+
+interface RTCPeerConnectionIceEventInit extends EventInit {
+    candidate?: RTCIceCandidate;
+}
+
+interface RTCRtcpFeedback {
+    parameter?: string;
+    type?: string;
+}
+
+interface RTCRtcpParameters {
+    cname?: string;
+    mux?: boolean;
+    reducedSize?: boolean;
+    ssrc?: number;
+}
+
+interface RTCRtpCapabilities {
+    codecs?: RTCRtpCodecCapability[];
+    fecMechanisms?: string[];
+    headerExtensions?: RTCRtpHeaderExtension[];
+}
+
+interface RTCRtpCodecCapability {
+    clockRate?: number;
+    kind?: string;
+    maxptime?: number;
+    maxSpatialLayers?: number;
+    maxTemporalLayers?: number;
+    name?: string;
+    numChannels?: number;
+    options?: any;
+    parameters?: any;
+    preferredPayloadType?: number;
+    ptime?: number;
+    rtcpFeedback?: RTCRtcpFeedback[];
+    svcMultiStreamSupport?: boolean;
+}
+
+interface RTCRtpCodecParameters {
+    clockRate?: number;
+    maxptime?: number;
+    name?: string;
+    numChannels?: number;
+    parameters?: any;
+    payloadType?: any;
+    ptime?: number;
+    rtcpFeedback?: RTCRtcpFeedback[];
+}
+
+interface RTCRtpContributingSource {
+    audioLevel?: number;
+    csrc?: number;
+    timestamp?: number;
+}
+
+interface RTCRtpEncodingParameters {
+    active?: boolean;
+    codecPayloadType?: number;
+    dependencyEncodingIds?: string[];
+    encodingId?: string;
+    fec?: RTCRtpFecParameters;
+    framerateScale?: number;
+    maxBitrate?: number;
+    maxFramerate?: number;
+    minQuality?: number;
+    priority?: number;
+    resolutionScale?: number;
+    rtx?: RTCRtpRtxParameters;
+    ssrc?: number;
+    ssrcRange?: RTCSsrcRange;
+}
+
+interface RTCRtpFecParameters {
+    mechanism?: string;
+    ssrc?: number;
+}
+
+interface RTCRtpHeaderExtension {
+    kind?: string;
+    preferredEncrypt?: boolean;
+    preferredId?: number;
+    uri?: string;
+}
+
+interface RTCRtpHeaderExtensionParameters {
+    encrypt?: boolean;
+    id?: number;
+    uri?: string;
+}
+
+interface RTCRtpParameters {
+    codecs?: RTCRtpCodecParameters[];
+    degradationPreference?: RTCDegradationPreference;
+    encodings?: RTCRtpEncodingParameters[];
+    headerExtensions?: RTCRtpHeaderExtensionParameters[];
+    muxId?: string;
+    rtcp?: RTCRtcpParameters;
+}
+
+interface RTCRtpRtxParameters {
+    ssrc?: number;
+}
+
+interface RTCRTPStreamStats extends RTCStats {
+    associateStatsId?: string;
+    codecId?: string;
+    firCount?: number;
+    isRemote?: boolean;
+    mediaTrackId?: string;
+    nackCount?: number;
+    pliCount?: number;
+    sliCount?: number;
+    ssrc?: string;
+    transportId?: string;
+}
+
+interface RTCRtpUnhandled {
+    muxId?: string;
+    payloadType?: number;
+    ssrc?: number;
+}
+
+interface RTCSessionDescriptionInit {
+    sdp?: string;
+    type?: RTCSdpType;
+}
+
+interface RTCSrtpKeyParam {
+    keyMethod?: string;
+    keySalt?: string;
+    lifetime?: string;
+    mkiLength?: number;
+    mkiValue?: number;
+}
+
+interface RTCSrtpSdesParameters {
+    cryptoSuite?: string;
+    keyParams?: RTCSrtpKeyParam[];
+    sessionParams?: string[];
+    tag?: number;
+}
+
+interface RTCSsrcRange {
+    max?: number;
+    min?: number;
+}
+
+interface RTCStats {
+    id?: string;
+    msType?: MSStatsType;
+    timestamp?: number;
+    type?: RTCStatsType;
+}
+
+interface RTCStatsReport {
+}
+
+interface RTCTransportStats extends RTCStats {
+    activeConnection?: boolean;
+    bytesReceived?: number;
+    bytesSent?: number;
+    localCertificateId?: string;
+    remoteCertificateId?: string;
+    rtcpTransportStatsId?: string;
+    selectedCandidatePairId?: string;
+}
+
+interface ScopedCredentialDescriptor {
+    id?: any;
+    transports?: Transport[];
+    type?: ScopedCredentialType;
+}
+
+interface ScopedCredentialOptions {
+    excludeList?: ScopedCredentialDescriptor[];
+    extensions?: WebAuthnExtensions;
+    rpId?: USVString;
+    timeoutSeconds?: number;
+}
+
+interface ScopedCredentialParameters {
+    algorithm?: string | Algorithm;
+    type?: ScopedCredentialType;
+}
+
+interface ServiceWorkerMessageEventInit extends EventInit {
+    data?: any;
+    lastEventId?: string;
+    origin?: string;
+    ports?: MessagePort[];
+    source?: ServiceWorker | MessagePort;
+}
+
+interface SpeechSynthesisEventInit extends EventInit {
+    charIndex?: number;
+    elapsedTime?: number;
+    name?: string;
+    utterance?: SpeechSynthesisUtterance;
+}
+
+interface StoreExceptionsInformation extends ExceptionInformation {
+    detailURI?: string;
+    explanationString?: string;
+    siteName?: string;
+}
+
+interface StoreSiteSpecificExceptionsInformation extends StoreExceptionsInformation {
+    arrayOfDomainStrings?: string[];
+}
+
+interface TrackEventInit extends EventInit {
+    track?: VideoTrack | AudioTrack | TextTrack;
+}
+
+interface TransitionEventInit extends EventInit {
+    elapsedTime?: number;
+    propertyName?: string;
+}
+
+interface UIEventInit extends EventInit {
+    detail?: number;
+    view?: Window;
+}
+
+interface WebAuthnExtensions {
+}
+
+interface WebGLContextAttributes {
+    failIfMajorPerformanceCaveat?: boolean;
+    alpha?: boolean;
+    antialias?: boolean;
+    depth?: boolean;
+    premultipliedAlpha?: boolean;
+    preserveDrawingBuffer?: boolean;
+    stencil?: boolean;
+}
+
+interface WebGLContextEventInit extends EventInit {
+    statusMessage?: string;
+}
+
+interface WheelEventInit extends MouseEventInit {
+    deltaMode?: number;
+    deltaX?: number;
+    deltaY?: number;
+    deltaZ?: number;
+}
+
+interface EventListener {
+    (evt: Event): void;
+}
+
+interface WebKitEntriesCallback {
+    (evt: Event): void;
+}
+
+interface WebKitErrorCallback {
+    (evt: Event): void;
+}
+
+interface WebKitFileCallback {
+    (evt: Event): void;
+}
+
+interface AnalyserNode extends AudioNode {
+    fftSize: number;
+    readonly frequencyBinCount: number;
+    maxDecibels: number;
+    minDecibels: number;
+    smoothingTimeConstant: number;
+    getByteFrequencyData(array: Uint8Array): void;
+    getByteTimeDomainData(array: Uint8Array): void;
+    getFloatFrequencyData(array: Float32Array): void;
+    getFloatTimeDomainData(array: Float32Array): void;
+}
+
+declare var AnalyserNode: {
+    prototype: AnalyserNode;
+    new(): AnalyserNode;
+};
+
+interface ANGLE_instanced_arrays {
+    drawArraysInstancedANGLE(mode: number, first: number, count: number, primcount: number): void;
+    drawElementsInstancedANGLE(mode: number, count: number, type: number, offset: number, primcount: number): void;
+    vertexAttribDivisorANGLE(index: number, divisor: number): void;
+    readonly VERTEX_ATTRIB_ARRAY_DIVISOR_ANGLE: number;
+}
+
+declare var ANGLE_instanced_arrays: {
+    prototype: ANGLE_instanced_arrays;
+    new(): ANGLE_instanced_arrays;
+    readonly VERTEX_ATTRIB_ARRAY_DIVISOR_ANGLE: number;
+};
+
+interface AnimationEvent extends Event {
+    readonly animationName: string;
+    readonly elapsedTime: number;
+    initAnimationEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, animationNameArg: string, elapsedTimeArg: number): void;
+}
+
+declare var AnimationEvent: {
+    prototype: AnimationEvent;
+    new(typeArg: string, eventInitDict?: AnimationEventInit): AnimationEvent;
+};
+
+interface ApplicationCacheEventMap {
+    "cached": Event;
+    "checking": Event;
+    "downloading": Event;
+    "error": Event;
+    "noupdate": Event;
+    "obsolete": Event;
+    "progress": ProgressEvent;
+    "updateready": Event;
+}
+
+interface ApplicationCache extends EventTarget {
+    oncached: (this: ApplicationCache, ev: Event) => any;
+    onchecking: (this: ApplicationCache, ev: Event) => any;
+    ondownloading: (this: ApplicationCache, ev: Event) => any;
+    onerror: (this: ApplicationCache, ev: Event) => any;
+    onnoupdate: (this: ApplicationCache, ev: Event) => any;
+    onobsolete: (this: ApplicationCache, ev: Event) => any;
+    onprogress: (this: ApplicationCache, ev: ProgressEvent) => any;
+    onupdateready: (this: ApplicationCache, ev: Event) => any;
+    readonly status: number;
+    abort(): void;
+    swapCache(): void;
+    update(): void;
+    readonly CHECKING: number;
+    readonly DOWNLOADING: number;
+    readonly IDLE: number;
+    readonly OBSOLETE: number;
+    readonly UNCACHED: number;
+    readonly UPDATEREADY: number;
+    addEventListener<K extends keyof ApplicationCacheEventMap>(type: K, listener: (this: ApplicationCache, ev: ApplicationCacheEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var ApplicationCache: {
+    prototype: ApplicationCache;
+    new(): ApplicationCache;
+    readonly CHECKING: number;
+    readonly DOWNLOADING: number;
+    readonly IDLE: number;
+    readonly OBSOLETE: number;
+    readonly UNCACHED: number;
+    readonly UPDATEREADY: number;
+};
+
+interface Attr extends Node {
+    readonly name: string;
+    readonly ownerElement: Element;
+    readonly prefix: string | null;
+    readonly specified: boolean;
+    value: string;
+}
+
+declare var Attr: {
+    prototype: Attr;
+    new(): Attr;
+};
+
+interface AudioBuffer {
+    readonly duration: number;
+    readonly length: number;
+    readonly numberOfChannels: number;
+    readonly sampleRate: number;
+    copyFromChannel(destination: Float32Array, channelNumber: number, startInChannel?: number): void;
+    copyToChannel(source: Float32Array, channelNumber: number, startInChannel?: number): void;
+    getChannelData(channel: number): Float32Array;
+}
+
+declare var AudioBuffer: {
+    prototype: AudioBuffer;
+    new(): AudioBuffer;
+};
+
+interface AudioBufferSourceNodeEventMap {
+    "ended": MediaStreamErrorEvent;
+}
+
+interface AudioBufferSourceNode extends AudioNode {
+    buffer: AudioBuffer | null;
+    readonly detune: AudioParam;
+    loop: boolean;
+    loopEnd: number;
+    loopStart: number;
+    onended: (this: AudioBufferSourceNode, ev: MediaStreamErrorEvent) => any;
+    readonly playbackRate: AudioParam;
+    start(when?: number, offset?: number, duration?: number): void;
+    stop(when?: number): void;
+    addEventListener<K extends keyof AudioBufferSourceNodeEventMap>(type: K, listener: (this: AudioBufferSourceNode, ev: AudioBufferSourceNodeEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var AudioBufferSourceNode: {
+    prototype: AudioBufferSourceNode;
+    new(): AudioBufferSourceNode;
+};
+
+interface AudioContextEventMap {
+    "statechange": Event;
+}
+
+interface AudioContextBase extends EventTarget {
+    readonly currentTime: number;
+    readonly destination: AudioDestinationNode;
+    readonly listener: AudioListener;
+    onstatechange: (this: AudioContext, ev: Event) => any;
+    readonly sampleRate: number;
+    readonly state: AudioContextState;
+    close(): Promise<void>;
+    createAnalyser(): AnalyserNode;
+    createBiquadFilter(): BiquadFilterNode;
+    createBuffer(numberOfChannels: number, length: number, sampleRate: number): AudioBuffer;
+    createBufferSource(): AudioBufferSourceNode;
+    createChannelMerger(numberOfInputs?: number): ChannelMergerNode;
+    createChannelSplitter(numberOfOutputs?: number): ChannelSplitterNode;
+    createConvolver(): ConvolverNode;
+    createDelay(maxDelayTime?: number): DelayNode;
+    createDynamicsCompressor(): DynamicsCompressorNode;
+    createGain(): GainNode;
+    createIIRFilter(feedforward: number[], feedback: number[]): IIRFilterNode;
+    createMediaElementSource(mediaElement: HTMLMediaElement): MediaElementAudioSourceNode;
+    createMediaStreamSource(mediaStream: MediaStream): MediaStreamAudioSourceNode;
+    createOscillator(): OscillatorNode;
+    createPanner(): PannerNode;
+    createPeriodicWave(real: Float32Array, imag: Float32Array, constraints?: PeriodicWaveConstraints): PeriodicWave;
+    createScriptProcessor(bufferSize?: number, numberOfInputChannels?: number, numberOfOutputChannels?: number): ScriptProcessorNode;
+    createStereoPanner(): StereoPannerNode;
+    createWaveShaper(): WaveShaperNode;
+    decodeAudioData(audioData: ArrayBuffer, successCallback?: DecodeSuccessCallback, errorCallback?: DecodeErrorCallback): Promise<AudioBuffer>;
+    resume(): Promise<void>;
+    addEventListener<K extends keyof AudioContextEventMap>(type: K, listener: (this: AudioContext, ev: AudioContextEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+interface AudioContext extends AudioContextBase {
+    suspend(): Promise<void>;
+}
+
+declare var AudioContext: {
+    prototype: AudioContext;
+    new(): AudioContext;
+};
+
+interface AudioDestinationNode extends AudioNode {
+    readonly maxChannelCount: number;
+}
+
+declare var AudioDestinationNode: {
+    prototype: AudioDestinationNode;
+    new(): AudioDestinationNode;
+};
+
+interface AudioListener {
+    dopplerFactor: number;
+    speedOfSound: number;
+    setOrientation(x: number, y: number, z: number, xUp: number, yUp: number, zUp: number): void;
+    setPosition(x: number, y: number, z: number): void;
+    setVelocity(x: number, y: number, z: number): void;
+}
+
+declare var AudioListener: {
+    prototype: AudioListener;
+    new(): AudioListener;
+};
+
+interface AudioNode extends EventTarget {
+    channelCount: number;
+    channelCountMode: ChannelCountMode;
+    channelInterpretation: ChannelInterpretation;
+    readonly context: AudioContext;
+    readonly numberOfInputs: number;
+    readonly numberOfOutputs: number;
+    connect(destination: AudioNode, output?: number, input?: number): AudioNode;
+    connect(destination: AudioParam, output?: number): void;
+    disconnect(output?: number): void;
+    disconnect(destination: AudioNode, output?: number, input?: number): void;
+    disconnect(destination: AudioParam, output?: number): void;
+}
+
+declare var AudioNode: {
+    prototype: AudioNode;
+    new(): AudioNode;
+};
+
+interface AudioParam {
+    readonly defaultValue: number;
+    value: number;
+    cancelScheduledValues(startTime: number): AudioParam;
+    exponentialRampToValueAtTime(value: number, endTime: number): AudioParam;
+    linearRampToValueAtTime(value: number, endTime: number): AudioParam;
+    setTargetAtTime(target: number, startTime: number, timeConstant: number): AudioParam;
+    setValueAtTime(value: number, startTime: number): AudioParam;
+    setValueCurveAtTime(values: Float32Array, startTime: number, duration: number): AudioParam;
+}
+
+declare var AudioParam: {
+    prototype: AudioParam;
+    new(): AudioParam;
+};
+
+interface AudioProcessingEvent extends Event {
+    readonly inputBuffer: AudioBuffer;
+    readonly outputBuffer: AudioBuffer;
+    readonly playbackTime: number;
+}
+
+declare var AudioProcessingEvent: {
+    prototype: AudioProcessingEvent;
+    new(): AudioProcessingEvent;
+};
+
+interface AudioTrack {
+    enabled: boolean;
+    readonly id: string;
+    kind: string;
+    readonly label: string;
+    language: string;
+    readonly sourceBuffer: SourceBuffer;
+}
+
+declare var AudioTrack: {
+    prototype: AudioTrack;
+    new(): AudioTrack;
+};
+
+interface AudioTrackListEventMap {
+    "addtrack": TrackEvent;
+    "change": Event;
+    "removetrack": TrackEvent;
+}
+
+interface AudioTrackList extends EventTarget {
+    readonly length: number;
+    onaddtrack: (this: AudioTrackList, ev: TrackEvent) => any;
+    onchange: (this: AudioTrackList, ev: Event) => any;
+    onremovetrack: (this: AudioTrackList, ev: TrackEvent) => any;
+    getTrackById(id: string): AudioTrack | null;
+    item(index: number): AudioTrack;
+    addEventListener<K extends keyof AudioTrackListEventMap>(type: K, listener: (this: AudioTrackList, ev: AudioTrackListEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+    [index: number]: AudioTrack;
+}
+
+declare var AudioTrackList: {
+    prototype: AudioTrackList;
+    new(): AudioTrackList;
+};
+
+interface BarProp {
+    readonly visible: boolean;
+}
+
+declare var BarProp: {
+    prototype: BarProp;
+    new(): BarProp;
+};
+
+interface BeforeUnloadEvent extends Event {
+    returnValue: any;
+}
+
+declare var BeforeUnloadEvent: {
+    prototype: BeforeUnloadEvent;
+    new(): BeforeUnloadEvent;
+};
+
+interface BiquadFilterNode extends AudioNode {
+    readonly detune: AudioParam;
+    readonly frequency: AudioParam;
+    readonly gain: AudioParam;
+    readonly Q: AudioParam;
+    type: BiquadFilterType;
+    getFrequencyResponse(frequencyHz: Float32Array, magResponse: Float32Array, phaseResponse: Float32Array): void;
+}
+
+declare var BiquadFilterNode: {
+    prototype: BiquadFilterNode;
+    new(): BiquadFilterNode;
+};
+
+interface Blob {
+    readonly size: number;
+    readonly type: string;
+    msClose(): void;
+    msDetachStream(): any;
+    slice(start?: number, end?: number, contentType?: string): Blob;
+}
+
+declare var Blob: {
+    prototype: Blob;
+    new (blobParts?: any[], options?: BlobPropertyBag): Blob;
+};
+
+interface Cache {
+    add(request: RequestInfo): Promise<void>;
+    addAll(requests: RequestInfo[]): Promise<void>;
+    delete(request: RequestInfo, options?: CacheQueryOptions): Promise<boolean>;
+    keys(request?: RequestInfo, options?: CacheQueryOptions): any;
+    match(request: RequestInfo, options?: CacheQueryOptions): Promise<Response>;
+    matchAll(request?: RequestInfo, options?: CacheQueryOptions): any;
+    put(request: RequestInfo, response: Response): Promise<void>;
+}
+
+declare var Cache: {
+    prototype: Cache;
+    new(): Cache;
+};
+
+interface CacheStorage {
+    delete(cacheName: string): Promise<boolean>;
+    has(cacheName: string): Promise<boolean>;
+    keys(): any;
+    match(request: RequestInfo, options?: CacheQueryOptions): Promise<any>;
+    open(cacheName: string): Promise<Cache>;
+}
+
+declare var CacheStorage: {
+    prototype: CacheStorage;
+    new(): CacheStorage;
+};
+
+interface CanvasGradient {
+    addColorStop(offset: number, color: string): void;
+}
+
+declare var CanvasGradient: {
+    prototype: CanvasGradient;
+    new(): CanvasGradient;
+};
+
+interface CanvasPattern {
+    setTransform(matrix: SVGMatrix): void;
+}
+
+declare var CanvasPattern: {
+    prototype: CanvasPattern;
+    new(): CanvasPattern;
+};
+
+interface CanvasRenderingContext2D extends Object, CanvasPathMethods {
+    readonly canvas: HTMLCanvasElement;
+    fillStyle: string | CanvasGradient | CanvasPattern;
+    font: string;
+    globalAlpha: number;
+    globalCompositeOperation: string;
+    imageSmoothingEnabled: boolean;
+    lineCap: string;
+    lineDashOffset: number;
+    lineJoin: string;
+    lineWidth: number;
+    miterLimit: number;
+    msFillRule: CanvasFillRule;
+    shadowBlur: number;
+    shadowColor: string;
+    shadowOffsetX: number;
+    shadowOffsetY: number;
+    strokeStyle: string | CanvasGradient | CanvasPattern;
+    textAlign: string;
+    textBaseline: string;
+    mozImageSmoothingEnabled: boolean;
+    webkitImageSmoothingEnabled: boolean;
+    oImageSmoothingEnabled: boolean;
+    beginPath(): void;
+    clearRect(x: number, y: number, w: number, h: number): void;
+    clip(fillRule?: CanvasFillRule): void;
+    createImageData(imageDataOrSw: number | ImageData, sh?: number): ImageData;
+    createLinearGradient(x0: number, y0: number, x1: number, y1: number): CanvasGradient;
+    createPattern(image: HTMLImageElement | HTMLCanvasElement | HTMLVideoElement, repetition: string): CanvasPattern;
+    createRadialGradient(x0: number, y0: number, r0: number, x1: number, y1: number, r1: number): CanvasGradient;
+    drawFocusIfNeeded(element: Element): void;
+    drawImage(image: HTMLImageElement | HTMLCanvasElement | HTMLVideoElement | ImageBitmap, dstX: number, dstY: number): void;
+    drawImage(image: HTMLImageElement | HTMLCanvasElement | HTMLVideoElement | ImageBitmap, dstX: number, dstY: number, dstW: number, dstH: number): void;
+    drawImage(image: HTMLImageElement | HTMLCanvasElement | HTMLVideoElement | ImageBitmap, srcX: number, srcY: number, srcW: number, srcH: number, dstX: number, dstY: number, dstW: number, dstH: number): void;
+    fill(fillRule?: CanvasFillRule): void;
+    fillRect(x: number, y: number, w: number, h: number): void;
+    fillText(text: string, x: number, y: number, maxWidth?: number): void;
+    getImageData(sx: number, sy: number, sw: number, sh: number): ImageData;
+    getLineDash(): number[];
+    isPointInPath(x: number, y: number, fillRule?: CanvasFillRule): boolean;
+    measureText(text: string): TextMetrics;
+    putImageData(imagedata: ImageData, dx: number, dy: number, dirtyX?: number, dirtyY?: number, dirtyWidth?: number, dirtyHeight?: number): void;
+    restore(): void;
+    rotate(angle: number): void;
+    save(): void;
+    scale(x: number, y: number): void;
+    setLineDash(segments: number[]): void;
+    setTransform(m11: number, m12: number, m21: number, m22: number, dx: number, dy: number): void;
+    stroke(path?: Path2D): void;
+    strokeRect(x: number, y: number, w: number, h: number): void;
+    strokeText(text: string, x: number, y: number, maxWidth?: number): void;
+    transform(m11: number, m12: number, m21: number, m22: number, dx: number, dy: number): void;
+    translate(x: number, y: number): void;
+}
+
+declare var CanvasRenderingContext2D: {
+    prototype: CanvasRenderingContext2D;
+    new(): CanvasRenderingContext2D;
+};
+
+interface CDATASection extends Text {
+}
+
+declare var CDATASection: {
+    prototype: CDATASection;
+    new(): CDATASection;
+};
+
+interface ChannelMergerNode extends AudioNode {
+}
+
+declare var ChannelMergerNode: {
+    prototype: ChannelMergerNode;
+    new(): ChannelMergerNode;
+};
+
+interface ChannelSplitterNode extends AudioNode {
+}
+
+declare var ChannelSplitterNode: {
+    prototype: ChannelSplitterNode;
+    new(): ChannelSplitterNode;
+};
+
+interface CharacterData extends Node, ChildNode {
+    data: string;
+    readonly length: number;
+    appendData(arg: string): void;
+    deleteData(offset: number, count: number): void;
+    insertData(offset: number, arg: string): void;
+    replaceData(offset: number, count: number, arg: string): void;
+    substringData(offset: number, count: number): string;
+}
+
+declare var CharacterData: {
+    prototype: CharacterData;
+    new(): CharacterData;
+};
+
+interface ClientRect {
+    bottom: number;
+    readonly height: number;
+    left: number;
+    right: number;
+    top: number;
+    readonly width: number;
+}
+
+declare var ClientRect: {
+    prototype: ClientRect;
+    new(): ClientRect;
+};
+
+interface ClientRectList {
+    readonly length: number;
+    item(index: number): ClientRect;
+    [index: number]: ClientRect;
+}
+
+declare var ClientRectList: {
+    prototype: ClientRectList;
+    new(): ClientRectList;
+};
+
+interface ClipboardEvent extends Event {
+    readonly clipboardData: DataTransfer;
+}
+
+declare var ClipboardEvent: {
+    prototype: ClipboardEvent;
+    new(type: string, eventInitDict?: ClipboardEventInit): ClipboardEvent;
+};
+
+interface CloseEvent extends Event {
+    readonly code: number;
+    readonly reason: string;
+    readonly wasClean: boolean;
+    initCloseEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, wasCleanArg: boolean, codeArg: number, reasonArg: string): void;
+}
+
+declare var CloseEvent: {
+    prototype: CloseEvent;
+    new(typeArg: string, eventInitDict?: CloseEventInit): CloseEvent;
+};
+
+interface Comment extends CharacterData {
+    text: string;
+}
+
+declare var Comment: {
+    prototype: Comment;
+    new(): Comment;
+};
+
+interface CompositionEvent extends UIEvent {
+    readonly data: string;
+    readonly locale: string;
+    initCompositionEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, dataArg: string, locale: string): void;
+}
+
+declare var CompositionEvent: {
+    prototype: CompositionEvent;
+    new(typeArg: string, eventInitDict?: CompositionEventInit): CompositionEvent;
+};
+
+interface Console {
+    assert(test?: boolean, message?: string, ...optionalParams: any[]): void;
+    clear(): void;
+    count(countTitle?: string): void;
+    debug(message?: any, ...optionalParams: any[]): void;
+    dir(value?: any, ...optionalParams: any[]): void;
+    dirxml(value: any): void;
+    error(message?: any, ...optionalParams: any[]): void;
+    exception(message?: string, ...optionalParams: any[]): void;
+    group(groupTitle?: string, ...optionalParams: any[]): void;
+    groupCollapsed(groupTitle?: string, ...optionalParams: any[]): void;
+    groupEnd(): void;
+    info(message?: any, ...optionalParams: any[]): void;
+    log(message?: any, ...optionalParams: any[]): void;
+    msIsIndependentlyComposed(element: Element): boolean;
+    profile(reportName?: string): void;
+    profileEnd(): void;
+    select(element: Element): void;
+    table(...data: any[]): void;
+    time(timerName?: string): void;
+    timeEnd(timerName?: string): void;
+    trace(message?: any, ...optionalParams: any[]): void;
+    warn(message?: any, ...optionalParams: any[]): void;
+}
+
+declare var Console: {
+    prototype: Console;
+    new(): Console;
+};
+
+interface ConvolverNode extends AudioNode {
+    buffer: AudioBuffer | null;
+    normalize: boolean;
+}
+
+declare var ConvolverNode: {
+    prototype: ConvolverNode;
+    new(): ConvolverNode;
+};
+
+interface Coordinates {
+    readonly accuracy: number;
+    readonly altitude: number | null;
+    readonly altitudeAccuracy: number | null;
+    readonly heading: number | null;
+    readonly latitude: number;
+    readonly longitude: number;
+    readonly speed: number | null;
+}
+
+declare var Coordinates: {
+    prototype: Coordinates;
+    new(): Coordinates;
+};
+
+interface Crypto extends Object, RandomSource {
+    readonly subtle: SubtleCrypto;
+}
+
+declare var Crypto: {
+    prototype: Crypto;
+    new(): Crypto;
+};
+
+interface CryptoKey {
+    readonly algorithm: KeyAlgorithm;
+    readonly extractable: boolean;
+    readonly type: string;
+    readonly usages: string[];
+}
+
+declare var CryptoKey: {
+    prototype: CryptoKey;
+    new(): CryptoKey;
+};
+
+interface CryptoKeyPair {
+    privateKey: CryptoKey;
+    publicKey: CryptoKey;
+}
+
+declare var CryptoKeyPair: {
+    prototype: CryptoKeyPair;
+    new(): CryptoKeyPair;
+};
+
+interface CSS {
+    supports(property: string, value?: string): boolean;
+}
+declare var CSS: CSS;
+
+interface CSSConditionRule extends CSSGroupingRule {
+    conditionText: string;
+}
+
+declare var CSSConditionRule: {
+    prototype: CSSConditionRule;
+    new(): CSSConditionRule;
+};
+
+interface CSSFontFaceRule extends CSSRule {
+    readonly style: CSSStyleDeclaration;
+}
+
+declare var CSSFontFaceRule: {
+    prototype: CSSFontFaceRule;
+    new(): CSSFontFaceRule;
+};
+
+interface CSSGroupingRule extends CSSRule {
+    readonly cssRules: CSSRuleList;
+    deleteRule(index: number): void;
+    insertRule(rule: string, index: number): number;
+}
+
+declare var CSSGroupingRule: {
+    prototype: CSSGroupingRule;
+    new(): CSSGroupingRule;
+};
+
+interface CSSImportRule extends CSSRule {
+    readonly href: string;
+    readonly media: MediaList;
+    readonly styleSheet: CSSStyleSheet;
+}
+
+declare var CSSImportRule: {
+    prototype: CSSImportRule;
+    new(): CSSImportRule;
+};
+
+interface CSSKeyframeRule extends CSSRule {
+    keyText: string;
+    readonly style: CSSStyleDeclaration;
+}
+
+declare var CSSKeyframeRule: {
+    prototype: CSSKeyframeRule;
+    new(): CSSKeyframeRule;
+};
+
+interface CSSKeyframesRule extends CSSRule {
+    readonly cssRules: CSSRuleList;
+    name: string;
+    appendRule(rule: string): void;
+    deleteRule(rule: string): void;
+    findRule(rule: string): CSSKeyframeRule;
+}
+
+declare var CSSKeyframesRule: {
+    prototype: CSSKeyframesRule;
+    new(): CSSKeyframesRule;
+};
+
+interface CSSMediaRule extends CSSConditionRule {
+    readonly media: MediaList;
+}
+
+declare var CSSMediaRule: {
+    prototype: CSSMediaRule;
+    new(): CSSMediaRule;
+};
+
+interface CSSNamespaceRule extends CSSRule {
+    readonly namespaceURI: string;
+    readonly prefix: string;
+}
+
+declare var CSSNamespaceRule: {
+    prototype: CSSNamespaceRule;
+    new(): CSSNamespaceRule;
+};
+
+interface CSSPageRule extends CSSRule {
+    readonly pseudoClass: string;
+    readonly selector: string;
+    selectorText: string;
+    readonly style: CSSStyleDeclaration;
+}
+
+declare var CSSPageRule: {
+    prototype: CSSPageRule;
+    new(): CSSPageRule;
+};
+
+interface CSSRule {
+    cssText: string;
+    readonly parentRule: CSSRule;
+    readonly parentStyleSheet: CSSStyleSheet;
+    readonly type: number;
+    readonly CHARSET_RULE: number;
+    readonly FONT_FACE_RULE: number;
+    readonly IMPORT_RULE: number;
+    readonly KEYFRAME_RULE: number;
+    readonly KEYFRAMES_RULE: number;
+    readonly MEDIA_RULE: number;
+    readonly NAMESPACE_RULE: number;
+    readonly PAGE_RULE: number;
+    readonly STYLE_RULE: number;
+    readonly SUPPORTS_RULE: number;
+    readonly UNKNOWN_RULE: number;
+    readonly VIEWPORT_RULE: number;
+}
+
+declare var CSSRule: {
+    prototype: CSSRule;
+    new(): CSSRule;
+    readonly CHARSET_RULE: number;
+    readonly FONT_FACE_RULE: number;
+    readonly IMPORT_RULE: number;
+    readonly KEYFRAME_RULE: number;
+    readonly KEYFRAMES_RULE: number;
+    readonly MEDIA_RULE: number;
+    readonly NAMESPACE_RULE: number;
+    readonly PAGE_RULE: number;
+    readonly STYLE_RULE: number;
+    readonly SUPPORTS_RULE: number;
+    readonly UNKNOWN_RULE: number;
+    readonly VIEWPORT_RULE: number;
+};
+
+interface CSSRuleList {
+    readonly length: number;
+    item(index: number): CSSRule;
+    [index: number]: CSSRule;
+}
+
+declare var CSSRuleList: {
+    prototype: CSSRuleList;
+    new(): CSSRuleList;
+};
+
+interface CSSStyleDeclaration {
+    alignContent: string | null;
+    alignItems: string | null;
+    alignmentBaseline: string | null;
+    alignSelf: string | null;
+    animation: string | null;
+    animationDelay: string | null;
+    animationDirection: string | null;
+    animationDuration: string | null;
+    animationFillMode: string | null;
+    animationIterationCount: string | null;
+    animationName: string | null;
+    animationPlayState: string | null;
+    animationTimingFunction: string | null;
+    backfaceVisibility: string | null;
+    background: string | null;
+    backgroundAttachment: string | null;
+    backgroundClip: string | null;
+    backgroundColor: string | null;
+    backgroundImage: string | null;
+    backgroundOrigin: string | null;
+    backgroundPosition: string | null;
+    backgroundPositionX: string | null;
+    backgroundPositionY: string | null;
+    backgroundRepeat: string | null;
+    backgroundSize: string | null;
+    baselineShift: string | null;
+    border: string | null;
+    borderBottom: string | null;
+    borderBottomColor: string | null;
+    borderBottomLeftRadius: string | null;
+    borderBottomRightRadius: string | null;
+    borderBottomStyle: string | null;
+    borderBottomWidth: string | null;
+    borderCollapse: string | null;
+    borderColor: string | null;
+    borderImage: string | null;
+    borderImageOutset: string | null;
+    borderImageRepeat: string | null;
+    borderImageSlice: string | null;
+    borderImageSource: string | null;
+    borderImageWidth: string | null;
+    borderLeft: string | null;
+    borderLeftColor: string | null;
+    borderLeftStyle: string | null;
+    borderLeftWidth: string | null;
+    borderRadius: string | null;
+    borderRight: string | null;
+    borderRightColor: string | null;
+    borderRightStyle: string | null;
+    borderRightWidth: string | null;
+    borderSpacing: string | null;
+    borderStyle: string | null;
+    borderTop: string | null;
+    borderTopColor: string | null;
+    borderTopLeftRadius: string | null;
+    borderTopRightRadius: string | null;
+    borderTopStyle: string | null;
+    borderTopWidth: string | null;
+    borderWidth: string | null;
+    bottom: string | null;
+    boxShadow: string | null;
+    boxSizing: string | null;
+    breakAfter: string | null;
+    breakBefore: string | null;
+    breakInside: string | null;
+    captionSide: string | null;
+    clear: string | null;
+    clip: string | null;
+    clipPath: string | null;
+    clipRule: string | null;
+    color: string | null;
+    colorInterpolationFilters: string | null;
+    columnCount: any;
+    columnFill: string | null;
+    columnGap: any;
+    columnRule: string | null;
+    columnRuleColor: any;
+    columnRuleStyle: string | null;
+    columnRuleWidth: any;
+    columns: string | null;
+    columnSpan: string | null;
+    columnWidth: any;
+    content: string | null;
+    counterIncrement: string | null;
+    counterReset: string | null;
+    cssFloat: string | null;
+    cssText: string;
+    cursor: string | null;
+    direction: string | null;
+    display: string | null;
+    dominantBaseline: string | null;
+    emptyCells: string | null;
+    enableBackground: string | null;
+    fill: string | null;
+    fillOpacity: string | null;
+    fillRule: string | null;
+    filter: string | null;
+    flex: string | null;
+    flexBasis: string | null;
+    flexDirection: string | null;
+    flexFlow: string | null;
+    flexGrow: string | null;
+    flexShrink: string | null;
+    flexWrap: string | null;
+    floodColor: string | null;
+    floodOpacity: string | null;
+    font: string | null;
+    fontFamily: string | null;
+    fontFeatureSettings: string | null;
+    fontSize: string | null;
+    fontSizeAdjust: string | null;
+    fontStretch: string | null;
+    fontStyle: string | null;
+    fontVariant: string | null;
+    fontWeight: string | null;
+    glyphOrientationHorizontal: string | null;
+    glyphOrientationVertical: string | null;
+    height: string | null;
+    imeMode: string | null;
+    justifyContent: string | null;
+    kerning: string | null;
+    layoutGrid: string | null;
+    layoutGridChar: string | null;
+    layoutGridLine: string | null;
+    layoutGridMode: string | null;
+    layoutGridType: string | null;
+    left: string | null;
+    readonly length: number;
+    letterSpacing: string | null;
+    lightingColor: string | null;
+    lineBreak: string | null;
+    lineHeight: string | null;
+    listStyle: string | null;
+    listStyleImage: string | null;
+    listStylePosition: string | null;
+    listStyleType: string | null;
+    margin: string | null;
+    marginBottom: string | null;
+    marginLeft: string | null;
+    marginRight: string | null;
+    marginTop: string | null;
+    marker: string | null;
+    markerEnd: string | null;
+    markerMid: string | null;
+    markerStart: string | null;
+    mask: string | null;
+    maxHeight: string | null;
+    maxWidth: string | null;
+    minHeight: string | null;
+    minWidth: string | null;
+    msContentZoomChaining: string | null;
+    msContentZooming: string | null;
+    msContentZoomLimit: string | null;
+    msContentZoomLimitMax: any;
+    msContentZoomLimitMin: any;
+    msContentZoomSnap: string | null;
+    msContentZoomSnapPoints: string | null;
+    msContentZoomSnapType: string | null;
+    msFlowFrom: string | null;
+    msFlowInto: string | null;
+    msFontFeatureSettings: string | null;
+    msGridColumn: any;
+    msGridColumnAlign: string | null;
+    msGridColumns: string | null;
+    msGridColumnSpan: any;
+    msGridRow: any;
+    msGridRowAlign: string | null;
+    msGridRows: string | null;
+    msGridRowSpan: any;
+    msHighContrastAdjust: string | null;
+    msHyphenateLimitChars: string | null;
+    msHyphenateLimitLines: any;
+    msHyphenateLimitZone: any;
+    msHyphens: string | null;
+    msImeAlign: string | null;
+    msOverflowStyle: string | null;
+    msScrollChaining: string | null;
+    msScrollLimit: string | null;
+    msScrollLimitXMax: any;
+    msScrollLimitXMin: any;
+    msScrollLimitYMax: any;
+    msScrollLimitYMin: any;
+    msScrollRails: string | null;
+    msScrollSnapPointsX: string | null;
+    msScrollSnapPointsY: string | null;
+    msScrollSnapType: string | null;
+    msScrollSnapX: string | null;
+    msScrollSnapY: string | null;
+    msScrollTranslation: string | null;
+    msTextCombineHorizontal: string | null;
+    msTextSizeAdjust: any;
+    msTouchAction: string | null;
+    msTouchSelect: string | null;
+    msUserSelect: string | null;
+    msWrapFlow: string;
+    msWrapMargin: any;
+    msWrapThrough: string;
+    opacity: string | null;
+    order: string | null;
+    orphans: string | null;
+    outline: string | null;
+    outlineColor: string | null;
+    outlineOffset: string | null;
+    outlineStyle: string | null;
+    outlineWidth: string | null;
+    overflow: string | null;
+    overflowX: string | null;
+    overflowY: string | null;
+    padding: string | null;
+    paddingBottom: string | null;
+    paddingLeft: string | null;
+    paddingRight: string | null;
+    paddingTop: string | null;
+    pageBreakAfter: string | null;
+    pageBreakBefore: string | null;
+    pageBreakInside: string | null;
+    readonly parentRule: CSSRule;
+    perspective: string | null;
+    perspectiveOrigin: string | null;
+    pointerEvents: string | null;
+    position: string | null;
+    quotes: string | null;
+    right: string | null;
+    rotate: string | null;
+    rubyAlign: string | null;
+    rubyOverhang: string | null;
+    rubyPosition: string | null;
+    scale: string | null;
+    stopColor: string | null;
+    stopOpacity: string | null;
+    stroke: string | null;
+    strokeDasharray: string | null;
+    strokeDashoffset: string | null;
+    strokeLinecap: string | null;
+    strokeLinejoin: string | null;
+    strokeMiterlimit: string | null;
+    strokeOpacity: string | null;
+    strokeWidth: string | null;
+    tableLayout: string | null;
+    textAlign: string | null;
+    textAlignLast: string | null;
+    textAnchor: string | null;
+    textDecoration: string | null;
+    textIndent: string | null;
+    textJustify: string | null;
+    textKashida: string | null;
+    textKashidaSpace: string | null;
+    textOverflow: string | null;
+    textShadow: string | null;
+    textTransform: string | null;
+    textUnderlinePosition: string | null;
+    top: string | null;
+    touchAction: string | null;
+    transform: string | null;
+    transformOrigin: string | null;
+    transformStyle: string | null;
+    transition: string | null;
+    transitionDelay: string | null;
+    transitionDuration: string | null;
+    transitionProperty: string | null;
+    transitionTimingFunction: string | null;
+    translate: string | null;
+    unicodeBidi: string | null;
+    verticalAlign: string | null;
+    visibility: string | null;
+    webkitAlignContent: string | null;
+    webkitAlignItems: string | null;
+    webkitAlignSelf: string | null;
+    webkitAnimation: string | null;
+    webkitAnimationDelay: string | null;
+    webkitAnimationDirection: string | null;
+    webkitAnimationDuration: string | null;
+    webkitAnimationFillMode: string | null;
+    webkitAnimationIterationCount: string | null;
+    webkitAnimationName: string | null;
+    webkitAnimationPlayState: string | null;
+    webkitAnimationTimingFunction: string | null;
+    webkitAppearance: string | null;
+    webkitBackfaceVisibility: string | null;
+    webkitBackgroundClip: string | null;
+    webkitBackgroundOrigin: string | null;
+    webkitBackgroundSize: string | null;
+    webkitBorderBottomLeftRadius: string | null;
+    webkitBorderBottomRightRadius: string | null;
+    webkitBorderImage: string | null;
+    webkitBorderRadius: string | null;
+    webkitBorderTopLeftRadius: string | null;
+    webkitBorderTopRightRadius: string | null;
+    webkitBoxAlign: string | null;
+    webkitBoxDirection: string | null;
+    webkitBoxFlex: string | null;
+    webkitBoxOrdinalGroup: string | null;
+    webkitBoxOrient: string | null;
+    webkitBoxPack: string | null;
+    webkitBoxSizing: string | null;
+    webkitColumnBreakAfter: string | null;
+    webkitColumnBreakBefore: string | null;
+    webkitColumnBreakInside: string | null;
+    webkitColumnCount: any;
+    webkitColumnGap: any;
+    webkitColumnRule: string | null;
+    webkitColumnRuleColor: any;
+    webkitColumnRuleStyle: string | null;
+    webkitColumnRuleWidth: any;
+    webkitColumns: string | null;
+    webkitColumnSpan: string | null;
+    webkitColumnWidth: any;
+    webkitFilter: string | null;
+    webkitFlex: string | null;
+    webkitFlexBasis: string | null;
+    webkitFlexDirection: string | null;
+    webkitFlexFlow: string | null;
+    webkitFlexGrow: string | null;
+    webkitFlexShrink: string | null;
+    webkitFlexWrap: string | null;
+    webkitJustifyContent: string | null;
+    webkitOrder: string | null;
+    webkitPerspective: string | null;
+    webkitPerspectiveOrigin: string | null;
+    webkitTapHighlightColor: string | null;
+    webkitTextFillColor: string | null;
+    webkitTextSizeAdjust: any;
+    webkitTextStroke: string | null;
+    webkitTextStrokeColor: string | null;
+    webkitTextStrokeWidth: string | null;
+    webkitTransform: string | null;
+    webkitTransformOrigin: string | null;
+    webkitTransformStyle: string | null;
+    webkitTransition: string | null;
+    webkitTransitionDelay: string | null;
+    webkitTransitionDuration: string | null;
+    webkitTransitionProperty: string | null;
+    webkitTransitionTimingFunction: string | null;
+    webkitUserModify: string | null;
+    webkitUserSelect: string | null;
+    webkitWritingMode: string | null;
+    whiteSpace: string | null;
+    widows: string | null;
+    width: string | null;
+    wordBreak: string | null;
+    wordSpacing: string | null;
+    wordWrap: string | null;
+    writingMode: string | null;
+    zIndex: string | null;
+    zoom: string | null;
+    resize: string | null;
+    userSelect: string | null;
+    getPropertyPriority(propertyName: string): string;
+    getPropertyValue(propertyName: string): string;
+    item(index: number): string;
+    removeProperty(propertyName: string): string;
+    setProperty(propertyName: string, value: string | null, priority?: string): void;
+    [index: number]: string;
+}
+
+declare var CSSStyleDeclaration: {
+    prototype: CSSStyleDeclaration;
+    new(): CSSStyleDeclaration;
+};
+
+interface CSSStyleRule extends CSSRule {
+    readonly readOnly: boolean;
+    selectorText: string;
+    readonly style: CSSStyleDeclaration;
+}
+
+declare var CSSStyleRule: {
+    prototype: CSSStyleRule;
+    new(): CSSStyleRule;
+};
+
+interface CSSStyleSheet extends StyleSheet {
+    readonly cssRules: CSSRuleList;
+    cssText: string;
+    readonly id: string;
+    readonly imports: StyleSheetList;
+    readonly isAlternate: boolean;
+    readonly isPrefAlternate: boolean;
+    readonly ownerRule: CSSRule;
+    readonly owningElement: Element;
+    readonly pages: StyleSheetPageList;
+    readonly readOnly: boolean;
+    readonly rules: CSSRuleList;
+    addImport(bstrURL: string, lIndex?: number): number;
+    addPageRule(bstrSelector: string, bstrStyle: string, lIndex?: number): number;
+    addRule(bstrSelector: string, bstrStyle?: string, lIndex?: number): number;
+    deleteRule(index?: number): void;
+    insertRule(rule: string, index?: number): number;
+    removeImport(lIndex: number): void;
+    removeRule(lIndex: number): void;
+}
+
+declare var CSSStyleSheet: {
+    prototype: CSSStyleSheet;
+    new(): CSSStyleSheet;
+};
+
+interface CSSSupportsRule extends CSSConditionRule {
+}
+
+declare var CSSSupportsRule: {
+    prototype: CSSSupportsRule;
+    new(): CSSSupportsRule;
+};
+
+interface CustomEvent extends Event {
+    readonly detail: any;
+    initCustomEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, detailArg: any): void;
+}
+
+declare var CustomEvent: {
+    prototype: CustomEvent;
+    new(typeArg: string, eventInitDict?: CustomEventInit): CustomEvent;
+};
+
+interface DataCue extends TextTrackCue {
+    data: ArrayBuffer;
+    addEventListener<K extends keyof TextTrackCueEventMap>(type: K, listener: (this: DataCue, ev: TextTrackCueEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var DataCue: {
+    prototype: DataCue;
+    new(): DataCue;
+};
+
+interface DataTransfer {
+    dropEffect: string;
+    effectAllowed: string;
+    readonly files: FileList;
+    readonly items: DataTransferItemList;
+    readonly types: string[];
+    clearData(format?: string): boolean;
+    getData(format: string): string;
+    setData(format: string, data: string): boolean;
+    setDragImage(image: Element, x: number, y: number): void;
+}
+
+declare var DataTransfer: {
+    prototype: DataTransfer;
+    new(): DataTransfer;
+};
+
+interface DataTransferItem {
+    readonly kind: string;
+    readonly type: string;
+    getAsFile(): File | null;
+    getAsString(_callback: FunctionStringCallback | null): void;
+    webkitGetAsEntry(): any;
+}
+
+declare var DataTransferItem: {
+    prototype: DataTransferItem;
+    new(): DataTransferItem;
+};
+
+interface DataTransferItemList {
+    readonly length: number;
+    add(data: File): DataTransferItem | null;
+    clear(): void;
+    item(index: number): DataTransferItem;
+    remove(index: number): void;
+    [index: number]: DataTransferItem;
+}
+
+declare var DataTransferItemList: {
+    prototype: DataTransferItemList;
+    new(): DataTransferItemList;
+};
+
+interface DeferredPermissionRequest {
+    readonly id: number;
+    readonly type: MSWebViewPermissionType;
+    readonly uri: string;
+    allow(): void;
+    deny(): void;
+}
+
+declare var DeferredPermissionRequest: {
+    prototype: DeferredPermissionRequest;
+    new(): DeferredPermissionRequest;
+};
+
+interface DelayNode extends AudioNode {
+    readonly delayTime: AudioParam;
+}
+
+declare var DelayNode: {
+    prototype: DelayNode;
+    new(): DelayNode;
+};
+
+interface DeviceAcceleration {
+    readonly x: number | null;
+    readonly y: number | null;
+    readonly z: number | null;
+}
+
+declare var DeviceAcceleration: {
+    prototype: DeviceAcceleration;
+    new(): DeviceAcceleration;
+};
+
+interface DeviceLightEvent extends Event {
+    readonly value: number;
+}
+
+declare var DeviceLightEvent: {
+    prototype: DeviceLightEvent;
+    new(typeArg: string, eventInitDict?: DeviceLightEventInit): DeviceLightEvent;
+};
+
+interface DeviceMotionEvent extends Event {
+    readonly acceleration: DeviceAcceleration | null;
+    readonly accelerationIncludingGravity: DeviceAcceleration | null;
+    readonly interval: number | null;
+    readonly rotationRate: DeviceRotationRate | null;
+    initDeviceMotionEvent(type: string, bubbles: boolean, cancelable: boolean, acceleration: DeviceAccelerationDict | null, accelerationIncludingGravity: DeviceAccelerationDict | null, rotationRate: DeviceRotationRateDict | null, interval: number | null): void;
+}
+
+declare var DeviceMotionEvent: {
+    prototype: DeviceMotionEvent;
+    new(typeArg: string, eventInitDict?: DeviceMotionEventInit): DeviceMotionEvent;
+};
+
+interface DeviceOrientationEvent extends Event {
+    readonly absolute: boolean;
+    readonly alpha: number | null;
+    readonly beta: number | null;
+    readonly gamma: number | null;
+    initDeviceOrientationEvent(type: string, bubbles: boolean, cancelable: boolean, alpha: number | null, beta: number | null, gamma: number | null, absolute: boolean): void;
+}
+
+declare var DeviceOrientationEvent: {
+    prototype: DeviceOrientationEvent;
+    new(typeArg: string, eventInitDict?: DeviceOrientationEventInit): DeviceOrientationEvent;
+};
+
+interface DeviceRotationRate {
+    readonly alpha: number | null;
+    readonly beta: number | null;
+    readonly gamma: number | null;
+}
+
+declare var DeviceRotationRate: {
+    prototype: DeviceRotationRate;
+    new(): DeviceRotationRate;
+};
+
+interface DocumentEventMap extends GlobalEventHandlersEventMap {
+    "abort": UIEvent;
+    "activate": UIEvent;
+    "beforeactivate": UIEvent;
+    "beforedeactivate": UIEvent;
+    "blur": FocusEvent;
+    "canplay": Event;
+    "canplaythrough": Event;
+    "change": Event;
+    "click": MouseEvent;
+    "contextmenu": PointerEvent;
+    "dblclick": MouseEvent;
+    "deactivate": UIEvent;
+    "drag": DragEvent;
+    "dragend": DragEvent;
+    "dragenter": DragEvent;
+    "dragleave": DragEvent;
+    "dragover": DragEvent;
+    "dragstart": DragEvent;
+    "drop": DragEvent;
+    "durationchange": Event;
+    "emptied": Event;
+    "ended": MediaStreamErrorEvent;
+    "error": ErrorEvent;
+    "focus": FocusEvent;
+    "fullscreenchange": Event;
+    "fullscreenerror": Event;
+    "input": Event;
+    "invalid": Event;
+    "keydown": KeyboardEvent;
+    "keypress": KeyboardEvent;
+    "keyup": KeyboardEvent;
+    "load": Event;
+    "loadeddata": Event;
+    "loadedmetadata": Event;
+    "loadstart": Event;
+    "mousedown": MouseEvent;
+    "mousemove": MouseEvent;
+    "mouseout": MouseEvent;
+    "mouseover": MouseEvent;
+    "mouseup": MouseEvent;
+    "mousewheel": WheelEvent;
+    "MSContentZoom": UIEvent;
+    "MSGestureChange": MSGestureEvent;
+    "MSGestureDoubleTap": MSGestureEvent;
+    "MSGestureEnd": MSGestureEvent;
+    "MSGestureHold": MSGestureEvent;
+    "MSGestureStart": MSGestureEvent;
+    "MSGestureTap": MSGestureEvent;
+    "MSInertiaStart": MSGestureEvent;
+    "MSManipulationStateChanged": MSManipulationEvent;
+    "MSPointerCancel": MSPointerEvent;
+    "MSPointerDown": MSPointerEvent;
+    "MSPointerEnter": MSPointerEvent;
+    "MSPointerLeave": MSPointerEvent;
+    "MSPointerMove": MSPointerEvent;
+    "MSPointerOut": MSPointerEvent;
+    "MSPointerOver": MSPointerEvent;
+    "MSPointerUp": MSPointerEvent;
+    "mssitemodejumplistitemremoved": MSSiteModeEvent;
+    "msthumbnailclick": MSSiteModeEvent;
+    "pause": Event;
+    "play": Event;
+    "playing": Event;
+    "pointerlockchange": Event;
+    "pointerlockerror": Event;
+    "progress": ProgressEvent;
+    "ratechange": Event;
+    "readystatechange": Event;
+    "reset": Event;
+    "scroll": UIEvent;
+    "seeked": Event;
+    "seeking": Event;
+    "select": UIEvent;
+    "selectionchange": Event;
+    "selectstart": Event;
+    "stalled": Event;
+    "stop": Event;
+    "submit": Event;
+    "suspend": Event;
+    "timeupdate": Event;
+    "touchcancel": TouchEvent;
+    "touchend": TouchEvent;
+    "touchmove": TouchEvent;
+    "touchstart": TouchEvent;
+    "volumechange": Event;
+    "waiting": Event;
+    "webkitfullscreenchange": Event;
+    "webkitfullscreenerror": Event;
+}
+
+interface Document extends Node, GlobalEventHandlers, NodeSelector, DocumentEvent, ParentNode, DocumentOrShadowRoot {
+    /**
+     * Gets the object that has the focus when the parent document has focus.
+     */
+    readonly activeElement: Element;
+    /**
+     * Sets or gets the color of all active links in the document.
+     */
+    alinkColor: string;
+    /**
+     * Returns a reference to the collection of elements contained by the object.
+     */
+    readonly all: HTMLAllCollection;
+    /**
+     * Retrieves a collection of all a objects that have a name and/or id property. Objects in this collection are in HTML source order.
+     */
+    anchors: HTMLCollectionOf<HTMLAnchorElement>;
+    /**
+     * Retrieves a collection of all applet objects in the document.
+     */
+    applets: HTMLCollectionOf<HTMLAppletElement>;
+    /**
+     * Deprecated. Sets or retrieves a value that indicates the background color behind the object.
+     */
+    bgColor: string;
+    /**
+     * Specifies the beginning and end of the document body.
+     */
+    body: HTMLElement;
+    readonly characterSet: string;
+    /**
+     * Gets or sets the character set used to encode the object.
+     */
+    charset: string;
+    /**
+     * Gets a value that indicates whether standards-compliant mode is switched on for the object.
+     */
+    readonly compatMode: string;
+    cookie: string;
+    readonly currentScript: HTMLScriptElement | SVGScriptElement;
+    readonly defaultView: Window;
+    /**
+     * Sets or gets a value that indicates whether the document can be edited.
+     */
+    designMode: string;
+    /**
+     * Sets or retrieves a value that indicates the reading order of the object.
+     */
+    dir: string;
+    /**
+     * Gets an object representing the document type declaration associated with the current document.
+     */
+    readonly doctype: DocumentType;
+    /**
+     * Gets a reference to the root node of the document.
+     */
+    documentElement: HTMLElement;
+    /**
+     * Sets or gets the security domain of the document.
+     */
+    domain: string;
+    /**
+     * Retrieves a collection of all embed objects in the document.
+     */
+    embeds: HTMLCollectionOf<HTMLEmbedElement>;
+    /**
+     * Sets or gets the foreground (text) color of the document.
+     */
+    fgColor: string;
+    /**
+     * Retrieves a collection, in source order, of all form objects in the document.
+     */
+    forms: HTMLCollectionOf<HTMLFormElement>;
+    readonly fullscreenElement: Element | null;
+    readonly fullscreenEnabled: boolean;
+    readonly head: HTMLHeadElement;
+    readonly hidden: boolean;
+    /**
+     * Retrieves a collection, in source order, of img objects in the document.
+     */
+    images: HTMLCollectionOf<HTMLImageElement>;
+    /**
+     * Gets the implementation object of the current document.
+     */
+    readonly implementation: DOMImplementation;
+    /**
+     * Returns the character encoding used to create the webpage that is loaded into the document object.
+     */
+    readonly inputEncoding: string | null;
+    /**
+     * Gets the date that the page was last modified, if the page supplies one.
+     */
+    readonly lastModified: string;
+    /**
+     * Sets or gets the color of the document links.
+     */
+    linkColor: string;
+    /**
+     * Retrieves a collection of all a objects that specify the href property and all area objects in the document.
+     */
+    links: HTMLCollectionOf<HTMLAnchorElement | HTMLAreaElement>;
+    /**
+     * Contains information about the current URL.
+     */
+    readonly location: Location;
+    msCapsLockWarningOff: boolean;
+    msCSSOMElementFloatMetrics: boolean;
+    /**
+     * Fires when the user aborts the download.
+     * @param ev The event.
+     */
+    onabort: (this: Document, ev: UIEvent) => any;
+    /**
+     * Fires when the object is set as the active element.
+     * @param ev The event.
+     */
+    onactivate: (this: Document, ev: UIEvent) => any;
+    /**
+     * Fires immediately before the object is set as the active element.
+     * @param ev The event.
+     */
+    onbeforeactivate: (this: Document, ev: UIEvent) => any;
+    /**
+     * Fires immediately before the activeElement is changed from the current object to another object in the parent document.
+     * @param ev The event.
+     */
+    onbeforedeactivate: (this: Document, ev: UIEvent) => any;
+    /**
+     * Fires when the object loses the input focus.
+     * @param ev The focus event.
+     */
+    onblur: (this: Document, ev: FocusEvent) => any;
+    /**
+     * Occurs when playback is possible, but would require further buffering.
+     * @param ev The event.
+     */
+    oncanplay: (this: Document, ev: Event) => any;
+    oncanplaythrough: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the contents of the object or selection have changed.
+     * @param ev The event.
+     */
+    onchange: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the user clicks the left mouse button on the object
+     * @param ev The mouse event.
+     */
+    onclick: (this: Document, ev: MouseEvent) => any;
+    /**
+     * Fires when the user clicks the right mouse button in the client area, opening the context menu.
+     * @param ev The mouse event.
+     */
+    oncontextmenu: (this: Document, ev: PointerEvent) => any;
+    /**
+     * Fires when the user double-clicks the object.
+     * @param ev The mouse event.
+     */
+    ondblclick: (this: Document, ev: MouseEvent) => any;
+    /**
+     * Fires when the activeElement is changed from the current object to another object in the parent document.
+     * @param ev The UI Event
+     */
+    ondeactivate: (this: Document, ev: UIEvent) => any;
+    /**
+     * Fires on the source object continuously during a drag operation.
+     * @param ev The event.
+     */
+    ondrag: (this: Document, ev: DragEvent) => any;
+    /**
+     * Fires on the source object when the user releases the mouse at the close of a drag operation.
+     * @param ev The event.
+     */
+    ondragend: (this: Document, ev: DragEvent) => any;
+    /**
+     * Fires on the target element when the user drags the object to a valid drop target.
+     * @param ev The drag event.
+     */
+    ondragenter: (this: Document, ev: DragEvent) => any;
+    /**
+     * Fires on the target object when the user moves the mouse out of a valid drop target during a drag operation.
+     * @param ev The drag event.
+     */
+    ondragleave: (this: Document, ev: DragEvent) => any;
+    /**
+     * Fires on the target element continuously while the user drags the object over a valid drop target.
+     * @param ev The event.
+     */
+    ondragover: (this: Document, ev: DragEvent) => any;
+    /**
+     * Fires on the source object when the user starts to drag a text selection or selected object.
+     * @param ev The event.
+     */
+    ondragstart: (this: Document, ev: DragEvent) => any;
+    ondrop: (this: Document, ev: DragEvent) => any;
+    /**
+     * Occurs when the duration attribute is updated.
+     * @param ev The event.
+     */
+    ondurationchange: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when the media element is reset to its initial state.
+     * @param ev The event.
+     */
+    onemptied: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when the end of playback is reached.
+     * @param ev The event
+     */
+    onended: (this: Document, ev: MediaStreamErrorEvent) => any;
+    /**
+     * Fires when an error occurs during object loading.
+     * @param ev The event.
+     */
+    onerror: (this: Document, ev: ErrorEvent) => any;
+    /**
+     * Fires when the object receives focus.
+     * @param ev The event.
+     */
+    onfocus: (this: Document, ev: FocusEvent) => any;
+    onfullscreenchange: (this: Document, ev: Event) => any;
+    onfullscreenerror: (this: Document, ev: Event) => any;
+    oninput: (this: Document, ev: Event) => any;
+    oninvalid: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the user presses a key.
+     * @param ev The keyboard event
+     */
+    onkeydown: (this: Document, ev: KeyboardEvent) => any;
+    /**
+     * Fires when the user presses an alphanumeric key.
+     * @param ev The event.
+     */
+    onkeypress: (this: Document, ev: KeyboardEvent) => any;
+    /**
+     * Fires when the user releases a key.
+     * @param ev The keyboard event
+     */
+    onkeyup: (this: Document, ev: KeyboardEvent) => any;
+    /**
+     * Fires immediately after the browser loads the object.
+     * @param ev The event.
+     */
+    onload: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when media data is loaded at the current playback position.
+     * @param ev The event.
+     */
+    onloadeddata: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when the duration and dimensions of the media have been determined.
+     * @param ev The event.
+     */
+    onloadedmetadata: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when Internet Explorer begins looking for media data.
+     * @param ev The event.
+     */
+    onloadstart: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the user clicks the object with either mouse button.
+     * @param ev The mouse event.
+     */
+    onmousedown: (this: Document, ev: MouseEvent) => any;
+    /**
+     * Fires when the user moves the mouse over the object.
+     * @param ev The mouse event.
+     */
+    onmousemove: (this: Document, ev: MouseEvent) => any;
+    /**
+     * Fires when the user moves the mouse pointer outside the boundaries of the object.
+     * @param ev The mouse event.
+     */
+    onmouseout: (this: Document, ev: MouseEvent) => any;
+    /**
+     * Fires when the user moves the mouse pointer into the object.
+     * @param ev The mouse event.
+     */
+    onmouseover: (this: Document, ev: MouseEvent) => any;
+    /**
+     * Fires when the user releases a mouse button while the mouse is over the object.
+     * @param ev The mouse event.
+     */
+    onmouseup: (this: Document, ev: MouseEvent) => any;
+    /**
+     * Fires when the wheel button is rotated.
+     * @param ev The mouse event
+     */
+    onmousewheel: (this: Document, ev: WheelEvent) => any;
+    onmscontentzoom: (this: Document, ev: UIEvent) => any;
+    onmsgesturechange: (this: Document, ev: MSGestureEvent) => any;
+    onmsgesturedoubletap: (this: Document, ev: MSGestureEvent) => any;
+    onmsgestureend: (this: Document, ev: MSGestureEvent) => any;
+    onmsgesturehold: (this: Document, ev: MSGestureEvent) => any;
+    onmsgesturestart: (this: Document, ev: MSGestureEvent) => any;
+    onmsgesturetap: (this: Document, ev: MSGestureEvent) => any;
+    onmsinertiastart: (this: Document, ev: MSGestureEvent) => any;
+    onmsmanipulationstatechanged: (this: Document, ev: MSManipulationEvent) => any;
+    onmspointercancel: (this: Document, ev: MSPointerEvent) => any;
+    onmspointerdown: (this: Document, ev: MSPointerEvent) => any;
+    onmspointerenter: (this: Document, ev: MSPointerEvent) => any;
+    onmspointerleave: (this: Document, ev: MSPointerEvent) => any;
+    onmspointermove: (this: Document, ev: MSPointerEvent) => any;
+    onmspointerout: (this: Document, ev: MSPointerEvent) => any;
+    onmspointerover: (this: Document, ev: MSPointerEvent) => any;
+    onmspointerup: (this: Document, ev: MSPointerEvent) => any;
+    /**
+     * Occurs when an item is removed from a Jump List of a webpage running in Site Mode.
+     * @param ev The event.
+     */
+    onmssitemodejumplistitemremoved: (this: Document, ev: MSSiteModeEvent) => any;
+    /**
+     * Occurs when a user clicks a button in a Thumbnail Toolbar of a webpage running in Site Mode.
+     * @param ev The event.
+     */
+    onmsthumbnailclick: (this: Document, ev: MSSiteModeEvent) => any;
+    /**
+     * Occurs when playback is paused.
+     * @param ev The event.
+     */
+    onpause: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when the play method is requested.
+     * @param ev The event.
+     */
+    onplay: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when the audio or video has started playing.
+     * @param ev The event.
+     */
+    onplaying: (this: Document, ev: Event) => any;
+    onpointerlockchange: (this: Document, ev: Event) => any;
+    onpointerlockerror: (this: Document, ev: Event) => any;
+    /**
+     * Occurs to indicate progress while downloading media data.
+     * @param ev The event.
+     */
+    onprogress: (this: Document, ev: ProgressEvent) => any;
+    /**
+     * Occurs when the playback rate is increased or decreased.
+     * @param ev The event.
+     */
+    onratechange: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the state of the object has changed.
+     * @param ev The event
+     */
+    onreadystatechange: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the user resets a form.
+     * @param ev The event.
+     */
+    onreset: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the user repositions the scroll box in the scroll bar on the object.
+     * @param ev The event.
+     */
+    onscroll: (this: Document, ev: UIEvent) => any;
+    /**
+     * Occurs when the seek operation ends.
+     * @param ev The event.
+     */
+    onseeked: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when the current playback position is moved.
+     * @param ev The event.
+     */
+    onseeking: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the current selection changes.
+     * @param ev The event.
+     */
+    onselect: (this: Document, ev: UIEvent) => any;
+    /**
+     * Fires when the selection state of a document changes.
+     * @param ev The event.
+     */
+    onselectionchange: (this: Document, ev: Event) => any;
+    onselectstart: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when the download has stopped.
+     * @param ev The event.
+     */
+    onstalled: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the user clicks the Stop button or leaves the Web page.
+     * @param ev The event.
+     */
+    onstop: (this: Document, ev: Event) => any;
+    onsubmit: (this: Document, ev: Event) => any;
+    /**
+     * Occurs if the load operation has been intentionally halted.
+     * @param ev The event.
+     */
+    onsuspend: (this: Document, ev: Event) => any;
+    /**
+     * Occurs to indicate the current playback position.
+     * @param ev The event.
+     */
+    ontimeupdate: (this: Document, ev: Event) => any;
+    ontouchcancel: (ev: TouchEvent) => any;
+    ontouchend: (ev: TouchEvent) => any;
+    ontouchmove: (ev: TouchEvent) => any;
+    ontouchstart: (ev: TouchEvent) => any;
+    /**
+     * Occurs when the volume is changed, or playback is muted or unmuted.
+     * @param ev The event.
+     */
+    onvolumechange: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when playback stops because the next frame of a video resource is not available.
+     * @param ev The event.
+     */
+    onwaiting: (this: Document, ev: Event) => any;
+    onwebkitfullscreenchange: (this: Document, ev: Event) => any;
+    onwebkitfullscreenerror: (this: Document, ev: Event) => any;
+    plugins: HTMLCollectionOf<HTMLEmbedElement>;
+    readonly pointerLockElement: Element;
+    /**
+     * Retrieves a value that indicates the current state of the object.
+     */
+    readonly readyState: string;
+    /**
+     * Gets the URL of the location that referred the user to the current page.
+     */
+    readonly referrer: string;
+    /**
+     * Gets the root svg element in the document hierarchy.
+     */
+    readonly rootElement: SVGSVGElement;
+    /**
+     * Retrieves a collection of all script objects in the document.
+     */
+    scripts: HTMLCollectionOf<HTMLScriptElement>;
+    readonly scrollingElement: Element | null;
+    /**
+     * Retrieves a collection of styleSheet objects representing the style sheets that correspond to each instance of a link or style object in the document.
+     */
+    readonly styleSheets: StyleSheetList;
+    /**
+     * Contains the title of the document.
+     */
+    title: string;
+    /**
+     * Sets or gets the URL for the current document.
+     */
+    readonly URL: string;
+    /**
+     * Gets the URL for the document, stripped of any character encoding.
+     */
+    readonly URLUnencoded: string;
+    readonly visibilityState: VisibilityState;
+    /**
+     * Sets or gets the color of the links that the user has visited.
+     */
+    vlinkColor: string;
+    readonly webkitCurrentFullScreenElement: Element | null;
+    readonly webkitFullscreenElement: Element | null;
+    readonly webkitFullscreenEnabled: boolean;
+    readonly webkitIsFullScreen: boolean;
+    readonly xmlEncoding: string | null;
+    xmlStandalone: boolean;
+    /**
+     * Gets or sets the version attribute specified in the declaration of an XML document.
+     */
+    xmlVersion: string | null;
+    adoptNode<T extends Node>(source: T): T;
+    captureEvents(): void;
+    caretRangeFromPoint(x: number, y: number): Range;
+    clear(): void;
+    /**
+     * Closes an output stream and forces the sent data to display.
+     */
+    close(): void;
+    /**
+     * Creates an attribute object with a specified name.
+     * @param name String that sets the attribute object's name.
+     */
+    createAttribute(name: string): Attr;
+    createAttributeNS(namespaceURI: string | null, qualifiedName: string): Attr;
+    createCDATASection(data: string): CDATASection;
+    /**
+     * Creates a comment object with the specified data.
+     * @param data Sets the comment object's data.
+     */
+    createComment(data: string): Comment;
+    /**
+     * Creates a new document.
+     */
+    createDocumentFragment(): DocumentFragment;
+    /**
+     * Creates an instance of the element for the specified tag.
+     * @param tagName The name of an element.
+     */
+    createElement<K extends keyof HTMLElementTagNameMap>(tagName: K): HTMLElementTagNameMap[K];
+    createElement(tagName: string): HTMLElement;
+    createElementNS(namespaceURI: "http://www.w3.org/1999/xhtml", qualifiedName: string): HTMLElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "a"): SVGAElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "circle"): SVGCircleElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "clipPath"): SVGClipPathElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "componentTransferFunction"): SVGComponentTransferFunctionElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "defs"): SVGDefsElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "desc"): SVGDescElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "ellipse"): SVGEllipseElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feBlend"): SVGFEBlendElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feColorMatrix"): SVGFEColorMatrixElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feComponentTransfer"): SVGFEComponentTransferElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feComposite"): SVGFECompositeElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feConvolveMatrix"): SVGFEConvolveMatrixElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feDiffuseLighting"): SVGFEDiffuseLightingElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feDisplacementMap"): SVGFEDisplacementMapElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feDistantLight"): SVGFEDistantLightElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feFlood"): SVGFEFloodElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feFuncA"): SVGFEFuncAElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feFuncB"): SVGFEFuncBElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feFuncG"): SVGFEFuncGElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feFuncR"): SVGFEFuncRElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feGaussianBlur"): SVGFEGaussianBlurElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feImage"): SVGFEImageElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feMerge"): SVGFEMergeElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feMergeNode"): SVGFEMergeNodeElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feMorphology"): SVGFEMorphologyElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feOffset"): SVGFEOffsetElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "fePointLight"): SVGFEPointLightElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feSpecularLighting"): SVGFESpecularLightingElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feSpotLight"): SVGFESpotLightElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feTile"): SVGFETileElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feTurbulence"): SVGFETurbulenceElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "filter"): SVGFilterElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "foreignObject"): SVGForeignObjectElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "g"): SVGGElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "image"): SVGImageElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "gradient"): SVGGradientElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "line"): SVGLineElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "linearGradient"): SVGLinearGradientElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "marker"): SVGMarkerElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "mask"): SVGMaskElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "path"): SVGPathElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "metadata"): SVGMetadataElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "pattern"): SVGPatternElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "polygon"): SVGPolygonElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "polyline"): SVGPolylineElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "radialGradient"): SVGRadialGradientElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "rect"): SVGRectElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "svg"): SVGSVGElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "script"): SVGScriptElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "stop"): SVGStopElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "style"): SVGStyleElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "switch"): SVGSwitchElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "symbol"): SVGSymbolElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "tspan"): SVGTSpanElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "textContent"): SVGTextContentElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "text"): SVGTextElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "textPath"): SVGTextPathElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "textPositioning"): SVGTextPositioningElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "title"): SVGTitleElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "use"): SVGUseElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "view"): SVGViewElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: string): SVGElement;
+    createElementNS(namespaceURI: string | null, qualifiedName: string): Element;
+    createExpression(expression: string, resolver: XPathNSResolver): XPathExpression;
+    /**
+     * Creates a NodeIterator object that you can use to traverse filtered lists of nodes or elements in a document.
+     * @param root The root element or node to start traversing on.
+     * @param whatToShow The type of nodes or elements to appear in the node list
+     * @param filter A custom NodeFilter function to use. For more information, see filter. Use null for no filter.
+     * @param entityReferenceExpansion A flag that specifies whether entity reference nodes are expanded.
+     */
+    createNodeIterator(root: Node, whatToShow?: number, filter?: NodeFilter, entityReferenceExpansion?: boolean): NodeIterator;
+    createNSResolver(nodeResolver: Node): XPathNSResolver;
+    createProcessingInstruction(target: string, data: string): ProcessingInstruction;
+    /**
+     *  Returns an empty range object that has both of its boundary points positioned at the beginning of the document.
+     */
+    createRange(): Range;
+    /**
+     * Creates a text string from the specified value.
+     * @param data String that specifies the nodeValue property of the text node.
+     */
+    createTextNode(data: string): Text;
+    createTouch(view: Window, target: EventTarget, identifier: number, pageX: number, pageY: number, screenX: number, screenY: number): Touch;
+    createTouchList(...touches: Touch[]): TouchList;
+    /**
+     * Creates a TreeWalker object that you can use to traverse filtered lists of nodes or elements in a document.
+     * @param root The root element or node to start traversing on.
+     * @param whatToShow The type of nodes or elements to appear in the node list. For more information, see whatToShow.
+     * @param filter A custom NodeFilter function to use.
+     * @param entityReferenceExpansion A flag that specifies whether entity reference nodes are expanded.
+     */
+    createTreeWalker(root: Node, whatToShow?: number, filter?: NodeFilter, entityReferenceExpansion?: boolean): TreeWalker;
+    /**
+     * Returns the element for the specified x coordinate and the specified y coordinate.
+     * @param x The x-offset
+     * @param y The y-offset
+     */
+    elementFromPoint(x: number, y: number): Element;
+    evaluate(expression: string, contextNode: Node, resolver: XPathNSResolver | null, type: number, result: XPathResult | null): XPathResult;
+    /**
+     * Executes a command on the current document, current selection, or the given range.
+     * @param commandId String that specifies the command to execute. This command can be any of the command identifiers that can be executed in script.
+     * @param showUI Display the user interface, defaults to false.
+     * @param value Value to assign.
+     */
+    execCommand(commandId: string, showUI?: boolean, value?: any): boolean;
+    /**
+     * Displays help information for the given command identifier.
+     * @param commandId Displays help information for the given command identifier.
+     */
+    execCommandShowHelp(commandId: string): boolean;
+    exitFullscreen(): void;
+    exitPointerLock(): void;
+    /**
+     * Causes the element to receive the focus and executes the code specified by the onfocus event.
+     */
+    focus(): void;
+    /**
+     * Returns a reference to the first object with the specified value of the ID or NAME attribute.
+     * @param elementId String that specifies the ID value. Case-insensitive.
+     */
+    getElementById(elementId: string): HTMLElement | null;
+    getElementsByClassName(classNames: string): HTMLCollectionOf<Element>;
+    /**
+     * Gets a collection of objects based on the value of the NAME or ID attribute.
+     * @param elementName Gets a collection of objects based on the value of the NAME or ID attribute.
+     */
+    getElementsByName(elementName: string): NodeListOf<HTMLElement>;
+    /**
+     * Retrieves a collection of objects based on the specified element name.
+     * @param name Specifies the name of an element.
+     */
+    getElementsByTagName<K extends keyof ElementListTagNameMap>(tagname: K): ElementListTagNameMap[K];
+    getElementsByTagName(tagname: string): NodeListOf<Element>;
+    getElementsByTagNameNS(namespaceURI: "http://www.w3.org/1999/xhtml", localName: string): HTMLCollectionOf<HTMLElement>;
+    getElementsByTagNameNS(namespaceURI: "http://www.w3.org/2000/svg", localName: string): HTMLCollectionOf<SVGElement>;
+    getElementsByTagNameNS(namespaceURI: string, localName: string): HTMLCollectionOf<Element>;
+    /**
+     * Returns an object representing the current selection of the document that is loaded into the object displaying a webpage.
+     */
+    getSelection(): Selection;
+    /**
+     * Gets a value indicating whether the object currently has focus.
+     */
+    hasFocus(): boolean;
+    importNode<T extends Node>(importedNode: T, deep: boolean): T;
+    msElementsFromPoint(x: number, y: number): NodeListOf<Element>;
+    msElementsFromRect(left: number, top: number, width: number, height: number): NodeListOf<Element>;
+    /**
+     * Opens a new window and loads a document specified by a given URL. Also, opens a new window that uses the url parameter and the name parameter to collect the output of the write method and the writeln method.
+     * @param url Specifies a MIME type for the document.
+     * @param name Specifies the name of the window. This name is used as the value for the TARGET attribute on a form or an anchor element.
+     * @param features Contains a list of items separated by commas. Each item consists of an option and a value, separated by an equals sign (for example, "fullscreen=yes, toolbar=yes"). The following values are supported.
+     * @param replace Specifies whether the existing entry for the document is replaced in the history list.
+     */
+    open(url?: string, name?: string, features?: string, replace?: boolean): Document;
+    /**
+     * Returns a Boolean value that indicates whether a specified command can be successfully executed using execCommand, given the current state of the document.
+     * @param commandId Specifies a command identifier.
+     */
+    queryCommandEnabled(commandId: string): boolean;
+    /**
+     * Returns a Boolean value that indicates whether the specified command is in the indeterminate state.
+     * @param commandId String that specifies a command identifier.
+     */
+    queryCommandIndeterm(commandId: string): boolean;
+    /**
+     * Returns a Boolean value that indicates the current state of the command.
+     * @param commandId String that specifies a command identifier.
+     */
+    queryCommandState(commandId: string): boolean;
+    /**
+     * Returns a Boolean value that indicates whether the current command is supported on the current range.
+     * @param commandId Specifies a command identifier.
+     */
+    queryCommandSupported(commandId: string): boolean;
+    /**
+     * Retrieves the string associated with a command.
+     * @param commandId String that contains the identifier of a command. This can be any command identifier given in the list of Command Identifiers.
+     */
+    queryCommandText(commandId: string): string;
+    /**
+     * Returns the current value of the document, range, or current selection for the given command.
+     * @param commandId String that specifies a command identifier.
+     */
+    queryCommandValue(commandId: string): string;
+    releaseEvents(): void;
+    /**
+     * Allows updating the print settings for the page.
+     */
+    updateSettings(): void;
+    webkitCancelFullScreen(): void;
+    webkitExitFullscreen(): void;
+    /**
+     * Writes one or more HTML expressions to a document in the specified window.
+     * @param content Specifies the text and HTML tags to write.
+     */
+    write(...content: string[]): void;
+    /**
+     * Writes one or more HTML expressions, followed by a carriage return, to a document in the specified window.
+     * @param content The text and HTML tags to write.
+     */
+    writeln(...content: string[]): void;
+    addEventListener<K extends keyof DocumentEventMap>(type: K, listener: (this: Document, ev: DocumentEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var Document: {
+    prototype: Document;
+    new(): Document;
+};
+
+interface DocumentFragment extends Node, NodeSelector, ParentNode {
+    getElementById(elementId: string): HTMLElement | null;
+}
+
+declare var DocumentFragment: {
+    prototype: DocumentFragment;
+    new(): DocumentFragment;
+};
+
+interface DocumentType extends Node, ChildNode {
+    readonly entities: NamedNodeMap;
+    readonly internalSubset: string | null;
+    readonly name: string;
+    readonly notations: NamedNodeMap;
+    readonly publicId: string;
+    readonly systemId: string;
+}
+
+declare var DocumentType: {
+    prototype: DocumentType;
+    new(): DocumentType;
+};
+
+interface DOMError {
+    readonly name: string;
+    toString(): string;
+}
+
+declare var DOMError: {
+    prototype: DOMError;
+    new(): DOMError;
+};
+
+interface DOMException {
+    readonly code: number;
+    readonly message: string;
+    readonly name: string;
+    toString(): string;
+    readonly ABORT_ERR: number;
+    readonly DATA_CLONE_ERR: number;
+    readonly DOMSTRING_SIZE_ERR: number;
+    readonly HIERARCHY_REQUEST_ERR: number;
+    readonly INDEX_SIZE_ERR: number;
+    readonly INUSE_ATTRIBUTE_ERR: number;
+    readonly INVALID_ACCESS_ERR: number;
+    readonly INVALID_CHARACTER_ERR: number;
+    readonly INVALID_MODIFICATION_ERR: number;
+    readonly INVALID_NODE_TYPE_ERR: number;
+    readonly INVALID_STATE_ERR: number;
+    readonly NAMESPACE_ERR: number;
+    readonly NETWORK_ERR: number;
+    readonly NO_DATA_ALLOWED_ERR: number;
+    readonly NO_MODIFICATION_ALLOWED_ERR: number;
+    readonly NOT_FOUND_ERR: number;
+    readonly NOT_SUPPORTED_ERR: number;
+    readonly PARSE_ERR: number;
+    readonly QUOTA_EXCEEDED_ERR: number;
+    readonly SECURITY_ERR: number;
+    readonly SERIALIZE_ERR: number;
+    readonly SYNTAX_ERR: number;
+    readonly TIMEOUT_ERR: number;
+    readonly TYPE_MISMATCH_ERR: number;
+    readonly URL_MISMATCH_ERR: number;
+    readonly VALIDATION_ERR: number;
+    readonly WRONG_DOCUMENT_ERR: number;
+}
+
+declare var DOMException: {
+    prototype: DOMException;
+    new(): DOMException;
+    readonly ABORT_ERR: number;
+    readonly DATA_CLONE_ERR: number;
+    readonly DOMSTRING_SIZE_ERR: number;
+    readonly HIERARCHY_REQUEST_ERR: number;
+    readonly INDEX_SIZE_ERR: number;
+    readonly INUSE_ATTRIBUTE_ERR: number;
+    readonly INVALID_ACCESS_ERR: number;
+    readonly INVALID_CHARACTER_ERR: number;
+    readonly INVALID_MODIFICATION_ERR: number;
+    readonly INVALID_NODE_TYPE_ERR: number;
+    readonly INVALID_STATE_ERR: number;
+    readonly NAMESPACE_ERR: number;
+    readonly NETWORK_ERR: number;
+    readonly NO_DATA_ALLOWED_ERR: number;
+    readonly NO_MODIFICATION_ALLOWED_ERR: number;
+    readonly NOT_FOUND_ERR: number;
+    readonly NOT_SUPPORTED_ERR: number;
+    readonly PARSE_ERR: number;
+    readonly QUOTA_EXCEEDED_ERR: number;
+    readonly SECURITY_ERR: number;
+    readonly SERIALIZE_ERR: number;
+    readonly SYNTAX_ERR: number;
+    readonly TIMEOUT_ERR: number;
+    readonly TYPE_MISMATCH_ERR: number;
+    readonly URL_MISMATCH_ERR: number;
+    readonly VALIDATION_ERR: number;
+    readonly WRONG_DOCUMENT_ERR: number;
+};
+
+interface DOMImplementation {
+    createDocument(namespaceURI: string | null, qualifiedName: string | null, doctype: DocumentType | null): Document;
+    createDocumentType(qualifiedName: string, publicId: string, systemId: string): DocumentType;
+    createHTMLDocument(title: string): Document;
+    hasFeature(feature: string | null, version: string | null): boolean;
+}
+
+declare var DOMImplementation: {
+    prototype: DOMImplementation;
+    new(): DOMImplementation;
+};
+
+interface DOMParser {
+    parseFromString(source: string, mimeType: string): Document;
+}
+
+declare var DOMParser: {
+    prototype: DOMParser;
+    new(): DOMParser;
+};
+
+interface DOMSettableTokenList extends DOMTokenList {
+    value: string;
+}
+
+declare var DOMSettableTokenList: {
+    prototype: DOMSettableTokenList;
+    new(): DOMSettableTokenList;
+};
+
+interface DOMStringList {
+    readonly length: number;
+    contains(str: string): boolean;
+    item(index: number): string | null;
+    [index: number]: string;
+}
+
+declare var DOMStringList: {
+    prototype: DOMStringList;
+    new(): DOMStringList;
+};
+
+interface DOMStringMap {
+    [name: string]: string | undefined;
+}
+
+declare var DOMStringMap: {
+    prototype: DOMStringMap;
+    new(): DOMStringMap;
+};
+
+interface DOMTokenList {
+    readonly length: number;
+    add(...token: string[]): void;
+    contains(token: string): boolean;
+    item(index: number): string;
+    remove(...token: string[]): void;
+    toggle(token: string, force?: boolean): boolean;
+    toString(): string;
+    [index: number]: string;
+}
+
+declare var DOMTokenList: {
+    prototype: DOMTokenList;
+    new(): DOMTokenList;
+};
+
+interface DragEvent extends MouseEvent {
+    readonly dataTransfer: DataTransfer;
+    initDragEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, ctrlKeyArg: boolean, altKeyArg: boolean, shiftKeyArg: boolean, metaKeyArg: boolean, buttonArg: number, relatedTargetArg: EventTarget, dataTransferArg: DataTransfer): void;
+    msConvertURL(file: File, targetType: string, targetURL?: string): void;
+}
+
+declare var DragEvent: {
+    prototype: DragEvent;
+    new(type: "drag" | "dragend" | "dragenter" | "dragexit" | "dragleave" | "dragover" | "dragstart" | "drop", dragEventInit?: { dataTransfer?: DataTransfer }): DragEvent;
+};
+
+interface DynamicsCompressorNode extends AudioNode {
+    readonly attack: AudioParam;
+    readonly knee: AudioParam;
+    readonly ratio: AudioParam;
+    readonly reduction: number;
+    readonly release: AudioParam;
+    readonly threshold: AudioParam;
+}
+
+declare var DynamicsCompressorNode: {
+    prototype: DynamicsCompressorNode;
+    new(): DynamicsCompressorNode;
+};
+
+interface ElementEventMap extends GlobalEventHandlersEventMap {
+    "ariarequest": Event;
+    "command": Event;
+    "gotpointercapture": PointerEvent;
+    "lostpointercapture": PointerEvent;
+    "MSGestureChange": MSGestureEvent;
+    "MSGestureDoubleTap": MSGestureEvent;
+    "MSGestureEnd": MSGestureEvent;
+    "MSGestureHold": MSGestureEvent;
+    "MSGestureStart": MSGestureEvent;
+    "MSGestureTap": MSGestureEvent;
+    "MSGotPointerCapture": MSPointerEvent;
+    "MSInertiaStart": MSGestureEvent;
+    "MSLostPointerCapture": MSPointerEvent;
+    "MSPointerCancel": MSPointerEvent;
+    "MSPointerDown": MSPointerEvent;
+    "MSPointerEnter": MSPointerEvent;
+    "MSPointerLeave": MSPointerEvent;
+    "MSPointerMove": MSPointerEvent;
+    "MSPointerOut": MSPointerEvent;
+    "MSPointerOver": MSPointerEvent;
+    "MSPointerUp": MSPointerEvent;
+    "touchcancel": TouchEvent;
+    "touchend": TouchEvent;
+    "touchmove": TouchEvent;
+    "touchstart": TouchEvent;
+    "webkitfullscreenchange": Event;
+    "webkitfullscreenerror": Event;
+}
+
+interface Element extends Node, GlobalEventHandlers, ElementTraversal, NodeSelector, ChildNode, ParentNode {
+    readonly classList: DOMTokenList;
+    className: string;
+    readonly clientHeight: number;
+    readonly clientLeft: number;
+    readonly clientTop: number;
+    readonly clientWidth: number;
+    id: string;
+    innerHTML: string;
+    msContentZoomFactor: number;
+    readonly msRegionOverflow: string;
+    onariarequest: (this: Element, ev: Event) => any;
+    oncommand: (this: Element, ev: Event) => any;
+    ongotpointercapture: (this: Element, ev: PointerEvent) => any;
+    onlostpointercapture: (this: Element, ev: PointerEvent) => any;
+    onmsgesturechange: (this: Element, ev: MSGestureEvent) => any;
+    onmsgesturedoubletap: (this: Element, ev: MSGestureEvent) => any;
+    onmsgestureend: (this: Element, ev: MSGestureEvent) => any;
+    onmsgesturehold: (this: Element, ev: MSGestureEvent) => any;
+    onmsgesturestart: (this: Element, ev: MSGestureEvent) => any;
+    onmsgesturetap: (this: Element, ev: MSGestureEvent) => any;
+    onmsgotpointercapture: (this: Element, ev: MSPointerEvent) => any;
+    onmsinertiastart: (this: Element, ev: MSGestureEvent) => any;
+    onmslostpointercapture: (this: Element, ev: MSPointerEvent) => any;
+    onmspointercancel: (this: Element, ev: MSPointerEvent) => any;
+    onmspointerdown: (this: Element, ev: MSPointerEvent) => any;
+    onmspointerenter: (this: Element, ev: MSPointerEvent) => any;
+    onmspointerleave: (this: Element, ev: MSPointerEvent) => any;
+    onmspointermove: (this: Element, ev: MSPointerEvent) => any;
+    onmspointerout: (this: Element, ev: MSPointerEvent) => any;
+    onmspointerover: (this: Element, ev: MSPointerEvent) => any;
+    onmspointerup: (this: Element, ev: MSPointerEvent) => any;
+    ontouchcancel: (ev: TouchEvent) => any;
+    ontouchend: (ev: TouchEvent) => any;
+    ontouchmove: (ev: TouchEvent) => any;
+    ontouchstart: (ev: TouchEvent) => any;
+    onwebkitfullscreenchange: (this: Element, ev: Event) => any;
+    onwebkitfullscreenerror: (this: Element, ev: Event) => any;
+    outerHTML: string;
+    readonly prefix: string | null;
+    readonly scrollHeight: number;
+    scrollLeft: number;
+    scrollTop: number;
+    readonly scrollWidth: number;
+    readonly tagName: string;
+    readonly assignedSlot: HTMLSlotElement | null;
+    slot: string;
+    readonly shadowRoot: ShadowRoot | null;
+    getAttribute(name: string): string | null;
+    getAttributeNode(name: string): Attr;
+    getAttributeNodeNS(namespaceURI: string, localName: string): Attr;
+    getAttributeNS(namespaceURI: string, localName: string): string;
+    getBoundingClientRect(): ClientRect;
+    getClientRects(): ClientRectList;
+    getElementsByTagName<K extends keyof ElementListTagNameMap>(name: K): ElementListTagNameMap[K];
+    getElementsByTagName(name: string): NodeListOf<Element>;
+    getElementsByTagNameNS(namespaceURI: "http://www.w3.org/1999/xhtml", localName: string): HTMLCollectionOf<HTMLElement>;
+    getElementsByTagNameNS(namespaceURI: "http://www.w3.org/2000/svg", localName: string): HTMLCollectionOf<SVGElement>;
+    getElementsByTagNameNS(namespaceURI: string, localName: string): HTMLCollectionOf<Element>;
+    hasAttribute(name: string): boolean;
+    hasAttributeNS(namespaceURI: string, localName: string): boolean;
+    msGetRegionContent(): MSRangeCollection;
+    msGetUntransformedBounds(): ClientRect;
+    msMatchesSelector(selectors: string): boolean;
+    msReleasePointerCapture(pointerId: number): void;
+    msSetPointerCapture(pointerId: number): void;
+    msZoomTo(args: MsZoomToOptions): void;
+    releasePointerCapture(pointerId: number): void;
+    removeAttribute(qualifiedName: string): void;
+    removeAttributeNode(oldAttr: Attr): Attr;
+    removeAttributeNS(namespaceURI: string, localName: string): void;
+    requestFullscreen(): void;
+    requestPointerLock(): void;
+    setAttribute(name: string, value: string): void;
+    setAttributeNode(newAttr: Attr): Attr;
+    setAttributeNodeNS(newAttr: Attr): Attr;
+    setAttributeNS(namespaceURI: string, qualifiedName: string, value: string): void;
+    setPointerCapture(pointerId: number): void;
+    webkitMatchesSelector(selectors: string): boolean;
+    webkitRequestFullscreen(): void;
+    webkitRequestFullScreen(): void;
+    getElementsByClassName(classNames: string): NodeListOf<Element>;
+    matches(selector: string): boolean;
+    closest(selector: string): Element | null;
+    scrollIntoView(arg?: boolean | ScrollIntoViewOptions): void;
+    scroll(options?: ScrollToOptions): void;
+    scroll(x: number, y: number): void;
+    scrollTo(options?: ScrollToOptions): void;
+    scrollTo(x: number, y: number): void;
+    scrollBy(options?: ScrollToOptions): void;
+    scrollBy(x: number, y: number): void;
+    insertAdjacentElement(position: InsertPosition, insertedElement: Element): Element | null;
+    insertAdjacentHTML(where: InsertPosition, html: string): void;
+    insertAdjacentText(where: InsertPosition, text: string): void;
+    attachShadow(shadowRootInitDict: ShadowRootInit): ShadowRoot;
+    addEventListener<K extends keyof ElementEventMap>(type: K, listener: (this: Element, ev: ElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var Element: {
+    prototype: Element;
+    new(): Element;
+};
+
+interface ErrorEvent extends Event {
+    readonly colno: number;
+    readonly error: any;
+    readonly filename: string;
+    readonly lineno: number;
+    readonly message: string;
+    initErrorEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, messageArg: string, filenameArg: string, linenoArg: number): void;
+}
+
+declare var ErrorEvent: {
+    prototype: ErrorEvent;
+    new(type: string, errorEventInitDict?: ErrorEventInit): ErrorEvent;
+};
+
+interface Event {
+    readonly bubbles: boolean;
+    readonly cancelable: boolean;
+    cancelBubble: boolean;
+    readonly currentTarget: EventTarget;
+    readonly defaultPrevented: boolean;
+    readonly eventPhase: number;
+    readonly isTrusted: boolean;
+    returnValue: boolean;
+    readonly srcElement: Element | null;
+    readonly target: EventTarget;
+    readonly timeStamp: number;
+    readonly type: string;
+    readonly scoped: boolean;
+    initEvent(eventTypeArg: string, canBubbleArg: boolean, cancelableArg: boolean): void;
+    preventDefault(): void;
+    stopImmediatePropagation(): void;
+    stopPropagation(): void;
+    deepPath(): EventTarget[];
+    readonly AT_TARGET: number;
+    readonly BUBBLING_PHASE: number;
+    readonly CAPTURING_PHASE: number;
+}
+
+declare var Event: {
+    prototype: Event;
+    new(typeArg: string, eventInitDict?: EventInit): Event;
+    readonly AT_TARGET: number;
+    readonly BUBBLING_PHASE: number;
+    readonly CAPTURING_PHASE: number;
+};
+
+interface EventTarget {
+    addEventListener(type: string, listener?: EventListenerOrEventListenerObject, options?: boolean | AddEventListenerOptions): void;
+    dispatchEvent(evt: Event): boolean;
+    removeEventListener(type: string, listener?: EventListenerOrEventListenerObject, options?: boolean | EventListenerOptions): void;
+}
+
+declare var EventTarget: {
+    prototype: EventTarget;
+    new(): EventTarget;
+};
+
+interface EXT_frag_depth {
+}
+
+declare var EXT_frag_depth: {
+    prototype: EXT_frag_depth;
+    new(): EXT_frag_depth;
+};
+
+interface EXT_texture_filter_anisotropic {
+    readonly MAX_TEXTURE_MAX_ANISOTROPY_EXT: number;
+    readonly TEXTURE_MAX_ANISOTROPY_EXT: number;
+}
+
+declare var EXT_texture_filter_anisotropic: {
+    prototype: EXT_texture_filter_anisotropic;
+    new(): EXT_texture_filter_anisotropic;
+    readonly MAX_TEXTURE_MAX_ANISOTROPY_EXT: number;
+    readonly TEXTURE_MAX_ANISOTROPY_EXT: number;
+};
+
+interface ExtensionScriptApis {
+    extensionIdToShortId(extensionId: string): number;
+    fireExtensionApiTelemetry(functionName: string, isSucceeded: boolean, isSupported: boolean): void;
+    genericFunction(routerAddress: any, parameters?: string, callbackId?: number): void;
+    genericSynchronousFunction(functionId: number, parameters?: string): string;
+    getExtensionId(): string;
+    registerGenericFunctionCallbackHandler(callbackHandler: any): void;
+    registerGenericPersistentCallbackHandler(callbackHandler: any): void;
+}
+
+declare var ExtensionScriptApis: {
+    prototype: ExtensionScriptApis;
+    new(): ExtensionScriptApis;
+};
+
+interface External {
+}
+
+declare var External: {
+    prototype: External;
+    new(): External;
+};
+
+interface File extends Blob {
+    readonly lastModifiedDate: any;
+    readonly name: string;
+    readonly webkitRelativePath: string;
+}
+
+declare var File: {
+    prototype: File;
+    new (parts: (ArrayBuffer | ArrayBufferView | Blob | string)[], filename: string, properties?: FilePropertyBag): File;
+};
+
+interface FileList {
+    readonly length: number;
+    item(index: number): File;
+    [index: number]: File;
+}
+
+declare var FileList: {
+    prototype: FileList;
+    new(): FileList;
+};
+
+interface FileReader extends EventTarget, MSBaseReader {
+    readonly error: DOMError;
+    readAsArrayBuffer(blob: Blob): void;
+    readAsBinaryString(blob: Blob): void;
+    readAsDataURL(blob: Blob): void;
+    readAsText(blob: Blob, encoding?: string): void;
+    addEventListener<K extends keyof MSBaseReaderEventMap>(type: K, listener: (this: FileReader, ev: MSBaseReaderEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var FileReader: {
+    prototype: FileReader;
+    new(): FileReader;
+};
+
+interface FocusEvent extends UIEvent {
+    readonly relatedTarget: EventTarget;
+    initFocusEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, relatedTargetArg: EventTarget): void;
+}
+
+declare var FocusEvent: {
+    prototype: FocusEvent;
+    new(typeArg: string, eventInitDict?: FocusEventInit): FocusEvent;
+};
+
+interface FocusNavigationEvent extends Event {
+    readonly navigationReason: NavigationReason;
+    readonly originHeight: number;
+    readonly originLeft: number;
+    readonly originTop: number;
+    readonly originWidth: number;
+    requestFocus(): void;
+}
+
+declare var FocusNavigationEvent: {
+    prototype: FocusNavigationEvent;
+    new(type: string, eventInitDict?: FocusNavigationEventInit): FocusNavigationEvent;
+};
+
+interface FormData {
+    append(name: string, value: string | Blob, fileName?: string): void;
+    delete(name: string): void;
+    get(name: string): FormDataEntryValue | null;
+    getAll(name: string): FormDataEntryValue[];
+    has(name: string): boolean;
+    set(name: string, value: string | Blob, fileName?: string): void;
+}
+
+declare var FormData: {
+    prototype: FormData;
+    new (form?: HTMLFormElement): FormData;
+};
+
+interface GainNode extends AudioNode {
+    readonly gain: AudioParam;
+}
+
+declare var GainNode: {
+    prototype: GainNode;
+    new(): GainNode;
+};
+
+interface Gamepad {
+    readonly axes: number[];
+    readonly buttons: GamepadButton[];
+    readonly connected: boolean;
+    readonly id: string;
+    readonly index: number;
+    readonly mapping: string;
+    readonly timestamp: number;
+}
+
+declare var Gamepad: {
+    prototype: Gamepad;
+    new(): Gamepad;
+};
+
+interface GamepadButton {
+    readonly pressed: boolean;
+    readonly value: number;
+}
+
+declare var GamepadButton: {
+    prototype: GamepadButton;
+    new(): GamepadButton;
+};
+
+interface GamepadEvent extends Event {
+    readonly gamepad: Gamepad;
+}
+
+declare var GamepadEvent: {
+    prototype: GamepadEvent;
+    new(typeArg: string, eventInitDict?: GamepadEventInit): GamepadEvent;
+};
+
+interface Geolocation {
+    clearWatch(watchId: number): void;
+    getCurrentPosition(successCallback: PositionCallback, errorCallback?: PositionErrorCallback, options?: PositionOptions): void;
+    watchPosition(successCallback: PositionCallback, errorCallback?: PositionErrorCallback, options?: PositionOptions): number;
+}
+
+declare var Geolocation: {
+    prototype: Geolocation;
+    new(): Geolocation;
+};
+
+interface HashChangeEvent extends Event {
+    readonly newURL: string | null;
+    readonly oldURL: string | null;
+}
+
+declare var HashChangeEvent: {
+    prototype: HashChangeEvent;
+    new(typeArg: string, eventInitDict?: HashChangeEventInit): HashChangeEvent;
+};
+
+interface Headers {
+    append(name: string, value: string): void;
+    delete(name: string): void;
+    forEach(callback: ForEachCallback): void;
+    get(name: string): string | null;
+    has(name: string): boolean;
+    set(name: string, value: string): void;
+}
+
+declare var Headers: {
+    prototype: Headers;
+    new(init?: any): Headers;
+};
+
+interface History {
+    readonly length: number;
+    readonly state: any;
+    scrollRestoration: ScrollRestoration;
+    back(): void;
+    forward(): void;
+    go(delta?: number): void;
+    pushState(data: any, title: string, url?: string | null): void;
+    replaceState(data: any, title: string, url?: string | null): void;
+}
+
+declare var History: {
+    prototype: History;
+    new(): History;
+};
+
+interface HTMLAllCollection {
+    readonly length: number;
+    item(nameOrIndex?: string): HTMLCollection | Element | null;
+    namedItem(name: string): HTMLCollection | Element | null;
+    [index: number]: Element;
+}
+
+declare var HTMLAllCollection: {
+    prototype: HTMLAllCollection;
+    new(): HTMLAllCollection;
+};
+
+interface HTMLAnchorElement extends HTMLElement {
+    /**
+     * Sets or retrieves the character set used to encode the object.
+     */
+    charset: string;
+    /**
+     * Sets or retrieves the coordinates of the object.
+     */
+    coords: string;
+    download: string;
+    /**
+     * Contains the anchor portion of the URL including the hash sign (#).
+     */
+    hash: string;
+    /**
+     * Contains the hostname and port values of the URL.
+     */
+    host: string;
+    /**
+     * Contains the hostname of a URL.
+     */
+    hostname: string;
+    /**
+     * Sets or retrieves a destination URL or an anchor point.
+     */
+    href: string;
+    /**
+     * Sets or retrieves the language code of the object.
+     */
+    hreflang: string;
+    Methods: string;
+    readonly mimeType: string;
+    /**
+     * Sets or retrieves the shape of the object.
+     */
+    name: string;
+    readonly nameProp: string;
+    /**
+     * Contains the pathname of the URL.
+     */
+    pathname: string;
+    /**
+     * Sets or retrieves the port number associated with a URL.
+     */
+    port: string;
+    /**
+     * Contains the protocol of the URL.
+     */
+    protocol: string;
+    readonly protocolLong: string;
+    /**
+     * Sets or retrieves the relationship between the object and the destination of the link.
+     */
+    rel: string;
+    /**
+     * Sets or retrieves the relationship between the object and the destination of the link.
+     */
+    rev: string;
+    /**
+     * Sets or retrieves the substring of the href property that follows the question mark.
+     */
+    search: string;
+    /**
+     * Sets or retrieves the shape of the object.
+     */
+    shape: string;
+    /**
+     * Sets or retrieves the window or frame at which to target content.
+     */
+    target: string;
+    /**
+     * Retrieves or sets the text of the object as a string.
+     */
+    text: string;
+    type: string;
+    urn: string;
+    /**
+     * Returns a string representation of an object.
+     */
+    toString(): string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLAnchorElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLAnchorElement: {
+    prototype: HTMLAnchorElement;
+    new(): HTMLAnchorElement;
+};
+
+interface HTMLAppletElement extends HTMLElement {
+    align: string;
+    /**
+     * Sets or retrieves a text alternative to the graphic.
+     */
+    alt: string;
+    /**
+     * Gets or sets the optional alternative HTML script to execute if the object fails to load.
+     */
+    altHtml: string;
+    /**
+     * Sets or retrieves a character string that can be used to implement your own archive functionality for the object.
+     */
+    archive: string;
+    /**
+     * Retrieves a string of the URL where the object tag can be found. This is often the href of the document that the object is in, or the value set by a base element.
+     */
+    readonly BaseHref: string;
+    border: string;
+    code: string;
+    /**
+     * Sets or retrieves the URL of the component.
+     */
+    codeBase: string;
+    /**
+     * Sets or retrieves the Internet media type for the code associated with the object.
+     */
+    codeType: string;
+    /**
+     * Address of a pointer to the document this page or frame contains. If there is no document, then null will be returned.
+     */
+    readonly contentDocument: Document;
+    /**
+     * Sets or retrieves the URL that references the data of the object.
+     */
+    data: string;
+    /**
+     * Sets or retrieves a character string that can be used to implement your own declare functionality for the object.
+     */
+    declare: boolean;
+    readonly form: HTMLFormElement;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: string;
+    hspace: number;
+    /**
+     * Sets or retrieves the shape of the object.
+     */
+    name: string;
+    object: string | null;
+    /**
+     * Sets or retrieves a message to be displayed while an object is loading.
+     */
+    standby: string;
+    /**
+     * Returns the content type of the object.
+     */
+    type: string;
+    /**
+     * Sets or retrieves the URL, often with a bookmark extension (#name), to use as a client-side image map.
+     */
+    useMap: string;
+    vspace: number;
+    width: number;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLAppletElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLAppletElement: {
+    prototype: HTMLAppletElement;
+    new(): HTMLAppletElement;
+};
+
+interface HTMLAreaElement extends HTMLElement {
+    /**
+     * Sets or retrieves a text alternative to the graphic.
+     */
+    alt: string;
+    /**
+     * Sets or retrieves the coordinates of the object.
+     */
+    coords: string;
+    download: string;
+    /**
+     * Sets or retrieves the subsection of the href property that follows the number sign (#).
+     */
+    hash: string;
+    /**
+     * Sets or retrieves the hostname and port number of the location or URL.
+     */
+    host: string;
+    /**
+     * Sets or retrieves the host name part of the location or URL.
+     */
+    hostname: string;
+    /**
+     * Sets or retrieves a destination URL or an anchor point.
+     */
+    href: string;
+    /**
+     * Sets or gets whether clicks in this region cause action.
+     */
+    noHref: boolean;
+    /**
+     * Sets or retrieves the file name or path specified by the object.
+     */
+    pathname: string;
+    /**
+     * Sets or retrieves the port number associated with a URL.
+     */
+    port: string;
+    /**
+     * Sets or retrieves the protocol portion of a URL.
+     */
+    protocol: string;
+    rel: string;
+    /**
+     * Sets or retrieves the substring of the href property that follows the question mark.
+     */
+    search: string;
+    /**
+     * Sets or retrieves the shape of the object.
+     */
+    shape: string;
+    /**
+     * Sets or retrieves the window or frame at which to target content.
+     */
+    target: string;
+    /**
+     * Returns a string representation of an object.
+     */
+    toString(): string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLAreaElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLAreaElement: {
+    prototype: HTMLAreaElement;
+    new(): HTMLAreaElement;
+};
+
+interface HTMLAreasCollection extends HTMLCollectionBase {
+}
+
+declare var HTMLAreasCollection: {
+    prototype: HTMLAreasCollection;
+    new(): HTMLAreasCollection;
+};
+
+interface HTMLAudioElement extends HTMLMediaElement {
+    addEventListener<K extends keyof HTMLMediaElementEventMap>(type: K, listener: (this: HTMLAudioElement, ev: HTMLMediaElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLAudioElement: {
+    prototype: HTMLAudioElement;
+    new(): HTMLAudioElement;
+};
+
+interface HTMLBaseElement extends HTMLElement {
+    /**
+     * Gets or sets the baseline URL on which relative links are based.
+     */
+    href: string;
+    /**
+     * Sets or retrieves the window or frame at which to target content.
+     */
+    target: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLBaseElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLBaseElement: {
+    prototype: HTMLBaseElement;
+    new(): HTMLBaseElement;
+};
+
+interface HTMLBaseFontElement extends HTMLElement, DOML2DeprecatedColorProperty {
+    /**
+     * Sets or retrieves the current typeface family.
+     */
+    face: string;
+    /**
+     * Sets or retrieves the font size of the object.
+     */
+    size: number;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLBaseFontElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLBaseFontElement: {
+    prototype: HTMLBaseFontElement;
+    new(): HTMLBaseFontElement;
+};
+
+interface HTMLBodyElementEventMap extends HTMLElementEventMap {
+    "afterprint": Event;
+    "beforeprint": Event;
+    "beforeunload": BeforeUnloadEvent;
+    "blur": FocusEvent;
+    "error": ErrorEvent;
+    "focus": FocusEvent;
+    "hashchange": HashChangeEvent;
+    "load": Event;
+    "message": MessageEvent;
+    "offline": Event;
+    "online": Event;
+    "orientationchange": Event;
+    "pagehide": PageTransitionEvent;
+    "pageshow": PageTransitionEvent;
+    "popstate": PopStateEvent;
+    "resize": UIEvent;
+    "scroll": UIEvent;
+    "storage": StorageEvent;
+    "unload": Event;
+}
+
+interface HTMLBodyElement extends HTMLElement {
+    aLink: any;
+    background: string;
+    bgColor: any;
+    bgProperties: string;
+    link: any;
+    noWrap: boolean;
+    onafterprint: (this: HTMLBodyElement, ev: Event) => any;
+    onbeforeprint: (this: HTMLBodyElement, ev: Event) => any;
+    onbeforeunload: (this: HTMLBodyElement, ev: BeforeUnloadEvent) => any;
+    onblur: (this: HTMLBodyElement, ev: FocusEvent) => any;
+    onerror: (this: HTMLBodyElement, ev: ErrorEvent) => any;
+    onfocus: (this: HTMLBodyElement, ev: FocusEvent) => any;
+    onhashchange: (this: HTMLBodyElement, ev: HashChangeEvent) => any;
+    onload: (this: HTMLBodyElement, ev: Event) => any;
+    onmessage: (this: HTMLBodyElement, ev: MessageEvent) => any;
+    onoffline: (this: HTMLBodyElement, ev: Event) => any;
+    ononline: (this: HTMLBodyElement, ev: Event) => any;
+    onorientationchange: (this: HTMLBodyElement, ev: Event) => any;
+    onpagehide: (this: HTMLBodyElement, ev: PageTransitionEvent) => any;
+    onpageshow: (this: HTMLBodyElement, ev: PageTransitionEvent) => any;
+    onpopstate: (this: HTMLBodyElement, ev: PopStateEvent) => any;
+    onresize: (this: HTMLBodyElement, ev: UIEvent) => any;
+    onscroll: (this: HTMLBodyElement, ev: UIEvent) => any;
+    onstorage: (this: HTMLBodyElement, ev: StorageEvent) => any;
+    onunload: (this: HTMLBodyElement, ev: Event) => any;
+    text: any;
+    vLink: any;
+    addEventListener<K extends keyof HTMLBodyElementEventMap>(type: K, listener: (this: HTMLBodyElement, ev: HTMLBodyElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLBodyElement: {
+    prototype: HTMLBodyElement;
+    new(): HTMLBodyElement;
+};
+
+interface HTMLBRElement extends HTMLElement {
+    /**
+     * Sets or retrieves the side on which floating objects are not to be positioned when any IHTMLBlockElement is inserted into the document.
+     */
+    clear: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLBRElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLBRElement: {
+    prototype: HTMLBRElement;
+    new(): HTMLBRElement;
+};
+
+interface HTMLButtonElement extends HTMLElement {
+    /**
+     * Provides a way to direct a user to a specific field when a document loads. This can provide both direction and convenience for a user, reducing the need to click or tab to a field when a page opens. This attribute is true when present on an element, and false when missing.
+     */
+    autofocus: boolean;
+    disabled: boolean;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Overrides the action attribute (where the data on a form is sent) on the parent form element.
+     */
+    formAction: string;
+    /**
+     * Used to override the encoding (formEnctype attribute) specified on the form element.
+     */
+    formEnctype: string;
+    /**
+     * Overrides the submit method attribute previously specified on a form element.
+     */
+    formMethod: string;
+    /**
+     * Overrides any validation or required attributes on a form or form elements to allow it to be submitted without validation. This can be used to create a "save draft"-type submit option.
+     */
+    formNoValidate: string;
+    /**
+     * Overrides the target attribute on a form element.
+     */
+    formTarget: string;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    status: any;
+    /**
+     * Gets the classification and default behavior of the button.
+     */
+    type: string;
+    /**
+     * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
+     */
+    readonly validationMessage: string;
+    /**
+     * Returns a  ValidityState object that represents the validity states of an element.
+     */
+    readonly validity: ValidityState;
+    /**
+     * Sets or retrieves the default or selected value of the control.
+     */
+    value: string;
+    /**
+     * Returns whether an element will successfully validate based on forms validation rules and constraints.
+     */
+    readonly willValidate: boolean;
+    /**
+     * Returns whether a form will validate when it is submitted, without having to submit it.
+     */
+    checkValidity(): boolean;
+    /**
+     * Sets a custom error message that is displayed when a form is submitted.
+     * @param error Sets a custom error message that is displayed when a form is submitted.
+     */
+    setCustomValidity(error: string): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLButtonElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLButtonElement: {
+    prototype: HTMLButtonElement;
+    new(): HTMLButtonElement;
+};
+
+interface HTMLCanvasElement extends HTMLElement {
+    /**
+     * Gets or sets the height of a canvas element on a document.
+     */
+    height: number;
+    /**
+     * Gets or sets the width of a canvas element on a document.
+     */
+    width: number;
+    /**
+     * Returns an object that provides methods and properties for drawing and manipulating images and graphics on a canvas element in a document. A context object includes information about colors, line widths, fonts, and other graphic parameters that can be drawn on a canvas.
+     * @param contextId The identifier (ID) of the type of canvas to create. Internet Explorer 9 and Internet Explorer 10 support only a 2-D context using canvas.getContext("2d"); IE11 Preview also supports 3-D or WebGL context using canvas.getContext("experimental-webgl");
+     */
+    getContext(contextId: "2d", contextAttributes?: Canvas2DContextAttributes): CanvasRenderingContext2D | null;
+    getContext(contextId: "webgl" | "experimental-webgl", contextAttributes?: WebGLContextAttributes): WebGLRenderingContext | null;
+    getContext(contextId: string, contextAttributes?: {}): CanvasRenderingContext2D | WebGLRenderingContext | null;
+    /**
+     * Returns a blob object encoded as a Portable Network Graphics (PNG) format from a canvas image or drawing.
+     */
+    msToBlob(): Blob;
+    /**
+     * Returns the content of the current canvas as an image that you can use as a source for another canvas or an HTML element.
+     * @param type The standard MIME type for the image format to return. If you do not specify this parameter, the default value is a PNG format image.
+     */
+    toDataURL(type?: string, ...args: any[]): string;
+    toBlob(callback: (result: Blob | null) => void, type?: string, ...arguments: any[]): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLCanvasElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLCanvasElement: {
+    prototype: HTMLCanvasElement;
+    new(): HTMLCanvasElement;
+};
+
+interface HTMLCollectionBase {
+    /**
+     * Sets or retrieves the number of objects in a collection.
+     */
+    readonly length: number;
+    /**
+     * Retrieves an object from various collections.
+     */
+    item(index: number): Element;
+    [index: number]: Element;
+}
+
+interface HTMLCollection extends HTMLCollectionBase {
+    /**
+     * Retrieves a select object or an object from an options collection.
+     */
+    namedItem(name: string): Element | null;
+}
+
+declare var HTMLCollection: {
+    prototype: HTMLCollection;
+    new(): HTMLCollection;
+};
+
+interface HTMLDataElement extends HTMLElement {
+    value: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLDataElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLDataElement: {
+    prototype: HTMLDataElement;
+    new(): HTMLDataElement;
+};
+
+interface HTMLDataListElement extends HTMLElement {
+    options: HTMLCollectionOf<HTMLOptionElement>;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLDataListElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLDataListElement: {
+    prototype: HTMLDataListElement;
+    new(): HTMLDataListElement;
+};
+
+interface HTMLDirectoryElement extends HTMLElement {
+    compact: boolean;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLDirectoryElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLDirectoryElement: {
+    prototype: HTMLDirectoryElement;
+    new(): HTMLDirectoryElement;
+};
+
+interface HTMLDivElement extends HTMLElement {
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    /**
+     * Sets or retrieves whether the browser automatically performs wordwrap.
+     */
+    noWrap: boolean;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLDivElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLDivElement: {
+    prototype: HTMLDivElement;
+    new(): HTMLDivElement;
+};
+
+interface HTMLDListElement extends HTMLElement {
+    compact: boolean;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLDListElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLDListElement: {
+    prototype: HTMLDListElement;
+    new(): HTMLDListElement;
+};
+
+interface HTMLDocument extends Document {
+    addEventListener<K extends keyof DocumentEventMap>(type: K, listener: (this: HTMLDocument, ev: DocumentEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLDocument: {
+    prototype: HTMLDocument;
+    new(): HTMLDocument;
+};
+
+interface HTMLElementEventMap extends ElementEventMap {
+    "abort": UIEvent;
+    "activate": UIEvent;
+    "beforeactivate": UIEvent;
+    "beforecopy": ClipboardEvent;
+    "beforecut": ClipboardEvent;
+    "beforedeactivate": UIEvent;
+    "beforepaste": ClipboardEvent;
+    "blur": FocusEvent;
+    "canplay": Event;
+    "canplaythrough": Event;
+    "change": Event;
+    "click": MouseEvent;
+    "contextmenu": PointerEvent;
+    "copy": ClipboardEvent;
+    "cuechange": Event;
+    "cut": ClipboardEvent;
+    "dblclick": MouseEvent;
+    "deactivate": UIEvent;
+    "drag": DragEvent;
+    "dragend": DragEvent;
+    "dragenter": DragEvent;
+    "dragleave": DragEvent;
+    "dragover": DragEvent;
+    "dragstart": DragEvent;
+    "drop": DragEvent;
+    "durationchange": Event;
+    "emptied": Event;
+    "ended": MediaStreamErrorEvent;
+    "error": ErrorEvent;
+    "focus": FocusEvent;
+    "input": Event;
+    "invalid": Event;
+    "keydown": KeyboardEvent;
+    "keypress": KeyboardEvent;
+    "keyup": KeyboardEvent;
+    "load": Event;
+    "loadeddata": Event;
+    "loadedmetadata": Event;
+    "loadstart": Event;
+    "mousedown": MouseEvent;
+    "mouseenter": MouseEvent;
+    "mouseleave": MouseEvent;
+    "mousemove": MouseEvent;
+    "mouseout": MouseEvent;
+    "mouseover": MouseEvent;
+    "mouseup": MouseEvent;
+    "mousewheel": WheelEvent;
+    "MSContentZoom": UIEvent;
+    "MSManipulationStateChanged": MSManipulationEvent;
+    "paste": ClipboardEvent;
+    "pause": Event;
+    "play": Event;
+    "playing": Event;
+    "progress": ProgressEvent;
+    "ratechange": Event;
+    "reset": Event;
+    "scroll": UIEvent;
+    "seeked": Event;
+    "seeking": Event;
+    "select": UIEvent;
+    "selectstart": Event;
+    "stalled": Event;
+    "submit": Event;
+    "suspend": Event;
+    "timeupdate": Event;
+    "volumechange": Event;
+    "waiting": Event;
+}
+
+interface HTMLElement extends Element {
+    accessKey: string;
+    readonly children: HTMLCollection;
+    contentEditable: string;
+    readonly dataset: DOMStringMap;
+    dir: string;
+    draggable: boolean;
+    hidden: boolean;
+    hideFocus: boolean;
+    innerText: string;
+    readonly isContentEditable: boolean;
+    lang: string;
+    readonly offsetHeight: number;
+    readonly offsetLeft: number;
+    readonly offsetParent: Element;
+    readonly offsetTop: number;
+    readonly offsetWidth: number;
+    onabort: (this: HTMLElement, ev: UIEvent) => any;
+    onactivate: (this: HTMLElement, ev: UIEvent) => any;
+    onbeforeactivate: (this: HTMLElement, ev: UIEvent) => any;
+    onbeforecopy: (this: HTMLElement, ev: ClipboardEvent) => any;
+    onbeforecut: (this: HTMLElement, ev: ClipboardEvent) => any;
+    onbeforedeactivate: (this: HTMLElement, ev: UIEvent) => any;
+    onbeforepaste: (this: HTMLElement, ev: ClipboardEvent) => any;
+    onblur: (this: HTMLElement, ev: FocusEvent) => any;
+    oncanplay: (this: HTMLElement, ev: Event) => any;
+    oncanplaythrough: (this: HTMLElement, ev: Event) => any;
+    onchange: (this: HTMLElement, ev: Event) => any;
+    onclick: (this: HTMLElement, ev: MouseEvent) => any;
+    oncontextmenu: (this: HTMLElement, ev: PointerEvent) => any;
+    oncopy: (this: HTMLElement, ev: ClipboardEvent) => any;
+    oncuechange: (this: HTMLElement, ev: Event) => any;
+    oncut: (this: HTMLElement, ev: ClipboardEvent) => any;
+    ondblclick: (this: HTMLElement, ev: MouseEvent) => any;
+    ondeactivate: (this: HTMLElement, ev: UIEvent) => any;
+    ondrag: (this: HTMLElement, ev: DragEvent) => any;
+    ondragend: (this: HTMLElement, ev: DragEvent) => any;
+    ondragenter: (this: HTMLElement, ev: DragEvent) => any;
+    ondragleave: (this: HTMLElement, ev: DragEvent) => any;
+    ondragover: (this: HTMLElement, ev: DragEvent) => any;
+    ondragstart: (this: HTMLElement, ev: DragEvent) => any;
+    ondrop: (this: HTMLElement, ev: DragEvent) => any;
+    ondurationchange: (this: HTMLElement, ev: Event) => any;
+    onemptied: (this: HTMLElement, ev: Event) => any;
+    onended: (this: HTMLElement, ev: MediaStreamErrorEvent) => any;
+    onerror: (this: HTMLElement, ev: ErrorEvent) => any;
+    onfocus: (this: HTMLElement, ev: FocusEvent) => any;
+    oninput: (this: HTMLElement, ev: Event) => any;
+    oninvalid: (this: HTMLElement, ev: Event) => any;
+    onkeydown: (this: HTMLElement, ev: KeyboardEvent) => any;
+    onkeypress: (this: HTMLElement, ev: KeyboardEvent) => any;
+    onkeyup: (this: HTMLElement, ev: KeyboardEvent) => any;
+    onload: (this: HTMLElement, ev: Event) => any;
+    onloadeddata: (this: HTMLElement, ev: Event) => any;
+    onloadedmetadata: (this: HTMLElement, ev: Event) => any;
+    onloadstart: (this: HTMLElement, ev: Event) => any;
+    onmousedown: (this: HTMLElement, ev: MouseEvent) => any;
+    onmouseenter: (this: HTMLElement, ev: MouseEvent) => any;
+    onmouseleave: (this: HTMLElement, ev: MouseEvent) => any;
+    onmousemove: (this: HTMLElement, ev: MouseEvent) => any;
+    onmouseout: (this: HTMLElement, ev: MouseEvent) => any;
+    onmouseover: (this: HTMLElement, ev: MouseEvent) => any;
+    onmouseup: (this: HTMLElement, ev: MouseEvent) => any;
+    onmousewheel: (this: HTMLElement, ev: WheelEvent) => any;
+    onmscontentzoom: (this: HTMLElement, ev: UIEvent) => any;
+    onmsmanipulationstatechanged: (this: HTMLElement, ev: MSManipulationEvent) => any;
+    onpaste: (this: HTMLElement, ev: ClipboardEvent) => any;
+    onpause: (this: HTMLElement, ev: Event) => any;
+    onplay: (this: HTMLElement, ev: Event) => any;
+    onplaying: (this: HTMLElement, ev: Event) => any;
+    onprogress: (this: HTMLElement, ev: ProgressEvent) => any;
+    onratechange: (this: HTMLElement, ev: Event) => any;
+    onreset: (this: HTMLElement, ev: Event) => any;
+    onscroll: (this: HTMLElement, ev: UIEvent) => any;
+    onseeked: (this: HTMLElement, ev: Event) => any;
+    onseeking: (this: HTMLElement, ev: Event) => any;
+    onselect: (this: HTMLElement, ev: UIEvent) => any;
+    onselectstart: (this: HTMLElement, ev: Event) => any;
+    onstalled: (this: HTMLElement, ev: Event) => any;
+    onsubmit: (this: HTMLElement, ev: Event) => any;
+    onsuspend: (this: HTMLElement, ev: Event) => any;
+    ontimeupdate: (this: HTMLElement, ev: Event) => any;
+    onvolumechange: (this: HTMLElement, ev: Event) => any;
+    onwaiting: (this: HTMLElement, ev: Event) => any;
+    outerText: string;
+    spellcheck: boolean;
+    readonly style: CSSStyleDeclaration;
+    tabIndex: number;
+    title: string;
+    blur(): void;
+    click(): void;
+    dragDrop(): boolean;
+    focus(): void;
+    msGetInputContext(): MSInputMethodContext;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLElement: {
+    prototype: HTMLElement;
+    new(): HTMLElement;
+};
+
+interface HTMLEmbedElement extends HTMLElement, GetSVGDocument {
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: string;
+    hidden: any;
+    /**
+     * Gets or sets whether the DLNA PlayTo device is available.
+     */
+    msPlayToDisabled: boolean;
+    /**
+     * Gets or sets the path to the preferred media source. This enables the Play To target device to stream the media content, which can be DRM protected, from a different location, such as a cloud media server.
+     */
+    msPlayToPreferredSourceUri: string;
+    /**
+     * Gets or sets the primary DLNA PlayTo device.
+     */
+    msPlayToPrimary: boolean;
+    /**
+     * Gets the source associated with the media element for use by the PlayToManager.
+     */
+    readonly msPlayToSource: any;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    /**
+     * Retrieves the palette used for the embedded document.
+     */
+    readonly palette: string;
+    /**
+     * Retrieves the URL of the plug-in used to view an embedded document.
+     */
+    readonly pluginspage: string;
+    readonly readyState: string;
+    /**
+     * Sets or retrieves a URL to be loaded by the object.
+     */
+    src: string;
+    /**
+     * Sets or retrieves the height and width units of the embed object.
+     */
+    units: string;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLEmbedElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLEmbedElement: {
+    prototype: HTMLEmbedElement;
+    new(): HTMLEmbedElement;
+};
+
+interface HTMLFieldSetElement extends HTMLElement {
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    disabled: boolean;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    name: string;
+    /**
+     * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
+     */
+    readonly validationMessage: string;
+    /**
+     * Returns a  ValidityState object that represents the validity states of an element.
+     */
+    readonly validity: ValidityState;
+    /**
+     * Returns whether an element will successfully validate based on forms validation rules and constraints.
+     */
+    readonly willValidate: boolean;
+    /**
+     * Returns whether a form will validate when it is submitted, without having to submit it.
+     */
+    checkValidity(): boolean;
+    /**
+     * Sets a custom error message that is displayed when a form is submitted.
+     * @param error Sets a custom error message that is displayed when a form is submitted.
+     */
+    setCustomValidity(error: string): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLFieldSetElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLFieldSetElement: {
+    prototype: HTMLFieldSetElement;
+    new(): HTMLFieldSetElement;
+};
+
+interface HTMLFontElement extends HTMLElement, DOML2DeprecatedColorProperty, DOML2DeprecatedSizeProperty {
+    /**
+     * Sets or retrieves the current typeface family.
+     */
+    face: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLFontElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLFontElement: {
+    prototype: HTMLFontElement;
+    new(): HTMLFontElement;
+};
+
+interface HTMLFormControlsCollection extends HTMLCollectionBase {
+    namedItem(name: string): HTMLCollection | Element | null;
+}
+
+declare var HTMLFormControlsCollection: {
+    prototype: HTMLFormControlsCollection;
+    new(): HTMLFormControlsCollection;
+};
+
+interface HTMLFormElement extends HTMLElement {
+    /**
+     * Sets or retrieves a list of character encodings for input data that must be accepted by the server processing the form.
+     */
+    acceptCharset: string;
+    /**
+     * Sets or retrieves the URL to which the form content is sent for processing.
+     */
+    action: string;
+    /**
+     * Specifies whether autocomplete is applied to an editable text field.
+     */
+    autocomplete: string;
+    /**
+     * Retrieves a collection, in source order, of all controls in a given form.
+     */
+    readonly elements: HTMLFormControlsCollection;
+    /**
+     * Sets or retrieves the MIME encoding for the form.
+     */
+    encoding: string;
+    /**
+     * Sets or retrieves the encoding type for the form.
+     */
+    enctype: string;
+    /**
+     * Sets or retrieves the number of objects in a collection.
+     */
+    readonly length: number;
+    /**
+     * Sets or retrieves how to send the form data to the server.
+     */
+    method: string;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    /**
+     * Designates a form that is not validated when submitted.
+     */
+    noValidate: boolean;
+    /**
+     * Sets or retrieves the window or frame at which to target content.
+     */
+    target: string;
+    /**
+     * Returns whether a form will validate when it is submitted, without having to submit it.
+     */
+    checkValidity(): boolean;
+    /**
+     * Retrieves a form object or an object from an elements collection.
+     * @param name Variant of type Number or String that specifies the object or collection to retrieve. If this parameter is a Number, it is the zero-based index of the object. If this parameter is a string, all objects with matching name or id properties are retrieved, and a collection is returned if more than one match is made.
+     * @param index Variant of type Number that specifies the zero-based index of the object to retrieve when a collection is returned.
+     */
+    item(name?: any, index?: any): any;
+    /**
+     * Retrieves a form object or an object from an elements collection.
+     */
+    namedItem(name: string): any;
+    /**
+     * Fires when the user resets a form.
+     */
+    reset(): void;
+    /**
+     * Fires when a FORM is about to be submitted.
+     */
+    submit(): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLFormElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+    [name: string]: any;
+}
+
+declare var HTMLFormElement: {
+    prototype: HTMLFormElement;
+    new(): HTMLFormElement;
+};
+
+interface HTMLFrameElementEventMap extends HTMLElementEventMap {
+    "load": Event;
+}
+
+interface HTMLFrameElement extends HTMLElement, GetSVGDocument {
+    /**
+     * Specifies the properties of a border drawn around an object.
+     */
+    border: string;
+    /**
+     * Sets or retrieves the border color of the object.
+     */
+    borderColor: any;
+    /**
+     * Retrieves the document object of the page or frame.
+     */
+    readonly contentDocument: Document;
+    /**
+     * Retrieves the object of the specified.
+     */
+    readonly contentWindow: Window;
+    /**
+     * Sets or retrieves whether to display a border for the frame.
+     */
+    frameBorder: string;
+    /**
+     * Sets or retrieves the amount of additional space between the frames.
+     */
+    frameSpacing: any;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: string | number;
+    /**
+     * Sets or retrieves a URI to a long description of the object.
+     */
+    longDesc: string;
+    /**
+     * Sets or retrieves the top and bottom margin heights before displaying the text in a frame.
+     */
+    marginHeight: string;
+    /**
+     * Sets or retrieves the left and right margin widths before displaying the text in a frame.
+     */
+    marginWidth: string;
+    /**
+     * Sets or retrieves the frame name.
+     */
+    name: string;
+    /**
+     * Sets or retrieves whether the user can resize the frame.
+     */
+    noResize: boolean;
+    /**
+     * Raised when the object has been completely received from the server.
+     */
+    onload: (this: HTMLFrameElement, ev: Event) => any;
+    /**
+     * Sets or retrieves whether the frame can be scrolled.
+     */
+    scrolling: string;
+    /**
+     * Sets or retrieves a URL to be loaded by the object.
+     */
+    src: string;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: string | number;
+    addEventListener<K extends keyof HTMLFrameElementEventMap>(type: K, listener: (this: HTMLFrameElement, ev: HTMLFrameElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLFrameElement: {
+    prototype: HTMLFrameElement;
+    new(): HTMLFrameElement;
+};
+
+interface HTMLFrameSetElementEventMap extends HTMLElementEventMap {
+    "afterprint": Event;
+    "beforeprint": Event;
+    "beforeunload": BeforeUnloadEvent;
+    "blur": FocusEvent;
+    "error": ErrorEvent;
+    "focus": FocusEvent;
+    "hashchange": HashChangeEvent;
+    "load": Event;
+    "message": MessageEvent;
+    "offline": Event;
+    "online": Event;
+    "orientationchange": Event;
+    "pagehide": PageTransitionEvent;
+    "pageshow": PageTransitionEvent;
+    "popstate": PopStateEvent;
+    "resize": UIEvent;
+    "scroll": UIEvent;
+    "storage": StorageEvent;
+    "unload": Event;
+}
+
+interface HTMLFrameSetElement extends HTMLElement {
+    border: string;
+    /**
+     * Sets or retrieves the border color of the object.
+     */
+    borderColor: any;
+    /**
+     * Sets or retrieves the frame widths of the object.
+     */
+    cols: string;
+    /**
+     * Sets or retrieves whether to display a border for the frame.
+     */
+    frameBorder: string;
+    /**
+     * Sets or retrieves the amount of additional space between the frames.
+     */
+    frameSpacing: any;
+    name: string;
+    onafterprint: (this: HTMLFrameSetElement, ev: Event) => any;
+    onbeforeprint: (this: HTMLFrameSetElement, ev: Event) => any;
+    onbeforeunload: (this: HTMLFrameSetElement, ev: BeforeUnloadEvent) => any;
+    /**
+     * Fires when the object loses the input focus.
+     */
+    onblur: (this: HTMLFrameSetElement, ev: FocusEvent) => any;
+    onerror: (this: HTMLFrameSetElement, ev: ErrorEvent) => any;
+    /**
+     * Fires when the object receives focus.
+     */
+    onfocus: (this: HTMLFrameSetElement, ev: FocusEvent) => any;
+    onhashchange: (this: HTMLFrameSetElement, ev: HashChangeEvent) => any;
+    onload: (this: HTMLFrameSetElement, ev: Event) => any;
+    onmessage: (this: HTMLFrameSetElement, ev: MessageEvent) => any;
+    onoffline: (this: HTMLFrameSetElement, ev: Event) => any;
+    ononline: (this: HTMLFrameSetElement, ev: Event) => any;
+    onorientationchange: (this: HTMLFrameSetElement, ev: Event) => any;
+    onpagehide: (this: HTMLFrameSetElement, ev: PageTransitionEvent) => any;
+    onpageshow: (this: HTMLFrameSetElement, ev: PageTransitionEvent) => any;
+    onpopstate: (this: HTMLFrameSetElement, ev: PopStateEvent) => any;
+    onresize: (this: HTMLFrameSetElement, ev: UIEvent) => any;
+    onscroll: (this: HTMLFrameSetElement, ev: UIEvent) => any;
+    onstorage: (this: HTMLFrameSetElement, ev: StorageEvent) => any;
+    onunload: (this: HTMLFrameSetElement, ev: Event) => any;
+    /**
+     * Sets or retrieves the frame heights of the object.
+     */
+    rows: string;
+    addEventListener<K extends keyof HTMLFrameSetElementEventMap>(type: K, listener: (this: HTMLFrameSetElement, ev: HTMLFrameSetElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLFrameSetElement: {
+    prototype: HTMLFrameSetElement;
+    new(): HTMLFrameSetElement;
+};
+
+interface HTMLHeadElement extends HTMLElement {
+    profile: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLHeadElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLHeadElement: {
+    prototype: HTMLHeadElement;
+    new(): HTMLHeadElement;
+};
+
+interface HTMLHeadingElement extends HTMLElement {
+    /**
+     * Sets or retrieves a value that indicates the table alignment.
+     */
+    align: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLHeadingElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLHeadingElement: {
+    prototype: HTMLHeadingElement;
+    new(): HTMLHeadingElement;
+};
+
+interface HTMLHRElement extends HTMLElement, DOML2DeprecatedColorProperty, DOML2DeprecatedSizeProperty {
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    /**
+     * Sets or retrieves whether the horizontal rule is drawn with 3-D shading.
+     */
+    noShade: boolean;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: number;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLHRElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLHRElement: {
+    prototype: HTMLHRElement;
+    new(): HTMLHRElement;
+};
+
+interface HTMLHtmlElement extends HTMLElement {
+    /**
+     * Sets or retrieves the DTD version that governs the current document.
+     */
+    version: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLHtmlElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLHtmlElement: {
+    prototype: HTMLHtmlElement;
+    new(): HTMLHtmlElement;
+};
+
+interface HTMLIFrameElementEventMap extends HTMLElementEventMap {
+    "load": Event;
+}
+
+interface HTMLIFrameElement extends HTMLElement, GetSVGDocument {
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    allowFullscreen: boolean;
+    allowPaymentRequest: boolean;
+    /**
+     * Specifies the properties of a border drawn around an object.
+     */
+    border: string;
+    /**
+     * Retrieves the document object of the page or frame.
+     */
+    readonly contentDocument: Document;
+    /**
+     * Retrieves the object of the specified.
+     */
+    readonly contentWindow: Window;
+    /**
+     * Sets or retrieves whether to display a border for the frame.
+     */
+    frameBorder: string;
+    /**
+     * Sets or retrieves the amount of additional space between the frames.
+     */
+    frameSpacing: any;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: string;
+    /**
+     * Sets or retrieves the horizontal margin for the object.
+     */
+    hspace: number;
+    /**
+     * Sets or retrieves a URI to a long description of the object.
+     */
+    longDesc: string;
+    /**
+     * Sets or retrieves the top and bottom margin heights before displaying the text in a frame.
+     */
+    marginHeight: string;
+    /**
+     * Sets or retrieves the left and right margin widths before displaying the text in a frame.
+     */
+    marginWidth: string;
+    /**
+     * Sets or retrieves the frame name.
+     */
+    name: string;
+    /**
+     * Sets or retrieves whether the user can resize the frame.
+     */
+    noResize: boolean;
+    /**
+     * Raised when the object has been completely received from the server.
+     */
+    onload: (this: HTMLIFrameElement, ev: Event) => any;
+    readonly sandbox: DOMSettableTokenList;
+    /**
+     * Sets or retrieves whether the frame can be scrolled.
+     */
+    scrolling: string;
+    /**
+     * Sets or retrieves a URL to be loaded by the object.
+     */
+    src: string;
+    /**
+     * Sets or retrieves the vertical margin for the object.
+     */
+    vspace: number;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: string;
+    addEventListener<K extends keyof HTMLIFrameElementEventMap>(type: K, listener: (this: HTMLIFrameElement, ev: HTMLIFrameElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLIFrameElement: {
+    prototype: HTMLIFrameElement;
+    new(): HTMLIFrameElement;
+};
+
+interface HTMLImageElement extends HTMLElement {
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    /**
+     * Sets or retrieves a text alternative to the graphic.
+     */
+    alt: string;
+    /**
+     * Specifies the properties of a border drawn around an object.
+     */
+    border: string;
+    /**
+     * Retrieves whether the object is fully loaded.
+     */
+    readonly complete: boolean;
+    crossOrigin: string | null;
+    readonly currentSrc: string;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: number;
+    /**
+     * Sets or retrieves the width of the border to draw around the object.
+     */
+    hspace: number;
+    /**
+     * Sets or retrieves whether the image is a server-side image map.
+     */
+    isMap: boolean;
+    /**
+     * Sets or retrieves a Uniform Resource Identifier (URI) to a long description of the object.
+     */
+    longDesc: string;
+    lowsrc: string;
+    /**
+     * Gets or sets whether the DLNA PlayTo device is available.
+     */
+    msPlayToDisabled: boolean;
+    msPlayToPreferredSourceUri: string;
+    /**
+     * Gets or sets the primary DLNA PlayTo device.
+     */
+    msPlayToPrimary: boolean;
+    /**
+     * Gets the source associated with the media element for use by the PlayToManager.
+     */
+    readonly msPlayToSource: any;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    /**
+     * The original height of the image resource before sizing.
+     */
+    readonly naturalHeight: number;
+    /**
+     * The original width of the image resource before sizing.
+     */
+    readonly naturalWidth: number;
+    sizes: string;
+    /**
+     * The address or URL of the a media resource that is to be considered.
+     */
+    src: string;
+    srcset: string;
+    /**
+     * Sets or retrieves the URL, often with a bookmark extension (#name), to use as a client-side image map.
+     */
+    useMap: string;
+    /**
+     * Sets or retrieves the vertical margin for the object.
+     */
+    vspace: number;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: number;
+    readonly x: number;
+    readonly y: number;
+    msGetAsCastingSource(): any;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLImageElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLImageElement: {
+    prototype: HTMLImageElement;
+    new(): HTMLImageElement;
+};
+
+interface HTMLInputElement extends HTMLElement {
+    /**
+     * Sets or retrieves a comma-separated list of content types.
+     */
+    accept: string;
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    /**
+     * Sets or retrieves a text alternative to the graphic.
+     */
+    alt: string;
+    /**
+     * Specifies whether autocomplete is applied to an editable text field.
+     */
+    autocomplete: string;
+    /**
+     * Provides a way to direct a user to a specific field when a document loads. This can provide both direction and convenience for a user, reducing the need to click or tab to a field when a page opens. This attribute is true when present on an element, and false when missing.
+     */
+    autofocus: boolean;
+    /**
+     * Sets or retrieves the width of the border to draw around the object.
+     */
+    border: string;
+    /**
+     * Sets or retrieves the state of the check box or radio button.
+     */
+    checked: boolean;
+    /**
+     * Retrieves whether the object is fully loaded.
+     */
+    readonly complete: boolean;
+    /**
+     * Sets or retrieves the state of the check box or radio button.
+     */
+    defaultChecked: boolean;
+    /**
+     * Sets or retrieves the initial contents of the object.
+     */
+    defaultValue: string;
+    disabled: boolean;
+    /**
+     * Returns a FileList object on a file type input object.
+     */
+    readonly files: FileList | null;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Overrides the action attribute (where the data on a form is sent) on the parent form element.
+     */
+    formAction: string;
+    /**
+     * Used to override the encoding (formEnctype attribute) specified on the form element.
+     */
+    formEnctype: string;
+    /**
+     * Overrides the submit method attribute previously specified on a form element.
+     */
+    formMethod: string;
+    /**
+     * Overrides any validation or required attributes on a form or form elements to allow it to be submitted without validation. This can be used to create a "save draft"-type submit option.
+     */
+    formNoValidate: string;
+    /**
+     * Overrides the target attribute on a form element.
+     */
+    formTarget: string;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: string;
+    /**
+     * Sets or retrieves the width of the border to draw around the object.
+     */
+    hspace: number;
+    indeterminate: boolean;
+    /**
+     * Specifies the ID of a pre-defined datalist of options for an input element.
+     */
+    readonly list: HTMLElement;
+    /**
+     * Defines the maximum acceptable value for an input element with type="number".When used with the min and step attributes, lets you control the range and increment (such as only even numbers) that the user can enter into an input field.
+     */
+    max: string;
+    /**
+     * Sets or retrieves the maximum number of characters that the user can enter in a text control.
+     */
+    maxLength: number;
+    /**
+     * Defines the minimum acceptable value for an input element with type="number". When used with the max and step attributes, lets you control the range and increment (such as even numbers only) that the user can enter into an input field.
+     */
+    min: string;
+    /**
+     * Sets or retrieves the Boolean value indicating whether multiple items can be selected from a list.
+     */
+    multiple: boolean;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    /**
+     * Gets or sets a string containing a regular expression that the user's input must match.
+     */
+    pattern: string;
+    /**
+     * Gets or sets a text string that is displayed in an input field as a hint or prompt to users as the format or type of information they need to enter.The text appears in an input field until the user puts focus on the field.
+     */
+    placeholder: string;
+    readOnly: boolean;
+    /**
+     * When present, marks an element that can't be submitted without a value.
+     */
+    required: boolean;
+    selectionDirection: string;
+    /**
+     * Gets or sets the end position or offset of a text selection.
+     */
+    selectionEnd: number;
+    /**
+     * Gets or sets the starting position or offset of a text selection.
+     */
+    selectionStart: number;
+    size: number;
+    /**
+     * The address or URL of the a media resource that is to be considered.
+     */
+    src: string;
+    status: boolean;
+    /**
+     * Defines an increment or jump between values that you want to allow the user to enter. When used with the max and min attributes, lets you control the range and increment (for example, allow only even numbers) that the user can enter into an input field.
+     */
+    step: string;
+    /**
+     * Returns the content type of the object.
+     */
+    type: string;
+    /**
+     * Sets or retrieves the URL, often with a bookmark extension (#name), to use as a client-side image map.
+     */
+    useMap: string;
+    /**
+     * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
+     */
+    readonly validationMessage: string;
+    /**
+     * Returns a  ValidityState object that represents the validity states of an element.
+     */
+    readonly validity: ValidityState;
+    /**
+     * Returns the value of the data at the cursor's current position.
+     */
+    value: string;
+    valueAsDate: Date;
+    /**
+     * Returns the input field value as a number.
+     */
+    valueAsNumber: number;
+    /**
+     * Sets or retrieves the vertical margin for the object.
+     */
+    vspace: number;
+    webkitdirectory: boolean;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: string;
+    /**
+     * Returns whether an element will successfully validate based on forms validation rules and constraints.
+     */
+    readonly willValidate: boolean;
+    minLength: number;
+    /**
+     * Returns whether a form will validate when it is submitted, without having to submit it.
+     */
+    checkValidity(): boolean;
+    /**
+     * Makes the selection equal to the current object.
+     */
+    select(): void;
+    /**
+     * Sets a custom error message that is displayed when a form is submitted.
+     * @param error Sets a custom error message that is displayed when a form is submitted.
+     */
+    setCustomValidity(error: string): void;
+    /**
+     * Sets the start and end positions of a selection in a text field.
+     * @param start The offset into the text field for the start of the selection.
+     * @param end The offset into the text field for the end of the selection.
+     */
+    setSelectionRange(start?: number, end?: number, direction?: string): void;
+    /**
+     * Decrements a range input control's value by the value given by the Step attribute. If the optional parameter is used, it will decrement the input control's step value multiplied by the parameter's value.
+     * @param n Value to decrement the value by.
+     */
+    stepDown(n?: number): void;
+    /**
+     * Increments a range input control's value by the value given by the Step attribute. If the optional parameter is used, will increment the input control's value by that value.
+     * @param n Value to increment the value by.
+     */
+    stepUp(n?: number): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLInputElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLInputElement: {
+    prototype: HTMLInputElement;
+    new(): HTMLInputElement;
+};
+
+interface HTMLLabelElement extends HTMLElement {
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Sets or retrieves the object to which the given label object is assigned.
+     */
+    htmlFor: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLLabelElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLLabelElement: {
+    prototype: HTMLLabelElement;
+    new(): HTMLLabelElement;
+};
+
+interface HTMLLegendElement extends HTMLElement {
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    align: string;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLLegendElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLLegendElement: {
+    prototype: HTMLLegendElement;
+    new(): HTMLLegendElement;
+};
+
+interface HTMLLIElement extends HTMLElement {
+    type: string;
+    /**
+     * Sets or retrieves the value of a list item.
+     */
+    value: number;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLLIElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLLIElement: {
+    prototype: HTMLLIElement;
+    new(): HTMLLIElement;
+};
+
+interface HTMLLinkElement extends HTMLElement, LinkStyle {
+    /**
+     * Sets or retrieves the character set used to encode the object.
+     */
+    charset: string;
+    disabled: boolean;
+    /**
+     * Sets or retrieves a destination URL or an anchor point.
+     */
+    href: string;
+    /**
+     * Sets or retrieves the language code of the object.
+     */
+    hreflang: string;
+    /**
+     * Sets or retrieves the media type.
+     */
+    media: string;
+    /**
+     * Sets or retrieves the relationship between the object and the destination of the link.
+     */
+    rel: string;
+    /**
+     * Sets or retrieves the relationship between the object and the destination of the link.
+     */
+    rev: string;
+    /**
+     * Sets or retrieves the window or frame at which to target content.
+     */
+    target: string;
+    /**
+     * Sets or retrieves the MIME type of the object.
+     */
+    type: string;
+    import?: Document;
+    integrity: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLLinkElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLLinkElement: {
+    prototype: HTMLLinkElement;
+    new(): HTMLLinkElement;
+};
+
+interface HTMLMapElement extends HTMLElement {
+    /**
+     * Retrieves a collection of the area objects defined for the given map object.
+     */
+    readonly areas: HTMLAreasCollection;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLMapElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLMapElement: {
+    prototype: HTMLMapElement;
+    new(): HTMLMapElement;
+};
+
+interface HTMLMarqueeElementEventMap extends HTMLElementEventMap {
+    "bounce": Event;
+    "finish": Event;
+    "start": Event;
+}
+
+interface HTMLMarqueeElement extends HTMLElement {
+    behavior: string;
+    bgColor: any;
+    direction: string;
+    height: string;
+    hspace: number;
+    loop: number;
+    onbounce: (this: HTMLMarqueeElement, ev: Event) => any;
+    onfinish: (this: HTMLMarqueeElement, ev: Event) => any;
+    onstart: (this: HTMLMarqueeElement, ev: Event) => any;
+    scrollAmount: number;
+    scrollDelay: number;
+    trueSpeed: boolean;
+    vspace: number;
+    width: string;
+    start(): void;
+    stop(): void;
+    addEventListener<K extends keyof HTMLMarqueeElementEventMap>(type: K, listener: (this: HTMLMarqueeElement, ev: HTMLMarqueeElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLMarqueeElement: {
+    prototype: HTMLMarqueeElement;
+    new(): HTMLMarqueeElement;
+};
+
+interface HTMLMediaElementEventMap extends HTMLElementEventMap {
+    "encrypted": MediaEncryptedEvent;
+    "msneedkey": MSMediaKeyNeededEvent;
+}
+
+interface HTMLMediaElement extends HTMLElement {
+    /**
+     * Returns an AudioTrackList object with the audio tracks for a given video element.
+     */
+    readonly audioTracks: AudioTrackList;
+    /**
+     * Gets or sets a value that indicates whether to start playing the media automatically.
+     */
+    autoplay: boolean;
+    /**
+     * Gets a collection of buffered time ranges.
+     */
+    readonly buffered: TimeRanges;
+    /**
+     * Gets or sets a flag that indicates whether the client provides a set of controls for the media (in case the developer does not include controls for the player).
+     */
+    controls: boolean;
+    crossOrigin: string | null;
+    /**
+     * Gets the address or URL of the current media resource that is selected by IHTMLMediaElement.
+     */
+    readonly currentSrc: string;
+    /**
+     * Gets or sets the current playback position, in seconds.
+     */
+    currentTime: number;
+    defaultMuted: boolean;
+    /**
+     * Gets or sets the default playback rate when the user is not using fast forward or reverse for a video or audio resource.
+     */
+    defaultPlaybackRate: number;
+    /**
+     * Returns the duration in seconds of the current media resource. A NaN value is returned if duration is not available, or Infinity if the media resource is streaming.
+     */
+    readonly duration: number;
+    /**
+     * Gets information about whether the playback has ended or not.
+     */
+    readonly ended: boolean;
+    /**
+     * Returns an object representing the current error state of the audio or video element.
+     */
+    readonly error: MediaError;
+    /**
+     * Gets or sets a flag to specify whether playback should restart after it completes.
+     */
+    loop: boolean;
+    readonly mediaKeys: MediaKeys | null;
+    /**
+     * Specifies the purpose of the audio or video media, such as background audio or alerts.
+     */
+    msAudioCategory: string;
+    /**
+     * Specifies the output device id that the audio will be sent to.
+     */
+    msAudioDeviceType: string;
+    readonly msGraphicsTrustStatus: MSGraphicsTrust;
+    /**
+     * Gets the MSMediaKeys object, which is used for decrypting media data, that is associated with this media element.
+     */
+    readonly msKeys: MSMediaKeys;
+    /**
+     * Gets or sets whether the DLNA PlayTo device is available.
+     */
+    msPlayToDisabled: boolean;
+    /**
+     * Gets or sets the path to the preferred media source. This enables the Play To target device to stream the media content, which can be DRM protected, from a different location, such as a cloud media server.
+     */
+    msPlayToPreferredSourceUri: string;
+    /**
+     * Gets or sets the primary DLNA PlayTo device.
+     */
+    msPlayToPrimary: boolean;
+    /**
+     * Gets the source associated with the media element for use by the PlayToManager.
+     */
+    readonly msPlayToSource: any;
+    /**
+     * Specifies whether or not to enable low-latency playback on the media element.
+     */
+    msRealTime: boolean;
+    /**
+     * Gets or sets a flag that indicates whether the audio (either audio or the audio track on video media) is muted.
+     */
+    muted: boolean;
+    /**
+     * Gets the current network activity for the element.
+     */
+    readonly networkState: number;
+    onencrypted: (this: HTMLMediaElement, ev: MediaEncryptedEvent) => any;
+    onmsneedkey: (this: HTMLMediaElement, ev: MSMediaKeyNeededEvent) => any;
+    /**
+     * Gets a flag that specifies whether playback is paused.
+     */
+    readonly paused: boolean;
+    /**
+     * Gets or sets the current rate of speed for the media resource to play. This speed is expressed as a multiple of the normal speed of the media resource.
+     */
+    playbackRate: number;
+    /**
+     * Gets TimeRanges for the current media resource that has been played.
+     */
+    readonly played: TimeRanges;
+    /**
+     * Gets or sets the current playback position, in seconds.
+     */
+    preload: string;
+    readyState: number;
+    /**
+     * Returns a TimeRanges object that represents the ranges of the current media resource that can be seeked.
+     */
+    readonly seekable: TimeRanges;
+    /**
+     * Gets a flag that indicates whether the the client is currently moving to a new playback position in the media resource.
+     */
+    readonly seeking: boolean;
+    /**
+     * The address or URL of the a media resource that is to be considered.
+     */
+    src: string;
+    srcObject: MediaStream | null;
+    readonly textTracks: TextTrackList;
+    readonly videoTracks: VideoTrackList;
+    /**
+     * Gets or sets the volume level for audio portions of the media element.
+     */
+    volume: number;
+    addTextTrack(kind: string, label?: string, language?: string): TextTrack;
+    /**
+     * Returns a string that specifies whether the client can play a given media resource type.
+     */
+    canPlayType(type: string): string;
+    /**
+     * Resets the audio or video object and loads a new media resource.
+     */
+    load(): void;
+    /**
+     * Clears all effects from the media pipeline.
+     */
+    msClearEffects(): void;
+    msGetAsCastingSource(): any;
+    /**
+     * Inserts the specified audio effect into media pipeline.
+     */
+    msInsertAudioEffect(activatableClassId: string, effectRequired: boolean, config?: any): void;
+    msSetMediaKeys(mediaKeys: MSMediaKeys): void;
+    /**
+     * Specifies the media protection manager for a given media pipeline.
+     */
+    msSetMediaProtectionManager(mediaProtectionManager?: any): void;
+    /**
+     * Pauses the current playback and sets paused to TRUE. This can be used to test whether the media is playing or paused. You can also use the pause or play events to tell whether the media is playing or not.
+     */
+    pause(): void;
+    /**
+     * Loads and starts playback of a media resource.
+     */
+    play(): Promise<void>;
+    setMediaKeys(mediaKeys: MediaKeys | null): Promise<void>;
+    readonly HAVE_CURRENT_DATA: number;
+    readonly HAVE_ENOUGH_DATA: number;
+    readonly HAVE_FUTURE_DATA: number;
+    readonly HAVE_METADATA: number;
+    readonly HAVE_NOTHING: number;
+    readonly NETWORK_EMPTY: number;
+    readonly NETWORK_IDLE: number;
+    readonly NETWORK_LOADING: number;
+    readonly NETWORK_NO_SOURCE: number;
+    addEventListener<K extends keyof HTMLMediaElementEventMap>(type: K, listener: (this: HTMLMediaElement, ev: HTMLMediaElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLMediaElement: {
+    prototype: HTMLMediaElement;
+    new(): HTMLMediaElement;
+    readonly HAVE_CURRENT_DATA: number;
+    readonly HAVE_ENOUGH_DATA: number;
+    readonly HAVE_FUTURE_DATA: number;
+    readonly HAVE_METADATA: number;
+    readonly HAVE_NOTHING: number;
+    readonly NETWORK_EMPTY: number;
+    readonly NETWORK_IDLE: number;
+    readonly NETWORK_LOADING: number;
+    readonly NETWORK_NO_SOURCE: number;
+};
+
+interface HTMLMenuElement extends HTMLElement {
+    compact: boolean;
+    type: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLMenuElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLMenuElement: {
+    prototype: HTMLMenuElement;
+    new(): HTMLMenuElement;
+};
+
+interface HTMLMetaElement extends HTMLElement {
+    /**
+     * Sets or retrieves the character set used to encode the object.
+     */
+    charset: string;
+    /**
+     * Gets or sets meta-information to associate with httpEquiv or name.
+     */
+    content: string;
+    /**
+     * Gets or sets information used to bind the value of a content attribute of a meta element to an HTTP response header.
+     */
+    httpEquiv: string;
+    /**
+     * Sets or retrieves the value specified in the content attribute of the meta object.
+     */
+    name: string;
+    /**
+     * Sets or retrieves a scheme to be used in interpreting the value of a property specified for the object.
+     */
+    scheme: string;
+    /**
+     * Sets or retrieves the URL property that will be loaded after the specified time has elapsed.
+     */
+    url: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLMetaElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLMetaElement: {
+    prototype: HTMLMetaElement;
+    new(): HTMLMetaElement;
+};
+
+interface HTMLMeterElement extends HTMLElement {
+    high: number;
+    low: number;
+    max: number;
+    min: number;
+    optimum: number;
+    value: number;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLMeterElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLMeterElement: {
+    prototype: HTMLMeterElement;
+    new(): HTMLMeterElement;
+};
+
+interface HTMLModElement extends HTMLElement {
+    /**
+     * Sets or retrieves reference information about the object.
+     */
+    cite: string;
+    /**
+     * Sets or retrieves the date and time of a modification to the object.
+     */
+    dateTime: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLModElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLModElement: {
+    prototype: HTMLModElement;
+    new(): HTMLModElement;
+};
+
+interface HTMLObjectElement extends HTMLElement, GetSVGDocument {
+    align: string;
+    /**
+     * Sets or retrieves a text alternative to the graphic.
+     */
+    alt: string;
+    /**
+     * Gets or sets the optional alternative HTML script to execute if the object fails to load.
+     */
+    altHtml: string;
+    /**
+     * Sets or retrieves a character string that can be used to implement your own archive functionality for the object.
+     */
+    archive: string;
+    /**
+     * Retrieves a string of the URL where the object tag can be found. This is often the href of the document that the object is in, or the value set by a base element.
+     */
+    readonly BaseHref: string;
+    border: string;
+    /**
+     * Sets or retrieves the URL of the file containing the compiled Java class.
+     */
+    code: string;
+    /**
+     * Sets or retrieves the URL of the component.
+     */
+    codeBase: string;
+    /**
+     * Sets or retrieves the Internet media type for the code associated with the object.
+     */
+    codeType: string;
+    /**
+     * Retrieves the document object of the page or frame.
+     */
+    readonly contentDocument: Document;
+    /**
+     * Sets or retrieves the URL that references the data of the object.
+     */
+    data: string;
+    declare: boolean;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: string;
+    hspace: number;
+    /**
+     * Gets or sets whether the DLNA PlayTo device is available.
+     */
+    msPlayToDisabled: boolean;
+    /**
+     * Gets or sets the path to the preferred media source. This enables the Play To target device to stream the media content, which can be DRM protected, from a different location, such as a cloud media server.
+     */
+    msPlayToPreferredSourceUri: string;
+    /**
+     * Gets or sets the primary DLNA PlayTo device.
+     */
+    msPlayToPrimary: boolean;
+    /**
+     * Gets the source associated with the media element for use by the PlayToManager.
+     */
+    readonly msPlayToSource: any;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    readonly readyState: number;
+    /**
+     * Sets or retrieves a message to be displayed while an object is loading.
+     */
+    standby: string;
+    /**
+     * Sets or retrieves the MIME type of the object.
+     */
+    type: string;
+    /**
+     * Sets or retrieves the URL, often with a bookmark extension (#name), to use as a client-side image map.
+     */
+    useMap: string;
+    /**
+     * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
+     */
+    readonly validationMessage: string;
+    /**
+     * Returns a  ValidityState object that represents the validity states of an element.
+     */
+    readonly validity: ValidityState;
+    vspace: number;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: string;
+    /**
+     * Returns whether an element will successfully validate based on forms validation rules and constraints.
+     */
+    readonly willValidate: boolean;
+    /**
+     * Returns whether a form will validate when it is submitted, without having to submit it.
+     */
+    checkValidity(): boolean;
+    /**
+     * Sets a custom error message that is displayed when a form is submitted.
+     * @param error Sets a custom error message that is displayed when a form is submitted.
+     */
+    setCustomValidity(error: string): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLObjectElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLObjectElement: {
+    prototype: HTMLObjectElement;
+    new(): HTMLObjectElement;
+};
+
+interface HTMLOListElement extends HTMLElement {
+    compact: boolean;
+    /**
+     * The starting number.
+     */
+    start: number;
+    type: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLOListElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLOListElement: {
+    prototype: HTMLOListElement;
+    new(): HTMLOListElement;
+};
+
+interface HTMLOptGroupElement extends HTMLElement {
+    /**
+     * Sets or retrieves the status of an option.
+     */
+    defaultSelected: boolean;
+    disabled: boolean;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Sets or retrieves the ordinal position of an option in a list box.
+     */
+    readonly index: number;
+    /**
+     * Sets or retrieves a value that you can use to implement your own label functionality for the object.
+     */
+    label: string;
+    /**
+     * Sets or retrieves whether the option in the list box is the default item.
+     */
+    selected: boolean;
+    /**
+     * Sets or retrieves the text string specified by the option tag.
+     */
+    readonly text: string;
+    /**
+     * Sets or retrieves the value which is returned to the server when the form control is submitted.
+     */
+    value: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLOptGroupElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLOptGroupElement: {
+    prototype: HTMLOptGroupElement;
+    new(): HTMLOptGroupElement;
+};
+
+interface HTMLOptionElement extends HTMLElement {
+    /**
+     * Sets or retrieves the status of an option.
+     */
+    defaultSelected: boolean;
+    disabled: boolean;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Sets or retrieves the ordinal position of an option in a list box.
+     */
+    readonly index: number;
+    /**
+     * Sets or retrieves a value that you can use to implement your own label functionality for the object.
+     */
+    label: string;
+    /**
+     * Sets or retrieves whether the option in the list box is the default item.
+     */
+    selected: boolean;
+    /**
+     * Sets or retrieves the text string specified by the option tag.
+     */
+    text: string;
+    /**
+     * Sets or retrieves the value which is returned to the server when the form control is submitted.
+     */
+    value: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLOptionElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLOptionElement: {
+    prototype: HTMLOptionElement;
+    new(): HTMLOptionElement;
+};
+
+interface HTMLOptionsCollection extends HTMLCollectionOf<HTMLOptionElement> {
+    length: number;
+    selectedIndex: number;
+    add(element: HTMLOptionElement | HTMLOptGroupElement, before?: HTMLElement | number): void;
+    remove(index: number): void;
+}
+
+declare var HTMLOptionsCollection: {
+    prototype: HTMLOptionsCollection;
+    new(): HTMLOptionsCollection;
+};
+
+interface HTMLOutputElement extends HTMLElement {
+    defaultValue: string;
+    readonly form: HTMLFormElement;
+    readonly htmlFor: DOMSettableTokenList;
+    name: string;
+    readonly type: string;
+    readonly validationMessage: string;
+    readonly validity: ValidityState;
+    value: string;
+    readonly willValidate: boolean;
+    checkValidity(): boolean;
+    reportValidity(): boolean;
+    setCustomValidity(error: string): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLOutputElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLOutputElement: {
+    prototype: HTMLOutputElement;
+    new(): HTMLOutputElement;
+};
+
+interface HTMLParagraphElement extends HTMLElement {
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    clear: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLParagraphElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLParagraphElement: {
+    prototype: HTMLParagraphElement;
+    new(): HTMLParagraphElement;
+};
+
+interface HTMLParamElement extends HTMLElement {
+    /**
+     * Sets or retrieves the name of an input parameter for an element.
+     */
+    name: string;
+    /**
+     * Sets or retrieves the content type of the resource designated by the value attribute.
+     */
+    type: string;
+    /**
+     * Sets or retrieves the value of an input parameter for an element.
+     */
+    value: string;
+    /**
+     * Sets or retrieves the data type of the value attribute.
+     */
+    valueType: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLParamElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLParamElement: {
+    prototype: HTMLParamElement;
+    new(): HTMLParamElement;
+};
+
+interface HTMLPictureElement extends HTMLElement {
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLPictureElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLPictureElement: {
+    prototype: HTMLPictureElement;
+    new(): HTMLPictureElement;
+};
+
+interface HTMLPreElement extends HTMLElement {
+    /**
+     * Sets or gets a value that you can use to implement your own width functionality for the object.
+     */
+    width: number;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLPreElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLPreElement: {
+    prototype: HTMLPreElement;
+    new(): HTMLPreElement;
+};
+
+interface HTMLProgressElement extends HTMLElement {
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Defines the maximum, or "done" value for a progress element.
+     */
+    max: number;
+    /**
+     * Returns the quotient of value/max when the value attribute is set (determinate progress bar), or -1 when the value attribute is missing (indeterminate progress bar).
+     */
+    readonly position: number;
+    /**
+     * Sets or gets the current value of a progress element. The value must be a non-negative number between 0 and the max value.
+     */
+    value: number;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLProgressElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLProgressElement: {
+    prototype: HTMLProgressElement;
+    new(): HTMLProgressElement;
+};
+
+interface HTMLQuoteElement extends HTMLElement {
+    /**
+     * Sets or retrieves reference information about the object.
+     */
+    cite: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLQuoteElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLQuoteElement: {
+    prototype: HTMLQuoteElement;
+    new(): HTMLQuoteElement;
+};
+
+interface HTMLScriptElement extends HTMLElement {
+    async: boolean;
+    /**
+     * Sets or retrieves the character set used to encode the object.
+     */
+    charset: string;
+    crossOrigin: string | null;
+    /**
+     * Sets or retrieves the status of the script.
+     */
+    defer: boolean;
+    /**
+     * Sets or retrieves the event for which the script is written.
+     */
+    event: string;
+    /**
+     * Sets or retrieves the object that is bound to the event script.
+     */
+    htmlFor: string;
+    /**
+     * Retrieves the URL to an external file that contains the source code or data.
+     */
+    src: string;
+    /**
+     * Retrieves or sets the text of the object as a string.
+     */
+    text: string;
+    /**
+     * Sets or retrieves the MIME type for the associated scripting engine.
+     */
+    type: string;
+    integrity: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLScriptElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLScriptElement: {
+    prototype: HTMLScriptElement;
+    new(): HTMLScriptElement;
+};
+
+interface HTMLSelectElement extends HTMLElement {
+    /**
+     * Provides a way to direct a user to a specific field when a document loads. This can provide both direction and convenience for a user, reducing the need to click or tab to a field when a page opens. This attribute is true when present on an element, and false when missing.
+     */
+    autofocus: boolean;
+    disabled: boolean;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Sets or retrieves the number of objects in a collection.
+     */
+    length: number;
+    /**
+     * Sets or retrieves the Boolean value indicating whether multiple items can be selected from a list.
+     */
+    multiple: boolean;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    readonly options: HTMLOptionsCollection;
+    /**
+     * When present, marks an element that can't be submitted without a value.
+     */
+    required: boolean;
+    /**
+     * Sets or retrieves the index of the selected option in a select object.
+     */
+    selectedIndex: number;
+    selectedOptions: HTMLCollectionOf<HTMLOptionElement>;
+    /**
+     * Sets or retrieves the number of rows in the list box.
+     */
+    size: number;
+    /**
+     * Retrieves the type of select control based on the value of the MULTIPLE attribute.
+     */
+    readonly type: string;
+    /**
+     * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
+     */
+    readonly validationMessage: string;
+    /**
+     * Returns a  ValidityState object that represents the validity states of an element.
+     */
+    readonly validity: ValidityState;
+    /**
+     * Sets or retrieves the value which is returned to the server when the form control is submitted.
+     */
+    value: string;
+    /**
+     * Returns whether an element will successfully validate based on forms validation rules and constraints.
+     */
+    readonly willValidate: boolean;
+    /**
+     * Adds an element to the areas, controlRange, or options collection.
+     * @param element Variant of type Number that specifies the index position in the collection where the element is placed. If no value is given, the method places the element at the end of the collection.
+     * @param before Variant of type Object that specifies an element to insert before, or null to append the object to the collection.
+     */
+    add(element: HTMLElement, before?: HTMLElement | number): void;
+    /**
+     * Returns whether a form will validate when it is submitted, without having to submit it.
+     */
+    checkValidity(): boolean;
+    /**
+     * Retrieves a select object or an object from an options collection.
+     * @param name Variant of type Number or String that specifies the object or collection to retrieve. If this parameter is an integer, it is the zero-based index of the object. If this parameter is a string, all objects with matching name or id properties are retrieved, and a collection is returned if more than one match is made.
+     * @param index Variant of type Number that specifies the zero-based index of the object to retrieve when a collection is returned.
+     */
+    item(name?: any, index?: any): any;
+    /**
+     * Retrieves a select object or an object from an options collection.
+     * @param namedItem A String that specifies the name or id property of the object to retrieve. A collection is returned if more than one match is made.
+     */
+    namedItem(name: string): any;
+    /**
+     * Removes an element from the collection.
+     * @param index Number that specifies the zero-based index of the element to remove from the collection.
+     */
+    remove(index?: number): void;
+    /**
+     * Sets a custom error message that is displayed when a form is submitted.
+     * @param error Sets a custom error message that is displayed when a form is submitted.
+     */
+    setCustomValidity(error: string): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLSelectElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+    [name: string]: any;
+}
+
+declare var HTMLSelectElement: {
+    prototype: HTMLSelectElement;
+    new(): HTMLSelectElement;
+};
+
+interface HTMLSourceElement extends HTMLElement {
+    /**
+     * Gets or sets the intended media type of the media source.
+     */
+    media: string;
+    msKeySystem: string;
+    sizes: string;
+    /**
+     * The address or URL of the a media resource that is to be considered.
+     */
+    src: string;
+    srcset: string;
+    /**
+     * Gets or sets the MIME type of a media resource.
+     */
+    type: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLSourceElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLSourceElement: {
+    prototype: HTMLSourceElement;
+    new(): HTMLSourceElement;
+};
+
+interface HTMLSpanElement extends HTMLElement {
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLSpanElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLSpanElement: {
+    prototype: HTMLSpanElement;
+    new(): HTMLSpanElement;
+};
+
+interface HTMLStyleElement extends HTMLElement, LinkStyle {
+    disabled: boolean;
+    /**
+     * Sets or retrieves the media type.
+     */
+    media: string;
+    /**
+     * Retrieves the CSS language in which the style sheet is written.
+     */
+    type: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLStyleElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLStyleElement: {
+    prototype: HTMLStyleElement;
+    new(): HTMLStyleElement;
+};
+
+interface HTMLTableCaptionElement extends HTMLElement {
+    /**
+     * Sets or retrieves the alignment of the caption or legend.
+     */
+    align: string;
+    /**
+     * Sets or retrieves whether the caption appears at the top or bottom of the table.
+     */
+    vAlign: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTableCaptionElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTableCaptionElement: {
+    prototype: HTMLTableCaptionElement;
+    new(): HTMLTableCaptionElement;
+};
+
+interface HTMLTableCellElement extends HTMLElement, HTMLTableAlignment {
+    /**
+     * Sets or retrieves abbreviated text for the object.
+     */
+    abbr: string;
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    /**
+     * Sets or retrieves a comma-delimited list of conceptual categories associated with the object.
+     */
+    axis: string;
+    bgColor: any;
+    /**
+     * Retrieves the position of the object in the cells collection of a row.
+     */
+    readonly cellIndex: number;
+    /**
+     * Sets or retrieves the number columns in the table that the object should span.
+     */
+    colSpan: number;
+    /**
+     * Sets or retrieves a list of header cells that provide information for the object.
+     */
+    headers: string;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: any;
+    /**
+     * Sets or retrieves whether the browser automatically performs wordwrap.
+     */
+    noWrap: boolean;
+    /**
+     * Sets or retrieves how many rows in a table the cell should span.
+     */
+    rowSpan: number;
+    /**
+     * Sets or retrieves the group of cells in a table to which the object's information applies.
+     */
+    scope: string;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTableCellElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTableCellElement: {
+    prototype: HTMLTableCellElement;
+    new(): HTMLTableCellElement;
+};
+
+interface HTMLTableColElement extends HTMLElement, HTMLTableAlignment {
+    /**
+     * Sets or retrieves the alignment of the object relative to the display or table.
+     */
+    align: string;
+    /**
+     * Sets or retrieves the number of columns in the group.
+     */
+    span: number;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: any;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTableColElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTableColElement: {
+    prototype: HTMLTableColElement;
+    new(): HTMLTableColElement;
+};
+
+interface HTMLTableDataCellElement extends HTMLTableCellElement {
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTableDataCellElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTableDataCellElement: {
+    prototype: HTMLTableDataCellElement;
+    new(): HTMLTableDataCellElement;
+};
+
+interface HTMLTableElement extends HTMLElement {
+    /**
+     * Sets or retrieves a value that indicates the table alignment.
+     */
+    align: string;
+    bgColor: any;
+    /**
+     * Sets or retrieves the width of the border to draw around the object.
+     */
+    border: string;
+    /**
+     * Sets or retrieves the border color of the object.
+     */
+    borderColor: any;
+    /**
+     * Retrieves the caption object of a table.
+     */
+    caption: HTMLTableCaptionElement;
+    /**
+     * Sets or retrieves the amount of space between the border of the cell and the content of the cell.
+     */
+    cellPadding: string;
+    /**
+     * Sets or retrieves the amount of space between cells in a table.
+     */
+    cellSpacing: string;
+    /**
+     * Sets or retrieves the number of columns in the table.
+     */
+    cols: number;
+    /**
+     * Sets or retrieves the way the border frame around the table is displayed.
+     */
+    frame: string;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: any;
+    /**
+     * Sets or retrieves the number of horizontal rows contained in the object.
+     */
+    rows: HTMLCollectionOf<HTMLTableRowElement>;
+    /**
+     * Sets or retrieves which dividing lines (inner borders) are displayed.
+     */
+    rules: string;
+    /**
+     * Sets or retrieves a description and/or structure of the object.
+     */
+    summary: string;
+    /**
+     * Retrieves a collection of all tBody objects in the table. Objects in this collection are in source order.
+     */
+    tBodies: HTMLCollectionOf<HTMLTableSectionElement>;
+    /**
+     * Retrieves the tFoot object of the table.
+     */
+    tFoot: HTMLTableSectionElement;
+    /**
+     * Retrieves the tHead object of the table.
+     */
+    tHead: HTMLTableSectionElement;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: string;
+    /**
+     * Creates an empty caption element in the table.
+     */
+    createCaption(): HTMLTableCaptionElement;
+    /**
+     * Creates an empty tBody element in the table.
+     */
+    createTBody(): HTMLTableSectionElement;
+    /**
+     * Creates an empty tFoot element in the table.
+     */
+    createTFoot(): HTMLTableSectionElement;
+    /**
+     * Returns the tHead element object if successful, or null otherwise.
+     */
+    createTHead(): HTMLTableSectionElement;
+    /**
+     * Deletes the caption element and its contents from the table.
+     */
+    deleteCaption(): void;
+    /**
+     * Removes the specified row (tr) from the element and from the rows collection.
+     * @param index Number that specifies the zero-based position in the rows collection of the row to remove.
+     */
+    deleteRow(index?: number): void;
+    /**
+     * Deletes the tFoot element and its contents from the table.
+     */
+    deleteTFoot(): void;
+    /**
+     * Deletes the tHead element and its contents from the table.
+     */
+    deleteTHead(): void;
+    /**
+     * Creates a new row (tr) in the table, and adds the row to the rows collection.
+     * @param index Number that specifies where to insert the row in the rows collection. The default value is -1, which appends the new row to the end of the rows collection.
+     */
+    insertRow(index?: number): HTMLTableRowElement;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTableElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTableElement: {
+    prototype: HTMLTableElement;
+    new(): HTMLTableElement;
+};
+
+interface HTMLTableHeaderCellElement extends HTMLTableCellElement {
+    /**
+     * Sets or retrieves the group of cells in a table to which the object's information applies.
+     */
+    scope: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTableHeaderCellElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTableHeaderCellElement: {
+    prototype: HTMLTableHeaderCellElement;
+    new(): HTMLTableHeaderCellElement;
+};
+
+interface HTMLTableRowElement extends HTMLElement, HTMLTableAlignment {
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    bgColor: any;
+    /**
+     * Retrieves a collection of all cells in the table row.
+     */
+    cells: HTMLCollectionOf<HTMLTableDataCellElement | HTMLTableHeaderCellElement>;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: any;
+    /**
+     * Retrieves the position of the object in the rows collection for the table.
+     */
+    readonly rowIndex: number;
+    /**
+     * Retrieves the position of the object in the collection.
+     */
+    readonly sectionRowIndex: number;
+    /**
+     * Removes the specified cell from the table row, as well as from the cells collection.
+     * @param index Number that specifies the zero-based position of the cell to remove from the table row. If no value is provided, the last cell in the cells collection is deleted.
+     */
+    deleteCell(index?: number): void;
+    /**
+     * Creates a new cell in the table row, and adds the cell to the cells collection.
+     * @param index Number that specifies where to insert the cell in the tr. The default value is -1, which appends the new cell to the end of the cells collection.
+     */
+    insertCell(index?: number): HTMLTableDataCellElement;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTableRowElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTableRowElement: {
+    prototype: HTMLTableRowElement;
+    new(): HTMLTableRowElement;
+};
+
+interface HTMLTableSectionElement extends HTMLElement, HTMLTableAlignment {
+    /**
+     * Sets or retrieves a value that indicates the table alignment.
+     */
+    align: string;
+    /**
+     * Sets or retrieves the number of horizontal rows contained in the object.
+     */
+    rows: HTMLCollectionOf<HTMLTableRowElement>;
+    /**
+     * Removes the specified row (tr) from the element and from the rows collection.
+     * @param index Number that specifies the zero-based position in the rows collection of the row to remove.
+     */
+    deleteRow(index?: number): void;
+    /**
+     * Creates a new row (tr) in the table, and adds the row to the rows collection.
+     * @param index Number that specifies where to insert the row in the rows collection. The default value is -1, which appends the new row to the end of the rows collection.
+     */
+    insertRow(index?: number): HTMLTableRowElement;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTableSectionElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTableSectionElement: {
+    prototype: HTMLTableSectionElement;
+    new(): HTMLTableSectionElement;
+};
+
+interface HTMLTemplateElement extends HTMLElement {
+    readonly content: DocumentFragment;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTemplateElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTemplateElement: {
+    prototype: HTMLTemplateElement;
+    new(): HTMLTemplateElement;
+};
+
+interface HTMLTextAreaElement extends HTMLElement {
+    /**
+     * Provides a way to direct a user to a specific field when a document loads. This can provide both direction and convenience for a user, reducing the need to click or tab to a field when a page opens. This attribute is true when present on an element, and false when missing.
+     */
+    autofocus: boolean;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    cols: number;
+    /**
+     * Sets or retrieves the initial contents of the object.
+     */
+    defaultValue: string;
+    disabled: boolean;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Sets or retrieves the maximum number of characters that the user can enter in a text control.
+     */
+    maxLength: number;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    /**
+     * Gets or sets a text string that is displayed in an input field as a hint or prompt to users as the format or type of information they need to enter.The text appears in an input field until the user puts focus on the field.
+     */
+    placeholder: string;
+    /**
+     * Sets or retrieves the value indicated whether the content of the object is read-only.
+     */
+    readOnly: boolean;
+    /**
+     * When present, marks an element that can't be submitted without a value.
+     */
+    required: boolean;
+    /**
+     * Sets or retrieves the number of horizontal rows contained in the object.
+     */
+    rows: number;
+    /**
+     * Gets or sets the end position or offset of a text selection.
+     */
+    selectionEnd: number;
+    /**
+     * Gets or sets the starting position or offset of a text selection.
+     */
+    selectionStart: number;
+    /**
+     * Sets or retrieves the value indicating whether the control is selected.
+     */
+    status: any;
+    /**
+     * Retrieves the type of control.
+     */
+    readonly type: string;
+    /**
+     * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
+     */
+    readonly validationMessage: string;
+    /**
+     * Returns a  ValidityState object that represents the validity states of an element.
+     */
+    readonly validity: ValidityState;
+    /**
+     * Retrieves or sets the text in the entry field of the textArea element.
+     */
+    value: string;
+    /**
+     * Returns whether an element will successfully validate based on forms validation rules and constraints.
+     */
+    readonly willValidate: boolean;
+    /**
+     * Sets or retrieves how to handle wordwrapping in the object.
+     */
+    wrap: string;
+    minLength: number;
+    /**
+     * Returns whether a form will validate when it is submitted, without having to submit it.
+     */
+    checkValidity(): boolean;
+    /**
+     * Highlights the input area of a form element.
+     */
+    select(): void;
+    /**
+     * Sets a custom error message that is displayed when a form is submitted.
+     * @param error Sets a custom error message that is displayed when a form is submitted.
+     */
+    setCustomValidity(error: string): void;
+    /**
+     * Sets the start and end positions of a selection in a text field.
+     * @param start The offset into the text field for the start of the selection.
+     * @param end The offset into the text field for the end of the selection.
+     */
+    setSelectionRange(start: number, end: number): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTextAreaElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTextAreaElement: {
+    prototype: HTMLTextAreaElement;
+    new(): HTMLTextAreaElement;
+};
+
+interface HTMLTimeElement extends HTMLElement {
+    dateTime: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTimeElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTimeElement: {
+    prototype: HTMLTimeElement;
+    new(): HTMLTimeElement;
+};
+
+interface HTMLTitleElement extends HTMLElement {
+    /**
+     * Retrieves or sets the text of the object as a string.
+     */
+    text: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTitleElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTitleElement: {
+    prototype: HTMLTitleElement;
+    new(): HTMLTitleElement;
+};
+
+interface HTMLTrackElement extends HTMLElement {
+    default: boolean;
+    kind: string;
+    label: string;
+    readonly readyState: number;
+    src: string;
+    srclang: string;
+    readonly track: TextTrack;
+    readonly ERROR: number;
+    readonly LOADED: number;
+    readonly LOADING: number;
+    readonly NONE: number;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTrackElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTrackElement: {
+    prototype: HTMLTrackElement;
+    new(): HTMLTrackElement;
+    readonly ERROR: number;
+    readonly LOADED: number;
+    readonly LOADING: number;
+    readonly NONE: number;
+};
+
+interface HTMLUListElement extends HTMLElement {
+    compact: boolean;
+    type: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLUListElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLUListElement: {
+    prototype: HTMLUListElement;
+    new(): HTMLUListElement;
+};
+
+interface HTMLUnknownElement extends HTMLElement {
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLUnknownElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLUnknownElement: {
+    prototype: HTMLUnknownElement;
+    new(): HTMLUnknownElement;
+};
+
+interface HTMLVideoElementEventMap extends HTMLMediaElementEventMap {
+    "MSVideoFormatChanged": Event;
+    "MSVideoFrameStepCompleted": Event;
+    "MSVideoOptimalLayoutChanged": Event;
+}
+
+interface HTMLVideoElement extends HTMLMediaElement {
+    /**
+     * Gets or sets the height of the video element.
+     */
+    height: number;
+    msHorizontalMirror: boolean;
+    readonly msIsLayoutOptimalForPlayback: boolean;
+    readonly msIsStereo3D: boolean;
+    msStereo3DPackingMode: string;
+    msStereo3DRenderMode: string;
+    msZoom: boolean;
+    onMSVideoFormatChanged: (this: HTMLVideoElement, ev: Event) => any;
+    onMSVideoFrameStepCompleted: (this: HTMLVideoElement, ev: Event) => any;
+    onMSVideoOptimalLayoutChanged: (this: HTMLVideoElement, ev: Event) => any;
+    /**
+     * Gets or sets a URL of an image to display, for example, like a movie poster. This can be a still frame from the video, or another image if no video data is available.
+     */
+    poster: string;
+    /**
+     * Gets the intrinsic height of a video in CSS pixels, or zero if the dimensions are not known.
+     */
+    readonly videoHeight: number;
+    /**
+     * Gets the intrinsic width of a video in CSS pixels, or zero if the dimensions are not known.
+     */
+    readonly videoWidth: number;
+    readonly webkitDisplayingFullscreen: boolean;
+    readonly webkitSupportsFullscreen: boolean;
+    /**
+     * Gets or sets the width of the video element.
+     */
+    width: number;
+    getVideoPlaybackQuality(): VideoPlaybackQuality;
+    msFrameStep(forward: boolean): void;
+    msInsertVideoEffect(activatableClassId: string, effectRequired: boolean, config?: any): void;
+    msSetVideoRectangle(left: number, top: number, right: number, bottom: number): void;
+    webkitEnterFullscreen(): void;
+    webkitEnterFullScreen(): void;
+    webkitExitFullscreen(): void;
+    webkitExitFullScreen(): void;
+    addEventListener<K extends keyof HTMLVideoElementEventMap>(type: K, listener: (this: HTMLVideoElement, ev: HTMLVideoElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLVideoElement: {
+    prototype: HTMLVideoElement;
+    new(): HTMLVideoElement;
+};
+
+interface IDBCursor {
+    readonly direction: IDBCursorDirection;
+    key: IDBKeyRange | IDBValidKey;
+    readonly primaryKey: any;
+    source: IDBObjectStore | IDBIndex;
+    advance(count: number): void;
+    continue(key?: IDBKeyRange | IDBValidKey): void;
+    delete(): IDBRequest;
+    update(value: any): IDBRequest;
+    readonly NEXT: string;
+    readonly NEXT_NO_DUPLICATE: string;
+    readonly PREV: string;
+    readonly PREV_NO_DUPLICATE: string;
+}
+
+declare var IDBCursor: {
+    prototype: IDBCursor;
+    new(): IDBCursor;
+    readonly NEXT: string;
+    readonly NEXT_NO_DUPLICATE: string;
+    readonly PREV: string;
+    readonly PREV_NO_DUPLICATE: string;
+};
+
+interface IDBCursorWithValue extends IDBCursor {
+    readonly value: any;
+}
+
+declare var IDBCursorWithValue: {
+    prototype: IDBCursorWithValue;
+    new(): IDBCursorWithValue;
+};
+
+interface IDBDatabaseEventMap {
+    "abort": Event;
+    "error": Event;
+}
+
+interface IDBDatabase extends EventTarget {
+    readonly name: string;
+    readonly objectStoreNames: DOMStringList;
+    onabort: (this: IDBDatabase, ev: Event) => any;
+    onerror: (this: IDBDatabase, ev: Event) => any;
+    version: number;
+    onversionchange: (ev: IDBVersionChangeEvent) => any;
+    close(): void;
+    createObjectStore(name: string, optionalParameters?: IDBObjectStoreParameters): IDBObjectStore;
+    deleteObjectStore(name: string): void;
+    transaction(storeNames: string | string[], mode?: IDBTransactionMode): IDBTransaction;
+    addEventListener(type: "versionchange", listener: (ev: IDBVersionChangeEvent) => any, useCapture?: boolean): void;
+    addEventListener<K extends keyof IDBDatabaseEventMap>(type: K, listener: (this: IDBDatabase, ev: IDBDatabaseEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var IDBDatabase: {
+    prototype: IDBDatabase;
+    new(): IDBDatabase;
+};
+
+interface IDBFactory {
+    cmp(first: any, second: any): number;
+    deleteDatabase(name: string): IDBOpenDBRequest;
+    open(name: string, version?: number): IDBOpenDBRequest;
+}
+
+declare var IDBFactory: {
+    prototype: IDBFactory;
+    new(): IDBFactory;
+};
+
+interface IDBIndex {
+    keyPath: string | string[];
+    readonly name: string;
+    readonly objectStore: IDBObjectStore;
+    readonly unique: boolean;
+    multiEntry: boolean;
+    count(key?: IDBKeyRange | IDBValidKey): IDBRequest;
+    get(key: IDBKeyRange | IDBValidKey): IDBRequest;
+    getKey(key: IDBKeyRange | IDBValidKey): IDBRequest;
+    openCursor(range?: IDBKeyRange | IDBValidKey, direction?: IDBCursorDirection): IDBRequest;
+    openKeyCursor(range?: IDBKeyRange | IDBValidKey, direction?: IDBCursorDirection): IDBRequest;
+}
+
+declare var IDBIndex: {
+    prototype: IDBIndex;
+    new(): IDBIndex;
+};
+
+interface IDBKeyRange {
+    readonly lower: any;
+    readonly lowerOpen: boolean;
+    readonly upper: any;
+    readonly upperOpen: boolean;
+}
+
+declare var IDBKeyRange: {
+    prototype: IDBKeyRange;
+    new(): IDBKeyRange;
+    bound(lower: any, upper: any, lowerOpen?: boolean, upperOpen?: boolean): IDBKeyRange;
+    lowerBound(lower: any, open?: boolean): IDBKeyRange;
+    only(value: any): IDBKeyRange;
+    upperBound(upper: any, open?: boolean): IDBKeyRange;
+};
+
+interface IDBObjectStore {
+    readonly indexNames: DOMStringList;
+    keyPath: string | string[];
+    readonly name: string;
+    readonly transaction: IDBTransaction;
+    autoIncrement: boolean;
+    add(value: any, key?: IDBKeyRange | IDBValidKey): IDBRequest;
+    clear(): IDBRequest;
+    count(key?: IDBKeyRange | IDBValidKey): IDBRequest;
+    createIndex(name: string, keyPath: string | string[], optionalParameters?: IDBIndexParameters): IDBIndex;
+    delete(key: IDBKeyRange | IDBValidKey): IDBRequest;
+    deleteIndex(indexName: string): void;
+    get(key: any): IDBRequest;
+    index(name: string): IDBIndex;
+    openCursor(range?: IDBKeyRange | IDBValidKey, direction?: IDBCursorDirection): IDBRequest;
+    put(value: any, key?: IDBKeyRange | IDBValidKey): IDBRequest;
+}
+
+declare var IDBObjectStore: {
+    prototype: IDBObjectStore;
+    new(): IDBObjectStore;
+};
+
+interface IDBOpenDBRequestEventMap extends IDBRequestEventMap {
+    "blocked": Event;
+    "upgradeneeded": IDBVersionChangeEvent;
+}
+
+interface IDBOpenDBRequest extends IDBRequest {
+    onblocked: (this: IDBOpenDBRequest, ev: Event) => any;
+    onupgradeneeded: (this: IDBOpenDBRequest, ev: IDBVersionChangeEvent) => any;
+    addEventListener<K extends keyof IDBOpenDBRequestEventMap>(type: K, listener: (this: IDBOpenDBRequest, ev: IDBOpenDBRequestEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var IDBOpenDBRequest: {
+    prototype: IDBOpenDBRequest;
+    new(): IDBOpenDBRequest;
+};
+
+interface IDBRequestEventMap {
+    "error": Event;
+    "success": Event;
+}
+
+interface IDBRequest extends EventTarget {
+    readonly error: DOMException;
+    onerror: (this: IDBRequest, ev: Event) => any;
+    onsuccess: (this: IDBRequest, ev: Event) => any;
+    readonly readyState: IDBRequestReadyState;
+    readonly result: any;
+    source: IDBObjectStore | IDBIndex | IDBCursor;
+    readonly transaction: IDBTransaction;
+    addEventListener<K extends keyof IDBRequestEventMap>(type: K, listener: (this: IDBRequest, ev: IDBRequestEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var IDBRequest: {
+    prototype: IDBRequest;
+    new(): IDBRequest;
+};
+
+interface IDBTransactionEventMap {
+    "abort": Event;
+    "complete": Event;
+    "error": Event;
+}
+
+interface IDBTransaction extends EventTarget {
+    readonly db: IDBDatabase;
+    readonly error: DOMException;
+    readonly mode: IDBTransactionMode;
+    onabort: (this: IDBTransaction, ev: Event) => any;
+    oncomplete: (this: IDBTransaction, ev: Event) => any;
+    onerror: (this: IDBTransaction, ev: Event) => any;
+    abort(): void;
+    objectStore(name: string): IDBObjectStore;
+    readonly READ_ONLY: string;
+    readonly READ_WRITE: string;
+    readonly VERSION_CHANGE: string;
+    addEventListener<K extends keyof IDBTransactionEventMap>(type: K, listener: (this: IDBTransaction, ev: IDBTransactionEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var IDBTransaction: {
+    prototype: IDBTransaction;
+    new(): IDBTransaction;
+    readonly READ_ONLY: string;
+    readonly READ_WRITE: string;
+    readonly VERSION_CHANGE: string;
+};
+
+interface IDBVersionChangeEvent extends Event {
+    readonly newVersion: number | null;
+    readonly oldVersion: number;
+}
+
+declare var IDBVersionChangeEvent: {
+    prototype: IDBVersionChangeEvent;
+    new(): IDBVersionChangeEvent;
+};
+
+interface IIRFilterNode extends AudioNode {
+    getFrequencyResponse(frequencyHz: Float32Array, magResponse: Float32Array, phaseResponse: Float32Array): void;
+}
+
+declare var IIRFilterNode: {
+    prototype: IIRFilterNode;
+    new(): IIRFilterNode;
+};
+
+interface ImageData {
+    data: Uint8ClampedArray;
+    readonly height: number;
+    readonly width: number;
+}
+
+declare var ImageData: {
+    prototype: ImageData;
+    new(width: number, height: number): ImageData;
+    new(array: Uint8ClampedArray, width: number, height: number): ImageData;
+};
+
+interface IntersectionObserver {
+    readonly root: Element | null;
+    readonly rootMargin: string;
+    readonly thresholds: number[];
+    disconnect(): void;
+    observe(target: Element): void;
+    takeRecords(): IntersectionObserverEntry[];
+    unobserve(target: Element): void;
+}
+
+declare var IntersectionObserver: {
+    prototype: IntersectionObserver;
+    new(callback: IntersectionObserverCallback, options?: IntersectionObserverInit): IntersectionObserver;
+};
+
+interface IntersectionObserverEntry {
+    readonly boundingClientRect: ClientRect;
+    readonly intersectionRatio: number;
+    readonly intersectionRect: ClientRect;
+    readonly rootBounds: ClientRect;
+    readonly target: Element;
+    readonly time: number;
+}
+
+declare var IntersectionObserverEntry: {
+    prototype: IntersectionObserverEntry;
+    new(intersectionObserverEntryInit: IntersectionObserverEntryInit): IntersectionObserverEntry;
+};
+
+interface KeyboardEvent extends UIEvent {
+    readonly altKey: boolean;
+    readonly char: string | null;
+    readonly charCode: number;
+    readonly ctrlKey: boolean;
+    readonly key: string;
+    readonly keyCode: number;
+    readonly locale: string;
+    readonly location: number;
+    readonly metaKey: boolean;
+    readonly repeat: boolean;
+    readonly shiftKey: boolean;
+    readonly which: number;
+    readonly code: string;
+    getModifierState(keyArg: string): boolean;
+    initKeyboardEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, keyArg: string, locationArg: number, modifiersListArg: string, repeat: boolean, locale: string): void;
+    readonly DOM_KEY_LOCATION_JOYSTICK: number;
+    readonly DOM_KEY_LOCATION_LEFT: number;
+    readonly DOM_KEY_LOCATION_MOBILE: number;
+    readonly DOM_KEY_LOCATION_NUMPAD: number;
+    readonly DOM_KEY_LOCATION_RIGHT: number;
+    readonly DOM_KEY_LOCATION_STANDARD: number;
+}
+
+declare var KeyboardEvent: {
+    prototype: KeyboardEvent;
+    new(typeArg: string, eventInitDict?: KeyboardEventInit): KeyboardEvent;
+    readonly DOM_KEY_LOCATION_JOYSTICK: number;
+    readonly DOM_KEY_LOCATION_LEFT: number;
+    readonly DOM_KEY_LOCATION_MOBILE: number;
+    readonly DOM_KEY_LOCATION_NUMPAD: number;
+    readonly DOM_KEY_LOCATION_RIGHT: number;
+    readonly DOM_KEY_LOCATION_STANDARD: number;
+};
+
+interface ListeningStateChangedEvent extends Event {
+    readonly label: string;
+    readonly state: ListeningState;
+}
+
+declare var ListeningStateChangedEvent: {
+    prototype: ListeningStateChangedEvent;
+    new(): ListeningStateChangedEvent;
+};
+
+interface Location {
+    hash: string;
+    host: string;
+    hostname: string;
+    href: string;
+    readonly origin: string;
+    pathname: string;
+    port: string;
+    protocol: string;
+    search: string;
+    assign(url: string): void;
+    reload(forcedReload?: boolean): void;
+    replace(url: string): void;
+    toString(): string;
+}
+
+declare var Location: {
+    prototype: Location;
+    new(): Location;
+};
+
+interface LongRunningScriptDetectedEvent extends Event {
+    readonly executionTime: number;
+    stopPageScriptExecution: boolean;
+}
+
+declare var LongRunningScriptDetectedEvent: {
+    prototype: LongRunningScriptDetectedEvent;
+    new(): LongRunningScriptDetectedEvent;
+};
+
+interface MediaDeviceInfo {
+    readonly deviceId: string;
+    readonly groupId: string;
+    readonly kind: MediaDeviceKind;
+    readonly label: string;
+}
+
+declare var MediaDeviceInfo: {
+    prototype: MediaDeviceInfo;
+    new(): MediaDeviceInfo;
+};
+
+interface MediaDevicesEventMap {
+    "devicechange": Event;
+}
+
+interface MediaDevices extends EventTarget {
+    ondevicechange: (this: MediaDevices, ev: Event) => any;
+    enumerateDevices(): any;
+    getSupportedConstraints(): MediaTrackSupportedConstraints;
+    getUserMedia(constraints: MediaStreamConstraints): Promise<MediaStream>;
+    addEventListener<K extends keyof MediaDevicesEventMap>(type: K, listener: (this: MediaDevices, ev: MediaDevicesEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MediaDevices: {
+    prototype: MediaDevices;
+    new(): MediaDevices;
+};
+
+interface MediaElementAudioSourceNode extends AudioNode {
+}
+
+declare var MediaElementAudioSourceNode: {
+    prototype: MediaElementAudioSourceNode;
+    new(): MediaElementAudioSourceNode;
+};
+
+interface MediaEncryptedEvent extends Event {
+    readonly initData: ArrayBuffer | null;
+    readonly initDataType: string;
+}
+
+declare var MediaEncryptedEvent: {
+    prototype: MediaEncryptedEvent;
+    new(type: string, eventInitDict?: MediaEncryptedEventInit): MediaEncryptedEvent;
+};
+
+interface MediaError {
+    readonly code: number;
+    readonly msExtendedCode: number;
+    readonly MEDIA_ERR_ABORTED: number;
+    readonly MEDIA_ERR_DECODE: number;
+    readonly MEDIA_ERR_NETWORK: number;
+    readonly MEDIA_ERR_SRC_NOT_SUPPORTED: number;
+    readonly MS_MEDIA_ERR_ENCRYPTED: number;
+}
+
+declare var MediaError: {
+    prototype: MediaError;
+    new(): MediaError;
+    readonly MEDIA_ERR_ABORTED: number;
+    readonly MEDIA_ERR_DECODE: number;
+    readonly MEDIA_ERR_NETWORK: number;
+    readonly MEDIA_ERR_SRC_NOT_SUPPORTED: number;
+    readonly MS_MEDIA_ERR_ENCRYPTED: number;
+};
+
+interface MediaKeyMessageEvent extends Event {
+    readonly message: ArrayBuffer;
+    readonly messageType: MediaKeyMessageType;
+}
+
+declare var MediaKeyMessageEvent: {
+    prototype: MediaKeyMessageEvent;
+    new(type: string, eventInitDict?: MediaKeyMessageEventInit): MediaKeyMessageEvent;
+};
+
+interface MediaKeys {
+    createSession(sessionType?: MediaKeySessionType): MediaKeySession;
+    setServerCertificate(serverCertificate: any): Promise<void>;
+}
+
+declare var MediaKeys: {
+    prototype: MediaKeys;
+    new(): MediaKeys;
+};
+
+interface MediaKeySession extends EventTarget {
+    readonly closed: Promise<void>;
+    readonly expiration: number;
+    readonly keyStatuses: MediaKeyStatusMap;
+    readonly sessionId: string;
+    close(): Promise<void>;
+    generateRequest(initDataType: string, initData: any): Promise<void>;
+    load(sessionId: string): Promise<boolean>;
+    remove(): Promise<void>;
+    update(response: any): Promise<void>;
+}
+
+declare var MediaKeySession: {
+    prototype: MediaKeySession;
+    new(): MediaKeySession;
+};
+
+interface MediaKeyStatusMap {
+    readonly size: number;
+    forEach(callback: ForEachCallback): void;
+    get(keyId: any): MediaKeyStatus;
+    has(keyId: any): boolean;
+}
+
+declare var MediaKeyStatusMap: {
+    prototype: MediaKeyStatusMap;
+    new(): MediaKeyStatusMap;
+};
+
+interface MediaKeySystemAccess {
+    readonly keySystem: string;
+    createMediaKeys(): Promise<MediaKeys>;
+    getConfiguration(): MediaKeySystemConfiguration;
+}
+
+declare var MediaKeySystemAccess: {
+    prototype: MediaKeySystemAccess;
+    new(): MediaKeySystemAccess;
+};
+
+interface MediaList {
+    readonly length: number;
+    mediaText: string;
+    appendMedium(newMedium: string): void;
+    deleteMedium(oldMedium: string): void;
+    item(index: number): string;
+    toString(): string;
+    [index: number]: string;
+}
+
+declare var MediaList: {
+    prototype: MediaList;
+    new(): MediaList;
+};
+
+interface MediaQueryList {
+    readonly matches: boolean;
+    readonly media: string;
+    addListener(listener: MediaQueryListListener): void;
+    removeListener(listener: MediaQueryListListener): void;
+}
+
+declare var MediaQueryList: {
+    prototype: MediaQueryList;
+    new(): MediaQueryList;
+};
+
+interface MediaSource extends EventTarget {
+    readonly activeSourceBuffers: SourceBufferList;
+    duration: number;
+    readonly readyState: string;
+    readonly sourceBuffers: SourceBufferList;
+    addSourceBuffer(type: string): SourceBuffer;
+    endOfStream(error?: number): void;
+    removeSourceBuffer(sourceBuffer: SourceBuffer): void;
+}
+
+declare var MediaSource: {
+    prototype: MediaSource;
+    new(): MediaSource;
+    isTypeSupported(type: string): boolean;
+};
+
+interface MediaStreamEventMap {
+    "active": Event;
+    "addtrack": MediaStreamTrackEvent;
+    "inactive": Event;
+    "removetrack": MediaStreamTrackEvent;
+}
+
+interface MediaStream extends EventTarget {
+    readonly active: boolean;
+    readonly id: string;
+    onactive: (this: MediaStream, ev: Event) => any;
+    onaddtrack: (this: MediaStream, ev: MediaStreamTrackEvent) => any;
+    oninactive: (this: MediaStream, ev: Event) => any;
+    onremovetrack: (this: MediaStream, ev: MediaStreamTrackEvent) => any;
+    addTrack(track: MediaStreamTrack): void;
+    clone(): MediaStream;
+    getAudioTracks(): MediaStreamTrack[];
+    getTrackById(trackId: string): MediaStreamTrack | null;
+    getTracks(): MediaStreamTrack[];
+    getVideoTracks(): MediaStreamTrack[];
+    removeTrack(track: MediaStreamTrack): void;
+    stop(): void;
+    addEventListener<K extends keyof MediaStreamEventMap>(type: K, listener: (this: MediaStream, ev: MediaStreamEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MediaStream: {
+    prototype: MediaStream;
+    new(streamOrTracks?: MediaStream | MediaStreamTrack[]): MediaStream;
+};
+
+interface MediaStreamAudioSourceNode extends AudioNode {
+}
+
+declare var MediaStreamAudioSourceNode: {
+    prototype: MediaStreamAudioSourceNode;
+    new(): MediaStreamAudioSourceNode;
+};
+
+interface MediaStreamError {
+    readonly constraintName: string | null;
+    readonly message: string | null;
+    readonly name: string;
+}
+
+declare var MediaStreamError: {
+    prototype: MediaStreamError;
+    new(): MediaStreamError;
+};
+
+interface MediaStreamErrorEvent extends Event {
+    readonly error: MediaStreamError | null;
+}
+
+declare var MediaStreamErrorEvent: {
+    prototype: MediaStreamErrorEvent;
+    new(typeArg: string, eventInitDict?: MediaStreamErrorEventInit): MediaStreamErrorEvent;
+};
+
+interface MediaStreamEvent extends Event {
+    readonly stream: MediaStream | null;
+}
+
+declare var MediaStreamEvent: {
+    prototype: MediaStreamEvent;
+    new(type: string, eventInitDict: MediaStreamEventInit): MediaStreamEvent;
+};
+
+interface MediaStreamTrackEventMap {
+    "ended": MediaStreamErrorEvent;
+    "mute": Event;
+    "overconstrained": MediaStreamErrorEvent;
+    "unmute": Event;
+}
+
+interface MediaStreamTrack extends EventTarget {
+    enabled: boolean;
+    readonly id: string;
+    readonly kind: string;
+    readonly label: string;
+    readonly muted: boolean;
+    onended: (this: MediaStreamTrack, ev: MediaStreamErrorEvent) => any;
+    onmute: (this: MediaStreamTrack, ev: Event) => any;
+    onoverconstrained: (this: MediaStreamTrack, ev: MediaStreamErrorEvent) => any;
+    onunmute: (this: MediaStreamTrack, ev: Event) => any;
+    readonly readonly: boolean;
+    readonly readyState: MediaStreamTrackState;
+    readonly remote: boolean;
+    applyConstraints(constraints: MediaTrackConstraints): Promise<void>;
+    clone(): MediaStreamTrack;
+    getCapabilities(): MediaTrackCapabilities;
+    getConstraints(): MediaTrackConstraints;
+    getSettings(): MediaTrackSettings;
+    stop(): void;
+    addEventListener<K extends keyof MediaStreamTrackEventMap>(type: K, listener: (this: MediaStreamTrack, ev: MediaStreamTrackEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MediaStreamTrack: {
+    prototype: MediaStreamTrack;
+    new(): MediaStreamTrack;
+};
+
+interface MediaStreamTrackEvent extends Event {
+    readonly track: MediaStreamTrack;
+}
+
+declare var MediaStreamTrackEvent: {
+    prototype: MediaStreamTrackEvent;
+    new(typeArg: string, eventInitDict?: MediaStreamTrackEventInit): MediaStreamTrackEvent;
+};
+
+interface MessageChannel {
+    readonly port1: MessagePort;
+    readonly port2: MessagePort;
+}
+
+declare var MessageChannel: {
+    prototype: MessageChannel;
+    new(): MessageChannel;
+};
+
+interface MessageEvent extends Event {
+    readonly data: any;
+    readonly origin: string;
+    readonly ports: any;
+    readonly source: Window;
+    initMessageEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, dataArg: any, originArg: string, lastEventIdArg: string, sourceArg: Window): void;
+}
+
+declare var MessageEvent: {
+    prototype: MessageEvent;
+    new(type: string, eventInitDict?: MessageEventInit): MessageEvent;
+};
+
+interface MessagePortEventMap {
+    "message": MessageEvent;
+}
+
+interface MessagePort extends EventTarget {
+    onmessage: (this: MessagePort, ev: MessageEvent) => any;
+    close(): void;
+    postMessage(message?: any, transfer?: any[]): void;
+    start(): void;
+    addEventListener<K extends keyof MessagePortEventMap>(type: K, listener: (this: MessagePort, ev: MessagePortEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MessagePort: {
+    prototype: MessagePort;
+    new(): MessagePort;
+};
+
+interface MimeType {
+    readonly description: string;
+    readonly enabledPlugin: Plugin;
+    readonly suffixes: string;
+    readonly type: string;
+}
+
+declare var MimeType: {
+    prototype: MimeType;
+    new(): MimeType;
+};
+
+interface MimeTypeArray {
+    readonly length: number;
+    item(index: number): Plugin;
+    namedItem(type: string): Plugin;
+    [index: number]: Plugin;
+}
+
+declare var MimeTypeArray: {
+    prototype: MimeTypeArray;
+    new(): MimeTypeArray;
+};
+
+interface MouseEvent extends UIEvent {
+    readonly altKey: boolean;
+    readonly button: number;
+    readonly buttons: number;
+    readonly clientX: number;
+    readonly clientY: number;
+    readonly ctrlKey: boolean;
+    readonly fromElement: Element;
+    readonly layerX: number;
+    readonly layerY: number;
+    readonly metaKey: boolean;
+    readonly movementX: number;
+    readonly movementY: number;
+    readonly offsetX: number;
+    readonly offsetY: number;
+    readonly pageX: number;
+    readonly pageY: number;
+    readonly relatedTarget: EventTarget;
+    readonly screenX: number;
+    readonly screenY: number;
+    readonly shiftKey: boolean;
+    readonly toElement: Element;
+    readonly which: number;
+    readonly x: number;
+    readonly y: number;
+    getModifierState(keyArg: string): boolean;
+    initMouseEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, ctrlKeyArg: boolean, altKeyArg: boolean, shiftKeyArg: boolean, metaKeyArg: boolean, buttonArg: number, relatedTargetArg: EventTarget | null): void;
+}
+
+declare var MouseEvent: {
+    prototype: MouseEvent;
+    new(typeArg: string, eventInitDict?: MouseEventInit): MouseEvent;
+};
+
+interface MSApp {
+    clearTemporaryWebDataAsync(): MSAppAsyncOperation;
+    createBlobFromRandomAccessStream(type: string, seeker: any): Blob;
+    createDataPackage(object: any): any;
+    createDataPackageFromSelection(): any;
+    createFileFromStorageFile(storageFile: any): File;
+    createStreamFromInputStream(type: string, inputStream: any): MSStream;
+    execAsyncAtPriority(asynchronousCallback: MSExecAtPriorityFunctionCallback, priority: string, ...args: any[]): void;
+    execAtPriority(synchronousCallback: MSExecAtPriorityFunctionCallback, priority: string, ...args: any[]): any;
+    getCurrentPriority(): string;
+    getHtmlPrintDocumentSourceAsync(htmlDoc: any): Promise<any>;
+    getViewId(view: any): any;
+    isTaskScheduledAtPriorityOrHigher(priority: string): boolean;
+    pageHandlesAllApplicationActivations(enabled: boolean): void;
+    suppressSubdownloadCredentialPrompts(suppress: boolean): void;
+    terminateApp(exceptionObject: any): void;
+    readonly CURRENT: string;
+    readonly HIGH: string;
+    readonly IDLE: string;
+    readonly NORMAL: string;
+}
+declare var MSApp: MSApp;
+
+interface MSAppAsyncOperationEventMap {
+    "complete": Event;
+    "error": Event;
+}
+
+interface MSAppAsyncOperation extends EventTarget {
+    readonly error: DOMError;
+    oncomplete: (this: MSAppAsyncOperation, ev: Event) => any;
+    onerror: (this: MSAppAsyncOperation, ev: Event) => any;
+    readonly readyState: number;
+    readonly result: any;
+    start(): void;
+    readonly COMPLETED: number;
+    readonly ERROR: number;
+    readonly STARTED: number;
+    addEventListener<K extends keyof MSAppAsyncOperationEventMap>(type: K, listener: (this: MSAppAsyncOperation, ev: MSAppAsyncOperationEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MSAppAsyncOperation: {
+    prototype: MSAppAsyncOperation;
+    new(): MSAppAsyncOperation;
+    readonly COMPLETED: number;
+    readonly ERROR: number;
+    readonly STARTED: number;
+};
+
+interface MSAssertion {
+    readonly id: string;
+    readonly type: MSCredentialType;
+}
+
+declare var MSAssertion: {
+    prototype: MSAssertion;
+    new(): MSAssertion;
+};
+
+interface MSBlobBuilder {
+    append(data: any, endings?: string): void;
+    getBlob(contentType?: string): Blob;
+}
+
+declare var MSBlobBuilder: {
+    prototype: MSBlobBuilder;
+    new(): MSBlobBuilder;
+};
+
+interface MSCredentials {
+    getAssertion(challenge: string, filter?: MSCredentialFilter, params?: MSSignatureParameters): Promise<MSAssertion>;
+    makeCredential(accountInfo: MSAccountInfo, params: MSCredentialParameters[], challenge?: string): Promise<MSAssertion>;
+}
+
+declare var MSCredentials: {
+    prototype: MSCredentials;
+    new(): MSCredentials;
+};
+
+interface MSFIDOCredentialAssertion extends MSAssertion {
+    readonly algorithm: string | Algorithm;
+    readonly attestation: any;
+    readonly publicKey: string;
+    readonly transportHints: MSTransportType[];
+}
+
+declare var MSFIDOCredentialAssertion: {
+    prototype: MSFIDOCredentialAssertion;
+    new(): MSFIDOCredentialAssertion;
+};
+
+interface MSFIDOSignature {
+    readonly authnrData: string;
+    readonly clientData: string;
+    readonly signature: string;
+}
+
+declare var MSFIDOSignature: {
+    prototype: MSFIDOSignature;
+    new(): MSFIDOSignature;
+};
+
+interface MSFIDOSignatureAssertion extends MSAssertion {
+    readonly signature: MSFIDOSignature;
+}
+
+declare var MSFIDOSignatureAssertion: {
+    prototype: MSFIDOSignatureAssertion;
+    new(): MSFIDOSignatureAssertion;
+};
+
+interface MSGesture {
+    target: Element;
+    addPointer(pointerId: number): void;
+    stop(): void;
+}
+
+declare var MSGesture: {
+    prototype: MSGesture;
+    new(): MSGesture;
+};
+
+interface MSGestureEvent extends UIEvent {
+    readonly clientX: number;
+    readonly clientY: number;
+    readonly expansion: number;
+    readonly gestureObject: any;
+    readonly hwTimestamp: number;
+    readonly offsetX: number;
+    readonly offsetY: number;
+    readonly rotation: number;
+    readonly scale: number;
+    readonly screenX: number;
+    readonly screenY: number;
+    readonly translationX: number;
+    readonly translationY: number;
+    readonly velocityAngular: number;
+    readonly velocityExpansion: number;
+    readonly velocityX: number;
+    readonly velocityY: number;
+    initGestureEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, offsetXArg: number, offsetYArg: number, translationXArg: number, translationYArg: number, scaleArg: number, expansionArg: number, rotationArg: number, velocityXArg: number, velocityYArg: number, velocityExpansionArg: number, velocityAngularArg: number, hwTimestampArg: number): void;
+    readonly MSGESTURE_FLAG_BEGIN: number;
+    readonly MSGESTURE_FLAG_CANCEL: number;
+    readonly MSGESTURE_FLAG_END: number;
+    readonly MSGESTURE_FLAG_INERTIA: number;
+    readonly MSGESTURE_FLAG_NONE: number;
+}
+
+declare var MSGestureEvent: {
+    prototype: MSGestureEvent;
+    new(): MSGestureEvent;
+    readonly MSGESTURE_FLAG_BEGIN: number;
+    readonly MSGESTURE_FLAG_CANCEL: number;
+    readonly MSGESTURE_FLAG_END: number;
+    readonly MSGESTURE_FLAG_INERTIA: number;
+    readonly MSGESTURE_FLAG_NONE: number;
+};
+
+interface MSGraphicsTrust {
+    readonly constrictionActive: boolean;
+    readonly status: string;
+}
+
+declare var MSGraphicsTrust: {
+    prototype: MSGraphicsTrust;
+    new(): MSGraphicsTrust;
+};
+
+interface MSHTMLWebViewElement extends HTMLElement {
+    readonly canGoBack: boolean;
+    readonly canGoForward: boolean;
+    readonly containsFullScreenElement: boolean;
+    readonly documentTitle: string;
+    height: number;
+    readonly settings: MSWebViewSettings;
+    src: string;
+    width: number;
+    addWebAllowedObject(name: string, applicationObject: any): void;
+    buildLocalStreamUri(contentIdentifier: string, relativePath: string): string;
+    capturePreviewToBlobAsync(): MSWebViewAsyncOperation;
+    captureSelectedContentToDataPackageAsync(): MSWebViewAsyncOperation;
+    getDeferredPermissionRequestById(id: number): DeferredPermissionRequest;
+    getDeferredPermissionRequests(): DeferredPermissionRequest[];
+    goBack(): void;
+    goForward(): void;
+    invokeScriptAsync(scriptName: string, ...args: any[]): MSWebViewAsyncOperation;
+    navigate(uri: string): void;
+    navigateFocus(navigationReason: NavigationReason, origin: FocusNavigationOrigin): void;
+    navigateToLocalStreamUri(source: string, streamResolver: any): void;
+    navigateToString(contents: string): void;
+    navigateWithHttpRequestMessage(requestMessage: any): void;
+    refresh(): void;
+    stop(): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: MSHTMLWebViewElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MSHTMLWebViewElement: {
+    prototype: MSHTMLWebViewElement;
+    new(): MSHTMLWebViewElement;
+};
+
+interface MSInputMethodContextEventMap {
+    "MSCandidateWindowHide": Event;
+    "MSCandidateWindowShow": Event;
+    "MSCandidateWindowUpdate": Event;
+}
+
+interface MSInputMethodContext extends EventTarget {
+    readonly compositionEndOffset: number;
+    readonly compositionStartOffset: number;
+    oncandidatewindowhide: (this: MSInputMethodContext, ev: Event) => any;
+    oncandidatewindowshow: (this: MSInputMethodContext, ev: Event) => any;
+    oncandidatewindowupdate: (this: MSInputMethodContext, ev: Event) => any;
+    readonly target: HTMLElement;
+    getCandidateWindowClientRect(): ClientRect;
+    getCompositionAlternatives(): string[];
+    hasComposition(): boolean;
+    isCandidateWindowVisible(): boolean;
+    addEventListener<K extends keyof MSInputMethodContextEventMap>(type: K, listener: (this: MSInputMethodContext, ev: MSInputMethodContextEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MSInputMethodContext: {
+    prototype: MSInputMethodContext;
+    new(): MSInputMethodContext;
+};
+
+interface MSManipulationEvent extends UIEvent {
+    readonly currentState: number;
+    readonly inertiaDestinationX: number;
+    readonly inertiaDestinationY: number;
+    readonly lastState: number;
+    initMSManipulationEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, lastState: number, currentState: number): void;
+    readonly MS_MANIPULATION_STATE_ACTIVE: number;
+    readonly MS_MANIPULATION_STATE_CANCELLED: number;
+    readonly MS_MANIPULATION_STATE_COMMITTED: number;
+    readonly MS_MANIPULATION_STATE_DRAGGING: number;
+    readonly MS_MANIPULATION_STATE_INERTIA: number;
+    readonly MS_MANIPULATION_STATE_PRESELECT: number;
+    readonly MS_MANIPULATION_STATE_SELECTING: number;
+    readonly MS_MANIPULATION_STATE_STOPPED: number;
+}
+
+declare var MSManipulationEvent: {
+    prototype: MSManipulationEvent;
+    new(): MSManipulationEvent;
+    readonly MS_MANIPULATION_STATE_ACTIVE: number;
+    readonly MS_MANIPULATION_STATE_CANCELLED: number;
+    readonly MS_MANIPULATION_STATE_COMMITTED: number;
+    readonly MS_MANIPULATION_STATE_DRAGGING: number;
+    readonly MS_MANIPULATION_STATE_INERTIA: number;
+    readonly MS_MANIPULATION_STATE_PRESELECT: number;
+    readonly MS_MANIPULATION_STATE_SELECTING: number;
+    readonly MS_MANIPULATION_STATE_STOPPED: number;
+};
+
+interface MSMediaKeyError {
+    readonly code: number;
+    readonly systemCode: number;
+    readonly MS_MEDIA_KEYERR_CLIENT: number;
+    readonly MS_MEDIA_KEYERR_DOMAIN: number;
+    readonly MS_MEDIA_KEYERR_HARDWARECHANGE: number;
+    readonly MS_MEDIA_KEYERR_OUTPUT: number;
+    readonly MS_MEDIA_KEYERR_SERVICE: number;
+    readonly MS_MEDIA_KEYERR_UNKNOWN: number;
+}
+
+declare var MSMediaKeyError: {
+    prototype: MSMediaKeyError;
+    new(): MSMediaKeyError;
+    readonly MS_MEDIA_KEYERR_CLIENT: number;
+    readonly MS_MEDIA_KEYERR_DOMAIN: number;
+    readonly MS_MEDIA_KEYERR_HARDWARECHANGE: number;
+    readonly MS_MEDIA_KEYERR_OUTPUT: number;
+    readonly MS_MEDIA_KEYERR_SERVICE: number;
+    readonly MS_MEDIA_KEYERR_UNKNOWN: number;
+};
+
+interface MSMediaKeyMessageEvent extends Event {
+    readonly destinationURL: string | null;
+    readonly message: Uint8Array;
+}
+
+declare var MSMediaKeyMessageEvent: {
+    prototype: MSMediaKeyMessageEvent;
+    new(): MSMediaKeyMessageEvent;
+};
+
+interface MSMediaKeyNeededEvent extends Event {
+    readonly initData: Uint8Array | null;
+}
+
+declare var MSMediaKeyNeededEvent: {
+    prototype: MSMediaKeyNeededEvent;
+    new(): MSMediaKeyNeededEvent;
+};
+
+interface MSMediaKeys {
+    readonly keySystem: string;
+    createSession(type: string, initData: Uint8Array, cdmData?: Uint8Array): MSMediaKeySession;
+}
+
+declare var MSMediaKeys: {
+    prototype: MSMediaKeys;
+    new(keySystem: string): MSMediaKeys;
+    isTypeSupported(keySystem: string, type?: string): boolean;
+    isTypeSupportedWithFeatures(keySystem: string, type?: string): string;
+};
+
+interface MSMediaKeySession extends EventTarget {
+    readonly error: MSMediaKeyError | null;
+    readonly keySystem: string;
+    readonly sessionId: string;
+    close(): void;
+    update(key: Uint8Array): void;
+}
+
+declare var MSMediaKeySession: {
+    prototype: MSMediaKeySession;
+    new(): MSMediaKeySession;
+};
+
+interface MSPointerEvent extends MouseEvent {
+    readonly currentPoint: any;
+    readonly height: number;
+    readonly hwTimestamp: number;
+    readonly intermediatePoints: any;
+    readonly isPrimary: boolean;
+    readonly pointerId: number;
+    readonly pointerType: any;
+    readonly pressure: number;
+    readonly rotation: number;
+    readonly tiltX: number;
+    readonly tiltY: number;
+    readonly width: number;
+    getCurrentPoint(element: Element): void;
+    getIntermediatePoints(element: Element): void;
+    initPointerEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, ctrlKeyArg: boolean, altKeyArg: boolean, shiftKeyArg: boolean, metaKeyArg: boolean, buttonArg: number, relatedTargetArg: EventTarget, offsetXArg: number, offsetYArg: number, widthArg: number, heightArg: number, pressure: number, rotation: number, tiltX: number, tiltY: number, pointerIdArg: number, pointerType: any, hwTimestampArg: number, isPrimary: boolean): void;
+}
+
+declare var MSPointerEvent: {
+    prototype: MSPointerEvent;
+    new(typeArg: string, eventInitDict?: PointerEventInit): MSPointerEvent;
+};
+
+interface MSRangeCollection {
+    readonly length: number;
+    item(index: number): Range;
+    [index: number]: Range;
+}
+
+declare var MSRangeCollection: {
+    prototype: MSRangeCollection;
+    new(): MSRangeCollection;
+};
+
+interface MSSiteModeEvent extends Event {
+    readonly actionURL: string;
+    readonly buttonID: number;
+}
+
+declare var MSSiteModeEvent: {
+    prototype: MSSiteModeEvent;
+    new(): MSSiteModeEvent;
+};
+
+interface MSStream {
+    readonly type: string;
+    msClose(): void;
+    msDetachStream(): any;
+}
+
+declare var MSStream: {
+    prototype: MSStream;
+    new(): MSStream;
+};
+
+interface MSStreamReader extends EventTarget, MSBaseReader {
+    readonly error: DOMError;
+    readAsArrayBuffer(stream: MSStream, size?: number): void;
+    readAsBinaryString(stream: MSStream, size?: number): void;
+    readAsBlob(stream: MSStream, size?: number): void;
+    readAsDataURL(stream: MSStream, size?: number): void;
+    readAsText(stream: MSStream, encoding?: string, size?: number): void;
+    addEventListener<K extends keyof MSBaseReaderEventMap>(type: K, listener: (this: MSStreamReader, ev: MSBaseReaderEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MSStreamReader: {
+    prototype: MSStreamReader;
+    new(): MSStreamReader;
+};
+
+interface MSWebViewAsyncOperationEventMap {
+    "complete": Event;
+    "error": Event;
+}
+
+interface MSWebViewAsyncOperation extends EventTarget {
+    readonly error: DOMError;
+    oncomplete: (this: MSWebViewAsyncOperation, ev: Event) => any;
+    onerror: (this: MSWebViewAsyncOperation, ev: Event) => any;
+    readonly readyState: number;
+    readonly result: any;
+    readonly target: MSHTMLWebViewElement;
+    readonly type: number;
+    start(): void;
+    readonly COMPLETED: number;
+    readonly ERROR: number;
+    readonly STARTED: number;
+    readonly TYPE_CAPTURE_PREVIEW_TO_RANDOM_ACCESS_STREAM: number;
+    readonly TYPE_CREATE_DATA_PACKAGE_FROM_SELECTION: number;
+    readonly TYPE_INVOKE_SCRIPT: number;
+    addEventListener<K extends keyof MSWebViewAsyncOperationEventMap>(type: K, listener: (this: MSWebViewAsyncOperation, ev: MSWebViewAsyncOperationEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MSWebViewAsyncOperation: {
+    prototype: MSWebViewAsyncOperation;
+    new(): MSWebViewAsyncOperation;
+    readonly COMPLETED: number;
+    readonly ERROR: number;
+    readonly STARTED: number;
+    readonly TYPE_CAPTURE_PREVIEW_TO_RANDOM_ACCESS_STREAM: number;
+    readonly TYPE_CREATE_DATA_PACKAGE_FROM_SELECTION: number;
+    readonly TYPE_INVOKE_SCRIPT: number;
+};
+
+interface MSWebViewSettings {
+    isIndexedDBEnabled: boolean;
+    isJavaScriptEnabled: boolean;
+}
+
+declare var MSWebViewSettings: {
+    prototype: MSWebViewSettings;
+    new(): MSWebViewSettings;
+};
+
+interface MutationEvent extends Event {
+    readonly attrChange: number;
+    readonly attrName: string;
+    readonly newValue: string;
+    readonly prevValue: string;
+    readonly relatedNode: Node;
+    initMutationEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, relatedNodeArg: Node, prevValueArg: string, newValueArg: string, attrNameArg: string, attrChangeArg: number): void;
+    readonly ADDITION: number;
+    readonly MODIFICATION: number;
+    readonly REMOVAL: number;
+}
+
+declare var MutationEvent: {
+    prototype: MutationEvent;
+    new(): MutationEvent;
+    readonly ADDITION: number;
+    readonly MODIFICATION: number;
+    readonly REMOVAL: number;
+};
+
+interface MutationObserver {
+    disconnect(): void;
+    observe(target: Node, options: MutationObserverInit): void;
+    takeRecords(): MutationRecord[];
+}
+
+declare var MutationObserver: {
+    prototype: MutationObserver;
+    new(callback: MutationCallback): MutationObserver;
+};
+
+interface MutationRecord {
+    readonly addedNodes: NodeList;
+    readonly attributeName: string | null;
+    readonly attributeNamespace: string | null;
+    readonly nextSibling: Node | null;
+    readonly oldValue: string | null;
+    readonly previousSibling: Node | null;
+    readonly removedNodes: NodeList;
+    readonly target: Node;
+    readonly type: string;
+}
+
+declare var MutationRecord: {
+    prototype: MutationRecord;
+    new(): MutationRecord;
+};
+
+interface NamedNodeMap {
+    readonly length: number;
+    getNamedItem(name: string): Attr;
+    getNamedItemNS(namespaceURI: string | null, localName: string | null): Attr;
+    item(index: number): Attr;
+    removeNamedItem(name: string): Attr;
+    removeNamedItemNS(namespaceURI: string | null, localName: string | null): Attr;
+    setNamedItem(arg: Attr): Attr;
+    setNamedItemNS(arg: Attr): Attr;
+    [index: number]: Attr;
+}
+
+declare var NamedNodeMap: {
+    prototype: NamedNodeMap;
+    new(): NamedNodeMap;
+};
+
+interface NavigationCompletedEvent extends NavigationEvent {
+    readonly isSuccess: boolean;
+    readonly webErrorStatus: number;
+}
+
+declare var NavigationCompletedEvent: {
+    prototype: NavigationCompletedEvent;
+    new(): NavigationCompletedEvent;
+};
+
+interface NavigationEvent extends Event {
+    readonly uri: string;
+}
+
+declare var NavigationEvent: {
+    prototype: NavigationEvent;
+    new(): NavigationEvent;
+};
+
+interface NavigationEventWithReferrer extends NavigationEvent {
+    readonly referer: string;
+}
+
+declare var NavigationEventWithReferrer: {
+    prototype: NavigationEventWithReferrer;
+    new(): NavigationEventWithReferrer;
+};
+
+interface Navigator extends Object, NavigatorID, NavigatorOnLine, NavigatorContentUtils, NavigatorStorageUtils, NavigatorGeolocation, MSNavigatorDoNotTrack, MSFileSaver, NavigatorBeacon, NavigatorConcurrentHardware, NavigatorUserMedia {
+    readonly authentication: WebAuthentication;
+    readonly cookieEnabled: boolean;
+    gamepadInputEmulation: GamepadInputEmulationType;
+    readonly language: string;
+    readonly maxTouchPoints: number;
+    readonly mimeTypes: MimeTypeArray;
+    readonly msManipulationViewsEnabled: boolean;
+    readonly msMaxTouchPoints: number;
+    readonly msPointerEnabled: boolean;
+    readonly plugins: PluginArray;
+    readonly pointerEnabled: boolean;
+    readonly serviceWorker: ServiceWorkerContainer;
+    readonly webdriver: boolean;
+    readonly hardwareConcurrency: number;
+    readonly languages: string[];
+    getGamepads(): Gamepad[];
+    javaEnabled(): boolean;
+    msLaunchUri(uri: string, successCallback?: MSLaunchUriCallback, noHandlerCallback?: MSLaunchUriCallback): void;
+    requestMediaKeySystemAccess(keySystem: string, supportedConfigurations: MediaKeySystemConfiguration[]): Promise<MediaKeySystemAccess>;
+    vibrate(pattern: number | number[]): boolean;
+}
+
+declare var Navigator: {
+    prototype: Navigator;
+    new(): Navigator;
+};
+
+interface Node extends EventTarget {
+    readonly attributes: NamedNodeMap;
+    readonly baseURI: string | null;
+    readonly childNodes: NodeList;
+    readonly firstChild: Node | null;
+    readonly lastChild: Node | null;
+    readonly localName: string | null;
+    readonly namespaceURI: string | null;
+    readonly nextSibling: Node | null;
+    readonly nodeName: string;
+    readonly nodeType: number;
+    nodeValue: string | null;
+    readonly ownerDocument: Document;
+    readonly parentElement: HTMLElement | null;
+    readonly parentNode: Node | null;
+    readonly previousSibling: Node | null;
+    textContent: string | null;
+    appendChild<T extends Node>(newChild: T): T;
+    cloneNode(deep?: boolean): Node;
+    compareDocumentPosition(other: Node): number;
+    contains(child: Node): boolean;
+    hasAttributes(): boolean;
+    hasChildNodes(): boolean;
+    insertBefore<T extends Node>(newChild: T, refChild: Node | null): T;
+    isDefaultNamespace(namespaceURI: string | null): boolean;
+    isEqualNode(arg: Node): boolean;
+    isSameNode(other: Node): boolean;
+    lookupNamespaceURI(prefix: string | null): string | null;
+    lookupPrefix(namespaceURI: string | null): string | null;
+    normalize(): void;
+    removeChild<T extends Node>(oldChild: T): T;
+    replaceChild<T extends Node>(newChild: Node, oldChild: T): T;
+    readonly ATTRIBUTE_NODE: number;
+    readonly CDATA_SECTION_NODE: number;
+    readonly COMMENT_NODE: number;
+    readonly DOCUMENT_FRAGMENT_NODE: number;
+    readonly DOCUMENT_NODE: number;
+    readonly DOCUMENT_POSITION_CONTAINED_BY: number;
+    readonly DOCUMENT_POSITION_CONTAINS: number;
+    readonly DOCUMENT_POSITION_DISCONNECTED: number;
+    readonly DOCUMENT_POSITION_FOLLOWING: number;
+    readonly DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC: number;
+    readonly DOCUMENT_POSITION_PRECEDING: number;
+    readonly DOCUMENT_TYPE_NODE: number;
+    readonly ELEMENT_NODE: number;
+    readonly ENTITY_NODE: number;
+    readonly ENTITY_REFERENCE_NODE: number;
+    readonly NOTATION_NODE: number;
+    readonly PROCESSING_INSTRUCTION_NODE: number;
+    readonly TEXT_NODE: number;
+}
+
+declare var Node: {
+    prototype: Node;
+    new(): Node;
+    readonly ATTRIBUTE_NODE: number;
+    readonly CDATA_SECTION_NODE: number;
+    readonly COMMENT_NODE: number;
+    readonly DOCUMENT_FRAGMENT_NODE: number;
+    readonly DOCUMENT_NODE: number;
+    readonly DOCUMENT_POSITION_CONTAINED_BY: number;
+    readonly DOCUMENT_POSITION_CONTAINS: number;
+    readonly DOCUMENT_POSITION_DISCONNECTED: number;
+    readonly DOCUMENT_POSITION_FOLLOWING: number;
+    readonly DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC: number;
+    readonly DOCUMENT_POSITION_PRECEDING: number;
+    readonly DOCUMENT_TYPE_NODE: number;
+    readonly ELEMENT_NODE: number;
+    readonly ENTITY_NODE: number;
+    readonly ENTITY_REFERENCE_NODE: number;
+    readonly NOTATION_NODE: number;
+    readonly PROCESSING_INSTRUCTION_NODE: number;
+    readonly TEXT_NODE: number;
+};
+
+interface NodeFilter {
+    acceptNode(n: Node): number;
+}
+
+declare var NodeFilter: {
+    readonly FILTER_ACCEPT: number;
+    readonly FILTER_REJECT: number;
+    readonly FILTER_SKIP: number;
+    readonly SHOW_ALL: number;
+    readonly SHOW_ATTRIBUTE: number;
+    readonly SHOW_CDATA_SECTION: number;
+    readonly SHOW_COMMENT: number;
+    readonly SHOW_DOCUMENT: number;
+    readonly SHOW_DOCUMENT_FRAGMENT: number;
+    readonly SHOW_DOCUMENT_TYPE: number;
+    readonly SHOW_ELEMENT: number;
+    readonly SHOW_ENTITY: number;
+    readonly SHOW_ENTITY_REFERENCE: number;
+    readonly SHOW_NOTATION: number;
+    readonly SHOW_PROCESSING_INSTRUCTION: number;
+    readonly SHOW_TEXT: number;
+};
+
+interface NodeIterator {
+    readonly expandEntityReferences: boolean;
+    readonly filter: NodeFilter;
+    readonly root: Node;
+    readonly whatToShow: number;
+    detach(): void;
+    nextNode(): Node;
+    previousNode(): Node;
+}
+
+declare var NodeIterator: {
+    prototype: NodeIterator;
+    new(): NodeIterator;
+};
+
+interface NodeList {
+    readonly length: number;
+    item(index: number): Node;
+    [index: number]: Node;
+}
+
+declare var NodeList: {
+    prototype: NodeList;
+    new(): NodeList;
+};
+
+interface NotificationEventMap {
+    "click": Event;
+    "close": Event;
+    "error": Event;
+    "show": Event;
+}
+
+interface Notification extends EventTarget {
+    readonly body: string;
+    readonly dir: NotificationDirection;
+    readonly icon: string;
+    readonly lang: string;
+    onclick: (this: Notification, ev: Event) => any;
+    onclose: (this: Notification, ev: Event) => any;
+    onerror: (this: Notification, ev: Event) => any;
+    onshow: (this: Notification, ev: Event) => any;
+    readonly permission: NotificationPermission;
+    readonly tag: string;
+    readonly title: string;
+    close(): void;
+    addEventListener<K extends keyof NotificationEventMap>(type: K, listener: (this: Notification, ev: NotificationEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var Notification: {
+    prototype: Notification;
+    new(title: string, options?: NotificationOptions): Notification;
+    requestPermission(callback?: NotificationPermissionCallback): Promise<NotificationPermission>;
+};
+
+interface OES_element_index_uint {
+}
+
+declare var OES_element_index_uint: {
+    prototype: OES_element_index_uint;
+    new(): OES_element_index_uint;
+};
+
+interface OES_standard_derivatives {
+    readonly FRAGMENT_SHADER_DERIVATIVE_HINT_OES: number;
+}
+
+declare var OES_standard_derivatives: {
+    prototype: OES_standard_derivatives;
+    new(): OES_standard_derivatives;
+    readonly FRAGMENT_SHADER_DERIVATIVE_HINT_OES: number;
+};
+
+interface OES_texture_float {
+}
+
+declare var OES_texture_float: {
+    prototype: OES_texture_float;
+    new(): OES_texture_float;
+};
+
+interface OES_texture_float_linear {
+}
+
+declare var OES_texture_float_linear: {
+    prototype: OES_texture_float_linear;
+    new(): OES_texture_float_linear;
+};
+
+interface OES_texture_half_float {
+    readonly HALF_FLOAT_OES: number;
+}
+
+declare var OES_texture_half_float: {
+    prototype: OES_texture_half_float;
+    new(): OES_texture_half_float;
+    readonly HALF_FLOAT_OES: number;
+};
+
+interface OES_texture_half_float_linear {
+}
+
+declare var OES_texture_half_float_linear: {
+    prototype: OES_texture_half_float_linear;
+    new(): OES_texture_half_float_linear;
+};
+
+interface OfflineAudioCompletionEvent extends Event {
+    readonly renderedBuffer: AudioBuffer;
+}
+
+declare var OfflineAudioCompletionEvent: {
+    prototype: OfflineAudioCompletionEvent;
+    new(): OfflineAudioCompletionEvent;
+};
+
+interface OfflineAudioContextEventMap extends AudioContextEventMap {
+    "complete": OfflineAudioCompletionEvent;
+}
+
+interface OfflineAudioContext extends AudioContextBase {
+    readonly length: number;
+    oncomplete: (this: OfflineAudioContext, ev: OfflineAudioCompletionEvent) => any;
+    startRendering(): Promise<AudioBuffer>;
+    suspend(suspendTime: number): Promise<void>;
+    addEventListener<K extends keyof OfflineAudioContextEventMap>(type: K, listener: (this: OfflineAudioContext, ev: OfflineAudioContextEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var OfflineAudioContext: {
+    prototype: OfflineAudioContext;
+    new(numberOfChannels: number, length: number, sampleRate: number): OfflineAudioContext;
+};
+
+interface OscillatorNodeEventMap {
+    "ended": MediaStreamErrorEvent;
+}
+
+interface OscillatorNode extends AudioNode {
+    readonly detune: AudioParam;
+    readonly frequency: AudioParam;
+    onended: (this: OscillatorNode, ev: MediaStreamErrorEvent) => any;
+    type: OscillatorType;
+    setPeriodicWave(periodicWave: PeriodicWave): void;
+    start(when?: number): void;
+    stop(when?: number): void;
+    addEventListener<K extends keyof OscillatorNodeEventMap>(type: K, listener: (this: OscillatorNode, ev: OscillatorNodeEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var OscillatorNode: {
+    prototype: OscillatorNode;
+    new(): OscillatorNode;
+};
+
+interface OverflowEvent extends UIEvent {
+    readonly horizontalOverflow: boolean;
+    readonly orient: number;
+    readonly verticalOverflow: boolean;
+    readonly BOTH: number;
+    readonly HORIZONTAL: number;
+    readonly VERTICAL: number;
+}
+
+declare var OverflowEvent: {
+    prototype: OverflowEvent;
+    new(): OverflowEvent;
+    readonly BOTH: number;
+    readonly HORIZONTAL: number;
+    readonly VERTICAL: number;
+};
+
+interface PageTransitionEvent extends Event {
+    readonly persisted: boolean;
+}
+
+declare var PageTransitionEvent: {
+    prototype: PageTransitionEvent;
+    new(): PageTransitionEvent;
+};
+
+interface PannerNode extends AudioNode {
+    coneInnerAngle: number;
+    coneOuterAngle: number;
+    coneOuterGain: number;
+    distanceModel: DistanceModelType;
+    maxDistance: number;
+    panningModel: PanningModelType;
+    refDistance: number;
+    rolloffFactor: number;
+    setOrientation(x: number, y: number, z: number): void;
+    setPosition(x: number, y: number, z: number): void;
+    setVelocity(x: number, y: number, z: number): void;
+}
+
+declare var PannerNode: {
+    prototype: PannerNode;
+    new(): PannerNode;
+};
+
+interface Path2D extends Object, CanvasPathMethods {
+}
+
+declare var Path2D: {
+    prototype: Path2D;
+    new(path?: Path2D): Path2D;
+};
+
+interface PaymentAddress {
+    readonly addressLine: string[];
+    readonly city: string;
+    readonly country: string;
+    readonly dependentLocality: string;
+    readonly languageCode: string;
+    readonly organization: string;
+    readonly phone: string;
+    readonly postalCode: string;
+    readonly recipient: string;
+    readonly region: string;
+    readonly sortingCode: string;
+    toJSON(): any;
+}
+
+declare var PaymentAddress: {
+    prototype: PaymentAddress;
+    new(): PaymentAddress;
+};
+
+interface PaymentRequestEventMap {
+    "shippingaddresschange": Event;
+    "shippingoptionchange": Event;
+}
+
+interface PaymentRequest extends EventTarget {
+    onshippingaddresschange: (this: PaymentRequest, ev: Event) => any;
+    onshippingoptionchange: (this: PaymentRequest, ev: Event) => any;
+    readonly shippingAddress: PaymentAddress | null;
+    readonly shippingOption: string | null;
+    readonly shippingType: PaymentShippingType | null;
+    abort(): Promise<void>;
+    show(): Promise<PaymentResponse>;
+    addEventListener<K extends keyof PaymentRequestEventMap>(type: K, listener: (this: PaymentRequest, ev: PaymentRequestEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var PaymentRequest: {
+    prototype: PaymentRequest;
+    new(methodData: PaymentMethodData[], details: PaymentDetails, options?: PaymentOptions): PaymentRequest;
+};
+
+interface PaymentRequestUpdateEvent extends Event {
+    updateWith(d: Promise<PaymentDetails>): void;
+}
+
+declare var PaymentRequestUpdateEvent: {
+    prototype: PaymentRequestUpdateEvent;
+    new(type: string, eventInitDict?: PaymentRequestUpdateEventInit): PaymentRequestUpdateEvent;
+};
+
+interface PaymentResponse {
+    readonly details: any;
+    readonly methodName: string;
+    readonly payerEmail: string | null;
+    readonly payerName: string | null;
+    readonly payerPhone: string | null;
+    readonly shippingAddress: PaymentAddress | null;
+    readonly shippingOption: string | null;
+    complete(result?: PaymentComplete): Promise<void>;
+    toJSON(): any;
+}
+
+declare var PaymentResponse: {
+    prototype: PaymentResponse;
+    new(): PaymentResponse;
+};
+
+interface Performance {
+    readonly navigation: PerformanceNavigation;
+    readonly timing: PerformanceTiming;
+    clearMarks(markName?: string): void;
+    clearMeasures(measureName?: string): void;
+    clearResourceTimings(): void;
+    getEntries(): any;
+    getEntriesByName(name: string, entryType?: string): any;
+    getEntriesByType(entryType: string): any;
+    getMarks(markName?: string): any;
+    getMeasures(measureName?: string): any;
+    mark(markName: string): void;
+    measure(measureName: string, startMarkName?: string, endMarkName?: string): void;
+    now(): number;
+    setResourceTimingBufferSize(maxSize: number): void;
+    toJSON(): any;
+}
+
+declare var Performance: {
+    prototype: Performance;
+    new(): Performance;
+};
+
+interface PerformanceEntry {
+    readonly duration: number;
+    readonly entryType: string;
+    readonly name: string;
+    readonly startTime: number;
+}
+
+declare var PerformanceEntry: {
+    prototype: PerformanceEntry;
+    new(): PerformanceEntry;
+};
+
+interface PerformanceMark extends PerformanceEntry {
+}
+
+declare var PerformanceMark: {
+    prototype: PerformanceMark;
+    new(): PerformanceMark;
+};
+
+interface PerformanceMeasure extends PerformanceEntry {
+}
+
+declare var PerformanceMeasure: {
+    prototype: PerformanceMeasure;
+    new(): PerformanceMeasure;
+};
+
+interface PerformanceNavigation {
+    readonly redirectCount: number;
+    readonly type: number;
+    toJSON(): any;
+    readonly TYPE_BACK_FORWARD: number;
+    readonly TYPE_NAVIGATE: number;
+    readonly TYPE_RELOAD: number;
+    readonly TYPE_RESERVED: number;
+}
+
+declare var PerformanceNavigation: {
+    prototype: PerformanceNavigation;
+    new(): PerformanceNavigation;
+    readonly TYPE_BACK_FORWARD: number;
+    readonly TYPE_NAVIGATE: number;
+    readonly TYPE_RELOAD: number;
+    readonly TYPE_RESERVED: number;
+};
+
+interface PerformanceNavigationTiming extends PerformanceEntry {
+    readonly connectEnd: number;
+    readonly connectStart: number;
+    readonly domainLookupEnd: number;
+    readonly domainLookupStart: number;
+    readonly domComplete: number;
+    readonly domContentLoadedEventEnd: number;
+    readonly domContentLoadedEventStart: number;
+    readonly domInteractive: number;
+    readonly domLoading: number;
+    readonly fetchStart: number;
+    readonly loadEventEnd: number;
+    readonly loadEventStart: number;
+    readonly navigationStart: number;
+    readonly redirectCount: number;
+    readonly redirectEnd: number;
+    readonly redirectStart: number;
+    readonly requestStart: number;
+    readonly responseEnd: number;
+    readonly responseStart: number;
+    readonly type: NavigationType;
+    readonly unloadEventEnd: number;
+    readonly unloadEventStart: number;
+}
+
+declare var PerformanceNavigationTiming: {
+    prototype: PerformanceNavigationTiming;
+    new(): PerformanceNavigationTiming;
+};
+
+interface PerformanceResourceTiming extends PerformanceEntry {
+    readonly connectEnd: number;
+    readonly connectStart: number;
+    readonly domainLookupEnd: number;
+    readonly domainLookupStart: number;
+    readonly fetchStart: number;
+    readonly initiatorType: string;
+    readonly redirectEnd: number;
+    readonly redirectStart: number;
+    readonly requestStart: number;
+    readonly responseEnd: number;
+    readonly responseStart: number;
+}
+
+declare var PerformanceResourceTiming: {
+    prototype: PerformanceResourceTiming;
+    new(): PerformanceResourceTiming;
+};
+
+interface PerformanceTiming {
+    readonly connectEnd: number;
+    readonly connectStart: number;
+    readonly domainLookupEnd: number;
+    readonly domainLookupStart: number;
+    readonly domComplete: number;
+    readonly domContentLoadedEventEnd: number;
+    readonly domContentLoadedEventStart: number;
+    readonly domInteractive: number;
+    readonly domLoading: number;
+    readonly fetchStart: number;
+    readonly loadEventEnd: number;
+    readonly loadEventStart: number;
+    readonly msFirstPaint: number;
+    readonly navigationStart: number;
+    readonly redirectEnd: number;
+    readonly redirectStart: number;
+    readonly requestStart: number;
+    readonly responseEnd: number;
+    readonly responseStart: number;
+    readonly unloadEventEnd: number;
+    readonly unloadEventStart: number;
+    readonly secureConnectionStart: number;
+    toJSON(): any;
+}
+
+declare var PerformanceTiming: {
+    prototype: PerformanceTiming;
+    new(): PerformanceTiming;
+};
+
+interface PerfWidgetExternal {
+    readonly activeNetworkRequestCount: number;
+    readonly averageFrameTime: number;
+    readonly averagePaintTime: number;
+    readonly extraInformationEnabled: boolean;
+    readonly independentRenderingEnabled: boolean;
+    readonly irDisablingContentString: string;
+    readonly irStatusAvailable: boolean;
+    readonly maxCpuSpeed: number;
+    readonly paintRequestsPerSecond: number;
+    readonly performanceCounter: number;
+    readonly performanceCounterFrequency: number;
+    addEventListener(eventType: string, callback: Function): void;
+    getMemoryUsage(): number;
+    getProcessCpuUsage(): number;
+    getRecentCpuUsage(last: number | null): any;
+    getRecentFrames(last: number | null): any;
+    getRecentMemoryUsage(last: number | null): any;
+    getRecentPaintRequests(last: number | null): any;
+    removeEventListener(eventType: string, callback: Function): void;
+    repositionWindow(x: number, y: number): void;
+    resizeWindow(width: number, height: number): void;
+}
+
+declare var PerfWidgetExternal: {
+    prototype: PerfWidgetExternal;
+    new(): PerfWidgetExternal;
+};
+
+interface PeriodicWave {
+}
+
+declare var PeriodicWave: {
+    prototype: PeriodicWave;
+    new(): PeriodicWave;
+};
+
+interface PermissionRequest extends DeferredPermissionRequest {
+    readonly state: MSWebViewPermissionState;
+    defer(): void;
+}
+
+declare var PermissionRequest: {
+    prototype: PermissionRequest;
+    new(): PermissionRequest;
+};
+
+interface PermissionRequestedEvent extends Event {
+    readonly permissionRequest: PermissionRequest;
+}
+
+declare var PermissionRequestedEvent: {
+    prototype: PermissionRequestedEvent;
+    new(): PermissionRequestedEvent;
+};
+
+interface Plugin {
+    readonly description: string;
+    readonly filename: string;
+    readonly length: number;
+    readonly name: string;
+    readonly version: string;
+    item(index: number): MimeType;
+    namedItem(type: string): MimeType;
+    [index: number]: MimeType;
+}
+
+declare var Plugin: {
+    prototype: Plugin;
+    new(): Plugin;
+};
+
+interface PluginArray {
+    readonly length: number;
+    item(index: number): Plugin;
+    namedItem(name: string): Plugin;
+    refresh(reload?: boolean): void;
+    [index: number]: Plugin;
+}
+
+declare var PluginArray: {
+    prototype: PluginArray;
+    new(): PluginArray;
+};
+
+interface PointerEvent extends MouseEvent {
+    readonly currentPoint: any;
+    readonly height: number;
+    readonly hwTimestamp: number;
+    readonly intermediatePoints: any;
+    readonly isPrimary: boolean;
+    readonly pointerId: number;
+    readonly pointerType: any;
+    readonly pressure: number;
+    readonly rotation: number;
+    readonly tiltX: number;
+    readonly tiltY: number;
+    readonly width: number;
+    getCurrentPoint(element: Element): void;
+    getIntermediatePoints(element: Element): void;
+    initPointerEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, ctrlKeyArg: boolean, altKeyArg: boolean, shiftKeyArg: boolean, metaKeyArg: boolean, buttonArg: number, relatedTargetArg: EventTarget, offsetXArg: number, offsetYArg: number, widthArg: number, heightArg: number, pressure: number, rotation: number, tiltX: number, tiltY: number, pointerIdArg: number, pointerType: any, hwTimestampArg: number, isPrimary: boolean): void;
+}
+
+declare var PointerEvent: {
+    prototype: PointerEvent;
+    new(typeArg: string, eventInitDict?: PointerEventInit): PointerEvent;
+};
+
+interface PopStateEvent extends Event {
+    readonly state: any;
+    initPopStateEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, stateArg: any): void;
+}
+
+declare var PopStateEvent: {
+    prototype: PopStateEvent;
+    new(typeArg: string, eventInitDict?: PopStateEventInit): PopStateEvent;
+};
+
+interface Position {
+    readonly coords: Coordinates;
+    readonly timestamp: number;
+}
+
+declare var Position: {
+    prototype: Position;
+    new(): Position;
+};
+
+interface PositionError {
+    readonly code: number;
+    readonly message: string;
+    toString(): string;
+    readonly PERMISSION_DENIED: number;
+    readonly POSITION_UNAVAILABLE: number;
+    readonly TIMEOUT: number;
+}
+
+declare var PositionError: {
+    prototype: PositionError;
+    new(): PositionError;
+    readonly PERMISSION_DENIED: number;
+    readonly POSITION_UNAVAILABLE: number;
+    readonly TIMEOUT: number;
+};
+
+interface ProcessingInstruction extends CharacterData {
+    readonly target: string;
+}
+
+declare var ProcessingInstruction: {
+    prototype: ProcessingInstruction;
+    new(): ProcessingInstruction;
+};
+
+interface ProgressEvent extends Event {
+    readonly lengthComputable: boolean;
+    readonly loaded: number;
+    readonly total: number;
+    initProgressEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, lengthComputableArg: boolean, loadedArg: number, totalArg: number): void;
+}
+
+declare var ProgressEvent: {
+    prototype: ProgressEvent;
+    new(type: string, eventInitDict?: ProgressEventInit): ProgressEvent;
+};
+
+interface PushManager {
+    getSubscription(): Promise<PushSubscription>;
+    permissionState(options?: PushSubscriptionOptionsInit): Promise<PushPermissionState>;
+    subscribe(options?: PushSubscriptionOptionsInit): Promise<PushSubscription>;
+}
+
+declare var PushManager: {
+    prototype: PushManager;
+    new(): PushManager;
+};
+
+interface PushSubscription {
+    readonly endpoint: USVString;
+    readonly options: PushSubscriptionOptions;
+    getKey(name: PushEncryptionKeyName): ArrayBuffer | null;
+    toJSON(): any;
+    unsubscribe(): Promise<boolean>;
+}
+
+declare var PushSubscription: {
+    prototype: PushSubscription;
+    new(): PushSubscription;
+};
+
+interface PushSubscriptionOptions {
+    readonly applicationServerKey: ArrayBuffer | null;
+    readonly userVisibleOnly: boolean;
+}
+
+declare var PushSubscriptionOptions: {
+    prototype: PushSubscriptionOptions;
+    new(): PushSubscriptionOptions;
+};
+
+interface Range {
+    readonly collapsed: boolean;
+    readonly commonAncestorContainer: Node;
+    readonly endContainer: Node;
+    readonly endOffset: number;
+    readonly startContainer: Node;
+    readonly startOffset: number;
+    cloneContents(): DocumentFragment;
+    cloneRange(): Range;
+    collapse(toStart: boolean): void;
+    compareBoundaryPoints(how: number, sourceRange: Range): number;
+    createContextualFragment(fragment: string): DocumentFragment;
+    deleteContents(): void;
+    detach(): void;
+    expand(Unit: ExpandGranularity): boolean;
+    extractContents(): DocumentFragment;
+    getBoundingClientRect(): ClientRect;
+    getClientRects(): ClientRectList;
+    insertNode(newNode: Node): void;
+    selectNode(refNode: Node): void;
+    selectNodeContents(refNode: Node): void;
+    setEnd(refNode: Node, offset: number): void;
+    setEndAfter(refNode: Node): void;
+    setEndBefore(refNode: Node): void;
+    setStart(refNode: Node, offset: number): void;
+    setStartAfter(refNode: Node): void;
+    setStartBefore(refNode: Node): void;
+    surroundContents(newParent: Node): void;
+    toString(): string;
+    readonly END_TO_END: number;
+    readonly END_TO_START: number;
+    readonly START_TO_END: number;
+    readonly START_TO_START: number;
+}
+
+declare var Range: {
+    prototype: Range;
+    new(): Range;
+    readonly END_TO_END: number;
+    readonly END_TO_START: number;
+    readonly START_TO_END: number;
+    readonly START_TO_START: number;
+};
+
+interface ReadableStream {
+    readonly locked: boolean;
+    cancel(): Promise<void>;
+    getReader(): ReadableStreamReader;
+}
+
+declare var ReadableStream: {
+    prototype: ReadableStream;
+    new(): ReadableStream;
+};
+
+interface ReadableStreamReader {
+    cancel(): Promise<void>;
+    read(): Promise<any>;
+    releaseLock(): void;
+}
+
+declare var ReadableStreamReader: {
+    prototype: ReadableStreamReader;
+    new(): ReadableStreamReader;
+};
+
+interface Request extends Object, Body {
+    readonly cache: RequestCache;
+    readonly credentials: RequestCredentials;
+    readonly destination: RequestDestination;
+    readonly headers: Headers;
+    readonly integrity: string;
+    readonly keepalive: boolean;
+    readonly method: string;
+    readonly mode: RequestMode;
+    readonly redirect: RequestRedirect;
+    readonly referrer: string;
+    readonly referrerPolicy: ReferrerPolicy;
+    readonly type: RequestType;
+    readonly url: string;
+    clone(): Request;
+}
+
+declare var Request: {
+    prototype: Request;
+    new(input: Request | string, init?: RequestInit): Request;
+};
+
+interface Response extends Object, Body {
+    readonly body: ReadableStream | null;
+    readonly headers: Headers;
+    readonly ok: boolean;
+    readonly status: number;
+    readonly statusText: string;
+    readonly type: ResponseType;
+    readonly url: string;
+    clone(): Response;
+}
+
+declare var Response: {
+    prototype: Response;
+    new(body?: any, init?: ResponseInit): Response;
+    error: () => Response;
+    redirect: (url: string, status?: number) => Response;
+};
+
+interface RTCDtlsTransportEventMap {
+    "dtlsstatechange": RTCDtlsTransportStateChangedEvent;
+    "error": Event;
+}
+
+interface RTCDtlsTransport extends RTCStatsProvider {
+    ondtlsstatechange: ((this: RTCDtlsTransport, ev: RTCDtlsTransportStateChangedEvent) => any) | null;
+    onerror: ((this: RTCDtlsTransport, ev: Event) => any) | null;
+    readonly state: RTCDtlsTransportState;
+    readonly transport: RTCIceTransport;
+    getLocalParameters(): RTCDtlsParameters;
+    getRemoteCertificates(): ArrayBuffer[];
+    getRemoteParameters(): RTCDtlsParameters | null;
+    start(remoteParameters: RTCDtlsParameters): void;
+    stop(): void;
+    addEventListener<K extends keyof RTCDtlsTransportEventMap>(type: K, listener: (this: RTCDtlsTransport, ev: RTCDtlsTransportEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var RTCDtlsTransport: {
+    prototype: RTCDtlsTransport;
+    new(transport: RTCIceTransport): RTCDtlsTransport;
+};
+
+interface RTCDtlsTransportStateChangedEvent extends Event {
+    readonly state: RTCDtlsTransportState;
+}
+
+declare var RTCDtlsTransportStateChangedEvent: {
+    prototype: RTCDtlsTransportStateChangedEvent;
+    new(): RTCDtlsTransportStateChangedEvent;
+};
+
+interface RTCDtmfSenderEventMap {
+    "tonechange": RTCDTMFToneChangeEvent;
+}
+
+interface RTCDtmfSender extends EventTarget {
+    readonly canInsertDTMF: boolean;
+    readonly duration: number;
+    readonly interToneGap: number;
+    ontonechange: (this: RTCDtmfSender, ev: RTCDTMFToneChangeEvent) => any;
+    readonly sender: RTCRtpSender;
+    readonly toneBuffer: string;
+    insertDTMF(tones: string, duration?: number, interToneGap?: number): void;
+    addEventListener<K extends keyof RTCDtmfSenderEventMap>(type: K, listener: (this: RTCDtmfSender, ev: RTCDtmfSenderEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var RTCDtmfSender: {
+    prototype: RTCDtmfSender;
+    new(sender: RTCRtpSender): RTCDtmfSender;
+};
+
+interface RTCDTMFToneChangeEvent extends Event {
+    readonly tone: string;
+}
+
+declare var RTCDTMFToneChangeEvent: {
+    prototype: RTCDTMFToneChangeEvent;
+    new(typeArg: string, eventInitDict: RTCDTMFToneChangeEventInit): RTCDTMFToneChangeEvent;
+};
+
+interface RTCIceCandidate {
+    candidate: string | null;
+    sdpMid: string | null;
+    sdpMLineIndex: number | null;
+    toJSON(): any;
+}
+
+declare var RTCIceCandidate: {
+    prototype: RTCIceCandidate;
+    new(candidateInitDict?: RTCIceCandidateInit): RTCIceCandidate;
+};
+
+interface RTCIceCandidatePairChangedEvent extends Event {
+    readonly pair: RTCIceCandidatePair;
+}
+
+declare var RTCIceCandidatePairChangedEvent: {
+    prototype: RTCIceCandidatePairChangedEvent;
+    new(): RTCIceCandidatePairChangedEvent;
+};
+
+interface RTCIceGathererEventMap {
+    "error": Event;
+    "localcandidate": RTCIceGathererEvent;
+}
+
+interface RTCIceGatherer extends RTCStatsProvider {
+    readonly component: RTCIceComponent;
+    onerror: ((this: RTCIceGatherer, ev: Event) => any) | null;
+    onlocalcandidate: ((this: RTCIceGatherer, ev: RTCIceGathererEvent) => any) | null;
+    createAssociatedGatherer(): RTCIceGatherer;
+    getLocalCandidates(): RTCIceCandidateDictionary[];
+    getLocalParameters(): RTCIceParameters;
+    addEventListener<K extends keyof RTCIceGathererEventMap>(type: K, listener: (this: RTCIceGatherer, ev: RTCIceGathererEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var RTCIceGatherer: {
+    prototype: RTCIceGatherer;
+    new(options: RTCIceGatherOptions): RTCIceGatherer;
+};
+
+interface RTCIceGathererEvent extends Event {
+    readonly candidate: RTCIceCandidateDictionary | RTCIceCandidateComplete;
+}
+
+declare var RTCIceGathererEvent: {
+    prototype: RTCIceGathererEvent;
+    new(): RTCIceGathererEvent;
+};
+
+interface RTCIceTransportEventMap {
+    "candidatepairchange": RTCIceCandidatePairChangedEvent;
+    "icestatechange": RTCIceTransportStateChangedEvent;
+}
+
+interface RTCIceTransport extends RTCStatsProvider {
+    readonly component: RTCIceComponent;
+    readonly iceGatherer: RTCIceGatherer | null;
+    oncandidatepairchange: ((this: RTCIceTransport, ev: RTCIceCandidatePairChangedEvent) => any) | null;
+    onicestatechange: ((this: RTCIceTransport, ev: RTCIceTransportStateChangedEvent) => any) | null;
+    readonly role: RTCIceRole;
+    readonly state: RTCIceTransportState;
+    addRemoteCandidate(remoteCandidate: RTCIceCandidateDictionary | RTCIceCandidateComplete): void;
+    createAssociatedTransport(): RTCIceTransport;
+    getNominatedCandidatePair(): RTCIceCandidatePair | null;
+    getRemoteCandidates(): RTCIceCandidateDictionary[];
+    getRemoteParameters(): RTCIceParameters | null;
+    setRemoteCandidates(remoteCandidates: RTCIceCandidateDictionary[]): void;
+    start(gatherer: RTCIceGatherer, remoteParameters: RTCIceParameters, role?: RTCIceRole): void;
+    stop(): void;
+    addEventListener<K extends keyof RTCIceTransportEventMap>(type: K, listener: (this: RTCIceTransport, ev: RTCIceTransportEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var RTCIceTransport: {
+    prototype: RTCIceTransport;
+    new(): RTCIceTransport;
+};
+
+interface RTCIceTransportStateChangedEvent extends Event {
+    readonly state: RTCIceTransportState;
+}
+
+declare var RTCIceTransportStateChangedEvent: {
+    prototype: RTCIceTransportStateChangedEvent;
+    new(): RTCIceTransportStateChangedEvent;
+};
+
+interface RTCPeerConnectionEventMap {
+    "addstream": MediaStreamEvent;
+    "icecandidate": RTCPeerConnectionIceEvent;
+    "iceconnectionstatechange": Event;
+    "icegatheringstatechange": Event;
+    "negotiationneeded": Event;
+    "removestream": MediaStreamEvent;
+    "signalingstatechange": Event;
+}
+
+interface RTCPeerConnection extends EventTarget {
+    readonly canTrickleIceCandidates: boolean | null;
+    readonly iceConnectionState: RTCIceConnectionState;
+    readonly iceGatheringState: RTCIceGatheringState;
+    readonly localDescription: RTCSessionDescription | null;
+    onaddstream: (this: RTCPeerConnection, ev: MediaStreamEvent) => any;
+    onicecandidate: (this: RTCPeerConnection, ev: RTCPeerConnectionIceEvent) => any;
+    oniceconnectionstatechange: (this: RTCPeerConnection, ev: Event) => any;
+    onicegatheringstatechange: (this: RTCPeerConnection, ev: Event) => any;
+    onnegotiationneeded: (this: RTCPeerConnection, ev: Event) => any;
+    onremovestream: (this: RTCPeerConnection, ev: MediaStreamEvent) => any;
+    onsignalingstatechange: (this: RTCPeerConnection, ev: Event) => any;
+    readonly remoteDescription: RTCSessionDescription | null;
+    readonly signalingState: RTCSignalingState;
+    addIceCandidate(candidate: RTCIceCandidate, successCallback?: VoidFunction, failureCallback?: RTCPeerConnectionErrorCallback): Promise<void>;
+    addStream(stream: MediaStream): void;
+    close(): void;
+    createAnswer(successCallback?: RTCSessionDescriptionCallback, failureCallback?: RTCPeerConnectionErrorCallback): Promise<RTCSessionDescription>;
+    createOffer(successCallback?: RTCSessionDescriptionCallback, failureCallback?: RTCPeerConnectionErrorCallback, options?: RTCOfferOptions): Promise<RTCSessionDescription>;
+    getConfiguration(): RTCConfiguration;
+    getLocalStreams(): MediaStream[];
+    getRemoteStreams(): MediaStream[];
+    getStats(selector: MediaStreamTrack | null, successCallback?: RTCStatsCallback, failureCallback?: RTCPeerConnectionErrorCallback): Promise<RTCStatsReport>;
+    getStreamById(streamId: string): MediaStream | null;
+    removeStream(stream: MediaStream): void;
+    setLocalDescription(description: RTCSessionDescription, successCallback?: VoidFunction, failureCallback?: RTCPeerConnectionErrorCallback): Promise<void>;
+    setRemoteDescription(description: RTCSessionDescription, successCallback?: VoidFunction, failureCallback?: RTCPeerConnectionErrorCallback): Promise<void>;
+    addEventListener<K extends keyof RTCPeerConnectionEventMap>(type: K, listener: (this: RTCPeerConnection, ev: RTCPeerConnectionEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var RTCPeerConnection: {
+    prototype: RTCPeerConnection;
+    new(configuration: RTCConfiguration): RTCPeerConnection;
+};
+
+interface RTCPeerConnectionIceEvent extends Event {
+    readonly candidate: RTCIceCandidate;
+}
+
+declare var RTCPeerConnectionIceEvent: {
+    prototype: RTCPeerConnectionIceEvent;
+    new(type: string, eventInitDict: RTCPeerConnectionIceEventInit): RTCPeerConnectionIceEvent;
+};
+
+interface RTCRtpReceiverEventMap {
+    "error": Event;
+}
+
+interface RTCRtpReceiver extends RTCStatsProvider {
+    onerror: ((this: RTCRtpReceiver, ev: Event) => any) | null;
+    readonly rtcpTransport: RTCDtlsTransport;
+    readonly track: MediaStreamTrack | null;
+    readonly transport: RTCDtlsTransport | RTCSrtpSdesTransport;
+    getContributingSources(): RTCRtpContributingSource[];
+    receive(parameters: RTCRtpParameters): void;
+    requestSendCSRC(csrc: number): void;
+    setTransport(transport: RTCDtlsTransport | RTCSrtpSdesTransport, rtcpTransport?: RTCDtlsTransport): void;
+    stop(): void;
+    addEventListener<K extends keyof RTCRtpReceiverEventMap>(type: K, listener: (this: RTCRtpReceiver, ev: RTCRtpReceiverEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var RTCRtpReceiver: {
+    prototype: RTCRtpReceiver;
+    new(transport: RTCDtlsTransport | RTCSrtpSdesTransport, kind: string, rtcpTransport?: RTCDtlsTransport): RTCRtpReceiver;
+    getCapabilities(kind?: string): RTCRtpCapabilities;
+};
+
+interface RTCRtpSenderEventMap {
+    "error": Event;
+    "ssrcconflict": RTCSsrcConflictEvent;
+}
+
+interface RTCRtpSender extends RTCStatsProvider {
+    onerror: ((this: RTCRtpSender, ev: Event) => any) | null;
+    onssrcconflict: ((this: RTCRtpSender, ev: RTCSsrcConflictEvent) => any) | null;
+    readonly rtcpTransport: RTCDtlsTransport;
+    readonly track: MediaStreamTrack;
+    readonly transport: RTCDtlsTransport | RTCSrtpSdesTransport;
+    send(parameters: RTCRtpParameters): void;
+    setTrack(track: MediaStreamTrack): void;
+    setTransport(transport: RTCDtlsTransport | RTCSrtpSdesTransport, rtcpTransport?: RTCDtlsTransport): void;
+    stop(): void;
+    addEventListener<K extends keyof RTCRtpSenderEventMap>(type: K, listener: (this: RTCRtpSender, ev: RTCRtpSenderEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var RTCRtpSender: {
+    prototype: RTCRtpSender;
+    new(track: MediaStreamTrack, transport: RTCDtlsTransport | RTCSrtpSdesTransport, rtcpTransport?: RTCDtlsTransport): RTCRtpSender;
+    getCapabilities(kind?: string): RTCRtpCapabilities;
+};
+
+interface RTCSessionDescription {
+    sdp: string | null;
+    type: RTCSdpType | null;
+    toJSON(): any;
+}
+
+declare var RTCSessionDescription: {
+    prototype: RTCSessionDescription;
+    new(descriptionInitDict?: RTCSessionDescriptionInit): RTCSessionDescription;
+};
+
+interface RTCSrtpSdesTransportEventMap {
+    "error": Event;
+}
+
+interface RTCSrtpSdesTransport extends EventTarget {
+    onerror: ((this: RTCSrtpSdesTransport, ev: Event) => any) | null;
+    readonly transport: RTCIceTransport;
+    addEventListener<K extends keyof RTCSrtpSdesTransportEventMap>(type: K, listener: (this: RTCSrtpSdesTransport, ev: RTCSrtpSdesTransportEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var RTCSrtpSdesTransport: {
+    prototype: RTCSrtpSdesTransport;
+    new(transport: RTCIceTransport, encryptParameters: RTCSrtpSdesParameters, decryptParameters: RTCSrtpSdesParameters): RTCSrtpSdesTransport;
+    getLocalParameters(): RTCSrtpSdesParameters[];
+};
+
+interface RTCSsrcConflictEvent extends Event {
+    readonly ssrc: number;
+}
+
+declare var RTCSsrcConflictEvent: {
+    prototype: RTCSsrcConflictEvent;
+    new(): RTCSsrcConflictEvent;
+};
+
+interface RTCStatsProvider extends EventTarget {
+    getStats(): Promise<RTCStatsReport>;
+    msGetStats(): Promise<RTCStatsReport>;
+}
+
+declare var RTCStatsProvider: {
+    prototype: RTCStatsProvider;
+    new(): RTCStatsProvider;
+};
+
+interface ScopedCredential {
+    readonly id: ArrayBuffer;
+    readonly type: ScopedCredentialType;
+}
+
+declare var ScopedCredential: {
+    prototype: ScopedCredential;
+    new(): ScopedCredential;
+};
+
+interface ScopedCredentialInfo {
+    readonly credential: ScopedCredential;
+    readonly publicKey: CryptoKey;
+}
+
+declare var ScopedCredentialInfo: {
+    prototype: ScopedCredentialInfo;
+    new(): ScopedCredentialInfo;
+};
+
+interface ScreenEventMap {
+    "MSOrientationChange": Event;
+}
+
+interface Screen extends EventTarget {
+    readonly availHeight: number;
+    readonly availWidth: number;
+    bufferDepth: number;
+    readonly colorDepth: number;
+    readonly deviceXDPI: number;
+    readonly deviceYDPI: number;
+    readonly fontSmoothingEnabled: boolean;
+    readonly height: number;
+    readonly logicalXDPI: number;
+    readonly logicalYDPI: number;
+    readonly msOrientation: string;
+    onmsorientationchange: (this: Screen, ev: Event) => any;
+    readonly pixelDepth: number;
+    readonly systemXDPI: number;
+    readonly systemYDPI: number;
+    readonly width: number;
+    msLockOrientation(orientations: string | string[]): boolean;
+    msUnlockOrientation(): void;
+    addEventListener<K extends keyof ScreenEventMap>(type: K, listener: (this: Screen, ev: ScreenEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var Screen: {
+    prototype: Screen;
+    new(): Screen;
+};
+
+interface ScriptNotifyEvent extends Event {
+    readonly callingUri: string;
+    readonly value: string;
+}
+
+declare var ScriptNotifyEvent: {
+    prototype: ScriptNotifyEvent;
+    new(): ScriptNotifyEvent;
+};
+
+interface ScriptProcessorNodeEventMap {
+    "audioprocess": AudioProcessingEvent;
+}
+
+interface ScriptProcessorNode extends AudioNode {
+    readonly bufferSize: number;
+    onaudioprocess: (this: ScriptProcessorNode, ev: AudioProcessingEvent) => any;
+    addEventListener<K extends keyof ScriptProcessorNodeEventMap>(type: K, listener: (this: ScriptProcessorNode, ev: ScriptProcessorNodeEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var ScriptProcessorNode: {
+    prototype: ScriptProcessorNode;
+    new(): ScriptProcessorNode;
+};
+
+interface Selection {
+    readonly anchorNode: Node;
+    readonly anchorOffset: number;
+    readonly baseNode: Node;
+    readonly baseOffset: number;
+    readonly extentNode: Node;
+    readonly extentOffset: number;
+    readonly focusNode: Node;
+    readonly focusOffset: number;
+    readonly isCollapsed: boolean;
+    readonly rangeCount: number;
+    readonly type: string;
+    addRange(range: Range): void;
+    collapse(parentNode: Node, offset: number): void;
+    collapseToEnd(): void;
+    collapseToStart(): void;
+    containsNode(node: Node, partlyContained: boolean): boolean;
+    deleteFromDocument(): void;
+    empty(): void;
+    extend(newNode: Node, offset: number): void;
+    getRangeAt(index: number): Range;
+    removeAllRanges(): void;
+    removeRange(range: Range): void;
+    selectAllChildren(parentNode: Node): void;
+    setBaseAndExtent(baseNode: Node, baseOffset: number, extentNode: Node, extentOffset: number): void;
+    setPosition(parentNode: Node, offset: number): void;
+    toString(): string;
+}
+
+declare var Selection: {
+    prototype: Selection;
+    new(): Selection;
+};
+
+interface ServiceWorkerEventMap extends AbstractWorkerEventMap {
+    "statechange": Event;
+}
+
+interface ServiceWorker extends EventTarget, AbstractWorker {
+    onstatechange: (this: ServiceWorker, ev: Event) => any;
+    readonly scriptURL: USVString;
+    readonly state: ServiceWorkerState;
+    postMessage(message: any, transfer?: any[]): void;
+    addEventListener<K extends keyof ServiceWorkerEventMap>(type: K, listener: (this: ServiceWorker, ev: ServiceWorkerEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var ServiceWorker: {
+    prototype: ServiceWorker;
+    new(): ServiceWorker;
+};
+
+interface ServiceWorkerContainerEventMap {
+    "controllerchange": Event;
+    "message": ServiceWorkerMessageEvent;
+}
+
+interface ServiceWorkerContainer extends EventTarget {
+    readonly controller: ServiceWorker | null;
+    oncontrollerchange: (this: ServiceWorkerContainer, ev: Event) => any;
+    onmessage: (this: ServiceWorkerContainer, ev: ServiceWorkerMessageEvent) => any;
+    readonly ready: Promise<ServiceWorkerRegistration>;
+    getRegistration(clientURL?: USVString): Promise<any>;
+    getRegistrations(): any;
+    register(scriptURL: USVString, options?: RegistrationOptions): Promise<ServiceWorkerRegistration>;
+    addEventListener<K extends keyof ServiceWorkerContainerEventMap>(type: K, listener: (this: ServiceWorkerContainer, ev: ServiceWorkerContainerEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var ServiceWorkerContainer: {
+    prototype: ServiceWorkerContainer;
+    new(): ServiceWorkerContainer;
+};
+
+interface ServiceWorkerMessageEvent extends Event {
+    readonly data: any;
+    readonly lastEventId: string;
+    readonly origin: string;
+    readonly ports: MessagePort[] | null;
+    readonly source: ServiceWorker | MessagePort | null;
+}
+
+declare var ServiceWorkerMessageEvent: {
+    prototype: ServiceWorkerMessageEvent;
+    new(type: string, eventInitDict?: ServiceWorkerMessageEventInit): ServiceWorkerMessageEvent;
+};
+
+interface ServiceWorkerRegistrationEventMap {
+    "updatefound": Event;
+}
+
+interface ServiceWorkerRegistration extends EventTarget {
+    readonly active: ServiceWorker | null;
+    readonly installing: ServiceWorker | null;
+    onupdatefound: (this: ServiceWorkerRegistration, ev: Event) => any;
+    readonly pushManager: PushManager;
+    readonly scope: USVString;
+    readonly sync: SyncManager;
+    readonly waiting: ServiceWorker | null;
+    getNotifications(filter?: GetNotificationOptions): any;
+    showNotification(title: string, options?: NotificationOptions): Promise<void>;
+    unregister(): Promise<boolean>;
+    update(): Promise<void>;
+    addEventListener<K extends keyof ServiceWorkerRegistrationEventMap>(type: K, listener: (this: ServiceWorkerRegistration, ev: ServiceWorkerRegistrationEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var ServiceWorkerRegistration: {
+    prototype: ServiceWorkerRegistration;
+    new(): ServiceWorkerRegistration;
+};
+
+interface SourceBuffer extends EventTarget {
+    appendWindowEnd: number;
+    appendWindowStart: number;
+    readonly audioTracks: AudioTrackList;
+    readonly buffered: TimeRanges;
+    mode: AppendMode;
+    timestampOffset: number;
+    readonly updating: boolean;
+    readonly videoTracks: VideoTrackList;
+    abort(): void;
+    appendBuffer(data: ArrayBuffer | ArrayBufferView): void;
+    appendStream(stream: MSStream, maxSize?: number): void;
+    remove(start: number, end: number): void;
+}
+
+declare var SourceBuffer: {
+    prototype: SourceBuffer;
+    new(): SourceBuffer;
+};
+
+interface SourceBufferList extends EventTarget {
+    readonly length: number;
+    item(index: number): SourceBuffer;
+    [index: number]: SourceBuffer;
+}
+
+declare var SourceBufferList: {
+    prototype: SourceBufferList;
+    new(): SourceBufferList;
+};
+
+interface SpeechSynthesisEventMap {
+    "voiceschanged": Event;
+}
+
+interface SpeechSynthesis extends EventTarget {
+    onvoiceschanged: (this: SpeechSynthesis, ev: Event) => any;
+    readonly paused: boolean;
+    readonly pending: boolean;
+    readonly speaking: boolean;
+    cancel(): void;
+    getVoices(): SpeechSynthesisVoice[];
+    pause(): void;
+    resume(): void;
+    speak(utterance: SpeechSynthesisUtterance): void;
+    addEventListener<K extends keyof SpeechSynthesisEventMap>(type: K, listener: (this: SpeechSynthesis, ev: SpeechSynthesisEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SpeechSynthesis: {
+    prototype: SpeechSynthesis;
+    new(): SpeechSynthesis;
+};
+
+interface SpeechSynthesisEvent extends Event {
+    readonly charIndex: number;
+    readonly elapsedTime: number;
+    readonly name: string;
+    readonly utterance: SpeechSynthesisUtterance | null;
+}
+
+declare var SpeechSynthesisEvent: {
+    prototype: SpeechSynthesisEvent;
+    new(type: string, eventInitDict?: SpeechSynthesisEventInit): SpeechSynthesisEvent;
+};
+
+interface SpeechSynthesisUtteranceEventMap {
+    "boundary": Event;
+    "end": Event;
+    "error": Event;
+    "mark": Event;
+    "pause": Event;
+    "resume": Event;
+    "start": Event;
+}
+
+interface SpeechSynthesisUtterance extends EventTarget {
+    lang: string;
+    onboundary: (this: SpeechSynthesisUtterance, ev: Event) => any;
+    onend: (this: SpeechSynthesisUtterance, ev: Event) => any;
+    onerror: (this: SpeechSynthesisUtterance, ev: Event) => any;
+    onmark: (this: SpeechSynthesisUtterance, ev: Event) => any;
+    onpause: (this: SpeechSynthesisUtterance, ev: Event) => any;
+    onresume: (this: SpeechSynthesisUtterance, ev: Event) => any;
+    onstart: (this: SpeechSynthesisUtterance, ev: Event) => any;
+    pitch: number;
+    rate: number;
+    text: string;
+    voice: SpeechSynthesisVoice;
+    volume: number;
+    addEventListener<K extends keyof SpeechSynthesisUtteranceEventMap>(type: K, listener: (this: SpeechSynthesisUtterance, ev: SpeechSynthesisUtteranceEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SpeechSynthesisUtterance: {
+    prototype: SpeechSynthesisUtterance;
+    new(text?: string): SpeechSynthesisUtterance;
+};
+
+interface SpeechSynthesisVoice {
+    readonly default: boolean;
+    readonly lang: string;
+    readonly localService: boolean;
+    readonly name: string;
+    readonly voiceURI: string;
+}
+
+declare var SpeechSynthesisVoice: {
+    prototype: SpeechSynthesisVoice;
+    new(): SpeechSynthesisVoice;
+};
+
+interface StereoPannerNode extends AudioNode {
+    readonly pan: AudioParam;
+}
+
+declare var StereoPannerNode: {
+    prototype: StereoPannerNode;
+    new(): StereoPannerNode;
+};
+
+interface Storage {
+    readonly length: number;
+    clear(): void;
+    getItem(key: string): string | null;
+    key(index: number): string | null;
+    removeItem(key: string): void;
+    setItem(key: string, data: string): void;
+    [key: string]: any;
+    [index: number]: string;
+}
+
+declare var Storage: {
+    prototype: Storage;
+    new(): Storage;
+};
+
+interface StorageEvent extends Event {
+    readonly url: string;
+    key?: string;
+    oldValue?: string;
+    newValue?: string;
+    storageArea?: Storage;
+}
+
+declare var StorageEvent: {
+    prototype: StorageEvent;
+    new (type: string, eventInitDict?: StorageEventInit): StorageEvent;
+};
+
+interface StyleMedia {
+    readonly type: string;
+    matchMedium(mediaquery: string): boolean;
+}
+
+declare var StyleMedia: {
+    prototype: StyleMedia;
+    new(): StyleMedia;
+};
+
+interface StyleSheet {
+    disabled: boolean;
+    readonly href: string;
+    readonly media: MediaList;
+    readonly ownerNode: Node;
+    readonly parentStyleSheet: StyleSheet;
+    readonly title: string;
+    readonly type: string;
+}
+
+declare var StyleSheet: {
+    prototype: StyleSheet;
+    new(): StyleSheet;
+};
+
+interface StyleSheetList {
+    readonly length: number;
+    item(index?: number): StyleSheet;
+    [index: number]: StyleSheet;
+}
+
+declare var StyleSheetList: {
+    prototype: StyleSheetList;
+    new(): StyleSheetList;
+};
+
+interface StyleSheetPageList {
+    readonly length: number;
+    item(index: number): CSSPageRule;
+    [index: number]: CSSPageRule;
+}
+
+declare var StyleSheetPageList: {
+    prototype: StyleSheetPageList;
+    new(): StyleSheetPageList;
+};
+
+interface SubtleCrypto {
+    decrypt(algorithm: string | RsaOaepParams | AesCtrParams | AesCbcParams | AesCmacParams | AesGcmParams | AesCfbParams, key: CryptoKey, data: BufferSource): PromiseLike<ArrayBuffer>;
+    deriveBits(algorithm: string | EcdhKeyDeriveParams | DhKeyDeriveParams | ConcatParams | HkdfCtrParams | Pbkdf2Params, baseKey: CryptoKey, length: number): PromiseLike<ArrayBuffer>;
+    deriveKey(algorithm: string | EcdhKeyDeriveParams | DhKeyDeriveParams | ConcatParams | HkdfCtrParams | Pbkdf2Params, baseKey: CryptoKey, derivedKeyType: string | AesDerivedKeyParams | HmacImportParams | ConcatParams | HkdfCtrParams | Pbkdf2Params, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
+    digest(algorithm: AlgorithmIdentifier, data: BufferSource): PromiseLike<ArrayBuffer>;
+    encrypt(algorithm: string | RsaOaepParams | AesCtrParams | AesCbcParams | AesCmacParams | AesGcmParams | AesCfbParams, key: CryptoKey, data: BufferSource): PromiseLike<ArrayBuffer>;
+    exportKey(format: "jwk", key: CryptoKey): PromiseLike<JsonWebKey>;
+    exportKey(format: "raw" | "pkcs8" | "spki", key: CryptoKey): PromiseLike<ArrayBuffer>;
+    exportKey(format: string, key: CryptoKey): PromiseLike<JsonWebKey | ArrayBuffer>;
+    generateKey(algorithm: string, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKeyPair | CryptoKey>;
+    generateKey(algorithm: RsaHashedKeyGenParams | EcKeyGenParams | DhKeyGenParams, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKeyPair>;
+    generateKey(algorithm: AesKeyGenParams | HmacKeyGenParams | Pbkdf2Params, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
+    importKey(format: "jwk", keyData: JsonWebKey, algorithm: string | RsaHashedImportParams | EcKeyImportParams | HmacImportParams | DhImportKeyParams, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
+    importKey(format: "raw" | "pkcs8" | "spki", keyData: BufferSource, algorithm: string | RsaHashedImportParams | EcKeyImportParams | HmacImportParams | DhImportKeyParams, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
+    importKey(format: string, keyData: JsonWebKey | BufferSource, algorithm: string | RsaHashedImportParams | EcKeyImportParams | HmacImportParams | DhImportKeyParams, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
+    sign(algorithm: string | RsaPssParams | EcdsaParams | AesCmacParams, key: CryptoKey, data: BufferSource): PromiseLike<ArrayBuffer>;
+    unwrapKey(format: string, wrappedKey: BufferSource, unwrappingKey: CryptoKey, unwrapAlgorithm: AlgorithmIdentifier, unwrappedKeyAlgorithm: AlgorithmIdentifier, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
+    verify(algorithm: string | RsaPssParams | EcdsaParams | AesCmacParams, key: CryptoKey, signature: BufferSource, data: BufferSource): PromiseLike<boolean>;
+    wrapKey(format: string, key: CryptoKey, wrappingKey: CryptoKey, wrapAlgorithm: AlgorithmIdentifier): PromiseLike<ArrayBuffer>;
+}
+
+declare var SubtleCrypto: {
+    prototype: SubtleCrypto;
+    new(): SubtleCrypto;
+};
+
+interface SVGAElement extends SVGGraphicsElement, SVGURIReference {
+    readonly target: SVGAnimatedString;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGAElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGAElement: {
+    prototype: SVGAElement;
+    new(): SVGAElement;
+};
+
+interface SVGAngle {
+    readonly unitType: number;
+    value: number;
+    valueAsString: string;
+    valueInSpecifiedUnits: number;
+    convertToSpecifiedUnits(unitType: number): void;
+    newValueSpecifiedUnits(unitType: number, valueInSpecifiedUnits: number): void;
+    readonly SVG_ANGLETYPE_DEG: number;
+    readonly SVG_ANGLETYPE_GRAD: number;
+    readonly SVG_ANGLETYPE_RAD: number;
+    readonly SVG_ANGLETYPE_UNKNOWN: number;
+    readonly SVG_ANGLETYPE_UNSPECIFIED: number;
+}
+
+declare var SVGAngle: {
+    prototype: SVGAngle;
+    new(): SVGAngle;
+    readonly SVG_ANGLETYPE_DEG: number;
+    readonly SVG_ANGLETYPE_GRAD: number;
+    readonly SVG_ANGLETYPE_RAD: number;
+    readonly SVG_ANGLETYPE_UNKNOWN: number;
+    readonly SVG_ANGLETYPE_UNSPECIFIED: number;
+};
+
+interface SVGAnimatedAngle {
+    readonly animVal: SVGAngle;
+    readonly baseVal: SVGAngle;
+}
+
+declare var SVGAnimatedAngle: {
+    prototype: SVGAnimatedAngle;
+    new(): SVGAnimatedAngle;
+};
+
+interface SVGAnimatedBoolean {
+    readonly animVal: boolean;
+    baseVal: boolean;
+}
+
+declare var SVGAnimatedBoolean: {
+    prototype: SVGAnimatedBoolean;
+    new(): SVGAnimatedBoolean;
+};
+
+interface SVGAnimatedEnumeration {
+    readonly animVal: number;
+    baseVal: number;
+}
+
+declare var SVGAnimatedEnumeration: {
+    prototype: SVGAnimatedEnumeration;
+    new(): SVGAnimatedEnumeration;
+};
+
+interface SVGAnimatedInteger {
+    readonly animVal: number;
+    baseVal: number;
+}
+
+declare var SVGAnimatedInteger: {
+    prototype: SVGAnimatedInteger;
+    new(): SVGAnimatedInteger;
+};
+
+interface SVGAnimatedLength {
+    readonly animVal: SVGLength;
+    readonly baseVal: SVGLength;
+}
+
+declare var SVGAnimatedLength: {
+    prototype: SVGAnimatedLength;
+    new(): SVGAnimatedLength;
+};
+
+interface SVGAnimatedLengthList {
+    readonly animVal: SVGLengthList;
+    readonly baseVal: SVGLengthList;
+}
+
+declare var SVGAnimatedLengthList: {
+    prototype: SVGAnimatedLengthList;
+    new(): SVGAnimatedLengthList;
+};
+
+interface SVGAnimatedNumber {
+    readonly animVal: number;
+    baseVal: number;
+}
+
+declare var SVGAnimatedNumber: {
+    prototype: SVGAnimatedNumber;
+    new(): SVGAnimatedNumber;
+};
+
+interface SVGAnimatedNumberList {
+    readonly animVal: SVGNumberList;
+    readonly baseVal: SVGNumberList;
+}
+
+declare var SVGAnimatedNumberList: {
+    prototype: SVGAnimatedNumberList;
+    new(): SVGAnimatedNumberList;
+};
+
+interface SVGAnimatedPreserveAspectRatio {
+    readonly animVal: SVGPreserveAspectRatio;
+    readonly baseVal: SVGPreserveAspectRatio;
+}
+
+declare var SVGAnimatedPreserveAspectRatio: {
+    prototype: SVGAnimatedPreserveAspectRatio;
+    new(): SVGAnimatedPreserveAspectRatio;
+};
+
+interface SVGAnimatedRect {
+    readonly animVal: SVGRect;
+    readonly baseVal: SVGRect;
+}
+
+declare var SVGAnimatedRect: {
+    prototype: SVGAnimatedRect;
+    new(): SVGAnimatedRect;
+};
+
+interface SVGAnimatedString {
+    readonly animVal: string;
+    baseVal: string;
+}
+
+declare var SVGAnimatedString: {
+    prototype: SVGAnimatedString;
+    new(): SVGAnimatedString;
+};
+
+interface SVGAnimatedTransformList {
+    readonly animVal: SVGTransformList;
+    readonly baseVal: SVGTransformList;
+}
+
+declare var SVGAnimatedTransformList: {
+    prototype: SVGAnimatedTransformList;
+    new(): SVGAnimatedTransformList;
+};
+
+interface SVGCircleElement extends SVGGraphicsElement {
+    readonly cx: SVGAnimatedLength;
+    readonly cy: SVGAnimatedLength;
+    readonly r: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGCircleElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGCircleElement: {
+    prototype: SVGCircleElement;
+    new(): SVGCircleElement;
+};
+
+interface SVGClipPathElement extends SVGGraphicsElement, SVGUnitTypes {
+    readonly clipPathUnits: SVGAnimatedEnumeration;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGClipPathElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGClipPathElement: {
+    prototype: SVGClipPathElement;
+    new(): SVGClipPathElement;
+};
+
+interface SVGComponentTransferFunctionElement extends SVGElement {
+    readonly amplitude: SVGAnimatedNumber;
+    readonly exponent: SVGAnimatedNumber;
+    readonly intercept: SVGAnimatedNumber;
+    readonly offset: SVGAnimatedNumber;
+    readonly slope: SVGAnimatedNumber;
+    readonly tableValues: SVGAnimatedNumberList;
+    readonly type: SVGAnimatedEnumeration;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_DISCRETE: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_GAMMA: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_IDENTITY: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_LINEAR: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_TABLE: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGComponentTransferFunctionElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGComponentTransferFunctionElement: {
+    prototype: SVGComponentTransferFunctionElement;
+    new(): SVGComponentTransferFunctionElement;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_DISCRETE: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_GAMMA: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_IDENTITY: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_LINEAR: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_TABLE: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_UNKNOWN: number;
+};
+
+interface SVGDefsElement extends SVGGraphicsElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGDefsElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGDefsElement: {
+    prototype: SVGDefsElement;
+    new(): SVGDefsElement;
+};
+
+interface SVGDescElement extends SVGElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGDescElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGDescElement: {
+    prototype: SVGDescElement;
+    new(): SVGDescElement;
+};
+
+interface SVGElementEventMap extends ElementEventMap {
+    "click": MouseEvent;
+    "dblclick": MouseEvent;
+    "focusin": FocusEvent;
+    "focusout": FocusEvent;
+    "load": Event;
+    "mousedown": MouseEvent;
+    "mousemove": MouseEvent;
+    "mouseout": MouseEvent;
+    "mouseover": MouseEvent;
+    "mouseup": MouseEvent;
+}
+
+interface SVGElement extends Element {
+    className: any;
+    onclick: (this: SVGElement, ev: MouseEvent) => any;
+    ondblclick: (this: SVGElement, ev: MouseEvent) => any;
+    onfocusin: (this: SVGElement, ev: FocusEvent) => any;
+    onfocusout: (this: SVGElement, ev: FocusEvent) => any;
+    onload: (this: SVGElement, ev: Event) => any;
+    onmousedown: (this: SVGElement, ev: MouseEvent) => any;
+    onmousemove: (this: SVGElement, ev: MouseEvent) => any;
+    onmouseout: (this: SVGElement, ev: MouseEvent) => any;
+    onmouseover: (this: SVGElement, ev: MouseEvent) => any;
+    onmouseup: (this: SVGElement, ev: MouseEvent) => any;
+    readonly ownerSVGElement: SVGSVGElement;
+    readonly style: CSSStyleDeclaration;
+    readonly viewportElement: SVGElement;
+    xmlbase: string;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGElement: {
+    prototype: SVGElement;
+    new(): SVGElement;
+};
+
+interface SVGElementInstance extends EventTarget {
+    readonly childNodes: SVGElementInstanceList;
+    readonly correspondingElement: SVGElement;
+    readonly correspondingUseElement: SVGUseElement;
+    readonly firstChild: SVGElementInstance;
+    readonly lastChild: SVGElementInstance;
+    readonly nextSibling: SVGElementInstance;
+    readonly parentNode: SVGElementInstance;
+    readonly previousSibling: SVGElementInstance;
+}
+
+declare var SVGElementInstance: {
+    prototype: SVGElementInstance;
+    new(): SVGElementInstance;
+};
+
+interface SVGElementInstanceList {
+    readonly length: number;
+    item(index: number): SVGElementInstance;
+}
+
+declare var SVGElementInstanceList: {
+    prototype: SVGElementInstanceList;
+    new(): SVGElementInstanceList;
+};
+
+interface SVGEllipseElement extends SVGGraphicsElement {
+    readonly cx: SVGAnimatedLength;
+    readonly cy: SVGAnimatedLength;
+    readonly rx: SVGAnimatedLength;
+    readonly ry: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGEllipseElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGEllipseElement: {
+    prototype: SVGEllipseElement;
+    new(): SVGEllipseElement;
+};
+
+interface SVGFEBlendElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    readonly in2: SVGAnimatedString;
+    readonly mode: SVGAnimatedEnumeration;
+    readonly SVG_FEBLEND_MODE_COLOR: number;
+    readonly SVG_FEBLEND_MODE_COLOR_BURN: number;
+    readonly SVG_FEBLEND_MODE_COLOR_DODGE: number;
+    readonly SVG_FEBLEND_MODE_DARKEN: number;
+    readonly SVG_FEBLEND_MODE_DIFFERENCE: number;
+    readonly SVG_FEBLEND_MODE_EXCLUSION: number;
+    readonly SVG_FEBLEND_MODE_HARD_LIGHT: number;
+    readonly SVG_FEBLEND_MODE_HUE: number;
+    readonly SVG_FEBLEND_MODE_LIGHTEN: number;
+    readonly SVG_FEBLEND_MODE_LUMINOSITY: number;
+    readonly SVG_FEBLEND_MODE_MULTIPLY: number;
+    readonly SVG_FEBLEND_MODE_NORMAL: number;
+    readonly SVG_FEBLEND_MODE_OVERLAY: number;
+    readonly SVG_FEBLEND_MODE_SATURATION: number;
+    readonly SVG_FEBLEND_MODE_SCREEN: number;
+    readonly SVG_FEBLEND_MODE_SOFT_LIGHT: number;
+    readonly SVG_FEBLEND_MODE_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEBlendElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEBlendElement: {
+    prototype: SVGFEBlendElement;
+    new(): SVGFEBlendElement;
+    readonly SVG_FEBLEND_MODE_COLOR: number;
+    readonly SVG_FEBLEND_MODE_COLOR_BURN: number;
+    readonly SVG_FEBLEND_MODE_COLOR_DODGE: number;
+    readonly SVG_FEBLEND_MODE_DARKEN: number;
+    readonly SVG_FEBLEND_MODE_DIFFERENCE: number;
+    readonly SVG_FEBLEND_MODE_EXCLUSION: number;
+    readonly SVG_FEBLEND_MODE_HARD_LIGHT: number;
+    readonly SVG_FEBLEND_MODE_HUE: number;
+    readonly SVG_FEBLEND_MODE_LIGHTEN: number;
+    readonly SVG_FEBLEND_MODE_LUMINOSITY: number;
+    readonly SVG_FEBLEND_MODE_MULTIPLY: number;
+    readonly SVG_FEBLEND_MODE_NORMAL: number;
+    readonly SVG_FEBLEND_MODE_OVERLAY: number;
+    readonly SVG_FEBLEND_MODE_SATURATION: number;
+    readonly SVG_FEBLEND_MODE_SCREEN: number;
+    readonly SVG_FEBLEND_MODE_SOFT_LIGHT: number;
+    readonly SVG_FEBLEND_MODE_UNKNOWN: number;
+};
+
+interface SVGFEColorMatrixElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    readonly type: SVGAnimatedEnumeration;
+    readonly values: SVGAnimatedNumberList;
+    readonly SVG_FECOLORMATRIX_TYPE_HUEROTATE: number;
+    readonly SVG_FECOLORMATRIX_TYPE_LUMINANCETOALPHA: number;
+    readonly SVG_FECOLORMATRIX_TYPE_MATRIX: number;
+    readonly SVG_FECOLORMATRIX_TYPE_SATURATE: number;
+    readonly SVG_FECOLORMATRIX_TYPE_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEColorMatrixElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEColorMatrixElement: {
+    prototype: SVGFEColorMatrixElement;
+    new(): SVGFEColorMatrixElement;
+    readonly SVG_FECOLORMATRIX_TYPE_HUEROTATE: number;
+    readonly SVG_FECOLORMATRIX_TYPE_LUMINANCETOALPHA: number;
+    readonly SVG_FECOLORMATRIX_TYPE_MATRIX: number;
+    readonly SVG_FECOLORMATRIX_TYPE_SATURATE: number;
+    readonly SVG_FECOLORMATRIX_TYPE_UNKNOWN: number;
+};
+
+interface SVGFEComponentTransferElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEComponentTransferElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEComponentTransferElement: {
+    prototype: SVGFEComponentTransferElement;
+    new(): SVGFEComponentTransferElement;
+};
+
+interface SVGFECompositeElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    readonly in2: SVGAnimatedString;
+    readonly k1: SVGAnimatedNumber;
+    readonly k2: SVGAnimatedNumber;
+    readonly k3: SVGAnimatedNumber;
+    readonly k4: SVGAnimatedNumber;
+    readonly operator: SVGAnimatedEnumeration;
+    readonly SVG_FECOMPOSITE_OPERATOR_ARITHMETIC: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_ATOP: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_IN: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_OUT: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_OVER: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_UNKNOWN: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_XOR: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFECompositeElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFECompositeElement: {
+    prototype: SVGFECompositeElement;
+    new(): SVGFECompositeElement;
+    readonly SVG_FECOMPOSITE_OPERATOR_ARITHMETIC: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_ATOP: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_IN: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_OUT: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_OVER: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_UNKNOWN: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_XOR: number;
+};
+
+interface SVGFEConvolveMatrixElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly bias: SVGAnimatedNumber;
+    readonly divisor: SVGAnimatedNumber;
+    readonly edgeMode: SVGAnimatedEnumeration;
+    readonly in1: SVGAnimatedString;
+    readonly kernelMatrix: SVGAnimatedNumberList;
+    readonly kernelUnitLengthX: SVGAnimatedNumber;
+    readonly kernelUnitLengthY: SVGAnimatedNumber;
+    readonly orderX: SVGAnimatedInteger;
+    readonly orderY: SVGAnimatedInteger;
+    readonly preserveAlpha: SVGAnimatedBoolean;
+    readonly targetX: SVGAnimatedInteger;
+    readonly targetY: SVGAnimatedInteger;
+    readonly SVG_EDGEMODE_DUPLICATE: number;
+    readonly SVG_EDGEMODE_NONE: number;
+    readonly SVG_EDGEMODE_UNKNOWN: number;
+    readonly SVG_EDGEMODE_WRAP: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEConvolveMatrixElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEConvolveMatrixElement: {
+    prototype: SVGFEConvolveMatrixElement;
+    new(): SVGFEConvolveMatrixElement;
+    readonly SVG_EDGEMODE_DUPLICATE: number;
+    readonly SVG_EDGEMODE_NONE: number;
+    readonly SVG_EDGEMODE_UNKNOWN: number;
+    readonly SVG_EDGEMODE_WRAP: number;
+};
+
+interface SVGFEDiffuseLightingElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly diffuseConstant: SVGAnimatedNumber;
+    readonly in1: SVGAnimatedString;
+    readonly kernelUnitLengthX: SVGAnimatedNumber;
+    readonly kernelUnitLengthY: SVGAnimatedNumber;
+    readonly surfaceScale: SVGAnimatedNumber;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEDiffuseLightingElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEDiffuseLightingElement: {
+    prototype: SVGFEDiffuseLightingElement;
+    new(): SVGFEDiffuseLightingElement;
+};
+
+interface SVGFEDisplacementMapElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    readonly in2: SVGAnimatedString;
+    readonly scale: SVGAnimatedNumber;
+    readonly xChannelSelector: SVGAnimatedEnumeration;
+    readonly yChannelSelector: SVGAnimatedEnumeration;
+    readonly SVG_CHANNEL_A: number;
+    readonly SVG_CHANNEL_B: number;
+    readonly SVG_CHANNEL_G: number;
+    readonly SVG_CHANNEL_R: number;
+    readonly SVG_CHANNEL_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEDisplacementMapElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEDisplacementMapElement: {
+    prototype: SVGFEDisplacementMapElement;
+    new(): SVGFEDisplacementMapElement;
+    readonly SVG_CHANNEL_A: number;
+    readonly SVG_CHANNEL_B: number;
+    readonly SVG_CHANNEL_G: number;
+    readonly SVG_CHANNEL_R: number;
+    readonly SVG_CHANNEL_UNKNOWN: number;
+};
+
+interface SVGFEDistantLightElement extends SVGElement {
+    readonly azimuth: SVGAnimatedNumber;
+    readonly elevation: SVGAnimatedNumber;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEDistantLightElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEDistantLightElement: {
+    prototype: SVGFEDistantLightElement;
+    new(): SVGFEDistantLightElement;
+};
+
+interface SVGFEFloodElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEFloodElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEFloodElement: {
+    prototype: SVGFEFloodElement;
+    new(): SVGFEFloodElement;
+};
+
+interface SVGFEFuncAElement extends SVGComponentTransferFunctionElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEFuncAElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEFuncAElement: {
+    prototype: SVGFEFuncAElement;
+    new(): SVGFEFuncAElement;
+};
+
+interface SVGFEFuncBElement extends SVGComponentTransferFunctionElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEFuncBElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEFuncBElement: {
+    prototype: SVGFEFuncBElement;
+    new(): SVGFEFuncBElement;
+};
+
+interface SVGFEFuncGElement extends SVGComponentTransferFunctionElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEFuncGElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEFuncGElement: {
+    prototype: SVGFEFuncGElement;
+    new(): SVGFEFuncGElement;
+};
+
+interface SVGFEFuncRElement extends SVGComponentTransferFunctionElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEFuncRElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEFuncRElement: {
+    prototype: SVGFEFuncRElement;
+    new(): SVGFEFuncRElement;
+};
+
+interface SVGFEGaussianBlurElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    readonly stdDeviationX: SVGAnimatedNumber;
+    readonly stdDeviationY: SVGAnimatedNumber;
+    setStdDeviation(stdDeviationX: number, stdDeviationY: number): void;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEGaussianBlurElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEGaussianBlurElement: {
+    prototype: SVGFEGaussianBlurElement;
+    new(): SVGFEGaussianBlurElement;
+};
+
+interface SVGFEImageElement extends SVGElement, SVGFilterPrimitiveStandardAttributes, SVGURIReference {
+    readonly preserveAspectRatio: SVGAnimatedPreserveAspectRatio;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEImageElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEImageElement: {
+    prototype: SVGFEImageElement;
+    new(): SVGFEImageElement;
+};
+
+interface SVGFEMergeElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEMergeElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEMergeElement: {
+    prototype: SVGFEMergeElement;
+    new(): SVGFEMergeElement;
+};
+
+interface SVGFEMergeNodeElement extends SVGElement {
+    readonly in1: SVGAnimatedString;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEMergeNodeElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEMergeNodeElement: {
+    prototype: SVGFEMergeNodeElement;
+    new(): SVGFEMergeNodeElement;
+};
+
+interface SVGFEMorphologyElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    readonly operator: SVGAnimatedEnumeration;
+    readonly radiusX: SVGAnimatedNumber;
+    readonly radiusY: SVGAnimatedNumber;
+    readonly SVG_MORPHOLOGY_OPERATOR_DILATE: number;
+    readonly SVG_MORPHOLOGY_OPERATOR_ERODE: number;
+    readonly SVG_MORPHOLOGY_OPERATOR_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEMorphologyElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEMorphologyElement: {
+    prototype: SVGFEMorphologyElement;
+    new(): SVGFEMorphologyElement;
+    readonly SVG_MORPHOLOGY_OPERATOR_DILATE: number;
+    readonly SVG_MORPHOLOGY_OPERATOR_ERODE: number;
+    readonly SVG_MORPHOLOGY_OPERATOR_UNKNOWN: number;
+};
+
+interface SVGFEOffsetElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly dx: SVGAnimatedNumber;
+    readonly dy: SVGAnimatedNumber;
+    readonly in1: SVGAnimatedString;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEOffsetElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEOffsetElement: {
+    prototype: SVGFEOffsetElement;
+    new(): SVGFEOffsetElement;
+};
+
+interface SVGFEPointLightElement extends SVGElement {
+    readonly x: SVGAnimatedNumber;
+    readonly y: SVGAnimatedNumber;
+    readonly z: SVGAnimatedNumber;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEPointLightElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEPointLightElement: {
+    prototype: SVGFEPointLightElement;
+    new(): SVGFEPointLightElement;
+};
+
+interface SVGFESpecularLightingElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    readonly kernelUnitLengthX: SVGAnimatedNumber;
+    readonly kernelUnitLengthY: SVGAnimatedNumber;
+    readonly specularConstant: SVGAnimatedNumber;
+    readonly specularExponent: SVGAnimatedNumber;
+    readonly surfaceScale: SVGAnimatedNumber;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFESpecularLightingElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFESpecularLightingElement: {
+    prototype: SVGFESpecularLightingElement;
+    new(): SVGFESpecularLightingElement;
+};
+
+interface SVGFESpotLightElement extends SVGElement {
+    readonly limitingConeAngle: SVGAnimatedNumber;
+    readonly pointsAtX: SVGAnimatedNumber;
+    readonly pointsAtY: SVGAnimatedNumber;
+    readonly pointsAtZ: SVGAnimatedNumber;
+    readonly specularExponent: SVGAnimatedNumber;
+    readonly x: SVGAnimatedNumber;
+    readonly y: SVGAnimatedNumber;
+    readonly z: SVGAnimatedNumber;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFESpotLightElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFESpotLightElement: {
+    prototype: SVGFESpotLightElement;
+    new(): SVGFESpotLightElement;
+};
+
+interface SVGFETileElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFETileElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFETileElement: {
+    prototype: SVGFETileElement;
+    new(): SVGFETileElement;
+};
+
+interface SVGFETurbulenceElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly baseFrequencyX: SVGAnimatedNumber;
+    readonly baseFrequencyY: SVGAnimatedNumber;
+    readonly numOctaves: SVGAnimatedInteger;
+    readonly seed: SVGAnimatedNumber;
+    readonly stitchTiles: SVGAnimatedEnumeration;
+    readonly type: SVGAnimatedEnumeration;
+    readonly SVG_STITCHTYPE_NOSTITCH: number;
+    readonly SVG_STITCHTYPE_STITCH: number;
+    readonly SVG_STITCHTYPE_UNKNOWN: number;
+    readonly SVG_TURBULENCE_TYPE_FRACTALNOISE: number;
+    readonly SVG_TURBULENCE_TYPE_TURBULENCE: number;
+    readonly SVG_TURBULENCE_TYPE_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFETurbulenceElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFETurbulenceElement: {
+    prototype: SVGFETurbulenceElement;
+    new(): SVGFETurbulenceElement;
+    readonly SVG_STITCHTYPE_NOSTITCH: number;
+    readonly SVG_STITCHTYPE_STITCH: number;
+    readonly SVG_STITCHTYPE_UNKNOWN: number;
+    readonly SVG_TURBULENCE_TYPE_FRACTALNOISE: number;
+    readonly SVG_TURBULENCE_TYPE_TURBULENCE: number;
+    readonly SVG_TURBULENCE_TYPE_UNKNOWN: number;
+};
+
+interface SVGFilterElement extends SVGElement, SVGUnitTypes, SVGURIReference {
+    readonly filterResX: SVGAnimatedInteger;
+    readonly filterResY: SVGAnimatedInteger;
+    readonly filterUnits: SVGAnimatedEnumeration;
+    readonly height: SVGAnimatedLength;
+    readonly primitiveUnits: SVGAnimatedEnumeration;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+    setFilterRes(filterResX: number, filterResY: number): void;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFilterElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFilterElement: {
+    prototype: SVGFilterElement;
+    new(): SVGFilterElement;
+};
+
+interface SVGForeignObjectElement extends SVGGraphicsElement {
+    readonly height: SVGAnimatedLength;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGForeignObjectElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGForeignObjectElement: {
+    prototype: SVGForeignObjectElement;
+    new(): SVGForeignObjectElement;
+};
+
+interface SVGGElement extends SVGGraphicsElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGGElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGGElement: {
+    prototype: SVGGElement;
+    new(): SVGGElement;
+};
+
+interface SVGGradientElement extends SVGElement, SVGUnitTypes, SVGURIReference {
+    readonly gradientTransform: SVGAnimatedTransformList;
+    readonly gradientUnits: SVGAnimatedEnumeration;
+    readonly spreadMethod: SVGAnimatedEnumeration;
+    readonly SVG_SPREADMETHOD_PAD: number;
+    readonly SVG_SPREADMETHOD_REFLECT: number;
+    readonly SVG_SPREADMETHOD_REPEAT: number;
+    readonly SVG_SPREADMETHOD_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGGradientElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGGradientElement: {
+    prototype: SVGGradientElement;
+    new(): SVGGradientElement;
+    readonly SVG_SPREADMETHOD_PAD: number;
+    readonly SVG_SPREADMETHOD_REFLECT: number;
+    readonly SVG_SPREADMETHOD_REPEAT: number;
+    readonly SVG_SPREADMETHOD_UNKNOWN: number;
+};
+
+interface SVGGraphicsElement extends SVGElement, SVGTests {
+    readonly farthestViewportElement: SVGElement;
+    readonly nearestViewportElement: SVGElement;
+    readonly transform: SVGAnimatedTransformList;
+    getBBox(): SVGRect;
+    getCTM(): SVGMatrix;
+    getScreenCTM(): SVGMatrix;
+    getTransformToElement(element: SVGElement): SVGMatrix;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGGraphicsElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGGraphicsElement: {
+    prototype: SVGGraphicsElement;
+    new(): SVGGraphicsElement;
+};
+
+interface SVGImageElement extends SVGGraphicsElement, SVGURIReference {
+    readonly height: SVGAnimatedLength;
+    readonly preserveAspectRatio: SVGAnimatedPreserveAspectRatio;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGImageElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGImageElement: {
+    prototype: SVGImageElement;
+    new(): SVGImageElement;
+};
+
+interface SVGLength {
+    readonly unitType: number;
+    value: number;
+    valueAsString: string;
+    valueInSpecifiedUnits: number;
+    convertToSpecifiedUnits(unitType: number): void;
+    newValueSpecifiedUnits(unitType: number, valueInSpecifiedUnits: number): void;
+    readonly SVG_LENGTHTYPE_CM: number;
+    readonly SVG_LENGTHTYPE_EMS: number;
+    readonly SVG_LENGTHTYPE_EXS: number;
+    readonly SVG_LENGTHTYPE_IN: number;
+    readonly SVG_LENGTHTYPE_MM: number;
+    readonly SVG_LENGTHTYPE_NUMBER: number;
+    readonly SVG_LENGTHTYPE_PC: number;
+    readonly SVG_LENGTHTYPE_PERCENTAGE: number;
+    readonly SVG_LENGTHTYPE_PT: number;
+    readonly SVG_LENGTHTYPE_PX: number;
+    readonly SVG_LENGTHTYPE_UNKNOWN: number;
+}
+
+declare var SVGLength: {
+    prototype: SVGLength;
+    new(): SVGLength;
+    readonly SVG_LENGTHTYPE_CM: number;
+    readonly SVG_LENGTHTYPE_EMS: number;
+    readonly SVG_LENGTHTYPE_EXS: number;
+    readonly SVG_LENGTHTYPE_IN: number;
+    readonly SVG_LENGTHTYPE_MM: number;
+    readonly SVG_LENGTHTYPE_NUMBER: number;
+    readonly SVG_LENGTHTYPE_PC: number;
+    readonly SVG_LENGTHTYPE_PERCENTAGE: number;
+    readonly SVG_LENGTHTYPE_PT: number;
+    readonly SVG_LENGTHTYPE_PX: number;
+    readonly SVG_LENGTHTYPE_UNKNOWN: number;
+};
+
+interface SVGLengthList {
+    readonly numberOfItems: number;
+    appendItem(newItem: SVGLength): SVGLength;
+    clear(): void;
+    getItem(index: number): SVGLength;
+    initialize(newItem: SVGLength): SVGLength;
+    insertItemBefore(newItem: SVGLength, index: number): SVGLength;
+    removeItem(index: number): SVGLength;
+    replaceItem(newItem: SVGLength, index: number): SVGLength;
+}
+
+declare var SVGLengthList: {
+    prototype: SVGLengthList;
+    new(): SVGLengthList;
+};
+
+interface SVGLinearGradientElement extends SVGGradientElement {
+    readonly x1: SVGAnimatedLength;
+    readonly x2: SVGAnimatedLength;
+    readonly y1: SVGAnimatedLength;
+    readonly y2: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGLinearGradientElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGLinearGradientElement: {
+    prototype: SVGLinearGradientElement;
+    new(): SVGLinearGradientElement;
+};
+
+interface SVGLineElement extends SVGGraphicsElement {
+    readonly x1: SVGAnimatedLength;
+    readonly x2: SVGAnimatedLength;
+    readonly y1: SVGAnimatedLength;
+    readonly y2: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGLineElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGLineElement: {
+    prototype: SVGLineElement;
+    new(): SVGLineElement;
+};
+
+interface SVGMarkerElement extends SVGElement, SVGFitToViewBox {
+    readonly markerHeight: SVGAnimatedLength;
+    readonly markerUnits: SVGAnimatedEnumeration;
+    readonly markerWidth: SVGAnimatedLength;
+    readonly orientAngle: SVGAnimatedAngle;
+    readonly orientType: SVGAnimatedEnumeration;
+    readonly refX: SVGAnimatedLength;
+    readonly refY: SVGAnimatedLength;
+    setOrientToAngle(angle: SVGAngle): void;
+    setOrientToAuto(): void;
+    readonly SVG_MARKER_ORIENT_ANGLE: number;
+    readonly SVG_MARKER_ORIENT_AUTO: number;
+    readonly SVG_MARKER_ORIENT_UNKNOWN: number;
+    readonly SVG_MARKERUNITS_STROKEWIDTH: number;
+    readonly SVG_MARKERUNITS_UNKNOWN: number;
+    readonly SVG_MARKERUNITS_USERSPACEONUSE: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGMarkerElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGMarkerElement: {
+    prototype: SVGMarkerElement;
+    new(): SVGMarkerElement;
+    readonly SVG_MARKER_ORIENT_ANGLE: number;
+    readonly SVG_MARKER_ORIENT_AUTO: number;
+    readonly SVG_MARKER_ORIENT_UNKNOWN: number;
+    readonly SVG_MARKERUNITS_STROKEWIDTH: number;
+    readonly SVG_MARKERUNITS_UNKNOWN: number;
+    readonly SVG_MARKERUNITS_USERSPACEONUSE: number;
+};
+
+interface SVGMaskElement extends SVGElement, SVGTests, SVGUnitTypes {
+    readonly height: SVGAnimatedLength;
+    readonly maskContentUnits: SVGAnimatedEnumeration;
+    readonly maskUnits: SVGAnimatedEnumeration;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGMaskElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGMaskElement: {
+    prototype: SVGMaskElement;
+    new(): SVGMaskElement;
+};
+
+interface SVGMatrix {
+    a: number;
+    b: number;
+    c: number;
+    d: number;
+    e: number;
+    f: number;
+    flipX(): SVGMatrix;
+    flipY(): SVGMatrix;
+    inverse(): SVGMatrix;
+    multiply(secondMatrix: SVGMatrix): SVGMatrix;
+    rotate(angle: number): SVGMatrix;
+    rotateFromVector(x: number, y: number): SVGMatrix;
+    scale(scaleFactor: number): SVGMatrix;
+    scaleNonUniform(scaleFactorX: number, scaleFactorY: number): SVGMatrix;
+    skewX(angle: number): SVGMatrix;
+    skewY(angle: number): SVGMatrix;
+    translate(x: number, y: number): SVGMatrix;
+}
+
+declare var SVGMatrix: {
+    prototype: SVGMatrix;
+    new(): SVGMatrix;
+};
+
+interface SVGMetadataElement extends SVGElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGMetadataElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGMetadataElement: {
+    prototype: SVGMetadataElement;
+    new(): SVGMetadataElement;
+};
+
+interface SVGNumber {
+    value: number;
+}
+
+declare var SVGNumber: {
+    prototype: SVGNumber;
+    new(): SVGNumber;
+};
+
+interface SVGNumberList {
+    readonly numberOfItems: number;
+    appendItem(newItem: SVGNumber): SVGNumber;
+    clear(): void;
+    getItem(index: number): SVGNumber;
+    initialize(newItem: SVGNumber): SVGNumber;
+    insertItemBefore(newItem: SVGNumber, index: number): SVGNumber;
+    removeItem(index: number): SVGNumber;
+    replaceItem(newItem: SVGNumber, index: number): SVGNumber;
+}
+
+declare var SVGNumberList: {
+    prototype: SVGNumberList;
+    new(): SVGNumberList;
+};
+
+interface SVGPathElement extends SVGGraphicsElement {
+    readonly pathSegList: SVGPathSegList;
+    createSVGPathSegArcAbs(x: number, y: number, r1: number, r2: number, angle: number, largeArcFlag: boolean, sweepFlag: boolean): SVGPathSegArcAbs;
+    createSVGPathSegArcRel(x: number, y: number, r1: number, r2: number, angle: number, largeArcFlag: boolean, sweepFlag: boolean): SVGPathSegArcRel;
+    createSVGPathSegClosePath(): SVGPathSegClosePath;
+    createSVGPathSegCurvetoCubicAbs(x: number, y: number, x1: number, y1: number, x2: number, y2: number): SVGPathSegCurvetoCubicAbs;
+    createSVGPathSegCurvetoCubicRel(x: number, y: number, x1: number, y1: number, x2: number, y2: number): SVGPathSegCurvetoCubicRel;
+    createSVGPathSegCurvetoCubicSmoothAbs(x: number, y: number, x2: number, y2: number): SVGPathSegCurvetoCubicSmoothAbs;
+    createSVGPathSegCurvetoCubicSmoothRel(x: number, y: number, x2: number, y2: number): SVGPathSegCurvetoCubicSmoothRel;
+    createSVGPathSegCurvetoQuadraticAbs(x: number, y: number, x1: number, y1: number): SVGPathSegCurvetoQuadraticAbs;
+    createSVGPathSegCurvetoQuadraticRel(x: number, y: number, x1: number, y1: number): SVGPathSegCurvetoQuadraticRel;
+    createSVGPathSegCurvetoQuadraticSmoothAbs(x: number, y: number): SVGPathSegCurvetoQuadraticSmoothAbs;
+    createSVGPathSegCurvetoQuadraticSmoothRel(x: number, y: number): SVGPathSegCurvetoQuadraticSmoothRel;
+    createSVGPathSegLinetoAbs(x: number, y: number): SVGPathSegLinetoAbs;
+    createSVGPathSegLinetoHorizontalAbs(x: number): SVGPathSegLinetoHorizontalAbs;
+    createSVGPathSegLinetoHorizontalRel(x: number): SVGPathSegLinetoHorizontalRel;
+    createSVGPathSegLinetoRel(x: number, y: number): SVGPathSegLinetoRel;
+    createSVGPathSegLinetoVerticalAbs(y: number): SVGPathSegLinetoVerticalAbs;
+    createSVGPathSegLinetoVerticalRel(y: number): SVGPathSegLinetoVerticalRel;
+    createSVGPathSegMovetoAbs(x: number, y: number): SVGPathSegMovetoAbs;
+    createSVGPathSegMovetoRel(x: number, y: number): SVGPathSegMovetoRel;
+    getPathSegAtLength(distance: number): number;
+    getPointAtLength(distance: number): SVGPoint;
+    getTotalLength(): number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGPathElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGPathElement: {
+    prototype: SVGPathElement;
+    new(): SVGPathElement;
+};
+
+interface SVGPathSeg {
+    readonly pathSegType: number;
+    readonly pathSegTypeAsLetter: string;
+    readonly PATHSEG_ARC_ABS: number;
+    readonly PATHSEG_ARC_REL: number;
+    readonly PATHSEG_CLOSEPATH: number;
+    readonly PATHSEG_CURVETO_CUBIC_ABS: number;
+    readonly PATHSEG_CURVETO_CUBIC_REL: number;
+    readonly PATHSEG_CURVETO_CUBIC_SMOOTH_ABS: number;
+    readonly PATHSEG_CURVETO_CUBIC_SMOOTH_REL: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_ABS: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_REL: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_SMOOTH_ABS: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_SMOOTH_REL: number;
+    readonly PATHSEG_LINETO_ABS: number;
+    readonly PATHSEG_LINETO_HORIZONTAL_ABS: number;
+    readonly PATHSEG_LINETO_HORIZONTAL_REL: number;
+    readonly PATHSEG_LINETO_REL: number;
+    readonly PATHSEG_LINETO_VERTICAL_ABS: number;
+    readonly PATHSEG_LINETO_VERTICAL_REL: number;
+    readonly PATHSEG_MOVETO_ABS: number;
+    readonly PATHSEG_MOVETO_REL: number;
+    readonly PATHSEG_UNKNOWN: number;
+}
+
+declare var SVGPathSeg: {
+    prototype: SVGPathSeg;
+    new(): SVGPathSeg;
+    readonly PATHSEG_ARC_ABS: number;
+    readonly PATHSEG_ARC_REL: number;
+    readonly PATHSEG_CLOSEPATH: number;
+    readonly PATHSEG_CURVETO_CUBIC_ABS: number;
+    readonly PATHSEG_CURVETO_CUBIC_REL: number;
+    readonly PATHSEG_CURVETO_CUBIC_SMOOTH_ABS: number;
+    readonly PATHSEG_CURVETO_CUBIC_SMOOTH_REL: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_ABS: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_REL: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_SMOOTH_ABS: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_SMOOTH_REL: number;
+    readonly PATHSEG_LINETO_ABS: number;
+    readonly PATHSEG_LINETO_HORIZONTAL_ABS: number;
+    readonly PATHSEG_LINETO_HORIZONTAL_REL: number;
+    readonly PATHSEG_LINETO_REL: number;
+    readonly PATHSEG_LINETO_VERTICAL_ABS: number;
+    readonly PATHSEG_LINETO_VERTICAL_REL: number;
+    readonly PATHSEG_MOVETO_ABS: number;
+    readonly PATHSEG_MOVETO_REL: number;
+    readonly PATHSEG_UNKNOWN: number;
+};
+
+interface SVGPathSegArcAbs extends SVGPathSeg {
+    angle: number;
+    largeArcFlag: boolean;
+    r1: number;
+    r2: number;
+    sweepFlag: boolean;
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegArcAbs: {
+    prototype: SVGPathSegArcAbs;
+    new(): SVGPathSegArcAbs;
+};
+
+interface SVGPathSegArcRel extends SVGPathSeg {
+    angle: number;
+    largeArcFlag: boolean;
+    r1: number;
+    r2: number;
+    sweepFlag: boolean;
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegArcRel: {
+    prototype: SVGPathSegArcRel;
+    new(): SVGPathSegArcRel;
+};
+
+interface SVGPathSegClosePath extends SVGPathSeg {
+}
+
+declare var SVGPathSegClosePath: {
+    prototype: SVGPathSegClosePath;
+    new(): SVGPathSegClosePath;
+};
+
+interface SVGPathSegCurvetoCubicAbs extends SVGPathSeg {
+    x: number;
+    x1: number;
+    x2: number;
+    y: number;
+    y1: number;
+    y2: number;
+}
+
+declare var SVGPathSegCurvetoCubicAbs: {
+    prototype: SVGPathSegCurvetoCubicAbs;
+    new(): SVGPathSegCurvetoCubicAbs;
+};
+
+interface SVGPathSegCurvetoCubicRel extends SVGPathSeg {
+    x: number;
+    x1: number;
+    x2: number;
+    y: number;
+    y1: number;
+    y2: number;
+}
+
+declare var SVGPathSegCurvetoCubicRel: {
+    prototype: SVGPathSegCurvetoCubicRel;
+    new(): SVGPathSegCurvetoCubicRel;
+};
+
+interface SVGPathSegCurvetoCubicSmoothAbs extends SVGPathSeg {
+    x: number;
+    x2: number;
+    y: number;
+    y2: number;
+}
+
+declare var SVGPathSegCurvetoCubicSmoothAbs: {
+    prototype: SVGPathSegCurvetoCubicSmoothAbs;
+    new(): SVGPathSegCurvetoCubicSmoothAbs;
+};
+
+interface SVGPathSegCurvetoCubicSmoothRel extends SVGPathSeg {
+    x: number;
+    x2: number;
+    y: number;
+    y2: number;
+}
+
+declare var SVGPathSegCurvetoCubicSmoothRel: {
+    prototype: SVGPathSegCurvetoCubicSmoothRel;
+    new(): SVGPathSegCurvetoCubicSmoothRel;
+};
+
+interface SVGPathSegCurvetoQuadraticAbs extends SVGPathSeg {
+    x: number;
+    x1: number;
+    y: number;
+    y1: number;
+}
+
+declare var SVGPathSegCurvetoQuadraticAbs: {
+    prototype: SVGPathSegCurvetoQuadraticAbs;
+    new(): SVGPathSegCurvetoQuadraticAbs;
+};
+
+interface SVGPathSegCurvetoQuadraticRel extends SVGPathSeg {
+    x: number;
+    x1: number;
+    y: number;
+    y1: number;
+}
+
+declare var SVGPathSegCurvetoQuadraticRel: {
+    prototype: SVGPathSegCurvetoQuadraticRel;
+    new(): SVGPathSegCurvetoQuadraticRel;
+};
+
+interface SVGPathSegCurvetoQuadraticSmoothAbs extends SVGPathSeg {
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegCurvetoQuadraticSmoothAbs: {
+    prototype: SVGPathSegCurvetoQuadraticSmoothAbs;
+    new(): SVGPathSegCurvetoQuadraticSmoothAbs;
+};
+
+interface SVGPathSegCurvetoQuadraticSmoothRel extends SVGPathSeg {
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegCurvetoQuadraticSmoothRel: {
+    prototype: SVGPathSegCurvetoQuadraticSmoothRel;
+    new(): SVGPathSegCurvetoQuadraticSmoothRel;
+};
+
+interface SVGPathSegLinetoAbs extends SVGPathSeg {
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegLinetoAbs: {
+    prototype: SVGPathSegLinetoAbs;
+    new(): SVGPathSegLinetoAbs;
+};
+
+interface SVGPathSegLinetoHorizontalAbs extends SVGPathSeg {
+    x: number;
+}
+
+declare var SVGPathSegLinetoHorizontalAbs: {
+    prototype: SVGPathSegLinetoHorizontalAbs;
+    new(): SVGPathSegLinetoHorizontalAbs;
+};
+
+interface SVGPathSegLinetoHorizontalRel extends SVGPathSeg {
+    x: number;
+}
+
+declare var SVGPathSegLinetoHorizontalRel: {
+    prototype: SVGPathSegLinetoHorizontalRel;
+    new(): SVGPathSegLinetoHorizontalRel;
+};
+
+interface SVGPathSegLinetoRel extends SVGPathSeg {
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegLinetoRel: {
+    prototype: SVGPathSegLinetoRel;
+    new(): SVGPathSegLinetoRel;
+};
+
+interface SVGPathSegLinetoVerticalAbs extends SVGPathSeg {
+    y: number;
+}
+
+declare var SVGPathSegLinetoVerticalAbs: {
+    prototype: SVGPathSegLinetoVerticalAbs;
+    new(): SVGPathSegLinetoVerticalAbs;
+};
+
+interface SVGPathSegLinetoVerticalRel extends SVGPathSeg {
+    y: number;
+}
+
+declare var SVGPathSegLinetoVerticalRel: {
+    prototype: SVGPathSegLinetoVerticalRel;
+    new(): SVGPathSegLinetoVerticalRel;
+};
+
+interface SVGPathSegList {
+    readonly numberOfItems: number;
+    appendItem(newItem: SVGPathSeg): SVGPathSeg;
+    clear(): void;
+    getItem(index: number): SVGPathSeg;
+    initialize(newItem: SVGPathSeg): SVGPathSeg;
+    insertItemBefore(newItem: SVGPathSeg, index: number): SVGPathSeg;
+    removeItem(index: number): SVGPathSeg;
+    replaceItem(newItem: SVGPathSeg, index: number): SVGPathSeg;
+}
+
+declare var SVGPathSegList: {
+    prototype: SVGPathSegList;
+    new(): SVGPathSegList;
+};
+
+interface SVGPathSegMovetoAbs extends SVGPathSeg {
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegMovetoAbs: {
+    prototype: SVGPathSegMovetoAbs;
+    new(): SVGPathSegMovetoAbs;
+};
+
+interface SVGPathSegMovetoRel extends SVGPathSeg {
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegMovetoRel: {
+    prototype: SVGPathSegMovetoRel;
+    new(): SVGPathSegMovetoRel;
+};
+
+interface SVGPatternElement extends SVGElement, SVGTests, SVGUnitTypes, SVGFitToViewBox, SVGURIReference {
+    readonly height: SVGAnimatedLength;
+    readonly patternContentUnits: SVGAnimatedEnumeration;
+    readonly patternTransform: SVGAnimatedTransformList;
+    readonly patternUnits: SVGAnimatedEnumeration;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGPatternElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGPatternElement: {
+    prototype: SVGPatternElement;
+    new(): SVGPatternElement;
+};
+
+interface SVGPoint {
+    x: number;
+    y: number;
+    matrixTransform(matrix: SVGMatrix): SVGPoint;
+}
+
+declare var SVGPoint: {
+    prototype: SVGPoint;
+    new(): SVGPoint;
+};
+
+interface SVGPointList {
+    readonly numberOfItems: number;
+    appendItem(newItem: SVGPoint): SVGPoint;
+    clear(): void;
+    getItem(index: number): SVGPoint;
+    initialize(newItem: SVGPoint): SVGPoint;
+    insertItemBefore(newItem: SVGPoint, index: number): SVGPoint;
+    removeItem(index: number): SVGPoint;
+    replaceItem(newItem: SVGPoint, index: number): SVGPoint;
+}
+
+declare var SVGPointList: {
+    prototype: SVGPointList;
+    new(): SVGPointList;
+};
+
+interface SVGPolygonElement extends SVGGraphicsElement, SVGAnimatedPoints {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGPolygonElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGPolygonElement: {
+    prototype: SVGPolygonElement;
+    new(): SVGPolygonElement;
+};
+
+interface SVGPolylineElement extends SVGGraphicsElement, SVGAnimatedPoints {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGPolylineElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGPolylineElement: {
+    prototype: SVGPolylineElement;
+    new(): SVGPolylineElement;
+};
+
+interface SVGPreserveAspectRatio {
+    align: number;
+    meetOrSlice: number;
+    readonly SVG_MEETORSLICE_MEET: number;
+    readonly SVG_MEETORSLICE_SLICE: number;
+    readonly SVG_MEETORSLICE_UNKNOWN: number;
+    readonly SVG_PRESERVEASPECTRATIO_NONE: number;
+    readonly SVG_PRESERVEASPECTRATIO_UNKNOWN: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMAXYMAX: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMAXYMID: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMAXYMIN: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMIDYMAX: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMIDYMID: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMIDYMIN: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMINYMAX: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMINYMID: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMINYMIN: number;
+}
+
+declare var SVGPreserveAspectRatio: {
+    prototype: SVGPreserveAspectRatio;
+    new(): SVGPreserveAspectRatio;
+    readonly SVG_MEETORSLICE_MEET: number;
+    readonly SVG_MEETORSLICE_SLICE: number;
+    readonly SVG_MEETORSLICE_UNKNOWN: number;
+    readonly SVG_PRESERVEASPECTRATIO_NONE: number;
+    readonly SVG_PRESERVEASPECTRATIO_UNKNOWN: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMAXYMAX: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMAXYMID: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMAXYMIN: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMIDYMAX: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMIDYMID: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMIDYMIN: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMINYMAX: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMINYMID: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMINYMIN: number;
+};
+
+interface SVGRadialGradientElement extends SVGGradientElement {
+    readonly cx: SVGAnimatedLength;
+    readonly cy: SVGAnimatedLength;
+    readonly fx: SVGAnimatedLength;
+    readonly fy: SVGAnimatedLength;
+    readonly r: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGRadialGradientElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGRadialGradientElement: {
+    prototype: SVGRadialGradientElement;
+    new(): SVGRadialGradientElement;
+};
+
+interface SVGRect {
+    height: number;
+    width: number;
+    x: number;
+    y: number;
+}
+
+declare var SVGRect: {
+    prototype: SVGRect;
+    new(): SVGRect;
+};
+
+interface SVGRectElement extends SVGGraphicsElement {
+    readonly height: SVGAnimatedLength;
+    readonly rx: SVGAnimatedLength;
+    readonly ry: SVGAnimatedLength;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGRectElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGRectElement: {
+    prototype: SVGRectElement;
+    new(): SVGRectElement;
+};
+
+interface SVGScriptElement extends SVGElement, SVGURIReference {
+    type: string;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGScriptElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGScriptElement: {
+    prototype: SVGScriptElement;
+    new(): SVGScriptElement;
+};
+
+interface SVGStopElement extends SVGElement {
+    readonly offset: SVGAnimatedNumber;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGStopElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGStopElement: {
+    prototype: SVGStopElement;
+    new(): SVGStopElement;
+};
+
+interface SVGStringList {
+    readonly numberOfItems: number;
+    appendItem(newItem: string): string;
+    clear(): void;
+    getItem(index: number): string;
+    initialize(newItem: string): string;
+    insertItemBefore(newItem: string, index: number): string;
+    removeItem(index: number): string;
+    replaceItem(newItem: string, index: number): string;
+}
+
+declare var SVGStringList: {
+    prototype: SVGStringList;
+    new(): SVGStringList;
+};
+
+interface SVGStyleElement extends SVGElement {
+    disabled: boolean;
+    media: string;
+    title: string;
+    type: string;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGStyleElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGStyleElement: {
+    prototype: SVGStyleElement;
+    new(): SVGStyleElement;
+};
+
+interface SVGSVGElementEventMap extends SVGElementEventMap {
+    "SVGAbort": Event;
+    "SVGError": Event;
+    "resize": UIEvent;
+    "scroll": UIEvent;
+    "SVGUnload": Event;
+    "SVGZoom": SVGZoomEvent;
+}
+
+interface SVGSVGElement extends SVGGraphicsElement, DocumentEvent, SVGFitToViewBox, SVGZoomAndPan {
+    contentScriptType: string;
+    contentStyleType: string;
+    currentScale: number;
+    readonly currentTranslate: SVGPoint;
+    readonly height: SVGAnimatedLength;
+    onabort: (this: SVGSVGElement, ev: Event) => any;
+    onerror: (this: SVGSVGElement, ev: Event) => any;
+    onresize: (this: SVGSVGElement, ev: UIEvent) => any;
+    onscroll: (this: SVGSVGElement, ev: UIEvent) => any;
+    onunload: (this: SVGSVGElement, ev: Event) => any;
+    onzoom: (this: SVGSVGElement, ev: SVGZoomEvent) => any;
+    readonly pixelUnitToMillimeterX: number;
+    readonly pixelUnitToMillimeterY: number;
+    readonly screenPixelToMillimeterX: number;
+    readonly screenPixelToMillimeterY: number;
+    readonly viewport: SVGRect;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+    checkEnclosure(element: SVGElement, rect: SVGRect): boolean;
+    checkIntersection(element: SVGElement, rect: SVGRect): boolean;
+    createSVGAngle(): SVGAngle;
+    createSVGLength(): SVGLength;
+    createSVGMatrix(): SVGMatrix;
+    createSVGNumber(): SVGNumber;
+    createSVGPoint(): SVGPoint;
+    createSVGRect(): SVGRect;
+    createSVGTransform(): SVGTransform;
+    createSVGTransformFromMatrix(matrix: SVGMatrix): SVGTransform;
+    deselectAll(): void;
+    forceRedraw(): void;
+    getComputedStyle(elt: Element, pseudoElt?: string): CSSStyleDeclaration;
+    getCurrentTime(): number;
+    getElementById(elementId: string): Element;
+    getEnclosureList(rect: SVGRect, referenceElement: SVGElement): NodeListOf<SVGCircleElement | SVGEllipseElement | SVGImageElement | SVGLineElement | SVGPathElement | SVGPolygonElement | SVGPolylineElement | SVGRectElement | SVGTextElement | SVGUseElement>;
+    getIntersectionList(rect: SVGRect, referenceElement: SVGElement): NodeListOf<SVGCircleElement | SVGEllipseElement | SVGImageElement | SVGLineElement | SVGPathElement | SVGPolygonElement | SVGPolylineElement | SVGRectElement | SVGTextElement | SVGUseElement>;
+    pauseAnimations(): void;
+    setCurrentTime(seconds: number): void;
+    suspendRedraw(maxWaitMilliseconds: number): number;
+    unpauseAnimations(): void;
+    unsuspendRedraw(suspendHandleID: number): void;
+    unsuspendRedrawAll(): void;
+    addEventListener<K extends keyof SVGSVGElementEventMap>(type: K, listener: (this: SVGSVGElement, ev: SVGSVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGSVGElement: {
+    prototype: SVGSVGElement;
+    new(): SVGSVGElement;
+};
+
+interface SVGSwitchElement extends SVGGraphicsElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGSwitchElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGSwitchElement: {
+    prototype: SVGSwitchElement;
+    new(): SVGSwitchElement;
+};
+
+interface SVGSymbolElement extends SVGElement, SVGFitToViewBox {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGSymbolElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGSymbolElement: {
+    prototype: SVGSymbolElement;
+    new(): SVGSymbolElement;
+};
+
+interface SVGTextContentElement extends SVGGraphicsElement {
+    readonly lengthAdjust: SVGAnimatedEnumeration;
+    readonly textLength: SVGAnimatedLength;
+    getCharNumAtPosition(point: SVGPoint): number;
+    getComputedTextLength(): number;
+    getEndPositionOfChar(charnum: number): SVGPoint;
+    getExtentOfChar(charnum: number): SVGRect;
+    getNumberOfChars(): number;
+    getRotationOfChar(charnum: number): number;
+    getStartPositionOfChar(charnum: number): SVGPoint;
+    getSubStringLength(charnum: number, nchars: number): number;
+    selectSubString(charnum: number, nchars: number): void;
+    readonly LENGTHADJUST_SPACING: number;
+    readonly LENGTHADJUST_SPACINGANDGLYPHS: number;
+    readonly LENGTHADJUST_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGTextContentElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGTextContentElement: {
+    prototype: SVGTextContentElement;
+    new(): SVGTextContentElement;
+    readonly LENGTHADJUST_SPACING: number;
+    readonly LENGTHADJUST_SPACINGANDGLYPHS: number;
+    readonly LENGTHADJUST_UNKNOWN: number;
+};
+
+interface SVGTextElement extends SVGTextPositioningElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGTextElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGTextElement: {
+    prototype: SVGTextElement;
+    new(): SVGTextElement;
+};
+
+interface SVGTextPathElement extends SVGTextContentElement, SVGURIReference {
+    readonly method: SVGAnimatedEnumeration;
+    readonly spacing: SVGAnimatedEnumeration;
+    readonly startOffset: SVGAnimatedLength;
+    readonly TEXTPATH_METHODTYPE_ALIGN: number;
+    readonly TEXTPATH_METHODTYPE_STRETCH: number;
+    readonly TEXTPATH_METHODTYPE_UNKNOWN: number;
+    readonly TEXTPATH_SPACINGTYPE_AUTO: number;
+    readonly TEXTPATH_SPACINGTYPE_EXACT: number;
+    readonly TEXTPATH_SPACINGTYPE_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGTextPathElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGTextPathElement: {
+    prototype: SVGTextPathElement;
+    new(): SVGTextPathElement;
+    readonly TEXTPATH_METHODTYPE_ALIGN: number;
+    readonly TEXTPATH_METHODTYPE_STRETCH: number;
+    readonly TEXTPATH_METHODTYPE_UNKNOWN: number;
+    readonly TEXTPATH_SPACINGTYPE_AUTO: number;
+    readonly TEXTPATH_SPACINGTYPE_EXACT: number;
+    readonly TEXTPATH_SPACINGTYPE_UNKNOWN: number;
+};
+
+interface SVGTextPositioningElement extends SVGTextContentElement {
+    readonly dx: SVGAnimatedLengthList;
+    readonly dy: SVGAnimatedLengthList;
+    readonly rotate: SVGAnimatedNumberList;
+    readonly x: SVGAnimatedLengthList;
+    readonly y: SVGAnimatedLengthList;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGTextPositioningElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGTextPositioningElement: {
+    prototype: SVGTextPositioningElement;
+    new(): SVGTextPositioningElement;
+};
+
+interface SVGTitleElement extends SVGElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGTitleElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGTitleElement: {
+    prototype: SVGTitleElement;
+    new(): SVGTitleElement;
+};
+
+interface SVGTransform {
+    readonly angle: number;
+    readonly matrix: SVGMatrix;
+    readonly type: number;
+    setMatrix(matrix: SVGMatrix): void;
+    setRotate(angle: number, cx: number, cy: number): void;
+    setScale(sx: number, sy: number): void;
+    setSkewX(angle: number): void;
+    setSkewY(angle: number): void;
+    setTranslate(tx: number, ty: number): void;
+    readonly SVG_TRANSFORM_MATRIX: number;
+    readonly SVG_TRANSFORM_ROTATE: number;
+    readonly SVG_TRANSFORM_SCALE: number;
+    readonly SVG_TRANSFORM_SKEWX: number;
+    readonly SVG_TRANSFORM_SKEWY: number;
+    readonly SVG_TRANSFORM_TRANSLATE: number;
+    readonly SVG_TRANSFORM_UNKNOWN: number;
+}
+
+declare var SVGTransform: {
+    prototype: SVGTransform;
+    new(): SVGTransform;
+    readonly SVG_TRANSFORM_MATRIX: number;
+    readonly SVG_TRANSFORM_ROTATE: number;
+    readonly SVG_TRANSFORM_SCALE: number;
+    readonly SVG_TRANSFORM_SKEWX: number;
+    readonly SVG_TRANSFORM_SKEWY: number;
+    readonly SVG_TRANSFORM_TRANSLATE: number;
+    readonly SVG_TRANSFORM_UNKNOWN: number;
+};
+
+interface SVGTransformList {
+    readonly numberOfItems: number;
+    appendItem(newItem: SVGTransform): SVGTransform;
+    clear(): void;
+    consolidate(): SVGTransform;
+    createSVGTransformFromMatrix(matrix: SVGMatrix): SVGTransform;
+    getItem(index: number): SVGTransform;
+    initialize(newItem: SVGTransform): SVGTransform;
+    insertItemBefore(newItem: SVGTransform, index: number): SVGTransform;
+    removeItem(index: number): SVGTransform;
+    replaceItem(newItem: SVGTransform, index: number): SVGTransform;
+}
+
+declare var SVGTransformList: {
+    prototype: SVGTransformList;
+    new(): SVGTransformList;
+};
+
+interface SVGTSpanElement extends SVGTextPositioningElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGTSpanElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGTSpanElement: {
+    prototype: SVGTSpanElement;
+    new(): SVGTSpanElement;
+};
+
+interface SVGUnitTypes {
+    readonly SVG_UNIT_TYPE_OBJECTBOUNDINGBOX: number;
+    readonly SVG_UNIT_TYPE_UNKNOWN: number;
+    readonly SVG_UNIT_TYPE_USERSPACEONUSE: number;
+}
+declare var SVGUnitTypes: SVGUnitTypes;
+
+interface SVGUseElement extends SVGGraphicsElement, SVGURIReference {
+    readonly animatedInstanceRoot: SVGElementInstance;
+    readonly height: SVGAnimatedLength;
+    readonly instanceRoot: SVGElementInstance;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGUseElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGUseElement: {
+    prototype: SVGUseElement;
+    new(): SVGUseElement;
+};
+
+interface SVGViewElement extends SVGElement, SVGZoomAndPan, SVGFitToViewBox {
+    readonly viewTarget: SVGStringList;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGViewElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGViewElement: {
+    prototype: SVGViewElement;
+    new(): SVGViewElement;
+};
+
+interface SVGZoomAndPan {
+    readonly zoomAndPan: number;
+}
+
+declare var SVGZoomAndPan: {
+    readonly SVG_ZOOMANDPAN_DISABLE: number;
+    readonly SVG_ZOOMANDPAN_MAGNIFY: number;
+    readonly SVG_ZOOMANDPAN_UNKNOWN: number;
+};
+
+interface SVGZoomEvent extends UIEvent {
+    readonly newScale: number;
+    readonly newTranslate: SVGPoint;
+    readonly previousScale: number;
+    readonly previousTranslate: SVGPoint;
+    readonly zoomRectScreen: SVGRect;
+}
+
+declare var SVGZoomEvent: {
+    prototype: SVGZoomEvent;
+    new(): SVGZoomEvent;
+};
+
+interface SyncManager {
+    getTags(): any;
+    register(tag: string): Promise<void>;
+}
+
+declare var SyncManager: {
+    prototype: SyncManager;
+    new(): SyncManager;
+};
+
+interface Text extends CharacterData {
+    readonly wholeText: string;
+    readonly assignedSlot: HTMLSlotElement | null;
+    splitText(offset: number): Text;
+}
+
+declare var Text: {
+    prototype: Text;
+    new(data?: string): Text;
+};
+
+interface TextEvent extends UIEvent {
+    readonly data: string;
+    readonly inputMethod: number;
+    readonly locale: string;
+    initTextEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, dataArg: string, inputMethod: number, locale: string): void;
+    readonly DOM_INPUT_METHOD_DROP: number;
+    readonly DOM_INPUT_METHOD_HANDWRITING: number;
+    readonly DOM_INPUT_METHOD_IME: number;
+    readonly DOM_INPUT_METHOD_KEYBOARD: number;
+    readonly DOM_INPUT_METHOD_MULTIMODAL: number;
+    readonly DOM_INPUT_METHOD_OPTION: number;
+    readonly DOM_INPUT_METHOD_PASTE: number;
+    readonly DOM_INPUT_METHOD_SCRIPT: number;
+    readonly DOM_INPUT_METHOD_UNKNOWN: number;
+    readonly DOM_INPUT_METHOD_VOICE: number;
+}
+
+declare var TextEvent: {
+    prototype: TextEvent;
+    new(): TextEvent;
+    readonly DOM_INPUT_METHOD_DROP: number;
+    readonly DOM_INPUT_METHOD_HANDWRITING: number;
+    readonly DOM_INPUT_METHOD_IME: number;
+    readonly DOM_INPUT_METHOD_KEYBOARD: number;
+    readonly DOM_INPUT_METHOD_MULTIMODAL: number;
+    readonly DOM_INPUT_METHOD_OPTION: number;
+    readonly DOM_INPUT_METHOD_PASTE: number;
+    readonly DOM_INPUT_METHOD_SCRIPT: number;
+    readonly DOM_INPUT_METHOD_UNKNOWN: number;
+    readonly DOM_INPUT_METHOD_VOICE: number;
+};
+
+interface TextMetrics {
+    readonly width: number;
+}
+
+declare var TextMetrics: {
+    prototype: TextMetrics;
+    new(): TextMetrics;
+};
+
+interface TextTrackEventMap {
+    "cuechange": Event;
+    "error": Event;
+    "load": Event;
+}
+
+interface TextTrack extends EventTarget {
+    readonly activeCues: TextTrackCueList;
+    readonly cues: TextTrackCueList;
+    readonly inBandMetadataTrackDispatchType: string;
+    readonly kind: string;
+    readonly label: string;
+    readonly language: string;
+    mode: any;
+    oncuechange: (this: TextTrack, ev: Event) => any;
+    onerror: (this: TextTrack, ev: Event) => any;
+    onload: (this: TextTrack, ev: Event) => any;
+    readonly readyState: number;
+    addCue(cue: TextTrackCue): void;
+    removeCue(cue: TextTrackCue): void;
+    readonly DISABLED: number;
+    readonly ERROR: number;
+    readonly HIDDEN: number;
+    readonly LOADED: number;
+    readonly LOADING: number;
+    readonly NONE: number;
+    readonly SHOWING: number;
+    addEventListener<K extends keyof TextTrackEventMap>(type: K, listener: (this: TextTrack, ev: TextTrackEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var TextTrack: {
+    prototype: TextTrack;
+    new(): TextTrack;
+    readonly DISABLED: number;
+    readonly ERROR: number;
+    readonly HIDDEN: number;
+    readonly LOADED: number;
+    readonly LOADING: number;
+    readonly NONE: number;
+    readonly SHOWING: number;
+};
+
+interface TextTrackCueEventMap {
+    "enter": Event;
+    "exit": Event;
+}
+
+interface TextTrackCue extends EventTarget {
+    endTime: number;
+    id: string;
+    onenter: (this: TextTrackCue, ev: Event) => any;
+    onexit: (this: TextTrackCue, ev: Event) => any;
+    pauseOnExit: boolean;
+    startTime: number;
+    text: string;
+    readonly track: TextTrack;
+    getCueAsHTML(): DocumentFragment;
+    addEventListener<K extends keyof TextTrackCueEventMap>(type: K, listener: (this: TextTrackCue, ev: TextTrackCueEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var TextTrackCue: {
+    prototype: TextTrackCue;
+    new(startTime: number, endTime: number, text: string): TextTrackCue;
+};
+
+interface TextTrackCueList {
+    readonly length: number;
+    getCueById(id: string): TextTrackCue;
+    item(index: number): TextTrackCue;
+    [index: number]: TextTrackCue;
+}
+
+declare var TextTrackCueList: {
+    prototype: TextTrackCueList;
+    new(): TextTrackCueList;
+};
+
+interface TextTrackListEventMap {
+    "addtrack": TrackEvent;
+}
+
+interface TextTrackList extends EventTarget {
+    readonly length: number;
+    onaddtrack: ((this: TextTrackList, ev: TrackEvent) => any) | null;
+    item(index: number): TextTrack;
+    addEventListener<K extends keyof TextTrackListEventMap>(type: K, listener: (this: TextTrackList, ev: TextTrackListEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+    [index: number]: TextTrack;
+}
+
+declare var TextTrackList: {
+    prototype: TextTrackList;
+    new(): TextTrackList;
+};
+
+interface TimeRanges {
+    readonly length: number;
+    end(index: number): number;
+    start(index: number): number;
+}
+
+declare var TimeRanges: {
+    prototype: TimeRanges;
+    new(): TimeRanges;
+};
+
+interface Touch {
+    readonly clientX: number;
+    readonly clientY: number;
+    readonly identifier: number;
+    readonly pageX: number;
+    readonly pageY: number;
+    readonly screenX: number;
+    readonly screenY: number;
+    readonly target: EventTarget;
+}
+
+declare var Touch: {
+    prototype: Touch;
+    new(): Touch;
+};
+
+interface TouchEvent extends UIEvent {
+    readonly altKey: boolean;
+    readonly changedTouches: TouchList;
+    readonly charCode: number;
+    readonly ctrlKey: boolean;
+    readonly keyCode: number;
+    readonly metaKey: boolean;
+    readonly shiftKey: boolean;
+    readonly targetTouches: TouchList;
+    readonly touches: TouchList;
+    readonly which: number;
+}
+
+declare var TouchEvent: {
+    prototype: TouchEvent;
+    new(type: string, touchEventInit?: TouchEventInit): TouchEvent;
+};
+
+interface TouchList {
+    readonly length: number;
+    item(index: number): Touch | null;
+    [index: number]: Touch;
+}
+
+declare var TouchList: {
+    prototype: TouchList;
+    new(): TouchList;
+};
+
+interface TrackEvent extends Event {
+    readonly track: VideoTrack | AudioTrack | TextTrack | null;
+}
+
+declare var TrackEvent: {
+    prototype: TrackEvent;
+    new(typeArg: string, eventInitDict?: TrackEventInit): TrackEvent;
+};
+
+interface TransitionEvent extends Event {
+    readonly elapsedTime: number;
+    readonly propertyName: string;
+    initTransitionEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, propertyNameArg: string, elapsedTimeArg: number): void;
+}
+
+declare var TransitionEvent: {
+    prototype: TransitionEvent;
+    new(typeArg: string, eventInitDict?: TransitionEventInit): TransitionEvent;
+};
+
+interface TreeWalker {
+    currentNode: Node;
+    readonly expandEntityReferences: boolean;
+    readonly filter: NodeFilter;
+    readonly root: Node;
+    readonly whatToShow: number;
+    firstChild(): Node;
+    lastChild(): Node;
+    nextNode(): Node;
+    nextSibling(): Node;
+    parentNode(): Node;
+    previousNode(): Node;
+    previousSibling(): Node;
+}
+
+declare var TreeWalker: {
+    prototype: TreeWalker;
+    new(): TreeWalker;
+};
+
+interface UIEvent extends Event {
+    readonly detail: number;
+    readonly view: Window;
+    initUIEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number): void;
+}
+
+declare var UIEvent: {
+    prototype: UIEvent;
+    new(typeArg: string, eventInitDict?: UIEventInit): UIEvent;
+};
+
+interface UnviewableContentIdentifiedEvent extends NavigationEventWithReferrer {
+    readonly mediaType: string;
+}
+
+declare var UnviewableContentIdentifiedEvent: {
+    prototype: UnviewableContentIdentifiedEvent;
+    new(): UnviewableContentIdentifiedEvent;
+};
+
+interface URL {
+    hash: string;
+    host: string;
+    hostname: string;
+    href: string;
+    readonly origin: string;
+    password: string;
+    pathname: string;
+    port: string;
+    protocol: string;
+    search: string;
+    username: string;
+    readonly searchParams: URLSearchParams;
+    toString(): string;
+}
+
+declare var URL: {
+    prototype: URL;
+    new(url: string, base?: string): URL;
+    createObjectURL(object: any, options?: ObjectURLOptions): string;
+    revokeObjectURL(url: string): void;
+};
+
+interface ValidityState {
+    readonly badInput: boolean;
+    readonly customError: boolean;
+    readonly patternMismatch: boolean;
+    readonly rangeOverflow: boolean;
+    readonly rangeUnderflow: boolean;
+    readonly stepMismatch: boolean;
+    readonly tooLong: boolean;
+    readonly typeMismatch: boolean;
+    readonly valid: boolean;
+    readonly valueMissing: boolean;
+}
+
+declare var ValidityState: {
+    prototype: ValidityState;
+    new(): ValidityState;
+};
+
+interface VideoPlaybackQuality {
+    readonly corruptedVideoFrames: number;
+    readonly creationTime: number;
+    readonly droppedVideoFrames: number;
+    readonly totalFrameDelay: number;
+    readonly totalVideoFrames: number;
+}
+
+declare var VideoPlaybackQuality: {
+    prototype: VideoPlaybackQuality;
+    new(): VideoPlaybackQuality;
+};
+
+interface VideoTrack {
+    readonly id: string;
+    kind: string;
+    readonly label: string;
+    language: string;
+    selected: boolean;
+    readonly sourceBuffer: SourceBuffer;
+}
+
+declare var VideoTrack: {
+    prototype: VideoTrack;
+    new(): VideoTrack;
+};
+
+interface VideoTrackListEventMap {
+    "addtrack": TrackEvent;
+    "change": Event;
+    "removetrack": TrackEvent;
+}
+
+interface VideoTrackList extends EventTarget {
+    readonly length: number;
+    onaddtrack: (this: VideoTrackList, ev: TrackEvent) => any;
+    onchange: (this: VideoTrackList, ev: Event) => any;
+    onremovetrack: (this: VideoTrackList, ev: TrackEvent) => any;
+    readonly selectedIndex: number;
+    getTrackById(id: string): VideoTrack | null;
+    item(index: number): VideoTrack;
+    addEventListener<K extends keyof VideoTrackListEventMap>(type: K, listener: (this: VideoTrackList, ev: VideoTrackListEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+    [index: number]: VideoTrack;
+}
+
+declare var VideoTrackList: {
+    prototype: VideoTrackList;
+    new(): VideoTrackList;
+};
+
+interface WaveShaperNode extends AudioNode {
+    curve: Float32Array | null;
+    oversample: OverSampleType;
+}
+
+declare var WaveShaperNode: {
+    prototype: WaveShaperNode;
+    new(): WaveShaperNode;
+};
+
+interface WebAuthentication {
+    getAssertion(assertionChallenge: any, options?: AssertionOptions): Promise<WebAuthnAssertion>;
+    makeCredential(accountInformation: Account, cryptoParameters: ScopedCredentialParameters[], attestationChallenge: any, options?: ScopedCredentialOptions): Promise<ScopedCredentialInfo>;
+}
+
+declare var WebAuthentication: {
+    prototype: WebAuthentication;
+    new(): WebAuthentication;
+};
+
+interface WebAuthnAssertion {
+    readonly authenticatorData: ArrayBuffer;
+    readonly clientData: ArrayBuffer;
+    readonly credential: ScopedCredential;
+    readonly signature: ArrayBuffer;
+}
+
+declare var WebAuthnAssertion: {
+    prototype: WebAuthnAssertion;
+    new(): WebAuthnAssertion;
+};
+
+interface WEBGL_compressed_texture_s3tc {
+    readonly COMPRESSED_RGB_S3TC_DXT1_EXT: number;
+    readonly COMPRESSED_RGBA_S3TC_DXT1_EXT: number;
+    readonly COMPRESSED_RGBA_S3TC_DXT3_EXT: number;
+    readonly COMPRESSED_RGBA_S3TC_DXT5_EXT: number;
+}
+
+declare var WEBGL_compressed_texture_s3tc: {
+    prototype: WEBGL_compressed_texture_s3tc;
+    new(): WEBGL_compressed_texture_s3tc;
+    readonly COMPRESSED_RGB_S3TC_DXT1_EXT: number;
+    readonly COMPRESSED_RGBA_S3TC_DXT1_EXT: number;
+    readonly COMPRESSED_RGBA_S3TC_DXT3_EXT: number;
+    readonly COMPRESSED_RGBA_S3TC_DXT5_EXT: number;
+};
+
+interface WEBGL_debug_renderer_info {
+    readonly UNMASKED_RENDERER_WEBGL: number;
+    readonly UNMASKED_VENDOR_WEBGL: number;
+}
+
+declare var WEBGL_debug_renderer_info: {
+    prototype: WEBGL_debug_renderer_info;
+    new(): WEBGL_debug_renderer_info;
+    readonly UNMASKED_RENDERER_WEBGL: number;
+    readonly UNMASKED_VENDOR_WEBGL: number;
+};
+
+interface WEBGL_depth_texture {
+    readonly UNSIGNED_INT_24_8_WEBGL: number;
+}
+
+declare var WEBGL_depth_texture: {
+    prototype: WEBGL_depth_texture;
+    new(): WEBGL_depth_texture;
+    readonly UNSIGNED_INT_24_8_WEBGL: number;
+};
+
+interface WebGLActiveInfo {
+    readonly name: string;
+    readonly size: number;
+    readonly type: number;
+}
+
+declare var WebGLActiveInfo: {
+    prototype: WebGLActiveInfo;
+    new(): WebGLActiveInfo;
+};
+
+interface WebGLBuffer extends WebGLObject {
+}
+
+declare var WebGLBuffer: {
+    prototype: WebGLBuffer;
+    new(): WebGLBuffer;
+};
+
+interface WebGLContextEvent extends Event {
+    readonly statusMessage: string;
+}
+
+declare var WebGLContextEvent: {
+    prototype: WebGLContextEvent;
+    new(typeArg: string, eventInitDict?: WebGLContextEventInit): WebGLContextEvent;
+};
+
+interface WebGLFramebuffer extends WebGLObject {
+}
+
+declare var WebGLFramebuffer: {
+    prototype: WebGLFramebuffer;
+    new(): WebGLFramebuffer;
+};
+
+interface WebGLObject {
+}
+
+declare var WebGLObject: {
+    prototype: WebGLObject;
+    new(): WebGLObject;
+};
+
+interface WebGLProgram extends WebGLObject {
+}
+
+declare var WebGLProgram: {
+    prototype: WebGLProgram;
+    new(): WebGLProgram;
+};
+
+interface WebGLRenderbuffer extends WebGLObject {
+}
+
+declare var WebGLRenderbuffer: {
+    prototype: WebGLRenderbuffer;
+    new(): WebGLRenderbuffer;
+};
+
+interface WebGLRenderingContext {
+    readonly canvas: HTMLCanvasElement;
+    readonly drawingBufferHeight: number;
+    readonly drawingBufferWidth: number;
+    activeTexture(texture: number): void;
+    attachShader(program: WebGLProgram | null, shader: WebGLShader | null): void;
+    bindAttribLocation(program: WebGLProgram | null, index: number, name: string): void;
+    bindBuffer(target: number, buffer: WebGLBuffer | null): void;
+    bindFramebuffer(target: number, framebuffer: WebGLFramebuffer | null): void;
+    bindRenderbuffer(target: number, renderbuffer: WebGLRenderbuffer | null): void;
+    bindTexture(target: number, texture: WebGLTexture | null): void;
+    blendColor(red: number, green: number, blue: number, alpha: number): void;
+    blendEquation(mode: number): void;
+    blendEquationSeparate(modeRGB: number, modeAlpha: number): void;
+    blendFunc(sfactor: number, dfactor: number): void;
+    blendFuncSeparate(srcRGB: number, dstRGB: number, srcAlpha: number, dstAlpha: number): void;
+    bufferData(target: number, size: number | ArrayBufferView | ArrayBuffer, usage: number): void;
+    bufferSubData(target: number, offset: number, data: ArrayBufferView | ArrayBuffer): void;
+    checkFramebufferStatus(target: number): number;
+    clear(mask: number): void;
+    clearColor(red: number, green: number, blue: number, alpha: number): void;
+    clearDepth(depth: number): void;
+    clearStencil(s: number): void;
+    colorMask(red: boolean, green: boolean, blue: boolean, alpha: boolean): void;
+    compileShader(shader: WebGLShader | null): void;
+    compressedTexImage2D(target: number, level: number, internalformat: number, width: number, height: number, border: number, data: ArrayBufferView): void;
+    compressedTexSubImage2D(target: number, level: number, xoffset: number, yoffset: number, width: number, height: number, format: number, data: ArrayBufferView): void;
+    copyTexImage2D(target: number, level: number, internalformat: number, x: number, y: number, width: number, height: number, border: number): void;
+    copyTexSubImage2D(target: number, level: number, xoffset: number, yoffset: number, x: number, y: number, width: number, height: number): void;
+    createBuffer(): WebGLBuffer | null;
+    createFramebuffer(): WebGLFramebuffer | null;
+    createProgram(): WebGLProgram | null;
+    createRenderbuffer(): WebGLRenderbuffer | null;
+    createShader(type: number): WebGLShader | null;
+    createTexture(): WebGLTexture | null;
+    cullFace(mode: number): void;
+    deleteBuffer(buffer: WebGLBuffer | null): void;
+    deleteFramebuffer(framebuffer: WebGLFramebuffer | null): void;
+    deleteProgram(program: WebGLProgram | null): void;
+    deleteRenderbuffer(renderbuffer: WebGLRenderbuffer | null): void;
+    deleteShader(shader: WebGLShader | null): void;
+    deleteTexture(texture: WebGLTexture | null): void;
+    depthFunc(func: number): void;
+    depthMask(flag: boolean): void;
+    depthRange(zNear: number, zFar: number): void;
+    detachShader(program: WebGLProgram | null, shader: WebGLShader | null): void;
+    disable(cap: number): void;
+    disableVertexAttribArray(index: number): void;
+    drawArrays(mode: number, first: number, count: number): void;
+    drawElements(mode: number, count: number, type: number, offset: number): void;
+    enable(cap: number): void;
+    enableVertexAttribArray(index: number): void;
+    finish(): void;
+    flush(): void;
+    framebufferRenderbuffer(target: number, attachment: number, renderbuffertarget: number, renderbuffer: WebGLRenderbuffer | null): void;
+    framebufferTexture2D(target: number, attachment: number, textarget: number, texture: WebGLTexture | null, level: number): void;
+    frontFace(mode: number): void;
+    generateMipmap(target: number): void;
+    getActiveAttrib(program: WebGLProgram | null, index: number): WebGLActiveInfo | null;
+    getActiveUniform(program: WebGLProgram | null, index: number): WebGLActiveInfo | null;
+    getAttachedShaders(program: WebGLProgram | null): WebGLShader[] | null;
+    getAttribLocation(program: WebGLProgram | null, name: string): number;
+    getBufferParameter(target: number, pname: number): any;
+    getContextAttributes(): WebGLContextAttributes;
+    getError(): number;
+    getExtension(name: string): any;
+    getFramebufferAttachmentParameter(target: number, attachment: number, pname: number): any;
+    getParameter(pname: number): any;
+    getProgramInfoLog(program: WebGLProgram | null): string | null;
+    getProgramParameter(program: WebGLProgram | null, pname: number): any;
+    getRenderbufferParameter(target: number, pname: number): any;
+    getShaderInfoLog(shader: WebGLShader | null): string | null;
+    getShaderParameter(shader: WebGLShader | null, pname: number): any;
+    getShaderPrecisionFormat(shadertype: number, precisiontype: number): WebGLShaderPrecisionFormat | null;
+    getShaderSource(shader: WebGLShader | null): string | null;
+    getSupportedExtensions(): string[] | null;
+    getTexParameter(target: number, pname: number): any;
+    getUniform(program: WebGLProgram | null, location: WebGLUniformLocation | null): any;
+    getUniformLocation(program: WebGLProgram | null, name: string): WebGLUniformLocation | null;
+    getVertexAttrib(index: number, pname: number): any;
+    getVertexAttribOffset(index: number, pname: number): number;
+    hint(target: number, mode: number): void;
+    isBuffer(buffer: WebGLBuffer | null): boolean;
+    isContextLost(): boolean;
+    isEnabled(cap: number): boolean;
+    isFramebuffer(framebuffer: WebGLFramebuffer | null): boolean;
+    isProgram(program: WebGLProgram | null): boolean;
+    isRenderbuffer(renderbuffer: WebGLRenderbuffer | null): boolean;
+    isShader(shader: WebGLShader | null): boolean;
+    isTexture(texture: WebGLTexture | null): boolean;
+    lineWidth(width: number): void;
+    linkProgram(program: WebGLProgram | null): void;
+    pixelStorei(pname: number, param: number | boolean): void;
+    polygonOffset(factor: number, units: number): void;
+    readPixels(x: number, y: number, width: number, height: number, format: number, type: number, pixels: ArrayBufferView | null): void;
+    renderbufferStorage(target: number, internalformat: number, width: number, height: number): void;
+    sampleCoverage(value: number, invert: boolean): void;
+    scissor(x: number, y: number, width: number, height: number): void;
+    shaderSource(shader: WebGLShader | null, source: string): void;
+    stencilFunc(func: number, ref: number, mask: number): void;
+    stencilFuncSeparate(face: number, func: number, ref: number, mask: number): void;
+    stencilMask(mask: number): void;
+    stencilMaskSeparate(face: number, mask: number): void;
+    stencilOp(fail: number, zfail: number, zpass: number): void;
+    stencilOpSeparate(face: number, fail: number, zfail: number, zpass: number): void;
+    texImage2D(target: number, level: number, internalformat: number, width: number, height: number, border: number, format: number, type: number, pixels: ArrayBufferView | null): void;
+    texImage2D(target: number, level: number, internalformat: number, format: number, type: number, pixels: ImageBitmap | ImageData | HTMLVideoElement | HTMLImageElement | HTMLCanvasElement): void;
+    texParameterf(target: number, pname: number, param: number): void;
+    texParameteri(target: number, pname: number, param: number): void;
+    texSubImage2D(target: number, level: number, xoffset: number, yoffset: number, width: number, height: number, format: number, type: number, pixels: ArrayBufferView | null): void;
+    texSubImage2D(target: number, level: number, xoffset: number, yoffset: number, format: number, type: number, pixels: ImageBitmap | ImageData | HTMLVideoElement | HTMLImageElement | HTMLCanvasElement): void;
+    uniform1f(location: WebGLUniformLocation | null, x: number): void;
+    uniform1fv(location: WebGLUniformLocation, v: Float32Array | number[]): void;
+    uniform1i(location: WebGLUniformLocation | null, x: number): void;
+    uniform1iv(location: WebGLUniformLocation, v: Int32Array | number[]): void;
+    uniform2f(location: WebGLUniformLocation | null, x: number, y: number): void;
+    uniform2fv(location: WebGLUniformLocation, v: Float32Array | number[]): void;
+    uniform2i(location: WebGLUniformLocation | null, x: number, y: number): void;
+    uniform2iv(location: WebGLUniformLocation, v: Int32Array | number[]): void;
+    uniform3f(location: WebGLUniformLocation | null, x: number, y: number, z: number): void;
+    uniform3fv(location: WebGLUniformLocation, v: Float32Array | number[]): void;
+    uniform3i(location: WebGLUniformLocation | null, x: number, y: number, z: number): void;
+    uniform3iv(location: WebGLUniformLocation, v: Int32Array | number[]): void;
+    uniform4f(location: WebGLUniformLocation | null, x: number, y: number, z: number, w: number): void;
+    uniform4fv(location: WebGLUniformLocation, v: Float32Array | number[]): void;
+    uniform4i(location: WebGLUniformLocation | null, x: number, y: number, z: number, w: number): void;
+    uniform4iv(location: WebGLUniformLocation, v: Int32Array | number[]): void;
+    uniformMatrix2fv(location: WebGLUniformLocation, transpose: boolean, value: Float32Array | number[]): void;
+    uniformMatrix3fv(location: WebGLUniformLocation, transpose: boolean, value: Float32Array | number[]): void;
+    uniformMatrix4fv(location: WebGLUniformLocation, transpose: boolean, value: Float32Array | number[]): void;
+    useProgram(program: WebGLProgram | null): void;
+    validateProgram(program: WebGLProgram | null): void;
+    vertexAttrib1f(indx: number, x: number): void;
+    vertexAttrib1fv(indx: number, values: Float32Array | number[]): void;
+    vertexAttrib2f(indx: number, x: number, y: number): void;
+    vertexAttrib2fv(indx: number, values: Float32Array | number[]): void;
+    vertexAttrib3f(indx: number, x: number, y: number, z: number): void;
+    vertexAttrib3fv(indx: number, values: Float32Array | number[]): void;
+    vertexAttrib4f(indx: number, x: number, y: number, z: number, w: number): void;
+    vertexAttrib4fv(indx: number, values: Float32Array | number[]): void;
+    vertexAttribPointer(indx: number, size: number, type: number, normalized: boolean, stride: number, offset: number): void;
+    viewport(x: number, y: number, width: number, height: number): void;
+    readonly ACTIVE_ATTRIBUTES: number;
+    readonly ACTIVE_TEXTURE: number;
+    readonly ACTIVE_UNIFORMS: number;
+    readonly ALIASED_LINE_WIDTH_RANGE: number;
+    readonly ALIASED_POINT_SIZE_RANGE: number;
+    readonly ALPHA: number;
+    readonly ALPHA_BITS: number;
+    readonly ALWAYS: number;
+    readonly ARRAY_BUFFER: number;
+    readonly ARRAY_BUFFER_BINDING: number;
+    readonly ATTACHED_SHADERS: number;
+    readonly BACK: number;
+    readonly BLEND: number;
+    readonly BLEND_COLOR: number;
+    readonly BLEND_DST_ALPHA: number;
+    readonly BLEND_DST_RGB: number;
+    readonly BLEND_EQUATION: number;
+    readonly BLEND_EQUATION_ALPHA: number;
+    readonly BLEND_EQUATION_RGB: number;
+    readonly BLEND_SRC_ALPHA: number;
+    readonly BLEND_SRC_RGB: number;
+    readonly BLUE_BITS: number;
+    readonly BOOL: number;
+    readonly BOOL_VEC2: number;
+    readonly BOOL_VEC3: number;
+    readonly BOOL_VEC4: number;
+    readonly BROWSER_DEFAULT_WEBGL: number;
+    readonly BUFFER_SIZE: number;
+    readonly BUFFER_USAGE: number;
+    readonly BYTE: number;
+    readonly CCW: number;
+    readonly CLAMP_TO_EDGE: number;
+    readonly COLOR_ATTACHMENT0: number;
+    readonly COLOR_BUFFER_BIT: number;
+    readonly COLOR_CLEAR_VALUE: number;
+    readonly COLOR_WRITEMASK: number;
+    readonly COMPILE_STATUS: number;
+    readonly COMPRESSED_TEXTURE_FORMATS: number;
+    readonly CONSTANT_ALPHA: number;
+    readonly CONSTANT_COLOR: number;
+    readonly CONTEXT_LOST_WEBGL: number;
+    readonly CULL_FACE: number;
+    readonly CULL_FACE_MODE: number;
+    readonly CURRENT_PROGRAM: number;
+    readonly CURRENT_VERTEX_ATTRIB: number;
+    readonly CW: number;
+    readonly DECR: number;
+    readonly DECR_WRAP: number;
+    readonly DELETE_STATUS: number;
+    readonly DEPTH_ATTACHMENT: number;
+    readonly DEPTH_BITS: number;
+    readonly DEPTH_BUFFER_BIT: number;
+    readonly DEPTH_CLEAR_VALUE: number;
+    readonly DEPTH_COMPONENT: number;
+    readonly DEPTH_COMPONENT16: number;
+    readonly DEPTH_FUNC: number;
+    readonly DEPTH_RANGE: number;
+    readonly DEPTH_STENCIL: number;
+    readonly DEPTH_STENCIL_ATTACHMENT: number;
+    readonly DEPTH_TEST: number;
+    readonly DEPTH_WRITEMASK: number;
+    readonly DITHER: number;
+    readonly DONT_CARE: number;
+    readonly DST_ALPHA: number;
+    readonly DST_COLOR: number;
+    readonly DYNAMIC_DRAW: number;
+    readonly ELEMENT_ARRAY_BUFFER: number;
+    readonly ELEMENT_ARRAY_BUFFER_BINDING: number;
+    readonly EQUAL: number;
+    readonly FASTEST: number;
+    readonly FLOAT: number;
+    readonly FLOAT_MAT2: number;
+    readonly FLOAT_MAT3: number;
+    readonly FLOAT_MAT4: number;
+    readonly FLOAT_VEC2: number;
+    readonly FLOAT_VEC3: number;
+    readonly FLOAT_VEC4: number;
+    readonly FRAGMENT_SHADER: number;
+    readonly FRAMEBUFFER: number;
+    readonly FRAMEBUFFER_ATTACHMENT_OBJECT_NAME: number;
+    readonly FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE: number;
+    readonly FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE: number;
+    readonly FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL: number;
+    readonly FRAMEBUFFER_BINDING: number;
+    readonly FRAMEBUFFER_COMPLETE: number;
+    readonly FRAMEBUFFER_INCOMPLETE_ATTACHMENT: number;
+    readonly FRAMEBUFFER_INCOMPLETE_DIMENSIONS: number;
+    readonly FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT: number;
+    readonly FRAMEBUFFER_UNSUPPORTED: number;
+    readonly FRONT: number;
+    readonly FRONT_AND_BACK: number;
+    readonly FRONT_FACE: number;
+    readonly FUNC_ADD: number;
+    readonly FUNC_REVERSE_SUBTRACT: number;
+    readonly FUNC_SUBTRACT: number;
+    readonly GENERATE_MIPMAP_HINT: number;
+    readonly GEQUAL: number;
+    readonly GREATER: number;
+    readonly GREEN_BITS: number;
+    readonly HIGH_FLOAT: number;
+    readonly HIGH_INT: number;
+    readonly IMPLEMENTATION_COLOR_READ_FORMAT: number;
+    readonly IMPLEMENTATION_COLOR_READ_TYPE: number;
+    readonly INCR: number;
+    readonly INCR_WRAP: number;
+    readonly INT: number;
+    readonly INT_VEC2: number;
+    readonly INT_VEC3: number;
+    readonly INT_VEC4: number;
+    readonly INVALID_ENUM: number;
+    readonly INVALID_FRAMEBUFFER_OPERATION: number;
+    readonly INVALID_OPERATION: number;
+    readonly INVALID_VALUE: number;
+    readonly INVERT: number;
+    readonly KEEP: number;
+    readonly LEQUAL: number;
+    readonly LESS: number;
+    readonly LINE_LOOP: number;
+    readonly LINE_STRIP: number;
+    readonly LINE_WIDTH: number;
+    readonly LINEAR: number;
+    readonly LINEAR_MIPMAP_LINEAR: number;
+    readonly LINEAR_MIPMAP_NEAREST: number;
+    readonly LINES: number;
+    readonly LINK_STATUS: number;
+    readonly LOW_FLOAT: number;
+    readonly LOW_INT: number;
+    readonly LUMINANCE: number;
+    readonly LUMINANCE_ALPHA: number;
+    readonly MAX_COMBINED_TEXTURE_IMAGE_UNITS: number;
+    readonly MAX_CUBE_MAP_TEXTURE_SIZE: number;
+    readonly MAX_FRAGMENT_UNIFORM_VECTORS: number;
+    readonly MAX_RENDERBUFFER_SIZE: number;
+    readonly MAX_TEXTURE_IMAGE_UNITS: number;
+    readonly MAX_TEXTURE_SIZE: number;
+    readonly MAX_VARYING_VECTORS: number;
+    readonly MAX_VERTEX_ATTRIBS: number;
+    readonly MAX_VERTEX_TEXTURE_IMAGE_UNITS: number;
+    readonly MAX_VERTEX_UNIFORM_VECTORS: number;
+    readonly MAX_VIEWPORT_DIMS: number;
+    readonly MEDIUM_FLOAT: number;
+    readonly MEDIUM_INT: number;
+    readonly MIRRORED_REPEAT: number;
+    readonly NEAREST: number;
+    readonly NEAREST_MIPMAP_LINEAR: number;
+    readonly NEAREST_MIPMAP_NEAREST: number;
+    readonly NEVER: number;
+    readonly NICEST: number;
+    readonly NO_ERROR: number;
+    readonly NONE: number;
+    readonly NOTEQUAL: number;
+    readonly ONE: number;
+    readonly ONE_MINUS_CONSTANT_ALPHA: number;
+    readonly ONE_MINUS_CONSTANT_COLOR: number;
+    readonly ONE_MINUS_DST_ALPHA: number;
+    readonly ONE_MINUS_DST_COLOR: number;
+    readonly ONE_MINUS_SRC_ALPHA: number;
+    readonly ONE_MINUS_SRC_COLOR: number;
+    readonly OUT_OF_MEMORY: number;
+    readonly PACK_ALIGNMENT: number;
+    readonly POINTS: number;
+    readonly POLYGON_OFFSET_FACTOR: number;
+    readonly POLYGON_OFFSET_FILL: number;
+    readonly POLYGON_OFFSET_UNITS: number;
+    readonly RED_BITS: number;
+    readonly RENDERBUFFER: number;
+    readonly RENDERBUFFER_ALPHA_SIZE: number;
+    readonly RENDERBUFFER_BINDING: number;
+    readonly RENDERBUFFER_BLUE_SIZE: number;
+    readonly RENDERBUFFER_DEPTH_SIZE: number;
+    readonly RENDERBUFFER_GREEN_SIZE: number;
+    readonly RENDERBUFFER_HEIGHT: number;
+    readonly RENDERBUFFER_INTERNAL_FORMAT: number;
+    readonly RENDERBUFFER_RED_SIZE: number;
+    readonly RENDERBUFFER_STENCIL_SIZE: number;
+    readonly RENDERBUFFER_WIDTH: number;
+    readonly RENDERER: number;
+    readonly REPEAT: number;
+    readonly REPLACE: number;
+    readonly RGB: number;
+    readonly RGB5_A1: number;
+    readonly RGB565: number;
+    readonly RGBA: number;
+    readonly RGBA4: number;
+    readonly SAMPLE_ALPHA_TO_COVERAGE: number;
+    readonly SAMPLE_BUFFERS: number;
+    readonly SAMPLE_COVERAGE: number;
+    readonly SAMPLE_COVERAGE_INVERT: number;
+    readonly SAMPLE_COVERAGE_VALUE: number;
+    readonly SAMPLER_2D: number;
+    readonly SAMPLER_CUBE: number;
+    readonly SAMPLES: number;
+    readonly SCISSOR_BOX: number;
+    readonly SCISSOR_TEST: number;
+    readonly SHADER_TYPE: number;
+    readonly SHADING_LANGUAGE_VERSION: number;
+    readonly SHORT: number;
+    readonly SRC_ALPHA: number;
+    readonly SRC_ALPHA_SATURATE: number;
+    readonly SRC_COLOR: number;
+    readonly STATIC_DRAW: number;
+    readonly STENCIL_ATTACHMENT: number;
+    readonly STENCIL_BACK_FAIL: number;
+    readonly STENCIL_BACK_FUNC: number;
+    readonly STENCIL_BACK_PASS_DEPTH_FAIL: number;
+    readonly STENCIL_BACK_PASS_DEPTH_PASS: number;
+    readonly STENCIL_BACK_REF: number;
+    readonly STENCIL_BACK_VALUE_MASK: number;
+    readonly STENCIL_BACK_WRITEMASK: number;
+    readonly STENCIL_BITS: number;
+    readonly STENCIL_BUFFER_BIT: number;
+    readonly STENCIL_CLEAR_VALUE: number;
+    readonly STENCIL_FAIL: number;
+    readonly STENCIL_FUNC: number;
+    readonly STENCIL_INDEX: number;
+    readonly STENCIL_INDEX8: number;
+    readonly STENCIL_PASS_DEPTH_FAIL: number;
+    readonly STENCIL_PASS_DEPTH_PASS: number;
+    readonly STENCIL_REF: number;
+    readonly STENCIL_TEST: number;
+    readonly STENCIL_VALUE_MASK: number;
+    readonly STENCIL_WRITEMASK: number;
+    readonly STREAM_DRAW: number;
+    readonly SUBPIXEL_BITS: number;
+    readonly TEXTURE: number;
+    readonly TEXTURE_2D: number;
+    readonly TEXTURE_BINDING_2D: number;
+    readonly TEXTURE_BINDING_CUBE_MAP: number;
+    readonly TEXTURE_CUBE_MAP: number;
+    readonly TEXTURE_CUBE_MAP_NEGATIVE_X: number;
+    readonly TEXTURE_CUBE_MAP_NEGATIVE_Y: number;
+    readonly TEXTURE_CUBE_MAP_NEGATIVE_Z: number;
+    readonly TEXTURE_CUBE_MAP_POSITIVE_X: number;
+    readonly TEXTURE_CUBE_MAP_POSITIVE_Y: number;
+    readonly TEXTURE_CUBE_MAP_POSITIVE_Z: number;
+    readonly TEXTURE_MAG_FILTER: number;
+    readonly TEXTURE_MIN_FILTER: number;
+    readonly TEXTURE_WRAP_S: number;
+    readonly TEXTURE_WRAP_T: number;
+    readonly TEXTURE0: number;
+    readonly TEXTURE1: number;
+    readonly TEXTURE10: number;
+    readonly TEXTURE11: number;
+    readonly TEXTURE12: number;
+    readonly TEXTURE13: number;
+    readonly TEXTURE14: number;
+    readonly TEXTURE15: number;
+    readonly TEXTURE16: number;
+    readonly TEXTURE17: number;
+    readonly TEXTURE18: number;
+    readonly TEXTURE19: number;
+    readonly TEXTURE2: number;
+    readonly TEXTURE20: number;
+    readonly TEXTURE21: number;
+    readonly TEXTURE22: number;
+    readonly TEXTURE23: number;
+    readonly TEXTURE24: number;
+    readonly TEXTURE25: number;
+    readonly TEXTURE26: number;
+    readonly TEXTURE27: number;
+    readonly TEXTURE28: number;
+    readonly TEXTURE29: number;
+    readonly TEXTURE3: number;
+    readonly TEXTURE30: number;
+    readonly TEXTURE31: number;
+    readonly TEXTURE4: number;
+    readonly TEXTURE5: number;
+    readonly TEXTURE6: number;
+    readonly TEXTURE7: number;
+    readonly TEXTURE8: number;
+    readonly TEXTURE9: number;
+    readonly TRIANGLE_FAN: number;
+    readonly TRIANGLE_STRIP: number;
+    readonly TRIANGLES: number;
+    readonly UNPACK_ALIGNMENT: number;
+    readonly UNPACK_COLORSPACE_CONVERSION_WEBGL: number;
+    readonly UNPACK_FLIP_Y_WEBGL: number;
+    readonly UNPACK_PREMULTIPLY_ALPHA_WEBGL: number;
+    readonly UNSIGNED_BYTE: number;
+    readonly UNSIGNED_INT: number;
+    readonly UNSIGNED_SHORT: number;
+    readonly UNSIGNED_SHORT_4_4_4_4: number;
+    readonly UNSIGNED_SHORT_5_5_5_1: number;
+    readonly UNSIGNED_SHORT_5_6_5: number;
+    readonly VALIDATE_STATUS: number;
+    readonly VENDOR: number;
+    readonly VERSION: number;
+    readonly VERTEX_ATTRIB_ARRAY_BUFFER_BINDING: number;
+    readonly VERTEX_ATTRIB_ARRAY_ENABLED: number;
+    readonly VERTEX_ATTRIB_ARRAY_NORMALIZED: number;
+    readonly VERTEX_ATTRIB_ARRAY_POINTER: number;
+    readonly VERTEX_ATTRIB_ARRAY_SIZE: number;
+    readonly VERTEX_ATTRIB_ARRAY_STRIDE: number;
+    readonly VERTEX_ATTRIB_ARRAY_TYPE: number;
+    readonly VERTEX_SHADER: number;
+    readonly VIEWPORT: number;
+    readonly ZERO: number;
+}
+
+declare var WebGLRenderingContext: {
+    prototype: WebGLRenderingContext;
+    new(): WebGLRenderingContext;
+    readonly ACTIVE_ATTRIBUTES: number;
+    readonly ACTIVE_TEXTURE: number;
+    readonly ACTIVE_UNIFORMS: number;
+    readonly ALIASED_LINE_WIDTH_RANGE: number;
+    readonly ALIASED_POINT_SIZE_RANGE: number;
+    readonly ALPHA: number;
+    readonly ALPHA_BITS: number;
+    readonly ALWAYS: number;
+    readonly ARRAY_BUFFER: number;
+    readonly ARRAY_BUFFER_BINDING: number;
+    readonly ATTACHED_SHADERS: number;
+    readonly BACK: number;
+    readonly BLEND: number;
+    readonly BLEND_COLOR: number;
+    readonly BLEND_DST_ALPHA: number;
+    readonly BLEND_DST_RGB: number;
+    readonly BLEND_EQUATION: number;
+    readonly BLEND_EQUATION_ALPHA: number;
+    readonly BLEND_EQUATION_RGB: number;
+    readonly BLEND_SRC_ALPHA: number;
+    readonly BLEND_SRC_RGB: number;
+    readonly BLUE_BITS: number;
+    readonly BOOL: number;
+    readonly BOOL_VEC2: number;
+    readonly BOOL_VEC3: number;
+    readonly BOOL_VEC4: number;
+    readonly BROWSER_DEFAULT_WEBGL: number;
+    readonly BUFFER_SIZE: number;
+    readonly BUFFER_USAGE: number;
+    readonly BYTE: number;
+    readonly CCW: number;
+    readonly CLAMP_TO_EDGE: number;
+    readonly COLOR_ATTACHMENT0: number;
+    readonly COLOR_BUFFER_BIT: number;
+    readonly COLOR_CLEAR_VALUE: number;
+    readonly COLOR_WRITEMASK: number;
+    readonly COMPILE_STATUS: number;
+    readonly COMPRESSED_TEXTURE_FORMATS: number;
+    readonly CONSTANT_ALPHA: number;
+    readonly CONSTANT_COLOR: number;
+    readonly CONTEXT_LOST_WEBGL: number;
+    readonly CULL_FACE: number;
+    readonly CULL_FACE_MODE: number;
+    readonly CURRENT_PROGRAM: number;
+    readonly CURRENT_VERTEX_ATTRIB: number;
+    readonly CW: number;
+    readonly DECR: number;
+    readonly DECR_WRAP: number;
+    readonly DELETE_STATUS: number;
+    readonly DEPTH_ATTACHMENT: number;
+    readonly DEPTH_BITS: number;
+    readonly DEPTH_BUFFER_BIT: number;
+    readonly DEPTH_CLEAR_VALUE: number;
+    readonly DEPTH_COMPONENT: number;
+    readonly DEPTH_COMPONENT16: number;
+    readonly DEPTH_FUNC: number;
+    readonly DEPTH_RANGE: number;
+    readonly DEPTH_STENCIL: number;
+    readonly DEPTH_STENCIL_ATTACHMENT: number;
+    readonly DEPTH_TEST: number;
+    readonly DEPTH_WRITEMASK: number;
+    readonly DITHER: number;
+    readonly DONT_CARE: number;
+    readonly DST_ALPHA: number;
+    readonly DST_COLOR: number;
+    readonly DYNAMIC_DRAW: number;
+    readonly ELEMENT_ARRAY_BUFFER: number;
+    readonly ELEMENT_ARRAY_BUFFER_BINDING: number;
+    readonly EQUAL: number;
+    readonly FASTEST: number;
+    readonly FLOAT: number;
+    readonly FLOAT_MAT2: number;
+    readonly FLOAT_MAT3: number;
+    readonly FLOAT_MAT4: number;
+    readonly FLOAT_VEC2: number;
+    readonly FLOAT_VEC3: number;
+    readonly FLOAT_VEC4: number;
+    readonly FRAGMENT_SHADER: number;
+    readonly FRAMEBUFFER: number;
+    readonly FRAMEBUFFER_ATTACHMENT_OBJECT_NAME: number;
+    readonly FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE: number;
+    readonly FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE: number;
+    readonly FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL: number;
+    readonly FRAMEBUFFER_BINDING: number;
+    readonly FRAMEBUFFER_COMPLETE: number;
+    readonly FRAMEBUFFER_INCOMPLETE_ATTACHMENT: number;
+    readonly FRAMEBUFFER_INCOMPLETE_DIMENSIONS: number;
+    readonly FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT: number;
+    readonly FRAMEBUFFER_UNSUPPORTED: number;
+    readonly FRONT: number;
+    readonly FRONT_AND_BACK: number;
+    readonly FRONT_FACE: number;
+    readonly FUNC_ADD: number;
+    readonly FUNC_REVERSE_SUBTRACT: number;
+    readonly FUNC_SUBTRACT: number;
+    readonly GENERATE_MIPMAP_HINT: number;
+    readonly GEQUAL: number;
+    readonly GREATER: number;
+    readonly GREEN_BITS: number;
+    readonly HIGH_FLOAT: number;
+    readonly HIGH_INT: number;
+    readonly IMPLEMENTATION_COLOR_READ_FORMAT: number;
+    readonly IMPLEMENTATION_COLOR_READ_TYPE: number;
+    readonly INCR: number;
+    readonly INCR_WRAP: number;
+    readonly INT: number;
+    readonly INT_VEC2: number;
+    readonly INT_VEC3: number;
+    readonly INT_VEC4: number;
+    readonly INVALID_ENUM: number;
+    readonly INVALID_FRAMEBUFFER_OPERATION: number;
+    readonly INVALID_OPERATION: number;
+    readonly INVALID_VALUE: number;
+    readonly INVERT: number;
+    readonly KEEP: number;
+    readonly LEQUAL: number;
+    readonly LESS: number;
+    readonly LINE_LOOP: number;
+    readonly LINE_STRIP: number;
+    readonly LINE_WIDTH: number;
+    readonly LINEAR: number;
+    readonly LINEAR_MIPMAP_LINEAR: number;
+    readonly LINEAR_MIPMAP_NEAREST: number;
+    readonly LINES: number;
+    readonly LINK_STATUS: number;
+    readonly LOW_FLOAT: number;
+    readonly LOW_INT: number;
+    readonly LUMINANCE: number;
+    readonly LUMINANCE_ALPHA: number;
+    readonly MAX_COMBINED_TEXTURE_IMAGE_UNITS: number;
+    readonly MAX_CUBE_MAP_TEXTURE_SIZE: number;
+    readonly MAX_FRAGMENT_UNIFORM_VECTORS: number;
+    readonly MAX_RENDERBUFFER_SIZE: number;
+    readonly MAX_TEXTURE_IMAGE_UNITS: number;
+    readonly MAX_TEXTURE_SIZE: number;
+    readonly MAX_VARYING_VECTORS: number;
+    readonly MAX_VERTEX_ATTRIBS: number;
+    readonly MAX_VERTEX_TEXTURE_IMAGE_UNITS: number;
+    readonly MAX_VERTEX_UNIFORM_VECTORS: number;
+    readonly MAX_VIEWPORT_DIMS: number;
+    readonly MEDIUM_FLOAT: number;
+    readonly MEDIUM_INT: number;
+    readonly MIRRORED_REPEAT: number;
+    readonly NEAREST: number;
+    readonly NEAREST_MIPMAP_LINEAR: number;
+    readonly NEAREST_MIPMAP_NEAREST: number;
+    readonly NEVER: number;
+    readonly NICEST: number;
+    readonly NO_ERROR: number;
+    readonly NONE: number;
+    readonly NOTEQUAL: number;
+    readonly ONE: number;
+    readonly ONE_MINUS_CONSTANT_ALPHA: number;
+    readonly ONE_MINUS_CONSTANT_COLOR: number;
+    readonly ONE_MINUS_DST_ALPHA: number;
+    readonly ONE_MINUS_DST_COLOR: number;
+    readonly ONE_MINUS_SRC_ALPHA: number;
+    readonly ONE_MINUS_SRC_COLOR: number;
+    readonly OUT_OF_MEMORY: number;
+    readonly PACK_ALIGNMENT: number;
+    readonly POINTS: number;
+    readonly POLYGON_OFFSET_FACTOR: number;
+    readonly POLYGON_OFFSET_FILL: number;
+    readonly POLYGON_OFFSET_UNITS: number;
+    readonly RED_BITS: number;
+    readonly RENDERBUFFER: number;
+    readonly RENDERBUFFER_ALPHA_SIZE: number;
+    readonly RENDERBUFFER_BINDING: number;
+    readonly RENDERBUFFER_BLUE_SIZE: number;
+    readonly RENDERBUFFER_DEPTH_SIZE: number;
+    readonly RENDERBUFFER_GREEN_SIZE: number;
+    readonly RENDERBUFFER_HEIGHT: number;
+    readonly RENDERBUFFER_INTERNAL_FORMAT: number;
+    readonly RENDERBUFFER_RED_SIZE: number;
+    readonly RENDERBUFFER_STENCIL_SIZE: number;
+    readonly RENDERBUFFER_WIDTH: number;
+    readonly RENDERER: number;
+    readonly REPEAT: number;
+    readonly REPLACE: number;
+    readonly RGB: number;
+    readonly RGB5_A1: number;
+    readonly RGB565: number;
+    readonly RGBA: number;
+    readonly RGBA4: number;
+    readonly SAMPLE_ALPHA_TO_COVERAGE: number;
+    readonly SAMPLE_BUFFERS: number;
+    readonly SAMPLE_COVERAGE: number;
+    readonly SAMPLE_COVERAGE_INVERT: number;
+    readonly SAMPLE_COVERAGE_VALUE: number;
+    readonly SAMPLER_2D: number;
+    readonly SAMPLER_CUBE: number;
+    readonly SAMPLES: number;
+    readonly SCISSOR_BOX: number;
+    readonly SCISSOR_TEST: number;
+    readonly SHADER_TYPE: number;
+    readonly SHADING_LANGUAGE_VERSION: number;
+    readonly SHORT: number;
+    readonly SRC_ALPHA: number;
+    readonly SRC_ALPHA_SATURATE: number;
+    readonly SRC_COLOR: number;
+    readonly STATIC_DRAW: number;
+    readonly STENCIL_ATTACHMENT: number;
+    readonly STENCIL_BACK_FAIL: number;
+    readonly STENCIL_BACK_FUNC: number;
+    readonly STENCIL_BACK_PASS_DEPTH_FAIL: number;
+    readonly STENCIL_BACK_PASS_DEPTH_PASS: number;
+    readonly STENCIL_BACK_REF: number;
+    readonly STENCIL_BACK_VALUE_MASK: number;
+    readonly STENCIL_BACK_WRITEMASK: number;
+    readonly STENCIL_BITS: number;
+    readonly STENCIL_BUFFER_BIT: number;
+    readonly STENCIL_CLEAR_VALUE: number;
+    readonly STENCIL_FAIL: number;
+    readonly STENCIL_FUNC: number;
+    readonly STENCIL_INDEX: number;
+    readonly STENCIL_INDEX8: number;
+    readonly STENCIL_PASS_DEPTH_FAIL: number;
+    readonly STENCIL_PASS_DEPTH_PASS: number;
+    readonly STENCIL_REF: number;
+    readonly STENCIL_TEST: number;
+    readonly STENCIL_VALUE_MASK: number;
+    readonly STENCIL_WRITEMASK: number;
+    readonly STREAM_DRAW: number;
+    readonly SUBPIXEL_BITS: number;
+    readonly TEXTURE: number;
+    readonly TEXTURE_2D: number;
+    readonly TEXTURE_BINDING_2D: number;
+    readonly TEXTURE_BINDING_CUBE_MAP: number;
+    readonly TEXTURE_CUBE_MAP: number;
+    readonly TEXTURE_CUBE_MAP_NEGATIVE_X: number;
+    readonly TEXTURE_CUBE_MAP_NEGATIVE_Y: number;
+    readonly TEXTURE_CUBE_MAP_NEGATIVE_Z: number;
+    readonly TEXTURE_CUBE_MAP_POSITIVE_X: number;
+    readonly TEXTURE_CUBE_MAP_POSITIVE_Y: number;
+    readonly TEXTURE_CUBE_MAP_POSITIVE_Z: number;
+    readonly TEXTURE_MAG_FILTER: number;
+    readonly TEXTURE_MIN_FILTER: number;
+    readonly TEXTURE_WRAP_S: number;
+    readonly TEXTURE_WRAP_T: number;
+    readonly TEXTURE0: number;
+    readonly TEXTURE1: number;
+    readonly TEXTURE10: number;
+    readonly TEXTURE11: number;
+    readonly TEXTURE12: number;
+    readonly TEXTURE13: number;
+    readonly TEXTURE14: number;
+    readonly TEXTURE15: number;
+    readonly TEXTURE16: number;
+    readonly TEXTURE17: number;
+    readonly TEXTURE18: number;
+    readonly TEXTURE19: number;
+    readonly TEXTURE2: number;
+    readonly TEXTURE20: number;
+    readonly TEXTURE21: number;
+    readonly TEXTURE22: number;
+    readonly TEXTURE23: number;
+    readonly TEXTURE24: number;
+    readonly TEXTURE25: number;
+    readonly TEXTURE26: number;
+    readonly TEXTURE27: number;
+    readonly TEXTURE28: number;
+    readonly TEXTURE29: number;
+    readonly TEXTURE3: number;
+    readonly TEXTURE30: number;
+    readonly TEXTURE31: number;
+    readonly TEXTURE4: number;
+    readonly TEXTURE5: number;
+    readonly TEXTURE6: number;
+    readonly TEXTURE7: number;
+    readonly TEXTURE8: number;
+    readonly TEXTURE9: number;
+    readonly TRIANGLE_FAN: number;
+    readonly TRIANGLE_STRIP: number;
+    readonly TRIANGLES: number;
+    readonly UNPACK_ALIGNMENT: number;
+    readonly UNPACK_COLORSPACE_CONVERSION_WEBGL: number;
+    readonly UNPACK_FLIP_Y_WEBGL: number;
+    readonly UNPACK_PREMULTIPLY_ALPHA_WEBGL: number;
+    readonly UNSIGNED_BYTE: number;
+    readonly UNSIGNED_INT: number;
+    readonly UNSIGNED_SHORT: number;
+    readonly UNSIGNED_SHORT_4_4_4_4: number;
+    readonly UNSIGNED_SHORT_5_5_5_1: number;
+    readonly UNSIGNED_SHORT_5_6_5: number;
+    readonly VALIDATE_STATUS: number;
+    readonly VENDOR: number;
+    readonly VERSION: number;
+    readonly VERTEX_ATTRIB_ARRAY_BUFFER_BINDING: number;
+    readonly VERTEX_ATTRIB_ARRAY_ENABLED: number;
+    readonly VERTEX_ATTRIB_ARRAY_NORMALIZED: number;
+    readonly VERTEX_ATTRIB_ARRAY_POINTER: number;
+    readonly VERTEX_ATTRIB_ARRAY_SIZE: number;
+    readonly VERTEX_ATTRIB_ARRAY_STRIDE: number;
+    readonly VERTEX_ATTRIB_ARRAY_TYPE: number;
+    readonly VERTEX_SHADER: number;
+    readonly VIEWPORT: number;
+    readonly ZERO: number;
+};
+
+interface WebGLShader extends WebGLObject {
+}
+
+declare var WebGLShader: {
+    prototype: WebGLShader;
+    new(): WebGLShader;
+};
+
+interface WebGLShaderPrecisionFormat {
+    readonly precision: number;
+    readonly rangeMax: number;
+    readonly rangeMin: number;
+}
+
+declare var WebGLShaderPrecisionFormat: {
+    prototype: WebGLShaderPrecisionFormat;
+    new(): WebGLShaderPrecisionFormat;
+};
+
+interface WebGLTexture extends WebGLObject {
+}
+
+declare var WebGLTexture: {
+    prototype: WebGLTexture;
+    new(): WebGLTexture;
+};
+
+interface WebGLUniformLocation {
+}
+
+declare var WebGLUniformLocation: {
+    prototype: WebGLUniformLocation;
+    new(): WebGLUniformLocation;
+};
+
+interface WebKitCSSMatrix {
+    a: number;
+    b: number;
+    c: number;
+    d: number;
+    e: number;
+    f: number;
+    m11: number;
+    m12: number;
+    m13: number;
+    m14: number;
+    m21: number;
+    m22: number;
+    m23: number;
+    m24: number;
+    m31: number;
+    m32: number;
+    m33: number;
+    m34: number;
+    m41: number;
+    m42: number;
+    m43: number;
+    m44: number;
+    inverse(): WebKitCSSMatrix;
+    multiply(secondMatrix: WebKitCSSMatrix): WebKitCSSMatrix;
+    rotate(angleX: number, angleY?: number, angleZ?: number): WebKitCSSMatrix;
+    rotateAxisAngle(x: number, y: number, z: number, angle: number): WebKitCSSMatrix;
+    scale(scaleX: number, scaleY?: number, scaleZ?: number): WebKitCSSMatrix;
+    setMatrixValue(value: string): void;
+    skewX(angle: number): WebKitCSSMatrix;
+    skewY(angle: number): WebKitCSSMatrix;
+    toString(): string;
+    translate(x: number, y: number, z?: number): WebKitCSSMatrix;
+}
+
+declare var WebKitCSSMatrix: {
+    prototype: WebKitCSSMatrix;
+    new(text?: string): WebKitCSSMatrix;
+};
+
+interface WebKitDirectoryEntry extends WebKitEntry {
+    createReader(): WebKitDirectoryReader;
+}
+
+declare var WebKitDirectoryEntry: {
+    prototype: WebKitDirectoryEntry;
+    new(): WebKitDirectoryEntry;
+};
+
+interface WebKitDirectoryReader {
+    readEntries(successCallback: WebKitEntriesCallback, errorCallback?: WebKitErrorCallback): void;
+}
+
+declare var WebKitDirectoryReader: {
+    prototype: WebKitDirectoryReader;
+    new(): WebKitDirectoryReader;
+};
+
+interface WebKitEntry {
+    readonly filesystem: WebKitFileSystem;
+    readonly fullPath: string;
+    readonly isDirectory: boolean;
+    readonly isFile: boolean;
+    readonly name: string;
+}
+
+declare var WebKitEntry: {
+    prototype: WebKitEntry;
+    new(): WebKitEntry;
+};
+
+interface WebKitFileEntry extends WebKitEntry {
+    file(successCallback: WebKitFileCallback, errorCallback?: WebKitErrorCallback): void;
+}
+
+declare var WebKitFileEntry: {
+    prototype: WebKitFileEntry;
+    new(): WebKitFileEntry;
+};
+
+interface WebKitFileSystem {
+    readonly name: string;
+    readonly root: WebKitDirectoryEntry;
+}
+
+declare var WebKitFileSystem: {
+    prototype: WebKitFileSystem;
+    new(): WebKitFileSystem;
+};
+
+interface WebKitPoint {
+    x: number;
+    y: number;
+}
+
+declare var WebKitPoint: {
+    prototype: WebKitPoint;
+    new(x?: number, y?: number): WebKitPoint;
+};
+
+interface webkitRTCPeerConnection extends RTCPeerConnection {
+    addEventListener<K extends keyof RTCPeerConnectionEventMap>(type: K, listener: (this: webkitRTCPeerConnection, ev: RTCPeerConnectionEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var webkitRTCPeerConnection: {
+    prototype: webkitRTCPeerConnection;
+    new(configuration: RTCConfiguration): webkitRTCPeerConnection;
+};
+
+interface WebSocketEventMap {
+    "close": CloseEvent;
+    "error": Event;
+    "message": MessageEvent;
+    "open": Event;
+}
+
+interface WebSocket extends EventTarget {
+    binaryType: string;
+    readonly bufferedAmount: number;
+    readonly extensions: string;
+    onclose: (this: WebSocket, ev: CloseEvent) => any;
+    onerror: (this: WebSocket, ev: Event) => any;
+    onmessage: (this: WebSocket, ev: MessageEvent) => any;
+    onopen: (this: WebSocket, ev: Event) => any;
+    readonly protocol: string;
+    readonly readyState: number;
+    readonly url: string;
+    close(code?: number, reason?: string): void;
+    send(data: any): void;
+    readonly CLOSED: number;
+    readonly CLOSING: number;
+    readonly CONNECTING: number;
+    readonly OPEN: number;
+    addEventListener<K extends keyof WebSocketEventMap>(type: K, listener: (this: WebSocket, ev: WebSocketEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var WebSocket: {
+    prototype: WebSocket;
+    new(url: string, protocols?: string | string[]): WebSocket;
+    readonly CLOSED: number;
+    readonly CLOSING: number;
+    readonly CONNECTING: number;
+    readonly OPEN: number;
+};
+
+interface WheelEvent extends MouseEvent {
+    readonly deltaMode: number;
+    readonly deltaX: number;
+    readonly deltaY: number;
+    readonly deltaZ: number;
+    readonly wheelDelta: number;
+    readonly wheelDeltaX: number;
+    readonly wheelDeltaY: number;
+    getCurrentPoint(element: Element): void;
+    initWheelEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, buttonArg: number, relatedTargetArg: EventTarget, modifiersListArg: string, deltaXArg: number, deltaYArg: number, deltaZArg: number, deltaMode: number): void;
+    readonly DOM_DELTA_LINE: number;
+    readonly DOM_DELTA_PAGE: number;
+    readonly DOM_DELTA_PIXEL: number;
+}
+
+declare var WheelEvent: {
+    prototype: WheelEvent;
+    new(typeArg: string, eventInitDict?: WheelEventInit): WheelEvent;
+    readonly DOM_DELTA_LINE: number;
+    readonly DOM_DELTA_PAGE: number;
+    readonly DOM_DELTA_PIXEL: number;
+};
+
+interface WindowEventMap extends GlobalEventHandlersEventMap {
+    "abort": UIEvent;
+    "afterprint": Event;
+    "beforeprint": Event;
+    "beforeunload": BeforeUnloadEvent;
+    "blur": FocusEvent;
+    "canplay": Event;
+    "canplaythrough": Event;
+    "change": Event;
+    "click": MouseEvent;
+    "compassneedscalibration": Event;
+    "contextmenu": PointerEvent;
+    "dblclick": MouseEvent;
+    "devicelight": DeviceLightEvent;
+    "devicemotion": DeviceMotionEvent;
+    "deviceorientation": DeviceOrientationEvent;
+    "drag": DragEvent;
+    "dragend": DragEvent;
+    "dragenter": DragEvent;
+    "dragleave": DragEvent;
+    "dragover": DragEvent;
+    "dragstart": DragEvent;
+    "drop": DragEvent;
+    "durationchange": Event;
+    "emptied": Event;
+    "ended": MediaStreamErrorEvent;
+    "error": ErrorEvent;
+    "focus": FocusEvent;
+    "hashchange": HashChangeEvent;
+    "input": Event;
+    "invalid": Event;
+    "keydown": KeyboardEvent;
+    "keypress": KeyboardEvent;
+    "keyup": KeyboardEvent;
+    "load": Event;
+    "loadeddata": Event;
+    "loadedmetadata": Event;
+    "loadstart": Event;
+    "message": MessageEvent;
+    "mousedown": MouseEvent;
+    "mouseenter": MouseEvent;
+    "mouseleave": MouseEvent;
+    "mousemove": MouseEvent;
+    "mouseout": MouseEvent;
+    "mouseover": MouseEvent;
+    "mouseup": MouseEvent;
+    "mousewheel": WheelEvent;
+    "MSGestureChange": MSGestureEvent;
+    "MSGestureDoubleTap": MSGestureEvent;
+    "MSGestureEnd": MSGestureEvent;
+    "MSGestureHold": MSGestureEvent;
+    "MSGestureStart": MSGestureEvent;
+    "MSGestureTap": MSGestureEvent;
+    "MSInertiaStart": MSGestureEvent;
+    "MSPointerCancel": MSPointerEvent;
+    "MSPointerDown": MSPointerEvent;
+    "MSPointerEnter": MSPointerEvent;
+    "MSPointerLeave": MSPointerEvent;
+    "MSPointerMove": MSPointerEvent;
+    "MSPointerOut": MSPointerEvent;
+    "MSPointerOver": MSPointerEvent;
+    "MSPointerUp": MSPointerEvent;
+    "offline": Event;
+    "online": Event;
+    "orientationchange": Event;
+    "pagehide": PageTransitionEvent;
+    "pageshow": PageTransitionEvent;
+    "pause": Event;
+    "play": Event;
+    "playing": Event;
+    "popstate": PopStateEvent;
+    "progress": ProgressEvent;
+    "ratechange": Event;
+    "readystatechange": ProgressEvent;
+    "reset": Event;
+    "resize": UIEvent;
+    "scroll": UIEvent;
+    "seeked": Event;
+    "seeking": Event;
+    "select": UIEvent;
+    "stalled": Event;
+    "storage": StorageEvent;
+    "submit": Event;
+    "suspend": Event;
+    "timeupdate": Event;
+    "touchcancel": TouchEvent;
+    "touchend": TouchEvent;
+    "touchmove": TouchEvent;
+    "touchstart": TouchEvent;
+    "unload": Event;
+    "volumechange": Event;
+    "waiting": Event;
+}
+
+interface Window extends EventTarget, WindowTimers, WindowSessionStorage, WindowLocalStorage, WindowConsole, GlobalEventHandlers, IDBEnvironment, WindowBase64, GlobalFetch {
+    readonly applicationCache: ApplicationCache;
+    readonly caches: CacheStorage;
+    readonly clientInformation: Navigator;
+    readonly closed: boolean;
+    readonly crypto: Crypto;
+    defaultStatus: string;
+    readonly devicePixelRatio: number;
+    readonly document: Document;
+    readonly doNotTrack: string;
+    event: Event | undefined;
+    readonly external: External;
+    readonly frameElement: Element;
+    readonly frames: Window;
+    readonly history: History;
+    readonly innerHeight: number;
+    readonly innerWidth: number;
+    readonly isSecureContext: boolean;
+    readonly length: number;
+    readonly location: Location;
+    readonly locationbar: BarProp;
+    readonly menubar: BarProp;
+    readonly msContentScript: ExtensionScriptApis;
+    readonly msCredentials: MSCredentials;
+    name: string;
+    readonly navigator: Navigator;
+    offscreenBuffering: string | boolean;
+    onabort: (this: Window, ev: UIEvent) => any;
+    onafterprint: (this: Window, ev: Event) => any;
+    onbeforeprint: (this: Window, ev: Event) => any;
+    onbeforeunload: (this: Window, ev: BeforeUnloadEvent) => any;
+    onblur: (this: Window, ev: FocusEvent) => any;
+    oncanplay: (this: Window, ev: Event) => any;
+    oncanplaythrough: (this: Window, ev: Event) => any;
+    onchange: (this: Window, ev: Event) => any;
+    onclick: (this: Window, ev: MouseEvent) => any;
+    oncompassneedscalibration: (this: Window, ev: Event) => any;
+    oncontextmenu: (this: Window, ev: PointerEvent) => any;
+    ondblclick: (this: Window, ev: MouseEvent) => any;
+    ondevicelight: (this: Window, ev: DeviceLightEvent) => any;
+    ondevicemotion: (this: Window, ev: DeviceMotionEvent) => any;
+    ondeviceorientation: (this: Window, ev: DeviceOrientationEvent) => any;
+    ondrag: (this: Window, ev: DragEvent) => any;
+    ondragend: (this: Window, ev: DragEvent) => any;
+    ondragenter: (this: Window, ev: DragEvent) => any;
+    ondragleave: (this: Window, ev: DragEvent) => any;
+    ondragover: (this: Window, ev: DragEvent) => any;
+    ondragstart: (this: Window, ev: DragEvent) => any;
+    ondrop: (this: Window, ev: DragEvent) => any;
+    ondurationchange: (this: Window, ev: Event) => any;
+    onemptied: (this: Window, ev: Event) => any;
+    onended: (this: Window, ev: MediaStreamErrorEvent) => any;
+    onerror: ErrorEventHandler;
+    onfocus: (this: Window, ev: FocusEvent) => any;
+    onhashchange: (this: Window, ev: HashChangeEvent) => any;
+    oninput: (this: Window, ev: Event) => any;
+    oninvalid: (this: Window, ev: Event) => any;
+    onkeydown: (this: Window, ev: KeyboardEvent) => any;
+    onkeypress: (this: Window, ev: KeyboardEvent) => any;
+    onkeyup: (this: Window, ev: KeyboardEvent) => any;
+    onload: (this: Window, ev: Event) => any;
+    onloadeddata: (this: Window, ev: Event) => any;
+    onloadedmetadata: (this: Window, ev: Event) => any;
+    onloadstart: (this: Window, ev: Event) => any;
+    onmessage: (this: Window, ev: MessageEvent) => any;
+    onmousedown: (this: Window, ev: MouseEvent) => any;
+    onmouseenter: (this: Window, ev: MouseEvent) => any;
+    onmouseleave: (this: Window, ev: MouseEvent) => any;
+    onmousemove: (this: Window, ev: MouseEvent) => any;
+    onmouseout: (this: Window, ev: MouseEvent) => any;
+    onmouseover: (this: Window, ev: MouseEvent) => any;
+    onmouseup: (this: Window, ev: MouseEvent) => any;
+    onmousewheel: (this: Window, ev: WheelEvent) => any;
+    onmsgesturechange: (this: Window, ev: MSGestureEvent) => any;
+    onmsgesturedoubletap: (this: Window, ev: MSGestureEvent) => any;
+    onmsgestureend: (this: Window, ev: MSGestureEvent) => any;
+    onmsgesturehold: (this: Window, ev: MSGestureEvent) => any;
+    onmsgesturestart: (this: Window, ev: MSGestureEvent) => any;
+    onmsgesturetap: (this: Window, ev: MSGestureEvent) => any;
+    onmsinertiastart: (this: Window, ev: MSGestureEvent) => any;
+    onmspointercancel: (this: Window, ev: MSPointerEvent) => any;
+    onmspointerdown: (this: Window, ev: MSPointerEvent) => any;
+    onmspointerenter: (this: Window, ev: MSPointerEvent) => any;
+    onmspointerleave: (this: Window, ev: MSPointerEvent) => any;
+    onmspointermove: (this: Window, ev: MSPointerEvent) => any;
+    onmspointerout: (this: Window, ev: MSPointerEvent) => any;
+    onmspointerover: (this: Window, ev: MSPointerEvent) => any;
+    onmspointerup: (this: Window, ev: MSPointerEvent) => any;
+    onoffline: (this: Window, ev: Event) => any;
+    ononline: (this: Window, ev: Event) => any;
+    onorientationchange: (this: Window, ev: Event) => any;
+    onpagehide: (this: Window, ev: PageTransitionEvent) => any;
+    onpageshow: (this: Window, ev: PageTransitionEvent) => any;
+    onpause: (this: Window, ev: Event) => any;
+    onplay: (this: Window, ev: Event) => any;
+    onplaying: (this: Window, ev: Event) => any;
+    onpopstate: (this: Window, ev: PopStateEvent) => any;
+    onprogress: (this: Window, ev: ProgressEvent) => any;
+    onratechange: (this: Window, ev: Event) => any;
+    onreadystatechange: (this: Window, ev: ProgressEvent) => any;
+    onreset: (this: Window, ev: Event) => any;
+    onresize: (this: Window, ev: UIEvent) => any;
+    onscroll: (this: Window, ev: UIEvent) => any;
+    onseeked: (this: Window, ev: Event) => any;
+    onseeking: (this: Window, ev: Event) => any;
+    onselect: (this: Window, ev: UIEvent) => any;
+    onstalled: (this: Window, ev: Event) => any;
+    onstorage: (this: Window, ev: StorageEvent) => any;
+    onsubmit: (this: Window, ev: Event) => any;
+    onsuspend: (this: Window, ev: Event) => any;
+    ontimeupdate: (this: Window, ev: Event) => any;
+    ontouchcancel: (ev: TouchEvent) => any;
+    ontouchend: (ev: TouchEvent) => any;
+    ontouchmove: (ev: TouchEvent) => any;
+    ontouchstart: (ev: TouchEvent) => any;
+    onunload: (this: Window, ev: Event) => any;
+    onvolumechange: (this: Window, ev: Event) => any;
+    onwaiting: (this: Window, ev: Event) => any;
+    opener: any;
+    orientation: string | number;
+    readonly outerHeight: number;
+    readonly outerWidth: number;
+    readonly pageXOffset: number;
+    readonly pageYOffset: number;
+    readonly parent: Window;
+    readonly performance: Performance;
+    readonly personalbar: BarProp;
+    readonly screen: Screen;
+    readonly screenLeft: number;
+    readonly screenTop: number;
+    readonly screenX: number;
+    readonly screenY: number;
+    readonly scrollbars: BarProp;
+    readonly scrollX: number;
+    readonly scrollY: number;
+    readonly self: Window;
+    readonly speechSynthesis: SpeechSynthesis;
+    status: string;
+    readonly statusbar: BarProp;
+    readonly styleMedia: StyleMedia;
+    readonly toolbar: BarProp;
+    readonly top: Window;
+    readonly window: Window;
+    URL: typeof URL;
+    URLSearchParams: typeof URLSearchParams;
+    Blob: typeof Blob;
+    customElements: CustomElementRegistry;
+    alert(message?: any): void;
+    blur(): void;
+    cancelAnimationFrame(handle: number): void;
+    captureEvents(): void;
+    close(): void;
+    confirm(message?: string): boolean;
+    departFocus(navigationReason: NavigationReason, origin: FocusNavigationOrigin): void;
+    focus(): void;
+    getComputedStyle(elt: Element, pseudoElt?: string): CSSStyleDeclaration;
+    getMatchedCSSRules(elt: Element, pseudoElt?: string): CSSRuleList;
+    getSelection(): Selection;
+    matchMedia(mediaQuery: string): MediaQueryList;
+    moveBy(x?: number, y?: number): void;
+    moveTo(x?: number, y?: number): void;
+    msWriteProfilerMark(profilerMarkName: string): void;
+    open(url?: string, target?: string, features?: string, replace?: boolean): Window;
+    postMessage(message: any, targetOrigin: string, transfer?: any[]): void;
+    print(): void;
+    prompt(message?: string, _default?: string): string | null;
+    releaseEvents(): void;
+    requestAnimationFrame(callback: FrameRequestCallback): number;
+    resizeBy(x?: number, y?: number): void;
+    resizeTo(x?: number, y?: number): void;
+    scroll(x?: number, y?: number): void;
+    scrollBy(x?: number, y?: number): void;
+    scrollTo(x?: number, y?: number): void;
+    stop(): void;
+    webkitCancelAnimationFrame(handle: number): void;
+    webkitConvertPointFromNodeToPage(node: Node, pt: WebKitPoint): WebKitPoint;
+    webkitConvertPointFromPageToNode(node: Node, pt: WebKitPoint): WebKitPoint;
+    webkitRequestAnimationFrame(callback: FrameRequestCallback): number;
+    createImageBitmap(image: HTMLImageElement | SVGImageElement | HTMLVideoElement | HTMLCanvasElement | ImageBitmap | ImageData | Blob, options?: ImageBitmapOptions): Promise<ImageBitmap>;
+    createImageBitmap(image: HTMLImageElement | SVGImageElement | HTMLVideoElement | HTMLCanvasElement | ImageBitmap | ImageData | Blob, sx: number, sy: number, sw: number, sh: number, options?: ImageBitmapOptions): Promise<ImageBitmap>;
+    scroll(options?: ScrollToOptions): void;
+    scrollTo(options?: ScrollToOptions): void;
+    scrollBy(options?: ScrollToOptions): void;
+    addEventListener<K extends keyof WindowEventMap>(type: K, listener: (this: Window, ev: WindowEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var Window: {
+    prototype: Window;
+    new(): Window;
+};
+
+interface WorkerEventMap extends AbstractWorkerEventMap {
+    "message": MessageEvent;
+}
+
+interface Worker extends EventTarget, AbstractWorker {
+    onmessage: (this: Worker, ev: MessageEvent) => any;
+    postMessage(message: any, transfer?: any[]): void;
+    terminate(): void;
+    addEventListener<K extends keyof WorkerEventMap>(type: K, listener: (this: Worker, ev: WorkerEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var Worker: {
+    prototype: Worker;
+    new(stringUrl: string): Worker;
+};
+
+interface XMLDocument extends Document {
+    addEventListener<K extends keyof DocumentEventMap>(type: K, listener: (this: XMLDocument, ev: DocumentEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var XMLDocument: {
+    prototype: XMLDocument;
+    new(): XMLDocument;
+};
+
+interface XMLHttpRequestEventMap extends XMLHttpRequestEventTargetEventMap {
+    "readystatechange": Event;
+}
+
+interface XMLHttpRequest extends EventTarget, XMLHttpRequestEventTarget {
+    onreadystatechange: (this: XMLHttpRequest, ev: Event) => any;
+    readonly readyState: number;
+    readonly response: any;
+    readonly responseText: string;
+    responseType: XMLHttpRequestResponseType;
+    readonly responseURL: string;
+    readonly responseXML: Document | null;
+    readonly status: number;
+    readonly statusText: string;
+    timeout: number;
+    readonly upload: XMLHttpRequestUpload;
+    withCredentials: boolean;
+    msCaching?: string;
+    abort(): void;
+    getAllResponseHeaders(): string;
+    getResponseHeader(header: string): string | null;
+    msCachingEnabled(): boolean;
+    open(method: string, url: string, async?: boolean, user?: string, password?: string): void;
+    overrideMimeType(mime: string): void;
+    send(data?: Document): void;
+    send(data?: string): void;
+    send(data?: any): void;
+    setRequestHeader(header: string, value: string): void;
+    readonly DONE: number;
+    readonly HEADERS_RECEIVED: number;
+    readonly LOADING: number;
+    readonly OPENED: number;
+    readonly UNSENT: number;
+    addEventListener<K extends keyof XMLHttpRequestEventMap>(type: K, listener: (this: XMLHttpRequest, ev: XMLHttpRequestEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var XMLHttpRequest: {
+    prototype: XMLHttpRequest;
+    new(): XMLHttpRequest;
+    readonly DONE: number;
+    readonly HEADERS_RECEIVED: number;
+    readonly LOADING: number;
+    readonly OPENED: number;
+    readonly UNSENT: number;
+};
+
+interface XMLHttpRequestUpload extends EventTarget, XMLHttpRequestEventTarget {
+    addEventListener<K extends keyof XMLHttpRequestEventTargetEventMap>(type: K, listener: (this: XMLHttpRequestUpload, ev: XMLHttpRequestEventTargetEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var XMLHttpRequestUpload: {
+    prototype: XMLHttpRequestUpload;
+    new(): XMLHttpRequestUpload;
+};
+
+interface XMLSerializer {
+    serializeToString(target: Node): string;
+}
+
+declare var XMLSerializer: {
+    prototype: XMLSerializer;
+    new(): XMLSerializer;
+};
+
+interface XPathEvaluator {
+    createExpression(expression: string, resolver: XPathNSResolver): XPathExpression;
+    createNSResolver(nodeResolver?: Node): XPathNSResolver;
+    evaluate(expression: string, contextNode: Node, resolver: XPathNSResolver | null, type: number, result: XPathResult | null): XPathResult;
+}
+
+declare var XPathEvaluator: {
+    prototype: XPathEvaluator;
+    new(): XPathEvaluator;
+};
+
+interface XPathExpression {
+    evaluate(contextNode: Node, type: number, result: XPathResult | null): XPathResult;
+}
+
+declare var XPathExpression: {
+    prototype: XPathExpression;
+    new(): XPathExpression;
+};
+
+interface XPathNSResolver {
+    lookupNamespaceURI(prefix: string): string;
+}
+
+declare var XPathNSResolver: {
+    prototype: XPathNSResolver;
+    new(): XPathNSResolver;
+};
+
+interface XPathResult {
+    readonly booleanValue: boolean;
+    readonly invalidIteratorState: boolean;
+    readonly numberValue: number;
+    readonly resultType: number;
+    readonly singleNodeValue: Node;
+    readonly snapshotLength: number;
+    readonly stringValue: string;
+    iterateNext(): Node;
+    snapshotItem(index: number): Node;
+    readonly ANY_TYPE: number;
+    readonly ANY_UNORDERED_NODE_TYPE: number;
+    readonly BOOLEAN_TYPE: number;
+    readonly FIRST_ORDERED_NODE_TYPE: number;
+    readonly NUMBER_TYPE: number;
+    readonly ORDERED_NODE_ITERATOR_TYPE: number;
+    readonly ORDERED_NODE_SNAPSHOT_TYPE: number;
+    readonly STRING_TYPE: number;
+    readonly UNORDERED_NODE_ITERATOR_TYPE: number;
+    readonly UNORDERED_NODE_SNAPSHOT_TYPE: number;
+}
+
+declare var XPathResult: {
+    prototype: XPathResult;
+    new(): XPathResult;
+    readonly ANY_TYPE: number;
+    readonly ANY_UNORDERED_NODE_TYPE: number;
+    readonly BOOLEAN_TYPE: number;
+    readonly FIRST_ORDERED_NODE_TYPE: number;
+    readonly NUMBER_TYPE: number;
+    readonly ORDERED_NODE_ITERATOR_TYPE: number;
+    readonly ORDERED_NODE_SNAPSHOT_TYPE: number;
+    readonly STRING_TYPE: number;
+    readonly UNORDERED_NODE_ITERATOR_TYPE: number;
+    readonly UNORDERED_NODE_SNAPSHOT_TYPE: number;
+};
+
+interface XSLTProcessor {
+    clearParameters(): void;
+    getParameter(namespaceURI: string, localName: string): any;
+    importStylesheet(style: Node): void;
+    removeParameter(namespaceURI: string, localName: string): void;
+    reset(): void;
+    setParameter(namespaceURI: string, localName: string, value: any): void;
+    transformToDocument(source: Node): Document;
+    transformToFragment(source: Node, document: Document): DocumentFragment;
+}
+
+declare var XSLTProcessor: {
+    prototype: XSLTProcessor;
+    new(): XSLTProcessor;
+};
+
+interface AbstractWorkerEventMap {
+    "error": ErrorEvent;
+}
+
+interface AbstractWorker {
+    onerror: (this: AbstractWorker, ev: ErrorEvent) => any;
+    addEventListener<K extends keyof AbstractWorkerEventMap>(type: K, listener: (this: AbstractWorker, ev: AbstractWorkerEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+interface Body {
+    readonly bodyUsed: boolean;
+    arrayBuffer(): Promise<ArrayBuffer>;
+    blob(): Promise<Blob>;
+    json(): Promise<any>;
+    text(): Promise<string>;
+    formData(): Promise<FormData>;
+}
+
+interface CanvasPathMethods {
+    arc(x: number, y: number, radius: number, startAngle: number, endAngle: number, anticlockwise?: boolean): void;
+    arcTo(x1: number, y1: number, x2: number, y2: number, radius: number): void;
+    bezierCurveTo(cp1x: number, cp1y: number, cp2x: number, cp2y: number, x: number, y: number): void;
+    closePath(): void;
+    ellipse(x: number, y: number, radiusX: number, radiusY: number, rotation: number, startAngle: number, endAngle: number, anticlockwise?: boolean): void;
+    lineTo(x: number, y: number): void;
+    moveTo(x: number, y: number): void;
+    quadraticCurveTo(cpx: number, cpy: number, x: number, y: number): void;
+    rect(x: number, y: number, w: number, h: number): void;
+}
+
+interface ChildNode {
+    remove(): void;
+}
+
+interface DocumentEvent {
+    createEvent(eventInterface: "AnimationEvent"): AnimationEvent;
+    createEvent(eventInterface: "AudioProcessingEvent"): AudioProcessingEvent;
+    createEvent(eventInterface: "BeforeUnloadEvent"): BeforeUnloadEvent;
+    createEvent(eventInterface: "ClipboardEvent"): ClipboardEvent;
+    createEvent(eventInterface: "CloseEvent"): CloseEvent;
+    createEvent(eventInterface: "CompositionEvent"): CompositionEvent;
+    createEvent(eventInterface: "CustomEvent"): CustomEvent;
+    createEvent(eventInterface: "DeviceLightEvent"): DeviceLightEvent;
+    createEvent(eventInterface: "DeviceMotionEvent"): DeviceMotionEvent;
+    createEvent(eventInterface: "DeviceOrientationEvent"): DeviceOrientationEvent;
+    createEvent(eventInterface: "DragEvent"): DragEvent;
+    createEvent(eventInterface: "ErrorEvent"): ErrorEvent;
+    createEvent(eventInterface: "Event"): Event;
+    createEvent(eventInterface: "Events"): Event;
+    createEvent(eventInterface: "FocusEvent"): FocusEvent;
+    createEvent(eventInterface: "FocusNavigationEvent"): FocusNavigationEvent;
+    createEvent(eventInterface: "GamepadEvent"): GamepadEvent;
+    createEvent(eventInterface: "HashChangeEvent"): HashChangeEvent;
+    createEvent(eventInterface: "IDBVersionChangeEvent"): IDBVersionChangeEvent;
+    createEvent(eventInterface: "KeyboardEvent"): KeyboardEvent;
+    createEvent(eventInterface: "ListeningStateChangedEvent"): ListeningStateChangedEvent;
+    createEvent(eventInterface: "LongRunningScriptDetectedEvent"): LongRunningScriptDetectedEvent;
+    createEvent(eventInterface: "MSGestureEvent"): MSGestureEvent;
+    createEvent(eventInterface: "MSManipulationEvent"): MSManipulationEvent;
+    createEvent(eventInterface: "MSMediaKeyMessageEvent"): MSMediaKeyMessageEvent;
+    createEvent(eventInterface: "MSMediaKeyNeededEvent"): MSMediaKeyNeededEvent;
+    createEvent(eventInterface: "MSPointerEvent"): MSPointerEvent;
+    createEvent(eventInterface: "MSSiteModeEvent"): MSSiteModeEvent;
+    createEvent(eventInterface: "MediaEncryptedEvent"): MediaEncryptedEvent;
+    createEvent(eventInterface: "MediaKeyMessageEvent"): MediaKeyMessageEvent;
+    createEvent(eventInterface: "MediaStreamErrorEvent"): MediaStreamErrorEvent;
+    createEvent(eventInterface: "MediaStreamEvent"): MediaStreamEvent;
+    createEvent(eventInterface: "MediaStreamTrackEvent"): MediaStreamTrackEvent;
+    createEvent(eventInterface: "MessageEvent"): MessageEvent;
+    createEvent(eventInterface: "MouseEvent"): MouseEvent;
+    createEvent(eventInterface: "MouseEvents"): MouseEvent;
+    createEvent(eventInterface: "MutationEvent"): MutationEvent;
+    createEvent(eventInterface: "MutationEvents"): MutationEvent;
+    createEvent(eventInterface: "NavigationCompletedEvent"): NavigationCompletedEvent;
+    createEvent(eventInterface: "NavigationEvent"): NavigationEvent;
+    createEvent(eventInterface: "NavigationEventWithReferrer"): NavigationEventWithReferrer;
+    createEvent(eventInterface: "OfflineAudioCompletionEvent"): OfflineAudioCompletionEvent;
+    createEvent(eventInterface: "OverflowEvent"): OverflowEvent;
+    createEvent(eventInterface: "PageTransitionEvent"): PageTransitionEvent;
+    createEvent(eventInterface: "PaymentRequestUpdateEvent"): PaymentRequestUpdateEvent;
+    createEvent(eventInterface: "PermissionRequestedEvent"): PermissionRequestedEvent;
+    createEvent(eventInterface: "PointerEvent"): PointerEvent;
+    createEvent(eventInterface: "PopStateEvent"): PopStateEvent;
+    createEvent(eventInterface: "ProgressEvent"): ProgressEvent;
+    createEvent(eventInterface: "RTCDTMFToneChangeEvent"): RTCDTMFToneChangeEvent;
+    createEvent(eventInterface: "RTCDtlsTransportStateChangedEvent"): RTCDtlsTransportStateChangedEvent;
+    createEvent(eventInterface: "RTCIceCandidatePairChangedEvent"): RTCIceCandidatePairChangedEvent;
+    createEvent(eventInterface: "RTCIceGathererEvent"): RTCIceGathererEvent;
+    createEvent(eventInterface: "RTCIceTransportStateChangedEvent"): RTCIceTransportStateChangedEvent;
+    createEvent(eventInterface: "RTCPeerConnectionIceEvent"): RTCPeerConnectionIceEvent;
+    createEvent(eventInterface: "RTCSsrcConflictEvent"): RTCSsrcConflictEvent;
+    createEvent(eventInterface: "SVGZoomEvent"): SVGZoomEvent;
+    createEvent(eventInterface: "SVGZoomEvents"): SVGZoomEvent;
+    createEvent(eventInterface: "ScriptNotifyEvent"): ScriptNotifyEvent;
+    createEvent(eventInterface: "ServiceWorkerMessageEvent"): ServiceWorkerMessageEvent;
+    createEvent(eventInterface: "SpeechSynthesisEvent"): SpeechSynthesisEvent;
+    createEvent(eventInterface: "StorageEvent"): StorageEvent;
+    createEvent(eventInterface: "TextEvent"): TextEvent;
+    createEvent(eventInterface: "TouchEvent"): TouchEvent;
+    createEvent(eventInterface: "TrackEvent"): TrackEvent;
+    createEvent(eventInterface: "TransitionEvent"): TransitionEvent;
+    createEvent(eventInterface: "UIEvent"): UIEvent;
+    createEvent(eventInterface: "UIEvents"): UIEvent;
+    createEvent(eventInterface: "UnviewableContentIdentifiedEvent"): UnviewableContentIdentifiedEvent;
+    createEvent(eventInterface: "WebGLContextEvent"): WebGLContextEvent;
+    createEvent(eventInterface: "WheelEvent"): WheelEvent;
+    createEvent(eventInterface: string): Event;
+}
+
+interface DOML2DeprecatedColorProperty {
+    color: string;
+}
+
+interface DOML2DeprecatedSizeProperty {
+    size: number;
+}
+
+interface ElementTraversal {
+    readonly childElementCount: number;
+    readonly firstElementChild: Element | null;
+    readonly lastElementChild: Element | null;
+    readonly nextElementSibling: Element | null;
+    readonly previousElementSibling: Element | null;
+}
+
+interface GetSVGDocument {
+    getSVGDocument(): Document;
+}
+
+interface GlobalEventHandlersEventMap {
+    "pointercancel": PointerEvent;
+    "pointerdown": PointerEvent;
+    "pointerenter": PointerEvent;
+    "pointerleave": PointerEvent;
+    "pointermove": PointerEvent;
+    "pointerout": PointerEvent;
+    "pointerover": PointerEvent;
+    "pointerup": PointerEvent;
+    "wheel": WheelEvent;
+}
+
+interface GlobalEventHandlers {
+    onpointercancel: (this: GlobalEventHandlers, ev: PointerEvent) => any;
+    onpointerdown: (this: GlobalEventHandlers, ev: PointerEvent) => any;
+    onpointerenter: (this: GlobalEventHandlers, ev: PointerEvent) => any;
+    onpointerleave: (this: GlobalEventHandlers, ev: PointerEvent) => any;
+    onpointermove: (this: GlobalEventHandlers, ev: PointerEvent) => any;
+    onpointerout: (this: GlobalEventHandlers, ev: PointerEvent) => any;
+    onpointerover: (this: GlobalEventHandlers, ev: PointerEvent) => any;
+    onpointerup: (this: GlobalEventHandlers, ev: PointerEvent) => any;
+    onwheel: (this: GlobalEventHandlers, ev: WheelEvent) => any;
+    addEventListener<K extends keyof GlobalEventHandlersEventMap>(type: K, listener: (this: GlobalEventHandlers, ev: GlobalEventHandlersEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+interface GlobalFetch {
+    fetch(input: RequestInfo, init?: RequestInit): Promise<Response>;
+}
+
+interface HTMLTableAlignment {
+    /**
+     * Sets or retrieves a value that you can use to implement your own ch functionality for the object.
+     */
+    ch: string;
+    /**
+     * Sets or retrieves a value that you can use to implement your own chOff functionality for the object.
+     */
+    chOff: string;
+    /**
+     * Sets or retrieves how text and other content are vertically aligned within the object that contains them.
+     */
+    vAlign: string;
+}
+
+interface IDBEnvironment {
+    readonly indexedDB: IDBFactory;
+}
+
+interface LinkStyle {
+    readonly sheet: StyleSheet;
+}
+
+interface MSBaseReaderEventMap {
+    "abort": Event;
+    "error": ErrorEvent;
+    "load": Event;
+    "loadend": ProgressEvent;
+    "loadstart": Event;
+    "progress": ProgressEvent;
+}
+
+interface MSBaseReader {
+    onabort: (this: MSBaseReader, ev: Event) => any;
+    onerror: (this: MSBaseReader, ev: ErrorEvent) => any;
+    onload: (this: MSBaseReader, ev: Event) => any;
+    onloadend: (this: MSBaseReader, ev: ProgressEvent) => any;
+    onloadstart: (this: MSBaseReader, ev: Event) => any;
+    onprogress: (this: MSBaseReader, ev: ProgressEvent) => any;
+    readonly readyState: number;
+    readonly result: any;
+    abort(): void;
+    readonly DONE: number;
+    readonly EMPTY: number;
+    readonly LOADING: number;
+    addEventListener<K extends keyof MSBaseReaderEventMap>(type: K, listener: (this: MSBaseReader, ev: MSBaseReaderEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+interface MSFileSaver {
+    msSaveBlob(blob: any, defaultName?: string): boolean;
+    msSaveOrOpenBlob(blob: any, defaultName?: string): boolean;
+}
+
+interface MSNavigatorDoNotTrack {
+    confirmSiteSpecificTrackingException(args: ConfirmSiteSpecificExceptionsInformation): boolean;
+    confirmWebWideTrackingException(args: ExceptionInformation): boolean;
+    removeSiteSpecificTrackingException(args: ExceptionInformation): void;
+    removeWebWideTrackingException(args: ExceptionInformation): void;
+    storeSiteSpecificTrackingException(args: StoreSiteSpecificExceptionsInformation): void;
+    storeWebWideTrackingException(args: StoreExceptionsInformation): void;
+}
+
+interface NavigatorBeacon {
+    sendBeacon(url: USVString, data?: BodyInit): boolean;
+}
+
+interface NavigatorConcurrentHardware {
+    readonly hardwareConcurrency: number;
+}
+
+interface NavigatorContentUtils {
+}
+
+interface NavigatorGeolocation {
+    readonly geolocation: Geolocation;
+}
+
+interface NavigatorID {
+    readonly appCodeName: string;
+    readonly appName: string;
+    readonly appVersion: string;
+    readonly platform: string;
+    readonly product: string;
+    readonly productSub: string;
+    readonly userAgent: string;
+    readonly vendor: string;
+    readonly vendorSub: string;
+}
+
+interface NavigatorOnLine {
+    readonly onLine: boolean;
+}
+
+interface NavigatorStorageUtils {
+}
+
+interface NavigatorUserMedia {
+    readonly mediaDevices: MediaDevices;
+    getUserMedia(constraints: MediaStreamConstraints, successCallback: NavigatorUserMediaSuccessCallback, errorCallback: NavigatorUserMediaErrorCallback): void;
+}
+
+interface NodeSelector {
+    querySelector<K extends keyof ElementTagNameMap>(selectors: K): ElementTagNameMap[K] | null;
+    querySelector(selectors: string): Element | null;
+    querySelectorAll<K extends keyof ElementListTagNameMap>(selectors: K): ElementListTagNameMap[K];
+    querySelectorAll(selectors: string): NodeListOf<Element>;
+}
+
+interface RandomSource {
+    getRandomValues(array: ArrayBufferView): ArrayBufferView;
+}
+
+interface SVGAnimatedPoints {
+    readonly animatedPoints: SVGPointList;
+    readonly points: SVGPointList;
+}
+
+interface SVGFilterPrimitiveStandardAttributes {
+    readonly height: SVGAnimatedLength;
+    readonly result: SVGAnimatedString;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+}
+
+interface SVGFitToViewBox {
+    readonly preserveAspectRatio: SVGAnimatedPreserveAspectRatio;
+    readonly viewBox: SVGAnimatedRect;
+}
+
+interface SVGTests {
+    readonly requiredExtensions: SVGStringList;
+    readonly requiredFeatures: SVGStringList;
+    readonly systemLanguage: SVGStringList;
+    hasExtension(extension: string): boolean;
+}
+
+interface SVGURIReference {
+    readonly href: SVGAnimatedString;
+}
+
+interface WindowBase64 {
+    atob(encodedString: string): string;
+    btoa(rawString: string): string;
+}
+
+interface WindowConsole {
+    readonly console: Console;
+}
+
+interface WindowLocalStorage {
+    readonly localStorage: Storage;
+}
+
+interface WindowSessionStorage {
+    readonly sessionStorage: Storage;
+}
+
+interface WindowTimers extends Object, WindowTimersExtension {
+    clearInterval(handle: number): void;
+    clearTimeout(handle: number): void;
+    setInterval(handler: (...args: any[]) => void, timeout: number): number;
+    setInterval(handler: any, timeout?: any, ...args: any[]): number;
+    setTimeout(handler: (...args: any[]) => void, timeout: number): number;
+    setTimeout(handler: any, timeout?: any, ...args: any[]): number;
+}
+
+interface WindowTimersExtension {
+    clearImmediate(handle: number): void;
+    setImmediate(handler: (...args: any[]) => void): number;
+    setImmediate(handler: any, ...args: any[]): number;
+}
+
+interface XMLHttpRequestEventTargetEventMap {
+    "abort": Event;
+    "error": ErrorEvent;
+    "load": Event;
+    "loadend": ProgressEvent;
+    "loadstart": Event;
+    "progress": ProgressEvent;
+    "timeout": ProgressEvent;
+}
+
+interface XMLHttpRequestEventTarget {
+    onabort: (this: XMLHttpRequestEventTarget, ev: Event) => any;
+    onerror: (this: XMLHttpRequestEventTarget, ev: ErrorEvent) => any;
+    onload: (this: XMLHttpRequestEventTarget, ev: Event) => any;
+    onloadend: (this: XMLHttpRequestEventTarget, ev: ProgressEvent) => any;
+    onloadstart: (this: XMLHttpRequestEventTarget, ev: Event) => any;
+    onprogress: (this: XMLHttpRequestEventTarget, ev: ProgressEvent) => any;
+    ontimeout: (this: XMLHttpRequestEventTarget, ev: ProgressEvent) => any;
+    addEventListener<K extends keyof XMLHttpRequestEventTargetEventMap>(type: K, listener: (this: XMLHttpRequestEventTarget, ev: XMLHttpRequestEventTargetEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+interface ErrorEventInit {
+    message?: string;
+    filename?: string;
+    lineno?: number;
+    conlno?: number;
+    error?: any;
+}
+
+interface StorageEventInit extends EventInit {
+    key?: string;
+    oldValue?: string;
+    newValue?: string;
+    url: string;
+    storageArea?: Storage;
+}
+
+interface Canvas2DContextAttributes {
+    alpha?: boolean;
+    willReadFrequently?: boolean;
+    storage?: boolean;
+    [attribute: string]: boolean | string | undefined;
+}
+
+interface ImageBitmapOptions {
+    imageOrientation?: "none" | "flipY";
+    premultiplyAlpha?: "none" | "premultiply" | "default";
+    colorSpaceConversion?: "none" | "default";
+    resizeWidth?: number;
+    resizeHeight?: number;
+    resizeQuality?: "pixelated" | "low" | "medium" | "high";
+}
+
+interface ImageBitmap {
+    readonly width: number;
+    readonly height: number;
+    close(): void;
+}
+
+interface URLSearchParams {
+    /**
+     * Appends a specified key/value pair as a new search parameter.
+     */
+    append(name: string, value: string): void;
+    /**
+     * Deletes the given search parameter, and its associated value, from the list of all search parameters.
+     */
+    delete(name: string): void;
+    /**
+     * Returns the first value associated to the given search parameter.
+     */
+    get(name: string): string | null;
+    /**
+     * Returns all the values association with a given search parameter.
+     */
+    getAll(name: string): string[];
+    /**
+     * Returns a Boolean indicating if such a search parameter exists.
+     */
+    has(name: string): boolean;
+    /**
+     * Sets the value associated to a given search parameter to the given value. If there were several values, delete the others.
+     */
+    set(name: string, value: string): void;
+}
+
+declare var URLSearchParams: {
+    prototype: URLSearchParams;
+    /**
+     * Constructor returning a URLSearchParams object.
+     */
+    new (init?: string | URLSearchParams): URLSearchParams;
+};
+
+interface NodeListOf<TNode extends Node> extends NodeList {
+    length: number;
+    item(index: number): TNode;
+    [index: number]: TNode;
+}
+
+interface HTMLCollectionOf<T extends Element> extends HTMLCollection {
+    item(index: number): T;
+    namedItem(name: string): T;
+    [index: number]: T;
+}
+
+interface BlobPropertyBag {
+    type?: string;
+    endings?: string;
+}
+
+interface FilePropertyBag {
+    type?: string;
+    lastModified?: number;
+}
+
+interface EventListenerObject {
+    handleEvent(evt: Event): void;
+}
+
+interface ProgressEventInit extends EventInit {
+    lengthComputable?: boolean;
+    loaded?: number;
+    total?: number;
+}
+
+interface ScrollOptions {
+    behavior?: ScrollBehavior;
+}
+
+interface ScrollToOptions extends ScrollOptions {
+    left?: number;
+    top?: number;
+}
+
+interface ScrollIntoViewOptions extends ScrollOptions {
+    block?: ScrollLogicalPosition;
+    inline?: ScrollLogicalPosition;
+}
+
+interface ClipboardEventInit extends EventInit {
+    data?: string;
+    dataType?: string;
+}
+
+interface IDBArrayKey extends Array<IDBValidKey> {
+}
+
+interface RsaKeyGenParams extends Algorithm {
+    modulusLength: number;
+    publicExponent: Uint8Array;
+}
+
+interface RsaHashedKeyGenParams extends RsaKeyGenParams {
+    hash: AlgorithmIdentifier;
+}
+
+interface RsaKeyAlgorithm extends KeyAlgorithm {
+    modulusLength: number;
+    publicExponent: Uint8Array;
+}
+
+interface RsaHashedKeyAlgorithm extends RsaKeyAlgorithm {
+    hash: AlgorithmIdentifier;
+}
+
+interface RsaHashedImportParams {
+    hash: AlgorithmIdentifier;
+}
+
+interface RsaPssParams {
+    saltLength: number;
+}
+
+interface RsaOaepParams extends Algorithm {
+    label?: BufferSource;
+}
+
+interface EcdsaParams extends Algorithm {
+    hash: AlgorithmIdentifier;
+}
+
+interface EcKeyGenParams extends Algorithm {
+    namedCurve: string;
+}
+
+interface EcKeyAlgorithm extends KeyAlgorithm {
+    typedCurve: string;
+}
+
+interface EcKeyImportParams {
+    namedCurve: string;
+}
+
+interface EcdhKeyDeriveParams extends Algorithm {
+    public: CryptoKey;
+}
+
+interface AesCtrParams extends Algorithm {
+    counter: BufferSource;
+    length: number;
+}
+
+interface AesKeyAlgorithm extends KeyAlgorithm {
+    length: number;
+}
+
+interface AesKeyGenParams extends Algorithm {
+    length: number;
+}
+
+interface AesDerivedKeyParams extends Algorithm {
+    length: number;
+}
+
+interface AesCbcParams extends Algorithm {
+    iv: BufferSource;
+}
+
+interface AesCmacParams extends Algorithm {
+    length: number;
+}
+
+interface AesGcmParams extends Algorithm {
+    iv: BufferSource;
+    additionalData?: BufferSource;
+    tagLength?: number;
+}
+
+interface AesCfbParams extends Algorithm {
+    iv: BufferSource;
+}
+
+interface HmacImportParams extends Algorithm {
+    hash?: AlgorithmIdentifier;
+    length?: number;
+}
+
+interface HmacKeyAlgorithm extends KeyAlgorithm {
+    hash: AlgorithmIdentifier;
+    length: number;
+}
+
+interface HmacKeyGenParams extends Algorithm {
+    hash: AlgorithmIdentifier;
+    length?: number;
+}
+
+interface DhKeyGenParams extends Algorithm {
+    prime: Uint8Array;
+    generator: Uint8Array;
+}
+
+interface DhKeyAlgorithm extends KeyAlgorithm {
+    prime: Uint8Array;
+    generator: Uint8Array;
+}
+
+interface DhKeyDeriveParams extends Algorithm {
+    public: CryptoKey;
+}
+
+interface DhImportKeyParams extends Algorithm {
+    prime: Uint8Array;
+    generator: Uint8Array;
+}
+
+interface ConcatParams extends Algorithm {
+    hash?: AlgorithmIdentifier;
+    algorithmId: Uint8Array;
+    partyUInfo: Uint8Array;
+    partyVInfo: Uint8Array;
+    publicInfo?: Uint8Array;
+    privateInfo?: Uint8Array;
+}
+
+interface HkdfCtrParams extends Algorithm {
+    hash: AlgorithmIdentifier;
+    label: BufferSource;
+    context: BufferSource;
+}
+
+interface Pbkdf2Params extends Algorithm {
+    salt: BufferSource;
+    iterations: number;
+    hash: AlgorithmIdentifier;
+}
+
+interface RsaOtherPrimesInfo {
+    r: string;
+    d: string;
+    t: string;
+}
+
+interface JsonWebKey {
+    kty: string;
+    use?: string;
+    key_ops?: string[];
+    alg?: string;
+    kid?: string;
+    x5u?: string;
+    x5c?: string;
+    x5t?: string;
+    ext?: boolean;
+    crv?: string;
+    x?: string;
+    y?: string;
+    d?: string;
+    n?: string;
+    e?: string;
+    p?: string;
+    q?: string;
+    dp?: string;
+    dq?: string;
+    qi?: string;
+    oth?: RsaOtherPrimesInfo[];
+    k?: string;
+}
+
+interface ParentNode {
+    readonly children: HTMLCollection;
+    readonly firstElementChild: Element | null;
+    readonly lastElementChild: Element | null;
+    readonly childElementCount: number;
+}
+
+interface DocumentOrShadowRoot {
+    readonly activeElement: Element | null;
+    readonly stylesheets: StyleSheetList;
+    getSelection(): Selection | null;
+    elementFromPoint(x: number, y: number): Element | null;
+    elementsFromPoint(x: number, y: number): Element[];
+}
+
+interface ShadowRoot extends DocumentOrShadowRoot, DocumentFragment {
+    readonly host: Element;
+    innerHTML: string;
+}
+
+interface ShadowRootInit {
+    mode: "open" | "closed";
+    delegatesFocus?: boolean;
+}
+
+interface HTMLSlotElement extends HTMLElement {
+    name: string;
+    assignedNodes(options?: AssignedNodesOptions): Node[];
+}
+
+interface AssignedNodesOptions {
+    flatten?: boolean;
+}
+
+interface ElementDefinitionOptions {
+    extends: string;
+}
+
+interface CustomElementRegistry {
+    define(name: string, constructor: Function, options?: ElementDefinitionOptions): void;
+    get(name: string): any;
+    whenDefined(name: string): PromiseLike<void>;
+}
+
+interface PromiseRejectionEvent extends Event {
+    readonly promise: PromiseLike<any>;
+    readonly reason: any;
+}
+
+interface PromiseRejectionEventInit extends EventInit {
+    promise: PromiseLike<any>;
+    reason?: any;
+}
+
+interface EventListenerOptions {
+    capture?: boolean;
+}
+
+interface AddEventListenerOptions extends EventListenerOptions {
+    passive?: boolean;
+    once?: boolean;
+}
+
+interface TouchEventInit extends EventModifierInit {
+    touches?: Touch[];
+    targetTouches?: Touch[];
+    changedTouches?: Touch[];
+}
+
+declare type EventListenerOrEventListenerObject = EventListener | EventListenerObject;
+
+interface DecodeErrorCallback {
+    (error: DOMException): void;
+}
+interface DecodeSuccessCallback {
+    (decodedData: AudioBuffer): void;
+}
+interface ErrorEventHandler {
+    (message: string, filename?: string, lineno?: number, colno?: number, error?: Error): void;
+}
+interface ForEachCallback {
+    (keyId: any, status: MediaKeyStatus): void;
+}
+interface FrameRequestCallback {
+    (time: number): void;
+}
+interface FunctionStringCallback {
+    (data: string): void;
+}
+interface IntersectionObserverCallback {
+    (entries: IntersectionObserverEntry[], observer: IntersectionObserver): void;
+}
+interface MediaQueryListListener {
+    (mql: MediaQueryList): void;
+}
+interface MSExecAtPriorityFunctionCallback {
+    (...args: any[]): any;
+}
+interface MSLaunchUriCallback {
+    (): void;
+}
+interface MSUnsafeFunctionCallback {
+    (): any;
+}
+interface MutationCallback {
+    (mutations: MutationRecord[], observer: MutationObserver): void;
+}
+interface NavigatorUserMediaErrorCallback {
+    (error: MediaStreamError): void;
+}
+interface NavigatorUserMediaSuccessCallback {
+    (stream: MediaStream): void;
+}
+interface NotificationPermissionCallback {
+    (permission: NotificationPermission): void;
+}
+interface PositionCallback {
+    (position: Position): void;
+}
+interface PositionErrorCallback {
+    (error: PositionError): void;
+}
+interface RTCPeerConnectionErrorCallback {
+    (error: DOMError): void;
+}
+interface RTCSessionDescriptionCallback {
+    (sdp: RTCSessionDescription): void;
+}
+interface RTCStatsCallback {
+    (report: RTCStatsReport): void;
+}
+interface VoidFunction {
+    (): void;
+}
+interface HTMLElementTagNameMap {
+    "a": HTMLAnchorElement;
+    "applet": HTMLAppletElement;
+    "area": HTMLAreaElement;
+    "audio": HTMLAudioElement;
+    "base": HTMLBaseElement;
+    "basefont": HTMLBaseFontElement;
+    "blockquote": HTMLQuoteElement;
+    "body": HTMLBodyElement;
+    "br": HTMLBRElement;
+    "button": HTMLButtonElement;
+    "canvas": HTMLCanvasElement;
+    "caption": HTMLTableCaptionElement;
+    "col": HTMLTableColElement;
+    "colgroup": HTMLTableColElement;
+    "data": HTMLDataElement;
+    "datalist": HTMLDataListElement;
+    "del": HTMLModElement;
+    "dir": HTMLDirectoryElement;
+    "div": HTMLDivElement;
+    "dl": HTMLDListElement;
+    "embed": HTMLEmbedElement;
+    "fieldset": HTMLFieldSetElement;
+    "font": HTMLFontElement;
+    "form": HTMLFormElement;
+    "frame": HTMLFrameElement;
+    "frameset": HTMLFrameSetElement;
+    "h1": HTMLHeadingElement;
+    "h2": HTMLHeadingElement;
+    "h3": HTMLHeadingElement;
+    "h4": HTMLHeadingElement;
+    "h5": HTMLHeadingElement;
+    "h6": HTMLHeadingElement;
+    "head": HTMLHeadElement;
+    "hr": HTMLHRElement;
+    "html": HTMLHtmlElement;
+    "iframe": HTMLIFrameElement;
+    "img": HTMLImageElement;
+    "input": HTMLInputElement;
+    "ins": HTMLModElement;
+    "isindex": HTMLUnknownElement;
+    "label": HTMLLabelElement;
+    "legend": HTMLLegendElement;
+    "li": HTMLLIElement;
+    "link": HTMLLinkElement;
+    "listing": HTMLPreElement;
+    "map": HTMLMapElement;
+    "marquee": HTMLMarqueeElement;
+    "menu": HTMLMenuElement;
+    "meta": HTMLMetaElement;
+    "meter": HTMLMeterElement;
+    "nextid": HTMLUnknownElement;
+    "object": HTMLObjectElement;
+    "ol": HTMLOListElement;
+    "optgroup": HTMLOptGroupElement;
+    "option": HTMLOptionElement;
+    "output": HTMLOutputElement;
+    "p": HTMLParagraphElement;
+    "param": HTMLParamElement;
+    "picture": HTMLPictureElement;
+    "pre": HTMLPreElement;
+    "progress": HTMLProgressElement;
+    "q": HTMLQuoteElement;
+    "script": HTMLScriptElement;
+    "select": HTMLSelectElement;
+    "source": HTMLSourceElement;
+    "span": HTMLSpanElement;
+    "style": HTMLStyleElement;
+    "table": HTMLTableElement;
+    "tbody": HTMLTableSectionElement;
+    "td": HTMLTableDataCellElement;
+    "template": HTMLTemplateElement;
+    "textarea": HTMLTextAreaElement;
+    "tfoot": HTMLTableSectionElement;
+    "th": HTMLTableHeaderCellElement;
+    "thead": HTMLTableSectionElement;
+    "time": HTMLTimeElement;
+    "title": HTMLTitleElement;
+    "tr": HTMLTableRowElement;
+    "track": HTMLTrackElement;
+    "ul": HTMLUListElement;
+    "video": HTMLVideoElement;
+    "x-ms-webview": MSHTMLWebViewElement;
+    "xmp": HTMLPreElement;
+}
+
+interface ElementTagNameMap extends HTMLElementTagNameMap {
+    "abbr": HTMLElement;
+    "acronym": HTMLElement;
+    "address": HTMLElement;
+    "article": HTMLElement;
+    "aside": HTMLElement;
+    "b": HTMLElement;
+    "bdo": HTMLElement;
+    "big": HTMLElement;
+    "center": HTMLElement;
+    "circle": SVGCircleElement;
+    "cite": HTMLElement;
+    "clippath": SVGClipPathElement;
+    "code": HTMLElement;
+    "dd": HTMLElement;
+    "defs": SVGDefsElement;
+    "desc": SVGDescElement;
+    "dfn": HTMLElement;
+    "dt": HTMLElement;
+    "ellipse": SVGEllipseElement;
+    "em": HTMLElement;
+    "feblend": SVGFEBlendElement;
+    "fecolormatrix": SVGFEColorMatrixElement;
+    "fecomponenttransfer": SVGFEComponentTransferElement;
+    "fecomposite": SVGFECompositeElement;
+    "feconvolvematrix": SVGFEConvolveMatrixElement;
+    "fediffuselighting": SVGFEDiffuseLightingElement;
+    "fedisplacementmap": SVGFEDisplacementMapElement;
+    "fedistantlight": SVGFEDistantLightElement;
+    "feflood": SVGFEFloodElement;
+    "fefunca": SVGFEFuncAElement;
+    "fefuncb": SVGFEFuncBElement;
+    "fefuncg": SVGFEFuncGElement;
+    "fefuncr": SVGFEFuncRElement;
+    "fegaussianblur": SVGFEGaussianBlurElement;
+    "feimage": SVGFEImageElement;
+    "femerge": SVGFEMergeElement;
+    "femergenode": SVGFEMergeNodeElement;
+    "femorphology": SVGFEMorphologyElement;
+    "feoffset": SVGFEOffsetElement;
+    "fepointlight": SVGFEPointLightElement;
+    "fespecularlighting": SVGFESpecularLightingElement;
+    "fespotlight": SVGFESpotLightElement;
+    "fetile": SVGFETileElement;
+    "feturbulence": SVGFETurbulenceElement;
+    "figcaption": HTMLElement;
+    "figure": HTMLElement;
+    "filter": SVGFilterElement;
+    "footer": HTMLElement;
+    "foreignobject": SVGForeignObjectElement;
+    "g": SVGGElement;
+    "header": HTMLElement;
+    "hgroup": HTMLElement;
+    "i": HTMLElement;
+    "image": SVGImageElement;
+    "kbd": HTMLElement;
+    "keygen": HTMLElement;
+    "line": SVGLineElement;
+    "lineargradient": SVGLinearGradientElement;
+    "mark": HTMLElement;
+    "marker": SVGMarkerElement;
+    "mask": SVGMaskElement;
+    "metadata": SVGMetadataElement;
+    "nav": HTMLElement;
+    "nobr": HTMLElement;
+    "noframes": HTMLElement;
+    "noscript": HTMLElement;
+    "path": SVGPathElement;
+    "pattern": SVGPatternElement;
+    "plaintext": HTMLElement;
+    "polygon": SVGPolygonElement;
+    "polyline": SVGPolylineElement;
+    "radialgradient": SVGRadialGradientElement;
+    "rect": SVGRectElement;
+    "rt": HTMLElement;
+    "ruby": HTMLElement;
+    "s": HTMLElement;
+    "samp": HTMLElement;
+    "section": HTMLElement;
+    "small": HTMLElement;
+    "stop": SVGStopElement;
+    "strike": HTMLElement;
+    "strong": HTMLElement;
+    "sub": HTMLElement;
+    "sup": HTMLElement;
+    "svg": SVGSVGElement;
+    "switch": SVGSwitchElement;
+    "symbol": SVGSymbolElement;
+    "text": SVGTextElement;
+    "textpath": SVGTextPathElement;
+    "tspan": SVGTSpanElement;
+    "tt": HTMLElement;
+    "u": HTMLElement;
+    "use": SVGUseElement;
+    "var": HTMLElement;
+    "view": SVGViewElement;
+    "wbr": HTMLElement;
+}
+
+type ElementListTagNameMap = {
+    [key in keyof ElementTagNameMap]: NodeListOf<ElementTagNameMap[key]>
+};
+
+declare var Audio: { new(src?: string): HTMLAudioElement; };
+declare var Image: { new(width?: number, height?: number): HTMLImageElement; };
+declare var Option: { new(text?: string, value?: string, defaultSelected?: boolean, selected?: boolean): HTMLOptionElement; };
+declare var applicationCache: ApplicationCache;
+declare var caches: CacheStorage;
+declare var clientInformation: Navigator;
+declare var closed: boolean;
+declare var crypto: Crypto;
+declare var defaultStatus: string;
+declare var devicePixelRatio: number;
+declare var document: Document;
+declare var doNotTrack: string;
+declare var event: Event | undefined;
+declare var external: External;
+declare var frameElement: Element;
+declare var frames: Window;
+declare var history: History;
+declare var innerHeight: number;
+declare var innerWidth: number;
+declare var isSecureContext: boolean;
+declare var length: number;
+declare var location: Location;
+declare var locationbar: BarProp;
+declare var menubar: BarProp;
+declare var msContentScript: ExtensionScriptApis;
+declare var msCredentials: MSCredentials;
+declare const name: never;
+declare var navigator: Navigator;
+declare var offscreenBuffering: string | boolean;
+declare var onabort: (this: Window, ev: UIEvent) => any;
+declare var onafterprint: (this: Window, ev: Event) => any;
+declare var onbeforeprint: (this: Window, ev: Event) => any;
+declare var onbeforeunload: (this: Window, ev: BeforeUnloadEvent) => any;
+declare var onblur: (this: Window, ev: FocusEvent) => any;
+declare var oncanplay: (this: Window, ev: Event) => any;
+declare var oncanplaythrough: (this: Window, ev: Event) => any;
+declare var onchange: (this: Window, ev: Event) => any;
+declare var onclick: (this: Window, ev: MouseEvent) => any;
+declare var oncompassneedscalibration: (this: Window, ev: Event) => any;
+declare var oncontextmenu: (this: Window, ev: PointerEvent) => any;
+declare var ondblclick: (this: Window, ev: MouseEvent) => any;
+declare var ondevicelight: (this: Window, ev: DeviceLightEvent) => any;
+declare var ondevicemotion: (this: Window, ev: DeviceMotionEvent) => any;
+declare var ondeviceorientation: (this: Window, ev: DeviceOrientationEvent) => any;
+declare var ondrag: (this: Window, ev: DragEvent) => any;
+declare var ondragend: (this: Window, ev: DragEvent) => any;
+declare var ondragenter: (this: Window, ev: DragEvent) => any;
+declare var ondragleave: (this: Window, ev: DragEvent) => any;
+declare var ondragover: (this: Window, ev: DragEvent) => any;
+declare var ondragstart: (this: Window, ev: DragEvent) => any;
+declare var ondrop: (this: Window, ev: DragEvent) => any;
+declare var ondurationchange: (this: Window, ev: Event) => any;
+declare var onemptied: (this: Window, ev: Event) => any;
+declare var onended: (this: Window, ev: MediaStreamErrorEvent) => any;
+declare var onerror: ErrorEventHandler;
+declare var onfocus: (this: Window, ev: FocusEvent) => any;
+declare var onhashchange: (this: Window, ev: HashChangeEvent) => any;
+declare var oninput: (this: Window, ev: Event) => any;
+declare var oninvalid: (this: Window, ev: Event) => any;
+declare var onkeydown: (this: Window, ev: KeyboardEvent) => any;
+declare var onkeypress: (this: Window, ev: KeyboardEvent) => any;
+declare var onkeyup: (this: Window, ev: KeyboardEvent) => any;
+declare var onload: (this: Window, ev: Event) => any;
+declare var onloadeddata: (this: Window, ev: Event) => any;
+declare var onloadedmetadata: (this: Window, ev: Event) => any;
+declare var onloadstart: (this: Window, ev: Event) => any;
+declare var onmessage: (this: Window, ev: MessageEvent) => any;
+declare var onmousedown: (this: Window, ev: MouseEvent) => any;
+declare var onmouseenter: (this: Window, ev: MouseEvent) => any;
+declare var onmouseleave: (this: Window, ev: MouseEvent) => any;
+declare var onmousemove: (this: Window, ev: MouseEvent) => any;
+declare var onmouseout: (this: Window, ev: MouseEvent) => any;
+declare var onmouseover: (this: Window, ev: MouseEvent) => any;
+declare var onmouseup: (this: Window, ev: MouseEvent) => any;
+declare var onmousewheel: (this: Window, ev: WheelEvent) => any;
+declare var onmsgesturechange: (this: Window, ev: MSGestureEvent) => any;
+declare var onmsgesturedoubletap: (this: Window, ev: MSGestureEvent) => any;
+declare var onmsgestureend: (this: Window, ev: MSGestureEvent) => any;
+declare var onmsgesturehold: (this: Window, ev: MSGestureEvent) => any;
+declare var onmsgesturestart: (this: Window, ev: MSGestureEvent) => any;
+declare var onmsgesturetap: (this: Window, ev: MSGestureEvent) => any;
+declare var onmsinertiastart: (this: Window, ev: MSGestureEvent) => any;
+declare var onmspointercancel: (this: Window, ev: MSPointerEvent) => any;
+declare var onmspointerdown: (this: Window, ev: MSPointerEvent) => any;
+declare var onmspointerenter: (this: Window, ev: MSPointerEvent) => any;
+declare var onmspointerleave: (this: Window, ev: MSPointerEvent) => any;
+declare var onmspointermove: (this: Window, ev: MSPointerEvent) => any;
+declare var onmspointerout: (this: Window, ev: MSPointerEvent) => any;
+declare var onmspointerover: (this: Window, ev: MSPointerEvent) => any;
+declare var onmspointerup: (this: Window, ev: MSPointerEvent) => any;
+declare var onoffline: (this: Window, ev: Event) => any;
+declare var ononline: (this: Window, ev: Event) => any;
+declare var onorientationchange: (this: Window, ev: Event) => any;
+declare var onpagehide: (this: Window, ev: PageTransitionEvent) => any;
+declare var onpageshow: (this: Window, ev: PageTransitionEvent) => any;
+declare var onpause: (this: Window, ev: Event) => any;
+declare var onplay: (this: Window, ev: Event) => any;
+declare var onplaying: (this: Window, ev: Event) => any;
+declare var onpopstate: (this: Window, ev: PopStateEvent) => any;
+declare var onprogress: (this: Window, ev: ProgressEvent) => any;
+declare var onratechange: (this: Window, ev: Event) => any;
+declare var onreadystatechange: (this: Window, ev: ProgressEvent) => any;
+declare var onreset: (this: Window, ev: Event) => any;
+declare var onresize: (this: Window, ev: UIEvent) => any;
+declare var onscroll: (this: Window, ev: UIEvent) => any;
+declare var onseeked: (this: Window, ev: Event) => any;
+declare var onseeking: (this: Window, ev: Event) => any;
+declare var onselect: (this: Window, ev: UIEvent) => any;
+declare var onstalled: (this: Window, ev: Event) => any;
+declare var onstorage: (this: Window, ev: StorageEvent) => any;
+declare var onsubmit: (this: Window, ev: Event) => any;
+declare var onsuspend: (this: Window, ev: Event) => any;
+declare var ontimeupdate: (this: Window, ev: Event) => any;
+declare var ontouchcancel: (ev: TouchEvent) => any;
+declare var ontouchend: (ev: TouchEvent) => any;
+declare var ontouchmove: (ev: TouchEvent) => any;
+declare var ontouchstart: (ev: TouchEvent) => any;
+declare var onunload: (this: Window, ev: Event) => any;
+declare var onvolumechange: (this: Window, ev: Event) => any;
+declare var onwaiting: (this: Window, ev: Event) => any;
+declare var opener: any;
+declare var orientation: string | number;
+declare var outerHeight: number;
+declare var outerWidth: number;
+declare var pageXOffset: number;
+declare var pageYOffset: number;
+declare var parent: Window;
+declare var performance: Performance;
+declare var personalbar: BarProp;
+declare var screen: Screen;
+declare var screenLeft: number;
+declare var screenTop: number;
+declare var screenX: number;
+declare var screenY: number;
+declare var scrollbars: BarProp;
+declare var scrollX: number;
+declare var scrollY: number;
+declare var self: Window;
+declare var speechSynthesis: SpeechSynthesis;
+declare var status: string;
+declare var statusbar: BarProp;
+declare var styleMedia: StyleMedia;
+declare var toolbar: BarProp;
+declare var top: Window;
+declare var window: Window;
+declare var customElements: CustomElementRegistry;
+declare function alert(message?: any): void;
+declare function blur(): void;
+declare function cancelAnimationFrame(handle: number): void;
+declare function captureEvents(): void;
+declare function close(): void;
+declare function confirm(message?: string): boolean;
+declare function departFocus(navigationReason: NavigationReason, origin: FocusNavigationOrigin): void;
+declare function focus(): void;
+declare function getComputedStyle(elt: Element, pseudoElt?: string): CSSStyleDeclaration;
+declare function getMatchedCSSRules(elt: Element, pseudoElt?: string): CSSRuleList;
+declare function getSelection(): Selection;
+declare function matchMedia(mediaQuery: string): MediaQueryList;
+declare function moveBy(x?: number, y?: number): void;
+declare function moveTo(x?: number, y?: number): void;
+declare function msWriteProfilerMark(profilerMarkName: string): void;
+declare function open(url?: string, target?: string, features?: string, replace?: boolean): Window;
+declare function postMessage(message: any, targetOrigin: string, transfer?: any[]): void;
+declare function print(): void;
+declare function prompt(message?: string, _default?: string): string | null;
+declare function releaseEvents(): void;
+declare function requestAnimationFrame(callback: FrameRequestCallback): number;
+declare function resizeBy(x?: number, y?: number): void;
+declare function resizeTo(x?: number, y?: number): void;
+declare function scroll(x?: number, y?: number): void;
+declare function scrollBy(x?: number, y?: number): void;
+declare function scrollTo(x?: number, y?: number): void;
+declare function stop(): void;
+declare function webkitCancelAnimationFrame(handle: number): void;
+declare function webkitConvertPointFromNodeToPage(node: Node, pt: WebKitPoint): WebKitPoint;
+declare function webkitConvertPointFromPageToNode(node: Node, pt: WebKitPoint): WebKitPoint;
+declare function webkitRequestAnimationFrame(callback: FrameRequestCallback): number;
+declare function createImageBitmap(image: HTMLImageElement | SVGImageElement | HTMLVideoElement | HTMLCanvasElement | ImageBitmap | ImageData | Blob, options?: ImageBitmapOptions): Promise<ImageBitmap>;
+declare function createImageBitmap(image: HTMLImageElement | SVGImageElement | HTMLVideoElement | HTMLCanvasElement | ImageBitmap | ImageData | Blob, sx: number, sy: number, sw: number, sh: number, options?: ImageBitmapOptions): Promise<ImageBitmap>;
+declare function scroll(options?: ScrollToOptions): void;
+declare function scrollTo(options?: ScrollToOptions): void;
+declare function scrollBy(options?: ScrollToOptions): void;
+declare function toString(): string;
+declare function dispatchEvent(evt: Event): boolean;
+declare function removeEventListener(type: string, listener?: EventListenerOrEventListenerObject, options?: boolean | EventListenerOptions): void;
+declare function clearInterval(handle: number): void;
+declare function clearTimeout(handle: number): void;
+declare function setInterval(handler: (...args: any[]) => void, timeout: number): number;
+declare function setInterval(handler: any, timeout?: any, ...args: any[]): number;
+declare function setTimeout(handler: (...args: any[]) => void, timeout: number): number;
+declare function setTimeout(handler: any, timeout?: any, ...args: any[]): number;
+declare function clearImmediate(handle: number): void;
+declare function setImmediate(handler: (...args: any[]) => void): number;
+declare function setImmediate(handler: any, ...args: any[]): number;
+declare var sessionStorage: Storage;
+declare var localStorage: Storage;
+declare var console: Console;
+declare var onpointercancel: (this: Window, ev: PointerEvent) => any;
+declare var onpointerdown: (this: Window, ev: PointerEvent) => any;
+declare var onpointerenter: (this: Window, ev: PointerEvent) => any;
+declare var onpointerleave: (this: Window, ev: PointerEvent) => any;
+declare var onpointermove: (this: Window, ev: PointerEvent) => any;
+declare var onpointerout: (this: Window, ev: PointerEvent) => any;
+declare var onpointerover: (this: Window, ev: PointerEvent) => any;
+declare var onpointerup: (this: Window, ev: PointerEvent) => any;
+declare var onwheel: (this: Window, ev: WheelEvent) => any;
+declare var indexedDB: IDBFactory;
+declare function atob(encodedString: string): string;
+declare function btoa(rawString: string): string;
+declare function fetch(input: RequestInfo, init?: RequestInit): Promise<Response>;
+declare function addEventListener<K extends keyof WindowEventMap>(type: K, listener: (this: Window, ev: WindowEventMap[K]) => any, useCapture?: boolean): void;
+declare function addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+type AAGUID = string;
+type AlgorithmIdentifier = string | Algorithm;
+type BodyInit = any;
+type ByteString = string;
+type ConstrainBoolean = boolean | ConstrainBooleanParameters;
+type ConstrainDOMString = string | string[] | ConstrainDOMStringParameters;
+type ConstrainDouble = number | ConstrainDoubleRange;
+type ConstrainLong = number | ConstrainLongRange;
+type CryptoOperationData = ArrayBufferView;
+type GLbitfield = number;
+type GLboolean = boolean;
+type GLbyte = number;
+type GLclampf = number;
+type GLenum = number;
+type GLfloat = number;
+type GLint = number;
+type GLintptr = number;
+type GLshort = number;
+type GLsizei = number;
+type GLsizeiptr = number;
+type GLubyte = number;
+type GLuint = number;
+type GLushort = number;
+type HeadersInit = any;
+type IDBKeyPath = string;
+type KeyFormat = string;
+type KeyType = string;
+type KeyUsage = string;
+type MSInboundPayload = MSVideoRecvPayload | MSAudioRecvPayload;
+type MSLocalClientEvent = MSLocalClientEventBase | MSAudioLocalClientEvent;
+type MSOutboundPayload = MSVideoSendPayload | MSAudioSendPayload;
+type RTCIceGatherCandidate = RTCIceCandidateDictionary | RTCIceCandidateComplete;
+type RTCTransport = RTCDtlsTransport | RTCSrtpSdesTransport;
+type RequestInfo = Request | string;
+type USVString = string;
+type payloadtype = number;
+type ScrollBehavior = "auto" | "instant" | "smooth";
+type ScrollLogicalPosition = "start" | "center" | "end" | "nearest";
+type IDBValidKey = number | string | Date | IDBArrayKey;
+type BufferSource = ArrayBuffer | ArrayBufferView;
+type MouseWheelEvent = WheelEvent;
+type ScrollRestoration = "auto" | "manual";
+type FormDataEntryValue = string | File;
+type InsertPosition = "beforebegin" | "afterbegin" | "beforeend" | "afterend";
+type AppendMode = "segments" | "sequence";
+type AudioContextState = "suspended" | "running" | "closed";
+type BiquadFilterType = "lowpass" | "highpass" | "bandpass" | "lowshelf" | "highshelf" | "peaking" | "notch" | "allpass";
+type CanvasFillRule = "nonzero" | "evenodd";
+type ChannelCountMode = "max" | "clamped-max" | "explicit";
+type ChannelInterpretation = "speakers" | "discrete";
+type DistanceModelType = "linear" | "inverse" | "exponential";
+type ExpandGranularity = "character" | "word" | "sentence" | "textedit";
+type GamepadInputEmulationType = "mouse" | "keyboard" | "gamepad";
+type IDBCursorDirection = "next" | "nextunique" | "prev" | "prevunique";
+type IDBRequestReadyState = "pending" | "done";
+type IDBTransactionMode = "readonly" | "readwrite" | "versionchange";
+type ListeningState = "inactive" | "active" | "disambiguation";
+type MediaDeviceKind = "audioinput" | "audiooutput" | "videoinput";
+type MediaKeyMessageType = "license-request" | "license-renewal" | "license-release" | "individualization-request";
+type MediaKeySessionType = "temporary" | "persistent-license" | "persistent-release-message";
+type MediaKeysRequirement = "required" | "optional" | "not-allowed";
+type MediaKeyStatus = "usable" | "expired" | "output-downscaled" | "output-not-allowed" | "status-pending" | "internal-error";
+type MediaStreamTrackState = "live" | "ended";
+type MSCredentialType = "FIDO_2_0";
+type MSIceAddrType = "os" | "stun" | "turn" | "peer-derived";
+type MSIceType = "failed" | "direct" | "relay";
+type MSStatsType = "description" | "localclientevent" | "inbound-network" | "outbound-network" | "inbound-payload" | "outbound-payload" | "transportdiagnostics";
+type MSTransportType = "Embedded" | "USB" | "NFC" | "BT";
+type MSWebViewPermissionState = "unknown" | "defer" | "allow" | "deny";
+type MSWebViewPermissionType = "geolocation" | "unlimitedIndexedDBQuota" | "media" | "pointerlock" | "webnotifications";
+type NavigationReason = "up" | "down" | "left" | "right";
+type NavigationType = "navigate" | "reload" | "back_forward" | "prerender";
+type NotificationDirection = "auto" | "ltr" | "rtl";
+type NotificationPermission = "default" | "denied" | "granted";
+type OscillatorType = "sine" | "square" | "sawtooth" | "triangle" | "custom";
+type OverSampleType = "none" | "2x" | "4x";
+type PanningModelType = "equalpower";
+type PaymentComplete = "success" | "fail" | "";
+type PaymentShippingType = "shipping" | "delivery" | "pickup";
+type PushEncryptionKeyName = "p256dh" | "auth";
+type PushPermissionState = "granted" | "denied" | "prompt";
+type ReferrerPolicy = "" | "no-referrer" | "no-referrer-when-downgrade" | "origin-only" | "origin-when-cross-origin" | "unsafe-url";
+type RequestCache = "default" | "no-store" | "reload" | "no-cache" | "force-cache";
+type RequestCredentials = "omit" | "same-origin" | "include";
+type RequestDestination = "" | "document" | "sharedworker" | "subresource" | "unknown" | "worker";
+type RequestMode = "navigate" | "same-origin" | "no-cors" | "cors";
+type RequestRedirect = "follow" | "error" | "manual";
+type RequestType = "" | "audio" | "font" | "image" | "script" | "style" | "track" | "video";
+type ResponseType = "basic" | "cors" | "default" | "error" | "opaque" | "opaqueredirect";
+type RTCBundlePolicy = "balanced" | "max-compat" | "max-bundle";
+type RTCDegradationPreference = "maintain-framerate" | "maintain-resolution" | "balanced";
+type RTCDtlsRole = "auto" | "client" | "server";
+type RTCDtlsTransportState = "new" | "connecting" | "connected" | "closed";
+type RTCIceCandidateType = "host" | "srflx" | "prflx" | "relay";
+type RTCIceComponent = "RTP" | "RTCP";
+type RTCIceConnectionState = "new" | "checking" | "connected" | "completed" | "failed" | "disconnected" | "closed";
+type RTCIceGathererState = "new" | "gathering" | "complete";
+type RTCIceGatheringState = "new" | "gathering" | "complete";
+type RTCIceGatherPolicy = "all" | "nohost" | "relay";
+type RTCIceProtocol = "udp" | "tcp";
+type RTCIceRole = "controlling" | "controlled";
+type RTCIceTcpCandidateType = "active" | "passive" | "so";
+type RTCIceTransportPolicy = "none" | "relay" | "all";
+type RTCIceTransportState = "new" | "checking" | "connected" | "completed" | "disconnected" | "closed";
+type RTCSdpType = "offer" | "pranswer" | "answer";
+type RTCSignalingState = "stable" | "have-local-offer" | "have-remote-offer" | "have-local-pranswer" | "have-remote-pranswer" | "closed";
+type RTCStatsIceCandidatePairState = "frozen" | "waiting" | "inprogress" | "failed" | "succeeded" | "cancelled";
+type RTCStatsIceCandidateType = "host" | "serverreflexive" | "peerreflexive" | "relayed";
+type RTCStatsType = "inboundrtp" | "outboundrtp" | "session" | "datachannel" | "track" | "transport" | "candidatepair" | "localcandidate" | "remotecandidate";
+type ScopedCredentialType = "ScopedCred";
+type ServiceWorkerState = "installing" | "installed" | "activating" | "activated" | "redundant";
+type Transport = "usb" | "nfc" | "ble";
+type VideoFacingModeEnum = "user" | "environment" | "left" | "right";
+type VisibilityState = "hidden" | "visible" | "prerender" | "unloaded";
+type XMLHttpRequestResponseType = "" | "arraybuffer" | "blob" | "document" | "json" | "text";
\ No newline at end of file
diff --git a/bin/lib.dom.iterable.d.ts b/bin/lib.dom.iterable.d.ts
index 397e0ab..3820991 100644
--- a/bin/lib.dom.iterable.d.ts
+++ b/bin/lib.dom.iterable.d.ts
@@ -1,29 +1,127 @@
-/*! *****************************************************************************
-Copyright (c) Microsoft Corporation. All rights reserved. 
-Licensed under the Apache License, Version 2.0 (the "License"); you may not use
-this file except in compliance with the License. You may obtain a copy of the
-License at http://www.apache.org/licenses/LICENSE-2.0  
- 
-THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
-WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
-MERCHANTABLITY OR NON-INFRINGEMENT. 
- 
-See the Apache Version 2.0 License for specific language governing permissions
-and limitations under the License.
-***************************************************************************** */
-
-/// <reference no-default-lib="true"/>
-/// <reference path="lib.dom.d.ts" />
-
-interface DOMTokenList {
-    [Symbol.iterator](): IterableIterator<string>;
-}
-
-interface NodeList {
-    [Symbol.iterator](): IterableIterator<Node>
-}
-
-interface NodeListOf<TNode extends Node> {
-    [Symbol.iterator](): IterableIterator<TNode>
-}
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved. 
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0  
+ 
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
+MERCHANTABLITY OR NON-INFRINGEMENT. 
+ 
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+
+
+
+/// <reference no-default-lib="true"/>
+
+
+/// <reference path="lib.dom.d.ts" />
+
+interface DOMTokenList {
+    [Symbol.iterator](): IterableIterator<string>;
+}
+
+interface FormData {
+    /**
+     * Returns an array of key, value pairs for every entry in the list
+     */
+    entries(): IterableIterator<[string, string | File]>;
+    /**
+     * Returns a list of keys in the list
+     */
+    keys(): IterableIterator<string>;
+    /**
+     * Returns a list of values in the list
+     */
+    values(): IterableIterator<string | File>;
+
+    [Symbol.iterator](): IterableIterator<string | File>;
+}
+
+interface Headers {
+    [Symbol.iterator](): IterableIterator<[string, string]>;
+    /**
+     * Returns an iterator allowing to go through all key/value pairs contained in this object.
+     */
+    entries(): IterableIterator<[string, string]>;
+    /**
+     * Returns an iterator allowing to go through all keys f the key/value pairs contained in this object.
+     */
+    keys(): IterableIterator<string>;
+    /**
+     * Returns an iterator allowing to go through all values of the key/value pairs contained in this object.
+     */
+    values(): IterableIterator<string>;
+}
+
+interface NodeList {
+    /**
+     * Returns an array of key, value pairs for every entry in the list
+     */
+    entries(): IterableIterator<[number, Node]>;
+    /**
+     * Performs the specified action for each node in an list.
+     * @param callbackfn  A function that accepts up to three arguments. forEach calls the callbackfn function one time for each element in the list.
+     * @param thisArg  An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
+     */
+    forEach(callbackfn: (value: Node, index: number, listObj: NodeList) => void, thisArg?: any): void;
+    /**
+     * Returns an list of keys in the list
+     */
+    keys(): IterableIterator<number>;
+
+    /**
+     * Returns an list of values in the list
+     */
+    values(): IterableIterator<Node>;
+
+
+    [Symbol.iterator](): IterableIterator<Node>;
+}
+
+interface NodeListOf<TNode extends Node> {
+
+    /**
+     * Returns an array of key, value pairs for every entry in the list
+     */
+    entries(): IterableIterator<[number, TNode]>;
+
+    /**
+     * Performs the specified action for each node in an list.
+     * @param callbackfn  A function that accepts up to three arguments. forEach calls the callbackfn function one time for each element in the list.
+     * @param thisArg  An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
+     */
+    forEach(callbackfn: (value: TNode, index: number, listObj: NodeListOf<TNode>) => void, thisArg?: any): void;
+    /**
+     * Returns an list of keys in the list
+     */
+    keys(): IterableIterator<number>;
+    /**
+     * Returns an list of values in the list
+     */
+    values(): IterableIterator<TNode>;
+
+    [Symbol.iterator](): IterableIterator<TNode>;
+}
+
+interface URLSearchParams {
+    /**
+     * Returns an array of key, value pairs for every entry in the search params
+     */
+    entries(): IterableIterator<[string, string]>;
+    /**
+     * Returns a list of keys in the search params
+     */
+    keys(): IterableIterator<string>;
+    /**
+     * Returns a list of values in the search params
+     */
+    values(): IterableIterator<string>;
+    /**
+     * iterate over key/value pairs
+     */
+    [Symbol.iterator](): IterableIterator<[string, string]>;
+}
diff --git a/bin/lib.es2015.collection.d.ts b/bin/lib.es2015.collection.d.ts
index 24c737d..4d84af4 100644
--- a/bin/lib.es2015.collection.d.ts
+++ b/bin/lib.es2015.collection.d.ts
@@ -1,88 +1,92 @@
-/*! *****************************************************************************
-Copyright (c) Microsoft Corporation. All rights reserved. 
-Licensed under the Apache License, Version 2.0 (the "License"); you may not use
-this file except in compliance with the License. You may obtain a copy of the
-License at http://www.apache.org/licenses/LICENSE-2.0  
- 
-THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
-WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
-MERCHANTABLITY OR NON-INFRINGEMENT. 
- 
-See the Apache Version 2.0 License for specific language governing permissions
-and limitations under the License.
-***************************************************************************** */
-
-/// <reference no-default-lib="true"/>
-interface Map<K, V> {
-    clear(): void;
-    delete(key: K): boolean;
-    forEach(callbackfn: (value: V, key: K, map: Map<K, V>) => void, thisArg?: any): void;
-    get(key: K): V | undefined;
-    has(key: K): boolean;
-    set(key: K, value?: V): this;
-    readonly size: number;
-}
-
-interface MapConstructor {
-    new (): Map<any, any>;
-    new <K, V>(entries?: [K, V][]): Map<K, V>;
-    readonly prototype: Map<any, any>;
-}
-declare var Map: MapConstructor;
-
-interface ReadonlyMap<K, V> {
-    forEach(callbackfn: (value: V, key: K, map: ReadonlyMap<K, V>) => void, thisArg?: any): void;
-    get(key: K): V|undefined;
-    has(key: K): boolean;
-    readonly size: number;
-}
-
-interface WeakMap<K, V> {
-    delete(key: K): boolean;
-    get(key: K): V | undefined;
-    has(key: K): boolean;
-    set(key: K, value?: V): this;
-}
-
-interface WeakMapConstructor {
-    new (): WeakMap<any, any>;
-    new <K, V>(entries?: [K, V][]): WeakMap<K, V>;
-    readonly prototype: WeakMap<any, any>;
-}
-declare var WeakMap: WeakMapConstructor;
-
-interface Set<T> {
-    add(value: T): this;
-    clear(): void;
-    delete(value: T): boolean;
-    forEach(callbackfn: (value: T, value2: T, set: Set<T>) => void, thisArg?: any): void;
-    has(value: T): boolean;
-    readonly size: number;
-}
-
-interface SetConstructor {
-    new (): Set<any>;
-    new <T>(values?: T[]): Set<T>;
-    readonly prototype: Set<any>;
-}
-declare var Set: SetConstructor;
-
-interface ReadonlySet<T> {
-    forEach(callbackfn: (value: T, value2: T, set: ReadonlySet<T>) => void, thisArg?: any): void;
-    has(value: T): boolean;
-    readonly size: number;
-}
-
-interface WeakSet<T> {
-    add(value: T): this;
-    delete(value: T): boolean;
-    has(value: T): boolean;
-}
-
-interface WeakSetConstructor {
-    new (): WeakSet<any>;
-    new <T>(values?: T[]): WeakSet<T>;
-    readonly prototype: WeakSet<any>;
-}
-declare var WeakSet: WeakSetConstructor;
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved. 
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0  
+ 
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
+MERCHANTABLITY OR NON-INFRINGEMENT. 
+ 
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+
+
+
+/// <reference no-default-lib="true"/>
+
+
+interface Map<K, V> {
+    clear(): void;
+    delete(key: K): boolean;
+    forEach(callbackfn: (value: V, key: K, map: Map<K, V>) => void, thisArg?: any): void;
+    get(key: K): V | undefined;
+    has(key: K): boolean;
+    set(key: K, value: V): this;
+    readonly size: number;
+}
+
+interface MapConstructor {
+    new (): Map<any, any>;
+    new <K, V>(entries?: [K, V][]): Map<K, V>;
+    readonly prototype: Map<any, any>;
+}
+declare var Map: MapConstructor;
+
+interface ReadonlyMap<K, V> {
+    forEach(callbackfn: (value: V, key: K, map: ReadonlyMap<K, V>) => void, thisArg?: any): void;
+    get(key: K): V | undefined;
+    has(key: K): boolean;
+    readonly size: number;
+}
+
+interface WeakMap<K extends object, V> {
+    delete(key: K): boolean;
+    get(key: K): V | undefined;
+    has(key: K): boolean;
+    set(key: K, value: V): this;
+}
+
+interface WeakMapConstructor {
+    new (): WeakMap<object, any>;
+    new <K extends object, V>(entries?: [K, V][]): WeakMap<K, V>;
+    readonly prototype: WeakMap<object, any>;
+}
+declare var WeakMap: WeakMapConstructor;
+
+interface Set<T> {
+    add(value: T): this;
+    clear(): void;
+    delete(value: T): boolean;
+    forEach(callbackfn: (value: T, value2: T, set: Set<T>) => void, thisArg?: any): void;
+    has(value: T): boolean;
+    readonly size: number;
+}
+
+interface SetConstructor {
+    new (): Set<any>;
+    new <T>(values?: T[]): Set<T>;
+    readonly prototype: Set<any>;
+}
+declare var Set: SetConstructor;
+
+interface ReadonlySet<T> {
+    forEach(callbackfn: (value: T, value2: T, set: ReadonlySet<T>) => void, thisArg?: any): void;
+    has(value: T): boolean;
+    readonly size: number;
+}
+
+interface WeakSet<T> {
+    add(value: T): this;
+    delete(value: T): boolean;
+    has(value: T): boolean;
+}
+
+interface WeakSetConstructor {
+    new (): WeakSet<object>;
+    new <T extends object>(values?: T[]): WeakSet<T>;
+    readonly prototype: WeakSet<object>;
+}
+declare var WeakSet: WeakSetConstructor;
diff --git a/bin/lib.es2015.core.d.ts b/bin/lib.es2015.core.d.ts
index 49a81a2..bf2edb8 100644
--- a/bin/lib.es2015.core.d.ts
+++ b/bin/lib.es2015.core.d.ts
@@ -1,540 +1,554 @@
-/*! *****************************************************************************
-Copyright (c) Microsoft Corporation. All rights reserved. 
-Licensed under the Apache License, Version 2.0 (the "License"); you may not use
-this file except in compliance with the License. You may obtain a copy of the
-License at http://www.apache.org/licenses/LICENSE-2.0  
- 
-THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
-WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
-MERCHANTABLITY OR NON-INFRINGEMENT. 
- 
-See the Apache Version 2.0 License for specific language governing permissions
-and limitations under the License.
-***************************************************************************** */
-
-/// <reference no-default-lib="true"/>
-declare type PropertyKey = string | number | symbol;
-
-interface Array<T> {
-    /**
-      * Returns the value of the first element in the array where predicate is true, and undefined
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found, find
-      * immediately returns that element value. Otherwise, find returns undefined.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    find(predicate: (value: T, index: number, obj: Array<T>) => boolean, thisArg?: any): T | undefined;
-
-    /**
-      * Returns the index of the first element in the array where predicate is true, and -1
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found,
-      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    findIndex(predicate: (value: T, index: number, obj: Array<T>) => boolean, thisArg?: any): number;
-
-    /**
-      * Returns the this object after filling the section identified by start and end with value
-      * @param value value to fill array section with
-      * @param start index to start filling the array at. If start is negative, it is treated as
-      * length+start where length is the length of the array.
-      * @param end index to stop filling the array at. If end is negative, it is treated as
-      * length+end.
-      */
-    fill(value: T, start?: number, end?: number): this;
-
-    /**
-      * Returns the this object after copying a section of the array identified by start and end
-      * to the same array starting at position target
-      * @param target If target is negative, it is treated as length+target where length is the
-      * length of the array.
-      * @param start If start is negative, it is treated as length+start. If end is negative, it
-      * is treated as length+end.
-      * @param end If not specified, length of the this object is used as its default value.
-      */
-    copyWithin(target: number, start: number, end?: number): this;
-}
-
-interface ArrayConstructor {
-    /**
-      * Creates an array from an array-like object.
-      * @param arrayLike An array-like object to convert to an array.
-      * @param mapfn A mapping function to call on every element of the array.
-      * @param thisArg Value of 'this' used to invoke the mapfn.
-      */
-    from<T, U>(arrayLike: ArrayLike<T>, mapfn: (v: T, k: number) => U, thisArg?: any): Array<U>;
-
-
-    /**
-      * Creates an array from an array-like object.
-      * @param arrayLike An array-like object to convert to an array.
-      */
-    from<T>(arrayLike: ArrayLike<T>): Array<T>;
-
-    /**
-      * Returns a new array from a set of elements.
-      * @param items A set of elements to include in the new array object.
-      */
-    of<T>(...items: T[]): Array<T>;
-}
-
-interface DateConstructor {
-    new (value: Date): Date;
-}
-
-interface Function {
-    /**
-      * Returns the name of the function. Function names are read-only and can not be changed.
-      */
-    readonly name: string;
-}
-
-interface Math {
-    /**
-      * Returns the number of leading zero bits in the 32-bit binary representation of a number.
-      * @param x A numeric expression.
-      */
-    clz32(x: number): number;
-
-    /**
-      * Returns the result of 32-bit multiplication of two numbers.
-      * @param x First number
-      * @param y Second number
-      */
-    imul(x: number, y: number): number;
-
-    /**
-      * Returns the sign of the x, indicating whether x is positive, negative or zero.
-      * @param x The numeric expression to test
-      */
-    sign(x: number): number;
-
-    /**
-      * Returns the base 10 logarithm of a number.
-      * @param x A numeric expression.
-      */
-    log10(x: number): number;
-
-    /**
-      * Returns the base 2 logarithm of a number.
-      * @param x A numeric expression.
-      */
-    log2(x: number): number;
-
-    /**
-      * Returns the natural logarithm of 1 + x.
-      * @param x A numeric expression.
-      */
-    log1p(x: number): number;
-
-    /**
-      * Returns the result of (e^x - 1) of x (e raised to the power of x, where e is the base of
-      * the natural logarithms).
-      * @param x A numeric expression.
-      */
-    expm1(x: number): number;
-
-    /**
-      * Returns the hyperbolic cosine of a number.
-      * @param x A numeric expression that contains an angle measured in radians.
-      */
-    cosh(x: number): number;
-
-    /**
-      * Returns the hyperbolic sine of a number.
-      * @param x A numeric expression that contains an angle measured in radians.
-      */
-    sinh(x: number): number;
-
-    /**
-      * Returns the hyperbolic tangent of a number.
-      * @param x A numeric expression that contains an angle measured in radians.
-      */
-    tanh(x: number): number;
-
-    /**
-      * Returns the inverse hyperbolic cosine of a number.
-      * @param x A numeric expression that contains an angle measured in radians.
-      */
-    acosh(x: number): number;
-
-    /**
-      * Returns the inverse hyperbolic sine of a number.
-      * @param x A numeric expression that contains an angle measured in radians.
-      */
-    asinh(x: number): number;
-
-    /**
-      * Returns the inverse hyperbolic tangent of a number.
-      * @param x A numeric expression that contains an angle measured in radians.
-      */
-    atanh(x: number): number;
-
-    /**
-      * Returns the square root of the sum of squares of its arguments.
-      * @param values Values to compute the square root for.
-      *     If no arguments are passed, the result is +0.
-      *     If there is only one argument, the result is the absolute value.
-      *     If any argument is +Infinity or -Infinity, the result is +Infinity.
-      *     If any argument is NaN, the result is NaN.
-      *     If all arguments are either +0 or −0, the result is +0.
-      */
-    hypot(...values: number[] ): number;
-
-    /**
-      * Returns the integral part of the a numeric expression, x, removing any fractional digits.
-      * If x is already an integer, the result is x.
-      * @param x A numeric expression.
-      */
-    trunc(x: number): number;
-
-    /**
-      * Returns the nearest single precision float representation of a number.
-      * @param x A numeric expression.
-      */
-    fround(x: number): number;
-
-    /**
-      * Returns an implementation-dependent approximation to the cube root of number.
-      * @param x A numeric expression.
-      */
-    cbrt(x: number): number;
-}
-
-interface NumberConstructor {
-    /**
-      * The value of Number.EPSILON is the difference between 1 and the smallest value greater than 1
-      * that is representable as a Number value, which is approximately:
-      * 2.2204460492503130808472633361816 x 10‍−‍16.
-      */
-    readonly EPSILON: number;
-
-    /**
-      * Returns true if passed value is finite.
-      * Unlike the global isFininte, Number.isFinite doesn't forcibly convert the parameter to a
-      * number. Only finite values of the type number, result in true.
-      * @param number A numeric value.
-      */
-    isFinite(number: number): boolean;
-
-    /**
-      * Returns true if the value passed is an integer, false otherwise.
-      * @param number A numeric value.
-      */
-    isInteger(number: number): boolean;
-
-    /**
-      * Returns a Boolean value that indicates whether a value is the reserved value NaN (not a
-      * number). Unlike the global isNaN(), Number.isNaN() doesn't forcefully convert the parameter
-      * to a number. Only values of the type number, that are also NaN, result in true.
-      * @param number A numeric value.
-      */
-    isNaN(number: number): boolean;
-
-    /**
-      * Returns true if the value passed is a safe integer.
-      * @param number A numeric value.
-      */
-    isSafeInteger(number: number): boolean;
-
-    /**
-      * The value of the largest integer n such that n and n + 1 are both exactly representable as
-      * a Number value.
-      * The value of Number.MAX_SAFE_INTEGER is 9007199254740991 2^53 − 1.
-      */
-    readonly MAX_SAFE_INTEGER: number;
-
-    /**
-      * The value of the smallest integer n such that n and n − 1 are both exactly representable as
-      * a Number value.
-      * The value of Number.MIN_SAFE_INTEGER is −9007199254740991 (−(2^53 − 1)).
-      */
-    readonly MIN_SAFE_INTEGER: number;
-
-    /**
-      * Converts a string to a floating-point number.
-      * @param string A string that contains a floating-point number.
-      */
-    parseFloat(string: string): number;
-
-    /**
-      * Converts A string to an integer.
-      * @param s A string to convert into a number.
-      * @param radix A value between 2 and 36 that specifies the base of the number in numString.
-      * If this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.
-      * All other strings are considered decimal.
-      */
-    parseInt(string: string, radix?: number): number;
-}
-
-interface Object {
-    /**
-      * Determines whether an object has a property with the specified name.
-      * @param v A property name.
-      */
-    hasOwnProperty(v: PropertyKey): boolean
-
-    /**
-      * Determines whether a specified property is enumerable.
-      * @param v A property name.
-      */
-    propertyIsEnumerable(v: PropertyKey): boolean;
-}
-
-interface ObjectConstructor {
-    /**
-      * Copy the values of all of the enumerable own properties from one or more source objects to a
-      * target object. Returns the target object.
-      * @param target The target object to copy to.
-      * @param source The source object from which to copy properties.
-      */
-    assign<T, U>(target: T, source: U): T & U;
-
-    /**
-      * Copy the values of all of the enumerable own properties from one or more source objects to a
-      * target object. Returns the target object.
-      * @param target The target object to copy to.
-      * @param source1 The first source object from which to copy properties.
-      * @param source2 The second source object from which to copy properties.
-      */
-    assign<T, U, V>(target: T, source1: U, source2: V): T & U & V;
-
-    /**
-      * Copy the values of all of the enumerable own properties from one or more source objects to a
-      * target object. Returns the target object.
-      * @param target The target object to copy to.
-      * @param source1 The first source object from which to copy properties.
-      * @param source2 The second source object from which to copy properties.
-      * @param source3 The third source object from which to copy properties.
-      */
-    assign<T, U, V, W>(target: T, source1: U, source2: V, source3: W): T & U & V & W;
-
-    /**
-      * Copy the values of all of the enumerable own properties from one or more source objects to a
-      * target object. Returns the target object.
-      * @param target The target object to copy to.
-      * @param sources One or more source objects from which to copy properties
-      */
-    assign(target: any, ...sources: any[]): any;
-
-    /**
-      * Returns an array of all symbol properties found directly on object o.
-      * @param o Object to retrieve the symbols from.
-      */
-    getOwnPropertySymbols(o: any): symbol[];
-
-    /**
-      * Returns true if the values are the same value, false otherwise.
-      * @param value1 The first value.
-      * @param value2 The second value.
-      */
-    is(value1: any, value2: any): boolean;
-
-    /**
-      * Sets the prototype of a specified object o to  object proto or null. Returns the object o.
-      * @param o The object to change its prototype.
-      * @param proto The value of the new prototype or null.
-      */
-    setPrototypeOf(o: any, proto: any): any;
-
-    /**
-      * Gets the own property descriptor of the specified object.
-      * An own property descriptor is one that is defined directly on the object and is not
-      * inherited from the object's prototype.
-      * @param o Object that contains the property.
-      * @param p Name of the property.
-    */
-    getOwnPropertyDescriptor(o: any, propertyKey: PropertyKey): PropertyDescriptor;
-
-    /**
-      * Adds a property to an object, or modifies attributes of an existing property.
-      * @param o Object on which to add or modify the property. This can be a native JavaScript
-      * object (that is, a user-defined object or a built in object) or a DOM object.
-      * @param p The property name.
-      * @param attributes Descriptor for the property. It can be for a data property or an accessor
-      *  property.
-      */
-    defineProperty(o: any, propertyKey: PropertyKey, attributes: PropertyDescriptor): any;
-}
-
-interface ReadonlyArray<T> {
-  /**
-    * Returns the value of the first element in the array where predicate is true, and undefined
-    * otherwise.
-    * @param predicate find calls predicate once for each element of the array, in ascending
-    * order, until it finds one where predicate returns true. If such an element is found, find
-    * immediately returns that element value. Otherwise, find returns undefined.
-    * @param thisArg If provided, it will be used as the this value for each invocation of
-    * predicate. If it is not provided, undefined is used instead.
-    */
-  find(predicate: (value: T, index: number, obj: ReadonlyArray<T>) => boolean, thisArg?: any): T | undefined;
-
-  /**
-    * Returns the index of the first element in the array where predicate is true, and -1
-    * otherwise.
-    * @param predicate find calls predicate once for each element of the array, in ascending
-    * order, until it finds one where predicate returns true. If such an element is found,
-    * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
-    * @param thisArg If provided, it will be used as the this value for each invocation of
-    * predicate. If it is not provided, undefined is used instead.
-    */
-  findIndex(predicate: (value: T, index: number, obj: Array<T>) => boolean, thisArg?: any): number;
-}
-
-interface RegExp {
-    /**
-      * Returns a string indicating the flags of the regular expression in question. This field is read-only.
-      * The characters in this string are sequenced and concatenated in the following order:
-      *
-      *    - "g" for global
-      *    - "i" for ignoreCase
-      *    - "m" for multiline
-      *    - "u" for unicode
-      *    - "y" for sticky
-      *
-      * If no flags are set, the value is the empty string.
-      */
-    readonly flags: string;
-
-    /**
-      * Returns a Boolean value indicating the state of the sticky flag (y) used with a regular
-      * expression. Default is false. Read-only.
-      */
-    readonly sticky: boolean;
-
-    /**
-      * Returns a Boolean value indicating the state of the Unicode flag (u) used with a regular
-      * expression. Default is false. Read-only.
-      */
-    readonly unicode: boolean;
-}
-
-interface RegExpConstructor {
-    new (pattern: RegExp, flags?: string): RegExp;
-    (pattern: RegExp, flags?: string): RegExp;
-}
-
-interface String {
-    /**
-      * Returns a nonnegative integer Number less than 1114112 (0x110000) that is the code point
-      * value of the UTF-16 encoded code point starting at the string element at position pos in
-      * the String resulting from converting this object to a String.
-      * If there is no element at that position, the result is undefined.
-      * If a valid UTF-16 surrogate pair does not begin at pos, the result is the code unit at pos.
-      */
-    codePointAt(pos: number): number | undefined;
-
-    /**
-      * Returns true if searchString appears as a substring of the result of converting this
-      * object to a String, at one or more positions that are
-      * greater than or equal to position; otherwise, returns false.
-      * @param searchString search string
-      * @param position If position is undefined, 0 is assumed, so as to search all of the String.
-      */
-    includes(searchString: string, position?: number): boolean;
-
-    /**
-      * Returns true if the sequence of elements of searchString converted to a String is the
-      * same as the corresponding elements of this object (converted to a String) starting at
-      * endPosition – length(this). Otherwise returns false.
-      */
-    endsWith(searchString: string, endPosition?: number): boolean;
-
-    /**
-      * Returns the String value result of normalizing the string into the normalization form
-      * named by form as specified in Unicode Standard Annex #15, Unicode Normalization Forms.
-      * @param form Applicable values: "NFC", "NFD", "NFKC", or "NFKD", If not specified default
-      * is "NFC"
-      */
-    normalize(form: "NFC" | "NFD" | "NFKC" | "NFKD"): string;
-
-    /**
-      * Returns the String value result of normalizing the string into the normalization form
-      * named by form as specified in Unicode Standard Annex #15, Unicode Normalization Forms.
-      * @param form Applicable values: "NFC", "NFD", "NFKC", or "NFKD", If not specified default
-      * is "NFC"
-      */
-    normalize(form?: string): string;
-
-    /**
-      * Returns a String value that is made from count copies appended together. If count is 0,
-      * T is the empty String is returned.
-      * @param count number of copies to append
-      */
-    repeat(count: number): string;
-
-    /**
-      * Returns true if the sequence of elements of searchString converted to a String is the
-      * same as the corresponding elements of this object (converted to a String) starting at
-      * position. Otherwise returns false.
-      */
-    startsWith(searchString: string, position?: number): boolean;
-
-    /**
-      * Returns an <a> HTML anchor element and sets the name attribute to the text value
-      * @param name
-      */
-    anchor(name: string): string;
-
-    /** Returns a <big> HTML element */
-    big(): string;
-
-    /** Returns a <blink> HTML element */
-    blink(): string;
-
-    /** Returns a <b> HTML element */
-    bold(): string;
-
-    /** Returns a <tt> HTML element */
-    fixed(): string
-
-    /** Returns a <font> HTML element and sets the color attribute value */
-    fontcolor(color: string): string
-
-    /** Returns a <font> HTML element and sets the size attribute value */
-    fontsize(size: number): string;
-
-    /** Returns a <font> HTML element and sets the size attribute value */
-    fontsize(size: string): string;
-
-    /** Returns an <i> HTML element */
-    italics(): string;
-
-    /** Returns an <a> HTML element and sets the href attribute value */
-    link(url: string): string;
-
-    /** Returns a <small> HTML element */
-    small(): string;
-
-    /** Returns a <strike> HTML element */
-    strike(): string;
-
-    /** Returns a <sub> HTML element */
-    sub(): string;
-
-    /** Returns a <sup> HTML element */
-    sup(): string;
-}
-
-interface StringConstructor {
-    /**
-      * Return the String value whose elements are, in order, the elements in the List elements.
-      * If length is 0, the empty string is returned.
-      */
-    fromCodePoint(...codePoints: number[]): string;
-
-    /**
-      * String.raw is intended for use as a tag function of a Tagged Template String. When called
-      * as such the first argument will be a well formed template call site object and the rest
-      * parameter will contain the substitution values.
-      * @param template A well-formed template string call site representation.
-      * @param substitutions A set of substitution values.
-      */
-    raw(template: TemplateStringsArray, ...substitutions: any[]): string;
-}
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved. 
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0  
+ 
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
+MERCHANTABLITY OR NON-INFRINGEMENT. 
+ 
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+
+
+
+/// <reference no-default-lib="true"/>
+
+
+declare type PropertyKey = string | number | symbol;
+
+interface Array<T> {
+    /**
+     * Returns the value of the first element in the array where predicate is true, and undefined
+     * otherwise.
+     * @param predicate find calls predicate once for each element of the array, in ascending
+     * order, until it finds one where predicate returns true. If such an element is found, find
+     * immediately returns that element value. Otherwise, find returns undefined.
+     * @param thisArg If provided, it will be used as the this value for each invocation of
+     * predicate. If it is not provided, undefined is used instead.
+     */
+    find(predicate: (this: void, value: T, index: number, obj: Array<T>) => boolean): T | undefined;
+    find(predicate: (this: void, value: T, index: number, obj: Array<T>) => boolean, thisArg: undefined): T | undefined;
+    find<Z>(predicate: (this: Z, value: T, index: number, obj: Array<T>) => boolean, thisArg: Z): T | undefined;
+
+    /**
+     * Returns the index of the first element in the array where predicate is true, and -1
+     * otherwise.
+     * @param predicate find calls predicate once for each element of the array, in ascending
+     * order, until it finds one where predicate returns true. If such an element is found,
+     * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
+     * @param thisArg If provided, it will be used as the this value for each invocation of
+     * predicate. If it is not provided, undefined is used instead.
+     */
+    findIndex(predicate: (this: void, value: T, index: number, obj: Array<T>) => boolean): number;
+    findIndex(predicate: (this: void, value: T, index: number, obj: Array<T>) => boolean, thisArg: undefined): number;
+    findIndex<Z>(predicate: (this: Z, value: T, index: number, obj: Array<T>) => boolean, thisArg: Z): number;
+
+    /**
+     * Returns the this object after filling the section identified by start and end with value
+     * @param value value to fill array section with
+     * @param start index to start filling the array at. If start is negative, it is treated as
+     * length+start where length is the length of the array.
+     * @param end index to stop filling the array at. If end is negative, it is treated as
+     * length+end.
+     */
+    fill(value: T, start?: number, end?: number): this;
+
+    /**
+     * Returns the this object after copying a section of the array identified by start and end
+     * to the same array starting at position target
+     * @param target If target is negative, it is treated as length+target where length is the
+     * length of the array.
+     * @param start If start is negative, it is treated as length+start. If end is negative, it
+     * is treated as length+end.
+     * @param end If not specified, length of the this object is used as its default value.
+     */
+    copyWithin(target: number, start: number, end?: number): this;
+}
+
+interface ArrayConstructor {
+    /**
+     * Creates an array from an array-like object.
+     * @param arrayLike An array-like object to convert to an array.
+     * @param mapfn A mapping function to call on every element of the array.
+     * @param thisArg Value of 'this' used to invoke the mapfn.
+     */
+    from<T, U>(arrayLike: ArrayLike<T>, mapfn: (this: void, v: T, k: number) => U): Array<U>;
+    from<T, U>(arrayLike: ArrayLike<T>, mapfn: (this: void, v: T, k: number) => U, thisArg: undefined): Array<U>;
+    from<Z, T, U>(arrayLike: ArrayLike<T>, mapfn: (this: Z, v: T, k: number) => U, thisArg: Z): Array<U>;
+
+
+    /**
+     * Creates an array from an array-like object.
+     * @param arrayLike An array-like object to convert to an array.
+     */
+    from<T>(arrayLike: ArrayLike<T>): Array<T>;
+
+    /**
+     * Returns a new array from a set of elements.
+     * @param items A set of elements to include in the new array object.
+     */
+    of<T>(...items: T[]): Array<T>;
+}
+
+interface DateConstructor {
+    new (value: Date): Date;
+}
+
+interface Function {
+    /**
+     * Returns the name of the function. Function names are read-only and can not be changed.
+     */
+    readonly name: string;
+}
+
+interface Math {
+    /**
+     * Returns the number of leading zero bits in the 32-bit binary representation of a number.
+     * @param x A numeric expression.
+     */
+    clz32(x: number): number;
+
+    /**
+     * Returns the result of 32-bit multiplication of two numbers.
+     * @param x First number
+     * @param y Second number
+     */
+    imul(x: number, y: number): number;
+
+    /**
+     * Returns the sign of the x, indicating whether x is positive, negative or zero.
+     * @param x The numeric expression to test
+     */
+    sign(x: number): number;
+
+    /**
+     * Returns the base 10 logarithm of a number.
+     * @param x A numeric expression.
+     */
+    log10(x: number): number;
+
+    /**
+     * Returns the base 2 logarithm of a number.
+     * @param x A numeric expression.
+     */
+    log2(x: number): number;
+
+    /**
+     * Returns the natural logarithm of 1 + x.
+     * @param x A numeric expression.
+     */
+    log1p(x: number): number;
+
+    /**
+     * Returns the result of (e^x - 1) of x (e raised to the power of x, where e is the base of
+     * the natural logarithms).
+     * @param x A numeric expression.
+     */
+    expm1(x: number): number;
+
+    /**
+     * Returns the hyperbolic cosine of a number.
+     * @param x A numeric expression that contains an angle measured in radians.
+     */
+    cosh(x: number): number;
+
+    /**
+     * Returns the hyperbolic sine of a number.
+     * @param x A numeric expression that contains an angle measured in radians.
+     */
+    sinh(x: number): number;
+
+    /**
+     * Returns the hyperbolic tangent of a number.
+     * @param x A numeric expression that contains an angle measured in radians.
+     */
+    tanh(x: number): number;
+
+    /**
+     * Returns the inverse hyperbolic cosine of a number.
+     * @param x A numeric expression that contains an angle measured in radians.
+     */
+    acosh(x: number): number;
+
+    /**
+     * Returns the inverse hyperbolic sine of a number.
+     * @param x A numeric expression that contains an angle measured in radians.
+     */
+    asinh(x: number): number;
+
+    /**
+     * Returns the inverse hyperbolic tangent of a number.
+     * @param x A numeric expression that contains an angle measured in radians.
+     */
+    atanh(x: number): number;
+
+    /**
+     * Returns the square root of the sum of squares of its arguments.
+     * @param values Values to compute the square root for.
+     *     If no arguments are passed, the result is +0.
+     *     If there is only one argument, the result is the absolute value.
+     *     If any argument is +Infinity or -Infinity, the result is +Infinity.
+     *     If any argument is NaN, the result is NaN.
+     *     If all arguments are either +0 or −0, the result is +0.
+     */
+    hypot(...values: number[] ): number;
+
+    /**
+     * Returns the integral part of the a numeric expression, x, removing any fractional digits.
+     * If x is already an integer, the result is x.
+     * @param x A numeric expression.
+     */
+    trunc(x: number): number;
+
+    /**
+     * Returns the nearest single precision float representation of a number.
+     * @param x A numeric expression.
+     */
+    fround(x: number): number;
+
+    /**
+     * Returns an implementation-dependent approximation to the cube root of number.
+     * @param x A numeric expression.
+     */
+    cbrt(x: number): number;
+}
+
+interface NumberConstructor {
+    /**
+     * The value of Number.EPSILON is the difference between 1 and the smallest value greater than 1
+     * that is representable as a Number value, which is approximately:
+     * 2.2204460492503130808472633361816 x 10‍−‍16.
+     */
+    readonly EPSILON: number;
+
+    /**
+     * Returns true if passed value is finite.
+     * Unlike the global isFinite, Number.isFinite doesn't forcibly convert the parameter to a
+     * number. Only finite values of the type number, result in true.
+     * @param number A numeric value.
+     */
+    isFinite(number: number): boolean;
+
+    /**
+     * Returns true if the value passed is an integer, false otherwise.
+     * @param number A numeric value.
+     */
+    isInteger(number: number): boolean;
+
+    /**
+     * Returns a Boolean value that indicates whether a value is the reserved value NaN (not a
+     * number). Unlike the global isNaN(), Number.isNaN() doesn't forcefully convert the parameter
+     * to a number. Only values of the type number, that are also NaN, result in true.
+     * @param number A numeric value.
+     */
+    isNaN(number: number): boolean;
+
+    /**
+     * Returns true if the value passed is a safe integer.
+     * @param number A numeric value.
+     */
+    isSafeInteger(number: number): boolean;
+
+    /**
+     * The value of the largest integer n such that n and n + 1 are both exactly representable as
+     * a Number value.
+     * The value of Number.MAX_SAFE_INTEGER is 9007199254740991 2^53 − 1.
+     */
+    readonly MAX_SAFE_INTEGER: number;
+
+    /**
+     * The value of the smallest integer n such that n and n − 1 are both exactly representable as
+     * a Number value.
+     * The value of Number.MIN_SAFE_INTEGER is −9007199254740991 (−(2^53 − 1)).
+     */
+    readonly MIN_SAFE_INTEGER: number;
+
+    /**
+     * Converts a string to a floating-point number.
+     * @param string A string that contains a floating-point number.
+     */
+    parseFloat(string: string): number;
+
+    /**
+     * Converts A string to an integer.
+     * @param s A string to convert into a number.
+     * @param radix A value between 2 and 36 that specifies the base of the number in numString.
+     * If this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.
+     * All other strings are considered decimal.
+     */
+    parseInt(string: string, radix?: number): number;
+}
+
+interface Object {
+    /**
+     * Determines whether an object has a property with the specified name.
+     * @param v A property name.
+     */
+    hasOwnProperty(v: PropertyKey): boolean;
+
+    /**
+     * Determines whether a specified property is enumerable.
+     * @param v A property name.
+     */
+    propertyIsEnumerable(v: PropertyKey): boolean;
+}
+
+interface ObjectConstructor {
+    /**
+     * Copy the values of all of the enumerable own properties from one or more source objects to a
+     * target object. Returns the target object.
+     * @param target The target object to copy to.
+     * @param source The source object from which to copy properties.
+     */
+    assign<T, U>(target: T, source: U): T & U;
+
+    /**
+     * Copy the values of all of the enumerable own properties from one or more source objects to a
+     * target object. Returns the target object.
+     * @param target The target object to copy to.
+     * @param source1 The first source object from which to copy properties.
+     * @param source2 The second source object from which to copy properties.
+     */
+    assign<T, U, V>(target: T, source1: U, source2: V): T & U & V;
+
+    /**
+     * Copy the values of all of the enumerable own properties from one or more source objects to a
+     * target object. Returns the target object.
+     * @param target The target object to copy to.
+     * @param source1 The first source object from which to copy properties.
+     * @param source2 The second source object from which to copy properties.
+     * @param source3 The third source object from which to copy properties.
+     */
+    assign<T, U, V, W>(target: T, source1: U, source2: V, source3: W): T & U & V & W;
+
+    /**
+     * Copy the values of all of the enumerable own properties from one or more source objects to a
+     * target object. Returns the target object.
+     * @param target The target object to copy to.
+     * @param sources One or more source objects from which to copy properties
+     */
+    assign(target: object, ...sources: any[]): any;
+
+    /**
+     * Returns an array of all symbol properties found directly on object o.
+     * @param o Object to retrieve the symbols from.
+     */
+    getOwnPropertySymbols(o: any): symbol[];
+
+    /**
+     * Returns true if the values are the same value, false otherwise.
+     * @param value1 The first value.
+     * @param value2 The second value.
+     */
+    is(value1: any, value2: any): boolean;
+
+    /**
+     * Sets the prototype of a specified object o to  object proto or null. Returns the object o.
+     * @param o The object to change its prototype.
+     * @param proto The value of the new prototype or null.
+     */
+    setPrototypeOf(o: any, proto: object | null): any;
+
+    /**
+     * Gets the own property descriptor of the specified object.
+     * An own property descriptor is one that is defined directly on the object and is not
+     * inherited from the object's prototype.
+     * @param o Object that contains the property.
+     * @param p Name of the property.
+     */
+    getOwnPropertyDescriptor(o: any, propertyKey: PropertyKey): PropertyDescriptor;
+
+    /**
+     * Adds a property to an object, or modifies attributes of an existing property.
+     * @param o Object on which to add or modify the property. This can be a native JavaScript
+     * object (that is, a user-defined object or a built in object) or a DOM object.
+     * @param p The property name.
+     * @param attributes Descriptor for the property. It can be for a data property or an accessor
+     *  property.
+     */
+    defineProperty(o: any, propertyKey: PropertyKey, attributes: PropertyDescriptor): any;
+}
+
+interface ReadonlyArray<T> {
+    /**
+     * Returns the value of the first element in the array where predicate is true, and undefined
+     * otherwise.
+     * @param predicate find calls predicate once for each element of the array, in ascending
+     * order, until it finds one where predicate returns true. If such an element is found, find
+     * immediately returns that element value. Otherwise, find returns undefined.
+     * @param thisArg If provided, it will be used as the this value for each invocation of
+     * predicate. If it is not provided, undefined is used instead.
+     */
+    find(predicate: (this: void, value: T, index: number, obj: ReadonlyArray<T>) => boolean): T | undefined;
+    find(predicate: (this: void, value: T, index: number, obj: ReadonlyArray<T>) => boolean, thisArg: undefined): T | undefined;
+    find<Z>(predicate: (this: Z, value: T, index: number, obj: ReadonlyArray<T>) => boolean, thisArg: Z): T | undefined;
+
+    /**
+     * Returns the index of the first element in the array where predicate is true, and -1
+     * otherwise.
+     * @param predicate find calls predicate once for each element of the array, in ascending
+     * order, until it finds one where predicate returns true. If such an element is found,
+     * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
+     * @param thisArg If provided, it will be used as the this value for each invocation of
+     * predicate. If it is not provided, undefined is used instead.
+     */
+    findIndex(predicate: (this: void, value: T, index: number, obj: Array<T>) => boolean): number;
+    findIndex(predicate: (this: void, value: T, index: number, obj: Array<T>) => boolean, thisArg: undefined): number;
+    findIndex<Z>(predicate: (this: Z, value: T, index: number, obj: Array<T>) => boolean, thisArg: Z): number;
+}
+
+interface RegExp {
+    /**
+     * Returns a string indicating the flags of the regular expression in question. This field is read-only.
+     * The characters in this string are sequenced and concatenated in the following order:
+     *
+     *    - "g" for global
+     *    - "i" for ignoreCase
+     *    - "m" for multiline
+     *    - "u" for unicode
+     *    - "y" for sticky
+     *
+     * If no flags are set, the value is the empty string.
+     */
+    readonly flags: string;
+
+    /**
+     * Returns a Boolean value indicating the state of the sticky flag (y) used with a regular
+     * expression. Default is false. Read-only.
+     */
+    readonly sticky: boolean;
+
+    /**
+     * Returns a Boolean value indicating the state of the Unicode flag (u) used with a regular
+     * expression. Default is false. Read-only.
+     */
+    readonly unicode: boolean;
+}
+
+interface RegExpConstructor {
+    new (pattern: RegExp, flags?: string): RegExp;
+    (pattern: RegExp, flags?: string): RegExp;
+}
+
+interface String {
+    /**
+     * Returns a nonnegative integer Number less than 1114112 (0x110000) that is the code point
+     * value of the UTF-16 encoded code point starting at the string element at position pos in
+     * the String resulting from converting this object to a String.
+     * If there is no element at that position, the result is undefined.
+     * If a valid UTF-16 surrogate pair does not begin at pos, the result is the code unit at pos.
+     */
+    codePointAt(pos: number): number | undefined;
+
+    /**
+     * Returns true if searchString appears as a substring of the result of converting this
+     * object to a String, at one or more positions that are
+     * greater than or equal to position; otherwise, returns false.
+     * @param searchString search string
+     * @param position If position is undefined, 0 is assumed, so as to search all of the String.
+     */
+    includes(searchString: string, position?: number): boolean;
+
+    /**
+     * Returns true if the sequence of elements of searchString converted to a String is the
+     * same as the corresponding elements of this object (converted to a String) starting at
+     * endPosition – length(this). Otherwise returns false.
+     */
+    endsWith(searchString: string, endPosition?: number): boolean;
+
+    /**
+     * Returns the String value result of normalizing the string into the normalization form
+     * named by form as specified in Unicode Standard Annex #15, Unicode Normalization Forms.
+     * @param form Applicable values: "NFC", "NFD", "NFKC", or "NFKD", If not specified default
+     * is "NFC"
+     */
+    normalize(form: "NFC" | "NFD" | "NFKC" | "NFKD"): string;
+
+    /**
+     * Returns the String value result of normalizing the string into the normalization form
+     * named by form as specified in Unicode Standard Annex #15, Unicode Normalization Forms.
+     * @param form Applicable values: "NFC", "NFD", "NFKC", or "NFKD", If not specified default
+     * is "NFC"
+     */
+    normalize(form?: string): string;
+
+    /**
+     * Returns a String value that is made from count copies appended together. If count is 0,
+     * T is the empty String is returned.
+     * @param count number of copies to append
+     */
+    repeat(count: number): string;
+
+    /**
+     * Returns true if the sequence of elements of searchString converted to a String is the
+     * same as the corresponding elements of this object (converted to a String) starting at
+     * position. Otherwise returns false.
+     */
+    startsWith(searchString: string, position?: number): boolean;
+
+    /**
+     * Returns an <a> HTML anchor element and sets the name attribute to the text value
+     * @param name
+     */
+    anchor(name: string): string;
+
+    /** Returns a <big> HTML element */
+    big(): string;
+
+    /** Returns a <blink> HTML element */
+    blink(): string;
+
+    /** Returns a <b> HTML element */
+    bold(): string;
+
+    /** Returns a <tt> HTML element */
+    fixed(): string;
+
+    /** Returns a <font> HTML element and sets the color attribute value */
+    fontcolor(color: string): string;
+
+    /** Returns a <font> HTML element and sets the size attribute value */
+    fontsize(size: number): string;
+
+    /** Returns a <font> HTML element and sets the size attribute value */
+    fontsize(size: string): string;
+
+    /** Returns an <i> HTML element */
+    italics(): string;
+
+    /** Returns an <a> HTML element and sets the href attribute value */
+    link(url: string): string;
+
+    /** Returns a <small> HTML element */
+    small(): string;
+
+    /** Returns a <strike> HTML element */
+    strike(): string;
+
+    /** Returns a <sub> HTML element */
+    sub(): string;
+
+    /** Returns a <sup> HTML element */
+    sup(): string;
+}
+
+interface StringConstructor {
+    /**
+     * Return the String value whose elements are, in order, the elements in the List elements.
+     * If length is 0, the empty string is returned.
+     */
+    fromCodePoint(...codePoints: number[]): string;
+
+    /**
+     * String.raw is intended for use as a tag function of a Tagged Template String. When called
+     * as such the first argument will be a well formed template call site object and the rest
+     * parameter will contain the substitution values.
+     * @param template A well-formed template string call site representation.
+     * @param substitutions A set of substitution values.
+     */
+    raw(template: TemplateStringsArray, ...substitutions: any[]): string;
+}
diff --git a/bin/lib.es2015.d.ts b/bin/lib.es2015.d.ts
index 973d518..a536e9c 100644
--- a/bin/lib.es2015.d.ts
+++ b/bin/lib.es2015.d.ts
@@ -1,26 +1,30 @@
-/*! *****************************************************************************
-Copyright (c) Microsoft Corporation. All rights reserved. 
-Licensed under the Apache License, Version 2.0 (the "License"); you may not use
-this file except in compliance with the License. You may obtain a copy of the
-License at http://www.apache.org/licenses/LICENSE-2.0  
- 
-THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
-WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
-MERCHANTABLITY OR NON-INFRINGEMENT. 
- 
-See the Apache Version 2.0 License for specific language governing permissions
-and limitations under the License.
-***************************************************************************** */
-
-/// <reference no-default-lib="true"/>
-/// <reference path="lib.es2015.core.d.ts" />
-/// <reference path="lib.es2015.collection.d.ts" />
-/// <reference path="lib.es2015.generator.d.ts" />
-/// <reference path="lib.es2015.iterable.d.ts" />
-/// <reference path="lib.es2015.promise.d.ts" />
-/// <reference path="lib.es2015.proxy.d.ts" />
-/// <reference path="lib.es2015.reflect.d.ts" />
-/// <reference path="lib.es2015.symbol.d.ts" />
-/// <reference path="lib.es2015.symbol.wellknown.d.ts" />
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved. 
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0  
+ 
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
+MERCHANTABLITY OR NON-INFRINGEMENT. 
+ 
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+
+
+
+/// <reference no-default-lib="true"/>
+
+
+/// <reference path="lib.es2015.core.d.ts" />
+/// <reference path="lib.es2015.collection.d.ts" />
+/// <reference path="lib.es2015.generator.d.ts" />
+/// <reference path="lib.es2015.iterable.d.ts" />
+/// <reference path="lib.es2015.promise.d.ts" />
+/// <reference path="lib.es2015.proxy.d.ts" />
+/// <reference path="lib.es2015.reflect.d.ts" />
+/// <reference path="lib.es2015.symbol.d.ts" />
+/// <reference path="lib.es2015.symbol.wellknown.d.ts" />
 /// <reference path="lib.es5.d.ts" />
\ No newline at end of file
diff --git a/bin/lib.es2015.generator.d.ts b/bin/lib.es2015.generator.d.ts
index 003f325..d331a58 100644
--- a/bin/lib.es2015.generator.d.ts
+++ b/bin/lib.es2015.generator.d.ts
@@ -1,28 +1,72 @@
-/*! *****************************************************************************
-Copyright (c) Microsoft Corporation. All rights reserved. 
-Licensed under the Apache License, Version 2.0 (the "License"); you may not use
-this file except in compliance with the License. You may obtain a copy of the
-License at http://www.apache.org/licenses/LICENSE-2.0  
- 
-THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
-WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
-MERCHANTABLITY OR NON-INFRINGEMENT. 
- 
-See the Apache Version 2.0 License for specific language governing permissions
-and limitations under the License.
-***************************************************************************** */
-
-/// <reference no-default-lib="true"/>
-interface GeneratorFunction extends Function { }
-
-interface GeneratorFunctionConstructor {
-    /**
-      * Creates a new Generator function.
-      * @param args A list of arguments the function accepts.
-      */
-    new (...args: string[]): GeneratorFunction;
-    (...args: string[]): GeneratorFunction;
-    readonly prototype: GeneratorFunction;
-}
-declare var GeneratorFunction: GeneratorFunctionConstructor;
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved. 
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0  
+ 
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
+MERCHANTABLITY OR NON-INFRINGEMENT. 
+ 
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+
+
+
+/// <reference no-default-lib="true"/>
+
+
+interface Generator extends Iterator<any> { }
+
+interface GeneratorFunction {
+    /**
+     * Creates a new Generator object.
+     * @param args A list of arguments the function accepts.
+     */
+    new (...args: any[]): Generator;
+    /**
+     * Creates a new Generator object.
+     * @param args A list of arguments the function accepts.
+     */
+    (...args: any[]): Generator;
+    /**
+     * The length of the arguments.
+     */
+    readonly length: number;
+    /**
+     * Returns the name of the function.
+     */
+    readonly name: string;
+    /**
+     * A reference to the prototype.
+     */
+    readonly prototype: Generator;
+}
+
+interface GeneratorFunctionConstructor {
+    /**
+     * Creates a new Generator function.
+     * @param args A list of arguments the function accepts.
+     */
+    new (...args: string[]): GeneratorFunction;
+    /**
+     * Creates a new Generator function.
+     * @param args A list of arguments the function accepts.
+     */
+    (...args: string[]): GeneratorFunction;
+    /**
+     * The length of the arguments.
+     */
+    readonly length: number;
+    /**
+     * Returns the name of the function.
+     */
+    readonly name: string;
+    /**
+     * A reference to the prototype.
+     */
+    readonly prototype: GeneratorFunction;
+}
+declare var GeneratorFunction: GeneratorFunctionConstructor;
diff --git a/bin/lib.es2015.iterable.d.ts b/bin/lib.es2015.iterable.d.ts
index 1c27525..5516986 100644
--- a/bin/lib.es2015.iterable.d.ts
+++ b/bin/lib.es2015.iterable.d.ts
@@ -1,461 +1,567 @@
-/*! *****************************************************************************
-Copyright (c) Microsoft Corporation. All rights reserved. 
-Licensed under the Apache License, Version 2.0 (the "License"); you may not use
-this file except in compliance with the License. You may obtain a copy of the
-License at http://www.apache.org/licenses/LICENSE-2.0  
- 
-THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
-WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
-MERCHANTABLITY OR NON-INFRINGEMENT. 
- 
-See the Apache Version 2.0 License for specific language governing permissions
-and limitations under the License.
-***************************************************************************** */
-
-/// <reference no-default-lib="true"/>
-/// <reference path="lib.es2015.symbol.d.ts" />
-
-interface SymbolConstructor {
-    /** 
-      * A method that returns the default iterator for an object. Called by the semantics of the 
-      * for-of statement.
-      */
-    readonly iterator: symbol;
-}
-
-interface IteratorResult<T> {
-    done: boolean;
-    value: T;
-}
-
-interface Iterator<T> {
-    next(value?: any): IteratorResult<T>;
-    return?(value?: any): IteratorResult<T>;
-    throw?(e?: any): IteratorResult<T>;
-}
-
-interface Iterable<T> {
-    [Symbol.iterator](): Iterator<T>;
-}
-
-interface IterableIterator<T> extends Iterator<T> {
-    [Symbol.iterator](): IterableIterator<T>;
-}
-
-interface Array<T> {
-    /** Iterator */
-    [Symbol.iterator](): IterableIterator<T>;
-
-    /** 
-      * Returns an array of key, value pairs for every entry in the array
-      */
-    entries(): IterableIterator<[number, T]>;
-
-    /** 
-      * Returns an list of keys in the array
-      */
-    keys(): IterableIterator<number>;
-
-    /** 
-      * Returns an list of values in the array
-      */
-    values(): IterableIterator<T>;
-}
-
-interface ArrayConstructor {
-    /**
-      * Creates an array from an iterable object.
-      * @param iterable An iterable object to convert to an array.
-      * @param mapfn A mapping function to call on every element of the array.
-      * @param thisArg Value of 'this' used to invoke the mapfn.
-      */
-    from<T, U>(iterable: Iterable<T>, mapfn: (v: T, k: number) => U, thisArg?: any): Array<U>;
-    
-    /**
-      * Creates an array from an iterable object.
-      * @param iterable An iterable object to convert to an array.
-      */
-    from<T>(iterable: Iterable<T>): Array<T>;
-}
-
-interface ReadonlyArray<T> {
-    /** Iterator */
-    [Symbol.iterator](): IterableIterator<T>;
-
-    /** 
-      * Returns an array of key, value pairs for every entry in the array
-      */
-    entries(): IterableIterator<[number, T]>;
-
-    /** 
-      * Returns an list of keys in the array
-      */
-    keys(): IterableIterator<number>;
-
-    /** 
-      * Returns an list of values in the array
-      */
-    values(): IterableIterator<T>;
-}
-
-interface IArguments {
-    /** Iterator */
-    [Symbol.iterator](): IterableIterator<any>;
-}
-
-interface Map<K, V> {
-    [Symbol.iterator](): IterableIterator<[K,V]>;
-    entries(): IterableIterator<[K, V]>;
-    keys(): IterableIterator<K>;
-    values(): IterableIterator<V>;
-}
-
-interface MapConstructor {
-    new <K, V>(iterable: Iterable<[K, V]>): Map<K, V>;
-}
-
-interface WeakMap<K, V> { }
-
-interface WeakMapConstructor {
-    new <K, V>(iterable: Iterable<[K, V]>): WeakMap<K, V>;
-}
-
-interface Set<T> {
-    [Symbol.iterator](): IterableIterator<T>;
-    entries(): IterableIterator<[T, T]>;
-    keys(): IterableIterator<T>;
-    values(): IterableIterator<T>;
-}
-
-interface SetConstructor {
-    new <T>(iterable: Iterable<T>): Set<T>;
-}
-
-interface WeakSet<T> { }
-
-interface WeakSetConstructor {
-    new <T>(iterable: Iterable<T>): WeakSet<T>;
-}
-
-interface Promise<T> { }
-
-interface PromiseConstructor {
-    /**
-     * Creates a Promise that is resolved with an array of results when all of the provided Promises 
-     * resolve, or rejected when any Promise is rejected.
-     * @param values An array of Promises.
-     * @returns A new Promise.
-     */
-    all<TAll>(values: Iterable<TAll | PromiseLike<TAll>>): Promise<TAll[]>;
-    
-    /**
-     * Creates a Promise that is resolved or rejected when any of the provided Promises are resolved 
-     * or rejected.
-     * @param values An array of Promises.
-     * @returns A new Promise.
-     */
-    race<T>(values: Iterable<T | PromiseLike<T>>): Promise<T>;
-}
-
-declare namespace Reflect {
-    function enumerate(target: any): IterableIterator<any>;
-}
-
-interface String {
-    /** Iterator */
-    [Symbol.iterator](): IterableIterator<string>;
-}
-
-/**
-  * A typed array of 8-bit integer values. The contents are initialized to 0. If the requested 
-  * number of bytes could not be allocated an exception is raised.
-  */
-interface Int8Array {
-    [Symbol.iterator](): IterableIterator<number>;
-    /** 
-      * Returns an array of key, value pairs for every entry in the array
-      */
-    entries(): IterableIterator<[number, number]>;
-    /** 
-      * Returns an list of keys in the array
-      */
-    keys(): IterableIterator<number>;
-    /** 
-      * Returns an list of values in the array
-      */
-    values(): IterableIterator<number>;
-}
-
-interface Int8ArrayConstructor {
-    new (elements: Iterable<number>): Int8Array;
-
-    /**
-      * Creates an array from an array-like or iterable object.
-      * @param arrayLike An array-like or iterable object to convert to an array.
-      * @param mapfn A mapping function to call on every element of the array.
-      * @param thisArg Value of 'this' used to invoke the mapfn.
-      */
-    from(arrayLike: Iterable<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Int8Array;
-}
-
-/**
-  * A typed array of 8-bit unsigned integer values. The contents are initialized to 0. If the 
-  * requested number of bytes could not be allocated an exception is raised.
-  */
-interface Uint8Array {
-    [Symbol.iterator](): IterableIterator<number>;
-    /** 
-      * Returns an array of key, value pairs for every entry in the array
-      */
-    entries(): IterableIterator<[number, number]>;
-    /** 
-      * Returns an list of keys in the array
-      */
-    keys(): IterableIterator<number>;
-    /** 
-      * Returns an list of values in the array
-      */
-    values(): IterableIterator<number>;
-}
-
-interface Uint8ArrayConstructor {
-    new (elements: Iterable<number>): Uint8Array;
-
-    /**
-      * Creates an array from an array-like or iterable object.
-      * @param arrayLike An array-like or iterable object to convert to an array.
-      * @param mapfn A mapping function to call on every element of the array.
-      * @param thisArg Value of 'this' used to invoke the mapfn.
-      */
-    from(arrayLike: Iterable<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Uint8Array;
-}
-
-/**
-  * A typed array of 8-bit unsigned integer (clamped) values. The contents are initialized to 0. 
-  * If the requested number of bytes could not be allocated an exception is raised.
-  */
-interface Uint8ClampedArray {
-    [Symbol.iterator](): IterableIterator<number>;
-    /** 
-      * Returns an array of key, value pairs for every entry in the array
-      */
-    entries(): IterableIterator<[number, number]>;
-
-    /** 
-      * Returns an list of keys in the array
-      */
-    keys(): IterableIterator<number>;
-
-    /** 
-      * Returns an list of values in the array
-      */
-    values(): IterableIterator<number>;
-}
-
-interface Uint8ClampedArrayConstructor {
-    new (elements: Iterable<number>): Uint8ClampedArray;
-
-
-    /**
-      * Creates an array from an array-like or iterable object.
-      * @param arrayLike An array-like or iterable object to convert to an array.
-      * @param mapfn A mapping function to call on every element of the array.
-      * @param thisArg Value of 'this' used to invoke the mapfn.
-      */
-    from(arrayLike: Iterable<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Uint8ClampedArray;
-}
-
-/**
-  * A typed array of 16-bit signed integer values. The contents are initialized to 0. If the 
-  * requested number of bytes could not be allocated an exception is raised.
-  */
-interface Int16Array {
-    [Symbol.iterator](): IterableIterator<number>;
-    /** 
-      * Returns an array of key, value pairs for every entry in the array
-      */
-    entries(): IterableIterator<[number, number]>;
-
-    /** 
-      * Returns an list of keys in the array
-      */
-    keys(): IterableIterator<number>;
-
-    /** 
-      * Returns an list of values in the array
-      */
-    values(): IterableIterator<number>;
-}
-
-interface Int16ArrayConstructor {
-    new (elements: Iterable<number>): Int16Array;
-
-    /**
-      * Creates an array from an array-like or iterable object.
-      * @param arrayLike An array-like or iterable object to convert to an array.
-      * @param mapfn A mapping function to call on every element of the array.
-      * @param thisArg Value of 'this' used to invoke the mapfn.
-      */
-    from(arrayLike: Iterable<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Int16Array;
-}
-
-/**
-  * A typed array of 16-bit unsigned integer values. The contents are initialized to 0. If the 
-  * requested number of bytes could not be allocated an exception is raised.
-  */
-interface Uint16Array {
-    [Symbol.iterator](): IterableIterator<number>;
-    /** 
-      * Returns an array of key, value pairs for every entry in the array
-      */
-    entries(): IterableIterator<[number, number]>;
-    /** 
-      * Returns an list of keys in the array
-      */
-    keys(): IterableIterator<number>;
-    /** 
-      * Returns an list of values in the array
-      */
-    values(): IterableIterator<number>;
-}
-
-interface Uint16ArrayConstructor {
-    new (elements: Iterable<number>): Uint16Array;
-
-    /**
-      * Creates an array from an array-like or iterable object.
-      * @param arrayLike An array-like or iterable object to convert to an array.
-      * @param mapfn A mapping function to call on every element of the array.
-      * @param thisArg Value of 'this' used to invoke the mapfn.
-      */
-    from(arrayLike: Iterable<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Uint16Array;
-}
-
-/**
-  * A typed array of 32-bit signed integer values. The contents are initialized to 0. If the 
-  * requested number of bytes could not be allocated an exception is raised.
-  */
-interface Int32Array {
-    [Symbol.iterator](): IterableIterator<number>;
-    /** 
-      * Returns an array of key, value pairs for every entry in the array
-      */
-    entries(): IterableIterator<[number, number]>;
-    /** 
-      * Returns an list of keys in the array
-      */
-    keys(): IterableIterator<number>;
-    /** 
-      * Returns an list of values in the array
-      */
-    values(): IterableIterator<number>;
-}
-
-interface Int32ArrayConstructor {
-    new (elements: Iterable<number>): Int32Array;
-
-    /**
-      * Creates an array from an array-like or iterable object.
-      * @param arrayLike An array-like or iterable object to convert to an array.
-      * @param mapfn A mapping function to call on every element of the array.
-      * @param thisArg Value of 'this' used to invoke the mapfn.
-      */
-    from(arrayLike: Iterable<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Int32Array;
-}
-
-/**
-  * A typed array of 32-bit unsigned integer values. The contents are initialized to 0. If the 
-  * requested number of bytes could not be allocated an exception is raised.
-  */
-interface Uint32Array {
-    [Symbol.iterator](): IterableIterator<number>;
-    /** 
-      * Returns an array of key, value pairs for every entry in the array
-      */
-    entries(): IterableIterator<[number, number]>;
-    /** 
-      * Returns an list of keys in the array
-      */
-    keys(): IterableIterator<number>;
-    /** 
-      * Returns an list of values in the array
-      */
-    values(): IterableIterator<number>;
-}
-
-interface Uint32ArrayConstructor {
-    new (elements: Iterable<number>): Uint32Array;
-
-    /**
-      * Creates an array from an array-like or iterable object.
-      * @param arrayLike An array-like or iterable object to convert to an array.
-      * @param mapfn A mapping function to call on every element of the array.
-      * @param thisArg Value of 'this' used to invoke the mapfn.
-      */
-    from(arrayLike: Iterable<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Uint32Array;
-}
-
-/**
-  * A typed array of 32-bit float values. The contents are initialized to 0. If the requested number
-  * of bytes could not be allocated an exception is raised.
-  */
-interface Float32Array {
-    [Symbol.iterator](): IterableIterator<number>;
-    /** 
-      * Returns an array of key, value pairs for every entry in the array
-      */
-    entries(): IterableIterator<[number, number]>;
-    /** 
-      * Returns an list of keys in the array
-      */
-    keys(): IterableIterator<number>;
-    /** 
-      * Returns an list of values in the array
-      */
-    values(): IterableIterator<number>;
-}
-
-interface Float32ArrayConstructor {
-    new (elements: Iterable<number>): Float32Array;
-
-    /**
-      * Creates an array from an array-like or iterable object.
-      * @param arrayLike An array-like or iterable object to convert to an array.
-      * @param mapfn A mapping function to call on every element of the array.
-      * @param thisArg Value of 'this' used to invoke the mapfn.
-      */
-    from(arrayLike: Iterable<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Float32Array;
-}
-
-/**
-  * A typed array of 64-bit float values. The contents are initialized to 0. If the requested 
-  * number of bytes could not be allocated an exception is raised.
-  */
-interface Float64Array {
-    [Symbol.iterator](): IterableIterator<number>;
-    /** 
-      * Returns an array of key, value pairs for every entry in the array
-      */
-    entries(): IterableIterator<[number, number]>;
-    /** 
-      * Returns an list of keys in the array
-      */
-    keys(): IterableIterator<number>;
-    /** 
-      * Returns an list of values in the array
-      */
-    values(): IterableIterator<number>;
-}
-
-interface Float64ArrayConstructor {
-    new (elements: Iterable<number>): Float64Array;
-
-    /**
-      * Creates an array from an array-like or iterable object.
-      * @param arrayLike An array-like or iterable object to convert to an array.
-      * @param mapfn A mapping function to call on every element of the array.
-      * @param thisArg Value of 'this' used to invoke the mapfn.
-      */
-    from(arrayLike: Iterable<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Float64Array;
-}
\ No newline at end of file
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved. 
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0  
+ 
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
+MERCHANTABLITY OR NON-INFRINGEMENT. 
+ 
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+
+
+
+/// <reference no-default-lib="true"/>
+
+
+/// <reference path="lib.es2015.symbol.d.ts" />
+
+interface SymbolConstructor {
+    /**
+     * A method that returns the default iterator for an object. Called by the semantics of the
+     * for-of statement.
+     */
+    readonly iterator: symbol;
+}
+
+interface IteratorResult<T> {
+    done: boolean;
+    value: T;
+}
+
+interface Iterator<T> {
+    next(value?: any): IteratorResult<T>;
+    return?(value?: any): IteratorResult<T>;
+    throw?(e?: any): IteratorResult<T>;
+}
+
+interface Iterable<T> {
+    [Symbol.iterator](): Iterator<T>;
+}
+
+interface IterableIterator<T> extends Iterator<T> {
+    [Symbol.iterator](): IterableIterator<T>;
+}
+
+interface Array<T> {
+    /** Iterator */
+    [Symbol.iterator](): IterableIterator<T>;
+
+    /**
+     * Returns an iterable of key, value pairs for every entry in the array
+     */
+    entries(): IterableIterator<[number, T]>;
+
+    /**
+     * Returns an iterable of keys in the array
+     */
+    keys(): IterableIterator<number>;
+
+    /**
+     * Returns an iterable of values in the array
+     */
+    values(): IterableIterator<T>;
+}
+
+interface ArrayConstructor {
+    /**
+     * Creates an array from an iterable object.
+     * @param iterable An iterable object to convert to an array.
+     * @param mapfn A mapping function to call on every element of the array.
+     * @param thisArg Value of 'this' used to invoke the mapfn.
+     */
+    from<T, U>(iterable: Iterable<T>, mapfn: (this: void, v: T, k: number) => U): Array<U>;
+    from<T, U>(iterable: Iterable<T>, mapfn: (this: void, v: T, k: number) => U, thisArg: undefined): Array<U>;
+    from<Z, T, U>(iterable: Iterable<T>, mapfn: (this: Z, v: T, k: number) => U, thisArg: Z): Array<U>;
+
+    /**
+     * Creates an array from an iterable object.
+     * @param iterable An iterable object to convert to an array.
+     */
+    from<T>(iterable: Iterable<T>): Array<T>;
+}
+
+interface ReadonlyArray<T> {
+    /** Iterator of values in the array. */
+    [Symbol.iterator](): IterableIterator<T>;
+
+    /**
+     * Returns an iterable of key, value pairs for every entry in the array
+     */
+    entries(): IterableIterator<[number, T]>;
+
+    /**
+     * Returns an iterable of keys in the array
+     */
+    keys(): IterableIterator<number>;
+
+    /**
+     * Returns an iterable of values in the array
+     */
+    values(): IterableIterator<T>;
+}
+
+interface IArguments {
+    /** Iterator */
+    [Symbol.iterator](): IterableIterator<any>;
+}
+
+interface Map<K, V> {
+    /** Returns an iterable of entries in the map. */
+    [Symbol.iterator](): IterableIterator<[K, V]>;
+
+    /**
+     * Returns an iterable of key, value pairs for every entry in the map.
+     */
+    entries(): IterableIterator<[K, V]>;
+
+    /**
+     * Returns an iterable of keys in the map
+     */
+    keys(): IterableIterator<K>;
+
+    /**
+     * Returns an iterable of values in the map
+     */
+    values(): IterableIterator<V>;
+}
+
+interface ReadonlyMap<K, V> {
+    /** Returns an iterable of entries in the map. */
+    [Symbol.iterator](): IterableIterator<[K, V]>;
+
+    /**
+     * Returns an iterable of key, value pairs for every entry in the map.
+     */
+    entries(): IterableIterator<[K, V]>;
+
+    /**
+     * Returns an iterable of keys in the map
+     */
+    keys(): IterableIterator<K>;
+
+    /**
+     * Returns an iterable of values in the map
+     */
+    values(): IterableIterator<V>;
+}
+
+interface MapConstructor {
+    new <K, V>(iterable: Iterable<[K, V]>): Map<K, V>;
+}
+
+interface WeakMap<K extends object, V> { }
+
+interface WeakMapConstructor {
+    new <K extends object, V>(iterable: Iterable<[K, V]>): WeakMap<K, V>;
+}
+
+interface Set<T> {
+    /** Iterates over values in the set. */
+    [Symbol.iterator](): IterableIterator<T>;
+    /**
+     * Returns an iterable of [v,v] pairs for every value `v` in the set.
+     */
+    entries(): IterableIterator<[T, T]>;
+    /**
+     * Despite its name, returns an iterable of the values in the set,
+     */
+    keys(): IterableIterator<T>;
+
+    /**
+     * Returns an iterable of values in the set.
+     */
+    values(): IterableIterator<T>;
+}
+
+interface ReadonlySet<T> {
+    /** Iterates over values in the set. */
+    [Symbol.iterator](): IterableIterator<T>;
+
+    /**
+     * Returns an iterable of [v,v] pairs for every value `v` in the set.
+     */
+    entries(): IterableIterator<[T, T]>;
+
+    /**
+     * Despite its name, returns an iterable of the values in the set,
+     */
+    keys(): IterableIterator<T>;
+
+    /**
+     * Returns an iterable of values in the set.
+     */
+    values(): IterableIterator<T>;
+}
+
+interface SetConstructor {
+    new <T>(iterable: Iterable<T>): Set<T>;
+}
+
+interface WeakSet<T> { }
+
+interface WeakSetConstructor {
+    new <T extends object>(iterable: Iterable<T>): WeakSet<T>;
+}
+
+interface Promise<T> { }
+
+interface PromiseConstructor {
+    /**
+     * Creates a Promise that is resolved with an array of results when all of the provided Promises
+     * resolve, or rejected when any Promise is rejected.
+     * @param values An array of Promises.
+     * @returns A new Promise.
+     */
+    all<TAll>(values: Iterable<TAll | PromiseLike<TAll>>): Promise<TAll[]>;
+
+    /**
+     * Creates a Promise that is resolved or rejected when any of the provided Promises are resolved
+     * or rejected.
+     * @param values An array of Promises.
+     * @returns A new Promise.
+     */
+    race<T>(values: Iterable<T | PromiseLike<T>>): Promise<T>;
+}
+
+declare namespace Reflect {
+    function enumerate(target: object): IterableIterator<any>;
+}
+
+interface String {
+    /** Iterator */
+    [Symbol.iterator](): IterableIterator<string>;
+}
+
+/**
+ * A typed array of 8-bit integer values. The contents are initialized to 0. If the requested
+ * number of bytes could not be allocated an exception is raised.
+ */
+interface Int8Array {
+    [Symbol.iterator](): IterableIterator<number>;
+    /**
+     * Returns an array of key, value pairs for every entry in the array
+     */
+    entries(): IterableIterator<[number, number]>;
+    /**
+     * Returns an list of keys in the array
+     */
+    keys(): IterableIterator<number>;
+    /**
+     * Returns an list of values in the array
+     */
+    values(): IterableIterator<number>;
+}
+
+interface Int8ArrayConstructor {
+    new (elements: Iterable<number>): Int8Array;
+
+    /**
+     * Creates an array from an array-like or iterable object.
+     * @param arrayLike An array-like or iterable object to convert to an array.
+     * @param mapfn A mapping function to call on every element of the array.
+     * @param thisArg Value of 'this' used to invoke the mapfn.
+     */
+    from(arrayLike: Iterable<number>, mapfn: (this: void, v: number, k: number) => number): Int8Array;
+    from(arrayLike: Iterable<number>, mapfn: (this: void, v: number, k: number) => number, thisArg: undefined): Int8Array;
+    from<Z>(arrayLike: Iterable<number>, mapfn: (this: Z, v: number, k: number) => number, thisArg: Z): Int8Array;
+
+    from(arrayLike: Iterable<number>): Int8Array;
+}
+
+/**
+ * A typed array of 8-bit unsigned integer values. The contents are initialized to 0. If the
+ * requested number of bytes could not be allocated an exception is raised.
+ */
+interface Uint8Array {
+    [Symbol.iterator](): IterableIterator<number>;
+    /**
+     * Returns an array of key, value pairs for every entry in the array
+     */
+    entries(): IterableIterator<[number, number]>;
+    /**
+     * Returns an list of keys in the array
+     */
+    keys(): IterableIterator<number>;
+    /**
+     * Returns an list of values in the array
+     */
+    values(): IterableIterator<number>;
+}
+
+interface Uint8ArrayConstructor {
+    new (elements: Iterable<number>): Uint8Array;
+
+    /**
+     * Creates an array from an array-like or iterable object.
+     * @param arrayLike An array-like or iterable object to convert to an array.
+     * @param mapfn A mapping function to call on every element of the array.
+     * @param thisArg Value of 'this' used to invoke the mapfn.
+     */
+    from(arrayLike: Iterable<number>, mapfn: (this: void, v: number, k: number) => number): Uint8Array;
+    from(arrayLike: Iterable<number>, mapfn: (this: void, v: number, k: number) => number, thisArg: undefined): Uint8Array;
+    from<Z>(arrayLike: Iterable<number>, mapfn: (this: Z, v: number, k: number) => number, thisArg: Z): Uint8Array;
+
+    from(arrayLike: Iterable<number>): Uint8Array;
+}
+
+/**
+ * A typed array of 8-bit unsigned integer (clamped) values. The contents are initialized to 0.
+ * If the requested number of bytes could not be allocated an exception is raised.
+ */
+interface Uint8ClampedArray {
+    [Symbol.iterator](): IterableIterator<number>;
+    /**
+     * Returns an array of key, value pairs for every entry in the array
+     */
+    entries(): IterableIterator<[number, number]>;
+
+    /**
+     * Returns an list of keys in the array
+     */
+    keys(): IterableIterator<number>;
+
+    /**
+     * Returns an list of values in the array
+     */
+    values(): IterableIterator<number>;
+}
+
+interface Uint8ClampedArrayConstructor {
+    new (elements: Iterable<number>): Uint8ClampedArray;
+
+
+    /**
+     * Creates an array from an array-like or iterable object.
+     * @param arrayLike An array-like or iterable object to convert to an array.
+     * @param mapfn A mapping function to call on every element of the array.
+     * @param thisArg Value of 'this' used to invoke the mapfn.
+     */
+    from(arrayLike: Iterable<number>, mapfn: (this: void, v: number, k: number) => number): Uint8ClampedArray;
+    from(arrayLike: Iterable<number>, mapfn: (this: void, v: number, k: number) => number, thisArg: undefined): Uint8ClampedArray;
+    from<Z>(arrayLike: Iterable<number>, mapfn: (this: Z, v: number, k: number) => number, thisArg: Z): Uint8ClampedArray;
+
+    from(arrayLike: Iterable<number>): Uint8ClampedArray;
+}
+
+/**
+ * A typed array of 16-bit signed integer values. The contents are initialized to 0. If the
+ * requested number of bytes could not be allocated an exception is raised.
+ */
+interface Int16Array {
+    [Symbol.iterator](): IterableIterator<number>;
+    /**
+     * Returns an array of key, value pairs for every entry in the array
+     */
+    entries(): IterableIterator<[number, number]>;
+
+    /**
+     * Returns an list of keys in the array
+     */
+    keys(): IterableIterator<number>;
+
+    /**
+     * Returns an list of values in the array
+     */
+    values(): IterableIterator<number>;
+}
+
+interface Int16ArrayConstructor {
+    new (elements: Iterable<number>): Int16Array;
+
+    /**
+     * Creates an array from an array-like or iterable object.
+     * @param arrayLike An array-like or iterable object to convert to an array.
+     * @param mapfn A mapping function to call on every element of the array.
+     * @param thisArg Value of 'this' used to invoke the mapfn.
+     */
+    from(arrayLike: Iterable<number>, mapfn: (this: void, v: number, k: number) => number): Int16Array;
+    from(arrayLike: Iterable<number>, mapfn: (this: void, v: number, k: number) => number, thisArg: undefined): Int16Array;
+    from<Z>(arrayLike: Iterable<number>, mapfn: (this: Z, v: number, k: number) => number, thisArg: Z): Int16Array;
+
+    from(arrayLike: Iterable<number>): Int16Array;
+}
+
+/**
+ * A typed array of 16-bit unsigned integer values. The contents are initialized to 0. If the
+ * requested number of bytes could not be allocated an exception is raised.
+ */
+interface Uint16Array {
+    [Symbol.iterator](): IterableIterator<number>;
+    /**
+     * Returns an array of key, value pairs for every entry in the array
+     */
+    entries(): IterableIterator<[number, number]>;
+    /**
+     * Returns an list of keys in the array
+     */
+    keys(): IterableIterator<number>;
+    /**
+     * Returns an list of values in the array
+     */
+    values(): IterableIterator<number>;
+}
+
+interface Uint16ArrayConstructor {
+    new (elements: Iterable<number>): Uint16Array;
+
+    /**
+     * Creates an array from an array-like or iterable object.
+     * @param arrayLike An array-like or iterable object to convert to an array.
+     * @param mapfn A mapping function to call on every element of the array.
+     * @param thisArg Value of 'this' used to invoke the mapfn.
+     */
+    from(arrayLike: Iterable<number>, mapfn: (this: void, v: number, k: number) => number): Uint16Array;
+    from(arrayLike: Iterable<number>, mapfn: (this: void, v: number, k: number) => number, thisArg: undefined): Uint16Array;
+    from<Z>(arrayLike: Iterable<number>, mapfn: (this: Z, v: number, k: number) => number, thisArg: Z): Uint16Array;
+
+    from(arrayLike: Iterable<number>): Uint16Array;
+}
+
+/**
+ * A typed array of 32-bit signed integer values. The contents are initialized to 0. If the
+ * requested number of bytes could not be allocated an exception is raised.
+ */
+interface Int32Array {
+    [Symbol.iterator](): IterableIterator<number>;
+    /**
+     * Returns an array of key, value pairs for every entry in the array
+     */
+    entries(): IterableIterator<[number, number]>;
+    /**
+     * Returns an list of keys in the array
+     */
+    keys(): IterableIterator<number>;
+    /**
+     * Returns an list of values in the array
+     */
+    values(): IterableIterator<number>;
+}
+
+interface Int32ArrayConstructor {
+    new (elements: Iterable<number>): Int32Array;
+
+    /**
+     * Creates an array from an array-like or iterable object.
+     * @param arrayLike An array-like or iterable object to convert to an array.
+     * @param mapfn A mapping function to call on every element of the array.
+     * @param thisArg Value of 'this' used to invoke the mapfn.
+     */
+    from(arrayLike: Iterable<number>, mapfn: (this: void, v: number, k: number) => number): Int32Array;
+    from(arrayLike: Iterable<number>, mapfn: (this: void, v: number, k: number) => number, thisArg: undefined): Int32Array;
+    from<Z>(arrayLike: Iterable<number>, mapfn: (this: Z, v: number, k: number) => number, thisArg: Z): Int32Array;
+
+    from(arrayLike: Iterable<number>): Int32Array;
+}
+
+/**
+ * A typed array of 32-bit unsigned integer values. The contents are initialized to 0. If the
+ * requested number of bytes could not be allocated an exception is raised.
+ */
+interface Uint32Array {
+    [Symbol.iterator](): IterableIterator<number>;
+    /**
+     * Returns an array of key, value pairs for every entry in the array
+     */
+    entries(): IterableIterator<[number, number]>;
+    /**
+     * Returns an list of keys in the array
+     */
+    keys(): IterableIterator<number>;
+    /**
+     * Returns an list of values in the array
+     */
+    values(): IterableIterator<number>;
+}
+
+interface Uint32ArrayConstructor {
+    new (elements: Iterable<number>): Uint32Array;
+
+    /**
+     * Creates an array from an array-like or iterable object.
+     * @param arrayLike An array-like or iterable object to convert to an array.
+     * @param mapfn A mapping function to call on every element of the array.
+     * @param thisArg Value of 'this' used to invoke the mapfn.
+     */
+    from(arrayLike: Iterable<number>, mapfn: (this: void, v: number, k: number) => number): Uint32Array;
+    from(arrayLike: Iterable<number>, mapfn: (this: void, v: number, k: number) => number, thisArg: undefined): Uint32Array;
+    from<Z>(arrayLike: Iterable<number>, mapfn: (this: Z, v: number, k: number) => number, thisArg: Z): Uint32Array;
+
+    from(arrayLike: Iterable<number>): Uint32Array;
+}
+
+/**
+ * A typed array of 32-bit float values. The contents are initialized to 0. If the requested number
+ * of bytes could not be allocated an exception is raised.
+ */
+interface Float32Array {
+    [Symbol.iterator](): IterableIterator<number>;
+    /**
+     * Returns an array of key, value pairs for every entry in the array
+     */
+    entries(): IterableIterator<[number, number]>;
+    /**
+     * Returns an list of keys in the array
+     */
+    keys(): IterableIterator<number>;
+    /**
+     * Returns an list of values in the array
+     */
+    values(): IterableIterator<number>;
+}
+
+interface Float32ArrayConstructor {
+    new (elements: Iterable<number>): Float32Array;
+
+    /**
+     * Creates an array from an array-like or iterable object.
+     * @param arrayLike An array-like or iterable object to convert to an array.
+     * @param mapfn A mapping function to call on every element of the array.
+     * @param thisArg Value of 'this' used to invoke the mapfn.
+     */
+    from(arrayLike: Iterable<number>, mapfn: (this: void, v: number, k: number) => number): Float32Array;
+    from(arrayLike: Iterable<number>, mapfn: (this: void, v: number, k: number) => number, thisArg: undefined): Float32Array;
+    from<Z>(arrayLike: Iterable<number>, mapfn: (this: Z, v: number, k: number) => number, thisArg: Z): Float32Array;
+
+    from(arrayLike: Iterable<number>): Float32Array;
+}
+
+/**
+ * A typed array of 64-bit float values. The contents are initialized to 0. If the requested
+ * number of bytes could not be allocated an exception is raised.
+ */
+interface Float64Array {
+    [Symbol.iterator](): IterableIterator<number>;
+    /**
+     * Returns an array of key, value pairs for every entry in the array
+     */
+    entries(): IterableIterator<[number, number]>;
+    /**
+     * Returns an list of keys in the array
+     */
+    keys(): IterableIterator<number>;
+    /**
+     * Returns an list of values in the array
+     */
+    values(): IterableIterator<number>;
+}
+
+interface Float64ArrayConstructor {
+    new (elements: Iterable<number>): Float64Array;
+
+    /**
+     * Creates an array from an array-like or iterable object.
+     * @param arrayLike An array-like or iterable object to convert to an array.
+     * @param mapfn A mapping function to call on every element of the array.
+     * @param thisArg Value of 'this' used to invoke the mapfn.
+     */
+    from(arrayLike: Iterable<number>, mapfn: (this: void, v: number, k: number) => number): Float64Array;
+    from(arrayLike: Iterable<number>, mapfn: (this: void, v: number, k: number) => number, thisArg: undefined): Float64Array;
+    from<Z>(arrayLike: Iterable<number>, mapfn: (this: Z, v: number, k: number) => number, thisArg: Z): Float64Array;
+
+    from(arrayLike: Iterable<number>): Float64Array;
+}
diff --git a/bin/lib.es2015.promise.d.ts b/bin/lib.es2015.promise.d.ts
index 36fe9e7..81118e8 100644
--- a/bin/lib.es2015.promise.d.ts
+++ b/bin/lib.es2015.promise.d.ts
@@ -1,270 +1,223 @@
-/*! *****************************************************************************
-Copyright (c) Microsoft Corporation. All rights reserved. 
-Licensed under the Apache License, Version 2.0 (the "License"); you may not use
-this file except in compliance with the License. You may obtain a copy of the
-License at http://www.apache.org/licenses/LICENSE-2.0  
- 
-THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
-WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
-MERCHANTABLITY OR NON-INFRINGEMENT. 
- 
-See the Apache Version 2.0 License for specific language governing permissions
-and limitations under the License.
-***************************************************************************** */
-
-/// <reference no-default-lib="true"/>
-/**
- * Represents the completion of an asynchronous operation
- */
-interface Promise<T> {
-    /**
-     * Attaches callbacks for the resolution and/or rejection of the Promise.
-     * @param onfulfilled The callback to execute when the Promise is resolved.
-     * @param onrejected The callback to execute when the Promise is rejected.
-     * @returns A Promise for the completion of which ever callback is executed.
-     */
-    then(onfulfilled?: ((value: T) => T | PromiseLike<T>) | undefined | null, onrejected?: ((reason: any) => T | PromiseLike<T>) | undefined | null): Promise<T>;
-
-    /**
-     * Attaches callbacks for the resolution and/or rejection of the Promise.
-     * @param onfulfilled The callback to execute when the Promise is resolved.
-     * @param onrejected The callback to execute when the Promise is rejected.
-     * @returns A Promise for the completion of which ever callback is executed.
-     */
-    then<TResult>(onfulfilled: ((value: T) => T | PromiseLike<T>) | undefined | null, onrejected: (reason: any) => TResult | PromiseLike<TResult>): Promise<T | TResult>;
-
-    /**
-     * Attaches callbacks for the resolution and/or rejection of the Promise.
-     * @param onfulfilled The callback to execute when the Promise is resolved.
-     * @param onrejected The callback to execute when the Promise is rejected.
-     * @returns A Promise for the completion of which ever callback is executed.
-     */
-    then<TResult>(onfulfilled: (value: T) => TResult | PromiseLike<TResult>, onrejected?: ((reason: any) => TResult | PromiseLike<TResult>) | undefined | null): Promise<TResult>;
-
-    /**
-     * Attaches callbacks for the resolution and/or rejection of the Promise.
-     * @param onfulfilled The callback to execute when the Promise is resolved.
-     * @param onrejected The callback to execute when the Promise is rejected.
-     * @returns A Promise for the completion of which ever callback is executed.
-     */
-    then<TResult1, TResult2>(onfulfilled: (value: T) => TResult1 | PromiseLike<TResult1>, onrejected: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>;
-
-    /**
-     * Attaches a callback for only the rejection of the Promise.
-     * @param onrejected The callback to execute when the Promise is rejected.
-     * @returns A Promise for the completion of the callback.
-     */
-    catch(onrejected?: ((reason: any) => T | PromiseLike<T>) | undefined | null): Promise<T>;
-
-    /**
-     * Attaches a callback for only the rejection of the Promise.
-     * @param onrejected The callback to execute when the Promise is rejected.
-     * @returns A Promise for the completion of the callback.
-     */
-    catch<TResult>(onrejected: (reason: any) => TResult | PromiseLike<TResult>): Promise<T | TResult>;
-}
-
-interface PromiseConstructor {
-    /**
-      * A reference to the prototype.
-      */
-    readonly prototype: Promise<any>;
-
-    /**
-     * Creates a new Promise.
-     * @param executor A callback used to initialize the promise. This callback is passed two arguments:
-     * a resolve callback used resolve the promise with a value or the result of another promise,
-     * and a reject callback used to reject the promise with a provided reason or error.
-     */
-    new <T>(executor: (resolve: (value?: T | PromiseLike<T>) => void, reject: (reason?: any) => void) => void): Promise<T>;
-
-    /**
-     * Creates a Promise that is resolved with an array of results when all of the provided Promises
-     * resolve, or rejected when any Promise is rejected.
-     * @param values An array of Promises.
-     * @returns A new Promise.
-     */
-    all<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike <T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>, T7 | PromiseLike<T7>, T8 | PromiseLike<T8>, T9 | PromiseLike<T9>, T10 | PromiseLike<T10>]): Promise<[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10]>;
-
-    /**
-     * Creates a Promise that is resolved with an array of results when all of the provided Promises
-     * resolve, or rejected when any Promise is rejected.
-     * @param values An array of Promises.
-     * @returns A new Promise.
-     */
-    all<T1, T2, T3, T4, T5, T6, T7, T8, T9>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike <T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>, T7 | PromiseLike<T7>, T8 | PromiseLike<T8>, T9 | PromiseLike<T9>]): Promise<[T1, T2, T3, T4, T5, T6, T7, T8, T9]>;
-
-    /**
-     * Creates a Promise that is resolved with an array of results when all of the provided Promises
-     * resolve, or rejected when any Promise is rejected.
-     * @param values An array of Promises.
-     * @returns A new Promise.
-     */
-    all<T1, T2, T3, T4, T5, T6, T7, T8>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike <T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>, T7 | PromiseLike<T7>, T8 | PromiseLike<T8>]): Promise<[T1, T2, T3, T4, T5, T6, T7, T8]>;
-
-    /**
-     * Creates a Promise that is resolved with an array of results when all of the provided Promises
-     * resolve, or rejected when any Promise is rejected.
-     * @param values An array of Promises.
-     * @returns A new Promise.
-     */
-    all<T1, T2, T3, T4, T5, T6, T7>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike <T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>, T7 | PromiseLike<T7>]): Promise<[T1, T2, T3, T4, T5, T6, T7]>;
-
-    /**
-     * Creates a Promise that is resolved with an array of results when all of the provided Promises
-     * resolve, or rejected when any Promise is rejected.
-     * @param values An array of Promises.
-     * @returns A new Promise.
-     */
-    all<T1, T2, T3, T4, T5, T6>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike <T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>]): Promise<[T1, T2, T3, T4, T5, T6]>;
-
-    /**
-     * Creates a Promise that is resolved with an array of results when all of the provided Promises
-     * resolve, or rejected when any Promise is rejected.
-     * @param values An array of Promises.
-     * @returns A new Promise.
-     */
-    all<T1, T2, T3, T4, T5>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike <T4>, T5 | PromiseLike<T5>]): Promise<[T1, T2, T3, T4, T5]>;
-
-    /**
-     * Creates a Promise that is resolved with an array of results when all of the provided Promises
-     * resolve, or rejected when any Promise is rejected.
-     * @param values An array of Promises.
-     * @returns A new Promise.
-     */
-    all<T1, T2, T3, T4>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike <T4>]): Promise<[T1, T2, T3, T4]>;
-
-    /**
-     * Creates a Promise that is resolved with an array of results when all of the provided Promises
-     * resolve, or rejected when any Promise is rejected.
-     * @param values An array of Promises.
-     * @returns A new Promise.
-     */
-    all<T1, T2, T3>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>]): Promise<[T1, T2, T3]>;
-
-    /**
-     * Creates a Promise that is resolved with an array of results when all of the provided Promises
-     * resolve, or rejected when any Promise is rejected.
-     * @param values An array of Promises.
-     * @returns A new Promise.
-     */
-    all<T1, T2>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>]): Promise<[T1, T2]>;
-
-    /**
-     * Creates a Promise that is resolved with an array of results when all of the provided Promises
-     * resolve, or rejected when any Promise is rejected.
-     * @param values An array of Promises.
-     * @returns A new Promise.
-     */
-    all<T>(values: (T | PromiseLike<T>)[]): Promise<T[]>;
-
-    /**
-     * Creates a Promise that is resolved or rejected when any of the provided Promises are resolved
-     * or rejected.
-     * @param values An array of Promises.
-     * @returns A new Promise.
-     */
-    race<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike<T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>, T7 | PromiseLike<T7>, T8 | PromiseLike<T8>, T9 | PromiseLike<T9>, T10 | PromiseLike<T10>]): Promise<T1 | T2 | T3 | T4 | T5 | T6 | T7 | T8 | T9 | T10>;
-
-    /**
-     * Creates a Promise that is resolved or rejected when any of the provided Promises are resolved
-     * or rejected.
-     * @param values An array of Promises.
-     * @returns A new Promise.
-     */
-    race<T1, T2, T3, T4, T5, T6, T7, T8, T9>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike<T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>, T7 | PromiseLike<T7>, T8 | PromiseLike<T8>, T9 | PromiseLike<T9>]): Promise<T1 | T2 | T3 | T4 | T5 | T6 | T7 | T8 | T9>;
-
-    /**
-     * Creates a Promise that is resolved or rejected when any of the provided Promises are resolved
-     * or rejected.
-     * @param values An array of Promises.
-     * @returns A new Promise.
-     */
-    race<T1, T2, T3, T4, T5, T6, T7, T8>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike<T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>, T7 | PromiseLike<T7>, T8 | PromiseLike<T8>]): Promise<T1 | T2 | T3 | T4 | T5 | T6 | T7 | T8>;
-
-    /**
-     * Creates a Promise that is resolved or rejected when any of the provided Promises are resolved
-     * or rejected.
-     * @param values An array of Promises.
-     * @returns A new Promise.
-     */
-    race<T1, T2, T3, T4, T5, T6, T7>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike<T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>, T7 | PromiseLike<T7>]): Promise<T1 | T2 | T3 | T4 | T5 | T6 | T7>;
-
-    /**
-     * Creates a Promise that is resolved or rejected when any of the provided Promises are resolved
-     * or rejected.
-     * @param values An array of Promises.
-     * @returns A new Promise.
-     */
-    race<T1, T2, T3, T4, T5, T6>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike<T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>]): Promise<T1 | T2 | T3 | T4 | T5 | T6>;
-
-    /**
-     * Creates a Promise that is resolved or rejected when any of the provided Promises are resolved
-     * or rejected.
-     * @param values An array of Promises.
-     * @returns A new Promise.
-     */
-    race<T1, T2, T3, T4, T5>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike<T4>, T5 | PromiseLike<T5>]): Promise<T1 | T2 | T3 | T4 | T5>;
-
-    /**
-     * Creates a Promise that is resolved or rejected when any of the provided Promises are resolved
-     * or rejected.
-     * @param values An array of Promises.
-     * @returns A new Promise.
-     */
-    race<T1, T2, T3, T4>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike<T4>]): Promise<T1 | T2 | T3 | T4>;
-
-    /**
-     * Creates a Promise that is resolved or rejected when any of the provided Promises are resolved
-     * or rejected.
-     * @param values An array of Promises.
-     * @returns A new Promise.
-     */
-    race<T1, T2, T3>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>]): Promise<T1 | T2 | T3>;
-
-    /**
-     * Creates a Promise that is resolved or rejected when any of the provided Promises are resolved
-     * or rejected.
-     * @param values An array of Promises.
-     * @returns A new Promise.
-     */
-    race<T1, T2>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>]): Promise<T1 | T2>;
-
-    /**
-     * Creates a Promise that is resolved or rejected when any of the provided Promises are resolved
-     * or rejected.
-     * @param values An array of Promises.
-     * @returns A new Promise.
-     */
-    race<T>(values: (T | PromiseLike<T>)[]): Promise<T>;
-
-    /**
-     * Creates a new rejected promise for the provided reason.
-     * @param reason The reason the promise was rejected.
-     * @returns A new rejected Promise.
-     */
-    reject(reason: any): Promise<never>;
-
-    /**
-     * Creates a new rejected promise for the provided reason.
-     * @param reason The reason the promise was rejected.
-     * @returns A new rejected Promise.
-     */
-    reject<T>(reason: any): Promise<T>;
-
-    /**
-      * Creates a new resolved promise for the provided value.
-      * @param value A promise.
-      * @returns A promise whose internal state matches the provided promise.
-      */
-    resolve<T>(value: T | PromiseLike<T>): Promise<T>;
-
-    /**
-     * Creates a new resolved promise .
-     * @returns A resolved promise.
-     */
-    resolve(): Promise<void>;
-}
-
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved. 
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0  
+ 
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
+MERCHANTABLITY OR NON-INFRINGEMENT. 
+ 
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+
+
+
+/// <reference no-default-lib="true"/>
+
+
+interface PromiseConstructor {
+    /**
+     * A reference to the prototype.
+     */
+    readonly prototype: Promise<any>;
+
+    /**
+     * Creates a new Promise.
+     * @param executor A callback used to initialize the promise. This callback is passed two arguments:
+     * a resolve callback used resolve the promise with a value or the result of another promise,
+     * and a reject callback used to reject the promise with a provided reason or error.
+     */
+    new <T>(executor: (resolve: (value?: T | PromiseLike<T>) => void, reject: (reason?: any) => void) => void): Promise<T>;
+
+    /**
+     * Creates a Promise that is resolved with an array of results when all of the provided Promises
+     * resolve, or rejected when any Promise is rejected.
+     * @param values An array of Promises.
+     * @returns A new Promise.
+     */
+    all<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike <T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>, T7 | PromiseLike<T7>, T8 | PromiseLike<T8>, T9 | PromiseLike<T9>, T10 | PromiseLike<T10>]): Promise<[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10]>;
+
+    /**
+     * Creates a Promise that is resolved with an array of results when all of the provided Promises
+     * resolve, or rejected when any Promise is rejected.
+     * @param values An array of Promises.
+     * @returns A new Promise.
+     */
+    all<T1, T2, T3, T4, T5, T6, T7, T8, T9>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike <T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>, T7 | PromiseLike<T7>, T8 | PromiseLike<T8>, T9 | PromiseLike<T9>]): Promise<[T1, T2, T3, T4, T5, T6, T7, T8, T9]>;
+
+    /**
+     * Creates a Promise that is resolved with an array of results when all of the provided Promises
+     * resolve, or rejected when any Promise is rejected.
+     * @param values An array of Promises.
+     * @returns A new Promise.
+     */
+    all<T1, T2, T3, T4, T5, T6, T7, T8>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike <T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>, T7 | PromiseLike<T7>, T8 | PromiseLike<T8>]): Promise<[T1, T2, T3, T4, T5, T6, T7, T8]>;
+
+    /**
+     * Creates a Promise that is resolved with an array of results when all of the provided Promises
+     * resolve, or rejected when any Promise is rejected.
+     * @param values An array of Promises.
+     * @returns A new Promise.
+     */
+    all<T1, T2, T3, T4, T5, T6, T7>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike <T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>, T7 | PromiseLike<T7>]): Promise<[T1, T2, T3, T4, T5, T6, T7]>;
+
+    /**
+     * Creates a Promise that is resolved with an array of results when all of the provided Promises
+     * resolve, or rejected when any Promise is rejected.
+     * @param values An array of Promises.
+     * @returns A new Promise.
+     */
+    all<T1, T2, T3, T4, T5, T6>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike <T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>]): Promise<[T1, T2, T3, T4, T5, T6]>;
+
+    /**
+     * Creates a Promise that is resolved with an array of results when all of the provided Promises
+     * resolve, or rejected when any Promise is rejected.
+     * @param values An array of Promises.
+     * @returns A new Promise.
+     */
+    all<T1, T2, T3, T4, T5>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike <T4>, T5 | PromiseLike<T5>]): Promise<[T1, T2, T3, T4, T5]>;
+
+    /**
+     * Creates a Promise that is resolved with an array of results when all of the provided Promises
+     * resolve, or rejected when any Promise is rejected.
+     * @param values An array of Promises.
+     * @returns A new Promise.
+     */
+    all<T1, T2, T3, T4>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike <T4>]): Promise<[T1, T2, T3, T4]>;
+
+    /**
+     * Creates a Promise that is resolved with an array of results when all of the provided Promises
+     * resolve, or rejected when any Promise is rejected.
+     * @param values An array of Promises.
+     * @returns A new Promise.
+     */
+    all<T1, T2, T3>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>]): Promise<[T1, T2, T3]>;
+
+    /**
+     * Creates a Promise that is resolved with an array of results when all of the provided Promises
+     * resolve, or rejected when any Promise is rejected.
+     * @param values An array of Promises.
+     * @returns A new Promise.
+     */
+    all<T1, T2>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>]): Promise<[T1, T2]>;
+
+    /**
+     * Creates a Promise that is resolved with an array of results when all of the provided Promises
+     * resolve, or rejected when any Promise is rejected.
+     * @param values An array of Promises.
+     * @returns A new Promise.
+     */
+    all<T>(values: (T | PromiseLike<T>)[]): Promise<T[]>;
+
+    /**
+     * Creates a Promise that is resolved or rejected when any of the provided Promises are resolved
+     * or rejected.
+     * @param values An array of Promises.
+     * @returns A new Promise.
+     */
+    race<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike<T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>, T7 | PromiseLike<T7>, T8 | PromiseLike<T8>, T9 | PromiseLike<T9>, T10 | PromiseLike<T10>]): Promise<T1 | T2 | T3 | T4 | T5 | T6 | T7 | T8 | T9 | T10>;
+
+    /**
+     * Creates a Promise that is resolved or rejected when any of the provided Promises are resolved
+     * or rejected.
+     * @param values An array of Promises.
+     * @returns A new Promise.
+     */
+    race<T1, T2, T3, T4, T5, T6, T7, T8, T9>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike<T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>, T7 | PromiseLike<T7>, T8 | PromiseLike<T8>, T9 | PromiseLike<T9>]): Promise<T1 | T2 | T3 | T4 | T5 | T6 | T7 | T8 | T9>;
+
+    /**
+     * Creates a Promise that is resolved or rejected when any of the provided Promises are resolved
+     * or rejected.
+     * @param values An array of Promises.
+     * @returns A new Promise.
+     */
+    race<T1, T2, T3, T4, T5, T6, T7, T8>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike<T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>, T7 | PromiseLike<T7>, T8 | PromiseLike<T8>]): Promise<T1 | T2 | T3 | T4 | T5 | T6 | T7 | T8>;
+
+    /**
+     * Creates a Promise that is resolved or rejected when any of the provided Promises are resolved
+     * or rejected.
+     * @param values An array of Promises.
+     * @returns A new Promise.
+     */
+    race<T1, T2, T3, T4, T5, T6, T7>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike<T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>, T7 | PromiseLike<T7>]): Promise<T1 | T2 | T3 | T4 | T5 | T6 | T7>;
+
+    /**
+     * Creates a Promise that is resolved or rejected when any of the provided Promises are resolved
+     * or rejected.
+     * @param values An array of Promises.
+     * @returns A new Promise.
+     */
+    race<T1, T2, T3, T4, T5, T6>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike<T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>]): Promise<T1 | T2 | T3 | T4 | T5 | T6>;
+
+    /**
+     * Creates a Promise that is resolved or rejected when any of the provided Promises are resolved
+     * or rejected.
+     * @param values An array of Promises.
+     * @returns A new Promise.
+     */
+    race<T1, T2, T3, T4, T5>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike<T4>, T5 | PromiseLike<T5>]): Promise<T1 | T2 | T3 | T4 | T5>;
+
+    /**
+     * Creates a Promise that is resolved or rejected when any of the provided Promises are resolved
+     * or rejected.
+     * @param values An array of Promises.
+     * @returns A new Promise.
+     */
+    race<T1, T2, T3, T4>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike<T4>]): Promise<T1 | T2 | T3 | T4>;
+
+    /**
+     * Creates a Promise that is resolved or rejected when any of the provided Promises are resolved
+     * or rejected.
+     * @param values An array of Promises.
+     * @returns A new Promise.
+     */
+    race<T1, T2, T3>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>]): Promise<T1 | T2 | T3>;
+
+    /**
+     * Creates a Promise that is resolved or rejected when any of the provided Promises are resolved
+     * or rejected.
+     * @param values An array of Promises.
+     * @returns A new Promise.
+     */
+    race<T1, T2>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>]): Promise<T1 | T2>;
+
+    /**
+     * Creates a Promise that is resolved or rejected when any of the provided Promises are resolved
+     * or rejected.
+     * @param values An array of Promises.
+     * @returns A new Promise.
+     */
+    race<T>(values: (T | PromiseLike<T>)[]): Promise<T>;
+
+    /**
+     * Creates a new rejected promise for the provided reason.
+     * @param reason The reason the promise was rejected.
+     * @returns A new rejected Promise.
+     */
+    reject(reason: any): Promise<never>;
+
+    /**
+     * Creates a new rejected promise for the provided reason.
+     * @param reason The reason the promise was rejected.
+     * @returns A new rejected Promise.
+     */
+    reject<T>(reason: any): Promise<T>;
+
+    /**
+     * Creates a new resolved promise for the provided value.
+     * @param value A promise.
+     * @returns A promise whose internal state matches the provided promise.
+     */
+    resolve<T>(value: T | PromiseLike<T>): Promise<T>;
+
+    /**
+     * Creates a new resolved promise .
+     * @returns A resolved promise.
+     */
+    resolve(): Promise<void>;
+}
+
 declare var Promise: PromiseConstructor;
\ No newline at end of file
diff --git a/bin/lib.es2015.proxy.d.ts b/bin/lib.es2015.proxy.d.ts
index 3908e97..4408970 100644
--- a/bin/lib.es2015.proxy.d.ts
+++ b/bin/lib.es2015.proxy.d.ts
@@ -1,38 +1,42 @@
-/*! *****************************************************************************
-Copyright (c) Microsoft Corporation. All rights reserved. 
-Licensed under the Apache License, Version 2.0 (the "License"); you may not use
-this file except in compliance with the License. You may obtain a copy of the
-License at http://www.apache.org/licenses/LICENSE-2.0  
- 
-THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
-WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
-MERCHANTABLITY OR NON-INFRINGEMENT. 
- 
-See the Apache Version 2.0 License for specific language governing permissions
-and limitations under the License.
-***************************************************************************** */
-
-/// <reference no-default-lib="true"/>
-interface ProxyHandler<T> {
-    getPrototypeOf? (target: T): any;
-    setPrototypeOf? (target: T, v: any): boolean;
-    isExtensible? (target: T): boolean;
-    preventExtensions? (target: T): boolean;
-    getOwnPropertyDescriptor? (target: T, p: PropertyKey): PropertyDescriptor;
-    has? (target: T, p: PropertyKey): boolean;
-    get? (target: T, p: PropertyKey, receiver: any): any;
-    set? (target: T, p: PropertyKey, value: any, receiver: any): boolean;
-    deleteProperty? (target: T, p: PropertyKey): boolean;
-    defineProperty? (target: T, p: PropertyKey, attributes: PropertyDescriptor): boolean;
-    enumerate? (target: T): PropertyKey[];
-    ownKeys? (target: T): PropertyKey[];
-    apply? (target: T, thisArg: any, argArray?: any): any;
-    construct? (target: T, thisArg: any, argArray?: any): any;
-}
-
-interface ProxyConstructor {
-    revocable<T>(target: T, handler: ProxyHandler<T>): { proxy: T; revoke: () => void; };
-    new <T>(target: T, handler: ProxyHandler<T>): T
-}
-declare var Proxy: ProxyConstructor;
\ No newline at end of file
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved. 
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0  
+ 
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
+MERCHANTABLITY OR NON-INFRINGEMENT. 
+ 
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+
+
+
+/// <reference no-default-lib="true"/>
+
+
+interface ProxyHandler<T extends object> {
+    getPrototypeOf? (target: T): object | null;
+    setPrototypeOf? (target: T, v: any): boolean;
+    isExtensible? (target: T): boolean;
+    preventExtensions? (target: T): boolean;
+    getOwnPropertyDescriptor? (target: T, p: PropertyKey): PropertyDescriptor | undefined;
+    has? (target: T, p: PropertyKey): boolean;
+    get? (target: T, p: PropertyKey, receiver: any): any;
+    set? (target: T, p: PropertyKey, value: any, receiver: any): boolean;
+    deleteProperty? (target: T, p: PropertyKey): boolean;
+    defineProperty? (target: T, p: PropertyKey, attributes: PropertyDescriptor): boolean;
+    enumerate? (target: T): PropertyKey[];
+    ownKeys? (target: T): PropertyKey[];
+    apply? (target: T, thisArg: any, argArray?: any): any;
+    construct? (target: T, argArray: any, newTarget?: any): object;
+}
+
+interface ProxyConstructor {
+    revocable<T extends object>(target: T, handler: ProxyHandler<T>): { proxy: T; revoke: () => void; };
+    new <T extends object>(target: T, handler: ProxyHandler<T>): T;
+}
+declare var Proxy: ProxyConstructor;
diff --git a/bin/lib.es2015.reflect.d.ts b/bin/lib.es2015.reflect.d.ts
index 0f1a491..2bea5f1 100644
--- a/bin/lib.es2015.reflect.d.ts
+++ b/bin/lib.es2015.reflect.d.ts
@@ -1,31 +1,35 @@
-/*! *****************************************************************************
-Copyright (c) Microsoft Corporation. All rights reserved. 
-Licensed under the Apache License, Version 2.0 (the "License"); you may not use
-this file except in compliance with the License. You may obtain a copy of the
-License at http://www.apache.org/licenses/LICENSE-2.0  
- 
-THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
-WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
-MERCHANTABLITY OR NON-INFRINGEMENT. 
- 
-See the Apache Version 2.0 License for specific language governing permissions
-and limitations under the License.
-***************************************************************************** */
-
-/// <reference no-default-lib="true"/>
-declare namespace Reflect {
-    function apply(target: Function, thisArgument: any, argumentsList: ArrayLike<any>): any;
-    function construct(target: Function, argumentsList: ArrayLike<any>, newTarget?: any): any;
-    function defineProperty(target: any, propertyKey: PropertyKey, attributes: PropertyDescriptor): boolean;
-    function deleteProperty(target: any, propertyKey: PropertyKey): boolean;
-    function get(target: any, propertyKey: PropertyKey, receiver?: any): any;
-    function getOwnPropertyDescriptor(target: any, propertyKey: PropertyKey): PropertyDescriptor;
-    function getPrototypeOf(target: any): any;
-    function has(target: any, propertyKey: PropertyKey): boolean;
-    function isExtensible(target: any): boolean;
-    function ownKeys(target: any): Array<PropertyKey>;
-    function preventExtensions(target: any): boolean;
-    function set(target: any, propertyKey: PropertyKey, value: any, receiver?: any): boolean;
-    function setPrototypeOf(target: any, proto: any): boolean;
-}
\ No newline at end of file
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved. 
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0  
+ 
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
+MERCHANTABLITY OR NON-INFRINGEMENT. 
+ 
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+
+
+
+/// <reference no-default-lib="true"/>
+
+
+declare namespace Reflect {
+    function apply(target: Function, thisArgument: any, argumentsList: ArrayLike<any>): any;
+    function construct(target: Function, argumentsList: ArrayLike<any>, newTarget?: any): any;
+    function defineProperty(target: object, propertyKey: PropertyKey, attributes: PropertyDescriptor): boolean;
+    function deleteProperty(target: object, propertyKey: PropertyKey): boolean;
+    function get(target: object, propertyKey: PropertyKey, receiver?: any): any;
+    function getOwnPropertyDescriptor(target: object, propertyKey: PropertyKey): PropertyDescriptor;
+    function getPrototypeOf(target: object): object;
+    function has(target: object, propertyKey: PropertyKey): boolean;
+    function isExtensible(target: object): boolean;
+    function ownKeys(target: object): Array<PropertyKey>;
+    function preventExtensions(target: object): boolean;
+    function set(target: object, propertyKey: PropertyKey, value: any, receiver?: any): boolean;
+    function setPrototypeOf(target: object, proto: any): boolean;
+}
diff --git a/bin/lib.es2015.symbol.d.ts b/bin/lib.es2015.symbol.d.ts
index 4ab7b43..a9cce33 100644
--- a/bin/lib.es2015.symbol.d.ts
+++ b/bin/lib.es2015.symbol.d.ts
@@ -1,52 +1,56 @@
-/*! *****************************************************************************
-Copyright (c) Microsoft Corporation. All rights reserved. 
-Licensed under the Apache License, Version 2.0 (the "License"); you may not use
-this file except in compliance with the License. You may obtain a copy of the
-License at http://www.apache.org/licenses/LICENSE-2.0  
- 
-THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
-WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
-MERCHANTABLITY OR NON-INFRINGEMENT. 
- 
-See the Apache Version 2.0 License for specific language governing permissions
-and limitations under the License.
-***************************************************************************** */
-
-/// <reference no-default-lib="true"/>
-interface Symbol {
-    /** Returns a string representation of an object. */
-    toString(): string;
-
-    /** Returns the primitive value of the specified object. */
-    valueOf(): Object;
-}
-
-interface SymbolConstructor {
-    /** 
-      * A reference to the prototype. 
-      */
-    readonly prototype: Symbol;
-
-    /**
-      * Returns a new unique Symbol value.
-      * @param  description Description of the new Symbol object.
-      */
-    (description?: string|number): symbol;
-
-    /**
-      * Returns a Symbol object from the global symbol registry matching the given key if found. 
-      * Otherwise, returns a new symbol with this key.
-      * @param key key to search for.
-      */
-    for(key: string): symbol;
-
-    /**
-      * Returns a key from the global symbol registry matching the given Symbol if found. 
-      * Otherwise, returns a undefined.
-      * @param sym Symbol to find the key for.
-      */
-    keyFor(sym: symbol): string | undefined;
-}
-
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved. 
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0  
+ 
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
+MERCHANTABLITY OR NON-INFRINGEMENT. 
+ 
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+
+
+
+/// <reference no-default-lib="true"/>
+
+
+interface Symbol {
+    /** Returns a string representation of an object. */
+    toString(): string;
+
+    /** Returns the primitive value of the specified object. */
+    valueOf(): symbol;
+}
+
+interface SymbolConstructor {
+    /**
+     * A reference to the prototype.
+     */
+    readonly prototype: Symbol;
+
+    /**
+     * Returns a new unique Symbol value.
+     * @param  description Description of the new Symbol object.
+     */
+    (description?: string | number): symbol;
+
+    /**
+     * Returns a Symbol object from the global symbol registry matching the given key if found.
+     * Otherwise, returns a new symbol with this key.
+     * @param key key to search for.
+     */
+    for(key: string): symbol;
+
+    /**
+     * Returns a key from the global symbol registry matching the given Symbol if found.
+     * Otherwise, returns a undefined.
+     * @param sym Symbol to find the key for.
+     */
+    keyFor(sym: symbol): string | undefined;
+}
+
 declare var Symbol: SymbolConstructor;
\ No newline at end of file
diff --git a/bin/lib.es2015.symbol.wellknown.d.ts b/bin/lib.es2015.symbol.wellknown.d.ts
index 2d122d1..1d17534 100644
--- a/bin/lib.es2015.symbol.wellknown.d.ts
+++ b/bin/lib.es2015.symbol.wellknown.d.ts
@@ -1,343 +1,347 @@
-/*! *****************************************************************************
-Copyright (c) Microsoft Corporation. All rights reserved. 
-Licensed under the Apache License, Version 2.0 (the "License"); you may not use
-this file except in compliance with the License. You may obtain a copy of the
-License at http://www.apache.org/licenses/LICENSE-2.0  
- 
-THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
-WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
-MERCHANTABLITY OR NON-INFRINGEMENT. 
- 
-See the Apache Version 2.0 License for specific language governing permissions
-and limitations under the License.
-***************************************************************************** */
-
-/// <reference no-default-lib="true"/>
-/// <reference path="lib.es2015.symbol.d.ts" />
-
-interface SymbolConstructor {
-    /** 
-      * A method that determines if a constructor object recognizes an object as one of the 
-      * constructor’s instances. Called by the semantics of the instanceof operator. 
-      */
-    readonly hasInstance: symbol;
-
-    /** 
-      * A Boolean value that if true indicates that an object should flatten to its array elements
-      * by Array.prototype.concat.
-      */
-    readonly isConcatSpreadable: symbol;
-
-    /**
-      * A regular expression method that matches the regular expression against a string. Called 
-      * by the String.prototype.match method. 
-      */
-    readonly match: symbol;
-
-    /** 
-      * A regular expression method that replaces matched substrings of a string. Called by the 
-      * String.prototype.replace method.
-      */
-    readonly replace: symbol;
-
-    /**
-      * A regular expression method that returns the index within a string that matches the 
-      * regular expression. Called by the String.prototype.search method.
-      */
-    readonly search: symbol;
-
-    /** 
-      * A function valued property that is the constructor function that is used to create 
-      * derived objects.
-      */
-    readonly species: symbol;
-
-    /**
-      * A regular expression method that splits a string at the indices that match the regular 
-      * expression. Called by the String.prototype.split method.
-      */
-    readonly split: symbol;
-
-    /** 
-      * A method that converts an object to a corresponding primitive value.
-      * Called by the ToPrimitive abstract operation.
-      */
-    readonly toPrimitive: symbol;
-
-    /** 
-      * A String value that is used in the creation of the default string description of an object.
-      * Called by the built-in method Object.prototype.toString.
-      */
-    readonly toStringTag: symbol;
-
-    /**
-      * An Object whose own property names are property names that are excluded from the 'with'
-      * environment bindings of the associated objects.
-      */
-    readonly unscopables: symbol;
-}
-
-interface Symbol {
-    readonly [Symbol.toStringTag]: "Symbol";
-}
-
-interface Array<T> {
-    /**
-     * Returns an object whose properties have the value 'true'
-     * when they will be absent when used in a 'with' statement.
-     */
-    [Symbol.unscopables](): {
-        copyWithin: boolean;
-        entries: boolean;
-        fill: boolean;
-        find: boolean;
-        findIndex: boolean;
-        keys: boolean;
-        values: boolean;
-    };
-}
-
-interface Date {
-    /**
-     * Converts a Date object to a string.
-     */
-    [Symbol.toPrimitive](hint: "default"): string;
-    /**
-     * Converts a Date object to a string.
-     */
-    [Symbol.toPrimitive](hint: "string"): string;
-    /**
-     * Converts a Date object to a number.
-     */
-    [Symbol.toPrimitive](hint: "number"): number;
-    /**
-     * Converts a Date object to a string or number.
-     *
-     * @param hint The strings "number", "string", or "default" to specify what primitive to return.
-     *
-     * @throws {TypeError} If 'hint' was given something other than "number", "string", or "default".
-     * @returns A number if 'hint' was "number", a string if 'hint' was "string" or "default".
-     */
-    [Symbol.toPrimitive](hint: string): string | number;
-}
-
-interface Map<K, V> {
-    readonly [Symbol.toStringTag]: "Map";
-}
-
-interface WeakMap<K, V>{
-    readonly [Symbol.toStringTag]: "WeakMap";
-}
-
-interface Set<T> {
-    readonly [Symbol.toStringTag]: "Set";
-}
-
-interface WeakSet<T> {
-    readonly [Symbol.toStringTag]: "WeakSet";
-}
-
-interface JSON {
-    readonly [Symbol.toStringTag]: "JSON";
-}
-
-interface Function {
-    /**
-     * Determines whether the given value inherits from this function if this function was used
-     * as a constructor function.
-     *
-     * A constructor function can control which objects are recognized as its instances by
-     * 'instanceof' by overriding this method.
-     */
-    [Symbol.hasInstance](value: any): boolean;
-}
-
-interface GeneratorFunction extends Function {
-    readonly [Symbol.toStringTag]: "GeneratorFunction";
-}
-
-interface Math {
-    readonly [Symbol.toStringTag]: "Math";
-}
-
-interface Promise<T> {
-    readonly [Symbol.toStringTag]: "Promise";
-}
-
-interface PromiseConstructor {
-    readonly [Symbol.species]: Function;
-}
-
-interface RegExp {
-        /**
-      * Matches a string with this regular expression, and returns an array containing the results of
-      * that search.
-      * @param string A string to search within.
-      */
-    [Symbol.match](string: string): RegExpMatchArray | null;
-
-    /**
-      * Replaces text in a string, using this regular expression.
-      * @param string A String object or string literal whose contents matching against
-      *               this regular expression will be replaced
-      * @param replaceValue A String object or string literal containing the text to replace for every 
-      *                     successful match of this regular expression.
-      */
-    [Symbol.replace](string: string, replaceValue: string): string;
-
-    /**
-      * Replaces text in a string, using this regular expression.
-      * @param string A String object or string literal whose contents matching against
-      *               this regular expression will be replaced
-      * @param replacer A function that returns the replacement text.
-      */
-    [Symbol.replace](string: string, replacer: (substring: string, ...args: any[]) => string): string;
-
-    /**
-      * Finds the position beginning first substring match in a regular expression search
-      * using this regular expression.
-      *
-      * @param string The string to search within.
-      */
-    [Symbol.search](string: string): number;
-
-    /**
-      * Returns an array of substrings that were delimited by strings in the original input that
-      * match against this regular expression.
-      *
-      * If the regular expression contains capturing parentheses, then each time this
-      * regular expression matches, the results (including any undefined results) of the
-      * capturing parentheses are spliced.
-      *
-      * @param string string value to split
-      * @param limit if not undefined, the output array is truncated so that it contains no more
-      * than 'limit' elements.
-      */
-    [Symbol.split](string: string, limit?: number): string[];
-}
-
-interface RegExpConstructor {
-    [Symbol.species](): RegExpConstructor;
-}
-
-interface String {
-    /**
-      * Matches a string an object that supports being matched against, and returns an array containing the results of that search.
-      * @param matcher An object that supports being matched against.
-      */
-    match(matcher: { [Symbol.match](string: string): RegExpMatchArray | null; }): RegExpMatchArray | null;
-
-    /**
-      * Replaces text in a string, using an object that supports replacement within a string.
-      * @param searchValue A object can search for and replace matches within a string.
-      * @param replaceValue A string containing the text to replace for every successful match of searchValue in this string.
-      */
-    replace(searchValue: { [Symbol.replace](string: string, replaceValue: string): string; }, replaceValue: string): string;
-
-    /**
-      * Replaces text in a string, using an object that supports replacement within a string.
-      * @param searchValue A object can search for and replace matches within a string.
-      * @param replacer A function that returns the replacement text.
-      */
-    replace(searchValue: { [Symbol.replace](string: string, replacer: (substring: string, ...args: any[]) => string): string; }, replacer: (substring: string, ...args: any[]) => string): string;
-
-    /**
-      * Finds the first substring match in a regular expression search.
-      * @param searcher An object which supports searching within a string.
-      */
-    search(searcher: { [Symbol.search](string: string): number; }): number;
-
-    /**
-      * Split a string into substrings using the specified separator and return them as an array.
-      * @param splitter An object that can split a string.
-      * @param limit A value used to limit the number of elements returned in the array.
-      */
-    split(splitter: { [Symbol.split](string: string, limit?: number): string[]; }, limit?: number): string[];
-}
-
-/**
-  * Represents a raw buffer of binary data, which is used to store data for the 
-  * different typed arrays. ArrayBuffers cannot be read from or written to directly, 
-  * but can be passed to a typed array or DataView Object to interpret the raw 
-  * buffer as needed. 
-  */
-interface ArrayBuffer {
-    readonly [Symbol.toStringTag]: "ArrayBuffer";
-}
-
-interface DataView {
-    readonly [Symbol.toStringTag]: "DataView";
-}
-
-/**
-  * A typed array of 8-bit integer values. The contents are initialized to 0. If the requested 
-  * number of bytes could not be allocated an exception is raised.
-  */
-interface Int8Array {
-    readonly [Symbol.toStringTag]: "Int8Array";
-}
-
-/**
-  * A typed array of 8-bit unsigned integer values. The contents are initialized to 0. If the 
-  * requested number of bytes could not be allocated an exception is raised.
-  */
-interface Uint8Array {
-    readonly [Symbol.toStringTag]: "UInt8Array";
-}
-
-/**
-  * A typed array of 8-bit unsigned integer (clamped) values. The contents are initialized to 0. 
-  * If the requested number of bytes could not be allocated an exception is raised.
-  */
-interface Uint8ClampedArray {
-    readonly [Symbol.toStringTag]: "Uint8ClampedArray";
-}
-
-/**
-  * A typed array of 16-bit signed integer values. The contents are initialized to 0. If the 
-  * requested number of bytes could not be allocated an exception is raised.
-  */
-interface Int16Array {
-    readonly [Symbol.toStringTag]: "Int16Array";
-}
-
-/**
-  * A typed array of 16-bit unsigned integer values. The contents are initialized to 0. If the 
-  * requested number of bytes could not be allocated an exception is raised.
-  */
-interface Uint16Array {
-    readonly [Symbol.toStringTag]: "Uint16Array";
-}
-
-/**
-  * A typed array of 32-bit signed integer values. The contents are initialized to 0. If the 
-  * requested number of bytes could not be allocated an exception is raised.
-  */
-interface Int32Array {
-    readonly [Symbol.toStringTag]: "Int32Array";
-}
-
-/**
-  * A typed array of 32-bit unsigned integer values. The contents are initialized to 0. If the 
-  * requested number of bytes could not be allocated an exception is raised.
-  */
-interface Uint32Array {
-    readonly [Symbol.toStringTag]: "Uint32Array";
-}
-
-/**
-  * A typed array of 32-bit float values. The contents are initialized to 0. If the requested number
-  * of bytes could not be allocated an exception is raised.
-  */
-interface Float32Array {
-    readonly [Symbol.toStringTag]: "Float32Array";
-}
-
-/**
-  * A typed array of 64-bit float values. The contents are initialized to 0. If the requested 
-  * number of bytes could not be allocated an exception is raised.
-  */
-interface Float64Array {
-    readonly [Symbol.toStringTag]: "Float64Array";
-}
\ No newline at end of file
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved. 
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0  
+ 
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
+MERCHANTABLITY OR NON-INFRINGEMENT. 
+ 
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+
+
+
+/// <reference no-default-lib="true"/>
+
+
+/// <reference path="lib.es2015.symbol.d.ts" />
+
+interface SymbolConstructor {
+    /**
+     * A method that determines if a constructor object recognizes an object as one of the
+     * constructor’s instances. Called by the semantics of the instanceof operator.
+     */
+    readonly hasInstance: symbol;
+
+    /**
+     * A Boolean value that if true indicates that an object should flatten to its array elements
+     * by Array.prototype.concat.
+     */
+    readonly isConcatSpreadable: symbol;
+
+    /**
+     * A regular expression method that matches the regular expression against a string. Called
+     * by the String.prototype.match method.
+     */
+    readonly match: symbol;
+
+    /**
+     * A regular expression method that replaces matched substrings of a string. Called by the
+     * String.prototype.replace method.
+     */
+    readonly replace: symbol;
+
+    /**
+     * A regular expression method that returns the index within a string that matches the
+     * regular expression. Called by the String.prototype.search method.
+     */
+    readonly search: symbol;
+
+    /**
+     * A function valued property that is the constructor function that is used to create
+     * derived objects.
+     */
+    readonly species: symbol;
+
+    /**
+     * A regular expression method that splits a string at the indices that match the regular
+     * expression. Called by the String.prototype.split method.
+     */
+    readonly split: symbol;
+
+    /**
+     * A method that converts an object to a corresponding primitive value.
+     * Called by the ToPrimitive abstract operation.
+     */
+    readonly toPrimitive: symbol;
+
+    /**
+     * A String value that is used in the creation of the default string description of an object.
+     * Called by the built-in method Object.prototype.toString.
+     */
+    readonly toStringTag: symbol;
+
+    /**
+     * An Object whose own property names are property names that are excluded from the 'with'
+     * environment bindings of the associated objects.
+     */
+    readonly unscopables: symbol;
+}
+
+interface Symbol {
+    readonly [Symbol.toStringTag]: "Symbol";
+}
+
+interface Array<T> {
+    /**
+     * Returns an object whose properties have the value 'true'
+     * when they will be absent when used in a 'with' statement.
+     */
+    [Symbol.unscopables](): {
+        copyWithin: boolean;
+        entries: boolean;
+        fill: boolean;
+        find: boolean;
+        findIndex: boolean;
+        keys: boolean;
+        values: boolean;
+    };
+}
+
+interface Date {
+    /**
+     * Converts a Date object to a string.
+     */
+    [Symbol.toPrimitive](hint: "default"): string;
+    /**
+     * Converts a Date object to a string.
+     */
+    [Symbol.toPrimitive](hint: "string"): string;
+    /**
+     * Converts a Date object to a number.
+     */
+    [Symbol.toPrimitive](hint: "number"): number;
+    /**
+     * Converts a Date object to a string or number.
+     *
+     * @param hint The strings "number", "string", or "default" to specify what primitive to return.
+     *
+     * @throws {TypeError} If 'hint' was given something other than "number", "string", or "default".
+     * @returns A number if 'hint' was "number", a string if 'hint' was "string" or "default".
+     */
+    [Symbol.toPrimitive](hint: string): string | number;
+}
+
+interface Map<K, V> {
+    readonly [Symbol.toStringTag]: "Map";
+}
+
+interface WeakMap<K extends object, V>{
+    readonly [Symbol.toStringTag]: "WeakMap";
+}
+
+interface Set<T> {
+    readonly [Symbol.toStringTag]: "Set";
+}
+
+interface WeakSet<T> {
+    readonly [Symbol.toStringTag]: "WeakSet";
+}
+
+interface JSON {
+    readonly [Symbol.toStringTag]: "JSON";
+}
+
+interface Function {
+    /**
+     * Determines whether the given value inherits from this function if this function was used
+     * as a constructor function.
+     *
+     * A constructor function can control which objects are recognized as its instances by
+     * 'instanceof' by overriding this method.
+     */
+    [Symbol.hasInstance](value: any): boolean;
+}
+
+interface GeneratorFunction {
+    readonly [Symbol.toStringTag]: "GeneratorFunction";
+}
+
+interface Math {
+    readonly [Symbol.toStringTag]: "Math";
+}
+
+interface Promise<T> {
+    readonly [Symbol.toStringTag]: "Promise";
+}
+
+interface PromiseConstructor {
+    readonly [Symbol.species]: Function;
+}
+
+interface RegExp {
+    /**
+     * Matches a string with this regular expression, and returns an array containing the results of
+     * that search.
+     * @param string A string to search within.
+     */
+    [Symbol.match](string: string): RegExpMatchArray | null;
+
+    /**
+     * Replaces text in a string, using this regular expression.
+     * @param string A String object or string literal whose contents matching against
+     *               this regular expression will be replaced
+     * @param replaceValue A String object or string literal containing the text to replace for every
+     *                     successful match of this regular expression.
+     */
+    [Symbol.replace](string: string, replaceValue: string): string;
+
+    /**
+     * Replaces text in a string, using this regular expression.
+     * @param string A String object or string literal whose contents matching against
+     *               this regular expression will be replaced
+     * @param replacer A function that returns the replacement text.
+     */
+    [Symbol.replace](string: string, replacer: (substring: string, ...args: any[]) => string): string;
+
+    /**
+     * Finds the position beginning first substring match in a regular expression search
+     * using this regular expression.
+     *
+     * @param string The string to search within.
+     */
+    [Symbol.search](string: string): number;
+
+    /**
+     * Returns an array of substrings that were delimited by strings in the original input that
+     * match against this regular expression.
+     *
+     * If the regular expression contains capturing parentheses, then each time this
+     * regular expression matches, the results (including any undefined results) of the
+     * capturing parentheses are spliced.
+     *
+     * @param string string value to split
+     * @param limit if not undefined, the output array is truncated so that it contains no more
+     * than 'limit' elements.
+     */
+    [Symbol.split](string: string, limit?: number): string[];
+}
+
+interface RegExpConstructor {
+    [Symbol.species](): RegExpConstructor;
+}
+
+interface String {
+    /**
+     * Matches a string an object that supports being matched against, and returns an array containing the results of that search.
+     * @param matcher An object that supports being matched against.
+     */
+    match(matcher: { [Symbol.match](string: string): RegExpMatchArray | null; }): RegExpMatchArray | null;
+
+    /**
+     * Replaces text in a string, using an object that supports replacement within a string.
+     * @param searchValue A object can search for and replace matches within a string.
+     * @param replaceValue A string containing the text to replace for every successful match of searchValue in this string.
+     */
+    replace(searchValue: { [Symbol.replace](string: string, replaceValue: string): string; }, replaceValue: string): string;
+
+    /**
+     * Replaces text in a string, using an object that supports replacement within a string.
+     * @param searchValue A object can search for and replace matches within a string.
+     * @param replacer A function that returns the replacement text.
+     */
+    replace(searchValue: { [Symbol.replace](string: string, replacer: (substring: string, ...args: any[]) => string): string; }, replacer: (substring: string, ...args: any[]) => string): string;
+
+    /**
+     * Finds the first substring match in a regular expression search.
+     * @param searcher An object which supports searching within a string.
+     */
+    search(searcher: { [Symbol.search](string: string): number; }): number;
+
+    /**
+     * Split a string into substrings using the specified separator and return them as an array.
+     * @param splitter An object that can split a string.
+     * @param limit A value used to limit the number of elements returned in the array.
+     */
+    split(splitter: { [Symbol.split](string: string, limit?: number): string[]; }, limit?: number): string[];
+}
+
+/**
+ * Represents a raw buffer of binary data, which is used to store data for the
+ * different typed arrays. ArrayBuffers cannot be read from or written to directly,
+ * but can be passed to a typed array or DataView Object to interpret the raw
+ * buffer as needed.
+ */
+interface ArrayBuffer {
+    readonly [Symbol.toStringTag]: "ArrayBuffer";
+}
+
+interface DataView {
+    readonly [Symbol.toStringTag]: "DataView";
+}
+
+/**
+ * A typed array of 8-bit integer values. The contents are initialized to 0. If the requested
+ * number of bytes could not be allocated an exception is raised.
+ */
+interface Int8Array {
+    readonly [Symbol.toStringTag]: "Int8Array";
+}
+
+/**
+ * A typed array of 8-bit unsigned integer values. The contents are initialized to 0. If the
+ * requested number of bytes could not be allocated an exception is raised.
+ */
+interface Uint8Array {
+    readonly [Symbol.toStringTag]: "UInt8Array";
+}
+
+/**
+ * A typed array of 8-bit unsigned integer (clamped) values. The contents are initialized to 0.
+ * If the requested number of bytes could not be allocated an exception is raised.
+ */
+interface Uint8ClampedArray {
+    readonly [Symbol.toStringTag]: "Uint8ClampedArray";
+}
+
+/**
+ * A typed array of 16-bit signed integer values. The contents are initialized to 0. If the
+ * requested number of bytes could not be allocated an exception is raised.
+ */
+interface Int16Array {
+    readonly [Symbol.toStringTag]: "Int16Array";
+}
+
+/**
+ * A typed array of 16-bit unsigned integer values. The contents are initialized to 0. If the
+ * requested number of bytes could not be allocated an exception is raised.
+ */
+interface Uint16Array {
+    readonly [Symbol.toStringTag]: "Uint16Array";
+}
+
+/**
+ * A typed array of 32-bit signed integer values. The contents are initialized to 0. If the
+ * requested number of bytes could not be allocated an exception is raised.
+ */
+interface Int32Array {
+    readonly [Symbol.toStringTag]: "Int32Array";
+}
+
+/**
+ * A typed array of 32-bit unsigned integer values. The contents are initialized to 0. If the
+ * requested number of bytes could not be allocated an exception is raised.
+ */
+interface Uint32Array {
+    readonly [Symbol.toStringTag]: "Uint32Array";
+}
+
+/**
+ * A typed array of 32-bit float values. The contents are initialized to 0. If the requested number
+ * of bytes could not be allocated an exception is raised.
+ */
+interface Float32Array {
+    readonly [Symbol.toStringTag]: "Float32Array";
+}
+
+/**
+ * A typed array of 64-bit float values. The contents are initialized to 0. If the requested
+ * number of bytes could not be allocated an exception is raised.
+ */
+interface Float64Array {
+    readonly [Symbol.toStringTag]: "Float64Array";
+}
diff --git a/bin/lib.es2016.array.include.d.ts b/bin/lib.es2016.array.include.d.ts
index a4677e7..734fa45 100644
--- a/bin/lib.es2016.array.include.d.ts
+++ b/bin/lib.es2016.array.include.d.ts
@@ -1,105 +1,118 @@
-/*! *****************************************************************************
-Copyright (c) Microsoft Corporation. All rights reserved. 
-Licensed under the Apache License, Version 2.0 (the "License"); you may not use
-this file except in compliance with the License. You may obtain a copy of the
-License at http://www.apache.org/licenses/LICENSE-2.0  
- 
-THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
-WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
-MERCHANTABLITY OR NON-INFRINGEMENT. 
- 
-See the Apache Version 2.0 License for specific language governing permissions
-and limitations under the License.
-***************************************************************************** */
-
-/// <reference no-default-lib="true"/>
-interface Array<T> {
-    /**
-      * Determines whether an array includes a certain element, returning true or false as appropriate.
-      * @param searchElement The element to search for.
-      * @param fromIndex The position in this array at which to begin searching for searchElement.
-      */
-    includes(searchElement: T, fromIndex?: number): boolean;
-}
-
-interface Int8Array {
-    /**
-      * Determines whether an array includes a certain element, returning true or false as appropriate.
-      * @param searchElement The element to search for.
-      * @param fromIndex The position in this array at which to begin searching for searchElement.
-      */
-    includes(searchElement: number, fromIndex?: number): boolean;
-}
-
-interface Uint8Array {
-    /**
-      * Determines whether an array includes a certain element, returning true or false as appropriate.
-      * @param searchElement The element to search for.
-      * @param fromIndex The position in this array at which to begin searching for searchElement.
-      */
-    includes(searchElement: number, fromIndex?: number): boolean;
-}
-
-interface Uint8ClampedArray {
-    /**
-      * Determines whether an array includes a certain element, returning true or false as appropriate.
-      * @param searchElement The element to search for.
-      * @param fromIndex The position in this array at which to begin searching for searchElement.
-      */
-    includes(searchElement: number, fromIndex?: number): boolean;
-}
-
-interface Int16Array {
-    /**
-      * Determines whether an array includes a certain element, returning true or false as appropriate.
-      * @param searchElement The element to search for.
-      * @param fromIndex The position in this array at which to begin searching for searchElement.
-      */
-    includes(searchElement: number, fromIndex?: number): boolean;
-}
-
-interface Uint16Array {
-    /**
-      * Determines whether an array includes a certain element, returning true or false as appropriate.
-      * @param searchElement The element to search for.
-      * @param fromIndex The position in this array at which to begin searching for searchElement.
-      */
-    includes(searchElement: number, fromIndex?: number): boolean;
-}
-
-interface Int32Array {
-    /**
-      * Determines whether an array includes a certain element, returning true or false as appropriate.
-      * @param searchElement The element to search for.
-      * @param fromIndex The position in this array at which to begin searching for searchElement.
-      */
-    includes(searchElement: number, fromIndex?: number): boolean;
-}
-
-interface Uint32Array {
-    /**
-      * Determines whether an array includes a certain element, returning true or false as appropriate.
-      * @param searchElement The element to search for.
-      * @param fromIndex The position in this array at which to begin searching for searchElement.
-      */
-    includes(searchElement: number, fromIndex?: number): boolean;
-}
-
-interface Float32Array {
-    /**
-      * Determines whether an array includes a certain element, returning true or false as appropriate.
-      * @param searchElement The element to search for.
-      * @param fromIndex The position in this array at which to begin searching for searchElement.
-      */
-    includes(searchElement: number, fromIndex?: number): boolean;
-}
-
-interface Float64Array {
-    /**
-      * Determines whether an array includes a certain element, returning true or false as appropriate.
-      * @param searchElement The element to search for.
-      * @param fromIndex The position in this array at which to begin searching for searchElement.
-      */
-    includes(searchElement: number, fromIndex?: number): boolean;
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved. 
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0  
+ 
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
+MERCHANTABLITY OR NON-INFRINGEMENT. 
+ 
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+
+
+
+/// <reference no-default-lib="true"/>
+
+
+interface Array<T> {
+    /**
+     * Determines whether an array includes a certain element, returning true or false as appropriate.
+     * @param searchElement The element to search for.
+     * @param fromIndex The position in this array at which to begin searching for searchElement.
+     */
+    includes(searchElement: T, fromIndex?: number): boolean;
+}
+
+interface ReadonlyArray<T> {
+    /**
+     * Determines whether an array includes a certain element, returning true or false as appropriate.
+     * @param searchElement The element to search for.
+     * @param fromIndex The position in this array at which to begin searching for searchElement.
+     */
+    includes(searchElement: T, fromIndex?: number): boolean;
+}
+
+interface Int8Array {
+    /**
+     * Determines whether an array includes a certain element, returning true or false as appropriate.
+     * @param searchElement The element to search for.
+     * @param fromIndex The position in this array at which to begin searching for searchElement.
+     */
+    includes(searchElement: number, fromIndex?: number): boolean;
+}
+
+interface Uint8Array {
+    /**
+     * Determines whether an array includes a certain element, returning true or false as appropriate.
+     * @param searchElement The element to search for.
+     * @param fromIndex The position in this array at which to begin searching for searchElement.
+     */
+    includes(searchElement: number, fromIndex?: number): boolean;
+}
+
+interface Uint8ClampedArray {
+    /**
+     * Determines whether an array includes a certain element, returning true or false as appropriate.
+     * @param searchElement The element to search for.
+     * @param fromIndex The position in this array at which to begin searching for searchElement.
+     */
+    includes(searchElement: number, fromIndex?: number): boolean;
+}
+
+interface Int16Array {
+    /**
+     * Determines whether an array includes a certain element, returning true or false as appropriate.
+     * @param searchElement The element to search for.
+     * @param fromIndex The position in this array at which to begin searching for searchElement.
+     */
+    includes(searchElement: number, fromIndex?: number): boolean;
+}
+
+interface Uint16Array {
+    /**
+     * Determines whether an array includes a certain element, returning true or false as appropriate.
+     * @param searchElement The element to search for.
+     * @param fromIndex The position in this array at which to begin searching for searchElement.
+     */
+    includes(searchElement: number, fromIndex?: number): boolean;
+}
+
+interface Int32Array {
+    /**
+     * Determines whether an array includes a certain element, returning true or false as appropriate.
+     * @param searchElement The element to search for.
+     * @param fromIndex The position in this array at which to begin searching for searchElement.
+     */
+    includes(searchElement: number, fromIndex?: number): boolean;
+}
+
+interface Uint32Array {
+    /**
+     * Determines whether an array includes a certain element, returning true or false as appropriate.
+     * @param searchElement The element to search for.
+     * @param fromIndex The position in this array at which to begin searching for searchElement.
+     */
+    includes(searchElement: number, fromIndex?: number): boolean;
+}
+
+interface Float32Array {
+    /**
+     * Determines whether an array includes a certain element, returning true or false as appropriate.
+     * @param searchElement The element to search for.
+     * @param fromIndex The position in this array at which to begin searching for searchElement.
+     */
+    includes(searchElement: number, fromIndex?: number): boolean;
+}
+
+interface Float64Array {
+    /**
+     * Determines whether an array includes a certain element, returning true or false as appropriate.
+     * @param searchElement The element to search for.
+     * @param fromIndex The position in this array at which to begin searching for searchElement.
+     */
+    includes(searchElement: number, fromIndex?: number): boolean;
 }
\ No newline at end of file
diff --git a/bin/lib.es2016.d.ts b/bin/lib.es2016.d.ts
index 04a2337..50fdffa 100644
--- a/bin/lib.es2016.d.ts
+++ b/bin/lib.es2016.d.ts
@@ -1,18 +1,22 @@
-/*! *****************************************************************************
-Copyright (c) Microsoft Corporation. All rights reserved. 
-Licensed under the Apache License, Version 2.0 (the "License"); you may not use
-this file except in compliance with the License. You may obtain a copy of the
-License at http://www.apache.org/licenses/LICENSE-2.0  
- 
-THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
-WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
-MERCHANTABLITY OR NON-INFRINGEMENT. 
- 
-See the Apache Version 2.0 License for specific language governing permissions
-and limitations under the License.
-***************************************************************************** */
-
-/// <reference no-default-lib="true"/>
-/// <reference path="lib.es2015.d.ts" />
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved. 
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0  
+ 
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
+MERCHANTABLITY OR NON-INFRINGEMENT. 
+ 
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+
+
+
+/// <reference no-default-lib="true"/>
+
+
+/// <reference path="lib.es2015.d.ts" />
 /// <reference path="lib.es2016.array.include.d.ts" />
\ No newline at end of file
diff --git a/bin/lib.es2016.full.d.ts b/bin/lib.es2016.full.d.ts
new file mode 100644
index 0000000..0922059
--- /dev/null
+++ b/bin/lib.es2016.full.d.ts
@@ -0,0 +1,15216 @@
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved. 
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0  
+ 
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
+MERCHANTABLITY OR NON-INFRINGEMENT. 
+ 
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+
+
+
+/// <reference no-default-lib="true"/>
+
+
+/// <reference path="lib.es2015.d.ts" />
+/// <reference path="lib.es2016.array.include.d.ts" />
+
+
+/////////////////////////////
+/// DOM APIs
+/////////////////////////////
+
+interface Account {
+    displayName?: string;
+    id?: string;
+    imageURL?: string;
+    name?: string;
+    rpDisplayName?: string;
+}
+
+interface Algorithm {
+    name: string;
+}
+
+interface AnimationEventInit extends EventInit {
+    animationName?: string;
+    elapsedTime?: number;
+}
+
+interface AssertionOptions {
+    allowList?: ScopedCredentialDescriptor[];
+    extensions?: WebAuthnExtensions;
+    rpId?: USVString;
+    timeoutSeconds?: number;
+}
+
+interface CacheQueryOptions {
+    cacheName?: string;
+    ignoreMethod?: boolean;
+    ignoreSearch?: boolean;
+    ignoreVary?: boolean;
+}
+
+interface ClientData {
+    challenge?: string;
+    extensions?: WebAuthnExtensions;
+    hashAlg?: string | Algorithm;
+    origin?: string;
+    rpId?: string;
+    tokenBinding?: string;
+}
+
+interface CloseEventInit extends EventInit {
+    code?: number;
+    reason?: string;
+    wasClean?: boolean;
+}
+
+interface CompositionEventInit extends UIEventInit {
+    data?: string;
+}
+
+interface ConfirmSiteSpecificExceptionsInformation extends ExceptionInformation {
+    arrayOfDomainStrings?: string[];
+}
+
+interface ConstrainBooleanParameters {
+    exact?: boolean;
+    ideal?: boolean;
+}
+
+interface ConstrainDOMStringParameters {
+    exact?: string | string[];
+    ideal?: string | string[];
+}
+
+interface ConstrainDoubleRange extends DoubleRange {
+    exact?: number;
+    ideal?: number;
+}
+
+interface ConstrainLongRange extends LongRange {
+    exact?: number;
+    ideal?: number;
+}
+
+interface ConstrainVideoFacingModeParameters {
+    exact?: VideoFacingModeEnum | VideoFacingModeEnum[];
+    ideal?: VideoFacingModeEnum | VideoFacingModeEnum[];
+}
+
+interface CustomEventInit extends EventInit {
+    detail?: any;
+}
+
+interface DeviceAccelerationDict {
+    x?: number;
+    y?: number;
+    z?: number;
+}
+
+interface DeviceLightEventInit extends EventInit {
+    value?: number;
+}
+
+interface DeviceMotionEventInit extends EventInit {
+    acceleration?: DeviceAccelerationDict;
+    accelerationIncludingGravity?: DeviceAccelerationDict;
+    interval?: number;
+    rotationRate?: DeviceRotationRateDict;
+}
+
+interface DeviceOrientationEventInit extends EventInit {
+    absolute?: boolean;
+    alpha?: number;
+    beta?: number;
+    gamma?: number;
+}
+
+interface DeviceRotationRateDict {
+    alpha?: number;
+    beta?: number;
+    gamma?: number;
+}
+
+interface DOMRectInit {
+    height?: any;
+    width?: any;
+    x?: any;
+    y?: any;
+}
+
+interface DoubleRange {
+    max?: number;
+    min?: number;
+}
+
+interface ErrorEventInit extends EventInit {
+    colno?: number;
+    error?: any;
+    filename?: string;
+    lineno?: number;
+    message?: string;
+}
+
+interface EventInit {
+    scoped?: boolean;
+    bubbles?: boolean;
+    cancelable?: boolean;
+}
+
+interface EventModifierInit extends UIEventInit {
+    altKey?: boolean;
+    ctrlKey?: boolean;
+    metaKey?: boolean;
+    modifierAltGraph?: boolean;
+    modifierCapsLock?: boolean;
+    modifierFn?: boolean;
+    modifierFnLock?: boolean;
+    modifierHyper?: boolean;
+    modifierNumLock?: boolean;
+    modifierOS?: boolean;
+    modifierScrollLock?: boolean;
+    modifierSuper?: boolean;
+    modifierSymbol?: boolean;
+    modifierSymbolLock?: boolean;
+    shiftKey?: boolean;
+}
+
+interface ExceptionInformation {
+    domain?: string;
+}
+
+interface FocusEventInit extends UIEventInit {
+    relatedTarget?: EventTarget;
+}
+
+interface FocusNavigationEventInit extends EventInit {
+    navigationReason?: string;
+    originHeight?: number;
+    originLeft?: number;
+    originTop?: number;
+    originWidth?: number;
+}
+
+interface FocusNavigationOrigin {
+    originHeight?: number;
+    originLeft?: number;
+    originTop?: number;
+    originWidth?: number;
+}
+
+interface GamepadEventInit extends EventInit {
+    gamepad?: Gamepad;
+}
+
+interface GetNotificationOptions {
+    tag?: string;
+}
+
+interface HashChangeEventInit extends EventInit {
+    newURL?: string;
+    oldURL?: string;
+}
+
+interface IDBIndexParameters {
+    multiEntry?: boolean;
+    unique?: boolean;
+}
+
+interface IDBObjectStoreParameters {
+    autoIncrement?: boolean;
+    keyPath?: IDBKeyPath;
+}
+
+interface IntersectionObserverEntryInit {
+    boundingClientRect?: DOMRectInit;
+    intersectionRect?: DOMRectInit;
+    rootBounds?: DOMRectInit;
+    target?: Element;
+    time?: number;
+}
+
+interface IntersectionObserverInit {
+    root?: Element;
+    rootMargin?: string;
+    threshold?: number | number[];
+}
+
+interface KeyAlgorithm {
+    name?: string;
+}
+
+interface KeyboardEventInit extends EventModifierInit {
+    code?: string;
+    key?: string;
+    location?: number;
+    repeat?: boolean;
+}
+
+interface LongRange {
+    max?: number;
+    min?: number;
+}
+
+interface MediaEncryptedEventInit extends EventInit {
+    initData?: ArrayBuffer;
+    initDataType?: string;
+}
+
+interface MediaKeyMessageEventInit extends EventInit {
+    message?: ArrayBuffer;
+    messageType?: MediaKeyMessageType;
+}
+
+interface MediaKeySystemConfiguration {
+    audioCapabilities?: MediaKeySystemMediaCapability[];
+    distinctiveIdentifier?: MediaKeysRequirement;
+    initDataTypes?: string[];
+    persistentState?: MediaKeysRequirement;
+    videoCapabilities?: MediaKeySystemMediaCapability[];
+}
+
+interface MediaKeySystemMediaCapability {
+    contentType?: string;
+    robustness?: string;
+}
+
+interface MediaStreamConstraints {
+    audio?: boolean | MediaTrackConstraints;
+    video?: boolean | MediaTrackConstraints;
+}
+
+interface MediaStreamErrorEventInit extends EventInit {
+    error?: MediaStreamError;
+}
+
+interface MediaStreamEventInit extends EventInit {
+    stream?: MediaStream;
+}
+
+interface MediaStreamTrackEventInit extends EventInit {
+    track?: MediaStreamTrack;
+}
+
+interface MediaTrackCapabilities {
+    aspectRatio?: number | DoubleRange;
+    deviceId?: string;
+    echoCancellation?: boolean[];
+    facingMode?: string;
+    frameRate?: number | DoubleRange;
+    groupId?: string;
+    height?: number | LongRange;
+    sampleRate?: number | LongRange;
+    sampleSize?: number | LongRange;
+    volume?: number | DoubleRange;
+    width?: number | LongRange;
+}
+
+interface MediaTrackConstraints extends MediaTrackConstraintSet {
+    advanced?: MediaTrackConstraintSet[];
+}
+
+interface MediaTrackConstraintSet {
+    aspectRatio?: number | ConstrainDoubleRange;
+    deviceId?: string | string[] | ConstrainDOMStringParameters;
+    echoCancelation?: boolean | ConstrainBooleanParameters;
+    facingMode?: string | string[] | ConstrainDOMStringParameters;
+    frameRate?: number | ConstrainDoubleRange;
+    groupId?: string | string[] | ConstrainDOMStringParameters;
+    height?: number | ConstrainLongRange;
+    sampleRate?: number | ConstrainLongRange;
+    sampleSize?: number | ConstrainLongRange;
+    volume?: number | ConstrainDoubleRange;
+    width?: number | ConstrainLongRange;
+}
+
+interface MediaTrackSettings {
+    aspectRatio?: number;
+    deviceId?: string;
+    echoCancellation?: boolean;
+    facingMode?: string;
+    frameRate?: number;
+    groupId?: string;
+    height?: number;
+    sampleRate?: number;
+    sampleSize?: number;
+    volume?: number;
+    width?: number;
+}
+
+interface MediaTrackSupportedConstraints {
+    aspectRatio?: boolean;
+    deviceId?: boolean;
+    echoCancellation?: boolean;
+    facingMode?: boolean;
+    frameRate?: boolean;
+    groupId?: boolean;
+    height?: boolean;
+    sampleRate?: boolean;
+    sampleSize?: boolean;
+    volume?: boolean;
+    width?: boolean;
+}
+
+interface MessageEventInit extends EventInit {
+    lastEventId?: string;
+    channel?: string;
+    data?: any;
+    origin?: string;
+    ports?: MessagePort[];
+    source?: Window;
+}
+
+interface MouseEventInit extends EventModifierInit {
+    button?: number;
+    buttons?: number;
+    clientX?: number;
+    clientY?: number;
+    relatedTarget?: EventTarget;
+    screenX?: number;
+    screenY?: number;
+}
+
+interface MSAccountInfo {
+    accountImageUri?: string;
+    accountName?: string;
+    rpDisplayName?: string;
+    userDisplayName?: string;
+    userId?: string;
+}
+
+interface MSAudioLocalClientEvent extends MSLocalClientEventBase {
+    cpuInsufficientEventRatio?: number;
+    deviceCaptureNotFunctioningEventRatio?: number;
+    deviceClippingEventRatio?: number;
+    deviceEchoEventRatio?: number;
+    deviceGlitchesEventRatio?: number;
+    deviceHalfDuplexAECEventRatio?: number;
+    deviceHowlingEventCount?: number;
+    deviceLowSNREventRatio?: number;
+    deviceLowSpeechLevelEventRatio?: number;
+    deviceMultipleEndpointsEventCount?: number;
+    deviceNearEndToEchoRatioEventRatio?: number;
+    deviceRenderMuteEventRatio?: number;
+    deviceRenderNotFunctioningEventRatio?: number;
+    deviceRenderZeroVolumeEventRatio?: number;
+    networkDelayEventRatio?: number;
+    networkSendQualityEventRatio?: number;
+}
+
+interface MSAudioRecvPayload extends MSPayloadBase {
+    burstLossLength1?: number;
+    burstLossLength2?: number;
+    burstLossLength3?: number;
+    burstLossLength4?: number;
+    burstLossLength5?: number;
+    burstLossLength6?: number;
+    burstLossLength7?: number;
+    burstLossLength8OrHigher?: number;
+    fecRecvDistance1?: number;
+    fecRecvDistance2?: number;
+    fecRecvDistance3?: number;
+    packetReorderDepthAvg?: number;
+    packetReorderDepthMax?: number;
+    packetReorderRatio?: number;
+    ratioCompressedSamplesAvg?: number;
+    ratioConcealedSamplesAvg?: number;
+    ratioStretchedSamplesAvg?: number;
+    samplingRate?: number;
+    signal?: MSAudioRecvSignal;
+}
+
+interface MSAudioRecvSignal {
+    initialSignalLevelRMS?: number;
+    recvNoiseLevelCh1?: number;
+    recvSignalLevelCh1?: number;
+    renderLoopbackSignalLevel?: number;
+    renderNoiseLevel?: number;
+    renderSignalLevel?: number;
+}
+
+interface MSAudioSendPayload extends MSPayloadBase {
+    audioFECUsed?: boolean;
+    samplingRate?: number;
+    sendMutePercent?: number;
+    signal?: MSAudioSendSignal;
+}
+
+interface MSAudioSendSignal {
+    noiseLevel?: number;
+    sendNoiseLevelCh1?: number;
+    sendSignalLevelCh1?: number;
+}
+
+interface MSConnectivity {
+    iceType?: MSIceType;
+    iceWarningFlags?: MSIceWarningFlags;
+    relayAddress?: MSRelayAddress;
+}
+
+interface MSCredentialFilter {
+    accept?: MSCredentialSpec[];
+}
+
+interface MSCredentialParameters {
+    type?: MSCredentialType;
+}
+
+interface MSCredentialSpec {
+    id?: string;
+    type?: MSCredentialType;
+}
+
+interface MSDelay {
+    roundTrip?: number;
+    roundTripMax?: number;
+}
+
+interface MSDescription extends RTCStats {
+    connectivity?: MSConnectivity;
+    deviceDevName?: string;
+    localAddr?: MSIPAddressInfo;
+    networkconnectivity?: MSNetworkConnectivityInfo;
+    reflexiveLocalIPAddr?: MSIPAddressInfo;
+    remoteAddr?: MSIPAddressInfo;
+    transport?: RTCIceProtocol;
+}
+
+interface MSFIDOCredentialParameters extends MSCredentialParameters {
+    algorithm?: string | Algorithm;
+    authenticators?: AAGUID[];
+}
+
+interface MSIceWarningFlags {
+    allocationMessageIntegrityFailed?: boolean;
+    alternateServerReceived?: boolean;
+    connCheckMessageIntegrityFailed?: boolean;
+    connCheckOtherError?: boolean;
+    fipsAllocationFailure?: boolean;
+    multipleRelayServersAttempted?: boolean;
+    noRelayServersConfigured?: boolean;
+    portRangeExhausted?: boolean;
+    pseudoTLSFailure?: boolean;
+    tcpNatConnectivityFailed?: boolean;
+    tcpRelayConnectivityFailed?: boolean;
+    turnAuthUnknownUsernameError?: boolean;
+    turnTcpAllocateFailed?: boolean;
+    turnTcpSendFailed?: boolean;
+    turnTcpTimedOut?: boolean;
+    turnTurnTcpConnectivityFailed?: boolean;
+    turnUdpAllocateFailed?: boolean;
+    turnUdpSendFailed?: boolean;
+    udpLocalConnectivityFailed?: boolean;
+    udpNatConnectivityFailed?: boolean;
+    udpRelayConnectivityFailed?: boolean;
+    useCandidateChecksFailed?: boolean;
+}
+
+interface MSIPAddressInfo {
+    ipAddr?: string;
+    manufacturerMacAddrMask?: string;
+    port?: number;
+}
+
+interface MSJitter {
+    interArrival?: number;
+    interArrivalMax?: number;
+    interArrivalSD?: number;
+}
+
+interface MSLocalClientEventBase extends RTCStats {
+    networkBandwidthLowEventRatio?: number;
+    networkReceiveQualityEventRatio?: number;
+}
+
+interface MSNetwork extends RTCStats {
+    delay?: MSDelay;
+    jitter?: MSJitter;
+    packetLoss?: MSPacketLoss;
+    utilization?: MSUtilization;
+}
+
+interface MSNetworkConnectivityInfo {
+    linkspeed?: number;
+    networkConnectionDetails?: string;
+    vpn?: boolean;
+}
+
+interface MSNetworkInterfaceType {
+    interfaceTypeEthernet?: boolean;
+    interfaceTypePPP?: boolean;
+    interfaceTypeTunnel?: boolean;
+    interfaceTypeWireless?: boolean;
+    interfaceTypeWWAN?: boolean;
+}
+
+interface MSOutboundNetwork extends MSNetwork {
+    appliedBandwidthLimit?: number;
+}
+
+interface MSPacketLoss {
+    lossRate?: number;
+    lossRateMax?: number;
+}
+
+interface MSPayloadBase extends RTCStats {
+    payloadDescription?: string;
+}
+
+interface MSPortRange {
+    max?: number;
+    min?: number;
+}
+
+interface MSRelayAddress {
+    port?: number;
+    relayAddress?: string;
+}
+
+interface MSSignatureParameters {
+    userPrompt?: string;
+}
+
+interface MSTransportDiagnosticsStats extends RTCStats {
+    allocationTimeInMs?: number;
+    baseAddress?: string;
+    baseInterface?: MSNetworkInterfaceType;
+    iceRole?: RTCIceRole;
+    iceWarningFlags?: MSIceWarningFlags;
+    interfaces?: MSNetworkInterfaceType;
+    localAddress?: string;
+    localAddrType?: MSIceAddrType;
+    localInterface?: MSNetworkInterfaceType;
+    localMR?: string;
+    localMRTCPPort?: number;
+    localSite?: string;
+    msRtcEngineVersion?: string;
+    networkName?: string;
+    numConsentReqReceived?: number;
+    numConsentReqSent?: number;
+    numConsentRespReceived?: number;
+    numConsentRespSent?: number;
+    portRangeMax?: number;
+    portRangeMin?: number;
+    protocol?: RTCIceProtocol;
+    remoteAddress?: string;
+    remoteAddrType?: MSIceAddrType;
+    remoteMR?: string;
+    remoteMRTCPPort?: number;
+    remoteSite?: string;
+    rtpRtcpMux?: boolean;
+    stunVer?: number;
+}
+
+interface MSUtilization {
+    bandwidthEstimation?: number;
+    bandwidthEstimationAvg?: number;
+    bandwidthEstimationMax?: number;
+    bandwidthEstimationMin?: number;
+    bandwidthEstimationStdDev?: number;
+    packets?: number;
+}
+
+interface MSVideoPayload extends MSPayloadBase {
+    durationSeconds?: number;
+    resolution?: string;
+    videoBitRateAvg?: number;
+    videoBitRateMax?: number;
+    videoFrameRateAvg?: number;
+    videoPacketLossRate?: number;
+}
+
+interface MSVideoRecvPayload extends MSVideoPayload {
+    lowBitRateCallPercent?: number;
+    lowFrameRateCallPercent?: number;
+    recvBitRateAverage?: number;
+    recvBitRateMaximum?: number;
+    recvCodecType?: string;
+    recvFpsHarmonicAverage?: number;
+    recvFrameRateAverage?: number;
+    recvNumResSwitches?: number;
+    recvReorderBufferMaxSuccessfullyOrderedExtent?: number;
+    recvReorderBufferMaxSuccessfullyOrderedLateTime?: number;
+    recvReorderBufferPacketsDroppedDueToBufferExhaustion?: number;
+    recvReorderBufferPacketsDroppedDueToTimeout?: number;
+    recvReorderBufferReorderedPackets?: number;
+    recvResolutionHeight?: number;
+    recvResolutionWidth?: number;
+    recvVideoStreamsMax?: number;
+    recvVideoStreamsMin?: number;
+    recvVideoStreamsMode?: number;
+    reorderBufferTotalPackets?: number;
+    videoFrameLossRate?: number;
+    videoPostFECPLR?: number;
+    videoResolutions?: MSVideoResolutionDistribution;
+}
+
+interface MSVideoResolutionDistribution {
+    cifQuality?: number;
+    h1080Quality?: number;
+    h1440Quality?: number;
+    h2160Quality?: number;
+    h720Quality?: number;
+    vgaQuality?: number;
+}
+
+interface MSVideoSendPayload extends MSVideoPayload {
+    sendBitRateAverage?: number;
+    sendBitRateMaximum?: number;
+    sendFrameRateAverage?: number;
+    sendResolutionHeight?: number;
+    sendResolutionWidth?: number;
+    sendVideoStreamsMax?: number;
+}
+
+interface MsZoomToOptions {
+    animate?: string;
+    contentX?: number;
+    contentY?: number;
+    scaleFactor?: number;
+    viewportX?: string;
+    viewportY?: string;
+}
+
+interface MutationObserverInit {
+    attributeFilter?: string[];
+    attributeOldValue?: boolean;
+    attributes?: boolean;
+    characterData?: boolean;
+    characterDataOldValue?: boolean;
+    childList?: boolean;
+    subtree?: boolean;
+}
+
+interface NotificationOptions {
+    body?: string;
+    dir?: NotificationDirection;
+    icon?: string;
+    lang?: string;
+    tag?: string;
+}
+
+interface ObjectURLOptions {
+    oneTimeOnly?: boolean;
+}
+
+interface PaymentCurrencyAmount {
+    currency?: string;
+    currencySystem?: string;
+    value?: string;
+}
+
+interface PaymentDetails {
+    displayItems?: PaymentItem[];
+    error?: string;
+    modifiers?: PaymentDetailsModifier[];
+    shippingOptions?: PaymentShippingOption[];
+    total?: PaymentItem;
+}
+
+interface PaymentDetailsModifier {
+    additionalDisplayItems?: PaymentItem[];
+    data?: any;
+    supportedMethods?: string[];
+    total?: PaymentItem;
+}
+
+interface PaymentItem {
+    amount?: PaymentCurrencyAmount;
+    label?: string;
+    pending?: boolean;
+}
+
+interface PaymentMethodData {
+    data?: any;
+    supportedMethods?: string[];
+}
+
+interface PaymentOptions {
+    requestPayerEmail?: boolean;
+    requestPayerName?: boolean;
+    requestPayerPhone?: boolean;
+    requestShipping?: boolean;
+    shippingType?: string;
+}
+
+interface PaymentRequestUpdateEventInit extends EventInit {
+}
+
+interface PaymentShippingOption {
+    amount?: PaymentCurrencyAmount;
+    id?: string;
+    label?: string;
+    selected?: boolean;
+}
+
+interface PeriodicWaveConstraints {
+    disableNormalization?: boolean;
+}
+
+interface PointerEventInit extends MouseEventInit {
+    height?: number;
+    isPrimary?: boolean;
+    pointerId?: number;
+    pointerType?: string;
+    pressure?: number;
+    tiltX?: number;
+    tiltY?: number;
+    width?: number;
+}
+
+interface PopStateEventInit extends EventInit {
+    state?: any;
+}
+
+interface PositionOptions {
+    enableHighAccuracy?: boolean;
+    maximumAge?: number;
+    timeout?: number;
+}
+
+interface ProgressEventInit extends EventInit {
+    lengthComputable?: boolean;
+    loaded?: number;
+    total?: number;
+}
+
+interface PushSubscriptionOptionsInit {
+    applicationServerKey?: any;
+    userVisibleOnly?: boolean;
+}
+
+interface RegistrationOptions {
+    scope?: string;
+}
+
+interface RequestInit {
+    body?: any;
+    cache?: RequestCache;
+    credentials?: RequestCredentials;
+    headers?: any;
+    integrity?: string;
+    keepalive?: boolean;
+    method?: string;
+    mode?: RequestMode;
+    redirect?: RequestRedirect;
+    referrer?: string;
+    referrerPolicy?: ReferrerPolicy;
+    window?: any;
+}
+
+interface ResponseInit {
+    headers?: any;
+    status?: number;
+    statusText?: string;
+}
+
+interface RTCConfiguration {
+    bundlePolicy?: RTCBundlePolicy;
+    iceServers?: RTCIceServer[];
+    iceTransportPolicy?: RTCIceTransportPolicy;
+    peerIdentity?: string;
+}
+
+interface RTCDtlsFingerprint {
+    algorithm?: string;
+    value?: string;
+}
+
+interface RTCDtlsParameters {
+    fingerprints?: RTCDtlsFingerprint[];
+    role?: RTCDtlsRole;
+}
+
+interface RTCDTMFToneChangeEventInit extends EventInit {
+    tone?: string;
+}
+
+interface RTCIceCandidateAttributes extends RTCStats {
+    addressSourceUrl?: string;
+    candidateType?: RTCStatsIceCandidateType;
+    ipAddress?: string;
+    portNumber?: number;
+    priority?: number;
+    transport?: string;
+}
+
+interface RTCIceCandidateComplete {
+}
+
+interface RTCIceCandidateDictionary {
+    foundation?: string;
+    ip?: string;
+    msMTurnSessionId?: string;
+    port?: number;
+    priority?: number;
+    protocol?: RTCIceProtocol;
+    relatedAddress?: string;
+    relatedPort?: number;
+    tcpType?: RTCIceTcpCandidateType;
+    type?: RTCIceCandidateType;
+}
+
+interface RTCIceCandidateInit {
+    candidate?: string;
+    sdpMid?: string;
+    sdpMLineIndex?: number;
+}
+
+interface RTCIceCandidatePair {
+    local?: RTCIceCandidateDictionary;
+    remote?: RTCIceCandidateDictionary;
+}
+
+interface RTCIceCandidatePairStats extends RTCStats {
+    availableIncomingBitrate?: number;
+    availableOutgoingBitrate?: number;
+    bytesReceived?: number;
+    bytesSent?: number;
+    localCandidateId?: string;
+    nominated?: boolean;
+    priority?: number;
+    readable?: boolean;
+    remoteCandidateId?: string;
+    roundTripTime?: number;
+    state?: RTCStatsIceCandidatePairState;
+    transportId?: string;
+    writable?: boolean;
+}
+
+interface RTCIceGatherOptions {
+    gatherPolicy?: RTCIceGatherPolicy;
+    iceservers?: RTCIceServer[];
+    portRange?: MSPortRange;
+}
+
+interface RTCIceParameters {
+    iceLite?: boolean;
+    password?: string;
+    usernameFragment?: string;
+}
+
+interface RTCIceServer {
+    credential?: string;
+    urls?: any;
+    username?: string;
+}
+
+interface RTCInboundRTPStreamStats extends RTCRTPStreamStats {
+    bytesReceived?: number;
+    fractionLost?: number;
+    jitter?: number;
+    packetsLost?: number;
+    packetsReceived?: number;
+}
+
+interface RTCMediaStreamTrackStats extends RTCStats {
+    audioLevel?: number;
+    echoReturnLoss?: number;
+    echoReturnLossEnhancement?: number;
+    frameHeight?: number;
+    framesCorrupted?: number;
+    framesDecoded?: number;
+    framesDropped?: number;
+    framesPerSecond?: number;
+    framesReceived?: number;
+    framesSent?: number;
+    frameWidth?: number;
+    remoteSource?: boolean;
+    ssrcIds?: string[];
+    trackIdentifier?: string;
+}
+
+interface RTCOfferOptions {
+    iceRestart?: boolean;
+    offerToReceiveAudio?: number;
+    offerToReceiveVideo?: number;
+    voiceActivityDetection?: boolean;
+}
+
+interface RTCOutboundRTPStreamStats extends RTCRTPStreamStats {
+    bytesSent?: number;
+    packetsSent?: number;
+    roundTripTime?: number;
+    targetBitrate?: number;
+}
+
+interface RTCPeerConnectionIceEventInit extends EventInit {
+    candidate?: RTCIceCandidate;
+}
+
+interface RTCRtcpFeedback {
+    parameter?: string;
+    type?: string;
+}
+
+interface RTCRtcpParameters {
+    cname?: string;
+    mux?: boolean;
+    reducedSize?: boolean;
+    ssrc?: number;
+}
+
+interface RTCRtpCapabilities {
+    codecs?: RTCRtpCodecCapability[];
+    fecMechanisms?: string[];
+    headerExtensions?: RTCRtpHeaderExtension[];
+}
+
+interface RTCRtpCodecCapability {
+    clockRate?: number;
+    kind?: string;
+    maxptime?: number;
+    maxSpatialLayers?: number;
+    maxTemporalLayers?: number;
+    name?: string;
+    numChannels?: number;
+    options?: any;
+    parameters?: any;
+    preferredPayloadType?: number;
+    ptime?: number;
+    rtcpFeedback?: RTCRtcpFeedback[];
+    svcMultiStreamSupport?: boolean;
+}
+
+interface RTCRtpCodecParameters {
+    clockRate?: number;
+    maxptime?: number;
+    name?: string;
+    numChannels?: number;
+    parameters?: any;
+    payloadType?: any;
+    ptime?: number;
+    rtcpFeedback?: RTCRtcpFeedback[];
+}
+
+interface RTCRtpContributingSource {
+    audioLevel?: number;
+    csrc?: number;
+    timestamp?: number;
+}
+
+interface RTCRtpEncodingParameters {
+    active?: boolean;
+    codecPayloadType?: number;
+    dependencyEncodingIds?: string[];
+    encodingId?: string;
+    fec?: RTCRtpFecParameters;
+    framerateScale?: number;
+    maxBitrate?: number;
+    maxFramerate?: number;
+    minQuality?: number;
+    priority?: number;
+    resolutionScale?: number;
+    rtx?: RTCRtpRtxParameters;
+    ssrc?: number;
+    ssrcRange?: RTCSsrcRange;
+}
+
+interface RTCRtpFecParameters {
+    mechanism?: string;
+    ssrc?: number;
+}
+
+interface RTCRtpHeaderExtension {
+    kind?: string;
+    preferredEncrypt?: boolean;
+    preferredId?: number;
+    uri?: string;
+}
+
+interface RTCRtpHeaderExtensionParameters {
+    encrypt?: boolean;
+    id?: number;
+    uri?: string;
+}
+
+interface RTCRtpParameters {
+    codecs?: RTCRtpCodecParameters[];
+    degradationPreference?: RTCDegradationPreference;
+    encodings?: RTCRtpEncodingParameters[];
+    headerExtensions?: RTCRtpHeaderExtensionParameters[];
+    muxId?: string;
+    rtcp?: RTCRtcpParameters;
+}
+
+interface RTCRtpRtxParameters {
+    ssrc?: number;
+}
+
+interface RTCRTPStreamStats extends RTCStats {
+    associateStatsId?: string;
+    codecId?: string;
+    firCount?: number;
+    isRemote?: boolean;
+    mediaTrackId?: string;
+    nackCount?: number;
+    pliCount?: number;
+    sliCount?: number;
+    ssrc?: string;
+    transportId?: string;
+}
+
+interface RTCRtpUnhandled {
+    muxId?: string;
+    payloadType?: number;
+    ssrc?: number;
+}
+
+interface RTCSessionDescriptionInit {
+    sdp?: string;
+    type?: RTCSdpType;
+}
+
+interface RTCSrtpKeyParam {
+    keyMethod?: string;
+    keySalt?: string;
+    lifetime?: string;
+    mkiLength?: number;
+    mkiValue?: number;
+}
+
+interface RTCSrtpSdesParameters {
+    cryptoSuite?: string;
+    keyParams?: RTCSrtpKeyParam[];
+    sessionParams?: string[];
+    tag?: number;
+}
+
+interface RTCSsrcRange {
+    max?: number;
+    min?: number;
+}
+
+interface RTCStats {
+    id?: string;
+    msType?: MSStatsType;
+    timestamp?: number;
+    type?: RTCStatsType;
+}
+
+interface RTCStatsReport {
+}
+
+interface RTCTransportStats extends RTCStats {
+    activeConnection?: boolean;
+    bytesReceived?: number;
+    bytesSent?: number;
+    localCertificateId?: string;
+    remoteCertificateId?: string;
+    rtcpTransportStatsId?: string;
+    selectedCandidatePairId?: string;
+}
+
+interface ScopedCredentialDescriptor {
+    id?: any;
+    transports?: Transport[];
+    type?: ScopedCredentialType;
+}
+
+interface ScopedCredentialOptions {
+    excludeList?: ScopedCredentialDescriptor[];
+    extensions?: WebAuthnExtensions;
+    rpId?: USVString;
+    timeoutSeconds?: number;
+}
+
+interface ScopedCredentialParameters {
+    algorithm?: string | Algorithm;
+    type?: ScopedCredentialType;
+}
+
+interface ServiceWorkerMessageEventInit extends EventInit {
+    data?: any;
+    lastEventId?: string;
+    origin?: string;
+    ports?: MessagePort[];
+    source?: ServiceWorker | MessagePort;
+}
+
+interface SpeechSynthesisEventInit extends EventInit {
+    charIndex?: number;
+    elapsedTime?: number;
+    name?: string;
+    utterance?: SpeechSynthesisUtterance;
+}
+
+interface StoreExceptionsInformation extends ExceptionInformation {
+    detailURI?: string;
+    explanationString?: string;
+    siteName?: string;
+}
+
+interface StoreSiteSpecificExceptionsInformation extends StoreExceptionsInformation {
+    arrayOfDomainStrings?: string[];
+}
+
+interface TrackEventInit extends EventInit {
+    track?: VideoTrack | AudioTrack | TextTrack;
+}
+
+interface TransitionEventInit extends EventInit {
+    elapsedTime?: number;
+    propertyName?: string;
+}
+
+interface UIEventInit extends EventInit {
+    detail?: number;
+    view?: Window;
+}
+
+interface WebAuthnExtensions {
+}
+
+interface WebGLContextAttributes {
+    failIfMajorPerformanceCaveat?: boolean;
+    alpha?: boolean;
+    antialias?: boolean;
+    depth?: boolean;
+    premultipliedAlpha?: boolean;
+    preserveDrawingBuffer?: boolean;
+    stencil?: boolean;
+}
+
+interface WebGLContextEventInit extends EventInit {
+    statusMessage?: string;
+}
+
+interface WheelEventInit extends MouseEventInit {
+    deltaMode?: number;
+    deltaX?: number;
+    deltaY?: number;
+    deltaZ?: number;
+}
+
+interface EventListener {
+    (evt: Event): void;
+}
+
+interface WebKitEntriesCallback {
+    (evt: Event): void;
+}
+
+interface WebKitErrorCallback {
+    (evt: Event): void;
+}
+
+interface WebKitFileCallback {
+    (evt: Event): void;
+}
+
+interface AnalyserNode extends AudioNode {
+    fftSize: number;
+    readonly frequencyBinCount: number;
+    maxDecibels: number;
+    minDecibels: number;
+    smoothingTimeConstant: number;
+    getByteFrequencyData(array: Uint8Array): void;
+    getByteTimeDomainData(array: Uint8Array): void;
+    getFloatFrequencyData(array: Float32Array): void;
+    getFloatTimeDomainData(array: Float32Array): void;
+}
+
+declare var AnalyserNode: {
+    prototype: AnalyserNode;
+    new(): AnalyserNode;
+};
+
+interface ANGLE_instanced_arrays {
+    drawArraysInstancedANGLE(mode: number, first: number, count: number, primcount: number): void;
+    drawElementsInstancedANGLE(mode: number, count: number, type: number, offset: number, primcount: number): void;
+    vertexAttribDivisorANGLE(index: number, divisor: number): void;
+    readonly VERTEX_ATTRIB_ARRAY_DIVISOR_ANGLE: number;
+}
+
+declare var ANGLE_instanced_arrays: {
+    prototype: ANGLE_instanced_arrays;
+    new(): ANGLE_instanced_arrays;
+    readonly VERTEX_ATTRIB_ARRAY_DIVISOR_ANGLE: number;
+};
+
+interface AnimationEvent extends Event {
+    readonly animationName: string;
+    readonly elapsedTime: number;
+    initAnimationEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, animationNameArg: string, elapsedTimeArg: number): void;
+}
+
+declare var AnimationEvent: {
+    prototype: AnimationEvent;
+    new(typeArg: string, eventInitDict?: AnimationEventInit): AnimationEvent;
+};
+
+interface ApplicationCacheEventMap {
+    "cached": Event;
+    "checking": Event;
+    "downloading": Event;
+    "error": Event;
+    "noupdate": Event;
+    "obsolete": Event;
+    "progress": ProgressEvent;
+    "updateready": Event;
+}
+
+interface ApplicationCache extends EventTarget {
+    oncached: (this: ApplicationCache, ev: Event) => any;
+    onchecking: (this: ApplicationCache, ev: Event) => any;
+    ondownloading: (this: ApplicationCache, ev: Event) => any;
+    onerror: (this: ApplicationCache, ev: Event) => any;
+    onnoupdate: (this: ApplicationCache, ev: Event) => any;
+    onobsolete: (this: ApplicationCache, ev: Event) => any;
+    onprogress: (this: ApplicationCache, ev: ProgressEvent) => any;
+    onupdateready: (this: ApplicationCache, ev: Event) => any;
+    readonly status: number;
+    abort(): void;
+    swapCache(): void;
+    update(): void;
+    readonly CHECKING: number;
+    readonly DOWNLOADING: number;
+    readonly IDLE: number;
+    readonly OBSOLETE: number;
+    readonly UNCACHED: number;
+    readonly UPDATEREADY: number;
+    addEventListener<K extends keyof ApplicationCacheEventMap>(type: K, listener: (this: ApplicationCache, ev: ApplicationCacheEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var ApplicationCache: {
+    prototype: ApplicationCache;
+    new(): ApplicationCache;
+    readonly CHECKING: number;
+    readonly DOWNLOADING: number;
+    readonly IDLE: number;
+    readonly OBSOLETE: number;
+    readonly UNCACHED: number;
+    readonly UPDATEREADY: number;
+};
+
+interface Attr extends Node {
+    readonly name: string;
+    readonly ownerElement: Element;
+    readonly prefix: string | null;
+    readonly specified: boolean;
+    value: string;
+}
+
+declare var Attr: {
+    prototype: Attr;
+    new(): Attr;
+};
+
+interface AudioBuffer {
+    readonly duration: number;
+    readonly length: number;
+    readonly numberOfChannels: number;
+    readonly sampleRate: number;
+    copyFromChannel(destination: Float32Array, channelNumber: number, startInChannel?: number): void;
+    copyToChannel(source: Float32Array, channelNumber: number, startInChannel?: number): void;
+    getChannelData(channel: number): Float32Array;
+}
+
+declare var AudioBuffer: {
+    prototype: AudioBuffer;
+    new(): AudioBuffer;
+};
+
+interface AudioBufferSourceNodeEventMap {
+    "ended": MediaStreamErrorEvent;
+}
+
+interface AudioBufferSourceNode extends AudioNode {
+    buffer: AudioBuffer | null;
+    readonly detune: AudioParam;
+    loop: boolean;
+    loopEnd: number;
+    loopStart: number;
+    onended: (this: AudioBufferSourceNode, ev: MediaStreamErrorEvent) => any;
+    readonly playbackRate: AudioParam;
+    start(when?: number, offset?: number, duration?: number): void;
+    stop(when?: number): void;
+    addEventListener<K extends keyof AudioBufferSourceNodeEventMap>(type: K, listener: (this: AudioBufferSourceNode, ev: AudioBufferSourceNodeEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var AudioBufferSourceNode: {
+    prototype: AudioBufferSourceNode;
+    new(): AudioBufferSourceNode;
+};
+
+interface AudioContextEventMap {
+    "statechange": Event;
+}
+
+interface AudioContextBase extends EventTarget {
+    readonly currentTime: number;
+    readonly destination: AudioDestinationNode;
+    readonly listener: AudioListener;
+    onstatechange: (this: AudioContext, ev: Event) => any;
+    readonly sampleRate: number;
+    readonly state: AudioContextState;
+    close(): Promise<void>;
+    createAnalyser(): AnalyserNode;
+    createBiquadFilter(): BiquadFilterNode;
+    createBuffer(numberOfChannels: number, length: number, sampleRate: number): AudioBuffer;
+    createBufferSource(): AudioBufferSourceNode;
+    createChannelMerger(numberOfInputs?: number): ChannelMergerNode;
+    createChannelSplitter(numberOfOutputs?: number): ChannelSplitterNode;
+    createConvolver(): ConvolverNode;
+    createDelay(maxDelayTime?: number): DelayNode;
+    createDynamicsCompressor(): DynamicsCompressorNode;
+    createGain(): GainNode;
+    createIIRFilter(feedforward: number[], feedback: number[]): IIRFilterNode;
+    createMediaElementSource(mediaElement: HTMLMediaElement): MediaElementAudioSourceNode;
+    createMediaStreamSource(mediaStream: MediaStream): MediaStreamAudioSourceNode;
+    createOscillator(): OscillatorNode;
+    createPanner(): PannerNode;
+    createPeriodicWave(real: Float32Array, imag: Float32Array, constraints?: PeriodicWaveConstraints): PeriodicWave;
+    createScriptProcessor(bufferSize?: number, numberOfInputChannels?: number, numberOfOutputChannels?: number): ScriptProcessorNode;
+    createStereoPanner(): StereoPannerNode;
+    createWaveShaper(): WaveShaperNode;
+    decodeAudioData(audioData: ArrayBuffer, successCallback?: DecodeSuccessCallback, errorCallback?: DecodeErrorCallback): Promise<AudioBuffer>;
+    resume(): Promise<void>;
+    addEventListener<K extends keyof AudioContextEventMap>(type: K, listener: (this: AudioContext, ev: AudioContextEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+interface AudioContext extends AudioContextBase {
+    suspend(): Promise<void>;
+}
+
+declare var AudioContext: {
+    prototype: AudioContext;
+    new(): AudioContext;
+};
+
+interface AudioDestinationNode extends AudioNode {
+    readonly maxChannelCount: number;
+}
+
+declare var AudioDestinationNode: {
+    prototype: AudioDestinationNode;
+    new(): AudioDestinationNode;
+};
+
+interface AudioListener {
+    dopplerFactor: number;
+    speedOfSound: number;
+    setOrientation(x: number, y: number, z: number, xUp: number, yUp: number, zUp: number): void;
+    setPosition(x: number, y: number, z: number): void;
+    setVelocity(x: number, y: number, z: number): void;
+}
+
+declare var AudioListener: {
+    prototype: AudioListener;
+    new(): AudioListener;
+};
+
+interface AudioNode extends EventTarget {
+    channelCount: number;
+    channelCountMode: ChannelCountMode;
+    channelInterpretation: ChannelInterpretation;
+    readonly context: AudioContext;
+    readonly numberOfInputs: number;
+    readonly numberOfOutputs: number;
+    connect(destination: AudioNode, output?: number, input?: number): AudioNode;
+    connect(destination: AudioParam, output?: number): void;
+    disconnect(output?: number): void;
+    disconnect(destination: AudioNode, output?: number, input?: number): void;
+    disconnect(destination: AudioParam, output?: number): void;
+}
+
+declare var AudioNode: {
+    prototype: AudioNode;
+    new(): AudioNode;
+};
+
+interface AudioParam {
+    readonly defaultValue: number;
+    value: number;
+    cancelScheduledValues(startTime: number): AudioParam;
+    exponentialRampToValueAtTime(value: number, endTime: number): AudioParam;
+    linearRampToValueAtTime(value: number, endTime: number): AudioParam;
+    setTargetAtTime(target: number, startTime: number, timeConstant: number): AudioParam;
+    setValueAtTime(value: number, startTime: number): AudioParam;
+    setValueCurveAtTime(values: Float32Array, startTime: number, duration: number): AudioParam;
+}
+
+declare var AudioParam: {
+    prototype: AudioParam;
+    new(): AudioParam;
+};
+
+interface AudioProcessingEvent extends Event {
+    readonly inputBuffer: AudioBuffer;
+    readonly outputBuffer: AudioBuffer;
+    readonly playbackTime: number;
+}
+
+declare var AudioProcessingEvent: {
+    prototype: AudioProcessingEvent;
+    new(): AudioProcessingEvent;
+};
+
+interface AudioTrack {
+    enabled: boolean;
+    readonly id: string;
+    kind: string;
+    readonly label: string;
+    language: string;
+    readonly sourceBuffer: SourceBuffer;
+}
+
+declare var AudioTrack: {
+    prototype: AudioTrack;
+    new(): AudioTrack;
+};
+
+interface AudioTrackListEventMap {
+    "addtrack": TrackEvent;
+    "change": Event;
+    "removetrack": TrackEvent;
+}
+
+interface AudioTrackList extends EventTarget {
+    readonly length: number;
+    onaddtrack: (this: AudioTrackList, ev: TrackEvent) => any;
+    onchange: (this: AudioTrackList, ev: Event) => any;
+    onremovetrack: (this: AudioTrackList, ev: TrackEvent) => any;
+    getTrackById(id: string): AudioTrack | null;
+    item(index: number): AudioTrack;
+    addEventListener<K extends keyof AudioTrackListEventMap>(type: K, listener: (this: AudioTrackList, ev: AudioTrackListEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+    [index: number]: AudioTrack;
+}
+
+declare var AudioTrackList: {
+    prototype: AudioTrackList;
+    new(): AudioTrackList;
+};
+
+interface BarProp {
+    readonly visible: boolean;
+}
+
+declare var BarProp: {
+    prototype: BarProp;
+    new(): BarProp;
+};
+
+interface BeforeUnloadEvent extends Event {
+    returnValue: any;
+}
+
+declare var BeforeUnloadEvent: {
+    prototype: BeforeUnloadEvent;
+    new(): BeforeUnloadEvent;
+};
+
+interface BiquadFilterNode extends AudioNode {
+    readonly detune: AudioParam;
+    readonly frequency: AudioParam;
+    readonly gain: AudioParam;
+    readonly Q: AudioParam;
+    type: BiquadFilterType;
+    getFrequencyResponse(frequencyHz: Float32Array, magResponse: Float32Array, phaseResponse: Float32Array): void;
+}
+
+declare var BiquadFilterNode: {
+    prototype: BiquadFilterNode;
+    new(): BiquadFilterNode;
+};
+
+interface Blob {
+    readonly size: number;
+    readonly type: string;
+    msClose(): void;
+    msDetachStream(): any;
+    slice(start?: number, end?: number, contentType?: string): Blob;
+}
+
+declare var Blob: {
+    prototype: Blob;
+    new (blobParts?: any[], options?: BlobPropertyBag): Blob;
+};
+
+interface Cache {
+    add(request: RequestInfo): Promise<void>;
+    addAll(requests: RequestInfo[]): Promise<void>;
+    delete(request: RequestInfo, options?: CacheQueryOptions): Promise<boolean>;
+    keys(request?: RequestInfo, options?: CacheQueryOptions): any;
+    match(request: RequestInfo, options?: CacheQueryOptions): Promise<Response>;
+    matchAll(request?: RequestInfo, options?: CacheQueryOptions): any;
+    put(request: RequestInfo, response: Response): Promise<void>;
+}
+
+declare var Cache: {
+    prototype: Cache;
+    new(): Cache;
+};
+
+interface CacheStorage {
+    delete(cacheName: string): Promise<boolean>;
+    has(cacheName: string): Promise<boolean>;
+    keys(): any;
+    match(request: RequestInfo, options?: CacheQueryOptions): Promise<any>;
+    open(cacheName: string): Promise<Cache>;
+}
+
+declare var CacheStorage: {
+    prototype: CacheStorage;
+    new(): CacheStorage;
+};
+
+interface CanvasGradient {
+    addColorStop(offset: number, color: string): void;
+}
+
+declare var CanvasGradient: {
+    prototype: CanvasGradient;
+    new(): CanvasGradient;
+};
+
+interface CanvasPattern {
+    setTransform(matrix: SVGMatrix): void;
+}
+
+declare var CanvasPattern: {
+    prototype: CanvasPattern;
+    new(): CanvasPattern;
+};
+
+interface CanvasRenderingContext2D extends Object, CanvasPathMethods {
+    readonly canvas: HTMLCanvasElement;
+    fillStyle: string | CanvasGradient | CanvasPattern;
+    font: string;
+    globalAlpha: number;
+    globalCompositeOperation: string;
+    imageSmoothingEnabled: boolean;
+    lineCap: string;
+    lineDashOffset: number;
+    lineJoin: string;
+    lineWidth: number;
+    miterLimit: number;
+    msFillRule: CanvasFillRule;
+    shadowBlur: number;
+    shadowColor: string;
+    shadowOffsetX: number;
+    shadowOffsetY: number;
+    strokeStyle: string | CanvasGradient | CanvasPattern;
+    textAlign: string;
+    textBaseline: string;
+    mozImageSmoothingEnabled: boolean;
+    webkitImageSmoothingEnabled: boolean;
+    oImageSmoothingEnabled: boolean;
+    beginPath(): void;
+    clearRect(x: number, y: number, w: number, h: number): void;
+    clip(fillRule?: CanvasFillRule): void;
+    createImageData(imageDataOrSw: number | ImageData, sh?: number): ImageData;
+    createLinearGradient(x0: number, y0: number, x1: number, y1: number): CanvasGradient;
+    createPattern(image: HTMLImageElement | HTMLCanvasElement | HTMLVideoElement, repetition: string): CanvasPattern;
+    createRadialGradient(x0: number, y0: number, r0: number, x1: number, y1: number, r1: number): CanvasGradient;
+    drawFocusIfNeeded(element: Element): void;
+    drawImage(image: HTMLImageElement | HTMLCanvasElement | HTMLVideoElement | ImageBitmap, dstX: number, dstY: number): void;
+    drawImage(image: HTMLImageElement | HTMLCanvasElement | HTMLVideoElement | ImageBitmap, dstX: number, dstY: number, dstW: number, dstH: number): void;
+    drawImage(image: HTMLImageElement | HTMLCanvasElement | HTMLVideoElement | ImageBitmap, srcX: number, srcY: number, srcW: number, srcH: number, dstX: number, dstY: number, dstW: number, dstH: number): void;
+    fill(fillRule?: CanvasFillRule): void;
+    fillRect(x: number, y: number, w: number, h: number): void;
+    fillText(text: string, x: number, y: number, maxWidth?: number): void;
+    getImageData(sx: number, sy: number, sw: number, sh: number): ImageData;
+    getLineDash(): number[];
+    isPointInPath(x: number, y: number, fillRule?: CanvasFillRule): boolean;
+    measureText(text: string): TextMetrics;
+    putImageData(imagedata: ImageData, dx: number, dy: number, dirtyX?: number, dirtyY?: number, dirtyWidth?: number, dirtyHeight?: number): void;
+    restore(): void;
+    rotate(angle: number): void;
+    save(): void;
+    scale(x: number, y: number): void;
+    setLineDash(segments: number[]): void;
+    setTransform(m11: number, m12: number, m21: number, m22: number, dx: number, dy: number): void;
+    stroke(path?: Path2D): void;
+    strokeRect(x: number, y: number, w: number, h: number): void;
+    strokeText(text: string, x: number, y: number, maxWidth?: number): void;
+    transform(m11: number, m12: number, m21: number, m22: number, dx: number, dy: number): void;
+    translate(x: number, y: number): void;
+}
+
+declare var CanvasRenderingContext2D: {
+    prototype: CanvasRenderingContext2D;
+    new(): CanvasRenderingContext2D;
+};
+
+interface CDATASection extends Text {
+}
+
+declare var CDATASection: {
+    prototype: CDATASection;
+    new(): CDATASection;
+};
+
+interface ChannelMergerNode extends AudioNode {
+}
+
+declare var ChannelMergerNode: {
+    prototype: ChannelMergerNode;
+    new(): ChannelMergerNode;
+};
+
+interface ChannelSplitterNode extends AudioNode {
+}
+
+declare var ChannelSplitterNode: {
+    prototype: ChannelSplitterNode;
+    new(): ChannelSplitterNode;
+};
+
+interface CharacterData extends Node, ChildNode {
+    data: string;
+    readonly length: number;
+    appendData(arg: string): void;
+    deleteData(offset: number, count: number): void;
+    insertData(offset: number, arg: string): void;
+    replaceData(offset: number, count: number, arg: string): void;
+    substringData(offset: number, count: number): string;
+}
+
+declare var CharacterData: {
+    prototype: CharacterData;
+    new(): CharacterData;
+};
+
+interface ClientRect {
+    bottom: number;
+    readonly height: number;
+    left: number;
+    right: number;
+    top: number;
+    readonly width: number;
+}
+
+declare var ClientRect: {
+    prototype: ClientRect;
+    new(): ClientRect;
+};
+
+interface ClientRectList {
+    readonly length: number;
+    item(index: number): ClientRect;
+    [index: number]: ClientRect;
+}
+
+declare var ClientRectList: {
+    prototype: ClientRectList;
+    new(): ClientRectList;
+};
+
+interface ClipboardEvent extends Event {
+    readonly clipboardData: DataTransfer;
+}
+
+declare var ClipboardEvent: {
+    prototype: ClipboardEvent;
+    new(type: string, eventInitDict?: ClipboardEventInit): ClipboardEvent;
+};
+
+interface CloseEvent extends Event {
+    readonly code: number;
+    readonly reason: string;
+    readonly wasClean: boolean;
+    initCloseEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, wasCleanArg: boolean, codeArg: number, reasonArg: string): void;
+}
+
+declare var CloseEvent: {
+    prototype: CloseEvent;
+    new(typeArg: string, eventInitDict?: CloseEventInit): CloseEvent;
+};
+
+interface Comment extends CharacterData {
+    text: string;
+}
+
+declare var Comment: {
+    prototype: Comment;
+    new(): Comment;
+};
+
+interface CompositionEvent extends UIEvent {
+    readonly data: string;
+    readonly locale: string;
+    initCompositionEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, dataArg: string, locale: string): void;
+}
+
+declare var CompositionEvent: {
+    prototype: CompositionEvent;
+    new(typeArg: string, eventInitDict?: CompositionEventInit): CompositionEvent;
+};
+
+interface Console {
+    assert(test?: boolean, message?: string, ...optionalParams: any[]): void;
+    clear(): void;
+    count(countTitle?: string): void;
+    debug(message?: any, ...optionalParams: any[]): void;
+    dir(value?: any, ...optionalParams: any[]): void;
+    dirxml(value: any): void;
+    error(message?: any, ...optionalParams: any[]): void;
+    exception(message?: string, ...optionalParams: any[]): void;
+    group(groupTitle?: string, ...optionalParams: any[]): void;
+    groupCollapsed(groupTitle?: string, ...optionalParams: any[]): void;
+    groupEnd(): void;
+    info(message?: any, ...optionalParams: any[]): void;
+    log(message?: any, ...optionalParams: any[]): void;
+    msIsIndependentlyComposed(element: Element): boolean;
+    profile(reportName?: string): void;
+    profileEnd(): void;
+    select(element: Element): void;
+    table(...data: any[]): void;
+    time(timerName?: string): void;
+    timeEnd(timerName?: string): void;
+    trace(message?: any, ...optionalParams: any[]): void;
+    warn(message?: any, ...optionalParams: any[]): void;
+}
+
+declare var Console: {
+    prototype: Console;
+    new(): Console;
+};
+
+interface ConvolverNode extends AudioNode {
+    buffer: AudioBuffer | null;
+    normalize: boolean;
+}
+
+declare var ConvolverNode: {
+    prototype: ConvolverNode;
+    new(): ConvolverNode;
+};
+
+interface Coordinates {
+    readonly accuracy: number;
+    readonly altitude: number | null;
+    readonly altitudeAccuracy: number | null;
+    readonly heading: number | null;
+    readonly latitude: number;
+    readonly longitude: number;
+    readonly speed: number | null;
+}
+
+declare var Coordinates: {
+    prototype: Coordinates;
+    new(): Coordinates;
+};
+
+interface Crypto extends Object, RandomSource {
+    readonly subtle: SubtleCrypto;
+}
+
+declare var Crypto: {
+    prototype: Crypto;
+    new(): Crypto;
+};
+
+interface CryptoKey {
+    readonly algorithm: KeyAlgorithm;
+    readonly extractable: boolean;
+    readonly type: string;
+    readonly usages: string[];
+}
+
+declare var CryptoKey: {
+    prototype: CryptoKey;
+    new(): CryptoKey;
+};
+
+interface CryptoKeyPair {
+    privateKey: CryptoKey;
+    publicKey: CryptoKey;
+}
+
+declare var CryptoKeyPair: {
+    prototype: CryptoKeyPair;
+    new(): CryptoKeyPair;
+};
+
+interface CSS {
+    supports(property: string, value?: string): boolean;
+}
+declare var CSS: CSS;
+
+interface CSSConditionRule extends CSSGroupingRule {
+    conditionText: string;
+}
+
+declare var CSSConditionRule: {
+    prototype: CSSConditionRule;
+    new(): CSSConditionRule;
+};
+
+interface CSSFontFaceRule extends CSSRule {
+    readonly style: CSSStyleDeclaration;
+}
+
+declare var CSSFontFaceRule: {
+    prototype: CSSFontFaceRule;
+    new(): CSSFontFaceRule;
+};
+
+interface CSSGroupingRule extends CSSRule {
+    readonly cssRules: CSSRuleList;
+    deleteRule(index: number): void;
+    insertRule(rule: string, index: number): number;
+}
+
+declare var CSSGroupingRule: {
+    prototype: CSSGroupingRule;
+    new(): CSSGroupingRule;
+};
+
+interface CSSImportRule extends CSSRule {
+    readonly href: string;
+    readonly media: MediaList;
+    readonly styleSheet: CSSStyleSheet;
+}
+
+declare var CSSImportRule: {
+    prototype: CSSImportRule;
+    new(): CSSImportRule;
+};
+
+interface CSSKeyframeRule extends CSSRule {
+    keyText: string;
+    readonly style: CSSStyleDeclaration;
+}
+
+declare var CSSKeyframeRule: {
+    prototype: CSSKeyframeRule;
+    new(): CSSKeyframeRule;
+};
+
+interface CSSKeyframesRule extends CSSRule {
+    readonly cssRules: CSSRuleList;
+    name: string;
+    appendRule(rule: string): void;
+    deleteRule(rule: string): void;
+    findRule(rule: string): CSSKeyframeRule;
+}
+
+declare var CSSKeyframesRule: {
+    prototype: CSSKeyframesRule;
+    new(): CSSKeyframesRule;
+};
+
+interface CSSMediaRule extends CSSConditionRule {
+    readonly media: MediaList;
+}
+
+declare var CSSMediaRule: {
+    prototype: CSSMediaRule;
+    new(): CSSMediaRule;
+};
+
+interface CSSNamespaceRule extends CSSRule {
+    readonly namespaceURI: string;
+    readonly prefix: string;
+}
+
+declare var CSSNamespaceRule: {
+    prototype: CSSNamespaceRule;
+    new(): CSSNamespaceRule;
+};
+
+interface CSSPageRule extends CSSRule {
+    readonly pseudoClass: string;
+    readonly selector: string;
+    selectorText: string;
+    readonly style: CSSStyleDeclaration;
+}
+
+declare var CSSPageRule: {
+    prototype: CSSPageRule;
+    new(): CSSPageRule;
+};
+
+interface CSSRule {
+    cssText: string;
+    readonly parentRule: CSSRule;
+    readonly parentStyleSheet: CSSStyleSheet;
+    readonly type: number;
+    readonly CHARSET_RULE: number;
+    readonly FONT_FACE_RULE: number;
+    readonly IMPORT_RULE: number;
+    readonly KEYFRAME_RULE: number;
+    readonly KEYFRAMES_RULE: number;
+    readonly MEDIA_RULE: number;
+    readonly NAMESPACE_RULE: number;
+    readonly PAGE_RULE: number;
+    readonly STYLE_RULE: number;
+    readonly SUPPORTS_RULE: number;
+    readonly UNKNOWN_RULE: number;
+    readonly VIEWPORT_RULE: number;
+}
+
+declare var CSSRule: {
+    prototype: CSSRule;
+    new(): CSSRule;
+    readonly CHARSET_RULE: number;
+    readonly FONT_FACE_RULE: number;
+    readonly IMPORT_RULE: number;
+    readonly KEYFRAME_RULE: number;
+    readonly KEYFRAMES_RULE: number;
+    readonly MEDIA_RULE: number;
+    readonly NAMESPACE_RULE: number;
+    readonly PAGE_RULE: number;
+    readonly STYLE_RULE: number;
+    readonly SUPPORTS_RULE: number;
+    readonly UNKNOWN_RULE: number;
+    readonly VIEWPORT_RULE: number;
+};
+
+interface CSSRuleList {
+    readonly length: number;
+    item(index: number): CSSRule;
+    [index: number]: CSSRule;
+}
+
+declare var CSSRuleList: {
+    prototype: CSSRuleList;
+    new(): CSSRuleList;
+};
+
+interface CSSStyleDeclaration {
+    alignContent: string | null;
+    alignItems: string | null;
+    alignmentBaseline: string | null;
+    alignSelf: string | null;
+    animation: string | null;
+    animationDelay: string | null;
+    animationDirection: string | null;
+    animationDuration: string | null;
+    animationFillMode: string | null;
+    animationIterationCount: string | null;
+    animationName: string | null;
+    animationPlayState: string | null;
+    animationTimingFunction: string | null;
+    backfaceVisibility: string | null;
+    background: string | null;
+    backgroundAttachment: string | null;
+    backgroundClip: string | null;
+    backgroundColor: string | null;
+    backgroundImage: string | null;
+    backgroundOrigin: string | null;
+    backgroundPosition: string | null;
+    backgroundPositionX: string | null;
+    backgroundPositionY: string | null;
+    backgroundRepeat: string | null;
+    backgroundSize: string | null;
+    baselineShift: string | null;
+    border: string | null;
+    borderBottom: string | null;
+    borderBottomColor: string | null;
+    borderBottomLeftRadius: string | null;
+    borderBottomRightRadius: string | null;
+    borderBottomStyle: string | null;
+    borderBottomWidth: string | null;
+    borderCollapse: string | null;
+    borderColor: string | null;
+    borderImage: string | null;
+    borderImageOutset: string | null;
+    borderImageRepeat: string | null;
+    borderImageSlice: string | null;
+    borderImageSource: string | null;
+    borderImageWidth: string | null;
+    borderLeft: string | null;
+    borderLeftColor: string | null;
+    borderLeftStyle: string | null;
+    borderLeftWidth: string | null;
+    borderRadius: string | null;
+    borderRight: string | null;
+    borderRightColor: string | null;
+    borderRightStyle: string | null;
+    borderRightWidth: string | null;
+    borderSpacing: string | null;
+    borderStyle: string | null;
+    borderTop: string | null;
+    borderTopColor: string | null;
+    borderTopLeftRadius: string | null;
+    borderTopRightRadius: string | null;
+    borderTopStyle: string | null;
+    borderTopWidth: string | null;
+    borderWidth: string | null;
+    bottom: string | null;
+    boxShadow: string | null;
+    boxSizing: string | null;
+    breakAfter: string | null;
+    breakBefore: string | null;
+    breakInside: string | null;
+    captionSide: string | null;
+    clear: string | null;
+    clip: string | null;
+    clipPath: string | null;
+    clipRule: string | null;
+    color: string | null;
+    colorInterpolationFilters: string | null;
+    columnCount: any;
+    columnFill: string | null;
+    columnGap: any;
+    columnRule: string | null;
+    columnRuleColor: any;
+    columnRuleStyle: string | null;
+    columnRuleWidth: any;
+    columns: string | null;
+    columnSpan: string | null;
+    columnWidth: any;
+    content: string | null;
+    counterIncrement: string | null;
+    counterReset: string | null;
+    cssFloat: string | null;
+    cssText: string;
+    cursor: string | null;
+    direction: string | null;
+    display: string | null;
+    dominantBaseline: string | null;
+    emptyCells: string | null;
+    enableBackground: string | null;
+    fill: string | null;
+    fillOpacity: string | null;
+    fillRule: string | null;
+    filter: string | null;
+    flex: string | null;
+    flexBasis: string | null;
+    flexDirection: string | null;
+    flexFlow: string | null;
+    flexGrow: string | null;
+    flexShrink: string | null;
+    flexWrap: string | null;
+    floodColor: string | null;
+    floodOpacity: string | null;
+    font: string | null;
+    fontFamily: string | null;
+    fontFeatureSettings: string | null;
+    fontSize: string | null;
+    fontSizeAdjust: string | null;
+    fontStretch: string | null;
+    fontStyle: string | null;
+    fontVariant: string | null;
+    fontWeight: string | null;
+    glyphOrientationHorizontal: string | null;
+    glyphOrientationVertical: string | null;
+    height: string | null;
+    imeMode: string | null;
+    justifyContent: string | null;
+    kerning: string | null;
+    layoutGrid: string | null;
+    layoutGridChar: string | null;
+    layoutGridLine: string | null;
+    layoutGridMode: string | null;
+    layoutGridType: string | null;
+    left: string | null;
+    readonly length: number;
+    letterSpacing: string | null;
+    lightingColor: string | null;
+    lineBreak: string | null;
+    lineHeight: string | null;
+    listStyle: string | null;
+    listStyleImage: string | null;
+    listStylePosition: string | null;
+    listStyleType: string | null;
+    margin: string | null;
+    marginBottom: string | null;
+    marginLeft: string | null;
+    marginRight: string | null;
+    marginTop: string | null;
+    marker: string | null;
+    markerEnd: string | null;
+    markerMid: string | null;
+    markerStart: string | null;
+    mask: string | null;
+    maxHeight: string | null;
+    maxWidth: string | null;
+    minHeight: string | null;
+    minWidth: string | null;
+    msContentZoomChaining: string | null;
+    msContentZooming: string | null;
+    msContentZoomLimit: string | null;
+    msContentZoomLimitMax: any;
+    msContentZoomLimitMin: any;
+    msContentZoomSnap: string | null;
+    msContentZoomSnapPoints: string | null;
+    msContentZoomSnapType: string | null;
+    msFlowFrom: string | null;
+    msFlowInto: string | null;
+    msFontFeatureSettings: string | null;
+    msGridColumn: any;
+    msGridColumnAlign: string | null;
+    msGridColumns: string | null;
+    msGridColumnSpan: any;
+    msGridRow: any;
+    msGridRowAlign: string | null;
+    msGridRows: string | null;
+    msGridRowSpan: any;
+    msHighContrastAdjust: string | null;
+    msHyphenateLimitChars: string | null;
+    msHyphenateLimitLines: any;
+    msHyphenateLimitZone: any;
+    msHyphens: string | null;
+    msImeAlign: string | null;
+    msOverflowStyle: string | null;
+    msScrollChaining: string | null;
+    msScrollLimit: string | null;
+    msScrollLimitXMax: any;
+    msScrollLimitXMin: any;
+    msScrollLimitYMax: any;
+    msScrollLimitYMin: any;
+    msScrollRails: string | null;
+    msScrollSnapPointsX: string | null;
+    msScrollSnapPointsY: string | null;
+    msScrollSnapType: string | null;
+    msScrollSnapX: string | null;
+    msScrollSnapY: string | null;
+    msScrollTranslation: string | null;
+    msTextCombineHorizontal: string | null;
+    msTextSizeAdjust: any;
+    msTouchAction: string | null;
+    msTouchSelect: string | null;
+    msUserSelect: string | null;
+    msWrapFlow: string;
+    msWrapMargin: any;
+    msWrapThrough: string;
+    opacity: string | null;
+    order: string | null;
+    orphans: string | null;
+    outline: string | null;
+    outlineColor: string | null;
+    outlineOffset: string | null;
+    outlineStyle: string | null;
+    outlineWidth: string | null;
+    overflow: string | null;
+    overflowX: string | null;
+    overflowY: string | null;
+    padding: string | null;
+    paddingBottom: string | null;
+    paddingLeft: string | null;
+    paddingRight: string | null;
+    paddingTop: string | null;
+    pageBreakAfter: string | null;
+    pageBreakBefore: string | null;
+    pageBreakInside: string | null;
+    readonly parentRule: CSSRule;
+    perspective: string | null;
+    perspectiveOrigin: string | null;
+    pointerEvents: string | null;
+    position: string | null;
+    quotes: string | null;
+    right: string | null;
+    rotate: string | null;
+    rubyAlign: string | null;
+    rubyOverhang: string | null;
+    rubyPosition: string | null;
+    scale: string | null;
+    stopColor: string | null;
+    stopOpacity: string | null;
+    stroke: string | null;
+    strokeDasharray: string | null;
+    strokeDashoffset: string | null;
+    strokeLinecap: string | null;
+    strokeLinejoin: string | null;
+    strokeMiterlimit: string | null;
+    strokeOpacity: string | null;
+    strokeWidth: string | null;
+    tableLayout: string | null;
+    textAlign: string | null;
+    textAlignLast: string | null;
+    textAnchor: string | null;
+    textDecoration: string | null;
+    textIndent: string | null;
+    textJustify: string | null;
+    textKashida: string | null;
+    textKashidaSpace: string | null;
+    textOverflow: string | null;
+    textShadow: string | null;
+    textTransform: string | null;
+    textUnderlinePosition: string | null;
+    top: string | null;
+    touchAction: string | null;
+    transform: string | null;
+    transformOrigin: string | null;
+    transformStyle: string | null;
+    transition: string | null;
+    transitionDelay: string | null;
+    transitionDuration: string | null;
+    transitionProperty: string | null;
+    transitionTimingFunction: string | null;
+    translate: string | null;
+    unicodeBidi: string | null;
+    verticalAlign: string | null;
+    visibility: string | null;
+    webkitAlignContent: string | null;
+    webkitAlignItems: string | null;
+    webkitAlignSelf: string | null;
+    webkitAnimation: string | null;
+    webkitAnimationDelay: string | null;
+    webkitAnimationDirection: string | null;
+    webkitAnimationDuration: string | null;
+    webkitAnimationFillMode: string | null;
+    webkitAnimationIterationCount: string | null;
+    webkitAnimationName: string | null;
+    webkitAnimationPlayState: string | null;
+    webkitAnimationTimingFunction: string | null;
+    webkitAppearance: string | null;
+    webkitBackfaceVisibility: string | null;
+    webkitBackgroundClip: string | null;
+    webkitBackgroundOrigin: string | null;
+    webkitBackgroundSize: string | null;
+    webkitBorderBottomLeftRadius: string | null;
+    webkitBorderBottomRightRadius: string | null;
+    webkitBorderImage: string | null;
+    webkitBorderRadius: string | null;
+    webkitBorderTopLeftRadius: string | null;
+    webkitBorderTopRightRadius: string | null;
+    webkitBoxAlign: string | null;
+    webkitBoxDirection: string | null;
+    webkitBoxFlex: string | null;
+    webkitBoxOrdinalGroup: string | null;
+    webkitBoxOrient: string | null;
+    webkitBoxPack: string | null;
+    webkitBoxSizing: string | null;
+    webkitColumnBreakAfter: string | null;
+    webkitColumnBreakBefore: string | null;
+    webkitColumnBreakInside: string | null;
+    webkitColumnCount: any;
+    webkitColumnGap: any;
+    webkitColumnRule: string | null;
+    webkitColumnRuleColor: any;
+    webkitColumnRuleStyle: string | null;
+    webkitColumnRuleWidth: any;
+    webkitColumns: string | null;
+    webkitColumnSpan: string | null;
+    webkitColumnWidth: any;
+    webkitFilter: string | null;
+    webkitFlex: string | null;
+    webkitFlexBasis: string | null;
+    webkitFlexDirection: string | null;
+    webkitFlexFlow: string | null;
+    webkitFlexGrow: string | null;
+    webkitFlexShrink: string | null;
+    webkitFlexWrap: string | null;
+    webkitJustifyContent: string | null;
+    webkitOrder: string | null;
+    webkitPerspective: string | null;
+    webkitPerspectiveOrigin: string | null;
+    webkitTapHighlightColor: string | null;
+    webkitTextFillColor: string | null;
+    webkitTextSizeAdjust: any;
+    webkitTextStroke: string | null;
+    webkitTextStrokeColor: string | null;
+    webkitTextStrokeWidth: string | null;
+    webkitTransform: string | null;
+    webkitTransformOrigin: string | null;
+    webkitTransformStyle: string | null;
+    webkitTransition: string | null;
+    webkitTransitionDelay: string | null;
+    webkitTransitionDuration: string | null;
+    webkitTransitionProperty: string | null;
+    webkitTransitionTimingFunction: string | null;
+    webkitUserModify: string | null;
+    webkitUserSelect: string | null;
+    webkitWritingMode: string | null;
+    whiteSpace: string | null;
+    widows: string | null;
+    width: string | null;
+    wordBreak: string | null;
+    wordSpacing: string | null;
+    wordWrap: string | null;
+    writingMode: string | null;
+    zIndex: string | null;
+    zoom: string | null;
+    resize: string | null;
+    userSelect: string | null;
+    getPropertyPriority(propertyName: string): string;
+    getPropertyValue(propertyName: string): string;
+    item(index: number): string;
+    removeProperty(propertyName: string): string;
+    setProperty(propertyName: string, value: string | null, priority?: string): void;
+    [index: number]: string;
+}
+
+declare var CSSStyleDeclaration: {
+    prototype: CSSStyleDeclaration;
+    new(): CSSStyleDeclaration;
+};
+
+interface CSSStyleRule extends CSSRule {
+    readonly readOnly: boolean;
+    selectorText: string;
+    readonly style: CSSStyleDeclaration;
+}
+
+declare var CSSStyleRule: {
+    prototype: CSSStyleRule;
+    new(): CSSStyleRule;
+};
+
+interface CSSStyleSheet extends StyleSheet {
+    readonly cssRules: CSSRuleList;
+    cssText: string;
+    readonly id: string;
+    readonly imports: StyleSheetList;
+    readonly isAlternate: boolean;
+    readonly isPrefAlternate: boolean;
+    readonly ownerRule: CSSRule;
+    readonly owningElement: Element;
+    readonly pages: StyleSheetPageList;
+    readonly readOnly: boolean;
+    readonly rules: CSSRuleList;
+    addImport(bstrURL: string, lIndex?: number): number;
+    addPageRule(bstrSelector: string, bstrStyle: string, lIndex?: number): number;
+    addRule(bstrSelector: string, bstrStyle?: string, lIndex?: number): number;
+    deleteRule(index?: number): void;
+    insertRule(rule: string, index?: number): number;
+    removeImport(lIndex: number): void;
+    removeRule(lIndex: number): void;
+}
+
+declare var CSSStyleSheet: {
+    prototype: CSSStyleSheet;
+    new(): CSSStyleSheet;
+};
+
+interface CSSSupportsRule extends CSSConditionRule {
+}
+
+declare var CSSSupportsRule: {
+    prototype: CSSSupportsRule;
+    new(): CSSSupportsRule;
+};
+
+interface CustomEvent extends Event {
+    readonly detail: any;
+    initCustomEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, detailArg: any): void;
+}
+
+declare var CustomEvent: {
+    prototype: CustomEvent;
+    new(typeArg: string, eventInitDict?: CustomEventInit): CustomEvent;
+};
+
+interface DataCue extends TextTrackCue {
+    data: ArrayBuffer;
+    addEventListener<K extends keyof TextTrackCueEventMap>(type: K, listener: (this: DataCue, ev: TextTrackCueEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var DataCue: {
+    prototype: DataCue;
+    new(): DataCue;
+};
+
+interface DataTransfer {
+    dropEffect: string;
+    effectAllowed: string;
+    readonly files: FileList;
+    readonly items: DataTransferItemList;
+    readonly types: string[];
+    clearData(format?: string): boolean;
+    getData(format: string): string;
+    setData(format: string, data: string): boolean;
+    setDragImage(image: Element, x: number, y: number): void;
+}
+
+declare var DataTransfer: {
+    prototype: DataTransfer;
+    new(): DataTransfer;
+};
+
+interface DataTransferItem {
+    readonly kind: string;
+    readonly type: string;
+    getAsFile(): File | null;
+    getAsString(_callback: FunctionStringCallback | null): void;
+    webkitGetAsEntry(): any;
+}
+
+declare var DataTransferItem: {
+    prototype: DataTransferItem;
+    new(): DataTransferItem;
+};
+
+interface DataTransferItemList {
+    readonly length: number;
+    add(data: File): DataTransferItem | null;
+    clear(): void;
+    item(index: number): DataTransferItem;
+    remove(index: number): void;
+    [index: number]: DataTransferItem;
+}
+
+declare var DataTransferItemList: {
+    prototype: DataTransferItemList;
+    new(): DataTransferItemList;
+};
+
+interface DeferredPermissionRequest {
+    readonly id: number;
+    readonly type: MSWebViewPermissionType;
+    readonly uri: string;
+    allow(): void;
+    deny(): void;
+}
+
+declare var DeferredPermissionRequest: {
+    prototype: DeferredPermissionRequest;
+    new(): DeferredPermissionRequest;
+};
+
+interface DelayNode extends AudioNode {
+    readonly delayTime: AudioParam;
+}
+
+declare var DelayNode: {
+    prototype: DelayNode;
+    new(): DelayNode;
+};
+
+interface DeviceAcceleration {
+    readonly x: number | null;
+    readonly y: number | null;
+    readonly z: number | null;
+}
+
+declare var DeviceAcceleration: {
+    prototype: DeviceAcceleration;
+    new(): DeviceAcceleration;
+};
+
+interface DeviceLightEvent extends Event {
+    readonly value: number;
+}
+
+declare var DeviceLightEvent: {
+    prototype: DeviceLightEvent;
+    new(typeArg: string, eventInitDict?: DeviceLightEventInit): DeviceLightEvent;
+};
+
+interface DeviceMotionEvent extends Event {
+    readonly acceleration: DeviceAcceleration | null;
+    readonly accelerationIncludingGravity: DeviceAcceleration | null;
+    readonly interval: number | null;
+    readonly rotationRate: DeviceRotationRate | null;
+    initDeviceMotionEvent(type: string, bubbles: boolean, cancelable: boolean, acceleration: DeviceAccelerationDict | null, accelerationIncludingGravity: DeviceAccelerationDict | null, rotationRate: DeviceRotationRateDict | null, interval: number | null): void;
+}
+
+declare var DeviceMotionEvent: {
+    prototype: DeviceMotionEvent;
+    new(typeArg: string, eventInitDict?: DeviceMotionEventInit): DeviceMotionEvent;
+};
+
+interface DeviceOrientationEvent extends Event {
+    readonly absolute: boolean;
+    readonly alpha: number | null;
+    readonly beta: number | null;
+    readonly gamma: number | null;
+    initDeviceOrientationEvent(type: string, bubbles: boolean, cancelable: boolean, alpha: number | null, beta: number | null, gamma: number | null, absolute: boolean): void;
+}
+
+declare var DeviceOrientationEvent: {
+    prototype: DeviceOrientationEvent;
+    new(typeArg: string, eventInitDict?: DeviceOrientationEventInit): DeviceOrientationEvent;
+};
+
+interface DeviceRotationRate {
+    readonly alpha: number | null;
+    readonly beta: number | null;
+    readonly gamma: number | null;
+}
+
+declare var DeviceRotationRate: {
+    prototype: DeviceRotationRate;
+    new(): DeviceRotationRate;
+};
+
+interface DocumentEventMap extends GlobalEventHandlersEventMap {
+    "abort": UIEvent;
+    "activate": UIEvent;
+    "beforeactivate": UIEvent;
+    "beforedeactivate": UIEvent;
+    "blur": FocusEvent;
+    "canplay": Event;
+    "canplaythrough": Event;
+    "change": Event;
+    "click": MouseEvent;
+    "contextmenu": PointerEvent;
+    "dblclick": MouseEvent;
+    "deactivate": UIEvent;
+    "drag": DragEvent;
+    "dragend": DragEvent;
+    "dragenter": DragEvent;
+    "dragleave": DragEvent;
+    "dragover": DragEvent;
+    "dragstart": DragEvent;
+    "drop": DragEvent;
+    "durationchange": Event;
+    "emptied": Event;
+    "ended": MediaStreamErrorEvent;
+    "error": ErrorEvent;
+    "focus": FocusEvent;
+    "fullscreenchange": Event;
+    "fullscreenerror": Event;
+    "input": Event;
+    "invalid": Event;
+    "keydown": KeyboardEvent;
+    "keypress": KeyboardEvent;
+    "keyup": KeyboardEvent;
+    "load": Event;
+    "loadeddata": Event;
+    "loadedmetadata": Event;
+    "loadstart": Event;
+    "mousedown": MouseEvent;
+    "mousemove": MouseEvent;
+    "mouseout": MouseEvent;
+    "mouseover": MouseEvent;
+    "mouseup": MouseEvent;
+    "mousewheel": WheelEvent;
+    "MSContentZoom": UIEvent;
+    "MSGestureChange": MSGestureEvent;
+    "MSGestureDoubleTap": MSGestureEvent;
+    "MSGestureEnd": MSGestureEvent;
+    "MSGestureHold": MSGestureEvent;
+    "MSGestureStart": MSGestureEvent;
+    "MSGestureTap": MSGestureEvent;
+    "MSInertiaStart": MSGestureEvent;
+    "MSManipulationStateChanged": MSManipulationEvent;
+    "MSPointerCancel": MSPointerEvent;
+    "MSPointerDown": MSPointerEvent;
+    "MSPointerEnter": MSPointerEvent;
+    "MSPointerLeave": MSPointerEvent;
+    "MSPointerMove": MSPointerEvent;
+    "MSPointerOut": MSPointerEvent;
+    "MSPointerOver": MSPointerEvent;
+    "MSPointerUp": MSPointerEvent;
+    "mssitemodejumplistitemremoved": MSSiteModeEvent;
+    "msthumbnailclick": MSSiteModeEvent;
+    "pause": Event;
+    "play": Event;
+    "playing": Event;
+    "pointerlockchange": Event;
+    "pointerlockerror": Event;
+    "progress": ProgressEvent;
+    "ratechange": Event;
+    "readystatechange": Event;
+    "reset": Event;
+    "scroll": UIEvent;
+    "seeked": Event;
+    "seeking": Event;
+    "select": UIEvent;
+    "selectionchange": Event;
+    "selectstart": Event;
+    "stalled": Event;
+    "stop": Event;
+    "submit": Event;
+    "suspend": Event;
+    "timeupdate": Event;
+    "touchcancel": TouchEvent;
+    "touchend": TouchEvent;
+    "touchmove": TouchEvent;
+    "touchstart": TouchEvent;
+    "volumechange": Event;
+    "waiting": Event;
+    "webkitfullscreenchange": Event;
+    "webkitfullscreenerror": Event;
+}
+
+interface Document extends Node, GlobalEventHandlers, NodeSelector, DocumentEvent, ParentNode, DocumentOrShadowRoot {
+    /**
+     * Gets the object that has the focus when the parent document has focus.
+     */
+    readonly activeElement: Element;
+    /**
+     * Sets or gets the color of all active links in the document.
+     */
+    alinkColor: string;
+    /**
+     * Returns a reference to the collection of elements contained by the object.
+     */
+    readonly all: HTMLAllCollection;
+    /**
+     * Retrieves a collection of all a objects that have a name and/or id property. Objects in this collection are in HTML source order.
+     */
+    anchors: HTMLCollectionOf<HTMLAnchorElement>;
+    /**
+     * Retrieves a collection of all applet objects in the document.
+     */
+    applets: HTMLCollectionOf<HTMLAppletElement>;
+    /**
+     * Deprecated. Sets or retrieves a value that indicates the background color behind the object.
+     */
+    bgColor: string;
+    /**
+     * Specifies the beginning and end of the document body.
+     */
+    body: HTMLElement;
+    readonly characterSet: string;
+    /**
+     * Gets or sets the character set used to encode the object.
+     */
+    charset: string;
+    /**
+     * Gets a value that indicates whether standards-compliant mode is switched on for the object.
+     */
+    readonly compatMode: string;
+    cookie: string;
+    readonly currentScript: HTMLScriptElement | SVGScriptElement;
+    readonly defaultView: Window;
+    /**
+     * Sets or gets a value that indicates whether the document can be edited.
+     */
+    designMode: string;
+    /**
+     * Sets or retrieves a value that indicates the reading order of the object.
+     */
+    dir: string;
+    /**
+     * Gets an object representing the document type declaration associated with the current document.
+     */
+    readonly doctype: DocumentType;
+    /**
+     * Gets a reference to the root node of the document.
+     */
+    documentElement: HTMLElement;
+    /**
+     * Sets or gets the security domain of the document.
+     */
+    domain: string;
+    /**
+     * Retrieves a collection of all embed objects in the document.
+     */
+    embeds: HTMLCollectionOf<HTMLEmbedElement>;
+    /**
+     * Sets or gets the foreground (text) color of the document.
+     */
+    fgColor: string;
+    /**
+     * Retrieves a collection, in source order, of all form objects in the document.
+     */
+    forms: HTMLCollectionOf<HTMLFormElement>;
+    readonly fullscreenElement: Element | null;
+    readonly fullscreenEnabled: boolean;
+    readonly head: HTMLHeadElement;
+    readonly hidden: boolean;
+    /**
+     * Retrieves a collection, in source order, of img objects in the document.
+     */
+    images: HTMLCollectionOf<HTMLImageElement>;
+    /**
+     * Gets the implementation object of the current document.
+     */
+    readonly implementation: DOMImplementation;
+    /**
+     * Returns the character encoding used to create the webpage that is loaded into the document object.
+     */
+    readonly inputEncoding: string | null;
+    /**
+     * Gets the date that the page was last modified, if the page supplies one.
+     */
+    readonly lastModified: string;
+    /**
+     * Sets or gets the color of the document links.
+     */
+    linkColor: string;
+    /**
+     * Retrieves a collection of all a objects that specify the href property and all area objects in the document.
+     */
+    links: HTMLCollectionOf<HTMLAnchorElement | HTMLAreaElement>;
+    /**
+     * Contains information about the current URL.
+     */
+    readonly location: Location;
+    msCapsLockWarningOff: boolean;
+    msCSSOMElementFloatMetrics: boolean;
+    /**
+     * Fires when the user aborts the download.
+     * @param ev The event.
+     */
+    onabort: (this: Document, ev: UIEvent) => any;
+    /**
+     * Fires when the object is set as the active element.
+     * @param ev The event.
+     */
+    onactivate: (this: Document, ev: UIEvent) => any;
+    /**
+     * Fires immediately before the object is set as the active element.
+     * @param ev The event.
+     */
+    onbeforeactivate: (this: Document, ev: UIEvent) => any;
+    /**
+     * Fires immediately before the activeElement is changed from the current object to another object in the parent document.
+     * @param ev The event.
+     */
+    onbeforedeactivate: (this: Document, ev: UIEvent) => any;
+    /**
+     * Fires when the object loses the input focus.
+     * @param ev The focus event.
+     */
+    onblur: (this: Document, ev: FocusEvent) => any;
+    /**
+     * Occurs when playback is possible, but would require further buffering.
+     * @param ev The event.
+     */
+    oncanplay: (this: Document, ev: Event) => any;
+    oncanplaythrough: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the contents of the object or selection have changed.
+     * @param ev The event.
+     */
+    onchange: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the user clicks the left mouse button on the object
+     * @param ev The mouse event.
+     */
+    onclick: (this: Document, ev: MouseEvent) => any;
+    /**
+     * Fires when the user clicks the right mouse button in the client area, opening the context menu.
+     * @param ev The mouse event.
+     */
+    oncontextmenu: (this: Document, ev: PointerEvent) => any;
+    /**
+     * Fires when the user double-clicks the object.
+     * @param ev The mouse event.
+     */
+    ondblclick: (this: Document, ev: MouseEvent) => any;
+    /**
+     * Fires when the activeElement is changed from the current object to another object in the parent document.
+     * @param ev The UI Event
+     */
+    ondeactivate: (this: Document, ev: UIEvent) => any;
+    /**
+     * Fires on the source object continuously during a drag operation.
+     * @param ev The event.
+     */
+    ondrag: (this: Document, ev: DragEvent) => any;
+    /**
+     * Fires on the source object when the user releases the mouse at the close of a drag operation.
+     * @param ev The event.
+     */
+    ondragend: (this: Document, ev: DragEvent) => any;
+    /**
+     * Fires on the target element when the user drags the object to a valid drop target.
+     * @param ev The drag event.
+     */
+    ondragenter: (this: Document, ev: DragEvent) => any;
+    /**
+     * Fires on the target object when the user moves the mouse out of a valid drop target during a drag operation.
+     * @param ev The drag event.
+     */
+    ondragleave: (this: Document, ev: DragEvent) => any;
+    /**
+     * Fires on the target element continuously while the user drags the object over a valid drop target.
+     * @param ev The event.
+     */
+    ondragover: (this: Document, ev: DragEvent) => any;
+    /**
+     * Fires on the source object when the user starts to drag a text selection or selected object.
+     * @param ev The event.
+     */
+    ondragstart: (this: Document, ev: DragEvent) => any;
+    ondrop: (this: Document, ev: DragEvent) => any;
+    /**
+     * Occurs when the duration attribute is updated.
+     * @param ev The event.
+     */
+    ondurationchange: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when the media element is reset to its initial state.
+     * @param ev The event.
+     */
+    onemptied: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when the end of playback is reached.
+     * @param ev The event
+     */
+    onended: (this: Document, ev: MediaStreamErrorEvent) => any;
+    /**
+     * Fires when an error occurs during object loading.
+     * @param ev The event.
+     */
+    onerror: (this: Document, ev: ErrorEvent) => any;
+    /**
+     * Fires when the object receives focus.
+     * @param ev The event.
+     */
+    onfocus: (this: Document, ev: FocusEvent) => any;
+    onfullscreenchange: (this: Document, ev: Event) => any;
+    onfullscreenerror: (this: Document, ev: Event) => any;
+    oninput: (this: Document, ev: Event) => any;
+    oninvalid: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the user presses a key.
+     * @param ev The keyboard event
+     */
+    onkeydown: (this: Document, ev: KeyboardEvent) => any;
+    /**
+     * Fires when the user presses an alphanumeric key.
+     * @param ev The event.
+     */
+    onkeypress: (this: Document, ev: KeyboardEvent) => any;
+    /**
+     * Fires when the user releases a key.
+     * @param ev The keyboard event
+     */
+    onkeyup: (this: Document, ev: KeyboardEvent) => any;
+    /**
+     * Fires immediately after the browser loads the object.
+     * @param ev The event.
+     */
+    onload: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when media data is loaded at the current playback position.
+     * @param ev The event.
+     */
+    onloadeddata: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when the duration and dimensions of the media have been determined.
+     * @param ev The event.
+     */
+    onloadedmetadata: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when Internet Explorer begins looking for media data.
+     * @param ev The event.
+     */
+    onloadstart: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the user clicks the object with either mouse button.
+     * @param ev The mouse event.
+     */
+    onmousedown: (this: Document, ev: MouseEvent) => any;
+    /**
+     * Fires when the user moves the mouse over the object.
+     * @param ev The mouse event.
+     */
+    onmousemove: (this: Document, ev: MouseEvent) => any;
+    /**
+     * Fires when the user moves the mouse pointer outside the boundaries of the object.
+     * @param ev The mouse event.
+     */
+    onmouseout: (this: Document, ev: MouseEvent) => any;
+    /**
+     * Fires when the user moves the mouse pointer into the object.
+     * @param ev The mouse event.
+     */
+    onmouseover: (this: Document, ev: MouseEvent) => any;
+    /**
+     * Fires when the user releases a mouse button while the mouse is over the object.
+     * @param ev The mouse event.
+     */
+    onmouseup: (this: Document, ev: MouseEvent) => any;
+    /**
+     * Fires when the wheel button is rotated.
+     * @param ev The mouse event
+     */
+    onmousewheel: (this: Document, ev: WheelEvent) => any;
+    onmscontentzoom: (this: Document, ev: UIEvent) => any;
+    onmsgesturechange: (this: Document, ev: MSGestureEvent) => any;
+    onmsgesturedoubletap: (this: Document, ev: MSGestureEvent) => any;
+    onmsgestureend: (this: Document, ev: MSGestureEvent) => any;
+    onmsgesturehold: (this: Document, ev: MSGestureEvent) => any;
+    onmsgesturestart: (this: Document, ev: MSGestureEvent) => any;
+    onmsgesturetap: (this: Document, ev: MSGestureEvent) => any;
+    onmsinertiastart: (this: Document, ev: MSGestureEvent) => any;
+    onmsmanipulationstatechanged: (this: Document, ev: MSManipulationEvent) => any;
+    onmspointercancel: (this: Document, ev: MSPointerEvent) => any;
+    onmspointerdown: (this: Document, ev: MSPointerEvent) => any;
+    onmspointerenter: (this: Document, ev: MSPointerEvent) => any;
+    onmspointerleave: (this: Document, ev: MSPointerEvent) => any;
+    onmspointermove: (this: Document, ev: MSPointerEvent) => any;
+    onmspointerout: (this: Document, ev: MSPointerEvent) => any;
+    onmspointerover: (this: Document, ev: MSPointerEvent) => any;
+    onmspointerup: (this: Document, ev: MSPointerEvent) => any;
+    /**
+     * Occurs when an item is removed from a Jump List of a webpage running in Site Mode.
+     * @param ev The event.
+     */
+    onmssitemodejumplistitemremoved: (this: Document, ev: MSSiteModeEvent) => any;
+    /**
+     * Occurs when a user clicks a button in a Thumbnail Toolbar of a webpage running in Site Mode.
+     * @param ev The event.
+     */
+    onmsthumbnailclick: (this: Document, ev: MSSiteModeEvent) => any;
+    /**
+     * Occurs when playback is paused.
+     * @param ev The event.
+     */
+    onpause: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when the play method is requested.
+     * @param ev The event.
+     */
+    onplay: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when the audio or video has started playing.
+     * @param ev The event.
+     */
+    onplaying: (this: Document, ev: Event) => any;
+    onpointerlockchange: (this: Document, ev: Event) => any;
+    onpointerlockerror: (this: Document, ev: Event) => any;
+    /**
+     * Occurs to indicate progress while downloading media data.
+     * @param ev The event.
+     */
+    onprogress: (this: Document, ev: ProgressEvent) => any;
+    /**
+     * Occurs when the playback rate is increased or decreased.
+     * @param ev The event.
+     */
+    onratechange: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the state of the object has changed.
+     * @param ev The event
+     */
+    onreadystatechange: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the user resets a form.
+     * @param ev The event.
+     */
+    onreset: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the user repositions the scroll box in the scroll bar on the object.
+     * @param ev The event.
+     */
+    onscroll: (this: Document, ev: UIEvent) => any;
+    /**
+     * Occurs when the seek operation ends.
+     * @param ev The event.
+     */
+    onseeked: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when the current playback position is moved.
+     * @param ev The event.
+     */
+    onseeking: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the current selection changes.
+     * @param ev The event.
+     */
+    onselect: (this: Document, ev: UIEvent) => any;
+    /**
+     * Fires when the selection state of a document changes.
+     * @param ev The event.
+     */
+    onselectionchange: (this: Document, ev: Event) => any;
+    onselectstart: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when the download has stopped.
+     * @param ev The event.
+     */
+    onstalled: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the user clicks the Stop button or leaves the Web page.
+     * @param ev The event.
+     */
+    onstop: (this: Document, ev: Event) => any;
+    onsubmit: (this: Document, ev: Event) => any;
+    /**
+     * Occurs if the load operation has been intentionally halted.
+     * @param ev The event.
+     */
+    onsuspend: (this: Document, ev: Event) => any;
+    /**
+     * Occurs to indicate the current playback position.
+     * @param ev The event.
+     */
+    ontimeupdate: (this: Document, ev: Event) => any;
+    ontouchcancel: (ev: TouchEvent) => any;
+    ontouchend: (ev: TouchEvent) => any;
+    ontouchmove: (ev: TouchEvent) => any;
+    ontouchstart: (ev: TouchEvent) => any;
+    /**
+     * Occurs when the volume is changed, or playback is muted or unmuted.
+     * @param ev The event.
+     */
+    onvolumechange: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when playback stops because the next frame of a video resource is not available.
+     * @param ev The event.
+     */
+    onwaiting: (this: Document, ev: Event) => any;
+    onwebkitfullscreenchange: (this: Document, ev: Event) => any;
+    onwebkitfullscreenerror: (this: Document, ev: Event) => any;
+    plugins: HTMLCollectionOf<HTMLEmbedElement>;
+    readonly pointerLockElement: Element;
+    /**
+     * Retrieves a value that indicates the current state of the object.
+     */
+    readonly readyState: string;
+    /**
+     * Gets the URL of the location that referred the user to the current page.
+     */
+    readonly referrer: string;
+    /**
+     * Gets the root svg element in the document hierarchy.
+     */
+    readonly rootElement: SVGSVGElement;
+    /**
+     * Retrieves a collection of all script objects in the document.
+     */
+    scripts: HTMLCollectionOf<HTMLScriptElement>;
+    readonly scrollingElement: Element | null;
+    /**
+     * Retrieves a collection of styleSheet objects representing the style sheets that correspond to each instance of a link or style object in the document.
+     */
+    readonly styleSheets: StyleSheetList;
+    /**
+     * Contains the title of the document.
+     */
+    title: string;
+    /**
+     * Sets or gets the URL for the current document.
+     */
+    readonly URL: string;
+    /**
+     * Gets the URL for the document, stripped of any character encoding.
+     */
+    readonly URLUnencoded: string;
+    readonly visibilityState: VisibilityState;
+    /**
+     * Sets or gets the color of the links that the user has visited.
+     */
+    vlinkColor: string;
+    readonly webkitCurrentFullScreenElement: Element | null;
+    readonly webkitFullscreenElement: Element | null;
+    readonly webkitFullscreenEnabled: boolean;
+    readonly webkitIsFullScreen: boolean;
+    readonly xmlEncoding: string | null;
+    xmlStandalone: boolean;
+    /**
+     * Gets or sets the version attribute specified in the declaration of an XML document.
+     */
+    xmlVersion: string | null;
+    adoptNode<T extends Node>(source: T): T;
+    captureEvents(): void;
+    caretRangeFromPoint(x: number, y: number): Range;
+    clear(): void;
+    /**
+     * Closes an output stream and forces the sent data to display.
+     */
+    close(): void;
+    /**
+     * Creates an attribute object with a specified name.
+     * @param name String that sets the attribute object's name.
+     */
+    createAttribute(name: string): Attr;
+    createAttributeNS(namespaceURI: string | null, qualifiedName: string): Attr;
+    createCDATASection(data: string): CDATASection;
+    /**
+     * Creates a comment object with the specified data.
+     * @param data Sets the comment object's data.
+     */
+    createComment(data: string): Comment;
+    /**
+     * Creates a new document.
+     */
+    createDocumentFragment(): DocumentFragment;
+    /**
+     * Creates an instance of the element for the specified tag.
+     * @param tagName The name of an element.
+     */
+    createElement<K extends keyof HTMLElementTagNameMap>(tagName: K): HTMLElementTagNameMap[K];
+    createElement(tagName: string): HTMLElement;
+    createElementNS(namespaceURI: "http://www.w3.org/1999/xhtml", qualifiedName: string): HTMLElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "a"): SVGAElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "circle"): SVGCircleElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "clipPath"): SVGClipPathElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "componentTransferFunction"): SVGComponentTransferFunctionElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "defs"): SVGDefsElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "desc"): SVGDescElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "ellipse"): SVGEllipseElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feBlend"): SVGFEBlendElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feColorMatrix"): SVGFEColorMatrixElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feComponentTransfer"): SVGFEComponentTransferElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feComposite"): SVGFECompositeElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feConvolveMatrix"): SVGFEConvolveMatrixElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feDiffuseLighting"): SVGFEDiffuseLightingElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feDisplacementMap"): SVGFEDisplacementMapElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feDistantLight"): SVGFEDistantLightElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feFlood"): SVGFEFloodElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feFuncA"): SVGFEFuncAElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feFuncB"): SVGFEFuncBElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feFuncG"): SVGFEFuncGElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feFuncR"): SVGFEFuncRElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feGaussianBlur"): SVGFEGaussianBlurElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feImage"): SVGFEImageElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feMerge"): SVGFEMergeElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feMergeNode"): SVGFEMergeNodeElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feMorphology"): SVGFEMorphologyElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feOffset"): SVGFEOffsetElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "fePointLight"): SVGFEPointLightElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feSpecularLighting"): SVGFESpecularLightingElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feSpotLight"): SVGFESpotLightElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feTile"): SVGFETileElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feTurbulence"): SVGFETurbulenceElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "filter"): SVGFilterElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "foreignObject"): SVGForeignObjectElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "g"): SVGGElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "image"): SVGImageElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "gradient"): SVGGradientElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "line"): SVGLineElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "linearGradient"): SVGLinearGradientElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "marker"): SVGMarkerElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "mask"): SVGMaskElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "path"): SVGPathElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "metadata"): SVGMetadataElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "pattern"): SVGPatternElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "polygon"): SVGPolygonElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "polyline"): SVGPolylineElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "radialGradient"): SVGRadialGradientElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "rect"): SVGRectElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "svg"): SVGSVGElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "script"): SVGScriptElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "stop"): SVGStopElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "style"): SVGStyleElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "switch"): SVGSwitchElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "symbol"): SVGSymbolElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "tspan"): SVGTSpanElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "textContent"): SVGTextContentElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "text"): SVGTextElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "textPath"): SVGTextPathElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "textPositioning"): SVGTextPositioningElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "title"): SVGTitleElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "use"): SVGUseElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "view"): SVGViewElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: string): SVGElement;
+    createElementNS(namespaceURI: string | null, qualifiedName: string): Element;
+    createExpression(expression: string, resolver: XPathNSResolver): XPathExpression;
+    /**
+     * Creates a NodeIterator object that you can use to traverse filtered lists of nodes or elements in a document.
+     * @param root The root element or node to start traversing on.
+     * @param whatToShow The type of nodes or elements to appear in the node list
+     * @param filter A custom NodeFilter function to use. For more information, see filter. Use null for no filter.
+     * @param entityReferenceExpansion A flag that specifies whether entity reference nodes are expanded.
+     */
+    createNodeIterator(root: Node, whatToShow?: number, filter?: NodeFilter, entityReferenceExpansion?: boolean): NodeIterator;
+    createNSResolver(nodeResolver: Node): XPathNSResolver;
+    createProcessingInstruction(target: string, data: string): ProcessingInstruction;
+    /**
+     *  Returns an empty range object that has both of its boundary points positioned at the beginning of the document.
+     */
+    createRange(): Range;
+    /**
+     * Creates a text string from the specified value.
+     * @param data String that specifies the nodeValue property of the text node.
+     */
+    createTextNode(data: string): Text;
+    createTouch(view: Window, target: EventTarget, identifier: number, pageX: number, pageY: number, screenX: number, screenY: number): Touch;
+    createTouchList(...touches: Touch[]): TouchList;
+    /**
+     * Creates a TreeWalker object that you can use to traverse filtered lists of nodes or elements in a document.
+     * @param root The root element or node to start traversing on.
+     * @param whatToShow The type of nodes or elements to appear in the node list. For more information, see whatToShow.
+     * @param filter A custom NodeFilter function to use.
+     * @param entityReferenceExpansion A flag that specifies whether entity reference nodes are expanded.
+     */
+    createTreeWalker(root: Node, whatToShow?: number, filter?: NodeFilter, entityReferenceExpansion?: boolean): TreeWalker;
+    /**
+     * Returns the element for the specified x coordinate and the specified y coordinate.
+     * @param x The x-offset
+     * @param y The y-offset
+     */
+    elementFromPoint(x: number, y: number): Element;
+    evaluate(expression: string, contextNode: Node, resolver: XPathNSResolver | null, type: number, result: XPathResult | null): XPathResult;
+    /**
+     * Executes a command on the current document, current selection, or the given range.
+     * @param commandId String that specifies the command to execute. This command can be any of the command identifiers that can be executed in script.
+     * @param showUI Display the user interface, defaults to false.
+     * @param value Value to assign.
+     */
+    execCommand(commandId: string, showUI?: boolean, value?: any): boolean;
+    /**
+     * Displays help information for the given command identifier.
+     * @param commandId Displays help information for the given command identifier.
+     */
+    execCommandShowHelp(commandId: string): boolean;
+    exitFullscreen(): void;
+    exitPointerLock(): void;
+    /**
+     * Causes the element to receive the focus and executes the code specified by the onfocus event.
+     */
+    focus(): void;
+    /**
+     * Returns a reference to the first object with the specified value of the ID or NAME attribute.
+     * @param elementId String that specifies the ID value. Case-insensitive.
+     */
+    getElementById(elementId: string): HTMLElement | null;
+    getElementsByClassName(classNames: string): HTMLCollectionOf<Element>;
+    /**
+     * Gets a collection of objects based on the value of the NAME or ID attribute.
+     * @param elementName Gets a collection of objects based on the value of the NAME or ID attribute.
+     */
+    getElementsByName(elementName: string): NodeListOf<HTMLElement>;
+    /**
+     * Retrieves a collection of objects based on the specified element name.
+     * @param name Specifies the name of an element.
+     */
+    getElementsByTagName<K extends keyof ElementListTagNameMap>(tagname: K): ElementListTagNameMap[K];
+    getElementsByTagName(tagname: string): NodeListOf<Element>;
+    getElementsByTagNameNS(namespaceURI: "http://www.w3.org/1999/xhtml", localName: string): HTMLCollectionOf<HTMLElement>;
+    getElementsByTagNameNS(namespaceURI: "http://www.w3.org/2000/svg", localName: string): HTMLCollectionOf<SVGElement>;
+    getElementsByTagNameNS(namespaceURI: string, localName: string): HTMLCollectionOf<Element>;
+    /**
+     * Returns an object representing the current selection of the document that is loaded into the object displaying a webpage.
+     */
+    getSelection(): Selection;
+    /**
+     * Gets a value indicating whether the object currently has focus.
+     */
+    hasFocus(): boolean;
+    importNode<T extends Node>(importedNode: T, deep: boolean): T;
+    msElementsFromPoint(x: number, y: number): NodeListOf<Element>;
+    msElementsFromRect(left: number, top: number, width: number, height: number): NodeListOf<Element>;
+    /**
+     * Opens a new window and loads a document specified by a given URL. Also, opens a new window that uses the url parameter and the name parameter to collect the output of the write method and the writeln method.
+     * @param url Specifies a MIME type for the document.
+     * @param name Specifies the name of the window. This name is used as the value for the TARGET attribute on a form or an anchor element.
+     * @param features Contains a list of items separated by commas. Each item consists of an option and a value, separated by an equals sign (for example, "fullscreen=yes, toolbar=yes"). The following values are supported.
+     * @param replace Specifies whether the existing entry for the document is replaced in the history list.
+     */
+    open(url?: string, name?: string, features?: string, replace?: boolean): Document;
+    /**
+     * Returns a Boolean value that indicates whether a specified command can be successfully executed using execCommand, given the current state of the document.
+     * @param commandId Specifies a command identifier.
+     */
+    queryCommandEnabled(commandId: string): boolean;
+    /**
+     * Returns a Boolean value that indicates whether the specified command is in the indeterminate state.
+     * @param commandId String that specifies a command identifier.
+     */
+    queryCommandIndeterm(commandId: string): boolean;
+    /**
+     * Returns a Boolean value that indicates the current state of the command.
+     * @param commandId String that specifies a command identifier.
+     */
+    queryCommandState(commandId: string): boolean;
+    /**
+     * Returns a Boolean value that indicates whether the current command is supported on the current range.
+     * @param commandId Specifies a command identifier.
+     */
+    queryCommandSupported(commandId: string): boolean;
+    /**
+     * Retrieves the string associated with a command.
+     * @param commandId String that contains the identifier of a command. This can be any command identifier given in the list of Command Identifiers.
+     */
+    queryCommandText(commandId: string): string;
+    /**
+     * Returns the current value of the document, range, or current selection for the given command.
+     * @param commandId String that specifies a command identifier.
+     */
+    queryCommandValue(commandId: string): string;
+    releaseEvents(): void;
+    /**
+     * Allows updating the print settings for the page.
+     */
+    updateSettings(): void;
+    webkitCancelFullScreen(): void;
+    webkitExitFullscreen(): void;
+    /**
+     * Writes one or more HTML expressions to a document in the specified window.
+     * @param content Specifies the text and HTML tags to write.
+     */
+    write(...content: string[]): void;
+    /**
+     * Writes one or more HTML expressions, followed by a carriage return, to a document in the specified window.
+     * @param content The text and HTML tags to write.
+     */
+    writeln(...content: string[]): void;
+    addEventListener<K extends keyof DocumentEventMap>(type: K, listener: (this: Document, ev: DocumentEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var Document: {
+    prototype: Document;
+    new(): Document;
+};
+
+interface DocumentFragment extends Node, NodeSelector, ParentNode {
+    getElementById(elementId: string): HTMLElement | null;
+}
+
+declare var DocumentFragment: {
+    prototype: DocumentFragment;
+    new(): DocumentFragment;
+};
+
+interface DocumentType extends Node, ChildNode {
+    readonly entities: NamedNodeMap;
+    readonly internalSubset: string | null;
+    readonly name: string;
+    readonly notations: NamedNodeMap;
+    readonly publicId: string;
+    readonly systemId: string;
+}
+
+declare var DocumentType: {
+    prototype: DocumentType;
+    new(): DocumentType;
+};
+
+interface DOMError {
+    readonly name: string;
+    toString(): string;
+}
+
+declare var DOMError: {
+    prototype: DOMError;
+    new(): DOMError;
+};
+
+interface DOMException {
+    readonly code: number;
+    readonly message: string;
+    readonly name: string;
+    toString(): string;
+    readonly ABORT_ERR: number;
+    readonly DATA_CLONE_ERR: number;
+    readonly DOMSTRING_SIZE_ERR: number;
+    readonly HIERARCHY_REQUEST_ERR: number;
+    readonly INDEX_SIZE_ERR: number;
+    readonly INUSE_ATTRIBUTE_ERR: number;
+    readonly INVALID_ACCESS_ERR: number;
+    readonly INVALID_CHARACTER_ERR: number;
+    readonly INVALID_MODIFICATION_ERR: number;
+    readonly INVALID_NODE_TYPE_ERR: number;
+    readonly INVALID_STATE_ERR: number;
+    readonly NAMESPACE_ERR: number;
+    readonly NETWORK_ERR: number;
+    readonly NO_DATA_ALLOWED_ERR: number;
+    readonly NO_MODIFICATION_ALLOWED_ERR: number;
+    readonly NOT_FOUND_ERR: number;
+    readonly NOT_SUPPORTED_ERR: number;
+    readonly PARSE_ERR: number;
+    readonly QUOTA_EXCEEDED_ERR: number;
+    readonly SECURITY_ERR: number;
+    readonly SERIALIZE_ERR: number;
+    readonly SYNTAX_ERR: number;
+    readonly TIMEOUT_ERR: number;
+    readonly TYPE_MISMATCH_ERR: number;
+    readonly URL_MISMATCH_ERR: number;
+    readonly VALIDATION_ERR: number;
+    readonly WRONG_DOCUMENT_ERR: number;
+}
+
+declare var DOMException: {
+    prototype: DOMException;
+    new(): DOMException;
+    readonly ABORT_ERR: number;
+    readonly DATA_CLONE_ERR: number;
+    readonly DOMSTRING_SIZE_ERR: number;
+    readonly HIERARCHY_REQUEST_ERR: number;
+    readonly INDEX_SIZE_ERR: number;
+    readonly INUSE_ATTRIBUTE_ERR: number;
+    readonly INVALID_ACCESS_ERR: number;
+    readonly INVALID_CHARACTER_ERR: number;
+    readonly INVALID_MODIFICATION_ERR: number;
+    readonly INVALID_NODE_TYPE_ERR: number;
+    readonly INVALID_STATE_ERR: number;
+    readonly NAMESPACE_ERR: number;
+    readonly NETWORK_ERR: number;
+    readonly NO_DATA_ALLOWED_ERR: number;
+    readonly NO_MODIFICATION_ALLOWED_ERR: number;
+    readonly NOT_FOUND_ERR: number;
+    readonly NOT_SUPPORTED_ERR: number;
+    readonly PARSE_ERR: number;
+    readonly QUOTA_EXCEEDED_ERR: number;
+    readonly SECURITY_ERR: number;
+    readonly SERIALIZE_ERR: number;
+    readonly SYNTAX_ERR: number;
+    readonly TIMEOUT_ERR: number;
+    readonly TYPE_MISMATCH_ERR: number;
+    readonly URL_MISMATCH_ERR: number;
+    readonly VALIDATION_ERR: number;
+    readonly WRONG_DOCUMENT_ERR: number;
+};
+
+interface DOMImplementation {
+    createDocument(namespaceURI: string | null, qualifiedName: string | null, doctype: DocumentType | null): Document;
+    createDocumentType(qualifiedName: string, publicId: string, systemId: string): DocumentType;
+    createHTMLDocument(title: string): Document;
+    hasFeature(feature: string | null, version: string | null): boolean;
+}
+
+declare var DOMImplementation: {
+    prototype: DOMImplementation;
+    new(): DOMImplementation;
+};
+
+interface DOMParser {
+    parseFromString(source: string, mimeType: string): Document;
+}
+
+declare var DOMParser: {
+    prototype: DOMParser;
+    new(): DOMParser;
+};
+
+interface DOMSettableTokenList extends DOMTokenList {
+    value: string;
+}
+
+declare var DOMSettableTokenList: {
+    prototype: DOMSettableTokenList;
+    new(): DOMSettableTokenList;
+};
+
+interface DOMStringList {
+    readonly length: number;
+    contains(str: string): boolean;
+    item(index: number): string | null;
+    [index: number]: string;
+}
+
+declare var DOMStringList: {
+    prototype: DOMStringList;
+    new(): DOMStringList;
+};
+
+interface DOMStringMap {
+    [name: string]: string | undefined;
+}
+
+declare var DOMStringMap: {
+    prototype: DOMStringMap;
+    new(): DOMStringMap;
+};
+
+interface DOMTokenList {
+    readonly length: number;
+    add(...token: string[]): void;
+    contains(token: string): boolean;
+    item(index: number): string;
+    remove(...token: string[]): void;
+    toggle(token: string, force?: boolean): boolean;
+    toString(): string;
+    [index: number]: string;
+}
+
+declare var DOMTokenList: {
+    prototype: DOMTokenList;
+    new(): DOMTokenList;
+};
+
+interface DragEvent extends MouseEvent {
+    readonly dataTransfer: DataTransfer;
+    initDragEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, ctrlKeyArg: boolean, altKeyArg: boolean, shiftKeyArg: boolean, metaKeyArg: boolean, buttonArg: number, relatedTargetArg: EventTarget, dataTransferArg: DataTransfer): void;
+    msConvertURL(file: File, targetType: string, targetURL?: string): void;
+}
+
+declare var DragEvent: {
+    prototype: DragEvent;
+    new(type: "drag" | "dragend" | "dragenter" | "dragexit" | "dragleave" | "dragover" | "dragstart" | "drop", dragEventInit?: { dataTransfer?: DataTransfer }): DragEvent;
+};
+
+interface DynamicsCompressorNode extends AudioNode {
+    readonly attack: AudioParam;
+    readonly knee: AudioParam;
+    readonly ratio: AudioParam;
+    readonly reduction: number;
+    readonly release: AudioParam;
+    readonly threshold: AudioParam;
+}
+
+declare var DynamicsCompressorNode: {
+    prototype: DynamicsCompressorNode;
+    new(): DynamicsCompressorNode;
+};
+
+interface ElementEventMap extends GlobalEventHandlersEventMap {
+    "ariarequest": Event;
+    "command": Event;
+    "gotpointercapture": PointerEvent;
+    "lostpointercapture": PointerEvent;
+    "MSGestureChange": MSGestureEvent;
+    "MSGestureDoubleTap": MSGestureEvent;
+    "MSGestureEnd": MSGestureEvent;
+    "MSGestureHold": MSGestureEvent;
+    "MSGestureStart": MSGestureEvent;
+    "MSGestureTap": MSGestureEvent;
+    "MSGotPointerCapture": MSPointerEvent;
+    "MSInertiaStart": MSGestureEvent;
+    "MSLostPointerCapture": MSPointerEvent;
+    "MSPointerCancel": MSPointerEvent;
+    "MSPointerDown": MSPointerEvent;
+    "MSPointerEnter": MSPointerEvent;
+    "MSPointerLeave": MSPointerEvent;
+    "MSPointerMove": MSPointerEvent;
+    "MSPointerOut": MSPointerEvent;
+    "MSPointerOver": MSPointerEvent;
+    "MSPointerUp": MSPointerEvent;
+    "touchcancel": TouchEvent;
+    "touchend": TouchEvent;
+    "touchmove": TouchEvent;
+    "touchstart": TouchEvent;
+    "webkitfullscreenchange": Event;
+    "webkitfullscreenerror": Event;
+}
+
+interface Element extends Node, GlobalEventHandlers, ElementTraversal, NodeSelector, ChildNode, ParentNode {
+    readonly classList: DOMTokenList;
+    className: string;
+    readonly clientHeight: number;
+    readonly clientLeft: number;
+    readonly clientTop: number;
+    readonly clientWidth: number;
+    id: string;
+    innerHTML: string;
+    msContentZoomFactor: number;
+    readonly msRegionOverflow: string;
+    onariarequest: (this: Element, ev: Event) => any;
+    oncommand: (this: Element, ev: Event) => any;
+    ongotpointercapture: (this: Element, ev: PointerEvent) => any;
+    onlostpointercapture: (this: Element, ev: PointerEvent) => any;
+    onmsgesturechange: (this: Element, ev: MSGestureEvent) => any;
+    onmsgesturedoubletap: (this: Element, ev: MSGestureEvent) => any;
+    onmsgestureend: (this: Element, ev: MSGestureEvent) => any;
+    onmsgesturehold: (this: Element, ev: MSGestureEvent) => any;
+    onmsgesturestart: (this: Element, ev: MSGestureEvent) => any;
+    onmsgesturetap: (this: Element, ev: MSGestureEvent) => any;
+    onmsgotpointercapture: (this: Element, ev: MSPointerEvent) => any;
+    onmsinertiastart: (this: Element, ev: MSGestureEvent) => any;
+    onmslostpointercapture: (this: Element, ev: MSPointerEvent) => any;
+    onmspointercancel: (this: Element, ev: MSPointerEvent) => any;
+    onmspointerdown: (this: Element, ev: MSPointerEvent) => any;
+    onmspointerenter: (this: Element, ev: MSPointerEvent) => any;
+    onmspointerleave: (this: Element, ev: MSPointerEvent) => any;
+    onmspointermove: (this: Element, ev: MSPointerEvent) => any;
+    onmspointerout: (this: Element, ev: MSPointerEvent) => any;
+    onmspointerover: (this: Element, ev: MSPointerEvent) => any;
+    onmspointerup: (this: Element, ev: MSPointerEvent) => any;
+    ontouchcancel: (ev: TouchEvent) => any;
+    ontouchend: (ev: TouchEvent) => any;
+    ontouchmove: (ev: TouchEvent) => any;
+    ontouchstart: (ev: TouchEvent) => any;
+    onwebkitfullscreenchange: (this: Element, ev: Event) => any;
+    onwebkitfullscreenerror: (this: Element, ev: Event) => any;
+    outerHTML: string;
+    readonly prefix: string | null;
+    readonly scrollHeight: number;
+    scrollLeft: number;
+    scrollTop: number;
+    readonly scrollWidth: number;
+    readonly tagName: string;
+    readonly assignedSlot: HTMLSlotElement | null;
+    slot: string;
+    readonly shadowRoot: ShadowRoot | null;
+    getAttribute(name: string): string | null;
+    getAttributeNode(name: string): Attr;
+    getAttributeNodeNS(namespaceURI: string, localName: string): Attr;
+    getAttributeNS(namespaceURI: string, localName: string): string;
+    getBoundingClientRect(): ClientRect;
+    getClientRects(): ClientRectList;
+    getElementsByTagName<K extends keyof ElementListTagNameMap>(name: K): ElementListTagNameMap[K];
+    getElementsByTagName(name: string): NodeListOf<Element>;
+    getElementsByTagNameNS(namespaceURI: "http://www.w3.org/1999/xhtml", localName: string): HTMLCollectionOf<HTMLElement>;
+    getElementsByTagNameNS(namespaceURI: "http://www.w3.org/2000/svg", localName: string): HTMLCollectionOf<SVGElement>;
+    getElementsByTagNameNS(namespaceURI: string, localName: string): HTMLCollectionOf<Element>;
+    hasAttribute(name: string): boolean;
+    hasAttributeNS(namespaceURI: string, localName: string): boolean;
+    msGetRegionContent(): MSRangeCollection;
+    msGetUntransformedBounds(): ClientRect;
+    msMatchesSelector(selectors: string): boolean;
+    msReleasePointerCapture(pointerId: number): void;
+    msSetPointerCapture(pointerId: number): void;
+    msZoomTo(args: MsZoomToOptions): void;
+    releasePointerCapture(pointerId: number): void;
+    removeAttribute(qualifiedName: string): void;
+    removeAttributeNode(oldAttr: Attr): Attr;
+    removeAttributeNS(namespaceURI: string, localName: string): void;
+    requestFullscreen(): void;
+    requestPointerLock(): void;
+    setAttribute(name: string, value: string): void;
+    setAttributeNode(newAttr: Attr): Attr;
+    setAttributeNodeNS(newAttr: Attr): Attr;
+    setAttributeNS(namespaceURI: string, qualifiedName: string, value: string): void;
+    setPointerCapture(pointerId: number): void;
+    webkitMatchesSelector(selectors: string): boolean;
+    webkitRequestFullscreen(): void;
+    webkitRequestFullScreen(): void;
+    getElementsByClassName(classNames: string): NodeListOf<Element>;
+    matches(selector: string): boolean;
+    closest(selector: string): Element | null;
+    scrollIntoView(arg?: boolean | ScrollIntoViewOptions): void;
+    scroll(options?: ScrollToOptions): void;
+    scroll(x: number, y: number): void;
+    scrollTo(options?: ScrollToOptions): void;
+    scrollTo(x: number, y: number): void;
+    scrollBy(options?: ScrollToOptions): void;
+    scrollBy(x: number, y: number): void;
+    insertAdjacentElement(position: InsertPosition, insertedElement: Element): Element | null;
+    insertAdjacentHTML(where: InsertPosition, html: string): void;
+    insertAdjacentText(where: InsertPosition, text: string): void;
+    attachShadow(shadowRootInitDict: ShadowRootInit): ShadowRoot;
+    addEventListener<K extends keyof ElementEventMap>(type: K, listener: (this: Element, ev: ElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var Element: {
+    prototype: Element;
+    new(): Element;
+};
+
+interface ErrorEvent extends Event {
+    readonly colno: number;
+    readonly error: any;
+    readonly filename: string;
+    readonly lineno: number;
+    readonly message: string;
+    initErrorEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, messageArg: string, filenameArg: string, linenoArg: number): void;
+}
+
+declare var ErrorEvent: {
+    prototype: ErrorEvent;
+    new(type: string, errorEventInitDict?: ErrorEventInit): ErrorEvent;
+};
+
+interface Event {
+    readonly bubbles: boolean;
+    readonly cancelable: boolean;
+    cancelBubble: boolean;
+    readonly currentTarget: EventTarget;
+    readonly defaultPrevented: boolean;
+    readonly eventPhase: number;
+    readonly isTrusted: boolean;
+    returnValue: boolean;
+    readonly srcElement: Element | null;
+    readonly target: EventTarget;
+    readonly timeStamp: number;
+    readonly type: string;
+    readonly scoped: boolean;
+    initEvent(eventTypeArg: string, canBubbleArg: boolean, cancelableArg: boolean): void;
+    preventDefault(): void;
+    stopImmediatePropagation(): void;
+    stopPropagation(): void;
+    deepPath(): EventTarget[];
+    readonly AT_TARGET: number;
+    readonly BUBBLING_PHASE: number;
+    readonly CAPTURING_PHASE: number;
+}
+
+declare var Event: {
+    prototype: Event;
+    new(typeArg: string, eventInitDict?: EventInit): Event;
+    readonly AT_TARGET: number;
+    readonly BUBBLING_PHASE: number;
+    readonly CAPTURING_PHASE: number;
+};
+
+interface EventTarget {
+    addEventListener(type: string, listener?: EventListenerOrEventListenerObject, options?: boolean | AddEventListenerOptions): void;
+    dispatchEvent(evt: Event): boolean;
+    removeEventListener(type: string, listener?: EventListenerOrEventListenerObject, options?: boolean | EventListenerOptions): void;
+}
+
+declare var EventTarget: {
+    prototype: EventTarget;
+    new(): EventTarget;
+};
+
+interface EXT_frag_depth {
+}
+
+declare var EXT_frag_depth: {
+    prototype: EXT_frag_depth;
+    new(): EXT_frag_depth;
+};
+
+interface EXT_texture_filter_anisotropic {
+    readonly MAX_TEXTURE_MAX_ANISOTROPY_EXT: number;
+    readonly TEXTURE_MAX_ANISOTROPY_EXT: number;
+}
+
+declare var EXT_texture_filter_anisotropic: {
+    prototype: EXT_texture_filter_anisotropic;
+    new(): EXT_texture_filter_anisotropic;
+    readonly MAX_TEXTURE_MAX_ANISOTROPY_EXT: number;
+    readonly TEXTURE_MAX_ANISOTROPY_EXT: number;
+};
+
+interface ExtensionScriptApis {
+    extensionIdToShortId(extensionId: string): number;
+    fireExtensionApiTelemetry(functionName: string, isSucceeded: boolean, isSupported: boolean): void;
+    genericFunction(routerAddress: any, parameters?: string, callbackId?: number): void;
+    genericSynchronousFunction(functionId: number, parameters?: string): string;
+    getExtensionId(): string;
+    registerGenericFunctionCallbackHandler(callbackHandler: any): void;
+    registerGenericPersistentCallbackHandler(callbackHandler: any): void;
+}
+
+declare var ExtensionScriptApis: {
+    prototype: ExtensionScriptApis;
+    new(): ExtensionScriptApis;
+};
+
+interface External {
+}
+
+declare var External: {
+    prototype: External;
+    new(): External;
+};
+
+interface File extends Blob {
+    readonly lastModifiedDate: any;
+    readonly name: string;
+    readonly webkitRelativePath: string;
+}
+
+declare var File: {
+    prototype: File;
+    new (parts: (ArrayBuffer | ArrayBufferView | Blob | string)[], filename: string, properties?: FilePropertyBag): File;
+};
+
+interface FileList {
+    readonly length: number;
+    item(index: number): File;
+    [index: number]: File;
+}
+
+declare var FileList: {
+    prototype: FileList;
+    new(): FileList;
+};
+
+interface FileReader extends EventTarget, MSBaseReader {
+    readonly error: DOMError;
+    readAsArrayBuffer(blob: Blob): void;
+    readAsBinaryString(blob: Blob): void;
+    readAsDataURL(blob: Blob): void;
+    readAsText(blob: Blob, encoding?: string): void;
+    addEventListener<K extends keyof MSBaseReaderEventMap>(type: K, listener: (this: FileReader, ev: MSBaseReaderEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var FileReader: {
+    prototype: FileReader;
+    new(): FileReader;
+};
+
+interface FocusEvent extends UIEvent {
+    readonly relatedTarget: EventTarget;
+    initFocusEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, relatedTargetArg: EventTarget): void;
+}
+
+declare var FocusEvent: {
+    prototype: FocusEvent;
+    new(typeArg: string, eventInitDict?: FocusEventInit): FocusEvent;
+};
+
+interface FocusNavigationEvent extends Event {
+    readonly navigationReason: NavigationReason;
+    readonly originHeight: number;
+    readonly originLeft: number;
+    readonly originTop: number;
+    readonly originWidth: number;
+    requestFocus(): void;
+}
+
+declare var FocusNavigationEvent: {
+    prototype: FocusNavigationEvent;
+    new(type: string, eventInitDict?: FocusNavigationEventInit): FocusNavigationEvent;
+};
+
+interface FormData {
+    append(name: string, value: string | Blob, fileName?: string): void;
+    delete(name: string): void;
+    get(name: string): FormDataEntryValue | null;
+    getAll(name: string): FormDataEntryValue[];
+    has(name: string): boolean;
+    set(name: string, value: string | Blob, fileName?: string): void;
+}
+
+declare var FormData: {
+    prototype: FormData;
+    new (form?: HTMLFormElement): FormData;
+};
+
+interface GainNode extends AudioNode {
+    readonly gain: AudioParam;
+}
+
+declare var GainNode: {
+    prototype: GainNode;
+    new(): GainNode;
+};
+
+interface Gamepad {
+    readonly axes: number[];
+    readonly buttons: GamepadButton[];
+    readonly connected: boolean;
+    readonly id: string;
+    readonly index: number;
+    readonly mapping: string;
+    readonly timestamp: number;
+}
+
+declare var Gamepad: {
+    prototype: Gamepad;
+    new(): Gamepad;
+};
+
+interface GamepadButton {
+    readonly pressed: boolean;
+    readonly value: number;
+}
+
+declare var GamepadButton: {
+    prototype: GamepadButton;
+    new(): GamepadButton;
+};
+
+interface GamepadEvent extends Event {
+    readonly gamepad: Gamepad;
+}
+
+declare var GamepadEvent: {
+    prototype: GamepadEvent;
+    new(typeArg: string, eventInitDict?: GamepadEventInit): GamepadEvent;
+};
+
+interface Geolocation {
+    clearWatch(watchId: number): void;
+    getCurrentPosition(successCallback: PositionCallback, errorCallback?: PositionErrorCallback, options?: PositionOptions): void;
+    watchPosition(successCallback: PositionCallback, errorCallback?: PositionErrorCallback, options?: PositionOptions): number;
+}
+
+declare var Geolocation: {
+    prototype: Geolocation;
+    new(): Geolocation;
+};
+
+interface HashChangeEvent extends Event {
+    readonly newURL: string | null;
+    readonly oldURL: string | null;
+}
+
+declare var HashChangeEvent: {
+    prototype: HashChangeEvent;
+    new(typeArg: string, eventInitDict?: HashChangeEventInit): HashChangeEvent;
+};
+
+interface Headers {
+    append(name: string, value: string): void;
+    delete(name: string): void;
+    forEach(callback: ForEachCallback): void;
+    get(name: string): string | null;
+    has(name: string): boolean;
+    set(name: string, value: string): void;
+}
+
+declare var Headers: {
+    prototype: Headers;
+    new(init?: any): Headers;
+};
+
+interface History {
+    readonly length: number;
+    readonly state: any;
+    scrollRestoration: ScrollRestoration;
+    back(): void;
+    forward(): void;
+    go(delta?: number): void;
+    pushState(data: any, title: string, url?: string | null): void;
+    replaceState(data: any, title: string, url?: string | null): void;
+}
+
+declare var History: {
+    prototype: History;
+    new(): History;
+};
+
+interface HTMLAllCollection {
+    readonly length: number;
+    item(nameOrIndex?: string): HTMLCollection | Element | null;
+    namedItem(name: string): HTMLCollection | Element | null;
+    [index: number]: Element;
+}
+
+declare var HTMLAllCollection: {
+    prototype: HTMLAllCollection;
+    new(): HTMLAllCollection;
+};
+
+interface HTMLAnchorElement extends HTMLElement {
+    /**
+     * Sets or retrieves the character set used to encode the object.
+     */
+    charset: string;
+    /**
+     * Sets or retrieves the coordinates of the object.
+     */
+    coords: string;
+    download: string;
+    /**
+     * Contains the anchor portion of the URL including the hash sign (#).
+     */
+    hash: string;
+    /**
+     * Contains the hostname and port values of the URL.
+     */
+    host: string;
+    /**
+     * Contains the hostname of a URL.
+     */
+    hostname: string;
+    /**
+     * Sets or retrieves a destination URL or an anchor point.
+     */
+    href: string;
+    /**
+     * Sets or retrieves the language code of the object.
+     */
+    hreflang: string;
+    Methods: string;
+    readonly mimeType: string;
+    /**
+     * Sets or retrieves the shape of the object.
+     */
+    name: string;
+    readonly nameProp: string;
+    /**
+     * Contains the pathname of the URL.
+     */
+    pathname: string;
+    /**
+     * Sets or retrieves the port number associated with a URL.
+     */
+    port: string;
+    /**
+     * Contains the protocol of the URL.
+     */
+    protocol: string;
+    readonly protocolLong: string;
+    /**
+     * Sets or retrieves the relationship between the object and the destination of the link.
+     */
+    rel: string;
+    /**
+     * Sets or retrieves the relationship between the object and the destination of the link.
+     */
+    rev: string;
+    /**
+     * Sets or retrieves the substring of the href property that follows the question mark.
+     */
+    search: string;
+    /**
+     * Sets or retrieves the shape of the object.
+     */
+    shape: string;
+    /**
+     * Sets or retrieves the window or frame at which to target content.
+     */
+    target: string;
+    /**
+     * Retrieves or sets the text of the object as a string.
+     */
+    text: string;
+    type: string;
+    urn: string;
+    /**
+     * Returns a string representation of an object.
+     */
+    toString(): string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLAnchorElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLAnchorElement: {
+    prototype: HTMLAnchorElement;
+    new(): HTMLAnchorElement;
+};
+
+interface HTMLAppletElement extends HTMLElement {
+    align: string;
+    /**
+     * Sets or retrieves a text alternative to the graphic.
+     */
+    alt: string;
+    /**
+     * Gets or sets the optional alternative HTML script to execute if the object fails to load.
+     */
+    altHtml: string;
+    /**
+     * Sets or retrieves a character string that can be used to implement your own archive functionality for the object.
+     */
+    archive: string;
+    /**
+     * Retrieves a string of the URL where the object tag can be found. This is often the href of the document that the object is in, or the value set by a base element.
+     */
+    readonly BaseHref: string;
+    border: string;
+    code: string;
+    /**
+     * Sets or retrieves the URL of the component.
+     */
+    codeBase: string;
+    /**
+     * Sets or retrieves the Internet media type for the code associated with the object.
+     */
+    codeType: string;
+    /**
+     * Address of a pointer to the document this page or frame contains. If there is no document, then null will be returned.
+     */
+    readonly contentDocument: Document;
+    /**
+     * Sets or retrieves the URL that references the data of the object.
+     */
+    data: string;
+    /**
+     * Sets or retrieves a character string that can be used to implement your own declare functionality for the object.
+     */
+    declare: boolean;
+    readonly form: HTMLFormElement;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: string;
+    hspace: number;
+    /**
+     * Sets or retrieves the shape of the object.
+     */
+    name: string;
+    object: string | null;
+    /**
+     * Sets or retrieves a message to be displayed while an object is loading.
+     */
+    standby: string;
+    /**
+     * Returns the content type of the object.
+     */
+    type: string;
+    /**
+     * Sets or retrieves the URL, often with a bookmark extension (#name), to use as a client-side image map.
+     */
+    useMap: string;
+    vspace: number;
+    width: number;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLAppletElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLAppletElement: {
+    prototype: HTMLAppletElement;
+    new(): HTMLAppletElement;
+};
+
+interface HTMLAreaElement extends HTMLElement {
+    /**
+     * Sets or retrieves a text alternative to the graphic.
+     */
+    alt: string;
+    /**
+     * Sets or retrieves the coordinates of the object.
+     */
+    coords: string;
+    download: string;
+    /**
+     * Sets or retrieves the subsection of the href property that follows the number sign (#).
+     */
+    hash: string;
+    /**
+     * Sets or retrieves the hostname and port number of the location or URL.
+     */
+    host: string;
+    /**
+     * Sets or retrieves the host name part of the location or URL.
+     */
+    hostname: string;
+    /**
+     * Sets or retrieves a destination URL or an anchor point.
+     */
+    href: string;
+    /**
+     * Sets or gets whether clicks in this region cause action.
+     */
+    noHref: boolean;
+    /**
+     * Sets or retrieves the file name or path specified by the object.
+     */
+    pathname: string;
+    /**
+     * Sets or retrieves the port number associated with a URL.
+     */
+    port: string;
+    /**
+     * Sets or retrieves the protocol portion of a URL.
+     */
+    protocol: string;
+    rel: string;
+    /**
+     * Sets or retrieves the substring of the href property that follows the question mark.
+     */
+    search: string;
+    /**
+     * Sets or retrieves the shape of the object.
+     */
+    shape: string;
+    /**
+     * Sets or retrieves the window or frame at which to target content.
+     */
+    target: string;
+    /**
+     * Returns a string representation of an object.
+     */
+    toString(): string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLAreaElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLAreaElement: {
+    prototype: HTMLAreaElement;
+    new(): HTMLAreaElement;
+};
+
+interface HTMLAreasCollection extends HTMLCollectionBase {
+}
+
+declare var HTMLAreasCollection: {
+    prototype: HTMLAreasCollection;
+    new(): HTMLAreasCollection;
+};
+
+interface HTMLAudioElement extends HTMLMediaElement {
+    addEventListener<K extends keyof HTMLMediaElementEventMap>(type: K, listener: (this: HTMLAudioElement, ev: HTMLMediaElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLAudioElement: {
+    prototype: HTMLAudioElement;
+    new(): HTMLAudioElement;
+};
+
+interface HTMLBaseElement extends HTMLElement {
+    /**
+     * Gets or sets the baseline URL on which relative links are based.
+     */
+    href: string;
+    /**
+     * Sets or retrieves the window or frame at which to target content.
+     */
+    target: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLBaseElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLBaseElement: {
+    prototype: HTMLBaseElement;
+    new(): HTMLBaseElement;
+};
+
+interface HTMLBaseFontElement extends HTMLElement, DOML2DeprecatedColorProperty {
+    /**
+     * Sets or retrieves the current typeface family.
+     */
+    face: string;
+    /**
+     * Sets or retrieves the font size of the object.
+     */
+    size: number;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLBaseFontElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLBaseFontElement: {
+    prototype: HTMLBaseFontElement;
+    new(): HTMLBaseFontElement;
+};
+
+interface HTMLBodyElementEventMap extends HTMLElementEventMap {
+    "afterprint": Event;
+    "beforeprint": Event;
+    "beforeunload": BeforeUnloadEvent;
+    "blur": FocusEvent;
+    "error": ErrorEvent;
+    "focus": FocusEvent;
+    "hashchange": HashChangeEvent;
+    "load": Event;
+    "message": MessageEvent;
+    "offline": Event;
+    "online": Event;
+    "orientationchange": Event;
+    "pagehide": PageTransitionEvent;
+    "pageshow": PageTransitionEvent;
+    "popstate": PopStateEvent;
+    "resize": UIEvent;
+    "scroll": UIEvent;
+    "storage": StorageEvent;
+    "unload": Event;
+}
+
+interface HTMLBodyElement extends HTMLElement {
+    aLink: any;
+    background: string;
+    bgColor: any;
+    bgProperties: string;
+    link: any;
+    noWrap: boolean;
+    onafterprint: (this: HTMLBodyElement, ev: Event) => any;
+    onbeforeprint: (this: HTMLBodyElement, ev: Event) => any;
+    onbeforeunload: (this: HTMLBodyElement, ev: BeforeUnloadEvent) => any;
+    onblur: (this: HTMLBodyElement, ev: FocusEvent) => any;
+    onerror: (this: HTMLBodyElement, ev: ErrorEvent) => any;
+    onfocus: (this: HTMLBodyElement, ev: FocusEvent) => any;
+    onhashchange: (this: HTMLBodyElement, ev: HashChangeEvent) => any;
+    onload: (this: HTMLBodyElement, ev: Event) => any;
+    onmessage: (this: HTMLBodyElement, ev: MessageEvent) => any;
+    onoffline: (this: HTMLBodyElement, ev: Event) => any;
+    ononline: (this: HTMLBodyElement, ev: Event) => any;
+    onorientationchange: (this: HTMLBodyElement, ev: Event) => any;
+    onpagehide: (this: HTMLBodyElement, ev: PageTransitionEvent) => any;
+    onpageshow: (this: HTMLBodyElement, ev: PageTransitionEvent) => any;
+    onpopstate: (this: HTMLBodyElement, ev: PopStateEvent) => any;
+    onresize: (this: HTMLBodyElement, ev: UIEvent) => any;
+    onscroll: (this: HTMLBodyElement, ev: UIEvent) => any;
+    onstorage: (this: HTMLBodyElement, ev: StorageEvent) => any;
+    onunload: (this: HTMLBodyElement, ev: Event) => any;
+    text: any;
+    vLink: any;
+    addEventListener<K extends keyof HTMLBodyElementEventMap>(type: K, listener: (this: HTMLBodyElement, ev: HTMLBodyElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLBodyElement: {
+    prototype: HTMLBodyElement;
+    new(): HTMLBodyElement;
+};
+
+interface HTMLBRElement extends HTMLElement {
+    /**
+     * Sets or retrieves the side on which floating objects are not to be positioned when any IHTMLBlockElement is inserted into the document.
+     */
+    clear: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLBRElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLBRElement: {
+    prototype: HTMLBRElement;
+    new(): HTMLBRElement;
+};
+
+interface HTMLButtonElement extends HTMLElement {
+    /**
+     * Provides a way to direct a user to a specific field when a document loads. This can provide both direction and convenience for a user, reducing the need to click or tab to a field when a page opens. This attribute is true when present on an element, and false when missing.
+     */
+    autofocus: boolean;
+    disabled: boolean;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Overrides the action attribute (where the data on a form is sent) on the parent form element.
+     */
+    formAction: string;
+    /**
+     * Used to override the encoding (formEnctype attribute) specified on the form element.
+     */
+    formEnctype: string;
+    /**
+     * Overrides the submit method attribute previously specified on a form element.
+     */
+    formMethod: string;
+    /**
+     * Overrides any validation or required attributes on a form or form elements to allow it to be submitted without validation. This can be used to create a "save draft"-type submit option.
+     */
+    formNoValidate: string;
+    /**
+     * Overrides the target attribute on a form element.
+     */
+    formTarget: string;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    status: any;
+    /**
+     * Gets the classification and default behavior of the button.
+     */
+    type: string;
+    /**
+     * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
+     */
+    readonly validationMessage: string;
+    /**
+     * Returns a  ValidityState object that represents the validity states of an element.
+     */
+    readonly validity: ValidityState;
+    /**
+     * Sets or retrieves the default or selected value of the control.
+     */
+    value: string;
+    /**
+     * Returns whether an element will successfully validate based on forms validation rules and constraints.
+     */
+    readonly willValidate: boolean;
+    /**
+     * Returns whether a form will validate when it is submitted, without having to submit it.
+     */
+    checkValidity(): boolean;
+    /**
+     * Sets a custom error message that is displayed when a form is submitted.
+     * @param error Sets a custom error message that is displayed when a form is submitted.
+     */
+    setCustomValidity(error: string): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLButtonElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLButtonElement: {
+    prototype: HTMLButtonElement;
+    new(): HTMLButtonElement;
+};
+
+interface HTMLCanvasElement extends HTMLElement {
+    /**
+     * Gets or sets the height of a canvas element on a document.
+     */
+    height: number;
+    /**
+     * Gets or sets the width of a canvas element on a document.
+     */
+    width: number;
+    /**
+     * Returns an object that provides methods and properties for drawing and manipulating images and graphics on a canvas element in a document. A context object includes information about colors, line widths, fonts, and other graphic parameters that can be drawn on a canvas.
+     * @param contextId The identifier (ID) of the type of canvas to create. Internet Explorer 9 and Internet Explorer 10 support only a 2-D context using canvas.getContext("2d"); IE11 Preview also supports 3-D or WebGL context using canvas.getContext("experimental-webgl");
+     */
+    getContext(contextId: "2d", contextAttributes?: Canvas2DContextAttributes): CanvasRenderingContext2D | null;
+    getContext(contextId: "webgl" | "experimental-webgl", contextAttributes?: WebGLContextAttributes): WebGLRenderingContext | null;
+    getContext(contextId: string, contextAttributes?: {}): CanvasRenderingContext2D | WebGLRenderingContext | null;
+    /**
+     * Returns a blob object encoded as a Portable Network Graphics (PNG) format from a canvas image or drawing.
+     */
+    msToBlob(): Blob;
+    /**
+     * Returns the content of the current canvas as an image that you can use as a source for another canvas or an HTML element.
+     * @param type The standard MIME type for the image format to return. If you do not specify this parameter, the default value is a PNG format image.
+     */
+    toDataURL(type?: string, ...args: any[]): string;
+    toBlob(callback: (result: Blob | null) => void, type?: string, ...arguments: any[]): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLCanvasElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLCanvasElement: {
+    prototype: HTMLCanvasElement;
+    new(): HTMLCanvasElement;
+};
+
+interface HTMLCollectionBase {
+    /**
+     * Sets or retrieves the number of objects in a collection.
+     */
+    readonly length: number;
+    /**
+     * Retrieves an object from various collections.
+     */
+    item(index: number): Element;
+    [index: number]: Element;
+}
+
+interface HTMLCollection extends HTMLCollectionBase {
+    /**
+     * Retrieves a select object or an object from an options collection.
+     */
+    namedItem(name: string): Element | null;
+}
+
+declare var HTMLCollection: {
+    prototype: HTMLCollection;
+    new(): HTMLCollection;
+};
+
+interface HTMLDataElement extends HTMLElement {
+    value: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLDataElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLDataElement: {
+    prototype: HTMLDataElement;
+    new(): HTMLDataElement;
+};
+
+interface HTMLDataListElement extends HTMLElement {
+    options: HTMLCollectionOf<HTMLOptionElement>;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLDataListElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLDataListElement: {
+    prototype: HTMLDataListElement;
+    new(): HTMLDataListElement;
+};
+
+interface HTMLDirectoryElement extends HTMLElement {
+    compact: boolean;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLDirectoryElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLDirectoryElement: {
+    prototype: HTMLDirectoryElement;
+    new(): HTMLDirectoryElement;
+};
+
+interface HTMLDivElement extends HTMLElement {
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    /**
+     * Sets or retrieves whether the browser automatically performs wordwrap.
+     */
+    noWrap: boolean;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLDivElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLDivElement: {
+    prototype: HTMLDivElement;
+    new(): HTMLDivElement;
+};
+
+interface HTMLDListElement extends HTMLElement {
+    compact: boolean;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLDListElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLDListElement: {
+    prototype: HTMLDListElement;
+    new(): HTMLDListElement;
+};
+
+interface HTMLDocument extends Document {
+    addEventListener<K extends keyof DocumentEventMap>(type: K, listener: (this: HTMLDocument, ev: DocumentEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLDocument: {
+    prototype: HTMLDocument;
+    new(): HTMLDocument;
+};
+
+interface HTMLElementEventMap extends ElementEventMap {
+    "abort": UIEvent;
+    "activate": UIEvent;
+    "beforeactivate": UIEvent;
+    "beforecopy": ClipboardEvent;
+    "beforecut": ClipboardEvent;
+    "beforedeactivate": UIEvent;
+    "beforepaste": ClipboardEvent;
+    "blur": FocusEvent;
+    "canplay": Event;
+    "canplaythrough": Event;
+    "change": Event;
+    "click": MouseEvent;
+    "contextmenu": PointerEvent;
+    "copy": ClipboardEvent;
+    "cuechange": Event;
+    "cut": ClipboardEvent;
+    "dblclick": MouseEvent;
+    "deactivate": UIEvent;
+    "drag": DragEvent;
+    "dragend": DragEvent;
+    "dragenter": DragEvent;
+    "dragleave": DragEvent;
+    "dragover": DragEvent;
+    "dragstart": DragEvent;
+    "drop": DragEvent;
+    "durationchange": Event;
+    "emptied": Event;
+    "ended": MediaStreamErrorEvent;
+    "error": ErrorEvent;
+    "focus": FocusEvent;
+    "input": Event;
+    "invalid": Event;
+    "keydown": KeyboardEvent;
+    "keypress": KeyboardEvent;
+    "keyup": KeyboardEvent;
+    "load": Event;
+    "loadeddata": Event;
+    "loadedmetadata": Event;
+    "loadstart": Event;
+    "mousedown": MouseEvent;
+    "mouseenter": MouseEvent;
+    "mouseleave": MouseEvent;
+    "mousemove": MouseEvent;
+    "mouseout": MouseEvent;
+    "mouseover": MouseEvent;
+    "mouseup": MouseEvent;
+    "mousewheel": WheelEvent;
+    "MSContentZoom": UIEvent;
+    "MSManipulationStateChanged": MSManipulationEvent;
+    "paste": ClipboardEvent;
+    "pause": Event;
+    "play": Event;
+    "playing": Event;
+    "progress": ProgressEvent;
+    "ratechange": Event;
+    "reset": Event;
+    "scroll": UIEvent;
+    "seeked": Event;
+    "seeking": Event;
+    "select": UIEvent;
+    "selectstart": Event;
+    "stalled": Event;
+    "submit": Event;
+    "suspend": Event;
+    "timeupdate": Event;
+    "volumechange": Event;
+    "waiting": Event;
+}
+
+interface HTMLElement extends Element {
+    accessKey: string;
+    readonly children: HTMLCollection;
+    contentEditable: string;
+    readonly dataset: DOMStringMap;
+    dir: string;
+    draggable: boolean;
+    hidden: boolean;
+    hideFocus: boolean;
+    innerText: string;
+    readonly isContentEditable: boolean;
+    lang: string;
+    readonly offsetHeight: number;
+    readonly offsetLeft: number;
+    readonly offsetParent: Element;
+    readonly offsetTop: number;
+    readonly offsetWidth: number;
+    onabort: (this: HTMLElement, ev: UIEvent) => any;
+    onactivate: (this: HTMLElement, ev: UIEvent) => any;
+    onbeforeactivate: (this: HTMLElement, ev: UIEvent) => any;
+    onbeforecopy: (this: HTMLElement, ev: ClipboardEvent) => any;
+    onbeforecut: (this: HTMLElement, ev: ClipboardEvent) => any;
+    onbeforedeactivate: (this: HTMLElement, ev: UIEvent) => any;
+    onbeforepaste: (this: HTMLElement, ev: ClipboardEvent) => any;
+    onblur: (this: HTMLElement, ev: FocusEvent) => any;
+    oncanplay: (this: HTMLElement, ev: Event) => any;
+    oncanplaythrough: (this: HTMLElement, ev: Event) => any;
+    onchange: (this: HTMLElement, ev: Event) => any;
+    onclick: (this: HTMLElement, ev: MouseEvent) => any;
+    oncontextmenu: (this: HTMLElement, ev: PointerEvent) => any;
+    oncopy: (this: HTMLElement, ev: ClipboardEvent) => any;
+    oncuechange: (this: HTMLElement, ev: Event) => any;
+    oncut: (this: HTMLElement, ev: ClipboardEvent) => any;
+    ondblclick: (this: HTMLElement, ev: MouseEvent) => any;
+    ondeactivate: (this: HTMLElement, ev: UIEvent) => any;
+    ondrag: (this: HTMLElement, ev: DragEvent) => any;
+    ondragend: (this: HTMLElement, ev: DragEvent) => any;
+    ondragenter: (this: HTMLElement, ev: DragEvent) => any;
+    ondragleave: (this: HTMLElement, ev: DragEvent) => any;
+    ondragover: (this: HTMLElement, ev: DragEvent) => any;
+    ondragstart: (this: HTMLElement, ev: DragEvent) => any;
+    ondrop: (this: HTMLElement, ev: DragEvent) => any;
+    ondurationchange: (this: HTMLElement, ev: Event) => any;
+    onemptied: (this: HTMLElement, ev: Event) => any;
+    onended: (this: HTMLElement, ev: MediaStreamErrorEvent) => any;
+    onerror: (this: HTMLElement, ev: ErrorEvent) => any;
+    onfocus: (this: HTMLElement, ev: FocusEvent) => any;
+    oninput: (this: HTMLElement, ev: Event) => any;
+    oninvalid: (this: HTMLElement, ev: Event) => any;
+    onkeydown: (this: HTMLElement, ev: KeyboardEvent) => any;
+    onkeypress: (this: HTMLElement, ev: KeyboardEvent) => any;
+    onkeyup: (this: HTMLElement, ev: KeyboardEvent) => any;
+    onload: (this: HTMLElement, ev: Event) => any;
+    onloadeddata: (this: HTMLElement, ev: Event) => any;
+    onloadedmetadata: (this: HTMLElement, ev: Event) => any;
+    onloadstart: (this: HTMLElement, ev: Event) => any;
+    onmousedown: (this: HTMLElement, ev: MouseEvent) => any;
+    onmouseenter: (this: HTMLElement, ev: MouseEvent) => any;
+    onmouseleave: (this: HTMLElement, ev: MouseEvent) => any;
+    onmousemove: (this: HTMLElement, ev: MouseEvent) => any;
+    onmouseout: (this: HTMLElement, ev: MouseEvent) => any;
+    onmouseover: (this: HTMLElement, ev: MouseEvent) => any;
+    onmouseup: (this: HTMLElement, ev: MouseEvent) => any;
+    onmousewheel: (this: HTMLElement, ev: WheelEvent) => any;
+    onmscontentzoom: (this: HTMLElement, ev: UIEvent) => any;
+    onmsmanipulationstatechanged: (this: HTMLElement, ev: MSManipulationEvent) => any;
+    onpaste: (this: HTMLElement, ev: ClipboardEvent) => any;
+    onpause: (this: HTMLElement, ev: Event) => any;
+    onplay: (this: HTMLElement, ev: Event) => any;
+    onplaying: (this: HTMLElement, ev: Event) => any;
+    onprogress: (this: HTMLElement, ev: ProgressEvent) => any;
+    onratechange: (this: HTMLElement, ev: Event) => any;
+    onreset: (this: HTMLElement, ev: Event) => any;
+    onscroll: (this: HTMLElement, ev: UIEvent) => any;
+    onseeked: (this: HTMLElement, ev: Event) => any;
+    onseeking: (this: HTMLElement, ev: Event) => any;
+    onselect: (this: HTMLElement, ev: UIEvent) => any;
+    onselectstart: (this: HTMLElement, ev: Event) => any;
+    onstalled: (this: HTMLElement, ev: Event) => any;
+    onsubmit: (this: HTMLElement, ev: Event) => any;
+    onsuspend: (this: HTMLElement, ev: Event) => any;
+    ontimeupdate: (this: HTMLElement, ev: Event) => any;
+    onvolumechange: (this: HTMLElement, ev: Event) => any;
+    onwaiting: (this: HTMLElement, ev: Event) => any;
+    outerText: string;
+    spellcheck: boolean;
+    readonly style: CSSStyleDeclaration;
+    tabIndex: number;
+    title: string;
+    blur(): void;
+    click(): void;
+    dragDrop(): boolean;
+    focus(): void;
+    msGetInputContext(): MSInputMethodContext;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLElement: {
+    prototype: HTMLElement;
+    new(): HTMLElement;
+};
+
+interface HTMLEmbedElement extends HTMLElement, GetSVGDocument {
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: string;
+    hidden: any;
+    /**
+     * Gets or sets whether the DLNA PlayTo device is available.
+     */
+    msPlayToDisabled: boolean;
+    /**
+     * Gets or sets the path to the preferred media source. This enables the Play To target device to stream the media content, which can be DRM protected, from a different location, such as a cloud media server.
+     */
+    msPlayToPreferredSourceUri: string;
+    /**
+     * Gets or sets the primary DLNA PlayTo device.
+     */
+    msPlayToPrimary: boolean;
+    /**
+     * Gets the source associated with the media element for use by the PlayToManager.
+     */
+    readonly msPlayToSource: any;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    /**
+     * Retrieves the palette used for the embedded document.
+     */
+    readonly palette: string;
+    /**
+     * Retrieves the URL of the plug-in used to view an embedded document.
+     */
+    readonly pluginspage: string;
+    readonly readyState: string;
+    /**
+     * Sets or retrieves a URL to be loaded by the object.
+     */
+    src: string;
+    /**
+     * Sets or retrieves the height and width units of the embed object.
+     */
+    units: string;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLEmbedElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLEmbedElement: {
+    prototype: HTMLEmbedElement;
+    new(): HTMLEmbedElement;
+};
+
+interface HTMLFieldSetElement extends HTMLElement {
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    disabled: boolean;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    name: string;
+    /**
+     * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
+     */
+    readonly validationMessage: string;
+    /**
+     * Returns a  ValidityState object that represents the validity states of an element.
+     */
+    readonly validity: ValidityState;
+    /**
+     * Returns whether an element will successfully validate based on forms validation rules and constraints.
+     */
+    readonly willValidate: boolean;
+    /**
+     * Returns whether a form will validate when it is submitted, without having to submit it.
+     */
+    checkValidity(): boolean;
+    /**
+     * Sets a custom error message that is displayed when a form is submitted.
+     * @param error Sets a custom error message that is displayed when a form is submitted.
+     */
+    setCustomValidity(error: string): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLFieldSetElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLFieldSetElement: {
+    prototype: HTMLFieldSetElement;
+    new(): HTMLFieldSetElement;
+};
+
+interface HTMLFontElement extends HTMLElement, DOML2DeprecatedColorProperty, DOML2DeprecatedSizeProperty {
+    /**
+     * Sets or retrieves the current typeface family.
+     */
+    face: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLFontElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLFontElement: {
+    prototype: HTMLFontElement;
+    new(): HTMLFontElement;
+};
+
+interface HTMLFormControlsCollection extends HTMLCollectionBase {
+    namedItem(name: string): HTMLCollection | Element | null;
+}
+
+declare var HTMLFormControlsCollection: {
+    prototype: HTMLFormControlsCollection;
+    new(): HTMLFormControlsCollection;
+};
+
+interface HTMLFormElement extends HTMLElement {
+    /**
+     * Sets or retrieves a list of character encodings for input data that must be accepted by the server processing the form.
+     */
+    acceptCharset: string;
+    /**
+     * Sets or retrieves the URL to which the form content is sent for processing.
+     */
+    action: string;
+    /**
+     * Specifies whether autocomplete is applied to an editable text field.
+     */
+    autocomplete: string;
+    /**
+     * Retrieves a collection, in source order, of all controls in a given form.
+     */
+    readonly elements: HTMLFormControlsCollection;
+    /**
+     * Sets or retrieves the MIME encoding for the form.
+     */
+    encoding: string;
+    /**
+     * Sets or retrieves the encoding type for the form.
+     */
+    enctype: string;
+    /**
+     * Sets or retrieves the number of objects in a collection.
+     */
+    readonly length: number;
+    /**
+     * Sets or retrieves how to send the form data to the server.
+     */
+    method: string;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    /**
+     * Designates a form that is not validated when submitted.
+     */
+    noValidate: boolean;
+    /**
+     * Sets or retrieves the window or frame at which to target content.
+     */
+    target: string;
+    /**
+     * Returns whether a form will validate when it is submitted, without having to submit it.
+     */
+    checkValidity(): boolean;
+    /**
+     * Retrieves a form object or an object from an elements collection.
+     * @param name Variant of type Number or String that specifies the object or collection to retrieve. If this parameter is a Number, it is the zero-based index of the object. If this parameter is a string, all objects with matching name or id properties are retrieved, and a collection is returned if more than one match is made.
+     * @param index Variant of type Number that specifies the zero-based index of the object to retrieve when a collection is returned.
+     */
+    item(name?: any, index?: any): any;
+    /**
+     * Retrieves a form object or an object from an elements collection.
+     */
+    namedItem(name: string): any;
+    /**
+     * Fires when the user resets a form.
+     */
+    reset(): void;
+    /**
+     * Fires when a FORM is about to be submitted.
+     */
+    submit(): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLFormElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+    [name: string]: any;
+}
+
+declare var HTMLFormElement: {
+    prototype: HTMLFormElement;
+    new(): HTMLFormElement;
+};
+
+interface HTMLFrameElementEventMap extends HTMLElementEventMap {
+    "load": Event;
+}
+
+interface HTMLFrameElement extends HTMLElement, GetSVGDocument {
+    /**
+     * Specifies the properties of a border drawn around an object.
+     */
+    border: string;
+    /**
+     * Sets or retrieves the border color of the object.
+     */
+    borderColor: any;
+    /**
+     * Retrieves the document object of the page or frame.
+     */
+    readonly contentDocument: Document;
+    /**
+     * Retrieves the object of the specified.
+     */
+    readonly contentWindow: Window;
+    /**
+     * Sets or retrieves whether to display a border for the frame.
+     */
+    frameBorder: string;
+    /**
+     * Sets or retrieves the amount of additional space between the frames.
+     */
+    frameSpacing: any;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: string | number;
+    /**
+     * Sets or retrieves a URI to a long description of the object.
+     */
+    longDesc: string;
+    /**
+     * Sets or retrieves the top and bottom margin heights before displaying the text in a frame.
+     */
+    marginHeight: string;
+    /**
+     * Sets or retrieves the left and right margin widths before displaying the text in a frame.
+     */
+    marginWidth: string;
+    /**
+     * Sets or retrieves the frame name.
+     */
+    name: string;
+    /**
+     * Sets or retrieves whether the user can resize the frame.
+     */
+    noResize: boolean;
+    /**
+     * Raised when the object has been completely received from the server.
+     */
+    onload: (this: HTMLFrameElement, ev: Event) => any;
+    /**
+     * Sets or retrieves whether the frame can be scrolled.
+     */
+    scrolling: string;
+    /**
+     * Sets or retrieves a URL to be loaded by the object.
+     */
+    src: string;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: string | number;
+    addEventListener<K extends keyof HTMLFrameElementEventMap>(type: K, listener: (this: HTMLFrameElement, ev: HTMLFrameElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLFrameElement: {
+    prototype: HTMLFrameElement;
+    new(): HTMLFrameElement;
+};
+
+interface HTMLFrameSetElementEventMap extends HTMLElementEventMap {
+    "afterprint": Event;
+    "beforeprint": Event;
+    "beforeunload": BeforeUnloadEvent;
+    "blur": FocusEvent;
+    "error": ErrorEvent;
+    "focus": FocusEvent;
+    "hashchange": HashChangeEvent;
+    "load": Event;
+    "message": MessageEvent;
+    "offline": Event;
+    "online": Event;
+    "orientationchange": Event;
+    "pagehide": PageTransitionEvent;
+    "pageshow": PageTransitionEvent;
+    "popstate": PopStateEvent;
+    "resize": UIEvent;
+    "scroll": UIEvent;
+    "storage": StorageEvent;
+    "unload": Event;
+}
+
+interface HTMLFrameSetElement extends HTMLElement {
+    border: string;
+    /**
+     * Sets or retrieves the border color of the object.
+     */
+    borderColor: any;
+    /**
+     * Sets or retrieves the frame widths of the object.
+     */
+    cols: string;
+    /**
+     * Sets or retrieves whether to display a border for the frame.
+     */
+    frameBorder: string;
+    /**
+     * Sets or retrieves the amount of additional space between the frames.
+     */
+    frameSpacing: any;
+    name: string;
+    onafterprint: (this: HTMLFrameSetElement, ev: Event) => any;
+    onbeforeprint: (this: HTMLFrameSetElement, ev: Event) => any;
+    onbeforeunload: (this: HTMLFrameSetElement, ev: BeforeUnloadEvent) => any;
+    /**
+     * Fires when the object loses the input focus.
+     */
+    onblur: (this: HTMLFrameSetElement, ev: FocusEvent) => any;
+    onerror: (this: HTMLFrameSetElement, ev: ErrorEvent) => any;
+    /**
+     * Fires when the object receives focus.
+     */
+    onfocus: (this: HTMLFrameSetElement, ev: FocusEvent) => any;
+    onhashchange: (this: HTMLFrameSetElement, ev: HashChangeEvent) => any;
+    onload: (this: HTMLFrameSetElement, ev: Event) => any;
+    onmessage: (this: HTMLFrameSetElement, ev: MessageEvent) => any;
+    onoffline: (this: HTMLFrameSetElement, ev: Event) => any;
+    ononline: (this: HTMLFrameSetElement, ev: Event) => any;
+    onorientationchange: (this: HTMLFrameSetElement, ev: Event) => any;
+    onpagehide: (this: HTMLFrameSetElement, ev: PageTransitionEvent) => any;
+    onpageshow: (this: HTMLFrameSetElement, ev: PageTransitionEvent) => any;
+    onpopstate: (this: HTMLFrameSetElement, ev: PopStateEvent) => any;
+    onresize: (this: HTMLFrameSetElement, ev: UIEvent) => any;
+    onscroll: (this: HTMLFrameSetElement, ev: UIEvent) => any;
+    onstorage: (this: HTMLFrameSetElement, ev: StorageEvent) => any;
+    onunload: (this: HTMLFrameSetElement, ev: Event) => any;
+    /**
+     * Sets or retrieves the frame heights of the object.
+     */
+    rows: string;
+    addEventListener<K extends keyof HTMLFrameSetElementEventMap>(type: K, listener: (this: HTMLFrameSetElement, ev: HTMLFrameSetElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLFrameSetElement: {
+    prototype: HTMLFrameSetElement;
+    new(): HTMLFrameSetElement;
+};
+
+interface HTMLHeadElement extends HTMLElement {
+    profile: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLHeadElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLHeadElement: {
+    prototype: HTMLHeadElement;
+    new(): HTMLHeadElement;
+};
+
+interface HTMLHeadingElement extends HTMLElement {
+    /**
+     * Sets or retrieves a value that indicates the table alignment.
+     */
+    align: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLHeadingElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLHeadingElement: {
+    prototype: HTMLHeadingElement;
+    new(): HTMLHeadingElement;
+};
+
+interface HTMLHRElement extends HTMLElement, DOML2DeprecatedColorProperty, DOML2DeprecatedSizeProperty {
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    /**
+     * Sets or retrieves whether the horizontal rule is drawn with 3-D shading.
+     */
+    noShade: boolean;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: number;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLHRElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLHRElement: {
+    prototype: HTMLHRElement;
+    new(): HTMLHRElement;
+};
+
+interface HTMLHtmlElement extends HTMLElement {
+    /**
+     * Sets or retrieves the DTD version that governs the current document.
+     */
+    version: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLHtmlElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLHtmlElement: {
+    prototype: HTMLHtmlElement;
+    new(): HTMLHtmlElement;
+};
+
+interface HTMLIFrameElementEventMap extends HTMLElementEventMap {
+    "load": Event;
+}
+
+interface HTMLIFrameElement extends HTMLElement, GetSVGDocument {
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    allowFullscreen: boolean;
+    allowPaymentRequest: boolean;
+    /**
+     * Specifies the properties of a border drawn around an object.
+     */
+    border: string;
+    /**
+     * Retrieves the document object of the page or frame.
+     */
+    readonly contentDocument: Document;
+    /**
+     * Retrieves the object of the specified.
+     */
+    readonly contentWindow: Window;
+    /**
+     * Sets or retrieves whether to display a border for the frame.
+     */
+    frameBorder: string;
+    /**
+     * Sets or retrieves the amount of additional space between the frames.
+     */
+    frameSpacing: any;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: string;
+    /**
+     * Sets or retrieves the horizontal margin for the object.
+     */
+    hspace: number;
+    /**
+     * Sets or retrieves a URI to a long description of the object.
+     */
+    longDesc: string;
+    /**
+     * Sets or retrieves the top and bottom margin heights before displaying the text in a frame.
+     */
+    marginHeight: string;
+    /**
+     * Sets or retrieves the left and right margin widths before displaying the text in a frame.
+     */
+    marginWidth: string;
+    /**
+     * Sets or retrieves the frame name.
+     */
+    name: string;
+    /**
+     * Sets or retrieves whether the user can resize the frame.
+     */
+    noResize: boolean;
+    /**
+     * Raised when the object has been completely received from the server.
+     */
+    onload: (this: HTMLIFrameElement, ev: Event) => any;
+    readonly sandbox: DOMSettableTokenList;
+    /**
+     * Sets or retrieves whether the frame can be scrolled.
+     */
+    scrolling: string;
+    /**
+     * Sets or retrieves a URL to be loaded by the object.
+     */
+    src: string;
+    /**
+     * Sets or retrieves the vertical margin for the object.
+     */
+    vspace: number;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: string;
+    addEventListener<K extends keyof HTMLIFrameElementEventMap>(type: K, listener: (this: HTMLIFrameElement, ev: HTMLIFrameElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLIFrameElement: {
+    prototype: HTMLIFrameElement;
+    new(): HTMLIFrameElement;
+};
+
+interface HTMLImageElement extends HTMLElement {
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    /**
+     * Sets or retrieves a text alternative to the graphic.
+     */
+    alt: string;
+    /**
+     * Specifies the properties of a border drawn around an object.
+     */
+    border: string;
+    /**
+     * Retrieves whether the object is fully loaded.
+     */
+    readonly complete: boolean;
+    crossOrigin: string | null;
+    readonly currentSrc: string;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: number;
+    /**
+     * Sets or retrieves the width of the border to draw around the object.
+     */
+    hspace: number;
+    /**
+     * Sets or retrieves whether the image is a server-side image map.
+     */
+    isMap: boolean;
+    /**
+     * Sets or retrieves a Uniform Resource Identifier (URI) to a long description of the object.
+     */
+    longDesc: string;
+    lowsrc: string;
+    /**
+     * Gets or sets whether the DLNA PlayTo device is available.
+     */
+    msPlayToDisabled: boolean;
+    msPlayToPreferredSourceUri: string;
+    /**
+     * Gets or sets the primary DLNA PlayTo device.
+     */
+    msPlayToPrimary: boolean;
+    /**
+     * Gets the source associated with the media element for use by the PlayToManager.
+     */
+    readonly msPlayToSource: any;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    /**
+     * The original height of the image resource before sizing.
+     */
+    readonly naturalHeight: number;
+    /**
+     * The original width of the image resource before sizing.
+     */
+    readonly naturalWidth: number;
+    sizes: string;
+    /**
+     * The address or URL of the a media resource that is to be considered.
+     */
+    src: string;
+    srcset: string;
+    /**
+     * Sets or retrieves the URL, often with a bookmark extension (#name), to use as a client-side image map.
+     */
+    useMap: string;
+    /**
+     * Sets or retrieves the vertical margin for the object.
+     */
+    vspace: number;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: number;
+    readonly x: number;
+    readonly y: number;
+    msGetAsCastingSource(): any;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLImageElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLImageElement: {
+    prototype: HTMLImageElement;
+    new(): HTMLImageElement;
+};
+
+interface HTMLInputElement extends HTMLElement {
+    /**
+     * Sets or retrieves a comma-separated list of content types.
+     */
+    accept: string;
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    /**
+     * Sets or retrieves a text alternative to the graphic.
+     */
+    alt: string;
+    /**
+     * Specifies whether autocomplete is applied to an editable text field.
+     */
+    autocomplete: string;
+    /**
+     * Provides a way to direct a user to a specific field when a document loads. This can provide both direction and convenience for a user, reducing the need to click or tab to a field when a page opens. This attribute is true when present on an element, and false when missing.
+     */
+    autofocus: boolean;
+    /**
+     * Sets or retrieves the width of the border to draw around the object.
+     */
+    border: string;
+    /**
+     * Sets or retrieves the state of the check box or radio button.
+     */
+    checked: boolean;
+    /**
+     * Retrieves whether the object is fully loaded.
+     */
+    readonly complete: boolean;
+    /**
+     * Sets or retrieves the state of the check box or radio button.
+     */
+    defaultChecked: boolean;
+    /**
+     * Sets or retrieves the initial contents of the object.
+     */
+    defaultValue: string;
+    disabled: boolean;
+    /**
+     * Returns a FileList object on a file type input object.
+     */
+    readonly files: FileList | null;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Overrides the action attribute (where the data on a form is sent) on the parent form element.
+     */
+    formAction: string;
+    /**
+     * Used to override the encoding (formEnctype attribute) specified on the form element.
+     */
+    formEnctype: string;
+    /**
+     * Overrides the submit method attribute previously specified on a form element.
+     */
+    formMethod: string;
+    /**
+     * Overrides any validation or required attributes on a form or form elements to allow it to be submitted without validation. This can be used to create a "save draft"-type submit option.
+     */
+    formNoValidate: string;
+    /**
+     * Overrides the target attribute on a form element.
+     */
+    formTarget: string;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: string;
+    /**
+     * Sets or retrieves the width of the border to draw around the object.
+     */
+    hspace: number;
+    indeterminate: boolean;
+    /**
+     * Specifies the ID of a pre-defined datalist of options for an input element.
+     */
+    readonly list: HTMLElement;
+    /**
+     * Defines the maximum acceptable value for an input element with type="number".When used with the min and step attributes, lets you control the range and increment (such as only even numbers) that the user can enter into an input field.
+     */
+    max: string;
+    /**
+     * Sets or retrieves the maximum number of characters that the user can enter in a text control.
+     */
+    maxLength: number;
+    /**
+     * Defines the minimum acceptable value for an input element with type="number". When used with the max and step attributes, lets you control the range and increment (such as even numbers only) that the user can enter into an input field.
+     */
+    min: string;
+    /**
+     * Sets or retrieves the Boolean value indicating whether multiple items can be selected from a list.
+     */
+    multiple: boolean;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    /**
+     * Gets or sets a string containing a regular expression that the user's input must match.
+     */
+    pattern: string;
+    /**
+     * Gets or sets a text string that is displayed in an input field as a hint or prompt to users as the format or type of information they need to enter.The text appears in an input field until the user puts focus on the field.
+     */
+    placeholder: string;
+    readOnly: boolean;
+    /**
+     * When present, marks an element that can't be submitted without a value.
+     */
+    required: boolean;
+    selectionDirection: string;
+    /**
+     * Gets or sets the end position or offset of a text selection.
+     */
+    selectionEnd: number;
+    /**
+     * Gets or sets the starting position or offset of a text selection.
+     */
+    selectionStart: number;
+    size: number;
+    /**
+     * The address or URL of the a media resource that is to be considered.
+     */
+    src: string;
+    status: boolean;
+    /**
+     * Defines an increment or jump between values that you want to allow the user to enter. When used with the max and min attributes, lets you control the range and increment (for example, allow only even numbers) that the user can enter into an input field.
+     */
+    step: string;
+    /**
+     * Returns the content type of the object.
+     */
+    type: string;
+    /**
+     * Sets or retrieves the URL, often with a bookmark extension (#name), to use as a client-side image map.
+     */
+    useMap: string;
+    /**
+     * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
+     */
+    readonly validationMessage: string;
+    /**
+     * Returns a  ValidityState object that represents the validity states of an element.
+     */
+    readonly validity: ValidityState;
+    /**
+     * Returns the value of the data at the cursor's current position.
+     */
+    value: string;
+    valueAsDate: Date;
+    /**
+     * Returns the input field value as a number.
+     */
+    valueAsNumber: number;
+    /**
+     * Sets or retrieves the vertical margin for the object.
+     */
+    vspace: number;
+    webkitdirectory: boolean;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: string;
+    /**
+     * Returns whether an element will successfully validate based on forms validation rules and constraints.
+     */
+    readonly willValidate: boolean;
+    minLength: number;
+    /**
+     * Returns whether a form will validate when it is submitted, without having to submit it.
+     */
+    checkValidity(): boolean;
+    /**
+     * Makes the selection equal to the current object.
+     */
+    select(): void;
+    /**
+     * Sets a custom error message that is displayed when a form is submitted.
+     * @param error Sets a custom error message that is displayed when a form is submitted.
+     */
+    setCustomValidity(error: string): void;
+    /**
+     * Sets the start and end positions of a selection in a text field.
+     * @param start The offset into the text field for the start of the selection.
+     * @param end The offset into the text field for the end of the selection.
+     */
+    setSelectionRange(start?: number, end?: number, direction?: string): void;
+    /**
+     * Decrements a range input control's value by the value given by the Step attribute. If the optional parameter is used, it will decrement the input control's step value multiplied by the parameter's value.
+     * @param n Value to decrement the value by.
+     */
+    stepDown(n?: number): void;
+    /**
+     * Increments a range input control's value by the value given by the Step attribute. If the optional parameter is used, will increment the input control's value by that value.
+     * @param n Value to increment the value by.
+     */
+    stepUp(n?: number): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLInputElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLInputElement: {
+    prototype: HTMLInputElement;
+    new(): HTMLInputElement;
+};
+
+interface HTMLLabelElement extends HTMLElement {
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Sets or retrieves the object to which the given label object is assigned.
+     */
+    htmlFor: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLLabelElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLLabelElement: {
+    prototype: HTMLLabelElement;
+    new(): HTMLLabelElement;
+};
+
+interface HTMLLegendElement extends HTMLElement {
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    align: string;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLLegendElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLLegendElement: {
+    prototype: HTMLLegendElement;
+    new(): HTMLLegendElement;
+};
+
+interface HTMLLIElement extends HTMLElement {
+    type: string;
+    /**
+     * Sets or retrieves the value of a list item.
+     */
+    value: number;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLLIElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLLIElement: {
+    prototype: HTMLLIElement;
+    new(): HTMLLIElement;
+};
+
+interface HTMLLinkElement extends HTMLElement, LinkStyle {
+    /**
+     * Sets or retrieves the character set used to encode the object.
+     */
+    charset: string;
+    disabled: boolean;
+    /**
+     * Sets or retrieves a destination URL or an anchor point.
+     */
+    href: string;
+    /**
+     * Sets or retrieves the language code of the object.
+     */
+    hreflang: string;
+    /**
+     * Sets or retrieves the media type.
+     */
+    media: string;
+    /**
+     * Sets or retrieves the relationship between the object and the destination of the link.
+     */
+    rel: string;
+    /**
+     * Sets or retrieves the relationship between the object and the destination of the link.
+     */
+    rev: string;
+    /**
+     * Sets or retrieves the window or frame at which to target content.
+     */
+    target: string;
+    /**
+     * Sets or retrieves the MIME type of the object.
+     */
+    type: string;
+    import?: Document;
+    integrity: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLLinkElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLLinkElement: {
+    prototype: HTMLLinkElement;
+    new(): HTMLLinkElement;
+};
+
+interface HTMLMapElement extends HTMLElement {
+    /**
+     * Retrieves a collection of the area objects defined for the given map object.
+     */
+    readonly areas: HTMLAreasCollection;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLMapElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLMapElement: {
+    prototype: HTMLMapElement;
+    new(): HTMLMapElement;
+};
+
+interface HTMLMarqueeElementEventMap extends HTMLElementEventMap {
+    "bounce": Event;
+    "finish": Event;
+    "start": Event;
+}
+
+interface HTMLMarqueeElement extends HTMLElement {
+    behavior: string;
+    bgColor: any;
+    direction: string;
+    height: string;
+    hspace: number;
+    loop: number;
+    onbounce: (this: HTMLMarqueeElement, ev: Event) => any;
+    onfinish: (this: HTMLMarqueeElement, ev: Event) => any;
+    onstart: (this: HTMLMarqueeElement, ev: Event) => any;
+    scrollAmount: number;
+    scrollDelay: number;
+    trueSpeed: boolean;
+    vspace: number;
+    width: string;
+    start(): void;
+    stop(): void;
+    addEventListener<K extends keyof HTMLMarqueeElementEventMap>(type: K, listener: (this: HTMLMarqueeElement, ev: HTMLMarqueeElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLMarqueeElement: {
+    prototype: HTMLMarqueeElement;
+    new(): HTMLMarqueeElement;
+};
+
+interface HTMLMediaElementEventMap extends HTMLElementEventMap {
+    "encrypted": MediaEncryptedEvent;
+    "msneedkey": MSMediaKeyNeededEvent;
+}
+
+interface HTMLMediaElement extends HTMLElement {
+    /**
+     * Returns an AudioTrackList object with the audio tracks for a given video element.
+     */
+    readonly audioTracks: AudioTrackList;
+    /**
+     * Gets or sets a value that indicates whether to start playing the media automatically.
+     */
+    autoplay: boolean;
+    /**
+     * Gets a collection of buffered time ranges.
+     */
+    readonly buffered: TimeRanges;
+    /**
+     * Gets or sets a flag that indicates whether the client provides a set of controls for the media (in case the developer does not include controls for the player).
+     */
+    controls: boolean;
+    crossOrigin: string | null;
+    /**
+     * Gets the address or URL of the current media resource that is selected by IHTMLMediaElement.
+     */
+    readonly currentSrc: string;
+    /**
+     * Gets or sets the current playback position, in seconds.
+     */
+    currentTime: number;
+    defaultMuted: boolean;
+    /**
+     * Gets or sets the default playback rate when the user is not using fast forward or reverse for a video or audio resource.
+     */
+    defaultPlaybackRate: number;
+    /**
+     * Returns the duration in seconds of the current media resource. A NaN value is returned if duration is not available, or Infinity if the media resource is streaming.
+     */
+    readonly duration: number;
+    /**
+     * Gets information about whether the playback has ended or not.
+     */
+    readonly ended: boolean;
+    /**
+     * Returns an object representing the current error state of the audio or video element.
+     */
+    readonly error: MediaError;
+    /**
+     * Gets or sets a flag to specify whether playback should restart after it completes.
+     */
+    loop: boolean;
+    readonly mediaKeys: MediaKeys | null;
+    /**
+     * Specifies the purpose of the audio or video media, such as background audio or alerts.
+     */
+    msAudioCategory: string;
+    /**
+     * Specifies the output device id that the audio will be sent to.
+     */
+    msAudioDeviceType: string;
+    readonly msGraphicsTrustStatus: MSGraphicsTrust;
+    /**
+     * Gets the MSMediaKeys object, which is used for decrypting media data, that is associated with this media element.
+     */
+    readonly msKeys: MSMediaKeys;
+    /**
+     * Gets or sets whether the DLNA PlayTo device is available.
+     */
+    msPlayToDisabled: boolean;
+    /**
+     * Gets or sets the path to the preferred media source. This enables the Play To target device to stream the media content, which can be DRM protected, from a different location, such as a cloud media server.
+     */
+    msPlayToPreferredSourceUri: string;
+    /**
+     * Gets or sets the primary DLNA PlayTo device.
+     */
+    msPlayToPrimary: boolean;
+    /**
+     * Gets the source associated with the media element for use by the PlayToManager.
+     */
+    readonly msPlayToSource: any;
+    /**
+     * Specifies whether or not to enable low-latency playback on the media element.
+     */
+    msRealTime: boolean;
+    /**
+     * Gets or sets a flag that indicates whether the audio (either audio or the audio track on video media) is muted.
+     */
+    muted: boolean;
+    /**
+     * Gets the current network activity for the element.
+     */
+    readonly networkState: number;
+    onencrypted: (this: HTMLMediaElement, ev: MediaEncryptedEvent) => any;
+    onmsneedkey: (this: HTMLMediaElement, ev: MSMediaKeyNeededEvent) => any;
+    /**
+     * Gets a flag that specifies whether playback is paused.
+     */
+    readonly paused: boolean;
+    /**
+     * Gets or sets the current rate of speed for the media resource to play. This speed is expressed as a multiple of the normal speed of the media resource.
+     */
+    playbackRate: number;
+    /**
+     * Gets TimeRanges for the current media resource that has been played.
+     */
+    readonly played: TimeRanges;
+    /**
+     * Gets or sets the current playback position, in seconds.
+     */
+    preload: string;
+    readyState: number;
+    /**
+     * Returns a TimeRanges object that represents the ranges of the current media resource that can be seeked.
+     */
+    readonly seekable: TimeRanges;
+    /**
+     * Gets a flag that indicates whether the the client is currently moving to a new playback position in the media resource.
+     */
+    readonly seeking: boolean;
+    /**
+     * The address or URL of the a media resource that is to be considered.
+     */
+    src: string;
+    srcObject: MediaStream | null;
+    readonly textTracks: TextTrackList;
+    readonly videoTracks: VideoTrackList;
+    /**
+     * Gets or sets the volume level for audio portions of the media element.
+     */
+    volume: number;
+    addTextTrack(kind: string, label?: string, language?: string): TextTrack;
+    /**
+     * Returns a string that specifies whether the client can play a given media resource type.
+     */
+    canPlayType(type: string): string;
+    /**
+     * Resets the audio or video object and loads a new media resource.
+     */
+    load(): void;
+    /**
+     * Clears all effects from the media pipeline.
+     */
+    msClearEffects(): void;
+    msGetAsCastingSource(): any;
+    /**
+     * Inserts the specified audio effect into media pipeline.
+     */
+    msInsertAudioEffect(activatableClassId: string, effectRequired: boolean, config?: any): void;
+    msSetMediaKeys(mediaKeys: MSMediaKeys): void;
+    /**
+     * Specifies the media protection manager for a given media pipeline.
+     */
+    msSetMediaProtectionManager(mediaProtectionManager?: any): void;
+    /**
+     * Pauses the current playback and sets paused to TRUE. This can be used to test whether the media is playing or paused. You can also use the pause or play events to tell whether the media is playing or not.
+     */
+    pause(): void;
+    /**
+     * Loads and starts playback of a media resource.
+     */
+    play(): Promise<void>;
+    setMediaKeys(mediaKeys: MediaKeys | null): Promise<void>;
+    readonly HAVE_CURRENT_DATA: number;
+    readonly HAVE_ENOUGH_DATA: number;
+    readonly HAVE_FUTURE_DATA: number;
+    readonly HAVE_METADATA: number;
+    readonly HAVE_NOTHING: number;
+    readonly NETWORK_EMPTY: number;
+    readonly NETWORK_IDLE: number;
+    readonly NETWORK_LOADING: number;
+    readonly NETWORK_NO_SOURCE: number;
+    addEventListener<K extends keyof HTMLMediaElementEventMap>(type: K, listener: (this: HTMLMediaElement, ev: HTMLMediaElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLMediaElement: {
+    prototype: HTMLMediaElement;
+    new(): HTMLMediaElement;
+    readonly HAVE_CURRENT_DATA: number;
+    readonly HAVE_ENOUGH_DATA: number;
+    readonly HAVE_FUTURE_DATA: number;
+    readonly HAVE_METADATA: number;
+    readonly HAVE_NOTHING: number;
+    readonly NETWORK_EMPTY: number;
+    readonly NETWORK_IDLE: number;
+    readonly NETWORK_LOADING: number;
+    readonly NETWORK_NO_SOURCE: number;
+};
+
+interface HTMLMenuElement extends HTMLElement {
+    compact: boolean;
+    type: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLMenuElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLMenuElement: {
+    prototype: HTMLMenuElement;
+    new(): HTMLMenuElement;
+};
+
+interface HTMLMetaElement extends HTMLElement {
+    /**
+     * Sets or retrieves the character set used to encode the object.
+     */
+    charset: string;
+    /**
+     * Gets or sets meta-information to associate with httpEquiv or name.
+     */
+    content: string;
+    /**
+     * Gets or sets information used to bind the value of a content attribute of a meta element to an HTTP response header.
+     */
+    httpEquiv: string;
+    /**
+     * Sets or retrieves the value specified in the content attribute of the meta object.
+     */
+    name: string;
+    /**
+     * Sets or retrieves a scheme to be used in interpreting the value of a property specified for the object.
+     */
+    scheme: string;
+    /**
+     * Sets or retrieves the URL property that will be loaded after the specified time has elapsed.
+     */
+    url: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLMetaElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLMetaElement: {
+    prototype: HTMLMetaElement;
+    new(): HTMLMetaElement;
+};
+
+interface HTMLMeterElement extends HTMLElement {
+    high: number;
+    low: number;
+    max: number;
+    min: number;
+    optimum: number;
+    value: number;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLMeterElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLMeterElement: {
+    prototype: HTMLMeterElement;
+    new(): HTMLMeterElement;
+};
+
+interface HTMLModElement extends HTMLElement {
+    /**
+     * Sets or retrieves reference information about the object.
+     */
+    cite: string;
+    /**
+     * Sets or retrieves the date and time of a modification to the object.
+     */
+    dateTime: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLModElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLModElement: {
+    prototype: HTMLModElement;
+    new(): HTMLModElement;
+};
+
+interface HTMLObjectElement extends HTMLElement, GetSVGDocument {
+    align: string;
+    /**
+     * Sets or retrieves a text alternative to the graphic.
+     */
+    alt: string;
+    /**
+     * Gets or sets the optional alternative HTML script to execute if the object fails to load.
+     */
+    altHtml: string;
+    /**
+     * Sets or retrieves a character string that can be used to implement your own archive functionality for the object.
+     */
+    archive: string;
+    /**
+     * Retrieves a string of the URL where the object tag can be found. This is often the href of the document that the object is in, or the value set by a base element.
+     */
+    readonly BaseHref: string;
+    border: string;
+    /**
+     * Sets or retrieves the URL of the file containing the compiled Java class.
+     */
+    code: string;
+    /**
+     * Sets or retrieves the URL of the component.
+     */
+    codeBase: string;
+    /**
+     * Sets or retrieves the Internet media type for the code associated with the object.
+     */
+    codeType: string;
+    /**
+     * Retrieves the document object of the page or frame.
+     */
+    readonly contentDocument: Document;
+    /**
+     * Sets or retrieves the URL that references the data of the object.
+     */
+    data: string;
+    declare: boolean;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: string;
+    hspace: number;
+    /**
+     * Gets or sets whether the DLNA PlayTo device is available.
+     */
+    msPlayToDisabled: boolean;
+    /**
+     * Gets or sets the path to the preferred media source. This enables the Play To target device to stream the media content, which can be DRM protected, from a different location, such as a cloud media server.
+     */
+    msPlayToPreferredSourceUri: string;
+    /**
+     * Gets or sets the primary DLNA PlayTo device.
+     */
+    msPlayToPrimary: boolean;
+    /**
+     * Gets the source associated with the media element for use by the PlayToManager.
+     */
+    readonly msPlayToSource: any;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    readonly readyState: number;
+    /**
+     * Sets or retrieves a message to be displayed while an object is loading.
+     */
+    standby: string;
+    /**
+     * Sets or retrieves the MIME type of the object.
+     */
+    type: string;
+    /**
+     * Sets or retrieves the URL, often with a bookmark extension (#name), to use as a client-side image map.
+     */
+    useMap: string;
+    /**
+     * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
+     */
+    readonly validationMessage: string;
+    /**
+     * Returns a  ValidityState object that represents the validity states of an element.
+     */
+    readonly validity: ValidityState;
+    vspace: number;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: string;
+    /**
+     * Returns whether an element will successfully validate based on forms validation rules and constraints.
+     */
+    readonly willValidate: boolean;
+    /**
+     * Returns whether a form will validate when it is submitted, without having to submit it.
+     */
+    checkValidity(): boolean;
+    /**
+     * Sets a custom error message that is displayed when a form is submitted.
+     * @param error Sets a custom error message that is displayed when a form is submitted.
+     */
+    setCustomValidity(error: string): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLObjectElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLObjectElement: {
+    prototype: HTMLObjectElement;
+    new(): HTMLObjectElement;
+};
+
+interface HTMLOListElement extends HTMLElement {
+    compact: boolean;
+    /**
+     * The starting number.
+     */
+    start: number;
+    type: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLOListElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLOListElement: {
+    prototype: HTMLOListElement;
+    new(): HTMLOListElement;
+};
+
+interface HTMLOptGroupElement extends HTMLElement {
+    /**
+     * Sets or retrieves the status of an option.
+     */
+    defaultSelected: boolean;
+    disabled: boolean;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Sets or retrieves the ordinal position of an option in a list box.
+     */
+    readonly index: number;
+    /**
+     * Sets or retrieves a value that you can use to implement your own label functionality for the object.
+     */
+    label: string;
+    /**
+     * Sets or retrieves whether the option in the list box is the default item.
+     */
+    selected: boolean;
+    /**
+     * Sets or retrieves the text string specified by the option tag.
+     */
+    readonly text: string;
+    /**
+     * Sets or retrieves the value which is returned to the server when the form control is submitted.
+     */
+    value: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLOptGroupElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLOptGroupElement: {
+    prototype: HTMLOptGroupElement;
+    new(): HTMLOptGroupElement;
+};
+
+interface HTMLOptionElement extends HTMLElement {
+    /**
+     * Sets or retrieves the status of an option.
+     */
+    defaultSelected: boolean;
+    disabled: boolean;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Sets or retrieves the ordinal position of an option in a list box.
+     */
+    readonly index: number;
+    /**
+     * Sets or retrieves a value that you can use to implement your own label functionality for the object.
+     */
+    label: string;
+    /**
+     * Sets or retrieves whether the option in the list box is the default item.
+     */
+    selected: boolean;
+    /**
+     * Sets or retrieves the text string specified by the option tag.
+     */
+    text: string;
+    /**
+     * Sets or retrieves the value which is returned to the server when the form control is submitted.
+     */
+    value: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLOptionElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLOptionElement: {
+    prototype: HTMLOptionElement;
+    new(): HTMLOptionElement;
+};
+
+interface HTMLOptionsCollection extends HTMLCollectionOf<HTMLOptionElement> {
+    length: number;
+    selectedIndex: number;
+    add(element: HTMLOptionElement | HTMLOptGroupElement, before?: HTMLElement | number): void;
+    remove(index: number): void;
+}
+
+declare var HTMLOptionsCollection: {
+    prototype: HTMLOptionsCollection;
+    new(): HTMLOptionsCollection;
+};
+
+interface HTMLOutputElement extends HTMLElement {
+    defaultValue: string;
+    readonly form: HTMLFormElement;
+    readonly htmlFor: DOMSettableTokenList;
+    name: string;
+    readonly type: string;
+    readonly validationMessage: string;
+    readonly validity: ValidityState;
+    value: string;
+    readonly willValidate: boolean;
+    checkValidity(): boolean;
+    reportValidity(): boolean;
+    setCustomValidity(error: string): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLOutputElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLOutputElement: {
+    prototype: HTMLOutputElement;
+    new(): HTMLOutputElement;
+};
+
+interface HTMLParagraphElement extends HTMLElement {
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    clear: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLParagraphElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLParagraphElement: {
+    prototype: HTMLParagraphElement;
+    new(): HTMLParagraphElement;
+};
+
+interface HTMLParamElement extends HTMLElement {
+    /**
+     * Sets or retrieves the name of an input parameter for an element.
+     */
+    name: string;
+    /**
+     * Sets or retrieves the content type of the resource designated by the value attribute.
+     */
+    type: string;
+    /**
+     * Sets or retrieves the value of an input parameter for an element.
+     */
+    value: string;
+    /**
+     * Sets or retrieves the data type of the value attribute.
+     */
+    valueType: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLParamElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLParamElement: {
+    prototype: HTMLParamElement;
+    new(): HTMLParamElement;
+};
+
+interface HTMLPictureElement extends HTMLElement {
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLPictureElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLPictureElement: {
+    prototype: HTMLPictureElement;
+    new(): HTMLPictureElement;
+};
+
+interface HTMLPreElement extends HTMLElement {
+    /**
+     * Sets or gets a value that you can use to implement your own width functionality for the object.
+     */
+    width: number;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLPreElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLPreElement: {
+    prototype: HTMLPreElement;
+    new(): HTMLPreElement;
+};
+
+interface HTMLProgressElement extends HTMLElement {
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Defines the maximum, or "done" value for a progress element.
+     */
+    max: number;
+    /**
+     * Returns the quotient of value/max when the value attribute is set (determinate progress bar), or -1 when the value attribute is missing (indeterminate progress bar).
+     */
+    readonly position: number;
+    /**
+     * Sets or gets the current value of a progress element. The value must be a non-negative number between 0 and the max value.
+     */
+    value: number;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLProgressElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLProgressElement: {
+    prototype: HTMLProgressElement;
+    new(): HTMLProgressElement;
+};
+
+interface HTMLQuoteElement extends HTMLElement {
+    /**
+     * Sets or retrieves reference information about the object.
+     */
+    cite: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLQuoteElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLQuoteElement: {
+    prototype: HTMLQuoteElement;
+    new(): HTMLQuoteElement;
+};
+
+interface HTMLScriptElement extends HTMLElement {
+    async: boolean;
+    /**
+     * Sets or retrieves the character set used to encode the object.
+     */
+    charset: string;
+    crossOrigin: string | null;
+    /**
+     * Sets or retrieves the status of the script.
+     */
+    defer: boolean;
+    /**
+     * Sets or retrieves the event for which the script is written.
+     */
+    event: string;
+    /**
+     * Sets or retrieves the object that is bound to the event script.
+     */
+    htmlFor: string;
+    /**
+     * Retrieves the URL to an external file that contains the source code or data.
+     */
+    src: string;
+    /**
+     * Retrieves or sets the text of the object as a string.
+     */
+    text: string;
+    /**
+     * Sets or retrieves the MIME type for the associated scripting engine.
+     */
+    type: string;
+    integrity: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLScriptElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLScriptElement: {
+    prototype: HTMLScriptElement;
+    new(): HTMLScriptElement;
+};
+
+interface HTMLSelectElement extends HTMLElement {
+    /**
+     * Provides a way to direct a user to a specific field when a document loads. This can provide both direction and convenience for a user, reducing the need to click or tab to a field when a page opens. This attribute is true when present on an element, and false when missing.
+     */
+    autofocus: boolean;
+    disabled: boolean;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Sets or retrieves the number of objects in a collection.
+     */
+    length: number;
+    /**
+     * Sets or retrieves the Boolean value indicating whether multiple items can be selected from a list.
+     */
+    multiple: boolean;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    readonly options: HTMLOptionsCollection;
+    /**
+     * When present, marks an element that can't be submitted without a value.
+     */
+    required: boolean;
+    /**
+     * Sets or retrieves the index of the selected option in a select object.
+     */
+    selectedIndex: number;
+    selectedOptions: HTMLCollectionOf<HTMLOptionElement>;
+    /**
+     * Sets or retrieves the number of rows in the list box.
+     */
+    size: number;
+    /**
+     * Retrieves the type of select control based on the value of the MULTIPLE attribute.
+     */
+    readonly type: string;
+    /**
+     * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
+     */
+    readonly validationMessage: string;
+    /**
+     * Returns a  ValidityState object that represents the validity states of an element.
+     */
+    readonly validity: ValidityState;
+    /**
+     * Sets or retrieves the value which is returned to the server when the form control is submitted.
+     */
+    value: string;
+    /**
+     * Returns whether an element will successfully validate based on forms validation rules and constraints.
+     */
+    readonly willValidate: boolean;
+    /**
+     * Adds an element to the areas, controlRange, or options collection.
+     * @param element Variant of type Number that specifies the index position in the collection where the element is placed. If no value is given, the method places the element at the end of the collection.
+     * @param before Variant of type Object that specifies an element to insert before, or null to append the object to the collection.
+     */
+    add(element: HTMLElement, before?: HTMLElement | number): void;
+    /**
+     * Returns whether a form will validate when it is submitted, without having to submit it.
+     */
+    checkValidity(): boolean;
+    /**
+     * Retrieves a select object or an object from an options collection.
+     * @param name Variant of type Number or String that specifies the object or collection to retrieve. If this parameter is an integer, it is the zero-based index of the object. If this parameter is a string, all objects with matching name or id properties are retrieved, and a collection is returned if more than one match is made.
+     * @param index Variant of type Number that specifies the zero-based index of the object to retrieve when a collection is returned.
+     */
+    item(name?: any, index?: any): any;
+    /**
+     * Retrieves a select object or an object from an options collection.
+     * @param namedItem A String that specifies the name or id property of the object to retrieve. A collection is returned if more than one match is made.
+     */
+    namedItem(name: string): any;
+    /**
+     * Removes an element from the collection.
+     * @param index Number that specifies the zero-based index of the element to remove from the collection.
+     */
+    remove(index?: number): void;
+    /**
+     * Sets a custom error message that is displayed when a form is submitted.
+     * @param error Sets a custom error message that is displayed when a form is submitted.
+     */
+    setCustomValidity(error: string): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLSelectElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+    [name: string]: any;
+}
+
+declare var HTMLSelectElement: {
+    prototype: HTMLSelectElement;
+    new(): HTMLSelectElement;
+};
+
+interface HTMLSourceElement extends HTMLElement {
+    /**
+     * Gets or sets the intended media type of the media source.
+     */
+    media: string;
+    msKeySystem: string;
+    sizes: string;
+    /**
+     * The address or URL of the a media resource that is to be considered.
+     */
+    src: string;
+    srcset: string;
+    /**
+     * Gets or sets the MIME type of a media resource.
+     */
+    type: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLSourceElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLSourceElement: {
+    prototype: HTMLSourceElement;
+    new(): HTMLSourceElement;
+};
+
+interface HTMLSpanElement extends HTMLElement {
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLSpanElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLSpanElement: {
+    prototype: HTMLSpanElement;
+    new(): HTMLSpanElement;
+};
+
+interface HTMLStyleElement extends HTMLElement, LinkStyle {
+    disabled: boolean;
+    /**
+     * Sets or retrieves the media type.
+     */
+    media: string;
+    /**
+     * Retrieves the CSS language in which the style sheet is written.
+     */
+    type: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLStyleElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLStyleElement: {
+    prototype: HTMLStyleElement;
+    new(): HTMLStyleElement;
+};
+
+interface HTMLTableCaptionElement extends HTMLElement {
+    /**
+     * Sets or retrieves the alignment of the caption or legend.
+     */
+    align: string;
+    /**
+     * Sets or retrieves whether the caption appears at the top or bottom of the table.
+     */
+    vAlign: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTableCaptionElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTableCaptionElement: {
+    prototype: HTMLTableCaptionElement;
+    new(): HTMLTableCaptionElement;
+};
+
+interface HTMLTableCellElement extends HTMLElement, HTMLTableAlignment {
+    /**
+     * Sets or retrieves abbreviated text for the object.
+     */
+    abbr: string;
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    /**
+     * Sets or retrieves a comma-delimited list of conceptual categories associated with the object.
+     */
+    axis: string;
+    bgColor: any;
+    /**
+     * Retrieves the position of the object in the cells collection of a row.
+     */
+    readonly cellIndex: number;
+    /**
+     * Sets or retrieves the number columns in the table that the object should span.
+     */
+    colSpan: number;
+    /**
+     * Sets or retrieves a list of header cells that provide information for the object.
+     */
+    headers: string;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: any;
+    /**
+     * Sets or retrieves whether the browser automatically performs wordwrap.
+     */
+    noWrap: boolean;
+    /**
+     * Sets or retrieves how many rows in a table the cell should span.
+     */
+    rowSpan: number;
+    /**
+     * Sets or retrieves the group of cells in a table to which the object's information applies.
+     */
+    scope: string;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTableCellElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTableCellElement: {
+    prototype: HTMLTableCellElement;
+    new(): HTMLTableCellElement;
+};
+
+interface HTMLTableColElement extends HTMLElement, HTMLTableAlignment {
+    /**
+     * Sets or retrieves the alignment of the object relative to the display or table.
+     */
+    align: string;
+    /**
+     * Sets or retrieves the number of columns in the group.
+     */
+    span: number;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: any;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTableColElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTableColElement: {
+    prototype: HTMLTableColElement;
+    new(): HTMLTableColElement;
+};
+
+interface HTMLTableDataCellElement extends HTMLTableCellElement {
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTableDataCellElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTableDataCellElement: {
+    prototype: HTMLTableDataCellElement;
+    new(): HTMLTableDataCellElement;
+};
+
+interface HTMLTableElement extends HTMLElement {
+    /**
+     * Sets or retrieves a value that indicates the table alignment.
+     */
+    align: string;
+    bgColor: any;
+    /**
+     * Sets or retrieves the width of the border to draw around the object.
+     */
+    border: string;
+    /**
+     * Sets or retrieves the border color of the object.
+     */
+    borderColor: any;
+    /**
+     * Retrieves the caption object of a table.
+     */
+    caption: HTMLTableCaptionElement;
+    /**
+     * Sets or retrieves the amount of space between the border of the cell and the content of the cell.
+     */
+    cellPadding: string;
+    /**
+     * Sets or retrieves the amount of space between cells in a table.
+     */
+    cellSpacing: string;
+    /**
+     * Sets or retrieves the number of columns in the table.
+     */
+    cols: number;
+    /**
+     * Sets or retrieves the way the border frame around the table is displayed.
+     */
+    frame: string;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: any;
+    /**
+     * Sets or retrieves the number of horizontal rows contained in the object.
+     */
+    rows: HTMLCollectionOf<HTMLTableRowElement>;
+    /**
+     * Sets or retrieves which dividing lines (inner borders) are displayed.
+     */
+    rules: string;
+    /**
+     * Sets or retrieves a description and/or structure of the object.
+     */
+    summary: string;
+    /**
+     * Retrieves a collection of all tBody objects in the table. Objects in this collection are in source order.
+     */
+    tBodies: HTMLCollectionOf<HTMLTableSectionElement>;
+    /**
+     * Retrieves the tFoot object of the table.
+     */
+    tFoot: HTMLTableSectionElement;
+    /**
+     * Retrieves the tHead object of the table.
+     */
+    tHead: HTMLTableSectionElement;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: string;
+    /**
+     * Creates an empty caption element in the table.
+     */
+    createCaption(): HTMLTableCaptionElement;
+    /**
+     * Creates an empty tBody element in the table.
+     */
+    createTBody(): HTMLTableSectionElement;
+    /**
+     * Creates an empty tFoot element in the table.
+     */
+    createTFoot(): HTMLTableSectionElement;
+    /**
+     * Returns the tHead element object if successful, or null otherwise.
+     */
+    createTHead(): HTMLTableSectionElement;
+    /**
+     * Deletes the caption element and its contents from the table.
+     */
+    deleteCaption(): void;
+    /**
+     * Removes the specified row (tr) from the element and from the rows collection.
+     * @param index Number that specifies the zero-based position in the rows collection of the row to remove.
+     */
+    deleteRow(index?: number): void;
+    /**
+     * Deletes the tFoot element and its contents from the table.
+     */
+    deleteTFoot(): void;
+    /**
+     * Deletes the tHead element and its contents from the table.
+     */
+    deleteTHead(): void;
+    /**
+     * Creates a new row (tr) in the table, and adds the row to the rows collection.
+     * @param index Number that specifies where to insert the row in the rows collection. The default value is -1, which appends the new row to the end of the rows collection.
+     */
+    insertRow(index?: number): HTMLTableRowElement;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTableElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTableElement: {
+    prototype: HTMLTableElement;
+    new(): HTMLTableElement;
+};
+
+interface HTMLTableHeaderCellElement extends HTMLTableCellElement {
+    /**
+     * Sets or retrieves the group of cells in a table to which the object's information applies.
+     */
+    scope: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTableHeaderCellElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTableHeaderCellElement: {
+    prototype: HTMLTableHeaderCellElement;
+    new(): HTMLTableHeaderCellElement;
+};
+
+interface HTMLTableRowElement extends HTMLElement, HTMLTableAlignment {
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    bgColor: any;
+    /**
+     * Retrieves a collection of all cells in the table row.
+     */
+    cells: HTMLCollectionOf<HTMLTableDataCellElement | HTMLTableHeaderCellElement>;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: any;
+    /**
+     * Retrieves the position of the object in the rows collection for the table.
+     */
+    readonly rowIndex: number;
+    /**
+     * Retrieves the position of the object in the collection.
+     */
+    readonly sectionRowIndex: number;
+    /**
+     * Removes the specified cell from the table row, as well as from the cells collection.
+     * @param index Number that specifies the zero-based position of the cell to remove from the table row. If no value is provided, the last cell in the cells collection is deleted.
+     */
+    deleteCell(index?: number): void;
+    /**
+     * Creates a new cell in the table row, and adds the cell to the cells collection.
+     * @param index Number that specifies where to insert the cell in the tr. The default value is -1, which appends the new cell to the end of the cells collection.
+     */
+    insertCell(index?: number): HTMLTableDataCellElement;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTableRowElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTableRowElement: {
+    prototype: HTMLTableRowElement;
+    new(): HTMLTableRowElement;
+};
+
+interface HTMLTableSectionElement extends HTMLElement, HTMLTableAlignment {
+    /**
+     * Sets or retrieves a value that indicates the table alignment.
+     */
+    align: string;
+    /**
+     * Sets or retrieves the number of horizontal rows contained in the object.
+     */
+    rows: HTMLCollectionOf<HTMLTableRowElement>;
+    /**
+     * Removes the specified row (tr) from the element and from the rows collection.
+     * @param index Number that specifies the zero-based position in the rows collection of the row to remove.
+     */
+    deleteRow(index?: number): void;
+    /**
+     * Creates a new row (tr) in the table, and adds the row to the rows collection.
+     * @param index Number that specifies where to insert the row in the rows collection. The default value is -1, which appends the new row to the end of the rows collection.
+     */
+    insertRow(index?: number): HTMLTableRowElement;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTableSectionElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTableSectionElement: {
+    prototype: HTMLTableSectionElement;
+    new(): HTMLTableSectionElement;
+};
+
+interface HTMLTemplateElement extends HTMLElement {
+    readonly content: DocumentFragment;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTemplateElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTemplateElement: {
+    prototype: HTMLTemplateElement;
+    new(): HTMLTemplateElement;
+};
+
+interface HTMLTextAreaElement extends HTMLElement {
+    /**
+     * Provides a way to direct a user to a specific field when a document loads. This can provide both direction and convenience for a user, reducing the need to click or tab to a field when a page opens. This attribute is true when present on an element, and false when missing.
+     */
+    autofocus: boolean;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    cols: number;
+    /**
+     * Sets or retrieves the initial contents of the object.
+     */
+    defaultValue: string;
+    disabled: boolean;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Sets or retrieves the maximum number of characters that the user can enter in a text control.
+     */
+    maxLength: number;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    /**
+     * Gets or sets a text string that is displayed in an input field as a hint or prompt to users as the format or type of information they need to enter.The text appears in an input field until the user puts focus on the field.
+     */
+    placeholder: string;
+    /**
+     * Sets or retrieves the value indicated whether the content of the object is read-only.
+     */
+    readOnly: boolean;
+    /**
+     * When present, marks an element that can't be submitted without a value.
+     */
+    required: boolean;
+    /**
+     * Sets or retrieves the number of horizontal rows contained in the object.
+     */
+    rows: number;
+    /**
+     * Gets or sets the end position or offset of a text selection.
+     */
+    selectionEnd: number;
+    /**
+     * Gets or sets the starting position or offset of a text selection.
+     */
+    selectionStart: number;
+    /**
+     * Sets or retrieves the value indicating whether the control is selected.
+     */
+    status: any;
+    /**
+     * Retrieves the type of control.
+     */
+    readonly type: string;
+    /**
+     * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
+     */
+    readonly validationMessage: string;
+    /**
+     * Returns a  ValidityState object that represents the validity states of an element.
+     */
+    readonly validity: ValidityState;
+    /**
+     * Retrieves or sets the text in the entry field of the textArea element.
+     */
+    value: string;
+    /**
+     * Returns whether an element will successfully validate based on forms validation rules and constraints.
+     */
+    readonly willValidate: boolean;
+    /**
+     * Sets or retrieves how to handle wordwrapping in the object.
+     */
+    wrap: string;
+    minLength: number;
+    /**
+     * Returns whether a form will validate when it is submitted, without having to submit it.
+     */
+    checkValidity(): boolean;
+    /**
+     * Highlights the input area of a form element.
+     */
+    select(): void;
+    /**
+     * Sets a custom error message that is displayed when a form is submitted.
+     * @param error Sets a custom error message that is displayed when a form is submitted.
+     */
+    setCustomValidity(error: string): void;
+    /**
+     * Sets the start and end positions of a selection in a text field.
+     * @param start The offset into the text field for the start of the selection.
+     * @param end The offset into the text field for the end of the selection.
+     */
+    setSelectionRange(start: number, end: number): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTextAreaElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTextAreaElement: {
+    prototype: HTMLTextAreaElement;
+    new(): HTMLTextAreaElement;
+};
+
+interface HTMLTimeElement extends HTMLElement {
+    dateTime: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTimeElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTimeElement: {
+    prototype: HTMLTimeElement;
+    new(): HTMLTimeElement;
+};
+
+interface HTMLTitleElement extends HTMLElement {
+    /**
+     * Retrieves or sets the text of the object as a string.
+     */
+    text: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTitleElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTitleElement: {
+    prototype: HTMLTitleElement;
+    new(): HTMLTitleElement;
+};
+
+interface HTMLTrackElement extends HTMLElement {
+    default: boolean;
+    kind: string;
+    label: string;
+    readonly readyState: number;
+    src: string;
+    srclang: string;
+    readonly track: TextTrack;
+    readonly ERROR: number;
+    readonly LOADED: number;
+    readonly LOADING: number;
+    readonly NONE: number;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTrackElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTrackElement: {
+    prototype: HTMLTrackElement;
+    new(): HTMLTrackElement;
+    readonly ERROR: number;
+    readonly LOADED: number;
+    readonly LOADING: number;
+    readonly NONE: number;
+};
+
+interface HTMLUListElement extends HTMLElement {
+    compact: boolean;
+    type: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLUListElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLUListElement: {
+    prototype: HTMLUListElement;
+    new(): HTMLUListElement;
+};
+
+interface HTMLUnknownElement extends HTMLElement {
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLUnknownElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLUnknownElement: {
+    prototype: HTMLUnknownElement;
+    new(): HTMLUnknownElement;
+};
+
+interface HTMLVideoElementEventMap extends HTMLMediaElementEventMap {
+    "MSVideoFormatChanged": Event;
+    "MSVideoFrameStepCompleted": Event;
+    "MSVideoOptimalLayoutChanged": Event;
+}
+
+interface HTMLVideoElement extends HTMLMediaElement {
+    /**
+     * Gets or sets the height of the video element.
+     */
+    height: number;
+    msHorizontalMirror: boolean;
+    readonly msIsLayoutOptimalForPlayback: boolean;
+    readonly msIsStereo3D: boolean;
+    msStereo3DPackingMode: string;
+    msStereo3DRenderMode: string;
+    msZoom: boolean;
+    onMSVideoFormatChanged: (this: HTMLVideoElement, ev: Event) => any;
+    onMSVideoFrameStepCompleted: (this: HTMLVideoElement, ev: Event) => any;
+    onMSVideoOptimalLayoutChanged: (this: HTMLVideoElement, ev: Event) => any;
+    /**
+     * Gets or sets a URL of an image to display, for example, like a movie poster. This can be a still frame from the video, or another image if no video data is available.
+     */
+    poster: string;
+    /**
+     * Gets the intrinsic height of a video in CSS pixels, or zero if the dimensions are not known.
+     */
+    readonly videoHeight: number;
+    /**
+     * Gets the intrinsic width of a video in CSS pixels, or zero if the dimensions are not known.
+     */
+    readonly videoWidth: number;
+    readonly webkitDisplayingFullscreen: boolean;
+    readonly webkitSupportsFullscreen: boolean;
+    /**
+     * Gets or sets the width of the video element.
+     */
+    width: number;
+    getVideoPlaybackQuality(): VideoPlaybackQuality;
+    msFrameStep(forward: boolean): void;
+    msInsertVideoEffect(activatableClassId: string, effectRequired: boolean, config?: any): void;
+    msSetVideoRectangle(left: number, top: number, right: number, bottom: number): void;
+    webkitEnterFullscreen(): void;
+    webkitEnterFullScreen(): void;
+    webkitExitFullscreen(): void;
+    webkitExitFullScreen(): void;
+    addEventListener<K extends keyof HTMLVideoElementEventMap>(type: K, listener: (this: HTMLVideoElement, ev: HTMLVideoElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLVideoElement: {
+    prototype: HTMLVideoElement;
+    new(): HTMLVideoElement;
+};
+
+interface IDBCursor {
+    readonly direction: IDBCursorDirection;
+    key: IDBKeyRange | IDBValidKey;
+    readonly primaryKey: any;
+    source: IDBObjectStore | IDBIndex;
+    advance(count: number): void;
+    continue(key?: IDBKeyRange | IDBValidKey): void;
+    delete(): IDBRequest;
+    update(value: any): IDBRequest;
+    readonly NEXT: string;
+    readonly NEXT_NO_DUPLICATE: string;
+    readonly PREV: string;
+    readonly PREV_NO_DUPLICATE: string;
+}
+
+declare var IDBCursor: {
+    prototype: IDBCursor;
+    new(): IDBCursor;
+    readonly NEXT: string;
+    readonly NEXT_NO_DUPLICATE: string;
+    readonly PREV: string;
+    readonly PREV_NO_DUPLICATE: string;
+};
+
+interface IDBCursorWithValue extends IDBCursor {
+    readonly value: any;
+}
+
+declare var IDBCursorWithValue: {
+    prototype: IDBCursorWithValue;
+    new(): IDBCursorWithValue;
+};
+
+interface IDBDatabaseEventMap {
+    "abort": Event;
+    "error": Event;
+}
+
+interface IDBDatabase extends EventTarget {
+    readonly name: string;
+    readonly objectStoreNames: DOMStringList;
+    onabort: (this: IDBDatabase, ev: Event) => any;
+    onerror: (this: IDBDatabase, ev: Event) => any;
+    version: number;
+    onversionchange: (ev: IDBVersionChangeEvent) => any;
+    close(): void;
+    createObjectStore(name: string, optionalParameters?: IDBObjectStoreParameters): IDBObjectStore;
+    deleteObjectStore(name: string): void;
+    transaction(storeNames: string | string[], mode?: IDBTransactionMode): IDBTransaction;
+    addEventListener(type: "versionchange", listener: (ev: IDBVersionChangeEvent) => any, useCapture?: boolean): void;
+    addEventListener<K extends keyof IDBDatabaseEventMap>(type: K, listener: (this: IDBDatabase, ev: IDBDatabaseEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var IDBDatabase: {
+    prototype: IDBDatabase;
+    new(): IDBDatabase;
+};
+
+interface IDBFactory {
+    cmp(first: any, second: any): number;
+    deleteDatabase(name: string): IDBOpenDBRequest;
+    open(name: string, version?: number): IDBOpenDBRequest;
+}
+
+declare var IDBFactory: {
+    prototype: IDBFactory;
+    new(): IDBFactory;
+};
+
+interface IDBIndex {
+    keyPath: string | string[];
+    readonly name: string;
+    readonly objectStore: IDBObjectStore;
+    readonly unique: boolean;
+    multiEntry: boolean;
+    count(key?: IDBKeyRange | IDBValidKey): IDBRequest;
+    get(key: IDBKeyRange | IDBValidKey): IDBRequest;
+    getKey(key: IDBKeyRange | IDBValidKey): IDBRequest;
+    openCursor(range?: IDBKeyRange | IDBValidKey, direction?: IDBCursorDirection): IDBRequest;
+    openKeyCursor(range?: IDBKeyRange | IDBValidKey, direction?: IDBCursorDirection): IDBRequest;
+}
+
+declare var IDBIndex: {
+    prototype: IDBIndex;
+    new(): IDBIndex;
+};
+
+interface IDBKeyRange {
+    readonly lower: any;
+    readonly lowerOpen: boolean;
+    readonly upper: any;
+    readonly upperOpen: boolean;
+}
+
+declare var IDBKeyRange: {
+    prototype: IDBKeyRange;
+    new(): IDBKeyRange;
+    bound(lower: any, upper: any, lowerOpen?: boolean, upperOpen?: boolean): IDBKeyRange;
+    lowerBound(lower: any, open?: boolean): IDBKeyRange;
+    only(value: any): IDBKeyRange;
+    upperBound(upper: any, open?: boolean): IDBKeyRange;
+};
+
+interface IDBObjectStore {
+    readonly indexNames: DOMStringList;
+    keyPath: string | string[];
+    readonly name: string;
+    readonly transaction: IDBTransaction;
+    autoIncrement: boolean;
+    add(value: any, key?: IDBKeyRange | IDBValidKey): IDBRequest;
+    clear(): IDBRequest;
+    count(key?: IDBKeyRange | IDBValidKey): IDBRequest;
+    createIndex(name: string, keyPath: string | string[], optionalParameters?: IDBIndexParameters): IDBIndex;
+    delete(key: IDBKeyRange | IDBValidKey): IDBRequest;
+    deleteIndex(indexName: string): void;
+    get(key: any): IDBRequest;
+    index(name: string): IDBIndex;
+    openCursor(range?: IDBKeyRange | IDBValidKey, direction?: IDBCursorDirection): IDBRequest;
+    put(value: any, key?: IDBKeyRange | IDBValidKey): IDBRequest;
+}
+
+declare var IDBObjectStore: {
+    prototype: IDBObjectStore;
+    new(): IDBObjectStore;
+};
+
+interface IDBOpenDBRequestEventMap extends IDBRequestEventMap {
+    "blocked": Event;
+    "upgradeneeded": IDBVersionChangeEvent;
+}
+
+interface IDBOpenDBRequest extends IDBRequest {
+    onblocked: (this: IDBOpenDBRequest, ev: Event) => any;
+    onupgradeneeded: (this: IDBOpenDBRequest, ev: IDBVersionChangeEvent) => any;
+    addEventListener<K extends keyof IDBOpenDBRequestEventMap>(type: K, listener: (this: IDBOpenDBRequest, ev: IDBOpenDBRequestEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var IDBOpenDBRequest: {
+    prototype: IDBOpenDBRequest;
+    new(): IDBOpenDBRequest;
+};
+
+interface IDBRequestEventMap {
+    "error": Event;
+    "success": Event;
+}
+
+interface IDBRequest extends EventTarget {
+    readonly error: DOMException;
+    onerror: (this: IDBRequest, ev: Event) => any;
+    onsuccess: (this: IDBRequest, ev: Event) => any;
+    readonly readyState: IDBRequestReadyState;
+    readonly result: any;
+    source: IDBObjectStore | IDBIndex | IDBCursor;
+    readonly transaction: IDBTransaction;
+    addEventListener<K extends keyof IDBRequestEventMap>(type: K, listener: (this: IDBRequest, ev: IDBRequestEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var IDBRequest: {
+    prototype: IDBRequest;
+    new(): IDBRequest;
+};
+
+interface IDBTransactionEventMap {
+    "abort": Event;
+    "complete": Event;
+    "error": Event;
+}
+
+interface IDBTransaction extends EventTarget {
+    readonly db: IDBDatabase;
+    readonly error: DOMException;
+    readonly mode: IDBTransactionMode;
+    onabort: (this: IDBTransaction, ev: Event) => any;
+    oncomplete: (this: IDBTransaction, ev: Event) => any;
+    onerror: (this: IDBTransaction, ev: Event) => any;
+    abort(): void;
+    objectStore(name: string): IDBObjectStore;
+    readonly READ_ONLY: string;
+    readonly READ_WRITE: string;
+    readonly VERSION_CHANGE: string;
+    addEventListener<K extends keyof IDBTransactionEventMap>(type: K, listener: (this: IDBTransaction, ev: IDBTransactionEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var IDBTransaction: {
+    prototype: IDBTransaction;
+    new(): IDBTransaction;
+    readonly READ_ONLY: string;
+    readonly READ_WRITE: string;
+    readonly VERSION_CHANGE: string;
+};
+
+interface IDBVersionChangeEvent extends Event {
+    readonly newVersion: number | null;
+    readonly oldVersion: number;
+}
+
+declare var IDBVersionChangeEvent: {
+    prototype: IDBVersionChangeEvent;
+    new(): IDBVersionChangeEvent;
+};
+
+interface IIRFilterNode extends AudioNode {
+    getFrequencyResponse(frequencyHz: Float32Array, magResponse: Float32Array, phaseResponse: Float32Array): void;
+}
+
+declare var IIRFilterNode: {
+    prototype: IIRFilterNode;
+    new(): IIRFilterNode;
+};
+
+interface ImageData {
+    data: Uint8ClampedArray;
+    readonly height: number;
+    readonly width: number;
+}
+
+declare var ImageData: {
+    prototype: ImageData;
+    new(width: number, height: number): ImageData;
+    new(array: Uint8ClampedArray, width: number, height: number): ImageData;
+};
+
+interface IntersectionObserver {
+    readonly root: Element | null;
+    readonly rootMargin: string;
+    readonly thresholds: number[];
+    disconnect(): void;
+    observe(target: Element): void;
+    takeRecords(): IntersectionObserverEntry[];
+    unobserve(target: Element): void;
+}
+
+declare var IntersectionObserver: {
+    prototype: IntersectionObserver;
+    new(callback: IntersectionObserverCallback, options?: IntersectionObserverInit): IntersectionObserver;
+};
+
+interface IntersectionObserverEntry {
+    readonly boundingClientRect: ClientRect;
+    readonly intersectionRatio: number;
+    readonly intersectionRect: ClientRect;
+    readonly rootBounds: ClientRect;
+    readonly target: Element;
+    readonly time: number;
+}
+
+declare var IntersectionObserverEntry: {
+    prototype: IntersectionObserverEntry;
+    new(intersectionObserverEntryInit: IntersectionObserverEntryInit): IntersectionObserverEntry;
+};
+
+interface KeyboardEvent extends UIEvent {
+    readonly altKey: boolean;
+    readonly char: string | null;
+    readonly charCode: number;
+    readonly ctrlKey: boolean;
+    readonly key: string;
+    readonly keyCode: number;
+    readonly locale: string;
+    readonly location: number;
+    readonly metaKey: boolean;
+    readonly repeat: boolean;
+    readonly shiftKey: boolean;
+    readonly which: number;
+    readonly code: string;
+    getModifierState(keyArg: string): boolean;
+    initKeyboardEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, keyArg: string, locationArg: number, modifiersListArg: string, repeat: boolean, locale: string): void;
+    readonly DOM_KEY_LOCATION_JOYSTICK: number;
+    readonly DOM_KEY_LOCATION_LEFT: number;
+    readonly DOM_KEY_LOCATION_MOBILE: number;
+    readonly DOM_KEY_LOCATION_NUMPAD: number;
+    readonly DOM_KEY_LOCATION_RIGHT: number;
+    readonly DOM_KEY_LOCATION_STANDARD: number;
+}
+
+declare var KeyboardEvent: {
+    prototype: KeyboardEvent;
+    new(typeArg: string, eventInitDict?: KeyboardEventInit): KeyboardEvent;
+    readonly DOM_KEY_LOCATION_JOYSTICK: number;
+    readonly DOM_KEY_LOCATION_LEFT: number;
+    readonly DOM_KEY_LOCATION_MOBILE: number;
+    readonly DOM_KEY_LOCATION_NUMPAD: number;
+    readonly DOM_KEY_LOCATION_RIGHT: number;
+    readonly DOM_KEY_LOCATION_STANDARD: number;
+};
+
+interface ListeningStateChangedEvent extends Event {
+    readonly label: string;
+    readonly state: ListeningState;
+}
+
+declare var ListeningStateChangedEvent: {
+    prototype: ListeningStateChangedEvent;
+    new(): ListeningStateChangedEvent;
+};
+
+interface Location {
+    hash: string;
+    host: string;
+    hostname: string;
+    href: string;
+    readonly origin: string;
+    pathname: string;
+    port: string;
+    protocol: string;
+    search: string;
+    assign(url: string): void;
+    reload(forcedReload?: boolean): void;
+    replace(url: string): void;
+    toString(): string;
+}
+
+declare var Location: {
+    prototype: Location;
+    new(): Location;
+};
+
+interface LongRunningScriptDetectedEvent extends Event {
+    readonly executionTime: number;
+    stopPageScriptExecution: boolean;
+}
+
+declare var LongRunningScriptDetectedEvent: {
+    prototype: LongRunningScriptDetectedEvent;
+    new(): LongRunningScriptDetectedEvent;
+};
+
+interface MediaDeviceInfo {
+    readonly deviceId: string;
+    readonly groupId: string;
+    readonly kind: MediaDeviceKind;
+    readonly label: string;
+}
+
+declare var MediaDeviceInfo: {
+    prototype: MediaDeviceInfo;
+    new(): MediaDeviceInfo;
+};
+
+interface MediaDevicesEventMap {
+    "devicechange": Event;
+}
+
+interface MediaDevices extends EventTarget {
+    ondevicechange: (this: MediaDevices, ev: Event) => any;
+    enumerateDevices(): any;
+    getSupportedConstraints(): MediaTrackSupportedConstraints;
+    getUserMedia(constraints: MediaStreamConstraints): Promise<MediaStream>;
+    addEventListener<K extends keyof MediaDevicesEventMap>(type: K, listener: (this: MediaDevices, ev: MediaDevicesEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MediaDevices: {
+    prototype: MediaDevices;
+    new(): MediaDevices;
+};
+
+interface MediaElementAudioSourceNode extends AudioNode {
+}
+
+declare var MediaElementAudioSourceNode: {
+    prototype: MediaElementAudioSourceNode;
+    new(): MediaElementAudioSourceNode;
+};
+
+interface MediaEncryptedEvent extends Event {
+    readonly initData: ArrayBuffer | null;
+    readonly initDataType: string;
+}
+
+declare var MediaEncryptedEvent: {
+    prototype: MediaEncryptedEvent;
+    new(type: string, eventInitDict?: MediaEncryptedEventInit): MediaEncryptedEvent;
+};
+
+interface MediaError {
+    readonly code: number;
+    readonly msExtendedCode: number;
+    readonly MEDIA_ERR_ABORTED: number;
+    readonly MEDIA_ERR_DECODE: number;
+    readonly MEDIA_ERR_NETWORK: number;
+    readonly MEDIA_ERR_SRC_NOT_SUPPORTED: number;
+    readonly MS_MEDIA_ERR_ENCRYPTED: number;
+}
+
+declare var MediaError: {
+    prototype: MediaError;
+    new(): MediaError;
+    readonly MEDIA_ERR_ABORTED: number;
+    readonly MEDIA_ERR_DECODE: number;
+    readonly MEDIA_ERR_NETWORK: number;
+    readonly MEDIA_ERR_SRC_NOT_SUPPORTED: number;
+    readonly MS_MEDIA_ERR_ENCRYPTED: number;
+};
+
+interface MediaKeyMessageEvent extends Event {
+    readonly message: ArrayBuffer;
+    readonly messageType: MediaKeyMessageType;
+}
+
+declare var MediaKeyMessageEvent: {
+    prototype: MediaKeyMessageEvent;
+    new(type: string, eventInitDict?: MediaKeyMessageEventInit): MediaKeyMessageEvent;
+};
+
+interface MediaKeys {
+    createSession(sessionType?: MediaKeySessionType): MediaKeySession;
+    setServerCertificate(serverCertificate: any): Promise<void>;
+}
+
+declare var MediaKeys: {
+    prototype: MediaKeys;
+    new(): MediaKeys;
+};
+
+interface MediaKeySession extends EventTarget {
+    readonly closed: Promise<void>;
+    readonly expiration: number;
+    readonly keyStatuses: MediaKeyStatusMap;
+    readonly sessionId: string;
+    close(): Promise<void>;
+    generateRequest(initDataType: string, initData: any): Promise<void>;
+    load(sessionId: string): Promise<boolean>;
+    remove(): Promise<void>;
+    update(response: any): Promise<void>;
+}
+
+declare var MediaKeySession: {
+    prototype: MediaKeySession;
+    new(): MediaKeySession;
+};
+
+interface MediaKeyStatusMap {
+    readonly size: number;
+    forEach(callback: ForEachCallback): void;
+    get(keyId: any): MediaKeyStatus;
+    has(keyId: any): boolean;
+}
+
+declare var MediaKeyStatusMap: {
+    prototype: MediaKeyStatusMap;
+    new(): MediaKeyStatusMap;
+};
+
+interface MediaKeySystemAccess {
+    readonly keySystem: string;
+    createMediaKeys(): Promise<MediaKeys>;
+    getConfiguration(): MediaKeySystemConfiguration;
+}
+
+declare var MediaKeySystemAccess: {
+    prototype: MediaKeySystemAccess;
+    new(): MediaKeySystemAccess;
+};
+
+interface MediaList {
+    readonly length: number;
+    mediaText: string;
+    appendMedium(newMedium: string): void;
+    deleteMedium(oldMedium: string): void;
+    item(index: number): string;
+    toString(): string;
+    [index: number]: string;
+}
+
+declare var MediaList: {
+    prototype: MediaList;
+    new(): MediaList;
+};
+
+interface MediaQueryList {
+    readonly matches: boolean;
+    readonly media: string;
+    addListener(listener: MediaQueryListListener): void;
+    removeListener(listener: MediaQueryListListener): void;
+}
+
+declare var MediaQueryList: {
+    prototype: MediaQueryList;
+    new(): MediaQueryList;
+};
+
+interface MediaSource extends EventTarget {
+    readonly activeSourceBuffers: SourceBufferList;
+    duration: number;
+    readonly readyState: string;
+    readonly sourceBuffers: SourceBufferList;
+    addSourceBuffer(type: string): SourceBuffer;
+    endOfStream(error?: number): void;
+    removeSourceBuffer(sourceBuffer: SourceBuffer): void;
+}
+
+declare var MediaSource: {
+    prototype: MediaSource;
+    new(): MediaSource;
+    isTypeSupported(type: string): boolean;
+};
+
+interface MediaStreamEventMap {
+    "active": Event;
+    "addtrack": MediaStreamTrackEvent;
+    "inactive": Event;
+    "removetrack": MediaStreamTrackEvent;
+}
+
+interface MediaStream extends EventTarget {
+    readonly active: boolean;
+    readonly id: string;
+    onactive: (this: MediaStream, ev: Event) => any;
+    onaddtrack: (this: MediaStream, ev: MediaStreamTrackEvent) => any;
+    oninactive: (this: MediaStream, ev: Event) => any;
+    onremovetrack: (this: MediaStream, ev: MediaStreamTrackEvent) => any;
+    addTrack(track: MediaStreamTrack): void;
+    clone(): MediaStream;
+    getAudioTracks(): MediaStreamTrack[];
+    getTrackById(trackId: string): MediaStreamTrack | null;
+    getTracks(): MediaStreamTrack[];
+    getVideoTracks(): MediaStreamTrack[];
+    removeTrack(track: MediaStreamTrack): void;
+    stop(): void;
+    addEventListener<K extends keyof MediaStreamEventMap>(type: K, listener: (this: MediaStream, ev: MediaStreamEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MediaStream: {
+    prototype: MediaStream;
+    new(streamOrTracks?: MediaStream | MediaStreamTrack[]): MediaStream;
+};
+
+interface MediaStreamAudioSourceNode extends AudioNode {
+}
+
+declare var MediaStreamAudioSourceNode: {
+    prototype: MediaStreamAudioSourceNode;
+    new(): MediaStreamAudioSourceNode;
+};
+
+interface MediaStreamError {
+    readonly constraintName: string | null;
+    readonly message: string | null;
+    readonly name: string;
+}
+
+declare var MediaStreamError: {
+    prototype: MediaStreamError;
+    new(): MediaStreamError;
+};
+
+interface MediaStreamErrorEvent extends Event {
+    readonly error: MediaStreamError | null;
+}
+
+declare var MediaStreamErrorEvent: {
+    prototype: MediaStreamErrorEvent;
+    new(typeArg: string, eventInitDict?: MediaStreamErrorEventInit): MediaStreamErrorEvent;
+};
+
+interface MediaStreamEvent extends Event {
+    readonly stream: MediaStream | null;
+}
+
+declare var MediaStreamEvent: {
+    prototype: MediaStreamEvent;
+    new(type: string, eventInitDict: MediaStreamEventInit): MediaStreamEvent;
+};
+
+interface MediaStreamTrackEventMap {
+    "ended": MediaStreamErrorEvent;
+    "mute": Event;
+    "overconstrained": MediaStreamErrorEvent;
+    "unmute": Event;
+}
+
+interface MediaStreamTrack extends EventTarget {
+    enabled: boolean;
+    readonly id: string;
+    readonly kind: string;
+    readonly label: string;
+    readonly muted: boolean;
+    onended: (this: MediaStreamTrack, ev: MediaStreamErrorEvent) => any;
+    onmute: (this: MediaStreamTrack, ev: Event) => any;
+    onoverconstrained: (this: MediaStreamTrack, ev: MediaStreamErrorEvent) => any;
+    onunmute: (this: MediaStreamTrack, ev: Event) => any;
+    readonly readonly: boolean;
+    readonly readyState: MediaStreamTrackState;
+    readonly remote: boolean;
+    applyConstraints(constraints: MediaTrackConstraints): Promise<void>;
+    clone(): MediaStreamTrack;
+    getCapabilities(): MediaTrackCapabilities;
+    getConstraints(): MediaTrackConstraints;
+    getSettings(): MediaTrackSettings;
+    stop(): void;
+    addEventListener<K extends keyof MediaStreamTrackEventMap>(type: K, listener: (this: MediaStreamTrack, ev: MediaStreamTrackEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MediaStreamTrack: {
+    prototype: MediaStreamTrack;
+    new(): MediaStreamTrack;
+};
+
+interface MediaStreamTrackEvent extends Event {
+    readonly track: MediaStreamTrack;
+}
+
+declare var MediaStreamTrackEvent: {
+    prototype: MediaStreamTrackEvent;
+    new(typeArg: string, eventInitDict?: MediaStreamTrackEventInit): MediaStreamTrackEvent;
+};
+
+interface MessageChannel {
+    readonly port1: MessagePort;
+    readonly port2: MessagePort;
+}
+
+declare var MessageChannel: {
+    prototype: MessageChannel;
+    new(): MessageChannel;
+};
+
+interface MessageEvent extends Event {
+    readonly data: any;
+    readonly origin: string;
+    readonly ports: any;
+    readonly source: Window;
+    initMessageEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, dataArg: any, originArg: string, lastEventIdArg: string, sourceArg: Window): void;
+}
+
+declare var MessageEvent: {
+    prototype: MessageEvent;
+    new(type: string, eventInitDict?: MessageEventInit): MessageEvent;
+};
+
+interface MessagePortEventMap {
+    "message": MessageEvent;
+}
+
+interface MessagePort extends EventTarget {
+    onmessage: (this: MessagePort, ev: MessageEvent) => any;
+    close(): void;
+    postMessage(message?: any, transfer?: any[]): void;
+    start(): void;
+    addEventListener<K extends keyof MessagePortEventMap>(type: K, listener: (this: MessagePort, ev: MessagePortEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MessagePort: {
+    prototype: MessagePort;
+    new(): MessagePort;
+};
+
+interface MimeType {
+    readonly description: string;
+    readonly enabledPlugin: Plugin;
+    readonly suffixes: string;
+    readonly type: string;
+}
+
+declare var MimeType: {
+    prototype: MimeType;
+    new(): MimeType;
+};
+
+interface MimeTypeArray {
+    readonly length: number;
+    item(index: number): Plugin;
+    namedItem(type: string): Plugin;
+    [index: number]: Plugin;
+}
+
+declare var MimeTypeArray: {
+    prototype: MimeTypeArray;
+    new(): MimeTypeArray;
+};
+
+interface MouseEvent extends UIEvent {
+    readonly altKey: boolean;
+    readonly button: number;
+    readonly buttons: number;
+    readonly clientX: number;
+    readonly clientY: number;
+    readonly ctrlKey: boolean;
+    readonly fromElement: Element;
+    readonly layerX: number;
+    readonly layerY: number;
+    readonly metaKey: boolean;
+    readonly movementX: number;
+    readonly movementY: number;
+    readonly offsetX: number;
+    readonly offsetY: number;
+    readonly pageX: number;
+    readonly pageY: number;
+    readonly relatedTarget: EventTarget;
+    readonly screenX: number;
+    readonly screenY: number;
+    readonly shiftKey: boolean;
+    readonly toElement: Element;
+    readonly which: number;
+    readonly x: number;
+    readonly y: number;
+    getModifierState(keyArg: string): boolean;
+    initMouseEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, ctrlKeyArg: boolean, altKeyArg: boolean, shiftKeyArg: boolean, metaKeyArg: boolean, buttonArg: number, relatedTargetArg: EventTarget | null): void;
+}
+
+declare var MouseEvent: {
+    prototype: MouseEvent;
+    new(typeArg: string, eventInitDict?: MouseEventInit): MouseEvent;
+};
+
+interface MSApp {
+    clearTemporaryWebDataAsync(): MSAppAsyncOperation;
+    createBlobFromRandomAccessStream(type: string, seeker: any): Blob;
+    createDataPackage(object: any): any;
+    createDataPackageFromSelection(): any;
+    createFileFromStorageFile(storageFile: any): File;
+    createStreamFromInputStream(type: string, inputStream: any): MSStream;
+    execAsyncAtPriority(asynchronousCallback: MSExecAtPriorityFunctionCallback, priority: string, ...args: any[]): void;
+    execAtPriority(synchronousCallback: MSExecAtPriorityFunctionCallback, priority: string, ...args: any[]): any;
+    getCurrentPriority(): string;
+    getHtmlPrintDocumentSourceAsync(htmlDoc: any): Promise<any>;
+    getViewId(view: any): any;
+    isTaskScheduledAtPriorityOrHigher(priority: string): boolean;
+    pageHandlesAllApplicationActivations(enabled: boolean): void;
+    suppressSubdownloadCredentialPrompts(suppress: boolean): void;
+    terminateApp(exceptionObject: any): void;
+    readonly CURRENT: string;
+    readonly HIGH: string;
+    readonly IDLE: string;
+    readonly NORMAL: string;
+}
+declare var MSApp: MSApp;
+
+interface MSAppAsyncOperationEventMap {
+    "complete": Event;
+    "error": Event;
+}
+
+interface MSAppAsyncOperation extends EventTarget {
+    readonly error: DOMError;
+    oncomplete: (this: MSAppAsyncOperation, ev: Event) => any;
+    onerror: (this: MSAppAsyncOperation, ev: Event) => any;
+    readonly readyState: number;
+    readonly result: any;
+    start(): void;
+    readonly COMPLETED: number;
+    readonly ERROR: number;
+    readonly STARTED: number;
+    addEventListener<K extends keyof MSAppAsyncOperationEventMap>(type: K, listener: (this: MSAppAsyncOperation, ev: MSAppAsyncOperationEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MSAppAsyncOperation: {
+    prototype: MSAppAsyncOperation;
+    new(): MSAppAsyncOperation;
+    readonly COMPLETED: number;
+    readonly ERROR: number;
+    readonly STARTED: number;
+};
+
+interface MSAssertion {
+    readonly id: string;
+    readonly type: MSCredentialType;
+}
+
+declare var MSAssertion: {
+    prototype: MSAssertion;
+    new(): MSAssertion;
+};
+
+interface MSBlobBuilder {
+    append(data: any, endings?: string): void;
+    getBlob(contentType?: string): Blob;
+}
+
+declare var MSBlobBuilder: {
+    prototype: MSBlobBuilder;
+    new(): MSBlobBuilder;
+};
+
+interface MSCredentials {
+    getAssertion(challenge: string, filter?: MSCredentialFilter, params?: MSSignatureParameters): Promise<MSAssertion>;
+    makeCredential(accountInfo: MSAccountInfo, params: MSCredentialParameters[], challenge?: string): Promise<MSAssertion>;
+}
+
+declare var MSCredentials: {
+    prototype: MSCredentials;
+    new(): MSCredentials;
+};
+
+interface MSFIDOCredentialAssertion extends MSAssertion {
+    readonly algorithm: string | Algorithm;
+    readonly attestation: any;
+    readonly publicKey: string;
+    readonly transportHints: MSTransportType[];
+}
+
+declare var MSFIDOCredentialAssertion: {
+    prototype: MSFIDOCredentialAssertion;
+    new(): MSFIDOCredentialAssertion;
+};
+
+interface MSFIDOSignature {
+    readonly authnrData: string;
+    readonly clientData: string;
+    readonly signature: string;
+}
+
+declare var MSFIDOSignature: {
+    prototype: MSFIDOSignature;
+    new(): MSFIDOSignature;
+};
+
+interface MSFIDOSignatureAssertion extends MSAssertion {
+    readonly signature: MSFIDOSignature;
+}
+
+declare var MSFIDOSignatureAssertion: {
+    prototype: MSFIDOSignatureAssertion;
+    new(): MSFIDOSignatureAssertion;
+};
+
+interface MSGesture {
+    target: Element;
+    addPointer(pointerId: number): void;
+    stop(): void;
+}
+
+declare var MSGesture: {
+    prototype: MSGesture;
+    new(): MSGesture;
+};
+
+interface MSGestureEvent extends UIEvent {
+    readonly clientX: number;
+    readonly clientY: number;
+    readonly expansion: number;
+    readonly gestureObject: any;
+    readonly hwTimestamp: number;
+    readonly offsetX: number;
+    readonly offsetY: number;
+    readonly rotation: number;
+    readonly scale: number;
+    readonly screenX: number;
+    readonly screenY: number;
+    readonly translationX: number;
+    readonly translationY: number;
+    readonly velocityAngular: number;
+    readonly velocityExpansion: number;
+    readonly velocityX: number;
+    readonly velocityY: number;
+    initGestureEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, offsetXArg: number, offsetYArg: number, translationXArg: number, translationYArg: number, scaleArg: number, expansionArg: number, rotationArg: number, velocityXArg: number, velocityYArg: number, velocityExpansionArg: number, velocityAngularArg: number, hwTimestampArg: number): void;
+    readonly MSGESTURE_FLAG_BEGIN: number;
+    readonly MSGESTURE_FLAG_CANCEL: number;
+    readonly MSGESTURE_FLAG_END: number;
+    readonly MSGESTURE_FLAG_INERTIA: number;
+    readonly MSGESTURE_FLAG_NONE: number;
+}
+
+declare var MSGestureEvent: {
+    prototype: MSGestureEvent;
+    new(): MSGestureEvent;
+    readonly MSGESTURE_FLAG_BEGIN: number;
+    readonly MSGESTURE_FLAG_CANCEL: number;
+    readonly MSGESTURE_FLAG_END: number;
+    readonly MSGESTURE_FLAG_INERTIA: number;
+    readonly MSGESTURE_FLAG_NONE: number;
+};
+
+interface MSGraphicsTrust {
+    readonly constrictionActive: boolean;
+    readonly status: string;
+}
+
+declare var MSGraphicsTrust: {
+    prototype: MSGraphicsTrust;
+    new(): MSGraphicsTrust;
+};
+
+interface MSHTMLWebViewElement extends HTMLElement {
+    readonly canGoBack: boolean;
+    readonly canGoForward: boolean;
+    readonly containsFullScreenElement: boolean;
+    readonly documentTitle: string;
+    height: number;
+    readonly settings: MSWebViewSettings;
+    src: string;
+    width: number;
+    addWebAllowedObject(name: string, applicationObject: any): void;
+    buildLocalStreamUri(contentIdentifier: string, relativePath: string): string;
+    capturePreviewToBlobAsync(): MSWebViewAsyncOperation;
+    captureSelectedContentToDataPackageAsync(): MSWebViewAsyncOperation;
+    getDeferredPermissionRequestById(id: number): DeferredPermissionRequest;
+    getDeferredPermissionRequests(): DeferredPermissionRequest[];
+    goBack(): void;
+    goForward(): void;
+    invokeScriptAsync(scriptName: string, ...args: any[]): MSWebViewAsyncOperation;
+    navigate(uri: string): void;
+    navigateFocus(navigationReason: NavigationReason, origin: FocusNavigationOrigin): void;
+    navigateToLocalStreamUri(source: string, streamResolver: any): void;
+    navigateToString(contents: string): void;
+    navigateWithHttpRequestMessage(requestMessage: any): void;
+    refresh(): void;
+    stop(): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: MSHTMLWebViewElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MSHTMLWebViewElement: {
+    prototype: MSHTMLWebViewElement;
+    new(): MSHTMLWebViewElement;
+};
+
+interface MSInputMethodContextEventMap {
+    "MSCandidateWindowHide": Event;
+    "MSCandidateWindowShow": Event;
+    "MSCandidateWindowUpdate": Event;
+}
+
+interface MSInputMethodContext extends EventTarget {
+    readonly compositionEndOffset: number;
+    readonly compositionStartOffset: number;
+    oncandidatewindowhide: (this: MSInputMethodContext, ev: Event) => any;
+    oncandidatewindowshow: (this: MSInputMethodContext, ev: Event) => any;
+    oncandidatewindowupdate: (this: MSInputMethodContext, ev: Event) => any;
+    readonly target: HTMLElement;
+    getCandidateWindowClientRect(): ClientRect;
+    getCompositionAlternatives(): string[];
+    hasComposition(): boolean;
+    isCandidateWindowVisible(): boolean;
+    addEventListener<K extends keyof MSInputMethodContextEventMap>(type: K, listener: (this: MSInputMethodContext, ev: MSInputMethodContextEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MSInputMethodContext: {
+    prototype: MSInputMethodContext;
+    new(): MSInputMethodContext;
+};
+
+interface MSManipulationEvent extends UIEvent {
+    readonly currentState: number;
+    readonly inertiaDestinationX: number;
+    readonly inertiaDestinationY: number;
+    readonly lastState: number;
+    initMSManipulationEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, lastState: number, currentState: number): void;
+    readonly MS_MANIPULATION_STATE_ACTIVE: number;
+    readonly MS_MANIPULATION_STATE_CANCELLED: number;
+    readonly MS_MANIPULATION_STATE_COMMITTED: number;
+    readonly MS_MANIPULATION_STATE_DRAGGING: number;
+    readonly MS_MANIPULATION_STATE_INERTIA: number;
+    readonly MS_MANIPULATION_STATE_PRESELECT: number;
+    readonly MS_MANIPULATION_STATE_SELECTING: number;
+    readonly MS_MANIPULATION_STATE_STOPPED: number;
+}
+
+declare var MSManipulationEvent: {
+    prototype: MSManipulationEvent;
+    new(): MSManipulationEvent;
+    readonly MS_MANIPULATION_STATE_ACTIVE: number;
+    readonly MS_MANIPULATION_STATE_CANCELLED: number;
+    readonly MS_MANIPULATION_STATE_COMMITTED: number;
+    readonly MS_MANIPULATION_STATE_DRAGGING: number;
+    readonly MS_MANIPULATION_STATE_INERTIA: number;
+    readonly MS_MANIPULATION_STATE_PRESELECT: number;
+    readonly MS_MANIPULATION_STATE_SELECTING: number;
+    readonly MS_MANIPULATION_STATE_STOPPED: number;
+};
+
+interface MSMediaKeyError {
+    readonly code: number;
+    readonly systemCode: number;
+    readonly MS_MEDIA_KEYERR_CLIENT: number;
+    readonly MS_MEDIA_KEYERR_DOMAIN: number;
+    readonly MS_MEDIA_KEYERR_HARDWARECHANGE: number;
+    readonly MS_MEDIA_KEYERR_OUTPUT: number;
+    readonly MS_MEDIA_KEYERR_SERVICE: number;
+    readonly MS_MEDIA_KEYERR_UNKNOWN: number;
+}
+
+declare var MSMediaKeyError: {
+    prototype: MSMediaKeyError;
+    new(): MSMediaKeyError;
+    readonly MS_MEDIA_KEYERR_CLIENT: number;
+    readonly MS_MEDIA_KEYERR_DOMAIN: number;
+    readonly MS_MEDIA_KEYERR_HARDWARECHANGE: number;
+    readonly MS_MEDIA_KEYERR_OUTPUT: number;
+    readonly MS_MEDIA_KEYERR_SERVICE: number;
+    readonly MS_MEDIA_KEYERR_UNKNOWN: number;
+};
+
+interface MSMediaKeyMessageEvent extends Event {
+    readonly destinationURL: string | null;
+    readonly message: Uint8Array;
+}
+
+declare var MSMediaKeyMessageEvent: {
+    prototype: MSMediaKeyMessageEvent;
+    new(): MSMediaKeyMessageEvent;
+};
+
+interface MSMediaKeyNeededEvent extends Event {
+    readonly initData: Uint8Array | null;
+}
+
+declare var MSMediaKeyNeededEvent: {
+    prototype: MSMediaKeyNeededEvent;
+    new(): MSMediaKeyNeededEvent;
+};
+
+interface MSMediaKeys {
+    readonly keySystem: string;
+    createSession(type: string, initData: Uint8Array, cdmData?: Uint8Array): MSMediaKeySession;
+}
+
+declare var MSMediaKeys: {
+    prototype: MSMediaKeys;
+    new(keySystem: string): MSMediaKeys;
+    isTypeSupported(keySystem: string, type?: string): boolean;
+    isTypeSupportedWithFeatures(keySystem: string, type?: string): string;
+};
+
+interface MSMediaKeySession extends EventTarget {
+    readonly error: MSMediaKeyError | null;
+    readonly keySystem: string;
+    readonly sessionId: string;
+    close(): void;
+    update(key: Uint8Array): void;
+}
+
+declare var MSMediaKeySession: {
+    prototype: MSMediaKeySession;
+    new(): MSMediaKeySession;
+};
+
+interface MSPointerEvent extends MouseEvent {
+    readonly currentPoint: any;
+    readonly height: number;
+    readonly hwTimestamp: number;
+    readonly intermediatePoints: any;
+    readonly isPrimary: boolean;
+    readonly pointerId: number;
+    readonly pointerType: any;
+    readonly pressure: number;
+    readonly rotation: number;
+    readonly tiltX: number;
+    readonly tiltY: number;
+    readonly width: number;
+    getCurrentPoint(element: Element): void;
+    getIntermediatePoints(element: Element): void;
+    initPointerEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, ctrlKeyArg: boolean, altKeyArg: boolean, shiftKeyArg: boolean, metaKeyArg: boolean, buttonArg: number, relatedTargetArg: EventTarget, offsetXArg: number, offsetYArg: number, widthArg: number, heightArg: number, pressure: number, rotation: number, tiltX: number, tiltY: number, pointerIdArg: number, pointerType: any, hwTimestampArg: number, isPrimary: boolean): void;
+}
+
+declare var MSPointerEvent: {
+    prototype: MSPointerEvent;
+    new(typeArg: string, eventInitDict?: PointerEventInit): MSPointerEvent;
+};
+
+interface MSRangeCollection {
+    readonly length: number;
+    item(index: number): Range;
+    [index: number]: Range;
+}
+
+declare var MSRangeCollection: {
+    prototype: MSRangeCollection;
+    new(): MSRangeCollection;
+};
+
+interface MSSiteModeEvent extends Event {
+    readonly actionURL: string;
+    readonly buttonID: number;
+}
+
+declare var MSSiteModeEvent: {
+    prototype: MSSiteModeEvent;
+    new(): MSSiteModeEvent;
+};
+
+interface MSStream {
+    readonly type: string;
+    msClose(): void;
+    msDetachStream(): any;
+}
+
+declare var MSStream: {
+    prototype: MSStream;
+    new(): MSStream;
+};
+
+interface MSStreamReader extends EventTarget, MSBaseReader {
+    readonly error: DOMError;
+    readAsArrayBuffer(stream: MSStream, size?: number): void;
+    readAsBinaryString(stream: MSStream, size?: number): void;
+    readAsBlob(stream: MSStream, size?: number): void;
+    readAsDataURL(stream: MSStream, size?: number): void;
+    readAsText(stream: MSStream, encoding?: string, size?: number): void;
+    addEventListener<K extends keyof MSBaseReaderEventMap>(type: K, listener: (this: MSStreamReader, ev: MSBaseReaderEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MSStreamReader: {
+    prototype: MSStreamReader;
+    new(): MSStreamReader;
+};
+
+interface MSWebViewAsyncOperationEventMap {
+    "complete": Event;
+    "error": Event;
+}
+
+interface MSWebViewAsyncOperation extends EventTarget {
+    readonly error: DOMError;
+    oncomplete: (this: MSWebViewAsyncOperation, ev: Event) => any;
+    onerror: (this: MSWebViewAsyncOperation, ev: Event) => any;
+    readonly readyState: number;
+    readonly result: any;
+    readonly target: MSHTMLWebViewElement;
+    readonly type: number;
+    start(): void;
+    readonly COMPLETED: number;
+    readonly ERROR: number;
+    readonly STARTED: number;
+    readonly TYPE_CAPTURE_PREVIEW_TO_RANDOM_ACCESS_STREAM: number;
+    readonly TYPE_CREATE_DATA_PACKAGE_FROM_SELECTION: number;
+    readonly TYPE_INVOKE_SCRIPT: number;
+    addEventListener<K extends keyof MSWebViewAsyncOperationEventMap>(type: K, listener: (this: MSWebViewAsyncOperation, ev: MSWebViewAsyncOperationEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MSWebViewAsyncOperation: {
+    prototype: MSWebViewAsyncOperation;
+    new(): MSWebViewAsyncOperation;
+    readonly COMPLETED: number;
+    readonly ERROR: number;
+    readonly STARTED: number;
+    readonly TYPE_CAPTURE_PREVIEW_TO_RANDOM_ACCESS_STREAM: number;
+    readonly TYPE_CREATE_DATA_PACKAGE_FROM_SELECTION: number;
+    readonly TYPE_INVOKE_SCRIPT: number;
+};
+
+interface MSWebViewSettings {
+    isIndexedDBEnabled: boolean;
+    isJavaScriptEnabled: boolean;
+}
+
+declare var MSWebViewSettings: {
+    prototype: MSWebViewSettings;
+    new(): MSWebViewSettings;
+};
+
+interface MutationEvent extends Event {
+    readonly attrChange: number;
+    readonly attrName: string;
+    readonly newValue: string;
+    readonly prevValue: string;
+    readonly relatedNode: Node;
+    initMutationEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, relatedNodeArg: Node, prevValueArg: string, newValueArg: string, attrNameArg: string, attrChangeArg: number): void;
+    readonly ADDITION: number;
+    readonly MODIFICATION: number;
+    readonly REMOVAL: number;
+}
+
+declare var MutationEvent: {
+    prototype: MutationEvent;
+    new(): MutationEvent;
+    readonly ADDITION: number;
+    readonly MODIFICATION: number;
+    readonly REMOVAL: number;
+};
+
+interface MutationObserver {
+    disconnect(): void;
+    observe(target: Node, options: MutationObserverInit): void;
+    takeRecords(): MutationRecord[];
+}
+
+declare var MutationObserver: {
+    prototype: MutationObserver;
+    new(callback: MutationCallback): MutationObserver;
+};
+
+interface MutationRecord {
+    readonly addedNodes: NodeList;
+    readonly attributeName: string | null;
+    readonly attributeNamespace: string | null;
+    readonly nextSibling: Node | null;
+    readonly oldValue: string | null;
+    readonly previousSibling: Node | null;
+    readonly removedNodes: NodeList;
+    readonly target: Node;
+    readonly type: string;
+}
+
+declare var MutationRecord: {
+    prototype: MutationRecord;
+    new(): MutationRecord;
+};
+
+interface NamedNodeMap {
+    readonly length: number;
+    getNamedItem(name: string): Attr;
+    getNamedItemNS(namespaceURI: string | null, localName: string | null): Attr;
+    item(index: number): Attr;
+    removeNamedItem(name: string): Attr;
+    removeNamedItemNS(namespaceURI: string | null, localName: string | null): Attr;
+    setNamedItem(arg: Attr): Attr;
+    setNamedItemNS(arg: Attr): Attr;
+    [index: number]: Attr;
+}
+
+declare var NamedNodeMap: {
+    prototype: NamedNodeMap;
+    new(): NamedNodeMap;
+};
+
+interface NavigationCompletedEvent extends NavigationEvent {
+    readonly isSuccess: boolean;
+    readonly webErrorStatus: number;
+}
+
+declare var NavigationCompletedEvent: {
+    prototype: NavigationCompletedEvent;
+    new(): NavigationCompletedEvent;
+};
+
+interface NavigationEvent extends Event {
+    readonly uri: string;
+}
+
+declare var NavigationEvent: {
+    prototype: NavigationEvent;
+    new(): NavigationEvent;
+};
+
+interface NavigationEventWithReferrer extends NavigationEvent {
+    readonly referer: string;
+}
+
+declare var NavigationEventWithReferrer: {
+    prototype: NavigationEventWithReferrer;
+    new(): NavigationEventWithReferrer;
+};
+
+interface Navigator extends Object, NavigatorID, NavigatorOnLine, NavigatorContentUtils, NavigatorStorageUtils, NavigatorGeolocation, MSNavigatorDoNotTrack, MSFileSaver, NavigatorBeacon, NavigatorConcurrentHardware, NavigatorUserMedia {
+    readonly authentication: WebAuthentication;
+    readonly cookieEnabled: boolean;
+    gamepadInputEmulation: GamepadInputEmulationType;
+    readonly language: string;
+    readonly maxTouchPoints: number;
+    readonly mimeTypes: MimeTypeArray;
+    readonly msManipulationViewsEnabled: boolean;
+    readonly msMaxTouchPoints: number;
+    readonly msPointerEnabled: boolean;
+    readonly plugins: PluginArray;
+    readonly pointerEnabled: boolean;
+    readonly serviceWorker: ServiceWorkerContainer;
+    readonly webdriver: boolean;
+    readonly hardwareConcurrency: number;
+    readonly languages: string[];
+    getGamepads(): Gamepad[];
+    javaEnabled(): boolean;
+    msLaunchUri(uri: string, successCallback?: MSLaunchUriCallback, noHandlerCallback?: MSLaunchUriCallback): void;
+    requestMediaKeySystemAccess(keySystem: string, supportedConfigurations: MediaKeySystemConfiguration[]): Promise<MediaKeySystemAccess>;
+    vibrate(pattern: number | number[]): boolean;
+}
+
+declare var Navigator: {
+    prototype: Navigator;
+    new(): Navigator;
+};
+
+interface Node extends EventTarget {
+    readonly attributes: NamedNodeMap;
+    readonly baseURI: string | null;
+    readonly childNodes: NodeList;
+    readonly firstChild: Node | null;
+    readonly lastChild: Node | null;
+    readonly localName: string | null;
+    readonly namespaceURI: string | null;
+    readonly nextSibling: Node | null;
+    readonly nodeName: string;
+    readonly nodeType: number;
+    nodeValue: string | null;
+    readonly ownerDocument: Document;
+    readonly parentElement: HTMLElement | null;
+    readonly parentNode: Node | null;
+    readonly previousSibling: Node | null;
+    textContent: string | null;
+    appendChild<T extends Node>(newChild: T): T;
+    cloneNode(deep?: boolean): Node;
+    compareDocumentPosition(other: Node): number;
+    contains(child: Node): boolean;
+    hasAttributes(): boolean;
+    hasChildNodes(): boolean;
+    insertBefore<T extends Node>(newChild: T, refChild: Node | null): T;
+    isDefaultNamespace(namespaceURI: string | null): boolean;
+    isEqualNode(arg: Node): boolean;
+    isSameNode(other: Node): boolean;
+    lookupNamespaceURI(prefix: string | null): string | null;
+    lookupPrefix(namespaceURI: string | null): string | null;
+    normalize(): void;
+    removeChild<T extends Node>(oldChild: T): T;
+    replaceChild<T extends Node>(newChild: Node, oldChild: T): T;
+    readonly ATTRIBUTE_NODE: number;
+    readonly CDATA_SECTION_NODE: number;
+    readonly COMMENT_NODE: number;
+    readonly DOCUMENT_FRAGMENT_NODE: number;
+    readonly DOCUMENT_NODE: number;
+    readonly DOCUMENT_POSITION_CONTAINED_BY: number;
+    readonly DOCUMENT_POSITION_CONTAINS: number;
+    readonly DOCUMENT_POSITION_DISCONNECTED: number;
+    readonly DOCUMENT_POSITION_FOLLOWING: number;
+    readonly DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC: number;
+    readonly DOCUMENT_POSITION_PRECEDING: number;
+    readonly DOCUMENT_TYPE_NODE: number;
+    readonly ELEMENT_NODE: number;
+    readonly ENTITY_NODE: number;
+    readonly ENTITY_REFERENCE_NODE: number;
+    readonly NOTATION_NODE: number;
+    readonly PROCESSING_INSTRUCTION_NODE: number;
+    readonly TEXT_NODE: number;
+}
+
+declare var Node: {
+    prototype: Node;
+    new(): Node;
+    readonly ATTRIBUTE_NODE: number;
+    readonly CDATA_SECTION_NODE: number;
+    readonly COMMENT_NODE: number;
+    readonly DOCUMENT_FRAGMENT_NODE: number;
+    readonly DOCUMENT_NODE: number;
+    readonly DOCUMENT_POSITION_CONTAINED_BY: number;
+    readonly DOCUMENT_POSITION_CONTAINS: number;
+    readonly DOCUMENT_POSITION_DISCONNECTED: number;
+    readonly DOCUMENT_POSITION_FOLLOWING: number;
+    readonly DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC: number;
+    readonly DOCUMENT_POSITION_PRECEDING: number;
+    readonly DOCUMENT_TYPE_NODE: number;
+    readonly ELEMENT_NODE: number;
+    readonly ENTITY_NODE: number;
+    readonly ENTITY_REFERENCE_NODE: number;
+    readonly NOTATION_NODE: number;
+    readonly PROCESSING_INSTRUCTION_NODE: number;
+    readonly TEXT_NODE: number;
+};
+
+interface NodeFilter {
+    acceptNode(n: Node): number;
+}
+
+declare var NodeFilter: {
+    readonly FILTER_ACCEPT: number;
+    readonly FILTER_REJECT: number;
+    readonly FILTER_SKIP: number;
+    readonly SHOW_ALL: number;
+    readonly SHOW_ATTRIBUTE: number;
+    readonly SHOW_CDATA_SECTION: number;
+    readonly SHOW_COMMENT: number;
+    readonly SHOW_DOCUMENT: number;
+    readonly SHOW_DOCUMENT_FRAGMENT: number;
+    readonly SHOW_DOCUMENT_TYPE: number;
+    readonly SHOW_ELEMENT: number;
+    readonly SHOW_ENTITY: number;
+    readonly SHOW_ENTITY_REFERENCE: number;
+    readonly SHOW_NOTATION: number;
+    readonly SHOW_PROCESSING_INSTRUCTION: number;
+    readonly SHOW_TEXT: number;
+};
+
+interface NodeIterator {
+    readonly expandEntityReferences: boolean;
+    readonly filter: NodeFilter;
+    readonly root: Node;
+    readonly whatToShow: number;
+    detach(): void;
+    nextNode(): Node;
+    previousNode(): Node;
+}
+
+declare var NodeIterator: {
+    prototype: NodeIterator;
+    new(): NodeIterator;
+};
+
+interface NodeList {
+    readonly length: number;
+    item(index: number): Node;
+    [index: number]: Node;
+}
+
+declare var NodeList: {
+    prototype: NodeList;
+    new(): NodeList;
+};
+
+interface NotificationEventMap {
+    "click": Event;
+    "close": Event;
+    "error": Event;
+    "show": Event;
+}
+
+interface Notification extends EventTarget {
+    readonly body: string;
+    readonly dir: NotificationDirection;
+    readonly icon: string;
+    readonly lang: string;
+    onclick: (this: Notification, ev: Event) => any;
+    onclose: (this: Notification, ev: Event) => any;
+    onerror: (this: Notification, ev: Event) => any;
+    onshow: (this: Notification, ev: Event) => any;
+    readonly permission: NotificationPermission;
+    readonly tag: string;
+    readonly title: string;
+    close(): void;
+    addEventListener<K extends keyof NotificationEventMap>(type: K, listener: (this: Notification, ev: NotificationEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var Notification: {
+    prototype: Notification;
+    new(title: string, options?: NotificationOptions): Notification;
+    requestPermission(callback?: NotificationPermissionCallback): Promise<NotificationPermission>;
+};
+
+interface OES_element_index_uint {
+}
+
+declare var OES_element_index_uint: {
+    prototype: OES_element_index_uint;
+    new(): OES_element_index_uint;
+};
+
+interface OES_standard_derivatives {
+    readonly FRAGMENT_SHADER_DERIVATIVE_HINT_OES: number;
+}
+
+declare var OES_standard_derivatives: {
+    prototype: OES_standard_derivatives;
+    new(): OES_standard_derivatives;
+    readonly FRAGMENT_SHADER_DERIVATIVE_HINT_OES: number;
+};
+
+interface OES_texture_float {
+}
+
+declare var OES_texture_float: {
+    prototype: OES_texture_float;
+    new(): OES_texture_float;
+};
+
+interface OES_texture_float_linear {
+}
+
+declare var OES_texture_float_linear: {
+    prototype: OES_texture_float_linear;
+    new(): OES_texture_float_linear;
+};
+
+interface OES_texture_half_float {
+    readonly HALF_FLOAT_OES: number;
+}
+
+declare var OES_texture_half_float: {
+    prototype: OES_texture_half_float;
+    new(): OES_texture_half_float;
+    readonly HALF_FLOAT_OES: number;
+};
+
+interface OES_texture_half_float_linear {
+}
+
+declare var OES_texture_half_float_linear: {
+    prototype: OES_texture_half_float_linear;
+    new(): OES_texture_half_float_linear;
+};
+
+interface OfflineAudioCompletionEvent extends Event {
+    readonly renderedBuffer: AudioBuffer;
+}
+
+declare var OfflineAudioCompletionEvent: {
+    prototype: OfflineAudioCompletionEvent;
+    new(): OfflineAudioCompletionEvent;
+};
+
+interface OfflineAudioContextEventMap extends AudioContextEventMap {
+    "complete": OfflineAudioCompletionEvent;
+}
+
+interface OfflineAudioContext extends AudioContextBase {
+    readonly length: number;
+    oncomplete: (this: OfflineAudioContext, ev: OfflineAudioCompletionEvent) => any;
+    startRendering(): Promise<AudioBuffer>;
+    suspend(suspendTime: number): Promise<void>;
+    addEventListener<K extends keyof OfflineAudioContextEventMap>(type: K, listener: (this: OfflineAudioContext, ev: OfflineAudioContextEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var OfflineAudioContext: {
+    prototype: OfflineAudioContext;
+    new(numberOfChannels: number, length: number, sampleRate: number): OfflineAudioContext;
+};
+
+interface OscillatorNodeEventMap {
+    "ended": MediaStreamErrorEvent;
+}
+
+interface OscillatorNode extends AudioNode {
+    readonly detune: AudioParam;
+    readonly frequency: AudioParam;
+    onended: (this: OscillatorNode, ev: MediaStreamErrorEvent) => any;
+    type: OscillatorType;
+    setPeriodicWave(periodicWave: PeriodicWave): void;
+    start(when?: number): void;
+    stop(when?: number): void;
+    addEventListener<K extends keyof OscillatorNodeEventMap>(type: K, listener: (this: OscillatorNode, ev: OscillatorNodeEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var OscillatorNode: {
+    prototype: OscillatorNode;
+    new(): OscillatorNode;
+};
+
+interface OverflowEvent extends UIEvent {
+    readonly horizontalOverflow: boolean;
+    readonly orient: number;
+    readonly verticalOverflow: boolean;
+    readonly BOTH: number;
+    readonly HORIZONTAL: number;
+    readonly VERTICAL: number;
+}
+
+declare var OverflowEvent: {
+    prototype: OverflowEvent;
+    new(): OverflowEvent;
+    readonly BOTH: number;
+    readonly HORIZONTAL: number;
+    readonly VERTICAL: number;
+};
+
+interface PageTransitionEvent extends Event {
+    readonly persisted: boolean;
+}
+
+declare var PageTransitionEvent: {
+    prototype: PageTransitionEvent;
+    new(): PageTransitionEvent;
+};
+
+interface PannerNode extends AudioNode {
+    coneInnerAngle: number;
+    coneOuterAngle: number;
+    coneOuterGain: number;
+    distanceModel: DistanceModelType;
+    maxDistance: number;
+    panningModel: PanningModelType;
+    refDistance: number;
+    rolloffFactor: number;
+    setOrientation(x: number, y: number, z: number): void;
+    setPosition(x: number, y: number, z: number): void;
+    setVelocity(x: number, y: number, z: number): void;
+}
+
+declare var PannerNode: {
+    prototype: PannerNode;
+    new(): PannerNode;
+};
+
+interface Path2D extends Object, CanvasPathMethods {
+}
+
+declare var Path2D: {
+    prototype: Path2D;
+    new(path?: Path2D): Path2D;
+};
+
+interface PaymentAddress {
+    readonly addressLine: string[];
+    readonly city: string;
+    readonly country: string;
+    readonly dependentLocality: string;
+    readonly languageCode: string;
+    readonly organization: string;
+    readonly phone: string;
+    readonly postalCode: string;
+    readonly recipient: string;
+    readonly region: string;
+    readonly sortingCode: string;
+    toJSON(): any;
+}
+
+declare var PaymentAddress: {
+    prototype: PaymentAddress;
+    new(): PaymentAddress;
+};
+
+interface PaymentRequestEventMap {
+    "shippingaddresschange": Event;
+    "shippingoptionchange": Event;
+}
+
+interface PaymentRequest extends EventTarget {
+    onshippingaddresschange: (this: PaymentRequest, ev: Event) => any;
+    onshippingoptionchange: (this: PaymentRequest, ev: Event) => any;
+    readonly shippingAddress: PaymentAddress | null;
+    readonly shippingOption: string | null;
+    readonly shippingType: PaymentShippingType | null;
+    abort(): Promise<void>;
+    show(): Promise<PaymentResponse>;
+    addEventListener<K extends keyof PaymentRequestEventMap>(type: K, listener: (this: PaymentRequest, ev: PaymentRequestEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var PaymentRequest: {
+    prototype: PaymentRequest;
+    new(methodData: PaymentMethodData[], details: PaymentDetails, options?: PaymentOptions): PaymentRequest;
+};
+
+interface PaymentRequestUpdateEvent extends Event {
+    updateWith(d: Promise<PaymentDetails>): void;
+}
+
+declare var PaymentRequestUpdateEvent: {
+    prototype: PaymentRequestUpdateEvent;
+    new(type: string, eventInitDict?: PaymentRequestUpdateEventInit): PaymentRequestUpdateEvent;
+};
+
+interface PaymentResponse {
+    readonly details: any;
+    readonly methodName: string;
+    readonly payerEmail: string | null;
+    readonly payerName: string | null;
+    readonly payerPhone: string | null;
+    readonly shippingAddress: PaymentAddress | null;
+    readonly shippingOption: string | null;
+    complete(result?: PaymentComplete): Promise<void>;
+    toJSON(): any;
+}
+
+declare var PaymentResponse: {
+    prototype: PaymentResponse;
+    new(): PaymentResponse;
+};
+
+interface Performance {
+    readonly navigation: PerformanceNavigation;
+    readonly timing: PerformanceTiming;
+    clearMarks(markName?: string): void;
+    clearMeasures(measureName?: string): void;
+    clearResourceTimings(): void;
+    getEntries(): any;
+    getEntriesByName(name: string, entryType?: string): any;
+    getEntriesByType(entryType: string): any;
+    getMarks(markName?: string): any;
+    getMeasures(measureName?: string): any;
+    mark(markName: string): void;
+    measure(measureName: string, startMarkName?: string, endMarkName?: string): void;
+    now(): number;
+    setResourceTimingBufferSize(maxSize: number): void;
+    toJSON(): any;
+}
+
+declare var Performance: {
+    prototype: Performance;
+    new(): Performance;
+};
+
+interface PerformanceEntry {
+    readonly duration: number;
+    readonly entryType: string;
+    readonly name: string;
+    readonly startTime: number;
+}
+
+declare var PerformanceEntry: {
+    prototype: PerformanceEntry;
+    new(): PerformanceEntry;
+};
+
+interface PerformanceMark extends PerformanceEntry {
+}
+
+declare var PerformanceMark: {
+    prototype: PerformanceMark;
+    new(): PerformanceMark;
+};
+
+interface PerformanceMeasure extends PerformanceEntry {
+}
+
+declare var PerformanceMeasure: {
+    prototype: PerformanceMeasure;
+    new(): PerformanceMeasure;
+};
+
+interface PerformanceNavigation {
+    readonly redirectCount: number;
+    readonly type: number;
+    toJSON(): any;
+    readonly TYPE_BACK_FORWARD: number;
+    readonly TYPE_NAVIGATE: number;
+    readonly TYPE_RELOAD: number;
+    readonly TYPE_RESERVED: number;
+}
+
+declare var PerformanceNavigation: {
+    prototype: PerformanceNavigation;
+    new(): PerformanceNavigation;
+    readonly TYPE_BACK_FORWARD: number;
+    readonly TYPE_NAVIGATE: number;
+    readonly TYPE_RELOAD: number;
+    readonly TYPE_RESERVED: number;
+};
+
+interface PerformanceNavigationTiming extends PerformanceEntry {
+    readonly connectEnd: number;
+    readonly connectStart: number;
+    readonly domainLookupEnd: number;
+    readonly domainLookupStart: number;
+    readonly domComplete: number;
+    readonly domContentLoadedEventEnd: number;
+    readonly domContentLoadedEventStart: number;
+    readonly domInteractive: number;
+    readonly domLoading: number;
+    readonly fetchStart: number;
+    readonly loadEventEnd: number;
+    readonly loadEventStart: number;
+    readonly navigationStart: number;
+    readonly redirectCount: number;
+    readonly redirectEnd: number;
+    readonly redirectStart: number;
+    readonly requestStart: number;
+    readonly responseEnd: number;
+    readonly responseStart: number;
+    readonly type: NavigationType;
+    readonly unloadEventEnd: number;
+    readonly unloadEventStart: number;
+}
+
+declare var PerformanceNavigationTiming: {
+    prototype: PerformanceNavigationTiming;
+    new(): PerformanceNavigationTiming;
+};
+
+interface PerformanceResourceTiming extends PerformanceEntry {
+    readonly connectEnd: number;
+    readonly connectStart: number;
+    readonly domainLookupEnd: number;
+    readonly domainLookupStart: number;
+    readonly fetchStart: number;
+    readonly initiatorType: string;
+    readonly redirectEnd: number;
+    readonly redirectStart: number;
+    readonly requestStart: number;
+    readonly responseEnd: number;
+    readonly responseStart: number;
+}
+
+declare var PerformanceResourceTiming: {
+    prototype: PerformanceResourceTiming;
+    new(): PerformanceResourceTiming;
+};
+
+interface PerformanceTiming {
+    readonly connectEnd: number;
+    readonly connectStart: number;
+    readonly domainLookupEnd: number;
+    readonly domainLookupStart: number;
+    readonly domComplete: number;
+    readonly domContentLoadedEventEnd: number;
+    readonly domContentLoadedEventStart: number;
+    readonly domInteractive: number;
+    readonly domLoading: number;
+    readonly fetchStart: number;
+    readonly loadEventEnd: number;
+    readonly loadEventStart: number;
+    readonly msFirstPaint: number;
+    readonly navigationStart: number;
+    readonly redirectEnd: number;
+    readonly redirectStart: number;
+    readonly requestStart: number;
+    readonly responseEnd: number;
+    readonly responseStart: number;
+    readonly unloadEventEnd: number;
+    readonly unloadEventStart: number;
+    readonly secureConnectionStart: number;
+    toJSON(): any;
+}
+
+declare var PerformanceTiming: {
+    prototype: PerformanceTiming;
+    new(): PerformanceTiming;
+};
+
+interface PerfWidgetExternal {
+    readonly activeNetworkRequestCount: number;
+    readonly averageFrameTime: number;
+    readonly averagePaintTime: number;
+    readonly extraInformationEnabled: boolean;
+    readonly independentRenderingEnabled: boolean;
+    readonly irDisablingContentString: string;
+    readonly irStatusAvailable: boolean;
+    readonly maxCpuSpeed: number;
+    readonly paintRequestsPerSecond: number;
+    readonly performanceCounter: number;
+    readonly performanceCounterFrequency: number;
+    addEventListener(eventType: string, callback: Function): void;
+    getMemoryUsage(): number;
+    getProcessCpuUsage(): number;
+    getRecentCpuUsage(last: number | null): any;
+    getRecentFrames(last: number | null): any;
+    getRecentMemoryUsage(last: number | null): any;
+    getRecentPaintRequests(last: number | null): any;
+    removeEventListener(eventType: string, callback: Function): void;
+    repositionWindow(x: number, y: number): void;
+    resizeWindow(width: number, height: number): void;
+}
+
+declare var PerfWidgetExternal: {
+    prototype: PerfWidgetExternal;
+    new(): PerfWidgetExternal;
+};
+
+interface PeriodicWave {
+}
+
+declare var PeriodicWave: {
+    prototype: PeriodicWave;
+    new(): PeriodicWave;
+};
+
+interface PermissionRequest extends DeferredPermissionRequest {
+    readonly state: MSWebViewPermissionState;
+    defer(): void;
+}
+
+declare var PermissionRequest: {
+    prototype: PermissionRequest;
+    new(): PermissionRequest;
+};
+
+interface PermissionRequestedEvent extends Event {
+    readonly permissionRequest: PermissionRequest;
+}
+
+declare var PermissionRequestedEvent: {
+    prototype: PermissionRequestedEvent;
+    new(): PermissionRequestedEvent;
+};
+
+interface Plugin {
+    readonly description: string;
+    readonly filename: string;
+    readonly length: number;
+    readonly name: string;
+    readonly version: string;
+    item(index: number): MimeType;
+    namedItem(type: string): MimeType;
+    [index: number]: MimeType;
+}
+
+declare var Plugin: {
+    prototype: Plugin;
+    new(): Plugin;
+};
+
+interface PluginArray {
+    readonly length: number;
+    item(index: number): Plugin;
+    namedItem(name: string): Plugin;
+    refresh(reload?: boolean): void;
+    [index: number]: Plugin;
+}
+
+declare var PluginArray: {
+    prototype: PluginArray;
+    new(): PluginArray;
+};
+
+interface PointerEvent extends MouseEvent {
+    readonly currentPoint: any;
+    readonly height: number;
+    readonly hwTimestamp: number;
+    readonly intermediatePoints: any;
+    readonly isPrimary: boolean;
+    readonly pointerId: number;
+    readonly pointerType: any;
+    readonly pressure: number;
+    readonly rotation: number;
+    readonly tiltX: number;
+    readonly tiltY: number;
+    readonly width: number;
+    getCurrentPoint(element: Element): void;
+    getIntermediatePoints(element: Element): void;
+    initPointerEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, ctrlKeyArg: boolean, altKeyArg: boolean, shiftKeyArg: boolean, metaKeyArg: boolean, buttonArg: number, relatedTargetArg: EventTarget, offsetXArg: number, offsetYArg: number, widthArg: number, heightArg: number, pressure: number, rotation: number, tiltX: number, tiltY: number, pointerIdArg: number, pointerType: any, hwTimestampArg: number, isPrimary: boolean): void;
+}
+
+declare var PointerEvent: {
+    prototype: PointerEvent;
+    new(typeArg: string, eventInitDict?: PointerEventInit): PointerEvent;
+};
+
+interface PopStateEvent extends Event {
+    readonly state: any;
+    initPopStateEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, stateArg: any): void;
+}
+
+declare var PopStateEvent: {
+    prototype: PopStateEvent;
+    new(typeArg: string, eventInitDict?: PopStateEventInit): PopStateEvent;
+};
+
+interface Position {
+    readonly coords: Coordinates;
+    readonly timestamp: number;
+}
+
+declare var Position: {
+    prototype: Position;
+    new(): Position;
+};
+
+interface PositionError {
+    readonly code: number;
+    readonly message: string;
+    toString(): string;
+    readonly PERMISSION_DENIED: number;
+    readonly POSITION_UNAVAILABLE: number;
+    readonly TIMEOUT: number;
+}
+
+declare var PositionError: {
+    prototype: PositionError;
+    new(): PositionError;
+    readonly PERMISSION_DENIED: number;
+    readonly POSITION_UNAVAILABLE: number;
+    readonly TIMEOUT: number;
+};
+
+interface ProcessingInstruction extends CharacterData {
+    readonly target: string;
+}
+
+declare var ProcessingInstruction: {
+    prototype: ProcessingInstruction;
+    new(): ProcessingInstruction;
+};
+
+interface ProgressEvent extends Event {
+    readonly lengthComputable: boolean;
+    readonly loaded: number;
+    readonly total: number;
+    initProgressEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, lengthComputableArg: boolean, loadedArg: number, totalArg: number): void;
+}
+
+declare var ProgressEvent: {
+    prototype: ProgressEvent;
+    new(type: string, eventInitDict?: ProgressEventInit): ProgressEvent;
+};
+
+interface PushManager {
+    getSubscription(): Promise<PushSubscription>;
+    permissionState(options?: PushSubscriptionOptionsInit): Promise<PushPermissionState>;
+    subscribe(options?: PushSubscriptionOptionsInit): Promise<PushSubscription>;
+}
+
+declare var PushManager: {
+    prototype: PushManager;
+    new(): PushManager;
+};
+
+interface PushSubscription {
+    readonly endpoint: USVString;
+    readonly options: PushSubscriptionOptions;
+    getKey(name: PushEncryptionKeyName): ArrayBuffer | null;
+    toJSON(): any;
+    unsubscribe(): Promise<boolean>;
+}
+
+declare var PushSubscription: {
+    prototype: PushSubscription;
+    new(): PushSubscription;
+};
+
+interface PushSubscriptionOptions {
+    readonly applicationServerKey: ArrayBuffer | null;
+    readonly userVisibleOnly: boolean;
+}
+
+declare var PushSubscriptionOptions: {
+    prototype: PushSubscriptionOptions;
+    new(): PushSubscriptionOptions;
+};
+
+interface Range {
+    readonly collapsed: boolean;
+    readonly commonAncestorContainer: Node;
+    readonly endContainer: Node;
+    readonly endOffset: number;
+    readonly startContainer: Node;
+    readonly startOffset: number;
+    cloneContents(): DocumentFragment;
+    cloneRange(): Range;
+    collapse(toStart: boolean): void;
+    compareBoundaryPoints(how: number, sourceRange: Range): number;
+    createContextualFragment(fragment: string): DocumentFragment;
+    deleteContents(): void;
+    detach(): void;
+    expand(Unit: ExpandGranularity): boolean;
+    extractContents(): DocumentFragment;
+    getBoundingClientRect(): ClientRect;
+    getClientRects(): ClientRectList;
+    insertNode(newNode: Node): void;
+    selectNode(refNode: Node): void;
+    selectNodeContents(refNode: Node): void;
+    setEnd(refNode: Node, offset: number): void;
+    setEndAfter(refNode: Node): void;
+    setEndBefore(refNode: Node): void;
+    setStart(refNode: Node, offset: number): void;
+    setStartAfter(refNode: Node): void;
+    setStartBefore(refNode: Node): void;
+    surroundContents(newParent: Node): void;
+    toString(): string;
+    readonly END_TO_END: number;
+    readonly END_TO_START: number;
+    readonly START_TO_END: number;
+    readonly START_TO_START: number;
+}
+
+declare var Range: {
+    prototype: Range;
+    new(): Range;
+    readonly END_TO_END: number;
+    readonly END_TO_START: number;
+    readonly START_TO_END: number;
+    readonly START_TO_START: number;
+};
+
+interface ReadableStream {
+    readonly locked: boolean;
+    cancel(): Promise<void>;
+    getReader(): ReadableStreamReader;
+}
+
+declare var ReadableStream: {
+    prototype: ReadableStream;
+    new(): ReadableStream;
+};
+
+interface ReadableStreamReader {
+    cancel(): Promise<void>;
+    read(): Promise<any>;
+    releaseLock(): void;
+}
+
+declare var ReadableStreamReader: {
+    prototype: ReadableStreamReader;
+    new(): ReadableStreamReader;
+};
+
+interface Request extends Object, Body {
+    readonly cache: RequestCache;
+    readonly credentials: RequestCredentials;
+    readonly destination: RequestDestination;
+    readonly headers: Headers;
+    readonly integrity: string;
+    readonly keepalive: boolean;
+    readonly method: string;
+    readonly mode: RequestMode;
+    readonly redirect: RequestRedirect;
+    readonly referrer: string;
+    readonly referrerPolicy: ReferrerPolicy;
+    readonly type: RequestType;
+    readonly url: string;
+    clone(): Request;
+}
+
+declare var Request: {
+    prototype: Request;
+    new(input: Request | string, init?: RequestInit): Request;
+};
+
+interface Response extends Object, Body {
+    readonly body: ReadableStream | null;
+    readonly headers: Headers;
+    readonly ok: boolean;
+    readonly status: number;
+    readonly statusText: string;
+    readonly type: ResponseType;
+    readonly url: string;
+    clone(): Response;
+}
+
+declare var Response: {
+    prototype: Response;
+    new(body?: any, init?: ResponseInit): Response;
+    error: () => Response;
+    redirect: (url: string, status?: number) => Response;
+};
+
+interface RTCDtlsTransportEventMap {
+    "dtlsstatechange": RTCDtlsTransportStateChangedEvent;
+    "error": Event;
+}
+
+interface RTCDtlsTransport extends RTCStatsProvider {
+    ondtlsstatechange: ((this: RTCDtlsTransport, ev: RTCDtlsTransportStateChangedEvent) => any) | null;
+    onerror: ((this: RTCDtlsTransport, ev: Event) => any) | null;
+    readonly state: RTCDtlsTransportState;
+    readonly transport: RTCIceTransport;
+    getLocalParameters(): RTCDtlsParameters;
+    getRemoteCertificates(): ArrayBuffer[];
+    getRemoteParameters(): RTCDtlsParameters | null;
+    start(remoteParameters: RTCDtlsParameters): void;
+    stop(): void;
+    addEventListener<K extends keyof RTCDtlsTransportEventMap>(type: K, listener: (this: RTCDtlsTransport, ev: RTCDtlsTransportEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var RTCDtlsTransport: {
+    prototype: RTCDtlsTransport;
+    new(transport: RTCIceTransport): RTCDtlsTransport;
+};
+
+interface RTCDtlsTransportStateChangedEvent extends Event {
+    readonly state: RTCDtlsTransportState;
+}
+
+declare var RTCDtlsTransportStateChangedEvent: {
+    prototype: RTCDtlsTransportStateChangedEvent;
+    new(): RTCDtlsTransportStateChangedEvent;
+};
+
+interface RTCDtmfSenderEventMap {
+    "tonechange": RTCDTMFToneChangeEvent;
+}
+
+interface RTCDtmfSender extends EventTarget {
+    readonly canInsertDTMF: boolean;
+    readonly duration: number;
+    readonly interToneGap: number;
+    ontonechange: (this: RTCDtmfSender, ev: RTCDTMFToneChangeEvent) => any;
+    readonly sender: RTCRtpSender;
+    readonly toneBuffer: string;
+    insertDTMF(tones: string, duration?: number, interToneGap?: number): void;
+    addEventListener<K extends keyof RTCDtmfSenderEventMap>(type: K, listener: (this: RTCDtmfSender, ev: RTCDtmfSenderEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var RTCDtmfSender: {
+    prototype: RTCDtmfSender;
+    new(sender: RTCRtpSender): RTCDtmfSender;
+};
+
+interface RTCDTMFToneChangeEvent extends Event {
+    readonly tone: string;
+}
+
+declare var RTCDTMFToneChangeEvent: {
+    prototype: RTCDTMFToneChangeEvent;
+    new(typeArg: string, eventInitDict: RTCDTMFToneChangeEventInit): RTCDTMFToneChangeEvent;
+};
+
+interface RTCIceCandidate {
+    candidate: string | null;
+    sdpMid: string | null;
+    sdpMLineIndex: number | null;
+    toJSON(): any;
+}
+
+declare var RTCIceCandidate: {
+    prototype: RTCIceCandidate;
+    new(candidateInitDict?: RTCIceCandidateInit): RTCIceCandidate;
+};
+
+interface RTCIceCandidatePairChangedEvent extends Event {
+    readonly pair: RTCIceCandidatePair;
+}
+
+declare var RTCIceCandidatePairChangedEvent: {
+    prototype: RTCIceCandidatePairChangedEvent;
+    new(): RTCIceCandidatePairChangedEvent;
+};
+
+interface RTCIceGathererEventMap {
+    "error": Event;
+    "localcandidate": RTCIceGathererEvent;
+}
+
+interface RTCIceGatherer extends RTCStatsProvider {
+    readonly component: RTCIceComponent;
+    onerror: ((this: RTCIceGatherer, ev: Event) => any) | null;
+    onlocalcandidate: ((this: RTCIceGatherer, ev: RTCIceGathererEvent) => any) | null;
+    createAssociatedGatherer(): RTCIceGatherer;
+    getLocalCandidates(): RTCIceCandidateDictionary[];
+    getLocalParameters(): RTCIceParameters;
+    addEventListener<K extends keyof RTCIceGathererEventMap>(type: K, listener: (this: RTCIceGatherer, ev: RTCIceGathererEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var RTCIceGatherer: {
+    prototype: RTCIceGatherer;
+    new(options: RTCIceGatherOptions): RTCIceGatherer;
+};
+
+interface RTCIceGathererEvent extends Event {
+    readonly candidate: RTCIceCandidateDictionary | RTCIceCandidateComplete;
+}
+
+declare var RTCIceGathererEvent: {
+    prototype: RTCIceGathererEvent;
+    new(): RTCIceGathererEvent;
+};
+
+interface RTCIceTransportEventMap {
+    "candidatepairchange": RTCIceCandidatePairChangedEvent;
+    "icestatechange": RTCIceTransportStateChangedEvent;
+}
+
+interface RTCIceTransport extends RTCStatsProvider {
+    readonly component: RTCIceComponent;
+    readonly iceGatherer: RTCIceGatherer | null;
+    oncandidatepairchange: ((this: RTCIceTransport, ev: RTCIceCandidatePairChangedEvent) => any) | null;
+    onicestatechange: ((this: RTCIceTransport, ev: RTCIceTransportStateChangedEvent) => any) | null;
+    readonly role: RTCIceRole;
+    readonly state: RTCIceTransportState;
+    addRemoteCandidate(remoteCandidate: RTCIceCandidateDictionary | RTCIceCandidateComplete): void;
+    createAssociatedTransport(): RTCIceTransport;
+    getNominatedCandidatePair(): RTCIceCandidatePair | null;
+    getRemoteCandidates(): RTCIceCandidateDictionary[];
+    getRemoteParameters(): RTCIceParameters | null;
+    setRemoteCandidates(remoteCandidates: RTCIceCandidateDictionary[]): void;
+    start(gatherer: RTCIceGatherer, remoteParameters: RTCIceParameters, role?: RTCIceRole): void;
+    stop(): void;
+    addEventListener<K extends keyof RTCIceTransportEventMap>(type: K, listener: (this: RTCIceTransport, ev: RTCIceTransportEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var RTCIceTransport: {
+    prototype: RTCIceTransport;
+    new(): RTCIceTransport;
+};
+
+interface RTCIceTransportStateChangedEvent extends Event {
+    readonly state: RTCIceTransportState;
+}
+
+declare var RTCIceTransportStateChangedEvent: {
+    prototype: RTCIceTransportStateChangedEvent;
+    new(): RTCIceTransportStateChangedEvent;
+};
+
+interface RTCPeerConnectionEventMap {
+    "addstream": MediaStreamEvent;
+    "icecandidate": RTCPeerConnectionIceEvent;
+    "iceconnectionstatechange": Event;
+    "icegatheringstatechange": Event;
+    "negotiationneeded": Event;
+    "removestream": MediaStreamEvent;
+    "signalingstatechange": Event;
+}
+
+interface RTCPeerConnection extends EventTarget {
+    readonly canTrickleIceCandidates: boolean | null;
+    readonly iceConnectionState: RTCIceConnectionState;
+    readonly iceGatheringState: RTCIceGatheringState;
+    readonly localDescription: RTCSessionDescription | null;
+    onaddstream: (this: RTCPeerConnection, ev: MediaStreamEvent) => any;
+    onicecandidate: (this: RTCPeerConnection, ev: RTCPeerConnectionIceEvent) => any;
+    oniceconnectionstatechange: (this: RTCPeerConnection, ev: Event) => any;
+    onicegatheringstatechange: (this: RTCPeerConnection, ev: Event) => any;
+    onnegotiationneeded: (this: RTCPeerConnection, ev: Event) => any;
+    onremovestream: (this: RTCPeerConnection, ev: MediaStreamEvent) => any;
+    onsignalingstatechange: (this: RTCPeerConnection, ev: Event) => any;
+    readonly remoteDescription: RTCSessionDescription | null;
+    readonly signalingState: RTCSignalingState;
+    addIceCandidate(candidate: RTCIceCandidate, successCallback?: VoidFunction, failureCallback?: RTCPeerConnectionErrorCallback): Promise<void>;
+    addStream(stream: MediaStream): void;
+    close(): void;
+    createAnswer(successCallback?: RTCSessionDescriptionCallback, failureCallback?: RTCPeerConnectionErrorCallback): Promise<RTCSessionDescription>;
+    createOffer(successCallback?: RTCSessionDescriptionCallback, failureCallback?: RTCPeerConnectionErrorCallback, options?: RTCOfferOptions): Promise<RTCSessionDescription>;
+    getConfiguration(): RTCConfiguration;
+    getLocalStreams(): MediaStream[];
+    getRemoteStreams(): MediaStream[];
+    getStats(selector: MediaStreamTrack | null, successCallback?: RTCStatsCallback, failureCallback?: RTCPeerConnectionErrorCallback): Promise<RTCStatsReport>;
+    getStreamById(streamId: string): MediaStream | null;
+    removeStream(stream: MediaStream): void;
+    setLocalDescription(description: RTCSessionDescription, successCallback?: VoidFunction, failureCallback?: RTCPeerConnectionErrorCallback): Promise<void>;
+    setRemoteDescription(description: RTCSessionDescription, successCallback?: VoidFunction, failureCallback?: RTCPeerConnectionErrorCallback): Promise<void>;
+    addEventListener<K extends keyof RTCPeerConnectionEventMap>(type: K, listener: (this: RTCPeerConnection, ev: RTCPeerConnectionEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var RTCPeerConnection: {
+    prototype: RTCPeerConnection;
+    new(configuration: RTCConfiguration): RTCPeerConnection;
+};
+
+interface RTCPeerConnectionIceEvent extends Event {
+    readonly candidate: RTCIceCandidate;
+}
+
+declare var RTCPeerConnectionIceEvent: {
+    prototype: RTCPeerConnectionIceEvent;
+    new(type: string, eventInitDict: RTCPeerConnectionIceEventInit): RTCPeerConnectionIceEvent;
+};
+
+interface RTCRtpReceiverEventMap {
+    "error": Event;
+}
+
+interface RTCRtpReceiver extends RTCStatsProvider {
+    onerror: ((this: RTCRtpReceiver, ev: Event) => any) | null;
+    readonly rtcpTransport: RTCDtlsTransport;
+    readonly track: MediaStreamTrack | null;
+    readonly transport: RTCDtlsTransport | RTCSrtpSdesTransport;
+    getContributingSources(): RTCRtpContributingSource[];
+    receive(parameters: RTCRtpParameters): void;
+    requestSendCSRC(csrc: number): void;
+    setTransport(transport: RTCDtlsTransport | RTCSrtpSdesTransport, rtcpTransport?: RTCDtlsTransport): void;
+    stop(): void;
+    addEventListener<K extends keyof RTCRtpReceiverEventMap>(type: K, listener: (this: RTCRtpReceiver, ev: RTCRtpReceiverEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var RTCRtpReceiver: {
+    prototype: RTCRtpReceiver;
+    new(transport: RTCDtlsTransport | RTCSrtpSdesTransport, kind: string, rtcpTransport?: RTCDtlsTransport): RTCRtpReceiver;
+    getCapabilities(kind?: string): RTCRtpCapabilities;
+};
+
+interface RTCRtpSenderEventMap {
+    "error": Event;
+    "ssrcconflict": RTCSsrcConflictEvent;
+}
+
+interface RTCRtpSender extends RTCStatsProvider {
+    onerror: ((this: RTCRtpSender, ev: Event) => any) | null;
+    onssrcconflict: ((this: RTCRtpSender, ev: RTCSsrcConflictEvent) => any) | null;
+    readonly rtcpTransport: RTCDtlsTransport;
+    readonly track: MediaStreamTrack;
+    readonly transport: RTCDtlsTransport | RTCSrtpSdesTransport;
+    send(parameters: RTCRtpParameters): void;
+    setTrack(track: MediaStreamTrack): void;
+    setTransport(transport: RTCDtlsTransport | RTCSrtpSdesTransport, rtcpTransport?: RTCDtlsTransport): void;
+    stop(): void;
+    addEventListener<K extends keyof RTCRtpSenderEventMap>(type: K, listener: (this: RTCRtpSender, ev: RTCRtpSenderEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var RTCRtpSender: {
+    prototype: RTCRtpSender;
+    new(track: MediaStreamTrack, transport: RTCDtlsTransport | RTCSrtpSdesTransport, rtcpTransport?: RTCDtlsTransport): RTCRtpSender;
+    getCapabilities(kind?: string): RTCRtpCapabilities;
+};
+
+interface RTCSessionDescription {
+    sdp: string | null;
+    type: RTCSdpType | null;
+    toJSON(): any;
+}
+
+declare var RTCSessionDescription: {
+    prototype: RTCSessionDescription;
+    new(descriptionInitDict?: RTCSessionDescriptionInit): RTCSessionDescription;
+};
+
+interface RTCSrtpSdesTransportEventMap {
+    "error": Event;
+}
+
+interface RTCSrtpSdesTransport extends EventTarget {
+    onerror: ((this: RTCSrtpSdesTransport, ev: Event) => any) | null;
+    readonly transport: RTCIceTransport;
+    addEventListener<K extends keyof RTCSrtpSdesTransportEventMap>(type: K, listener: (this: RTCSrtpSdesTransport, ev: RTCSrtpSdesTransportEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var RTCSrtpSdesTransport: {
+    prototype: RTCSrtpSdesTransport;
+    new(transport: RTCIceTransport, encryptParameters: RTCSrtpSdesParameters, decryptParameters: RTCSrtpSdesParameters): RTCSrtpSdesTransport;
+    getLocalParameters(): RTCSrtpSdesParameters[];
+};
+
+interface RTCSsrcConflictEvent extends Event {
+    readonly ssrc: number;
+}
+
+declare var RTCSsrcConflictEvent: {
+    prototype: RTCSsrcConflictEvent;
+    new(): RTCSsrcConflictEvent;
+};
+
+interface RTCStatsProvider extends EventTarget {
+    getStats(): Promise<RTCStatsReport>;
+    msGetStats(): Promise<RTCStatsReport>;
+}
+
+declare var RTCStatsProvider: {
+    prototype: RTCStatsProvider;
+    new(): RTCStatsProvider;
+};
+
+interface ScopedCredential {
+    readonly id: ArrayBuffer;
+    readonly type: ScopedCredentialType;
+}
+
+declare var ScopedCredential: {
+    prototype: ScopedCredential;
+    new(): ScopedCredential;
+};
+
+interface ScopedCredentialInfo {
+    readonly credential: ScopedCredential;
+    readonly publicKey: CryptoKey;
+}
+
+declare var ScopedCredentialInfo: {
+    prototype: ScopedCredentialInfo;
+    new(): ScopedCredentialInfo;
+};
+
+interface ScreenEventMap {
+    "MSOrientationChange": Event;
+}
+
+interface Screen extends EventTarget {
+    readonly availHeight: number;
+    readonly availWidth: number;
+    bufferDepth: number;
+    readonly colorDepth: number;
+    readonly deviceXDPI: number;
+    readonly deviceYDPI: number;
+    readonly fontSmoothingEnabled: boolean;
+    readonly height: number;
+    readonly logicalXDPI: number;
+    readonly logicalYDPI: number;
+    readonly msOrientation: string;
+    onmsorientationchange: (this: Screen, ev: Event) => any;
+    readonly pixelDepth: number;
+    readonly systemXDPI: number;
+    readonly systemYDPI: number;
+    readonly width: number;
+    msLockOrientation(orientations: string | string[]): boolean;
+    msUnlockOrientation(): void;
+    addEventListener<K extends keyof ScreenEventMap>(type: K, listener: (this: Screen, ev: ScreenEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var Screen: {
+    prototype: Screen;
+    new(): Screen;
+};
+
+interface ScriptNotifyEvent extends Event {
+    readonly callingUri: string;
+    readonly value: string;
+}
+
+declare var ScriptNotifyEvent: {
+    prototype: ScriptNotifyEvent;
+    new(): ScriptNotifyEvent;
+};
+
+interface ScriptProcessorNodeEventMap {
+    "audioprocess": AudioProcessingEvent;
+}
+
+interface ScriptProcessorNode extends AudioNode {
+    readonly bufferSize: number;
+    onaudioprocess: (this: ScriptProcessorNode, ev: AudioProcessingEvent) => any;
+    addEventListener<K extends keyof ScriptProcessorNodeEventMap>(type: K, listener: (this: ScriptProcessorNode, ev: ScriptProcessorNodeEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var ScriptProcessorNode: {
+    prototype: ScriptProcessorNode;
+    new(): ScriptProcessorNode;
+};
+
+interface Selection {
+    readonly anchorNode: Node;
+    readonly anchorOffset: number;
+    readonly baseNode: Node;
+    readonly baseOffset: number;
+    readonly extentNode: Node;
+    readonly extentOffset: number;
+    readonly focusNode: Node;
+    readonly focusOffset: number;
+    readonly isCollapsed: boolean;
+    readonly rangeCount: number;
+    readonly type: string;
+    addRange(range: Range): void;
+    collapse(parentNode: Node, offset: number): void;
+    collapseToEnd(): void;
+    collapseToStart(): void;
+    containsNode(node: Node, partlyContained: boolean): boolean;
+    deleteFromDocument(): void;
+    empty(): void;
+    extend(newNode: Node, offset: number): void;
+    getRangeAt(index: number): Range;
+    removeAllRanges(): void;
+    removeRange(range: Range): void;
+    selectAllChildren(parentNode: Node): void;
+    setBaseAndExtent(baseNode: Node, baseOffset: number, extentNode: Node, extentOffset: number): void;
+    setPosition(parentNode: Node, offset: number): void;
+    toString(): string;
+}
+
+declare var Selection: {
+    prototype: Selection;
+    new(): Selection;
+};
+
+interface ServiceWorkerEventMap extends AbstractWorkerEventMap {
+    "statechange": Event;
+}
+
+interface ServiceWorker extends EventTarget, AbstractWorker {
+    onstatechange: (this: ServiceWorker, ev: Event) => any;
+    readonly scriptURL: USVString;
+    readonly state: ServiceWorkerState;
+    postMessage(message: any, transfer?: any[]): void;
+    addEventListener<K extends keyof ServiceWorkerEventMap>(type: K, listener: (this: ServiceWorker, ev: ServiceWorkerEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var ServiceWorker: {
+    prototype: ServiceWorker;
+    new(): ServiceWorker;
+};
+
+interface ServiceWorkerContainerEventMap {
+    "controllerchange": Event;
+    "message": ServiceWorkerMessageEvent;
+}
+
+interface ServiceWorkerContainer extends EventTarget {
+    readonly controller: ServiceWorker | null;
+    oncontrollerchange: (this: ServiceWorkerContainer, ev: Event) => any;
+    onmessage: (this: ServiceWorkerContainer, ev: ServiceWorkerMessageEvent) => any;
+    readonly ready: Promise<ServiceWorkerRegistration>;
+    getRegistration(clientURL?: USVString): Promise<any>;
+    getRegistrations(): any;
+    register(scriptURL: USVString, options?: RegistrationOptions): Promise<ServiceWorkerRegistration>;
+    addEventListener<K extends keyof ServiceWorkerContainerEventMap>(type: K, listener: (this: ServiceWorkerContainer, ev: ServiceWorkerContainerEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var ServiceWorkerContainer: {
+    prototype: ServiceWorkerContainer;
+    new(): ServiceWorkerContainer;
+};
+
+interface ServiceWorkerMessageEvent extends Event {
+    readonly data: any;
+    readonly lastEventId: string;
+    readonly origin: string;
+    readonly ports: MessagePort[] | null;
+    readonly source: ServiceWorker | MessagePort | null;
+}
+
+declare var ServiceWorkerMessageEvent: {
+    prototype: ServiceWorkerMessageEvent;
+    new(type: string, eventInitDict?: ServiceWorkerMessageEventInit): ServiceWorkerMessageEvent;
+};
+
+interface ServiceWorkerRegistrationEventMap {
+    "updatefound": Event;
+}
+
+interface ServiceWorkerRegistration extends EventTarget {
+    readonly active: ServiceWorker | null;
+    readonly installing: ServiceWorker | null;
+    onupdatefound: (this: ServiceWorkerRegistration, ev: Event) => any;
+    readonly pushManager: PushManager;
+    readonly scope: USVString;
+    readonly sync: SyncManager;
+    readonly waiting: ServiceWorker | null;
+    getNotifications(filter?: GetNotificationOptions): any;
+    showNotification(title: string, options?: NotificationOptions): Promise<void>;
+    unregister(): Promise<boolean>;
+    update(): Promise<void>;
+    addEventListener<K extends keyof ServiceWorkerRegistrationEventMap>(type: K, listener: (this: ServiceWorkerRegistration, ev: ServiceWorkerRegistrationEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var ServiceWorkerRegistration: {
+    prototype: ServiceWorkerRegistration;
+    new(): ServiceWorkerRegistration;
+};
+
+interface SourceBuffer extends EventTarget {
+    appendWindowEnd: number;
+    appendWindowStart: number;
+    readonly audioTracks: AudioTrackList;
+    readonly buffered: TimeRanges;
+    mode: AppendMode;
+    timestampOffset: number;
+    readonly updating: boolean;
+    readonly videoTracks: VideoTrackList;
+    abort(): void;
+    appendBuffer(data: ArrayBuffer | ArrayBufferView): void;
+    appendStream(stream: MSStream, maxSize?: number): void;
+    remove(start: number, end: number): void;
+}
+
+declare var SourceBuffer: {
+    prototype: SourceBuffer;
+    new(): SourceBuffer;
+};
+
+interface SourceBufferList extends EventTarget {
+    readonly length: number;
+    item(index: number): SourceBuffer;
+    [index: number]: SourceBuffer;
+}
+
+declare var SourceBufferList: {
+    prototype: SourceBufferList;
+    new(): SourceBufferList;
+};
+
+interface SpeechSynthesisEventMap {
+    "voiceschanged": Event;
+}
+
+interface SpeechSynthesis extends EventTarget {
+    onvoiceschanged: (this: SpeechSynthesis, ev: Event) => any;
+    readonly paused: boolean;
+    readonly pending: boolean;
+    readonly speaking: boolean;
+    cancel(): void;
+    getVoices(): SpeechSynthesisVoice[];
+    pause(): void;
+    resume(): void;
+    speak(utterance: SpeechSynthesisUtterance): void;
+    addEventListener<K extends keyof SpeechSynthesisEventMap>(type: K, listener: (this: SpeechSynthesis, ev: SpeechSynthesisEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SpeechSynthesis: {
+    prototype: SpeechSynthesis;
+    new(): SpeechSynthesis;
+};
+
+interface SpeechSynthesisEvent extends Event {
+    readonly charIndex: number;
+    readonly elapsedTime: number;
+    readonly name: string;
+    readonly utterance: SpeechSynthesisUtterance | null;
+}
+
+declare var SpeechSynthesisEvent: {
+    prototype: SpeechSynthesisEvent;
+    new(type: string, eventInitDict?: SpeechSynthesisEventInit): SpeechSynthesisEvent;
+};
+
+interface SpeechSynthesisUtteranceEventMap {
+    "boundary": Event;
+    "end": Event;
+    "error": Event;
+    "mark": Event;
+    "pause": Event;
+    "resume": Event;
+    "start": Event;
+}
+
+interface SpeechSynthesisUtterance extends EventTarget {
+    lang: string;
+    onboundary: (this: SpeechSynthesisUtterance, ev: Event) => any;
+    onend: (this: SpeechSynthesisUtterance, ev: Event) => any;
+    onerror: (this: SpeechSynthesisUtterance, ev: Event) => any;
+    onmark: (this: SpeechSynthesisUtterance, ev: Event) => any;
+    onpause: (this: SpeechSynthesisUtterance, ev: Event) => any;
+    onresume: (this: SpeechSynthesisUtterance, ev: Event) => any;
+    onstart: (this: SpeechSynthesisUtterance, ev: Event) => any;
+    pitch: number;
+    rate: number;
+    text: string;
+    voice: SpeechSynthesisVoice;
+    volume: number;
+    addEventListener<K extends keyof SpeechSynthesisUtteranceEventMap>(type: K, listener: (this: SpeechSynthesisUtterance, ev: SpeechSynthesisUtteranceEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SpeechSynthesisUtterance: {
+    prototype: SpeechSynthesisUtterance;
+    new(text?: string): SpeechSynthesisUtterance;
+};
+
+interface SpeechSynthesisVoice {
+    readonly default: boolean;
+    readonly lang: string;
+    readonly localService: boolean;
+    readonly name: string;
+    readonly voiceURI: string;
+}
+
+declare var SpeechSynthesisVoice: {
+    prototype: SpeechSynthesisVoice;
+    new(): SpeechSynthesisVoice;
+};
+
+interface StereoPannerNode extends AudioNode {
+    readonly pan: AudioParam;
+}
+
+declare var StereoPannerNode: {
+    prototype: StereoPannerNode;
+    new(): StereoPannerNode;
+};
+
+interface Storage {
+    readonly length: number;
+    clear(): void;
+    getItem(key: string): string | null;
+    key(index: number): string | null;
+    removeItem(key: string): void;
+    setItem(key: string, data: string): void;
+    [key: string]: any;
+    [index: number]: string;
+}
+
+declare var Storage: {
+    prototype: Storage;
+    new(): Storage;
+};
+
+interface StorageEvent extends Event {
+    readonly url: string;
+    key?: string;
+    oldValue?: string;
+    newValue?: string;
+    storageArea?: Storage;
+}
+
+declare var StorageEvent: {
+    prototype: StorageEvent;
+    new (type: string, eventInitDict?: StorageEventInit): StorageEvent;
+};
+
+interface StyleMedia {
+    readonly type: string;
+    matchMedium(mediaquery: string): boolean;
+}
+
+declare var StyleMedia: {
+    prototype: StyleMedia;
+    new(): StyleMedia;
+};
+
+interface StyleSheet {
+    disabled: boolean;
+    readonly href: string;
+    readonly media: MediaList;
+    readonly ownerNode: Node;
+    readonly parentStyleSheet: StyleSheet;
+    readonly title: string;
+    readonly type: string;
+}
+
+declare var StyleSheet: {
+    prototype: StyleSheet;
+    new(): StyleSheet;
+};
+
+interface StyleSheetList {
+    readonly length: number;
+    item(index?: number): StyleSheet;
+    [index: number]: StyleSheet;
+}
+
+declare var StyleSheetList: {
+    prototype: StyleSheetList;
+    new(): StyleSheetList;
+};
+
+interface StyleSheetPageList {
+    readonly length: number;
+    item(index: number): CSSPageRule;
+    [index: number]: CSSPageRule;
+}
+
+declare var StyleSheetPageList: {
+    prototype: StyleSheetPageList;
+    new(): StyleSheetPageList;
+};
+
+interface SubtleCrypto {
+    decrypt(algorithm: string | RsaOaepParams | AesCtrParams | AesCbcParams | AesCmacParams | AesGcmParams | AesCfbParams, key: CryptoKey, data: BufferSource): PromiseLike<ArrayBuffer>;
+    deriveBits(algorithm: string | EcdhKeyDeriveParams | DhKeyDeriveParams | ConcatParams | HkdfCtrParams | Pbkdf2Params, baseKey: CryptoKey, length: number): PromiseLike<ArrayBuffer>;
+    deriveKey(algorithm: string | EcdhKeyDeriveParams | DhKeyDeriveParams | ConcatParams | HkdfCtrParams | Pbkdf2Params, baseKey: CryptoKey, derivedKeyType: string | AesDerivedKeyParams | HmacImportParams | ConcatParams | HkdfCtrParams | Pbkdf2Params, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
+    digest(algorithm: AlgorithmIdentifier, data: BufferSource): PromiseLike<ArrayBuffer>;
+    encrypt(algorithm: string | RsaOaepParams | AesCtrParams | AesCbcParams | AesCmacParams | AesGcmParams | AesCfbParams, key: CryptoKey, data: BufferSource): PromiseLike<ArrayBuffer>;
+    exportKey(format: "jwk", key: CryptoKey): PromiseLike<JsonWebKey>;
+    exportKey(format: "raw" | "pkcs8" | "spki", key: CryptoKey): PromiseLike<ArrayBuffer>;
+    exportKey(format: string, key: CryptoKey): PromiseLike<JsonWebKey | ArrayBuffer>;
+    generateKey(algorithm: string, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKeyPair | CryptoKey>;
+    generateKey(algorithm: RsaHashedKeyGenParams | EcKeyGenParams | DhKeyGenParams, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKeyPair>;
+    generateKey(algorithm: AesKeyGenParams | HmacKeyGenParams | Pbkdf2Params, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
+    importKey(format: "jwk", keyData: JsonWebKey, algorithm: string | RsaHashedImportParams | EcKeyImportParams | HmacImportParams | DhImportKeyParams, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
+    importKey(format: "raw" | "pkcs8" | "spki", keyData: BufferSource, algorithm: string | RsaHashedImportParams | EcKeyImportParams | HmacImportParams | DhImportKeyParams, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
+    importKey(format: string, keyData: JsonWebKey | BufferSource, algorithm: string | RsaHashedImportParams | EcKeyImportParams | HmacImportParams | DhImportKeyParams, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
+    sign(algorithm: string | RsaPssParams | EcdsaParams | AesCmacParams, key: CryptoKey, data: BufferSource): PromiseLike<ArrayBuffer>;
+    unwrapKey(format: string, wrappedKey: BufferSource, unwrappingKey: CryptoKey, unwrapAlgorithm: AlgorithmIdentifier, unwrappedKeyAlgorithm: AlgorithmIdentifier, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
+    verify(algorithm: string | RsaPssParams | EcdsaParams | AesCmacParams, key: CryptoKey, signature: BufferSource, data: BufferSource): PromiseLike<boolean>;
+    wrapKey(format: string, key: CryptoKey, wrappingKey: CryptoKey, wrapAlgorithm: AlgorithmIdentifier): PromiseLike<ArrayBuffer>;
+}
+
+declare var SubtleCrypto: {
+    prototype: SubtleCrypto;
+    new(): SubtleCrypto;
+};
+
+interface SVGAElement extends SVGGraphicsElement, SVGURIReference {
+    readonly target: SVGAnimatedString;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGAElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGAElement: {
+    prototype: SVGAElement;
+    new(): SVGAElement;
+};
+
+interface SVGAngle {
+    readonly unitType: number;
+    value: number;
+    valueAsString: string;
+    valueInSpecifiedUnits: number;
+    convertToSpecifiedUnits(unitType: number): void;
+    newValueSpecifiedUnits(unitType: number, valueInSpecifiedUnits: number): void;
+    readonly SVG_ANGLETYPE_DEG: number;
+    readonly SVG_ANGLETYPE_GRAD: number;
+    readonly SVG_ANGLETYPE_RAD: number;
+    readonly SVG_ANGLETYPE_UNKNOWN: number;
+    readonly SVG_ANGLETYPE_UNSPECIFIED: number;
+}
+
+declare var SVGAngle: {
+    prototype: SVGAngle;
+    new(): SVGAngle;
+    readonly SVG_ANGLETYPE_DEG: number;
+    readonly SVG_ANGLETYPE_GRAD: number;
+    readonly SVG_ANGLETYPE_RAD: number;
+    readonly SVG_ANGLETYPE_UNKNOWN: number;
+    readonly SVG_ANGLETYPE_UNSPECIFIED: number;
+};
+
+interface SVGAnimatedAngle {
+    readonly animVal: SVGAngle;
+    readonly baseVal: SVGAngle;
+}
+
+declare var SVGAnimatedAngle: {
+    prototype: SVGAnimatedAngle;
+    new(): SVGAnimatedAngle;
+};
+
+interface SVGAnimatedBoolean {
+    readonly animVal: boolean;
+    baseVal: boolean;
+}
+
+declare var SVGAnimatedBoolean: {
+    prototype: SVGAnimatedBoolean;
+    new(): SVGAnimatedBoolean;
+};
+
+interface SVGAnimatedEnumeration {
+    readonly animVal: number;
+    baseVal: number;
+}
+
+declare var SVGAnimatedEnumeration: {
+    prototype: SVGAnimatedEnumeration;
+    new(): SVGAnimatedEnumeration;
+};
+
+interface SVGAnimatedInteger {
+    readonly animVal: number;
+    baseVal: number;
+}
+
+declare var SVGAnimatedInteger: {
+    prototype: SVGAnimatedInteger;
+    new(): SVGAnimatedInteger;
+};
+
+interface SVGAnimatedLength {
+    readonly animVal: SVGLength;
+    readonly baseVal: SVGLength;
+}
+
+declare var SVGAnimatedLength: {
+    prototype: SVGAnimatedLength;
+    new(): SVGAnimatedLength;
+};
+
+interface SVGAnimatedLengthList {
+    readonly animVal: SVGLengthList;
+    readonly baseVal: SVGLengthList;
+}
+
+declare var SVGAnimatedLengthList: {
+    prototype: SVGAnimatedLengthList;
+    new(): SVGAnimatedLengthList;
+};
+
+interface SVGAnimatedNumber {
+    readonly animVal: number;
+    baseVal: number;
+}
+
+declare var SVGAnimatedNumber: {
+    prototype: SVGAnimatedNumber;
+    new(): SVGAnimatedNumber;
+};
+
+interface SVGAnimatedNumberList {
+    readonly animVal: SVGNumberList;
+    readonly baseVal: SVGNumberList;
+}
+
+declare var SVGAnimatedNumberList: {
+    prototype: SVGAnimatedNumberList;
+    new(): SVGAnimatedNumberList;
+};
+
+interface SVGAnimatedPreserveAspectRatio {
+    readonly animVal: SVGPreserveAspectRatio;
+    readonly baseVal: SVGPreserveAspectRatio;
+}
+
+declare var SVGAnimatedPreserveAspectRatio: {
+    prototype: SVGAnimatedPreserveAspectRatio;
+    new(): SVGAnimatedPreserveAspectRatio;
+};
+
+interface SVGAnimatedRect {
+    readonly animVal: SVGRect;
+    readonly baseVal: SVGRect;
+}
+
+declare var SVGAnimatedRect: {
+    prototype: SVGAnimatedRect;
+    new(): SVGAnimatedRect;
+};
+
+interface SVGAnimatedString {
+    readonly animVal: string;
+    baseVal: string;
+}
+
+declare var SVGAnimatedString: {
+    prototype: SVGAnimatedString;
+    new(): SVGAnimatedString;
+};
+
+interface SVGAnimatedTransformList {
+    readonly animVal: SVGTransformList;
+    readonly baseVal: SVGTransformList;
+}
+
+declare var SVGAnimatedTransformList: {
+    prototype: SVGAnimatedTransformList;
+    new(): SVGAnimatedTransformList;
+};
+
+interface SVGCircleElement extends SVGGraphicsElement {
+    readonly cx: SVGAnimatedLength;
+    readonly cy: SVGAnimatedLength;
+    readonly r: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGCircleElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGCircleElement: {
+    prototype: SVGCircleElement;
+    new(): SVGCircleElement;
+};
+
+interface SVGClipPathElement extends SVGGraphicsElement, SVGUnitTypes {
+    readonly clipPathUnits: SVGAnimatedEnumeration;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGClipPathElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGClipPathElement: {
+    prototype: SVGClipPathElement;
+    new(): SVGClipPathElement;
+};
+
+interface SVGComponentTransferFunctionElement extends SVGElement {
+    readonly amplitude: SVGAnimatedNumber;
+    readonly exponent: SVGAnimatedNumber;
+    readonly intercept: SVGAnimatedNumber;
+    readonly offset: SVGAnimatedNumber;
+    readonly slope: SVGAnimatedNumber;
+    readonly tableValues: SVGAnimatedNumberList;
+    readonly type: SVGAnimatedEnumeration;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_DISCRETE: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_GAMMA: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_IDENTITY: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_LINEAR: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_TABLE: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGComponentTransferFunctionElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGComponentTransferFunctionElement: {
+    prototype: SVGComponentTransferFunctionElement;
+    new(): SVGComponentTransferFunctionElement;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_DISCRETE: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_GAMMA: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_IDENTITY: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_LINEAR: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_TABLE: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_UNKNOWN: number;
+};
+
+interface SVGDefsElement extends SVGGraphicsElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGDefsElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGDefsElement: {
+    prototype: SVGDefsElement;
+    new(): SVGDefsElement;
+};
+
+interface SVGDescElement extends SVGElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGDescElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGDescElement: {
+    prototype: SVGDescElement;
+    new(): SVGDescElement;
+};
+
+interface SVGElementEventMap extends ElementEventMap {
+    "click": MouseEvent;
+    "dblclick": MouseEvent;
+    "focusin": FocusEvent;
+    "focusout": FocusEvent;
+    "load": Event;
+    "mousedown": MouseEvent;
+    "mousemove": MouseEvent;
+    "mouseout": MouseEvent;
+    "mouseover": MouseEvent;
+    "mouseup": MouseEvent;
+}
+
+interface SVGElement extends Element {
+    className: any;
+    onclick: (this: SVGElement, ev: MouseEvent) => any;
+    ondblclick: (this: SVGElement, ev: MouseEvent) => any;
+    onfocusin: (this: SVGElement, ev: FocusEvent) => any;
+    onfocusout: (this: SVGElement, ev: FocusEvent) => any;
+    onload: (this: SVGElement, ev: Event) => any;
+    onmousedown: (this: SVGElement, ev: MouseEvent) => any;
+    onmousemove: (this: SVGElement, ev: MouseEvent) => any;
+    onmouseout: (this: SVGElement, ev: MouseEvent) => any;
+    onmouseover: (this: SVGElement, ev: MouseEvent) => any;
+    onmouseup: (this: SVGElement, ev: MouseEvent) => any;
+    readonly ownerSVGElement: SVGSVGElement;
+    readonly style: CSSStyleDeclaration;
+    readonly viewportElement: SVGElement;
+    xmlbase: string;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGElement: {
+    prototype: SVGElement;
+    new(): SVGElement;
+};
+
+interface SVGElementInstance extends EventTarget {
+    readonly childNodes: SVGElementInstanceList;
+    readonly correspondingElement: SVGElement;
+    readonly correspondingUseElement: SVGUseElement;
+    readonly firstChild: SVGElementInstance;
+    readonly lastChild: SVGElementInstance;
+    readonly nextSibling: SVGElementInstance;
+    readonly parentNode: SVGElementInstance;
+    readonly previousSibling: SVGElementInstance;
+}
+
+declare var SVGElementInstance: {
+    prototype: SVGElementInstance;
+    new(): SVGElementInstance;
+};
+
+interface SVGElementInstanceList {
+    readonly length: number;
+    item(index: number): SVGElementInstance;
+}
+
+declare var SVGElementInstanceList: {
+    prototype: SVGElementInstanceList;
+    new(): SVGElementInstanceList;
+};
+
+interface SVGEllipseElement extends SVGGraphicsElement {
+    readonly cx: SVGAnimatedLength;
+    readonly cy: SVGAnimatedLength;
+    readonly rx: SVGAnimatedLength;
+    readonly ry: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGEllipseElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGEllipseElement: {
+    prototype: SVGEllipseElement;
+    new(): SVGEllipseElement;
+};
+
+interface SVGFEBlendElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    readonly in2: SVGAnimatedString;
+    readonly mode: SVGAnimatedEnumeration;
+    readonly SVG_FEBLEND_MODE_COLOR: number;
+    readonly SVG_FEBLEND_MODE_COLOR_BURN: number;
+    readonly SVG_FEBLEND_MODE_COLOR_DODGE: number;
+    readonly SVG_FEBLEND_MODE_DARKEN: number;
+    readonly SVG_FEBLEND_MODE_DIFFERENCE: number;
+    readonly SVG_FEBLEND_MODE_EXCLUSION: number;
+    readonly SVG_FEBLEND_MODE_HARD_LIGHT: number;
+    readonly SVG_FEBLEND_MODE_HUE: number;
+    readonly SVG_FEBLEND_MODE_LIGHTEN: number;
+    readonly SVG_FEBLEND_MODE_LUMINOSITY: number;
+    readonly SVG_FEBLEND_MODE_MULTIPLY: number;
+    readonly SVG_FEBLEND_MODE_NORMAL: number;
+    readonly SVG_FEBLEND_MODE_OVERLAY: number;
+    readonly SVG_FEBLEND_MODE_SATURATION: number;
+    readonly SVG_FEBLEND_MODE_SCREEN: number;
+    readonly SVG_FEBLEND_MODE_SOFT_LIGHT: number;
+    readonly SVG_FEBLEND_MODE_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEBlendElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEBlendElement: {
+    prototype: SVGFEBlendElement;
+    new(): SVGFEBlendElement;
+    readonly SVG_FEBLEND_MODE_COLOR: number;
+    readonly SVG_FEBLEND_MODE_COLOR_BURN: number;
+    readonly SVG_FEBLEND_MODE_COLOR_DODGE: number;
+    readonly SVG_FEBLEND_MODE_DARKEN: number;
+    readonly SVG_FEBLEND_MODE_DIFFERENCE: number;
+    readonly SVG_FEBLEND_MODE_EXCLUSION: number;
+    readonly SVG_FEBLEND_MODE_HARD_LIGHT: number;
+    readonly SVG_FEBLEND_MODE_HUE: number;
+    readonly SVG_FEBLEND_MODE_LIGHTEN: number;
+    readonly SVG_FEBLEND_MODE_LUMINOSITY: number;
+    readonly SVG_FEBLEND_MODE_MULTIPLY: number;
+    readonly SVG_FEBLEND_MODE_NORMAL: number;
+    readonly SVG_FEBLEND_MODE_OVERLAY: number;
+    readonly SVG_FEBLEND_MODE_SATURATION: number;
+    readonly SVG_FEBLEND_MODE_SCREEN: number;
+    readonly SVG_FEBLEND_MODE_SOFT_LIGHT: number;
+    readonly SVG_FEBLEND_MODE_UNKNOWN: number;
+};
+
+interface SVGFEColorMatrixElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    readonly type: SVGAnimatedEnumeration;
+    readonly values: SVGAnimatedNumberList;
+    readonly SVG_FECOLORMATRIX_TYPE_HUEROTATE: number;
+    readonly SVG_FECOLORMATRIX_TYPE_LUMINANCETOALPHA: number;
+    readonly SVG_FECOLORMATRIX_TYPE_MATRIX: number;
+    readonly SVG_FECOLORMATRIX_TYPE_SATURATE: number;
+    readonly SVG_FECOLORMATRIX_TYPE_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEColorMatrixElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEColorMatrixElement: {
+    prototype: SVGFEColorMatrixElement;
+    new(): SVGFEColorMatrixElement;
+    readonly SVG_FECOLORMATRIX_TYPE_HUEROTATE: number;
+    readonly SVG_FECOLORMATRIX_TYPE_LUMINANCETOALPHA: number;
+    readonly SVG_FECOLORMATRIX_TYPE_MATRIX: number;
+    readonly SVG_FECOLORMATRIX_TYPE_SATURATE: number;
+    readonly SVG_FECOLORMATRIX_TYPE_UNKNOWN: number;
+};
+
+interface SVGFEComponentTransferElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEComponentTransferElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEComponentTransferElement: {
+    prototype: SVGFEComponentTransferElement;
+    new(): SVGFEComponentTransferElement;
+};
+
+interface SVGFECompositeElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    readonly in2: SVGAnimatedString;
+    readonly k1: SVGAnimatedNumber;
+    readonly k2: SVGAnimatedNumber;
+    readonly k3: SVGAnimatedNumber;
+    readonly k4: SVGAnimatedNumber;
+    readonly operator: SVGAnimatedEnumeration;
+    readonly SVG_FECOMPOSITE_OPERATOR_ARITHMETIC: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_ATOP: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_IN: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_OUT: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_OVER: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_UNKNOWN: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_XOR: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFECompositeElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFECompositeElement: {
+    prototype: SVGFECompositeElement;
+    new(): SVGFECompositeElement;
+    readonly SVG_FECOMPOSITE_OPERATOR_ARITHMETIC: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_ATOP: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_IN: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_OUT: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_OVER: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_UNKNOWN: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_XOR: number;
+};
+
+interface SVGFEConvolveMatrixElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly bias: SVGAnimatedNumber;
+    readonly divisor: SVGAnimatedNumber;
+    readonly edgeMode: SVGAnimatedEnumeration;
+    readonly in1: SVGAnimatedString;
+    readonly kernelMatrix: SVGAnimatedNumberList;
+    readonly kernelUnitLengthX: SVGAnimatedNumber;
+    readonly kernelUnitLengthY: SVGAnimatedNumber;
+    readonly orderX: SVGAnimatedInteger;
+    readonly orderY: SVGAnimatedInteger;
+    readonly preserveAlpha: SVGAnimatedBoolean;
+    readonly targetX: SVGAnimatedInteger;
+    readonly targetY: SVGAnimatedInteger;
+    readonly SVG_EDGEMODE_DUPLICATE: number;
+    readonly SVG_EDGEMODE_NONE: number;
+    readonly SVG_EDGEMODE_UNKNOWN: number;
+    readonly SVG_EDGEMODE_WRAP: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEConvolveMatrixElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEConvolveMatrixElement: {
+    prototype: SVGFEConvolveMatrixElement;
+    new(): SVGFEConvolveMatrixElement;
+    readonly SVG_EDGEMODE_DUPLICATE: number;
+    readonly SVG_EDGEMODE_NONE: number;
+    readonly SVG_EDGEMODE_UNKNOWN: number;
+    readonly SVG_EDGEMODE_WRAP: number;
+};
+
+interface SVGFEDiffuseLightingElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly diffuseConstant: SVGAnimatedNumber;
+    readonly in1: SVGAnimatedString;
+    readonly kernelUnitLengthX: SVGAnimatedNumber;
+    readonly kernelUnitLengthY: SVGAnimatedNumber;
+    readonly surfaceScale: SVGAnimatedNumber;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEDiffuseLightingElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEDiffuseLightingElement: {
+    prototype: SVGFEDiffuseLightingElement;
+    new(): SVGFEDiffuseLightingElement;
+};
+
+interface SVGFEDisplacementMapElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    readonly in2: SVGAnimatedString;
+    readonly scale: SVGAnimatedNumber;
+    readonly xChannelSelector: SVGAnimatedEnumeration;
+    readonly yChannelSelector: SVGAnimatedEnumeration;
+    readonly SVG_CHANNEL_A: number;
+    readonly SVG_CHANNEL_B: number;
+    readonly SVG_CHANNEL_G: number;
+    readonly SVG_CHANNEL_R: number;
+    readonly SVG_CHANNEL_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEDisplacementMapElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEDisplacementMapElement: {
+    prototype: SVGFEDisplacementMapElement;
+    new(): SVGFEDisplacementMapElement;
+    readonly SVG_CHANNEL_A: number;
+    readonly SVG_CHANNEL_B: number;
+    readonly SVG_CHANNEL_G: number;
+    readonly SVG_CHANNEL_R: number;
+    readonly SVG_CHANNEL_UNKNOWN: number;
+};
+
+interface SVGFEDistantLightElement extends SVGElement {
+    readonly azimuth: SVGAnimatedNumber;
+    readonly elevation: SVGAnimatedNumber;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEDistantLightElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEDistantLightElement: {
+    prototype: SVGFEDistantLightElement;
+    new(): SVGFEDistantLightElement;
+};
+
+interface SVGFEFloodElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEFloodElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEFloodElement: {
+    prototype: SVGFEFloodElement;
+    new(): SVGFEFloodElement;
+};
+
+interface SVGFEFuncAElement extends SVGComponentTransferFunctionElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEFuncAElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEFuncAElement: {
+    prototype: SVGFEFuncAElement;
+    new(): SVGFEFuncAElement;
+};
+
+interface SVGFEFuncBElement extends SVGComponentTransferFunctionElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEFuncBElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEFuncBElement: {
+    prototype: SVGFEFuncBElement;
+    new(): SVGFEFuncBElement;
+};
+
+interface SVGFEFuncGElement extends SVGComponentTransferFunctionElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEFuncGElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEFuncGElement: {
+    prototype: SVGFEFuncGElement;
+    new(): SVGFEFuncGElement;
+};
+
+interface SVGFEFuncRElement extends SVGComponentTransferFunctionElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEFuncRElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEFuncRElement: {
+    prototype: SVGFEFuncRElement;
+    new(): SVGFEFuncRElement;
+};
+
+interface SVGFEGaussianBlurElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    readonly stdDeviationX: SVGAnimatedNumber;
+    readonly stdDeviationY: SVGAnimatedNumber;
+    setStdDeviation(stdDeviationX: number, stdDeviationY: number): void;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEGaussianBlurElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEGaussianBlurElement: {
+    prototype: SVGFEGaussianBlurElement;
+    new(): SVGFEGaussianBlurElement;
+};
+
+interface SVGFEImageElement extends SVGElement, SVGFilterPrimitiveStandardAttributes, SVGURIReference {
+    readonly preserveAspectRatio: SVGAnimatedPreserveAspectRatio;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEImageElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEImageElement: {
+    prototype: SVGFEImageElement;
+    new(): SVGFEImageElement;
+};
+
+interface SVGFEMergeElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEMergeElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEMergeElement: {
+    prototype: SVGFEMergeElement;
+    new(): SVGFEMergeElement;
+};
+
+interface SVGFEMergeNodeElement extends SVGElement {
+    readonly in1: SVGAnimatedString;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEMergeNodeElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEMergeNodeElement: {
+    prototype: SVGFEMergeNodeElement;
+    new(): SVGFEMergeNodeElement;
+};
+
+interface SVGFEMorphologyElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    readonly operator: SVGAnimatedEnumeration;
+    readonly radiusX: SVGAnimatedNumber;
+    readonly radiusY: SVGAnimatedNumber;
+    readonly SVG_MORPHOLOGY_OPERATOR_DILATE: number;
+    readonly SVG_MORPHOLOGY_OPERATOR_ERODE: number;
+    readonly SVG_MORPHOLOGY_OPERATOR_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEMorphologyElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEMorphologyElement: {
+    prototype: SVGFEMorphologyElement;
+    new(): SVGFEMorphologyElement;
+    readonly SVG_MORPHOLOGY_OPERATOR_DILATE: number;
+    readonly SVG_MORPHOLOGY_OPERATOR_ERODE: number;
+    readonly SVG_MORPHOLOGY_OPERATOR_UNKNOWN: number;
+};
+
+interface SVGFEOffsetElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly dx: SVGAnimatedNumber;
+    readonly dy: SVGAnimatedNumber;
+    readonly in1: SVGAnimatedString;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEOffsetElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEOffsetElement: {
+    prototype: SVGFEOffsetElement;
+    new(): SVGFEOffsetElement;
+};
+
+interface SVGFEPointLightElement extends SVGElement {
+    readonly x: SVGAnimatedNumber;
+    readonly y: SVGAnimatedNumber;
+    readonly z: SVGAnimatedNumber;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEPointLightElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEPointLightElement: {
+    prototype: SVGFEPointLightElement;
+    new(): SVGFEPointLightElement;
+};
+
+interface SVGFESpecularLightingElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    readonly kernelUnitLengthX: SVGAnimatedNumber;
+    readonly kernelUnitLengthY: SVGAnimatedNumber;
+    readonly specularConstant: SVGAnimatedNumber;
+    readonly specularExponent: SVGAnimatedNumber;
+    readonly surfaceScale: SVGAnimatedNumber;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFESpecularLightingElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFESpecularLightingElement: {
+    prototype: SVGFESpecularLightingElement;
+    new(): SVGFESpecularLightingElement;
+};
+
+interface SVGFESpotLightElement extends SVGElement {
+    readonly limitingConeAngle: SVGAnimatedNumber;
+    readonly pointsAtX: SVGAnimatedNumber;
+    readonly pointsAtY: SVGAnimatedNumber;
+    readonly pointsAtZ: SVGAnimatedNumber;
+    readonly specularExponent: SVGAnimatedNumber;
+    readonly x: SVGAnimatedNumber;
+    readonly y: SVGAnimatedNumber;
+    readonly z: SVGAnimatedNumber;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFESpotLightElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFESpotLightElement: {
+    prototype: SVGFESpotLightElement;
+    new(): SVGFESpotLightElement;
+};
+
+interface SVGFETileElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFETileElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFETileElement: {
+    prototype: SVGFETileElement;
+    new(): SVGFETileElement;
+};
+
+interface SVGFETurbulenceElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly baseFrequencyX: SVGAnimatedNumber;
+    readonly baseFrequencyY: SVGAnimatedNumber;
+    readonly numOctaves: SVGAnimatedInteger;
+    readonly seed: SVGAnimatedNumber;
+    readonly stitchTiles: SVGAnimatedEnumeration;
+    readonly type: SVGAnimatedEnumeration;
+    readonly SVG_STITCHTYPE_NOSTITCH: number;
+    readonly SVG_STITCHTYPE_STITCH: number;
+    readonly SVG_STITCHTYPE_UNKNOWN: number;
+    readonly SVG_TURBULENCE_TYPE_FRACTALNOISE: number;
+    readonly SVG_TURBULENCE_TYPE_TURBULENCE: number;
+    readonly SVG_TURBULENCE_TYPE_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFETurbulenceElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFETurbulenceElement: {
+    prototype: SVGFETurbulenceElement;
+    new(): SVGFETurbulenceElement;
+    readonly SVG_STITCHTYPE_NOSTITCH: number;
+    readonly SVG_STITCHTYPE_STITCH: number;
+    readonly SVG_STITCHTYPE_UNKNOWN: number;
+    readonly SVG_TURBULENCE_TYPE_FRACTALNOISE: number;
+    readonly SVG_TURBULENCE_TYPE_TURBULENCE: number;
+    readonly SVG_TURBULENCE_TYPE_UNKNOWN: number;
+};
+
+interface SVGFilterElement extends SVGElement, SVGUnitTypes, SVGURIReference {
+    readonly filterResX: SVGAnimatedInteger;
+    readonly filterResY: SVGAnimatedInteger;
+    readonly filterUnits: SVGAnimatedEnumeration;
+    readonly height: SVGAnimatedLength;
+    readonly primitiveUnits: SVGAnimatedEnumeration;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+    setFilterRes(filterResX: number, filterResY: number): void;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFilterElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFilterElement: {
+    prototype: SVGFilterElement;
+    new(): SVGFilterElement;
+};
+
+interface SVGForeignObjectElement extends SVGGraphicsElement {
+    readonly height: SVGAnimatedLength;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGForeignObjectElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGForeignObjectElement: {
+    prototype: SVGForeignObjectElement;
+    new(): SVGForeignObjectElement;
+};
+
+interface SVGGElement extends SVGGraphicsElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGGElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGGElement: {
+    prototype: SVGGElement;
+    new(): SVGGElement;
+};
+
+interface SVGGradientElement extends SVGElement, SVGUnitTypes, SVGURIReference {
+    readonly gradientTransform: SVGAnimatedTransformList;
+    readonly gradientUnits: SVGAnimatedEnumeration;
+    readonly spreadMethod: SVGAnimatedEnumeration;
+    readonly SVG_SPREADMETHOD_PAD: number;
+    readonly SVG_SPREADMETHOD_REFLECT: number;
+    readonly SVG_SPREADMETHOD_REPEAT: number;
+    readonly SVG_SPREADMETHOD_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGGradientElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGGradientElement: {
+    prototype: SVGGradientElement;
+    new(): SVGGradientElement;
+    readonly SVG_SPREADMETHOD_PAD: number;
+    readonly SVG_SPREADMETHOD_REFLECT: number;
+    readonly SVG_SPREADMETHOD_REPEAT: number;
+    readonly SVG_SPREADMETHOD_UNKNOWN: number;
+};
+
+interface SVGGraphicsElement extends SVGElement, SVGTests {
+    readonly farthestViewportElement: SVGElement;
+    readonly nearestViewportElement: SVGElement;
+    readonly transform: SVGAnimatedTransformList;
+    getBBox(): SVGRect;
+    getCTM(): SVGMatrix;
+    getScreenCTM(): SVGMatrix;
+    getTransformToElement(element: SVGElement): SVGMatrix;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGGraphicsElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGGraphicsElement: {
+    prototype: SVGGraphicsElement;
+    new(): SVGGraphicsElement;
+};
+
+interface SVGImageElement extends SVGGraphicsElement, SVGURIReference {
+    readonly height: SVGAnimatedLength;
+    readonly preserveAspectRatio: SVGAnimatedPreserveAspectRatio;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGImageElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGImageElement: {
+    prototype: SVGImageElement;
+    new(): SVGImageElement;
+};
+
+interface SVGLength {
+    readonly unitType: number;
+    value: number;
+    valueAsString: string;
+    valueInSpecifiedUnits: number;
+    convertToSpecifiedUnits(unitType: number): void;
+    newValueSpecifiedUnits(unitType: number, valueInSpecifiedUnits: number): void;
+    readonly SVG_LENGTHTYPE_CM: number;
+    readonly SVG_LENGTHTYPE_EMS: number;
+    readonly SVG_LENGTHTYPE_EXS: number;
+    readonly SVG_LENGTHTYPE_IN: number;
+    readonly SVG_LENGTHTYPE_MM: number;
+    readonly SVG_LENGTHTYPE_NUMBER: number;
+    readonly SVG_LENGTHTYPE_PC: number;
+    readonly SVG_LENGTHTYPE_PERCENTAGE: number;
+    readonly SVG_LENGTHTYPE_PT: number;
+    readonly SVG_LENGTHTYPE_PX: number;
+    readonly SVG_LENGTHTYPE_UNKNOWN: number;
+}
+
+declare var SVGLength: {
+    prototype: SVGLength;
+    new(): SVGLength;
+    readonly SVG_LENGTHTYPE_CM: number;
+    readonly SVG_LENGTHTYPE_EMS: number;
+    readonly SVG_LENGTHTYPE_EXS: number;
+    readonly SVG_LENGTHTYPE_IN: number;
+    readonly SVG_LENGTHTYPE_MM: number;
+    readonly SVG_LENGTHTYPE_NUMBER: number;
+    readonly SVG_LENGTHTYPE_PC: number;
+    readonly SVG_LENGTHTYPE_PERCENTAGE: number;
+    readonly SVG_LENGTHTYPE_PT: number;
+    readonly SVG_LENGTHTYPE_PX: number;
+    readonly SVG_LENGTHTYPE_UNKNOWN: number;
+};
+
+interface SVGLengthList {
+    readonly numberOfItems: number;
+    appendItem(newItem: SVGLength): SVGLength;
+    clear(): void;
+    getItem(index: number): SVGLength;
+    initialize(newItem: SVGLength): SVGLength;
+    insertItemBefore(newItem: SVGLength, index: number): SVGLength;
+    removeItem(index: number): SVGLength;
+    replaceItem(newItem: SVGLength, index: number): SVGLength;
+}
+
+declare var SVGLengthList: {
+    prototype: SVGLengthList;
+    new(): SVGLengthList;
+};
+
+interface SVGLinearGradientElement extends SVGGradientElement {
+    readonly x1: SVGAnimatedLength;
+    readonly x2: SVGAnimatedLength;
+    readonly y1: SVGAnimatedLength;
+    readonly y2: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGLinearGradientElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGLinearGradientElement: {
+    prototype: SVGLinearGradientElement;
+    new(): SVGLinearGradientElement;
+};
+
+interface SVGLineElement extends SVGGraphicsElement {
+    readonly x1: SVGAnimatedLength;
+    readonly x2: SVGAnimatedLength;
+    readonly y1: SVGAnimatedLength;
+    readonly y2: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGLineElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGLineElement: {
+    prototype: SVGLineElement;
+    new(): SVGLineElement;
+};
+
+interface SVGMarkerElement extends SVGElement, SVGFitToViewBox {
+    readonly markerHeight: SVGAnimatedLength;
+    readonly markerUnits: SVGAnimatedEnumeration;
+    readonly markerWidth: SVGAnimatedLength;
+    readonly orientAngle: SVGAnimatedAngle;
+    readonly orientType: SVGAnimatedEnumeration;
+    readonly refX: SVGAnimatedLength;
+    readonly refY: SVGAnimatedLength;
+    setOrientToAngle(angle: SVGAngle): void;
+    setOrientToAuto(): void;
+    readonly SVG_MARKER_ORIENT_ANGLE: number;
+    readonly SVG_MARKER_ORIENT_AUTO: number;
+    readonly SVG_MARKER_ORIENT_UNKNOWN: number;
+    readonly SVG_MARKERUNITS_STROKEWIDTH: number;
+    readonly SVG_MARKERUNITS_UNKNOWN: number;
+    readonly SVG_MARKERUNITS_USERSPACEONUSE: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGMarkerElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGMarkerElement: {
+    prototype: SVGMarkerElement;
+    new(): SVGMarkerElement;
+    readonly SVG_MARKER_ORIENT_ANGLE: number;
+    readonly SVG_MARKER_ORIENT_AUTO: number;
+    readonly SVG_MARKER_ORIENT_UNKNOWN: number;
+    readonly SVG_MARKERUNITS_STROKEWIDTH: number;
+    readonly SVG_MARKERUNITS_UNKNOWN: number;
+    readonly SVG_MARKERUNITS_USERSPACEONUSE: number;
+};
+
+interface SVGMaskElement extends SVGElement, SVGTests, SVGUnitTypes {
+    readonly height: SVGAnimatedLength;
+    readonly maskContentUnits: SVGAnimatedEnumeration;
+    readonly maskUnits: SVGAnimatedEnumeration;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGMaskElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGMaskElement: {
+    prototype: SVGMaskElement;
+    new(): SVGMaskElement;
+};
+
+interface SVGMatrix {
+    a: number;
+    b: number;
+    c: number;
+    d: number;
+    e: number;
+    f: number;
+    flipX(): SVGMatrix;
+    flipY(): SVGMatrix;
+    inverse(): SVGMatrix;
+    multiply(secondMatrix: SVGMatrix): SVGMatrix;
+    rotate(angle: number): SVGMatrix;
+    rotateFromVector(x: number, y: number): SVGMatrix;
+    scale(scaleFactor: number): SVGMatrix;
+    scaleNonUniform(scaleFactorX: number, scaleFactorY: number): SVGMatrix;
+    skewX(angle: number): SVGMatrix;
+    skewY(angle: number): SVGMatrix;
+    translate(x: number, y: number): SVGMatrix;
+}
+
+declare var SVGMatrix: {
+    prototype: SVGMatrix;
+    new(): SVGMatrix;
+};
+
+interface SVGMetadataElement extends SVGElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGMetadataElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGMetadataElement: {
+    prototype: SVGMetadataElement;
+    new(): SVGMetadataElement;
+};
+
+interface SVGNumber {
+    value: number;
+}
+
+declare var SVGNumber: {
+    prototype: SVGNumber;
+    new(): SVGNumber;
+};
+
+interface SVGNumberList {
+    readonly numberOfItems: number;
+    appendItem(newItem: SVGNumber): SVGNumber;
+    clear(): void;
+    getItem(index: number): SVGNumber;
+    initialize(newItem: SVGNumber): SVGNumber;
+    insertItemBefore(newItem: SVGNumber, index: number): SVGNumber;
+    removeItem(index: number): SVGNumber;
+    replaceItem(newItem: SVGNumber, index: number): SVGNumber;
+}
+
+declare var SVGNumberList: {
+    prototype: SVGNumberList;
+    new(): SVGNumberList;
+};
+
+interface SVGPathElement extends SVGGraphicsElement {
+    readonly pathSegList: SVGPathSegList;
+    createSVGPathSegArcAbs(x: number, y: number, r1: number, r2: number, angle: number, largeArcFlag: boolean, sweepFlag: boolean): SVGPathSegArcAbs;
+    createSVGPathSegArcRel(x: number, y: number, r1: number, r2: number, angle: number, largeArcFlag: boolean, sweepFlag: boolean): SVGPathSegArcRel;
+    createSVGPathSegClosePath(): SVGPathSegClosePath;
+    createSVGPathSegCurvetoCubicAbs(x: number, y: number, x1: number, y1: number, x2: number, y2: number): SVGPathSegCurvetoCubicAbs;
+    createSVGPathSegCurvetoCubicRel(x: number, y: number, x1: number, y1: number, x2: number, y2: number): SVGPathSegCurvetoCubicRel;
+    createSVGPathSegCurvetoCubicSmoothAbs(x: number, y: number, x2: number, y2: number): SVGPathSegCurvetoCubicSmoothAbs;
+    createSVGPathSegCurvetoCubicSmoothRel(x: number, y: number, x2: number, y2: number): SVGPathSegCurvetoCubicSmoothRel;
+    createSVGPathSegCurvetoQuadraticAbs(x: number, y: number, x1: number, y1: number): SVGPathSegCurvetoQuadraticAbs;
+    createSVGPathSegCurvetoQuadraticRel(x: number, y: number, x1: number, y1: number): SVGPathSegCurvetoQuadraticRel;
+    createSVGPathSegCurvetoQuadraticSmoothAbs(x: number, y: number): SVGPathSegCurvetoQuadraticSmoothAbs;
+    createSVGPathSegCurvetoQuadraticSmoothRel(x: number, y: number): SVGPathSegCurvetoQuadraticSmoothRel;
+    createSVGPathSegLinetoAbs(x: number, y: number): SVGPathSegLinetoAbs;
+    createSVGPathSegLinetoHorizontalAbs(x: number): SVGPathSegLinetoHorizontalAbs;
+    createSVGPathSegLinetoHorizontalRel(x: number): SVGPathSegLinetoHorizontalRel;
+    createSVGPathSegLinetoRel(x: number, y: number): SVGPathSegLinetoRel;
+    createSVGPathSegLinetoVerticalAbs(y: number): SVGPathSegLinetoVerticalAbs;
+    createSVGPathSegLinetoVerticalRel(y: number): SVGPathSegLinetoVerticalRel;
+    createSVGPathSegMovetoAbs(x: number, y: number): SVGPathSegMovetoAbs;
+    createSVGPathSegMovetoRel(x: number, y: number): SVGPathSegMovetoRel;
+    getPathSegAtLength(distance: number): number;
+    getPointAtLength(distance: number): SVGPoint;
+    getTotalLength(): number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGPathElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGPathElement: {
+    prototype: SVGPathElement;
+    new(): SVGPathElement;
+};
+
+interface SVGPathSeg {
+    readonly pathSegType: number;
+    readonly pathSegTypeAsLetter: string;
+    readonly PATHSEG_ARC_ABS: number;
+    readonly PATHSEG_ARC_REL: number;
+    readonly PATHSEG_CLOSEPATH: number;
+    readonly PATHSEG_CURVETO_CUBIC_ABS: number;
+    readonly PATHSEG_CURVETO_CUBIC_REL: number;
+    readonly PATHSEG_CURVETO_CUBIC_SMOOTH_ABS: number;
+    readonly PATHSEG_CURVETO_CUBIC_SMOOTH_REL: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_ABS: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_REL: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_SMOOTH_ABS: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_SMOOTH_REL: number;
+    readonly PATHSEG_LINETO_ABS: number;
+    readonly PATHSEG_LINETO_HORIZONTAL_ABS: number;
+    readonly PATHSEG_LINETO_HORIZONTAL_REL: number;
+    readonly PATHSEG_LINETO_REL: number;
+    readonly PATHSEG_LINETO_VERTICAL_ABS: number;
+    readonly PATHSEG_LINETO_VERTICAL_REL: number;
+    readonly PATHSEG_MOVETO_ABS: number;
+    readonly PATHSEG_MOVETO_REL: number;
+    readonly PATHSEG_UNKNOWN: number;
+}
+
+declare var SVGPathSeg: {
+    prototype: SVGPathSeg;
+    new(): SVGPathSeg;
+    readonly PATHSEG_ARC_ABS: number;
+    readonly PATHSEG_ARC_REL: number;
+    readonly PATHSEG_CLOSEPATH: number;
+    readonly PATHSEG_CURVETO_CUBIC_ABS: number;
+    readonly PATHSEG_CURVETO_CUBIC_REL: number;
+    readonly PATHSEG_CURVETO_CUBIC_SMOOTH_ABS: number;
+    readonly PATHSEG_CURVETO_CUBIC_SMOOTH_REL: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_ABS: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_REL: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_SMOOTH_ABS: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_SMOOTH_REL: number;
+    readonly PATHSEG_LINETO_ABS: number;
+    readonly PATHSEG_LINETO_HORIZONTAL_ABS: number;
+    readonly PATHSEG_LINETO_HORIZONTAL_REL: number;
+    readonly PATHSEG_LINETO_REL: number;
+    readonly PATHSEG_LINETO_VERTICAL_ABS: number;
+    readonly PATHSEG_LINETO_VERTICAL_REL: number;
+    readonly PATHSEG_MOVETO_ABS: number;
+    readonly PATHSEG_MOVETO_REL: number;
+    readonly PATHSEG_UNKNOWN: number;
+};
+
+interface SVGPathSegArcAbs extends SVGPathSeg {
+    angle: number;
+    largeArcFlag: boolean;
+    r1: number;
+    r2: number;
+    sweepFlag: boolean;
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegArcAbs: {
+    prototype: SVGPathSegArcAbs;
+    new(): SVGPathSegArcAbs;
+};
+
+interface SVGPathSegArcRel extends SVGPathSeg {
+    angle: number;
+    largeArcFlag: boolean;
+    r1: number;
+    r2: number;
+    sweepFlag: boolean;
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegArcRel: {
+    prototype: SVGPathSegArcRel;
+    new(): SVGPathSegArcRel;
+};
+
+interface SVGPathSegClosePath extends SVGPathSeg {
+}
+
+declare var SVGPathSegClosePath: {
+    prototype: SVGPathSegClosePath;
+    new(): SVGPathSegClosePath;
+};
+
+interface SVGPathSegCurvetoCubicAbs extends SVGPathSeg {
+    x: number;
+    x1: number;
+    x2: number;
+    y: number;
+    y1: number;
+    y2: number;
+}
+
+declare var SVGPathSegCurvetoCubicAbs: {
+    prototype: SVGPathSegCurvetoCubicAbs;
+    new(): SVGPathSegCurvetoCubicAbs;
+};
+
+interface SVGPathSegCurvetoCubicRel extends SVGPathSeg {
+    x: number;
+    x1: number;
+    x2: number;
+    y: number;
+    y1: number;
+    y2: number;
+}
+
+declare var SVGPathSegCurvetoCubicRel: {
+    prototype: SVGPathSegCurvetoCubicRel;
+    new(): SVGPathSegCurvetoCubicRel;
+};
+
+interface SVGPathSegCurvetoCubicSmoothAbs extends SVGPathSeg {
+    x: number;
+    x2: number;
+    y: number;
+    y2: number;
+}
+
+declare var SVGPathSegCurvetoCubicSmoothAbs: {
+    prototype: SVGPathSegCurvetoCubicSmoothAbs;
+    new(): SVGPathSegCurvetoCubicSmoothAbs;
+};
+
+interface SVGPathSegCurvetoCubicSmoothRel extends SVGPathSeg {
+    x: number;
+    x2: number;
+    y: number;
+    y2: number;
+}
+
+declare var SVGPathSegCurvetoCubicSmoothRel: {
+    prototype: SVGPathSegCurvetoCubicSmoothRel;
+    new(): SVGPathSegCurvetoCubicSmoothRel;
+};
+
+interface SVGPathSegCurvetoQuadraticAbs extends SVGPathSeg {
+    x: number;
+    x1: number;
+    y: number;
+    y1: number;
+}
+
+declare var SVGPathSegCurvetoQuadraticAbs: {
+    prototype: SVGPathSegCurvetoQuadraticAbs;
+    new(): SVGPathSegCurvetoQuadraticAbs;
+};
+
+interface SVGPathSegCurvetoQuadraticRel extends SVGPathSeg {
+    x: number;
+    x1: number;
+    y: number;
+    y1: number;
+}
+
+declare var SVGPathSegCurvetoQuadraticRel: {
+    prototype: SVGPathSegCurvetoQuadraticRel;
+    new(): SVGPathSegCurvetoQuadraticRel;
+};
+
+interface SVGPathSegCurvetoQuadraticSmoothAbs extends SVGPathSeg {
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegCurvetoQuadraticSmoothAbs: {
+    prototype: SVGPathSegCurvetoQuadraticSmoothAbs;
+    new(): SVGPathSegCurvetoQuadraticSmoothAbs;
+};
+
+interface SVGPathSegCurvetoQuadraticSmoothRel extends SVGPathSeg {
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegCurvetoQuadraticSmoothRel: {
+    prototype: SVGPathSegCurvetoQuadraticSmoothRel;
+    new(): SVGPathSegCurvetoQuadraticSmoothRel;
+};
+
+interface SVGPathSegLinetoAbs extends SVGPathSeg {
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegLinetoAbs: {
+    prototype: SVGPathSegLinetoAbs;
+    new(): SVGPathSegLinetoAbs;
+};
+
+interface SVGPathSegLinetoHorizontalAbs extends SVGPathSeg {
+    x: number;
+}
+
+declare var SVGPathSegLinetoHorizontalAbs: {
+    prototype: SVGPathSegLinetoHorizontalAbs;
+    new(): SVGPathSegLinetoHorizontalAbs;
+};
+
+interface SVGPathSegLinetoHorizontalRel extends SVGPathSeg {
+    x: number;
+}
+
+declare var SVGPathSegLinetoHorizontalRel: {
+    prototype: SVGPathSegLinetoHorizontalRel;
+    new(): SVGPathSegLinetoHorizontalRel;
+};
+
+interface SVGPathSegLinetoRel extends SVGPathSeg {
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegLinetoRel: {
+    prototype: SVGPathSegLinetoRel;
+    new(): SVGPathSegLinetoRel;
+};
+
+interface SVGPathSegLinetoVerticalAbs extends SVGPathSeg {
+    y: number;
+}
+
+declare var SVGPathSegLinetoVerticalAbs: {
+    prototype: SVGPathSegLinetoVerticalAbs;
+    new(): SVGPathSegLinetoVerticalAbs;
+};
+
+interface SVGPathSegLinetoVerticalRel extends SVGPathSeg {
+    y: number;
+}
+
+declare var SVGPathSegLinetoVerticalRel: {
+    prototype: SVGPathSegLinetoVerticalRel;
+    new(): SVGPathSegLinetoVerticalRel;
+};
+
+interface SVGPathSegList {
+    readonly numberOfItems: number;
+    appendItem(newItem: SVGPathSeg): SVGPathSeg;
+    clear(): void;
+    getItem(index: number): SVGPathSeg;
+    initialize(newItem: SVGPathSeg): SVGPathSeg;
+    insertItemBefore(newItem: SVGPathSeg, index: number): SVGPathSeg;
+    removeItem(index: number): SVGPathSeg;
+    replaceItem(newItem: SVGPathSeg, index: number): SVGPathSeg;
+}
+
+declare var SVGPathSegList: {
+    prototype: SVGPathSegList;
+    new(): SVGPathSegList;
+};
+
+interface SVGPathSegMovetoAbs extends SVGPathSeg {
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegMovetoAbs: {
+    prototype: SVGPathSegMovetoAbs;
+    new(): SVGPathSegMovetoAbs;
+};
+
+interface SVGPathSegMovetoRel extends SVGPathSeg {
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegMovetoRel: {
+    prototype: SVGPathSegMovetoRel;
+    new(): SVGPathSegMovetoRel;
+};
+
+interface SVGPatternElement extends SVGElement, SVGTests, SVGUnitTypes, SVGFitToViewBox, SVGURIReference {
+    readonly height: SVGAnimatedLength;
+    readonly patternContentUnits: SVGAnimatedEnumeration;
+    readonly patternTransform: SVGAnimatedTransformList;
+    readonly patternUnits: SVGAnimatedEnumeration;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGPatternElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGPatternElement: {
+    prototype: SVGPatternElement;
+    new(): SVGPatternElement;
+};
+
+interface SVGPoint {
+    x: number;
+    y: number;
+    matrixTransform(matrix: SVGMatrix): SVGPoint;
+}
+
+declare var SVGPoint: {
+    prototype: SVGPoint;
+    new(): SVGPoint;
+};
+
+interface SVGPointList {
+    readonly numberOfItems: number;
+    appendItem(newItem: SVGPoint): SVGPoint;
+    clear(): void;
+    getItem(index: number): SVGPoint;
+    initialize(newItem: SVGPoint): SVGPoint;
+    insertItemBefore(newItem: SVGPoint, index: number): SVGPoint;
+    removeItem(index: number): SVGPoint;
+    replaceItem(newItem: SVGPoint, index: number): SVGPoint;
+}
+
+declare var SVGPointList: {
+    prototype: SVGPointList;
+    new(): SVGPointList;
+};
+
+interface SVGPolygonElement extends SVGGraphicsElement, SVGAnimatedPoints {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGPolygonElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGPolygonElement: {
+    prototype: SVGPolygonElement;
+    new(): SVGPolygonElement;
+};
+
+interface SVGPolylineElement extends SVGGraphicsElement, SVGAnimatedPoints {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGPolylineElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGPolylineElement: {
+    prototype: SVGPolylineElement;
+    new(): SVGPolylineElement;
+};
+
+interface SVGPreserveAspectRatio {
+    align: number;
+    meetOrSlice: number;
+    readonly SVG_MEETORSLICE_MEET: number;
+    readonly SVG_MEETORSLICE_SLICE: number;
+    readonly SVG_MEETORSLICE_UNKNOWN: number;
+    readonly SVG_PRESERVEASPECTRATIO_NONE: number;
+    readonly SVG_PRESERVEASPECTRATIO_UNKNOWN: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMAXYMAX: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMAXYMID: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMAXYMIN: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMIDYMAX: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMIDYMID: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMIDYMIN: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMINYMAX: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMINYMID: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMINYMIN: number;
+}
+
+declare var SVGPreserveAspectRatio: {
+    prototype: SVGPreserveAspectRatio;
+    new(): SVGPreserveAspectRatio;
+    readonly SVG_MEETORSLICE_MEET: number;
+    readonly SVG_MEETORSLICE_SLICE: number;
+    readonly SVG_MEETORSLICE_UNKNOWN: number;
+    readonly SVG_PRESERVEASPECTRATIO_NONE: number;
+    readonly SVG_PRESERVEASPECTRATIO_UNKNOWN: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMAXYMAX: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMAXYMID: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMAXYMIN: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMIDYMAX: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMIDYMID: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMIDYMIN: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMINYMAX: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMINYMID: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMINYMIN: number;
+};
+
+interface SVGRadialGradientElement extends SVGGradientElement {
+    readonly cx: SVGAnimatedLength;
+    readonly cy: SVGAnimatedLength;
+    readonly fx: SVGAnimatedLength;
+    readonly fy: SVGAnimatedLength;
+    readonly r: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGRadialGradientElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGRadialGradientElement: {
+    prototype: SVGRadialGradientElement;
+    new(): SVGRadialGradientElement;
+};
+
+interface SVGRect {
+    height: number;
+    width: number;
+    x: number;
+    y: number;
+}
+
+declare var SVGRect: {
+    prototype: SVGRect;
+    new(): SVGRect;
+};
+
+interface SVGRectElement extends SVGGraphicsElement {
+    readonly height: SVGAnimatedLength;
+    readonly rx: SVGAnimatedLength;
+    readonly ry: SVGAnimatedLength;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGRectElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGRectElement: {
+    prototype: SVGRectElement;
+    new(): SVGRectElement;
+};
+
+interface SVGScriptElement extends SVGElement, SVGURIReference {
+    type: string;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGScriptElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGScriptElement: {
+    prototype: SVGScriptElement;
+    new(): SVGScriptElement;
+};
+
+interface SVGStopElement extends SVGElement {
+    readonly offset: SVGAnimatedNumber;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGStopElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGStopElement: {
+    prototype: SVGStopElement;
+    new(): SVGStopElement;
+};
+
+interface SVGStringList {
+    readonly numberOfItems: number;
+    appendItem(newItem: string): string;
+    clear(): void;
+    getItem(index: number): string;
+    initialize(newItem: string): string;
+    insertItemBefore(newItem: string, index: number): string;
+    removeItem(index: number): string;
+    replaceItem(newItem: string, index: number): string;
+}
+
+declare var SVGStringList: {
+    prototype: SVGStringList;
+    new(): SVGStringList;
+};
+
+interface SVGStyleElement extends SVGElement {
+    disabled: boolean;
+    media: string;
+    title: string;
+    type: string;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGStyleElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGStyleElement: {
+    prototype: SVGStyleElement;
+    new(): SVGStyleElement;
+};
+
+interface SVGSVGElementEventMap extends SVGElementEventMap {
+    "SVGAbort": Event;
+    "SVGError": Event;
+    "resize": UIEvent;
+    "scroll": UIEvent;
+    "SVGUnload": Event;
+    "SVGZoom": SVGZoomEvent;
+}
+
+interface SVGSVGElement extends SVGGraphicsElement, DocumentEvent, SVGFitToViewBox, SVGZoomAndPan {
+    contentScriptType: string;
+    contentStyleType: string;
+    currentScale: number;
+    readonly currentTranslate: SVGPoint;
+    readonly height: SVGAnimatedLength;
+    onabort: (this: SVGSVGElement, ev: Event) => any;
+    onerror: (this: SVGSVGElement, ev: Event) => any;
+    onresize: (this: SVGSVGElement, ev: UIEvent) => any;
+    onscroll: (this: SVGSVGElement, ev: UIEvent) => any;
+    onunload: (this: SVGSVGElement, ev: Event) => any;
+    onzoom: (this: SVGSVGElement, ev: SVGZoomEvent) => any;
+    readonly pixelUnitToMillimeterX: number;
+    readonly pixelUnitToMillimeterY: number;
+    readonly screenPixelToMillimeterX: number;
+    readonly screenPixelToMillimeterY: number;
+    readonly viewport: SVGRect;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+    checkEnclosure(element: SVGElement, rect: SVGRect): boolean;
+    checkIntersection(element: SVGElement, rect: SVGRect): boolean;
+    createSVGAngle(): SVGAngle;
+    createSVGLength(): SVGLength;
+    createSVGMatrix(): SVGMatrix;
+    createSVGNumber(): SVGNumber;
+    createSVGPoint(): SVGPoint;
+    createSVGRect(): SVGRect;
+    createSVGTransform(): SVGTransform;
+    createSVGTransformFromMatrix(matrix: SVGMatrix): SVGTransform;
+    deselectAll(): void;
+    forceRedraw(): void;
+    getComputedStyle(elt: Element, pseudoElt?: string): CSSStyleDeclaration;
+    getCurrentTime(): number;
+    getElementById(elementId: string): Element;
+    getEnclosureList(rect: SVGRect, referenceElement: SVGElement): NodeListOf<SVGCircleElement | SVGEllipseElement | SVGImageElement | SVGLineElement | SVGPathElement | SVGPolygonElement | SVGPolylineElement | SVGRectElement | SVGTextElement | SVGUseElement>;
+    getIntersectionList(rect: SVGRect, referenceElement: SVGElement): NodeListOf<SVGCircleElement | SVGEllipseElement | SVGImageElement | SVGLineElement | SVGPathElement | SVGPolygonElement | SVGPolylineElement | SVGRectElement | SVGTextElement | SVGUseElement>;
+    pauseAnimations(): void;
+    setCurrentTime(seconds: number): void;
+    suspendRedraw(maxWaitMilliseconds: number): number;
+    unpauseAnimations(): void;
+    unsuspendRedraw(suspendHandleID: number): void;
+    unsuspendRedrawAll(): void;
+    addEventListener<K extends keyof SVGSVGElementEventMap>(type: K, listener: (this: SVGSVGElement, ev: SVGSVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGSVGElement: {
+    prototype: SVGSVGElement;
+    new(): SVGSVGElement;
+};
+
+interface SVGSwitchElement extends SVGGraphicsElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGSwitchElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGSwitchElement: {
+    prototype: SVGSwitchElement;
+    new(): SVGSwitchElement;
+};
+
+interface SVGSymbolElement extends SVGElement, SVGFitToViewBox {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGSymbolElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGSymbolElement: {
+    prototype: SVGSymbolElement;
+    new(): SVGSymbolElement;
+};
+
+interface SVGTextContentElement extends SVGGraphicsElement {
+    readonly lengthAdjust: SVGAnimatedEnumeration;
+    readonly textLength: SVGAnimatedLength;
+    getCharNumAtPosition(point: SVGPoint): number;
+    getComputedTextLength(): number;
+    getEndPositionOfChar(charnum: number): SVGPoint;
+    getExtentOfChar(charnum: number): SVGRect;
+    getNumberOfChars(): number;
+    getRotationOfChar(charnum: number): number;
+    getStartPositionOfChar(charnum: number): SVGPoint;
+    getSubStringLength(charnum: number, nchars: number): number;
+    selectSubString(charnum: number, nchars: number): void;
+    readonly LENGTHADJUST_SPACING: number;
+    readonly LENGTHADJUST_SPACINGANDGLYPHS: number;
+    readonly LENGTHADJUST_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGTextContentElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGTextContentElement: {
+    prototype: SVGTextContentElement;
+    new(): SVGTextContentElement;
+    readonly LENGTHADJUST_SPACING: number;
+    readonly LENGTHADJUST_SPACINGANDGLYPHS: number;
+    readonly LENGTHADJUST_UNKNOWN: number;
+};
+
+interface SVGTextElement extends SVGTextPositioningElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGTextElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGTextElement: {
+    prototype: SVGTextElement;
+    new(): SVGTextElement;
+};
+
+interface SVGTextPathElement extends SVGTextContentElement, SVGURIReference {
+    readonly method: SVGAnimatedEnumeration;
+    readonly spacing: SVGAnimatedEnumeration;
+    readonly startOffset: SVGAnimatedLength;
+    readonly TEXTPATH_METHODTYPE_ALIGN: number;
+    readonly TEXTPATH_METHODTYPE_STRETCH: number;
+    readonly TEXTPATH_METHODTYPE_UNKNOWN: number;
+    readonly TEXTPATH_SPACINGTYPE_AUTO: number;
+    readonly TEXTPATH_SPACINGTYPE_EXACT: number;
+    readonly TEXTPATH_SPACINGTYPE_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGTextPathElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGTextPathElement: {
+    prototype: SVGTextPathElement;
+    new(): SVGTextPathElement;
+    readonly TEXTPATH_METHODTYPE_ALIGN: number;
+    readonly TEXTPATH_METHODTYPE_STRETCH: number;
+    readonly TEXTPATH_METHODTYPE_UNKNOWN: number;
+    readonly TEXTPATH_SPACINGTYPE_AUTO: number;
+    readonly TEXTPATH_SPACINGTYPE_EXACT: number;
+    readonly TEXTPATH_SPACINGTYPE_UNKNOWN: number;
+};
+
+interface SVGTextPositioningElement extends SVGTextContentElement {
+    readonly dx: SVGAnimatedLengthList;
+    readonly dy: SVGAnimatedLengthList;
+    readonly rotate: SVGAnimatedNumberList;
+    readonly x: SVGAnimatedLengthList;
+    readonly y: SVGAnimatedLengthList;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGTextPositioningElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGTextPositioningElement: {
+    prototype: SVGTextPositioningElement;
+    new(): SVGTextPositioningElement;
+};
+
+interface SVGTitleElement extends SVGElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGTitleElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGTitleElement: {
+    prototype: SVGTitleElement;
+    new(): SVGTitleElement;
+};
+
+interface SVGTransform {
+    readonly angle: number;
+    readonly matrix: SVGMatrix;
+    readonly type: number;
+    setMatrix(matrix: SVGMatrix): void;
+    setRotate(angle: number, cx: number, cy: number): void;
+    setScale(sx: number, sy: number): void;
+    setSkewX(angle: number): void;
+    setSkewY(angle: number): void;
+    setTranslate(tx: number, ty: number): void;
+    readonly SVG_TRANSFORM_MATRIX: number;
+    readonly SVG_TRANSFORM_ROTATE: number;
+    readonly SVG_TRANSFORM_SCALE: number;
+    readonly SVG_TRANSFORM_SKEWX: number;
+    readonly SVG_TRANSFORM_SKEWY: number;
+    readonly SVG_TRANSFORM_TRANSLATE: number;
+    readonly SVG_TRANSFORM_UNKNOWN: number;
+}
+
+declare var SVGTransform: {
+    prototype: SVGTransform;
+    new(): SVGTransform;
+    readonly SVG_TRANSFORM_MATRIX: number;
+    readonly SVG_TRANSFORM_ROTATE: number;
+    readonly SVG_TRANSFORM_SCALE: number;
+    readonly SVG_TRANSFORM_SKEWX: number;
+    readonly SVG_TRANSFORM_SKEWY: number;
+    readonly SVG_TRANSFORM_TRANSLATE: number;
+    readonly SVG_TRANSFORM_UNKNOWN: number;
+};
+
+interface SVGTransformList {
+    readonly numberOfItems: number;
+    appendItem(newItem: SVGTransform): SVGTransform;
+    clear(): void;
+    consolidate(): SVGTransform;
+    createSVGTransformFromMatrix(matrix: SVGMatrix): SVGTransform;
+    getItem(index: number): SVGTransform;
+    initialize(newItem: SVGTransform): SVGTransform;
+    insertItemBefore(newItem: SVGTransform, index: number): SVGTransform;
+    removeItem(index: number): SVGTransform;
+    replaceItem(newItem: SVGTransform, index: number): SVGTransform;
+}
+
+declare var SVGTransformList: {
+    prototype: SVGTransformList;
+    new(): SVGTransformList;
+};
+
+interface SVGTSpanElement extends SVGTextPositioningElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGTSpanElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGTSpanElement: {
+    prototype: SVGTSpanElement;
+    new(): SVGTSpanElement;
+};
+
+interface SVGUnitTypes {
+    readonly SVG_UNIT_TYPE_OBJECTBOUNDINGBOX: number;
+    readonly SVG_UNIT_TYPE_UNKNOWN: number;
+    readonly SVG_UNIT_TYPE_USERSPACEONUSE: number;
+}
+declare var SVGUnitTypes: SVGUnitTypes;
+
+interface SVGUseElement extends SVGGraphicsElement, SVGURIReference {
+    readonly animatedInstanceRoot: SVGElementInstance;
+    readonly height: SVGAnimatedLength;
+    readonly instanceRoot: SVGElementInstance;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGUseElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGUseElement: {
+    prototype: SVGUseElement;
+    new(): SVGUseElement;
+};
+
+interface SVGViewElement extends SVGElement, SVGZoomAndPan, SVGFitToViewBox {
+    readonly viewTarget: SVGStringList;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGViewElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGViewElement: {
+    prototype: SVGViewElement;
+    new(): SVGViewElement;
+};
+
+interface SVGZoomAndPan {
+    readonly zoomAndPan: number;
+}
+
+declare var SVGZoomAndPan: {
+    readonly SVG_ZOOMANDPAN_DISABLE: number;
+    readonly SVG_ZOOMANDPAN_MAGNIFY: number;
+    readonly SVG_ZOOMANDPAN_UNKNOWN: number;
+};
+
+interface SVGZoomEvent extends UIEvent {
+    readonly newScale: number;
+    readonly newTranslate: SVGPoint;
+    readonly previousScale: number;
+    readonly previousTranslate: SVGPoint;
+    readonly zoomRectScreen: SVGRect;
+}
+
+declare var SVGZoomEvent: {
+    prototype: SVGZoomEvent;
+    new(): SVGZoomEvent;
+};
+
+interface SyncManager {
+    getTags(): any;
+    register(tag: string): Promise<void>;
+}
+
+declare var SyncManager: {
+    prototype: SyncManager;
+    new(): SyncManager;
+};
+
+interface Text extends CharacterData {
+    readonly wholeText: string;
+    readonly assignedSlot: HTMLSlotElement | null;
+    splitText(offset: number): Text;
+}
+
+declare var Text: {
+    prototype: Text;
+    new(data?: string): Text;
+};
+
+interface TextEvent extends UIEvent {
+    readonly data: string;
+    readonly inputMethod: number;
+    readonly locale: string;
+    initTextEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, dataArg: string, inputMethod: number, locale: string): void;
+    readonly DOM_INPUT_METHOD_DROP: number;
+    readonly DOM_INPUT_METHOD_HANDWRITING: number;
+    readonly DOM_INPUT_METHOD_IME: number;
+    readonly DOM_INPUT_METHOD_KEYBOARD: number;
+    readonly DOM_INPUT_METHOD_MULTIMODAL: number;
+    readonly DOM_INPUT_METHOD_OPTION: number;
+    readonly DOM_INPUT_METHOD_PASTE: number;
+    readonly DOM_INPUT_METHOD_SCRIPT: number;
+    readonly DOM_INPUT_METHOD_UNKNOWN: number;
+    readonly DOM_INPUT_METHOD_VOICE: number;
+}
+
+declare var TextEvent: {
+    prototype: TextEvent;
+    new(): TextEvent;
+    readonly DOM_INPUT_METHOD_DROP: number;
+    readonly DOM_INPUT_METHOD_HANDWRITING: number;
+    readonly DOM_INPUT_METHOD_IME: number;
+    readonly DOM_INPUT_METHOD_KEYBOARD: number;
+    readonly DOM_INPUT_METHOD_MULTIMODAL: number;
+    readonly DOM_INPUT_METHOD_OPTION: number;
+    readonly DOM_INPUT_METHOD_PASTE: number;
+    readonly DOM_INPUT_METHOD_SCRIPT: number;
+    readonly DOM_INPUT_METHOD_UNKNOWN: number;
+    readonly DOM_INPUT_METHOD_VOICE: number;
+};
+
+interface TextMetrics {
+    readonly width: number;
+}
+
+declare var TextMetrics: {
+    prototype: TextMetrics;
+    new(): TextMetrics;
+};
+
+interface TextTrackEventMap {
+    "cuechange": Event;
+    "error": Event;
+    "load": Event;
+}
+
+interface TextTrack extends EventTarget {
+    readonly activeCues: TextTrackCueList;
+    readonly cues: TextTrackCueList;
+    readonly inBandMetadataTrackDispatchType: string;
+    readonly kind: string;
+    readonly label: string;
+    readonly language: string;
+    mode: any;
+    oncuechange: (this: TextTrack, ev: Event) => any;
+    onerror: (this: TextTrack, ev: Event) => any;
+    onload: (this: TextTrack, ev: Event) => any;
+    readonly readyState: number;
+    addCue(cue: TextTrackCue): void;
+    removeCue(cue: TextTrackCue): void;
+    readonly DISABLED: number;
+    readonly ERROR: number;
+    readonly HIDDEN: number;
+    readonly LOADED: number;
+    readonly LOADING: number;
+    readonly NONE: number;
+    readonly SHOWING: number;
+    addEventListener<K extends keyof TextTrackEventMap>(type: K, listener: (this: TextTrack, ev: TextTrackEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var TextTrack: {
+    prototype: TextTrack;
+    new(): TextTrack;
+    readonly DISABLED: number;
+    readonly ERROR: number;
+    readonly HIDDEN: number;
+    readonly LOADED: number;
+    readonly LOADING: number;
+    readonly NONE: number;
+    readonly SHOWING: number;
+};
+
+interface TextTrackCueEventMap {
+    "enter": Event;
+    "exit": Event;
+}
+
+interface TextTrackCue extends EventTarget {
+    endTime: number;
+    id: string;
+    onenter: (this: TextTrackCue, ev: Event) => any;
+    onexit: (this: TextTrackCue, ev: Event) => any;
+    pauseOnExit: boolean;
+    startTime: number;
+    text: string;
+    readonly track: TextTrack;
+    getCueAsHTML(): DocumentFragment;
+    addEventListener<K extends keyof TextTrackCueEventMap>(type: K, listener: (this: TextTrackCue, ev: TextTrackCueEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var TextTrackCue: {
+    prototype: TextTrackCue;
+    new(startTime: number, endTime: number, text: string): TextTrackCue;
+};
+
+interface TextTrackCueList {
+    readonly length: number;
+    getCueById(id: string): TextTrackCue;
+    item(index: number): TextTrackCue;
+    [index: number]: TextTrackCue;
+}
+
+declare var TextTrackCueList: {
+    prototype: TextTrackCueList;
+    new(): TextTrackCueList;
+};
+
+interface TextTrackListEventMap {
+    "addtrack": TrackEvent;
+}
+
+interface TextTrackList extends EventTarget {
+    readonly length: number;
+    onaddtrack: ((this: TextTrackList, ev: TrackEvent) => any) | null;
+    item(index: number): TextTrack;
+    addEventListener<K extends keyof TextTrackListEventMap>(type: K, listener: (this: TextTrackList, ev: TextTrackListEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+    [index: number]: TextTrack;
+}
+
+declare var TextTrackList: {
+    prototype: TextTrackList;
+    new(): TextTrackList;
+};
+
+interface TimeRanges {
+    readonly length: number;
+    end(index: number): number;
+    start(index: number): number;
+}
+
+declare var TimeRanges: {
+    prototype: TimeRanges;
+    new(): TimeRanges;
+};
+
+interface Touch {
+    readonly clientX: number;
+    readonly clientY: number;
+    readonly identifier: number;
+    readonly pageX: number;
+    readonly pageY: number;
+    readonly screenX: number;
+    readonly screenY: number;
+    readonly target: EventTarget;
+}
+
+declare var Touch: {
+    prototype: Touch;
+    new(): Touch;
+};
+
+interface TouchEvent extends UIEvent {
+    readonly altKey: boolean;
+    readonly changedTouches: TouchList;
+    readonly charCode: number;
+    readonly ctrlKey: boolean;
+    readonly keyCode: number;
+    readonly metaKey: boolean;
+    readonly shiftKey: boolean;
+    readonly targetTouches: TouchList;
+    readonly touches: TouchList;
+    readonly which: number;
+}
+
+declare var TouchEvent: {
+    prototype: TouchEvent;
+    new(type: string, touchEventInit?: TouchEventInit): TouchEvent;
+};
+
+interface TouchList {
+    readonly length: number;
+    item(index: number): Touch | null;
+    [index: number]: Touch;
+}
+
+declare var TouchList: {
+    prototype: TouchList;
+    new(): TouchList;
+};
+
+interface TrackEvent extends Event {
+    readonly track: VideoTrack | AudioTrack | TextTrack | null;
+}
+
+declare var TrackEvent: {
+    prototype: TrackEvent;
+    new(typeArg: string, eventInitDict?: TrackEventInit): TrackEvent;
+};
+
+interface TransitionEvent extends Event {
+    readonly elapsedTime: number;
+    readonly propertyName: string;
+    initTransitionEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, propertyNameArg: string, elapsedTimeArg: number): void;
+}
+
+declare var TransitionEvent: {
+    prototype: TransitionEvent;
+    new(typeArg: string, eventInitDict?: TransitionEventInit): TransitionEvent;
+};
+
+interface TreeWalker {
+    currentNode: Node;
+    readonly expandEntityReferences: boolean;
+    readonly filter: NodeFilter;
+    readonly root: Node;
+    readonly whatToShow: number;
+    firstChild(): Node;
+    lastChild(): Node;
+    nextNode(): Node;
+    nextSibling(): Node;
+    parentNode(): Node;
+    previousNode(): Node;
+    previousSibling(): Node;
+}
+
+declare var TreeWalker: {
+    prototype: TreeWalker;
+    new(): TreeWalker;
+};
+
+interface UIEvent extends Event {
+    readonly detail: number;
+    readonly view: Window;
+    initUIEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number): void;
+}
+
+declare var UIEvent: {
+    prototype: UIEvent;
+    new(typeArg: string, eventInitDict?: UIEventInit): UIEvent;
+};
+
+interface UnviewableContentIdentifiedEvent extends NavigationEventWithReferrer {
+    readonly mediaType: string;
+}
+
+declare var UnviewableContentIdentifiedEvent: {
+    prototype: UnviewableContentIdentifiedEvent;
+    new(): UnviewableContentIdentifiedEvent;
+};
+
+interface URL {
+    hash: string;
+    host: string;
+    hostname: string;
+    href: string;
+    readonly origin: string;
+    password: string;
+    pathname: string;
+    port: string;
+    protocol: string;
+    search: string;
+    username: string;
+    readonly searchParams: URLSearchParams;
+    toString(): string;
+}
+
+declare var URL: {
+    prototype: URL;
+    new(url: string, base?: string): URL;
+    createObjectURL(object: any, options?: ObjectURLOptions): string;
+    revokeObjectURL(url: string): void;
+};
+
+interface ValidityState {
+    readonly badInput: boolean;
+    readonly customError: boolean;
+    readonly patternMismatch: boolean;
+    readonly rangeOverflow: boolean;
+    readonly rangeUnderflow: boolean;
+    readonly stepMismatch: boolean;
+    readonly tooLong: boolean;
+    readonly typeMismatch: boolean;
+    readonly valid: boolean;
+    readonly valueMissing: boolean;
+}
+
+declare var ValidityState: {
+    prototype: ValidityState;
+    new(): ValidityState;
+};
+
+interface VideoPlaybackQuality {
+    readonly corruptedVideoFrames: number;
+    readonly creationTime: number;
+    readonly droppedVideoFrames: number;
+    readonly totalFrameDelay: number;
+    readonly totalVideoFrames: number;
+}
+
+declare var VideoPlaybackQuality: {
+    prototype: VideoPlaybackQuality;
+    new(): VideoPlaybackQuality;
+};
+
+interface VideoTrack {
+    readonly id: string;
+    kind: string;
+    readonly label: string;
+    language: string;
+    selected: boolean;
+    readonly sourceBuffer: SourceBuffer;
+}
+
+declare var VideoTrack: {
+    prototype: VideoTrack;
+    new(): VideoTrack;
+};
+
+interface VideoTrackListEventMap {
+    "addtrack": TrackEvent;
+    "change": Event;
+    "removetrack": TrackEvent;
+}
+
+interface VideoTrackList extends EventTarget {
+    readonly length: number;
+    onaddtrack: (this: VideoTrackList, ev: TrackEvent) => any;
+    onchange: (this: VideoTrackList, ev: Event) => any;
+    onremovetrack: (this: VideoTrackList, ev: TrackEvent) => any;
+    readonly selectedIndex: number;
+    getTrackById(id: string): VideoTrack | null;
+    item(index: number): VideoTrack;
+    addEventListener<K extends keyof VideoTrackListEventMap>(type: K, listener: (this: VideoTrackList, ev: VideoTrackListEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+    [index: number]: VideoTrack;
+}
+
+declare var VideoTrackList: {
+    prototype: VideoTrackList;
+    new(): VideoTrackList;
+};
+
+interface WaveShaperNode extends AudioNode {
+    curve: Float32Array | null;
+    oversample: OverSampleType;
+}
+
+declare var WaveShaperNode: {
+    prototype: WaveShaperNode;
+    new(): WaveShaperNode;
+};
+
+interface WebAuthentication {
+    getAssertion(assertionChallenge: any, options?: AssertionOptions): Promise<WebAuthnAssertion>;
+    makeCredential(accountInformation: Account, cryptoParameters: ScopedCredentialParameters[], attestationChallenge: any, options?: ScopedCredentialOptions): Promise<ScopedCredentialInfo>;
+}
+
+declare var WebAuthentication: {
+    prototype: WebAuthentication;
+    new(): WebAuthentication;
+};
+
+interface WebAuthnAssertion {
+    readonly authenticatorData: ArrayBuffer;
+    readonly clientData: ArrayBuffer;
+    readonly credential: ScopedCredential;
+    readonly signature: ArrayBuffer;
+}
+
+declare var WebAuthnAssertion: {
+    prototype: WebAuthnAssertion;
+    new(): WebAuthnAssertion;
+};
+
+interface WEBGL_compressed_texture_s3tc {
+    readonly COMPRESSED_RGB_S3TC_DXT1_EXT: number;
+    readonly COMPRESSED_RGBA_S3TC_DXT1_EXT: number;
+    readonly COMPRESSED_RGBA_S3TC_DXT3_EXT: number;
+    readonly COMPRESSED_RGBA_S3TC_DXT5_EXT: number;
+}
+
+declare var WEBGL_compressed_texture_s3tc: {
+    prototype: WEBGL_compressed_texture_s3tc;
+    new(): WEBGL_compressed_texture_s3tc;
+    readonly COMPRESSED_RGB_S3TC_DXT1_EXT: number;
+    readonly COMPRESSED_RGBA_S3TC_DXT1_EXT: number;
+    readonly COMPRESSED_RGBA_S3TC_DXT3_EXT: number;
+    readonly COMPRESSED_RGBA_S3TC_DXT5_EXT: number;
+};
+
+interface WEBGL_debug_renderer_info {
+    readonly UNMASKED_RENDERER_WEBGL: number;
+    readonly UNMASKED_VENDOR_WEBGL: number;
+}
+
+declare var WEBGL_debug_renderer_info: {
+    prototype: WEBGL_debug_renderer_info;
+    new(): WEBGL_debug_renderer_info;
+    readonly UNMASKED_RENDERER_WEBGL: number;
+    readonly UNMASKED_VENDOR_WEBGL: number;
+};
+
+interface WEBGL_depth_texture {
+    readonly UNSIGNED_INT_24_8_WEBGL: number;
+}
+
+declare var WEBGL_depth_texture: {
+    prototype: WEBGL_depth_texture;
+    new(): WEBGL_depth_texture;
+    readonly UNSIGNED_INT_24_8_WEBGL: number;
+};
+
+interface WebGLActiveInfo {
+    readonly name: string;
+    readonly size: number;
+    readonly type: number;
+}
+
+declare var WebGLActiveInfo: {
+    prototype: WebGLActiveInfo;
+    new(): WebGLActiveInfo;
+};
+
+interface WebGLBuffer extends WebGLObject {
+}
+
+declare var WebGLBuffer: {
+    prototype: WebGLBuffer;
+    new(): WebGLBuffer;
+};
+
+interface WebGLContextEvent extends Event {
+    readonly statusMessage: string;
+}
+
+declare var WebGLContextEvent: {
+    prototype: WebGLContextEvent;
+    new(typeArg: string, eventInitDict?: WebGLContextEventInit): WebGLContextEvent;
+};
+
+interface WebGLFramebuffer extends WebGLObject {
+}
+
+declare var WebGLFramebuffer: {
+    prototype: WebGLFramebuffer;
+    new(): WebGLFramebuffer;
+};
+
+interface WebGLObject {
+}
+
+declare var WebGLObject: {
+    prototype: WebGLObject;
+    new(): WebGLObject;
+};
+
+interface WebGLProgram extends WebGLObject {
+}
+
+declare var WebGLProgram: {
+    prototype: WebGLProgram;
+    new(): WebGLProgram;
+};
+
+interface WebGLRenderbuffer extends WebGLObject {
+}
+
+declare var WebGLRenderbuffer: {
+    prototype: WebGLRenderbuffer;
+    new(): WebGLRenderbuffer;
+};
+
+interface WebGLRenderingContext {
+    readonly canvas: HTMLCanvasElement;
+    readonly drawingBufferHeight: number;
+    readonly drawingBufferWidth: number;
+    activeTexture(texture: number): void;
+    attachShader(program: WebGLProgram | null, shader: WebGLShader | null): void;
+    bindAttribLocation(program: WebGLProgram | null, index: number, name: string): void;
+    bindBuffer(target: number, buffer: WebGLBuffer | null): void;
+    bindFramebuffer(target: number, framebuffer: WebGLFramebuffer | null): void;
+    bindRenderbuffer(target: number, renderbuffer: WebGLRenderbuffer | null): void;
+    bindTexture(target: number, texture: WebGLTexture | null): void;
+    blendColor(red: number, green: number, blue: number, alpha: number): void;
+    blendEquation(mode: number): void;
+    blendEquationSeparate(modeRGB: number, modeAlpha: number): void;
+    blendFunc(sfactor: number, dfactor: number): void;
+    blendFuncSeparate(srcRGB: number, dstRGB: number, srcAlpha: number, dstAlpha: number): void;
+    bufferData(target: number, size: number | ArrayBufferView | ArrayBuffer, usage: number): void;
+    bufferSubData(target: number, offset: number, data: ArrayBufferView | ArrayBuffer): void;
+    checkFramebufferStatus(target: number): number;
+    clear(mask: number): void;
+    clearColor(red: number, green: number, blue: number, alpha: number): void;
+    clearDepth(depth: number): void;
+    clearStencil(s: number): void;
+    colorMask(red: boolean, green: boolean, blue: boolean, alpha: boolean): void;
+    compileShader(shader: WebGLShader | null): void;
+    compressedTexImage2D(target: number, level: number, internalformat: number, width: number, height: number, border: number, data: ArrayBufferView): void;
+    compressedTexSubImage2D(target: number, level: number, xoffset: number, yoffset: number, width: number, height: number, format: number, data: ArrayBufferView): void;
+    copyTexImage2D(target: number, level: number, internalformat: number, x: number, y: number, width: number, height: number, border: number): void;
+    copyTexSubImage2D(target: number, level: number, xoffset: number, yoffset: number, x: number, y: number, width: number, height: number): void;
+    createBuffer(): WebGLBuffer | null;
+    createFramebuffer(): WebGLFramebuffer | null;
+    createProgram(): WebGLProgram | null;
+    createRenderbuffer(): WebGLRenderbuffer | null;
+    createShader(type: number): WebGLShader | null;
+    createTexture(): WebGLTexture | null;
+    cullFace(mode: number): void;
+    deleteBuffer(buffer: WebGLBuffer | null): void;
+    deleteFramebuffer(framebuffer: WebGLFramebuffer | null): void;
+    deleteProgram(program: WebGLProgram | null): void;
+    deleteRenderbuffer(renderbuffer: WebGLRenderbuffer | null): void;
+    deleteShader(shader: WebGLShader | null): void;
+    deleteTexture(texture: WebGLTexture | null): void;
+    depthFunc(func: number): void;
+    depthMask(flag: boolean): void;
+    depthRange(zNear: number, zFar: number): void;
+    detachShader(program: WebGLProgram | null, shader: WebGLShader | null): void;
+    disable(cap: number): void;
+    disableVertexAttribArray(index: number): void;
+    drawArrays(mode: number, first: number, count: number): void;
+    drawElements(mode: number, count: number, type: number, offset: number): void;
+    enable(cap: number): void;
+    enableVertexAttribArray(index: number): void;
+    finish(): void;
+    flush(): void;
+    framebufferRenderbuffer(target: number, attachment: number, renderbuffertarget: number, renderbuffer: WebGLRenderbuffer | null): void;
+    framebufferTexture2D(target: number, attachment: number, textarget: number, texture: WebGLTexture | null, level: number): void;
+    frontFace(mode: number): void;
+    generateMipmap(target: number): void;
+    getActiveAttrib(program: WebGLProgram | null, index: number): WebGLActiveInfo | null;
+    getActiveUniform(program: WebGLProgram | null, index: number): WebGLActiveInfo | null;
+    getAttachedShaders(program: WebGLProgram | null): WebGLShader[] | null;
+    getAttribLocation(program: WebGLProgram | null, name: string): number;
+    getBufferParameter(target: number, pname: number): any;
+    getContextAttributes(): WebGLContextAttributes;
+    getError(): number;
+    getExtension(name: string): any;
+    getFramebufferAttachmentParameter(target: number, attachment: number, pname: number): any;
+    getParameter(pname: number): any;
+    getProgramInfoLog(program: WebGLProgram | null): string | null;
+    getProgramParameter(program: WebGLProgram | null, pname: number): any;
+    getRenderbufferParameter(target: number, pname: number): any;
+    getShaderInfoLog(shader: WebGLShader | null): string | null;
+    getShaderParameter(shader: WebGLShader | null, pname: number): any;
+    getShaderPrecisionFormat(shadertype: number, precisiontype: number): WebGLShaderPrecisionFormat | null;
+    getShaderSource(shader: WebGLShader | null): string | null;
+    getSupportedExtensions(): string[] | null;
+    getTexParameter(target: number, pname: number): any;
+    getUniform(program: WebGLProgram | null, location: WebGLUniformLocation | null): any;
+    getUniformLocation(program: WebGLProgram | null, name: string): WebGLUniformLocation | null;
+    getVertexAttrib(index: number, pname: number): any;
+    getVertexAttribOffset(index: number, pname: number): number;
+    hint(target: number, mode: number): void;
+    isBuffer(buffer: WebGLBuffer | null): boolean;
+    isContextLost(): boolean;
+    isEnabled(cap: number): boolean;
+    isFramebuffer(framebuffer: WebGLFramebuffer | null): boolean;
+    isProgram(program: WebGLProgram | null): boolean;
+    isRenderbuffer(renderbuffer: WebGLRenderbuffer | null): boolean;
+    isShader(shader: WebGLShader | null): boolean;
+    isTexture(texture: WebGLTexture | null): boolean;
+    lineWidth(width: number): void;
+    linkProgram(program: WebGLProgram | null): void;
+    pixelStorei(pname: number, param: number | boolean): void;
+    polygonOffset(factor: number, units: number): void;
+    readPixels(x: number, y: number, width: number, height: number, format: number, type: number, pixels: ArrayBufferView | null): void;
+    renderbufferStorage(target: number, internalformat: number, width: number, height: number): void;
+    sampleCoverage(value: number, invert: boolean): void;
+    scissor(x: number, y: number, width: number, height: number): void;
+    shaderSource(shader: WebGLShader | null, source: string): void;
+    stencilFunc(func: number, ref: number, mask: number): void;
+    stencilFuncSeparate(face: number, func: number, ref: number, mask: number): void;
+    stencilMask(mask: number): void;
+    stencilMaskSeparate(face: number, mask: number): void;
+    stencilOp(fail: number, zfail: number, zpass: number): void;
+    stencilOpSeparate(face: number, fail: number, zfail: number, zpass: number): void;
+    texImage2D(target: number, level: number, internalformat: number, width: number, height: number, border: number, format: number, type: number, pixels: ArrayBufferView | null): void;
+    texImage2D(target: number, level: number, internalformat: number, format: number, type: number, pixels: ImageBitmap | ImageData | HTMLVideoElement | HTMLImageElement | HTMLCanvasElement): void;
+    texParameterf(target: number, pname: number, param: number): void;
+    texParameteri(target: number, pname: number, param: number): void;
+    texSubImage2D(target: number, level: number, xoffset: number, yoffset: number, width: number, height: number, format: number, type: number, pixels: ArrayBufferView | null): void;
+    texSubImage2D(target: number, level: number, xoffset: number, yoffset: number, format: number, type: number, pixels: ImageBitmap | ImageData | HTMLVideoElement | HTMLImageElement | HTMLCanvasElement): void;
+    uniform1f(location: WebGLUniformLocation | null, x: number): void;
+    uniform1fv(location: WebGLUniformLocation, v: Float32Array | number[]): void;
+    uniform1i(location: WebGLUniformLocation | null, x: number): void;
+    uniform1iv(location: WebGLUniformLocation, v: Int32Array | number[]): void;
+    uniform2f(location: WebGLUniformLocation | null, x: number, y: number): void;
+    uniform2fv(location: WebGLUniformLocation, v: Float32Array | number[]): void;
+    uniform2i(location: WebGLUniformLocation | null, x: number, y: number): void;
+    uniform2iv(location: WebGLUniformLocation, v: Int32Array | number[]): void;
+    uniform3f(location: WebGLUniformLocation | null, x: number, y: number, z: number): void;
+    uniform3fv(location: WebGLUniformLocation, v: Float32Array | number[]): void;
+    uniform3i(location: WebGLUniformLocation | null, x: number, y: number, z: number): void;
+    uniform3iv(location: WebGLUniformLocation, v: Int32Array | number[]): void;
+    uniform4f(location: WebGLUniformLocation | null, x: number, y: number, z: number, w: number): void;
+    uniform4fv(location: WebGLUniformLocation, v: Float32Array | number[]): void;
+    uniform4i(location: WebGLUniformLocation | null, x: number, y: number, z: number, w: number): void;
+    uniform4iv(location: WebGLUniformLocation, v: Int32Array | number[]): void;
+    uniformMatrix2fv(location: WebGLUniformLocation, transpose: boolean, value: Float32Array | number[]): void;
+    uniformMatrix3fv(location: WebGLUniformLocation, transpose: boolean, value: Float32Array | number[]): void;
+    uniformMatrix4fv(location: WebGLUniformLocation, transpose: boolean, value: Float32Array | number[]): void;
+    useProgram(program: WebGLProgram | null): void;
+    validateProgram(program: WebGLProgram | null): void;
+    vertexAttrib1f(indx: number, x: number): void;
+    vertexAttrib1fv(indx: number, values: Float32Array | number[]): void;
+    vertexAttrib2f(indx: number, x: number, y: number): void;
+    vertexAttrib2fv(indx: number, values: Float32Array | number[]): void;
+    vertexAttrib3f(indx: number, x: number, y: number, z: number): void;
+    vertexAttrib3fv(indx: number, values: Float32Array | number[]): void;
+    vertexAttrib4f(indx: number, x: number, y: number, z: number, w: number): void;
+    vertexAttrib4fv(indx: number, values: Float32Array | number[]): void;
+    vertexAttribPointer(indx: number, size: number, type: number, normalized: boolean, stride: number, offset: number): void;
+    viewport(x: number, y: number, width: number, height: number): void;
+    readonly ACTIVE_ATTRIBUTES: number;
+    readonly ACTIVE_TEXTURE: number;
+    readonly ACTIVE_UNIFORMS: number;
+    readonly ALIASED_LINE_WIDTH_RANGE: number;
+    readonly ALIASED_POINT_SIZE_RANGE: number;
+    readonly ALPHA: number;
+    readonly ALPHA_BITS: number;
+    readonly ALWAYS: number;
+    readonly ARRAY_BUFFER: number;
+    readonly ARRAY_BUFFER_BINDING: number;
+    readonly ATTACHED_SHADERS: number;
+    readonly BACK: number;
+    readonly BLEND: number;
+    readonly BLEND_COLOR: number;
+    readonly BLEND_DST_ALPHA: number;
+    readonly BLEND_DST_RGB: number;
+    readonly BLEND_EQUATION: number;
+    readonly BLEND_EQUATION_ALPHA: number;
+    readonly BLEND_EQUATION_RGB: number;
+    readonly BLEND_SRC_ALPHA: number;
+    readonly BLEND_SRC_RGB: number;
+    readonly BLUE_BITS: number;
+    readonly BOOL: number;
+    readonly BOOL_VEC2: number;
+    readonly BOOL_VEC3: number;
+    readonly BOOL_VEC4: number;
+    readonly BROWSER_DEFAULT_WEBGL: number;
+    readonly BUFFER_SIZE: number;
+    readonly BUFFER_USAGE: number;
+    readonly BYTE: number;
+    readonly CCW: number;
+    readonly CLAMP_TO_EDGE: number;
+    readonly COLOR_ATTACHMENT0: number;
+    readonly COLOR_BUFFER_BIT: number;
+    readonly COLOR_CLEAR_VALUE: number;
+    readonly COLOR_WRITEMASK: number;
+    readonly COMPILE_STATUS: number;
+    readonly COMPRESSED_TEXTURE_FORMATS: number;
+    readonly CONSTANT_ALPHA: number;
+    readonly CONSTANT_COLOR: number;
+    readonly CONTEXT_LOST_WEBGL: number;
+    readonly CULL_FACE: number;
+    readonly CULL_FACE_MODE: number;
+    readonly CURRENT_PROGRAM: number;
+    readonly CURRENT_VERTEX_ATTRIB: number;
+    readonly CW: number;
+    readonly DECR: number;
+    readonly DECR_WRAP: number;
+    readonly DELETE_STATUS: number;
+    readonly DEPTH_ATTACHMENT: number;
+    readonly DEPTH_BITS: number;
+    readonly DEPTH_BUFFER_BIT: number;
+    readonly DEPTH_CLEAR_VALUE: number;
+    readonly DEPTH_COMPONENT: number;
+    readonly DEPTH_COMPONENT16: number;
+    readonly DEPTH_FUNC: number;
+    readonly DEPTH_RANGE: number;
+    readonly DEPTH_STENCIL: number;
+    readonly DEPTH_STENCIL_ATTACHMENT: number;
+    readonly DEPTH_TEST: number;
+    readonly DEPTH_WRITEMASK: number;
+    readonly DITHER: number;
+    readonly DONT_CARE: number;
+    readonly DST_ALPHA: number;
+    readonly DST_COLOR: number;
+    readonly DYNAMIC_DRAW: number;
+    readonly ELEMENT_ARRAY_BUFFER: number;
+    readonly ELEMENT_ARRAY_BUFFER_BINDING: number;
+    readonly EQUAL: number;
+    readonly FASTEST: number;
+    readonly FLOAT: number;
+    readonly FLOAT_MAT2: number;
+    readonly FLOAT_MAT3: number;
+    readonly FLOAT_MAT4: number;
+    readonly FLOAT_VEC2: number;
+    readonly FLOAT_VEC3: number;
+    readonly FLOAT_VEC4: number;
+    readonly FRAGMENT_SHADER: number;
+    readonly FRAMEBUFFER: number;
+    readonly FRAMEBUFFER_ATTACHMENT_OBJECT_NAME: number;
+    readonly FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE: number;
+    readonly FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE: number;
+    readonly FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL: number;
+    readonly FRAMEBUFFER_BINDING: number;
+    readonly FRAMEBUFFER_COMPLETE: number;
+    readonly FRAMEBUFFER_INCOMPLETE_ATTACHMENT: number;
+    readonly FRAMEBUFFER_INCOMPLETE_DIMENSIONS: number;
+    readonly FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT: number;
+    readonly FRAMEBUFFER_UNSUPPORTED: number;
+    readonly FRONT: number;
+    readonly FRONT_AND_BACK: number;
+    readonly FRONT_FACE: number;
+    readonly FUNC_ADD: number;
+    readonly FUNC_REVERSE_SUBTRACT: number;
+    readonly FUNC_SUBTRACT: number;
+    readonly GENERATE_MIPMAP_HINT: number;
+    readonly GEQUAL: number;
+    readonly GREATER: number;
+    readonly GREEN_BITS: number;
+    readonly HIGH_FLOAT: number;
+    readonly HIGH_INT: number;
+    readonly IMPLEMENTATION_COLOR_READ_FORMAT: number;
+    readonly IMPLEMENTATION_COLOR_READ_TYPE: number;
+    readonly INCR: number;
+    readonly INCR_WRAP: number;
+    readonly INT: number;
+    readonly INT_VEC2: number;
+    readonly INT_VEC3: number;
+    readonly INT_VEC4: number;
+    readonly INVALID_ENUM: number;
+    readonly INVALID_FRAMEBUFFER_OPERATION: number;
+    readonly INVALID_OPERATION: number;
+    readonly INVALID_VALUE: number;
+    readonly INVERT: number;
+    readonly KEEP: number;
+    readonly LEQUAL: number;
+    readonly LESS: number;
+    readonly LINE_LOOP: number;
+    readonly LINE_STRIP: number;
+    readonly LINE_WIDTH: number;
+    readonly LINEAR: number;
+    readonly LINEAR_MIPMAP_LINEAR: number;
+    readonly LINEAR_MIPMAP_NEAREST: number;
+    readonly LINES: number;
+    readonly LINK_STATUS: number;
+    readonly LOW_FLOAT: number;
+    readonly LOW_INT: number;
+    readonly LUMINANCE: number;
+    readonly LUMINANCE_ALPHA: number;
+    readonly MAX_COMBINED_TEXTURE_IMAGE_UNITS: number;
+    readonly MAX_CUBE_MAP_TEXTURE_SIZE: number;
+    readonly MAX_FRAGMENT_UNIFORM_VECTORS: number;
+    readonly MAX_RENDERBUFFER_SIZE: number;
+    readonly MAX_TEXTURE_IMAGE_UNITS: number;
+    readonly MAX_TEXTURE_SIZE: number;
+    readonly MAX_VARYING_VECTORS: number;
+    readonly MAX_VERTEX_ATTRIBS: number;
+    readonly MAX_VERTEX_TEXTURE_IMAGE_UNITS: number;
+    readonly MAX_VERTEX_UNIFORM_VECTORS: number;
+    readonly MAX_VIEWPORT_DIMS: number;
+    readonly MEDIUM_FLOAT: number;
+    readonly MEDIUM_INT: number;
+    readonly MIRRORED_REPEAT: number;
+    readonly NEAREST: number;
+    readonly NEAREST_MIPMAP_LINEAR: number;
+    readonly NEAREST_MIPMAP_NEAREST: number;
+    readonly NEVER: number;
+    readonly NICEST: number;
+    readonly NO_ERROR: number;
+    readonly NONE: number;
+    readonly NOTEQUAL: number;
+    readonly ONE: number;
+    readonly ONE_MINUS_CONSTANT_ALPHA: number;
+    readonly ONE_MINUS_CONSTANT_COLOR: number;
+    readonly ONE_MINUS_DST_ALPHA: number;
+    readonly ONE_MINUS_DST_COLOR: number;
+    readonly ONE_MINUS_SRC_ALPHA: number;
+    readonly ONE_MINUS_SRC_COLOR: number;
+    readonly OUT_OF_MEMORY: number;
+    readonly PACK_ALIGNMENT: number;
+    readonly POINTS: number;
+    readonly POLYGON_OFFSET_FACTOR: number;
+    readonly POLYGON_OFFSET_FILL: number;
+    readonly POLYGON_OFFSET_UNITS: number;
+    readonly RED_BITS: number;
+    readonly RENDERBUFFER: number;
+    readonly RENDERBUFFER_ALPHA_SIZE: number;
+    readonly RENDERBUFFER_BINDING: number;
+    readonly RENDERBUFFER_BLUE_SIZE: number;
+    readonly RENDERBUFFER_DEPTH_SIZE: number;
+    readonly RENDERBUFFER_GREEN_SIZE: number;
+    readonly RENDERBUFFER_HEIGHT: number;
+    readonly RENDERBUFFER_INTERNAL_FORMAT: number;
+    readonly RENDERBUFFER_RED_SIZE: number;
+    readonly RENDERBUFFER_STENCIL_SIZE: number;
+    readonly RENDERBUFFER_WIDTH: number;
+    readonly RENDERER: number;
+    readonly REPEAT: number;
+    readonly REPLACE: number;
+    readonly RGB: number;
+    readonly RGB5_A1: number;
+    readonly RGB565: number;
+    readonly RGBA: number;
+    readonly RGBA4: number;
+    readonly SAMPLE_ALPHA_TO_COVERAGE: number;
+    readonly SAMPLE_BUFFERS: number;
+    readonly SAMPLE_COVERAGE: number;
+    readonly SAMPLE_COVERAGE_INVERT: number;
+    readonly SAMPLE_COVERAGE_VALUE: number;
+    readonly SAMPLER_2D: number;
+    readonly SAMPLER_CUBE: number;
+    readonly SAMPLES: number;
+    readonly SCISSOR_BOX: number;
+    readonly SCISSOR_TEST: number;
+    readonly SHADER_TYPE: number;
+    readonly SHADING_LANGUAGE_VERSION: number;
+    readonly SHORT: number;
+    readonly SRC_ALPHA: number;
+    readonly SRC_ALPHA_SATURATE: number;
+    readonly SRC_COLOR: number;
+    readonly STATIC_DRAW: number;
+    readonly STENCIL_ATTACHMENT: number;
+    readonly STENCIL_BACK_FAIL: number;
+    readonly STENCIL_BACK_FUNC: number;
+    readonly STENCIL_BACK_PASS_DEPTH_FAIL: number;
+    readonly STENCIL_BACK_PASS_DEPTH_PASS: number;
+    readonly STENCIL_BACK_REF: number;
+    readonly STENCIL_BACK_VALUE_MASK: number;
+    readonly STENCIL_BACK_WRITEMASK: number;
+    readonly STENCIL_BITS: number;
+    readonly STENCIL_BUFFER_BIT: number;
+    readonly STENCIL_CLEAR_VALUE: number;
+    readonly STENCIL_FAIL: number;
+    readonly STENCIL_FUNC: number;
+    readonly STENCIL_INDEX: number;
+    readonly STENCIL_INDEX8: number;
+    readonly STENCIL_PASS_DEPTH_FAIL: number;
+    readonly STENCIL_PASS_DEPTH_PASS: number;
+    readonly STENCIL_REF: number;
+    readonly STENCIL_TEST: number;
+    readonly STENCIL_VALUE_MASK: number;
+    readonly STENCIL_WRITEMASK: number;
+    readonly STREAM_DRAW: number;
+    readonly SUBPIXEL_BITS: number;
+    readonly TEXTURE: number;
+    readonly TEXTURE_2D: number;
+    readonly TEXTURE_BINDING_2D: number;
+    readonly TEXTURE_BINDING_CUBE_MAP: number;
+    readonly TEXTURE_CUBE_MAP: number;
+    readonly TEXTURE_CUBE_MAP_NEGATIVE_X: number;
+    readonly TEXTURE_CUBE_MAP_NEGATIVE_Y: number;
+    readonly TEXTURE_CUBE_MAP_NEGATIVE_Z: number;
+    readonly TEXTURE_CUBE_MAP_POSITIVE_X: number;
+    readonly TEXTURE_CUBE_MAP_POSITIVE_Y: number;
+    readonly TEXTURE_CUBE_MAP_POSITIVE_Z: number;
+    readonly TEXTURE_MAG_FILTER: number;
+    readonly TEXTURE_MIN_FILTER: number;
+    readonly TEXTURE_WRAP_S: number;
+    readonly TEXTURE_WRAP_T: number;
+    readonly TEXTURE0: number;
+    readonly TEXTURE1: number;
+    readonly TEXTURE10: number;
+    readonly TEXTURE11: number;
+    readonly TEXTURE12: number;
+    readonly TEXTURE13: number;
+    readonly TEXTURE14: number;
+    readonly TEXTURE15: number;
+    readonly TEXTURE16: number;
+    readonly TEXTURE17: number;
+    readonly TEXTURE18: number;
+    readonly TEXTURE19: number;
+    readonly TEXTURE2: number;
+    readonly TEXTURE20: number;
+    readonly TEXTURE21: number;
+    readonly TEXTURE22: number;
+    readonly TEXTURE23: number;
+    readonly TEXTURE24: number;
+    readonly TEXTURE25: number;
+    readonly TEXTURE26: number;
+    readonly TEXTURE27: number;
+    readonly TEXTURE28: number;
+    readonly TEXTURE29: number;
+    readonly TEXTURE3: number;
+    readonly TEXTURE30: number;
+    readonly TEXTURE31: number;
+    readonly TEXTURE4: number;
+    readonly TEXTURE5: number;
+    readonly TEXTURE6: number;
+    readonly TEXTURE7: number;
+    readonly TEXTURE8: number;
+    readonly TEXTURE9: number;
+    readonly TRIANGLE_FAN: number;
+    readonly TRIANGLE_STRIP: number;
+    readonly TRIANGLES: number;
+    readonly UNPACK_ALIGNMENT: number;
+    readonly UNPACK_COLORSPACE_CONVERSION_WEBGL: number;
+    readonly UNPACK_FLIP_Y_WEBGL: number;
+    readonly UNPACK_PREMULTIPLY_ALPHA_WEBGL: number;
+    readonly UNSIGNED_BYTE: number;
+    readonly UNSIGNED_INT: number;
+    readonly UNSIGNED_SHORT: number;
+    readonly UNSIGNED_SHORT_4_4_4_4: number;
+    readonly UNSIGNED_SHORT_5_5_5_1: number;
+    readonly UNSIGNED_SHORT_5_6_5: number;
+    readonly VALIDATE_STATUS: number;
+    readonly VENDOR: number;
+    readonly VERSION: number;
+    readonly VERTEX_ATTRIB_ARRAY_BUFFER_BINDING: number;
+    readonly VERTEX_ATTRIB_ARRAY_ENABLED: number;
+    readonly VERTEX_ATTRIB_ARRAY_NORMALIZED: number;
+    readonly VERTEX_ATTRIB_ARRAY_POINTER: number;
+    readonly VERTEX_ATTRIB_ARRAY_SIZE: number;
+    readonly VERTEX_ATTRIB_ARRAY_STRIDE: number;
+    readonly VERTEX_ATTRIB_ARRAY_TYPE: number;
+    readonly VERTEX_SHADER: number;
+    readonly VIEWPORT: number;
+    readonly ZERO: number;
+}
+
+declare var WebGLRenderingContext: {
+    prototype: WebGLRenderingContext;
+    new(): WebGLRenderingContext;
+    readonly ACTIVE_ATTRIBUTES: number;
+    readonly ACTIVE_TEXTURE: number;
+    readonly ACTIVE_UNIFORMS: number;
+    readonly ALIASED_LINE_WIDTH_RANGE: number;
+    readonly ALIASED_POINT_SIZE_RANGE: number;
+    readonly ALPHA: number;
+    readonly ALPHA_BITS: number;
+    readonly ALWAYS: number;
+    readonly ARRAY_BUFFER: number;
+    readonly ARRAY_BUFFER_BINDING: number;
+    readonly ATTACHED_SHADERS: number;
+    readonly BACK: number;
+    readonly BLEND: number;
+    readonly BLEND_COLOR: number;
+    readonly BLEND_DST_ALPHA: number;
+    readonly BLEND_DST_RGB: number;
+    readonly BLEND_EQUATION: number;
+    readonly BLEND_EQUATION_ALPHA: number;
+    readonly BLEND_EQUATION_RGB: number;
+    readonly BLEND_SRC_ALPHA: number;
+    readonly BLEND_SRC_RGB: number;
+    readonly BLUE_BITS: number;
+    readonly BOOL: number;
+    readonly BOOL_VEC2: number;
+    readonly BOOL_VEC3: number;
+    readonly BOOL_VEC4: number;
+    readonly BROWSER_DEFAULT_WEBGL: number;
+    readonly BUFFER_SIZE: number;
+    readonly BUFFER_USAGE: number;
+    readonly BYTE: number;
+    readonly CCW: number;
+    readonly CLAMP_TO_EDGE: number;
+    readonly COLOR_ATTACHMENT0: number;
+    readonly COLOR_BUFFER_BIT: number;
+    readonly COLOR_CLEAR_VALUE: number;
+    readonly COLOR_WRITEMASK: number;
+    readonly COMPILE_STATUS: number;
+    readonly COMPRESSED_TEXTURE_FORMATS: number;
+    readonly CONSTANT_ALPHA: number;
+    readonly CONSTANT_COLOR: number;
+    readonly CONTEXT_LOST_WEBGL: number;
+    readonly CULL_FACE: number;
+    readonly CULL_FACE_MODE: number;
+    readonly CURRENT_PROGRAM: number;
+    readonly CURRENT_VERTEX_ATTRIB: number;
+    readonly CW: number;
+    readonly DECR: number;
+    readonly DECR_WRAP: number;
+    readonly DELETE_STATUS: number;
+    readonly DEPTH_ATTACHMENT: number;
+    readonly DEPTH_BITS: number;
+    readonly DEPTH_BUFFER_BIT: number;
+    readonly DEPTH_CLEAR_VALUE: number;
+    readonly DEPTH_COMPONENT: number;
+    readonly DEPTH_COMPONENT16: number;
+    readonly DEPTH_FUNC: number;
+    readonly DEPTH_RANGE: number;
+    readonly DEPTH_STENCIL: number;
+    readonly DEPTH_STENCIL_ATTACHMENT: number;
+    readonly DEPTH_TEST: number;
+    readonly DEPTH_WRITEMASK: number;
+    readonly DITHER: number;
+    readonly DONT_CARE: number;
+    readonly DST_ALPHA: number;
+    readonly DST_COLOR: number;
+    readonly DYNAMIC_DRAW: number;
+    readonly ELEMENT_ARRAY_BUFFER: number;
+    readonly ELEMENT_ARRAY_BUFFER_BINDING: number;
+    readonly EQUAL: number;
+    readonly FASTEST: number;
+    readonly FLOAT: number;
+    readonly FLOAT_MAT2: number;
+    readonly FLOAT_MAT3: number;
+    readonly FLOAT_MAT4: number;
+    readonly FLOAT_VEC2: number;
+    readonly FLOAT_VEC3: number;
+    readonly FLOAT_VEC4: number;
+    readonly FRAGMENT_SHADER: number;
+    readonly FRAMEBUFFER: number;
+    readonly FRAMEBUFFER_ATTACHMENT_OBJECT_NAME: number;
+    readonly FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE: number;
+    readonly FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE: number;
+    readonly FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL: number;
+    readonly FRAMEBUFFER_BINDING: number;
+    readonly FRAMEBUFFER_COMPLETE: number;
+    readonly FRAMEBUFFER_INCOMPLETE_ATTACHMENT: number;
+    readonly FRAMEBUFFER_INCOMPLETE_DIMENSIONS: number;
+    readonly FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT: number;
+    readonly FRAMEBUFFER_UNSUPPORTED: number;
+    readonly FRONT: number;
+    readonly FRONT_AND_BACK: number;
+    readonly FRONT_FACE: number;
+    readonly FUNC_ADD: number;
+    readonly FUNC_REVERSE_SUBTRACT: number;
+    readonly FUNC_SUBTRACT: number;
+    readonly GENERATE_MIPMAP_HINT: number;
+    readonly GEQUAL: number;
+    readonly GREATER: number;
+    readonly GREEN_BITS: number;
+    readonly HIGH_FLOAT: number;
+    readonly HIGH_INT: number;
+    readonly IMPLEMENTATION_COLOR_READ_FORMAT: number;
+    readonly IMPLEMENTATION_COLOR_READ_TYPE: number;
+    readonly INCR: number;
+    readonly INCR_WRAP: number;
+    readonly INT: number;
+    readonly INT_VEC2: number;
+    readonly INT_VEC3: number;
+    readonly INT_VEC4: number;
+    readonly INVALID_ENUM: number;
+    readonly INVALID_FRAMEBUFFER_OPERATION: number;
+    readonly INVALID_OPERATION: number;
+    readonly INVALID_VALUE: number;
+    readonly INVERT: number;
+    readonly KEEP: number;
+    readonly LEQUAL: number;
+    readonly LESS: number;
+    readonly LINE_LOOP: number;
+    readonly LINE_STRIP: number;
+    readonly LINE_WIDTH: number;
+    readonly LINEAR: number;
+    readonly LINEAR_MIPMAP_LINEAR: number;
+    readonly LINEAR_MIPMAP_NEAREST: number;
+    readonly LINES: number;
+    readonly LINK_STATUS: number;
+    readonly LOW_FLOAT: number;
+    readonly LOW_INT: number;
+    readonly LUMINANCE: number;
+    readonly LUMINANCE_ALPHA: number;
+    readonly MAX_COMBINED_TEXTURE_IMAGE_UNITS: number;
+    readonly MAX_CUBE_MAP_TEXTURE_SIZE: number;
+    readonly MAX_FRAGMENT_UNIFORM_VECTORS: number;
+    readonly MAX_RENDERBUFFER_SIZE: number;
+    readonly MAX_TEXTURE_IMAGE_UNITS: number;
+    readonly MAX_TEXTURE_SIZE: number;
+    readonly MAX_VARYING_VECTORS: number;
+    readonly MAX_VERTEX_ATTRIBS: number;
+    readonly MAX_VERTEX_TEXTURE_IMAGE_UNITS: number;
+    readonly MAX_VERTEX_UNIFORM_VECTORS: number;
+    readonly MAX_VIEWPORT_DIMS: number;
+    readonly MEDIUM_FLOAT: number;
+    readonly MEDIUM_INT: number;
+    readonly MIRRORED_REPEAT: number;
+    readonly NEAREST: number;
+    readonly NEAREST_MIPMAP_LINEAR: number;
+    readonly NEAREST_MIPMAP_NEAREST: number;
+    readonly NEVER: number;
+    readonly NICEST: number;
+    readonly NO_ERROR: number;
+    readonly NONE: number;
+    readonly NOTEQUAL: number;
+    readonly ONE: number;
+    readonly ONE_MINUS_CONSTANT_ALPHA: number;
+    readonly ONE_MINUS_CONSTANT_COLOR: number;
+    readonly ONE_MINUS_DST_ALPHA: number;
+    readonly ONE_MINUS_DST_COLOR: number;
+    readonly ONE_MINUS_SRC_ALPHA: number;
+    readonly ONE_MINUS_SRC_COLOR: number;
+    readonly OUT_OF_MEMORY: number;
+    readonly PACK_ALIGNMENT: number;
+    readonly POINTS: number;
+    readonly POLYGON_OFFSET_FACTOR: number;
+    readonly POLYGON_OFFSET_FILL: number;
+    readonly POLYGON_OFFSET_UNITS: number;
+    readonly RED_BITS: number;
+    readonly RENDERBUFFER: number;
+    readonly RENDERBUFFER_ALPHA_SIZE: number;
+    readonly RENDERBUFFER_BINDING: number;
+    readonly RENDERBUFFER_BLUE_SIZE: number;
+    readonly RENDERBUFFER_DEPTH_SIZE: number;
+    readonly RENDERBUFFER_GREEN_SIZE: number;
+    readonly RENDERBUFFER_HEIGHT: number;
+    readonly RENDERBUFFER_INTERNAL_FORMAT: number;
+    readonly RENDERBUFFER_RED_SIZE: number;
+    readonly RENDERBUFFER_STENCIL_SIZE: number;
+    readonly RENDERBUFFER_WIDTH: number;
+    readonly RENDERER: number;
+    readonly REPEAT: number;
+    readonly REPLACE: number;
+    readonly RGB: number;
+    readonly RGB5_A1: number;
+    readonly RGB565: number;
+    readonly RGBA: number;
+    readonly RGBA4: number;
+    readonly SAMPLE_ALPHA_TO_COVERAGE: number;
+    readonly SAMPLE_BUFFERS: number;
+    readonly SAMPLE_COVERAGE: number;
+    readonly SAMPLE_COVERAGE_INVERT: number;
+    readonly SAMPLE_COVERAGE_VALUE: number;
+    readonly SAMPLER_2D: number;
+    readonly SAMPLER_CUBE: number;
+    readonly SAMPLES: number;
+    readonly SCISSOR_BOX: number;
+    readonly SCISSOR_TEST: number;
+    readonly SHADER_TYPE: number;
+    readonly SHADING_LANGUAGE_VERSION: number;
+    readonly SHORT: number;
+    readonly SRC_ALPHA: number;
+    readonly SRC_ALPHA_SATURATE: number;
+    readonly SRC_COLOR: number;
+    readonly STATIC_DRAW: number;
+    readonly STENCIL_ATTACHMENT: number;
+    readonly STENCIL_BACK_FAIL: number;
+    readonly STENCIL_BACK_FUNC: number;
+    readonly STENCIL_BACK_PASS_DEPTH_FAIL: number;
+    readonly STENCIL_BACK_PASS_DEPTH_PASS: number;
+    readonly STENCIL_BACK_REF: number;
+    readonly STENCIL_BACK_VALUE_MASK: number;
+    readonly STENCIL_BACK_WRITEMASK: number;
+    readonly STENCIL_BITS: number;
+    readonly STENCIL_BUFFER_BIT: number;
+    readonly STENCIL_CLEAR_VALUE: number;
+    readonly STENCIL_FAIL: number;
+    readonly STENCIL_FUNC: number;
+    readonly STENCIL_INDEX: number;
+    readonly STENCIL_INDEX8: number;
+    readonly STENCIL_PASS_DEPTH_FAIL: number;
+    readonly STENCIL_PASS_DEPTH_PASS: number;
+    readonly STENCIL_REF: number;
+    readonly STENCIL_TEST: number;
+    readonly STENCIL_VALUE_MASK: number;
+    readonly STENCIL_WRITEMASK: number;
+    readonly STREAM_DRAW: number;
+    readonly SUBPIXEL_BITS: number;
+    readonly TEXTURE: number;
+    readonly TEXTURE_2D: number;
+    readonly TEXTURE_BINDING_2D: number;
+    readonly TEXTURE_BINDING_CUBE_MAP: number;
+    readonly TEXTURE_CUBE_MAP: number;
+    readonly TEXTURE_CUBE_MAP_NEGATIVE_X: number;
+    readonly TEXTURE_CUBE_MAP_NEGATIVE_Y: number;
+    readonly TEXTURE_CUBE_MAP_NEGATIVE_Z: number;
+    readonly TEXTURE_CUBE_MAP_POSITIVE_X: number;
+    readonly TEXTURE_CUBE_MAP_POSITIVE_Y: number;
+    readonly TEXTURE_CUBE_MAP_POSITIVE_Z: number;
+    readonly TEXTURE_MAG_FILTER: number;
+    readonly TEXTURE_MIN_FILTER: number;
+    readonly TEXTURE_WRAP_S: number;
+    readonly TEXTURE_WRAP_T: number;
+    readonly TEXTURE0: number;
+    readonly TEXTURE1: number;
+    readonly TEXTURE10: number;
+    readonly TEXTURE11: number;
+    readonly TEXTURE12: number;
+    readonly TEXTURE13: number;
+    readonly TEXTURE14: number;
+    readonly TEXTURE15: number;
+    readonly TEXTURE16: number;
+    readonly TEXTURE17: number;
+    readonly TEXTURE18: number;
+    readonly TEXTURE19: number;
+    readonly TEXTURE2: number;
+    readonly TEXTURE20: number;
+    readonly TEXTURE21: number;
+    readonly TEXTURE22: number;
+    readonly TEXTURE23: number;
+    readonly TEXTURE24: number;
+    readonly TEXTURE25: number;
+    readonly TEXTURE26: number;
+    readonly TEXTURE27: number;
+    readonly TEXTURE28: number;
+    readonly TEXTURE29: number;
+    readonly TEXTURE3: number;
+    readonly TEXTURE30: number;
+    readonly TEXTURE31: number;
+    readonly TEXTURE4: number;
+    readonly TEXTURE5: number;
+    readonly TEXTURE6: number;
+    readonly TEXTURE7: number;
+    readonly TEXTURE8: number;
+    readonly TEXTURE9: number;
+    readonly TRIANGLE_FAN: number;
+    readonly TRIANGLE_STRIP: number;
+    readonly TRIANGLES: number;
+    readonly UNPACK_ALIGNMENT: number;
+    readonly UNPACK_COLORSPACE_CONVERSION_WEBGL: number;
+    readonly UNPACK_FLIP_Y_WEBGL: number;
+    readonly UNPACK_PREMULTIPLY_ALPHA_WEBGL: number;
+    readonly UNSIGNED_BYTE: number;
+    readonly UNSIGNED_INT: number;
+    readonly UNSIGNED_SHORT: number;
+    readonly UNSIGNED_SHORT_4_4_4_4: number;
+    readonly UNSIGNED_SHORT_5_5_5_1: number;
+    readonly UNSIGNED_SHORT_5_6_5: number;
+    readonly VALIDATE_STATUS: number;
+    readonly VENDOR: number;
+    readonly VERSION: number;
+    readonly VERTEX_ATTRIB_ARRAY_BUFFER_BINDING: number;
+    readonly VERTEX_ATTRIB_ARRAY_ENABLED: number;
+    readonly VERTEX_ATTRIB_ARRAY_NORMALIZED: number;
+    readonly VERTEX_ATTRIB_ARRAY_POINTER: number;
+    readonly VERTEX_ATTRIB_ARRAY_SIZE: number;
+    readonly VERTEX_ATTRIB_ARRAY_STRIDE: number;
+    readonly VERTEX_ATTRIB_ARRAY_TYPE: number;
+    readonly VERTEX_SHADER: number;
+    readonly VIEWPORT: number;
+    readonly ZERO: number;
+};
+
+interface WebGLShader extends WebGLObject {
+}
+
+declare var WebGLShader: {
+    prototype: WebGLShader;
+    new(): WebGLShader;
+};
+
+interface WebGLShaderPrecisionFormat {
+    readonly precision: number;
+    readonly rangeMax: number;
+    readonly rangeMin: number;
+}
+
+declare var WebGLShaderPrecisionFormat: {
+    prototype: WebGLShaderPrecisionFormat;
+    new(): WebGLShaderPrecisionFormat;
+};
+
+interface WebGLTexture extends WebGLObject {
+}
+
+declare var WebGLTexture: {
+    prototype: WebGLTexture;
+    new(): WebGLTexture;
+};
+
+interface WebGLUniformLocation {
+}
+
+declare var WebGLUniformLocation: {
+    prototype: WebGLUniformLocation;
+    new(): WebGLUniformLocation;
+};
+
+interface WebKitCSSMatrix {
+    a: number;
+    b: number;
+    c: number;
+    d: number;
+    e: number;
+    f: number;
+    m11: number;
+    m12: number;
+    m13: number;
+    m14: number;
+    m21: number;
+    m22: number;
+    m23: number;
+    m24: number;
+    m31: number;
+    m32: number;
+    m33: number;
+    m34: number;
+    m41: number;
+    m42: number;
+    m43: number;
+    m44: number;
+    inverse(): WebKitCSSMatrix;
+    multiply(secondMatrix: WebKitCSSMatrix): WebKitCSSMatrix;
+    rotate(angleX: number, angleY?: number, angleZ?: number): WebKitCSSMatrix;
+    rotateAxisAngle(x: number, y: number, z: number, angle: number): WebKitCSSMatrix;
+    scale(scaleX: number, scaleY?: number, scaleZ?: number): WebKitCSSMatrix;
+    setMatrixValue(value: string): void;
+    skewX(angle: number): WebKitCSSMatrix;
+    skewY(angle: number): WebKitCSSMatrix;
+    toString(): string;
+    translate(x: number, y: number, z?: number): WebKitCSSMatrix;
+}
+
+declare var WebKitCSSMatrix: {
+    prototype: WebKitCSSMatrix;
+    new(text?: string): WebKitCSSMatrix;
+};
+
+interface WebKitDirectoryEntry extends WebKitEntry {
+    createReader(): WebKitDirectoryReader;
+}
+
+declare var WebKitDirectoryEntry: {
+    prototype: WebKitDirectoryEntry;
+    new(): WebKitDirectoryEntry;
+};
+
+interface WebKitDirectoryReader {
+    readEntries(successCallback: WebKitEntriesCallback, errorCallback?: WebKitErrorCallback): void;
+}
+
+declare var WebKitDirectoryReader: {
+    prototype: WebKitDirectoryReader;
+    new(): WebKitDirectoryReader;
+};
+
+interface WebKitEntry {
+    readonly filesystem: WebKitFileSystem;
+    readonly fullPath: string;
+    readonly isDirectory: boolean;
+    readonly isFile: boolean;
+    readonly name: string;
+}
+
+declare var WebKitEntry: {
+    prototype: WebKitEntry;
+    new(): WebKitEntry;
+};
+
+interface WebKitFileEntry extends WebKitEntry {
+    file(successCallback: WebKitFileCallback, errorCallback?: WebKitErrorCallback): void;
+}
+
+declare var WebKitFileEntry: {
+    prototype: WebKitFileEntry;
+    new(): WebKitFileEntry;
+};
+
+interface WebKitFileSystem {
+    readonly name: string;
+    readonly root: WebKitDirectoryEntry;
+}
+
+declare var WebKitFileSystem: {
+    prototype: WebKitFileSystem;
+    new(): WebKitFileSystem;
+};
+
+interface WebKitPoint {
+    x: number;
+    y: number;
+}
+
+declare var WebKitPoint: {
+    prototype: WebKitPoint;
+    new(x?: number, y?: number): WebKitPoint;
+};
+
+interface webkitRTCPeerConnection extends RTCPeerConnection {
+    addEventListener<K extends keyof RTCPeerConnectionEventMap>(type: K, listener: (this: webkitRTCPeerConnection, ev: RTCPeerConnectionEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var webkitRTCPeerConnection: {
+    prototype: webkitRTCPeerConnection;
+    new(configuration: RTCConfiguration): webkitRTCPeerConnection;
+};
+
+interface WebSocketEventMap {
+    "close": CloseEvent;
+    "error": Event;
+    "message": MessageEvent;
+    "open": Event;
+}
+
+interface WebSocket extends EventTarget {
+    binaryType: string;
+    readonly bufferedAmount: number;
+    readonly extensions: string;
+    onclose: (this: WebSocket, ev: CloseEvent) => any;
+    onerror: (this: WebSocket, ev: Event) => any;
+    onmessage: (this: WebSocket, ev: MessageEvent) => any;
+    onopen: (this: WebSocket, ev: Event) => any;
+    readonly protocol: string;
+    readonly readyState: number;
+    readonly url: string;
+    close(code?: number, reason?: string): void;
+    send(data: any): void;
+    readonly CLOSED: number;
+    readonly CLOSING: number;
+    readonly CONNECTING: number;
+    readonly OPEN: number;
+    addEventListener<K extends keyof WebSocketEventMap>(type: K, listener: (this: WebSocket, ev: WebSocketEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var WebSocket: {
+    prototype: WebSocket;
+    new(url: string, protocols?: string | string[]): WebSocket;
+    readonly CLOSED: number;
+    readonly CLOSING: number;
+    readonly CONNECTING: number;
+    readonly OPEN: number;
+};
+
+interface WheelEvent extends MouseEvent {
+    readonly deltaMode: number;
+    readonly deltaX: number;
+    readonly deltaY: number;
+    readonly deltaZ: number;
+    readonly wheelDelta: number;
+    readonly wheelDeltaX: number;
+    readonly wheelDeltaY: number;
+    getCurrentPoint(element: Element): void;
+    initWheelEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, buttonArg: number, relatedTargetArg: EventTarget, modifiersListArg: string, deltaXArg: number, deltaYArg: number, deltaZArg: number, deltaMode: number): void;
+    readonly DOM_DELTA_LINE: number;
+    readonly DOM_DELTA_PAGE: number;
+    readonly DOM_DELTA_PIXEL: number;
+}
+
+declare var WheelEvent: {
+    prototype: WheelEvent;
+    new(typeArg: string, eventInitDict?: WheelEventInit): WheelEvent;
+    readonly DOM_DELTA_LINE: number;
+    readonly DOM_DELTA_PAGE: number;
+    readonly DOM_DELTA_PIXEL: number;
+};
+
+interface WindowEventMap extends GlobalEventHandlersEventMap {
+    "abort": UIEvent;
+    "afterprint": Event;
+    "beforeprint": Event;
+    "beforeunload": BeforeUnloadEvent;
+    "blur": FocusEvent;
+    "canplay": Event;
+    "canplaythrough": Event;
+    "change": Event;
+    "click": MouseEvent;
+    "compassneedscalibration": Event;
+    "contextmenu": PointerEvent;
+    "dblclick": MouseEvent;
+    "devicelight": DeviceLightEvent;
+    "devicemotion": DeviceMotionEvent;
+    "deviceorientation": DeviceOrientationEvent;
+    "drag": DragEvent;
+    "dragend": DragEvent;
+    "dragenter": DragEvent;
+    "dragleave": DragEvent;
+    "dragover": DragEvent;
+    "dragstart": DragEvent;
+    "drop": DragEvent;
+    "durationchange": Event;
+    "emptied": Event;
+    "ended": MediaStreamErrorEvent;
+    "error": ErrorEvent;
+    "focus": FocusEvent;
+    "hashchange": HashChangeEvent;
+    "input": Event;
+    "invalid": Event;
+    "keydown": KeyboardEvent;
+    "keypress": KeyboardEvent;
+    "keyup": KeyboardEvent;
+    "load": Event;
+    "loadeddata": Event;
+    "loadedmetadata": Event;
+    "loadstart": Event;
+    "message": MessageEvent;
+    "mousedown": MouseEvent;
+    "mouseenter": MouseEvent;
+    "mouseleave": MouseEvent;
+    "mousemove": MouseEvent;
+    "mouseout": MouseEvent;
+    "mouseover": MouseEvent;
+    "mouseup": MouseEvent;
+    "mousewheel": WheelEvent;
+    "MSGestureChange": MSGestureEvent;
+    "MSGestureDoubleTap": MSGestureEvent;
+    "MSGestureEnd": MSGestureEvent;
+    "MSGestureHold": MSGestureEvent;
+    "MSGestureStart": MSGestureEvent;
+    "MSGestureTap": MSGestureEvent;
+    "MSInertiaStart": MSGestureEvent;
+    "MSPointerCancel": MSPointerEvent;
+    "MSPointerDown": MSPointerEvent;
+    "MSPointerEnter": MSPointerEvent;
+    "MSPointerLeave": MSPointerEvent;
+    "MSPointerMove": MSPointerEvent;
+    "MSPointerOut": MSPointerEvent;
+    "MSPointerOver": MSPointerEvent;
+    "MSPointerUp": MSPointerEvent;
+    "offline": Event;
+    "online": Event;
+    "orientationchange": Event;
+    "pagehide": PageTransitionEvent;
+    "pageshow": PageTransitionEvent;
+    "pause": Event;
+    "play": Event;
+    "playing": Event;
+    "popstate": PopStateEvent;
+    "progress": ProgressEvent;
+    "ratechange": Event;
+    "readystatechange": ProgressEvent;
+    "reset": Event;
+    "resize": UIEvent;
+    "scroll": UIEvent;
+    "seeked": Event;
+    "seeking": Event;
+    "select": UIEvent;
+    "stalled": Event;
+    "storage": StorageEvent;
+    "submit": Event;
+    "suspend": Event;
+    "timeupdate": Event;
+    "touchcancel": TouchEvent;
+    "touchend": TouchEvent;
+    "touchmove": TouchEvent;
+    "touchstart": TouchEvent;
+    "unload": Event;
+    "volumechange": Event;
+    "waiting": Event;
+}
+
+interface Window extends EventTarget, WindowTimers, WindowSessionStorage, WindowLocalStorage, WindowConsole, GlobalEventHandlers, IDBEnvironment, WindowBase64, GlobalFetch {
+    readonly applicationCache: ApplicationCache;
+    readonly caches: CacheStorage;
+    readonly clientInformation: Navigator;
+    readonly closed: boolean;
+    readonly crypto: Crypto;
+    defaultStatus: string;
+    readonly devicePixelRatio: number;
+    readonly document: Document;
+    readonly doNotTrack: string;
+    event: Event | undefined;
+    readonly external: External;
+    readonly frameElement: Element;
+    readonly frames: Window;
+    readonly history: History;
+    readonly innerHeight: number;
+    readonly innerWidth: number;
+    readonly isSecureContext: boolean;
+    readonly length: number;
+    readonly location: Location;
+    readonly locationbar: BarProp;
+    readonly menubar: BarProp;
+    readonly msContentScript: ExtensionScriptApis;
+    readonly msCredentials: MSCredentials;
+    name: string;
+    readonly navigator: Navigator;
+    offscreenBuffering: string | boolean;
+    onabort: (this: Window, ev: UIEvent) => any;
+    onafterprint: (this: Window, ev: Event) => any;
+    onbeforeprint: (this: Window, ev: Event) => any;
+    onbeforeunload: (this: Window, ev: BeforeUnloadEvent) => any;
+    onblur: (this: Window, ev: FocusEvent) => any;
+    oncanplay: (this: Window, ev: Event) => any;
+    oncanplaythrough: (this: Window, ev: Event) => any;
+    onchange: (this: Window, ev: Event) => any;
+    onclick: (this: Window, ev: MouseEvent) => any;
+    oncompassneedscalibration: (this: Window, ev: Event) => any;
+    oncontextmenu: (this: Window, ev: PointerEvent) => any;
+    ondblclick: (this: Window, ev: MouseEvent) => any;
+    ondevicelight: (this: Window, ev: DeviceLightEvent) => any;
+    ondevicemotion: (this: Window, ev: DeviceMotionEvent) => any;
+    ondeviceorientation: (this: Window, ev: DeviceOrientationEvent) => any;
+    ondrag: (this: Window, ev: DragEvent) => any;
+    ondragend: (this: Window, ev: DragEvent) => any;
+    ondragenter: (this: Window, ev: DragEvent) => any;
+    ondragleave: (this: Window, ev: DragEvent) => any;
+    ondragover: (this: Window, ev: DragEvent) => any;
+    ondragstart: (this: Window, ev: DragEvent) => any;
+    ondrop: (this: Window, ev: DragEvent) => any;
+    ondurationchange: (this: Window, ev: Event) => any;
+    onemptied: (this: Window, ev: Event) => any;
+    onended: (this: Window, ev: MediaStreamErrorEvent) => any;
+    onerror: ErrorEventHandler;
+    onfocus: (this: Window, ev: FocusEvent) => any;
+    onhashchange: (this: Window, ev: HashChangeEvent) => any;
+    oninput: (this: Window, ev: Event) => any;
+    oninvalid: (this: Window, ev: Event) => any;
+    onkeydown: (this: Window, ev: KeyboardEvent) => any;
+    onkeypress: (this: Window, ev: KeyboardEvent) => any;
+    onkeyup: (this: Window, ev: KeyboardEvent) => any;
+    onload: (this: Window, ev: Event) => any;
+    onloadeddata: (this: Window, ev: Event) => any;
+    onloadedmetadata: (this: Window, ev: Event) => any;
+    onloadstart: (this: Window, ev: Event) => any;
+    onmessage: (this: Window, ev: MessageEvent) => any;
+    onmousedown: (this: Window, ev: MouseEvent) => any;
+    onmouseenter: (this: Window, ev: MouseEvent) => any;
+    onmouseleave: (this: Window, ev: MouseEvent) => any;
+    onmousemove: (this: Window, ev: MouseEvent) => any;
+    onmouseout: (this: Window, ev: MouseEvent) => any;
+    onmouseover: (this: Window, ev: MouseEvent) => any;
+    onmouseup: (this: Window, ev: MouseEvent) => any;
+    onmousewheel: (this: Window, ev: WheelEvent) => any;
+    onmsgesturechange: (this: Window, ev: MSGestureEvent) => any;
+    onmsgesturedoubletap: (this: Window, ev: MSGestureEvent) => any;
+    onmsgestureend: (this: Window, ev: MSGestureEvent) => any;
+    onmsgesturehold: (this: Window, ev: MSGestureEvent) => any;
+    onmsgesturestart: (this: Window, ev: MSGestureEvent) => any;
+    onmsgesturetap: (this: Window, ev: MSGestureEvent) => any;
+    onmsinertiastart: (this: Window, ev: MSGestureEvent) => any;
+    onmspointercancel: (this: Window, ev: MSPointerEvent) => any;
+    onmspointerdown: (this: Window, ev: MSPointerEvent) => any;
+    onmspointerenter: (this: Window, ev: MSPointerEvent) => any;
+    onmspointerleave: (this: Window, ev: MSPointerEvent) => any;
+    onmspointermove: (this: Window, ev: MSPointerEvent) => any;
+    onmspointerout: (this: Window, ev: MSPointerEvent) => any;
+    onmspointerover: (this: Window, ev: MSPointerEvent) => any;
+    onmspointerup: (this: Window, ev: MSPointerEvent) => any;
+    onoffline: (this: Window, ev: Event) => any;
+    ononline: (this: Window, ev: Event) => any;
+    onorientationchange: (this: Window, ev: Event) => any;
+    onpagehide: (this: Window, ev: PageTransitionEvent) => any;
+    onpageshow: (this: Window, ev: PageTransitionEvent) => any;
+    onpause: (this: Window, ev: Event) => any;
+    onplay: (this: Window, ev: Event) => any;
+    onplaying: (this: Window, ev: Event) => any;
+    onpopstate: (this: Window, ev: PopStateEvent) => any;
+    onprogress: (this: Window, ev: ProgressEvent) => any;
+    onratechange: (this: Window, ev: Event) => any;
+    onreadystatechange: (this: Window, ev: ProgressEvent) => any;
+    onreset: (this: Window, ev: Event) => any;
+    onresize: (this: Window, ev: UIEvent) => any;
+    onscroll: (this: Window, ev: UIEvent) => any;
+    onseeked: (this: Window, ev: Event) => any;
+    onseeking: (this: Window, ev: Event) => any;
+    onselect: (this: Window, ev: UIEvent) => any;
+    onstalled: (this: Window, ev: Event) => any;
+    onstorage: (this: Window, ev: StorageEvent) => any;
+    onsubmit: (this: Window, ev: Event) => any;
+    onsuspend: (this: Window, ev: Event) => any;
+    ontimeupdate: (this: Window, ev: Event) => any;
+    ontouchcancel: (ev: TouchEvent) => any;
+    ontouchend: (ev: TouchEvent) => any;
+    ontouchmove: (ev: TouchEvent) => any;
+    ontouchstart: (ev: TouchEvent) => any;
+    onunload: (this: Window, ev: Event) => any;
+    onvolumechange: (this: Window, ev: Event) => any;
+    onwaiting: (this: Window, ev: Event) => any;
+    opener: any;
+    orientation: string | number;
+    readonly outerHeight: number;
+    readonly outerWidth: number;
+    readonly pageXOffset: number;
+    readonly pageYOffset: number;
+    readonly parent: Window;
+    readonly performance: Performance;
+    readonly personalbar: BarProp;
+    readonly screen: Screen;
+    readonly screenLeft: number;
+    readonly screenTop: number;
+    readonly screenX: number;
+    readonly screenY: number;
+    readonly scrollbars: BarProp;
+    readonly scrollX: number;
+    readonly scrollY: number;
+    readonly self: Window;
+    readonly speechSynthesis: SpeechSynthesis;
+    status: string;
+    readonly statusbar: BarProp;
+    readonly styleMedia: StyleMedia;
+    readonly toolbar: BarProp;
+    readonly top: Window;
+    readonly window: Window;
+    URL: typeof URL;
+    URLSearchParams: typeof URLSearchParams;
+    Blob: typeof Blob;
+    customElements: CustomElementRegistry;
+    alert(message?: any): void;
+    blur(): void;
+    cancelAnimationFrame(handle: number): void;
+    captureEvents(): void;
+    close(): void;
+    confirm(message?: string): boolean;
+    departFocus(navigationReason: NavigationReason, origin: FocusNavigationOrigin): void;
+    focus(): void;
+    getComputedStyle(elt: Element, pseudoElt?: string): CSSStyleDeclaration;
+    getMatchedCSSRules(elt: Element, pseudoElt?: string): CSSRuleList;
+    getSelection(): Selection;
+    matchMedia(mediaQuery: string): MediaQueryList;
+    moveBy(x?: number, y?: number): void;
+    moveTo(x?: number, y?: number): void;
+    msWriteProfilerMark(profilerMarkName: string): void;
+    open(url?: string, target?: string, features?: string, replace?: boolean): Window;
+    postMessage(message: any, targetOrigin: string, transfer?: any[]): void;
+    print(): void;
+    prompt(message?: string, _default?: string): string | null;
+    releaseEvents(): void;
+    requestAnimationFrame(callback: FrameRequestCallback): number;
+    resizeBy(x?: number, y?: number): void;
+    resizeTo(x?: number, y?: number): void;
+    scroll(x?: number, y?: number): void;
+    scrollBy(x?: number, y?: number): void;
+    scrollTo(x?: number, y?: number): void;
+    stop(): void;
+    webkitCancelAnimationFrame(handle: number): void;
+    webkitConvertPointFromNodeToPage(node: Node, pt: WebKitPoint): WebKitPoint;
+    webkitConvertPointFromPageToNode(node: Node, pt: WebKitPoint): WebKitPoint;
+    webkitRequestAnimationFrame(callback: FrameRequestCallback): number;
+    createImageBitmap(image: HTMLImageElement | SVGImageElement | HTMLVideoElement | HTMLCanvasElement | ImageBitmap | ImageData | Blob, options?: ImageBitmapOptions): Promise<ImageBitmap>;
+    createImageBitmap(image: HTMLImageElement | SVGImageElement | HTMLVideoElement | HTMLCanvasElement | ImageBitmap | ImageData | Blob, sx: number, sy: number, sw: number, sh: number, options?: ImageBitmapOptions): Promise<ImageBitmap>;
+    scroll(options?: ScrollToOptions): void;
+    scrollTo(options?: ScrollToOptions): void;
+    scrollBy(options?: ScrollToOptions): void;
+    addEventListener<K extends keyof WindowEventMap>(type: K, listener: (this: Window, ev: WindowEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var Window: {
+    prototype: Window;
+    new(): Window;
+};
+
+interface WorkerEventMap extends AbstractWorkerEventMap {
+    "message": MessageEvent;
+}
+
+interface Worker extends EventTarget, AbstractWorker {
+    onmessage: (this: Worker, ev: MessageEvent) => any;
+    postMessage(message: any, transfer?: any[]): void;
+    terminate(): void;
+    addEventListener<K extends keyof WorkerEventMap>(type: K, listener: (this: Worker, ev: WorkerEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var Worker: {
+    prototype: Worker;
+    new(stringUrl: string): Worker;
+};
+
+interface XMLDocument extends Document {
+    addEventListener<K extends keyof DocumentEventMap>(type: K, listener: (this: XMLDocument, ev: DocumentEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var XMLDocument: {
+    prototype: XMLDocument;
+    new(): XMLDocument;
+};
+
+interface XMLHttpRequestEventMap extends XMLHttpRequestEventTargetEventMap {
+    "readystatechange": Event;
+}
+
+interface XMLHttpRequest extends EventTarget, XMLHttpRequestEventTarget {
+    onreadystatechange: (this: XMLHttpRequest, ev: Event) => any;
+    readonly readyState: number;
+    readonly response: any;
+    readonly responseText: string;
+    responseType: XMLHttpRequestResponseType;
+    readonly responseURL: string;
+    readonly responseXML: Document | null;
+    readonly status: number;
+    readonly statusText: string;
+    timeout: number;
+    readonly upload: XMLHttpRequestUpload;
+    withCredentials: boolean;
+    msCaching?: string;
+    abort(): void;
+    getAllResponseHeaders(): string;
+    getResponseHeader(header: string): string | null;
+    msCachingEnabled(): boolean;
+    open(method: string, url: string, async?: boolean, user?: string, password?: string): void;
+    overrideMimeType(mime: string): void;
+    send(data?: Document): void;
+    send(data?: string): void;
+    send(data?: any): void;
+    setRequestHeader(header: string, value: string): void;
+    readonly DONE: number;
+    readonly HEADERS_RECEIVED: number;
+    readonly LOADING: number;
+    readonly OPENED: number;
+    readonly UNSENT: number;
+    addEventListener<K extends keyof XMLHttpRequestEventMap>(type: K, listener: (this: XMLHttpRequest, ev: XMLHttpRequestEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var XMLHttpRequest: {
+    prototype: XMLHttpRequest;
+    new(): XMLHttpRequest;
+    readonly DONE: number;
+    readonly HEADERS_RECEIVED: number;
+    readonly LOADING: number;
+    readonly OPENED: number;
+    readonly UNSENT: number;
+};
+
+interface XMLHttpRequestUpload extends EventTarget, XMLHttpRequestEventTarget {
+    addEventListener<K extends keyof XMLHttpRequestEventTargetEventMap>(type: K, listener: (this: XMLHttpRequestUpload, ev: XMLHttpRequestEventTargetEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var XMLHttpRequestUpload: {
+    prototype: XMLHttpRequestUpload;
+    new(): XMLHttpRequestUpload;
+};
+
+interface XMLSerializer {
+    serializeToString(target: Node): string;
+}
+
+declare var XMLSerializer: {
+    prototype: XMLSerializer;
+    new(): XMLSerializer;
+};
+
+interface XPathEvaluator {
+    createExpression(expression: string, resolver: XPathNSResolver): XPathExpression;
+    createNSResolver(nodeResolver?: Node): XPathNSResolver;
+    evaluate(expression: string, contextNode: Node, resolver: XPathNSResolver | null, type: number, result: XPathResult | null): XPathResult;
+}
+
+declare var XPathEvaluator: {
+    prototype: XPathEvaluator;
+    new(): XPathEvaluator;
+};
+
+interface XPathExpression {
+    evaluate(contextNode: Node, type: number, result: XPathResult | null): XPathResult;
+}
+
+declare var XPathExpression: {
+    prototype: XPathExpression;
+    new(): XPathExpression;
+};
+
+interface XPathNSResolver {
+    lookupNamespaceURI(prefix: string): string;
+}
+
+declare var XPathNSResolver: {
+    prototype: XPathNSResolver;
+    new(): XPathNSResolver;
+};
+
+interface XPathResult {
+    readonly booleanValue: boolean;
+    readonly invalidIteratorState: boolean;
+    readonly numberValue: number;
+    readonly resultType: number;
+    readonly singleNodeValue: Node;
+    readonly snapshotLength: number;
+    readonly stringValue: string;
+    iterateNext(): Node;
+    snapshotItem(index: number): Node;
+    readonly ANY_TYPE: number;
+    readonly ANY_UNORDERED_NODE_TYPE: number;
+    readonly BOOLEAN_TYPE: number;
+    readonly FIRST_ORDERED_NODE_TYPE: number;
+    readonly NUMBER_TYPE: number;
+    readonly ORDERED_NODE_ITERATOR_TYPE: number;
+    readonly ORDERED_NODE_SNAPSHOT_TYPE: number;
+    readonly STRING_TYPE: number;
+    readonly UNORDERED_NODE_ITERATOR_TYPE: number;
+    readonly UNORDERED_NODE_SNAPSHOT_TYPE: number;
+}
+
+declare var XPathResult: {
+    prototype: XPathResult;
+    new(): XPathResult;
+    readonly ANY_TYPE: number;
+    readonly ANY_UNORDERED_NODE_TYPE: number;
+    readonly BOOLEAN_TYPE: number;
+    readonly FIRST_ORDERED_NODE_TYPE: number;
+    readonly NUMBER_TYPE: number;
+    readonly ORDERED_NODE_ITERATOR_TYPE: number;
+    readonly ORDERED_NODE_SNAPSHOT_TYPE: number;
+    readonly STRING_TYPE: number;
+    readonly UNORDERED_NODE_ITERATOR_TYPE: number;
+    readonly UNORDERED_NODE_SNAPSHOT_TYPE: number;
+};
+
+interface XSLTProcessor {
+    clearParameters(): void;
+    getParameter(namespaceURI: string, localName: string): any;
+    importStylesheet(style: Node): void;
+    removeParameter(namespaceURI: string, localName: string): void;
+    reset(): void;
+    setParameter(namespaceURI: string, localName: string, value: any): void;
+    transformToDocument(source: Node): Document;
+    transformToFragment(source: Node, document: Document): DocumentFragment;
+}
+
+declare var XSLTProcessor: {
+    prototype: XSLTProcessor;
+    new(): XSLTProcessor;
+};
+
+interface AbstractWorkerEventMap {
+    "error": ErrorEvent;
+}
+
+interface AbstractWorker {
+    onerror: (this: AbstractWorker, ev: ErrorEvent) => any;
+    addEventListener<K extends keyof AbstractWorkerEventMap>(type: K, listener: (this: AbstractWorker, ev: AbstractWorkerEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+interface Body {
+    readonly bodyUsed: boolean;
+    arrayBuffer(): Promise<ArrayBuffer>;
+    blob(): Promise<Blob>;
+    json(): Promise<any>;
+    text(): Promise<string>;
+    formData(): Promise<FormData>;
+}
+
+interface CanvasPathMethods {
+    arc(x: number, y: number, radius: number, startAngle: number, endAngle: number, anticlockwise?: boolean): void;
+    arcTo(x1: number, y1: number, x2: number, y2: number, radius: number): void;
+    bezierCurveTo(cp1x: number, cp1y: number, cp2x: number, cp2y: number, x: number, y: number): void;
+    closePath(): void;
+    ellipse(x: number, y: number, radiusX: number, radiusY: number, rotation: number, startAngle: number, endAngle: number, anticlockwise?: boolean): void;
+    lineTo(x: number, y: number): void;
+    moveTo(x: number, y: number): void;
+    quadraticCurveTo(cpx: number, cpy: number, x: number, y: number): void;
+    rect(x: number, y: number, w: number, h: number): void;
+}
+
+interface ChildNode {
+    remove(): void;
+}
+
+interface DocumentEvent {
+    createEvent(eventInterface: "AnimationEvent"): AnimationEvent;
+    createEvent(eventInterface: "AudioProcessingEvent"): AudioProcessingEvent;
+    createEvent(eventInterface: "BeforeUnloadEvent"): BeforeUnloadEvent;
+    createEvent(eventInterface: "ClipboardEvent"): ClipboardEvent;
+    createEvent(eventInterface: "CloseEvent"): CloseEvent;
+    createEvent(eventInterface: "CompositionEvent"): CompositionEvent;
+    createEvent(eventInterface: "CustomEvent"): CustomEvent;
+    createEvent(eventInterface: "DeviceLightEvent"): DeviceLightEvent;
+    createEvent(eventInterface: "DeviceMotionEvent"): DeviceMotionEvent;
+    createEvent(eventInterface: "DeviceOrientationEvent"): DeviceOrientationEvent;
+    createEvent(eventInterface: "DragEvent"): DragEvent;
+    createEvent(eventInterface: "ErrorEvent"): ErrorEvent;
+    createEvent(eventInterface: "Event"): Event;
+    createEvent(eventInterface: "Events"): Event;
+    createEvent(eventInterface: "FocusEvent"): FocusEvent;
+    createEvent(eventInterface: "FocusNavigationEvent"): FocusNavigationEvent;
+    createEvent(eventInterface: "GamepadEvent"): GamepadEvent;
+    createEvent(eventInterface: "HashChangeEvent"): HashChangeEvent;
+    createEvent(eventInterface: "IDBVersionChangeEvent"): IDBVersionChangeEvent;
+    createEvent(eventInterface: "KeyboardEvent"): KeyboardEvent;
+    createEvent(eventInterface: "ListeningStateChangedEvent"): ListeningStateChangedEvent;
+    createEvent(eventInterface: "LongRunningScriptDetectedEvent"): LongRunningScriptDetectedEvent;
+    createEvent(eventInterface: "MSGestureEvent"): MSGestureEvent;
+    createEvent(eventInterface: "MSManipulationEvent"): MSManipulationEvent;
+    createEvent(eventInterface: "MSMediaKeyMessageEvent"): MSMediaKeyMessageEvent;
+    createEvent(eventInterface: "MSMediaKeyNeededEvent"): MSMediaKeyNeededEvent;
+    createEvent(eventInterface: "MSPointerEvent"): MSPointerEvent;
+    createEvent(eventInterface: "MSSiteModeEvent"): MSSiteModeEvent;
+    createEvent(eventInterface: "MediaEncryptedEvent"): MediaEncryptedEvent;
+    createEvent(eventInterface: "MediaKeyMessageEvent"): MediaKeyMessageEvent;
+    createEvent(eventInterface: "MediaStreamErrorEvent"): MediaStreamErrorEvent;
+    createEvent(eventInterface: "MediaStreamEvent"): MediaStreamEvent;
+    createEvent(eventInterface: "MediaStreamTrackEvent"): MediaStreamTrackEvent;
+    createEvent(eventInterface: "MessageEvent"): MessageEvent;
+    createEvent(eventInterface: "MouseEvent"): MouseEvent;
+    createEvent(eventInterface: "MouseEvents"): MouseEvent;
+    createEvent(eventInterface: "MutationEvent"): MutationEvent;
+    createEvent(eventInterface: "MutationEvents"): MutationEvent;
+    createEvent(eventInterface: "NavigationCompletedEvent"): NavigationCompletedEvent;
+    createEvent(eventInterface: "NavigationEvent"): NavigationEvent;
+    createEvent(eventInterface: "NavigationEventWithReferrer"): NavigationEventWithReferrer;
+    createEvent(eventInterface: "OfflineAudioCompletionEvent"): OfflineAudioCompletionEvent;
+    createEvent(eventInterface: "OverflowEvent"): OverflowEvent;
+    createEvent(eventInterface: "PageTransitionEvent"): PageTransitionEvent;
+    createEvent(eventInterface: "PaymentRequestUpdateEvent"): PaymentRequestUpdateEvent;
+    createEvent(eventInterface: "PermissionRequestedEvent"): PermissionRequestedEvent;
+    createEvent(eventInterface: "PointerEvent"): PointerEvent;
+    createEvent(eventInterface: "PopStateEvent"): PopStateEvent;
+    createEvent(eventInterface: "ProgressEvent"): ProgressEvent;
+    createEvent(eventInterface: "RTCDTMFToneChangeEvent"): RTCDTMFToneChangeEvent;
+    createEvent(eventInterface: "RTCDtlsTransportStateChangedEvent"): RTCDtlsTransportStateChangedEvent;
+    createEvent(eventInterface: "RTCIceCandidatePairChangedEvent"): RTCIceCandidatePairChangedEvent;
+    createEvent(eventInterface: "RTCIceGathererEvent"): RTCIceGathererEvent;
+    createEvent(eventInterface: "RTCIceTransportStateChangedEvent"): RTCIceTransportStateChangedEvent;
+    createEvent(eventInterface: "RTCPeerConnectionIceEvent"): RTCPeerConnectionIceEvent;
+    createEvent(eventInterface: "RTCSsrcConflictEvent"): RTCSsrcConflictEvent;
+    createEvent(eventInterface: "SVGZoomEvent"): SVGZoomEvent;
+    createEvent(eventInterface: "SVGZoomEvents"): SVGZoomEvent;
+    createEvent(eventInterface: "ScriptNotifyEvent"): ScriptNotifyEvent;
+    createEvent(eventInterface: "ServiceWorkerMessageEvent"): ServiceWorkerMessageEvent;
+    createEvent(eventInterface: "SpeechSynthesisEvent"): SpeechSynthesisEvent;
+    createEvent(eventInterface: "StorageEvent"): StorageEvent;
+    createEvent(eventInterface: "TextEvent"): TextEvent;
+    createEvent(eventInterface: "TouchEvent"): TouchEvent;
+    createEvent(eventInterface: "TrackEvent"): TrackEvent;
+    createEvent(eventInterface: "TransitionEvent"): TransitionEvent;
+    createEvent(eventInterface: "UIEvent"): UIEvent;
+    createEvent(eventInterface: "UIEvents"): UIEvent;
+    createEvent(eventInterface: "UnviewableContentIdentifiedEvent"): UnviewableContentIdentifiedEvent;
+    createEvent(eventInterface: "WebGLContextEvent"): WebGLContextEvent;
+    createEvent(eventInterface: "WheelEvent"): WheelEvent;
+    createEvent(eventInterface: string): Event;
+}
+
+interface DOML2DeprecatedColorProperty {
+    color: string;
+}
+
+interface DOML2DeprecatedSizeProperty {
+    size: number;
+}
+
+interface ElementTraversal {
+    readonly childElementCount: number;
+    readonly firstElementChild: Element | null;
+    readonly lastElementChild: Element | null;
+    readonly nextElementSibling: Element | null;
+    readonly previousElementSibling: Element | null;
+}
+
+interface GetSVGDocument {
+    getSVGDocument(): Document;
+}
+
+interface GlobalEventHandlersEventMap {
+    "pointercancel": PointerEvent;
+    "pointerdown": PointerEvent;
+    "pointerenter": PointerEvent;
+    "pointerleave": PointerEvent;
+    "pointermove": PointerEvent;
+    "pointerout": PointerEvent;
+    "pointerover": PointerEvent;
+    "pointerup": PointerEvent;
+    "wheel": WheelEvent;
+}
+
+interface GlobalEventHandlers {
+    onpointercancel: (this: GlobalEventHandlers, ev: PointerEvent) => any;
+    onpointerdown: (this: GlobalEventHandlers, ev: PointerEvent) => any;
+    onpointerenter: (this: GlobalEventHandlers, ev: PointerEvent) => any;
+    onpointerleave: (this: GlobalEventHandlers, ev: PointerEvent) => any;
+    onpointermove: (this: GlobalEventHandlers, ev: PointerEvent) => any;
+    onpointerout: (this: GlobalEventHandlers, ev: PointerEvent) => any;
+    onpointerover: (this: GlobalEventHandlers, ev: PointerEvent) => any;
+    onpointerup: (this: GlobalEventHandlers, ev: PointerEvent) => any;
+    onwheel: (this: GlobalEventHandlers, ev: WheelEvent) => any;
+    addEventListener<K extends keyof GlobalEventHandlersEventMap>(type: K, listener: (this: GlobalEventHandlers, ev: GlobalEventHandlersEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+interface GlobalFetch {
+    fetch(input: RequestInfo, init?: RequestInit): Promise<Response>;
+}
+
+interface HTMLTableAlignment {
+    /**
+     * Sets or retrieves a value that you can use to implement your own ch functionality for the object.
+     */
+    ch: string;
+    /**
+     * Sets or retrieves a value that you can use to implement your own chOff functionality for the object.
+     */
+    chOff: string;
+    /**
+     * Sets or retrieves how text and other content are vertically aligned within the object that contains them.
+     */
+    vAlign: string;
+}
+
+interface IDBEnvironment {
+    readonly indexedDB: IDBFactory;
+}
+
+interface LinkStyle {
+    readonly sheet: StyleSheet;
+}
+
+interface MSBaseReaderEventMap {
+    "abort": Event;
+    "error": ErrorEvent;
+    "load": Event;
+    "loadend": ProgressEvent;
+    "loadstart": Event;
+    "progress": ProgressEvent;
+}
+
+interface MSBaseReader {
+    onabort: (this: MSBaseReader, ev: Event) => any;
+    onerror: (this: MSBaseReader, ev: ErrorEvent) => any;
+    onload: (this: MSBaseReader, ev: Event) => any;
+    onloadend: (this: MSBaseReader, ev: ProgressEvent) => any;
+    onloadstart: (this: MSBaseReader, ev: Event) => any;
+    onprogress: (this: MSBaseReader, ev: ProgressEvent) => any;
+    readonly readyState: number;
+    readonly result: any;
+    abort(): void;
+    readonly DONE: number;
+    readonly EMPTY: number;
+    readonly LOADING: number;
+    addEventListener<K extends keyof MSBaseReaderEventMap>(type: K, listener: (this: MSBaseReader, ev: MSBaseReaderEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+interface MSFileSaver {
+    msSaveBlob(blob: any, defaultName?: string): boolean;
+    msSaveOrOpenBlob(blob: any, defaultName?: string): boolean;
+}
+
+interface MSNavigatorDoNotTrack {
+    confirmSiteSpecificTrackingException(args: ConfirmSiteSpecificExceptionsInformation): boolean;
+    confirmWebWideTrackingException(args: ExceptionInformation): boolean;
+    removeSiteSpecificTrackingException(args: ExceptionInformation): void;
+    removeWebWideTrackingException(args: ExceptionInformation): void;
+    storeSiteSpecificTrackingException(args: StoreSiteSpecificExceptionsInformation): void;
+    storeWebWideTrackingException(args: StoreExceptionsInformation): void;
+}
+
+interface NavigatorBeacon {
+    sendBeacon(url: USVString, data?: BodyInit): boolean;
+}
+
+interface NavigatorConcurrentHardware {
+    readonly hardwareConcurrency: number;
+}
+
+interface NavigatorContentUtils {
+}
+
+interface NavigatorGeolocation {
+    readonly geolocation: Geolocation;
+}
+
+interface NavigatorID {
+    readonly appCodeName: string;
+    readonly appName: string;
+    readonly appVersion: string;
+    readonly platform: string;
+    readonly product: string;
+    readonly productSub: string;
+    readonly userAgent: string;
+    readonly vendor: string;
+    readonly vendorSub: string;
+}
+
+interface NavigatorOnLine {
+    readonly onLine: boolean;
+}
+
+interface NavigatorStorageUtils {
+}
+
+interface NavigatorUserMedia {
+    readonly mediaDevices: MediaDevices;
+    getUserMedia(constraints: MediaStreamConstraints, successCallback: NavigatorUserMediaSuccessCallback, errorCallback: NavigatorUserMediaErrorCallback): void;
+}
+
+interface NodeSelector {
+    querySelector<K extends keyof ElementTagNameMap>(selectors: K): ElementTagNameMap[K] | null;
+    querySelector(selectors: string): Element | null;
+    querySelectorAll<K extends keyof ElementListTagNameMap>(selectors: K): ElementListTagNameMap[K];
+    querySelectorAll(selectors: string): NodeListOf<Element>;
+}
+
+interface RandomSource {
+    getRandomValues(array: ArrayBufferView): ArrayBufferView;
+}
+
+interface SVGAnimatedPoints {
+    readonly animatedPoints: SVGPointList;
+    readonly points: SVGPointList;
+}
+
+interface SVGFilterPrimitiveStandardAttributes {
+    readonly height: SVGAnimatedLength;
+    readonly result: SVGAnimatedString;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+}
+
+interface SVGFitToViewBox {
+    readonly preserveAspectRatio: SVGAnimatedPreserveAspectRatio;
+    readonly viewBox: SVGAnimatedRect;
+}
+
+interface SVGTests {
+    readonly requiredExtensions: SVGStringList;
+    readonly requiredFeatures: SVGStringList;
+    readonly systemLanguage: SVGStringList;
+    hasExtension(extension: string): boolean;
+}
+
+interface SVGURIReference {
+    readonly href: SVGAnimatedString;
+}
+
+interface WindowBase64 {
+    atob(encodedString: string): string;
+    btoa(rawString: string): string;
+}
+
+interface WindowConsole {
+    readonly console: Console;
+}
+
+interface WindowLocalStorage {
+    readonly localStorage: Storage;
+}
+
+interface WindowSessionStorage {
+    readonly sessionStorage: Storage;
+}
+
+interface WindowTimers extends Object, WindowTimersExtension {
+    clearInterval(handle: number): void;
+    clearTimeout(handle: number): void;
+    setInterval(handler: (...args: any[]) => void, timeout: number): number;
+    setInterval(handler: any, timeout?: any, ...args: any[]): number;
+    setTimeout(handler: (...args: any[]) => void, timeout: number): number;
+    setTimeout(handler: any, timeout?: any, ...args: any[]): number;
+}
+
+interface WindowTimersExtension {
+    clearImmediate(handle: number): void;
+    setImmediate(handler: (...args: any[]) => void): number;
+    setImmediate(handler: any, ...args: any[]): number;
+}
+
+interface XMLHttpRequestEventTargetEventMap {
+    "abort": Event;
+    "error": ErrorEvent;
+    "load": Event;
+    "loadend": ProgressEvent;
+    "loadstart": Event;
+    "progress": ProgressEvent;
+    "timeout": ProgressEvent;
+}
+
+interface XMLHttpRequestEventTarget {
+    onabort: (this: XMLHttpRequestEventTarget, ev: Event) => any;
+    onerror: (this: XMLHttpRequestEventTarget, ev: ErrorEvent) => any;
+    onload: (this: XMLHttpRequestEventTarget, ev: Event) => any;
+    onloadend: (this: XMLHttpRequestEventTarget, ev: ProgressEvent) => any;
+    onloadstart: (this: XMLHttpRequestEventTarget, ev: Event) => any;
+    onprogress: (this: XMLHttpRequestEventTarget, ev: ProgressEvent) => any;
+    ontimeout: (this: XMLHttpRequestEventTarget, ev: ProgressEvent) => any;
+    addEventListener<K extends keyof XMLHttpRequestEventTargetEventMap>(type: K, listener: (this: XMLHttpRequestEventTarget, ev: XMLHttpRequestEventTargetEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+interface ErrorEventInit {
+    message?: string;
+    filename?: string;
+    lineno?: number;
+    conlno?: number;
+    error?: any;
+}
+
+interface StorageEventInit extends EventInit {
+    key?: string;
+    oldValue?: string;
+    newValue?: string;
+    url: string;
+    storageArea?: Storage;
+}
+
+interface Canvas2DContextAttributes {
+    alpha?: boolean;
+    willReadFrequently?: boolean;
+    storage?: boolean;
+    [attribute: string]: boolean | string | undefined;
+}
+
+interface ImageBitmapOptions {
+    imageOrientation?: "none" | "flipY";
+    premultiplyAlpha?: "none" | "premultiply" | "default";
+    colorSpaceConversion?: "none" | "default";
+    resizeWidth?: number;
+    resizeHeight?: number;
+    resizeQuality?: "pixelated" | "low" | "medium" | "high";
+}
+
+interface ImageBitmap {
+    readonly width: number;
+    readonly height: number;
+    close(): void;
+}
+
+interface URLSearchParams {
+    /**
+     * Appends a specified key/value pair as a new search parameter.
+     */
+    append(name: string, value: string): void;
+    /**
+     * Deletes the given search parameter, and its associated value, from the list of all search parameters.
+     */
+    delete(name: string): void;
+    /**
+     * Returns the first value associated to the given search parameter.
+     */
+    get(name: string): string | null;
+    /**
+     * Returns all the values association with a given search parameter.
+     */
+    getAll(name: string): string[];
+    /**
+     * Returns a Boolean indicating if such a search parameter exists.
+     */
+    has(name: string): boolean;
+    /**
+     * Sets the value associated to a given search parameter to the given value. If there were several values, delete the others.
+     */
+    set(name: string, value: string): void;
+}
+
+declare var URLSearchParams: {
+    prototype: URLSearchParams;
+    /**
+     * Constructor returning a URLSearchParams object.
+     */
+    new (init?: string | URLSearchParams): URLSearchParams;
+};
+
+interface NodeListOf<TNode extends Node> extends NodeList {
+    length: number;
+    item(index: number): TNode;
+    [index: number]: TNode;
+}
+
+interface HTMLCollectionOf<T extends Element> extends HTMLCollection {
+    item(index: number): T;
+    namedItem(name: string): T;
+    [index: number]: T;
+}
+
+interface BlobPropertyBag {
+    type?: string;
+    endings?: string;
+}
+
+interface FilePropertyBag {
+    type?: string;
+    lastModified?: number;
+}
+
+interface EventListenerObject {
+    handleEvent(evt: Event): void;
+}
+
+interface ProgressEventInit extends EventInit {
+    lengthComputable?: boolean;
+    loaded?: number;
+    total?: number;
+}
+
+interface ScrollOptions {
+    behavior?: ScrollBehavior;
+}
+
+interface ScrollToOptions extends ScrollOptions {
+    left?: number;
+    top?: number;
+}
+
+interface ScrollIntoViewOptions extends ScrollOptions {
+    block?: ScrollLogicalPosition;
+    inline?: ScrollLogicalPosition;
+}
+
+interface ClipboardEventInit extends EventInit {
+    data?: string;
+    dataType?: string;
+}
+
+interface IDBArrayKey extends Array<IDBValidKey> {
+}
+
+interface RsaKeyGenParams extends Algorithm {
+    modulusLength: number;
+    publicExponent: Uint8Array;
+}
+
+interface RsaHashedKeyGenParams extends RsaKeyGenParams {
+    hash: AlgorithmIdentifier;
+}
+
+interface RsaKeyAlgorithm extends KeyAlgorithm {
+    modulusLength: number;
+    publicExponent: Uint8Array;
+}
+
+interface RsaHashedKeyAlgorithm extends RsaKeyAlgorithm {
+    hash: AlgorithmIdentifier;
+}
+
+interface RsaHashedImportParams {
+    hash: AlgorithmIdentifier;
+}
+
+interface RsaPssParams {
+    saltLength: number;
+}
+
+interface RsaOaepParams extends Algorithm {
+    label?: BufferSource;
+}
+
+interface EcdsaParams extends Algorithm {
+    hash: AlgorithmIdentifier;
+}
+
+interface EcKeyGenParams extends Algorithm {
+    namedCurve: string;
+}
+
+interface EcKeyAlgorithm extends KeyAlgorithm {
+    typedCurve: string;
+}
+
+interface EcKeyImportParams {
+    namedCurve: string;
+}
+
+interface EcdhKeyDeriveParams extends Algorithm {
+    public: CryptoKey;
+}
+
+interface AesCtrParams extends Algorithm {
+    counter: BufferSource;
+    length: number;
+}
+
+interface AesKeyAlgorithm extends KeyAlgorithm {
+    length: number;
+}
+
+interface AesKeyGenParams extends Algorithm {
+    length: number;
+}
+
+interface AesDerivedKeyParams extends Algorithm {
+    length: number;
+}
+
+interface AesCbcParams extends Algorithm {
+    iv: BufferSource;
+}
+
+interface AesCmacParams extends Algorithm {
+    length: number;
+}
+
+interface AesGcmParams extends Algorithm {
+    iv: BufferSource;
+    additionalData?: BufferSource;
+    tagLength?: number;
+}
+
+interface AesCfbParams extends Algorithm {
+    iv: BufferSource;
+}
+
+interface HmacImportParams extends Algorithm {
+    hash?: AlgorithmIdentifier;
+    length?: number;
+}
+
+interface HmacKeyAlgorithm extends KeyAlgorithm {
+    hash: AlgorithmIdentifier;
+    length: number;
+}
+
+interface HmacKeyGenParams extends Algorithm {
+    hash: AlgorithmIdentifier;
+    length?: number;
+}
+
+interface DhKeyGenParams extends Algorithm {
+    prime: Uint8Array;
+    generator: Uint8Array;
+}
+
+interface DhKeyAlgorithm extends KeyAlgorithm {
+    prime: Uint8Array;
+    generator: Uint8Array;
+}
+
+interface DhKeyDeriveParams extends Algorithm {
+    public: CryptoKey;
+}
+
+interface DhImportKeyParams extends Algorithm {
+    prime: Uint8Array;
+    generator: Uint8Array;
+}
+
+interface ConcatParams extends Algorithm {
+    hash?: AlgorithmIdentifier;
+    algorithmId: Uint8Array;
+    partyUInfo: Uint8Array;
+    partyVInfo: Uint8Array;
+    publicInfo?: Uint8Array;
+    privateInfo?: Uint8Array;
+}
+
+interface HkdfCtrParams extends Algorithm {
+    hash: AlgorithmIdentifier;
+    label: BufferSource;
+    context: BufferSource;
+}
+
+interface Pbkdf2Params extends Algorithm {
+    salt: BufferSource;
+    iterations: number;
+    hash: AlgorithmIdentifier;
+}
+
+interface RsaOtherPrimesInfo {
+    r: string;
+    d: string;
+    t: string;
+}
+
+interface JsonWebKey {
+    kty: string;
+    use?: string;
+    key_ops?: string[];
+    alg?: string;
+    kid?: string;
+    x5u?: string;
+    x5c?: string;
+    x5t?: string;
+    ext?: boolean;
+    crv?: string;
+    x?: string;
+    y?: string;
+    d?: string;
+    n?: string;
+    e?: string;
+    p?: string;
+    q?: string;
+    dp?: string;
+    dq?: string;
+    qi?: string;
+    oth?: RsaOtherPrimesInfo[];
+    k?: string;
+}
+
+interface ParentNode {
+    readonly children: HTMLCollection;
+    readonly firstElementChild: Element | null;
+    readonly lastElementChild: Element | null;
+    readonly childElementCount: number;
+}
+
+interface DocumentOrShadowRoot {
+    readonly activeElement: Element | null;
+    readonly stylesheets: StyleSheetList;
+    getSelection(): Selection | null;
+    elementFromPoint(x: number, y: number): Element | null;
+    elementsFromPoint(x: number, y: number): Element[];
+}
+
+interface ShadowRoot extends DocumentOrShadowRoot, DocumentFragment {
+    readonly host: Element;
+    innerHTML: string;
+}
+
+interface ShadowRootInit {
+    mode: "open" | "closed";
+    delegatesFocus?: boolean;
+}
+
+interface HTMLSlotElement extends HTMLElement {
+    name: string;
+    assignedNodes(options?: AssignedNodesOptions): Node[];
+}
+
+interface AssignedNodesOptions {
+    flatten?: boolean;
+}
+
+interface ElementDefinitionOptions {
+    extends: string;
+}
+
+interface CustomElementRegistry {
+    define(name: string, constructor: Function, options?: ElementDefinitionOptions): void;
+    get(name: string): any;
+    whenDefined(name: string): PromiseLike<void>;
+}
+
+interface PromiseRejectionEvent extends Event {
+    readonly promise: PromiseLike<any>;
+    readonly reason: any;
+}
+
+interface PromiseRejectionEventInit extends EventInit {
+    promise: PromiseLike<any>;
+    reason?: any;
+}
+
+interface EventListenerOptions {
+    capture?: boolean;
+}
+
+interface AddEventListenerOptions extends EventListenerOptions {
+    passive?: boolean;
+    once?: boolean;
+}
+
+interface TouchEventInit extends EventModifierInit {
+    touches?: Touch[];
+    targetTouches?: Touch[];
+    changedTouches?: Touch[];
+}
+
+declare type EventListenerOrEventListenerObject = EventListener | EventListenerObject;
+
+interface DecodeErrorCallback {
+    (error: DOMException): void;
+}
+interface DecodeSuccessCallback {
+    (decodedData: AudioBuffer): void;
+}
+interface ErrorEventHandler {
+    (message: string, filename?: string, lineno?: number, colno?: number, error?: Error): void;
+}
+interface ForEachCallback {
+    (keyId: any, status: MediaKeyStatus): void;
+}
+interface FrameRequestCallback {
+    (time: number): void;
+}
+interface FunctionStringCallback {
+    (data: string): void;
+}
+interface IntersectionObserverCallback {
+    (entries: IntersectionObserverEntry[], observer: IntersectionObserver): void;
+}
+interface MediaQueryListListener {
+    (mql: MediaQueryList): void;
+}
+interface MSExecAtPriorityFunctionCallback {
+    (...args: any[]): any;
+}
+interface MSLaunchUriCallback {
+    (): void;
+}
+interface MSUnsafeFunctionCallback {
+    (): any;
+}
+interface MutationCallback {
+    (mutations: MutationRecord[], observer: MutationObserver): void;
+}
+interface NavigatorUserMediaErrorCallback {
+    (error: MediaStreamError): void;
+}
+interface NavigatorUserMediaSuccessCallback {
+    (stream: MediaStream): void;
+}
+interface NotificationPermissionCallback {
+    (permission: NotificationPermission): void;
+}
+interface PositionCallback {
+    (position: Position): void;
+}
+interface PositionErrorCallback {
+    (error: PositionError): void;
+}
+interface RTCPeerConnectionErrorCallback {
+    (error: DOMError): void;
+}
+interface RTCSessionDescriptionCallback {
+    (sdp: RTCSessionDescription): void;
+}
+interface RTCStatsCallback {
+    (report: RTCStatsReport): void;
+}
+interface VoidFunction {
+    (): void;
+}
+interface HTMLElementTagNameMap {
+    "a": HTMLAnchorElement;
+    "applet": HTMLAppletElement;
+    "area": HTMLAreaElement;
+    "audio": HTMLAudioElement;
+    "base": HTMLBaseElement;
+    "basefont": HTMLBaseFontElement;
+    "blockquote": HTMLQuoteElement;
+    "body": HTMLBodyElement;
+    "br": HTMLBRElement;
+    "button": HTMLButtonElement;
+    "canvas": HTMLCanvasElement;
+    "caption": HTMLTableCaptionElement;
+    "col": HTMLTableColElement;
+    "colgroup": HTMLTableColElement;
+    "data": HTMLDataElement;
+    "datalist": HTMLDataListElement;
+    "del": HTMLModElement;
+    "dir": HTMLDirectoryElement;
+    "div": HTMLDivElement;
+    "dl": HTMLDListElement;
+    "embed": HTMLEmbedElement;
+    "fieldset": HTMLFieldSetElement;
+    "font": HTMLFontElement;
+    "form": HTMLFormElement;
+    "frame": HTMLFrameElement;
+    "frameset": HTMLFrameSetElement;
+    "h1": HTMLHeadingElement;
+    "h2": HTMLHeadingElement;
+    "h3": HTMLHeadingElement;
+    "h4": HTMLHeadingElement;
+    "h5": HTMLHeadingElement;
+    "h6": HTMLHeadingElement;
+    "head": HTMLHeadElement;
+    "hr": HTMLHRElement;
+    "html": HTMLHtmlElement;
+    "iframe": HTMLIFrameElement;
+    "img": HTMLImageElement;
+    "input": HTMLInputElement;
+    "ins": HTMLModElement;
+    "isindex": HTMLUnknownElement;
+    "label": HTMLLabelElement;
+    "legend": HTMLLegendElement;
+    "li": HTMLLIElement;
+    "link": HTMLLinkElement;
+    "listing": HTMLPreElement;
+    "map": HTMLMapElement;
+    "marquee": HTMLMarqueeElement;
+    "menu": HTMLMenuElement;
+    "meta": HTMLMetaElement;
+    "meter": HTMLMeterElement;
+    "nextid": HTMLUnknownElement;
+    "object": HTMLObjectElement;
+    "ol": HTMLOListElement;
+    "optgroup": HTMLOptGroupElement;
+    "option": HTMLOptionElement;
+    "output": HTMLOutputElement;
+    "p": HTMLParagraphElement;
+    "param": HTMLParamElement;
+    "picture": HTMLPictureElement;
+    "pre": HTMLPreElement;
+    "progress": HTMLProgressElement;
+    "q": HTMLQuoteElement;
+    "script": HTMLScriptElement;
+    "select": HTMLSelectElement;
+    "source": HTMLSourceElement;
+    "span": HTMLSpanElement;
+    "style": HTMLStyleElement;
+    "table": HTMLTableElement;
+    "tbody": HTMLTableSectionElement;
+    "td": HTMLTableDataCellElement;
+    "template": HTMLTemplateElement;
+    "textarea": HTMLTextAreaElement;
+    "tfoot": HTMLTableSectionElement;
+    "th": HTMLTableHeaderCellElement;
+    "thead": HTMLTableSectionElement;
+    "time": HTMLTimeElement;
+    "title": HTMLTitleElement;
+    "tr": HTMLTableRowElement;
+    "track": HTMLTrackElement;
+    "ul": HTMLUListElement;
+    "video": HTMLVideoElement;
+    "x-ms-webview": MSHTMLWebViewElement;
+    "xmp": HTMLPreElement;
+}
+
+interface ElementTagNameMap extends HTMLElementTagNameMap {
+    "abbr": HTMLElement;
+    "acronym": HTMLElement;
+    "address": HTMLElement;
+    "article": HTMLElement;
+    "aside": HTMLElement;
+    "b": HTMLElement;
+    "bdo": HTMLElement;
+    "big": HTMLElement;
+    "center": HTMLElement;
+    "circle": SVGCircleElement;
+    "cite": HTMLElement;
+    "clippath": SVGClipPathElement;
+    "code": HTMLElement;
+    "dd": HTMLElement;
+    "defs": SVGDefsElement;
+    "desc": SVGDescElement;
+    "dfn": HTMLElement;
+    "dt": HTMLElement;
+    "ellipse": SVGEllipseElement;
+    "em": HTMLElement;
+    "feblend": SVGFEBlendElement;
+    "fecolormatrix": SVGFEColorMatrixElement;
+    "fecomponenttransfer": SVGFEComponentTransferElement;
+    "fecomposite": SVGFECompositeElement;
+    "feconvolvematrix": SVGFEConvolveMatrixElement;
+    "fediffuselighting": SVGFEDiffuseLightingElement;
+    "fedisplacementmap": SVGFEDisplacementMapElement;
+    "fedistantlight": SVGFEDistantLightElement;
+    "feflood": SVGFEFloodElement;
+    "fefunca": SVGFEFuncAElement;
+    "fefuncb": SVGFEFuncBElement;
+    "fefuncg": SVGFEFuncGElement;
+    "fefuncr": SVGFEFuncRElement;
+    "fegaussianblur": SVGFEGaussianBlurElement;
+    "feimage": SVGFEImageElement;
+    "femerge": SVGFEMergeElement;
+    "femergenode": SVGFEMergeNodeElement;
+    "femorphology": SVGFEMorphologyElement;
+    "feoffset": SVGFEOffsetElement;
+    "fepointlight": SVGFEPointLightElement;
+    "fespecularlighting": SVGFESpecularLightingElement;
+    "fespotlight": SVGFESpotLightElement;
+    "fetile": SVGFETileElement;
+    "feturbulence": SVGFETurbulenceElement;
+    "figcaption": HTMLElement;
+    "figure": HTMLElement;
+    "filter": SVGFilterElement;
+    "footer": HTMLElement;
+    "foreignobject": SVGForeignObjectElement;
+    "g": SVGGElement;
+    "header": HTMLElement;
+    "hgroup": HTMLElement;
+    "i": HTMLElement;
+    "image": SVGImageElement;
+    "kbd": HTMLElement;
+    "keygen": HTMLElement;
+    "line": SVGLineElement;
+    "lineargradient": SVGLinearGradientElement;
+    "mark": HTMLElement;
+    "marker": SVGMarkerElement;
+    "mask": SVGMaskElement;
+    "metadata": SVGMetadataElement;
+    "nav": HTMLElement;
+    "nobr": HTMLElement;
+    "noframes": HTMLElement;
+    "noscript": HTMLElement;
+    "path": SVGPathElement;
+    "pattern": SVGPatternElement;
+    "plaintext": HTMLElement;
+    "polygon": SVGPolygonElement;
+    "polyline": SVGPolylineElement;
+    "radialgradient": SVGRadialGradientElement;
+    "rect": SVGRectElement;
+    "rt": HTMLElement;
+    "ruby": HTMLElement;
+    "s": HTMLElement;
+    "samp": HTMLElement;
+    "section": HTMLElement;
+    "small": HTMLElement;
+    "stop": SVGStopElement;
+    "strike": HTMLElement;
+    "strong": HTMLElement;
+    "sub": HTMLElement;
+    "sup": HTMLElement;
+    "svg": SVGSVGElement;
+    "switch": SVGSwitchElement;
+    "symbol": SVGSymbolElement;
+    "text": SVGTextElement;
+    "textpath": SVGTextPathElement;
+    "tspan": SVGTSpanElement;
+    "tt": HTMLElement;
+    "u": HTMLElement;
+    "use": SVGUseElement;
+    "var": HTMLElement;
+    "view": SVGViewElement;
+    "wbr": HTMLElement;
+}
+
+type ElementListTagNameMap = {
+    [key in keyof ElementTagNameMap]: NodeListOf<ElementTagNameMap[key]>
+};
+
+declare var Audio: { new(src?: string): HTMLAudioElement; };
+declare var Image: { new(width?: number, height?: number): HTMLImageElement; };
+declare var Option: { new(text?: string, value?: string, defaultSelected?: boolean, selected?: boolean): HTMLOptionElement; };
+declare var applicationCache: ApplicationCache;
+declare var caches: CacheStorage;
+declare var clientInformation: Navigator;
+declare var closed: boolean;
+declare var crypto: Crypto;
+declare var defaultStatus: string;
+declare var devicePixelRatio: number;
+declare var document: Document;
+declare var doNotTrack: string;
+declare var event: Event | undefined;
+declare var external: External;
+declare var frameElement: Element;
+declare var frames: Window;
+declare var history: History;
+declare var innerHeight: number;
+declare var innerWidth: number;
+declare var isSecureContext: boolean;
+declare var length: number;
+declare var location: Location;
+declare var locationbar: BarProp;
+declare var menubar: BarProp;
+declare var msContentScript: ExtensionScriptApis;
+declare var msCredentials: MSCredentials;
+declare const name: never;
+declare var navigator: Navigator;
+declare var offscreenBuffering: string | boolean;
+declare var onabort: (this: Window, ev: UIEvent) => any;
+declare var onafterprint: (this: Window, ev: Event) => any;
+declare var onbeforeprint: (this: Window, ev: Event) => any;
+declare var onbeforeunload: (this: Window, ev: BeforeUnloadEvent) => any;
+declare var onblur: (this: Window, ev: FocusEvent) => any;
+declare var oncanplay: (this: Window, ev: Event) => any;
+declare var oncanplaythrough: (this: Window, ev: Event) => any;
+declare var onchange: (this: Window, ev: Event) => any;
+declare var onclick: (this: Window, ev: MouseEvent) => any;
+declare var oncompassneedscalibration: (this: Window, ev: Event) => any;
+declare var oncontextmenu: (this: Window, ev: PointerEvent) => any;
+declare var ondblclick: (this: Window, ev: MouseEvent) => any;
+declare var ondevicelight: (this: Window, ev: DeviceLightEvent) => any;
+declare var ondevicemotion: (this: Window, ev: DeviceMotionEvent) => any;
+declare var ondeviceorientation: (this: Window, ev: DeviceOrientationEvent) => any;
+declare var ondrag: (this: Window, ev: DragEvent) => any;
+declare var ondragend: (this: Window, ev: DragEvent) => any;
+declare var ondragenter: (this: Window, ev: DragEvent) => any;
+declare var ondragleave: (this: Window, ev: DragEvent) => any;
+declare var ondragover: (this: Window, ev: DragEvent) => any;
+declare var ondragstart: (this: Window, ev: DragEvent) => any;
+declare var ondrop: (this: Window, ev: DragEvent) => any;
+declare var ondurationchange: (this: Window, ev: Event) => any;
+declare var onemptied: (this: Window, ev: Event) => any;
+declare var onended: (this: Window, ev: MediaStreamErrorEvent) => any;
+declare var onerror: ErrorEventHandler;
+declare var onfocus: (this: Window, ev: FocusEvent) => any;
+declare var onhashchange: (this: Window, ev: HashChangeEvent) => any;
+declare var oninput: (this: Window, ev: Event) => any;
+declare var oninvalid: (this: Window, ev: Event) => any;
+declare var onkeydown: (this: Window, ev: KeyboardEvent) => any;
+declare var onkeypress: (this: Window, ev: KeyboardEvent) => any;
+declare var onkeyup: (this: Window, ev: KeyboardEvent) => any;
+declare var onload: (this: Window, ev: Event) => any;
+declare var onloadeddata: (this: Window, ev: Event) => any;
+declare var onloadedmetadata: (this: Window, ev: Event) => any;
+declare var onloadstart: (this: Window, ev: Event) => any;
+declare var onmessage: (this: Window, ev: MessageEvent) => any;
+declare var onmousedown: (this: Window, ev: MouseEvent) => any;
+declare var onmouseenter: (this: Window, ev: MouseEvent) => any;
+declare var onmouseleave: (this: Window, ev: MouseEvent) => any;
+declare var onmousemove: (this: Window, ev: MouseEvent) => any;
+declare var onmouseout: (this: Window, ev: MouseEvent) => any;
+declare var onmouseover: (this: Window, ev: MouseEvent) => any;
+declare var onmouseup: (this: Window, ev: MouseEvent) => any;
+declare var onmousewheel: (this: Window, ev: WheelEvent) => any;
+declare var onmsgesturechange: (this: Window, ev: MSGestureEvent) => any;
+declare var onmsgesturedoubletap: (this: Window, ev: MSGestureEvent) => any;
+declare var onmsgestureend: (this: Window, ev: MSGestureEvent) => any;
+declare var onmsgesturehold: (this: Window, ev: MSGestureEvent) => any;
+declare var onmsgesturestart: (this: Window, ev: MSGestureEvent) => any;
+declare var onmsgesturetap: (this: Window, ev: MSGestureEvent) => any;
+declare var onmsinertiastart: (this: Window, ev: MSGestureEvent) => any;
+declare var onmspointercancel: (this: Window, ev: MSPointerEvent) => any;
+declare var onmspointerdown: (this: Window, ev: MSPointerEvent) => any;
+declare var onmspointerenter: (this: Window, ev: MSPointerEvent) => any;
+declare var onmspointerleave: (this: Window, ev: MSPointerEvent) => any;
+declare var onmspointermove: (this: Window, ev: MSPointerEvent) => any;
+declare var onmspointerout: (this: Window, ev: MSPointerEvent) => any;
+declare var onmspointerover: (this: Window, ev: MSPointerEvent) => any;
+declare var onmspointerup: (this: Window, ev: MSPointerEvent) => any;
+declare var onoffline: (this: Window, ev: Event) => any;
+declare var ononline: (this: Window, ev: Event) => any;
+declare var onorientationchange: (this: Window, ev: Event) => any;
+declare var onpagehide: (this: Window, ev: PageTransitionEvent) => any;
+declare var onpageshow: (this: Window, ev: PageTransitionEvent) => any;
+declare var onpause: (this: Window, ev: Event) => any;
+declare var onplay: (this: Window, ev: Event) => any;
+declare var onplaying: (this: Window, ev: Event) => any;
+declare var onpopstate: (this: Window, ev: PopStateEvent) => any;
+declare var onprogress: (this: Window, ev: ProgressEvent) => any;
+declare var onratechange: (this: Window, ev: Event) => any;
+declare var onreadystatechange: (this: Window, ev: ProgressEvent) => any;
+declare var onreset: (this: Window, ev: Event) => any;
+declare var onresize: (this: Window, ev: UIEvent) => any;
+declare var onscroll: (this: Window, ev: UIEvent) => any;
+declare var onseeked: (this: Window, ev: Event) => any;
+declare var onseeking: (this: Window, ev: Event) => any;
+declare var onselect: (this: Window, ev: UIEvent) => any;
+declare var onstalled: (this: Window, ev: Event) => any;
+declare var onstorage: (this: Window, ev: StorageEvent) => any;
+declare var onsubmit: (this: Window, ev: Event) => any;
+declare var onsuspend: (this: Window, ev: Event) => any;
+declare var ontimeupdate: (this: Window, ev: Event) => any;
+declare var ontouchcancel: (ev: TouchEvent) => any;
+declare var ontouchend: (ev: TouchEvent) => any;
+declare var ontouchmove: (ev: TouchEvent) => any;
+declare var ontouchstart: (ev: TouchEvent) => any;
+declare var onunload: (this: Window, ev: Event) => any;
+declare var onvolumechange: (this: Window, ev: Event) => any;
+declare var onwaiting: (this: Window, ev: Event) => any;
+declare var opener: any;
+declare var orientation: string | number;
+declare var outerHeight: number;
+declare var outerWidth: number;
+declare var pageXOffset: number;
+declare var pageYOffset: number;
+declare var parent: Window;
+declare var performance: Performance;
+declare var personalbar: BarProp;
+declare var screen: Screen;
+declare var screenLeft: number;
+declare var screenTop: number;
+declare var screenX: number;
+declare var screenY: number;
+declare var scrollbars: BarProp;
+declare var scrollX: number;
+declare var scrollY: number;
+declare var self: Window;
+declare var speechSynthesis: SpeechSynthesis;
+declare var status: string;
+declare var statusbar: BarProp;
+declare var styleMedia: StyleMedia;
+declare var toolbar: BarProp;
+declare var top: Window;
+declare var window: Window;
+declare var customElements: CustomElementRegistry;
+declare function alert(message?: any): void;
+declare function blur(): void;
+declare function cancelAnimationFrame(handle: number): void;
+declare function captureEvents(): void;
+declare function close(): void;
+declare function confirm(message?: string): boolean;
+declare function departFocus(navigationReason: NavigationReason, origin: FocusNavigationOrigin): void;
+declare function focus(): void;
+declare function getComputedStyle(elt: Element, pseudoElt?: string): CSSStyleDeclaration;
+declare function getMatchedCSSRules(elt: Element, pseudoElt?: string): CSSRuleList;
+declare function getSelection(): Selection;
+declare function matchMedia(mediaQuery: string): MediaQueryList;
+declare function moveBy(x?: number, y?: number): void;
+declare function moveTo(x?: number, y?: number): void;
+declare function msWriteProfilerMark(profilerMarkName: string): void;
+declare function open(url?: string, target?: string, features?: string, replace?: boolean): Window;
+declare function postMessage(message: any, targetOrigin: string, transfer?: any[]): void;
+declare function print(): void;
+declare function prompt(message?: string, _default?: string): string | null;
+declare function releaseEvents(): void;
+declare function requestAnimationFrame(callback: FrameRequestCallback): number;
+declare function resizeBy(x?: number, y?: number): void;
+declare function resizeTo(x?: number, y?: number): void;
+declare function scroll(x?: number, y?: number): void;
+declare function scrollBy(x?: number, y?: number): void;
+declare function scrollTo(x?: number, y?: number): void;
+declare function stop(): void;
+declare function webkitCancelAnimationFrame(handle: number): void;
+declare function webkitConvertPointFromNodeToPage(node: Node, pt: WebKitPoint): WebKitPoint;
+declare function webkitConvertPointFromPageToNode(node: Node, pt: WebKitPoint): WebKitPoint;
+declare function webkitRequestAnimationFrame(callback: FrameRequestCallback): number;
+declare function createImageBitmap(image: HTMLImageElement | SVGImageElement | HTMLVideoElement | HTMLCanvasElement | ImageBitmap | ImageData | Blob, options?: ImageBitmapOptions): Promise<ImageBitmap>;
+declare function createImageBitmap(image: HTMLImageElement | SVGImageElement | HTMLVideoElement | HTMLCanvasElement | ImageBitmap | ImageData | Blob, sx: number, sy: number, sw: number, sh: number, options?: ImageBitmapOptions): Promise<ImageBitmap>;
+declare function scroll(options?: ScrollToOptions): void;
+declare function scrollTo(options?: ScrollToOptions): void;
+declare function scrollBy(options?: ScrollToOptions): void;
+declare function toString(): string;
+declare function dispatchEvent(evt: Event): boolean;
+declare function removeEventListener(type: string, listener?: EventListenerOrEventListenerObject, options?: boolean | EventListenerOptions): void;
+declare function clearInterval(handle: number): void;
+declare function clearTimeout(handle: number): void;
+declare function setInterval(handler: (...args: any[]) => void, timeout: number): number;
+declare function setInterval(handler: any, timeout?: any, ...args: any[]): number;
+declare function setTimeout(handler: (...args: any[]) => void, timeout: number): number;
+declare function setTimeout(handler: any, timeout?: any, ...args: any[]): number;
+declare function clearImmediate(handle: number): void;
+declare function setImmediate(handler: (...args: any[]) => void): number;
+declare function setImmediate(handler: any, ...args: any[]): number;
+declare var sessionStorage: Storage;
+declare var localStorage: Storage;
+declare var console: Console;
+declare var onpointercancel: (this: Window, ev: PointerEvent) => any;
+declare var onpointerdown: (this: Window, ev: PointerEvent) => any;
+declare var onpointerenter: (this: Window, ev: PointerEvent) => any;
+declare var onpointerleave: (this: Window, ev: PointerEvent) => any;
+declare var onpointermove: (this: Window, ev: PointerEvent) => any;
+declare var onpointerout: (this: Window, ev: PointerEvent) => any;
+declare var onpointerover: (this: Window, ev: PointerEvent) => any;
+declare var onpointerup: (this: Window, ev: PointerEvent) => any;
+declare var onwheel: (this: Window, ev: WheelEvent) => any;
+declare var indexedDB: IDBFactory;
+declare function atob(encodedString: string): string;
+declare function btoa(rawString: string): string;
+declare function fetch(input: RequestInfo, init?: RequestInit): Promise<Response>;
+declare function addEventListener<K extends keyof WindowEventMap>(type: K, listener: (this: Window, ev: WindowEventMap[K]) => any, useCapture?: boolean): void;
+declare function addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+type AAGUID = string;
+type AlgorithmIdentifier = string | Algorithm;
+type BodyInit = any;
+type ByteString = string;
+type ConstrainBoolean = boolean | ConstrainBooleanParameters;
+type ConstrainDOMString = string | string[] | ConstrainDOMStringParameters;
+type ConstrainDouble = number | ConstrainDoubleRange;
+type ConstrainLong = number | ConstrainLongRange;
+type CryptoOperationData = ArrayBufferView;
+type GLbitfield = number;
+type GLboolean = boolean;
+type GLbyte = number;
+type GLclampf = number;
+type GLenum = number;
+type GLfloat = number;
+type GLint = number;
+type GLintptr = number;
+type GLshort = number;
+type GLsizei = number;
+type GLsizeiptr = number;
+type GLubyte = number;
+type GLuint = number;
+type GLushort = number;
+type HeadersInit = any;
+type IDBKeyPath = string;
+type KeyFormat = string;
+type KeyType = string;
+type KeyUsage = string;
+type MSInboundPayload = MSVideoRecvPayload | MSAudioRecvPayload;
+type MSLocalClientEvent = MSLocalClientEventBase | MSAudioLocalClientEvent;
+type MSOutboundPayload = MSVideoSendPayload | MSAudioSendPayload;
+type RTCIceGatherCandidate = RTCIceCandidateDictionary | RTCIceCandidateComplete;
+type RTCTransport = RTCDtlsTransport | RTCSrtpSdesTransport;
+type RequestInfo = Request | string;
+type USVString = string;
+type payloadtype = number;
+type ScrollBehavior = "auto" | "instant" | "smooth";
+type ScrollLogicalPosition = "start" | "center" | "end" | "nearest";
+type IDBValidKey = number | string | Date | IDBArrayKey;
+type BufferSource = ArrayBuffer | ArrayBufferView;
+type MouseWheelEvent = WheelEvent;
+type ScrollRestoration = "auto" | "manual";
+type FormDataEntryValue = string | File;
+type InsertPosition = "beforebegin" | "afterbegin" | "beforeend" | "afterend";
+type AppendMode = "segments" | "sequence";
+type AudioContextState = "suspended" | "running" | "closed";
+type BiquadFilterType = "lowpass" | "highpass" | "bandpass" | "lowshelf" | "highshelf" | "peaking" | "notch" | "allpass";
+type CanvasFillRule = "nonzero" | "evenodd";
+type ChannelCountMode = "max" | "clamped-max" | "explicit";
+type ChannelInterpretation = "speakers" | "discrete";
+type DistanceModelType = "linear" | "inverse" | "exponential";
+type ExpandGranularity = "character" | "word" | "sentence" | "textedit";
+type GamepadInputEmulationType = "mouse" | "keyboard" | "gamepad";
+type IDBCursorDirection = "next" | "nextunique" | "prev" | "prevunique";
+type IDBRequestReadyState = "pending" | "done";
+type IDBTransactionMode = "readonly" | "readwrite" | "versionchange";
+type ListeningState = "inactive" | "active" | "disambiguation";
+type MediaDeviceKind = "audioinput" | "audiooutput" | "videoinput";
+type MediaKeyMessageType = "license-request" | "license-renewal" | "license-release" | "individualization-request";
+type MediaKeySessionType = "temporary" | "persistent-license" | "persistent-release-message";
+type MediaKeysRequirement = "required" | "optional" | "not-allowed";
+type MediaKeyStatus = "usable" | "expired" | "output-downscaled" | "output-not-allowed" | "status-pending" | "internal-error";
+type MediaStreamTrackState = "live" | "ended";
+type MSCredentialType = "FIDO_2_0";
+type MSIceAddrType = "os" | "stun" | "turn" | "peer-derived";
+type MSIceType = "failed" | "direct" | "relay";
+type MSStatsType = "description" | "localclientevent" | "inbound-network" | "outbound-network" | "inbound-payload" | "outbound-payload" | "transportdiagnostics";
+type MSTransportType = "Embedded" | "USB" | "NFC" | "BT";
+type MSWebViewPermissionState = "unknown" | "defer" | "allow" | "deny";
+type MSWebViewPermissionType = "geolocation" | "unlimitedIndexedDBQuota" | "media" | "pointerlock" | "webnotifications";
+type NavigationReason = "up" | "down" | "left" | "right";
+type NavigationType = "navigate" | "reload" | "back_forward" | "prerender";
+type NotificationDirection = "auto" | "ltr" | "rtl";
+type NotificationPermission = "default" | "denied" | "granted";
+type OscillatorType = "sine" | "square" | "sawtooth" | "triangle" | "custom";
+type OverSampleType = "none" | "2x" | "4x";
+type PanningModelType = "equalpower";
+type PaymentComplete = "success" | "fail" | "";
+type PaymentShippingType = "shipping" | "delivery" | "pickup";
+type PushEncryptionKeyName = "p256dh" | "auth";
+type PushPermissionState = "granted" | "denied" | "prompt";
+type ReferrerPolicy = "" | "no-referrer" | "no-referrer-when-downgrade" | "origin-only" | "origin-when-cross-origin" | "unsafe-url";
+type RequestCache = "default" | "no-store" | "reload" | "no-cache" | "force-cache";
+type RequestCredentials = "omit" | "same-origin" | "include";
+type RequestDestination = "" | "document" | "sharedworker" | "subresource" | "unknown" | "worker";
+type RequestMode = "navigate" | "same-origin" | "no-cors" | "cors";
+type RequestRedirect = "follow" | "error" | "manual";
+type RequestType = "" | "audio" | "font" | "image" | "script" | "style" | "track" | "video";
+type ResponseType = "basic" | "cors" | "default" | "error" | "opaque" | "opaqueredirect";
+type RTCBundlePolicy = "balanced" | "max-compat" | "max-bundle";
+type RTCDegradationPreference = "maintain-framerate" | "maintain-resolution" | "balanced";
+type RTCDtlsRole = "auto" | "client" | "server";
+type RTCDtlsTransportState = "new" | "connecting" | "connected" | "closed";
+type RTCIceCandidateType = "host" | "srflx" | "prflx" | "relay";
+type RTCIceComponent = "RTP" | "RTCP";
+type RTCIceConnectionState = "new" | "checking" | "connected" | "completed" | "failed" | "disconnected" | "closed";
+type RTCIceGathererState = "new" | "gathering" | "complete";
+type RTCIceGatheringState = "new" | "gathering" | "complete";
+type RTCIceGatherPolicy = "all" | "nohost" | "relay";
+type RTCIceProtocol = "udp" | "tcp";
+type RTCIceRole = "controlling" | "controlled";
+type RTCIceTcpCandidateType = "active" | "passive" | "so";
+type RTCIceTransportPolicy = "none" | "relay" | "all";
+type RTCIceTransportState = "new" | "checking" | "connected" | "completed" | "disconnected" | "closed";
+type RTCSdpType = "offer" | "pranswer" | "answer";
+type RTCSignalingState = "stable" | "have-local-offer" | "have-remote-offer" | "have-local-pranswer" | "have-remote-pranswer" | "closed";
+type RTCStatsIceCandidatePairState = "frozen" | "waiting" | "inprogress" | "failed" | "succeeded" | "cancelled";
+type RTCStatsIceCandidateType = "host" | "serverreflexive" | "peerreflexive" | "relayed";
+type RTCStatsType = "inboundrtp" | "outboundrtp" | "session" | "datachannel" | "track" | "transport" | "candidatepair" | "localcandidate" | "remotecandidate";
+type ScopedCredentialType = "ScopedCred";
+type ServiceWorkerState = "installing" | "installed" | "activating" | "activated" | "redundant";
+type Transport = "usb" | "nfc" | "ble";
+type VideoFacingModeEnum = "user" | "environment" | "left" | "right";
+type VisibilityState = "hidden" | "visible" | "prerender" | "unloaded";
+type XMLHttpRequestResponseType = "" | "arraybuffer" | "blob" | "document" | "json" | "text";
+
+
+/////////////////////////////
+/// WorkerGlobalScope APIs
+/////////////////////////////
+// These are only available in a Web Worker
+declare function importScripts(...urls: string[]): void;
+
+
+
+
+/////////////////////////////
+/// Windows Script Host APIS
+/////////////////////////////
+
+
+interface ActiveXObject {
+    new (s: string): any;
+}
+declare var ActiveXObject: ActiveXObject;
+
+interface ITextWriter {
+    Write(s: string): void;
+    WriteLine(s: string): void;
+    Close(): void;
+}
+
+interface TextStreamBase {
+    /**
+     * The column number of the current character position in an input stream.
+     */
+    Column: number;
+
+    /**
+     * The current line number in an input stream.
+     */
+    Line: number;
+
+    /**
+     * Closes a text stream.
+     * It is not necessary to close standard streams; they close automatically when the process ends. If
+     * you close a standard stream, be aware that any other pointers to that standard stream become invalid.
+     */
+    Close(): void;
+}
+
+interface TextStreamWriter extends TextStreamBase {
+    /**
+     * Sends a string to an output stream.
+     */
+    Write(s: string): void;
+
+    /**
+     * Sends a specified number of blank lines (newline characters) to an output stream.
+     */
+    WriteBlankLines(intLines: number): void;
+
+    /**
+     * Sends a string followed by a newline character to an output stream.
+     */
+    WriteLine(s: string): void;
+}
+
+interface TextStreamReader extends TextStreamBase {
+    /**
+     * Returns a specified number of characters from an input stream, starting at the current pointer position.
+     * Does not return until the ENTER key is pressed.
+     * Can only be used on a stream in reading mode; causes an error in writing or appending mode.
+     */
+    Read(characters: number): string;
+
+    /**
+     * Returns all characters from an input stream.
+     * Can only be used on a stream in reading mode; causes an error in writing or appending mode.
+     */
+    ReadAll(): string;
+
+    /**
+     * Returns an entire line from an input stream.
+     * Although this method extracts the newline character, it does not add it to the returned string.
+     * Can only be used on a stream in reading mode; causes an error in writing or appending mode.
+     */
+    ReadLine(): string;
+
+    /**
+     * Skips a specified number of characters when reading from an input text stream.
+     * Can only be used on a stream in reading mode; causes an error in writing or appending mode.
+     * @param characters Positive number of characters to skip forward. (Backward skipping is not supported.)
+     */
+    Skip(characters: number): void;
+
+    /**
+     * Skips the next line when reading from an input text stream.
+     * Can only be used on a stream in reading mode, not writing or appending mode.
+     */
+    SkipLine(): void;
+
+    /**
+     * Indicates whether the stream pointer position is at the end of a line.
+     */
+    AtEndOfLine: boolean;
+
+    /**
+     * Indicates whether the stream pointer position is at the end of a stream.
+     */
+    AtEndOfStream: boolean;
+}
+
+declare var WScript: {
+    /**
+     * Outputs text to either a message box (under WScript.exe) or the command console window followed by
+     * a newline (under CScript.exe).
+     */
+    Echo(s: any): void;
+
+    /**
+     * Exposes the write-only error output stream for the current script.
+     * Can be accessed only while using CScript.exe.
+     */
+    StdErr: TextStreamWriter;
+
+    /**
+     * Exposes the write-only output stream for the current script.
+     * Can be accessed only while using CScript.exe.
+     */
+    StdOut: TextStreamWriter;
+    Arguments: { length: number; Item(n: number): string; };
+
+    /**
+     *  The full path of the currently running script.
+     */
+    ScriptFullName: string;
+
+    /**
+     * Forces the script to stop immediately, with an optional exit code.
+     */
+    Quit(exitCode?: number): number;
+
+    /**
+     * The Windows Script Host build version number.
+     */
+    BuildVersion: number;
+
+    /**
+     * Fully qualified path of the host executable.
+     */
+    FullName: string;
+
+    /**
+     * Gets/sets the script mode - interactive(true) or batch(false).
+     */
+    Interactive: boolean;
+
+    /**
+     * The name of the host executable (WScript.exe or CScript.exe).
+     */
+    Name: string;
+
+    /**
+     * Path of the directory containing the host executable.
+     */
+    Path: string;
+
+    /**
+     * The filename of the currently running script.
+     */
+    ScriptName: string;
+
+    /**
+     * Exposes the read-only input stream for the current script.
+     * Can be accessed only while using CScript.exe.
+     */
+    StdIn: TextStreamReader;
+
+    /**
+     * Windows Script Host version
+     */
+    Version: string;
+
+    /**
+     * Connects a COM object's event sources to functions named with a given prefix, in the form prefix_event.
+     */
+    ConnectObject(objEventSource: any, strPrefix: string): void;
+
+    /**
+     * Creates a COM object.
+     * @param strProgiID
+     * @param strPrefix Function names in the form prefix_event will be bound to this object's COM events.
+     */
+    CreateObject(strProgID: string, strPrefix?: string): any;
+
+    /**
+     * Disconnects a COM object from its event sources.
+     */
+    DisconnectObject(obj: any): void;
+
+    /**
+     * Retrieves an existing object with the specified ProgID from memory, or creates a new one from a file.
+     * @param strPathname Fully qualified path to the file containing the object persisted to disk.
+     *                       For objects in memory, pass a zero-length string.
+     * @param strProgID
+     * @param strPrefix Function names in the form prefix_event will be bound to this object's COM events.
+     */
+    GetObject(strPathname: string, strProgID?: string, strPrefix?: string): any;
+
+    /**
+     * Suspends script execution for a specified length of time, then continues execution.
+     * @param intTime Interval (in milliseconds) to suspend script execution.
+     */
+    Sleep(intTime: number): void;
+};
+
+/**
+ * Allows enumerating over a COM collection, which may not have indexed item access.
+ */
+interface Enumerator<T> {
+    /**
+     * Returns true if the current item is the last one in the collection, or the collection is empty,
+     * or the current item is undefined.
+     */
+    atEnd(): boolean;
+
+    /**
+     * Returns the current item in the collection
+     */
+    item(): T;
+
+    /**
+     * Resets the current item in the collection to the first item. If there are no items in the collection,
+     * the current item is set to undefined.
+     */
+    moveFirst(): void;
+
+    /**
+     * Moves the current item to the next item in the collection. If the enumerator is at the end of
+     * the collection or the collection is empty, the current item is set to undefined.
+     */
+    moveNext(): void;
+}
+
+interface EnumeratorConstructor {
+    new <T>(collection: any): Enumerator<T>;
+    new (collection: any): Enumerator<any>;
+}
+
+declare var Enumerator: EnumeratorConstructor;
+
+/**
+ * Enables reading from a COM safe array, which might have an alternate lower bound, or multiple dimensions.
+ */
+interface VBArray<T> {
+    /**
+     * Returns the number of dimensions (1-based).
+     */
+    dimensions(): number;
+
+    /**
+     * Takes an index for each dimension in the array, and returns the item at the corresponding location.
+     */
+    getItem(dimension1Index: number, ...dimensionNIndexes: number[]): T;
+
+    /**
+     * Returns the smallest available index for a given dimension.
+     * @param dimension 1-based dimension (defaults to 1)
+     */
+    lbound(dimension?: number): number;
+
+    /**
+     * Returns the largest available index for a given dimension.
+     * @param dimension 1-based dimension (defaults to 1)
+     */
+    ubound(dimension?: number): number;
+
+    /**
+     * Returns a Javascript array with all the elements in the VBArray. If there are multiple dimensions,
+     * each successive dimension is appended to the end of the array.
+     * Example: [[1,2,3],[4,5,6]] becomes [1,2,3,4,5,6]
+     */
+    toArray(): T[];
+}
+
+interface VBArrayConstructor {
+    new <T>(safeArray: any): VBArray<T>;
+    new (safeArray: any): VBArray<any>;
+}
+
+declare var VBArray: VBArrayConstructor;
+
+/**
+ * Automation date (VT_DATE)
+ */
+interface VarDate { }
+
+interface DateConstructor {
+    new (vd: VarDate): Date;
+}
+
+interface Date {
+    getVarDate: () => VarDate;
+}
+
+
+/// <reference path="lib.dom.d.ts" />
+
+interface DOMTokenList {
+    [Symbol.iterator](): IterableIterator<string>;
+}
+
+interface FormData {
+    /**
+     * Returns an array of key, value pairs for every entry in the list
+     */
+    entries(): IterableIterator<[string, string | File]>;
+    /**
+     * Returns a list of keys in the list
+     */
+    keys(): IterableIterator<string>;
+    /**
+     * Returns a list of values in the list
+     */
+    values(): IterableIterator<string | File>;
+
+    [Symbol.iterator](): IterableIterator<string | File>;
+}
+
+interface Headers {
+    [Symbol.iterator](): IterableIterator<[string, string]>;
+    /**
+     * Returns an iterator allowing to go through all key/value pairs contained in this object.
+     */
+    entries(): IterableIterator<[string, string]>;
+    /**
+     * Returns an iterator allowing to go through all keys f the key/value pairs contained in this object.
+     */
+    keys(): IterableIterator<string>;
+    /**
+     * Returns an iterator allowing to go through all values of the key/value pairs contained in this object.
+     */
+    values(): IterableIterator<string>;
+}
+
+interface NodeList {
+    /**
+     * Returns an array of key, value pairs for every entry in the list
+     */
+    entries(): IterableIterator<[number, Node]>;
+    /**
+     * Performs the specified action for each node in an list.
+     * @param callbackfn  A function that accepts up to three arguments. forEach calls the callbackfn function one time for each element in the list.
+     * @param thisArg  An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
+     */
+    forEach(callbackfn: (value: Node, index: number, listObj: NodeList) => void, thisArg?: any): void;
+    /**
+     * Returns an list of keys in the list
+     */
+    keys(): IterableIterator<number>;
+
+    /**
+     * Returns an list of values in the list
+     */
+    values(): IterableIterator<Node>;
+
+
+    [Symbol.iterator](): IterableIterator<Node>;
+}
+
+interface NodeListOf<TNode extends Node> {
+
+    /**
+     * Returns an array of key, value pairs for every entry in the list
+     */
+    entries(): IterableIterator<[number, TNode]>;
+
+    /**
+     * Performs the specified action for each node in an list.
+     * @param callbackfn  A function that accepts up to three arguments. forEach calls the callbackfn function one time for each element in the list.
+     * @param thisArg  An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
+     */
+    forEach(callbackfn: (value: TNode, index: number, listObj: NodeListOf<TNode>) => void, thisArg?: any): void;
+    /**
+     * Returns an list of keys in the list
+     */
+    keys(): IterableIterator<number>;
+    /**
+     * Returns an list of values in the list
+     */
+    values(): IterableIterator<TNode>;
+
+    [Symbol.iterator](): IterableIterator<TNode>;
+}
+
+interface URLSearchParams {
+    /**
+     * Returns an array of key, value pairs for every entry in the search params
+     */
+    entries(): IterableIterator<[string, string]>;
+    /**
+     * Returns a list of keys in the search params
+     */
+    keys(): IterableIterator<string>;
+    /**
+     * Returns a list of values in the search params
+     */
+    values(): IterableIterator<string>;
+    /**
+     * iterate over key/value pairs
+     */
+    [Symbol.iterator](): IterableIterator<[string, string]>;
+}
diff --git a/bin/lib.es2017.d.ts b/bin/lib.es2017.d.ts
index 24d2399..b887f51 100644
--- a/bin/lib.es2017.d.ts
+++ b/bin/lib.es2017.d.ts
@@ -1,19 +1,25 @@
-/*! *****************************************************************************
-Copyright (c) Microsoft Corporation. All rights reserved. 
-Licensed under the Apache License, Version 2.0 (the "License"); you may not use
-this file except in compliance with the License. You may obtain a copy of the
-License at http://www.apache.org/licenses/LICENSE-2.0  
- 
-THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
-WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
-MERCHANTABLITY OR NON-INFRINGEMENT. 
- 
-See the Apache Version 2.0 License for specific language governing permissions
-and limitations under the License.
-***************************************************************************** */
-
-/// <reference no-default-lib="true"/>
-/// <reference path="lib.es2016.d.ts" />
-/// <reference path="lib.es2017.object.d.ts" />
-/// <reference path="lib.es2017.sharedmemory.d.ts" />
\ No newline at end of file
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved. 
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0  
+ 
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
+MERCHANTABLITY OR NON-INFRINGEMENT. 
+ 
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+
+
+
+/// <reference no-default-lib="true"/>
+
+
+/// <reference path="lib.es2016.d.ts" />
+/// <reference path="lib.es2017.object.d.ts" />
+/// <reference path="lib.es2017.sharedmemory.d.ts" />
+/// <reference path="lib.es2017.string.d.ts" />
+/// <reference path="lib.es2017.intl.d.ts" />
diff --git a/bin/lib.es2017.full.d.ts b/bin/lib.es2017.full.d.ts
new file mode 100644
index 0000000..6c2f260
--- /dev/null
+++ b/bin/lib.es2017.full.d.ts
@@ -0,0 +1,15220 @@
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved. 
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0  
+ 
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
+MERCHANTABLITY OR NON-INFRINGEMENT. 
+ 
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+
+
+
+/// <reference no-default-lib="true"/>
+
+
+/// <reference path="lib.es2016.d.ts" />
+/// <reference path="lib.es2017.object.d.ts" />
+/// <reference path="lib.es2017.sharedmemory.d.ts" />
+/// <reference path="lib.es2017.string.d.ts" />
+/// <reference path="lib.es2017.intl.d.ts" />
+
+
+
+/////////////////////////////
+/// DOM APIs
+/////////////////////////////
+
+interface Account {
+    displayName?: string;
+    id?: string;
+    imageURL?: string;
+    name?: string;
+    rpDisplayName?: string;
+}
+
+interface Algorithm {
+    name: string;
+}
+
+interface AnimationEventInit extends EventInit {
+    animationName?: string;
+    elapsedTime?: number;
+}
+
+interface AssertionOptions {
+    allowList?: ScopedCredentialDescriptor[];
+    extensions?: WebAuthnExtensions;
+    rpId?: USVString;
+    timeoutSeconds?: number;
+}
+
+interface CacheQueryOptions {
+    cacheName?: string;
+    ignoreMethod?: boolean;
+    ignoreSearch?: boolean;
+    ignoreVary?: boolean;
+}
+
+interface ClientData {
+    challenge?: string;
+    extensions?: WebAuthnExtensions;
+    hashAlg?: string | Algorithm;
+    origin?: string;
+    rpId?: string;
+    tokenBinding?: string;
+}
+
+interface CloseEventInit extends EventInit {
+    code?: number;
+    reason?: string;
+    wasClean?: boolean;
+}
+
+interface CompositionEventInit extends UIEventInit {
+    data?: string;
+}
+
+interface ConfirmSiteSpecificExceptionsInformation extends ExceptionInformation {
+    arrayOfDomainStrings?: string[];
+}
+
+interface ConstrainBooleanParameters {
+    exact?: boolean;
+    ideal?: boolean;
+}
+
+interface ConstrainDOMStringParameters {
+    exact?: string | string[];
+    ideal?: string | string[];
+}
+
+interface ConstrainDoubleRange extends DoubleRange {
+    exact?: number;
+    ideal?: number;
+}
+
+interface ConstrainLongRange extends LongRange {
+    exact?: number;
+    ideal?: number;
+}
+
+interface ConstrainVideoFacingModeParameters {
+    exact?: VideoFacingModeEnum | VideoFacingModeEnum[];
+    ideal?: VideoFacingModeEnum | VideoFacingModeEnum[];
+}
+
+interface CustomEventInit extends EventInit {
+    detail?: any;
+}
+
+interface DeviceAccelerationDict {
+    x?: number;
+    y?: number;
+    z?: number;
+}
+
+interface DeviceLightEventInit extends EventInit {
+    value?: number;
+}
+
+interface DeviceMotionEventInit extends EventInit {
+    acceleration?: DeviceAccelerationDict;
+    accelerationIncludingGravity?: DeviceAccelerationDict;
+    interval?: number;
+    rotationRate?: DeviceRotationRateDict;
+}
+
+interface DeviceOrientationEventInit extends EventInit {
+    absolute?: boolean;
+    alpha?: number;
+    beta?: number;
+    gamma?: number;
+}
+
+interface DeviceRotationRateDict {
+    alpha?: number;
+    beta?: number;
+    gamma?: number;
+}
+
+interface DOMRectInit {
+    height?: any;
+    width?: any;
+    x?: any;
+    y?: any;
+}
+
+interface DoubleRange {
+    max?: number;
+    min?: number;
+}
+
+interface ErrorEventInit extends EventInit {
+    colno?: number;
+    error?: any;
+    filename?: string;
+    lineno?: number;
+    message?: string;
+}
+
+interface EventInit {
+    scoped?: boolean;
+    bubbles?: boolean;
+    cancelable?: boolean;
+}
+
+interface EventModifierInit extends UIEventInit {
+    altKey?: boolean;
+    ctrlKey?: boolean;
+    metaKey?: boolean;
+    modifierAltGraph?: boolean;
+    modifierCapsLock?: boolean;
+    modifierFn?: boolean;
+    modifierFnLock?: boolean;
+    modifierHyper?: boolean;
+    modifierNumLock?: boolean;
+    modifierOS?: boolean;
+    modifierScrollLock?: boolean;
+    modifierSuper?: boolean;
+    modifierSymbol?: boolean;
+    modifierSymbolLock?: boolean;
+    shiftKey?: boolean;
+}
+
+interface ExceptionInformation {
+    domain?: string;
+}
+
+interface FocusEventInit extends UIEventInit {
+    relatedTarget?: EventTarget;
+}
+
+interface FocusNavigationEventInit extends EventInit {
+    navigationReason?: string;
+    originHeight?: number;
+    originLeft?: number;
+    originTop?: number;
+    originWidth?: number;
+}
+
+interface FocusNavigationOrigin {
+    originHeight?: number;
+    originLeft?: number;
+    originTop?: number;
+    originWidth?: number;
+}
+
+interface GamepadEventInit extends EventInit {
+    gamepad?: Gamepad;
+}
+
+interface GetNotificationOptions {
+    tag?: string;
+}
+
+interface HashChangeEventInit extends EventInit {
+    newURL?: string;
+    oldURL?: string;
+}
+
+interface IDBIndexParameters {
+    multiEntry?: boolean;
+    unique?: boolean;
+}
+
+interface IDBObjectStoreParameters {
+    autoIncrement?: boolean;
+    keyPath?: IDBKeyPath;
+}
+
+interface IntersectionObserverEntryInit {
+    boundingClientRect?: DOMRectInit;
+    intersectionRect?: DOMRectInit;
+    rootBounds?: DOMRectInit;
+    target?: Element;
+    time?: number;
+}
+
+interface IntersectionObserverInit {
+    root?: Element;
+    rootMargin?: string;
+    threshold?: number | number[];
+}
+
+interface KeyAlgorithm {
+    name?: string;
+}
+
+interface KeyboardEventInit extends EventModifierInit {
+    code?: string;
+    key?: string;
+    location?: number;
+    repeat?: boolean;
+}
+
+interface LongRange {
+    max?: number;
+    min?: number;
+}
+
+interface MediaEncryptedEventInit extends EventInit {
+    initData?: ArrayBuffer;
+    initDataType?: string;
+}
+
+interface MediaKeyMessageEventInit extends EventInit {
+    message?: ArrayBuffer;
+    messageType?: MediaKeyMessageType;
+}
+
+interface MediaKeySystemConfiguration {
+    audioCapabilities?: MediaKeySystemMediaCapability[];
+    distinctiveIdentifier?: MediaKeysRequirement;
+    initDataTypes?: string[];
+    persistentState?: MediaKeysRequirement;
+    videoCapabilities?: MediaKeySystemMediaCapability[];
+}
+
+interface MediaKeySystemMediaCapability {
+    contentType?: string;
+    robustness?: string;
+}
+
+interface MediaStreamConstraints {
+    audio?: boolean | MediaTrackConstraints;
+    video?: boolean | MediaTrackConstraints;
+}
+
+interface MediaStreamErrorEventInit extends EventInit {
+    error?: MediaStreamError;
+}
+
+interface MediaStreamEventInit extends EventInit {
+    stream?: MediaStream;
+}
+
+interface MediaStreamTrackEventInit extends EventInit {
+    track?: MediaStreamTrack;
+}
+
+interface MediaTrackCapabilities {
+    aspectRatio?: number | DoubleRange;
+    deviceId?: string;
+    echoCancellation?: boolean[];
+    facingMode?: string;
+    frameRate?: number | DoubleRange;
+    groupId?: string;
+    height?: number | LongRange;
+    sampleRate?: number | LongRange;
+    sampleSize?: number | LongRange;
+    volume?: number | DoubleRange;
+    width?: number | LongRange;
+}
+
+interface MediaTrackConstraints extends MediaTrackConstraintSet {
+    advanced?: MediaTrackConstraintSet[];
+}
+
+interface MediaTrackConstraintSet {
+    aspectRatio?: number | ConstrainDoubleRange;
+    deviceId?: string | string[] | ConstrainDOMStringParameters;
+    echoCancelation?: boolean | ConstrainBooleanParameters;
+    facingMode?: string | string[] | ConstrainDOMStringParameters;
+    frameRate?: number | ConstrainDoubleRange;
+    groupId?: string | string[] | ConstrainDOMStringParameters;
+    height?: number | ConstrainLongRange;
+    sampleRate?: number | ConstrainLongRange;
+    sampleSize?: number | ConstrainLongRange;
+    volume?: number | ConstrainDoubleRange;
+    width?: number | ConstrainLongRange;
+}
+
+interface MediaTrackSettings {
+    aspectRatio?: number;
+    deviceId?: string;
+    echoCancellation?: boolean;
+    facingMode?: string;
+    frameRate?: number;
+    groupId?: string;
+    height?: number;
+    sampleRate?: number;
+    sampleSize?: number;
+    volume?: number;
+    width?: number;
+}
+
+interface MediaTrackSupportedConstraints {
+    aspectRatio?: boolean;
+    deviceId?: boolean;
+    echoCancellation?: boolean;
+    facingMode?: boolean;
+    frameRate?: boolean;
+    groupId?: boolean;
+    height?: boolean;
+    sampleRate?: boolean;
+    sampleSize?: boolean;
+    volume?: boolean;
+    width?: boolean;
+}
+
+interface MessageEventInit extends EventInit {
+    lastEventId?: string;
+    channel?: string;
+    data?: any;
+    origin?: string;
+    ports?: MessagePort[];
+    source?: Window;
+}
+
+interface MouseEventInit extends EventModifierInit {
+    button?: number;
+    buttons?: number;
+    clientX?: number;
+    clientY?: number;
+    relatedTarget?: EventTarget;
+    screenX?: number;
+    screenY?: number;
+}
+
+interface MSAccountInfo {
+    accountImageUri?: string;
+    accountName?: string;
+    rpDisplayName?: string;
+    userDisplayName?: string;
+    userId?: string;
+}
+
+interface MSAudioLocalClientEvent extends MSLocalClientEventBase {
+    cpuInsufficientEventRatio?: number;
+    deviceCaptureNotFunctioningEventRatio?: number;
+    deviceClippingEventRatio?: number;
+    deviceEchoEventRatio?: number;
+    deviceGlitchesEventRatio?: number;
+    deviceHalfDuplexAECEventRatio?: number;
+    deviceHowlingEventCount?: number;
+    deviceLowSNREventRatio?: number;
+    deviceLowSpeechLevelEventRatio?: number;
+    deviceMultipleEndpointsEventCount?: number;
+    deviceNearEndToEchoRatioEventRatio?: number;
+    deviceRenderMuteEventRatio?: number;
+    deviceRenderNotFunctioningEventRatio?: number;
+    deviceRenderZeroVolumeEventRatio?: number;
+    networkDelayEventRatio?: number;
+    networkSendQualityEventRatio?: number;
+}
+
+interface MSAudioRecvPayload extends MSPayloadBase {
+    burstLossLength1?: number;
+    burstLossLength2?: number;
+    burstLossLength3?: number;
+    burstLossLength4?: number;
+    burstLossLength5?: number;
+    burstLossLength6?: number;
+    burstLossLength7?: number;
+    burstLossLength8OrHigher?: number;
+    fecRecvDistance1?: number;
+    fecRecvDistance2?: number;
+    fecRecvDistance3?: number;
+    packetReorderDepthAvg?: number;
+    packetReorderDepthMax?: number;
+    packetReorderRatio?: number;
+    ratioCompressedSamplesAvg?: number;
+    ratioConcealedSamplesAvg?: number;
+    ratioStretchedSamplesAvg?: number;
+    samplingRate?: number;
+    signal?: MSAudioRecvSignal;
+}
+
+interface MSAudioRecvSignal {
+    initialSignalLevelRMS?: number;
+    recvNoiseLevelCh1?: number;
+    recvSignalLevelCh1?: number;
+    renderLoopbackSignalLevel?: number;
+    renderNoiseLevel?: number;
+    renderSignalLevel?: number;
+}
+
+interface MSAudioSendPayload extends MSPayloadBase {
+    audioFECUsed?: boolean;
+    samplingRate?: number;
+    sendMutePercent?: number;
+    signal?: MSAudioSendSignal;
+}
+
+interface MSAudioSendSignal {
+    noiseLevel?: number;
+    sendNoiseLevelCh1?: number;
+    sendSignalLevelCh1?: number;
+}
+
+interface MSConnectivity {
+    iceType?: MSIceType;
+    iceWarningFlags?: MSIceWarningFlags;
+    relayAddress?: MSRelayAddress;
+}
+
+interface MSCredentialFilter {
+    accept?: MSCredentialSpec[];
+}
+
+interface MSCredentialParameters {
+    type?: MSCredentialType;
+}
+
+interface MSCredentialSpec {
+    id?: string;
+    type?: MSCredentialType;
+}
+
+interface MSDelay {
+    roundTrip?: number;
+    roundTripMax?: number;
+}
+
+interface MSDescription extends RTCStats {
+    connectivity?: MSConnectivity;
+    deviceDevName?: string;
+    localAddr?: MSIPAddressInfo;
+    networkconnectivity?: MSNetworkConnectivityInfo;
+    reflexiveLocalIPAddr?: MSIPAddressInfo;
+    remoteAddr?: MSIPAddressInfo;
+    transport?: RTCIceProtocol;
+}
+
+interface MSFIDOCredentialParameters extends MSCredentialParameters {
+    algorithm?: string | Algorithm;
+    authenticators?: AAGUID[];
+}
+
+interface MSIceWarningFlags {
+    allocationMessageIntegrityFailed?: boolean;
+    alternateServerReceived?: boolean;
+    connCheckMessageIntegrityFailed?: boolean;
+    connCheckOtherError?: boolean;
+    fipsAllocationFailure?: boolean;
+    multipleRelayServersAttempted?: boolean;
+    noRelayServersConfigured?: boolean;
+    portRangeExhausted?: boolean;
+    pseudoTLSFailure?: boolean;
+    tcpNatConnectivityFailed?: boolean;
+    tcpRelayConnectivityFailed?: boolean;
+    turnAuthUnknownUsernameError?: boolean;
+    turnTcpAllocateFailed?: boolean;
+    turnTcpSendFailed?: boolean;
+    turnTcpTimedOut?: boolean;
+    turnTurnTcpConnectivityFailed?: boolean;
+    turnUdpAllocateFailed?: boolean;
+    turnUdpSendFailed?: boolean;
+    udpLocalConnectivityFailed?: boolean;
+    udpNatConnectivityFailed?: boolean;
+    udpRelayConnectivityFailed?: boolean;
+    useCandidateChecksFailed?: boolean;
+}
+
+interface MSIPAddressInfo {
+    ipAddr?: string;
+    manufacturerMacAddrMask?: string;
+    port?: number;
+}
+
+interface MSJitter {
+    interArrival?: number;
+    interArrivalMax?: number;
+    interArrivalSD?: number;
+}
+
+interface MSLocalClientEventBase extends RTCStats {
+    networkBandwidthLowEventRatio?: number;
+    networkReceiveQualityEventRatio?: number;
+}
+
+interface MSNetwork extends RTCStats {
+    delay?: MSDelay;
+    jitter?: MSJitter;
+    packetLoss?: MSPacketLoss;
+    utilization?: MSUtilization;
+}
+
+interface MSNetworkConnectivityInfo {
+    linkspeed?: number;
+    networkConnectionDetails?: string;
+    vpn?: boolean;
+}
+
+interface MSNetworkInterfaceType {
+    interfaceTypeEthernet?: boolean;
+    interfaceTypePPP?: boolean;
+    interfaceTypeTunnel?: boolean;
+    interfaceTypeWireless?: boolean;
+    interfaceTypeWWAN?: boolean;
+}
+
+interface MSOutboundNetwork extends MSNetwork {
+    appliedBandwidthLimit?: number;
+}
+
+interface MSPacketLoss {
+    lossRate?: number;
+    lossRateMax?: number;
+}
+
+interface MSPayloadBase extends RTCStats {
+    payloadDescription?: string;
+}
+
+interface MSPortRange {
+    max?: number;
+    min?: number;
+}
+
+interface MSRelayAddress {
+    port?: number;
+    relayAddress?: string;
+}
+
+interface MSSignatureParameters {
+    userPrompt?: string;
+}
+
+interface MSTransportDiagnosticsStats extends RTCStats {
+    allocationTimeInMs?: number;
+    baseAddress?: string;
+    baseInterface?: MSNetworkInterfaceType;
+    iceRole?: RTCIceRole;
+    iceWarningFlags?: MSIceWarningFlags;
+    interfaces?: MSNetworkInterfaceType;
+    localAddress?: string;
+    localAddrType?: MSIceAddrType;
+    localInterface?: MSNetworkInterfaceType;
+    localMR?: string;
+    localMRTCPPort?: number;
+    localSite?: string;
+    msRtcEngineVersion?: string;
+    networkName?: string;
+    numConsentReqReceived?: number;
+    numConsentReqSent?: number;
+    numConsentRespReceived?: number;
+    numConsentRespSent?: number;
+    portRangeMax?: number;
+    portRangeMin?: number;
+    protocol?: RTCIceProtocol;
+    remoteAddress?: string;
+    remoteAddrType?: MSIceAddrType;
+    remoteMR?: string;
+    remoteMRTCPPort?: number;
+    remoteSite?: string;
+    rtpRtcpMux?: boolean;
+    stunVer?: number;
+}
+
+interface MSUtilization {
+    bandwidthEstimation?: number;
+    bandwidthEstimationAvg?: number;
+    bandwidthEstimationMax?: number;
+    bandwidthEstimationMin?: number;
+    bandwidthEstimationStdDev?: number;
+    packets?: number;
+}
+
+interface MSVideoPayload extends MSPayloadBase {
+    durationSeconds?: number;
+    resolution?: string;
+    videoBitRateAvg?: number;
+    videoBitRateMax?: number;
+    videoFrameRateAvg?: number;
+    videoPacketLossRate?: number;
+}
+
+interface MSVideoRecvPayload extends MSVideoPayload {
+    lowBitRateCallPercent?: number;
+    lowFrameRateCallPercent?: number;
+    recvBitRateAverage?: number;
+    recvBitRateMaximum?: number;
+    recvCodecType?: string;
+    recvFpsHarmonicAverage?: number;
+    recvFrameRateAverage?: number;
+    recvNumResSwitches?: number;
+    recvReorderBufferMaxSuccessfullyOrderedExtent?: number;
+    recvReorderBufferMaxSuccessfullyOrderedLateTime?: number;
+    recvReorderBufferPacketsDroppedDueToBufferExhaustion?: number;
+    recvReorderBufferPacketsDroppedDueToTimeout?: number;
+    recvReorderBufferReorderedPackets?: number;
+    recvResolutionHeight?: number;
+    recvResolutionWidth?: number;
+    recvVideoStreamsMax?: number;
+    recvVideoStreamsMin?: number;
+    recvVideoStreamsMode?: number;
+    reorderBufferTotalPackets?: number;
+    videoFrameLossRate?: number;
+    videoPostFECPLR?: number;
+    videoResolutions?: MSVideoResolutionDistribution;
+}
+
+interface MSVideoResolutionDistribution {
+    cifQuality?: number;
+    h1080Quality?: number;
+    h1440Quality?: number;
+    h2160Quality?: number;
+    h720Quality?: number;
+    vgaQuality?: number;
+}
+
+interface MSVideoSendPayload extends MSVideoPayload {
+    sendBitRateAverage?: number;
+    sendBitRateMaximum?: number;
+    sendFrameRateAverage?: number;
+    sendResolutionHeight?: number;
+    sendResolutionWidth?: number;
+    sendVideoStreamsMax?: number;
+}
+
+interface MsZoomToOptions {
+    animate?: string;
+    contentX?: number;
+    contentY?: number;
+    scaleFactor?: number;
+    viewportX?: string;
+    viewportY?: string;
+}
+
+interface MutationObserverInit {
+    attributeFilter?: string[];
+    attributeOldValue?: boolean;
+    attributes?: boolean;
+    characterData?: boolean;
+    characterDataOldValue?: boolean;
+    childList?: boolean;
+    subtree?: boolean;
+}
+
+interface NotificationOptions {
+    body?: string;
+    dir?: NotificationDirection;
+    icon?: string;
+    lang?: string;
+    tag?: string;
+}
+
+interface ObjectURLOptions {
+    oneTimeOnly?: boolean;
+}
+
+interface PaymentCurrencyAmount {
+    currency?: string;
+    currencySystem?: string;
+    value?: string;
+}
+
+interface PaymentDetails {
+    displayItems?: PaymentItem[];
+    error?: string;
+    modifiers?: PaymentDetailsModifier[];
+    shippingOptions?: PaymentShippingOption[];
+    total?: PaymentItem;
+}
+
+interface PaymentDetailsModifier {
+    additionalDisplayItems?: PaymentItem[];
+    data?: any;
+    supportedMethods?: string[];
+    total?: PaymentItem;
+}
+
+interface PaymentItem {
+    amount?: PaymentCurrencyAmount;
+    label?: string;
+    pending?: boolean;
+}
+
+interface PaymentMethodData {
+    data?: any;
+    supportedMethods?: string[];
+}
+
+interface PaymentOptions {
+    requestPayerEmail?: boolean;
+    requestPayerName?: boolean;
+    requestPayerPhone?: boolean;
+    requestShipping?: boolean;
+    shippingType?: string;
+}
+
+interface PaymentRequestUpdateEventInit extends EventInit {
+}
+
+interface PaymentShippingOption {
+    amount?: PaymentCurrencyAmount;
+    id?: string;
+    label?: string;
+    selected?: boolean;
+}
+
+interface PeriodicWaveConstraints {
+    disableNormalization?: boolean;
+}
+
+interface PointerEventInit extends MouseEventInit {
+    height?: number;
+    isPrimary?: boolean;
+    pointerId?: number;
+    pointerType?: string;
+    pressure?: number;
+    tiltX?: number;
+    tiltY?: number;
+    width?: number;
+}
+
+interface PopStateEventInit extends EventInit {
+    state?: any;
+}
+
+interface PositionOptions {
+    enableHighAccuracy?: boolean;
+    maximumAge?: number;
+    timeout?: number;
+}
+
+interface ProgressEventInit extends EventInit {
+    lengthComputable?: boolean;
+    loaded?: number;
+    total?: number;
+}
+
+interface PushSubscriptionOptionsInit {
+    applicationServerKey?: any;
+    userVisibleOnly?: boolean;
+}
+
+interface RegistrationOptions {
+    scope?: string;
+}
+
+interface RequestInit {
+    body?: any;
+    cache?: RequestCache;
+    credentials?: RequestCredentials;
+    headers?: any;
+    integrity?: string;
+    keepalive?: boolean;
+    method?: string;
+    mode?: RequestMode;
+    redirect?: RequestRedirect;
+    referrer?: string;
+    referrerPolicy?: ReferrerPolicy;
+    window?: any;
+}
+
+interface ResponseInit {
+    headers?: any;
+    status?: number;
+    statusText?: string;
+}
+
+interface RTCConfiguration {
+    bundlePolicy?: RTCBundlePolicy;
+    iceServers?: RTCIceServer[];
+    iceTransportPolicy?: RTCIceTransportPolicy;
+    peerIdentity?: string;
+}
+
+interface RTCDtlsFingerprint {
+    algorithm?: string;
+    value?: string;
+}
+
+interface RTCDtlsParameters {
+    fingerprints?: RTCDtlsFingerprint[];
+    role?: RTCDtlsRole;
+}
+
+interface RTCDTMFToneChangeEventInit extends EventInit {
+    tone?: string;
+}
+
+interface RTCIceCandidateAttributes extends RTCStats {
+    addressSourceUrl?: string;
+    candidateType?: RTCStatsIceCandidateType;
+    ipAddress?: string;
+    portNumber?: number;
+    priority?: number;
+    transport?: string;
+}
+
+interface RTCIceCandidateComplete {
+}
+
+interface RTCIceCandidateDictionary {
+    foundation?: string;
+    ip?: string;
+    msMTurnSessionId?: string;
+    port?: number;
+    priority?: number;
+    protocol?: RTCIceProtocol;
+    relatedAddress?: string;
+    relatedPort?: number;
+    tcpType?: RTCIceTcpCandidateType;
+    type?: RTCIceCandidateType;
+}
+
+interface RTCIceCandidateInit {
+    candidate?: string;
+    sdpMid?: string;
+    sdpMLineIndex?: number;
+}
+
+interface RTCIceCandidatePair {
+    local?: RTCIceCandidateDictionary;
+    remote?: RTCIceCandidateDictionary;
+}
+
+interface RTCIceCandidatePairStats extends RTCStats {
+    availableIncomingBitrate?: number;
+    availableOutgoingBitrate?: number;
+    bytesReceived?: number;
+    bytesSent?: number;
+    localCandidateId?: string;
+    nominated?: boolean;
+    priority?: number;
+    readable?: boolean;
+    remoteCandidateId?: string;
+    roundTripTime?: number;
+    state?: RTCStatsIceCandidatePairState;
+    transportId?: string;
+    writable?: boolean;
+}
+
+interface RTCIceGatherOptions {
+    gatherPolicy?: RTCIceGatherPolicy;
+    iceservers?: RTCIceServer[];
+    portRange?: MSPortRange;
+}
+
+interface RTCIceParameters {
+    iceLite?: boolean;
+    password?: string;
+    usernameFragment?: string;
+}
+
+interface RTCIceServer {
+    credential?: string;
+    urls?: any;
+    username?: string;
+}
+
+interface RTCInboundRTPStreamStats extends RTCRTPStreamStats {
+    bytesReceived?: number;
+    fractionLost?: number;
+    jitter?: number;
+    packetsLost?: number;
+    packetsReceived?: number;
+}
+
+interface RTCMediaStreamTrackStats extends RTCStats {
+    audioLevel?: number;
+    echoReturnLoss?: number;
+    echoReturnLossEnhancement?: number;
+    frameHeight?: number;
+    framesCorrupted?: number;
+    framesDecoded?: number;
+    framesDropped?: number;
+    framesPerSecond?: number;
+    framesReceived?: number;
+    framesSent?: number;
+    frameWidth?: number;
+    remoteSource?: boolean;
+    ssrcIds?: string[];
+    trackIdentifier?: string;
+}
+
+interface RTCOfferOptions {
+    iceRestart?: boolean;
+    offerToReceiveAudio?: number;
+    offerToReceiveVideo?: number;
+    voiceActivityDetection?: boolean;
+}
+
+interface RTCOutboundRTPStreamStats extends RTCRTPStreamStats {
+    bytesSent?: number;
+    packetsSent?: number;
+    roundTripTime?: number;
+    targetBitrate?: number;
+}
+
+interface RTCPeerConnectionIceEventInit extends EventInit {
+    candidate?: RTCIceCandidate;
+}
+
+interface RTCRtcpFeedback {
+    parameter?: string;
+    type?: string;
+}
+
+interface RTCRtcpParameters {
+    cname?: string;
+    mux?: boolean;
+    reducedSize?: boolean;
+    ssrc?: number;
+}
+
+interface RTCRtpCapabilities {
+    codecs?: RTCRtpCodecCapability[];
+    fecMechanisms?: string[];
+    headerExtensions?: RTCRtpHeaderExtension[];
+}
+
+interface RTCRtpCodecCapability {
+    clockRate?: number;
+    kind?: string;
+    maxptime?: number;
+    maxSpatialLayers?: number;
+    maxTemporalLayers?: number;
+    name?: string;
+    numChannels?: number;
+    options?: any;
+    parameters?: any;
+    preferredPayloadType?: number;
+    ptime?: number;
+    rtcpFeedback?: RTCRtcpFeedback[];
+    svcMultiStreamSupport?: boolean;
+}
+
+interface RTCRtpCodecParameters {
+    clockRate?: number;
+    maxptime?: number;
+    name?: string;
+    numChannels?: number;
+    parameters?: any;
+    payloadType?: any;
+    ptime?: number;
+    rtcpFeedback?: RTCRtcpFeedback[];
+}
+
+interface RTCRtpContributingSource {
+    audioLevel?: number;
+    csrc?: number;
+    timestamp?: number;
+}
+
+interface RTCRtpEncodingParameters {
+    active?: boolean;
+    codecPayloadType?: number;
+    dependencyEncodingIds?: string[];
+    encodingId?: string;
+    fec?: RTCRtpFecParameters;
+    framerateScale?: number;
+    maxBitrate?: number;
+    maxFramerate?: number;
+    minQuality?: number;
+    priority?: number;
+    resolutionScale?: number;
+    rtx?: RTCRtpRtxParameters;
+    ssrc?: number;
+    ssrcRange?: RTCSsrcRange;
+}
+
+interface RTCRtpFecParameters {
+    mechanism?: string;
+    ssrc?: number;
+}
+
+interface RTCRtpHeaderExtension {
+    kind?: string;
+    preferredEncrypt?: boolean;
+    preferredId?: number;
+    uri?: string;
+}
+
+interface RTCRtpHeaderExtensionParameters {
+    encrypt?: boolean;
+    id?: number;
+    uri?: string;
+}
+
+interface RTCRtpParameters {
+    codecs?: RTCRtpCodecParameters[];
+    degradationPreference?: RTCDegradationPreference;
+    encodings?: RTCRtpEncodingParameters[];
+    headerExtensions?: RTCRtpHeaderExtensionParameters[];
+    muxId?: string;
+    rtcp?: RTCRtcpParameters;
+}
+
+interface RTCRtpRtxParameters {
+    ssrc?: number;
+}
+
+interface RTCRTPStreamStats extends RTCStats {
+    associateStatsId?: string;
+    codecId?: string;
+    firCount?: number;
+    isRemote?: boolean;
+    mediaTrackId?: string;
+    nackCount?: number;
+    pliCount?: number;
+    sliCount?: number;
+    ssrc?: string;
+    transportId?: string;
+}
+
+interface RTCRtpUnhandled {
+    muxId?: string;
+    payloadType?: number;
+    ssrc?: number;
+}
+
+interface RTCSessionDescriptionInit {
+    sdp?: string;
+    type?: RTCSdpType;
+}
+
+interface RTCSrtpKeyParam {
+    keyMethod?: string;
+    keySalt?: string;
+    lifetime?: string;
+    mkiLength?: number;
+    mkiValue?: number;
+}
+
+interface RTCSrtpSdesParameters {
+    cryptoSuite?: string;
+    keyParams?: RTCSrtpKeyParam[];
+    sessionParams?: string[];
+    tag?: number;
+}
+
+interface RTCSsrcRange {
+    max?: number;
+    min?: number;
+}
+
+interface RTCStats {
+    id?: string;
+    msType?: MSStatsType;
+    timestamp?: number;
+    type?: RTCStatsType;
+}
+
+interface RTCStatsReport {
+}
+
+interface RTCTransportStats extends RTCStats {
+    activeConnection?: boolean;
+    bytesReceived?: number;
+    bytesSent?: number;
+    localCertificateId?: string;
+    remoteCertificateId?: string;
+    rtcpTransportStatsId?: string;
+    selectedCandidatePairId?: string;
+}
+
+interface ScopedCredentialDescriptor {
+    id?: any;
+    transports?: Transport[];
+    type?: ScopedCredentialType;
+}
+
+interface ScopedCredentialOptions {
+    excludeList?: ScopedCredentialDescriptor[];
+    extensions?: WebAuthnExtensions;
+    rpId?: USVString;
+    timeoutSeconds?: number;
+}
+
+interface ScopedCredentialParameters {
+    algorithm?: string | Algorithm;
+    type?: ScopedCredentialType;
+}
+
+interface ServiceWorkerMessageEventInit extends EventInit {
+    data?: any;
+    lastEventId?: string;
+    origin?: string;
+    ports?: MessagePort[];
+    source?: ServiceWorker | MessagePort;
+}
+
+interface SpeechSynthesisEventInit extends EventInit {
+    charIndex?: number;
+    elapsedTime?: number;
+    name?: string;
+    utterance?: SpeechSynthesisUtterance;
+}
+
+interface StoreExceptionsInformation extends ExceptionInformation {
+    detailURI?: string;
+    explanationString?: string;
+    siteName?: string;
+}
+
+interface StoreSiteSpecificExceptionsInformation extends StoreExceptionsInformation {
+    arrayOfDomainStrings?: string[];
+}
+
+interface TrackEventInit extends EventInit {
+    track?: VideoTrack | AudioTrack | TextTrack;
+}
+
+interface TransitionEventInit extends EventInit {
+    elapsedTime?: number;
+    propertyName?: string;
+}
+
+interface UIEventInit extends EventInit {
+    detail?: number;
+    view?: Window;
+}
+
+interface WebAuthnExtensions {
+}
+
+interface WebGLContextAttributes {
+    failIfMajorPerformanceCaveat?: boolean;
+    alpha?: boolean;
+    antialias?: boolean;
+    depth?: boolean;
+    premultipliedAlpha?: boolean;
+    preserveDrawingBuffer?: boolean;
+    stencil?: boolean;
+}
+
+interface WebGLContextEventInit extends EventInit {
+    statusMessage?: string;
+}
+
+interface WheelEventInit extends MouseEventInit {
+    deltaMode?: number;
+    deltaX?: number;
+    deltaY?: number;
+    deltaZ?: number;
+}
+
+interface EventListener {
+    (evt: Event): void;
+}
+
+interface WebKitEntriesCallback {
+    (evt: Event): void;
+}
+
+interface WebKitErrorCallback {
+    (evt: Event): void;
+}
+
+interface WebKitFileCallback {
+    (evt: Event): void;
+}
+
+interface AnalyserNode extends AudioNode {
+    fftSize: number;
+    readonly frequencyBinCount: number;
+    maxDecibels: number;
+    minDecibels: number;
+    smoothingTimeConstant: number;
+    getByteFrequencyData(array: Uint8Array): void;
+    getByteTimeDomainData(array: Uint8Array): void;
+    getFloatFrequencyData(array: Float32Array): void;
+    getFloatTimeDomainData(array: Float32Array): void;
+}
+
+declare var AnalyserNode: {
+    prototype: AnalyserNode;
+    new(): AnalyserNode;
+};
+
+interface ANGLE_instanced_arrays {
+    drawArraysInstancedANGLE(mode: number, first: number, count: number, primcount: number): void;
+    drawElementsInstancedANGLE(mode: number, count: number, type: number, offset: number, primcount: number): void;
+    vertexAttribDivisorANGLE(index: number, divisor: number): void;
+    readonly VERTEX_ATTRIB_ARRAY_DIVISOR_ANGLE: number;
+}
+
+declare var ANGLE_instanced_arrays: {
+    prototype: ANGLE_instanced_arrays;
+    new(): ANGLE_instanced_arrays;
+    readonly VERTEX_ATTRIB_ARRAY_DIVISOR_ANGLE: number;
+};
+
+interface AnimationEvent extends Event {
+    readonly animationName: string;
+    readonly elapsedTime: number;
+    initAnimationEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, animationNameArg: string, elapsedTimeArg: number): void;
+}
+
+declare var AnimationEvent: {
+    prototype: AnimationEvent;
+    new(typeArg: string, eventInitDict?: AnimationEventInit): AnimationEvent;
+};
+
+interface ApplicationCacheEventMap {
+    "cached": Event;
+    "checking": Event;
+    "downloading": Event;
+    "error": Event;
+    "noupdate": Event;
+    "obsolete": Event;
+    "progress": ProgressEvent;
+    "updateready": Event;
+}
+
+interface ApplicationCache extends EventTarget {
+    oncached: (this: ApplicationCache, ev: Event) => any;
+    onchecking: (this: ApplicationCache, ev: Event) => any;
+    ondownloading: (this: ApplicationCache, ev: Event) => any;
+    onerror: (this: ApplicationCache, ev: Event) => any;
+    onnoupdate: (this: ApplicationCache, ev: Event) => any;
+    onobsolete: (this: ApplicationCache, ev: Event) => any;
+    onprogress: (this: ApplicationCache, ev: ProgressEvent) => any;
+    onupdateready: (this: ApplicationCache, ev: Event) => any;
+    readonly status: number;
+    abort(): void;
+    swapCache(): void;
+    update(): void;
+    readonly CHECKING: number;
+    readonly DOWNLOADING: number;
+    readonly IDLE: number;
+    readonly OBSOLETE: number;
+    readonly UNCACHED: number;
+    readonly UPDATEREADY: number;
+    addEventListener<K extends keyof ApplicationCacheEventMap>(type: K, listener: (this: ApplicationCache, ev: ApplicationCacheEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var ApplicationCache: {
+    prototype: ApplicationCache;
+    new(): ApplicationCache;
+    readonly CHECKING: number;
+    readonly DOWNLOADING: number;
+    readonly IDLE: number;
+    readonly OBSOLETE: number;
+    readonly UNCACHED: number;
+    readonly UPDATEREADY: number;
+};
+
+interface Attr extends Node {
+    readonly name: string;
+    readonly ownerElement: Element;
+    readonly prefix: string | null;
+    readonly specified: boolean;
+    value: string;
+}
+
+declare var Attr: {
+    prototype: Attr;
+    new(): Attr;
+};
+
+interface AudioBuffer {
+    readonly duration: number;
+    readonly length: number;
+    readonly numberOfChannels: number;
+    readonly sampleRate: number;
+    copyFromChannel(destination: Float32Array, channelNumber: number, startInChannel?: number): void;
+    copyToChannel(source: Float32Array, channelNumber: number, startInChannel?: number): void;
+    getChannelData(channel: number): Float32Array;
+}
+
+declare var AudioBuffer: {
+    prototype: AudioBuffer;
+    new(): AudioBuffer;
+};
+
+interface AudioBufferSourceNodeEventMap {
+    "ended": MediaStreamErrorEvent;
+}
+
+interface AudioBufferSourceNode extends AudioNode {
+    buffer: AudioBuffer | null;
+    readonly detune: AudioParam;
+    loop: boolean;
+    loopEnd: number;
+    loopStart: number;
+    onended: (this: AudioBufferSourceNode, ev: MediaStreamErrorEvent) => any;
+    readonly playbackRate: AudioParam;
+    start(when?: number, offset?: number, duration?: number): void;
+    stop(when?: number): void;
+    addEventListener<K extends keyof AudioBufferSourceNodeEventMap>(type: K, listener: (this: AudioBufferSourceNode, ev: AudioBufferSourceNodeEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var AudioBufferSourceNode: {
+    prototype: AudioBufferSourceNode;
+    new(): AudioBufferSourceNode;
+};
+
+interface AudioContextEventMap {
+    "statechange": Event;
+}
+
+interface AudioContextBase extends EventTarget {
+    readonly currentTime: number;
+    readonly destination: AudioDestinationNode;
+    readonly listener: AudioListener;
+    onstatechange: (this: AudioContext, ev: Event) => any;
+    readonly sampleRate: number;
+    readonly state: AudioContextState;
+    close(): Promise<void>;
+    createAnalyser(): AnalyserNode;
+    createBiquadFilter(): BiquadFilterNode;
+    createBuffer(numberOfChannels: number, length: number, sampleRate: number): AudioBuffer;
+    createBufferSource(): AudioBufferSourceNode;
+    createChannelMerger(numberOfInputs?: number): ChannelMergerNode;
+    createChannelSplitter(numberOfOutputs?: number): ChannelSplitterNode;
+    createConvolver(): ConvolverNode;
+    createDelay(maxDelayTime?: number): DelayNode;
+    createDynamicsCompressor(): DynamicsCompressorNode;
+    createGain(): GainNode;
+    createIIRFilter(feedforward: number[], feedback: number[]): IIRFilterNode;
+    createMediaElementSource(mediaElement: HTMLMediaElement): MediaElementAudioSourceNode;
+    createMediaStreamSource(mediaStream: MediaStream): MediaStreamAudioSourceNode;
+    createOscillator(): OscillatorNode;
+    createPanner(): PannerNode;
+    createPeriodicWave(real: Float32Array, imag: Float32Array, constraints?: PeriodicWaveConstraints): PeriodicWave;
+    createScriptProcessor(bufferSize?: number, numberOfInputChannels?: number, numberOfOutputChannels?: number): ScriptProcessorNode;
+    createStereoPanner(): StereoPannerNode;
+    createWaveShaper(): WaveShaperNode;
+    decodeAudioData(audioData: ArrayBuffer, successCallback?: DecodeSuccessCallback, errorCallback?: DecodeErrorCallback): Promise<AudioBuffer>;
+    resume(): Promise<void>;
+    addEventListener<K extends keyof AudioContextEventMap>(type: K, listener: (this: AudioContext, ev: AudioContextEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+interface AudioContext extends AudioContextBase {
+    suspend(): Promise<void>;
+}
+
+declare var AudioContext: {
+    prototype: AudioContext;
+    new(): AudioContext;
+};
+
+interface AudioDestinationNode extends AudioNode {
+    readonly maxChannelCount: number;
+}
+
+declare var AudioDestinationNode: {
+    prototype: AudioDestinationNode;
+    new(): AudioDestinationNode;
+};
+
+interface AudioListener {
+    dopplerFactor: number;
+    speedOfSound: number;
+    setOrientation(x: number, y: number, z: number, xUp: number, yUp: number, zUp: number): void;
+    setPosition(x: number, y: number, z: number): void;
+    setVelocity(x: number, y: number, z: number): void;
+}
+
+declare var AudioListener: {
+    prototype: AudioListener;
+    new(): AudioListener;
+};
+
+interface AudioNode extends EventTarget {
+    channelCount: number;
+    channelCountMode: ChannelCountMode;
+    channelInterpretation: ChannelInterpretation;
+    readonly context: AudioContext;
+    readonly numberOfInputs: number;
+    readonly numberOfOutputs: number;
+    connect(destination: AudioNode, output?: number, input?: number): AudioNode;
+    connect(destination: AudioParam, output?: number): void;
+    disconnect(output?: number): void;
+    disconnect(destination: AudioNode, output?: number, input?: number): void;
+    disconnect(destination: AudioParam, output?: number): void;
+}
+
+declare var AudioNode: {
+    prototype: AudioNode;
+    new(): AudioNode;
+};
+
+interface AudioParam {
+    readonly defaultValue: number;
+    value: number;
+    cancelScheduledValues(startTime: number): AudioParam;
+    exponentialRampToValueAtTime(value: number, endTime: number): AudioParam;
+    linearRampToValueAtTime(value: number, endTime: number): AudioParam;
+    setTargetAtTime(target: number, startTime: number, timeConstant: number): AudioParam;
+    setValueAtTime(value: number, startTime: number): AudioParam;
+    setValueCurveAtTime(values: Float32Array, startTime: number, duration: number): AudioParam;
+}
+
+declare var AudioParam: {
+    prototype: AudioParam;
+    new(): AudioParam;
+};
+
+interface AudioProcessingEvent extends Event {
+    readonly inputBuffer: AudioBuffer;
+    readonly outputBuffer: AudioBuffer;
+    readonly playbackTime: number;
+}
+
+declare var AudioProcessingEvent: {
+    prototype: AudioProcessingEvent;
+    new(): AudioProcessingEvent;
+};
+
+interface AudioTrack {
+    enabled: boolean;
+    readonly id: string;
+    kind: string;
+    readonly label: string;
+    language: string;
+    readonly sourceBuffer: SourceBuffer;
+}
+
+declare var AudioTrack: {
+    prototype: AudioTrack;
+    new(): AudioTrack;
+};
+
+interface AudioTrackListEventMap {
+    "addtrack": TrackEvent;
+    "change": Event;
+    "removetrack": TrackEvent;
+}
+
+interface AudioTrackList extends EventTarget {
+    readonly length: number;
+    onaddtrack: (this: AudioTrackList, ev: TrackEvent) => any;
+    onchange: (this: AudioTrackList, ev: Event) => any;
+    onremovetrack: (this: AudioTrackList, ev: TrackEvent) => any;
+    getTrackById(id: string): AudioTrack | null;
+    item(index: number): AudioTrack;
+    addEventListener<K extends keyof AudioTrackListEventMap>(type: K, listener: (this: AudioTrackList, ev: AudioTrackListEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+    [index: number]: AudioTrack;
+}
+
+declare var AudioTrackList: {
+    prototype: AudioTrackList;
+    new(): AudioTrackList;
+};
+
+interface BarProp {
+    readonly visible: boolean;
+}
+
+declare var BarProp: {
+    prototype: BarProp;
+    new(): BarProp;
+};
+
+interface BeforeUnloadEvent extends Event {
+    returnValue: any;
+}
+
+declare var BeforeUnloadEvent: {
+    prototype: BeforeUnloadEvent;
+    new(): BeforeUnloadEvent;
+};
+
+interface BiquadFilterNode extends AudioNode {
+    readonly detune: AudioParam;
+    readonly frequency: AudioParam;
+    readonly gain: AudioParam;
+    readonly Q: AudioParam;
+    type: BiquadFilterType;
+    getFrequencyResponse(frequencyHz: Float32Array, magResponse: Float32Array, phaseResponse: Float32Array): void;
+}
+
+declare var BiquadFilterNode: {
+    prototype: BiquadFilterNode;
+    new(): BiquadFilterNode;
+};
+
+interface Blob {
+    readonly size: number;
+    readonly type: string;
+    msClose(): void;
+    msDetachStream(): any;
+    slice(start?: number, end?: number, contentType?: string): Blob;
+}
+
+declare var Blob: {
+    prototype: Blob;
+    new (blobParts?: any[], options?: BlobPropertyBag): Blob;
+};
+
+interface Cache {
+    add(request: RequestInfo): Promise<void>;
+    addAll(requests: RequestInfo[]): Promise<void>;
+    delete(request: RequestInfo, options?: CacheQueryOptions): Promise<boolean>;
+    keys(request?: RequestInfo, options?: CacheQueryOptions): any;
+    match(request: RequestInfo, options?: CacheQueryOptions): Promise<Response>;
+    matchAll(request?: RequestInfo, options?: CacheQueryOptions): any;
+    put(request: RequestInfo, response: Response): Promise<void>;
+}
+
+declare var Cache: {
+    prototype: Cache;
+    new(): Cache;
+};
+
+interface CacheStorage {
+    delete(cacheName: string): Promise<boolean>;
+    has(cacheName: string): Promise<boolean>;
+    keys(): any;
+    match(request: RequestInfo, options?: CacheQueryOptions): Promise<any>;
+    open(cacheName: string): Promise<Cache>;
+}
+
+declare var CacheStorage: {
+    prototype: CacheStorage;
+    new(): CacheStorage;
+};
+
+interface CanvasGradient {
+    addColorStop(offset: number, color: string): void;
+}
+
+declare var CanvasGradient: {
+    prototype: CanvasGradient;
+    new(): CanvasGradient;
+};
+
+interface CanvasPattern {
+    setTransform(matrix: SVGMatrix): void;
+}
+
+declare var CanvasPattern: {
+    prototype: CanvasPattern;
+    new(): CanvasPattern;
+};
+
+interface CanvasRenderingContext2D extends Object, CanvasPathMethods {
+    readonly canvas: HTMLCanvasElement;
+    fillStyle: string | CanvasGradient | CanvasPattern;
+    font: string;
+    globalAlpha: number;
+    globalCompositeOperation: string;
+    imageSmoothingEnabled: boolean;
+    lineCap: string;
+    lineDashOffset: number;
+    lineJoin: string;
+    lineWidth: number;
+    miterLimit: number;
+    msFillRule: CanvasFillRule;
+    shadowBlur: number;
+    shadowColor: string;
+    shadowOffsetX: number;
+    shadowOffsetY: number;
+    strokeStyle: string | CanvasGradient | CanvasPattern;
+    textAlign: string;
+    textBaseline: string;
+    mozImageSmoothingEnabled: boolean;
+    webkitImageSmoothingEnabled: boolean;
+    oImageSmoothingEnabled: boolean;
+    beginPath(): void;
+    clearRect(x: number, y: number, w: number, h: number): void;
+    clip(fillRule?: CanvasFillRule): void;
+    createImageData(imageDataOrSw: number | ImageData, sh?: number): ImageData;
+    createLinearGradient(x0: number, y0: number, x1: number, y1: number): CanvasGradient;
+    createPattern(image: HTMLImageElement | HTMLCanvasElement | HTMLVideoElement, repetition: string): CanvasPattern;
+    createRadialGradient(x0: number, y0: number, r0: number, x1: number, y1: number, r1: number): CanvasGradient;
+    drawFocusIfNeeded(element: Element): void;
+    drawImage(image: HTMLImageElement | HTMLCanvasElement | HTMLVideoElement | ImageBitmap, dstX: number, dstY: number): void;
+    drawImage(image: HTMLImageElement | HTMLCanvasElement | HTMLVideoElement | ImageBitmap, dstX: number, dstY: number, dstW: number, dstH: number): void;
+    drawImage(image: HTMLImageElement | HTMLCanvasElement | HTMLVideoElement | ImageBitmap, srcX: number, srcY: number, srcW: number, srcH: number, dstX: number, dstY: number, dstW: number, dstH: number): void;
+    fill(fillRule?: CanvasFillRule): void;
+    fillRect(x: number, y: number, w: number, h: number): void;
+    fillText(text: string, x: number, y: number, maxWidth?: number): void;
+    getImageData(sx: number, sy: number, sw: number, sh: number): ImageData;
+    getLineDash(): number[];
+    isPointInPath(x: number, y: number, fillRule?: CanvasFillRule): boolean;
+    measureText(text: string): TextMetrics;
+    putImageData(imagedata: ImageData, dx: number, dy: number, dirtyX?: number, dirtyY?: number, dirtyWidth?: number, dirtyHeight?: number): void;
+    restore(): void;
+    rotate(angle: number): void;
+    save(): void;
+    scale(x: number, y: number): void;
+    setLineDash(segments: number[]): void;
+    setTransform(m11: number, m12: number, m21: number, m22: number, dx: number, dy: number): void;
+    stroke(path?: Path2D): void;
+    strokeRect(x: number, y: number, w: number, h: number): void;
+    strokeText(text: string, x: number, y: number, maxWidth?: number): void;
+    transform(m11: number, m12: number, m21: number, m22: number, dx: number, dy: number): void;
+    translate(x: number, y: number): void;
+}
+
+declare var CanvasRenderingContext2D: {
+    prototype: CanvasRenderingContext2D;
+    new(): CanvasRenderingContext2D;
+};
+
+interface CDATASection extends Text {
+}
+
+declare var CDATASection: {
+    prototype: CDATASection;
+    new(): CDATASection;
+};
+
+interface ChannelMergerNode extends AudioNode {
+}
+
+declare var ChannelMergerNode: {
+    prototype: ChannelMergerNode;
+    new(): ChannelMergerNode;
+};
+
+interface ChannelSplitterNode extends AudioNode {
+}
+
+declare var ChannelSplitterNode: {
+    prototype: ChannelSplitterNode;
+    new(): ChannelSplitterNode;
+};
+
+interface CharacterData extends Node, ChildNode {
+    data: string;
+    readonly length: number;
+    appendData(arg: string): void;
+    deleteData(offset: number, count: number): void;
+    insertData(offset: number, arg: string): void;
+    replaceData(offset: number, count: number, arg: string): void;
+    substringData(offset: number, count: number): string;
+}
+
+declare var CharacterData: {
+    prototype: CharacterData;
+    new(): CharacterData;
+};
+
+interface ClientRect {
+    bottom: number;
+    readonly height: number;
+    left: number;
+    right: number;
+    top: number;
+    readonly width: number;
+}
+
+declare var ClientRect: {
+    prototype: ClientRect;
+    new(): ClientRect;
+};
+
+interface ClientRectList {
+    readonly length: number;
+    item(index: number): ClientRect;
+    [index: number]: ClientRect;
+}
+
+declare var ClientRectList: {
+    prototype: ClientRectList;
+    new(): ClientRectList;
+};
+
+interface ClipboardEvent extends Event {
+    readonly clipboardData: DataTransfer;
+}
+
+declare var ClipboardEvent: {
+    prototype: ClipboardEvent;
+    new(type: string, eventInitDict?: ClipboardEventInit): ClipboardEvent;
+};
+
+interface CloseEvent extends Event {
+    readonly code: number;
+    readonly reason: string;
+    readonly wasClean: boolean;
+    initCloseEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, wasCleanArg: boolean, codeArg: number, reasonArg: string): void;
+}
+
+declare var CloseEvent: {
+    prototype: CloseEvent;
+    new(typeArg: string, eventInitDict?: CloseEventInit): CloseEvent;
+};
+
+interface Comment extends CharacterData {
+    text: string;
+}
+
+declare var Comment: {
+    prototype: Comment;
+    new(): Comment;
+};
+
+interface CompositionEvent extends UIEvent {
+    readonly data: string;
+    readonly locale: string;
+    initCompositionEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, dataArg: string, locale: string): void;
+}
+
+declare var CompositionEvent: {
+    prototype: CompositionEvent;
+    new(typeArg: string, eventInitDict?: CompositionEventInit): CompositionEvent;
+};
+
+interface Console {
+    assert(test?: boolean, message?: string, ...optionalParams: any[]): void;
+    clear(): void;
+    count(countTitle?: string): void;
+    debug(message?: any, ...optionalParams: any[]): void;
+    dir(value?: any, ...optionalParams: any[]): void;
+    dirxml(value: any): void;
+    error(message?: any, ...optionalParams: any[]): void;
+    exception(message?: string, ...optionalParams: any[]): void;
+    group(groupTitle?: string, ...optionalParams: any[]): void;
+    groupCollapsed(groupTitle?: string, ...optionalParams: any[]): void;
+    groupEnd(): void;
+    info(message?: any, ...optionalParams: any[]): void;
+    log(message?: any, ...optionalParams: any[]): void;
+    msIsIndependentlyComposed(element: Element): boolean;
+    profile(reportName?: string): void;
+    profileEnd(): void;
+    select(element: Element): void;
+    table(...data: any[]): void;
+    time(timerName?: string): void;
+    timeEnd(timerName?: string): void;
+    trace(message?: any, ...optionalParams: any[]): void;
+    warn(message?: any, ...optionalParams: any[]): void;
+}
+
+declare var Console: {
+    prototype: Console;
+    new(): Console;
+};
+
+interface ConvolverNode extends AudioNode {
+    buffer: AudioBuffer | null;
+    normalize: boolean;
+}
+
+declare var ConvolverNode: {
+    prototype: ConvolverNode;
+    new(): ConvolverNode;
+};
+
+interface Coordinates {
+    readonly accuracy: number;
+    readonly altitude: number | null;
+    readonly altitudeAccuracy: number | null;
+    readonly heading: number | null;
+    readonly latitude: number;
+    readonly longitude: number;
+    readonly speed: number | null;
+}
+
+declare var Coordinates: {
+    prototype: Coordinates;
+    new(): Coordinates;
+};
+
+interface Crypto extends Object, RandomSource {
+    readonly subtle: SubtleCrypto;
+}
+
+declare var Crypto: {
+    prototype: Crypto;
+    new(): Crypto;
+};
+
+interface CryptoKey {
+    readonly algorithm: KeyAlgorithm;
+    readonly extractable: boolean;
+    readonly type: string;
+    readonly usages: string[];
+}
+
+declare var CryptoKey: {
+    prototype: CryptoKey;
+    new(): CryptoKey;
+};
+
+interface CryptoKeyPair {
+    privateKey: CryptoKey;
+    publicKey: CryptoKey;
+}
+
+declare var CryptoKeyPair: {
+    prototype: CryptoKeyPair;
+    new(): CryptoKeyPair;
+};
+
+interface CSS {
+    supports(property: string, value?: string): boolean;
+}
+declare var CSS: CSS;
+
+interface CSSConditionRule extends CSSGroupingRule {
+    conditionText: string;
+}
+
+declare var CSSConditionRule: {
+    prototype: CSSConditionRule;
+    new(): CSSConditionRule;
+};
+
+interface CSSFontFaceRule extends CSSRule {
+    readonly style: CSSStyleDeclaration;
+}
+
+declare var CSSFontFaceRule: {
+    prototype: CSSFontFaceRule;
+    new(): CSSFontFaceRule;
+};
+
+interface CSSGroupingRule extends CSSRule {
+    readonly cssRules: CSSRuleList;
+    deleteRule(index: number): void;
+    insertRule(rule: string, index: number): number;
+}
+
+declare var CSSGroupingRule: {
+    prototype: CSSGroupingRule;
+    new(): CSSGroupingRule;
+};
+
+interface CSSImportRule extends CSSRule {
+    readonly href: string;
+    readonly media: MediaList;
+    readonly styleSheet: CSSStyleSheet;
+}
+
+declare var CSSImportRule: {
+    prototype: CSSImportRule;
+    new(): CSSImportRule;
+};
+
+interface CSSKeyframeRule extends CSSRule {
+    keyText: string;
+    readonly style: CSSStyleDeclaration;
+}
+
+declare var CSSKeyframeRule: {
+    prototype: CSSKeyframeRule;
+    new(): CSSKeyframeRule;
+};
+
+interface CSSKeyframesRule extends CSSRule {
+    readonly cssRules: CSSRuleList;
+    name: string;
+    appendRule(rule: string): void;
+    deleteRule(rule: string): void;
+    findRule(rule: string): CSSKeyframeRule;
+}
+
+declare var CSSKeyframesRule: {
+    prototype: CSSKeyframesRule;
+    new(): CSSKeyframesRule;
+};
+
+interface CSSMediaRule extends CSSConditionRule {
+    readonly media: MediaList;
+}
+
+declare var CSSMediaRule: {
+    prototype: CSSMediaRule;
+    new(): CSSMediaRule;
+};
+
+interface CSSNamespaceRule extends CSSRule {
+    readonly namespaceURI: string;
+    readonly prefix: string;
+}
+
+declare var CSSNamespaceRule: {
+    prototype: CSSNamespaceRule;
+    new(): CSSNamespaceRule;
+};
+
+interface CSSPageRule extends CSSRule {
+    readonly pseudoClass: string;
+    readonly selector: string;
+    selectorText: string;
+    readonly style: CSSStyleDeclaration;
+}
+
+declare var CSSPageRule: {
+    prototype: CSSPageRule;
+    new(): CSSPageRule;
+};
+
+interface CSSRule {
+    cssText: string;
+    readonly parentRule: CSSRule;
+    readonly parentStyleSheet: CSSStyleSheet;
+    readonly type: number;
+    readonly CHARSET_RULE: number;
+    readonly FONT_FACE_RULE: number;
+    readonly IMPORT_RULE: number;
+    readonly KEYFRAME_RULE: number;
+    readonly KEYFRAMES_RULE: number;
+    readonly MEDIA_RULE: number;
+    readonly NAMESPACE_RULE: number;
+    readonly PAGE_RULE: number;
+    readonly STYLE_RULE: number;
+    readonly SUPPORTS_RULE: number;
+    readonly UNKNOWN_RULE: number;
+    readonly VIEWPORT_RULE: number;
+}
+
+declare var CSSRule: {
+    prototype: CSSRule;
+    new(): CSSRule;
+    readonly CHARSET_RULE: number;
+    readonly FONT_FACE_RULE: number;
+    readonly IMPORT_RULE: number;
+    readonly KEYFRAME_RULE: number;
+    readonly KEYFRAMES_RULE: number;
+    readonly MEDIA_RULE: number;
+    readonly NAMESPACE_RULE: number;
+    readonly PAGE_RULE: number;
+    readonly STYLE_RULE: number;
+    readonly SUPPORTS_RULE: number;
+    readonly UNKNOWN_RULE: number;
+    readonly VIEWPORT_RULE: number;
+};
+
+interface CSSRuleList {
+    readonly length: number;
+    item(index: number): CSSRule;
+    [index: number]: CSSRule;
+}
+
+declare var CSSRuleList: {
+    prototype: CSSRuleList;
+    new(): CSSRuleList;
+};
+
+interface CSSStyleDeclaration {
+    alignContent: string | null;
+    alignItems: string | null;
+    alignmentBaseline: string | null;
+    alignSelf: string | null;
+    animation: string | null;
+    animationDelay: string | null;
+    animationDirection: string | null;
+    animationDuration: string | null;
+    animationFillMode: string | null;
+    animationIterationCount: string | null;
+    animationName: string | null;
+    animationPlayState: string | null;
+    animationTimingFunction: string | null;
+    backfaceVisibility: string | null;
+    background: string | null;
+    backgroundAttachment: string | null;
+    backgroundClip: string | null;
+    backgroundColor: string | null;
+    backgroundImage: string | null;
+    backgroundOrigin: string | null;
+    backgroundPosition: string | null;
+    backgroundPositionX: string | null;
+    backgroundPositionY: string | null;
+    backgroundRepeat: string | null;
+    backgroundSize: string | null;
+    baselineShift: string | null;
+    border: string | null;
+    borderBottom: string | null;
+    borderBottomColor: string | null;
+    borderBottomLeftRadius: string | null;
+    borderBottomRightRadius: string | null;
+    borderBottomStyle: string | null;
+    borderBottomWidth: string | null;
+    borderCollapse: string | null;
+    borderColor: string | null;
+    borderImage: string | null;
+    borderImageOutset: string | null;
+    borderImageRepeat: string | null;
+    borderImageSlice: string | null;
+    borderImageSource: string | null;
+    borderImageWidth: string | null;
+    borderLeft: string | null;
+    borderLeftColor: string | null;
+    borderLeftStyle: string | null;
+    borderLeftWidth: string | null;
+    borderRadius: string | null;
+    borderRight: string | null;
+    borderRightColor: string | null;
+    borderRightStyle: string | null;
+    borderRightWidth: string | null;
+    borderSpacing: string | null;
+    borderStyle: string | null;
+    borderTop: string | null;
+    borderTopColor: string | null;
+    borderTopLeftRadius: string | null;
+    borderTopRightRadius: string | null;
+    borderTopStyle: string | null;
+    borderTopWidth: string | null;
+    borderWidth: string | null;
+    bottom: string | null;
+    boxShadow: string | null;
+    boxSizing: string | null;
+    breakAfter: string | null;
+    breakBefore: string | null;
+    breakInside: string | null;
+    captionSide: string | null;
+    clear: string | null;
+    clip: string | null;
+    clipPath: string | null;
+    clipRule: string | null;
+    color: string | null;
+    colorInterpolationFilters: string | null;
+    columnCount: any;
+    columnFill: string | null;
+    columnGap: any;
+    columnRule: string | null;
+    columnRuleColor: any;
+    columnRuleStyle: string | null;
+    columnRuleWidth: any;
+    columns: string | null;
+    columnSpan: string | null;
+    columnWidth: any;
+    content: string | null;
+    counterIncrement: string | null;
+    counterReset: string | null;
+    cssFloat: string | null;
+    cssText: string;
+    cursor: string | null;
+    direction: string | null;
+    display: string | null;
+    dominantBaseline: string | null;
+    emptyCells: string | null;
+    enableBackground: string | null;
+    fill: string | null;
+    fillOpacity: string | null;
+    fillRule: string | null;
+    filter: string | null;
+    flex: string | null;
+    flexBasis: string | null;
+    flexDirection: string | null;
+    flexFlow: string | null;
+    flexGrow: string | null;
+    flexShrink: string | null;
+    flexWrap: string | null;
+    floodColor: string | null;
+    floodOpacity: string | null;
+    font: string | null;
+    fontFamily: string | null;
+    fontFeatureSettings: string | null;
+    fontSize: string | null;
+    fontSizeAdjust: string | null;
+    fontStretch: string | null;
+    fontStyle: string | null;
+    fontVariant: string | null;
+    fontWeight: string | null;
+    glyphOrientationHorizontal: string | null;
+    glyphOrientationVertical: string | null;
+    height: string | null;
+    imeMode: string | null;
+    justifyContent: string | null;
+    kerning: string | null;
+    layoutGrid: string | null;
+    layoutGridChar: string | null;
+    layoutGridLine: string | null;
+    layoutGridMode: string | null;
+    layoutGridType: string | null;
+    left: string | null;
+    readonly length: number;
+    letterSpacing: string | null;
+    lightingColor: string | null;
+    lineBreak: string | null;
+    lineHeight: string | null;
+    listStyle: string | null;
+    listStyleImage: string | null;
+    listStylePosition: string | null;
+    listStyleType: string | null;
+    margin: string | null;
+    marginBottom: string | null;
+    marginLeft: string | null;
+    marginRight: string | null;
+    marginTop: string | null;
+    marker: string | null;
+    markerEnd: string | null;
+    markerMid: string | null;
+    markerStart: string | null;
+    mask: string | null;
+    maxHeight: string | null;
+    maxWidth: string | null;
+    minHeight: string | null;
+    minWidth: string | null;
+    msContentZoomChaining: string | null;
+    msContentZooming: string | null;
+    msContentZoomLimit: string | null;
+    msContentZoomLimitMax: any;
+    msContentZoomLimitMin: any;
+    msContentZoomSnap: string | null;
+    msContentZoomSnapPoints: string | null;
+    msContentZoomSnapType: string | null;
+    msFlowFrom: string | null;
+    msFlowInto: string | null;
+    msFontFeatureSettings: string | null;
+    msGridColumn: any;
+    msGridColumnAlign: string | null;
+    msGridColumns: string | null;
+    msGridColumnSpan: any;
+    msGridRow: any;
+    msGridRowAlign: string | null;
+    msGridRows: string | null;
+    msGridRowSpan: any;
+    msHighContrastAdjust: string | null;
+    msHyphenateLimitChars: string | null;
+    msHyphenateLimitLines: any;
+    msHyphenateLimitZone: any;
+    msHyphens: string | null;
+    msImeAlign: string | null;
+    msOverflowStyle: string | null;
+    msScrollChaining: string | null;
+    msScrollLimit: string | null;
+    msScrollLimitXMax: any;
+    msScrollLimitXMin: any;
+    msScrollLimitYMax: any;
+    msScrollLimitYMin: any;
+    msScrollRails: string | null;
+    msScrollSnapPointsX: string | null;
+    msScrollSnapPointsY: string | null;
+    msScrollSnapType: string | null;
+    msScrollSnapX: string | null;
+    msScrollSnapY: string | null;
+    msScrollTranslation: string | null;
+    msTextCombineHorizontal: string | null;
+    msTextSizeAdjust: any;
+    msTouchAction: string | null;
+    msTouchSelect: string | null;
+    msUserSelect: string | null;
+    msWrapFlow: string;
+    msWrapMargin: any;
+    msWrapThrough: string;
+    opacity: string | null;
+    order: string | null;
+    orphans: string | null;
+    outline: string | null;
+    outlineColor: string | null;
+    outlineOffset: string | null;
+    outlineStyle: string | null;
+    outlineWidth: string | null;
+    overflow: string | null;
+    overflowX: string | null;
+    overflowY: string | null;
+    padding: string | null;
+    paddingBottom: string | null;
+    paddingLeft: string | null;
+    paddingRight: string | null;
+    paddingTop: string | null;
+    pageBreakAfter: string | null;
+    pageBreakBefore: string | null;
+    pageBreakInside: string | null;
+    readonly parentRule: CSSRule;
+    perspective: string | null;
+    perspectiveOrigin: string | null;
+    pointerEvents: string | null;
+    position: string | null;
+    quotes: string | null;
+    right: string | null;
+    rotate: string | null;
+    rubyAlign: string | null;
+    rubyOverhang: string | null;
+    rubyPosition: string | null;
+    scale: string | null;
+    stopColor: string | null;
+    stopOpacity: string | null;
+    stroke: string | null;
+    strokeDasharray: string | null;
+    strokeDashoffset: string | null;
+    strokeLinecap: string | null;
+    strokeLinejoin: string | null;
+    strokeMiterlimit: string | null;
+    strokeOpacity: string | null;
+    strokeWidth: string | null;
+    tableLayout: string | null;
+    textAlign: string | null;
+    textAlignLast: string | null;
+    textAnchor: string | null;
+    textDecoration: string | null;
+    textIndent: string | null;
+    textJustify: string | null;
+    textKashida: string | null;
+    textKashidaSpace: string | null;
+    textOverflow: string | null;
+    textShadow: string | null;
+    textTransform: string | null;
+    textUnderlinePosition: string | null;
+    top: string | null;
+    touchAction: string | null;
+    transform: string | null;
+    transformOrigin: string | null;
+    transformStyle: string | null;
+    transition: string | null;
+    transitionDelay: string | null;
+    transitionDuration: string | null;
+    transitionProperty: string | null;
+    transitionTimingFunction: string | null;
+    translate: string | null;
+    unicodeBidi: string | null;
+    verticalAlign: string | null;
+    visibility: string | null;
+    webkitAlignContent: string | null;
+    webkitAlignItems: string | null;
+    webkitAlignSelf: string | null;
+    webkitAnimation: string | null;
+    webkitAnimationDelay: string | null;
+    webkitAnimationDirection: string | null;
+    webkitAnimationDuration: string | null;
+    webkitAnimationFillMode: string | null;
+    webkitAnimationIterationCount: string | null;
+    webkitAnimationName: string | null;
+    webkitAnimationPlayState: string | null;
+    webkitAnimationTimingFunction: string | null;
+    webkitAppearance: string | null;
+    webkitBackfaceVisibility: string | null;
+    webkitBackgroundClip: string | null;
+    webkitBackgroundOrigin: string | null;
+    webkitBackgroundSize: string | null;
+    webkitBorderBottomLeftRadius: string | null;
+    webkitBorderBottomRightRadius: string | null;
+    webkitBorderImage: string | null;
+    webkitBorderRadius: string | null;
+    webkitBorderTopLeftRadius: string | null;
+    webkitBorderTopRightRadius: string | null;
+    webkitBoxAlign: string | null;
+    webkitBoxDirection: string | null;
+    webkitBoxFlex: string | null;
+    webkitBoxOrdinalGroup: string | null;
+    webkitBoxOrient: string | null;
+    webkitBoxPack: string | null;
+    webkitBoxSizing: string | null;
+    webkitColumnBreakAfter: string | null;
+    webkitColumnBreakBefore: string | null;
+    webkitColumnBreakInside: string | null;
+    webkitColumnCount: any;
+    webkitColumnGap: any;
+    webkitColumnRule: string | null;
+    webkitColumnRuleColor: any;
+    webkitColumnRuleStyle: string | null;
+    webkitColumnRuleWidth: any;
+    webkitColumns: string | null;
+    webkitColumnSpan: string | null;
+    webkitColumnWidth: any;
+    webkitFilter: string | null;
+    webkitFlex: string | null;
+    webkitFlexBasis: string | null;
+    webkitFlexDirection: string | null;
+    webkitFlexFlow: string | null;
+    webkitFlexGrow: string | null;
+    webkitFlexShrink: string | null;
+    webkitFlexWrap: string | null;
+    webkitJustifyContent: string | null;
+    webkitOrder: string | null;
+    webkitPerspective: string | null;
+    webkitPerspectiveOrigin: string | null;
+    webkitTapHighlightColor: string | null;
+    webkitTextFillColor: string | null;
+    webkitTextSizeAdjust: any;
+    webkitTextStroke: string | null;
+    webkitTextStrokeColor: string | null;
+    webkitTextStrokeWidth: string | null;
+    webkitTransform: string | null;
+    webkitTransformOrigin: string | null;
+    webkitTransformStyle: string | null;
+    webkitTransition: string | null;
+    webkitTransitionDelay: string | null;
+    webkitTransitionDuration: string | null;
+    webkitTransitionProperty: string | null;
+    webkitTransitionTimingFunction: string | null;
+    webkitUserModify: string | null;
+    webkitUserSelect: string | null;
+    webkitWritingMode: string | null;
+    whiteSpace: string | null;
+    widows: string | null;
+    width: string | null;
+    wordBreak: string | null;
+    wordSpacing: string | null;
+    wordWrap: string | null;
+    writingMode: string | null;
+    zIndex: string | null;
+    zoom: string | null;
+    resize: string | null;
+    userSelect: string | null;
+    getPropertyPriority(propertyName: string): string;
+    getPropertyValue(propertyName: string): string;
+    item(index: number): string;
+    removeProperty(propertyName: string): string;
+    setProperty(propertyName: string, value: string | null, priority?: string): void;
+    [index: number]: string;
+}
+
+declare var CSSStyleDeclaration: {
+    prototype: CSSStyleDeclaration;
+    new(): CSSStyleDeclaration;
+};
+
+interface CSSStyleRule extends CSSRule {
+    readonly readOnly: boolean;
+    selectorText: string;
+    readonly style: CSSStyleDeclaration;
+}
+
+declare var CSSStyleRule: {
+    prototype: CSSStyleRule;
+    new(): CSSStyleRule;
+};
+
+interface CSSStyleSheet extends StyleSheet {
+    readonly cssRules: CSSRuleList;
+    cssText: string;
+    readonly id: string;
+    readonly imports: StyleSheetList;
+    readonly isAlternate: boolean;
+    readonly isPrefAlternate: boolean;
+    readonly ownerRule: CSSRule;
+    readonly owningElement: Element;
+    readonly pages: StyleSheetPageList;
+    readonly readOnly: boolean;
+    readonly rules: CSSRuleList;
+    addImport(bstrURL: string, lIndex?: number): number;
+    addPageRule(bstrSelector: string, bstrStyle: string, lIndex?: number): number;
+    addRule(bstrSelector: string, bstrStyle?: string, lIndex?: number): number;
+    deleteRule(index?: number): void;
+    insertRule(rule: string, index?: number): number;
+    removeImport(lIndex: number): void;
+    removeRule(lIndex: number): void;
+}
+
+declare var CSSStyleSheet: {
+    prototype: CSSStyleSheet;
+    new(): CSSStyleSheet;
+};
+
+interface CSSSupportsRule extends CSSConditionRule {
+}
+
+declare var CSSSupportsRule: {
+    prototype: CSSSupportsRule;
+    new(): CSSSupportsRule;
+};
+
+interface CustomEvent extends Event {
+    readonly detail: any;
+    initCustomEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, detailArg: any): void;
+}
+
+declare var CustomEvent: {
+    prototype: CustomEvent;
+    new(typeArg: string, eventInitDict?: CustomEventInit): CustomEvent;
+};
+
+interface DataCue extends TextTrackCue {
+    data: ArrayBuffer;
+    addEventListener<K extends keyof TextTrackCueEventMap>(type: K, listener: (this: DataCue, ev: TextTrackCueEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var DataCue: {
+    prototype: DataCue;
+    new(): DataCue;
+};
+
+interface DataTransfer {
+    dropEffect: string;
+    effectAllowed: string;
+    readonly files: FileList;
+    readonly items: DataTransferItemList;
+    readonly types: string[];
+    clearData(format?: string): boolean;
+    getData(format: string): string;
+    setData(format: string, data: string): boolean;
+    setDragImage(image: Element, x: number, y: number): void;
+}
+
+declare var DataTransfer: {
+    prototype: DataTransfer;
+    new(): DataTransfer;
+};
+
+interface DataTransferItem {
+    readonly kind: string;
+    readonly type: string;
+    getAsFile(): File | null;
+    getAsString(_callback: FunctionStringCallback | null): void;
+    webkitGetAsEntry(): any;
+}
+
+declare var DataTransferItem: {
+    prototype: DataTransferItem;
+    new(): DataTransferItem;
+};
+
+interface DataTransferItemList {
+    readonly length: number;
+    add(data: File): DataTransferItem | null;
+    clear(): void;
+    item(index: number): DataTransferItem;
+    remove(index: number): void;
+    [index: number]: DataTransferItem;
+}
+
+declare var DataTransferItemList: {
+    prototype: DataTransferItemList;
+    new(): DataTransferItemList;
+};
+
+interface DeferredPermissionRequest {
+    readonly id: number;
+    readonly type: MSWebViewPermissionType;
+    readonly uri: string;
+    allow(): void;
+    deny(): void;
+}
+
+declare var DeferredPermissionRequest: {
+    prototype: DeferredPermissionRequest;
+    new(): DeferredPermissionRequest;
+};
+
+interface DelayNode extends AudioNode {
+    readonly delayTime: AudioParam;
+}
+
+declare var DelayNode: {
+    prototype: DelayNode;
+    new(): DelayNode;
+};
+
+interface DeviceAcceleration {
+    readonly x: number | null;
+    readonly y: number | null;
+    readonly z: number | null;
+}
+
+declare var DeviceAcceleration: {
+    prototype: DeviceAcceleration;
+    new(): DeviceAcceleration;
+};
+
+interface DeviceLightEvent extends Event {
+    readonly value: number;
+}
+
+declare var DeviceLightEvent: {
+    prototype: DeviceLightEvent;
+    new(typeArg: string, eventInitDict?: DeviceLightEventInit): DeviceLightEvent;
+};
+
+interface DeviceMotionEvent extends Event {
+    readonly acceleration: DeviceAcceleration | null;
+    readonly accelerationIncludingGravity: DeviceAcceleration | null;
+    readonly interval: number | null;
+    readonly rotationRate: DeviceRotationRate | null;
+    initDeviceMotionEvent(type: string, bubbles: boolean, cancelable: boolean, acceleration: DeviceAccelerationDict | null, accelerationIncludingGravity: DeviceAccelerationDict | null, rotationRate: DeviceRotationRateDict | null, interval: number | null): void;
+}
+
+declare var DeviceMotionEvent: {
+    prototype: DeviceMotionEvent;
+    new(typeArg: string, eventInitDict?: DeviceMotionEventInit): DeviceMotionEvent;
+};
+
+interface DeviceOrientationEvent extends Event {
+    readonly absolute: boolean;
+    readonly alpha: number | null;
+    readonly beta: number | null;
+    readonly gamma: number | null;
+    initDeviceOrientationEvent(type: string, bubbles: boolean, cancelable: boolean, alpha: number | null, beta: number | null, gamma: number | null, absolute: boolean): void;
+}
+
+declare var DeviceOrientationEvent: {
+    prototype: DeviceOrientationEvent;
+    new(typeArg: string, eventInitDict?: DeviceOrientationEventInit): DeviceOrientationEvent;
+};
+
+interface DeviceRotationRate {
+    readonly alpha: number | null;
+    readonly beta: number | null;
+    readonly gamma: number | null;
+}
+
+declare var DeviceRotationRate: {
+    prototype: DeviceRotationRate;
+    new(): DeviceRotationRate;
+};
+
+interface DocumentEventMap extends GlobalEventHandlersEventMap {
+    "abort": UIEvent;
+    "activate": UIEvent;
+    "beforeactivate": UIEvent;
+    "beforedeactivate": UIEvent;
+    "blur": FocusEvent;
+    "canplay": Event;
+    "canplaythrough": Event;
+    "change": Event;
+    "click": MouseEvent;
+    "contextmenu": PointerEvent;
+    "dblclick": MouseEvent;
+    "deactivate": UIEvent;
+    "drag": DragEvent;
+    "dragend": DragEvent;
+    "dragenter": DragEvent;
+    "dragleave": DragEvent;
+    "dragover": DragEvent;
+    "dragstart": DragEvent;
+    "drop": DragEvent;
+    "durationchange": Event;
+    "emptied": Event;
+    "ended": MediaStreamErrorEvent;
+    "error": ErrorEvent;
+    "focus": FocusEvent;
+    "fullscreenchange": Event;
+    "fullscreenerror": Event;
+    "input": Event;
+    "invalid": Event;
+    "keydown": KeyboardEvent;
+    "keypress": KeyboardEvent;
+    "keyup": KeyboardEvent;
+    "load": Event;
+    "loadeddata": Event;
+    "loadedmetadata": Event;
+    "loadstart": Event;
+    "mousedown": MouseEvent;
+    "mousemove": MouseEvent;
+    "mouseout": MouseEvent;
+    "mouseover": MouseEvent;
+    "mouseup": MouseEvent;
+    "mousewheel": WheelEvent;
+    "MSContentZoom": UIEvent;
+    "MSGestureChange": MSGestureEvent;
+    "MSGestureDoubleTap": MSGestureEvent;
+    "MSGestureEnd": MSGestureEvent;
+    "MSGestureHold": MSGestureEvent;
+    "MSGestureStart": MSGestureEvent;
+    "MSGestureTap": MSGestureEvent;
+    "MSInertiaStart": MSGestureEvent;
+    "MSManipulationStateChanged": MSManipulationEvent;
+    "MSPointerCancel": MSPointerEvent;
+    "MSPointerDown": MSPointerEvent;
+    "MSPointerEnter": MSPointerEvent;
+    "MSPointerLeave": MSPointerEvent;
+    "MSPointerMove": MSPointerEvent;
+    "MSPointerOut": MSPointerEvent;
+    "MSPointerOver": MSPointerEvent;
+    "MSPointerUp": MSPointerEvent;
+    "mssitemodejumplistitemremoved": MSSiteModeEvent;
+    "msthumbnailclick": MSSiteModeEvent;
+    "pause": Event;
+    "play": Event;
+    "playing": Event;
+    "pointerlockchange": Event;
+    "pointerlockerror": Event;
+    "progress": ProgressEvent;
+    "ratechange": Event;
+    "readystatechange": Event;
+    "reset": Event;
+    "scroll": UIEvent;
+    "seeked": Event;
+    "seeking": Event;
+    "select": UIEvent;
+    "selectionchange": Event;
+    "selectstart": Event;
+    "stalled": Event;
+    "stop": Event;
+    "submit": Event;
+    "suspend": Event;
+    "timeupdate": Event;
+    "touchcancel": TouchEvent;
+    "touchend": TouchEvent;
+    "touchmove": TouchEvent;
+    "touchstart": TouchEvent;
+    "volumechange": Event;
+    "waiting": Event;
+    "webkitfullscreenchange": Event;
+    "webkitfullscreenerror": Event;
+}
+
+interface Document extends Node, GlobalEventHandlers, NodeSelector, DocumentEvent, ParentNode, DocumentOrShadowRoot {
+    /**
+     * Gets the object that has the focus when the parent document has focus.
+     */
+    readonly activeElement: Element;
+    /**
+     * Sets or gets the color of all active links in the document.
+     */
+    alinkColor: string;
+    /**
+     * Returns a reference to the collection of elements contained by the object.
+     */
+    readonly all: HTMLAllCollection;
+    /**
+     * Retrieves a collection of all a objects that have a name and/or id property. Objects in this collection are in HTML source order.
+     */
+    anchors: HTMLCollectionOf<HTMLAnchorElement>;
+    /**
+     * Retrieves a collection of all applet objects in the document.
+     */
+    applets: HTMLCollectionOf<HTMLAppletElement>;
+    /**
+     * Deprecated. Sets or retrieves a value that indicates the background color behind the object.
+     */
+    bgColor: string;
+    /**
+     * Specifies the beginning and end of the document body.
+     */
+    body: HTMLElement;
+    readonly characterSet: string;
+    /**
+     * Gets or sets the character set used to encode the object.
+     */
+    charset: string;
+    /**
+     * Gets a value that indicates whether standards-compliant mode is switched on for the object.
+     */
+    readonly compatMode: string;
+    cookie: string;
+    readonly currentScript: HTMLScriptElement | SVGScriptElement;
+    readonly defaultView: Window;
+    /**
+     * Sets or gets a value that indicates whether the document can be edited.
+     */
+    designMode: string;
+    /**
+     * Sets or retrieves a value that indicates the reading order of the object.
+     */
+    dir: string;
+    /**
+     * Gets an object representing the document type declaration associated with the current document.
+     */
+    readonly doctype: DocumentType;
+    /**
+     * Gets a reference to the root node of the document.
+     */
+    documentElement: HTMLElement;
+    /**
+     * Sets or gets the security domain of the document.
+     */
+    domain: string;
+    /**
+     * Retrieves a collection of all embed objects in the document.
+     */
+    embeds: HTMLCollectionOf<HTMLEmbedElement>;
+    /**
+     * Sets or gets the foreground (text) color of the document.
+     */
+    fgColor: string;
+    /**
+     * Retrieves a collection, in source order, of all form objects in the document.
+     */
+    forms: HTMLCollectionOf<HTMLFormElement>;
+    readonly fullscreenElement: Element | null;
+    readonly fullscreenEnabled: boolean;
+    readonly head: HTMLHeadElement;
+    readonly hidden: boolean;
+    /**
+     * Retrieves a collection, in source order, of img objects in the document.
+     */
+    images: HTMLCollectionOf<HTMLImageElement>;
+    /**
+     * Gets the implementation object of the current document.
+     */
+    readonly implementation: DOMImplementation;
+    /**
+     * Returns the character encoding used to create the webpage that is loaded into the document object.
+     */
+    readonly inputEncoding: string | null;
+    /**
+     * Gets the date that the page was last modified, if the page supplies one.
+     */
+    readonly lastModified: string;
+    /**
+     * Sets or gets the color of the document links.
+     */
+    linkColor: string;
+    /**
+     * Retrieves a collection of all a objects that specify the href property and all area objects in the document.
+     */
+    links: HTMLCollectionOf<HTMLAnchorElement | HTMLAreaElement>;
+    /**
+     * Contains information about the current URL.
+     */
+    readonly location: Location;
+    msCapsLockWarningOff: boolean;
+    msCSSOMElementFloatMetrics: boolean;
+    /**
+     * Fires when the user aborts the download.
+     * @param ev The event.
+     */
+    onabort: (this: Document, ev: UIEvent) => any;
+    /**
+     * Fires when the object is set as the active element.
+     * @param ev The event.
+     */
+    onactivate: (this: Document, ev: UIEvent) => any;
+    /**
+     * Fires immediately before the object is set as the active element.
+     * @param ev The event.
+     */
+    onbeforeactivate: (this: Document, ev: UIEvent) => any;
+    /**
+     * Fires immediately before the activeElement is changed from the current object to another object in the parent document.
+     * @param ev The event.
+     */
+    onbeforedeactivate: (this: Document, ev: UIEvent) => any;
+    /**
+     * Fires when the object loses the input focus.
+     * @param ev The focus event.
+     */
+    onblur: (this: Document, ev: FocusEvent) => any;
+    /**
+     * Occurs when playback is possible, but would require further buffering.
+     * @param ev The event.
+     */
+    oncanplay: (this: Document, ev: Event) => any;
+    oncanplaythrough: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the contents of the object or selection have changed.
+     * @param ev The event.
+     */
+    onchange: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the user clicks the left mouse button on the object
+     * @param ev The mouse event.
+     */
+    onclick: (this: Document, ev: MouseEvent) => any;
+    /**
+     * Fires when the user clicks the right mouse button in the client area, opening the context menu.
+     * @param ev The mouse event.
+     */
+    oncontextmenu: (this: Document, ev: PointerEvent) => any;
+    /**
+     * Fires when the user double-clicks the object.
+     * @param ev The mouse event.
+     */
+    ondblclick: (this: Document, ev: MouseEvent) => any;
+    /**
+     * Fires when the activeElement is changed from the current object to another object in the parent document.
+     * @param ev The UI Event
+     */
+    ondeactivate: (this: Document, ev: UIEvent) => any;
+    /**
+     * Fires on the source object continuously during a drag operation.
+     * @param ev The event.
+     */
+    ondrag: (this: Document, ev: DragEvent) => any;
+    /**
+     * Fires on the source object when the user releases the mouse at the close of a drag operation.
+     * @param ev The event.
+     */
+    ondragend: (this: Document, ev: DragEvent) => any;
+    /**
+     * Fires on the target element when the user drags the object to a valid drop target.
+     * @param ev The drag event.
+     */
+    ondragenter: (this: Document, ev: DragEvent) => any;
+    /**
+     * Fires on the target object when the user moves the mouse out of a valid drop target during a drag operation.
+     * @param ev The drag event.
+     */
+    ondragleave: (this: Document, ev: DragEvent) => any;
+    /**
+     * Fires on the target element continuously while the user drags the object over a valid drop target.
+     * @param ev The event.
+     */
+    ondragover: (this: Document, ev: DragEvent) => any;
+    /**
+     * Fires on the source object when the user starts to drag a text selection or selected object.
+     * @param ev The event.
+     */
+    ondragstart: (this: Document, ev: DragEvent) => any;
+    ondrop: (this: Document, ev: DragEvent) => any;
+    /**
+     * Occurs when the duration attribute is updated.
+     * @param ev The event.
+     */
+    ondurationchange: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when the media element is reset to its initial state.
+     * @param ev The event.
+     */
+    onemptied: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when the end of playback is reached.
+     * @param ev The event
+     */
+    onended: (this: Document, ev: MediaStreamErrorEvent) => any;
+    /**
+     * Fires when an error occurs during object loading.
+     * @param ev The event.
+     */
+    onerror: (this: Document, ev: ErrorEvent) => any;
+    /**
+     * Fires when the object receives focus.
+     * @param ev The event.
+     */
+    onfocus: (this: Document, ev: FocusEvent) => any;
+    onfullscreenchange: (this: Document, ev: Event) => any;
+    onfullscreenerror: (this: Document, ev: Event) => any;
+    oninput: (this: Document, ev: Event) => any;
+    oninvalid: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the user presses a key.
+     * @param ev The keyboard event
+     */
+    onkeydown: (this: Document, ev: KeyboardEvent) => any;
+    /**
+     * Fires when the user presses an alphanumeric key.
+     * @param ev The event.
+     */
+    onkeypress: (this: Document, ev: KeyboardEvent) => any;
+    /**
+     * Fires when the user releases a key.
+     * @param ev The keyboard event
+     */
+    onkeyup: (this: Document, ev: KeyboardEvent) => any;
+    /**
+     * Fires immediately after the browser loads the object.
+     * @param ev The event.
+     */
+    onload: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when media data is loaded at the current playback position.
+     * @param ev The event.
+     */
+    onloadeddata: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when the duration and dimensions of the media have been determined.
+     * @param ev The event.
+     */
+    onloadedmetadata: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when Internet Explorer begins looking for media data.
+     * @param ev The event.
+     */
+    onloadstart: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the user clicks the object with either mouse button.
+     * @param ev The mouse event.
+     */
+    onmousedown: (this: Document, ev: MouseEvent) => any;
+    /**
+     * Fires when the user moves the mouse over the object.
+     * @param ev The mouse event.
+     */
+    onmousemove: (this: Document, ev: MouseEvent) => any;
+    /**
+     * Fires when the user moves the mouse pointer outside the boundaries of the object.
+     * @param ev The mouse event.
+     */
+    onmouseout: (this: Document, ev: MouseEvent) => any;
+    /**
+     * Fires when the user moves the mouse pointer into the object.
+     * @param ev The mouse event.
+     */
+    onmouseover: (this: Document, ev: MouseEvent) => any;
+    /**
+     * Fires when the user releases a mouse button while the mouse is over the object.
+     * @param ev The mouse event.
+     */
+    onmouseup: (this: Document, ev: MouseEvent) => any;
+    /**
+     * Fires when the wheel button is rotated.
+     * @param ev The mouse event
+     */
+    onmousewheel: (this: Document, ev: WheelEvent) => any;
+    onmscontentzoom: (this: Document, ev: UIEvent) => any;
+    onmsgesturechange: (this: Document, ev: MSGestureEvent) => any;
+    onmsgesturedoubletap: (this: Document, ev: MSGestureEvent) => any;
+    onmsgestureend: (this: Document, ev: MSGestureEvent) => any;
+    onmsgesturehold: (this: Document, ev: MSGestureEvent) => any;
+    onmsgesturestart: (this: Document, ev: MSGestureEvent) => any;
+    onmsgesturetap: (this: Document, ev: MSGestureEvent) => any;
+    onmsinertiastart: (this: Document, ev: MSGestureEvent) => any;
+    onmsmanipulationstatechanged: (this: Document, ev: MSManipulationEvent) => any;
+    onmspointercancel: (this: Document, ev: MSPointerEvent) => any;
+    onmspointerdown: (this: Document, ev: MSPointerEvent) => any;
+    onmspointerenter: (this: Document, ev: MSPointerEvent) => any;
+    onmspointerleave: (this: Document, ev: MSPointerEvent) => any;
+    onmspointermove: (this: Document, ev: MSPointerEvent) => any;
+    onmspointerout: (this: Document, ev: MSPointerEvent) => any;
+    onmspointerover: (this: Document, ev: MSPointerEvent) => any;
+    onmspointerup: (this: Document, ev: MSPointerEvent) => any;
+    /**
+     * Occurs when an item is removed from a Jump List of a webpage running in Site Mode.
+     * @param ev The event.
+     */
+    onmssitemodejumplistitemremoved: (this: Document, ev: MSSiteModeEvent) => any;
+    /**
+     * Occurs when a user clicks a button in a Thumbnail Toolbar of a webpage running in Site Mode.
+     * @param ev The event.
+     */
+    onmsthumbnailclick: (this: Document, ev: MSSiteModeEvent) => any;
+    /**
+     * Occurs when playback is paused.
+     * @param ev The event.
+     */
+    onpause: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when the play method is requested.
+     * @param ev The event.
+     */
+    onplay: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when the audio or video has started playing.
+     * @param ev The event.
+     */
+    onplaying: (this: Document, ev: Event) => any;
+    onpointerlockchange: (this: Document, ev: Event) => any;
+    onpointerlockerror: (this: Document, ev: Event) => any;
+    /**
+     * Occurs to indicate progress while downloading media data.
+     * @param ev The event.
+     */
+    onprogress: (this: Document, ev: ProgressEvent) => any;
+    /**
+     * Occurs when the playback rate is increased or decreased.
+     * @param ev The event.
+     */
+    onratechange: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the state of the object has changed.
+     * @param ev The event
+     */
+    onreadystatechange: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the user resets a form.
+     * @param ev The event.
+     */
+    onreset: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the user repositions the scroll box in the scroll bar on the object.
+     * @param ev The event.
+     */
+    onscroll: (this: Document, ev: UIEvent) => any;
+    /**
+     * Occurs when the seek operation ends.
+     * @param ev The event.
+     */
+    onseeked: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when the current playback position is moved.
+     * @param ev The event.
+     */
+    onseeking: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the current selection changes.
+     * @param ev The event.
+     */
+    onselect: (this: Document, ev: UIEvent) => any;
+    /**
+     * Fires when the selection state of a document changes.
+     * @param ev The event.
+     */
+    onselectionchange: (this: Document, ev: Event) => any;
+    onselectstart: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when the download has stopped.
+     * @param ev The event.
+     */
+    onstalled: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the user clicks the Stop button or leaves the Web page.
+     * @param ev The event.
+     */
+    onstop: (this: Document, ev: Event) => any;
+    onsubmit: (this: Document, ev: Event) => any;
+    /**
+     * Occurs if the load operation has been intentionally halted.
+     * @param ev The event.
+     */
+    onsuspend: (this: Document, ev: Event) => any;
+    /**
+     * Occurs to indicate the current playback position.
+     * @param ev The event.
+     */
+    ontimeupdate: (this: Document, ev: Event) => any;
+    ontouchcancel: (ev: TouchEvent) => any;
+    ontouchend: (ev: TouchEvent) => any;
+    ontouchmove: (ev: TouchEvent) => any;
+    ontouchstart: (ev: TouchEvent) => any;
+    /**
+     * Occurs when the volume is changed, or playback is muted or unmuted.
+     * @param ev The event.
+     */
+    onvolumechange: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when playback stops because the next frame of a video resource is not available.
+     * @param ev The event.
+     */
+    onwaiting: (this: Document, ev: Event) => any;
+    onwebkitfullscreenchange: (this: Document, ev: Event) => any;
+    onwebkitfullscreenerror: (this: Document, ev: Event) => any;
+    plugins: HTMLCollectionOf<HTMLEmbedElement>;
+    readonly pointerLockElement: Element;
+    /**
+     * Retrieves a value that indicates the current state of the object.
+     */
+    readonly readyState: string;
+    /**
+     * Gets the URL of the location that referred the user to the current page.
+     */
+    readonly referrer: string;
+    /**
+     * Gets the root svg element in the document hierarchy.
+     */
+    readonly rootElement: SVGSVGElement;
+    /**
+     * Retrieves a collection of all script objects in the document.
+     */
+    scripts: HTMLCollectionOf<HTMLScriptElement>;
+    readonly scrollingElement: Element | null;
+    /**
+     * Retrieves a collection of styleSheet objects representing the style sheets that correspond to each instance of a link or style object in the document.
+     */
+    readonly styleSheets: StyleSheetList;
+    /**
+     * Contains the title of the document.
+     */
+    title: string;
+    /**
+     * Sets or gets the URL for the current document.
+     */
+    readonly URL: string;
+    /**
+     * Gets the URL for the document, stripped of any character encoding.
+     */
+    readonly URLUnencoded: string;
+    readonly visibilityState: VisibilityState;
+    /**
+     * Sets or gets the color of the links that the user has visited.
+     */
+    vlinkColor: string;
+    readonly webkitCurrentFullScreenElement: Element | null;
+    readonly webkitFullscreenElement: Element | null;
+    readonly webkitFullscreenEnabled: boolean;
+    readonly webkitIsFullScreen: boolean;
+    readonly xmlEncoding: string | null;
+    xmlStandalone: boolean;
+    /**
+     * Gets or sets the version attribute specified in the declaration of an XML document.
+     */
+    xmlVersion: string | null;
+    adoptNode<T extends Node>(source: T): T;
+    captureEvents(): void;
+    caretRangeFromPoint(x: number, y: number): Range;
+    clear(): void;
+    /**
+     * Closes an output stream and forces the sent data to display.
+     */
+    close(): void;
+    /**
+     * Creates an attribute object with a specified name.
+     * @param name String that sets the attribute object's name.
+     */
+    createAttribute(name: string): Attr;
+    createAttributeNS(namespaceURI: string | null, qualifiedName: string): Attr;
+    createCDATASection(data: string): CDATASection;
+    /**
+     * Creates a comment object with the specified data.
+     * @param data Sets the comment object's data.
+     */
+    createComment(data: string): Comment;
+    /**
+     * Creates a new document.
+     */
+    createDocumentFragment(): DocumentFragment;
+    /**
+     * Creates an instance of the element for the specified tag.
+     * @param tagName The name of an element.
+     */
+    createElement<K extends keyof HTMLElementTagNameMap>(tagName: K): HTMLElementTagNameMap[K];
+    createElement(tagName: string): HTMLElement;
+    createElementNS(namespaceURI: "http://www.w3.org/1999/xhtml", qualifiedName: string): HTMLElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "a"): SVGAElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "circle"): SVGCircleElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "clipPath"): SVGClipPathElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "componentTransferFunction"): SVGComponentTransferFunctionElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "defs"): SVGDefsElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "desc"): SVGDescElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "ellipse"): SVGEllipseElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feBlend"): SVGFEBlendElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feColorMatrix"): SVGFEColorMatrixElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feComponentTransfer"): SVGFEComponentTransferElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feComposite"): SVGFECompositeElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feConvolveMatrix"): SVGFEConvolveMatrixElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feDiffuseLighting"): SVGFEDiffuseLightingElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feDisplacementMap"): SVGFEDisplacementMapElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feDistantLight"): SVGFEDistantLightElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feFlood"): SVGFEFloodElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feFuncA"): SVGFEFuncAElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feFuncB"): SVGFEFuncBElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feFuncG"): SVGFEFuncGElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feFuncR"): SVGFEFuncRElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feGaussianBlur"): SVGFEGaussianBlurElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feImage"): SVGFEImageElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feMerge"): SVGFEMergeElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feMergeNode"): SVGFEMergeNodeElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feMorphology"): SVGFEMorphologyElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feOffset"): SVGFEOffsetElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "fePointLight"): SVGFEPointLightElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feSpecularLighting"): SVGFESpecularLightingElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feSpotLight"): SVGFESpotLightElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feTile"): SVGFETileElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feTurbulence"): SVGFETurbulenceElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "filter"): SVGFilterElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "foreignObject"): SVGForeignObjectElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "g"): SVGGElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "image"): SVGImageElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "gradient"): SVGGradientElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "line"): SVGLineElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "linearGradient"): SVGLinearGradientElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "marker"): SVGMarkerElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "mask"): SVGMaskElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "path"): SVGPathElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "metadata"): SVGMetadataElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "pattern"): SVGPatternElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "polygon"): SVGPolygonElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "polyline"): SVGPolylineElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "radialGradient"): SVGRadialGradientElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "rect"): SVGRectElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "svg"): SVGSVGElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "script"): SVGScriptElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "stop"): SVGStopElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "style"): SVGStyleElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "switch"): SVGSwitchElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "symbol"): SVGSymbolElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "tspan"): SVGTSpanElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "textContent"): SVGTextContentElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "text"): SVGTextElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "textPath"): SVGTextPathElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "textPositioning"): SVGTextPositioningElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "title"): SVGTitleElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "use"): SVGUseElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "view"): SVGViewElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: string): SVGElement;
+    createElementNS(namespaceURI: string | null, qualifiedName: string): Element;
+    createExpression(expression: string, resolver: XPathNSResolver): XPathExpression;
+    /**
+     * Creates a NodeIterator object that you can use to traverse filtered lists of nodes or elements in a document.
+     * @param root The root element or node to start traversing on.
+     * @param whatToShow The type of nodes or elements to appear in the node list
+     * @param filter A custom NodeFilter function to use. For more information, see filter. Use null for no filter.
+     * @param entityReferenceExpansion A flag that specifies whether entity reference nodes are expanded.
+     */
+    createNodeIterator(root: Node, whatToShow?: number, filter?: NodeFilter, entityReferenceExpansion?: boolean): NodeIterator;
+    createNSResolver(nodeResolver: Node): XPathNSResolver;
+    createProcessingInstruction(target: string, data: string): ProcessingInstruction;
+    /**
+     *  Returns an empty range object that has both of its boundary points positioned at the beginning of the document.
+     */
+    createRange(): Range;
+    /**
+     * Creates a text string from the specified value.
+     * @param data String that specifies the nodeValue property of the text node.
+     */
+    createTextNode(data: string): Text;
+    createTouch(view: Window, target: EventTarget, identifier: number, pageX: number, pageY: number, screenX: number, screenY: number): Touch;
+    createTouchList(...touches: Touch[]): TouchList;
+    /**
+     * Creates a TreeWalker object that you can use to traverse filtered lists of nodes or elements in a document.
+     * @param root The root element or node to start traversing on.
+     * @param whatToShow The type of nodes or elements to appear in the node list. For more information, see whatToShow.
+     * @param filter A custom NodeFilter function to use.
+     * @param entityReferenceExpansion A flag that specifies whether entity reference nodes are expanded.
+     */
+    createTreeWalker(root: Node, whatToShow?: number, filter?: NodeFilter, entityReferenceExpansion?: boolean): TreeWalker;
+    /**
+     * Returns the element for the specified x coordinate and the specified y coordinate.
+     * @param x The x-offset
+     * @param y The y-offset
+     */
+    elementFromPoint(x: number, y: number): Element;
+    evaluate(expression: string, contextNode: Node, resolver: XPathNSResolver | null, type: number, result: XPathResult | null): XPathResult;
+    /**
+     * Executes a command on the current document, current selection, or the given range.
+     * @param commandId String that specifies the command to execute. This command can be any of the command identifiers that can be executed in script.
+     * @param showUI Display the user interface, defaults to false.
+     * @param value Value to assign.
+     */
+    execCommand(commandId: string, showUI?: boolean, value?: any): boolean;
+    /**
+     * Displays help information for the given command identifier.
+     * @param commandId Displays help information for the given command identifier.
+     */
+    execCommandShowHelp(commandId: string): boolean;
+    exitFullscreen(): void;
+    exitPointerLock(): void;
+    /**
+     * Causes the element to receive the focus and executes the code specified by the onfocus event.
+     */
+    focus(): void;
+    /**
+     * Returns a reference to the first object with the specified value of the ID or NAME attribute.
+     * @param elementId String that specifies the ID value. Case-insensitive.
+     */
+    getElementById(elementId: string): HTMLElement | null;
+    getElementsByClassName(classNames: string): HTMLCollectionOf<Element>;
+    /**
+     * Gets a collection of objects based on the value of the NAME or ID attribute.
+     * @param elementName Gets a collection of objects based on the value of the NAME or ID attribute.
+     */
+    getElementsByName(elementName: string): NodeListOf<HTMLElement>;
+    /**
+     * Retrieves a collection of objects based on the specified element name.
+     * @param name Specifies the name of an element.
+     */
+    getElementsByTagName<K extends keyof ElementListTagNameMap>(tagname: K): ElementListTagNameMap[K];
+    getElementsByTagName(tagname: string): NodeListOf<Element>;
+    getElementsByTagNameNS(namespaceURI: "http://www.w3.org/1999/xhtml", localName: string): HTMLCollectionOf<HTMLElement>;
+    getElementsByTagNameNS(namespaceURI: "http://www.w3.org/2000/svg", localName: string): HTMLCollectionOf<SVGElement>;
+    getElementsByTagNameNS(namespaceURI: string, localName: string): HTMLCollectionOf<Element>;
+    /**
+     * Returns an object representing the current selection of the document that is loaded into the object displaying a webpage.
+     */
+    getSelection(): Selection;
+    /**
+     * Gets a value indicating whether the object currently has focus.
+     */
+    hasFocus(): boolean;
+    importNode<T extends Node>(importedNode: T, deep: boolean): T;
+    msElementsFromPoint(x: number, y: number): NodeListOf<Element>;
+    msElementsFromRect(left: number, top: number, width: number, height: number): NodeListOf<Element>;
+    /**
+     * Opens a new window and loads a document specified by a given URL. Also, opens a new window that uses the url parameter and the name parameter to collect the output of the write method and the writeln method.
+     * @param url Specifies a MIME type for the document.
+     * @param name Specifies the name of the window. This name is used as the value for the TARGET attribute on a form or an anchor element.
+     * @param features Contains a list of items separated by commas. Each item consists of an option and a value, separated by an equals sign (for example, "fullscreen=yes, toolbar=yes"). The following values are supported.
+     * @param replace Specifies whether the existing entry for the document is replaced in the history list.
+     */
+    open(url?: string, name?: string, features?: string, replace?: boolean): Document;
+    /**
+     * Returns a Boolean value that indicates whether a specified command can be successfully executed using execCommand, given the current state of the document.
+     * @param commandId Specifies a command identifier.
+     */
+    queryCommandEnabled(commandId: string): boolean;
+    /**
+     * Returns a Boolean value that indicates whether the specified command is in the indeterminate state.
+     * @param commandId String that specifies a command identifier.
+     */
+    queryCommandIndeterm(commandId: string): boolean;
+    /**
+     * Returns a Boolean value that indicates the current state of the command.
+     * @param commandId String that specifies a command identifier.
+     */
+    queryCommandState(commandId: string): boolean;
+    /**
+     * Returns a Boolean value that indicates whether the current command is supported on the current range.
+     * @param commandId Specifies a command identifier.
+     */
+    queryCommandSupported(commandId: string): boolean;
+    /**
+     * Retrieves the string associated with a command.
+     * @param commandId String that contains the identifier of a command. This can be any command identifier given in the list of Command Identifiers.
+     */
+    queryCommandText(commandId: string): string;
+    /**
+     * Returns the current value of the document, range, or current selection for the given command.
+     * @param commandId String that specifies a command identifier.
+     */
+    queryCommandValue(commandId: string): string;
+    releaseEvents(): void;
+    /**
+     * Allows updating the print settings for the page.
+     */
+    updateSettings(): void;
+    webkitCancelFullScreen(): void;
+    webkitExitFullscreen(): void;
+    /**
+     * Writes one or more HTML expressions to a document in the specified window.
+     * @param content Specifies the text and HTML tags to write.
+     */
+    write(...content: string[]): void;
+    /**
+     * Writes one or more HTML expressions, followed by a carriage return, to a document in the specified window.
+     * @param content The text and HTML tags to write.
+     */
+    writeln(...content: string[]): void;
+    addEventListener<K extends keyof DocumentEventMap>(type: K, listener: (this: Document, ev: DocumentEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var Document: {
+    prototype: Document;
+    new(): Document;
+};
+
+interface DocumentFragment extends Node, NodeSelector, ParentNode {
+    getElementById(elementId: string): HTMLElement | null;
+}
+
+declare var DocumentFragment: {
+    prototype: DocumentFragment;
+    new(): DocumentFragment;
+};
+
+interface DocumentType extends Node, ChildNode {
+    readonly entities: NamedNodeMap;
+    readonly internalSubset: string | null;
+    readonly name: string;
+    readonly notations: NamedNodeMap;
+    readonly publicId: string;
+    readonly systemId: string;
+}
+
+declare var DocumentType: {
+    prototype: DocumentType;
+    new(): DocumentType;
+};
+
+interface DOMError {
+    readonly name: string;
+    toString(): string;
+}
+
+declare var DOMError: {
+    prototype: DOMError;
+    new(): DOMError;
+};
+
+interface DOMException {
+    readonly code: number;
+    readonly message: string;
+    readonly name: string;
+    toString(): string;
+    readonly ABORT_ERR: number;
+    readonly DATA_CLONE_ERR: number;
+    readonly DOMSTRING_SIZE_ERR: number;
+    readonly HIERARCHY_REQUEST_ERR: number;
+    readonly INDEX_SIZE_ERR: number;
+    readonly INUSE_ATTRIBUTE_ERR: number;
+    readonly INVALID_ACCESS_ERR: number;
+    readonly INVALID_CHARACTER_ERR: number;
+    readonly INVALID_MODIFICATION_ERR: number;
+    readonly INVALID_NODE_TYPE_ERR: number;
+    readonly INVALID_STATE_ERR: number;
+    readonly NAMESPACE_ERR: number;
+    readonly NETWORK_ERR: number;
+    readonly NO_DATA_ALLOWED_ERR: number;
+    readonly NO_MODIFICATION_ALLOWED_ERR: number;
+    readonly NOT_FOUND_ERR: number;
+    readonly NOT_SUPPORTED_ERR: number;
+    readonly PARSE_ERR: number;
+    readonly QUOTA_EXCEEDED_ERR: number;
+    readonly SECURITY_ERR: number;
+    readonly SERIALIZE_ERR: number;
+    readonly SYNTAX_ERR: number;
+    readonly TIMEOUT_ERR: number;
+    readonly TYPE_MISMATCH_ERR: number;
+    readonly URL_MISMATCH_ERR: number;
+    readonly VALIDATION_ERR: number;
+    readonly WRONG_DOCUMENT_ERR: number;
+}
+
+declare var DOMException: {
+    prototype: DOMException;
+    new(): DOMException;
+    readonly ABORT_ERR: number;
+    readonly DATA_CLONE_ERR: number;
+    readonly DOMSTRING_SIZE_ERR: number;
+    readonly HIERARCHY_REQUEST_ERR: number;
+    readonly INDEX_SIZE_ERR: number;
+    readonly INUSE_ATTRIBUTE_ERR: number;
+    readonly INVALID_ACCESS_ERR: number;
+    readonly INVALID_CHARACTER_ERR: number;
+    readonly INVALID_MODIFICATION_ERR: number;
+    readonly INVALID_NODE_TYPE_ERR: number;
+    readonly INVALID_STATE_ERR: number;
+    readonly NAMESPACE_ERR: number;
+    readonly NETWORK_ERR: number;
+    readonly NO_DATA_ALLOWED_ERR: number;
+    readonly NO_MODIFICATION_ALLOWED_ERR: number;
+    readonly NOT_FOUND_ERR: number;
+    readonly NOT_SUPPORTED_ERR: number;
+    readonly PARSE_ERR: number;
+    readonly QUOTA_EXCEEDED_ERR: number;
+    readonly SECURITY_ERR: number;
+    readonly SERIALIZE_ERR: number;
+    readonly SYNTAX_ERR: number;
+    readonly TIMEOUT_ERR: number;
+    readonly TYPE_MISMATCH_ERR: number;
+    readonly URL_MISMATCH_ERR: number;
+    readonly VALIDATION_ERR: number;
+    readonly WRONG_DOCUMENT_ERR: number;
+};
+
+interface DOMImplementation {
+    createDocument(namespaceURI: string | null, qualifiedName: string | null, doctype: DocumentType | null): Document;
+    createDocumentType(qualifiedName: string, publicId: string, systemId: string): DocumentType;
+    createHTMLDocument(title: string): Document;
+    hasFeature(feature: string | null, version: string | null): boolean;
+}
+
+declare var DOMImplementation: {
+    prototype: DOMImplementation;
+    new(): DOMImplementation;
+};
+
+interface DOMParser {
+    parseFromString(source: string, mimeType: string): Document;
+}
+
+declare var DOMParser: {
+    prototype: DOMParser;
+    new(): DOMParser;
+};
+
+interface DOMSettableTokenList extends DOMTokenList {
+    value: string;
+}
+
+declare var DOMSettableTokenList: {
+    prototype: DOMSettableTokenList;
+    new(): DOMSettableTokenList;
+};
+
+interface DOMStringList {
+    readonly length: number;
+    contains(str: string): boolean;
+    item(index: number): string | null;
+    [index: number]: string;
+}
+
+declare var DOMStringList: {
+    prototype: DOMStringList;
+    new(): DOMStringList;
+};
+
+interface DOMStringMap {
+    [name: string]: string | undefined;
+}
+
+declare var DOMStringMap: {
+    prototype: DOMStringMap;
+    new(): DOMStringMap;
+};
+
+interface DOMTokenList {
+    readonly length: number;
+    add(...token: string[]): void;
+    contains(token: string): boolean;
+    item(index: number): string;
+    remove(...token: string[]): void;
+    toggle(token: string, force?: boolean): boolean;
+    toString(): string;
+    [index: number]: string;
+}
+
+declare var DOMTokenList: {
+    prototype: DOMTokenList;
+    new(): DOMTokenList;
+};
+
+interface DragEvent extends MouseEvent {
+    readonly dataTransfer: DataTransfer;
+    initDragEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, ctrlKeyArg: boolean, altKeyArg: boolean, shiftKeyArg: boolean, metaKeyArg: boolean, buttonArg: number, relatedTargetArg: EventTarget, dataTransferArg: DataTransfer): void;
+    msConvertURL(file: File, targetType: string, targetURL?: string): void;
+}
+
+declare var DragEvent: {
+    prototype: DragEvent;
+    new(type: "drag" | "dragend" | "dragenter" | "dragexit" | "dragleave" | "dragover" | "dragstart" | "drop", dragEventInit?: { dataTransfer?: DataTransfer }): DragEvent;
+};
+
+interface DynamicsCompressorNode extends AudioNode {
+    readonly attack: AudioParam;
+    readonly knee: AudioParam;
+    readonly ratio: AudioParam;
+    readonly reduction: number;
+    readonly release: AudioParam;
+    readonly threshold: AudioParam;
+}
+
+declare var DynamicsCompressorNode: {
+    prototype: DynamicsCompressorNode;
+    new(): DynamicsCompressorNode;
+};
+
+interface ElementEventMap extends GlobalEventHandlersEventMap {
+    "ariarequest": Event;
+    "command": Event;
+    "gotpointercapture": PointerEvent;
+    "lostpointercapture": PointerEvent;
+    "MSGestureChange": MSGestureEvent;
+    "MSGestureDoubleTap": MSGestureEvent;
+    "MSGestureEnd": MSGestureEvent;
+    "MSGestureHold": MSGestureEvent;
+    "MSGestureStart": MSGestureEvent;
+    "MSGestureTap": MSGestureEvent;
+    "MSGotPointerCapture": MSPointerEvent;
+    "MSInertiaStart": MSGestureEvent;
+    "MSLostPointerCapture": MSPointerEvent;
+    "MSPointerCancel": MSPointerEvent;
+    "MSPointerDown": MSPointerEvent;
+    "MSPointerEnter": MSPointerEvent;
+    "MSPointerLeave": MSPointerEvent;
+    "MSPointerMove": MSPointerEvent;
+    "MSPointerOut": MSPointerEvent;
+    "MSPointerOver": MSPointerEvent;
+    "MSPointerUp": MSPointerEvent;
+    "touchcancel": TouchEvent;
+    "touchend": TouchEvent;
+    "touchmove": TouchEvent;
+    "touchstart": TouchEvent;
+    "webkitfullscreenchange": Event;
+    "webkitfullscreenerror": Event;
+}
+
+interface Element extends Node, GlobalEventHandlers, ElementTraversal, NodeSelector, ChildNode, ParentNode {
+    readonly classList: DOMTokenList;
+    className: string;
+    readonly clientHeight: number;
+    readonly clientLeft: number;
+    readonly clientTop: number;
+    readonly clientWidth: number;
+    id: string;
+    innerHTML: string;
+    msContentZoomFactor: number;
+    readonly msRegionOverflow: string;
+    onariarequest: (this: Element, ev: Event) => any;
+    oncommand: (this: Element, ev: Event) => any;
+    ongotpointercapture: (this: Element, ev: PointerEvent) => any;
+    onlostpointercapture: (this: Element, ev: PointerEvent) => any;
+    onmsgesturechange: (this: Element, ev: MSGestureEvent) => any;
+    onmsgesturedoubletap: (this: Element, ev: MSGestureEvent) => any;
+    onmsgestureend: (this: Element, ev: MSGestureEvent) => any;
+    onmsgesturehold: (this: Element, ev: MSGestureEvent) => any;
+    onmsgesturestart: (this: Element, ev: MSGestureEvent) => any;
+    onmsgesturetap: (this: Element, ev: MSGestureEvent) => any;
+    onmsgotpointercapture: (this: Element, ev: MSPointerEvent) => any;
+    onmsinertiastart: (this: Element, ev: MSGestureEvent) => any;
+    onmslostpointercapture: (this: Element, ev: MSPointerEvent) => any;
+    onmspointercancel: (this: Element, ev: MSPointerEvent) => any;
+    onmspointerdown: (this: Element, ev: MSPointerEvent) => any;
+    onmspointerenter: (this: Element, ev: MSPointerEvent) => any;
+    onmspointerleave: (this: Element, ev: MSPointerEvent) => any;
+    onmspointermove: (this: Element, ev: MSPointerEvent) => any;
+    onmspointerout: (this: Element, ev: MSPointerEvent) => any;
+    onmspointerover: (this: Element, ev: MSPointerEvent) => any;
+    onmspointerup: (this: Element, ev: MSPointerEvent) => any;
+    ontouchcancel: (ev: TouchEvent) => any;
+    ontouchend: (ev: TouchEvent) => any;
+    ontouchmove: (ev: TouchEvent) => any;
+    ontouchstart: (ev: TouchEvent) => any;
+    onwebkitfullscreenchange: (this: Element, ev: Event) => any;
+    onwebkitfullscreenerror: (this: Element, ev: Event) => any;
+    outerHTML: string;
+    readonly prefix: string | null;
+    readonly scrollHeight: number;
+    scrollLeft: number;
+    scrollTop: number;
+    readonly scrollWidth: number;
+    readonly tagName: string;
+    readonly assignedSlot: HTMLSlotElement | null;
+    slot: string;
+    readonly shadowRoot: ShadowRoot | null;
+    getAttribute(name: string): string | null;
+    getAttributeNode(name: string): Attr;
+    getAttributeNodeNS(namespaceURI: string, localName: string): Attr;
+    getAttributeNS(namespaceURI: string, localName: string): string;
+    getBoundingClientRect(): ClientRect;
+    getClientRects(): ClientRectList;
+    getElementsByTagName<K extends keyof ElementListTagNameMap>(name: K): ElementListTagNameMap[K];
+    getElementsByTagName(name: string): NodeListOf<Element>;
+    getElementsByTagNameNS(namespaceURI: "http://www.w3.org/1999/xhtml", localName: string): HTMLCollectionOf<HTMLElement>;
+    getElementsByTagNameNS(namespaceURI: "http://www.w3.org/2000/svg", localName: string): HTMLCollectionOf<SVGElement>;
+    getElementsByTagNameNS(namespaceURI: string, localName: string): HTMLCollectionOf<Element>;
+    hasAttribute(name: string): boolean;
+    hasAttributeNS(namespaceURI: string, localName: string): boolean;
+    msGetRegionContent(): MSRangeCollection;
+    msGetUntransformedBounds(): ClientRect;
+    msMatchesSelector(selectors: string): boolean;
+    msReleasePointerCapture(pointerId: number): void;
+    msSetPointerCapture(pointerId: number): void;
+    msZoomTo(args: MsZoomToOptions): void;
+    releasePointerCapture(pointerId: number): void;
+    removeAttribute(qualifiedName: string): void;
+    removeAttributeNode(oldAttr: Attr): Attr;
+    removeAttributeNS(namespaceURI: string, localName: string): void;
+    requestFullscreen(): void;
+    requestPointerLock(): void;
+    setAttribute(name: string, value: string): void;
+    setAttributeNode(newAttr: Attr): Attr;
+    setAttributeNodeNS(newAttr: Attr): Attr;
+    setAttributeNS(namespaceURI: string, qualifiedName: string, value: string): void;
+    setPointerCapture(pointerId: number): void;
+    webkitMatchesSelector(selectors: string): boolean;
+    webkitRequestFullscreen(): void;
+    webkitRequestFullScreen(): void;
+    getElementsByClassName(classNames: string): NodeListOf<Element>;
+    matches(selector: string): boolean;
+    closest(selector: string): Element | null;
+    scrollIntoView(arg?: boolean | ScrollIntoViewOptions): void;
+    scroll(options?: ScrollToOptions): void;
+    scroll(x: number, y: number): void;
+    scrollTo(options?: ScrollToOptions): void;
+    scrollTo(x: number, y: number): void;
+    scrollBy(options?: ScrollToOptions): void;
+    scrollBy(x: number, y: number): void;
+    insertAdjacentElement(position: InsertPosition, insertedElement: Element): Element | null;
+    insertAdjacentHTML(where: InsertPosition, html: string): void;
+    insertAdjacentText(where: InsertPosition, text: string): void;
+    attachShadow(shadowRootInitDict: ShadowRootInit): ShadowRoot;
+    addEventListener<K extends keyof ElementEventMap>(type: K, listener: (this: Element, ev: ElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var Element: {
+    prototype: Element;
+    new(): Element;
+};
+
+interface ErrorEvent extends Event {
+    readonly colno: number;
+    readonly error: any;
+    readonly filename: string;
+    readonly lineno: number;
+    readonly message: string;
+    initErrorEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, messageArg: string, filenameArg: string, linenoArg: number): void;
+}
+
+declare var ErrorEvent: {
+    prototype: ErrorEvent;
+    new(type: string, errorEventInitDict?: ErrorEventInit): ErrorEvent;
+};
+
+interface Event {
+    readonly bubbles: boolean;
+    readonly cancelable: boolean;
+    cancelBubble: boolean;
+    readonly currentTarget: EventTarget;
+    readonly defaultPrevented: boolean;
+    readonly eventPhase: number;
+    readonly isTrusted: boolean;
+    returnValue: boolean;
+    readonly srcElement: Element | null;
+    readonly target: EventTarget;
+    readonly timeStamp: number;
+    readonly type: string;
+    readonly scoped: boolean;
+    initEvent(eventTypeArg: string, canBubbleArg: boolean, cancelableArg: boolean): void;
+    preventDefault(): void;
+    stopImmediatePropagation(): void;
+    stopPropagation(): void;
+    deepPath(): EventTarget[];
+    readonly AT_TARGET: number;
+    readonly BUBBLING_PHASE: number;
+    readonly CAPTURING_PHASE: number;
+}
+
+declare var Event: {
+    prototype: Event;
+    new(typeArg: string, eventInitDict?: EventInit): Event;
+    readonly AT_TARGET: number;
+    readonly BUBBLING_PHASE: number;
+    readonly CAPTURING_PHASE: number;
+};
+
+interface EventTarget {
+    addEventListener(type: string, listener?: EventListenerOrEventListenerObject, options?: boolean | AddEventListenerOptions): void;
+    dispatchEvent(evt: Event): boolean;
+    removeEventListener(type: string, listener?: EventListenerOrEventListenerObject, options?: boolean | EventListenerOptions): void;
+}
+
+declare var EventTarget: {
+    prototype: EventTarget;
+    new(): EventTarget;
+};
+
+interface EXT_frag_depth {
+}
+
+declare var EXT_frag_depth: {
+    prototype: EXT_frag_depth;
+    new(): EXT_frag_depth;
+};
+
+interface EXT_texture_filter_anisotropic {
+    readonly MAX_TEXTURE_MAX_ANISOTROPY_EXT: number;
+    readonly TEXTURE_MAX_ANISOTROPY_EXT: number;
+}
+
+declare var EXT_texture_filter_anisotropic: {
+    prototype: EXT_texture_filter_anisotropic;
+    new(): EXT_texture_filter_anisotropic;
+    readonly MAX_TEXTURE_MAX_ANISOTROPY_EXT: number;
+    readonly TEXTURE_MAX_ANISOTROPY_EXT: number;
+};
+
+interface ExtensionScriptApis {
+    extensionIdToShortId(extensionId: string): number;
+    fireExtensionApiTelemetry(functionName: string, isSucceeded: boolean, isSupported: boolean): void;
+    genericFunction(routerAddress: any, parameters?: string, callbackId?: number): void;
+    genericSynchronousFunction(functionId: number, parameters?: string): string;
+    getExtensionId(): string;
+    registerGenericFunctionCallbackHandler(callbackHandler: any): void;
+    registerGenericPersistentCallbackHandler(callbackHandler: any): void;
+}
+
+declare var ExtensionScriptApis: {
+    prototype: ExtensionScriptApis;
+    new(): ExtensionScriptApis;
+};
+
+interface External {
+}
+
+declare var External: {
+    prototype: External;
+    new(): External;
+};
+
+interface File extends Blob {
+    readonly lastModifiedDate: any;
+    readonly name: string;
+    readonly webkitRelativePath: string;
+}
+
+declare var File: {
+    prototype: File;
+    new (parts: (ArrayBuffer | ArrayBufferView | Blob | string)[], filename: string, properties?: FilePropertyBag): File;
+};
+
+interface FileList {
+    readonly length: number;
+    item(index: number): File;
+    [index: number]: File;
+}
+
+declare var FileList: {
+    prototype: FileList;
+    new(): FileList;
+};
+
+interface FileReader extends EventTarget, MSBaseReader {
+    readonly error: DOMError;
+    readAsArrayBuffer(blob: Blob): void;
+    readAsBinaryString(blob: Blob): void;
+    readAsDataURL(blob: Blob): void;
+    readAsText(blob: Blob, encoding?: string): void;
+    addEventListener<K extends keyof MSBaseReaderEventMap>(type: K, listener: (this: FileReader, ev: MSBaseReaderEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var FileReader: {
+    prototype: FileReader;
+    new(): FileReader;
+};
+
+interface FocusEvent extends UIEvent {
+    readonly relatedTarget: EventTarget;
+    initFocusEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, relatedTargetArg: EventTarget): void;
+}
+
+declare var FocusEvent: {
+    prototype: FocusEvent;
+    new(typeArg: string, eventInitDict?: FocusEventInit): FocusEvent;
+};
+
+interface FocusNavigationEvent extends Event {
+    readonly navigationReason: NavigationReason;
+    readonly originHeight: number;
+    readonly originLeft: number;
+    readonly originTop: number;
+    readonly originWidth: number;
+    requestFocus(): void;
+}
+
+declare var FocusNavigationEvent: {
+    prototype: FocusNavigationEvent;
+    new(type: string, eventInitDict?: FocusNavigationEventInit): FocusNavigationEvent;
+};
+
+interface FormData {
+    append(name: string, value: string | Blob, fileName?: string): void;
+    delete(name: string): void;
+    get(name: string): FormDataEntryValue | null;
+    getAll(name: string): FormDataEntryValue[];
+    has(name: string): boolean;
+    set(name: string, value: string | Blob, fileName?: string): void;
+}
+
+declare var FormData: {
+    prototype: FormData;
+    new (form?: HTMLFormElement): FormData;
+};
+
+interface GainNode extends AudioNode {
+    readonly gain: AudioParam;
+}
+
+declare var GainNode: {
+    prototype: GainNode;
+    new(): GainNode;
+};
+
+interface Gamepad {
+    readonly axes: number[];
+    readonly buttons: GamepadButton[];
+    readonly connected: boolean;
+    readonly id: string;
+    readonly index: number;
+    readonly mapping: string;
+    readonly timestamp: number;
+}
+
+declare var Gamepad: {
+    prototype: Gamepad;
+    new(): Gamepad;
+};
+
+interface GamepadButton {
+    readonly pressed: boolean;
+    readonly value: number;
+}
+
+declare var GamepadButton: {
+    prototype: GamepadButton;
+    new(): GamepadButton;
+};
+
+interface GamepadEvent extends Event {
+    readonly gamepad: Gamepad;
+}
+
+declare var GamepadEvent: {
+    prototype: GamepadEvent;
+    new(typeArg: string, eventInitDict?: GamepadEventInit): GamepadEvent;
+};
+
+interface Geolocation {
+    clearWatch(watchId: number): void;
+    getCurrentPosition(successCallback: PositionCallback, errorCallback?: PositionErrorCallback, options?: PositionOptions): void;
+    watchPosition(successCallback: PositionCallback, errorCallback?: PositionErrorCallback, options?: PositionOptions): number;
+}
+
+declare var Geolocation: {
+    prototype: Geolocation;
+    new(): Geolocation;
+};
+
+interface HashChangeEvent extends Event {
+    readonly newURL: string | null;
+    readonly oldURL: string | null;
+}
+
+declare var HashChangeEvent: {
+    prototype: HashChangeEvent;
+    new(typeArg: string, eventInitDict?: HashChangeEventInit): HashChangeEvent;
+};
+
+interface Headers {
+    append(name: string, value: string): void;
+    delete(name: string): void;
+    forEach(callback: ForEachCallback): void;
+    get(name: string): string | null;
+    has(name: string): boolean;
+    set(name: string, value: string): void;
+}
+
+declare var Headers: {
+    prototype: Headers;
+    new(init?: any): Headers;
+};
+
+interface History {
+    readonly length: number;
+    readonly state: any;
+    scrollRestoration: ScrollRestoration;
+    back(): void;
+    forward(): void;
+    go(delta?: number): void;
+    pushState(data: any, title: string, url?: string | null): void;
+    replaceState(data: any, title: string, url?: string | null): void;
+}
+
+declare var History: {
+    prototype: History;
+    new(): History;
+};
+
+interface HTMLAllCollection {
+    readonly length: number;
+    item(nameOrIndex?: string): HTMLCollection | Element | null;
+    namedItem(name: string): HTMLCollection | Element | null;
+    [index: number]: Element;
+}
+
+declare var HTMLAllCollection: {
+    prototype: HTMLAllCollection;
+    new(): HTMLAllCollection;
+};
+
+interface HTMLAnchorElement extends HTMLElement {
+    /**
+     * Sets or retrieves the character set used to encode the object.
+     */
+    charset: string;
+    /**
+     * Sets or retrieves the coordinates of the object.
+     */
+    coords: string;
+    download: string;
+    /**
+     * Contains the anchor portion of the URL including the hash sign (#).
+     */
+    hash: string;
+    /**
+     * Contains the hostname and port values of the URL.
+     */
+    host: string;
+    /**
+     * Contains the hostname of a URL.
+     */
+    hostname: string;
+    /**
+     * Sets or retrieves a destination URL or an anchor point.
+     */
+    href: string;
+    /**
+     * Sets or retrieves the language code of the object.
+     */
+    hreflang: string;
+    Methods: string;
+    readonly mimeType: string;
+    /**
+     * Sets or retrieves the shape of the object.
+     */
+    name: string;
+    readonly nameProp: string;
+    /**
+     * Contains the pathname of the URL.
+     */
+    pathname: string;
+    /**
+     * Sets or retrieves the port number associated with a URL.
+     */
+    port: string;
+    /**
+     * Contains the protocol of the URL.
+     */
+    protocol: string;
+    readonly protocolLong: string;
+    /**
+     * Sets or retrieves the relationship between the object and the destination of the link.
+     */
+    rel: string;
+    /**
+     * Sets or retrieves the relationship between the object and the destination of the link.
+     */
+    rev: string;
+    /**
+     * Sets or retrieves the substring of the href property that follows the question mark.
+     */
+    search: string;
+    /**
+     * Sets or retrieves the shape of the object.
+     */
+    shape: string;
+    /**
+     * Sets or retrieves the window or frame at which to target content.
+     */
+    target: string;
+    /**
+     * Retrieves or sets the text of the object as a string.
+     */
+    text: string;
+    type: string;
+    urn: string;
+    /**
+     * Returns a string representation of an object.
+     */
+    toString(): string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLAnchorElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLAnchorElement: {
+    prototype: HTMLAnchorElement;
+    new(): HTMLAnchorElement;
+};
+
+interface HTMLAppletElement extends HTMLElement {
+    align: string;
+    /**
+     * Sets or retrieves a text alternative to the graphic.
+     */
+    alt: string;
+    /**
+     * Gets or sets the optional alternative HTML script to execute if the object fails to load.
+     */
+    altHtml: string;
+    /**
+     * Sets or retrieves a character string that can be used to implement your own archive functionality for the object.
+     */
+    archive: string;
+    /**
+     * Retrieves a string of the URL where the object tag can be found. This is often the href of the document that the object is in, or the value set by a base element.
+     */
+    readonly BaseHref: string;
+    border: string;
+    code: string;
+    /**
+     * Sets or retrieves the URL of the component.
+     */
+    codeBase: string;
+    /**
+     * Sets or retrieves the Internet media type for the code associated with the object.
+     */
+    codeType: string;
+    /**
+     * Address of a pointer to the document this page or frame contains. If there is no document, then null will be returned.
+     */
+    readonly contentDocument: Document;
+    /**
+     * Sets or retrieves the URL that references the data of the object.
+     */
+    data: string;
+    /**
+     * Sets or retrieves a character string that can be used to implement your own declare functionality for the object.
+     */
+    declare: boolean;
+    readonly form: HTMLFormElement;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: string;
+    hspace: number;
+    /**
+     * Sets or retrieves the shape of the object.
+     */
+    name: string;
+    object: string | null;
+    /**
+     * Sets or retrieves a message to be displayed while an object is loading.
+     */
+    standby: string;
+    /**
+     * Returns the content type of the object.
+     */
+    type: string;
+    /**
+     * Sets or retrieves the URL, often with a bookmark extension (#name), to use as a client-side image map.
+     */
+    useMap: string;
+    vspace: number;
+    width: number;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLAppletElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLAppletElement: {
+    prototype: HTMLAppletElement;
+    new(): HTMLAppletElement;
+};
+
+interface HTMLAreaElement extends HTMLElement {
+    /**
+     * Sets or retrieves a text alternative to the graphic.
+     */
+    alt: string;
+    /**
+     * Sets or retrieves the coordinates of the object.
+     */
+    coords: string;
+    download: string;
+    /**
+     * Sets or retrieves the subsection of the href property that follows the number sign (#).
+     */
+    hash: string;
+    /**
+     * Sets or retrieves the hostname and port number of the location or URL.
+     */
+    host: string;
+    /**
+     * Sets or retrieves the host name part of the location or URL.
+     */
+    hostname: string;
+    /**
+     * Sets or retrieves a destination URL or an anchor point.
+     */
+    href: string;
+    /**
+     * Sets or gets whether clicks in this region cause action.
+     */
+    noHref: boolean;
+    /**
+     * Sets or retrieves the file name or path specified by the object.
+     */
+    pathname: string;
+    /**
+     * Sets or retrieves the port number associated with a URL.
+     */
+    port: string;
+    /**
+     * Sets or retrieves the protocol portion of a URL.
+     */
+    protocol: string;
+    rel: string;
+    /**
+     * Sets or retrieves the substring of the href property that follows the question mark.
+     */
+    search: string;
+    /**
+     * Sets or retrieves the shape of the object.
+     */
+    shape: string;
+    /**
+     * Sets or retrieves the window or frame at which to target content.
+     */
+    target: string;
+    /**
+     * Returns a string representation of an object.
+     */
+    toString(): string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLAreaElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLAreaElement: {
+    prototype: HTMLAreaElement;
+    new(): HTMLAreaElement;
+};
+
+interface HTMLAreasCollection extends HTMLCollectionBase {
+}
+
+declare var HTMLAreasCollection: {
+    prototype: HTMLAreasCollection;
+    new(): HTMLAreasCollection;
+};
+
+interface HTMLAudioElement extends HTMLMediaElement {
+    addEventListener<K extends keyof HTMLMediaElementEventMap>(type: K, listener: (this: HTMLAudioElement, ev: HTMLMediaElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLAudioElement: {
+    prototype: HTMLAudioElement;
+    new(): HTMLAudioElement;
+};
+
+interface HTMLBaseElement extends HTMLElement {
+    /**
+     * Gets or sets the baseline URL on which relative links are based.
+     */
+    href: string;
+    /**
+     * Sets or retrieves the window or frame at which to target content.
+     */
+    target: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLBaseElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLBaseElement: {
+    prototype: HTMLBaseElement;
+    new(): HTMLBaseElement;
+};
+
+interface HTMLBaseFontElement extends HTMLElement, DOML2DeprecatedColorProperty {
+    /**
+     * Sets or retrieves the current typeface family.
+     */
+    face: string;
+    /**
+     * Sets or retrieves the font size of the object.
+     */
+    size: number;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLBaseFontElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLBaseFontElement: {
+    prototype: HTMLBaseFontElement;
+    new(): HTMLBaseFontElement;
+};
+
+interface HTMLBodyElementEventMap extends HTMLElementEventMap {
+    "afterprint": Event;
+    "beforeprint": Event;
+    "beforeunload": BeforeUnloadEvent;
+    "blur": FocusEvent;
+    "error": ErrorEvent;
+    "focus": FocusEvent;
+    "hashchange": HashChangeEvent;
+    "load": Event;
+    "message": MessageEvent;
+    "offline": Event;
+    "online": Event;
+    "orientationchange": Event;
+    "pagehide": PageTransitionEvent;
+    "pageshow": PageTransitionEvent;
+    "popstate": PopStateEvent;
+    "resize": UIEvent;
+    "scroll": UIEvent;
+    "storage": StorageEvent;
+    "unload": Event;
+}
+
+interface HTMLBodyElement extends HTMLElement {
+    aLink: any;
+    background: string;
+    bgColor: any;
+    bgProperties: string;
+    link: any;
+    noWrap: boolean;
+    onafterprint: (this: HTMLBodyElement, ev: Event) => any;
+    onbeforeprint: (this: HTMLBodyElement, ev: Event) => any;
+    onbeforeunload: (this: HTMLBodyElement, ev: BeforeUnloadEvent) => any;
+    onblur: (this: HTMLBodyElement, ev: FocusEvent) => any;
+    onerror: (this: HTMLBodyElement, ev: ErrorEvent) => any;
+    onfocus: (this: HTMLBodyElement, ev: FocusEvent) => any;
+    onhashchange: (this: HTMLBodyElement, ev: HashChangeEvent) => any;
+    onload: (this: HTMLBodyElement, ev: Event) => any;
+    onmessage: (this: HTMLBodyElement, ev: MessageEvent) => any;
+    onoffline: (this: HTMLBodyElement, ev: Event) => any;
+    ononline: (this: HTMLBodyElement, ev: Event) => any;
+    onorientationchange: (this: HTMLBodyElement, ev: Event) => any;
+    onpagehide: (this: HTMLBodyElement, ev: PageTransitionEvent) => any;
+    onpageshow: (this: HTMLBodyElement, ev: PageTransitionEvent) => any;
+    onpopstate: (this: HTMLBodyElement, ev: PopStateEvent) => any;
+    onresize: (this: HTMLBodyElement, ev: UIEvent) => any;
+    onscroll: (this: HTMLBodyElement, ev: UIEvent) => any;
+    onstorage: (this: HTMLBodyElement, ev: StorageEvent) => any;
+    onunload: (this: HTMLBodyElement, ev: Event) => any;
+    text: any;
+    vLink: any;
+    addEventListener<K extends keyof HTMLBodyElementEventMap>(type: K, listener: (this: HTMLBodyElement, ev: HTMLBodyElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLBodyElement: {
+    prototype: HTMLBodyElement;
+    new(): HTMLBodyElement;
+};
+
+interface HTMLBRElement extends HTMLElement {
+    /**
+     * Sets or retrieves the side on which floating objects are not to be positioned when any IHTMLBlockElement is inserted into the document.
+     */
+    clear: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLBRElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLBRElement: {
+    prototype: HTMLBRElement;
+    new(): HTMLBRElement;
+};
+
+interface HTMLButtonElement extends HTMLElement {
+    /**
+     * Provides a way to direct a user to a specific field when a document loads. This can provide both direction and convenience for a user, reducing the need to click or tab to a field when a page opens. This attribute is true when present on an element, and false when missing.
+     */
+    autofocus: boolean;
+    disabled: boolean;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Overrides the action attribute (where the data on a form is sent) on the parent form element.
+     */
+    formAction: string;
+    /**
+     * Used to override the encoding (formEnctype attribute) specified on the form element.
+     */
+    formEnctype: string;
+    /**
+     * Overrides the submit method attribute previously specified on a form element.
+     */
+    formMethod: string;
+    /**
+     * Overrides any validation or required attributes on a form or form elements to allow it to be submitted without validation. This can be used to create a "save draft"-type submit option.
+     */
+    formNoValidate: string;
+    /**
+     * Overrides the target attribute on a form element.
+     */
+    formTarget: string;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    status: any;
+    /**
+     * Gets the classification and default behavior of the button.
+     */
+    type: string;
+    /**
+     * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
+     */
+    readonly validationMessage: string;
+    /**
+     * Returns a  ValidityState object that represents the validity states of an element.
+     */
+    readonly validity: ValidityState;
+    /**
+     * Sets or retrieves the default or selected value of the control.
+     */
+    value: string;
+    /**
+     * Returns whether an element will successfully validate based on forms validation rules and constraints.
+     */
+    readonly willValidate: boolean;
+    /**
+     * Returns whether a form will validate when it is submitted, without having to submit it.
+     */
+    checkValidity(): boolean;
+    /**
+     * Sets a custom error message that is displayed when a form is submitted.
+     * @param error Sets a custom error message that is displayed when a form is submitted.
+     */
+    setCustomValidity(error: string): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLButtonElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLButtonElement: {
+    prototype: HTMLButtonElement;
+    new(): HTMLButtonElement;
+};
+
+interface HTMLCanvasElement extends HTMLElement {
+    /**
+     * Gets or sets the height of a canvas element on a document.
+     */
+    height: number;
+    /**
+     * Gets or sets the width of a canvas element on a document.
+     */
+    width: number;
+    /**
+     * Returns an object that provides methods and properties for drawing and manipulating images and graphics on a canvas element in a document. A context object includes information about colors, line widths, fonts, and other graphic parameters that can be drawn on a canvas.
+     * @param contextId The identifier (ID) of the type of canvas to create. Internet Explorer 9 and Internet Explorer 10 support only a 2-D context using canvas.getContext("2d"); IE11 Preview also supports 3-D or WebGL context using canvas.getContext("experimental-webgl");
+     */
+    getContext(contextId: "2d", contextAttributes?: Canvas2DContextAttributes): CanvasRenderingContext2D | null;
+    getContext(contextId: "webgl" | "experimental-webgl", contextAttributes?: WebGLContextAttributes): WebGLRenderingContext | null;
+    getContext(contextId: string, contextAttributes?: {}): CanvasRenderingContext2D | WebGLRenderingContext | null;
+    /**
+     * Returns a blob object encoded as a Portable Network Graphics (PNG) format from a canvas image or drawing.
+     */
+    msToBlob(): Blob;
+    /**
+     * Returns the content of the current canvas as an image that you can use as a source for another canvas or an HTML element.
+     * @param type The standard MIME type for the image format to return. If you do not specify this parameter, the default value is a PNG format image.
+     */
+    toDataURL(type?: string, ...args: any[]): string;
+    toBlob(callback: (result: Blob | null) => void, type?: string, ...arguments: any[]): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLCanvasElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLCanvasElement: {
+    prototype: HTMLCanvasElement;
+    new(): HTMLCanvasElement;
+};
+
+interface HTMLCollectionBase {
+    /**
+     * Sets or retrieves the number of objects in a collection.
+     */
+    readonly length: number;
+    /**
+     * Retrieves an object from various collections.
+     */
+    item(index: number): Element;
+    [index: number]: Element;
+}
+
+interface HTMLCollection extends HTMLCollectionBase {
+    /**
+     * Retrieves a select object or an object from an options collection.
+     */
+    namedItem(name: string): Element | null;
+}
+
+declare var HTMLCollection: {
+    prototype: HTMLCollection;
+    new(): HTMLCollection;
+};
+
+interface HTMLDataElement extends HTMLElement {
+    value: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLDataElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLDataElement: {
+    prototype: HTMLDataElement;
+    new(): HTMLDataElement;
+};
+
+interface HTMLDataListElement extends HTMLElement {
+    options: HTMLCollectionOf<HTMLOptionElement>;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLDataListElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLDataListElement: {
+    prototype: HTMLDataListElement;
+    new(): HTMLDataListElement;
+};
+
+interface HTMLDirectoryElement extends HTMLElement {
+    compact: boolean;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLDirectoryElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLDirectoryElement: {
+    prototype: HTMLDirectoryElement;
+    new(): HTMLDirectoryElement;
+};
+
+interface HTMLDivElement extends HTMLElement {
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    /**
+     * Sets or retrieves whether the browser automatically performs wordwrap.
+     */
+    noWrap: boolean;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLDivElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLDivElement: {
+    prototype: HTMLDivElement;
+    new(): HTMLDivElement;
+};
+
+interface HTMLDListElement extends HTMLElement {
+    compact: boolean;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLDListElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLDListElement: {
+    prototype: HTMLDListElement;
+    new(): HTMLDListElement;
+};
+
+interface HTMLDocument extends Document {
+    addEventListener<K extends keyof DocumentEventMap>(type: K, listener: (this: HTMLDocument, ev: DocumentEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLDocument: {
+    prototype: HTMLDocument;
+    new(): HTMLDocument;
+};
+
+interface HTMLElementEventMap extends ElementEventMap {
+    "abort": UIEvent;
+    "activate": UIEvent;
+    "beforeactivate": UIEvent;
+    "beforecopy": ClipboardEvent;
+    "beforecut": ClipboardEvent;
+    "beforedeactivate": UIEvent;
+    "beforepaste": ClipboardEvent;
+    "blur": FocusEvent;
+    "canplay": Event;
+    "canplaythrough": Event;
+    "change": Event;
+    "click": MouseEvent;
+    "contextmenu": PointerEvent;
+    "copy": ClipboardEvent;
+    "cuechange": Event;
+    "cut": ClipboardEvent;
+    "dblclick": MouseEvent;
+    "deactivate": UIEvent;
+    "drag": DragEvent;
+    "dragend": DragEvent;
+    "dragenter": DragEvent;
+    "dragleave": DragEvent;
+    "dragover": DragEvent;
+    "dragstart": DragEvent;
+    "drop": DragEvent;
+    "durationchange": Event;
+    "emptied": Event;
+    "ended": MediaStreamErrorEvent;
+    "error": ErrorEvent;
+    "focus": FocusEvent;
+    "input": Event;
+    "invalid": Event;
+    "keydown": KeyboardEvent;
+    "keypress": KeyboardEvent;
+    "keyup": KeyboardEvent;
+    "load": Event;
+    "loadeddata": Event;
+    "loadedmetadata": Event;
+    "loadstart": Event;
+    "mousedown": MouseEvent;
+    "mouseenter": MouseEvent;
+    "mouseleave": MouseEvent;
+    "mousemove": MouseEvent;
+    "mouseout": MouseEvent;
+    "mouseover": MouseEvent;
+    "mouseup": MouseEvent;
+    "mousewheel": WheelEvent;
+    "MSContentZoom": UIEvent;
+    "MSManipulationStateChanged": MSManipulationEvent;
+    "paste": ClipboardEvent;
+    "pause": Event;
+    "play": Event;
+    "playing": Event;
+    "progress": ProgressEvent;
+    "ratechange": Event;
+    "reset": Event;
+    "scroll": UIEvent;
+    "seeked": Event;
+    "seeking": Event;
+    "select": UIEvent;
+    "selectstart": Event;
+    "stalled": Event;
+    "submit": Event;
+    "suspend": Event;
+    "timeupdate": Event;
+    "volumechange": Event;
+    "waiting": Event;
+}
+
+interface HTMLElement extends Element {
+    accessKey: string;
+    readonly children: HTMLCollection;
+    contentEditable: string;
+    readonly dataset: DOMStringMap;
+    dir: string;
+    draggable: boolean;
+    hidden: boolean;
+    hideFocus: boolean;
+    innerText: string;
+    readonly isContentEditable: boolean;
+    lang: string;
+    readonly offsetHeight: number;
+    readonly offsetLeft: number;
+    readonly offsetParent: Element;
+    readonly offsetTop: number;
+    readonly offsetWidth: number;
+    onabort: (this: HTMLElement, ev: UIEvent) => any;
+    onactivate: (this: HTMLElement, ev: UIEvent) => any;
+    onbeforeactivate: (this: HTMLElement, ev: UIEvent) => any;
+    onbeforecopy: (this: HTMLElement, ev: ClipboardEvent) => any;
+    onbeforecut: (this: HTMLElement, ev: ClipboardEvent) => any;
+    onbeforedeactivate: (this: HTMLElement, ev: UIEvent) => any;
+    onbeforepaste: (this: HTMLElement, ev: ClipboardEvent) => any;
+    onblur: (this: HTMLElement, ev: FocusEvent) => any;
+    oncanplay: (this: HTMLElement, ev: Event) => any;
+    oncanplaythrough: (this: HTMLElement, ev: Event) => any;
+    onchange: (this: HTMLElement, ev: Event) => any;
+    onclick: (this: HTMLElement, ev: MouseEvent) => any;
+    oncontextmenu: (this: HTMLElement, ev: PointerEvent) => any;
+    oncopy: (this: HTMLElement, ev: ClipboardEvent) => any;
+    oncuechange: (this: HTMLElement, ev: Event) => any;
+    oncut: (this: HTMLElement, ev: ClipboardEvent) => any;
+    ondblclick: (this: HTMLElement, ev: MouseEvent) => any;
+    ondeactivate: (this: HTMLElement, ev: UIEvent) => any;
+    ondrag: (this: HTMLElement, ev: DragEvent) => any;
+    ondragend: (this: HTMLElement, ev: DragEvent) => any;
+    ondragenter: (this: HTMLElement, ev: DragEvent) => any;
+    ondragleave: (this: HTMLElement, ev: DragEvent) => any;
+    ondragover: (this: HTMLElement, ev: DragEvent) => any;
+    ondragstart: (this: HTMLElement, ev: DragEvent) => any;
+    ondrop: (this: HTMLElement, ev: DragEvent) => any;
+    ondurationchange: (this: HTMLElement, ev: Event) => any;
+    onemptied: (this: HTMLElement, ev: Event) => any;
+    onended: (this: HTMLElement, ev: MediaStreamErrorEvent) => any;
+    onerror: (this: HTMLElement, ev: ErrorEvent) => any;
+    onfocus: (this: HTMLElement, ev: FocusEvent) => any;
+    oninput: (this: HTMLElement, ev: Event) => any;
+    oninvalid: (this: HTMLElement, ev: Event) => any;
+    onkeydown: (this: HTMLElement, ev: KeyboardEvent) => any;
+    onkeypress: (this: HTMLElement, ev: KeyboardEvent) => any;
+    onkeyup: (this: HTMLElement, ev: KeyboardEvent) => any;
+    onload: (this: HTMLElement, ev: Event) => any;
+    onloadeddata: (this: HTMLElement, ev: Event) => any;
+    onloadedmetadata: (this: HTMLElement, ev: Event) => any;
+    onloadstart: (this: HTMLElement, ev: Event) => any;
+    onmousedown: (this: HTMLElement, ev: MouseEvent) => any;
+    onmouseenter: (this: HTMLElement, ev: MouseEvent) => any;
+    onmouseleave: (this: HTMLElement, ev: MouseEvent) => any;
+    onmousemove: (this: HTMLElement, ev: MouseEvent) => any;
+    onmouseout: (this: HTMLElement, ev: MouseEvent) => any;
+    onmouseover: (this: HTMLElement, ev: MouseEvent) => any;
+    onmouseup: (this: HTMLElement, ev: MouseEvent) => any;
+    onmousewheel: (this: HTMLElement, ev: WheelEvent) => any;
+    onmscontentzoom: (this: HTMLElement, ev: UIEvent) => any;
+    onmsmanipulationstatechanged: (this: HTMLElement, ev: MSManipulationEvent) => any;
+    onpaste: (this: HTMLElement, ev: ClipboardEvent) => any;
+    onpause: (this: HTMLElement, ev: Event) => any;
+    onplay: (this: HTMLElement, ev: Event) => any;
+    onplaying: (this: HTMLElement, ev: Event) => any;
+    onprogress: (this: HTMLElement, ev: ProgressEvent) => any;
+    onratechange: (this: HTMLElement, ev: Event) => any;
+    onreset: (this: HTMLElement, ev: Event) => any;
+    onscroll: (this: HTMLElement, ev: UIEvent) => any;
+    onseeked: (this: HTMLElement, ev: Event) => any;
+    onseeking: (this: HTMLElement, ev: Event) => any;
+    onselect: (this: HTMLElement, ev: UIEvent) => any;
+    onselectstart: (this: HTMLElement, ev: Event) => any;
+    onstalled: (this: HTMLElement, ev: Event) => any;
+    onsubmit: (this: HTMLElement, ev: Event) => any;
+    onsuspend: (this: HTMLElement, ev: Event) => any;
+    ontimeupdate: (this: HTMLElement, ev: Event) => any;
+    onvolumechange: (this: HTMLElement, ev: Event) => any;
+    onwaiting: (this: HTMLElement, ev: Event) => any;
+    outerText: string;
+    spellcheck: boolean;
+    readonly style: CSSStyleDeclaration;
+    tabIndex: number;
+    title: string;
+    blur(): void;
+    click(): void;
+    dragDrop(): boolean;
+    focus(): void;
+    msGetInputContext(): MSInputMethodContext;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLElement: {
+    prototype: HTMLElement;
+    new(): HTMLElement;
+};
+
+interface HTMLEmbedElement extends HTMLElement, GetSVGDocument {
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: string;
+    hidden: any;
+    /**
+     * Gets or sets whether the DLNA PlayTo device is available.
+     */
+    msPlayToDisabled: boolean;
+    /**
+     * Gets or sets the path to the preferred media source. This enables the Play To target device to stream the media content, which can be DRM protected, from a different location, such as a cloud media server.
+     */
+    msPlayToPreferredSourceUri: string;
+    /**
+     * Gets or sets the primary DLNA PlayTo device.
+     */
+    msPlayToPrimary: boolean;
+    /**
+     * Gets the source associated with the media element for use by the PlayToManager.
+     */
+    readonly msPlayToSource: any;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    /**
+     * Retrieves the palette used for the embedded document.
+     */
+    readonly palette: string;
+    /**
+     * Retrieves the URL of the plug-in used to view an embedded document.
+     */
+    readonly pluginspage: string;
+    readonly readyState: string;
+    /**
+     * Sets or retrieves a URL to be loaded by the object.
+     */
+    src: string;
+    /**
+     * Sets or retrieves the height and width units of the embed object.
+     */
+    units: string;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLEmbedElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLEmbedElement: {
+    prototype: HTMLEmbedElement;
+    new(): HTMLEmbedElement;
+};
+
+interface HTMLFieldSetElement extends HTMLElement {
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    disabled: boolean;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    name: string;
+    /**
+     * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
+     */
+    readonly validationMessage: string;
+    /**
+     * Returns a  ValidityState object that represents the validity states of an element.
+     */
+    readonly validity: ValidityState;
+    /**
+     * Returns whether an element will successfully validate based on forms validation rules and constraints.
+     */
+    readonly willValidate: boolean;
+    /**
+     * Returns whether a form will validate when it is submitted, without having to submit it.
+     */
+    checkValidity(): boolean;
+    /**
+     * Sets a custom error message that is displayed when a form is submitted.
+     * @param error Sets a custom error message that is displayed when a form is submitted.
+     */
+    setCustomValidity(error: string): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLFieldSetElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLFieldSetElement: {
+    prototype: HTMLFieldSetElement;
+    new(): HTMLFieldSetElement;
+};
+
+interface HTMLFontElement extends HTMLElement, DOML2DeprecatedColorProperty, DOML2DeprecatedSizeProperty {
+    /**
+     * Sets or retrieves the current typeface family.
+     */
+    face: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLFontElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLFontElement: {
+    prototype: HTMLFontElement;
+    new(): HTMLFontElement;
+};
+
+interface HTMLFormControlsCollection extends HTMLCollectionBase {
+    namedItem(name: string): HTMLCollection | Element | null;
+}
+
+declare var HTMLFormControlsCollection: {
+    prototype: HTMLFormControlsCollection;
+    new(): HTMLFormControlsCollection;
+};
+
+interface HTMLFormElement extends HTMLElement {
+    /**
+     * Sets or retrieves a list of character encodings for input data that must be accepted by the server processing the form.
+     */
+    acceptCharset: string;
+    /**
+     * Sets or retrieves the URL to which the form content is sent for processing.
+     */
+    action: string;
+    /**
+     * Specifies whether autocomplete is applied to an editable text field.
+     */
+    autocomplete: string;
+    /**
+     * Retrieves a collection, in source order, of all controls in a given form.
+     */
+    readonly elements: HTMLFormControlsCollection;
+    /**
+     * Sets or retrieves the MIME encoding for the form.
+     */
+    encoding: string;
+    /**
+     * Sets or retrieves the encoding type for the form.
+     */
+    enctype: string;
+    /**
+     * Sets or retrieves the number of objects in a collection.
+     */
+    readonly length: number;
+    /**
+     * Sets or retrieves how to send the form data to the server.
+     */
+    method: string;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    /**
+     * Designates a form that is not validated when submitted.
+     */
+    noValidate: boolean;
+    /**
+     * Sets or retrieves the window or frame at which to target content.
+     */
+    target: string;
+    /**
+     * Returns whether a form will validate when it is submitted, without having to submit it.
+     */
+    checkValidity(): boolean;
+    /**
+     * Retrieves a form object or an object from an elements collection.
+     * @param name Variant of type Number or String that specifies the object or collection to retrieve. If this parameter is a Number, it is the zero-based index of the object. If this parameter is a string, all objects with matching name or id properties are retrieved, and a collection is returned if more than one match is made.
+     * @param index Variant of type Number that specifies the zero-based index of the object to retrieve when a collection is returned.
+     */
+    item(name?: any, index?: any): any;
+    /**
+     * Retrieves a form object or an object from an elements collection.
+     */
+    namedItem(name: string): any;
+    /**
+     * Fires when the user resets a form.
+     */
+    reset(): void;
+    /**
+     * Fires when a FORM is about to be submitted.
+     */
+    submit(): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLFormElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+    [name: string]: any;
+}
+
+declare var HTMLFormElement: {
+    prototype: HTMLFormElement;
+    new(): HTMLFormElement;
+};
+
+interface HTMLFrameElementEventMap extends HTMLElementEventMap {
+    "load": Event;
+}
+
+interface HTMLFrameElement extends HTMLElement, GetSVGDocument {
+    /**
+     * Specifies the properties of a border drawn around an object.
+     */
+    border: string;
+    /**
+     * Sets or retrieves the border color of the object.
+     */
+    borderColor: any;
+    /**
+     * Retrieves the document object of the page or frame.
+     */
+    readonly contentDocument: Document;
+    /**
+     * Retrieves the object of the specified.
+     */
+    readonly contentWindow: Window;
+    /**
+     * Sets or retrieves whether to display a border for the frame.
+     */
+    frameBorder: string;
+    /**
+     * Sets or retrieves the amount of additional space between the frames.
+     */
+    frameSpacing: any;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: string | number;
+    /**
+     * Sets or retrieves a URI to a long description of the object.
+     */
+    longDesc: string;
+    /**
+     * Sets or retrieves the top and bottom margin heights before displaying the text in a frame.
+     */
+    marginHeight: string;
+    /**
+     * Sets or retrieves the left and right margin widths before displaying the text in a frame.
+     */
+    marginWidth: string;
+    /**
+     * Sets or retrieves the frame name.
+     */
+    name: string;
+    /**
+     * Sets or retrieves whether the user can resize the frame.
+     */
+    noResize: boolean;
+    /**
+     * Raised when the object has been completely received from the server.
+     */
+    onload: (this: HTMLFrameElement, ev: Event) => any;
+    /**
+     * Sets or retrieves whether the frame can be scrolled.
+     */
+    scrolling: string;
+    /**
+     * Sets or retrieves a URL to be loaded by the object.
+     */
+    src: string;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: string | number;
+    addEventListener<K extends keyof HTMLFrameElementEventMap>(type: K, listener: (this: HTMLFrameElement, ev: HTMLFrameElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLFrameElement: {
+    prototype: HTMLFrameElement;
+    new(): HTMLFrameElement;
+};
+
+interface HTMLFrameSetElementEventMap extends HTMLElementEventMap {
+    "afterprint": Event;
+    "beforeprint": Event;
+    "beforeunload": BeforeUnloadEvent;
+    "blur": FocusEvent;
+    "error": ErrorEvent;
+    "focus": FocusEvent;
+    "hashchange": HashChangeEvent;
+    "load": Event;
+    "message": MessageEvent;
+    "offline": Event;
+    "online": Event;
+    "orientationchange": Event;
+    "pagehide": PageTransitionEvent;
+    "pageshow": PageTransitionEvent;
+    "popstate": PopStateEvent;
+    "resize": UIEvent;
+    "scroll": UIEvent;
+    "storage": StorageEvent;
+    "unload": Event;
+}
+
+interface HTMLFrameSetElement extends HTMLElement {
+    border: string;
+    /**
+     * Sets or retrieves the border color of the object.
+     */
+    borderColor: any;
+    /**
+     * Sets or retrieves the frame widths of the object.
+     */
+    cols: string;
+    /**
+     * Sets or retrieves whether to display a border for the frame.
+     */
+    frameBorder: string;
+    /**
+     * Sets or retrieves the amount of additional space between the frames.
+     */
+    frameSpacing: any;
+    name: string;
+    onafterprint: (this: HTMLFrameSetElement, ev: Event) => any;
+    onbeforeprint: (this: HTMLFrameSetElement, ev: Event) => any;
+    onbeforeunload: (this: HTMLFrameSetElement, ev: BeforeUnloadEvent) => any;
+    /**
+     * Fires when the object loses the input focus.
+     */
+    onblur: (this: HTMLFrameSetElement, ev: FocusEvent) => any;
+    onerror: (this: HTMLFrameSetElement, ev: ErrorEvent) => any;
+    /**
+     * Fires when the object receives focus.
+     */
+    onfocus: (this: HTMLFrameSetElement, ev: FocusEvent) => any;
+    onhashchange: (this: HTMLFrameSetElement, ev: HashChangeEvent) => any;
+    onload: (this: HTMLFrameSetElement, ev: Event) => any;
+    onmessage: (this: HTMLFrameSetElement, ev: MessageEvent) => any;
+    onoffline: (this: HTMLFrameSetElement, ev: Event) => any;
+    ononline: (this: HTMLFrameSetElement, ev: Event) => any;
+    onorientationchange: (this: HTMLFrameSetElement, ev: Event) => any;
+    onpagehide: (this: HTMLFrameSetElement, ev: PageTransitionEvent) => any;
+    onpageshow: (this: HTMLFrameSetElement, ev: PageTransitionEvent) => any;
+    onpopstate: (this: HTMLFrameSetElement, ev: PopStateEvent) => any;
+    onresize: (this: HTMLFrameSetElement, ev: UIEvent) => any;
+    onscroll: (this: HTMLFrameSetElement, ev: UIEvent) => any;
+    onstorage: (this: HTMLFrameSetElement, ev: StorageEvent) => any;
+    onunload: (this: HTMLFrameSetElement, ev: Event) => any;
+    /**
+     * Sets or retrieves the frame heights of the object.
+     */
+    rows: string;
+    addEventListener<K extends keyof HTMLFrameSetElementEventMap>(type: K, listener: (this: HTMLFrameSetElement, ev: HTMLFrameSetElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLFrameSetElement: {
+    prototype: HTMLFrameSetElement;
+    new(): HTMLFrameSetElement;
+};
+
+interface HTMLHeadElement extends HTMLElement {
+    profile: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLHeadElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLHeadElement: {
+    prototype: HTMLHeadElement;
+    new(): HTMLHeadElement;
+};
+
+interface HTMLHeadingElement extends HTMLElement {
+    /**
+     * Sets or retrieves a value that indicates the table alignment.
+     */
+    align: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLHeadingElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLHeadingElement: {
+    prototype: HTMLHeadingElement;
+    new(): HTMLHeadingElement;
+};
+
+interface HTMLHRElement extends HTMLElement, DOML2DeprecatedColorProperty, DOML2DeprecatedSizeProperty {
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    /**
+     * Sets or retrieves whether the horizontal rule is drawn with 3-D shading.
+     */
+    noShade: boolean;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: number;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLHRElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLHRElement: {
+    prototype: HTMLHRElement;
+    new(): HTMLHRElement;
+};
+
+interface HTMLHtmlElement extends HTMLElement {
+    /**
+     * Sets or retrieves the DTD version that governs the current document.
+     */
+    version: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLHtmlElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLHtmlElement: {
+    prototype: HTMLHtmlElement;
+    new(): HTMLHtmlElement;
+};
+
+interface HTMLIFrameElementEventMap extends HTMLElementEventMap {
+    "load": Event;
+}
+
+interface HTMLIFrameElement extends HTMLElement, GetSVGDocument {
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    allowFullscreen: boolean;
+    allowPaymentRequest: boolean;
+    /**
+     * Specifies the properties of a border drawn around an object.
+     */
+    border: string;
+    /**
+     * Retrieves the document object of the page or frame.
+     */
+    readonly contentDocument: Document;
+    /**
+     * Retrieves the object of the specified.
+     */
+    readonly contentWindow: Window;
+    /**
+     * Sets or retrieves whether to display a border for the frame.
+     */
+    frameBorder: string;
+    /**
+     * Sets or retrieves the amount of additional space between the frames.
+     */
+    frameSpacing: any;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: string;
+    /**
+     * Sets or retrieves the horizontal margin for the object.
+     */
+    hspace: number;
+    /**
+     * Sets or retrieves a URI to a long description of the object.
+     */
+    longDesc: string;
+    /**
+     * Sets or retrieves the top and bottom margin heights before displaying the text in a frame.
+     */
+    marginHeight: string;
+    /**
+     * Sets or retrieves the left and right margin widths before displaying the text in a frame.
+     */
+    marginWidth: string;
+    /**
+     * Sets or retrieves the frame name.
+     */
+    name: string;
+    /**
+     * Sets or retrieves whether the user can resize the frame.
+     */
+    noResize: boolean;
+    /**
+     * Raised when the object has been completely received from the server.
+     */
+    onload: (this: HTMLIFrameElement, ev: Event) => any;
+    readonly sandbox: DOMSettableTokenList;
+    /**
+     * Sets or retrieves whether the frame can be scrolled.
+     */
+    scrolling: string;
+    /**
+     * Sets or retrieves a URL to be loaded by the object.
+     */
+    src: string;
+    /**
+     * Sets or retrieves the vertical margin for the object.
+     */
+    vspace: number;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: string;
+    addEventListener<K extends keyof HTMLIFrameElementEventMap>(type: K, listener: (this: HTMLIFrameElement, ev: HTMLIFrameElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLIFrameElement: {
+    prototype: HTMLIFrameElement;
+    new(): HTMLIFrameElement;
+};
+
+interface HTMLImageElement extends HTMLElement {
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    /**
+     * Sets or retrieves a text alternative to the graphic.
+     */
+    alt: string;
+    /**
+     * Specifies the properties of a border drawn around an object.
+     */
+    border: string;
+    /**
+     * Retrieves whether the object is fully loaded.
+     */
+    readonly complete: boolean;
+    crossOrigin: string | null;
+    readonly currentSrc: string;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: number;
+    /**
+     * Sets or retrieves the width of the border to draw around the object.
+     */
+    hspace: number;
+    /**
+     * Sets or retrieves whether the image is a server-side image map.
+     */
+    isMap: boolean;
+    /**
+     * Sets or retrieves a Uniform Resource Identifier (URI) to a long description of the object.
+     */
+    longDesc: string;
+    lowsrc: string;
+    /**
+     * Gets or sets whether the DLNA PlayTo device is available.
+     */
+    msPlayToDisabled: boolean;
+    msPlayToPreferredSourceUri: string;
+    /**
+     * Gets or sets the primary DLNA PlayTo device.
+     */
+    msPlayToPrimary: boolean;
+    /**
+     * Gets the source associated with the media element for use by the PlayToManager.
+     */
+    readonly msPlayToSource: any;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    /**
+     * The original height of the image resource before sizing.
+     */
+    readonly naturalHeight: number;
+    /**
+     * The original width of the image resource before sizing.
+     */
+    readonly naturalWidth: number;
+    sizes: string;
+    /**
+     * The address or URL of the a media resource that is to be considered.
+     */
+    src: string;
+    srcset: string;
+    /**
+     * Sets or retrieves the URL, often with a bookmark extension (#name), to use as a client-side image map.
+     */
+    useMap: string;
+    /**
+     * Sets or retrieves the vertical margin for the object.
+     */
+    vspace: number;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: number;
+    readonly x: number;
+    readonly y: number;
+    msGetAsCastingSource(): any;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLImageElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLImageElement: {
+    prototype: HTMLImageElement;
+    new(): HTMLImageElement;
+};
+
+interface HTMLInputElement extends HTMLElement {
+    /**
+     * Sets or retrieves a comma-separated list of content types.
+     */
+    accept: string;
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    /**
+     * Sets or retrieves a text alternative to the graphic.
+     */
+    alt: string;
+    /**
+     * Specifies whether autocomplete is applied to an editable text field.
+     */
+    autocomplete: string;
+    /**
+     * Provides a way to direct a user to a specific field when a document loads. This can provide both direction and convenience for a user, reducing the need to click or tab to a field when a page opens. This attribute is true when present on an element, and false when missing.
+     */
+    autofocus: boolean;
+    /**
+     * Sets or retrieves the width of the border to draw around the object.
+     */
+    border: string;
+    /**
+     * Sets or retrieves the state of the check box or radio button.
+     */
+    checked: boolean;
+    /**
+     * Retrieves whether the object is fully loaded.
+     */
+    readonly complete: boolean;
+    /**
+     * Sets or retrieves the state of the check box or radio button.
+     */
+    defaultChecked: boolean;
+    /**
+     * Sets or retrieves the initial contents of the object.
+     */
+    defaultValue: string;
+    disabled: boolean;
+    /**
+     * Returns a FileList object on a file type input object.
+     */
+    readonly files: FileList | null;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Overrides the action attribute (where the data on a form is sent) on the parent form element.
+     */
+    formAction: string;
+    /**
+     * Used to override the encoding (formEnctype attribute) specified on the form element.
+     */
+    formEnctype: string;
+    /**
+     * Overrides the submit method attribute previously specified on a form element.
+     */
+    formMethod: string;
+    /**
+     * Overrides any validation or required attributes on a form or form elements to allow it to be submitted without validation. This can be used to create a "save draft"-type submit option.
+     */
+    formNoValidate: string;
+    /**
+     * Overrides the target attribute on a form element.
+     */
+    formTarget: string;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: string;
+    /**
+     * Sets or retrieves the width of the border to draw around the object.
+     */
+    hspace: number;
+    indeterminate: boolean;
+    /**
+     * Specifies the ID of a pre-defined datalist of options for an input element.
+     */
+    readonly list: HTMLElement;
+    /**
+     * Defines the maximum acceptable value for an input element with type="number".When used with the min and step attributes, lets you control the range and increment (such as only even numbers) that the user can enter into an input field.
+     */
+    max: string;
+    /**
+     * Sets or retrieves the maximum number of characters that the user can enter in a text control.
+     */
+    maxLength: number;
+    /**
+     * Defines the minimum acceptable value for an input element with type="number". When used with the max and step attributes, lets you control the range and increment (such as even numbers only) that the user can enter into an input field.
+     */
+    min: string;
+    /**
+     * Sets or retrieves the Boolean value indicating whether multiple items can be selected from a list.
+     */
+    multiple: boolean;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    /**
+     * Gets or sets a string containing a regular expression that the user's input must match.
+     */
+    pattern: string;
+    /**
+     * Gets or sets a text string that is displayed in an input field as a hint or prompt to users as the format or type of information they need to enter.The text appears in an input field until the user puts focus on the field.
+     */
+    placeholder: string;
+    readOnly: boolean;
+    /**
+     * When present, marks an element that can't be submitted without a value.
+     */
+    required: boolean;
+    selectionDirection: string;
+    /**
+     * Gets or sets the end position or offset of a text selection.
+     */
+    selectionEnd: number;
+    /**
+     * Gets or sets the starting position or offset of a text selection.
+     */
+    selectionStart: number;
+    size: number;
+    /**
+     * The address or URL of the a media resource that is to be considered.
+     */
+    src: string;
+    status: boolean;
+    /**
+     * Defines an increment or jump between values that you want to allow the user to enter. When used with the max and min attributes, lets you control the range and increment (for example, allow only even numbers) that the user can enter into an input field.
+     */
+    step: string;
+    /**
+     * Returns the content type of the object.
+     */
+    type: string;
+    /**
+     * Sets or retrieves the URL, often with a bookmark extension (#name), to use as a client-side image map.
+     */
+    useMap: string;
+    /**
+     * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
+     */
+    readonly validationMessage: string;
+    /**
+     * Returns a  ValidityState object that represents the validity states of an element.
+     */
+    readonly validity: ValidityState;
+    /**
+     * Returns the value of the data at the cursor's current position.
+     */
+    value: string;
+    valueAsDate: Date;
+    /**
+     * Returns the input field value as a number.
+     */
+    valueAsNumber: number;
+    /**
+     * Sets or retrieves the vertical margin for the object.
+     */
+    vspace: number;
+    webkitdirectory: boolean;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: string;
+    /**
+     * Returns whether an element will successfully validate based on forms validation rules and constraints.
+     */
+    readonly willValidate: boolean;
+    minLength: number;
+    /**
+     * Returns whether a form will validate when it is submitted, without having to submit it.
+     */
+    checkValidity(): boolean;
+    /**
+     * Makes the selection equal to the current object.
+     */
+    select(): void;
+    /**
+     * Sets a custom error message that is displayed when a form is submitted.
+     * @param error Sets a custom error message that is displayed when a form is submitted.
+     */
+    setCustomValidity(error: string): void;
+    /**
+     * Sets the start and end positions of a selection in a text field.
+     * @param start The offset into the text field for the start of the selection.
+     * @param end The offset into the text field for the end of the selection.
+     */
+    setSelectionRange(start?: number, end?: number, direction?: string): void;
+    /**
+     * Decrements a range input control's value by the value given by the Step attribute. If the optional parameter is used, it will decrement the input control's step value multiplied by the parameter's value.
+     * @param n Value to decrement the value by.
+     */
+    stepDown(n?: number): void;
+    /**
+     * Increments a range input control's value by the value given by the Step attribute. If the optional parameter is used, will increment the input control's value by that value.
+     * @param n Value to increment the value by.
+     */
+    stepUp(n?: number): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLInputElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLInputElement: {
+    prototype: HTMLInputElement;
+    new(): HTMLInputElement;
+};
+
+interface HTMLLabelElement extends HTMLElement {
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Sets or retrieves the object to which the given label object is assigned.
+     */
+    htmlFor: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLLabelElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLLabelElement: {
+    prototype: HTMLLabelElement;
+    new(): HTMLLabelElement;
+};
+
+interface HTMLLegendElement extends HTMLElement {
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    align: string;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLLegendElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLLegendElement: {
+    prototype: HTMLLegendElement;
+    new(): HTMLLegendElement;
+};
+
+interface HTMLLIElement extends HTMLElement {
+    type: string;
+    /**
+     * Sets or retrieves the value of a list item.
+     */
+    value: number;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLLIElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLLIElement: {
+    prototype: HTMLLIElement;
+    new(): HTMLLIElement;
+};
+
+interface HTMLLinkElement extends HTMLElement, LinkStyle {
+    /**
+     * Sets or retrieves the character set used to encode the object.
+     */
+    charset: string;
+    disabled: boolean;
+    /**
+     * Sets or retrieves a destination URL or an anchor point.
+     */
+    href: string;
+    /**
+     * Sets or retrieves the language code of the object.
+     */
+    hreflang: string;
+    /**
+     * Sets or retrieves the media type.
+     */
+    media: string;
+    /**
+     * Sets or retrieves the relationship between the object and the destination of the link.
+     */
+    rel: string;
+    /**
+     * Sets or retrieves the relationship between the object and the destination of the link.
+     */
+    rev: string;
+    /**
+     * Sets or retrieves the window or frame at which to target content.
+     */
+    target: string;
+    /**
+     * Sets or retrieves the MIME type of the object.
+     */
+    type: string;
+    import?: Document;
+    integrity: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLLinkElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLLinkElement: {
+    prototype: HTMLLinkElement;
+    new(): HTMLLinkElement;
+};
+
+interface HTMLMapElement extends HTMLElement {
+    /**
+     * Retrieves a collection of the area objects defined for the given map object.
+     */
+    readonly areas: HTMLAreasCollection;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLMapElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLMapElement: {
+    prototype: HTMLMapElement;
+    new(): HTMLMapElement;
+};
+
+interface HTMLMarqueeElementEventMap extends HTMLElementEventMap {
+    "bounce": Event;
+    "finish": Event;
+    "start": Event;
+}
+
+interface HTMLMarqueeElement extends HTMLElement {
+    behavior: string;
+    bgColor: any;
+    direction: string;
+    height: string;
+    hspace: number;
+    loop: number;
+    onbounce: (this: HTMLMarqueeElement, ev: Event) => any;
+    onfinish: (this: HTMLMarqueeElement, ev: Event) => any;
+    onstart: (this: HTMLMarqueeElement, ev: Event) => any;
+    scrollAmount: number;
+    scrollDelay: number;
+    trueSpeed: boolean;
+    vspace: number;
+    width: string;
+    start(): void;
+    stop(): void;
+    addEventListener<K extends keyof HTMLMarqueeElementEventMap>(type: K, listener: (this: HTMLMarqueeElement, ev: HTMLMarqueeElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLMarqueeElement: {
+    prototype: HTMLMarqueeElement;
+    new(): HTMLMarqueeElement;
+};
+
+interface HTMLMediaElementEventMap extends HTMLElementEventMap {
+    "encrypted": MediaEncryptedEvent;
+    "msneedkey": MSMediaKeyNeededEvent;
+}
+
+interface HTMLMediaElement extends HTMLElement {
+    /**
+     * Returns an AudioTrackList object with the audio tracks for a given video element.
+     */
+    readonly audioTracks: AudioTrackList;
+    /**
+     * Gets or sets a value that indicates whether to start playing the media automatically.
+     */
+    autoplay: boolean;
+    /**
+     * Gets a collection of buffered time ranges.
+     */
+    readonly buffered: TimeRanges;
+    /**
+     * Gets or sets a flag that indicates whether the client provides a set of controls for the media (in case the developer does not include controls for the player).
+     */
+    controls: boolean;
+    crossOrigin: string | null;
+    /**
+     * Gets the address or URL of the current media resource that is selected by IHTMLMediaElement.
+     */
+    readonly currentSrc: string;
+    /**
+     * Gets or sets the current playback position, in seconds.
+     */
+    currentTime: number;
+    defaultMuted: boolean;
+    /**
+     * Gets or sets the default playback rate when the user is not using fast forward or reverse for a video or audio resource.
+     */
+    defaultPlaybackRate: number;
+    /**
+     * Returns the duration in seconds of the current media resource. A NaN value is returned if duration is not available, or Infinity if the media resource is streaming.
+     */
+    readonly duration: number;
+    /**
+     * Gets information about whether the playback has ended or not.
+     */
+    readonly ended: boolean;
+    /**
+     * Returns an object representing the current error state of the audio or video element.
+     */
+    readonly error: MediaError;
+    /**
+     * Gets or sets a flag to specify whether playback should restart after it completes.
+     */
+    loop: boolean;
+    readonly mediaKeys: MediaKeys | null;
+    /**
+     * Specifies the purpose of the audio or video media, such as background audio or alerts.
+     */
+    msAudioCategory: string;
+    /**
+     * Specifies the output device id that the audio will be sent to.
+     */
+    msAudioDeviceType: string;
+    readonly msGraphicsTrustStatus: MSGraphicsTrust;
+    /**
+     * Gets the MSMediaKeys object, which is used for decrypting media data, that is associated with this media element.
+     */
+    readonly msKeys: MSMediaKeys;
+    /**
+     * Gets or sets whether the DLNA PlayTo device is available.
+     */
+    msPlayToDisabled: boolean;
+    /**
+     * Gets or sets the path to the preferred media source. This enables the Play To target device to stream the media content, which can be DRM protected, from a different location, such as a cloud media server.
+     */
+    msPlayToPreferredSourceUri: string;
+    /**
+     * Gets or sets the primary DLNA PlayTo device.
+     */
+    msPlayToPrimary: boolean;
+    /**
+     * Gets the source associated with the media element for use by the PlayToManager.
+     */
+    readonly msPlayToSource: any;
+    /**
+     * Specifies whether or not to enable low-latency playback on the media element.
+     */
+    msRealTime: boolean;
+    /**
+     * Gets or sets a flag that indicates whether the audio (either audio or the audio track on video media) is muted.
+     */
+    muted: boolean;
+    /**
+     * Gets the current network activity for the element.
+     */
+    readonly networkState: number;
+    onencrypted: (this: HTMLMediaElement, ev: MediaEncryptedEvent) => any;
+    onmsneedkey: (this: HTMLMediaElement, ev: MSMediaKeyNeededEvent) => any;
+    /**
+     * Gets a flag that specifies whether playback is paused.
+     */
+    readonly paused: boolean;
+    /**
+     * Gets or sets the current rate of speed for the media resource to play. This speed is expressed as a multiple of the normal speed of the media resource.
+     */
+    playbackRate: number;
+    /**
+     * Gets TimeRanges for the current media resource that has been played.
+     */
+    readonly played: TimeRanges;
+    /**
+     * Gets or sets the current playback position, in seconds.
+     */
+    preload: string;
+    readyState: number;
+    /**
+     * Returns a TimeRanges object that represents the ranges of the current media resource that can be seeked.
+     */
+    readonly seekable: TimeRanges;
+    /**
+     * Gets a flag that indicates whether the the client is currently moving to a new playback position in the media resource.
+     */
+    readonly seeking: boolean;
+    /**
+     * The address or URL of the a media resource that is to be considered.
+     */
+    src: string;
+    srcObject: MediaStream | null;
+    readonly textTracks: TextTrackList;
+    readonly videoTracks: VideoTrackList;
+    /**
+     * Gets or sets the volume level for audio portions of the media element.
+     */
+    volume: number;
+    addTextTrack(kind: string, label?: string, language?: string): TextTrack;
+    /**
+     * Returns a string that specifies whether the client can play a given media resource type.
+     */
+    canPlayType(type: string): string;
+    /**
+     * Resets the audio or video object and loads a new media resource.
+     */
+    load(): void;
+    /**
+     * Clears all effects from the media pipeline.
+     */
+    msClearEffects(): void;
+    msGetAsCastingSource(): any;
+    /**
+     * Inserts the specified audio effect into media pipeline.
+     */
+    msInsertAudioEffect(activatableClassId: string, effectRequired: boolean, config?: any): void;
+    msSetMediaKeys(mediaKeys: MSMediaKeys): void;
+    /**
+     * Specifies the media protection manager for a given media pipeline.
+     */
+    msSetMediaProtectionManager(mediaProtectionManager?: any): void;
+    /**
+     * Pauses the current playback and sets paused to TRUE. This can be used to test whether the media is playing or paused. You can also use the pause or play events to tell whether the media is playing or not.
+     */
+    pause(): void;
+    /**
+     * Loads and starts playback of a media resource.
+     */
+    play(): Promise<void>;
+    setMediaKeys(mediaKeys: MediaKeys | null): Promise<void>;
+    readonly HAVE_CURRENT_DATA: number;
+    readonly HAVE_ENOUGH_DATA: number;
+    readonly HAVE_FUTURE_DATA: number;
+    readonly HAVE_METADATA: number;
+    readonly HAVE_NOTHING: number;
+    readonly NETWORK_EMPTY: number;
+    readonly NETWORK_IDLE: number;
+    readonly NETWORK_LOADING: number;
+    readonly NETWORK_NO_SOURCE: number;
+    addEventListener<K extends keyof HTMLMediaElementEventMap>(type: K, listener: (this: HTMLMediaElement, ev: HTMLMediaElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLMediaElement: {
+    prototype: HTMLMediaElement;
+    new(): HTMLMediaElement;
+    readonly HAVE_CURRENT_DATA: number;
+    readonly HAVE_ENOUGH_DATA: number;
+    readonly HAVE_FUTURE_DATA: number;
+    readonly HAVE_METADATA: number;
+    readonly HAVE_NOTHING: number;
+    readonly NETWORK_EMPTY: number;
+    readonly NETWORK_IDLE: number;
+    readonly NETWORK_LOADING: number;
+    readonly NETWORK_NO_SOURCE: number;
+};
+
+interface HTMLMenuElement extends HTMLElement {
+    compact: boolean;
+    type: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLMenuElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLMenuElement: {
+    prototype: HTMLMenuElement;
+    new(): HTMLMenuElement;
+};
+
+interface HTMLMetaElement extends HTMLElement {
+    /**
+     * Sets or retrieves the character set used to encode the object.
+     */
+    charset: string;
+    /**
+     * Gets or sets meta-information to associate with httpEquiv or name.
+     */
+    content: string;
+    /**
+     * Gets or sets information used to bind the value of a content attribute of a meta element to an HTTP response header.
+     */
+    httpEquiv: string;
+    /**
+     * Sets or retrieves the value specified in the content attribute of the meta object.
+     */
+    name: string;
+    /**
+     * Sets or retrieves a scheme to be used in interpreting the value of a property specified for the object.
+     */
+    scheme: string;
+    /**
+     * Sets or retrieves the URL property that will be loaded after the specified time has elapsed.
+     */
+    url: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLMetaElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLMetaElement: {
+    prototype: HTMLMetaElement;
+    new(): HTMLMetaElement;
+};
+
+interface HTMLMeterElement extends HTMLElement {
+    high: number;
+    low: number;
+    max: number;
+    min: number;
+    optimum: number;
+    value: number;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLMeterElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLMeterElement: {
+    prototype: HTMLMeterElement;
+    new(): HTMLMeterElement;
+};
+
+interface HTMLModElement extends HTMLElement {
+    /**
+     * Sets or retrieves reference information about the object.
+     */
+    cite: string;
+    /**
+     * Sets or retrieves the date and time of a modification to the object.
+     */
+    dateTime: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLModElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLModElement: {
+    prototype: HTMLModElement;
+    new(): HTMLModElement;
+};
+
+interface HTMLObjectElement extends HTMLElement, GetSVGDocument {
+    align: string;
+    /**
+     * Sets or retrieves a text alternative to the graphic.
+     */
+    alt: string;
+    /**
+     * Gets or sets the optional alternative HTML script to execute if the object fails to load.
+     */
+    altHtml: string;
+    /**
+     * Sets or retrieves a character string that can be used to implement your own archive functionality for the object.
+     */
+    archive: string;
+    /**
+     * Retrieves a string of the URL where the object tag can be found. This is often the href of the document that the object is in, or the value set by a base element.
+     */
+    readonly BaseHref: string;
+    border: string;
+    /**
+     * Sets or retrieves the URL of the file containing the compiled Java class.
+     */
+    code: string;
+    /**
+     * Sets or retrieves the URL of the component.
+     */
+    codeBase: string;
+    /**
+     * Sets or retrieves the Internet media type for the code associated with the object.
+     */
+    codeType: string;
+    /**
+     * Retrieves the document object of the page or frame.
+     */
+    readonly contentDocument: Document;
+    /**
+     * Sets or retrieves the URL that references the data of the object.
+     */
+    data: string;
+    declare: boolean;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: string;
+    hspace: number;
+    /**
+     * Gets or sets whether the DLNA PlayTo device is available.
+     */
+    msPlayToDisabled: boolean;
+    /**
+     * Gets or sets the path to the preferred media source. This enables the Play To target device to stream the media content, which can be DRM protected, from a different location, such as a cloud media server.
+     */
+    msPlayToPreferredSourceUri: string;
+    /**
+     * Gets or sets the primary DLNA PlayTo device.
+     */
+    msPlayToPrimary: boolean;
+    /**
+     * Gets the source associated with the media element for use by the PlayToManager.
+     */
+    readonly msPlayToSource: any;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    readonly readyState: number;
+    /**
+     * Sets or retrieves a message to be displayed while an object is loading.
+     */
+    standby: string;
+    /**
+     * Sets or retrieves the MIME type of the object.
+     */
+    type: string;
+    /**
+     * Sets or retrieves the URL, often with a bookmark extension (#name), to use as a client-side image map.
+     */
+    useMap: string;
+    /**
+     * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
+     */
+    readonly validationMessage: string;
+    /**
+     * Returns a  ValidityState object that represents the validity states of an element.
+     */
+    readonly validity: ValidityState;
+    vspace: number;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: string;
+    /**
+     * Returns whether an element will successfully validate based on forms validation rules and constraints.
+     */
+    readonly willValidate: boolean;
+    /**
+     * Returns whether a form will validate when it is submitted, without having to submit it.
+     */
+    checkValidity(): boolean;
+    /**
+     * Sets a custom error message that is displayed when a form is submitted.
+     * @param error Sets a custom error message that is displayed when a form is submitted.
+     */
+    setCustomValidity(error: string): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLObjectElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLObjectElement: {
+    prototype: HTMLObjectElement;
+    new(): HTMLObjectElement;
+};
+
+interface HTMLOListElement extends HTMLElement {
+    compact: boolean;
+    /**
+     * The starting number.
+     */
+    start: number;
+    type: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLOListElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLOListElement: {
+    prototype: HTMLOListElement;
+    new(): HTMLOListElement;
+};
+
+interface HTMLOptGroupElement extends HTMLElement {
+    /**
+     * Sets or retrieves the status of an option.
+     */
+    defaultSelected: boolean;
+    disabled: boolean;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Sets or retrieves the ordinal position of an option in a list box.
+     */
+    readonly index: number;
+    /**
+     * Sets or retrieves a value that you can use to implement your own label functionality for the object.
+     */
+    label: string;
+    /**
+     * Sets or retrieves whether the option in the list box is the default item.
+     */
+    selected: boolean;
+    /**
+     * Sets or retrieves the text string specified by the option tag.
+     */
+    readonly text: string;
+    /**
+     * Sets or retrieves the value which is returned to the server when the form control is submitted.
+     */
+    value: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLOptGroupElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLOptGroupElement: {
+    prototype: HTMLOptGroupElement;
+    new(): HTMLOptGroupElement;
+};
+
+interface HTMLOptionElement extends HTMLElement {
+    /**
+     * Sets or retrieves the status of an option.
+     */
+    defaultSelected: boolean;
+    disabled: boolean;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Sets or retrieves the ordinal position of an option in a list box.
+     */
+    readonly index: number;
+    /**
+     * Sets or retrieves a value that you can use to implement your own label functionality for the object.
+     */
+    label: string;
+    /**
+     * Sets or retrieves whether the option in the list box is the default item.
+     */
+    selected: boolean;
+    /**
+     * Sets or retrieves the text string specified by the option tag.
+     */
+    text: string;
+    /**
+     * Sets or retrieves the value which is returned to the server when the form control is submitted.
+     */
+    value: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLOptionElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLOptionElement: {
+    prototype: HTMLOptionElement;
+    new(): HTMLOptionElement;
+};
+
+interface HTMLOptionsCollection extends HTMLCollectionOf<HTMLOptionElement> {
+    length: number;
+    selectedIndex: number;
+    add(element: HTMLOptionElement | HTMLOptGroupElement, before?: HTMLElement | number): void;
+    remove(index: number): void;
+}
+
+declare var HTMLOptionsCollection: {
+    prototype: HTMLOptionsCollection;
+    new(): HTMLOptionsCollection;
+};
+
+interface HTMLOutputElement extends HTMLElement {
+    defaultValue: string;
+    readonly form: HTMLFormElement;
+    readonly htmlFor: DOMSettableTokenList;
+    name: string;
+    readonly type: string;
+    readonly validationMessage: string;
+    readonly validity: ValidityState;
+    value: string;
+    readonly willValidate: boolean;
+    checkValidity(): boolean;
+    reportValidity(): boolean;
+    setCustomValidity(error: string): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLOutputElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLOutputElement: {
+    prototype: HTMLOutputElement;
+    new(): HTMLOutputElement;
+};
+
+interface HTMLParagraphElement extends HTMLElement {
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    clear: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLParagraphElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLParagraphElement: {
+    prototype: HTMLParagraphElement;
+    new(): HTMLParagraphElement;
+};
+
+interface HTMLParamElement extends HTMLElement {
+    /**
+     * Sets or retrieves the name of an input parameter for an element.
+     */
+    name: string;
+    /**
+     * Sets or retrieves the content type of the resource designated by the value attribute.
+     */
+    type: string;
+    /**
+     * Sets or retrieves the value of an input parameter for an element.
+     */
+    value: string;
+    /**
+     * Sets or retrieves the data type of the value attribute.
+     */
+    valueType: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLParamElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLParamElement: {
+    prototype: HTMLParamElement;
+    new(): HTMLParamElement;
+};
+
+interface HTMLPictureElement extends HTMLElement {
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLPictureElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLPictureElement: {
+    prototype: HTMLPictureElement;
+    new(): HTMLPictureElement;
+};
+
+interface HTMLPreElement extends HTMLElement {
+    /**
+     * Sets or gets a value that you can use to implement your own width functionality for the object.
+     */
+    width: number;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLPreElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLPreElement: {
+    prototype: HTMLPreElement;
+    new(): HTMLPreElement;
+};
+
+interface HTMLProgressElement extends HTMLElement {
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Defines the maximum, or "done" value for a progress element.
+     */
+    max: number;
+    /**
+     * Returns the quotient of value/max when the value attribute is set (determinate progress bar), or -1 when the value attribute is missing (indeterminate progress bar).
+     */
+    readonly position: number;
+    /**
+     * Sets or gets the current value of a progress element. The value must be a non-negative number between 0 and the max value.
+     */
+    value: number;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLProgressElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLProgressElement: {
+    prototype: HTMLProgressElement;
+    new(): HTMLProgressElement;
+};
+
+interface HTMLQuoteElement extends HTMLElement {
+    /**
+     * Sets or retrieves reference information about the object.
+     */
+    cite: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLQuoteElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLQuoteElement: {
+    prototype: HTMLQuoteElement;
+    new(): HTMLQuoteElement;
+};
+
+interface HTMLScriptElement extends HTMLElement {
+    async: boolean;
+    /**
+     * Sets or retrieves the character set used to encode the object.
+     */
+    charset: string;
+    crossOrigin: string | null;
+    /**
+     * Sets or retrieves the status of the script.
+     */
+    defer: boolean;
+    /**
+     * Sets or retrieves the event for which the script is written.
+     */
+    event: string;
+    /**
+     * Sets or retrieves the object that is bound to the event script.
+     */
+    htmlFor: string;
+    /**
+     * Retrieves the URL to an external file that contains the source code or data.
+     */
+    src: string;
+    /**
+     * Retrieves or sets the text of the object as a string.
+     */
+    text: string;
+    /**
+     * Sets or retrieves the MIME type for the associated scripting engine.
+     */
+    type: string;
+    integrity: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLScriptElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLScriptElement: {
+    prototype: HTMLScriptElement;
+    new(): HTMLScriptElement;
+};
+
+interface HTMLSelectElement extends HTMLElement {
+    /**
+     * Provides a way to direct a user to a specific field when a document loads. This can provide both direction and convenience for a user, reducing the need to click or tab to a field when a page opens. This attribute is true when present on an element, and false when missing.
+     */
+    autofocus: boolean;
+    disabled: boolean;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Sets or retrieves the number of objects in a collection.
+     */
+    length: number;
+    /**
+     * Sets or retrieves the Boolean value indicating whether multiple items can be selected from a list.
+     */
+    multiple: boolean;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    readonly options: HTMLOptionsCollection;
+    /**
+     * When present, marks an element that can't be submitted without a value.
+     */
+    required: boolean;
+    /**
+     * Sets or retrieves the index of the selected option in a select object.
+     */
+    selectedIndex: number;
+    selectedOptions: HTMLCollectionOf<HTMLOptionElement>;
+    /**
+     * Sets or retrieves the number of rows in the list box.
+     */
+    size: number;
+    /**
+     * Retrieves the type of select control based on the value of the MULTIPLE attribute.
+     */
+    readonly type: string;
+    /**
+     * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
+     */
+    readonly validationMessage: string;
+    /**
+     * Returns a  ValidityState object that represents the validity states of an element.
+     */
+    readonly validity: ValidityState;
+    /**
+     * Sets or retrieves the value which is returned to the server when the form control is submitted.
+     */
+    value: string;
+    /**
+     * Returns whether an element will successfully validate based on forms validation rules and constraints.
+     */
+    readonly willValidate: boolean;
+    /**
+     * Adds an element to the areas, controlRange, or options collection.
+     * @param element Variant of type Number that specifies the index position in the collection where the element is placed. If no value is given, the method places the element at the end of the collection.
+     * @param before Variant of type Object that specifies an element to insert before, or null to append the object to the collection.
+     */
+    add(element: HTMLElement, before?: HTMLElement | number): void;
+    /**
+     * Returns whether a form will validate when it is submitted, without having to submit it.
+     */
+    checkValidity(): boolean;
+    /**
+     * Retrieves a select object or an object from an options collection.
+     * @param name Variant of type Number or String that specifies the object or collection to retrieve. If this parameter is an integer, it is the zero-based index of the object. If this parameter is a string, all objects with matching name or id properties are retrieved, and a collection is returned if more than one match is made.
+     * @param index Variant of type Number that specifies the zero-based index of the object to retrieve when a collection is returned.
+     */
+    item(name?: any, index?: any): any;
+    /**
+     * Retrieves a select object or an object from an options collection.
+     * @param namedItem A String that specifies the name or id property of the object to retrieve. A collection is returned if more than one match is made.
+     */
+    namedItem(name: string): any;
+    /**
+     * Removes an element from the collection.
+     * @param index Number that specifies the zero-based index of the element to remove from the collection.
+     */
+    remove(index?: number): void;
+    /**
+     * Sets a custom error message that is displayed when a form is submitted.
+     * @param error Sets a custom error message that is displayed when a form is submitted.
+     */
+    setCustomValidity(error: string): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLSelectElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+    [name: string]: any;
+}
+
+declare var HTMLSelectElement: {
+    prototype: HTMLSelectElement;
+    new(): HTMLSelectElement;
+};
+
+interface HTMLSourceElement extends HTMLElement {
+    /**
+     * Gets or sets the intended media type of the media source.
+     */
+    media: string;
+    msKeySystem: string;
+    sizes: string;
+    /**
+     * The address or URL of the a media resource that is to be considered.
+     */
+    src: string;
+    srcset: string;
+    /**
+     * Gets or sets the MIME type of a media resource.
+     */
+    type: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLSourceElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLSourceElement: {
+    prototype: HTMLSourceElement;
+    new(): HTMLSourceElement;
+};
+
+interface HTMLSpanElement extends HTMLElement {
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLSpanElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLSpanElement: {
+    prototype: HTMLSpanElement;
+    new(): HTMLSpanElement;
+};
+
+interface HTMLStyleElement extends HTMLElement, LinkStyle {
+    disabled: boolean;
+    /**
+     * Sets or retrieves the media type.
+     */
+    media: string;
+    /**
+     * Retrieves the CSS language in which the style sheet is written.
+     */
+    type: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLStyleElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLStyleElement: {
+    prototype: HTMLStyleElement;
+    new(): HTMLStyleElement;
+};
+
+interface HTMLTableCaptionElement extends HTMLElement {
+    /**
+     * Sets or retrieves the alignment of the caption or legend.
+     */
+    align: string;
+    /**
+     * Sets or retrieves whether the caption appears at the top or bottom of the table.
+     */
+    vAlign: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTableCaptionElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTableCaptionElement: {
+    prototype: HTMLTableCaptionElement;
+    new(): HTMLTableCaptionElement;
+};
+
+interface HTMLTableCellElement extends HTMLElement, HTMLTableAlignment {
+    /**
+     * Sets or retrieves abbreviated text for the object.
+     */
+    abbr: string;
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    /**
+     * Sets or retrieves a comma-delimited list of conceptual categories associated with the object.
+     */
+    axis: string;
+    bgColor: any;
+    /**
+     * Retrieves the position of the object in the cells collection of a row.
+     */
+    readonly cellIndex: number;
+    /**
+     * Sets or retrieves the number columns in the table that the object should span.
+     */
+    colSpan: number;
+    /**
+     * Sets or retrieves a list of header cells that provide information for the object.
+     */
+    headers: string;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: any;
+    /**
+     * Sets or retrieves whether the browser automatically performs wordwrap.
+     */
+    noWrap: boolean;
+    /**
+     * Sets or retrieves how many rows in a table the cell should span.
+     */
+    rowSpan: number;
+    /**
+     * Sets or retrieves the group of cells in a table to which the object's information applies.
+     */
+    scope: string;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTableCellElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTableCellElement: {
+    prototype: HTMLTableCellElement;
+    new(): HTMLTableCellElement;
+};
+
+interface HTMLTableColElement extends HTMLElement, HTMLTableAlignment {
+    /**
+     * Sets or retrieves the alignment of the object relative to the display or table.
+     */
+    align: string;
+    /**
+     * Sets or retrieves the number of columns in the group.
+     */
+    span: number;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: any;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTableColElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTableColElement: {
+    prototype: HTMLTableColElement;
+    new(): HTMLTableColElement;
+};
+
+interface HTMLTableDataCellElement extends HTMLTableCellElement {
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTableDataCellElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTableDataCellElement: {
+    prototype: HTMLTableDataCellElement;
+    new(): HTMLTableDataCellElement;
+};
+
+interface HTMLTableElement extends HTMLElement {
+    /**
+     * Sets or retrieves a value that indicates the table alignment.
+     */
+    align: string;
+    bgColor: any;
+    /**
+     * Sets or retrieves the width of the border to draw around the object.
+     */
+    border: string;
+    /**
+     * Sets or retrieves the border color of the object.
+     */
+    borderColor: any;
+    /**
+     * Retrieves the caption object of a table.
+     */
+    caption: HTMLTableCaptionElement;
+    /**
+     * Sets or retrieves the amount of space between the border of the cell and the content of the cell.
+     */
+    cellPadding: string;
+    /**
+     * Sets or retrieves the amount of space between cells in a table.
+     */
+    cellSpacing: string;
+    /**
+     * Sets or retrieves the number of columns in the table.
+     */
+    cols: number;
+    /**
+     * Sets or retrieves the way the border frame around the table is displayed.
+     */
+    frame: string;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: any;
+    /**
+     * Sets or retrieves the number of horizontal rows contained in the object.
+     */
+    rows: HTMLCollectionOf<HTMLTableRowElement>;
+    /**
+     * Sets or retrieves which dividing lines (inner borders) are displayed.
+     */
+    rules: string;
+    /**
+     * Sets or retrieves a description and/or structure of the object.
+     */
+    summary: string;
+    /**
+     * Retrieves a collection of all tBody objects in the table. Objects in this collection are in source order.
+     */
+    tBodies: HTMLCollectionOf<HTMLTableSectionElement>;
+    /**
+     * Retrieves the tFoot object of the table.
+     */
+    tFoot: HTMLTableSectionElement;
+    /**
+     * Retrieves the tHead object of the table.
+     */
+    tHead: HTMLTableSectionElement;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: string;
+    /**
+     * Creates an empty caption element in the table.
+     */
+    createCaption(): HTMLTableCaptionElement;
+    /**
+     * Creates an empty tBody element in the table.
+     */
+    createTBody(): HTMLTableSectionElement;
+    /**
+     * Creates an empty tFoot element in the table.
+     */
+    createTFoot(): HTMLTableSectionElement;
+    /**
+     * Returns the tHead element object if successful, or null otherwise.
+     */
+    createTHead(): HTMLTableSectionElement;
+    /**
+     * Deletes the caption element and its contents from the table.
+     */
+    deleteCaption(): void;
+    /**
+     * Removes the specified row (tr) from the element and from the rows collection.
+     * @param index Number that specifies the zero-based position in the rows collection of the row to remove.
+     */
+    deleteRow(index?: number): void;
+    /**
+     * Deletes the tFoot element and its contents from the table.
+     */
+    deleteTFoot(): void;
+    /**
+     * Deletes the tHead element and its contents from the table.
+     */
+    deleteTHead(): void;
+    /**
+     * Creates a new row (tr) in the table, and adds the row to the rows collection.
+     * @param index Number that specifies where to insert the row in the rows collection. The default value is -1, which appends the new row to the end of the rows collection.
+     */
+    insertRow(index?: number): HTMLTableRowElement;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTableElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTableElement: {
+    prototype: HTMLTableElement;
+    new(): HTMLTableElement;
+};
+
+interface HTMLTableHeaderCellElement extends HTMLTableCellElement {
+    /**
+     * Sets or retrieves the group of cells in a table to which the object's information applies.
+     */
+    scope: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTableHeaderCellElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTableHeaderCellElement: {
+    prototype: HTMLTableHeaderCellElement;
+    new(): HTMLTableHeaderCellElement;
+};
+
+interface HTMLTableRowElement extends HTMLElement, HTMLTableAlignment {
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    bgColor: any;
+    /**
+     * Retrieves a collection of all cells in the table row.
+     */
+    cells: HTMLCollectionOf<HTMLTableDataCellElement | HTMLTableHeaderCellElement>;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: any;
+    /**
+     * Retrieves the position of the object in the rows collection for the table.
+     */
+    readonly rowIndex: number;
+    /**
+     * Retrieves the position of the object in the collection.
+     */
+    readonly sectionRowIndex: number;
+    /**
+     * Removes the specified cell from the table row, as well as from the cells collection.
+     * @param index Number that specifies the zero-based position of the cell to remove from the table row. If no value is provided, the last cell in the cells collection is deleted.
+     */
+    deleteCell(index?: number): void;
+    /**
+     * Creates a new cell in the table row, and adds the cell to the cells collection.
+     * @param index Number that specifies where to insert the cell in the tr. The default value is -1, which appends the new cell to the end of the cells collection.
+     */
+    insertCell(index?: number): HTMLTableDataCellElement;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTableRowElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTableRowElement: {
+    prototype: HTMLTableRowElement;
+    new(): HTMLTableRowElement;
+};
+
+interface HTMLTableSectionElement extends HTMLElement, HTMLTableAlignment {
+    /**
+     * Sets or retrieves a value that indicates the table alignment.
+     */
+    align: string;
+    /**
+     * Sets or retrieves the number of horizontal rows contained in the object.
+     */
+    rows: HTMLCollectionOf<HTMLTableRowElement>;
+    /**
+     * Removes the specified row (tr) from the element and from the rows collection.
+     * @param index Number that specifies the zero-based position in the rows collection of the row to remove.
+     */
+    deleteRow(index?: number): void;
+    /**
+     * Creates a new row (tr) in the table, and adds the row to the rows collection.
+     * @param index Number that specifies where to insert the row in the rows collection. The default value is -1, which appends the new row to the end of the rows collection.
+     */
+    insertRow(index?: number): HTMLTableRowElement;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTableSectionElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTableSectionElement: {
+    prototype: HTMLTableSectionElement;
+    new(): HTMLTableSectionElement;
+};
+
+interface HTMLTemplateElement extends HTMLElement {
+    readonly content: DocumentFragment;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTemplateElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTemplateElement: {
+    prototype: HTMLTemplateElement;
+    new(): HTMLTemplateElement;
+};
+
+interface HTMLTextAreaElement extends HTMLElement {
+    /**
+     * Provides a way to direct a user to a specific field when a document loads. This can provide both direction and convenience for a user, reducing the need to click or tab to a field when a page opens. This attribute is true when present on an element, and false when missing.
+     */
+    autofocus: boolean;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    cols: number;
+    /**
+     * Sets or retrieves the initial contents of the object.
+     */
+    defaultValue: string;
+    disabled: boolean;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Sets or retrieves the maximum number of characters that the user can enter in a text control.
+     */
+    maxLength: number;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    /**
+     * Gets or sets a text string that is displayed in an input field as a hint or prompt to users as the format or type of information they need to enter.The text appears in an input field until the user puts focus on the field.
+     */
+    placeholder: string;
+    /**
+     * Sets or retrieves the value indicated whether the content of the object is read-only.
+     */
+    readOnly: boolean;
+    /**
+     * When present, marks an element that can't be submitted without a value.
+     */
+    required: boolean;
+    /**
+     * Sets or retrieves the number of horizontal rows contained in the object.
+     */
+    rows: number;
+    /**
+     * Gets or sets the end position or offset of a text selection.
+     */
+    selectionEnd: number;
+    /**
+     * Gets or sets the starting position or offset of a text selection.
+     */
+    selectionStart: number;
+    /**
+     * Sets or retrieves the value indicating whether the control is selected.
+     */
+    status: any;
+    /**
+     * Retrieves the type of control.
+     */
+    readonly type: string;
+    /**
+     * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
+     */
+    readonly validationMessage: string;
+    /**
+     * Returns a  ValidityState object that represents the validity states of an element.
+     */
+    readonly validity: ValidityState;
+    /**
+     * Retrieves or sets the text in the entry field of the textArea element.
+     */
+    value: string;
+    /**
+     * Returns whether an element will successfully validate based on forms validation rules and constraints.
+     */
+    readonly willValidate: boolean;
+    /**
+     * Sets or retrieves how to handle wordwrapping in the object.
+     */
+    wrap: string;
+    minLength: number;
+    /**
+     * Returns whether a form will validate when it is submitted, without having to submit it.
+     */
+    checkValidity(): boolean;
+    /**
+     * Highlights the input area of a form element.
+     */
+    select(): void;
+    /**
+     * Sets a custom error message that is displayed when a form is submitted.
+     * @param error Sets a custom error message that is displayed when a form is submitted.
+     */
+    setCustomValidity(error: string): void;
+    /**
+     * Sets the start and end positions of a selection in a text field.
+     * @param start The offset into the text field for the start of the selection.
+     * @param end The offset into the text field for the end of the selection.
+     */
+    setSelectionRange(start: number, end: number): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTextAreaElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTextAreaElement: {
+    prototype: HTMLTextAreaElement;
+    new(): HTMLTextAreaElement;
+};
+
+interface HTMLTimeElement extends HTMLElement {
+    dateTime: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTimeElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTimeElement: {
+    prototype: HTMLTimeElement;
+    new(): HTMLTimeElement;
+};
+
+interface HTMLTitleElement extends HTMLElement {
+    /**
+     * Retrieves or sets the text of the object as a string.
+     */
+    text: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTitleElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTitleElement: {
+    prototype: HTMLTitleElement;
+    new(): HTMLTitleElement;
+};
+
+interface HTMLTrackElement extends HTMLElement {
+    default: boolean;
+    kind: string;
+    label: string;
+    readonly readyState: number;
+    src: string;
+    srclang: string;
+    readonly track: TextTrack;
+    readonly ERROR: number;
+    readonly LOADED: number;
+    readonly LOADING: number;
+    readonly NONE: number;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTrackElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTrackElement: {
+    prototype: HTMLTrackElement;
+    new(): HTMLTrackElement;
+    readonly ERROR: number;
+    readonly LOADED: number;
+    readonly LOADING: number;
+    readonly NONE: number;
+};
+
+interface HTMLUListElement extends HTMLElement {
+    compact: boolean;
+    type: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLUListElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLUListElement: {
+    prototype: HTMLUListElement;
+    new(): HTMLUListElement;
+};
+
+interface HTMLUnknownElement extends HTMLElement {
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLUnknownElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLUnknownElement: {
+    prototype: HTMLUnknownElement;
+    new(): HTMLUnknownElement;
+};
+
+interface HTMLVideoElementEventMap extends HTMLMediaElementEventMap {
+    "MSVideoFormatChanged": Event;
+    "MSVideoFrameStepCompleted": Event;
+    "MSVideoOptimalLayoutChanged": Event;
+}
+
+interface HTMLVideoElement extends HTMLMediaElement {
+    /**
+     * Gets or sets the height of the video element.
+     */
+    height: number;
+    msHorizontalMirror: boolean;
+    readonly msIsLayoutOptimalForPlayback: boolean;
+    readonly msIsStereo3D: boolean;
+    msStereo3DPackingMode: string;
+    msStereo3DRenderMode: string;
+    msZoom: boolean;
+    onMSVideoFormatChanged: (this: HTMLVideoElement, ev: Event) => any;
+    onMSVideoFrameStepCompleted: (this: HTMLVideoElement, ev: Event) => any;
+    onMSVideoOptimalLayoutChanged: (this: HTMLVideoElement, ev: Event) => any;
+    /**
+     * Gets or sets a URL of an image to display, for example, like a movie poster. This can be a still frame from the video, or another image if no video data is available.
+     */
+    poster: string;
+    /**
+     * Gets the intrinsic height of a video in CSS pixels, or zero if the dimensions are not known.
+     */
+    readonly videoHeight: number;
+    /**
+     * Gets the intrinsic width of a video in CSS pixels, or zero if the dimensions are not known.
+     */
+    readonly videoWidth: number;
+    readonly webkitDisplayingFullscreen: boolean;
+    readonly webkitSupportsFullscreen: boolean;
+    /**
+     * Gets or sets the width of the video element.
+     */
+    width: number;
+    getVideoPlaybackQuality(): VideoPlaybackQuality;
+    msFrameStep(forward: boolean): void;
+    msInsertVideoEffect(activatableClassId: string, effectRequired: boolean, config?: any): void;
+    msSetVideoRectangle(left: number, top: number, right: number, bottom: number): void;
+    webkitEnterFullscreen(): void;
+    webkitEnterFullScreen(): void;
+    webkitExitFullscreen(): void;
+    webkitExitFullScreen(): void;
+    addEventListener<K extends keyof HTMLVideoElementEventMap>(type: K, listener: (this: HTMLVideoElement, ev: HTMLVideoElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLVideoElement: {
+    prototype: HTMLVideoElement;
+    new(): HTMLVideoElement;
+};
+
+interface IDBCursor {
+    readonly direction: IDBCursorDirection;
+    key: IDBKeyRange | IDBValidKey;
+    readonly primaryKey: any;
+    source: IDBObjectStore | IDBIndex;
+    advance(count: number): void;
+    continue(key?: IDBKeyRange | IDBValidKey): void;
+    delete(): IDBRequest;
+    update(value: any): IDBRequest;
+    readonly NEXT: string;
+    readonly NEXT_NO_DUPLICATE: string;
+    readonly PREV: string;
+    readonly PREV_NO_DUPLICATE: string;
+}
+
+declare var IDBCursor: {
+    prototype: IDBCursor;
+    new(): IDBCursor;
+    readonly NEXT: string;
+    readonly NEXT_NO_DUPLICATE: string;
+    readonly PREV: string;
+    readonly PREV_NO_DUPLICATE: string;
+};
+
+interface IDBCursorWithValue extends IDBCursor {
+    readonly value: any;
+}
+
+declare var IDBCursorWithValue: {
+    prototype: IDBCursorWithValue;
+    new(): IDBCursorWithValue;
+};
+
+interface IDBDatabaseEventMap {
+    "abort": Event;
+    "error": Event;
+}
+
+interface IDBDatabase extends EventTarget {
+    readonly name: string;
+    readonly objectStoreNames: DOMStringList;
+    onabort: (this: IDBDatabase, ev: Event) => any;
+    onerror: (this: IDBDatabase, ev: Event) => any;
+    version: number;
+    onversionchange: (ev: IDBVersionChangeEvent) => any;
+    close(): void;
+    createObjectStore(name: string, optionalParameters?: IDBObjectStoreParameters): IDBObjectStore;
+    deleteObjectStore(name: string): void;
+    transaction(storeNames: string | string[], mode?: IDBTransactionMode): IDBTransaction;
+    addEventListener(type: "versionchange", listener: (ev: IDBVersionChangeEvent) => any, useCapture?: boolean): void;
+    addEventListener<K extends keyof IDBDatabaseEventMap>(type: K, listener: (this: IDBDatabase, ev: IDBDatabaseEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var IDBDatabase: {
+    prototype: IDBDatabase;
+    new(): IDBDatabase;
+};
+
+interface IDBFactory {
+    cmp(first: any, second: any): number;
+    deleteDatabase(name: string): IDBOpenDBRequest;
+    open(name: string, version?: number): IDBOpenDBRequest;
+}
+
+declare var IDBFactory: {
+    prototype: IDBFactory;
+    new(): IDBFactory;
+};
+
+interface IDBIndex {
+    keyPath: string | string[];
+    readonly name: string;
+    readonly objectStore: IDBObjectStore;
+    readonly unique: boolean;
+    multiEntry: boolean;
+    count(key?: IDBKeyRange | IDBValidKey): IDBRequest;
+    get(key: IDBKeyRange | IDBValidKey): IDBRequest;
+    getKey(key: IDBKeyRange | IDBValidKey): IDBRequest;
+    openCursor(range?: IDBKeyRange | IDBValidKey, direction?: IDBCursorDirection): IDBRequest;
+    openKeyCursor(range?: IDBKeyRange | IDBValidKey, direction?: IDBCursorDirection): IDBRequest;
+}
+
+declare var IDBIndex: {
+    prototype: IDBIndex;
+    new(): IDBIndex;
+};
+
+interface IDBKeyRange {
+    readonly lower: any;
+    readonly lowerOpen: boolean;
+    readonly upper: any;
+    readonly upperOpen: boolean;
+}
+
+declare var IDBKeyRange: {
+    prototype: IDBKeyRange;
+    new(): IDBKeyRange;
+    bound(lower: any, upper: any, lowerOpen?: boolean, upperOpen?: boolean): IDBKeyRange;
+    lowerBound(lower: any, open?: boolean): IDBKeyRange;
+    only(value: any): IDBKeyRange;
+    upperBound(upper: any, open?: boolean): IDBKeyRange;
+};
+
+interface IDBObjectStore {
+    readonly indexNames: DOMStringList;
+    keyPath: string | string[];
+    readonly name: string;
+    readonly transaction: IDBTransaction;
+    autoIncrement: boolean;
+    add(value: any, key?: IDBKeyRange | IDBValidKey): IDBRequest;
+    clear(): IDBRequest;
+    count(key?: IDBKeyRange | IDBValidKey): IDBRequest;
+    createIndex(name: string, keyPath: string | string[], optionalParameters?: IDBIndexParameters): IDBIndex;
+    delete(key: IDBKeyRange | IDBValidKey): IDBRequest;
+    deleteIndex(indexName: string): void;
+    get(key: any): IDBRequest;
+    index(name: string): IDBIndex;
+    openCursor(range?: IDBKeyRange | IDBValidKey, direction?: IDBCursorDirection): IDBRequest;
+    put(value: any, key?: IDBKeyRange | IDBValidKey): IDBRequest;
+}
+
+declare var IDBObjectStore: {
+    prototype: IDBObjectStore;
+    new(): IDBObjectStore;
+};
+
+interface IDBOpenDBRequestEventMap extends IDBRequestEventMap {
+    "blocked": Event;
+    "upgradeneeded": IDBVersionChangeEvent;
+}
+
+interface IDBOpenDBRequest extends IDBRequest {
+    onblocked: (this: IDBOpenDBRequest, ev: Event) => any;
+    onupgradeneeded: (this: IDBOpenDBRequest, ev: IDBVersionChangeEvent) => any;
+    addEventListener<K extends keyof IDBOpenDBRequestEventMap>(type: K, listener: (this: IDBOpenDBRequest, ev: IDBOpenDBRequestEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var IDBOpenDBRequest: {
+    prototype: IDBOpenDBRequest;
+    new(): IDBOpenDBRequest;
+};
+
+interface IDBRequestEventMap {
+    "error": Event;
+    "success": Event;
+}
+
+interface IDBRequest extends EventTarget {
+    readonly error: DOMException;
+    onerror: (this: IDBRequest, ev: Event) => any;
+    onsuccess: (this: IDBRequest, ev: Event) => any;
+    readonly readyState: IDBRequestReadyState;
+    readonly result: any;
+    source: IDBObjectStore | IDBIndex | IDBCursor;
+    readonly transaction: IDBTransaction;
+    addEventListener<K extends keyof IDBRequestEventMap>(type: K, listener: (this: IDBRequest, ev: IDBRequestEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var IDBRequest: {
+    prototype: IDBRequest;
+    new(): IDBRequest;
+};
+
+interface IDBTransactionEventMap {
+    "abort": Event;
+    "complete": Event;
+    "error": Event;
+}
+
+interface IDBTransaction extends EventTarget {
+    readonly db: IDBDatabase;
+    readonly error: DOMException;
+    readonly mode: IDBTransactionMode;
+    onabort: (this: IDBTransaction, ev: Event) => any;
+    oncomplete: (this: IDBTransaction, ev: Event) => any;
+    onerror: (this: IDBTransaction, ev: Event) => any;
+    abort(): void;
+    objectStore(name: string): IDBObjectStore;
+    readonly READ_ONLY: string;
+    readonly READ_WRITE: string;
+    readonly VERSION_CHANGE: string;
+    addEventListener<K extends keyof IDBTransactionEventMap>(type: K, listener: (this: IDBTransaction, ev: IDBTransactionEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var IDBTransaction: {
+    prototype: IDBTransaction;
+    new(): IDBTransaction;
+    readonly READ_ONLY: string;
+    readonly READ_WRITE: string;
+    readonly VERSION_CHANGE: string;
+};
+
+interface IDBVersionChangeEvent extends Event {
+    readonly newVersion: number | null;
+    readonly oldVersion: number;
+}
+
+declare var IDBVersionChangeEvent: {
+    prototype: IDBVersionChangeEvent;
+    new(): IDBVersionChangeEvent;
+};
+
+interface IIRFilterNode extends AudioNode {
+    getFrequencyResponse(frequencyHz: Float32Array, magResponse: Float32Array, phaseResponse: Float32Array): void;
+}
+
+declare var IIRFilterNode: {
+    prototype: IIRFilterNode;
+    new(): IIRFilterNode;
+};
+
+interface ImageData {
+    data: Uint8ClampedArray;
+    readonly height: number;
+    readonly width: number;
+}
+
+declare var ImageData: {
+    prototype: ImageData;
+    new(width: number, height: number): ImageData;
+    new(array: Uint8ClampedArray, width: number, height: number): ImageData;
+};
+
+interface IntersectionObserver {
+    readonly root: Element | null;
+    readonly rootMargin: string;
+    readonly thresholds: number[];
+    disconnect(): void;
+    observe(target: Element): void;
+    takeRecords(): IntersectionObserverEntry[];
+    unobserve(target: Element): void;
+}
+
+declare var IntersectionObserver: {
+    prototype: IntersectionObserver;
+    new(callback: IntersectionObserverCallback, options?: IntersectionObserverInit): IntersectionObserver;
+};
+
+interface IntersectionObserverEntry {
+    readonly boundingClientRect: ClientRect;
+    readonly intersectionRatio: number;
+    readonly intersectionRect: ClientRect;
+    readonly rootBounds: ClientRect;
+    readonly target: Element;
+    readonly time: number;
+}
+
+declare var IntersectionObserverEntry: {
+    prototype: IntersectionObserverEntry;
+    new(intersectionObserverEntryInit: IntersectionObserverEntryInit): IntersectionObserverEntry;
+};
+
+interface KeyboardEvent extends UIEvent {
+    readonly altKey: boolean;
+    readonly char: string | null;
+    readonly charCode: number;
+    readonly ctrlKey: boolean;
+    readonly key: string;
+    readonly keyCode: number;
+    readonly locale: string;
+    readonly location: number;
+    readonly metaKey: boolean;
+    readonly repeat: boolean;
+    readonly shiftKey: boolean;
+    readonly which: number;
+    readonly code: string;
+    getModifierState(keyArg: string): boolean;
+    initKeyboardEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, keyArg: string, locationArg: number, modifiersListArg: string, repeat: boolean, locale: string): void;
+    readonly DOM_KEY_LOCATION_JOYSTICK: number;
+    readonly DOM_KEY_LOCATION_LEFT: number;
+    readonly DOM_KEY_LOCATION_MOBILE: number;
+    readonly DOM_KEY_LOCATION_NUMPAD: number;
+    readonly DOM_KEY_LOCATION_RIGHT: number;
+    readonly DOM_KEY_LOCATION_STANDARD: number;
+}
+
+declare var KeyboardEvent: {
+    prototype: KeyboardEvent;
+    new(typeArg: string, eventInitDict?: KeyboardEventInit): KeyboardEvent;
+    readonly DOM_KEY_LOCATION_JOYSTICK: number;
+    readonly DOM_KEY_LOCATION_LEFT: number;
+    readonly DOM_KEY_LOCATION_MOBILE: number;
+    readonly DOM_KEY_LOCATION_NUMPAD: number;
+    readonly DOM_KEY_LOCATION_RIGHT: number;
+    readonly DOM_KEY_LOCATION_STANDARD: number;
+};
+
+interface ListeningStateChangedEvent extends Event {
+    readonly label: string;
+    readonly state: ListeningState;
+}
+
+declare var ListeningStateChangedEvent: {
+    prototype: ListeningStateChangedEvent;
+    new(): ListeningStateChangedEvent;
+};
+
+interface Location {
+    hash: string;
+    host: string;
+    hostname: string;
+    href: string;
+    readonly origin: string;
+    pathname: string;
+    port: string;
+    protocol: string;
+    search: string;
+    assign(url: string): void;
+    reload(forcedReload?: boolean): void;
+    replace(url: string): void;
+    toString(): string;
+}
+
+declare var Location: {
+    prototype: Location;
+    new(): Location;
+};
+
+interface LongRunningScriptDetectedEvent extends Event {
+    readonly executionTime: number;
+    stopPageScriptExecution: boolean;
+}
+
+declare var LongRunningScriptDetectedEvent: {
+    prototype: LongRunningScriptDetectedEvent;
+    new(): LongRunningScriptDetectedEvent;
+};
+
+interface MediaDeviceInfo {
+    readonly deviceId: string;
+    readonly groupId: string;
+    readonly kind: MediaDeviceKind;
+    readonly label: string;
+}
+
+declare var MediaDeviceInfo: {
+    prototype: MediaDeviceInfo;
+    new(): MediaDeviceInfo;
+};
+
+interface MediaDevicesEventMap {
+    "devicechange": Event;
+}
+
+interface MediaDevices extends EventTarget {
+    ondevicechange: (this: MediaDevices, ev: Event) => any;
+    enumerateDevices(): any;
+    getSupportedConstraints(): MediaTrackSupportedConstraints;
+    getUserMedia(constraints: MediaStreamConstraints): Promise<MediaStream>;
+    addEventListener<K extends keyof MediaDevicesEventMap>(type: K, listener: (this: MediaDevices, ev: MediaDevicesEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MediaDevices: {
+    prototype: MediaDevices;
+    new(): MediaDevices;
+};
+
+interface MediaElementAudioSourceNode extends AudioNode {
+}
+
+declare var MediaElementAudioSourceNode: {
+    prototype: MediaElementAudioSourceNode;
+    new(): MediaElementAudioSourceNode;
+};
+
+interface MediaEncryptedEvent extends Event {
+    readonly initData: ArrayBuffer | null;
+    readonly initDataType: string;
+}
+
+declare var MediaEncryptedEvent: {
+    prototype: MediaEncryptedEvent;
+    new(type: string, eventInitDict?: MediaEncryptedEventInit): MediaEncryptedEvent;
+};
+
+interface MediaError {
+    readonly code: number;
+    readonly msExtendedCode: number;
+    readonly MEDIA_ERR_ABORTED: number;
+    readonly MEDIA_ERR_DECODE: number;
+    readonly MEDIA_ERR_NETWORK: number;
+    readonly MEDIA_ERR_SRC_NOT_SUPPORTED: number;
+    readonly MS_MEDIA_ERR_ENCRYPTED: number;
+}
+
+declare var MediaError: {
+    prototype: MediaError;
+    new(): MediaError;
+    readonly MEDIA_ERR_ABORTED: number;
+    readonly MEDIA_ERR_DECODE: number;
+    readonly MEDIA_ERR_NETWORK: number;
+    readonly MEDIA_ERR_SRC_NOT_SUPPORTED: number;
+    readonly MS_MEDIA_ERR_ENCRYPTED: number;
+};
+
+interface MediaKeyMessageEvent extends Event {
+    readonly message: ArrayBuffer;
+    readonly messageType: MediaKeyMessageType;
+}
+
+declare var MediaKeyMessageEvent: {
+    prototype: MediaKeyMessageEvent;
+    new(type: string, eventInitDict?: MediaKeyMessageEventInit): MediaKeyMessageEvent;
+};
+
+interface MediaKeys {
+    createSession(sessionType?: MediaKeySessionType): MediaKeySession;
+    setServerCertificate(serverCertificate: any): Promise<void>;
+}
+
+declare var MediaKeys: {
+    prototype: MediaKeys;
+    new(): MediaKeys;
+};
+
+interface MediaKeySession extends EventTarget {
+    readonly closed: Promise<void>;
+    readonly expiration: number;
+    readonly keyStatuses: MediaKeyStatusMap;
+    readonly sessionId: string;
+    close(): Promise<void>;
+    generateRequest(initDataType: string, initData: any): Promise<void>;
+    load(sessionId: string): Promise<boolean>;
+    remove(): Promise<void>;
+    update(response: any): Promise<void>;
+}
+
+declare var MediaKeySession: {
+    prototype: MediaKeySession;
+    new(): MediaKeySession;
+};
+
+interface MediaKeyStatusMap {
+    readonly size: number;
+    forEach(callback: ForEachCallback): void;
+    get(keyId: any): MediaKeyStatus;
+    has(keyId: any): boolean;
+}
+
+declare var MediaKeyStatusMap: {
+    prototype: MediaKeyStatusMap;
+    new(): MediaKeyStatusMap;
+};
+
+interface MediaKeySystemAccess {
+    readonly keySystem: string;
+    createMediaKeys(): Promise<MediaKeys>;
+    getConfiguration(): MediaKeySystemConfiguration;
+}
+
+declare var MediaKeySystemAccess: {
+    prototype: MediaKeySystemAccess;
+    new(): MediaKeySystemAccess;
+};
+
+interface MediaList {
+    readonly length: number;
+    mediaText: string;
+    appendMedium(newMedium: string): void;
+    deleteMedium(oldMedium: string): void;
+    item(index: number): string;
+    toString(): string;
+    [index: number]: string;
+}
+
+declare var MediaList: {
+    prototype: MediaList;
+    new(): MediaList;
+};
+
+interface MediaQueryList {
+    readonly matches: boolean;
+    readonly media: string;
+    addListener(listener: MediaQueryListListener): void;
+    removeListener(listener: MediaQueryListListener): void;
+}
+
+declare var MediaQueryList: {
+    prototype: MediaQueryList;
+    new(): MediaQueryList;
+};
+
+interface MediaSource extends EventTarget {
+    readonly activeSourceBuffers: SourceBufferList;
+    duration: number;
+    readonly readyState: string;
+    readonly sourceBuffers: SourceBufferList;
+    addSourceBuffer(type: string): SourceBuffer;
+    endOfStream(error?: number): void;
+    removeSourceBuffer(sourceBuffer: SourceBuffer): void;
+}
+
+declare var MediaSource: {
+    prototype: MediaSource;
+    new(): MediaSource;
+    isTypeSupported(type: string): boolean;
+};
+
+interface MediaStreamEventMap {
+    "active": Event;
+    "addtrack": MediaStreamTrackEvent;
+    "inactive": Event;
+    "removetrack": MediaStreamTrackEvent;
+}
+
+interface MediaStream extends EventTarget {
+    readonly active: boolean;
+    readonly id: string;
+    onactive: (this: MediaStream, ev: Event) => any;
+    onaddtrack: (this: MediaStream, ev: MediaStreamTrackEvent) => any;
+    oninactive: (this: MediaStream, ev: Event) => any;
+    onremovetrack: (this: MediaStream, ev: MediaStreamTrackEvent) => any;
+    addTrack(track: MediaStreamTrack): void;
+    clone(): MediaStream;
+    getAudioTracks(): MediaStreamTrack[];
+    getTrackById(trackId: string): MediaStreamTrack | null;
+    getTracks(): MediaStreamTrack[];
+    getVideoTracks(): MediaStreamTrack[];
+    removeTrack(track: MediaStreamTrack): void;
+    stop(): void;
+    addEventListener<K extends keyof MediaStreamEventMap>(type: K, listener: (this: MediaStream, ev: MediaStreamEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MediaStream: {
+    prototype: MediaStream;
+    new(streamOrTracks?: MediaStream | MediaStreamTrack[]): MediaStream;
+};
+
+interface MediaStreamAudioSourceNode extends AudioNode {
+}
+
+declare var MediaStreamAudioSourceNode: {
+    prototype: MediaStreamAudioSourceNode;
+    new(): MediaStreamAudioSourceNode;
+};
+
+interface MediaStreamError {
+    readonly constraintName: string | null;
+    readonly message: string | null;
+    readonly name: string;
+}
+
+declare var MediaStreamError: {
+    prototype: MediaStreamError;
+    new(): MediaStreamError;
+};
+
+interface MediaStreamErrorEvent extends Event {
+    readonly error: MediaStreamError | null;
+}
+
+declare var MediaStreamErrorEvent: {
+    prototype: MediaStreamErrorEvent;
+    new(typeArg: string, eventInitDict?: MediaStreamErrorEventInit): MediaStreamErrorEvent;
+};
+
+interface MediaStreamEvent extends Event {
+    readonly stream: MediaStream | null;
+}
+
+declare var MediaStreamEvent: {
+    prototype: MediaStreamEvent;
+    new(type: string, eventInitDict: MediaStreamEventInit): MediaStreamEvent;
+};
+
+interface MediaStreamTrackEventMap {
+    "ended": MediaStreamErrorEvent;
+    "mute": Event;
+    "overconstrained": MediaStreamErrorEvent;
+    "unmute": Event;
+}
+
+interface MediaStreamTrack extends EventTarget {
+    enabled: boolean;
+    readonly id: string;
+    readonly kind: string;
+    readonly label: string;
+    readonly muted: boolean;
+    onended: (this: MediaStreamTrack, ev: MediaStreamErrorEvent) => any;
+    onmute: (this: MediaStreamTrack, ev: Event) => any;
+    onoverconstrained: (this: MediaStreamTrack, ev: MediaStreamErrorEvent) => any;
+    onunmute: (this: MediaStreamTrack, ev: Event) => any;
+    readonly readonly: boolean;
+    readonly readyState: MediaStreamTrackState;
+    readonly remote: boolean;
+    applyConstraints(constraints: MediaTrackConstraints): Promise<void>;
+    clone(): MediaStreamTrack;
+    getCapabilities(): MediaTrackCapabilities;
+    getConstraints(): MediaTrackConstraints;
+    getSettings(): MediaTrackSettings;
+    stop(): void;
+    addEventListener<K extends keyof MediaStreamTrackEventMap>(type: K, listener: (this: MediaStreamTrack, ev: MediaStreamTrackEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MediaStreamTrack: {
+    prototype: MediaStreamTrack;
+    new(): MediaStreamTrack;
+};
+
+interface MediaStreamTrackEvent extends Event {
+    readonly track: MediaStreamTrack;
+}
+
+declare var MediaStreamTrackEvent: {
+    prototype: MediaStreamTrackEvent;
+    new(typeArg: string, eventInitDict?: MediaStreamTrackEventInit): MediaStreamTrackEvent;
+};
+
+interface MessageChannel {
+    readonly port1: MessagePort;
+    readonly port2: MessagePort;
+}
+
+declare var MessageChannel: {
+    prototype: MessageChannel;
+    new(): MessageChannel;
+};
+
+interface MessageEvent extends Event {
+    readonly data: any;
+    readonly origin: string;
+    readonly ports: any;
+    readonly source: Window;
+    initMessageEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, dataArg: any, originArg: string, lastEventIdArg: string, sourceArg: Window): void;
+}
+
+declare var MessageEvent: {
+    prototype: MessageEvent;
+    new(type: string, eventInitDict?: MessageEventInit): MessageEvent;
+};
+
+interface MessagePortEventMap {
+    "message": MessageEvent;
+}
+
+interface MessagePort extends EventTarget {
+    onmessage: (this: MessagePort, ev: MessageEvent) => any;
+    close(): void;
+    postMessage(message?: any, transfer?: any[]): void;
+    start(): void;
+    addEventListener<K extends keyof MessagePortEventMap>(type: K, listener: (this: MessagePort, ev: MessagePortEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MessagePort: {
+    prototype: MessagePort;
+    new(): MessagePort;
+};
+
+interface MimeType {
+    readonly description: string;
+    readonly enabledPlugin: Plugin;
+    readonly suffixes: string;
+    readonly type: string;
+}
+
+declare var MimeType: {
+    prototype: MimeType;
+    new(): MimeType;
+};
+
+interface MimeTypeArray {
+    readonly length: number;
+    item(index: number): Plugin;
+    namedItem(type: string): Plugin;
+    [index: number]: Plugin;
+}
+
+declare var MimeTypeArray: {
+    prototype: MimeTypeArray;
+    new(): MimeTypeArray;
+};
+
+interface MouseEvent extends UIEvent {
+    readonly altKey: boolean;
+    readonly button: number;
+    readonly buttons: number;
+    readonly clientX: number;
+    readonly clientY: number;
+    readonly ctrlKey: boolean;
+    readonly fromElement: Element;
+    readonly layerX: number;
+    readonly layerY: number;
+    readonly metaKey: boolean;
+    readonly movementX: number;
+    readonly movementY: number;
+    readonly offsetX: number;
+    readonly offsetY: number;
+    readonly pageX: number;
+    readonly pageY: number;
+    readonly relatedTarget: EventTarget;
+    readonly screenX: number;
+    readonly screenY: number;
+    readonly shiftKey: boolean;
+    readonly toElement: Element;
+    readonly which: number;
+    readonly x: number;
+    readonly y: number;
+    getModifierState(keyArg: string): boolean;
+    initMouseEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, ctrlKeyArg: boolean, altKeyArg: boolean, shiftKeyArg: boolean, metaKeyArg: boolean, buttonArg: number, relatedTargetArg: EventTarget | null): void;
+}
+
+declare var MouseEvent: {
+    prototype: MouseEvent;
+    new(typeArg: string, eventInitDict?: MouseEventInit): MouseEvent;
+};
+
+interface MSApp {
+    clearTemporaryWebDataAsync(): MSAppAsyncOperation;
+    createBlobFromRandomAccessStream(type: string, seeker: any): Blob;
+    createDataPackage(object: any): any;
+    createDataPackageFromSelection(): any;
+    createFileFromStorageFile(storageFile: any): File;
+    createStreamFromInputStream(type: string, inputStream: any): MSStream;
+    execAsyncAtPriority(asynchronousCallback: MSExecAtPriorityFunctionCallback, priority: string, ...args: any[]): void;
+    execAtPriority(synchronousCallback: MSExecAtPriorityFunctionCallback, priority: string, ...args: any[]): any;
+    getCurrentPriority(): string;
+    getHtmlPrintDocumentSourceAsync(htmlDoc: any): Promise<any>;
+    getViewId(view: any): any;
+    isTaskScheduledAtPriorityOrHigher(priority: string): boolean;
+    pageHandlesAllApplicationActivations(enabled: boolean): void;
+    suppressSubdownloadCredentialPrompts(suppress: boolean): void;
+    terminateApp(exceptionObject: any): void;
+    readonly CURRENT: string;
+    readonly HIGH: string;
+    readonly IDLE: string;
+    readonly NORMAL: string;
+}
+declare var MSApp: MSApp;
+
+interface MSAppAsyncOperationEventMap {
+    "complete": Event;
+    "error": Event;
+}
+
+interface MSAppAsyncOperation extends EventTarget {
+    readonly error: DOMError;
+    oncomplete: (this: MSAppAsyncOperation, ev: Event) => any;
+    onerror: (this: MSAppAsyncOperation, ev: Event) => any;
+    readonly readyState: number;
+    readonly result: any;
+    start(): void;
+    readonly COMPLETED: number;
+    readonly ERROR: number;
+    readonly STARTED: number;
+    addEventListener<K extends keyof MSAppAsyncOperationEventMap>(type: K, listener: (this: MSAppAsyncOperation, ev: MSAppAsyncOperationEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MSAppAsyncOperation: {
+    prototype: MSAppAsyncOperation;
+    new(): MSAppAsyncOperation;
+    readonly COMPLETED: number;
+    readonly ERROR: number;
+    readonly STARTED: number;
+};
+
+interface MSAssertion {
+    readonly id: string;
+    readonly type: MSCredentialType;
+}
+
+declare var MSAssertion: {
+    prototype: MSAssertion;
+    new(): MSAssertion;
+};
+
+interface MSBlobBuilder {
+    append(data: any, endings?: string): void;
+    getBlob(contentType?: string): Blob;
+}
+
+declare var MSBlobBuilder: {
+    prototype: MSBlobBuilder;
+    new(): MSBlobBuilder;
+};
+
+interface MSCredentials {
+    getAssertion(challenge: string, filter?: MSCredentialFilter, params?: MSSignatureParameters): Promise<MSAssertion>;
+    makeCredential(accountInfo: MSAccountInfo, params: MSCredentialParameters[], challenge?: string): Promise<MSAssertion>;
+}
+
+declare var MSCredentials: {
+    prototype: MSCredentials;
+    new(): MSCredentials;
+};
+
+interface MSFIDOCredentialAssertion extends MSAssertion {
+    readonly algorithm: string | Algorithm;
+    readonly attestation: any;
+    readonly publicKey: string;
+    readonly transportHints: MSTransportType[];
+}
+
+declare var MSFIDOCredentialAssertion: {
+    prototype: MSFIDOCredentialAssertion;
+    new(): MSFIDOCredentialAssertion;
+};
+
+interface MSFIDOSignature {
+    readonly authnrData: string;
+    readonly clientData: string;
+    readonly signature: string;
+}
+
+declare var MSFIDOSignature: {
+    prototype: MSFIDOSignature;
+    new(): MSFIDOSignature;
+};
+
+interface MSFIDOSignatureAssertion extends MSAssertion {
+    readonly signature: MSFIDOSignature;
+}
+
+declare var MSFIDOSignatureAssertion: {
+    prototype: MSFIDOSignatureAssertion;
+    new(): MSFIDOSignatureAssertion;
+};
+
+interface MSGesture {
+    target: Element;
+    addPointer(pointerId: number): void;
+    stop(): void;
+}
+
+declare var MSGesture: {
+    prototype: MSGesture;
+    new(): MSGesture;
+};
+
+interface MSGestureEvent extends UIEvent {
+    readonly clientX: number;
+    readonly clientY: number;
+    readonly expansion: number;
+    readonly gestureObject: any;
+    readonly hwTimestamp: number;
+    readonly offsetX: number;
+    readonly offsetY: number;
+    readonly rotation: number;
+    readonly scale: number;
+    readonly screenX: number;
+    readonly screenY: number;
+    readonly translationX: number;
+    readonly translationY: number;
+    readonly velocityAngular: number;
+    readonly velocityExpansion: number;
+    readonly velocityX: number;
+    readonly velocityY: number;
+    initGestureEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, offsetXArg: number, offsetYArg: number, translationXArg: number, translationYArg: number, scaleArg: number, expansionArg: number, rotationArg: number, velocityXArg: number, velocityYArg: number, velocityExpansionArg: number, velocityAngularArg: number, hwTimestampArg: number): void;
+    readonly MSGESTURE_FLAG_BEGIN: number;
+    readonly MSGESTURE_FLAG_CANCEL: number;
+    readonly MSGESTURE_FLAG_END: number;
+    readonly MSGESTURE_FLAG_INERTIA: number;
+    readonly MSGESTURE_FLAG_NONE: number;
+}
+
+declare var MSGestureEvent: {
+    prototype: MSGestureEvent;
+    new(): MSGestureEvent;
+    readonly MSGESTURE_FLAG_BEGIN: number;
+    readonly MSGESTURE_FLAG_CANCEL: number;
+    readonly MSGESTURE_FLAG_END: number;
+    readonly MSGESTURE_FLAG_INERTIA: number;
+    readonly MSGESTURE_FLAG_NONE: number;
+};
+
+interface MSGraphicsTrust {
+    readonly constrictionActive: boolean;
+    readonly status: string;
+}
+
+declare var MSGraphicsTrust: {
+    prototype: MSGraphicsTrust;
+    new(): MSGraphicsTrust;
+};
+
+interface MSHTMLWebViewElement extends HTMLElement {
+    readonly canGoBack: boolean;
+    readonly canGoForward: boolean;
+    readonly containsFullScreenElement: boolean;
+    readonly documentTitle: string;
+    height: number;
+    readonly settings: MSWebViewSettings;
+    src: string;
+    width: number;
+    addWebAllowedObject(name: string, applicationObject: any): void;
+    buildLocalStreamUri(contentIdentifier: string, relativePath: string): string;
+    capturePreviewToBlobAsync(): MSWebViewAsyncOperation;
+    captureSelectedContentToDataPackageAsync(): MSWebViewAsyncOperation;
+    getDeferredPermissionRequestById(id: number): DeferredPermissionRequest;
+    getDeferredPermissionRequests(): DeferredPermissionRequest[];
+    goBack(): void;
+    goForward(): void;
+    invokeScriptAsync(scriptName: string, ...args: any[]): MSWebViewAsyncOperation;
+    navigate(uri: string): void;
+    navigateFocus(navigationReason: NavigationReason, origin: FocusNavigationOrigin): void;
+    navigateToLocalStreamUri(source: string, streamResolver: any): void;
+    navigateToString(contents: string): void;
+    navigateWithHttpRequestMessage(requestMessage: any): void;
+    refresh(): void;
+    stop(): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: MSHTMLWebViewElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MSHTMLWebViewElement: {
+    prototype: MSHTMLWebViewElement;
+    new(): MSHTMLWebViewElement;
+};
+
+interface MSInputMethodContextEventMap {
+    "MSCandidateWindowHide": Event;
+    "MSCandidateWindowShow": Event;
+    "MSCandidateWindowUpdate": Event;
+}
+
+interface MSInputMethodContext extends EventTarget {
+    readonly compositionEndOffset: number;
+    readonly compositionStartOffset: number;
+    oncandidatewindowhide: (this: MSInputMethodContext, ev: Event) => any;
+    oncandidatewindowshow: (this: MSInputMethodContext, ev: Event) => any;
+    oncandidatewindowupdate: (this: MSInputMethodContext, ev: Event) => any;
+    readonly target: HTMLElement;
+    getCandidateWindowClientRect(): ClientRect;
+    getCompositionAlternatives(): string[];
+    hasComposition(): boolean;
+    isCandidateWindowVisible(): boolean;
+    addEventListener<K extends keyof MSInputMethodContextEventMap>(type: K, listener: (this: MSInputMethodContext, ev: MSInputMethodContextEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MSInputMethodContext: {
+    prototype: MSInputMethodContext;
+    new(): MSInputMethodContext;
+};
+
+interface MSManipulationEvent extends UIEvent {
+    readonly currentState: number;
+    readonly inertiaDestinationX: number;
+    readonly inertiaDestinationY: number;
+    readonly lastState: number;
+    initMSManipulationEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, lastState: number, currentState: number): void;
+    readonly MS_MANIPULATION_STATE_ACTIVE: number;
+    readonly MS_MANIPULATION_STATE_CANCELLED: number;
+    readonly MS_MANIPULATION_STATE_COMMITTED: number;
+    readonly MS_MANIPULATION_STATE_DRAGGING: number;
+    readonly MS_MANIPULATION_STATE_INERTIA: number;
+    readonly MS_MANIPULATION_STATE_PRESELECT: number;
+    readonly MS_MANIPULATION_STATE_SELECTING: number;
+    readonly MS_MANIPULATION_STATE_STOPPED: number;
+}
+
+declare var MSManipulationEvent: {
+    prototype: MSManipulationEvent;
+    new(): MSManipulationEvent;
+    readonly MS_MANIPULATION_STATE_ACTIVE: number;
+    readonly MS_MANIPULATION_STATE_CANCELLED: number;
+    readonly MS_MANIPULATION_STATE_COMMITTED: number;
+    readonly MS_MANIPULATION_STATE_DRAGGING: number;
+    readonly MS_MANIPULATION_STATE_INERTIA: number;
+    readonly MS_MANIPULATION_STATE_PRESELECT: number;
+    readonly MS_MANIPULATION_STATE_SELECTING: number;
+    readonly MS_MANIPULATION_STATE_STOPPED: number;
+};
+
+interface MSMediaKeyError {
+    readonly code: number;
+    readonly systemCode: number;
+    readonly MS_MEDIA_KEYERR_CLIENT: number;
+    readonly MS_MEDIA_KEYERR_DOMAIN: number;
+    readonly MS_MEDIA_KEYERR_HARDWARECHANGE: number;
+    readonly MS_MEDIA_KEYERR_OUTPUT: number;
+    readonly MS_MEDIA_KEYERR_SERVICE: number;
+    readonly MS_MEDIA_KEYERR_UNKNOWN: number;
+}
+
+declare var MSMediaKeyError: {
+    prototype: MSMediaKeyError;
+    new(): MSMediaKeyError;
+    readonly MS_MEDIA_KEYERR_CLIENT: number;
+    readonly MS_MEDIA_KEYERR_DOMAIN: number;
+    readonly MS_MEDIA_KEYERR_HARDWARECHANGE: number;
+    readonly MS_MEDIA_KEYERR_OUTPUT: number;
+    readonly MS_MEDIA_KEYERR_SERVICE: number;
+    readonly MS_MEDIA_KEYERR_UNKNOWN: number;
+};
+
+interface MSMediaKeyMessageEvent extends Event {
+    readonly destinationURL: string | null;
+    readonly message: Uint8Array;
+}
+
+declare var MSMediaKeyMessageEvent: {
+    prototype: MSMediaKeyMessageEvent;
+    new(): MSMediaKeyMessageEvent;
+};
+
+interface MSMediaKeyNeededEvent extends Event {
+    readonly initData: Uint8Array | null;
+}
+
+declare var MSMediaKeyNeededEvent: {
+    prototype: MSMediaKeyNeededEvent;
+    new(): MSMediaKeyNeededEvent;
+};
+
+interface MSMediaKeys {
+    readonly keySystem: string;
+    createSession(type: string, initData: Uint8Array, cdmData?: Uint8Array): MSMediaKeySession;
+}
+
+declare var MSMediaKeys: {
+    prototype: MSMediaKeys;
+    new(keySystem: string): MSMediaKeys;
+    isTypeSupported(keySystem: string, type?: string): boolean;
+    isTypeSupportedWithFeatures(keySystem: string, type?: string): string;
+};
+
+interface MSMediaKeySession extends EventTarget {
+    readonly error: MSMediaKeyError | null;
+    readonly keySystem: string;
+    readonly sessionId: string;
+    close(): void;
+    update(key: Uint8Array): void;
+}
+
+declare var MSMediaKeySession: {
+    prototype: MSMediaKeySession;
+    new(): MSMediaKeySession;
+};
+
+interface MSPointerEvent extends MouseEvent {
+    readonly currentPoint: any;
+    readonly height: number;
+    readonly hwTimestamp: number;
+    readonly intermediatePoints: any;
+    readonly isPrimary: boolean;
+    readonly pointerId: number;
+    readonly pointerType: any;
+    readonly pressure: number;
+    readonly rotation: number;
+    readonly tiltX: number;
+    readonly tiltY: number;
+    readonly width: number;
+    getCurrentPoint(element: Element): void;
+    getIntermediatePoints(element: Element): void;
+    initPointerEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, ctrlKeyArg: boolean, altKeyArg: boolean, shiftKeyArg: boolean, metaKeyArg: boolean, buttonArg: number, relatedTargetArg: EventTarget, offsetXArg: number, offsetYArg: number, widthArg: number, heightArg: number, pressure: number, rotation: number, tiltX: number, tiltY: number, pointerIdArg: number, pointerType: any, hwTimestampArg: number, isPrimary: boolean): void;
+}
+
+declare var MSPointerEvent: {
+    prototype: MSPointerEvent;
+    new(typeArg: string, eventInitDict?: PointerEventInit): MSPointerEvent;
+};
+
+interface MSRangeCollection {
+    readonly length: number;
+    item(index: number): Range;
+    [index: number]: Range;
+}
+
+declare var MSRangeCollection: {
+    prototype: MSRangeCollection;
+    new(): MSRangeCollection;
+};
+
+interface MSSiteModeEvent extends Event {
+    readonly actionURL: string;
+    readonly buttonID: number;
+}
+
+declare var MSSiteModeEvent: {
+    prototype: MSSiteModeEvent;
+    new(): MSSiteModeEvent;
+};
+
+interface MSStream {
+    readonly type: string;
+    msClose(): void;
+    msDetachStream(): any;
+}
+
+declare var MSStream: {
+    prototype: MSStream;
+    new(): MSStream;
+};
+
+interface MSStreamReader extends EventTarget, MSBaseReader {
+    readonly error: DOMError;
+    readAsArrayBuffer(stream: MSStream, size?: number): void;
+    readAsBinaryString(stream: MSStream, size?: number): void;
+    readAsBlob(stream: MSStream, size?: number): void;
+    readAsDataURL(stream: MSStream, size?: number): void;
+    readAsText(stream: MSStream, encoding?: string, size?: number): void;
+    addEventListener<K extends keyof MSBaseReaderEventMap>(type: K, listener: (this: MSStreamReader, ev: MSBaseReaderEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MSStreamReader: {
+    prototype: MSStreamReader;
+    new(): MSStreamReader;
+};
+
+interface MSWebViewAsyncOperationEventMap {
+    "complete": Event;
+    "error": Event;
+}
+
+interface MSWebViewAsyncOperation extends EventTarget {
+    readonly error: DOMError;
+    oncomplete: (this: MSWebViewAsyncOperation, ev: Event) => any;
+    onerror: (this: MSWebViewAsyncOperation, ev: Event) => any;
+    readonly readyState: number;
+    readonly result: any;
+    readonly target: MSHTMLWebViewElement;
+    readonly type: number;
+    start(): void;
+    readonly COMPLETED: number;
+    readonly ERROR: number;
+    readonly STARTED: number;
+    readonly TYPE_CAPTURE_PREVIEW_TO_RANDOM_ACCESS_STREAM: number;
+    readonly TYPE_CREATE_DATA_PACKAGE_FROM_SELECTION: number;
+    readonly TYPE_INVOKE_SCRIPT: number;
+    addEventListener<K extends keyof MSWebViewAsyncOperationEventMap>(type: K, listener: (this: MSWebViewAsyncOperation, ev: MSWebViewAsyncOperationEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MSWebViewAsyncOperation: {
+    prototype: MSWebViewAsyncOperation;
+    new(): MSWebViewAsyncOperation;
+    readonly COMPLETED: number;
+    readonly ERROR: number;
+    readonly STARTED: number;
+    readonly TYPE_CAPTURE_PREVIEW_TO_RANDOM_ACCESS_STREAM: number;
+    readonly TYPE_CREATE_DATA_PACKAGE_FROM_SELECTION: number;
+    readonly TYPE_INVOKE_SCRIPT: number;
+};
+
+interface MSWebViewSettings {
+    isIndexedDBEnabled: boolean;
+    isJavaScriptEnabled: boolean;
+}
+
+declare var MSWebViewSettings: {
+    prototype: MSWebViewSettings;
+    new(): MSWebViewSettings;
+};
+
+interface MutationEvent extends Event {
+    readonly attrChange: number;
+    readonly attrName: string;
+    readonly newValue: string;
+    readonly prevValue: string;
+    readonly relatedNode: Node;
+    initMutationEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, relatedNodeArg: Node, prevValueArg: string, newValueArg: string, attrNameArg: string, attrChangeArg: number): void;
+    readonly ADDITION: number;
+    readonly MODIFICATION: number;
+    readonly REMOVAL: number;
+}
+
+declare var MutationEvent: {
+    prototype: MutationEvent;
+    new(): MutationEvent;
+    readonly ADDITION: number;
+    readonly MODIFICATION: number;
+    readonly REMOVAL: number;
+};
+
+interface MutationObserver {
+    disconnect(): void;
+    observe(target: Node, options: MutationObserverInit): void;
+    takeRecords(): MutationRecord[];
+}
+
+declare var MutationObserver: {
+    prototype: MutationObserver;
+    new(callback: MutationCallback): MutationObserver;
+};
+
+interface MutationRecord {
+    readonly addedNodes: NodeList;
+    readonly attributeName: string | null;
+    readonly attributeNamespace: string | null;
+    readonly nextSibling: Node | null;
+    readonly oldValue: string | null;
+    readonly previousSibling: Node | null;
+    readonly removedNodes: NodeList;
+    readonly target: Node;
+    readonly type: string;
+}
+
+declare var MutationRecord: {
+    prototype: MutationRecord;
+    new(): MutationRecord;
+};
+
+interface NamedNodeMap {
+    readonly length: number;
+    getNamedItem(name: string): Attr;
+    getNamedItemNS(namespaceURI: string | null, localName: string | null): Attr;
+    item(index: number): Attr;
+    removeNamedItem(name: string): Attr;
+    removeNamedItemNS(namespaceURI: string | null, localName: string | null): Attr;
+    setNamedItem(arg: Attr): Attr;
+    setNamedItemNS(arg: Attr): Attr;
+    [index: number]: Attr;
+}
+
+declare var NamedNodeMap: {
+    prototype: NamedNodeMap;
+    new(): NamedNodeMap;
+};
+
+interface NavigationCompletedEvent extends NavigationEvent {
+    readonly isSuccess: boolean;
+    readonly webErrorStatus: number;
+}
+
+declare var NavigationCompletedEvent: {
+    prototype: NavigationCompletedEvent;
+    new(): NavigationCompletedEvent;
+};
+
+interface NavigationEvent extends Event {
+    readonly uri: string;
+}
+
+declare var NavigationEvent: {
+    prototype: NavigationEvent;
+    new(): NavigationEvent;
+};
+
+interface NavigationEventWithReferrer extends NavigationEvent {
+    readonly referer: string;
+}
+
+declare var NavigationEventWithReferrer: {
+    prototype: NavigationEventWithReferrer;
+    new(): NavigationEventWithReferrer;
+};
+
+interface Navigator extends Object, NavigatorID, NavigatorOnLine, NavigatorContentUtils, NavigatorStorageUtils, NavigatorGeolocation, MSNavigatorDoNotTrack, MSFileSaver, NavigatorBeacon, NavigatorConcurrentHardware, NavigatorUserMedia {
+    readonly authentication: WebAuthentication;
+    readonly cookieEnabled: boolean;
+    gamepadInputEmulation: GamepadInputEmulationType;
+    readonly language: string;
+    readonly maxTouchPoints: number;
+    readonly mimeTypes: MimeTypeArray;
+    readonly msManipulationViewsEnabled: boolean;
+    readonly msMaxTouchPoints: number;
+    readonly msPointerEnabled: boolean;
+    readonly plugins: PluginArray;
+    readonly pointerEnabled: boolean;
+    readonly serviceWorker: ServiceWorkerContainer;
+    readonly webdriver: boolean;
+    readonly hardwareConcurrency: number;
+    readonly languages: string[];
+    getGamepads(): Gamepad[];
+    javaEnabled(): boolean;
+    msLaunchUri(uri: string, successCallback?: MSLaunchUriCallback, noHandlerCallback?: MSLaunchUriCallback): void;
+    requestMediaKeySystemAccess(keySystem: string, supportedConfigurations: MediaKeySystemConfiguration[]): Promise<MediaKeySystemAccess>;
+    vibrate(pattern: number | number[]): boolean;
+}
+
+declare var Navigator: {
+    prototype: Navigator;
+    new(): Navigator;
+};
+
+interface Node extends EventTarget {
+    readonly attributes: NamedNodeMap;
+    readonly baseURI: string | null;
+    readonly childNodes: NodeList;
+    readonly firstChild: Node | null;
+    readonly lastChild: Node | null;
+    readonly localName: string | null;
+    readonly namespaceURI: string | null;
+    readonly nextSibling: Node | null;
+    readonly nodeName: string;
+    readonly nodeType: number;
+    nodeValue: string | null;
+    readonly ownerDocument: Document;
+    readonly parentElement: HTMLElement | null;
+    readonly parentNode: Node | null;
+    readonly previousSibling: Node | null;
+    textContent: string | null;
+    appendChild<T extends Node>(newChild: T): T;
+    cloneNode(deep?: boolean): Node;
+    compareDocumentPosition(other: Node): number;
+    contains(child: Node): boolean;
+    hasAttributes(): boolean;
+    hasChildNodes(): boolean;
+    insertBefore<T extends Node>(newChild: T, refChild: Node | null): T;
+    isDefaultNamespace(namespaceURI: string | null): boolean;
+    isEqualNode(arg: Node): boolean;
+    isSameNode(other: Node): boolean;
+    lookupNamespaceURI(prefix: string | null): string | null;
+    lookupPrefix(namespaceURI: string | null): string | null;
+    normalize(): void;
+    removeChild<T extends Node>(oldChild: T): T;
+    replaceChild<T extends Node>(newChild: Node, oldChild: T): T;
+    readonly ATTRIBUTE_NODE: number;
+    readonly CDATA_SECTION_NODE: number;
+    readonly COMMENT_NODE: number;
+    readonly DOCUMENT_FRAGMENT_NODE: number;
+    readonly DOCUMENT_NODE: number;
+    readonly DOCUMENT_POSITION_CONTAINED_BY: number;
+    readonly DOCUMENT_POSITION_CONTAINS: number;
+    readonly DOCUMENT_POSITION_DISCONNECTED: number;
+    readonly DOCUMENT_POSITION_FOLLOWING: number;
+    readonly DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC: number;
+    readonly DOCUMENT_POSITION_PRECEDING: number;
+    readonly DOCUMENT_TYPE_NODE: number;
+    readonly ELEMENT_NODE: number;
+    readonly ENTITY_NODE: number;
+    readonly ENTITY_REFERENCE_NODE: number;
+    readonly NOTATION_NODE: number;
+    readonly PROCESSING_INSTRUCTION_NODE: number;
+    readonly TEXT_NODE: number;
+}
+
+declare var Node: {
+    prototype: Node;
+    new(): Node;
+    readonly ATTRIBUTE_NODE: number;
+    readonly CDATA_SECTION_NODE: number;
+    readonly COMMENT_NODE: number;
+    readonly DOCUMENT_FRAGMENT_NODE: number;
+    readonly DOCUMENT_NODE: number;
+    readonly DOCUMENT_POSITION_CONTAINED_BY: number;
+    readonly DOCUMENT_POSITION_CONTAINS: number;
+    readonly DOCUMENT_POSITION_DISCONNECTED: number;
+    readonly DOCUMENT_POSITION_FOLLOWING: number;
+    readonly DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC: number;
+    readonly DOCUMENT_POSITION_PRECEDING: number;
+    readonly DOCUMENT_TYPE_NODE: number;
+    readonly ELEMENT_NODE: number;
+    readonly ENTITY_NODE: number;
+    readonly ENTITY_REFERENCE_NODE: number;
+    readonly NOTATION_NODE: number;
+    readonly PROCESSING_INSTRUCTION_NODE: number;
+    readonly TEXT_NODE: number;
+};
+
+interface NodeFilter {
+    acceptNode(n: Node): number;
+}
+
+declare var NodeFilter: {
+    readonly FILTER_ACCEPT: number;
+    readonly FILTER_REJECT: number;
+    readonly FILTER_SKIP: number;
+    readonly SHOW_ALL: number;
+    readonly SHOW_ATTRIBUTE: number;
+    readonly SHOW_CDATA_SECTION: number;
+    readonly SHOW_COMMENT: number;
+    readonly SHOW_DOCUMENT: number;
+    readonly SHOW_DOCUMENT_FRAGMENT: number;
+    readonly SHOW_DOCUMENT_TYPE: number;
+    readonly SHOW_ELEMENT: number;
+    readonly SHOW_ENTITY: number;
+    readonly SHOW_ENTITY_REFERENCE: number;
+    readonly SHOW_NOTATION: number;
+    readonly SHOW_PROCESSING_INSTRUCTION: number;
+    readonly SHOW_TEXT: number;
+};
+
+interface NodeIterator {
+    readonly expandEntityReferences: boolean;
+    readonly filter: NodeFilter;
+    readonly root: Node;
+    readonly whatToShow: number;
+    detach(): void;
+    nextNode(): Node;
+    previousNode(): Node;
+}
+
+declare var NodeIterator: {
+    prototype: NodeIterator;
+    new(): NodeIterator;
+};
+
+interface NodeList {
+    readonly length: number;
+    item(index: number): Node;
+    [index: number]: Node;
+}
+
+declare var NodeList: {
+    prototype: NodeList;
+    new(): NodeList;
+};
+
+interface NotificationEventMap {
+    "click": Event;
+    "close": Event;
+    "error": Event;
+    "show": Event;
+}
+
+interface Notification extends EventTarget {
+    readonly body: string;
+    readonly dir: NotificationDirection;
+    readonly icon: string;
+    readonly lang: string;
+    onclick: (this: Notification, ev: Event) => any;
+    onclose: (this: Notification, ev: Event) => any;
+    onerror: (this: Notification, ev: Event) => any;
+    onshow: (this: Notification, ev: Event) => any;
+    readonly permission: NotificationPermission;
+    readonly tag: string;
+    readonly title: string;
+    close(): void;
+    addEventListener<K extends keyof NotificationEventMap>(type: K, listener: (this: Notification, ev: NotificationEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var Notification: {
+    prototype: Notification;
+    new(title: string, options?: NotificationOptions): Notification;
+    requestPermission(callback?: NotificationPermissionCallback): Promise<NotificationPermission>;
+};
+
+interface OES_element_index_uint {
+}
+
+declare var OES_element_index_uint: {
+    prototype: OES_element_index_uint;
+    new(): OES_element_index_uint;
+};
+
+interface OES_standard_derivatives {
+    readonly FRAGMENT_SHADER_DERIVATIVE_HINT_OES: number;
+}
+
+declare var OES_standard_derivatives: {
+    prototype: OES_standard_derivatives;
+    new(): OES_standard_derivatives;
+    readonly FRAGMENT_SHADER_DERIVATIVE_HINT_OES: number;
+};
+
+interface OES_texture_float {
+}
+
+declare var OES_texture_float: {
+    prototype: OES_texture_float;
+    new(): OES_texture_float;
+};
+
+interface OES_texture_float_linear {
+}
+
+declare var OES_texture_float_linear: {
+    prototype: OES_texture_float_linear;
+    new(): OES_texture_float_linear;
+};
+
+interface OES_texture_half_float {
+    readonly HALF_FLOAT_OES: number;
+}
+
+declare var OES_texture_half_float: {
+    prototype: OES_texture_half_float;
+    new(): OES_texture_half_float;
+    readonly HALF_FLOAT_OES: number;
+};
+
+interface OES_texture_half_float_linear {
+}
+
+declare var OES_texture_half_float_linear: {
+    prototype: OES_texture_half_float_linear;
+    new(): OES_texture_half_float_linear;
+};
+
+interface OfflineAudioCompletionEvent extends Event {
+    readonly renderedBuffer: AudioBuffer;
+}
+
+declare var OfflineAudioCompletionEvent: {
+    prototype: OfflineAudioCompletionEvent;
+    new(): OfflineAudioCompletionEvent;
+};
+
+interface OfflineAudioContextEventMap extends AudioContextEventMap {
+    "complete": OfflineAudioCompletionEvent;
+}
+
+interface OfflineAudioContext extends AudioContextBase {
+    readonly length: number;
+    oncomplete: (this: OfflineAudioContext, ev: OfflineAudioCompletionEvent) => any;
+    startRendering(): Promise<AudioBuffer>;
+    suspend(suspendTime: number): Promise<void>;
+    addEventListener<K extends keyof OfflineAudioContextEventMap>(type: K, listener: (this: OfflineAudioContext, ev: OfflineAudioContextEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var OfflineAudioContext: {
+    prototype: OfflineAudioContext;
+    new(numberOfChannels: number, length: number, sampleRate: number): OfflineAudioContext;
+};
+
+interface OscillatorNodeEventMap {
+    "ended": MediaStreamErrorEvent;
+}
+
+interface OscillatorNode extends AudioNode {
+    readonly detune: AudioParam;
+    readonly frequency: AudioParam;
+    onended: (this: OscillatorNode, ev: MediaStreamErrorEvent) => any;
+    type: OscillatorType;
+    setPeriodicWave(periodicWave: PeriodicWave): void;
+    start(when?: number): void;
+    stop(when?: number): void;
+    addEventListener<K extends keyof OscillatorNodeEventMap>(type: K, listener: (this: OscillatorNode, ev: OscillatorNodeEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var OscillatorNode: {
+    prototype: OscillatorNode;
+    new(): OscillatorNode;
+};
+
+interface OverflowEvent extends UIEvent {
+    readonly horizontalOverflow: boolean;
+    readonly orient: number;
+    readonly verticalOverflow: boolean;
+    readonly BOTH: number;
+    readonly HORIZONTAL: number;
+    readonly VERTICAL: number;
+}
+
+declare var OverflowEvent: {
+    prototype: OverflowEvent;
+    new(): OverflowEvent;
+    readonly BOTH: number;
+    readonly HORIZONTAL: number;
+    readonly VERTICAL: number;
+};
+
+interface PageTransitionEvent extends Event {
+    readonly persisted: boolean;
+}
+
+declare var PageTransitionEvent: {
+    prototype: PageTransitionEvent;
+    new(): PageTransitionEvent;
+};
+
+interface PannerNode extends AudioNode {
+    coneInnerAngle: number;
+    coneOuterAngle: number;
+    coneOuterGain: number;
+    distanceModel: DistanceModelType;
+    maxDistance: number;
+    panningModel: PanningModelType;
+    refDistance: number;
+    rolloffFactor: number;
+    setOrientation(x: number, y: number, z: number): void;
+    setPosition(x: number, y: number, z: number): void;
+    setVelocity(x: number, y: number, z: number): void;
+}
+
+declare var PannerNode: {
+    prototype: PannerNode;
+    new(): PannerNode;
+};
+
+interface Path2D extends Object, CanvasPathMethods {
+}
+
+declare var Path2D: {
+    prototype: Path2D;
+    new(path?: Path2D): Path2D;
+};
+
+interface PaymentAddress {
+    readonly addressLine: string[];
+    readonly city: string;
+    readonly country: string;
+    readonly dependentLocality: string;
+    readonly languageCode: string;
+    readonly organization: string;
+    readonly phone: string;
+    readonly postalCode: string;
+    readonly recipient: string;
+    readonly region: string;
+    readonly sortingCode: string;
+    toJSON(): any;
+}
+
+declare var PaymentAddress: {
+    prototype: PaymentAddress;
+    new(): PaymentAddress;
+};
+
+interface PaymentRequestEventMap {
+    "shippingaddresschange": Event;
+    "shippingoptionchange": Event;
+}
+
+interface PaymentRequest extends EventTarget {
+    onshippingaddresschange: (this: PaymentRequest, ev: Event) => any;
+    onshippingoptionchange: (this: PaymentRequest, ev: Event) => any;
+    readonly shippingAddress: PaymentAddress | null;
+    readonly shippingOption: string | null;
+    readonly shippingType: PaymentShippingType | null;
+    abort(): Promise<void>;
+    show(): Promise<PaymentResponse>;
+    addEventListener<K extends keyof PaymentRequestEventMap>(type: K, listener: (this: PaymentRequest, ev: PaymentRequestEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var PaymentRequest: {
+    prototype: PaymentRequest;
+    new(methodData: PaymentMethodData[], details: PaymentDetails, options?: PaymentOptions): PaymentRequest;
+};
+
+interface PaymentRequestUpdateEvent extends Event {
+    updateWith(d: Promise<PaymentDetails>): void;
+}
+
+declare var PaymentRequestUpdateEvent: {
+    prototype: PaymentRequestUpdateEvent;
+    new(type: string, eventInitDict?: PaymentRequestUpdateEventInit): PaymentRequestUpdateEvent;
+};
+
+interface PaymentResponse {
+    readonly details: any;
+    readonly methodName: string;
+    readonly payerEmail: string | null;
+    readonly payerName: string | null;
+    readonly payerPhone: string | null;
+    readonly shippingAddress: PaymentAddress | null;
+    readonly shippingOption: string | null;
+    complete(result?: PaymentComplete): Promise<void>;
+    toJSON(): any;
+}
+
+declare var PaymentResponse: {
+    prototype: PaymentResponse;
+    new(): PaymentResponse;
+};
+
+interface Performance {
+    readonly navigation: PerformanceNavigation;
+    readonly timing: PerformanceTiming;
+    clearMarks(markName?: string): void;
+    clearMeasures(measureName?: string): void;
+    clearResourceTimings(): void;
+    getEntries(): any;
+    getEntriesByName(name: string, entryType?: string): any;
+    getEntriesByType(entryType: string): any;
+    getMarks(markName?: string): any;
+    getMeasures(measureName?: string): any;
+    mark(markName: string): void;
+    measure(measureName: string, startMarkName?: string, endMarkName?: string): void;
+    now(): number;
+    setResourceTimingBufferSize(maxSize: number): void;
+    toJSON(): any;
+}
+
+declare var Performance: {
+    prototype: Performance;
+    new(): Performance;
+};
+
+interface PerformanceEntry {
+    readonly duration: number;
+    readonly entryType: string;
+    readonly name: string;
+    readonly startTime: number;
+}
+
+declare var PerformanceEntry: {
+    prototype: PerformanceEntry;
+    new(): PerformanceEntry;
+};
+
+interface PerformanceMark extends PerformanceEntry {
+}
+
+declare var PerformanceMark: {
+    prototype: PerformanceMark;
+    new(): PerformanceMark;
+};
+
+interface PerformanceMeasure extends PerformanceEntry {
+}
+
+declare var PerformanceMeasure: {
+    prototype: PerformanceMeasure;
+    new(): PerformanceMeasure;
+};
+
+interface PerformanceNavigation {
+    readonly redirectCount: number;
+    readonly type: number;
+    toJSON(): any;
+    readonly TYPE_BACK_FORWARD: number;
+    readonly TYPE_NAVIGATE: number;
+    readonly TYPE_RELOAD: number;
+    readonly TYPE_RESERVED: number;
+}
+
+declare var PerformanceNavigation: {
+    prototype: PerformanceNavigation;
+    new(): PerformanceNavigation;
+    readonly TYPE_BACK_FORWARD: number;
+    readonly TYPE_NAVIGATE: number;
+    readonly TYPE_RELOAD: number;
+    readonly TYPE_RESERVED: number;
+};
+
+interface PerformanceNavigationTiming extends PerformanceEntry {
+    readonly connectEnd: number;
+    readonly connectStart: number;
+    readonly domainLookupEnd: number;
+    readonly domainLookupStart: number;
+    readonly domComplete: number;
+    readonly domContentLoadedEventEnd: number;
+    readonly domContentLoadedEventStart: number;
+    readonly domInteractive: number;
+    readonly domLoading: number;
+    readonly fetchStart: number;
+    readonly loadEventEnd: number;
+    readonly loadEventStart: number;
+    readonly navigationStart: number;
+    readonly redirectCount: number;
+    readonly redirectEnd: number;
+    readonly redirectStart: number;
+    readonly requestStart: number;
+    readonly responseEnd: number;
+    readonly responseStart: number;
+    readonly type: NavigationType;
+    readonly unloadEventEnd: number;
+    readonly unloadEventStart: number;
+}
+
+declare var PerformanceNavigationTiming: {
+    prototype: PerformanceNavigationTiming;
+    new(): PerformanceNavigationTiming;
+};
+
+interface PerformanceResourceTiming extends PerformanceEntry {
+    readonly connectEnd: number;
+    readonly connectStart: number;
+    readonly domainLookupEnd: number;
+    readonly domainLookupStart: number;
+    readonly fetchStart: number;
+    readonly initiatorType: string;
+    readonly redirectEnd: number;
+    readonly redirectStart: number;
+    readonly requestStart: number;
+    readonly responseEnd: number;
+    readonly responseStart: number;
+}
+
+declare var PerformanceResourceTiming: {
+    prototype: PerformanceResourceTiming;
+    new(): PerformanceResourceTiming;
+};
+
+interface PerformanceTiming {
+    readonly connectEnd: number;
+    readonly connectStart: number;
+    readonly domainLookupEnd: number;
+    readonly domainLookupStart: number;
+    readonly domComplete: number;
+    readonly domContentLoadedEventEnd: number;
+    readonly domContentLoadedEventStart: number;
+    readonly domInteractive: number;
+    readonly domLoading: number;
+    readonly fetchStart: number;
+    readonly loadEventEnd: number;
+    readonly loadEventStart: number;
+    readonly msFirstPaint: number;
+    readonly navigationStart: number;
+    readonly redirectEnd: number;
+    readonly redirectStart: number;
+    readonly requestStart: number;
+    readonly responseEnd: number;
+    readonly responseStart: number;
+    readonly unloadEventEnd: number;
+    readonly unloadEventStart: number;
+    readonly secureConnectionStart: number;
+    toJSON(): any;
+}
+
+declare var PerformanceTiming: {
+    prototype: PerformanceTiming;
+    new(): PerformanceTiming;
+};
+
+interface PerfWidgetExternal {
+    readonly activeNetworkRequestCount: number;
+    readonly averageFrameTime: number;
+    readonly averagePaintTime: number;
+    readonly extraInformationEnabled: boolean;
+    readonly independentRenderingEnabled: boolean;
+    readonly irDisablingContentString: string;
+    readonly irStatusAvailable: boolean;
+    readonly maxCpuSpeed: number;
+    readonly paintRequestsPerSecond: number;
+    readonly performanceCounter: number;
+    readonly performanceCounterFrequency: number;
+    addEventListener(eventType: string, callback: Function): void;
+    getMemoryUsage(): number;
+    getProcessCpuUsage(): number;
+    getRecentCpuUsage(last: number | null): any;
+    getRecentFrames(last: number | null): any;
+    getRecentMemoryUsage(last: number | null): any;
+    getRecentPaintRequests(last: number | null): any;
+    removeEventListener(eventType: string, callback: Function): void;
+    repositionWindow(x: number, y: number): void;
+    resizeWindow(width: number, height: number): void;
+}
+
+declare var PerfWidgetExternal: {
+    prototype: PerfWidgetExternal;
+    new(): PerfWidgetExternal;
+};
+
+interface PeriodicWave {
+}
+
+declare var PeriodicWave: {
+    prototype: PeriodicWave;
+    new(): PeriodicWave;
+};
+
+interface PermissionRequest extends DeferredPermissionRequest {
+    readonly state: MSWebViewPermissionState;
+    defer(): void;
+}
+
+declare var PermissionRequest: {
+    prototype: PermissionRequest;
+    new(): PermissionRequest;
+};
+
+interface PermissionRequestedEvent extends Event {
+    readonly permissionRequest: PermissionRequest;
+}
+
+declare var PermissionRequestedEvent: {
+    prototype: PermissionRequestedEvent;
+    new(): PermissionRequestedEvent;
+};
+
+interface Plugin {
+    readonly description: string;
+    readonly filename: string;
+    readonly length: number;
+    readonly name: string;
+    readonly version: string;
+    item(index: number): MimeType;
+    namedItem(type: string): MimeType;
+    [index: number]: MimeType;
+}
+
+declare var Plugin: {
+    prototype: Plugin;
+    new(): Plugin;
+};
+
+interface PluginArray {
+    readonly length: number;
+    item(index: number): Plugin;
+    namedItem(name: string): Plugin;
+    refresh(reload?: boolean): void;
+    [index: number]: Plugin;
+}
+
+declare var PluginArray: {
+    prototype: PluginArray;
+    new(): PluginArray;
+};
+
+interface PointerEvent extends MouseEvent {
+    readonly currentPoint: any;
+    readonly height: number;
+    readonly hwTimestamp: number;
+    readonly intermediatePoints: any;
+    readonly isPrimary: boolean;
+    readonly pointerId: number;
+    readonly pointerType: any;
+    readonly pressure: number;
+    readonly rotation: number;
+    readonly tiltX: number;
+    readonly tiltY: number;
+    readonly width: number;
+    getCurrentPoint(element: Element): void;
+    getIntermediatePoints(element: Element): void;
+    initPointerEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, ctrlKeyArg: boolean, altKeyArg: boolean, shiftKeyArg: boolean, metaKeyArg: boolean, buttonArg: number, relatedTargetArg: EventTarget, offsetXArg: number, offsetYArg: number, widthArg: number, heightArg: number, pressure: number, rotation: number, tiltX: number, tiltY: number, pointerIdArg: number, pointerType: any, hwTimestampArg: number, isPrimary: boolean): void;
+}
+
+declare var PointerEvent: {
+    prototype: PointerEvent;
+    new(typeArg: string, eventInitDict?: PointerEventInit): PointerEvent;
+};
+
+interface PopStateEvent extends Event {
+    readonly state: any;
+    initPopStateEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, stateArg: any): void;
+}
+
+declare var PopStateEvent: {
+    prototype: PopStateEvent;
+    new(typeArg: string, eventInitDict?: PopStateEventInit): PopStateEvent;
+};
+
+interface Position {
+    readonly coords: Coordinates;
+    readonly timestamp: number;
+}
+
+declare var Position: {
+    prototype: Position;
+    new(): Position;
+};
+
+interface PositionError {
+    readonly code: number;
+    readonly message: string;
+    toString(): string;
+    readonly PERMISSION_DENIED: number;
+    readonly POSITION_UNAVAILABLE: number;
+    readonly TIMEOUT: number;
+}
+
+declare var PositionError: {
+    prototype: PositionError;
+    new(): PositionError;
+    readonly PERMISSION_DENIED: number;
+    readonly POSITION_UNAVAILABLE: number;
+    readonly TIMEOUT: number;
+};
+
+interface ProcessingInstruction extends CharacterData {
+    readonly target: string;
+}
+
+declare var ProcessingInstruction: {
+    prototype: ProcessingInstruction;
+    new(): ProcessingInstruction;
+};
+
+interface ProgressEvent extends Event {
+    readonly lengthComputable: boolean;
+    readonly loaded: number;
+    readonly total: number;
+    initProgressEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, lengthComputableArg: boolean, loadedArg: number, totalArg: number): void;
+}
+
+declare var ProgressEvent: {
+    prototype: ProgressEvent;
+    new(type: string, eventInitDict?: ProgressEventInit): ProgressEvent;
+};
+
+interface PushManager {
+    getSubscription(): Promise<PushSubscription>;
+    permissionState(options?: PushSubscriptionOptionsInit): Promise<PushPermissionState>;
+    subscribe(options?: PushSubscriptionOptionsInit): Promise<PushSubscription>;
+}
+
+declare var PushManager: {
+    prototype: PushManager;
+    new(): PushManager;
+};
+
+interface PushSubscription {
+    readonly endpoint: USVString;
+    readonly options: PushSubscriptionOptions;
+    getKey(name: PushEncryptionKeyName): ArrayBuffer | null;
+    toJSON(): any;
+    unsubscribe(): Promise<boolean>;
+}
+
+declare var PushSubscription: {
+    prototype: PushSubscription;
+    new(): PushSubscription;
+};
+
+interface PushSubscriptionOptions {
+    readonly applicationServerKey: ArrayBuffer | null;
+    readonly userVisibleOnly: boolean;
+}
+
+declare var PushSubscriptionOptions: {
+    prototype: PushSubscriptionOptions;
+    new(): PushSubscriptionOptions;
+};
+
+interface Range {
+    readonly collapsed: boolean;
+    readonly commonAncestorContainer: Node;
+    readonly endContainer: Node;
+    readonly endOffset: number;
+    readonly startContainer: Node;
+    readonly startOffset: number;
+    cloneContents(): DocumentFragment;
+    cloneRange(): Range;
+    collapse(toStart: boolean): void;
+    compareBoundaryPoints(how: number, sourceRange: Range): number;
+    createContextualFragment(fragment: string): DocumentFragment;
+    deleteContents(): void;
+    detach(): void;
+    expand(Unit: ExpandGranularity): boolean;
+    extractContents(): DocumentFragment;
+    getBoundingClientRect(): ClientRect;
+    getClientRects(): ClientRectList;
+    insertNode(newNode: Node): void;
+    selectNode(refNode: Node): void;
+    selectNodeContents(refNode: Node): void;
+    setEnd(refNode: Node, offset: number): void;
+    setEndAfter(refNode: Node): void;
+    setEndBefore(refNode: Node): void;
+    setStart(refNode: Node, offset: number): void;
+    setStartAfter(refNode: Node): void;
+    setStartBefore(refNode: Node): void;
+    surroundContents(newParent: Node): void;
+    toString(): string;
+    readonly END_TO_END: number;
+    readonly END_TO_START: number;
+    readonly START_TO_END: number;
+    readonly START_TO_START: number;
+}
+
+declare var Range: {
+    prototype: Range;
+    new(): Range;
+    readonly END_TO_END: number;
+    readonly END_TO_START: number;
+    readonly START_TO_END: number;
+    readonly START_TO_START: number;
+};
+
+interface ReadableStream {
+    readonly locked: boolean;
+    cancel(): Promise<void>;
+    getReader(): ReadableStreamReader;
+}
+
+declare var ReadableStream: {
+    prototype: ReadableStream;
+    new(): ReadableStream;
+};
+
+interface ReadableStreamReader {
+    cancel(): Promise<void>;
+    read(): Promise<any>;
+    releaseLock(): void;
+}
+
+declare var ReadableStreamReader: {
+    prototype: ReadableStreamReader;
+    new(): ReadableStreamReader;
+};
+
+interface Request extends Object, Body {
+    readonly cache: RequestCache;
+    readonly credentials: RequestCredentials;
+    readonly destination: RequestDestination;
+    readonly headers: Headers;
+    readonly integrity: string;
+    readonly keepalive: boolean;
+    readonly method: string;
+    readonly mode: RequestMode;
+    readonly redirect: RequestRedirect;
+    readonly referrer: string;
+    readonly referrerPolicy: ReferrerPolicy;
+    readonly type: RequestType;
+    readonly url: string;
+    clone(): Request;
+}
+
+declare var Request: {
+    prototype: Request;
+    new(input: Request | string, init?: RequestInit): Request;
+};
+
+interface Response extends Object, Body {
+    readonly body: ReadableStream | null;
+    readonly headers: Headers;
+    readonly ok: boolean;
+    readonly status: number;
+    readonly statusText: string;
+    readonly type: ResponseType;
+    readonly url: string;
+    clone(): Response;
+}
+
+declare var Response: {
+    prototype: Response;
+    new(body?: any, init?: ResponseInit): Response;
+    error: () => Response;
+    redirect: (url: string, status?: number) => Response;
+};
+
+interface RTCDtlsTransportEventMap {
+    "dtlsstatechange": RTCDtlsTransportStateChangedEvent;
+    "error": Event;
+}
+
+interface RTCDtlsTransport extends RTCStatsProvider {
+    ondtlsstatechange: ((this: RTCDtlsTransport, ev: RTCDtlsTransportStateChangedEvent) => any) | null;
+    onerror: ((this: RTCDtlsTransport, ev: Event) => any) | null;
+    readonly state: RTCDtlsTransportState;
+    readonly transport: RTCIceTransport;
+    getLocalParameters(): RTCDtlsParameters;
+    getRemoteCertificates(): ArrayBuffer[];
+    getRemoteParameters(): RTCDtlsParameters | null;
+    start(remoteParameters: RTCDtlsParameters): void;
+    stop(): void;
+    addEventListener<K extends keyof RTCDtlsTransportEventMap>(type: K, listener: (this: RTCDtlsTransport, ev: RTCDtlsTransportEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var RTCDtlsTransport: {
+    prototype: RTCDtlsTransport;
+    new(transport: RTCIceTransport): RTCDtlsTransport;
+};
+
+interface RTCDtlsTransportStateChangedEvent extends Event {
+    readonly state: RTCDtlsTransportState;
+}
+
+declare var RTCDtlsTransportStateChangedEvent: {
+    prototype: RTCDtlsTransportStateChangedEvent;
+    new(): RTCDtlsTransportStateChangedEvent;
+};
+
+interface RTCDtmfSenderEventMap {
+    "tonechange": RTCDTMFToneChangeEvent;
+}
+
+interface RTCDtmfSender extends EventTarget {
+    readonly canInsertDTMF: boolean;
+    readonly duration: number;
+    readonly interToneGap: number;
+    ontonechange: (this: RTCDtmfSender, ev: RTCDTMFToneChangeEvent) => any;
+    readonly sender: RTCRtpSender;
+    readonly toneBuffer: string;
+    insertDTMF(tones: string, duration?: number, interToneGap?: number): void;
+    addEventListener<K extends keyof RTCDtmfSenderEventMap>(type: K, listener: (this: RTCDtmfSender, ev: RTCDtmfSenderEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var RTCDtmfSender: {
+    prototype: RTCDtmfSender;
+    new(sender: RTCRtpSender): RTCDtmfSender;
+};
+
+interface RTCDTMFToneChangeEvent extends Event {
+    readonly tone: string;
+}
+
+declare var RTCDTMFToneChangeEvent: {
+    prototype: RTCDTMFToneChangeEvent;
+    new(typeArg: string, eventInitDict: RTCDTMFToneChangeEventInit): RTCDTMFToneChangeEvent;
+};
+
+interface RTCIceCandidate {
+    candidate: string | null;
+    sdpMid: string | null;
+    sdpMLineIndex: number | null;
+    toJSON(): any;
+}
+
+declare var RTCIceCandidate: {
+    prototype: RTCIceCandidate;
+    new(candidateInitDict?: RTCIceCandidateInit): RTCIceCandidate;
+};
+
+interface RTCIceCandidatePairChangedEvent extends Event {
+    readonly pair: RTCIceCandidatePair;
+}
+
+declare var RTCIceCandidatePairChangedEvent: {
+    prototype: RTCIceCandidatePairChangedEvent;
+    new(): RTCIceCandidatePairChangedEvent;
+};
+
+interface RTCIceGathererEventMap {
+    "error": Event;
+    "localcandidate": RTCIceGathererEvent;
+}
+
+interface RTCIceGatherer extends RTCStatsProvider {
+    readonly component: RTCIceComponent;
+    onerror: ((this: RTCIceGatherer, ev: Event) => any) | null;
+    onlocalcandidate: ((this: RTCIceGatherer, ev: RTCIceGathererEvent) => any) | null;
+    createAssociatedGatherer(): RTCIceGatherer;
+    getLocalCandidates(): RTCIceCandidateDictionary[];
+    getLocalParameters(): RTCIceParameters;
+    addEventListener<K extends keyof RTCIceGathererEventMap>(type: K, listener: (this: RTCIceGatherer, ev: RTCIceGathererEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var RTCIceGatherer: {
+    prototype: RTCIceGatherer;
+    new(options: RTCIceGatherOptions): RTCIceGatherer;
+};
+
+interface RTCIceGathererEvent extends Event {
+    readonly candidate: RTCIceCandidateDictionary | RTCIceCandidateComplete;
+}
+
+declare var RTCIceGathererEvent: {
+    prototype: RTCIceGathererEvent;
+    new(): RTCIceGathererEvent;
+};
+
+interface RTCIceTransportEventMap {
+    "candidatepairchange": RTCIceCandidatePairChangedEvent;
+    "icestatechange": RTCIceTransportStateChangedEvent;
+}
+
+interface RTCIceTransport extends RTCStatsProvider {
+    readonly component: RTCIceComponent;
+    readonly iceGatherer: RTCIceGatherer | null;
+    oncandidatepairchange: ((this: RTCIceTransport, ev: RTCIceCandidatePairChangedEvent) => any) | null;
+    onicestatechange: ((this: RTCIceTransport, ev: RTCIceTransportStateChangedEvent) => any) | null;
+    readonly role: RTCIceRole;
+    readonly state: RTCIceTransportState;
+    addRemoteCandidate(remoteCandidate: RTCIceCandidateDictionary | RTCIceCandidateComplete): void;
+    createAssociatedTransport(): RTCIceTransport;
+    getNominatedCandidatePair(): RTCIceCandidatePair | null;
+    getRemoteCandidates(): RTCIceCandidateDictionary[];
+    getRemoteParameters(): RTCIceParameters | null;
+    setRemoteCandidates(remoteCandidates: RTCIceCandidateDictionary[]): void;
+    start(gatherer: RTCIceGatherer, remoteParameters: RTCIceParameters, role?: RTCIceRole): void;
+    stop(): void;
+    addEventListener<K extends keyof RTCIceTransportEventMap>(type: K, listener: (this: RTCIceTransport, ev: RTCIceTransportEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var RTCIceTransport: {
+    prototype: RTCIceTransport;
+    new(): RTCIceTransport;
+};
+
+interface RTCIceTransportStateChangedEvent extends Event {
+    readonly state: RTCIceTransportState;
+}
+
+declare var RTCIceTransportStateChangedEvent: {
+    prototype: RTCIceTransportStateChangedEvent;
+    new(): RTCIceTransportStateChangedEvent;
+};
+
+interface RTCPeerConnectionEventMap {
+    "addstream": MediaStreamEvent;
+    "icecandidate": RTCPeerConnectionIceEvent;
+    "iceconnectionstatechange": Event;
+    "icegatheringstatechange": Event;
+    "negotiationneeded": Event;
+    "removestream": MediaStreamEvent;
+    "signalingstatechange": Event;
+}
+
+interface RTCPeerConnection extends EventTarget {
+    readonly canTrickleIceCandidates: boolean | null;
+    readonly iceConnectionState: RTCIceConnectionState;
+    readonly iceGatheringState: RTCIceGatheringState;
+    readonly localDescription: RTCSessionDescription | null;
+    onaddstream: (this: RTCPeerConnection, ev: MediaStreamEvent) => any;
+    onicecandidate: (this: RTCPeerConnection, ev: RTCPeerConnectionIceEvent) => any;
+    oniceconnectionstatechange: (this: RTCPeerConnection, ev: Event) => any;
+    onicegatheringstatechange: (this: RTCPeerConnection, ev: Event) => any;
+    onnegotiationneeded: (this: RTCPeerConnection, ev: Event) => any;
+    onremovestream: (this: RTCPeerConnection, ev: MediaStreamEvent) => any;
+    onsignalingstatechange: (this: RTCPeerConnection, ev: Event) => any;
+    readonly remoteDescription: RTCSessionDescription | null;
+    readonly signalingState: RTCSignalingState;
+    addIceCandidate(candidate: RTCIceCandidate, successCallback?: VoidFunction, failureCallback?: RTCPeerConnectionErrorCallback): Promise<void>;
+    addStream(stream: MediaStream): void;
+    close(): void;
+    createAnswer(successCallback?: RTCSessionDescriptionCallback, failureCallback?: RTCPeerConnectionErrorCallback): Promise<RTCSessionDescription>;
+    createOffer(successCallback?: RTCSessionDescriptionCallback, failureCallback?: RTCPeerConnectionErrorCallback, options?: RTCOfferOptions): Promise<RTCSessionDescription>;
+    getConfiguration(): RTCConfiguration;
+    getLocalStreams(): MediaStream[];
+    getRemoteStreams(): MediaStream[];
+    getStats(selector: MediaStreamTrack | null, successCallback?: RTCStatsCallback, failureCallback?: RTCPeerConnectionErrorCallback): Promise<RTCStatsReport>;
+    getStreamById(streamId: string): MediaStream | null;
+    removeStream(stream: MediaStream): void;
+    setLocalDescription(description: RTCSessionDescription, successCallback?: VoidFunction, failureCallback?: RTCPeerConnectionErrorCallback): Promise<void>;
+    setRemoteDescription(description: RTCSessionDescription, successCallback?: VoidFunction, failureCallback?: RTCPeerConnectionErrorCallback): Promise<void>;
+    addEventListener<K extends keyof RTCPeerConnectionEventMap>(type: K, listener: (this: RTCPeerConnection, ev: RTCPeerConnectionEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var RTCPeerConnection: {
+    prototype: RTCPeerConnection;
+    new(configuration: RTCConfiguration): RTCPeerConnection;
+};
+
+interface RTCPeerConnectionIceEvent extends Event {
+    readonly candidate: RTCIceCandidate;
+}
+
+declare var RTCPeerConnectionIceEvent: {
+    prototype: RTCPeerConnectionIceEvent;
+    new(type: string, eventInitDict: RTCPeerConnectionIceEventInit): RTCPeerConnectionIceEvent;
+};
+
+interface RTCRtpReceiverEventMap {
+    "error": Event;
+}
+
+interface RTCRtpReceiver extends RTCStatsProvider {
+    onerror: ((this: RTCRtpReceiver, ev: Event) => any) | null;
+    readonly rtcpTransport: RTCDtlsTransport;
+    readonly track: MediaStreamTrack | null;
+    readonly transport: RTCDtlsTransport | RTCSrtpSdesTransport;
+    getContributingSources(): RTCRtpContributingSource[];
+    receive(parameters: RTCRtpParameters): void;
+    requestSendCSRC(csrc: number): void;
+    setTransport(transport: RTCDtlsTransport | RTCSrtpSdesTransport, rtcpTransport?: RTCDtlsTransport): void;
+    stop(): void;
+    addEventListener<K extends keyof RTCRtpReceiverEventMap>(type: K, listener: (this: RTCRtpReceiver, ev: RTCRtpReceiverEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var RTCRtpReceiver: {
+    prototype: RTCRtpReceiver;
+    new(transport: RTCDtlsTransport | RTCSrtpSdesTransport, kind: string, rtcpTransport?: RTCDtlsTransport): RTCRtpReceiver;
+    getCapabilities(kind?: string): RTCRtpCapabilities;
+};
+
+interface RTCRtpSenderEventMap {
+    "error": Event;
+    "ssrcconflict": RTCSsrcConflictEvent;
+}
+
+interface RTCRtpSender extends RTCStatsProvider {
+    onerror: ((this: RTCRtpSender, ev: Event) => any) | null;
+    onssrcconflict: ((this: RTCRtpSender, ev: RTCSsrcConflictEvent) => any) | null;
+    readonly rtcpTransport: RTCDtlsTransport;
+    readonly track: MediaStreamTrack;
+    readonly transport: RTCDtlsTransport | RTCSrtpSdesTransport;
+    send(parameters: RTCRtpParameters): void;
+    setTrack(track: MediaStreamTrack): void;
+    setTransport(transport: RTCDtlsTransport | RTCSrtpSdesTransport, rtcpTransport?: RTCDtlsTransport): void;
+    stop(): void;
+    addEventListener<K extends keyof RTCRtpSenderEventMap>(type: K, listener: (this: RTCRtpSender, ev: RTCRtpSenderEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var RTCRtpSender: {
+    prototype: RTCRtpSender;
+    new(track: MediaStreamTrack, transport: RTCDtlsTransport | RTCSrtpSdesTransport, rtcpTransport?: RTCDtlsTransport): RTCRtpSender;
+    getCapabilities(kind?: string): RTCRtpCapabilities;
+};
+
+interface RTCSessionDescription {
+    sdp: string | null;
+    type: RTCSdpType | null;
+    toJSON(): any;
+}
+
+declare var RTCSessionDescription: {
+    prototype: RTCSessionDescription;
+    new(descriptionInitDict?: RTCSessionDescriptionInit): RTCSessionDescription;
+};
+
+interface RTCSrtpSdesTransportEventMap {
+    "error": Event;
+}
+
+interface RTCSrtpSdesTransport extends EventTarget {
+    onerror: ((this: RTCSrtpSdesTransport, ev: Event) => any) | null;
+    readonly transport: RTCIceTransport;
+    addEventListener<K extends keyof RTCSrtpSdesTransportEventMap>(type: K, listener: (this: RTCSrtpSdesTransport, ev: RTCSrtpSdesTransportEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var RTCSrtpSdesTransport: {
+    prototype: RTCSrtpSdesTransport;
+    new(transport: RTCIceTransport, encryptParameters: RTCSrtpSdesParameters, decryptParameters: RTCSrtpSdesParameters): RTCSrtpSdesTransport;
+    getLocalParameters(): RTCSrtpSdesParameters[];
+};
+
+interface RTCSsrcConflictEvent extends Event {
+    readonly ssrc: number;
+}
+
+declare var RTCSsrcConflictEvent: {
+    prototype: RTCSsrcConflictEvent;
+    new(): RTCSsrcConflictEvent;
+};
+
+interface RTCStatsProvider extends EventTarget {
+    getStats(): Promise<RTCStatsReport>;
+    msGetStats(): Promise<RTCStatsReport>;
+}
+
+declare var RTCStatsProvider: {
+    prototype: RTCStatsProvider;
+    new(): RTCStatsProvider;
+};
+
+interface ScopedCredential {
+    readonly id: ArrayBuffer;
+    readonly type: ScopedCredentialType;
+}
+
+declare var ScopedCredential: {
+    prototype: ScopedCredential;
+    new(): ScopedCredential;
+};
+
+interface ScopedCredentialInfo {
+    readonly credential: ScopedCredential;
+    readonly publicKey: CryptoKey;
+}
+
+declare var ScopedCredentialInfo: {
+    prototype: ScopedCredentialInfo;
+    new(): ScopedCredentialInfo;
+};
+
+interface ScreenEventMap {
+    "MSOrientationChange": Event;
+}
+
+interface Screen extends EventTarget {
+    readonly availHeight: number;
+    readonly availWidth: number;
+    bufferDepth: number;
+    readonly colorDepth: number;
+    readonly deviceXDPI: number;
+    readonly deviceYDPI: number;
+    readonly fontSmoothingEnabled: boolean;
+    readonly height: number;
+    readonly logicalXDPI: number;
+    readonly logicalYDPI: number;
+    readonly msOrientation: string;
+    onmsorientationchange: (this: Screen, ev: Event) => any;
+    readonly pixelDepth: number;
+    readonly systemXDPI: number;
+    readonly systemYDPI: number;
+    readonly width: number;
+    msLockOrientation(orientations: string | string[]): boolean;
+    msUnlockOrientation(): void;
+    addEventListener<K extends keyof ScreenEventMap>(type: K, listener: (this: Screen, ev: ScreenEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var Screen: {
+    prototype: Screen;
+    new(): Screen;
+};
+
+interface ScriptNotifyEvent extends Event {
+    readonly callingUri: string;
+    readonly value: string;
+}
+
+declare var ScriptNotifyEvent: {
+    prototype: ScriptNotifyEvent;
+    new(): ScriptNotifyEvent;
+};
+
+interface ScriptProcessorNodeEventMap {
+    "audioprocess": AudioProcessingEvent;
+}
+
+interface ScriptProcessorNode extends AudioNode {
+    readonly bufferSize: number;
+    onaudioprocess: (this: ScriptProcessorNode, ev: AudioProcessingEvent) => any;
+    addEventListener<K extends keyof ScriptProcessorNodeEventMap>(type: K, listener: (this: ScriptProcessorNode, ev: ScriptProcessorNodeEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var ScriptProcessorNode: {
+    prototype: ScriptProcessorNode;
+    new(): ScriptProcessorNode;
+};
+
+interface Selection {
+    readonly anchorNode: Node;
+    readonly anchorOffset: number;
+    readonly baseNode: Node;
+    readonly baseOffset: number;
+    readonly extentNode: Node;
+    readonly extentOffset: number;
+    readonly focusNode: Node;
+    readonly focusOffset: number;
+    readonly isCollapsed: boolean;
+    readonly rangeCount: number;
+    readonly type: string;
+    addRange(range: Range): void;
+    collapse(parentNode: Node, offset: number): void;
+    collapseToEnd(): void;
+    collapseToStart(): void;
+    containsNode(node: Node, partlyContained: boolean): boolean;
+    deleteFromDocument(): void;
+    empty(): void;
+    extend(newNode: Node, offset: number): void;
+    getRangeAt(index: number): Range;
+    removeAllRanges(): void;
+    removeRange(range: Range): void;
+    selectAllChildren(parentNode: Node): void;
+    setBaseAndExtent(baseNode: Node, baseOffset: number, extentNode: Node, extentOffset: number): void;
+    setPosition(parentNode: Node, offset: number): void;
+    toString(): string;
+}
+
+declare var Selection: {
+    prototype: Selection;
+    new(): Selection;
+};
+
+interface ServiceWorkerEventMap extends AbstractWorkerEventMap {
+    "statechange": Event;
+}
+
+interface ServiceWorker extends EventTarget, AbstractWorker {
+    onstatechange: (this: ServiceWorker, ev: Event) => any;
+    readonly scriptURL: USVString;
+    readonly state: ServiceWorkerState;
+    postMessage(message: any, transfer?: any[]): void;
+    addEventListener<K extends keyof ServiceWorkerEventMap>(type: K, listener: (this: ServiceWorker, ev: ServiceWorkerEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var ServiceWorker: {
+    prototype: ServiceWorker;
+    new(): ServiceWorker;
+};
+
+interface ServiceWorkerContainerEventMap {
+    "controllerchange": Event;
+    "message": ServiceWorkerMessageEvent;
+}
+
+interface ServiceWorkerContainer extends EventTarget {
+    readonly controller: ServiceWorker | null;
+    oncontrollerchange: (this: ServiceWorkerContainer, ev: Event) => any;
+    onmessage: (this: ServiceWorkerContainer, ev: ServiceWorkerMessageEvent) => any;
+    readonly ready: Promise<ServiceWorkerRegistration>;
+    getRegistration(clientURL?: USVString): Promise<any>;
+    getRegistrations(): any;
+    register(scriptURL: USVString, options?: RegistrationOptions): Promise<ServiceWorkerRegistration>;
+    addEventListener<K extends keyof ServiceWorkerContainerEventMap>(type: K, listener: (this: ServiceWorkerContainer, ev: ServiceWorkerContainerEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var ServiceWorkerContainer: {
+    prototype: ServiceWorkerContainer;
+    new(): ServiceWorkerContainer;
+};
+
+interface ServiceWorkerMessageEvent extends Event {
+    readonly data: any;
+    readonly lastEventId: string;
+    readonly origin: string;
+    readonly ports: MessagePort[] | null;
+    readonly source: ServiceWorker | MessagePort | null;
+}
+
+declare var ServiceWorkerMessageEvent: {
+    prototype: ServiceWorkerMessageEvent;
+    new(type: string, eventInitDict?: ServiceWorkerMessageEventInit): ServiceWorkerMessageEvent;
+};
+
+interface ServiceWorkerRegistrationEventMap {
+    "updatefound": Event;
+}
+
+interface ServiceWorkerRegistration extends EventTarget {
+    readonly active: ServiceWorker | null;
+    readonly installing: ServiceWorker | null;
+    onupdatefound: (this: ServiceWorkerRegistration, ev: Event) => any;
+    readonly pushManager: PushManager;
+    readonly scope: USVString;
+    readonly sync: SyncManager;
+    readonly waiting: ServiceWorker | null;
+    getNotifications(filter?: GetNotificationOptions): any;
+    showNotification(title: string, options?: NotificationOptions): Promise<void>;
+    unregister(): Promise<boolean>;
+    update(): Promise<void>;
+    addEventListener<K extends keyof ServiceWorkerRegistrationEventMap>(type: K, listener: (this: ServiceWorkerRegistration, ev: ServiceWorkerRegistrationEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var ServiceWorkerRegistration: {
+    prototype: ServiceWorkerRegistration;
+    new(): ServiceWorkerRegistration;
+};
+
+interface SourceBuffer extends EventTarget {
+    appendWindowEnd: number;
+    appendWindowStart: number;
+    readonly audioTracks: AudioTrackList;
+    readonly buffered: TimeRanges;
+    mode: AppendMode;
+    timestampOffset: number;
+    readonly updating: boolean;
+    readonly videoTracks: VideoTrackList;
+    abort(): void;
+    appendBuffer(data: ArrayBuffer | ArrayBufferView): void;
+    appendStream(stream: MSStream, maxSize?: number): void;
+    remove(start: number, end: number): void;
+}
+
+declare var SourceBuffer: {
+    prototype: SourceBuffer;
+    new(): SourceBuffer;
+};
+
+interface SourceBufferList extends EventTarget {
+    readonly length: number;
+    item(index: number): SourceBuffer;
+    [index: number]: SourceBuffer;
+}
+
+declare var SourceBufferList: {
+    prototype: SourceBufferList;
+    new(): SourceBufferList;
+};
+
+interface SpeechSynthesisEventMap {
+    "voiceschanged": Event;
+}
+
+interface SpeechSynthesis extends EventTarget {
+    onvoiceschanged: (this: SpeechSynthesis, ev: Event) => any;
+    readonly paused: boolean;
+    readonly pending: boolean;
+    readonly speaking: boolean;
+    cancel(): void;
+    getVoices(): SpeechSynthesisVoice[];
+    pause(): void;
+    resume(): void;
+    speak(utterance: SpeechSynthesisUtterance): void;
+    addEventListener<K extends keyof SpeechSynthesisEventMap>(type: K, listener: (this: SpeechSynthesis, ev: SpeechSynthesisEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SpeechSynthesis: {
+    prototype: SpeechSynthesis;
+    new(): SpeechSynthesis;
+};
+
+interface SpeechSynthesisEvent extends Event {
+    readonly charIndex: number;
+    readonly elapsedTime: number;
+    readonly name: string;
+    readonly utterance: SpeechSynthesisUtterance | null;
+}
+
+declare var SpeechSynthesisEvent: {
+    prototype: SpeechSynthesisEvent;
+    new(type: string, eventInitDict?: SpeechSynthesisEventInit): SpeechSynthesisEvent;
+};
+
+interface SpeechSynthesisUtteranceEventMap {
+    "boundary": Event;
+    "end": Event;
+    "error": Event;
+    "mark": Event;
+    "pause": Event;
+    "resume": Event;
+    "start": Event;
+}
+
+interface SpeechSynthesisUtterance extends EventTarget {
+    lang: string;
+    onboundary: (this: SpeechSynthesisUtterance, ev: Event) => any;
+    onend: (this: SpeechSynthesisUtterance, ev: Event) => any;
+    onerror: (this: SpeechSynthesisUtterance, ev: Event) => any;
+    onmark: (this: SpeechSynthesisUtterance, ev: Event) => any;
+    onpause: (this: SpeechSynthesisUtterance, ev: Event) => any;
+    onresume: (this: SpeechSynthesisUtterance, ev: Event) => any;
+    onstart: (this: SpeechSynthesisUtterance, ev: Event) => any;
+    pitch: number;
+    rate: number;
+    text: string;
+    voice: SpeechSynthesisVoice;
+    volume: number;
+    addEventListener<K extends keyof SpeechSynthesisUtteranceEventMap>(type: K, listener: (this: SpeechSynthesisUtterance, ev: SpeechSynthesisUtteranceEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SpeechSynthesisUtterance: {
+    prototype: SpeechSynthesisUtterance;
+    new(text?: string): SpeechSynthesisUtterance;
+};
+
+interface SpeechSynthesisVoice {
+    readonly default: boolean;
+    readonly lang: string;
+    readonly localService: boolean;
+    readonly name: string;
+    readonly voiceURI: string;
+}
+
+declare var SpeechSynthesisVoice: {
+    prototype: SpeechSynthesisVoice;
+    new(): SpeechSynthesisVoice;
+};
+
+interface StereoPannerNode extends AudioNode {
+    readonly pan: AudioParam;
+}
+
+declare var StereoPannerNode: {
+    prototype: StereoPannerNode;
+    new(): StereoPannerNode;
+};
+
+interface Storage {
+    readonly length: number;
+    clear(): void;
+    getItem(key: string): string | null;
+    key(index: number): string | null;
+    removeItem(key: string): void;
+    setItem(key: string, data: string): void;
+    [key: string]: any;
+    [index: number]: string;
+}
+
+declare var Storage: {
+    prototype: Storage;
+    new(): Storage;
+};
+
+interface StorageEvent extends Event {
+    readonly url: string;
+    key?: string;
+    oldValue?: string;
+    newValue?: string;
+    storageArea?: Storage;
+}
+
+declare var StorageEvent: {
+    prototype: StorageEvent;
+    new (type: string, eventInitDict?: StorageEventInit): StorageEvent;
+};
+
+interface StyleMedia {
+    readonly type: string;
+    matchMedium(mediaquery: string): boolean;
+}
+
+declare var StyleMedia: {
+    prototype: StyleMedia;
+    new(): StyleMedia;
+};
+
+interface StyleSheet {
+    disabled: boolean;
+    readonly href: string;
+    readonly media: MediaList;
+    readonly ownerNode: Node;
+    readonly parentStyleSheet: StyleSheet;
+    readonly title: string;
+    readonly type: string;
+}
+
+declare var StyleSheet: {
+    prototype: StyleSheet;
+    new(): StyleSheet;
+};
+
+interface StyleSheetList {
+    readonly length: number;
+    item(index?: number): StyleSheet;
+    [index: number]: StyleSheet;
+}
+
+declare var StyleSheetList: {
+    prototype: StyleSheetList;
+    new(): StyleSheetList;
+};
+
+interface StyleSheetPageList {
+    readonly length: number;
+    item(index: number): CSSPageRule;
+    [index: number]: CSSPageRule;
+}
+
+declare var StyleSheetPageList: {
+    prototype: StyleSheetPageList;
+    new(): StyleSheetPageList;
+};
+
+interface SubtleCrypto {
+    decrypt(algorithm: string | RsaOaepParams | AesCtrParams | AesCbcParams | AesCmacParams | AesGcmParams | AesCfbParams, key: CryptoKey, data: BufferSource): PromiseLike<ArrayBuffer>;
+    deriveBits(algorithm: string | EcdhKeyDeriveParams | DhKeyDeriveParams | ConcatParams | HkdfCtrParams | Pbkdf2Params, baseKey: CryptoKey, length: number): PromiseLike<ArrayBuffer>;
+    deriveKey(algorithm: string | EcdhKeyDeriveParams | DhKeyDeriveParams | ConcatParams | HkdfCtrParams | Pbkdf2Params, baseKey: CryptoKey, derivedKeyType: string | AesDerivedKeyParams | HmacImportParams | ConcatParams | HkdfCtrParams | Pbkdf2Params, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
+    digest(algorithm: AlgorithmIdentifier, data: BufferSource): PromiseLike<ArrayBuffer>;
+    encrypt(algorithm: string | RsaOaepParams | AesCtrParams | AesCbcParams | AesCmacParams | AesGcmParams | AesCfbParams, key: CryptoKey, data: BufferSource): PromiseLike<ArrayBuffer>;
+    exportKey(format: "jwk", key: CryptoKey): PromiseLike<JsonWebKey>;
+    exportKey(format: "raw" | "pkcs8" | "spki", key: CryptoKey): PromiseLike<ArrayBuffer>;
+    exportKey(format: string, key: CryptoKey): PromiseLike<JsonWebKey | ArrayBuffer>;
+    generateKey(algorithm: string, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKeyPair | CryptoKey>;
+    generateKey(algorithm: RsaHashedKeyGenParams | EcKeyGenParams | DhKeyGenParams, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKeyPair>;
+    generateKey(algorithm: AesKeyGenParams | HmacKeyGenParams | Pbkdf2Params, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
+    importKey(format: "jwk", keyData: JsonWebKey, algorithm: string | RsaHashedImportParams | EcKeyImportParams | HmacImportParams | DhImportKeyParams, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
+    importKey(format: "raw" | "pkcs8" | "spki", keyData: BufferSource, algorithm: string | RsaHashedImportParams | EcKeyImportParams | HmacImportParams | DhImportKeyParams, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
+    importKey(format: string, keyData: JsonWebKey | BufferSource, algorithm: string | RsaHashedImportParams | EcKeyImportParams | HmacImportParams | DhImportKeyParams, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
+    sign(algorithm: string | RsaPssParams | EcdsaParams | AesCmacParams, key: CryptoKey, data: BufferSource): PromiseLike<ArrayBuffer>;
+    unwrapKey(format: string, wrappedKey: BufferSource, unwrappingKey: CryptoKey, unwrapAlgorithm: AlgorithmIdentifier, unwrappedKeyAlgorithm: AlgorithmIdentifier, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
+    verify(algorithm: string | RsaPssParams | EcdsaParams | AesCmacParams, key: CryptoKey, signature: BufferSource, data: BufferSource): PromiseLike<boolean>;
+    wrapKey(format: string, key: CryptoKey, wrappingKey: CryptoKey, wrapAlgorithm: AlgorithmIdentifier): PromiseLike<ArrayBuffer>;
+}
+
+declare var SubtleCrypto: {
+    prototype: SubtleCrypto;
+    new(): SubtleCrypto;
+};
+
+interface SVGAElement extends SVGGraphicsElement, SVGURIReference {
+    readonly target: SVGAnimatedString;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGAElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGAElement: {
+    prototype: SVGAElement;
+    new(): SVGAElement;
+};
+
+interface SVGAngle {
+    readonly unitType: number;
+    value: number;
+    valueAsString: string;
+    valueInSpecifiedUnits: number;
+    convertToSpecifiedUnits(unitType: number): void;
+    newValueSpecifiedUnits(unitType: number, valueInSpecifiedUnits: number): void;
+    readonly SVG_ANGLETYPE_DEG: number;
+    readonly SVG_ANGLETYPE_GRAD: number;
+    readonly SVG_ANGLETYPE_RAD: number;
+    readonly SVG_ANGLETYPE_UNKNOWN: number;
+    readonly SVG_ANGLETYPE_UNSPECIFIED: number;
+}
+
+declare var SVGAngle: {
+    prototype: SVGAngle;
+    new(): SVGAngle;
+    readonly SVG_ANGLETYPE_DEG: number;
+    readonly SVG_ANGLETYPE_GRAD: number;
+    readonly SVG_ANGLETYPE_RAD: number;
+    readonly SVG_ANGLETYPE_UNKNOWN: number;
+    readonly SVG_ANGLETYPE_UNSPECIFIED: number;
+};
+
+interface SVGAnimatedAngle {
+    readonly animVal: SVGAngle;
+    readonly baseVal: SVGAngle;
+}
+
+declare var SVGAnimatedAngle: {
+    prototype: SVGAnimatedAngle;
+    new(): SVGAnimatedAngle;
+};
+
+interface SVGAnimatedBoolean {
+    readonly animVal: boolean;
+    baseVal: boolean;
+}
+
+declare var SVGAnimatedBoolean: {
+    prototype: SVGAnimatedBoolean;
+    new(): SVGAnimatedBoolean;
+};
+
+interface SVGAnimatedEnumeration {
+    readonly animVal: number;
+    baseVal: number;
+}
+
+declare var SVGAnimatedEnumeration: {
+    prototype: SVGAnimatedEnumeration;
+    new(): SVGAnimatedEnumeration;
+};
+
+interface SVGAnimatedInteger {
+    readonly animVal: number;
+    baseVal: number;
+}
+
+declare var SVGAnimatedInteger: {
+    prototype: SVGAnimatedInteger;
+    new(): SVGAnimatedInteger;
+};
+
+interface SVGAnimatedLength {
+    readonly animVal: SVGLength;
+    readonly baseVal: SVGLength;
+}
+
+declare var SVGAnimatedLength: {
+    prototype: SVGAnimatedLength;
+    new(): SVGAnimatedLength;
+};
+
+interface SVGAnimatedLengthList {
+    readonly animVal: SVGLengthList;
+    readonly baseVal: SVGLengthList;
+}
+
+declare var SVGAnimatedLengthList: {
+    prototype: SVGAnimatedLengthList;
+    new(): SVGAnimatedLengthList;
+};
+
+interface SVGAnimatedNumber {
+    readonly animVal: number;
+    baseVal: number;
+}
+
+declare var SVGAnimatedNumber: {
+    prototype: SVGAnimatedNumber;
+    new(): SVGAnimatedNumber;
+};
+
+interface SVGAnimatedNumberList {
+    readonly animVal: SVGNumberList;
+    readonly baseVal: SVGNumberList;
+}
+
+declare var SVGAnimatedNumberList: {
+    prototype: SVGAnimatedNumberList;
+    new(): SVGAnimatedNumberList;
+};
+
+interface SVGAnimatedPreserveAspectRatio {
+    readonly animVal: SVGPreserveAspectRatio;
+    readonly baseVal: SVGPreserveAspectRatio;
+}
+
+declare var SVGAnimatedPreserveAspectRatio: {
+    prototype: SVGAnimatedPreserveAspectRatio;
+    new(): SVGAnimatedPreserveAspectRatio;
+};
+
+interface SVGAnimatedRect {
+    readonly animVal: SVGRect;
+    readonly baseVal: SVGRect;
+}
+
+declare var SVGAnimatedRect: {
+    prototype: SVGAnimatedRect;
+    new(): SVGAnimatedRect;
+};
+
+interface SVGAnimatedString {
+    readonly animVal: string;
+    baseVal: string;
+}
+
+declare var SVGAnimatedString: {
+    prototype: SVGAnimatedString;
+    new(): SVGAnimatedString;
+};
+
+interface SVGAnimatedTransformList {
+    readonly animVal: SVGTransformList;
+    readonly baseVal: SVGTransformList;
+}
+
+declare var SVGAnimatedTransformList: {
+    prototype: SVGAnimatedTransformList;
+    new(): SVGAnimatedTransformList;
+};
+
+interface SVGCircleElement extends SVGGraphicsElement {
+    readonly cx: SVGAnimatedLength;
+    readonly cy: SVGAnimatedLength;
+    readonly r: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGCircleElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGCircleElement: {
+    prototype: SVGCircleElement;
+    new(): SVGCircleElement;
+};
+
+interface SVGClipPathElement extends SVGGraphicsElement, SVGUnitTypes {
+    readonly clipPathUnits: SVGAnimatedEnumeration;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGClipPathElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGClipPathElement: {
+    prototype: SVGClipPathElement;
+    new(): SVGClipPathElement;
+};
+
+interface SVGComponentTransferFunctionElement extends SVGElement {
+    readonly amplitude: SVGAnimatedNumber;
+    readonly exponent: SVGAnimatedNumber;
+    readonly intercept: SVGAnimatedNumber;
+    readonly offset: SVGAnimatedNumber;
+    readonly slope: SVGAnimatedNumber;
+    readonly tableValues: SVGAnimatedNumberList;
+    readonly type: SVGAnimatedEnumeration;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_DISCRETE: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_GAMMA: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_IDENTITY: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_LINEAR: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_TABLE: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGComponentTransferFunctionElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGComponentTransferFunctionElement: {
+    prototype: SVGComponentTransferFunctionElement;
+    new(): SVGComponentTransferFunctionElement;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_DISCRETE: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_GAMMA: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_IDENTITY: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_LINEAR: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_TABLE: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_UNKNOWN: number;
+};
+
+interface SVGDefsElement extends SVGGraphicsElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGDefsElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGDefsElement: {
+    prototype: SVGDefsElement;
+    new(): SVGDefsElement;
+};
+
+interface SVGDescElement extends SVGElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGDescElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGDescElement: {
+    prototype: SVGDescElement;
+    new(): SVGDescElement;
+};
+
+interface SVGElementEventMap extends ElementEventMap {
+    "click": MouseEvent;
+    "dblclick": MouseEvent;
+    "focusin": FocusEvent;
+    "focusout": FocusEvent;
+    "load": Event;
+    "mousedown": MouseEvent;
+    "mousemove": MouseEvent;
+    "mouseout": MouseEvent;
+    "mouseover": MouseEvent;
+    "mouseup": MouseEvent;
+}
+
+interface SVGElement extends Element {
+    className: any;
+    onclick: (this: SVGElement, ev: MouseEvent) => any;
+    ondblclick: (this: SVGElement, ev: MouseEvent) => any;
+    onfocusin: (this: SVGElement, ev: FocusEvent) => any;
+    onfocusout: (this: SVGElement, ev: FocusEvent) => any;
+    onload: (this: SVGElement, ev: Event) => any;
+    onmousedown: (this: SVGElement, ev: MouseEvent) => any;
+    onmousemove: (this: SVGElement, ev: MouseEvent) => any;
+    onmouseout: (this: SVGElement, ev: MouseEvent) => any;
+    onmouseover: (this: SVGElement, ev: MouseEvent) => any;
+    onmouseup: (this: SVGElement, ev: MouseEvent) => any;
+    readonly ownerSVGElement: SVGSVGElement;
+    readonly style: CSSStyleDeclaration;
+    readonly viewportElement: SVGElement;
+    xmlbase: string;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGElement: {
+    prototype: SVGElement;
+    new(): SVGElement;
+};
+
+interface SVGElementInstance extends EventTarget {
+    readonly childNodes: SVGElementInstanceList;
+    readonly correspondingElement: SVGElement;
+    readonly correspondingUseElement: SVGUseElement;
+    readonly firstChild: SVGElementInstance;
+    readonly lastChild: SVGElementInstance;
+    readonly nextSibling: SVGElementInstance;
+    readonly parentNode: SVGElementInstance;
+    readonly previousSibling: SVGElementInstance;
+}
+
+declare var SVGElementInstance: {
+    prototype: SVGElementInstance;
+    new(): SVGElementInstance;
+};
+
+interface SVGElementInstanceList {
+    readonly length: number;
+    item(index: number): SVGElementInstance;
+}
+
+declare var SVGElementInstanceList: {
+    prototype: SVGElementInstanceList;
+    new(): SVGElementInstanceList;
+};
+
+interface SVGEllipseElement extends SVGGraphicsElement {
+    readonly cx: SVGAnimatedLength;
+    readonly cy: SVGAnimatedLength;
+    readonly rx: SVGAnimatedLength;
+    readonly ry: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGEllipseElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGEllipseElement: {
+    prototype: SVGEllipseElement;
+    new(): SVGEllipseElement;
+};
+
+interface SVGFEBlendElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    readonly in2: SVGAnimatedString;
+    readonly mode: SVGAnimatedEnumeration;
+    readonly SVG_FEBLEND_MODE_COLOR: number;
+    readonly SVG_FEBLEND_MODE_COLOR_BURN: number;
+    readonly SVG_FEBLEND_MODE_COLOR_DODGE: number;
+    readonly SVG_FEBLEND_MODE_DARKEN: number;
+    readonly SVG_FEBLEND_MODE_DIFFERENCE: number;
+    readonly SVG_FEBLEND_MODE_EXCLUSION: number;
+    readonly SVG_FEBLEND_MODE_HARD_LIGHT: number;
+    readonly SVG_FEBLEND_MODE_HUE: number;
+    readonly SVG_FEBLEND_MODE_LIGHTEN: number;
+    readonly SVG_FEBLEND_MODE_LUMINOSITY: number;
+    readonly SVG_FEBLEND_MODE_MULTIPLY: number;
+    readonly SVG_FEBLEND_MODE_NORMAL: number;
+    readonly SVG_FEBLEND_MODE_OVERLAY: number;
+    readonly SVG_FEBLEND_MODE_SATURATION: number;
+    readonly SVG_FEBLEND_MODE_SCREEN: number;
+    readonly SVG_FEBLEND_MODE_SOFT_LIGHT: number;
+    readonly SVG_FEBLEND_MODE_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEBlendElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEBlendElement: {
+    prototype: SVGFEBlendElement;
+    new(): SVGFEBlendElement;
+    readonly SVG_FEBLEND_MODE_COLOR: number;
+    readonly SVG_FEBLEND_MODE_COLOR_BURN: number;
+    readonly SVG_FEBLEND_MODE_COLOR_DODGE: number;
+    readonly SVG_FEBLEND_MODE_DARKEN: number;
+    readonly SVG_FEBLEND_MODE_DIFFERENCE: number;
+    readonly SVG_FEBLEND_MODE_EXCLUSION: number;
+    readonly SVG_FEBLEND_MODE_HARD_LIGHT: number;
+    readonly SVG_FEBLEND_MODE_HUE: number;
+    readonly SVG_FEBLEND_MODE_LIGHTEN: number;
+    readonly SVG_FEBLEND_MODE_LUMINOSITY: number;
+    readonly SVG_FEBLEND_MODE_MULTIPLY: number;
+    readonly SVG_FEBLEND_MODE_NORMAL: number;
+    readonly SVG_FEBLEND_MODE_OVERLAY: number;
+    readonly SVG_FEBLEND_MODE_SATURATION: number;
+    readonly SVG_FEBLEND_MODE_SCREEN: number;
+    readonly SVG_FEBLEND_MODE_SOFT_LIGHT: number;
+    readonly SVG_FEBLEND_MODE_UNKNOWN: number;
+};
+
+interface SVGFEColorMatrixElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    readonly type: SVGAnimatedEnumeration;
+    readonly values: SVGAnimatedNumberList;
+    readonly SVG_FECOLORMATRIX_TYPE_HUEROTATE: number;
+    readonly SVG_FECOLORMATRIX_TYPE_LUMINANCETOALPHA: number;
+    readonly SVG_FECOLORMATRIX_TYPE_MATRIX: number;
+    readonly SVG_FECOLORMATRIX_TYPE_SATURATE: number;
+    readonly SVG_FECOLORMATRIX_TYPE_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEColorMatrixElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEColorMatrixElement: {
+    prototype: SVGFEColorMatrixElement;
+    new(): SVGFEColorMatrixElement;
+    readonly SVG_FECOLORMATRIX_TYPE_HUEROTATE: number;
+    readonly SVG_FECOLORMATRIX_TYPE_LUMINANCETOALPHA: number;
+    readonly SVG_FECOLORMATRIX_TYPE_MATRIX: number;
+    readonly SVG_FECOLORMATRIX_TYPE_SATURATE: number;
+    readonly SVG_FECOLORMATRIX_TYPE_UNKNOWN: number;
+};
+
+interface SVGFEComponentTransferElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEComponentTransferElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEComponentTransferElement: {
+    prototype: SVGFEComponentTransferElement;
+    new(): SVGFEComponentTransferElement;
+};
+
+interface SVGFECompositeElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    readonly in2: SVGAnimatedString;
+    readonly k1: SVGAnimatedNumber;
+    readonly k2: SVGAnimatedNumber;
+    readonly k3: SVGAnimatedNumber;
+    readonly k4: SVGAnimatedNumber;
+    readonly operator: SVGAnimatedEnumeration;
+    readonly SVG_FECOMPOSITE_OPERATOR_ARITHMETIC: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_ATOP: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_IN: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_OUT: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_OVER: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_UNKNOWN: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_XOR: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFECompositeElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFECompositeElement: {
+    prototype: SVGFECompositeElement;
+    new(): SVGFECompositeElement;
+    readonly SVG_FECOMPOSITE_OPERATOR_ARITHMETIC: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_ATOP: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_IN: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_OUT: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_OVER: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_UNKNOWN: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_XOR: number;
+};
+
+interface SVGFEConvolveMatrixElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly bias: SVGAnimatedNumber;
+    readonly divisor: SVGAnimatedNumber;
+    readonly edgeMode: SVGAnimatedEnumeration;
+    readonly in1: SVGAnimatedString;
+    readonly kernelMatrix: SVGAnimatedNumberList;
+    readonly kernelUnitLengthX: SVGAnimatedNumber;
+    readonly kernelUnitLengthY: SVGAnimatedNumber;
+    readonly orderX: SVGAnimatedInteger;
+    readonly orderY: SVGAnimatedInteger;
+    readonly preserveAlpha: SVGAnimatedBoolean;
+    readonly targetX: SVGAnimatedInteger;
+    readonly targetY: SVGAnimatedInteger;
+    readonly SVG_EDGEMODE_DUPLICATE: number;
+    readonly SVG_EDGEMODE_NONE: number;
+    readonly SVG_EDGEMODE_UNKNOWN: number;
+    readonly SVG_EDGEMODE_WRAP: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEConvolveMatrixElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEConvolveMatrixElement: {
+    prototype: SVGFEConvolveMatrixElement;
+    new(): SVGFEConvolveMatrixElement;
+    readonly SVG_EDGEMODE_DUPLICATE: number;
+    readonly SVG_EDGEMODE_NONE: number;
+    readonly SVG_EDGEMODE_UNKNOWN: number;
+    readonly SVG_EDGEMODE_WRAP: number;
+};
+
+interface SVGFEDiffuseLightingElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly diffuseConstant: SVGAnimatedNumber;
+    readonly in1: SVGAnimatedString;
+    readonly kernelUnitLengthX: SVGAnimatedNumber;
+    readonly kernelUnitLengthY: SVGAnimatedNumber;
+    readonly surfaceScale: SVGAnimatedNumber;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEDiffuseLightingElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEDiffuseLightingElement: {
+    prototype: SVGFEDiffuseLightingElement;
+    new(): SVGFEDiffuseLightingElement;
+};
+
+interface SVGFEDisplacementMapElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    readonly in2: SVGAnimatedString;
+    readonly scale: SVGAnimatedNumber;
+    readonly xChannelSelector: SVGAnimatedEnumeration;
+    readonly yChannelSelector: SVGAnimatedEnumeration;
+    readonly SVG_CHANNEL_A: number;
+    readonly SVG_CHANNEL_B: number;
+    readonly SVG_CHANNEL_G: number;
+    readonly SVG_CHANNEL_R: number;
+    readonly SVG_CHANNEL_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEDisplacementMapElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEDisplacementMapElement: {
+    prototype: SVGFEDisplacementMapElement;
+    new(): SVGFEDisplacementMapElement;
+    readonly SVG_CHANNEL_A: number;
+    readonly SVG_CHANNEL_B: number;
+    readonly SVG_CHANNEL_G: number;
+    readonly SVG_CHANNEL_R: number;
+    readonly SVG_CHANNEL_UNKNOWN: number;
+};
+
+interface SVGFEDistantLightElement extends SVGElement {
+    readonly azimuth: SVGAnimatedNumber;
+    readonly elevation: SVGAnimatedNumber;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEDistantLightElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEDistantLightElement: {
+    prototype: SVGFEDistantLightElement;
+    new(): SVGFEDistantLightElement;
+};
+
+interface SVGFEFloodElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEFloodElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEFloodElement: {
+    prototype: SVGFEFloodElement;
+    new(): SVGFEFloodElement;
+};
+
+interface SVGFEFuncAElement extends SVGComponentTransferFunctionElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEFuncAElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEFuncAElement: {
+    prototype: SVGFEFuncAElement;
+    new(): SVGFEFuncAElement;
+};
+
+interface SVGFEFuncBElement extends SVGComponentTransferFunctionElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEFuncBElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEFuncBElement: {
+    prototype: SVGFEFuncBElement;
+    new(): SVGFEFuncBElement;
+};
+
+interface SVGFEFuncGElement extends SVGComponentTransferFunctionElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEFuncGElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEFuncGElement: {
+    prototype: SVGFEFuncGElement;
+    new(): SVGFEFuncGElement;
+};
+
+interface SVGFEFuncRElement extends SVGComponentTransferFunctionElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEFuncRElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEFuncRElement: {
+    prototype: SVGFEFuncRElement;
+    new(): SVGFEFuncRElement;
+};
+
+interface SVGFEGaussianBlurElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    readonly stdDeviationX: SVGAnimatedNumber;
+    readonly stdDeviationY: SVGAnimatedNumber;
+    setStdDeviation(stdDeviationX: number, stdDeviationY: number): void;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEGaussianBlurElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEGaussianBlurElement: {
+    prototype: SVGFEGaussianBlurElement;
+    new(): SVGFEGaussianBlurElement;
+};
+
+interface SVGFEImageElement extends SVGElement, SVGFilterPrimitiveStandardAttributes, SVGURIReference {
+    readonly preserveAspectRatio: SVGAnimatedPreserveAspectRatio;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEImageElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEImageElement: {
+    prototype: SVGFEImageElement;
+    new(): SVGFEImageElement;
+};
+
+interface SVGFEMergeElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEMergeElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEMergeElement: {
+    prototype: SVGFEMergeElement;
+    new(): SVGFEMergeElement;
+};
+
+interface SVGFEMergeNodeElement extends SVGElement {
+    readonly in1: SVGAnimatedString;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEMergeNodeElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEMergeNodeElement: {
+    prototype: SVGFEMergeNodeElement;
+    new(): SVGFEMergeNodeElement;
+};
+
+interface SVGFEMorphologyElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    readonly operator: SVGAnimatedEnumeration;
+    readonly radiusX: SVGAnimatedNumber;
+    readonly radiusY: SVGAnimatedNumber;
+    readonly SVG_MORPHOLOGY_OPERATOR_DILATE: number;
+    readonly SVG_MORPHOLOGY_OPERATOR_ERODE: number;
+    readonly SVG_MORPHOLOGY_OPERATOR_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEMorphologyElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEMorphologyElement: {
+    prototype: SVGFEMorphologyElement;
+    new(): SVGFEMorphologyElement;
+    readonly SVG_MORPHOLOGY_OPERATOR_DILATE: number;
+    readonly SVG_MORPHOLOGY_OPERATOR_ERODE: number;
+    readonly SVG_MORPHOLOGY_OPERATOR_UNKNOWN: number;
+};
+
+interface SVGFEOffsetElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly dx: SVGAnimatedNumber;
+    readonly dy: SVGAnimatedNumber;
+    readonly in1: SVGAnimatedString;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEOffsetElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEOffsetElement: {
+    prototype: SVGFEOffsetElement;
+    new(): SVGFEOffsetElement;
+};
+
+interface SVGFEPointLightElement extends SVGElement {
+    readonly x: SVGAnimatedNumber;
+    readonly y: SVGAnimatedNumber;
+    readonly z: SVGAnimatedNumber;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEPointLightElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEPointLightElement: {
+    prototype: SVGFEPointLightElement;
+    new(): SVGFEPointLightElement;
+};
+
+interface SVGFESpecularLightingElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    readonly kernelUnitLengthX: SVGAnimatedNumber;
+    readonly kernelUnitLengthY: SVGAnimatedNumber;
+    readonly specularConstant: SVGAnimatedNumber;
+    readonly specularExponent: SVGAnimatedNumber;
+    readonly surfaceScale: SVGAnimatedNumber;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFESpecularLightingElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFESpecularLightingElement: {
+    prototype: SVGFESpecularLightingElement;
+    new(): SVGFESpecularLightingElement;
+};
+
+interface SVGFESpotLightElement extends SVGElement {
+    readonly limitingConeAngle: SVGAnimatedNumber;
+    readonly pointsAtX: SVGAnimatedNumber;
+    readonly pointsAtY: SVGAnimatedNumber;
+    readonly pointsAtZ: SVGAnimatedNumber;
+    readonly specularExponent: SVGAnimatedNumber;
+    readonly x: SVGAnimatedNumber;
+    readonly y: SVGAnimatedNumber;
+    readonly z: SVGAnimatedNumber;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFESpotLightElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFESpotLightElement: {
+    prototype: SVGFESpotLightElement;
+    new(): SVGFESpotLightElement;
+};
+
+interface SVGFETileElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFETileElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFETileElement: {
+    prototype: SVGFETileElement;
+    new(): SVGFETileElement;
+};
+
+interface SVGFETurbulenceElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly baseFrequencyX: SVGAnimatedNumber;
+    readonly baseFrequencyY: SVGAnimatedNumber;
+    readonly numOctaves: SVGAnimatedInteger;
+    readonly seed: SVGAnimatedNumber;
+    readonly stitchTiles: SVGAnimatedEnumeration;
+    readonly type: SVGAnimatedEnumeration;
+    readonly SVG_STITCHTYPE_NOSTITCH: number;
+    readonly SVG_STITCHTYPE_STITCH: number;
+    readonly SVG_STITCHTYPE_UNKNOWN: number;
+    readonly SVG_TURBULENCE_TYPE_FRACTALNOISE: number;
+    readonly SVG_TURBULENCE_TYPE_TURBULENCE: number;
+    readonly SVG_TURBULENCE_TYPE_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFETurbulenceElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFETurbulenceElement: {
+    prototype: SVGFETurbulenceElement;
+    new(): SVGFETurbulenceElement;
+    readonly SVG_STITCHTYPE_NOSTITCH: number;
+    readonly SVG_STITCHTYPE_STITCH: number;
+    readonly SVG_STITCHTYPE_UNKNOWN: number;
+    readonly SVG_TURBULENCE_TYPE_FRACTALNOISE: number;
+    readonly SVG_TURBULENCE_TYPE_TURBULENCE: number;
+    readonly SVG_TURBULENCE_TYPE_UNKNOWN: number;
+};
+
+interface SVGFilterElement extends SVGElement, SVGUnitTypes, SVGURIReference {
+    readonly filterResX: SVGAnimatedInteger;
+    readonly filterResY: SVGAnimatedInteger;
+    readonly filterUnits: SVGAnimatedEnumeration;
+    readonly height: SVGAnimatedLength;
+    readonly primitiveUnits: SVGAnimatedEnumeration;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+    setFilterRes(filterResX: number, filterResY: number): void;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFilterElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFilterElement: {
+    prototype: SVGFilterElement;
+    new(): SVGFilterElement;
+};
+
+interface SVGForeignObjectElement extends SVGGraphicsElement {
+    readonly height: SVGAnimatedLength;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGForeignObjectElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGForeignObjectElement: {
+    prototype: SVGForeignObjectElement;
+    new(): SVGForeignObjectElement;
+};
+
+interface SVGGElement extends SVGGraphicsElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGGElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGGElement: {
+    prototype: SVGGElement;
+    new(): SVGGElement;
+};
+
+interface SVGGradientElement extends SVGElement, SVGUnitTypes, SVGURIReference {
+    readonly gradientTransform: SVGAnimatedTransformList;
+    readonly gradientUnits: SVGAnimatedEnumeration;
+    readonly spreadMethod: SVGAnimatedEnumeration;
+    readonly SVG_SPREADMETHOD_PAD: number;
+    readonly SVG_SPREADMETHOD_REFLECT: number;
+    readonly SVG_SPREADMETHOD_REPEAT: number;
+    readonly SVG_SPREADMETHOD_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGGradientElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGGradientElement: {
+    prototype: SVGGradientElement;
+    new(): SVGGradientElement;
+    readonly SVG_SPREADMETHOD_PAD: number;
+    readonly SVG_SPREADMETHOD_REFLECT: number;
+    readonly SVG_SPREADMETHOD_REPEAT: number;
+    readonly SVG_SPREADMETHOD_UNKNOWN: number;
+};
+
+interface SVGGraphicsElement extends SVGElement, SVGTests {
+    readonly farthestViewportElement: SVGElement;
+    readonly nearestViewportElement: SVGElement;
+    readonly transform: SVGAnimatedTransformList;
+    getBBox(): SVGRect;
+    getCTM(): SVGMatrix;
+    getScreenCTM(): SVGMatrix;
+    getTransformToElement(element: SVGElement): SVGMatrix;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGGraphicsElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGGraphicsElement: {
+    prototype: SVGGraphicsElement;
+    new(): SVGGraphicsElement;
+};
+
+interface SVGImageElement extends SVGGraphicsElement, SVGURIReference {
+    readonly height: SVGAnimatedLength;
+    readonly preserveAspectRatio: SVGAnimatedPreserveAspectRatio;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGImageElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGImageElement: {
+    prototype: SVGImageElement;
+    new(): SVGImageElement;
+};
+
+interface SVGLength {
+    readonly unitType: number;
+    value: number;
+    valueAsString: string;
+    valueInSpecifiedUnits: number;
+    convertToSpecifiedUnits(unitType: number): void;
+    newValueSpecifiedUnits(unitType: number, valueInSpecifiedUnits: number): void;
+    readonly SVG_LENGTHTYPE_CM: number;
+    readonly SVG_LENGTHTYPE_EMS: number;
+    readonly SVG_LENGTHTYPE_EXS: number;
+    readonly SVG_LENGTHTYPE_IN: number;
+    readonly SVG_LENGTHTYPE_MM: number;
+    readonly SVG_LENGTHTYPE_NUMBER: number;
+    readonly SVG_LENGTHTYPE_PC: number;
+    readonly SVG_LENGTHTYPE_PERCENTAGE: number;
+    readonly SVG_LENGTHTYPE_PT: number;
+    readonly SVG_LENGTHTYPE_PX: number;
+    readonly SVG_LENGTHTYPE_UNKNOWN: number;
+}
+
+declare var SVGLength: {
+    prototype: SVGLength;
+    new(): SVGLength;
+    readonly SVG_LENGTHTYPE_CM: number;
+    readonly SVG_LENGTHTYPE_EMS: number;
+    readonly SVG_LENGTHTYPE_EXS: number;
+    readonly SVG_LENGTHTYPE_IN: number;
+    readonly SVG_LENGTHTYPE_MM: number;
+    readonly SVG_LENGTHTYPE_NUMBER: number;
+    readonly SVG_LENGTHTYPE_PC: number;
+    readonly SVG_LENGTHTYPE_PERCENTAGE: number;
+    readonly SVG_LENGTHTYPE_PT: number;
+    readonly SVG_LENGTHTYPE_PX: number;
+    readonly SVG_LENGTHTYPE_UNKNOWN: number;
+};
+
+interface SVGLengthList {
+    readonly numberOfItems: number;
+    appendItem(newItem: SVGLength): SVGLength;
+    clear(): void;
+    getItem(index: number): SVGLength;
+    initialize(newItem: SVGLength): SVGLength;
+    insertItemBefore(newItem: SVGLength, index: number): SVGLength;
+    removeItem(index: number): SVGLength;
+    replaceItem(newItem: SVGLength, index: number): SVGLength;
+}
+
+declare var SVGLengthList: {
+    prototype: SVGLengthList;
+    new(): SVGLengthList;
+};
+
+interface SVGLinearGradientElement extends SVGGradientElement {
+    readonly x1: SVGAnimatedLength;
+    readonly x2: SVGAnimatedLength;
+    readonly y1: SVGAnimatedLength;
+    readonly y2: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGLinearGradientElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGLinearGradientElement: {
+    prototype: SVGLinearGradientElement;
+    new(): SVGLinearGradientElement;
+};
+
+interface SVGLineElement extends SVGGraphicsElement {
+    readonly x1: SVGAnimatedLength;
+    readonly x2: SVGAnimatedLength;
+    readonly y1: SVGAnimatedLength;
+    readonly y2: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGLineElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGLineElement: {
+    prototype: SVGLineElement;
+    new(): SVGLineElement;
+};
+
+interface SVGMarkerElement extends SVGElement, SVGFitToViewBox {
+    readonly markerHeight: SVGAnimatedLength;
+    readonly markerUnits: SVGAnimatedEnumeration;
+    readonly markerWidth: SVGAnimatedLength;
+    readonly orientAngle: SVGAnimatedAngle;
+    readonly orientType: SVGAnimatedEnumeration;
+    readonly refX: SVGAnimatedLength;
+    readonly refY: SVGAnimatedLength;
+    setOrientToAngle(angle: SVGAngle): void;
+    setOrientToAuto(): void;
+    readonly SVG_MARKER_ORIENT_ANGLE: number;
+    readonly SVG_MARKER_ORIENT_AUTO: number;
+    readonly SVG_MARKER_ORIENT_UNKNOWN: number;
+    readonly SVG_MARKERUNITS_STROKEWIDTH: number;
+    readonly SVG_MARKERUNITS_UNKNOWN: number;
+    readonly SVG_MARKERUNITS_USERSPACEONUSE: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGMarkerElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGMarkerElement: {
+    prototype: SVGMarkerElement;
+    new(): SVGMarkerElement;
+    readonly SVG_MARKER_ORIENT_ANGLE: number;
+    readonly SVG_MARKER_ORIENT_AUTO: number;
+    readonly SVG_MARKER_ORIENT_UNKNOWN: number;
+    readonly SVG_MARKERUNITS_STROKEWIDTH: number;
+    readonly SVG_MARKERUNITS_UNKNOWN: number;
+    readonly SVG_MARKERUNITS_USERSPACEONUSE: number;
+};
+
+interface SVGMaskElement extends SVGElement, SVGTests, SVGUnitTypes {
+    readonly height: SVGAnimatedLength;
+    readonly maskContentUnits: SVGAnimatedEnumeration;
+    readonly maskUnits: SVGAnimatedEnumeration;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGMaskElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGMaskElement: {
+    prototype: SVGMaskElement;
+    new(): SVGMaskElement;
+};
+
+interface SVGMatrix {
+    a: number;
+    b: number;
+    c: number;
+    d: number;
+    e: number;
+    f: number;
+    flipX(): SVGMatrix;
+    flipY(): SVGMatrix;
+    inverse(): SVGMatrix;
+    multiply(secondMatrix: SVGMatrix): SVGMatrix;
+    rotate(angle: number): SVGMatrix;
+    rotateFromVector(x: number, y: number): SVGMatrix;
+    scale(scaleFactor: number): SVGMatrix;
+    scaleNonUniform(scaleFactorX: number, scaleFactorY: number): SVGMatrix;
+    skewX(angle: number): SVGMatrix;
+    skewY(angle: number): SVGMatrix;
+    translate(x: number, y: number): SVGMatrix;
+}
+
+declare var SVGMatrix: {
+    prototype: SVGMatrix;
+    new(): SVGMatrix;
+};
+
+interface SVGMetadataElement extends SVGElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGMetadataElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGMetadataElement: {
+    prototype: SVGMetadataElement;
+    new(): SVGMetadataElement;
+};
+
+interface SVGNumber {
+    value: number;
+}
+
+declare var SVGNumber: {
+    prototype: SVGNumber;
+    new(): SVGNumber;
+};
+
+interface SVGNumberList {
+    readonly numberOfItems: number;
+    appendItem(newItem: SVGNumber): SVGNumber;
+    clear(): void;
+    getItem(index: number): SVGNumber;
+    initialize(newItem: SVGNumber): SVGNumber;
+    insertItemBefore(newItem: SVGNumber, index: number): SVGNumber;
+    removeItem(index: number): SVGNumber;
+    replaceItem(newItem: SVGNumber, index: number): SVGNumber;
+}
+
+declare var SVGNumberList: {
+    prototype: SVGNumberList;
+    new(): SVGNumberList;
+};
+
+interface SVGPathElement extends SVGGraphicsElement {
+    readonly pathSegList: SVGPathSegList;
+    createSVGPathSegArcAbs(x: number, y: number, r1: number, r2: number, angle: number, largeArcFlag: boolean, sweepFlag: boolean): SVGPathSegArcAbs;
+    createSVGPathSegArcRel(x: number, y: number, r1: number, r2: number, angle: number, largeArcFlag: boolean, sweepFlag: boolean): SVGPathSegArcRel;
+    createSVGPathSegClosePath(): SVGPathSegClosePath;
+    createSVGPathSegCurvetoCubicAbs(x: number, y: number, x1: number, y1: number, x2: number, y2: number): SVGPathSegCurvetoCubicAbs;
+    createSVGPathSegCurvetoCubicRel(x: number, y: number, x1: number, y1: number, x2: number, y2: number): SVGPathSegCurvetoCubicRel;
+    createSVGPathSegCurvetoCubicSmoothAbs(x: number, y: number, x2: number, y2: number): SVGPathSegCurvetoCubicSmoothAbs;
+    createSVGPathSegCurvetoCubicSmoothRel(x: number, y: number, x2: number, y2: number): SVGPathSegCurvetoCubicSmoothRel;
+    createSVGPathSegCurvetoQuadraticAbs(x: number, y: number, x1: number, y1: number): SVGPathSegCurvetoQuadraticAbs;
+    createSVGPathSegCurvetoQuadraticRel(x: number, y: number, x1: number, y1: number): SVGPathSegCurvetoQuadraticRel;
+    createSVGPathSegCurvetoQuadraticSmoothAbs(x: number, y: number): SVGPathSegCurvetoQuadraticSmoothAbs;
+    createSVGPathSegCurvetoQuadraticSmoothRel(x: number, y: number): SVGPathSegCurvetoQuadraticSmoothRel;
+    createSVGPathSegLinetoAbs(x: number, y: number): SVGPathSegLinetoAbs;
+    createSVGPathSegLinetoHorizontalAbs(x: number): SVGPathSegLinetoHorizontalAbs;
+    createSVGPathSegLinetoHorizontalRel(x: number): SVGPathSegLinetoHorizontalRel;
+    createSVGPathSegLinetoRel(x: number, y: number): SVGPathSegLinetoRel;
+    createSVGPathSegLinetoVerticalAbs(y: number): SVGPathSegLinetoVerticalAbs;
+    createSVGPathSegLinetoVerticalRel(y: number): SVGPathSegLinetoVerticalRel;
+    createSVGPathSegMovetoAbs(x: number, y: number): SVGPathSegMovetoAbs;
+    createSVGPathSegMovetoRel(x: number, y: number): SVGPathSegMovetoRel;
+    getPathSegAtLength(distance: number): number;
+    getPointAtLength(distance: number): SVGPoint;
+    getTotalLength(): number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGPathElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGPathElement: {
+    prototype: SVGPathElement;
+    new(): SVGPathElement;
+};
+
+interface SVGPathSeg {
+    readonly pathSegType: number;
+    readonly pathSegTypeAsLetter: string;
+    readonly PATHSEG_ARC_ABS: number;
+    readonly PATHSEG_ARC_REL: number;
+    readonly PATHSEG_CLOSEPATH: number;
+    readonly PATHSEG_CURVETO_CUBIC_ABS: number;
+    readonly PATHSEG_CURVETO_CUBIC_REL: number;
+    readonly PATHSEG_CURVETO_CUBIC_SMOOTH_ABS: number;
+    readonly PATHSEG_CURVETO_CUBIC_SMOOTH_REL: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_ABS: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_REL: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_SMOOTH_ABS: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_SMOOTH_REL: number;
+    readonly PATHSEG_LINETO_ABS: number;
+    readonly PATHSEG_LINETO_HORIZONTAL_ABS: number;
+    readonly PATHSEG_LINETO_HORIZONTAL_REL: number;
+    readonly PATHSEG_LINETO_REL: number;
+    readonly PATHSEG_LINETO_VERTICAL_ABS: number;
+    readonly PATHSEG_LINETO_VERTICAL_REL: number;
+    readonly PATHSEG_MOVETO_ABS: number;
+    readonly PATHSEG_MOVETO_REL: number;
+    readonly PATHSEG_UNKNOWN: number;
+}
+
+declare var SVGPathSeg: {
+    prototype: SVGPathSeg;
+    new(): SVGPathSeg;
+    readonly PATHSEG_ARC_ABS: number;
+    readonly PATHSEG_ARC_REL: number;
+    readonly PATHSEG_CLOSEPATH: number;
+    readonly PATHSEG_CURVETO_CUBIC_ABS: number;
+    readonly PATHSEG_CURVETO_CUBIC_REL: number;
+    readonly PATHSEG_CURVETO_CUBIC_SMOOTH_ABS: number;
+    readonly PATHSEG_CURVETO_CUBIC_SMOOTH_REL: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_ABS: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_REL: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_SMOOTH_ABS: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_SMOOTH_REL: number;
+    readonly PATHSEG_LINETO_ABS: number;
+    readonly PATHSEG_LINETO_HORIZONTAL_ABS: number;
+    readonly PATHSEG_LINETO_HORIZONTAL_REL: number;
+    readonly PATHSEG_LINETO_REL: number;
+    readonly PATHSEG_LINETO_VERTICAL_ABS: number;
+    readonly PATHSEG_LINETO_VERTICAL_REL: number;
+    readonly PATHSEG_MOVETO_ABS: number;
+    readonly PATHSEG_MOVETO_REL: number;
+    readonly PATHSEG_UNKNOWN: number;
+};
+
+interface SVGPathSegArcAbs extends SVGPathSeg {
+    angle: number;
+    largeArcFlag: boolean;
+    r1: number;
+    r2: number;
+    sweepFlag: boolean;
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegArcAbs: {
+    prototype: SVGPathSegArcAbs;
+    new(): SVGPathSegArcAbs;
+};
+
+interface SVGPathSegArcRel extends SVGPathSeg {
+    angle: number;
+    largeArcFlag: boolean;
+    r1: number;
+    r2: number;
+    sweepFlag: boolean;
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegArcRel: {
+    prototype: SVGPathSegArcRel;
+    new(): SVGPathSegArcRel;
+};
+
+interface SVGPathSegClosePath extends SVGPathSeg {
+}
+
+declare var SVGPathSegClosePath: {
+    prototype: SVGPathSegClosePath;
+    new(): SVGPathSegClosePath;
+};
+
+interface SVGPathSegCurvetoCubicAbs extends SVGPathSeg {
+    x: number;
+    x1: number;
+    x2: number;
+    y: number;
+    y1: number;
+    y2: number;
+}
+
+declare var SVGPathSegCurvetoCubicAbs: {
+    prototype: SVGPathSegCurvetoCubicAbs;
+    new(): SVGPathSegCurvetoCubicAbs;
+};
+
+interface SVGPathSegCurvetoCubicRel extends SVGPathSeg {
+    x: number;
+    x1: number;
+    x2: number;
+    y: number;
+    y1: number;
+    y2: number;
+}
+
+declare var SVGPathSegCurvetoCubicRel: {
+    prototype: SVGPathSegCurvetoCubicRel;
+    new(): SVGPathSegCurvetoCubicRel;
+};
+
+interface SVGPathSegCurvetoCubicSmoothAbs extends SVGPathSeg {
+    x: number;
+    x2: number;
+    y: number;
+    y2: number;
+}
+
+declare var SVGPathSegCurvetoCubicSmoothAbs: {
+    prototype: SVGPathSegCurvetoCubicSmoothAbs;
+    new(): SVGPathSegCurvetoCubicSmoothAbs;
+};
+
+interface SVGPathSegCurvetoCubicSmoothRel extends SVGPathSeg {
+    x: number;
+    x2: number;
+    y: number;
+    y2: number;
+}
+
+declare var SVGPathSegCurvetoCubicSmoothRel: {
+    prototype: SVGPathSegCurvetoCubicSmoothRel;
+    new(): SVGPathSegCurvetoCubicSmoothRel;
+};
+
+interface SVGPathSegCurvetoQuadraticAbs extends SVGPathSeg {
+    x: number;
+    x1: number;
+    y: number;
+    y1: number;
+}
+
+declare var SVGPathSegCurvetoQuadraticAbs: {
+    prototype: SVGPathSegCurvetoQuadraticAbs;
+    new(): SVGPathSegCurvetoQuadraticAbs;
+};
+
+interface SVGPathSegCurvetoQuadraticRel extends SVGPathSeg {
+    x: number;
+    x1: number;
+    y: number;
+    y1: number;
+}
+
+declare var SVGPathSegCurvetoQuadraticRel: {
+    prototype: SVGPathSegCurvetoQuadraticRel;
+    new(): SVGPathSegCurvetoQuadraticRel;
+};
+
+interface SVGPathSegCurvetoQuadraticSmoothAbs extends SVGPathSeg {
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegCurvetoQuadraticSmoothAbs: {
+    prototype: SVGPathSegCurvetoQuadraticSmoothAbs;
+    new(): SVGPathSegCurvetoQuadraticSmoothAbs;
+};
+
+interface SVGPathSegCurvetoQuadraticSmoothRel extends SVGPathSeg {
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegCurvetoQuadraticSmoothRel: {
+    prototype: SVGPathSegCurvetoQuadraticSmoothRel;
+    new(): SVGPathSegCurvetoQuadraticSmoothRel;
+};
+
+interface SVGPathSegLinetoAbs extends SVGPathSeg {
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegLinetoAbs: {
+    prototype: SVGPathSegLinetoAbs;
+    new(): SVGPathSegLinetoAbs;
+};
+
+interface SVGPathSegLinetoHorizontalAbs extends SVGPathSeg {
+    x: number;
+}
+
+declare var SVGPathSegLinetoHorizontalAbs: {
+    prototype: SVGPathSegLinetoHorizontalAbs;
+    new(): SVGPathSegLinetoHorizontalAbs;
+};
+
+interface SVGPathSegLinetoHorizontalRel extends SVGPathSeg {
+    x: number;
+}
+
+declare var SVGPathSegLinetoHorizontalRel: {
+    prototype: SVGPathSegLinetoHorizontalRel;
+    new(): SVGPathSegLinetoHorizontalRel;
+};
+
+interface SVGPathSegLinetoRel extends SVGPathSeg {
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegLinetoRel: {
+    prototype: SVGPathSegLinetoRel;
+    new(): SVGPathSegLinetoRel;
+};
+
+interface SVGPathSegLinetoVerticalAbs extends SVGPathSeg {
+    y: number;
+}
+
+declare var SVGPathSegLinetoVerticalAbs: {
+    prototype: SVGPathSegLinetoVerticalAbs;
+    new(): SVGPathSegLinetoVerticalAbs;
+};
+
+interface SVGPathSegLinetoVerticalRel extends SVGPathSeg {
+    y: number;
+}
+
+declare var SVGPathSegLinetoVerticalRel: {
+    prototype: SVGPathSegLinetoVerticalRel;
+    new(): SVGPathSegLinetoVerticalRel;
+};
+
+interface SVGPathSegList {
+    readonly numberOfItems: number;
+    appendItem(newItem: SVGPathSeg): SVGPathSeg;
+    clear(): void;
+    getItem(index: number): SVGPathSeg;
+    initialize(newItem: SVGPathSeg): SVGPathSeg;
+    insertItemBefore(newItem: SVGPathSeg, index: number): SVGPathSeg;
+    removeItem(index: number): SVGPathSeg;
+    replaceItem(newItem: SVGPathSeg, index: number): SVGPathSeg;
+}
+
+declare var SVGPathSegList: {
+    prototype: SVGPathSegList;
+    new(): SVGPathSegList;
+};
+
+interface SVGPathSegMovetoAbs extends SVGPathSeg {
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegMovetoAbs: {
+    prototype: SVGPathSegMovetoAbs;
+    new(): SVGPathSegMovetoAbs;
+};
+
+interface SVGPathSegMovetoRel extends SVGPathSeg {
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegMovetoRel: {
+    prototype: SVGPathSegMovetoRel;
+    new(): SVGPathSegMovetoRel;
+};
+
+interface SVGPatternElement extends SVGElement, SVGTests, SVGUnitTypes, SVGFitToViewBox, SVGURIReference {
+    readonly height: SVGAnimatedLength;
+    readonly patternContentUnits: SVGAnimatedEnumeration;
+    readonly patternTransform: SVGAnimatedTransformList;
+    readonly patternUnits: SVGAnimatedEnumeration;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGPatternElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGPatternElement: {
+    prototype: SVGPatternElement;
+    new(): SVGPatternElement;
+};
+
+interface SVGPoint {
+    x: number;
+    y: number;
+    matrixTransform(matrix: SVGMatrix): SVGPoint;
+}
+
+declare var SVGPoint: {
+    prototype: SVGPoint;
+    new(): SVGPoint;
+};
+
+interface SVGPointList {
+    readonly numberOfItems: number;
+    appendItem(newItem: SVGPoint): SVGPoint;
+    clear(): void;
+    getItem(index: number): SVGPoint;
+    initialize(newItem: SVGPoint): SVGPoint;
+    insertItemBefore(newItem: SVGPoint, index: number): SVGPoint;
+    removeItem(index: number): SVGPoint;
+    replaceItem(newItem: SVGPoint, index: number): SVGPoint;
+}
+
+declare var SVGPointList: {
+    prototype: SVGPointList;
+    new(): SVGPointList;
+};
+
+interface SVGPolygonElement extends SVGGraphicsElement, SVGAnimatedPoints {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGPolygonElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGPolygonElement: {
+    prototype: SVGPolygonElement;
+    new(): SVGPolygonElement;
+};
+
+interface SVGPolylineElement extends SVGGraphicsElement, SVGAnimatedPoints {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGPolylineElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGPolylineElement: {
+    prototype: SVGPolylineElement;
+    new(): SVGPolylineElement;
+};
+
+interface SVGPreserveAspectRatio {
+    align: number;
+    meetOrSlice: number;
+    readonly SVG_MEETORSLICE_MEET: number;
+    readonly SVG_MEETORSLICE_SLICE: number;
+    readonly SVG_MEETORSLICE_UNKNOWN: number;
+    readonly SVG_PRESERVEASPECTRATIO_NONE: number;
+    readonly SVG_PRESERVEASPECTRATIO_UNKNOWN: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMAXYMAX: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMAXYMID: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMAXYMIN: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMIDYMAX: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMIDYMID: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMIDYMIN: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMINYMAX: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMINYMID: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMINYMIN: number;
+}
+
+declare var SVGPreserveAspectRatio: {
+    prototype: SVGPreserveAspectRatio;
+    new(): SVGPreserveAspectRatio;
+    readonly SVG_MEETORSLICE_MEET: number;
+    readonly SVG_MEETORSLICE_SLICE: number;
+    readonly SVG_MEETORSLICE_UNKNOWN: number;
+    readonly SVG_PRESERVEASPECTRATIO_NONE: number;
+    readonly SVG_PRESERVEASPECTRATIO_UNKNOWN: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMAXYMAX: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMAXYMID: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMAXYMIN: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMIDYMAX: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMIDYMID: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMIDYMIN: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMINYMAX: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMINYMID: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMINYMIN: number;
+};
+
+interface SVGRadialGradientElement extends SVGGradientElement {
+    readonly cx: SVGAnimatedLength;
+    readonly cy: SVGAnimatedLength;
+    readonly fx: SVGAnimatedLength;
+    readonly fy: SVGAnimatedLength;
+    readonly r: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGRadialGradientElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGRadialGradientElement: {
+    prototype: SVGRadialGradientElement;
+    new(): SVGRadialGradientElement;
+};
+
+interface SVGRect {
+    height: number;
+    width: number;
+    x: number;
+    y: number;
+}
+
+declare var SVGRect: {
+    prototype: SVGRect;
+    new(): SVGRect;
+};
+
+interface SVGRectElement extends SVGGraphicsElement {
+    readonly height: SVGAnimatedLength;
+    readonly rx: SVGAnimatedLength;
+    readonly ry: SVGAnimatedLength;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGRectElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGRectElement: {
+    prototype: SVGRectElement;
+    new(): SVGRectElement;
+};
+
+interface SVGScriptElement extends SVGElement, SVGURIReference {
+    type: string;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGScriptElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGScriptElement: {
+    prototype: SVGScriptElement;
+    new(): SVGScriptElement;
+};
+
+interface SVGStopElement extends SVGElement {
+    readonly offset: SVGAnimatedNumber;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGStopElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGStopElement: {
+    prototype: SVGStopElement;
+    new(): SVGStopElement;
+};
+
+interface SVGStringList {
+    readonly numberOfItems: number;
+    appendItem(newItem: string): string;
+    clear(): void;
+    getItem(index: number): string;
+    initialize(newItem: string): string;
+    insertItemBefore(newItem: string, index: number): string;
+    removeItem(index: number): string;
+    replaceItem(newItem: string, index: number): string;
+}
+
+declare var SVGStringList: {
+    prototype: SVGStringList;
+    new(): SVGStringList;
+};
+
+interface SVGStyleElement extends SVGElement {
+    disabled: boolean;
+    media: string;
+    title: string;
+    type: string;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGStyleElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGStyleElement: {
+    prototype: SVGStyleElement;
+    new(): SVGStyleElement;
+};
+
+interface SVGSVGElementEventMap extends SVGElementEventMap {
+    "SVGAbort": Event;
+    "SVGError": Event;
+    "resize": UIEvent;
+    "scroll": UIEvent;
+    "SVGUnload": Event;
+    "SVGZoom": SVGZoomEvent;
+}
+
+interface SVGSVGElement extends SVGGraphicsElement, DocumentEvent, SVGFitToViewBox, SVGZoomAndPan {
+    contentScriptType: string;
+    contentStyleType: string;
+    currentScale: number;
+    readonly currentTranslate: SVGPoint;
+    readonly height: SVGAnimatedLength;
+    onabort: (this: SVGSVGElement, ev: Event) => any;
+    onerror: (this: SVGSVGElement, ev: Event) => any;
+    onresize: (this: SVGSVGElement, ev: UIEvent) => any;
+    onscroll: (this: SVGSVGElement, ev: UIEvent) => any;
+    onunload: (this: SVGSVGElement, ev: Event) => any;
+    onzoom: (this: SVGSVGElement, ev: SVGZoomEvent) => any;
+    readonly pixelUnitToMillimeterX: number;
+    readonly pixelUnitToMillimeterY: number;
+    readonly screenPixelToMillimeterX: number;
+    readonly screenPixelToMillimeterY: number;
+    readonly viewport: SVGRect;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+    checkEnclosure(element: SVGElement, rect: SVGRect): boolean;
+    checkIntersection(element: SVGElement, rect: SVGRect): boolean;
+    createSVGAngle(): SVGAngle;
+    createSVGLength(): SVGLength;
+    createSVGMatrix(): SVGMatrix;
+    createSVGNumber(): SVGNumber;
+    createSVGPoint(): SVGPoint;
+    createSVGRect(): SVGRect;
+    createSVGTransform(): SVGTransform;
+    createSVGTransformFromMatrix(matrix: SVGMatrix): SVGTransform;
+    deselectAll(): void;
+    forceRedraw(): void;
+    getComputedStyle(elt: Element, pseudoElt?: string): CSSStyleDeclaration;
+    getCurrentTime(): number;
+    getElementById(elementId: string): Element;
+    getEnclosureList(rect: SVGRect, referenceElement: SVGElement): NodeListOf<SVGCircleElement | SVGEllipseElement | SVGImageElement | SVGLineElement | SVGPathElement | SVGPolygonElement | SVGPolylineElement | SVGRectElement | SVGTextElement | SVGUseElement>;
+    getIntersectionList(rect: SVGRect, referenceElement: SVGElement): NodeListOf<SVGCircleElement | SVGEllipseElement | SVGImageElement | SVGLineElement | SVGPathElement | SVGPolygonElement | SVGPolylineElement | SVGRectElement | SVGTextElement | SVGUseElement>;
+    pauseAnimations(): void;
+    setCurrentTime(seconds: number): void;
+    suspendRedraw(maxWaitMilliseconds: number): number;
+    unpauseAnimations(): void;
+    unsuspendRedraw(suspendHandleID: number): void;
+    unsuspendRedrawAll(): void;
+    addEventListener<K extends keyof SVGSVGElementEventMap>(type: K, listener: (this: SVGSVGElement, ev: SVGSVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGSVGElement: {
+    prototype: SVGSVGElement;
+    new(): SVGSVGElement;
+};
+
+interface SVGSwitchElement extends SVGGraphicsElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGSwitchElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGSwitchElement: {
+    prototype: SVGSwitchElement;
+    new(): SVGSwitchElement;
+};
+
+interface SVGSymbolElement extends SVGElement, SVGFitToViewBox {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGSymbolElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGSymbolElement: {
+    prototype: SVGSymbolElement;
+    new(): SVGSymbolElement;
+};
+
+interface SVGTextContentElement extends SVGGraphicsElement {
+    readonly lengthAdjust: SVGAnimatedEnumeration;
+    readonly textLength: SVGAnimatedLength;
+    getCharNumAtPosition(point: SVGPoint): number;
+    getComputedTextLength(): number;
+    getEndPositionOfChar(charnum: number): SVGPoint;
+    getExtentOfChar(charnum: number): SVGRect;
+    getNumberOfChars(): number;
+    getRotationOfChar(charnum: number): number;
+    getStartPositionOfChar(charnum: number): SVGPoint;
+    getSubStringLength(charnum: number, nchars: number): number;
+    selectSubString(charnum: number, nchars: number): void;
+    readonly LENGTHADJUST_SPACING: number;
+    readonly LENGTHADJUST_SPACINGANDGLYPHS: number;
+    readonly LENGTHADJUST_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGTextContentElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGTextContentElement: {
+    prototype: SVGTextContentElement;
+    new(): SVGTextContentElement;
+    readonly LENGTHADJUST_SPACING: number;
+    readonly LENGTHADJUST_SPACINGANDGLYPHS: number;
+    readonly LENGTHADJUST_UNKNOWN: number;
+};
+
+interface SVGTextElement extends SVGTextPositioningElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGTextElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGTextElement: {
+    prototype: SVGTextElement;
+    new(): SVGTextElement;
+};
+
+interface SVGTextPathElement extends SVGTextContentElement, SVGURIReference {
+    readonly method: SVGAnimatedEnumeration;
+    readonly spacing: SVGAnimatedEnumeration;
+    readonly startOffset: SVGAnimatedLength;
+    readonly TEXTPATH_METHODTYPE_ALIGN: number;
+    readonly TEXTPATH_METHODTYPE_STRETCH: number;
+    readonly TEXTPATH_METHODTYPE_UNKNOWN: number;
+    readonly TEXTPATH_SPACINGTYPE_AUTO: number;
+    readonly TEXTPATH_SPACINGTYPE_EXACT: number;
+    readonly TEXTPATH_SPACINGTYPE_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGTextPathElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGTextPathElement: {
+    prototype: SVGTextPathElement;
+    new(): SVGTextPathElement;
+    readonly TEXTPATH_METHODTYPE_ALIGN: number;
+    readonly TEXTPATH_METHODTYPE_STRETCH: number;
+    readonly TEXTPATH_METHODTYPE_UNKNOWN: number;
+    readonly TEXTPATH_SPACINGTYPE_AUTO: number;
+    readonly TEXTPATH_SPACINGTYPE_EXACT: number;
+    readonly TEXTPATH_SPACINGTYPE_UNKNOWN: number;
+};
+
+interface SVGTextPositioningElement extends SVGTextContentElement {
+    readonly dx: SVGAnimatedLengthList;
+    readonly dy: SVGAnimatedLengthList;
+    readonly rotate: SVGAnimatedNumberList;
+    readonly x: SVGAnimatedLengthList;
+    readonly y: SVGAnimatedLengthList;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGTextPositioningElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGTextPositioningElement: {
+    prototype: SVGTextPositioningElement;
+    new(): SVGTextPositioningElement;
+};
+
+interface SVGTitleElement extends SVGElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGTitleElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGTitleElement: {
+    prototype: SVGTitleElement;
+    new(): SVGTitleElement;
+};
+
+interface SVGTransform {
+    readonly angle: number;
+    readonly matrix: SVGMatrix;
+    readonly type: number;
+    setMatrix(matrix: SVGMatrix): void;
+    setRotate(angle: number, cx: number, cy: number): void;
+    setScale(sx: number, sy: number): void;
+    setSkewX(angle: number): void;
+    setSkewY(angle: number): void;
+    setTranslate(tx: number, ty: number): void;
+    readonly SVG_TRANSFORM_MATRIX: number;
+    readonly SVG_TRANSFORM_ROTATE: number;
+    readonly SVG_TRANSFORM_SCALE: number;
+    readonly SVG_TRANSFORM_SKEWX: number;
+    readonly SVG_TRANSFORM_SKEWY: number;
+    readonly SVG_TRANSFORM_TRANSLATE: number;
+    readonly SVG_TRANSFORM_UNKNOWN: number;
+}
+
+declare var SVGTransform: {
+    prototype: SVGTransform;
+    new(): SVGTransform;
+    readonly SVG_TRANSFORM_MATRIX: number;
+    readonly SVG_TRANSFORM_ROTATE: number;
+    readonly SVG_TRANSFORM_SCALE: number;
+    readonly SVG_TRANSFORM_SKEWX: number;
+    readonly SVG_TRANSFORM_SKEWY: number;
+    readonly SVG_TRANSFORM_TRANSLATE: number;
+    readonly SVG_TRANSFORM_UNKNOWN: number;
+};
+
+interface SVGTransformList {
+    readonly numberOfItems: number;
+    appendItem(newItem: SVGTransform): SVGTransform;
+    clear(): void;
+    consolidate(): SVGTransform;
+    createSVGTransformFromMatrix(matrix: SVGMatrix): SVGTransform;
+    getItem(index: number): SVGTransform;
+    initialize(newItem: SVGTransform): SVGTransform;
+    insertItemBefore(newItem: SVGTransform, index: number): SVGTransform;
+    removeItem(index: number): SVGTransform;
+    replaceItem(newItem: SVGTransform, index: number): SVGTransform;
+}
+
+declare var SVGTransformList: {
+    prototype: SVGTransformList;
+    new(): SVGTransformList;
+};
+
+interface SVGTSpanElement extends SVGTextPositioningElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGTSpanElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGTSpanElement: {
+    prototype: SVGTSpanElement;
+    new(): SVGTSpanElement;
+};
+
+interface SVGUnitTypes {
+    readonly SVG_UNIT_TYPE_OBJECTBOUNDINGBOX: number;
+    readonly SVG_UNIT_TYPE_UNKNOWN: number;
+    readonly SVG_UNIT_TYPE_USERSPACEONUSE: number;
+}
+declare var SVGUnitTypes: SVGUnitTypes;
+
+interface SVGUseElement extends SVGGraphicsElement, SVGURIReference {
+    readonly animatedInstanceRoot: SVGElementInstance;
+    readonly height: SVGAnimatedLength;
+    readonly instanceRoot: SVGElementInstance;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGUseElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGUseElement: {
+    prototype: SVGUseElement;
+    new(): SVGUseElement;
+};
+
+interface SVGViewElement extends SVGElement, SVGZoomAndPan, SVGFitToViewBox {
+    readonly viewTarget: SVGStringList;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGViewElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGViewElement: {
+    prototype: SVGViewElement;
+    new(): SVGViewElement;
+};
+
+interface SVGZoomAndPan {
+    readonly zoomAndPan: number;
+}
+
+declare var SVGZoomAndPan: {
+    readonly SVG_ZOOMANDPAN_DISABLE: number;
+    readonly SVG_ZOOMANDPAN_MAGNIFY: number;
+    readonly SVG_ZOOMANDPAN_UNKNOWN: number;
+};
+
+interface SVGZoomEvent extends UIEvent {
+    readonly newScale: number;
+    readonly newTranslate: SVGPoint;
+    readonly previousScale: number;
+    readonly previousTranslate: SVGPoint;
+    readonly zoomRectScreen: SVGRect;
+}
+
+declare var SVGZoomEvent: {
+    prototype: SVGZoomEvent;
+    new(): SVGZoomEvent;
+};
+
+interface SyncManager {
+    getTags(): any;
+    register(tag: string): Promise<void>;
+}
+
+declare var SyncManager: {
+    prototype: SyncManager;
+    new(): SyncManager;
+};
+
+interface Text extends CharacterData {
+    readonly wholeText: string;
+    readonly assignedSlot: HTMLSlotElement | null;
+    splitText(offset: number): Text;
+}
+
+declare var Text: {
+    prototype: Text;
+    new(data?: string): Text;
+};
+
+interface TextEvent extends UIEvent {
+    readonly data: string;
+    readonly inputMethod: number;
+    readonly locale: string;
+    initTextEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, dataArg: string, inputMethod: number, locale: string): void;
+    readonly DOM_INPUT_METHOD_DROP: number;
+    readonly DOM_INPUT_METHOD_HANDWRITING: number;
+    readonly DOM_INPUT_METHOD_IME: number;
+    readonly DOM_INPUT_METHOD_KEYBOARD: number;
+    readonly DOM_INPUT_METHOD_MULTIMODAL: number;
+    readonly DOM_INPUT_METHOD_OPTION: number;
+    readonly DOM_INPUT_METHOD_PASTE: number;
+    readonly DOM_INPUT_METHOD_SCRIPT: number;
+    readonly DOM_INPUT_METHOD_UNKNOWN: number;
+    readonly DOM_INPUT_METHOD_VOICE: number;
+}
+
+declare var TextEvent: {
+    prototype: TextEvent;
+    new(): TextEvent;
+    readonly DOM_INPUT_METHOD_DROP: number;
+    readonly DOM_INPUT_METHOD_HANDWRITING: number;
+    readonly DOM_INPUT_METHOD_IME: number;
+    readonly DOM_INPUT_METHOD_KEYBOARD: number;
+    readonly DOM_INPUT_METHOD_MULTIMODAL: number;
+    readonly DOM_INPUT_METHOD_OPTION: number;
+    readonly DOM_INPUT_METHOD_PASTE: number;
+    readonly DOM_INPUT_METHOD_SCRIPT: number;
+    readonly DOM_INPUT_METHOD_UNKNOWN: number;
+    readonly DOM_INPUT_METHOD_VOICE: number;
+};
+
+interface TextMetrics {
+    readonly width: number;
+}
+
+declare var TextMetrics: {
+    prototype: TextMetrics;
+    new(): TextMetrics;
+};
+
+interface TextTrackEventMap {
+    "cuechange": Event;
+    "error": Event;
+    "load": Event;
+}
+
+interface TextTrack extends EventTarget {
+    readonly activeCues: TextTrackCueList;
+    readonly cues: TextTrackCueList;
+    readonly inBandMetadataTrackDispatchType: string;
+    readonly kind: string;
+    readonly label: string;
+    readonly language: string;
+    mode: any;
+    oncuechange: (this: TextTrack, ev: Event) => any;
+    onerror: (this: TextTrack, ev: Event) => any;
+    onload: (this: TextTrack, ev: Event) => any;
+    readonly readyState: number;
+    addCue(cue: TextTrackCue): void;
+    removeCue(cue: TextTrackCue): void;
+    readonly DISABLED: number;
+    readonly ERROR: number;
+    readonly HIDDEN: number;
+    readonly LOADED: number;
+    readonly LOADING: number;
+    readonly NONE: number;
+    readonly SHOWING: number;
+    addEventListener<K extends keyof TextTrackEventMap>(type: K, listener: (this: TextTrack, ev: TextTrackEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var TextTrack: {
+    prototype: TextTrack;
+    new(): TextTrack;
+    readonly DISABLED: number;
+    readonly ERROR: number;
+    readonly HIDDEN: number;
+    readonly LOADED: number;
+    readonly LOADING: number;
+    readonly NONE: number;
+    readonly SHOWING: number;
+};
+
+interface TextTrackCueEventMap {
+    "enter": Event;
+    "exit": Event;
+}
+
+interface TextTrackCue extends EventTarget {
+    endTime: number;
+    id: string;
+    onenter: (this: TextTrackCue, ev: Event) => any;
+    onexit: (this: TextTrackCue, ev: Event) => any;
+    pauseOnExit: boolean;
+    startTime: number;
+    text: string;
+    readonly track: TextTrack;
+    getCueAsHTML(): DocumentFragment;
+    addEventListener<K extends keyof TextTrackCueEventMap>(type: K, listener: (this: TextTrackCue, ev: TextTrackCueEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var TextTrackCue: {
+    prototype: TextTrackCue;
+    new(startTime: number, endTime: number, text: string): TextTrackCue;
+};
+
+interface TextTrackCueList {
+    readonly length: number;
+    getCueById(id: string): TextTrackCue;
+    item(index: number): TextTrackCue;
+    [index: number]: TextTrackCue;
+}
+
+declare var TextTrackCueList: {
+    prototype: TextTrackCueList;
+    new(): TextTrackCueList;
+};
+
+interface TextTrackListEventMap {
+    "addtrack": TrackEvent;
+}
+
+interface TextTrackList extends EventTarget {
+    readonly length: number;
+    onaddtrack: ((this: TextTrackList, ev: TrackEvent) => any) | null;
+    item(index: number): TextTrack;
+    addEventListener<K extends keyof TextTrackListEventMap>(type: K, listener: (this: TextTrackList, ev: TextTrackListEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+    [index: number]: TextTrack;
+}
+
+declare var TextTrackList: {
+    prototype: TextTrackList;
+    new(): TextTrackList;
+};
+
+interface TimeRanges {
+    readonly length: number;
+    end(index: number): number;
+    start(index: number): number;
+}
+
+declare var TimeRanges: {
+    prototype: TimeRanges;
+    new(): TimeRanges;
+};
+
+interface Touch {
+    readonly clientX: number;
+    readonly clientY: number;
+    readonly identifier: number;
+    readonly pageX: number;
+    readonly pageY: number;
+    readonly screenX: number;
+    readonly screenY: number;
+    readonly target: EventTarget;
+}
+
+declare var Touch: {
+    prototype: Touch;
+    new(): Touch;
+};
+
+interface TouchEvent extends UIEvent {
+    readonly altKey: boolean;
+    readonly changedTouches: TouchList;
+    readonly charCode: number;
+    readonly ctrlKey: boolean;
+    readonly keyCode: number;
+    readonly metaKey: boolean;
+    readonly shiftKey: boolean;
+    readonly targetTouches: TouchList;
+    readonly touches: TouchList;
+    readonly which: number;
+}
+
+declare var TouchEvent: {
+    prototype: TouchEvent;
+    new(type: string, touchEventInit?: TouchEventInit): TouchEvent;
+};
+
+interface TouchList {
+    readonly length: number;
+    item(index: number): Touch | null;
+    [index: number]: Touch;
+}
+
+declare var TouchList: {
+    prototype: TouchList;
+    new(): TouchList;
+};
+
+interface TrackEvent extends Event {
+    readonly track: VideoTrack | AudioTrack | TextTrack | null;
+}
+
+declare var TrackEvent: {
+    prototype: TrackEvent;
+    new(typeArg: string, eventInitDict?: TrackEventInit): TrackEvent;
+};
+
+interface TransitionEvent extends Event {
+    readonly elapsedTime: number;
+    readonly propertyName: string;
+    initTransitionEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, propertyNameArg: string, elapsedTimeArg: number): void;
+}
+
+declare var TransitionEvent: {
+    prototype: TransitionEvent;
+    new(typeArg: string, eventInitDict?: TransitionEventInit): TransitionEvent;
+};
+
+interface TreeWalker {
+    currentNode: Node;
+    readonly expandEntityReferences: boolean;
+    readonly filter: NodeFilter;
+    readonly root: Node;
+    readonly whatToShow: number;
+    firstChild(): Node;
+    lastChild(): Node;
+    nextNode(): Node;
+    nextSibling(): Node;
+    parentNode(): Node;
+    previousNode(): Node;
+    previousSibling(): Node;
+}
+
+declare var TreeWalker: {
+    prototype: TreeWalker;
+    new(): TreeWalker;
+};
+
+interface UIEvent extends Event {
+    readonly detail: number;
+    readonly view: Window;
+    initUIEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number): void;
+}
+
+declare var UIEvent: {
+    prototype: UIEvent;
+    new(typeArg: string, eventInitDict?: UIEventInit): UIEvent;
+};
+
+interface UnviewableContentIdentifiedEvent extends NavigationEventWithReferrer {
+    readonly mediaType: string;
+}
+
+declare var UnviewableContentIdentifiedEvent: {
+    prototype: UnviewableContentIdentifiedEvent;
+    new(): UnviewableContentIdentifiedEvent;
+};
+
+interface URL {
+    hash: string;
+    host: string;
+    hostname: string;
+    href: string;
+    readonly origin: string;
+    password: string;
+    pathname: string;
+    port: string;
+    protocol: string;
+    search: string;
+    username: string;
+    readonly searchParams: URLSearchParams;
+    toString(): string;
+}
+
+declare var URL: {
+    prototype: URL;
+    new(url: string, base?: string): URL;
+    createObjectURL(object: any, options?: ObjectURLOptions): string;
+    revokeObjectURL(url: string): void;
+};
+
+interface ValidityState {
+    readonly badInput: boolean;
+    readonly customError: boolean;
+    readonly patternMismatch: boolean;
+    readonly rangeOverflow: boolean;
+    readonly rangeUnderflow: boolean;
+    readonly stepMismatch: boolean;
+    readonly tooLong: boolean;
+    readonly typeMismatch: boolean;
+    readonly valid: boolean;
+    readonly valueMissing: boolean;
+}
+
+declare var ValidityState: {
+    prototype: ValidityState;
+    new(): ValidityState;
+};
+
+interface VideoPlaybackQuality {
+    readonly corruptedVideoFrames: number;
+    readonly creationTime: number;
+    readonly droppedVideoFrames: number;
+    readonly totalFrameDelay: number;
+    readonly totalVideoFrames: number;
+}
+
+declare var VideoPlaybackQuality: {
+    prototype: VideoPlaybackQuality;
+    new(): VideoPlaybackQuality;
+};
+
+interface VideoTrack {
+    readonly id: string;
+    kind: string;
+    readonly label: string;
+    language: string;
+    selected: boolean;
+    readonly sourceBuffer: SourceBuffer;
+}
+
+declare var VideoTrack: {
+    prototype: VideoTrack;
+    new(): VideoTrack;
+};
+
+interface VideoTrackListEventMap {
+    "addtrack": TrackEvent;
+    "change": Event;
+    "removetrack": TrackEvent;
+}
+
+interface VideoTrackList extends EventTarget {
+    readonly length: number;
+    onaddtrack: (this: VideoTrackList, ev: TrackEvent) => any;
+    onchange: (this: VideoTrackList, ev: Event) => any;
+    onremovetrack: (this: VideoTrackList, ev: TrackEvent) => any;
+    readonly selectedIndex: number;
+    getTrackById(id: string): VideoTrack | null;
+    item(index: number): VideoTrack;
+    addEventListener<K extends keyof VideoTrackListEventMap>(type: K, listener: (this: VideoTrackList, ev: VideoTrackListEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+    [index: number]: VideoTrack;
+}
+
+declare var VideoTrackList: {
+    prototype: VideoTrackList;
+    new(): VideoTrackList;
+};
+
+interface WaveShaperNode extends AudioNode {
+    curve: Float32Array | null;
+    oversample: OverSampleType;
+}
+
+declare var WaveShaperNode: {
+    prototype: WaveShaperNode;
+    new(): WaveShaperNode;
+};
+
+interface WebAuthentication {
+    getAssertion(assertionChallenge: any, options?: AssertionOptions): Promise<WebAuthnAssertion>;
+    makeCredential(accountInformation: Account, cryptoParameters: ScopedCredentialParameters[], attestationChallenge: any, options?: ScopedCredentialOptions): Promise<ScopedCredentialInfo>;
+}
+
+declare var WebAuthentication: {
+    prototype: WebAuthentication;
+    new(): WebAuthentication;
+};
+
+interface WebAuthnAssertion {
+    readonly authenticatorData: ArrayBuffer;
+    readonly clientData: ArrayBuffer;
+    readonly credential: ScopedCredential;
+    readonly signature: ArrayBuffer;
+}
+
+declare var WebAuthnAssertion: {
+    prototype: WebAuthnAssertion;
+    new(): WebAuthnAssertion;
+};
+
+interface WEBGL_compressed_texture_s3tc {
+    readonly COMPRESSED_RGB_S3TC_DXT1_EXT: number;
+    readonly COMPRESSED_RGBA_S3TC_DXT1_EXT: number;
+    readonly COMPRESSED_RGBA_S3TC_DXT3_EXT: number;
+    readonly COMPRESSED_RGBA_S3TC_DXT5_EXT: number;
+}
+
+declare var WEBGL_compressed_texture_s3tc: {
+    prototype: WEBGL_compressed_texture_s3tc;
+    new(): WEBGL_compressed_texture_s3tc;
+    readonly COMPRESSED_RGB_S3TC_DXT1_EXT: number;
+    readonly COMPRESSED_RGBA_S3TC_DXT1_EXT: number;
+    readonly COMPRESSED_RGBA_S3TC_DXT3_EXT: number;
+    readonly COMPRESSED_RGBA_S3TC_DXT5_EXT: number;
+};
+
+interface WEBGL_debug_renderer_info {
+    readonly UNMASKED_RENDERER_WEBGL: number;
+    readonly UNMASKED_VENDOR_WEBGL: number;
+}
+
+declare var WEBGL_debug_renderer_info: {
+    prototype: WEBGL_debug_renderer_info;
+    new(): WEBGL_debug_renderer_info;
+    readonly UNMASKED_RENDERER_WEBGL: number;
+    readonly UNMASKED_VENDOR_WEBGL: number;
+};
+
+interface WEBGL_depth_texture {
+    readonly UNSIGNED_INT_24_8_WEBGL: number;
+}
+
+declare var WEBGL_depth_texture: {
+    prototype: WEBGL_depth_texture;
+    new(): WEBGL_depth_texture;
+    readonly UNSIGNED_INT_24_8_WEBGL: number;
+};
+
+interface WebGLActiveInfo {
+    readonly name: string;
+    readonly size: number;
+    readonly type: number;
+}
+
+declare var WebGLActiveInfo: {
+    prototype: WebGLActiveInfo;
+    new(): WebGLActiveInfo;
+};
+
+interface WebGLBuffer extends WebGLObject {
+}
+
+declare var WebGLBuffer: {
+    prototype: WebGLBuffer;
+    new(): WebGLBuffer;
+};
+
+interface WebGLContextEvent extends Event {
+    readonly statusMessage: string;
+}
+
+declare var WebGLContextEvent: {
+    prototype: WebGLContextEvent;
+    new(typeArg: string, eventInitDict?: WebGLContextEventInit): WebGLContextEvent;
+};
+
+interface WebGLFramebuffer extends WebGLObject {
+}
+
+declare var WebGLFramebuffer: {
+    prototype: WebGLFramebuffer;
+    new(): WebGLFramebuffer;
+};
+
+interface WebGLObject {
+}
+
+declare var WebGLObject: {
+    prototype: WebGLObject;
+    new(): WebGLObject;
+};
+
+interface WebGLProgram extends WebGLObject {
+}
+
+declare var WebGLProgram: {
+    prototype: WebGLProgram;
+    new(): WebGLProgram;
+};
+
+interface WebGLRenderbuffer extends WebGLObject {
+}
+
+declare var WebGLRenderbuffer: {
+    prototype: WebGLRenderbuffer;
+    new(): WebGLRenderbuffer;
+};
+
+interface WebGLRenderingContext {
+    readonly canvas: HTMLCanvasElement;
+    readonly drawingBufferHeight: number;
+    readonly drawingBufferWidth: number;
+    activeTexture(texture: number): void;
+    attachShader(program: WebGLProgram | null, shader: WebGLShader | null): void;
+    bindAttribLocation(program: WebGLProgram | null, index: number, name: string): void;
+    bindBuffer(target: number, buffer: WebGLBuffer | null): void;
+    bindFramebuffer(target: number, framebuffer: WebGLFramebuffer | null): void;
+    bindRenderbuffer(target: number, renderbuffer: WebGLRenderbuffer | null): void;
+    bindTexture(target: number, texture: WebGLTexture | null): void;
+    blendColor(red: number, green: number, blue: number, alpha: number): void;
+    blendEquation(mode: number): void;
+    blendEquationSeparate(modeRGB: number, modeAlpha: number): void;
+    blendFunc(sfactor: number, dfactor: number): void;
+    blendFuncSeparate(srcRGB: number, dstRGB: number, srcAlpha: number, dstAlpha: number): void;
+    bufferData(target: number, size: number | ArrayBufferView | ArrayBuffer, usage: number): void;
+    bufferSubData(target: number, offset: number, data: ArrayBufferView | ArrayBuffer): void;
+    checkFramebufferStatus(target: number): number;
+    clear(mask: number): void;
+    clearColor(red: number, green: number, blue: number, alpha: number): void;
+    clearDepth(depth: number): void;
+    clearStencil(s: number): void;
+    colorMask(red: boolean, green: boolean, blue: boolean, alpha: boolean): void;
+    compileShader(shader: WebGLShader | null): void;
+    compressedTexImage2D(target: number, level: number, internalformat: number, width: number, height: number, border: number, data: ArrayBufferView): void;
+    compressedTexSubImage2D(target: number, level: number, xoffset: number, yoffset: number, width: number, height: number, format: number, data: ArrayBufferView): void;
+    copyTexImage2D(target: number, level: number, internalformat: number, x: number, y: number, width: number, height: number, border: number): void;
+    copyTexSubImage2D(target: number, level: number, xoffset: number, yoffset: number, x: number, y: number, width: number, height: number): void;
+    createBuffer(): WebGLBuffer | null;
+    createFramebuffer(): WebGLFramebuffer | null;
+    createProgram(): WebGLProgram | null;
+    createRenderbuffer(): WebGLRenderbuffer | null;
+    createShader(type: number): WebGLShader | null;
+    createTexture(): WebGLTexture | null;
+    cullFace(mode: number): void;
+    deleteBuffer(buffer: WebGLBuffer | null): void;
+    deleteFramebuffer(framebuffer: WebGLFramebuffer | null): void;
+    deleteProgram(program: WebGLProgram | null): void;
+    deleteRenderbuffer(renderbuffer: WebGLRenderbuffer | null): void;
+    deleteShader(shader: WebGLShader | null): void;
+    deleteTexture(texture: WebGLTexture | null): void;
+    depthFunc(func: number): void;
+    depthMask(flag: boolean): void;
+    depthRange(zNear: number, zFar: number): void;
+    detachShader(program: WebGLProgram | null, shader: WebGLShader | null): void;
+    disable(cap: number): void;
+    disableVertexAttribArray(index: number): void;
+    drawArrays(mode: number, first: number, count: number): void;
+    drawElements(mode: number, count: number, type: number, offset: number): void;
+    enable(cap: number): void;
+    enableVertexAttribArray(index: number): void;
+    finish(): void;
+    flush(): void;
+    framebufferRenderbuffer(target: number, attachment: number, renderbuffertarget: number, renderbuffer: WebGLRenderbuffer | null): void;
+    framebufferTexture2D(target: number, attachment: number, textarget: number, texture: WebGLTexture | null, level: number): void;
+    frontFace(mode: number): void;
+    generateMipmap(target: number): void;
+    getActiveAttrib(program: WebGLProgram | null, index: number): WebGLActiveInfo | null;
+    getActiveUniform(program: WebGLProgram | null, index: number): WebGLActiveInfo | null;
+    getAttachedShaders(program: WebGLProgram | null): WebGLShader[] | null;
+    getAttribLocation(program: WebGLProgram | null, name: string): number;
+    getBufferParameter(target: number, pname: number): any;
+    getContextAttributes(): WebGLContextAttributes;
+    getError(): number;
+    getExtension(name: string): any;
+    getFramebufferAttachmentParameter(target: number, attachment: number, pname: number): any;
+    getParameter(pname: number): any;
+    getProgramInfoLog(program: WebGLProgram | null): string | null;
+    getProgramParameter(program: WebGLProgram | null, pname: number): any;
+    getRenderbufferParameter(target: number, pname: number): any;
+    getShaderInfoLog(shader: WebGLShader | null): string | null;
+    getShaderParameter(shader: WebGLShader | null, pname: number): any;
+    getShaderPrecisionFormat(shadertype: number, precisiontype: number): WebGLShaderPrecisionFormat | null;
+    getShaderSource(shader: WebGLShader | null): string | null;
+    getSupportedExtensions(): string[] | null;
+    getTexParameter(target: number, pname: number): any;
+    getUniform(program: WebGLProgram | null, location: WebGLUniformLocation | null): any;
+    getUniformLocation(program: WebGLProgram | null, name: string): WebGLUniformLocation | null;
+    getVertexAttrib(index: number, pname: number): any;
+    getVertexAttribOffset(index: number, pname: number): number;
+    hint(target: number, mode: number): void;
+    isBuffer(buffer: WebGLBuffer | null): boolean;
+    isContextLost(): boolean;
+    isEnabled(cap: number): boolean;
+    isFramebuffer(framebuffer: WebGLFramebuffer | null): boolean;
+    isProgram(program: WebGLProgram | null): boolean;
+    isRenderbuffer(renderbuffer: WebGLRenderbuffer | null): boolean;
+    isShader(shader: WebGLShader | null): boolean;
+    isTexture(texture: WebGLTexture | null): boolean;
+    lineWidth(width: number): void;
+    linkProgram(program: WebGLProgram | null): void;
+    pixelStorei(pname: number, param: number | boolean): void;
+    polygonOffset(factor: number, units: number): void;
+    readPixels(x: number, y: number, width: number, height: number, format: number, type: number, pixels: ArrayBufferView | null): void;
+    renderbufferStorage(target: number, internalformat: number, width: number, height: number): void;
+    sampleCoverage(value: number, invert: boolean): void;
+    scissor(x: number, y: number, width: number, height: number): void;
+    shaderSource(shader: WebGLShader | null, source: string): void;
+    stencilFunc(func: number, ref: number, mask: number): void;
+    stencilFuncSeparate(face: number, func: number, ref: number, mask: number): void;
+    stencilMask(mask: number): void;
+    stencilMaskSeparate(face: number, mask: number): void;
+    stencilOp(fail: number, zfail: number, zpass: number): void;
+    stencilOpSeparate(face: number, fail: number, zfail: number, zpass: number): void;
+    texImage2D(target: number, level: number, internalformat: number, width: number, height: number, border: number, format: number, type: number, pixels: ArrayBufferView | null): void;
+    texImage2D(target: number, level: number, internalformat: number, format: number, type: number, pixels: ImageBitmap | ImageData | HTMLVideoElement | HTMLImageElement | HTMLCanvasElement): void;
+    texParameterf(target: number, pname: number, param: number): void;
+    texParameteri(target: number, pname: number, param: number): void;
+    texSubImage2D(target: number, level: number, xoffset: number, yoffset: number, width: number, height: number, format: number, type: number, pixels: ArrayBufferView | null): void;
+    texSubImage2D(target: number, level: number, xoffset: number, yoffset: number, format: number, type: number, pixels: ImageBitmap | ImageData | HTMLVideoElement | HTMLImageElement | HTMLCanvasElement): void;
+    uniform1f(location: WebGLUniformLocation | null, x: number): void;
+    uniform1fv(location: WebGLUniformLocation, v: Float32Array | number[]): void;
+    uniform1i(location: WebGLUniformLocation | null, x: number): void;
+    uniform1iv(location: WebGLUniformLocation, v: Int32Array | number[]): void;
+    uniform2f(location: WebGLUniformLocation | null, x: number, y: number): void;
+    uniform2fv(location: WebGLUniformLocation, v: Float32Array | number[]): void;
+    uniform2i(location: WebGLUniformLocation | null, x: number, y: number): void;
+    uniform2iv(location: WebGLUniformLocation, v: Int32Array | number[]): void;
+    uniform3f(location: WebGLUniformLocation | null, x: number, y: number, z: number): void;
+    uniform3fv(location: WebGLUniformLocation, v: Float32Array | number[]): void;
+    uniform3i(location: WebGLUniformLocation | null, x: number, y: number, z: number): void;
+    uniform3iv(location: WebGLUniformLocation, v: Int32Array | number[]): void;
+    uniform4f(location: WebGLUniformLocation | null, x: number, y: number, z: number, w: number): void;
+    uniform4fv(location: WebGLUniformLocation, v: Float32Array | number[]): void;
+    uniform4i(location: WebGLUniformLocation | null, x: number, y: number, z: number, w: number): void;
+    uniform4iv(location: WebGLUniformLocation, v: Int32Array | number[]): void;
+    uniformMatrix2fv(location: WebGLUniformLocation, transpose: boolean, value: Float32Array | number[]): void;
+    uniformMatrix3fv(location: WebGLUniformLocation, transpose: boolean, value: Float32Array | number[]): void;
+    uniformMatrix4fv(location: WebGLUniformLocation, transpose: boolean, value: Float32Array | number[]): void;
+    useProgram(program: WebGLProgram | null): void;
+    validateProgram(program: WebGLProgram | null): void;
+    vertexAttrib1f(indx: number, x: number): void;
+    vertexAttrib1fv(indx: number, values: Float32Array | number[]): void;
+    vertexAttrib2f(indx: number, x: number, y: number): void;
+    vertexAttrib2fv(indx: number, values: Float32Array | number[]): void;
+    vertexAttrib3f(indx: number, x: number, y: number, z: number): void;
+    vertexAttrib3fv(indx: number, values: Float32Array | number[]): void;
+    vertexAttrib4f(indx: number, x: number, y: number, z: number, w: number): void;
+    vertexAttrib4fv(indx: number, values: Float32Array | number[]): void;
+    vertexAttribPointer(indx: number, size: number, type: number, normalized: boolean, stride: number, offset: number): void;
+    viewport(x: number, y: number, width: number, height: number): void;
+    readonly ACTIVE_ATTRIBUTES: number;
+    readonly ACTIVE_TEXTURE: number;
+    readonly ACTIVE_UNIFORMS: number;
+    readonly ALIASED_LINE_WIDTH_RANGE: number;
+    readonly ALIASED_POINT_SIZE_RANGE: number;
+    readonly ALPHA: number;
+    readonly ALPHA_BITS: number;
+    readonly ALWAYS: number;
+    readonly ARRAY_BUFFER: number;
+    readonly ARRAY_BUFFER_BINDING: number;
+    readonly ATTACHED_SHADERS: number;
+    readonly BACK: number;
+    readonly BLEND: number;
+    readonly BLEND_COLOR: number;
+    readonly BLEND_DST_ALPHA: number;
+    readonly BLEND_DST_RGB: number;
+    readonly BLEND_EQUATION: number;
+    readonly BLEND_EQUATION_ALPHA: number;
+    readonly BLEND_EQUATION_RGB: number;
+    readonly BLEND_SRC_ALPHA: number;
+    readonly BLEND_SRC_RGB: number;
+    readonly BLUE_BITS: number;
+    readonly BOOL: number;
+    readonly BOOL_VEC2: number;
+    readonly BOOL_VEC3: number;
+    readonly BOOL_VEC4: number;
+    readonly BROWSER_DEFAULT_WEBGL: number;
+    readonly BUFFER_SIZE: number;
+    readonly BUFFER_USAGE: number;
+    readonly BYTE: number;
+    readonly CCW: number;
+    readonly CLAMP_TO_EDGE: number;
+    readonly COLOR_ATTACHMENT0: number;
+    readonly COLOR_BUFFER_BIT: number;
+    readonly COLOR_CLEAR_VALUE: number;
+    readonly COLOR_WRITEMASK: number;
+    readonly COMPILE_STATUS: number;
+    readonly COMPRESSED_TEXTURE_FORMATS: number;
+    readonly CONSTANT_ALPHA: number;
+    readonly CONSTANT_COLOR: number;
+    readonly CONTEXT_LOST_WEBGL: number;
+    readonly CULL_FACE: number;
+    readonly CULL_FACE_MODE: number;
+    readonly CURRENT_PROGRAM: number;
+    readonly CURRENT_VERTEX_ATTRIB: number;
+    readonly CW: number;
+    readonly DECR: number;
+    readonly DECR_WRAP: number;
+    readonly DELETE_STATUS: number;
+    readonly DEPTH_ATTACHMENT: number;
+    readonly DEPTH_BITS: number;
+    readonly DEPTH_BUFFER_BIT: number;
+    readonly DEPTH_CLEAR_VALUE: number;
+    readonly DEPTH_COMPONENT: number;
+    readonly DEPTH_COMPONENT16: number;
+    readonly DEPTH_FUNC: number;
+    readonly DEPTH_RANGE: number;
+    readonly DEPTH_STENCIL: number;
+    readonly DEPTH_STENCIL_ATTACHMENT: number;
+    readonly DEPTH_TEST: number;
+    readonly DEPTH_WRITEMASK: number;
+    readonly DITHER: number;
+    readonly DONT_CARE: number;
+    readonly DST_ALPHA: number;
+    readonly DST_COLOR: number;
+    readonly DYNAMIC_DRAW: number;
+    readonly ELEMENT_ARRAY_BUFFER: number;
+    readonly ELEMENT_ARRAY_BUFFER_BINDING: number;
+    readonly EQUAL: number;
+    readonly FASTEST: number;
+    readonly FLOAT: number;
+    readonly FLOAT_MAT2: number;
+    readonly FLOAT_MAT3: number;
+    readonly FLOAT_MAT4: number;
+    readonly FLOAT_VEC2: number;
+    readonly FLOAT_VEC3: number;
+    readonly FLOAT_VEC4: number;
+    readonly FRAGMENT_SHADER: number;
+    readonly FRAMEBUFFER: number;
+    readonly FRAMEBUFFER_ATTACHMENT_OBJECT_NAME: number;
+    readonly FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE: number;
+    readonly FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE: number;
+    readonly FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL: number;
+    readonly FRAMEBUFFER_BINDING: number;
+    readonly FRAMEBUFFER_COMPLETE: number;
+    readonly FRAMEBUFFER_INCOMPLETE_ATTACHMENT: number;
+    readonly FRAMEBUFFER_INCOMPLETE_DIMENSIONS: number;
+    readonly FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT: number;
+    readonly FRAMEBUFFER_UNSUPPORTED: number;
+    readonly FRONT: number;
+    readonly FRONT_AND_BACK: number;
+    readonly FRONT_FACE: number;
+    readonly FUNC_ADD: number;
+    readonly FUNC_REVERSE_SUBTRACT: number;
+    readonly FUNC_SUBTRACT: number;
+    readonly GENERATE_MIPMAP_HINT: number;
+    readonly GEQUAL: number;
+    readonly GREATER: number;
+    readonly GREEN_BITS: number;
+    readonly HIGH_FLOAT: number;
+    readonly HIGH_INT: number;
+    readonly IMPLEMENTATION_COLOR_READ_FORMAT: number;
+    readonly IMPLEMENTATION_COLOR_READ_TYPE: number;
+    readonly INCR: number;
+    readonly INCR_WRAP: number;
+    readonly INT: number;
+    readonly INT_VEC2: number;
+    readonly INT_VEC3: number;
+    readonly INT_VEC4: number;
+    readonly INVALID_ENUM: number;
+    readonly INVALID_FRAMEBUFFER_OPERATION: number;
+    readonly INVALID_OPERATION: number;
+    readonly INVALID_VALUE: number;
+    readonly INVERT: number;
+    readonly KEEP: number;
+    readonly LEQUAL: number;
+    readonly LESS: number;
+    readonly LINE_LOOP: number;
+    readonly LINE_STRIP: number;
+    readonly LINE_WIDTH: number;
+    readonly LINEAR: number;
+    readonly LINEAR_MIPMAP_LINEAR: number;
+    readonly LINEAR_MIPMAP_NEAREST: number;
+    readonly LINES: number;
+    readonly LINK_STATUS: number;
+    readonly LOW_FLOAT: number;
+    readonly LOW_INT: number;
+    readonly LUMINANCE: number;
+    readonly LUMINANCE_ALPHA: number;
+    readonly MAX_COMBINED_TEXTURE_IMAGE_UNITS: number;
+    readonly MAX_CUBE_MAP_TEXTURE_SIZE: number;
+    readonly MAX_FRAGMENT_UNIFORM_VECTORS: number;
+    readonly MAX_RENDERBUFFER_SIZE: number;
+    readonly MAX_TEXTURE_IMAGE_UNITS: number;
+    readonly MAX_TEXTURE_SIZE: number;
+    readonly MAX_VARYING_VECTORS: number;
+    readonly MAX_VERTEX_ATTRIBS: number;
+    readonly MAX_VERTEX_TEXTURE_IMAGE_UNITS: number;
+    readonly MAX_VERTEX_UNIFORM_VECTORS: number;
+    readonly MAX_VIEWPORT_DIMS: number;
+    readonly MEDIUM_FLOAT: number;
+    readonly MEDIUM_INT: number;
+    readonly MIRRORED_REPEAT: number;
+    readonly NEAREST: number;
+    readonly NEAREST_MIPMAP_LINEAR: number;
+    readonly NEAREST_MIPMAP_NEAREST: number;
+    readonly NEVER: number;
+    readonly NICEST: number;
+    readonly NO_ERROR: number;
+    readonly NONE: number;
+    readonly NOTEQUAL: number;
+    readonly ONE: number;
+    readonly ONE_MINUS_CONSTANT_ALPHA: number;
+    readonly ONE_MINUS_CONSTANT_COLOR: number;
+    readonly ONE_MINUS_DST_ALPHA: number;
+    readonly ONE_MINUS_DST_COLOR: number;
+    readonly ONE_MINUS_SRC_ALPHA: number;
+    readonly ONE_MINUS_SRC_COLOR: number;
+    readonly OUT_OF_MEMORY: number;
+    readonly PACK_ALIGNMENT: number;
+    readonly POINTS: number;
+    readonly POLYGON_OFFSET_FACTOR: number;
+    readonly POLYGON_OFFSET_FILL: number;
+    readonly POLYGON_OFFSET_UNITS: number;
+    readonly RED_BITS: number;
+    readonly RENDERBUFFER: number;
+    readonly RENDERBUFFER_ALPHA_SIZE: number;
+    readonly RENDERBUFFER_BINDING: number;
+    readonly RENDERBUFFER_BLUE_SIZE: number;
+    readonly RENDERBUFFER_DEPTH_SIZE: number;
+    readonly RENDERBUFFER_GREEN_SIZE: number;
+    readonly RENDERBUFFER_HEIGHT: number;
+    readonly RENDERBUFFER_INTERNAL_FORMAT: number;
+    readonly RENDERBUFFER_RED_SIZE: number;
+    readonly RENDERBUFFER_STENCIL_SIZE: number;
+    readonly RENDERBUFFER_WIDTH: number;
+    readonly RENDERER: number;
+    readonly REPEAT: number;
+    readonly REPLACE: number;
+    readonly RGB: number;
+    readonly RGB5_A1: number;
+    readonly RGB565: number;
+    readonly RGBA: number;
+    readonly RGBA4: number;
+    readonly SAMPLE_ALPHA_TO_COVERAGE: number;
+    readonly SAMPLE_BUFFERS: number;
+    readonly SAMPLE_COVERAGE: number;
+    readonly SAMPLE_COVERAGE_INVERT: number;
+    readonly SAMPLE_COVERAGE_VALUE: number;
+    readonly SAMPLER_2D: number;
+    readonly SAMPLER_CUBE: number;
+    readonly SAMPLES: number;
+    readonly SCISSOR_BOX: number;
+    readonly SCISSOR_TEST: number;
+    readonly SHADER_TYPE: number;
+    readonly SHADING_LANGUAGE_VERSION: number;
+    readonly SHORT: number;
+    readonly SRC_ALPHA: number;
+    readonly SRC_ALPHA_SATURATE: number;
+    readonly SRC_COLOR: number;
+    readonly STATIC_DRAW: number;
+    readonly STENCIL_ATTACHMENT: number;
+    readonly STENCIL_BACK_FAIL: number;
+    readonly STENCIL_BACK_FUNC: number;
+    readonly STENCIL_BACK_PASS_DEPTH_FAIL: number;
+    readonly STENCIL_BACK_PASS_DEPTH_PASS: number;
+    readonly STENCIL_BACK_REF: number;
+    readonly STENCIL_BACK_VALUE_MASK: number;
+    readonly STENCIL_BACK_WRITEMASK: number;
+    readonly STENCIL_BITS: number;
+    readonly STENCIL_BUFFER_BIT: number;
+    readonly STENCIL_CLEAR_VALUE: number;
+    readonly STENCIL_FAIL: number;
+    readonly STENCIL_FUNC: number;
+    readonly STENCIL_INDEX: number;
+    readonly STENCIL_INDEX8: number;
+    readonly STENCIL_PASS_DEPTH_FAIL: number;
+    readonly STENCIL_PASS_DEPTH_PASS: number;
+    readonly STENCIL_REF: number;
+    readonly STENCIL_TEST: number;
+    readonly STENCIL_VALUE_MASK: number;
+    readonly STENCIL_WRITEMASK: number;
+    readonly STREAM_DRAW: number;
+    readonly SUBPIXEL_BITS: number;
+    readonly TEXTURE: number;
+    readonly TEXTURE_2D: number;
+    readonly TEXTURE_BINDING_2D: number;
+    readonly TEXTURE_BINDING_CUBE_MAP: number;
+    readonly TEXTURE_CUBE_MAP: number;
+    readonly TEXTURE_CUBE_MAP_NEGATIVE_X: number;
+    readonly TEXTURE_CUBE_MAP_NEGATIVE_Y: number;
+    readonly TEXTURE_CUBE_MAP_NEGATIVE_Z: number;
+    readonly TEXTURE_CUBE_MAP_POSITIVE_X: number;
+    readonly TEXTURE_CUBE_MAP_POSITIVE_Y: number;
+    readonly TEXTURE_CUBE_MAP_POSITIVE_Z: number;
+    readonly TEXTURE_MAG_FILTER: number;
+    readonly TEXTURE_MIN_FILTER: number;
+    readonly TEXTURE_WRAP_S: number;
+    readonly TEXTURE_WRAP_T: number;
+    readonly TEXTURE0: number;
+    readonly TEXTURE1: number;
+    readonly TEXTURE10: number;
+    readonly TEXTURE11: number;
+    readonly TEXTURE12: number;
+    readonly TEXTURE13: number;
+    readonly TEXTURE14: number;
+    readonly TEXTURE15: number;
+    readonly TEXTURE16: number;
+    readonly TEXTURE17: number;
+    readonly TEXTURE18: number;
+    readonly TEXTURE19: number;
+    readonly TEXTURE2: number;
+    readonly TEXTURE20: number;
+    readonly TEXTURE21: number;
+    readonly TEXTURE22: number;
+    readonly TEXTURE23: number;
+    readonly TEXTURE24: number;
+    readonly TEXTURE25: number;
+    readonly TEXTURE26: number;
+    readonly TEXTURE27: number;
+    readonly TEXTURE28: number;
+    readonly TEXTURE29: number;
+    readonly TEXTURE3: number;
+    readonly TEXTURE30: number;
+    readonly TEXTURE31: number;
+    readonly TEXTURE4: number;
+    readonly TEXTURE5: number;
+    readonly TEXTURE6: number;
+    readonly TEXTURE7: number;
+    readonly TEXTURE8: number;
+    readonly TEXTURE9: number;
+    readonly TRIANGLE_FAN: number;
+    readonly TRIANGLE_STRIP: number;
+    readonly TRIANGLES: number;
+    readonly UNPACK_ALIGNMENT: number;
+    readonly UNPACK_COLORSPACE_CONVERSION_WEBGL: number;
+    readonly UNPACK_FLIP_Y_WEBGL: number;
+    readonly UNPACK_PREMULTIPLY_ALPHA_WEBGL: number;
+    readonly UNSIGNED_BYTE: number;
+    readonly UNSIGNED_INT: number;
+    readonly UNSIGNED_SHORT: number;
+    readonly UNSIGNED_SHORT_4_4_4_4: number;
+    readonly UNSIGNED_SHORT_5_5_5_1: number;
+    readonly UNSIGNED_SHORT_5_6_5: number;
+    readonly VALIDATE_STATUS: number;
+    readonly VENDOR: number;
+    readonly VERSION: number;
+    readonly VERTEX_ATTRIB_ARRAY_BUFFER_BINDING: number;
+    readonly VERTEX_ATTRIB_ARRAY_ENABLED: number;
+    readonly VERTEX_ATTRIB_ARRAY_NORMALIZED: number;
+    readonly VERTEX_ATTRIB_ARRAY_POINTER: number;
+    readonly VERTEX_ATTRIB_ARRAY_SIZE: number;
+    readonly VERTEX_ATTRIB_ARRAY_STRIDE: number;
+    readonly VERTEX_ATTRIB_ARRAY_TYPE: number;
+    readonly VERTEX_SHADER: number;
+    readonly VIEWPORT: number;
+    readonly ZERO: number;
+}
+
+declare var WebGLRenderingContext: {
+    prototype: WebGLRenderingContext;
+    new(): WebGLRenderingContext;
+    readonly ACTIVE_ATTRIBUTES: number;
+    readonly ACTIVE_TEXTURE: number;
+    readonly ACTIVE_UNIFORMS: number;
+    readonly ALIASED_LINE_WIDTH_RANGE: number;
+    readonly ALIASED_POINT_SIZE_RANGE: number;
+    readonly ALPHA: number;
+    readonly ALPHA_BITS: number;
+    readonly ALWAYS: number;
+    readonly ARRAY_BUFFER: number;
+    readonly ARRAY_BUFFER_BINDING: number;
+    readonly ATTACHED_SHADERS: number;
+    readonly BACK: number;
+    readonly BLEND: number;
+    readonly BLEND_COLOR: number;
+    readonly BLEND_DST_ALPHA: number;
+    readonly BLEND_DST_RGB: number;
+    readonly BLEND_EQUATION: number;
+    readonly BLEND_EQUATION_ALPHA: number;
+    readonly BLEND_EQUATION_RGB: number;
+    readonly BLEND_SRC_ALPHA: number;
+    readonly BLEND_SRC_RGB: number;
+    readonly BLUE_BITS: number;
+    readonly BOOL: number;
+    readonly BOOL_VEC2: number;
+    readonly BOOL_VEC3: number;
+    readonly BOOL_VEC4: number;
+    readonly BROWSER_DEFAULT_WEBGL: number;
+    readonly BUFFER_SIZE: number;
+    readonly BUFFER_USAGE: number;
+    readonly BYTE: number;
+    readonly CCW: number;
+    readonly CLAMP_TO_EDGE: number;
+    readonly COLOR_ATTACHMENT0: number;
+    readonly COLOR_BUFFER_BIT: number;
+    readonly COLOR_CLEAR_VALUE: number;
+    readonly COLOR_WRITEMASK: number;
+    readonly COMPILE_STATUS: number;
+    readonly COMPRESSED_TEXTURE_FORMATS: number;
+    readonly CONSTANT_ALPHA: number;
+    readonly CONSTANT_COLOR: number;
+    readonly CONTEXT_LOST_WEBGL: number;
+    readonly CULL_FACE: number;
+    readonly CULL_FACE_MODE: number;
+    readonly CURRENT_PROGRAM: number;
+    readonly CURRENT_VERTEX_ATTRIB: number;
+    readonly CW: number;
+    readonly DECR: number;
+    readonly DECR_WRAP: number;
+    readonly DELETE_STATUS: number;
+    readonly DEPTH_ATTACHMENT: number;
+    readonly DEPTH_BITS: number;
+    readonly DEPTH_BUFFER_BIT: number;
+    readonly DEPTH_CLEAR_VALUE: number;
+    readonly DEPTH_COMPONENT: number;
+    readonly DEPTH_COMPONENT16: number;
+    readonly DEPTH_FUNC: number;
+    readonly DEPTH_RANGE: number;
+    readonly DEPTH_STENCIL: number;
+    readonly DEPTH_STENCIL_ATTACHMENT: number;
+    readonly DEPTH_TEST: number;
+    readonly DEPTH_WRITEMASK: number;
+    readonly DITHER: number;
+    readonly DONT_CARE: number;
+    readonly DST_ALPHA: number;
+    readonly DST_COLOR: number;
+    readonly DYNAMIC_DRAW: number;
+    readonly ELEMENT_ARRAY_BUFFER: number;
+    readonly ELEMENT_ARRAY_BUFFER_BINDING: number;
+    readonly EQUAL: number;
+    readonly FASTEST: number;
+    readonly FLOAT: number;
+    readonly FLOAT_MAT2: number;
+    readonly FLOAT_MAT3: number;
+    readonly FLOAT_MAT4: number;
+    readonly FLOAT_VEC2: number;
+    readonly FLOAT_VEC3: number;
+    readonly FLOAT_VEC4: number;
+    readonly FRAGMENT_SHADER: number;
+    readonly FRAMEBUFFER: number;
+    readonly FRAMEBUFFER_ATTACHMENT_OBJECT_NAME: number;
+    readonly FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE: number;
+    readonly FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE: number;
+    readonly FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL: number;
+    readonly FRAMEBUFFER_BINDING: number;
+    readonly FRAMEBUFFER_COMPLETE: number;
+    readonly FRAMEBUFFER_INCOMPLETE_ATTACHMENT: number;
+    readonly FRAMEBUFFER_INCOMPLETE_DIMENSIONS: number;
+    readonly FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT: number;
+    readonly FRAMEBUFFER_UNSUPPORTED: number;
+    readonly FRONT: number;
+    readonly FRONT_AND_BACK: number;
+    readonly FRONT_FACE: number;
+    readonly FUNC_ADD: number;
+    readonly FUNC_REVERSE_SUBTRACT: number;
+    readonly FUNC_SUBTRACT: number;
+    readonly GENERATE_MIPMAP_HINT: number;
+    readonly GEQUAL: number;
+    readonly GREATER: number;
+    readonly GREEN_BITS: number;
+    readonly HIGH_FLOAT: number;
+    readonly HIGH_INT: number;
+    readonly IMPLEMENTATION_COLOR_READ_FORMAT: number;
+    readonly IMPLEMENTATION_COLOR_READ_TYPE: number;
+    readonly INCR: number;
+    readonly INCR_WRAP: number;
+    readonly INT: number;
+    readonly INT_VEC2: number;
+    readonly INT_VEC3: number;
+    readonly INT_VEC4: number;
+    readonly INVALID_ENUM: number;
+    readonly INVALID_FRAMEBUFFER_OPERATION: number;
+    readonly INVALID_OPERATION: number;
+    readonly INVALID_VALUE: number;
+    readonly INVERT: number;
+    readonly KEEP: number;
+    readonly LEQUAL: number;
+    readonly LESS: number;
+    readonly LINE_LOOP: number;
+    readonly LINE_STRIP: number;
+    readonly LINE_WIDTH: number;
+    readonly LINEAR: number;
+    readonly LINEAR_MIPMAP_LINEAR: number;
+    readonly LINEAR_MIPMAP_NEAREST: number;
+    readonly LINES: number;
+    readonly LINK_STATUS: number;
+    readonly LOW_FLOAT: number;
+    readonly LOW_INT: number;
+    readonly LUMINANCE: number;
+    readonly LUMINANCE_ALPHA: number;
+    readonly MAX_COMBINED_TEXTURE_IMAGE_UNITS: number;
+    readonly MAX_CUBE_MAP_TEXTURE_SIZE: number;
+    readonly MAX_FRAGMENT_UNIFORM_VECTORS: number;
+    readonly MAX_RENDERBUFFER_SIZE: number;
+    readonly MAX_TEXTURE_IMAGE_UNITS: number;
+    readonly MAX_TEXTURE_SIZE: number;
+    readonly MAX_VARYING_VECTORS: number;
+    readonly MAX_VERTEX_ATTRIBS: number;
+    readonly MAX_VERTEX_TEXTURE_IMAGE_UNITS: number;
+    readonly MAX_VERTEX_UNIFORM_VECTORS: number;
+    readonly MAX_VIEWPORT_DIMS: number;
+    readonly MEDIUM_FLOAT: number;
+    readonly MEDIUM_INT: number;
+    readonly MIRRORED_REPEAT: number;
+    readonly NEAREST: number;
+    readonly NEAREST_MIPMAP_LINEAR: number;
+    readonly NEAREST_MIPMAP_NEAREST: number;
+    readonly NEVER: number;
+    readonly NICEST: number;
+    readonly NO_ERROR: number;
+    readonly NONE: number;
+    readonly NOTEQUAL: number;
+    readonly ONE: number;
+    readonly ONE_MINUS_CONSTANT_ALPHA: number;
+    readonly ONE_MINUS_CONSTANT_COLOR: number;
+    readonly ONE_MINUS_DST_ALPHA: number;
+    readonly ONE_MINUS_DST_COLOR: number;
+    readonly ONE_MINUS_SRC_ALPHA: number;
+    readonly ONE_MINUS_SRC_COLOR: number;
+    readonly OUT_OF_MEMORY: number;
+    readonly PACK_ALIGNMENT: number;
+    readonly POINTS: number;
+    readonly POLYGON_OFFSET_FACTOR: number;
+    readonly POLYGON_OFFSET_FILL: number;
+    readonly POLYGON_OFFSET_UNITS: number;
+    readonly RED_BITS: number;
+    readonly RENDERBUFFER: number;
+    readonly RENDERBUFFER_ALPHA_SIZE: number;
+    readonly RENDERBUFFER_BINDING: number;
+    readonly RENDERBUFFER_BLUE_SIZE: number;
+    readonly RENDERBUFFER_DEPTH_SIZE: number;
+    readonly RENDERBUFFER_GREEN_SIZE: number;
+    readonly RENDERBUFFER_HEIGHT: number;
+    readonly RENDERBUFFER_INTERNAL_FORMAT: number;
+    readonly RENDERBUFFER_RED_SIZE: number;
+    readonly RENDERBUFFER_STENCIL_SIZE: number;
+    readonly RENDERBUFFER_WIDTH: number;
+    readonly RENDERER: number;
+    readonly REPEAT: number;
+    readonly REPLACE: number;
+    readonly RGB: number;
+    readonly RGB5_A1: number;
+    readonly RGB565: number;
+    readonly RGBA: number;
+    readonly RGBA4: number;
+    readonly SAMPLE_ALPHA_TO_COVERAGE: number;
+    readonly SAMPLE_BUFFERS: number;
+    readonly SAMPLE_COVERAGE: number;
+    readonly SAMPLE_COVERAGE_INVERT: number;
+    readonly SAMPLE_COVERAGE_VALUE: number;
+    readonly SAMPLER_2D: number;
+    readonly SAMPLER_CUBE: number;
+    readonly SAMPLES: number;
+    readonly SCISSOR_BOX: number;
+    readonly SCISSOR_TEST: number;
+    readonly SHADER_TYPE: number;
+    readonly SHADING_LANGUAGE_VERSION: number;
+    readonly SHORT: number;
+    readonly SRC_ALPHA: number;
+    readonly SRC_ALPHA_SATURATE: number;
+    readonly SRC_COLOR: number;
+    readonly STATIC_DRAW: number;
+    readonly STENCIL_ATTACHMENT: number;
+    readonly STENCIL_BACK_FAIL: number;
+    readonly STENCIL_BACK_FUNC: number;
+    readonly STENCIL_BACK_PASS_DEPTH_FAIL: number;
+    readonly STENCIL_BACK_PASS_DEPTH_PASS: number;
+    readonly STENCIL_BACK_REF: number;
+    readonly STENCIL_BACK_VALUE_MASK: number;
+    readonly STENCIL_BACK_WRITEMASK: number;
+    readonly STENCIL_BITS: number;
+    readonly STENCIL_BUFFER_BIT: number;
+    readonly STENCIL_CLEAR_VALUE: number;
+    readonly STENCIL_FAIL: number;
+    readonly STENCIL_FUNC: number;
+    readonly STENCIL_INDEX: number;
+    readonly STENCIL_INDEX8: number;
+    readonly STENCIL_PASS_DEPTH_FAIL: number;
+    readonly STENCIL_PASS_DEPTH_PASS: number;
+    readonly STENCIL_REF: number;
+    readonly STENCIL_TEST: number;
+    readonly STENCIL_VALUE_MASK: number;
+    readonly STENCIL_WRITEMASK: number;
+    readonly STREAM_DRAW: number;
+    readonly SUBPIXEL_BITS: number;
+    readonly TEXTURE: number;
+    readonly TEXTURE_2D: number;
+    readonly TEXTURE_BINDING_2D: number;
+    readonly TEXTURE_BINDING_CUBE_MAP: number;
+    readonly TEXTURE_CUBE_MAP: number;
+    readonly TEXTURE_CUBE_MAP_NEGATIVE_X: number;
+    readonly TEXTURE_CUBE_MAP_NEGATIVE_Y: number;
+    readonly TEXTURE_CUBE_MAP_NEGATIVE_Z: number;
+    readonly TEXTURE_CUBE_MAP_POSITIVE_X: number;
+    readonly TEXTURE_CUBE_MAP_POSITIVE_Y: number;
+    readonly TEXTURE_CUBE_MAP_POSITIVE_Z: number;
+    readonly TEXTURE_MAG_FILTER: number;
+    readonly TEXTURE_MIN_FILTER: number;
+    readonly TEXTURE_WRAP_S: number;
+    readonly TEXTURE_WRAP_T: number;
+    readonly TEXTURE0: number;
+    readonly TEXTURE1: number;
+    readonly TEXTURE10: number;
+    readonly TEXTURE11: number;
+    readonly TEXTURE12: number;
+    readonly TEXTURE13: number;
+    readonly TEXTURE14: number;
+    readonly TEXTURE15: number;
+    readonly TEXTURE16: number;
+    readonly TEXTURE17: number;
+    readonly TEXTURE18: number;
+    readonly TEXTURE19: number;
+    readonly TEXTURE2: number;
+    readonly TEXTURE20: number;
+    readonly TEXTURE21: number;
+    readonly TEXTURE22: number;
+    readonly TEXTURE23: number;
+    readonly TEXTURE24: number;
+    readonly TEXTURE25: number;
+    readonly TEXTURE26: number;
+    readonly TEXTURE27: number;
+    readonly TEXTURE28: number;
+    readonly TEXTURE29: number;
+    readonly TEXTURE3: number;
+    readonly TEXTURE30: number;
+    readonly TEXTURE31: number;
+    readonly TEXTURE4: number;
+    readonly TEXTURE5: number;
+    readonly TEXTURE6: number;
+    readonly TEXTURE7: number;
+    readonly TEXTURE8: number;
+    readonly TEXTURE9: number;
+    readonly TRIANGLE_FAN: number;
+    readonly TRIANGLE_STRIP: number;
+    readonly TRIANGLES: number;
+    readonly UNPACK_ALIGNMENT: number;
+    readonly UNPACK_COLORSPACE_CONVERSION_WEBGL: number;
+    readonly UNPACK_FLIP_Y_WEBGL: number;
+    readonly UNPACK_PREMULTIPLY_ALPHA_WEBGL: number;
+    readonly UNSIGNED_BYTE: number;
+    readonly UNSIGNED_INT: number;
+    readonly UNSIGNED_SHORT: number;
+    readonly UNSIGNED_SHORT_4_4_4_4: number;
+    readonly UNSIGNED_SHORT_5_5_5_1: number;
+    readonly UNSIGNED_SHORT_5_6_5: number;
+    readonly VALIDATE_STATUS: number;
+    readonly VENDOR: number;
+    readonly VERSION: number;
+    readonly VERTEX_ATTRIB_ARRAY_BUFFER_BINDING: number;
+    readonly VERTEX_ATTRIB_ARRAY_ENABLED: number;
+    readonly VERTEX_ATTRIB_ARRAY_NORMALIZED: number;
+    readonly VERTEX_ATTRIB_ARRAY_POINTER: number;
+    readonly VERTEX_ATTRIB_ARRAY_SIZE: number;
+    readonly VERTEX_ATTRIB_ARRAY_STRIDE: number;
+    readonly VERTEX_ATTRIB_ARRAY_TYPE: number;
+    readonly VERTEX_SHADER: number;
+    readonly VIEWPORT: number;
+    readonly ZERO: number;
+};
+
+interface WebGLShader extends WebGLObject {
+}
+
+declare var WebGLShader: {
+    prototype: WebGLShader;
+    new(): WebGLShader;
+};
+
+interface WebGLShaderPrecisionFormat {
+    readonly precision: number;
+    readonly rangeMax: number;
+    readonly rangeMin: number;
+}
+
+declare var WebGLShaderPrecisionFormat: {
+    prototype: WebGLShaderPrecisionFormat;
+    new(): WebGLShaderPrecisionFormat;
+};
+
+interface WebGLTexture extends WebGLObject {
+}
+
+declare var WebGLTexture: {
+    prototype: WebGLTexture;
+    new(): WebGLTexture;
+};
+
+interface WebGLUniformLocation {
+}
+
+declare var WebGLUniformLocation: {
+    prototype: WebGLUniformLocation;
+    new(): WebGLUniformLocation;
+};
+
+interface WebKitCSSMatrix {
+    a: number;
+    b: number;
+    c: number;
+    d: number;
+    e: number;
+    f: number;
+    m11: number;
+    m12: number;
+    m13: number;
+    m14: number;
+    m21: number;
+    m22: number;
+    m23: number;
+    m24: number;
+    m31: number;
+    m32: number;
+    m33: number;
+    m34: number;
+    m41: number;
+    m42: number;
+    m43: number;
+    m44: number;
+    inverse(): WebKitCSSMatrix;
+    multiply(secondMatrix: WebKitCSSMatrix): WebKitCSSMatrix;
+    rotate(angleX: number, angleY?: number, angleZ?: number): WebKitCSSMatrix;
+    rotateAxisAngle(x: number, y: number, z: number, angle: number): WebKitCSSMatrix;
+    scale(scaleX: number, scaleY?: number, scaleZ?: number): WebKitCSSMatrix;
+    setMatrixValue(value: string): void;
+    skewX(angle: number): WebKitCSSMatrix;
+    skewY(angle: number): WebKitCSSMatrix;
+    toString(): string;
+    translate(x: number, y: number, z?: number): WebKitCSSMatrix;
+}
+
+declare var WebKitCSSMatrix: {
+    prototype: WebKitCSSMatrix;
+    new(text?: string): WebKitCSSMatrix;
+};
+
+interface WebKitDirectoryEntry extends WebKitEntry {
+    createReader(): WebKitDirectoryReader;
+}
+
+declare var WebKitDirectoryEntry: {
+    prototype: WebKitDirectoryEntry;
+    new(): WebKitDirectoryEntry;
+};
+
+interface WebKitDirectoryReader {
+    readEntries(successCallback: WebKitEntriesCallback, errorCallback?: WebKitErrorCallback): void;
+}
+
+declare var WebKitDirectoryReader: {
+    prototype: WebKitDirectoryReader;
+    new(): WebKitDirectoryReader;
+};
+
+interface WebKitEntry {
+    readonly filesystem: WebKitFileSystem;
+    readonly fullPath: string;
+    readonly isDirectory: boolean;
+    readonly isFile: boolean;
+    readonly name: string;
+}
+
+declare var WebKitEntry: {
+    prototype: WebKitEntry;
+    new(): WebKitEntry;
+};
+
+interface WebKitFileEntry extends WebKitEntry {
+    file(successCallback: WebKitFileCallback, errorCallback?: WebKitErrorCallback): void;
+}
+
+declare var WebKitFileEntry: {
+    prototype: WebKitFileEntry;
+    new(): WebKitFileEntry;
+};
+
+interface WebKitFileSystem {
+    readonly name: string;
+    readonly root: WebKitDirectoryEntry;
+}
+
+declare var WebKitFileSystem: {
+    prototype: WebKitFileSystem;
+    new(): WebKitFileSystem;
+};
+
+interface WebKitPoint {
+    x: number;
+    y: number;
+}
+
+declare var WebKitPoint: {
+    prototype: WebKitPoint;
+    new(x?: number, y?: number): WebKitPoint;
+};
+
+interface webkitRTCPeerConnection extends RTCPeerConnection {
+    addEventListener<K extends keyof RTCPeerConnectionEventMap>(type: K, listener: (this: webkitRTCPeerConnection, ev: RTCPeerConnectionEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var webkitRTCPeerConnection: {
+    prototype: webkitRTCPeerConnection;
+    new(configuration: RTCConfiguration): webkitRTCPeerConnection;
+};
+
+interface WebSocketEventMap {
+    "close": CloseEvent;
+    "error": Event;
+    "message": MessageEvent;
+    "open": Event;
+}
+
+interface WebSocket extends EventTarget {
+    binaryType: string;
+    readonly bufferedAmount: number;
+    readonly extensions: string;
+    onclose: (this: WebSocket, ev: CloseEvent) => any;
+    onerror: (this: WebSocket, ev: Event) => any;
+    onmessage: (this: WebSocket, ev: MessageEvent) => any;
+    onopen: (this: WebSocket, ev: Event) => any;
+    readonly protocol: string;
+    readonly readyState: number;
+    readonly url: string;
+    close(code?: number, reason?: string): void;
+    send(data: any): void;
+    readonly CLOSED: number;
+    readonly CLOSING: number;
+    readonly CONNECTING: number;
+    readonly OPEN: number;
+    addEventListener<K extends keyof WebSocketEventMap>(type: K, listener: (this: WebSocket, ev: WebSocketEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var WebSocket: {
+    prototype: WebSocket;
+    new(url: string, protocols?: string | string[]): WebSocket;
+    readonly CLOSED: number;
+    readonly CLOSING: number;
+    readonly CONNECTING: number;
+    readonly OPEN: number;
+};
+
+interface WheelEvent extends MouseEvent {
+    readonly deltaMode: number;
+    readonly deltaX: number;
+    readonly deltaY: number;
+    readonly deltaZ: number;
+    readonly wheelDelta: number;
+    readonly wheelDeltaX: number;
+    readonly wheelDeltaY: number;
+    getCurrentPoint(element: Element): void;
+    initWheelEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, buttonArg: number, relatedTargetArg: EventTarget, modifiersListArg: string, deltaXArg: number, deltaYArg: number, deltaZArg: number, deltaMode: number): void;
+    readonly DOM_DELTA_LINE: number;
+    readonly DOM_DELTA_PAGE: number;
+    readonly DOM_DELTA_PIXEL: number;
+}
+
+declare var WheelEvent: {
+    prototype: WheelEvent;
+    new(typeArg: string, eventInitDict?: WheelEventInit): WheelEvent;
+    readonly DOM_DELTA_LINE: number;
+    readonly DOM_DELTA_PAGE: number;
+    readonly DOM_DELTA_PIXEL: number;
+};
+
+interface WindowEventMap extends GlobalEventHandlersEventMap {
+    "abort": UIEvent;
+    "afterprint": Event;
+    "beforeprint": Event;
+    "beforeunload": BeforeUnloadEvent;
+    "blur": FocusEvent;
+    "canplay": Event;
+    "canplaythrough": Event;
+    "change": Event;
+    "click": MouseEvent;
+    "compassneedscalibration": Event;
+    "contextmenu": PointerEvent;
+    "dblclick": MouseEvent;
+    "devicelight": DeviceLightEvent;
+    "devicemotion": DeviceMotionEvent;
+    "deviceorientation": DeviceOrientationEvent;
+    "drag": DragEvent;
+    "dragend": DragEvent;
+    "dragenter": DragEvent;
+    "dragleave": DragEvent;
+    "dragover": DragEvent;
+    "dragstart": DragEvent;
+    "drop": DragEvent;
+    "durationchange": Event;
+    "emptied": Event;
+    "ended": MediaStreamErrorEvent;
+    "error": ErrorEvent;
+    "focus": FocusEvent;
+    "hashchange": HashChangeEvent;
+    "input": Event;
+    "invalid": Event;
+    "keydown": KeyboardEvent;
+    "keypress": KeyboardEvent;
+    "keyup": KeyboardEvent;
+    "load": Event;
+    "loadeddata": Event;
+    "loadedmetadata": Event;
+    "loadstart": Event;
+    "message": MessageEvent;
+    "mousedown": MouseEvent;
+    "mouseenter": MouseEvent;
+    "mouseleave": MouseEvent;
+    "mousemove": MouseEvent;
+    "mouseout": MouseEvent;
+    "mouseover": MouseEvent;
+    "mouseup": MouseEvent;
+    "mousewheel": WheelEvent;
+    "MSGestureChange": MSGestureEvent;
+    "MSGestureDoubleTap": MSGestureEvent;
+    "MSGestureEnd": MSGestureEvent;
+    "MSGestureHold": MSGestureEvent;
+    "MSGestureStart": MSGestureEvent;
+    "MSGestureTap": MSGestureEvent;
+    "MSInertiaStart": MSGestureEvent;
+    "MSPointerCancel": MSPointerEvent;
+    "MSPointerDown": MSPointerEvent;
+    "MSPointerEnter": MSPointerEvent;
+    "MSPointerLeave": MSPointerEvent;
+    "MSPointerMove": MSPointerEvent;
+    "MSPointerOut": MSPointerEvent;
+    "MSPointerOver": MSPointerEvent;
+    "MSPointerUp": MSPointerEvent;
+    "offline": Event;
+    "online": Event;
+    "orientationchange": Event;
+    "pagehide": PageTransitionEvent;
+    "pageshow": PageTransitionEvent;
+    "pause": Event;
+    "play": Event;
+    "playing": Event;
+    "popstate": PopStateEvent;
+    "progress": ProgressEvent;
+    "ratechange": Event;
+    "readystatechange": ProgressEvent;
+    "reset": Event;
+    "resize": UIEvent;
+    "scroll": UIEvent;
+    "seeked": Event;
+    "seeking": Event;
+    "select": UIEvent;
+    "stalled": Event;
+    "storage": StorageEvent;
+    "submit": Event;
+    "suspend": Event;
+    "timeupdate": Event;
+    "touchcancel": TouchEvent;
+    "touchend": TouchEvent;
+    "touchmove": TouchEvent;
+    "touchstart": TouchEvent;
+    "unload": Event;
+    "volumechange": Event;
+    "waiting": Event;
+}
+
+interface Window extends EventTarget, WindowTimers, WindowSessionStorage, WindowLocalStorage, WindowConsole, GlobalEventHandlers, IDBEnvironment, WindowBase64, GlobalFetch {
+    readonly applicationCache: ApplicationCache;
+    readonly caches: CacheStorage;
+    readonly clientInformation: Navigator;
+    readonly closed: boolean;
+    readonly crypto: Crypto;
+    defaultStatus: string;
+    readonly devicePixelRatio: number;
+    readonly document: Document;
+    readonly doNotTrack: string;
+    event: Event | undefined;
+    readonly external: External;
+    readonly frameElement: Element;
+    readonly frames: Window;
+    readonly history: History;
+    readonly innerHeight: number;
+    readonly innerWidth: number;
+    readonly isSecureContext: boolean;
+    readonly length: number;
+    readonly location: Location;
+    readonly locationbar: BarProp;
+    readonly menubar: BarProp;
+    readonly msContentScript: ExtensionScriptApis;
+    readonly msCredentials: MSCredentials;
+    name: string;
+    readonly navigator: Navigator;
+    offscreenBuffering: string | boolean;
+    onabort: (this: Window, ev: UIEvent) => any;
+    onafterprint: (this: Window, ev: Event) => any;
+    onbeforeprint: (this: Window, ev: Event) => any;
+    onbeforeunload: (this: Window, ev: BeforeUnloadEvent) => any;
+    onblur: (this: Window, ev: FocusEvent) => any;
+    oncanplay: (this: Window, ev: Event) => any;
+    oncanplaythrough: (this: Window, ev: Event) => any;
+    onchange: (this: Window, ev: Event) => any;
+    onclick: (this: Window, ev: MouseEvent) => any;
+    oncompassneedscalibration: (this: Window, ev: Event) => any;
+    oncontextmenu: (this: Window, ev: PointerEvent) => any;
+    ondblclick: (this: Window, ev: MouseEvent) => any;
+    ondevicelight: (this: Window, ev: DeviceLightEvent) => any;
+    ondevicemotion: (this: Window, ev: DeviceMotionEvent) => any;
+    ondeviceorientation: (this: Window, ev: DeviceOrientationEvent) => any;
+    ondrag: (this: Window, ev: DragEvent) => any;
+    ondragend: (this: Window, ev: DragEvent) => any;
+    ondragenter: (this: Window, ev: DragEvent) => any;
+    ondragleave: (this: Window, ev: DragEvent) => any;
+    ondragover: (this: Window, ev: DragEvent) => any;
+    ondragstart: (this: Window, ev: DragEvent) => any;
+    ondrop: (this: Window, ev: DragEvent) => any;
+    ondurationchange: (this: Window, ev: Event) => any;
+    onemptied: (this: Window, ev: Event) => any;
+    onended: (this: Window, ev: MediaStreamErrorEvent) => any;
+    onerror: ErrorEventHandler;
+    onfocus: (this: Window, ev: FocusEvent) => any;
+    onhashchange: (this: Window, ev: HashChangeEvent) => any;
+    oninput: (this: Window, ev: Event) => any;
+    oninvalid: (this: Window, ev: Event) => any;
+    onkeydown: (this: Window, ev: KeyboardEvent) => any;
+    onkeypress: (this: Window, ev: KeyboardEvent) => any;
+    onkeyup: (this: Window, ev: KeyboardEvent) => any;
+    onload: (this: Window, ev: Event) => any;
+    onloadeddata: (this: Window, ev: Event) => any;
+    onloadedmetadata: (this: Window, ev: Event) => any;
+    onloadstart: (this: Window, ev: Event) => any;
+    onmessage: (this: Window, ev: MessageEvent) => any;
+    onmousedown: (this: Window, ev: MouseEvent) => any;
+    onmouseenter: (this: Window, ev: MouseEvent) => any;
+    onmouseleave: (this: Window, ev: MouseEvent) => any;
+    onmousemove: (this: Window, ev: MouseEvent) => any;
+    onmouseout: (this: Window, ev: MouseEvent) => any;
+    onmouseover: (this: Window, ev: MouseEvent) => any;
+    onmouseup: (this: Window, ev: MouseEvent) => any;
+    onmousewheel: (this: Window, ev: WheelEvent) => any;
+    onmsgesturechange: (this: Window, ev: MSGestureEvent) => any;
+    onmsgesturedoubletap: (this: Window, ev: MSGestureEvent) => any;
+    onmsgestureend: (this: Window, ev: MSGestureEvent) => any;
+    onmsgesturehold: (this: Window, ev: MSGestureEvent) => any;
+    onmsgesturestart: (this: Window, ev: MSGestureEvent) => any;
+    onmsgesturetap: (this: Window, ev: MSGestureEvent) => any;
+    onmsinertiastart: (this: Window, ev: MSGestureEvent) => any;
+    onmspointercancel: (this: Window, ev: MSPointerEvent) => any;
+    onmspointerdown: (this: Window, ev: MSPointerEvent) => any;
+    onmspointerenter: (this: Window, ev: MSPointerEvent) => any;
+    onmspointerleave: (this: Window, ev: MSPointerEvent) => any;
+    onmspointermove: (this: Window, ev: MSPointerEvent) => any;
+    onmspointerout: (this: Window, ev: MSPointerEvent) => any;
+    onmspointerover: (this: Window, ev: MSPointerEvent) => any;
+    onmspointerup: (this: Window, ev: MSPointerEvent) => any;
+    onoffline: (this: Window, ev: Event) => any;
+    ononline: (this: Window, ev: Event) => any;
+    onorientationchange: (this: Window, ev: Event) => any;
+    onpagehide: (this: Window, ev: PageTransitionEvent) => any;
+    onpageshow: (this: Window, ev: PageTransitionEvent) => any;
+    onpause: (this: Window, ev: Event) => any;
+    onplay: (this: Window, ev: Event) => any;
+    onplaying: (this: Window, ev: Event) => any;
+    onpopstate: (this: Window, ev: PopStateEvent) => any;
+    onprogress: (this: Window, ev: ProgressEvent) => any;
+    onratechange: (this: Window, ev: Event) => any;
+    onreadystatechange: (this: Window, ev: ProgressEvent) => any;
+    onreset: (this: Window, ev: Event) => any;
+    onresize: (this: Window, ev: UIEvent) => any;
+    onscroll: (this: Window, ev: UIEvent) => any;
+    onseeked: (this: Window, ev: Event) => any;
+    onseeking: (this: Window, ev: Event) => any;
+    onselect: (this: Window, ev: UIEvent) => any;
+    onstalled: (this: Window, ev: Event) => any;
+    onstorage: (this: Window, ev: StorageEvent) => any;
+    onsubmit: (this: Window, ev: Event) => any;
+    onsuspend: (this: Window, ev: Event) => any;
+    ontimeupdate: (this: Window, ev: Event) => any;
+    ontouchcancel: (ev: TouchEvent) => any;
+    ontouchend: (ev: TouchEvent) => any;
+    ontouchmove: (ev: TouchEvent) => any;
+    ontouchstart: (ev: TouchEvent) => any;
+    onunload: (this: Window, ev: Event) => any;
+    onvolumechange: (this: Window, ev: Event) => any;
+    onwaiting: (this: Window, ev: Event) => any;
+    opener: any;
+    orientation: string | number;
+    readonly outerHeight: number;
+    readonly outerWidth: number;
+    readonly pageXOffset: number;
+    readonly pageYOffset: number;
+    readonly parent: Window;
+    readonly performance: Performance;
+    readonly personalbar: BarProp;
+    readonly screen: Screen;
+    readonly screenLeft: number;
+    readonly screenTop: number;
+    readonly screenX: number;
+    readonly screenY: number;
+    readonly scrollbars: BarProp;
+    readonly scrollX: number;
+    readonly scrollY: number;
+    readonly self: Window;
+    readonly speechSynthesis: SpeechSynthesis;
+    status: string;
+    readonly statusbar: BarProp;
+    readonly styleMedia: StyleMedia;
+    readonly toolbar: BarProp;
+    readonly top: Window;
+    readonly window: Window;
+    URL: typeof URL;
+    URLSearchParams: typeof URLSearchParams;
+    Blob: typeof Blob;
+    customElements: CustomElementRegistry;
+    alert(message?: any): void;
+    blur(): void;
+    cancelAnimationFrame(handle: number): void;
+    captureEvents(): void;
+    close(): void;
+    confirm(message?: string): boolean;
+    departFocus(navigationReason: NavigationReason, origin: FocusNavigationOrigin): void;
+    focus(): void;
+    getComputedStyle(elt: Element, pseudoElt?: string): CSSStyleDeclaration;
+    getMatchedCSSRules(elt: Element, pseudoElt?: string): CSSRuleList;
+    getSelection(): Selection;
+    matchMedia(mediaQuery: string): MediaQueryList;
+    moveBy(x?: number, y?: number): void;
+    moveTo(x?: number, y?: number): void;
+    msWriteProfilerMark(profilerMarkName: string): void;
+    open(url?: string, target?: string, features?: string, replace?: boolean): Window;
+    postMessage(message: any, targetOrigin: string, transfer?: any[]): void;
+    print(): void;
+    prompt(message?: string, _default?: string): string | null;
+    releaseEvents(): void;
+    requestAnimationFrame(callback: FrameRequestCallback): number;
+    resizeBy(x?: number, y?: number): void;
+    resizeTo(x?: number, y?: number): void;
+    scroll(x?: number, y?: number): void;
+    scrollBy(x?: number, y?: number): void;
+    scrollTo(x?: number, y?: number): void;
+    stop(): void;
+    webkitCancelAnimationFrame(handle: number): void;
+    webkitConvertPointFromNodeToPage(node: Node, pt: WebKitPoint): WebKitPoint;
+    webkitConvertPointFromPageToNode(node: Node, pt: WebKitPoint): WebKitPoint;
+    webkitRequestAnimationFrame(callback: FrameRequestCallback): number;
+    createImageBitmap(image: HTMLImageElement | SVGImageElement | HTMLVideoElement | HTMLCanvasElement | ImageBitmap | ImageData | Blob, options?: ImageBitmapOptions): Promise<ImageBitmap>;
+    createImageBitmap(image: HTMLImageElement | SVGImageElement | HTMLVideoElement | HTMLCanvasElement | ImageBitmap | ImageData | Blob, sx: number, sy: number, sw: number, sh: number, options?: ImageBitmapOptions): Promise<ImageBitmap>;
+    scroll(options?: ScrollToOptions): void;
+    scrollTo(options?: ScrollToOptions): void;
+    scrollBy(options?: ScrollToOptions): void;
+    addEventListener<K extends keyof WindowEventMap>(type: K, listener: (this: Window, ev: WindowEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var Window: {
+    prototype: Window;
+    new(): Window;
+};
+
+interface WorkerEventMap extends AbstractWorkerEventMap {
+    "message": MessageEvent;
+}
+
+interface Worker extends EventTarget, AbstractWorker {
+    onmessage: (this: Worker, ev: MessageEvent) => any;
+    postMessage(message: any, transfer?: any[]): void;
+    terminate(): void;
+    addEventListener<K extends keyof WorkerEventMap>(type: K, listener: (this: Worker, ev: WorkerEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var Worker: {
+    prototype: Worker;
+    new(stringUrl: string): Worker;
+};
+
+interface XMLDocument extends Document {
+    addEventListener<K extends keyof DocumentEventMap>(type: K, listener: (this: XMLDocument, ev: DocumentEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var XMLDocument: {
+    prototype: XMLDocument;
+    new(): XMLDocument;
+};
+
+interface XMLHttpRequestEventMap extends XMLHttpRequestEventTargetEventMap {
+    "readystatechange": Event;
+}
+
+interface XMLHttpRequest extends EventTarget, XMLHttpRequestEventTarget {
+    onreadystatechange: (this: XMLHttpRequest, ev: Event) => any;
+    readonly readyState: number;
+    readonly response: any;
+    readonly responseText: string;
+    responseType: XMLHttpRequestResponseType;
+    readonly responseURL: string;
+    readonly responseXML: Document | null;
+    readonly status: number;
+    readonly statusText: string;
+    timeout: number;
+    readonly upload: XMLHttpRequestUpload;
+    withCredentials: boolean;
+    msCaching?: string;
+    abort(): void;
+    getAllResponseHeaders(): string;
+    getResponseHeader(header: string): string | null;
+    msCachingEnabled(): boolean;
+    open(method: string, url: string, async?: boolean, user?: string, password?: string): void;
+    overrideMimeType(mime: string): void;
+    send(data?: Document): void;
+    send(data?: string): void;
+    send(data?: any): void;
+    setRequestHeader(header: string, value: string): void;
+    readonly DONE: number;
+    readonly HEADERS_RECEIVED: number;
+    readonly LOADING: number;
+    readonly OPENED: number;
+    readonly UNSENT: number;
+    addEventListener<K extends keyof XMLHttpRequestEventMap>(type: K, listener: (this: XMLHttpRequest, ev: XMLHttpRequestEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var XMLHttpRequest: {
+    prototype: XMLHttpRequest;
+    new(): XMLHttpRequest;
+    readonly DONE: number;
+    readonly HEADERS_RECEIVED: number;
+    readonly LOADING: number;
+    readonly OPENED: number;
+    readonly UNSENT: number;
+};
+
+interface XMLHttpRequestUpload extends EventTarget, XMLHttpRequestEventTarget {
+    addEventListener<K extends keyof XMLHttpRequestEventTargetEventMap>(type: K, listener: (this: XMLHttpRequestUpload, ev: XMLHttpRequestEventTargetEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var XMLHttpRequestUpload: {
+    prototype: XMLHttpRequestUpload;
+    new(): XMLHttpRequestUpload;
+};
+
+interface XMLSerializer {
+    serializeToString(target: Node): string;
+}
+
+declare var XMLSerializer: {
+    prototype: XMLSerializer;
+    new(): XMLSerializer;
+};
+
+interface XPathEvaluator {
+    createExpression(expression: string, resolver: XPathNSResolver): XPathExpression;
+    createNSResolver(nodeResolver?: Node): XPathNSResolver;
+    evaluate(expression: string, contextNode: Node, resolver: XPathNSResolver | null, type: number, result: XPathResult | null): XPathResult;
+}
+
+declare var XPathEvaluator: {
+    prototype: XPathEvaluator;
+    new(): XPathEvaluator;
+};
+
+interface XPathExpression {
+    evaluate(contextNode: Node, type: number, result: XPathResult | null): XPathResult;
+}
+
+declare var XPathExpression: {
+    prototype: XPathExpression;
+    new(): XPathExpression;
+};
+
+interface XPathNSResolver {
+    lookupNamespaceURI(prefix: string): string;
+}
+
+declare var XPathNSResolver: {
+    prototype: XPathNSResolver;
+    new(): XPathNSResolver;
+};
+
+interface XPathResult {
+    readonly booleanValue: boolean;
+    readonly invalidIteratorState: boolean;
+    readonly numberValue: number;
+    readonly resultType: number;
+    readonly singleNodeValue: Node;
+    readonly snapshotLength: number;
+    readonly stringValue: string;
+    iterateNext(): Node;
+    snapshotItem(index: number): Node;
+    readonly ANY_TYPE: number;
+    readonly ANY_UNORDERED_NODE_TYPE: number;
+    readonly BOOLEAN_TYPE: number;
+    readonly FIRST_ORDERED_NODE_TYPE: number;
+    readonly NUMBER_TYPE: number;
+    readonly ORDERED_NODE_ITERATOR_TYPE: number;
+    readonly ORDERED_NODE_SNAPSHOT_TYPE: number;
+    readonly STRING_TYPE: number;
+    readonly UNORDERED_NODE_ITERATOR_TYPE: number;
+    readonly UNORDERED_NODE_SNAPSHOT_TYPE: number;
+}
+
+declare var XPathResult: {
+    prototype: XPathResult;
+    new(): XPathResult;
+    readonly ANY_TYPE: number;
+    readonly ANY_UNORDERED_NODE_TYPE: number;
+    readonly BOOLEAN_TYPE: number;
+    readonly FIRST_ORDERED_NODE_TYPE: number;
+    readonly NUMBER_TYPE: number;
+    readonly ORDERED_NODE_ITERATOR_TYPE: number;
+    readonly ORDERED_NODE_SNAPSHOT_TYPE: number;
+    readonly STRING_TYPE: number;
+    readonly UNORDERED_NODE_ITERATOR_TYPE: number;
+    readonly UNORDERED_NODE_SNAPSHOT_TYPE: number;
+};
+
+interface XSLTProcessor {
+    clearParameters(): void;
+    getParameter(namespaceURI: string, localName: string): any;
+    importStylesheet(style: Node): void;
+    removeParameter(namespaceURI: string, localName: string): void;
+    reset(): void;
+    setParameter(namespaceURI: string, localName: string, value: any): void;
+    transformToDocument(source: Node): Document;
+    transformToFragment(source: Node, document: Document): DocumentFragment;
+}
+
+declare var XSLTProcessor: {
+    prototype: XSLTProcessor;
+    new(): XSLTProcessor;
+};
+
+interface AbstractWorkerEventMap {
+    "error": ErrorEvent;
+}
+
+interface AbstractWorker {
+    onerror: (this: AbstractWorker, ev: ErrorEvent) => any;
+    addEventListener<K extends keyof AbstractWorkerEventMap>(type: K, listener: (this: AbstractWorker, ev: AbstractWorkerEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+interface Body {
+    readonly bodyUsed: boolean;
+    arrayBuffer(): Promise<ArrayBuffer>;
+    blob(): Promise<Blob>;
+    json(): Promise<any>;
+    text(): Promise<string>;
+    formData(): Promise<FormData>;
+}
+
+interface CanvasPathMethods {
+    arc(x: number, y: number, radius: number, startAngle: number, endAngle: number, anticlockwise?: boolean): void;
+    arcTo(x1: number, y1: number, x2: number, y2: number, radius: number): void;
+    bezierCurveTo(cp1x: number, cp1y: number, cp2x: number, cp2y: number, x: number, y: number): void;
+    closePath(): void;
+    ellipse(x: number, y: number, radiusX: number, radiusY: number, rotation: number, startAngle: number, endAngle: number, anticlockwise?: boolean): void;
+    lineTo(x: number, y: number): void;
+    moveTo(x: number, y: number): void;
+    quadraticCurveTo(cpx: number, cpy: number, x: number, y: number): void;
+    rect(x: number, y: number, w: number, h: number): void;
+}
+
+interface ChildNode {
+    remove(): void;
+}
+
+interface DocumentEvent {
+    createEvent(eventInterface: "AnimationEvent"): AnimationEvent;
+    createEvent(eventInterface: "AudioProcessingEvent"): AudioProcessingEvent;
+    createEvent(eventInterface: "BeforeUnloadEvent"): BeforeUnloadEvent;
+    createEvent(eventInterface: "ClipboardEvent"): ClipboardEvent;
+    createEvent(eventInterface: "CloseEvent"): CloseEvent;
+    createEvent(eventInterface: "CompositionEvent"): CompositionEvent;
+    createEvent(eventInterface: "CustomEvent"): CustomEvent;
+    createEvent(eventInterface: "DeviceLightEvent"): DeviceLightEvent;
+    createEvent(eventInterface: "DeviceMotionEvent"): DeviceMotionEvent;
+    createEvent(eventInterface: "DeviceOrientationEvent"): DeviceOrientationEvent;
+    createEvent(eventInterface: "DragEvent"): DragEvent;
+    createEvent(eventInterface: "ErrorEvent"): ErrorEvent;
+    createEvent(eventInterface: "Event"): Event;
+    createEvent(eventInterface: "Events"): Event;
+    createEvent(eventInterface: "FocusEvent"): FocusEvent;
+    createEvent(eventInterface: "FocusNavigationEvent"): FocusNavigationEvent;
+    createEvent(eventInterface: "GamepadEvent"): GamepadEvent;
+    createEvent(eventInterface: "HashChangeEvent"): HashChangeEvent;
+    createEvent(eventInterface: "IDBVersionChangeEvent"): IDBVersionChangeEvent;
+    createEvent(eventInterface: "KeyboardEvent"): KeyboardEvent;
+    createEvent(eventInterface: "ListeningStateChangedEvent"): ListeningStateChangedEvent;
+    createEvent(eventInterface: "LongRunningScriptDetectedEvent"): LongRunningScriptDetectedEvent;
+    createEvent(eventInterface: "MSGestureEvent"): MSGestureEvent;
+    createEvent(eventInterface: "MSManipulationEvent"): MSManipulationEvent;
+    createEvent(eventInterface: "MSMediaKeyMessageEvent"): MSMediaKeyMessageEvent;
+    createEvent(eventInterface: "MSMediaKeyNeededEvent"): MSMediaKeyNeededEvent;
+    createEvent(eventInterface: "MSPointerEvent"): MSPointerEvent;
+    createEvent(eventInterface: "MSSiteModeEvent"): MSSiteModeEvent;
+    createEvent(eventInterface: "MediaEncryptedEvent"): MediaEncryptedEvent;
+    createEvent(eventInterface: "MediaKeyMessageEvent"): MediaKeyMessageEvent;
+    createEvent(eventInterface: "MediaStreamErrorEvent"): MediaStreamErrorEvent;
+    createEvent(eventInterface: "MediaStreamEvent"): MediaStreamEvent;
+    createEvent(eventInterface: "MediaStreamTrackEvent"): MediaStreamTrackEvent;
+    createEvent(eventInterface: "MessageEvent"): MessageEvent;
+    createEvent(eventInterface: "MouseEvent"): MouseEvent;
+    createEvent(eventInterface: "MouseEvents"): MouseEvent;
+    createEvent(eventInterface: "MutationEvent"): MutationEvent;
+    createEvent(eventInterface: "MutationEvents"): MutationEvent;
+    createEvent(eventInterface: "NavigationCompletedEvent"): NavigationCompletedEvent;
+    createEvent(eventInterface: "NavigationEvent"): NavigationEvent;
+    createEvent(eventInterface: "NavigationEventWithReferrer"): NavigationEventWithReferrer;
+    createEvent(eventInterface: "OfflineAudioCompletionEvent"): OfflineAudioCompletionEvent;
+    createEvent(eventInterface: "OverflowEvent"): OverflowEvent;
+    createEvent(eventInterface: "PageTransitionEvent"): PageTransitionEvent;
+    createEvent(eventInterface: "PaymentRequestUpdateEvent"): PaymentRequestUpdateEvent;
+    createEvent(eventInterface: "PermissionRequestedEvent"): PermissionRequestedEvent;
+    createEvent(eventInterface: "PointerEvent"): PointerEvent;
+    createEvent(eventInterface: "PopStateEvent"): PopStateEvent;
+    createEvent(eventInterface: "ProgressEvent"): ProgressEvent;
+    createEvent(eventInterface: "RTCDTMFToneChangeEvent"): RTCDTMFToneChangeEvent;
+    createEvent(eventInterface: "RTCDtlsTransportStateChangedEvent"): RTCDtlsTransportStateChangedEvent;
+    createEvent(eventInterface: "RTCIceCandidatePairChangedEvent"): RTCIceCandidatePairChangedEvent;
+    createEvent(eventInterface: "RTCIceGathererEvent"): RTCIceGathererEvent;
+    createEvent(eventInterface: "RTCIceTransportStateChangedEvent"): RTCIceTransportStateChangedEvent;
+    createEvent(eventInterface: "RTCPeerConnectionIceEvent"): RTCPeerConnectionIceEvent;
+    createEvent(eventInterface: "RTCSsrcConflictEvent"): RTCSsrcConflictEvent;
+    createEvent(eventInterface: "SVGZoomEvent"): SVGZoomEvent;
+    createEvent(eventInterface: "SVGZoomEvents"): SVGZoomEvent;
+    createEvent(eventInterface: "ScriptNotifyEvent"): ScriptNotifyEvent;
+    createEvent(eventInterface: "ServiceWorkerMessageEvent"): ServiceWorkerMessageEvent;
+    createEvent(eventInterface: "SpeechSynthesisEvent"): SpeechSynthesisEvent;
+    createEvent(eventInterface: "StorageEvent"): StorageEvent;
+    createEvent(eventInterface: "TextEvent"): TextEvent;
+    createEvent(eventInterface: "TouchEvent"): TouchEvent;
+    createEvent(eventInterface: "TrackEvent"): TrackEvent;
+    createEvent(eventInterface: "TransitionEvent"): TransitionEvent;
+    createEvent(eventInterface: "UIEvent"): UIEvent;
+    createEvent(eventInterface: "UIEvents"): UIEvent;
+    createEvent(eventInterface: "UnviewableContentIdentifiedEvent"): UnviewableContentIdentifiedEvent;
+    createEvent(eventInterface: "WebGLContextEvent"): WebGLContextEvent;
+    createEvent(eventInterface: "WheelEvent"): WheelEvent;
+    createEvent(eventInterface: string): Event;
+}
+
+interface DOML2DeprecatedColorProperty {
+    color: string;
+}
+
+interface DOML2DeprecatedSizeProperty {
+    size: number;
+}
+
+interface ElementTraversal {
+    readonly childElementCount: number;
+    readonly firstElementChild: Element | null;
+    readonly lastElementChild: Element | null;
+    readonly nextElementSibling: Element | null;
+    readonly previousElementSibling: Element | null;
+}
+
+interface GetSVGDocument {
+    getSVGDocument(): Document;
+}
+
+interface GlobalEventHandlersEventMap {
+    "pointercancel": PointerEvent;
+    "pointerdown": PointerEvent;
+    "pointerenter": PointerEvent;
+    "pointerleave": PointerEvent;
+    "pointermove": PointerEvent;
+    "pointerout": PointerEvent;
+    "pointerover": PointerEvent;
+    "pointerup": PointerEvent;
+    "wheel": WheelEvent;
+}
+
+interface GlobalEventHandlers {
+    onpointercancel: (this: GlobalEventHandlers, ev: PointerEvent) => any;
+    onpointerdown: (this: GlobalEventHandlers, ev: PointerEvent) => any;
+    onpointerenter: (this: GlobalEventHandlers, ev: PointerEvent) => any;
+    onpointerleave: (this: GlobalEventHandlers, ev: PointerEvent) => any;
+    onpointermove: (this: GlobalEventHandlers, ev: PointerEvent) => any;
+    onpointerout: (this: GlobalEventHandlers, ev: PointerEvent) => any;
+    onpointerover: (this: GlobalEventHandlers, ev: PointerEvent) => any;
+    onpointerup: (this: GlobalEventHandlers, ev: PointerEvent) => any;
+    onwheel: (this: GlobalEventHandlers, ev: WheelEvent) => any;
+    addEventListener<K extends keyof GlobalEventHandlersEventMap>(type: K, listener: (this: GlobalEventHandlers, ev: GlobalEventHandlersEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+interface GlobalFetch {
+    fetch(input: RequestInfo, init?: RequestInit): Promise<Response>;
+}
+
+interface HTMLTableAlignment {
+    /**
+     * Sets or retrieves a value that you can use to implement your own ch functionality for the object.
+     */
+    ch: string;
+    /**
+     * Sets or retrieves a value that you can use to implement your own chOff functionality for the object.
+     */
+    chOff: string;
+    /**
+     * Sets or retrieves how text and other content are vertically aligned within the object that contains them.
+     */
+    vAlign: string;
+}
+
+interface IDBEnvironment {
+    readonly indexedDB: IDBFactory;
+}
+
+interface LinkStyle {
+    readonly sheet: StyleSheet;
+}
+
+interface MSBaseReaderEventMap {
+    "abort": Event;
+    "error": ErrorEvent;
+    "load": Event;
+    "loadend": ProgressEvent;
+    "loadstart": Event;
+    "progress": ProgressEvent;
+}
+
+interface MSBaseReader {
+    onabort: (this: MSBaseReader, ev: Event) => any;
+    onerror: (this: MSBaseReader, ev: ErrorEvent) => any;
+    onload: (this: MSBaseReader, ev: Event) => any;
+    onloadend: (this: MSBaseReader, ev: ProgressEvent) => any;
+    onloadstart: (this: MSBaseReader, ev: Event) => any;
+    onprogress: (this: MSBaseReader, ev: ProgressEvent) => any;
+    readonly readyState: number;
+    readonly result: any;
+    abort(): void;
+    readonly DONE: number;
+    readonly EMPTY: number;
+    readonly LOADING: number;
+    addEventListener<K extends keyof MSBaseReaderEventMap>(type: K, listener: (this: MSBaseReader, ev: MSBaseReaderEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+interface MSFileSaver {
+    msSaveBlob(blob: any, defaultName?: string): boolean;
+    msSaveOrOpenBlob(blob: any, defaultName?: string): boolean;
+}
+
+interface MSNavigatorDoNotTrack {
+    confirmSiteSpecificTrackingException(args: ConfirmSiteSpecificExceptionsInformation): boolean;
+    confirmWebWideTrackingException(args: ExceptionInformation): boolean;
+    removeSiteSpecificTrackingException(args: ExceptionInformation): void;
+    removeWebWideTrackingException(args: ExceptionInformation): void;
+    storeSiteSpecificTrackingException(args: StoreSiteSpecificExceptionsInformation): void;
+    storeWebWideTrackingException(args: StoreExceptionsInformation): void;
+}
+
+interface NavigatorBeacon {
+    sendBeacon(url: USVString, data?: BodyInit): boolean;
+}
+
+interface NavigatorConcurrentHardware {
+    readonly hardwareConcurrency: number;
+}
+
+interface NavigatorContentUtils {
+}
+
+interface NavigatorGeolocation {
+    readonly geolocation: Geolocation;
+}
+
+interface NavigatorID {
+    readonly appCodeName: string;
+    readonly appName: string;
+    readonly appVersion: string;
+    readonly platform: string;
+    readonly product: string;
+    readonly productSub: string;
+    readonly userAgent: string;
+    readonly vendor: string;
+    readonly vendorSub: string;
+}
+
+interface NavigatorOnLine {
+    readonly onLine: boolean;
+}
+
+interface NavigatorStorageUtils {
+}
+
+interface NavigatorUserMedia {
+    readonly mediaDevices: MediaDevices;
+    getUserMedia(constraints: MediaStreamConstraints, successCallback: NavigatorUserMediaSuccessCallback, errorCallback: NavigatorUserMediaErrorCallback): void;
+}
+
+interface NodeSelector {
+    querySelector<K extends keyof ElementTagNameMap>(selectors: K): ElementTagNameMap[K] | null;
+    querySelector(selectors: string): Element | null;
+    querySelectorAll<K extends keyof ElementListTagNameMap>(selectors: K): ElementListTagNameMap[K];
+    querySelectorAll(selectors: string): NodeListOf<Element>;
+}
+
+interface RandomSource {
+    getRandomValues(array: ArrayBufferView): ArrayBufferView;
+}
+
+interface SVGAnimatedPoints {
+    readonly animatedPoints: SVGPointList;
+    readonly points: SVGPointList;
+}
+
+interface SVGFilterPrimitiveStandardAttributes {
+    readonly height: SVGAnimatedLength;
+    readonly result: SVGAnimatedString;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+}
+
+interface SVGFitToViewBox {
+    readonly preserveAspectRatio: SVGAnimatedPreserveAspectRatio;
+    readonly viewBox: SVGAnimatedRect;
+}
+
+interface SVGTests {
+    readonly requiredExtensions: SVGStringList;
+    readonly requiredFeatures: SVGStringList;
+    readonly systemLanguage: SVGStringList;
+    hasExtension(extension: string): boolean;
+}
+
+interface SVGURIReference {
+    readonly href: SVGAnimatedString;
+}
+
+interface WindowBase64 {
+    atob(encodedString: string): string;
+    btoa(rawString: string): string;
+}
+
+interface WindowConsole {
+    readonly console: Console;
+}
+
+interface WindowLocalStorage {
+    readonly localStorage: Storage;
+}
+
+interface WindowSessionStorage {
+    readonly sessionStorage: Storage;
+}
+
+interface WindowTimers extends Object, WindowTimersExtension {
+    clearInterval(handle: number): void;
+    clearTimeout(handle: number): void;
+    setInterval(handler: (...args: any[]) => void, timeout: number): number;
+    setInterval(handler: any, timeout?: any, ...args: any[]): number;
+    setTimeout(handler: (...args: any[]) => void, timeout: number): number;
+    setTimeout(handler: any, timeout?: any, ...args: any[]): number;
+}
+
+interface WindowTimersExtension {
+    clearImmediate(handle: number): void;
+    setImmediate(handler: (...args: any[]) => void): number;
+    setImmediate(handler: any, ...args: any[]): number;
+}
+
+interface XMLHttpRequestEventTargetEventMap {
+    "abort": Event;
+    "error": ErrorEvent;
+    "load": Event;
+    "loadend": ProgressEvent;
+    "loadstart": Event;
+    "progress": ProgressEvent;
+    "timeout": ProgressEvent;
+}
+
+interface XMLHttpRequestEventTarget {
+    onabort: (this: XMLHttpRequestEventTarget, ev: Event) => any;
+    onerror: (this: XMLHttpRequestEventTarget, ev: ErrorEvent) => any;
+    onload: (this: XMLHttpRequestEventTarget, ev: Event) => any;
+    onloadend: (this: XMLHttpRequestEventTarget, ev: ProgressEvent) => any;
+    onloadstart: (this: XMLHttpRequestEventTarget, ev: Event) => any;
+    onprogress: (this: XMLHttpRequestEventTarget, ev: ProgressEvent) => any;
+    ontimeout: (this: XMLHttpRequestEventTarget, ev: ProgressEvent) => any;
+    addEventListener<K extends keyof XMLHttpRequestEventTargetEventMap>(type: K, listener: (this: XMLHttpRequestEventTarget, ev: XMLHttpRequestEventTargetEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+interface ErrorEventInit {
+    message?: string;
+    filename?: string;
+    lineno?: number;
+    conlno?: number;
+    error?: any;
+}
+
+interface StorageEventInit extends EventInit {
+    key?: string;
+    oldValue?: string;
+    newValue?: string;
+    url: string;
+    storageArea?: Storage;
+}
+
+interface Canvas2DContextAttributes {
+    alpha?: boolean;
+    willReadFrequently?: boolean;
+    storage?: boolean;
+    [attribute: string]: boolean | string | undefined;
+}
+
+interface ImageBitmapOptions {
+    imageOrientation?: "none" | "flipY";
+    premultiplyAlpha?: "none" | "premultiply" | "default";
+    colorSpaceConversion?: "none" | "default";
+    resizeWidth?: number;
+    resizeHeight?: number;
+    resizeQuality?: "pixelated" | "low" | "medium" | "high";
+}
+
+interface ImageBitmap {
+    readonly width: number;
+    readonly height: number;
+    close(): void;
+}
+
+interface URLSearchParams {
+    /**
+     * Appends a specified key/value pair as a new search parameter.
+     */
+    append(name: string, value: string): void;
+    /**
+     * Deletes the given search parameter, and its associated value, from the list of all search parameters.
+     */
+    delete(name: string): void;
+    /**
+     * Returns the first value associated to the given search parameter.
+     */
+    get(name: string): string | null;
+    /**
+     * Returns all the values association with a given search parameter.
+     */
+    getAll(name: string): string[];
+    /**
+     * Returns a Boolean indicating if such a search parameter exists.
+     */
+    has(name: string): boolean;
+    /**
+     * Sets the value associated to a given search parameter to the given value. If there were several values, delete the others.
+     */
+    set(name: string, value: string): void;
+}
+
+declare var URLSearchParams: {
+    prototype: URLSearchParams;
+    /**
+     * Constructor returning a URLSearchParams object.
+     */
+    new (init?: string | URLSearchParams): URLSearchParams;
+};
+
+interface NodeListOf<TNode extends Node> extends NodeList {
+    length: number;
+    item(index: number): TNode;
+    [index: number]: TNode;
+}
+
+interface HTMLCollectionOf<T extends Element> extends HTMLCollection {
+    item(index: number): T;
+    namedItem(name: string): T;
+    [index: number]: T;
+}
+
+interface BlobPropertyBag {
+    type?: string;
+    endings?: string;
+}
+
+interface FilePropertyBag {
+    type?: string;
+    lastModified?: number;
+}
+
+interface EventListenerObject {
+    handleEvent(evt: Event): void;
+}
+
+interface ProgressEventInit extends EventInit {
+    lengthComputable?: boolean;
+    loaded?: number;
+    total?: number;
+}
+
+interface ScrollOptions {
+    behavior?: ScrollBehavior;
+}
+
+interface ScrollToOptions extends ScrollOptions {
+    left?: number;
+    top?: number;
+}
+
+interface ScrollIntoViewOptions extends ScrollOptions {
+    block?: ScrollLogicalPosition;
+    inline?: ScrollLogicalPosition;
+}
+
+interface ClipboardEventInit extends EventInit {
+    data?: string;
+    dataType?: string;
+}
+
+interface IDBArrayKey extends Array<IDBValidKey> {
+}
+
+interface RsaKeyGenParams extends Algorithm {
+    modulusLength: number;
+    publicExponent: Uint8Array;
+}
+
+interface RsaHashedKeyGenParams extends RsaKeyGenParams {
+    hash: AlgorithmIdentifier;
+}
+
+interface RsaKeyAlgorithm extends KeyAlgorithm {
+    modulusLength: number;
+    publicExponent: Uint8Array;
+}
+
+interface RsaHashedKeyAlgorithm extends RsaKeyAlgorithm {
+    hash: AlgorithmIdentifier;
+}
+
+interface RsaHashedImportParams {
+    hash: AlgorithmIdentifier;
+}
+
+interface RsaPssParams {
+    saltLength: number;
+}
+
+interface RsaOaepParams extends Algorithm {
+    label?: BufferSource;
+}
+
+interface EcdsaParams extends Algorithm {
+    hash: AlgorithmIdentifier;
+}
+
+interface EcKeyGenParams extends Algorithm {
+    namedCurve: string;
+}
+
+interface EcKeyAlgorithm extends KeyAlgorithm {
+    typedCurve: string;
+}
+
+interface EcKeyImportParams {
+    namedCurve: string;
+}
+
+interface EcdhKeyDeriveParams extends Algorithm {
+    public: CryptoKey;
+}
+
+interface AesCtrParams extends Algorithm {
+    counter: BufferSource;
+    length: number;
+}
+
+interface AesKeyAlgorithm extends KeyAlgorithm {
+    length: number;
+}
+
+interface AesKeyGenParams extends Algorithm {
+    length: number;
+}
+
+interface AesDerivedKeyParams extends Algorithm {
+    length: number;
+}
+
+interface AesCbcParams extends Algorithm {
+    iv: BufferSource;
+}
+
+interface AesCmacParams extends Algorithm {
+    length: number;
+}
+
+interface AesGcmParams extends Algorithm {
+    iv: BufferSource;
+    additionalData?: BufferSource;
+    tagLength?: number;
+}
+
+interface AesCfbParams extends Algorithm {
+    iv: BufferSource;
+}
+
+interface HmacImportParams extends Algorithm {
+    hash?: AlgorithmIdentifier;
+    length?: number;
+}
+
+interface HmacKeyAlgorithm extends KeyAlgorithm {
+    hash: AlgorithmIdentifier;
+    length: number;
+}
+
+interface HmacKeyGenParams extends Algorithm {
+    hash: AlgorithmIdentifier;
+    length?: number;
+}
+
+interface DhKeyGenParams extends Algorithm {
+    prime: Uint8Array;
+    generator: Uint8Array;
+}
+
+interface DhKeyAlgorithm extends KeyAlgorithm {
+    prime: Uint8Array;
+    generator: Uint8Array;
+}
+
+interface DhKeyDeriveParams extends Algorithm {
+    public: CryptoKey;
+}
+
+interface DhImportKeyParams extends Algorithm {
+    prime: Uint8Array;
+    generator: Uint8Array;
+}
+
+interface ConcatParams extends Algorithm {
+    hash?: AlgorithmIdentifier;
+    algorithmId: Uint8Array;
+    partyUInfo: Uint8Array;
+    partyVInfo: Uint8Array;
+    publicInfo?: Uint8Array;
+    privateInfo?: Uint8Array;
+}
+
+interface HkdfCtrParams extends Algorithm {
+    hash: AlgorithmIdentifier;
+    label: BufferSource;
+    context: BufferSource;
+}
+
+interface Pbkdf2Params extends Algorithm {
+    salt: BufferSource;
+    iterations: number;
+    hash: AlgorithmIdentifier;
+}
+
+interface RsaOtherPrimesInfo {
+    r: string;
+    d: string;
+    t: string;
+}
+
+interface JsonWebKey {
+    kty: string;
+    use?: string;
+    key_ops?: string[];
+    alg?: string;
+    kid?: string;
+    x5u?: string;
+    x5c?: string;
+    x5t?: string;
+    ext?: boolean;
+    crv?: string;
+    x?: string;
+    y?: string;
+    d?: string;
+    n?: string;
+    e?: string;
+    p?: string;
+    q?: string;
+    dp?: string;
+    dq?: string;
+    qi?: string;
+    oth?: RsaOtherPrimesInfo[];
+    k?: string;
+}
+
+interface ParentNode {
+    readonly children: HTMLCollection;
+    readonly firstElementChild: Element | null;
+    readonly lastElementChild: Element | null;
+    readonly childElementCount: number;
+}
+
+interface DocumentOrShadowRoot {
+    readonly activeElement: Element | null;
+    readonly stylesheets: StyleSheetList;
+    getSelection(): Selection | null;
+    elementFromPoint(x: number, y: number): Element | null;
+    elementsFromPoint(x: number, y: number): Element[];
+}
+
+interface ShadowRoot extends DocumentOrShadowRoot, DocumentFragment {
+    readonly host: Element;
+    innerHTML: string;
+}
+
+interface ShadowRootInit {
+    mode: "open" | "closed";
+    delegatesFocus?: boolean;
+}
+
+interface HTMLSlotElement extends HTMLElement {
+    name: string;
+    assignedNodes(options?: AssignedNodesOptions): Node[];
+}
+
+interface AssignedNodesOptions {
+    flatten?: boolean;
+}
+
+interface ElementDefinitionOptions {
+    extends: string;
+}
+
+interface CustomElementRegistry {
+    define(name: string, constructor: Function, options?: ElementDefinitionOptions): void;
+    get(name: string): any;
+    whenDefined(name: string): PromiseLike<void>;
+}
+
+interface PromiseRejectionEvent extends Event {
+    readonly promise: PromiseLike<any>;
+    readonly reason: any;
+}
+
+interface PromiseRejectionEventInit extends EventInit {
+    promise: PromiseLike<any>;
+    reason?: any;
+}
+
+interface EventListenerOptions {
+    capture?: boolean;
+}
+
+interface AddEventListenerOptions extends EventListenerOptions {
+    passive?: boolean;
+    once?: boolean;
+}
+
+interface TouchEventInit extends EventModifierInit {
+    touches?: Touch[];
+    targetTouches?: Touch[];
+    changedTouches?: Touch[];
+}
+
+declare type EventListenerOrEventListenerObject = EventListener | EventListenerObject;
+
+interface DecodeErrorCallback {
+    (error: DOMException): void;
+}
+interface DecodeSuccessCallback {
+    (decodedData: AudioBuffer): void;
+}
+interface ErrorEventHandler {
+    (message: string, filename?: string, lineno?: number, colno?: number, error?: Error): void;
+}
+interface ForEachCallback {
+    (keyId: any, status: MediaKeyStatus): void;
+}
+interface FrameRequestCallback {
+    (time: number): void;
+}
+interface FunctionStringCallback {
+    (data: string): void;
+}
+interface IntersectionObserverCallback {
+    (entries: IntersectionObserverEntry[], observer: IntersectionObserver): void;
+}
+interface MediaQueryListListener {
+    (mql: MediaQueryList): void;
+}
+interface MSExecAtPriorityFunctionCallback {
+    (...args: any[]): any;
+}
+interface MSLaunchUriCallback {
+    (): void;
+}
+interface MSUnsafeFunctionCallback {
+    (): any;
+}
+interface MutationCallback {
+    (mutations: MutationRecord[], observer: MutationObserver): void;
+}
+interface NavigatorUserMediaErrorCallback {
+    (error: MediaStreamError): void;
+}
+interface NavigatorUserMediaSuccessCallback {
+    (stream: MediaStream): void;
+}
+interface NotificationPermissionCallback {
+    (permission: NotificationPermission): void;
+}
+interface PositionCallback {
+    (position: Position): void;
+}
+interface PositionErrorCallback {
+    (error: PositionError): void;
+}
+interface RTCPeerConnectionErrorCallback {
+    (error: DOMError): void;
+}
+interface RTCSessionDescriptionCallback {
+    (sdp: RTCSessionDescription): void;
+}
+interface RTCStatsCallback {
+    (report: RTCStatsReport): void;
+}
+interface VoidFunction {
+    (): void;
+}
+interface HTMLElementTagNameMap {
+    "a": HTMLAnchorElement;
+    "applet": HTMLAppletElement;
+    "area": HTMLAreaElement;
+    "audio": HTMLAudioElement;
+    "base": HTMLBaseElement;
+    "basefont": HTMLBaseFontElement;
+    "blockquote": HTMLQuoteElement;
+    "body": HTMLBodyElement;
+    "br": HTMLBRElement;
+    "button": HTMLButtonElement;
+    "canvas": HTMLCanvasElement;
+    "caption": HTMLTableCaptionElement;
+    "col": HTMLTableColElement;
+    "colgroup": HTMLTableColElement;
+    "data": HTMLDataElement;
+    "datalist": HTMLDataListElement;
+    "del": HTMLModElement;
+    "dir": HTMLDirectoryElement;
+    "div": HTMLDivElement;
+    "dl": HTMLDListElement;
+    "embed": HTMLEmbedElement;
+    "fieldset": HTMLFieldSetElement;
+    "font": HTMLFontElement;
+    "form": HTMLFormElement;
+    "frame": HTMLFrameElement;
+    "frameset": HTMLFrameSetElement;
+    "h1": HTMLHeadingElement;
+    "h2": HTMLHeadingElement;
+    "h3": HTMLHeadingElement;
+    "h4": HTMLHeadingElement;
+    "h5": HTMLHeadingElement;
+    "h6": HTMLHeadingElement;
+    "head": HTMLHeadElement;
+    "hr": HTMLHRElement;
+    "html": HTMLHtmlElement;
+    "iframe": HTMLIFrameElement;
+    "img": HTMLImageElement;
+    "input": HTMLInputElement;
+    "ins": HTMLModElement;
+    "isindex": HTMLUnknownElement;
+    "label": HTMLLabelElement;
+    "legend": HTMLLegendElement;
+    "li": HTMLLIElement;
+    "link": HTMLLinkElement;
+    "listing": HTMLPreElement;
+    "map": HTMLMapElement;
+    "marquee": HTMLMarqueeElement;
+    "menu": HTMLMenuElement;
+    "meta": HTMLMetaElement;
+    "meter": HTMLMeterElement;
+    "nextid": HTMLUnknownElement;
+    "object": HTMLObjectElement;
+    "ol": HTMLOListElement;
+    "optgroup": HTMLOptGroupElement;
+    "option": HTMLOptionElement;
+    "output": HTMLOutputElement;
+    "p": HTMLParagraphElement;
+    "param": HTMLParamElement;
+    "picture": HTMLPictureElement;
+    "pre": HTMLPreElement;
+    "progress": HTMLProgressElement;
+    "q": HTMLQuoteElement;
+    "script": HTMLScriptElement;
+    "select": HTMLSelectElement;
+    "source": HTMLSourceElement;
+    "span": HTMLSpanElement;
+    "style": HTMLStyleElement;
+    "table": HTMLTableElement;
+    "tbody": HTMLTableSectionElement;
+    "td": HTMLTableDataCellElement;
+    "template": HTMLTemplateElement;
+    "textarea": HTMLTextAreaElement;
+    "tfoot": HTMLTableSectionElement;
+    "th": HTMLTableHeaderCellElement;
+    "thead": HTMLTableSectionElement;
+    "time": HTMLTimeElement;
+    "title": HTMLTitleElement;
+    "tr": HTMLTableRowElement;
+    "track": HTMLTrackElement;
+    "ul": HTMLUListElement;
+    "video": HTMLVideoElement;
+    "x-ms-webview": MSHTMLWebViewElement;
+    "xmp": HTMLPreElement;
+}
+
+interface ElementTagNameMap extends HTMLElementTagNameMap {
+    "abbr": HTMLElement;
+    "acronym": HTMLElement;
+    "address": HTMLElement;
+    "article": HTMLElement;
+    "aside": HTMLElement;
+    "b": HTMLElement;
+    "bdo": HTMLElement;
+    "big": HTMLElement;
+    "center": HTMLElement;
+    "circle": SVGCircleElement;
+    "cite": HTMLElement;
+    "clippath": SVGClipPathElement;
+    "code": HTMLElement;
+    "dd": HTMLElement;
+    "defs": SVGDefsElement;
+    "desc": SVGDescElement;
+    "dfn": HTMLElement;
+    "dt": HTMLElement;
+    "ellipse": SVGEllipseElement;
+    "em": HTMLElement;
+    "feblend": SVGFEBlendElement;
+    "fecolormatrix": SVGFEColorMatrixElement;
+    "fecomponenttransfer": SVGFEComponentTransferElement;
+    "fecomposite": SVGFECompositeElement;
+    "feconvolvematrix": SVGFEConvolveMatrixElement;
+    "fediffuselighting": SVGFEDiffuseLightingElement;
+    "fedisplacementmap": SVGFEDisplacementMapElement;
+    "fedistantlight": SVGFEDistantLightElement;
+    "feflood": SVGFEFloodElement;
+    "fefunca": SVGFEFuncAElement;
+    "fefuncb": SVGFEFuncBElement;
+    "fefuncg": SVGFEFuncGElement;
+    "fefuncr": SVGFEFuncRElement;
+    "fegaussianblur": SVGFEGaussianBlurElement;
+    "feimage": SVGFEImageElement;
+    "femerge": SVGFEMergeElement;
+    "femergenode": SVGFEMergeNodeElement;
+    "femorphology": SVGFEMorphologyElement;
+    "feoffset": SVGFEOffsetElement;
+    "fepointlight": SVGFEPointLightElement;
+    "fespecularlighting": SVGFESpecularLightingElement;
+    "fespotlight": SVGFESpotLightElement;
+    "fetile": SVGFETileElement;
+    "feturbulence": SVGFETurbulenceElement;
+    "figcaption": HTMLElement;
+    "figure": HTMLElement;
+    "filter": SVGFilterElement;
+    "footer": HTMLElement;
+    "foreignobject": SVGForeignObjectElement;
+    "g": SVGGElement;
+    "header": HTMLElement;
+    "hgroup": HTMLElement;
+    "i": HTMLElement;
+    "image": SVGImageElement;
+    "kbd": HTMLElement;
+    "keygen": HTMLElement;
+    "line": SVGLineElement;
+    "lineargradient": SVGLinearGradientElement;
+    "mark": HTMLElement;
+    "marker": SVGMarkerElement;
+    "mask": SVGMaskElement;
+    "metadata": SVGMetadataElement;
+    "nav": HTMLElement;
+    "nobr": HTMLElement;
+    "noframes": HTMLElement;
+    "noscript": HTMLElement;
+    "path": SVGPathElement;
+    "pattern": SVGPatternElement;
+    "plaintext": HTMLElement;
+    "polygon": SVGPolygonElement;
+    "polyline": SVGPolylineElement;
+    "radialgradient": SVGRadialGradientElement;
+    "rect": SVGRectElement;
+    "rt": HTMLElement;
+    "ruby": HTMLElement;
+    "s": HTMLElement;
+    "samp": HTMLElement;
+    "section": HTMLElement;
+    "small": HTMLElement;
+    "stop": SVGStopElement;
+    "strike": HTMLElement;
+    "strong": HTMLElement;
+    "sub": HTMLElement;
+    "sup": HTMLElement;
+    "svg": SVGSVGElement;
+    "switch": SVGSwitchElement;
+    "symbol": SVGSymbolElement;
+    "text": SVGTextElement;
+    "textpath": SVGTextPathElement;
+    "tspan": SVGTSpanElement;
+    "tt": HTMLElement;
+    "u": HTMLElement;
+    "use": SVGUseElement;
+    "var": HTMLElement;
+    "view": SVGViewElement;
+    "wbr": HTMLElement;
+}
+
+type ElementListTagNameMap = {
+    [key in keyof ElementTagNameMap]: NodeListOf<ElementTagNameMap[key]>
+};
+
+declare var Audio: { new(src?: string): HTMLAudioElement; };
+declare var Image: { new(width?: number, height?: number): HTMLImageElement; };
+declare var Option: { new(text?: string, value?: string, defaultSelected?: boolean, selected?: boolean): HTMLOptionElement; };
+declare var applicationCache: ApplicationCache;
+declare var caches: CacheStorage;
+declare var clientInformation: Navigator;
+declare var closed: boolean;
+declare var crypto: Crypto;
+declare var defaultStatus: string;
+declare var devicePixelRatio: number;
+declare var document: Document;
+declare var doNotTrack: string;
+declare var event: Event | undefined;
+declare var external: External;
+declare var frameElement: Element;
+declare var frames: Window;
+declare var history: History;
+declare var innerHeight: number;
+declare var innerWidth: number;
+declare var isSecureContext: boolean;
+declare var length: number;
+declare var location: Location;
+declare var locationbar: BarProp;
+declare var menubar: BarProp;
+declare var msContentScript: ExtensionScriptApis;
+declare var msCredentials: MSCredentials;
+declare const name: never;
+declare var navigator: Navigator;
+declare var offscreenBuffering: string | boolean;
+declare var onabort: (this: Window, ev: UIEvent) => any;
+declare var onafterprint: (this: Window, ev: Event) => any;
+declare var onbeforeprint: (this: Window, ev: Event) => any;
+declare var onbeforeunload: (this: Window, ev: BeforeUnloadEvent) => any;
+declare var onblur: (this: Window, ev: FocusEvent) => any;
+declare var oncanplay: (this: Window, ev: Event) => any;
+declare var oncanplaythrough: (this: Window, ev: Event) => any;
+declare var onchange: (this: Window, ev: Event) => any;
+declare var onclick: (this: Window, ev: MouseEvent) => any;
+declare var oncompassneedscalibration: (this: Window, ev: Event) => any;
+declare var oncontextmenu: (this: Window, ev: PointerEvent) => any;
+declare var ondblclick: (this: Window, ev: MouseEvent) => any;
+declare var ondevicelight: (this: Window, ev: DeviceLightEvent) => any;
+declare var ondevicemotion: (this: Window, ev: DeviceMotionEvent) => any;
+declare var ondeviceorientation: (this: Window, ev: DeviceOrientationEvent) => any;
+declare var ondrag: (this: Window, ev: DragEvent) => any;
+declare var ondragend: (this: Window, ev: DragEvent) => any;
+declare var ondragenter: (this: Window, ev: DragEvent) => any;
+declare var ondragleave: (this: Window, ev: DragEvent) => any;
+declare var ondragover: (this: Window, ev: DragEvent) => any;
+declare var ondragstart: (this: Window, ev: DragEvent) => any;
+declare var ondrop: (this: Window, ev: DragEvent) => any;
+declare var ondurationchange: (this: Window, ev: Event) => any;
+declare var onemptied: (this: Window, ev: Event) => any;
+declare var onended: (this: Window, ev: MediaStreamErrorEvent) => any;
+declare var onerror: ErrorEventHandler;
+declare var onfocus: (this: Window, ev: FocusEvent) => any;
+declare var onhashchange: (this: Window, ev: HashChangeEvent) => any;
+declare var oninput: (this: Window, ev: Event) => any;
+declare var oninvalid: (this: Window, ev: Event) => any;
+declare var onkeydown: (this: Window, ev: KeyboardEvent) => any;
+declare var onkeypress: (this: Window, ev: KeyboardEvent) => any;
+declare var onkeyup: (this: Window, ev: KeyboardEvent) => any;
+declare var onload: (this: Window, ev: Event) => any;
+declare var onloadeddata: (this: Window, ev: Event) => any;
+declare var onloadedmetadata: (this: Window, ev: Event) => any;
+declare var onloadstart: (this: Window, ev: Event) => any;
+declare var onmessage: (this: Window, ev: MessageEvent) => any;
+declare var onmousedown: (this: Window, ev: MouseEvent) => any;
+declare var onmouseenter: (this: Window, ev: MouseEvent) => any;
+declare var onmouseleave: (this: Window, ev: MouseEvent) => any;
+declare var onmousemove: (this: Window, ev: MouseEvent) => any;
+declare var onmouseout: (this: Window, ev: MouseEvent) => any;
+declare var onmouseover: (this: Window, ev: MouseEvent) => any;
+declare var onmouseup: (this: Window, ev: MouseEvent) => any;
+declare var onmousewheel: (this: Window, ev: WheelEvent) => any;
+declare var onmsgesturechange: (this: Window, ev: MSGestureEvent) => any;
+declare var onmsgesturedoubletap: (this: Window, ev: MSGestureEvent) => any;
+declare var onmsgestureend: (this: Window, ev: MSGestureEvent) => any;
+declare var onmsgesturehold: (this: Window, ev: MSGestureEvent) => any;
+declare var onmsgesturestart: (this: Window, ev: MSGestureEvent) => any;
+declare var onmsgesturetap: (this: Window, ev: MSGestureEvent) => any;
+declare var onmsinertiastart: (this: Window, ev: MSGestureEvent) => any;
+declare var onmspointercancel: (this: Window, ev: MSPointerEvent) => any;
+declare var onmspointerdown: (this: Window, ev: MSPointerEvent) => any;
+declare var onmspointerenter: (this: Window, ev: MSPointerEvent) => any;
+declare var onmspointerleave: (this: Window, ev: MSPointerEvent) => any;
+declare var onmspointermove: (this: Window, ev: MSPointerEvent) => any;
+declare var onmspointerout: (this: Window, ev: MSPointerEvent) => any;
+declare var onmspointerover: (this: Window, ev: MSPointerEvent) => any;
+declare var onmspointerup: (this: Window, ev: MSPointerEvent) => any;
+declare var onoffline: (this: Window, ev: Event) => any;
+declare var ononline: (this: Window, ev: Event) => any;
+declare var onorientationchange: (this: Window, ev: Event) => any;
+declare var onpagehide: (this: Window, ev: PageTransitionEvent) => any;
+declare var onpageshow: (this: Window, ev: PageTransitionEvent) => any;
+declare var onpause: (this: Window, ev: Event) => any;
+declare var onplay: (this: Window, ev: Event) => any;
+declare var onplaying: (this: Window, ev: Event) => any;
+declare var onpopstate: (this: Window, ev: PopStateEvent) => any;
+declare var onprogress: (this: Window, ev: ProgressEvent) => any;
+declare var onratechange: (this: Window, ev: Event) => any;
+declare var onreadystatechange: (this: Window, ev: ProgressEvent) => any;
+declare var onreset: (this: Window, ev: Event) => any;
+declare var onresize: (this: Window, ev: UIEvent) => any;
+declare var onscroll: (this: Window, ev: UIEvent) => any;
+declare var onseeked: (this: Window, ev: Event) => any;
+declare var onseeking: (this: Window, ev: Event) => any;
+declare var onselect: (this: Window, ev: UIEvent) => any;
+declare var onstalled: (this: Window, ev: Event) => any;
+declare var onstorage: (this: Window, ev: StorageEvent) => any;
+declare var onsubmit: (this: Window, ev: Event) => any;
+declare var onsuspend: (this: Window, ev: Event) => any;
+declare var ontimeupdate: (this: Window, ev: Event) => any;
+declare var ontouchcancel: (ev: TouchEvent) => any;
+declare var ontouchend: (ev: TouchEvent) => any;
+declare var ontouchmove: (ev: TouchEvent) => any;
+declare var ontouchstart: (ev: TouchEvent) => any;
+declare var onunload: (this: Window, ev: Event) => any;
+declare var onvolumechange: (this: Window, ev: Event) => any;
+declare var onwaiting: (this: Window, ev: Event) => any;
+declare var opener: any;
+declare var orientation: string | number;
+declare var outerHeight: number;
+declare var outerWidth: number;
+declare var pageXOffset: number;
+declare var pageYOffset: number;
+declare var parent: Window;
+declare var performance: Performance;
+declare var personalbar: BarProp;
+declare var screen: Screen;
+declare var screenLeft: number;
+declare var screenTop: number;
+declare var screenX: number;
+declare var screenY: number;
+declare var scrollbars: BarProp;
+declare var scrollX: number;
+declare var scrollY: number;
+declare var self: Window;
+declare var speechSynthesis: SpeechSynthesis;
+declare var status: string;
+declare var statusbar: BarProp;
+declare var styleMedia: StyleMedia;
+declare var toolbar: BarProp;
+declare var top: Window;
+declare var window: Window;
+declare var customElements: CustomElementRegistry;
+declare function alert(message?: any): void;
+declare function blur(): void;
+declare function cancelAnimationFrame(handle: number): void;
+declare function captureEvents(): void;
+declare function close(): void;
+declare function confirm(message?: string): boolean;
+declare function departFocus(navigationReason: NavigationReason, origin: FocusNavigationOrigin): void;
+declare function focus(): void;
+declare function getComputedStyle(elt: Element, pseudoElt?: string): CSSStyleDeclaration;
+declare function getMatchedCSSRules(elt: Element, pseudoElt?: string): CSSRuleList;
+declare function getSelection(): Selection;
+declare function matchMedia(mediaQuery: string): MediaQueryList;
+declare function moveBy(x?: number, y?: number): void;
+declare function moveTo(x?: number, y?: number): void;
+declare function msWriteProfilerMark(profilerMarkName: string): void;
+declare function open(url?: string, target?: string, features?: string, replace?: boolean): Window;
+declare function postMessage(message: any, targetOrigin: string, transfer?: any[]): void;
+declare function print(): void;
+declare function prompt(message?: string, _default?: string): string | null;
+declare function releaseEvents(): void;
+declare function requestAnimationFrame(callback: FrameRequestCallback): number;
+declare function resizeBy(x?: number, y?: number): void;
+declare function resizeTo(x?: number, y?: number): void;
+declare function scroll(x?: number, y?: number): void;
+declare function scrollBy(x?: number, y?: number): void;
+declare function scrollTo(x?: number, y?: number): void;
+declare function stop(): void;
+declare function webkitCancelAnimationFrame(handle: number): void;
+declare function webkitConvertPointFromNodeToPage(node: Node, pt: WebKitPoint): WebKitPoint;
+declare function webkitConvertPointFromPageToNode(node: Node, pt: WebKitPoint): WebKitPoint;
+declare function webkitRequestAnimationFrame(callback: FrameRequestCallback): number;
+declare function createImageBitmap(image: HTMLImageElement | SVGImageElement | HTMLVideoElement | HTMLCanvasElement | ImageBitmap | ImageData | Blob, options?: ImageBitmapOptions): Promise<ImageBitmap>;
+declare function createImageBitmap(image: HTMLImageElement | SVGImageElement | HTMLVideoElement | HTMLCanvasElement | ImageBitmap | ImageData | Blob, sx: number, sy: number, sw: number, sh: number, options?: ImageBitmapOptions): Promise<ImageBitmap>;
+declare function scroll(options?: ScrollToOptions): void;
+declare function scrollTo(options?: ScrollToOptions): void;
+declare function scrollBy(options?: ScrollToOptions): void;
+declare function toString(): string;
+declare function dispatchEvent(evt: Event): boolean;
+declare function removeEventListener(type: string, listener?: EventListenerOrEventListenerObject, options?: boolean | EventListenerOptions): void;
+declare function clearInterval(handle: number): void;
+declare function clearTimeout(handle: number): void;
+declare function setInterval(handler: (...args: any[]) => void, timeout: number): number;
+declare function setInterval(handler: any, timeout?: any, ...args: any[]): number;
+declare function setTimeout(handler: (...args: any[]) => void, timeout: number): number;
+declare function setTimeout(handler: any, timeout?: any, ...args: any[]): number;
+declare function clearImmediate(handle: number): void;
+declare function setImmediate(handler: (...args: any[]) => void): number;
+declare function setImmediate(handler: any, ...args: any[]): number;
+declare var sessionStorage: Storage;
+declare var localStorage: Storage;
+declare var console: Console;
+declare var onpointercancel: (this: Window, ev: PointerEvent) => any;
+declare var onpointerdown: (this: Window, ev: PointerEvent) => any;
+declare var onpointerenter: (this: Window, ev: PointerEvent) => any;
+declare var onpointerleave: (this: Window, ev: PointerEvent) => any;
+declare var onpointermove: (this: Window, ev: PointerEvent) => any;
+declare var onpointerout: (this: Window, ev: PointerEvent) => any;
+declare var onpointerover: (this: Window, ev: PointerEvent) => any;
+declare var onpointerup: (this: Window, ev: PointerEvent) => any;
+declare var onwheel: (this: Window, ev: WheelEvent) => any;
+declare var indexedDB: IDBFactory;
+declare function atob(encodedString: string): string;
+declare function btoa(rawString: string): string;
+declare function fetch(input: RequestInfo, init?: RequestInit): Promise<Response>;
+declare function addEventListener<K extends keyof WindowEventMap>(type: K, listener: (this: Window, ev: WindowEventMap[K]) => any, useCapture?: boolean): void;
+declare function addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+type AAGUID = string;
+type AlgorithmIdentifier = string | Algorithm;
+type BodyInit = any;
+type ByteString = string;
+type ConstrainBoolean = boolean | ConstrainBooleanParameters;
+type ConstrainDOMString = string | string[] | ConstrainDOMStringParameters;
+type ConstrainDouble = number | ConstrainDoubleRange;
+type ConstrainLong = number | ConstrainLongRange;
+type CryptoOperationData = ArrayBufferView;
+type GLbitfield = number;
+type GLboolean = boolean;
+type GLbyte = number;
+type GLclampf = number;
+type GLenum = number;
+type GLfloat = number;
+type GLint = number;
+type GLintptr = number;
+type GLshort = number;
+type GLsizei = number;
+type GLsizeiptr = number;
+type GLubyte = number;
+type GLuint = number;
+type GLushort = number;
+type HeadersInit = any;
+type IDBKeyPath = string;
+type KeyFormat = string;
+type KeyType = string;
+type KeyUsage = string;
+type MSInboundPayload = MSVideoRecvPayload | MSAudioRecvPayload;
+type MSLocalClientEvent = MSLocalClientEventBase | MSAudioLocalClientEvent;
+type MSOutboundPayload = MSVideoSendPayload | MSAudioSendPayload;
+type RTCIceGatherCandidate = RTCIceCandidateDictionary | RTCIceCandidateComplete;
+type RTCTransport = RTCDtlsTransport | RTCSrtpSdesTransport;
+type RequestInfo = Request | string;
+type USVString = string;
+type payloadtype = number;
+type ScrollBehavior = "auto" | "instant" | "smooth";
+type ScrollLogicalPosition = "start" | "center" | "end" | "nearest";
+type IDBValidKey = number | string | Date | IDBArrayKey;
+type BufferSource = ArrayBuffer | ArrayBufferView;
+type MouseWheelEvent = WheelEvent;
+type ScrollRestoration = "auto" | "manual";
+type FormDataEntryValue = string | File;
+type InsertPosition = "beforebegin" | "afterbegin" | "beforeend" | "afterend";
+type AppendMode = "segments" | "sequence";
+type AudioContextState = "suspended" | "running" | "closed";
+type BiquadFilterType = "lowpass" | "highpass" | "bandpass" | "lowshelf" | "highshelf" | "peaking" | "notch" | "allpass";
+type CanvasFillRule = "nonzero" | "evenodd";
+type ChannelCountMode = "max" | "clamped-max" | "explicit";
+type ChannelInterpretation = "speakers" | "discrete";
+type DistanceModelType = "linear" | "inverse" | "exponential";
+type ExpandGranularity = "character" | "word" | "sentence" | "textedit";
+type GamepadInputEmulationType = "mouse" | "keyboard" | "gamepad";
+type IDBCursorDirection = "next" | "nextunique" | "prev" | "prevunique";
+type IDBRequestReadyState = "pending" | "done";
+type IDBTransactionMode = "readonly" | "readwrite" | "versionchange";
+type ListeningState = "inactive" | "active" | "disambiguation";
+type MediaDeviceKind = "audioinput" | "audiooutput" | "videoinput";
+type MediaKeyMessageType = "license-request" | "license-renewal" | "license-release" | "individualization-request";
+type MediaKeySessionType = "temporary" | "persistent-license" | "persistent-release-message";
+type MediaKeysRequirement = "required" | "optional" | "not-allowed";
+type MediaKeyStatus = "usable" | "expired" | "output-downscaled" | "output-not-allowed" | "status-pending" | "internal-error";
+type MediaStreamTrackState = "live" | "ended";
+type MSCredentialType = "FIDO_2_0";
+type MSIceAddrType = "os" | "stun" | "turn" | "peer-derived";
+type MSIceType = "failed" | "direct" | "relay";
+type MSStatsType = "description" | "localclientevent" | "inbound-network" | "outbound-network" | "inbound-payload" | "outbound-payload" | "transportdiagnostics";
+type MSTransportType = "Embedded" | "USB" | "NFC" | "BT";
+type MSWebViewPermissionState = "unknown" | "defer" | "allow" | "deny";
+type MSWebViewPermissionType = "geolocation" | "unlimitedIndexedDBQuota" | "media" | "pointerlock" | "webnotifications";
+type NavigationReason = "up" | "down" | "left" | "right";
+type NavigationType = "navigate" | "reload" | "back_forward" | "prerender";
+type NotificationDirection = "auto" | "ltr" | "rtl";
+type NotificationPermission = "default" | "denied" | "granted";
+type OscillatorType = "sine" | "square" | "sawtooth" | "triangle" | "custom";
+type OverSampleType = "none" | "2x" | "4x";
+type PanningModelType = "equalpower";
+type PaymentComplete = "success" | "fail" | "";
+type PaymentShippingType = "shipping" | "delivery" | "pickup";
+type PushEncryptionKeyName = "p256dh" | "auth";
+type PushPermissionState = "granted" | "denied" | "prompt";
+type ReferrerPolicy = "" | "no-referrer" | "no-referrer-when-downgrade" | "origin-only" | "origin-when-cross-origin" | "unsafe-url";
+type RequestCache = "default" | "no-store" | "reload" | "no-cache" | "force-cache";
+type RequestCredentials = "omit" | "same-origin" | "include";
+type RequestDestination = "" | "document" | "sharedworker" | "subresource" | "unknown" | "worker";
+type RequestMode = "navigate" | "same-origin" | "no-cors" | "cors";
+type RequestRedirect = "follow" | "error" | "manual";
+type RequestType = "" | "audio" | "font" | "image" | "script" | "style" | "track" | "video";
+type ResponseType = "basic" | "cors" | "default" | "error" | "opaque" | "opaqueredirect";
+type RTCBundlePolicy = "balanced" | "max-compat" | "max-bundle";
+type RTCDegradationPreference = "maintain-framerate" | "maintain-resolution" | "balanced";
+type RTCDtlsRole = "auto" | "client" | "server";
+type RTCDtlsTransportState = "new" | "connecting" | "connected" | "closed";
+type RTCIceCandidateType = "host" | "srflx" | "prflx" | "relay";
+type RTCIceComponent = "RTP" | "RTCP";
+type RTCIceConnectionState = "new" | "checking" | "connected" | "completed" | "failed" | "disconnected" | "closed";
+type RTCIceGathererState = "new" | "gathering" | "complete";
+type RTCIceGatheringState = "new" | "gathering" | "complete";
+type RTCIceGatherPolicy = "all" | "nohost" | "relay";
+type RTCIceProtocol = "udp" | "tcp";
+type RTCIceRole = "controlling" | "controlled";
+type RTCIceTcpCandidateType = "active" | "passive" | "so";
+type RTCIceTransportPolicy = "none" | "relay" | "all";
+type RTCIceTransportState = "new" | "checking" | "connected" | "completed" | "disconnected" | "closed";
+type RTCSdpType = "offer" | "pranswer" | "answer";
+type RTCSignalingState = "stable" | "have-local-offer" | "have-remote-offer" | "have-local-pranswer" | "have-remote-pranswer" | "closed";
+type RTCStatsIceCandidatePairState = "frozen" | "waiting" | "inprogress" | "failed" | "succeeded" | "cancelled";
+type RTCStatsIceCandidateType = "host" | "serverreflexive" | "peerreflexive" | "relayed";
+type RTCStatsType = "inboundrtp" | "outboundrtp" | "session" | "datachannel" | "track" | "transport" | "candidatepair" | "localcandidate" | "remotecandidate";
+type ScopedCredentialType = "ScopedCred";
+type ServiceWorkerState = "installing" | "installed" | "activating" | "activated" | "redundant";
+type Transport = "usb" | "nfc" | "ble";
+type VideoFacingModeEnum = "user" | "environment" | "left" | "right";
+type VisibilityState = "hidden" | "visible" | "prerender" | "unloaded";
+type XMLHttpRequestResponseType = "" | "arraybuffer" | "blob" | "document" | "json" | "text";
+
+
+/////////////////////////////
+/// WorkerGlobalScope APIs
+/////////////////////////////
+// These are only available in a Web Worker
+declare function importScripts(...urls: string[]): void;
+
+
+
+
+/////////////////////////////
+/// Windows Script Host APIS
+/////////////////////////////
+
+
+interface ActiveXObject {
+    new (s: string): any;
+}
+declare var ActiveXObject: ActiveXObject;
+
+interface ITextWriter {
+    Write(s: string): void;
+    WriteLine(s: string): void;
+    Close(): void;
+}
+
+interface TextStreamBase {
+    /**
+     * The column number of the current character position in an input stream.
+     */
+    Column: number;
+
+    /**
+     * The current line number in an input stream.
+     */
+    Line: number;
+
+    /**
+     * Closes a text stream.
+     * It is not necessary to close standard streams; they close automatically when the process ends. If
+     * you close a standard stream, be aware that any other pointers to that standard stream become invalid.
+     */
+    Close(): void;
+}
+
+interface TextStreamWriter extends TextStreamBase {
+    /**
+     * Sends a string to an output stream.
+     */
+    Write(s: string): void;
+
+    /**
+     * Sends a specified number of blank lines (newline characters) to an output stream.
+     */
+    WriteBlankLines(intLines: number): void;
+
+    /**
+     * Sends a string followed by a newline character to an output stream.
+     */
+    WriteLine(s: string): void;
+}
+
+interface TextStreamReader extends TextStreamBase {
+    /**
+     * Returns a specified number of characters from an input stream, starting at the current pointer position.
+     * Does not return until the ENTER key is pressed.
+     * Can only be used on a stream in reading mode; causes an error in writing or appending mode.
+     */
+    Read(characters: number): string;
+
+    /**
+     * Returns all characters from an input stream.
+     * Can only be used on a stream in reading mode; causes an error in writing or appending mode.
+     */
+    ReadAll(): string;
+
+    /**
+     * Returns an entire line from an input stream.
+     * Although this method extracts the newline character, it does not add it to the returned string.
+     * Can only be used on a stream in reading mode; causes an error in writing or appending mode.
+     */
+    ReadLine(): string;
+
+    /**
+     * Skips a specified number of characters when reading from an input text stream.
+     * Can only be used on a stream in reading mode; causes an error in writing or appending mode.
+     * @param characters Positive number of characters to skip forward. (Backward skipping is not supported.)
+     */
+    Skip(characters: number): void;
+
+    /**
+     * Skips the next line when reading from an input text stream.
+     * Can only be used on a stream in reading mode, not writing or appending mode.
+     */
+    SkipLine(): void;
+
+    /**
+     * Indicates whether the stream pointer position is at the end of a line.
+     */
+    AtEndOfLine: boolean;
+
+    /**
+     * Indicates whether the stream pointer position is at the end of a stream.
+     */
+    AtEndOfStream: boolean;
+}
+
+declare var WScript: {
+    /**
+     * Outputs text to either a message box (under WScript.exe) or the command console window followed by
+     * a newline (under CScript.exe).
+     */
+    Echo(s: any): void;
+
+    /**
+     * Exposes the write-only error output stream for the current script.
+     * Can be accessed only while using CScript.exe.
+     */
+    StdErr: TextStreamWriter;
+
+    /**
+     * Exposes the write-only output stream for the current script.
+     * Can be accessed only while using CScript.exe.
+     */
+    StdOut: TextStreamWriter;
+    Arguments: { length: number; Item(n: number): string; };
+
+    /**
+     *  The full path of the currently running script.
+     */
+    ScriptFullName: string;
+
+    /**
+     * Forces the script to stop immediately, with an optional exit code.
+     */
+    Quit(exitCode?: number): number;
+
+    /**
+     * The Windows Script Host build version number.
+     */
+    BuildVersion: number;
+
+    /**
+     * Fully qualified path of the host executable.
+     */
+    FullName: string;
+
+    /**
+     * Gets/sets the script mode - interactive(true) or batch(false).
+     */
+    Interactive: boolean;
+
+    /**
+     * The name of the host executable (WScript.exe or CScript.exe).
+     */
+    Name: string;
+
+    /**
+     * Path of the directory containing the host executable.
+     */
+    Path: string;
+
+    /**
+     * The filename of the currently running script.
+     */
+    ScriptName: string;
+
+    /**
+     * Exposes the read-only input stream for the current script.
+     * Can be accessed only while using CScript.exe.
+     */
+    StdIn: TextStreamReader;
+
+    /**
+     * Windows Script Host version
+     */
+    Version: string;
+
+    /**
+     * Connects a COM object's event sources to functions named with a given prefix, in the form prefix_event.
+     */
+    ConnectObject(objEventSource: any, strPrefix: string): void;
+
+    /**
+     * Creates a COM object.
+     * @param strProgiID
+     * @param strPrefix Function names in the form prefix_event will be bound to this object's COM events.
+     */
+    CreateObject(strProgID: string, strPrefix?: string): any;
+
+    /**
+     * Disconnects a COM object from its event sources.
+     */
+    DisconnectObject(obj: any): void;
+
+    /**
+     * Retrieves an existing object with the specified ProgID from memory, or creates a new one from a file.
+     * @param strPathname Fully qualified path to the file containing the object persisted to disk.
+     *                       For objects in memory, pass a zero-length string.
+     * @param strProgID
+     * @param strPrefix Function names in the form prefix_event will be bound to this object's COM events.
+     */
+    GetObject(strPathname: string, strProgID?: string, strPrefix?: string): any;
+
+    /**
+     * Suspends script execution for a specified length of time, then continues execution.
+     * @param intTime Interval (in milliseconds) to suspend script execution.
+     */
+    Sleep(intTime: number): void;
+};
+
+/**
+ * Allows enumerating over a COM collection, which may not have indexed item access.
+ */
+interface Enumerator<T> {
+    /**
+     * Returns true if the current item is the last one in the collection, or the collection is empty,
+     * or the current item is undefined.
+     */
+    atEnd(): boolean;
+
+    /**
+     * Returns the current item in the collection
+     */
+    item(): T;
+
+    /**
+     * Resets the current item in the collection to the first item. If there are no items in the collection,
+     * the current item is set to undefined.
+     */
+    moveFirst(): void;
+
+    /**
+     * Moves the current item to the next item in the collection. If the enumerator is at the end of
+     * the collection or the collection is empty, the current item is set to undefined.
+     */
+    moveNext(): void;
+}
+
+interface EnumeratorConstructor {
+    new <T>(collection: any): Enumerator<T>;
+    new (collection: any): Enumerator<any>;
+}
+
+declare var Enumerator: EnumeratorConstructor;
+
+/**
+ * Enables reading from a COM safe array, which might have an alternate lower bound, or multiple dimensions.
+ */
+interface VBArray<T> {
+    /**
+     * Returns the number of dimensions (1-based).
+     */
+    dimensions(): number;
+
+    /**
+     * Takes an index for each dimension in the array, and returns the item at the corresponding location.
+     */
+    getItem(dimension1Index: number, ...dimensionNIndexes: number[]): T;
+
+    /**
+     * Returns the smallest available index for a given dimension.
+     * @param dimension 1-based dimension (defaults to 1)
+     */
+    lbound(dimension?: number): number;
+
+    /**
+     * Returns the largest available index for a given dimension.
+     * @param dimension 1-based dimension (defaults to 1)
+     */
+    ubound(dimension?: number): number;
+
+    /**
+     * Returns a Javascript array with all the elements in the VBArray. If there are multiple dimensions,
+     * each successive dimension is appended to the end of the array.
+     * Example: [[1,2,3],[4,5,6]] becomes [1,2,3,4,5,6]
+     */
+    toArray(): T[];
+}
+
+interface VBArrayConstructor {
+    new <T>(safeArray: any): VBArray<T>;
+    new (safeArray: any): VBArray<any>;
+}
+
+declare var VBArray: VBArrayConstructor;
+
+/**
+ * Automation date (VT_DATE)
+ */
+interface VarDate { }
+
+interface DateConstructor {
+    new (vd: VarDate): Date;
+}
+
+interface Date {
+    getVarDate: () => VarDate;
+}
+
+
+/// <reference path="lib.dom.d.ts" />
+
+interface DOMTokenList {
+    [Symbol.iterator](): IterableIterator<string>;
+}
+
+interface FormData {
+    /**
+     * Returns an array of key, value pairs for every entry in the list
+     */
+    entries(): IterableIterator<[string, string | File]>;
+    /**
+     * Returns a list of keys in the list
+     */
+    keys(): IterableIterator<string>;
+    /**
+     * Returns a list of values in the list
+     */
+    values(): IterableIterator<string | File>;
+
+    [Symbol.iterator](): IterableIterator<string | File>;
+}
+
+interface Headers {
+    [Symbol.iterator](): IterableIterator<[string, string]>;
+    /**
+     * Returns an iterator allowing to go through all key/value pairs contained in this object.
+     */
+    entries(): IterableIterator<[string, string]>;
+    /**
+     * Returns an iterator allowing to go through all keys f the key/value pairs contained in this object.
+     */
+    keys(): IterableIterator<string>;
+    /**
+     * Returns an iterator allowing to go through all values of the key/value pairs contained in this object.
+     */
+    values(): IterableIterator<string>;
+}
+
+interface NodeList {
+    /**
+     * Returns an array of key, value pairs for every entry in the list
+     */
+    entries(): IterableIterator<[number, Node]>;
+    /**
+     * Performs the specified action for each node in an list.
+     * @param callbackfn  A function that accepts up to three arguments. forEach calls the callbackfn function one time for each element in the list.
+     * @param thisArg  An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
+     */
+    forEach(callbackfn: (value: Node, index: number, listObj: NodeList) => void, thisArg?: any): void;
+    /**
+     * Returns an list of keys in the list
+     */
+    keys(): IterableIterator<number>;
+
+    /**
+     * Returns an list of values in the list
+     */
+    values(): IterableIterator<Node>;
+
+
+    [Symbol.iterator](): IterableIterator<Node>;
+}
+
+interface NodeListOf<TNode extends Node> {
+
+    /**
+     * Returns an array of key, value pairs for every entry in the list
+     */
+    entries(): IterableIterator<[number, TNode]>;
+
+    /**
+     * Performs the specified action for each node in an list.
+     * @param callbackfn  A function that accepts up to three arguments. forEach calls the callbackfn function one time for each element in the list.
+     * @param thisArg  An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
+     */
+    forEach(callbackfn: (value: TNode, index: number, listObj: NodeListOf<TNode>) => void, thisArg?: any): void;
+    /**
+     * Returns an list of keys in the list
+     */
+    keys(): IterableIterator<number>;
+    /**
+     * Returns an list of values in the list
+     */
+    values(): IterableIterator<TNode>;
+
+    [Symbol.iterator](): IterableIterator<TNode>;
+}
+
+interface URLSearchParams {
+    /**
+     * Returns an array of key, value pairs for every entry in the search params
+     */
+    entries(): IterableIterator<[string, string]>;
+    /**
+     * Returns a list of keys in the search params
+     */
+    keys(): IterableIterator<string>;
+    /**
+     * Returns a list of values in the search params
+     */
+    values(): IterableIterator<string>;
+    /**
+     * iterate over key/value pairs
+     */
+    [Symbol.iterator](): IterableIterator<[string, string]>;
+}
diff --git a/bin/lib.es2017.intl.d.ts b/bin/lib.es2017.intl.d.ts
new file mode 100644
index 0000000..dd1bf6d
--- /dev/null
+++ b/bin/lib.es2017.intl.d.ts
@@ -0,0 +1,30 @@
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved. 
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0  
+ 
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
+MERCHANTABLITY OR NON-INFRINGEMENT. 
+ 
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+
+
+
+/// <reference no-default-lib="true"/>
+
+
+type DateTimeFormatPartTypes = "day" | "dayPeriod" | "era" | "hour" | "literal" | "minute" | "month" | "second" | "timeZoneName" | "weekday" | "year";
+
+interface DateTimeFormatPart {
+    type: DateTimeFormatPartTypes;
+    value: string;
+}
+
+interface DateTimeFormat {
+    formatToParts(date?: Date | number): DateTimeFormatPart[];
+}
diff --git a/bin/lib.es2017.object.d.ts b/bin/lib.es2017.object.d.ts
index ac3a16a..00c11be 100644
--- a/bin/lib.es2017.object.d.ts
+++ b/bin/lib.es2017.object.d.ts
@@ -1,30 +1,45 @@
-/*! *****************************************************************************
-Copyright (c) Microsoft Corporation. All rights reserved. 
-Licensed under the Apache License, Version 2.0 (the "License"); you may not use
-this file except in compliance with the License. You may obtain a copy of the
-License at http://www.apache.org/licenses/LICENSE-2.0  
- 
-THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
-WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
-MERCHANTABLITY OR NON-INFRINGEMENT. 
- 
-See the Apache Version 2.0 License for specific language governing permissions
-and limitations under the License.
-***************************************************************************** */
-
-/// <reference no-default-lib="true"/>
-interface ObjectConstructor {
-    /**
-      * Returns an array of values of the enumerable properties of an object
-      * @param o Object that contains the properties and methods. This can be an object that you created or an existing Document Object Model (DOM) object.
-      */
-    values<T>(o: { [s: string]: T }): T[];
-    values(o: any): any[];
-    /**
-      * Returns an array of key/values of the enumerable properties of an object
-      * @param o Object that contains the properties and methods. This can be an object that you created or an existing Document Object Model (DOM) object.
-      */
-    entries<T>(o: { [s: string]: T }): [string, T][];
-    entries(o: any): [string, any][];
-}
\ No newline at end of file
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved. 
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0  
+ 
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
+MERCHANTABLITY OR NON-INFRINGEMENT. 
+ 
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+
+
+
+/// <reference no-default-lib="true"/>
+
+
+interface ObjectConstructor {
+    /**
+     * Returns an array of values of the enumerable properties of an object
+     * @param o Object that contains the properties and methods. This can be an object that you created or an existing Document Object Model (DOM) object.
+     */
+    values<T>(o: { [s: string]: T }): T[];
+
+    /**
+     * Returns an array of values of the enumerable properties of an object
+     * @param o Object that contains the properties and methods. This can be an object that you created or an existing Document Object Model (DOM) object.
+     */
+    values(o: any): any[];
+
+    /**
+     * Returns an array of key/values of the enumerable properties of an object
+     * @param o Object that contains the properties and methods. This can be an object that you created or an existing Document Object Model (DOM) object.
+     */
+    entries<T>(o: { [s: string]: T }): [string, T][];
+
+    /**
+     * Returns an array of key/values of the enumerable properties of an object
+     * @param o Object that contains the properties and methods. This can be an object that you created or an existing Document Object Model (DOM) object.
+     */
+    entries(o: any): [string, any][];
+}
diff --git a/bin/lib.es2017.sharedmemory.d.ts b/bin/lib.es2017.sharedmemory.d.ts
index 639ca75..50a3868 100644
--- a/bin/lib.es2017.sharedmemory.d.ts
+++ b/bin/lib.es2017.sharedmemory.d.ts
@@ -1,43 +1,138 @@
-/*! *****************************************************************************
-Copyright (c) Microsoft Corporation. All rights reserved. 
-Licensed under the Apache License, Version 2.0 (the "License"); you may not use
-this file except in compliance with the License. You may obtain a copy of the
-License at http://www.apache.org/licenses/LICENSE-2.0  
- 
-THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
-WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
-MERCHANTABLITY OR NON-INFRINGEMENT. 
- 
-See the Apache Version 2.0 License for specific language governing permissions
-and limitations under the License.
-***************************************************************************** */
-
-/// <reference no-default-lib="true"/>
-/// <reference path="lib.es2015.symbol.d.ts" />
-/// <reference path="lib.es2015.symbol.wellknown.d.ts" />
-
-interface SharedArrayBuffer {
-    /**
-      * Read-only. The length of the ArrayBuffer (in bytes).
-      */
-    readonly byteLength: number;
-
-    /*
-     * The SharedArrayBuffer constructor's length property whose value is 1.
-     */
-    length: number;
-    /**
-      * Returns a section of an SharedArrayBuffer.
-      */ 
-    slice(begin:number, end?:number): SharedArrayBuffer;
-    readonly [Symbol.species]: SharedArrayBuffer;
-    readonly [Symbol.toStringTag]: "SharedArrayBuffer";
-}
-
-interface SharedArrayBufferConstructor {
-    readonly prototype: SharedArrayBuffer;
-    new (byteLength: number): SharedArrayBuffer;
-}
-
-declare var SharedArrayBuffer: SharedArrayBufferConstructor;
\ No newline at end of file
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved. 
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0  
+ 
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
+MERCHANTABLITY OR NON-INFRINGEMENT. 
+ 
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+
+
+
+/// <reference no-default-lib="true"/>
+
+
+/// <reference path="lib.es2015.symbol.d.ts" />
+/// <reference path="lib.es2015.symbol.wellknown.d.ts" />
+
+interface SharedArrayBuffer {
+    /**
+     * Read-only. The length of the ArrayBuffer (in bytes).
+     */
+    readonly byteLength: number;
+
+    /*
+     * The SharedArrayBuffer constructor's length property whose value is 1.
+     */
+    length: number;
+    /**
+     * Returns a section of an SharedArrayBuffer.
+     */
+    slice(begin: number, end?: number): SharedArrayBuffer;
+    readonly [Symbol.species]: SharedArrayBuffer;
+    readonly [Symbol.toStringTag]: "SharedArrayBuffer";
+}
+
+interface SharedArrayBufferConstructor {
+    readonly prototype: SharedArrayBuffer;
+    new (byteLength: number): SharedArrayBuffer;
+}
+declare var SharedArrayBuffer: SharedArrayBufferConstructor;
+
+interface ArrayBufferTypes {
+    SharedArrayBuffer: SharedArrayBuffer;
+}
+
+interface Atomics {
+    /**
+     * Adds a value to the value at the given position in the array, returning the original value.
+     * Until this atomic operation completes, any other read or write operation against the array
+     * will block.
+     */
+    add(typedArray: Int8Array | Uint8Array | Int16Array | Uint16Array | Int32Array | Uint32Array, index: number, value: number): number;
+
+    /**
+     * Stores the bitwise AND of a value with the value at the given position in the array,
+     * returning the original value. Until this atomic operation completes, any other read or
+     * write operation against the array will block.
+     */
+    and(typedArray: Int8Array | Uint8Array | Int16Array | Uint16Array | Int32Array | Uint32Array, index: number, value: number): number;
+
+    /**
+     * Replaces the value at the given position in the array if the original value equals the given
+     * expected value, returning the original value. Until this atomic operation completes, any
+     * other read or write operation against the array will block.
+     */
+    compareExchange(typedArray: Int8Array | Uint8Array | Int16Array | Uint16Array | Int32Array | Uint32Array, index: number, expectedValue: number, replacementValue: number): number;
+
+    /**
+     * Replaces the value at the given position in the array, returning the original value. Until
+     * this atomic operation completes, any other read or write operation against the array will
+     * block.
+     */
+    exchange(typedArray: Int8Array | Uint8Array | Int16Array | Uint16Array | Int32Array | Uint32Array, index: number, value: number): number;
+
+    /**
+     * Returns a value indicating whether high-performance algorithms can use atomic operations
+     * (`true`) or must use locks (`false`) for the given number of bytes-per-element of a typed
+     * array.
+     */
+    isLockFree(size: number): boolean;
+
+    /**
+     * Returns the value at the given position in the array. Until this atomic operation completes,
+     * any other read or write operation against the array will block.
+     */
+    load(typedArray: Int8Array | Uint8Array | Int16Array | Uint16Array | Int32Array | Uint32Array, index: number): number;
+
+    /**
+     * Stores the bitwise OR of a value with the value at the given position in the array,
+     * returning the original value. Until this atomic operation completes, any other read or write
+     * operation against the array will block.
+     */
+    or(typedArray: Int8Array | Uint8Array | Int16Array | Uint16Array | Int32Array | Uint32Array, index: number, value: number): number;
+
+    /**
+     * Stores a value at the given position in the array, returning the new value. Until this
+     * atomic operation completes, any other read or write operation against the array will block.
+     */
+    store(typedArray: Int8Array | Uint8Array | Int16Array | Uint16Array | Int32Array | Uint32Array, index: number, value: number): number;
+
+    /**
+     * Subtracts a value from the value at the given position in the array, returning the original
+     * value. Until this atomic operation completes, any other read or write operation against the
+     * array will block.
+     */
+    sub(typedArray: Int8Array | Uint8Array | Int16Array | Uint16Array | Int32Array | Uint32Array, index: number, value: number): number;
+
+    /**
+     * If the value at the given position in the array is equal to the provided value, the current
+     * agent is put to sleep causing execution to suspend until the timeout expires (returning
+     * `"timed-out"`) or until the agent is awoken (returning `"ok"`); otherwise, returns
+     * `"not-equal"`.
+     */
+    wait(typedArray: Int32Array, index: number, value: number, timeout?: number): "ok" | "not-equal" | "timed-out";
+
+    /**
+     * Wakes up sleeping agents that are waiting on the given index of the array, returning the
+     * number of agents that were awoken.
+     */
+    wake(typedArray: Int32Array, index: number, count: number): number;
+
+    /**
+     * Stores the bitwise XOR of a value with the value at the given position in the array,
+     * returning the original value. Until this atomic operation completes, any other read or write
+     * operation against the array will block.
+     */
+    xor(typedArray: Int8Array | Uint8Array | Int16Array | Uint16Array | Int32Array | Uint32Array, index: number, value: number): number;
+
+    readonly [Symbol.toStringTag]: "Atomics";
+}
+
+declare var Atomics: Atomics;
\ No newline at end of file
diff --git a/bin/lib.es2017.string.d.ts b/bin/lib.es2017.string.d.ts
new file mode 100644
index 0000000..dad64f0
--- /dev/null
+++ b/bin/lib.es2017.string.d.ts
@@ -0,0 +1,47 @@
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved. 
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0  
+ 
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
+MERCHANTABLITY OR NON-INFRINGEMENT. 
+ 
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+
+
+
+/// <reference no-default-lib="true"/>
+
+
+interface String {
+    /**
+     * Pads the current string with a given string (possibly repeated) so that the resulting string reaches a given length.
+     * The padding is applied from the start (left) of the current string.
+     *
+     * @param maxLength The length of the resulting string once the current string has been padded.
+     *        If this parameter is smaller than the current string's length, the current string will be returned as it is.
+     *
+     * @param fillString The string to pad the current string with.
+     *        If this string is too long, it will be truncated and the left-most part will be applied.
+     *        The default value for this parameter is " " (U+0020).
+     */
+    padStart(maxLength: number, fillString?: string): string;
+
+    /**
+     * Pads the current string with a given string (possibly repeated) so that the resulting string reaches a given length.
+     * The padding is applied from the end (right) of the current string.
+     *
+     * @param maxLength The length of the resulting string once the current string has been padded.
+     *        If this parameter is smaller than the current string's length, the current string will be returned as it is.
+     *
+     * @param fillString The string to pad the current string with.
+     *        If this string is too long, it will be truncated and the left-most part will be applied.
+     *        The default value for this parameter is " " (U+0020).
+     */
+    padEnd(maxLength: number, fillString?: string): string;
+}
diff --git a/bin/lib.es5.d.ts b/bin/lib.es5.d.ts
index 5df0d7d..f628dc4 100644
--- a/bin/lib.es5.d.ts
+++ b/bin/lib.es5.d.ts
@@ -1,4124 +1,4082 @@
-/*! *****************************************************************************
-Copyright (c) Microsoft Corporation. All rights reserved. 
-Licensed under the Apache License, Version 2.0 (the "License"); you may not use
-this file except in compliance with the License. You may obtain a copy of the
-License at http://www.apache.org/licenses/LICENSE-2.0  
- 
-THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
-WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
-MERCHANTABLITY OR NON-INFRINGEMENT. 
- 
-See the Apache Version 2.0 License for specific language governing permissions
-and limitations under the License.
-***************************************************************************** */
-
-/// <reference no-default-lib="true"/>
-/////////////////////////////
-/// ECMAScript APIs
-/////////////////////////////
-
-declare const NaN: number;
-declare const Infinity: number;
-
-/**
-  * Evaluates JavaScript code and executes it.
-  * @param x A String value that contains valid JavaScript code.
-  */
-declare function eval(x: string): any;
-
-/**
-  * Converts A string to an integer.
-  * @param s A string to convert into a number.
-  * @param radix A value between 2 and 36 that specifies the base of the number in numString.
-  * If this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.
-  * All other strings are considered decimal.
-  */
-declare function parseInt(s: string, radix?: number): number;
-
-/**
-  * Converts a string to a floating-point number.
-  * @param string A string that contains a floating-point number.
-  */
-declare function parseFloat(string: string): number;
-
-/**
-  * Returns a Boolean value that indicates whether a value is the reserved value NaN (not a number).
-  * @param number A numeric value.
-  */
-declare function isNaN(number: number): boolean;
-
-/**
-  * Determines whether a supplied number is finite.
-  * @param number Any numeric value.
-  */
-declare function isFinite(number: number): boolean;
-
-/**
-  * Gets the unencoded version of an encoded Uniform Resource Identifier (URI).
-  * @param encodedURI A value representing an encoded URI.
-  */
-declare function decodeURI(encodedURI: string): string;
-
-/**
-  * Gets the unencoded version of an encoded component of a Uniform Resource Identifier (URI).
-  * @param encodedURIComponent A value representing an encoded URI component.
-  */
-declare function decodeURIComponent(encodedURIComponent: string): string;
-
-/**
-  * Encodes a text string as a valid Uniform Resource Identifier (URI)
-  * @param uri A value representing an encoded URI.
-  */
-declare function encodeURI(uri: string): string;
-
-/**
-  * Encodes a text string as a valid component of a Uniform Resource Identifier (URI).
-  * @param uriComponent A value representing an encoded URI component.
-  */
-declare function encodeURIComponent(uriComponent: string): string;
-
-interface PropertyDescriptor {
-    configurable?: boolean;
-    enumerable?: boolean;
-    value?: any;
-    writable?: boolean;
-    get? (): any;
-    set? (v: any): void;
-}
-
-interface PropertyDescriptorMap {
-    [s: string]: PropertyDescriptor;
-}
-
-interface Object {
-    /** The initial value of Object.prototype.constructor is the standard built-in Object constructor. */
-    constructor: Function;
-
-    /** Returns a string representation of an object. */
-    toString(): string;
-
-    /** Returns a date converted to a string using the current locale. */
-    toLocaleString(): string;
-
-    /** Returns the primitive value of the specified object. */
-    valueOf(): Object;
-
-    /**
-      * Determines whether an object has a property with the specified name.
-      * @param v A property name.
-      */
-    hasOwnProperty(v: string): boolean;
-
-    /**
-      * Determines whether an object exists in another object's prototype chain.
-      * @param v Another object whose prototype chain is to be checked.
-      */
-    isPrototypeOf(v: Object): boolean;
-
-    /**
-      * Determines whether a specified property is enumerable.
-      * @param v A property name.
-      */
-    propertyIsEnumerable(v: string): boolean;
-}
-
-interface ObjectConstructor {
-    new (value?: any): Object;
-    (): any;
-    (value: any): any;
-
-    /** A reference to the prototype for a class of objects. */
-    readonly prototype: Object;
-
-    /**
-      * Returns the prototype of an object.
-      * @param o The object that references the prototype.
-      */
-    getPrototypeOf(o: any): any;
-
-    /**
-      * Gets the own property descriptor of the specified object.
-      * An own property descriptor is one that is defined directly on the object and is not inherited from the object's prototype.
-      * @param o Object that contains the property.
-      * @param p Name of the property.
-    */
-    getOwnPropertyDescriptor(o: any, p: string): PropertyDescriptor;
-
-    /**
-      * Returns the names of the own properties of an object. The own properties of an object are those that are defined directly
-      * on that object, and are not inherited from the object's prototype. The properties of an object include both fields (objects) and functions.
-      * @param o Object that contains the own properties.
-      */
-    getOwnPropertyNames(o: any): string[];
-
-    /**
-      * Creates an object that has null prototype.
-      * @param o Object to use as a prototype. May be null
-      */
-    create(o: null): any;
-
-    /**
-      * Creates an object that has the specified prototype, and that optionally contains specified properties.
-      * @param o Object to use as a prototype. May be null
-      */
-    create<T>(o: T): T;
-
-    /**
-      * Creates an object that has the specified prototype, and that optionally contains specified properties.
-      * @param o Object to use as a prototype. May be null
-      * @param properties JavaScript object that contains one or more property descriptors.
-      */
-    create(o: any, properties: PropertyDescriptorMap): any;
-
-    /**
-      * Adds a property to an object, or modifies attributes of an existing property.
-      * @param o Object on which to add or modify the property. This can be a native JavaScript object (that is, a user-defined object or a built in object) or a DOM object.
-      * @param p The property name.
-      * @param attributes Descriptor for the property. It can be for a data property or an accessor property.
-      */
-    defineProperty(o: any, p: string, attributes: PropertyDescriptor): any;
-
-    /**
-      * Adds one or more properties to an object, and/or modifies attributes of existing properties.
-      * @param o Object on which to add or modify the properties. This can be a native JavaScript object or a DOM object.
-      * @param properties JavaScript object that contains one or more descriptor objects. Each descriptor object describes a data property or an accessor property.
-      */
-    defineProperties(o: any, properties: PropertyDescriptorMap): any;
-
-    /**
-      * Prevents the modification of attributes of existing properties, and prevents the addition of new properties.
-      * @param o Object on which to lock the attributes.
-      */
-    seal<T>(o: T): T;
-
-    /**
-      * Prevents the modification of existing property attributes and values, and prevents the addition of new properties.
-      * @param o Object on which to lock the attributes.
-      */
-    freeze<T>(o: T): T;
-
-    /**
-      * Prevents the addition of new properties to an object.
-      * @param o Object to make non-extensible.
-      */
-    preventExtensions<T>(o: T): T;
-
-    /**
-      * Returns true if existing property attributes cannot be modified in an object and new properties cannot be added to the object.
-      * @param o Object to test.
-      */
-    isSealed(o: any): boolean;
-
-    /**
-      * Returns true if existing property attributes and values cannot be modified in an object, and new properties cannot be added to the object.
-      * @param o Object to test.
-      */
-    isFrozen(o: any): boolean;
-
-    /**
-      * Returns a value that indicates whether new properties can be added to an object.
-      * @param o Object to test.
-      */
-    isExtensible(o: any): boolean;
-
-    /**
-      * Returns the names of the enumerable properties and methods of an object.
-      * @param o Object that contains the properties and methods. This can be an object that you created or an existing Document Object Model (DOM) object.
-      */
-    keys(o: any): string[];
-}
-
-/**
-  * Provides functionality common to all JavaScript objects.
-  */
-declare const Object: ObjectConstructor;
-
-/**
-  * Creates a new function.
-  */
-interface Function {
-    /**
-      * Calls the function, substituting the specified object for the this value of the function, and the specified array for the arguments of the function.
-      * @param thisArg The object to be used as the this object.
-      * @param argArray A set of arguments to be passed to the function.
-      */
-    apply(this: Function, thisArg: any, argArray?: any): any;
-
-    /**
-      * Calls a method of an object, substituting another object for the current object.
-      * @param thisArg The object to be used as the current object.
-      * @param argArray A list of arguments to be passed to the method.
-      */
-    call(this: Function, thisArg: any, ...argArray: any[]): any;
-
-    /**
-      * For a given function, creates a bound function that has the same body as the original function.
-      * The this object of the bound function is associated with the specified object, and has the specified initial parameters.
-      * @param thisArg An object to which the this keyword can refer inside the new function.
-      * @param argArray A list of arguments to be passed to the new function.
-      */
-    bind(this: Function, thisArg: any, ...argArray: any[]): any;
-
-    prototype: any;
-    readonly length: number;
-
-    // Non-standard extensions
-    arguments: any;
-    caller: Function;
-}
-
-interface FunctionConstructor {
-    /**
-      * Creates a new function.
-      * @param args A list of arguments the function accepts.
-      */
-    new (...args: string[]): Function;
-    (...args: string[]): Function;
-    readonly prototype: Function;
-}
-
-declare const Function: FunctionConstructor;
-
-interface IArguments {
-    [index: number]: any;
-    length: number;
-    callee: Function;
-}
-
-interface String {
-    /** Returns a string representation of a string. */
-    toString(): string;
-
-    /**
-      * Returns the character at the specified index.
-      * @param pos The zero-based index of the desired character.
-      */
-    charAt(pos: number): string;
-
-    /**
-      * Returns the Unicode value of the character at the specified location.
-      * @param index The zero-based index of the desired character. If there is no character at the specified index, NaN is returned.
-      */
-    charCodeAt(index: number): number;
-
-    /**
-      * Returns a string that contains the concatenation of two or more strings.
-      * @param strings The strings to append to the end of the string.
-      */
-    concat(...strings: string[]): string;
-
-    /**
-      * Returns the position of the first occurrence of a substring.
-      * @param searchString The substring to search for in the string
-      * @param position The index at which to begin searching the String object. If omitted, search starts at the beginning of the string.
-      */
-    indexOf(searchString: string, position?: number): number;
-
-    /**
-      * Returns the last occurrence of a substring in the string.
-      * @param searchString The substring to search for.
-      * @param position The index at which to begin searching. If omitted, the search begins at the end of the string.
-      */
-    lastIndexOf(searchString: string, position?: number): number;
-
-    /**
-      * Determines whether two strings are equivalent in the current locale.
-      * @param that String to compare to target string
-      */
-    localeCompare(that: string): number;
-
-    /**
-      * Matches a string with a regular expression, and returns an array containing the results of that search.
-      * @param regexp A variable name or string literal containing the regular expression pattern and flags.
-      */
-    match(regexp: string): RegExpMatchArray | null;
-
-    /**
-      * Matches a string with a regular expression, and returns an array containing the results of that search.
-      * @param regexp A regular expression object that contains the regular expression pattern and applicable flags.
-      */
-    match(regexp: RegExp): RegExpMatchArray | null;
-
-    /**
-      * Replaces text in a string, using a regular expression or search string.
-      * @param searchValue A string that represents the regular expression.
-      * @param replaceValue A string containing the text to replace for every successful match of searchValue in this string.
-      */
-    replace(searchValue: string, replaceValue: string): string;
-
-    /**
-      * Replaces text in a string, using a regular expression or search string.
-      * @param searchValue A string that represents the regular expression.
-      * @param replacer A function that returns the replacement text.
-      */
-    replace(searchValue: string, replacer: (substring: string, ...args: any[]) => string): string;
-
-    /**
-      * Replaces text in a string, using a regular expression or search string.
-      * @param searchValue A Regular Expression object containing the regular expression pattern and applicable flags.
-      * @param replaceValue A string containing the text to replace for every successful match of searchValue in this string.
-      */
-    replace(searchValue: RegExp, replaceValue: string): string;
-
-    /**
-      * Replaces text in a string, using a regular expression or search string.
-      * @param searchValue A Regular Expression object containing the regular expression pattern and applicable flags
-      * @param replacer A function that returns the replacement text.
-      */
-    replace(searchValue: RegExp, replacer: (substring: string, ...args: any[]) => string): string;
-
-    /**
-      * Finds the first substring match in a regular expression search.
-      * @param regexp The regular expression pattern and applicable flags.
-      */
-    search(regexp: string): number;
-
-    /**
-      * Finds the first substring match in a regular expression search.
-      * @param regexp The regular expression pattern and applicable flags.
-      */
-    search(regexp: RegExp): number;
-
-    /**
-      * Returns a section of a string.
-      * @param start The index to the beginning of the specified portion of stringObj.
-      * @param end The index to the end of the specified portion of stringObj. The substring includes the characters up to, but not including, the character indicated by end.
-      * If this value is not specified, the substring continues to the end of stringObj.
-      */
-    slice(start?: number, end?: number): string;
-
-    /**
-      * Split a string into substrings using the specified separator and return them as an array.
-      * @param separator A string that identifies character or characters to use in separating the string. If omitted, a single-element array containing the entire string is returned.
-      * @param limit A value used to limit the number of elements returned in the array.
-      */
-    split(separator: string, limit?: number): string[];
-
-    /**
-      * Split a string into substrings using the specified separator and return them as an array.
-      * @param separator A Regular Express that identifies character or characters to use in separating the string. If omitted, a single-element array containing the entire string is returned.
-      * @param limit A value used to limit the number of elements returned in the array.
-      */
-    split(separator: RegExp, limit?: number): string[];
-
-    /**
-      * Returns the substring at the specified location within a String object.
-      * @param start The zero-based index number indicating the beginning of the substring.
-      * @param end Zero-based index number indicating the end of the substring. The substring includes the characters up to, but not including, the character indicated by end.
-      * If end is omitted, the characters from start through the end of the original string are returned.
-      */
-    substring(start: number, end?: number): string;
-
-    /** Converts all the alphabetic characters in a string to lowercase. */
-    toLowerCase(): string;
-
-    /** Converts all alphabetic characters to lowercase, taking into account the host environment's current locale. */
-    toLocaleLowerCase(): string;
-
-    /** Converts all the alphabetic characters in a string to uppercase. */
-    toUpperCase(): string;
-
-    /** Returns a string where all alphabetic characters have been converted to uppercase, taking into account the host environment's current locale. */
-    toLocaleUpperCase(): string;
-
-    /** Removes the leading and trailing white space and line terminator characters from a string. */
-    trim(): string;
-
-    /** Returns the length of a String object. */
-    readonly length: number;
-
-    // IE extensions
-    /**
-      * Gets a substring beginning at the specified location and having the specified length.
-      * @param from The starting position of the desired substring. The index of the first character in the string is zero.
-      * @param length The number of characters to include in the returned substring.
-      */
-    substr(from: number, length?: number): string;
-
-    /** Returns the primitive value of the specified object. */
-    valueOf(): string;
-
-    readonly [index: number]: string;
-}
-
-interface StringConstructor {
-    new (value?: any): String;
-    (value?: any): string;
-    readonly prototype: String;
-    fromCharCode(...codes: number[]): string;
-}
-
-/**
-  * Allows manipulation and formatting of text strings and determination and location of substrings within strings.
-  */
-declare const String: StringConstructor;
-
-interface Boolean {
-    /** Returns the primitive value of the specified object. */
-    valueOf(): boolean;
-}
-
-interface BooleanConstructor {
-    new (value?: any): Boolean;
-    (value?: any): boolean;
-    readonly prototype: Boolean;
-}
-
-declare const Boolean: BooleanConstructor;
-
-interface Number {
-    /**
-      * Returns a string representation of an object.
-      * @param radix Specifies a radix for converting numeric values to strings. This value is only used for numbers.
-      */
-    toString(radix?: number): string;
-
-    /**
-      * Returns a string representing a number in fixed-point notation.
-      * @param fractionDigits Number of digits after the decimal point. Must be in the range 0 - 20, inclusive.
-      */
-    toFixed(fractionDigits?: number): string;
-
-    /**
-      * Returns a string containing a number represented in exponential notation.
-      * @param fractionDigits Number of digits after the decimal point. Must be in the range 0 - 20, inclusive.
-      */
-    toExponential(fractionDigits?: number): string;
-
-    /**
-      * Returns a string containing a number represented either in exponential or fixed-point notation with a specified number of digits.
-      * @param precision Number of significant digits. Must be in the range 1 - 21, inclusive.
-      */
-    toPrecision(precision?: number): string;
-
-    /** Returns the primitive value of the specified object. */
-    valueOf(): number;
-}
-
-interface NumberConstructor {
-    new (value?: any): Number;
-    (value?: any): number;
-    readonly prototype: Number;
-
-    /** The largest number that can be represented in JavaScript. Equal to approximately 1.79E+308. */
-    readonly MAX_VALUE: number;
-
-    /** The closest number to zero that can be represented in JavaScript. Equal to approximately 5.00E-324. */
-    readonly MIN_VALUE: number;
-
-    /**
-      * A value that is not a number.
-      * In equality comparisons, NaN does not equal any value, including itself. To test whether a value is equivalent to NaN, use the isNaN function.
-      */
-    readonly NaN: number;
-
-    /**
-      * A value that is less than the largest negative number that can be represented in JavaScript.
-      * JavaScript displays NEGATIVE_INFINITY values as -infinity.
-      */
-    readonly NEGATIVE_INFINITY: number;
-
-    /**
-      * A value greater than the largest number that can be represented in JavaScript.
-      * JavaScript displays POSITIVE_INFINITY values as infinity.
-      */
-    readonly POSITIVE_INFINITY: number;
-}
-
-/** An object that represents a number of any kind. All JavaScript numbers are 64-bit floating-point numbers. */
-declare const Number: NumberConstructor;
-
-interface TemplateStringsArray extends ReadonlyArray<string> {
-    readonly raw: ReadonlyArray<string>
-}
-
-interface Math {
-    /** The mathematical constant e. This is Euler's number, the base of natural logarithms. */
-    readonly E: number;
-    /** The natural logarithm of 10. */
-    readonly LN10: number;
-    /** The natural logarithm of 2. */
-    readonly LN2: number;
-    /** The base-2 logarithm of e. */
-    readonly LOG2E: number;
-    /** The base-10 logarithm of e. */
-    readonly LOG10E: number;
-    /** Pi. This is the ratio of the circumference of a circle to its diameter. */
-    readonly PI: number;
-    /** The square root of 0.5, or, equivalently, one divided by the square root of 2. */
-    readonly SQRT1_2: number;
-    /** The square root of 2. */
-    readonly SQRT2: number;
-    /**
-      * Returns the absolute value of a number (the value without regard to whether it is positive or negative).
-      * For example, the absolute value of -5 is the same as the absolute value of 5.
-      * @param x A numeric expression for which the absolute value is needed.
-      */
-    abs(x: number): number;
-    /**
-      * Returns the arc cosine (or inverse cosine) of a number.
-      * @param x A numeric expression.
-      */
-    acos(x: number): number;
-    /**
-      * Returns the arcsine of a number.
-      * @param x A numeric expression.
-      */
-    asin(x: number): number;
-    /**
-      * Returns the arctangent of a number.
-      * @param x A numeric expression for which the arctangent is needed.
-      */
-    atan(x: number): number;
-    /**
-      * Returns the angle (in radians) from the X axis to a point.
-      * @param y A numeric expression representing the cartesian y-coordinate.
-      * @param x A numeric expression representing the cartesian x-coordinate.
-      */
-    atan2(y: number, x: number): number;
-    /**
-      * Returns the smallest number greater than or equal to its numeric argument.
-      * @param x A numeric expression.
-      */
-    ceil(x: number): number;
-    /**
-      * Returns the cosine of a number.
-      * @param x A numeric expression that contains an angle measured in radians.
-      */
-    cos(x: number): number;
-    /**
-      * Returns e (the base of natural logarithms) raised to a power.
-      * @param x A numeric expression representing the power of e.
-      */
-    exp(x: number): number;
-    /**
-      * Returns the greatest number less than or equal to its numeric argument.
-      * @param x A numeric expression.
-      */
-    floor(x: number): number;
-    /**
-      * Returns the natural logarithm (base e) of a number.
-      * @param x A numeric expression.
-      */
-    log(x: number): number;
-    /**
-      * Returns the larger of a set of supplied numeric expressions.
-      * @param values Numeric expressions to be evaluated.
-      */
-    max(...values: number[]): number;
-    /**
-      * Returns the smaller of a set of supplied numeric expressions.
-      * @param values Numeric expressions to be evaluated.
-      */
-    min(...values: number[]): number;
-    /**
-      * Returns the value of a base expression taken to a specified power.
-      * @param x The base value of the expression.
-      * @param y The exponent value of the expression.
-      */
-    pow(x: number, y: number): number;
-    /** Returns a pseudorandom number between 0 and 1. */
-    random(): number;
-    /**
-      * Returns a supplied numeric expression rounded to the nearest number.
-      * @param x The value to be rounded to the nearest number.
-      */
-    round(x: number): number;
-    /**
-      * Returns the sine of a number.
-      * @param x A numeric expression that contains an angle measured in radians.
-      */
-    sin(x: number): number;
-    /**
-      * Returns the square root of a number.
-      * @param x A numeric expression.
-      */
-    sqrt(x: number): number;
-    /**
-      * Returns the tangent of a number.
-      * @param x A numeric expression that contains an angle measured in radians.
-      */
-    tan(x: number): number;
-}
-/** An intrinsic object that provides basic mathematics functionality and constants. */
-declare const Math: Math;
-
-/** Enables basic storage and retrieval of dates and times. */
-interface Date {
-    /** Returns a string representation of a date. The format of the string depends on the locale. */
-    toString(): string;
-    /** Returns a date as a string value. */
-    toDateString(): string;
-    /** Returns a time as a string value. */
-    toTimeString(): string;
-    /** Returns a value as a string value appropriate to the host environment's current locale. */
-    toLocaleString(): string;
-    /** Returns a date as a string value appropriate to the host environment's current locale. */
-    toLocaleDateString(): string;
-    /** Returns a time as a string value appropriate to the host environment's current locale. */
-    toLocaleTimeString(): string;
-    /** Returns the stored time value in milliseconds since midnight, January 1, 1970 UTC. */
-    valueOf(): number;
-    /** Gets the time value in milliseconds. */
-    getTime(): number;
-    /** Gets the year, using local time. */
-    getFullYear(): number;
-    /** Gets the year using Universal Coordinated Time (UTC). */
-    getUTCFullYear(): number;
-    /** Gets the month, using local time. */
-    getMonth(): number;
-    /** Gets the month of a Date object using Universal Coordinated Time (UTC). */
-    getUTCMonth(): number;
-    /** Gets the day-of-the-month, using local time. */
-    getDate(): number;
-    /** Gets the day-of-the-month, using Universal Coordinated Time (UTC). */
-    getUTCDate(): number;
-    /** Gets the day of the week, using local time. */
-    getDay(): number;
-    /** Gets the day of the week using Universal Coordinated Time (UTC). */
-    getUTCDay(): number;
-    /** Gets the hours in a date, using local time. */
-    getHours(): number;
-    /** Gets the hours value in a Date object using Universal Coordinated Time (UTC). */
-    getUTCHours(): number;
-    /** Gets the minutes of a Date object, using local time. */
-    getMinutes(): number;
-    /** Gets the minutes of a Date object using Universal Coordinated Time (UTC). */
-    getUTCMinutes(): number;
-    /** Gets the seconds of a Date object, using local time. */
-    getSeconds(): number;
-    /** Gets the seconds of a Date object using Universal Coordinated Time (UTC). */
-    getUTCSeconds(): number;
-    /** Gets the milliseconds of a Date, using local time. */
-    getMilliseconds(): number;
-    /** Gets the milliseconds of a Date object using Universal Coordinated Time (UTC). */
-    getUTCMilliseconds(): number;
-    /** Gets the difference in minutes between the time on the local computer and Universal Coordinated Time (UTC). */
-    getTimezoneOffset(): number;
-    /**
-      * Sets the date and time value in the Date object.
-      * @param time A numeric value representing the number of elapsed milliseconds since midnight, January 1, 1970 GMT.
-      */
-    setTime(time: number): number;
-    /**
-      * Sets the milliseconds value in the Date object using local time.
-      * @param ms A numeric value equal to the millisecond value.
-      */
-    setMilliseconds(ms: number): number;
-    /**
-      * Sets the milliseconds value in the Date object using Universal Coordinated Time (UTC).
-      * @param ms A numeric value equal to the millisecond value.
-      */
-    setUTCMilliseconds(ms: number): number;
-
-    /**
-      * Sets the seconds value in the Date object using local time.
-      * @param sec A numeric value equal to the seconds value.
-      * @param ms A numeric value equal to the milliseconds value.
-      */
-    setSeconds(sec: number, ms?: number): number;
-    /**
-      * Sets the seconds value in the Date object using Universal Coordinated Time (UTC).
-      * @param sec A numeric value equal to the seconds value.
-      * @param ms A numeric value equal to the milliseconds value.
-      */
-    setUTCSeconds(sec: number, ms?: number): number;
-    /**
-      * Sets the minutes value in the Date object using local time.
-      * @param min A numeric value equal to the minutes value.
-      * @param sec A numeric value equal to the seconds value.
-      * @param ms A numeric value equal to the milliseconds value.
-      */
-    setMinutes(min: number, sec?: number, ms?: number): number;
-    /**
-      * Sets the minutes value in the Date object using Universal Coordinated Time (UTC).
-      * @param min A numeric value equal to the minutes value.
-      * @param sec A numeric value equal to the seconds value.
-      * @param ms A numeric value equal to the milliseconds value.
-      */
-    setUTCMinutes(min: number, sec?: number, ms?: number): number;
-    /**
-      * Sets the hour value in the Date object using local time.
-      * @param hours A numeric value equal to the hours value.
-      * @param min A numeric value equal to the minutes value.
-      * @param sec A numeric value equal to the seconds value.
-      * @param ms A numeric value equal to the milliseconds value.
-      */
-    setHours(hours: number, min?: number, sec?: number, ms?: number): number;
-    /**
-      * Sets the hours value in the Date object using Universal Coordinated Time (UTC).
-      * @param hours A numeric value equal to the hours value.
-      * @param min A numeric value equal to the minutes value.
-      * @param sec A numeric value equal to the seconds value.
-      * @param ms A numeric value equal to the milliseconds value.
-      */
-    setUTCHours(hours: number, min?: number, sec?: number, ms?: number): number;
-    /**
-      * Sets the numeric day-of-the-month value of the Date object using local time.
-      * @param date A numeric value equal to the day of the month.
-      */
-    setDate(date: number): number;
-    /**
-      * Sets the numeric day of the month in the Date object using Universal Coordinated Time (UTC).
-      * @param date A numeric value equal to the day of the month.
-      */
-    setUTCDate(date: number): number;
-    /**
-      * Sets the month value in the Date object using local time.
-      * @param month A numeric value equal to the month. The value for January is 0, and other month values follow consecutively.
-      * @param date A numeric value representing the day of the month. If this value is not supplied, the value from a call to the getDate method is used.
-      */
-    setMonth(month: number, date?: number): number;
-    /**
-      * Sets the month value in the Date object using Universal Coordinated Time (UTC).
-      * @param month A numeric value equal to the month. The value for January is 0, and other month values follow consecutively.
-      * @param date A numeric value representing the day of the month. If it is not supplied, the value from a call to the getUTCDate method is used.
-      */
-    setUTCMonth(month: number, date?: number): number;
-    /**
-      * Sets the year of the Date object using local time.
-      * @param year A numeric value for the year.
-      * @param month A zero-based numeric value for the month (0 for January, 11 for December). Must be specified if numDate is specified.
-      * @param date A numeric value equal for the day of the month.
-      */
-    setFullYear(year: number, month?: number, date?: number): number;
-    /**
-      * Sets the year value in the Date object using Universal Coordinated Time (UTC).
-      * @param year A numeric value equal to the year.
-      * @param month A numeric value equal to the month. The value for January is 0, and other month values follow consecutively. Must be supplied if numDate is supplied.
-      * @param date A numeric value equal to the day of the month.
-      */
-    setUTCFullYear(year: number, month?: number, date?: number): number;
-    /** Returns a date converted to a string using Universal Coordinated Time (UTC). */
-    toUTCString(): string;
-    /** Returns a date as a string value in ISO format. */
-    toISOString(): string;
-    /** Used by the JSON.stringify method to enable the transformation of an object's data for JavaScript Object Notation (JSON) serialization. */
-    toJSON(key?: any): string;
-}
-
-interface DateConstructor {
-    new (): Date;
-    new (value: number): Date;
-    new (value: string): Date;
-    new (year: number, month: number, date?: number, hours?: number, minutes?: number, seconds?: number, ms?: number): Date;
-    (): string;
-    readonly prototype: Date;
-    /**
-      * Parses a string containing a date, and returns the number of milliseconds between that date and midnight, January 1, 1970.
-      * @param s A date string
-      */
-    parse(s: string): number;
-    /**
-      * Returns the number of milliseconds between midnight, January 1, 1970 Universal Coordinated Time (UTC) (or GMT) and the specified date.
-      * @param year The full year designation is required for cross-century date accuracy. If year is between 0 and 99 is used, then year is assumed to be 1900 + year.
-      * @param month The month as an number between 0 and 11 (January to December).
-      * @param date The date as an number between 1 and 31.
-      * @param hours Must be supplied if minutes is supplied. An number from 0 to 23 (midnight to 11pm) that specifies the hour.
-      * @param minutes Must be supplied if seconds is supplied. An number from 0 to 59 that specifies the minutes.
-      * @param seconds Must be supplied if milliseconds is supplied. An number from 0 to 59 that specifies the seconds.
-      * @param ms An number from 0 to 999 that specifies the milliseconds.
-      */
-    UTC(year: number, month: number, date?: number, hours?: number, minutes?: number, seconds?: number, ms?: number): number;
-    now(): number;
-}
-
-declare const Date: DateConstructor;
-
-interface RegExpMatchArray extends Array<string> {
-    index?: number;
-    input?: string;
-}
-
-interface RegExpExecArray extends Array<string> {
-    index: number;
-    input: string;
-}
-
-interface RegExp {
-    /**
-      * Executes a search on a string using a regular expression pattern, and returns an array containing the results of that search.
-      * @param string The String object or string literal on which to perform the search.
-      */
-    exec(string: string): RegExpExecArray | null;
-
-    /**
-      * Returns a Boolean value that indicates whether or not a pattern exists in a searched string.
-      * @param string String on which to perform the search.
-      */
-    test(string: string): boolean;
-
-    /** Returns a copy of the text of the regular expression pattern. Read-only. The regExp argument is a Regular expression object. It can be a variable name or a literal. */
-    readonly source: string;
-
-    /** Returns a Boolean value indicating the state of the global flag (g) used with a regular expression. Default is false. Read-only. */
-    readonly global: boolean;
-
-    /** Returns a Boolean value indicating the state of the ignoreCase flag (i) used with a regular expression. Default is false. Read-only. */
-    readonly ignoreCase: boolean;
-
-    /** Returns a Boolean value indicating the state of the multiline flag (m) used with a regular expression. Default is false. Read-only. */
-    readonly multiline: boolean;
-
-    lastIndex: number;
-
-    // Non-standard extensions
-    compile(): this;
-}
-
-interface RegExpConstructor {
-    new (pattern: RegExp): RegExp;
-    new (pattern: string, flags?: string): RegExp;
-    (pattern: RegExp): RegExp;
-    (pattern: string, flags?: string): RegExp;
-    readonly prototype: RegExp;
-
-    // Non-standard extensions
-    $1: string;
-    $2: string;
-    $3: string;
-    $4: string;
-    $5: string;
-    $6: string;
-    $7: string;
-    $8: string;
-    $9: string;
-    lastMatch: string;
-}
-
-declare const RegExp: RegExpConstructor;
-
-interface Error {
-    name: string;
-    message: string;
-    stack?: string;
-}
-
-interface ErrorConstructor {
-    new (message?: string): Error;
-    (message?: string): Error;
-    readonly prototype: Error;
-}
-
-declare const Error: ErrorConstructor;
-
-interface EvalError extends Error {
-}
-
-interface EvalErrorConstructor {
-    new (message?: string): EvalError;
-    (message?: string): EvalError;
-    readonly prototype: EvalError;
-}
-
-declare const EvalError: EvalErrorConstructor;
-
-interface RangeError extends Error {
-}
-
-interface RangeErrorConstructor {
-    new (message?: string): RangeError;
-    (message?: string): RangeError;
-    readonly prototype: RangeError;
-}
-
-declare const RangeError: RangeErrorConstructor;
-
-interface ReferenceError extends Error {
-}
-
-interface ReferenceErrorConstructor {
-    new (message?: string): ReferenceError;
-    (message?: string): ReferenceError;
-    readonly prototype: ReferenceError;
-}
-
-declare const ReferenceError: ReferenceErrorConstructor;
-
-interface SyntaxError extends Error {
-}
-
-interface SyntaxErrorConstructor {
-    new (message?: string): SyntaxError;
-    (message?: string): SyntaxError;
-    readonly prototype: SyntaxError;
-}
-
-declare const SyntaxError: SyntaxErrorConstructor;
-
-interface TypeError extends Error {
-}
-
-interface TypeErrorConstructor {
-    new (message?: string): TypeError;
-    (message?: string): TypeError;
-    readonly prototype: TypeError;
-}
-
-declare const TypeError: TypeErrorConstructor;
-
-interface URIError extends Error {
-}
-
-interface URIErrorConstructor {
-    new (message?: string): URIError;
-    (message?: string): URIError;
-    readonly prototype: URIError;
-}
-
-declare const URIError: URIErrorConstructor;
-
-interface JSON {
-    /**
-      * Converts a JavaScript Object Notation (JSON) string into an object.
-      * @param text A valid JSON string.
-      * @param reviver A function that transforms the results. This function is called for each member of the object.
-      * If a member contains nested objects, the nested objects are transformed before the parent object is.
-      */
-    parse(text: string, reviver?: (key: any, value: any) => any): any;
-    /**
-      * Converts a JavaScript value to a JavaScript Object Notation (JSON) string.
-      * @param value A JavaScript value, usually an object or array, to be converted.
-      * @param replacer A function that transforms the results.
-      * @param space Adds indentation, white space, and line break characters to the return-value JSON text to make it easier to read.
-      */
-    stringify(value: any, replacer?: (key: string, value: any) => any, space?: string | number): string;
-    /**
-      * Converts a JavaScript value to a JavaScript Object Notation (JSON) string.
-      * @param value A JavaScript value, usually an object or array, to be converted.
-      * @param replacer An array of strings and numbers that acts as a approved list for selecting the object properties that will be stringified.
-      * @param space Adds indentation, white space, and line break characters to the return-value JSON text to make it easier to read.
-      */
-    stringify(value: any, replacer?: (number | string)[] | null, space?: string | number): string;
-}
-
-/**
-  * An intrinsic object that provides functions to convert JavaScript values to and from the JavaScript Object Notation (JSON) format.
-  */
-declare const JSON: JSON;
-
-
-/////////////////////////////
-/// ECMAScript Array API (specially handled by compiler)
-/////////////////////////////
-
-interface ReadonlyArray<T> {
-    /**
-      * Gets the length of the array. This is a number one higher than the highest element defined in an array.
-      */
-    readonly length: number;
-    /**
-      * Returns a string representation of an array.
-      */
-    toString(): string;
-    toLocaleString(): string;
-    /**
-      * Combines two or more arrays.
-      * @param items Additional items to add to the end of array1.
-      */
-    concat<U extends ReadonlyArray<T>>(...items: U[]): T[];
-    /**
-      * Combines two or more arrays.
-      * @param items Additional items to add to the end of array1.
-      */
-    concat(...items: T[][]): T[];
-    /**
-      * Combines two or more arrays.
-      * @param items Additional items to add to the end of array1.
-      */
-    concat(...items: (T | T[])[]): T[];
-    /**
-      * Adds all the elements of an array separated by the specified separator string.
-      * @param separator A string used to separate one element of an array from the next in the resulting String. If omitted, the array elements are separated with a comma.
-      */
-    join(separator?: string): string;
-    /**
-      * Returns a section of an array.
-      * @param start The beginning of the specified portion of the array.
-      * @param end The end of the specified portion of the array.
-      */
-    slice(start?: number, end?: number): T[];
-    /**
-      * Returns the index of the first occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the search starts at index 0.
-      */
-    indexOf(searchElement: T, fromIndex?: number): number;
-
-    /**
-      * Returns the index of the last occurrence of a specified value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the search starts at the last index in the array.
-      */
-    lastIndexOf(searchElement: T, fromIndex?: number): number;
-    /**
-      * Determines whether all the members of an array satisfy the specified test.
-      * @param callbackfn A function that accepts up to three arguments. The every method calls the callbackfn function for each element in array1 until the callbackfn returns false, or until the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
-      */
-    every(callbackfn: (value: T, index: number, array: ReadonlyArray<T>) => boolean, thisArg?: any): boolean;
-    /**
-      * Determines whether the specified callback function returns true for any element of an array.
-      * @param callbackfn A function that accepts up to three arguments. The some method calls the callbackfn function for each element in array1 until the callbackfn returns true, or until the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
-      */
-    some(callbackfn: (value: T, index: number, array: ReadonlyArray<T>) => boolean, thisArg?: any): boolean;
-    /**
-      * Performs the specified action for each element in an array.
-      * @param callbackfn  A function that accepts up to three arguments. forEach calls the callbackfn function one time for each element in the array.
-      * @param thisArg  An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
-      */
-    forEach(callbackfn: (value: T, index: number, array: ReadonlyArray<T>) => void, thisArg?: any): void;
-    /**
-      * Calls a defined callback function on each element of an array, and returns an array that contains the results.
-      * @param callbackfn A function that accepts up to three arguments. The map method calls the callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
-      */
-    map<U>(callbackfn: (value: T, index: number, array: ReadonlyArray<T>) => U, thisArg?: any): U[];
-    /**
-     * Returns the elements of an array that meet the condition specified in a callback function.
-     * @param callbackfn A function that accepts up to three arguments. The filter method calls the callbackfn function one time for each element in the array.
-     * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
-     */
-    filter<S extends T>(callbackfn: (value: T, index: number, array: ReadonlyArray<T>) => value is S, thisArg?: any): S[];
-    /**
-      * Returns the elements of an array that meet the condition specified in a callback function.
-      * @param callbackfn A function that accepts up to three arguments. The filter method calls the callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
-      */
-    filter(callbackfn: (value: T, index: number, array: ReadonlyArray<T>) => any, thisArg?: any): T[];
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
-      */
-    reduce(callbackfn: (previousValue: T, currentValue: T, currentIndex: number, array: ReadonlyArray<T>) => T, initialValue?: T): T;
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
-      */
-    reduce<U>(callbackfn: (previousValue: U, currentValue: T, currentIndex: number, array: ReadonlyArray<T>) => U, initialValue: U): U;
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
-      */
-    reduceRight(callbackfn: (previousValue: T, currentValue: T, currentIndex: number, array: ReadonlyArray<T>) => T, initialValue?: T): T;
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
-      */
-    reduceRight<U>(callbackfn: (previousValue: U, currentValue: T, currentIndex: number, array: ReadonlyArray<T>) => U, initialValue: U): U;
-
-    readonly [n: number]: T;
-}
-
-interface Array<T> {
-    /**
-      * Gets or sets the length of the array. This is a number one higher than the highest element defined in an array.
-      */
-    length: number;
-    /**
-      * Returns a string representation of an array.
-      */
-    toString(): string;
-    toLocaleString(): string;
-    /**
-      * Appends new elements to an array, and returns the new length of the array.
-      * @param items New elements of the Array.
-      */
-    push(...items: T[]): number;
-    /**
-      * Removes the last element from an array and returns it.
-      */
-    pop(): T | undefined;
-    /**
-      * Combines two or more arrays.
-      * @param items Additional items to add to the end of array1.
-      */
-    concat(...items: T[][]): T[];
-    /**
-      * Combines two or more arrays.
-      * @param items Additional items to add to the end of array1.
-      */
-    concat(...items: (T | T[])[]): T[];
-    /**
-      * Adds all the elements of an array separated by the specified separator string.
-      * @param separator A string used to separate one element of an array from the next in the resulting String. If omitted, the array elements are separated with a comma.
-      */
-    join(separator?: string): string;
-    /**
-      * Reverses the elements in an Array.
-      */
-    reverse(): T[];
-    /**
-      * Removes the first element from an array and returns it.
-      */
-    shift(): T | undefined;
-    /**
-      * Returns a section of an array.
-      * @param start The beginning of the specified portion of the array.
-      * @param end The end of the specified portion of the array.
-      */
-    slice(start?: number, end?: number): T[];
-    /**
-      * Sorts an array.
-      * @param compareFn The name of the function used to determine the order of the elements. If omitted, the elements are sorted in ascending, ASCII character order.
-      */
-    sort(compareFn?: (a: T, b: T) => number): this;
-    /**
-      * Removes elements from an array and, if necessary, inserts new elements in their place, returning the deleted elements.
-      * @param start The zero-based location in the array from which to start removing elements.
-      */
-    splice(start: number): T[];
-    /**
-      * Removes elements from an array and, if necessary, inserts new elements in their place, returning the deleted elements.
-      * @param start The zero-based location in the array from which to start removing elements.
-      * @param deleteCount The number of elements to remove.
-      * @param items Elements to insert into the array in place of the deleted elements.
-      */
-    splice(start: number, deleteCount: number, ...items: T[]): T[];
-    /**
-      * Inserts new elements at the start of an array.
-      * @param items  Elements to insert at the start of the Array.
-      */
-    unshift(...items: T[]): number;
-    /**
-      * Returns the index of the first occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the search starts at index 0.
-      */
-    indexOf(searchElement: T, fromIndex?: number): number;
-    /**
-      * Returns the index of the last occurrence of a specified value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the search starts at the last index in the array.
-      */
-    lastIndexOf(searchElement: T, fromIndex?: number): number;
-    /**
-      * Determines whether all the members of an array satisfy the specified test.
-      * @param callbackfn A function that accepts up to three arguments. The every method calls the callbackfn function for each element in array1 until the callbackfn returns false, or until the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
-      */
-    every(callbackfn: (value: T, index: number, array: T[]) => boolean, thisArg?: any): boolean;
-    /**
-      * Determines whether the specified callback function returns true for any element of an array.
-      * @param callbackfn A function that accepts up to three arguments. The some method calls the callbackfn function for each element in array1 until the callbackfn returns true, or until the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
-      */
-    some(callbackfn: (value: T, index: number, array: T[]) => boolean, thisArg?: any): boolean;
-    /**
-      * Performs the specified action for each element in an array.
-      * @param callbackfn  A function that accepts up to three arguments. forEach calls the callbackfn function one time for each element in the array.
-      * @param thisArg  An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
-      */
-    forEach(callbackfn: (value: T, index: number, array: T[]) => void, thisArg?: any): void;
-    /**
-      * Calls a defined callback function on each element of an array, and returns an array that contains the results.
-      * @param callbackfn A function that accepts up to three arguments. The map method calls the callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
-      */
-    map<U>(callbackfn: (value: T, index: number, array: T[]) => U, thisArg?: any): U[];
-    /**
-      * Returns the elements of an array that meet the condition specified in a callback function.
-      * @param callbackfn A function that accepts up to three arguments. The filter method calls the callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
-      */
-    filter(callbackfn: (value: T, index: number, array: T[]) => any, thisArg?: any): T[];
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
-      */
-    reduce(callbackfn: (previousValue: T, currentValue: T, currentIndex: number, array: T[]) => T, initialValue?: T): T;
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
-      */
-    reduce<U>(callbackfn: (previousValue: U, currentValue: T, currentIndex: number, array: T[]) => U, initialValue: U): U;
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
-      */
-    reduceRight(callbackfn: (previousValue: T, currentValue: T, currentIndex: number, array: T[]) => T, initialValue?: T): T;
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
-      */
-    reduceRight<U>(callbackfn: (previousValue: U, currentValue: T, currentIndex: number, array: T[]) => U, initialValue: U): U;
-
-    [n: number]: T;
-}
-
-interface ArrayConstructor {
-    new (arrayLength?: number): any[];
-    new <T>(arrayLength: number): T[];
-    new <T>(...items: T[]): T[];
-    (arrayLength?: number): any[];
-    <T>(arrayLength: number): T[];
-    <T>(...items: T[]): T[];
-    isArray(arg: any): arg is Array<any>;
-    readonly prototype: Array<any>;
-}
-
-declare const Array: ArrayConstructor;
-
-interface TypedPropertyDescriptor<T> {
-    enumerable?: boolean;
-    configurable?: boolean;
-    writable?: boolean;
-    value?: T;
-    get?: () => T;
-    set?: (value: T) => void;
-}
-
-declare type ClassDecorator = <TFunction extends Function>(target: TFunction) => TFunction | void;
-declare type PropertyDecorator = (target: Object, propertyKey: string | symbol) => void;
-declare type MethodDecorator = <T>(target: Object, propertyKey: string | symbol, descriptor: TypedPropertyDescriptor<T>) => TypedPropertyDescriptor<T> | void;
-declare type ParameterDecorator = (target: Object, propertyKey: string | symbol, parameterIndex: number) => void;
-
-declare type PromiseConstructorLike = new <T>(executor: (resolve: (value?: T | PromiseLike<T>) => void, reject: (reason?: any) => void) => void) => PromiseLike<T>;
-
-interface PromiseLike<T> {
-    /**
-     * Attaches callbacks for the resolution and/or rejection of the Promise.
-     * @param onfulfilled The callback to execute when the Promise is resolved.
-     * @param onrejected The callback to execute when the Promise is rejected.
-     * @returns A Promise for the completion of which ever callback is executed.
-     */
-    then(
-        onfulfilled?: ((value: T) => T | PromiseLike<T>) | undefined | null,
-        onrejected?: ((reason: any) => T | PromiseLike<T>) | undefined | null): PromiseLike<T>;
-
-    /**
-     * Attaches callbacks for the resolution and/or rejection of the Promise.
-     * @param onfulfilled The callback to execute when the Promise is resolved.
-     * @param onrejected The callback to execute when the Promise is rejected.
-     * @returns A Promise for the completion of which ever callback is executed.
-     */
-    then<TResult>(
-        onfulfilled: ((value: T) => T | PromiseLike<T>) | undefined | null,
-        onrejected: (reason: any) => TResult | PromiseLike<TResult>): PromiseLike<T | TResult>;
-
-    /**
-     * Attaches callbacks for the resolution and/or rejection of the Promise.
-     * @param onfulfilled The callback to execute when the Promise is resolved.
-     * @param onrejected The callback to execute when the Promise is rejected.
-     * @returns A Promise for the completion of which ever callback is executed.
-     */
-    then<TResult>(
-        onfulfilled: (value: T) => TResult | PromiseLike<TResult>,
-        onrejected?: ((reason: any) => TResult | PromiseLike<TResult>) | undefined | null): PromiseLike<TResult>;
-
-    /**
-     * Attaches callbacks for the resolution and/or rejection of the Promise.
-     * @param onfulfilled The callback to execute when the Promise is resolved.
-     * @param onrejected The callback to execute when the Promise is rejected.
-     * @returns A Promise for the completion of which ever callback is executed.
-     */
-    then<TResult1, TResult2>(
-        onfulfilled: (value: T) => TResult1 | PromiseLike<TResult1>,
-        onrejected: (reason: any) => TResult2 | PromiseLike<TResult2>): PromiseLike<TResult1 | TResult2>;
-}
-
-interface ArrayLike<T> {
-    readonly length: number;
-    readonly [n: number]: T;
-}
-
-/**
-  * Represents a raw buffer of binary data, which is used to store data for the
-  * different typed arrays. ArrayBuffers cannot be read from or written to directly,
-  * but can be passed to a typed array or DataView Object to interpret the raw
-  * buffer as needed.
-  */
-interface ArrayBuffer {
-    /**
-      * Read-only. The length of the ArrayBuffer (in bytes).
-      */
-    readonly byteLength: number;
-
-    /**
-      * Returns a section of an ArrayBuffer.
-      */
-    slice(begin:number, end?:number): ArrayBuffer;
-}
-
-interface ArrayBufferConstructor {
-    readonly prototype: ArrayBuffer;
-    new (byteLength: number): ArrayBuffer;
-    isView(arg: any): arg is ArrayBufferView;
-}
-declare const ArrayBuffer: ArrayBufferConstructor;
-
-interface ArrayBufferView {
-    /**
-      * The ArrayBuffer instance referenced by the array.
-      */
-    buffer: ArrayBuffer;
-
-    /**
-      * The length in bytes of the array.
-      */
-    byteLength: number;
-
-    /**
-      * The offset in bytes of the array.
-      */
-    byteOffset: number;
-}
-
-interface DataView {
-    readonly buffer: ArrayBuffer;
-    readonly byteLength: number;
-    readonly byteOffset: number;
-    /**
-      * Gets the Float32 value at the specified byte offset from the start of the view. There is
-      * no alignment constraint; multi-byte values may be fetched from any offset.
-      * @param byteOffset The place in the buffer at which the value should be retrieved.
-      */
-    getFloat32(byteOffset: number, littleEndian?: boolean): number;
-
-    /**
-      * Gets the Float64 value at the specified byte offset from the start of the view. There is
-      * no alignment constraint; multi-byte values may be fetched from any offset.
-      * @param byteOffset The place in the buffer at which the value should be retrieved.
-      */
-    getFloat64(byteOffset: number, littleEndian?: boolean): number;
-
-    /**
-      * Gets the Int8 value at the specified byte offset from the start of the view. There is
-      * no alignment constraint; multi-byte values may be fetched from any offset.
-      * @param byteOffset The place in the buffer at which the value should be retrieved.
-      */
-    getInt8(byteOffset: number): number;
-
-    /**
-      * Gets the Int16 value at the specified byte offset from the start of the view. There is
-      * no alignment constraint; multi-byte values may be fetched from any offset.
-      * @param byteOffset The place in the buffer at which the value should be retrieved.
-      */
-    getInt16(byteOffset: number, littleEndian?: boolean): number;
-    /**
-      * Gets the Int32 value at the specified byte offset from the start of the view. There is
-      * no alignment constraint; multi-byte values may be fetched from any offset.
-      * @param byteOffset The place in the buffer at which the value should be retrieved.
-      */
-    getInt32(byteOffset: number, littleEndian?: boolean): number;
-
-    /**
-      * Gets the Uint8 value at the specified byte offset from the start of the view. There is
-      * no alignment constraint; multi-byte values may be fetched from any offset.
-      * @param byteOffset The place in the buffer at which the value should be retrieved.
-      */
-    getUint8(byteOffset: number): number;
-
-    /**
-      * Gets the Uint16 value at the specified byte offset from the start of the view. There is
-      * no alignment constraint; multi-byte values may be fetched from any offset.
-      * @param byteOffset The place in the buffer at which the value should be retrieved.
-      */
-    getUint16(byteOffset: number, littleEndian?: boolean): number;
-
-    /**
-      * Gets the Uint32 value at the specified byte offset from the start of the view. There is
-      * no alignment constraint; multi-byte values may be fetched from any offset.
-      * @param byteOffset The place in the buffer at which the value should be retrieved.
-      */
-    getUint32(byteOffset: number, littleEndian?: boolean): number;
-
-    /**
-      * Stores an Float32 value at the specified byte offset from the start of the view.
-      * @param byteOffset The place in the buffer at which the value should be set.
-      * @param value The value to set.
-      * @param littleEndian If false or undefined, a big-endian value should be written,
-      * otherwise a little-endian value should be written.
-      */
-    setFloat32(byteOffset: number, value: number, littleEndian?: boolean): void;
-
-    /**
-      * Stores an Float64 value at the specified byte offset from the start of the view.
-      * @param byteOffset The place in the buffer at which the value should be set.
-      * @param value The value to set.
-      * @param littleEndian If false or undefined, a big-endian value should be written,
-      * otherwise a little-endian value should be written.
-      */
-    setFloat64(byteOffset: number, value: number, littleEndian?: boolean): void;
-
-    /**
-      * Stores an Int8 value at the specified byte offset from the start of the view.
-      * @param byteOffset The place in the buffer at which the value should be set.
-      * @param value The value to set.
-      */
-    setInt8(byteOffset: number, value: number): void;
-
-    /**
-      * Stores an Int16 value at the specified byte offset from the start of the view.
-      * @param byteOffset The place in the buffer at which the value should be set.
-      * @param value The value to set.
-      * @param littleEndian If false or undefined, a big-endian value should be written,
-      * otherwise a little-endian value should be written.
-      */
-    setInt16(byteOffset: number, value: number, littleEndian?: boolean): void;
-
-    /**
-      * Stores an Int32 value at the specified byte offset from the start of the view.
-      * @param byteOffset The place in the buffer at which the value should be set.
-      * @param value The value to set.
-      * @param littleEndian If false or undefined, a big-endian value should be written,
-      * otherwise a little-endian value should be written.
-      */
-    setInt32(byteOffset: number, value: number, littleEndian?: boolean): void;
-
-    /**
-      * Stores an Uint8 value at the specified byte offset from the start of the view.
-      * @param byteOffset The place in the buffer at which the value should be set.
-      * @param value The value to set.
-      */
-    setUint8(byteOffset: number, value: number): void;
-
-    /**
-      * Stores an Uint16 value at the specified byte offset from the start of the view.
-      * @param byteOffset The place in the buffer at which the value should be set.
-      * @param value The value to set.
-      * @param littleEndian If false or undefined, a big-endian value should be written,
-      * otherwise a little-endian value should be written.
-      */
-    setUint16(byteOffset: number, value: number, littleEndian?: boolean): void;
-
-    /**
-      * Stores an Uint32 value at the specified byte offset from the start of the view.
-      * @param byteOffset The place in the buffer at which the value should be set.
-      * @param value The value to set.
-      * @param littleEndian If false or undefined, a big-endian value should be written,
-      * otherwise a little-endian value should be written.
-      */
-    setUint32(byteOffset: number, value: number, littleEndian?: boolean): void;
-}
-
-interface DataViewConstructor {
-    new (buffer: ArrayBuffer, byteOffset?: number, byteLength?: number): DataView;
-}
-declare const DataView: DataViewConstructor;
-
-/**
-  * A typed array of 8-bit integer values. The contents are initialized to 0. If the requested
-  * number of bytes could not be allocated an exception is raised.
-  */
-interface Int8Array {
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * The ArrayBuffer instance referenced by the array.
-      */
-    readonly buffer: ArrayBuffer;
-
-    /**
-      * The length in bytes of the array.
-      */
-    readonly byteLength: number;
-
-    /**
-      * The offset in bytes of the array.
-      */
-    readonly byteOffset: number;
-
-    /**
-      * Returns the this object after copying a section of the array identified by start and end
-      * to the same array starting at position target
-      * @param target If target is negative, it is treated as length+target where length is the
-      * length of the array.
-      * @param start If start is negative, it is treated as length+start. If end is negative, it
-      * is treated as length+end.
-      * @param end If not specified, length of the this object is used as its default value.
-      */
-    copyWithin(target: number, start: number, end?: number): this;
-
-    /**
-      * Determines whether all the members of an array satisfy the specified test.
-      * @param callbackfn A function that accepts up to three arguments. The every method calls
-      * the callbackfn function for each element in array1 until the callbackfn returns false,
-      * or until the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    every(callbackfn: (value: number, index: number, array: Int8Array) => boolean, thisArg?: any): boolean;
-
-    /**
-        * Returns the this object after filling the section identified by start and end with value
-        * @param value value to fill array section with
-        * @param start index to start filling the array at. If start is negative, it is treated as
-        * length+start where length is the length of the array.
-        * @param end index to stop filling the array at. If end is negative, it is treated as
-        * length+end.
-        */
-    fill(value: number, start?: number, end?: number): this;
-
-    /**
-      * Returns the elements of an array that meet the condition specified in a callback function.
-      * @param callbackfn A function that accepts up to three arguments. The filter method calls
-      * the callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    filter(callbackfn: (value: number, index: number, array: Int8Array) => any, thisArg?: any): Int8Array;
-
-    /**
-      * Returns the value of the first element in the array where predicate is true, and undefined
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found, find
-      * immediately returns that element value. Otherwise, find returns undefined.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
-
-    /**
-      * Returns the index of the first element in the array where predicate is true, and -1
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found,
-      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
-
-    /**
-      * Performs the specified action for each element in an array.
-      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    forEach(callbackfn: (value: number, index: number, array: Int8Array) => void, thisArg?: any): void;
-
-    /**
-      * Returns the index of the first occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      *  search starts at index 0.
-      */
-    indexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * Adds all the elements of an array separated by the specified separator string.
-      * @param separator A string used to separate one element of an array from the next in the
-      * resulting String. If omitted, the array elements are separated with a comma.
-      */
-    join(separator?: string): string;
-
-    /**
-      * Returns the index of the last occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      * search starts at index 0.
-      */
-    lastIndexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * The length of the array.
-      */
-    readonly length: number;
-
-    /**
-      * Calls a defined callback function on each element of an array, and returns an array that
-      * contains the results.
-      * @param callbackfn A function that accepts up to three arguments. The map method calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    map(callbackfn: (value: number, index: number, array: Int8Array) => number, thisArg?: any): Int8Array;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Int8Array) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Int8Array) => U, initialValue: U): U;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an
-      * argument instead of an array value.
-      */
-    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Int8Array) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Int8Array) => U, initialValue: U): U;
-
-    /**
-      * Reverses the elements in an Array.
-      */
-    reverse(): Int8Array;
-
-    /**
-      * Sets a value or an array of values.
-      * @param index The index of the location to set.
-      * @param value The value to set.
-      */
-    set(index: number, value: number): void;
-
-    /**
-      * Sets a value or an array of values.
-      * @param array A typed or untyped array of values to set.
-      * @param offset The index in the current array at which the values are to be written.
-      */
-    set(array: ArrayLike<number>, offset?: number): void;
-
-    /**
-      * Returns a section of an array.
-      * @param start The beginning of the specified portion of the array.
-      * @param end The end of the specified portion of the array.
-      */
-    slice(start?: number, end?: number): Int8Array;
-
-    /**
-      * Determines whether the specified callback function returns true for any element of an array.
-      * @param callbackfn A function that accepts up to three arguments. The some method calls the
-      * callbackfn function for each element in array1 until the callbackfn returns true, or until
-      * the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    some(callbackfn: (value: number, index: number, array: Int8Array) => boolean, thisArg?: any): boolean;
-
-    /**
-      * Sorts an array.
-      * @param compareFn The name of the function used to determine the order of the elements. If
-      * omitted, the elements are sorted in ascending, ASCII character order.
-      */
-    sort(compareFn?: (a: number, b: number) => number): this;
-
-    /**
-      * Gets a new Int8Array view of the ArrayBuffer store for this array, referencing the elements
-      * at begin, inclusive, up to end, exclusive.
-      * @param begin The index of the beginning of the array.
-      * @param end The index of the end of the array.
-      */
-    subarray(begin: number, end?: number): Int8Array;
-
-    /**
-      * Converts a number to a string by using the current locale.
-      */
-    toLocaleString(): string;
-
-    /**
-      * Returns a string representation of an array.
-      */
-    toString(): string;
-
-    [index: number]: number;
-}
-interface Int8ArrayConstructor {
-    readonly prototype: Int8Array;
-    new (length: number): Int8Array;
-    new (array: ArrayLike<number>): Int8Array;
-    new (buffer: ArrayBuffer, byteOffset?: number, length?: number): Int8Array;
-
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * Returns a new array from a set of elements.
-      * @param items A set of elements to include in the new array object.
-      */
-    of(...items: number[]): Int8Array;
-
-    /**
-      * Creates an array from an array-like or iterable object.
-      * @param arrayLike An array-like or iterable object to convert to an array.
-      * @param mapfn A mapping function to call on every element of the array.
-      * @param thisArg Value of 'this' used to invoke the mapfn.
-      */
-    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Int8Array;
-
-}
-declare const Int8Array: Int8ArrayConstructor;
-
-/**
-  * A typed array of 8-bit unsigned integer values. The contents are initialized to 0. If the
-  * requested number of bytes could not be allocated an exception is raised.
-  */
-interface Uint8Array {
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * The ArrayBuffer instance referenced by the array.
-      */
-    readonly buffer: ArrayBuffer;
-
-    /**
-      * The length in bytes of the array.
-      */
-    readonly byteLength: number;
-
-    /**
-      * The offset in bytes of the array.
-      */
-    readonly byteOffset: number;
-
-    /**
-      * Returns the this object after copying a section of the array identified by start and end
-      * to the same array starting at position target
-      * @param target If target is negative, it is treated as length+target where length is the
-      * length of the array.
-      * @param start If start is negative, it is treated as length+start. If end is negative, it
-      * is treated as length+end.
-      * @param end If not specified, length of the this object is used as its default value.
-      */
-    copyWithin(target: number, start: number, end?: number): this;
-
-    /**
-      * Determines whether all the members of an array satisfy the specified test.
-      * @param callbackfn A function that accepts up to three arguments. The every method calls
-      * the callbackfn function for each element in array1 until the callbackfn returns false,
-      * or until the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    every(callbackfn: (value: number, index: number, array: Uint8Array) => boolean, thisArg?: any): boolean;
-
-    /**
-        * Returns the this object after filling the section identified by start and end with value
-        * @param value value to fill array section with
-        * @param start index to start filling the array at. If start is negative, it is treated as
-        * length+start where length is the length of the array.
-        * @param end index to stop filling the array at. If end is negative, it is treated as
-        * length+end.
-        */
-    fill(value: number, start?: number, end?: number): this;
-
-    /**
-      * Returns the elements of an array that meet the condition specified in a callback function.
-      * @param callbackfn A function that accepts up to three arguments. The filter method calls
-      * the callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    filter(callbackfn: (value: number, index: number, array: Uint8Array) => any, thisArg?: any): Uint8Array;
-
-    /**
-      * Returns the value of the first element in the array where predicate is true, and undefined
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found, find
-      * immediately returns that element value. Otherwise, find returns undefined.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
-
-    /**
-      * Returns the index of the first element in the array where predicate is true, and -1
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found,
-      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
-
-    /**
-      * Performs the specified action for each element in an array.
-      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    forEach(callbackfn: (value: number, index: number, array: Uint8Array) => void, thisArg?: any): void;
-
-    /**
-      * Returns the index of the first occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      *  search starts at index 0.
-      */
-    indexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * Adds all the elements of an array separated by the specified separator string.
-      * @param separator A string used to separate one element of an array from the next in the
-      * resulting String. If omitted, the array elements are separated with a comma.
-      */
-    join(separator?: string): string;
-
-    /**
-      * Returns the index of the last occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      * search starts at index 0.
-      */
-    lastIndexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * The length of the array.
-      */
-    readonly length: number;
-
-    /**
-      * Calls a defined callback function on each element of an array, and returns an array that
-      * contains the results.
-      * @param callbackfn A function that accepts up to three arguments. The map method calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    map(callbackfn: (value: number, index: number, array: Uint8Array) => number, thisArg?: any): Uint8Array;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Uint8Array) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Uint8Array) => U, initialValue: U): U;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an
-      * argument instead of an array value.
-      */
-    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Uint8Array) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Uint8Array) => U, initialValue: U): U;
-
-    /**
-      * Reverses the elements in an Array.
-      */
-    reverse(): Uint8Array;
-
-    /**
-      * Sets a value or an array of values.
-      * @param index The index of the location to set.
-      * @param value The value to set.
-      */
-    set(index: number, value: number): void;
-
-    /**
-      * Sets a value or an array of values.
-      * @param array A typed or untyped array of values to set.
-      * @param offset The index in the current array at which the values are to be written.
-      */
-    set(array: ArrayLike<number>, offset?: number): void;
-
-    /**
-      * Returns a section of an array.
-      * @param start The beginning of the specified portion of the array.
-      * @param end The end of the specified portion of the array.
-      */
-    slice(start?: number, end?: number): Uint8Array;
-
-    /**
-      * Determines whether the specified callback function returns true for any element of an array.
-      * @param callbackfn A function that accepts up to three arguments. The some method calls the
-      * callbackfn function for each element in array1 until the callbackfn returns true, or until
-      * the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    some(callbackfn: (value: number, index: number, array: Uint8Array) => boolean, thisArg?: any): boolean;
-
-    /**
-      * Sorts an array.
-      * @param compareFn The name of the function used to determine the order of the elements. If
-      * omitted, the elements are sorted in ascending, ASCII character order.
-      */
-    sort(compareFn?: (a: number, b: number) => number): this;
-
-    /**
-      * Gets a new Uint8Array view of the ArrayBuffer store for this array, referencing the elements
-      * at begin, inclusive, up to end, exclusive.
-      * @param begin The index of the beginning of the array.
-      * @param end The index of the end of the array.
-      */
-    subarray(begin: number, end?: number): Uint8Array;
-
-    /**
-      * Converts a number to a string by using the current locale.
-      */
-    toLocaleString(): string;
-
-    /**
-      * Returns a string representation of an array.
-      */
-    toString(): string;
-
-    [index: number]: number;
-}
-
-interface Uint8ArrayConstructor {
-    readonly prototype: Uint8Array;
-    new (length: number): Uint8Array;
-    new (array: ArrayLike<number>): Uint8Array;
-    new (buffer: ArrayBuffer, byteOffset?: number, length?: number): Uint8Array;
-
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * Returns a new array from a set of elements.
-      * @param items A set of elements to include in the new array object.
-      */
-    of(...items: number[]): Uint8Array;
-
-    /**
-      * Creates an array from an array-like or iterable object.
-      * @param arrayLike An array-like or iterable object to convert to an array.
-      * @param mapfn A mapping function to call on every element of the array.
-      * @param thisArg Value of 'this' used to invoke the mapfn.
-      */
-    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Uint8Array;
-
-}
-declare const Uint8Array: Uint8ArrayConstructor;
-
-/**
-  * A typed array of 8-bit unsigned integer (clamped) values. The contents are initialized to 0.
-  * If the requested number of bytes could not be allocated an exception is raised.
-  */
-interface Uint8ClampedArray {
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * The ArrayBuffer instance referenced by the array.
-      */
-    readonly buffer: ArrayBuffer;
-
-    /**
-      * The length in bytes of the array.
-      */
-    readonly byteLength: number;
-
-    /**
-      * The offset in bytes of the array.
-      */
-    readonly byteOffset: number;
-
-    /**
-      * Returns the this object after copying a section of the array identified by start and end
-      * to the same array starting at position target
-      * @param target If target is negative, it is treated as length+target where length is the
-      * length of the array.
-      * @param start If start is negative, it is treated as length+start. If end is negative, it
-      * is treated as length+end.
-      * @param end If not specified, length of the this object is used as its default value.
-      */
-    copyWithin(target: number, start: number, end?: number): this;
-
-    /**
-      * Determines whether all the members of an array satisfy the specified test.
-      * @param callbackfn A function that accepts up to three arguments. The every method calls
-      * the callbackfn function for each element in array1 until the callbackfn returns false,
-      * or until the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    every(callbackfn: (value: number, index: number, array: Uint8ClampedArray) => boolean, thisArg?: any): boolean;
-
-    /**
-        * Returns the this object after filling the section identified by start and end with value
-        * @param value value to fill array section with
-        * @param start index to start filling the array at. If start is negative, it is treated as
-        * length+start where length is the length of the array.
-        * @param end index to stop filling the array at. If end is negative, it is treated as
-        * length+end.
-        */
-    fill(value: number, start?: number, end?: number): this;
-
-    /**
-      * Returns the elements of an array that meet the condition specified in a callback function.
-      * @param callbackfn A function that accepts up to three arguments. The filter method calls
-      * the callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    filter(callbackfn: (value: number, index: number, array: Uint8ClampedArray) => any, thisArg?: any): Uint8ClampedArray;
-
-    /**
-      * Returns the value of the first element in the array where predicate is true, and undefined
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found, find
-      * immediately returns that element value. Otherwise, find returns undefined.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
-
-    /**
-      * Returns the index of the first element in the array where predicate is true, and -1
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found,
-      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
-
-    /**
-      * Performs the specified action for each element in an array.
-      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    forEach(callbackfn: (value: number, index: number, array: Uint8ClampedArray) => void, thisArg?: any): void;
-
-    /**
-      * Returns the index of the first occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      *  search starts at index 0.
-      */
-    indexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * Adds all the elements of an array separated by the specified separator string.
-      * @param separator A string used to separate one element of an array from the next in the
-      * resulting String. If omitted, the array elements are separated with a comma.
-      */
-    join(separator?: string): string;
-
-    /**
-      * Returns the index of the last occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      * search starts at index 0.
-      */
-    lastIndexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * The length of the array.
-      */
-    readonly length: number;
-
-    /**
-      * Calls a defined callback function on each element of an array, and returns an array that
-      * contains the results.
-      * @param callbackfn A function that accepts up to three arguments. The map method calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    map(callbackfn: (value: number, index: number, array: Uint8ClampedArray) => number, thisArg?: any): Uint8ClampedArray;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Uint8ClampedArray) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Uint8ClampedArray) => U, initialValue: U): U;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an
-      * argument instead of an array value.
-      */
-    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Uint8ClampedArray) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Uint8ClampedArray) => U, initialValue: U): U;
-
-    /**
-      * Reverses the elements in an Array.
-      */
-    reverse(): Uint8ClampedArray;
-
-    /**
-      * Sets a value or an array of values.
-      * @param index The index of the location to set.
-      * @param value The value to set.
-      */
-    set(index: number, value: number): void;
-
-    /**
-      * Sets a value or an array of values.
-      * @param array A typed or untyped array of values to set.
-      * @param offset The index in the current array at which the values are to be written.
-      */
-    set(array: Uint8ClampedArray, offset?: number): void;
-
-    /**
-      * Returns a section of an array.
-      * @param start The beginning of the specified portion of the array.
-      * @param end The end of the specified portion of the array.
-      */
-    slice(start?: number, end?: number): Uint8ClampedArray;
-
-    /**
-      * Determines whether the specified callback function returns true for any element of an array.
-      * @param callbackfn A function that accepts up to three arguments. The some method calls the
-      * callbackfn function for each element in array1 until the callbackfn returns true, or until
-      * the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    some(callbackfn: (value: number, index: number, array: Uint8ClampedArray) => boolean, thisArg?: any): boolean;
-
-    /**
-      * Sorts an array.
-      * @param compareFn The name of the function used to determine the order of the elements. If
-      * omitted, the elements are sorted in ascending, ASCII character order.
-      */
-    sort(compareFn?: (a: number, b: number) => number): this;
-
-    /**
-      * Gets a new Uint8ClampedArray view of the ArrayBuffer store for this array, referencing the elements
-      * at begin, inclusive, up to end, exclusive.
-      * @param begin The index of the beginning of the array.
-      * @param end The index of the end of the array.
-      */
-    subarray(begin: number, end?: number): Uint8ClampedArray;
-
-    /**
-      * Converts a number to a string by using the current locale.
-      */
-    toLocaleString(): string;
-
-    /**
-      * Returns a string representation of an array.
-      */
-    toString(): string;
-
-    [index: number]: number;
-}
-
-interface Uint8ClampedArrayConstructor {
-    readonly prototype: Uint8ClampedArray;
-    new (length: number): Uint8ClampedArray;
-    new (array: ArrayLike<number>): Uint8ClampedArray;
-    new (buffer: ArrayBuffer, byteOffset?: number, length?: number): Uint8ClampedArray;
-
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * Returns a new array from a set of elements.
-      * @param items A set of elements to include in the new array object.
-      */
-    of(...items: number[]): Uint8ClampedArray;
-
-    /**
-      * Creates an array from an array-like or iterable object.
-      * @param arrayLike An array-like or iterable object to convert to an array.
-      * @param mapfn A mapping function to call on every element of the array.
-      * @param thisArg Value of 'this' used to invoke the mapfn.
-      */
-    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Uint8ClampedArray;
-}
-declare const Uint8ClampedArray: Uint8ClampedArrayConstructor;
-
-/**
-  * A typed array of 16-bit signed integer values. The contents are initialized to 0. If the
-  * requested number of bytes could not be allocated an exception is raised.
-  */
-interface Int16Array {
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * The ArrayBuffer instance referenced by the array.
-      */
-    readonly buffer: ArrayBuffer;
-
-    /**
-      * The length in bytes of the array.
-      */
-    readonly byteLength: number;
-
-    /**
-      * The offset in bytes of the array.
-      */
-    readonly byteOffset: number;
-
-    /**
-      * Returns the this object after copying a section of the array identified by start and end
-      * to the same array starting at position target
-      * @param target If target is negative, it is treated as length+target where length is the
-      * length of the array.
-      * @param start If start is negative, it is treated as length+start. If end is negative, it
-      * is treated as length+end.
-      * @param end If not specified, length of the this object is used as its default value.
-      */
-    copyWithin(target: number, start: number, end?: number): this;
-
-    /**
-      * Determines whether all the members of an array satisfy the specified test.
-      * @param callbackfn A function that accepts up to three arguments. The every method calls
-      * the callbackfn function for each element in array1 until the callbackfn returns false,
-      * or until the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    every(callbackfn: (value: number, index: number, array: Int16Array) => boolean, thisArg?: any): boolean;
-
-    /**
-        * Returns the this object after filling the section identified by start and end with value
-        * @param value value to fill array section with
-        * @param start index to start filling the array at. If start is negative, it is treated as
-        * length+start where length is the length of the array.
-        * @param end index to stop filling the array at. If end is negative, it is treated as
-        * length+end.
-        */
-    fill(value: number, start?: number, end?: number): this;
-
-    /**
-      * Returns the elements of an array that meet the condition specified in a callback function.
-      * @param callbackfn A function that accepts up to three arguments. The filter method calls
-      * the callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    filter(callbackfn: (value: number, index: number, array: Int16Array) => any, thisArg?: any): Int16Array;
-
-    /**
-      * Returns the value of the first element in the array where predicate is true, and undefined
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found, find
-      * immediately returns that element value. Otherwise, find returns undefined.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
-
-    /**
-      * Returns the index of the first element in the array where predicate is true, and -1
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found,
-      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
-
-    /**
-      * Performs the specified action for each element in an array.
-      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    forEach(callbackfn: (value: number, index: number, array: Int16Array) => void, thisArg?: any): void;
-
-    /**
-      * Returns the index of the first occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      *  search starts at index 0.
-      */
-    indexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * Adds all the elements of an array separated by the specified separator string.
-      * @param separator A string used to separate one element of an array from the next in the
-      * resulting String. If omitted, the array elements are separated with a comma.
-      */
-    join(separator?: string): string;
-
-    /**
-      * Returns the index of the last occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      * search starts at index 0.
-      */
-    lastIndexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * The length of the array.
-      */
-    readonly length: number;
-
-    /**
-      * Calls a defined callback function on each element of an array, and returns an array that
-      * contains the results.
-      * @param callbackfn A function that accepts up to three arguments. The map method calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    map(callbackfn: (value: number, index: number, array: Int16Array) => number, thisArg?: any): Int16Array;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Int16Array) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Int16Array) => U, initialValue: U): U;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an
-      * argument instead of an array value.
-      */
-    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Int16Array) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Int16Array) => U, initialValue: U): U;
-
-    /**
-      * Reverses the elements in an Array.
-      */
-    reverse(): Int16Array;
-
-    /**
-      * Sets a value or an array of values.
-      * @param index The index of the location to set.
-      * @param value The value to set.
-      */
-    set(index: number, value: number): void;
-
-    /**
-      * Sets a value or an array of values.
-      * @param array A typed or untyped array of values to set.
-      * @param offset The index in the current array at which the values are to be written.
-      */
-    set(array: ArrayLike<number>, offset?: number): void;
-
-    /**
-      * Returns a section of an array.
-      * @param start The beginning of the specified portion of the array.
-      * @param end The end of the specified portion of the array.
-      */
-    slice(start?: number, end?: number): Int16Array;
-
-    /**
-      * Determines whether the specified callback function returns true for any element of an array.
-      * @param callbackfn A function that accepts up to three arguments. The some method calls the
-      * callbackfn function for each element in array1 until the callbackfn returns true, or until
-      * the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    some(callbackfn: (value: number, index: number, array: Int16Array) => boolean, thisArg?: any): boolean;
-
-    /**
-      * Sorts an array.
-      * @param compareFn The name of the function used to determine the order of the elements. If
-      * omitted, the elements are sorted in ascending, ASCII character order.
-      */
-    sort(compareFn?: (a: number, b: number) => number): this;
-
-    /**
-      * Gets a new Int16Array view of the ArrayBuffer store for this array, referencing the elements
-      * at begin, inclusive, up to end, exclusive.
-      * @param begin The index of the beginning of the array.
-      * @param end The index of the end of the array.
-      */
-    subarray(begin: number, end?: number): Int16Array;
-
-    /**
-      * Converts a number to a string by using the current locale.
-      */
-    toLocaleString(): string;
-
-    /**
-      * Returns a string representation of an array.
-      */
-    toString(): string;
-
-    [index: number]: number;
-}
-
-interface Int16ArrayConstructor {
-    readonly prototype: Int16Array;
-    new (length: number): Int16Array;
-    new (array: ArrayLike<number>): Int16Array;
-    new (buffer: ArrayBuffer, byteOffset?: number, length?: number): Int16Array;
-
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * Returns a new array from a set of elements.
-      * @param items A set of elements to include in the new array object.
-      */
-    of(...items: number[]): Int16Array;
-
-    /**
-      * Creates an array from an array-like or iterable object.
-      * @param arrayLike An array-like or iterable object to convert to an array.
-      * @param mapfn A mapping function to call on every element of the array.
-      * @param thisArg Value of 'this' used to invoke the mapfn.
-      */
-    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Int16Array;
-
-}
-declare const Int16Array: Int16ArrayConstructor;
-
-/**
-  * A typed array of 16-bit unsigned integer values. The contents are initialized to 0. If the
-  * requested number of bytes could not be allocated an exception is raised.
-  */
-interface Uint16Array {
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * The ArrayBuffer instance referenced by the array.
-      */
-    readonly buffer: ArrayBuffer;
-
-    /**
-      * The length in bytes of the array.
-      */
-    readonly byteLength: number;
-
-    /**
-      * The offset in bytes of the array.
-      */
-    readonly byteOffset: number;
-
-    /**
-      * Returns the this object after copying a section of the array identified by start and end
-      * to the same array starting at position target
-      * @param target If target is negative, it is treated as length+target where length is the
-      * length of the array.
-      * @param start If start is negative, it is treated as length+start. If end is negative, it
-      * is treated as length+end.
-      * @param end If not specified, length of the this object is used as its default value.
-      */
-    copyWithin(target: number, start: number, end?: number): this;
-
-    /**
-      * Determines whether all the members of an array satisfy the specified test.
-      * @param callbackfn A function that accepts up to three arguments. The every method calls
-      * the callbackfn function for each element in array1 until the callbackfn returns false,
-      * or until the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    every(callbackfn: (value: number, index: number, array: Uint16Array) => boolean, thisArg?: any): boolean;
-
-    /**
-        * Returns the this object after filling the section identified by start and end with value
-        * @param value value to fill array section with
-        * @param start index to start filling the array at. If start is negative, it is treated as
-        * length+start where length is the length of the array.
-        * @param end index to stop filling the array at. If end is negative, it is treated as
-        * length+end.
-        */
-    fill(value: number, start?: number, end?: number): this;
-
-    /**
-      * Returns the elements of an array that meet the condition specified in a callback function.
-      * @param callbackfn A function that accepts up to three arguments. The filter method calls
-      * the callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    filter(callbackfn: (value: number, index: number, array: Uint16Array) => any, thisArg?: any): Uint16Array;
-
-    /**
-      * Returns the value of the first element in the array where predicate is true, and undefined
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found, find
-      * immediately returns that element value. Otherwise, find returns undefined.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
-
-    /**
-      * Returns the index of the first element in the array where predicate is true, and -1
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found,
-      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
-
-    /**
-      * Performs the specified action for each element in an array.
-      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    forEach(callbackfn: (value: number, index: number, array: Uint16Array) => void, thisArg?: any): void;
-
-    /**
-      * Returns the index of the first occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      *  search starts at index 0.
-      */
-    indexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * Adds all the elements of an array separated by the specified separator string.
-      * @param separator A string used to separate one element of an array from the next in the
-      * resulting String. If omitted, the array elements are separated with a comma.
-      */
-    join(separator?: string): string;
-
-    /**
-      * Returns the index of the last occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      * search starts at index 0.
-      */
-    lastIndexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * The length of the array.
-      */
-    readonly length: number;
-
-    /**
-      * Calls a defined callback function on each element of an array, and returns an array that
-      * contains the results.
-      * @param callbackfn A function that accepts up to three arguments. The map method calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    map(callbackfn: (value: number, index: number, array: Uint16Array) => number, thisArg?: any): Uint16Array;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Uint16Array) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Uint16Array) => U, initialValue: U): U;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an
-      * argument instead of an array value.
-      */
-    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Uint16Array) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Uint16Array) => U, initialValue: U): U;
-
-    /**
-      * Reverses the elements in an Array.
-      */
-    reverse(): Uint16Array;
-
-    /**
-      * Sets a value or an array of values.
-      * @param index The index of the location to set.
-      * @param value The value to set.
-      */
-    set(index: number, value: number): void;
-
-    /**
-      * Sets a value or an array of values.
-      * @param array A typed or untyped array of values to set.
-      * @param offset The index in the current array at which the values are to be written.
-      */
-    set(array: ArrayLike<number>, offset?: number): void;
-
-    /**
-      * Returns a section of an array.
-      * @param start The beginning of the specified portion of the array.
-      * @param end The end of the specified portion of the array.
-      */
-    slice(start?: number, end?: number): Uint16Array;
-
-    /**
-      * Determines whether the specified callback function returns true for any element of an array.
-      * @param callbackfn A function that accepts up to three arguments. The some method calls the
-      * callbackfn function for each element in array1 until the callbackfn returns true, or until
-      * the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    some(callbackfn: (value: number, index: number, array: Uint16Array) => boolean, thisArg?: any): boolean;
-
-    /**
-      * Sorts an array.
-      * @param compareFn The name of the function used to determine the order of the elements. If
-      * omitted, the elements are sorted in ascending, ASCII character order.
-      */
-    sort(compareFn?: (a: number, b: number) => number): this;
-
-    /**
-      * Gets a new Uint16Array view of the ArrayBuffer store for this array, referencing the elements
-      * at begin, inclusive, up to end, exclusive.
-      * @param begin The index of the beginning of the array.
-      * @param end The index of the end of the array.
-      */
-    subarray(begin: number, end?: number): Uint16Array;
-
-    /**
-      * Converts a number to a string by using the current locale.
-      */
-    toLocaleString(): string;
-
-    /**
-      * Returns a string representation of an array.
-      */
-    toString(): string;
-
-    [index: number]: number;
-}
-
-interface Uint16ArrayConstructor {
-    readonly prototype: Uint16Array;
-    new (length: number): Uint16Array;
-    new (array: ArrayLike<number>): Uint16Array;
-    new (buffer: ArrayBuffer, byteOffset?: number, length?: number): Uint16Array;
-
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * Returns a new array from a set of elements.
-      * @param items A set of elements to include in the new array object.
-      */
-    of(...items: number[]): Uint16Array;
-
-    /**
-      * Creates an array from an array-like or iterable object.
-      * @param arrayLike An array-like or iterable object to convert to an array.
-      * @param mapfn A mapping function to call on every element of the array.
-      * @param thisArg Value of 'this' used to invoke the mapfn.
-      */
-    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Uint16Array;
-
-}
-declare const Uint16Array: Uint16ArrayConstructor;
-/**
-  * A typed array of 32-bit signed integer values. The contents are initialized to 0. If the
-  * requested number of bytes could not be allocated an exception is raised.
-  */
-interface Int32Array {
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * The ArrayBuffer instance referenced by the array.
-      */
-    readonly buffer: ArrayBuffer;
-
-    /**
-      * The length in bytes of the array.
-      */
-    readonly byteLength: number;
-
-    /**
-      * The offset in bytes of the array.
-      */
-    readonly byteOffset: number;
-
-    /**
-      * Returns the this object after copying a section of the array identified by start and end
-      * to the same array starting at position target
-      * @param target If target is negative, it is treated as length+target where length is the
-      * length of the array.
-      * @param start If start is negative, it is treated as length+start. If end is negative, it
-      * is treated as length+end.
-      * @param end If not specified, length of the this object is used as its default value.
-      */
-    copyWithin(target: number, start: number, end?: number): this;
-
-    /**
-      * Determines whether all the members of an array satisfy the specified test.
-      * @param callbackfn A function that accepts up to three arguments. The every method calls
-      * the callbackfn function for each element in array1 until the callbackfn returns false,
-      * or until the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    every(callbackfn: (value: number, index: number, array: Int32Array) => boolean, thisArg?: any): boolean;
-
-    /**
-        * Returns the this object after filling the section identified by start and end with value
-        * @param value value to fill array section with
-        * @param start index to start filling the array at. If start is negative, it is treated as
-        * length+start where length is the length of the array.
-        * @param end index to stop filling the array at. If end is negative, it is treated as
-        * length+end.
-        */
-    fill(value: number, start?: number, end?: number): this;
-
-    /**
-      * Returns the elements of an array that meet the condition specified in a callback function.
-      * @param callbackfn A function that accepts up to three arguments. The filter method calls
-      * the callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    filter(callbackfn: (value: number, index: number, array: Int32Array) => any, thisArg?: any): Int32Array;
-
-    /**
-      * Returns the value of the first element in the array where predicate is true, and undefined
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found, find
-      * immediately returns that element value. Otherwise, find returns undefined.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
-
-    /**
-      * Returns the index of the first element in the array where predicate is true, and -1
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found,
-      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
-
-    /**
-      * Performs the specified action for each element in an array.
-      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    forEach(callbackfn: (value: number, index: number, array: Int32Array) => void, thisArg?: any): void;
-
-    /**
-      * Returns the index of the first occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      *  search starts at index 0.
-      */
-    indexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * Adds all the elements of an array separated by the specified separator string.
-      * @param separator A string used to separate one element of an array from the next in the
-      * resulting String. If omitted, the array elements are separated with a comma.
-      */
-    join(separator?: string): string;
-
-    /**
-      * Returns the index of the last occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      * search starts at index 0.
-      */
-    lastIndexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * The length of the array.
-      */
-    readonly length: number;
-
-    /**
-      * Calls a defined callback function on each element of an array, and returns an array that
-      * contains the results.
-      * @param callbackfn A function that accepts up to three arguments. The map method calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    map(callbackfn: (value: number, index: number, array: Int32Array) => number, thisArg?: any): Int32Array;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Int32Array) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Int32Array) => U, initialValue: U): U;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an
-      * argument instead of an array value.
-      */
-    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Int32Array) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Int32Array) => U, initialValue: U): U;
-
-    /**
-      * Reverses the elements in an Array.
-      */
-    reverse(): Int32Array;
-
-    /**
-      * Sets a value or an array of values.
-      * @param index The index of the location to set.
-      * @param value The value to set.
-      */
-    set(index: number, value: number): void;
-
-    /**
-      * Sets a value or an array of values.
-      * @param array A typed or untyped array of values to set.
-      * @param offset The index in the current array at which the values are to be written.
-      */
-    set(array: ArrayLike<number>, offset?: number): void;
-
-    /**
-      * Returns a section of an array.
-      * @param start The beginning of the specified portion of the array.
-      * @param end The end of the specified portion of the array.
-      */
-    slice(start?: number, end?: number): Int32Array;
-
-    /**
-      * Determines whether the specified callback function returns true for any element of an array.
-      * @param callbackfn A function that accepts up to three arguments. The some method calls the
-      * callbackfn function for each element in array1 until the callbackfn returns true, or until
-      * the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    some(callbackfn: (value: number, index: number, array: Int32Array) => boolean, thisArg?: any): boolean;
-
-    /**
-      * Sorts an array.
-      * @param compareFn The name of the function used to determine the order of the elements. If
-      * omitted, the elements are sorted in ascending, ASCII character order.
-      */
-    sort(compareFn?: (a: number, b: number) => number): this;
-
-    /**
-      * Gets a new Int32Array view of the ArrayBuffer store for this array, referencing the elements
-      * at begin, inclusive, up to end, exclusive.
-      * @param begin The index of the beginning of the array.
-      * @param end The index of the end of the array.
-      */
-    subarray(begin: number, end?: number): Int32Array;
-
-    /**
-      * Converts a number to a string by using the current locale.
-      */
-    toLocaleString(): string;
-
-    /**
-      * Returns a string representation of an array.
-      */
-    toString(): string;
-
-    [index: number]: number;
-}
-
-interface Int32ArrayConstructor {
-    readonly prototype: Int32Array;
-    new (length: number): Int32Array;
-    new (array: ArrayLike<number>): Int32Array;
-    new (buffer: ArrayBuffer, byteOffset?: number, length?: number): Int32Array;
-
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * Returns a new array from a set of elements.
-      * @param items A set of elements to include in the new array object.
-      */
-    of(...items: number[]): Int32Array;
-
-    /**
-      * Creates an array from an array-like or iterable object.
-      * @param arrayLike An array-like or iterable object to convert to an array.
-      * @param mapfn A mapping function to call on every element of the array.
-      * @param thisArg Value of 'this' used to invoke the mapfn.
-      */
-    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Int32Array;
-}
-declare const Int32Array: Int32ArrayConstructor;
-
-/**
-  * A typed array of 32-bit unsigned integer values. The contents are initialized to 0. If the
-  * requested number of bytes could not be allocated an exception is raised.
-  */
-interface Uint32Array {
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * The ArrayBuffer instance referenced by the array.
-      */
-    readonly buffer: ArrayBuffer;
-
-    /**
-      * The length in bytes of the array.
-      */
-    readonly byteLength: number;
-
-    /**
-      * The offset in bytes of the array.
-      */
-    readonly byteOffset: number;
-
-    /**
-      * Returns the this object after copying a section of the array identified by start and end
-      * to the same array starting at position target
-      * @param target If target is negative, it is treated as length+target where length is the
-      * length of the array.
-      * @param start If start is negative, it is treated as length+start. If end is negative, it
-      * is treated as length+end.
-      * @param end If not specified, length of the this object is used as its default value.
-      */
-    copyWithin(target: number, start: number, end?: number): this;
-
-    /**
-      * Determines whether all the members of an array satisfy the specified test.
-      * @param callbackfn A function that accepts up to three arguments. The every method calls
-      * the callbackfn function for each element in array1 until the callbackfn returns false,
-      * or until the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    every(callbackfn: (value: number, index: number, array: Uint32Array) => boolean, thisArg?: any): boolean;
-
-    /**
-        * Returns the this object after filling the section identified by start and end with value
-        * @param value value to fill array section with
-        * @param start index to start filling the array at. If start is negative, it is treated as
-        * length+start where length is the length of the array.
-        * @param end index to stop filling the array at. If end is negative, it is treated as
-        * length+end.
-        */
-    fill(value: number, start?: number, end?: number): this;
-
-    /**
-      * Returns the elements of an array that meet the condition specified in a callback function.
-      * @param callbackfn A function that accepts up to three arguments. The filter method calls
-      * the callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    filter(callbackfn: (value: number, index: number, array: Uint32Array) => any, thisArg?: any): Uint32Array;
-
-    /**
-      * Returns the value of the first element in the array where predicate is true, and undefined
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found, find
-      * immediately returns that element value. Otherwise, find returns undefined.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
-
-    /**
-      * Returns the index of the first element in the array where predicate is true, and -1
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found,
-      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
-
-    /**
-      * Performs the specified action for each element in an array.
-      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    forEach(callbackfn: (value: number, index: number, array: Uint32Array) => void, thisArg?: any): void;
-
-    /**
-      * Returns the index of the first occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      *  search starts at index 0.
-      */
-    indexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * Adds all the elements of an array separated by the specified separator string.
-      * @param separator A string used to separate one element of an array from the next in the
-      * resulting String. If omitted, the array elements are separated with a comma.
-      */
-    join(separator?: string): string;
-
-    /**
-      * Returns the index of the last occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      * search starts at index 0.
-      */
-    lastIndexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * The length of the array.
-      */
-    readonly length: number;
-
-    /**
-      * Calls a defined callback function on each element of an array, and returns an array that
-      * contains the results.
-      * @param callbackfn A function that accepts up to three arguments. The map method calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    map(callbackfn: (value: number, index: number, array: Uint32Array) => number, thisArg?: any): Uint32Array;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Uint32Array) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Uint32Array) => U, initialValue: U): U;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an
-      * argument instead of an array value.
-      */
-    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Uint32Array) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Uint32Array) => U, initialValue: U): U;
-
-    /**
-      * Reverses the elements in an Array.
-      */
-    reverse(): Uint32Array;
-
-    /**
-      * Sets a value or an array of values.
-      * @param index The index of the location to set.
-      * @param value The value to set.
-      */
-    set(index: number, value: number): void;
-
-    /**
-      * Sets a value or an array of values.
-      * @param array A typed or untyped array of values to set.
-      * @param offset The index in the current array at which the values are to be written.
-      */
-    set(array: ArrayLike<number>, offset?: number): void;
-
-    /**
-      * Returns a section of an array.
-      * @param start The beginning of the specified portion of the array.
-      * @param end The end of the specified portion of the array.
-      */
-    slice(start?: number, end?: number): Uint32Array;
-
-    /**
-      * Determines whether the specified callback function returns true for any element of an array.
-      * @param callbackfn A function that accepts up to three arguments. The some method calls the
-      * callbackfn function for each element in array1 until the callbackfn returns true, or until
-      * the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    some(callbackfn: (value: number, index: number, array: Uint32Array) => boolean, thisArg?: any): boolean;
-
-    /**
-      * Sorts an array.
-      * @param compareFn The name of the function used to determine the order of the elements. If
-      * omitted, the elements are sorted in ascending, ASCII character order.
-      */
-    sort(compareFn?: (a: number, b: number) => number): this;
-
-    /**
-      * Gets a new Uint32Array view of the ArrayBuffer store for this array, referencing the elements
-      * at begin, inclusive, up to end, exclusive.
-      * @param begin The index of the beginning of the array.
-      * @param end The index of the end of the array.
-      */
-    subarray(begin: number, end?: number): Uint32Array;
-
-    /**
-      * Converts a number to a string by using the current locale.
-      */
-    toLocaleString(): string;
-
-    /**
-      * Returns a string representation of an array.
-      */
-    toString(): string;
-
-    [index: number]: number;
-}
-
-interface Uint32ArrayConstructor {
-    readonly prototype: Uint32Array;
-    new (length: number): Uint32Array;
-    new (array: ArrayLike<number>): Uint32Array;
-    new (buffer: ArrayBuffer, byteOffset?: number, length?: number): Uint32Array;
-
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * Returns a new array from a set of elements.
-      * @param items A set of elements to include in the new array object.
-      */
-    of(...items: number[]): Uint32Array;
-
-    /**
-      * Creates an array from an array-like or iterable object.
-      * @param arrayLike An array-like or iterable object to convert to an array.
-      * @param mapfn A mapping function to call on every element of the array.
-      * @param thisArg Value of 'this' used to invoke the mapfn.
-      */
-    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Uint32Array;
-}
-declare const Uint32Array: Uint32ArrayConstructor;
-
-/**
-  * A typed array of 32-bit float values. The contents are initialized to 0. If the requested number
-  * of bytes could not be allocated an exception is raised.
-  */
-interface Float32Array {
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * The ArrayBuffer instance referenced by the array.
-      */
-    readonly buffer: ArrayBuffer;
-
-    /**
-      * The length in bytes of the array.
-      */
-    readonly byteLength: number;
-
-    /**
-      * The offset in bytes of the array.
-      */
-    readonly byteOffset: number;
-
-    /**
-      * Returns the this object after copying a section of the array identified by start and end
-      * to the same array starting at position target
-      * @param target If target is negative, it is treated as length+target where length is the
-      * length of the array.
-      * @param start If start is negative, it is treated as length+start. If end is negative, it
-      * is treated as length+end.
-      * @param end If not specified, length of the this object is used as its default value.
-      */
-    copyWithin(target: number, start: number, end?: number): this;
-
-    /**
-      * Determines whether all the members of an array satisfy the specified test.
-      * @param callbackfn A function that accepts up to three arguments. The every method calls
-      * the callbackfn function for each element in array1 until the callbackfn returns false,
-      * or until the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    every(callbackfn: (value: number, index: number, array: Float32Array) => boolean, thisArg?: any): boolean;
-
-    /**
-        * Returns the this object after filling the section identified by start and end with value
-        * @param value value to fill array section with
-        * @param start index to start filling the array at. If start is negative, it is treated as
-        * length+start where length is the length of the array.
-        * @param end index to stop filling the array at. If end is negative, it is treated as
-        * length+end.
-        */
-    fill(value: number, start?: number, end?: number): this;
-
-    /**
-      * Returns the elements of an array that meet the condition specified in a callback function.
-      * @param callbackfn A function that accepts up to three arguments. The filter method calls
-      * the callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    filter(callbackfn: (value: number, index: number, array: Float32Array) => any, thisArg?: any): Float32Array;
-
-    /**
-      * Returns the value of the first element in the array where predicate is true, and undefined
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found, find
-      * immediately returns that element value. Otherwise, find returns undefined.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
-
-    /**
-      * Returns the index of the first element in the array where predicate is true, and -1
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found,
-      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
-
-    /**
-      * Performs the specified action for each element in an array.
-      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    forEach(callbackfn: (value: number, index: number, array: Float32Array) => void, thisArg?: any): void;
-
-    /**
-      * Returns the index of the first occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      *  search starts at index 0.
-      */
-    indexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * Adds all the elements of an array separated by the specified separator string.
-      * @param separator A string used to separate one element of an array from the next in the
-      * resulting String. If omitted, the array elements are separated with a comma.
-      */
-    join(separator?: string): string;
-
-    /**
-      * Returns the index of the last occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      * search starts at index 0.
-      */
-    lastIndexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * The length of the array.
-      */
-    readonly length: number;
-
-    /**
-      * Calls a defined callback function on each element of an array, and returns an array that
-      * contains the results.
-      * @param callbackfn A function that accepts up to three arguments. The map method calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    map(callbackfn: (value: number, index: number, array: Float32Array) => number, thisArg?: any): Float32Array;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Float32Array) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Float32Array) => U, initialValue: U): U;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an
-      * argument instead of an array value.
-      */
-    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Float32Array) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Float32Array) => U, initialValue: U): U;
-
-    /**
-      * Reverses the elements in an Array.
-      */
-    reverse(): Float32Array;
-
-    /**
-      * Sets a value or an array of values.
-      * @param index The index of the location to set.
-      * @param value The value to set.
-      */
-    set(index: number, value: number): void;
-
-    /**
-      * Sets a value or an array of values.
-      * @param array A typed or untyped array of values to set.
-      * @param offset The index in the current array at which the values are to be written.
-      */
-    set(array: ArrayLike<number>, offset?: number): void;
-
-    /**
-      * Returns a section of an array.
-      * @param start The beginning of the specified portion of the array.
-      * @param end The end of the specified portion of the array.
-      */
-    slice(start?: number, end?: number): Float32Array;
-
-    /**
-      * Determines whether the specified callback function returns true for any element of an array.
-      * @param callbackfn A function that accepts up to three arguments. The some method calls the
-      * callbackfn function for each element in array1 until the callbackfn returns true, or until
-      * the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    some(callbackfn: (value: number, index: number, array: Float32Array) => boolean, thisArg?: any): boolean;
-
-    /**
-      * Sorts an array.
-      * @param compareFn The name of the function used to determine the order of the elements. If
-      * omitted, the elements are sorted in ascending, ASCII character order.
-      */
-    sort(compareFn?: (a: number, b: number) => number): this;
-
-    /**
-      * Gets a new Float32Array view of the ArrayBuffer store for this array, referencing the elements
-      * at begin, inclusive, up to end, exclusive.
-      * @param begin The index of the beginning of the array.
-      * @param end The index of the end of the array.
-      */
-    subarray(begin: number, end?: number): Float32Array;
-
-    /**
-      * Converts a number to a string by using the current locale.
-      */
-    toLocaleString(): string;
-
-    /**
-      * Returns a string representation of an array.
-      */
-    toString(): string;
-
-    [index: number]: number;
-}
-
-interface Float32ArrayConstructor {
-    readonly prototype: Float32Array;
-    new (length: number): Float32Array;
-    new (array: ArrayLike<number>): Float32Array;
-    new (buffer: ArrayBuffer, byteOffset?: number, length?: number): Float32Array;
-
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * Returns a new array from a set of elements.
-      * @param items A set of elements to include in the new array object.
-      */
-    of(...items: number[]): Float32Array;
-
-    /**
-      * Creates an array from an array-like or iterable object.
-      * @param arrayLike An array-like or iterable object to convert to an array.
-      * @param mapfn A mapping function to call on every element of the array.
-      * @param thisArg Value of 'this' used to invoke the mapfn.
-      */
-    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Float32Array;
-
-}
-declare const Float32Array: Float32ArrayConstructor;
-
-/**
-  * A typed array of 64-bit float values. The contents are initialized to 0. If the requested
-  * number of bytes could not be allocated an exception is raised.
-  */
-interface Float64Array {
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * The ArrayBuffer instance referenced by the array.
-      */
-    readonly buffer: ArrayBuffer;
-
-    /**
-      * The length in bytes of the array.
-      */
-    readonly byteLength: number;
-
-    /**
-      * The offset in bytes of the array.
-      */
-    readonly byteOffset: number;
-
-    /**
-      * Returns the this object after copying a section of the array identified by start and end
-      * to the same array starting at position target
-      * @param target If target is negative, it is treated as length+target where length is the
-      * length of the array.
-      * @param start If start is negative, it is treated as length+start. If end is negative, it
-      * is treated as length+end.
-      * @param end If not specified, length of the this object is used as its default value.
-      */
-    copyWithin(target: number, start: number, end?: number): this;
-
-    /**
-      * Determines whether all the members of an array satisfy the specified test.
-      * @param callbackfn A function that accepts up to three arguments. The every method calls
-      * the callbackfn function for each element in array1 until the callbackfn returns false,
-      * or until the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    every(callbackfn: (value: number, index: number, array: Float64Array) => boolean, thisArg?: any): boolean;
-
-    /**
-        * Returns the this object after filling the section identified by start and end with value
-        * @param value value to fill array section with
-        * @param start index to start filling the array at. If start is negative, it is treated as
-        * length+start where length is the length of the array.
-        * @param end index to stop filling the array at. If end is negative, it is treated as
-        * length+end.
-        */
-    fill(value: number, start?: number, end?: number): this;
-
-    /**
-      * Returns the elements of an array that meet the condition specified in a callback function.
-      * @param callbackfn A function that accepts up to three arguments. The filter method calls
-      * the callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    filter(callbackfn: (value: number, index: number, array: Float64Array) => any, thisArg?: any): Float64Array;
-
-    /**
-      * Returns the value of the first element in the array where predicate is true, and undefined
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found, find
-      * immediately returns that element value. Otherwise, find returns undefined.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
-
-    /**
-      * Returns the index of the first element in the array where predicate is true, and -1
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found,
-      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
-
-    /**
-      * Performs the specified action for each element in an array.
-      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    forEach(callbackfn: (value: number, index: number, array: Float64Array) => void, thisArg?: any): void;
-
-    /**
-      * Returns the index of the first occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      *  search starts at index 0.
-      */
-    indexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * Adds all the elements of an array separated by the specified separator string.
-      * @param separator A string used to separate one element of an array from the next in the
-      * resulting String. If omitted, the array elements are separated with a comma.
-      */
-    join(separator?: string): string;
-
-    /**
-      * Returns the index of the last occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      * search starts at index 0.
-      */
-    lastIndexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * The length of the array.
-      */
-    readonly length: number;
-
-    /**
-      * Calls a defined callback function on each element of an array, and returns an array that
-      * contains the results.
-      * @param callbackfn A function that accepts up to three arguments. The map method calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    map(callbackfn: (value: number, index: number, array: Float64Array) => number, thisArg?: any): Float64Array;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Float64Array) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Float64Array) => U, initialValue: U): U;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an
-      * argument instead of an array value.
-      */
-    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Float64Array) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Float64Array) => U, initialValue: U): U;
-
-    /**
-      * Reverses the elements in an Array.
-      */
-    reverse(): Float64Array;
-
-    /**
-      * Sets a value or an array of values.
-      * @param index The index of the location to set.
-      * @param value The value to set.
-      */
-    set(index: number, value: number): void;
-
-    /**
-      * Sets a value or an array of values.
-      * @param array A typed or untyped array of values to set.
-      * @param offset The index in the current array at which the values are to be written.
-      */
-    set(array: ArrayLike<number>, offset?: number): void;
-
-    /**
-      * Returns a section of an array.
-      * @param start The beginning of the specified portion of the array.
-      * @param end The end of the specified portion of the array.
-      */
-    slice(start?: number, end?: number): Float64Array;
-
-    /**
-      * Determines whether the specified callback function returns true for any element of an array.
-      * @param callbackfn A function that accepts up to three arguments. The some method calls the
-      * callbackfn function for each element in array1 until the callbackfn returns true, or until
-      * the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    some(callbackfn: (value: number, index: number, array: Float64Array) => boolean, thisArg?: any): boolean;
-
-    /**
-      * Sorts an array.
-      * @param compareFn The name of the function used to determine the order of the elements. If
-      * omitted, the elements are sorted in ascending, ASCII character order.
-      */
-    sort(compareFn?: (a: number, b: number) => number): this;
-
-    /**
-      * Gets a new Float64Array view of the ArrayBuffer store for this array, referencing the elements
-      * at begin, inclusive, up to end, exclusive.
-      * @param begin The index of the beginning of the array.
-      * @param end The index of the end of the array.
-      */
-    subarray(begin: number, end?: number): Float64Array;
-
-    /**
-      * Converts a number to a string by using the current locale.
-      */
-    toLocaleString(): string;
-
-    /**
-      * Returns a string representation of an array.
-      */
-    toString(): string;
-
-    [index: number]: number;
-}
-
-interface Float64ArrayConstructor {
-    readonly prototype: Float64Array;
-    new (length: number): Float64Array;
-    new (array: ArrayLike<number>): Float64Array;
-    new (buffer: ArrayBuffer, byteOffset?: number, length?: number): Float64Array;
-
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * Returns a new array from a set of elements.
-      * @param items A set of elements to include in the new array object.
-      */
-    of(...items: number[]): Float64Array;
-
-    /**
-      * Creates an array from an array-like or iterable object.
-      * @param arrayLike An array-like or iterable object to convert to an array.
-      * @param mapfn A mapping function to call on every element of the array.
-      * @param thisArg Value of 'this' used to invoke the mapfn.
-      */
-    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Float64Array;
-}
-declare const Float64Array: Float64ArrayConstructor;
-
-/////////////////////////////
-/// ECMAScript Internationalization API
-/////////////////////////////
-
-declare module Intl {
-    interface CollatorOptions {
-        usage?: string;
-        localeMatcher?: string;
-        numeric?: boolean;
-        caseFirst?: string;
-        sensitivity?: string;
-        ignorePunctuation?: boolean;
-    }
-
-    interface ResolvedCollatorOptions {
-        locale: string;
-        usage: string;
-        sensitivity: string;
-        ignorePunctuation: boolean;
-        collation: string;
-        caseFirst: string;
-        numeric: boolean;
-    }
-
-    interface Collator {
-        compare(x: string, y: string): number;
-        resolvedOptions(): ResolvedCollatorOptions;
-    }
-    var Collator: {
-        new (locales?: string | string[], options?: CollatorOptions): Collator;
-        (locales?: string | string[], options?: CollatorOptions): Collator;
-        supportedLocalesOf(locales: string | string[], options?: CollatorOptions): string[];
-    }
-
-    interface NumberFormatOptions {
-        localeMatcher?: string;
-        style?: string;
-        currency?: string;
-        currencyDisplay?: string;
-        useGrouping?: boolean;
-        minimumIntegerDigits?: number;
-        minimumFractionDigits?: number;
-        maximumFractionDigits?: number;
-        minimumSignificantDigits?: number;
-        maximumSignificantDigits?: number;
-    }
-
-    interface ResolvedNumberFormatOptions {
-        locale: string;
-        numberingSystem: string;
-        style: string;
-        currency?: string;
-        currencyDisplay?: string;
-        minimumIntegerDigits: number;
-        minimumFractionDigits: number;
-        maximumFractionDigits: number;
-        minimumSignificantDigits?: number;
-        maximumSignificantDigits?: number;
-        useGrouping: boolean;
-    }
-
-    interface NumberFormat {
-        format(value: number): string;
-        resolvedOptions(): ResolvedNumberFormatOptions;
-    }
-    var NumberFormat: {
-        new (locales?: string | string[], options?: NumberFormatOptions): NumberFormat;
-        (locales?: string | string[], options?: NumberFormatOptions): NumberFormat;
-        supportedLocalesOf(locales: string | string[], options?: NumberFormatOptions): string[];
-    }
-
-    interface DateTimeFormatOptions {
-        localeMatcher?: string;
-        weekday?: string;
-        era?: string;
-        year?: string;
-        month?: string;
-        day?: string;
-        hour?: string;
-        minute?: string;
-        second?: string;
-        timeZoneName?: string;
-        formatMatcher?: string;
-        hour12?: boolean;
-        timeZone?: string;
-    }
-
-    interface ResolvedDateTimeFormatOptions {
-        locale: string;
-        calendar: string;
-        numberingSystem: string;
-        timeZone: string;
-        hour12?: boolean;
-        weekday?: string;
-        era?: string;
-        year?: string;
-        month?: string;
-        day?: string;
-        hour?: string;
-        minute?: string;
-        second?: string;
-        timeZoneName?: string;
-    }
-
-    interface DateTimeFormat {
-        format(date?: Date | number): string;
-        resolvedOptions(): ResolvedDateTimeFormatOptions;
-    }
-    var DateTimeFormat: {
-        new (locales?: string | string[], options?: DateTimeFormatOptions): DateTimeFormat;
-        (locales?: string | string[], options?: DateTimeFormatOptions): DateTimeFormat;
-        supportedLocalesOf(locales: string | string[], options?: DateTimeFormatOptions): string[];
-    }
-}
-
-interface String {
-    /**
-      * Determines whether two strings are equivalent in the current or specified locale.
-      * @param that String to compare to target string
-      * @param locales A locale string or array of locale strings that contain one or more language or locale tags. If you include more than one locale string, list them in descending order of priority so that the first entry is the preferred locale. If you omit this parameter, the default locale of the JavaScript runtime is used. This parameter must conform to BCP 47 standards; see the Intl.Collator object for details.
-      * @param options An object that contains one or more properties that specify comparison options. see the Intl.Collator object for details.
-      */
-    localeCompare(that: string, locales?: string | string[], options?: Intl.CollatorOptions): number;
-}
-
-interface Number {
-    /**
-      * Converts a number to a string by using the current or specified locale.
-      * @param locales A locale string or array of locale strings that contain one or more language or locale tags. If you include more than one locale string, list them in descending order of priority so that the first entry is the preferred locale. If you omit this parameter, the default locale of the JavaScript runtime is used.
-      * @param options An object that contains one or more properties that specify comparison options.
-      */
-    toLocaleString(locales?: string | string[], options?: Intl.NumberFormatOptions): string;
-}
-
-interface Date {
-    /**
-      * Converts a date and time to a string by using the current or specified locale.
-      * @param locales A locale string or array of locale strings that contain one or more language or locale tags. If you include more than one locale string, list them in descending order of priority so that the first entry is the preferred locale. If you omit this parameter, the default locale of the JavaScript runtime is used.
-      * @param options An object that contains one or more properties that specify comparison options.
-      */
-    toLocaleString(locales?: string | string[], options?: Intl.DateTimeFormatOptions): string;
-    /**
-      * Converts a date to a string by using the current or specified locale.
-      * @param locales A locale string or array of locale strings that contain one or more language or locale tags. If you include more than one locale string, list them in descending order of priority so that the first entry is the preferred locale. If you omit this parameter, the default locale of the JavaScript runtime is used.
-      * @param options An object that contains one or more properties that specify comparison options.
-      */
-    toLocaleDateString(locales?: string | string[], options?: Intl.DateTimeFormatOptions): string;
-
-    /**
-      * Converts a time to a string by using the current or specified locale.
-      * @param locales A locale string or array of locale strings that contain one or more language or locale tags. If you include more than one locale string, list them in descending order of priority so that the first entry is the preferred locale. If you omit this parameter, the default locale of the JavaScript runtime is used.
-      * @param options An object that contains one or more properties that specify comparison options.
-      */
-    toLocaleTimeString(locales?: string | string[], options?: Intl.DateTimeFormatOptions): string;
-}
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved. 
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0  
+ 
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
+MERCHANTABLITY OR NON-INFRINGEMENT. 
+ 
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+
+
+
+/// <reference no-default-lib="true"/>
+
+
+/////////////////////////////
+/// ECMAScript APIs
+/////////////////////////////
+
+declare const NaN: number;
+declare const Infinity: number;
+
+/**
+  * Evaluates JavaScript code and executes it.
+  * @param x A String value that contains valid JavaScript code.
+  */
+declare function eval(x: string): any;
+
+/**
+  * Converts A string to an integer.
+  * @param s A string to convert into a number.
+  * @param radix A value between 2 and 36 that specifies the base of the number in numString.
+  * If this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.
+  * All other strings are considered decimal.
+  */
+declare function parseInt(s: string, radix?: number): number;
+
+/**
+  * Converts a string to a floating-point number.
+  * @param string A string that contains a floating-point number.
+  */
+declare function parseFloat(string: string): number;
+
+/**
+  * Returns a Boolean value that indicates whether a value is the reserved value NaN (not a number).
+  * @param number A numeric value.
+  */
+declare function isNaN(number: number): boolean;
+
+/**
+  * Determines whether a supplied number is finite.
+  * @param number Any numeric value.
+  */
+declare function isFinite(number: number): boolean;
+
+/**
+  * Gets the unencoded version of an encoded Uniform Resource Identifier (URI).
+  * @param encodedURI A value representing an encoded URI.
+  */
+declare function decodeURI(encodedURI: string): string;
+
+/**
+  * Gets the unencoded version of an encoded component of a Uniform Resource Identifier (URI).
+  * @param encodedURIComponent A value representing an encoded URI component.
+  */
+declare function decodeURIComponent(encodedURIComponent: string): string;
+
+/**
+  * Encodes a text string as a valid Uniform Resource Identifier (URI)
+  * @param uri A value representing an encoded URI.
+  */
+declare function encodeURI(uri: string): string;
+
+/**
+  * Encodes a text string as a valid component of a Uniform Resource Identifier (URI).
+  * @param uriComponent A value representing an encoded URI component.
+  */
+declare function encodeURIComponent(uriComponent: string): string;
+
+interface PropertyDescriptor {
+    configurable?: boolean;
+    enumerable?: boolean;
+    value?: any;
+    writable?: boolean;
+    get?(): any;
+    set?(v: any): void;
+}
+
+interface PropertyDescriptorMap {
+    [s: string]: PropertyDescriptor;
+}
+
+interface Object {
+    /** The initial value of Object.prototype.constructor is the standard built-in Object constructor. */
+    constructor: Function;
+
+    /** Returns a string representation of an object. */
+    toString(): string;
+
+    /** Returns a date converted to a string using the current locale. */
+    toLocaleString(): string;
+
+    /** Returns the primitive value of the specified object. */
+    valueOf(): Object;
+
+    /**
+      * Determines whether an object has a property with the specified name.
+      * @param v A property name.
+      */
+    hasOwnProperty(v: string): boolean;
+
+    /**
+      * Determines whether an object exists in another object's prototype chain.
+      * @param v Another object whose prototype chain is to be checked.
+      */
+    isPrototypeOf(v: Object): boolean;
+
+    /**
+      * Determines whether a specified property is enumerable.
+      * @param v A property name.
+      */
+    propertyIsEnumerable(v: string): boolean;
+}
+
+interface ObjectConstructor {
+    new(value?: any): Object;
+    (): any;
+    (value: any): any;
+
+    /** A reference to the prototype for a class of objects. */
+    readonly prototype: Object;
+
+    /**
+      * Returns the prototype of an object.
+      * @param o The object that references the prototype.
+      */
+    getPrototypeOf(o: any): any;
+
+    /**
+      * Gets the own property descriptor of the specified object.
+      * An own property descriptor is one that is defined directly on the object and is not inherited from the object's prototype.
+      * @param o Object that contains the property.
+      * @param p Name of the property.
+    */
+    getOwnPropertyDescriptor(o: any, p: string): PropertyDescriptor;
+
+    /**
+      * Returns the names of the own properties of an object. The own properties of an object are those that are defined directly
+      * on that object, and are not inherited from the object's prototype. The properties of an object include both fields (objects) and functions.
+      * @param o Object that contains the own properties.
+      */
+    getOwnPropertyNames(o: any): string[];
+
+    /**
+      * Creates an object that has the specified prototype or that has null prototype.
+      * @param o Object to use as a prototype. May be null.
+      */
+    create(o: object | null): any;
+
+    /**
+      * Creates an object that has the specified prototype, and that optionally contains specified properties.
+      * @param o Object to use as a prototype. May be null
+      * @param properties JavaScript object that contains one or more property descriptors.
+      */
+    create(o: object | null, properties: PropertyDescriptorMap & ThisType<any>): any;
+
+    /**
+      * Adds a property to an object, or modifies attributes of an existing property.
+      * @param o Object on which to add or modify the property. This can be a native JavaScript object (that is, a user-defined object or a built in object) or a DOM object.
+      * @param p The property name.
+      * @param attributes Descriptor for the property. It can be for a data property or an accessor property.
+      */
+    defineProperty(o: any, p: string, attributes: PropertyDescriptor & ThisType<any>): any;
+
+    /**
+      * Adds one or more properties to an object, and/or modifies attributes of existing properties.
+      * @param o Object on which to add or modify the properties. This can be a native JavaScript object or a DOM object.
+      * @param properties JavaScript object that contains one or more descriptor objects. Each descriptor object describes a data property or an accessor property.
+      */
+    defineProperties(o: any, properties: PropertyDescriptorMap & ThisType<any>): any;
+
+    /**
+      * Prevents the modification of attributes of existing properties, and prevents the addition of new properties.
+      * @param o Object on which to lock the attributes.
+      */
+    seal<T>(o: T): T;
+
+    /**
+      * Prevents the modification of existing property attributes and values, and prevents the addition of new properties.
+      * @param o Object on which to lock the attributes.
+      */
+    freeze<T>(a: T[]): ReadonlyArray<T>;
+
+    /**
+      * Prevents the modification of existing property attributes and values, and prevents the addition of new properties.
+      * @param o Object on which to lock the attributes.
+      */
+    freeze<T extends Function>(f: T): T;
+
+    /**
+      * Prevents the modification of existing property attributes and values, and prevents the addition of new properties.
+      * @param o Object on which to lock the attributes.
+      */
+    freeze<T>(o: T): Readonly<T>;
+
+    /**
+      * Prevents the addition of new properties to an object.
+      * @param o Object to make non-extensible.
+      */
+    preventExtensions<T>(o: T): T;
+
+    /**
+      * Returns true if existing property attributes cannot be modified in an object and new properties cannot be added to the object.
+      * @param o Object to test.
+      */
+    isSealed(o: any): boolean;
+
+    /**
+      * Returns true if existing property attributes and values cannot be modified in an object, and new properties cannot be added to the object.
+      * @param o Object to test.
+      */
+    isFrozen(o: any): boolean;
+
+    /**
+      * Returns a value that indicates whether new properties can be added to an object.
+      * @param o Object to test.
+      */
+    isExtensible(o: any): boolean;
+
+    /**
+      * Returns the names of the enumerable properties and methods of an object.
+      * @param o Object that contains the properties and methods. This can be an object that you created or an existing Document Object Model (DOM) object.
+      */
+    keys(o: any): string[];
+}
+
+/**
+  * Provides functionality common to all JavaScript objects.
+  */
+declare const Object: ObjectConstructor;
+
+/**
+  * Creates a new function.
+  */
+interface Function {
+    /**
+      * Calls the function, substituting the specified object for the this value of the function, and the specified array for the arguments of the function.
+      * @param thisArg The object to be used as the this object.
+      * @param argArray A set of arguments to be passed to the function.
+      */
+    apply(this: Function, thisArg: any, argArray?: any): any;
+
+    /**
+      * Calls a method of an object, substituting another object for the current object.
+      * @param thisArg The object to be used as the current object.
+      * @param argArray A list of arguments to be passed to the method.
+      */
+    call(this: Function, thisArg: any, ...argArray: any[]): any;
+
+    /**
+      * For a given function, creates a bound function that has the same body as the original function.
+      * The this object of the bound function is associated with the specified object, and has the specified initial parameters.
+      * @param thisArg An object to which the this keyword can refer inside the new function.
+      * @param argArray A list of arguments to be passed to the new function.
+      */
+    bind(this: Function, thisArg: any, ...argArray: any[]): any;
+
+    /** Returns a string representation of a function. */
+    toString(): string;
+
+    prototype: any;
+    readonly length: number;
+
+    // Non-standard extensions
+    arguments: any;
+    caller: Function;
+}
+
+interface FunctionConstructor {
+    /**
+      * Creates a new function.
+      * @param args A list of arguments the function accepts.
+      */
+    new(...args: string[]): Function;
+    (...args: string[]): Function;
+    readonly prototype: Function;
+}
+
+declare const Function: FunctionConstructor;
+
+interface IArguments {
+    [index: number]: any;
+    length: number;
+    callee: Function;
+}
+
+interface String {
+    /** Returns a string representation of a string. */
+    toString(): string;
+
+    /**
+      * Returns the character at the specified index.
+      * @param pos The zero-based index of the desired character.
+      */
+    charAt(pos: number): string;
+
+    /**
+      * Returns the Unicode value of the character at the specified location.
+      * @param index The zero-based index of the desired character. If there is no character at the specified index, NaN is returned.
+      */
+    charCodeAt(index: number): number;
+
+    /**
+      * Returns a string that contains the concatenation of two or more strings.
+      * @param strings The strings to append to the end of the string.
+      */
+    concat(...strings: string[]): string;
+
+    /**
+      * Returns the position of the first occurrence of a substring.
+      * @param searchString The substring to search for in the string
+      * @param position The index at which to begin searching the String object. If omitted, search starts at the beginning of the string.
+      */
+    indexOf(searchString: string, position?: number): number;
+
+    /**
+      * Returns the last occurrence of a substring in the string.
+      * @param searchString The substring to search for.
+      * @param position The index at which to begin searching. If omitted, the search begins at the end of the string.
+      */
+    lastIndexOf(searchString: string, position?: number): number;
+
+    /**
+      * Determines whether two strings are equivalent in the current locale.
+      * @param that String to compare to target string
+      */
+    localeCompare(that: string): number;
+
+    /**
+      * Matches a string with a regular expression, and returns an array containing the results of that search.
+      * @param regexp A variable name or string literal containing the regular expression pattern and flags.
+      */
+    match(regexp: string | RegExp): RegExpMatchArray | null;
+
+    /**
+      * Replaces text in a string, using a regular expression or search string.
+      * @param searchValue A string to search for.
+      * @param replaceValue A string containing the text to replace for every successful match of searchValue in this string.
+      */
+    replace(searchValue: string | RegExp, replaceValue: string): string;
+
+    /**
+      * Replaces text in a string, using a regular expression or search string.
+      * @param searchValue A string to search for.
+      * @param replacer A function that returns the replacement text.
+      */
+    replace(searchValue: string | RegExp, replacer: (substring: string, ...args: any[]) => string): string;
+
+    /**
+      * Finds the first substring match in a regular expression search.
+      * @param regexp The regular expression pattern and applicable flags.
+      */
+    search(regexp: string | RegExp): number;
+
+    /**
+      * Returns a section of a string.
+      * @param start The index to the beginning of the specified portion of stringObj.
+      * @param end The index to the end of the specified portion of stringObj. The substring includes the characters up to, but not including, the character indicated by end.
+      * If this value is not specified, the substring continues to the end of stringObj.
+      */
+    slice(start?: number, end?: number): string;
+
+    /**
+      * Split a string into substrings using the specified separator and return them as an array.
+      * @param separator A string that identifies character or characters to use in separating the string. If omitted, a single-element array containing the entire string is returned.
+      * @param limit A value used to limit the number of elements returned in the array.
+      */
+    split(separator: string | RegExp, limit?: number): string[];
+
+    /**
+      * Returns the substring at the specified location within a String object.
+      * @param start The zero-based index number indicating the beginning of the substring.
+      * @param end Zero-based index number indicating the end of the substring. The substring includes the characters up to, but not including, the character indicated by end.
+      * If end is omitted, the characters from start through the end of the original string are returned.
+      */
+    substring(start: number, end?: number): string;
+
+    /** Converts all the alphabetic characters in a string to lowercase. */
+    toLowerCase(): string;
+
+    /** Converts all alphabetic characters to lowercase, taking into account the host environment's current locale. */
+    toLocaleLowerCase(): string;
+
+    /** Converts all the alphabetic characters in a string to uppercase. */
+    toUpperCase(): string;
+
+    /** Returns a string where all alphabetic characters have been converted to uppercase, taking into account the host environment's current locale. */
+    toLocaleUpperCase(): string;
+
+    /** Removes the leading and trailing white space and line terminator characters from a string. */
+    trim(): string;
+
+    /** Returns the length of a String object. */
+    readonly length: number;
+
+    // IE extensions
+    /**
+      * Gets a substring beginning at the specified location and having the specified length.
+      * @param from The starting position of the desired substring. The index of the first character in the string is zero.
+      * @param length The number of characters to include in the returned substring.
+      */
+    substr(from: number, length?: number): string;
+
+    /** Returns the primitive value of the specified object. */
+    valueOf(): string;
+
+    readonly [index: number]: string;
+}
+
+interface StringConstructor {
+    new(value?: any): String;
+    (value?: any): string;
+    readonly prototype: String;
+    fromCharCode(...codes: number[]): string;
+}
+
+/**
+  * Allows manipulation and formatting of text strings and determination and location of substrings within strings.
+  */
+declare const String: StringConstructor;
+
+interface Boolean {
+    /** Returns the primitive value of the specified object. */
+    valueOf(): boolean;
+}
+
+interface BooleanConstructor {
+    new(value?: any): Boolean;
+    (value?: any): boolean;
+    readonly prototype: Boolean;
+}
+
+declare const Boolean: BooleanConstructor;
+
+interface Number {
+    /**
+      * Returns a string representation of an object.
+      * @param radix Specifies a radix for converting numeric values to strings. This value is only used for numbers.
+      */
+    toString(radix?: number): string;
+
+    /**
+      * Returns a string representing a number in fixed-point notation.
+      * @param fractionDigits Number of digits after the decimal point. Must be in the range 0 - 20, inclusive.
+      */
+    toFixed(fractionDigits?: number): string;
+
+    /**
+      * Returns a string containing a number represented in exponential notation.
+      * @param fractionDigits Number of digits after the decimal point. Must be in the range 0 - 20, inclusive.
+      */
+    toExponential(fractionDigits?: number): string;
+
+    /**
+      * Returns a string containing a number represented either in exponential or fixed-point notation with a specified number of digits.
+      * @param precision Number of significant digits. Must be in the range 1 - 21, inclusive.
+      */
+    toPrecision(precision?: number): string;
+
+    /** Returns the primitive value of the specified object. */
+    valueOf(): number;
+}
+
+interface NumberConstructor {
+    new(value?: any): Number;
+    (value?: any): number;
+    readonly prototype: Number;
+
+    /** The largest number that can be represented in JavaScript. Equal to approximately 1.79E+308. */
+    readonly MAX_VALUE: number;
+
+    /** The closest number to zero that can be represented in JavaScript. Equal to approximately 5.00E-324. */
+    readonly MIN_VALUE: number;
+
+    /**
+      * A value that is not a number.
+      * In equality comparisons, NaN does not equal any value, including itself. To test whether a value is equivalent to NaN, use the isNaN function.
+      */
+    readonly NaN: number;
+
+    /**
+      * A value that is less than the largest negative number that can be represented in JavaScript.
+      * JavaScript displays NEGATIVE_INFINITY values as -infinity.
+      */
+    readonly NEGATIVE_INFINITY: number;
+
+    /**
+      * A value greater than the largest number that can be represented in JavaScript.
+      * JavaScript displays POSITIVE_INFINITY values as infinity.
+      */
+    readonly POSITIVE_INFINITY: number;
+}
+
+/** An object that represents a number of any kind. All JavaScript numbers are 64-bit floating-point numbers. */
+declare const Number: NumberConstructor;
+
+interface TemplateStringsArray extends ReadonlyArray<string> {
+    readonly raw: ReadonlyArray<string>;
+}
+
+interface Math {
+    /** The mathematical constant e. This is Euler's number, the base of natural logarithms. */
+    readonly E: number;
+    /** The natural logarithm of 10. */
+    readonly LN10: number;
+    /** The natural logarithm of 2. */
+    readonly LN2: number;
+    /** The base-2 logarithm of e. */
+    readonly LOG2E: number;
+    /** The base-10 logarithm of e. */
+    readonly LOG10E: number;
+    /** Pi. This is the ratio of the circumference of a circle to its diameter. */
+    readonly PI: number;
+    /** The square root of 0.5, or, equivalently, one divided by the square root of 2. */
+    readonly SQRT1_2: number;
+    /** The square root of 2. */
+    readonly SQRT2: number;
+    /**
+      * Returns the absolute value of a number (the value without regard to whether it is positive or negative).
+      * For example, the absolute value of -5 is the same as the absolute value of 5.
+      * @param x A numeric expression for which the absolute value is needed.
+      */
+    abs(x: number): number;
+    /**
+      * Returns the arc cosine (or inverse cosine) of a number.
+      * @param x A numeric expression.
+      */
+    acos(x: number): number;
+    /**
+      * Returns the arcsine of a number.
+      * @param x A numeric expression.
+      */
+    asin(x: number): number;
+    /**
+      * Returns the arctangent of a number.
+      * @param x A numeric expression for which the arctangent is needed.
+      */
+    atan(x: number): number;
+    /**
+      * Returns the angle (in radians) from the X axis to a point.
+      * @param y A numeric expression representing the cartesian y-coordinate.
+      * @param x A numeric expression representing the cartesian x-coordinate.
+      */
+    atan2(y: number, x: number): number;
+    /**
+      * Returns the smallest number greater than or equal to its numeric argument.
+      * @param x A numeric expression.
+      */
+    ceil(x: number): number;
+    /**
+      * Returns the cosine of a number.
+      * @param x A numeric expression that contains an angle measured in radians.
+      */
+    cos(x: number): number;
+    /**
+      * Returns e (the base of natural logarithms) raised to a power.
+      * @param x A numeric expression representing the power of e.
+      */
+    exp(x: number): number;
+    /**
+      * Returns the greatest number less than or equal to its numeric argument.
+      * @param x A numeric expression.
+      */
+    floor(x: number): number;
+    /**
+      * Returns the natural logarithm (base e) of a number.
+      * @param x A numeric expression.
+      */
+    log(x: number): number;
+    /**
+      * Returns the larger of a set of supplied numeric expressions.
+      * @param values Numeric expressions to be evaluated.
+      */
+    max(...values: number[]): number;
+    /**
+      * Returns the smaller of a set of supplied numeric expressions.
+      * @param values Numeric expressions to be evaluated.
+      */
+    min(...values: number[]): number;
+    /**
+      * Returns the value of a base expression taken to a specified power.
+      * @param x The base value of the expression.
+      * @param y The exponent value of the expression.
+      */
+    pow(x: number, y: number): number;
+    /** Returns a pseudorandom number between 0 and 1. */
+    random(): number;
+    /**
+      * Returns a supplied numeric expression rounded to the nearest number.
+      * @param x The value to be rounded to the nearest number.
+      */
+    round(x: number): number;
+    /**
+      * Returns the sine of a number.
+      * @param x A numeric expression that contains an angle measured in radians.
+      */
+    sin(x: number): number;
+    /**
+      * Returns the square root of a number.
+      * @param x A numeric expression.
+      */
+    sqrt(x: number): number;
+    /**
+      * Returns the tangent of a number.
+      * @param x A numeric expression that contains an angle measured in radians.
+      */
+    tan(x: number): number;
+}
+/** An intrinsic object that provides basic mathematics functionality and constants. */
+declare const Math: Math;
+
+/** Enables basic storage and retrieval of dates and times. */
+interface Date {
+    /** Returns a string representation of a date. The format of the string depends on the locale. */
+    toString(): string;
+    /** Returns a date as a string value. */
+    toDateString(): string;
+    /** Returns a time as a string value. */
+    toTimeString(): string;
+    /** Returns a value as a string value appropriate to the host environment's current locale. */
+    toLocaleString(): string;
+    /** Returns a date as a string value appropriate to the host environment's current locale. */
+    toLocaleDateString(): string;
+    /** Returns a time as a string value appropriate to the host environment's current locale. */
+    toLocaleTimeString(): string;
+    /** Returns the stored time value in milliseconds since midnight, January 1, 1970 UTC. */
+    valueOf(): number;
+    /** Gets the time value in milliseconds. */
+    getTime(): number;
+    /** Gets the year, using local time. */
+    getFullYear(): number;
+    /** Gets the year using Universal Coordinated Time (UTC). */
+    getUTCFullYear(): number;
+    /** Gets the month, using local time. */
+    getMonth(): number;
+    /** Gets the month of a Date object using Universal Coordinated Time (UTC). */
+    getUTCMonth(): number;
+    /** Gets the day-of-the-month, using local time. */
+    getDate(): number;
+    /** Gets the day-of-the-month, using Universal Coordinated Time (UTC). */
+    getUTCDate(): number;
+    /** Gets the day of the week, using local time. */
+    getDay(): number;
+    /** Gets the day of the week using Universal Coordinated Time (UTC). */
+    getUTCDay(): number;
+    /** Gets the hours in a date, using local time. */
+    getHours(): number;
+    /** Gets the hours value in a Date object using Universal Coordinated Time (UTC). */
+    getUTCHours(): number;
+    /** Gets the minutes of a Date object, using local time. */
+    getMinutes(): number;
+    /** Gets the minutes of a Date object using Universal Coordinated Time (UTC). */
+    getUTCMinutes(): number;
+    /** Gets the seconds of a Date object, using local time. */
+    getSeconds(): number;
+    /** Gets the seconds of a Date object using Universal Coordinated Time (UTC). */
+    getUTCSeconds(): number;
+    /** Gets the milliseconds of a Date, using local time. */
+    getMilliseconds(): number;
+    /** Gets the milliseconds of a Date object using Universal Coordinated Time (UTC). */
+    getUTCMilliseconds(): number;
+    /** Gets the difference in minutes between the time on the local computer and Universal Coordinated Time (UTC). */
+    getTimezoneOffset(): number;
+    /**
+      * Sets the date and time value in the Date object.
+      * @param time A numeric value representing the number of elapsed milliseconds since midnight, January 1, 1970 GMT.
+      */
+    setTime(time: number): number;
+    /**
+      * Sets the milliseconds value in the Date object using local time.
+      * @param ms A numeric value equal to the millisecond value.
+      */
+    setMilliseconds(ms: number): number;
+    /**
+      * Sets the milliseconds value in the Date object using Universal Coordinated Time (UTC).
+      * @param ms A numeric value equal to the millisecond value.
+      */
+    setUTCMilliseconds(ms: number): number;
+
+    /**
+      * Sets the seconds value in the Date object using local time.
+      * @param sec A numeric value equal to the seconds value.
+      * @param ms A numeric value equal to the milliseconds value.
+      */
+    setSeconds(sec: number, ms?: number): number;
+    /**
+      * Sets the seconds value in the Date object using Universal Coordinated Time (UTC).
+      * @param sec A numeric value equal to the seconds value.
+      * @param ms A numeric value equal to the milliseconds value.
+      */
+    setUTCSeconds(sec: number, ms?: number): number;
+    /**
+      * Sets the minutes value in the Date object using local time.
+      * @param min A numeric value equal to the minutes value.
+      * @param sec A numeric value equal to the seconds value.
+      * @param ms A numeric value equal to the milliseconds value.
+      */
+    setMinutes(min: number, sec?: number, ms?: number): number;
+    /**
+      * Sets the minutes value in the Date object using Universal Coordinated Time (UTC).
+      * @param min A numeric value equal to the minutes value.
+      * @param sec A numeric value equal to the seconds value.
+      * @param ms A numeric value equal to the milliseconds value.
+      */
+    setUTCMinutes(min: number, sec?: number, ms?: number): number;
+    /**
+      * Sets the hour value in the Date object using local time.
+      * @param hours A numeric value equal to the hours value.
+      * @param min A numeric value equal to the minutes value.
+      * @param sec A numeric value equal to the seconds value.
+      * @param ms A numeric value equal to the milliseconds value.
+      */
+    setHours(hours: number, min?: number, sec?: number, ms?: number): number;
+    /**
+      * Sets the hours value in the Date object using Universal Coordinated Time (UTC).
+      * @param hours A numeric value equal to the hours value.
+      * @param min A numeric value equal to the minutes value.
+      * @param sec A numeric value equal to the seconds value.
+      * @param ms A numeric value equal to the milliseconds value.
+      */
+    setUTCHours(hours: number, min?: number, sec?: number, ms?: number): number;
+    /**
+      * Sets the numeric day-of-the-month value of the Date object using local time.
+      * @param date A numeric value equal to the day of the month.
+      */
+    setDate(date: number): number;
+    /**
+      * Sets the numeric day of the month in the Date object using Universal Coordinated Time (UTC).
+      * @param date A numeric value equal to the day of the month.
+      */
+    setUTCDate(date: number): number;
+    /**
+      * Sets the month value in the Date object using local time.
+      * @param month A numeric value equal to the month. The value for January is 0, and other month values follow consecutively.
+      * @param date A numeric value representing the day of the month. If this value is not supplied, the value from a call to the getDate method is used.
+      */
+    setMonth(month: number, date?: number): number;
+    /**
+      * Sets the month value in the Date object using Universal Coordinated Time (UTC).
+      * @param month A numeric value equal to the month. The value for January is 0, and other month values follow consecutively.
+      * @param date A numeric value representing the day of the month. If it is not supplied, the value from a call to the getUTCDate method is used.
+      */
+    setUTCMonth(month: number, date?: number): number;
+    /**
+      * Sets the year of the Date object using local time.
+      * @param year A numeric value for the year.
+      * @param month A zero-based numeric value for the month (0 for January, 11 for December). Must be specified if numDate is specified.
+      * @param date A numeric value equal for the day of the month.
+      */
+    setFullYear(year: number, month?: number, date?: number): number;
+    /**
+      * Sets the year value in the Date object using Universal Coordinated Time (UTC).
+      * @param year A numeric value equal to the year.
+      * @param month A numeric value equal to the month. The value for January is 0, and other month values follow consecutively. Must be supplied if numDate is supplied.
+      * @param date A numeric value equal to the day of the month.
+      */
+    setUTCFullYear(year: number, month?: number, date?: number): number;
+    /** Returns a date converted to a string using Universal Coordinated Time (UTC). */
+    toUTCString(): string;
+    /** Returns a date as a string value in ISO format. */
+    toISOString(): string;
+    /** Used by the JSON.stringify method to enable the transformation of an object's data for JavaScript Object Notation (JSON) serialization. */
+    toJSON(key?: any): string;
+}
+
+interface DateConstructor {
+    new(): Date;
+    new(value: number): Date;
+    new(value: string): Date;
+    new(year: number, month: number, date?: number, hours?: number, minutes?: number, seconds?: number, ms?: number): Date;
+    (): string;
+    readonly prototype: Date;
+    /**
+      * Parses a string containing a date, and returns the number of milliseconds between that date and midnight, January 1, 1970.
+      * @param s A date string
+      */
+    parse(s: string): number;
+    /**
+      * Returns the number of milliseconds between midnight, January 1, 1970 Universal Coordinated Time (UTC) (or GMT) and the specified date.
+      * @param year The full year designation is required for cross-century date accuracy. If year is between 0 and 99 is used, then year is assumed to be 1900 + year.
+      * @param month The month as an number between 0 and 11 (January to December).
+      * @param date The date as an number between 1 and 31.
+      * @param hours Must be supplied if minutes is supplied. An number from 0 to 23 (midnight to 11pm) that specifies the hour.
+      * @param minutes Must be supplied if seconds is supplied. An number from 0 to 59 that specifies the minutes.
+      * @param seconds Must be supplied if milliseconds is supplied. An number from 0 to 59 that specifies the seconds.
+      * @param ms An number from 0 to 999 that specifies the milliseconds.
+      */
+    UTC(year: number, month: number, date?: number, hours?: number, minutes?: number, seconds?: number, ms?: number): number;
+    now(): number;
+}
+
+declare const Date: DateConstructor;
+
+interface RegExpMatchArray extends Array<string> {
+    index?: number;
+    input?: string;
+}
+
+interface RegExpExecArray extends Array<string> {
+    index: number;
+    input: string;
+}
+
+interface RegExp {
+    /**
+      * Executes a search on a string using a regular expression pattern, and returns an array containing the results of that search.
+      * @param string The String object or string literal on which to perform the search.
+      */
+    exec(string: string): RegExpExecArray | null;
+
+    /**
+      * Returns a Boolean value that indicates whether or not a pattern exists in a searched string.
+      * @param string String on which to perform the search.
+      */
+    test(string: string): boolean;
+
+    /** Returns a copy of the text of the regular expression pattern. Read-only. The regExp argument is a Regular expression object. It can be a variable name or a literal. */
+    readonly source: string;
+
+    /** Returns a Boolean value indicating the state of the global flag (g) used with a regular expression. Default is false. Read-only. */
+    readonly global: boolean;
+
+    /** Returns a Boolean value indicating the state of the ignoreCase flag (i) used with a regular expression. Default is false. Read-only. */
+    readonly ignoreCase: boolean;
+
+    /** Returns a Boolean value indicating the state of the multiline flag (m) used with a regular expression. Default is false. Read-only. */
+    readonly multiline: boolean;
+
+    lastIndex: number;
+
+    // Non-standard extensions
+    compile(): this;
+}
+
+interface RegExpConstructor {
+    new(pattern: RegExp | string): RegExp;
+    new(pattern: string, flags?: string): RegExp;
+    (pattern: RegExp | string): RegExp;
+    (pattern: string, flags?: string): RegExp;
+    readonly prototype: RegExp;
+
+    // Non-standard extensions
+    $1: string;
+    $2: string;
+    $3: string;
+    $4: string;
+    $5: string;
+    $6: string;
+    $7: string;
+    $8: string;
+    $9: string;
+    lastMatch: string;
+}
+
+declare const RegExp: RegExpConstructor;
+
+interface Error {
+    name: string;
+    message: string;
+    stack?: string;
+}
+
+interface ErrorConstructor {
+    new(message?: string): Error;
+    (message?: string): Error;
+    readonly prototype: Error;
+}
+
+declare const Error: ErrorConstructor;
+
+interface EvalError extends Error {
+}
+
+interface EvalErrorConstructor {
+    new(message?: string): EvalError;
+    (message?: string): EvalError;
+    readonly prototype: EvalError;
+}
+
+declare const EvalError: EvalErrorConstructor;
+
+interface RangeError extends Error {
+}
+
+interface RangeErrorConstructor {
+    new(message?: string): RangeError;
+    (message?: string): RangeError;
+    readonly prototype: RangeError;
+}
+
+declare const RangeError: RangeErrorConstructor;
+
+interface ReferenceError extends Error {
+}
+
+interface ReferenceErrorConstructor {
+    new(message?: string): ReferenceError;
+    (message?: string): ReferenceError;
+    readonly prototype: ReferenceError;
+}
+
+declare const ReferenceError: ReferenceErrorConstructor;
+
+interface SyntaxError extends Error {
+}
+
+interface SyntaxErrorConstructor {
+    new(message?: string): SyntaxError;
+    (message?: string): SyntaxError;
+    readonly prototype: SyntaxError;
+}
+
+declare const SyntaxError: SyntaxErrorConstructor;
+
+interface TypeError extends Error {
+}
+
+interface TypeErrorConstructor {
+    new(message?: string): TypeError;
+    (message?: string): TypeError;
+    readonly prototype: TypeError;
+}
+
+declare const TypeError: TypeErrorConstructor;
+
+interface URIError extends Error {
+}
+
+interface URIErrorConstructor {
+    new(message?: string): URIError;
+    (message?: string): URIError;
+    readonly prototype: URIError;
+}
+
+declare const URIError: URIErrorConstructor;
+
+interface JSON {
+    /**
+      * Converts a JavaScript Object Notation (JSON) string into an object.
+      * @param text A valid JSON string.
+      * @param reviver A function that transforms the results. This function is called for each member of the object.
+      * If a member contains nested objects, the nested objects are transformed before the parent object is.
+      */
+    parse(text: string, reviver?: (key: any, value: any) => any): any;
+    /**
+      * Converts a JavaScript value to a JavaScript Object Notation (JSON) string.
+      * @param value A JavaScript value, usually an object or array, to be converted.
+      * @param replacer A function that transforms the results.
+      * @param space Adds indentation, white space, and line break characters to the return-value JSON text to make it easier to read.
+      */
+    stringify(value: any, replacer?: (key: string, value: any) => any, space?: string | number): string;
+    /**
+      * Converts a JavaScript value to a JavaScript Object Notation (JSON) string.
+      * @param value A JavaScript value, usually an object or array, to be converted.
+      * @param replacer An array of strings and numbers that acts as a approved list for selecting the object properties that will be stringified.
+      * @param space Adds indentation, white space, and line break characters to the return-value JSON text to make it easier to read.
+      */
+    stringify(value: any, replacer?: (number | string)[] | null, space?: string | number): string;
+}
+
+/**
+  * An intrinsic object that provides functions to convert JavaScript values to and from the JavaScript Object Notation (JSON) format.
+  */
+declare const JSON: JSON;
+
+
+/////////////////////////////
+/// ECMAScript Array API (specially handled by compiler)
+/////////////////////////////
+
+interface ReadonlyArray<T> {
+    /**
+      * Gets the length of the array. This is a number one higher than the highest element defined in an array.
+      */
+    readonly length: number;
+    /**
+      * Returns a string representation of an array.
+      */
+    toString(): string;
+    /**
+      * Returns a string representation of an array. The elements are converted to string using thier toLocalString methods.
+      */
+    toLocaleString(): string;
+    /**
+      * Combines two or more arrays.
+      * @param items Additional items to add to the end of array1.
+      */
+    concat(...items: T[][]): T[];
+    /**
+      * Combines two or more arrays.
+      * @param items Additional items to add to the end of array1.
+      */
+    concat(...items: (T | T[])[]): T[];
+    /**
+      * Adds all the elements of an array separated by the specified separator string.
+      * @param separator A string used to separate one element of an array from the next in the resulting String. If omitted, the array elements are separated with a comma.
+      */
+    join(separator?: string): string;
+    /**
+      * Returns a section of an array.
+      * @param start The beginning of the specified portion of the array.
+      * @param end The end of the specified portion of the array.
+      */
+    slice(start?: number, end?: number): T[];
+    /**
+      * Returns the index of the first occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the search starts at index 0.
+      */
+    indexOf(searchElement: T, fromIndex?: number): number;
+    /**
+      * Returns the index of the last occurrence of a specified value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the search starts at the last index in the array.
+      */
+    lastIndexOf(searchElement: T, fromIndex?: number): number;
+    /**
+      * Determines whether all the members of an array satisfy the specified test.
+      * @param callbackfn A function that accepts up to three arguments. The every method calls the callbackfn function for each element in array1 until the callbackfn returns false, or until the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
+      */
+    every(callbackfn: (value: T, index: number, array: ReadonlyArray<T>) => boolean, thisArg?: any): boolean;
+    /**
+      * Determines whether the specified callback function returns true for any element of an array.
+      * @param callbackfn A function that accepts up to three arguments. The some method calls the callbackfn function for each element in array1 until the callbackfn returns true, or until the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
+      */
+    some(callbackfn: (value: T, index: number, array: ReadonlyArray<T>) => boolean, thisArg?: any): boolean;
+    /**
+      * Performs the specified action for each element in an array.
+      * @param callbackfn  A function that accepts up to three arguments. forEach calls the callbackfn function one time for each element in the array.
+      * @param thisArg  An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
+      */
+    forEach(callbackfn: (value: T, index: number, array: ReadonlyArray<T>) => void, thisArg?: any): void;
+    /**
+      * Calls a defined callback function on each element of an array, and returns an array that contains the results.
+      * @param callbackfn A function that accepts up to three arguments. The map method calls the callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
+      */
+    map<U>(callbackfn: (value: T, index: number, array: ReadonlyArray<T>) => U, thisArg?: any): U[];
+    /**
+     * Returns the elements of an array that meet the condition specified in a callback function.
+     * @param callbackfn A function that accepts up to three arguments. The filter method calls the callbackfn function one time for each element in the array.
+     * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
+     */
+    filter<S extends T>(callbackfn: (value: T, index: number, array: ReadonlyArray<T>) => value is S, thisArg?: any): S[];
+    /**
+      * Returns the elements of an array that meet the condition specified in a callback function.
+      * @param callbackfn A function that accepts up to three arguments. The filter method calls the callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
+      */
+    filter(callbackfn: (value: T, index: number, array: ReadonlyArray<T>) => any, thisArg?: any): T[];
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
+      */
+    reduce(callbackfn: (previousValue: T, currentValue: T, currentIndex: number, array: ReadonlyArray<T>) => T, initialValue?: T): T;
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
+      */
+    reduce<U>(callbackfn: (previousValue: U, currentValue: T, currentIndex: number, array: ReadonlyArray<T>) => U, initialValue: U): U;
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
+      */
+    reduceRight(callbackfn: (previousValue: T, currentValue: T, currentIndex: number, array: ReadonlyArray<T>) => T, initialValue?: T): T;
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
+      */
+    reduceRight<U>(callbackfn: (previousValue: U, currentValue: T, currentIndex: number, array: ReadonlyArray<T>) => U, initialValue: U): U;
+
+    readonly [n: number]: T;
+}
+
+interface Array<T> {
+    /**
+      * Gets or sets the length of the array. This is a number one higher than the highest element defined in an array.
+      */
+    length: number;
+    /**
+      * Returns a string representation of an array.
+      */
+    toString(): string;
+    /**
+      * Returns a string representation of an array. The elements are converted to string using thier toLocalString methods.
+      */
+    toLocaleString(): string;
+    /**
+      * Appends new elements to an array, and returns the new length of the array.
+      * @param items New elements of the Array.
+      */
+    push(...items: T[]): number;
+    /**
+      * Removes the last element from an array and returns it.
+      */
+    pop(): T | undefined;
+    /**
+      * Combines two or more arrays.
+      * @param items Additional items to add to the end of array1.
+      */
+    concat(...items: T[][]): T[];
+    /**
+      * Combines two or more arrays.
+      * @param items Additional items to add to the end of array1.
+      */
+    concat(...items: (T | T[])[]): T[];
+    /**
+      * Adds all the elements of an array separated by the specified separator string.
+      * @param separator A string used to separate one element of an array from the next in the resulting String. If omitted, the array elements are separated with a comma.
+      */
+    join(separator?: string): string;
+    /**
+      * Reverses the elements in an Array.
+      */
+    reverse(): T[];
+    /**
+      * Removes the first element from an array and returns it.
+      */
+    shift(): T | undefined;
+    /**
+      * Returns a section of an array.
+      * @param start The beginning of the specified portion of the array.
+      * @param end The end of the specified portion of the array.
+      */
+    slice(start?: number, end?: number): T[];
+    /**
+      * Sorts an array.
+      * @param compareFn The name of the function used to determine the order of the elements. If omitted, the elements are sorted in ascending, ASCII character order.
+      */
+    sort(compareFn?: (a: T, b: T) => number): this;
+    /**
+      * Removes elements from an array and, if necessary, inserts new elements in their place, returning the deleted elements.
+      * @param start The zero-based location in the array from which to start removing elements.
+      * @param deleteCount The number of elements to remove.
+      */
+    splice(start: number, deleteCount?: number): T[];
+    /**
+      * Removes elements from an array and, if necessary, inserts new elements in their place, returning the deleted elements.
+      * @param start The zero-based location in the array from which to start removing elements.
+      * @param deleteCount The number of elements to remove.
+      * @param items Elements to insert into the array in place of the deleted elements.
+      */
+    splice(start: number, deleteCount: number, ...items: T[]): T[];
+    /**
+      * Inserts new elements at the start of an array.
+      * @param items  Elements to insert at the start of the Array.
+      */
+    unshift(...items: T[]): number;
+    /**
+      * Returns the index of the first occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the search starts at index 0.
+      */
+    indexOf(searchElement: T, fromIndex?: number): number;
+    /**
+      * Returns the index of the last occurrence of a specified value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the search starts at the last index in the array.
+      */
+    lastIndexOf(searchElement: T, fromIndex?: number): number;
+    /**
+      * Determines whether all the members of an array satisfy the specified test.
+      * @param callbackfn A function that accepts up to three arguments. The every method calls the callbackfn function for each element in array1 until the callbackfn returns false, or until the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
+      */
+    every(callbackfn: (value: T, index: number, array: T[]) => boolean, thisArg?: any): boolean;
+    /**
+      * Determines whether the specified callback function returns true for any element of an array.
+      * @param callbackfn A function that accepts up to three arguments. The some method calls the callbackfn function for each element in array1 until the callbackfn returns true, or until the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
+      */
+    some(callbackfn: (value: T, index: number, array: T[]) => boolean, thisArg?: any): boolean;
+    /**
+      * Performs the specified action for each element in an array.
+      * @param callbackfn  A function that accepts up to three arguments. forEach calls the callbackfn function one time for each element in the array.
+      * @param thisArg  An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
+      */
+    forEach(callbackfn: (value: T, index: number, array: T[]) => void, thisArg?: any): void;
+    /**
+      * Calls a defined callback function on each element of an array, and returns an array that contains the results.
+      * @param callbackfn A function that accepts up to three arguments. The map method calls the callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
+      */
+    map<U>(callbackfn: (value: T, index: number, array: T[]) => U, thisArg?: any): U[];
+    /**
+     * Returns the elements of an array that meet the condition specified in a callback function.
+     * @param callbackfn A function that accepts up to three arguments. The filter method calls the callbackfn function one time for each element in the array.
+     * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
+     */
+    filter<S extends T>(callbackfn: (value: T, index: number, array: T[]) => value is S, thisArg?: any): S[];
+    /**
+      * Returns the elements of an array that meet the condition specified in a callback function.
+      * @param callbackfn A function that accepts up to three arguments. The filter method calls the callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
+      */
+    filter(callbackfn: (value: T, index: number, array: T[]) => any, thisArg?: any): T[];
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
+      */
+    reduce(callbackfn: (previousValue: T, currentValue: T, currentIndex: number, array: T[]) => T, initialValue?: T): T;
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
+      */
+    reduce<U>(callbackfn: (previousValue: U, currentValue: T, currentIndex: number, array: T[]) => U, initialValue: U): U;
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
+      */
+    reduceRight(callbackfn: (previousValue: T, currentValue: T, currentIndex: number, array: T[]) => T, initialValue?: T): T;
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
+      */
+    reduceRight<U>(callbackfn: (previousValue: U, currentValue: T, currentIndex: number, array: T[]) => U, initialValue: U): U;
+
+    [n: number]: T;
+}
+
+interface ArrayConstructor {
+    new(arrayLength?: number): any[];
+    new <T>(arrayLength: number): T[];
+    new <T>(...items: T[]): T[];
+    (arrayLength?: number): any[];
+    <T>(arrayLength: number): T[];
+    <T>(...items: T[]): T[];
+    isArray(arg: any): arg is Array<any>;
+    readonly prototype: Array<any>;
+}
+
+declare const Array: ArrayConstructor;
+
+interface TypedPropertyDescriptor<T> {
+    enumerable?: boolean;
+    configurable?: boolean;
+    writable?: boolean;
+    value?: T;
+    get?: () => T;
+    set?: (value: T) => void;
+}
+
+declare type ClassDecorator = <TFunction extends Function>(target: TFunction) => TFunction | void;
+declare type PropertyDecorator = (target: Object, propertyKey: string | symbol) => void;
+declare type MethodDecorator = <T>(target: Object, propertyKey: string | symbol, descriptor: TypedPropertyDescriptor<T>) => TypedPropertyDescriptor<T> | void;
+declare type ParameterDecorator = (target: Object, propertyKey: string | symbol, parameterIndex: number) => void;
+
+declare type PromiseConstructorLike = new <T>(executor: (resolve: (value?: T | PromiseLike<T>) => void, reject: (reason?: any) => void) => void) => PromiseLike<T>;
+
+interface PromiseLike<T> {
+    /**
+     * Attaches callbacks for the resolution and/or rejection of the Promise.
+     * @param onfulfilled The callback to execute when the Promise is resolved.
+     * @param onrejected The callback to execute when the Promise is rejected.
+     * @returns A Promise for the completion of which ever callback is executed.
+     */
+    then<TResult1 = T, TResult2 = never>(onfulfilled?: ((value: T) => TResult1 | PromiseLike<TResult1>) | undefined | null, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | undefined | null): PromiseLike<TResult1 | TResult2>;
+}
+
+/**
+ * Represents the completion of an asynchronous operation
+ */
+interface Promise<T> {
+    /**
+     * Attaches callbacks for the resolution and/or rejection of the Promise.
+     * @param onfulfilled The callback to execute when the Promise is resolved.
+     * @param onrejected The callback to execute when the Promise is rejected.
+     * @returns A Promise for the completion of which ever callback is executed.
+     */
+    then<TResult1 = T, TResult2 = never>(onfulfilled?: ((value: T) => TResult1 | PromiseLike<TResult1>) | undefined | null, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | undefined | null): Promise<TResult1 | TResult2>;
+
+    /**
+     * Attaches a callback for only the rejection of the Promise.
+     * @param onrejected The callback to execute when the Promise is rejected.
+     * @returns A Promise for the completion of the callback.
+     */
+    catch<TResult = never>(onrejected?: ((reason: any) => TResult | PromiseLike<TResult>) | undefined | null): Promise<T | TResult>;
+}
+
+interface ArrayLike<T> {
+    readonly length: number;
+    readonly [n: number]: T;
+}
+
+/**
+ * Make all properties in T optional
+ */
+type Partial<T> = {
+    [P in keyof T]?: T[P];
+};
+
+/**
+ * Make all properties in T readonly
+ */
+type Readonly<T> = {
+    readonly [P in keyof T]: T[P];
+};
+
+/**
+ * From T pick a set of properties K
+ */
+type Pick<T, K extends keyof T> = {
+    [P in K]: T[P];
+};
+
+/**
+ * Construct a type with a set of properties K of type T
+ */
+type Record<K extends string, T> = {
+    [P in K]: T;
+};
+
+/**
+ * Marker for contextual 'this' type
+ */
+interface ThisType<T> { }
+
+/**
+  * Represents a raw buffer of binary data, which is used to store data for the
+  * different typed arrays. ArrayBuffers cannot be read from or written to directly,
+  * but can be passed to a typed array or DataView Object to interpret the raw
+  * buffer as needed.
+  */
+interface ArrayBuffer {
+    /**
+      * Read-only. The length of the ArrayBuffer (in bytes).
+      */
+    readonly byteLength: number;
+
+    /**
+      * Returns a section of an ArrayBuffer.
+      */
+    slice(begin: number, end?: number): ArrayBuffer;
+}
+
+/**
+ * Allowed ArrayBuffer types for the buffer of an ArrayBufferView and related Typed Arrays.
+ */
+interface ArrayBufferTypes {
+    ArrayBuffer: ArrayBuffer;
+}
+type ArrayBufferLike = ArrayBufferTypes[keyof ArrayBufferTypes];
+
+interface ArrayBufferConstructor {
+    readonly prototype: ArrayBuffer;
+    new(byteLength: number): ArrayBuffer;
+    isView(arg: any): arg is ArrayBufferView;
+}
+declare const ArrayBuffer: ArrayBufferConstructor;
+
+interface ArrayBufferView {
+    /**
+      * The ArrayBuffer instance referenced by the array.
+      */
+    buffer: ArrayBufferLike;
+
+    /**
+      * The length in bytes of the array.
+      */
+    byteLength: number;
+
+    /**
+      * The offset in bytes of the array.
+      */
+    byteOffset: number;
+}
+
+interface DataView {
+    readonly buffer: ArrayBuffer;
+    readonly byteLength: number;
+    readonly byteOffset: number;
+    /**
+      * Gets the Float32 value at the specified byte offset from the start of the view. There is
+      * no alignment constraint; multi-byte values may be fetched from any offset.
+      * @param byteOffset The place in the buffer at which the value should be retrieved.
+      */
+    getFloat32(byteOffset: number, littleEndian?: boolean): number;
+
+    /**
+      * Gets the Float64 value at the specified byte offset from the start of the view. There is
+      * no alignment constraint; multi-byte values may be fetched from any offset.
+      * @param byteOffset The place in the buffer at which the value should be retrieved.
+      */
+    getFloat64(byteOffset: number, littleEndian?: boolean): number;
+
+    /**
+      * Gets the Int8 value at the specified byte offset from the start of the view. There is
+      * no alignment constraint; multi-byte values may be fetched from any offset.
+      * @param byteOffset The place in the buffer at which the value should be retrieved.
+      */
+    getInt8(byteOffset: number): number;
+
+    /**
+      * Gets the Int16 value at the specified byte offset from the start of the view. There is
+      * no alignment constraint; multi-byte values may be fetched from any offset.
+      * @param byteOffset The place in the buffer at which the value should be retrieved.
+      */
+    getInt16(byteOffset: number, littleEndian?: boolean): number;
+    /**
+      * Gets the Int32 value at the specified byte offset from the start of the view. There is
+      * no alignment constraint; multi-byte values may be fetched from any offset.
+      * @param byteOffset The place in the buffer at which the value should be retrieved.
+      */
+    getInt32(byteOffset: number, littleEndian?: boolean): number;
+
+    /**
+      * Gets the Uint8 value at the specified byte offset from the start of the view. There is
+      * no alignment constraint; multi-byte values may be fetched from any offset.
+      * @param byteOffset The place in the buffer at which the value should be retrieved.
+      */
+    getUint8(byteOffset: number): number;
+
+    /**
+      * Gets the Uint16 value at the specified byte offset from the start of the view. There is
+      * no alignment constraint; multi-byte values may be fetched from any offset.
+      * @param byteOffset The place in the buffer at which the value should be retrieved.
+      */
+    getUint16(byteOffset: number, littleEndian?: boolean): number;
+
+    /**
+      * Gets the Uint32 value at the specified byte offset from the start of the view. There is
+      * no alignment constraint; multi-byte values may be fetched from any offset.
+      * @param byteOffset The place in the buffer at which the value should be retrieved.
+      */
+    getUint32(byteOffset: number, littleEndian?: boolean): number;
+
+    /**
+      * Stores an Float32 value at the specified byte offset from the start of the view.
+      * @param byteOffset The place in the buffer at which the value should be set.
+      * @param value The value to set.
+      * @param littleEndian If false or undefined, a big-endian value should be written,
+      * otherwise a little-endian value should be written.
+      */
+    setFloat32(byteOffset: number, value: number, littleEndian?: boolean): void;
+
+    /**
+      * Stores an Float64 value at the specified byte offset from the start of the view.
+      * @param byteOffset The place in the buffer at which the value should be set.
+      * @param value The value to set.
+      * @param littleEndian If false or undefined, a big-endian value should be written,
+      * otherwise a little-endian value should be written.
+      */
+    setFloat64(byteOffset: number, value: number, littleEndian?: boolean): void;
+
+    /**
+      * Stores an Int8 value at the specified byte offset from the start of the view.
+      * @param byteOffset The place in the buffer at which the value should be set.
+      * @param value The value to set.
+      */
+    setInt8(byteOffset: number, value: number): void;
+
+    /**
+      * Stores an Int16 value at the specified byte offset from the start of the view.
+      * @param byteOffset The place in the buffer at which the value should be set.
+      * @param value The value to set.
+      * @param littleEndian If false or undefined, a big-endian value should be written,
+      * otherwise a little-endian value should be written.
+      */
+    setInt16(byteOffset: number, value: number, littleEndian?: boolean): void;
+
+    /**
+      * Stores an Int32 value at the specified byte offset from the start of the view.
+      * @param byteOffset The place in the buffer at which the value should be set.
+      * @param value The value to set.
+      * @param littleEndian If false or undefined, a big-endian value should be written,
+      * otherwise a little-endian value should be written.
+      */
+    setInt32(byteOffset: number, value: number, littleEndian?: boolean): void;
+
+    /**
+      * Stores an Uint8 value at the specified byte offset from the start of the view.
+      * @param byteOffset The place in the buffer at which the value should be set.
+      * @param value The value to set.
+      */
+    setUint8(byteOffset: number, value: number): void;
+
+    /**
+      * Stores an Uint16 value at the specified byte offset from the start of the view.
+      * @param byteOffset The place in the buffer at which the value should be set.
+      * @param value The value to set.
+      * @param littleEndian If false or undefined, a big-endian value should be written,
+      * otherwise a little-endian value should be written.
+      */
+    setUint16(byteOffset: number, value: number, littleEndian?: boolean): void;
+
+    /**
+      * Stores an Uint32 value at the specified byte offset from the start of the view.
+      * @param byteOffset The place in the buffer at which the value should be set.
+      * @param value The value to set.
+      * @param littleEndian If false or undefined, a big-endian value should be written,
+      * otherwise a little-endian value should be written.
+      */
+    setUint32(byteOffset: number, value: number, littleEndian?: boolean): void;
+}
+
+interface DataViewConstructor {
+    new(buffer: ArrayBufferLike, byteOffset?: number, byteLength?: number): DataView;
+}
+declare const DataView: DataViewConstructor;
+
+/**
+  * A typed array of 8-bit integer values. The contents are initialized to 0. If the requested
+  * number of bytes could not be allocated an exception is raised.
+  */
+interface Int8Array {
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * The ArrayBuffer instance referenced by the array.
+      */
+    readonly buffer: ArrayBufferLike;
+
+    /**
+      * The length in bytes of the array.
+      */
+    readonly byteLength: number;
+
+    /**
+      * The offset in bytes of the array.
+      */
+    readonly byteOffset: number;
+
+    /**
+      * Returns the this object after copying a section of the array identified by start and end
+      * to the same array starting at position target
+      * @param target If target is negative, it is treated as length+target where length is the
+      * length of the array.
+      * @param start If start is negative, it is treated as length+start. If end is negative, it
+      * is treated as length+end.
+      * @param end If not specified, length of the this object is used as its default value.
+      */
+    copyWithin(target: number, start: number, end?: number): this;
+
+    /**
+      * Determines whether all the members of an array satisfy the specified test.
+      * @param callbackfn A function that accepts up to three arguments. The every method calls
+      * the callbackfn function for each element in array1 until the callbackfn returns false,
+      * or until the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    every(callbackfn: (value: number, index: number, array: Int8Array) => boolean, thisArg?: any): boolean;
+
+    /**
+        * Returns the this object after filling the section identified by start and end with value
+        * @param value value to fill array section with
+        * @param start index to start filling the array at. If start is negative, it is treated as
+        * length+start where length is the length of the array.
+        * @param end index to stop filling the array at. If end is negative, it is treated as
+        * length+end.
+        */
+    fill(value: number, start?: number, end?: number): this;
+
+    /**
+      * Returns the elements of an array that meet the condition specified in a callback function.
+      * @param callbackfn A function that accepts up to three arguments. The filter method calls
+      * the callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    filter(callbackfn: (value: number, index: number, array: Int8Array) => any, thisArg?: any): Int8Array;
+
+    /**
+      * Returns the value of the first element in the array where predicate is true, and undefined
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found, find
+      * immediately returns that element value. Otherwise, find returns undefined.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
+
+    /**
+      * Returns the index of the first element in the array where predicate is true, and -1
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found,
+      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
+
+    /**
+      * Performs the specified action for each element in an array.
+      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    forEach(callbackfn: (value: number, index: number, array: Int8Array) => void, thisArg?: any): void;
+
+    /**
+      * Returns the index of the first occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      *  search starts at index 0.
+      */
+    indexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * Adds all the elements of an array separated by the specified separator string.
+      * @param separator A string used to separate one element of an array from the next in the
+      * resulting String. If omitted, the array elements are separated with a comma.
+      */
+    join(separator?: string): string;
+
+    /**
+      * Returns the index of the last occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      * search starts at index 0.
+      */
+    lastIndexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * The length of the array.
+      */
+    readonly length: number;
+
+    /**
+      * Calls a defined callback function on each element of an array, and returns an array that
+      * contains the results.
+      * @param callbackfn A function that accepts up to three arguments. The map method calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    map(callbackfn: (this: void, value: number, index: number, array: Int8Array) => number, thisArg?: any): Int8Array;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Int8Array) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Int8Array) => U, initialValue: U): U;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an
+      * argument instead of an array value.
+      */
+    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Int8Array) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Int8Array) => U, initialValue: U): U;
+
+    /**
+      * Reverses the elements in an Array.
+      */
+    reverse(): Int8Array;
+
+    /**
+      * Sets a value or an array of values.
+      * @param array A typed or untyped array of values to set.
+      * @param offset The index in the current array at which the values are to be written.
+      */
+    set(array: ArrayLike<number>, offset?: number): void;
+
+    /**
+      * Returns a section of an array.
+      * @param start The beginning of the specified portion of the array.
+      * @param end The end of the specified portion of the array.
+      */
+    slice(start?: number, end?: number): Int8Array;
+
+    /**
+      * Determines whether the specified callback function returns true for any element of an array.
+      * @param callbackfn A function that accepts up to three arguments. The some method calls the
+      * callbackfn function for each element in array1 until the callbackfn returns true, or until
+      * the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    some(callbackfn: (value: number, index: number, array: Int8Array) => boolean, thisArg?: any): boolean;
+
+    /**
+      * Sorts an array.
+      * @param compareFn The name of the function used to determine the order of the elements. If
+      * omitted, the elements are sorted in ascending, ASCII character order.
+      */
+    sort(compareFn?: (a: number, b: number) => number): this;
+
+    /**
+      * Gets a new Int8Array view of the ArrayBuffer store for this array, referencing the elements
+      * at begin, inclusive, up to end, exclusive.
+      * @param begin The index of the beginning of the array.
+      * @param end The index of the end of the array.
+      */
+    subarray(begin: number, end?: number): Int8Array;
+
+    /**
+      * Converts a number to a string by using the current locale.
+      */
+    toLocaleString(): string;
+
+    /**
+      * Returns a string representation of an array.
+      */
+    toString(): string;
+
+    [index: number]: number;
+}
+interface Int8ArrayConstructor {
+    readonly prototype: Int8Array;
+    new(length: number): Int8Array;
+    new(array: ArrayLike<number>): Int8Array;
+    new(buffer: ArrayBufferLike, byteOffset?: number, length?: number): Int8Array;
+
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * Returns a new array from a set of elements.
+      * @param items A set of elements to include in the new array object.
+      */
+    of(...items: number[]): Int8Array;
+
+    /**
+      * Creates an array from an array-like or iterable object.
+      * @param arrayLike An array-like or iterable object to convert to an array.
+      * @param mapfn A mapping function to call on every element of the array.
+      * @param thisArg Value of 'this' used to invoke the mapfn.
+      */
+    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Int8Array;
+
+
+}
+declare const Int8Array: Int8ArrayConstructor;
+
+/**
+  * A typed array of 8-bit unsigned integer values. The contents are initialized to 0. If the
+  * requested number of bytes could not be allocated an exception is raised.
+  */
+interface Uint8Array {
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * The ArrayBuffer instance referenced by the array.
+      */
+    readonly buffer: ArrayBufferLike;
+
+    /**
+      * The length in bytes of the array.
+      */
+    readonly byteLength: number;
+
+    /**
+      * The offset in bytes of the array.
+      */
+    readonly byteOffset: number;
+
+    /**
+      * Returns the this object after copying a section of the array identified by start and end
+      * to the same array starting at position target
+      * @param target If target is negative, it is treated as length+target where length is the
+      * length of the array.
+      * @param start If start is negative, it is treated as length+start. If end is negative, it
+      * is treated as length+end.
+      * @param end If not specified, length of the this object is used as its default value.
+      */
+    copyWithin(target: number, start: number, end?: number): this;
+
+    /**
+      * Determines whether all the members of an array satisfy the specified test.
+      * @param callbackfn A function that accepts up to three arguments. The every method calls
+      * the callbackfn function for each element in array1 until the callbackfn returns false,
+      * or until the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    every(callbackfn: (value: number, index: number, array: Uint8Array) => boolean, thisArg?: any): boolean;
+
+    /**
+        * Returns the this object after filling the section identified by start and end with value
+        * @param value value to fill array section with
+        * @param start index to start filling the array at. If start is negative, it is treated as
+        * length+start where length is the length of the array.
+        * @param end index to stop filling the array at. If end is negative, it is treated as
+        * length+end.
+        */
+    fill(value: number, start?: number, end?: number): this;
+
+    /**
+      * Returns the elements of an array that meet the condition specified in a callback function.
+      * @param callbackfn A function that accepts up to three arguments. The filter method calls
+      * the callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    filter(callbackfn: (value: number, index: number, array: Uint8Array) => any, thisArg?: any): Uint8Array;
+
+    /**
+      * Returns the value of the first element in the array where predicate is true, and undefined
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found, find
+      * immediately returns that element value. Otherwise, find returns undefined.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
+
+    /**
+      * Returns the index of the first element in the array where predicate is true, and -1
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found,
+      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
+
+    /**
+      * Performs the specified action for each element in an array.
+      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    forEach(callbackfn: (value: number, index: number, array: Uint8Array) => void, thisArg?: any): void;
+
+    /**
+      * Returns the index of the first occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      *  search starts at index 0.
+      */
+    indexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * Adds all the elements of an array separated by the specified separator string.
+      * @param separator A string used to separate one element of an array from the next in the
+      * resulting String. If omitted, the array elements are separated with a comma.
+      */
+    join(separator?: string): string;
+
+    /**
+      * Returns the index of the last occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      * search starts at index 0.
+      */
+    lastIndexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * The length of the array.
+      */
+    readonly length: number;
+
+    /**
+      * Calls a defined callback function on each element of an array, and returns an array that
+      * contains the results.
+      * @param callbackfn A function that accepts up to three arguments. The map method calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    map(callbackfn: (this: void, value: number, index: number, array: Uint8Array) => number, thisArg?: any): Uint8Array;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Uint8Array) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Uint8Array) => U, initialValue: U): U;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an
+      * argument instead of an array value.
+      */
+    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Uint8Array) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Uint8Array) => U, initialValue: U): U;
+
+    /**
+      * Reverses the elements in an Array.
+      */
+    reverse(): Uint8Array;
+
+    /**
+      * Sets a value or an array of values.
+      * @param array A typed or untyped array of values to set.
+      * @param offset The index in the current array at which the values are to be written.
+      */
+    set(array: ArrayLike<number>, offset?: number): void;
+
+    /**
+      * Returns a section of an array.
+      * @param start The beginning of the specified portion of the array.
+      * @param end The end of the specified portion of the array.
+      */
+    slice(start?: number, end?: number): Uint8Array;
+
+    /**
+      * Determines whether the specified callback function returns true for any element of an array.
+      * @param callbackfn A function that accepts up to three arguments. The some method calls the
+      * callbackfn function for each element in array1 until the callbackfn returns true, or until
+      * the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    some(callbackfn: (value: number, index: number, array: Uint8Array) => boolean, thisArg?: any): boolean;
+
+    /**
+      * Sorts an array.
+      * @param compareFn The name of the function used to determine the order of the elements. If
+      * omitted, the elements are sorted in ascending, ASCII character order.
+      */
+    sort(compareFn?: (a: number, b: number) => number): this;
+
+    /**
+      * Gets a new Uint8Array view of the ArrayBuffer store for this array, referencing the elements
+      * at begin, inclusive, up to end, exclusive.
+      * @param begin The index of the beginning of the array.
+      * @param end The index of the end of the array.
+      */
+    subarray(begin: number, end?: number): Uint8Array;
+
+    /**
+      * Converts a number to a string by using the current locale.
+      */
+    toLocaleString(): string;
+
+    /**
+      * Returns a string representation of an array.
+      */
+    toString(): string;
+
+    [index: number]: number;
+}
+
+interface Uint8ArrayConstructor {
+    readonly prototype: Uint8Array;
+    new(length: number): Uint8Array;
+    new(array: ArrayLike<number>): Uint8Array;
+    new(buffer: ArrayBufferLike, byteOffset?: number, length?: number): Uint8Array;
+
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * Returns a new array from a set of elements.
+      * @param items A set of elements to include in the new array object.
+      */
+    of(...items: number[]): Uint8Array;
+
+    /**
+      * Creates an array from an array-like or iterable object.
+      * @param arrayLike An array-like or iterable object to convert to an array.
+      * @param mapfn A mapping function to call on every element of the array.
+      * @param thisArg Value of 'this' used to invoke the mapfn.
+      */
+    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Uint8Array;
+
+}
+declare const Uint8Array: Uint8ArrayConstructor;
+
+/**
+  * A typed array of 8-bit unsigned integer (clamped) values. The contents are initialized to 0.
+  * If the requested number of bytes could not be allocated an exception is raised.
+  */
+interface Uint8ClampedArray {
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * The ArrayBuffer instance referenced by the array.
+      */
+    readonly buffer: ArrayBufferLike;
+
+    /**
+      * The length in bytes of the array.
+      */
+    readonly byteLength: number;
+
+    /**
+      * The offset in bytes of the array.
+      */
+    readonly byteOffset: number;
+
+    /**
+      * Returns the this object after copying a section of the array identified by start and end
+      * to the same array starting at position target
+      * @param target If target is negative, it is treated as length+target where length is the
+      * length of the array.
+      * @param start If start is negative, it is treated as length+start. If end is negative, it
+      * is treated as length+end.
+      * @param end If not specified, length of the this object is used as its default value.
+      */
+    copyWithin(target: number, start: number, end?: number): this;
+
+    /**
+      * Determines whether all the members of an array satisfy the specified test.
+      * @param callbackfn A function that accepts up to three arguments. The every method calls
+      * the callbackfn function for each element in array1 until the callbackfn returns false,
+      * or until the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    every(callbackfn: (value: number, index: number, array: Uint8ClampedArray) => boolean, thisArg?: any): boolean;
+
+    /**
+        * Returns the this object after filling the section identified by start and end with value
+        * @param value value to fill array section with
+        * @param start index to start filling the array at. If start is negative, it is treated as
+        * length+start where length is the length of the array.
+        * @param end index to stop filling the array at. If end is negative, it is treated as
+        * length+end.
+        */
+    fill(value: number, start?: number, end?: number): this;
+
+    /**
+      * Returns the elements of an array that meet the condition specified in a callback function.
+      * @param callbackfn A function that accepts up to three arguments. The filter method calls
+      * the callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    filter(callbackfn: (value: number, index: number, array: Uint8ClampedArray) => any, thisArg?: any): Uint8ClampedArray;
+
+    /**
+      * Returns the value of the first element in the array where predicate is true, and undefined
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found, find
+      * immediately returns that element value. Otherwise, find returns undefined.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
+
+    /**
+      * Returns the index of the first element in the array where predicate is true, and -1
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found,
+      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
+
+    /**
+      * Performs the specified action for each element in an array.
+      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    forEach(callbackfn: (value: number, index: number, array: Uint8ClampedArray) => void, thisArg?: any): void;
+
+    /**
+      * Returns the index of the first occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      *  search starts at index 0.
+      */
+    indexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * Adds all the elements of an array separated by the specified separator string.
+      * @param separator A string used to separate one element of an array from the next in the
+      * resulting String. If omitted, the array elements are separated with a comma.
+      */
+    join(separator?: string): string;
+
+    /**
+      * Returns the index of the last occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      * search starts at index 0.
+      */
+    lastIndexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * The length of the array.
+      */
+    readonly length: number;
+
+    /**
+      * Calls a defined callback function on each element of an array, and returns an array that
+      * contains the results.
+      * @param callbackfn A function that accepts up to three arguments. The map method calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    map(callbackfn: (this: void, value: number, index: number, array: Uint8ClampedArray) => number, thisArg?: any): Uint8ClampedArray;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Uint8ClampedArray) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Uint8ClampedArray) => U, initialValue: U): U;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an
+      * argument instead of an array value.
+      */
+    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Uint8ClampedArray) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Uint8ClampedArray) => U, initialValue: U): U;
+
+    /**
+      * Reverses the elements in an Array.
+      */
+    reverse(): Uint8ClampedArray;
+
+    /**
+      * Sets a value or an array of values.
+      * @param array A typed or untyped array of values to set.
+      * @param offset The index in the current array at which the values are to be written.
+      */
+    set(array: ArrayLike<number>, offset?: number): void;
+
+    /**
+      * Returns a section of an array.
+      * @param start The beginning of the specified portion of the array.
+      * @param end The end of the specified portion of the array.
+      */
+    slice(start?: number, end?: number): Uint8ClampedArray;
+
+    /**
+      * Determines whether the specified callback function returns true for any element of an array.
+      * @param callbackfn A function that accepts up to three arguments. The some method calls the
+      * callbackfn function for each element in array1 until the callbackfn returns true, or until
+      * the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    some(callbackfn: (value: number, index: number, array: Uint8ClampedArray) => boolean, thisArg?: any): boolean;
+
+    /**
+      * Sorts an array.
+      * @param compareFn The name of the function used to determine the order of the elements. If
+      * omitted, the elements are sorted in ascending, ASCII character order.
+      */
+    sort(compareFn?: (a: number, b: number) => number): this;
+
+    /**
+      * Gets a new Uint8ClampedArray view of the ArrayBuffer store for this array, referencing the elements
+      * at begin, inclusive, up to end, exclusive.
+      * @param begin The index of the beginning of the array.
+      * @param end The index of the end of the array.
+      */
+    subarray(begin: number, end?: number): Uint8ClampedArray;
+
+    /**
+      * Converts a number to a string by using the current locale.
+      */
+    toLocaleString(): string;
+
+    /**
+      * Returns a string representation of an array.
+      */
+    toString(): string;
+
+    [index: number]: number;
+}
+
+interface Uint8ClampedArrayConstructor {
+    readonly prototype: Uint8ClampedArray;
+    new(length: number): Uint8ClampedArray;
+    new(array: ArrayLike<number>): Uint8ClampedArray;
+    new(buffer: ArrayBufferLike, byteOffset?: number, length?: number): Uint8ClampedArray;
+
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * Returns a new array from a set of elements.
+      * @param items A set of elements to include in the new array object.
+      */
+    of(...items: number[]): Uint8ClampedArray;
+
+    /**
+      * Creates an array from an array-like or iterable object.
+      * @param arrayLike An array-like or iterable object to convert to an array.
+      * @param mapfn A mapping function to call on every element of the array.
+      * @param thisArg Value of 'this' used to invoke the mapfn.
+      */
+    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Uint8ClampedArray;
+}
+declare const Uint8ClampedArray: Uint8ClampedArrayConstructor;
+
+/**
+  * A typed array of 16-bit signed integer values. The contents are initialized to 0. If the
+  * requested number of bytes could not be allocated an exception is raised.
+  */
+interface Int16Array {
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * The ArrayBuffer instance referenced by the array.
+      */
+    readonly buffer: ArrayBufferLike;
+
+    /**
+      * The length in bytes of the array.
+      */
+    readonly byteLength: number;
+
+    /**
+      * The offset in bytes of the array.
+      */
+    readonly byteOffset: number;
+
+    /**
+      * Returns the this object after copying a section of the array identified by start and end
+      * to the same array starting at position target
+      * @param target If target is negative, it is treated as length+target where length is the
+      * length of the array.
+      * @param start If start is negative, it is treated as length+start. If end is negative, it
+      * is treated as length+end.
+      * @param end If not specified, length of the this object is used as its default value.
+      */
+    copyWithin(target: number, start: number, end?: number): this;
+
+    /**
+      * Determines whether all the members of an array satisfy the specified test.
+      * @param callbackfn A function that accepts up to three arguments. The every method calls
+      * the callbackfn function for each element in array1 until the callbackfn returns false,
+      * or until the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    every(callbackfn: (value: number, index: number, array: Int16Array) => boolean, thisArg?: any): boolean;
+
+    /**
+        * Returns the this object after filling the section identified by start and end with value
+        * @param value value to fill array section with
+        * @param start index to start filling the array at. If start is negative, it is treated as
+        * length+start where length is the length of the array.
+        * @param end index to stop filling the array at. If end is negative, it is treated as
+        * length+end.
+        */
+    fill(value: number, start?: number, end?: number): this;
+
+    /**
+      * Returns the elements of an array that meet the condition specified in a callback function.
+      * @param callbackfn A function that accepts up to three arguments. The filter method calls
+      * the callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    filter(callbackfn: (this: void, value: number, index: number, array: Int16Array) => any, thisArg?: any): Int16Array;
+
+    /**
+      * Returns the value of the first element in the array where predicate is true, and undefined
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found, find
+      * immediately returns that element value. Otherwise, find returns undefined.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
+
+    /**
+      * Returns the index of the first element in the array where predicate is true, and -1
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found,
+      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
+
+    /**
+      * Performs the specified action for each element in an array.
+      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    forEach(callbackfn: (value: number, index: number, array: Int16Array) => void, thisArg?: any): void;
+    /**
+      * Returns the index of the first occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      *  search starts at index 0.
+      */
+    indexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * Adds all the elements of an array separated by the specified separator string.
+      * @param separator A string used to separate one element of an array from the next in the
+      * resulting String. If omitted, the array elements are separated with a comma.
+      */
+    join(separator?: string): string;
+
+    /**
+      * Returns the index of the last occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      * search starts at index 0.
+      */
+    lastIndexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * The length of the array.
+      */
+    readonly length: number;
+
+    /**
+      * Calls a defined callback function on each element of an array, and returns an array that
+      * contains the results.
+      * @param callbackfn A function that accepts up to three arguments. The map method calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    map(callbackfn: (this: void, value: number, index: number, array: Int16Array) => number, thisArg?: any): Int16Array;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Int16Array) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Int16Array) => U, initialValue: U): U;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an
+      * argument instead of an array value.
+      */
+    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Int16Array) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Int16Array) => U, initialValue: U): U;
+
+    /**
+      * Reverses the elements in an Array.
+      */
+    reverse(): Int16Array;
+
+    /**
+      * Sets a value or an array of values.
+      * @param array A typed or untyped array of values to set.
+      * @param offset The index in the current array at which the values are to be written.
+      */
+    set(array: ArrayLike<number>, offset?: number): void;
+
+    /**
+      * Returns a section of an array.
+      * @param start The beginning of the specified portion of the array.
+      * @param end The end of the specified portion of the array.
+      */
+    slice(start?: number, end?: number): Int16Array;
+
+    /**
+      * Determines whether the specified callback function returns true for any element of an array.
+      * @param callbackfn A function that accepts up to three arguments. The some method calls the
+      * callbackfn function for each element in array1 until the callbackfn returns true, or until
+      * the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    some(callbackfn: (value: number, index: number, array: Int16Array) => boolean, thisArg?: any): boolean;
+
+    /**
+      * Sorts an array.
+      * @param compareFn The name of the function used to determine the order of the elements. If
+      * omitted, the elements are sorted in ascending, ASCII character order.
+      */
+    sort(compareFn?: (a: number, b: number) => number): this;
+
+    /**
+      * Gets a new Int16Array view of the ArrayBuffer store for this array, referencing the elements
+      * at begin, inclusive, up to end, exclusive.
+      * @param begin The index of the beginning of the array.
+      * @param end The index of the end of the array.
+      */
+    subarray(begin: number, end?: number): Int16Array;
+
+    /**
+      * Converts a number to a string by using the current locale.
+      */
+    toLocaleString(): string;
+
+    /**
+      * Returns a string representation of an array.
+      */
+    toString(): string;
+
+    [index: number]: number;
+}
+
+interface Int16ArrayConstructor {
+    readonly prototype: Int16Array;
+    new(length: number): Int16Array;
+    new(array: ArrayLike<number>): Int16Array;
+    new(buffer: ArrayBufferLike, byteOffset?: number, length?: number): Int16Array;
+
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * Returns a new array from a set of elements.
+      * @param items A set of elements to include in the new array object.
+      */
+    of(...items: number[]): Int16Array;
+
+    /**
+      * Creates an array from an array-like or iterable object.
+      * @param arrayLike An array-like or iterable object to convert to an array.
+      * @param mapfn A mapping function to call on every element of the array.
+      * @param thisArg Value of 'this' used to invoke the mapfn.
+      */
+    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Int16Array;
+
+
+}
+declare const Int16Array: Int16ArrayConstructor;
+
+/**
+  * A typed array of 16-bit unsigned integer values. The contents are initialized to 0. If the
+  * requested number of bytes could not be allocated an exception is raised.
+  */
+interface Uint16Array {
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * The ArrayBuffer instance referenced by the array.
+      */
+    readonly buffer: ArrayBufferLike;
+
+    /**
+      * The length in bytes of the array.
+      */
+    readonly byteLength: number;
+
+    /**
+      * The offset in bytes of the array.
+      */
+    readonly byteOffset: number;
+
+    /**
+      * Returns the this object after copying a section of the array identified by start and end
+      * to the same array starting at position target
+      * @param target If target is negative, it is treated as length+target where length is the
+      * length of the array.
+      * @param start If start is negative, it is treated as length+start. If end is negative, it
+      * is treated as length+end.
+      * @param end If not specified, length of the this object is used as its default value.
+      */
+    copyWithin(target: number, start: number, end?: number): this;
+
+    /**
+      * Determines whether all the members of an array satisfy the specified test.
+      * @param callbackfn A function that accepts up to three arguments. The every method calls
+      * the callbackfn function for each element in array1 until the callbackfn returns false,
+      * or until the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    every(callbackfn: (value: number, index: number, array: Uint16Array) => boolean, thisArg?: any): boolean;
+
+    /**
+        * Returns the this object after filling the section identified by start and end with value
+        * @param value value to fill array section with
+        * @param start index to start filling the array at. If start is negative, it is treated as
+        * length+start where length is the length of the array.
+        * @param end index to stop filling the array at. If end is negative, it is treated as
+        * length+end.
+        */
+    fill(value: number, start?: number, end?: number): this;
+
+    /**
+      * Returns the elements of an array that meet the condition specified in a callback function.
+      * @param callbackfn A function that accepts up to three arguments. The filter method calls
+      * the callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    filter(callbackfn: (value: number, index: number, array: Uint16Array) => any, thisArg?: any): Uint16Array;
+
+    /**
+      * Returns the value of the first element in the array where predicate is true, and undefined
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found, find
+      * immediately returns that element value. Otherwise, find returns undefined.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
+
+    /**
+      * Returns the index of the first element in the array where predicate is true, and -1
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found,
+      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
+
+    /**
+      * Performs the specified action for each element in an array.
+      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    forEach(callbackfn: (value: number, index: number, array: Uint16Array) => void, thisArg?: any): void;
+
+    /**
+      * Returns the index of the first occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      *  search starts at index 0.
+      */
+    indexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * Adds all the elements of an array separated by the specified separator string.
+      * @param separator A string used to separate one element of an array from the next in the
+      * resulting String. If omitted, the array elements are separated with a comma.
+      */
+    join(separator?: string): string;
+
+    /**
+      * Returns the index of the last occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      * search starts at index 0.
+      */
+    lastIndexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * The length of the array.
+      */
+    readonly length: number;
+
+    /**
+      * Calls a defined callback function on each element of an array, and returns an array that
+      * contains the results.
+      * @param callbackfn A function that accepts up to three arguments. The map method calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    map(callbackfn: (this: void, value: number, index: number, array: Uint16Array) => number, thisArg?: any): Uint16Array;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Uint16Array) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Uint16Array) => U, initialValue: U): U;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an
+      * argument instead of an array value.
+      */
+    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Uint16Array) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Uint16Array) => U, initialValue: U): U;
+
+    /**
+      * Reverses the elements in an Array.
+      */
+    reverse(): Uint16Array;
+
+    /**
+      * Sets a value or an array of values.
+      * @param array A typed or untyped array of values to set.
+      * @param offset The index in the current array at which the values are to be written.
+      */
+    set(array: ArrayLike<number>, offset?: number): void;
+
+    /**
+      * Returns a section of an array.
+      * @param start The beginning of the specified portion of the array.
+      * @param end The end of the specified portion of the array.
+      */
+    slice(start?: number, end?: number): Uint16Array;
+
+    /**
+      * Determines whether the specified callback function returns true for any element of an array.
+      * @param callbackfn A function that accepts up to three arguments. The some method calls the
+      * callbackfn function for each element in array1 until the callbackfn returns true, or until
+      * the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    some(callbackfn: (value: number, index: number, array: Uint16Array) => boolean, thisArg?: any): boolean;
+
+    /**
+      * Sorts an array.
+      * @param compareFn The name of the function used to determine the order of the elements. If
+      * omitted, the elements are sorted in ascending, ASCII character order.
+      */
+    sort(compareFn?: (a: number, b: number) => number): this;
+
+    /**
+      * Gets a new Uint16Array view of the ArrayBuffer store for this array, referencing the elements
+      * at begin, inclusive, up to end, exclusive.
+      * @param begin The index of the beginning of the array.
+      * @param end The index of the end of the array.
+      */
+    subarray(begin: number, end?: number): Uint16Array;
+
+    /**
+      * Converts a number to a string by using the current locale.
+      */
+    toLocaleString(): string;
+
+    /**
+      * Returns a string representation of an array.
+      */
+    toString(): string;
+
+    [index: number]: number;
+}
+
+interface Uint16ArrayConstructor {
+    readonly prototype: Uint16Array;
+    new(length: number): Uint16Array;
+    new(array: ArrayLike<number>): Uint16Array;
+    new(buffer: ArrayBufferLike, byteOffset?: number, length?: number): Uint16Array;
+
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * Returns a new array from a set of elements.
+      * @param items A set of elements to include in the new array object.
+      */
+    of(...items: number[]): Uint16Array;
+
+    /**
+      * Creates an array from an array-like or iterable object.
+      * @param arrayLike An array-like or iterable object to convert to an array.
+      * @param mapfn A mapping function to call on every element of the array.
+      * @param thisArg Value of 'this' used to invoke the mapfn.
+      */
+    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Uint16Array;
+
+
+}
+declare const Uint16Array: Uint16ArrayConstructor;
+/**
+  * A typed array of 32-bit signed integer values. The contents are initialized to 0. If the
+  * requested number of bytes could not be allocated an exception is raised.
+  */
+interface Int32Array {
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * The ArrayBuffer instance referenced by the array.
+      */
+    readonly buffer: ArrayBufferLike;
+
+    /**
+      * The length in bytes of the array.
+      */
+    readonly byteLength: number;
+
+    /**
+      * The offset in bytes of the array.
+      */
+    readonly byteOffset: number;
+
+    /**
+      * Returns the this object after copying a section of the array identified by start and end
+      * to the same array starting at position target
+      * @param target If target is negative, it is treated as length+target where length is the
+      * length of the array.
+      * @param start If start is negative, it is treated as length+start. If end is negative, it
+      * is treated as length+end.
+      * @param end If not specified, length of the this object is used as its default value.
+      */
+    copyWithin(target: number, start: number, end?: number): this;
+
+    /**
+      * Determines whether all the members of an array satisfy the specified test.
+      * @param callbackfn A function that accepts up to three arguments. The every method calls
+      * the callbackfn function for each element in array1 until the callbackfn returns false,
+      * or until the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    every(callbackfn: (value: number, index: number, array: Int32Array) => boolean, thisArg?: any): boolean;
+
+    /**
+        * Returns the this object after filling the section identified by start and end with value
+        * @param value value to fill array section with
+        * @param start index to start filling the array at. If start is negative, it is treated as
+        * length+start where length is the length of the array.
+        * @param end index to stop filling the array at. If end is negative, it is treated as
+        * length+end.
+        */
+    fill(value: number, start?: number, end?: number): this;
+
+    /**
+      * Returns the elements of an array that meet the condition specified in a callback function.
+      * @param callbackfn A function that accepts up to three arguments. The filter method calls
+      * the callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    filter(callbackfn: (value: number, index: number, array: Int32Array) => any, thisArg?: any): Int32Array;
+
+    /**
+      * Returns the value of the first element in the array where predicate is true, and undefined
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found, find
+      * immediately returns that element value. Otherwise, find returns undefined.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
+
+    /**
+      * Returns the index of the first element in the array where predicate is true, and -1
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found,
+      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
+
+    /**
+      * Performs the specified action for each element in an array.
+      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    forEach(callbackfn: (value: number, index: number, array: Int32Array) => void, thisArg?: any): void;
+
+    /**
+      * Returns the index of the first occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      *  search starts at index 0.
+      */
+    indexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * Adds all the elements of an array separated by the specified separator string.
+      * @param separator A string used to separate one element of an array from the next in the
+      * resulting String. If omitted, the array elements are separated with a comma.
+      */
+    join(separator?: string): string;
+
+    /**
+      * Returns the index of the last occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      * search starts at index 0.
+      */
+    lastIndexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * The length of the array.
+      */
+    readonly length: number;
+
+    /**
+      * Calls a defined callback function on each element of an array, and returns an array that
+      * contains the results.
+      * @param callbackfn A function that accepts up to three arguments. The map method calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    map(callbackfn: (value: number, index: number, array: Int32Array) => number, thisArg?: any): Int32Array;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Int32Array) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Int32Array) => U, initialValue: U): U;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an
+      * argument instead of an array value.
+      */
+    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Int32Array) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Int32Array) => U, initialValue: U): U;
+
+    /**
+      * Reverses the elements in an Array.
+      */
+    reverse(): Int32Array;
+
+    /**
+      * Sets a value or an array of values.
+      * @param array A typed or untyped array of values to set.
+      * @param offset The index in the current array at which the values are to be written.
+      */
+    set(array: ArrayLike<number>, offset?: number): void;
+
+    /**
+      * Returns a section of an array.
+      * @param start The beginning of the specified portion of the array.
+      * @param end The end of the specified portion of the array.
+      */
+    slice(start?: number, end?: number): Int32Array;
+
+    /**
+      * Determines whether the specified callback function returns true for any element of an array.
+      * @param callbackfn A function that accepts up to three arguments. The some method calls the
+      * callbackfn function for each element in array1 until the callbackfn returns true, or until
+      * the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    some(callbackfn: (value: number, index: number, array: Int32Array) => boolean, thisArg?: any): boolean;
+
+    /**
+      * Sorts an array.
+      * @param compareFn The name of the function used to determine the order of the elements. If
+      * omitted, the elements are sorted in ascending, ASCII character order.
+      */
+    sort(compareFn?: (a: number, b: number) => number): this;
+
+    /**
+      * Gets a new Int32Array view of the ArrayBuffer store for this array, referencing the elements
+      * at begin, inclusive, up to end, exclusive.
+      * @param begin The index of the beginning of the array.
+      * @param end The index of the end of the array.
+      */
+    subarray(begin: number, end?: number): Int32Array;
+
+    /**
+      * Converts a number to a string by using the current locale.
+      */
+    toLocaleString(): string;
+
+    /**
+      * Returns a string representation of an array.
+      */
+    toString(): string;
+
+    [index: number]: number;
+}
+
+interface Int32ArrayConstructor {
+    readonly prototype: Int32Array;
+    new(length: number): Int32Array;
+    new(array: ArrayLike<number>): Int32Array;
+    new(buffer: ArrayBufferLike, byteOffset?: number, length?: number): Int32Array;
+
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * Returns a new array from a set of elements.
+      * @param items A set of elements to include in the new array object.
+      */
+    of(...items: number[]): Int32Array;
+
+    /**
+      * Creates an array from an array-like or iterable object.
+      * @param arrayLike An array-like or iterable object to convert to an array.
+      * @param mapfn A mapping function to call on every element of the array.
+      * @param thisArg Value of 'this' used to invoke the mapfn.
+      */
+    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Int32Array;
+
+}
+declare const Int32Array: Int32ArrayConstructor;
+
+/**
+  * A typed array of 32-bit unsigned integer values. The contents are initialized to 0. If the
+  * requested number of bytes could not be allocated an exception is raised.
+  */
+interface Uint32Array {
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * The ArrayBuffer instance referenced by the array.
+      */
+    readonly buffer: ArrayBufferLike;
+
+    /**
+      * The length in bytes of the array.
+      */
+    readonly byteLength: number;
+
+    /**
+      * The offset in bytes of the array.
+      */
+    readonly byteOffset: number;
+
+    /**
+      * Returns the this object after copying a section of the array identified by start and end
+      * to the same array starting at position target
+      * @param target If target is negative, it is treated as length+target where length is the
+      * length of the array.
+      * @param start If start is negative, it is treated as length+start. If end is negative, it
+      * is treated as length+end.
+      * @param end If not specified, length of the this object is used as its default value.
+      */
+    copyWithin(target: number, start: number, end?: number): this;
+
+    /**
+      * Determines whether all the members of an array satisfy the specified test.
+      * @param callbackfn A function that accepts up to three arguments. The every method calls
+      * the callbackfn function for each element in array1 until the callbackfn returns false,
+      * or until the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    every(callbackfn: (value: number, index: number, array: Uint32Array) => boolean, thisArg?: any): boolean;
+
+    /**
+        * Returns the this object after filling the section identified by start and end with value
+        * @param value value to fill array section with
+        * @param start index to start filling the array at. If start is negative, it is treated as
+        * length+start where length is the length of the array.
+        * @param end index to stop filling the array at. If end is negative, it is treated as
+        * length+end.
+        */
+    fill(value: number, start?: number, end?: number): this;
+
+    /**
+      * Returns the elements of an array that meet the condition specified in a callback function.
+      * @param callbackfn A function that accepts up to three arguments. The filter method calls
+      * the callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    filter(callbackfn: (value: number, index: number, array: Uint32Array) => any, thisArg?: any): Uint32Array;
+
+    /**
+      * Returns the value of the first element in the array where predicate is true, and undefined
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found, find
+      * immediately returns that element value. Otherwise, find returns undefined.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
+
+    /**
+      * Returns the index of the first element in the array where predicate is true, and -1
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found,
+      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
+
+    /**
+      * Performs the specified action for each element in an array.
+      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    forEach(callbackfn: (value: number, index: number, array: Uint32Array) => void, thisArg?: any): void;
+    /**
+      * Returns the index of the first occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      *  search starts at index 0.
+      */
+    indexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * Adds all the elements of an array separated by the specified separator string.
+      * @param separator A string used to separate one element of an array from the next in the
+      * resulting String. If omitted, the array elements are separated with a comma.
+      */
+    join(separator?: string): string;
+
+    /**
+      * Returns the index of the last occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      * search starts at index 0.
+      */
+    lastIndexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * The length of the array.
+      */
+    readonly length: number;
+
+    /**
+      * Calls a defined callback function on each element of an array, and returns an array that
+      * contains the results.
+      * @param callbackfn A function that accepts up to three arguments. The map method calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    map(callbackfn: (this: void, value: number, index: number, array: Uint32Array) => number, thisArg?: any): Uint32Array;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Uint32Array) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Uint32Array) => U, initialValue: U): U;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an
+      * argument instead of an array value.
+      */
+    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Uint32Array) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Uint32Array) => U, initialValue: U): U;
+
+    /**
+      * Reverses the elements in an Array.
+      */
+    reverse(): Uint32Array;
+
+    /**
+      * Sets a value or an array of values.
+      * @param array A typed or untyped array of values to set.
+      * @param offset The index in the current array at which the values are to be written.
+      */
+    set(array: ArrayLike<number>, offset?: number): void;
+
+    /**
+      * Returns a section of an array.
+      * @param start The beginning of the specified portion of the array.
+      * @param end The end of the specified portion of the array.
+      */
+    slice(start?: number, end?: number): Uint32Array;
+
+    /**
+      * Determines whether the specified callback function returns true for any element of an array.
+      * @param callbackfn A function that accepts up to three arguments. The some method calls the
+      * callbackfn function for each element in array1 until the callbackfn returns true, or until
+      * the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    some(callbackfn: (value: number, index: number, array: Uint32Array) => boolean, thisArg?: any): boolean;
+
+    /**
+      * Sorts an array.
+      * @param compareFn The name of the function used to determine the order of the elements. If
+      * omitted, the elements are sorted in ascending, ASCII character order.
+      */
+    sort(compareFn?: (a: number, b: number) => number): this;
+
+    /**
+      * Gets a new Uint32Array view of the ArrayBuffer store for this array, referencing the elements
+      * at begin, inclusive, up to end, exclusive.
+      * @param begin The index of the beginning of the array.
+      * @param end The index of the end of the array.
+      */
+    subarray(begin: number, end?: number): Uint32Array;
+
+    /**
+      * Converts a number to a string by using the current locale.
+      */
+    toLocaleString(): string;
+
+    /**
+      * Returns a string representation of an array.
+      */
+    toString(): string;
+
+    [index: number]: number;
+}
+
+interface Uint32ArrayConstructor {
+    readonly prototype: Uint32Array;
+    new(length: number): Uint32Array;
+    new(array: ArrayLike<number>): Uint32Array;
+    new(buffer: ArrayBufferLike, byteOffset?: number, length?: number): Uint32Array;
+
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * Returns a new array from a set of elements.
+      * @param items A set of elements to include in the new array object.
+      */
+    of(...items: number[]): Uint32Array;
+
+    /**
+      * Creates an array from an array-like or iterable object.
+      * @param arrayLike An array-like or iterable object to convert to an array.
+      * @param mapfn A mapping function to call on every element of the array.
+      * @param thisArg Value of 'this' used to invoke the mapfn.
+      */
+    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Uint32Array;
+
+}
+declare const Uint32Array: Uint32ArrayConstructor;
+
+/**
+  * A typed array of 32-bit float values. The contents are initialized to 0. If the requested number
+  * of bytes could not be allocated an exception is raised.
+  */
+interface Float32Array {
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * The ArrayBuffer instance referenced by the array.
+      */
+    readonly buffer: ArrayBufferLike;
+
+    /**
+      * The length in bytes of the array.
+      */
+    readonly byteLength: number;
+
+    /**
+      * The offset in bytes of the array.
+      */
+    readonly byteOffset: number;
+
+    /**
+      * Returns the this object after copying a section of the array identified by start and end
+      * to the same array starting at position target
+      * @param target If target is negative, it is treated as length+target where length is the
+      * length of the array.
+      * @param start If start is negative, it is treated as length+start. If end is negative, it
+      * is treated as length+end.
+      * @param end If not specified, length of the this object is used as its default value.
+      */
+    copyWithin(target: number, start: number, end?: number): this;
+
+    /**
+      * Determines whether all the members of an array satisfy the specified test.
+      * @param callbackfn A function that accepts up to three arguments. The every method calls
+      * the callbackfn function for each element in array1 until the callbackfn returns false,
+      * or until the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    every(callbackfn: (value: number, index: number, array: Float32Array) => boolean, thisArg?: any): boolean;
+
+    /**
+        * Returns the this object after filling the section identified by start and end with value
+        * @param value value to fill array section with
+        * @param start index to start filling the array at. If start is negative, it is treated as
+        * length+start where length is the length of the array.
+        * @param end index to stop filling the array at. If end is negative, it is treated as
+        * length+end.
+        */
+    fill(value: number, start?: number, end?: number): this;
+
+    /**
+      * Returns the elements of an array that meet the condition specified in a callback function.
+      * @param callbackfn A function that accepts up to three arguments. The filter method calls
+      * the callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    filter(callbackfn: (value: number, index: number, array: Float32Array) => any, thisArg?: any): Float32Array;
+
+    /**
+      * Returns the value of the first element in the array where predicate is true, and undefined
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found, find
+      * immediately returns that element value. Otherwise, find returns undefined.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
+
+    /**
+      * Returns the index of the first element in the array where predicate is true, and -1
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found,
+      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
+
+    /**
+      * Performs the specified action for each element in an array.
+      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    forEach(callbackfn: (value: number, index: number, array: Float32Array) => void, thisArg?: any): void;
+
+    /**
+      * Returns the index of the first occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      *  search starts at index 0.
+      */
+    indexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * Adds all the elements of an array separated by the specified separator string.
+      * @param separator A string used to separate one element of an array from the next in the
+      * resulting String. If omitted, the array elements are separated with a comma.
+      */
+    join(separator?: string): string;
+
+    /**
+      * Returns the index of the last occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      * search starts at index 0.
+      */
+    lastIndexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * The length of the array.
+      */
+    readonly length: number;
+
+    /**
+      * Calls a defined callback function on each element of an array, and returns an array that
+      * contains the results.
+      * @param callbackfn A function that accepts up to three arguments. The map method calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    map(callbackfn: (this: void, value: number, index: number, array: Float32Array) => number, thisArg?: any): Float32Array;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Float32Array) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Float32Array) => U, initialValue: U): U;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an
+      * argument instead of an array value.
+      */
+    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Float32Array) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Float32Array) => U, initialValue: U): U;
+
+    /**
+      * Reverses the elements in an Array.
+      */
+    reverse(): Float32Array;
+
+    /**
+      * Sets a value or an array of values.
+      * @param array A typed or untyped array of values to set.
+      * @param offset The index in the current array at which the values are to be written.
+      */
+    set(array: ArrayLike<number>, offset?: number): void;
+
+    /**
+      * Returns a section of an array.
+      * @param start The beginning of the specified portion of the array.
+      * @param end The end of the specified portion of the array.
+      */
+    slice(start?: number, end?: number): Float32Array;
+
+    /**
+      * Determines whether the specified callback function returns true for any element of an array.
+      * @param callbackfn A function that accepts up to three arguments. The some method calls the
+      * callbackfn function for each element in array1 until the callbackfn returns true, or until
+      * the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    some(callbackfn: (value: number, index: number, array: Float32Array) => boolean, thisArg?: any): boolean;
+
+    /**
+      * Sorts an array.
+      * @param compareFn The name of the function used to determine the order of the elements. If
+      * omitted, the elements are sorted in ascending, ASCII character order.
+      */
+    sort(compareFn?: (a: number, b: number) => number): this;
+
+    /**
+      * Gets a new Float32Array view of the ArrayBuffer store for this array, referencing the elements
+      * at begin, inclusive, up to end, exclusive.
+      * @param begin The index of the beginning of the array.
+      * @param end The index of the end of the array.
+      */
+    subarray(begin: number, end?: number): Float32Array;
+
+    /**
+      * Converts a number to a string by using the current locale.
+      */
+    toLocaleString(): string;
+
+    /**
+      * Returns a string representation of an array.
+      */
+    toString(): string;
+
+    [index: number]: number;
+}
+
+interface Float32ArrayConstructor {
+    readonly prototype: Float32Array;
+    new(length: number): Float32Array;
+    new(array: ArrayLike<number>): Float32Array;
+    new(buffer: ArrayBufferLike, byteOffset?: number, length?: number): Float32Array;
+
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * Returns a new array from a set of elements.
+      * @param items A set of elements to include in the new array object.
+      */
+    of(...items: number[]): Float32Array;
+
+    /**
+      * Creates an array from an array-like or iterable object.
+      * @param arrayLike An array-like or iterable object to convert to an array.
+      * @param mapfn A mapping function to call on every element of the array.
+      * @param thisArg Value of 'this' used to invoke the mapfn.
+      */
+    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Float32Array;
+
+
+}
+declare const Float32Array: Float32ArrayConstructor;
+
+/**
+  * A typed array of 64-bit float values. The contents are initialized to 0. If the requested
+  * number of bytes could not be allocated an exception is raised.
+  */
+interface Float64Array {
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * The ArrayBuffer instance referenced by the array.
+      */
+    readonly buffer: ArrayBufferLike;
+
+    /**
+      * The length in bytes of the array.
+      */
+    readonly byteLength: number;
+
+    /**
+      * The offset in bytes of the array.
+      */
+    readonly byteOffset: number;
+
+    /**
+      * Returns the this object after copying a section of the array identified by start and end
+      * to the same array starting at position target
+      * @param target If target is negative, it is treated as length+target where length is the
+      * length of the array.
+      * @param start If start is negative, it is treated as length+start. If end is negative, it
+      * is treated as length+end.
+      * @param end If not specified, length of the this object is used as its default value.
+      */
+    copyWithin(target: number, start: number, end?: number): this;
+
+    /**
+      * Determines whether all the members of an array satisfy the specified test.
+      * @param callbackfn A function that accepts up to three arguments. The every method calls
+      * the callbackfn function for each element in array1 until the callbackfn returns false,
+      * or until the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    every(callbackfn: (value: number, index: number, array: Float64Array) => boolean, thisArg?: any): boolean;
+
+    /**
+        * Returns the this object after filling the section identified by start and end with value
+        * @param value value to fill array section with
+        * @param start index to start filling the array at. If start is negative, it is treated as
+        * length+start where length is the length of the array.
+        * @param end index to stop filling the array at. If end is negative, it is treated as
+        * length+end.
+        */
+    fill(value: number, start?: number, end?: number): this;
+
+    /**
+      * Returns the elements of an array that meet the condition specified in a callback function.
+      * @param callbackfn A function that accepts up to three arguments. The filter method calls
+      * the callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    filter(callbackfn: (value: number, index: number, array: Float64Array) => any, thisArg?: any): Float64Array;
+
+    /**
+      * Returns the value of the first element in the array where predicate is true, and undefined
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found, find
+      * immediately returns that element value. Otherwise, find returns undefined.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
+
+    /**
+      * Returns the index of the first element in the array where predicate is true, and -1
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found,
+      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
+
+    /**
+      * Performs the specified action for each element in an array.
+      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    forEach(callbackfn: (value: number, index: number, array: Float64Array) => void, thisArg?: any): void;
+
+    /**
+      * Returns the index of the first occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      *  search starts at index 0.
+      */
+    indexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * Adds all the elements of an array separated by the specified separator string.
+      * @param separator A string used to separate one element of an array from the next in the
+      * resulting String. If omitted, the array elements are separated with a comma.
+      */
+    join(separator?: string): string;
+
+    /**
+      * Returns the index of the last occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      * search starts at index 0.
+      */
+    lastIndexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * The length of the array.
+      */
+    readonly length: number;
+
+    /**
+      * Calls a defined callback function on each element of an array, and returns an array that
+      * contains the results.
+      * @param callbackfn A function that accepts up to three arguments. The map method calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    map(callbackfn: (this: void, value: number, index: number, array: Float64Array) => number, thisArg?: any): Float64Array;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Float64Array) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Float64Array) => U, initialValue: U): U;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an
+      * argument instead of an array value.
+      */
+    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Float64Array) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Float64Array) => U, initialValue: U): U;
+
+    /**
+      * Reverses the elements in an Array.
+      */
+    reverse(): Float64Array;
+
+    /**
+      * Sets a value or an array of values.
+      * @param array A typed or untyped array of values to set.
+      * @param offset The index in the current array at which the values are to be written.
+      */
+    set(array: ArrayLike<number>, offset?: number): void;
+
+    /**
+      * Returns a section of an array.
+      * @param start The beginning of the specified portion of the array.
+      * @param end The end of the specified portion of the array.
+      */
+    slice(start?: number, end?: number): Float64Array;
+
+    /**
+      * Determines whether the specified callback function returns true for any element of an array.
+      * @param callbackfn A function that accepts up to three arguments. The some method calls the
+      * callbackfn function for each element in array1 until the callbackfn returns true, or until
+      * the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    some(callbackfn: (value: number, index: number, array: Float64Array) => boolean, thisArg?: any): boolean;
+
+    /**
+      * Sorts an array.
+      * @param compareFn The name of the function used to determine the order of the elements. If
+      * omitted, the elements are sorted in ascending, ASCII character order.
+      */
+    sort(compareFn?: (a: number, b: number) => number): this;
+
+    /**
+      * Gets a new Float64Array view of the ArrayBuffer store for this array, referencing the elements
+      * at begin, inclusive, up to end, exclusive.
+      * @param begin The index of the beginning of the array.
+      * @param end The index of the end of the array.
+      */
+    subarray(begin: number, end?: number): Float64Array;
+
+    /**
+      * Converts a number to a string by using the current locale.
+      */
+    toLocaleString(): string;
+
+    /**
+      * Returns a string representation of an array.
+      */
+    toString(): string;
+
+    [index: number]: number;
+}
+
+interface Float64ArrayConstructor {
+    readonly prototype: Float64Array;
+    new(length: number): Float64Array;
+    new(array: ArrayLike<number>): Float64Array;
+    new(buffer: ArrayBufferLike, byteOffset?: number, length?: number): Float64Array;
+
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * Returns a new array from a set of elements.
+      * @param items A set of elements to include in the new array object.
+      */
+    of(...items: number[]): Float64Array;
+
+    /**
+      * Creates an array from an array-like or iterable object.
+      * @param arrayLike An array-like or iterable object to convert to an array.
+      * @param mapfn A mapping function to call on every element of the array.
+      * @param thisArg Value of 'this' used to invoke the mapfn.
+      */
+    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Float64Array;
+
+}
+declare const Float64Array: Float64ArrayConstructor;
+
+/////////////////////////////
+/// ECMAScript Internationalization API
+/////////////////////////////
+
+declare namespace Intl {
+    interface CollatorOptions {
+        usage?: string;
+        localeMatcher?: string;
+        numeric?: boolean;
+        caseFirst?: string;
+        sensitivity?: string;
+        ignorePunctuation?: boolean;
+    }
+
+    interface ResolvedCollatorOptions {
+        locale: string;
+        usage: string;
+        sensitivity: string;
+        ignorePunctuation: boolean;
+        collation: string;
+        caseFirst: string;
+        numeric: boolean;
+    }
+
+    interface Collator {
+        compare(x: string, y: string): number;
+        resolvedOptions(): ResolvedCollatorOptions;
+    }
+    var Collator: {
+        new(locales?: string | string[], options?: CollatorOptions): Collator;
+        (locales?: string | string[], options?: CollatorOptions): Collator;
+        supportedLocalesOf(locales: string | string[], options?: CollatorOptions): string[];
+    };
+
+    interface NumberFormatOptions {
+        localeMatcher?: string;
+        style?: string;
+        currency?: string;
+        currencyDisplay?: string;
+        useGrouping?: boolean;
+        minimumIntegerDigits?: number;
+        minimumFractionDigits?: number;
+        maximumFractionDigits?: number;
+        minimumSignificantDigits?: number;
+        maximumSignificantDigits?: number;
+    }
+
+    interface ResolvedNumberFormatOptions {
+        locale: string;
+        numberingSystem: string;
+        style: string;
+        currency?: string;
+        currencyDisplay?: string;
+        minimumIntegerDigits: number;
+        minimumFractionDigits: number;
+        maximumFractionDigits: number;
+        minimumSignificantDigits?: number;
+        maximumSignificantDigits?: number;
+        useGrouping: boolean;
+    }
+
+    interface NumberFormat {
+        format(value: number): string;
+        resolvedOptions(): ResolvedNumberFormatOptions;
+    }
+    var NumberFormat: {
+        new(locales?: string | string[], options?: NumberFormatOptions): NumberFormat;
+        (locales?: string | string[], options?: NumberFormatOptions): NumberFormat;
+        supportedLocalesOf(locales: string | string[], options?: NumberFormatOptions): string[];
+    };
+
+    interface DateTimeFormatOptions {
+        localeMatcher?: string;
+        weekday?: string;
+        era?: string;
+        year?: string;
+        month?: string;
+        day?: string;
+        hour?: string;
+        minute?: string;
+        second?: string;
+        timeZoneName?: string;
+        formatMatcher?: string;
+        hour12?: boolean;
+        timeZone?: string;
+    }
+
+    interface ResolvedDateTimeFormatOptions {
+        locale: string;
+        calendar: string;
+        numberingSystem: string;
+        timeZone: string;
+        hour12?: boolean;
+        weekday?: string;
+        era?: string;
+        year?: string;
+        month?: string;
+        day?: string;
+        hour?: string;
+        minute?: string;
+        second?: string;
+        timeZoneName?: string;
+    }
+
+    interface DateTimeFormat {
+        format(date?: Date | number): string;
+        resolvedOptions(): ResolvedDateTimeFormatOptions;
+    }
+    var DateTimeFormat: {
+        new(locales?: string | string[], options?: DateTimeFormatOptions): DateTimeFormat;
+        (locales?: string | string[], options?: DateTimeFormatOptions): DateTimeFormat;
+        supportedLocalesOf(locales: string | string[], options?: DateTimeFormatOptions): string[];
+    };
+}
+
+interface String {
+    /**
+      * Determines whether two strings are equivalent in the current or specified locale.
+      * @param that String to compare to target string
+      * @param locales A locale string or array of locale strings that contain one or more language or locale tags. If you include more than one locale string, list them in descending order of priority so that the first entry is the preferred locale. If you omit this parameter, the default locale of the JavaScript runtime is used. This parameter must conform to BCP 47 standards; see the Intl.Collator object for details.
+      * @param options An object that contains one or more properties that specify comparison options. see the Intl.Collator object for details.
+      */
+    localeCompare(that: string, locales?: string | string[], options?: Intl.CollatorOptions): number;
+}
+
+interface Number {
+    /**
+      * Converts a number to a string by using the current or specified locale.
+      * @param locales A locale string or array of locale strings that contain one or more language or locale tags. If you include more than one locale string, list them in descending order of priority so that the first entry is the preferred locale. If you omit this parameter, the default locale of the JavaScript runtime is used.
+      * @param options An object that contains one or more properties that specify comparison options.
+      */
+    toLocaleString(locales?: string | string[], options?: Intl.NumberFormatOptions): string;
+}
+
+interface Date {
+    /**
+      * Converts a date and time to a string by using the current or specified locale.
+      * @param locales A locale string or array of locale strings that contain one or more language or locale tags. If you include more than one locale string, list them in descending order of priority so that the first entry is the preferred locale. If you omit this parameter, the default locale of the JavaScript runtime is used.
+      * @param options An object that contains one or more properties that specify comparison options.
+      */
+    toLocaleString(locales?: string | string[], options?: Intl.DateTimeFormatOptions): string;
+    /**
+      * Converts a date to a string by using the current or specified locale.
+      * @param locales A locale string or array of locale strings that contain one or more language or locale tags. If you include more than one locale string, list them in descending order of priority so that the first entry is the preferred locale. If you omit this parameter, the default locale of the JavaScript runtime is used.
+      * @param options An object that contains one or more properties that specify comparison options.
+      */
+    toLocaleDateString(locales?: string | string[], options?: Intl.DateTimeFormatOptions): string;
+
+    /**
+      * Converts a time to a string by using the current or specified locale.
+      * @param locales A locale string or array of locale strings that contain one or more language or locale tags. If you include more than one locale string, list them in descending order of priority so that the first entry is the preferred locale. If you omit this parameter, the default locale of the JavaScript runtime is used.
+      * @param options An object that contains one or more properties that specify comparison options.
+      */
+    toLocaleTimeString(locales?: string | string[], options?: Intl.DateTimeFormatOptions): string;
+}
diff --git a/bin/lib.es6.d.ts b/bin/lib.es6.d.ts
index 23390a8..588c609 100644
--- a/bin/lib.es6.d.ts
+++ b/bin/lib.es6.d.ts
@@ -1,20760 +1,21101 @@
-/*! *****************************************************************************
-Copyright (c) Microsoft Corporation. All rights reserved. 
-Licensed under the Apache License, Version 2.0 (the "License"); you may not use
-this file except in compliance with the License. You may obtain a copy of the
-License at http://www.apache.org/licenses/LICENSE-2.0  
- 
-THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
-WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
-MERCHANTABLITY OR NON-INFRINGEMENT. 
- 
-See the Apache Version 2.0 License for specific language governing permissions
-and limitations under the License.
-***************************************************************************** */
-
-/// <reference no-default-lib="true"/>
-/////////////////////////////
-/// ECMAScript APIs
-/////////////////////////////
-
-declare const NaN: number;
-declare const Infinity: number;
-
-/**
-  * Evaluates JavaScript code and executes it.
-  * @param x A String value that contains valid JavaScript code.
-  */
-declare function eval(x: string): any;
-
-/**
-  * Converts A string to an integer.
-  * @param s A string to convert into a number.
-  * @param radix A value between 2 and 36 that specifies the base of the number in numString.
-  * If this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.
-  * All other strings are considered decimal.
-  */
-declare function parseInt(s: string, radix?: number): number;
-
-/**
-  * Converts a string to a floating-point number.
-  * @param string A string that contains a floating-point number.
-  */
-declare function parseFloat(string: string): number;
-
-/**
-  * Returns a Boolean value that indicates whether a value is the reserved value NaN (not a number).
-  * @param number A numeric value.
-  */
-declare function isNaN(number: number): boolean;
-
-/**
-  * Determines whether a supplied number is finite.
-  * @param number Any numeric value.
-  */
-declare function isFinite(number: number): boolean;
-
-/**
-  * Gets the unencoded version of an encoded Uniform Resource Identifier (URI).
-  * @param encodedURI A value representing an encoded URI.
-  */
-declare function decodeURI(encodedURI: string): string;
-
-/**
-  * Gets the unencoded version of an encoded component of a Uniform Resource Identifier (URI).
-  * @param encodedURIComponent A value representing an encoded URI component.
-  */
-declare function decodeURIComponent(encodedURIComponent: string): string;
-
-/**
-  * Encodes a text string as a valid Uniform Resource Identifier (URI)
-  * @param uri A value representing an encoded URI.
-  */
-declare function encodeURI(uri: string): string;
-
-/**
-  * Encodes a text string as a valid component of a Uniform Resource Identifier (URI).
-  * @param uriComponent A value representing an encoded URI component.
-  */
-declare function encodeURIComponent(uriComponent: string): string;
-
-interface PropertyDescriptor {
-    configurable?: boolean;
-    enumerable?: boolean;
-    value?: any;
-    writable?: boolean;
-    get? (): any;
-    set? (v: any): void;
-}
-
-interface PropertyDescriptorMap {
-    [s: string]: PropertyDescriptor;
-}
-
-interface Object {
-    /** The initial value of Object.prototype.constructor is the standard built-in Object constructor. */
-    constructor: Function;
-
-    /** Returns a string representation of an object. */
-    toString(): string;
-
-    /** Returns a date converted to a string using the current locale. */
-    toLocaleString(): string;
-
-    /** Returns the primitive value of the specified object. */
-    valueOf(): Object;
-
-    /**
-      * Determines whether an object has a property with the specified name.
-      * @param v A property name.
-      */
-    hasOwnProperty(v: string): boolean;
-
-    /**
-      * Determines whether an object exists in another object's prototype chain.
-      * @param v Another object whose prototype chain is to be checked.
-      */
-    isPrototypeOf(v: Object): boolean;
-
-    /**
-      * Determines whether a specified property is enumerable.
-      * @param v A property name.
-      */
-    propertyIsEnumerable(v: string): boolean;
-}
-
-interface ObjectConstructor {
-    new (value?: any): Object;
-    (): any;
-    (value: any): any;
-
-    /** A reference to the prototype for a class of objects. */
-    readonly prototype: Object;
-
-    /**
-      * Returns the prototype of an object.
-      * @param o The object that references the prototype.
-      */
-    getPrototypeOf(o: any): any;
-
-    /**
-      * Gets the own property descriptor of the specified object.
-      * An own property descriptor is one that is defined directly on the object and is not inherited from the object's prototype.
-      * @param o Object that contains the property.
-      * @param p Name of the property.
-    */
-    getOwnPropertyDescriptor(o: any, p: string): PropertyDescriptor;
-
-    /**
-      * Returns the names of the own properties of an object. The own properties of an object are those that are defined directly
-      * on that object, and are not inherited from the object's prototype. The properties of an object include both fields (objects) and functions.
-      * @param o Object that contains the own properties.
-      */
-    getOwnPropertyNames(o: any): string[];
-
-    /**
-      * Creates an object that has null prototype.
-      * @param o Object to use as a prototype. May be null
-      */
-    create(o: null): any;
-
-    /**
-      * Creates an object that has the specified prototype, and that optionally contains specified properties.
-      * @param o Object to use as a prototype. May be null
-      */
-    create<T>(o: T): T;
-
-    /**
-      * Creates an object that has the specified prototype, and that optionally contains specified properties.
-      * @param o Object to use as a prototype. May be null
-      * @param properties JavaScript object that contains one or more property descriptors.
-      */
-    create(o: any, properties: PropertyDescriptorMap): any;
-
-    /**
-      * Adds a property to an object, or modifies attributes of an existing property.
-      * @param o Object on which to add or modify the property. This can be a native JavaScript object (that is, a user-defined object or a built in object) or a DOM object.
-      * @param p The property name.
-      * @param attributes Descriptor for the property. It can be for a data property or an accessor property.
-      */
-    defineProperty(o: any, p: string, attributes: PropertyDescriptor): any;
-
-    /**
-      * Adds one or more properties to an object, and/or modifies attributes of existing properties.
-      * @param o Object on which to add or modify the properties. This can be a native JavaScript object or a DOM object.
-      * @param properties JavaScript object that contains one or more descriptor objects. Each descriptor object describes a data property or an accessor property.
-      */
-    defineProperties(o: any, properties: PropertyDescriptorMap): any;
-
-    /**
-      * Prevents the modification of attributes of existing properties, and prevents the addition of new properties.
-      * @param o Object on which to lock the attributes.
-      */
-    seal<T>(o: T): T;
-
-    /**
-      * Prevents the modification of existing property attributes and values, and prevents the addition of new properties.
-      * @param o Object on which to lock the attributes.
-      */
-    freeze<T>(o: T): T;
-
-    /**
-      * Prevents the addition of new properties to an object.
-      * @param o Object to make non-extensible.
-      */
-    preventExtensions<T>(o: T): T;
-
-    /**
-      * Returns true if existing property attributes cannot be modified in an object and new properties cannot be added to the object.
-      * @param o Object to test.
-      */
-    isSealed(o: any): boolean;
-
-    /**
-      * Returns true if existing property attributes and values cannot be modified in an object, and new properties cannot be added to the object.
-      * @param o Object to test.
-      */
-    isFrozen(o: any): boolean;
-
-    /**
-      * Returns a value that indicates whether new properties can be added to an object.
-      * @param o Object to test.
-      */
-    isExtensible(o: any): boolean;
-
-    /**
-      * Returns the names of the enumerable properties and methods of an object.
-      * @param o Object that contains the properties and methods. This can be an object that you created or an existing Document Object Model (DOM) object.
-      */
-    keys(o: any): string[];
-}
-
-/**
-  * Provides functionality common to all JavaScript objects.
-  */
-declare const Object: ObjectConstructor;
-
-/**
-  * Creates a new function.
-  */
-interface Function {
-    /**
-      * Calls the function, substituting the specified object for the this value of the function, and the specified array for the arguments of the function.
-      * @param thisArg The object to be used as the this object.
-      * @param argArray A set of arguments to be passed to the function.
-      */
-    apply(this: Function, thisArg: any, argArray?: any): any;
-
-    /**
-      * Calls a method of an object, substituting another object for the current object.
-      * @param thisArg The object to be used as the current object.
-      * @param argArray A list of arguments to be passed to the method.
-      */
-    call(this: Function, thisArg: any, ...argArray: any[]): any;
-
-    /**
-      * For a given function, creates a bound function that has the same body as the original function.
-      * The this object of the bound function is associated with the specified object, and has the specified initial parameters.
-      * @param thisArg An object to which the this keyword can refer inside the new function.
-      * @param argArray A list of arguments to be passed to the new function.
-      */
-    bind(this: Function, thisArg: any, ...argArray: any[]): any;
-
-    prototype: any;
-    readonly length: number;
-
-    // Non-standard extensions
-    arguments: any;
-    caller: Function;
-}
-
-interface FunctionConstructor {
-    /**
-      * Creates a new function.
-      * @param args A list of arguments the function accepts.
-      */
-    new (...args: string[]): Function;
-    (...args: string[]): Function;
-    readonly prototype: Function;
-}
-
-declare const Function: FunctionConstructor;
-
-interface IArguments {
-    [index: number]: any;
-    length: number;
-    callee: Function;
-}
-
-interface String {
-    /** Returns a string representation of a string. */
-    toString(): string;
-
-    /**
-      * Returns the character at the specified index.
-      * @param pos The zero-based index of the desired character.
-      */
-    charAt(pos: number): string;
-
-    /**
-      * Returns the Unicode value of the character at the specified location.
-      * @param index The zero-based index of the desired character. If there is no character at the specified index, NaN is returned.
-      */
-    charCodeAt(index: number): number;
-
-    /**
-      * Returns a string that contains the concatenation of two or more strings.
-      * @param strings The strings to append to the end of the string.
-      */
-    concat(...strings: string[]): string;
-
-    /**
-      * Returns the position of the first occurrence of a substring.
-      * @param searchString The substring to search for in the string
-      * @param position The index at which to begin searching the String object. If omitted, search starts at the beginning of the string.
-      */
-    indexOf(searchString: string, position?: number): number;
-
-    /**
-      * Returns the last occurrence of a substring in the string.
-      * @param searchString The substring to search for.
-      * @param position The index at which to begin searching. If omitted, the search begins at the end of the string.
-      */
-    lastIndexOf(searchString: string, position?: number): number;
-
-    /**
-      * Determines whether two strings are equivalent in the current locale.
-      * @param that String to compare to target string
-      */
-    localeCompare(that: string): number;
-
-    /**
-      * Matches a string with a regular expression, and returns an array containing the results of that search.
-      * @param regexp A variable name or string literal containing the regular expression pattern and flags.
-      */
-    match(regexp: string): RegExpMatchArray | null;
-
-    /**
-      * Matches a string with a regular expression, and returns an array containing the results of that search.
-      * @param regexp A regular expression object that contains the regular expression pattern and applicable flags.
-      */
-    match(regexp: RegExp): RegExpMatchArray | null;
-
-    /**
-      * Replaces text in a string, using a regular expression or search string.
-      * @param searchValue A string that represents the regular expression.
-      * @param replaceValue A string containing the text to replace for every successful match of searchValue in this string.
-      */
-    replace(searchValue: string, replaceValue: string): string;
-
-    /**
-      * Replaces text in a string, using a regular expression or search string.
-      * @param searchValue A string that represents the regular expression.
-      * @param replacer A function that returns the replacement text.
-      */
-    replace(searchValue: string, replacer: (substring: string, ...args: any[]) => string): string;
-
-    /**
-      * Replaces text in a string, using a regular expression or search string.
-      * @param searchValue A Regular Expression object containing the regular expression pattern and applicable flags.
-      * @param replaceValue A string containing the text to replace for every successful match of searchValue in this string.
-      */
-    replace(searchValue: RegExp, replaceValue: string): string;
-
-    /**
-      * Replaces text in a string, using a regular expression or search string.
-      * @param searchValue A Regular Expression object containing the regular expression pattern and applicable flags
-      * @param replacer A function that returns the replacement text.
-      */
-    replace(searchValue: RegExp, replacer: (substring: string, ...args: any[]) => string): string;
-
-    /**
-      * Finds the first substring match in a regular expression search.
-      * @param regexp The regular expression pattern and applicable flags.
-      */
-    search(regexp: string): number;
-
-    /**
-      * Finds the first substring match in a regular expression search.
-      * @param regexp The regular expression pattern and applicable flags.
-      */
-    search(regexp: RegExp): number;
-
-    /**
-      * Returns a section of a string.
-      * @param start The index to the beginning of the specified portion of stringObj.
-      * @param end The index to the end of the specified portion of stringObj. The substring includes the characters up to, but not including, the character indicated by end.
-      * If this value is not specified, the substring continues to the end of stringObj.
-      */
-    slice(start?: number, end?: number): string;
-
-    /**
-      * Split a string into substrings using the specified separator and return them as an array.
-      * @param separator A string that identifies character or characters to use in separating the string. If omitted, a single-element array containing the entire string is returned.
-      * @param limit A value used to limit the number of elements returned in the array.
-      */
-    split(separator: string, limit?: number): string[];
-
-    /**
-      * Split a string into substrings using the specified separator and return them as an array.
-      * @param separator A Regular Express that identifies character or characters to use in separating the string. If omitted, a single-element array containing the entire string is returned.
-      * @param limit A value used to limit the number of elements returned in the array.
-      */
-    split(separator: RegExp, limit?: number): string[];
-
-    /**
-      * Returns the substring at the specified location within a String object.
-      * @param start The zero-based index number indicating the beginning of the substring.
-      * @param end Zero-based index number indicating the end of the substring. The substring includes the characters up to, but not including, the character indicated by end.
-      * If end is omitted, the characters from start through the end of the original string are returned.
-      */
-    substring(start: number, end?: number): string;
-
-    /** Converts all the alphabetic characters in a string to lowercase. */
-    toLowerCase(): string;
-
-    /** Converts all alphabetic characters to lowercase, taking into account the host environment's current locale. */
-    toLocaleLowerCase(): string;
-
-    /** Converts all the alphabetic characters in a string to uppercase. */
-    toUpperCase(): string;
-
-    /** Returns a string where all alphabetic characters have been converted to uppercase, taking into account the host environment's current locale. */
-    toLocaleUpperCase(): string;
-
-    /** Removes the leading and trailing white space and line terminator characters from a string. */
-    trim(): string;
-
-    /** Returns the length of a String object. */
-    readonly length: number;
-
-    // IE extensions
-    /**
-      * Gets a substring beginning at the specified location and having the specified length.
-      * @param from The starting position of the desired substring. The index of the first character in the string is zero.
-      * @param length The number of characters to include in the returned substring.
-      */
-    substr(from: number, length?: number): string;
-
-    /** Returns the primitive value of the specified object. */
-    valueOf(): string;
-
-    readonly [index: number]: string;
-}
-
-interface StringConstructor {
-    new (value?: any): String;
-    (value?: any): string;
-    readonly prototype: String;
-    fromCharCode(...codes: number[]): string;
-}
-
-/**
-  * Allows manipulation and formatting of text strings and determination and location of substrings within strings.
-  */
-declare const String: StringConstructor;
-
-interface Boolean {
-    /** Returns the primitive value of the specified object. */
-    valueOf(): boolean;
-}
-
-interface BooleanConstructor {
-    new (value?: any): Boolean;
-    (value?: any): boolean;
-    readonly prototype: Boolean;
-}
-
-declare const Boolean: BooleanConstructor;
-
-interface Number {
-    /**
-      * Returns a string representation of an object.
-      * @param radix Specifies a radix for converting numeric values to strings. This value is only used for numbers.
-      */
-    toString(radix?: number): string;
-
-    /**
-      * Returns a string representing a number in fixed-point notation.
-      * @param fractionDigits Number of digits after the decimal point. Must be in the range 0 - 20, inclusive.
-      */
-    toFixed(fractionDigits?: number): string;
-
-    /**
-      * Returns a string containing a number represented in exponential notation.
-      * @param fractionDigits Number of digits after the decimal point. Must be in the range 0 - 20, inclusive.
-      */
-    toExponential(fractionDigits?: number): string;
-
-    /**
-      * Returns a string containing a number represented either in exponential or fixed-point notation with a specified number of digits.
-      * @param precision Number of significant digits. Must be in the range 1 - 21, inclusive.
-      */
-    toPrecision(precision?: number): string;
-
-    /** Returns the primitive value of the specified object. */
-    valueOf(): number;
-}
-
-interface NumberConstructor {
-    new (value?: any): Number;
-    (value?: any): number;
-    readonly prototype: Number;
-
-    /** The largest number that can be represented in JavaScript. Equal to approximately 1.79E+308. */
-    readonly MAX_VALUE: number;
-
-    /** The closest number to zero that can be represented in JavaScript. Equal to approximately 5.00E-324. */
-    readonly MIN_VALUE: number;
-
-    /**
-      * A value that is not a number.
-      * In equality comparisons, NaN does not equal any value, including itself. To test whether a value is equivalent to NaN, use the isNaN function.
-      */
-    readonly NaN: number;
-
-    /**
-      * A value that is less than the largest negative number that can be represented in JavaScript.
-      * JavaScript displays NEGATIVE_INFINITY values as -infinity.
-      */
-    readonly NEGATIVE_INFINITY: number;
-
-    /**
-      * A value greater than the largest number that can be represented in JavaScript.
-      * JavaScript displays POSITIVE_INFINITY values as infinity.
-      */
-    readonly POSITIVE_INFINITY: number;
-}
-
-/** An object that represents a number of any kind. All JavaScript numbers are 64-bit floating-point numbers. */
-declare const Number: NumberConstructor;
-
-interface TemplateStringsArray extends ReadonlyArray<string> {
-    readonly raw: ReadonlyArray<string>
-}
-
-interface Math {
-    /** The mathematical constant e. This is Euler's number, the base of natural logarithms. */
-    readonly E: number;
-    /** The natural logarithm of 10. */
-    readonly LN10: number;
-    /** The natural logarithm of 2. */
-    readonly LN2: number;
-    /** The base-2 logarithm of e. */
-    readonly LOG2E: number;
-    /** The base-10 logarithm of e. */
-    readonly LOG10E: number;
-    /** Pi. This is the ratio of the circumference of a circle to its diameter. */
-    readonly PI: number;
-    /** The square root of 0.5, or, equivalently, one divided by the square root of 2. */
-    readonly SQRT1_2: number;
-    /** The square root of 2. */
-    readonly SQRT2: number;
-    /**
-      * Returns the absolute value of a number (the value without regard to whether it is positive or negative).
-      * For example, the absolute value of -5 is the same as the absolute value of 5.
-      * @param x A numeric expression for which the absolute value is needed.
-      */
-    abs(x: number): number;
-    /**
-      * Returns the arc cosine (or inverse cosine) of a number.
-      * @param x A numeric expression.
-      */
-    acos(x: number): number;
-    /**
-      * Returns the arcsine of a number.
-      * @param x A numeric expression.
-      */
-    asin(x: number): number;
-    /**
-      * Returns the arctangent of a number.
-      * @param x A numeric expression for which the arctangent is needed.
-      */
-    atan(x: number): number;
-    /**
-      * Returns the angle (in radians) from the X axis to a point.
-      * @param y A numeric expression representing the cartesian y-coordinate.
-      * @param x A numeric expression representing the cartesian x-coordinate.
-      */
-    atan2(y: number, x: number): number;
-    /**
-      * Returns the smallest number greater than or equal to its numeric argument.
-      * @param x A numeric expression.
-      */
-    ceil(x: number): number;
-    /**
-      * Returns the cosine of a number.
-      * @param x A numeric expression that contains an angle measured in radians.
-      */
-    cos(x: number): number;
-    /**
-      * Returns e (the base of natural logarithms) raised to a power.
-      * @param x A numeric expression representing the power of e.
-      */
-    exp(x: number): number;
-    /**
-      * Returns the greatest number less than or equal to its numeric argument.
-      * @param x A numeric expression.
-      */
-    floor(x: number): number;
-    /**
-      * Returns the natural logarithm (base e) of a number.
-      * @param x A numeric expression.
-      */
-    log(x: number): number;
-    /**
-      * Returns the larger of a set of supplied numeric expressions.
-      * @param values Numeric expressions to be evaluated.
-      */
-    max(...values: number[]): number;
-    /**
-      * Returns the smaller of a set of supplied numeric expressions.
-      * @param values Numeric expressions to be evaluated.
-      */
-    min(...values: number[]): number;
-    /**
-      * Returns the value of a base expression taken to a specified power.
-      * @param x The base value of the expression.
-      * @param y The exponent value of the expression.
-      */
-    pow(x: number, y: number): number;
-    /** Returns a pseudorandom number between 0 and 1. */
-    random(): number;
-    /**
-      * Returns a supplied numeric expression rounded to the nearest number.
-      * @param x The value to be rounded to the nearest number.
-      */
-    round(x: number): number;
-    /**
-      * Returns the sine of a number.
-      * @param x A numeric expression that contains an angle measured in radians.
-      */
-    sin(x: number): number;
-    /**
-      * Returns the square root of a number.
-      * @param x A numeric expression.
-      */
-    sqrt(x: number): number;
-    /**
-      * Returns the tangent of a number.
-      * @param x A numeric expression that contains an angle measured in radians.
-      */
-    tan(x: number): number;
-}
-/** An intrinsic object that provides basic mathematics functionality and constants. */
-declare const Math: Math;
-
-/** Enables basic storage and retrieval of dates and times. */
-interface Date {
-    /** Returns a string representation of a date. The format of the string depends on the locale. */
-    toString(): string;
-    /** Returns a date as a string value. */
-    toDateString(): string;
-    /** Returns a time as a string value. */
-    toTimeString(): string;
-    /** Returns a value as a string value appropriate to the host environment's current locale. */
-    toLocaleString(): string;
-    /** Returns a date as a string value appropriate to the host environment's current locale. */
-    toLocaleDateString(): string;
-    /** Returns a time as a string value appropriate to the host environment's current locale. */
-    toLocaleTimeString(): string;
-    /** Returns the stored time value in milliseconds since midnight, January 1, 1970 UTC. */
-    valueOf(): number;
-    /** Gets the time value in milliseconds. */
-    getTime(): number;
-    /** Gets the year, using local time. */
-    getFullYear(): number;
-    /** Gets the year using Universal Coordinated Time (UTC). */
-    getUTCFullYear(): number;
-    /** Gets the month, using local time. */
-    getMonth(): number;
-    /** Gets the month of a Date object using Universal Coordinated Time (UTC). */
-    getUTCMonth(): number;
-    /** Gets the day-of-the-month, using local time. */
-    getDate(): number;
-    /** Gets the day-of-the-month, using Universal Coordinated Time (UTC). */
-    getUTCDate(): number;
-    /** Gets the day of the week, using local time. */
-    getDay(): number;
-    /** Gets the day of the week using Universal Coordinated Time (UTC). */
-    getUTCDay(): number;
-    /** Gets the hours in a date, using local time. */
-    getHours(): number;
-    /** Gets the hours value in a Date object using Universal Coordinated Time (UTC). */
-    getUTCHours(): number;
-    /** Gets the minutes of a Date object, using local time. */
-    getMinutes(): number;
-    /** Gets the minutes of a Date object using Universal Coordinated Time (UTC). */
-    getUTCMinutes(): number;
-    /** Gets the seconds of a Date object, using local time. */
-    getSeconds(): number;
-    /** Gets the seconds of a Date object using Universal Coordinated Time (UTC). */
-    getUTCSeconds(): number;
-    /** Gets the milliseconds of a Date, using local time. */
-    getMilliseconds(): number;
-    /** Gets the milliseconds of a Date object using Universal Coordinated Time (UTC). */
-    getUTCMilliseconds(): number;
-    /** Gets the difference in minutes between the time on the local computer and Universal Coordinated Time (UTC). */
-    getTimezoneOffset(): number;
-    /**
-      * Sets the date and time value in the Date object.
-      * @param time A numeric value representing the number of elapsed milliseconds since midnight, January 1, 1970 GMT.
-      */
-    setTime(time: number): number;
-    /**
-      * Sets the milliseconds value in the Date object using local time.
-      * @param ms A numeric value equal to the millisecond value.
-      */
-    setMilliseconds(ms: number): number;
-    /**
-      * Sets the milliseconds value in the Date object using Universal Coordinated Time (UTC).
-      * @param ms A numeric value equal to the millisecond value.
-      */
-    setUTCMilliseconds(ms: number): number;
-
-    /**
-      * Sets the seconds value in the Date object using local time.
-      * @param sec A numeric value equal to the seconds value.
-      * @param ms A numeric value equal to the milliseconds value.
-      */
-    setSeconds(sec: number, ms?: number): number;
-    /**
-      * Sets the seconds value in the Date object using Universal Coordinated Time (UTC).
-      * @param sec A numeric value equal to the seconds value.
-      * @param ms A numeric value equal to the milliseconds value.
-      */
-    setUTCSeconds(sec: number, ms?: number): number;
-    /**
-      * Sets the minutes value in the Date object using local time.
-      * @param min A numeric value equal to the minutes value.
-      * @param sec A numeric value equal to the seconds value.
-      * @param ms A numeric value equal to the milliseconds value.
-      */
-    setMinutes(min: number, sec?: number, ms?: number): number;
-    /**
-      * Sets the minutes value in the Date object using Universal Coordinated Time (UTC).
-      * @param min A numeric value equal to the minutes value.
-      * @param sec A numeric value equal to the seconds value.
-      * @param ms A numeric value equal to the milliseconds value.
-      */
-    setUTCMinutes(min: number, sec?: number, ms?: number): number;
-    /**
-      * Sets the hour value in the Date object using local time.
-      * @param hours A numeric value equal to the hours value.
-      * @param min A numeric value equal to the minutes value.
-      * @param sec A numeric value equal to the seconds value.
-      * @param ms A numeric value equal to the milliseconds value.
-      */
-    setHours(hours: number, min?: number, sec?: number, ms?: number): number;
-    /**
-      * Sets the hours value in the Date object using Universal Coordinated Time (UTC).
-      * @param hours A numeric value equal to the hours value.
-      * @param min A numeric value equal to the minutes value.
-      * @param sec A numeric value equal to the seconds value.
-      * @param ms A numeric value equal to the milliseconds value.
-      */
-    setUTCHours(hours: number, min?: number, sec?: number, ms?: number): number;
-    /**
-      * Sets the numeric day-of-the-month value of the Date object using local time.
-      * @param date A numeric value equal to the day of the month.
-      */
-    setDate(date: number): number;
-    /**
-      * Sets the numeric day of the month in the Date object using Universal Coordinated Time (UTC).
-      * @param date A numeric value equal to the day of the month.
-      */
-    setUTCDate(date: number): number;
-    /**
-      * Sets the month value in the Date object using local time.
-      * @param month A numeric value equal to the month. The value for January is 0, and other month values follow consecutively.
-      * @param date A numeric value representing the day of the month. If this value is not supplied, the value from a call to the getDate method is used.
-      */
-    setMonth(month: number, date?: number): number;
-    /**
-      * Sets the month value in the Date object using Universal Coordinated Time (UTC).
-      * @param month A numeric value equal to the month. The value for January is 0, and other month values follow consecutively.
-      * @param date A numeric value representing the day of the month. If it is not supplied, the value from a call to the getUTCDate method is used.
-      */
-    setUTCMonth(month: number, date?: number): number;
-    /**
-      * Sets the year of the Date object using local time.
-      * @param year A numeric value for the year.
-      * @param month A zero-based numeric value for the month (0 for January, 11 for December). Must be specified if numDate is specified.
-      * @param date A numeric value equal for the day of the month.
-      */
-    setFullYear(year: number, month?: number, date?: number): number;
-    /**
-      * Sets the year value in the Date object using Universal Coordinated Time (UTC).
-      * @param year A numeric value equal to the year.
-      * @param month A numeric value equal to the month. The value for January is 0, and other month values follow consecutively. Must be supplied if numDate is supplied.
-      * @param date A numeric value equal to the day of the month.
-      */
-    setUTCFullYear(year: number, month?: number, date?: number): number;
-    /** Returns a date converted to a string using Universal Coordinated Time (UTC). */
-    toUTCString(): string;
-    /** Returns a date as a string value in ISO format. */
-    toISOString(): string;
-    /** Used by the JSON.stringify method to enable the transformation of an object's data for JavaScript Object Notation (JSON) serialization. */
-    toJSON(key?: any): string;
-}
-
-interface DateConstructor {
-    new (): Date;
-    new (value: number): Date;
-    new (value: string): Date;
-    new (year: number, month: number, date?: number, hours?: number, minutes?: number, seconds?: number, ms?: number): Date;
-    (): string;
-    readonly prototype: Date;
-    /**
-      * Parses a string containing a date, and returns the number of milliseconds between that date and midnight, January 1, 1970.
-      * @param s A date string
-      */
-    parse(s: string): number;
-    /**
-      * Returns the number of milliseconds between midnight, January 1, 1970 Universal Coordinated Time (UTC) (or GMT) and the specified date.
-      * @param year The full year designation is required for cross-century date accuracy. If year is between 0 and 99 is used, then year is assumed to be 1900 + year.
-      * @param month The month as an number between 0 and 11 (January to December).
-      * @param date The date as an number between 1 and 31.
-      * @param hours Must be supplied if minutes is supplied. An number from 0 to 23 (midnight to 11pm) that specifies the hour.
-      * @param minutes Must be supplied if seconds is supplied. An number from 0 to 59 that specifies the minutes.
-      * @param seconds Must be supplied if milliseconds is supplied. An number from 0 to 59 that specifies the seconds.
-      * @param ms An number from 0 to 999 that specifies the milliseconds.
-      */
-    UTC(year: number, month: number, date?: number, hours?: number, minutes?: number, seconds?: number, ms?: number): number;
-    now(): number;
-}
-
-declare const Date: DateConstructor;
-
-interface RegExpMatchArray extends Array<string> {
-    index?: number;
-    input?: string;
-}
-
-interface RegExpExecArray extends Array<string> {
-    index: number;
-    input: string;
-}
-
-interface RegExp {
-    /**
-      * Executes a search on a string using a regular expression pattern, and returns an array containing the results of that search.
-      * @param string The String object or string literal on which to perform the search.
-      */
-    exec(string: string): RegExpExecArray | null;
-
-    /**
-      * Returns a Boolean value that indicates whether or not a pattern exists in a searched string.
-      * @param string String on which to perform the search.
-      */
-    test(string: string): boolean;
-
-    /** Returns a copy of the text of the regular expression pattern. Read-only. The regExp argument is a Regular expression object. It can be a variable name or a literal. */
-    readonly source: string;
-
-    /** Returns a Boolean value indicating the state of the global flag (g) used with a regular expression. Default is false. Read-only. */
-    readonly global: boolean;
-
-    /** Returns a Boolean value indicating the state of the ignoreCase flag (i) used with a regular expression. Default is false. Read-only. */
-    readonly ignoreCase: boolean;
-
-    /** Returns a Boolean value indicating the state of the multiline flag (m) used with a regular expression. Default is false. Read-only. */
-    readonly multiline: boolean;
-
-    lastIndex: number;
-
-    // Non-standard extensions
-    compile(): this;
-}
-
-interface RegExpConstructor {
-    new (pattern: RegExp): RegExp;
-    new (pattern: string, flags?: string): RegExp;
-    (pattern: RegExp): RegExp;
-    (pattern: string, flags?: string): RegExp;
-    readonly prototype: RegExp;
-
-    // Non-standard extensions
-    $1: string;
-    $2: string;
-    $3: string;
-    $4: string;
-    $5: string;
-    $6: string;
-    $7: string;
-    $8: string;
-    $9: string;
-    lastMatch: string;
-}
-
-declare const RegExp: RegExpConstructor;
-
-interface Error {
-    name: string;
-    message: string;
-    stack?: string;
-}
-
-interface ErrorConstructor {
-    new (message?: string): Error;
-    (message?: string): Error;
-    readonly prototype: Error;
-}
-
-declare const Error: ErrorConstructor;
-
-interface EvalError extends Error {
-}
-
-interface EvalErrorConstructor {
-    new (message?: string): EvalError;
-    (message?: string): EvalError;
-    readonly prototype: EvalError;
-}
-
-declare const EvalError: EvalErrorConstructor;
-
-interface RangeError extends Error {
-}
-
-interface RangeErrorConstructor {
-    new (message?: string): RangeError;
-    (message?: string): RangeError;
-    readonly prototype: RangeError;
-}
-
-declare const RangeError: RangeErrorConstructor;
-
-interface ReferenceError extends Error {
-}
-
-interface ReferenceErrorConstructor {
-    new (message?: string): ReferenceError;
-    (message?: string): ReferenceError;
-    readonly prototype: ReferenceError;
-}
-
-declare const ReferenceError: ReferenceErrorConstructor;
-
-interface SyntaxError extends Error {
-}
-
-interface SyntaxErrorConstructor {
-    new (message?: string): SyntaxError;
-    (message?: string): SyntaxError;
-    readonly prototype: SyntaxError;
-}
-
-declare const SyntaxError: SyntaxErrorConstructor;
-
-interface TypeError extends Error {
-}
-
-interface TypeErrorConstructor {
-    new (message?: string): TypeError;
-    (message?: string): TypeError;
-    readonly prototype: TypeError;
-}
-
-declare const TypeError: TypeErrorConstructor;
-
-interface URIError extends Error {
-}
-
-interface URIErrorConstructor {
-    new (message?: string): URIError;
-    (message?: string): URIError;
-    readonly prototype: URIError;
-}
-
-declare const URIError: URIErrorConstructor;
-
-interface JSON {
-    /**
-      * Converts a JavaScript Object Notation (JSON) string into an object.
-      * @param text A valid JSON string.
-      * @param reviver A function that transforms the results. This function is called for each member of the object.
-      * If a member contains nested objects, the nested objects are transformed before the parent object is.
-      */
-    parse(text: string, reviver?: (key: any, value: any) => any): any;
-    /**
-      * Converts a JavaScript value to a JavaScript Object Notation (JSON) string.
-      * @param value A JavaScript value, usually an object or array, to be converted.
-      * @param replacer A function that transforms the results.
-      * @param space Adds indentation, white space, and line break characters to the return-value JSON text to make it easier to read.
-      */
-    stringify(value: any, replacer?: (key: string, value: any) => any, space?: string | number): string;
-    /**
-      * Converts a JavaScript value to a JavaScript Object Notation (JSON) string.
-      * @param value A JavaScript value, usually an object or array, to be converted.
-      * @param replacer An array of strings and numbers that acts as a approved list for selecting the object properties that will be stringified.
-      * @param space Adds indentation, white space, and line break characters to the return-value JSON text to make it easier to read.
-      */
-    stringify(value: any, replacer?: (number | string)[] | null, space?: string | number): string;
-}
-
-/**
-  * An intrinsic object that provides functions to convert JavaScript values to and from the JavaScript Object Notation (JSON) format.
-  */
-declare const JSON: JSON;
-
-
-/////////////////////////////
-/// ECMAScript Array API (specially handled by compiler)
-/////////////////////////////
-
-interface ReadonlyArray<T> {
-    /**
-      * Gets the length of the array. This is a number one higher than the highest element defined in an array.
-      */
-    readonly length: number;
-    /**
-      * Returns a string representation of an array.
-      */
-    toString(): string;
-    toLocaleString(): string;
-    /**
-      * Combines two or more arrays.
-      * @param items Additional items to add to the end of array1.
-      */
-    concat<U extends ReadonlyArray<T>>(...items: U[]): T[];
-    /**
-      * Combines two or more arrays.
-      * @param items Additional items to add to the end of array1.
-      */
-    concat(...items: T[][]): T[];
-    /**
-      * Combines two or more arrays.
-      * @param items Additional items to add to the end of array1.
-      */
-    concat(...items: (T | T[])[]): T[];
-    /**
-      * Adds all the elements of an array separated by the specified separator string.
-      * @param separator A string used to separate one element of an array from the next in the resulting String. If omitted, the array elements are separated with a comma.
-      */
-    join(separator?: string): string;
-    /**
-      * Returns a section of an array.
-      * @param start The beginning of the specified portion of the array.
-      * @param end The end of the specified portion of the array.
-      */
-    slice(start?: number, end?: number): T[];
-    /**
-      * Returns the index of the first occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the search starts at index 0.
-      */
-    indexOf(searchElement: T, fromIndex?: number): number;
-
-    /**
-      * Returns the index of the last occurrence of a specified value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the search starts at the last index in the array.
-      */
-    lastIndexOf(searchElement: T, fromIndex?: number): number;
-    /**
-      * Determines whether all the members of an array satisfy the specified test.
-      * @param callbackfn A function that accepts up to three arguments. The every method calls the callbackfn function for each element in array1 until the callbackfn returns false, or until the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
-      */
-    every(callbackfn: (value: T, index: number, array: ReadonlyArray<T>) => boolean, thisArg?: any): boolean;
-    /**
-      * Determines whether the specified callback function returns true for any element of an array.
-      * @param callbackfn A function that accepts up to three arguments. The some method calls the callbackfn function for each element in array1 until the callbackfn returns true, or until the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
-      */
-    some(callbackfn: (value: T, index: number, array: ReadonlyArray<T>) => boolean, thisArg?: any): boolean;
-    /**
-      * Performs the specified action for each element in an array.
-      * @param callbackfn  A function that accepts up to three arguments. forEach calls the callbackfn function one time for each element in the array.
-      * @param thisArg  An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
-      */
-    forEach(callbackfn: (value: T, index: number, array: ReadonlyArray<T>) => void, thisArg?: any): void;
-    /**
-      * Calls a defined callback function on each element of an array, and returns an array that contains the results.
-      * @param callbackfn A function that accepts up to three arguments. The map method calls the callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
-      */
-    map<U>(callbackfn: (value: T, index: number, array: ReadonlyArray<T>) => U, thisArg?: any): U[];
-    /**
-     * Returns the elements of an array that meet the condition specified in a callback function.
-     * @param callbackfn A function that accepts up to three arguments. The filter method calls the callbackfn function one time for each element in the array.
-     * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
-     */
-    filter<S extends T>(callbackfn: (value: T, index: number, array: ReadonlyArray<T>) => value is S, thisArg?: any): S[];
-    /**
-      * Returns the elements of an array that meet the condition specified in a callback function.
-      * @param callbackfn A function that accepts up to three arguments. The filter method calls the callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
-      */
-    filter(callbackfn: (value: T, index: number, array: ReadonlyArray<T>) => any, thisArg?: any): T[];
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
-      */
-    reduce(callbackfn: (previousValue: T, currentValue: T, currentIndex: number, array: ReadonlyArray<T>) => T, initialValue?: T): T;
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
-      */
-    reduce<U>(callbackfn: (previousValue: U, currentValue: T, currentIndex: number, array: ReadonlyArray<T>) => U, initialValue: U): U;
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
-      */
-    reduceRight(callbackfn: (previousValue: T, currentValue: T, currentIndex: number, array: ReadonlyArray<T>) => T, initialValue?: T): T;
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
-      */
-    reduceRight<U>(callbackfn: (previousValue: U, currentValue: T, currentIndex: number, array: ReadonlyArray<T>) => U, initialValue: U): U;
-
-    readonly [n: number]: T;
-}
-
-interface Array<T> {
-    /**
-      * Gets or sets the length of the array. This is a number one higher than the highest element defined in an array.
-      */
-    length: number;
-    /**
-      * Returns a string representation of an array.
-      */
-    toString(): string;
-    toLocaleString(): string;
-    /**
-      * Appends new elements to an array, and returns the new length of the array.
-      * @param items New elements of the Array.
-      */
-    push(...items: T[]): number;
-    /**
-      * Removes the last element from an array and returns it.
-      */
-    pop(): T | undefined;
-    /**
-      * Combines two or more arrays.
-      * @param items Additional items to add to the end of array1.
-      */
-    concat(...items: T[][]): T[];
-    /**
-      * Combines two or more arrays.
-      * @param items Additional items to add to the end of array1.
-      */
-    concat(...items: (T | T[])[]): T[];
-    /**
-      * Adds all the elements of an array separated by the specified separator string.
-      * @param separator A string used to separate one element of an array from the next in the resulting String. If omitted, the array elements are separated with a comma.
-      */
-    join(separator?: string): string;
-    /**
-      * Reverses the elements in an Array.
-      */
-    reverse(): T[];
-    /**
-      * Removes the first element from an array and returns it.
-      */
-    shift(): T | undefined;
-    /**
-      * Returns a section of an array.
-      * @param start The beginning of the specified portion of the array.
-      * @param end The end of the specified portion of the array.
-      */
-    slice(start?: number, end?: number): T[];
-    /**
-      * Sorts an array.
-      * @param compareFn The name of the function used to determine the order of the elements. If omitted, the elements are sorted in ascending, ASCII character order.
-      */
-    sort(compareFn?: (a: T, b: T) => number): this;
-    /**
-      * Removes elements from an array and, if necessary, inserts new elements in their place, returning the deleted elements.
-      * @param start The zero-based location in the array from which to start removing elements.
-      */
-    splice(start: number): T[];
-    /**
-      * Removes elements from an array and, if necessary, inserts new elements in their place, returning the deleted elements.
-      * @param start The zero-based location in the array from which to start removing elements.
-      * @param deleteCount The number of elements to remove.
-      * @param items Elements to insert into the array in place of the deleted elements.
-      */
-    splice(start: number, deleteCount: number, ...items: T[]): T[];
-    /**
-      * Inserts new elements at the start of an array.
-      * @param items  Elements to insert at the start of the Array.
-      */
-    unshift(...items: T[]): number;
-    /**
-      * Returns the index of the first occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the search starts at index 0.
-      */
-    indexOf(searchElement: T, fromIndex?: number): number;
-    /**
-      * Returns the index of the last occurrence of a specified value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the search starts at the last index in the array.
-      */
-    lastIndexOf(searchElement: T, fromIndex?: number): number;
-    /**
-      * Determines whether all the members of an array satisfy the specified test.
-      * @param callbackfn A function that accepts up to three arguments. The every method calls the callbackfn function for each element in array1 until the callbackfn returns false, or until the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
-      */
-    every(callbackfn: (value: T, index: number, array: T[]) => boolean, thisArg?: any): boolean;
-    /**
-      * Determines whether the specified callback function returns true for any element of an array.
-      * @param callbackfn A function that accepts up to three arguments. The some method calls the callbackfn function for each element in array1 until the callbackfn returns true, or until the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
-      */
-    some(callbackfn: (value: T, index: number, array: T[]) => boolean, thisArg?: any): boolean;
-    /**
-      * Performs the specified action for each element in an array.
-      * @param callbackfn  A function that accepts up to three arguments. forEach calls the callbackfn function one time for each element in the array.
-      * @param thisArg  An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
-      */
-    forEach(callbackfn: (value: T, index: number, array: T[]) => void, thisArg?: any): void;
-    /**
-      * Calls a defined callback function on each element of an array, and returns an array that contains the results.
-      * @param callbackfn A function that accepts up to three arguments. The map method calls the callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
-      */
-    map<U>(callbackfn: (value: T, index: number, array: T[]) => U, thisArg?: any): U[];
-    /**
-      * Returns the elements of an array that meet the condition specified in a callback function.
-      * @param callbackfn A function that accepts up to three arguments. The filter method calls the callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
-      */
-    filter(callbackfn: (value: T, index: number, array: T[]) => any, thisArg?: any): T[];
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
-      */
-    reduce(callbackfn: (previousValue: T, currentValue: T, currentIndex: number, array: T[]) => T, initialValue?: T): T;
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
-      */
-    reduce<U>(callbackfn: (previousValue: U, currentValue: T, currentIndex: number, array: T[]) => U, initialValue: U): U;
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
-      */
-    reduceRight(callbackfn: (previousValue: T, currentValue: T, currentIndex: number, array: T[]) => T, initialValue?: T): T;
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
-      */
-    reduceRight<U>(callbackfn: (previousValue: U, currentValue: T, currentIndex: number, array: T[]) => U, initialValue: U): U;
-
-    [n: number]: T;
-}
-
-interface ArrayConstructor {
-    new (arrayLength?: number): any[];
-    new <T>(arrayLength: number): T[];
-    new <T>(...items: T[]): T[];
-    (arrayLength?: number): any[];
-    <T>(arrayLength: number): T[];
-    <T>(...items: T[]): T[];
-    isArray(arg: any): arg is Array<any>;
-    readonly prototype: Array<any>;
-}
-
-declare const Array: ArrayConstructor;
-
-interface TypedPropertyDescriptor<T> {
-    enumerable?: boolean;
-    configurable?: boolean;
-    writable?: boolean;
-    value?: T;
-    get?: () => T;
-    set?: (value: T) => void;
-}
-
-declare type ClassDecorator = <TFunction extends Function>(target: TFunction) => TFunction | void;
-declare type PropertyDecorator = (target: Object, propertyKey: string | symbol) => void;
-declare type MethodDecorator = <T>(target: Object, propertyKey: string | symbol, descriptor: TypedPropertyDescriptor<T>) => TypedPropertyDescriptor<T> | void;
-declare type ParameterDecorator = (target: Object, propertyKey: string | symbol, parameterIndex: number) => void;
-
-declare type PromiseConstructorLike = new <T>(executor: (resolve: (value?: T | PromiseLike<T>) => void, reject: (reason?: any) => void) => void) => PromiseLike<T>;
-
-interface PromiseLike<T> {
-    /**
-     * Attaches callbacks for the resolution and/or rejection of the Promise.
-     * @param onfulfilled The callback to execute when the Promise is resolved.
-     * @param onrejected The callback to execute when the Promise is rejected.
-     * @returns A Promise for the completion of which ever callback is executed.
-     */
-    then(
-        onfulfilled?: ((value: T) => T | PromiseLike<T>) | undefined | null,
-        onrejected?: ((reason: any) => T | PromiseLike<T>) | undefined | null): PromiseLike<T>;
-
-    /**
-     * Attaches callbacks for the resolution and/or rejection of the Promise.
-     * @param onfulfilled The callback to execute when the Promise is resolved.
-     * @param onrejected The callback to execute when the Promise is rejected.
-     * @returns A Promise for the completion of which ever callback is executed.
-     */
-    then<TResult>(
-        onfulfilled: ((value: T) => T | PromiseLike<T>) | undefined | null,
-        onrejected: (reason: any) => TResult | PromiseLike<TResult>): PromiseLike<T | TResult>;
-
-    /**
-     * Attaches callbacks for the resolution and/or rejection of the Promise.
-     * @param onfulfilled The callback to execute when the Promise is resolved.
-     * @param onrejected The callback to execute when the Promise is rejected.
-     * @returns A Promise for the completion of which ever callback is executed.
-     */
-    then<TResult>(
-        onfulfilled: (value: T) => TResult | PromiseLike<TResult>,
-        onrejected?: ((reason: any) => TResult | PromiseLike<TResult>) | undefined | null): PromiseLike<TResult>;
-
-    /**
-     * Attaches callbacks for the resolution and/or rejection of the Promise.
-     * @param onfulfilled The callback to execute when the Promise is resolved.
-     * @param onrejected The callback to execute when the Promise is rejected.
-     * @returns A Promise for the completion of which ever callback is executed.
-     */
-    then<TResult1, TResult2>(
-        onfulfilled: (value: T) => TResult1 | PromiseLike<TResult1>,
-        onrejected: (reason: any) => TResult2 | PromiseLike<TResult2>): PromiseLike<TResult1 | TResult2>;
-}
-
-interface ArrayLike<T> {
-    readonly length: number;
-    readonly [n: number]: T;
-}
-
-/**
-  * Represents a raw buffer of binary data, which is used to store data for the
-  * different typed arrays. ArrayBuffers cannot be read from or written to directly,
-  * but can be passed to a typed array or DataView Object to interpret the raw
-  * buffer as needed.
-  */
-interface ArrayBuffer {
-    /**
-      * Read-only. The length of the ArrayBuffer (in bytes).
-      */
-    readonly byteLength: number;
-
-    /**
-      * Returns a section of an ArrayBuffer.
-      */
-    slice(begin:number, end?:number): ArrayBuffer;
-}
-
-interface ArrayBufferConstructor {
-    readonly prototype: ArrayBuffer;
-    new (byteLength: number): ArrayBuffer;
-    isView(arg: any): arg is ArrayBufferView;
-}
-declare const ArrayBuffer: ArrayBufferConstructor;
-
-interface ArrayBufferView {
-    /**
-      * The ArrayBuffer instance referenced by the array.
-      */
-    buffer: ArrayBuffer;
-
-    /**
-      * The length in bytes of the array.
-      */
-    byteLength: number;
-
-    /**
-      * The offset in bytes of the array.
-      */
-    byteOffset: number;
-}
-
-interface DataView {
-    readonly buffer: ArrayBuffer;
-    readonly byteLength: number;
-    readonly byteOffset: number;
-    /**
-      * Gets the Float32 value at the specified byte offset from the start of the view. There is
-      * no alignment constraint; multi-byte values may be fetched from any offset.
-      * @param byteOffset The place in the buffer at which the value should be retrieved.
-      */
-    getFloat32(byteOffset: number, littleEndian?: boolean): number;
-
-    /**
-      * Gets the Float64 value at the specified byte offset from the start of the view. There is
-      * no alignment constraint; multi-byte values may be fetched from any offset.
-      * @param byteOffset The place in the buffer at which the value should be retrieved.
-      */
-    getFloat64(byteOffset: number, littleEndian?: boolean): number;
-
-    /**
-      * Gets the Int8 value at the specified byte offset from the start of the view. There is
-      * no alignment constraint; multi-byte values may be fetched from any offset.
-      * @param byteOffset The place in the buffer at which the value should be retrieved.
-      */
-    getInt8(byteOffset: number): number;
-
-    /**
-      * Gets the Int16 value at the specified byte offset from the start of the view. There is
-      * no alignment constraint; multi-byte values may be fetched from any offset.
-      * @param byteOffset The place in the buffer at which the value should be retrieved.
-      */
-    getInt16(byteOffset: number, littleEndian?: boolean): number;
-    /**
-      * Gets the Int32 value at the specified byte offset from the start of the view. There is
-      * no alignment constraint; multi-byte values may be fetched from any offset.
-      * @param byteOffset The place in the buffer at which the value should be retrieved.
-      */
-    getInt32(byteOffset: number, littleEndian?: boolean): number;
-
-    /**
-      * Gets the Uint8 value at the specified byte offset from the start of the view. There is
-      * no alignment constraint; multi-byte values may be fetched from any offset.
-      * @param byteOffset The place in the buffer at which the value should be retrieved.
-      */
-    getUint8(byteOffset: number): number;
-
-    /**
-      * Gets the Uint16 value at the specified byte offset from the start of the view. There is
-      * no alignment constraint; multi-byte values may be fetched from any offset.
-      * @param byteOffset The place in the buffer at which the value should be retrieved.
-      */
-    getUint16(byteOffset: number, littleEndian?: boolean): number;
-
-    /**
-      * Gets the Uint32 value at the specified byte offset from the start of the view. There is
-      * no alignment constraint; multi-byte values may be fetched from any offset.
-      * @param byteOffset The place in the buffer at which the value should be retrieved.
-      */
-    getUint32(byteOffset: number, littleEndian?: boolean): number;
-
-    /**
-      * Stores an Float32 value at the specified byte offset from the start of the view.
-      * @param byteOffset The place in the buffer at which the value should be set.
-      * @param value The value to set.
-      * @param littleEndian If false or undefined, a big-endian value should be written,
-      * otherwise a little-endian value should be written.
-      */
-    setFloat32(byteOffset: number, value: number, littleEndian?: boolean): void;
-
-    /**
-      * Stores an Float64 value at the specified byte offset from the start of the view.
-      * @param byteOffset The place in the buffer at which the value should be set.
-      * @param value The value to set.
-      * @param littleEndian If false or undefined, a big-endian value should be written,
-      * otherwise a little-endian value should be written.
-      */
-    setFloat64(byteOffset: number, value: number, littleEndian?: boolean): void;
-
-    /**
-      * Stores an Int8 value at the specified byte offset from the start of the view.
-      * @param byteOffset The place in the buffer at which the value should be set.
-      * @param value The value to set.
-      */
-    setInt8(byteOffset: number, value: number): void;
-
-    /**
-      * Stores an Int16 value at the specified byte offset from the start of the view.
-      * @param byteOffset The place in the buffer at which the value should be set.
-      * @param value The value to set.
-      * @param littleEndian If false or undefined, a big-endian value should be written,
-      * otherwise a little-endian value should be written.
-      */
-    setInt16(byteOffset: number, value: number, littleEndian?: boolean): void;
-
-    /**
-      * Stores an Int32 value at the specified byte offset from the start of the view.
-      * @param byteOffset The place in the buffer at which the value should be set.
-      * @param value The value to set.
-      * @param littleEndian If false or undefined, a big-endian value should be written,
-      * otherwise a little-endian value should be written.
-      */
-    setInt32(byteOffset: number, value: number, littleEndian?: boolean): void;
-
-    /**
-      * Stores an Uint8 value at the specified byte offset from the start of the view.
-      * @param byteOffset The place in the buffer at which the value should be set.
-      * @param value The value to set.
-      */
-    setUint8(byteOffset: number, value: number): void;
-
-    /**
-      * Stores an Uint16 value at the specified byte offset from the start of the view.
-      * @param byteOffset The place in the buffer at which the value should be set.
-      * @param value The value to set.
-      * @param littleEndian If false or undefined, a big-endian value should be written,
-      * otherwise a little-endian value should be written.
-      */
-    setUint16(byteOffset: number, value: number, littleEndian?: boolean): void;
-
-    /**
-      * Stores an Uint32 value at the specified byte offset from the start of the view.
-      * @param byteOffset The place in the buffer at which the value should be set.
-      * @param value The value to set.
-      * @param littleEndian If false or undefined, a big-endian value should be written,
-      * otherwise a little-endian value should be written.
-      */
-    setUint32(byteOffset: number, value: number, littleEndian?: boolean): void;
-}
-
-interface DataViewConstructor {
-    new (buffer: ArrayBuffer, byteOffset?: number, byteLength?: number): DataView;
-}
-declare const DataView: DataViewConstructor;
-
-/**
-  * A typed array of 8-bit integer values. The contents are initialized to 0. If the requested
-  * number of bytes could not be allocated an exception is raised.
-  */
-interface Int8Array {
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * The ArrayBuffer instance referenced by the array.
-      */
-    readonly buffer: ArrayBuffer;
-
-    /**
-      * The length in bytes of the array.
-      */
-    readonly byteLength: number;
-
-    /**
-      * The offset in bytes of the array.
-      */
-    readonly byteOffset: number;
-
-    /**
-      * Returns the this object after copying a section of the array identified by start and end
-      * to the same array starting at position target
-      * @param target If target is negative, it is treated as length+target where length is the
-      * length of the array.
-      * @param start If start is negative, it is treated as length+start. If end is negative, it
-      * is treated as length+end.
-      * @param end If not specified, length of the this object is used as its default value.
-      */
-    copyWithin(target: number, start: number, end?: number): this;
-
-    /**
-      * Determines whether all the members of an array satisfy the specified test.
-      * @param callbackfn A function that accepts up to three arguments. The every method calls
-      * the callbackfn function for each element in array1 until the callbackfn returns false,
-      * or until the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    every(callbackfn: (value: number, index: number, array: Int8Array) => boolean, thisArg?: any): boolean;
-
-    /**
-        * Returns the this object after filling the section identified by start and end with value
-        * @param value value to fill array section with
-        * @param start index to start filling the array at. If start is negative, it is treated as
-        * length+start where length is the length of the array.
-        * @param end index to stop filling the array at. If end is negative, it is treated as
-        * length+end.
-        */
-    fill(value: number, start?: number, end?: number): this;
-
-    /**
-      * Returns the elements of an array that meet the condition specified in a callback function.
-      * @param callbackfn A function that accepts up to three arguments. The filter method calls
-      * the callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    filter(callbackfn: (value: number, index: number, array: Int8Array) => any, thisArg?: any): Int8Array;
-
-    /**
-      * Returns the value of the first element in the array where predicate is true, and undefined
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found, find
-      * immediately returns that element value. Otherwise, find returns undefined.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
-
-    /**
-      * Returns the index of the first element in the array where predicate is true, and -1
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found,
-      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
-
-    /**
-      * Performs the specified action for each element in an array.
-      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    forEach(callbackfn: (value: number, index: number, array: Int8Array) => void, thisArg?: any): void;
-
-    /**
-      * Returns the index of the first occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      *  search starts at index 0.
-      */
-    indexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * Adds all the elements of an array separated by the specified separator string.
-      * @param separator A string used to separate one element of an array from the next in the
-      * resulting String. If omitted, the array elements are separated with a comma.
-      */
-    join(separator?: string): string;
-
-    /**
-      * Returns the index of the last occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      * search starts at index 0.
-      */
-    lastIndexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * The length of the array.
-      */
-    readonly length: number;
-
-    /**
-      * Calls a defined callback function on each element of an array, and returns an array that
-      * contains the results.
-      * @param callbackfn A function that accepts up to three arguments. The map method calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    map(callbackfn: (value: number, index: number, array: Int8Array) => number, thisArg?: any): Int8Array;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Int8Array) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Int8Array) => U, initialValue: U): U;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an
-      * argument instead of an array value.
-      */
-    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Int8Array) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Int8Array) => U, initialValue: U): U;
-
-    /**
-      * Reverses the elements in an Array.
-      */
-    reverse(): Int8Array;
-
-    /**
-      * Sets a value or an array of values.
-      * @param index The index of the location to set.
-      * @param value The value to set.
-      */
-    set(index: number, value: number): void;
-
-    /**
-      * Sets a value or an array of values.
-      * @param array A typed or untyped array of values to set.
-      * @param offset The index in the current array at which the values are to be written.
-      */
-    set(array: ArrayLike<number>, offset?: number): void;
-
-    /**
-      * Returns a section of an array.
-      * @param start The beginning of the specified portion of the array.
-      * @param end The end of the specified portion of the array.
-      */
-    slice(start?: number, end?: number): Int8Array;
-
-    /**
-      * Determines whether the specified callback function returns true for any element of an array.
-      * @param callbackfn A function that accepts up to three arguments. The some method calls the
-      * callbackfn function for each element in array1 until the callbackfn returns true, or until
-      * the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    some(callbackfn: (value: number, index: number, array: Int8Array) => boolean, thisArg?: any): boolean;
-
-    /**
-      * Sorts an array.
-      * @param compareFn The name of the function used to determine the order of the elements. If
-      * omitted, the elements are sorted in ascending, ASCII character order.
-      */
-    sort(compareFn?: (a: number, b: number) => number): this;
-
-    /**
-      * Gets a new Int8Array view of the ArrayBuffer store for this array, referencing the elements
-      * at begin, inclusive, up to end, exclusive.
-      * @param begin The index of the beginning of the array.
-      * @param end The index of the end of the array.
-      */
-    subarray(begin: number, end?: number): Int8Array;
-
-    /**
-      * Converts a number to a string by using the current locale.
-      */
-    toLocaleString(): string;
-
-    /**
-      * Returns a string representation of an array.
-      */
-    toString(): string;
-
-    [index: number]: number;
-}
-interface Int8ArrayConstructor {
-    readonly prototype: Int8Array;
-    new (length: number): Int8Array;
-    new (array: ArrayLike<number>): Int8Array;
-    new (buffer: ArrayBuffer, byteOffset?: number, length?: number): Int8Array;
-
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * Returns a new array from a set of elements.
-      * @param items A set of elements to include in the new array object.
-      */
-    of(...items: number[]): Int8Array;
-
-    /**
-      * Creates an array from an array-like or iterable object.
-      * @param arrayLike An array-like or iterable object to convert to an array.
-      * @param mapfn A mapping function to call on every element of the array.
-      * @param thisArg Value of 'this' used to invoke the mapfn.
-      */
-    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Int8Array;
-
-}
-declare const Int8Array: Int8ArrayConstructor;
-
-/**
-  * A typed array of 8-bit unsigned integer values. The contents are initialized to 0. If the
-  * requested number of bytes could not be allocated an exception is raised.
-  */
-interface Uint8Array {
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * The ArrayBuffer instance referenced by the array.
-      */
-    readonly buffer: ArrayBuffer;
-
-    /**
-      * The length in bytes of the array.
-      */
-    readonly byteLength: number;
-
-    /**
-      * The offset in bytes of the array.
-      */
-    readonly byteOffset: number;
-
-    /**
-      * Returns the this object after copying a section of the array identified by start and end
-      * to the same array starting at position target
-      * @param target If target is negative, it is treated as length+target where length is the
-      * length of the array.
-      * @param start If start is negative, it is treated as length+start. If end is negative, it
-      * is treated as length+end.
-      * @param end If not specified, length of the this object is used as its default value.
-      */
-    copyWithin(target: number, start: number, end?: number): this;
-
-    /**
-      * Determines whether all the members of an array satisfy the specified test.
-      * @param callbackfn A function that accepts up to three arguments. The every method calls
-      * the callbackfn function for each element in array1 until the callbackfn returns false,
-      * or until the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    every(callbackfn: (value: number, index: number, array: Uint8Array) => boolean, thisArg?: any): boolean;
-
-    /**
-        * Returns the this object after filling the section identified by start and end with value
-        * @param value value to fill array section with
-        * @param start index to start filling the array at. If start is negative, it is treated as
-        * length+start where length is the length of the array.
-        * @param end index to stop filling the array at. If end is negative, it is treated as
-        * length+end.
-        */
-    fill(value: number, start?: number, end?: number): this;
-
-    /**
-      * Returns the elements of an array that meet the condition specified in a callback function.
-      * @param callbackfn A function that accepts up to three arguments. The filter method calls
-      * the callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    filter(callbackfn: (value: number, index: number, array: Uint8Array) => any, thisArg?: any): Uint8Array;
-
-    /**
-      * Returns the value of the first element in the array where predicate is true, and undefined
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found, find
-      * immediately returns that element value. Otherwise, find returns undefined.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
-
-    /**
-      * Returns the index of the first element in the array where predicate is true, and -1
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found,
-      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
-
-    /**
-      * Performs the specified action for each element in an array.
-      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    forEach(callbackfn: (value: number, index: number, array: Uint8Array) => void, thisArg?: any): void;
-
-    /**
-      * Returns the index of the first occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      *  search starts at index 0.
-      */
-    indexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * Adds all the elements of an array separated by the specified separator string.
-      * @param separator A string used to separate one element of an array from the next in the
-      * resulting String. If omitted, the array elements are separated with a comma.
-      */
-    join(separator?: string): string;
-
-    /**
-      * Returns the index of the last occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      * search starts at index 0.
-      */
-    lastIndexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * The length of the array.
-      */
-    readonly length: number;
-
-    /**
-      * Calls a defined callback function on each element of an array, and returns an array that
-      * contains the results.
-      * @param callbackfn A function that accepts up to three arguments. The map method calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    map(callbackfn: (value: number, index: number, array: Uint8Array) => number, thisArg?: any): Uint8Array;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Uint8Array) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Uint8Array) => U, initialValue: U): U;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an
-      * argument instead of an array value.
-      */
-    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Uint8Array) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Uint8Array) => U, initialValue: U): U;
-
-    /**
-      * Reverses the elements in an Array.
-      */
-    reverse(): Uint8Array;
-
-    /**
-      * Sets a value or an array of values.
-      * @param index The index of the location to set.
-      * @param value The value to set.
-      */
-    set(index: number, value: number): void;
-
-    /**
-      * Sets a value or an array of values.
-      * @param array A typed or untyped array of values to set.
-      * @param offset The index in the current array at which the values are to be written.
-      */
-    set(array: ArrayLike<number>, offset?: number): void;
-
-    /**
-      * Returns a section of an array.
-      * @param start The beginning of the specified portion of the array.
-      * @param end The end of the specified portion of the array.
-      */
-    slice(start?: number, end?: number): Uint8Array;
-
-    /**
-      * Determines whether the specified callback function returns true for any element of an array.
-      * @param callbackfn A function that accepts up to three arguments. The some method calls the
-      * callbackfn function for each element in array1 until the callbackfn returns true, or until
-      * the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    some(callbackfn: (value: number, index: number, array: Uint8Array) => boolean, thisArg?: any): boolean;
-
-    /**
-      * Sorts an array.
-      * @param compareFn The name of the function used to determine the order of the elements. If
-      * omitted, the elements are sorted in ascending, ASCII character order.
-      */
-    sort(compareFn?: (a: number, b: number) => number): this;
-
-    /**
-      * Gets a new Uint8Array view of the ArrayBuffer store for this array, referencing the elements
-      * at begin, inclusive, up to end, exclusive.
-      * @param begin The index of the beginning of the array.
-      * @param end The index of the end of the array.
-      */
-    subarray(begin: number, end?: number): Uint8Array;
-
-    /**
-      * Converts a number to a string by using the current locale.
-      */
-    toLocaleString(): string;
-
-    /**
-      * Returns a string representation of an array.
-      */
-    toString(): string;
-
-    [index: number]: number;
-}
-
-interface Uint8ArrayConstructor {
-    readonly prototype: Uint8Array;
-    new (length: number): Uint8Array;
-    new (array: ArrayLike<number>): Uint8Array;
-    new (buffer: ArrayBuffer, byteOffset?: number, length?: number): Uint8Array;
-
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * Returns a new array from a set of elements.
-      * @param items A set of elements to include in the new array object.
-      */
-    of(...items: number[]): Uint8Array;
-
-    /**
-      * Creates an array from an array-like or iterable object.
-      * @param arrayLike An array-like or iterable object to convert to an array.
-      * @param mapfn A mapping function to call on every element of the array.
-      * @param thisArg Value of 'this' used to invoke the mapfn.
-      */
-    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Uint8Array;
-
-}
-declare const Uint8Array: Uint8ArrayConstructor;
-
-/**
-  * A typed array of 8-bit unsigned integer (clamped) values. The contents are initialized to 0.
-  * If the requested number of bytes could not be allocated an exception is raised.
-  */
-interface Uint8ClampedArray {
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * The ArrayBuffer instance referenced by the array.
-      */
-    readonly buffer: ArrayBuffer;
-
-    /**
-      * The length in bytes of the array.
-      */
-    readonly byteLength: number;
-
-    /**
-      * The offset in bytes of the array.
-      */
-    readonly byteOffset: number;
-
-    /**
-      * Returns the this object after copying a section of the array identified by start and end
-      * to the same array starting at position target
-      * @param target If target is negative, it is treated as length+target where length is the
-      * length of the array.
-      * @param start If start is negative, it is treated as length+start. If end is negative, it
-      * is treated as length+end.
-      * @param end If not specified, length of the this object is used as its default value.
-      */
-    copyWithin(target: number, start: number, end?: number): this;
-
-    /**
-      * Determines whether all the members of an array satisfy the specified test.
-      * @param callbackfn A function that accepts up to three arguments. The every method calls
-      * the callbackfn function for each element in array1 until the callbackfn returns false,
-      * or until the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    every(callbackfn: (value: number, index: number, array: Uint8ClampedArray) => boolean, thisArg?: any): boolean;
-
-    /**
-        * Returns the this object after filling the section identified by start and end with value
-        * @param value value to fill array section with
-        * @param start index to start filling the array at. If start is negative, it is treated as
-        * length+start where length is the length of the array.
-        * @param end index to stop filling the array at. If end is negative, it is treated as
-        * length+end.
-        */
-    fill(value: number, start?: number, end?: number): this;
-
-    /**
-      * Returns the elements of an array that meet the condition specified in a callback function.
-      * @param callbackfn A function that accepts up to three arguments. The filter method calls
-      * the callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    filter(callbackfn: (value: number, index: number, array: Uint8ClampedArray) => any, thisArg?: any): Uint8ClampedArray;
-
-    /**
-      * Returns the value of the first element in the array where predicate is true, and undefined
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found, find
-      * immediately returns that element value. Otherwise, find returns undefined.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
-
-    /**
-      * Returns the index of the first element in the array where predicate is true, and -1
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found,
-      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
-
-    /**
-      * Performs the specified action for each element in an array.
-      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    forEach(callbackfn: (value: number, index: number, array: Uint8ClampedArray) => void, thisArg?: any): void;
-
-    /**
-      * Returns the index of the first occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      *  search starts at index 0.
-      */
-    indexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * Adds all the elements of an array separated by the specified separator string.
-      * @param separator A string used to separate one element of an array from the next in the
-      * resulting String. If omitted, the array elements are separated with a comma.
-      */
-    join(separator?: string): string;
-
-    /**
-      * Returns the index of the last occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      * search starts at index 0.
-      */
-    lastIndexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * The length of the array.
-      */
-    readonly length: number;
-
-    /**
-      * Calls a defined callback function on each element of an array, and returns an array that
-      * contains the results.
-      * @param callbackfn A function that accepts up to three arguments. The map method calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    map(callbackfn: (value: number, index: number, array: Uint8ClampedArray) => number, thisArg?: any): Uint8ClampedArray;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Uint8ClampedArray) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Uint8ClampedArray) => U, initialValue: U): U;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an
-      * argument instead of an array value.
-      */
-    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Uint8ClampedArray) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Uint8ClampedArray) => U, initialValue: U): U;
-
-    /**
-      * Reverses the elements in an Array.
-      */
-    reverse(): Uint8ClampedArray;
-
-    /**
-      * Sets a value or an array of values.
-      * @param index The index of the location to set.
-      * @param value The value to set.
-      */
-    set(index: number, value: number): void;
-
-    /**
-      * Sets a value or an array of values.
-      * @param array A typed or untyped array of values to set.
-      * @param offset The index in the current array at which the values are to be written.
-      */
-    set(array: Uint8ClampedArray, offset?: number): void;
-
-    /**
-      * Returns a section of an array.
-      * @param start The beginning of the specified portion of the array.
-      * @param end The end of the specified portion of the array.
-      */
-    slice(start?: number, end?: number): Uint8ClampedArray;
-
-    /**
-      * Determines whether the specified callback function returns true for any element of an array.
-      * @param callbackfn A function that accepts up to three arguments. The some method calls the
-      * callbackfn function for each element in array1 until the callbackfn returns true, or until
-      * the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    some(callbackfn: (value: number, index: number, array: Uint8ClampedArray) => boolean, thisArg?: any): boolean;
-
-    /**
-      * Sorts an array.
-      * @param compareFn The name of the function used to determine the order of the elements. If
-      * omitted, the elements are sorted in ascending, ASCII character order.
-      */
-    sort(compareFn?: (a: number, b: number) => number): this;
-
-    /**
-      * Gets a new Uint8ClampedArray view of the ArrayBuffer store for this array, referencing the elements
-      * at begin, inclusive, up to end, exclusive.
-      * @param begin The index of the beginning of the array.
-      * @param end The index of the end of the array.
-      */
-    subarray(begin: number, end?: number): Uint8ClampedArray;
-
-    /**
-      * Converts a number to a string by using the current locale.
-      */
-    toLocaleString(): string;
-
-    /**
-      * Returns a string representation of an array.
-      */
-    toString(): string;
-
-    [index: number]: number;
-}
-
-interface Uint8ClampedArrayConstructor {
-    readonly prototype: Uint8ClampedArray;
-    new (length: number): Uint8ClampedArray;
-    new (array: ArrayLike<number>): Uint8ClampedArray;
-    new (buffer: ArrayBuffer, byteOffset?: number, length?: number): Uint8ClampedArray;
-
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * Returns a new array from a set of elements.
-      * @param items A set of elements to include in the new array object.
-      */
-    of(...items: number[]): Uint8ClampedArray;
-
-    /**
-      * Creates an array from an array-like or iterable object.
-      * @param arrayLike An array-like or iterable object to convert to an array.
-      * @param mapfn A mapping function to call on every element of the array.
-      * @param thisArg Value of 'this' used to invoke the mapfn.
-      */
-    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Uint8ClampedArray;
-}
-declare const Uint8ClampedArray: Uint8ClampedArrayConstructor;
-
-/**
-  * A typed array of 16-bit signed integer values. The contents are initialized to 0. If the
-  * requested number of bytes could not be allocated an exception is raised.
-  */
-interface Int16Array {
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * The ArrayBuffer instance referenced by the array.
-      */
-    readonly buffer: ArrayBuffer;
-
-    /**
-      * The length in bytes of the array.
-      */
-    readonly byteLength: number;
-
-    /**
-      * The offset in bytes of the array.
-      */
-    readonly byteOffset: number;
-
-    /**
-      * Returns the this object after copying a section of the array identified by start and end
-      * to the same array starting at position target
-      * @param target If target is negative, it is treated as length+target where length is the
-      * length of the array.
-      * @param start If start is negative, it is treated as length+start. If end is negative, it
-      * is treated as length+end.
-      * @param end If not specified, length of the this object is used as its default value.
-      */
-    copyWithin(target: number, start: number, end?: number): this;
-
-    /**
-      * Determines whether all the members of an array satisfy the specified test.
-      * @param callbackfn A function that accepts up to three arguments. The every method calls
-      * the callbackfn function for each element in array1 until the callbackfn returns false,
-      * or until the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    every(callbackfn: (value: number, index: number, array: Int16Array) => boolean, thisArg?: any): boolean;
-
-    /**
-        * Returns the this object after filling the section identified by start and end with value
-        * @param value value to fill array section with
-        * @param start index to start filling the array at. If start is negative, it is treated as
-        * length+start where length is the length of the array.
-        * @param end index to stop filling the array at. If end is negative, it is treated as
-        * length+end.
-        */
-    fill(value: number, start?: number, end?: number): this;
-
-    /**
-      * Returns the elements of an array that meet the condition specified in a callback function.
-      * @param callbackfn A function that accepts up to three arguments. The filter method calls
-      * the callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    filter(callbackfn: (value: number, index: number, array: Int16Array) => any, thisArg?: any): Int16Array;
-
-    /**
-      * Returns the value of the first element in the array where predicate is true, and undefined
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found, find
-      * immediately returns that element value. Otherwise, find returns undefined.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
-
-    /**
-      * Returns the index of the first element in the array where predicate is true, and -1
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found,
-      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
-
-    /**
-      * Performs the specified action for each element in an array.
-      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    forEach(callbackfn: (value: number, index: number, array: Int16Array) => void, thisArg?: any): void;
-
-    /**
-      * Returns the index of the first occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      *  search starts at index 0.
-      */
-    indexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * Adds all the elements of an array separated by the specified separator string.
-      * @param separator A string used to separate one element of an array from the next in the
-      * resulting String. If omitted, the array elements are separated with a comma.
-      */
-    join(separator?: string): string;
-
-    /**
-      * Returns the index of the last occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      * search starts at index 0.
-      */
-    lastIndexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * The length of the array.
-      */
-    readonly length: number;
-
-    /**
-      * Calls a defined callback function on each element of an array, and returns an array that
-      * contains the results.
-      * @param callbackfn A function that accepts up to three arguments. The map method calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    map(callbackfn: (value: number, index: number, array: Int16Array) => number, thisArg?: any): Int16Array;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Int16Array) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Int16Array) => U, initialValue: U): U;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an
-      * argument instead of an array value.
-      */
-    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Int16Array) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Int16Array) => U, initialValue: U): U;
-
-    /**
-      * Reverses the elements in an Array.
-      */
-    reverse(): Int16Array;
-
-    /**
-      * Sets a value or an array of values.
-      * @param index The index of the location to set.
-      * @param value The value to set.
-      */
-    set(index: number, value: number): void;
-
-    /**
-      * Sets a value or an array of values.
-      * @param array A typed or untyped array of values to set.
-      * @param offset The index in the current array at which the values are to be written.
-      */
-    set(array: ArrayLike<number>, offset?: number): void;
-
-    /**
-      * Returns a section of an array.
-      * @param start The beginning of the specified portion of the array.
-      * @param end The end of the specified portion of the array.
-      */
-    slice(start?: number, end?: number): Int16Array;
-
-    /**
-      * Determines whether the specified callback function returns true for any element of an array.
-      * @param callbackfn A function that accepts up to three arguments. The some method calls the
-      * callbackfn function for each element in array1 until the callbackfn returns true, or until
-      * the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    some(callbackfn: (value: number, index: number, array: Int16Array) => boolean, thisArg?: any): boolean;
-
-    /**
-      * Sorts an array.
-      * @param compareFn The name of the function used to determine the order of the elements. If
-      * omitted, the elements are sorted in ascending, ASCII character order.
-      */
-    sort(compareFn?: (a: number, b: number) => number): this;
-
-    /**
-      * Gets a new Int16Array view of the ArrayBuffer store for this array, referencing the elements
-      * at begin, inclusive, up to end, exclusive.
-      * @param begin The index of the beginning of the array.
-      * @param end The index of the end of the array.
-      */
-    subarray(begin: number, end?: number): Int16Array;
-
-    /**
-      * Converts a number to a string by using the current locale.
-      */
-    toLocaleString(): string;
-
-    /**
-      * Returns a string representation of an array.
-      */
-    toString(): string;
-
-    [index: number]: number;
-}
-
-interface Int16ArrayConstructor {
-    readonly prototype: Int16Array;
-    new (length: number): Int16Array;
-    new (array: ArrayLike<number>): Int16Array;
-    new (buffer: ArrayBuffer, byteOffset?: number, length?: number): Int16Array;
-
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * Returns a new array from a set of elements.
-      * @param items A set of elements to include in the new array object.
-      */
-    of(...items: number[]): Int16Array;
-
-    /**
-      * Creates an array from an array-like or iterable object.
-      * @param arrayLike An array-like or iterable object to convert to an array.
-      * @param mapfn A mapping function to call on every element of the array.
-      * @param thisArg Value of 'this' used to invoke the mapfn.
-      */
-    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Int16Array;
-
-}
-declare const Int16Array: Int16ArrayConstructor;
-
-/**
-  * A typed array of 16-bit unsigned integer values. The contents are initialized to 0. If the
-  * requested number of bytes could not be allocated an exception is raised.
-  */
-interface Uint16Array {
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * The ArrayBuffer instance referenced by the array.
-      */
-    readonly buffer: ArrayBuffer;
-
-    /**
-      * The length in bytes of the array.
-      */
-    readonly byteLength: number;
-
-    /**
-      * The offset in bytes of the array.
-      */
-    readonly byteOffset: number;
-
-    /**
-      * Returns the this object after copying a section of the array identified by start and end
-      * to the same array starting at position target
-      * @param target If target is negative, it is treated as length+target where length is the
-      * length of the array.
-      * @param start If start is negative, it is treated as length+start. If end is negative, it
-      * is treated as length+end.
-      * @param end If not specified, length of the this object is used as its default value.
-      */
-    copyWithin(target: number, start: number, end?: number): this;
-
-    /**
-      * Determines whether all the members of an array satisfy the specified test.
-      * @param callbackfn A function that accepts up to three arguments. The every method calls
-      * the callbackfn function for each element in array1 until the callbackfn returns false,
-      * or until the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    every(callbackfn: (value: number, index: number, array: Uint16Array) => boolean, thisArg?: any): boolean;
-
-    /**
-        * Returns the this object after filling the section identified by start and end with value
-        * @param value value to fill array section with
-        * @param start index to start filling the array at. If start is negative, it is treated as
-        * length+start where length is the length of the array.
-        * @param end index to stop filling the array at. If end is negative, it is treated as
-        * length+end.
-        */
-    fill(value: number, start?: number, end?: number): this;
-
-    /**
-      * Returns the elements of an array that meet the condition specified in a callback function.
-      * @param callbackfn A function that accepts up to three arguments. The filter method calls
-      * the callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    filter(callbackfn: (value: number, index: number, array: Uint16Array) => any, thisArg?: any): Uint16Array;
-
-    /**
-      * Returns the value of the first element in the array where predicate is true, and undefined
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found, find
-      * immediately returns that element value. Otherwise, find returns undefined.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
-
-    /**
-      * Returns the index of the first element in the array where predicate is true, and -1
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found,
-      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
-
-    /**
-      * Performs the specified action for each element in an array.
-      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    forEach(callbackfn: (value: number, index: number, array: Uint16Array) => void, thisArg?: any): void;
-
-    /**
-      * Returns the index of the first occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      *  search starts at index 0.
-      */
-    indexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * Adds all the elements of an array separated by the specified separator string.
-      * @param separator A string used to separate one element of an array from the next in the
-      * resulting String. If omitted, the array elements are separated with a comma.
-      */
-    join(separator?: string): string;
-
-    /**
-      * Returns the index of the last occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      * search starts at index 0.
-      */
-    lastIndexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * The length of the array.
-      */
-    readonly length: number;
-
-    /**
-      * Calls a defined callback function on each element of an array, and returns an array that
-      * contains the results.
-      * @param callbackfn A function that accepts up to three arguments. The map method calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    map(callbackfn: (value: number, index: number, array: Uint16Array) => number, thisArg?: any): Uint16Array;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Uint16Array) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Uint16Array) => U, initialValue: U): U;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an
-      * argument instead of an array value.
-      */
-    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Uint16Array) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Uint16Array) => U, initialValue: U): U;
-
-    /**
-      * Reverses the elements in an Array.
-      */
-    reverse(): Uint16Array;
-
-    /**
-      * Sets a value or an array of values.
-      * @param index The index of the location to set.
-      * @param value The value to set.
-      */
-    set(index: number, value: number): void;
-
-    /**
-      * Sets a value or an array of values.
-      * @param array A typed or untyped array of values to set.
-      * @param offset The index in the current array at which the values are to be written.
-      */
-    set(array: ArrayLike<number>, offset?: number): void;
-
-    /**
-      * Returns a section of an array.
-      * @param start The beginning of the specified portion of the array.
-      * @param end The end of the specified portion of the array.
-      */
-    slice(start?: number, end?: number): Uint16Array;
-
-    /**
-      * Determines whether the specified callback function returns true for any element of an array.
-      * @param callbackfn A function that accepts up to three arguments. The some method calls the
-      * callbackfn function for each element in array1 until the callbackfn returns true, or until
-      * the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    some(callbackfn: (value: number, index: number, array: Uint16Array) => boolean, thisArg?: any): boolean;
-
-    /**
-      * Sorts an array.
-      * @param compareFn The name of the function used to determine the order of the elements. If
-      * omitted, the elements are sorted in ascending, ASCII character order.
-      */
-    sort(compareFn?: (a: number, b: number) => number): this;
-
-    /**
-      * Gets a new Uint16Array view of the ArrayBuffer store for this array, referencing the elements
-      * at begin, inclusive, up to end, exclusive.
-      * @param begin The index of the beginning of the array.
-      * @param end The index of the end of the array.
-      */
-    subarray(begin: number, end?: number): Uint16Array;
-
-    /**
-      * Converts a number to a string by using the current locale.
-      */
-    toLocaleString(): string;
-
-    /**
-      * Returns a string representation of an array.
-      */
-    toString(): string;
-
-    [index: number]: number;
-}
-
-interface Uint16ArrayConstructor {
-    readonly prototype: Uint16Array;
-    new (length: number): Uint16Array;
-    new (array: ArrayLike<number>): Uint16Array;
-    new (buffer: ArrayBuffer, byteOffset?: number, length?: number): Uint16Array;
-
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * Returns a new array from a set of elements.
-      * @param items A set of elements to include in the new array object.
-      */
-    of(...items: number[]): Uint16Array;
-
-    /**
-      * Creates an array from an array-like or iterable object.
-      * @param arrayLike An array-like or iterable object to convert to an array.
-      * @param mapfn A mapping function to call on every element of the array.
-      * @param thisArg Value of 'this' used to invoke the mapfn.
-      */
-    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Uint16Array;
-
-}
-declare const Uint16Array: Uint16ArrayConstructor;
-/**
-  * A typed array of 32-bit signed integer values. The contents are initialized to 0. If the
-  * requested number of bytes could not be allocated an exception is raised.
-  */
-interface Int32Array {
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * The ArrayBuffer instance referenced by the array.
-      */
-    readonly buffer: ArrayBuffer;
-
-    /**
-      * The length in bytes of the array.
-      */
-    readonly byteLength: number;
-
-    /**
-      * The offset in bytes of the array.
-      */
-    readonly byteOffset: number;
-
-    /**
-      * Returns the this object after copying a section of the array identified by start and end
-      * to the same array starting at position target
-      * @param target If target is negative, it is treated as length+target where length is the
-      * length of the array.
-      * @param start If start is negative, it is treated as length+start. If end is negative, it
-      * is treated as length+end.
-      * @param end If not specified, length of the this object is used as its default value.
-      */
-    copyWithin(target: number, start: number, end?: number): this;
-
-    /**
-      * Determines whether all the members of an array satisfy the specified test.
-      * @param callbackfn A function that accepts up to three arguments. The every method calls
-      * the callbackfn function for each element in array1 until the callbackfn returns false,
-      * or until the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    every(callbackfn: (value: number, index: number, array: Int32Array) => boolean, thisArg?: any): boolean;
-
-    /**
-        * Returns the this object after filling the section identified by start and end with value
-        * @param value value to fill array section with
-        * @param start index to start filling the array at. If start is negative, it is treated as
-        * length+start where length is the length of the array.
-        * @param end index to stop filling the array at. If end is negative, it is treated as
-        * length+end.
-        */
-    fill(value: number, start?: number, end?: number): this;
-
-    /**
-      * Returns the elements of an array that meet the condition specified in a callback function.
-      * @param callbackfn A function that accepts up to three arguments. The filter method calls
-      * the callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    filter(callbackfn: (value: number, index: number, array: Int32Array) => any, thisArg?: any): Int32Array;
-
-    /**
-      * Returns the value of the first element in the array where predicate is true, and undefined
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found, find
-      * immediately returns that element value. Otherwise, find returns undefined.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
-
-    /**
-      * Returns the index of the first element in the array where predicate is true, and -1
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found,
-      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
-
-    /**
-      * Performs the specified action for each element in an array.
-      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    forEach(callbackfn: (value: number, index: number, array: Int32Array) => void, thisArg?: any): void;
-
-    /**
-      * Returns the index of the first occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      *  search starts at index 0.
-      */
-    indexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * Adds all the elements of an array separated by the specified separator string.
-      * @param separator A string used to separate one element of an array from the next in the
-      * resulting String. If omitted, the array elements are separated with a comma.
-      */
-    join(separator?: string): string;
-
-    /**
-      * Returns the index of the last occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      * search starts at index 0.
-      */
-    lastIndexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * The length of the array.
-      */
-    readonly length: number;
-
-    /**
-      * Calls a defined callback function on each element of an array, and returns an array that
-      * contains the results.
-      * @param callbackfn A function that accepts up to three arguments. The map method calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    map(callbackfn: (value: number, index: number, array: Int32Array) => number, thisArg?: any): Int32Array;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Int32Array) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Int32Array) => U, initialValue: U): U;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an
-      * argument instead of an array value.
-      */
-    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Int32Array) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Int32Array) => U, initialValue: U): U;
-
-    /**
-      * Reverses the elements in an Array.
-      */
-    reverse(): Int32Array;
-
-    /**
-      * Sets a value or an array of values.
-      * @param index The index of the location to set.
-      * @param value The value to set.
-      */
-    set(index: number, value: number): void;
-
-    /**
-      * Sets a value or an array of values.
-      * @param array A typed or untyped array of values to set.
-      * @param offset The index in the current array at which the values are to be written.
-      */
-    set(array: ArrayLike<number>, offset?: number): void;
-
-    /**
-      * Returns a section of an array.
-      * @param start The beginning of the specified portion of the array.
-      * @param end The end of the specified portion of the array.
-      */
-    slice(start?: number, end?: number): Int32Array;
-
-    /**
-      * Determines whether the specified callback function returns true for any element of an array.
-      * @param callbackfn A function that accepts up to three arguments. The some method calls the
-      * callbackfn function for each element in array1 until the callbackfn returns true, or until
-      * the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    some(callbackfn: (value: number, index: number, array: Int32Array) => boolean, thisArg?: any): boolean;
-
-    /**
-      * Sorts an array.
-      * @param compareFn The name of the function used to determine the order of the elements. If
-      * omitted, the elements are sorted in ascending, ASCII character order.
-      */
-    sort(compareFn?: (a: number, b: number) => number): this;
-
-    /**
-      * Gets a new Int32Array view of the ArrayBuffer store for this array, referencing the elements
-      * at begin, inclusive, up to end, exclusive.
-      * @param begin The index of the beginning of the array.
-      * @param end The index of the end of the array.
-      */
-    subarray(begin: number, end?: number): Int32Array;
-
-    /**
-      * Converts a number to a string by using the current locale.
-      */
-    toLocaleString(): string;
-
-    /**
-      * Returns a string representation of an array.
-      */
-    toString(): string;
-
-    [index: number]: number;
-}
-
-interface Int32ArrayConstructor {
-    readonly prototype: Int32Array;
-    new (length: number): Int32Array;
-    new (array: ArrayLike<number>): Int32Array;
-    new (buffer: ArrayBuffer, byteOffset?: number, length?: number): Int32Array;
-
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * Returns a new array from a set of elements.
-      * @param items A set of elements to include in the new array object.
-      */
-    of(...items: number[]): Int32Array;
-
-    /**
-      * Creates an array from an array-like or iterable object.
-      * @param arrayLike An array-like or iterable object to convert to an array.
-      * @param mapfn A mapping function to call on every element of the array.
-      * @param thisArg Value of 'this' used to invoke the mapfn.
-      */
-    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Int32Array;
-}
-declare const Int32Array: Int32ArrayConstructor;
-
-/**
-  * A typed array of 32-bit unsigned integer values. The contents are initialized to 0. If the
-  * requested number of bytes could not be allocated an exception is raised.
-  */
-interface Uint32Array {
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * The ArrayBuffer instance referenced by the array.
-      */
-    readonly buffer: ArrayBuffer;
-
-    /**
-      * The length in bytes of the array.
-      */
-    readonly byteLength: number;
-
-    /**
-      * The offset in bytes of the array.
-      */
-    readonly byteOffset: number;
-
-    /**
-      * Returns the this object after copying a section of the array identified by start and end
-      * to the same array starting at position target
-      * @param target If target is negative, it is treated as length+target where length is the
-      * length of the array.
-      * @param start If start is negative, it is treated as length+start. If end is negative, it
-      * is treated as length+end.
-      * @param end If not specified, length of the this object is used as its default value.
-      */
-    copyWithin(target: number, start: number, end?: number): this;
-
-    /**
-      * Determines whether all the members of an array satisfy the specified test.
-      * @param callbackfn A function that accepts up to three arguments. The every method calls
-      * the callbackfn function for each element in array1 until the callbackfn returns false,
-      * or until the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    every(callbackfn: (value: number, index: number, array: Uint32Array) => boolean, thisArg?: any): boolean;
-
-    /**
-        * Returns the this object after filling the section identified by start and end with value
-        * @param value value to fill array section with
-        * @param start index to start filling the array at. If start is negative, it is treated as
-        * length+start where length is the length of the array.
-        * @param end index to stop filling the array at. If end is negative, it is treated as
-        * length+end.
-        */
-    fill(value: number, start?: number, end?: number): this;
-
-    /**
-      * Returns the elements of an array that meet the condition specified in a callback function.
-      * @param callbackfn A function that accepts up to three arguments. The filter method calls
-      * the callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    filter(callbackfn: (value: number, index: number, array: Uint32Array) => any, thisArg?: any): Uint32Array;
-
-    /**
-      * Returns the value of the first element in the array where predicate is true, and undefined
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found, find
-      * immediately returns that element value. Otherwise, find returns undefined.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
-
-    /**
-      * Returns the index of the first element in the array where predicate is true, and -1
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found,
-      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
-
-    /**
-      * Performs the specified action for each element in an array.
-      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    forEach(callbackfn: (value: number, index: number, array: Uint32Array) => void, thisArg?: any): void;
-
-    /**
-      * Returns the index of the first occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      *  search starts at index 0.
-      */
-    indexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * Adds all the elements of an array separated by the specified separator string.
-      * @param separator A string used to separate one element of an array from the next in the
-      * resulting String. If omitted, the array elements are separated with a comma.
-      */
-    join(separator?: string): string;
-
-    /**
-      * Returns the index of the last occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      * search starts at index 0.
-      */
-    lastIndexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * The length of the array.
-      */
-    readonly length: number;
-
-    /**
-      * Calls a defined callback function on each element of an array, and returns an array that
-      * contains the results.
-      * @param callbackfn A function that accepts up to three arguments. The map method calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    map(callbackfn: (value: number, index: number, array: Uint32Array) => number, thisArg?: any): Uint32Array;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Uint32Array) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Uint32Array) => U, initialValue: U): U;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an
-      * argument instead of an array value.
-      */
-    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Uint32Array) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Uint32Array) => U, initialValue: U): U;
-
-    /**
-      * Reverses the elements in an Array.
-      */
-    reverse(): Uint32Array;
-
-    /**
-      * Sets a value or an array of values.
-      * @param index The index of the location to set.
-      * @param value The value to set.
-      */
-    set(index: number, value: number): void;
-
-    /**
-      * Sets a value or an array of values.
-      * @param array A typed or untyped array of values to set.
-      * @param offset The index in the current array at which the values are to be written.
-      */
-    set(array: ArrayLike<number>, offset?: number): void;
-
-    /**
-      * Returns a section of an array.
-      * @param start The beginning of the specified portion of the array.
-      * @param end The end of the specified portion of the array.
-      */
-    slice(start?: number, end?: number): Uint32Array;
-
-    /**
-      * Determines whether the specified callback function returns true for any element of an array.
-      * @param callbackfn A function that accepts up to three arguments. The some method calls the
-      * callbackfn function for each element in array1 until the callbackfn returns true, or until
-      * the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    some(callbackfn: (value: number, index: number, array: Uint32Array) => boolean, thisArg?: any): boolean;
-
-    /**
-      * Sorts an array.
-      * @param compareFn The name of the function used to determine the order of the elements. If
-      * omitted, the elements are sorted in ascending, ASCII character order.
-      */
-    sort(compareFn?: (a: number, b: number) => number): this;
-
-    /**
-      * Gets a new Uint32Array view of the ArrayBuffer store for this array, referencing the elements
-      * at begin, inclusive, up to end, exclusive.
-      * @param begin The index of the beginning of the array.
-      * @param end The index of the end of the array.
-      */
-    subarray(begin: number, end?: number): Uint32Array;
-
-    /**
-      * Converts a number to a string by using the current locale.
-      */
-    toLocaleString(): string;
-
-    /**
-      * Returns a string representation of an array.
-      */
-    toString(): string;
-
-    [index: number]: number;
-}
-
-interface Uint32ArrayConstructor {
-    readonly prototype: Uint32Array;
-    new (length: number): Uint32Array;
-    new (array: ArrayLike<number>): Uint32Array;
-    new (buffer: ArrayBuffer, byteOffset?: number, length?: number): Uint32Array;
-
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * Returns a new array from a set of elements.
-      * @param items A set of elements to include in the new array object.
-      */
-    of(...items: number[]): Uint32Array;
-
-    /**
-      * Creates an array from an array-like or iterable object.
-      * @param arrayLike An array-like or iterable object to convert to an array.
-      * @param mapfn A mapping function to call on every element of the array.
-      * @param thisArg Value of 'this' used to invoke the mapfn.
-      */
-    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Uint32Array;
-}
-declare const Uint32Array: Uint32ArrayConstructor;
-
-/**
-  * A typed array of 32-bit float values. The contents are initialized to 0. If the requested number
-  * of bytes could not be allocated an exception is raised.
-  */
-interface Float32Array {
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * The ArrayBuffer instance referenced by the array.
-      */
-    readonly buffer: ArrayBuffer;
-
-    /**
-      * The length in bytes of the array.
-      */
-    readonly byteLength: number;
-
-    /**
-      * The offset in bytes of the array.
-      */
-    readonly byteOffset: number;
-
-    /**
-      * Returns the this object after copying a section of the array identified by start and end
-      * to the same array starting at position target
-      * @param target If target is negative, it is treated as length+target where length is the
-      * length of the array.
-      * @param start If start is negative, it is treated as length+start. If end is negative, it
-      * is treated as length+end.
-      * @param end If not specified, length of the this object is used as its default value.
-      */
-    copyWithin(target: number, start: number, end?: number): this;
-
-    /**
-      * Determines whether all the members of an array satisfy the specified test.
-      * @param callbackfn A function that accepts up to three arguments. The every method calls
-      * the callbackfn function for each element in array1 until the callbackfn returns false,
-      * or until the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    every(callbackfn: (value: number, index: number, array: Float32Array) => boolean, thisArg?: any): boolean;
-
-    /**
-        * Returns the this object after filling the section identified by start and end with value
-        * @param value value to fill array section with
-        * @param start index to start filling the array at. If start is negative, it is treated as
-        * length+start where length is the length of the array.
-        * @param end index to stop filling the array at. If end is negative, it is treated as
-        * length+end.
-        */
-    fill(value: number, start?: number, end?: number): this;
-
-    /**
-      * Returns the elements of an array that meet the condition specified in a callback function.
-      * @param callbackfn A function that accepts up to three arguments. The filter method calls
-      * the callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    filter(callbackfn: (value: number, index: number, array: Float32Array) => any, thisArg?: any): Float32Array;
-
-    /**
-      * Returns the value of the first element in the array where predicate is true, and undefined
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found, find
-      * immediately returns that element value. Otherwise, find returns undefined.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
-
-    /**
-      * Returns the index of the first element in the array where predicate is true, and -1
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found,
-      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
-
-    /**
-      * Performs the specified action for each element in an array.
-      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    forEach(callbackfn: (value: number, index: number, array: Float32Array) => void, thisArg?: any): void;
-
-    /**
-      * Returns the index of the first occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      *  search starts at index 0.
-      */
-    indexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * Adds all the elements of an array separated by the specified separator string.
-      * @param separator A string used to separate one element of an array from the next in the
-      * resulting String. If omitted, the array elements are separated with a comma.
-      */
-    join(separator?: string): string;
-
-    /**
-      * Returns the index of the last occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      * search starts at index 0.
-      */
-    lastIndexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * The length of the array.
-      */
-    readonly length: number;
-
-    /**
-      * Calls a defined callback function on each element of an array, and returns an array that
-      * contains the results.
-      * @param callbackfn A function that accepts up to three arguments. The map method calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    map(callbackfn: (value: number, index: number, array: Float32Array) => number, thisArg?: any): Float32Array;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Float32Array) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Float32Array) => U, initialValue: U): U;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an
-      * argument instead of an array value.
-      */
-    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Float32Array) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Float32Array) => U, initialValue: U): U;
-
-    /**
-      * Reverses the elements in an Array.
-      */
-    reverse(): Float32Array;
-
-    /**
-      * Sets a value or an array of values.
-      * @param index The index of the location to set.
-      * @param value The value to set.
-      */
-    set(index: number, value: number): void;
-
-    /**
-      * Sets a value or an array of values.
-      * @param array A typed or untyped array of values to set.
-      * @param offset The index in the current array at which the values are to be written.
-      */
-    set(array: ArrayLike<number>, offset?: number): void;
-
-    /**
-      * Returns a section of an array.
-      * @param start The beginning of the specified portion of the array.
-      * @param end The end of the specified portion of the array.
-      */
-    slice(start?: number, end?: number): Float32Array;
-
-    /**
-      * Determines whether the specified callback function returns true for any element of an array.
-      * @param callbackfn A function that accepts up to three arguments. The some method calls the
-      * callbackfn function for each element in array1 until the callbackfn returns true, or until
-      * the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    some(callbackfn: (value: number, index: number, array: Float32Array) => boolean, thisArg?: any): boolean;
-
-    /**
-      * Sorts an array.
-      * @param compareFn The name of the function used to determine the order of the elements. If
-      * omitted, the elements are sorted in ascending, ASCII character order.
-      */
-    sort(compareFn?: (a: number, b: number) => number): this;
-
-    /**
-      * Gets a new Float32Array view of the ArrayBuffer store for this array, referencing the elements
-      * at begin, inclusive, up to end, exclusive.
-      * @param begin The index of the beginning of the array.
-      * @param end The index of the end of the array.
-      */
-    subarray(begin: number, end?: number): Float32Array;
-
-    /**
-      * Converts a number to a string by using the current locale.
-      */
-    toLocaleString(): string;
-
-    /**
-      * Returns a string representation of an array.
-      */
-    toString(): string;
-
-    [index: number]: number;
-}
-
-interface Float32ArrayConstructor {
-    readonly prototype: Float32Array;
-    new (length: number): Float32Array;
-    new (array: ArrayLike<number>): Float32Array;
-    new (buffer: ArrayBuffer, byteOffset?: number, length?: number): Float32Array;
-
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * Returns a new array from a set of elements.
-      * @param items A set of elements to include in the new array object.
-      */
-    of(...items: number[]): Float32Array;
-
-    /**
-      * Creates an array from an array-like or iterable object.
-      * @param arrayLike An array-like or iterable object to convert to an array.
-      * @param mapfn A mapping function to call on every element of the array.
-      * @param thisArg Value of 'this' used to invoke the mapfn.
-      */
-    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Float32Array;
-
-}
-declare const Float32Array: Float32ArrayConstructor;
-
-/**
-  * A typed array of 64-bit float values. The contents are initialized to 0. If the requested
-  * number of bytes could not be allocated an exception is raised.
-  */
-interface Float64Array {
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * The ArrayBuffer instance referenced by the array.
-      */
-    readonly buffer: ArrayBuffer;
-
-    /**
-      * The length in bytes of the array.
-      */
-    readonly byteLength: number;
-
-    /**
-      * The offset in bytes of the array.
-      */
-    readonly byteOffset: number;
-
-    /**
-      * Returns the this object after copying a section of the array identified by start and end
-      * to the same array starting at position target
-      * @param target If target is negative, it is treated as length+target where length is the
-      * length of the array.
-      * @param start If start is negative, it is treated as length+start. If end is negative, it
-      * is treated as length+end.
-      * @param end If not specified, length of the this object is used as its default value.
-      */
-    copyWithin(target: number, start: number, end?: number): this;
-
-    /**
-      * Determines whether all the members of an array satisfy the specified test.
-      * @param callbackfn A function that accepts up to three arguments. The every method calls
-      * the callbackfn function for each element in array1 until the callbackfn returns false,
-      * or until the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    every(callbackfn: (value: number, index: number, array: Float64Array) => boolean, thisArg?: any): boolean;
-
-    /**
-        * Returns the this object after filling the section identified by start and end with value
-        * @param value value to fill array section with
-        * @param start index to start filling the array at. If start is negative, it is treated as
-        * length+start where length is the length of the array.
-        * @param end index to stop filling the array at. If end is negative, it is treated as
-        * length+end.
-        */
-    fill(value: number, start?: number, end?: number): this;
-
-    /**
-      * Returns the elements of an array that meet the condition specified in a callback function.
-      * @param callbackfn A function that accepts up to three arguments. The filter method calls
-      * the callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    filter(callbackfn: (value: number, index: number, array: Float64Array) => any, thisArg?: any): Float64Array;
-
-    /**
-      * Returns the value of the first element in the array where predicate is true, and undefined
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found, find
-      * immediately returns that element value. Otherwise, find returns undefined.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
-
-    /**
-      * Returns the index of the first element in the array where predicate is true, and -1
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found,
-      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
-
-    /**
-      * Performs the specified action for each element in an array.
-      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    forEach(callbackfn: (value: number, index: number, array: Float64Array) => void, thisArg?: any): void;
-
-    /**
-      * Returns the index of the first occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      *  search starts at index 0.
-      */
-    indexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * Adds all the elements of an array separated by the specified separator string.
-      * @param separator A string used to separate one element of an array from the next in the
-      * resulting String. If omitted, the array elements are separated with a comma.
-      */
-    join(separator?: string): string;
-
-    /**
-      * Returns the index of the last occurrence of a value in an array.
-      * @param searchElement The value to locate in the array.
-      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
-      * search starts at index 0.
-      */
-    lastIndexOf(searchElement: number, fromIndex?: number): number;
-
-    /**
-      * The length of the array.
-      */
-    readonly length: number;
-
-    /**
-      * Calls a defined callback function on each element of an array, and returns an array that
-      * contains the results.
-      * @param callbackfn A function that accepts up to three arguments. The map method calls the
-      * callbackfn function one time for each element in the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    map(callbackfn: (value: number, index: number, array: Float64Array) => number, thisArg?: any): Float64Array;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Float64Array) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array. The return value of
-      * the callback function is the accumulated result, and is provided as an argument in the next
-      * call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
-      * callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Float64Array) => U, initialValue: U): U;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an
-      * argument instead of an array value.
-      */
-    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Float64Array) => number, initialValue?: number): number;
-
-    /**
-      * Calls the specified callback function for all the elements in an array, in descending order.
-      * The return value of the callback function is the accumulated result, and is provided as an
-      * argument in the next call to the callback function.
-      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
-      * the callbackfn function one time for each element in the array.
-      * @param initialValue If initialValue is specified, it is used as the initial value to start
-      * the accumulation. The first call to the callbackfn function provides this value as an argument
-      * instead of an array value.
-      */
-    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Float64Array) => U, initialValue: U): U;
-
-    /**
-      * Reverses the elements in an Array.
-      */
-    reverse(): Float64Array;
-
-    /**
-      * Sets a value or an array of values.
-      * @param index The index of the location to set.
-      * @param value The value to set.
-      */
-    set(index: number, value: number): void;
-
-    /**
-      * Sets a value or an array of values.
-      * @param array A typed or untyped array of values to set.
-      * @param offset The index in the current array at which the values are to be written.
-      */
-    set(array: ArrayLike<number>, offset?: number): void;
-
-    /**
-      * Returns a section of an array.
-      * @param start The beginning of the specified portion of the array.
-      * @param end The end of the specified portion of the array.
-      */
-    slice(start?: number, end?: number): Float64Array;
-
-    /**
-      * Determines whether the specified callback function returns true for any element of an array.
-      * @param callbackfn A function that accepts up to three arguments. The some method calls the
-      * callbackfn function for each element in array1 until the callbackfn returns true, or until
-      * the end of the array.
-      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
-      * If thisArg is omitted, undefined is used as the this value.
-      */
-    some(callbackfn: (value: number, index: number, array: Float64Array) => boolean, thisArg?: any): boolean;
-
-    /**
-      * Sorts an array.
-      * @param compareFn The name of the function used to determine the order of the elements. If
-      * omitted, the elements are sorted in ascending, ASCII character order.
-      */
-    sort(compareFn?: (a: number, b: number) => number): this;
-
-    /**
-      * Gets a new Float64Array view of the ArrayBuffer store for this array, referencing the elements
-      * at begin, inclusive, up to end, exclusive.
-      * @param begin The index of the beginning of the array.
-      * @param end The index of the end of the array.
-      */
-    subarray(begin: number, end?: number): Float64Array;
-
-    /**
-      * Converts a number to a string by using the current locale.
-      */
-    toLocaleString(): string;
-
-    /**
-      * Returns a string representation of an array.
-      */
-    toString(): string;
-
-    [index: number]: number;
-}
-
-interface Float64ArrayConstructor {
-    readonly prototype: Float64Array;
-    new (length: number): Float64Array;
-    new (array: ArrayLike<number>): Float64Array;
-    new (buffer: ArrayBuffer, byteOffset?: number, length?: number): Float64Array;
-
-    /**
-      * The size in bytes of each element in the array.
-      */
-    readonly BYTES_PER_ELEMENT: number;
-
-    /**
-      * Returns a new array from a set of elements.
-      * @param items A set of elements to include in the new array object.
-      */
-    of(...items: number[]): Float64Array;
-
-    /**
-      * Creates an array from an array-like or iterable object.
-      * @param arrayLike An array-like or iterable object to convert to an array.
-      * @param mapfn A mapping function to call on every element of the array.
-      * @param thisArg Value of 'this' used to invoke the mapfn.
-      */
-    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Float64Array;
-}
-declare const Float64Array: Float64ArrayConstructor;
-
-/////////////////////////////
-/// ECMAScript Internationalization API
-/////////////////////////////
-
-declare module Intl {
-    interface CollatorOptions {
-        usage?: string;
-        localeMatcher?: string;
-        numeric?: boolean;
-        caseFirst?: string;
-        sensitivity?: string;
-        ignorePunctuation?: boolean;
-    }
-
-    interface ResolvedCollatorOptions {
-        locale: string;
-        usage: string;
-        sensitivity: string;
-        ignorePunctuation: boolean;
-        collation: string;
-        caseFirst: string;
-        numeric: boolean;
-    }
-
-    interface Collator {
-        compare(x: string, y: string): number;
-        resolvedOptions(): ResolvedCollatorOptions;
-    }
-    var Collator: {
-        new (locales?: string | string[], options?: CollatorOptions): Collator;
-        (locales?: string | string[], options?: CollatorOptions): Collator;
-        supportedLocalesOf(locales: string | string[], options?: CollatorOptions): string[];
-    }
-
-    interface NumberFormatOptions {
-        localeMatcher?: string;
-        style?: string;
-        currency?: string;
-        currencyDisplay?: string;
-        useGrouping?: boolean;
-        minimumIntegerDigits?: number;
-        minimumFractionDigits?: number;
-        maximumFractionDigits?: number;
-        minimumSignificantDigits?: number;
-        maximumSignificantDigits?: number;
-    }
-
-    interface ResolvedNumberFormatOptions {
-        locale: string;
-        numberingSystem: string;
-        style: string;
-        currency?: string;
-        currencyDisplay?: string;
-        minimumIntegerDigits: number;
-        minimumFractionDigits: number;
-        maximumFractionDigits: number;
-        minimumSignificantDigits?: number;
-        maximumSignificantDigits?: number;
-        useGrouping: boolean;
-    }
-
-    interface NumberFormat {
-        format(value: number): string;
-        resolvedOptions(): ResolvedNumberFormatOptions;
-    }
-    var NumberFormat: {
-        new (locales?: string | string[], options?: NumberFormatOptions): NumberFormat;
-        (locales?: string | string[], options?: NumberFormatOptions): NumberFormat;
-        supportedLocalesOf(locales: string | string[], options?: NumberFormatOptions): string[];
-    }
-
-    interface DateTimeFormatOptions {
-        localeMatcher?: string;
-        weekday?: string;
-        era?: string;
-        year?: string;
-        month?: string;
-        day?: string;
-        hour?: string;
-        minute?: string;
-        second?: string;
-        timeZoneName?: string;
-        formatMatcher?: string;
-        hour12?: boolean;
-        timeZone?: string;
-    }
-
-    interface ResolvedDateTimeFormatOptions {
-        locale: string;
-        calendar: string;
-        numberingSystem: string;
-        timeZone: string;
-        hour12?: boolean;
-        weekday?: string;
-        era?: string;
-        year?: string;
-        month?: string;
-        day?: string;
-        hour?: string;
-        minute?: string;
-        second?: string;
-        timeZoneName?: string;
-    }
-
-    interface DateTimeFormat {
-        format(date?: Date | number): string;
-        resolvedOptions(): ResolvedDateTimeFormatOptions;
-    }
-    var DateTimeFormat: {
-        new (locales?: string | string[], options?: DateTimeFormatOptions): DateTimeFormat;
-        (locales?: string | string[], options?: DateTimeFormatOptions): DateTimeFormat;
-        supportedLocalesOf(locales: string | string[], options?: DateTimeFormatOptions): string[];
-    }
-}
-
-interface String {
-    /**
-      * Determines whether two strings are equivalent in the current or specified locale.
-      * @param that String to compare to target string
-      * @param locales A locale string or array of locale strings that contain one or more language or locale tags. If you include more than one locale string, list them in descending order of priority so that the first entry is the preferred locale. If you omit this parameter, the default locale of the JavaScript runtime is used. This parameter must conform to BCP 47 standards; see the Intl.Collator object for details.
-      * @param options An object that contains one or more properties that specify comparison options. see the Intl.Collator object for details.
-      */
-    localeCompare(that: string, locales?: string | string[], options?: Intl.CollatorOptions): number;
-}
-
-interface Number {
-    /**
-      * Converts a number to a string by using the current or specified locale.
-      * @param locales A locale string or array of locale strings that contain one or more language or locale tags. If you include more than one locale string, list them in descending order of priority so that the first entry is the preferred locale. If you omit this parameter, the default locale of the JavaScript runtime is used.
-      * @param options An object that contains one or more properties that specify comparison options.
-      */
-    toLocaleString(locales?: string | string[], options?: Intl.NumberFormatOptions): string;
-}
-
-interface Date {
-    /**
-      * Converts a date and time to a string by using the current or specified locale.
-      * @param locales A locale string or array of locale strings that contain one or more language or locale tags. If you include more than one locale string, list them in descending order of priority so that the first entry is the preferred locale. If you omit this parameter, the default locale of the JavaScript runtime is used.
-      * @param options An object that contains one or more properties that specify comparison options.
-      */
-    toLocaleString(locales?: string | string[], options?: Intl.DateTimeFormatOptions): string;
-    /**
-      * Converts a date to a string by using the current or specified locale.
-      * @param locales A locale string or array of locale strings that contain one or more language or locale tags. If you include more than one locale string, list them in descending order of priority so that the first entry is the preferred locale. If you omit this parameter, the default locale of the JavaScript runtime is used.
-      * @param options An object that contains one or more properties that specify comparison options.
-      */
-    toLocaleDateString(locales?: string | string[], options?: Intl.DateTimeFormatOptions): string;
-
-    /**
-      * Converts a time to a string by using the current or specified locale.
-      * @param locales A locale string or array of locale strings that contain one or more language or locale tags. If you include more than one locale string, list them in descending order of priority so that the first entry is the preferred locale. If you omit this parameter, the default locale of the JavaScript runtime is used.
-      * @param options An object that contains one or more properties that specify comparison options.
-      */
-    toLocaleTimeString(locales?: string | string[], options?: Intl.DateTimeFormatOptions): string;
-}
-declare type PropertyKey = string | number | symbol;
-
-interface Array<T> {
-    /**
-      * Returns the value of the first element in the array where predicate is true, and undefined
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found, find
-      * immediately returns that element value. Otherwise, find returns undefined.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    find(predicate: (value: T, index: number, obj: Array<T>) => boolean, thisArg?: any): T | undefined;
-
-    /**
-      * Returns the index of the first element in the array where predicate is true, and -1
-      * otherwise.
-      * @param predicate find calls predicate once for each element of the array, in ascending
-      * order, until it finds one where predicate returns true. If such an element is found,
-      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
-      * @param thisArg If provided, it will be used as the this value for each invocation of
-      * predicate. If it is not provided, undefined is used instead.
-      */
-    findIndex(predicate: (value: T, index: number, obj: Array<T>) => boolean, thisArg?: any): number;
-
-    /**
-      * Returns the this object after filling the section identified by start and end with value
-      * @param value value to fill array section with
-      * @param start index to start filling the array at. If start is negative, it is treated as
-      * length+start where length is the length of the array.
-      * @param end index to stop filling the array at. If end is negative, it is treated as
-      * length+end.
-      */
-    fill(value: T, start?: number, end?: number): this;
-
-    /**
-      * Returns the this object after copying a section of the array identified by start and end
-      * to the same array starting at position target
-      * @param target If target is negative, it is treated as length+target where length is the
-      * length of the array.
-      * @param start If start is negative, it is treated as length+start. If end is negative, it
-      * is treated as length+end.
-      * @param end If not specified, length of the this object is used as its default value.
-      */
-    copyWithin(target: number, start: number, end?: number): this;
-}
-
-interface ArrayConstructor {
-    /**
-      * Creates an array from an array-like object.
-      * @param arrayLike An array-like object to convert to an array.
-      * @param mapfn A mapping function to call on every element of the array.
-      * @param thisArg Value of 'this' used to invoke the mapfn.
-      */
-    from<T, U>(arrayLike: ArrayLike<T>, mapfn: (v: T, k: number) => U, thisArg?: any): Array<U>;
-
-
-    /**
-      * Creates an array from an array-like object.
-      * @param arrayLike An array-like object to convert to an array.
-      */
-    from<T>(arrayLike: ArrayLike<T>): Array<T>;
-
-    /**
-      * Returns a new array from a set of elements.
-      * @param items A set of elements to include in the new array object.
-      */
-    of<T>(...items: T[]): Array<T>;
-}
-
-interface DateConstructor {
-    new (value: Date): Date;
-}
-
-interface Function {
-    /**
-      * Returns the name of the function. Function names are read-only and can not be changed.
-      */
-    readonly name: string;
-}
-
-interface Math {
-    /**
-      * Returns the number of leading zero bits in the 32-bit binary representation of a number.
-      * @param x A numeric expression.
-      */
-    clz32(x: number): number;
-
-    /**
-      * Returns the result of 32-bit multiplication of two numbers.
-      * @param x First number
-      * @param y Second number
-      */
-    imul(x: number, y: number): number;
-
-    /**
-      * Returns the sign of the x, indicating whether x is positive, negative or zero.
-      * @param x The numeric expression to test
-      */
-    sign(x: number): number;
-
-    /**
-      * Returns the base 10 logarithm of a number.
-      * @param x A numeric expression.
-      */
-    log10(x: number): number;
-
-    /**
-      * Returns the base 2 logarithm of a number.
-      * @param x A numeric expression.
-      */
-    log2(x: number): number;
-
-    /**
-      * Returns the natural logarithm of 1 + x.
-      * @param x A numeric expression.
-      */
-    log1p(x: number): number;
-
-    /**
-      * Returns the result of (e^x - 1) of x (e raised to the power of x, where e is the base of
-      * the natural logarithms).
-      * @param x A numeric expression.
-      */
-    expm1(x: number): number;
-
-    /**
-      * Returns the hyperbolic cosine of a number.
-      * @param x A numeric expression that contains an angle measured in radians.
-      */
-    cosh(x: number): number;
-
-    /**
-      * Returns the hyperbolic sine of a number.
-      * @param x A numeric expression that contains an angle measured in radians.
-      */
-    sinh(x: number): number;
-
-    /**
-      * Returns the hyperbolic tangent of a number.
-      * @param x A numeric expression that contains an angle measured in radians.
-      */
-    tanh(x: number): number;
-
-    /**
-      * Returns the inverse hyperbolic cosine of a number.
-      * @param x A numeric expression that contains an angle measured in radians.
-      */
-    acosh(x: number): number;
-
-    /**
-      * Returns the inverse hyperbolic sine of a number.
-      * @param x A numeric expression that contains an angle measured in radians.
-      */
-    asinh(x: number): number;
-
-    /**
-      * Returns the inverse hyperbolic tangent of a number.
-      * @param x A numeric expression that contains an angle measured in radians.
-      */
-    atanh(x: number): number;
-
-    /**
-      * Returns the square root of the sum of squares of its arguments.
-      * @param values Values to compute the square root for.
-      *     If no arguments are passed, the result is +0.
-      *     If there is only one argument, the result is the absolute value.
-      *     If any argument is +Infinity or -Infinity, the result is +Infinity.
-      *     If any argument is NaN, the result is NaN.
-      *     If all arguments are either +0 or −0, the result is +0.
-      */
-    hypot(...values: number[] ): number;
-
-    /**
-      * Returns the integral part of the a numeric expression, x, removing any fractional digits.
-      * If x is already an integer, the result is x.
-      * @param x A numeric expression.
-      */
-    trunc(x: number): number;
-
-    /**
-      * Returns the nearest single precision float representation of a number.
-      * @param x A numeric expression.
-      */
-    fround(x: number): number;
-
-    /**
-      * Returns an implementation-dependent approximation to the cube root of number.
-      * @param x A numeric expression.
-      */
-    cbrt(x: number): number;
-}
-
-interface NumberConstructor {
-    /**
-      * The value of Number.EPSILON is the difference between 1 and the smallest value greater than 1
-      * that is representable as a Number value, which is approximately:
-      * 2.2204460492503130808472633361816 x 10‍−‍16.
-      */
-    readonly EPSILON: number;
-
-    /**
-      * Returns true if passed value is finite.
-      * Unlike the global isFininte, Number.isFinite doesn't forcibly convert the parameter to a
-      * number. Only finite values of the type number, result in true.
-      * @param number A numeric value.
-      */
-    isFinite(number: number): boolean;
-
-    /**
-      * Returns true if the value passed is an integer, false otherwise.
-      * @param number A numeric value.
-      */
-    isInteger(number: number): boolean;
-
-    /**
-      * Returns a Boolean value that indicates whether a value is the reserved value NaN (not a
-      * number). Unlike the global isNaN(), Number.isNaN() doesn't forcefully convert the parameter
-      * to a number. Only values of the type number, that are also NaN, result in true.
-      * @param number A numeric value.
-      */
-    isNaN(number: number): boolean;
-
-    /**
-      * Returns true if the value passed is a safe integer.
-      * @param number A numeric value.
-      */
-    isSafeInteger(number: number): boolean;
-
-    /**
-      * The value of the largest integer n such that n and n + 1 are both exactly representable as
-      * a Number value.
-      * The value of Number.MAX_SAFE_INTEGER is 9007199254740991 2^53 − 1.
-      */
-    readonly MAX_SAFE_INTEGER: number;
-
-    /**
-      * The value of the smallest integer n such that n and n − 1 are both exactly representable as
-      * a Number value.
-      * The value of Number.MIN_SAFE_INTEGER is −9007199254740991 (−(2^53 − 1)).
-      */
-    readonly MIN_SAFE_INTEGER: number;
-
-    /**
-      * Converts a string to a floating-point number.
-      * @param string A string that contains a floating-point number.
-      */
-    parseFloat(string: string): number;
-
-    /**
-      * Converts A string to an integer.
-      * @param s A string to convert into a number.
-      * @param radix A value between 2 and 36 that specifies the base of the number in numString.
-      * If this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.
-      * All other strings are considered decimal.
-      */
-    parseInt(string: string, radix?: number): number;
-}
-
-interface Object {
-    /**
-      * Determines whether an object has a property with the specified name.
-      * @param v A property name.
-      */
-    hasOwnProperty(v: PropertyKey): boolean
-
-    /**
-      * Determines whether a specified property is enumerable.
-      * @param v A property name.
-      */
-    propertyIsEnumerable(v: PropertyKey): boolean;
-}
-
-interface ObjectConstructor {
-    /**
-      * Copy the values of all of the enumerable own properties from one or more source objects to a
-      * target object. Returns the target object.
-      * @param target The target object to copy to.
-      * @param source The source object from which to copy properties.
-      */
-    assign<T, U>(target: T, source: U): T & U;
-
-    /**
-      * Copy the values of all of the enumerable own properties from one or more source objects to a
-      * target object. Returns the target object.
-      * @param target The target object to copy to.
-      * @param source1 The first source object from which to copy properties.
-      * @param source2 The second source object from which to copy properties.
-      */
-    assign<T, U, V>(target: T, source1: U, source2: V): T & U & V;
-
-    /**
-      * Copy the values of all of the enumerable own properties from one or more source objects to a
-      * target object. Returns the target object.
-      * @param target The target object to copy to.
-      * @param source1 The first source object from which to copy properties.
-      * @param source2 The second source object from which to copy properties.
-      * @param source3 The third source object from which to copy properties.
-      */
-    assign<T, U, V, W>(target: T, source1: U, source2: V, source3: W): T & U & V & W;
-
-    /**
-      * Copy the values of all of the enumerable own properties from one or more source objects to a
-      * target object. Returns the target object.
-      * @param target The target object to copy to.
-      * @param sources One or more source objects from which to copy properties
-      */
-    assign(target: any, ...sources: any[]): any;
-
-    /**
-      * Returns an array of all symbol properties found directly on object o.
-      * @param o Object to retrieve the symbols from.
-      */
-    getOwnPropertySymbols(o: any): symbol[];
-
-    /**
-      * Returns true if the values are the same value, false otherwise.
-      * @param value1 The first value.
-      * @param value2 The second value.
-      */
-    is(value1: any, value2: any): boolean;
-
-    /**
-      * Sets the prototype of a specified object o to  object proto or null. Returns the object o.
-      * @param o The object to change its prototype.
-      * @param proto The value of the new prototype or null.
-      */
-    setPrototypeOf(o: any, proto: any): any;
-
-    /**
-      * Gets the own property descriptor of the specified object.
-      * An own property descriptor is one that is defined directly on the object and is not
-      * inherited from the object's prototype.
-      * @param o Object that contains the property.
-      * @param p Name of the property.
-    */
-    getOwnPropertyDescriptor(o: any, propertyKey: PropertyKey): PropertyDescriptor;
-
-    /**
-      * Adds a property to an object, or modifies attributes of an existing property.
-      * @param o Object on which to add or modify the property. This can be a native JavaScript
-      * object (that is, a user-defined object or a built in object) or a DOM object.
-      * @param p The property name.
-      * @param attributes Descriptor for the property. It can be for a data property or an accessor
-      *  property.
-      */
-    defineProperty(o: any, propertyKey: PropertyKey, attributes: PropertyDescriptor): any;
-}
-
-interface ReadonlyArray<T> {
-  /**
-    * Returns the value of the first element in the array where predicate is true, and undefined
-    * otherwise.
-    * @param predicate find calls predicate once for each element of the array, in ascending
-    * order, until it finds one where predicate returns true. If such an element is found, find
-    * immediately returns that element value. Otherwise, find returns undefined.
-    * @param thisArg If provided, it will be used as the this value for each invocation of
-    * predicate. If it is not provided, undefined is used instead.
-    */
-  find(predicate: (value: T, index: number, obj: ReadonlyArray<T>) => boolean, thisArg?: any): T | undefined;
-
-  /**
-    * Returns the index of the first element in the array where predicate is true, and -1
-    * otherwise.
-    * @param predicate find calls predicate once for each element of the array, in ascending
-    * order, until it finds one where predicate returns true. If such an element is found,
-    * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
-    * @param thisArg If provided, it will be used as the this value for each invocation of
-    * predicate. If it is not provided, undefined is used instead.
-    */
-  findIndex(predicate: (value: T, index: number, obj: Array<T>) => boolean, thisArg?: any): number;
-}
-
-interface RegExp {
-    /**
-      * Returns a string indicating the flags of the regular expression in question. This field is read-only.
-      * The characters in this string are sequenced and concatenated in the following order:
-      *
-      *    - "g" for global
-      *    - "i" for ignoreCase
-      *    - "m" for multiline
-      *    - "u" for unicode
-      *    - "y" for sticky
-      *
-      * If no flags are set, the value is the empty string.
-      */
-    readonly flags: string;
-
-    /**
-      * Returns a Boolean value indicating the state of the sticky flag (y) used with a regular
-      * expression. Default is false. Read-only.
-      */
-    readonly sticky: boolean;
-
-    /**
-      * Returns a Boolean value indicating the state of the Unicode flag (u) used with a regular
-      * expression. Default is false. Read-only.
-      */
-    readonly unicode: boolean;
-}
-
-interface RegExpConstructor {
-    new (pattern: RegExp, flags?: string): RegExp;
-    (pattern: RegExp, flags?: string): RegExp;
-}
-
-interface String {
-    /**
-      * Returns a nonnegative integer Number less than 1114112 (0x110000) that is the code point
-      * value of the UTF-16 encoded code point starting at the string element at position pos in
-      * the String resulting from converting this object to a String.
-      * If there is no element at that position, the result is undefined.
-      * If a valid UTF-16 surrogate pair does not begin at pos, the result is the code unit at pos.
-      */
-    codePointAt(pos: number): number | undefined;
-
-    /**
-      * Returns true if searchString appears as a substring of the result of converting this
-      * object to a String, at one or more positions that are
-      * greater than or equal to position; otherwise, returns false.
-      * @param searchString search string
-      * @param position If position is undefined, 0 is assumed, so as to search all of the String.
-      */
-    includes(searchString: string, position?: number): boolean;
-
-    /**
-      * Returns true if the sequence of elements of searchString converted to a String is the
-      * same as the corresponding elements of this object (converted to a String) starting at
-      * endPosition – length(this). Otherwise returns false.
-      */
-    endsWith(searchString: string, endPosition?: number): boolean;
-
-    /**
-      * Returns the String value result of normalizing the string into the normalization form
-      * named by form as specified in Unicode Standard Annex #15, Unicode Normalization Forms.
-      * @param form Applicable values: "NFC", "NFD", "NFKC", or "NFKD", If not specified default
-      * is "NFC"
-      */
-    normalize(form: "NFC" | "NFD" | "NFKC" | "NFKD"): string;
-
-    /**
-      * Returns the String value result of normalizing the string into the normalization form
-      * named by form as specified in Unicode Standard Annex #15, Unicode Normalization Forms.
-      * @param form Applicable values: "NFC", "NFD", "NFKC", or "NFKD", If not specified default
-      * is "NFC"
-      */
-    normalize(form?: string): string;
-
-    /**
-      * Returns a String value that is made from count copies appended together. If count is 0,
-      * T is the empty String is returned.
-      * @param count number of copies to append
-      */
-    repeat(count: number): string;
-
-    /**
-      * Returns true if the sequence of elements of searchString converted to a String is the
-      * same as the corresponding elements of this object (converted to a String) starting at
-      * position. Otherwise returns false.
-      */
-    startsWith(searchString: string, position?: number): boolean;
-
-    /**
-      * Returns an <a> HTML anchor element and sets the name attribute to the text value
-      * @param name
-      */
-    anchor(name: string): string;
-
-    /** Returns a <big> HTML element */
-    big(): string;
-
-    /** Returns a <blink> HTML element */
-    blink(): string;
-
-    /** Returns a <b> HTML element */
-    bold(): string;
-
-    /** Returns a <tt> HTML element */
-    fixed(): string
-
-    /** Returns a <font> HTML element and sets the color attribute value */
-    fontcolor(color: string): string
-
-    /** Returns a <font> HTML element and sets the size attribute value */
-    fontsize(size: number): string;
-
-    /** Returns a <font> HTML element and sets the size attribute value */
-    fontsize(size: string): string;
-
-    /** Returns an <i> HTML element */
-    italics(): string;
-
-    /** Returns an <a> HTML element and sets the href attribute value */
-    link(url: string): string;
-
-    /** Returns a <small> HTML element */
-    small(): string;
-
-    /** Returns a <strike> HTML element */
-    strike(): string;
-
-    /** Returns a <sub> HTML element */
-    sub(): string;
-
-    /** Returns a <sup> HTML element */
-    sup(): string;
-}
-
-interface StringConstructor {
-    /**
-      * Return the String value whose elements are, in order, the elements in the List elements.
-      * If length is 0, the empty string is returned.
-      */
-    fromCodePoint(...codePoints: number[]): string;
-
-    /**
-      * String.raw is intended for use as a tag function of a Tagged Template String. When called
-      * as such the first argument will be a well formed template call site object and the rest
-      * parameter will contain the substitution values.
-      * @param template A well-formed template string call site representation.
-      * @param substitutions A set of substitution values.
-      */
-    raw(template: TemplateStringsArray, ...substitutions: any[]): string;
-}
-interface Map<K, V> {
-    clear(): void;
-    delete(key: K): boolean;
-    forEach(callbackfn: (value: V, key: K, map: Map<K, V>) => void, thisArg?: any): void;
-    get(key: K): V | undefined;
-    has(key: K): boolean;
-    set(key: K, value?: V): this;
-    readonly size: number;
-}
-
-interface MapConstructor {
-    new (): Map<any, any>;
-    new <K, V>(entries?: [K, V][]): Map<K, V>;
-    readonly prototype: Map<any, any>;
-}
-declare var Map: MapConstructor;
-
-interface ReadonlyMap<K, V> {
-    forEach(callbackfn: (value: V, key: K, map: ReadonlyMap<K, V>) => void, thisArg?: any): void;
-    get(key: K): V|undefined;
-    has(key: K): boolean;
-    readonly size: number;
-}
-
-interface WeakMap<K, V> {
-    delete(key: K): boolean;
-    get(key: K): V | undefined;
-    has(key: K): boolean;
-    set(key: K, value?: V): this;
-}
-
-interface WeakMapConstructor {
-    new (): WeakMap<any, any>;
-    new <K, V>(entries?: [K, V][]): WeakMap<K, V>;
-    readonly prototype: WeakMap<any, any>;
-}
-declare var WeakMap: WeakMapConstructor;
-
-interface Set<T> {
-    add(value: T): this;
-    clear(): void;
-    delete(value: T): boolean;
-    forEach(callbackfn: (value: T, value2: T, set: Set<T>) => void, thisArg?: any): void;
-    has(value: T): boolean;
-    readonly size: number;
-}
-
-interface SetConstructor {
-    new (): Set<any>;
-    new <T>(values?: T[]): Set<T>;
-    readonly prototype: Set<any>;
-}
-declare var Set: SetConstructor;
-
-interface ReadonlySet<T> {
-    forEach(callbackfn: (value: T, value2: T, set: ReadonlySet<T>) => void, thisArg?: any): void;
-    has(value: T): boolean;
-    readonly size: number;
-}
-
-interface WeakSet<T> {
-    add(value: T): this;
-    delete(value: T): boolean;
-    has(value: T): boolean;
-}
-
-interface WeakSetConstructor {
-    new (): WeakSet<any>;
-    new <T>(values?: T[]): WeakSet<T>;
-    readonly prototype: WeakSet<any>;
-}
-declare var WeakSet: WeakSetConstructor;
-interface GeneratorFunction extends Function { }
-
-interface GeneratorFunctionConstructor {
-    /**
-      * Creates a new Generator function.
-      * @param args A list of arguments the function accepts.
-      */
-    new (...args: string[]): GeneratorFunction;
-    (...args: string[]): GeneratorFunction;
-    readonly prototype: GeneratorFunction;
-}
-declare var GeneratorFunction: GeneratorFunctionConstructor;
-/// <reference path="lib.es2015.symbol.d.ts" />
-
-interface SymbolConstructor {
-    /** 
-      * A method that returns the default iterator for an object. Called by the semantics of the 
-      * for-of statement.
-      */
-    readonly iterator: symbol;
-}
-
-interface IteratorResult<T> {
-    done: boolean;
-    value: T;
-}
-
-interface Iterator<T> {
-    next(value?: any): IteratorResult<T>;
-    return?(value?: any): IteratorResult<T>;
-    throw?(e?: any): IteratorResult<T>;
-}
-
-interface Iterable<T> {
-    [Symbol.iterator](): Iterator<T>;
-}
-
-interface IterableIterator<T> extends Iterator<T> {
-    [Symbol.iterator](): IterableIterator<T>;
-}
-
-interface Array<T> {
-    /** Iterator */
-    [Symbol.iterator](): IterableIterator<T>;
-
-    /** 
-      * Returns an array of key, value pairs for every entry in the array
-      */
-    entries(): IterableIterator<[number, T]>;
-
-    /** 
-      * Returns an list of keys in the array
-      */
-    keys(): IterableIterator<number>;
-
-    /** 
-      * Returns an list of values in the array
-      */
-    values(): IterableIterator<T>;
-}
-
-interface ArrayConstructor {
-    /**
-      * Creates an array from an iterable object.
-      * @param iterable An iterable object to convert to an array.
-      * @param mapfn A mapping function to call on every element of the array.
-      * @param thisArg Value of 'this' used to invoke the mapfn.
-      */
-    from<T, U>(iterable: Iterable<T>, mapfn: (v: T, k: number) => U, thisArg?: any): Array<U>;
-    
-    /**
-      * Creates an array from an iterable object.
-      * @param iterable An iterable object to convert to an array.
-      */
-    from<T>(iterable: Iterable<T>): Array<T>;
-}
-
-interface ReadonlyArray<T> {
-    /** Iterator */
-    [Symbol.iterator](): IterableIterator<T>;
-
-    /** 
-      * Returns an array of key, value pairs for every entry in the array
-      */
-    entries(): IterableIterator<[number, T]>;
-
-    /** 
-      * Returns an list of keys in the array
-      */
-    keys(): IterableIterator<number>;
-
-    /** 
-      * Returns an list of values in the array
-      */
-    values(): IterableIterator<T>;
-}
-
-interface IArguments {
-    /** Iterator */
-    [Symbol.iterator](): IterableIterator<any>;
-}
-
-interface Map<K, V> {
-    [Symbol.iterator](): IterableIterator<[K,V]>;
-    entries(): IterableIterator<[K, V]>;
-    keys(): IterableIterator<K>;
-    values(): IterableIterator<V>;
-}
-
-interface MapConstructor {
-    new <K, V>(iterable: Iterable<[K, V]>): Map<K, V>;
-}
-
-interface WeakMap<K, V> { }
-
-interface WeakMapConstructor {
-    new <K, V>(iterable: Iterable<[K, V]>): WeakMap<K, V>;
-}
-
-interface Set<T> {
-    [Symbol.iterator](): IterableIterator<T>;
-    entries(): IterableIterator<[T, T]>;
-    keys(): IterableIterator<T>;
-    values(): IterableIterator<T>;
-}
-
-interface SetConstructor {
-    new <T>(iterable: Iterable<T>): Set<T>;
-}
-
-interface WeakSet<T> { }
-
-interface WeakSetConstructor {
-    new <T>(iterable: Iterable<T>): WeakSet<T>;
-}
-
-interface Promise<T> { }
-
-interface PromiseConstructor {
-    /**
-     * Creates a Promise that is resolved with an array of results when all of the provided Promises 
-     * resolve, or rejected when any Promise is rejected.
-     * @param values An array of Promises.
-     * @returns A new Promise.
-     */
-    all<TAll>(values: Iterable<TAll | PromiseLike<TAll>>): Promise<TAll[]>;
-    
-    /**
-     * Creates a Promise that is resolved or rejected when any of the provided Promises are resolved 
-     * or rejected.
-     * @param values An array of Promises.
-     * @returns A new Promise.
-     */
-    race<T>(values: Iterable<T | PromiseLike<T>>): Promise<T>;
-}
-
-declare namespace Reflect {
-    function enumerate(target: any): IterableIterator<any>;
-}
-
-interface String {
-    /** Iterator */
-    [Symbol.iterator](): IterableIterator<string>;
-}
-
-/**
-  * A typed array of 8-bit integer values. The contents are initialized to 0. If the requested 
-  * number of bytes could not be allocated an exception is raised.
-  */
-interface Int8Array {
-    [Symbol.iterator](): IterableIterator<number>;
-    /** 
-      * Returns an array of key, value pairs for every entry in the array
-      */
-    entries(): IterableIterator<[number, number]>;
-    /** 
-      * Returns an list of keys in the array
-      */
-    keys(): IterableIterator<number>;
-    /** 
-      * Returns an list of values in the array
-      */
-    values(): IterableIterator<number>;
-}
-
-interface Int8ArrayConstructor {
-    new (elements: Iterable<number>): Int8Array;
-
-    /**
-      * Creates an array from an array-like or iterable object.
-      * @param arrayLike An array-like or iterable object to convert to an array.
-      * @param mapfn A mapping function to call on every element of the array.
-      * @param thisArg Value of 'this' used to invoke the mapfn.
-      */
-    from(arrayLike: Iterable<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Int8Array;
-}
-
-/**
-  * A typed array of 8-bit unsigned integer values. The contents are initialized to 0. If the 
-  * requested number of bytes could not be allocated an exception is raised.
-  */
-interface Uint8Array {
-    [Symbol.iterator](): IterableIterator<number>;
-    /** 
-      * Returns an array of key, value pairs for every entry in the array
-      */
-    entries(): IterableIterator<[number, number]>;
-    /** 
-      * Returns an list of keys in the array
-      */
-    keys(): IterableIterator<number>;
-    /** 
-      * Returns an list of values in the array
-      */
-    values(): IterableIterator<number>;
-}
-
-interface Uint8ArrayConstructor {
-    new (elements: Iterable<number>): Uint8Array;
-
-    /**
-      * Creates an array from an array-like or iterable object.
-      * @param arrayLike An array-like or iterable object to convert to an array.
-      * @param mapfn A mapping function to call on every element of the array.
-      * @param thisArg Value of 'this' used to invoke the mapfn.
-      */
-    from(arrayLike: Iterable<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Uint8Array;
-}
-
-/**
-  * A typed array of 8-bit unsigned integer (clamped) values. The contents are initialized to 0. 
-  * If the requested number of bytes could not be allocated an exception is raised.
-  */
-interface Uint8ClampedArray {
-    [Symbol.iterator](): IterableIterator<number>;
-    /** 
-      * Returns an array of key, value pairs for every entry in the array
-      */
-    entries(): IterableIterator<[number, number]>;
-
-    /** 
-      * Returns an list of keys in the array
-      */
-    keys(): IterableIterator<number>;
-
-    /** 
-      * Returns an list of values in the array
-      */
-    values(): IterableIterator<number>;
-}
-
-interface Uint8ClampedArrayConstructor {
-    new (elements: Iterable<number>): Uint8ClampedArray;
-
-
-    /**
-      * Creates an array from an array-like or iterable object.
-      * @param arrayLike An array-like or iterable object to convert to an array.
-      * @param mapfn A mapping function to call on every element of the array.
-      * @param thisArg Value of 'this' used to invoke the mapfn.
-      */
-    from(arrayLike: Iterable<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Uint8ClampedArray;
-}
-
-/**
-  * A typed array of 16-bit signed integer values. The contents are initialized to 0. If the 
-  * requested number of bytes could not be allocated an exception is raised.
-  */
-interface Int16Array {
-    [Symbol.iterator](): IterableIterator<number>;
-    /** 
-      * Returns an array of key, value pairs for every entry in the array
-      */
-    entries(): IterableIterator<[number, number]>;
-
-    /** 
-      * Returns an list of keys in the array
-      */
-    keys(): IterableIterator<number>;
-
-    /** 
-      * Returns an list of values in the array
-      */
-    values(): IterableIterator<number>;
-}
-
-interface Int16ArrayConstructor {
-    new (elements: Iterable<number>): Int16Array;
-
-    /**
-      * Creates an array from an array-like or iterable object.
-      * @param arrayLike An array-like or iterable object to convert to an array.
-      * @param mapfn A mapping function to call on every element of the array.
-      * @param thisArg Value of 'this' used to invoke the mapfn.
-      */
-    from(arrayLike: Iterable<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Int16Array;
-}
-
-/**
-  * A typed array of 16-bit unsigned integer values. The contents are initialized to 0. If the 
-  * requested number of bytes could not be allocated an exception is raised.
-  */
-interface Uint16Array {
-    [Symbol.iterator](): IterableIterator<number>;
-    /** 
-      * Returns an array of key, value pairs for every entry in the array
-      */
-    entries(): IterableIterator<[number, number]>;
-    /** 
-      * Returns an list of keys in the array
-      */
-    keys(): IterableIterator<number>;
-    /** 
-      * Returns an list of values in the array
-      */
-    values(): IterableIterator<number>;
-}
-
-interface Uint16ArrayConstructor {
-    new (elements: Iterable<number>): Uint16Array;
-
-    /**
-      * Creates an array from an array-like or iterable object.
-      * @param arrayLike An array-like or iterable object to convert to an array.
-      * @param mapfn A mapping function to call on every element of the array.
-      * @param thisArg Value of 'this' used to invoke the mapfn.
-      */
-    from(arrayLike: Iterable<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Uint16Array;
-}
-
-/**
-  * A typed array of 32-bit signed integer values. The contents are initialized to 0. If the 
-  * requested number of bytes could not be allocated an exception is raised.
-  */
-interface Int32Array {
-    [Symbol.iterator](): IterableIterator<number>;
-    /** 
-      * Returns an array of key, value pairs for every entry in the array
-      */
-    entries(): IterableIterator<[number, number]>;
-    /** 
-      * Returns an list of keys in the array
-      */
-    keys(): IterableIterator<number>;
-    /** 
-      * Returns an list of values in the array
-      */
-    values(): IterableIterator<number>;
-}
-
-interface Int32ArrayConstructor {
-    new (elements: Iterable<number>): Int32Array;
-
-    /**
-      * Creates an array from an array-like or iterable object.
-      * @param arrayLike An array-like or iterable object to convert to an array.
-      * @param mapfn A mapping function to call on every element of the array.
-      * @param thisArg Value of 'this' used to invoke the mapfn.
-      */
-    from(arrayLike: Iterable<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Int32Array;
-}
-
-/**
-  * A typed array of 32-bit unsigned integer values. The contents are initialized to 0. If the 
-  * requested number of bytes could not be allocated an exception is raised.
-  */
-interface Uint32Array {
-    [Symbol.iterator](): IterableIterator<number>;
-    /** 
-      * Returns an array of key, value pairs for every entry in the array
-      */
-    entries(): IterableIterator<[number, number]>;
-    /** 
-      * Returns an list of keys in the array
-      */
-    keys(): IterableIterator<number>;
-    /** 
-      * Returns an list of values in the array
-      */
-    values(): IterableIterator<number>;
-}
-
-interface Uint32ArrayConstructor {
-    new (elements: Iterable<number>): Uint32Array;
-
-    /**
-      * Creates an array from an array-like or iterable object.
-      * @param arrayLike An array-like or iterable object to convert to an array.
-      * @param mapfn A mapping function to call on every element of the array.
-      * @param thisArg Value of 'this' used to invoke the mapfn.
-      */
-    from(arrayLike: Iterable<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Uint32Array;
-}
-
-/**
-  * A typed array of 32-bit float values. The contents are initialized to 0. If the requested number
-  * of bytes could not be allocated an exception is raised.
-  */
-interface Float32Array {
-    [Symbol.iterator](): IterableIterator<number>;
-    /** 
-      * Returns an array of key, value pairs for every entry in the array
-      */
-    entries(): IterableIterator<[number, number]>;
-    /** 
-      * Returns an list of keys in the array
-      */
-    keys(): IterableIterator<number>;
-    /** 
-      * Returns an list of values in the array
-      */
-    values(): IterableIterator<number>;
-}
-
-interface Float32ArrayConstructor {
-    new (elements: Iterable<number>): Float32Array;
-
-    /**
-      * Creates an array from an array-like or iterable object.
-      * @param arrayLike An array-like or iterable object to convert to an array.
-      * @param mapfn A mapping function to call on every element of the array.
-      * @param thisArg Value of 'this' used to invoke the mapfn.
-      */
-    from(arrayLike: Iterable<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Float32Array;
-}
-
-/**
-  * A typed array of 64-bit float values. The contents are initialized to 0. If the requested 
-  * number of bytes could not be allocated an exception is raised.
-  */
-interface Float64Array {
-    [Symbol.iterator](): IterableIterator<number>;
-    /** 
-      * Returns an array of key, value pairs for every entry in the array
-      */
-    entries(): IterableIterator<[number, number]>;
-    /** 
-      * Returns an list of keys in the array
-      */
-    keys(): IterableIterator<number>;
-    /** 
-      * Returns an list of values in the array
-      */
-    values(): IterableIterator<number>;
-}
-
-interface Float64ArrayConstructor {
-    new (elements: Iterable<number>): Float64Array;
-
-    /**
-      * Creates an array from an array-like or iterable object.
-      * @param arrayLike An array-like or iterable object to convert to an array.
-      * @param mapfn A mapping function to call on every element of the array.
-      * @param thisArg Value of 'this' used to invoke the mapfn.
-      */
-    from(arrayLike: Iterable<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Float64Array;
-}/**
- * Represents the completion of an asynchronous operation
- */
-interface Promise<T> {
-    /**
-     * Attaches callbacks for the resolution and/or rejection of the Promise.
-     * @param onfulfilled The callback to execute when the Promise is resolved.
-     * @param onrejected The callback to execute when the Promise is rejected.
-     * @returns A Promise for the completion of which ever callback is executed.
-     */
-    then(onfulfilled?: ((value: T) => T | PromiseLike<T>) | undefined | null, onrejected?: ((reason: any) => T | PromiseLike<T>) | undefined | null): Promise<T>;
-
-    /**
-     * Attaches callbacks for the resolution and/or rejection of the Promise.
-     * @param onfulfilled The callback to execute when the Promise is resolved.
-     * @param onrejected The callback to execute when the Promise is rejected.
-     * @returns A Promise for the completion of which ever callback is executed.
-     */
-    then<TResult>(onfulfilled: ((value: T) => T | PromiseLike<T>) | undefined | null, onrejected: (reason: any) => TResult | PromiseLike<TResult>): Promise<T | TResult>;
-
-    /**
-     * Attaches callbacks for the resolution and/or rejection of the Promise.
-     * @param onfulfilled The callback to execute when the Promise is resolved.
-     * @param onrejected The callback to execute when the Promise is rejected.
-     * @returns A Promise for the completion of which ever callback is executed.
-     */
-    then<TResult>(onfulfilled: (value: T) => TResult | PromiseLike<TResult>, onrejected?: ((reason: any) => TResult | PromiseLike<TResult>) | undefined | null): Promise<TResult>;
-
-    /**
-     * Attaches callbacks for the resolution and/or rejection of the Promise.
-     * @param onfulfilled The callback to execute when the Promise is resolved.
-     * @param onrejected The callback to execute when the Promise is rejected.
-     * @returns A Promise for the completion of which ever callback is executed.
-     */
-    then<TResult1, TResult2>(onfulfilled: (value: T) => TResult1 | PromiseLike<TResult1>, onrejected: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>;
-
-    /**
-     * Attaches a callback for only the rejection of the Promise.
-     * @param onrejected The callback to execute when the Promise is rejected.
-     * @returns A Promise for the completion of the callback.
-     */
-    catch(onrejected?: ((reason: any) => T | PromiseLike<T>) | undefined | null): Promise<T>;
-
-    /**
-     * Attaches a callback for only the rejection of the Promise.
-     * @param onrejected The callback to execute when the Promise is rejected.
-     * @returns A Promise for the completion of the callback.
-     */
-    catch<TResult>(onrejected: (reason: any) => TResult | PromiseLike<TResult>): Promise<T | TResult>;
-}
-
-interface PromiseConstructor {
-    /**
-      * A reference to the prototype.
-      */
-    readonly prototype: Promise<any>;
-
-    /**
-     * Creates a new Promise.
-     * @param executor A callback used to initialize the promise. This callback is passed two arguments:
-     * a resolve callback used resolve the promise with a value or the result of another promise,
-     * and a reject callback used to reject the promise with a provided reason or error.
-     */
-    new <T>(executor: (resolve: (value?: T | PromiseLike<T>) => void, reject: (reason?: any) => void) => void): Promise<T>;
-
-    /**
-     * Creates a Promise that is resolved with an array of results when all of the provided Promises
-     * resolve, or rejected when any Promise is rejected.
-     * @param values An array of Promises.
-     * @returns A new Promise.
-     */
-    all<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike <T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>, T7 | PromiseLike<T7>, T8 | PromiseLike<T8>, T9 | PromiseLike<T9>, T10 | PromiseLike<T10>]): Promise<[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10]>;
-
-    /**
-     * Creates a Promise that is resolved with an array of results when all of the provided Promises
-     * resolve, or rejected when any Promise is rejected.
-     * @param values An array of Promises.
-     * @returns A new Promise.
-     */
-    all<T1, T2, T3, T4, T5, T6, T7, T8, T9>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike <T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>, T7 | PromiseLike<T7>, T8 | PromiseLike<T8>, T9 | PromiseLike<T9>]): Promise<[T1, T2, T3, T4, T5, T6, T7, T8, T9]>;
-
-    /**
-     * Creates a Promise that is resolved with an array of results when all of the provided Promises
-     * resolve, or rejected when any Promise is rejected.
-     * @param values An array of Promises.
-     * @returns A new Promise.
-     */
-    all<T1, T2, T3, T4, T5, T6, T7, T8>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike <T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>, T7 | PromiseLike<T7>, T8 | PromiseLike<T8>]): Promise<[T1, T2, T3, T4, T5, T6, T7, T8]>;
-
-    /**
-     * Creates a Promise that is resolved with an array of results when all of the provided Promises
-     * resolve, or rejected when any Promise is rejected.
-     * @param values An array of Promises.
-     * @returns A new Promise.
-     */
-    all<T1, T2, T3, T4, T5, T6, T7>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike <T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>, T7 | PromiseLike<T7>]): Promise<[T1, T2, T3, T4, T5, T6, T7]>;
-
-    /**
-     * Creates a Promise that is resolved with an array of results when all of the provided Promises
-     * resolve, or rejected when any Promise is rejected.
-     * @param values An array of Promises.
-     * @returns A new Promise.
-     */
-    all<T1, T2, T3, T4, T5, T6>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike <T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>]): Promise<[T1, T2, T3, T4, T5, T6]>;
-
-    /**
-     * Creates a Promise that is resolved with an array of results when all of the provided Promises
-     * resolve, or rejected when any Promise is rejected.
-     * @param values An array of Promises.
-     * @returns A new Promise.
-     */
-    all<T1, T2, T3, T4, T5>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike <T4>, T5 | PromiseLike<T5>]): Promise<[T1, T2, T3, T4, T5]>;
-
-    /**
-     * Creates a Promise that is resolved with an array of results when all of the provided Promises
-     * resolve, or rejected when any Promise is rejected.
-     * @param values An array of Promises.
-     * @returns A new Promise.
-     */
-    all<T1, T2, T3, T4>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike <T4>]): Promise<[T1, T2, T3, T4]>;
-
-    /**
-     * Creates a Promise that is resolved with an array of results when all of the provided Promises
-     * resolve, or rejected when any Promise is rejected.
-     * @param values An array of Promises.
-     * @returns A new Promise.
-     */
-    all<T1, T2, T3>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>]): Promise<[T1, T2, T3]>;
-
-    /**
-     * Creates a Promise that is resolved with an array of results when all of the provided Promises
-     * resolve, or rejected when any Promise is rejected.
-     * @param values An array of Promises.
-     * @returns A new Promise.
-     */
-    all<T1, T2>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>]): Promise<[T1, T2]>;
-
-    /**
-     * Creates a Promise that is resolved with an array of results when all of the provided Promises
-     * resolve, or rejected when any Promise is rejected.
-     * @param values An array of Promises.
-     * @returns A new Promise.
-     */
-    all<T>(values: (T | PromiseLike<T>)[]): Promise<T[]>;
-
-    /**
-     * Creates a Promise that is resolved or rejected when any of the provided Promises are resolved
-     * or rejected.
-     * @param values An array of Promises.
-     * @returns A new Promise.
-     */
-    race<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike<T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>, T7 | PromiseLike<T7>, T8 | PromiseLike<T8>, T9 | PromiseLike<T9>, T10 | PromiseLike<T10>]): Promise<T1 | T2 | T3 | T4 | T5 | T6 | T7 | T8 | T9 | T10>;
-
-    /**
-     * Creates a Promise that is resolved or rejected when any of the provided Promises are resolved
-     * or rejected.
-     * @param values An array of Promises.
-     * @returns A new Promise.
-     */
-    race<T1, T2, T3, T4, T5, T6, T7, T8, T9>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike<T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>, T7 | PromiseLike<T7>, T8 | PromiseLike<T8>, T9 | PromiseLike<T9>]): Promise<T1 | T2 | T3 | T4 | T5 | T6 | T7 | T8 | T9>;
-
-    /**
-     * Creates a Promise that is resolved or rejected when any of the provided Promises are resolved
-     * or rejected.
-     * @param values An array of Promises.
-     * @returns A new Promise.
-     */
-    race<T1, T2, T3, T4, T5, T6, T7, T8>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike<T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>, T7 | PromiseLike<T7>, T8 | PromiseLike<T8>]): Promise<T1 | T2 | T3 | T4 | T5 | T6 | T7 | T8>;
-
-    /**
-     * Creates a Promise that is resolved or rejected when any of the provided Promises are resolved
-     * or rejected.
-     * @param values An array of Promises.
-     * @returns A new Promise.
-     */
-    race<T1, T2, T3, T4, T5, T6, T7>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike<T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>, T7 | PromiseLike<T7>]): Promise<T1 | T2 | T3 | T4 | T5 | T6 | T7>;
-
-    /**
-     * Creates a Promise that is resolved or rejected when any of the provided Promises are resolved
-     * or rejected.
-     * @param values An array of Promises.
-     * @returns A new Promise.
-     */
-    race<T1, T2, T3, T4, T5, T6>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike<T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>]): Promise<T1 | T2 | T3 | T4 | T5 | T6>;
-
-    /**
-     * Creates a Promise that is resolved or rejected when any of the provided Promises are resolved
-     * or rejected.
-     * @param values An array of Promises.
-     * @returns A new Promise.
-     */
-    race<T1, T2, T3, T4, T5>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike<T4>, T5 | PromiseLike<T5>]): Promise<T1 | T2 | T3 | T4 | T5>;
-
-    /**
-     * Creates a Promise that is resolved or rejected when any of the provided Promises are resolved
-     * or rejected.
-     * @param values An array of Promises.
-     * @returns A new Promise.
-     */
-    race<T1, T2, T3, T4>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike<T4>]): Promise<T1 | T2 | T3 | T4>;
-
-    /**
-     * Creates a Promise that is resolved or rejected when any of the provided Promises are resolved
-     * or rejected.
-     * @param values An array of Promises.
-     * @returns A new Promise.
-     */
-    race<T1, T2, T3>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>]): Promise<T1 | T2 | T3>;
-
-    /**
-     * Creates a Promise that is resolved or rejected when any of the provided Promises are resolved
-     * or rejected.
-     * @param values An array of Promises.
-     * @returns A new Promise.
-     */
-    race<T1, T2>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>]): Promise<T1 | T2>;
-
-    /**
-     * Creates a Promise that is resolved or rejected when any of the provided Promises are resolved
-     * or rejected.
-     * @param values An array of Promises.
-     * @returns A new Promise.
-     */
-    race<T>(values: (T | PromiseLike<T>)[]): Promise<T>;
-
-    /**
-     * Creates a new rejected promise for the provided reason.
-     * @param reason The reason the promise was rejected.
-     * @returns A new rejected Promise.
-     */
-    reject(reason: any): Promise<never>;
-
-    /**
-     * Creates a new rejected promise for the provided reason.
-     * @param reason The reason the promise was rejected.
-     * @returns A new rejected Promise.
-     */
-    reject<T>(reason: any): Promise<T>;
-
-    /**
-      * Creates a new resolved promise for the provided value.
-      * @param value A promise.
-      * @returns A promise whose internal state matches the provided promise.
-      */
-    resolve<T>(value: T | PromiseLike<T>): Promise<T>;
-
-    /**
-     * Creates a new resolved promise .
-     * @returns A resolved promise.
-     */
-    resolve(): Promise<void>;
-}
-
-declare var Promise: PromiseConstructor;interface ProxyHandler<T> {
-    getPrototypeOf? (target: T): any;
-    setPrototypeOf? (target: T, v: any): boolean;
-    isExtensible? (target: T): boolean;
-    preventExtensions? (target: T): boolean;
-    getOwnPropertyDescriptor? (target: T, p: PropertyKey): PropertyDescriptor;
-    has? (target: T, p: PropertyKey): boolean;
-    get? (target: T, p: PropertyKey, receiver: any): any;
-    set? (target: T, p: PropertyKey, value: any, receiver: any): boolean;
-    deleteProperty? (target: T, p: PropertyKey): boolean;
-    defineProperty? (target: T, p: PropertyKey, attributes: PropertyDescriptor): boolean;
-    enumerate? (target: T): PropertyKey[];
-    ownKeys? (target: T): PropertyKey[];
-    apply? (target: T, thisArg: any, argArray?: any): any;
-    construct? (target: T, thisArg: any, argArray?: any): any;
-}
-
-interface ProxyConstructor {
-    revocable<T>(target: T, handler: ProxyHandler<T>): { proxy: T; revoke: () => void; };
-    new <T>(target: T, handler: ProxyHandler<T>): T
-}
-declare var Proxy: ProxyConstructor;declare namespace Reflect {
-    function apply(target: Function, thisArgument: any, argumentsList: ArrayLike<any>): any;
-    function construct(target: Function, argumentsList: ArrayLike<any>, newTarget?: any): any;
-    function defineProperty(target: any, propertyKey: PropertyKey, attributes: PropertyDescriptor): boolean;
-    function deleteProperty(target: any, propertyKey: PropertyKey): boolean;
-    function get(target: any, propertyKey: PropertyKey, receiver?: any): any;
-    function getOwnPropertyDescriptor(target: any, propertyKey: PropertyKey): PropertyDescriptor;
-    function getPrototypeOf(target: any): any;
-    function has(target: any, propertyKey: PropertyKey): boolean;
-    function isExtensible(target: any): boolean;
-    function ownKeys(target: any): Array<PropertyKey>;
-    function preventExtensions(target: any): boolean;
-    function set(target: any, propertyKey: PropertyKey, value: any, receiver?: any): boolean;
-    function setPrototypeOf(target: any, proto: any): boolean;
-}interface Symbol {
-    /** Returns a string representation of an object. */
-    toString(): string;
-
-    /** Returns the primitive value of the specified object. */
-    valueOf(): Object;
-}
-
-interface SymbolConstructor {
-    /** 
-      * A reference to the prototype. 
-      */
-    readonly prototype: Symbol;
-
-    /**
-      * Returns a new unique Symbol value.
-      * @param  description Description of the new Symbol object.
-      */
-    (description?: string|number): symbol;
-
-    /**
-      * Returns a Symbol object from the global symbol registry matching the given key if found. 
-      * Otherwise, returns a new symbol with this key.
-      * @param key key to search for.
-      */
-    for(key: string): symbol;
-
-    /**
-      * Returns a key from the global symbol registry matching the given Symbol if found. 
-      * Otherwise, returns a undefined.
-      * @param sym Symbol to find the key for.
-      */
-    keyFor(sym: symbol): string | undefined;
-}
-
-declare var Symbol: SymbolConstructor;/// <reference path="lib.es2015.symbol.d.ts" />
-
-interface SymbolConstructor {
-    /** 
-      * A method that determines if a constructor object recognizes an object as one of the 
-      * constructor’s instances. Called by the semantics of the instanceof operator. 
-      */
-    readonly hasInstance: symbol;
-
-    /** 
-      * A Boolean value that if true indicates that an object should flatten to its array elements
-      * by Array.prototype.concat.
-      */
-    readonly isConcatSpreadable: symbol;
-
-    /**
-      * A regular expression method that matches the regular expression against a string. Called 
-      * by the String.prototype.match method. 
-      */
-    readonly match: symbol;
-
-    /** 
-      * A regular expression method that replaces matched substrings of a string. Called by the 
-      * String.prototype.replace method.
-      */
-    readonly replace: symbol;
-
-    /**
-      * A regular expression method that returns the index within a string that matches the 
-      * regular expression. Called by the String.prototype.search method.
-      */
-    readonly search: symbol;
-
-    /** 
-      * A function valued property that is the constructor function that is used to create 
-      * derived objects.
-      */
-    readonly species: symbol;
-
-    /**
-      * A regular expression method that splits a string at the indices that match the regular 
-      * expression. Called by the String.prototype.split method.
-      */
-    readonly split: symbol;
-
-    /** 
-      * A method that converts an object to a corresponding primitive value.
-      * Called by the ToPrimitive abstract operation.
-      */
-    readonly toPrimitive: symbol;
-
-    /** 
-      * A String value that is used in the creation of the default string description of an object.
-      * Called by the built-in method Object.prototype.toString.
-      */
-    readonly toStringTag: symbol;
-
-    /**
-      * An Object whose own property names are property names that are excluded from the 'with'
-      * environment bindings of the associated objects.
-      */
-    readonly unscopables: symbol;
-}
-
-interface Symbol {
-    readonly [Symbol.toStringTag]: "Symbol";
-}
-
-interface Array<T> {
-    /**
-     * Returns an object whose properties have the value 'true'
-     * when they will be absent when used in a 'with' statement.
-     */
-    [Symbol.unscopables](): {
-        copyWithin: boolean;
-        entries: boolean;
-        fill: boolean;
-        find: boolean;
-        findIndex: boolean;
-        keys: boolean;
-        values: boolean;
-    };
-}
-
-interface Date {
-    /**
-     * Converts a Date object to a string.
-     */
-    [Symbol.toPrimitive](hint: "default"): string;
-    /**
-     * Converts a Date object to a string.
-     */
-    [Symbol.toPrimitive](hint: "string"): string;
-    /**
-     * Converts a Date object to a number.
-     */
-    [Symbol.toPrimitive](hint: "number"): number;
-    /**
-     * Converts a Date object to a string or number.
-     *
-     * @param hint The strings "number", "string", or "default" to specify what primitive to return.
-     *
-     * @throws {TypeError} If 'hint' was given something other than "number", "string", or "default".
-     * @returns A number if 'hint' was "number", a string if 'hint' was "string" or "default".
-     */
-    [Symbol.toPrimitive](hint: string): string | number;
-}
-
-interface Map<K, V> {
-    readonly [Symbol.toStringTag]: "Map";
-}
-
-interface WeakMap<K, V>{
-    readonly [Symbol.toStringTag]: "WeakMap";
-}
-
-interface Set<T> {
-    readonly [Symbol.toStringTag]: "Set";
-}
-
-interface WeakSet<T> {
-    readonly [Symbol.toStringTag]: "WeakSet";
-}
-
-interface JSON {
-    readonly [Symbol.toStringTag]: "JSON";
-}
-
-interface Function {
-    /**
-     * Determines whether the given value inherits from this function if this function was used
-     * as a constructor function.
-     *
-     * A constructor function can control which objects are recognized as its instances by
-     * 'instanceof' by overriding this method.
-     */
-    [Symbol.hasInstance](value: any): boolean;
-}
-
-interface GeneratorFunction extends Function {
-    readonly [Symbol.toStringTag]: "GeneratorFunction";
-}
-
-interface Math {
-    readonly [Symbol.toStringTag]: "Math";
-}
-
-interface Promise<T> {
-    readonly [Symbol.toStringTag]: "Promise";
-}
-
-interface PromiseConstructor {
-    readonly [Symbol.species]: Function;
-}
-
-interface RegExp {
-        /**
-      * Matches a string with this regular expression, and returns an array containing the results of
-      * that search.
-      * @param string A string to search within.
-      */
-    [Symbol.match](string: string): RegExpMatchArray | null;
-
-    /**
-      * Replaces text in a string, using this regular expression.
-      * @param string A String object or string literal whose contents matching against
-      *               this regular expression will be replaced
-      * @param replaceValue A String object or string literal containing the text to replace for every 
-      *                     successful match of this regular expression.
-      */
-    [Symbol.replace](string: string, replaceValue: string): string;
-
-    /**
-      * Replaces text in a string, using this regular expression.
-      * @param string A String object or string literal whose contents matching against
-      *               this regular expression will be replaced
-      * @param replacer A function that returns the replacement text.
-      */
-    [Symbol.replace](string: string, replacer: (substring: string, ...args: any[]) => string): string;
-
-    /**
-      * Finds the position beginning first substring match in a regular expression search
-      * using this regular expression.
-      *
-      * @param string The string to search within.
-      */
-    [Symbol.search](string: string): number;
-
-    /**
-      * Returns an array of substrings that were delimited by strings in the original input that
-      * match against this regular expression.
-      *
-      * If the regular expression contains capturing parentheses, then each time this
-      * regular expression matches, the results (including any undefined results) of the
-      * capturing parentheses are spliced.
-      *
-      * @param string string value to split
-      * @param limit if not undefined, the output array is truncated so that it contains no more
-      * than 'limit' elements.
-      */
-    [Symbol.split](string: string, limit?: number): string[];
-}
-
-interface RegExpConstructor {
-    [Symbol.species](): RegExpConstructor;
-}
-
-interface String {
-    /**
-      * Matches a string an object that supports being matched against, and returns an array containing the results of that search.
-      * @param matcher An object that supports being matched against.
-      */
-    match(matcher: { [Symbol.match](string: string): RegExpMatchArray | null; }): RegExpMatchArray | null;
-
-    /**
-      * Replaces text in a string, using an object that supports replacement within a string.
-      * @param searchValue A object can search for and replace matches within a string.
-      * @param replaceValue A string containing the text to replace for every successful match of searchValue in this string.
-      */
-    replace(searchValue: { [Symbol.replace](string: string, replaceValue: string): string; }, replaceValue: string): string;
-
-    /**
-      * Replaces text in a string, using an object that supports replacement within a string.
-      * @param searchValue A object can search for and replace matches within a string.
-      * @param replacer A function that returns the replacement text.
-      */
-    replace(searchValue: { [Symbol.replace](string: string, replacer: (substring: string, ...args: any[]) => string): string; }, replacer: (substring: string, ...args: any[]) => string): string;
-
-    /**
-      * Finds the first substring match in a regular expression search.
-      * @param searcher An object which supports searching within a string.
-      */
-    search(searcher: { [Symbol.search](string: string): number; }): number;
-
-    /**
-      * Split a string into substrings using the specified separator and return them as an array.
-      * @param splitter An object that can split a string.
-      * @param limit A value used to limit the number of elements returned in the array.
-      */
-    split(splitter: { [Symbol.split](string: string, limit?: number): string[]; }, limit?: number): string[];
-}
-
-/**
-  * Represents a raw buffer of binary data, which is used to store data for the 
-  * different typed arrays. ArrayBuffers cannot be read from or written to directly, 
-  * but can be passed to a typed array or DataView Object to interpret the raw 
-  * buffer as needed. 
-  */
-interface ArrayBuffer {
-    readonly [Symbol.toStringTag]: "ArrayBuffer";
-}
-
-interface DataView {
-    readonly [Symbol.toStringTag]: "DataView";
-}
-
-/**
-  * A typed array of 8-bit integer values. The contents are initialized to 0. If the requested 
-  * number of bytes could not be allocated an exception is raised.
-  */
-interface Int8Array {
-    readonly [Symbol.toStringTag]: "Int8Array";
-}
-
-/**
-  * A typed array of 8-bit unsigned integer values. The contents are initialized to 0. If the 
-  * requested number of bytes could not be allocated an exception is raised.
-  */
-interface Uint8Array {
-    readonly [Symbol.toStringTag]: "UInt8Array";
-}
-
-/**
-  * A typed array of 8-bit unsigned integer (clamped) values. The contents are initialized to 0. 
-  * If the requested number of bytes could not be allocated an exception is raised.
-  */
-interface Uint8ClampedArray {
-    readonly [Symbol.toStringTag]: "Uint8ClampedArray";
-}
-
-/**
-  * A typed array of 16-bit signed integer values. The contents are initialized to 0. If the 
-  * requested number of bytes could not be allocated an exception is raised.
-  */
-interface Int16Array {
-    readonly [Symbol.toStringTag]: "Int16Array";
-}
-
-/**
-  * A typed array of 16-bit unsigned integer values. The contents are initialized to 0. If the 
-  * requested number of bytes could not be allocated an exception is raised.
-  */
-interface Uint16Array {
-    readonly [Symbol.toStringTag]: "Uint16Array";
-}
-
-/**
-  * A typed array of 32-bit signed integer values. The contents are initialized to 0. If the 
-  * requested number of bytes could not be allocated an exception is raised.
-  */
-interface Int32Array {
-    readonly [Symbol.toStringTag]: "Int32Array";
-}
-
-/**
-  * A typed array of 32-bit unsigned integer values. The contents are initialized to 0. If the 
-  * requested number of bytes could not be allocated an exception is raised.
-  */
-interface Uint32Array {
-    readonly [Symbol.toStringTag]: "Uint32Array";
-}
-
-/**
-  * A typed array of 32-bit float values. The contents are initialized to 0. If the requested number
-  * of bytes could not be allocated an exception is raised.
-  */
-interface Float32Array {
-    readonly [Symbol.toStringTag]: "Float32Array";
-}
-
-/**
-  * A typed array of 64-bit float values. The contents are initialized to 0. If the requested 
-  * number of bytes could not be allocated an exception is raised.
-  */
-interface Float64Array {
-    readonly [Symbol.toStringTag]: "Float64Array";
-}
-/////////////////////////////
-/// IE DOM APIs
-/////////////////////////////
-
-interface Algorithm {
-    name: string;
-}
-
-interface AriaRequestEventInit extends EventInit {
-    attributeName?: string;
-    attributeValue?: string;
-}
-
-interface CommandEventInit extends EventInit {
-    commandName?: string;
-    detail?: string;
-}
-
-interface CompositionEventInit extends UIEventInit {
-    data?: string;
-}
-
-interface ConfirmSiteSpecificExceptionsInformation extends ExceptionInformation {
-    arrayOfDomainStrings?: string[];
-}
-
-interface ConstrainBooleanParameters {
-    exact?: boolean;
-    ideal?: boolean;
-}
-
-interface ConstrainDOMStringParameters {
-    exact?: string | string[];
-    ideal?: string | string[];
-}
-
-interface ConstrainDoubleRange extends DoubleRange {
-    exact?: number;
-    ideal?: number;
-}
-
-interface ConstrainLongRange extends LongRange {
-    exact?: number;
-    ideal?: number;
-}
-
-interface ConstrainVideoFacingModeParameters {
-    exact?: string | string[];
-    ideal?: string | string[];
-}
-
-interface CustomEventInit extends EventInit {
-    detail?: any;
-}
-
-interface DeviceAccelerationDict {
-    x?: number;
-    y?: number;
-    z?: number;
-}
-
-interface DeviceLightEventInit extends EventInit {
-    value?: number;
-}
-
-interface DeviceRotationRateDict {
-    alpha?: number;
-    beta?: number;
-    gamma?: number;
-}
-
-interface DoubleRange {
-    max?: number;
-    min?: number;
-}
-
-interface EventInit {
-    bubbles?: boolean;
-    cancelable?: boolean;
-}
-
-interface EventModifierInit extends UIEventInit {
-    ctrlKey?: boolean;
-    shiftKey?: boolean;
-    altKey?: boolean;
-    metaKey?: boolean;
-    modifierAltGraph?: boolean;
-    modifierCapsLock?: boolean;
-    modifierFn?: boolean;
-    modifierFnLock?: boolean;
-    modifierHyper?: boolean;
-    modifierNumLock?: boolean;
-    modifierOS?: boolean;
-    modifierScrollLock?: boolean;
-    modifierSuper?: boolean;
-    modifierSymbol?: boolean;
-    modifierSymbolLock?: boolean;
-}
-
-interface ExceptionInformation {
-    domain?: string;
-}
-
-interface FocusEventInit extends UIEventInit {
-    relatedTarget?: EventTarget;
-}
-
-interface HashChangeEventInit extends EventInit {
-    newURL?: string;
-    oldURL?: string;
-}
-
-interface IDBIndexParameters {
-    multiEntry?: boolean;
-    unique?: boolean;
-}
-
-interface IDBObjectStoreParameters {
-    autoIncrement?: boolean;
-    keyPath?: IDBKeyPath;
-}
-
-interface KeyAlgorithm {
-    name?: string;
-}
-
-interface KeyboardEventInit extends EventModifierInit {
-    code?: string;
-    key?: string;
-    location?: number;
-    repeat?: boolean;
-}
-
-interface LongRange {
-    max?: number;
-    min?: number;
-}
-
-interface MSAccountInfo {
-    rpDisplayName?: string;
-    userDisplayName?: string;
-    accountName?: string;
-    userId?: string;
-    accountImageUri?: string;
-}
-
-interface MSAudioLocalClientEvent extends MSLocalClientEventBase {
-    networkSendQualityEventRatio?: number;
-    networkDelayEventRatio?: number;
-    cpuInsufficientEventRatio?: number;
-    deviceHalfDuplexAECEventRatio?: number;
-    deviceRenderNotFunctioningEventRatio?: number;
-    deviceCaptureNotFunctioningEventRatio?: number;
-    deviceGlitchesEventRatio?: number;
-    deviceLowSNREventRatio?: number;
-    deviceLowSpeechLevelEventRatio?: number;
-    deviceClippingEventRatio?: number;
-    deviceEchoEventRatio?: number;
-    deviceNearEndToEchoRatioEventRatio?: number;
-    deviceRenderZeroVolumeEventRatio?: number;
-    deviceRenderMuteEventRatio?: number;
-    deviceMultipleEndpointsEventCount?: number;
-    deviceHowlingEventCount?: number;
-}
-
-interface MSAudioRecvPayload extends MSPayloadBase {
-    samplingRate?: number;
-    signal?: MSAudioRecvSignal;
-    packetReorderRatio?: number;
-    packetReorderDepthAvg?: number;
-    packetReorderDepthMax?: number;
-    burstLossLength1?: number;
-    burstLossLength2?: number;
-    burstLossLength3?: number;
-    burstLossLength4?: number;
-    burstLossLength5?: number;
-    burstLossLength6?: number;
-    burstLossLength7?: number;
-    burstLossLength8OrHigher?: number;
-    fecRecvDistance1?: number;
-    fecRecvDistance2?: number;
-    fecRecvDistance3?: number;
-    ratioConcealedSamplesAvg?: number;
-    ratioStretchedSamplesAvg?: number;
-    ratioCompressedSamplesAvg?: number;
-}
-
-interface MSAudioRecvSignal {
-    initialSignalLevelRMS?: number;
-    recvSignalLevelCh1?: number;
-    recvNoiseLevelCh1?: number;
-    renderSignalLevel?: number;
-    renderNoiseLevel?: number;
-    renderLoopbackSignalLevel?: number;
-}
-
-interface MSAudioSendPayload extends MSPayloadBase {
-    samplingRate?: number;
-    signal?: MSAudioSendSignal;
-    audioFECUsed?: boolean;
-    sendMutePercent?: number;
-}
-
-interface MSAudioSendSignal {
-    noiseLevel?: number;
-    sendSignalLevelCh1?: number;
-    sendNoiseLevelCh1?: number;
-}
-
-interface MSConnectivity {
-    iceType?: string;
-    iceWarningFlags?: MSIceWarningFlags;
-    relayAddress?: MSRelayAddress;
-}
-
-interface MSCredentialFilter {
-    accept?: MSCredentialSpec[];
-}
-
-interface MSCredentialParameters {
-    type?: string;
-}
-
-interface MSCredentialSpec {
-    type?: string;
-    id?: string;
-}
-
-interface MSDelay {
-    roundTrip?: number;
-    roundTripMax?: number;
-}
-
-interface MSDescription extends RTCStats {
-    connectivity?: MSConnectivity;
-    transport?: string;
-    networkconnectivity?: MSNetworkConnectivityInfo;
-    localAddr?: MSIPAddressInfo;
-    remoteAddr?: MSIPAddressInfo;
-    deviceDevName?: string;
-    reflexiveLocalIPAddr?: MSIPAddressInfo;
-}
-
-interface MSFIDOCredentialParameters extends MSCredentialParameters {
-    algorithm?: string | Algorithm;
-    authenticators?: AAGUID[];
-}
-
-interface MSIPAddressInfo {
-    ipAddr?: string;
-    port?: number;
-    manufacturerMacAddrMask?: string;
-}
-
-interface MSIceWarningFlags {
-    turnTcpTimedOut?: boolean;
-    turnUdpAllocateFailed?: boolean;
-    turnUdpSendFailed?: boolean;
-    turnTcpAllocateFailed?: boolean;
-    turnTcpSendFailed?: boolean;
-    udpLocalConnectivityFailed?: boolean;
-    udpNatConnectivityFailed?: boolean;
-    udpRelayConnectivityFailed?: boolean;
-    tcpNatConnectivityFailed?: boolean;
-    tcpRelayConnectivityFailed?: boolean;
-    connCheckMessageIntegrityFailed?: boolean;
-    allocationMessageIntegrityFailed?: boolean;
-    connCheckOtherError?: boolean;
-    turnAuthUnknownUsernameError?: boolean;
-    noRelayServersConfigured?: boolean;
-    multipleRelayServersAttempted?: boolean;
-    portRangeExhausted?: boolean;
-    alternateServerReceived?: boolean;
-    pseudoTLSFailure?: boolean;
-    turnTurnTcpConnectivityFailed?: boolean;
-    useCandidateChecksFailed?: boolean;
-    fipsAllocationFailure?: boolean;
-}
-
-interface MSJitter {
-    interArrival?: number;
-    interArrivalMax?: number;
-    interArrivalSD?: number;
-}
-
-interface MSLocalClientEventBase extends RTCStats {
-    networkReceiveQualityEventRatio?: number;
-    networkBandwidthLowEventRatio?: number;
-}
-
-interface MSNetwork extends RTCStats {
-    jitter?: MSJitter;
-    delay?: MSDelay;
-    packetLoss?: MSPacketLoss;
-    utilization?: MSUtilization;
-}
-
-interface MSNetworkConnectivityInfo {
-    vpn?: boolean;
-    linkspeed?: number;
-    networkConnectionDetails?: string;
-}
-
-interface MSNetworkInterfaceType {
-    interfaceTypeEthernet?: boolean;
-    interfaceTypeWireless?: boolean;
-    interfaceTypePPP?: boolean;
-    interfaceTypeTunnel?: boolean;
-    interfaceTypeWWAN?: boolean;
-}
-
-interface MSOutboundNetwork extends MSNetwork {
-    appliedBandwidthLimit?: number;
-}
-
-interface MSPacketLoss {
-    lossRate?: number;
-    lossRateMax?: number;
-}
-
-interface MSPayloadBase extends RTCStats {
-    payloadDescription?: string;
-}
-
-interface MSRelayAddress {
-    relayAddress?: string;
-    port?: number;
-}
-
-interface MSSignatureParameters {
-    userPrompt?: string;
-}
-
-interface MSTransportDiagnosticsStats extends RTCStats {
-    baseAddress?: string;
-    localAddress?: string;
-    localSite?: string;
-    networkName?: string;
-    remoteAddress?: string;
-    remoteSite?: string;
-    localMR?: string;
-    remoteMR?: string;
-    iceWarningFlags?: MSIceWarningFlags;
-    portRangeMin?: number;
-    portRangeMax?: number;
-    localMRTCPPort?: number;
-    remoteMRTCPPort?: number;
-    stunVer?: number;
-    numConsentReqSent?: number;
-    numConsentReqReceived?: number;
-    numConsentRespSent?: number;
-    numConsentRespReceived?: number;
-    interfaces?: MSNetworkInterfaceType;
-    baseInterface?: MSNetworkInterfaceType;
-    protocol?: string;
-    localInterface?: MSNetworkInterfaceType;
-    localAddrType?: string;
-    remoteAddrType?: string;
-    iceRole?: string;
-    rtpRtcpMux?: boolean;
-    allocationTimeInMs?: number;
-    msRtcEngineVersion?: string;
-}
-
-interface MSUtilization {
-    packets?: number;
-    bandwidthEstimation?: number;
-    bandwidthEstimationMin?: number;
-    bandwidthEstimationMax?: number;
-    bandwidthEstimationStdDev?: number;
-    bandwidthEstimationAvg?: number;
-}
-
-interface MSVideoPayload extends MSPayloadBase {
-    resoluton?: string;
-    videoBitRateAvg?: number;
-    videoBitRateMax?: number;
-    videoFrameRateAvg?: number;
-    videoPacketLossRate?: number;
-    durationSeconds?: number;
-}
-
-interface MSVideoRecvPayload extends MSVideoPayload {
-    videoFrameLossRate?: number;
-    recvCodecType?: string;
-    recvResolutionWidth?: number;
-    recvResolutionHeight?: number;
-    videoResolutions?: MSVideoResolutionDistribution;
-    recvFrameRateAverage?: number;
-    recvBitRateMaximum?: number;
-    recvBitRateAverage?: number;
-    recvVideoStreamsMax?: number;
-    recvVideoStreamsMin?: number;
-    recvVideoStreamsMode?: number;
-    videoPostFECPLR?: number;
-    lowBitRateCallPercent?: number;
-    lowFrameRateCallPercent?: number;
-    reorderBufferTotalPackets?: number;
-    recvReorderBufferReorderedPackets?: number;
-    recvReorderBufferPacketsDroppedDueToBufferExhaustion?: number;
-    recvReorderBufferMaxSuccessfullyOrderedExtent?: number;
-    recvReorderBufferMaxSuccessfullyOrderedLateTime?: number;
-    recvReorderBufferPacketsDroppedDueToTimeout?: number;
-    recvFpsHarmonicAverage?: number;
-    recvNumResSwitches?: number;
-}
-
-interface MSVideoResolutionDistribution {
-    cifQuality?: number;
-    vgaQuality?: number;
-    h720Quality?: number;
-    h1080Quality?: number;
-    h1440Quality?: number;
-    h2160Quality?: number;
-}
-
-interface MSVideoSendPayload extends MSVideoPayload {
-    sendFrameRateAverage?: number;
-    sendBitRateMaximum?: number;
-    sendBitRateAverage?: number;
-    sendVideoStreamsMax?: number;
-    sendResolutionWidth?: number;
-    sendResolutionHeight?: number;
-}
-
-interface MediaEncryptedEventInit extends EventInit {
-    initDataType?: string;
-    initData?: ArrayBuffer;
-}
-
-interface MediaKeyMessageEventInit extends EventInit {
-    messageType?: string;
-    message?: ArrayBuffer;
-}
-
-interface MediaKeySystemConfiguration {
-    initDataTypes?: string[];
-    audioCapabilities?: MediaKeySystemMediaCapability[];
-    videoCapabilities?: MediaKeySystemMediaCapability[];
-    distinctiveIdentifier?: string;
-    persistentState?: string;
-}
-
-interface MediaKeySystemMediaCapability {
-    contentType?: string;
-    robustness?: string;
-}
-
-interface MediaStreamConstraints {
-    video?: boolean | MediaTrackConstraints;
-    audio?: boolean | MediaTrackConstraints;
-}
-
-interface MediaStreamErrorEventInit extends EventInit {
-    error?: MediaStreamError;
-}
-
-interface MediaStreamTrackEventInit extends EventInit {
-    track?: MediaStreamTrack;
-}
-
-interface MediaTrackCapabilities {
-    width?: number | LongRange;
-    height?: number | LongRange;
-    aspectRatio?: number | DoubleRange;
-    frameRate?: number | DoubleRange;
-    facingMode?: string;
-    volume?: number | DoubleRange;
-    sampleRate?: number | LongRange;
-    sampleSize?: number | LongRange;
-    echoCancellation?: boolean[];
-    deviceId?: string;
-    groupId?: string;
-}
-
-interface MediaTrackConstraintSet {
-    width?: number | ConstrainLongRange;
-    height?: number | ConstrainLongRange;
-    aspectRatio?: number | ConstrainDoubleRange;
-    frameRate?: number | ConstrainDoubleRange;
-    facingMode?: string | string[] | ConstrainDOMStringParameters;
-    volume?: number | ConstrainDoubleRange;
-    sampleRate?: number | ConstrainLongRange;
-    sampleSize?: number | ConstrainLongRange;
-    echoCancelation?: boolean | ConstrainBooleanParameters;
-    deviceId?: string | string[] | ConstrainDOMStringParameters;
-    groupId?: string | string[] | ConstrainDOMStringParameters;
-}
-
-interface MediaTrackConstraints extends MediaTrackConstraintSet {
-    advanced?: MediaTrackConstraintSet[];
-}
-
-interface MediaTrackSettings {
-    width?: number;
-    height?: number;
-    aspectRatio?: number;
-    frameRate?: number;
-    facingMode?: string;
-    volume?: number;
-    sampleRate?: number;
-    sampleSize?: number;
-    echoCancellation?: boolean;
-    deviceId?: string;
-    groupId?: string;
-}
-
-interface MediaTrackSupportedConstraints {
-    width?: boolean;
-    height?: boolean;
-    aspectRatio?: boolean;
-    frameRate?: boolean;
-    facingMode?: boolean;
-    volume?: boolean;
-    sampleRate?: boolean;
-    sampleSize?: boolean;
-    echoCancellation?: boolean;
-    deviceId?: boolean;
-    groupId?: boolean;
-}
-
-interface MouseEventInit extends EventModifierInit {
-    screenX?: number;
-    screenY?: number;
-    clientX?: number;
-    clientY?: number;
-    button?: number;
-    buttons?: number;
-    relatedTarget?: EventTarget;
-}
-
-interface MsZoomToOptions {
-    contentX?: number;
-    contentY?: number;
-    viewportX?: string;
-    viewportY?: string;
-    scaleFactor?: number;
-    animate?: string;
-}
-
-interface MutationObserverInit {
-    childList?: boolean;
-    attributes?: boolean;
-    characterData?: boolean;
-    subtree?: boolean;
-    attributeOldValue?: boolean;
-    characterDataOldValue?: boolean;
-    attributeFilter?: string[];
-}
-
-interface ObjectURLOptions {
-    oneTimeOnly?: boolean;
-}
-
-interface PeriodicWaveConstraints {
-    disableNormalization?: boolean;
-}
-
-interface PointerEventInit extends MouseEventInit {
-    pointerId?: number;
-    width?: number;
-    height?: number;
-    pressure?: number;
-    tiltX?: number;
-    tiltY?: number;
-    pointerType?: string;
-    isPrimary?: boolean;
-}
-
-interface PositionOptions {
-    enableHighAccuracy?: boolean;
-    timeout?: number;
-    maximumAge?: number;
-}
-
-interface RTCDTMFToneChangeEventInit extends EventInit {
-    tone?: string;
-}
-
-interface RTCDtlsFingerprint {
-    algorithm?: string;
-    value?: string;
-}
-
-interface RTCDtlsParameters {
-    role?: string;
-    fingerprints?: RTCDtlsFingerprint[];
-}
-
-interface RTCIceCandidate {
-    foundation?: string;
-    priority?: number;
-    ip?: string;
-    protocol?: string;
-    port?: number;
-    type?: string;
-    tcpType?: string;
-    relatedAddress?: string;
-    relatedPort?: number;
-}
-
-interface RTCIceCandidateAttributes extends RTCStats {
-    ipAddress?: string;
-    portNumber?: number;
-    transport?: string;
-    candidateType?: string;
-    priority?: number;
-    addressSourceUrl?: string;
-}
-
-interface RTCIceCandidateComplete {
-}
-
-interface RTCIceCandidatePair {
-    local?: RTCIceCandidate;
-    remote?: RTCIceCandidate;
-}
-
-interface RTCIceCandidatePairStats extends RTCStats {
-    transportId?: string;
-    localCandidateId?: string;
-    remoteCandidateId?: string;
-    state?: string;
-    priority?: number;
-    nominated?: boolean;
-    writable?: boolean;
-    readable?: boolean;
-    bytesSent?: number;
-    bytesReceived?: number;
-    roundTripTime?: number;
-    availableOutgoingBitrate?: number;
-    availableIncomingBitrate?: number;
-}
-
-interface RTCIceGatherOptions {
-    gatherPolicy?: string;
-    iceservers?: RTCIceServer[];
-}
-
-interface RTCIceParameters {
-    usernameFragment?: string;
-    password?: string;
-}
-
-interface RTCIceServer {
-    urls?: any;
-    username?: string;
-    credential?: string;
-}
-
-interface RTCInboundRTPStreamStats extends RTCRTPStreamStats {
-    packetsReceived?: number;
-    bytesReceived?: number;
-    packetsLost?: number;
-    jitter?: number;
-    fractionLost?: number;
-}
-
-interface RTCMediaStreamTrackStats extends RTCStats {
-    trackIdentifier?: string;
-    remoteSource?: boolean;
-    ssrcIds?: string[];
-    frameWidth?: number;
-    frameHeight?: number;
-    framesPerSecond?: number;
-    framesSent?: number;
-    framesReceived?: number;
-    framesDecoded?: number;
-    framesDropped?: number;
-    framesCorrupted?: number;
-    audioLevel?: number;
-    echoReturnLoss?: number;
-    echoReturnLossEnhancement?: number;
-}
-
-interface RTCOutboundRTPStreamStats extends RTCRTPStreamStats {
-    packetsSent?: number;
-    bytesSent?: number;
-    targetBitrate?: number;
-    roundTripTime?: number;
-}
-
-interface RTCRTPStreamStats extends RTCStats {
-    ssrc?: string;
-    associateStatsId?: string;
-    isRemote?: boolean;
-    mediaTrackId?: string;
-    transportId?: string;
-    codecId?: string;
-    firCount?: number;
-    pliCount?: number;
-    nackCount?: number;
-    sliCount?: number;
-}
-
-interface RTCRtcpFeedback {
-    type?: string;
-    parameter?: string;
-}
-
-interface RTCRtcpParameters {
-    ssrc?: number;
-    cname?: string;
-    reducedSize?: boolean;
-    mux?: boolean;
-}
-
-interface RTCRtpCapabilities {
-    codecs?: RTCRtpCodecCapability[];
-    headerExtensions?: RTCRtpHeaderExtension[];
-    fecMechanisms?: string[];
-}
-
-interface RTCRtpCodecCapability {
-    name?: string;
-    kind?: string;
-    clockRate?: number;
-    preferredPayloadType?: number;
-    maxptime?: number;
-    numChannels?: number;
-    rtcpFeedback?: RTCRtcpFeedback[];
-    parameters?: any;
-    options?: any;
-    maxTemporalLayers?: number;
-    maxSpatialLayers?: number;
-    svcMultiStreamSupport?: boolean;
-}
-
-interface RTCRtpCodecParameters {
-    name?: string;
-    payloadType?: any;
-    clockRate?: number;
-    maxptime?: number;
-    numChannels?: number;
-    rtcpFeedback?: RTCRtcpFeedback[];
-    parameters?: any;
-}
-
-interface RTCRtpContributingSource {
-    timestamp?: number;
-    csrc?: number;
-    audioLevel?: number;
-}
-
-interface RTCRtpEncodingParameters {
-    ssrc?: number;
-    codecPayloadType?: number;
-    fec?: RTCRtpFecParameters;
-    rtx?: RTCRtpRtxParameters;
-    priority?: number;
-    maxBitrate?: number;
-    minQuality?: number;
-    framerateBias?: number;
-    resolutionScale?: number;
-    framerateScale?: number;
-    active?: boolean;
-    encodingId?: string;
-    dependencyEncodingIds?: string[];
-    ssrcRange?: RTCSsrcRange;
-}
-
-interface RTCRtpFecParameters {
-    ssrc?: number;
-    mechanism?: string;
-}
-
-interface RTCRtpHeaderExtension {
-    kind?: string;
-    uri?: string;
-    preferredId?: number;
-    preferredEncrypt?: boolean;
-}
-
-interface RTCRtpHeaderExtensionParameters {
-    uri?: string;
-    id?: number;
-    encrypt?: boolean;
-}
-
-interface RTCRtpParameters {
-    muxId?: string;
-    codecs?: RTCRtpCodecParameters[];
-    headerExtensions?: RTCRtpHeaderExtensionParameters[];
-    encodings?: RTCRtpEncodingParameters[];
-    rtcp?: RTCRtcpParameters;
-}
-
-interface RTCRtpRtxParameters {
-    ssrc?: number;
-}
-
-interface RTCRtpUnhandled {
-    ssrc?: number;
-    payloadType?: number;
-    muxId?: string;
-}
-
-interface RTCSrtpKeyParam {
-    keyMethod?: string;
-    keySalt?: string;
-    lifetime?: string;
-    mkiValue?: number;
-    mkiLength?: number;
-}
-
-interface RTCSrtpSdesParameters {
-    tag?: number;
-    cryptoSuite?: string;
-    keyParams?: RTCSrtpKeyParam[];
-    sessionParams?: string[];
-}
-
-interface RTCSsrcRange {
-    min?: number;
-    max?: number;
-}
-
-interface RTCStats {
-    timestamp?: number;
-    type?: string;
-    id?: string;
-    msType?: string;
-}
-
-interface RTCStatsReport {
-}
-
-interface RTCTransportStats extends RTCStats {
-    bytesSent?: number;
-    bytesReceived?: number;
-    rtcpTransportStatsId?: string;
-    activeConnection?: boolean;
-    selectedCandidatePairId?: string;
-    localCertificateId?: string;
-    remoteCertificateId?: string;
-}
-
-interface StoreExceptionsInformation extends ExceptionInformation {
-    siteName?: string;
-    explanationString?: string;
-    detailURI?: string;
-}
-
-interface StoreSiteSpecificExceptionsInformation extends StoreExceptionsInformation {
-    arrayOfDomainStrings?: string[];
-}
-
-interface UIEventInit extends EventInit {
-    view?: Window;
-    detail?: number;
-}
-
-interface WebGLContextAttributes {
-    failIfMajorPerformanceCaveat?: boolean;
-    alpha?: boolean;
-    depth?: boolean;
-    stencil?: boolean;
-    antialias?: boolean;
-    premultipliedAlpha?: boolean;
-    preserveDrawingBuffer?: boolean;
-}
-
-interface WebGLContextEventInit extends EventInit {
-    statusMessage?: string;
-}
-
-interface WheelEventInit extends MouseEventInit {
-    deltaX?: number;
-    deltaY?: number;
-    deltaZ?: number;
-    deltaMode?: number;
-}
-
-interface EventListener {
-    (evt: Event): void;
-}
-
-interface ANGLE_instanced_arrays {
-    drawArraysInstancedANGLE(mode: number, first: number, count: number, primcount: number): void;
-    drawElementsInstancedANGLE(mode: number, count: number, type: number, offset: number, primcount: number): void;
-    vertexAttribDivisorANGLE(index: number, divisor: number): void;
-    readonly VERTEX_ATTRIB_ARRAY_DIVISOR_ANGLE: number;
-}
-
-declare var ANGLE_instanced_arrays: {
-    prototype: ANGLE_instanced_arrays;
-    new(): ANGLE_instanced_arrays;
-    readonly VERTEX_ATTRIB_ARRAY_DIVISOR_ANGLE: number;
-}
-
-interface AnalyserNode extends AudioNode {
-    fftSize: number;
-    readonly frequencyBinCount: number;
-    maxDecibels: number;
-    minDecibels: number;
-    smoothingTimeConstant: number;
-    getByteFrequencyData(array: Uint8Array): void;
-    getByteTimeDomainData(array: Uint8Array): void;
-    getFloatFrequencyData(array: Float32Array): void;
-    getFloatTimeDomainData(array: Float32Array): void;
-}
-
-declare var AnalyserNode: {
-    prototype: AnalyserNode;
-    new(): AnalyserNode;
-}
-
-interface AnimationEvent extends Event {
-    readonly animationName: string;
-    readonly elapsedTime: number;
-    initAnimationEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, animationNameArg: string, elapsedTimeArg: number): void;
-}
-
-declare var AnimationEvent: {
-    prototype: AnimationEvent;
-    new(): AnimationEvent;
-}
-
-interface ApplicationCache extends EventTarget {
-    oncached: (this: this, ev: Event) => any;
-    onchecking: (this: this, ev: Event) => any;
-    ondownloading: (this: this, ev: Event) => any;
-    onerror: (this: this, ev: ErrorEvent) => any;
-    onnoupdate: (this: this, ev: Event) => any;
-    onobsolete: (this: this, ev: Event) => any;
-    onprogress: (this: this, ev: ProgressEvent) => any;
-    onupdateready: (this: this, ev: Event) => any;
-    readonly status: number;
-    abort(): void;
-    swapCache(): void;
-    update(): void;
-    readonly CHECKING: number;
-    readonly DOWNLOADING: number;
-    readonly IDLE: number;
-    readonly OBSOLETE: number;
-    readonly UNCACHED: number;
-    readonly UPDATEREADY: number;
-    addEventListener(type: "cached", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "checking", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "downloading", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "noupdate", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "obsolete", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "progress", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "updateready", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var ApplicationCache: {
-    prototype: ApplicationCache;
-    new(): ApplicationCache;
-    readonly CHECKING: number;
-    readonly DOWNLOADING: number;
-    readonly IDLE: number;
-    readonly OBSOLETE: number;
-    readonly UNCACHED: number;
-    readonly UPDATEREADY: number;
-}
-
-interface AriaRequestEvent extends Event {
-    readonly attributeName: string;
-    attributeValue: string | null;
-}
-
-declare var AriaRequestEvent: {
-    prototype: AriaRequestEvent;
-    new(type: string, eventInitDict?: AriaRequestEventInit): AriaRequestEvent;
-}
-
-interface Attr extends Node {
-    readonly name: string;
-    readonly ownerElement: Element;
-    readonly prefix: string | null;
-    readonly specified: boolean;
-    value: string;
-}
-
-declare var Attr: {
-    prototype: Attr;
-    new(): Attr;
-}
-
-interface AudioBuffer {
-    readonly duration: number;
-    readonly length: number;
-    readonly numberOfChannels: number;
-    readonly sampleRate: number;
-    copyFromChannel(destination: Float32Array, channelNumber: number, startInChannel?: number): void;
-    copyToChannel(source: Float32Array, channelNumber: number, startInChannel?: number): void;
-    getChannelData(channel: number): Float32Array;
-}
-
-declare var AudioBuffer: {
-    prototype: AudioBuffer;
-    new(): AudioBuffer;
-}
-
-interface AudioBufferSourceNode extends AudioNode {
-    buffer: AudioBuffer | null;
-    readonly detune: AudioParam;
-    loop: boolean;
-    loopEnd: number;
-    loopStart: number;
-    onended: (this: this, ev: MediaStreamErrorEvent) => any;
-    readonly playbackRate: AudioParam;
-    start(when?: number, offset?: number, duration?: number): void;
-    stop(when?: number): void;
-    addEventListener(type: "ended", listener: (this: this, ev: MediaStreamErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var AudioBufferSourceNode: {
-    prototype: AudioBufferSourceNode;
-    new(): AudioBufferSourceNode;
-}
-
-interface AudioContext extends EventTarget {
-    readonly currentTime: number;
-    readonly destination: AudioDestinationNode;
-    readonly listener: AudioListener;
-    readonly sampleRate: number;
-    state: string;
-    createAnalyser(): AnalyserNode;
-    createBiquadFilter(): BiquadFilterNode;
-    createBuffer(numberOfChannels: number, length: number, sampleRate: number): AudioBuffer;
-    createBufferSource(): AudioBufferSourceNode;
-    createChannelMerger(numberOfInputs?: number): ChannelMergerNode;
-    createChannelSplitter(numberOfOutputs?: number): ChannelSplitterNode;
-    createConvolver(): ConvolverNode;
-    createDelay(maxDelayTime?: number): DelayNode;
-    createDynamicsCompressor(): DynamicsCompressorNode;
-    createGain(): GainNode;
-    createMediaElementSource(mediaElement: HTMLMediaElement): MediaElementAudioSourceNode;
-    createMediaStreamSource(mediaStream: MediaStream): MediaStreamAudioSourceNode;
-    createOscillator(): OscillatorNode;
-    createPanner(): PannerNode;
-    createPeriodicWave(real: Float32Array, imag: Float32Array, constraints?: PeriodicWaveConstraints): PeriodicWave;
-    createScriptProcessor(bufferSize?: number, numberOfInputChannels?: number, numberOfOutputChannels?: number): ScriptProcessorNode;
-    createStereoPanner(): StereoPannerNode;
-    createWaveShaper(): WaveShaperNode;
-    decodeAudioData(audioData: ArrayBuffer, successCallback?: DecodeSuccessCallback, errorCallback?: DecodeErrorCallback): PromiseLike<AudioBuffer>;
-}
-
-declare var AudioContext: {
-    prototype: AudioContext;
-    new(): AudioContext;
-}
-
-interface AudioDestinationNode extends AudioNode {
-    readonly maxChannelCount: number;
-}
-
-declare var AudioDestinationNode: {
-    prototype: AudioDestinationNode;
-    new(): AudioDestinationNode;
-}
-
-interface AudioListener {
-    dopplerFactor: number;
-    speedOfSound: number;
-    setOrientation(x: number, y: number, z: number, xUp: number, yUp: number, zUp: number): void;
-    setPosition(x: number, y: number, z: number): void;
-    setVelocity(x: number, y: number, z: number): void;
-}
-
-declare var AudioListener: {
-    prototype: AudioListener;
-    new(): AudioListener;
-}
-
-interface AudioNode extends EventTarget {
-    channelCount: number;
-    channelCountMode: string;
-    channelInterpretation: string;
-    readonly context: AudioContext;
-    readonly numberOfInputs: number;
-    readonly numberOfOutputs: number;
-    connect(destination: AudioNode, output?: number, input?: number): void;
-    disconnect(output?: number): void;
-    disconnect(destination: AudioNode, output?: number, input?: number): void;
-    disconnect(destination: AudioParam, output?: number): void;
-}
-
-declare var AudioNode: {
-    prototype: AudioNode;
-    new(): AudioNode;
-}
-
-interface AudioParam {
-    readonly defaultValue: number;
-    value: number;
-    cancelScheduledValues(startTime: number): void;
-    exponentialRampToValueAtTime(value: number, endTime: number): void;
-    linearRampToValueAtTime(value: number, endTime: number): void;
-    setTargetAtTime(target: number, startTime: number, timeConstant: number): void;
-    setValueAtTime(value: number, startTime: number): void;
-    setValueCurveAtTime(values: Float32Array, startTime: number, duration: number): void;
-}
-
-declare var AudioParam: {
-    prototype: AudioParam;
-    new(): AudioParam;
-}
-
-interface AudioProcessingEvent extends Event {
-    readonly inputBuffer: AudioBuffer;
-    readonly outputBuffer: AudioBuffer;
-    readonly playbackTime: number;
-}
-
-declare var AudioProcessingEvent: {
-    prototype: AudioProcessingEvent;
-    new(): AudioProcessingEvent;
-}
-
-interface AudioTrack {
-    enabled: boolean;
-    readonly id: string;
-    kind: string;
-    readonly label: string;
-    language: string;
-    readonly sourceBuffer: SourceBuffer;
-}
-
-declare var AudioTrack: {
-    prototype: AudioTrack;
-    new(): AudioTrack;
-}
-
-interface AudioTrackList extends EventTarget {
-    readonly length: number;
-    onaddtrack: (this: this, ev: TrackEvent) => any;
-    onchange: (this: this, ev: Event) => any;
-    onremovetrack: (this: this, ev: TrackEvent) => any;
-    getTrackById(id: string): AudioTrack | null;
-    item(index: number): AudioTrack;
-    addEventListener(type: "addtrack", listener: (this: this, ev: TrackEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "change", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "removetrack", listener: (this: this, ev: TrackEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-    [index: number]: AudioTrack;
-}
-
-declare var AudioTrackList: {
-    prototype: AudioTrackList;
-    new(): AudioTrackList;
-}
-
-interface BarProp {
-    readonly visible: boolean;
-}
-
-declare var BarProp: {
-    prototype: BarProp;
-    new(): BarProp;
-}
-
-interface BeforeUnloadEvent extends Event {
-    returnValue: any;
-}
-
-declare var BeforeUnloadEvent: {
-    prototype: BeforeUnloadEvent;
-    new(): BeforeUnloadEvent;
-}
-
-interface BiquadFilterNode extends AudioNode {
-    readonly Q: AudioParam;
-    readonly detune: AudioParam;
-    readonly frequency: AudioParam;
-    readonly gain: AudioParam;
-    type: string;
-    getFrequencyResponse(frequencyHz: Float32Array, magResponse: Float32Array, phaseResponse: Float32Array): void;
-}
-
-declare var BiquadFilterNode: {
-    prototype: BiquadFilterNode;
-    new(): BiquadFilterNode;
-}
-
-interface Blob {
-    readonly size: number;
-    readonly type: string;
-    msClose(): void;
-    msDetachStream(): any;
-    slice(start?: number, end?: number, contentType?: string): Blob;
-}
-
-declare var Blob: {
-    prototype: Blob;
-    new (blobParts?: any[], options?: BlobPropertyBag): Blob;
-}
-
-interface CDATASection extends Text {
-}
-
-declare var CDATASection: {
-    prototype: CDATASection;
-    new(): CDATASection;
-}
-
-interface CSS {
-    supports(property: string, value?: string): boolean;
-}
-declare var CSS: CSS;
-
-interface CSSConditionRule extends CSSGroupingRule {
-    conditionText: string;
-}
-
-declare var CSSConditionRule: {
-    prototype: CSSConditionRule;
-    new(): CSSConditionRule;
-}
-
-interface CSSFontFaceRule extends CSSRule {
-    readonly style: CSSStyleDeclaration;
-}
-
-declare var CSSFontFaceRule: {
-    prototype: CSSFontFaceRule;
-    new(): CSSFontFaceRule;
-}
-
-interface CSSGroupingRule extends CSSRule {
-    readonly cssRules: CSSRuleList;
-    deleteRule(index: number): void;
-    insertRule(rule: string, index: number): number;
-}
-
-declare var CSSGroupingRule: {
-    prototype: CSSGroupingRule;
-    new(): CSSGroupingRule;
-}
-
-interface CSSImportRule extends CSSRule {
-    readonly href: string;
-    readonly media: MediaList;
-    readonly styleSheet: CSSStyleSheet;
-}
-
-declare var CSSImportRule: {
-    prototype: CSSImportRule;
-    new(): CSSImportRule;
-}
-
-interface CSSKeyframeRule extends CSSRule {
-    keyText: string;
-    readonly style: CSSStyleDeclaration;
-}
-
-declare var CSSKeyframeRule: {
-    prototype: CSSKeyframeRule;
-    new(): CSSKeyframeRule;
-}
-
-interface CSSKeyframesRule extends CSSRule {
-    readonly cssRules: CSSRuleList;
-    name: string;
-    appendRule(rule: string): void;
-    deleteRule(rule: string): void;
-    findRule(rule: string): CSSKeyframeRule;
-}
-
-declare var CSSKeyframesRule: {
-    prototype: CSSKeyframesRule;
-    new(): CSSKeyframesRule;
-}
-
-interface CSSMediaRule extends CSSConditionRule {
-    readonly media: MediaList;
-}
-
-declare var CSSMediaRule: {
-    prototype: CSSMediaRule;
-    new(): CSSMediaRule;
-}
-
-interface CSSNamespaceRule extends CSSRule {
-    readonly namespaceURI: string;
-    readonly prefix: string;
-}
-
-declare var CSSNamespaceRule: {
-    prototype: CSSNamespaceRule;
-    new(): CSSNamespaceRule;
-}
-
-interface CSSPageRule extends CSSRule {
-    readonly pseudoClass: string;
-    readonly selector: string;
-    selectorText: string;
-    readonly style: CSSStyleDeclaration;
-}
-
-declare var CSSPageRule: {
-    prototype: CSSPageRule;
-    new(): CSSPageRule;
-}
-
-interface CSSRule {
-    cssText: string;
-    readonly parentRule: CSSRule;
-    readonly parentStyleSheet: CSSStyleSheet;
-    readonly type: number;
-    readonly CHARSET_RULE: number;
-    readonly FONT_FACE_RULE: number;
-    readonly IMPORT_RULE: number;
-    readonly KEYFRAMES_RULE: number;
-    readonly KEYFRAME_RULE: number;
-    readonly MEDIA_RULE: number;
-    readonly NAMESPACE_RULE: number;
-    readonly PAGE_RULE: number;
-    readonly STYLE_RULE: number;
-    readonly SUPPORTS_RULE: number;
-    readonly UNKNOWN_RULE: number;
-    readonly VIEWPORT_RULE: number;
-}
-
-declare var CSSRule: {
-    prototype: CSSRule;
-    new(): CSSRule;
-    readonly CHARSET_RULE: number;
-    readonly FONT_FACE_RULE: number;
-    readonly IMPORT_RULE: number;
-    readonly KEYFRAMES_RULE: number;
-    readonly KEYFRAME_RULE: number;
-    readonly MEDIA_RULE: number;
-    readonly NAMESPACE_RULE: number;
-    readonly PAGE_RULE: number;
-    readonly STYLE_RULE: number;
-    readonly SUPPORTS_RULE: number;
-    readonly UNKNOWN_RULE: number;
-    readonly VIEWPORT_RULE: number;
-}
-
-interface CSSRuleList {
-    readonly length: number;
-    item(index: number): CSSRule;
-    [index: number]: CSSRule;
-}
-
-declare var CSSRuleList: {
-    prototype: CSSRuleList;
-    new(): CSSRuleList;
-}
-
-interface CSSStyleDeclaration {
-    alignContent: string | null;
-    alignItems: string | null;
-    alignSelf: string | null;
-    alignmentBaseline: string | null;
-    animation: string | null;
-    animationDelay: string | null;
-    animationDirection: string | null;
-    animationDuration: string | null;
-    animationFillMode: string | null;
-    animationIterationCount: string | null;
-    animationName: string | null;
-    animationPlayState: string | null;
-    animationTimingFunction: string | null;
-    backfaceVisibility: string | null;
-    background: string | null;
-    backgroundAttachment: string | null;
-    backgroundClip: string | null;
-    backgroundColor: string | null;
-    backgroundImage: string | null;
-    backgroundOrigin: string | null;
-    backgroundPosition: string | null;
-    backgroundPositionX: string | null;
-    backgroundPositionY: string | null;
-    backgroundRepeat: string | null;
-    backgroundSize: string | null;
-    baselineShift: string | null;
-    border: string | null;
-    borderBottom: string | null;
-    borderBottomColor: string | null;
-    borderBottomLeftRadius: string | null;
-    borderBottomRightRadius: string | null;
-    borderBottomStyle: string | null;
-    borderBottomWidth: string | null;
-    borderCollapse: string | null;
-    borderColor: string | null;
-    borderImage: string | null;
-    borderImageOutset: string | null;
-    borderImageRepeat: string | null;
-    borderImageSlice: string | null;
-    borderImageSource: string | null;
-    borderImageWidth: string | null;
-    borderLeft: string | null;
-    borderLeftColor: string | null;
-    borderLeftStyle: string | null;
-    borderLeftWidth: string | null;
-    borderRadius: string | null;
-    borderRight: string | null;
-    borderRightColor: string | null;
-    borderRightStyle: string | null;
-    borderRightWidth: string | null;
-    borderSpacing: string | null;
-    borderStyle: string | null;
-    borderTop: string | null;
-    borderTopColor: string | null;
-    borderTopLeftRadius: string | null;
-    borderTopRightRadius: string | null;
-    borderTopStyle: string | null;
-    borderTopWidth: string | null;
-    borderWidth: string | null;
-    bottom: string | null;
-    boxShadow: string | null;
-    boxSizing: string | null;
-    breakAfter: string | null;
-    breakBefore: string | null;
-    breakInside: string | null;
-    captionSide: string | null;
-    clear: string | null;
-    clip: string | null;
-    clipPath: string | null;
-    clipRule: string | null;
-    color: string | null;
-    colorInterpolationFilters: string | null;
-    columnCount: any;
-    columnFill: string | null;
-    columnGap: any;
-    columnRule: string | null;
-    columnRuleColor: any;
-    columnRuleStyle: string | null;
-    columnRuleWidth: any;
-    columnSpan: string | null;
-    columnWidth: any;
-    columns: string | null;
-    content: string | null;
-    counterIncrement: string | null;
-    counterReset: string | null;
-    cssFloat: string | null;
-    cssText: string;
-    cursor: string | null;
-    direction: string | null;
-    display: string | null;
-    dominantBaseline: string | null;
-    emptyCells: string | null;
-    enableBackground: string | null;
-    fill: string | null;
-    fillOpacity: string | null;
-    fillRule: string | null;
-    filter: string | null;
-    flex: string | null;
-    flexBasis: string | null;
-    flexDirection: string | null;
-    flexFlow: string | null;
-    flexGrow: string | null;
-    flexShrink: string | null;
-    flexWrap: string | null;
-    floodColor: string | null;
-    floodOpacity: string | null;
-    font: string | null;
-    fontFamily: string | null;
-    fontFeatureSettings: string | null;
-    fontSize: string | null;
-    fontSizeAdjust: string | null;
-    fontStretch: string | null;
-    fontStyle: string | null;
-    fontVariant: string | null;
-    fontWeight: string | null;
-    glyphOrientationHorizontal: string | null;
-    glyphOrientationVertical: string | null;
-    height: string | null;
-    imeMode: string | null;
-    justifyContent: string | null;
-    kerning: string | null;
-    left: string | null;
-    readonly length: number;
-    letterSpacing: string | null;
-    lightingColor: string | null;
-    lineHeight: string | null;
-    listStyle: string | null;
-    listStyleImage: string | null;
-    listStylePosition: string | null;
-    listStyleType: string | null;
-    margin: string | null;
-    marginBottom: string | null;
-    marginLeft: string | null;
-    marginRight: string | null;
-    marginTop: string | null;
-    marker: string | null;
-    markerEnd: string | null;
-    markerMid: string | null;
-    markerStart: string | null;
-    mask: string | null;
-    maxHeight: string | null;
-    maxWidth: string | null;
-    minHeight: string | null;
-    minWidth: string | null;
-    msContentZoomChaining: string | null;
-    msContentZoomLimit: string | null;
-    msContentZoomLimitMax: any;
-    msContentZoomLimitMin: any;
-    msContentZoomSnap: string | null;
-    msContentZoomSnapPoints: string | null;
-    msContentZoomSnapType: string | null;
-    msContentZooming: string | null;
-    msFlowFrom: string | null;
-    msFlowInto: string | null;
-    msFontFeatureSettings: string | null;
-    msGridColumn: any;
-    msGridColumnAlign: string | null;
-    msGridColumnSpan: any;
-    msGridColumns: string | null;
-    msGridRow: any;
-    msGridRowAlign: string | null;
-    msGridRowSpan: any;
-    msGridRows: string | null;
-    msHighContrastAdjust: string | null;
-    msHyphenateLimitChars: string | null;
-    msHyphenateLimitLines: any;
-    msHyphenateLimitZone: any;
-    msHyphens: string | null;
-    msImeAlign: string | null;
-    msOverflowStyle: string | null;
-    msScrollChaining: string | null;
-    msScrollLimit: string | null;
-    msScrollLimitXMax: any;
-    msScrollLimitXMin: any;
-    msScrollLimitYMax: any;
-    msScrollLimitYMin: any;
-    msScrollRails: string | null;
-    msScrollSnapPointsX: string | null;
-    msScrollSnapPointsY: string | null;
-    msScrollSnapType: string | null;
-    msScrollSnapX: string | null;
-    msScrollSnapY: string | null;
-    msScrollTranslation: string | null;
-    msTextCombineHorizontal: string | null;
-    msTextSizeAdjust: any;
-    msTouchAction: string | null;
-    msTouchSelect: string | null;
-    msUserSelect: string | null;
-    msWrapFlow: string;
-    msWrapMargin: any;
-    msWrapThrough: string;
-    opacity: string | null;
-    order: string | null;
-    orphans: string | null;
-    outline: string | null;
-    outlineColor: string | null;
-    outlineStyle: string | null;
-    outlineWidth: string | null;
-    overflow: string | null;
-    overflowX: string | null;
-    overflowY: string | null;
-    padding: string | null;
-    paddingBottom: string | null;
-    paddingLeft: string | null;
-    paddingRight: string | null;
-    paddingTop: string | null;
-    pageBreakAfter: string | null;
-    pageBreakBefore: string | null;
-    pageBreakInside: string | null;
-    readonly parentRule: CSSRule;
-    perspective: string | null;
-    perspectiveOrigin: string | null;
-    pointerEvents: string | null;
-    position: string | null;
-    quotes: string | null;
-    right: string | null;
-    rubyAlign: string | null;
-    rubyOverhang: string | null;
-    rubyPosition: string | null;
-    stopColor: string | null;
-    stopOpacity: string | null;
-    stroke: string | null;
-    strokeDasharray: string | null;
-    strokeDashoffset: string | null;
-    strokeLinecap: string | null;
-    strokeLinejoin: string | null;
-    strokeMiterlimit: string | null;
-    strokeOpacity: string | null;
-    strokeWidth: string | null;
-    tableLayout: string | null;
-    textAlign: string | null;
-    textAlignLast: string | null;
-    textAnchor: string | null;
-    textDecoration: string | null;
-    textIndent: string | null;
-    textJustify: string | null;
-    textKashida: string | null;
-    textKashidaSpace: string | null;
-    textOverflow: string | null;
-    textShadow: string | null;
-    textTransform: string | null;
-    textUnderlinePosition: string | null;
-    top: string | null;
-    touchAction: string | null;
-    transform: string | null;
-    transformOrigin: string | null;
-    transformStyle: string | null;
-    transition: string | null;
-    transitionDelay: string | null;
-    transitionDuration: string | null;
-    transitionProperty: string | null;
-    transitionTimingFunction: string | null;
-    unicodeBidi: string | null;
-    verticalAlign: string | null;
-    visibility: string | null;
-    webkitAlignContent: string | null;
-    webkitAlignItems: string | null;
-    webkitAlignSelf: string | null;
-    webkitAnimation: string | null;
-    webkitAnimationDelay: string | null;
-    webkitAnimationDirection: string | null;
-    webkitAnimationDuration: string | null;
-    webkitAnimationFillMode: string | null;
-    webkitAnimationIterationCount: string | null;
-    webkitAnimationName: string | null;
-    webkitAnimationPlayState: string | null;
-    webkitAnimationTimingFunction: string | null;
-    webkitAppearance: string | null;
-    webkitBackfaceVisibility: string | null;
-    webkitBackgroundClip: string | null;
-    webkitBackgroundOrigin: string | null;
-    webkitBackgroundSize: string | null;
-    webkitBorderBottomLeftRadius: string | null;
-    webkitBorderBottomRightRadius: string | null;
-    webkitBorderImage: string | null;
-    webkitBorderRadius: string | null;
-    webkitBorderTopLeftRadius: string | null;
-    webkitBorderTopRightRadius: string | null;
-    webkitBoxAlign: string | null;
-    webkitBoxDirection: string | null;
-    webkitBoxFlex: string | null;
-    webkitBoxOrdinalGroup: string | null;
-    webkitBoxOrient: string | null;
-    webkitBoxPack: string | null;
-    webkitBoxSizing: string | null;
-    webkitColumnBreakAfter: string | null;
-    webkitColumnBreakBefore: string | null;
-    webkitColumnBreakInside: string | null;
-    webkitColumnCount: any;
-    webkitColumnGap: any;
-    webkitColumnRule: string | null;
-    webkitColumnRuleColor: any;
-    webkitColumnRuleStyle: string | null;
-    webkitColumnRuleWidth: any;
-    webkitColumnSpan: string | null;
-    webkitColumnWidth: any;
-    webkitColumns: string | null;
-    webkitFilter: string | null;
-    webkitFlex: string | null;
-    webkitFlexBasis: string | null;
-    webkitFlexDirection: string | null;
-    webkitFlexFlow: string | null;
-    webkitFlexGrow: string | null;
-    webkitFlexShrink: string | null;
-    webkitFlexWrap: string | null;
-    webkitJustifyContent: string | null;
-    webkitOrder: string | null;
-    webkitPerspective: string | null;
-    webkitPerspectiveOrigin: string | null;
-    webkitTapHighlightColor: string | null;
-    webkitTextFillColor: string | null;
-    webkitTextSizeAdjust: any;
-    webkitTransform: string | null;
-    webkitTransformOrigin: string | null;
-    webkitTransformStyle: string | null;
-    webkitTransition: string | null;
-    webkitTransitionDelay: string | null;
-    webkitTransitionDuration: string | null;
-    webkitTransitionProperty: string | null;
-    webkitTransitionTimingFunction: string | null;
-    webkitUserModify: string | null;
-    webkitUserSelect: string | null;
-    webkitWritingMode: string | null;
-    whiteSpace: string | null;
-    widows: string | null;
-    width: string | null;
-    wordBreak: string | null;
-    wordSpacing: string | null;
-    wordWrap: string | null;
-    writingMode: string | null;
-    zIndex: string | null;
-    zoom: string | null;
-    getPropertyPriority(propertyName: string): string;
-    getPropertyValue(propertyName: string): string;
-    item(index: number): string;
-    removeProperty(propertyName: string): string;
-    setProperty(propertyName: string, value: string | null, priority?: string): void;
-    [index: number]: string;
-}
-
-declare var CSSStyleDeclaration: {
-    prototype: CSSStyleDeclaration;
-    new(): CSSStyleDeclaration;
-}
-
-interface CSSStyleRule extends CSSRule {
-    readonly readOnly: boolean;
-    selectorText: string;
-    readonly style: CSSStyleDeclaration;
-}
-
-declare var CSSStyleRule: {
-    prototype: CSSStyleRule;
-    new(): CSSStyleRule;
-}
-
-interface CSSStyleSheet extends StyleSheet {
-    readonly cssRules: CSSRuleList;
-    cssText: string;
-    readonly href: string;
-    readonly id: string;
-    readonly imports: StyleSheetList;
-    readonly isAlternate: boolean;
-    readonly isPrefAlternate: boolean;
-    readonly ownerRule: CSSRule;
-    readonly owningElement: Element;
-    readonly pages: StyleSheetPageList;
-    readonly readOnly: boolean;
-    readonly rules: CSSRuleList;
-    addImport(bstrURL: string, lIndex?: number): number;
-    addPageRule(bstrSelector: string, bstrStyle: string, lIndex?: number): number;
-    addRule(bstrSelector: string, bstrStyle?: string, lIndex?: number): number;
-    deleteRule(index?: number): void;
-    insertRule(rule: string, index?: number): number;
-    removeImport(lIndex: number): void;
-    removeRule(lIndex: number): void;
-}
-
-declare var CSSStyleSheet: {
-    prototype: CSSStyleSheet;
-    new(): CSSStyleSheet;
-}
-
-interface CSSSupportsRule extends CSSConditionRule {
-}
-
-declare var CSSSupportsRule: {
-    prototype: CSSSupportsRule;
-    new(): CSSSupportsRule;
-}
-
-interface CanvasGradient {
-    addColorStop(offset: number, color: string): void;
-}
-
-declare var CanvasGradient: {
-    prototype: CanvasGradient;
-    new(): CanvasGradient;
-}
-
-interface CanvasPattern {
-}
-
-declare var CanvasPattern: {
-    prototype: CanvasPattern;
-    new(): CanvasPattern;
-}
-
-interface CanvasRenderingContext2D extends Object, CanvasPathMethods {
-    readonly canvas: HTMLCanvasElement;
-    fillStyle: string | CanvasGradient | CanvasPattern;
-    font: string;
-    globalAlpha: number;
-    globalCompositeOperation: string;
-    lineCap: string;
-    lineDashOffset: number;
-    lineJoin: string;
-    lineWidth: number;
-    miterLimit: number;
-    msFillRule: string;
-    msImageSmoothingEnabled: boolean;
-    shadowBlur: number;
-    shadowColor: string;
-    shadowOffsetX: number;
-    shadowOffsetY: number;
-    strokeStyle: string | CanvasGradient | CanvasPattern;
-    textAlign: string;
-    textBaseline: string;
-    mozImageSmoothingEnabled: boolean;
-    webkitImageSmoothingEnabled: boolean;
-    oImageSmoothingEnabled: boolean;
-    beginPath(): void;
-    clearRect(x: number, y: number, w: number, h: number): void;
-    clip(fillRule?: string): void;
-    createImageData(imageDataOrSw: number | ImageData, sh?: number): ImageData;
-    createLinearGradient(x0: number, y0: number, x1: number, y1: number): CanvasGradient;
-    createPattern(image: HTMLImageElement | HTMLCanvasElement | HTMLVideoElement, repetition: string): CanvasPattern;
-    createRadialGradient(x0: number, y0: number, r0: number, x1: number, y1: number, r1: number): CanvasGradient;
-    drawImage(image: HTMLImageElement | HTMLCanvasElement | HTMLVideoElement, offsetX: number, offsetY: number, width?: number, height?: number, canvasOffsetX?: number, canvasOffsetY?: number, canvasImageWidth?: number, canvasImageHeight?: number): void;
-    fill(fillRule?: string): void;
-    fillRect(x: number, y: number, w: number, h: number): void;
-    fillText(text: string, x: number, y: number, maxWidth?: number): void;
-    getImageData(sx: number, sy: number, sw: number, sh: number): ImageData;
-    getLineDash(): number[];
-    isPointInPath(x: number, y: number, fillRule?: string): boolean;
-    measureText(text: string): TextMetrics;
-    putImageData(imagedata: ImageData, dx: number, dy: number, dirtyX?: number, dirtyY?: number, dirtyWidth?: number, dirtyHeight?: number): void;
-    restore(): void;
-    rotate(angle: number): void;
-    save(): void;
-    scale(x: number, y: number): void;
-    setLineDash(segments: number[]): void;
-    setTransform(m11: number, m12: number, m21: number, m22: number, dx: number, dy: number): void;
-    stroke(): void;
-    strokeRect(x: number, y: number, w: number, h: number): void;
-    strokeText(text: string, x: number, y: number, maxWidth?: number): void;
-    transform(m11: number, m12: number, m21: number, m22: number, dx: number, dy: number): void;
-    translate(x: number, y: number): void;
-}
-
-declare var CanvasRenderingContext2D: {
-    prototype: CanvasRenderingContext2D;
-    new(): CanvasRenderingContext2D;
-}
-
-interface ChannelMergerNode extends AudioNode {
-}
-
-declare var ChannelMergerNode: {
-    prototype: ChannelMergerNode;
-    new(): ChannelMergerNode;
-}
-
-interface ChannelSplitterNode extends AudioNode {
-}
-
-declare var ChannelSplitterNode: {
-    prototype: ChannelSplitterNode;
-    new(): ChannelSplitterNode;
-}
-
-interface CharacterData extends Node, ChildNode {
-    data: string;
-    readonly length: number;
-    appendData(arg: string): void;
-    deleteData(offset: number, count: number): void;
-    insertData(offset: number, arg: string): void;
-    replaceData(offset: number, count: number, arg: string): void;
-    substringData(offset: number, count: number): string;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var CharacterData: {
-    prototype: CharacterData;
-    new(): CharacterData;
-}
-
-interface ClientRect {
-    bottom: number;
-    readonly height: number;
-    left: number;
-    right: number;
-    top: number;
-    readonly width: number;
-}
-
-declare var ClientRect: {
-    prototype: ClientRect;
-    new(): ClientRect;
-}
-
-interface ClientRectList {
-    readonly length: number;
-    item(index: number): ClientRect;
-    [index: number]: ClientRect;
-}
-
-declare var ClientRectList: {
-    prototype: ClientRectList;
-    new(): ClientRectList;
-}
-
-interface ClipboardEvent extends Event {
-    readonly clipboardData: DataTransfer;
-}
-
-declare var ClipboardEvent: {
-    prototype: ClipboardEvent;
-    new(type: string, eventInitDict?: ClipboardEventInit): ClipboardEvent;
-}
-
-interface CloseEvent extends Event {
-    readonly code: number;
-    readonly reason: string;
-    readonly wasClean: boolean;
-    initCloseEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, wasCleanArg: boolean, codeArg: number, reasonArg: string): void;
-}
-
-declare var CloseEvent: {
-    prototype: CloseEvent;
-    new(): CloseEvent;
-}
-
-interface CommandEvent extends Event {
-    readonly commandName: string;
-    readonly detail: string | null;
-}
-
-declare var CommandEvent: {
-    prototype: CommandEvent;
-    new(type: string, eventInitDict?: CommandEventInit): CommandEvent;
-}
-
-interface Comment extends CharacterData {
-    text: string;
-}
-
-declare var Comment: {
-    prototype: Comment;
-    new(): Comment;
-}
-
-interface CompositionEvent extends UIEvent {
-    readonly data: string;
-    readonly locale: string;
-    initCompositionEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, dataArg: string, locale: string): void;
-}
-
-declare var CompositionEvent: {
-    prototype: CompositionEvent;
-    new(typeArg: string, eventInitDict?: CompositionEventInit): CompositionEvent;
-}
-
-interface Console {
-    assert(test?: boolean, message?: string, ...optionalParams: any[]): void;
-    clear(): void;
-    count(countTitle?: string): void;
-    debug(message?: string, ...optionalParams: any[]): void;
-    dir(value?: any, ...optionalParams: any[]): void;
-    dirxml(value: any): void;
-    error(message?: any, ...optionalParams: any[]): void;
-    exception(message?: string, ...optionalParams: any[]): void;
-    group(groupTitle?: string): void;
-    groupCollapsed(groupTitle?: string): void;
-    groupEnd(): void;
-    info(message?: any, ...optionalParams: any[]): void;
-    log(message?: any, ...optionalParams: any[]): void;
-    msIsIndependentlyComposed(element: Element): boolean;
-    profile(reportName?: string): void;
-    profileEnd(): void;
-    select(element: Element): void;
-    table(...data: any[]): void;
-    time(timerName?: string): void;
-    timeEnd(timerName?: string): void;
-    trace(message?: any, ...optionalParams: any[]): void;
-    warn(message?: any, ...optionalParams: any[]): void;
-}
-
-declare var Console: {
-    prototype: Console;
-    new(): Console;
-}
-
-interface ConvolverNode extends AudioNode {
-    buffer: AudioBuffer | null;
-    normalize: boolean;
-}
-
-declare var ConvolverNode: {
-    prototype: ConvolverNode;
-    new(): ConvolverNode;
-}
-
-interface Coordinates {
-    readonly accuracy: number;
-    readonly altitude: number | null;
-    readonly altitudeAccuracy: number | null;
-    readonly heading: number | null;
-    readonly latitude: number;
-    readonly longitude: number;
-    readonly speed: number | null;
-}
-
-declare var Coordinates: {
-    prototype: Coordinates;
-    new(): Coordinates;
-}
-
-interface Crypto extends Object, RandomSource {
-    readonly subtle: SubtleCrypto;
-}
-
-declare var Crypto: {
-    prototype: Crypto;
-    new(): Crypto;
-}
-
-interface CryptoKey {
-    readonly algorithm: KeyAlgorithm;
-    readonly extractable: boolean;
-    readonly type: string;
-    readonly usages: string[];
-}
-
-declare var CryptoKey: {
-    prototype: CryptoKey;
-    new(): CryptoKey;
-}
-
-interface CryptoKeyPair {
-    privateKey: CryptoKey;
-    publicKey: CryptoKey;
-}
-
-declare var CryptoKeyPair: {
-    prototype: CryptoKeyPair;
-    new(): CryptoKeyPair;
-}
-
-interface CustomEvent extends Event {
-    readonly detail: any;
-    initCustomEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, detailArg: any): void;
-}
-
-declare var CustomEvent: {
-    prototype: CustomEvent;
-    new(typeArg: string, eventInitDict?: CustomEventInit): CustomEvent;
-}
-
-interface DOMError {
-    readonly name: string;
-    toString(): string;
-}
-
-declare var DOMError: {
-    prototype: DOMError;
-    new(): DOMError;
-}
-
-interface DOMException {
-    readonly code: number;
-    readonly message: string;
-    readonly name: string;
-    toString(): string;
-    readonly ABORT_ERR: number;
-    readonly DATA_CLONE_ERR: number;
-    readonly DOMSTRING_SIZE_ERR: number;
-    readonly HIERARCHY_REQUEST_ERR: number;
-    readonly INDEX_SIZE_ERR: number;
-    readonly INUSE_ATTRIBUTE_ERR: number;
-    readonly INVALID_ACCESS_ERR: number;
-    readonly INVALID_CHARACTER_ERR: number;
-    readonly INVALID_MODIFICATION_ERR: number;
-    readonly INVALID_NODE_TYPE_ERR: number;
-    readonly INVALID_STATE_ERR: number;
-    readonly NAMESPACE_ERR: number;
-    readonly NETWORK_ERR: number;
-    readonly NOT_FOUND_ERR: number;
-    readonly NOT_SUPPORTED_ERR: number;
-    readonly NO_DATA_ALLOWED_ERR: number;
-    readonly NO_MODIFICATION_ALLOWED_ERR: number;
-    readonly PARSE_ERR: number;
-    readonly QUOTA_EXCEEDED_ERR: number;
-    readonly SECURITY_ERR: number;
-    readonly SERIALIZE_ERR: number;
-    readonly SYNTAX_ERR: number;
-    readonly TIMEOUT_ERR: number;
-    readonly TYPE_MISMATCH_ERR: number;
-    readonly URL_MISMATCH_ERR: number;
-    readonly VALIDATION_ERR: number;
-    readonly WRONG_DOCUMENT_ERR: number;
-}
-
-declare var DOMException: {
-    prototype: DOMException;
-    new(): DOMException;
-    readonly ABORT_ERR: number;
-    readonly DATA_CLONE_ERR: number;
-    readonly DOMSTRING_SIZE_ERR: number;
-    readonly HIERARCHY_REQUEST_ERR: number;
-    readonly INDEX_SIZE_ERR: number;
-    readonly INUSE_ATTRIBUTE_ERR: number;
-    readonly INVALID_ACCESS_ERR: number;
-    readonly INVALID_CHARACTER_ERR: number;
-    readonly INVALID_MODIFICATION_ERR: number;
-    readonly INVALID_NODE_TYPE_ERR: number;
-    readonly INVALID_STATE_ERR: number;
-    readonly NAMESPACE_ERR: number;
-    readonly NETWORK_ERR: number;
-    readonly NOT_FOUND_ERR: number;
-    readonly NOT_SUPPORTED_ERR: number;
-    readonly NO_DATA_ALLOWED_ERR: number;
-    readonly NO_MODIFICATION_ALLOWED_ERR: number;
-    readonly PARSE_ERR: number;
-    readonly QUOTA_EXCEEDED_ERR: number;
-    readonly SECURITY_ERR: number;
-    readonly SERIALIZE_ERR: number;
-    readonly SYNTAX_ERR: number;
-    readonly TIMEOUT_ERR: number;
-    readonly TYPE_MISMATCH_ERR: number;
-    readonly URL_MISMATCH_ERR: number;
-    readonly VALIDATION_ERR: number;
-    readonly WRONG_DOCUMENT_ERR: number;
-}
-
-interface DOMImplementation {
-    createDocument(namespaceURI: string | null, qualifiedName: string | null, doctype: DocumentType): Document;
-    createDocumentType(qualifiedName: string, publicId: string | null, systemId: string | null): DocumentType;
-    createHTMLDocument(title: string): Document;
-    hasFeature(feature: string | null, version: string | null): boolean;
-}
-
-declare var DOMImplementation: {
-    prototype: DOMImplementation;
-    new(): DOMImplementation;
-}
-
-interface DOMParser {
-    parseFromString(source: string, mimeType: string): Document;
-}
-
-declare var DOMParser: {
-    prototype: DOMParser;
-    new(): DOMParser;
-}
-
-interface DOMSettableTokenList extends DOMTokenList {
-    value: string;
-}
-
-declare var DOMSettableTokenList: {
-    prototype: DOMSettableTokenList;
-    new(): DOMSettableTokenList;
-}
-
-interface DOMStringList {
-    readonly length: number;
-    contains(str: string): boolean;
-    item(index: number): string | null;
-    [index: number]: string;
-}
-
-declare var DOMStringList: {
-    prototype: DOMStringList;
-    new(): DOMStringList;
-}
-
-interface DOMStringMap {
-    [name: string]: string;
-}
-
-declare var DOMStringMap: {
-    prototype: DOMStringMap;
-    new(): DOMStringMap;
-}
-
-interface DOMTokenList {
-    readonly length: number;
-    add(...token: string[]): void;
-    contains(token: string): boolean;
-    item(index: number): string;
-    remove(...token: string[]): void;
-    toString(): string;
-    toggle(token: string, force?: boolean): boolean;
-    [index: number]: string;
-}
-
-declare var DOMTokenList: {
-    prototype: DOMTokenList;
-    new(): DOMTokenList;
-}
-
-interface DataCue extends TextTrackCue {
-    data: ArrayBuffer;
-}
-
-declare var DataCue: {
-    prototype: DataCue;
-    new(): DataCue;
-}
-
-interface DataTransfer {
-    dropEffect: string;
-    effectAllowed: string;
-    readonly files: FileList;
-    readonly items: DataTransferItemList;
-    readonly types: DOMStringList;
-    clearData(format?: string): boolean;
-    getData(format: string): string;
-    setData(format: string, data: string): boolean;
-}
-
-declare var DataTransfer: {
-    prototype: DataTransfer;
-    new(): DataTransfer;
-}
-
-interface DataTransferItem {
-    readonly kind: string;
-    readonly type: string;
-    getAsFile(): File | null;
-    getAsString(_callback: FunctionStringCallback | null): void;
-}
-
-declare var DataTransferItem: {
-    prototype: DataTransferItem;
-    new(): DataTransferItem;
-}
-
-interface DataTransferItemList {
-    readonly length: number;
-    add(data: File): DataTransferItem | null;
-    clear(): void;
-    item(index: number): DataTransferItem;
-    remove(index: number): void;
-    [index: number]: DataTransferItem;
-}
-
-declare var DataTransferItemList: {
-    prototype: DataTransferItemList;
-    new(): DataTransferItemList;
-}
-
-interface DeferredPermissionRequest {
-    readonly id: number;
-    readonly type: string;
-    readonly uri: string;
-    allow(): void;
-    deny(): void;
-}
-
-declare var DeferredPermissionRequest: {
-    prototype: DeferredPermissionRequest;
-    new(): DeferredPermissionRequest;
-}
-
-interface DelayNode extends AudioNode {
-    readonly delayTime: AudioParam;
-}
-
-declare var DelayNode: {
-    prototype: DelayNode;
-    new(): DelayNode;
-}
-
-interface DeviceAcceleration {
-    readonly x: number | null;
-    readonly y: number | null;
-    readonly z: number | null;
-}
-
-declare var DeviceAcceleration: {
-    prototype: DeviceAcceleration;
-    new(): DeviceAcceleration;
-}
-
-interface DeviceLightEvent extends Event {
-    readonly value: number;
-}
-
-declare var DeviceLightEvent: {
-    prototype: DeviceLightEvent;
-    new(type: string, eventInitDict?: DeviceLightEventInit): DeviceLightEvent;
-}
-
-interface DeviceMotionEvent extends Event {
-    readonly acceleration: DeviceAcceleration | null;
-    readonly accelerationIncludingGravity: DeviceAcceleration | null;
-    readonly interval: number | null;
-    readonly rotationRate: DeviceRotationRate | null;
-    initDeviceMotionEvent(type: string, bubbles: boolean, cancelable: boolean, acceleration: DeviceAccelerationDict | null, accelerationIncludingGravity: DeviceAccelerationDict | null, rotationRate: DeviceRotationRateDict | null, interval: number | null): void;
-}
-
-declare var DeviceMotionEvent: {
-    prototype: DeviceMotionEvent;
-    new(): DeviceMotionEvent;
-}
-
-interface DeviceOrientationEvent extends Event {
-    readonly absolute: boolean;
-    readonly alpha: number | null;
-    readonly beta: number | null;
-    readonly gamma: number | null;
-    initDeviceOrientationEvent(type: string, bubbles: boolean, cancelable: boolean, alpha: number | null, beta: number | null, gamma: number | null, absolute: boolean): void;
-}
-
-declare var DeviceOrientationEvent: {
-    prototype: DeviceOrientationEvent;
-    new(): DeviceOrientationEvent;
-}
-
-interface DeviceRotationRate {
-    readonly alpha: number | null;
-    readonly beta: number | null;
-    readonly gamma: number | null;
-}
-
-declare var DeviceRotationRate: {
-    prototype: DeviceRotationRate;
-    new(): DeviceRotationRate;
-}
-
-interface Document extends Node, GlobalEventHandlers, NodeSelector, DocumentEvent, ParentNode {
-    /**
-      * Sets or gets the URL for the current document. 
-      */
-    readonly URL: string;
-    /**
-      * Gets the URL for the document, stripped of any character encoding.
-      */
-    readonly URLUnencoded: string;
-    /**
-      * Gets the object that has the focus when the parent document has focus.
-      */
-    readonly activeElement: Element;
-    /**
-      * Sets or gets the color of all active links in the document.
-      */
-    alinkColor: string;
-    /**
-      * Returns a reference to the collection of elements contained by the object.
-      */
-    readonly all: HTMLAllCollection;
-    /**
-      * Retrieves a collection of all a objects that have a name and/or id property. Objects in this collection are in HTML source order.
-      */
-    anchors: HTMLCollectionOf<HTMLAnchorElement>;
-    /**
-      * Retrieves a collection of all applet objects in the document.
-      */
-    applets: HTMLCollectionOf<HTMLAppletElement>;
-    /**
-      * Deprecated. Sets or retrieves a value that indicates the background color behind the object. 
-      */
-    bgColor: string;
-    /**
-      * Specifies the beginning and end of the document body.
-      */
-    body: HTMLElement;
-    readonly characterSet: string;
-    /**
-      * Gets or sets the character set used to encode the object.
-      */
-    charset: string;
-    /**
-      * Gets a value that indicates whether standards-compliant mode is switched on for the object.
-      */
-    readonly compatMode: string;
-    cookie: string;
-    readonly currentScript: HTMLScriptElement | SVGScriptElement;
-    /**
-      * Gets the default character set from the current regional language settings.
-      */
-    readonly defaultCharset: string;
-    readonly defaultView: Window;
-    /**
-      * Sets or gets a value that indicates whether the document can be edited.
-      */
-    designMode: string;
-    /**
-      * Sets or retrieves a value that indicates the reading order of the object. 
-      */
-    dir: string;
-    /**
-      * Gets an object representing the document type declaration associated with the current document. 
-      */
-    readonly doctype: DocumentType;
-    /**
-      * Gets a reference to the root node of the document. 
-      */
-    documentElement: HTMLElement;
-    /**
-      * Sets or gets the security domain of the document. 
-      */
-    domain: string;
-    /**
-      * Retrieves a collection of all embed objects in the document.
-      */
-    embeds: HTMLCollectionOf<HTMLEmbedElement>;
-    /**
-      * Sets or gets the foreground (text) color of the document.
-      */
-    fgColor: string;
-    /**
-      * Retrieves a collection, in source order, of all form objects in the document.
-      */
-    forms: HTMLCollectionOf<HTMLFormElement>;
-    readonly fullscreenElement: Element | null;
-    readonly fullscreenEnabled: boolean;
-    readonly head: HTMLHeadElement;
-    readonly hidden: boolean;
-    /**
-      * Retrieves a collection, in source order, of img objects in the document.
-      */
-    images: HTMLCollectionOf<HTMLImageElement>;
-    /**
-      * Gets the implementation object of the current document. 
-      */
-    readonly implementation: DOMImplementation;
-    /**
-      * Returns the character encoding used to create the webpage that is loaded into the document object.
-      */
-    readonly inputEncoding: string | null;
-    /**
-      * Gets the date that the page was last modified, if the page supplies one. 
-      */
-    readonly lastModified: string;
-    /**
-      * Sets or gets the color of the document links. 
-      */
-    linkColor: string;
-    /**
-      * Retrieves a collection of all a objects that specify the href property and all area objects in the document.
-      */
-    links: HTMLCollectionOf<HTMLAnchorElement | HTMLAreaElement>;
-    /**
-      * Contains information about the current URL. 
-      */
-    readonly location: Location;
-    msCSSOMElementFloatMetrics: boolean;
-    msCapsLockWarningOff: boolean;
-    /**
-      * Fires when the user aborts the download.
-      * @param ev The event.
-      */
-    onabort: (this: this, ev: UIEvent) => any;
-    /**
-      * Fires when the object is set as the active element.
-      * @param ev The event.
-      */
-    onactivate: (this: this, ev: UIEvent) => any;
-    /**
-      * Fires immediately before the object is set as the active element.
-      * @param ev The event.
-      */
-    onbeforeactivate: (this: this, ev: UIEvent) => any;
-    /**
-      * Fires immediately before the activeElement is changed from the current object to another object in the parent document.
-      * @param ev The event.
-      */
-    onbeforedeactivate: (this: this, ev: UIEvent) => any;
-    /** 
-      * Fires when the object loses the input focus. 
-      * @param ev The focus event.
-      */
-    onblur: (this: this, ev: FocusEvent) => any;
-    /**
-      * Occurs when playback is possible, but would require further buffering. 
-      * @param ev The event.
-      */
-    oncanplay: (this: this, ev: Event) => any;
-    oncanplaythrough: (this: this, ev: Event) => any;
-    /**
-      * Fires when the contents of the object or selection have changed. 
-      * @param ev The event.
-      */
-    onchange: (this: this, ev: Event) => any;
-    /**
-      * Fires when the user clicks the left mouse button on the object
-      * @param ev The mouse event.
-      */
-    onclick: (this: this, ev: MouseEvent) => any;
-    /**
-      * Fires when the user clicks the right mouse button in the client area, opening the context menu. 
-      * @param ev The mouse event.
-      */
-    oncontextmenu: (this: this, ev: PointerEvent) => any;
-    /**
-      * Fires when the user double-clicks the object.
-      * @param ev The mouse event.
-      */
-    ondblclick: (this: this, ev: MouseEvent) => any;
-    /**
-      * Fires when the activeElement is changed from the current object to another object in the parent document.
-      * @param ev The UI Event
-      */
-    ondeactivate: (this: this, ev: UIEvent) => any;
-    /**
-      * Fires on the source object continuously during a drag operation.
-      * @param ev The event.
-      */
-    ondrag: (this: this, ev: DragEvent) => any;
-    /**
-      * Fires on the source object when the user releases the mouse at the close of a drag operation.
-      * @param ev The event.
-      */
-    ondragend: (this: this, ev: DragEvent) => any;
-    /** 
-      * Fires on the target element when the user drags the object to a valid drop target.
-      * @param ev The drag event.
-      */
-    ondragenter: (this: this, ev: DragEvent) => any;
-    /** 
-      * Fires on the target object when the user moves the mouse out of a valid drop target during a drag operation.
-      * @param ev The drag event.
-      */
-    ondragleave: (this: this, ev: DragEvent) => any;
-    /**
-      * Fires on the target element continuously while the user drags the object over a valid drop target.
-      * @param ev The event.
-      */
-    ondragover: (this: this, ev: DragEvent) => any;
-    /**
-      * Fires on the source object when the user starts to drag a text selection or selected object. 
-      * @param ev The event.
-      */
-    ondragstart: (this: this, ev: DragEvent) => any;
-    ondrop: (this: this, ev: DragEvent) => any;
-    /**
-      * Occurs when the duration attribute is updated. 
-      * @param ev The event.
-      */
-    ondurationchange: (this: this, ev: Event) => any;
-    /**
-      * Occurs when the media element is reset to its initial state. 
-      * @param ev The event.
-      */
-    onemptied: (this: this, ev: Event) => any;
-    /**
-      * Occurs when the end of playback is reached. 
-      * @param ev The event
-      */
-    onended: (this: this, ev: MediaStreamErrorEvent) => any;
-    /**
-      * Fires when an error occurs during object loading.
-      * @param ev The event.
-      */
-    onerror: (this: this, ev: ErrorEvent) => any;
-    /**
-      * Fires when the object receives focus. 
-      * @param ev The event.
-      */
-    onfocus: (this: this, ev: FocusEvent) => any;
-    onfullscreenchange: (this: this, ev: Event) => any;
-    onfullscreenerror: (this: this, ev: Event) => any;
-    oninput: (this: this, ev: Event) => any;
-    oninvalid: (this: this, ev: Event) => any;
-    /**
-      * Fires when the user presses a key.
-      * @param ev The keyboard event
-      */
-    onkeydown: (this: this, ev: KeyboardEvent) => any;
-    /**
-      * Fires when the user presses an alphanumeric key.
-      * @param ev The event.
-      */
-    onkeypress: (this: this, ev: KeyboardEvent) => any;
-    /**
-      * Fires when the user releases a key.
-      * @param ev The keyboard event
-      */
-    onkeyup: (this: this, ev: KeyboardEvent) => any;
-    /**
-      * Fires immediately after the browser loads the object. 
-      * @param ev The event.
-      */
-    onload: (this: this, ev: Event) => any;
-    /**
-      * Occurs when media data is loaded at the current playback position. 
-      * @param ev The event.
-      */
-    onloadeddata: (this: this, ev: Event) => any;
-    /**
-      * Occurs when the duration and dimensions of the media have been determined.
-      * @param ev The event.
-      */
-    onloadedmetadata: (this: this, ev: Event) => any;
-    /**
-      * Occurs when Internet Explorer begins looking for media data. 
-      * @param ev The event.
-      */
-    onloadstart: (this: this, ev: Event) => any;
-    /**
-      * Fires when the user clicks the object with either mouse button. 
-      * @param ev The mouse event.
-      */
-    onmousedown: (this: this, ev: MouseEvent) => any;
-    /**
-      * Fires when the user moves the mouse over the object. 
-      * @param ev The mouse event.
-      */
-    onmousemove: (this: this, ev: MouseEvent) => any;
-    /**
-      * Fires when the user moves the mouse pointer outside the boundaries of the object. 
-      * @param ev The mouse event.
-      */
-    onmouseout: (this: this, ev: MouseEvent) => any;
-    /**
-      * Fires when the user moves the mouse pointer into the object.
-      * @param ev The mouse event.
-      */
-    onmouseover: (this: this, ev: MouseEvent) => any;
-    /**
-      * Fires when the user releases a mouse button while the mouse is over the object. 
-      * @param ev The mouse event.
-      */
-    onmouseup: (this: this, ev: MouseEvent) => any;
-    /**
-      * Fires when the wheel button is rotated. 
-      * @param ev The mouse event
-      */
-    onmousewheel: (this: this, ev: WheelEvent) => any;
-    onmscontentzoom: (this: this, ev: UIEvent) => any;
-    onmsgesturechange: (this: this, ev: MSGestureEvent) => any;
-    onmsgesturedoubletap: (this: this, ev: MSGestureEvent) => any;
-    onmsgestureend: (this: this, ev: MSGestureEvent) => any;
-    onmsgesturehold: (this: this, ev: MSGestureEvent) => any;
-    onmsgesturestart: (this: this, ev: MSGestureEvent) => any;
-    onmsgesturetap: (this: this, ev: MSGestureEvent) => any;
-    onmsinertiastart: (this: this, ev: MSGestureEvent) => any;
-    onmsmanipulationstatechanged: (this: this, ev: MSManipulationEvent) => any;
-    onmspointercancel: (this: this, ev: MSPointerEvent) => any;
-    onmspointerdown: (this: this, ev: MSPointerEvent) => any;
-    onmspointerenter: (this: this, ev: MSPointerEvent) => any;
-    onmspointerleave: (this: this, ev: MSPointerEvent) => any;
-    onmspointermove: (this: this, ev: MSPointerEvent) => any;
-    onmspointerout: (this: this, ev: MSPointerEvent) => any;
-    onmspointerover: (this: this, ev: MSPointerEvent) => any;
-    onmspointerup: (this: this, ev: MSPointerEvent) => any;
-    /**
-      * Occurs when an item is removed from a Jump List of a webpage running in Site Mode. 
-      * @param ev The event.
-      */
-    onmssitemodejumplistitemremoved: (this: this, ev: MSSiteModeEvent) => any;
-    /**
-      * Occurs when a user clicks a button in a Thumbnail Toolbar of a webpage running in Site Mode.
-      * @param ev The event.
-      */
-    onmsthumbnailclick: (this: this, ev: MSSiteModeEvent) => any;
-    /**
-      * Occurs when playback is paused.
-      * @param ev The event.
-      */
-    onpause: (this: this, ev: Event) => any;
-    /**
-      * Occurs when the play method is requested. 
-      * @param ev The event.
-      */
-    onplay: (this: this, ev: Event) => any;
-    /**
-      * Occurs when the audio or video has started playing. 
-      * @param ev The event.
-      */
-    onplaying: (this: this, ev: Event) => any;
-    onpointerlockchange: (this: this, ev: Event) => any;
-    onpointerlockerror: (this: this, ev: Event) => any;
-    /**
-      * Occurs to indicate progress while downloading media data. 
-      * @param ev The event.
-      */
-    onprogress: (this: this, ev: ProgressEvent) => any;
-    /**
-      * Occurs when the playback rate is increased or decreased. 
-      * @param ev The event.
-      */
-    onratechange: (this: this, ev: Event) => any;
-    /**
-      * Fires when the state of the object has changed.
-      * @param ev The event
-      */
-    onreadystatechange: (this: this, ev: ProgressEvent) => any;
-    /**
-      * Fires when the user resets a form. 
-      * @param ev The event.
-      */
-    onreset: (this: this, ev: Event) => any;
-    /**
-      * Fires when the user repositions the scroll box in the scroll bar on the object. 
-      * @param ev The event.
-      */
-    onscroll: (this: this, ev: UIEvent) => any;
-    /**
-      * Occurs when the seek operation ends. 
-      * @param ev The event.
-      */
-    onseeked: (this: this, ev: Event) => any;
-    /**
-      * Occurs when the current playback position is moved. 
-      * @param ev The event.
-      */
-    onseeking: (this: this, ev: Event) => any;
-    /**
-      * Fires when the current selection changes.
-      * @param ev The event.
-      */
-    onselect: (this: this, ev: UIEvent) => any;
-    /**
-      * Fires when the selection state of a document changes.
-      * @param ev The event.
-      */
-    onselectionchange: (this: this, ev: Event) => any;
-    onselectstart: (this: this, ev: Event) => any;
-    /**
-      * Occurs when the download has stopped. 
-      * @param ev The event.
-      */
-    onstalled: (this: this, ev: Event) => any;
-    /**
-      * Fires when the user clicks the Stop button or leaves the Web page.
-      * @param ev The event.
-      */
-    onstop: (this: this, ev: Event) => any;
-    onsubmit: (this: this, ev: Event) => any;
-    /**
-      * Occurs if the load operation has been intentionally halted. 
-      * @param ev The event.
-      */
-    onsuspend: (this: this, ev: Event) => any;
-    /**
-      * Occurs to indicate the current playback position.
-      * @param ev The event.
-      */
-    ontimeupdate: (this: this, ev: Event) => any;
-    ontouchcancel: (ev: TouchEvent) => any;
-    ontouchend: (ev: TouchEvent) => any;
-    ontouchmove: (ev: TouchEvent) => any;
-    ontouchstart: (ev: TouchEvent) => any;
-    /**
-      * Occurs when the volume is changed, or playback is muted or unmuted.
-      * @param ev The event.
-      */
-    onvolumechange: (this: this, ev: Event) => any;
-    /**
-      * Occurs when playback stops because the next frame of a video resource is not available. 
-      * @param ev The event.
-      */
-    onwaiting: (this: this, ev: Event) => any;
-    onwebkitfullscreenchange: (this: this, ev: Event) => any;
-    onwebkitfullscreenerror: (this: this, ev: Event) => any;
-    plugins: HTMLCollectionOf<HTMLEmbedElement>;
-    readonly pointerLockElement: Element;
-    /**
-      * Retrieves a value that indicates the current state of the object.
-      */
-    readonly readyState: string;
-    /**
-      * Gets the URL of the location that referred the user to the current page.
-      */
-    readonly referrer: string;
-    /**
-      * Gets the root svg element in the document hierarchy.
-      */
-    readonly rootElement: SVGSVGElement;
-    /**
-      * Retrieves a collection of all script objects in the document.
-      */
-    scripts: HTMLCollectionOf<HTMLScriptElement>;
-    readonly scrollingElement: Element | null;
-    /**
-      * Retrieves a collection of styleSheet objects representing the style sheets that correspond to each instance of a link or style object in the document.
-      */
-    readonly styleSheets: StyleSheetList;
-    /**
-      * Contains the title of the document.
-      */
-    title: string;
-    readonly visibilityState: string;
-    /** 
-      * Sets or gets the color of the links that the user has visited.
-      */
-    vlinkColor: string;
-    readonly webkitCurrentFullScreenElement: Element | null;
-    readonly webkitFullscreenElement: Element | null;
-    readonly webkitFullscreenEnabled: boolean;
-    readonly webkitIsFullScreen: boolean;
-    readonly xmlEncoding: string | null;
-    xmlStandalone: boolean;
-    /**
-      * Gets or sets the version attribute specified in the declaration of an XML document.
-      */
-    xmlVersion: string | null;
-    adoptNode(source: Node): Node;
-    captureEvents(): void;
-    caretRangeFromPoint(x: number, y: number): Range;
-    clear(): void;
-    /**
-      * Closes an output stream and forces the sent data to display.
-      */
-    close(): void;
-    /**
-      * Creates an attribute object with a specified name.
-      * @param name String that sets the attribute object's name.
-      */
-    createAttribute(name: string): Attr;
-    createAttributeNS(namespaceURI: string | null, qualifiedName: string): Attr;
-    createCDATASection(data: string): CDATASection;
-    /**
-      * Creates a comment object with the specified data.
-      * @param data Sets the comment object's data.
-      */
-    createComment(data: string): Comment;
-    /**
-      * Creates a new document.
-      */
-    createDocumentFragment(): DocumentFragment;
-    /**
-      * Creates an instance of the element for the specified tag.
-      * @param tagName The name of an element.
-      */
-    createElement(tagName: "a"): HTMLAnchorElement;
-    createElement(tagName: "applet"): HTMLAppletElement;
-    createElement(tagName: "area"): HTMLAreaElement;
-    createElement(tagName: "audio"): HTMLAudioElement;
-    createElement(tagName: "base"): HTMLBaseElement;
-    createElement(tagName: "basefont"): HTMLBaseFontElement;
-    createElement(tagName: "blockquote"): HTMLQuoteElement;
-    createElement(tagName: "body"): HTMLBodyElement;
-    createElement(tagName: "br"): HTMLBRElement;
-    createElement(tagName: "button"): HTMLButtonElement;
-    createElement(tagName: "canvas"): HTMLCanvasElement;
-    createElement(tagName: "caption"): HTMLTableCaptionElement;
-    createElement(tagName: "col"): HTMLTableColElement;
-    createElement(tagName: "colgroup"): HTMLTableColElement;
-    createElement(tagName: "datalist"): HTMLDataListElement;
-    createElement(tagName: "del"): HTMLModElement;
-    createElement(tagName: "dir"): HTMLDirectoryElement;
-    createElement(tagName: "div"): HTMLDivElement;
-    createElement(tagName: "dl"): HTMLDListElement;
-    createElement(tagName: "embed"): HTMLEmbedElement;
-    createElement(tagName: "fieldset"): HTMLFieldSetElement;
-    createElement(tagName: "font"): HTMLFontElement;
-    createElement(tagName: "form"): HTMLFormElement;
-    createElement(tagName: "frame"): HTMLFrameElement;
-    createElement(tagName: "frameset"): HTMLFrameSetElement;
-    createElement(tagName: "h1"): HTMLHeadingElement;
-    createElement(tagName: "h2"): HTMLHeadingElement;
-    createElement(tagName: "h3"): HTMLHeadingElement;
-    createElement(tagName: "h4"): HTMLHeadingElement;
-    createElement(tagName: "h5"): HTMLHeadingElement;
-    createElement(tagName: "h6"): HTMLHeadingElement;
-    createElement(tagName: "head"): HTMLHeadElement;
-    createElement(tagName: "hr"): HTMLHRElement;
-    createElement(tagName: "html"): HTMLHtmlElement;
-    createElement(tagName: "iframe"): HTMLIFrameElement;
-    createElement(tagName: "img"): HTMLImageElement;
-    createElement(tagName: "input"): HTMLInputElement;
-    createElement(tagName: "ins"): HTMLModElement;
-    createElement(tagName: "isindex"): HTMLUnknownElement;
-    createElement(tagName: "label"): HTMLLabelElement;
-    createElement(tagName: "legend"): HTMLLegendElement;
-    createElement(tagName: "li"): HTMLLIElement;
-    createElement(tagName: "link"): HTMLLinkElement;
-    createElement(tagName: "listing"): HTMLPreElement;
-    createElement(tagName: "map"): HTMLMapElement;
-    createElement(tagName: "marquee"): HTMLMarqueeElement;
-    createElement(tagName: "menu"): HTMLMenuElement;
-    createElement(tagName: "meta"): HTMLMetaElement;
-    createElement(tagName: "meter"): HTMLMeterElement;
-    createElement(tagName: "nextid"): HTMLUnknownElement;
-    createElement(tagName: "object"): HTMLObjectElement;
-    createElement(tagName: "ol"): HTMLOListElement;
-    createElement(tagName: "optgroup"): HTMLOptGroupElement;
-    createElement(tagName: "option"): HTMLOptionElement;
-    createElement(tagName: "p"): HTMLParagraphElement;
-    createElement(tagName: "param"): HTMLParamElement;
-    createElement(tagName: "picture"): HTMLPictureElement;
-    createElement(tagName: "pre"): HTMLPreElement;
-    createElement(tagName: "progress"): HTMLProgressElement;
-    createElement(tagName: "q"): HTMLQuoteElement;
-    createElement(tagName: "script"): HTMLScriptElement;
-    createElement(tagName: "select"): HTMLSelectElement;
-    createElement(tagName: "source"): HTMLSourceElement;
-    createElement(tagName: "span"): HTMLSpanElement;
-    createElement(tagName: "style"): HTMLStyleElement;
-    createElement(tagName: "table"): HTMLTableElement;
-    createElement(tagName: "tbody"): HTMLTableSectionElement;
-    createElement(tagName: "td"): HTMLTableDataCellElement;
-    createElement(tagName: "template"): HTMLTemplateElement;
-    createElement(tagName: "textarea"): HTMLTextAreaElement;
-    createElement(tagName: "tfoot"): HTMLTableSectionElement;
-    createElement(tagName: "th"): HTMLTableHeaderCellElement;
-    createElement(tagName: "thead"): HTMLTableSectionElement;
-    createElement(tagName: "title"): HTMLTitleElement;
-    createElement(tagName: "tr"): HTMLTableRowElement;
-    createElement(tagName: "track"): HTMLTrackElement;
-    createElement(tagName: "ul"): HTMLUListElement;
-    createElement(tagName: "video"): HTMLVideoElement;
-    createElement(tagName: "x-ms-webview"): MSHTMLWebViewElement;
-    createElement(tagName: "xmp"): HTMLPreElement;
-    createElement(tagName: string): HTMLElement;
-    createElementNS(namespaceURI: "http://www.w3.org/1999/xhtml", qualifiedName: string): HTMLElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "a"): SVGAElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "circle"): SVGCircleElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "clipPath"): SVGClipPathElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "componentTransferFunction"): SVGComponentTransferFunctionElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "defs"): SVGDefsElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "desc"): SVGDescElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "ellipse"): SVGEllipseElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feBlend"): SVGFEBlendElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feColorMatrix"): SVGFEColorMatrixElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feComponentTransfer"): SVGFEComponentTransferElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feComposite"): SVGFECompositeElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feConvolveMatrix"): SVGFEConvolveMatrixElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feDiffuseLighting"): SVGFEDiffuseLightingElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feDisplacementMap"): SVGFEDisplacementMapElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feDistantLight"): SVGFEDistantLightElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feFlood"): SVGFEFloodElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feFuncA"): SVGFEFuncAElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feFuncB"): SVGFEFuncBElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feFuncG"): SVGFEFuncGElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feFuncR"): SVGFEFuncRElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feGaussianBlur"): SVGFEGaussianBlurElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feImage"): SVGFEImageElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feMerge"): SVGFEMergeElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feMergeNode"): SVGFEMergeNodeElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feMorphology"): SVGFEMorphologyElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feOffset"): SVGFEOffsetElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "fePointLight"): SVGFEPointLightElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feSpecularLighting"): SVGFESpecularLightingElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feSpotLight"): SVGFESpotLightElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feTile"): SVGFETileElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feTurbulence"): SVGFETurbulenceElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "filter"): SVGFilterElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "foreignObject"): SVGForeignObjectElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "g"): SVGGElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "image"): SVGImageElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "gradient"): SVGGradientElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "line"): SVGLineElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "linearGradient"): SVGLinearGradientElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "marker"): SVGMarkerElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "mask"): SVGMaskElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "path"): SVGPathElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "metadata"): SVGMetadataElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "pattern"): SVGPatternElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "polygon"): SVGPolygonElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "polyline"): SVGPolylineElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "radialGradient"): SVGRadialGradientElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "rect"): SVGRectElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "svg"): SVGSVGElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "script"): SVGScriptElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "stop"): SVGStopElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "style"): SVGStyleElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "switch"): SVGSwitchElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "symbol"): SVGSymbolElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "tspan"): SVGTSpanElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "textContent"): SVGTextContentElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "text"): SVGTextElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "textPath"): SVGTextPathElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "textPositioning"): SVGTextPositioningElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "title"): SVGTitleElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "use"): SVGUseElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "view"): SVGViewElement
-    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: string): SVGElement
-    createElementNS(namespaceURI: string | null, qualifiedName: string): Element;
-    createExpression(expression: string, resolver: XPathNSResolver): XPathExpression;
-    createNSResolver(nodeResolver: Node): XPathNSResolver;
-    /**
-      * Creates a NodeIterator object that you can use to traverse filtered lists of nodes or elements in a document. 
-      * @param root The root element or node to start traversing on.
-      * @param whatToShow The type of nodes or elements to appear in the node list
-      * @param filter A custom NodeFilter function to use. For more information, see filter. Use null for no filter.
-      * @param entityReferenceExpansion A flag that specifies whether entity reference nodes are expanded.
-      */
-    createNodeIterator(root: Node, whatToShow?: number, filter?: NodeFilter, entityReferenceExpansion?: boolean): NodeIterator;
-    createProcessingInstruction(target: string, data: string): ProcessingInstruction;
-    /**
-      *  Returns an empty range object that has both of its boundary points positioned at the beginning of the document. 
-      */
-    createRange(): Range;
-    /**
-      * Creates a text string from the specified value. 
-      * @param data String that specifies the nodeValue property of the text node.
-      */
-    createTextNode(data: string): Text;
-    createTouch(view: Window, target: EventTarget, identifier: number, pageX: number, pageY: number, screenX: number, screenY: number): Touch;
-    createTouchList(...touches: Touch[]): TouchList;
-    /**
-      * Creates a TreeWalker object that you can use to traverse filtered lists of nodes or elements in a document.
-      * @param root The root element or node to start traversing on.
-      * @param whatToShow The type of nodes or elements to appear in the node list. For more information, see whatToShow.
-      * @param filter A custom NodeFilter function to use.
-      * @param entityReferenceExpansion A flag that specifies whether entity reference nodes are expanded.
-      */
-    createTreeWalker(root: Node, whatToShow?: number, filter?: NodeFilter, entityReferenceExpansion?: boolean): TreeWalker;
-    /**
-      * Returns the element for the specified x coordinate and the specified y coordinate. 
-      * @param x The x-offset
-      * @param y The y-offset
-      */
-    elementFromPoint(x: number, y: number): Element;
-    evaluate(expression: string, contextNode: Node, resolver: XPathNSResolver, type: number, result: XPathResult): XPathResult;
-    /**
-      * Executes a command on the current document, current selection, or the given range.
-      * @param commandId String that specifies the command to execute. This command can be any of the command identifiers that can be executed in script.
-      * @param showUI Display the user interface, defaults to false.
-      * @param value Value to assign.
-      */
-    execCommand(commandId: string, showUI?: boolean, value?: any): boolean;
-    /**
-      * Displays help information for the given command identifier.
-      * @param commandId Displays help information for the given command identifier.
-      */
-    execCommandShowHelp(commandId: string): boolean;
-    exitFullscreen(): void;
-    exitPointerLock(): void;
-    /**
-      * Causes the element to receive the focus and executes the code specified by the onfocus event.
-      */
-    focus(): void;
-    /**
-      * Returns a reference to the first object with the specified value of the ID or NAME attribute.
-      * @param elementId String that specifies the ID value. Case-insensitive.
-      */
-    getElementById(elementId: string): HTMLElement | null;
-    getElementsByClassName(classNames: string): HTMLCollectionOf<Element>;
-    /**
-      * Gets a collection of objects based on the value of the NAME or ID attribute.
-      * @param elementName Gets a collection of objects based on the value of the NAME or ID attribute.
-      */
-    getElementsByName(elementName: string): NodeListOf<HTMLElement>;
-    /**
-      * Retrieves a collection of objects based on the specified element name.
-      * @param name Specifies the name of an element.
-      */
-    getElementsByTagName(tagname: "a"): NodeListOf<HTMLAnchorElement>;
-    getElementsByTagName(tagname: "abbr"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "acronym"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "address"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "applet"): NodeListOf<HTMLAppletElement>;
-    getElementsByTagName(tagname: "area"): NodeListOf<HTMLAreaElement>;
-    getElementsByTagName(tagname: "article"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "aside"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "audio"): NodeListOf<HTMLAudioElement>;
-    getElementsByTagName(tagname: "b"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "base"): NodeListOf<HTMLBaseElement>;
-    getElementsByTagName(tagname: "basefont"): NodeListOf<HTMLBaseFontElement>;
-    getElementsByTagName(tagname: "bdo"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "big"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "blockquote"): NodeListOf<HTMLQuoteElement>;
-    getElementsByTagName(tagname: "body"): NodeListOf<HTMLBodyElement>;
-    getElementsByTagName(tagname: "br"): NodeListOf<HTMLBRElement>;
-    getElementsByTagName(tagname: "button"): NodeListOf<HTMLButtonElement>;
-    getElementsByTagName(tagname: "canvas"): NodeListOf<HTMLCanvasElement>;
-    getElementsByTagName(tagname: "caption"): NodeListOf<HTMLTableCaptionElement>;
-    getElementsByTagName(tagname: "center"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "circle"): NodeListOf<SVGCircleElement>;
-    getElementsByTagName(tagname: "cite"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "clippath"): NodeListOf<SVGClipPathElement>;
-    getElementsByTagName(tagname: "code"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "col"): NodeListOf<HTMLTableColElement>;
-    getElementsByTagName(tagname: "colgroup"): NodeListOf<HTMLTableColElement>;
-    getElementsByTagName(tagname: "datalist"): NodeListOf<HTMLDataListElement>;
-    getElementsByTagName(tagname: "dd"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "defs"): NodeListOf<SVGDefsElement>;
-    getElementsByTagName(tagname: "del"): NodeListOf<HTMLModElement>;
-    getElementsByTagName(tagname: "desc"): NodeListOf<SVGDescElement>;
-    getElementsByTagName(tagname: "dfn"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "dir"): NodeListOf<HTMLDirectoryElement>;
-    getElementsByTagName(tagname: "div"): NodeListOf<HTMLDivElement>;
-    getElementsByTagName(tagname: "dl"): NodeListOf<HTMLDListElement>;
-    getElementsByTagName(tagname: "dt"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "ellipse"): NodeListOf<SVGEllipseElement>;
-    getElementsByTagName(tagname: "em"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "embed"): NodeListOf<HTMLEmbedElement>;
-    getElementsByTagName(tagname: "feblend"): NodeListOf<SVGFEBlendElement>;
-    getElementsByTagName(tagname: "fecolormatrix"): NodeListOf<SVGFEColorMatrixElement>;
-    getElementsByTagName(tagname: "fecomponenttransfer"): NodeListOf<SVGFEComponentTransferElement>;
-    getElementsByTagName(tagname: "fecomposite"): NodeListOf<SVGFECompositeElement>;
-    getElementsByTagName(tagname: "feconvolvematrix"): NodeListOf<SVGFEConvolveMatrixElement>;
-    getElementsByTagName(tagname: "fediffuselighting"): NodeListOf<SVGFEDiffuseLightingElement>;
-    getElementsByTagName(tagname: "fedisplacementmap"): NodeListOf<SVGFEDisplacementMapElement>;
-    getElementsByTagName(tagname: "fedistantlight"): NodeListOf<SVGFEDistantLightElement>;
-    getElementsByTagName(tagname: "feflood"): NodeListOf<SVGFEFloodElement>;
-    getElementsByTagName(tagname: "fefunca"): NodeListOf<SVGFEFuncAElement>;
-    getElementsByTagName(tagname: "fefuncb"): NodeListOf<SVGFEFuncBElement>;
-    getElementsByTagName(tagname: "fefuncg"): NodeListOf<SVGFEFuncGElement>;
-    getElementsByTagName(tagname: "fefuncr"): NodeListOf<SVGFEFuncRElement>;
-    getElementsByTagName(tagname: "fegaussianblur"): NodeListOf<SVGFEGaussianBlurElement>;
-    getElementsByTagName(tagname: "feimage"): NodeListOf<SVGFEImageElement>;
-    getElementsByTagName(tagname: "femerge"): NodeListOf<SVGFEMergeElement>;
-    getElementsByTagName(tagname: "femergenode"): NodeListOf<SVGFEMergeNodeElement>;
-    getElementsByTagName(tagname: "femorphology"): NodeListOf<SVGFEMorphologyElement>;
-    getElementsByTagName(tagname: "feoffset"): NodeListOf<SVGFEOffsetElement>;
-    getElementsByTagName(tagname: "fepointlight"): NodeListOf<SVGFEPointLightElement>;
-    getElementsByTagName(tagname: "fespecularlighting"): NodeListOf<SVGFESpecularLightingElement>;
-    getElementsByTagName(tagname: "fespotlight"): NodeListOf<SVGFESpotLightElement>;
-    getElementsByTagName(tagname: "fetile"): NodeListOf<SVGFETileElement>;
-    getElementsByTagName(tagname: "feturbulence"): NodeListOf<SVGFETurbulenceElement>;
-    getElementsByTagName(tagname: "fieldset"): NodeListOf<HTMLFieldSetElement>;
-    getElementsByTagName(tagname: "figcaption"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "figure"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "filter"): NodeListOf<SVGFilterElement>;
-    getElementsByTagName(tagname: "font"): NodeListOf<HTMLFontElement>;
-    getElementsByTagName(tagname: "footer"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "foreignobject"): NodeListOf<SVGForeignObjectElement>;
-    getElementsByTagName(tagname: "form"): NodeListOf<HTMLFormElement>;
-    getElementsByTagName(tagname: "frame"): NodeListOf<HTMLFrameElement>;
-    getElementsByTagName(tagname: "frameset"): NodeListOf<HTMLFrameSetElement>;
-    getElementsByTagName(tagname: "g"): NodeListOf<SVGGElement>;
-    getElementsByTagName(tagname: "h1"): NodeListOf<HTMLHeadingElement>;
-    getElementsByTagName(tagname: "h2"): NodeListOf<HTMLHeadingElement>;
-    getElementsByTagName(tagname: "h3"): NodeListOf<HTMLHeadingElement>;
-    getElementsByTagName(tagname: "h4"): NodeListOf<HTMLHeadingElement>;
-    getElementsByTagName(tagname: "h5"): NodeListOf<HTMLHeadingElement>;
-    getElementsByTagName(tagname: "h6"): NodeListOf<HTMLHeadingElement>;
-    getElementsByTagName(tagname: "head"): NodeListOf<HTMLHeadElement>;
-    getElementsByTagName(tagname: "header"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "hgroup"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "hr"): NodeListOf<HTMLHRElement>;
-    getElementsByTagName(tagname: "html"): NodeListOf<HTMLHtmlElement>;
-    getElementsByTagName(tagname: "i"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "iframe"): NodeListOf<HTMLIFrameElement>;
-    getElementsByTagName(tagname: "image"): NodeListOf<SVGImageElement>;
-    getElementsByTagName(tagname: "img"): NodeListOf<HTMLImageElement>;
-    getElementsByTagName(tagname: "input"): NodeListOf<HTMLInputElement>;
-    getElementsByTagName(tagname: "ins"): NodeListOf<HTMLModElement>;
-    getElementsByTagName(tagname: "isindex"): NodeListOf<HTMLUnknownElement>;
-    getElementsByTagName(tagname: "kbd"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "keygen"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "label"): NodeListOf<HTMLLabelElement>;
-    getElementsByTagName(tagname: "legend"): NodeListOf<HTMLLegendElement>;
-    getElementsByTagName(tagname: "li"): NodeListOf<HTMLLIElement>;
-    getElementsByTagName(tagname: "line"): NodeListOf<SVGLineElement>;
-    getElementsByTagName(tagname: "lineargradient"): NodeListOf<SVGLinearGradientElement>;
-    getElementsByTagName(tagname: "link"): NodeListOf<HTMLLinkElement>;
-    getElementsByTagName(tagname: "listing"): NodeListOf<HTMLPreElement>;
-    getElementsByTagName(tagname: "map"): NodeListOf<HTMLMapElement>;
-    getElementsByTagName(tagname: "mark"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "marker"): NodeListOf<SVGMarkerElement>;
-    getElementsByTagName(tagname: "marquee"): NodeListOf<HTMLMarqueeElement>;
-    getElementsByTagName(tagname: "mask"): NodeListOf<SVGMaskElement>;
-    getElementsByTagName(tagname: "menu"): NodeListOf<HTMLMenuElement>;
-    getElementsByTagName(tagname: "meta"): NodeListOf<HTMLMetaElement>;
-    getElementsByTagName(tagname: "metadata"): NodeListOf<SVGMetadataElement>;
-    getElementsByTagName(tagname: "meter"): NodeListOf<HTMLMeterElement>;
-    getElementsByTagName(tagname: "nav"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "nextid"): NodeListOf<HTMLUnknownElement>;
-    getElementsByTagName(tagname: "nobr"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "noframes"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "noscript"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "object"): NodeListOf<HTMLObjectElement>;
-    getElementsByTagName(tagname: "ol"): NodeListOf<HTMLOListElement>;
-    getElementsByTagName(tagname: "optgroup"): NodeListOf<HTMLOptGroupElement>;
-    getElementsByTagName(tagname: "option"): NodeListOf<HTMLOptionElement>;
-    getElementsByTagName(tagname: "p"): NodeListOf<HTMLParagraphElement>;
-    getElementsByTagName(tagname: "param"): NodeListOf<HTMLParamElement>;
-    getElementsByTagName(tagname: "path"): NodeListOf<SVGPathElement>;
-    getElementsByTagName(tagname: "pattern"): NodeListOf<SVGPatternElement>;
-    getElementsByTagName(tagname: "picture"): NodeListOf<HTMLPictureElement>;
-    getElementsByTagName(tagname: "plaintext"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "polygon"): NodeListOf<SVGPolygonElement>;
-    getElementsByTagName(tagname: "polyline"): NodeListOf<SVGPolylineElement>;
-    getElementsByTagName(tagname: "pre"): NodeListOf<HTMLPreElement>;
-    getElementsByTagName(tagname: "progress"): NodeListOf<HTMLProgressElement>;
-    getElementsByTagName(tagname: "q"): NodeListOf<HTMLQuoteElement>;
-    getElementsByTagName(tagname: "radialgradient"): NodeListOf<SVGRadialGradientElement>;
-    getElementsByTagName(tagname: "rect"): NodeListOf<SVGRectElement>;
-    getElementsByTagName(tagname: "rt"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "ruby"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "s"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "samp"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "script"): NodeListOf<HTMLScriptElement>;
-    getElementsByTagName(tagname: "section"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "select"): NodeListOf<HTMLSelectElement>;
-    getElementsByTagName(tagname: "small"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "source"): NodeListOf<HTMLSourceElement>;
-    getElementsByTagName(tagname: "span"): NodeListOf<HTMLSpanElement>;
-    getElementsByTagName(tagname: "stop"): NodeListOf<SVGStopElement>;
-    getElementsByTagName(tagname: "strike"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "strong"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "style"): NodeListOf<HTMLStyleElement>;
-    getElementsByTagName(tagname: "sub"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "sup"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "svg"): NodeListOf<SVGSVGElement>;
-    getElementsByTagName(tagname: "switch"): NodeListOf<SVGSwitchElement>;
-    getElementsByTagName(tagname: "symbol"): NodeListOf<SVGSymbolElement>;
-    getElementsByTagName(tagname: "table"): NodeListOf<HTMLTableElement>;
-    getElementsByTagName(tagname: "tbody"): NodeListOf<HTMLTableSectionElement>;
-    getElementsByTagName(tagname: "td"): NodeListOf<HTMLTableDataCellElement>;
-    getElementsByTagName(tagname: "template"): NodeListOf<HTMLTemplateElement>;
-    getElementsByTagName(tagname: "text"): NodeListOf<SVGTextElement>;
-    getElementsByTagName(tagname: "textpath"): NodeListOf<SVGTextPathElement>;
-    getElementsByTagName(tagname: "textarea"): NodeListOf<HTMLTextAreaElement>;
-    getElementsByTagName(tagname: "tfoot"): NodeListOf<HTMLTableSectionElement>;
-    getElementsByTagName(tagname: "th"): NodeListOf<HTMLTableHeaderCellElement>;
-    getElementsByTagName(tagname: "thead"): NodeListOf<HTMLTableSectionElement>;
-    getElementsByTagName(tagname: "title"): NodeListOf<HTMLTitleElement>;
-    getElementsByTagName(tagname: "tr"): NodeListOf<HTMLTableRowElement>;
-    getElementsByTagName(tagname: "track"): NodeListOf<HTMLTrackElement>;
-    getElementsByTagName(tagname: "tspan"): NodeListOf<SVGTSpanElement>;
-    getElementsByTagName(tagname: "tt"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "u"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "ul"): NodeListOf<HTMLUListElement>;
-    getElementsByTagName(tagname: "use"): NodeListOf<SVGUseElement>;
-    getElementsByTagName(tagname: "var"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "video"): NodeListOf<HTMLVideoElement>;
-    getElementsByTagName(tagname: "view"): NodeListOf<SVGViewElement>;
-    getElementsByTagName(tagname: "wbr"): NodeListOf<HTMLElement>;
-    getElementsByTagName(tagname: "x-ms-webview"): NodeListOf<MSHTMLWebViewElement>;
-    getElementsByTagName(tagname: "xmp"): NodeListOf<HTMLPreElement>;
-    getElementsByTagName(tagname: string): NodeListOf<Element>;
-    getElementsByTagNameNS(namespaceURI: "http://www.w3.org/1999/xhtml", localName: string): HTMLCollectionOf<HTMLElement>;
-    getElementsByTagNameNS(namespaceURI: "http://www.w3.org/2000/svg", localName: string): HTMLCollectionOf<SVGElement>;
-    getElementsByTagNameNS(namespaceURI: string, localName: string): HTMLCollectionOf<Element>;
-    /**
-      * Returns an object representing the current selection of the document that is loaded into the object displaying a webpage.
-      */
-    getSelection(): Selection;
-    /**
-      * Gets a value indicating whether the object currently has focus.
-      */
-    hasFocus(): boolean;
-    importNode(importedNode: Node, deep: boolean): Node;
-    msElementsFromPoint(x: number, y: number): NodeListOf<Element>;
-    msElementsFromRect(left: number, top: number, width: number, height: number): NodeListOf<Element>;
-    /**
-      * Opens a new window and loads a document specified by a given URL. Also, opens a new window that uses the url parameter and the name parameter to collect the output of the write method and the writeln method.
-      * @param url Specifies a MIME type for the document.
-      * @param name Specifies the name of the window. This name is used as the value for the TARGET attribute on a form or an anchor element.
-      * @param features Contains a list of items separated by commas. Each item consists of an option and a value, separated by an equals sign (for example, "fullscreen=yes, toolbar=yes"). The following values are supported.
-      * @param replace Specifies whether the existing entry for the document is replaced in the history list.
-      */
-    open(url?: string, name?: string, features?: string, replace?: boolean): Document;
-    /** 
-      * Returns a Boolean value that indicates whether a specified command can be successfully executed using execCommand, given the current state of the document.
-      * @param commandId Specifies a command identifier.
-      */
-    queryCommandEnabled(commandId: string): boolean;
-    /**
-      * Returns a Boolean value that indicates whether the specified command is in the indeterminate state.
-      * @param commandId String that specifies a command identifier.
-      */
-    queryCommandIndeterm(commandId: string): boolean;
-    /**
-      * Returns a Boolean value that indicates the current state of the command.
-      * @param commandId String that specifies a command identifier.
-      */
-    queryCommandState(commandId: string): boolean;
-    /**
-      * Returns a Boolean value that indicates whether the current command is supported on the current range.
-      * @param commandId Specifies a command identifier.
-      */
-    queryCommandSupported(commandId: string): boolean;
-    /**
-      * Retrieves the string associated with a command.
-      * @param commandId String that contains the identifier of a command. This can be any command identifier given in the list of Command Identifiers. 
-      */
-    queryCommandText(commandId: string): string;
-    /**
-      * Returns the current value of the document, range, or current selection for the given command.
-      * @param commandId String that specifies a command identifier.
-      */
-    queryCommandValue(commandId: string): string;
-    releaseEvents(): void;
-    /**
-      * Allows updating the print settings for the page.
-      */
-    updateSettings(): void;
-    webkitCancelFullScreen(): void;
-    webkitExitFullscreen(): void;
-    /**
-      * Writes one or more HTML expressions to a document in the specified window. 
-      * @param content Specifies the text and HTML tags to write.
-      */
-    write(...content: string[]): void;
-    /**
-      * Writes one or more HTML expressions, followed by a carriage return, to a document in the specified window. 
-      * @param content The text and HTML tags to write.
-      */
-    writeln(...content: string[]): void;
-    addEventListener(type: "MSContentZoom", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureChange", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureDoubleTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureEnd", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureHold", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSInertiaStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSManipulationStateChanged", listener: (this: this, ev: MSManipulationEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerCancel", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerDown", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerEnter", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerLeave", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerMove", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOut", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOver", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerUp", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "abort", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "activate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforedeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "blur", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplay", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplaythrough", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "change", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "click", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "contextmenu", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dblclick", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "deactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drag", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragend", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragenter", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragleave", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragover", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragstart", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drop", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "durationchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "emptied", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "ended", listener: (this: this, ev: MediaStreamErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "focus", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "fullscreenchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "fullscreenerror", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "input", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "invalid", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "keydown", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keypress", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keyup", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadeddata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadedmetadata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousedown", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousemove", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseout", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseover", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseup", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousewheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mssitemodejumplistitemremoved", listener: (this: this, ev: MSSiteModeEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "msthumbnailclick", listener: (this: this, ev: MSSiteModeEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pause", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "play", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "playing", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointercancel", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerdown", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerenter", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerleave", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerlockchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerlockerror", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointermove", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerout", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerover", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerup", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "progress", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ratechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "readystatechange", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "reset", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "scroll", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeked", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeking", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "select", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "selectionchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "selectstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "stalled", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "stop", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "submit", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "suspend", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "timeupdate", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchcancel", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchend", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchmove", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchstart", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "volumechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "waiting", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenerror", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "wheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var Document: {
-    prototype: Document;
-    new(): Document;
-}
-
-interface DocumentFragment extends Node, NodeSelector, ParentNode {
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var DocumentFragment: {
-    prototype: DocumentFragment;
-    new(): DocumentFragment;
-}
-
-interface DocumentType extends Node, ChildNode {
-    readonly entities: NamedNodeMap;
-    readonly internalSubset: string | null;
-    readonly name: string;
-    readonly notations: NamedNodeMap;
-    readonly publicId: string | null;
-    readonly systemId: string | null;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var DocumentType: {
-    prototype: DocumentType;
-    new(): DocumentType;
-}
-
-interface DragEvent extends MouseEvent {
-    readonly dataTransfer: DataTransfer;
-    initDragEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, ctrlKeyArg: boolean, altKeyArg: boolean, shiftKeyArg: boolean, metaKeyArg: boolean, buttonArg: number, relatedTargetArg: EventTarget, dataTransferArg: DataTransfer): void;
-    msConvertURL(file: File, targetType: string, targetURL?: string): void;
-}
-
-declare var DragEvent: {
-    prototype: DragEvent;
-    new(): DragEvent;
-}
-
-interface DynamicsCompressorNode extends AudioNode {
-    readonly attack: AudioParam;
-    readonly knee: AudioParam;
-    readonly ratio: AudioParam;
-    readonly reduction: AudioParam;
-    readonly release: AudioParam;
-    readonly threshold: AudioParam;
-}
-
-declare var DynamicsCompressorNode: {
-    prototype: DynamicsCompressorNode;
-    new(): DynamicsCompressorNode;
-}
-
-interface EXT_frag_depth {
-}
-
-declare var EXT_frag_depth: {
-    prototype: EXT_frag_depth;
-    new(): EXT_frag_depth;
-}
-
-interface EXT_texture_filter_anisotropic {
-    readonly MAX_TEXTURE_MAX_ANISOTROPY_EXT: number;
-    readonly TEXTURE_MAX_ANISOTROPY_EXT: number;
-}
-
-declare var EXT_texture_filter_anisotropic: {
-    prototype: EXT_texture_filter_anisotropic;
-    new(): EXT_texture_filter_anisotropic;
-    readonly MAX_TEXTURE_MAX_ANISOTROPY_EXT: number;
-    readonly TEXTURE_MAX_ANISOTROPY_EXT: number;
-}
-
-interface Element extends Node, GlobalEventHandlers, ElementTraversal, NodeSelector, ChildNode, ParentNode {
-    readonly classList: DOMTokenList;
-    className: string;
-    readonly clientHeight: number;
-    readonly clientLeft: number;
-    readonly clientTop: number;
-    readonly clientWidth: number;
-    id: string;
-    msContentZoomFactor: number;
-    readonly msRegionOverflow: string;
-    onariarequest: (this: this, ev: AriaRequestEvent) => any;
-    oncommand: (this: this, ev: CommandEvent) => any;
-    ongotpointercapture: (this: this, ev: PointerEvent) => any;
-    onlostpointercapture: (this: this, ev: PointerEvent) => any;
-    onmsgesturechange: (this: this, ev: MSGestureEvent) => any;
-    onmsgesturedoubletap: (this: this, ev: MSGestureEvent) => any;
-    onmsgestureend: (this: this, ev: MSGestureEvent) => any;
-    onmsgesturehold: (this: this, ev: MSGestureEvent) => any;
-    onmsgesturestart: (this: this, ev: MSGestureEvent) => any;
-    onmsgesturetap: (this: this, ev: MSGestureEvent) => any;
-    onmsgotpointercapture: (this: this, ev: MSPointerEvent) => any;
-    onmsinertiastart: (this: this, ev: MSGestureEvent) => any;
-    onmslostpointercapture: (this: this, ev: MSPointerEvent) => any;
-    onmspointercancel: (this: this, ev: MSPointerEvent) => any;
-    onmspointerdown: (this: this, ev: MSPointerEvent) => any;
-    onmspointerenter: (this: this, ev: MSPointerEvent) => any;
-    onmspointerleave: (this: this, ev: MSPointerEvent) => any;
-    onmspointermove: (this: this, ev: MSPointerEvent) => any;
-    onmspointerout: (this: this, ev: MSPointerEvent) => any;
-    onmspointerover: (this: this, ev: MSPointerEvent) => any;
-    onmspointerup: (this: this, ev: MSPointerEvent) => any;
-    ontouchcancel: (ev: TouchEvent) => any;
-    ontouchend: (ev: TouchEvent) => any;
-    ontouchmove: (ev: TouchEvent) => any;
-    ontouchstart: (ev: TouchEvent) => any;
-    onwebkitfullscreenchange: (this: this, ev: Event) => any;
-    onwebkitfullscreenerror: (this: this, ev: Event) => any;
-    readonly prefix: string | null;
-    readonly scrollHeight: number;
-    scrollLeft: number;
-    scrollTop: number;
-    readonly scrollWidth: number;
-    readonly tagName: string;
-    innerHTML: string;
-    getAttribute(name: string): string | null;
-    getAttributeNS(namespaceURI: string, localName: string): string;
-    getAttributeNode(name: string): Attr;
-    getAttributeNodeNS(namespaceURI: string, localName: string): Attr;
-    getBoundingClientRect(): ClientRect;
-    getClientRects(): ClientRectList;
-    getElementsByTagName(name: "a"): NodeListOf<HTMLAnchorElement>;
-    getElementsByTagName(name: "abbr"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "acronym"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "address"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "applet"): NodeListOf<HTMLAppletElement>;
-    getElementsByTagName(name: "area"): NodeListOf<HTMLAreaElement>;
-    getElementsByTagName(name: "article"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "aside"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "audio"): NodeListOf<HTMLAudioElement>;
-    getElementsByTagName(name: "b"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "base"): NodeListOf<HTMLBaseElement>;
-    getElementsByTagName(name: "basefont"): NodeListOf<HTMLBaseFontElement>;
-    getElementsByTagName(name: "bdo"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "big"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "blockquote"): NodeListOf<HTMLQuoteElement>;
-    getElementsByTagName(name: "body"): NodeListOf<HTMLBodyElement>;
-    getElementsByTagName(name: "br"): NodeListOf<HTMLBRElement>;
-    getElementsByTagName(name: "button"): NodeListOf<HTMLButtonElement>;
-    getElementsByTagName(name: "canvas"): NodeListOf<HTMLCanvasElement>;
-    getElementsByTagName(name: "caption"): NodeListOf<HTMLTableCaptionElement>;
-    getElementsByTagName(name: "center"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "circle"): NodeListOf<SVGCircleElement>;
-    getElementsByTagName(name: "cite"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "clippath"): NodeListOf<SVGClipPathElement>;
-    getElementsByTagName(name: "code"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "col"): NodeListOf<HTMLTableColElement>;
-    getElementsByTagName(name: "colgroup"): NodeListOf<HTMLTableColElement>;
-    getElementsByTagName(name: "datalist"): NodeListOf<HTMLDataListElement>;
-    getElementsByTagName(name: "dd"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "defs"): NodeListOf<SVGDefsElement>;
-    getElementsByTagName(name: "del"): NodeListOf<HTMLModElement>;
-    getElementsByTagName(name: "desc"): NodeListOf<SVGDescElement>;
-    getElementsByTagName(name: "dfn"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "dir"): NodeListOf<HTMLDirectoryElement>;
-    getElementsByTagName(name: "div"): NodeListOf<HTMLDivElement>;
-    getElementsByTagName(name: "dl"): NodeListOf<HTMLDListElement>;
-    getElementsByTagName(name: "dt"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "ellipse"): NodeListOf<SVGEllipseElement>;
-    getElementsByTagName(name: "em"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "embed"): NodeListOf<HTMLEmbedElement>;
-    getElementsByTagName(name: "feblend"): NodeListOf<SVGFEBlendElement>;
-    getElementsByTagName(name: "fecolormatrix"): NodeListOf<SVGFEColorMatrixElement>;
-    getElementsByTagName(name: "fecomponenttransfer"): NodeListOf<SVGFEComponentTransferElement>;
-    getElementsByTagName(name: "fecomposite"): NodeListOf<SVGFECompositeElement>;
-    getElementsByTagName(name: "feconvolvematrix"): NodeListOf<SVGFEConvolveMatrixElement>;
-    getElementsByTagName(name: "fediffuselighting"): NodeListOf<SVGFEDiffuseLightingElement>;
-    getElementsByTagName(name: "fedisplacementmap"): NodeListOf<SVGFEDisplacementMapElement>;
-    getElementsByTagName(name: "fedistantlight"): NodeListOf<SVGFEDistantLightElement>;
-    getElementsByTagName(name: "feflood"): NodeListOf<SVGFEFloodElement>;
-    getElementsByTagName(name: "fefunca"): NodeListOf<SVGFEFuncAElement>;
-    getElementsByTagName(name: "fefuncb"): NodeListOf<SVGFEFuncBElement>;
-    getElementsByTagName(name: "fefuncg"): NodeListOf<SVGFEFuncGElement>;
-    getElementsByTagName(name: "fefuncr"): NodeListOf<SVGFEFuncRElement>;
-    getElementsByTagName(name: "fegaussianblur"): NodeListOf<SVGFEGaussianBlurElement>;
-    getElementsByTagName(name: "feimage"): NodeListOf<SVGFEImageElement>;
-    getElementsByTagName(name: "femerge"): NodeListOf<SVGFEMergeElement>;
-    getElementsByTagName(name: "femergenode"): NodeListOf<SVGFEMergeNodeElement>;
-    getElementsByTagName(name: "femorphology"): NodeListOf<SVGFEMorphologyElement>;
-    getElementsByTagName(name: "feoffset"): NodeListOf<SVGFEOffsetElement>;
-    getElementsByTagName(name: "fepointlight"): NodeListOf<SVGFEPointLightElement>;
-    getElementsByTagName(name: "fespecularlighting"): NodeListOf<SVGFESpecularLightingElement>;
-    getElementsByTagName(name: "fespotlight"): NodeListOf<SVGFESpotLightElement>;
-    getElementsByTagName(name: "fetile"): NodeListOf<SVGFETileElement>;
-    getElementsByTagName(name: "feturbulence"): NodeListOf<SVGFETurbulenceElement>;
-    getElementsByTagName(name: "fieldset"): NodeListOf<HTMLFieldSetElement>;
-    getElementsByTagName(name: "figcaption"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "figure"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "filter"): NodeListOf<SVGFilterElement>;
-    getElementsByTagName(name: "font"): NodeListOf<HTMLFontElement>;
-    getElementsByTagName(name: "footer"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "foreignobject"): NodeListOf<SVGForeignObjectElement>;
-    getElementsByTagName(name: "form"): NodeListOf<HTMLFormElement>;
-    getElementsByTagName(name: "frame"): NodeListOf<HTMLFrameElement>;
-    getElementsByTagName(name: "frameset"): NodeListOf<HTMLFrameSetElement>;
-    getElementsByTagName(name: "g"): NodeListOf<SVGGElement>;
-    getElementsByTagName(name: "h1"): NodeListOf<HTMLHeadingElement>;
-    getElementsByTagName(name: "h2"): NodeListOf<HTMLHeadingElement>;
-    getElementsByTagName(name: "h3"): NodeListOf<HTMLHeadingElement>;
-    getElementsByTagName(name: "h4"): NodeListOf<HTMLHeadingElement>;
-    getElementsByTagName(name: "h5"): NodeListOf<HTMLHeadingElement>;
-    getElementsByTagName(name: "h6"): NodeListOf<HTMLHeadingElement>;
-    getElementsByTagName(name: "head"): NodeListOf<HTMLHeadElement>;
-    getElementsByTagName(name: "header"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "hgroup"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "hr"): NodeListOf<HTMLHRElement>;
-    getElementsByTagName(name: "html"): NodeListOf<HTMLHtmlElement>;
-    getElementsByTagName(name: "i"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "iframe"): NodeListOf<HTMLIFrameElement>;
-    getElementsByTagName(name: "image"): NodeListOf<SVGImageElement>;
-    getElementsByTagName(name: "img"): NodeListOf<HTMLImageElement>;
-    getElementsByTagName(name: "input"): NodeListOf<HTMLInputElement>;
-    getElementsByTagName(name: "ins"): NodeListOf<HTMLModElement>;
-    getElementsByTagName(name: "isindex"): NodeListOf<HTMLUnknownElement>;
-    getElementsByTagName(name: "kbd"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "keygen"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "label"): NodeListOf<HTMLLabelElement>;
-    getElementsByTagName(name: "legend"): NodeListOf<HTMLLegendElement>;
-    getElementsByTagName(name: "li"): NodeListOf<HTMLLIElement>;
-    getElementsByTagName(name: "line"): NodeListOf<SVGLineElement>;
-    getElementsByTagName(name: "lineargradient"): NodeListOf<SVGLinearGradientElement>;
-    getElementsByTagName(name: "link"): NodeListOf<HTMLLinkElement>;
-    getElementsByTagName(name: "listing"): NodeListOf<HTMLPreElement>;
-    getElementsByTagName(name: "map"): NodeListOf<HTMLMapElement>;
-    getElementsByTagName(name: "mark"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "marker"): NodeListOf<SVGMarkerElement>;
-    getElementsByTagName(name: "marquee"): NodeListOf<HTMLMarqueeElement>;
-    getElementsByTagName(name: "mask"): NodeListOf<SVGMaskElement>;
-    getElementsByTagName(name: "menu"): NodeListOf<HTMLMenuElement>;
-    getElementsByTagName(name: "meta"): NodeListOf<HTMLMetaElement>;
-    getElementsByTagName(name: "metadata"): NodeListOf<SVGMetadataElement>;
-    getElementsByTagName(name: "meter"): NodeListOf<HTMLMeterElement>;
-    getElementsByTagName(name: "nav"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "nextid"): NodeListOf<HTMLUnknownElement>;
-    getElementsByTagName(name: "nobr"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "noframes"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "noscript"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "object"): NodeListOf<HTMLObjectElement>;
-    getElementsByTagName(name: "ol"): NodeListOf<HTMLOListElement>;
-    getElementsByTagName(name: "optgroup"): NodeListOf<HTMLOptGroupElement>;
-    getElementsByTagName(name: "option"): NodeListOf<HTMLOptionElement>;
-    getElementsByTagName(name: "p"): NodeListOf<HTMLParagraphElement>;
-    getElementsByTagName(name: "param"): NodeListOf<HTMLParamElement>;
-    getElementsByTagName(name: "path"): NodeListOf<SVGPathElement>;
-    getElementsByTagName(name: "pattern"): NodeListOf<SVGPatternElement>;
-    getElementsByTagName(name: "picture"): NodeListOf<HTMLPictureElement>;
-    getElementsByTagName(name: "plaintext"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "polygon"): NodeListOf<SVGPolygonElement>;
-    getElementsByTagName(name: "polyline"): NodeListOf<SVGPolylineElement>;
-    getElementsByTagName(name: "pre"): NodeListOf<HTMLPreElement>;
-    getElementsByTagName(name: "progress"): NodeListOf<HTMLProgressElement>;
-    getElementsByTagName(name: "q"): NodeListOf<HTMLQuoteElement>;
-    getElementsByTagName(name: "radialgradient"): NodeListOf<SVGRadialGradientElement>;
-    getElementsByTagName(name: "rect"): NodeListOf<SVGRectElement>;
-    getElementsByTagName(name: "rt"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "ruby"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "s"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "samp"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "script"): NodeListOf<HTMLScriptElement>;
-    getElementsByTagName(name: "section"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "select"): NodeListOf<HTMLSelectElement>;
-    getElementsByTagName(name: "small"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "source"): NodeListOf<HTMLSourceElement>;
-    getElementsByTagName(name: "span"): NodeListOf<HTMLSpanElement>;
-    getElementsByTagName(name: "stop"): NodeListOf<SVGStopElement>;
-    getElementsByTagName(name: "strike"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "strong"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "style"): NodeListOf<HTMLStyleElement>;
-    getElementsByTagName(name: "sub"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "sup"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "svg"): NodeListOf<SVGSVGElement>;
-    getElementsByTagName(name: "switch"): NodeListOf<SVGSwitchElement>;
-    getElementsByTagName(name: "symbol"): NodeListOf<SVGSymbolElement>;
-    getElementsByTagName(name: "table"): NodeListOf<HTMLTableElement>;
-    getElementsByTagName(name: "tbody"): NodeListOf<HTMLTableSectionElement>;
-    getElementsByTagName(name: "td"): NodeListOf<HTMLTableDataCellElement>;
-    getElementsByTagName(name: "template"): NodeListOf<HTMLTemplateElement>;
-    getElementsByTagName(name: "text"): NodeListOf<SVGTextElement>;
-    getElementsByTagName(name: "textpath"): NodeListOf<SVGTextPathElement>;
-    getElementsByTagName(name: "textarea"): NodeListOf<HTMLTextAreaElement>;
-    getElementsByTagName(name: "tfoot"): NodeListOf<HTMLTableSectionElement>;
-    getElementsByTagName(name: "th"): NodeListOf<HTMLTableHeaderCellElement>;
-    getElementsByTagName(name: "thead"): NodeListOf<HTMLTableSectionElement>;
-    getElementsByTagName(name: "title"): NodeListOf<HTMLTitleElement>;
-    getElementsByTagName(name: "tr"): NodeListOf<HTMLTableRowElement>;
-    getElementsByTagName(name: "track"): NodeListOf<HTMLTrackElement>;
-    getElementsByTagName(name: "tspan"): NodeListOf<SVGTSpanElement>;
-    getElementsByTagName(name: "tt"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "u"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "ul"): NodeListOf<HTMLUListElement>;
-    getElementsByTagName(name: "use"): NodeListOf<SVGUseElement>;
-    getElementsByTagName(name: "var"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "video"): NodeListOf<HTMLVideoElement>;
-    getElementsByTagName(name: "view"): NodeListOf<SVGViewElement>;
-    getElementsByTagName(name: "wbr"): NodeListOf<HTMLElement>;
-    getElementsByTagName(name: "x-ms-webview"): NodeListOf<MSHTMLWebViewElement>;
-    getElementsByTagName(name: "xmp"): NodeListOf<HTMLPreElement>;
-    getElementsByTagName(name: string): NodeListOf<Element>;
-    getElementsByTagNameNS(namespaceURI: "http://www.w3.org/1999/xhtml", localName: string): HTMLCollectionOf<HTMLElement>;
-    getElementsByTagNameNS(namespaceURI: "http://www.w3.org/2000/svg", localName: string): HTMLCollectionOf<SVGElement>;
-    getElementsByTagNameNS(namespaceURI: string, localName: string): HTMLCollectionOf<Element>;
-    hasAttribute(name: string): boolean;
-    hasAttributeNS(namespaceURI: string, localName: string): boolean;
-    msGetRegionContent(): MSRangeCollection;
-    msGetUntransformedBounds(): ClientRect;
-    msMatchesSelector(selectors: string): boolean;
-    msReleasePointerCapture(pointerId: number): void;
-    msSetPointerCapture(pointerId: number): void;
-    msZoomTo(args: MsZoomToOptions): void;
-    releasePointerCapture(pointerId: number): void;
-    removeAttribute(name?: string): void;
-    removeAttributeNS(namespaceURI: string, localName: string): void;
-    removeAttributeNode(oldAttr: Attr): Attr;
-    requestFullscreen(): void;
-    requestPointerLock(): void;
-    setAttribute(name: string, value: string): void;
-    setAttributeNS(namespaceURI: string, qualifiedName: string, value: string): void;
-    setAttributeNode(newAttr: Attr): Attr;
-    setAttributeNodeNS(newAttr: Attr): Attr;
-    setPointerCapture(pointerId: number): void;
-    webkitMatchesSelector(selectors: string): boolean;
-    webkitRequestFullScreen(): void;
-    webkitRequestFullscreen(): void;
-    getElementsByClassName(classNames: string): NodeListOf<Element>;
-    matches(selector: string): boolean;
-    closest(selector: string): Element | null;
-    scrollIntoView(arg?: boolean | ScrollIntoViewOptions): void;
-    scroll(options?: ScrollToOptions): void;
-    scroll(x: number, y: number): void;
-    scrollTo(options?: ScrollToOptions): void;
-    scrollTo(x: number, y: number): void;
-    scrollBy(options?: ScrollToOptions): void;
-    scrollBy(x: number, y: number): void;
-    insertAdjacentElement(position: string, insertedElement: Element): Element | null;
-    insertAdjacentHTML(where: string, html: string): void;
-    insertAdjacentText(where: string, text: string): void;
-    addEventListener(type: "MSGestureChange", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureDoubleTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureEnd", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureHold", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGotPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSInertiaStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSLostPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerCancel", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerDown", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerEnter", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerLeave", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerMove", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOut", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOver", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerUp", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ariarequest", listener: (this: this, ev: AriaRequestEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "command", listener: (this: this, ev: CommandEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "gotpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "lostpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointercancel", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerdown", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerenter", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerleave", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointermove", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerout", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerover", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerup", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchcancel", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchend", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchmove", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchstart", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenerror", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "wheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var Element: {
-    prototype: Element;
-    new(): Element;
-}
-
-interface ErrorEvent extends Event {
-    readonly colno: number;
-    readonly error: any;
-    readonly filename: string;
-    readonly lineno: number;
-    readonly message: string;
-    initErrorEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, messageArg: string, filenameArg: string, linenoArg: number): void;
-}
-
-declare var ErrorEvent: {
-    prototype: ErrorEvent;
-    new(): ErrorEvent;
-}
-
-interface Event {
-    readonly bubbles: boolean;
-    cancelBubble: boolean;
-    readonly cancelable: boolean;
-    readonly currentTarget: EventTarget;
-    readonly defaultPrevented: boolean;
-    readonly eventPhase: number;
-    readonly isTrusted: boolean;
-    returnValue: boolean;
-    readonly srcElement: Element | null;
-    readonly target: EventTarget;
-    readonly timeStamp: number;
-    readonly type: string;
-    initEvent(eventTypeArg: string, canBubbleArg: boolean, cancelableArg: boolean): void;
-    preventDefault(): void;
-    stopImmediatePropagation(): void;
-    stopPropagation(): void;
-    readonly AT_TARGET: number;
-    readonly BUBBLING_PHASE: number;
-    readonly CAPTURING_PHASE: number;
-}
-
-declare var Event: {
-    prototype: Event;
-    new(type: string, eventInitDict?: EventInit): Event;
-    readonly AT_TARGET: number;
-    readonly BUBBLING_PHASE: number;
-    readonly CAPTURING_PHASE: number;
-}
-
-interface EventTarget {
-    addEventListener(type: string, listener?: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-    dispatchEvent(evt: Event): boolean;
-    removeEventListener(type: string, listener?: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var EventTarget: {
-    prototype: EventTarget;
-    new(): EventTarget;
-}
-
-interface External {
-}
-
-declare var External: {
-    prototype: External;
-    new(): External;
-}
-
-interface File extends Blob {
-    readonly lastModifiedDate: any;
-    readonly name: string;
-    readonly webkitRelativePath: string;
-}
-
-declare var File: {
-    prototype: File;
-    new (parts: (ArrayBuffer | ArrayBufferView | Blob | string)[], filename: string, properties?: FilePropertyBag): File;
-}
-
-interface FileList {
-    readonly length: number;
-    item(index: number): File;
-    [index: number]: File;
-}
-
-declare var FileList: {
-    prototype: FileList;
-    new(): FileList;
-}
-
-interface FileReader extends EventTarget, MSBaseReader {
-    readonly error: DOMError;
-    readAsArrayBuffer(blob: Blob): void;
-    readAsBinaryString(blob: Blob): void;
-    readAsDataURL(blob: Blob): void;
-    readAsText(blob: Blob, encoding?: string): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var FileReader: {
-    prototype: FileReader;
-    new(): FileReader;
-}
-
-interface FocusEvent extends UIEvent {
-    readonly relatedTarget: EventTarget;
-    initFocusEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, relatedTargetArg: EventTarget): void;
-}
-
-declare var FocusEvent: {
-    prototype: FocusEvent;
-    new(typeArg: string, eventInitDict?: FocusEventInit): FocusEvent;
-}
-
-interface FormData {
-    append(name: any, value: any, blobName?: string): void;
-}
-
-declare var FormData: {
-    prototype: FormData;
-    new (form?: HTMLFormElement): FormData;
-}
-
-interface GainNode extends AudioNode {
-    readonly gain: AudioParam;
-}
-
-declare var GainNode: {
-    prototype: GainNode;
-    new(): GainNode;
-}
-
-interface Gamepad {
-    readonly axes: number[];
-    readonly buttons: GamepadButton[];
-    readonly connected: boolean;
-    readonly id: string;
-    readonly index: number;
-    readonly mapping: string;
-    readonly timestamp: number;
-}
-
-declare var Gamepad: {
-    prototype: Gamepad;
-    new(): Gamepad;
-}
-
-interface GamepadButton {
-    readonly pressed: boolean;
-    readonly value: number;
-}
-
-declare var GamepadButton: {
-    prototype: GamepadButton;
-    new(): GamepadButton;
-}
-
-interface GamepadEvent extends Event {
-    readonly gamepad: Gamepad;
-}
-
-declare var GamepadEvent: {
-    prototype: GamepadEvent;
-    new(): GamepadEvent;
-}
-
-interface Geolocation {
-    clearWatch(watchId: number): void;
-    getCurrentPosition(successCallback: PositionCallback, errorCallback?: PositionErrorCallback, options?: PositionOptions): void;
-    watchPosition(successCallback: PositionCallback, errorCallback?: PositionErrorCallback, options?: PositionOptions): number;
-}
-
-declare var Geolocation: {
-    prototype: Geolocation;
-    new(): Geolocation;
-}
-
-interface HTMLAllCollection extends HTMLCollection {
-    namedItem(name: string): Element;
-}
-
-declare var HTMLAllCollection: {
-    prototype: HTMLAllCollection;
-    new(): HTMLAllCollection;
-}
-
-interface HTMLAnchorElement extends HTMLElement {
-    Methods: string;
-    /**
-      * Sets or retrieves the character set used to encode the object.
-      */
-    charset: string;
-    /**
-      * Sets or retrieves the coordinates of the object.
-      */
-    coords: string;
-    download: string;
-    /**
-      * Contains the anchor portion of the URL including the hash sign (#).
-      */
-    hash: string;
-    /**
-      * Contains the hostname and port values of the URL.
-      */
-    host: string;
-    /**
-      * Contains the hostname of a URL.
-      */
-    hostname: string;
-    /**
-      * Sets or retrieves a destination URL or an anchor point.
-      */
-    href: string;
-    /**
-      * Sets or retrieves the language code of the object.
-      */
-    hreflang: string;
-    readonly mimeType: string;
-    /**
-      * Sets or retrieves the shape of the object.
-      */
-    name: string;
-    readonly nameProp: string;
-    /**
-      * Contains the pathname of the URL.
-      */
-    pathname: string;
-    /**
-      * Sets or retrieves the port number associated with a URL.
-      */
-    port: string;
-    /**
-      * Contains the protocol of the URL.
-      */
-    protocol: string;
-    readonly protocolLong: string;
-    /**
-      * Sets or retrieves the relationship between the object and the destination of the link.
-      */
-    rel: string;
-    /**
-      * Sets or retrieves the relationship between the object and the destination of the link.
-      */
-    rev: string;
-    /**
-      * Sets or retrieves the substring of the href property that follows the question mark.
-      */
-    search: string;
-    /**
-      * Sets or retrieves the shape of the object.
-      */
-    shape: string;
-    /**
-      * Sets or retrieves the window or frame at which to target content.
-      */
-    target: string;
-    /**
-      * Retrieves or sets the text of the object as a string. 
-      */
-    text: string;
-    type: string;
-    urn: string;
-    /** 
-      * Returns a string representation of an object.
-      */
-    toString(): string;
-}
-
-declare var HTMLAnchorElement: {
-    prototype: HTMLAnchorElement;
-    new(): HTMLAnchorElement;
-}
-
-interface HTMLAppletElement extends HTMLElement {
-    /**
-      * Retrieves a string of the URL where the object tag can be found. This is often the href of the document that the object is in, or the value set by a base element.
-      */
-    readonly BaseHref: string;
-    align: string;
-    /**
-      * Sets or retrieves a text alternative to the graphic.
-      */
-    alt: string;
-    /**
-      * Gets or sets the optional alternative HTML script to execute if the object fails to load.
-      */
-    altHtml: string;
-    /**
-      * Sets or retrieves a character string that can be used to implement your own archive functionality for the object.
-      */
-    archive: string;
-    border: string;
-    code: string;
-    /**
-      * Sets or retrieves the URL of the component.
-      */
-    codeBase: string;
-    /**
-      * Sets or retrieves the Internet media type for the code associated with the object.
-      */
-    codeType: string;
-    /**
-      * Address of a pointer to the document this page or frame contains. If there is no document, then null will be returned.
-      */
-    readonly contentDocument: Document;
-    /**
-      * Sets or retrieves the URL that references the data of the object.
-      */
-    data: string;
-    /**
-      * Sets or retrieves a character string that can be used to implement your own declare functionality for the object.
-      */
-    declare: boolean;
-    readonly form: HTMLFormElement;
-    /**
-      * Sets or retrieves the height of the object.
-      */
-    height: string;
-    hspace: number;
-    /**
-      * Sets or retrieves the shape of the object.
-      */
-    name: string;
-    object: string | null;
-    /**
-      * Sets or retrieves a message to be displayed while an object is loading.
-      */
-    standby: string;
-    /**
-      * Returns the content type of the object.
-      */
-    type: string;
-    /**
-      * Sets or retrieves the URL, often with a bookmark extension (#name), to use as a client-side image map.
-      */
-    useMap: string;
-    vspace: number;
-    width: number;
-}
-
-declare var HTMLAppletElement: {
-    prototype: HTMLAppletElement;
-    new(): HTMLAppletElement;
-}
-
-interface HTMLAreaElement extends HTMLElement {
-    /**
-      * Sets or retrieves a text alternative to the graphic.
-      */
-    alt: string;
-    /**
-      * Sets or retrieves the coordinates of the object.
-      */
-    coords: string;
-    download: string;
-    /**
-      * Sets or retrieves the subsection of the href property that follows the number sign (#).
-      */
-    hash: string;
-    /**
-      * Sets or retrieves the hostname and port number of the location or URL.
-      */
-    host: string;
-    /**
-      * Sets or retrieves the host name part of the location or URL. 
-      */
-    hostname: string;
-    /**
-      * Sets or retrieves a destination URL or an anchor point.
-      */
-    href: string;
-    /**
-      * Sets or gets whether clicks in this region cause action.
-      */
-    noHref: boolean;
-    /**
-      * Sets or retrieves the file name or path specified by the object.
-      */
-    pathname: string;
-    /**
-      * Sets or retrieves the port number associated with a URL.
-      */
-    port: string;
-    /**
-      * Sets or retrieves the protocol portion of a URL.
-      */
-    protocol: string;
-    rel: string;
-    /**
-      * Sets or retrieves the substring of the href property that follows the question mark.
-      */
-    search: string;
-    /**
-      * Sets or retrieves the shape of the object.
-      */
-    shape: string;
-    /**
-      * Sets or retrieves the window or frame at which to target content.
-      */
-    target: string;
-    /** 
-      * Returns a string representation of an object.
-      */
-    toString(): string;
-}
-
-declare var HTMLAreaElement: {
-    prototype: HTMLAreaElement;
-    new(): HTMLAreaElement;
-}
-
-interface HTMLAreasCollection extends HTMLCollection {
-    /**
-      * Adds an element to the areas, controlRange, or options collection.
-      */
-    add(element: HTMLElement, before?: HTMLElement | number): void;
-    /**
-      * Removes an element from the collection.
-      */
-    remove(index?: number): void;
-}
-
-declare var HTMLAreasCollection: {
-    prototype: HTMLAreasCollection;
-    new(): HTMLAreasCollection;
-}
-
-interface HTMLAudioElement extends HTMLMediaElement {
-}
-
-declare var HTMLAudioElement: {
-    prototype: HTMLAudioElement;
-    new(): HTMLAudioElement;
-}
-
-interface HTMLBRElement extends HTMLElement {
-    /**
-      * Sets or retrieves the side on which floating objects are not to be positioned when any IHTMLBlockElement is inserted into the document.
-      */
-    clear: string;
-}
-
-declare var HTMLBRElement: {
-    prototype: HTMLBRElement;
-    new(): HTMLBRElement;
-}
-
-interface HTMLBaseElement extends HTMLElement {
-    /**
-      * Gets or sets the baseline URL on which relative links are based.
-      */
-    href: string;
-    /**
-      * Sets or retrieves the window or frame at which to target content.
-      */
-    target: string;
-}
-
-declare var HTMLBaseElement: {
-    prototype: HTMLBaseElement;
-    new(): HTMLBaseElement;
-}
-
-interface HTMLBaseFontElement extends HTMLElement, DOML2DeprecatedColorProperty {
-    /**
-      * Sets or retrieves the current typeface family.
-      */
-    face: string;
-    /**
-      * Sets or retrieves the font size of the object.
-      */
-    size: number;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLBaseFontElement: {
-    prototype: HTMLBaseFontElement;
-    new(): HTMLBaseFontElement;
-}
-
-interface HTMLBodyElement extends HTMLElement {
-    aLink: any;
-    background: string;
-    bgColor: any;
-    bgProperties: string;
-    link: any;
-    noWrap: boolean;
-    onafterprint: (this: this, ev: Event) => any;
-    onbeforeprint: (this: this, ev: Event) => any;
-    onbeforeunload: (this: this, ev: BeforeUnloadEvent) => any;
-    onblur: (this: this, ev: FocusEvent) => any;
-    onerror: (this: this, ev: ErrorEvent) => any;
-    onfocus: (this: this, ev: FocusEvent) => any;
-    onhashchange: (this: this, ev: HashChangeEvent) => any;
-    onload: (this: this, ev: Event) => any;
-    onmessage: (this: this, ev: MessageEvent) => any;
-    onoffline: (this: this, ev: Event) => any;
-    ononline: (this: this, ev: Event) => any;
-    onorientationchange: (this: this, ev: Event) => any;
-    onpagehide: (this: this, ev: PageTransitionEvent) => any;
-    onpageshow: (this: this, ev: PageTransitionEvent) => any;
-    onpopstate: (this: this, ev: PopStateEvent) => any;
-    onresize: (this: this, ev: UIEvent) => any;
-    onstorage: (this: this, ev: StorageEvent) => any;
-    onunload: (this: this, ev: Event) => any;
-    text: any;
-    vLink: any;
-    addEventListener(type: "MSContentZoom", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureChange", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureDoubleTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureEnd", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureHold", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGotPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSInertiaStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSLostPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSManipulationStateChanged", listener: (this: this, ev: MSManipulationEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerCancel", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerDown", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerEnter", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerLeave", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerMove", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOut", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOver", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerUp", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "abort", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "activate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "afterprint", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "ariarequest", listener: (this: this, ev: AriaRequestEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforecopy", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforecut", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforedeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforepaste", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforeprint", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforeunload", listener: (this: this, ev: BeforeUnloadEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "blur", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "blur", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplay", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplaythrough", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "change", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "click", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "command", listener: (this: this, ev: CommandEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "contextmenu", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "copy", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "cuechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "cut", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dblclick", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "deactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drag", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragend", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragenter", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragleave", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragover", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragstart", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drop", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "durationchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "emptied", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "ended", listener: (this: this, ev: MediaStreamErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "focus", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "focus", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "gotpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "hashchange", listener: (this: this, ev: HashChangeEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "input", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "invalid", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "keydown", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keypress", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keyup", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadeddata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadedmetadata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "lostpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "message", listener: (this: this, ev: MessageEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousedown", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseenter", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseleave", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousemove", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseout", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseover", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseup", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousewheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "offline", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "online", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "orientationchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "pagehide", listener: (this: this, ev: PageTransitionEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pageshow", listener: (this: this, ev: PageTransitionEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "paste", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pause", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "play", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "playing", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointercancel", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerdown", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerenter", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerleave", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointermove", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerout", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerover", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerup", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "popstate", listener: (this: this, ev: PopStateEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "progress", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ratechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "reset", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "resize", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "scroll", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeked", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeking", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "select", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "selectstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "stalled", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "storage", listener: (this: this, ev: StorageEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "submit", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "suspend", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "timeupdate", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchcancel", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchend", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchmove", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchstart", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "unload", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "volumechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "waiting", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenerror", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "wheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLBodyElement: {
-    prototype: HTMLBodyElement;
-    new(): HTMLBodyElement;
-}
-
-interface HTMLButtonElement extends HTMLElement {
-    /**
-      * Provides a way to direct a user to a specific field when a document loads. This can provide both direction and convenience for a user, reducing the need to click or tab to a field when a page opens. This attribute is true when present on an element, and false when missing.
-      */
-    autofocus: boolean;
-    disabled: boolean;
-    /**
-      * Retrieves a reference to the form that the object is embedded in.
-      */
-    readonly form: HTMLFormElement;
-    /**
-      * Overrides the action attribute (where the data on a form is sent) on the parent form element.
-      */
-    formAction: string;
-    /**
-      * Used to override the encoding (formEnctype attribute) specified on the form element.
-      */
-    formEnctype: string;
-    /**
-      * Overrides the submit method attribute previously specified on a form element.
-      */
-    formMethod: string;
-    /**
-      * Overrides any validation or required attributes on a form or form elements to allow it to be submitted without validation. This can be used to create a "save draft"-type submit option.
-      */
-    formNoValidate: string;
-    /**
-      * Overrides the target attribute on a form element.
-      */
-    formTarget: string;
-    /** 
-      * Sets or retrieves the name of the object.
-      */
-    name: string;
-    status: any;
-    /**
-      * Gets the classification and default behavior of the button.
-      */
-    type: string;
-    /**
-      * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
-      */
-    readonly validationMessage: string;
-    /**
-      * Returns a  ValidityState object that represents the validity states of an element.
-      */
-    readonly validity: ValidityState;
-    /** 
-      * Sets or retrieves the default or selected value of the control.
-      */
-    value: string;
-    /**
-      * Returns whether an element will successfully validate based on forms validation rules and constraints.
-      */
-    readonly willValidate: boolean;
-    /**
-      * Returns whether a form will validate when it is submitted, without having to submit it.
-      */
-    checkValidity(): boolean;
-    /**
-      * Sets a custom error message that is displayed when a form is submitted.
-      * @param error Sets a custom error message that is displayed when a form is submitted.
-      */
-    setCustomValidity(error: string): void;
-}
-
-declare var HTMLButtonElement: {
-    prototype: HTMLButtonElement;
-    new(): HTMLButtonElement;
-}
-
-interface HTMLCanvasElement extends HTMLElement {
-    /**
-      * Gets or sets the height of a canvas element on a document.
-      */
-    height: number;
-    /**
-      * Gets or sets the width of a canvas element on a document.
-      */
-    width: number;
-    /**
-      * Returns an object that provides methods and properties for drawing and manipulating images and graphics on a canvas element in a document. A context object includes information about colors, line widths, fonts, and other graphic parameters that can be drawn on a canvas.
-      * @param contextId The identifier (ID) of the type of canvas to create. Internet Explorer 9 and Internet Explorer 10 support only a 2-D context using canvas.getContext("2d"); IE11 Preview also supports 3-D or WebGL context using canvas.getContext("experimental-webgl");
-      */
-    getContext(contextId: "2d", contextAttributes?: Canvas2DContextAttributes): CanvasRenderingContext2D | null;
-    getContext(contextId: "webgl" | "experimental-webgl", contextAttributes?: WebGLContextAttributes): WebGLRenderingContext | null;
-    getContext(contextId: string, contextAttributes?: {}): CanvasRenderingContext2D | WebGLRenderingContext | null;
-    /**
-      * Returns a blob object encoded as a Portable Network Graphics (PNG) format from a canvas image or drawing.
-      */
-    msToBlob(): Blob;
-    /**
-      * Returns the content of the current canvas as an image that you can use as a source for another canvas or an HTML element.
-      * @param type The standard MIME type for the image format to return. If you do not specify this parameter, the default value is a PNG format image.
-      */
-    toDataURL(type?: string, ...args: any[]): string;
-    toBlob(callback: (result: Blob | null) => void, type?: string, ...arguments: any[]): void;
-}
-
-declare var HTMLCanvasElement: {
-    prototype: HTMLCanvasElement;
-    new(): HTMLCanvasElement;
-}
-
-interface HTMLCollection {
-    /**
-      * Sets or retrieves the number of objects in a collection.
-      */
-    readonly length: number;
-    /**
-      * Retrieves an object from various collections.
-      */
-    item(index: number): Element;
-    /**
-      * Retrieves a select object or an object from an options collection.
-      */
-    namedItem(name: string): Element;
-    [index: number]: Element;
-}
-
-declare var HTMLCollection: {
-    prototype: HTMLCollection;
-    new(): HTMLCollection;
-}
-
-interface HTMLDListElement extends HTMLElement {
-    compact: boolean;
-}
-
-declare var HTMLDListElement: {
-    prototype: HTMLDListElement;
-    new(): HTMLDListElement;
-}
-
-interface HTMLDataListElement extends HTMLElement {
-    options: HTMLCollectionOf<HTMLOptionElement>;
-}
-
-declare var HTMLDataListElement: {
-    prototype: HTMLDataListElement;
-    new(): HTMLDataListElement;
-}
-
-interface HTMLDirectoryElement extends HTMLElement {
-    compact: boolean;
-}
-
-declare var HTMLDirectoryElement: {
-    prototype: HTMLDirectoryElement;
-    new(): HTMLDirectoryElement;
-}
-
-interface HTMLDivElement extends HTMLElement {
-    /**
-      * Sets or retrieves how the object is aligned with adjacent text. 
-      */
-    align: string;
-    /**
-      * Sets or retrieves whether the browser automatically performs wordwrap.
-      */
-    noWrap: boolean;
-}
-
-declare var HTMLDivElement: {
-    prototype: HTMLDivElement;
-    new(): HTMLDivElement;
-}
-
-interface HTMLDocument extends Document {
-}
-
-declare var HTMLDocument: {
-    prototype: HTMLDocument;
-    new(): HTMLDocument;
-}
-
-interface HTMLElement extends Element {
-    accessKey: string;
-    readonly children: HTMLCollection;
-    contentEditable: string;
-    readonly dataset: DOMStringMap;
-    dir: string;
-    draggable: boolean;
-    hidden: boolean;
-    hideFocus: boolean;
-    innerHTML: string;
-    innerText: string;
-    readonly isContentEditable: boolean;
-    lang: string;
-    readonly offsetHeight: number;
-    readonly offsetLeft: number;
-    readonly offsetParent: Element;
-    readonly offsetTop: number;
-    readonly offsetWidth: number;
-    onabort: (this: this, ev: UIEvent) => any;
-    onactivate: (this: this, ev: UIEvent) => any;
-    onbeforeactivate: (this: this, ev: UIEvent) => any;
-    onbeforecopy: (this: this, ev: ClipboardEvent) => any;
-    onbeforecut: (this: this, ev: ClipboardEvent) => any;
-    onbeforedeactivate: (this: this, ev: UIEvent) => any;
-    onbeforepaste: (this: this, ev: ClipboardEvent) => any;
-    onblur: (this: this, ev: FocusEvent) => any;
-    oncanplay: (this: this, ev: Event) => any;
-    oncanplaythrough: (this: this, ev: Event) => any;
-    onchange: (this: this, ev: Event) => any;
-    onclick: (this: this, ev: MouseEvent) => any;
-    oncontextmenu: (this: this, ev: PointerEvent) => any;
-    oncopy: (this: this, ev: ClipboardEvent) => any;
-    oncuechange: (this: this, ev: Event) => any;
-    oncut: (this: this, ev: ClipboardEvent) => any;
-    ondblclick: (this: this, ev: MouseEvent) => any;
-    ondeactivate: (this: this, ev: UIEvent) => any;
-    ondrag: (this: this, ev: DragEvent) => any;
-    ondragend: (this: this, ev: DragEvent) => any;
-    ondragenter: (this: this, ev: DragEvent) => any;
-    ondragleave: (this: this, ev: DragEvent) => any;
-    ondragover: (this: this, ev: DragEvent) => any;
-    ondragstart: (this: this, ev: DragEvent) => any;
-    ondrop: (this: this, ev: DragEvent) => any;
-    ondurationchange: (this: this, ev: Event) => any;
-    onemptied: (this: this, ev: Event) => any;
-    onended: (this: this, ev: MediaStreamErrorEvent) => any;
-    onerror: (this: this, ev: ErrorEvent) => any;
-    onfocus: (this: this, ev: FocusEvent) => any;
-    oninput: (this: this, ev: Event) => any;
-    oninvalid: (this: this, ev: Event) => any;
-    onkeydown: (this: this, ev: KeyboardEvent) => any;
-    onkeypress: (this: this, ev: KeyboardEvent) => any;
-    onkeyup: (this: this, ev: KeyboardEvent) => any;
-    onload: (this: this, ev: Event) => any;
-    onloadeddata: (this: this, ev: Event) => any;
-    onloadedmetadata: (this: this, ev: Event) => any;
-    onloadstart: (this: this, ev: Event) => any;
-    onmousedown: (this: this, ev: MouseEvent) => any;
-    onmouseenter: (this: this, ev: MouseEvent) => any;
-    onmouseleave: (this: this, ev: MouseEvent) => any;
-    onmousemove: (this: this, ev: MouseEvent) => any;
-    onmouseout: (this: this, ev: MouseEvent) => any;
-    onmouseover: (this: this, ev: MouseEvent) => any;
-    onmouseup: (this: this, ev: MouseEvent) => any;
-    onmousewheel: (this: this, ev: WheelEvent) => any;
-    onmscontentzoom: (this: this, ev: UIEvent) => any;
-    onmsmanipulationstatechanged: (this: this, ev: MSManipulationEvent) => any;
-    onpaste: (this: this, ev: ClipboardEvent) => any;
-    onpause: (this: this, ev: Event) => any;
-    onplay: (this: this, ev: Event) => any;
-    onplaying: (this: this, ev: Event) => any;
-    onprogress: (this: this, ev: ProgressEvent) => any;
-    onratechange: (this: this, ev: Event) => any;
-    onreset: (this: this, ev: Event) => any;
-    onscroll: (this: this, ev: UIEvent) => any;
-    onseeked: (this: this, ev: Event) => any;
-    onseeking: (this: this, ev: Event) => any;
-    onselect: (this: this, ev: UIEvent) => any;
-    onselectstart: (this: this, ev: Event) => any;
-    onstalled: (this: this, ev: Event) => any;
-    onsubmit: (this: this, ev: Event) => any;
-    onsuspend: (this: this, ev: Event) => any;
-    ontimeupdate: (this: this, ev: Event) => any;
-    onvolumechange: (this: this, ev: Event) => any;
-    onwaiting: (this: this, ev: Event) => any;
-    outerHTML: string;
-    outerText: string;
-    spellcheck: boolean;
-    readonly style: CSSStyleDeclaration;
-    tabIndex: number;
-    title: string;
-    blur(): void;
-    click(): void;
-    dragDrop(): boolean;
-    focus(): void;
-    msGetInputContext(): MSInputMethodContext;
-    setActive(): void;
-    addEventListener(type: "MSContentZoom", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureChange", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureDoubleTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureEnd", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureHold", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGotPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSInertiaStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSLostPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSManipulationStateChanged", listener: (this: this, ev: MSManipulationEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerCancel", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerDown", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerEnter", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerLeave", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerMove", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOut", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOver", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerUp", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "abort", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "activate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ariarequest", listener: (this: this, ev: AriaRequestEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforecopy", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforecut", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforedeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforepaste", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "blur", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplay", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplaythrough", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "change", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "click", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "command", listener: (this: this, ev: CommandEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "contextmenu", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "copy", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "cuechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "cut", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dblclick", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "deactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drag", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragend", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragenter", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragleave", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragover", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragstart", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drop", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "durationchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "emptied", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "ended", listener: (this: this, ev: MediaStreamErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "focus", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "gotpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "input", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "invalid", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "keydown", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keypress", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keyup", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadeddata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadedmetadata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "lostpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousedown", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseenter", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseleave", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousemove", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseout", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseover", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseup", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousewheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "paste", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pause", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "play", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "playing", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointercancel", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerdown", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerenter", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerleave", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointermove", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerout", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerover", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerup", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "progress", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ratechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "reset", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "scroll", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeked", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeking", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "select", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "selectstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "stalled", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "submit", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "suspend", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "timeupdate", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchcancel", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchend", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchmove", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchstart", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "volumechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "waiting", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenerror", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "wheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLElement: {
-    prototype: HTMLElement;
-    new(): HTMLElement;
-}
-
-interface HTMLEmbedElement extends HTMLElement, GetSVGDocument {
-    /**
-      * Sets or retrieves the height of the object.
-      */
-    height: string;
-    hidden: any;
-    /**
-      * Gets or sets whether the DLNA PlayTo device is available.
-      */
-    msPlayToDisabled: boolean;
-    /**
-      * Gets or sets the path to the preferred media source. This enables the Play To target device to stream the media content, which can be DRM protected, from a different location, such as a cloud media server.
-      */
-    msPlayToPreferredSourceUri: string;
-    /**
-      * Gets or sets the primary DLNA PlayTo device.
-      */
-    msPlayToPrimary: boolean;
-    /**
-      * Gets the source associated with the media element for use by the PlayToManager.
-      */
-    readonly msPlayToSource: any;
-    /**
-      * Sets or retrieves the name of the object.
-      */
-    name: string;
-    /**
-      * Retrieves the palette used for the embedded document.
-      */
-    readonly palette: string;
-    /**
-      * Retrieves the URL of the plug-in used to view an embedded document.
-      */
-    readonly pluginspage: string;
-    readonly readyState: string;
-    /**
-      * Sets or retrieves a URL to be loaded by the object.
-      */
-    src: string;
-    /**
-      * Sets or retrieves the height and width units of the embed object.
-      */
-    units: string;
-    /**
-      * Sets or retrieves the width of the object.
-      */
-    width: string;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLEmbedElement: {
-    prototype: HTMLEmbedElement;
-    new(): HTMLEmbedElement;
-}
-
-interface HTMLFieldSetElement extends HTMLElement {
-    /**
-      * Sets or retrieves how the object is aligned with adjacent text.
-      */
-    align: string;
-    disabled: boolean;
-    /**
-      * Retrieves a reference to the form that the object is embedded in.
-      */
-    readonly form: HTMLFormElement;
-    /**
-      * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
-      */
-    readonly validationMessage: string;
-    /**
-      * Returns a  ValidityState object that represents the validity states of an element.
-      */
-    readonly validity: ValidityState;
-    /**
-      * Returns whether an element will successfully validate based on forms validation rules and constraints.
-      */
-    readonly willValidate: boolean;
-    /**
-      * Returns whether a form will validate when it is submitted, without having to submit it.
-      */
-    checkValidity(): boolean;
-    /**
-      * Sets a custom error message that is displayed when a form is submitted.
-      * @param error Sets a custom error message that is displayed when a form is submitted.
-      */
-    setCustomValidity(error: string): void;
-}
-
-declare var HTMLFieldSetElement: {
-    prototype: HTMLFieldSetElement;
-    new(): HTMLFieldSetElement;
-}
-
-interface HTMLFontElement extends HTMLElement, DOML2DeprecatedColorProperty, DOML2DeprecatedSizeProperty {
-    /**
-      * Sets or retrieves the current typeface family.
-      */
-    face: string;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLFontElement: {
-    prototype: HTMLFontElement;
-    new(): HTMLFontElement;
-}
-
-interface HTMLFormElement extends HTMLElement {
-    /**
-      * Sets or retrieves a list of character encodings for input data that must be accepted by the server processing the form.
-      */
-    acceptCharset: string;
-    /**
-      * Sets or retrieves the URL to which the form content is sent for processing.
-      */
-    action: string;
-    /**
-      * Specifies whether autocomplete is applied to an editable text field.
-      */
-    autocomplete: string;
-    /**
-      * Retrieves a collection, in source order, of all controls in a given form.
-      */
-    readonly elements: HTMLCollection;
-    /**
-      * Sets or retrieves the MIME encoding for the form.
-      */
-    encoding: string;
-    /**
-      * Sets or retrieves the encoding type for the form.
-      */
-    enctype: string;
-    /**
-      * Sets or retrieves the number of objects in a collection.
-      */
-    readonly length: number;
-    /**
-      * Sets or retrieves how to send the form data to the server.
-      */
-    method: string;
-    /**
-      * Sets or retrieves the name of the object.
-      */
-    name: string;
-    /**
-      * Designates a form that is not validated when submitted.
-      */
-    noValidate: boolean;
-    /**
-      * Sets or retrieves the window or frame at which to target content.
-      */
-    target: string;
-    /**
-      * Returns whether a form will validate when it is submitted, without having to submit it.
-      */
-    checkValidity(): boolean;
-    /**
-      * Retrieves a form object or an object from an elements collection.
-      * @param name Variant of type Number or String that specifies the object or collection to retrieve. If this parameter is a Number, it is the zero-based index of the object. If this parameter is a string, all objects with matching name or id properties are retrieved, and a collection is returned if more than one match is made.
-      * @param index Variant of type Number that specifies the zero-based index of the object to retrieve when a collection is returned.
-      */
-    item(name?: any, index?: any): any;
-    /**
-      * Retrieves a form object or an object from an elements collection.
-      */
-    namedItem(name: string): any;
-    /**
-      * Fires when the user resets a form.
-      */
-    reset(): void;
-    /**
-      * Fires when a FORM is about to be submitted.
-      */
-    submit(): void;
-    [name: string]: any;
-}
-
-declare var HTMLFormElement: {
-    prototype: HTMLFormElement;
-    new(): HTMLFormElement;
-}
-
-interface HTMLFrameElement extends HTMLElement, GetSVGDocument {
-    /**
-      * Specifies the properties of a border drawn around an object.
-      */
-    border: string;
-    /**
-      * Sets or retrieves the border color of the object.
-      */
-    borderColor: any;
-    /**
-      * Retrieves the document object of the page or frame.
-      */
-    readonly contentDocument: Document;
-    /**
-      * Retrieves the object of the specified.
-      */
-    readonly contentWindow: Window;
-    /**
-      * Sets or retrieves whether to display a border for the frame.
-      */
-    frameBorder: string;
-    /**
-      * Sets or retrieves the amount of additional space between the frames.
-      */
-    frameSpacing: any;
-    /**
-      * Sets or retrieves the height of the object.
-      */
-    height: string | number;
-    /**
-      * Sets or retrieves a URI to a long description of the object.
-      */
-    longDesc: string;
-    /**
-      * Sets or retrieves the top and bottom margin heights before displaying the text in a frame.
-      */
-    marginHeight: string;
-    /**
-      * Sets or retrieves the left and right margin widths before displaying the text in a frame.
-      */
-    marginWidth: string;
-    /**
-      * Sets or retrieves the frame name.
-      */
-    name: string;
-    /**
-      * Sets or retrieves whether the user can resize the frame.
-      */
-    noResize: boolean;
-    /**
-      * Raised when the object has been completely received from the server.
-      */
-    onload: (this: this, ev: Event) => any;
-    /**
-      * Sets or retrieves whether the frame can be scrolled.
-      */
-    scrolling: string;
-    /**
-      * Sets or retrieves a URL to be loaded by the object.
-      */
-    src: string;
-    /**
-      * Sets or retrieves the width of the object.
-      */
-    width: string | number;
-    addEventListener(type: "MSContentZoom", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureChange", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureDoubleTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureEnd", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureHold", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGotPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSInertiaStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSLostPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSManipulationStateChanged", listener: (this: this, ev: MSManipulationEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerCancel", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerDown", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerEnter", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerLeave", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerMove", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOut", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOver", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerUp", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "abort", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "activate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ariarequest", listener: (this: this, ev: AriaRequestEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforecopy", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforecut", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforedeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforepaste", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "blur", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplay", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplaythrough", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "change", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "click", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "command", listener: (this: this, ev: CommandEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "contextmenu", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "copy", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "cuechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "cut", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dblclick", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "deactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drag", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragend", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragenter", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragleave", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragover", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragstart", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drop", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "durationchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "emptied", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "ended", listener: (this: this, ev: MediaStreamErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "focus", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "gotpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "input", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "invalid", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "keydown", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keypress", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keyup", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadeddata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadedmetadata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "lostpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousedown", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseenter", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseleave", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousemove", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseout", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseover", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseup", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousewheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "paste", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pause", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "play", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "playing", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointercancel", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerdown", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerenter", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerleave", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointermove", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerout", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerover", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerup", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "progress", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ratechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "reset", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "scroll", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeked", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeking", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "select", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "selectstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "stalled", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "submit", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "suspend", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "timeupdate", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchcancel", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchend", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchmove", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchstart", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "volumechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "waiting", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenerror", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "wheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLFrameElement: {
-    prototype: HTMLFrameElement;
-    new(): HTMLFrameElement;
-}
-
-interface HTMLFrameSetElement extends HTMLElement {
-    border: string;
-    /**
-      * Sets or retrieves the border color of the object.
-      */
-    borderColor: any;
-    /**
-      * Sets or retrieves the frame widths of the object.
-      */
-    cols: string;
-    /**
-      * Sets or retrieves whether to display a border for the frame.
-      */
-    frameBorder: string;
-    /**
-      * Sets or retrieves the amount of additional space between the frames.
-      */
-    frameSpacing: any;
-    name: string;
-    onafterprint: (this: this, ev: Event) => any;
-    onbeforeprint: (this: this, ev: Event) => any;
-    onbeforeunload: (this: this, ev: BeforeUnloadEvent) => any;
-    /**
-      * Fires when the object loses the input focus.
-      */
-    onblur: (this: this, ev: FocusEvent) => any;
-    onerror: (this: this, ev: ErrorEvent) => any;
-    /**
-      * Fires when the object receives focus.
-      */
-    onfocus: (this: this, ev: FocusEvent) => any;
-    onhashchange: (this: this, ev: HashChangeEvent) => any;
-    onload: (this: this, ev: Event) => any;
-    onmessage: (this: this, ev: MessageEvent) => any;
-    onoffline: (this: this, ev: Event) => any;
-    ononline: (this: this, ev: Event) => any;
-    onorientationchange: (this: this, ev: Event) => any;
-    onpagehide: (this: this, ev: PageTransitionEvent) => any;
-    onpageshow: (this: this, ev: PageTransitionEvent) => any;
-    onresize: (this: this, ev: UIEvent) => any;
-    onstorage: (this: this, ev: StorageEvent) => any;
-    onunload: (this: this, ev: Event) => any;
-    /**
-      * Sets or retrieves the frame heights of the object.
-      */
-    rows: string;
-    addEventListener(type: "MSContentZoom", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureChange", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureDoubleTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureEnd", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureHold", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGotPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSInertiaStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSLostPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSManipulationStateChanged", listener: (this: this, ev: MSManipulationEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerCancel", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerDown", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerEnter", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerLeave", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerMove", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOut", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOver", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerUp", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "abort", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "activate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ariarequest", listener: (this: this, ev: AriaRequestEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforecopy", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforecut", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforedeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforepaste", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforeprint", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforeunload", listener: (this: this, ev: BeforeUnloadEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "blur", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "blur", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplay", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplaythrough", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "change", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "click", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "command", listener: (this: this, ev: CommandEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "contextmenu", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "copy", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "cuechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "cut", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dblclick", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "deactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drag", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragend", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragenter", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragleave", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragover", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragstart", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drop", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "durationchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "emptied", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "ended", listener: (this: this, ev: MediaStreamErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "focus", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "focus", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "gotpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "hashchange", listener: (this: this, ev: HashChangeEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "input", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "invalid", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "keydown", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keypress", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keyup", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadeddata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadedmetadata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "lostpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "message", listener: (this: this, ev: MessageEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousedown", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseenter", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseleave", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousemove", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseout", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseover", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseup", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousewheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "offline", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "online", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "orientationchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "pagehide", listener: (this: this, ev: PageTransitionEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pageshow", listener: (this: this, ev: PageTransitionEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "paste", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pause", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "play", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "playing", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointercancel", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerdown", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerenter", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerleave", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointermove", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerout", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerover", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerup", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "progress", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ratechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "reset", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "resize", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "scroll", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeked", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeking", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "select", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "selectstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "stalled", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "storage", listener: (this: this, ev: StorageEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "submit", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "suspend", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "timeupdate", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchcancel", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchend", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchmove", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchstart", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "unload", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "volumechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "waiting", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenerror", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "wheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLFrameSetElement: {
-    prototype: HTMLFrameSetElement;
-    new(): HTMLFrameSetElement;
-}
-
-interface HTMLHRElement extends HTMLElement, DOML2DeprecatedColorProperty, DOML2DeprecatedSizeProperty {
-    /**
-      * Sets or retrieves how the object is aligned with adjacent text.
-      */
-    align: string;
-    /**
-      * Sets or retrieves whether the horizontal rule is drawn with 3-D shading.
-      */
-    noShade: boolean;
-    /**
-      * Sets or retrieves the width of the object.
-      */
-    width: number;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLHRElement: {
-    prototype: HTMLHRElement;
-    new(): HTMLHRElement;
-}
-
-interface HTMLHeadElement extends HTMLElement {
-    profile: string;
-}
-
-declare var HTMLHeadElement: {
-    prototype: HTMLHeadElement;
-    new(): HTMLHeadElement;
-}
-
-interface HTMLHeadingElement extends HTMLElement {
-    /**
-      * Sets or retrieves a value that indicates the table alignment.
-      */
-    align: string;
-}
-
-declare var HTMLHeadingElement: {
-    prototype: HTMLHeadingElement;
-    new(): HTMLHeadingElement;
-}
-
-interface HTMLHtmlElement extends HTMLElement {
-    /**
-      * Sets or retrieves the DTD version that governs the current document.
-      */
-    version: string;
-}
-
-declare var HTMLHtmlElement: {
-    prototype: HTMLHtmlElement;
-    new(): HTMLHtmlElement;
-}
-
-interface HTMLIFrameElement extends HTMLElement, GetSVGDocument {
-    /**
-      * Sets or retrieves how the object is aligned with adjacent text.
-      */
-    align: string;
-    allowFullscreen: boolean;
-    /**
-      * Specifies the properties of a border drawn around an object.
-      */
-    border: string;
-    /**
-      * Retrieves the document object of the page or frame.
-      */
-    readonly contentDocument: Document;
-    /**
-      * Retrieves the object of the specified.
-      */
-    readonly contentWindow: Window;
-    /**
-      * Sets or retrieves whether to display a border for the frame.
-      */
-    frameBorder: string;
-    /**
-      * Sets or retrieves the amount of additional space between the frames.
-      */
-    frameSpacing: any;
-    /**
-      * Sets or retrieves the height of the object.
-      */
-    height: string;
-    /**
-      * Sets or retrieves the horizontal margin for the object.
-      */
-    hspace: number;
-    /**
-      * Sets or retrieves a URI to a long description of the object.
-      */
-    longDesc: string;
-    /**
-      * Sets or retrieves the top and bottom margin heights before displaying the text in a frame.
-      */
-    marginHeight: string;
-    /**
-      * Sets or retrieves the left and right margin widths before displaying the text in a frame.
-      */
-    marginWidth: string;
-    /**
-      * Sets or retrieves the frame name.
-      */
-    name: string;
-    /**
-      * Sets or retrieves whether the user can resize the frame.
-      */
-    noResize: boolean;
-    /**
-      * Raised when the object has been completely received from the server.
-      */
-    onload: (this: this, ev: Event) => any;
-    readonly sandbox: DOMSettableTokenList;
-    /**
-      * Sets or retrieves whether the frame can be scrolled.
-      */
-    scrolling: string;
-    /**
-      * Sets or retrieves a URL to be loaded by the object.
-      */
-    src: string;
-    /**
-      * Sets or retrieves the vertical margin for the object.
-      */
-    vspace: number;
-    /**
-      * Sets or retrieves the width of the object.
-      */
-    width: string;
-    addEventListener(type: "MSContentZoom", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureChange", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureDoubleTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureEnd", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureHold", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGotPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSInertiaStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSLostPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSManipulationStateChanged", listener: (this: this, ev: MSManipulationEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerCancel", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerDown", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerEnter", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerLeave", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerMove", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOut", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOver", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerUp", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "abort", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "activate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ariarequest", listener: (this: this, ev: AriaRequestEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforecopy", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforecut", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforedeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforepaste", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "blur", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplay", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplaythrough", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "change", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "click", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "command", listener: (this: this, ev: CommandEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "contextmenu", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "copy", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "cuechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "cut", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dblclick", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "deactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drag", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragend", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragenter", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragleave", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragover", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragstart", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drop", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "durationchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "emptied", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "ended", listener: (this: this, ev: MediaStreamErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "focus", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "gotpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "input", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "invalid", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "keydown", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keypress", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keyup", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadeddata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadedmetadata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "lostpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousedown", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseenter", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseleave", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousemove", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseout", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseover", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseup", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousewheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "paste", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pause", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "play", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "playing", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointercancel", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerdown", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerenter", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerleave", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointermove", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerout", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerover", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerup", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "progress", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ratechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "reset", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "scroll", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeked", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeking", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "select", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "selectstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "stalled", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "submit", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "suspend", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "timeupdate", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchcancel", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchend", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchmove", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchstart", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "volumechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "waiting", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenerror", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "wheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLIFrameElement: {
-    prototype: HTMLIFrameElement;
-    new(): HTMLIFrameElement;
-}
-
-interface HTMLImageElement extends HTMLElement {
-    /**
-      * Sets or retrieves how the object is aligned with adjacent text.
-      */
-    align: string;
-    /**
-      * Sets or retrieves a text alternative to the graphic.
-      */
-    alt: string;
-    /**
-      * Specifies the properties of a border drawn around an object.
-      */
-    border: string;
-    /**
-      * Retrieves whether the object is fully loaded.
-      */
-    readonly complete: boolean;
-    crossOrigin: string;
-    readonly currentSrc: string;
-    /**
-      * Sets or retrieves the height of the object.
-      */
-    height: number;
-    /**
-      * Sets or retrieves the width of the border to draw around the object.
-      */
-    hspace: number;
-    /**
-      * Sets or retrieves whether the image is a server-side image map.
-      */
-    isMap: boolean;
-    /**
-      * Sets or retrieves a Uniform Resource Identifier (URI) to a long description of the object.
-      */
-    longDesc: string;
-    lowsrc: string;
-    /**
-      * Gets or sets whether the DLNA PlayTo device is available.
-      */
-    msPlayToDisabled: boolean;
-    msPlayToPreferredSourceUri: string;
-    /**
-      * Gets or sets the primary DLNA PlayTo device.
-      */
-    msPlayToPrimary: boolean;
-    /**
-      * Gets the source associated with the media element for use by the PlayToManager.
-      */
-    readonly msPlayToSource: any;
-    /**
-      * Sets or retrieves the name of the object.
-      */
-    name: string;
-    /**
-      * The original height of the image resource before sizing.
-      */
-    readonly naturalHeight: number;
-    /**
-      * The original width of the image resource before sizing.
-      */
-    readonly naturalWidth: number;
-    sizes: string;
-    /**
-      * The address or URL of the a media resource that is to be considered.
-      */
-    src: string;
-    srcset: string;
-    /**
-      * Sets or retrieves the URL, often with a bookmark extension (#name), to use as a client-side image map.
-      */
-    useMap: string;
-    /**
-      * Sets or retrieves the vertical margin for the object.
-      */
-    vspace: number;
-    /**
-      * Sets or retrieves the width of the object.
-      */
-    width: number;
-    readonly x: number;
-    readonly y: number;
-    msGetAsCastingSource(): any;
-}
-
-declare var HTMLImageElement: {
-    prototype: HTMLImageElement;
-    new(): HTMLImageElement;
-    create(): HTMLImageElement;
-}
-
-interface HTMLInputElement extends HTMLElement {
-    /**
-      * Sets or retrieves a comma-separated list of content types.
-      */
-    accept: string;
-    /**
-      * Sets or retrieves how the object is aligned with adjacent text.
-      */
-    align: string;
-    /**
-      * Sets or retrieves a text alternative to the graphic.
-      */
-    alt: string;
-    /**
-      * Specifies whether autocomplete is applied to an editable text field.
-      */
-    autocomplete: string;
-    /**
-      * Provides a way to direct a user to a specific field when a document loads. This can provide both direction and convenience for a user, reducing the need to click or tab to a field when a page opens. This attribute is true when present on an element, and false when missing.
-      */
-    autofocus: boolean;
-    /**
-      * Sets or retrieves the width of the border to draw around the object.
-      */
-    border: string;
-    /**
-      * Sets or retrieves the state of the check box or radio button.
-      */
-    checked: boolean;
-    /**
-      * Retrieves whether the object is fully loaded.
-      */
-    readonly complete: boolean;
-    /**
-      * Sets or retrieves the state of the check box or radio button.
-      */
-    defaultChecked: boolean;
-    /**
-      * Sets or retrieves the initial contents of the object.
-      */
-    defaultValue: string;
-    disabled: boolean;
-    /**
-      * Returns a FileList object on a file type input object.
-      */
-    readonly files: FileList | null;
-    /**
-      * Retrieves a reference to the form that the object is embedded in. 
-      */
-    readonly form: HTMLFormElement;
-    /**
-      * Overrides the action attribute (where the data on a form is sent) on the parent form element.
-      */
-    formAction: string;
-    /**
-      * Used to override the encoding (formEnctype attribute) specified on the form element.
-      */
-    formEnctype: string;
-    /**
-      * Overrides the submit method attribute previously specified on a form element.
-      */
-    formMethod: string;
-    /**
-      * Overrides any validation or required attributes on a form or form elements to allow it to be submitted without validation. This can be used to create a "save draft"-type submit option.
-      */
-    formNoValidate: string;
-    /**
-      * Overrides the target attribute on a form element.
-      */
-    formTarget: string;
-    /**
-      * Sets or retrieves the height of the object.
-      */
-    height: string;
-    /**
-      * Sets or retrieves the width of the border to draw around the object.
-      */
-    hspace: number;
-    indeterminate: boolean;
-    /**
-      * Specifies the ID of a pre-defined datalist of options for an input element.
-      */
-    readonly list: HTMLElement;
-    /**
-      * Defines the maximum acceptable value for an input element with type="number".When used with the min and step attributes, lets you control the range and increment (such as only even numbers) that the user can enter into an input field.
-      */
-    max: string;
-    /**
-      * Sets or retrieves the maximum number of characters that the user can enter in a text control.
-      */
-    maxLength: number;
-    /**
-      * Defines the minimum acceptable value for an input element with type="number". When used with the max and step attributes, lets you control the range and increment (such as even numbers only) that the user can enter into an input field.
-      */
-    min: string;
-    /**
-      * Sets or retrieves the Boolean value indicating whether multiple items can be selected from a list.
-      */
-    multiple: boolean;
-    /**
-      * Sets or retrieves the name of the object.
-      */
-    name: string;
-    /**
-      * Gets or sets a string containing a regular expression that the user's input must match.
-      */
-    pattern: string;
-    /**
-      * Gets or sets a text string that is displayed in an input field as a hint or prompt to users as the format or type of information they need to enter.The text appears in an input field until the user puts focus on the field.
-      */
-    placeholder: string;
-    readOnly: boolean;
-    /**
-      * When present, marks an element that can't be submitted without a value.
-      */
-    required: boolean;
-    selectionDirection: string;
-    /**
-      * Gets or sets the end position or offset of a text selection.
-      */
-    selectionEnd: number;
-    /**
-      * Gets or sets the starting position or offset of a text selection.
-      */
-    selectionStart: number;
-    size: number;
-    /**
-      * The address or URL of the a media resource that is to be considered.
-      */
-    src: string;
-    status: boolean;
-    /**
-      * Defines an increment or jump between values that you want to allow the user to enter. When used with the max and min attributes, lets you control the range and increment (for example, allow only even numbers) that the user can enter into an input field.
-      */
-    step: string;
-    /**
-      * Returns the content type of the object.
-      */
-    type: string;
-    /**
-      * Sets or retrieves the URL, often with a bookmark extension (#name), to use as a client-side image map.
-      */
-    useMap: string;
-    /**
-      * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
-      */
-    readonly validationMessage: string;
-    /**
-      * Returns a  ValidityState object that represents the validity states of an element.
-      */
-    readonly validity: ValidityState;
-    /**
-      * Returns the value of the data at the cursor's current position.
-      */
-    value: string;
-    valueAsDate: Date;
-    /**
-      * Returns the input field value as a number.
-      */
-    valueAsNumber: number;
-    /**
-      * Sets or retrieves the vertical margin for the object.
-      */
-    vspace: number;
-    webkitdirectory: boolean;
-    /**
-      * Sets or retrieves the width of the object.
-      */
-    width: string;
-    /**
-      * Returns whether an element will successfully validate based on forms validation rules and constraints.
-      */
-    readonly willValidate: boolean;
-    minLength: number;
-    /**
-      * Returns whether a form will validate when it is submitted, without having to submit it.
-      */
-    checkValidity(): boolean;
-    /**
-      * Makes the selection equal to the current object.
-      */
-    select(): void;
-    /**
-      * Sets a custom error message that is displayed when a form is submitted.
-      * @param error Sets a custom error message that is displayed when a form is submitted.
-      */
-    setCustomValidity(error: string): void;
-    /**
-      * Sets the start and end positions of a selection in a text field.
-      * @param start The offset into the text field for the start of the selection.
-      * @param end The offset into the text field for the end of the selection.
-      */
-    setSelectionRange(start?: number, end?: number, direction?: string): void;
-    /**
-      * Decrements a range input control's value by the value given by the Step attribute. If the optional parameter is used, it will decrement the input control's step value multiplied by the parameter's value.
-      * @param n Value to decrement the value by.
-      */
-    stepDown(n?: number): void;
-    /**
-      * Increments a range input control's value by the value given by the Step attribute. If the optional parameter is used, will increment the input control's value by that value.
-      * @param n Value to increment the value by.
-      */
-    stepUp(n?: number): void;
-}
-
-declare var HTMLInputElement: {
-    prototype: HTMLInputElement;
-    new(): HTMLInputElement;
-}
-
-interface HTMLLIElement extends HTMLElement {
-    type: string;
-    /**
-      * Sets or retrieves the value of a list item.
-      */
-    value: number;
-}
-
-declare var HTMLLIElement: {
-    prototype: HTMLLIElement;
-    new(): HTMLLIElement;
-}
-
-interface HTMLLabelElement extends HTMLElement {
-    /**
-      * Retrieves a reference to the form that the object is embedded in.
-      */
-    readonly form: HTMLFormElement;
-    /**
-      * Sets or retrieves the object to which the given label object is assigned.
-      */
-    htmlFor: string;
-}
-
-declare var HTMLLabelElement: {
-    prototype: HTMLLabelElement;
-    new(): HTMLLabelElement;
-}
-
-interface HTMLLegendElement extends HTMLElement {
-    /**
-      * Retrieves a reference to the form that the object is embedded in.
-      */
-    align: string;
-    /**
-      * Retrieves a reference to the form that the object is embedded in.
-      */
-    readonly form: HTMLFormElement;
-}
-
-declare var HTMLLegendElement: {
-    prototype: HTMLLegendElement;
-    new(): HTMLLegendElement;
-}
-
-interface HTMLLinkElement extends HTMLElement, LinkStyle {
-    /**
-      * Sets or retrieves the character set used to encode the object.
-      */
-    charset: string;
-    disabled: boolean;
-    /**
-      * Sets or retrieves a destination URL or an anchor point.
-      */
-    href: string;
-    /**
-      * Sets or retrieves the language code of the object.
-      */
-    hreflang: string;
-    /**
-      * Sets or retrieves the media type.
-      */
-    media: string;
-    /**
-      * Sets or retrieves the relationship between the object and the destination of the link.
-      */
-    rel: string;
-    /**
-      * Sets or retrieves the relationship between the object and the destination of the link.
-      */
-    rev: string;
-    /**
-      * Sets or retrieves the window or frame at which to target content.
-      */
-    target: string;
-    /**
-      * Sets or retrieves the MIME type of the object.
-      */
-    type: string;
-    import?: Document;
-    integrity: string;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLLinkElement: {
-    prototype: HTMLLinkElement;
-    new(): HTMLLinkElement;
-}
-
-interface HTMLMapElement extends HTMLElement {
-    /**
-      * Retrieves a collection of the area objects defined for the given map object.
-      */
-    readonly areas: HTMLAreasCollection;
-    /**
-      * Sets or retrieves the name of the object.
-      */
-    name: string;
-}
-
-declare var HTMLMapElement: {
-    prototype: HTMLMapElement;
-    new(): HTMLMapElement;
-}
-
-interface HTMLMarqueeElement extends HTMLElement {
-    behavior: string;
-    bgColor: any;
-    direction: string;
-    height: string;
-    hspace: number;
-    loop: number;
-    onbounce: (this: this, ev: Event) => any;
-    onfinish: (this: this, ev: Event) => any;
-    onstart: (this: this, ev: Event) => any;
-    scrollAmount: number;
-    scrollDelay: number;
-    trueSpeed: boolean;
-    vspace: number;
-    width: string;
-    start(): void;
-    stop(): void;
-    addEventListener(type: "MSContentZoom", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureChange", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureDoubleTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureEnd", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureHold", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGotPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSInertiaStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSLostPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSManipulationStateChanged", listener: (this: this, ev: MSManipulationEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerCancel", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerDown", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerEnter", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerLeave", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerMove", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOut", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOver", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerUp", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "abort", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "activate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ariarequest", listener: (this: this, ev: AriaRequestEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforecopy", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforecut", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforedeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforepaste", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "blur", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "bounce", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplay", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplaythrough", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "change", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "click", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "command", listener: (this: this, ev: CommandEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "contextmenu", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "copy", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "cuechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "cut", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dblclick", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "deactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drag", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragend", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragenter", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragleave", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragover", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragstart", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drop", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "durationchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "emptied", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "ended", listener: (this: this, ev: MediaStreamErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "finish", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "focus", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "gotpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "input", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "invalid", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "keydown", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keypress", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keyup", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadeddata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadedmetadata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "lostpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousedown", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseenter", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseleave", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousemove", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseout", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseover", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseup", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousewheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "paste", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pause", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "play", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "playing", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointercancel", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerdown", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerenter", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerleave", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointermove", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerout", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerover", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerup", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "progress", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ratechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "reset", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "scroll", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeked", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeking", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "select", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "selectstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "stalled", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "start", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "submit", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "suspend", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "timeupdate", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchcancel", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchend", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchmove", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchstart", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "volumechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "waiting", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenerror", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "wheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLMarqueeElement: {
-    prototype: HTMLMarqueeElement;
-    new(): HTMLMarqueeElement;
-}
-
-interface HTMLMediaElement extends HTMLElement {
-    /**
-      * Returns an AudioTrackList object with the audio tracks for a given video element.
-      */
-    readonly audioTracks: AudioTrackList;
-    /**
-      * Gets or sets a value that indicates whether to start playing the media automatically.
-      */
-    autoplay: boolean;
-    /**
-      * Gets a collection of buffered time ranges.
-      */
-    readonly buffered: TimeRanges;
-    /**
-      * Gets or sets a flag that indicates whether the client provides a set of controls for the media (in case the developer does not include controls for the player).
-      */
-    controls: boolean;
-    crossOrigin: string;
-    /**
-      * Gets the address or URL of the current media resource that is selected by IHTMLMediaElement.
-      */
-    readonly currentSrc: string;
-    /**
-      * Gets or sets the current playback position, in seconds.
-      */
-    currentTime: number;
-    defaultMuted: boolean;
-    /**
-      * Gets or sets the default playback rate when the user is not using fast forward or reverse for a video or audio resource.
-      */
-    defaultPlaybackRate: number;
-    /**
-      * Returns the duration in seconds of the current media resource. A NaN value is returned if duration is not available, or Infinity if the media resource is streaming.
-      */
-    readonly duration: number;
-    /**
-      * Gets information about whether the playback has ended or not.
-      */
-    readonly ended: boolean;
-    /**
-      * Returns an object representing the current error state of the audio or video element.
-      */
-    readonly error: MediaError;
-    /**
-      * Gets or sets a flag to specify whether playback should restart after it completes.
-      */
-    loop: boolean;
-    readonly mediaKeys: MediaKeys | null;
-    /**
-      * Specifies the purpose of the audio or video media, such as background audio or alerts.
-      */
-    msAudioCategory: string;
-    /**
-      * Specifies the output device id that the audio will be sent to.
-      */
-    msAudioDeviceType: string;
-    readonly msGraphicsTrustStatus: MSGraphicsTrust;
-    /**
-      * Gets the MSMediaKeys object, which is used for decrypting media data, that is associated with this media element.
-      */
-    readonly msKeys: MSMediaKeys;
-    /**
-      * Gets or sets whether the DLNA PlayTo device is available.
-      */
-    msPlayToDisabled: boolean;
-    /**
-      * Gets or sets the path to the preferred media source. This enables the Play To target device to stream the media content, which can be DRM protected, from a different location, such as a cloud media server.
-      */
-    msPlayToPreferredSourceUri: string;
-    /**
-      * Gets or sets the primary DLNA PlayTo device.
-      */
-    msPlayToPrimary: boolean;
-    /**
-      * Gets the source associated with the media element for use by the PlayToManager.
-      */
-    readonly msPlayToSource: any;
-    /**
-      * Specifies whether or not to enable low-latency playback on the media element.
-      */
-    msRealTime: boolean;
-    /**
-      * Gets or sets a flag that indicates whether the audio (either audio or the audio track on video media) is muted.
-      */
-    muted: boolean;
-    /**
-      * Gets the current network activity for the element.
-      */
-    readonly networkState: number;
-    onencrypted: (this: this, ev: MediaEncryptedEvent) => any;
-    onmsneedkey: (this: this, ev: MSMediaKeyNeededEvent) => any;
-    /**
-      * Gets a flag that specifies whether playback is paused.
-      */
-    readonly paused: boolean;
-    /**
-      * Gets or sets the current rate of speed for the media resource to play. This speed is expressed as a multiple of the normal speed of the media resource.
-      */
-    playbackRate: number;
-    /**
-      * Gets TimeRanges for the current media resource that has been played.
-      */
-    readonly played: TimeRanges;
-    /**
-      * Gets or sets the current playback position, in seconds.
-      */
-    preload: string;
-    readyState: number;
-    /**
-      * Returns a TimeRanges object that represents the ranges of the current media resource that can be seeked.
-      */
-    readonly seekable: TimeRanges;
-    /**
-      * Gets a flag that indicates whether the the client is currently moving to a new playback position in the media resource.
-      */
-    readonly seeking: boolean;
-    /**
-      * The address or URL of the a media resource that is to be considered.
-      */
-    src: string;
-    srcObject: MediaStream | null;
-    readonly textTracks: TextTrackList;
-    readonly videoTracks: VideoTrackList;
-    /**
-      * Gets or sets the volume level for audio portions of the media element.
-      */
-    volume: number;
-    addTextTrack(kind: string, label?: string, language?: string): TextTrack;
-    /**
-      * Returns a string that specifies whether the client can play a given media resource type.
-      */
-    canPlayType(type: string): string;
-    /**
-      * Resets the audio or video object and loads a new media resource.
-      */
-    load(): void;
-    /**
-      * Clears all effects from the media pipeline.
-      */
-    msClearEffects(): void;
-    msGetAsCastingSource(): any;
-    /**
-      * Inserts the specified audio effect into media pipeline.
-      */
-    msInsertAudioEffect(activatableClassId: string, effectRequired: boolean, config?: any): void;
-    msSetMediaKeys(mediaKeys: MSMediaKeys): void;
-    /**
-      * Specifies the media protection manager for a given media pipeline.
-      */
-    msSetMediaProtectionManager(mediaProtectionManager?: any): void;
-    /**
-      * Pauses the current playback and sets paused to TRUE. This can be used to test whether the media is playing or paused. You can also use the pause or play events to tell whether the media is playing or not.
-      */
-    pause(): void;
-    /**
-      * Loads and starts playback of a media resource.
-      */
-    play(): void;
-    setMediaKeys(mediaKeys: MediaKeys | null): PromiseLike<void>;
-    readonly HAVE_CURRENT_DATA: number;
-    readonly HAVE_ENOUGH_DATA: number;
-    readonly HAVE_FUTURE_DATA: number;
-    readonly HAVE_METADATA: number;
-    readonly HAVE_NOTHING: number;
-    readonly NETWORK_EMPTY: number;
-    readonly NETWORK_IDLE: number;
-    readonly NETWORK_LOADING: number;
-    readonly NETWORK_NO_SOURCE: number;
-    addEventListener(type: "MSContentZoom", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureChange", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureDoubleTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureEnd", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureHold", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGotPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSInertiaStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSLostPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSManipulationStateChanged", listener: (this: this, ev: MSManipulationEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerCancel", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerDown", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerEnter", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerLeave", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerMove", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOut", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOver", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerUp", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "abort", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "activate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ariarequest", listener: (this: this, ev: AriaRequestEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforecopy", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforecut", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforedeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforepaste", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "blur", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplay", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplaythrough", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "change", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "click", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "command", listener: (this: this, ev: CommandEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "contextmenu", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "copy", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "cuechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "cut", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dblclick", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "deactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drag", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragend", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragenter", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragleave", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragover", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragstart", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drop", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "durationchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "emptied", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "encrypted", listener: (this: this, ev: MediaEncryptedEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ended", listener: (this: this, ev: MediaStreamErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "focus", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "gotpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "input", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "invalid", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "keydown", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keypress", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keyup", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadeddata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadedmetadata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "lostpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousedown", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseenter", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseleave", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousemove", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseout", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseover", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseup", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousewheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "msneedkey", listener: (this: this, ev: MSMediaKeyNeededEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "paste", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pause", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "play", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "playing", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointercancel", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerdown", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerenter", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerleave", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointermove", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerout", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerover", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerup", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "progress", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ratechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "reset", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "scroll", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeked", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeking", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "select", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "selectstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "stalled", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "submit", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "suspend", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "timeupdate", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchcancel", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchend", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchmove", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchstart", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "volumechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "waiting", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenerror", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "wheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLMediaElement: {
-    prototype: HTMLMediaElement;
-    new(): HTMLMediaElement;
-    readonly HAVE_CURRENT_DATA: number;
-    readonly HAVE_ENOUGH_DATA: number;
-    readonly HAVE_FUTURE_DATA: number;
-    readonly HAVE_METADATA: number;
-    readonly HAVE_NOTHING: number;
-    readonly NETWORK_EMPTY: number;
-    readonly NETWORK_IDLE: number;
-    readonly NETWORK_LOADING: number;
-    readonly NETWORK_NO_SOURCE: number;
-}
-
-interface HTMLMenuElement extends HTMLElement {
-    compact: boolean;
-    type: string;
-}
-
-declare var HTMLMenuElement: {
-    prototype: HTMLMenuElement;
-    new(): HTMLMenuElement;
-}
-
-interface HTMLMetaElement extends HTMLElement {
-    /**
-      * Sets or retrieves the character set used to encode the object.
-      */
-    charset: string;
-    /**
-      * Gets or sets meta-information to associate with httpEquiv or name.
-      */
-    content: string;
-    /**
-      * Gets or sets information used to bind the value of a content attribute of a meta element to an HTTP response header.
-      */
-    httpEquiv: string;
-    /**
-      * Sets or retrieves the value specified in the content attribute of the meta object.
-      */
-    name: string;
-    /**
-      * Sets or retrieves a scheme to be used in interpreting the value of a property specified for the object.
-      */
-    scheme: string;
-    /**
-      * Sets or retrieves the URL property that will be loaded after the specified time has elapsed. 
-      */
-    url: string;
-}
-
-declare var HTMLMetaElement: {
-    prototype: HTMLMetaElement;
-    new(): HTMLMetaElement;
-}
-
-interface HTMLMeterElement extends HTMLElement {
-    high: number;
-    low: number;
-    max: number;
-    min: number;
-    optimum: number;
-    value: number;
-}
-
-declare var HTMLMeterElement: {
-    prototype: HTMLMeterElement;
-    new(): HTMLMeterElement;
-}
-
-interface HTMLModElement extends HTMLElement {
-    /**
-      * Sets or retrieves reference information about the object.
-      */
-    cite: string;
-    /**
-      * Sets or retrieves the date and time of a modification to the object.
-      */
-    dateTime: string;
-}
-
-declare var HTMLModElement: {
-    prototype: HTMLModElement;
-    new(): HTMLModElement;
-}
-
-interface HTMLOListElement extends HTMLElement {
-    compact: boolean;
-    /**
-      * The starting number.
-      */
-    start: number;
-    type: string;
-}
-
-declare var HTMLOListElement: {
-    prototype: HTMLOListElement;
-    new(): HTMLOListElement;
-}
-
-interface HTMLObjectElement extends HTMLElement, GetSVGDocument {
-    /**
-      * Retrieves a string of the URL where the object tag can be found. This is often the href of the document that the object is in, or the value set by a base element.
-      */
-    readonly BaseHref: string;
-    align: string;
-    /**
-      * Sets or retrieves a text alternative to the graphic.
-      */
-    alt: string;
-    /**
-      * Gets or sets the optional alternative HTML script to execute if the object fails to load.
-      */
-    altHtml: string;
-    /**
-      * Sets or retrieves a character string that can be used to implement your own archive functionality for the object.
-      */
-    archive: string;
-    border: string;
-    /**
-      * Sets or retrieves the URL of the file containing the compiled Java class.
-      */
-    code: string;
-    /**
-      * Sets or retrieves the URL of the component.
-      */
-    codeBase: string;
-    /**
-      * Sets or retrieves the Internet media type for the code associated with the object.
-      */
-    codeType: string;
-    /**
-      * Retrieves the document object of the page or frame.
-      */
-    readonly contentDocument: Document;
-    /**
-      * Sets or retrieves the URL that references the data of the object.
-      */
-    data: string;
-    declare: boolean;
-    /**
-      * Retrieves a reference to the form that the object is embedded in.
-      */
-    readonly form: HTMLFormElement;
-    /**
-      * Sets or retrieves the height of the object.
-      */
-    height: string;
-    hspace: number;
-    /**
-      * Gets or sets whether the DLNA PlayTo device is available.
-      */
-    msPlayToDisabled: boolean;
-    /**
-      * Gets or sets the path to the preferred media source. This enables the Play To target device to stream the media content, which can be DRM protected, from a different location, such as a cloud media server.
-      */
-    msPlayToPreferredSourceUri: string;
-    /**
-      * Gets or sets the primary DLNA PlayTo device.
-      */
-    msPlayToPrimary: boolean;
-    /**
-      * Gets the source associated with the media element for use by the PlayToManager.
-      */
-    readonly msPlayToSource: any;
-    /**
-      * Sets or retrieves the name of the object.
-      */
-    name: string;
-    /**
-      * Retrieves the contained object.
-      */
-    readonly object: any;
-    readonly readyState: number;
-    /**
-      * Sets or retrieves a message to be displayed while an object is loading.
-      */
-    standby: string;
-    /**
-      * Sets or retrieves the MIME type of the object.
-      */
-    type: string;
-    /**
-      * Sets or retrieves the URL, often with a bookmark extension (#name), to use as a client-side image map.
-      */
-    useMap: string;
-    /**
-      * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
-      */
-    readonly validationMessage: string;
-    /**
-      * Returns a  ValidityState object that represents the validity states of an element.
-      */
-    readonly validity: ValidityState;
-    vspace: number;
-    /**
-      * Sets or retrieves the width of the object.
-      */
-    width: string;
-    /**
-      * Returns whether an element will successfully validate based on forms validation rules and constraints.
-      */
-    readonly willValidate: boolean;
-    /**
-      * Returns whether a form will validate when it is submitted, without having to submit it.
-      */
-    checkValidity(): boolean;
-    /**
-      * Sets a custom error message that is displayed when a form is submitted.
-      * @param error Sets a custom error message that is displayed when a form is submitted.
-      */
-    setCustomValidity(error: string): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLObjectElement: {
-    prototype: HTMLObjectElement;
-    new(): HTMLObjectElement;
-}
-
-interface HTMLOptGroupElement extends HTMLElement {
-    /**
-      * Sets or retrieves the status of an option.
-      */
-    defaultSelected: boolean;
-    disabled: boolean;
-    /**
-      * Retrieves a reference to the form that the object is embedded in.
-      */
-    readonly form: HTMLFormElement;
-    /**
-      * Sets or retrieves the ordinal position of an option in a list box.
-      */
-    readonly index: number;
-    /**
-      * Sets or retrieves a value that you can use to implement your own label functionality for the object.
-      */
-    label: string;
-    /**
-      * Sets or retrieves whether the option in the list box is the default item.
-      */
-    selected: boolean;
-    /**
-      * Sets or retrieves the text string specified by the option tag.
-      */
-    readonly text: string;
-    /**
-      * Sets or retrieves the value which is returned to the server when the form control is submitted.
-      */
-    value: string;
-}
-
-declare var HTMLOptGroupElement: {
-    prototype: HTMLOptGroupElement;
-    new(): HTMLOptGroupElement;
-}
-
-interface HTMLOptionElement extends HTMLElement {
-    /**
-      * Sets or retrieves the status of an option.
-      */
-    defaultSelected: boolean;
-    disabled: boolean;
-    /**
-      * Retrieves a reference to the form that the object is embedded in.
-      */
-    readonly form: HTMLFormElement;
-    /**
-      * Sets or retrieves the ordinal position of an option in a list box.
-      */
-    readonly index: number;
-    /**
-      * Sets or retrieves a value that you can use to implement your own label functionality for the object.
-      */
-    label: string;
-    /**
-      * Sets or retrieves whether the option in the list box is the default item.
-      */
-    selected: boolean;
-    /**
-      * Sets or retrieves the text string specified by the option tag.
-      */
-    text: string;
-    /**
-      * Sets or retrieves the value which is returned to the server when the form control is submitted.
-      */
-    value: string;
-}
-
-declare var HTMLOptionElement: {
-    prototype: HTMLOptionElement;
-    new(): HTMLOptionElement;
-    create(): HTMLOptionElement;
-}
-
-interface HTMLOptionsCollection extends HTMLCollectionOf<HTMLOptionElement> {
-    length: number;
-    selectedIndex: number;
-    add(element: HTMLOptionElement | HTMLOptGroupElement, before?: HTMLElement | number): void;
-    remove(index: number): void;
-}
-
-declare var HTMLOptionsCollection: {
-    prototype: HTMLOptionsCollection;
-    new(): HTMLOptionsCollection;
-}
-
-interface HTMLParagraphElement extends HTMLElement {
-    /**
-      * Sets or retrieves how the object is aligned with adjacent text. 
-      */
-    align: string;
-    clear: string;
-}
-
-declare var HTMLParagraphElement: {
-    prototype: HTMLParagraphElement;
-    new(): HTMLParagraphElement;
-}
-
-interface HTMLParamElement extends HTMLElement {
-    /**
-      * Sets or retrieves the name of an input parameter for an element.
-      */
-    name: string;
-    /**
-      * Sets or retrieves the content type of the resource designated by the value attribute.
-      */
-    type: string;
-    /**
-      * Sets or retrieves the value of an input parameter for an element.
-      */
-    value: string;
-    /**
-      * Sets or retrieves the data type of the value attribute.
-      */
-    valueType: string;
-}
-
-declare var HTMLParamElement: {
-    prototype: HTMLParamElement;
-    new(): HTMLParamElement;
-}
-
-interface HTMLPictureElement extends HTMLElement {
-}
-
-declare var HTMLPictureElement: {
-    prototype: HTMLPictureElement;
-    new(): HTMLPictureElement;
-}
-
-interface HTMLPreElement extends HTMLElement {
-    /**
-      * Sets or gets a value that you can use to implement your own width functionality for the object.
-      */
-    width: number;
-}
-
-declare var HTMLPreElement: {
-    prototype: HTMLPreElement;
-    new(): HTMLPreElement;
-}
-
-interface HTMLProgressElement extends HTMLElement {
-    /**
-      * Retrieves a reference to the form that the object is embedded in.
-      */
-    readonly form: HTMLFormElement;
-    /**
-      * Defines the maximum, or "done" value for a progress element.
-      */
-    max: number;
-    /**
-      * Returns the quotient of value/max when the value attribute is set (determinate progress bar), or -1 when the value attribute is missing (indeterminate progress bar).
-      */
-    readonly position: number;
-    /**
-      * Sets or gets the current value of a progress element. The value must be a non-negative number between 0 and the max value.
-      */
-    value: number;
-}
-
-declare var HTMLProgressElement: {
-    prototype: HTMLProgressElement;
-    new(): HTMLProgressElement;
-}
-
-interface HTMLQuoteElement extends HTMLElement {
-    /**
-      * Sets or retrieves reference information about the object.
-      */
-    cite: string;
-}
-
-declare var HTMLQuoteElement: {
-    prototype: HTMLQuoteElement;
-    new(): HTMLQuoteElement;
-}
-
-interface HTMLScriptElement extends HTMLElement {
-    async: boolean;
-    /**
-      * Sets or retrieves the character set used to encode the object.
-      */
-    charset: string;
-    /**
-      * Sets or retrieves the status of the script.
-      */
-    defer: boolean;
-    /**
-      * Sets or retrieves the event for which the script is written. 
-      */
-    event: string;
-    /** 
-      * Sets or retrieves the object that is bound to the event script.
-      */
-    htmlFor: string;
-    /**
-      * Retrieves the URL to an external file that contains the source code or data.
-      */
-    src: string;
-    /**
-      * Retrieves or sets the text of the object as a string. 
-      */
-    text: string;
-    /**
-      * Sets or retrieves the MIME type for the associated scripting engine.
-      */
-    type: string;
-    integrity: string;
-}
-
-declare var HTMLScriptElement: {
-    prototype: HTMLScriptElement;
-    new(): HTMLScriptElement;
-}
-
-interface HTMLSelectElement extends HTMLElement {
-    /**
-      * Provides a way to direct a user to a specific field when a document loads. This can provide both direction and convenience for a user, reducing the need to click or tab to a field when a page opens. This attribute is true when present on an element, and false when missing.
-      */
-    autofocus: boolean;
-    disabled: boolean;
-    /**
-      * Retrieves a reference to the form that the object is embedded in. 
-      */
-    readonly form: HTMLFormElement;
-    /**
-      * Sets or retrieves the number of objects in a collection.
-      */
-    length: number;
-    /**
-      * Sets or retrieves the Boolean value indicating whether multiple items can be selected from a list.
-      */
-    multiple: boolean;
-    /**
-      * Sets or retrieves the name of the object.
-      */
-    name: string;
-    readonly options: HTMLOptionsCollection;
-    /**
-      * When present, marks an element that can't be submitted without a value.
-      */
-    required: boolean;
-    /**
-      * Sets or retrieves the index of the selected option in a select object.
-      */
-    selectedIndex: number;
-    selectedOptions: HTMLCollectionOf<HTMLOptionElement>;
-    /**
-      * Sets or retrieves the number of rows in the list box. 
-      */
-    size: number;
-    /**
-      * Retrieves the type of select control based on the value of the MULTIPLE attribute.
-      */
-    readonly type: string;
-    /**
-      * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
-      */
-    readonly validationMessage: string;
-    /**
-      * Returns a  ValidityState object that represents the validity states of an element.
-      */
-    readonly validity: ValidityState;
-    /**
-      * Sets or retrieves the value which is returned to the server when the form control is submitted.
-      */
-    value: string;
-    /**
-      * Returns whether an element will successfully validate based on forms validation rules and constraints.
-      */
-    readonly willValidate: boolean;
-    /**
-      * Adds an element to the areas, controlRange, or options collection.
-      * @param element Variant of type Number that specifies the index position in the collection where the element is placed. If no value is given, the method places the element at the end of the collection.
-      * @param before Variant of type Object that specifies an element to insert before, or null to append the object to the collection. 
-      */
-    add(element: HTMLElement, before?: HTMLElement | number): void;
-    /**
-      * Returns whether a form will validate when it is submitted, without having to submit it.
-      */
-    checkValidity(): boolean;
-    /**
-      * Retrieves a select object or an object from an options collection.
-      * @param name Variant of type Number or String that specifies the object or collection to retrieve. If this parameter is an integer, it is the zero-based index of the object. If this parameter is a string, all objects with matching name or id properties are retrieved, and a collection is returned if more than one match is made.
-      * @param index Variant of type Number that specifies the zero-based index of the object to retrieve when a collection is returned.
-      */
-    item(name?: any, index?: any): any;
-    /**
-      * Retrieves a select object or an object from an options collection.
-      * @param namedItem A String that specifies the name or id property of the object to retrieve. A collection is returned if more than one match is made.
-      */
-    namedItem(name: string): any;
-    /**
-      * Removes an element from the collection.
-      * @param index Number that specifies the zero-based index of the element to remove from the collection.
-      */
-    remove(index?: number): void;
-    /**
-      * Sets a custom error message that is displayed when a form is submitted.
-      * @param error Sets a custom error message that is displayed when a form is submitted.
-      */
-    setCustomValidity(error: string): void;
-    [name: string]: any;
-}
-
-declare var HTMLSelectElement: {
-    prototype: HTMLSelectElement;
-    new(): HTMLSelectElement;
-}
-
-interface HTMLSourceElement extends HTMLElement {
-    /**
-      * Gets or sets the intended media type of the media source.
-     */
-    media: string;
-    msKeySystem: string;
-    sizes: string;
-    /**
-      * The address or URL of the a media resource that is to be considered.
-      */
-    src: string;
-    srcset: string;
-    /**
-     * Gets or sets the MIME type of a media resource.
-     */
-    type: string;
-}
-
-declare var HTMLSourceElement: {
-    prototype: HTMLSourceElement;
-    new(): HTMLSourceElement;
-}
-
-interface HTMLSpanElement extends HTMLElement {
-}
-
-declare var HTMLSpanElement: {
-    prototype: HTMLSpanElement;
-    new(): HTMLSpanElement;
-}
-
-interface HTMLStyleElement extends HTMLElement, LinkStyle {
-    disabled: boolean;
-    /**
-      * Sets or retrieves the media type.
-      */
-    media: string;
-    /**
-      * Retrieves the CSS language in which the style sheet is written.
-      */
-    type: string;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLStyleElement: {
-    prototype: HTMLStyleElement;
-    new(): HTMLStyleElement;
-}
-
-interface HTMLTableCaptionElement extends HTMLElement {
-    /**
-      * Sets or retrieves the alignment of the caption or legend.
-      */
-    align: string;
-    /**
-      * Sets or retrieves whether the caption appears at the top or bottom of the table.
-      */
-    vAlign: string;
-}
-
-declare var HTMLTableCaptionElement: {
-    prototype: HTMLTableCaptionElement;
-    new(): HTMLTableCaptionElement;
-}
-
-interface HTMLTableCellElement extends HTMLElement, HTMLTableAlignment {
-    /**
-      * Sets or retrieves abbreviated text for the object.
-      */
-    abbr: string;
-    /**
-      * Sets or retrieves how the object is aligned with adjacent text.
-      */
-    align: string;
-    /**
-      * Sets or retrieves a comma-delimited list of conceptual categories associated with the object.
-      */
-    axis: string;
-    bgColor: any;
-    /**
-      * Retrieves the position of the object in the cells collection of a row.
-      */
-    readonly cellIndex: number;
-    /**
-      * Sets or retrieves the number columns in the table that the object should span.
-      */
-    colSpan: number;
-    /**
-      * Sets or retrieves a list of header cells that provide information for the object.
-      */
-    headers: string;
-    /**
-      * Sets or retrieves the height of the object.
-      */
-    height: any;
-    /**
-      * Sets or retrieves whether the browser automatically performs wordwrap.
-      */
-    noWrap: boolean;
-    /**
-      * Sets or retrieves how many rows in a table the cell should span.
-      */
-    rowSpan: number;
-    /**
-      * Sets or retrieves the group of cells in a table to which the object's information applies.
-      */
-    scope: string;
-    /**
-      * Sets or retrieves the width of the object.
-      */
-    width: string;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLTableCellElement: {
-    prototype: HTMLTableCellElement;
-    new(): HTMLTableCellElement;
-}
-
-interface HTMLTableColElement extends HTMLElement, HTMLTableAlignment {
-    /**
-      * Sets or retrieves the alignment of the object relative to the display or table.
-      */
-    align: string;
-    /**
-      * Sets or retrieves the number of columns in the group.
-      */
-    span: number;
-    /**
-      * Sets or retrieves the width of the object.
-      */
-    width: any;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLTableColElement: {
-    prototype: HTMLTableColElement;
-    new(): HTMLTableColElement;
-}
-
-interface HTMLTableDataCellElement extends HTMLTableCellElement {
-}
-
-declare var HTMLTableDataCellElement: {
-    prototype: HTMLTableDataCellElement;
-    new(): HTMLTableDataCellElement;
-}
-
-interface HTMLTableElement extends HTMLElement {
-    /**
-      * Sets or retrieves a value that indicates the table alignment.
-      */
-    align: string;
-    bgColor: any;
-    /**
-      * Sets or retrieves the width of the border to draw around the object.
-      */
-    border: string;
-    /**
-      * Sets or retrieves the border color of the object. 
-      */
-    borderColor: any;
-    /**
-      * Retrieves the caption object of a table.
-      */
-    caption: HTMLTableCaptionElement;
-    /**
-      * Sets or retrieves the amount of space between the border of the cell and the content of the cell.
-      */
-    cellPadding: string;
-    /**
-      * Sets or retrieves the amount of space between cells in a table.
-      */
-    cellSpacing: string;
-    /**
-      * Sets or retrieves the number of columns in the table.
-      */
-    cols: number;
-    /**
-      * Sets or retrieves the way the border frame around the table is displayed.
-      */
-    frame: string;
-    /**
-      * Sets or retrieves the height of the object.
-      */
-    height: any;
-    /**
-      * Sets or retrieves the number of horizontal rows contained in the object.
-      */
-    rows: HTMLCollectionOf<HTMLTableRowElement>;
-    /**
-      * Sets or retrieves which dividing lines (inner borders) are displayed.
-      */
-    rules: string;
-    /**
-      * Sets or retrieves a description and/or structure of the object.
-      */
-    summary: string;
-    /**
-      * Retrieves a collection of all tBody objects in the table. Objects in this collection are in source order.
-      */
-    tBodies: HTMLCollectionOf<HTMLTableSectionElement>;
-    /**
-      * Retrieves the tFoot object of the table.
-      */
-    tFoot: HTMLTableSectionElement;
-    /**
-      * Retrieves the tHead object of the table.
-      */
-    tHead: HTMLTableSectionElement;
-    /**
-      * Sets or retrieves the width of the object.
-      */
-    width: string;
-    /**
-      * Creates an empty caption element in the table.
-      */
-    createCaption(): HTMLTableCaptionElement;
-    /**
-      * Creates an empty tBody element in the table.
-      */
-    createTBody(): HTMLTableSectionElement;
-    /**
-      * Creates an empty tFoot element in the table.
-      */
-    createTFoot(): HTMLTableSectionElement;
-    /**
-      * Returns the tHead element object if successful, or null otherwise.
-      */
-    createTHead(): HTMLTableSectionElement;
-    /**
-      * Deletes the caption element and its contents from the table.
-      */
-    deleteCaption(): void;
-    /**
-      * Removes the specified row (tr) from the element and from the rows collection.
-      * @param index Number that specifies the zero-based position in the rows collection of the row to remove.
-      */
-    deleteRow(index?: number): void;
-    /**
-      * Deletes the tFoot element and its contents from the table.
-      */
-    deleteTFoot(): void;
-    /**
-      * Deletes the tHead element and its contents from the table.
-      */
-    deleteTHead(): void;
-    /**
-      * Creates a new row (tr) in the table, and adds the row to the rows collection.
-      * @param index Number that specifies where to insert the row in the rows collection. The default value is -1, which appends the new row to the end of the rows collection.
-      */
-    insertRow(index?: number): HTMLTableRowElement;
-}
-
-declare var HTMLTableElement: {
-    prototype: HTMLTableElement;
-    new(): HTMLTableElement;
-}
-
-interface HTMLTableHeaderCellElement extends HTMLTableCellElement {
-    /**
-      * Sets or retrieves the group of cells in a table to which the object's information applies.
-      */
-    scope: string;
-}
-
-declare var HTMLTableHeaderCellElement: {
-    prototype: HTMLTableHeaderCellElement;
-    new(): HTMLTableHeaderCellElement;
-}
-
-interface HTMLTableRowElement extends HTMLElement, HTMLTableAlignment {
-    /**
-      * Sets or retrieves how the object is aligned with adjacent text.
-      */
-    align: string;
-    bgColor: any;
-    /**
-      * Retrieves a collection of all cells in the table row.
-      */
-    cells: HTMLCollectionOf<HTMLTableDataCellElement | HTMLTableHeaderCellElement>;
-    /**
-      * Sets or retrieves the height of the object.
-      */
-    height: any;
-    /**
-      * Retrieves the position of the object in the rows collection for the table.
-      */
-    readonly rowIndex: number;
-    /**
-      * Retrieves the position of the object in the collection.
-      */
-    readonly sectionRowIndex: number;
-    /**
-      * Removes the specified cell from the table row, as well as from the cells collection.
-      * @param index Number that specifies the zero-based position of the cell to remove from the table row. If no value is provided, the last cell in the cells collection is deleted.
-      */
-    deleteCell(index?: number): void;
-    /**
-      * Creates a new cell in the table row, and adds the cell to the cells collection.
-      * @param index Number that specifies where to insert the cell in the tr. The default value is -1, which appends the new cell to the end of the cells collection.
-      */
-    insertCell(index?: number): HTMLTableDataCellElement;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLTableRowElement: {
-    prototype: HTMLTableRowElement;
-    new(): HTMLTableRowElement;
-}
-
-interface HTMLTableSectionElement extends HTMLElement, HTMLTableAlignment {
-    /**
-      * Sets or retrieves a value that indicates the table alignment.
-      */
-    align: string;
-    /**
-      * Sets or retrieves the number of horizontal rows contained in the object.
-      */
-    rows: HTMLCollectionOf<HTMLTableRowElement>;
-    /**
-      * Removes the specified row (tr) from the element and from the rows collection.
-      * @param index Number that specifies the zero-based position in the rows collection of the row to remove.
-      */
-    deleteRow(index?: number): void;
-    /**
-      * Creates a new row (tr) in the table, and adds the row to the rows collection.
-      * @param index Number that specifies where to insert the row in the rows collection. The default value is -1, which appends the new row to the end of the rows collection.
-      */
-    insertRow(index?: number): HTMLTableRowElement;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLTableSectionElement: {
-    prototype: HTMLTableSectionElement;
-    new(): HTMLTableSectionElement;
-}
-
-interface HTMLTemplateElement extends HTMLElement {
-    readonly content: DocumentFragment;
-}
-
-declare var HTMLTemplateElement: {
-    prototype: HTMLTemplateElement;
-    new(): HTMLTemplateElement;
-}
-
-interface HTMLTextAreaElement extends HTMLElement {
-    /**
-      * Provides a way to direct a user to a specific field when a document loads. This can provide both direction and convenience for a user, reducing the need to click or tab to a field when a page opens. This attribute is true when present on an element, and false when missing.
-      */
-    autofocus: boolean;
-    /**
-      * Sets or retrieves the width of the object.
-      */
-    cols: number;
-    /**
-      * Sets or retrieves the initial contents of the object.
-      */
-    defaultValue: string;
-    disabled: boolean;
-    /**
-      * Retrieves a reference to the form that the object is embedded in.
-      */
-    readonly form: HTMLFormElement;
-    /**
-      * Sets or retrieves the maximum number of characters that the user can enter in a text control.
-      */
-    maxLength: number;
-    /**
-      * Sets or retrieves the name of the object.
-      */
-    name: string;
-    /**
-      * Gets or sets a text string that is displayed in an input field as a hint or prompt to users as the format or type of information they need to enter.The text appears in an input field until the user puts focus on the field.
-      */
-    placeholder: string;
-    /**
-      * Sets or retrieves the value indicated whether the content of the object is read-only.
-      */
-    readOnly: boolean;
-    /**
-      * When present, marks an element that can't be submitted without a value.
-      */
-    required: boolean;
-    /**
-      * Sets or retrieves the number of horizontal rows contained in the object.
-      */
-    rows: number;
-    /**
-      * Gets or sets the end position or offset of a text selection.
-      */
-    selectionEnd: number;
-    /**
-      * Gets or sets the starting position or offset of a text selection.
-      */
-    selectionStart: number;
-    /**
-      * Sets or retrieves the value indicating whether the control is selected.
-      */
-    status: any;
-    /**
-      * Retrieves the type of control.
-      */
-    readonly type: string;
-    /**
-      * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
-      */
-    readonly validationMessage: string;
-    /**
-      * Returns a  ValidityState object that represents the validity states of an element.
-      */
-    readonly validity: ValidityState;
-    /**
-      * Retrieves or sets the text in the entry field of the textArea element.
-      */
-    value: string;
-    /**
-      * Returns whether an element will successfully validate based on forms validation rules and constraints.
-      */
-    readonly willValidate: boolean;
-    /**
-      * Sets or retrieves how to handle wordwrapping in the object.
-      */
-    wrap: string;
-    minLength: number;
-    /**
-      * Returns whether a form will validate when it is submitted, without having to submit it.
-      */
-    checkValidity(): boolean;
-    /**
-      * Highlights the input area of a form element.
-      */
-    select(): void;
-    /**
-      * Sets a custom error message that is displayed when a form is submitted.
-      * @param error Sets a custom error message that is displayed when a form is submitted.
-      */
-    setCustomValidity(error: string): void;
-    /**
-      * Sets the start and end positions of a selection in a text field.
-      * @param start The offset into the text field for the start of the selection.
-      * @param end The offset into the text field for the end of the selection.
-      */
-    setSelectionRange(start: number, end: number): void;
-}
-
-declare var HTMLTextAreaElement: {
-    prototype: HTMLTextAreaElement;
-    new(): HTMLTextAreaElement;
-}
-
-interface HTMLTitleElement extends HTMLElement {
-    /**
-      * Retrieves or sets the text of the object as a string. 
-      */
-    text: string;
-}
-
-declare var HTMLTitleElement: {
-    prototype: HTMLTitleElement;
-    new(): HTMLTitleElement;
-}
-
-interface HTMLTrackElement extends HTMLElement {
-    default: boolean;
-    kind: string;
-    label: string;
-    readonly readyState: number;
-    src: string;
-    srclang: string;
-    readonly track: TextTrack;
-    readonly ERROR: number;
-    readonly LOADED: number;
-    readonly LOADING: number;
-    readonly NONE: number;
-}
-
-declare var HTMLTrackElement: {
-    prototype: HTMLTrackElement;
-    new(): HTMLTrackElement;
-    readonly ERROR: number;
-    readonly LOADED: number;
-    readonly LOADING: number;
-    readonly NONE: number;
-}
-
-interface HTMLUListElement extends HTMLElement {
-    compact: boolean;
-    type: string;
-}
-
-declare var HTMLUListElement: {
-    prototype: HTMLUListElement;
-    new(): HTMLUListElement;
-}
-
-interface HTMLUnknownElement extends HTMLElement {
-}
-
-declare var HTMLUnknownElement: {
-    prototype: HTMLUnknownElement;
-    new(): HTMLUnknownElement;
-}
-
-interface HTMLVideoElement extends HTMLMediaElement {
-    /**
-      * Gets or sets the height of the video element.
-      */
-    height: number;
-    msHorizontalMirror: boolean;
-    readonly msIsLayoutOptimalForPlayback: boolean;
-    readonly msIsStereo3D: boolean;
-    msStereo3DPackingMode: string;
-    msStereo3DRenderMode: string;
-    msZoom: boolean;
-    onMSVideoFormatChanged: (this: this, ev: Event) => any;
-    onMSVideoFrameStepCompleted: (this: this, ev: Event) => any;
-    onMSVideoOptimalLayoutChanged: (this: this, ev: Event) => any;
-    /**
-      * Gets or sets a URL of an image to display, for example, like a movie poster. This can be a still frame from the video, or another image if no video data is available.
-      */
-    poster: string;
-    /**
-      * Gets the intrinsic height of a video in CSS pixels, or zero if the dimensions are not known.
-      */
-    readonly videoHeight: number;
-    /**
-      * Gets the intrinsic width of a video in CSS pixels, or zero if the dimensions are not known.
-      */
-    readonly videoWidth: number;
-    readonly webkitDisplayingFullscreen: boolean;
-    readonly webkitSupportsFullscreen: boolean;
-    /**
-      * Gets or sets the width of the video element.
-      */
-    width: number;
-    getVideoPlaybackQuality(): VideoPlaybackQuality;
-    msFrameStep(forward: boolean): void;
-    msInsertVideoEffect(activatableClassId: string, effectRequired: boolean, config?: any): void;
-    msSetVideoRectangle(left: number, top: number, right: number, bottom: number): void;
-    webkitEnterFullScreen(): void;
-    webkitEnterFullscreen(): void;
-    webkitExitFullScreen(): void;
-    webkitExitFullscreen(): void;
-    addEventListener(type: "MSContentZoom", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureChange", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureDoubleTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureEnd", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureHold", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGotPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSInertiaStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSLostPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSManipulationStateChanged", listener: (this: this, ev: MSManipulationEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerCancel", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerDown", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerEnter", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerLeave", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerMove", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOut", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOver", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerUp", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSVideoFormatChanged", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSVideoFrameStepCompleted", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSVideoOptimalLayoutChanged", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "abort", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "activate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ariarequest", listener: (this: this, ev: AriaRequestEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforecopy", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforecut", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforedeactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforepaste", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "blur", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplay", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplaythrough", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "change", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "click", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "command", listener: (this: this, ev: CommandEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "contextmenu", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "copy", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "cuechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "cut", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dblclick", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "deactivate", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drag", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragend", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragenter", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragleave", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragover", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragstart", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drop", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "durationchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "emptied", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "encrypted", listener: (this: this, ev: MediaEncryptedEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ended", listener: (this: this, ev: MediaStreamErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "focus", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "gotpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "input", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "invalid", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "keydown", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keypress", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keyup", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadeddata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadedmetadata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "lostpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousedown", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseenter", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseleave", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousemove", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseout", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseover", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseup", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousewheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "msneedkey", listener: (this: this, ev: MSMediaKeyNeededEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "paste", listener: (this: this, ev: ClipboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pause", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "play", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "playing", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointercancel", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerdown", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerenter", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerleave", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointermove", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerout", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerover", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerup", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "progress", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ratechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "reset", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "scroll", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeked", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeking", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "select", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "selectstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "stalled", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "submit", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "suspend", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "timeupdate", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchcancel", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchend", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchmove", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchstart", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "volumechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "waiting", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenerror", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "wheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var HTMLVideoElement: {
-    prototype: HTMLVideoElement;
-    new(): HTMLVideoElement;
-}
-
-interface HashChangeEvent extends Event {
-    readonly newURL: string | null;
-    readonly oldURL: string | null;
-}
-
-declare var HashChangeEvent: {
-    prototype: HashChangeEvent;
-    new(type: string, eventInitDict?: HashChangeEventInit): HashChangeEvent;
-}
-
-interface History {
-    readonly length: number;
-    readonly state: any;
-    scrollRestoration: ScrollRestoration;
-    back(): void;
-    forward(): void;
-    go(delta?: number): void;
-    pushState(data: any, title: string, url?: string | null): void;
-    replaceState(data: any, title: string, url?: string | null): void;
-}
-
-declare var History: {
-    prototype: History;
-    new(): History;
-}
-
-interface IDBCursor {
-    readonly direction: string;
-    key: IDBKeyRange | IDBValidKey;
-    readonly primaryKey: any;
-    source: IDBObjectStore | IDBIndex;
-    advance(count: number): void;
-    continue(key?: IDBKeyRange | IDBValidKey): void;
-    delete(): IDBRequest;
-    update(value: any): IDBRequest;
-    readonly NEXT: string;
-    readonly NEXT_NO_DUPLICATE: string;
-    readonly PREV: string;
-    readonly PREV_NO_DUPLICATE: string;
-}
-
-declare var IDBCursor: {
-    prototype: IDBCursor;
-    new(): IDBCursor;
-    readonly NEXT: string;
-    readonly NEXT_NO_DUPLICATE: string;
-    readonly PREV: string;
-    readonly PREV_NO_DUPLICATE: string;
-}
-
-interface IDBCursorWithValue extends IDBCursor {
-    readonly value: any;
-}
-
-declare var IDBCursorWithValue: {
-    prototype: IDBCursorWithValue;
-    new(): IDBCursorWithValue;
-}
-
-interface IDBDatabase extends EventTarget {
-    readonly name: string;
-    readonly objectStoreNames: DOMStringList;
-    onabort: (this: this, ev: Event) => any;
-    onerror: (this: this, ev: ErrorEvent) => any;
-    version: number;
-    onversionchange: (ev: IDBVersionChangeEvent) => any;
-    close(): void;
-    createObjectStore(name: string, optionalParameters?: IDBObjectStoreParameters): IDBObjectStore;
-    deleteObjectStore(name: string): void;
-    transaction(storeNames: string | string[], mode?: string): IDBTransaction;
-    addEventListener(type: "versionchange", listener: (ev: IDBVersionChangeEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "abort", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var IDBDatabase: {
-    prototype: IDBDatabase;
-    new(): IDBDatabase;
-}
-
-interface IDBFactory {
-    cmp(first: any, second: any): number;
-    deleteDatabase(name: string): IDBOpenDBRequest;
-    open(name: string, version?: number): IDBOpenDBRequest;
-}
-
-declare var IDBFactory: {
-    prototype: IDBFactory;
-    new(): IDBFactory;
-}
-
-interface IDBIndex {
-    keyPath: string | string[];
-    readonly name: string;
-    readonly objectStore: IDBObjectStore;
-    readonly unique: boolean;
-    multiEntry: boolean;
-    count(key?: IDBKeyRange | IDBValidKey): IDBRequest;
-    get(key: IDBKeyRange | IDBValidKey): IDBRequest;
-    getKey(key: IDBKeyRange | IDBValidKey): IDBRequest;
-    openCursor(range?: IDBKeyRange | IDBValidKey, direction?: string): IDBRequest;
-    openKeyCursor(range?: IDBKeyRange | IDBValidKey, direction?: string): IDBRequest;
-}
-
-declare var IDBIndex: {
-    prototype: IDBIndex;
-    new(): IDBIndex;
-}
-
-interface IDBKeyRange {
-    readonly lower: any;
-    readonly lowerOpen: boolean;
-    readonly upper: any;
-    readonly upperOpen: boolean;
-}
-
-declare var IDBKeyRange: {
-    prototype: IDBKeyRange;
-    new(): IDBKeyRange;
-    bound(lower: any, upper: any, lowerOpen?: boolean, upperOpen?: boolean): IDBKeyRange;
-    lowerBound(lower: any, open?: boolean): IDBKeyRange;
-    only(value: any): IDBKeyRange;
-    upperBound(upper: any, open?: boolean): IDBKeyRange;
-}
-
-interface IDBObjectStore {
-    readonly indexNames: DOMStringList;
-    keyPath: string | string[];
-    readonly name: string;
-    readonly transaction: IDBTransaction;
-    autoIncrement: boolean;
-    add(value: any, key?: IDBKeyRange | IDBValidKey): IDBRequest;
-    clear(): IDBRequest;
-    count(key?: IDBKeyRange | IDBValidKey): IDBRequest;
-    createIndex(name: string, keyPath: string | string[], optionalParameters?: IDBIndexParameters): IDBIndex;
-    delete(key: IDBKeyRange | IDBValidKey): IDBRequest;
-    deleteIndex(indexName: string): void;
-    get(key: any): IDBRequest;
-    index(name: string): IDBIndex;
-    openCursor(range?: IDBKeyRange | IDBValidKey, direction?: string): IDBRequest;
-    put(value: any, key?: IDBKeyRange | IDBValidKey): IDBRequest;
-}
-
-declare var IDBObjectStore: {
-    prototype: IDBObjectStore;
-    new(): IDBObjectStore;
-}
-
-interface IDBOpenDBRequest extends IDBRequest {
-    onblocked: (this: this, ev: Event) => any;
-    onupgradeneeded: (this: this, ev: IDBVersionChangeEvent) => any;
-    addEventListener(type: "blocked", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "success", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "upgradeneeded", listener: (this: this, ev: IDBVersionChangeEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var IDBOpenDBRequest: {
-    prototype: IDBOpenDBRequest;
-    new(): IDBOpenDBRequest;
-}
-
-interface IDBRequest extends EventTarget {
-    readonly error: DOMError;
-    onerror: (this: this, ev: ErrorEvent) => any;
-    onsuccess: (this: this, ev: Event) => any;
-    readonly readyState: string;
-    readonly result: any;
-    source: IDBObjectStore | IDBIndex | IDBCursor;
-    readonly transaction: IDBTransaction;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "success", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var IDBRequest: {
-    prototype: IDBRequest;
-    new(): IDBRequest;
-}
-
-interface IDBTransaction extends EventTarget {
-    readonly db: IDBDatabase;
-    readonly error: DOMError;
-    readonly mode: string;
-    onabort: (this: this, ev: Event) => any;
-    oncomplete: (this: this, ev: Event) => any;
-    onerror: (this: this, ev: ErrorEvent) => any;
-    abort(): void;
-    objectStore(name: string): IDBObjectStore;
-    readonly READ_ONLY: string;
-    readonly READ_WRITE: string;
-    readonly VERSION_CHANGE: string;
-    addEventListener(type: "abort", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "complete", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var IDBTransaction: {
-    prototype: IDBTransaction;
-    new(): IDBTransaction;
-    readonly READ_ONLY: string;
-    readonly READ_WRITE: string;
-    readonly VERSION_CHANGE: string;
-}
-
-interface IDBVersionChangeEvent extends Event {
-    readonly newVersion: number | null;
-    readonly oldVersion: number;
-}
-
-declare var IDBVersionChangeEvent: {
-    prototype: IDBVersionChangeEvent;
-    new(): IDBVersionChangeEvent;
-}
-
-interface ImageData {
-    data: Uint8ClampedArray;
-    readonly height: number;
-    readonly width: number;
-}
-
-declare var ImageData: {
-    prototype: ImageData;
-    new(width: number, height: number): ImageData;
-    new(array: Uint8ClampedArray, width: number, height: number): ImageData;
-}
-
-interface KeyboardEvent extends UIEvent {
-    readonly altKey: boolean;
-    readonly char: string | null;
-    readonly charCode: number;
-    readonly ctrlKey: boolean;
-    readonly key: string;
-    readonly keyCode: number;
-    readonly locale: string;
-    readonly location: number;
-    readonly metaKey: boolean;
-    readonly repeat: boolean;
-    readonly shiftKey: boolean;
-    readonly which: number;
-    readonly code: string;
-    getModifierState(keyArg: string): boolean;
-    initKeyboardEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, keyArg: string, locationArg: number, modifiersListArg: string, repeat: boolean, locale: string): void;
-    readonly DOM_KEY_LOCATION_JOYSTICK: number;
-    readonly DOM_KEY_LOCATION_LEFT: number;
-    readonly DOM_KEY_LOCATION_MOBILE: number;
-    readonly DOM_KEY_LOCATION_NUMPAD: number;
-    readonly DOM_KEY_LOCATION_RIGHT: number;
-    readonly DOM_KEY_LOCATION_STANDARD: number;
-}
-
-declare var KeyboardEvent: {
-    prototype: KeyboardEvent;
-    new(typeArg: string, eventInitDict?: KeyboardEventInit): KeyboardEvent;
-    readonly DOM_KEY_LOCATION_JOYSTICK: number;
-    readonly DOM_KEY_LOCATION_LEFT: number;
-    readonly DOM_KEY_LOCATION_MOBILE: number;
-    readonly DOM_KEY_LOCATION_NUMPAD: number;
-    readonly DOM_KEY_LOCATION_RIGHT: number;
-    readonly DOM_KEY_LOCATION_STANDARD: number;
-}
-
-interface ListeningStateChangedEvent extends Event {
-    readonly label: string;
-    readonly state: string;
-}
-
-declare var ListeningStateChangedEvent: {
-    prototype: ListeningStateChangedEvent;
-    new(): ListeningStateChangedEvent;
-}
-
-interface Location {
-    hash: string;
-    host: string;
-    hostname: string;
-    href: string;
-    readonly origin: string;
-    pathname: string;
-    port: string;
-    protocol: string;
-    search: string;
-    assign(url: string): void;
-    reload(forcedReload?: boolean): void;
-    replace(url: string): void;
-    toString(): string;
-}
-
-declare var Location: {
-    prototype: Location;
-    new(): Location;
-}
-
-interface LongRunningScriptDetectedEvent extends Event {
-    readonly executionTime: number;
-    stopPageScriptExecution: boolean;
-}
-
-declare var LongRunningScriptDetectedEvent: {
-    prototype: LongRunningScriptDetectedEvent;
-    new(): LongRunningScriptDetectedEvent;
-}
-
-interface MSApp {
-    clearTemporaryWebDataAsync(): MSAppAsyncOperation;
-    createBlobFromRandomAccessStream(type: string, seeker: any): Blob;
-    createDataPackage(object: any): any;
-    createDataPackageFromSelection(): any;
-    createFileFromStorageFile(storageFile: any): File;
-    createStreamFromInputStream(type: string, inputStream: any): MSStream;
-    execAsyncAtPriority(asynchronousCallback: MSExecAtPriorityFunctionCallback, priority: string, ...args: any[]): void;
-    execAtPriority(synchronousCallback: MSExecAtPriorityFunctionCallback, priority: string, ...args: any[]): any;
-    getCurrentPriority(): string;
-    getHtmlPrintDocumentSourceAsync(htmlDoc: any): PromiseLike<any>;
-    getViewId(view: any): any;
-    isTaskScheduledAtPriorityOrHigher(priority: string): boolean;
-    pageHandlesAllApplicationActivations(enabled: boolean): void;
-    suppressSubdownloadCredentialPrompts(suppress: boolean): void;
-    terminateApp(exceptionObject: any): void;
-    readonly CURRENT: string;
-    readonly HIGH: string;
-    readonly IDLE: string;
-    readonly NORMAL: string;
-}
-declare var MSApp: MSApp;
-
-interface MSAppAsyncOperation extends EventTarget {
-    readonly error: DOMError;
-    oncomplete: (this: this, ev: Event) => any;
-    onerror: (this: this, ev: ErrorEvent) => any;
-    readonly readyState: number;
-    readonly result: any;
-    start(): void;
-    readonly COMPLETED: number;
-    readonly ERROR: number;
-    readonly STARTED: number;
-    addEventListener(type: "complete", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var MSAppAsyncOperation: {
-    prototype: MSAppAsyncOperation;
-    new(): MSAppAsyncOperation;
-    readonly COMPLETED: number;
-    readonly ERROR: number;
-    readonly STARTED: number;
-}
-
-interface MSAssertion {
-    readonly id: string;
-    readonly type: string;
-}
-
-declare var MSAssertion: {
-    prototype: MSAssertion;
-    new(): MSAssertion;
-}
-
-interface MSBlobBuilder {
-    append(data: any, endings?: string): void;
-    getBlob(contentType?: string): Blob;
-}
-
-declare var MSBlobBuilder: {
-    prototype: MSBlobBuilder;
-    new(): MSBlobBuilder;
-}
-
-interface MSCredentials {
-    getAssertion(challenge: string, filter?: MSCredentialFilter, params?: MSSignatureParameters): PromiseLike<MSAssertion>;
-    makeCredential(accountInfo: MSAccountInfo, params: MSCredentialParameters[], challenge?: string): PromiseLike<MSAssertion>;
-}
-
-declare var MSCredentials: {
-    prototype: MSCredentials;
-    new(): MSCredentials;
-}
-
-interface MSFIDOCredentialAssertion extends MSAssertion {
-    readonly algorithm: string | Algorithm;
-    readonly attestation: any;
-    readonly publicKey: string;
-    readonly transportHints: string[];
-}
-
-declare var MSFIDOCredentialAssertion: {
-    prototype: MSFIDOCredentialAssertion;
-    new(): MSFIDOCredentialAssertion;
-}
-
-interface MSFIDOSignature {
-    readonly authnrData: string;
-    readonly clientData: string;
-    readonly signature: string;
-}
-
-declare var MSFIDOSignature: {
-    prototype: MSFIDOSignature;
-    new(): MSFIDOSignature;
-}
-
-interface MSFIDOSignatureAssertion extends MSAssertion {
-    readonly signature: MSFIDOSignature;
-}
-
-declare var MSFIDOSignatureAssertion: {
-    prototype: MSFIDOSignatureAssertion;
-    new(): MSFIDOSignatureAssertion;
-}
-
-interface MSGesture {
-    target: Element;
-    addPointer(pointerId: number): void;
-    stop(): void;
-}
-
-declare var MSGesture: {
-    prototype: MSGesture;
-    new(): MSGesture;
-}
-
-interface MSGestureEvent extends UIEvent {
-    readonly clientX: number;
-    readonly clientY: number;
-    readonly expansion: number;
-    readonly gestureObject: any;
-    readonly hwTimestamp: number;
-    readonly offsetX: number;
-    readonly offsetY: number;
-    readonly rotation: number;
-    readonly scale: number;
-    readonly screenX: number;
-    readonly screenY: number;
-    readonly translationX: number;
-    readonly translationY: number;
-    readonly velocityAngular: number;
-    readonly velocityExpansion: number;
-    readonly velocityX: number;
-    readonly velocityY: number;
-    initGestureEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, offsetXArg: number, offsetYArg: number, translationXArg: number, translationYArg: number, scaleArg: number, expansionArg: number, rotationArg: number, velocityXArg: number, velocityYArg: number, velocityExpansionArg: number, velocityAngularArg: number, hwTimestampArg: number): void;
-    readonly MSGESTURE_FLAG_BEGIN: number;
-    readonly MSGESTURE_FLAG_CANCEL: number;
-    readonly MSGESTURE_FLAG_END: number;
-    readonly MSGESTURE_FLAG_INERTIA: number;
-    readonly MSGESTURE_FLAG_NONE: number;
-}
-
-declare var MSGestureEvent: {
-    prototype: MSGestureEvent;
-    new(): MSGestureEvent;
-    readonly MSGESTURE_FLAG_BEGIN: number;
-    readonly MSGESTURE_FLAG_CANCEL: number;
-    readonly MSGESTURE_FLAG_END: number;
-    readonly MSGESTURE_FLAG_INERTIA: number;
-    readonly MSGESTURE_FLAG_NONE: number;
-}
-
-interface MSGraphicsTrust {
-    readonly constrictionActive: boolean;
-    readonly status: string;
-}
-
-declare var MSGraphicsTrust: {
-    prototype: MSGraphicsTrust;
-    new(): MSGraphicsTrust;
-}
-
-interface MSHTMLWebViewElement extends HTMLElement {
-    readonly canGoBack: boolean;
-    readonly canGoForward: boolean;
-    readonly containsFullScreenElement: boolean;
-    readonly documentTitle: string;
-    height: number;
-    readonly settings: MSWebViewSettings;
-    src: string;
-    width: number;
-    addWebAllowedObject(name: string, applicationObject: any): void;
-    buildLocalStreamUri(contentIdentifier: string, relativePath: string): string;
-    capturePreviewToBlobAsync(): MSWebViewAsyncOperation;
-    captureSelectedContentToDataPackageAsync(): MSWebViewAsyncOperation;
-    getDeferredPermissionRequestById(id: number): DeferredPermissionRequest;
-    getDeferredPermissionRequests(): DeferredPermissionRequest[];
-    goBack(): void;
-    goForward(): void;
-    invokeScriptAsync(scriptName: string, ...args: any[]): MSWebViewAsyncOperation;
-    navigate(uri: string): void;
-    navigateToLocalStreamUri(source: string, streamResolver: any): void;
-    navigateToString(contents: string): void;
-    navigateWithHttpRequestMessage(requestMessage: any): void;
-    refresh(): void;
-    stop(): void;
-}
-
-declare var MSHTMLWebViewElement: {
-    prototype: MSHTMLWebViewElement;
-    new(): MSHTMLWebViewElement;
-}
-
-interface MSInputMethodContext extends EventTarget {
-    readonly compositionEndOffset: number;
-    readonly compositionStartOffset: number;
-    oncandidatewindowhide: (this: this, ev: Event) => any;
-    oncandidatewindowshow: (this: this, ev: Event) => any;
-    oncandidatewindowupdate: (this: this, ev: Event) => any;
-    readonly target: HTMLElement;
-    getCandidateWindowClientRect(): ClientRect;
-    getCompositionAlternatives(): string[];
-    hasComposition(): boolean;
-    isCandidateWindowVisible(): boolean;
-    addEventListener(type: "MSCandidateWindowHide", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSCandidateWindowShow", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSCandidateWindowUpdate", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var MSInputMethodContext: {
-    prototype: MSInputMethodContext;
-    new(): MSInputMethodContext;
-}
-
-interface MSManipulationEvent extends UIEvent {
-    readonly currentState: number;
-    readonly inertiaDestinationX: number;
-    readonly inertiaDestinationY: number;
-    readonly lastState: number;
-    initMSManipulationEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, lastState: number, currentState: number): void;
-    readonly MS_MANIPULATION_STATE_ACTIVE: number;
-    readonly MS_MANIPULATION_STATE_CANCELLED: number;
-    readonly MS_MANIPULATION_STATE_COMMITTED: number;
-    readonly MS_MANIPULATION_STATE_DRAGGING: number;
-    readonly MS_MANIPULATION_STATE_INERTIA: number;
-    readonly MS_MANIPULATION_STATE_PRESELECT: number;
-    readonly MS_MANIPULATION_STATE_SELECTING: number;
-    readonly MS_MANIPULATION_STATE_STOPPED: number;
-}
-
-declare var MSManipulationEvent: {
-    prototype: MSManipulationEvent;
-    new(): MSManipulationEvent;
-    readonly MS_MANIPULATION_STATE_ACTIVE: number;
-    readonly MS_MANIPULATION_STATE_CANCELLED: number;
-    readonly MS_MANIPULATION_STATE_COMMITTED: number;
-    readonly MS_MANIPULATION_STATE_DRAGGING: number;
-    readonly MS_MANIPULATION_STATE_INERTIA: number;
-    readonly MS_MANIPULATION_STATE_PRESELECT: number;
-    readonly MS_MANIPULATION_STATE_SELECTING: number;
-    readonly MS_MANIPULATION_STATE_STOPPED: number;
-}
-
-interface MSMediaKeyError {
-    readonly code: number;
-    readonly systemCode: number;
-    readonly MS_MEDIA_KEYERR_CLIENT: number;
-    readonly MS_MEDIA_KEYERR_DOMAIN: number;
-    readonly MS_MEDIA_KEYERR_HARDWARECHANGE: number;
-    readonly MS_MEDIA_KEYERR_OUTPUT: number;
-    readonly MS_MEDIA_KEYERR_SERVICE: number;
-    readonly MS_MEDIA_KEYERR_UNKNOWN: number;
-}
-
-declare var MSMediaKeyError: {
-    prototype: MSMediaKeyError;
-    new(): MSMediaKeyError;
-    readonly MS_MEDIA_KEYERR_CLIENT: number;
-    readonly MS_MEDIA_KEYERR_DOMAIN: number;
-    readonly MS_MEDIA_KEYERR_HARDWARECHANGE: number;
-    readonly MS_MEDIA_KEYERR_OUTPUT: number;
-    readonly MS_MEDIA_KEYERR_SERVICE: number;
-    readonly MS_MEDIA_KEYERR_UNKNOWN: number;
-}
-
-interface MSMediaKeyMessageEvent extends Event {
-    readonly destinationURL: string | null;
-    readonly message: Uint8Array;
-}
-
-declare var MSMediaKeyMessageEvent: {
-    prototype: MSMediaKeyMessageEvent;
-    new(): MSMediaKeyMessageEvent;
-}
-
-interface MSMediaKeyNeededEvent extends Event {
-    readonly initData: Uint8Array | null;
-}
-
-declare var MSMediaKeyNeededEvent: {
-    prototype: MSMediaKeyNeededEvent;
-    new(): MSMediaKeyNeededEvent;
-}
-
-interface MSMediaKeySession extends EventTarget {
-    readonly error: MSMediaKeyError | null;
-    readonly keySystem: string;
-    readonly sessionId: string;
-    close(): void;
-    update(key: Uint8Array): void;
-}
-
-declare var MSMediaKeySession: {
-    prototype: MSMediaKeySession;
-    new(): MSMediaKeySession;
-}
-
-interface MSMediaKeys {
-    readonly keySystem: string;
-    createSession(type: string, initData: Uint8Array, cdmData?: Uint8Array): MSMediaKeySession;
-}
-
-declare var MSMediaKeys: {
-    prototype: MSMediaKeys;
-    new(keySystem: string): MSMediaKeys;
-    isTypeSupported(keySystem: string, type?: string): boolean;
-    isTypeSupportedWithFeatures(keySystem: string, type?: string): string;
-}
-
-interface MSPointerEvent extends MouseEvent {
-    readonly currentPoint: any;
-    readonly height: number;
-    readonly hwTimestamp: number;
-    readonly intermediatePoints: any;
-    readonly isPrimary: boolean;
-    readonly pointerId: number;
-    readonly pointerType: any;
-    readonly pressure: number;
-    readonly rotation: number;
-    readonly tiltX: number;
-    readonly tiltY: number;
-    readonly width: number;
-    getCurrentPoint(element: Element): void;
-    getIntermediatePoints(element: Element): void;
-    initPointerEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, ctrlKeyArg: boolean, altKeyArg: boolean, shiftKeyArg: boolean, metaKeyArg: boolean, buttonArg: number, relatedTargetArg: EventTarget, offsetXArg: number, offsetYArg: number, widthArg: number, heightArg: number, pressure: number, rotation: number, tiltX: number, tiltY: number, pointerIdArg: number, pointerType: any, hwTimestampArg: number, isPrimary: boolean): void;
-}
-
-declare var MSPointerEvent: {
-    prototype: MSPointerEvent;
-    new(typeArg: string, eventInitDict?: PointerEventInit): MSPointerEvent;
-}
-
-interface MSRangeCollection {
-    readonly length: number;
-    item(index: number): Range;
-    [index: number]: Range;
-}
-
-declare var MSRangeCollection: {
-    prototype: MSRangeCollection;
-    new(): MSRangeCollection;
-}
-
-interface MSSiteModeEvent extends Event {
-    readonly actionURL: string;
-    readonly buttonID: number;
-}
-
-declare var MSSiteModeEvent: {
-    prototype: MSSiteModeEvent;
-    new(): MSSiteModeEvent;
-}
-
-interface MSStream {
-    readonly type: string;
-    msClose(): void;
-    msDetachStream(): any;
-}
-
-declare var MSStream: {
-    prototype: MSStream;
-    new(): MSStream;
-}
-
-interface MSStreamReader extends EventTarget, MSBaseReader {
-    readonly error: DOMError;
-    readAsArrayBuffer(stream: MSStream, size?: number): void;
-    readAsBinaryString(stream: MSStream, size?: number): void;
-    readAsBlob(stream: MSStream, size?: number): void;
-    readAsDataURL(stream: MSStream, size?: number): void;
-    readAsText(stream: MSStream, encoding?: string, size?: number): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var MSStreamReader: {
-    prototype: MSStreamReader;
-    new(): MSStreamReader;
-}
-
-interface MSWebViewAsyncOperation extends EventTarget {
-    readonly error: DOMError;
-    oncomplete: (this: this, ev: Event) => any;
-    onerror: (this: this, ev: ErrorEvent) => any;
-    readonly readyState: number;
-    readonly result: any;
-    readonly target: MSHTMLWebViewElement;
-    readonly type: number;
-    start(): void;
-    readonly COMPLETED: number;
-    readonly ERROR: number;
-    readonly STARTED: number;
-    readonly TYPE_CAPTURE_PREVIEW_TO_RANDOM_ACCESS_STREAM: number;
-    readonly TYPE_CREATE_DATA_PACKAGE_FROM_SELECTION: number;
-    readonly TYPE_INVOKE_SCRIPT: number;
-    addEventListener(type: "complete", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var MSWebViewAsyncOperation: {
-    prototype: MSWebViewAsyncOperation;
-    new(): MSWebViewAsyncOperation;
-    readonly COMPLETED: number;
-    readonly ERROR: number;
-    readonly STARTED: number;
-    readonly TYPE_CAPTURE_PREVIEW_TO_RANDOM_ACCESS_STREAM: number;
-    readonly TYPE_CREATE_DATA_PACKAGE_FROM_SELECTION: number;
-    readonly TYPE_INVOKE_SCRIPT: number;
-}
-
-interface MSWebViewSettings {
-    isIndexedDBEnabled: boolean;
-    isJavaScriptEnabled: boolean;
-}
-
-declare var MSWebViewSettings: {
-    prototype: MSWebViewSettings;
-    new(): MSWebViewSettings;
-}
-
-interface MediaDeviceInfo {
-    readonly deviceId: string;
-    readonly groupId: string;
-    readonly kind: string;
-    readonly label: string;
-}
-
-declare var MediaDeviceInfo: {
-    prototype: MediaDeviceInfo;
-    new(): MediaDeviceInfo;
-}
-
-interface MediaDevices extends EventTarget {
-    ondevicechange: (this: this, ev: Event) => any;
-    enumerateDevices(): any;
-    getSupportedConstraints(): MediaTrackSupportedConstraints;
-    getUserMedia(constraints: MediaStreamConstraints): PromiseLike<MediaStream>;
-    addEventListener(type: "devicechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var MediaDevices: {
-    prototype: MediaDevices;
-    new(): MediaDevices;
-}
-
-interface MediaElementAudioSourceNode extends AudioNode {
-}
-
-declare var MediaElementAudioSourceNode: {
-    prototype: MediaElementAudioSourceNode;
-    new(): MediaElementAudioSourceNode;
-}
-
-interface MediaEncryptedEvent extends Event {
-    readonly initData: ArrayBuffer | null;
-    readonly initDataType: string;
-}
-
-declare var MediaEncryptedEvent: {
-    prototype: MediaEncryptedEvent;
-    new(type: string, eventInitDict?: MediaEncryptedEventInit): MediaEncryptedEvent;
-}
-
-interface MediaError {
-    readonly code: number;
-    readonly msExtendedCode: number;
-    readonly MEDIA_ERR_ABORTED: number;
-    readonly MEDIA_ERR_DECODE: number;
-    readonly MEDIA_ERR_NETWORK: number;
-    readonly MEDIA_ERR_SRC_NOT_SUPPORTED: number;
-    readonly MS_MEDIA_ERR_ENCRYPTED: number;
-}
-
-declare var MediaError: {
-    prototype: MediaError;
-    new(): MediaError;
-    readonly MEDIA_ERR_ABORTED: number;
-    readonly MEDIA_ERR_DECODE: number;
-    readonly MEDIA_ERR_NETWORK: number;
-    readonly MEDIA_ERR_SRC_NOT_SUPPORTED: number;
-    readonly MS_MEDIA_ERR_ENCRYPTED: number;
-}
-
-interface MediaKeyMessageEvent extends Event {
-    readonly message: ArrayBuffer;
-    readonly messageType: string;
-}
-
-declare var MediaKeyMessageEvent: {
-    prototype: MediaKeyMessageEvent;
-    new(type: string, eventInitDict?: MediaKeyMessageEventInit): MediaKeyMessageEvent;
-}
-
-interface MediaKeySession extends EventTarget {
-    readonly closed: PromiseLike<void>;
-    readonly expiration: number;
-    readonly keyStatuses: MediaKeyStatusMap;
-    readonly sessionId: string;
-    close(): PromiseLike<void>;
-    generateRequest(initDataType: string, initData: any): PromiseLike<void>;
-    load(sessionId: string): PromiseLike<boolean>;
-    remove(): PromiseLike<void>;
-    update(response: any): PromiseLike<void>;
-}
-
-declare var MediaKeySession: {
-    prototype: MediaKeySession;
-    new(): MediaKeySession;
-}
-
-interface MediaKeyStatusMap {
-    readonly size: number;
-    forEach(callback: ForEachCallback): void;
-    get(keyId: any): string;
-    has(keyId: any): boolean;
-}
-
-declare var MediaKeyStatusMap: {
-    prototype: MediaKeyStatusMap;
-    new(): MediaKeyStatusMap;
-}
-
-interface MediaKeySystemAccess {
-    readonly keySystem: string;
-    createMediaKeys(): PromiseLike<MediaKeys>;
-    getConfiguration(): MediaKeySystemConfiguration;
-}
-
-declare var MediaKeySystemAccess: {
-    prototype: MediaKeySystemAccess;
-    new(): MediaKeySystemAccess;
-}
-
-interface MediaKeys {
-    createSession(sessionType?: string): MediaKeySession;
-    setServerCertificate(serverCertificate: any): PromiseLike<void>;
-}
-
-declare var MediaKeys: {
-    prototype: MediaKeys;
-    new(): MediaKeys;
-}
-
-interface MediaList {
-    readonly length: number;
-    mediaText: string;
-    appendMedium(newMedium: string): void;
-    deleteMedium(oldMedium: string): void;
-    item(index: number): string;
-    toString(): string;
-    [index: number]: string;
-}
-
-declare var MediaList: {
-    prototype: MediaList;
-    new(): MediaList;
-}
-
-interface MediaQueryList {
-    readonly matches: boolean;
-    readonly media: string;
-    addListener(listener: MediaQueryListListener): void;
-    removeListener(listener: MediaQueryListListener): void;
-}
-
-declare var MediaQueryList: {
-    prototype: MediaQueryList;
-    new(): MediaQueryList;
-}
-
-interface MediaSource extends EventTarget {
-    readonly activeSourceBuffers: SourceBufferList;
-    duration: number;
-    readonly readyState: string;
-    readonly sourceBuffers: SourceBufferList;
-    addSourceBuffer(type: string): SourceBuffer;
-    endOfStream(error?: number): void;
-    removeSourceBuffer(sourceBuffer: SourceBuffer): void;
-}
-
-declare var MediaSource: {
-    prototype: MediaSource;
-    new(): MediaSource;
-    isTypeSupported(type: string): boolean;
-}
-
-interface MediaStream extends EventTarget {
-    readonly active: boolean;
-    readonly id: string;
-    onactive: (this: this, ev: Event) => any;
-    onaddtrack: (this: this, ev: TrackEvent) => any;
-    oninactive: (this: this, ev: Event) => any;
-    onremovetrack: (this: this, ev: TrackEvent) => any;
-    addTrack(track: MediaStreamTrack): void;
-    clone(): MediaStream;
-    getAudioTracks(): MediaStreamTrack[];
-    getTrackById(trackId: string): MediaStreamTrack | null;
-    getTracks(): MediaStreamTrack[];
-    getVideoTracks(): MediaStreamTrack[];
-    removeTrack(track: MediaStreamTrack): void;
-    stop(): void;
-    addEventListener(type: "active", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "addtrack", listener: (this: this, ev: TrackEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "inactive", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "removetrack", listener: (this: this, ev: TrackEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var MediaStream: {
-    prototype: MediaStream;
-    new(streamOrTracks?: MediaStream | MediaStreamTrack[]): MediaStream;
-}
-
-interface MediaStreamAudioSourceNode extends AudioNode {
-}
-
-declare var MediaStreamAudioSourceNode: {
-    prototype: MediaStreamAudioSourceNode;
-    new(): MediaStreamAudioSourceNode;
-}
-
-interface MediaStreamError {
-    readonly constraintName: string | null;
-    readonly message: string | null;
-    readonly name: string;
-}
-
-declare var MediaStreamError: {
-    prototype: MediaStreamError;
-    new(): MediaStreamError;
-}
-
-interface MediaStreamErrorEvent extends Event {
-    readonly error: MediaStreamError | null;
-}
-
-declare var MediaStreamErrorEvent: {
-    prototype: MediaStreamErrorEvent;
-    new(type: string, eventInitDict?: MediaStreamErrorEventInit): MediaStreamErrorEvent;
-}
-
-interface MediaStreamTrack extends EventTarget {
-    enabled: boolean;
-    readonly id: string;
-    readonly kind: string;
-    readonly label: string;
-    readonly muted: boolean;
-    onended: (this: this, ev: MediaStreamErrorEvent) => any;
-    onmute: (this: this, ev: Event) => any;
-    onoverconstrained: (this: this, ev: MediaStreamErrorEvent) => any;
-    onunmute: (this: this, ev: Event) => any;
-    readonly readonly: boolean;
-    readonly readyState: string;
-    readonly remote: boolean;
-    applyConstraints(constraints: MediaTrackConstraints): PromiseLike<void>;
-    clone(): MediaStreamTrack;
-    getCapabilities(): MediaTrackCapabilities;
-    getConstraints(): MediaTrackConstraints;
-    getSettings(): MediaTrackSettings;
-    stop(): void;
-    addEventListener(type: "ended", listener: (this: this, ev: MediaStreamErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mute", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "overconstrained", listener: (this: this, ev: MediaStreamErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "unmute", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var MediaStreamTrack: {
-    prototype: MediaStreamTrack;
-    new(): MediaStreamTrack;
-}
-
-interface MediaStreamTrackEvent extends Event {
-    readonly track: MediaStreamTrack;
-}
-
-declare var MediaStreamTrackEvent: {
-    prototype: MediaStreamTrackEvent;
-    new(type: string, eventInitDict?: MediaStreamTrackEventInit): MediaStreamTrackEvent;
-}
-
-interface MessageChannel {
-    readonly port1: MessagePort;
-    readonly port2: MessagePort;
-}
-
-declare var MessageChannel: {
-    prototype: MessageChannel;
-    new(): MessageChannel;
-}
-
-interface MessageEvent extends Event {
-    readonly data: any;
-    readonly origin: string;
-    readonly ports: any;
-    readonly source: Window;
-    initMessageEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, dataArg: any, originArg: string, lastEventIdArg: string, sourceArg: Window): void;
-}
-
-declare var MessageEvent: {
-    prototype: MessageEvent;
-    new(type: string, eventInitDict?: MessageEventInit): MessageEvent;
-}
-
-interface MessagePort extends EventTarget {
-    onmessage: (this: this, ev: MessageEvent) => any;
-    close(): void;
-    postMessage(message?: any, ports?: any): void;
-    start(): void;
-    addEventListener(type: "message", listener: (this: this, ev: MessageEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var MessagePort: {
-    prototype: MessagePort;
-    new(): MessagePort;
-}
-
-interface MimeType {
-    readonly description: string;
-    readonly enabledPlugin: Plugin;
-    readonly suffixes: string;
-    readonly type: string;
-}
-
-declare var MimeType: {
-    prototype: MimeType;
-    new(): MimeType;
-}
-
-interface MimeTypeArray {
-    readonly length: number;
-    item(index: number): Plugin;
-    namedItem(type: string): Plugin;
-    [index: number]: Plugin;
-}
-
-declare var MimeTypeArray: {
-    prototype: MimeTypeArray;
-    new(): MimeTypeArray;
-}
-
-interface MouseEvent extends UIEvent {
-    readonly altKey: boolean;
-    readonly button: number;
-    readonly buttons: number;
-    readonly clientX: number;
-    readonly clientY: number;
-    readonly ctrlKey: boolean;
-    readonly fromElement: Element;
-    readonly layerX: number;
-    readonly layerY: number;
-    readonly metaKey: boolean;
-    readonly movementX: number;
-    readonly movementY: number;
-    readonly offsetX: number;
-    readonly offsetY: number;
-    readonly pageX: number;
-    readonly pageY: number;
-    readonly relatedTarget: EventTarget;
-    readonly screenX: number;
-    readonly screenY: number;
-    readonly shiftKey: boolean;
-    readonly toElement: Element;
-    readonly which: number;
-    readonly x: number;
-    readonly y: number;
-    getModifierState(keyArg: string): boolean;
-    initMouseEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, ctrlKeyArg: boolean, altKeyArg: boolean, shiftKeyArg: boolean, metaKeyArg: boolean, buttonArg: number, relatedTargetArg: EventTarget): void;
-}
-
-declare var MouseEvent: {
-    prototype: MouseEvent;
-    new(typeArg: string, eventInitDict?: MouseEventInit): MouseEvent;
-}
-
-interface MutationEvent extends Event {
-    readonly attrChange: number;
-    readonly attrName: string;
-    readonly newValue: string;
-    readonly prevValue: string;
-    readonly relatedNode: Node;
-    initMutationEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, relatedNodeArg: Node, prevValueArg: string, newValueArg: string, attrNameArg: string, attrChangeArg: number): void;
-    readonly ADDITION: number;
-    readonly MODIFICATION: number;
-    readonly REMOVAL: number;
-}
-
-declare var MutationEvent: {
-    prototype: MutationEvent;
-    new(): MutationEvent;
-    readonly ADDITION: number;
-    readonly MODIFICATION: number;
-    readonly REMOVAL: number;
-}
-
-interface MutationObserver {
-    disconnect(): void;
-    observe(target: Node, options: MutationObserverInit): void;
-    takeRecords(): MutationRecord[];
-}
-
-declare var MutationObserver: {
-    prototype: MutationObserver;
-    new(callback: MutationCallback): MutationObserver;
-}
-
-interface MutationRecord {
-    readonly addedNodes: NodeList;
-    readonly attributeName: string | null;
-    readonly attributeNamespace: string | null;
-    readonly nextSibling: Node | null;
-    readonly oldValue: string | null;
-    readonly previousSibling: Node | null;
-    readonly removedNodes: NodeList;
-    readonly target: Node;
-    readonly type: string;
-}
-
-declare var MutationRecord: {
-    prototype: MutationRecord;
-    new(): MutationRecord;
-}
-
-interface NamedNodeMap {
-    readonly length: number;
-    getNamedItem(name: string): Attr;
-    getNamedItemNS(namespaceURI: string | null, localName: string | null): Attr;
-    item(index: number): Attr;
-    removeNamedItem(name: string): Attr;
-    removeNamedItemNS(namespaceURI: string | null, localName: string | null): Attr;
-    setNamedItem(arg: Attr): Attr;
-    setNamedItemNS(arg: Attr): Attr;
-    [index: number]: Attr;
-}
-
-declare var NamedNodeMap: {
-    prototype: NamedNodeMap;
-    new(): NamedNodeMap;
-}
-
-interface NavigationCompletedEvent extends NavigationEvent {
-    readonly isSuccess: boolean;
-    readonly webErrorStatus: number;
-}
-
-declare var NavigationCompletedEvent: {
-    prototype: NavigationCompletedEvent;
-    new(): NavigationCompletedEvent;
-}
-
-interface NavigationEvent extends Event {
-    readonly uri: string;
-}
-
-declare var NavigationEvent: {
-    prototype: NavigationEvent;
-    new(): NavigationEvent;
-}
-
-interface NavigationEventWithReferrer extends NavigationEvent {
-    readonly referer: string;
-}
-
-declare var NavigationEventWithReferrer: {
-    prototype: NavigationEventWithReferrer;
-    new(): NavigationEventWithReferrer;
-}
-
-interface Navigator extends Object, NavigatorID, NavigatorOnLine, NavigatorContentUtils, NavigatorStorageUtils, NavigatorGeolocation, MSNavigatorDoNotTrack, MSFileSaver, NavigatorUserMedia {
-    readonly appCodeName: string;
-    readonly cookieEnabled: boolean;
-    readonly language: string;
-    readonly maxTouchPoints: number;
-    readonly mimeTypes: MimeTypeArray;
-    readonly msManipulationViewsEnabled: boolean;
-    readonly msMaxTouchPoints: number;
-    readonly msPointerEnabled: boolean;
-    readonly plugins: PluginArray;
-    readonly pointerEnabled: boolean;
-    readonly webdriver: boolean;
-    getGamepads(): Gamepad[];
-    javaEnabled(): boolean;
-    msLaunchUri(uri: string, successCallback?: MSLaunchUriCallback, noHandlerCallback?: MSLaunchUriCallback): void;
-    requestMediaKeySystemAccess(keySystem: string, supportedConfigurations: MediaKeySystemConfiguration[]): PromiseLike<MediaKeySystemAccess>;
-    vibrate(pattern: number | number[]): boolean;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var Navigator: {
-    prototype: Navigator;
-    new(): Navigator;
-}
-
-interface Node extends EventTarget {
-    readonly attributes: NamedNodeMap;
-    readonly baseURI: string | null;
-    readonly childNodes: NodeList;
-    readonly firstChild: Node;
-    readonly lastChild: Node;
-    readonly localName: string | null;
-    readonly namespaceURI: string | null;
-    readonly nextSibling: Node;
-    readonly nodeName: string;
-    readonly nodeType: number;
-    nodeValue: string | null;
-    readonly ownerDocument: Document;
-    readonly parentElement: HTMLElement;
-    readonly parentNode: Node;
-    readonly previousSibling: Node;
-    textContent: string | null;
-    appendChild(newChild: Node): Node;
-    cloneNode(deep?: boolean): Node;
-    compareDocumentPosition(other: Node): number;
-    contains(child: Node): boolean;
-    hasAttributes(): boolean;
-    hasChildNodes(): boolean;
-    insertBefore(newChild: Node, refChild: Node | null): Node;
-    isDefaultNamespace(namespaceURI: string | null): boolean;
-    isEqualNode(arg: Node): boolean;
-    isSameNode(other: Node): boolean;
-    lookupNamespaceURI(prefix: string | null): string | null;
-    lookupPrefix(namespaceURI: string | null): string | null;
-    normalize(): void;
-    removeChild(oldChild: Node): Node;
-    replaceChild(newChild: Node, oldChild: Node): Node;
-    readonly ATTRIBUTE_NODE: number;
-    readonly CDATA_SECTION_NODE: number;
-    readonly COMMENT_NODE: number;
-    readonly DOCUMENT_FRAGMENT_NODE: number;
-    readonly DOCUMENT_NODE: number;
-    readonly DOCUMENT_POSITION_CONTAINED_BY: number;
-    readonly DOCUMENT_POSITION_CONTAINS: number;
-    readonly DOCUMENT_POSITION_DISCONNECTED: number;
-    readonly DOCUMENT_POSITION_FOLLOWING: number;
-    readonly DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC: number;
-    readonly DOCUMENT_POSITION_PRECEDING: number;
-    readonly DOCUMENT_TYPE_NODE: number;
-    readonly ELEMENT_NODE: number;
-    readonly ENTITY_NODE: number;
-    readonly ENTITY_REFERENCE_NODE: number;
-    readonly NOTATION_NODE: number;
-    readonly PROCESSING_INSTRUCTION_NODE: number;
-    readonly TEXT_NODE: number;
-}
-
-declare var Node: {
-    prototype: Node;
-    new(): Node;
-    readonly ATTRIBUTE_NODE: number;
-    readonly CDATA_SECTION_NODE: number;
-    readonly COMMENT_NODE: number;
-    readonly DOCUMENT_FRAGMENT_NODE: number;
-    readonly DOCUMENT_NODE: number;
-    readonly DOCUMENT_POSITION_CONTAINED_BY: number;
-    readonly DOCUMENT_POSITION_CONTAINS: number;
-    readonly DOCUMENT_POSITION_DISCONNECTED: number;
-    readonly DOCUMENT_POSITION_FOLLOWING: number;
-    readonly DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC: number;
-    readonly DOCUMENT_POSITION_PRECEDING: number;
-    readonly DOCUMENT_TYPE_NODE: number;
-    readonly ELEMENT_NODE: number;
-    readonly ENTITY_NODE: number;
-    readonly ENTITY_REFERENCE_NODE: number;
-    readonly NOTATION_NODE: number;
-    readonly PROCESSING_INSTRUCTION_NODE: number;
-    readonly TEXT_NODE: number;
-}
-
-interface NodeFilter {
-    acceptNode(n: Node): number;
-}
-
-declare var NodeFilter: {
-    readonly FILTER_ACCEPT: number;
-    readonly FILTER_REJECT: number;
-    readonly FILTER_SKIP: number;
-    readonly SHOW_ALL: number;
-    readonly SHOW_ATTRIBUTE: number;
-    readonly SHOW_CDATA_SECTION: number;
-    readonly SHOW_COMMENT: number;
-    readonly SHOW_DOCUMENT: number;
-    readonly SHOW_DOCUMENT_FRAGMENT: number;
-    readonly SHOW_DOCUMENT_TYPE: number;
-    readonly SHOW_ELEMENT: number;
-    readonly SHOW_ENTITY: number;
-    readonly SHOW_ENTITY_REFERENCE: number;
-    readonly SHOW_NOTATION: number;
-    readonly SHOW_PROCESSING_INSTRUCTION: number;
-    readonly SHOW_TEXT: number;
-}
-
-interface NodeIterator {
-    readonly expandEntityReferences: boolean;
-    readonly filter: NodeFilter;
-    readonly root: Node;
-    readonly whatToShow: number;
-    detach(): void;
-    nextNode(): Node;
-    previousNode(): Node;
-}
-
-declare var NodeIterator: {
-    prototype: NodeIterator;
-    new(): NodeIterator;
-}
-
-interface NodeList {
-    readonly length: number;
-    item(index: number): Node;
-    [index: number]: Node;
-}
-
-declare var NodeList: {
-    prototype: NodeList;
-    new(): NodeList;
-}
-
-interface OES_element_index_uint {
-}
-
-declare var OES_element_index_uint: {
-    prototype: OES_element_index_uint;
-    new(): OES_element_index_uint;
-}
-
-interface OES_standard_derivatives {
-    readonly FRAGMENT_SHADER_DERIVATIVE_HINT_OES: number;
-}
-
-declare var OES_standard_derivatives: {
-    prototype: OES_standard_derivatives;
-    new(): OES_standard_derivatives;
-    readonly FRAGMENT_SHADER_DERIVATIVE_HINT_OES: number;
-}
-
-interface OES_texture_float {
-}
-
-declare var OES_texture_float: {
-    prototype: OES_texture_float;
-    new(): OES_texture_float;
-}
-
-interface OES_texture_float_linear {
-}
-
-declare var OES_texture_float_linear: {
-    prototype: OES_texture_float_linear;
-    new(): OES_texture_float_linear;
-}
-
-interface OfflineAudioCompletionEvent extends Event {
-    readonly renderedBuffer: AudioBuffer;
-}
-
-declare var OfflineAudioCompletionEvent: {
-    prototype: OfflineAudioCompletionEvent;
-    new(): OfflineAudioCompletionEvent;
-}
-
-interface OfflineAudioContext extends AudioContext {
-    oncomplete: (this: this, ev: Event) => any;
-    startRendering(): PromiseLike<AudioBuffer>;
-    addEventListener(type: "complete", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var OfflineAudioContext: {
-    prototype: OfflineAudioContext;
-    new(numberOfChannels: number, length: number, sampleRate: number): OfflineAudioContext;
-}
-
-interface OscillatorNode extends AudioNode {
-    readonly detune: AudioParam;
-    readonly frequency: AudioParam;
-    onended: (this: this, ev: MediaStreamErrorEvent) => any;
-    type: string;
-    setPeriodicWave(periodicWave: PeriodicWave): void;
-    start(when?: number): void;
-    stop(when?: number): void;
-    addEventListener(type: "ended", listener: (this: this, ev: MediaStreamErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var OscillatorNode: {
-    prototype: OscillatorNode;
-    new(): OscillatorNode;
-}
-
-interface OverflowEvent extends UIEvent {
-    readonly horizontalOverflow: boolean;
-    readonly orient: number;
-    readonly verticalOverflow: boolean;
-    readonly BOTH: number;
-    readonly HORIZONTAL: number;
-    readonly VERTICAL: number;
-}
-
-declare var OverflowEvent: {
-    prototype: OverflowEvent;
-    new(): OverflowEvent;
-    readonly BOTH: number;
-    readonly HORIZONTAL: number;
-    readonly VERTICAL: number;
-}
-
-interface PageTransitionEvent extends Event {
-    readonly persisted: boolean;
-}
-
-declare var PageTransitionEvent: {
-    prototype: PageTransitionEvent;
-    new(): PageTransitionEvent;
-}
-
-interface PannerNode extends AudioNode {
-    coneInnerAngle: number;
-    coneOuterAngle: number;
-    coneOuterGain: number;
-    distanceModel: string;
-    maxDistance: number;
-    panningModel: string;
-    refDistance: number;
-    rolloffFactor: number;
-    setOrientation(x: number, y: number, z: number): void;
-    setPosition(x: number, y: number, z: number): void;
-    setVelocity(x: number, y: number, z: number): void;
-}
-
-declare var PannerNode: {
-    prototype: PannerNode;
-    new(): PannerNode;
-}
-
-interface PerfWidgetExternal {
-    readonly activeNetworkRequestCount: number;
-    readonly averageFrameTime: number;
-    readonly averagePaintTime: number;
-    readonly extraInformationEnabled: boolean;
-    readonly independentRenderingEnabled: boolean;
-    readonly irDisablingContentString: string;
-    readonly irStatusAvailable: boolean;
-    readonly maxCpuSpeed: number;
-    readonly paintRequestsPerSecond: number;
-    readonly performanceCounter: number;
-    readonly performanceCounterFrequency: number;
-    addEventListener(eventType: string, callback: Function): void;
-    getMemoryUsage(): number;
-    getProcessCpuUsage(): number;
-    getRecentCpuUsage(last: number | null): any;
-    getRecentFrames(last: number | null): any;
-    getRecentMemoryUsage(last: number | null): any;
-    getRecentPaintRequests(last: number | null): any;
-    removeEventListener(eventType: string, callback: Function): void;
-    repositionWindow(x: number, y: number): void;
-    resizeWindow(width: number, height: number): void;
-}
-
-declare var PerfWidgetExternal: {
-    prototype: PerfWidgetExternal;
-    new(): PerfWidgetExternal;
-}
-
-interface Performance {
-    readonly navigation: PerformanceNavigation;
-    readonly timing: PerformanceTiming;
-    clearMarks(markName?: string): void;
-    clearMeasures(measureName?: string): void;
-    clearResourceTimings(): void;
-    getEntries(): any;
-    getEntriesByName(name: string, entryType?: string): any;
-    getEntriesByType(entryType: string): any;
-    getMarks(markName?: string): any;
-    getMeasures(measureName?: string): any;
-    mark(markName: string): void;
-    measure(measureName: string, startMarkName?: string, endMarkName?: string): void;
-    now(): number;
-    setResourceTimingBufferSize(maxSize: number): void;
-    toJSON(): any;
-}
-
-declare var Performance: {
-    prototype: Performance;
-    new(): Performance;
-}
-
-interface PerformanceEntry {
-    readonly duration: number;
-    readonly entryType: string;
-    readonly name: string;
-    readonly startTime: number;
-}
-
-declare var PerformanceEntry: {
-    prototype: PerformanceEntry;
-    new(): PerformanceEntry;
-}
-
-interface PerformanceMark extends PerformanceEntry {
-}
-
-declare var PerformanceMark: {
-    prototype: PerformanceMark;
-    new(): PerformanceMark;
-}
-
-interface PerformanceMeasure extends PerformanceEntry {
-}
-
-declare var PerformanceMeasure: {
-    prototype: PerformanceMeasure;
-    new(): PerformanceMeasure;
-}
-
-interface PerformanceNavigation {
-    readonly redirectCount: number;
-    readonly type: number;
-    toJSON(): any;
-    readonly TYPE_BACK_FORWARD: number;
-    readonly TYPE_NAVIGATE: number;
-    readonly TYPE_RELOAD: number;
-    readonly TYPE_RESERVED: number;
-}
-
-declare var PerformanceNavigation: {
-    prototype: PerformanceNavigation;
-    new(): PerformanceNavigation;
-    readonly TYPE_BACK_FORWARD: number;
-    readonly TYPE_NAVIGATE: number;
-    readonly TYPE_RELOAD: number;
-    readonly TYPE_RESERVED: number;
-}
-
-interface PerformanceNavigationTiming extends PerformanceEntry {
-    readonly connectEnd: number;
-    readonly connectStart: number;
-    readonly domComplete: number;
-    readonly domContentLoadedEventEnd: number;
-    readonly domContentLoadedEventStart: number;
-    readonly domInteractive: number;
-    readonly domLoading: number;
-    readonly domainLookupEnd: number;
-    readonly domainLookupStart: number;
-    readonly fetchStart: number;
-    readonly loadEventEnd: number;
-    readonly loadEventStart: number;
-    readonly navigationStart: number;
-    readonly redirectCount: number;
-    readonly redirectEnd: number;
-    readonly redirectStart: number;
-    readonly requestStart: number;
-    readonly responseEnd: number;
-    readonly responseStart: number;
-    readonly type: string;
-    readonly unloadEventEnd: number;
-    readonly unloadEventStart: number;
-}
-
-declare var PerformanceNavigationTiming: {
-    prototype: PerformanceNavigationTiming;
-    new(): PerformanceNavigationTiming;
-}
-
-interface PerformanceResourceTiming extends PerformanceEntry {
-    readonly connectEnd: number;
-    readonly connectStart: number;
-    readonly domainLookupEnd: number;
-    readonly domainLookupStart: number;
-    readonly fetchStart: number;
-    readonly initiatorType: string;
-    readonly redirectEnd: number;
-    readonly redirectStart: number;
-    readonly requestStart: number;
-    readonly responseEnd: number;
-    readonly responseStart: number;
-}
-
-declare var PerformanceResourceTiming: {
-    prototype: PerformanceResourceTiming;
-    new(): PerformanceResourceTiming;
-}
-
-interface PerformanceTiming {
-    readonly connectEnd: number;
-    readonly connectStart: number;
-    readonly domComplete: number;
-    readonly domContentLoadedEventEnd: number;
-    readonly domContentLoadedEventStart: number;
-    readonly domInteractive: number;
-    readonly domLoading: number;
-    readonly domainLookupEnd: number;
-    readonly domainLookupStart: number;
-    readonly fetchStart: number;
-    readonly loadEventEnd: number;
-    readonly loadEventStart: number;
-    readonly msFirstPaint: number;
-    readonly navigationStart: number;
-    readonly redirectEnd: number;
-    readonly redirectStart: number;
-    readonly requestStart: number;
-    readonly responseEnd: number;
-    readonly responseStart: number;
-    readonly unloadEventEnd: number;
-    readonly unloadEventStart: number;
-    readonly secureConnectionStart: number;
-    toJSON(): any;
-}
-
-declare var PerformanceTiming: {
-    prototype: PerformanceTiming;
-    new(): PerformanceTiming;
-}
-
-interface PeriodicWave {
-}
-
-declare var PeriodicWave: {
-    prototype: PeriodicWave;
-    new(): PeriodicWave;
-}
-
-interface PermissionRequest extends DeferredPermissionRequest {
-    readonly state: string;
-    defer(): void;
-}
-
-declare var PermissionRequest: {
-    prototype: PermissionRequest;
-    new(): PermissionRequest;
-}
-
-interface PermissionRequestedEvent extends Event {
-    readonly permissionRequest: PermissionRequest;
-}
-
-declare var PermissionRequestedEvent: {
-    prototype: PermissionRequestedEvent;
-    new(): PermissionRequestedEvent;
-}
-
-interface Plugin {
-    readonly description: string;
-    readonly filename: string;
-    readonly length: number;
-    readonly name: string;
-    readonly version: string;
-    item(index: number): MimeType;
-    namedItem(type: string): MimeType;
-    [index: number]: MimeType;
-}
-
-declare var Plugin: {
-    prototype: Plugin;
-    new(): Plugin;
-}
-
-interface PluginArray {
-    readonly length: number;
-    item(index: number): Plugin;
-    namedItem(name: string): Plugin;
-    refresh(reload?: boolean): void;
-    [index: number]: Plugin;
-}
-
-declare var PluginArray: {
-    prototype: PluginArray;
-    new(): PluginArray;
-}
-
-interface PointerEvent extends MouseEvent {
-    readonly currentPoint: any;
-    readonly height: number;
-    readonly hwTimestamp: number;
-    readonly intermediatePoints: any;
-    readonly isPrimary: boolean;
-    readonly pointerId: number;
-    readonly pointerType: any;
-    readonly pressure: number;
-    readonly rotation: number;
-    readonly tiltX: number;
-    readonly tiltY: number;
-    readonly width: number;
-    getCurrentPoint(element: Element): void;
-    getIntermediatePoints(element: Element): void;
-    initPointerEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, ctrlKeyArg: boolean, altKeyArg: boolean, shiftKeyArg: boolean, metaKeyArg: boolean, buttonArg: number, relatedTargetArg: EventTarget, offsetXArg: number, offsetYArg: number, widthArg: number, heightArg: number, pressure: number, rotation: number, tiltX: number, tiltY: number, pointerIdArg: number, pointerType: any, hwTimestampArg: number, isPrimary: boolean): void;
-}
-
-declare var PointerEvent: {
-    prototype: PointerEvent;
-    new(typeArg: string, eventInitDict?: PointerEventInit): PointerEvent;
-}
-
-interface PopStateEvent extends Event {
-    readonly state: any;
-    initPopStateEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, stateArg: any): void;
-}
-
-declare var PopStateEvent: {
-    prototype: PopStateEvent;
-    new(): PopStateEvent;
-}
-
-interface Position {
-    readonly coords: Coordinates;
-    readonly timestamp: number;
-}
-
-declare var Position: {
-    prototype: Position;
-    new(): Position;
-}
-
-interface PositionError {
-    readonly code: number;
-    readonly message: string;
-    toString(): string;
-    readonly PERMISSION_DENIED: number;
-    readonly POSITION_UNAVAILABLE: number;
-    readonly TIMEOUT: number;
-}
-
-declare var PositionError: {
-    prototype: PositionError;
-    new(): PositionError;
-    readonly PERMISSION_DENIED: number;
-    readonly POSITION_UNAVAILABLE: number;
-    readonly TIMEOUT: number;
-}
-
-interface ProcessingInstruction extends CharacterData {
-    readonly target: string;
-}
-
-declare var ProcessingInstruction: {
-    prototype: ProcessingInstruction;
-    new(): ProcessingInstruction;
-}
-
-interface ProgressEvent extends Event {
-    readonly lengthComputable: boolean;
-    readonly loaded: number;
-    readonly total: number;
-    initProgressEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, lengthComputableArg: boolean, loadedArg: number, totalArg: number): void;
-}
-
-declare var ProgressEvent: {
-    prototype: ProgressEvent;
-    new(type: string, eventInitDict?: ProgressEventInit): ProgressEvent;
-}
-
-interface RTCDTMFToneChangeEvent extends Event {
-    readonly tone: string;
-}
-
-declare var RTCDTMFToneChangeEvent: {
-    prototype: RTCDTMFToneChangeEvent;
-    new(type: string, eventInitDict: RTCDTMFToneChangeEventInit): RTCDTMFToneChangeEvent;
-}
-
-interface RTCDtlsTransport extends RTCStatsProvider {
-    ondtlsstatechange: ((this: this, ev: RTCDtlsTransportStateChangedEvent) => any) | null;
-    onerror: ((this: this, ev: ErrorEvent) => any) | null;
-    readonly state: string;
-    readonly transport: RTCIceTransport;
-    getLocalParameters(): RTCDtlsParameters;
-    getRemoteCertificates(): ArrayBuffer[];
-    getRemoteParameters(): RTCDtlsParameters | null;
-    start(remoteParameters: RTCDtlsParameters): void;
-    stop(): void;
-    addEventListener(type: "dtlsstatechange", listener: (this: this, ev: RTCDtlsTransportStateChangedEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var RTCDtlsTransport: {
-    prototype: RTCDtlsTransport;
-    new(transport: RTCIceTransport): RTCDtlsTransport;
-}
-
-interface RTCDtlsTransportStateChangedEvent extends Event {
-    readonly state: string;
-}
-
-declare var RTCDtlsTransportStateChangedEvent: {
-    prototype: RTCDtlsTransportStateChangedEvent;
-    new(): RTCDtlsTransportStateChangedEvent;
-}
-
-interface RTCDtmfSender extends EventTarget {
-    readonly canInsertDTMF: boolean;
-    readonly duration: number;
-    readonly interToneGap: number;
-    ontonechange: (this: this, ev: RTCDTMFToneChangeEvent) => any;
-    readonly sender: RTCRtpSender;
-    readonly toneBuffer: string;
-    insertDTMF(tones: string, duration?: number, interToneGap?: number): void;
-    addEventListener(type: "tonechange", listener: (this: this, ev: RTCDTMFToneChangeEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var RTCDtmfSender: {
-    prototype: RTCDtmfSender;
-    new(sender: RTCRtpSender): RTCDtmfSender;
-}
-
-interface RTCIceCandidatePairChangedEvent extends Event {
-    readonly pair: RTCIceCandidatePair;
-}
-
-declare var RTCIceCandidatePairChangedEvent: {
-    prototype: RTCIceCandidatePairChangedEvent;
-    new(): RTCIceCandidatePairChangedEvent;
-}
-
-interface RTCIceGatherer extends RTCStatsProvider {
-    readonly component: string;
-    onerror: ((this: this, ev: ErrorEvent) => any) | null;
-    onlocalcandidate: ((this: this, ev: RTCIceGathererEvent) => any) | null;
-    createAssociatedGatherer(): RTCIceGatherer;
-    getLocalCandidates(): RTCIceCandidate[];
-    getLocalParameters(): RTCIceParameters;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "localcandidate", listener: (this: this, ev: RTCIceGathererEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var RTCIceGatherer: {
-    prototype: RTCIceGatherer;
-    new(options: RTCIceGatherOptions): RTCIceGatherer;
-}
-
-interface RTCIceGathererEvent extends Event {
-    readonly candidate: RTCIceCandidate | RTCIceCandidateComplete;
-}
-
-declare var RTCIceGathererEvent: {
-    prototype: RTCIceGathererEvent;
-    new(): RTCIceGathererEvent;
-}
-
-interface RTCIceTransport extends RTCStatsProvider {
-    readonly component: string;
-    readonly iceGatherer: RTCIceGatherer | null;
-    oncandidatepairchange: ((this: this, ev: RTCIceCandidatePairChangedEvent) => any) | null;
-    onicestatechange: ((this: this, ev: RTCIceTransportStateChangedEvent) => any) | null;
-    readonly role: string;
-    readonly state: string;
-    addRemoteCandidate(remoteCandidate: RTCIceCandidate | RTCIceCandidateComplete): void;
-    createAssociatedTransport(): RTCIceTransport;
-    getNominatedCandidatePair(): RTCIceCandidatePair | null;
-    getRemoteCandidates(): RTCIceCandidate[];
-    getRemoteParameters(): RTCIceParameters | null;
-    setRemoteCandidates(remoteCandidates: RTCIceCandidate[]): void;
-    start(gatherer: RTCIceGatherer, remoteParameters: RTCIceParameters, role?: string): void;
-    stop(): void;
-    addEventListener(type: "candidatepairchange", listener: (this: this, ev: RTCIceCandidatePairChangedEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "icestatechange", listener: (this: this, ev: RTCIceTransportStateChangedEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var RTCIceTransport: {
-    prototype: RTCIceTransport;
-    new(): RTCIceTransport;
-}
-
-interface RTCIceTransportStateChangedEvent extends Event {
-    readonly state: string;
-}
-
-declare var RTCIceTransportStateChangedEvent: {
-    prototype: RTCIceTransportStateChangedEvent;
-    new(): RTCIceTransportStateChangedEvent;
-}
-
-interface RTCRtpReceiver extends RTCStatsProvider {
-    onerror: ((this: this, ev: ErrorEvent) => any) | null;
-    readonly rtcpTransport: RTCDtlsTransport;
-    readonly track: MediaStreamTrack | null;
-    readonly transport: RTCDtlsTransport | RTCSrtpSdesTransport;
-    getContributingSources(): RTCRtpContributingSource[];
-    receive(parameters: RTCRtpParameters): void;
-    requestSendCSRC(csrc: number): void;
-    setTransport(transport: RTCDtlsTransport | RTCSrtpSdesTransport, rtcpTransport?: RTCDtlsTransport): void;
-    stop(): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var RTCRtpReceiver: {
-    prototype: RTCRtpReceiver;
-    new(transport: RTCDtlsTransport | RTCSrtpSdesTransport, kind: string, rtcpTransport?: RTCDtlsTransport): RTCRtpReceiver;
-    getCapabilities(kind?: string): RTCRtpCapabilities;
-}
-
-interface RTCRtpSender extends RTCStatsProvider {
-    onerror: ((this: this, ev: ErrorEvent) => any) | null;
-    onssrcconflict: ((this: this, ev: RTCSsrcConflictEvent) => any) | null;
-    readonly rtcpTransport: RTCDtlsTransport;
-    readonly track: MediaStreamTrack;
-    readonly transport: RTCDtlsTransport | RTCSrtpSdesTransport;
-    send(parameters: RTCRtpParameters): void;
-    setTrack(track: MediaStreamTrack): void;
-    setTransport(transport: RTCDtlsTransport | RTCSrtpSdesTransport, rtcpTransport?: RTCDtlsTransport): void;
-    stop(): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ssrcconflict", listener: (this: this, ev: RTCSsrcConflictEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var RTCRtpSender: {
-    prototype: RTCRtpSender;
-    new(track: MediaStreamTrack, transport: RTCDtlsTransport | RTCSrtpSdesTransport, rtcpTransport?: RTCDtlsTransport): RTCRtpSender;
-    getCapabilities(kind?: string): RTCRtpCapabilities;
-}
-
-interface RTCSrtpSdesTransport extends EventTarget {
-    onerror: ((this: this, ev: ErrorEvent) => any) | null;
-    readonly transport: RTCIceTransport;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var RTCSrtpSdesTransport: {
-    prototype: RTCSrtpSdesTransport;
-    new(transport: RTCIceTransport, encryptParameters: RTCSrtpSdesParameters, decryptParameters: RTCSrtpSdesParameters): RTCSrtpSdesTransport;
-    getLocalParameters(): RTCSrtpSdesParameters[];
-}
-
-interface RTCSsrcConflictEvent extends Event {
-    readonly ssrc: number;
-}
-
-declare var RTCSsrcConflictEvent: {
-    prototype: RTCSsrcConflictEvent;
-    new(): RTCSsrcConflictEvent;
-}
-
-interface RTCStatsProvider extends EventTarget {
-    getStats(): PromiseLike<RTCStatsReport>;
-    msGetStats(): PromiseLike<RTCStatsReport>;
-}
-
-declare var RTCStatsProvider: {
-    prototype: RTCStatsProvider;
-    new(): RTCStatsProvider;
-}
-
-interface Range {
-    readonly collapsed: boolean;
-    readonly commonAncestorContainer: Node;
-    readonly endContainer: Node;
-    readonly endOffset: number;
-    readonly startContainer: Node;
-    readonly startOffset: number;
-    cloneContents(): DocumentFragment;
-    cloneRange(): Range;
-    collapse(toStart: boolean): void;
-    compareBoundaryPoints(how: number, sourceRange: Range): number;
-    createContextualFragment(fragment: string): DocumentFragment;
-    deleteContents(): void;
-    detach(): void;
-    expand(Unit: string): boolean;
-    extractContents(): DocumentFragment;
-    getBoundingClientRect(): ClientRect;
-    getClientRects(): ClientRectList;
-    insertNode(newNode: Node): void;
-    selectNode(refNode: Node): void;
-    selectNodeContents(refNode: Node): void;
-    setEnd(refNode: Node, offset: number): void;
-    setEndAfter(refNode: Node): void;
-    setEndBefore(refNode: Node): void;
-    setStart(refNode: Node, offset: number): void;
-    setStartAfter(refNode: Node): void;
-    setStartBefore(refNode: Node): void;
-    surroundContents(newParent: Node): void;
-    toString(): string;
-    readonly END_TO_END: number;
-    readonly END_TO_START: number;
-    readonly START_TO_END: number;
-    readonly START_TO_START: number;
-}
-
-declare var Range: {
-    prototype: Range;
-    new(): Range;
-    readonly END_TO_END: number;
-    readonly END_TO_START: number;
-    readonly START_TO_END: number;
-    readonly START_TO_START: number;
-}
-
-interface SVGAElement extends SVGElement, SVGStylable, SVGTransformable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGURIReference {
-    readonly target: SVGAnimatedString;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGAElement: {
-    prototype: SVGAElement;
-    new(): SVGAElement;
-}
-
-interface SVGAngle {
-    readonly unitType: number;
-    value: number;
-    valueAsString: string;
-    valueInSpecifiedUnits: number;
-    convertToSpecifiedUnits(unitType: number): void;
-    newValueSpecifiedUnits(unitType: number, valueInSpecifiedUnits: number): void;
-    readonly SVG_ANGLETYPE_DEG: number;
-    readonly SVG_ANGLETYPE_GRAD: number;
-    readonly SVG_ANGLETYPE_RAD: number;
-    readonly SVG_ANGLETYPE_UNKNOWN: number;
-    readonly SVG_ANGLETYPE_UNSPECIFIED: number;
-}
-
-declare var SVGAngle: {
-    prototype: SVGAngle;
-    new(): SVGAngle;
-    readonly SVG_ANGLETYPE_DEG: number;
-    readonly SVG_ANGLETYPE_GRAD: number;
-    readonly SVG_ANGLETYPE_RAD: number;
-    readonly SVG_ANGLETYPE_UNKNOWN: number;
-    readonly SVG_ANGLETYPE_UNSPECIFIED: number;
-}
-
-interface SVGAnimatedAngle {
-    readonly animVal: SVGAngle;
-    readonly baseVal: SVGAngle;
-}
-
-declare var SVGAnimatedAngle: {
-    prototype: SVGAnimatedAngle;
-    new(): SVGAnimatedAngle;
-}
-
-interface SVGAnimatedBoolean {
-    readonly animVal: boolean;
-    baseVal: boolean;
-}
-
-declare var SVGAnimatedBoolean: {
-    prototype: SVGAnimatedBoolean;
-    new(): SVGAnimatedBoolean;
-}
-
-interface SVGAnimatedEnumeration {
-    readonly animVal: number;
-    baseVal: number;
-}
-
-declare var SVGAnimatedEnumeration: {
-    prototype: SVGAnimatedEnumeration;
-    new(): SVGAnimatedEnumeration;
-}
-
-interface SVGAnimatedInteger {
-    readonly animVal: number;
-    baseVal: number;
-}
-
-declare var SVGAnimatedInteger: {
-    prototype: SVGAnimatedInteger;
-    new(): SVGAnimatedInteger;
-}
-
-interface SVGAnimatedLength {
-    readonly animVal: SVGLength;
-    readonly baseVal: SVGLength;
-}
-
-declare var SVGAnimatedLength: {
-    prototype: SVGAnimatedLength;
-    new(): SVGAnimatedLength;
-}
-
-interface SVGAnimatedLengthList {
-    readonly animVal: SVGLengthList;
-    readonly baseVal: SVGLengthList;
-}
-
-declare var SVGAnimatedLengthList: {
-    prototype: SVGAnimatedLengthList;
-    new(): SVGAnimatedLengthList;
-}
-
-interface SVGAnimatedNumber {
-    readonly animVal: number;
-    baseVal: number;
-}
-
-declare var SVGAnimatedNumber: {
-    prototype: SVGAnimatedNumber;
-    new(): SVGAnimatedNumber;
-}
-
-interface SVGAnimatedNumberList {
-    readonly animVal: SVGNumberList;
-    readonly baseVal: SVGNumberList;
-}
-
-declare var SVGAnimatedNumberList: {
-    prototype: SVGAnimatedNumberList;
-    new(): SVGAnimatedNumberList;
-}
-
-interface SVGAnimatedPreserveAspectRatio {
-    readonly animVal: SVGPreserveAspectRatio;
-    readonly baseVal: SVGPreserveAspectRatio;
-}
-
-declare var SVGAnimatedPreserveAspectRatio: {
-    prototype: SVGAnimatedPreserveAspectRatio;
-    new(): SVGAnimatedPreserveAspectRatio;
-}
-
-interface SVGAnimatedRect {
-    readonly animVal: SVGRect;
-    readonly baseVal: SVGRect;
-}
-
-declare var SVGAnimatedRect: {
-    prototype: SVGAnimatedRect;
-    new(): SVGAnimatedRect;
-}
-
-interface SVGAnimatedString {
-    readonly animVal: string;
-    baseVal: string;
-}
-
-declare var SVGAnimatedString: {
-    prototype: SVGAnimatedString;
-    new(): SVGAnimatedString;
-}
-
-interface SVGAnimatedTransformList {
-    readonly animVal: SVGTransformList;
-    readonly baseVal: SVGTransformList;
-}
-
-declare var SVGAnimatedTransformList: {
-    prototype: SVGAnimatedTransformList;
-    new(): SVGAnimatedTransformList;
-}
-
-interface SVGCircleElement extends SVGElement, SVGStylable, SVGTransformable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired {
-    readonly cx: SVGAnimatedLength;
-    readonly cy: SVGAnimatedLength;
-    readonly r: SVGAnimatedLength;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGCircleElement: {
-    prototype: SVGCircleElement;
-    new(): SVGCircleElement;
-}
-
-interface SVGClipPathElement extends SVGElement, SVGStylable, SVGTransformable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGUnitTypes {
-    readonly clipPathUnits: SVGAnimatedEnumeration;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGClipPathElement: {
-    prototype: SVGClipPathElement;
-    new(): SVGClipPathElement;
-}
-
-interface SVGComponentTransferFunctionElement extends SVGElement {
-    readonly amplitude: SVGAnimatedNumber;
-    readonly exponent: SVGAnimatedNumber;
-    readonly intercept: SVGAnimatedNumber;
-    readonly offset: SVGAnimatedNumber;
-    readonly slope: SVGAnimatedNumber;
-    readonly tableValues: SVGAnimatedNumberList;
-    readonly type: SVGAnimatedEnumeration;
-    readonly SVG_FECOMPONENTTRANSFER_TYPE_DISCRETE: number;
-    readonly SVG_FECOMPONENTTRANSFER_TYPE_GAMMA: number;
-    readonly SVG_FECOMPONENTTRANSFER_TYPE_IDENTITY: number;
-    readonly SVG_FECOMPONENTTRANSFER_TYPE_LINEAR: number;
-    readonly SVG_FECOMPONENTTRANSFER_TYPE_TABLE: number;
-    readonly SVG_FECOMPONENTTRANSFER_TYPE_UNKNOWN: number;
-}
-
-declare var SVGComponentTransferFunctionElement: {
-    prototype: SVGComponentTransferFunctionElement;
-    new(): SVGComponentTransferFunctionElement;
-    readonly SVG_FECOMPONENTTRANSFER_TYPE_DISCRETE: number;
-    readonly SVG_FECOMPONENTTRANSFER_TYPE_GAMMA: number;
-    readonly SVG_FECOMPONENTTRANSFER_TYPE_IDENTITY: number;
-    readonly SVG_FECOMPONENTTRANSFER_TYPE_LINEAR: number;
-    readonly SVG_FECOMPONENTTRANSFER_TYPE_TABLE: number;
-    readonly SVG_FECOMPONENTTRANSFER_TYPE_UNKNOWN: number;
-}
-
-interface SVGDefsElement extends SVGElement, SVGStylable, SVGTransformable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired {
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGDefsElement: {
-    prototype: SVGDefsElement;
-    new(): SVGDefsElement;
-}
-
-interface SVGDescElement extends SVGElement, SVGStylable, SVGLangSpace {
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGDescElement: {
-    prototype: SVGDescElement;
-    new(): SVGDescElement;
-}
-
-interface SVGElement extends Element {
-    onclick: (this: this, ev: MouseEvent) => any;
-    ondblclick: (this: this, ev: MouseEvent) => any;
-    onfocusin: (this: this, ev: FocusEvent) => any;
-    onfocusout: (this: this, ev: FocusEvent) => any;
-    onload: (this: this, ev: Event) => any;
-    onmousedown: (this: this, ev: MouseEvent) => any;
-    onmousemove: (this: this, ev: MouseEvent) => any;
-    onmouseout: (this: this, ev: MouseEvent) => any;
-    onmouseover: (this: this, ev: MouseEvent) => any;
-    onmouseup: (this: this, ev: MouseEvent) => any;
-    readonly ownerSVGElement: SVGSVGElement;
-    readonly viewportElement: SVGElement;
-    xmlbase: string;
-    className: any;
-    addEventListener(type: "MSGestureChange", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureDoubleTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureEnd", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureHold", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGotPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSInertiaStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSLostPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerCancel", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerDown", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerEnter", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerLeave", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerMove", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOut", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOver", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerUp", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ariarequest", listener: (this: this, ev: AriaRequestEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "click", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "command", listener: (this: this, ev: CommandEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dblclick", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "focusin", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "focusout", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "gotpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "lostpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousedown", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousemove", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseout", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseover", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseup", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointercancel", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerdown", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerenter", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerleave", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointermove", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerout", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerover", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerup", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchcancel", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchend", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchmove", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchstart", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenerror", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "wheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGElement: {
-    prototype: SVGElement;
-    new(): SVGElement;
-}
-
-interface SVGElementInstance extends EventTarget {
-    readonly childNodes: SVGElementInstanceList;
-    readonly correspondingElement: SVGElement;
-    readonly correspondingUseElement: SVGUseElement;
-    readonly firstChild: SVGElementInstance;
-    readonly lastChild: SVGElementInstance;
-    readonly nextSibling: SVGElementInstance;
-    readonly parentNode: SVGElementInstance;
-    readonly previousSibling: SVGElementInstance;
-}
-
-declare var SVGElementInstance: {
-    prototype: SVGElementInstance;
-    new(): SVGElementInstance;
-}
-
-interface SVGElementInstanceList {
-    readonly length: number;
-    item(index: number): SVGElementInstance;
-}
-
-declare var SVGElementInstanceList: {
-    prototype: SVGElementInstanceList;
-    new(): SVGElementInstanceList;
-}
-
-interface SVGEllipseElement extends SVGElement, SVGStylable, SVGTransformable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired {
-    readonly cx: SVGAnimatedLength;
-    readonly cy: SVGAnimatedLength;
-    readonly rx: SVGAnimatedLength;
-    readonly ry: SVGAnimatedLength;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGEllipseElement: {
-    prototype: SVGEllipseElement;
-    new(): SVGEllipseElement;
-}
-
-interface SVGFEBlendElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
-    readonly in1: SVGAnimatedString;
-    readonly in2: SVGAnimatedString;
-    readonly mode: SVGAnimatedEnumeration;
-    readonly SVG_FEBLEND_MODE_COLOR: number;
-    readonly SVG_FEBLEND_MODE_COLOR_BURN: number;
-    readonly SVG_FEBLEND_MODE_COLOR_DODGE: number;
-    readonly SVG_FEBLEND_MODE_DARKEN: number;
-    readonly SVG_FEBLEND_MODE_DIFFERENCE: number;
-    readonly SVG_FEBLEND_MODE_EXCLUSION: number;
-    readonly SVG_FEBLEND_MODE_HARD_LIGHT: number;
-    readonly SVG_FEBLEND_MODE_HUE: number;
-    readonly SVG_FEBLEND_MODE_LIGHTEN: number;
-    readonly SVG_FEBLEND_MODE_LUMINOSITY: number;
-    readonly SVG_FEBLEND_MODE_MULTIPLY: number;
-    readonly SVG_FEBLEND_MODE_NORMAL: number;
-    readonly SVG_FEBLEND_MODE_OVERLAY: number;
-    readonly SVG_FEBLEND_MODE_SATURATION: number;
-    readonly SVG_FEBLEND_MODE_SCREEN: number;
-    readonly SVG_FEBLEND_MODE_SOFT_LIGHT: number;
-    readonly SVG_FEBLEND_MODE_UNKNOWN: number;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFEBlendElement: {
-    prototype: SVGFEBlendElement;
-    new(): SVGFEBlendElement;
-    readonly SVG_FEBLEND_MODE_COLOR: number;
-    readonly SVG_FEBLEND_MODE_COLOR_BURN: number;
-    readonly SVG_FEBLEND_MODE_COLOR_DODGE: number;
-    readonly SVG_FEBLEND_MODE_DARKEN: number;
-    readonly SVG_FEBLEND_MODE_DIFFERENCE: number;
-    readonly SVG_FEBLEND_MODE_EXCLUSION: number;
-    readonly SVG_FEBLEND_MODE_HARD_LIGHT: number;
-    readonly SVG_FEBLEND_MODE_HUE: number;
-    readonly SVG_FEBLEND_MODE_LIGHTEN: number;
-    readonly SVG_FEBLEND_MODE_LUMINOSITY: number;
-    readonly SVG_FEBLEND_MODE_MULTIPLY: number;
-    readonly SVG_FEBLEND_MODE_NORMAL: number;
-    readonly SVG_FEBLEND_MODE_OVERLAY: number;
-    readonly SVG_FEBLEND_MODE_SATURATION: number;
-    readonly SVG_FEBLEND_MODE_SCREEN: number;
-    readonly SVG_FEBLEND_MODE_SOFT_LIGHT: number;
-    readonly SVG_FEBLEND_MODE_UNKNOWN: number;
-}
-
-interface SVGFEColorMatrixElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
-    readonly in1: SVGAnimatedString;
-    readonly type: SVGAnimatedEnumeration;
-    readonly values: SVGAnimatedNumberList;
-    readonly SVG_FECOLORMATRIX_TYPE_HUEROTATE: number;
-    readonly SVG_FECOLORMATRIX_TYPE_LUMINANCETOALPHA: number;
-    readonly SVG_FECOLORMATRIX_TYPE_MATRIX: number;
-    readonly SVG_FECOLORMATRIX_TYPE_SATURATE: number;
-    readonly SVG_FECOLORMATRIX_TYPE_UNKNOWN: number;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFEColorMatrixElement: {
-    prototype: SVGFEColorMatrixElement;
-    new(): SVGFEColorMatrixElement;
-    readonly SVG_FECOLORMATRIX_TYPE_HUEROTATE: number;
-    readonly SVG_FECOLORMATRIX_TYPE_LUMINANCETOALPHA: number;
-    readonly SVG_FECOLORMATRIX_TYPE_MATRIX: number;
-    readonly SVG_FECOLORMATRIX_TYPE_SATURATE: number;
-    readonly SVG_FECOLORMATRIX_TYPE_UNKNOWN: number;
-}
-
-interface SVGFEComponentTransferElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
-    readonly in1: SVGAnimatedString;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFEComponentTransferElement: {
-    prototype: SVGFEComponentTransferElement;
-    new(): SVGFEComponentTransferElement;
-}
-
-interface SVGFECompositeElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
-    readonly in1: SVGAnimatedString;
-    readonly in2: SVGAnimatedString;
-    readonly k1: SVGAnimatedNumber;
-    readonly k2: SVGAnimatedNumber;
-    readonly k3: SVGAnimatedNumber;
-    readonly k4: SVGAnimatedNumber;
-    readonly operator: SVGAnimatedEnumeration;
-    readonly SVG_FECOMPOSITE_OPERATOR_ARITHMETIC: number;
-    readonly SVG_FECOMPOSITE_OPERATOR_ATOP: number;
-    readonly SVG_FECOMPOSITE_OPERATOR_IN: number;
-    readonly SVG_FECOMPOSITE_OPERATOR_OUT: number;
-    readonly SVG_FECOMPOSITE_OPERATOR_OVER: number;
-    readonly SVG_FECOMPOSITE_OPERATOR_UNKNOWN: number;
-    readonly SVG_FECOMPOSITE_OPERATOR_XOR: number;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFECompositeElement: {
-    prototype: SVGFECompositeElement;
-    new(): SVGFECompositeElement;
-    readonly SVG_FECOMPOSITE_OPERATOR_ARITHMETIC: number;
-    readonly SVG_FECOMPOSITE_OPERATOR_ATOP: number;
-    readonly SVG_FECOMPOSITE_OPERATOR_IN: number;
-    readonly SVG_FECOMPOSITE_OPERATOR_OUT: number;
-    readonly SVG_FECOMPOSITE_OPERATOR_OVER: number;
-    readonly SVG_FECOMPOSITE_OPERATOR_UNKNOWN: number;
-    readonly SVG_FECOMPOSITE_OPERATOR_XOR: number;
-}
-
-interface SVGFEConvolveMatrixElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
-    readonly bias: SVGAnimatedNumber;
-    readonly divisor: SVGAnimatedNumber;
-    readonly edgeMode: SVGAnimatedEnumeration;
-    readonly in1: SVGAnimatedString;
-    readonly kernelMatrix: SVGAnimatedNumberList;
-    readonly kernelUnitLengthX: SVGAnimatedNumber;
-    readonly kernelUnitLengthY: SVGAnimatedNumber;
-    readonly orderX: SVGAnimatedInteger;
-    readonly orderY: SVGAnimatedInteger;
-    readonly preserveAlpha: SVGAnimatedBoolean;
-    readonly targetX: SVGAnimatedInteger;
-    readonly targetY: SVGAnimatedInteger;
-    readonly SVG_EDGEMODE_DUPLICATE: number;
-    readonly SVG_EDGEMODE_NONE: number;
-    readonly SVG_EDGEMODE_UNKNOWN: number;
-    readonly SVG_EDGEMODE_WRAP: number;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFEConvolveMatrixElement: {
-    prototype: SVGFEConvolveMatrixElement;
-    new(): SVGFEConvolveMatrixElement;
-    readonly SVG_EDGEMODE_DUPLICATE: number;
-    readonly SVG_EDGEMODE_NONE: number;
-    readonly SVG_EDGEMODE_UNKNOWN: number;
-    readonly SVG_EDGEMODE_WRAP: number;
-}
-
-interface SVGFEDiffuseLightingElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
-    readonly diffuseConstant: SVGAnimatedNumber;
-    readonly in1: SVGAnimatedString;
-    readonly kernelUnitLengthX: SVGAnimatedNumber;
-    readonly kernelUnitLengthY: SVGAnimatedNumber;
-    readonly surfaceScale: SVGAnimatedNumber;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFEDiffuseLightingElement: {
-    prototype: SVGFEDiffuseLightingElement;
-    new(): SVGFEDiffuseLightingElement;
-}
-
-interface SVGFEDisplacementMapElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
-    readonly in1: SVGAnimatedString;
-    readonly in2: SVGAnimatedString;
-    readonly scale: SVGAnimatedNumber;
-    readonly xChannelSelector: SVGAnimatedEnumeration;
-    readonly yChannelSelector: SVGAnimatedEnumeration;
-    readonly SVG_CHANNEL_A: number;
-    readonly SVG_CHANNEL_B: number;
-    readonly SVG_CHANNEL_G: number;
-    readonly SVG_CHANNEL_R: number;
-    readonly SVG_CHANNEL_UNKNOWN: number;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFEDisplacementMapElement: {
-    prototype: SVGFEDisplacementMapElement;
-    new(): SVGFEDisplacementMapElement;
-    readonly SVG_CHANNEL_A: number;
-    readonly SVG_CHANNEL_B: number;
-    readonly SVG_CHANNEL_G: number;
-    readonly SVG_CHANNEL_R: number;
-    readonly SVG_CHANNEL_UNKNOWN: number;
-}
-
-interface SVGFEDistantLightElement extends SVGElement {
-    readonly azimuth: SVGAnimatedNumber;
-    readonly elevation: SVGAnimatedNumber;
-}
-
-declare var SVGFEDistantLightElement: {
-    prototype: SVGFEDistantLightElement;
-    new(): SVGFEDistantLightElement;
-}
-
-interface SVGFEFloodElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFEFloodElement: {
-    prototype: SVGFEFloodElement;
-    new(): SVGFEFloodElement;
-}
-
-interface SVGFEFuncAElement extends SVGComponentTransferFunctionElement {
-}
-
-declare var SVGFEFuncAElement: {
-    prototype: SVGFEFuncAElement;
-    new(): SVGFEFuncAElement;
-}
-
-interface SVGFEFuncBElement extends SVGComponentTransferFunctionElement {
-}
-
-declare var SVGFEFuncBElement: {
-    prototype: SVGFEFuncBElement;
-    new(): SVGFEFuncBElement;
-}
-
-interface SVGFEFuncGElement extends SVGComponentTransferFunctionElement {
-}
-
-declare var SVGFEFuncGElement: {
-    prototype: SVGFEFuncGElement;
-    new(): SVGFEFuncGElement;
-}
-
-interface SVGFEFuncRElement extends SVGComponentTransferFunctionElement {
-}
-
-declare var SVGFEFuncRElement: {
-    prototype: SVGFEFuncRElement;
-    new(): SVGFEFuncRElement;
-}
-
-interface SVGFEGaussianBlurElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
-    readonly in1: SVGAnimatedString;
-    readonly stdDeviationX: SVGAnimatedNumber;
-    readonly stdDeviationY: SVGAnimatedNumber;
-    setStdDeviation(stdDeviationX: number, stdDeviationY: number): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFEGaussianBlurElement: {
-    prototype: SVGFEGaussianBlurElement;
-    new(): SVGFEGaussianBlurElement;
-}
-
-interface SVGFEImageElement extends SVGElement, SVGFilterPrimitiveStandardAttributes, SVGLangSpace, SVGURIReference, SVGExternalResourcesRequired {
-    readonly preserveAspectRatio: SVGAnimatedPreserveAspectRatio;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFEImageElement: {
-    prototype: SVGFEImageElement;
-    new(): SVGFEImageElement;
-}
-
-interface SVGFEMergeElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFEMergeElement: {
-    prototype: SVGFEMergeElement;
-    new(): SVGFEMergeElement;
-}
-
-interface SVGFEMergeNodeElement extends SVGElement {
-    readonly in1: SVGAnimatedString;
-}
-
-declare var SVGFEMergeNodeElement: {
-    prototype: SVGFEMergeNodeElement;
-    new(): SVGFEMergeNodeElement;
-}
-
-interface SVGFEMorphologyElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
-    readonly in1: SVGAnimatedString;
-    readonly operator: SVGAnimatedEnumeration;
-    readonly radiusX: SVGAnimatedNumber;
-    readonly radiusY: SVGAnimatedNumber;
-    readonly SVG_MORPHOLOGY_OPERATOR_DILATE: number;
-    readonly SVG_MORPHOLOGY_OPERATOR_ERODE: number;
-    readonly SVG_MORPHOLOGY_OPERATOR_UNKNOWN: number;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFEMorphologyElement: {
-    prototype: SVGFEMorphologyElement;
-    new(): SVGFEMorphologyElement;
-    readonly SVG_MORPHOLOGY_OPERATOR_DILATE: number;
-    readonly SVG_MORPHOLOGY_OPERATOR_ERODE: number;
-    readonly SVG_MORPHOLOGY_OPERATOR_UNKNOWN: number;
-}
-
-interface SVGFEOffsetElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
-    readonly dx: SVGAnimatedNumber;
-    readonly dy: SVGAnimatedNumber;
-    readonly in1: SVGAnimatedString;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFEOffsetElement: {
-    prototype: SVGFEOffsetElement;
-    new(): SVGFEOffsetElement;
-}
-
-interface SVGFEPointLightElement extends SVGElement {
-    readonly x: SVGAnimatedNumber;
-    readonly y: SVGAnimatedNumber;
-    readonly z: SVGAnimatedNumber;
-}
-
-declare var SVGFEPointLightElement: {
-    prototype: SVGFEPointLightElement;
-    new(): SVGFEPointLightElement;
-}
-
-interface SVGFESpecularLightingElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
-    readonly in1: SVGAnimatedString;
-    readonly kernelUnitLengthX: SVGAnimatedNumber;
-    readonly kernelUnitLengthY: SVGAnimatedNumber;
-    readonly specularConstant: SVGAnimatedNumber;
-    readonly specularExponent: SVGAnimatedNumber;
-    readonly surfaceScale: SVGAnimatedNumber;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFESpecularLightingElement: {
-    prototype: SVGFESpecularLightingElement;
-    new(): SVGFESpecularLightingElement;
-}
-
-interface SVGFESpotLightElement extends SVGElement {
-    readonly limitingConeAngle: SVGAnimatedNumber;
-    readonly pointsAtX: SVGAnimatedNumber;
-    readonly pointsAtY: SVGAnimatedNumber;
-    readonly pointsAtZ: SVGAnimatedNumber;
-    readonly specularExponent: SVGAnimatedNumber;
-    readonly x: SVGAnimatedNumber;
-    readonly y: SVGAnimatedNumber;
-    readonly z: SVGAnimatedNumber;
-}
-
-declare var SVGFESpotLightElement: {
-    prototype: SVGFESpotLightElement;
-    new(): SVGFESpotLightElement;
-}
-
-interface SVGFETileElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
-    readonly in1: SVGAnimatedString;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFETileElement: {
-    prototype: SVGFETileElement;
-    new(): SVGFETileElement;
-}
-
-interface SVGFETurbulenceElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
-    readonly baseFrequencyX: SVGAnimatedNumber;
-    readonly baseFrequencyY: SVGAnimatedNumber;
-    readonly numOctaves: SVGAnimatedInteger;
-    readonly seed: SVGAnimatedNumber;
-    readonly stitchTiles: SVGAnimatedEnumeration;
-    readonly type: SVGAnimatedEnumeration;
-    readonly SVG_STITCHTYPE_NOSTITCH: number;
-    readonly SVG_STITCHTYPE_STITCH: number;
-    readonly SVG_STITCHTYPE_UNKNOWN: number;
-    readonly SVG_TURBULENCE_TYPE_FRACTALNOISE: number;
-    readonly SVG_TURBULENCE_TYPE_TURBULENCE: number;
-    readonly SVG_TURBULENCE_TYPE_UNKNOWN: number;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFETurbulenceElement: {
-    prototype: SVGFETurbulenceElement;
-    new(): SVGFETurbulenceElement;
-    readonly SVG_STITCHTYPE_NOSTITCH: number;
-    readonly SVG_STITCHTYPE_STITCH: number;
-    readonly SVG_STITCHTYPE_UNKNOWN: number;
-    readonly SVG_TURBULENCE_TYPE_FRACTALNOISE: number;
-    readonly SVG_TURBULENCE_TYPE_TURBULENCE: number;
-    readonly SVG_TURBULENCE_TYPE_UNKNOWN: number;
-}
-
-interface SVGFilterElement extends SVGElement, SVGUnitTypes, SVGStylable, SVGLangSpace, SVGURIReference, SVGExternalResourcesRequired {
-    readonly filterResX: SVGAnimatedInteger;
-    readonly filterResY: SVGAnimatedInteger;
-    readonly filterUnits: SVGAnimatedEnumeration;
-    readonly height: SVGAnimatedLength;
-    readonly primitiveUnits: SVGAnimatedEnumeration;
-    readonly width: SVGAnimatedLength;
-    readonly x: SVGAnimatedLength;
-    readonly y: SVGAnimatedLength;
-    setFilterRes(filterResX: number, filterResY: number): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGFilterElement: {
-    prototype: SVGFilterElement;
-    new(): SVGFilterElement;
-}
-
-interface SVGForeignObjectElement extends SVGElement, SVGStylable, SVGTransformable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired {
-    readonly height: SVGAnimatedLength;
-    readonly width: SVGAnimatedLength;
-    readonly x: SVGAnimatedLength;
-    readonly y: SVGAnimatedLength;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGForeignObjectElement: {
-    prototype: SVGForeignObjectElement;
-    new(): SVGForeignObjectElement;
-}
-
-interface SVGGElement extends SVGElement, SVGStylable, SVGTransformable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired {
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGGElement: {
-    prototype: SVGGElement;
-    new(): SVGGElement;
-}
-
-interface SVGGradientElement extends SVGElement, SVGStylable, SVGExternalResourcesRequired, SVGURIReference, SVGUnitTypes {
-    readonly gradientTransform: SVGAnimatedTransformList;
-    readonly gradientUnits: SVGAnimatedEnumeration;
-    readonly spreadMethod: SVGAnimatedEnumeration;
-    readonly SVG_SPREADMETHOD_PAD: number;
-    readonly SVG_SPREADMETHOD_REFLECT: number;
-    readonly SVG_SPREADMETHOD_REPEAT: number;
-    readonly SVG_SPREADMETHOD_UNKNOWN: number;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGGradientElement: {
-    prototype: SVGGradientElement;
-    new(): SVGGradientElement;
-    readonly SVG_SPREADMETHOD_PAD: number;
-    readonly SVG_SPREADMETHOD_REFLECT: number;
-    readonly SVG_SPREADMETHOD_REPEAT: number;
-    readonly SVG_SPREADMETHOD_UNKNOWN: number;
-}
-
-interface SVGImageElement extends SVGElement, SVGStylable, SVGTransformable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGURIReference {
-    readonly height: SVGAnimatedLength;
-    readonly preserveAspectRatio: SVGAnimatedPreserveAspectRatio;
-    readonly width: SVGAnimatedLength;
-    readonly x: SVGAnimatedLength;
-    readonly y: SVGAnimatedLength;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGImageElement: {
-    prototype: SVGImageElement;
-    new(): SVGImageElement;
-}
-
-interface SVGLength {
-    readonly unitType: number;
-    value: number;
-    valueAsString: string;
-    valueInSpecifiedUnits: number;
-    convertToSpecifiedUnits(unitType: number): void;
-    newValueSpecifiedUnits(unitType: number, valueInSpecifiedUnits: number): void;
-    readonly SVG_LENGTHTYPE_CM: number;
-    readonly SVG_LENGTHTYPE_EMS: number;
-    readonly SVG_LENGTHTYPE_EXS: number;
-    readonly SVG_LENGTHTYPE_IN: number;
-    readonly SVG_LENGTHTYPE_MM: number;
-    readonly SVG_LENGTHTYPE_NUMBER: number;
-    readonly SVG_LENGTHTYPE_PC: number;
-    readonly SVG_LENGTHTYPE_PERCENTAGE: number;
-    readonly SVG_LENGTHTYPE_PT: number;
-    readonly SVG_LENGTHTYPE_PX: number;
-    readonly SVG_LENGTHTYPE_UNKNOWN: number;
-}
-
-declare var SVGLength: {
-    prototype: SVGLength;
-    new(): SVGLength;
-    readonly SVG_LENGTHTYPE_CM: number;
-    readonly SVG_LENGTHTYPE_EMS: number;
-    readonly SVG_LENGTHTYPE_EXS: number;
-    readonly SVG_LENGTHTYPE_IN: number;
-    readonly SVG_LENGTHTYPE_MM: number;
-    readonly SVG_LENGTHTYPE_NUMBER: number;
-    readonly SVG_LENGTHTYPE_PC: number;
-    readonly SVG_LENGTHTYPE_PERCENTAGE: number;
-    readonly SVG_LENGTHTYPE_PT: number;
-    readonly SVG_LENGTHTYPE_PX: number;
-    readonly SVG_LENGTHTYPE_UNKNOWN: number;
-}
-
-interface SVGLengthList {
-    readonly numberOfItems: number;
-    appendItem(newItem: SVGLength): SVGLength;
-    clear(): void;
-    getItem(index: number): SVGLength;
-    initialize(newItem: SVGLength): SVGLength;
-    insertItemBefore(newItem: SVGLength, index: number): SVGLength;
-    removeItem(index: number): SVGLength;
-    replaceItem(newItem: SVGLength, index: number): SVGLength;
-}
-
-declare var SVGLengthList: {
-    prototype: SVGLengthList;
-    new(): SVGLengthList;
-}
-
-interface SVGLineElement extends SVGElement, SVGStylable, SVGTransformable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired {
-    readonly x1: SVGAnimatedLength;
-    readonly x2: SVGAnimatedLength;
-    readonly y1: SVGAnimatedLength;
-    readonly y2: SVGAnimatedLength;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGLineElement: {
-    prototype: SVGLineElement;
-    new(): SVGLineElement;
-}
-
-interface SVGLinearGradientElement extends SVGGradientElement {
-    readonly x1: SVGAnimatedLength;
-    readonly x2: SVGAnimatedLength;
-    readonly y1: SVGAnimatedLength;
-    readonly y2: SVGAnimatedLength;
-}
-
-declare var SVGLinearGradientElement: {
-    prototype: SVGLinearGradientElement;
-    new(): SVGLinearGradientElement;
-}
-
-interface SVGMarkerElement extends SVGElement, SVGStylable, SVGLangSpace, SVGExternalResourcesRequired, SVGFitToViewBox {
-    readonly markerHeight: SVGAnimatedLength;
-    readonly markerUnits: SVGAnimatedEnumeration;
-    readonly markerWidth: SVGAnimatedLength;
-    readonly orientAngle: SVGAnimatedAngle;
-    readonly orientType: SVGAnimatedEnumeration;
-    readonly refX: SVGAnimatedLength;
-    readonly refY: SVGAnimatedLength;
-    setOrientToAngle(angle: SVGAngle): void;
-    setOrientToAuto(): void;
-    readonly SVG_MARKERUNITS_STROKEWIDTH: number;
-    readonly SVG_MARKERUNITS_UNKNOWN: number;
-    readonly SVG_MARKERUNITS_USERSPACEONUSE: number;
-    readonly SVG_MARKER_ORIENT_ANGLE: number;
-    readonly SVG_MARKER_ORIENT_AUTO: number;
-    readonly SVG_MARKER_ORIENT_UNKNOWN: number;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGMarkerElement: {
-    prototype: SVGMarkerElement;
-    new(): SVGMarkerElement;
-    readonly SVG_MARKERUNITS_STROKEWIDTH: number;
-    readonly SVG_MARKERUNITS_UNKNOWN: number;
-    readonly SVG_MARKERUNITS_USERSPACEONUSE: number;
-    readonly SVG_MARKER_ORIENT_ANGLE: number;
-    readonly SVG_MARKER_ORIENT_AUTO: number;
-    readonly SVG_MARKER_ORIENT_UNKNOWN: number;
-}
-
-interface SVGMaskElement extends SVGElement, SVGStylable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGUnitTypes {
-    readonly height: SVGAnimatedLength;
-    readonly maskContentUnits: SVGAnimatedEnumeration;
-    readonly maskUnits: SVGAnimatedEnumeration;
-    readonly width: SVGAnimatedLength;
-    readonly x: SVGAnimatedLength;
-    readonly y: SVGAnimatedLength;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGMaskElement: {
-    prototype: SVGMaskElement;
-    new(): SVGMaskElement;
-}
-
-interface SVGMatrix {
-    a: number;
-    b: number;
-    c: number;
-    d: number;
-    e: number;
-    f: number;
-    flipX(): SVGMatrix;
-    flipY(): SVGMatrix;
-    inverse(): SVGMatrix;
-    multiply(secondMatrix: SVGMatrix): SVGMatrix;
-    rotate(angle: number): SVGMatrix;
-    rotateFromVector(x: number, y: number): SVGMatrix;
-    scale(scaleFactor: number): SVGMatrix;
-    scaleNonUniform(scaleFactorX: number, scaleFactorY: number): SVGMatrix;
-    skewX(angle: number): SVGMatrix;
-    skewY(angle: number): SVGMatrix;
-    translate(x: number, y: number): SVGMatrix;
-}
-
-declare var SVGMatrix: {
-    prototype: SVGMatrix;
-    new(): SVGMatrix;
-}
-
-interface SVGMetadataElement extends SVGElement {
-}
-
-declare var SVGMetadataElement: {
-    prototype: SVGMetadataElement;
-    new(): SVGMetadataElement;
-}
-
-interface SVGNumber {
-    value: number;
-}
-
-declare var SVGNumber: {
-    prototype: SVGNumber;
-    new(): SVGNumber;
-}
-
-interface SVGNumberList {
-    readonly numberOfItems: number;
-    appendItem(newItem: SVGNumber): SVGNumber;
-    clear(): void;
-    getItem(index: number): SVGNumber;
-    initialize(newItem: SVGNumber): SVGNumber;
-    insertItemBefore(newItem: SVGNumber, index: number): SVGNumber;
-    removeItem(index: number): SVGNumber;
-    replaceItem(newItem: SVGNumber, index: number): SVGNumber;
-}
-
-declare var SVGNumberList: {
-    prototype: SVGNumberList;
-    new(): SVGNumberList;
-}
-
-interface SVGPathElement extends SVGElement, SVGStylable, SVGTransformable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGAnimatedPathData {
-    createSVGPathSegArcAbs(x: number, y: number, r1: number, r2: number, angle: number, largeArcFlag: boolean, sweepFlag: boolean): SVGPathSegArcAbs;
-    createSVGPathSegArcRel(x: number, y: number, r1: number, r2: number, angle: number, largeArcFlag: boolean, sweepFlag: boolean): SVGPathSegArcRel;
-    createSVGPathSegClosePath(): SVGPathSegClosePath;
-    createSVGPathSegCurvetoCubicAbs(x: number, y: number, x1: number, y1: number, x2: number, y2: number): SVGPathSegCurvetoCubicAbs;
-    createSVGPathSegCurvetoCubicRel(x: number, y: number, x1: number, y1: number, x2: number, y2: number): SVGPathSegCurvetoCubicRel;
-    createSVGPathSegCurvetoCubicSmoothAbs(x: number, y: number, x2: number, y2: number): SVGPathSegCurvetoCubicSmoothAbs;
-    createSVGPathSegCurvetoCubicSmoothRel(x: number, y: number, x2: number, y2: number): SVGPathSegCurvetoCubicSmoothRel;
-    createSVGPathSegCurvetoQuadraticAbs(x: number, y: number, x1: number, y1: number): SVGPathSegCurvetoQuadraticAbs;
-    createSVGPathSegCurvetoQuadraticRel(x: number, y: number, x1: number, y1: number): SVGPathSegCurvetoQuadraticRel;
-    createSVGPathSegCurvetoQuadraticSmoothAbs(x: number, y: number): SVGPathSegCurvetoQuadraticSmoothAbs;
-    createSVGPathSegCurvetoQuadraticSmoothRel(x: number, y: number): SVGPathSegCurvetoQuadraticSmoothRel;
-    createSVGPathSegLinetoAbs(x: number, y: number): SVGPathSegLinetoAbs;
-    createSVGPathSegLinetoHorizontalAbs(x: number): SVGPathSegLinetoHorizontalAbs;
-    createSVGPathSegLinetoHorizontalRel(x: number): SVGPathSegLinetoHorizontalRel;
-    createSVGPathSegLinetoRel(x: number, y: number): SVGPathSegLinetoRel;
-    createSVGPathSegLinetoVerticalAbs(y: number): SVGPathSegLinetoVerticalAbs;
-    createSVGPathSegLinetoVerticalRel(y: number): SVGPathSegLinetoVerticalRel;
-    createSVGPathSegMovetoAbs(x: number, y: number): SVGPathSegMovetoAbs;
-    createSVGPathSegMovetoRel(x: number, y: number): SVGPathSegMovetoRel;
-    getPathSegAtLength(distance: number): number;
-    getPointAtLength(distance: number): SVGPoint;
-    getTotalLength(): number;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGPathElement: {
-    prototype: SVGPathElement;
-    new(): SVGPathElement;
-}
-
-interface SVGPathSeg {
-    readonly pathSegType: number;
-    readonly pathSegTypeAsLetter: string;
-    readonly PATHSEG_ARC_ABS: number;
-    readonly PATHSEG_ARC_REL: number;
-    readonly PATHSEG_CLOSEPATH: number;
-    readonly PATHSEG_CURVETO_CUBIC_ABS: number;
-    readonly PATHSEG_CURVETO_CUBIC_REL: number;
-    readonly PATHSEG_CURVETO_CUBIC_SMOOTH_ABS: number;
-    readonly PATHSEG_CURVETO_CUBIC_SMOOTH_REL: number;
-    readonly PATHSEG_CURVETO_QUADRATIC_ABS: number;
-    readonly PATHSEG_CURVETO_QUADRATIC_REL: number;
-    readonly PATHSEG_CURVETO_QUADRATIC_SMOOTH_ABS: number;
-    readonly PATHSEG_CURVETO_QUADRATIC_SMOOTH_REL: number;
-    readonly PATHSEG_LINETO_ABS: number;
-    readonly PATHSEG_LINETO_HORIZONTAL_ABS: number;
-    readonly PATHSEG_LINETO_HORIZONTAL_REL: number;
-    readonly PATHSEG_LINETO_REL: number;
-    readonly PATHSEG_LINETO_VERTICAL_ABS: number;
-    readonly PATHSEG_LINETO_VERTICAL_REL: number;
-    readonly PATHSEG_MOVETO_ABS: number;
-    readonly PATHSEG_MOVETO_REL: number;
-    readonly PATHSEG_UNKNOWN: number;
-}
-
-declare var SVGPathSeg: {
-    prototype: SVGPathSeg;
-    new(): SVGPathSeg;
-    readonly PATHSEG_ARC_ABS: number;
-    readonly PATHSEG_ARC_REL: number;
-    readonly PATHSEG_CLOSEPATH: number;
-    readonly PATHSEG_CURVETO_CUBIC_ABS: number;
-    readonly PATHSEG_CURVETO_CUBIC_REL: number;
-    readonly PATHSEG_CURVETO_CUBIC_SMOOTH_ABS: number;
-    readonly PATHSEG_CURVETO_CUBIC_SMOOTH_REL: number;
-    readonly PATHSEG_CURVETO_QUADRATIC_ABS: number;
-    readonly PATHSEG_CURVETO_QUADRATIC_REL: number;
-    readonly PATHSEG_CURVETO_QUADRATIC_SMOOTH_ABS: number;
-    readonly PATHSEG_CURVETO_QUADRATIC_SMOOTH_REL: number;
-    readonly PATHSEG_LINETO_ABS: number;
-    readonly PATHSEG_LINETO_HORIZONTAL_ABS: number;
-    readonly PATHSEG_LINETO_HORIZONTAL_REL: number;
-    readonly PATHSEG_LINETO_REL: number;
-    readonly PATHSEG_LINETO_VERTICAL_ABS: number;
-    readonly PATHSEG_LINETO_VERTICAL_REL: number;
-    readonly PATHSEG_MOVETO_ABS: number;
-    readonly PATHSEG_MOVETO_REL: number;
-    readonly PATHSEG_UNKNOWN: number;
-}
-
-interface SVGPathSegArcAbs extends SVGPathSeg {
-    angle: number;
-    largeArcFlag: boolean;
-    r1: number;
-    r2: number;
-    sweepFlag: boolean;
-    x: number;
-    y: number;
-}
-
-declare var SVGPathSegArcAbs: {
-    prototype: SVGPathSegArcAbs;
-    new(): SVGPathSegArcAbs;
-}
-
-interface SVGPathSegArcRel extends SVGPathSeg {
-    angle: number;
-    largeArcFlag: boolean;
-    r1: number;
-    r2: number;
-    sweepFlag: boolean;
-    x: number;
-    y: number;
-}
-
-declare var SVGPathSegArcRel: {
-    prototype: SVGPathSegArcRel;
-    new(): SVGPathSegArcRel;
-}
-
-interface SVGPathSegClosePath extends SVGPathSeg {
-}
-
-declare var SVGPathSegClosePath: {
-    prototype: SVGPathSegClosePath;
-    new(): SVGPathSegClosePath;
-}
-
-interface SVGPathSegCurvetoCubicAbs extends SVGPathSeg {
-    x: number;
-    x1: number;
-    x2: number;
-    y: number;
-    y1: number;
-    y2: number;
-}
-
-declare var SVGPathSegCurvetoCubicAbs: {
-    prototype: SVGPathSegCurvetoCubicAbs;
-    new(): SVGPathSegCurvetoCubicAbs;
-}
-
-interface SVGPathSegCurvetoCubicRel extends SVGPathSeg {
-    x: number;
-    x1: number;
-    x2: number;
-    y: number;
-    y1: number;
-    y2: number;
-}
-
-declare var SVGPathSegCurvetoCubicRel: {
-    prototype: SVGPathSegCurvetoCubicRel;
-    new(): SVGPathSegCurvetoCubicRel;
-}
-
-interface SVGPathSegCurvetoCubicSmoothAbs extends SVGPathSeg {
-    x: number;
-    x2: number;
-    y: number;
-    y2: number;
-}
-
-declare var SVGPathSegCurvetoCubicSmoothAbs: {
-    prototype: SVGPathSegCurvetoCubicSmoothAbs;
-    new(): SVGPathSegCurvetoCubicSmoothAbs;
-}
-
-interface SVGPathSegCurvetoCubicSmoothRel extends SVGPathSeg {
-    x: number;
-    x2: number;
-    y: number;
-    y2: number;
-}
-
-declare var SVGPathSegCurvetoCubicSmoothRel: {
-    prototype: SVGPathSegCurvetoCubicSmoothRel;
-    new(): SVGPathSegCurvetoCubicSmoothRel;
-}
-
-interface SVGPathSegCurvetoQuadraticAbs extends SVGPathSeg {
-    x: number;
-    x1: number;
-    y: number;
-    y1: number;
-}
-
-declare var SVGPathSegCurvetoQuadraticAbs: {
-    prototype: SVGPathSegCurvetoQuadraticAbs;
-    new(): SVGPathSegCurvetoQuadraticAbs;
-}
-
-interface SVGPathSegCurvetoQuadraticRel extends SVGPathSeg {
-    x: number;
-    x1: number;
-    y: number;
-    y1: number;
-}
-
-declare var SVGPathSegCurvetoQuadraticRel: {
-    prototype: SVGPathSegCurvetoQuadraticRel;
-    new(): SVGPathSegCurvetoQuadraticRel;
-}
-
-interface SVGPathSegCurvetoQuadraticSmoothAbs extends SVGPathSeg {
-    x: number;
-    y: number;
-}
-
-declare var SVGPathSegCurvetoQuadraticSmoothAbs: {
-    prototype: SVGPathSegCurvetoQuadraticSmoothAbs;
-    new(): SVGPathSegCurvetoQuadraticSmoothAbs;
-}
-
-interface SVGPathSegCurvetoQuadraticSmoothRel extends SVGPathSeg {
-    x: number;
-    y: number;
-}
-
-declare var SVGPathSegCurvetoQuadraticSmoothRel: {
-    prototype: SVGPathSegCurvetoQuadraticSmoothRel;
-    new(): SVGPathSegCurvetoQuadraticSmoothRel;
-}
-
-interface SVGPathSegLinetoAbs extends SVGPathSeg {
-    x: number;
-    y: number;
-}
-
-declare var SVGPathSegLinetoAbs: {
-    prototype: SVGPathSegLinetoAbs;
-    new(): SVGPathSegLinetoAbs;
-}
-
-interface SVGPathSegLinetoHorizontalAbs extends SVGPathSeg {
-    x: number;
-}
-
-declare var SVGPathSegLinetoHorizontalAbs: {
-    prototype: SVGPathSegLinetoHorizontalAbs;
-    new(): SVGPathSegLinetoHorizontalAbs;
-}
-
-interface SVGPathSegLinetoHorizontalRel extends SVGPathSeg {
-    x: number;
-}
-
-declare var SVGPathSegLinetoHorizontalRel: {
-    prototype: SVGPathSegLinetoHorizontalRel;
-    new(): SVGPathSegLinetoHorizontalRel;
-}
-
-interface SVGPathSegLinetoRel extends SVGPathSeg {
-    x: number;
-    y: number;
-}
-
-declare var SVGPathSegLinetoRel: {
-    prototype: SVGPathSegLinetoRel;
-    new(): SVGPathSegLinetoRel;
-}
-
-interface SVGPathSegLinetoVerticalAbs extends SVGPathSeg {
-    y: number;
-}
-
-declare var SVGPathSegLinetoVerticalAbs: {
-    prototype: SVGPathSegLinetoVerticalAbs;
-    new(): SVGPathSegLinetoVerticalAbs;
-}
-
-interface SVGPathSegLinetoVerticalRel extends SVGPathSeg {
-    y: number;
-}
-
-declare var SVGPathSegLinetoVerticalRel: {
-    prototype: SVGPathSegLinetoVerticalRel;
-    new(): SVGPathSegLinetoVerticalRel;
-}
-
-interface SVGPathSegList {
-    readonly numberOfItems: number;
-    appendItem(newItem: SVGPathSeg): SVGPathSeg;
-    clear(): void;
-    getItem(index: number): SVGPathSeg;
-    initialize(newItem: SVGPathSeg): SVGPathSeg;
-    insertItemBefore(newItem: SVGPathSeg, index: number): SVGPathSeg;
-    removeItem(index: number): SVGPathSeg;
-    replaceItem(newItem: SVGPathSeg, index: number): SVGPathSeg;
-}
-
-declare var SVGPathSegList: {
-    prototype: SVGPathSegList;
-    new(): SVGPathSegList;
-}
-
-interface SVGPathSegMovetoAbs extends SVGPathSeg {
-    x: number;
-    y: number;
-}
-
-declare var SVGPathSegMovetoAbs: {
-    prototype: SVGPathSegMovetoAbs;
-    new(): SVGPathSegMovetoAbs;
-}
-
-interface SVGPathSegMovetoRel extends SVGPathSeg {
-    x: number;
-    y: number;
-}
-
-declare var SVGPathSegMovetoRel: {
-    prototype: SVGPathSegMovetoRel;
-    new(): SVGPathSegMovetoRel;
-}
-
-interface SVGPatternElement extends SVGElement, SVGStylable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGFitToViewBox, SVGURIReference, SVGUnitTypes {
-    readonly height: SVGAnimatedLength;
-    readonly patternContentUnits: SVGAnimatedEnumeration;
-    readonly patternTransform: SVGAnimatedTransformList;
-    readonly patternUnits: SVGAnimatedEnumeration;
-    readonly width: SVGAnimatedLength;
-    readonly x: SVGAnimatedLength;
-    readonly y: SVGAnimatedLength;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGPatternElement: {
-    prototype: SVGPatternElement;
-    new(): SVGPatternElement;
-}
-
-interface SVGPoint {
-    x: number;
-    y: number;
-    matrixTransform(matrix: SVGMatrix): SVGPoint;
-}
-
-declare var SVGPoint: {
-    prototype: SVGPoint;
-    new(): SVGPoint;
-}
-
-interface SVGPointList {
-    readonly numberOfItems: number;
-    appendItem(newItem: SVGPoint): SVGPoint;
-    clear(): void;
-    getItem(index: number): SVGPoint;
-    initialize(newItem: SVGPoint): SVGPoint;
-    insertItemBefore(newItem: SVGPoint, index: number): SVGPoint;
-    removeItem(index: number): SVGPoint;
-    replaceItem(newItem: SVGPoint, index: number): SVGPoint;
-}
-
-declare var SVGPointList: {
-    prototype: SVGPointList;
-    new(): SVGPointList;
-}
-
-interface SVGPolygonElement extends SVGElement, SVGStylable, SVGTransformable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGAnimatedPoints {
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGPolygonElement: {
-    prototype: SVGPolygonElement;
-    new(): SVGPolygonElement;
-}
-
-interface SVGPolylineElement extends SVGElement, SVGStylable, SVGTransformable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGAnimatedPoints {
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGPolylineElement: {
-    prototype: SVGPolylineElement;
-    new(): SVGPolylineElement;
-}
-
-interface SVGPreserveAspectRatio {
-    align: number;
-    meetOrSlice: number;
-    readonly SVG_MEETORSLICE_MEET: number;
-    readonly SVG_MEETORSLICE_SLICE: number;
-    readonly SVG_MEETORSLICE_UNKNOWN: number;
-    readonly SVG_PRESERVEASPECTRATIO_NONE: number;
-    readonly SVG_PRESERVEASPECTRATIO_UNKNOWN: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMAXYMAX: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMAXYMID: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMAXYMIN: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMIDYMAX: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMIDYMID: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMIDYMIN: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMINYMAX: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMINYMID: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMINYMIN: number;
-}
-
-declare var SVGPreserveAspectRatio: {
-    prototype: SVGPreserveAspectRatio;
-    new(): SVGPreserveAspectRatio;
-    readonly SVG_MEETORSLICE_MEET: number;
-    readonly SVG_MEETORSLICE_SLICE: number;
-    readonly SVG_MEETORSLICE_UNKNOWN: number;
-    readonly SVG_PRESERVEASPECTRATIO_NONE: number;
-    readonly SVG_PRESERVEASPECTRATIO_UNKNOWN: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMAXYMAX: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMAXYMID: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMAXYMIN: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMIDYMAX: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMIDYMID: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMIDYMIN: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMINYMAX: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMINYMID: number;
-    readonly SVG_PRESERVEASPECTRATIO_XMINYMIN: number;
-}
-
-interface SVGRadialGradientElement extends SVGGradientElement {
-    readonly cx: SVGAnimatedLength;
-    readonly cy: SVGAnimatedLength;
-    readonly fx: SVGAnimatedLength;
-    readonly fy: SVGAnimatedLength;
-    readonly r: SVGAnimatedLength;
-}
-
-declare var SVGRadialGradientElement: {
-    prototype: SVGRadialGradientElement;
-    new(): SVGRadialGradientElement;
-}
-
-interface SVGRect {
-    height: number;
-    width: number;
-    x: number;
-    y: number;
-}
-
-declare var SVGRect: {
-    prototype: SVGRect;
-    new(): SVGRect;
-}
-
-interface SVGRectElement extends SVGElement, SVGStylable, SVGTransformable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired {
-    readonly height: SVGAnimatedLength;
-    readonly rx: SVGAnimatedLength;
-    readonly ry: SVGAnimatedLength;
-    readonly width: SVGAnimatedLength;
-    readonly x: SVGAnimatedLength;
-    readonly y: SVGAnimatedLength;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGRectElement: {
-    prototype: SVGRectElement;
-    new(): SVGRectElement;
-}
-
-interface SVGSVGElement extends SVGElement, DocumentEvent, SVGLocatable, SVGTests, SVGStylable, SVGLangSpace, SVGExternalResourcesRequired, SVGFitToViewBox, SVGZoomAndPan {
-    contentScriptType: string;
-    contentStyleType: string;
-    currentScale: number;
-    readonly currentTranslate: SVGPoint;
-    readonly height: SVGAnimatedLength;
-    onabort: (this: this, ev: Event) => any;
-    onerror: (this: this, ev: Event) => any;
-    onresize: (this: this, ev: UIEvent) => any;
-    onscroll: (this: this, ev: UIEvent) => any;
-    onunload: (this: this, ev: Event) => any;
-    onzoom: (this: this, ev: SVGZoomEvent) => any;
-    readonly pixelUnitToMillimeterX: number;
-    readonly pixelUnitToMillimeterY: number;
-    readonly screenPixelToMillimeterX: number;
-    readonly screenPixelToMillimeterY: number;
-    readonly viewport: SVGRect;
-    readonly width: SVGAnimatedLength;
-    readonly x: SVGAnimatedLength;
-    readonly y: SVGAnimatedLength;
-    checkEnclosure(element: SVGElement, rect: SVGRect): boolean;
-    checkIntersection(element: SVGElement, rect: SVGRect): boolean;
-    createSVGAngle(): SVGAngle;
-    createSVGLength(): SVGLength;
-    createSVGMatrix(): SVGMatrix;
-    createSVGNumber(): SVGNumber;
-    createSVGPoint(): SVGPoint;
-    createSVGRect(): SVGRect;
-    createSVGTransform(): SVGTransform;
-    createSVGTransformFromMatrix(matrix: SVGMatrix): SVGTransform;
-    deselectAll(): void;
-    forceRedraw(): void;
-    getComputedStyle(elt: Element, pseudoElt?: string): CSSStyleDeclaration;
-    getCurrentTime(): number;
-    getElementById(elementId: string): Element;
-    getEnclosureList(rect: SVGRect, referenceElement: SVGElement): NodeListOf<SVGCircleElement | SVGEllipseElement | SVGImageElement | SVGLineElement | SVGPathElement | SVGPolygonElement | SVGPolylineElement | SVGRectElement | SVGTextElement | SVGUseElement>;
-    getIntersectionList(rect: SVGRect, referenceElement: SVGElement): NodeListOf<SVGCircleElement | SVGEllipseElement | SVGImageElement | SVGLineElement | SVGPathElement | SVGPolygonElement | SVGPolylineElement | SVGRectElement | SVGTextElement | SVGUseElement>;
-    pauseAnimations(): void;
-    setCurrentTime(seconds: number): void;
-    suspendRedraw(maxWaitMilliseconds: number): number;
-    unpauseAnimations(): void;
-    unsuspendRedraw(suspendHandleID: number): void;
-    unsuspendRedrawAll(): void;
-    addEventListener(type: "MSGestureChange", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureDoubleTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureEnd", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureHold", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGotPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSInertiaStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSLostPointerCapture", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerCancel", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerDown", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerEnter", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerLeave", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerMove", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOut", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOver", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerUp", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "SVGAbort", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "SVGError", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "SVGUnload", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "SVGZoom", listener: (this: this, ev: SVGZoomEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ariarequest", listener: (this: this, ev: AriaRequestEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "click", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "command", listener: (this: this, ev: CommandEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dblclick", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "focusin", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "focusout", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "gotpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "lostpointercapture", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousedown", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousemove", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseout", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseover", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseup", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointercancel", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerdown", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerenter", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerleave", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointermove", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerout", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerover", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerup", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "resize", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "scroll", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchcancel", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchend", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchmove", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "touchstart", listener: (this: this, ev: TouchEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "webkitfullscreenerror", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "wheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGSVGElement: {
-    prototype: SVGSVGElement;
-    new(): SVGSVGElement;
-}
-
-interface SVGScriptElement extends SVGElement, SVGExternalResourcesRequired, SVGURIReference {
-    type: string;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGScriptElement: {
-    prototype: SVGScriptElement;
-    new(): SVGScriptElement;
-}
-
-interface SVGStopElement extends SVGElement, SVGStylable {
-    readonly offset: SVGAnimatedNumber;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGStopElement: {
-    prototype: SVGStopElement;
-    new(): SVGStopElement;
-}
-
-interface SVGStringList {
-    readonly numberOfItems: number;
-    appendItem(newItem: string): string;
-    clear(): void;
-    getItem(index: number): string;
-    initialize(newItem: string): string;
-    insertItemBefore(newItem: string, index: number): string;
-    removeItem(index: number): string;
-    replaceItem(newItem: string, index: number): string;
-}
-
-declare var SVGStringList: {
-    prototype: SVGStringList;
-    new(): SVGStringList;
-}
-
-interface SVGStyleElement extends SVGElement, SVGLangSpace {
-    disabled: boolean;
-    media: string;
-    title: string;
-    type: string;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGStyleElement: {
-    prototype: SVGStyleElement;
-    new(): SVGStyleElement;
-}
-
-interface SVGSwitchElement extends SVGElement, SVGStylable, SVGTransformable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired {
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGSwitchElement: {
-    prototype: SVGSwitchElement;
-    new(): SVGSwitchElement;
-}
-
-interface SVGSymbolElement extends SVGElement, SVGStylable, SVGLangSpace, SVGExternalResourcesRequired, SVGFitToViewBox {
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGSymbolElement: {
-    prototype: SVGSymbolElement;
-    new(): SVGSymbolElement;
-}
-
-interface SVGTSpanElement extends SVGTextPositioningElement {
-}
-
-declare var SVGTSpanElement: {
-    prototype: SVGTSpanElement;
-    new(): SVGTSpanElement;
-}
-
-interface SVGTextContentElement extends SVGElement, SVGStylable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired {
-    readonly lengthAdjust: SVGAnimatedEnumeration;
-    readonly textLength: SVGAnimatedLength;
-    getCharNumAtPosition(point: SVGPoint): number;
-    getComputedTextLength(): number;
-    getEndPositionOfChar(charnum: number): SVGPoint;
-    getExtentOfChar(charnum: number): SVGRect;
-    getNumberOfChars(): number;
-    getRotationOfChar(charnum: number): number;
-    getStartPositionOfChar(charnum: number): SVGPoint;
-    getSubStringLength(charnum: number, nchars: number): number;
-    selectSubString(charnum: number, nchars: number): void;
-    readonly LENGTHADJUST_SPACING: number;
-    readonly LENGTHADJUST_SPACINGANDGLYPHS: number;
-    readonly LENGTHADJUST_UNKNOWN: number;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGTextContentElement: {
-    prototype: SVGTextContentElement;
-    new(): SVGTextContentElement;
-    readonly LENGTHADJUST_SPACING: number;
-    readonly LENGTHADJUST_SPACINGANDGLYPHS: number;
-    readonly LENGTHADJUST_UNKNOWN: number;
-}
-
-interface SVGTextElement extends SVGTextPositioningElement, SVGTransformable {
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGTextElement: {
-    prototype: SVGTextElement;
-    new(): SVGTextElement;
-}
-
-interface SVGTextPathElement extends SVGTextContentElement, SVGURIReference {
-    readonly method: SVGAnimatedEnumeration;
-    readonly spacing: SVGAnimatedEnumeration;
-    readonly startOffset: SVGAnimatedLength;
-    readonly TEXTPATH_METHODTYPE_ALIGN: number;
-    readonly TEXTPATH_METHODTYPE_STRETCH: number;
-    readonly TEXTPATH_METHODTYPE_UNKNOWN: number;
-    readonly TEXTPATH_SPACINGTYPE_AUTO: number;
-    readonly TEXTPATH_SPACINGTYPE_EXACT: number;
-    readonly TEXTPATH_SPACINGTYPE_UNKNOWN: number;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGTextPathElement: {
-    prototype: SVGTextPathElement;
-    new(): SVGTextPathElement;
-    readonly TEXTPATH_METHODTYPE_ALIGN: number;
-    readonly TEXTPATH_METHODTYPE_STRETCH: number;
-    readonly TEXTPATH_METHODTYPE_UNKNOWN: number;
-    readonly TEXTPATH_SPACINGTYPE_AUTO: number;
-    readonly TEXTPATH_SPACINGTYPE_EXACT: number;
-    readonly TEXTPATH_SPACINGTYPE_UNKNOWN: number;
-}
-
-interface SVGTextPositioningElement extends SVGTextContentElement {
-    readonly dx: SVGAnimatedLengthList;
-    readonly dy: SVGAnimatedLengthList;
-    readonly rotate: SVGAnimatedNumberList;
-    readonly x: SVGAnimatedLengthList;
-    readonly y: SVGAnimatedLengthList;
-}
-
-declare var SVGTextPositioningElement: {
-    prototype: SVGTextPositioningElement;
-    new(): SVGTextPositioningElement;
-}
-
-interface SVGTitleElement extends SVGElement, SVGStylable, SVGLangSpace {
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGTitleElement: {
-    prototype: SVGTitleElement;
-    new(): SVGTitleElement;
-}
-
-interface SVGTransform {
-    readonly angle: number;
-    readonly matrix: SVGMatrix;
-    readonly type: number;
-    setMatrix(matrix: SVGMatrix): void;
-    setRotate(angle: number, cx: number, cy: number): void;
-    setScale(sx: number, sy: number): void;
-    setSkewX(angle: number): void;
-    setSkewY(angle: number): void;
-    setTranslate(tx: number, ty: number): void;
-    readonly SVG_TRANSFORM_MATRIX: number;
-    readonly SVG_TRANSFORM_ROTATE: number;
-    readonly SVG_TRANSFORM_SCALE: number;
-    readonly SVG_TRANSFORM_SKEWX: number;
-    readonly SVG_TRANSFORM_SKEWY: number;
-    readonly SVG_TRANSFORM_TRANSLATE: number;
-    readonly SVG_TRANSFORM_UNKNOWN: number;
-}
-
-declare var SVGTransform: {
-    prototype: SVGTransform;
-    new(): SVGTransform;
-    readonly SVG_TRANSFORM_MATRIX: number;
-    readonly SVG_TRANSFORM_ROTATE: number;
-    readonly SVG_TRANSFORM_SCALE: number;
-    readonly SVG_TRANSFORM_SKEWX: number;
-    readonly SVG_TRANSFORM_SKEWY: number;
-    readonly SVG_TRANSFORM_TRANSLATE: number;
-    readonly SVG_TRANSFORM_UNKNOWN: number;
-}
-
-interface SVGTransformList {
-    readonly numberOfItems: number;
-    appendItem(newItem: SVGTransform): SVGTransform;
-    clear(): void;
-    consolidate(): SVGTransform;
-    createSVGTransformFromMatrix(matrix: SVGMatrix): SVGTransform;
-    getItem(index: number): SVGTransform;
-    initialize(newItem: SVGTransform): SVGTransform;
-    insertItemBefore(newItem: SVGTransform, index: number): SVGTransform;
-    removeItem(index: number): SVGTransform;
-    replaceItem(newItem: SVGTransform, index: number): SVGTransform;
-}
-
-declare var SVGTransformList: {
-    prototype: SVGTransformList;
-    new(): SVGTransformList;
-}
-
-interface SVGUnitTypes {
-    readonly SVG_UNIT_TYPE_OBJECTBOUNDINGBOX: number;
-    readonly SVG_UNIT_TYPE_UNKNOWN: number;
-    readonly SVG_UNIT_TYPE_USERSPACEONUSE: number;
-}
-declare var SVGUnitTypes: SVGUnitTypes;
-
-interface SVGUseElement extends SVGElement, SVGStylable, SVGTransformable, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGURIReference {
-    readonly animatedInstanceRoot: SVGElementInstance;
-    readonly height: SVGAnimatedLength;
-    readonly instanceRoot: SVGElementInstance;
-    readonly width: SVGAnimatedLength;
-    readonly x: SVGAnimatedLength;
-    readonly y: SVGAnimatedLength;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGUseElement: {
-    prototype: SVGUseElement;
-    new(): SVGUseElement;
-}
-
-interface SVGViewElement extends SVGElement, SVGExternalResourcesRequired, SVGFitToViewBox, SVGZoomAndPan {
-    readonly viewTarget: SVGStringList;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var SVGViewElement: {
-    prototype: SVGViewElement;
-    new(): SVGViewElement;
-}
-
-interface SVGZoomAndPan {
-    readonly zoomAndPan: number;
-}
-
-declare var SVGZoomAndPan: {
-    readonly SVG_ZOOMANDPAN_DISABLE: number;
-    readonly SVG_ZOOMANDPAN_MAGNIFY: number;
-    readonly SVG_ZOOMANDPAN_UNKNOWN: number;
-}
-
-interface SVGZoomEvent extends UIEvent {
-    readonly newScale: number;
-    readonly newTranslate: SVGPoint;
-    readonly previousScale: number;
-    readonly previousTranslate: SVGPoint;
-    readonly zoomRectScreen: SVGRect;
-}
-
-declare var SVGZoomEvent: {
-    prototype: SVGZoomEvent;
-    new(): SVGZoomEvent;
-}
-
-interface Screen extends EventTarget {
-    readonly availHeight: number;
-    readonly availWidth: number;
-    bufferDepth: number;
-    readonly colorDepth: number;
-    readonly deviceXDPI: number;
-    readonly deviceYDPI: number;
-    readonly fontSmoothingEnabled: boolean;
-    readonly height: number;
-    readonly logicalXDPI: number;
-    readonly logicalYDPI: number;
-    readonly msOrientation: string;
-    onmsorientationchange: (this: this, ev: Event) => any;
-    readonly pixelDepth: number;
-    readonly systemXDPI: number;
-    readonly systemYDPI: number;
-    readonly width: number;
-    msLockOrientation(orientations: string | string[]): boolean;
-    msUnlockOrientation(): void;
-    addEventListener(type: "MSOrientationChange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var Screen: {
-    prototype: Screen;
-    new(): Screen;
-}
-
-interface ScriptNotifyEvent extends Event {
-    readonly callingUri: string;
-    readonly value: string;
-}
-
-declare var ScriptNotifyEvent: {
-    prototype: ScriptNotifyEvent;
-    new(): ScriptNotifyEvent;
-}
-
-interface ScriptProcessorNode extends AudioNode {
-    readonly bufferSize: number;
-    onaudioprocess: (this: this, ev: AudioProcessingEvent) => any;
-    addEventListener(type: "audioprocess", listener: (this: this, ev: AudioProcessingEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var ScriptProcessorNode: {
-    prototype: ScriptProcessorNode;
-    new(): ScriptProcessorNode;
-}
-
-interface Selection {
-    readonly anchorNode: Node;
-    readonly anchorOffset: number;
-    readonly focusNode: Node;
-    readonly focusOffset: number;
-    readonly isCollapsed: boolean;
-    readonly rangeCount: number;
-    readonly type: string;
-    addRange(range: Range): void;
-    collapse(parentNode: Node, offset: number): void;
-    collapseToEnd(): void;
-    collapseToStart(): void;
-    containsNode(node: Node, partlyContained: boolean): boolean;
-    deleteFromDocument(): void;
-    empty(): void;
-    extend(newNode: Node, offset: number): void;
-    getRangeAt(index: number): Range;
-    removeAllRanges(): void;
-    removeRange(range: Range): void;
-    selectAllChildren(parentNode: Node): void;
-    setBaseAndExtent(baseNode: Node, baseOffset: number, extentNode: Node, extentOffset: number): void;
-    toString(): string;
-}
-
-declare var Selection: {
-    prototype: Selection;
-    new(): Selection;
-}
-
-interface SourceBuffer extends EventTarget {
-    appendWindowEnd: number;
-    appendWindowStart: number;
-    readonly audioTracks: AudioTrackList;
-    readonly buffered: TimeRanges;
-    mode: string;
-    timestampOffset: number;
-    readonly updating: boolean;
-    readonly videoTracks: VideoTrackList;
-    abort(): void;
-    appendBuffer(data: ArrayBuffer | ArrayBufferView): void;
-    appendStream(stream: MSStream, maxSize?: number): void;
-    remove(start: number, end: number): void;
-}
-
-declare var SourceBuffer: {
-    prototype: SourceBuffer;
-    new(): SourceBuffer;
-}
-
-interface SourceBufferList extends EventTarget {
-    readonly length: number;
-    item(index: number): SourceBuffer;
-    [index: number]: SourceBuffer;
-}
-
-declare var SourceBufferList: {
-    prototype: SourceBufferList;
-    new(): SourceBufferList;
-}
-
-interface StereoPannerNode extends AudioNode {
-    readonly pan: AudioParam;
-}
-
-declare var StereoPannerNode: {
-    prototype: StereoPannerNode;
-    new(): StereoPannerNode;
-}
-
-interface Storage {
-    readonly length: number;
-    clear(): void;
-    getItem(key: string): string | null;
-    key(index: number): string | null;
-    removeItem(key: string): void;
-    setItem(key: string, data: string): void;
-    [key: string]: any;
-    [index: number]: string;
-}
-
-declare var Storage: {
-    prototype: Storage;
-    new(): Storage;
-}
-
-interface StorageEvent extends Event {
-    readonly url: string;
-    key?: string;
-    oldValue?: string;
-    newValue?: string;
-    storageArea?: Storage;
-}
-
-declare var StorageEvent: {
-    prototype: StorageEvent;
-    new (type: string, eventInitDict?: StorageEventInit): StorageEvent;
-}
-
-interface StyleMedia {
-    readonly type: string;
-    matchMedium(mediaquery: string): boolean;
-}
-
-declare var StyleMedia: {
-    prototype: StyleMedia;
-    new(): StyleMedia;
-}
-
-interface StyleSheet {
-    disabled: boolean;
-    readonly href: string;
-    readonly media: MediaList;
-    readonly ownerNode: Node;
-    readonly parentStyleSheet: StyleSheet;
-    readonly title: string;
-    readonly type: string;
-}
-
-declare var StyleSheet: {
-    prototype: StyleSheet;
-    new(): StyleSheet;
-}
-
-interface StyleSheetList {
-    readonly length: number;
-    item(index?: number): StyleSheet;
-    [index: number]: StyleSheet;
-}
-
-declare var StyleSheetList: {
-    prototype: StyleSheetList;
-    new(): StyleSheetList;
-}
-
-interface StyleSheetPageList {
-    readonly length: number;
-    item(index: number): CSSPageRule;
-    [index: number]: CSSPageRule;
-}
-
-declare var StyleSheetPageList: {
-    prototype: StyleSheetPageList;
-    new(): StyleSheetPageList;
-}
-
-interface SubtleCrypto {
-    decrypt(algorithm: string | RsaOaepParams | AesCtrParams | AesCbcParams | AesCmacParams | AesGcmParams | AesCfbParams, key: CryptoKey, data: BufferSource): PromiseLike<ArrayBuffer>;
-    deriveBits(algorithm: string | EcdhKeyDeriveParams | DhKeyDeriveParams | ConcatParams | HkdfCtrParams | Pbkdf2Params, baseKey: CryptoKey, length: number): PromiseLike<ArrayBuffer>;
-    deriveKey(algorithm: string | EcdhKeyDeriveParams | DhKeyDeriveParams | ConcatParams | HkdfCtrParams | Pbkdf2Params, baseKey: CryptoKey, derivedKeyType: string | AesDerivedKeyParams | HmacImportParams | ConcatParams | HkdfCtrParams | Pbkdf2Params, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
-    digest(algorithm: AlgorithmIdentifier, data: BufferSource): PromiseLike<ArrayBuffer>;
-    encrypt(algorithm: string | RsaOaepParams | AesCtrParams | AesCbcParams | AesCmacParams | AesGcmParams | AesCfbParams, key: CryptoKey, data: BufferSource): PromiseLike<ArrayBuffer>;
-    exportKey(format: "jwk", key: CryptoKey): PromiseLike<JsonWebKey>;
-    exportKey(format: "raw" | "pkcs8" | "spki", key: CryptoKey): PromiseLike<ArrayBuffer>;
-    exportKey(format: string, key: CryptoKey): PromiseLike<JsonWebKey | ArrayBuffer>;
-    generateKey(algorithm: string, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKeyPair | CryptoKey>;
-    generateKey(algorithm: RsaHashedKeyGenParams | EcKeyGenParams | DhKeyGenParams, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKeyPair>;
-    generateKey(algorithm: AesKeyGenParams | HmacKeyGenParams | Pbkdf2Params, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
-    importKey(format: "jwk", keyData: JsonWebKey, algorithm: string | RsaHashedImportParams | EcKeyImportParams | HmacImportParams | DhImportKeyParams, extractable:boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
-    importKey(format: "raw" | "pkcs8" | "spki", keyData: BufferSource, algorithm: string | RsaHashedImportParams | EcKeyImportParams | HmacImportParams | DhImportKeyParams, extractable:boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
-    importKey(format: string, keyData: JsonWebKey | BufferSource, algorithm: string | RsaHashedImportParams | EcKeyImportParams | HmacImportParams | DhImportKeyParams, extractable:boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
-    sign(algorithm: string | RsaPssParams | EcdsaParams | AesCmacParams, key: CryptoKey, data: BufferSource): PromiseLike<ArrayBuffer>;
-    unwrapKey(format: string, wrappedKey: BufferSource, unwrappingKey: CryptoKey, unwrapAlgorithm: AlgorithmIdentifier, unwrappedKeyAlgorithm: AlgorithmIdentifier, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
-    verify(algorithm: string | RsaPssParams | EcdsaParams | AesCmacParams, key: CryptoKey, signature: BufferSource, data: BufferSource): PromiseLike<boolean>;
-    wrapKey(format: string, key: CryptoKey, wrappingKey: CryptoKey, wrapAlgorithm: AlgorithmIdentifier): PromiseLike<ArrayBuffer>;
-}
-
-declare var SubtleCrypto: {
-    prototype: SubtleCrypto;
-    new(): SubtleCrypto;
-}
-
-interface Text extends CharacterData {
-    readonly wholeText: string;
-    splitText(offset: number): Text;
-}
-
-declare var Text: {
-    prototype: Text;
-    new(): Text;
-}
-
-interface TextEvent extends UIEvent {
-    readonly data: string;
-    readonly inputMethod: number;
-    readonly locale: string;
-    initTextEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, dataArg: string, inputMethod: number, locale: string): void;
-    readonly DOM_INPUT_METHOD_DROP: number;
-    readonly DOM_INPUT_METHOD_HANDWRITING: number;
-    readonly DOM_INPUT_METHOD_IME: number;
-    readonly DOM_INPUT_METHOD_KEYBOARD: number;
-    readonly DOM_INPUT_METHOD_MULTIMODAL: number;
-    readonly DOM_INPUT_METHOD_OPTION: number;
-    readonly DOM_INPUT_METHOD_PASTE: number;
-    readonly DOM_INPUT_METHOD_SCRIPT: number;
-    readonly DOM_INPUT_METHOD_UNKNOWN: number;
-    readonly DOM_INPUT_METHOD_VOICE: number;
-}
-
-declare var TextEvent: {
-    prototype: TextEvent;
-    new(): TextEvent;
-    readonly DOM_INPUT_METHOD_DROP: number;
-    readonly DOM_INPUT_METHOD_HANDWRITING: number;
-    readonly DOM_INPUT_METHOD_IME: number;
-    readonly DOM_INPUT_METHOD_KEYBOARD: number;
-    readonly DOM_INPUT_METHOD_MULTIMODAL: number;
-    readonly DOM_INPUT_METHOD_OPTION: number;
-    readonly DOM_INPUT_METHOD_PASTE: number;
-    readonly DOM_INPUT_METHOD_SCRIPT: number;
-    readonly DOM_INPUT_METHOD_UNKNOWN: number;
-    readonly DOM_INPUT_METHOD_VOICE: number;
-}
-
-interface TextMetrics {
-    readonly width: number;
-}
-
-declare var TextMetrics: {
-    prototype: TextMetrics;
-    new(): TextMetrics;
-}
-
-interface TextTrack extends EventTarget {
-    readonly activeCues: TextTrackCueList;
-    readonly cues: TextTrackCueList;
-    readonly inBandMetadataTrackDispatchType: string;
-    readonly kind: string;
-    readonly label: string;
-    readonly language: string;
-    mode: any;
-    oncuechange: (this: this, ev: Event) => any;
-    onerror: (this: this, ev: ErrorEvent) => any;
-    onload: (this: this, ev: Event) => any;
-    readonly readyState: number;
-    addCue(cue: TextTrackCue): void;
-    removeCue(cue: TextTrackCue): void;
-    readonly DISABLED: number;
-    readonly ERROR: number;
-    readonly HIDDEN: number;
-    readonly LOADED: number;
-    readonly LOADING: number;
-    readonly NONE: number;
-    readonly SHOWING: number;
-    addEventListener(type: "cuechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var TextTrack: {
-    prototype: TextTrack;
-    new(): TextTrack;
-    readonly DISABLED: number;
-    readonly ERROR: number;
-    readonly HIDDEN: number;
-    readonly LOADED: number;
-    readonly LOADING: number;
-    readonly NONE: number;
-    readonly SHOWING: number;
-}
-
-interface TextTrackCue extends EventTarget {
-    endTime: number;
-    id: string;
-    onenter: (this: this, ev: Event) => any;
-    onexit: (this: this, ev: Event) => any;
-    pauseOnExit: boolean;
-    startTime: number;
-    text: string;
-    readonly track: TextTrack;
-    getCueAsHTML(): DocumentFragment;
-    addEventListener(type: "enter", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "exit", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var TextTrackCue: {
-    prototype: TextTrackCue;
-    new(startTime: number, endTime: number, text: string): TextTrackCue;
-}
-
-interface TextTrackCueList {
-    readonly length: number;
-    getCueById(id: string): TextTrackCue;
-    item(index: number): TextTrackCue;
-    [index: number]: TextTrackCue;
-}
-
-declare var TextTrackCueList: {
-    prototype: TextTrackCueList;
-    new(): TextTrackCueList;
-}
-
-interface TextTrackList extends EventTarget {
-    readonly length: number;
-    onaddtrack: ((this: this, ev: TrackEvent) => any) | null;
-    item(index: number): TextTrack;
-    addEventListener(type: "addtrack", listener: (this: this, ev: TrackEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-    [index: number]: TextTrack;
-}
-
-declare var TextTrackList: {
-    prototype: TextTrackList;
-    new(): TextTrackList;
-}
-
-interface TimeRanges {
-    readonly length: number;
-    end(index: number): number;
-    start(index: number): number;
-}
-
-declare var TimeRanges: {
-    prototype: TimeRanges;
-    new(): TimeRanges;
-}
-
-interface Touch {
-    readonly clientX: number;
-    readonly clientY: number;
-    readonly identifier: number;
-    readonly pageX: number;
-    readonly pageY: number;
-    readonly screenX: number;
-    readonly screenY: number;
-    readonly target: EventTarget;
-}
-
-declare var Touch: {
-    prototype: Touch;
-    new(): Touch;
-}
-
-interface TouchEvent extends UIEvent {
-    readonly altKey: boolean;
-    readonly changedTouches: TouchList;
-    readonly ctrlKey: boolean;
-    readonly metaKey: boolean;
-    readonly shiftKey: boolean;
-    readonly targetTouches: TouchList;
-    readonly touches: TouchList;
-}
-
-declare var TouchEvent: {
-    prototype: TouchEvent;
-    new(): TouchEvent;
-}
-
-interface TouchList {
-    readonly length: number;
-    item(index: number): Touch | null;
-    [index: number]: Touch;
-}
-
-declare var TouchList: {
-    prototype: TouchList;
-    new(): TouchList;
-}
-
-interface TrackEvent extends Event {
-    readonly track: any;
-}
-
-declare var TrackEvent: {
-    prototype: TrackEvent;
-    new(): TrackEvent;
-}
-
-interface TransitionEvent extends Event {
-    readonly elapsedTime: number;
-    readonly propertyName: string;
-    initTransitionEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, propertyNameArg: string, elapsedTimeArg: number): void;
-}
-
-declare var TransitionEvent: {
-    prototype: TransitionEvent;
-    new(): TransitionEvent;
-}
-
-interface TreeWalker {
-    currentNode: Node;
-    readonly expandEntityReferences: boolean;
-    readonly filter: NodeFilter;
-    readonly root: Node;
-    readonly whatToShow: number;
-    firstChild(): Node;
-    lastChild(): Node;
-    nextNode(): Node;
-    nextSibling(): Node;
-    parentNode(): Node;
-    previousNode(): Node;
-    previousSibling(): Node;
-}
-
-declare var TreeWalker: {
-    prototype: TreeWalker;
-    new(): TreeWalker;
-}
-
-interface UIEvent extends Event {
-    readonly detail: number;
-    readonly view: Window;
-    initUIEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number): void;
-}
-
-declare var UIEvent: {
-    prototype: UIEvent;
-    new(type: string, eventInitDict?: UIEventInit): UIEvent;
-}
-
-interface URL {
-    hash: string;
-    host: string;
-    hostname: string;
-    href: string;
-    readonly origin: string;
-    password: string;
-    pathname: string;
-    port: string;
-    protocol: string;
-    search: string;
-    username: string;
-    toString(): string;
-}
-
-declare var URL: {
-    prototype: URL;
-    new(url: string, base?: string): URL;
-    createObjectURL(object: any, options?: ObjectURLOptions): string;
-    revokeObjectURL(url: string): void;
-}
-
-interface UnviewableContentIdentifiedEvent extends NavigationEventWithReferrer {
-    readonly mediaType: string;
-}
-
-declare var UnviewableContentIdentifiedEvent: {
-    prototype: UnviewableContentIdentifiedEvent;
-    new(): UnviewableContentIdentifiedEvent;
-}
-
-interface ValidityState {
-    readonly badInput: boolean;
-    readonly customError: boolean;
-    readonly patternMismatch: boolean;
-    readonly rangeOverflow: boolean;
-    readonly rangeUnderflow: boolean;
-    readonly stepMismatch: boolean;
-    readonly tooLong: boolean;
-    readonly typeMismatch: boolean;
-    readonly valid: boolean;
-    readonly valueMissing: boolean;
-}
-
-declare var ValidityState: {
-    prototype: ValidityState;
-    new(): ValidityState;
-}
-
-interface VideoPlaybackQuality {
-    readonly corruptedVideoFrames: number;
-    readonly creationTime: number;
-    readonly droppedVideoFrames: number;
-    readonly totalFrameDelay: number;
-    readonly totalVideoFrames: number;
-}
-
-declare var VideoPlaybackQuality: {
-    prototype: VideoPlaybackQuality;
-    new(): VideoPlaybackQuality;
-}
-
-interface VideoTrack {
-    readonly id: string;
-    kind: string;
-    readonly label: string;
-    language: string;
-    selected: boolean;
-    readonly sourceBuffer: SourceBuffer;
-}
-
-declare var VideoTrack: {
-    prototype: VideoTrack;
-    new(): VideoTrack;
-}
-
-interface VideoTrackList extends EventTarget {
-    readonly length: number;
-    onaddtrack: (this: this, ev: TrackEvent) => any;
-    onchange: (this: this, ev: Event) => any;
-    onremovetrack: (this: this, ev: TrackEvent) => any;
-    readonly selectedIndex: number;
-    getTrackById(id: string): VideoTrack | null;
-    item(index: number): VideoTrack;
-    addEventListener(type: "addtrack", listener: (this: this, ev: TrackEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "change", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "removetrack", listener: (this: this, ev: TrackEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-    [index: number]: VideoTrack;
-}
-
-declare var VideoTrackList: {
-    prototype: VideoTrackList;
-    new(): VideoTrackList;
-}
-
-interface WEBGL_compressed_texture_s3tc {
-    readonly COMPRESSED_RGBA_S3TC_DXT1_EXT: number;
-    readonly COMPRESSED_RGBA_S3TC_DXT3_EXT: number;
-    readonly COMPRESSED_RGBA_S3TC_DXT5_EXT: number;
-    readonly COMPRESSED_RGB_S3TC_DXT1_EXT: number;
-}
-
-declare var WEBGL_compressed_texture_s3tc: {
-    prototype: WEBGL_compressed_texture_s3tc;
-    new(): WEBGL_compressed_texture_s3tc;
-    readonly COMPRESSED_RGBA_S3TC_DXT1_EXT: number;
-    readonly COMPRESSED_RGBA_S3TC_DXT3_EXT: number;
-    readonly COMPRESSED_RGBA_S3TC_DXT5_EXT: number;
-    readonly COMPRESSED_RGB_S3TC_DXT1_EXT: number;
-}
-
-interface WEBGL_debug_renderer_info {
-    readonly UNMASKED_RENDERER_WEBGL: number;
-    readonly UNMASKED_VENDOR_WEBGL: number;
-}
-
-declare var WEBGL_debug_renderer_info: {
-    prototype: WEBGL_debug_renderer_info;
-    new(): WEBGL_debug_renderer_info;
-    readonly UNMASKED_RENDERER_WEBGL: number;
-    readonly UNMASKED_VENDOR_WEBGL: number;
-}
-
-interface WEBGL_depth_texture {
-    readonly UNSIGNED_INT_24_8_WEBGL: number;
-}
-
-declare var WEBGL_depth_texture: {
-    prototype: WEBGL_depth_texture;
-    new(): WEBGL_depth_texture;
-    readonly UNSIGNED_INT_24_8_WEBGL: number;
-}
-
-interface WaveShaperNode extends AudioNode {
-    curve: Float32Array | null;
-    oversample: string;
-}
-
-declare var WaveShaperNode: {
-    prototype: WaveShaperNode;
-    new(): WaveShaperNode;
-}
-
-interface WebGLActiveInfo {
-    readonly name: string;
-    readonly size: number;
-    readonly type: number;
-}
-
-declare var WebGLActiveInfo: {
-    prototype: WebGLActiveInfo;
-    new(): WebGLActiveInfo;
-}
-
-interface WebGLBuffer extends WebGLObject {
-}
-
-declare var WebGLBuffer: {
-    prototype: WebGLBuffer;
-    new(): WebGLBuffer;
-}
-
-interface WebGLContextEvent extends Event {
-    readonly statusMessage: string;
-}
-
-declare var WebGLContextEvent: {
-    prototype: WebGLContextEvent;
-    new(type: string, eventInitDict?: WebGLContextEventInit): WebGLContextEvent;
-}
-
-interface WebGLFramebuffer extends WebGLObject {
-}
-
-declare var WebGLFramebuffer: {
-    prototype: WebGLFramebuffer;
-    new(): WebGLFramebuffer;
-}
-
-interface WebGLObject {
-}
-
-declare var WebGLObject: {
-    prototype: WebGLObject;
-    new(): WebGLObject;
-}
-
-interface WebGLProgram extends WebGLObject {
-}
-
-declare var WebGLProgram: {
-    prototype: WebGLProgram;
-    new(): WebGLProgram;
-}
-
-interface WebGLRenderbuffer extends WebGLObject {
-}
-
-declare var WebGLRenderbuffer: {
-    prototype: WebGLRenderbuffer;
-    new(): WebGLRenderbuffer;
-}
-
-interface WebGLRenderingContext {
-    readonly canvas: HTMLCanvasElement;
-    readonly drawingBufferHeight: number;
-    readonly drawingBufferWidth: number;
-    activeTexture(texture: number): void;
-    attachShader(program: WebGLProgram | null, shader: WebGLShader | null): void;
-    bindAttribLocation(program: WebGLProgram | null, index: number, name: string): void;
-    bindBuffer(target: number, buffer: WebGLBuffer | null): void;
-    bindFramebuffer(target: number, framebuffer: WebGLFramebuffer | null): void;
-    bindRenderbuffer(target: number, renderbuffer: WebGLRenderbuffer | null): void;
-    bindTexture(target: number, texture: WebGLTexture | null): void;
-    blendColor(red: number, green: number, blue: number, alpha: number): void;
-    blendEquation(mode: number): void;
-    blendEquationSeparate(modeRGB: number, modeAlpha: number): void;
-    blendFunc(sfactor: number, dfactor: number): void;
-    blendFuncSeparate(srcRGB: number, dstRGB: number, srcAlpha: number, dstAlpha: number): void;
-    bufferData(target: number, size: number | ArrayBufferView | ArrayBuffer, usage: number): void;
-    bufferSubData(target: number, offset: number, data: ArrayBufferView | ArrayBuffer): void;
-    checkFramebufferStatus(target: number): number;
-    clear(mask: number): void;
-    clearColor(red: number, green: number, blue: number, alpha: number): void;
-    clearDepth(depth: number): void;
-    clearStencil(s: number): void;
-    colorMask(red: boolean, green: boolean, blue: boolean, alpha: boolean): void;
-    compileShader(shader: WebGLShader | null): void;
-    compressedTexImage2D(target: number, level: number, internalformat: number, width: number, height: number, border: number, data: ArrayBufferView): void;
-    compressedTexSubImage2D(target: number, level: number, xoffset: number, yoffset: number, width: number, height: number, format: number, data: ArrayBufferView): void;
-    copyTexImage2D(target: number, level: number, internalformat: number, x: number, y: number, width: number, height: number, border: number): void;
-    copyTexSubImage2D(target: number, level: number, xoffset: number, yoffset: number, x: number, y: number, width: number, height: number): void;
-    createBuffer(): WebGLBuffer | null;
-    createFramebuffer(): WebGLFramebuffer | null;
-    createProgram(): WebGLProgram | null;
-    createRenderbuffer(): WebGLRenderbuffer | null;
-    createShader(type: number): WebGLShader | null;
-    createTexture(): WebGLTexture | null;
-    cullFace(mode: number): void;
-    deleteBuffer(buffer: WebGLBuffer | null): void;
-    deleteFramebuffer(framebuffer: WebGLFramebuffer | null): void;
-    deleteProgram(program: WebGLProgram | null): void;
-    deleteRenderbuffer(renderbuffer: WebGLRenderbuffer | null): void;
-    deleteShader(shader: WebGLShader | null): void;
-    deleteTexture(texture: WebGLTexture | null): void;
-    depthFunc(func: number): void;
-    depthMask(flag: boolean): void;
-    depthRange(zNear: number, zFar: number): void;
-    detachShader(program: WebGLProgram | null, shader: WebGLShader | null): void;
-    disable(cap: number): void;
-    disableVertexAttribArray(index: number): void;
-    drawArrays(mode: number, first: number, count: number): void;
-    drawElements(mode: number, count: number, type: number, offset: number): void;
-    enable(cap: number): void;
-    enableVertexAttribArray(index: number): void;
-    finish(): void;
-    flush(): void;
-    framebufferRenderbuffer(target: number, attachment: number, renderbuffertarget: number, renderbuffer: WebGLRenderbuffer | null): void;
-    framebufferTexture2D(target: number, attachment: number, textarget: number, texture: WebGLTexture | null, level: number): void;
-    frontFace(mode: number): void;
-    generateMipmap(target: number): void;
-    getActiveAttrib(program: WebGLProgram | null, index: number): WebGLActiveInfo | null;
-    getActiveUniform(program: WebGLProgram | null, index: number): WebGLActiveInfo | null;
-    getAttachedShaders(program: WebGLProgram | null): WebGLShader[] | null;
-    getAttribLocation(program: WebGLProgram | null, name: string): number;
-    getBufferParameter(target: number, pname: number): any;
-    getContextAttributes(): WebGLContextAttributes;
-    getError(): number;
-    getExtension(name: string): any;
-    getFramebufferAttachmentParameter(target: number, attachment: number, pname: number): any;
-    getParameter(pname: number): any;
-    getProgramInfoLog(program: WebGLProgram | null): string | null;
-    getProgramParameter(program: WebGLProgram | null, pname: number): any;
-    getRenderbufferParameter(target: number, pname: number): any;
-    getShaderInfoLog(shader: WebGLShader | null): string | null;
-    getShaderParameter(shader: WebGLShader | null, pname: number): any;
-    getShaderPrecisionFormat(shadertype: number, precisiontype: number): WebGLShaderPrecisionFormat | null;
-    getShaderSource(shader: WebGLShader | null): string | null;
-    getSupportedExtensions(): string[] | null;
-    getTexParameter(target: number, pname: number): any;
-    getUniform(program: WebGLProgram | null, location: WebGLUniformLocation | null): any;
-    getUniformLocation(program: WebGLProgram | null, name: string): WebGLUniformLocation | null;
-    getVertexAttrib(index: number, pname: number): any;
-    getVertexAttribOffset(index: number, pname: number): number;
-    hint(target: number, mode: number): void;
-    isBuffer(buffer: WebGLBuffer | null): boolean;
-    isContextLost(): boolean;
-    isEnabled(cap: number): boolean;
-    isFramebuffer(framebuffer: WebGLFramebuffer | null): boolean;
-    isProgram(program: WebGLProgram | null): boolean;
-    isRenderbuffer(renderbuffer: WebGLRenderbuffer | null): boolean;
-    isShader(shader: WebGLShader | null): boolean;
-    isTexture(texture: WebGLTexture | null): boolean;
-    lineWidth(width: number): void;
-    linkProgram(program: WebGLProgram | null): void;
-    pixelStorei(pname: number, param: number): void;
-    polygonOffset(factor: number, units: number): void;
-    readPixels(x: number, y: number, width: number, height: number, format: number, type: number, pixels: ArrayBufferView | null): void;
-    renderbufferStorage(target: number, internalformat: number, width: number, height: number): void;
-    sampleCoverage(value: number, invert: boolean): void;
-    scissor(x: number, y: number, width: number, height: number): void;
-    shaderSource(shader: WebGLShader | null, source: string): void;
-    stencilFunc(func: number, ref: number, mask: number): void;
-    stencilFuncSeparate(face: number, func: number, ref: number, mask: number): void;
-    stencilMask(mask: number): void;
-    stencilMaskSeparate(face: number, mask: number): void;
-    stencilOp(fail: number, zfail: number, zpass: number): void;
-    stencilOpSeparate(face: number, fail: number, zfail: number, zpass: number): void;
-    texImage2D(target: number, level: number, internalformat: number, width: number, height: number, border: number, format: number, type: number, pixels?: ArrayBufferView): void;
-    texImage2D(target: number, level: number, internalformat: number, format: number, type: number, pixels?: ImageData | HTMLVideoElement | HTMLImageElement | HTMLCanvasElement): void;
-    texParameterf(target: number, pname: number, param: number): void;
-    texParameteri(target: number, pname: number, param: number): void;
-    texSubImage2D(target: number, level: number, xoffset: number, yoffset: number, width: number, height: number, format: number, type: number, pixels?: ArrayBufferView): void;
-    texSubImage2D(target: number, level: number, xoffset: number, yoffset: number, format: number, type: number, pixels?: ImageData | HTMLVideoElement | HTMLImageElement | HTMLCanvasElement): void;
-    uniform1f(location: WebGLUniformLocation | null, x: number): void;
-    uniform1fv(location: WebGLUniformLocation, v: Float32Array | number[]): void;
-    uniform1i(location: WebGLUniformLocation | null, x: number): void;
-    uniform1iv(location: WebGLUniformLocation, v: Int32Array | number[]): void;
-    uniform2f(location: WebGLUniformLocation | null, x: number, y: number): void;
-    uniform2fv(location: WebGLUniformLocation, v: Float32Array | number[]): void;
-    uniform2i(location: WebGLUniformLocation | null, x: number, y: number): void;
-    uniform2iv(location: WebGLUniformLocation, v: Int32Array | number[]): void;
-    uniform3f(location: WebGLUniformLocation | null, x: number, y: number, z: number): void;
-    uniform3fv(location: WebGLUniformLocation, v: Float32Array | number[]): void;
-    uniform3i(location: WebGLUniformLocation | null, x: number, y: number, z: number): void;
-    uniform3iv(location: WebGLUniformLocation, v: Int32Array | number[]): void;
-    uniform4f(location: WebGLUniformLocation | null, x: number, y: number, z: number, w: number): void;
-    uniform4fv(location: WebGLUniformLocation, v: Float32Array | number[]): void;
-    uniform4i(location: WebGLUniformLocation | null, x: number, y: number, z: number, w: number): void;
-    uniform4iv(location: WebGLUniformLocation, v: Int32Array | number[]): void;
-    uniformMatrix2fv(location: WebGLUniformLocation, transpose: boolean, value: Float32Array | number[]): void;
-    uniformMatrix3fv(location: WebGLUniformLocation, transpose: boolean, value: Float32Array | number[]): void;
-    uniformMatrix4fv(location: WebGLUniformLocation, transpose: boolean, value: Float32Array | number[]): void;
-    useProgram(program: WebGLProgram | null): void;
-    validateProgram(program: WebGLProgram | null): void;
-    vertexAttrib1f(indx: number, x: number): void;
-    vertexAttrib1fv(indx: number, values: Float32Array | number[]): void;
-    vertexAttrib2f(indx: number, x: number, y: number): void;
-    vertexAttrib2fv(indx: number, values: Float32Array | number[]): void;
-    vertexAttrib3f(indx: number, x: number, y: number, z: number): void;
-    vertexAttrib3fv(indx: number, values: Float32Array | number[]): void;
-    vertexAttrib4f(indx: number, x: number, y: number, z: number, w: number): void;
-    vertexAttrib4fv(indx: number, values: Float32Array | number[]): void;
-    vertexAttribPointer(indx: number, size: number, type: number, normalized: boolean, stride: number, offset: number): void;
-    viewport(x: number, y: number, width: number, height: number): void;
-    readonly ACTIVE_ATTRIBUTES: number;
-    readonly ACTIVE_TEXTURE: number;
-    readonly ACTIVE_UNIFORMS: number;
-    readonly ALIASED_LINE_WIDTH_RANGE: number;
-    readonly ALIASED_POINT_SIZE_RANGE: number;
-    readonly ALPHA: number;
-    readonly ALPHA_BITS: number;
-    readonly ALWAYS: number;
-    readonly ARRAY_BUFFER: number;
-    readonly ARRAY_BUFFER_BINDING: number;
-    readonly ATTACHED_SHADERS: number;
-    readonly BACK: number;
-    readonly BLEND: number;
-    readonly BLEND_COLOR: number;
-    readonly BLEND_DST_ALPHA: number;
-    readonly BLEND_DST_RGB: number;
-    readonly BLEND_EQUATION: number;
-    readonly BLEND_EQUATION_ALPHA: number;
-    readonly BLEND_EQUATION_RGB: number;
-    readonly BLEND_SRC_ALPHA: number;
-    readonly BLEND_SRC_RGB: number;
-    readonly BLUE_BITS: number;
-    readonly BOOL: number;
-    readonly BOOL_VEC2: number;
-    readonly BOOL_VEC3: number;
-    readonly BOOL_VEC4: number;
-    readonly BROWSER_DEFAULT_WEBGL: number;
-    readonly BUFFER_SIZE: number;
-    readonly BUFFER_USAGE: number;
-    readonly BYTE: number;
-    readonly CCW: number;
-    readonly CLAMP_TO_EDGE: number;
-    readonly COLOR_ATTACHMENT0: number;
-    readonly COLOR_BUFFER_BIT: number;
-    readonly COLOR_CLEAR_VALUE: number;
-    readonly COLOR_WRITEMASK: number;
-    readonly COMPILE_STATUS: number;
-    readonly COMPRESSED_TEXTURE_FORMATS: number;
-    readonly CONSTANT_ALPHA: number;
-    readonly CONSTANT_COLOR: number;
-    readonly CONTEXT_LOST_WEBGL: number;
-    readonly CULL_FACE: number;
-    readonly CULL_FACE_MODE: number;
-    readonly CURRENT_PROGRAM: number;
-    readonly CURRENT_VERTEX_ATTRIB: number;
-    readonly CW: number;
-    readonly DECR: number;
-    readonly DECR_WRAP: number;
-    readonly DELETE_STATUS: number;
-    readonly DEPTH_ATTACHMENT: number;
-    readonly DEPTH_BITS: number;
-    readonly DEPTH_BUFFER_BIT: number;
-    readonly DEPTH_CLEAR_VALUE: number;
-    readonly DEPTH_COMPONENT: number;
-    readonly DEPTH_COMPONENT16: number;
-    readonly DEPTH_FUNC: number;
-    readonly DEPTH_RANGE: number;
-    readonly DEPTH_STENCIL: number;
-    readonly DEPTH_STENCIL_ATTACHMENT: number;
-    readonly DEPTH_TEST: number;
-    readonly DEPTH_WRITEMASK: number;
-    readonly DITHER: number;
-    readonly DONT_CARE: number;
-    readonly DST_ALPHA: number;
-    readonly DST_COLOR: number;
-    readonly DYNAMIC_DRAW: number;
-    readonly ELEMENT_ARRAY_BUFFER: number;
-    readonly ELEMENT_ARRAY_BUFFER_BINDING: number;
-    readonly EQUAL: number;
-    readonly FASTEST: number;
-    readonly FLOAT: number;
-    readonly FLOAT_MAT2: number;
-    readonly FLOAT_MAT3: number;
-    readonly FLOAT_MAT4: number;
-    readonly FLOAT_VEC2: number;
-    readonly FLOAT_VEC3: number;
-    readonly FLOAT_VEC4: number;
-    readonly FRAGMENT_SHADER: number;
-    readonly FRAMEBUFFER: number;
-    readonly FRAMEBUFFER_ATTACHMENT_OBJECT_NAME: number;
-    readonly FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE: number;
-    readonly FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE: number;
-    readonly FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL: number;
-    readonly FRAMEBUFFER_BINDING: number;
-    readonly FRAMEBUFFER_COMPLETE: number;
-    readonly FRAMEBUFFER_INCOMPLETE_ATTACHMENT: number;
-    readonly FRAMEBUFFER_INCOMPLETE_DIMENSIONS: number;
-    readonly FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT: number;
-    readonly FRAMEBUFFER_UNSUPPORTED: number;
-    readonly FRONT: number;
-    readonly FRONT_AND_BACK: number;
-    readonly FRONT_FACE: number;
-    readonly FUNC_ADD: number;
-    readonly FUNC_REVERSE_SUBTRACT: number;
-    readonly FUNC_SUBTRACT: number;
-    readonly GENERATE_MIPMAP_HINT: number;
-    readonly GEQUAL: number;
-    readonly GREATER: number;
-    readonly GREEN_BITS: number;
-    readonly HIGH_FLOAT: number;
-    readonly HIGH_INT: number;
-    readonly IMPLEMENTATION_COLOR_READ_FORMAT: number;
-    readonly IMPLEMENTATION_COLOR_READ_TYPE: number;
-    readonly INCR: number;
-    readonly INCR_WRAP: number;
-    readonly INT: number;
-    readonly INT_VEC2: number;
-    readonly INT_VEC3: number;
-    readonly INT_VEC4: number;
-    readonly INVALID_ENUM: number;
-    readonly INVALID_FRAMEBUFFER_OPERATION: number;
-    readonly INVALID_OPERATION: number;
-    readonly INVALID_VALUE: number;
-    readonly INVERT: number;
-    readonly KEEP: number;
-    readonly LEQUAL: number;
-    readonly LESS: number;
-    readonly LINEAR: number;
-    readonly LINEAR_MIPMAP_LINEAR: number;
-    readonly LINEAR_MIPMAP_NEAREST: number;
-    readonly LINES: number;
-    readonly LINE_LOOP: number;
-    readonly LINE_STRIP: number;
-    readonly LINE_WIDTH: number;
-    readonly LINK_STATUS: number;
-    readonly LOW_FLOAT: number;
-    readonly LOW_INT: number;
-    readonly LUMINANCE: number;
-    readonly LUMINANCE_ALPHA: number;
-    readonly MAX_COMBINED_TEXTURE_IMAGE_UNITS: number;
-    readonly MAX_CUBE_MAP_TEXTURE_SIZE: number;
-    readonly MAX_FRAGMENT_UNIFORM_VECTORS: number;
-    readonly MAX_RENDERBUFFER_SIZE: number;
-    readonly MAX_TEXTURE_IMAGE_UNITS: number;
-    readonly MAX_TEXTURE_SIZE: number;
-    readonly MAX_VARYING_VECTORS: number;
-    readonly MAX_VERTEX_ATTRIBS: number;
-    readonly MAX_VERTEX_TEXTURE_IMAGE_UNITS: number;
-    readonly MAX_VERTEX_UNIFORM_VECTORS: number;
-    readonly MAX_VIEWPORT_DIMS: number;
-    readonly MEDIUM_FLOAT: number;
-    readonly MEDIUM_INT: number;
-    readonly MIRRORED_REPEAT: number;
-    readonly NEAREST: number;
-    readonly NEAREST_MIPMAP_LINEAR: number;
-    readonly NEAREST_MIPMAP_NEAREST: number;
-    readonly NEVER: number;
-    readonly NICEST: number;
-    readonly NONE: number;
-    readonly NOTEQUAL: number;
-    readonly NO_ERROR: number;
-    readonly ONE: number;
-    readonly ONE_MINUS_CONSTANT_ALPHA: number;
-    readonly ONE_MINUS_CONSTANT_COLOR: number;
-    readonly ONE_MINUS_DST_ALPHA: number;
-    readonly ONE_MINUS_DST_COLOR: number;
-    readonly ONE_MINUS_SRC_ALPHA: number;
-    readonly ONE_MINUS_SRC_COLOR: number;
-    readonly OUT_OF_MEMORY: number;
-    readonly PACK_ALIGNMENT: number;
-    readonly POINTS: number;
-    readonly POLYGON_OFFSET_FACTOR: number;
-    readonly POLYGON_OFFSET_FILL: number;
-    readonly POLYGON_OFFSET_UNITS: number;
-    readonly RED_BITS: number;
-    readonly RENDERBUFFER: number;
-    readonly RENDERBUFFER_ALPHA_SIZE: number;
-    readonly RENDERBUFFER_BINDING: number;
-    readonly RENDERBUFFER_BLUE_SIZE: number;
-    readonly RENDERBUFFER_DEPTH_SIZE: number;
-    readonly RENDERBUFFER_GREEN_SIZE: number;
-    readonly RENDERBUFFER_HEIGHT: number;
-    readonly RENDERBUFFER_INTERNAL_FORMAT: number;
-    readonly RENDERBUFFER_RED_SIZE: number;
-    readonly RENDERBUFFER_STENCIL_SIZE: number;
-    readonly RENDERBUFFER_WIDTH: number;
-    readonly RENDERER: number;
-    readonly REPEAT: number;
-    readonly REPLACE: number;
-    readonly RGB: number;
-    readonly RGB565: number;
-    readonly RGB5_A1: number;
-    readonly RGBA: number;
-    readonly RGBA4: number;
-    readonly SAMPLER_2D: number;
-    readonly SAMPLER_CUBE: number;
-    readonly SAMPLES: number;
-    readonly SAMPLE_ALPHA_TO_COVERAGE: number;
-    readonly SAMPLE_BUFFERS: number;
-    readonly SAMPLE_COVERAGE: number;
-    readonly SAMPLE_COVERAGE_INVERT: number;
-    readonly SAMPLE_COVERAGE_VALUE: number;
-    readonly SCISSOR_BOX: number;
-    readonly SCISSOR_TEST: number;
-    readonly SHADER_TYPE: number;
-    readonly SHADING_LANGUAGE_VERSION: number;
-    readonly SHORT: number;
-    readonly SRC_ALPHA: number;
-    readonly SRC_ALPHA_SATURATE: number;
-    readonly SRC_COLOR: number;
-    readonly STATIC_DRAW: number;
-    readonly STENCIL_ATTACHMENT: number;
-    readonly STENCIL_BACK_FAIL: number;
-    readonly STENCIL_BACK_FUNC: number;
-    readonly STENCIL_BACK_PASS_DEPTH_FAIL: number;
-    readonly STENCIL_BACK_PASS_DEPTH_PASS: number;
-    readonly STENCIL_BACK_REF: number;
-    readonly STENCIL_BACK_VALUE_MASK: number;
-    readonly STENCIL_BACK_WRITEMASK: number;
-    readonly STENCIL_BITS: number;
-    readonly STENCIL_BUFFER_BIT: number;
-    readonly STENCIL_CLEAR_VALUE: number;
-    readonly STENCIL_FAIL: number;
-    readonly STENCIL_FUNC: number;
-    readonly STENCIL_INDEX: number;
-    readonly STENCIL_INDEX8: number;
-    readonly STENCIL_PASS_DEPTH_FAIL: number;
-    readonly STENCIL_PASS_DEPTH_PASS: number;
-    readonly STENCIL_REF: number;
-    readonly STENCIL_TEST: number;
-    readonly STENCIL_VALUE_MASK: number;
-    readonly STENCIL_WRITEMASK: number;
-    readonly STREAM_DRAW: number;
-    readonly SUBPIXEL_BITS: number;
-    readonly TEXTURE: number;
-    readonly TEXTURE0: number;
-    readonly TEXTURE1: number;
-    readonly TEXTURE10: number;
-    readonly TEXTURE11: number;
-    readonly TEXTURE12: number;
-    readonly TEXTURE13: number;
-    readonly TEXTURE14: number;
-    readonly TEXTURE15: number;
-    readonly TEXTURE16: number;
-    readonly TEXTURE17: number;
-    readonly TEXTURE18: number;
-    readonly TEXTURE19: number;
-    readonly TEXTURE2: number;
-    readonly TEXTURE20: number;
-    readonly TEXTURE21: number;
-    readonly TEXTURE22: number;
-    readonly TEXTURE23: number;
-    readonly TEXTURE24: number;
-    readonly TEXTURE25: number;
-    readonly TEXTURE26: number;
-    readonly TEXTURE27: number;
-    readonly TEXTURE28: number;
-    readonly TEXTURE29: number;
-    readonly TEXTURE3: number;
-    readonly TEXTURE30: number;
-    readonly TEXTURE31: number;
-    readonly TEXTURE4: number;
-    readonly TEXTURE5: number;
-    readonly TEXTURE6: number;
-    readonly TEXTURE7: number;
-    readonly TEXTURE8: number;
-    readonly TEXTURE9: number;
-    readonly TEXTURE_2D: number;
-    readonly TEXTURE_BINDING_2D: number;
-    readonly TEXTURE_BINDING_CUBE_MAP: number;
-    readonly TEXTURE_CUBE_MAP: number;
-    readonly TEXTURE_CUBE_MAP_NEGATIVE_X: number;
-    readonly TEXTURE_CUBE_MAP_NEGATIVE_Y: number;
-    readonly TEXTURE_CUBE_MAP_NEGATIVE_Z: number;
-    readonly TEXTURE_CUBE_MAP_POSITIVE_X: number;
-    readonly TEXTURE_CUBE_MAP_POSITIVE_Y: number;
-    readonly TEXTURE_CUBE_MAP_POSITIVE_Z: number;
-    readonly TEXTURE_MAG_FILTER: number;
-    readonly TEXTURE_MIN_FILTER: number;
-    readonly TEXTURE_WRAP_S: number;
-    readonly TEXTURE_WRAP_T: number;
-    readonly TRIANGLES: number;
-    readonly TRIANGLE_FAN: number;
-    readonly TRIANGLE_STRIP: number;
-    readonly UNPACK_ALIGNMENT: number;
-    readonly UNPACK_COLORSPACE_CONVERSION_WEBGL: number;
-    readonly UNPACK_FLIP_Y_WEBGL: number;
-    readonly UNPACK_PREMULTIPLY_ALPHA_WEBGL: number;
-    readonly UNSIGNED_BYTE: number;
-    readonly UNSIGNED_INT: number;
-    readonly UNSIGNED_SHORT: number;
-    readonly UNSIGNED_SHORT_4_4_4_4: number;
-    readonly UNSIGNED_SHORT_5_5_5_1: number;
-    readonly UNSIGNED_SHORT_5_6_5: number;
-    readonly VALIDATE_STATUS: number;
-    readonly VENDOR: number;
-    readonly VERSION: number;
-    readonly VERTEX_ATTRIB_ARRAY_BUFFER_BINDING: number;
-    readonly VERTEX_ATTRIB_ARRAY_ENABLED: number;
-    readonly VERTEX_ATTRIB_ARRAY_NORMALIZED: number;
-    readonly VERTEX_ATTRIB_ARRAY_POINTER: number;
-    readonly VERTEX_ATTRIB_ARRAY_SIZE: number;
-    readonly VERTEX_ATTRIB_ARRAY_STRIDE: number;
-    readonly VERTEX_ATTRIB_ARRAY_TYPE: number;
-    readonly VERTEX_SHADER: number;
-    readonly VIEWPORT: number;
-    readonly ZERO: number;
-}
-
-declare var WebGLRenderingContext: {
-    prototype: WebGLRenderingContext;
-    new(): WebGLRenderingContext;
-    readonly ACTIVE_ATTRIBUTES: number;
-    readonly ACTIVE_TEXTURE: number;
-    readonly ACTIVE_UNIFORMS: number;
-    readonly ALIASED_LINE_WIDTH_RANGE: number;
-    readonly ALIASED_POINT_SIZE_RANGE: number;
-    readonly ALPHA: number;
-    readonly ALPHA_BITS: number;
-    readonly ALWAYS: number;
-    readonly ARRAY_BUFFER: number;
-    readonly ARRAY_BUFFER_BINDING: number;
-    readonly ATTACHED_SHADERS: number;
-    readonly BACK: number;
-    readonly BLEND: number;
-    readonly BLEND_COLOR: number;
-    readonly BLEND_DST_ALPHA: number;
-    readonly BLEND_DST_RGB: number;
-    readonly BLEND_EQUATION: number;
-    readonly BLEND_EQUATION_ALPHA: number;
-    readonly BLEND_EQUATION_RGB: number;
-    readonly BLEND_SRC_ALPHA: number;
-    readonly BLEND_SRC_RGB: number;
-    readonly BLUE_BITS: number;
-    readonly BOOL: number;
-    readonly BOOL_VEC2: number;
-    readonly BOOL_VEC3: number;
-    readonly BOOL_VEC4: number;
-    readonly BROWSER_DEFAULT_WEBGL: number;
-    readonly BUFFER_SIZE: number;
-    readonly BUFFER_USAGE: number;
-    readonly BYTE: number;
-    readonly CCW: number;
-    readonly CLAMP_TO_EDGE: number;
-    readonly COLOR_ATTACHMENT0: number;
-    readonly COLOR_BUFFER_BIT: number;
-    readonly COLOR_CLEAR_VALUE: number;
-    readonly COLOR_WRITEMASK: number;
-    readonly COMPILE_STATUS: number;
-    readonly COMPRESSED_TEXTURE_FORMATS: number;
-    readonly CONSTANT_ALPHA: number;
-    readonly CONSTANT_COLOR: number;
-    readonly CONTEXT_LOST_WEBGL: number;
-    readonly CULL_FACE: number;
-    readonly CULL_FACE_MODE: number;
-    readonly CURRENT_PROGRAM: number;
-    readonly CURRENT_VERTEX_ATTRIB: number;
-    readonly CW: number;
-    readonly DECR: number;
-    readonly DECR_WRAP: number;
-    readonly DELETE_STATUS: number;
-    readonly DEPTH_ATTACHMENT: number;
-    readonly DEPTH_BITS: number;
-    readonly DEPTH_BUFFER_BIT: number;
-    readonly DEPTH_CLEAR_VALUE: number;
-    readonly DEPTH_COMPONENT: number;
-    readonly DEPTH_COMPONENT16: number;
-    readonly DEPTH_FUNC: number;
-    readonly DEPTH_RANGE: number;
-    readonly DEPTH_STENCIL: number;
-    readonly DEPTH_STENCIL_ATTACHMENT: number;
-    readonly DEPTH_TEST: number;
-    readonly DEPTH_WRITEMASK: number;
-    readonly DITHER: number;
-    readonly DONT_CARE: number;
-    readonly DST_ALPHA: number;
-    readonly DST_COLOR: number;
-    readonly DYNAMIC_DRAW: number;
-    readonly ELEMENT_ARRAY_BUFFER: number;
-    readonly ELEMENT_ARRAY_BUFFER_BINDING: number;
-    readonly EQUAL: number;
-    readonly FASTEST: number;
-    readonly FLOAT: number;
-    readonly FLOAT_MAT2: number;
-    readonly FLOAT_MAT3: number;
-    readonly FLOAT_MAT4: number;
-    readonly FLOAT_VEC2: number;
-    readonly FLOAT_VEC3: number;
-    readonly FLOAT_VEC4: number;
-    readonly FRAGMENT_SHADER: number;
-    readonly FRAMEBUFFER: number;
-    readonly FRAMEBUFFER_ATTACHMENT_OBJECT_NAME: number;
-    readonly FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE: number;
-    readonly FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE: number;
-    readonly FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL: number;
-    readonly FRAMEBUFFER_BINDING: number;
-    readonly FRAMEBUFFER_COMPLETE: number;
-    readonly FRAMEBUFFER_INCOMPLETE_ATTACHMENT: number;
-    readonly FRAMEBUFFER_INCOMPLETE_DIMENSIONS: number;
-    readonly FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT: number;
-    readonly FRAMEBUFFER_UNSUPPORTED: number;
-    readonly FRONT: number;
-    readonly FRONT_AND_BACK: number;
-    readonly FRONT_FACE: number;
-    readonly FUNC_ADD: number;
-    readonly FUNC_REVERSE_SUBTRACT: number;
-    readonly FUNC_SUBTRACT: number;
-    readonly GENERATE_MIPMAP_HINT: number;
-    readonly GEQUAL: number;
-    readonly GREATER: number;
-    readonly GREEN_BITS: number;
-    readonly HIGH_FLOAT: number;
-    readonly HIGH_INT: number;
-    readonly IMPLEMENTATION_COLOR_READ_FORMAT: number;
-    readonly IMPLEMENTATION_COLOR_READ_TYPE: number;
-    readonly INCR: number;
-    readonly INCR_WRAP: number;
-    readonly INT: number;
-    readonly INT_VEC2: number;
-    readonly INT_VEC3: number;
-    readonly INT_VEC4: number;
-    readonly INVALID_ENUM: number;
-    readonly INVALID_FRAMEBUFFER_OPERATION: number;
-    readonly INVALID_OPERATION: number;
-    readonly INVALID_VALUE: number;
-    readonly INVERT: number;
-    readonly KEEP: number;
-    readonly LEQUAL: number;
-    readonly LESS: number;
-    readonly LINEAR: number;
-    readonly LINEAR_MIPMAP_LINEAR: number;
-    readonly LINEAR_MIPMAP_NEAREST: number;
-    readonly LINES: number;
-    readonly LINE_LOOP: number;
-    readonly LINE_STRIP: number;
-    readonly LINE_WIDTH: number;
-    readonly LINK_STATUS: number;
-    readonly LOW_FLOAT: number;
-    readonly LOW_INT: number;
-    readonly LUMINANCE: number;
-    readonly LUMINANCE_ALPHA: number;
-    readonly MAX_COMBINED_TEXTURE_IMAGE_UNITS: number;
-    readonly MAX_CUBE_MAP_TEXTURE_SIZE: number;
-    readonly MAX_FRAGMENT_UNIFORM_VECTORS: number;
-    readonly MAX_RENDERBUFFER_SIZE: number;
-    readonly MAX_TEXTURE_IMAGE_UNITS: number;
-    readonly MAX_TEXTURE_SIZE: number;
-    readonly MAX_VARYING_VECTORS: number;
-    readonly MAX_VERTEX_ATTRIBS: number;
-    readonly MAX_VERTEX_TEXTURE_IMAGE_UNITS: number;
-    readonly MAX_VERTEX_UNIFORM_VECTORS: number;
-    readonly MAX_VIEWPORT_DIMS: number;
-    readonly MEDIUM_FLOAT: number;
-    readonly MEDIUM_INT: number;
-    readonly MIRRORED_REPEAT: number;
-    readonly NEAREST: number;
-    readonly NEAREST_MIPMAP_LINEAR: number;
-    readonly NEAREST_MIPMAP_NEAREST: number;
-    readonly NEVER: number;
-    readonly NICEST: number;
-    readonly NONE: number;
-    readonly NOTEQUAL: number;
-    readonly NO_ERROR: number;
-    readonly ONE: number;
-    readonly ONE_MINUS_CONSTANT_ALPHA: number;
-    readonly ONE_MINUS_CONSTANT_COLOR: number;
-    readonly ONE_MINUS_DST_ALPHA: number;
-    readonly ONE_MINUS_DST_COLOR: number;
-    readonly ONE_MINUS_SRC_ALPHA: number;
-    readonly ONE_MINUS_SRC_COLOR: number;
-    readonly OUT_OF_MEMORY: number;
-    readonly PACK_ALIGNMENT: number;
-    readonly POINTS: number;
-    readonly POLYGON_OFFSET_FACTOR: number;
-    readonly POLYGON_OFFSET_FILL: number;
-    readonly POLYGON_OFFSET_UNITS: number;
-    readonly RED_BITS: number;
-    readonly RENDERBUFFER: number;
-    readonly RENDERBUFFER_ALPHA_SIZE: number;
-    readonly RENDERBUFFER_BINDING: number;
-    readonly RENDERBUFFER_BLUE_SIZE: number;
-    readonly RENDERBUFFER_DEPTH_SIZE: number;
-    readonly RENDERBUFFER_GREEN_SIZE: number;
-    readonly RENDERBUFFER_HEIGHT: number;
-    readonly RENDERBUFFER_INTERNAL_FORMAT: number;
-    readonly RENDERBUFFER_RED_SIZE: number;
-    readonly RENDERBUFFER_STENCIL_SIZE: number;
-    readonly RENDERBUFFER_WIDTH: number;
-    readonly RENDERER: number;
-    readonly REPEAT: number;
-    readonly REPLACE: number;
-    readonly RGB: number;
-    readonly RGB565: number;
-    readonly RGB5_A1: number;
-    readonly RGBA: number;
-    readonly RGBA4: number;
-    readonly SAMPLER_2D: number;
-    readonly SAMPLER_CUBE: number;
-    readonly SAMPLES: number;
-    readonly SAMPLE_ALPHA_TO_COVERAGE: number;
-    readonly SAMPLE_BUFFERS: number;
-    readonly SAMPLE_COVERAGE: number;
-    readonly SAMPLE_COVERAGE_INVERT: number;
-    readonly SAMPLE_COVERAGE_VALUE: number;
-    readonly SCISSOR_BOX: number;
-    readonly SCISSOR_TEST: number;
-    readonly SHADER_TYPE: number;
-    readonly SHADING_LANGUAGE_VERSION: number;
-    readonly SHORT: number;
-    readonly SRC_ALPHA: number;
-    readonly SRC_ALPHA_SATURATE: number;
-    readonly SRC_COLOR: number;
-    readonly STATIC_DRAW: number;
-    readonly STENCIL_ATTACHMENT: number;
-    readonly STENCIL_BACK_FAIL: number;
-    readonly STENCIL_BACK_FUNC: number;
-    readonly STENCIL_BACK_PASS_DEPTH_FAIL: number;
-    readonly STENCIL_BACK_PASS_DEPTH_PASS: number;
-    readonly STENCIL_BACK_REF: number;
-    readonly STENCIL_BACK_VALUE_MASK: number;
-    readonly STENCIL_BACK_WRITEMASK: number;
-    readonly STENCIL_BITS: number;
-    readonly STENCIL_BUFFER_BIT: number;
-    readonly STENCIL_CLEAR_VALUE: number;
-    readonly STENCIL_FAIL: number;
-    readonly STENCIL_FUNC: number;
-    readonly STENCIL_INDEX: number;
-    readonly STENCIL_INDEX8: number;
-    readonly STENCIL_PASS_DEPTH_FAIL: number;
-    readonly STENCIL_PASS_DEPTH_PASS: number;
-    readonly STENCIL_REF: number;
-    readonly STENCIL_TEST: number;
-    readonly STENCIL_VALUE_MASK: number;
-    readonly STENCIL_WRITEMASK: number;
-    readonly STREAM_DRAW: number;
-    readonly SUBPIXEL_BITS: number;
-    readonly TEXTURE: number;
-    readonly TEXTURE0: number;
-    readonly TEXTURE1: number;
-    readonly TEXTURE10: number;
-    readonly TEXTURE11: number;
-    readonly TEXTURE12: number;
-    readonly TEXTURE13: number;
-    readonly TEXTURE14: number;
-    readonly TEXTURE15: number;
-    readonly TEXTURE16: number;
-    readonly TEXTURE17: number;
-    readonly TEXTURE18: number;
-    readonly TEXTURE19: number;
-    readonly TEXTURE2: number;
-    readonly TEXTURE20: number;
-    readonly TEXTURE21: number;
-    readonly TEXTURE22: number;
-    readonly TEXTURE23: number;
-    readonly TEXTURE24: number;
-    readonly TEXTURE25: number;
-    readonly TEXTURE26: number;
-    readonly TEXTURE27: number;
-    readonly TEXTURE28: number;
-    readonly TEXTURE29: number;
-    readonly TEXTURE3: number;
-    readonly TEXTURE30: number;
-    readonly TEXTURE31: number;
-    readonly TEXTURE4: number;
-    readonly TEXTURE5: number;
-    readonly TEXTURE6: number;
-    readonly TEXTURE7: number;
-    readonly TEXTURE8: number;
-    readonly TEXTURE9: number;
-    readonly TEXTURE_2D: number;
-    readonly TEXTURE_BINDING_2D: number;
-    readonly TEXTURE_BINDING_CUBE_MAP: number;
-    readonly TEXTURE_CUBE_MAP: number;
-    readonly TEXTURE_CUBE_MAP_NEGATIVE_X: number;
-    readonly TEXTURE_CUBE_MAP_NEGATIVE_Y: number;
-    readonly TEXTURE_CUBE_MAP_NEGATIVE_Z: number;
-    readonly TEXTURE_CUBE_MAP_POSITIVE_X: number;
-    readonly TEXTURE_CUBE_MAP_POSITIVE_Y: number;
-    readonly TEXTURE_CUBE_MAP_POSITIVE_Z: number;
-    readonly TEXTURE_MAG_FILTER: number;
-    readonly TEXTURE_MIN_FILTER: number;
-    readonly TEXTURE_WRAP_S: number;
-    readonly TEXTURE_WRAP_T: number;
-    readonly TRIANGLES: number;
-    readonly TRIANGLE_FAN: number;
-    readonly TRIANGLE_STRIP: number;
-    readonly UNPACK_ALIGNMENT: number;
-    readonly UNPACK_COLORSPACE_CONVERSION_WEBGL: number;
-    readonly UNPACK_FLIP_Y_WEBGL: number;
-    readonly UNPACK_PREMULTIPLY_ALPHA_WEBGL: number;
-    readonly UNSIGNED_BYTE: number;
-    readonly UNSIGNED_INT: number;
-    readonly UNSIGNED_SHORT: number;
-    readonly UNSIGNED_SHORT_4_4_4_4: number;
-    readonly UNSIGNED_SHORT_5_5_5_1: number;
-    readonly UNSIGNED_SHORT_5_6_5: number;
-    readonly VALIDATE_STATUS: number;
-    readonly VENDOR: number;
-    readonly VERSION: number;
-    readonly VERTEX_ATTRIB_ARRAY_BUFFER_BINDING: number;
-    readonly VERTEX_ATTRIB_ARRAY_ENABLED: number;
-    readonly VERTEX_ATTRIB_ARRAY_NORMALIZED: number;
-    readonly VERTEX_ATTRIB_ARRAY_POINTER: number;
-    readonly VERTEX_ATTRIB_ARRAY_SIZE: number;
-    readonly VERTEX_ATTRIB_ARRAY_STRIDE: number;
-    readonly VERTEX_ATTRIB_ARRAY_TYPE: number;
-    readonly VERTEX_SHADER: number;
-    readonly VIEWPORT: number;
-    readonly ZERO: number;
-}
-
-interface WebGLShader extends WebGLObject {
-}
-
-declare var WebGLShader: {
-    prototype: WebGLShader;
-    new(): WebGLShader;
-}
-
-interface WebGLShaderPrecisionFormat {
-    readonly precision: number;
-    readonly rangeMax: number;
-    readonly rangeMin: number;
-}
-
-declare var WebGLShaderPrecisionFormat: {
-    prototype: WebGLShaderPrecisionFormat;
-    new(): WebGLShaderPrecisionFormat;
-}
-
-interface WebGLTexture extends WebGLObject {
-}
-
-declare var WebGLTexture: {
-    prototype: WebGLTexture;
-    new(): WebGLTexture;
-}
-
-interface WebGLUniformLocation {
-}
-
-declare var WebGLUniformLocation: {
-    prototype: WebGLUniformLocation;
-    new(): WebGLUniformLocation;
-}
-
-interface WebKitCSSMatrix {
-    a: number;
-    b: number;
-    c: number;
-    d: number;
-    e: number;
-    f: number;
-    m11: number;
-    m12: number;
-    m13: number;
-    m14: number;
-    m21: number;
-    m22: number;
-    m23: number;
-    m24: number;
-    m31: number;
-    m32: number;
-    m33: number;
-    m34: number;
-    m41: number;
-    m42: number;
-    m43: number;
-    m44: number;
-    inverse(): WebKitCSSMatrix;
-    multiply(secondMatrix: WebKitCSSMatrix): WebKitCSSMatrix;
-    rotate(angleX: number, angleY?: number, angleZ?: number): WebKitCSSMatrix;
-    rotateAxisAngle(x: number, y: number, z: number, angle: number): WebKitCSSMatrix;
-    scale(scaleX: number, scaleY?: number, scaleZ?: number): WebKitCSSMatrix;
-    setMatrixValue(value: string): void;
-    skewX(angle: number): WebKitCSSMatrix;
-    skewY(angle: number): WebKitCSSMatrix;
-    toString(): string;
-    translate(x: number, y: number, z?: number): WebKitCSSMatrix;
-}
-
-declare var WebKitCSSMatrix: {
-    prototype: WebKitCSSMatrix;
-    new(text?: string): WebKitCSSMatrix;
-}
-
-interface WebKitPoint {
-    x: number;
-    y: number;
-}
-
-declare var WebKitPoint: {
-    prototype: WebKitPoint;
-    new(x?: number, y?: number): WebKitPoint;
-}
-
-interface WebSocket extends EventTarget {
-    binaryType: string;
-    readonly bufferedAmount: number;
-    readonly extensions: string;
-    onclose: (this: this, ev: CloseEvent) => any;
-    onerror: (this: this, ev: ErrorEvent) => any;
-    onmessage: (this: this, ev: MessageEvent) => any;
-    onopen: (this: this, ev: Event) => any;
-    readonly protocol: string;
-    readonly readyState: number;
-    readonly url: string;
-    close(code?: number, reason?: string): void;
-    send(data: any): void;
-    readonly CLOSED: number;
-    readonly CLOSING: number;
-    readonly CONNECTING: number;
-    readonly OPEN: number;
-    addEventListener(type: "close", listener: (this: this, ev: CloseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "message", listener: (this: this, ev: MessageEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "open", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var WebSocket: {
-    prototype: WebSocket;
-    new(url: string, protocols?: string | string[]): WebSocket;
-    readonly CLOSED: number;
-    readonly CLOSING: number;
-    readonly CONNECTING: number;
-    readonly OPEN: number;
-}
-
-interface WheelEvent extends MouseEvent {
-    readonly deltaMode: number;
-    readonly deltaX: number;
-    readonly deltaY: number;
-    readonly deltaZ: number;
-    readonly wheelDelta: number;
-    readonly wheelDeltaX: number;
-    readonly wheelDeltaY: number;
-    getCurrentPoint(element: Element): void;
-    initWheelEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, buttonArg: number, relatedTargetArg: EventTarget, modifiersListArg: string, deltaXArg: number, deltaYArg: number, deltaZArg: number, deltaMode: number): void;
-    readonly DOM_DELTA_LINE: number;
-    readonly DOM_DELTA_PAGE: number;
-    readonly DOM_DELTA_PIXEL: number;
-}
-
-declare var WheelEvent: {
-    prototype: WheelEvent;
-    new(typeArg: string, eventInitDict?: WheelEventInit): WheelEvent;
-    readonly DOM_DELTA_LINE: number;
-    readonly DOM_DELTA_PAGE: number;
-    readonly DOM_DELTA_PIXEL: number;
-}
-
-interface Window extends EventTarget, WindowTimers, WindowSessionStorage, WindowLocalStorage, WindowConsole, GlobalEventHandlers, IDBEnvironment, WindowBase64 {
-    readonly applicationCache: ApplicationCache;
-    readonly clientInformation: Navigator;
-    readonly closed: boolean;
-    readonly crypto: Crypto;
-    defaultStatus: string;
-    readonly devicePixelRatio: number;
-    readonly doNotTrack: string;
-    readonly document: Document;
-    event: Event;
-    readonly external: External;
-    readonly frameElement: Element;
-    readonly frames: Window;
-    readonly history: History;
-    readonly innerHeight: number;
-    readonly innerWidth: number;
-    readonly length: number;
-    readonly location: Location;
-    readonly locationbar: BarProp;
-    readonly menubar: BarProp;
-    readonly msCredentials: MSCredentials;
-    name: string;
-    readonly navigator: Navigator;
-    offscreenBuffering: string | boolean;
-    onabort: (this: this, ev: UIEvent) => any;
-    onafterprint: (this: this, ev: Event) => any;
-    onbeforeprint: (this: this, ev: Event) => any;
-    onbeforeunload: (this: this, ev: BeforeUnloadEvent) => any;
-    onblur: (this: this, ev: FocusEvent) => any;
-    oncanplay: (this: this, ev: Event) => any;
-    oncanplaythrough: (this: this, ev: Event) => any;
-    onchange: (this: this, ev: Event) => any;
-    onclick: (this: this, ev: MouseEvent) => any;
-    oncompassneedscalibration: (this: this, ev: Event) => any;
-    oncontextmenu: (this: this, ev: PointerEvent) => any;
-    ondblclick: (this: this, ev: MouseEvent) => any;
-    ondevicelight: (this: this, ev: DeviceLightEvent) => any;
-    ondevicemotion: (this: this, ev: DeviceMotionEvent) => any;
-    ondeviceorientation: (this: this, ev: DeviceOrientationEvent) => any;
-    ondrag: (this: this, ev: DragEvent) => any;
-    ondragend: (this: this, ev: DragEvent) => any;
-    ondragenter: (this: this, ev: DragEvent) => any;
-    ondragleave: (this: this, ev: DragEvent) => any;
-    ondragover: (this: this, ev: DragEvent) => any;
-    ondragstart: (this: this, ev: DragEvent) => any;
-    ondrop: (this: this, ev: DragEvent) => any;
-    ondurationchange: (this: this, ev: Event) => any;
-    onemptied: (this: this, ev: Event) => any;
-    onended: (this: this, ev: MediaStreamErrorEvent) => any;
-    onerror: ErrorEventHandler;
-    onfocus: (this: this, ev: FocusEvent) => any;
-    onhashchange: (this: this, ev: HashChangeEvent) => any;
-    oninput: (this: this, ev: Event) => any;
-    oninvalid: (this: this, ev: Event) => any;
-    onkeydown: (this: this, ev: KeyboardEvent) => any;
-    onkeypress: (this: this, ev: KeyboardEvent) => any;
-    onkeyup: (this: this, ev: KeyboardEvent) => any;
-    onload: (this: this, ev: Event) => any;
-    onloadeddata: (this: this, ev: Event) => any;
-    onloadedmetadata: (this: this, ev: Event) => any;
-    onloadstart: (this: this, ev: Event) => any;
-    onmessage: (this: this, ev: MessageEvent) => any;
-    onmousedown: (this: this, ev: MouseEvent) => any;
-    onmouseenter: (this: this, ev: MouseEvent) => any;
-    onmouseleave: (this: this, ev: MouseEvent) => any;
-    onmousemove: (this: this, ev: MouseEvent) => any;
-    onmouseout: (this: this, ev: MouseEvent) => any;
-    onmouseover: (this: this, ev: MouseEvent) => any;
-    onmouseup: (this: this, ev: MouseEvent) => any;
-    onmousewheel: (this: this, ev: WheelEvent) => any;
-    onmsgesturechange: (this: this, ev: MSGestureEvent) => any;
-    onmsgesturedoubletap: (this: this, ev: MSGestureEvent) => any;
-    onmsgestureend: (this: this, ev: MSGestureEvent) => any;
-    onmsgesturehold: (this: this, ev: MSGestureEvent) => any;
-    onmsgesturestart: (this: this, ev: MSGestureEvent) => any;
-    onmsgesturetap: (this: this, ev: MSGestureEvent) => any;
-    onmsinertiastart: (this: this, ev: MSGestureEvent) => any;
-    onmspointercancel: (this: this, ev: MSPointerEvent) => any;
-    onmspointerdown: (this: this, ev: MSPointerEvent) => any;
-    onmspointerenter: (this: this, ev: MSPointerEvent) => any;
-    onmspointerleave: (this: this, ev: MSPointerEvent) => any;
-    onmspointermove: (this: this, ev: MSPointerEvent) => any;
-    onmspointerout: (this: this, ev: MSPointerEvent) => any;
-    onmspointerover: (this: this, ev: MSPointerEvent) => any;
-    onmspointerup: (this: this, ev: MSPointerEvent) => any;
-    onoffline: (this: this, ev: Event) => any;
-    ononline: (this: this, ev: Event) => any;
-    onorientationchange: (this: this, ev: Event) => any;
-    onpagehide: (this: this, ev: PageTransitionEvent) => any;
-    onpageshow: (this: this, ev: PageTransitionEvent) => any;
-    onpause: (this: this, ev: Event) => any;
-    onplay: (this: this, ev: Event) => any;
-    onplaying: (this: this, ev: Event) => any;
-    onpopstate: (this: this, ev: PopStateEvent) => any;
-    onprogress: (this: this, ev: ProgressEvent) => any;
-    onratechange: (this: this, ev: Event) => any;
-    onreadystatechange: (this: this, ev: ProgressEvent) => any;
-    onreset: (this: this, ev: Event) => any;
-    onresize: (this: this, ev: UIEvent) => any;
-    onscroll: (this: this, ev: UIEvent) => any;
-    onseeked: (this: this, ev: Event) => any;
-    onseeking: (this: this, ev: Event) => any;
-    onselect: (this: this, ev: UIEvent) => any;
-    onstalled: (this: this, ev: Event) => any;
-    onstorage: (this: this, ev: StorageEvent) => any;
-    onsubmit: (this: this, ev: Event) => any;
-    onsuspend: (this: this, ev: Event) => any;
-    ontimeupdate: (this: this, ev: Event) => any;
-    ontouchcancel: (ev: TouchEvent) => any;
-    ontouchend: (ev: TouchEvent) => any;
-    ontouchmove: (ev: TouchEvent) => any;
-    ontouchstart: (ev: TouchEvent) => any;
-    onunload: (this: this, ev: Event) => any;
-    onvolumechange: (this: this, ev: Event) => any;
-    onwaiting: (this: this, ev: Event) => any;
-    opener: any;
-    orientation: string | number;
-    readonly outerHeight: number;
-    readonly outerWidth: number;
-    readonly pageXOffset: number;
-    readonly pageYOffset: number;
-    readonly parent: Window;
-    readonly performance: Performance;
-    readonly personalbar: BarProp;
-    readonly screen: Screen;
-    readonly screenLeft: number;
-    readonly screenTop: number;
-    readonly screenX: number;
-    readonly screenY: number;
-    readonly scrollX: number;
-    readonly scrollY: number;
-    readonly scrollbars: BarProp;
-    readonly self: Window;
-    status: string;
-    readonly statusbar: BarProp;
-    readonly styleMedia: StyleMedia;
-    readonly toolbar: BarProp;
-    readonly top: Window;
-    readonly window: Window;
-    URL: typeof URL;
-    Blob: typeof Blob;
-    alert(message?: any): void;
-    blur(): void;
-    cancelAnimationFrame(handle: number): void;
-    captureEvents(): void;
-    close(): void;
-    confirm(message?: string): boolean;
-    focus(): void;
-    getComputedStyle(elt: Element, pseudoElt?: string): CSSStyleDeclaration;
-    getMatchedCSSRules(elt: Element, pseudoElt?: string): CSSRuleList;
-    getSelection(): Selection;
-    matchMedia(mediaQuery: string): MediaQueryList;
-    moveBy(x?: number, y?: number): void;
-    moveTo(x?: number, y?: number): void;
-    msWriteProfilerMark(profilerMarkName: string): void;
-    open(url?: string, target?: string, features?: string, replace?: boolean): Window;
-    postMessage(message: any, targetOrigin: string, transfer?: any[]): void;
-    print(): void;
-    prompt(message?: string, _default?: string): string | null;
-    releaseEvents(): void;
-    requestAnimationFrame(callback: FrameRequestCallback): number;
-    resizeBy(x?: number, y?: number): void;
-    resizeTo(x?: number, y?: number): void;
-    scroll(x?: number, y?: number): void;
-    scrollBy(x?: number, y?: number): void;
-    scrollTo(x?: number, y?: number): void;
-    webkitCancelAnimationFrame(handle: number): void;
-    webkitConvertPointFromNodeToPage(node: Node, pt: WebKitPoint): WebKitPoint;
-    webkitConvertPointFromPageToNode(node: Node, pt: WebKitPoint): WebKitPoint;
-    webkitRequestAnimationFrame(callback: FrameRequestCallback): number;
-    scroll(options?: ScrollToOptions): void;
-    scrollTo(options?: ScrollToOptions): void;
-    scrollBy(options?: ScrollToOptions): void;
-    addEventListener(type: "MSGestureChange", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureDoubleTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureEnd", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureHold", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSGestureTap", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSInertiaStart", listener: (this: this, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerCancel", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerDown", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerEnter", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerLeave", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerMove", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOut", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerOver", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "MSPointerUp", listener: (this: this, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "abort", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "afterprint", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforeprint", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "beforeunload", listener: (this: this, ev: BeforeUnloadEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "blur", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplay", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "canplaythrough", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "change", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "click", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "compassneedscalibration", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "contextmenu", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dblclick", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "devicelight", listener: (this: this, ev: DeviceLightEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "devicemotion", listener: (this: this, ev: DeviceMotionEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "deviceorientation", listener: (this: this, ev: DeviceOrientationEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drag", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragend", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragenter", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragleave", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragover", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "dragstart", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "drop", listener: (this: this, ev: DragEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "durationchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "emptied", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "ended", listener: (this: this, ev: MediaStreamErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "focus", listener: (this: this, ev: FocusEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "hashchange", listener: (this: this, ev: HashChangeEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "input", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "invalid", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "keydown", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keypress", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "keyup", listener: (this: this, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadeddata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadedmetadata", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "message", listener: (this: this, ev: MessageEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousedown", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseenter", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseleave", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousemove", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseout", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseover", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mouseup", listener: (this: this, ev: MouseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "mousewheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "offline", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "online", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "orientationchange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "pagehide", listener: (this: this, ev: PageTransitionEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pageshow", listener: (this: this, ev: PageTransitionEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pause", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "play", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "playing", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointercancel", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerdown", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerenter", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerleave", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointermove", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerout", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerover", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerup", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "popstate", listener: (this: this, ev: PopStateEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "progress", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "ratechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "readystatechange", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "reset", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "resize", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "scroll", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeked", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "seeking", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "select", listener: (this: this, ev: UIEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "stalled", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "storage", listener: (this: this, ev: StorageEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "submit", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "suspend", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "timeupdate", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "unload", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "volumechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "waiting", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "wheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var Window: {
-    prototype: Window;
-    new(): Window;
-}
-
-interface Worker extends EventTarget, AbstractWorker {
-    onmessage: (this: this, ev: MessageEvent) => any;
-    postMessage(message: any, ports?: any): void;
-    terminate(): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "message", listener: (this: this, ev: MessageEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var Worker: {
-    prototype: Worker;
-    new(stringUrl: string): Worker;
-}
-
-interface XMLDocument extends Document {
-}
-
-declare var XMLDocument: {
-    prototype: XMLDocument;
-    new(): XMLDocument;
-}
-
-interface XMLHttpRequest extends EventTarget, XMLHttpRequestEventTarget {
-    onreadystatechange: (this: this, ev: Event) => any;
-    readonly readyState: number;
-    readonly response: any;
-    readonly responseText: string;
-    responseType: string;
-    readonly responseXML: any;
-    readonly status: number;
-    readonly statusText: string;
-    timeout: number;
-    readonly upload: XMLHttpRequestUpload;
-    withCredentials: boolean;
-    msCaching?: string;
-    abort(): void;
-    getAllResponseHeaders(): string;
-    getResponseHeader(header: string): string | null;
-    msCachingEnabled(): boolean;
-    open(method: string, url: string, async?: boolean, user?: string, password?: string): void;
-    overrideMimeType(mime: string): void;
-    send(data?: Document): void;
-    send(data?: string): void;
-    send(data?: any): void;
-    setRequestHeader(header: string, value: string): void;
-    readonly DONE: number;
-    readonly HEADERS_RECEIVED: number;
-    readonly LOADING: number;
-    readonly OPENED: number;
-    readonly UNSENT: number;
-    addEventListener(type: "abort", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadend", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadstart", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "progress", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "readystatechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "timeout", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var XMLHttpRequest: {
-    prototype: XMLHttpRequest;
-    new(): XMLHttpRequest;
-    readonly DONE: number;
-    readonly HEADERS_RECEIVED: number;
-    readonly LOADING: number;
-    readonly OPENED: number;
-    readonly UNSENT: number;
-    create(): XMLHttpRequest;
-}
-
-interface XMLHttpRequestUpload extends EventTarget, XMLHttpRequestEventTarget {
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var XMLHttpRequestUpload: {
-    prototype: XMLHttpRequestUpload;
-    new(): XMLHttpRequestUpload;
-}
-
-interface XMLSerializer {
-    serializeToString(target: Node): string;
-}
-
-declare var XMLSerializer: {
-    prototype: XMLSerializer;
-    new(): XMLSerializer;
-}
-
-interface XPathEvaluator {
-    createExpression(expression: string, resolver: XPathNSResolver): XPathExpression;
-    createNSResolver(nodeResolver?: Node): XPathNSResolver;
-    evaluate(expression: string, contextNode: Node, resolver: XPathNSResolver, type: number, result: XPathResult): XPathResult;
-}
-
-declare var XPathEvaluator: {
-    prototype: XPathEvaluator;
-    new(): XPathEvaluator;
-}
-
-interface XPathExpression {
-    evaluate(contextNode: Node, type: number, result: XPathResult): XPathExpression;
-}
-
-declare var XPathExpression: {
-    prototype: XPathExpression;
-    new(): XPathExpression;
-}
-
-interface XPathNSResolver {
-    lookupNamespaceURI(prefix: string): string;
-}
-
-declare var XPathNSResolver: {
-    prototype: XPathNSResolver;
-    new(): XPathNSResolver;
-}
-
-interface XPathResult {
-    readonly booleanValue: boolean;
-    readonly invalidIteratorState: boolean;
-    readonly numberValue: number;
-    readonly resultType: number;
-    readonly singleNodeValue: Node;
-    readonly snapshotLength: number;
-    readonly stringValue: string;
-    iterateNext(): Node;
-    snapshotItem(index: number): Node;
-    readonly ANY_TYPE: number;
-    readonly ANY_UNORDERED_NODE_TYPE: number;
-    readonly BOOLEAN_TYPE: number;
-    readonly FIRST_ORDERED_NODE_TYPE: number;
-    readonly NUMBER_TYPE: number;
-    readonly ORDERED_NODE_ITERATOR_TYPE: number;
-    readonly ORDERED_NODE_SNAPSHOT_TYPE: number;
-    readonly STRING_TYPE: number;
-    readonly UNORDERED_NODE_ITERATOR_TYPE: number;
-    readonly UNORDERED_NODE_SNAPSHOT_TYPE: number;
-}
-
-declare var XPathResult: {
-    prototype: XPathResult;
-    new(): XPathResult;
-    readonly ANY_TYPE: number;
-    readonly ANY_UNORDERED_NODE_TYPE: number;
-    readonly BOOLEAN_TYPE: number;
-    readonly FIRST_ORDERED_NODE_TYPE: number;
-    readonly NUMBER_TYPE: number;
-    readonly ORDERED_NODE_ITERATOR_TYPE: number;
-    readonly ORDERED_NODE_SNAPSHOT_TYPE: number;
-    readonly STRING_TYPE: number;
-    readonly UNORDERED_NODE_ITERATOR_TYPE: number;
-    readonly UNORDERED_NODE_SNAPSHOT_TYPE: number;
-}
-
-interface XSLTProcessor {
-    clearParameters(): void;
-    getParameter(namespaceURI: string, localName: string): any;
-    importStylesheet(style: Node): void;
-    removeParameter(namespaceURI: string, localName: string): void;
-    reset(): void;
-    setParameter(namespaceURI: string, localName: string, value: any): void;
-    transformToDocument(source: Node): Document;
-    transformToFragment(source: Node, document: Document): DocumentFragment;
-}
-
-declare var XSLTProcessor: {
-    prototype: XSLTProcessor;
-    new(): XSLTProcessor;
-}
-
-interface AbstractWorker {
-    onerror: (this: this, ev: ErrorEvent) => any;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-interface CanvasPathMethods {
-    arc(x: number, y: number, radius: number, startAngle: number, endAngle: number, anticlockwise?: boolean): void;
-    arcTo(x1: number, y1: number, x2: number, y2: number, radius: number): void;
-    bezierCurveTo(cp1x: number, cp1y: number, cp2x: number, cp2y: number, x: number, y: number): void;
-    closePath(): void;
-    ellipse(x: number, y: number, radiusX: number, radiusY: number, rotation: number, startAngle: number, endAngle: number, anticlockwise?: boolean): void;
-    lineTo(x: number, y: number): void;
-    moveTo(x: number, y: number): void;
-    quadraticCurveTo(cpx: number, cpy: number, x: number, y: number): void;
-    rect(x: number, y: number, w: number, h: number): void;
-}
-
-interface ChildNode {
-    remove(): void;
-}
-
-interface DOML2DeprecatedColorProperty {
-    color: string;
-}
-
-interface DOML2DeprecatedSizeProperty {
-    size: number;
-}
-
-interface DocumentEvent {
-    createEvent(eventInterface:"AnimationEvent"): AnimationEvent;
-    createEvent(eventInterface:"AriaRequestEvent"): AriaRequestEvent;
-    createEvent(eventInterface:"AudioProcessingEvent"): AudioProcessingEvent;
-    createEvent(eventInterface:"BeforeUnloadEvent"): BeforeUnloadEvent;
-    createEvent(eventInterface:"ClipboardEvent"): ClipboardEvent;
-    createEvent(eventInterface:"CloseEvent"): CloseEvent;
-    createEvent(eventInterface:"CommandEvent"): CommandEvent;
-    createEvent(eventInterface:"CompositionEvent"): CompositionEvent;
-    createEvent(eventInterface:"CustomEvent"): CustomEvent;
-    createEvent(eventInterface:"DeviceLightEvent"): DeviceLightEvent;
-    createEvent(eventInterface:"DeviceMotionEvent"): DeviceMotionEvent;
-    createEvent(eventInterface:"DeviceOrientationEvent"): DeviceOrientationEvent;
-    createEvent(eventInterface:"DragEvent"): DragEvent;
-    createEvent(eventInterface:"ErrorEvent"): ErrorEvent;
-    createEvent(eventInterface:"Event"): Event;
-    createEvent(eventInterface:"Events"): Event;
-    createEvent(eventInterface:"FocusEvent"): FocusEvent;
-    createEvent(eventInterface:"GamepadEvent"): GamepadEvent;
-    createEvent(eventInterface:"HashChangeEvent"): HashChangeEvent;
-    createEvent(eventInterface:"IDBVersionChangeEvent"): IDBVersionChangeEvent;
-    createEvent(eventInterface:"KeyboardEvent"): KeyboardEvent;
-    createEvent(eventInterface:"ListeningStateChangedEvent"): ListeningStateChangedEvent;
-    createEvent(eventInterface:"LongRunningScriptDetectedEvent"): LongRunningScriptDetectedEvent;
-    createEvent(eventInterface:"MSGestureEvent"): MSGestureEvent;
-    createEvent(eventInterface:"MSManipulationEvent"): MSManipulationEvent;
-    createEvent(eventInterface:"MSMediaKeyMessageEvent"): MSMediaKeyMessageEvent;
-    createEvent(eventInterface:"MSMediaKeyNeededEvent"): MSMediaKeyNeededEvent;
-    createEvent(eventInterface:"MSPointerEvent"): MSPointerEvent;
-    createEvent(eventInterface:"MSSiteModeEvent"): MSSiteModeEvent;
-    createEvent(eventInterface:"MediaEncryptedEvent"): MediaEncryptedEvent;
-    createEvent(eventInterface:"MediaKeyMessageEvent"): MediaKeyMessageEvent;
-    createEvent(eventInterface:"MediaStreamErrorEvent"): MediaStreamErrorEvent;
-    createEvent(eventInterface:"MediaStreamTrackEvent"): MediaStreamTrackEvent;
-    createEvent(eventInterface:"MessageEvent"): MessageEvent;
-    createEvent(eventInterface:"MouseEvent"): MouseEvent;
-    createEvent(eventInterface:"MouseEvents"): MouseEvent;
-    createEvent(eventInterface:"MutationEvent"): MutationEvent;
-    createEvent(eventInterface:"MutationEvents"): MutationEvent;
-    createEvent(eventInterface:"NavigationCompletedEvent"): NavigationCompletedEvent;
-    createEvent(eventInterface:"NavigationEvent"): NavigationEvent;
-    createEvent(eventInterface:"NavigationEventWithReferrer"): NavigationEventWithReferrer;
-    createEvent(eventInterface:"OfflineAudioCompletionEvent"): OfflineAudioCompletionEvent;
-    createEvent(eventInterface:"OverflowEvent"): OverflowEvent;
-    createEvent(eventInterface:"PageTransitionEvent"): PageTransitionEvent;
-    createEvent(eventInterface:"PermissionRequestedEvent"): PermissionRequestedEvent;
-    createEvent(eventInterface:"PointerEvent"): PointerEvent;
-    createEvent(eventInterface:"PopStateEvent"): PopStateEvent;
-    createEvent(eventInterface:"ProgressEvent"): ProgressEvent;
-    createEvent(eventInterface:"RTCDTMFToneChangeEvent"): RTCDTMFToneChangeEvent;
-    createEvent(eventInterface:"RTCDtlsTransportStateChangedEvent"): RTCDtlsTransportStateChangedEvent;
-    createEvent(eventInterface:"RTCIceCandidatePairChangedEvent"): RTCIceCandidatePairChangedEvent;
-    createEvent(eventInterface:"RTCIceGathererEvent"): RTCIceGathererEvent;
-    createEvent(eventInterface:"RTCIceTransportStateChangedEvent"): RTCIceTransportStateChangedEvent;
-    createEvent(eventInterface:"RTCSsrcConflictEvent"): RTCSsrcConflictEvent;
-    createEvent(eventInterface:"SVGZoomEvent"): SVGZoomEvent;
-    createEvent(eventInterface:"SVGZoomEvents"): SVGZoomEvent;
-    createEvent(eventInterface:"ScriptNotifyEvent"): ScriptNotifyEvent;
-    createEvent(eventInterface:"StorageEvent"): StorageEvent;
-    createEvent(eventInterface:"TextEvent"): TextEvent;
-    createEvent(eventInterface:"TouchEvent"): TouchEvent;
-    createEvent(eventInterface:"TrackEvent"): TrackEvent;
-    createEvent(eventInterface:"TransitionEvent"): TransitionEvent;
-    createEvent(eventInterface:"UIEvent"): UIEvent;
-    createEvent(eventInterface:"UIEvents"): UIEvent;
-    createEvent(eventInterface:"UnviewableContentIdentifiedEvent"): UnviewableContentIdentifiedEvent;
-    createEvent(eventInterface:"WebGLContextEvent"): WebGLContextEvent;
-    createEvent(eventInterface:"WheelEvent"): WheelEvent;
-    createEvent(eventInterface: string): Event;
-}
-
-interface ElementTraversal {
-    readonly childElementCount: number;
-    readonly firstElementChild: Element;
-    readonly lastElementChild: Element;
-    readonly nextElementSibling: Element;
-    readonly previousElementSibling: Element;
-}
-
-interface GetSVGDocument {
-    getSVGDocument(): Document;
-}
-
-interface GlobalEventHandlers {
-    onpointercancel: (this: this, ev: PointerEvent) => any;
-    onpointerdown: (this: this, ev: PointerEvent) => any;
-    onpointerenter: (this: this, ev: PointerEvent) => any;
-    onpointerleave: (this: this, ev: PointerEvent) => any;
-    onpointermove: (this: this, ev: PointerEvent) => any;
-    onpointerout: (this: this, ev: PointerEvent) => any;
-    onpointerover: (this: this, ev: PointerEvent) => any;
-    onpointerup: (this: this, ev: PointerEvent) => any;
-    onwheel: (this: this, ev: WheelEvent) => any;
-    addEventListener(type: "pointercancel", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerdown", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerenter", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerleave", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointermove", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerout", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerover", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "pointerup", listener: (this: this, ev: PointerEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "wheel", listener: (this: this, ev: WheelEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-interface HTMLTableAlignment {
-    /**
-      * Sets or retrieves a value that you can use to implement your own ch functionality for the object.
-      */
-    ch: string;
-    /**
-      * Sets or retrieves a value that you can use to implement your own chOff functionality for the object.
-      */
-    chOff: string;
-    /**
-      * Sets or retrieves how text and other content are vertically aligned within the object that contains them.
-      */
-    vAlign: string;
-}
-
-interface IDBEnvironment {
-    readonly indexedDB: IDBFactory;
-}
-
-interface LinkStyle {
-    readonly sheet: StyleSheet;
-}
-
-interface MSBaseReader {
-    onabort: (this: this, ev: Event) => any;
-    onerror: (this: this, ev: ErrorEvent) => any;
-    onload: (this: this, ev: Event) => any;
-    onloadend: (this: this, ev: ProgressEvent) => any;
-    onloadstart: (this: this, ev: Event) => any;
-    onprogress: (this: this, ev: ProgressEvent) => any;
-    readonly readyState: number;
-    readonly result: any;
-    abort(): void;
-    readonly DONE: number;
-    readonly EMPTY: number;
-    readonly LOADING: number;
-    addEventListener(type: "abort", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadend", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "progress", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-interface MSFileSaver {
-    msSaveBlob(blob: any, defaultName?: string): boolean;
-    msSaveOrOpenBlob(blob: any, defaultName?: string): boolean;
-}
-
-interface MSNavigatorDoNotTrack {
-    confirmSiteSpecificTrackingException(args: ConfirmSiteSpecificExceptionsInformation): boolean;
-    confirmWebWideTrackingException(args: ExceptionInformation): boolean;
-    removeSiteSpecificTrackingException(args: ExceptionInformation): void;
-    removeWebWideTrackingException(args: ExceptionInformation): void;
-    storeSiteSpecificTrackingException(args: StoreSiteSpecificExceptionsInformation): void;
-    storeWebWideTrackingException(args: StoreExceptionsInformation): void;
-}
-
-interface NavigatorContentUtils {
-}
-
-interface NavigatorGeolocation {
-    readonly geolocation: Geolocation;
-}
-
-interface NavigatorID {
-    readonly appName: string;
-    readonly appVersion: string;
-    readonly platform: string;
-    readonly product: string;
-    readonly productSub: string;
-    readonly userAgent: string;
-    readonly vendor: string;
-    readonly vendorSub: string;
-}
-
-interface NavigatorOnLine {
-    readonly onLine: boolean;
-}
-
-interface NavigatorStorageUtils {
-}
-
-interface NavigatorUserMedia {
-    readonly mediaDevices: MediaDevices;
-    getUserMedia(constraints: MediaStreamConstraints, successCallback: NavigatorUserMediaSuccessCallback, errorCallback: NavigatorUserMediaErrorCallback): void;
-}
-
-interface NodeSelector {
-    querySelector(selectors: "a"): HTMLAnchorElement | null;
-    querySelector(selectors: "abbr"): HTMLElement | null;
-    querySelector(selectors: "acronym"): HTMLElement | null;
-    querySelector(selectors: "address"): HTMLElement | null;
-    querySelector(selectors: "applet"): HTMLAppletElement | null;
-    querySelector(selectors: "area"): HTMLAreaElement | null;
-    querySelector(selectors: "article"): HTMLElement | null;
-    querySelector(selectors: "aside"): HTMLElement | null;
-    querySelector(selectors: "audio"): HTMLAudioElement | null;
-    querySelector(selectors: "b"): HTMLElement | null;
-    querySelector(selectors: "base"): HTMLBaseElement | null;
-    querySelector(selectors: "basefont"): HTMLBaseFontElement | null;
-    querySelector(selectors: "bdo"): HTMLElement | null;
-    querySelector(selectors: "big"): HTMLElement | null;
-    querySelector(selectors: "blockquote"): HTMLQuoteElement | null;
-    querySelector(selectors: "body"): HTMLBodyElement | null;
-    querySelector(selectors: "br"): HTMLBRElement | null;
-    querySelector(selectors: "button"): HTMLButtonElement | null;
-    querySelector(selectors: "canvas"): HTMLCanvasElement | null;
-    querySelector(selectors: "caption"): HTMLTableCaptionElement | null;
-    querySelector(selectors: "center"): HTMLElement | null;
-    querySelector(selectors: "circle"): SVGCircleElement | null;
-    querySelector(selectors: "cite"): HTMLElement | null;
-    querySelector(selectors: "clippath"): SVGClipPathElement | null;
-    querySelector(selectors: "code"): HTMLElement | null;
-    querySelector(selectors: "col"): HTMLTableColElement | null;
-    querySelector(selectors: "colgroup"): HTMLTableColElement | null;
-    querySelector(selectors: "datalist"): HTMLDataListElement | null;
-    querySelector(selectors: "dd"): HTMLElement | null;
-    querySelector(selectors: "defs"): SVGDefsElement | null;
-    querySelector(selectors: "del"): HTMLModElement | null;
-    querySelector(selectors: "desc"): SVGDescElement | null;
-    querySelector(selectors: "dfn"): HTMLElement | null;
-    querySelector(selectors: "dir"): HTMLDirectoryElement | null;
-    querySelector(selectors: "div"): HTMLDivElement | null;
-    querySelector(selectors: "dl"): HTMLDListElement | null;
-    querySelector(selectors: "dt"): HTMLElement | null;
-    querySelector(selectors: "ellipse"): SVGEllipseElement | null;
-    querySelector(selectors: "em"): HTMLElement | null;
-    querySelector(selectors: "embed"): HTMLEmbedElement | null;
-    querySelector(selectors: "feblend"): SVGFEBlendElement | null;
-    querySelector(selectors: "fecolormatrix"): SVGFEColorMatrixElement | null;
-    querySelector(selectors: "fecomponenttransfer"): SVGFEComponentTransferElement | null;
-    querySelector(selectors: "fecomposite"): SVGFECompositeElement | null;
-    querySelector(selectors: "feconvolvematrix"): SVGFEConvolveMatrixElement | null;
-    querySelector(selectors: "fediffuselighting"): SVGFEDiffuseLightingElement | null;
-    querySelector(selectors: "fedisplacementmap"): SVGFEDisplacementMapElement | null;
-    querySelector(selectors: "fedistantlight"): SVGFEDistantLightElement | null;
-    querySelector(selectors: "feflood"): SVGFEFloodElement | null;
-    querySelector(selectors: "fefunca"): SVGFEFuncAElement | null;
-    querySelector(selectors: "fefuncb"): SVGFEFuncBElement | null;
-    querySelector(selectors: "fefuncg"): SVGFEFuncGElement | null;
-    querySelector(selectors: "fefuncr"): SVGFEFuncRElement | null;
-    querySelector(selectors: "fegaussianblur"): SVGFEGaussianBlurElement | null;
-    querySelector(selectors: "feimage"): SVGFEImageElement | null;
-    querySelector(selectors: "femerge"): SVGFEMergeElement | null;
-    querySelector(selectors: "femergenode"): SVGFEMergeNodeElement | null;
-    querySelector(selectors: "femorphology"): SVGFEMorphologyElement | null;
-    querySelector(selectors: "feoffset"): SVGFEOffsetElement | null;
-    querySelector(selectors: "fepointlight"): SVGFEPointLightElement | null;
-    querySelector(selectors: "fespecularlighting"): SVGFESpecularLightingElement | null;
-    querySelector(selectors: "fespotlight"): SVGFESpotLightElement | null;
-    querySelector(selectors: "fetile"): SVGFETileElement | null;
-    querySelector(selectors: "feturbulence"): SVGFETurbulenceElement | null;
-    querySelector(selectors: "fieldset"): HTMLFieldSetElement | null;
-    querySelector(selectors: "figcaption"): HTMLElement | null;
-    querySelector(selectors: "figure"): HTMLElement | null;
-    querySelector(selectors: "filter"): SVGFilterElement | null;
-    querySelector(selectors: "font"): HTMLFontElement | null;
-    querySelector(selectors: "footer"): HTMLElement | null;
-    querySelector(selectors: "foreignobject"): SVGForeignObjectElement | null;
-    querySelector(selectors: "form"): HTMLFormElement | null;
-    querySelector(selectors: "frame"): HTMLFrameElement | null;
-    querySelector(selectors: "frameset"): HTMLFrameSetElement | null;
-    querySelector(selectors: "g"): SVGGElement | null;
-    querySelector(selectors: "h1"): HTMLHeadingElement | null;
-    querySelector(selectors: "h2"): HTMLHeadingElement | null;
-    querySelector(selectors: "h3"): HTMLHeadingElement | null;
-    querySelector(selectors: "h4"): HTMLHeadingElement | null;
-    querySelector(selectors: "h5"): HTMLHeadingElement | null;
-    querySelector(selectors: "h6"): HTMLHeadingElement | null;
-    querySelector(selectors: "head"): HTMLHeadElement | null;
-    querySelector(selectors: "header"): HTMLElement | null;
-    querySelector(selectors: "hgroup"): HTMLElement | null;
-    querySelector(selectors: "hr"): HTMLHRElement | null;
-    querySelector(selectors: "html"): HTMLHtmlElement | null;
-    querySelector(selectors: "i"): HTMLElement | null;
-    querySelector(selectors: "iframe"): HTMLIFrameElement | null;
-    querySelector(selectors: "image"): SVGImageElement | null;
-    querySelector(selectors: "img"): HTMLImageElement | null;
-    querySelector(selectors: "input"): HTMLInputElement | null;
-    querySelector(selectors: "ins"): HTMLModElement | null;
-    querySelector(selectors: "isindex"): HTMLUnknownElement | null;
-    querySelector(selectors: "kbd"): HTMLElement | null;
-    querySelector(selectors: "keygen"): HTMLElement | null;
-    querySelector(selectors: "label"): HTMLLabelElement | null;
-    querySelector(selectors: "legend"): HTMLLegendElement | null;
-    querySelector(selectors: "li"): HTMLLIElement | null;
-    querySelector(selectors: "line"): SVGLineElement | null;
-    querySelector(selectors: "lineargradient"): SVGLinearGradientElement | null;
-    querySelector(selectors: "link"): HTMLLinkElement | null;
-    querySelector(selectors: "listing"): HTMLPreElement | null;
-    querySelector(selectors: "map"): HTMLMapElement | null;
-    querySelector(selectors: "mark"): HTMLElement | null;
-    querySelector(selectors: "marker"): SVGMarkerElement | null;
-    querySelector(selectors: "marquee"): HTMLMarqueeElement | null;
-    querySelector(selectors: "mask"): SVGMaskElement | null;
-    querySelector(selectors: "menu"): HTMLMenuElement | null;
-    querySelector(selectors: "meta"): HTMLMetaElement | null;
-    querySelector(selectors: "metadata"): SVGMetadataElement | null;
-    querySelector(selectors: "meter"): HTMLMeterElement | null;
-    querySelector(selectors: "nav"): HTMLElement | null;
-    querySelector(selectors: "nextid"): HTMLUnknownElement | null;
-    querySelector(selectors: "nobr"): HTMLElement | null;
-    querySelector(selectors: "noframes"): HTMLElement | null;
-    querySelector(selectors: "noscript"): HTMLElement | null;
-    querySelector(selectors: "object"): HTMLObjectElement | null;
-    querySelector(selectors: "ol"): HTMLOListElement | null;
-    querySelector(selectors: "optgroup"): HTMLOptGroupElement | null;
-    querySelector(selectors: "option"): HTMLOptionElement | null;
-    querySelector(selectors: "p"): HTMLParagraphElement | null;
-    querySelector(selectors: "param"): HTMLParamElement | null;
-    querySelector(selectors: "path"): SVGPathElement | null;
-    querySelector(selectors: "pattern"): SVGPatternElement | null;
-    querySelector(selectors: "picture"): HTMLPictureElement | null;
-    querySelector(selectors: "plaintext"): HTMLElement | null;
-    querySelector(selectors: "polygon"): SVGPolygonElement | null;
-    querySelector(selectors: "polyline"): SVGPolylineElement | null;
-    querySelector(selectors: "pre"): HTMLPreElement | null;
-    querySelector(selectors: "progress"): HTMLProgressElement | null;
-    querySelector(selectors: "q"): HTMLQuoteElement | null;
-    querySelector(selectors: "radialgradient"): SVGRadialGradientElement | null;
-    querySelector(selectors: "rect"): SVGRectElement | null;
-    querySelector(selectors: "rt"): HTMLElement | null;
-    querySelector(selectors: "ruby"): HTMLElement | null;
-    querySelector(selectors: "s"): HTMLElement | null;
-    querySelector(selectors: "samp"): HTMLElement | null;
-    querySelector(selectors: "script"): HTMLScriptElement | null;
-    querySelector(selectors: "section"): HTMLElement | null;
-    querySelector(selectors: "select"): HTMLSelectElement | null;
-    querySelector(selectors: "small"): HTMLElement | null;
-    querySelector(selectors: "source"): HTMLSourceElement | null;
-    querySelector(selectors: "span"): HTMLSpanElement | null;
-    querySelector(selectors: "stop"): SVGStopElement | null;
-    querySelector(selectors: "strike"): HTMLElement | null;
-    querySelector(selectors: "strong"): HTMLElement | null;
-    querySelector(selectors: "style"): HTMLStyleElement | null;
-    querySelector(selectors: "sub"): HTMLElement | null;
-    querySelector(selectors: "sup"): HTMLElement | null;
-    querySelector(selectors: "svg"): SVGSVGElement | null;
-    querySelector(selectors: "switch"): SVGSwitchElement | null;
-    querySelector(selectors: "symbol"): SVGSymbolElement | null;
-    querySelector(selectors: "table"): HTMLTableElement | null;
-    querySelector(selectors: "tbody"): HTMLTableSectionElement | null;
-    querySelector(selectors: "td"): HTMLTableDataCellElement | null;
-    querySelector(selectors: "template"): HTMLTemplateElement | null;
-    querySelector(selectors: "text"): SVGTextElement | null;
-    querySelector(selectors: "textpath"): SVGTextPathElement | null;
-    querySelector(selectors: "textarea"): HTMLTextAreaElement | null;
-    querySelector(selectors: "tfoot"): HTMLTableSectionElement | null;
-    querySelector(selectors: "th"): HTMLTableHeaderCellElement | null;
-    querySelector(selectors: "thead"): HTMLTableSectionElement | null;
-    querySelector(selectors: "title"): HTMLTitleElement | null;
-    querySelector(selectors: "tr"): HTMLTableRowElement | null;
-    querySelector(selectors: "track"): HTMLTrackElement | null;
-    querySelector(selectors: "tspan"): SVGTSpanElement | null;
-    querySelector(selectors: "tt"): HTMLElement | null;
-    querySelector(selectors: "u"): HTMLElement | null;
-    querySelector(selectors: "ul"): HTMLUListElement | null;
-    querySelector(selectors: "use"): SVGUseElement | null;
-    querySelector(selectors: "var"): HTMLElement | null;
-    querySelector(selectors: "video"): HTMLVideoElement | null;
-    querySelector(selectors: "view"): SVGViewElement | null;
-    querySelector(selectors: "wbr"): HTMLElement | null;
-    querySelector(selectors: "x-ms-webview"): MSHTMLWebViewElement | null;
-    querySelector(selectors: "xmp"): HTMLPreElement | null;
-    querySelector(selectors: string): Element | null;
-    querySelectorAll(selectors: "a"): NodeListOf<HTMLAnchorElement>;
-    querySelectorAll(selectors: "abbr"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "acronym"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "address"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "applet"): NodeListOf<HTMLAppletElement>;
-    querySelectorAll(selectors: "area"): NodeListOf<HTMLAreaElement>;
-    querySelectorAll(selectors: "article"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "aside"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "audio"): NodeListOf<HTMLAudioElement>;
-    querySelectorAll(selectors: "b"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "base"): NodeListOf<HTMLBaseElement>;
-    querySelectorAll(selectors: "basefont"): NodeListOf<HTMLBaseFontElement>;
-    querySelectorAll(selectors: "bdo"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "big"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "blockquote"): NodeListOf<HTMLQuoteElement>;
-    querySelectorAll(selectors: "body"): NodeListOf<HTMLBodyElement>;
-    querySelectorAll(selectors: "br"): NodeListOf<HTMLBRElement>;
-    querySelectorAll(selectors: "button"): NodeListOf<HTMLButtonElement>;
-    querySelectorAll(selectors: "canvas"): NodeListOf<HTMLCanvasElement>;
-    querySelectorAll(selectors: "caption"): NodeListOf<HTMLTableCaptionElement>;
-    querySelectorAll(selectors: "center"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "circle"): NodeListOf<SVGCircleElement>;
-    querySelectorAll(selectors: "cite"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "clippath"): NodeListOf<SVGClipPathElement>;
-    querySelectorAll(selectors: "code"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "col"): NodeListOf<HTMLTableColElement>;
-    querySelectorAll(selectors: "colgroup"): NodeListOf<HTMLTableColElement>;
-    querySelectorAll(selectors: "datalist"): NodeListOf<HTMLDataListElement>;
-    querySelectorAll(selectors: "dd"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "defs"): NodeListOf<SVGDefsElement>;
-    querySelectorAll(selectors: "del"): NodeListOf<HTMLModElement>;
-    querySelectorAll(selectors: "desc"): NodeListOf<SVGDescElement>;
-    querySelectorAll(selectors: "dfn"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "dir"): NodeListOf<HTMLDirectoryElement>;
-    querySelectorAll(selectors: "div"): NodeListOf<HTMLDivElement>;
-    querySelectorAll(selectors: "dl"): NodeListOf<HTMLDListElement>;
-    querySelectorAll(selectors: "dt"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "ellipse"): NodeListOf<SVGEllipseElement>;
-    querySelectorAll(selectors: "em"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "embed"): NodeListOf<HTMLEmbedElement>;
-    querySelectorAll(selectors: "feblend"): NodeListOf<SVGFEBlendElement>;
-    querySelectorAll(selectors: "fecolormatrix"): NodeListOf<SVGFEColorMatrixElement>;
-    querySelectorAll(selectors: "fecomponenttransfer"): NodeListOf<SVGFEComponentTransferElement>;
-    querySelectorAll(selectors: "fecomposite"): NodeListOf<SVGFECompositeElement>;
-    querySelectorAll(selectors: "feconvolvematrix"): NodeListOf<SVGFEConvolveMatrixElement>;
-    querySelectorAll(selectors: "fediffuselighting"): NodeListOf<SVGFEDiffuseLightingElement>;
-    querySelectorAll(selectors: "fedisplacementmap"): NodeListOf<SVGFEDisplacementMapElement>;
-    querySelectorAll(selectors: "fedistantlight"): NodeListOf<SVGFEDistantLightElement>;
-    querySelectorAll(selectors: "feflood"): NodeListOf<SVGFEFloodElement>;
-    querySelectorAll(selectors: "fefunca"): NodeListOf<SVGFEFuncAElement>;
-    querySelectorAll(selectors: "fefuncb"): NodeListOf<SVGFEFuncBElement>;
-    querySelectorAll(selectors: "fefuncg"): NodeListOf<SVGFEFuncGElement>;
-    querySelectorAll(selectors: "fefuncr"): NodeListOf<SVGFEFuncRElement>;
-    querySelectorAll(selectors: "fegaussianblur"): NodeListOf<SVGFEGaussianBlurElement>;
-    querySelectorAll(selectors: "feimage"): NodeListOf<SVGFEImageElement>;
-    querySelectorAll(selectors: "femerge"): NodeListOf<SVGFEMergeElement>;
-    querySelectorAll(selectors: "femergenode"): NodeListOf<SVGFEMergeNodeElement>;
-    querySelectorAll(selectors: "femorphology"): NodeListOf<SVGFEMorphologyElement>;
-    querySelectorAll(selectors: "feoffset"): NodeListOf<SVGFEOffsetElement>;
-    querySelectorAll(selectors: "fepointlight"): NodeListOf<SVGFEPointLightElement>;
-    querySelectorAll(selectors: "fespecularlighting"): NodeListOf<SVGFESpecularLightingElement>;
-    querySelectorAll(selectors: "fespotlight"): NodeListOf<SVGFESpotLightElement>;
-    querySelectorAll(selectors: "fetile"): NodeListOf<SVGFETileElement>;
-    querySelectorAll(selectors: "feturbulence"): NodeListOf<SVGFETurbulenceElement>;
-    querySelectorAll(selectors: "fieldset"): NodeListOf<HTMLFieldSetElement>;
-    querySelectorAll(selectors: "figcaption"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "figure"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "filter"): NodeListOf<SVGFilterElement>;
-    querySelectorAll(selectors: "font"): NodeListOf<HTMLFontElement>;
-    querySelectorAll(selectors: "footer"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "foreignobject"): NodeListOf<SVGForeignObjectElement>;
-    querySelectorAll(selectors: "form"): NodeListOf<HTMLFormElement>;
-    querySelectorAll(selectors: "frame"): NodeListOf<HTMLFrameElement>;
-    querySelectorAll(selectors: "frameset"): NodeListOf<HTMLFrameSetElement>;
-    querySelectorAll(selectors: "g"): NodeListOf<SVGGElement>;
-    querySelectorAll(selectors: "h1"): NodeListOf<HTMLHeadingElement>;
-    querySelectorAll(selectors: "h2"): NodeListOf<HTMLHeadingElement>;
-    querySelectorAll(selectors: "h3"): NodeListOf<HTMLHeadingElement>;
-    querySelectorAll(selectors: "h4"): NodeListOf<HTMLHeadingElement>;
-    querySelectorAll(selectors: "h5"): NodeListOf<HTMLHeadingElement>;
-    querySelectorAll(selectors: "h6"): NodeListOf<HTMLHeadingElement>;
-    querySelectorAll(selectors: "head"): NodeListOf<HTMLHeadElement>;
-    querySelectorAll(selectors: "header"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "hgroup"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "hr"): NodeListOf<HTMLHRElement>;
-    querySelectorAll(selectors: "html"): NodeListOf<HTMLHtmlElement>;
-    querySelectorAll(selectors: "i"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "iframe"): NodeListOf<HTMLIFrameElement>;
-    querySelectorAll(selectors: "image"): NodeListOf<SVGImageElement>;
-    querySelectorAll(selectors: "img"): NodeListOf<HTMLImageElement>;
-    querySelectorAll(selectors: "input"): NodeListOf<HTMLInputElement>;
-    querySelectorAll(selectors: "ins"): NodeListOf<HTMLModElement>;
-    querySelectorAll(selectors: "isindex"): NodeListOf<HTMLUnknownElement>;
-    querySelectorAll(selectors: "kbd"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "keygen"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "label"): NodeListOf<HTMLLabelElement>;
-    querySelectorAll(selectors: "legend"): NodeListOf<HTMLLegendElement>;
-    querySelectorAll(selectors: "li"): NodeListOf<HTMLLIElement>;
-    querySelectorAll(selectors: "line"): NodeListOf<SVGLineElement>;
-    querySelectorAll(selectors: "lineargradient"): NodeListOf<SVGLinearGradientElement>;
-    querySelectorAll(selectors: "link"): NodeListOf<HTMLLinkElement>;
-    querySelectorAll(selectors: "listing"): NodeListOf<HTMLPreElement>;
-    querySelectorAll(selectors: "map"): NodeListOf<HTMLMapElement>;
-    querySelectorAll(selectors: "mark"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "marker"): NodeListOf<SVGMarkerElement>;
-    querySelectorAll(selectors: "marquee"): NodeListOf<HTMLMarqueeElement>;
-    querySelectorAll(selectors: "mask"): NodeListOf<SVGMaskElement>;
-    querySelectorAll(selectors: "menu"): NodeListOf<HTMLMenuElement>;
-    querySelectorAll(selectors: "meta"): NodeListOf<HTMLMetaElement>;
-    querySelectorAll(selectors: "metadata"): NodeListOf<SVGMetadataElement>;
-    querySelectorAll(selectors: "meter"): NodeListOf<HTMLMeterElement>;
-    querySelectorAll(selectors: "nav"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "nextid"): NodeListOf<HTMLUnknownElement>;
-    querySelectorAll(selectors: "nobr"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "noframes"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "noscript"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "object"): NodeListOf<HTMLObjectElement>;
-    querySelectorAll(selectors: "ol"): NodeListOf<HTMLOListElement>;
-    querySelectorAll(selectors: "optgroup"): NodeListOf<HTMLOptGroupElement>;
-    querySelectorAll(selectors: "option"): NodeListOf<HTMLOptionElement>;
-    querySelectorAll(selectors: "p"): NodeListOf<HTMLParagraphElement>;
-    querySelectorAll(selectors: "param"): NodeListOf<HTMLParamElement>;
-    querySelectorAll(selectors: "path"): NodeListOf<SVGPathElement>;
-    querySelectorAll(selectors: "pattern"): NodeListOf<SVGPatternElement>;
-    querySelectorAll(selectors: "picture"): NodeListOf<HTMLPictureElement>;
-    querySelectorAll(selectors: "plaintext"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "polygon"): NodeListOf<SVGPolygonElement>;
-    querySelectorAll(selectors: "polyline"): NodeListOf<SVGPolylineElement>;
-    querySelectorAll(selectors: "pre"): NodeListOf<HTMLPreElement>;
-    querySelectorAll(selectors: "progress"): NodeListOf<HTMLProgressElement>;
-    querySelectorAll(selectors: "q"): NodeListOf<HTMLQuoteElement>;
-    querySelectorAll(selectors: "radialgradient"): NodeListOf<SVGRadialGradientElement>;
-    querySelectorAll(selectors: "rect"): NodeListOf<SVGRectElement>;
-    querySelectorAll(selectors: "rt"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "ruby"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "s"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "samp"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "script"): NodeListOf<HTMLScriptElement>;
-    querySelectorAll(selectors: "section"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "select"): NodeListOf<HTMLSelectElement>;
-    querySelectorAll(selectors: "small"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "source"): NodeListOf<HTMLSourceElement>;
-    querySelectorAll(selectors: "span"): NodeListOf<HTMLSpanElement>;
-    querySelectorAll(selectors: "stop"): NodeListOf<SVGStopElement>;
-    querySelectorAll(selectors: "strike"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "strong"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "style"): NodeListOf<HTMLStyleElement>;
-    querySelectorAll(selectors: "sub"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "sup"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "svg"): NodeListOf<SVGSVGElement>;
-    querySelectorAll(selectors: "switch"): NodeListOf<SVGSwitchElement>;
-    querySelectorAll(selectors: "symbol"): NodeListOf<SVGSymbolElement>;
-    querySelectorAll(selectors: "table"): NodeListOf<HTMLTableElement>;
-    querySelectorAll(selectors: "tbody"): NodeListOf<HTMLTableSectionElement>;
-    querySelectorAll(selectors: "td"): NodeListOf<HTMLTableDataCellElement>;
-    querySelectorAll(selectors: "template"): NodeListOf<HTMLTemplateElement>;
-    querySelectorAll(selectors: "text"): NodeListOf<SVGTextElement>;
-    querySelectorAll(selectors: "textpath"): NodeListOf<SVGTextPathElement>;
-    querySelectorAll(selectors: "textarea"): NodeListOf<HTMLTextAreaElement>;
-    querySelectorAll(selectors: "tfoot"): NodeListOf<HTMLTableSectionElement>;
-    querySelectorAll(selectors: "th"): NodeListOf<HTMLTableHeaderCellElement>;
-    querySelectorAll(selectors: "thead"): NodeListOf<HTMLTableSectionElement>;
-    querySelectorAll(selectors: "title"): NodeListOf<HTMLTitleElement>;
-    querySelectorAll(selectors: "tr"): NodeListOf<HTMLTableRowElement>;
-    querySelectorAll(selectors: "track"): NodeListOf<HTMLTrackElement>;
-    querySelectorAll(selectors: "tspan"): NodeListOf<SVGTSpanElement>;
-    querySelectorAll(selectors: "tt"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "u"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "ul"): NodeListOf<HTMLUListElement>;
-    querySelectorAll(selectors: "use"): NodeListOf<SVGUseElement>;
-    querySelectorAll(selectors: "var"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "video"): NodeListOf<HTMLVideoElement>;
-    querySelectorAll(selectors: "view"): NodeListOf<SVGViewElement>;
-    querySelectorAll(selectors: "wbr"): NodeListOf<HTMLElement>;
-    querySelectorAll(selectors: "x-ms-webview"): NodeListOf<MSHTMLWebViewElement>;
-    querySelectorAll(selectors: "xmp"): NodeListOf<HTMLPreElement>;
-    querySelectorAll(selectors: string): NodeListOf<Element>;
-}
-
-interface RandomSource {
-    getRandomValues(array: ArrayBufferView): ArrayBufferView;
-}
-
-interface SVGAnimatedPathData {
-    readonly pathSegList: SVGPathSegList;
-}
-
-interface SVGAnimatedPoints {
-    readonly animatedPoints: SVGPointList;
-    readonly points: SVGPointList;
-}
-
-interface SVGExternalResourcesRequired {
-    readonly externalResourcesRequired: SVGAnimatedBoolean;
-}
-
-interface SVGFilterPrimitiveStandardAttributes extends SVGStylable {
-    readonly height: SVGAnimatedLength;
-    readonly result: SVGAnimatedString;
-    readonly width: SVGAnimatedLength;
-    readonly x: SVGAnimatedLength;
-    readonly y: SVGAnimatedLength;
-}
-
-interface SVGFitToViewBox {
-    readonly preserveAspectRatio: SVGAnimatedPreserveAspectRatio;
-    readonly viewBox: SVGAnimatedRect;
-}
-
-interface SVGLangSpace {
-    xmllang: string;
-    xmlspace: string;
-}
-
-interface SVGLocatable {
-    readonly farthestViewportElement: SVGElement;
-    readonly nearestViewportElement: SVGElement;
-    getBBox(): SVGRect;
-    getCTM(): SVGMatrix;
-    getScreenCTM(): SVGMatrix;
-    getTransformToElement(element: SVGElement): SVGMatrix;
-}
-
-interface SVGStylable {
-    className: any;
-    readonly style: CSSStyleDeclaration;
-}
-
-interface SVGTests {
-    readonly requiredExtensions: SVGStringList;
-    readonly requiredFeatures: SVGStringList;
-    readonly systemLanguage: SVGStringList;
-    hasExtension(extension: string): boolean;
-}
-
-interface SVGTransformable extends SVGLocatable {
-    readonly transform: SVGAnimatedTransformList;
-}
-
-interface SVGURIReference {
-    readonly href: SVGAnimatedString;
-}
-
-interface WindowBase64 {
-    atob(encodedString: string): string;
-    btoa(rawString: string): string;
-}
-
-interface WindowConsole {
-    readonly console: Console;
-}
-
-interface WindowLocalStorage {
-    readonly localStorage: Storage;
-}
-
-interface WindowSessionStorage {
-    readonly sessionStorage: Storage;
-}
-
-interface WindowTimers extends Object, WindowTimersExtension {
-    clearInterval(handle: number): void;
-    clearTimeout(handle: number): void;
-    setInterval(handler: (...args: any[]) => void, timeout: number): number;
-    setInterval(handler: any, timeout?: any, ...args: any[]): number;
-    setTimeout(handler: (...args: any[]) => void, timeout: number): number;
-    setTimeout(handler: any, timeout?: any, ...args: any[]): number;
-}
-
-interface WindowTimersExtension {
-    clearImmediate(handle: number): void;
-    setImmediate(handler: (...args: any[]) => void): number;
-    setImmediate(handler: any, ...args: any[]): number;
-}
-
-interface XMLHttpRequestEventTarget {
-    onabort: (this: this, ev: Event) => any;
-    onerror: (this: this, ev: ErrorEvent) => any;
-    onload: (this: this, ev: Event) => any;
-    onloadend: (this: this, ev: ProgressEvent) => any;
-    onloadstart: (this: this, ev: Event) => any;
-    onprogress: (this: this, ev: ProgressEvent) => any;
-    ontimeout: (this: this, ev: ProgressEvent) => any;
-    addEventListener(type: "abort", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadend", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "progress", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "timeout", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-interface StorageEventInit extends EventInit {
-    key?: string;
-    oldValue?: string;
-    newValue?: string;
-    url: string;
-    storageArea?: Storage;
-}
-
-interface Canvas2DContextAttributes {
-    alpha?: boolean;
-    willReadFrequently?: boolean;
-    storage?: boolean;
-    [attribute: string]: boolean | string | undefined;
-}
-
-interface NodeListOf<TNode extends Node> extends NodeList {
-    length: number;
-    item(index: number): TNode;
-    [index: number]: TNode;
-}
-
-interface HTMLCollectionOf<T extends Element> extends HTMLCollection {
-    item(index: number): T;
-    namedItem(name: string): T;
-    [index: number]: T;
-}
-
-interface BlobPropertyBag {
-    type?: string;
-    endings?: string;
-}
-
-interface FilePropertyBag {
-    type?: string;
-    lastModified?: number;
-}
-
-interface EventListenerObject {
-    handleEvent(evt: Event): void;
-}
-
-interface MessageEventInit extends EventInit {
-    data?: any;
-    origin?: string;
-    lastEventId?: string;
-    channel?: string;
-    source?: any;
-    ports?: MessagePort[];
-}
-
-interface ProgressEventInit extends EventInit {
-    lengthComputable?: boolean;
-    loaded?: number;
-    total?: number;
-}
-
-interface ScrollOptions {
-    behavior?: ScrollBehavior;
-}
-
-interface ScrollToOptions extends ScrollOptions {
-    left?: number;
-    top?: number;
-}
-
-interface ScrollIntoViewOptions extends ScrollOptions {
-    block?: ScrollLogicalPosition;
-    inline?: ScrollLogicalPosition;
-}
-
-interface ClipboardEventInit extends EventInit {
-    data?: string;
-    dataType?: string;
-}
-
-interface IDBArrayKey extends Array<IDBValidKey> {
-}
-
-interface RsaKeyGenParams extends Algorithm {
-    modulusLength: number;
-    publicExponent: Uint8Array;
-}
-
-interface RsaHashedKeyGenParams extends RsaKeyGenParams {
-    hash: AlgorithmIdentifier;
-}
-
-interface RsaKeyAlgorithm extends KeyAlgorithm {
-    modulusLength: number;
-    publicExponent: Uint8Array;
-}
-
-interface RsaHashedKeyAlgorithm extends RsaKeyAlgorithm {
-    hash: AlgorithmIdentifier;
-}
-
-interface RsaHashedImportParams {
-    hash: AlgorithmIdentifier;
-}
-
-interface RsaPssParams {
-    saltLength: number;
-}
-
-interface RsaOaepParams extends Algorithm {
-    label?: BufferSource;
-}
-
-interface EcdsaParams extends Algorithm {
-    hash: AlgorithmIdentifier;
-}
-
-interface EcKeyGenParams extends Algorithm {
-    namedCurve: string;
-}
-
-interface EcKeyAlgorithm extends KeyAlgorithm {
-    typedCurve: string;
-}
-
-interface EcKeyImportParams {
-    namedCurve: string;
-}
-
-interface EcdhKeyDeriveParams extends Algorithm {
-    public: CryptoKey;
-}
-
-interface AesCtrParams extends Algorithm {
-    counter: BufferSource;
-    length: number;
-}
-
-interface AesKeyAlgorithm extends KeyAlgorithm {
-    length: number;
-}
-
-interface AesKeyGenParams extends Algorithm {
-    length: number;
-}
-
-interface AesDerivedKeyParams extends Algorithm {
-    length: number;
-}
-
-interface AesCbcParams extends Algorithm {
-    iv: BufferSource;
-}
-
-interface AesCmacParams extends Algorithm {
-    length: number;
-}
-
-interface AesGcmParams extends Algorithm {
-    iv: BufferSource;
-    additionalData?: BufferSource;
-    tagLength?: number;
-}
-
-interface AesCfbParams extends Algorithm {
-    iv: BufferSource;
-}
-
-interface HmacImportParams extends Algorithm {
-    hash?: AlgorithmIdentifier;
-    length?: number;
-}
-
-interface HmacKeyAlgorithm extends KeyAlgorithm {
-    hash: AlgorithmIdentifier;
-    length: number;
-}
-
-interface HmacKeyGenParams extends Algorithm {
-    hash: AlgorithmIdentifier;
-    length?: number;
-}
-
-interface DhKeyGenParams extends Algorithm {
-    prime: Uint8Array;
-    generator: Uint8Array;
-}
-
-interface DhKeyAlgorithm extends KeyAlgorithm {
-    prime: Uint8Array;
-    generator: Uint8Array;
-}
-
-interface DhKeyDeriveParams extends Algorithm {
-    public: CryptoKey;
-}
-
-interface DhImportKeyParams extends Algorithm {
-    prime: Uint8Array;
-    generator: Uint8Array;
-}
-
-interface ConcatParams extends Algorithm {
-    hash?: AlgorithmIdentifier;
-    algorithmId: Uint8Array;
-    partyUInfo: Uint8Array;
-    partyVInfo: Uint8Array;
-    publicInfo?: Uint8Array;
-    privateInfo?: Uint8Array;
-}
-
-interface HkdfCtrParams extends Algorithm {
-    hash: AlgorithmIdentifier;
-    label: BufferSource;
-    context: BufferSource;
-}
-
-interface Pbkdf2Params extends Algorithm {
-    salt: BufferSource;
-    iterations: number;
-    hash: AlgorithmIdentifier;
-}
-
-interface RsaOtherPrimesInfo {
-    r: string;
-    d: string;
-    t: string;
-}
-
-interface JsonWebKey {
-    kty: string;
-    use?: string;
-    key_ops?: string[];
-    alg?: string;
-    kid?: string;
-    x5u?: string;
-    x5c?: string;
-    x5t?: string;
-    ext?: boolean;
-    crv?: string;
-    x?: string;
-    y?: string;
-    d?: string;
-    n?: string;
-    e?: string;
-    p?: string;
-    q?: string;
-    dp?: string;
-    dq?: string;
-    qi?: string;
-    oth?: RsaOtherPrimesInfo[];
-    k?: string;
-}
-
-interface ParentNode {
-    readonly children: HTMLCollection;
-    readonly firstElementChild: Element;
-    readonly lastElementChild: Element;
-    readonly childElementCount: number;
-}
-
-declare type EventListenerOrEventListenerObject = EventListener | EventListenerObject;
-
-interface ErrorEventHandler {
-    (message: string, filename?: string, lineno?: number, colno?: number, error?:Error): void;
-}
-interface PositionCallback {
-    (position: Position): void;
-}
-interface PositionErrorCallback {
-    (error: PositionError): void;
-}
-interface MediaQueryListListener {
-    (mql: MediaQueryList): void;
-}
-interface MSLaunchUriCallback {
-    (): void;
-}
-interface FrameRequestCallback {
-    (time: number): void;
-}
-interface MSUnsafeFunctionCallback {
-    (): any;
-}
-interface MSExecAtPriorityFunctionCallback {
-    (...args: any[]): any;
-}
-interface MutationCallback {
-    (mutations: MutationRecord[], observer: MutationObserver): void;
-}
-interface DecodeSuccessCallback {
-    (decodedData: AudioBuffer): void;
-}
-interface DecodeErrorCallback {
-    (error: DOMException): void;
-}
-interface FunctionStringCallback {
-    (data: string): void;
-}
-interface NavigatorUserMediaSuccessCallback {
-    (stream: MediaStream): void;
-}
-interface NavigatorUserMediaErrorCallback {
-    (error: MediaStreamError): void;
-}
-interface ForEachCallback {
-    (keyId: any, status: string): void;
-}
-declare var Audio: {new(src?: string): HTMLAudioElement; };
-declare var Image: {new(width?: number, height?: number): HTMLImageElement; };
-declare var Option: {new(text?: string, value?: string, defaultSelected?: boolean, selected?: boolean): HTMLOptionElement; };
-declare var applicationCache: ApplicationCache;
-declare var clientInformation: Navigator;
-declare var closed: boolean;
-declare var crypto: Crypto;
-declare var defaultStatus: string;
-declare var devicePixelRatio: number;
-declare var doNotTrack: string;
-declare var document: Document;
-declare var event: Event;
-declare var external: External;
-declare var frameElement: Element;
-declare var frames: Window;
-declare var history: History;
-declare var innerHeight: number;
-declare var innerWidth: number;
-declare var length: number;
-declare var location: Location;
-declare var locationbar: BarProp;
-declare var menubar: BarProp;
-declare var msCredentials: MSCredentials;
-declare const name: never;
-declare var navigator: Navigator;
-declare var offscreenBuffering: string | boolean;
-declare var onabort: (this: Window, ev: UIEvent) => any;
-declare var onafterprint: (this: Window, ev: Event) => any;
-declare var onbeforeprint: (this: Window, ev: Event) => any;
-declare var onbeforeunload: (this: Window, ev: BeforeUnloadEvent) => any;
-declare var onblur: (this: Window, ev: FocusEvent) => any;
-declare var oncanplay: (this: Window, ev: Event) => any;
-declare var oncanplaythrough: (this: Window, ev: Event) => any;
-declare var onchange: (this: Window, ev: Event) => any;
-declare var onclick: (this: Window, ev: MouseEvent) => any;
-declare var oncompassneedscalibration: (this: Window, ev: Event) => any;
-declare var oncontextmenu: (this: Window, ev: PointerEvent) => any;
-declare var ondblclick: (this: Window, ev: MouseEvent) => any;
-declare var ondevicelight: (this: Window, ev: DeviceLightEvent) => any;
-declare var ondevicemotion: (this: Window, ev: DeviceMotionEvent) => any;
-declare var ondeviceorientation: (this: Window, ev: DeviceOrientationEvent) => any;
-declare var ondrag: (this: Window, ev: DragEvent) => any;
-declare var ondragend: (this: Window, ev: DragEvent) => any;
-declare var ondragenter: (this: Window, ev: DragEvent) => any;
-declare var ondragleave: (this: Window, ev: DragEvent) => any;
-declare var ondragover: (this: Window, ev: DragEvent) => any;
-declare var ondragstart: (this: Window, ev: DragEvent) => any;
-declare var ondrop: (this: Window, ev: DragEvent) => any;
-declare var ondurationchange: (this: Window, ev: Event) => any;
-declare var onemptied: (this: Window, ev: Event) => any;
-declare var onended: (this: Window, ev: MediaStreamErrorEvent) => any;
-declare var onerror: ErrorEventHandler;
-declare var onfocus: (this: Window, ev: FocusEvent) => any;
-declare var onhashchange: (this: Window, ev: HashChangeEvent) => any;
-declare var oninput: (this: Window, ev: Event) => any;
-declare var oninvalid: (this: Window, ev: Event) => any;
-declare var onkeydown: (this: Window, ev: KeyboardEvent) => any;
-declare var onkeypress: (this: Window, ev: KeyboardEvent) => any;
-declare var onkeyup: (this: Window, ev: KeyboardEvent) => any;
-declare var onload: (this: Window, ev: Event) => any;
-declare var onloadeddata: (this: Window, ev: Event) => any;
-declare var onloadedmetadata: (this: Window, ev: Event) => any;
-declare var onloadstart: (this: Window, ev: Event) => any;
-declare var onmessage: (this: Window, ev: MessageEvent) => any;
-declare var onmousedown: (this: Window, ev: MouseEvent) => any;
-declare var onmouseenter: (this: Window, ev: MouseEvent) => any;
-declare var onmouseleave: (this: Window, ev: MouseEvent) => any;
-declare var onmousemove: (this: Window, ev: MouseEvent) => any;
-declare var onmouseout: (this: Window, ev: MouseEvent) => any;
-declare var onmouseover: (this: Window, ev: MouseEvent) => any;
-declare var onmouseup: (this: Window, ev: MouseEvent) => any;
-declare var onmousewheel: (this: Window, ev: WheelEvent) => any;
-declare var onmsgesturechange: (this: Window, ev: MSGestureEvent) => any;
-declare var onmsgesturedoubletap: (this: Window, ev: MSGestureEvent) => any;
-declare var onmsgestureend: (this: Window, ev: MSGestureEvent) => any;
-declare var onmsgesturehold: (this: Window, ev: MSGestureEvent) => any;
-declare var onmsgesturestart: (this: Window, ev: MSGestureEvent) => any;
-declare var onmsgesturetap: (this: Window, ev: MSGestureEvent) => any;
-declare var onmsinertiastart: (this: Window, ev: MSGestureEvent) => any;
-declare var onmspointercancel: (this: Window, ev: MSPointerEvent) => any;
-declare var onmspointerdown: (this: Window, ev: MSPointerEvent) => any;
-declare var onmspointerenter: (this: Window, ev: MSPointerEvent) => any;
-declare var onmspointerleave: (this: Window, ev: MSPointerEvent) => any;
-declare var onmspointermove: (this: Window, ev: MSPointerEvent) => any;
-declare var onmspointerout: (this: Window, ev: MSPointerEvent) => any;
-declare var onmspointerover: (this: Window, ev: MSPointerEvent) => any;
-declare var onmspointerup: (this: Window, ev: MSPointerEvent) => any;
-declare var onoffline: (this: Window, ev: Event) => any;
-declare var ononline: (this: Window, ev: Event) => any;
-declare var onorientationchange: (this: Window, ev: Event) => any;
-declare var onpagehide: (this: Window, ev: PageTransitionEvent) => any;
-declare var onpageshow: (this: Window, ev: PageTransitionEvent) => any;
-declare var onpause: (this: Window, ev: Event) => any;
-declare var onplay: (this: Window, ev: Event) => any;
-declare var onplaying: (this: Window, ev: Event) => any;
-declare var onpopstate: (this: Window, ev: PopStateEvent) => any;
-declare var onprogress: (this: Window, ev: ProgressEvent) => any;
-declare var onratechange: (this: Window, ev: Event) => any;
-declare var onreadystatechange: (this: Window, ev: ProgressEvent) => any;
-declare var onreset: (this: Window, ev: Event) => any;
-declare var onresize: (this: Window, ev: UIEvent) => any;
-declare var onscroll: (this: Window, ev: UIEvent) => any;
-declare var onseeked: (this: Window, ev: Event) => any;
-declare var onseeking: (this: Window, ev: Event) => any;
-declare var onselect: (this: Window, ev: UIEvent) => any;
-declare var onstalled: (this: Window, ev: Event) => any;
-declare var onstorage: (this: Window, ev: StorageEvent) => any;
-declare var onsubmit: (this: Window, ev: Event) => any;
-declare var onsuspend: (this: Window, ev: Event) => any;
-declare var ontimeupdate: (this: Window, ev: Event) => any;
-declare var ontouchcancel: (ev: TouchEvent) => any;
-declare var ontouchend: (ev: TouchEvent) => any;
-declare var ontouchmove: (ev: TouchEvent) => any;
-declare var ontouchstart: (ev: TouchEvent) => any;
-declare var onunload: (this: Window, ev: Event) => any;
-declare var onvolumechange: (this: Window, ev: Event) => any;
-declare var onwaiting: (this: Window, ev: Event) => any;
-declare var opener: any;
-declare var orientation: string | number;
-declare var outerHeight: number;
-declare var outerWidth: number;
-declare var pageXOffset: number;
-declare var pageYOffset: number;
-declare var parent: Window;
-declare var performance: Performance;
-declare var personalbar: BarProp;
-declare var screen: Screen;
-declare var screenLeft: number;
-declare var screenTop: number;
-declare var screenX: number;
-declare var screenY: number;
-declare var scrollX: number;
-declare var scrollY: number;
-declare var scrollbars: BarProp;
-declare var self: Window;
-declare var status: string;
-declare var statusbar: BarProp;
-declare var styleMedia: StyleMedia;
-declare var toolbar: BarProp;
-declare var top: Window;
-declare var window: Window;
-declare function alert(message?: any): void;
-declare function blur(): void;
-declare function cancelAnimationFrame(handle: number): void;
-declare function captureEvents(): void;
-declare function close(): void;
-declare function confirm(message?: string): boolean;
-declare function focus(): void;
-declare function getComputedStyle(elt: Element, pseudoElt?: string): CSSStyleDeclaration;
-declare function getMatchedCSSRules(elt: Element, pseudoElt?: string): CSSRuleList;
-declare function getSelection(): Selection;
-declare function matchMedia(mediaQuery: string): MediaQueryList;
-declare function moveBy(x?: number, y?: number): void;
-declare function moveTo(x?: number, y?: number): void;
-declare function msWriteProfilerMark(profilerMarkName: string): void;
-declare function open(url?: string, target?: string, features?: string, replace?: boolean): Window;
-declare function postMessage(message: any, targetOrigin: string, transfer?: any[]): void;
-declare function print(): void;
-declare function prompt(message?: string, _default?: string): string | null;
-declare function releaseEvents(): void;
-declare function requestAnimationFrame(callback: FrameRequestCallback): number;
-declare function resizeBy(x?: number, y?: number): void;
-declare function resizeTo(x?: number, y?: number): void;
-declare function scroll(x?: number, y?: number): void;
-declare function scrollBy(x?: number, y?: number): void;
-declare function scrollTo(x?: number, y?: number): void;
-declare function webkitCancelAnimationFrame(handle: number): void;
-declare function webkitConvertPointFromNodeToPage(node: Node, pt: WebKitPoint): WebKitPoint;
-declare function webkitConvertPointFromPageToNode(node: Node, pt: WebKitPoint): WebKitPoint;
-declare function webkitRequestAnimationFrame(callback: FrameRequestCallback): number;
-declare function scroll(options?: ScrollToOptions): void;
-declare function scrollTo(options?: ScrollToOptions): void;
-declare function scrollBy(options?: ScrollToOptions): void;
-declare function toString(): string;
-declare function addEventListener(type: string, listener?: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-declare function dispatchEvent(evt: Event): boolean;
-declare function removeEventListener(type: string, listener?: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-declare function clearInterval(handle: number): void;
-declare function clearTimeout(handle: number): void;
-declare function setInterval(handler: (...args: any[]) => void, timeout: number): number;
-declare function setInterval(handler: any, timeout?: any, ...args: any[]): number;
-declare function setTimeout(handler: (...args: any[]) => void, timeout: number): number;
-declare function setTimeout(handler: any, timeout?: any, ...args: any[]): number;
-declare function clearImmediate(handle: number): void;
-declare function setImmediate(handler: (...args: any[]) => void): number;
-declare function setImmediate(handler: any, ...args: any[]): number;
-declare var sessionStorage: Storage;
-declare var localStorage: Storage;
-declare var console: Console;
-declare var onpointercancel: (this: Window, ev: PointerEvent) => any;
-declare var onpointerdown: (this: Window, ev: PointerEvent) => any;
-declare var onpointerenter: (this: Window, ev: PointerEvent) => any;
-declare var onpointerleave: (this: Window, ev: PointerEvent) => any;
-declare var onpointermove: (this: Window, ev: PointerEvent) => any;
-declare var onpointerout: (this: Window, ev: PointerEvent) => any;
-declare var onpointerover: (this: Window, ev: PointerEvent) => any;
-declare var onpointerup: (this: Window, ev: PointerEvent) => any;
-declare var onwheel: (this: Window, ev: WheelEvent) => any;
-declare var indexedDB: IDBFactory;
-declare function atob(encodedString: string): string;
-declare function btoa(rawString: string): string;
-declare function addEventListener(type: "MSGestureChange", listener: (this: Window, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "MSGestureDoubleTap", listener: (this: Window, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "MSGestureEnd", listener: (this: Window, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "MSGestureHold", listener: (this: Window, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "MSGestureStart", listener: (this: Window, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "MSGestureTap", listener: (this: Window, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "MSInertiaStart", listener: (this: Window, ev: MSGestureEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "MSPointerCancel", listener: (this: Window, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "MSPointerDown", listener: (this: Window, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "MSPointerEnter", listener: (this: Window, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "MSPointerLeave", listener: (this: Window, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "MSPointerMove", listener: (this: Window, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "MSPointerOut", listener: (this: Window, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "MSPointerOver", listener: (this: Window, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "MSPointerUp", listener: (this: Window, ev: MSPointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "abort", listener: (this: Window, ev: UIEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "afterprint", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "beforeprint", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "beforeunload", listener: (this: Window, ev: BeforeUnloadEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "blur", listener: (this: Window, ev: FocusEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "canplay", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "canplaythrough", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "change", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "click", listener: (this: Window, ev: MouseEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "compassneedscalibration", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "contextmenu", listener: (this: Window, ev: PointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "dblclick", listener: (this: Window, ev: MouseEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "devicelight", listener: (this: Window, ev: DeviceLightEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "devicemotion", listener: (this: Window, ev: DeviceMotionEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "deviceorientation", listener: (this: Window, ev: DeviceOrientationEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "drag", listener: (this: Window, ev: DragEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "dragend", listener: (this: Window, ev: DragEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "dragenter", listener: (this: Window, ev: DragEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "dragleave", listener: (this: Window, ev: DragEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "dragover", listener: (this: Window, ev: DragEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "dragstart", listener: (this: Window, ev: DragEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "drop", listener: (this: Window, ev: DragEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "durationchange", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "emptied", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "ended", listener: (this: Window, ev: MediaStreamErrorEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "focus", listener: (this: Window, ev: FocusEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "hashchange", listener: (this: Window, ev: HashChangeEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "input", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "invalid", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "keydown", listener: (this: Window, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "keypress", listener: (this: Window, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "keyup", listener: (this: Window, ev: KeyboardEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "load", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "loadeddata", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "loadedmetadata", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "loadstart", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "message", listener: (this: Window, ev: MessageEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "mousedown", listener: (this: Window, ev: MouseEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "mouseenter", listener: (this: Window, ev: MouseEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "mouseleave", listener: (this: Window, ev: MouseEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "mousemove", listener: (this: Window, ev: MouseEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "mouseout", listener: (this: Window, ev: MouseEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "mouseover", listener: (this: Window, ev: MouseEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "mouseup", listener: (this: Window, ev: MouseEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "mousewheel", listener: (this: Window, ev: WheelEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "offline", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "online", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "orientationchange", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "pagehide", listener: (this: Window, ev: PageTransitionEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "pageshow", listener: (this: Window, ev: PageTransitionEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "pause", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "play", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "playing", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "pointercancel", listener: (this: Window, ev: PointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "pointerdown", listener: (this: Window, ev: PointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "pointerenter", listener: (this: Window, ev: PointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "pointerleave", listener: (this: Window, ev: PointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "pointermove", listener: (this: Window, ev: PointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "pointerout", listener: (this: Window, ev: PointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "pointerover", listener: (this: Window, ev: PointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "pointerup", listener: (this: Window, ev: PointerEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "popstate", listener: (this: Window, ev: PopStateEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "progress", listener: (this: Window, ev: ProgressEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "ratechange", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "readystatechange", listener: (this: Window, ev: ProgressEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "reset", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "resize", listener: (this: Window, ev: UIEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "scroll", listener: (this: Window, ev: UIEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "seeked", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "seeking", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "select", listener: (this: Window, ev: UIEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "stalled", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "storage", listener: (this: Window, ev: StorageEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "submit", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "suspend", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "timeupdate", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "unload", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "volumechange", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "waiting", listener: (this: Window, ev: Event) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "wheel", listener: (this: Window, ev: WheelEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-type AAGUID = string;
-type AlgorithmIdentifier = string | Algorithm;
-type ConstrainBoolean = boolean | ConstrainBooleanParameters;
-type ConstrainDOMString = string | string[] | ConstrainDOMStringParameters;
-type ConstrainDouble = number | ConstrainDoubleRange;
-type ConstrainLong = number | ConstrainLongRange;
-type CryptoOperationData = ArrayBufferView;
-type GLbitfield = number;
-type GLboolean = boolean;
-type GLbyte = number;
-type GLclampf = number;
-type GLenum = number;
-type GLfloat = number;
-type GLint = number;
-type GLintptr = number;
-type GLshort = number;
-type GLsizei = number;
-type GLsizeiptr = number;
-type GLubyte = number;
-type GLuint = number;
-type GLushort = number;
-type IDBKeyPath = string;
-type KeyFormat = string;
-type KeyType = string;
-type KeyUsage = string;
-type MSInboundPayload = MSVideoRecvPayload | MSAudioRecvPayload;
-type MSLocalClientEvent = MSLocalClientEventBase | MSAudioLocalClientEvent;
-type MSOutboundPayload = MSVideoSendPayload | MSAudioSendPayload;
-type RTCIceGatherCandidate = RTCIceCandidate | RTCIceCandidateComplete;
-type RTCTransport = RTCDtlsTransport | RTCSrtpSdesTransport;
-type payloadtype = number;
-type ScrollBehavior = "auto" | "instant" | "smooth";
-type ScrollLogicalPosition = "start" | "center" | "end" | "nearest";
-type IDBValidKey = number | string | Date | IDBArrayKey;
-type BufferSource = ArrayBuffer | ArrayBufferView;
-type MouseWheelEvent = WheelEvent;
-type ScrollRestoration = "auto" | "manual";
-/////////////////////////////
-/// WorkerGlobalScope APIs 
-/////////////////////////////
-// These are only available in a Web Worker 
-declare function importScripts(...urls: string[]): void;
-
-
-/////////////////////////////
-/// Windows Script Host APIS
-/////////////////////////////
-
-
-interface ActiveXObject {
-    new (s: string): any;
-}
-declare var ActiveXObject: ActiveXObject;
-
-interface ITextWriter {
-    Write(s: string): void;
-    WriteLine(s: string): void;
-    Close(): void;
-}
-
-interface TextStreamBase {
-    /**
-     * The column number of the current character position in an input stream.
-     */
-    Column: number;
-
-    /**
-     * The current line number in an input stream.
-     */
-    Line: number;
-
-    /**
-     * Closes a text stream.
-     * It is not necessary to close standard streams; they close automatically when the process ends. If 
-     * you close a standard stream, be aware that any other pointers to that standard stream become invalid.
-     */
-    Close(): void;
-}
-
-interface TextStreamWriter extends TextStreamBase {
-    /**
-     * Sends a string to an output stream.
-     */
-    Write(s: string): void;
-
-    /**
-     * Sends a specified number of blank lines (newline characters) to an output stream.
-     */
-    WriteBlankLines(intLines: number): void;
-
-    /**
-     * Sends a string followed by a newline character to an output stream.
-     */
-    WriteLine(s: string): void;
-}
-
-interface TextStreamReader extends TextStreamBase {
-    /**
-     * Returns a specified number of characters from an input stream, starting at the current pointer position.
-     * Does not return until the ENTER key is pressed.
-     * Can only be used on a stream in reading mode; causes an error in writing or appending mode.
-     */
-    Read(characters: number): string;
-
-    /**
-     * Returns all characters from an input stream.
-     * Can only be used on a stream in reading mode; causes an error in writing or appending mode.
-     */
-    ReadAll(): string;
-
-    /**
-     * Returns an entire line from an input stream.
-     * Although this method extracts the newline character, it does not add it to the returned string.
-     * Can only be used on a stream in reading mode; causes an error in writing or appending mode.
-     */
-    ReadLine(): string;
-
-    /**
-     * Skips a specified number of characters when reading from an input text stream.
-     * Can only be used on a stream in reading mode; causes an error in writing or appending mode.
-     * @param characters Positive number of characters to skip forward. (Backward skipping is not supported.)
-     */
-    Skip(characters: number): void;
-
-    /**
-     * Skips the next line when reading from an input text stream.
-     * Can only be used on a stream in reading mode, not writing or appending mode.
-     */
-    SkipLine(): void;
-
-    /**
-     * Indicates whether the stream pointer position is at the end of a line.
-     */
-    AtEndOfLine: boolean;
-
-    /**
-     * Indicates whether the stream pointer position is at the end of a stream.
-     */
-    AtEndOfStream: boolean;
-}
-
-declare var WScript: {
-    /**
-    * Outputs text to either a message box (under WScript.exe) or the command console window followed by
-    * a newline (under CScript.exe).
-    */
-    Echo(s: any): void;
-
-    /**
-     * Exposes the write-only error output stream for the current script.
-     * Can be accessed only while using CScript.exe.
-     */
-    StdErr: TextStreamWriter;
-
-    /**
-     * Exposes the write-only output stream for the current script.
-     * Can be accessed only while using CScript.exe.
-     */
-    StdOut: TextStreamWriter;
-    Arguments: { length: number; Item(n: number): string; };
-
-    /**
-     *  The full path of the currently running script.
-     */
-    ScriptFullName: string;
-
-    /**
-     * Forces the script to stop immediately, with an optional exit code.
-     */
-    Quit(exitCode?: number): number;
-
-    /**
-     * The Windows Script Host build version number.
-     */
-    BuildVersion: number;
-
-    /**
-     * Fully qualified path of the host executable.
-     */
-    FullName: string;
-
-    /**
-     * Gets/sets the script mode - interactive(true) or batch(false).
-     */
-    Interactive: boolean;
-
-    /**
-     * The name of the host executable (WScript.exe or CScript.exe).
-     */
-    Name: string;
-
-    /**
-     * Path of the directory containing the host executable.
-     */
-    Path: string;
-
-    /**
-     * The filename of the currently running script.
-     */
-    ScriptName: string;
-
-    /**
-     * Exposes the read-only input stream for the current script.
-     * Can be accessed only while using CScript.exe.
-     */
-    StdIn: TextStreamReader;
-
-    /**
-     * Windows Script Host version
-     */
-    Version: string;
-
-    /**
-     * Connects a COM object's event sources to functions named with a given prefix, in the form prefix_event.
-     */
-    ConnectObject(objEventSource: any, strPrefix: string): void;
-
-    /**
-     * Creates a COM object.
-     * @param strProgiID
-     * @param strPrefix Function names in the form prefix_event will be bound to this object's COM events.
-     */
-    CreateObject(strProgID: string, strPrefix?: string): any;
-
-    /**
-     * Disconnects a COM object from its event sources.
-     */
-    DisconnectObject(obj: any): void;
-
-    /**
-     * Retrieves an existing object with the specified ProgID from memory, or creates a new one from a file.
-     * @param strPathname Fully qualified path to the file containing the object persisted to disk.
-     *                       For objects in memory, pass a zero-length string.
-     * @param strProgID
-     * @param strPrefix Function names in the form prefix_event will be bound to this object's COM events.
-     */
-    GetObject(strPathname: string, strProgID?: string, strPrefix?: string): any;
-
-    /**
-     * Suspends script execution for a specified length of time, then continues execution.
-     * @param intTime Interval (in milliseconds) to suspend script execution.
-     */
-    Sleep(intTime: number): void;
-};
-
-/**
- * Allows enumerating over a COM collection, which may not have indexed item access.
- */
-interface Enumerator<T> {
-    /**
-     * Returns true if the current item is the last one in the collection, or the collection is empty,
-     * or the current item is undefined.
-     */
-    atEnd(): boolean;
-
-    /**
-     * Returns the current item in the collection
-     */
-    item(): T;
-
-    /**
-     * Resets the current item in the collection to the first item. If there are no items in the collection,
-     * the current item is set to undefined.
-     */
-    moveFirst(): void;
-
-    /**
-     * Moves the current item to the next item in the collection. If the enumerator is at the end of
-     * the collection or the collection is empty, the current item is set to undefined.
-     */
-    moveNext(): void;
-}
-
-interface EnumeratorConstructor {
-    new <T>(collection: any): Enumerator<T>;
-    new (collection: any): Enumerator<any>;
-}
-
-declare var Enumerator: EnumeratorConstructor;
-
-/**
- * Enables reading from a COM safe array, which might have an alternate lower bound, or multiple dimensions.
- */
-interface VBArray<T> {
-    /**
-     * Returns the number of dimensions (1-based).
-     */
-    dimensions(): number;
-
-    /**
-     * Takes an index for each dimension in the array, and returns the item at the corresponding location.
-     */
-    getItem(dimension1Index: number, ...dimensionNIndexes: number[]): T;
-
-    /**
-     * Returns the smallest available index for a given dimension.
-     * @param dimension 1-based dimension (defaults to 1)
-     */
-    lbound(dimension?: number): number;
-
-    /**
-     * Returns the largest available index for a given dimension.
-     * @param dimension 1-based dimension (defaults to 1)
-     */
-    ubound(dimension?: number): number;
-
-    /**
-     * Returns a Javascript array with all the elements in the VBArray. If there are multiple dimensions,
-     * each successive dimension is appended to the end of the array.
-     * Example: [[1,2,3],[4,5,6]] becomes [1,2,3,4,5,6]
-     */
-    toArray(): T[];
-}
-
-interface VBArrayConstructor {
-    new <T>(safeArray: any): VBArray<T>;
-    new (safeArray: any): VBArray<any>;
-}
-
-declare var VBArray: VBArrayConstructor;
-
-/**
- * Automation date (VT_DATE)
- */
-interface VarDate { }
-
-interface DateConstructor {
-    new (vd: VarDate): Date;
-}
-
-interface Date {
-    getVarDate: () => VarDate;
-}
-/// <reference path="lib.dom.d.ts" />
-
-interface DOMTokenList {
-    [Symbol.iterator](): IterableIterator<string>;
-}
-
-interface NodeList {
-    [Symbol.iterator](): IterableIterator<Node>
-}
-
-interface NodeListOf<TNode extends Node> {
-    [Symbol.iterator](): IterableIterator<TNode>
-}
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved. 
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0  
+ 
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
+MERCHANTABLITY OR NON-INFRINGEMENT. 
+ 
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+
+
+
+/// <reference no-default-lib="true"/>
+
+
+/////////////////////////////
+/// ECMAScript APIs
+/////////////////////////////
+
+declare const NaN: number;
+declare const Infinity: number;
+
+/**
+  * Evaluates JavaScript code and executes it.
+  * @param x A String value that contains valid JavaScript code.
+  */
+declare function eval(x: string): any;
+
+/**
+  * Converts A string to an integer.
+  * @param s A string to convert into a number.
+  * @param radix A value between 2 and 36 that specifies the base of the number in numString.
+  * If this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.
+  * All other strings are considered decimal.
+  */
+declare function parseInt(s: string, radix?: number): number;
+
+/**
+  * Converts a string to a floating-point number.
+  * @param string A string that contains a floating-point number.
+  */
+declare function parseFloat(string: string): number;
+
+/**
+  * Returns a Boolean value that indicates whether a value is the reserved value NaN (not a number).
+  * @param number A numeric value.
+  */
+declare function isNaN(number: number): boolean;
+
+/**
+  * Determines whether a supplied number is finite.
+  * @param number Any numeric value.
+  */
+declare function isFinite(number: number): boolean;
+
+/**
+  * Gets the unencoded version of an encoded Uniform Resource Identifier (URI).
+  * @param encodedURI A value representing an encoded URI.
+  */
+declare function decodeURI(encodedURI: string): string;
+
+/**
+  * Gets the unencoded version of an encoded component of a Uniform Resource Identifier (URI).
+  * @param encodedURIComponent A value representing an encoded URI component.
+  */
+declare function decodeURIComponent(encodedURIComponent: string): string;
+
+/**
+  * Encodes a text string as a valid Uniform Resource Identifier (URI)
+  * @param uri A value representing an encoded URI.
+  */
+declare function encodeURI(uri: string): string;
+
+/**
+  * Encodes a text string as a valid component of a Uniform Resource Identifier (URI).
+  * @param uriComponent A value representing an encoded URI component.
+  */
+declare function encodeURIComponent(uriComponent: string): string;
+
+interface PropertyDescriptor {
+    configurable?: boolean;
+    enumerable?: boolean;
+    value?: any;
+    writable?: boolean;
+    get?(): any;
+    set?(v: any): void;
+}
+
+interface PropertyDescriptorMap {
+    [s: string]: PropertyDescriptor;
+}
+
+interface Object {
+    /** The initial value of Object.prototype.constructor is the standard built-in Object constructor. */
+    constructor: Function;
+
+    /** Returns a string representation of an object. */
+    toString(): string;
+
+    /** Returns a date converted to a string using the current locale. */
+    toLocaleString(): string;
+
+    /** Returns the primitive value of the specified object. */
+    valueOf(): Object;
+
+    /**
+      * Determines whether an object has a property with the specified name.
+      * @param v A property name.
+      */
+    hasOwnProperty(v: string): boolean;
+
+    /**
+      * Determines whether an object exists in another object's prototype chain.
+      * @param v Another object whose prototype chain is to be checked.
+      */
+    isPrototypeOf(v: Object): boolean;
+
+    /**
+      * Determines whether a specified property is enumerable.
+      * @param v A property name.
+      */
+    propertyIsEnumerable(v: string): boolean;
+}
+
+interface ObjectConstructor {
+    new(value?: any): Object;
+    (): any;
+    (value: any): any;
+
+    /** A reference to the prototype for a class of objects. */
+    readonly prototype: Object;
+
+    /**
+      * Returns the prototype of an object.
+      * @param o The object that references the prototype.
+      */
+    getPrototypeOf(o: any): any;
+
+    /**
+      * Gets the own property descriptor of the specified object.
+      * An own property descriptor is one that is defined directly on the object and is not inherited from the object's prototype.
+      * @param o Object that contains the property.
+      * @param p Name of the property.
+    */
+    getOwnPropertyDescriptor(o: any, p: string): PropertyDescriptor;
+
+    /**
+      * Returns the names of the own properties of an object. The own properties of an object are those that are defined directly
+      * on that object, and are not inherited from the object's prototype. The properties of an object include both fields (objects) and functions.
+      * @param o Object that contains the own properties.
+      */
+    getOwnPropertyNames(o: any): string[];
+
+    /**
+      * Creates an object that has the specified prototype or that has null prototype.
+      * @param o Object to use as a prototype. May be null.
+      */
+    create(o: object | null): any;
+
+    /**
+      * Creates an object that has the specified prototype, and that optionally contains specified properties.
+      * @param o Object to use as a prototype. May be null
+      * @param properties JavaScript object that contains one or more property descriptors.
+      */
+    create(o: object | null, properties: PropertyDescriptorMap & ThisType<any>): any;
+
+    /**
+      * Adds a property to an object, or modifies attributes of an existing property.
+      * @param o Object on which to add or modify the property. This can be a native JavaScript object (that is, a user-defined object or a built in object) or a DOM object.
+      * @param p The property name.
+      * @param attributes Descriptor for the property. It can be for a data property or an accessor property.
+      */
+    defineProperty(o: any, p: string, attributes: PropertyDescriptor & ThisType<any>): any;
+
+    /**
+      * Adds one or more properties to an object, and/or modifies attributes of existing properties.
+      * @param o Object on which to add or modify the properties. This can be a native JavaScript object or a DOM object.
+      * @param properties JavaScript object that contains one or more descriptor objects. Each descriptor object describes a data property or an accessor property.
+      */
+    defineProperties(o: any, properties: PropertyDescriptorMap & ThisType<any>): any;
+
+    /**
+      * Prevents the modification of attributes of existing properties, and prevents the addition of new properties.
+      * @param o Object on which to lock the attributes.
+      */
+    seal<T>(o: T): T;
+
+    /**
+      * Prevents the modification of existing property attributes and values, and prevents the addition of new properties.
+      * @param o Object on which to lock the attributes.
+      */
+    freeze<T>(a: T[]): ReadonlyArray<T>;
+
+    /**
+      * Prevents the modification of existing property attributes and values, and prevents the addition of new properties.
+      * @param o Object on which to lock the attributes.
+      */
+    freeze<T extends Function>(f: T): T;
+
+    /**
+      * Prevents the modification of existing property attributes and values, and prevents the addition of new properties.
+      * @param o Object on which to lock the attributes.
+      */
+    freeze<T>(o: T): Readonly<T>;
+
+    /**
+      * Prevents the addition of new properties to an object.
+      * @param o Object to make non-extensible.
+      */
+    preventExtensions<T>(o: T): T;
+
+    /**
+      * Returns true if existing property attributes cannot be modified in an object and new properties cannot be added to the object.
+      * @param o Object to test.
+      */
+    isSealed(o: any): boolean;
+
+    /**
+      * Returns true if existing property attributes and values cannot be modified in an object, and new properties cannot be added to the object.
+      * @param o Object to test.
+      */
+    isFrozen(o: any): boolean;
+
+    /**
+      * Returns a value that indicates whether new properties can be added to an object.
+      * @param o Object to test.
+      */
+    isExtensible(o: any): boolean;
+
+    /**
+      * Returns the names of the enumerable properties and methods of an object.
+      * @param o Object that contains the properties and methods. This can be an object that you created or an existing Document Object Model (DOM) object.
+      */
+    keys(o: any): string[];
+}
+
+/**
+  * Provides functionality common to all JavaScript objects.
+  */
+declare const Object: ObjectConstructor;
+
+/**
+  * Creates a new function.
+  */
+interface Function {
+    /**
+      * Calls the function, substituting the specified object for the this value of the function, and the specified array for the arguments of the function.
+      * @param thisArg The object to be used as the this object.
+      * @param argArray A set of arguments to be passed to the function.
+      */
+    apply(this: Function, thisArg: any, argArray?: any): any;
+
+    /**
+      * Calls a method of an object, substituting another object for the current object.
+      * @param thisArg The object to be used as the current object.
+      * @param argArray A list of arguments to be passed to the method.
+      */
+    call(this: Function, thisArg: any, ...argArray: any[]): any;
+
+    /**
+      * For a given function, creates a bound function that has the same body as the original function.
+      * The this object of the bound function is associated with the specified object, and has the specified initial parameters.
+      * @param thisArg An object to which the this keyword can refer inside the new function.
+      * @param argArray A list of arguments to be passed to the new function.
+      */
+    bind(this: Function, thisArg: any, ...argArray: any[]): any;
+
+    /** Returns a string representation of a function. */
+    toString(): string;
+
+    prototype: any;
+    readonly length: number;
+
+    // Non-standard extensions
+    arguments: any;
+    caller: Function;
+}
+
+interface FunctionConstructor {
+    /**
+      * Creates a new function.
+      * @param args A list of arguments the function accepts.
+      */
+    new(...args: string[]): Function;
+    (...args: string[]): Function;
+    readonly prototype: Function;
+}
+
+declare const Function: FunctionConstructor;
+
+interface IArguments {
+    [index: number]: any;
+    length: number;
+    callee: Function;
+}
+
+interface String {
+    /** Returns a string representation of a string. */
+    toString(): string;
+
+    /**
+      * Returns the character at the specified index.
+      * @param pos The zero-based index of the desired character.
+      */
+    charAt(pos: number): string;
+
+    /**
+      * Returns the Unicode value of the character at the specified location.
+      * @param index The zero-based index of the desired character. If there is no character at the specified index, NaN is returned.
+      */
+    charCodeAt(index: number): number;
+
+    /**
+      * Returns a string that contains the concatenation of two or more strings.
+      * @param strings The strings to append to the end of the string.
+      */
+    concat(...strings: string[]): string;
+
+    /**
+      * Returns the position of the first occurrence of a substring.
+      * @param searchString The substring to search for in the string
+      * @param position The index at which to begin searching the String object. If omitted, search starts at the beginning of the string.
+      */
+    indexOf(searchString: string, position?: number): number;
+
+    /**
+      * Returns the last occurrence of a substring in the string.
+      * @param searchString The substring to search for.
+      * @param position The index at which to begin searching. If omitted, the search begins at the end of the string.
+      */
+    lastIndexOf(searchString: string, position?: number): number;
+
+    /**
+      * Determines whether two strings are equivalent in the current locale.
+      * @param that String to compare to target string
+      */
+    localeCompare(that: string): number;
+
+    /**
+      * Matches a string with a regular expression, and returns an array containing the results of that search.
+      * @param regexp A variable name or string literal containing the regular expression pattern and flags.
+      */
+    match(regexp: string | RegExp): RegExpMatchArray | null;
+
+    /**
+      * Replaces text in a string, using a regular expression or search string.
+      * @param searchValue A string to search for.
+      * @param replaceValue A string containing the text to replace for every successful match of searchValue in this string.
+      */
+    replace(searchValue: string | RegExp, replaceValue: string): string;
+
+    /**
+      * Replaces text in a string, using a regular expression or search string.
+      * @param searchValue A string to search for.
+      * @param replacer A function that returns the replacement text.
+      */
+    replace(searchValue: string | RegExp, replacer: (substring: string, ...args: any[]) => string): string;
+
+    /**
+      * Finds the first substring match in a regular expression search.
+      * @param regexp The regular expression pattern and applicable flags.
+      */
+    search(regexp: string | RegExp): number;
+
+    /**
+      * Returns a section of a string.
+      * @param start The index to the beginning of the specified portion of stringObj.
+      * @param end The index to the end of the specified portion of stringObj. The substring includes the characters up to, but not including, the character indicated by end.
+      * If this value is not specified, the substring continues to the end of stringObj.
+      */
+    slice(start?: number, end?: number): string;
+
+    /**
+      * Split a string into substrings using the specified separator and return them as an array.
+      * @param separator A string that identifies character or characters to use in separating the string. If omitted, a single-element array containing the entire string is returned.
+      * @param limit A value used to limit the number of elements returned in the array.
+      */
+    split(separator: string | RegExp, limit?: number): string[];
+
+    /**
+      * Returns the substring at the specified location within a String object.
+      * @param start The zero-based index number indicating the beginning of the substring.
+      * @param end Zero-based index number indicating the end of the substring. The substring includes the characters up to, but not including, the character indicated by end.
+      * If end is omitted, the characters from start through the end of the original string are returned.
+      */
+    substring(start: number, end?: number): string;
+
+    /** Converts all the alphabetic characters in a string to lowercase. */
+    toLowerCase(): string;
+
+    /** Converts all alphabetic characters to lowercase, taking into account the host environment's current locale. */
+    toLocaleLowerCase(): string;
+
+    /** Converts all the alphabetic characters in a string to uppercase. */
+    toUpperCase(): string;
+
+    /** Returns a string where all alphabetic characters have been converted to uppercase, taking into account the host environment's current locale. */
+    toLocaleUpperCase(): string;
+
+    /** Removes the leading and trailing white space and line terminator characters from a string. */
+    trim(): string;
+
+    /** Returns the length of a String object. */
+    readonly length: number;
+
+    // IE extensions
+    /**
+      * Gets a substring beginning at the specified location and having the specified length.
+      * @param from The starting position of the desired substring. The index of the first character in the string is zero.
+      * @param length The number of characters to include in the returned substring.
+      */
+    substr(from: number, length?: number): string;
+
+    /** Returns the primitive value of the specified object. */
+    valueOf(): string;
+
+    readonly [index: number]: string;
+}
+
+interface StringConstructor {
+    new(value?: any): String;
+    (value?: any): string;
+    readonly prototype: String;
+    fromCharCode(...codes: number[]): string;
+}
+
+/**
+  * Allows manipulation and formatting of text strings and determination and location of substrings within strings.
+  */
+declare const String: StringConstructor;
+
+interface Boolean {
+    /** Returns the primitive value of the specified object. */
+    valueOf(): boolean;
+}
+
+interface BooleanConstructor {
+    new(value?: any): Boolean;
+    (value?: any): boolean;
+    readonly prototype: Boolean;
+}
+
+declare const Boolean: BooleanConstructor;
+
+interface Number {
+    /**
+      * Returns a string representation of an object.
+      * @param radix Specifies a radix for converting numeric values to strings. This value is only used for numbers.
+      */
+    toString(radix?: number): string;
+
+    /**
+      * Returns a string representing a number in fixed-point notation.
+      * @param fractionDigits Number of digits after the decimal point. Must be in the range 0 - 20, inclusive.
+      */
+    toFixed(fractionDigits?: number): string;
+
+    /**
+      * Returns a string containing a number represented in exponential notation.
+      * @param fractionDigits Number of digits after the decimal point. Must be in the range 0 - 20, inclusive.
+      */
+    toExponential(fractionDigits?: number): string;
+
+    /**
+      * Returns a string containing a number represented either in exponential or fixed-point notation with a specified number of digits.
+      * @param precision Number of significant digits. Must be in the range 1 - 21, inclusive.
+      */
+    toPrecision(precision?: number): string;
+
+    /** Returns the primitive value of the specified object. */
+    valueOf(): number;
+}
+
+interface NumberConstructor {
+    new(value?: any): Number;
+    (value?: any): number;
+    readonly prototype: Number;
+
+    /** The largest number that can be represented in JavaScript. Equal to approximately 1.79E+308. */
+    readonly MAX_VALUE: number;
+
+    /** The closest number to zero that can be represented in JavaScript. Equal to approximately 5.00E-324. */
+    readonly MIN_VALUE: number;
+
+    /**
+      * A value that is not a number.
+      * In equality comparisons, NaN does not equal any value, including itself. To test whether a value is equivalent to NaN, use the isNaN function.
+      */
+    readonly NaN: number;
+
+    /**
+      * A value that is less than the largest negative number that can be represented in JavaScript.
+      * JavaScript displays NEGATIVE_INFINITY values as -infinity.
+      */
+    readonly NEGATIVE_INFINITY: number;
+
+    /**
+      * A value greater than the largest number that can be represented in JavaScript.
+      * JavaScript displays POSITIVE_INFINITY values as infinity.
+      */
+    readonly POSITIVE_INFINITY: number;
+}
+
+/** An object that represents a number of any kind. All JavaScript numbers are 64-bit floating-point numbers. */
+declare const Number: NumberConstructor;
+
+interface TemplateStringsArray extends ReadonlyArray<string> {
+    readonly raw: ReadonlyArray<string>;
+}
+
+interface Math {
+    /** The mathematical constant e. This is Euler's number, the base of natural logarithms. */
+    readonly E: number;
+    /** The natural logarithm of 10. */
+    readonly LN10: number;
+    /** The natural logarithm of 2. */
+    readonly LN2: number;
+    /** The base-2 logarithm of e. */
+    readonly LOG2E: number;
+    /** The base-10 logarithm of e. */
+    readonly LOG10E: number;
+    /** Pi. This is the ratio of the circumference of a circle to its diameter. */
+    readonly PI: number;
+    /** The square root of 0.5, or, equivalently, one divided by the square root of 2. */
+    readonly SQRT1_2: number;
+    /** The square root of 2. */
+    readonly SQRT2: number;
+    /**
+      * Returns the absolute value of a number (the value without regard to whether it is positive or negative).
+      * For example, the absolute value of -5 is the same as the absolute value of 5.
+      * @param x A numeric expression for which the absolute value is needed.
+      */
+    abs(x: number): number;
+    /**
+      * Returns the arc cosine (or inverse cosine) of a number.
+      * @param x A numeric expression.
+      */
+    acos(x: number): number;
+    /**
+      * Returns the arcsine of a number.
+      * @param x A numeric expression.
+      */
+    asin(x: number): number;
+    /**
+      * Returns the arctangent of a number.
+      * @param x A numeric expression for which the arctangent is needed.
+      */
+    atan(x: number): number;
+    /**
+      * Returns the angle (in radians) from the X axis to a point.
+      * @param y A numeric expression representing the cartesian y-coordinate.
+      * @param x A numeric expression representing the cartesian x-coordinate.
+      */
+    atan2(y: number, x: number): number;
+    /**
+      * Returns the smallest number greater than or equal to its numeric argument.
+      * @param x A numeric expression.
+      */
+    ceil(x: number): number;
+    /**
+      * Returns the cosine of a number.
+      * @param x A numeric expression that contains an angle measured in radians.
+      */
+    cos(x: number): number;
+    /**
+      * Returns e (the base of natural logarithms) raised to a power.
+      * @param x A numeric expression representing the power of e.
+      */
+    exp(x: number): number;
+    /**
+      * Returns the greatest number less than or equal to its numeric argument.
+      * @param x A numeric expression.
+      */
+    floor(x: number): number;
+    /**
+      * Returns the natural logarithm (base e) of a number.
+      * @param x A numeric expression.
+      */
+    log(x: number): number;
+    /**
+      * Returns the larger of a set of supplied numeric expressions.
+      * @param values Numeric expressions to be evaluated.
+      */
+    max(...values: number[]): number;
+    /**
+      * Returns the smaller of a set of supplied numeric expressions.
+      * @param values Numeric expressions to be evaluated.
+      */
+    min(...values: number[]): number;
+    /**
+      * Returns the value of a base expression taken to a specified power.
+      * @param x The base value of the expression.
+      * @param y The exponent value of the expression.
+      */
+    pow(x: number, y: number): number;
+    /** Returns a pseudorandom number between 0 and 1. */
+    random(): number;
+    /**
+      * Returns a supplied numeric expression rounded to the nearest number.
+      * @param x The value to be rounded to the nearest number.
+      */
+    round(x: number): number;
+    /**
+      * Returns the sine of a number.
+      * @param x A numeric expression that contains an angle measured in radians.
+      */
+    sin(x: number): number;
+    /**
+      * Returns the square root of a number.
+      * @param x A numeric expression.
+      */
+    sqrt(x: number): number;
+    /**
+      * Returns the tangent of a number.
+      * @param x A numeric expression that contains an angle measured in radians.
+      */
+    tan(x: number): number;
+}
+/** An intrinsic object that provides basic mathematics functionality and constants. */
+declare const Math: Math;
+
+/** Enables basic storage and retrieval of dates and times. */
+interface Date {
+    /** Returns a string representation of a date. The format of the string depends on the locale. */
+    toString(): string;
+    /** Returns a date as a string value. */
+    toDateString(): string;
+    /** Returns a time as a string value. */
+    toTimeString(): string;
+    /** Returns a value as a string value appropriate to the host environment's current locale. */
+    toLocaleString(): string;
+    /** Returns a date as a string value appropriate to the host environment's current locale. */
+    toLocaleDateString(): string;
+    /** Returns a time as a string value appropriate to the host environment's current locale. */
+    toLocaleTimeString(): string;
+    /** Returns the stored time value in milliseconds since midnight, January 1, 1970 UTC. */
+    valueOf(): number;
+    /** Gets the time value in milliseconds. */
+    getTime(): number;
+    /** Gets the year, using local time. */
+    getFullYear(): number;
+    /** Gets the year using Universal Coordinated Time (UTC). */
+    getUTCFullYear(): number;
+    /** Gets the month, using local time. */
+    getMonth(): number;
+    /** Gets the month of a Date object using Universal Coordinated Time (UTC). */
+    getUTCMonth(): number;
+    /** Gets the day-of-the-month, using local time. */
+    getDate(): number;
+    /** Gets the day-of-the-month, using Universal Coordinated Time (UTC). */
+    getUTCDate(): number;
+    /** Gets the day of the week, using local time. */
+    getDay(): number;
+    /** Gets the day of the week using Universal Coordinated Time (UTC). */
+    getUTCDay(): number;
+    /** Gets the hours in a date, using local time. */
+    getHours(): number;
+    /** Gets the hours value in a Date object using Universal Coordinated Time (UTC). */
+    getUTCHours(): number;
+    /** Gets the minutes of a Date object, using local time. */
+    getMinutes(): number;
+    /** Gets the minutes of a Date object using Universal Coordinated Time (UTC). */
+    getUTCMinutes(): number;
+    /** Gets the seconds of a Date object, using local time. */
+    getSeconds(): number;
+    /** Gets the seconds of a Date object using Universal Coordinated Time (UTC). */
+    getUTCSeconds(): number;
+    /** Gets the milliseconds of a Date, using local time. */
+    getMilliseconds(): number;
+    /** Gets the milliseconds of a Date object using Universal Coordinated Time (UTC). */
+    getUTCMilliseconds(): number;
+    /** Gets the difference in minutes between the time on the local computer and Universal Coordinated Time (UTC). */
+    getTimezoneOffset(): number;
+    /**
+      * Sets the date and time value in the Date object.
+      * @param time A numeric value representing the number of elapsed milliseconds since midnight, January 1, 1970 GMT.
+      */
+    setTime(time: number): number;
+    /**
+      * Sets the milliseconds value in the Date object using local time.
+      * @param ms A numeric value equal to the millisecond value.
+      */
+    setMilliseconds(ms: number): number;
+    /**
+      * Sets the milliseconds value in the Date object using Universal Coordinated Time (UTC).
+      * @param ms A numeric value equal to the millisecond value.
+      */
+    setUTCMilliseconds(ms: number): number;
+
+    /**
+      * Sets the seconds value in the Date object using local time.
+      * @param sec A numeric value equal to the seconds value.
+      * @param ms A numeric value equal to the milliseconds value.
+      */
+    setSeconds(sec: number, ms?: number): number;
+    /**
+      * Sets the seconds value in the Date object using Universal Coordinated Time (UTC).
+      * @param sec A numeric value equal to the seconds value.
+      * @param ms A numeric value equal to the milliseconds value.
+      */
+    setUTCSeconds(sec: number, ms?: number): number;
+    /**
+      * Sets the minutes value in the Date object using local time.
+      * @param min A numeric value equal to the minutes value.
+      * @param sec A numeric value equal to the seconds value.
+      * @param ms A numeric value equal to the milliseconds value.
+      */
+    setMinutes(min: number, sec?: number, ms?: number): number;
+    /**
+      * Sets the minutes value in the Date object using Universal Coordinated Time (UTC).
+      * @param min A numeric value equal to the minutes value.
+      * @param sec A numeric value equal to the seconds value.
+      * @param ms A numeric value equal to the milliseconds value.
+      */
+    setUTCMinutes(min: number, sec?: number, ms?: number): number;
+    /**
+      * Sets the hour value in the Date object using local time.
+      * @param hours A numeric value equal to the hours value.
+      * @param min A numeric value equal to the minutes value.
+      * @param sec A numeric value equal to the seconds value.
+      * @param ms A numeric value equal to the milliseconds value.
+      */
+    setHours(hours: number, min?: number, sec?: number, ms?: number): number;
+    /**
+      * Sets the hours value in the Date object using Universal Coordinated Time (UTC).
+      * @param hours A numeric value equal to the hours value.
+      * @param min A numeric value equal to the minutes value.
+      * @param sec A numeric value equal to the seconds value.
+      * @param ms A numeric value equal to the milliseconds value.
+      */
+    setUTCHours(hours: number, min?: number, sec?: number, ms?: number): number;
+    /**
+      * Sets the numeric day-of-the-month value of the Date object using local time.
+      * @param date A numeric value equal to the day of the month.
+      */
+    setDate(date: number): number;
+    /**
+      * Sets the numeric day of the month in the Date object using Universal Coordinated Time (UTC).
+      * @param date A numeric value equal to the day of the month.
+      */
+    setUTCDate(date: number): number;
+    /**
+      * Sets the month value in the Date object using local time.
+      * @param month A numeric value equal to the month. The value for January is 0, and other month values follow consecutively.
+      * @param date A numeric value representing the day of the month. If this value is not supplied, the value from a call to the getDate method is used.
+      */
+    setMonth(month: number, date?: number): number;
+    /**
+      * Sets the month value in the Date object using Universal Coordinated Time (UTC).
+      * @param month A numeric value equal to the month. The value for January is 0, and other month values follow consecutively.
+      * @param date A numeric value representing the day of the month. If it is not supplied, the value from a call to the getUTCDate method is used.
+      */
+    setUTCMonth(month: number, date?: number): number;
+    /**
+      * Sets the year of the Date object using local time.
+      * @param year A numeric value for the year.
+      * @param month A zero-based numeric value for the month (0 for January, 11 for December). Must be specified if numDate is specified.
+      * @param date A numeric value equal for the day of the month.
+      */
+    setFullYear(year: number, month?: number, date?: number): number;
+    /**
+      * Sets the year value in the Date object using Universal Coordinated Time (UTC).
+      * @param year A numeric value equal to the year.
+      * @param month A numeric value equal to the month. The value for January is 0, and other month values follow consecutively. Must be supplied if numDate is supplied.
+      * @param date A numeric value equal to the day of the month.
+      */
+    setUTCFullYear(year: number, month?: number, date?: number): number;
+    /** Returns a date converted to a string using Universal Coordinated Time (UTC). */
+    toUTCString(): string;
+    /** Returns a date as a string value in ISO format. */
+    toISOString(): string;
+    /** Used by the JSON.stringify method to enable the transformation of an object's data for JavaScript Object Notation (JSON) serialization. */
+    toJSON(key?: any): string;
+}
+
+interface DateConstructor {
+    new(): Date;
+    new(value: number): Date;
+    new(value: string): Date;
+    new(year: number, month: number, date?: number, hours?: number, minutes?: number, seconds?: number, ms?: number): Date;
+    (): string;
+    readonly prototype: Date;
+    /**
+      * Parses a string containing a date, and returns the number of milliseconds between that date and midnight, January 1, 1970.
+      * @param s A date string
+      */
+    parse(s: string): number;
+    /**
+      * Returns the number of milliseconds between midnight, January 1, 1970 Universal Coordinated Time (UTC) (or GMT) and the specified date.
+      * @param year The full year designation is required for cross-century date accuracy. If year is between 0 and 99 is used, then year is assumed to be 1900 + year.
+      * @param month The month as an number between 0 and 11 (January to December).
+      * @param date The date as an number between 1 and 31.
+      * @param hours Must be supplied if minutes is supplied. An number from 0 to 23 (midnight to 11pm) that specifies the hour.
+      * @param minutes Must be supplied if seconds is supplied. An number from 0 to 59 that specifies the minutes.
+      * @param seconds Must be supplied if milliseconds is supplied. An number from 0 to 59 that specifies the seconds.
+      * @param ms An number from 0 to 999 that specifies the milliseconds.
+      */
+    UTC(year: number, month: number, date?: number, hours?: number, minutes?: number, seconds?: number, ms?: number): number;
+    now(): number;
+}
+
+declare const Date: DateConstructor;
+
+interface RegExpMatchArray extends Array<string> {
+    index?: number;
+    input?: string;
+}
+
+interface RegExpExecArray extends Array<string> {
+    index: number;
+    input: string;
+}
+
+interface RegExp {
+    /**
+      * Executes a search on a string using a regular expression pattern, and returns an array containing the results of that search.
+      * @param string The String object or string literal on which to perform the search.
+      */
+    exec(string: string): RegExpExecArray | null;
+
+    /**
+      * Returns a Boolean value that indicates whether or not a pattern exists in a searched string.
+      * @param string String on which to perform the search.
+      */
+    test(string: string): boolean;
+
+    /** Returns a copy of the text of the regular expression pattern. Read-only. The regExp argument is a Regular expression object. It can be a variable name or a literal. */
+    readonly source: string;
+
+    /** Returns a Boolean value indicating the state of the global flag (g) used with a regular expression. Default is false. Read-only. */
+    readonly global: boolean;
+
+    /** Returns a Boolean value indicating the state of the ignoreCase flag (i) used with a regular expression. Default is false. Read-only. */
+    readonly ignoreCase: boolean;
+
+    /** Returns a Boolean value indicating the state of the multiline flag (m) used with a regular expression. Default is false. Read-only. */
+    readonly multiline: boolean;
+
+    lastIndex: number;
+
+    // Non-standard extensions
+    compile(): this;
+}
+
+interface RegExpConstructor {
+    new(pattern: RegExp | string): RegExp;
+    new(pattern: string, flags?: string): RegExp;
+    (pattern: RegExp | string): RegExp;
+    (pattern: string, flags?: string): RegExp;
+    readonly prototype: RegExp;
+
+    // Non-standard extensions
+    $1: string;
+    $2: string;
+    $3: string;
+    $4: string;
+    $5: string;
+    $6: string;
+    $7: string;
+    $8: string;
+    $9: string;
+    lastMatch: string;
+}
+
+declare const RegExp: RegExpConstructor;
+
+interface Error {
+    name: string;
+    message: string;
+    stack?: string;
+}
+
+interface ErrorConstructor {
+    new(message?: string): Error;
+    (message?: string): Error;
+    readonly prototype: Error;
+}
+
+declare const Error: ErrorConstructor;
+
+interface EvalError extends Error {
+}
+
+interface EvalErrorConstructor {
+    new(message?: string): EvalError;
+    (message?: string): EvalError;
+    readonly prototype: EvalError;
+}
+
+declare const EvalError: EvalErrorConstructor;
+
+interface RangeError extends Error {
+}
+
+interface RangeErrorConstructor {
+    new(message?: string): RangeError;
+    (message?: string): RangeError;
+    readonly prototype: RangeError;
+}
+
+declare const RangeError: RangeErrorConstructor;
+
+interface ReferenceError extends Error {
+}
+
+interface ReferenceErrorConstructor {
+    new(message?: string): ReferenceError;
+    (message?: string): ReferenceError;
+    readonly prototype: ReferenceError;
+}
+
+declare const ReferenceError: ReferenceErrorConstructor;
+
+interface SyntaxError extends Error {
+}
+
+interface SyntaxErrorConstructor {
+    new(message?: string): SyntaxError;
+    (message?: string): SyntaxError;
+    readonly prototype: SyntaxError;
+}
+
+declare const SyntaxError: SyntaxErrorConstructor;
+
+interface TypeError extends Error {
+}
+
+interface TypeErrorConstructor {
+    new(message?: string): TypeError;
+    (message?: string): TypeError;
+    readonly prototype: TypeError;
+}
+
+declare const TypeError: TypeErrorConstructor;
+
+interface URIError extends Error {
+}
+
+interface URIErrorConstructor {
+    new(message?: string): URIError;
+    (message?: string): URIError;
+    readonly prototype: URIError;
+}
+
+declare const URIError: URIErrorConstructor;
+
+interface JSON {
+    /**
+      * Converts a JavaScript Object Notation (JSON) string into an object.
+      * @param text A valid JSON string.
+      * @param reviver A function that transforms the results. This function is called for each member of the object.
+      * If a member contains nested objects, the nested objects are transformed before the parent object is.
+      */
+    parse(text: string, reviver?: (key: any, value: any) => any): any;
+    /**
+      * Converts a JavaScript value to a JavaScript Object Notation (JSON) string.
+      * @param value A JavaScript value, usually an object or array, to be converted.
+      * @param replacer A function that transforms the results.
+      * @param space Adds indentation, white space, and line break characters to the return-value JSON text to make it easier to read.
+      */
+    stringify(value: any, replacer?: (key: string, value: any) => any, space?: string | number): string;
+    /**
+      * Converts a JavaScript value to a JavaScript Object Notation (JSON) string.
+      * @param value A JavaScript value, usually an object or array, to be converted.
+      * @param replacer An array of strings and numbers that acts as a approved list for selecting the object properties that will be stringified.
+      * @param space Adds indentation, white space, and line break characters to the return-value JSON text to make it easier to read.
+      */
+    stringify(value: any, replacer?: (number | string)[] | null, space?: string | number): string;
+}
+
+/**
+  * An intrinsic object that provides functions to convert JavaScript values to and from the JavaScript Object Notation (JSON) format.
+  */
+declare const JSON: JSON;
+
+
+/////////////////////////////
+/// ECMAScript Array API (specially handled by compiler)
+/////////////////////////////
+
+interface ReadonlyArray<T> {
+    /**
+      * Gets the length of the array. This is a number one higher than the highest element defined in an array.
+      */
+    readonly length: number;
+    /**
+      * Returns a string representation of an array.
+      */
+    toString(): string;
+    /**
+      * Returns a string representation of an array. The elements are converted to string using thier toLocalString methods.
+      */
+    toLocaleString(): string;
+    /**
+      * Combines two or more arrays.
+      * @param items Additional items to add to the end of array1.
+      */
+    concat(...items: T[][]): T[];
+    /**
+      * Combines two or more arrays.
+      * @param items Additional items to add to the end of array1.
+      */
+    concat(...items: (T | T[])[]): T[];
+    /**
+      * Adds all the elements of an array separated by the specified separator string.
+      * @param separator A string used to separate one element of an array from the next in the resulting String. If omitted, the array elements are separated with a comma.
+      */
+    join(separator?: string): string;
+    /**
+      * Returns a section of an array.
+      * @param start The beginning of the specified portion of the array.
+      * @param end The end of the specified portion of the array.
+      */
+    slice(start?: number, end?: number): T[];
+    /**
+      * Returns the index of the first occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the search starts at index 0.
+      */
+    indexOf(searchElement: T, fromIndex?: number): number;
+    /**
+      * Returns the index of the last occurrence of a specified value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the search starts at the last index in the array.
+      */
+    lastIndexOf(searchElement: T, fromIndex?: number): number;
+    /**
+      * Determines whether all the members of an array satisfy the specified test.
+      * @param callbackfn A function that accepts up to three arguments. The every method calls the callbackfn function for each element in array1 until the callbackfn returns false, or until the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
+      */
+    every(callbackfn: (value: T, index: number, array: ReadonlyArray<T>) => boolean, thisArg?: any): boolean;
+    /**
+      * Determines whether the specified callback function returns true for any element of an array.
+      * @param callbackfn A function that accepts up to three arguments. The some method calls the callbackfn function for each element in array1 until the callbackfn returns true, or until the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
+      */
+    some(callbackfn: (value: T, index: number, array: ReadonlyArray<T>) => boolean, thisArg?: any): boolean;
+    /**
+      * Performs the specified action for each element in an array.
+      * @param callbackfn  A function that accepts up to three arguments. forEach calls the callbackfn function one time for each element in the array.
+      * @param thisArg  An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
+      */
+    forEach(callbackfn: (value: T, index: number, array: ReadonlyArray<T>) => void, thisArg?: any): void;
+    /**
+      * Calls a defined callback function on each element of an array, and returns an array that contains the results.
+      * @param callbackfn A function that accepts up to three arguments. The map method calls the callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
+      */
+    map<U>(callbackfn: (value: T, index: number, array: ReadonlyArray<T>) => U, thisArg?: any): U[];
+    /**
+     * Returns the elements of an array that meet the condition specified in a callback function.
+     * @param callbackfn A function that accepts up to three arguments. The filter method calls the callbackfn function one time for each element in the array.
+     * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
+     */
+    filter<S extends T>(callbackfn: (value: T, index: number, array: ReadonlyArray<T>) => value is S, thisArg?: any): S[];
+    /**
+      * Returns the elements of an array that meet the condition specified in a callback function.
+      * @param callbackfn A function that accepts up to three arguments. The filter method calls the callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
+      */
+    filter(callbackfn: (value: T, index: number, array: ReadonlyArray<T>) => any, thisArg?: any): T[];
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
+      */
+    reduce(callbackfn: (previousValue: T, currentValue: T, currentIndex: number, array: ReadonlyArray<T>) => T, initialValue?: T): T;
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
+      */
+    reduce<U>(callbackfn: (previousValue: U, currentValue: T, currentIndex: number, array: ReadonlyArray<T>) => U, initialValue: U): U;
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
+      */
+    reduceRight(callbackfn: (previousValue: T, currentValue: T, currentIndex: number, array: ReadonlyArray<T>) => T, initialValue?: T): T;
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
+      */
+    reduceRight<U>(callbackfn: (previousValue: U, currentValue: T, currentIndex: number, array: ReadonlyArray<T>) => U, initialValue: U): U;
+
+    readonly [n: number]: T;
+}
+
+interface Array<T> {
+    /**
+      * Gets or sets the length of the array. This is a number one higher than the highest element defined in an array.
+      */
+    length: number;
+    /**
+      * Returns a string representation of an array.
+      */
+    toString(): string;
+    /**
+      * Returns a string representation of an array. The elements are converted to string using thier toLocalString methods.
+      */
+    toLocaleString(): string;
+    /**
+      * Appends new elements to an array, and returns the new length of the array.
+      * @param items New elements of the Array.
+      */
+    push(...items: T[]): number;
+    /**
+      * Removes the last element from an array and returns it.
+      */
+    pop(): T | undefined;
+    /**
+      * Combines two or more arrays.
+      * @param items Additional items to add to the end of array1.
+      */
+    concat(...items: T[][]): T[];
+    /**
+      * Combines two or more arrays.
+      * @param items Additional items to add to the end of array1.
+      */
+    concat(...items: (T | T[])[]): T[];
+    /**
+      * Adds all the elements of an array separated by the specified separator string.
+      * @param separator A string used to separate one element of an array from the next in the resulting String. If omitted, the array elements are separated with a comma.
+      */
+    join(separator?: string): string;
+    /**
+      * Reverses the elements in an Array.
+      */
+    reverse(): T[];
+    /**
+      * Removes the first element from an array and returns it.
+      */
+    shift(): T | undefined;
+    /**
+      * Returns a section of an array.
+      * @param start The beginning of the specified portion of the array.
+      * @param end The end of the specified portion of the array.
+      */
+    slice(start?: number, end?: number): T[];
+    /**
+      * Sorts an array.
+      * @param compareFn The name of the function used to determine the order of the elements. If omitted, the elements are sorted in ascending, ASCII character order.
+      */
+    sort(compareFn?: (a: T, b: T) => number): this;
+    /**
+      * Removes elements from an array and, if necessary, inserts new elements in their place, returning the deleted elements.
+      * @param start The zero-based location in the array from which to start removing elements.
+      * @param deleteCount The number of elements to remove.
+      */
+    splice(start: number, deleteCount?: number): T[];
+    /**
+      * Removes elements from an array and, if necessary, inserts new elements in their place, returning the deleted elements.
+      * @param start The zero-based location in the array from which to start removing elements.
+      * @param deleteCount The number of elements to remove.
+      * @param items Elements to insert into the array in place of the deleted elements.
+      */
+    splice(start: number, deleteCount: number, ...items: T[]): T[];
+    /**
+      * Inserts new elements at the start of an array.
+      * @param items  Elements to insert at the start of the Array.
+      */
+    unshift(...items: T[]): number;
+    /**
+      * Returns the index of the first occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the search starts at index 0.
+      */
+    indexOf(searchElement: T, fromIndex?: number): number;
+    /**
+      * Returns the index of the last occurrence of a specified value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the search starts at the last index in the array.
+      */
+    lastIndexOf(searchElement: T, fromIndex?: number): number;
+    /**
+      * Determines whether all the members of an array satisfy the specified test.
+      * @param callbackfn A function that accepts up to three arguments. The every method calls the callbackfn function for each element in array1 until the callbackfn returns false, or until the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
+      */
+    every(callbackfn: (value: T, index: number, array: T[]) => boolean, thisArg?: any): boolean;
+    /**
+      * Determines whether the specified callback function returns true for any element of an array.
+      * @param callbackfn A function that accepts up to three arguments. The some method calls the callbackfn function for each element in array1 until the callbackfn returns true, or until the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
+      */
+    some(callbackfn: (value: T, index: number, array: T[]) => boolean, thisArg?: any): boolean;
+    /**
+      * Performs the specified action for each element in an array.
+      * @param callbackfn  A function that accepts up to three arguments. forEach calls the callbackfn function one time for each element in the array.
+      * @param thisArg  An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
+      */
+    forEach(callbackfn: (value: T, index: number, array: T[]) => void, thisArg?: any): void;
+    /**
+      * Calls a defined callback function on each element of an array, and returns an array that contains the results.
+      * @param callbackfn A function that accepts up to three arguments. The map method calls the callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
+      */
+    map<U>(callbackfn: (value: T, index: number, array: T[]) => U, thisArg?: any): U[];
+    /**
+     * Returns the elements of an array that meet the condition specified in a callback function.
+     * @param callbackfn A function that accepts up to three arguments. The filter method calls the callbackfn function one time for each element in the array.
+     * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
+     */
+    filter<S extends T>(callbackfn: (value: T, index: number, array: T[]) => value is S, thisArg?: any): S[];
+    /**
+      * Returns the elements of an array that meet the condition specified in a callback function.
+      * @param callbackfn A function that accepts up to three arguments. The filter method calls the callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
+      */
+    filter(callbackfn: (value: T, index: number, array: T[]) => any, thisArg?: any): T[];
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
+      */
+    reduce(callbackfn: (previousValue: T, currentValue: T, currentIndex: number, array: T[]) => T, initialValue?: T): T;
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
+      */
+    reduce<U>(callbackfn: (previousValue: U, currentValue: T, currentIndex: number, array: T[]) => U, initialValue: U): U;
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
+      */
+    reduceRight(callbackfn: (previousValue: T, currentValue: T, currentIndex: number, array: T[]) => T, initialValue?: T): T;
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.
+      */
+    reduceRight<U>(callbackfn: (previousValue: U, currentValue: T, currentIndex: number, array: T[]) => U, initialValue: U): U;
+
+    [n: number]: T;
+}
+
+interface ArrayConstructor {
+    new(arrayLength?: number): any[];
+    new <T>(arrayLength: number): T[];
+    new <T>(...items: T[]): T[];
+    (arrayLength?: number): any[];
+    <T>(arrayLength: number): T[];
+    <T>(...items: T[]): T[];
+    isArray(arg: any): arg is Array<any>;
+    readonly prototype: Array<any>;
+}
+
+declare const Array: ArrayConstructor;
+
+interface TypedPropertyDescriptor<T> {
+    enumerable?: boolean;
+    configurable?: boolean;
+    writable?: boolean;
+    value?: T;
+    get?: () => T;
+    set?: (value: T) => void;
+}
+
+declare type ClassDecorator = <TFunction extends Function>(target: TFunction) => TFunction | void;
+declare type PropertyDecorator = (target: Object, propertyKey: string | symbol) => void;
+declare type MethodDecorator = <T>(target: Object, propertyKey: string | symbol, descriptor: TypedPropertyDescriptor<T>) => TypedPropertyDescriptor<T> | void;
+declare type ParameterDecorator = (target: Object, propertyKey: string | symbol, parameterIndex: number) => void;
+
+declare type PromiseConstructorLike = new <T>(executor: (resolve: (value?: T | PromiseLike<T>) => void, reject: (reason?: any) => void) => void) => PromiseLike<T>;
+
+interface PromiseLike<T> {
+    /**
+     * Attaches callbacks for the resolution and/or rejection of the Promise.
+     * @param onfulfilled The callback to execute when the Promise is resolved.
+     * @param onrejected The callback to execute when the Promise is rejected.
+     * @returns A Promise for the completion of which ever callback is executed.
+     */
+    then<TResult1 = T, TResult2 = never>(onfulfilled?: ((value: T) => TResult1 | PromiseLike<TResult1>) | undefined | null, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | undefined | null): PromiseLike<TResult1 | TResult2>;
+}
+
+/**
+ * Represents the completion of an asynchronous operation
+ */
+interface Promise<T> {
+    /**
+     * Attaches callbacks for the resolution and/or rejection of the Promise.
+     * @param onfulfilled The callback to execute when the Promise is resolved.
+     * @param onrejected The callback to execute when the Promise is rejected.
+     * @returns A Promise for the completion of which ever callback is executed.
+     */
+    then<TResult1 = T, TResult2 = never>(onfulfilled?: ((value: T) => TResult1 | PromiseLike<TResult1>) | undefined | null, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | undefined | null): Promise<TResult1 | TResult2>;
+
+    /**
+     * Attaches a callback for only the rejection of the Promise.
+     * @param onrejected The callback to execute when the Promise is rejected.
+     * @returns A Promise for the completion of the callback.
+     */
+    catch<TResult = never>(onrejected?: ((reason: any) => TResult | PromiseLike<TResult>) | undefined | null): Promise<T | TResult>;
+}
+
+interface ArrayLike<T> {
+    readonly length: number;
+    readonly [n: number]: T;
+}
+
+/**
+ * Make all properties in T optional
+ */
+type Partial<T> = {
+    [P in keyof T]?: T[P];
+};
+
+/**
+ * Make all properties in T readonly
+ */
+type Readonly<T> = {
+    readonly [P in keyof T]: T[P];
+};
+
+/**
+ * From T pick a set of properties K
+ */
+type Pick<T, K extends keyof T> = {
+    [P in K]: T[P];
+};
+
+/**
+ * Construct a type with a set of properties K of type T
+ */
+type Record<K extends string, T> = {
+    [P in K]: T;
+};
+
+/**
+ * Marker for contextual 'this' type
+ */
+interface ThisType<T> { }
+
+/**
+  * Represents a raw buffer of binary data, which is used to store data for the
+  * different typed arrays. ArrayBuffers cannot be read from or written to directly,
+  * but can be passed to a typed array or DataView Object to interpret the raw
+  * buffer as needed.
+  */
+interface ArrayBuffer {
+    /**
+      * Read-only. The length of the ArrayBuffer (in bytes).
+      */
+    readonly byteLength: number;
+
+    /**
+      * Returns a section of an ArrayBuffer.
+      */
+    slice(begin: number, end?: number): ArrayBuffer;
+}
+
+/**
+ * Allowed ArrayBuffer types for the buffer of an ArrayBufferView and related Typed Arrays.
+ */
+interface ArrayBufferTypes {
+    ArrayBuffer: ArrayBuffer;
+}
+type ArrayBufferLike = ArrayBufferTypes[keyof ArrayBufferTypes];
+
+interface ArrayBufferConstructor {
+    readonly prototype: ArrayBuffer;
+    new(byteLength: number): ArrayBuffer;
+    isView(arg: any): arg is ArrayBufferView;
+}
+declare const ArrayBuffer: ArrayBufferConstructor;
+
+interface ArrayBufferView {
+    /**
+      * The ArrayBuffer instance referenced by the array.
+      */
+    buffer: ArrayBufferLike;
+
+    /**
+      * The length in bytes of the array.
+      */
+    byteLength: number;
+
+    /**
+      * The offset in bytes of the array.
+      */
+    byteOffset: number;
+}
+
+interface DataView {
+    readonly buffer: ArrayBuffer;
+    readonly byteLength: number;
+    readonly byteOffset: number;
+    /**
+      * Gets the Float32 value at the specified byte offset from the start of the view. There is
+      * no alignment constraint; multi-byte values may be fetched from any offset.
+      * @param byteOffset The place in the buffer at which the value should be retrieved.
+      */
+    getFloat32(byteOffset: number, littleEndian?: boolean): number;
+
+    /**
+      * Gets the Float64 value at the specified byte offset from the start of the view. There is
+      * no alignment constraint; multi-byte values may be fetched from any offset.
+      * @param byteOffset The place in the buffer at which the value should be retrieved.
+      */
+    getFloat64(byteOffset: number, littleEndian?: boolean): number;
+
+    /**
+      * Gets the Int8 value at the specified byte offset from the start of the view. There is
+      * no alignment constraint; multi-byte values may be fetched from any offset.
+      * @param byteOffset The place in the buffer at which the value should be retrieved.
+      */
+    getInt8(byteOffset: number): number;
+
+    /**
+      * Gets the Int16 value at the specified byte offset from the start of the view. There is
+      * no alignment constraint; multi-byte values may be fetched from any offset.
+      * @param byteOffset The place in the buffer at which the value should be retrieved.
+      */
+    getInt16(byteOffset: number, littleEndian?: boolean): number;
+    /**
+      * Gets the Int32 value at the specified byte offset from the start of the view. There is
+      * no alignment constraint; multi-byte values may be fetched from any offset.
+      * @param byteOffset The place in the buffer at which the value should be retrieved.
+      */
+    getInt32(byteOffset: number, littleEndian?: boolean): number;
+
+    /**
+      * Gets the Uint8 value at the specified byte offset from the start of the view. There is
+      * no alignment constraint; multi-byte values may be fetched from any offset.
+      * @param byteOffset The place in the buffer at which the value should be retrieved.
+      */
+    getUint8(byteOffset: number): number;
+
+    /**
+      * Gets the Uint16 value at the specified byte offset from the start of the view. There is
+      * no alignment constraint; multi-byte values may be fetched from any offset.
+      * @param byteOffset The place in the buffer at which the value should be retrieved.
+      */
+    getUint16(byteOffset: number, littleEndian?: boolean): number;
+
+    /**
+      * Gets the Uint32 value at the specified byte offset from the start of the view. There is
+      * no alignment constraint; multi-byte values may be fetched from any offset.
+      * @param byteOffset The place in the buffer at which the value should be retrieved.
+      */
+    getUint32(byteOffset: number, littleEndian?: boolean): number;
+
+    /**
+      * Stores an Float32 value at the specified byte offset from the start of the view.
+      * @param byteOffset The place in the buffer at which the value should be set.
+      * @param value The value to set.
+      * @param littleEndian If false or undefined, a big-endian value should be written,
+      * otherwise a little-endian value should be written.
+      */
+    setFloat32(byteOffset: number, value: number, littleEndian?: boolean): void;
+
+    /**
+      * Stores an Float64 value at the specified byte offset from the start of the view.
+      * @param byteOffset The place in the buffer at which the value should be set.
+      * @param value The value to set.
+      * @param littleEndian If false or undefined, a big-endian value should be written,
+      * otherwise a little-endian value should be written.
+      */
+    setFloat64(byteOffset: number, value: number, littleEndian?: boolean): void;
+
+    /**
+      * Stores an Int8 value at the specified byte offset from the start of the view.
+      * @param byteOffset The place in the buffer at which the value should be set.
+      * @param value The value to set.
+      */
+    setInt8(byteOffset: number, value: number): void;
+
+    /**
+      * Stores an Int16 value at the specified byte offset from the start of the view.
+      * @param byteOffset The place in the buffer at which the value should be set.
+      * @param value The value to set.
+      * @param littleEndian If false or undefined, a big-endian value should be written,
+      * otherwise a little-endian value should be written.
+      */
+    setInt16(byteOffset: number, value: number, littleEndian?: boolean): void;
+
+    /**
+      * Stores an Int32 value at the specified byte offset from the start of the view.
+      * @param byteOffset The place in the buffer at which the value should be set.
+      * @param value The value to set.
+      * @param littleEndian If false or undefined, a big-endian value should be written,
+      * otherwise a little-endian value should be written.
+      */
+    setInt32(byteOffset: number, value: number, littleEndian?: boolean): void;
+
+    /**
+      * Stores an Uint8 value at the specified byte offset from the start of the view.
+      * @param byteOffset The place in the buffer at which the value should be set.
+      * @param value The value to set.
+      */
+    setUint8(byteOffset: number, value: number): void;
+
+    /**
+      * Stores an Uint16 value at the specified byte offset from the start of the view.
+      * @param byteOffset The place in the buffer at which the value should be set.
+      * @param value The value to set.
+      * @param littleEndian If false or undefined, a big-endian value should be written,
+      * otherwise a little-endian value should be written.
+      */
+    setUint16(byteOffset: number, value: number, littleEndian?: boolean): void;
+
+    /**
+      * Stores an Uint32 value at the specified byte offset from the start of the view.
+      * @param byteOffset The place in the buffer at which the value should be set.
+      * @param value The value to set.
+      * @param littleEndian If false or undefined, a big-endian value should be written,
+      * otherwise a little-endian value should be written.
+      */
+    setUint32(byteOffset: number, value: number, littleEndian?: boolean): void;
+}
+
+interface DataViewConstructor {
+    new(buffer: ArrayBufferLike, byteOffset?: number, byteLength?: number): DataView;
+}
+declare const DataView: DataViewConstructor;
+
+/**
+  * A typed array of 8-bit integer values. The contents are initialized to 0. If the requested
+  * number of bytes could not be allocated an exception is raised.
+  */
+interface Int8Array {
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * The ArrayBuffer instance referenced by the array.
+      */
+    readonly buffer: ArrayBufferLike;
+
+    /**
+      * The length in bytes of the array.
+      */
+    readonly byteLength: number;
+
+    /**
+      * The offset in bytes of the array.
+      */
+    readonly byteOffset: number;
+
+    /**
+      * Returns the this object after copying a section of the array identified by start and end
+      * to the same array starting at position target
+      * @param target If target is negative, it is treated as length+target where length is the
+      * length of the array.
+      * @param start If start is negative, it is treated as length+start. If end is negative, it
+      * is treated as length+end.
+      * @param end If not specified, length of the this object is used as its default value.
+      */
+    copyWithin(target: number, start: number, end?: number): this;
+
+    /**
+      * Determines whether all the members of an array satisfy the specified test.
+      * @param callbackfn A function that accepts up to three arguments. The every method calls
+      * the callbackfn function for each element in array1 until the callbackfn returns false,
+      * or until the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    every(callbackfn: (value: number, index: number, array: Int8Array) => boolean, thisArg?: any): boolean;
+
+    /**
+        * Returns the this object after filling the section identified by start and end with value
+        * @param value value to fill array section with
+        * @param start index to start filling the array at. If start is negative, it is treated as
+        * length+start where length is the length of the array.
+        * @param end index to stop filling the array at. If end is negative, it is treated as
+        * length+end.
+        */
+    fill(value: number, start?: number, end?: number): this;
+
+    /**
+      * Returns the elements of an array that meet the condition specified in a callback function.
+      * @param callbackfn A function that accepts up to three arguments. The filter method calls
+      * the callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    filter(callbackfn: (value: number, index: number, array: Int8Array) => any, thisArg?: any): Int8Array;
+
+    /**
+      * Returns the value of the first element in the array where predicate is true, and undefined
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found, find
+      * immediately returns that element value. Otherwise, find returns undefined.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
+
+    /**
+      * Returns the index of the first element in the array where predicate is true, and -1
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found,
+      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
+
+    /**
+      * Performs the specified action for each element in an array.
+      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    forEach(callbackfn: (value: number, index: number, array: Int8Array) => void, thisArg?: any): void;
+
+    /**
+      * Returns the index of the first occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      *  search starts at index 0.
+      */
+    indexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * Adds all the elements of an array separated by the specified separator string.
+      * @param separator A string used to separate one element of an array from the next in the
+      * resulting String. If omitted, the array elements are separated with a comma.
+      */
+    join(separator?: string): string;
+
+    /**
+      * Returns the index of the last occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      * search starts at index 0.
+      */
+    lastIndexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * The length of the array.
+      */
+    readonly length: number;
+
+    /**
+      * Calls a defined callback function on each element of an array, and returns an array that
+      * contains the results.
+      * @param callbackfn A function that accepts up to three arguments. The map method calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    map(callbackfn: (this: void, value: number, index: number, array: Int8Array) => number, thisArg?: any): Int8Array;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Int8Array) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Int8Array) => U, initialValue: U): U;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an
+      * argument instead of an array value.
+      */
+    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Int8Array) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Int8Array) => U, initialValue: U): U;
+
+    /**
+      * Reverses the elements in an Array.
+      */
+    reverse(): Int8Array;
+
+    /**
+      * Sets a value or an array of values.
+      * @param array A typed or untyped array of values to set.
+      * @param offset The index in the current array at which the values are to be written.
+      */
+    set(array: ArrayLike<number>, offset?: number): void;
+
+    /**
+      * Returns a section of an array.
+      * @param start The beginning of the specified portion of the array.
+      * @param end The end of the specified portion of the array.
+      */
+    slice(start?: number, end?: number): Int8Array;
+
+    /**
+      * Determines whether the specified callback function returns true for any element of an array.
+      * @param callbackfn A function that accepts up to three arguments. The some method calls the
+      * callbackfn function for each element in array1 until the callbackfn returns true, or until
+      * the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    some(callbackfn: (value: number, index: number, array: Int8Array) => boolean, thisArg?: any): boolean;
+
+    /**
+      * Sorts an array.
+      * @param compareFn The name of the function used to determine the order of the elements. If
+      * omitted, the elements are sorted in ascending, ASCII character order.
+      */
+    sort(compareFn?: (a: number, b: number) => number): this;
+
+    /**
+      * Gets a new Int8Array view of the ArrayBuffer store for this array, referencing the elements
+      * at begin, inclusive, up to end, exclusive.
+      * @param begin The index of the beginning of the array.
+      * @param end The index of the end of the array.
+      */
+    subarray(begin: number, end?: number): Int8Array;
+
+    /**
+      * Converts a number to a string by using the current locale.
+      */
+    toLocaleString(): string;
+
+    /**
+      * Returns a string representation of an array.
+      */
+    toString(): string;
+
+    [index: number]: number;
+}
+interface Int8ArrayConstructor {
+    readonly prototype: Int8Array;
+    new(length: number): Int8Array;
+    new(array: ArrayLike<number>): Int8Array;
+    new(buffer: ArrayBufferLike, byteOffset?: number, length?: number): Int8Array;
+
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * Returns a new array from a set of elements.
+      * @param items A set of elements to include in the new array object.
+      */
+    of(...items: number[]): Int8Array;
+
+    /**
+      * Creates an array from an array-like or iterable object.
+      * @param arrayLike An array-like or iterable object to convert to an array.
+      * @param mapfn A mapping function to call on every element of the array.
+      * @param thisArg Value of 'this' used to invoke the mapfn.
+      */
+    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Int8Array;
+
+
+}
+declare const Int8Array: Int8ArrayConstructor;
+
+/**
+  * A typed array of 8-bit unsigned integer values. The contents are initialized to 0. If the
+  * requested number of bytes could not be allocated an exception is raised.
+  */
+interface Uint8Array {
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * The ArrayBuffer instance referenced by the array.
+      */
+    readonly buffer: ArrayBufferLike;
+
+    /**
+      * The length in bytes of the array.
+      */
+    readonly byteLength: number;
+
+    /**
+      * The offset in bytes of the array.
+      */
+    readonly byteOffset: number;
+
+    /**
+      * Returns the this object after copying a section of the array identified by start and end
+      * to the same array starting at position target
+      * @param target If target is negative, it is treated as length+target where length is the
+      * length of the array.
+      * @param start If start is negative, it is treated as length+start. If end is negative, it
+      * is treated as length+end.
+      * @param end If not specified, length of the this object is used as its default value.
+      */
+    copyWithin(target: number, start: number, end?: number): this;
+
+    /**
+      * Determines whether all the members of an array satisfy the specified test.
+      * @param callbackfn A function that accepts up to three arguments. The every method calls
+      * the callbackfn function for each element in array1 until the callbackfn returns false,
+      * or until the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    every(callbackfn: (value: number, index: number, array: Uint8Array) => boolean, thisArg?: any): boolean;
+
+    /**
+        * Returns the this object after filling the section identified by start and end with value
+        * @param value value to fill array section with
+        * @param start index to start filling the array at. If start is negative, it is treated as
+        * length+start where length is the length of the array.
+        * @param end index to stop filling the array at. If end is negative, it is treated as
+        * length+end.
+        */
+    fill(value: number, start?: number, end?: number): this;
+
+    /**
+      * Returns the elements of an array that meet the condition specified in a callback function.
+      * @param callbackfn A function that accepts up to three arguments. The filter method calls
+      * the callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    filter(callbackfn: (value: number, index: number, array: Uint8Array) => any, thisArg?: any): Uint8Array;
+
+    /**
+      * Returns the value of the first element in the array where predicate is true, and undefined
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found, find
+      * immediately returns that element value. Otherwise, find returns undefined.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
+
+    /**
+      * Returns the index of the first element in the array where predicate is true, and -1
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found,
+      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
+
+    /**
+      * Performs the specified action for each element in an array.
+      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    forEach(callbackfn: (value: number, index: number, array: Uint8Array) => void, thisArg?: any): void;
+
+    /**
+      * Returns the index of the first occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      *  search starts at index 0.
+      */
+    indexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * Adds all the elements of an array separated by the specified separator string.
+      * @param separator A string used to separate one element of an array from the next in the
+      * resulting String. If omitted, the array elements are separated with a comma.
+      */
+    join(separator?: string): string;
+
+    /**
+      * Returns the index of the last occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      * search starts at index 0.
+      */
+    lastIndexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * The length of the array.
+      */
+    readonly length: number;
+
+    /**
+      * Calls a defined callback function on each element of an array, and returns an array that
+      * contains the results.
+      * @param callbackfn A function that accepts up to three arguments. The map method calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    map(callbackfn: (this: void, value: number, index: number, array: Uint8Array) => number, thisArg?: any): Uint8Array;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Uint8Array) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Uint8Array) => U, initialValue: U): U;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an
+      * argument instead of an array value.
+      */
+    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Uint8Array) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Uint8Array) => U, initialValue: U): U;
+
+    /**
+      * Reverses the elements in an Array.
+      */
+    reverse(): Uint8Array;
+
+    /**
+      * Sets a value or an array of values.
+      * @param array A typed or untyped array of values to set.
+      * @param offset The index in the current array at which the values are to be written.
+      */
+    set(array: ArrayLike<number>, offset?: number): void;
+
+    /**
+      * Returns a section of an array.
+      * @param start The beginning of the specified portion of the array.
+      * @param end The end of the specified portion of the array.
+      */
+    slice(start?: number, end?: number): Uint8Array;
+
+    /**
+      * Determines whether the specified callback function returns true for any element of an array.
+      * @param callbackfn A function that accepts up to three arguments. The some method calls the
+      * callbackfn function for each element in array1 until the callbackfn returns true, or until
+      * the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    some(callbackfn: (value: number, index: number, array: Uint8Array) => boolean, thisArg?: any): boolean;
+
+    /**
+      * Sorts an array.
+      * @param compareFn The name of the function used to determine the order of the elements. If
+      * omitted, the elements are sorted in ascending, ASCII character order.
+      */
+    sort(compareFn?: (a: number, b: number) => number): this;
+
+    /**
+      * Gets a new Uint8Array view of the ArrayBuffer store for this array, referencing the elements
+      * at begin, inclusive, up to end, exclusive.
+      * @param begin The index of the beginning of the array.
+      * @param end The index of the end of the array.
+      */
+    subarray(begin: number, end?: number): Uint8Array;
+
+    /**
+      * Converts a number to a string by using the current locale.
+      */
+    toLocaleString(): string;
+
+    /**
+      * Returns a string representation of an array.
+      */
+    toString(): string;
+
+    [index: number]: number;
+}
+
+interface Uint8ArrayConstructor {
+    readonly prototype: Uint8Array;
+    new(length: number): Uint8Array;
+    new(array: ArrayLike<number>): Uint8Array;
+    new(buffer: ArrayBufferLike, byteOffset?: number, length?: number): Uint8Array;
+
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * Returns a new array from a set of elements.
+      * @param items A set of elements to include in the new array object.
+      */
+    of(...items: number[]): Uint8Array;
+
+    /**
+      * Creates an array from an array-like or iterable object.
+      * @param arrayLike An array-like or iterable object to convert to an array.
+      * @param mapfn A mapping function to call on every element of the array.
+      * @param thisArg Value of 'this' used to invoke the mapfn.
+      */
+    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Uint8Array;
+
+}
+declare const Uint8Array: Uint8ArrayConstructor;
+
+/**
+  * A typed array of 8-bit unsigned integer (clamped) values. The contents are initialized to 0.
+  * If the requested number of bytes could not be allocated an exception is raised.
+  */
+interface Uint8ClampedArray {
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * The ArrayBuffer instance referenced by the array.
+      */
+    readonly buffer: ArrayBufferLike;
+
+    /**
+      * The length in bytes of the array.
+      */
+    readonly byteLength: number;
+
+    /**
+      * The offset in bytes of the array.
+      */
+    readonly byteOffset: number;
+
+    /**
+      * Returns the this object after copying a section of the array identified by start and end
+      * to the same array starting at position target
+      * @param target If target is negative, it is treated as length+target where length is the
+      * length of the array.
+      * @param start If start is negative, it is treated as length+start. If end is negative, it
+      * is treated as length+end.
+      * @param end If not specified, length of the this object is used as its default value.
+      */
+    copyWithin(target: number, start: number, end?: number): this;
+
+    /**
+      * Determines whether all the members of an array satisfy the specified test.
+      * @param callbackfn A function that accepts up to three arguments. The every method calls
+      * the callbackfn function for each element in array1 until the callbackfn returns false,
+      * or until the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    every(callbackfn: (value: number, index: number, array: Uint8ClampedArray) => boolean, thisArg?: any): boolean;
+
+    /**
+        * Returns the this object after filling the section identified by start and end with value
+        * @param value value to fill array section with
+        * @param start index to start filling the array at. If start is negative, it is treated as
+        * length+start where length is the length of the array.
+        * @param end index to stop filling the array at. If end is negative, it is treated as
+        * length+end.
+        */
+    fill(value: number, start?: number, end?: number): this;
+
+    /**
+      * Returns the elements of an array that meet the condition specified in a callback function.
+      * @param callbackfn A function that accepts up to three arguments. The filter method calls
+      * the callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    filter(callbackfn: (value: number, index: number, array: Uint8ClampedArray) => any, thisArg?: any): Uint8ClampedArray;
+
+    /**
+      * Returns the value of the first element in the array where predicate is true, and undefined
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found, find
+      * immediately returns that element value. Otherwise, find returns undefined.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
+
+    /**
+      * Returns the index of the first element in the array where predicate is true, and -1
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found,
+      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
+
+    /**
+      * Performs the specified action for each element in an array.
+      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    forEach(callbackfn: (value: number, index: number, array: Uint8ClampedArray) => void, thisArg?: any): void;
+
+    /**
+      * Returns the index of the first occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      *  search starts at index 0.
+      */
+    indexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * Adds all the elements of an array separated by the specified separator string.
+      * @param separator A string used to separate one element of an array from the next in the
+      * resulting String. If omitted, the array elements are separated with a comma.
+      */
+    join(separator?: string): string;
+
+    /**
+      * Returns the index of the last occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      * search starts at index 0.
+      */
+    lastIndexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * The length of the array.
+      */
+    readonly length: number;
+
+    /**
+      * Calls a defined callback function on each element of an array, and returns an array that
+      * contains the results.
+      * @param callbackfn A function that accepts up to three arguments. The map method calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    map(callbackfn: (this: void, value: number, index: number, array: Uint8ClampedArray) => number, thisArg?: any): Uint8ClampedArray;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Uint8ClampedArray) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Uint8ClampedArray) => U, initialValue: U): U;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an
+      * argument instead of an array value.
+      */
+    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Uint8ClampedArray) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Uint8ClampedArray) => U, initialValue: U): U;
+
+    /**
+      * Reverses the elements in an Array.
+      */
+    reverse(): Uint8ClampedArray;
+
+    /**
+      * Sets a value or an array of values.
+      * @param array A typed or untyped array of values to set.
+      * @param offset The index in the current array at which the values are to be written.
+      */
+    set(array: ArrayLike<number>, offset?: number): void;
+
+    /**
+      * Returns a section of an array.
+      * @param start The beginning of the specified portion of the array.
+      * @param end The end of the specified portion of the array.
+      */
+    slice(start?: number, end?: number): Uint8ClampedArray;
+
+    /**
+      * Determines whether the specified callback function returns true for any element of an array.
+      * @param callbackfn A function that accepts up to three arguments. The some method calls the
+      * callbackfn function for each element in array1 until the callbackfn returns true, or until
+      * the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    some(callbackfn: (value: number, index: number, array: Uint8ClampedArray) => boolean, thisArg?: any): boolean;
+
+    /**
+      * Sorts an array.
+      * @param compareFn The name of the function used to determine the order of the elements. If
+      * omitted, the elements are sorted in ascending, ASCII character order.
+      */
+    sort(compareFn?: (a: number, b: number) => number): this;
+
+    /**
+      * Gets a new Uint8ClampedArray view of the ArrayBuffer store for this array, referencing the elements
+      * at begin, inclusive, up to end, exclusive.
+      * @param begin The index of the beginning of the array.
+      * @param end The index of the end of the array.
+      */
+    subarray(begin: number, end?: number): Uint8ClampedArray;
+
+    /**
+      * Converts a number to a string by using the current locale.
+      */
+    toLocaleString(): string;
+
+    /**
+      * Returns a string representation of an array.
+      */
+    toString(): string;
+
+    [index: number]: number;
+}
+
+interface Uint8ClampedArrayConstructor {
+    readonly prototype: Uint8ClampedArray;
+    new(length: number): Uint8ClampedArray;
+    new(array: ArrayLike<number>): Uint8ClampedArray;
+    new(buffer: ArrayBufferLike, byteOffset?: number, length?: number): Uint8ClampedArray;
+
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * Returns a new array from a set of elements.
+      * @param items A set of elements to include in the new array object.
+      */
+    of(...items: number[]): Uint8ClampedArray;
+
+    /**
+      * Creates an array from an array-like or iterable object.
+      * @param arrayLike An array-like or iterable object to convert to an array.
+      * @param mapfn A mapping function to call on every element of the array.
+      * @param thisArg Value of 'this' used to invoke the mapfn.
+      */
+    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Uint8ClampedArray;
+}
+declare const Uint8ClampedArray: Uint8ClampedArrayConstructor;
+
+/**
+  * A typed array of 16-bit signed integer values. The contents are initialized to 0. If the
+  * requested number of bytes could not be allocated an exception is raised.
+  */
+interface Int16Array {
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * The ArrayBuffer instance referenced by the array.
+      */
+    readonly buffer: ArrayBufferLike;
+
+    /**
+      * The length in bytes of the array.
+      */
+    readonly byteLength: number;
+
+    /**
+      * The offset in bytes of the array.
+      */
+    readonly byteOffset: number;
+
+    /**
+      * Returns the this object after copying a section of the array identified by start and end
+      * to the same array starting at position target
+      * @param target If target is negative, it is treated as length+target where length is the
+      * length of the array.
+      * @param start If start is negative, it is treated as length+start. If end is negative, it
+      * is treated as length+end.
+      * @param end If not specified, length of the this object is used as its default value.
+      */
+    copyWithin(target: number, start: number, end?: number): this;
+
+    /**
+      * Determines whether all the members of an array satisfy the specified test.
+      * @param callbackfn A function that accepts up to three arguments. The every method calls
+      * the callbackfn function for each element in array1 until the callbackfn returns false,
+      * or until the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    every(callbackfn: (value: number, index: number, array: Int16Array) => boolean, thisArg?: any): boolean;
+
+    /**
+        * Returns the this object after filling the section identified by start and end with value
+        * @param value value to fill array section with
+        * @param start index to start filling the array at. If start is negative, it is treated as
+        * length+start where length is the length of the array.
+        * @param end index to stop filling the array at. If end is negative, it is treated as
+        * length+end.
+        */
+    fill(value: number, start?: number, end?: number): this;
+
+    /**
+      * Returns the elements of an array that meet the condition specified in a callback function.
+      * @param callbackfn A function that accepts up to three arguments. The filter method calls
+      * the callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    filter(callbackfn: (this: void, value: number, index: number, array: Int16Array) => any, thisArg?: any): Int16Array;
+
+    /**
+      * Returns the value of the first element in the array where predicate is true, and undefined
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found, find
+      * immediately returns that element value. Otherwise, find returns undefined.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
+
+    /**
+      * Returns the index of the first element in the array where predicate is true, and -1
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found,
+      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
+
+    /**
+      * Performs the specified action for each element in an array.
+      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    forEach(callbackfn: (value: number, index: number, array: Int16Array) => void, thisArg?: any): void;
+    /**
+      * Returns the index of the first occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      *  search starts at index 0.
+      */
+    indexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * Adds all the elements of an array separated by the specified separator string.
+      * @param separator A string used to separate one element of an array from the next in the
+      * resulting String. If omitted, the array elements are separated with a comma.
+      */
+    join(separator?: string): string;
+
+    /**
+      * Returns the index of the last occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      * search starts at index 0.
+      */
+    lastIndexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * The length of the array.
+      */
+    readonly length: number;
+
+    /**
+      * Calls a defined callback function on each element of an array, and returns an array that
+      * contains the results.
+      * @param callbackfn A function that accepts up to three arguments. The map method calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    map(callbackfn: (this: void, value: number, index: number, array: Int16Array) => number, thisArg?: any): Int16Array;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Int16Array) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Int16Array) => U, initialValue: U): U;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an
+      * argument instead of an array value.
+      */
+    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Int16Array) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Int16Array) => U, initialValue: U): U;
+
+    /**
+      * Reverses the elements in an Array.
+      */
+    reverse(): Int16Array;
+
+    /**
+      * Sets a value or an array of values.
+      * @param array A typed or untyped array of values to set.
+      * @param offset The index in the current array at which the values are to be written.
+      */
+    set(array: ArrayLike<number>, offset?: number): void;
+
+    /**
+      * Returns a section of an array.
+      * @param start The beginning of the specified portion of the array.
+      * @param end The end of the specified portion of the array.
+      */
+    slice(start?: number, end?: number): Int16Array;
+
+    /**
+      * Determines whether the specified callback function returns true for any element of an array.
+      * @param callbackfn A function that accepts up to three arguments. The some method calls the
+      * callbackfn function for each element in array1 until the callbackfn returns true, or until
+      * the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    some(callbackfn: (value: number, index: number, array: Int16Array) => boolean, thisArg?: any): boolean;
+
+    /**
+      * Sorts an array.
+      * @param compareFn The name of the function used to determine the order of the elements. If
+      * omitted, the elements are sorted in ascending, ASCII character order.
+      */
+    sort(compareFn?: (a: number, b: number) => number): this;
+
+    /**
+      * Gets a new Int16Array view of the ArrayBuffer store for this array, referencing the elements
+      * at begin, inclusive, up to end, exclusive.
+      * @param begin The index of the beginning of the array.
+      * @param end The index of the end of the array.
+      */
+    subarray(begin: number, end?: number): Int16Array;
+
+    /**
+      * Converts a number to a string by using the current locale.
+      */
+    toLocaleString(): string;
+
+    /**
+      * Returns a string representation of an array.
+      */
+    toString(): string;
+
+    [index: number]: number;
+}
+
+interface Int16ArrayConstructor {
+    readonly prototype: Int16Array;
+    new(length: number): Int16Array;
+    new(array: ArrayLike<number>): Int16Array;
+    new(buffer: ArrayBufferLike, byteOffset?: number, length?: number): Int16Array;
+
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * Returns a new array from a set of elements.
+      * @param items A set of elements to include in the new array object.
+      */
+    of(...items: number[]): Int16Array;
+
+    /**
+      * Creates an array from an array-like or iterable object.
+      * @param arrayLike An array-like or iterable object to convert to an array.
+      * @param mapfn A mapping function to call on every element of the array.
+      * @param thisArg Value of 'this' used to invoke the mapfn.
+      */
+    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Int16Array;
+
+
+}
+declare const Int16Array: Int16ArrayConstructor;
+
+/**
+  * A typed array of 16-bit unsigned integer values. The contents are initialized to 0. If the
+  * requested number of bytes could not be allocated an exception is raised.
+  */
+interface Uint16Array {
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * The ArrayBuffer instance referenced by the array.
+      */
+    readonly buffer: ArrayBufferLike;
+
+    /**
+      * The length in bytes of the array.
+      */
+    readonly byteLength: number;
+
+    /**
+      * The offset in bytes of the array.
+      */
+    readonly byteOffset: number;
+
+    /**
+      * Returns the this object after copying a section of the array identified by start and end
+      * to the same array starting at position target
+      * @param target If target is negative, it is treated as length+target where length is the
+      * length of the array.
+      * @param start If start is negative, it is treated as length+start. If end is negative, it
+      * is treated as length+end.
+      * @param end If not specified, length of the this object is used as its default value.
+      */
+    copyWithin(target: number, start: number, end?: number): this;
+
+    /**
+      * Determines whether all the members of an array satisfy the specified test.
+      * @param callbackfn A function that accepts up to three arguments. The every method calls
+      * the callbackfn function for each element in array1 until the callbackfn returns false,
+      * or until the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    every(callbackfn: (value: number, index: number, array: Uint16Array) => boolean, thisArg?: any): boolean;
+
+    /**
+        * Returns the this object after filling the section identified by start and end with value
+        * @param value value to fill array section with
+        * @param start index to start filling the array at. If start is negative, it is treated as
+        * length+start where length is the length of the array.
+        * @param end index to stop filling the array at. If end is negative, it is treated as
+        * length+end.
+        */
+    fill(value: number, start?: number, end?: number): this;
+
+    /**
+      * Returns the elements of an array that meet the condition specified in a callback function.
+      * @param callbackfn A function that accepts up to three arguments. The filter method calls
+      * the callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    filter(callbackfn: (value: number, index: number, array: Uint16Array) => any, thisArg?: any): Uint16Array;
+
+    /**
+      * Returns the value of the first element in the array where predicate is true, and undefined
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found, find
+      * immediately returns that element value. Otherwise, find returns undefined.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
+
+    /**
+      * Returns the index of the first element in the array where predicate is true, and -1
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found,
+      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
+
+    /**
+      * Performs the specified action for each element in an array.
+      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    forEach(callbackfn: (value: number, index: number, array: Uint16Array) => void, thisArg?: any): void;
+
+    /**
+      * Returns the index of the first occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      *  search starts at index 0.
+      */
+    indexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * Adds all the elements of an array separated by the specified separator string.
+      * @param separator A string used to separate one element of an array from the next in the
+      * resulting String. If omitted, the array elements are separated with a comma.
+      */
+    join(separator?: string): string;
+
+    /**
+      * Returns the index of the last occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      * search starts at index 0.
+      */
+    lastIndexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * The length of the array.
+      */
+    readonly length: number;
+
+    /**
+      * Calls a defined callback function on each element of an array, and returns an array that
+      * contains the results.
+      * @param callbackfn A function that accepts up to three arguments. The map method calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    map(callbackfn: (this: void, value: number, index: number, array: Uint16Array) => number, thisArg?: any): Uint16Array;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Uint16Array) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Uint16Array) => U, initialValue: U): U;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an
+      * argument instead of an array value.
+      */
+    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Uint16Array) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Uint16Array) => U, initialValue: U): U;
+
+    /**
+      * Reverses the elements in an Array.
+      */
+    reverse(): Uint16Array;
+
+    /**
+      * Sets a value or an array of values.
+      * @param array A typed or untyped array of values to set.
+      * @param offset The index in the current array at which the values are to be written.
+      */
+    set(array: ArrayLike<number>, offset?: number): void;
+
+    /**
+      * Returns a section of an array.
+      * @param start The beginning of the specified portion of the array.
+      * @param end The end of the specified portion of the array.
+      */
+    slice(start?: number, end?: number): Uint16Array;
+
+    /**
+      * Determines whether the specified callback function returns true for any element of an array.
+      * @param callbackfn A function that accepts up to three arguments. The some method calls the
+      * callbackfn function for each element in array1 until the callbackfn returns true, or until
+      * the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    some(callbackfn: (value: number, index: number, array: Uint16Array) => boolean, thisArg?: any): boolean;
+
+    /**
+      * Sorts an array.
+      * @param compareFn The name of the function used to determine the order of the elements. If
+      * omitted, the elements are sorted in ascending, ASCII character order.
+      */
+    sort(compareFn?: (a: number, b: number) => number): this;
+
+    /**
+      * Gets a new Uint16Array view of the ArrayBuffer store for this array, referencing the elements
+      * at begin, inclusive, up to end, exclusive.
+      * @param begin The index of the beginning of the array.
+      * @param end The index of the end of the array.
+      */
+    subarray(begin: number, end?: number): Uint16Array;
+
+    /**
+      * Converts a number to a string by using the current locale.
+      */
+    toLocaleString(): string;
+
+    /**
+      * Returns a string representation of an array.
+      */
+    toString(): string;
+
+    [index: number]: number;
+}
+
+interface Uint16ArrayConstructor {
+    readonly prototype: Uint16Array;
+    new(length: number): Uint16Array;
+    new(array: ArrayLike<number>): Uint16Array;
+    new(buffer: ArrayBufferLike, byteOffset?: number, length?: number): Uint16Array;
+
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * Returns a new array from a set of elements.
+      * @param items A set of elements to include in the new array object.
+      */
+    of(...items: number[]): Uint16Array;
+
+    /**
+      * Creates an array from an array-like or iterable object.
+      * @param arrayLike An array-like or iterable object to convert to an array.
+      * @param mapfn A mapping function to call on every element of the array.
+      * @param thisArg Value of 'this' used to invoke the mapfn.
+      */
+    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Uint16Array;
+
+
+}
+declare const Uint16Array: Uint16ArrayConstructor;
+/**
+  * A typed array of 32-bit signed integer values. The contents are initialized to 0. If the
+  * requested number of bytes could not be allocated an exception is raised.
+  */
+interface Int32Array {
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * The ArrayBuffer instance referenced by the array.
+      */
+    readonly buffer: ArrayBufferLike;
+
+    /**
+      * The length in bytes of the array.
+      */
+    readonly byteLength: number;
+
+    /**
+      * The offset in bytes of the array.
+      */
+    readonly byteOffset: number;
+
+    /**
+      * Returns the this object after copying a section of the array identified by start and end
+      * to the same array starting at position target
+      * @param target If target is negative, it is treated as length+target where length is the
+      * length of the array.
+      * @param start If start is negative, it is treated as length+start. If end is negative, it
+      * is treated as length+end.
+      * @param end If not specified, length of the this object is used as its default value.
+      */
+    copyWithin(target: number, start: number, end?: number): this;
+
+    /**
+      * Determines whether all the members of an array satisfy the specified test.
+      * @param callbackfn A function that accepts up to three arguments. The every method calls
+      * the callbackfn function for each element in array1 until the callbackfn returns false,
+      * or until the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    every(callbackfn: (value: number, index: number, array: Int32Array) => boolean, thisArg?: any): boolean;
+
+    /**
+        * Returns the this object after filling the section identified by start and end with value
+        * @param value value to fill array section with
+        * @param start index to start filling the array at. If start is negative, it is treated as
+        * length+start where length is the length of the array.
+        * @param end index to stop filling the array at. If end is negative, it is treated as
+        * length+end.
+        */
+    fill(value: number, start?: number, end?: number): this;
+
+    /**
+      * Returns the elements of an array that meet the condition specified in a callback function.
+      * @param callbackfn A function that accepts up to three arguments. The filter method calls
+      * the callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    filter(callbackfn: (value: number, index: number, array: Int32Array) => any, thisArg?: any): Int32Array;
+
+    /**
+      * Returns the value of the first element in the array where predicate is true, and undefined
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found, find
+      * immediately returns that element value. Otherwise, find returns undefined.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
+
+    /**
+      * Returns the index of the first element in the array where predicate is true, and -1
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found,
+      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
+
+    /**
+      * Performs the specified action for each element in an array.
+      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    forEach(callbackfn: (value: number, index: number, array: Int32Array) => void, thisArg?: any): void;
+
+    /**
+      * Returns the index of the first occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      *  search starts at index 0.
+      */
+    indexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * Adds all the elements of an array separated by the specified separator string.
+      * @param separator A string used to separate one element of an array from the next in the
+      * resulting String. If omitted, the array elements are separated with a comma.
+      */
+    join(separator?: string): string;
+
+    /**
+      * Returns the index of the last occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      * search starts at index 0.
+      */
+    lastIndexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * The length of the array.
+      */
+    readonly length: number;
+
+    /**
+      * Calls a defined callback function on each element of an array, and returns an array that
+      * contains the results.
+      * @param callbackfn A function that accepts up to three arguments. The map method calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    map(callbackfn: (value: number, index: number, array: Int32Array) => number, thisArg?: any): Int32Array;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Int32Array) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Int32Array) => U, initialValue: U): U;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an
+      * argument instead of an array value.
+      */
+    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Int32Array) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Int32Array) => U, initialValue: U): U;
+
+    /**
+      * Reverses the elements in an Array.
+      */
+    reverse(): Int32Array;
+
+    /**
+      * Sets a value or an array of values.
+      * @param array A typed or untyped array of values to set.
+      * @param offset The index in the current array at which the values are to be written.
+      */
+    set(array: ArrayLike<number>, offset?: number): void;
+
+    /**
+      * Returns a section of an array.
+      * @param start The beginning of the specified portion of the array.
+      * @param end The end of the specified portion of the array.
+      */
+    slice(start?: number, end?: number): Int32Array;
+
+    /**
+      * Determines whether the specified callback function returns true for any element of an array.
+      * @param callbackfn A function that accepts up to three arguments. The some method calls the
+      * callbackfn function for each element in array1 until the callbackfn returns true, or until
+      * the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    some(callbackfn: (value: number, index: number, array: Int32Array) => boolean, thisArg?: any): boolean;
+
+    /**
+      * Sorts an array.
+      * @param compareFn The name of the function used to determine the order of the elements. If
+      * omitted, the elements are sorted in ascending, ASCII character order.
+      */
+    sort(compareFn?: (a: number, b: number) => number): this;
+
+    /**
+      * Gets a new Int32Array view of the ArrayBuffer store for this array, referencing the elements
+      * at begin, inclusive, up to end, exclusive.
+      * @param begin The index of the beginning of the array.
+      * @param end The index of the end of the array.
+      */
+    subarray(begin: number, end?: number): Int32Array;
+
+    /**
+      * Converts a number to a string by using the current locale.
+      */
+    toLocaleString(): string;
+
+    /**
+      * Returns a string representation of an array.
+      */
+    toString(): string;
+
+    [index: number]: number;
+}
+
+interface Int32ArrayConstructor {
+    readonly prototype: Int32Array;
+    new(length: number): Int32Array;
+    new(array: ArrayLike<number>): Int32Array;
+    new(buffer: ArrayBufferLike, byteOffset?: number, length?: number): Int32Array;
+
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * Returns a new array from a set of elements.
+      * @param items A set of elements to include in the new array object.
+      */
+    of(...items: number[]): Int32Array;
+
+    /**
+      * Creates an array from an array-like or iterable object.
+      * @param arrayLike An array-like or iterable object to convert to an array.
+      * @param mapfn A mapping function to call on every element of the array.
+      * @param thisArg Value of 'this' used to invoke the mapfn.
+      */
+    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Int32Array;
+
+}
+declare const Int32Array: Int32ArrayConstructor;
+
+/**
+  * A typed array of 32-bit unsigned integer values. The contents are initialized to 0. If the
+  * requested number of bytes could not be allocated an exception is raised.
+  */
+interface Uint32Array {
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * The ArrayBuffer instance referenced by the array.
+      */
+    readonly buffer: ArrayBufferLike;
+
+    /**
+      * The length in bytes of the array.
+      */
+    readonly byteLength: number;
+
+    /**
+      * The offset in bytes of the array.
+      */
+    readonly byteOffset: number;
+
+    /**
+      * Returns the this object after copying a section of the array identified by start and end
+      * to the same array starting at position target
+      * @param target If target is negative, it is treated as length+target where length is the
+      * length of the array.
+      * @param start If start is negative, it is treated as length+start. If end is negative, it
+      * is treated as length+end.
+      * @param end If not specified, length of the this object is used as its default value.
+      */
+    copyWithin(target: number, start: number, end?: number): this;
+
+    /**
+      * Determines whether all the members of an array satisfy the specified test.
+      * @param callbackfn A function that accepts up to three arguments. The every method calls
+      * the callbackfn function for each element in array1 until the callbackfn returns false,
+      * or until the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    every(callbackfn: (value: number, index: number, array: Uint32Array) => boolean, thisArg?: any): boolean;
+
+    /**
+        * Returns the this object after filling the section identified by start and end with value
+        * @param value value to fill array section with
+        * @param start index to start filling the array at. If start is negative, it is treated as
+        * length+start where length is the length of the array.
+        * @param end index to stop filling the array at. If end is negative, it is treated as
+        * length+end.
+        */
+    fill(value: number, start?: number, end?: number): this;
+
+    /**
+      * Returns the elements of an array that meet the condition specified in a callback function.
+      * @param callbackfn A function that accepts up to three arguments. The filter method calls
+      * the callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    filter(callbackfn: (value: number, index: number, array: Uint32Array) => any, thisArg?: any): Uint32Array;
+
+    /**
+      * Returns the value of the first element in the array where predicate is true, and undefined
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found, find
+      * immediately returns that element value. Otherwise, find returns undefined.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
+
+    /**
+      * Returns the index of the first element in the array where predicate is true, and -1
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found,
+      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
+
+    /**
+      * Performs the specified action for each element in an array.
+      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    forEach(callbackfn: (value: number, index: number, array: Uint32Array) => void, thisArg?: any): void;
+    /**
+      * Returns the index of the first occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      *  search starts at index 0.
+      */
+    indexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * Adds all the elements of an array separated by the specified separator string.
+      * @param separator A string used to separate one element of an array from the next in the
+      * resulting String. If omitted, the array elements are separated with a comma.
+      */
+    join(separator?: string): string;
+
+    /**
+      * Returns the index of the last occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      * search starts at index 0.
+      */
+    lastIndexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * The length of the array.
+      */
+    readonly length: number;
+
+    /**
+      * Calls a defined callback function on each element of an array, and returns an array that
+      * contains the results.
+      * @param callbackfn A function that accepts up to three arguments. The map method calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    map(callbackfn: (this: void, value: number, index: number, array: Uint32Array) => number, thisArg?: any): Uint32Array;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Uint32Array) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Uint32Array) => U, initialValue: U): U;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an
+      * argument instead of an array value.
+      */
+    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Uint32Array) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Uint32Array) => U, initialValue: U): U;
+
+    /**
+      * Reverses the elements in an Array.
+      */
+    reverse(): Uint32Array;
+
+    /**
+      * Sets a value or an array of values.
+      * @param array A typed or untyped array of values to set.
+      * @param offset The index in the current array at which the values are to be written.
+      */
+    set(array: ArrayLike<number>, offset?: number): void;
+
+    /**
+      * Returns a section of an array.
+      * @param start The beginning of the specified portion of the array.
+      * @param end The end of the specified portion of the array.
+      */
+    slice(start?: number, end?: number): Uint32Array;
+
+    /**
+      * Determines whether the specified callback function returns true for any element of an array.
+      * @param callbackfn A function that accepts up to three arguments. The some method calls the
+      * callbackfn function for each element in array1 until the callbackfn returns true, or until
+      * the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    some(callbackfn: (value: number, index: number, array: Uint32Array) => boolean, thisArg?: any): boolean;
+
+    /**
+      * Sorts an array.
+      * @param compareFn The name of the function used to determine the order of the elements. If
+      * omitted, the elements are sorted in ascending, ASCII character order.
+      */
+    sort(compareFn?: (a: number, b: number) => number): this;
+
+    /**
+      * Gets a new Uint32Array view of the ArrayBuffer store for this array, referencing the elements
+      * at begin, inclusive, up to end, exclusive.
+      * @param begin The index of the beginning of the array.
+      * @param end The index of the end of the array.
+      */
+    subarray(begin: number, end?: number): Uint32Array;
+
+    /**
+      * Converts a number to a string by using the current locale.
+      */
+    toLocaleString(): string;
+
+    /**
+      * Returns a string representation of an array.
+      */
+    toString(): string;
+
+    [index: number]: number;
+}
+
+interface Uint32ArrayConstructor {
+    readonly prototype: Uint32Array;
+    new(length: number): Uint32Array;
+    new(array: ArrayLike<number>): Uint32Array;
+    new(buffer: ArrayBufferLike, byteOffset?: number, length?: number): Uint32Array;
+
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * Returns a new array from a set of elements.
+      * @param items A set of elements to include in the new array object.
+      */
+    of(...items: number[]): Uint32Array;
+
+    /**
+      * Creates an array from an array-like or iterable object.
+      * @param arrayLike An array-like or iterable object to convert to an array.
+      * @param mapfn A mapping function to call on every element of the array.
+      * @param thisArg Value of 'this' used to invoke the mapfn.
+      */
+    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Uint32Array;
+
+}
+declare const Uint32Array: Uint32ArrayConstructor;
+
+/**
+  * A typed array of 32-bit float values. The contents are initialized to 0. If the requested number
+  * of bytes could not be allocated an exception is raised.
+  */
+interface Float32Array {
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * The ArrayBuffer instance referenced by the array.
+      */
+    readonly buffer: ArrayBufferLike;
+
+    /**
+      * The length in bytes of the array.
+      */
+    readonly byteLength: number;
+
+    /**
+      * The offset in bytes of the array.
+      */
+    readonly byteOffset: number;
+
+    /**
+      * Returns the this object after copying a section of the array identified by start and end
+      * to the same array starting at position target
+      * @param target If target is negative, it is treated as length+target where length is the
+      * length of the array.
+      * @param start If start is negative, it is treated as length+start. If end is negative, it
+      * is treated as length+end.
+      * @param end If not specified, length of the this object is used as its default value.
+      */
+    copyWithin(target: number, start: number, end?: number): this;
+
+    /**
+      * Determines whether all the members of an array satisfy the specified test.
+      * @param callbackfn A function that accepts up to three arguments. The every method calls
+      * the callbackfn function for each element in array1 until the callbackfn returns false,
+      * or until the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    every(callbackfn: (value: number, index: number, array: Float32Array) => boolean, thisArg?: any): boolean;
+
+    /**
+        * Returns the this object after filling the section identified by start and end with value
+        * @param value value to fill array section with
+        * @param start index to start filling the array at. If start is negative, it is treated as
+        * length+start where length is the length of the array.
+        * @param end index to stop filling the array at. If end is negative, it is treated as
+        * length+end.
+        */
+    fill(value: number, start?: number, end?: number): this;
+
+    /**
+      * Returns the elements of an array that meet the condition specified in a callback function.
+      * @param callbackfn A function that accepts up to three arguments. The filter method calls
+      * the callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    filter(callbackfn: (value: number, index: number, array: Float32Array) => any, thisArg?: any): Float32Array;
+
+    /**
+      * Returns the value of the first element in the array where predicate is true, and undefined
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found, find
+      * immediately returns that element value. Otherwise, find returns undefined.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
+
+    /**
+      * Returns the index of the first element in the array where predicate is true, and -1
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found,
+      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
+
+    /**
+      * Performs the specified action for each element in an array.
+      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    forEach(callbackfn: (value: number, index: number, array: Float32Array) => void, thisArg?: any): void;
+
+    /**
+      * Returns the index of the first occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      *  search starts at index 0.
+      */
+    indexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * Adds all the elements of an array separated by the specified separator string.
+      * @param separator A string used to separate one element of an array from the next in the
+      * resulting String. If omitted, the array elements are separated with a comma.
+      */
+    join(separator?: string): string;
+
+    /**
+      * Returns the index of the last occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      * search starts at index 0.
+      */
+    lastIndexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * The length of the array.
+      */
+    readonly length: number;
+
+    /**
+      * Calls a defined callback function on each element of an array, and returns an array that
+      * contains the results.
+      * @param callbackfn A function that accepts up to three arguments. The map method calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    map(callbackfn: (this: void, value: number, index: number, array: Float32Array) => number, thisArg?: any): Float32Array;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Float32Array) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Float32Array) => U, initialValue: U): U;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an
+      * argument instead of an array value.
+      */
+    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Float32Array) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Float32Array) => U, initialValue: U): U;
+
+    /**
+      * Reverses the elements in an Array.
+      */
+    reverse(): Float32Array;
+
+    /**
+      * Sets a value or an array of values.
+      * @param array A typed or untyped array of values to set.
+      * @param offset The index in the current array at which the values are to be written.
+      */
+    set(array: ArrayLike<number>, offset?: number): void;
+
+    /**
+      * Returns a section of an array.
+      * @param start The beginning of the specified portion of the array.
+      * @param end The end of the specified portion of the array.
+      */
+    slice(start?: number, end?: number): Float32Array;
+
+    /**
+      * Determines whether the specified callback function returns true for any element of an array.
+      * @param callbackfn A function that accepts up to three arguments. The some method calls the
+      * callbackfn function for each element in array1 until the callbackfn returns true, or until
+      * the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    some(callbackfn: (value: number, index: number, array: Float32Array) => boolean, thisArg?: any): boolean;
+
+    /**
+      * Sorts an array.
+      * @param compareFn The name of the function used to determine the order of the elements. If
+      * omitted, the elements are sorted in ascending, ASCII character order.
+      */
+    sort(compareFn?: (a: number, b: number) => number): this;
+
+    /**
+      * Gets a new Float32Array view of the ArrayBuffer store for this array, referencing the elements
+      * at begin, inclusive, up to end, exclusive.
+      * @param begin The index of the beginning of the array.
+      * @param end The index of the end of the array.
+      */
+    subarray(begin: number, end?: number): Float32Array;
+
+    /**
+      * Converts a number to a string by using the current locale.
+      */
+    toLocaleString(): string;
+
+    /**
+      * Returns a string representation of an array.
+      */
+    toString(): string;
+
+    [index: number]: number;
+}
+
+interface Float32ArrayConstructor {
+    readonly prototype: Float32Array;
+    new(length: number): Float32Array;
+    new(array: ArrayLike<number>): Float32Array;
+    new(buffer: ArrayBufferLike, byteOffset?: number, length?: number): Float32Array;
+
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * Returns a new array from a set of elements.
+      * @param items A set of elements to include in the new array object.
+      */
+    of(...items: number[]): Float32Array;
+
+    /**
+      * Creates an array from an array-like or iterable object.
+      * @param arrayLike An array-like or iterable object to convert to an array.
+      * @param mapfn A mapping function to call on every element of the array.
+      * @param thisArg Value of 'this' used to invoke the mapfn.
+      */
+    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Float32Array;
+
+
+}
+declare const Float32Array: Float32ArrayConstructor;
+
+/**
+  * A typed array of 64-bit float values. The contents are initialized to 0. If the requested
+  * number of bytes could not be allocated an exception is raised.
+  */
+interface Float64Array {
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * The ArrayBuffer instance referenced by the array.
+      */
+    readonly buffer: ArrayBufferLike;
+
+    /**
+      * The length in bytes of the array.
+      */
+    readonly byteLength: number;
+
+    /**
+      * The offset in bytes of the array.
+      */
+    readonly byteOffset: number;
+
+    /**
+      * Returns the this object after copying a section of the array identified by start and end
+      * to the same array starting at position target
+      * @param target If target is negative, it is treated as length+target where length is the
+      * length of the array.
+      * @param start If start is negative, it is treated as length+start. If end is negative, it
+      * is treated as length+end.
+      * @param end If not specified, length of the this object is used as its default value.
+      */
+    copyWithin(target: number, start: number, end?: number): this;
+
+    /**
+      * Determines whether all the members of an array satisfy the specified test.
+      * @param callbackfn A function that accepts up to three arguments. The every method calls
+      * the callbackfn function for each element in array1 until the callbackfn returns false,
+      * or until the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    every(callbackfn: (value: number, index: number, array: Float64Array) => boolean, thisArg?: any): boolean;
+
+    /**
+        * Returns the this object after filling the section identified by start and end with value
+        * @param value value to fill array section with
+        * @param start index to start filling the array at. If start is negative, it is treated as
+        * length+start where length is the length of the array.
+        * @param end index to stop filling the array at. If end is negative, it is treated as
+        * length+end.
+        */
+    fill(value: number, start?: number, end?: number): this;
+
+    /**
+      * Returns the elements of an array that meet the condition specified in a callback function.
+      * @param callbackfn A function that accepts up to three arguments. The filter method calls
+      * the callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    filter(callbackfn: (value: number, index: number, array: Float64Array) => any, thisArg?: any): Float64Array;
+
+    /**
+      * Returns the value of the first element in the array where predicate is true, and undefined
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found, find
+      * immediately returns that element value. Otherwise, find returns undefined.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    find(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number | undefined;
+
+    /**
+      * Returns the index of the first element in the array where predicate is true, and -1
+      * otherwise.
+      * @param predicate find calls predicate once for each element of the array, in ascending
+      * order, until it finds one where predicate returns true. If such an element is found,
+      * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
+      * @param thisArg If provided, it will be used as the this value for each invocation of
+      * predicate. If it is not provided, undefined is used instead.
+      */
+    findIndex(predicate: (value: number, index: number, obj: Array<number>) => boolean, thisArg?: any): number;
+
+    /**
+      * Performs the specified action for each element in an array.
+      * @param callbackfn  A function that accepts up to three arguments. forEach calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg  An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    forEach(callbackfn: (value: number, index: number, array: Float64Array) => void, thisArg?: any): void;
+
+    /**
+      * Returns the index of the first occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      *  search starts at index 0.
+      */
+    indexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * Adds all the elements of an array separated by the specified separator string.
+      * @param separator A string used to separate one element of an array from the next in the
+      * resulting String. If omitted, the array elements are separated with a comma.
+      */
+    join(separator?: string): string;
+
+    /**
+      * Returns the index of the last occurrence of a value in an array.
+      * @param searchElement The value to locate in the array.
+      * @param fromIndex The array index at which to begin the search. If fromIndex is omitted, the
+      * search starts at index 0.
+      */
+    lastIndexOf(searchElement: number, fromIndex?: number): number;
+
+    /**
+      * The length of the array.
+      */
+    readonly length: number;
+
+    /**
+      * Calls a defined callback function on each element of an array, and returns an array that
+      * contains the results.
+      * @param callbackfn A function that accepts up to three arguments. The map method calls the
+      * callbackfn function one time for each element in the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    map(callbackfn: (this: void, value: number, index: number, array: Float64Array) => number, thisArg?: any): Float64Array;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Float64Array) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array. The return value of
+      * the callback function is the accumulated result, and is provided as an argument in the next
+      * call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduce method calls the
+      * callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduce<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Float64Array) => U, initialValue: U): U;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an
+      * argument instead of an array value.
+      */
+    reduceRight(callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Float64Array) => number, initialValue?: number): number;
+
+    /**
+      * Calls the specified callback function for all the elements in an array, in descending order.
+      * The return value of the callback function is the accumulated result, and is provided as an
+      * argument in the next call to the callback function.
+      * @param callbackfn A function that accepts up to four arguments. The reduceRight method calls
+      * the callbackfn function one time for each element in the array.
+      * @param initialValue If initialValue is specified, it is used as the initial value to start
+      * the accumulation. The first call to the callbackfn function provides this value as an argument
+      * instead of an array value.
+      */
+    reduceRight<U>(callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Float64Array) => U, initialValue: U): U;
+
+    /**
+      * Reverses the elements in an Array.
+      */
+    reverse(): Float64Array;
+
+    /**
+      * Sets a value or an array of values.
+      * @param array A typed or untyped array of values to set.
+      * @param offset The index in the current array at which the values are to be written.
+      */
+    set(array: ArrayLike<number>, offset?: number): void;
+
+    /**
+      * Returns a section of an array.
+      * @param start The beginning of the specified portion of the array.
+      * @param end The end of the specified portion of the array.
+      */
+    slice(start?: number, end?: number): Float64Array;
+
+    /**
+      * Determines whether the specified callback function returns true for any element of an array.
+      * @param callbackfn A function that accepts up to three arguments. The some method calls the
+      * callbackfn function for each element in array1 until the callbackfn returns true, or until
+      * the end of the array.
+      * @param thisArg An object to which the this keyword can refer in the callbackfn function.
+      * If thisArg is omitted, undefined is used as the this value.
+      */
+    some(callbackfn: (value: number, index: number, array: Float64Array) => boolean, thisArg?: any): boolean;
+
+    /**
+      * Sorts an array.
+      * @param compareFn The name of the function used to determine the order of the elements. If
+      * omitted, the elements are sorted in ascending, ASCII character order.
+      */
+    sort(compareFn?: (a: number, b: number) => number): this;
+
+    /**
+      * Gets a new Float64Array view of the ArrayBuffer store for this array, referencing the elements
+      * at begin, inclusive, up to end, exclusive.
+      * @param begin The index of the beginning of the array.
+      * @param end The index of the end of the array.
+      */
+    subarray(begin: number, end?: number): Float64Array;
+
+    /**
+      * Converts a number to a string by using the current locale.
+      */
+    toLocaleString(): string;
+
+    /**
+      * Returns a string representation of an array.
+      */
+    toString(): string;
+
+    [index: number]: number;
+}
+
+interface Float64ArrayConstructor {
+    readonly prototype: Float64Array;
+    new(length: number): Float64Array;
+    new(array: ArrayLike<number>): Float64Array;
+    new(buffer: ArrayBufferLike, byteOffset?: number, length?: number): Float64Array;
+
+    /**
+      * The size in bytes of each element in the array.
+      */
+    readonly BYTES_PER_ELEMENT: number;
+
+    /**
+      * Returns a new array from a set of elements.
+      * @param items A set of elements to include in the new array object.
+      */
+    of(...items: number[]): Float64Array;
+
+    /**
+      * Creates an array from an array-like or iterable object.
+      * @param arrayLike An array-like or iterable object to convert to an array.
+      * @param mapfn A mapping function to call on every element of the array.
+      * @param thisArg Value of 'this' used to invoke the mapfn.
+      */
+    from(arrayLike: ArrayLike<number>, mapfn?: (v: number, k: number) => number, thisArg?: any): Float64Array;
+
+}
+declare const Float64Array: Float64ArrayConstructor;
+
+/////////////////////////////
+/// ECMAScript Internationalization API
+/////////////////////////////
+
+declare namespace Intl {
+    interface CollatorOptions {
+        usage?: string;
+        localeMatcher?: string;
+        numeric?: boolean;
+        caseFirst?: string;
+        sensitivity?: string;
+        ignorePunctuation?: boolean;
+    }
+
+    interface ResolvedCollatorOptions {
+        locale: string;
+        usage: string;
+        sensitivity: string;
+        ignorePunctuation: boolean;
+        collation: string;
+        caseFirst: string;
+        numeric: boolean;
+    }
+
+    interface Collator {
+        compare(x: string, y: string): number;
+        resolvedOptions(): ResolvedCollatorOptions;
+    }
+    var Collator: {
+        new(locales?: string | string[], options?: CollatorOptions): Collator;
+        (locales?: string | string[], options?: CollatorOptions): Collator;
+        supportedLocalesOf(locales: string | string[], options?: CollatorOptions): string[];
+    };
+
+    interface NumberFormatOptions {
+        localeMatcher?: string;
+        style?: string;
+        currency?: string;
+        currencyDisplay?: string;
+        useGrouping?: boolean;
+        minimumIntegerDigits?: number;
+        minimumFractionDigits?: number;
+        maximumFractionDigits?: number;
+        minimumSignificantDigits?: number;
+        maximumSignificantDigits?: number;
+    }
+
+    interface ResolvedNumberFormatOptions {
+        locale: string;
+        numberingSystem: string;
+        style: string;
+        currency?: string;
+        currencyDisplay?: string;
+        minimumIntegerDigits: number;
+        minimumFractionDigits: number;
+        maximumFractionDigits: number;
+        minimumSignificantDigits?: number;
+        maximumSignificantDigits?: number;
+        useGrouping: boolean;
+    }
+
+    interface NumberFormat {
+        format(value: number): string;
+        resolvedOptions(): ResolvedNumberFormatOptions;
+    }
+    var NumberFormat: {
+        new(locales?: string | string[], options?: NumberFormatOptions): NumberFormat;
+        (locales?: string | string[], options?: NumberFormatOptions): NumberFormat;
+        supportedLocalesOf(locales: string | string[], options?: NumberFormatOptions): string[];
+    };
+
+    interface DateTimeFormatOptions {
+        localeMatcher?: string;
+        weekday?: string;
+        era?: string;
+        year?: string;
+        month?: string;
+        day?: string;
+        hour?: string;
+        minute?: string;
+        second?: string;
+        timeZoneName?: string;
+        formatMatcher?: string;
+        hour12?: boolean;
+        timeZone?: string;
+    }
+
+    interface ResolvedDateTimeFormatOptions {
+        locale: string;
+        calendar: string;
+        numberingSystem: string;
+        timeZone: string;
+        hour12?: boolean;
+        weekday?: string;
+        era?: string;
+        year?: string;
+        month?: string;
+        day?: string;
+        hour?: string;
+        minute?: string;
+        second?: string;
+        timeZoneName?: string;
+    }
+
+    interface DateTimeFormat {
+        format(date?: Date | number): string;
+        resolvedOptions(): ResolvedDateTimeFormatOptions;
+    }
+    var DateTimeFormat: {
+        new(locales?: string | string[], options?: DateTimeFormatOptions): DateTimeFormat;
+        (locales?: string | string[], options?: DateTimeFormatOptions): DateTimeFormat;
+        supportedLocalesOf(locales: string | string[], options?: DateTimeFormatOptions): string[];
+    };
+}
+
+interface String {
+    /**
+      * Determines whether two strings are equivalent in the current or specified locale.
+      * @param that String to compare to target string
+      * @param locales A locale string or array of locale strings that contain one or more language or locale tags. If you include more than one locale string, list them in descending order of priority so that the first entry is the preferred locale. If you omit this parameter, the default locale of the JavaScript runtime is used. This parameter must conform to BCP 47 standards; see the Intl.Collator object for details.
+      * @param options An object that contains one or more properties that specify comparison options. see the Intl.Collator object for details.
+      */
+    localeCompare(that: string, locales?: string | string[], options?: Intl.CollatorOptions): number;
+}
+
+interface Number {
+    /**
+      * Converts a number to a string by using the current or specified locale.
+      * @param locales A locale string or array of locale strings that contain one or more language or locale tags. If you include more than one locale string, list them in descending order of priority so that the first entry is the preferred locale. If you omit this parameter, the default locale of the JavaScript runtime is used.
+      * @param options An object that contains one or more properties that specify comparison options.
+      */
+    toLocaleString(locales?: string | string[], options?: Intl.NumberFormatOptions): string;
+}
+
+interface Date {
+    /**
+      * Converts a date and time to a string by using the current or specified locale.
+      * @param locales A locale string or array of locale strings that contain one or more language or locale tags. If you include more than one locale string, list them in descending order of priority so that the first entry is the preferred locale. If you omit this parameter, the default locale of the JavaScript runtime is used.
+      * @param options An object that contains one or more properties that specify comparison options.
+      */
+    toLocaleString(locales?: string | string[], options?: Intl.DateTimeFormatOptions): string;
+    /**
+      * Converts a date to a string by using the current or specified locale.
+      * @param locales A locale string or array of locale strings that contain one or more language or locale tags. If you include more than one locale string, list them in descending order of priority so that the first entry is the preferred locale. If you omit this parameter, the default locale of the JavaScript runtime is used.
+      * @param options An object that contains one or more properties that specify comparison options.
+      */
+    toLocaleDateString(locales?: string | string[], options?: Intl.DateTimeFormatOptions): string;
+
+    /**
+      * Converts a time to a string by using the current or specified locale.
+      * @param locales A locale string or array of locale strings that contain one or more language or locale tags. If you include more than one locale string, list them in descending order of priority so that the first entry is the preferred locale. If you omit this parameter, the default locale of the JavaScript runtime is used.
+      * @param options An object that contains one or more properties that specify comparison options.
+      */
+    toLocaleTimeString(locales?: string | string[], options?: Intl.DateTimeFormatOptions): string;
+}
+
+
+declare type PropertyKey = string | number | symbol;
+
+interface Array<T> {
+    /**
+     * Returns the value of the first element in the array where predicate is true, and undefined
+     * otherwise.
+     * @param predicate find calls predicate once for each element of the array, in ascending
+     * order, until it finds one where predicate returns true. If such an element is found, find
+     * immediately returns that element value. Otherwise, find returns undefined.
+     * @param thisArg If provided, it will be used as the this value for each invocation of
+     * predicate. If it is not provided, undefined is used instead.
+     */
+    find(predicate: (this: void, value: T, index: number, obj: Array<T>) => boolean): T | undefined;
+    find(predicate: (this: void, value: T, index: number, obj: Array<T>) => boolean, thisArg: undefined): T | undefined;
+    find<Z>(predicate: (this: Z, value: T, index: number, obj: Array<T>) => boolean, thisArg: Z): T | undefined;
+
+    /**
+     * Returns the index of the first element in the array where predicate is true, and -1
+     * otherwise.
+     * @param predicate find calls predicate once for each element of the array, in ascending
+     * order, until it finds one where predicate returns true. If such an element is found,
+     * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
+     * @param thisArg If provided, it will be used as the this value for each invocation of
+     * predicate. If it is not provided, undefined is used instead.
+     */
+    findIndex(predicate: (this: void, value: T, index: number, obj: Array<T>) => boolean): number;
+    findIndex(predicate: (this: void, value: T, index: number, obj: Array<T>) => boolean, thisArg: undefined): number;
+    findIndex<Z>(predicate: (this: Z, value: T, index: number, obj: Array<T>) => boolean, thisArg: Z): number;
+
+    /**
+     * Returns the this object after filling the section identified by start and end with value
+     * @param value value to fill array section with
+     * @param start index to start filling the array at. If start is negative, it is treated as
+     * length+start where length is the length of the array.
+     * @param end index to stop filling the array at. If end is negative, it is treated as
+     * length+end.
+     */
+    fill(value: T, start?: number, end?: number): this;
+
+    /**
+     * Returns the this object after copying a section of the array identified by start and end
+     * to the same array starting at position target
+     * @param target If target is negative, it is treated as length+target where length is the
+     * length of the array.
+     * @param start If start is negative, it is treated as length+start. If end is negative, it
+     * is treated as length+end.
+     * @param end If not specified, length of the this object is used as its default value.
+     */
+    copyWithin(target: number, start: number, end?: number): this;
+}
+
+interface ArrayConstructor {
+    /**
+     * Creates an array from an array-like object.
+     * @param arrayLike An array-like object to convert to an array.
+     * @param mapfn A mapping function to call on every element of the array.
+     * @param thisArg Value of 'this' used to invoke the mapfn.
+     */
+    from<T, U>(arrayLike: ArrayLike<T>, mapfn: (this: void, v: T, k: number) => U): Array<U>;
+    from<T, U>(arrayLike: ArrayLike<T>, mapfn: (this: void, v: T, k: number) => U, thisArg: undefined): Array<U>;
+    from<Z, T, U>(arrayLike: ArrayLike<T>, mapfn: (this: Z, v: T, k: number) => U, thisArg: Z): Array<U>;
+
+
+    /**
+     * Creates an array from an array-like object.
+     * @param arrayLike An array-like object to convert to an array.
+     */
+    from<T>(arrayLike: ArrayLike<T>): Array<T>;
+
+    /**
+     * Returns a new array from a set of elements.
+     * @param items A set of elements to include in the new array object.
+     */
+    of<T>(...items: T[]): Array<T>;
+}
+
+interface DateConstructor {
+    new (value: Date): Date;
+}
+
+interface Function {
+    /**
+     * Returns the name of the function. Function names are read-only and can not be changed.
+     */
+    readonly name: string;
+}
+
+interface Math {
+    /**
+     * Returns the number of leading zero bits in the 32-bit binary representation of a number.
+     * @param x A numeric expression.
+     */
+    clz32(x: number): number;
+
+    /**
+     * Returns the result of 32-bit multiplication of two numbers.
+     * @param x First number
+     * @param y Second number
+     */
+    imul(x: number, y: number): number;
+
+    /**
+     * Returns the sign of the x, indicating whether x is positive, negative or zero.
+     * @param x The numeric expression to test
+     */
+    sign(x: number): number;
+
+    /**
+     * Returns the base 10 logarithm of a number.
+     * @param x A numeric expression.
+     */
+    log10(x: number): number;
+
+    /**
+     * Returns the base 2 logarithm of a number.
+     * @param x A numeric expression.
+     */
+    log2(x: number): number;
+
+    /**
+     * Returns the natural logarithm of 1 + x.
+     * @param x A numeric expression.
+     */
+    log1p(x: number): number;
+
+    /**
+     * Returns the result of (e^x - 1) of x (e raised to the power of x, where e is the base of
+     * the natural logarithms).
+     * @param x A numeric expression.
+     */
+    expm1(x: number): number;
+
+    /**
+     * Returns the hyperbolic cosine of a number.
+     * @param x A numeric expression that contains an angle measured in radians.
+     */
+    cosh(x: number): number;
+
+    /**
+     * Returns the hyperbolic sine of a number.
+     * @param x A numeric expression that contains an angle measured in radians.
+     */
+    sinh(x: number): number;
+
+    /**
+     * Returns the hyperbolic tangent of a number.
+     * @param x A numeric expression that contains an angle measured in radians.
+     */
+    tanh(x: number): number;
+
+    /**
+     * Returns the inverse hyperbolic cosine of a number.
+     * @param x A numeric expression that contains an angle measured in radians.
+     */
+    acosh(x: number): number;
+
+    /**
+     * Returns the inverse hyperbolic sine of a number.
+     * @param x A numeric expression that contains an angle measured in radians.
+     */
+    asinh(x: number): number;
+
+    /**
+     * Returns the inverse hyperbolic tangent of a number.
+     * @param x A numeric expression that contains an angle measured in radians.
+     */
+    atanh(x: number): number;
+
+    /**
+     * Returns the square root of the sum of squares of its arguments.
+     * @param values Values to compute the square root for.
+     *     If no arguments are passed, the result is +0.
+     *     If there is only one argument, the result is the absolute value.
+     *     If any argument is +Infinity or -Infinity, the result is +Infinity.
+     *     If any argument is NaN, the result is NaN.
+     *     If all arguments are either +0 or −0, the result is +0.
+     */
+    hypot(...values: number[] ): number;
+
+    /**
+     * Returns the integral part of the a numeric expression, x, removing any fractional digits.
+     * If x is already an integer, the result is x.
+     * @param x A numeric expression.
+     */
+    trunc(x: number): number;
+
+    /**
+     * Returns the nearest single precision float representation of a number.
+     * @param x A numeric expression.
+     */
+    fround(x: number): number;
+
+    /**
+     * Returns an implementation-dependent approximation to the cube root of number.
+     * @param x A numeric expression.
+     */
+    cbrt(x: number): number;
+}
+
+interface NumberConstructor {
+    /**
+     * The value of Number.EPSILON is the difference between 1 and the smallest value greater than 1
+     * that is representable as a Number value, which is approximately:
+     * 2.2204460492503130808472633361816 x 10‍−‍16.
+     */
+    readonly EPSILON: number;
+
+    /**
+     * Returns true if passed value is finite.
+     * Unlike the global isFinite, Number.isFinite doesn't forcibly convert the parameter to a
+     * number. Only finite values of the type number, result in true.
+     * @param number A numeric value.
+     */
+    isFinite(number: number): boolean;
+
+    /**
+     * Returns true if the value passed is an integer, false otherwise.
+     * @param number A numeric value.
+     */
+    isInteger(number: number): boolean;
+
+    /**
+     * Returns a Boolean value that indicates whether a value is the reserved value NaN (not a
+     * number). Unlike the global isNaN(), Number.isNaN() doesn't forcefully convert the parameter
+     * to a number. Only values of the type number, that are also NaN, result in true.
+     * @param number A numeric value.
+     */
+    isNaN(number: number): boolean;
+
+    /**
+     * Returns true if the value passed is a safe integer.
+     * @param number A numeric value.
+     */
+    isSafeInteger(number: number): boolean;
+
+    /**
+     * The value of the largest integer n such that n and n + 1 are both exactly representable as
+     * a Number value.
+     * The value of Number.MAX_SAFE_INTEGER is 9007199254740991 2^53 − 1.
+     */
+    readonly MAX_SAFE_INTEGER: number;
+
+    /**
+     * The value of the smallest integer n such that n and n − 1 are both exactly representable as
+     * a Number value.
+     * The value of Number.MIN_SAFE_INTEGER is −9007199254740991 (−(2^53 − 1)).
+     */
+    readonly MIN_SAFE_INTEGER: number;
+
+    /**
+     * Converts a string to a floating-point number.
+     * @param string A string that contains a floating-point number.
+     */
+    parseFloat(string: string): number;
+
+    /**
+     * Converts A string to an integer.
+     * @param s A string to convert into a number.
+     * @param radix A value between 2 and 36 that specifies the base of the number in numString.
+     * If this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.
+     * All other strings are considered decimal.
+     */
+    parseInt(string: string, radix?: number): number;
+}
+
+interface Object {
+    /**
+     * Determines whether an object has a property with the specified name.
+     * @param v A property name.
+     */
+    hasOwnProperty(v: PropertyKey): boolean;
+
+    /**
+     * Determines whether a specified property is enumerable.
+     * @param v A property name.
+     */
+    propertyIsEnumerable(v: PropertyKey): boolean;
+}
+
+interface ObjectConstructor {
+    /**
+     * Copy the values of all of the enumerable own properties from one or more source objects to a
+     * target object. Returns the target object.
+     * @param target The target object to copy to.
+     * @param source The source object from which to copy properties.
+     */
+    assign<T, U>(target: T, source: U): T & U;
+
+    /**
+     * Copy the values of all of the enumerable own properties from one or more source objects to a
+     * target object. Returns the target object.
+     * @param target The target object to copy to.
+     * @param source1 The first source object from which to copy properties.
+     * @param source2 The second source object from which to copy properties.
+     */
+    assign<T, U, V>(target: T, source1: U, source2: V): T & U & V;
+
+    /**
+     * Copy the values of all of the enumerable own properties from one or more source objects to a
+     * target object. Returns the target object.
+     * @param target The target object to copy to.
+     * @param source1 The first source object from which to copy properties.
+     * @param source2 The second source object from which to copy properties.
+     * @param source3 The third source object from which to copy properties.
+     */
+    assign<T, U, V, W>(target: T, source1: U, source2: V, source3: W): T & U & V & W;
+
+    /**
+     * Copy the values of all of the enumerable own properties from one or more source objects to a
+     * target object. Returns the target object.
+     * @param target The target object to copy to.
+     * @param sources One or more source objects from which to copy properties
+     */
+    assign(target: object, ...sources: any[]): any;
+
+    /**
+     * Returns an array of all symbol properties found directly on object o.
+     * @param o Object to retrieve the symbols from.
+     */
+    getOwnPropertySymbols(o: any): symbol[];
+
+    /**
+     * Returns true if the values are the same value, false otherwise.
+     * @param value1 The first value.
+     * @param value2 The second value.
+     */
+    is(value1: any, value2: any): boolean;
+
+    /**
+     * Sets the prototype of a specified object o to  object proto or null. Returns the object o.
+     * @param o The object to change its prototype.
+     * @param proto The value of the new prototype or null.
+     */
+    setPrototypeOf(o: any, proto: object | null): any;
+
+    /**
+     * Gets the own property descriptor of the specified object.
+     * An own property descriptor is one that is defined directly on the object and is not
+     * inherited from the object's prototype.
+     * @param o Object that contains the property.
+     * @param p Name of the property.
+     */
+    getOwnPropertyDescriptor(o: any, propertyKey: PropertyKey): PropertyDescriptor;
+
+    /**
+     * Adds a property to an object, or modifies attributes of an existing property.
+     * @param o Object on which to add or modify the property. This can be a native JavaScript
+     * object (that is, a user-defined object or a built in object) or a DOM object.
+     * @param p The property name.
+     * @param attributes Descriptor for the property. It can be for a data property or an accessor
+     *  property.
+     */
+    defineProperty(o: any, propertyKey: PropertyKey, attributes: PropertyDescriptor): any;
+}
+
+interface ReadonlyArray<T> {
+    /**
+     * Returns the value of the first element in the array where predicate is true, and undefined
+     * otherwise.
+     * @param predicate find calls predicate once for each element of the array, in ascending
+     * order, until it finds one where predicate returns true. If such an element is found, find
+     * immediately returns that element value. Otherwise, find returns undefined.
+     * @param thisArg If provided, it will be used as the this value for each invocation of
+     * predicate. If it is not provided, undefined is used instead.
+     */
+    find(predicate: (this: void, value: T, index: number, obj: ReadonlyArray<T>) => boolean): T | undefined;
+    find(predicate: (this: void, value: T, index: number, obj: ReadonlyArray<T>) => boolean, thisArg: undefined): T | undefined;
+    find<Z>(predicate: (this: Z, value: T, index: number, obj: ReadonlyArray<T>) => boolean, thisArg: Z): T | undefined;
+
+    /**
+     * Returns the index of the first element in the array where predicate is true, and -1
+     * otherwise.
+     * @param predicate find calls predicate once for each element of the array, in ascending
+     * order, until it finds one where predicate returns true. If such an element is found,
+     * findIndex immediately returns that element index. Otherwise, findIndex returns -1.
+     * @param thisArg If provided, it will be used as the this value for each invocation of
+     * predicate. If it is not provided, undefined is used instead.
+     */
+    findIndex(predicate: (this: void, value: T, index: number, obj: Array<T>) => boolean): number;
+    findIndex(predicate: (this: void, value: T, index: number, obj: Array<T>) => boolean, thisArg: undefined): number;
+    findIndex<Z>(predicate: (this: Z, value: T, index: number, obj: Array<T>) => boolean, thisArg: Z): number;
+}
+
+interface RegExp {
+    /**
+     * Returns a string indicating the flags of the regular expression in question. This field is read-only.
+     * The characters in this string are sequenced and concatenated in the following order:
+     *
+     *    - "g" for global
+     *    - "i" for ignoreCase
+     *    - "m" for multiline
+     *    - "u" for unicode
+     *    - "y" for sticky
+     *
+     * If no flags are set, the value is the empty string.
+     */
+    readonly flags: string;
+
+    /**
+     * Returns a Boolean value indicating the state of the sticky flag (y) used with a regular
+     * expression. Default is false. Read-only.
+     */
+    readonly sticky: boolean;
+
+    /**
+     * Returns a Boolean value indicating the state of the Unicode flag (u) used with a regular
+     * expression. Default is false. Read-only.
+     */
+    readonly unicode: boolean;
+}
+
+interface RegExpConstructor {
+    new (pattern: RegExp, flags?: string): RegExp;
+    (pattern: RegExp, flags?: string): RegExp;
+}
+
+interface String {
+    /**
+     * Returns a nonnegative integer Number less than 1114112 (0x110000) that is the code point
+     * value of the UTF-16 encoded code point starting at the string element at position pos in
+     * the String resulting from converting this object to a String.
+     * If there is no element at that position, the result is undefined.
+     * If a valid UTF-16 surrogate pair does not begin at pos, the result is the code unit at pos.
+     */
+    codePointAt(pos: number): number | undefined;
+
+    /**
+     * Returns true if searchString appears as a substring of the result of converting this
+     * object to a String, at one or more positions that are
+     * greater than or equal to position; otherwise, returns false.
+     * @param searchString search string
+     * @param position If position is undefined, 0 is assumed, so as to search all of the String.
+     */
+    includes(searchString: string, position?: number): boolean;
+
+    /**
+     * Returns true if the sequence of elements of searchString converted to a String is the
+     * same as the corresponding elements of this object (converted to a String) starting at
+     * endPosition – length(this). Otherwise returns false.
+     */
+    endsWith(searchString: string, endPosition?: number): boolean;
+
+    /**
+     * Returns the String value result of normalizing the string into the normalization form
+     * named by form as specified in Unicode Standard Annex #15, Unicode Normalization Forms.
+     * @param form Applicable values: "NFC", "NFD", "NFKC", or "NFKD", If not specified default
+     * is "NFC"
+     */
+    normalize(form: "NFC" | "NFD" | "NFKC" | "NFKD"): string;
+
+    /**
+     * Returns the String value result of normalizing the string into the normalization form
+     * named by form as specified in Unicode Standard Annex #15, Unicode Normalization Forms.
+     * @param form Applicable values: "NFC", "NFD", "NFKC", or "NFKD", If not specified default
+     * is "NFC"
+     */
+    normalize(form?: string): string;
+
+    /**
+     * Returns a String value that is made from count copies appended together. If count is 0,
+     * T is the empty String is returned.
+     * @param count number of copies to append
+     */
+    repeat(count: number): string;
+
+    /**
+     * Returns true if the sequence of elements of searchString converted to a String is the
+     * same as the corresponding elements of this object (converted to a String) starting at
+     * position. Otherwise returns false.
+     */
+    startsWith(searchString: string, position?: number): boolean;
+
+    /**
+     * Returns an <a> HTML anchor element and sets the name attribute to the text value
+     * @param name
+     */
+    anchor(name: string): string;
+
+    /** Returns a <big> HTML element */
+    big(): string;
+
+    /** Returns a <blink> HTML element */
+    blink(): string;
+
+    /** Returns a <b> HTML element */
+    bold(): string;
+
+    /** Returns a <tt> HTML element */
+    fixed(): string;
+
+    /** Returns a <font> HTML element and sets the color attribute value */
+    fontcolor(color: string): string;
+
+    /** Returns a <font> HTML element and sets the size attribute value */
+    fontsize(size: number): string;
+
+    /** Returns a <font> HTML element and sets the size attribute value */
+    fontsize(size: string): string;
+
+    /** Returns an <i> HTML element */
+    italics(): string;
+
+    /** Returns an <a> HTML element and sets the href attribute value */
+    link(url: string): string;
+
+    /** Returns a <small> HTML element */
+    small(): string;
+
+    /** Returns a <strike> HTML element */
+    strike(): string;
+
+    /** Returns a <sub> HTML element */
+    sub(): string;
+
+    /** Returns a <sup> HTML element */
+    sup(): string;
+}
+
+interface StringConstructor {
+    /**
+     * Return the String value whose elements are, in order, the elements in the List elements.
+     * If length is 0, the empty string is returned.
+     */
+    fromCodePoint(...codePoints: number[]): string;
+
+    /**
+     * String.raw is intended for use as a tag function of a Tagged Template String. When called
+     * as such the first argument will be a well formed template call site object and the rest
+     * parameter will contain the substitution values.
+     * @param template A well-formed template string call site representation.
+     * @param substitutions A set of substitution values.
+     */
+    raw(template: TemplateStringsArray, ...substitutions: any[]): string;
+}
+
+
+interface Map<K, V> {
+    clear(): void;
+    delete(key: K): boolean;
+    forEach(callbackfn: (value: V, key: K, map: Map<K, V>) => void, thisArg?: any): void;
+    get(key: K): V | undefined;
+    has(key: K): boolean;
+    set(key: K, value: V): this;
+    readonly size: number;
+}
+
+interface MapConstructor {
+    new (): Map<any, any>;
+    new <K, V>(entries?: [K, V][]): Map<K, V>;
+    readonly prototype: Map<any, any>;
+}
+declare var Map: MapConstructor;
+
+interface ReadonlyMap<K, V> {
+    forEach(callbackfn: (value: V, key: K, map: ReadonlyMap<K, V>) => void, thisArg?: any): void;
+    get(key: K): V | undefined;
+    has(key: K): boolean;
+    readonly size: number;
+}
+
+interface WeakMap<K extends object, V> {
+    delete(key: K): boolean;
+    get(key: K): V | undefined;
+    has(key: K): boolean;
+    set(key: K, value: V): this;
+}
+
+interface WeakMapConstructor {
+    new (): WeakMap<object, any>;
+    new <K extends object, V>(entries?: [K, V][]): WeakMap<K, V>;
+    readonly prototype: WeakMap<object, any>;
+}
+declare var WeakMap: WeakMapConstructor;
+
+interface Set<T> {
+    add(value: T): this;
+    clear(): void;
+    delete(value: T): boolean;
+    forEach(callbackfn: (value: T, value2: T, set: Set<T>) => void, thisArg?: any): void;
+    has(value: T): boolean;
+    readonly size: number;
+}
+
+interface SetConstructor {
+    new (): Set<any>;
+    new <T>(values?: T[]): Set<T>;
+    readonly prototype: Set<any>;
+}
+declare var Set: SetConstructor;
+
+interface ReadonlySet<T> {
+    forEach(callbackfn: (value: T, value2: T, set: ReadonlySet<T>) => void, thisArg?: any): void;
+    has(value: T): boolean;
+    readonly size: number;
+}
+
+interface WeakSet<T> {
+    add(value: T): this;
+    delete(value: T): boolean;
+    has(value: T): boolean;
+}
+
+interface WeakSetConstructor {
+    new (): WeakSet<object>;
+    new <T extends object>(values?: T[]): WeakSet<T>;
+    readonly prototype: WeakSet<object>;
+}
+declare var WeakSet: WeakSetConstructor;
+
+
+interface Generator extends Iterator<any> { }
+
+interface GeneratorFunction {
+    /**
+     * Creates a new Generator object.
+     * @param args A list of arguments the function accepts.
+     */
+    new (...args: any[]): Generator;
+    /**
+     * Creates a new Generator object.
+     * @param args A list of arguments the function accepts.
+     */
+    (...args: any[]): Generator;
+    /**
+     * The length of the arguments.
+     */
+    readonly length: number;
+    /**
+     * Returns the name of the function.
+     */
+    readonly name: string;
+    /**
+     * A reference to the prototype.
+     */
+    readonly prototype: Generator;
+}
+
+interface GeneratorFunctionConstructor {
+    /**
+     * Creates a new Generator function.
+     * @param args A list of arguments the function accepts.
+     */
+    new (...args: string[]): GeneratorFunction;
+    /**
+     * Creates a new Generator function.
+     * @param args A list of arguments the function accepts.
+     */
+    (...args: string[]): GeneratorFunction;
+    /**
+     * The length of the arguments.
+     */
+    readonly length: number;
+    /**
+     * Returns the name of the function.
+     */
+    readonly name: string;
+    /**
+     * A reference to the prototype.
+     */
+    readonly prototype: GeneratorFunction;
+}
+declare var GeneratorFunction: GeneratorFunctionConstructor;
+
+
+/// <reference path="lib.es2015.symbol.d.ts" />
+
+interface SymbolConstructor {
+    /**
+     * A method that returns the default iterator for an object. Called by the semantics of the
+     * for-of statement.
+     */
+    readonly iterator: symbol;
+}
+
+interface IteratorResult<T> {
+    done: boolean;
+    value: T;
+}
+
+interface Iterator<T> {
+    next(value?: any): IteratorResult<T>;
+    return?(value?: any): IteratorResult<T>;
+    throw?(e?: any): IteratorResult<T>;
+}
+
+interface Iterable<T> {
+    [Symbol.iterator](): Iterator<T>;
+}
+
+interface IterableIterator<T> extends Iterator<T> {
+    [Symbol.iterator](): IterableIterator<T>;
+}
+
+interface Array<T> {
+    /** Iterator */
+    [Symbol.iterator](): IterableIterator<T>;
+
+    /**
+     * Returns an iterable of key, value pairs for every entry in the array
+     */
+    entries(): IterableIterator<[number, T]>;
+
+    /**
+     * Returns an iterable of keys in the array
+     */
+    keys(): IterableIterator<number>;
+
+    /**
+     * Returns an iterable of values in the array
+     */
+    values(): IterableIterator<T>;
+}
+
+interface ArrayConstructor {
+    /**
+     * Creates an array from an iterable object.
+     * @param iterable An iterable object to convert to an array.
+     * @param mapfn A mapping function to call on every element of the array.
+     * @param thisArg Value of 'this' used to invoke the mapfn.
+     */
+    from<T, U>(iterable: Iterable<T>, mapfn: (this: void, v: T, k: number) => U): Array<U>;
+    from<T, U>(iterable: Iterable<T>, mapfn: (this: void, v: T, k: number) => U, thisArg: undefined): Array<U>;
+    from<Z, T, U>(iterable: Iterable<T>, mapfn: (this: Z, v: T, k: number) => U, thisArg: Z): Array<U>;
+
+    /**
+     * Creates an array from an iterable object.
+     * @param iterable An iterable object to convert to an array.
+     */
+    from<T>(iterable: Iterable<T>): Array<T>;
+}
+
+interface ReadonlyArray<T> {
+    /** Iterator of values in the array. */
+    [Symbol.iterator](): IterableIterator<T>;
+
+    /**
+     * Returns an iterable of key, value pairs for every entry in the array
+     */
+    entries(): IterableIterator<[number, T]>;
+
+    /**
+     * Returns an iterable of keys in the array
+     */
+    keys(): IterableIterator<number>;
+
+    /**
+     * Returns an iterable of values in the array
+     */
+    values(): IterableIterator<T>;
+}
+
+interface IArguments {
+    /** Iterator */
+    [Symbol.iterator](): IterableIterator<any>;
+}
+
+interface Map<K, V> {
+    /** Returns an iterable of entries in the map. */
+    [Symbol.iterator](): IterableIterator<[K, V]>;
+
+    /**
+     * Returns an iterable of key, value pairs for every entry in the map.
+     */
+    entries(): IterableIterator<[K, V]>;
+
+    /**
+     * Returns an iterable of keys in the map
+     */
+    keys(): IterableIterator<K>;
+
+    /**
+     * Returns an iterable of values in the map
+     */
+    values(): IterableIterator<V>;
+}
+
+interface ReadonlyMap<K, V> {
+    /** Returns an iterable of entries in the map. */
+    [Symbol.iterator](): IterableIterator<[K, V]>;
+
+    /**
+     * Returns an iterable of key, value pairs for every entry in the map.
+     */
+    entries(): IterableIterator<[K, V]>;
+
+    /**
+     * Returns an iterable of keys in the map
+     */
+    keys(): IterableIterator<K>;
+
+    /**
+     * Returns an iterable of values in the map
+     */
+    values(): IterableIterator<V>;
+}
+
+interface MapConstructor {
+    new <K, V>(iterable: Iterable<[K, V]>): Map<K, V>;
+}
+
+interface WeakMap<K extends object, V> { }
+
+interface WeakMapConstructor {
+    new <K extends object, V>(iterable: Iterable<[K, V]>): WeakMap<K, V>;
+}
+
+interface Set<T> {
+    /** Iterates over values in the set. */
+    [Symbol.iterator](): IterableIterator<T>;
+    /**
+     * Returns an iterable of [v,v] pairs for every value `v` in the set.
+     */
+    entries(): IterableIterator<[T, T]>;
+    /**
+     * Despite its name, returns an iterable of the values in the set,
+     */
+    keys(): IterableIterator<T>;
+
+    /**
+     * Returns an iterable of values in the set.
+     */
+    values(): IterableIterator<T>;
+}
+
+interface ReadonlySet<T> {
+    /** Iterates over values in the set. */
+    [Symbol.iterator](): IterableIterator<T>;
+
+    /**
+     * Returns an iterable of [v,v] pairs for every value `v` in the set.
+     */
+    entries(): IterableIterator<[T, T]>;
+
+    /**
+     * Despite its name, returns an iterable of the values in the set,
+     */
+    keys(): IterableIterator<T>;
+
+    /**
+     * Returns an iterable of values in the set.
+     */
+    values(): IterableIterator<T>;
+}
+
+interface SetConstructor {
+    new <T>(iterable: Iterable<T>): Set<T>;
+}
+
+interface WeakSet<T> { }
+
+interface WeakSetConstructor {
+    new <T extends object>(iterable: Iterable<T>): WeakSet<T>;
+}
+
+interface Promise<T> { }
+
+interface PromiseConstructor {
+    /**
+     * Creates a Promise that is resolved with an array of results when all of the provided Promises
+     * resolve, or rejected when any Promise is rejected.
+     * @param values An array of Promises.
+     * @returns A new Promise.
+     */
+    all<TAll>(values: Iterable<TAll | PromiseLike<TAll>>): Promise<TAll[]>;
+
+    /**
+     * Creates a Promise that is resolved or rejected when any of the provided Promises are resolved
+     * or rejected.
+     * @param values An array of Promises.
+     * @returns A new Promise.
+     */
+    race<T>(values: Iterable<T | PromiseLike<T>>): Promise<T>;
+}
+
+declare namespace Reflect {
+    function enumerate(target: object): IterableIterator<any>;
+}
+
+interface String {
+    /** Iterator */
+    [Symbol.iterator](): IterableIterator<string>;
+}
+
+/**
+ * A typed array of 8-bit integer values. The contents are initialized to 0. If the requested
+ * number of bytes could not be allocated an exception is raised.
+ */
+interface Int8Array {
+    [Symbol.iterator](): IterableIterator<number>;
+    /**
+     * Returns an array of key, value pairs for every entry in the array
+     */
+    entries(): IterableIterator<[number, number]>;
+    /**
+     * Returns an list of keys in the array
+     */
+    keys(): IterableIterator<number>;
+    /**
+     * Returns an list of values in the array
+     */
+    values(): IterableIterator<number>;
+}
+
+interface Int8ArrayConstructor {
+    new (elements: Iterable<number>): Int8Array;
+
+    /**
+     * Creates an array from an array-like or iterable object.
+     * @param arrayLike An array-like or iterable object to convert to an array.
+     * @param mapfn A mapping function to call on every element of the array.
+     * @param thisArg Value of 'this' used to invoke the mapfn.
+     */
+    from(arrayLike: Iterable<number>, mapfn: (this: void, v: number, k: number) => number): Int8Array;
+    from(arrayLike: Iterable<number>, mapfn: (this: void, v: number, k: number) => number, thisArg: undefined): Int8Array;
+    from<Z>(arrayLike: Iterable<number>, mapfn: (this: Z, v: number, k: number) => number, thisArg: Z): Int8Array;
+
+    from(arrayLike: Iterable<number>): Int8Array;
+}
+
+/**
+ * A typed array of 8-bit unsigned integer values. The contents are initialized to 0. If the
+ * requested number of bytes could not be allocated an exception is raised.
+ */
+interface Uint8Array {
+    [Symbol.iterator](): IterableIterator<number>;
+    /**
+     * Returns an array of key, value pairs for every entry in the array
+     */
+    entries(): IterableIterator<[number, number]>;
+    /**
+     * Returns an list of keys in the array
+     */
+    keys(): IterableIterator<number>;
+    /**
+     * Returns an list of values in the array
+     */
+    values(): IterableIterator<number>;
+}
+
+interface Uint8ArrayConstructor {
+    new (elements: Iterable<number>): Uint8Array;
+
+    /**
+     * Creates an array from an array-like or iterable object.
+     * @param arrayLike An array-like or iterable object to convert to an array.
+     * @param mapfn A mapping function to call on every element of the array.
+     * @param thisArg Value of 'this' used to invoke the mapfn.
+     */
+    from(arrayLike: Iterable<number>, mapfn: (this: void, v: number, k: number) => number): Uint8Array;
+    from(arrayLike: Iterable<number>, mapfn: (this: void, v: number, k: number) => number, thisArg: undefined): Uint8Array;
+    from<Z>(arrayLike: Iterable<number>, mapfn: (this: Z, v: number, k: number) => number, thisArg: Z): Uint8Array;
+
+    from(arrayLike: Iterable<number>): Uint8Array;
+}
+
+/**
+ * A typed array of 8-bit unsigned integer (clamped) values. The contents are initialized to 0.
+ * If the requested number of bytes could not be allocated an exception is raised.
+ */
+interface Uint8ClampedArray {
+    [Symbol.iterator](): IterableIterator<number>;
+    /**
+     * Returns an array of key, value pairs for every entry in the array
+     */
+    entries(): IterableIterator<[number, number]>;
+
+    /**
+     * Returns an list of keys in the array
+     */
+    keys(): IterableIterator<number>;
+
+    /**
+     * Returns an list of values in the array
+     */
+    values(): IterableIterator<number>;
+}
+
+interface Uint8ClampedArrayConstructor {
+    new (elements: Iterable<number>): Uint8ClampedArray;
+
+
+    /**
+     * Creates an array from an array-like or iterable object.
+     * @param arrayLike An array-like or iterable object to convert to an array.
+     * @param mapfn A mapping function to call on every element of the array.
+     * @param thisArg Value of 'this' used to invoke the mapfn.
+     */
+    from(arrayLike: Iterable<number>, mapfn: (this: void, v: number, k: number) => number): Uint8ClampedArray;
+    from(arrayLike: Iterable<number>, mapfn: (this: void, v: number, k: number) => number, thisArg: undefined): Uint8ClampedArray;
+    from<Z>(arrayLike: Iterable<number>, mapfn: (this: Z, v: number, k: number) => number, thisArg: Z): Uint8ClampedArray;
+
+    from(arrayLike: Iterable<number>): Uint8ClampedArray;
+}
+
+/**
+ * A typed array of 16-bit signed integer values. The contents are initialized to 0. If the
+ * requested number of bytes could not be allocated an exception is raised.
+ */
+interface Int16Array {
+    [Symbol.iterator](): IterableIterator<number>;
+    /**
+     * Returns an array of key, value pairs for every entry in the array
+     */
+    entries(): IterableIterator<[number, number]>;
+
+    /**
+     * Returns an list of keys in the array
+     */
+    keys(): IterableIterator<number>;
+
+    /**
+     * Returns an list of values in the array
+     */
+    values(): IterableIterator<number>;
+}
+
+interface Int16ArrayConstructor {
+    new (elements: Iterable<number>): Int16Array;
+
+    /**
+     * Creates an array from an array-like or iterable object.
+     * @param arrayLike An array-like or iterable object to convert to an array.
+     * @param mapfn A mapping function to call on every element of the array.
+     * @param thisArg Value of 'this' used to invoke the mapfn.
+     */
+    from(arrayLike: Iterable<number>, mapfn: (this: void, v: number, k: number) => number): Int16Array;
+    from(arrayLike: Iterable<number>, mapfn: (this: void, v: number, k: number) => number, thisArg: undefined): Int16Array;
+    from<Z>(arrayLike: Iterable<number>, mapfn: (this: Z, v: number, k: number) => number, thisArg: Z): Int16Array;
+
+    from(arrayLike: Iterable<number>): Int16Array;
+}
+
+/**
+ * A typed array of 16-bit unsigned integer values. The contents are initialized to 0. If the
+ * requested number of bytes could not be allocated an exception is raised.
+ */
+interface Uint16Array {
+    [Symbol.iterator](): IterableIterator<number>;
+    /**
+     * Returns an array of key, value pairs for every entry in the array
+     */
+    entries(): IterableIterator<[number, number]>;
+    /**
+     * Returns an list of keys in the array
+     */
+    keys(): IterableIterator<number>;
+    /**
+     * Returns an list of values in the array
+     */
+    values(): IterableIterator<number>;
+}
+
+interface Uint16ArrayConstructor {
+    new (elements: Iterable<number>): Uint16Array;
+
+    /**
+     * Creates an array from an array-like or iterable object.
+     * @param arrayLike An array-like or iterable object to convert to an array.
+     * @param mapfn A mapping function to call on every element of the array.
+     * @param thisArg Value of 'this' used to invoke the mapfn.
+     */
+    from(arrayLike: Iterable<number>, mapfn: (this: void, v: number, k: number) => number): Uint16Array;
+    from(arrayLike: Iterable<number>, mapfn: (this: void, v: number, k: number) => number, thisArg: undefined): Uint16Array;
+    from<Z>(arrayLike: Iterable<number>, mapfn: (this: Z, v: number, k: number) => number, thisArg: Z): Uint16Array;
+
+    from(arrayLike: Iterable<number>): Uint16Array;
+}
+
+/**
+ * A typed array of 32-bit signed integer values. The contents are initialized to 0. If the
+ * requested number of bytes could not be allocated an exception is raised.
+ */
+interface Int32Array {
+    [Symbol.iterator](): IterableIterator<number>;
+    /**
+     * Returns an array of key, value pairs for every entry in the array
+     */
+    entries(): IterableIterator<[number, number]>;
+    /**
+     * Returns an list of keys in the array
+     */
+    keys(): IterableIterator<number>;
+    /**
+     * Returns an list of values in the array
+     */
+    values(): IterableIterator<number>;
+}
+
+interface Int32ArrayConstructor {
+    new (elements: Iterable<number>): Int32Array;
+
+    /**
+     * Creates an array from an array-like or iterable object.
+     * @param arrayLike An array-like or iterable object to convert to an array.
+     * @param mapfn A mapping function to call on every element of the array.
+     * @param thisArg Value of 'this' used to invoke the mapfn.
+     */
+    from(arrayLike: Iterable<number>, mapfn: (this: void, v: number, k: number) => number): Int32Array;
+    from(arrayLike: Iterable<number>, mapfn: (this: void, v: number, k: number) => number, thisArg: undefined): Int32Array;
+    from<Z>(arrayLike: Iterable<number>, mapfn: (this: Z, v: number, k: number) => number, thisArg: Z): Int32Array;
+
+    from(arrayLike: Iterable<number>): Int32Array;
+}
+
+/**
+ * A typed array of 32-bit unsigned integer values. The contents are initialized to 0. If the
+ * requested number of bytes could not be allocated an exception is raised.
+ */
+interface Uint32Array {
+    [Symbol.iterator](): IterableIterator<number>;
+    /**
+     * Returns an array of key, value pairs for every entry in the array
+     */
+    entries(): IterableIterator<[number, number]>;
+    /**
+     * Returns an list of keys in the array
+     */
+    keys(): IterableIterator<number>;
+    /**
+     * Returns an list of values in the array
+     */
+    values(): IterableIterator<number>;
+}
+
+interface Uint32ArrayConstructor {
+    new (elements: Iterable<number>): Uint32Array;
+
+    /**
+     * Creates an array from an array-like or iterable object.
+     * @param arrayLike An array-like or iterable object to convert to an array.
+     * @param mapfn A mapping function to call on every element of the array.
+     * @param thisArg Value of 'this' used to invoke the mapfn.
+     */
+    from(arrayLike: Iterable<number>, mapfn: (this: void, v: number, k: number) => number): Uint32Array;
+    from(arrayLike: Iterable<number>, mapfn: (this: void, v: number, k: number) => number, thisArg: undefined): Uint32Array;
+    from<Z>(arrayLike: Iterable<number>, mapfn: (this: Z, v: number, k: number) => number, thisArg: Z): Uint32Array;
+
+    from(arrayLike: Iterable<number>): Uint32Array;
+}
+
+/**
+ * A typed array of 32-bit float values. The contents are initialized to 0. If the requested number
+ * of bytes could not be allocated an exception is raised.
+ */
+interface Float32Array {
+    [Symbol.iterator](): IterableIterator<number>;
+    /**
+     * Returns an array of key, value pairs for every entry in the array
+     */
+    entries(): IterableIterator<[number, number]>;
+    /**
+     * Returns an list of keys in the array
+     */
+    keys(): IterableIterator<number>;
+    /**
+     * Returns an list of values in the array
+     */
+    values(): IterableIterator<number>;
+}
+
+interface Float32ArrayConstructor {
+    new (elements: Iterable<number>): Float32Array;
+
+    /**
+     * Creates an array from an array-like or iterable object.
+     * @param arrayLike An array-like or iterable object to convert to an array.
+     * @param mapfn A mapping function to call on every element of the array.
+     * @param thisArg Value of 'this' used to invoke the mapfn.
+     */
+    from(arrayLike: Iterable<number>, mapfn: (this: void, v: number, k: number) => number): Float32Array;
+    from(arrayLike: Iterable<number>, mapfn: (this: void, v: number, k: number) => number, thisArg: undefined): Float32Array;
+    from<Z>(arrayLike: Iterable<number>, mapfn: (this: Z, v: number, k: number) => number, thisArg: Z): Float32Array;
+
+    from(arrayLike: Iterable<number>): Float32Array;
+}
+
+/**
+ * A typed array of 64-bit float values. The contents are initialized to 0. If the requested
+ * number of bytes could not be allocated an exception is raised.
+ */
+interface Float64Array {
+    [Symbol.iterator](): IterableIterator<number>;
+    /**
+     * Returns an array of key, value pairs for every entry in the array
+     */
+    entries(): IterableIterator<[number, number]>;
+    /**
+     * Returns an list of keys in the array
+     */
+    keys(): IterableIterator<number>;
+    /**
+     * Returns an list of values in the array
+     */
+    values(): IterableIterator<number>;
+}
+
+interface Float64ArrayConstructor {
+    new (elements: Iterable<number>): Float64Array;
+
+    /**
+     * Creates an array from an array-like or iterable object.
+     * @param arrayLike An array-like or iterable object to convert to an array.
+     * @param mapfn A mapping function to call on every element of the array.
+     * @param thisArg Value of 'this' used to invoke the mapfn.
+     */
+    from(arrayLike: Iterable<number>, mapfn: (this: void, v: number, k: number) => number): Float64Array;
+    from(arrayLike: Iterable<number>, mapfn: (this: void, v: number, k: number) => number, thisArg: undefined): Float64Array;
+    from<Z>(arrayLike: Iterable<number>, mapfn: (this: Z, v: number, k: number) => number, thisArg: Z): Float64Array;
+
+    from(arrayLike: Iterable<number>): Float64Array;
+}
+
+
+interface PromiseConstructor {
+    /**
+     * A reference to the prototype.
+     */
+    readonly prototype: Promise<any>;
+
+    /**
+     * Creates a new Promise.
+     * @param executor A callback used to initialize the promise. This callback is passed two arguments:
+     * a resolve callback used resolve the promise with a value or the result of another promise,
+     * and a reject callback used to reject the promise with a provided reason or error.
+     */
+    new <T>(executor: (resolve: (value?: T | PromiseLike<T>) => void, reject: (reason?: any) => void) => void): Promise<T>;
+
+    /**
+     * Creates a Promise that is resolved with an array of results when all of the provided Promises
+     * resolve, or rejected when any Promise is rejected.
+     * @param values An array of Promises.
+     * @returns A new Promise.
+     */
+    all<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike <T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>, T7 | PromiseLike<T7>, T8 | PromiseLike<T8>, T9 | PromiseLike<T9>, T10 | PromiseLike<T10>]): Promise<[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10]>;
+
+    /**
+     * Creates a Promise that is resolved with an array of results when all of the provided Promises
+     * resolve, or rejected when any Promise is rejected.
+     * @param values An array of Promises.
+     * @returns A new Promise.
+     */
+    all<T1, T2, T3, T4, T5, T6, T7, T8, T9>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike <T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>, T7 | PromiseLike<T7>, T8 | PromiseLike<T8>, T9 | PromiseLike<T9>]): Promise<[T1, T2, T3, T4, T5, T6, T7, T8, T9]>;
+
+    /**
+     * Creates a Promise that is resolved with an array of results when all of the provided Promises
+     * resolve, or rejected when any Promise is rejected.
+     * @param values An array of Promises.
+     * @returns A new Promise.
+     */
+    all<T1, T2, T3, T4, T5, T6, T7, T8>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike <T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>, T7 | PromiseLike<T7>, T8 | PromiseLike<T8>]): Promise<[T1, T2, T3, T4, T5, T6, T7, T8]>;
+
+    /**
+     * Creates a Promise that is resolved with an array of results when all of the provided Promises
+     * resolve, or rejected when any Promise is rejected.
+     * @param values An array of Promises.
+     * @returns A new Promise.
+     */
+    all<T1, T2, T3, T4, T5, T6, T7>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike <T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>, T7 | PromiseLike<T7>]): Promise<[T1, T2, T3, T4, T5, T6, T7]>;
+
+    /**
+     * Creates a Promise that is resolved with an array of results when all of the provided Promises
+     * resolve, or rejected when any Promise is rejected.
+     * @param values An array of Promises.
+     * @returns A new Promise.
+     */
+    all<T1, T2, T3, T4, T5, T6>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike <T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>]): Promise<[T1, T2, T3, T4, T5, T6]>;
+
+    /**
+     * Creates a Promise that is resolved with an array of results when all of the provided Promises
+     * resolve, or rejected when any Promise is rejected.
+     * @param values An array of Promises.
+     * @returns A new Promise.
+     */
+    all<T1, T2, T3, T4, T5>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike <T4>, T5 | PromiseLike<T5>]): Promise<[T1, T2, T3, T4, T5]>;
+
+    /**
+     * Creates a Promise that is resolved with an array of results when all of the provided Promises
+     * resolve, or rejected when any Promise is rejected.
+     * @param values An array of Promises.
+     * @returns A new Promise.
+     */
+    all<T1, T2, T3, T4>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike <T4>]): Promise<[T1, T2, T3, T4]>;
+
+    /**
+     * Creates a Promise that is resolved with an array of results when all of the provided Promises
+     * resolve, or rejected when any Promise is rejected.
+     * @param values An array of Promises.
+     * @returns A new Promise.
+     */
+    all<T1, T2, T3>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>]): Promise<[T1, T2, T3]>;
+
+    /**
+     * Creates a Promise that is resolved with an array of results when all of the provided Promises
+     * resolve, or rejected when any Promise is rejected.
+     * @param values An array of Promises.
+     * @returns A new Promise.
+     */
+    all<T1, T2>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>]): Promise<[T1, T2]>;
+
+    /**
+     * Creates a Promise that is resolved with an array of results when all of the provided Promises
+     * resolve, or rejected when any Promise is rejected.
+     * @param values An array of Promises.
+     * @returns A new Promise.
+     */
+    all<T>(values: (T | PromiseLike<T>)[]): Promise<T[]>;
+
+    /**
+     * Creates a Promise that is resolved or rejected when any of the provided Promises are resolved
+     * or rejected.
+     * @param values An array of Promises.
+     * @returns A new Promise.
+     */
+    race<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike<T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>, T7 | PromiseLike<T7>, T8 | PromiseLike<T8>, T9 | PromiseLike<T9>, T10 | PromiseLike<T10>]): Promise<T1 | T2 | T3 | T4 | T5 | T6 | T7 | T8 | T9 | T10>;
+
+    /**
+     * Creates a Promise that is resolved or rejected when any of the provided Promises are resolved
+     * or rejected.
+     * @param values An array of Promises.
+     * @returns A new Promise.
+     */
+    race<T1, T2, T3, T4, T5, T6, T7, T8, T9>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike<T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>, T7 | PromiseLike<T7>, T8 | PromiseLike<T8>, T9 | PromiseLike<T9>]): Promise<T1 | T2 | T3 | T4 | T5 | T6 | T7 | T8 | T9>;
+
+    /**
+     * Creates a Promise that is resolved or rejected when any of the provided Promises are resolved
+     * or rejected.
+     * @param values An array of Promises.
+     * @returns A new Promise.
+     */
+    race<T1, T2, T3, T4, T5, T6, T7, T8>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike<T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>, T7 | PromiseLike<T7>, T8 | PromiseLike<T8>]): Promise<T1 | T2 | T3 | T4 | T5 | T6 | T7 | T8>;
+
+    /**
+     * Creates a Promise that is resolved or rejected when any of the provided Promises are resolved
+     * or rejected.
+     * @param values An array of Promises.
+     * @returns A new Promise.
+     */
+    race<T1, T2, T3, T4, T5, T6, T7>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike<T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>, T7 | PromiseLike<T7>]): Promise<T1 | T2 | T3 | T4 | T5 | T6 | T7>;
+
+    /**
+     * Creates a Promise that is resolved or rejected when any of the provided Promises are resolved
+     * or rejected.
+     * @param values An array of Promises.
+     * @returns A new Promise.
+     */
+    race<T1, T2, T3, T4, T5, T6>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike<T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>]): Promise<T1 | T2 | T3 | T4 | T5 | T6>;
+
+    /**
+     * Creates a Promise that is resolved or rejected when any of the provided Promises are resolved
+     * or rejected.
+     * @param values An array of Promises.
+     * @returns A new Promise.
+     */
+    race<T1, T2, T3, T4, T5>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike<T4>, T5 | PromiseLike<T5>]): Promise<T1 | T2 | T3 | T4 | T5>;
+
+    /**
+     * Creates a Promise that is resolved or rejected when any of the provided Promises are resolved
+     * or rejected.
+     * @param values An array of Promises.
+     * @returns A new Promise.
+     */
+    race<T1, T2, T3, T4>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike<T4>]): Promise<T1 | T2 | T3 | T4>;
+
+    /**
+     * Creates a Promise that is resolved or rejected when any of the provided Promises are resolved
+     * or rejected.
+     * @param values An array of Promises.
+     * @returns A new Promise.
+     */
+    race<T1, T2, T3>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>]): Promise<T1 | T2 | T3>;
+
+    /**
+     * Creates a Promise that is resolved or rejected when any of the provided Promises are resolved
+     * or rejected.
+     * @param values An array of Promises.
+     * @returns A new Promise.
+     */
+    race<T1, T2>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>]): Promise<T1 | T2>;
+
+    /**
+     * Creates a Promise that is resolved or rejected when any of the provided Promises are resolved
+     * or rejected.
+     * @param values An array of Promises.
+     * @returns A new Promise.
+     */
+    race<T>(values: (T | PromiseLike<T>)[]): Promise<T>;
+
+    /**
+     * Creates a new rejected promise for the provided reason.
+     * @param reason The reason the promise was rejected.
+     * @returns A new rejected Promise.
+     */
+    reject(reason: any): Promise<never>;
+
+    /**
+     * Creates a new rejected promise for the provided reason.
+     * @param reason The reason the promise was rejected.
+     * @returns A new rejected Promise.
+     */
+    reject<T>(reason: any): Promise<T>;
+
+    /**
+     * Creates a new resolved promise for the provided value.
+     * @param value A promise.
+     * @returns A promise whose internal state matches the provided promise.
+     */
+    resolve<T>(value: T | PromiseLike<T>): Promise<T>;
+
+    /**
+     * Creates a new resolved promise .
+     * @returns A resolved promise.
+     */
+    resolve(): Promise<void>;
+}
+
+declare var Promise: PromiseConstructor;
+
+interface ProxyHandler<T extends object> {
+    getPrototypeOf? (target: T): object | null;
+    setPrototypeOf? (target: T, v: any): boolean;
+    isExtensible? (target: T): boolean;
+    preventExtensions? (target: T): boolean;
+    getOwnPropertyDescriptor? (target: T, p: PropertyKey): PropertyDescriptor | undefined;
+    has? (target: T, p: PropertyKey): boolean;
+    get? (target: T, p: PropertyKey, receiver: any): any;
+    set? (target: T, p: PropertyKey, value: any, receiver: any): boolean;
+    deleteProperty? (target: T, p: PropertyKey): boolean;
+    defineProperty? (target: T, p: PropertyKey, attributes: PropertyDescriptor): boolean;
+    enumerate? (target: T): PropertyKey[];
+    ownKeys? (target: T): PropertyKey[];
+    apply? (target: T, thisArg: any, argArray?: any): any;
+    construct? (target: T, argArray: any, newTarget?: any): object;
+}
+
+interface ProxyConstructor {
+    revocable<T extends object>(target: T, handler: ProxyHandler<T>): { proxy: T; revoke: () => void; };
+    new <T extends object>(target: T, handler: ProxyHandler<T>): T;
+}
+declare var Proxy: ProxyConstructor;
+
+
+declare namespace Reflect {
+    function apply(target: Function, thisArgument: any, argumentsList: ArrayLike<any>): any;
+    function construct(target: Function, argumentsList: ArrayLike<any>, newTarget?: any): any;
+    function defineProperty(target: object, propertyKey: PropertyKey, attributes: PropertyDescriptor): boolean;
+    function deleteProperty(target: object, propertyKey: PropertyKey): boolean;
+    function get(target: object, propertyKey: PropertyKey, receiver?: any): any;
+    function getOwnPropertyDescriptor(target: object, propertyKey: PropertyKey): PropertyDescriptor;
+    function getPrototypeOf(target: object): object;
+    function has(target: object, propertyKey: PropertyKey): boolean;
+    function isExtensible(target: object): boolean;
+    function ownKeys(target: object): Array<PropertyKey>;
+    function preventExtensions(target: object): boolean;
+    function set(target: object, propertyKey: PropertyKey, value: any, receiver?: any): boolean;
+    function setPrototypeOf(target: object, proto: any): boolean;
+}
+
+
+interface Symbol {
+    /** Returns a string representation of an object. */
+    toString(): string;
+
+    /** Returns the primitive value of the specified object. */
+    valueOf(): symbol;
+}
+
+interface SymbolConstructor {
+    /**
+     * A reference to the prototype.
+     */
+    readonly prototype: Symbol;
+
+    /**
+     * Returns a new unique Symbol value.
+     * @param  description Description of the new Symbol object.
+     */
+    (description?: string | number): symbol;
+
+    /**
+     * Returns a Symbol object from the global symbol registry matching the given key if found.
+     * Otherwise, returns a new symbol with this key.
+     * @param key key to search for.
+     */
+    for(key: string): symbol;
+
+    /**
+     * Returns a key from the global symbol registry matching the given Symbol if found.
+     * Otherwise, returns a undefined.
+     * @param sym Symbol to find the key for.
+     */
+    keyFor(sym: symbol): string | undefined;
+}
+
+declare var Symbol: SymbolConstructor;
+
+/// <reference path="lib.es2015.symbol.d.ts" />
+
+interface SymbolConstructor {
+    /**
+     * A method that determines if a constructor object recognizes an object as one of the
+     * constructor’s instances. Called by the semantics of the instanceof operator.
+     */
+    readonly hasInstance: symbol;
+
+    /**
+     * A Boolean value that if true indicates that an object should flatten to its array elements
+     * by Array.prototype.concat.
+     */
+    readonly isConcatSpreadable: symbol;
+
+    /**
+     * A regular expression method that matches the regular expression against a string. Called
+     * by the String.prototype.match method.
+     */
+    readonly match: symbol;
+
+    /**
+     * A regular expression method that replaces matched substrings of a string. Called by the
+     * String.prototype.replace method.
+     */
+    readonly replace: symbol;
+
+    /**
+     * A regular expression method that returns the index within a string that matches the
+     * regular expression. Called by the String.prototype.search method.
+     */
+    readonly search: symbol;
+
+    /**
+     * A function valued property that is the constructor function that is used to create
+     * derived objects.
+     */
+    readonly species: symbol;
+
+    /**
+     * A regular expression method that splits a string at the indices that match the regular
+     * expression. Called by the String.prototype.split method.
+     */
+    readonly split: symbol;
+
+    /**
+     * A method that converts an object to a corresponding primitive value.
+     * Called by the ToPrimitive abstract operation.
+     */
+    readonly toPrimitive: symbol;
+
+    /**
+     * A String value that is used in the creation of the default string description of an object.
+     * Called by the built-in method Object.prototype.toString.
+     */
+    readonly toStringTag: symbol;
+
+    /**
+     * An Object whose own property names are property names that are excluded from the 'with'
+     * environment bindings of the associated objects.
+     */
+    readonly unscopables: symbol;
+}
+
+interface Symbol {
+    readonly [Symbol.toStringTag]: "Symbol";
+}
+
+interface Array<T> {
+    /**
+     * Returns an object whose properties have the value 'true'
+     * when they will be absent when used in a 'with' statement.
+     */
+    [Symbol.unscopables](): {
+        copyWithin: boolean;
+        entries: boolean;
+        fill: boolean;
+        find: boolean;
+        findIndex: boolean;
+        keys: boolean;
+        values: boolean;
+    };
+}
+
+interface Date {
+    /**
+     * Converts a Date object to a string.
+     */
+    [Symbol.toPrimitive](hint: "default"): string;
+    /**
+     * Converts a Date object to a string.
+     */
+    [Symbol.toPrimitive](hint: "string"): string;
+    /**
+     * Converts a Date object to a number.
+     */
+    [Symbol.toPrimitive](hint: "number"): number;
+    /**
+     * Converts a Date object to a string or number.
+     *
+     * @param hint The strings "number", "string", or "default" to specify what primitive to return.
+     *
+     * @throws {TypeError} If 'hint' was given something other than "number", "string", or "default".
+     * @returns A number if 'hint' was "number", a string if 'hint' was "string" or "default".
+     */
+    [Symbol.toPrimitive](hint: string): string | number;
+}
+
+interface Map<K, V> {
+    readonly [Symbol.toStringTag]: "Map";
+}
+
+interface WeakMap<K extends object, V>{
+    readonly [Symbol.toStringTag]: "WeakMap";
+}
+
+interface Set<T> {
+    readonly [Symbol.toStringTag]: "Set";
+}
+
+interface WeakSet<T> {
+    readonly [Symbol.toStringTag]: "WeakSet";
+}
+
+interface JSON {
+    readonly [Symbol.toStringTag]: "JSON";
+}
+
+interface Function {
+    /**
+     * Determines whether the given value inherits from this function if this function was used
+     * as a constructor function.
+     *
+     * A constructor function can control which objects are recognized as its instances by
+     * 'instanceof' by overriding this method.
+     */
+    [Symbol.hasInstance](value: any): boolean;
+}
+
+interface GeneratorFunction {
+    readonly [Symbol.toStringTag]: "GeneratorFunction";
+}
+
+interface Math {
+    readonly [Symbol.toStringTag]: "Math";
+}
+
+interface Promise<T> {
+    readonly [Symbol.toStringTag]: "Promise";
+}
+
+interface PromiseConstructor {
+    readonly [Symbol.species]: Function;
+}
+
+interface RegExp {
+    /**
+     * Matches a string with this regular expression, and returns an array containing the results of
+     * that search.
+     * @param string A string to search within.
+     */
+    [Symbol.match](string: string): RegExpMatchArray | null;
+
+    /**
+     * Replaces text in a string, using this regular expression.
+     * @param string A String object or string literal whose contents matching against
+     *               this regular expression will be replaced
+     * @param replaceValue A String object or string literal containing the text to replace for every
+     *                     successful match of this regular expression.
+     */
+    [Symbol.replace](string: string, replaceValue: string): string;
+
+    /**
+     * Replaces text in a string, using this regular expression.
+     * @param string A String object or string literal whose contents matching against
+     *               this regular expression will be replaced
+     * @param replacer A function that returns the replacement text.
+     */
+    [Symbol.replace](string: string, replacer: (substring: string, ...args: any[]) => string): string;
+
+    /**
+     * Finds the position beginning first substring match in a regular expression search
+     * using this regular expression.
+     *
+     * @param string The string to search within.
+     */
+    [Symbol.search](string: string): number;
+
+    /**
+     * Returns an array of substrings that were delimited by strings in the original input that
+     * match against this regular expression.
+     *
+     * If the regular expression contains capturing parentheses, then each time this
+     * regular expression matches, the results (including any undefined results) of the
+     * capturing parentheses are spliced.
+     *
+     * @param string string value to split
+     * @param limit if not undefined, the output array is truncated so that it contains no more
+     * than 'limit' elements.
+     */
+    [Symbol.split](string: string, limit?: number): string[];
+}
+
+interface RegExpConstructor {
+    [Symbol.species](): RegExpConstructor;
+}
+
+interface String {
+    /**
+     * Matches a string an object that supports being matched against, and returns an array containing the results of that search.
+     * @param matcher An object that supports being matched against.
+     */
+    match(matcher: { [Symbol.match](string: string): RegExpMatchArray | null; }): RegExpMatchArray | null;
+
+    /**
+     * Replaces text in a string, using an object that supports replacement within a string.
+     * @param searchValue A object can search for and replace matches within a string.
+     * @param replaceValue A string containing the text to replace for every successful match of searchValue in this string.
+     */
+    replace(searchValue: { [Symbol.replace](string: string, replaceValue: string): string; }, replaceValue: string): string;
+
+    /**
+     * Replaces text in a string, using an object that supports replacement within a string.
+     * @param searchValue A object can search for and replace matches within a string.
+     * @param replacer A function that returns the replacement text.
+     */
+    replace(searchValue: { [Symbol.replace](string: string, replacer: (substring: string, ...args: any[]) => string): string; }, replacer: (substring: string, ...args: any[]) => string): string;
+
+    /**
+     * Finds the first substring match in a regular expression search.
+     * @param searcher An object which supports searching within a string.
+     */
+    search(searcher: { [Symbol.search](string: string): number; }): number;
+
+    /**
+     * Split a string into substrings using the specified separator and return them as an array.
+     * @param splitter An object that can split a string.
+     * @param limit A value used to limit the number of elements returned in the array.
+     */
+    split(splitter: { [Symbol.split](string: string, limit?: number): string[]; }, limit?: number): string[];
+}
+
+/**
+ * Represents a raw buffer of binary data, which is used to store data for the
+ * different typed arrays. ArrayBuffers cannot be read from or written to directly,
+ * but can be passed to a typed array or DataView Object to interpret the raw
+ * buffer as needed.
+ */
+interface ArrayBuffer {
+    readonly [Symbol.toStringTag]: "ArrayBuffer";
+}
+
+interface DataView {
+    readonly [Symbol.toStringTag]: "DataView";
+}
+
+/**
+ * A typed array of 8-bit integer values. The contents are initialized to 0. If the requested
+ * number of bytes could not be allocated an exception is raised.
+ */
+interface Int8Array {
+    readonly [Symbol.toStringTag]: "Int8Array";
+}
+
+/**
+ * A typed array of 8-bit unsigned integer values. The contents are initialized to 0. If the
+ * requested number of bytes could not be allocated an exception is raised.
+ */
+interface Uint8Array {
+    readonly [Symbol.toStringTag]: "UInt8Array";
+}
+
+/**
+ * A typed array of 8-bit unsigned integer (clamped) values. The contents are initialized to 0.
+ * If the requested number of bytes could not be allocated an exception is raised.
+ */
+interface Uint8ClampedArray {
+    readonly [Symbol.toStringTag]: "Uint8ClampedArray";
+}
+
+/**
+ * A typed array of 16-bit signed integer values. The contents are initialized to 0. If the
+ * requested number of bytes could not be allocated an exception is raised.
+ */
+interface Int16Array {
+    readonly [Symbol.toStringTag]: "Int16Array";
+}
+
+/**
+ * A typed array of 16-bit unsigned integer values. The contents are initialized to 0. If the
+ * requested number of bytes could not be allocated an exception is raised.
+ */
+interface Uint16Array {
+    readonly [Symbol.toStringTag]: "Uint16Array";
+}
+
+/**
+ * A typed array of 32-bit signed integer values. The contents are initialized to 0. If the
+ * requested number of bytes could not be allocated an exception is raised.
+ */
+interface Int32Array {
+    readonly [Symbol.toStringTag]: "Int32Array";
+}
+
+/**
+ * A typed array of 32-bit unsigned integer values. The contents are initialized to 0. If the
+ * requested number of bytes could not be allocated an exception is raised.
+ */
+interface Uint32Array {
+    readonly [Symbol.toStringTag]: "Uint32Array";
+}
+
+/**
+ * A typed array of 32-bit float values. The contents are initialized to 0. If the requested number
+ * of bytes could not be allocated an exception is raised.
+ */
+interface Float32Array {
+    readonly [Symbol.toStringTag]: "Float32Array";
+}
+
+/**
+ * A typed array of 64-bit float values. The contents are initialized to 0. If the requested
+ * number of bytes could not be allocated an exception is raised.
+ */
+interface Float64Array {
+    readonly [Symbol.toStringTag]: "Float64Array";
+}
+
+
+
+/////////////////////////////
+/// DOM APIs
+/////////////////////////////
+
+interface Account {
+    displayName?: string;
+    id?: string;
+    imageURL?: string;
+    name?: string;
+    rpDisplayName?: string;
+}
+
+interface Algorithm {
+    name: string;
+}
+
+interface AnimationEventInit extends EventInit {
+    animationName?: string;
+    elapsedTime?: number;
+}
+
+interface AssertionOptions {
+    allowList?: ScopedCredentialDescriptor[];
+    extensions?: WebAuthnExtensions;
+    rpId?: USVString;
+    timeoutSeconds?: number;
+}
+
+interface CacheQueryOptions {
+    cacheName?: string;
+    ignoreMethod?: boolean;
+    ignoreSearch?: boolean;
+    ignoreVary?: boolean;
+}
+
+interface ClientData {
+    challenge?: string;
+    extensions?: WebAuthnExtensions;
+    hashAlg?: string | Algorithm;
+    origin?: string;
+    rpId?: string;
+    tokenBinding?: string;
+}
+
+interface CloseEventInit extends EventInit {
+    code?: number;
+    reason?: string;
+    wasClean?: boolean;
+}
+
+interface CompositionEventInit extends UIEventInit {
+    data?: string;
+}
+
+interface ConfirmSiteSpecificExceptionsInformation extends ExceptionInformation {
+    arrayOfDomainStrings?: string[];
+}
+
+interface ConstrainBooleanParameters {
+    exact?: boolean;
+    ideal?: boolean;
+}
+
+interface ConstrainDOMStringParameters {
+    exact?: string | string[];
+    ideal?: string | string[];
+}
+
+interface ConstrainDoubleRange extends DoubleRange {
+    exact?: number;
+    ideal?: number;
+}
+
+interface ConstrainLongRange extends LongRange {
+    exact?: number;
+    ideal?: number;
+}
+
+interface ConstrainVideoFacingModeParameters {
+    exact?: VideoFacingModeEnum | VideoFacingModeEnum[];
+    ideal?: VideoFacingModeEnum | VideoFacingModeEnum[];
+}
+
+interface CustomEventInit extends EventInit {
+    detail?: any;
+}
+
+interface DeviceAccelerationDict {
+    x?: number;
+    y?: number;
+    z?: number;
+}
+
+interface DeviceLightEventInit extends EventInit {
+    value?: number;
+}
+
+interface DeviceMotionEventInit extends EventInit {
+    acceleration?: DeviceAccelerationDict;
+    accelerationIncludingGravity?: DeviceAccelerationDict;
+    interval?: number;
+    rotationRate?: DeviceRotationRateDict;
+}
+
+interface DeviceOrientationEventInit extends EventInit {
+    absolute?: boolean;
+    alpha?: number;
+    beta?: number;
+    gamma?: number;
+}
+
+interface DeviceRotationRateDict {
+    alpha?: number;
+    beta?: number;
+    gamma?: number;
+}
+
+interface DOMRectInit {
+    height?: any;
+    width?: any;
+    x?: any;
+    y?: any;
+}
+
+interface DoubleRange {
+    max?: number;
+    min?: number;
+}
+
+interface ErrorEventInit extends EventInit {
+    colno?: number;
+    error?: any;
+    filename?: string;
+    lineno?: number;
+    message?: string;
+}
+
+interface EventInit {
+    scoped?: boolean;
+    bubbles?: boolean;
+    cancelable?: boolean;
+}
+
+interface EventModifierInit extends UIEventInit {
+    altKey?: boolean;
+    ctrlKey?: boolean;
+    metaKey?: boolean;
+    modifierAltGraph?: boolean;
+    modifierCapsLock?: boolean;
+    modifierFn?: boolean;
+    modifierFnLock?: boolean;
+    modifierHyper?: boolean;
+    modifierNumLock?: boolean;
+    modifierOS?: boolean;
+    modifierScrollLock?: boolean;
+    modifierSuper?: boolean;
+    modifierSymbol?: boolean;
+    modifierSymbolLock?: boolean;
+    shiftKey?: boolean;
+}
+
+interface ExceptionInformation {
+    domain?: string;
+}
+
+interface FocusEventInit extends UIEventInit {
+    relatedTarget?: EventTarget;
+}
+
+interface FocusNavigationEventInit extends EventInit {
+    navigationReason?: string;
+    originHeight?: number;
+    originLeft?: number;
+    originTop?: number;
+    originWidth?: number;
+}
+
+interface FocusNavigationOrigin {
+    originHeight?: number;
+    originLeft?: number;
+    originTop?: number;
+    originWidth?: number;
+}
+
+interface GamepadEventInit extends EventInit {
+    gamepad?: Gamepad;
+}
+
+interface GetNotificationOptions {
+    tag?: string;
+}
+
+interface HashChangeEventInit extends EventInit {
+    newURL?: string;
+    oldURL?: string;
+}
+
+interface IDBIndexParameters {
+    multiEntry?: boolean;
+    unique?: boolean;
+}
+
+interface IDBObjectStoreParameters {
+    autoIncrement?: boolean;
+    keyPath?: IDBKeyPath;
+}
+
+interface IntersectionObserverEntryInit {
+    boundingClientRect?: DOMRectInit;
+    intersectionRect?: DOMRectInit;
+    rootBounds?: DOMRectInit;
+    target?: Element;
+    time?: number;
+}
+
+interface IntersectionObserverInit {
+    root?: Element;
+    rootMargin?: string;
+    threshold?: number | number[];
+}
+
+interface KeyAlgorithm {
+    name?: string;
+}
+
+interface KeyboardEventInit extends EventModifierInit {
+    code?: string;
+    key?: string;
+    location?: number;
+    repeat?: boolean;
+}
+
+interface LongRange {
+    max?: number;
+    min?: number;
+}
+
+interface MediaEncryptedEventInit extends EventInit {
+    initData?: ArrayBuffer;
+    initDataType?: string;
+}
+
+interface MediaKeyMessageEventInit extends EventInit {
+    message?: ArrayBuffer;
+    messageType?: MediaKeyMessageType;
+}
+
+interface MediaKeySystemConfiguration {
+    audioCapabilities?: MediaKeySystemMediaCapability[];
+    distinctiveIdentifier?: MediaKeysRequirement;
+    initDataTypes?: string[];
+    persistentState?: MediaKeysRequirement;
+    videoCapabilities?: MediaKeySystemMediaCapability[];
+}
+
+interface MediaKeySystemMediaCapability {
+    contentType?: string;
+    robustness?: string;
+}
+
+interface MediaStreamConstraints {
+    audio?: boolean | MediaTrackConstraints;
+    video?: boolean | MediaTrackConstraints;
+}
+
+interface MediaStreamErrorEventInit extends EventInit {
+    error?: MediaStreamError;
+}
+
+interface MediaStreamEventInit extends EventInit {
+    stream?: MediaStream;
+}
+
+interface MediaStreamTrackEventInit extends EventInit {
+    track?: MediaStreamTrack;
+}
+
+interface MediaTrackCapabilities {
+    aspectRatio?: number | DoubleRange;
+    deviceId?: string;
+    echoCancellation?: boolean[];
+    facingMode?: string;
+    frameRate?: number | DoubleRange;
+    groupId?: string;
+    height?: number | LongRange;
+    sampleRate?: number | LongRange;
+    sampleSize?: number | LongRange;
+    volume?: number | DoubleRange;
+    width?: number | LongRange;
+}
+
+interface MediaTrackConstraints extends MediaTrackConstraintSet {
+    advanced?: MediaTrackConstraintSet[];
+}
+
+interface MediaTrackConstraintSet {
+    aspectRatio?: number | ConstrainDoubleRange;
+    deviceId?: string | string[] | ConstrainDOMStringParameters;
+    echoCancelation?: boolean | ConstrainBooleanParameters;
+    facingMode?: string | string[] | ConstrainDOMStringParameters;
+    frameRate?: number | ConstrainDoubleRange;
+    groupId?: string | string[] | ConstrainDOMStringParameters;
+    height?: number | ConstrainLongRange;
+    sampleRate?: number | ConstrainLongRange;
+    sampleSize?: number | ConstrainLongRange;
+    volume?: number | ConstrainDoubleRange;
+    width?: number | ConstrainLongRange;
+}
+
+interface MediaTrackSettings {
+    aspectRatio?: number;
+    deviceId?: string;
+    echoCancellation?: boolean;
+    facingMode?: string;
+    frameRate?: number;
+    groupId?: string;
+    height?: number;
+    sampleRate?: number;
+    sampleSize?: number;
+    volume?: number;
+    width?: number;
+}
+
+interface MediaTrackSupportedConstraints {
+    aspectRatio?: boolean;
+    deviceId?: boolean;
+    echoCancellation?: boolean;
+    facingMode?: boolean;
+    frameRate?: boolean;
+    groupId?: boolean;
+    height?: boolean;
+    sampleRate?: boolean;
+    sampleSize?: boolean;
+    volume?: boolean;
+    width?: boolean;
+}
+
+interface MessageEventInit extends EventInit {
+    lastEventId?: string;
+    channel?: string;
+    data?: any;
+    origin?: string;
+    ports?: MessagePort[];
+    source?: Window;
+}
+
+interface MouseEventInit extends EventModifierInit {
+    button?: number;
+    buttons?: number;
+    clientX?: number;
+    clientY?: number;
+    relatedTarget?: EventTarget;
+    screenX?: number;
+    screenY?: number;
+}
+
+interface MSAccountInfo {
+    accountImageUri?: string;
+    accountName?: string;
+    rpDisplayName?: string;
+    userDisplayName?: string;
+    userId?: string;
+}
+
+interface MSAudioLocalClientEvent extends MSLocalClientEventBase {
+    cpuInsufficientEventRatio?: number;
+    deviceCaptureNotFunctioningEventRatio?: number;
+    deviceClippingEventRatio?: number;
+    deviceEchoEventRatio?: number;
+    deviceGlitchesEventRatio?: number;
+    deviceHalfDuplexAECEventRatio?: number;
+    deviceHowlingEventCount?: number;
+    deviceLowSNREventRatio?: number;
+    deviceLowSpeechLevelEventRatio?: number;
+    deviceMultipleEndpointsEventCount?: number;
+    deviceNearEndToEchoRatioEventRatio?: number;
+    deviceRenderMuteEventRatio?: number;
+    deviceRenderNotFunctioningEventRatio?: number;
+    deviceRenderZeroVolumeEventRatio?: number;
+    networkDelayEventRatio?: number;
+    networkSendQualityEventRatio?: number;
+}
+
+interface MSAudioRecvPayload extends MSPayloadBase {
+    burstLossLength1?: number;
+    burstLossLength2?: number;
+    burstLossLength3?: number;
+    burstLossLength4?: number;
+    burstLossLength5?: number;
+    burstLossLength6?: number;
+    burstLossLength7?: number;
+    burstLossLength8OrHigher?: number;
+    fecRecvDistance1?: number;
+    fecRecvDistance2?: number;
+    fecRecvDistance3?: number;
+    packetReorderDepthAvg?: number;
+    packetReorderDepthMax?: number;
+    packetReorderRatio?: number;
+    ratioCompressedSamplesAvg?: number;
+    ratioConcealedSamplesAvg?: number;
+    ratioStretchedSamplesAvg?: number;
+    samplingRate?: number;
+    signal?: MSAudioRecvSignal;
+}
+
+interface MSAudioRecvSignal {
+    initialSignalLevelRMS?: number;
+    recvNoiseLevelCh1?: number;
+    recvSignalLevelCh1?: number;
+    renderLoopbackSignalLevel?: number;
+    renderNoiseLevel?: number;
+    renderSignalLevel?: number;
+}
+
+interface MSAudioSendPayload extends MSPayloadBase {
+    audioFECUsed?: boolean;
+    samplingRate?: number;
+    sendMutePercent?: number;
+    signal?: MSAudioSendSignal;
+}
+
+interface MSAudioSendSignal {
+    noiseLevel?: number;
+    sendNoiseLevelCh1?: number;
+    sendSignalLevelCh1?: number;
+}
+
+interface MSConnectivity {
+    iceType?: MSIceType;
+    iceWarningFlags?: MSIceWarningFlags;
+    relayAddress?: MSRelayAddress;
+}
+
+interface MSCredentialFilter {
+    accept?: MSCredentialSpec[];
+}
+
+interface MSCredentialParameters {
+    type?: MSCredentialType;
+}
+
+interface MSCredentialSpec {
+    id?: string;
+    type?: MSCredentialType;
+}
+
+interface MSDelay {
+    roundTrip?: number;
+    roundTripMax?: number;
+}
+
+interface MSDescription extends RTCStats {
+    connectivity?: MSConnectivity;
+    deviceDevName?: string;
+    localAddr?: MSIPAddressInfo;
+    networkconnectivity?: MSNetworkConnectivityInfo;
+    reflexiveLocalIPAddr?: MSIPAddressInfo;
+    remoteAddr?: MSIPAddressInfo;
+    transport?: RTCIceProtocol;
+}
+
+interface MSFIDOCredentialParameters extends MSCredentialParameters {
+    algorithm?: string | Algorithm;
+    authenticators?: AAGUID[];
+}
+
+interface MSIceWarningFlags {
+    allocationMessageIntegrityFailed?: boolean;
+    alternateServerReceived?: boolean;
+    connCheckMessageIntegrityFailed?: boolean;
+    connCheckOtherError?: boolean;
+    fipsAllocationFailure?: boolean;
+    multipleRelayServersAttempted?: boolean;
+    noRelayServersConfigured?: boolean;
+    portRangeExhausted?: boolean;
+    pseudoTLSFailure?: boolean;
+    tcpNatConnectivityFailed?: boolean;
+    tcpRelayConnectivityFailed?: boolean;
+    turnAuthUnknownUsernameError?: boolean;
+    turnTcpAllocateFailed?: boolean;
+    turnTcpSendFailed?: boolean;
+    turnTcpTimedOut?: boolean;
+    turnTurnTcpConnectivityFailed?: boolean;
+    turnUdpAllocateFailed?: boolean;
+    turnUdpSendFailed?: boolean;
+    udpLocalConnectivityFailed?: boolean;
+    udpNatConnectivityFailed?: boolean;
+    udpRelayConnectivityFailed?: boolean;
+    useCandidateChecksFailed?: boolean;
+}
+
+interface MSIPAddressInfo {
+    ipAddr?: string;
+    manufacturerMacAddrMask?: string;
+    port?: number;
+}
+
+interface MSJitter {
+    interArrival?: number;
+    interArrivalMax?: number;
+    interArrivalSD?: number;
+}
+
+interface MSLocalClientEventBase extends RTCStats {
+    networkBandwidthLowEventRatio?: number;
+    networkReceiveQualityEventRatio?: number;
+}
+
+interface MSNetwork extends RTCStats {
+    delay?: MSDelay;
+    jitter?: MSJitter;
+    packetLoss?: MSPacketLoss;
+    utilization?: MSUtilization;
+}
+
+interface MSNetworkConnectivityInfo {
+    linkspeed?: number;
+    networkConnectionDetails?: string;
+    vpn?: boolean;
+}
+
+interface MSNetworkInterfaceType {
+    interfaceTypeEthernet?: boolean;
+    interfaceTypePPP?: boolean;
+    interfaceTypeTunnel?: boolean;
+    interfaceTypeWireless?: boolean;
+    interfaceTypeWWAN?: boolean;
+}
+
+interface MSOutboundNetwork extends MSNetwork {
+    appliedBandwidthLimit?: number;
+}
+
+interface MSPacketLoss {
+    lossRate?: number;
+    lossRateMax?: number;
+}
+
+interface MSPayloadBase extends RTCStats {
+    payloadDescription?: string;
+}
+
+interface MSPortRange {
+    max?: number;
+    min?: number;
+}
+
+interface MSRelayAddress {
+    port?: number;
+    relayAddress?: string;
+}
+
+interface MSSignatureParameters {
+    userPrompt?: string;
+}
+
+interface MSTransportDiagnosticsStats extends RTCStats {
+    allocationTimeInMs?: number;
+    baseAddress?: string;
+    baseInterface?: MSNetworkInterfaceType;
+    iceRole?: RTCIceRole;
+    iceWarningFlags?: MSIceWarningFlags;
+    interfaces?: MSNetworkInterfaceType;
+    localAddress?: string;
+    localAddrType?: MSIceAddrType;
+    localInterface?: MSNetworkInterfaceType;
+    localMR?: string;
+    localMRTCPPort?: number;
+    localSite?: string;
+    msRtcEngineVersion?: string;
+    networkName?: string;
+    numConsentReqReceived?: number;
+    numConsentReqSent?: number;
+    numConsentRespReceived?: number;
+    numConsentRespSent?: number;
+    portRangeMax?: number;
+    portRangeMin?: number;
+    protocol?: RTCIceProtocol;
+    remoteAddress?: string;
+    remoteAddrType?: MSIceAddrType;
+    remoteMR?: string;
+    remoteMRTCPPort?: number;
+    remoteSite?: string;
+    rtpRtcpMux?: boolean;
+    stunVer?: number;
+}
+
+interface MSUtilization {
+    bandwidthEstimation?: number;
+    bandwidthEstimationAvg?: number;
+    bandwidthEstimationMax?: number;
+    bandwidthEstimationMin?: number;
+    bandwidthEstimationStdDev?: number;
+    packets?: number;
+}
+
+interface MSVideoPayload extends MSPayloadBase {
+    durationSeconds?: number;
+    resolution?: string;
+    videoBitRateAvg?: number;
+    videoBitRateMax?: number;
+    videoFrameRateAvg?: number;
+    videoPacketLossRate?: number;
+}
+
+interface MSVideoRecvPayload extends MSVideoPayload {
+    lowBitRateCallPercent?: number;
+    lowFrameRateCallPercent?: number;
+    recvBitRateAverage?: number;
+    recvBitRateMaximum?: number;
+    recvCodecType?: string;
+    recvFpsHarmonicAverage?: number;
+    recvFrameRateAverage?: number;
+    recvNumResSwitches?: number;
+    recvReorderBufferMaxSuccessfullyOrderedExtent?: number;
+    recvReorderBufferMaxSuccessfullyOrderedLateTime?: number;
+    recvReorderBufferPacketsDroppedDueToBufferExhaustion?: number;
+    recvReorderBufferPacketsDroppedDueToTimeout?: number;
+    recvReorderBufferReorderedPackets?: number;
+    recvResolutionHeight?: number;
+    recvResolutionWidth?: number;
+    recvVideoStreamsMax?: number;
+    recvVideoStreamsMin?: number;
+    recvVideoStreamsMode?: number;
+    reorderBufferTotalPackets?: number;
+    videoFrameLossRate?: number;
+    videoPostFECPLR?: number;
+    videoResolutions?: MSVideoResolutionDistribution;
+}
+
+interface MSVideoResolutionDistribution {
+    cifQuality?: number;
+    h1080Quality?: number;
+    h1440Quality?: number;
+    h2160Quality?: number;
+    h720Quality?: number;
+    vgaQuality?: number;
+}
+
+interface MSVideoSendPayload extends MSVideoPayload {
+    sendBitRateAverage?: number;
+    sendBitRateMaximum?: number;
+    sendFrameRateAverage?: number;
+    sendResolutionHeight?: number;
+    sendResolutionWidth?: number;
+    sendVideoStreamsMax?: number;
+}
+
+interface MsZoomToOptions {
+    animate?: string;
+    contentX?: number;
+    contentY?: number;
+    scaleFactor?: number;
+    viewportX?: string;
+    viewportY?: string;
+}
+
+interface MutationObserverInit {
+    attributeFilter?: string[];
+    attributeOldValue?: boolean;
+    attributes?: boolean;
+    characterData?: boolean;
+    characterDataOldValue?: boolean;
+    childList?: boolean;
+    subtree?: boolean;
+}
+
+interface NotificationOptions {
+    body?: string;
+    dir?: NotificationDirection;
+    icon?: string;
+    lang?: string;
+    tag?: string;
+}
+
+interface ObjectURLOptions {
+    oneTimeOnly?: boolean;
+}
+
+interface PaymentCurrencyAmount {
+    currency?: string;
+    currencySystem?: string;
+    value?: string;
+}
+
+interface PaymentDetails {
+    displayItems?: PaymentItem[];
+    error?: string;
+    modifiers?: PaymentDetailsModifier[];
+    shippingOptions?: PaymentShippingOption[];
+    total?: PaymentItem;
+}
+
+interface PaymentDetailsModifier {
+    additionalDisplayItems?: PaymentItem[];
+    data?: any;
+    supportedMethods?: string[];
+    total?: PaymentItem;
+}
+
+interface PaymentItem {
+    amount?: PaymentCurrencyAmount;
+    label?: string;
+    pending?: boolean;
+}
+
+interface PaymentMethodData {
+    data?: any;
+    supportedMethods?: string[];
+}
+
+interface PaymentOptions {
+    requestPayerEmail?: boolean;
+    requestPayerName?: boolean;
+    requestPayerPhone?: boolean;
+    requestShipping?: boolean;
+    shippingType?: string;
+}
+
+interface PaymentRequestUpdateEventInit extends EventInit {
+}
+
+interface PaymentShippingOption {
+    amount?: PaymentCurrencyAmount;
+    id?: string;
+    label?: string;
+    selected?: boolean;
+}
+
+interface PeriodicWaveConstraints {
+    disableNormalization?: boolean;
+}
+
+interface PointerEventInit extends MouseEventInit {
+    height?: number;
+    isPrimary?: boolean;
+    pointerId?: number;
+    pointerType?: string;
+    pressure?: number;
+    tiltX?: number;
+    tiltY?: number;
+    width?: number;
+}
+
+interface PopStateEventInit extends EventInit {
+    state?: any;
+}
+
+interface PositionOptions {
+    enableHighAccuracy?: boolean;
+    maximumAge?: number;
+    timeout?: number;
+}
+
+interface ProgressEventInit extends EventInit {
+    lengthComputable?: boolean;
+    loaded?: number;
+    total?: number;
+}
+
+interface PushSubscriptionOptionsInit {
+    applicationServerKey?: any;
+    userVisibleOnly?: boolean;
+}
+
+interface RegistrationOptions {
+    scope?: string;
+}
+
+interface RequestInit {
+    body?: any;
+    cache?: RequestCache;
+    credentials?: RequestCredentials;
+    headers?: any;
+    integrity?: string;
+    keepalive?: boolean;
+    method?: string;
+    mode?: RequestMode;
+    redirect?: RequestRedirect;
+    referrer?: string;
+    referrerPolicy?: ReferrerPolicy;
+    window?: any;
+}
+
+interface ResponseInit {
+    headers?: any;
+    status?: number;
+    statusText?: string;
+}
+
+interface RTCConfiguration {
+    bundlePolicy?: RTCBundlePolicy;
+    iceServers?: RTCIceServer[];
+    iceTransportPolicy?: RTCIceTransportPolicy;
+    peerIdentity?: string;
+}
+
+interface RTCDtlsFingerprint {
+    algorithm?: string;
+    value?: string;
+}
+
+interface RTCDtlsParameters {
+    fingerprints?: RTCDtlsFingerprint[];
+    role?: RTCDtlsRole;
+}
+
+interface RTCDTMFToneChangeEventInit extends EventInit {
+    tone?: string;
+}
+
+interface RTCIceCandidateAttributes extends RTCStats {
+    addressSourceUrl?: string;
+    candidateType?: RTCStatsIceCandidateType;
+    ipAddress?: string;
+    portNumber?: number;
+    priority?: number;
+    transport?: string;
+}
+
+interface RTCIceCandidateComplete {
+}
+
+interface RTCIceCandidateDictionary {
+    foundation?: string;
+    ip?: string;
+    msMTurnSessionId?: string;
+    port?: number;
+    priority?: number;
+    protocol?: RTCIceProtocol;
+    relatedAddress?: string;
+    relatedPort?: number;
+    tcpType?: RTCIceTcpCandidateType;
+    type?: RTCIceCandidateType;
+}
+
+interface RTCIceCandidateInit {
+    candidate?: string;
+    sdpMid?: string;
+    sdpMLineIndex?: number;
+}
+
+interface RTCIceCandidatePair {
+    local?: RTCIceCandidateDictionary;
+    remote?: RTCIceCandidateDictionary;
+}
+
+interface RTCIceCandidatePairStats extends RTCStats {
+    availableIncomingBitrate?: number;
+    availableOutgoingBitrate?: number;
+    bytesReceived?: number;
+    bytesSent?: number;
+    localCandidateId?: string;
+    nominated?: boolean;
+    priority?: number;
+    readable?: boolean;
+    remoteCandidateId?: string;
+    roundTripTime?: number;
+    state?: RTCStatsIceCandidatePairState;
+    transportId?: string;
+    writable?: boolean;
+}
+
+interface RTCIceGatherOptions {
+    gatherPolicy?: RTCIceGatherPolicy;
+    iceservers?: RTCIceServer[];
+    portRange?: MSPortRange;
+}
+
+interface RTCIceParameters {
+    iceLite?: boolean;
+    password?: string;
+    usernameFragment?: string;
+}
+
+interface RTCIceServer {
+    credential?: string;
+    urls?: any;
+    username?: string;
+}
+
+interface RTCInboundRTPStreamStats extends RTCRTPStreamStats {
+    bytesReceived?: number;
+    fractionLost?: number;
+    jitter?: number;
+    packetsLost?: number;
+    packetsReceived?: number;
+}
+
+interface RTCMediaStreamTrackStats extends RTCStats {
+    audioLevel?: number;
+    echoReturnLoss?: number;
+    echoReturnLossEnhancement?: number;
+    frameHeight?: number;
+    framesCorrupted?: number;
+    framesDecoded?: number;
+    framesDropped?: number;
+    framesPerSecond?: number;
+    framesReceived?: number;
+    framesSent?: number;
+    frameWidth?: number;
+    remoteSource?: boolean;
+    ssrcIds?: string[];
+    trackIdentifier?: string;
+}
+
+interface RTCOfferOptions {
+    iceRestart?: boolean;
+    offerToReceiveAudio?: number;
+    offerToReceiveVideo?: number;
+    voiceActivityDetection?: boolean;
+}
+
+interface RTCOutboundRTPStreamStats extends RTCRTPStreamStats {
+    bytesSent?: number;
+    packetsSent?: number;
+    roundTripTime?: number;
+    targetBitrate?: number;
+}
+
+interface RTCPeerConnectionIceEventInit extends EventInit {
+    candidate?: RTCIceCandidate;
+}
+
+interface RTCRtcpFeedback {
+    parameter?: string;
+    type?: string;
+}
+
+interface RTCRtcpParameters {
+    cname?: string;
+    mux?: boolean;
+    reducedSize?: boolean;
+    ssrc?: number;
+}
+
+interface RTCRtpCapabilities {
+    codecs?: RTCRtpCodecCapability[];
+    fecMechanisms?: string[];
+    headerExtensions?: RTCRtpHeaderExtension[];
+}
+
+interface RTCRtpCodecCapability {
+    clockRate?: number;
+    kind?: string;
+    maxptime?: number;
+    maxSpatialLayers?: number;
+    maxTemporalLayers?: number;
+    name?: string;
+    numChannels?: number;
+    options?: any;
+    parameters?: any;
+    preferredPayloadType?: number;
+    ptime?: number;
+    rtcpFeedback?: RTCRtcpFeedback[];
+    svcMultiStreamSupport?: boolean;
+}
+
+interface RTCRtpCodecParameters {
+    clockRate?: number;
+    maxptime?: number;
+    name?: string;
+    numChannels?: number;
+    parameters?: any;
+    payloadType?: any;
+    ptime?: number;
+    rtcpFeedback?: RTCRtcpFeedback[];
+}
+
+interface RTCRtpContributingSource {
+    audioLevel?: number;
+    csrc?: number;
+    timestamp?: number;
+}
+
+interface RTCRtpEncodingParameters {
+    active?: boolean;
+    codecPayloadType?: number;
+    dependencyEncodingIds?: string[];
+    encodingId?: string;
+    fec?: RTCRtpFecParameters;
+    framerateScale?: number;
+    maxBitrate?: number;
+    maxFramerate?: number;
+    minQuality?: number;
+    priority?: number;
+    resolutionScale?: number;
+    rtx?: RTCRtpRtxParameters;
+    ssrc?: number;
+    ssrcRange?: RTCSsrcRange;
+}
+
+interface RTCRtpFecParameters {
+    mechanism?: string;
+    ssrc?: number;
+}
+
+interface RTCRtpHeaderExtension {
+    kind?: string;
+    preferredEncrypt?: boolean;
+    preferredId?: number;
+    uri?: string;
+}
+
+interface RTCRtpHeaderExtensionParameters {
+    encrypt?: boolean;
+    id?: number;
+    uri?: string;
+}
+
+interface RTCRtpParameters {
+    codecs?: RTCRtpCodecParameters[];
+    degradationPreference?: RTCDegradationPreference;
+    encodings?: RTCRtpEncodingParameters[];
+    headerExtensions?: RTCRtpHeaderExtensionParameters[];
+    muxId?: string;
+    rtcp?: RTCRtcpParameters;
+}
+
+interface RTCRtpRtxParameters {
+    ssrc?: number;
+}
+
+interface RTCRTPStreamStats extends RTCStats {
+    associateStatsId?: string;
+    codecId?: string;
+    firCount?: number;
+    isRemote?: boolean;
+    mediaTrackId?: string;
+    nackCount?: number;
+    pliCount?: number;
+    sliCount?: number;
+    ssrc?: string;
+    transportId?: string;
+}
+
+interface RTCRtpUnhandled {
+    muxId?: string;
+    payloadType?: number;
+    ssrc?: number;
+}
+
+interface RTCSessionDescriptionInit {
+    sdp?: string;
+    type?: RTCSdpType;
+}
+
+interface RTCSrtpKeyParam {
+    keyMethod?: string;
+    keySalt?: string;
+    lifetime?: string;
+    mkiLength?: number;
+    mkiValue?: number;
+}
+
+interface RTCSrtpSdesParameters {
+    cryptoSuite?: string;
+    keyParams?: RTCSrtpKeyParam[];
+    sessionParams?: string[];
+    tag?: number;
+}
+
+interface RTCSsrcRange {
+    max?: number;
+    min?: number;
+}
+
+interface RTCStats {
+    id?: string;
+    msType?: MSStatsType;
+    timestamp?: number;
+    type?: RTCStatsType;
+}
+
+interface RTCStatsReport {
+}
+
+interface RTCTransportStats extends RTCStats {
+    activeConnection?: boolean;
+    bytesReceived?: number;
+    bytesSent?: number;
+    localCertificateId?: string;
+    remoteCertificateId?: string;
+    rtcpTransportStatsId?: string;
+    selectedCandidatePairId?: string;
+}
+
+interface ScopedCredentialDescriptor {
+    id?: any;
+    transports?: Transport[];
+    type?: ScopedCredentialType;
+}
+
+interface ScopedCredentialOptions {
+    excludeList?: ScopedCredentialDescriptor[];
+    extensions?: WebAuthnExtensions;
+    rpId?: USVString;
+    timeoutSeconds?: number;
+}
+
+interface ScopedCredentialParameters {
+    algorithm?: string | Algorithm;
+    type?: ScopedCredentialType;
+}
+
+interface ServiceWorkerMessageEventInit extends EventInit {
+    data?: any;
+    lastEventId?: string;
+    origin?: string;
+    ports?: MessagePort[];
+    source?: ServiceWorker | MessagePort;
+}
+
+interface SpeechSynthesisEventInit extends EventInit {
+    charIndex?: number;
+    elapsedTime?: number;
+    name?: string;
+    utterance?: SpeechSynthesisUtterance;
+}
+
+interface StoreExceptionsInformation extends ExceptionInformation {
+    detailURI?: string;
+    explanationString?: string;
+    siteName?: string;
+}
+
+interface StoreSiteSpecificExceptionsInformation extends StoreExceptionsInformation {
+    arrayOfDomainStrings?: string[];
+}
+
+interface TrackEventInit extends EventInit {
+    track?: VideoTrack | AudioTrack | TextTrack;
+}
+
+interface TransitionEventInit extends EventInit {
+    elapsedTime?: number;
+    propertyName?: string;
+}
+
+interface UIEventInit extends EventInit {
+    detail?: number;
+    view?: Window;
+}
+
+interface WebAuthnExtensions {
+}
+
+interface WebGLContextAttributes {
+    failIfMajorPerformanceCaveat?: boolean;
+    alpha?: boolean;
+    antialias?: boolean;
+    depth?: boolean;
+    premultipliedAlpha?: boolean;
+    preserveDrawingBuffer?: boolean;
+    stencil?: boolean;
+}
+
+interface WebGLContextEventInit extends EventInit {
+    statusMessage?: string;
+}
+
+interface WheelEventInit extends MouseEventInit {
+    deltaMode?: number;
+    deltaX?: number;
+    deltaY?: number;
+    deltaZ?: number;
+}
+
+interface EventListener {
+    (evt: Event): void;
+}
+
+interface WebKitEntriesCallback {
+    (evt: Event): void;
+}
+
+interface WebKitErrorCallback {
+    (evt: Event): void;
+}
+
+interface WebKitFileCallback {
+    (evt: Event): void;
+}
+
+interface AnalyserNode extends AudioNode {
+    fftSize: number;
+    readonly frequencyBinCount: number;
+    maxDecibels: number;
+    minDecibels: number;
+    smoothingTimeConstant: number;
+    getByteFrequencyData(array: Uint8Array): void;
+    getByteTimeDomainData(array: Uint8Array): void;
+    getFloatFrequencyData(array: Float32Array): void;
+    getFloatTimeDomainData(array: Float32Array): void;
+}
+
+declare var AnalyserNode: {
+    prototype: AnalyserNode;
+    new(): AnalyserNode;
+};
+
+interface ANGLE_instanced_arrays {
+    drawArraysInstancedANGLE(mode: number, first: number, count: number, primcount: number): void;
+    drawElementsInstancedANGLE(mode: number, count: number, type: number, offset: number, primcount: number): void;
+    vertexAttribDivisorANGLE(index: number, divisor: number): void;
+    readonly VERTEX_ATTRIB_ARRAY_DIVISOR_ANGLE: number;
+}
+
+declare var ANGLE_instanced_arrays: {
+    prototype: ANGLE_instanced_arrays;
+    new(): ANGLE_instanced_arrays;
+    readonly VERTEX_ATTRIB_ARRAY_DIVISOR_ANGLE: number;
+};
+
+interface AnimationEvent extends Event {
+    readonly animationName: string;
+    readonly elapsedTime: number;
+    initAnimationEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, animationNameArg: string, elapsedTimeArg: number): void;
+}
+
+declare var AnimationEvent: {
+    prototype: AnimationEvent;
+    new(typeArg: string, eventInitDict?: AnimationEventInit): AnimationEvent;
+};
+
+interface ApplicationCacheEventMap {
+    "cached": Event;
+    "checking": Event;
+    "downloading": Event;
+    "error": Event;
+    "noupdate": Event;
+    "obsolete": Event;
+    "progress": ProgressEvent;
+    "updateready": Event;
+}
+
+interface ApplicationCache extends EventTarget {
+    oncached: (this: ApplicationCache, ev: Event) => any;
+    onchecking: (this: ApplicationCache, ev: Event) => any;
+    ondownloading: (this: ApplicationCache, ev: Event) => any;
+    onerror: (this: ApplicationCache, ev: Event) => any;
+    onnoupdate: (this: ApplicationCache, ev: Event) => any;
+    onobsolete: (this: ApplicationCache, ev: Event) => any;
+    onprogress: (this: ApplicationCache, ev: ProgressEvent) => any;
+    onupdateready: (this: ApplicationCache, ev: Event) => any;
+    readonly status: number;
+    abort(): void;
+    swapCache(): void;
+    update(): void;
+    readonly CHECKING: number;
+    readonly DOWNLOADING: number;
+    readonly IDLE: number;
+    readonly OBSOLETE: number;
+    readonly UNCACHED: number;
+    readonly UPDATEREADY: number;
+    addEventListener<K extends keyof ApplicationCacheEventMap>(type: K, listener: (this: ApplicationCache, ev: ApplicationCacheEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var ApplicationCache: {
+    prototype: ApplicationCache;
+    new(): ApplicationCache;
+    readonly CHECKING: number;
+    readonly DOWNLOADING: number;
+    readonly IDLE: number;
+    readonly OBSOLETE: number;
+    readonly UNCACHED: number;
+    readonly UPDATEREADY: number;
+};
+
+interface Attr extends Node {
+    readonly name: string;
+    readonly ownerElement: Element;
+    readonly prefix: string | null;
+    readonly specified: boolean;
+    value: string;
+}
+
+declare var Attr: {
+    prototype: Attr;
+    new(): Attr;
+};
+
+interface AudioBuffer {
+    readonly duration: number;
+    readonly length: number;
+    readonly numberOfChannels: number;
+    readonly sampleRate: number;
+    copyFromChannel(destination: Float32Array, channelNumber: number, startInChannel?: number): void;
+    copyToChannel(source: Float32Array, channelNumber: number, startInChannel?: number): void;
+    getChannelData(channel: number): Float32Array;
+}
+
+declare var AudioBuffer: {
+    prototype: AudioBuffer;
+    new(): AudioBuffer;
+};
+
+interface AudioBufferSourceNodeEventMap {
+    "ended": MediaStreamErrorEvent;
+}
+
+interface AudioBufferSourceNode extends AudioNode {
+    buffer: AudioBuffer | null;
+    readonly detune: AudioParam;
+    loop: boolean;
+    loopEnd: number;
+    loopStart: number;
+    onended: (this: AudioBufferSourceNode, ev: MediaStreamErrorEvent) => any;
+    readonly playbackRate: AudioParam;
+    start(when?: number, offset?: number, duration?: number): void;
+    stop(when?: number): void;
+    addEventListener<K extends keyof AudioBufferSourceNodeEventMap>(type: K, listener: (this: AudioBufferSourceNode, ev: AudioBufferSourceNodeEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var AudioBufferSourceNode: {
+    prototype: AudioBufferSourceNode;
+    new(): AudioBufferSourceNode;
+};
+
+interface AudioContextEventMap {
+    "statechange": Event;
+}
+
+interface AudioContextBase extends EventTarget {
+    readonly currentTime: number;
+    readonly destination: AudioDestinationNode;
+    readonly listener: AudioListener;
+    onstatechange: (this: AudioContext, ev: Event) => any;
+    readonly sampleRate: number;
+    readonly state: AudioContextState;
+    close(): Promise<void>;
+    createAnalyser(): AnalyserNode;
+    createBiquadFilter(): BiquadFilterNode;
+    createBuffer(numberOfChannels: number, length: number, sampleRate: number): AudioBuffer;
+    createBufferSource(): AudioBufferSourceNode;
+    createChannelMerger(numberOfInputs?: number): ChannelMergerNode;
+    createChannelSplitter(numberOfOutputs?: number): ChannelSplitterNode;
+    createConvolver(): ConvolverNode;
+    createDelay(maxDelayTime?: number): DelayNode;
+    createDynamicsCompressor(): DynamicsCompressorNode;
+    createGain(): GainNode;
+    createIIRFilter(feedforward: number[], feedback: number[]): IIRFilterNode;
+    createMediaElementSource(mediaElement: HTMLMediaElement): MediaElementAudioSourceNode;
+    createMediaStreamSource(mediaStream: MediaStream): MediaStreamAudioSourceNode;
+    createOscillator(): OscillatorNode;
+    createPanner(): PannerNode;
+    createPeriodicWave(real: Float32Array, imag: Float32Array, constraints?: PeriodicWaveConstraints): PeriodicWave;
+    createScriptProcessor(bufferSize?: number, numberOfInputChannels?: number, numberOfOutputChannels?: number): ScriptProcessorNode;
+    createStereoPanner(): StereoPannerNode;
+    createWaveShaper(): WaveShaperNode;
+    decodeAudioData(audioData: ArrayBuffer, successCallback?: DecodeSuccessCallback, errorCallback?: DecodeErrorCallback): Promise<AudioBuffer>;
+    resume(): Promise<void>;
+    addEventListener<K extends keyof AudioContextEventMap>(type: K, listener: (this: AudioContext, ev: AudioContextEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+interface AudioContext extends AudioContextBase {
+    suspend(): Promise<void>;
+}
+
+declare var AudioContext: {
+    prototype: AudioContext;
+    new(): AudioContext;
+};
+
+interface AudioDestinationNode extends AudioNode {
+    readonly maxChannelCount: number;
+}
+
+declare var AudioDestinationNode: {
+    prototype: AudioDestinationNode;
+    new(): AudioDestinationNode;
+};
+
+interface AudioListener {
+    dopplerFactor: number;
+    speedOfSound: number;
+    setOrientation(x: number, y: number, z: number, xUp: number, yUp: number, zUp: number): void;
+    setPosition(x: number, y: number, z: number): void;
+    setVelocity(x: number, y: number, z: number): void;
+}
+
+declare var AudioListener: {
+    prototype: AudioListener;
+    new(): AudioListener;
+};
+
+interface AudioNode extends EventTarget {
+    channelCount: number;
+    channelCountMode: ChannelCountMode;
+    channelInterpretation: ChannelInterpretation;
+    readonly context: AudioContext;
+    readonly numberOfInputs: number;
+    readonly numberOfOutputs: number;
+    connect(destination: AudioNode, output?: number, input?: number): AudioNode;
+    connect(destination: AudioParam, output?: number): void;
+    disconnect(output?: number): void;
+    disconnect(destination: AudioNode, output?: number, input?: number): void;
+    disconnect(destination: AudioParam, output?: number): void;
+}
+
+declare var AudioNode: {
+    prototype: AudioNode;
+    new(): AudioNode;
+};
+
+interface AudioParam {
+    readonly defaultValue: number;
+    value: number;
+    cancelScheduledValues(startTime: number): AudioParam;
+    exponentialRampToValueAtTime(value: number, endTime: number): AudioParam;
+    linearRampToValueAtTime(value: number, endTime: number): AudioParam;
+    setTargetAtTime(target: number, startTime: number, timeConstant: number): AudioParam;
+    setValueAtTime(value: number, startTime: number): AudioParam;
+    setValueCurveAtTime(values: Float32Array, startTime: number, duration: number): AudioParam;
+}
+
+declare var AudioParam: {
+    prototype: AudioParam;
+    new(): AudioParam;
+};
+
+interface AudioProcessingEvent extends Event {
+    readonly inputBuffer: AudioBuffer;
+    readonly outputBuffer: AudioBuffer;
+    readonly playbackTime: number;
+}
+
+declare var AudioProcessingEvent: {
+    prototype: AudioProcessingEvent;
+    new(): AudioProcessingEvent;
+};
+
+interface AudioTrack {
+    enabled: boolean;
+    readonly id: string;
+    kind: string;
+    readonly label: string;
+    language: string;
+    readonly sourceBuffer: SourceBuffer;
+}
+
+declare var AudioTrack: {
+    prototype: AudioTrack;
+    new(): AudioTrack;
+};
+
+interface AudioTrackListEventMap {
+    "addtrack": TrackEvent;
+    "change": Event;
+    "removetrack": TrackEvent;
+}
+
+interface AudioTrackList extends EventTarget {
+    readonly length: number;
+    onaddtrack: (this: AudioTrackList, ev: TrackEvent) => any;
+    onchange: (this: AudioTrackList, ev: Event) => any;
+    onremovetrack: (this: AudioTrackList, ev: TrackEvent) => any;
+    getTrackById(id: string): AudioTrack | null;
+    item(index: number): AudioTrack;
+    addEventListener<K extends keyof AudioTrackListEventMap>(type: K, listener: (this: AudioTrackList, ev: AudioTrackListEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+    [index: number]: AudioTrack;
+}
+
+declare var AudioTrackList: {
+    prototype: AudioTrackList;
+    new(): AudioTrackList;
+};
+
+interface BarProp {
+    readonly visible: boolean;
+}
+
+declare var BarProp: {
+    prototype: BarProp;
+    new(): BarProp;
+};
+
+interface BeforeUnloadEvent extends Event {
+    returnValue: any;
+}
+
+declare var BeforeUnloadEvent: {
+    prototype: BeforeUnloadEvent;
+    new(): BeforeUnloadEvent;
+};
+
+interface BiquadFilterNode extends AudioNode {
+    readonly detune: AudioParam;
+    readonly frequency: AudioParam;
+    readonly gain: AudioParam;
+    readonly Q: AudioParam;
+    type: BiquadFilterType;
+    getFrequencyResponse(frequencyHz: Float32Array, magResponse: Float32Array, phaseResponse: Float32Array): void;
+}
+
+declare var BiquadFilterNode: {
+    prototype: BiquadFilterNode;
+    new(): BiquadFilterNode;
+};
+
+interface Blob {
+    readonly size: number;
+    readonly type: string;
+    msClose(): void;
+    msDetachStream(): any;
+    slice(start?: number, end?: number, contentType?: string): Blob;
+}
+
+declare var Blob: {
+    prototype: Blob;
+    new (blobParts?: any[], options?: BlobPropertyBag): Blob;
+};
+
+interface Cache {
+    add(request: RequestInfo): Promise<void>;
+    addAll(requests: RequestInfo[]): Promise<void>;
+    delete(request: RequestInfo, options?: CacheQueryOptions): Promise<boolean>;
+    keys(request?: RequestInfo, options?: CacheQueryOptions): any;
+    match(request: RequestInfo, options?: CacheQueryOptions): Promise<Response>;
+    matchAll(request?: RequestInfo, options?: CacheQueryOptions): any;
+    put(request: RequestInfo, response: Response): Promise<void>;
+}
+
+declare var Cache: {
+    prototype: Cache;
+    new(): Cache;
+};
+
+interface CacheStorage {
+    delete(cacheName: string): Promise<boolean>;
+    has(cacheName: string): Promise<boolean>;
+    keys(): any;
+    match(request: RequestInfo, options?: CacheQueryOptions): Promise<any>;
+    open(cacheName: string): Promise<Cache>;
+}
+
+declare var CacheStorage: {
+    prototype: CacheStorage;
+    new(): CacheStorage;
+};
+
+interface CanvasGradient {
+    addColorStop(offset: number, color: string): void;
+}
+
+declare var CanvasGradient: {
+    prototype: CanvasGradient;
+    new(): CanvasGradient;
+};
+
+interface CanvasPattern {
+    setTransform(matrix: SVGMatrix): void;
+}
+
+declare var CanvasPattern: {
+    prototype: CanvasPattern;
+    new(): CanvasPattern;
+};
+
+interface CanvasRenderingContext2D extends Object, CanvasPathMethods {
+    readonly canvas: HTMLCanvasElement;
+    fillStyle: string | CanvasGradient | CanvasPattern;
+    font: string;
+    globalAlpha: number;
+    globalCompositeOperation: string;
+    imageSmoothingEnabled: boolean;
+    lineCap: string;
+    lineDashOffset: number;
+    lineJoin: string;
+    lineWidth: number;
+    miterLimit: number;
+    msFillRule: CanvasFillRule;
+    shadowBlur: number;
+    shadowColor: string;
+    shadowOffsetX: number;
+    shadowOffsetY: number;
+    strokeStyle: string | CanvasGradient | CanvasPattern;
+    textAlign: string;
+    textBaseline: string;
+    mozImageSmoothingEnabled: boolean;
+    webkitImageSmoothingEnabled: boolean;
+    oImageSmoothingEnabled: boolean;
+    beginPath(): void;
+    clearRect(x: number, y: number, w: number, h: number): void;
+    clip(fillRule?: CanvasFillRule): void;
+    createImageData(imageDataOrSw: number | ImageData, sh?: number): ImageData;
+    createLinearGradient(x0: number, y0: number, x1: number, y1: number): CanvasGradient;
+    createPattern(image: HTMLImageElement | HTMLCanvasElement | HTMLVideoElement, repetition: string): CanvasPattern;
+    createRadialGradient(x0: number, y0: number, r0: number, x1: number, y1: number, r1: number): CanvasGradient;
+    drawFocusIfNeeded(element: Element): void;
+    drawImage(image: HTMLImageElement | HTMLCanvasElement | HTMLVideoElement | ImageBitmap, dstX: number, dstY: number): void;
+    drawImage(image: HTMLImageElement | HTMLCanvasElement | HTMLVideoElement | ImageBitmap, dstX: number, dstY: number, dstW: number, dstH: number): void;
+    drawImage(image: HTMLImageElement | HTMLCanvasElement | HTMLVideoElement | ImageBitmap, srcX: number, srcY: number, srcW: number, srcH: number, dstX: number, dstY: number, dstW: number, dstH: number): void;
+    fill(fillRule?: CanvasFillRule): void;
+    fillRect(x: number, y: number, w: number, h: number): void;
+    fillText(text: string, x: number, y: number, maxWidth?: number): void;
+    getImageData(sx: number, sy: number, sw: number, sh: number): ImageData;
+    getLineDash(): number[];
+    isPointInPath(x: number, y: number, fillRule?: CanvasFillRule): boolean;
+    measureText(text: string): TextMetrics;
+    putImageData(imagedata: ImageData, dx: number, dy: number, dirtyX?: number, dirtyY?: number, dirtyWidth?: number, dirtyHeight?: number): void;
+    restore(): void;
+    rotate(angle: number): void;
+    save(): void;
+    scale(x: number, y: number): void;
+    setLineDash(segments: number[]): void;
+    setTransform(m11: number, m12: number, m21: number, m22: number, dx: number, dy: number): void;
+    stroke(path?: Path2D): void;
+    strokeRect(x: number, y: number, w: number, h: number): void;
+    strokeText(text: string, x: number, y: number, maxWidth?: number): void;
+    transform(m11: number, m12: number, m21: number, m22: number, dx: number, dy: number): void;
+    translate(x: number, y: number): void;
+}
+
+declare var CanvasRenderingContext2D: {
+    prototype: CanvasRenderingContext2D;
+    new(): CanvasRenderingContext2D;
+};
+
+interface CDATASection extends Text {
+}
+
+declare var CDATASection: {
+    prototype: CDATASection;
+    new(): CDATASection;
+};
+
+interface ChannelMergerNode extends AudioNode {
+}
+
+declare var ChannelMergerNode: {
+    prototype: ChannelMergerNode;
+    new(): ChannelMergerNode;
+};
+
+interface ChannelSplitterNode extends AudioNode {
+}
+
+declare var ChannelSplitterNode: {
+    prototype: ChannelSplitterNode;
+    new(): ChannelSplitterNode;
+};
+
+interface CharacterData extends Node, ChildNode {
+    data: string;
+    readonly length: number;
+    appendData(arg: string): void;
+    deleteData(offset: number, count: number): void;
+    insertData(offset: number, arg: string): void;
+    replaceData(offset: number, count: number, arg: string): void;
+    substringData(offset: number, count: number): string;
+}
+
+declare var CharacterData: {
+    prototype: CharacterData;
+    new(): CharacterData;
+};
+
+interface ClientRect {
+    bottom: number;
+    readonly height: number;
+    left: number;
+    right: number;
+    top: number;
+    readonly width: number;
+}
+
+declare var ClientRect: {
+    prototype: ClientRect;
+    new(): ClientRect;
+};
+
+interface ClientRectList {
+    readonly length: number;
+    item(index: number): ClientRect;
+    [index: number]: ClientRect;
+}
+
+declare var ClientRectList: {
+    prototype: ClientRectList;
+    new(): ClientRectList;
+};
+
+interface ClipboardEvent extends Event {
+    readonly clipboardData: DataTransfer;
+}
+
+declare var ClipboardEvent: {
+    prototype: ClipboardEvent;
+    new(type: string, eventInitDict?: ClipboardEventInit): ClipboardEvent;
+};
+
+interface CloseEvent extends Event {
+    readonly code: number;
+    readonly reason: string;
+    readonly wasClean: boolean;
+    initCloseEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, wasCleanArg: boolean, codeArg: number, reasonArg: string): void;
+}
+
+declare var CloseEvent: {
+    prototype: CloseEvent;
+    new(typeArg: string, eventInitDict?: CloseEventInit): CloseEvent;
+};
+
+interface Comment extends CharacterData {
+    text: string;
+}
+
+declare var Comment: {
+    prototype: Comment;
+    new(): Comment;
+};
+
+interface CompositionEvent extends UIEvent {
+    readonly data: string;
+    readonly locale: string;
+    initCompositionEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, dataArg: string, locale: string): void;
+}
+
+declare var CompositionEvent: {
+    prototype: CompositionEvent;
+    new(typeArg: string, eventInitDict?: CompositionEventInit): CompositionEvent;
+};
+
+interface Console {
+    assert(test?: boolean, message?: string, ...optionalParams: any[]): void;
+    clear(): void;
+    count(countTitle?: string): void;
+    debug(message?: any, ...optionalParams: any[]): void;
+    dir(value?: any, ...optionalParams: any[]): void;
+    dirxml(value: any): void;
+    error(message?: any, ...optionalParams: any[]): void;
+    exception(message?: string, ...optionalParams: any[]): void;
+    group(groupTitle?: string, ...optionalParams: any[]): void;
+    groupCollapsed(groupTitle?: string, ...optionalParams: any[]): void;
+    groupEnd(): void;
+    info(message?: any, ...optionalParams: any[]): void;
+    log(message?: any, ...optionalParams: any[]): void;
+    msIsIndependentlyComposed(element: Element): boolean;
+    profile(reportName?: string): void;
+    profileEnd(): void;
+    select(element: Element): void;
+    table(...data: any[]): void;
+    time(timerName?: string): void;
+    timeEnd(timerName?: string): void;
+    trace(message?: any, ...optionalParams: any[]): void;
+    warn(message?: any, ...optionalParams: any[]): void;
+}
+
+declare var Console: {
+    prototype: Console;
+    new(): Console;
+};
+
+interface ConvolverNode extends AudioNode {
+    buffer: AudioBuffer | null;
+    normalize: boolean;
+}
+
+declare var ConvolverNode: {
+    prototype: ConvolverNode;
+    new(): ConvolverNode;
+};
+
+interface Coordinates {
+    readonly accuracy: number;
+    readonly altitude: number | null;
+    readonly altitudeAccuracy: number | null;
+    readonly heading: number | null;
+    readonly latitude: number;
+    readonly longitude: number;
+    readonly speed: number | null;
+}
+
+declare var Coordinates: {
+    prototype: Coordinates;
+    new(): Coordinates;
+};
+
+interface Crypto extends Object, RandomSource {
+    readonly subtle: SubtleCrypto;
+}
+
+declare var Crypto: {
+    prototype: Crypto;
+    new(): Crypto;
+};
+
+interface CryptoKey {
+    readonly algorithm: KeyAlgorithm;
+    readonly extractable: boolean;
+    readonly type: string;
+    readonly usages: string[];
+}
+
+declare var CryptoKey: {
+    prototype: CryptoKey;
+    new(): CryptoKey;
+};
+
+interface CryptoKeyPair {
+    privateKey: CryptoKey;
+    publicKey: CryptoKey;
+}
+
+declare var CryptoKeyPair: {
+    prototype: CryptoKeyPair;
+    new(): CryptoKeyPair;
+};
+
+interface CSS {
+    supports(property: string, value?: string): boolean;
+}
+declare var CSS: CSS;
+
+interface CSSConditionRule extends CSSGroupingRule {
+    conditionText: string;
+}
+
+declare var CSSConditionRule: {
+    prototype: CSSConditionRule;
+    new(): CSSConditionRule;
+};
+
+interface CSSFontFaceRule extends CSSRule {
+    readonly style: CSSStyleDeclaration;
+}
+
+declare var CSSFontFaceRule: {
+    prototype: CSSFontFaceRule;
+    new(): CSSFontFaceRule;
+};
+
+interface CSSGroupingRule extends CSSRule {
+    readonly cssRules: CSSRuleList;
+    deleteRule(index: number): void;
+    insertRule(rule: string, index: number): number;
+}
+
+declare var CSSGroupingRule: {
+    prototype: CSSGroupingRule;
+    new(): CSSGroupingRule;
+};
+
+interface CSSImportRule extends CSSRule {
+    readonly href: string;
+    readonly media: MediaList;
+    readonly styleSheet: CSSStyleSheet;
+}
+
+declare var CSSImportRule: {
+    prototype: CSSImportRule;
+    new(): CSSImportRule;
+};
+
+interface CSSKeyframeRule extends CSSRule {
+    keyText: string;
+    readonly style: CSSStyleDeclaration;
+}
+
+declare var CSSKeyframeRule: {
+    prototype: CSSKeyframeRule;
+    new(): CSSKeyframeRule;
+};
+
+interface CSSKeyframesRule extends CSSRule {
+    readonly cssRules: CSSRuleList;
+    name: string;
+    appendRule(rule: string): void;
+    deleteRule(rule: string): void;
+    findRule(rule: string): CSSKeyframeRule;
+}
+
+declare var CSSKeyframesRule: {
+    prototype: CSSKeyframesRule;
+    new(): CSSKeyframesRule;
+};
+
+interface CSSMediaRule extends CSSConditionRule {
+    readonly media: MediaList;
+}
+
+declare var CSSMediaRule: {
+    prototype: CSSMediaRule;
+    new(): CSSMediaRule;
+};
+
+interface CSSNamespaceRule extends CSSRule {
+    readonly namespaceURI: string;
+    readonly prefix: string;
+}
+
+declare var CSSNamespaceRule: {
+    prototype: CSSNamespaceRule;
+    new(): CSSNamespaceRule;
+};
+
+interface CSSPageRule extends CSSRule {
+    readonly pseudoClass: string;
+    readonly selector: string;
+    selectorText: string;
+    readonly style: CSSStyleDeclaration;
+}
+
+declare var CSSPageRule: {
+    prototype: CSSPageRule;
+    new(): CSSPageRule;
+};
+
+interface CSSRule {
+    cssText: string;
+    readonly parentRule: CSSRule;
+    readonly parentStyleSheet: CSSStyleSheet;
+    readonly type: number;
+    readonly CHARSET_RULE: number;
+    readonly FONT_FACE_RULE: number;
+    readonly IMPORT_RULE: number;
+    readonly KEYFRAME_RULE: number;
+    readonly KEYFRAMES_RULE: number;
+    readonly MEDIA_RULE: number;
+    readonly NAMESPACE_RULE: number;
+    readonly PAGE_RULE: number;
+    readonly STYLE_RULE: number;
+    readonly SUPPORTS_RULE: number;
+    readonly UNKNOWN_RULE: number;
+    readonly VIEWPORT_RULE: number;
+}
+
+declare var CSSRule: {
+    prototype: CSSRule;
+    new(): CSSRule;
+    readonly CHARSET_RULE: number;
+    readonly FONT_FACE_RULE: number;
+    readonly IMPORT_RULE: number;
+    readonly KEYFRAME_RULE: number;
+    readonly KEYFRAMES_RULE: number;
+    readonly MEDIA_RULE: number;
+    readonly NAMESPACE_RULE: number;
+    readonly PAGE_RULE: number;
+    readonly STYLE_RULE: number;
+    readonly SUPPORTS_RULE: number;
+    readonly UNKNOWN_RULE: number;
+    readonly VIEWPORT_RULE: number;
+};
+
+interface CSSRuleList {
+    readonly length: number;
+    item(index: number): CSSRule;
+    [index: number]: CSSRule;
+}
+
+declare var CSSRuleList: {
+    prototype: CSSRuleList;
+    new(): CSSRuleList;
+};
+
+interface CSSStyleDeclaration {
+    alignContent: string | null;
+    alignItems: string | null;
+    alignmentBaseline: string | null;
+    alignSelf: string | null;
+    animation: string | null;
+    animationDelay: string | null;
+    animationDirection: string | null;
+    animationDuration: string | null;
+    animationFillMode: string | null;
+    animationIterationCount: string | null;
+    animationName: string | null;
+    animationPlayState: string | null;
+    animationTimingFunction: string | null;
+    backfaceVisibility: string | null;
+    background: string | null;
+    backgroundAttachment: string | null;
+    backgroundClip: string | null;
+    backgroundColor: string | null;
+    backgroundImage: string | null;
+    backgroundOrigin: string | null;
+    backgroundPosition: string | null;
+    backgroundPositionX: string | null;
+    backgroundPositionY: string | null;
+    backgroundRepeat: string | null;
+    backgroundSize: string | null;
+    baselineShift: string | null;
+    border: string | null;
+    borderBottom: string | null;
+    borderBottomColor: string | null;
+    borderBottomLeftRadius: string | null;
+    borderBottomRightRadius: string | null;
+    borderBottomStyle: string | null;
+    borderBottomWidth: string | null;
+    borderCollapse: string | null;
+    borderColor: string | null;
+    borderImage: string | null;
+    borderImageOutset: string | null;
+    borderImageRepeat: string | null;
+    borderImageSlice: string | null;
+    borderImageSource: string | null;
+    borderImageWidth: string | null;
+    borderLeft: string | null;
+    borderLeftColor: string | null;
+    borderLeftStyle: string | null;
+    borderLeftWidth: string | null;
+    borderRadius: string | null;
+    borderRight: string | null;
+    borderRightColor: string | null;
+    borderRightStyle: string | null;
+    borderRightWidth: string | null;
+    borderSpacing: string | null;
+    borderStyle: string | null;
+    borderTop: string | null;
+    borderTopColor: string | null;
+    borderTopLeftRadius: string | null;
+    borderTopRightRadius: string | null;
+    borderTopStyle: string | null;
+    borderTopWidth: string | null;
+    borderWidth: string | null;
+    bottom: string | null;
+    boxShadow: string | null;
+    boxSizing: string | null;
+    breakAfter: string | null;
+    breakBefore: string | null;
+    breakInside: string | null;
+    captionSide: string | null;
+    clear: string | null;
+    clip: string | null;
+    clipPath: string | null;
+    clipRule: string | null;
+    color: string | null;
+    colorInterpolationFilters: string | null;
+    columnCount: any;
+    columnFill: string | null;
+    columnGap: any;
+    columnRule: string | null;
+    columnRuleColor: any;
+    columnRuleStyle: string | null;
+    columnRuleWidth: any;
+    columns: string | null;
+    columnSpan: string | null;
+    columnWidth: any;
+    content: string | null;
+    counterIncrement: string | null;
+    counterReset: string | null;
+    cssFloat: string | null;
+    cssText: string;
+    cursor: string | null;
+    direction: string | null;
+    display: string | null;
+    dominantBaseline: string | null;
+    emptyCells: string | null;
+    enableBackground: string | null;
+    fill: string | null;
+    fillOpacity: string | null;
+    fillRule: string | null;
+    filter: string | null;
+    flex: string | null;
+    flexBasis: string | null;
+    flexDirection: string | null;
+    flexFlow: string | null;
+    flexGrow: string | null;
+    flexShrink: string | null;
+    flexWrap: string | null;
+    floodColor: string | null;
+    floodOpacity: string | null;
+    font: string | null;
+    fontFamily: string | null;
+    fontFeatureSettings: string | null;
+    fontSize: string | null;
+    fontSizeAdjust: string | null;
+    fontStretch: string | null;
+    fontStyle: string | null;
+    fontVariant: string | null;
+    fontWeight: string | null;
+    glyphOrientationHorizontal: string | null;
+    glyphOrientationVertical: string | null;
+    height: string | null;
+    imeMode: string | null;
+    justifyContent: string | null;
+    kerning: string | null;
+    layoutGrid: string | null;
+    layoutGridChar: string | null;
+    layoutGridLine: string | null;
+    layoutGridMode: string | null;
+    layoutGridType: string | null;
+    left: string | null;
+    readonly length: number;
+    letterSpacing: string | null;
+    lightingColor: string | null;
+    lineBreak: string | null;
+    lineHeight: string | null;
+    listStyle: string | null;
+    listStyleImage: string | null;
+    listStylePosition: string | null;
+    listStyleType: string | null;
+    margin: string | null;
+    marginBottom: string | null;
+    marginLeft: string | null;
+    marginRight: string | null;
+    marginTop: string | null;
+    marker: string | null;
+    markerEnd: string | null;
+    markerMid: string | null;
+    markerStart: string | null;
+    mask: string | null;
+    maxHeight: string | null;
+    maxWidth: string | null;
+    minHeight: string | null;
+    minWidth: string | null;
+    msContentZoomChaining: string | null;
+    msContentZooming: string | null;
+    msContentZoomLimit: string | null;
+    msContentZoomLimitMax: any;
+    msContentZoomLimitMin: any;
+    msContentZoomSnap: string | null;
+    msContentZoomSnapPoints: string | null;
+    msContentZoomSnapType: string | null;
+    msFlowFrom: string | null;
+    msFlowInto: string | null;
+    msFontFeatureSettings: string | null;
+    msGridColumn: any;
+    msGridColumnAlign: string | null;
+    msGridColumns: string | null;
+    msGridColumnSpan: any;
+    msGridRow: any;
+    msGridRowAlign: string | null;
+    msGridRows: string | null;
+    msGridRowSpan: any;
+    msHighContrastAdjust: string | null;
+    msHyphenateLimitChars: string | null;
+    msHyphenateLimitLines: any;
+    msHyphenateLimitZone: any;
+    msHyphens: string | null;
+    msImeAlign: string | null;
+    msOverflowStyle: string | null;
+    msScrollChaining: string | null;
+    msScrollLimit: string | null;
+    msScrollLimitXMax: any;
+    msScrollLimitXMin: any;
+    msScrollLimitYMax: any;
+    msScrollLimitYMin: any;
+    msScrollRails: string | null;
+    msScrollSnapPointsX: string | null;
+    msScrollSnapPointsY: string | null;
+    msScrollSnapType: string | null;
+    msScrollSnapX: string | null;
+    msScrollSnapY: string | null;
+    msScrollTranslation: string | null;
+    msTextCombineHorizontal: string | null;
+    msTextSizeAdjust: any;
+    msTouchAction: string | null;
+    msTouchSelect: string | null;
+    msUserSelect: string | null;
+    msWrapFlow: string;
+    msWrapMargin: any;
+    msWrapThrough: string;
+    opacity: string | null;
+    order: string | null;
+    orphans: string | null;
+    outline: string | null;
+    outlineColor: string | null;
+    outlineOffset: string | null;
+    outlineStyle: string | null;
+    outlineWidth: string | null;
+    overflow: string | null;
+    overflowX: string | null;
+    overflowY: string | null;
+    padding: string | null;
+    paddingBottom: string | null;
+    paddingLeft: string | null;
+    paddingRight: string | null;
+    paddingTop: string | null;
+    pageBreakAfter: string | null;
+    pageBreakBefore: string | null;
+    pageBreakInside: string | null;
+    readonly parentRule: CSSRule;
+    perspective: string | null;
+    perspectiveOrigin: string | null;
+    pointerEvents: string | null;
+    position: string | null;
+    quotes: string | null;
+    right: string | null;
+    rotate: string | null;
+    rubyAlign: string | null;
+    rubyOverhang: string | null;
+    rubyPosition: string | null;
+    scale: string | null;
+    stopColor: string | null;
+    stopOpacity: string | null;
+    stroke: string | null;
+    strokeDasharray: string | null;
+    strokeDashoffset: string | null;
+    strokeLinecap: string | null;
+    strokeLinejoin: string | null;
+    strokeMiterlimit: string | null;
+    strokeOpacity: string | null;
+    strokeWidth: string | null;
+    tableLayout: string | null;
+    textAlign: string | null;
+    textAlignLast: string | null;
+    textAnchor: string | null;
+    textDecoration: string | null;
+    textIndent: string | null;
+    textJustify: string | null;
+    textKashida: string | null;
+    textKashidaSpace: string | null;
+    textOverflow: string | null;
+    textShadow: string | null;
+    textTransform: string | null;
+    textUnderlinePosition: string | null;
+    top: string | null;
+    touchAction: string | null;
+    transform: string | null;
+    transformOrigin: string | null;
+    transformStyle: string | null;
+    transition: string | null;
+    transitionDelay: string | null;
+    transitionDuration: string | null;
+    transitionProperty: string | null;
+    transitionTimingFunction: string | null;
+    translate: string | null;
+    unicodeBidi: string | null;
+    verticalAlign: string | null;
+    visibility: string | null;
+    webkitAlignContent: string | null;
+    webkitAlignItems: string | null;
+    webkitAlignSelf: string | null;
+    webkitAnimation: string | null;
+    webkitAnimationDelay: string | null;
+    webkitAnimationDirection: string | null;
+    webkitAnimationDuration: string | null;
+    webkitAnimationFillMode: string | null;
+    webkitAnimationIterationCount: string | null;
+    webkitAnimationName: string | null;
+    webkitAnimationPlayState: string | null;
+    webkitAnimationTimingFunction: string | null;
+    webkitAppearance: string | null;
+    webkitBackfaceVisibility: string | null;
+    webkitBackgroundClip: string | null;
+    webkitBackgroundOrigin: string | null;
+    webkitBackgroundSize: string | null;
+    webkitBorderBottomLeftRadius: string | null;
+    webkitBorderBottomRightRadius: string | null;
+    webkitBorderImage: string | null;
+    webkitBorderRadius: string | null;
+    webkitBorderTopLeftRadius: string | null;
+    webkitBorderTopRightRadius: string | null;
+    webkitBoxAlign: string | null;
+    webkitBoxDirection: string | null;
+    webkitBoxFlex: string | null;
+    webkitBoxOrdinalGroup: string | null;
+    webkitBoxOrient: string | null;
+    webkitBoxPack: string | null;
+    webkitBoxSizing: string | null;
+    webkitColumnBreakAfter: string | null;
+    webkitColumnBreakBefore: string | null;
+    webkitColumnBreakInside: string | null;
+    webkitColumnCount: any;
+    webkitColumnGap: any;
+    webkitColumnRule: string | null;
+    webkitColumnRuleColor: any;
+    webkitColumnRuleStyle: string | null;
+    webkitColumnRuleWidth: any;
+    webkitColumns: string | null;
+    webkitColumnSpan: string | null;
+    webkitColumnWidth: any;
+    webkitFilter: string | null;
+    webkitFlex: string | null;
+    webkitFlexBasis: string | null;
+    webkitFlexDirection: string | null;
+    webkitFlexFlow: string | null;
+    webkitFlexGrow: string | null;
+    webkitFlexShrink: string | null;
+    webkitFlexWrap: string | null;
+    webkitJustifyContent: string | null;
+    webkitOrder: string | null;
+    webkitPerspective: string | null;
+    webkitPerspectiveOrigin: string | null;
+    webkitTapHighlightColor: string | null;
+    webkitTextFillColor: string | null;
+    webkitTextSizeAdjust: any;
+    webkitTextStroke: string | null;
+    webkitTextStrokeColor: string | null;
+    webkitTextStrokeWidth: string | null;
+    webkitTransform: string | null;
+    webkitTransformOrigin: string | null;
+    webkitTransformStyle: string | null;
+    webkitTransition: string | null;
+    webkitTransitionDelay: string | null;
+    webkitTransitionDuration: string | null;
+    webkitTransitionProperty: string | null;
+    webkitTransitionTimingFunction: string | null;
+    webkitUserModify: string | null;
+    webkitUserSelect: string | null;
+    webkitWritingMode: string | null;
+    whiteSpace: string | null;
+    widows: string | null;
+    width: string | null;
+    wordBreak: string | null;
+    wordSpacing: string | null;
+    wordWrap: string | null;
+    writingMode: string | null;
+    zIndex: string | null;
+    zoom: string | null;
+    resize: string | null;
+    userSelect: string | null;
+    getPropertyPriority(propertyName: string): string;
+    getPropertyValue(propertyName: string): string;
+    item(index: number): string;
+    removeProperty(propertyName: string): string;
+    setProperty(propertyName: string, value: string | null, priority?: string): void;
+    [index: number]: string;
+}
+
+declare var CSSStyleDeclaration: {
+    prototype: CSSStyleDeclaration;
+    new(): CSSStyleDeclaration;
+};
+
+interface CSSStyleRule extends CSSRule {
+    readonly readOnly: boolean;
+    selectorText: string;
+    readonly style: CSSStyleDeclaration;
+}
+
+declare var CSSStyleRule: {
+    prototype: CSSStyleRule;
+    new(): CSSStyleRule;
+};
+
+interface CSSStyleSheet extends StyleSheet {
+    readonly cssRules: CSSRuleList;
+    cssText: string;
+    readonly id: string;
+    readonly imports: StyleSheetList;
+    readonly isAlternate: boolean;
+    readonly isPrefAlternate: boolean;
+    readonly ownerRule: CSSRule;
+    readonly owningElement: Element;
+    readonly pages: StyleSheetPageList;
+    readonly readOnly: boolean;
+    readonly rules: CSSRuleList;
+    addImport(bstrURL: string, lIndex?: number): number;
+    addPageRule(bstrSelector: string, bstrStyle: string, lIndex?: number): number;
+    addRule(bstrSelector: string, bstrStyle?: string, lIndex?: number): number;
+    deleteRule(index?: number): void;
+    insertRule(rule: string, index?: number): number;
+    removeImport(lIndex: number): void;
+    removeRule(lIndex: number): void;
+}
+
+declare var CSSStyleSheet: {
+    prototype: CSSStyleSheet;
+    new(): CSSStyleSheet;
+};
+
+interface CSSSupportsRule extends CSSConditionRule {
+}
+
+declare var CSSSupportsRule: {
+    prototype: CSSSupportsRule;
+    new(): CSSSupportsRule;
+};
+
+interface CustomEvent extends Event {
+    readonly detail: any;
+    initCustomEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, detailArg: any): void;
+}
+
+declare var CustomEvent: {
+    prototype: CustomEvent;
+    new(typeArg: string, eventInitDict?: CustomEventInit): CustomEvent;
+};
+
+interface DataCue extends TextTrackCue {
+    data: ArrayBuffer;
+    addEventListener<K extends keyof TextTrackCueEventMap>(type: K, listener: (this: DataCue, ev: TextTrackCueEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var DataCue: {
+    prototype: DataCue;
+    new(): DataCue;
+};
+
+interface DataTransfer {
+    dropEffect: string;
+    effectAllowed: string;
+    readonly files: FileList;
+    readonly items: DataTransferItemList;
+    readonly types: string[];
+    clearData(format?: string): boolean;
+    getData(format: string): string;
+    setData(format: string, data: string): boolean;
+    setDragImage(image: Element, x: number, y: number): void;
+}
+
+declare var DataTransfer: {
+    prototype: DataTransfer;
+    new(): DataTransfer;
+};
+
+interface DataTransferItem {
+    readonly kind: string;
+    readonly type: string;
+    getAsFile(): File | null;
+    getAsString(_callback: FunctionStringCallback | null): void;
+    webkitGetAsEntry(): any;
+}
+
+declare var DataTransferItem: {
+    prototype: DataTransferItem;
+    new(): DataTransferItem;
+};
+
+interface DataTransferItemList {
+    readonly length: number;
+    add(data: File): DataTransferItem | null;
+    clear(): void;
+    item(index: number): DataTransferItem;
+    remove(index: number): void;
+    [index: number]: DataTransferItem;
+}
+
+declare var DataTransferItemList: {
+    prototype: DataTransferItemList;
+    new(): DataTransferItemList;
+};
+
+interface DeferredPermissionRequest {
+    readonly id: number;
+    readonly type: MSWebViewPermissionType;
+    readonly uri: string;
+    allow(): void;
+    deny(): void;
+}
+
+declare var DeferredPermissionRequest: {
+    prototype: DeferredPermissionRequest;
+    new(): DeferredPermissionRequest;
+};
+
+interface DelayNode extends AudioNode {
+    readonly delayTime: AudioParam;
+}
+
+declare var DelayNode: {
+    prototype: DelayNode;
+    new(): DelayNode;
+};
+
+interface DeviceAcceleration {
+    readonly x: number | null;
+    readonly y: number | null;
+    readonly z: number | null;
+}
+
+declare var DeviceAcceleration: {
+    prototype: DeviceAcceleration;
+    new(): DeviceAcceleration;
+};
+
+interface DeviceLightEvent extends Event {
+    readonly value: number;
+}
+
+declare var DeviceLightEvent: {
+    prototype: DeviceLightEvent;
+    new(typeArg: string, eventInitDict?: DeviceLightEventInit): DeviceLightEvent;
+};
+
+interface DeviceMotionEvent extends Event {
+    readonly acceleration: DeviceAcceleration | null;
+    readonly accelerationIncludingGravity: DeviceAcceleration | null;
+    readonly interval: number | null;
+    readonly rotationRate: DeviceRotationRate | null;
+    initDeviceMotionEvent(type: string, bubbles: boolean, cancelable: boolean, acceleration: DeviceAccelerationDict | null, accelerationIncludingGravity: DeviceAccelerationDict | null, rotationRate: DeviceRotationRateDict | null, interval: number | null): void;
+}
+
+declare var DeviceMotionEvent: {
+    prototype: DeviceMotionEvent;
+    new(typeArg: string, eventInitDict?: DeviceMotionEventInit): DeviceMotionEvent;
+};
+
+interface DeviceOrientationEvent extends Event {
+    readonly absolute: boolean;
+    readonly alpha: number | null;
+    readonly beta: number | null;
+    readonly gamma: number | null;
+    initDeviceOrientationEvent(type: string, bubbles: boolean, cancelable: boolean, alpha: number | null, beta: number | null, gamma: number | null, absolute: boolean): void;
+}
+
+declare var DeviceOrientationEvent: {
+    prototype: DeviceOrientationEvent;
+    new(typeArg: string, eventInitDict?: DeviceOrientationEventInit): DeviceOrientationEvent;
+};
+
+interface DeviceRotationRate {
+    readonly alpha: number | null;
+    readonly beta: number | null;
+    readonly gamma: number | null;
+}
+
+declare var DeviceRotationRate: {
+    prototype: DeviceRotationRate;
+    new(): DeviceRotationRate;
+};
+
+interface DocumentEventMap extends GlobalEventHandlersEventMap {
+    "abort": UIEvent;
+    "activate": UIEvent;
+    "beforeactivate": UIEvent;
+    "beforedeactivate": UIEvent;
+    "blur": FocusEvent;
+    "canplay": Event;
+    "canplaythrough": Event;
+    "change": Event;
+    "click": MouseEvent;
+    "contextmenu": PointerEvent;
+    "dblclick": MouseEvent;
+    "deactivate": UIEvent;
+    "drag": DragEvent;
+    "dragend": DragEvent;
+    "dragenter": DragEvent;
+    "dragleave": DragEvent;
+    "dragover": DragEvent;
+    "dragstart": DragEvent;
+    "drop": DragEvent;
+    "durationchange": Event;
+    "emptied": Event;
+    "ended": MediaStreamErrorEvent;
+    "error": ErrorEvent;
+    "focus": FocusEvent;
+    "fullscreenchange": Event;
+    "fullscreenerror": Event;
+    "input": Event;
+    "invalid": Event;
+    "keydown": KeyboardEvent;
+    "keypress": KeyboardEvent;
+    "keyup": KeyboardEvent;
+    "load": Event;
+    "loadeddata": Event;
+    "loadedmetadata": Event;
+    "loadstart": Event;
+    "mousedown": MouseEvent;
+    "mousemove": MouseEvent;
+    "mouseout": MouseEvent;
+    "mouseover": MouseEvent;
+    "mouseup": MouseEvent;
+    "mousewheel": WheelEvent;
+    "MSContentZoom": UIEvent;
+    "MSGestureChange": MSGestureEvent;
+    "MSGestureDoubleTap": MSGestureEvent;
+    "MSGestureEnd": MSGestureEvent;
+    "MSGestureHold": MSGestureEvent;
+    "MSGestureStart": MSGestureEvent;
+    "MSGestureTap": MSGestureEvent;
+    "MSInertiaStart": MSGestureEvent;
+    "MSManipulationStateChanged": MSManipulationEvent;
+    "MSPointerCancel": MSPointerEvent;
+    "MSPointerDown": MSPointerEvent;
+    "MSPointerEnter": MSPointerEvent;
+    "MSPointerLeave": MSPointerEvent;
+    "MSPointerMove": MSPointerEvent;
+    "MSPointerOut": MSPointerEvent;
+    "MSPointerOver": MSPointerEvent;
+    "MSPointerUp": MSPointerEvent;
+    "mssitemodejumplistitemremoved": MSSiteModeEvent;
+    "msthumbnailclick": MSSiteModeEvent;
+    "pause": Event;
+    "play": Event;
+    "playing": Event;
+    "pointerlockchange": Event;
+    "pointerlockerror": Event;
+    "progress": ProgressEvent;
+    "ratechange": Event;
+    "readystatechange": Event;
+    "reset": Event;
+    "scroll": UIEvent;
+    "seeked": Event;
+    "seeking": Event;
+    "select": UIEvent;
+    "selectionchange": Event;
+    "selectstart": Event;
+    "stalled": Event;
+    "stop": Event;
+    "submit": Event;
+    "suspend": Event;
+    "timeupdate": Event;
+    "touchcancel": TouchEvent;
+    "touchend": TouchEvent;
+    "touchmove": TouchEvent;
+    "touchstart": TouchEvent;
+    "volumechange": Event;
+    "waiting": Event;
+    "webkitfullscreenchange": Event;
+    "webkitfullscreenerror": Event;
+}
+
+interface Document extends Node, GlobalEventHandlers, NodeSelector, DocumentEvent, ParentNode, DocumentOrShadowRoot {
+    /**
+     * Gets the object that has the focus when the parent document has focus.
+     */
+    readonly activeElement: Element;
+    /**
+     * Sets or gets the color of all active links in the document.
+     */
+    alinkColor: string;
+    /**
+     * Returns a reference to the collection of elements contained by the object.
+     */
+    readonly all: HTMLAllCollection;
+    /**
+     * Retrieves a collection of all a objects that have a name and/or id property. Objects in this collection are in HTML source order.
+     */
+    anchors: HTMLCollectionOf<HTMLAnchorElement>;
+    /**
+     * Retrieves a collection of all applet objects in the document.
+     */
+    applets: HTMLCollectionOf<HTMLAppletElement>;
+    /**
+     * Deprecated. Sets or retrieves a value that indicates the background color behind the object.
+     */
+    bgColor: string;
+    /**
+     * Specifies the beginning and end of the document body.
+     */
+    body: HTMLElement;
+    readonly characterSet: string;
+    /**
+     * Gets or sets the character set used to encode the object.
+     */
+    charset: string;
+    /**
+     * Gets a value that indicates whether standards-compliant mode is switched on for the object.
+     */
+    readonly compatMode: string;
+    cookie: string;
+    readonly currentScript: HTMLScriptElement | SVGScriptElement;
+    readonly defaultView: Window;
+    /**
+     * Sets or gets a value that indicates whether the document can be edited.
+     */
+    designMode: string;
+    /**
+     * Sets or retrieves a value that indicates the reading order of the object.
+     */
+    dir: string;
+    /**
+     * Gets an object representing the document type declaration associated with the current document.
+     */
+    readonly doctype: DocumentType;
+    /**
+     * Gets a reference to the root node of the document.
+     */
+    documentElement: HTMLElement;
+    /**
+     * Sets or gets the security domain of the document.
+     */
+    domain: string;
+    /**
+     * Retrieves a collection of all embed objects in the document.
+     */
+    embeds: HTMLCollectionOf<HTMLEmbedElement>;
+    /**
+     * Sets or gets the foreground (text) color of the document.
+     */
+    fgColor: string;
+    /**
+     * Retrieves a collection, in source order, of all form objects in the document.
+     */
+    forms: HTMLCollectionOf<HTMLFormElement>;
+    readonly fullscreenElement: Element | null;
+    readonly fullscreenEnabled: boolean;
+    readonly head: HTMLHeadElement;
+    readonly hidden: boolean;
+    /**
+     * Retrieves a collection, in source order, of img objects in the document.
+     */
+    images: HTMLCollectionOf<HTMLImageElement>;
+    /**
+     * Gets the implementation object of the current document.
+     */
+    readonly implementation: DOMImplementation;
+    /**
+     * Returns the character encoding used to create the webpage that is loaded into the document object.
+     */
+    readonly inputEncoding: string | null;
+    /**
+     * Gets the date that the page was last modified, if the page supplies one.
+     */
+    readonly lastModified: string;
+    /**
+     * Sets or gets the color of the document links.
+     */
+    linkColor: string;
+    /**
+     * Retrieves a collection of all a objects that specify the href property and all area objects in the document.
+     */
+    links: HTMLCollectionOf<HTMLAnchorElement | HTMLAreaElement>;
+    /**
+     * Contains information about the current URL.
+     */
+    readonly location: Location;
+    msCapsLockWarningOff: boolean;
+    msCSSOMElementFloatMetrics: boolean;
+    /**
+     * Fires when the user aborts the download.
+     * @param ev The event.
+     */
+    onabort: (this: Document, ev: UIEvent) => any;
+    /**
+     * Fires when the object is set as the active element.
+     * @param ev The event.
+     */
+    onactivate: (this: Document, ev: UIEvent) => any;
+    /**
+     * Fires immediately before the object is set as the active element.
+     * @param ev The event.
+     */
+    onbeforeactivate: (this: Document, ev: UIEvent) => any;
+    /**
+     * Fires immediately before the activeElement is changed from the current object to another object in the parent document.
+     * @param ev The event.
+     */
+    onbeforedeactivate: (this: Document, ev: UIEvent) => any;
+    /**
+     * Fires when the object loses the input focus.
+     * @param ev The focus event.
+     */
+    onblur: (this: Document, ev: FocusEvent) => any;
+    /**
+     * Occurs when playback is possible, but would require further buffering.
+     * @param ev The event.
+     */
+    oncanplay: (this: Document, ev: Event) => any;
+    oncanplaythrough: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the contents of the object or selection have changed.
+     * @param ev The event.
+     */
+    onchange: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the user clicks the left mouse button on the object
+     * @param ev The mouse event.
+     */
+    onclick: (this: Document, ev: MouseEvent) => any;
+    /**
+     * Fires when the user clicks the right mouse button in the client area, opening the context menu.
+     * @param ev The mouse event.
+     */
+    oncontextmenu: (this: Document, ev: PointerEvent) => any;
+    /**
+     * Fires when the user double-clicks the object.
+     * @param ev The mouse event.
+     */
+    ondblclick: (this: Document, ev: MouseEvent) => any;
+    /**
+     * Fires when the activeElement is changed from the current object to another object in the parent document.
+     * @param ev The UI Event
+     */
+    ondeactivate: (this: Document, ev: UIEvent) => any;
+    /**
+     * Fires on the source object continuously during a drag operation.
+     * @param ev The event.
+     */
+    ondrag: (this: Document, ev: DragEvent) => any;
+    /**
+     * Fires on the source object when the user releases the mouse at the close of a drag operation.
+     * @param ev The event.
+     */
+    ondragend: (this: Document, ev: DragEvent) => any;
+    /**
+     * Fires on the target element when the user drags the object to a valid drop target.
+     * @param ev The drag event.
+     */
+    ondragenter: (this: Document, ev: DragEvent) => any;
+    /**
+     * Fires on the target object when the user moves the mouse out of a valid drop target during a drag operation.
+     * @param ev The drag event.
+     */
+    ondragleave: (this: Document, ev: DragEvent) => any;
+    /**
+     * Fires on the target element continuously while the user drags the object over a valid drop target.
+     * @param ev The event.
+     */
+    ondragover: (this: Document, ev: DragEvent) => any;
+    /**
+     * Fires on the source object when the user starts to drag a text selection or selected object.
+     * @param ev The event.
+     */
+    ondragstart: (this: Document, ev: DragEvent) => any;
+    ondrop: (this: Document, ev: DragEvent) => any;
+    /**
+     * Occurs when the duration attribute is updated.
+     * @param ev The event.
+     */
+    ondurationchange: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when the media element is reset to its initial state.
+     * @param ev The event.
+     */
+    onemptied: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when the end of playback is reached.
+     * @param ev The event
+     */
+    onended: (this: Document, ev: MediaStreamErrorEvent) => any;
+    /**
+     * Fires when an error occurs during object loading.
+     * @param ev The event.
+     */
+    onerror: (this: Document, ev: ErrorEvent) => any;
+    /**
+     * Fires when the object receives focus.
+     * @param ev The event.
+     */
+    onfocus: (this: Document, ev: FocusEvent) => any;
+    onfullscreenchange: (this: Document, ev: Event) => any;
+    onfullscreenerror: (this: Document, ev: Event) => any;
+    oninput: (this: Document, ev: Event) => any;
+    oninvalid: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the user presses a key.
+     * @param ev The keyboard event
+     */
+    onkeydown: (this: Document, ev: KeyboardEvent) => any;
+    /**
+     * Fires when the user presses an alphanumeric key.
+     * @param ev The event.
+     */
+    onkeypress: (this: Document, ev: KeyboardEvent) => any;
+    /**
+     * Fires when the user releases a key.
+     * @param ev The keyboard event
+     */
+    onkeyup: (this: Document, ev: KeyboardEvent) => any;
+    /**
+     * Fires immediately after the browser loads the object.
+     * @param ev The event.
+     */
+    onload: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when media data is loaded at the current playback position.
+     * @param ev The event.
+     */
+    onloadeddata: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when the duration and dimensions of the media have been determined.
+     * @param ev The event.
+     */
+    onloadedmetadata: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when Internet Explorer begins looking for media data.
+     * @param ev The event.
+     */
+    onloadstart: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the user clicks the object with either mouse button.
+     * @param ev The mouse event.
+     */
+    onmousedown: (this: Document, ev: MouseEvent) => any;
+    /**
+     * Fires when the user moves the mouse over the object.
+     * @param ev The mouse event.
+     */
+    onmousemove: (this: Document, ev: MouseEvent) => any;
+    /**
+     * Fires when the user moves the mouse pointer outside the boundaries of the object.
+     * @param ev The mouse event.
+     */
+    onmouseout: (this: Document, ev: MouseEvent) => any;
+    /**
+     * Fires when the user moves the mouse pointer into the object.
+     * @param ev The mouse event.
+     */
+    onmouseover: (this: Document, ev: MouseEvent) => any;
+    /**
+     * Fires when the user releases a mouse button while the mouse is over the object.
+     * @param ev The mouse event.
+     */
+    onmouseup: (this: Document, ev: MouseEvent) => any;
+    /**
+     * Fires when the wheel button is rotated.
+     * @param ev The mouse event
+     */
+    onmousewheel: (this: Document, ev: WheelEvent) => any;
+    onmscontentzoom: (this: Document, ev: UIEvent) => any;
+    onmsgesturechange: (this: Document, ev: MSGestureEvent) => any;
+    onmsgesturedoubletap: (this: Document, ev: MSGestureEvent) => any;
+    onmsgestureend: (this: Document, ev: MSGestureEvent) => any;
+    onmsgesturehold: (this: Document, ev: MSGestureEvent) => any;
+    onmsgesturestart: (this: Document, ev: MSGestureEvent) => any;
+    onmsgesturetap: (this: Document, ev: MSGestureEvent) => any;
+    onmsinertiastart: (this: Document, ev: MSGestureEvent) => any;
+    onmsmanipulationstatechanged: (this: Document, ev: MSManipulationEvent) => any;
+    onmspointercancel: (this: Document, ev: MSPointerEvent) => any;
+    onmspointerdown: (this: Document, ev: MSPointerEvent) => any;
+    onmspointerenter: (this: Document, ev: MSPointerEvent) => any;
+    onmspointerleave: (this: Document, ev: MSPointerEvent) => any;
+    onmspointermove: (this: Document, ev: MSPointerEvent) => any;
+    onmspointerout: (this: Document, ev: MSPointerEvent) => any;
+    onmspointerover: (this: Document, ev: MSPointerEvent) => any;
+    onmspointerup: (this: Document, ev: MSPointerEvent) => any;
+    /**
+     * Occurs when an item is removed from a Jump List of a webpage running in Site Mode.
+     * @param ev The event.
+     */
+    onmssitemodejumplistitemremoved: (this: Document, ev: MSSiteModeEvent) => any;
+    /**
+     * Occurs when a user clicks a button in a Thumbnail Toolbar of a webpage running in Site Mode.
+     * @param ev The event.
+     */
+    onmsthumbnailclick: (this: Document, ev: MSSiteModeEvent) => any;
+    /**
+     * Occurs when playback is paused.
+     * @param ev The event.
+     */
+    onpause: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when the play method is requested.
+     * @param ev The event.
+     */
+    onplay: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when the audio or video has started playing.
+     * @param ev The event.
+     */
+    onplaying: (this: Document, ev: Event) => any;
+    onpointerlockchange: (this: Document, ev: Event) => any;
+    onpointerlockerror: (this: Document, ev: Event) => any;
+    /**
+     * Occurs to indicate progress while downloading media data.
+     * @param ev The event.
+     */
+    onprogress: (this: Document, ev: ProgressEvent) => any;
+    /**
+     * Occurs when the playback rate is increased or decreased.
+     * @param ev The event.
+     */
+    onratechange: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the state of the object has changed.
+     * @param ev The event
+     */
+    onreadystatechange: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the user resets a form.
+     * @param ev The event.
+     */
+    onreset: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the user repositions the scroll box in the scroll bar on the object.
+     * @param ev The event.
+     */
+    onscroll: (this: Document, ev: UIEvent) => any;
+    /**
+     * Occurs when the seek operation ends.
+     * @param ev The event.
+     */
+    onseeked: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when the current playback position is moved.
+     * @param ev The event.
+     */
+    onseeking: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the current selection changes.
+     * @param ev The event.
+     */
+    onselect: (this: Document, ev: UIEvent) => any;
+    /**
+     * Fires when the selection state of a document changes.
+     * @param ev The event.
+     */
+    onselectionchange: (this: Document, ev: Event) => any;
+    onselectstart: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when the download has stopped.
+     * @param ev The event.
+     */
+    onstalled: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the user clicks the Stop button or leaves the Web page.
+     * @param ev The event.
+     */
+    onstop: (this: Document, ev: Event) => any;
+    onsubmit: (this: Document, ev: Event) => any;
+    /**
+     * Occurs if the load operation has been intentionally halted.
+     * @param ev The event.
+     */
+    onsuspend: (this: Document, ev: Event) => any;
+    /**
+     * Occurs to indicate the current playback position.
+     * @param ev The event.
+     */
+    ontimeupdate: (this: Document, ev: Event) => any;
+    ontouchcancel: (ev: TouchEvent) => any;
+    ontouchend: (ev: TouchEvent) => any;
+    ontouchmove: (ev: TouchEvent) => any;
+    ontouchstart: (ev: TouchEvent) => any;
+    /**
+     * Occurs when the volume is changed, or playback is muted or unmuted.
+     * @param ev The event.
+     */
+    onvolumechange: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when playback stops because the next frame of a video resource is not available.
+     * @param ev The event.
+     */
+    onwaiting: (this: Document, ev: Event) => any;
+    onwebkitfullscreenchange: (this: Document, ev: Event) => any;
+    onwebkitfullscreenerror: (this: Document, ev: Event) => any;
+    plugins: HTMLCollectionOf<HTMLEmbedElement>;
+    readonly pointerLockElement: Element;
+    /**
+     * Retrieves a value that indicates the current state of the object.
+     */
+    readonly readyState: string;
+    /**
+     * Gets the URL of the location that referred the user to the current page.
+     */
+    readonly referrer: string;
+    /**
+     * Gets the root svg element in the document hierarchy.
+     */
+    readonly rootElement: SVGSVGElement;
+    /**
+     * Retrieves a collection of all script objects in the document.
+     */
+    scripts: HTMLCollectionOf<HTMLScriptElement>;
+    readonly scrollingElement: Element | null;
+    /**
+     * Retrieves a collection of styleSheet objects representing the style sheets that correspond to each instance of a link or style object in the document.
+     */
+    readonly styleSheets: StyleSheetList;
+    /**
+     * Contains the title of the document.
+     */
+    title: string;
+    /**
+     * Sets or gets the URL for the current document.
+     */
+    readonly URL: string;
+    /**
+     * Gets the URL for the document, stripped of any character encoding.
+     */
+    readonly URLUnencoded: string;
+    readonly visibilityState: VisibilityState;
+    /**
+     * Sets or gets the color of the links that the user has visited.
+     */
+    vlinkColor: string;
+    readonly webkitCurrentFullScreenElement: Element | null;
+    readonly webkitFullscreenElement: Element | null;
+    readonly webkitFullscreenEnabled: boolean;
+    readonly webkitIsFullScreen: boolean;
+    readonly xmlEncoding: string | null;
+    xmlStandalone: boolean;
+    /**
+     * Gets or sets the version attribute specified in the declaration of an XML document.
+     */
+    xmlVersion: string | null;
+    adoptNode<T extends Node>(source: T): T;
+    captureEvents(): void;
+    caretRangeFromPoint(x: number, y: number): Range;
+    clear(): void;
+    /**
+     * Closes an output stream and forces the sent data to display.
+     */
+    close(): void;
+    /**
+     * Creates an attribute object with a specified name.
+     * @param name String that sets the attribute object's name.
+     */
+    createAttribute(name: string): Attr;
+    createAttributeNS(namespaceURI: string | null, qualifiedName: string): Attr;
+    createCDATASection(data: string): CDATASection;
+    /**
+     * Creates a comment object with the specified data.
+     * @param data Sets the comment object's data.
+     */
+    createComment(data: string): Comment;
+    /**
+     * Creates a new document.
+     */
+    createDocumentFragment(): DocumentFragment;
+    /**
+     * Creates an instance of the element for the specified tag.
+     * @param tagName The name of an element.
+     */
+    createElement<K extends keyof HTMLElementTagNameMap>(tagName: K): HTMLElementTagNameMap[K];
+    createElement(tagName: string): HTMLElement;
+    createElementNS(namespaceURI: "http://www.w3.org/1999/xhtml", qualifiedName: string): HTMLElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "a"): SVGAElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "circle"): SVGCircleElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "clipPath"): SVGClipPathElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "componentTransferFunction"): SVGComponentTransferFunctionElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "defs"): SVGDefsElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "desc"): SVGDescElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "ellipse"): SVGEllipseElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feBlend"): SVGFEBlendElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feColorMatrix"): SVGFEColorMatrixElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feComponentTransfer"): SVGFEComponentTransferElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feComposite"): SVGFECompositeElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feConvolveMatrix"): SVGFEConvolveMatrixElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feDiffuseLighting"): SVGFEDiffuseLightingElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feDisplacementMap"): SVGFEDisplacementMapElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feDistantLight"): SVGFEDistantLightElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feFlood"): SVGFEFloodElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feFuncA"): SVGFEFuncAElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feFuncB"): SVGFEFuncBElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feFuncG"): SVGFEFuncGElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feFuncR"): SVGFEFuncRElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feGaussianBlur"): SVGFEGaussianBlurElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feImage"): SVGFEImageElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feMerge"): SVGFEMergeElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feMergeNode"): SVGFEMergeNodeElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feMorphology"): SVGFEMorphologyElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feOffset"): SVGFEOffsetElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "fePointLight"): SVGFEPointLightElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feSpecularLighting"): SVGFESpecularLightingElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feSpotLight"): SVGFESpotLightElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feTile"): SVGFETileElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feTurbulence"): SVGFETurbulenceElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "filter"): SVGFilterElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "foreignObject"): SVGForeignObjectElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "g"): SVGGElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "image"): SVGImageElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "gradient"): SVGGradientElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "line"): SVGLineElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "linearGradient"): SVGLinearGradientElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "marker"): SVGMarkerElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "mask"): SVGMaskElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "path"): SVGPathElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "metadata"): SVGMetadataElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "pattern"): SVGPatternElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "polygon"): SVGPolygonElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "polyline"): SVGPolylineElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "radialGradient"): SVGRadialGradientElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "rect"): SVGRectElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "svg"): SVGSVGElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "script"): SVGScriptElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "stop"): SVGStopElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "style"): SVGStyleElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "switch"): SVGSwitchElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "symbol"): SVGSymbolElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "tspan"): SVGTSpanElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "textContent"): SVGTextContentElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "text"): SVGTextElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "textPath"): SVGTextPathElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "textPositioning"): SVGTextPositioningElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "title"): SVGTitleElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "use"): SVGUseElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "view"): SVGViewElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: string): SVGElement;
+    createElementNS(namespaceURI: string | null, qualifiedName: string): Element;
+    createExpression(expression: string, resolver: XPathNSResolver): XPathExpression;
+    /**
+     * Creates a NodeIterator object that you can use to traverse filtered lists of nodes or elements in a document.
+     * @param root The root element or node to start traversing on.
+     * @param whatToShow The type of nodes or elements to appear in the node list
+     * @param filter A custom NodeFilter function to use. For more information, see filter. Use null for no filter.
+     * @param entityReferenceExpansion A flag that specifies whether entity reference nodes are expanded.
+     */
+    createNodeIterator(root: Node, whatToShow?: number, filter?: NodeFilter, entityReferenceExpansion?: boolean): NodeIterator;
+    createNSResolver(nodeResolver: Node): XPathNSResolver;
+    createProcessingInstruction(target: string, data: string): ProcessingInstruction;
+    /**
+     *  Returns an empty range object that has both of its boundary points positioned at the beginning of the document.
+     */
+    createRange(): Range;
+    /**
+     * Creates a text string from the specified value.
+     * @param data String that specifies the nodeValue property of the text node.
+     */
+    createTextNode(data: string): Text;
+    createTouch(view: Window, target: EventTarget, identifier: number, pageX: number, pageY: number, screenX: number, screenY: number): Touch;
+    createTouchList(...touches: Touch[]): TouchList;
+    /**
+     * Creates a TreeWalker object that you can use to traverse filtered lists of nodes or elements in a document.
+     * @param root The root element or node to start traversing on.
+     * @param whatToShow The type of nodes or elements to appear in the node list. For more information, see whatToShow.
+     * @param filter A custom NodeFilter function to use.
+     * @param entityReferenceExpansion A flag that specifies whether entity reference nodes are expanded.
+     */
+    createTreeWalker(root: Node, whatToShow?: number, filter?: NodeFilter, entityReferenceExpansion?: boolean): TreeWalker;
+    /**
+     * Returns the element for the specified x coordinate and the specified y coordinate.
+     * @param x The x-offset
+     * @param y The y-offset
+     */
+    elementFromPoint(x: number, y: number): Element;
+    evaluate(expression: string, contextNode: Node, resolver: XPathNSResolver | null, type: number, result: XPathResult | null): XPathResult;
+    /**
+     * Executes a command on the current document, current selection, or the given range.
+     * @param commandId String that specifies the command to execute. This command can be any of the command identifiers that can be executed in script.
+     * @param showUI Display the user interface, defaults to false.
+     * @param value Value to assign.
+     */
+    execCommand(commandId: string, showUI?: boolean, value?: any): boolean;
+    /**
+     * Displays help information for the given command identifier.
+     * @param commandId Displays help information for the given command identifier.
+     */
+    execCommandShowHelp(commandId: string): boolean;
+    exitFullscreen(): void;
+    exitPointerLock(): void;
+    /**
+     * Causes the element to receive the focus and executes the code specified by the onfocus event.
+     */
+    focus(): void;
+    /**
+     * Returns a reference to the first object with the specified value of the ID or NAME attribute.
+     * @param elementId String that specifies the ID value. Case-insensitive.
+     */
+    getElementById(elementId: string): HTMLElement | null;
+    getElementsByClassName(classNames: string): HTMLCollectionOf<Element>;
+    /**
+     * Gets a collection of objects based on the value of the NAME or ID attribute.
+     * @param elementName Gets a collection of objects based on the value of the NAME or ID attribute.
+     */
+    getElementsByName(elementName: string): NodeListOf<HTMLElement>;
+    /**
+     * Retrieves a collection of objects based on the specified element name.
+     * @param name Specifies the name of an element.
+     */
+    getElementsByTagName<K extends keyof ElementListTagNameMap>(tagname: K): ElementListTagNameMap[K];
+    getElementsByTagName(tagname: string): NodeListOf<Element>;
+    getElementsByTagNameNS(namespaceURI: "http://www.w3.org/1999/xhtml", localName: string): HTMLCollectionOf<HTMLElement>;
+    getElementsByTagNameNS(namespaceURI: "http://www.w3.org/2000/svg", localName: string): HTMLCollectionOf<SVGElement>;
+    getElementsByTagNameNS(namespaceURI: string, localName: string): HTMLCollectionOf<Element>;
+    /**
+     * Returns an object representing the current selection of the document that is loaded into the object displaying a webpage.
+     */
+    getSelection(): Selection;
+    /**
+     * Gets a value indicating whether the object currently has focus.
+     */
+    hasFocus(): boolean;
+    importNode<T extends Node>(importedNode: T, deep: boolean): T;
+    msElementsFromPoint(x: number, y: number): NodeListOf<Element>;
+    msElementsFromRect(left: number, top: number, width: number, height: number): NodeListOf<Element>;
+    /**
+     * Opens a new window and loads a document specified by a given URL. Also, opens a new window that uses the url parameter and the name parameter to collect the output of the write method and the writeln method.
+     * @param url Specifies a MIME type for the document.
+     * @param name Specifies the name of the window. This name is used as the value for the TARGET attribute on a form or an anchor element.
+     * @param features Contains a list of items separated by commas. Each item consists of an option and a value, separated by an equals sign (for example, "fullscreen=yes, toolbar=yes"). The following values are supported.
+     * @param replace Specifies whether the existing entry for the document is replaced in the history list.
+     */
+    open(url?: string, name?: string, features?: string, replace?: boolean): Document;
+    /**
+     * Returns a Boolean value that indicates whether a specified command can be successfully executed using execCommand, given the current state of the document.
+     * @param commandId Specifies a command identifier.
+     */
+    queryCommandEnabled(commandId: string): boolean;
+    /**
+     * Returns a Boolean value that indicates whether the specified command is in the indeterminate state.
+     * @param commandId String that specifies a command identifier.
+     */
+    queryCommandIndeterm(commandId: string): boolean;
+    /**
+     * Returns a Boolean value that indicates the current state of the command.
+     * @param commandId String that specifies a command identifier.
+     */
+    queryCommandState(commandId: string): boolean;
+    /**
+     * Returns a Boolean value that indicates whether the current command is supported on the current range.
+     * @param commandId Specifies a command identifier.
+     */
+    queryCommandSupported(commandId: string): boolean;
+    /**
+     * Retrieves the string associated with a command.
+     * @param commandId String that contains the identifier of a command. This can be any command identifier given in the list of Command Identifiers.
+     */
+    queryCommandText(commandId: string): string;
+    /**
+     * Returns the current value of the document, range, or current selection for the given command.
+     * @param commandId String that specifies a command identifier.
+     */
+    queryCommandValue(commandId: string): string;
+    releaseEvents(): void;
+    /**
+     * Allows updating the print settings for the page.
+     */
+    updateSettings(): void;
+    webkitCancelFullScreen(): void;
+    webkitExitFullscreen(): void;
+    /**
+     * Writes one or more HTML expressions to a document in the specified window.
+     * @param content Specifies the text and HTML tags to write.
+     */
+    write(...content: string[]): void;
+    /**
+     * Writes one or more HTML expressions, followed by a carriage return, to a document in the specified window.
+     * @param content The text and HTML tags to write.
+     */
+    writeln(...content: string[]): void;
+    addEventListener<K extends keyof DocumentEventMap>(type: K, listener: (this: Document, ev: DocumentEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var Document: {
+    prototype: Document;
+    new(): Document;
+};
+
+interface DocumentFragment extends Node, NodeSelector, ParentNode {
+    getElementById(elementId: string): HTMLElement | null;
+}
+
+declare var DocumentFragment: {
+    prototype: DocumentFragment;
+    new(): DocumentFragment;
+};
+
+interface DocumentType extends Node, ChildNode {
+    readonly entities: NamedNodeMap;
+    readonly internalSubset: string | null;
+    readonly name: string;
+    readonly notations: NamedNodeMap;
+    readonly publicId: string;
+    readonly systemId: string;
+}
+
+declare var DocumentType: {
+    prototype: DocumentType;
+    new(): DocumentType;
+};
+
+interface DOMError {
+    readonly name: string;
+    toString(): string;
+}
+
+declare var DOMError: {
+    prototype: DOMError;
+    new(): DOMError;
+};
+
+interface DOMException {
+    readonly code: number;
+    readonly message: string;
+    readonly name: string;
+    toString(): string;
+    readonly ABORT_ERR: number;
+    readonly DATA_CLONE_ERR: number;
+    readonly DOMSTRING_SIZE_ERR: number;
+    readonly HIERARCHY_REQUEST_ERR: number;
+    readonly INDEX_SIZE_ERR: number;
+    readonly INUSE_ATTRIBUTE_ERR: number;
+    readonly INVALID_ACCESS_ERR: number;
+    readonly INVALID_CHARACTER_ERR: number;
+    readonly INVALID_MODIFICATION_ERR: number;
+    readonly INVALID_NODE_TYPE_ERR: number;
+    readonly INVALID_STATE_ERR: number;
+    readonly NAMESPACE_ERR: number;
+    readonly NETWORK_ERR: number;
+    readonly NO_DATA_ALLOWED_ERR: number;
+    readonly NO_MODIFICATION_ALLOWED_ERR: number;
+    readonly NOT_FOUND_ERR: number;
+    readonly NOT_SUPPORTED_ERR: number;
+    readonly PARSE_ERR: number;
+    readonly QUOTA_EXCEEDED_ERR: number;
+    readonly SECURITY_ERR: number;
+    readonly SERIALIZE_ERR: number;
+    readonly SYNTAX_ERR: number;
+    readonly TIMEOUT_ERR: number;
+    readonly TYPE_MISMATCH_ERR: number;
+    readonly URL_MISMATCH_ERR: number;
+    readonly VALIDATION_ERR: number;
+    readonly WRONG_DOCUMENT_ERR: number;
+}
+
+declare var DOMException: {
+    prototype: DOMException;
+    new(): DOMException;
+    readonly ABORT_ERR: number;
+    readonly DATA_CLONE_ERR: number;
+    readonly DOMSTRING_SIZE_ERR: number;
+    readonly HIERARCHY_REQUEST_ERR: number;
+    readonly INDEX_SIZE_ERR: number;
+    readonly INUSE_ATTRIBUTE_ERR: number;
+    readonly INVALID_ACCESS_ERR: number;
+    readonly INVALID_CHARACTER_ERR: number;
+    readonly INVALID_MODIFICATION_ERR: number;
+    readonly INVALID_NODE_TYPE_ERR: number;
+    readonly INVALID_STATE_ERR: number;
+    readonly NAMESPACE_ERR: number;
+    readonly NETWORK_ERR: number;
+    readonly NO_DATA_ALLOWED_ERR: number;
+    readonly NO_MODIFICATION_ALLOWED_ERR: number;
+    readonly NOT_FOUND_ERR: number;
+    readonly NOT_SUPPORTED_ERR: number;
+    readonly PARSE_ERR: number;
+    readonly QUOTA_EXCEEDED_ERR: number;
+    readonly SECURITY_ERR: number;
+    readonly SERIALIZE_ERR: number;
+    readonly SYNTAX_ERR: number;
+    readonly TIMEOUT_ERR: number;
+    readonly TYPE_MISMATCH_ERR: number;
+    readonly URL_MISMATCH_ERR: number;
+    readonly VALIDATION_ERR: number;
+    readonly WRONG_DOCUMENT_ERR: number;
+};
+
+interface DOMImplementation {
+    createDocument(namespaceURI: string | null, qualifiedName: string | null, doctype: DocumentType | null): Document;
+    createDocumentType(qualifiedName: string, publicId: string, systemId: string): DocumentType;
+    createHTMLDocument(title: string): Document;
+    hasFeature(feature: string | null, version: string | null): boolean;
+}
+
+declare var DOMImplementation: {
+    prototype: DOMImplementation;
+    new(): DOMImplementation;
+};
+
+interface DOMParser {
+    parseFromString(source: string, mimeType: string): Document;
+}
+
+declare var DOMParser: {
+    prototype: DOMParser;
+    new(): DOMParser;
+};
+
+interface DOMSettableTokenList extends DOMTokenList {
+    value: string;
+}
+
+declare var DOMSettableTokenList: {
+    prototype: DOMSettableTokenList;
+    new(): DOMSettableTokenList;
+};
+
+interface DOMStringList {
+    readonly length: number;
+    contains(str: string): boolean;
+    item(index: number): string | null;
+    [index: number]: string;
+}
+
+declare var DOMStringList: {
+    prototype: DOMStringList;
+    new(): DOMStringList;
+};
+
+interface DOMStringMap {
+    [name: string]: string | undefined;
+}
+
+declare var DOMStringMap: {
+    prototype: DOMStringMap;
+    new(): DOMStringMap;
+};
+
+interface DOMTokenList {
+    readonly length: number;
+    add(...token: string[]): void;
+    contains(token: string): boolean;
+    item(index: number): string;
+    remove(...token: string[]): void;
+    toggle(token: string, force?: boolean): boolean;
+    toString(): string;
+    [index: number]: string;
+}
+
+declare var DOMTokenList: {
+    prototype: DOMTokenList;
+    new(): DOMTokenList;
+};
+
+interface DragEvent extends MouseEvent {
+    readonly dataTransfer: DataTransfer;
+    initDragEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, ctrlKeyArg: boolean, altKeyArg: boolean, shiftKeyArg: boolean, metaKeyArg: boolean, buttonArg: number, relatedTargetArg: EventTarget, dataTransferArg: DataTransfer): void;
+    msConvertURL(file: File, targetType: string, targetURL?: string): void;
+}
+
+declare var DragEvent: {
+    prototype: DragEvent;
+    new(type: "drag" | "dragend" | "dragenter" | "dragexit" | "dragleave" | "dragover" | "dragstart" | "drop", dragEventInit?: { dataTransfer?: DataTransfer }): DragEvent;
+};
+
+interface DynamicsCompressorNode extends AudioNode {
+    readonly attack: AudioParam;
+    readonly knee: AudioParam;
+    readonly ratio: AudioParam;
+    readonly reduction: number;
+    readonly release: AudioParam;
+    readonly threshold: AudioParam;
+}
+
+declare var DynamicsCompressorNode: {
+    prototype: DynamicsCompressorNode;
+    new(): DynamicsCompressorNode;
+};
+
+interface ElementEventMap extends GlobalEventHandlersEventMap {
+    "ariarequest": Event;
+    "command": Event;
+    "gotpointercapture": PointerEvent;
+    "lostpointercapture": PointerEvent;
+    "MSGestureChange": MSGestureEvent;
+    "MSGestureDoubleTap": MSGestureEvent;
+    "MSGestureEnd": MSGestureEvent;
+    "MSGestureHold": MSGestureEvent;
+    "MSGestureStart": MSGestureEvent;
+    "MSGestureTap": MSGestureEvent;
+    "MSGotPointerCapture": MSPointerEvent;
+    "MSInertiaStart": MSGestureEvent;
+    "MSLostPointerCapture": MSPointerEvent;
+    "MSPointerCancel": MSPointerEvent;
+    "MSPointerDown": MSPointerEvent;
+    "MSPointerEnter": MSPointerEvent;
+    "MSPointerLeave": MSPointerEvent;
+    "MSPointerMove": MSPointerEvent;
+    "MSPointerOut": MSPointerEvent;
+    "MSPointerOver": MSPointerEvent;
+    "MSPointerUp": MSPointerEvent;
+    "touchcancel": TouchEvent;
+    "touchend": TouchEvent;
+    "touchmove": TouchEvent;
+    "touchstart": TouchEvent;
+    "webkitfullscreenchange": Event;
+    "webkitfullscreenerror": Event;
+}
+
+interface Element extends Node, GlobalEventHandlers, ElementTraversal, NodeSelector, ChildNode, ParentNode {
+    readonly classList: DOMTokenList;
+    className: string;
+    readonly clientHeight: number;
+    readonly clientLeft: number;
+    readonly clientTop: number;
+    readonly clientWidth: number;
+    id: string;
+    innerHTML: string;
+    msContentZoomFactor: number;
+    readonly msRegionOverflow: string;
+    onariarequest: (this: Element, ev: Event) => any;
+    oncommand: (this: Element, ev: Event) => any;
+    ongotpointercapture: (this: Element, ev: PointerEvent) => any;
+    onlostpointercapture: (this: Element, ev: PointerEvent) => any;
+    onmsgesturechange: (this: Element, ev: MSGestureEvent) => any;
+    onmsgesturedoubletap: (this: Element, ev: MSGestureEvent) => any;
+    onmsgestureend: (this: Element, ev: MSGestureEvent) => any;
+    onmsgesturehold: (this: Element, ev: MSGestureEvent) => any;
+    onmsgesturestart: (this: Element, ev: MSGestureEvent) => any;
+    onmsgesturetap: (this: Element, ev: MSGestureEvent) => any;
+    onmsgotpointercapture: (this: Element, ev: MSPointerEvent) => any;
+    onmsinertiastart: (this: Element, ev: MSGestureEvent) => any;
+    onmslostpointercapture: (this: Element, ev: MSPointerEvent) => any;
+    onmspointercancel: (this: Element, ev: MSPointerEvent) => any;
+    onmspointerdown: (this: Element, ev: MSPointerEvent) => any;
+    onmspointerenter: (this: Element, ev: MSPointerEvent) => any;
+    onmspointerleave: (this: Element, ev: MSPointerEvent) => any;
+    onmspointermove: (this: Element, ev: MSPointerEvent) => any;
+    onmspointerout: (this: Element, ev: MSPointerEvent) => any;
+    onmspointerover: (this: Element, ev: MSPointerEvent) => any;
+    onmspointerup: (this: Element, ev: MSPointerEvent) => any;
+    ontouchcancel: (ev: TouchEvent) => any;
+    ontouchend: (ev: TouchEvent) => any;
+    ontouchmove: (ev: TouchEvent) => any;
+    ontouchstart: (ev: TouchEvent) => any;
+    onwebkitfullscreenchange: (this: Element, ev: Event) => any;
+    onwebkitfullscreenerror: (this: Element, ev: Event) => any;
+    outerHTML: string;
+    readonly prefix: string | null;
+    readonly scrollHeight: number;
+    scrollLeft: number;
+    scrollTop: number;
+    readonly scrollWidth: number;
+    readonly tagName: string;
+    readonly assignedSlot: HTMLSlotElement | null;
+    slot: string;
+    readonly shadowRoot: ShadowRoot | null;
+    getAttribute(name: string): string | null;
+    getAttributeNode(name: string): Attr;
+    getAttributeNodeNS(namespaceURI: string, localName: string): Attr;
+    getAttributeNS(namespaceURI: string, localName: string): string;
+    getBoundingClientRect(): ClientRect;
+    getClientRects(): ClientRectList;
+    getElementsByTagName<K extends keyof ElementListTagNameMap>(name: K): ElementListTagNameMap[K];
+    getElementsByTagName(name: string): NodeListOf<Element>;
+    getElementsByTagNameNS(namespaceURI: "http://www.w3.org/1999/xhtml", localName: string): HTMLCollectionOf<HTMLElement>;
+    getElementsByTagNameNS(namespaceURI: "http://www.w3.org/2000/svg", localName: string): HTMLCollectionOf<SVGElement>;
+    getElementsByTagNameNS(namespaceURI: string, localName: string): HTMLCollectionOf<Element>;
+    hasAttribute(name: string): boolean;
+    hasAttributeNS(namespaceURI: string, localName: string): boolean;
+    msGetRegionContent(): MSRangeCollection;
+    msGetUntransformedBounds(): ClientRect;
+    msMatchesSelector(selectors: string): boolean;
+    msReleasePointerCapture(pointerId: number): void;
+    msSetPointerCapture(pointerId: number): void;
+    msZoomTo(args: MsZoomToOptions): void;
+    releasePointerCapture(pointerId: number): void;
+    removeAttribute(qualifiedName: string): void;
+    removeAttributeNode(oldAttr: Attr): Attr;
+    removeAttributeNS(namespaceURI: string, localName: string): void;
+    requestFullscreen(): void;
+    requestPointerLock(): void;
+    setAttribute(name: string, value: string): void;
+    setAttributeNode(newAttr: Attr): Attr;
+    setAttributeNodeNS(newAttr: Attr): Attr;
+    setAttributeNS(namespaceURI: string, qualifiedName: string, value: string): void;
+    setPointerCapture(pointerId: number): void;
+    webkitMatchesSelector(selectors: string): boolean;
+    webkitRequestFullscreen(): void;
+    webkitRequestFullScreen(): void;
+    getElementsByClassName(classNames: string): NodeListOf<Element>;
+    matches(selector: string): boolean;
+    closest(selector: string): Element | null;
+    scrollIntoView(arg?: boolean | ScrollIntoViewOptions): void;
+    scroll(options?: ScrollToOptions): void;
+    scroll(x: number, y: number): void;
+    scrollTo(options?: ScrollToOptions): void;
+    scrollTo(x: number, y: number): void;
+    scrollBy(options?: ScrollToOptions): void;
+    scrollBy(x: number, y: number): void;
+    insertAdjacentElement(position: InsertPosition, insertedElement: Element): Element | null;
+    insertAdjacentHTML(where: InsertPosition, html: string): void;
+    insertAdjacentText(where: InsertPosition, text: string): void;
+    attachShadow(shadowRootInitDict: ShadowRootInit): ShadowRoot;
+    addEventListener<K extends keyof ElementEventMap>(type: K, listener: (this: Element, ev: ElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var Element: {
+    prototype: Element;
+    new(): Element;
+};
+
+interface ErrorEvent extends Event {
+    readonly colno: number;
+    readonly error: any;
+    readonly filename: string;
+    readonly lineno: number;
+    readonly message: string;
+    initErrorEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, messageArg: string, filenameArg: string, linenoArg: number): void;
+}
+
+declare var ErrorEvent: {
+    prototype: ErrorEvent;
+    new(type: string, errorEventInitDict?: ErrorEventInit): ErrorEvent;
+};
+
+interface Event {
+    readonly bubbles: boolean;
+    readonly cancelable: boolean;
+    cancelBubble: boolean;
+    readonly currentTarget: EventTarget;
+    readonly defaultPrevented: boolean;
+    readonly eventPhase: number;
+    readonly isTrusted: boolean;
+    returnValue: boolean;
+    readonly srcElement: Element | null;
+    readonly target: EventTarget;
+    readonly timeStamp: number;
+    readonly type: string;
+    readonly scoped: boolean;
+    initEvent(eventTypeArg: string, canBubbleArg: boolean, cancelableArg: boolean): void;
+    preventDefault(): void;
+    stopImmediatePropagation(): void;
+    stopPropagation(): void;
+    deepPath(): EventTarget[];
+    readonly AT_TARGET: number;
+    readonly BUBBLING_PHASE: number;
+    readonly CAPTURING_PHASE: number;
+}
+
+declare var Event: {
+    prototype: Event;
+    new(typeArg: string, eventInitDict?: EventInit): Event;
+    readonly AT_TARGET: number;
+    readonly BUBBLING_PHASE: number;
+    readonly CAPTURING_PHASE: number;
+};
+
+interface EventTarget {
+    addEventListener(type: string, listener?: EventListenerOrEventListenerObject, options?: boolean | AddEventListenerOptions): void;
+    dispatchEvent(evt: Event): boolean;
+    removeEventListener(type: string, listener?: EventListenerOrEventListenerObject, options?: boolean | EventListenerOptions): void;
+}
+
+declare var EventTarget: {
+    prototype: EventTarget;
+    new(): EventTarget;
+};
+
+interface EXT_frag_depth {
+}
+
+declare var EXT_frag_depth: {
+    prototype: EXT_frag_depth;
+    new(): EXT_frag_depth;
+};
+
+interface EXT_texture_filter_anisotropic {
+    readonly MAX_TEXTURE_MAX_ANISOTROPY_EXT: number;
+    readonly TEXTURE_MAX_ANISOTROPY_EXT: number;
+}
+
+declare var EXT_texture_filter_anisotropic: {
+    prototype: EXT_texture_filter_anisotropic;
+    new(): EXT_texture_filter_anisotropic;
+    readonly MAX_TEXTURE_MAX_ANISOTROPY_EXT: number;
+    readonly TEXTURE_MAX_ANISOTROPY_EXT: number;
+};
+
+interface ExtensionScriptApis {
+    extensionIdToShortId(extensionId: string): number;
+    fireExtensionApiTelemetry(functionName: string, isSucceeded: boolean, isSupported: boolean): void;
+    genericFunction(routerAddress: any, parameters?: string, callbackId?: number): void;
+    genericSynchronousFunction(functionId: number, parameters?: string): string;
+    getExtensionId(): string;
+    registerGenericFunctionCallbackHandler(callbackHandler: any): void;
+    registerGenericPersistentCallbackHandler(callbackHandler: any): void;
+}
+
+declare var ExtensionScriptApis: {
+    prototype: ExtensionScriptApis;
+    new(): ExtensionScriptApis;
+};
+
+interface External {
+}
+
+declare var External: {
+    prototype: External;
+    new(): External;
+};
+
+interface File extends Blob {
+    readonly lastModifiedDate: any;
+    readonly name: string;
+    readonly webkitRelativePath: string;
+}
+
+declare var File: {
+    prototype: File;
+    new (parts: (ArrayBuffer | ArrayBufferView | Blob | string)[], filename: string, properties?: FilePropertyBag): File;
+};
+
+interface FileList {
+    readonly length: number;
+    item(index: number): File;
+    [index: number]: File;
+}
+
+declare var FileList: {
+    prototype: FileList;
+    new(): FileList;
+};
+
+interface FileReader extends EventTarget, MSBaseReader {
+    readonly error: DOMError;
+    readAsArrayBuffer(blob: Blob): void;
+    readAsBinaryString(blob: Blob): void;
+    readAsDataURL(blob: Blob): void;
+    readAsText(blob: Blob, encoding?: string): void;
+    addEventListener<K extends keyof MSBaseReaderEventMap>(type: K, listener: (this: FileReader, ev: MSBaseReaderEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var FileReader: {
+    prototype: FileReader;
+    new(): FileReader;
+};
+
+interface FocusEvent extends UIEvent {
+    readonly relatedTarget: EventTarget;
+    initFocusEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, relatedTargetArg: EventTarget): void;
+}
+
+declare var FocusEvent: {
+    prototype: FocusEvent;
+    new(typeArg: string, eventInitDict?: FocusEventInit): FocusEvent;
+};
+
+interface FocusNavigationEvent extends Event {
+    readonly navigationReason: NavigationReason;
+    readonly originHeight: number;
+    readonly originLeft: number;
+    readonly originTop: number;
+    readonly originWidth: number;
+    requestFocus(): void;
+}
+
+declare var FocusNavigationEvent: {
+    prototype: FocusNavigationEvent;
+    new(type: string, eventInitDict?: FocusNavigationEventInit): FocusNavigationEvent;
+};
+
+interface FormData {
+    append(name: string, value: string | Blob, fileName?: string): void;
+    delete(name: string): void;
+    get(name: string): FormDataEntryValue | null;
+    getAll(name: string): FormDataEntryValue[];
+    has(name: string): boolean;
+    set(name: string, value: string | Blob, fileName?: string): void;
+}
+
+declare var FormData: {
+    prototype: FormData;
+    new (form?: HTMLFormElement): FormData;
+};
+
+interface GainNode extends AudioNode {
+    readonly gain: AudioParam;
+}
+
+declare var GainNode: {
+    prototype: GainNode;
+    new(): GainNode;
+};
+
+interface Gamepad {
+    readonly axes: number[];
+    readonly buttons: GamepadButton[];
+    readonly connected: boolean;
+    readonly id: string;
+    readonly index: number;
+    readonly mapping: string;
+    readonly timestamp: number;
+}
+
+declare var Gamepad: {
+    prototype: Gamepad;
+    new(): Gamepad;
+};
+
+interface GamepadButton {
+    readonly pressed: boolean;
+    readonly value: number;
+}
+
+declare var GamepadButton: {
+    prototype: GamepadButton;
+    new(): GamepadButton;
+};
+
+interface GamepadEvent extends Event {
+    readonly gamepad: Gamepad;
+}
+
+declare var GamepadEvent: {
+    prototype: GamepadEvent;
+    new(typeArg: string, eventInitDict?: GamepadEventInit): GamepadEvent;
+};
+
+interface Geolocation {
+    clearWatch(watchId: number): void;
+    getCurrentPosition(successCallback: PositionCallback, errorCallback?: PositionErrorCallback, options?: PositionOptions): void;
+    watchPosition(successCallback: PositionCallback, errorCallback?: PositionErrorCallback, options?: PositionOptions): number;
+}
+
+declare var Geolocation: {
+    prototype: Geolocation;
+    new(): Geolocation;
+};
+
+interface HashChangeEvent extends Event {
+    readonly newURL: string | null;
+    readonly oldURL: string | null;
+}
+
+declare var HashChangeEvent: {
+    prototype: HashChangeEvent;
+    new(typeArg: string, eventInitDict?: HashChangeEventInit): HashChangeEvent;
+};
+
+interface Headers {
+    append(name: string, value: string): void;
+    delete(name: string): void;
+    forEach(callback: ForEachCallback): void;
+    get(name: string): string | null;
+    has(name: string): boolean;
+    set(name: string, value: string): void;
+}
+
+declare var Headers: {
+    prototype: Headers;
+    new(init?: any): Headers;
+};
+
+interface History {
+    readonly length: number;
+    readonly state: any;
+    scrollRestoration: ScrollRestoration;
+    back(): void;
+    forward(): void;
+    go(delta?: number): void;
+    pushState(data: any, title: string, url?: string | null): void;
+    replaceState(data: any, title: string, url?: string | null): void;
+}
+
+declare var History: {
+    prototype: History;
+    new(): History;
+};
+
+interface HTMLAllCollection {
+    readonly length: number;
+    item(nameOrIndex?: string): HTMLCollection | Element | null;
+    namedItem(name: string): HTMLCollection | Element | null;
+    [index: number]: Element;
+}
+
+declare var HTMLAllCollection: {
+    prototype: HTMLAllCollection;
+    new(): HTMLAllCollection;
+};
+
+interface HTMLAnchorElement extends HTMLElement {
+    /**
+     * Sets or retrieves the character set used to encode the object.
+     */
+    charset: string;
+    /**
+     * Sets or retrieves the coordinates of the object.
+     */
+    coords: string;
+    download: string;
+    /**
+     * Contains the anchor portion of the URL including the hash sign (#).
+     */
+    hash: string;
+    /**
+     * Contains the hostname and port values of the URL.
+     */
+    host: string;
+    /**
+     * Contains the hostname of a URL.
+     */
+    hostname: string;
+    /**
+     * Sets or retrieves a destination URL or an anchor point.
+     */
+    href: string;
+    /**
+     * Sets or retrieves the language code of the object.
+     */
+    hreflang: string;
+    Methods: string;
+    readonly mimeType: string;
+    /**
+     * Sets or retrieves the shape of the object.
+     */
+    name: string;
+    readonly nameProp: string;
+    /**
+     * Contains the pathname of the URL.
+     */
+    pathname: string;
+    /**
+     * Sets or retrieves the port number associated with a URL.
+     */
+    port: string;
+    /**
+     * Contains the protocol of the URL.
+     */
+    protocol: string;
+    readonly protocolLong: string;
+    /**
+     * Sets or retrieves the relationship between the object and the destination of the link.
+     */
+    rel: string;
+    /**
+     * Sets or retrieves the relationship between the object and the destination of the link.
+     */
+    rev: string;
+    /**
+     * Sets or retrieves the substring of the href property that follows the question mark.
+     */
+    search: string;
+    /**
+     * Sets or retrieves the shape of the object.
+     */
+    shape: string;
+    /**
+     * Sets or retrieves the window or frame at which to target content.
+     */
+    target: string;
+    /**
+     * Retrieves or sets the text of the object as a string.
+     */
+    text: string;
+    type: string;
+    urn: string;
+    /**
+     * Returns a string representation of an object.
+     */
+    toString(): string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLAnchorElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLAnchorElement: {
+    prototype: HTMLAnchorElement;
+    new(): HTMLAnchorElement;
+};
+
+interface HTMLAppletElement extends HTMLElement {
+    align: string;
+    /**
+     * Sets or retrieves a text alternative to the graphic.
+     */
+    alt: string;
+    /**
+     * Gets or sets the optional alternative HTML script to execute if the object fails to load.
+     */
+    altHtml: string;
+    /**
+     * Sets or retrieves a character string that can be used to implement your own archive functionality for the object.
+     */
+    archive: string;
+    /**
+     * Retrieves a string of the URL where the object tag can be found. This is often the href of the document that the object is in, or the value set by a base element.
+     */
+    readonly BaseHref: string;
+    border: string;
+    code: string;
+    /**
+     * Sets or retrieves the URL of the component.
+     */
+    codeBase: string;
+    /**
+     * Sets or retrieves the Internet media type for the code associated with the object.
+     */
+    codeType: string;
+    /**
+     * Address of a pointer to the document this page or frame contains. If there is no document, then null will be returned.
+     */
+    readonly contentDocument: Document;
+    /**
+     * Sets or retrieves the URL that references the data of the object.
+     */
+    data: string;
+    /**
+     * Sets or retrieves a character string that can be used to implement your own declare functionality for the object.
+     */
+    declare: boolean;
+    readonly form: HTMLFormElement;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: string;
+    hspace: number;
+    /**
+     * Sets or retrieves the shape of the object.
+     */
+    name: string;
+    object: string | null;
+    /**
+     * Sets or retrieves a message to be displayed while an object is loading.
+     */
+    standby: string;
+    /**
+     * Returns the content type of the object.
+     */
+    type: string;
+    /**
+     * Sets or retrieves the URL, often with a bookmark extension (#name), to use as a client-side image map.
+     */
+    useMap: string;
+    vspace: number;
+    width: number;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLAppletElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLAppletElement: {
+    prototype: HTMLAppletElement;
+    new(): HTMLAppletElement;
+};
+
+interface HTMLAreaElement extends HTMLElement {
+    /**
+     * Sets or retrieves a text alternative to the graphic.
+     */
+    alt: string;
+    /**
+     * Sets or retrieves the coordinates of the object.
+     */
+    coords: string;
+    download: string;
+    /**
+     * Sets or retrieves the subsection of the href property that follows the number sign (#).
+     */
+    hash: string;
+    /**
+     * Sets or retrieves the hostname and port number of the location or URL.
+     */
+    host: string;
+    /**
+     * Sets or retrieves the host name part of the location or URL.
+     */
+    hostname: string;
+    /**
+     * Sets or retrieves a destination URL or an anchor point.
+     */
+    href: string;
+    /**
+     * Sets or gets whether clicks in this region cause action.
+     */
+    noHref: boolean;
+    /**
+     * Sets or retrieves the file name or path specified by the object.
+     */
+    pathname: string;
+    /**
+     * Sets or retrieves the port number associated with a URL.
+     */
+    port: string;
+    /**
+     * Sets or retrieves the protocol portion of a URL.
+     */
+    protocol: string;
+    rel: string;
+    /**
+     * Sets or retrieves the substring of the href property that follows the question mark.
+     */
+    search: string;
+    /**
+     * Sets or retrieves the shape of the object.
+     */
+    shape: string;
+    /**
+     * Sets or retrieves the window or frame at which to target content.
+     */
+    target: string;
+    /**
+     * Returns a string representation of an object.
+     */
+    toString(): string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLAreaElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLAreaElement: {
+    prototype: HTMLAreaElement;
+    new(): HTMLAreaElement;
+};
+
+interface HTMLAreasCollection extends HTMLCollectionBase {
+}
+
+declare var HTMLAreasCollection: {
+    prototype: HTMLAreasCollection;
+    new(): HTMLAreasCollection;
+};
+
+interface HTMLAudioElement extends HTMLMediaElement {
+    addEventListener<K extends keyof HTMLMediaElementEventMap>(type: K, listener: (this: HTMLAudioElement, ev: HTMLMediaElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLAudioElement: {
+    prototype: HTMLAudioElement;
+    new(): HTMLAudioElement;
+};
+
+interface HTMLBaseElement extends HTMLElement {
+    /**
+     * Gets or sets the baseline URL on which relative links are based.
+     */
+    href: string;
+    /**
+     * Sets or retrieves the window or frame at which to target content.
+     */
+    target: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLBaseElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLBaseElement: {
+    prototype: HTMLBaseElement;
+    new(): HTMLBaseElement;
+};
+
+interface HTMLBaseFontElement extends HTMLElement, DOML2DeprecatedColorProperty {
+    /**
+     * Sets or retrieves the current typeface family.
+     */
+    face: string;
+    /**
+     * Sets or retrieves the font size of the object.
+     */
+    size: number;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLBaseFontElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLBaseFontElement: {
+    prototype: HTMLBaseFontElement;
+    new(): HTMLBaseFontElement;
+};
+
+interface HTMLBodyElementEventMap extends HTMLElementEventMap {
+    "afterprint": Event;
+    "beforeprint": Event;
+    "beforeunload": BeforeUnloadEvent;
+    "blur": FocusEvent;
+    "error": ErrorEvent;
+    "focus": FocusEvent;
+    "hashchange": HashChangeEvent;
+    "load": Event;
+    "message": MessageEvent;
+    "offline": Event;
+    "online": Event;
+    "orientationchange": Event;
+    "pagehide": PageTransitionEvent;
+    "pageshow": PageTransitionEvent;
+    "popstate": PopStateEvent;
+    "resize": UIEvent;
+    "scroll": UIEvent;
+    "storage": StorageEvent;
+    "unload": Event;
+}
+
+interface HTMLBodyElement extends HTMLElement {
+    aLink: any;
+    background: string;
+    bgColor: any;
+    bgProperties: string;
+    link: any;
+    noWrap: boolean;
+    onafterprint: (this: HTMLBodyElement, ev: Event) => any;
+    onbeforeprint: (this: HTMLBodyElement, ev: Event) => any;
+    onbeforeunload: (this: HTMLBodyElement, ev: BeforeUnloadEvent) => any;
+    onblur: (this: HTMLBodyElement, ev: FocusEvent) => any;
+    onerror: (this: HTMLBodyElement, ev: ErrorEvent) => any;
+    onfocus: (this: HTMLBodyElement, ev: FocusEvent) => any;
+    onhashchange: (this: HTMLBodyElement, ev: HashChangeEvent) => any;
+    onload: (this: HTMLBodyElement, ev: Event) => any;
+    onmessage: (this: HTMLBodyElement, ev: MessageEvent) => any;
+    onoffline: (this: HTMLBodyElement, ev: Event) => any;
+    ononline: (this: HTMLBodyElement, ev: Event) => any;
+    onorientationchange: (this: HTMLBodyElement, ev: Event) => any;
+    onpagehide: (this: HTMLBodyElement, ev: PageTransitionEvent) => any;
+    onpageshow: (this: HTMLBodyElement, ev: PageTransitionEvent) => any;
+    onpopstate: (this: HTMLBodyElement, ev: PopStateEvent) => any;
+    onresize: (this: HTMLBodyElement, ev: UIEvent) => any;
+    onscroll: (this: HTMLBodyElement, ev: UIEvent) => any;
+    onstorage: (this: HTMLBodyElement, ev: StorageEvent) => any;
+    onunload: (this: HTMLBodyElement, ev: Event) => any;
+    text: any;
+    vLink: any;
+    addEventListener<K extends keyof HTMLBodyElementEventMap>(type: K, listener: (this: HTMLBodyElement, ev: HTMLBodyElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLBodyElement: {
+    prototype: HTMLBodyElement;
+    new(): HTMLBodyElement;
+};
+
+interface HTMLBRElement extends HTMLElement {
+    /**
+     * Sets or retrieves the side on which floating objects are not to be positioned when any IHTMLBlockElement is inserted into the document.
+     */
+    clear: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLBRElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLBRElement: {
+    prototype: HTMLBRElement;
+    new(): HTMLBRElement;
+};
+
+interface HTMLButtonElement extends HTMLElement {
+    /**
+     * Provides a way to direct a user to a specific field when a document loads. This can provide both direction and convenience for a user, reducing the need to click or tab to a field when a page opens. This attribute is true when present on an element, and false when missing.
+     */
+    autofocus: boolean;
+    disabled: boolean;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Overrides the action attribute (where the data on a form is sent) on the parent form element.
+     */
+    formAction: string;
+    /**
+     * Used to override the encoding (formEnctype attribute) specified on the form element.
+     */
+    formEnctype: string;
+    /**
+     * Overrides the submit method attribute previously specified on a form element.
+     */
+    formMethod: string;
+    /**
+     * Overrides any validation or required attributes on a form or form elements to allow it to be submitted without validation. This can be used to create a "save draft"-type submit option.
+     */
+    formNoValidate: string;
+    /**
+     * Overrides the target attribute on a form element.
+     */
+    formTarget: string;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    status: any;
+    /**
+     * Gets the classification and default behavior of the button.
+     */
+    type: string;
+    /**
+     * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
+     */
+    readonly validationMessage: string;
+    /**
+     * Returns a  ValidityState object that represents the validity states of an element.
+     */
+    readonly validity: ValidityState;
+    /**
+     * Sets or retrieves the default or selected value of the control.
+     */
+    value: string;
+    /**
+     * Returns whether an element will successfully validate based on forms validation rules and constraints.
+     */
+    readonly willValidate: boolean;
+    /**
+     * Returns whether a form will validate when it is submitted, without having to submit it.
+     */
+    checkValidity(): boolean;
+    /**
+     * Sets a custom error message that is displayed when a form is submitted.
+     * @param error Sets a custom error message that is displayed when a form is submitted.
+     */
+    setCustomValidity(error: string): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLButtonElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLButtonElement: {
+    prototype: HTMLButtonElement;
+    new(): HTMLButtonElement;
+};
+
+interface HTMLCanvasElement extends HTMLElement {
+    /**
+     * Gets or sets the height of a canvas element on a document.
+     */
+    height: number;
+    /**
+     * Gets or sets the width of a canvas element on a document.
+     */
+    width: number;
+    /**
+     * Returns an object that provides methods and properties for drawing and manipulating images and graphics on a canvas element in a document. A context object includes information about colors, line widths, fonts, and other graphic parameters that can be drawn on a canvas.
+     * @param contextId The identifier (ID) of the type of canvas to create. Internet Explorer 9 and Internet Explorer 10 support only a 2-D context using canvas.getContext("2d"); IE11 Preview also supports 3-D or WebGL context using canvas.getContext("experimental-webgl");
+     */
+    getContext(contextId: "2d", contextAttributes?: Canvas2DContextAttributes): CanvasRenderingContext2D | null;
+    getContext(contextId: "webgl" | "experimental-webgl", contextAttributes?: WebGLContextAttributes): WebGLRenderingContext | null;
+    getContext(contextId: string, contextAttributes?: {}): CanvasRenderingContext2D | WebGLRenderingContext | null;
+    /**
+     * Returns a blob object encoded as a Portable Network Graphics (PNG) format from a canvas image or drawing.
+     */
+    msToBlob(): Blob;
+    /**
+     * Returns the content of the current canvas as an image that you can use as a source for another canvas or an HTML element.
+     * @param type The standard MIME type for the image format to return. If you do not specify this parameter, the default value is a PNG format image.
+     */
+    toDataURL(type?: string, ...args: any[]): string;
+    toBlob(callback: (result: Blob | null) => void, type?: string, ...arguments: any[]): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLCanvasElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLCanvasElement: {
+    prototype: HTMLCanvasElement;
+    new(): HTMLCanvasElement;
+};
+
+interface HTMLCollectionBase {
+    /**
+     * Sets or retrieves the number of objects in a collection.
+     */
+    readonly length: number;
+    /**
+     * Retrieves an object from various collections.
+     */
+    item(index: number): Element;
+    [index: number]: Element;
+}
+
+interface HTMLCollection extends HTMLCollectionBase {
+    /**
+     * Retrieves a select object or an object from an options collection.
+     */
+    namedItem(name: string): Element | null;
+}
+
+declare var HTMLCollection: {
+    prototype: HTMLCollection;
+    new(): HTMLCollection;
+};
+
+interface HTMLDataElement extends HTMLElement {
+    value: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLDataElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLDataElement: {
+    prototype: HTMLDataElement;
+    new(): HTMLDataElement;
+};
+
+interface HTMLDataListElement extends HTMLElement {
+    options: HTMLCollectionOf<HTMLOptionElement>;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLDataListElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLDataListElement: {
+    prototype: HTMLDataListElement;
+    new(): HTMLDataListElement;
+};
+
+interface HTMLDirectoryElement extends HTMLElement {
+    compact: boolean;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLDirectoryElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLDirectoryElement: {
+    prototype: HTMLDirectoryElement;
+    new(): HTMLDirectoryElement;
+};
+
+interface HTMLDivElement extends HTMLElement {
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    /**
+     * Sets or retrieves whether the browser automatically performs wordwrap.
+     */
+    noWrap: boolean;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLDivElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLDivElement: {
+    prototype: HTMLDivElement;
+    new(): HTMLDivElement;
+};
+
+interface HTMLDListElement extends HTMLElement {
+    compact: boolean;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLDListElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLDListElement: {
+    prototype: HTMLDListElement;
+    new(): HTMLDListElement;
+};
+
+interface HTMLDocument extends Document {
+    addEventListener<K extends keyof DocumentEventMap>(type: K, listener: (this: HTMLDocument, ev: DocumentEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLDocument: {
+    prototype: HTMLDocument;
+    new(): HTMLDocument;
+};
+
+interface HTMLElementEventMap extends ElementEventMap {
+    "abort": UIEvent;
+    "activate": UIEvent;
+    "beforeactivate": UIEvent;
+    "beforecopy": ClipboardEvent;
+    "beforecut": ClipboardEvent;
+    "beforedeactivate": UIEvent;
+    "beforepaste": ClipboardEvent;
+    "blur": FocusEvent;
+    "canplay": Event;
+    "canplaythrough": Event;
+    "change": Event;
+    "click": MouseEvent;
+    "contextmenu": PointerEvent;
+    "copy": ClipboardEvent;
+    "cuechange": Event;
+    "cut": ClipboardEvent;
+    "dblclick": MouseEvent;
+    "deactivate": UIEvent;
+    "drag": DragEvent;
+    "dragend": DragEvent;
+    "dragenter": DragEvent;
+    "dragleave": DragEvent;
+    "dragover": DragEvent;
+    "dragstart": DragEvent;
+    "drop": DragEvent;
+    "durationchange": Event;
+    "emptied": Event;
+    "ended": MediaStreamErrorEvent;
+    "error": ErrorEvent;
+    "focus": FocusEvent;
+    "input": Event;
+    "invalid": Event;
+    "keydown": KeyboardEvent;
+    "keypress": KeyboardEvent;
+    "keyup": KeyboardEvent;
+    "load": Event;
+    "loadeddata": Event;
+    "loadedmetadata": Event;
+    "loadstart": Event;
+    "mousedown": MouseEvent;
+    "mouseenter": MouseEvent;
+    "mouseleave": MouseEvent;
+    "mousemove": MouseEvent;
+    "mouseout": MouseEvent;
+    "mouseover": MouseEvent;
+    "mouseup": MouseEvent;
+    "mousewheel": WheelEvent;
+    "MSContentZoom": UIEvent;
+    "MSManipulationStateChanged": MSManipulationEvent;
+    "paste": ClipboardEvent;
+    "pause": Event;
+    "play": Event;
+    "playing": Event;
+    "progress": ProgressEvent;
+    "ratechange": Event;
+    "reset": Event;
+    "scroll": UIEvent;
+    "seeked": Event;
+    "seeking": Event;
+    "select": UIEvent;
+    "selectstart": Event;
+    "stalled": Event;
+    "submit": Event;
+    "suspend": Event;
+    "timeupdate": Event;
+    "volumechange": Event;
+    "waiting": Event;
+}
+
+interface HTMLElement extends Element {
+    accessKey: string;
+    readonly children: HTMLCollection;
+    contentEditable: string;
+    readonly dataset: DOMStringMap;
+    dir: string;
+    draggable: boolean;
+    hidden: boolean;
+    hideFocus: boolean;
+    innerText: string;
+    readonly isContentEditable: boolean;
+    lang: string;
+    readonly offsetHeight: number;
+    readonly offsetLeft: number;
+    readonly offsetParent: Element;
+    readonly offsetTop: number;
+    readonly offsetWidth: number;
+    onabort: (this: HTMLElement, ev: UIEvent) => any;
+    onactivate: (this: HTMLElement, ev: UIEvent) => any;
+    onbeforeactivate: (this: HTMLElement, ev: UIEvent) => any;
+    onbeforecopy: (this: HTMLElement, ev: ClipboardEvent) => any;
+    onbeforecut: (this: HTMLElement, ev: ClipboardEvent) => any;
+    onbeforedeactivate: (this: HTMLElement, ev: UIEvent) => any;
+    onbeforepaste: (this: HTMLElement, ev: ClipboardEvent) => any;
+    onblur: (this: HTMLElement, ev: FocusEvent) => any;
+    oncanplay: (this: HTMLElement, ev: Event) => any;
+    oncanplaythrough: (this: HTMLElement, ev: Event) => any;
+    onchange: (this: HTMLElement, ev: Event) => any;
+    onclick: (this: HTMLElement, ev: MouseEvent) => any;
+    oncontextmenu: (this: HTMLElement, ev: PointerEvent) => any;
+    oncopy: (this: HTMLElement, ev: ClipboardEvent) => any;
+    oncuechange: (this: HTMLElement, ev: Event) => any;
+    oncut: (this: HTMLElement, ev: ClipboardEvent) => any;
+    ondblclick: (this: HTMLElement, ev: MouseEvent) => any;
+    ondeactivate: (this: HTMLElement, ev: UIEvent) => any;
+    ondrag: (this: HTMLElement, ev: DragEvent) => any;
+    ondragend: (this: HTMLElement, ev: DragEvent) => any;
+    ondragenter: (this: HTMLElement, ev: DragEvent) => any;
+    ondragleave: (this: HTMLElement, ev: DragEvent) => any;
+    ondragover: (this: HTMLElement, ev: DragEvent) => any;
+    ondragstart: (this: HTMLElement, ev: DragEvent) => any;
+    ondrop: (this: HTMLElement, ev: DragEvent) => any;
+    ondurationchange: (this: HTMLElement, ev: Event) => any;
+    onemptied: (this: HTMLElement, ev: Event) => any;
+    onended: (this: HTMLElement, ev: MediaStreamErrorEvent) => any;
+    onerror: (this: HTMLElement, ev: ErrorEvent) => any;
+    onfocus: (this: HTMLElement, ev: FocusEvent) => any;
+    oninput: (this: HTMLElement, ev: Event) => any;
+    oninvalid: (this: HTMLElement, ev: Event) => any;
+    onkeydown: (this: HTMLElement, ev: KeyboardEvent) => any;
+    onkeypress: (this: HTMLElement, ev: KeyboardEvent) => any;
+    onkeyup: (this: HTMLElement, ev: KeyboardEvent) => any;
+    onload: (this: HTMLElement, ev: Event) => any;
+    onloadeddata: (this: HTMLElement, ev: Event) => any;
+    onloadedmetadata: (this: HTMLElement, ev: Event) => any;
+    onloadstart: (this: HTMLElement, ev: Event) => any;
+    onmousedown: (this: HTMLElement, ev: MouseEvent) => any;
+    onmouseenter: (this: HTMLElement, ev: MouseEvent) => any;
+    onmouseleave: (this: HTMLElement, ev: MouseEvent) => any;
+    onmousemove: (this: HTMLElement, ev: MouseEvent) => any;
+    onmouseout: (this: HTMLElement, ev: MouseEvent) => any;
+    onmouseover: (this: HTMLElement, ev: MouseEvent) => any;
+    onmouseup: (this: HTMLElement, ev: MouseEvent) => any;
+    onmousewheel: (this: HTMLElement, ev: WheelEvent) => any;
+    onmscontentzoom: (this: HTMLElement, ev: UIEvent) => any;
+    onmsmanipulationstatechanged: (this: HTMLElement, ev: MSManipulationEvent) => any;
+    onpaste: (this: HTMLElement, ev: ClipboardEvent) => any;
+    onpause: (this: HTMLElement, ev: Event) => any;
+    onplay: (this: HTMLElement, ev: Event) => any;
+    onplaying: (this: HTMLElement, ev: Event) => any;
+    onprogress: (this: HTMLElement, ev: ProgressEvent) => any;
+    onratechange: (this: HTMLElement, ev: Event) => any;
+    onreset: (this: HTMLElement, ev: Event) => any;
+    onscroll: (this: HTMLElement, ev: UIEvent) => any;
+    onseeked: (this: HTMLElement, ev: Event) => any;
+    onseeking: (this: HTMLElement, ev: Event) => any;
+    onselect: (this: HTMLElement, ev: UIEvent) => any;
+    onselectstart: (this: HTMLElement, ev: Event) => any;
+    onstalled: (this: HTMLElement, ev: Event) => any;
+    onsubmit: (this: HTMLElement, ev: Event) => any;
+    onsuspend: (this: HTMLElement, ev: Event) => any;
+    ontimeupdate: (this: HTMLElement, ev: Event) => any;
+    onvolumechange: (this: HTMLElement, ev: Event) => any;
+    onwaiting: (this: HTMLElement, ev: Event) => any;
+    outerText: string;
+    spellcheck: boolean;
+    readonly style: CSSStyleDeclaration;
+    tabIndex: number;
+    title: string;
+    blur(): void;
+    click(): void;
+    dragDrop(): boolean;
+    focus(): void;
+    msGetInputContext(): MSInputMethodContext;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLElement: {
+    prototype: HTMLElement;
+    new(): HTMLElement;
+};
+
+interface HTMLEmbedElement extends HTMLElement, GetSVGDocument {
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: string;
+    hidden: any;
+    /**
+     * Gets or sets whether the DLNA PlayTo device is available.
+     */
+    msPlayToDisabled: boolean;
+    /**
+     * Gets or sets the path to the preferred media source. This enables the Play To target device to stream the media content, which can be DRM protected, from a different location, such as a cloud media server.
+     */
+    msPlayToPreferredSourceUri: string;
+    /**
+     * Gets or sets the primary DLNA PlayTo device.
+     */
+    msPlayToPrimary: boolean;
+    /**
+     * Gets the source associated with the media element for use by the PlayToManager.
+     */
+    readonly msPlayToSource: any;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    /**
+     * Retrieves the palette used for the embedded document.
+     */
+    readonly palette: string;
+    /**
+     * Retrieves the URL of the plug-in used to view an embedded document.
+     */
+    readonly pluginspage: string;
+    readonly readyState: string;
+    /**
+     * Sets or retrieves a URL to be loaded by the object.
+     */
+    src: string;
+    /**
+     * Sets or retrieves the height and width units of the embed object.
+     */
+    units: string;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLEmbedElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLEmbedElement: {
+    prototype: HTMLEmbedElement;
+    new(): HTMLEmbedElement;
+};
+
+interface HTMLFieldSetElement extends HTMLElement {
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    disabled: boolean;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    name: string;
+    /**
+     * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
+     */
+    readonly validationMessage: string;
+    /**
+     * Returns a  ValidityState object that represents the validity states of an element.
+     */
+    readonly validity: ValidityState;
+    /**
+     * Returns whether an element will successfully validate based on forms validation rules and constraints.
+     */
+    readonly willValidate: boolean;
+    /**
+     * Returns whether a form will validate when it is submitted, without having to submit it.
+     */
+    checkValidity(): boolean;
+    /**
+     * Sets a custom error message that is displayed when a form is submitted.
+     * @param error Sets a custom error message that is displayed when a form is submitted.
+     */
+    setCustomValidity(error: string): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLFieldSetElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLFieldSetElement: {
+    prototype: HTMLFieldSetElement;
+    new(): HTMLFieldSetElement;
+};
+
+interface HTMLFontElement extends HTMLElement, DOML2DeprecatedColorProperty, DOML2DeprecatedSizeProperty {
+    /**
+     * Sets or retrieves the current typeface family.
+     */
+    face: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLFontElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLFontElement: {
+    prototype: HTMLFontElement;
+    new(): HTMLFontElement;
+};
+
+interface HTMLFormControlsCollection extends HTMLCollectionBase {
+    namedItem(name: string): HTMLCollection | Element | null;
+}
+
+declare var HTMLFormControlsCollection: {
+    prototype: HTMLFormControlsCollection;
+    new(): HTMLFormControlsCollection;
+};
+
+interface HTMLFormElement extends HTMLElement {
+    /**
+     * Sets or retrieves a list of character encodings for input data that must be accepted by the server processing the form.
+     */
+    acceptCharset: string;
+    /**
+     * Sets or retrieves the URL to which the form content is sent for processing.
+     */
+    action: string;
+    /**
+     * Specifies whether autocomplete is applied to an editable text field.
+     */
+    autocomplete: string;
+    /**
+     * Retrieves a collection, in source order, of all controls in a given form.
+     */
+    readonly elements: HTMLFormControlsCollection;
+    /**
+     * Sets or retrieves the MIME encoding for the form.
+     */
+    encoding: string;
+    /**
+     * Sets or retrieves the encoding type for the form.
+     */
+    enctype: string;
+    /**
+     * Sets or retrieves the number of objects in a collection.
+     */
+    readonly length: number;
+    /**
+     * Sets or retrieves how to send the form data to the server.
+     */
+    method: string;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    /**
+     * Designates a form that is not validated when submitted.
+     */
+    noValidate: boolean;
+    /**
+     * Sets or retrieves the window or frame at which to target content.
+     */
+    target: string;
+    /**
+     * Returns whether a form will validate when it is submitted, without having to submit it.
+     */
+    checkValidity(): boolean;
+    /**
+     * Retrieves a form object or an object from an elements collection.
+     * @param name Variant of type Number or String that specifies the object or collection to retrieve. If this parameter is a Number, it is the zero-based index of the object. If this parameter is a string, all objects with matching name or id properties are retrieved, and a collection is returned if more than one match is made.
+     * @param index Variant of type Number that specifies the zero-based index of the object to retrieve when a collection is returned.
+     */
+    item(name?: any, index?: any): any;
+    /**
+     * Retrieves a form object or an object from an elements collection.
+     */
+    namedItem(name: string): any;
+    /**
+     * Fires when the user resets a form.
+     */
+    reset(): void;
+    /**
+     * Fires when a FORM is about to be submitted.
+     */
+    submit(): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLFormElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+    [name: string]: any;
+}
+
+declare var HTMLFormElement: {
+    prototype: HTMLFormElement;
+    new(): HTMLFormElement;
+};
+
+interface HTMLFrameElementEventMap extends HTMLElementEventMap {
+    "load": Event;
+}
+
+interface HTMLFrameElement extends HTMLElement, GetSVGDocument {
+    /**
+     * Specifies the properties of a border drawn around an object.
+     */
+    border: string;
+    /**
+     * Sets or retrieves the border color of the object.
+     */
+    borderColor: any;
+    /**
+     * Retrieves the document object of the page or frame.
+     */
+    readonly contentDocument: Document;
+    /**
+     * Retrieves the object of the specified.
+     */
+    readonly contentWindow: Window;
+    /**
+     * Sets or retrieves whether to display a border for the frame.
+     */
+    frameBorder: string;
+    /**
+     * Sets or retrieves the amount of additional space between the frames.
+     */
+    frameSpacing: any;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: string | number;
+    /**
+     * Sets or retrieves a URI to a long description of the object.
+     */
+    longDesc: string;
+    /**
+     * Sets or retrieves the top and bottom margin heights before displaying the text in a frame.
+     */
+    marginHeight: string;
+    /**
+     * Sets or retrieves the left and right margin widths before displaying the text in a frame.
+     */
+    marginWidth: string;
+    /**
+     * Sets or retrieves the frame name.
+     */
+    name: string;
+    /**
+     * Sets or retrieves whether the user can resize the frame.
+     */
+    noResize: boolean;
+    /**
+     * Raised when the object has been completely received from the server.
+     */
+    onload: (this: HTMLFrameElement, ev: Event) => any;
+    /**
+     * Sets or retrieves whether the frame can be scrolled.
+     */
+    scrolling: string;
+    /**
+     * Sets or retrieves a URL to be loaded by the object.
+     */
+    src: string;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: string | number;
+    addEventListener<K extends keyof HTMLFrameElementEventMap>(type: K, listener: (this: HTMLFrameElement, ev: HTMLFrameElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLFrameElement: {
+    prototype: HTMLFrameElement;
+    new(): HTMLFrameElement;
+};
+
+interface HTMLFrameSetElementEventMap extends HTMLElementEventMap {
+    "afterprint": Event;
+    "beforeprint": Event;
+    "beforeunload": BeforeUnloadEvent;
+    "blur": FocusEvent;
+    "error": ErrorEvent;
+    "focus": FocusEvent;
+    "hashchange": HashChangeEvent;
+    "load": Event;
+    "message": MessageEvent;
+    "offline": Event;
+    "online": Event;
+    "orientationchange": Event;
+    "pagehide": PageTransitionEvent;
+    "pageshow": PageTransitionEvent;
+    "popstate": PopStateEvent;
+    "resize": UIEvent;
+    "scroll": UIEvent;
+    "storage": StorageEvent;
+    "unload": Event;
+}
+
+interface HTMLFrameSetElement extends HTMLElement {
+    border: string;
+    /**
+     * Sets or retrieves the border color of the object.
+     */
+    borderColor: any;
+    /**
+     * Sets or retrieves the frame widths of the object.
+     */
+    cols: string;
+    /**
+     * Sets or retrieves whether to display a border for the frame.
+     */
+    frameBorder: string;
+    /**
+     * Sets or retrieves the amount of additional space between the frames.
+     */
+    frameSpacing: any;
+    name: string;
+    onafterprint: (this: HTMLFrameSetElement, ev: Event) => any;
+    onbeforeprint: (this: HTMLFrameSetElement, ev: Event) => any;
+    onbeforeunload: (this: HTMLFrameSetElement, ev: BeforeUnloadEvent) => any;
+    /**
+     * Fires when the object loses the input focus.
+     */
+    onblur: (this: HTMLFrameSetElement, ev: FocusEvent) => any;
+    onerror: (this: HTMLFrameSetElement, ev: ErrorEvent) => any;
+    /**
+     * Fires when the object receives focus.
+     */
+    onfocus: (this: HTMLFrameSetElement, ev: FocusEvent) => any;
+    onhashchange: (this: HTMLFrameSetElement, ev: HashChangeEvent) => any;
+    onload: (this: HTMLFrameSetElement, ev: Event) => any;
+    onmessage: (this: HTMLFrameSetElement, ev: MessageEvent) => any;
+    onoffline: (this: HTMLFrameSetElement, ev: Event) => any;
+    ononline: (this: HTMLFrameSetElement, ev: Event) => any;
+    onorientationchange: (this: HTMLFrameSetElement, ev: Event) => any;
+    onpagehide: (this: HTMLFrameSetElement, ev: PageTransitionEvent) => any;
+    onpageshow: (this: HTMLFrameSetElement, ev: PageTransitionEvent) => any;
+    onpopstate: (this: HTMLFrameSetElement, ev: PopStateEvent) => any;
+    onresize: (this: HTMLFrameSetElement, ev: UIEvent) => any;
+    onscroll: (this: HTMLFrameSetElement, ev: UIEvent) => any;
+    onstorage: (this: HTMLFrameSetElement, ev: StorageEvent) => any;
+    onunload: (this: HTMLFrameSetElement, ev: Event) => any;
+    /**
+     * Sets or retrieves the frame heights of the object.
+     */
+    rows: string;
+    addEventListener<K extends keyof HTMLFrameSetElementEventMap>(type: K, listener: (this: HTMLFrameSetElement, ev: HTMLFrameSetElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLFrameSetElement: {
+    prototype: HTMLFrameSetElement;
+    new(): HTMLFrameSetElement;
+};
+
+interface HTMLHeadElement extends HTMLElement {
+    profile: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLHeadElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLHeadElement: {
+    prototype: HTMLHeadElement;
+    new(): HTMLHeadElement;
+};
+
+interface HTMLHeadingElement extends HTMLElement {
+    /**
+     * Sets or retrieves a value that indicates the table alignment.
+     */
+    align: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLHeadingElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLHeadingElement: {
+    prototype: HTMLHeadingElement;
+    new(): HTMLHeadingElement;
+};
+
+interface HTMLHRElement extends HTMLElement, DOML2DeprecatedColorProperty, DOML2DeprecatedSizeProperty {
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    /**
+     * Sets or retrieves whether the horizontal rule is drawn with 3-D shading.
+     */
+    noShade: boolean;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: number;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLHRElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLHRElement: {
+    prototype: HTMLHRElement;
+    new(): HTMLHRElement;
+};
+
+interface HTMLHtmlElement extends HTMLElement {
+    /**
+     * Sets or retrieves the DTD version that governs the current document.
+     */
+    version: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLHtmlElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLHtmlElement: {
+    prototype: HTMLHtmlElement;
+    new(): HTMLHtmlElement;
+};
+
+interface HTMLIFrameElementEventMap extends HTMLElementEventMap {
+    "load": Event;
+}
+
+interface HTMLIFrameElement extends HTMLElement, GetSVGDocument {
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    allowFullscreen: boolean;
+    allowPaymentRequest: boolean;
+    /**
+     * Specifies the properties of a border drawn around an object.
+     */
+    border: string;
+    /**
+     * Retrieves the document object of the page or frame.
+     */
+    readonly contentDocument: Document;
+    /**
+     * Retrieves the object of the specified.
+     */
+    readonly contentWindow: Window;
+    /**
+     * Sets or retrieves whether to display a border for the frame.
+     */
+    frameBorder: string;
+    /**
+     * Sets or retrieves the amount of additional space between the frames.
+     */
+    frameSpacing: any;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: string;
+    /**
+     * Sets or retrieves the horizontal margin for the object.
+     */
+    hspace: number;
+    /**
+     * Sets or retrieves a URI to a long description of the object.
+     */
+    longDesc: string;
+    /**
+     * Sets or retrieves the top and bottom margin heights before displaying the text in a frame.
+     */
+    marginHeight: string;
+    /**
+     * Sets or retrieves the left and right margin widths before displaying the text in a frame.
+     */
+    marginWidth: string;
+    /**
+     * Sets or retrieves the frame name.
+     */
+    name: string;
+    /**
+     * Sets or retrieves whether the user can resize the frame.
+     */
+    noResize: boolean;
+    /**
+     * Raised when the object has been completely received from the server.
+     */
+    onload: (this: HTMLIFrameElement, ev: Event) => any;
+    readonly sandbox: DOMSettableTokenList;
+    /**
+     * Sets or retrieves whether the frame can be scrolled.
+     */
+    scrolling: string;
+    /**
+     * Sets or retrieves a URL to be loaded by the object.
+     */
+    src: string;
+    /**
+     * Sets or retrieves the vertical margin for the object.
+     */
+    vspace: number;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: string;
+    addEventListener<K extends keyof HTMLIFrameElementEventMap>(type: K, listener: (this: HTMLIFrameElement, ev: HTMLIFrameElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLIFrameElement: {
+    prototype: HTMLIFrameElement;
+    new(): HTMLIFrameElement;
+};
+
+interface HTMLImageElement extends HTMLElement {
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    /**
+     * Sets or retrieves a text alternative to the graphic.
+     */
+    alt: string;
+    /**
+     * Specifies the properties of a border drawn around an object.
+     */
+    border: string;
+    /**
+     * Retrieves whether the object is fully loaded.
+     */
+    readonly complete: boolean;
+    crossOrigin: string | null;
+    readonly currentSrc: string;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: number;
+    /**
+     * Sets or retrieves the width of the border to draw around the object.
+     */
+    hspace: number;
+    /**
+     * Sets or retrieves whether the image is a server-side image map.
+     */
+    isMap: boolean;
+    /**
+     * Sets or retrieves a Uniform Resource Identifier (URI) to a long description of the object.
+     */
+    longDesc: string;
+    lowsrc: string;
+    /**
+     * Gets or sets whether the DLNA PlayTo device is available.
+     */
+    msPlayToDisabled: boolean;
+    msPlayToPreferredSourceUri: string;
+    /**
+     * Gets or sets the primary DLNA PlayTo device.
+     */
+    msPlayToPrimary: boolean;
+    /**
+     * Gets the source associated with the media element for use by the PlayToManager.
+     */
+    readonly msPlayToSource: any;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    /**
+     * The original height of the image resource before sizing.
+     */
+    readonly naturalHeight: number;
+    /**
+     * The original width of the image resource before sizing.
+     */
+    readonly naturalWidth: number;
+    sizes: string;
+    /**
+     * The address or URL of the a media resource that is to be considered.
+     */
+    src: string;
+    srcset: string;
+    /**
+     * Sets or retrieves the URL, often with a bookmark extension (#name), to use as a client-side image map.
+     */
+    useMap: string;
+    /**
+     * Sets or retrieves the vertical margin for the object.
+     */
+    vspace: number;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: number;
+    readonly x: number;
+    readonly y: number;
+    msGetAsCastingSource(): any;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLImageElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLImageElement: {
+    prototype: HTMLImageElement;
+    new(): HTMLImageElement;
+};
+
+interface HTMLInputElement extends HTMLElement {
+    /**
+     * Sets or retrieves a comma-separated list of content types.
+     */
+    accept: string;
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    /**
+     * Sets or retrieves a text alternative to the graphic.
+     */
+    alt: string;
+    /**
+     * Specifies whether autocomplete is applied to an editable text field.
+     */
+    autocomplete: string;
+    /**
+     * Provides a way to direct a user to a specific field when a document loads. This can provide both direction and convenience for a user, reducing the need to click or tab to a field when a page opens. This attribute is true when present on an element, and false when missing.
+     */
+    autofocus: boolean;
+    /**
+     * Sets or retrieves the width of the border to draw around the object.
+     */
+    border: string;
+    /**
+     * Sets or retrieves the state of the check box or radio button.
+     */
+    checked: boolean;
+    /**
+     * Retrieves whether the object is fully loaded.
+     */
+    readonly complete: boolean;
+    /**
+     * Sets or retrieves the state of the check box or radio button.
+     */
+    defaultChecked: boolean;
+    /**
+     * Sets or retrieves the initial contents of the object.
+     */
+    defaultValue: string;
+    disabled: boolean;
+    /**
+     * Returns a FileList object on a file type input object.
+     */
+    readonly files: FileList | null;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Overrides the action attribute (where the data on a form is sent) on the parent form element.
+     */
+    formAction: string;
+    /**
+     * Used to override the encoding (formEnctype attribute) specified on the form element.
+     */
+    formEnctype: string;
+    /**
+     * Overrides the submit method attribute previously specified on a form element.
+     */
+    formMethod: string;
+    /**
+     * Overrides any validation or required attributes on a form or form elements to allow it to be submitted without validation. This can be used to create a "save draft"-type submit option.
+     */
+    formNoValidate: string;
+    /**
+     * Overrides the target attribute on a form element.
+     */
+    formTarget: string;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: string;
+    /**
+     * Sets or retrieves the width of the border to draw around the object.
+     */
+    hspace: number;
+    indeterminate: boolean;
+    /**
+     * Specifies the ID of a pre-defined datalist of options for an input element.
+     */
+    readonly list: HTMLElement;
+    /**
+     * Defines the maximum acceptable value for an input element with type="number".When used with the min and step attributes, lets you control the range and increment (such as only even numbers) that the user can enter into an input field.
+     */
+    max: string;
+    /**
+     * Sets or retrieves the maximum number of characters that the user can enter in a text control.
+     */
+    maxLength: number;
+    /**
+     * Defines the minimum acceptable value for an input element with type="number". When used with the max and step attributes, lets you control the range and increment (such as even numbers only) that the user can enter into an input field.
+     */
+    min: string;
+    /**
+     * Sets or retrieves the Boolean value indicating whether multiple items can be selected from a list.
+     */
+    multiple: boolean;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    /**
+     * Gets or sets a string containing a regular expression that the user's input must match.
+     */
+    pattern: string;
+    /**
+     * Gets or sets a text string that is displayed in an input field as a hint or prompt to users as the format or type of information they need to enter.The text appears in an input field until the user puts focus on the field.
+     */
+    placeholder: string;
+    readOnly: boolean;
+    /**
+     * When present, marks an element that can't be submitted without a value.
+     */
+    required: boolean;
+    selectionDirection: string;
+    /**
+     * Gets or sets the end position or offset of a text selection.
+     */
+    selectionEnd: number;
+    /**
+     * Gets or sets the starting position or offset of a text selection.
+     */
+    selectionStart: number;
+    size: number;
+    /**
+     * The address or URL of the a media resource that is to be considered.
+     */
+    src: string;
+    status: boolean;
+    /**
+     * Defines an increment or jump between values that you want to allow the user to enter. When used with the max and min attributes, lets you control the range and increment (for example, allow only even numbers) that the user can enter into an input field.
+     */
+    step: string;
+    /**
+     * Returns the content type of the object.
+     */
+    type: string;
+    /**
+     * Sets or retrieves the URL, often with a bookmark extension (#name), to use as a client-side image map.
+     */
+    useMap: string;
+    /**
+     * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
+     */
+    readonly validationMessage: string;
+    /**
+     * Returns a  ValidityState object that represents the validity states of an element.
+     */
+    readonly validity: ValidityState;
+    /**
+     * Returns the value of the data at the cursor's current position.
+     */
+    value: string;
+    valueAsDate: Date;
+    /**
+     * Returns the input field value as a number.
+     */
+    valueAsNumber: number;
+    /**
+     * Sets or retrieves the vertical margin for the object.
+     */
+    vspace: number;
+    webkitdirectory: boolean;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: string;
+    /**
+     * Returns whether an element will successfully validate based on forms validation rules and constraints.
+     */
+    readonly willValidate: boolean;
+    minLength: number;
+    /**
+     * Returns whether a form will validate when it is submitted, without having to submit it.
+     */
+    checkValidity(): boolean;
+    /**
+     * Makes the selection equal to the current object.
+     */
+    select(): void;
+    /**
+     * Sets a custom error message that is displayed when a form is submitted.
+     * @param error Sets a custom error message that is displayed when a form is submitted.
+     */
+    setCustomValidity(error: string): void;
+    /**
+     * Sets the start and end positions of a selection in a text field.
+     * @param start The offset into the text field for the start of the selection.
+     * @param end The offset into the text field for the end of the selection.
+     */
+    setSelectionRange(start?: number, end?: number, direction?: string): void;
+    /**
+     * Decrements a range input control's value by the value given by the Step attribute. If the optional parameter is used, it will decrement the input control's step value multiplied by the parameter's value.
+     * @param n Value to decrement the value by.
+     */
+    stepDown(n?: number): void;
+    /**
+     * Increments a range input control's value by the value given by the Step attribute. If the optional parameter is used, will increment the input control's value by that value.
+     * @param n Value to increment the value by.
+     */
+    stepUp(n?: number): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLInputElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLInputElement: {
+    prototype: HTMLInputElement;
+    new(): HTMLInputElement;
+};
+
+interface HTMLLabelElement extends HTMLElement {
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Sets or retrieves the object to which the given label object is assigned.
+     */
+    htmlFor: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLLabelElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLLabelElement: {
+    prototype: HTMLLabelElement;
+    new(): HTMLLabelElement;
+};
+
+interface HTMLLegendElement extends HTMLElement {
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    align: string;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLLegendElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLLegendElement: {
+    prototype: HTMLLegendElement;
+    new(): HTMLLegendElement;
+};
+
+interface HTMLLIElement extends HTMLElement {
+    type: string;
+    /**
+     * Sets or retrieves the value of a list item.
+     */
+    value: number;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLLIElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLLIElement: {
+    prototype: HTMLLIElement;
+    new(): HTMLLIElement;
+};
+
+interface HTMLLinkElement extends HTMLElement, LinkStyle {
+    /**
+     * Sets or retrieves the character set used to encode the object.
+     */
+    charset: string;
+    disabled: boolean;
+    /**
+     * Sets or retrieves a destination URL or an anchor point.
+     */
+    href: string;
+    /**
+     * Sets or retrieves the language code of the object.
+     */
+    hreflang: string;
+    /**
+     * Sets or retrieves the media type.
+     */
+    media: string;
+    /**
+     * Sets or retrieves the relationship between the object and the destination of the link.
+     */
+    rel: string;
+    /**
+     * Sets or retrieves the relationship between the object and the destination of the link.
+     */
+    rev: string;
+    /**
+     * Sets or retrieves the window or frame at which to target content.
+     */
+    target: string;
+    /**
+     * Sets or retrieves the MIME type of the object.
+     */
+    type: string;
+    import?: Document;
+    integrity: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLLinkElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLLinkElement: {
+    prototype: HTMLLinkElement;
+    new(): HTMLLinkElement;
+};
+
+interface HTMLMapElement extends HTMLElement {
+    /**
+     * Retrieves a collection of the area objects defined for the given map object.
+     */
+    readonly areas: HTMLAreasCollection;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLMapElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLMapElement: {
+    prototype: HTMLMapElement;
+    new(): HTMLMapElement;
+};
+
+interface HTMLMarqueeElementEventMap extends HTMLElementEventMap {
+    "bounce": Event;
+    "finish": Event;
+    "start": Event;
+}
+
+interface HTMLMarqueeElement extends HTMLElement {
+    behavior: string;
+    bgColor: any;
+    direction: string;
+    height: string;
+    hspace: number;
+    loop: number;
+    onbounce: (this: HTMLMarqueeElement, ev: Event) => any;
+    onfinish: (this: HTMLMarqueeElement, ev: Event) => any;
+    onstart: (this: HTMLMarqueeElement, ev: Event) => any;
+    scrollAmount: number;
+    scrollDelay: number;
+    trueSpeed: boolean;
+    vspace: number;
+    width: string;
+    start(): void;
+    stop(): void;
+    addEventListener<K extends keyof HTMLMarqueeElementEventMap>(type: K, listener: (this: HTMLMarqueeElement, ev: HTMLMarqueeElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLMarqueeElement: {
+    prototype: HTMLMarqueeElement;
+    new(): HTMLMarqueeElement;
+};
+
+interface HTMLMediaElementEventMap extends HTMLElementEventMap {
+    "encrypted": MediaEncryptedEvent;
+    "msneedkey": MSMediaKeyNeededEvent;
+}
+
+interface HTMLMediaElement extends HTMLElement {
+    /**
+     * Returns an AudioTrackList object with the audio tracks for a given video element.
+     */
+    readonly audioTracks: AudioTrackList;
+    /**
+     * Gets or sets a value that indicates whether to start playing the media automatically.
+     */
+    autoplay: boolean;
+    /**
+     * Gets a collection of buffered time ranges.
+     */
+    readonly buffered: TimeRanges;
+    /**
+     * Gets or sets a flag that indicates whether the client provides a set of controls for the media (in case the developer does not include controls for the player).
+     */
+    controls: boolean;
+    crossOrigin: string | null;
+    /**
+     * Gets the address or URL of the current media resource that is selected by IHTMLMediaElement.
+     */
+    readonly currentSrc: string;
+    /**
+     * Gets or sets the current playback position, in seconds.
+     */
+    currentTime: number;
+    defaultMuted: boolean;
+    /**
+     * Gets or sets the default playback rate when the user is not using fast forward or reverse for a video or audio resource.
+     */
+    defaultPlaybackRate: number;
+    /**
+     * Returns the duration in seconds of the current media resource. A NaN value is returned if duration is not available, or Infinity if the media resource is streaming.
+     */
+    readonly duration: number;
+    /**
+     * Gets information about whether the playback has ended or not.
+     */
+    readonly ended: boolean;
+    /**
+     * Returns an object representing the current error state of the audio or video element.
+     */
+    readonly error: MediaError;
+    /**
+     * Gets or sets a flag to specify whether playback should restart after it completes.
+     */
+    loop: boolean;
+    readonly mediaKeys: MediaKeys | null;
+    /**
+     * Specifies the purpose of the audio or video media, such as background audio or alerts.
+     */
+    msAudioCategory: string;
+    /**
+     * Specifies the output device id that the audio will be sent to.
+     */
+    msAudioDeviceType: string;
+    readonly msGraphicsTrustStatus: MSGraphicsTrust;
+    /**
+     * Gets the MSMediaKeys object, which is used for decrypting media data, that is associated with this media element.
+     */
+    readonly msKeys: MSMediaKeys;
+    /**
+     * Gets or sets whether the DLNA PlayTo device is available.
+     */
+    msPlayToDisabled: boolean;
+    /**
+     * Gets or sets the path to the preferred media source. This enables the Play To target device to stream the media content, which can be DRM protected, from a different location, such as a cloud media server.
+     */
+    msPlayToPreferredSourceUri: string;
+    /**
+     * Gets or sets the primary DLNA PlayTo device.
+     */
+    msPlayToPrimary: boolean;
+    /**
+     * Gets the source associated with the media element for use by the PlayToManager.
+     */
+    readonly msPlayToSource: any;
+    /**
+     * Specifies whether or not to enable low-latency playback on the media element.
+     */
+    msRealTime: boolean;
+    /**
+     * Gets or sets a flag that indicates whether the audio (either audio or the audio track on video media) is muted.
+     */
+    muted: boolean;
+    /**
+     * Gets the current network activity for the element.
+     */
+    readonly networkState: number;
+    onencrypted: (this: HTMLMediaElement, ev: MediaEncryptedEvent) => any;
+    onmsneedkey: (this: HTMLMediaElement, ev: MSMediaKeyNeededEvent) => any;
+    /**
+     * Gets a flag that specifies whether playback is paused.
+     */
+    readonly paused: boolean;
+    /**
+     * Gets or sets the current rate of speed for the media resource to play. This speed is expressed as a multiple of the normal speed of the media resource.
+     */
+    playbackRate: number;
+    /**
+     * Gets TimeRanges for the current media resource that has been played.
+     */
+    readonly played: TimeRanges;
+    /**
+     * Gets or sets the current playback position, in seconds.
+     */
+    preload: string;
+    readyState: number;
+    /**
+     * Returns a TimeRanges object that represents the ranges of the current media resource that can be seeked.
+     */
+    readonly seekable: TimeRanges;
+    /**
+     * Gets a flag that indicates whether the the client is currently moving to a new playback position in the media resource.
+     */
+    readonly seeking: boolean;
+    /**
+     * The address or URL of the a media resource that is to be considered.
+     */
+    src: string;
+    srcObject: MediaStream | null;
+    readonly textTracks: TextTrackList;
+    readonly videoTracks: VideoTrackList;
+    /**
+     * Gets or sets the volume level for audio portions of the media element.
+     */
+    volume: number;
+    addTextTrack(kind: string, label?: string, language?: string): TextTrack;
+    /**
+     * Returns a string that specifies whether the client can play a given media resource type.
+     */
+    canPlayType(type: string): string;
+    /**
+     * Resets the audio or video object and loads a new media resource.
+     */
+    load(): void;
+    /**
+     * Clears all effects from the media pipeline.
+     */
+    msClearEffects(): void;
+    msGetAsCastingSource(): any;
+    /**
+     * Inserts the specified audio effect into media pipeline.
+     */
+    msInsertAudioEffect(activatableClassId: string, effectRequired: boolean, config?: any): void;
+    msSetMediaKeys(mediaKeys: MSMediaKeys): void;
+    /**
+     * Specifies the media protection manager for a given media pipeline.
+     */
+    msSetMediaProtectionManager(mediaProtectionManager?: any): void;
+    /**
+     * Pauses the current playback and sets paused to TRUE. This can be used to test whether the media is playing or paused. You can also use the pause or play events to tell whether the media is playing or not.
+     */
+    pause(): void;
+    /**
+     * Loads and starts playback of a media resource.
+     */
+    play(): Promise<void>;
+    setMediaKeys(mediaKeys: MediaKeys | null): Promise<void>;
+    readonly HAVE_CURRENT_DATA: number;
+    readonly HAVE_ENOUGH_DATA: number;
+    readonly HAVE_FUTURE_DATA: number;
+    readonly HAVE_METADATA: number;
+    readonly HAVE_NOTHING: number;
+    readonly NETWORK_EMPTY: number;
+    readonly NETWORK_IDLE: number;
+    readonly NETWORK_LOADING: number;
+    readonly NETWORK_NO_SOURCE: number;
+    addEventListener<K extends keyof HTMLMediaElementEventMap>(type: K, listener: (this: HTMLMediaElement, ev: HTMLMediaElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLMediaElement: {
+    prototype: HTMLMediaElement;
+    new(): HTMLMediaElement;
+    readonly HAVE_CURRENT_DATA: number;
+    readonly HAVE_ENOUGH_DATA: number;
+    readonly HAVE_FUTURE_DATA: number;
+    readonly HAVE_METADATA: number;
+    readonly HAVE_NOTHING: number;
+    readonly NETWORK_EMPTY: number;
+    readonly NETWORK_IDLE: number;
+    readonly NETWORK_LOADING: number;
+    readonly NETWORK_NO_SOURCE: number;
+};
+
+interface HTMLMenuElement extends HTMLElement {
+    compact: boolean;
+    type: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLMenuElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLMenuElement: {
+    prototype: HTMLMenuElement;
+    new(): HTMLMenuElement;
+};
+
+interface HTMLMetaElement extends HTMLElement {
+    /**
+     * Sets or retrieves the character set used to encode the object.
+     */
+    charset: string;
+    /**
+     * Gets or sets meta-information to associate with httpEquiv or name.
+     */
+    content: string;
+    /**
+     * Gets or sets information used to bind the value of a content attribute of a meta element to an HTTP response header.
+     */
+    httpEquiv: string;
+    /**
+     * Sets or retrieves the value specified in the content attribute of the meta object.
+     */
+    name: string;
+    /**
+     * Sets or retrieves a scheme to be used in interpreting the value of a property specified for the object.
+     */
+    scheme: string;
+    /**
+     * Sets or retrieves the URL property that will be loaded after the specified time has elapsed.
+     */
+    url: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLMetaElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLMetaElement: {
+    prototype: HTMLMetaElement;
+    new(): HTMLMetaElement;
+};
+
+interface HTMLMeterElement extends HTMLElement {
+    high: number;
+    low: number;
+    max: number;
+    min: number;
+    optimum: number;
+    value: number;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLMeterElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLMeterElement: {
+    prototype: HTMLMeterElement;
+    new(): HTMLMeterElement;
+};
+
+interface HTMLModElement extends HTMLElement {
+    /**
+     * Sets or retrieves reference information about the object.
+     */
+    cite: string;
+    /**
+     * Sets or retrieves the date and time of a modification to the object.
+     */
+    dateTime: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLModElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLModElement: {
+    prototype: HTMLModElement;
+    new(): HTMLModElement;
+};
+
+interface HTMLObjectElement extends HTMLElement, GetSVGDocument {
+    align: string;
+    /**
+     * Sets or retrieves a text alternative to the graphic.
+     */
+    alt: string;
+    /**
+     * Gets or sets the optional alternative HTML script to execute if the object fails to load.
+     */
+    altHtml: string;
+    /**
+     * Sets or retrieves a character string that can be used to implement your own archive functionality for the object.
+     */
+    archive: string;
+    /**
+     * Retrieves a string of the URL where the object tag can be found. This is often the href of the document that the object is in, or the value set by a base element.
+     */
+    readonly BaseHref: string;
+    border: string;
+    /**
+     * Sets or retrieves the URL of the file containing the compiled Java class.
+     */
+    code: string;
+    /**
+     * Sets or retrieves the URL of the component.
+     */
+    codeBase: string;
+    /**
+     * Sets or retrieves the Internet media type for the code associated with the object.
+     */
+    codeType: string;
+    /**
+     * Retrieves the document object of the page or frame.
+     */
+    readonly contentDocument: Document;
+    /**
+     * Sets or retrieves the URL that references the data of the object.
+     */
+    data: string;
+    declare: boolean;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: string;
+    hspace: number;
+    /**
+     * Gets or sets whether the DLNA PlayTo device is available.
+     */
+    msPlayToDisabled: boolean;
+    /**
+     * Gets or sets the path to the preferred media source. This enables the Play To target device to stream the media content, which can be DRM protected, from a different location, such as a cloud media server.
+     */
+    msPlayToPreferredSourceUri: string;
+    /**
+     * Gets or sets the primary DLNA PlayTo device.
+     */
+    msPlayToPrimary: boolean;
+    /**
+     * Gets the source associated with the media element for use by the PlayToManager.
+     */
+    readonly msPlayToSource: any;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    readonly readyState: number;
+    /**
+     * Sets or retrieves a message to be displayed while an object is loading.
+     */
+    standby: string;
+    /**
+     * Sets or retrieves the MIME type of the object.
+     */
+    type: string;
+    /**
+     * Sets or retrieves the URL, often with a bookmark extension (#name), to use as a client-side image map.
+     */
+    useMap: string;
+    /**
+     * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
+     */
+    readonly validationMessage: string;
+    /**
+     * Returns a  ValidityState object that represents the validity states of an element.
+     */
+    readonly validity: ValidityState;
+    vspace: number;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: string;
+    /**
+     * Returns whether an element will successfully validate based on forms validation rules and constraints.
+     */
+    readonly willValidate: boolean;
+    /**
+     * Returns whether a form will validate when it is submitted, without having to submit it.
+     */
+    checkValidity(): boolean;
+    /**
+     * Sets a custom error message that is displayed when a form is submitted.
+     * @param error Sets a custom error message that is displayed when a form is submitted.
+     */
+    setCustomValidity(error: string): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLObjectElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLObjectElement: {
+    prototype: HTMLObjectElement;
+    new(): HTMLObjectElement;
+};
+
+interface HTMLOListElement extends HTMLElement {
+    compact: boolean;
+    /**
+     * The starting number.
+     */
+    start: number;
+    type: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLOListElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLOListElement: {
+    prototype: HTMLOListElement;
+    new(): HTMLOListElement;
+};
+
+interface HTMLOptGroupElement extends HTMLElement {
+    /**
+     * Sets or retrieves the status of an option.
+     */
+    defaultSelected: boolean;
+    disabled: boolean;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Sets or retrieves the ordinal position of an option in a list box.
+     */
+    readonly index: number;
+    /**
+     * Sets or retrieves a value that you can use to implement your own label functionality for the object.
+     */
+    label: string;
+    /**
+     * Sets or retrieves whether the option in the list box is the default item.
+     */
+    selected: boolean;
+    /**
+     * Sets or retrieves the text string specified by the option tag.
+     */
+    readonly text: string;
+    /**
+     * Sets or retrieves the value which is returned to the server when the form control is submitted.
+     */
+    value: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLOptGroupElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLOptGroupElement: {
+    prototype: HTMLOptGroupElement;
+    new(): HTMLOptGroupElement;
+};
+
+interface HTMLOptionElement extends HTMLElement {
+    /**
+     * Sets or retrieves the status of an option.
+     */
+    defaultSelected: boolean;
+    disabled: boolean;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Sets or retrieves the ordinal position of an option in a list box.
+     */
+    readonly index: number;
+    /**
+     * Sets or retrieves a value that you can use to implement your own label functionality for the object.
+     */
+    label: string;
+    /**
+     * Sets or retrieves whether the option in the list box is the default item.
+     */
+    selected: boolean;
+    /**
+     * Sets or retrieves the text string specified by the option tag.
+     */
+    text: string;
+    /**
+     * Sets or retrieves the value which is returned to the server when the form control is submitted.
+     */
+    value: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLOptionElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLOptionElement: {
+    prototype: HTMLOptionElement;
+    new(): HTMLOptionElement;
+};
+
+interface HTMLOptionsCollection extends HTMLCollectionOf<HTMLOptionElement> {
+    length: number;
+    selectedIndex: number;
+    add(element: HTMLOptionElement | HTMLOptGroupElement, before?: HTMLElement | number): void;
+    remove(index: number): void;
+}
+
+declare var HTMLOptionsCollection: {
+    prototype: HTMLOptionsCollection;
+    new(): HTMLOptionsCollection;
+};
+
+interface HTMLOutputElement extends HTMLElement {
+    defaultValue: string;
+    readonly form: HTMLFormElement;
+    readonly htmlFor: DOMSettableTokenList;
+    name: string;
+    readonly type: string;
+    readonly validationMessage: string;
+    readonly validity: ValidityState;
+    value: string;
+    readonly willValidate: boolean;
+    checkValidity(): boolean;
+    reportValidity(): boolean;
+    setCustomValidity(error: string): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLOutputElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLOutputElement: {
+    prototype: HTMLOutputElement;
+    new(): HTMLOutputElement;
+};
+
+interface HTMLParagraphElement extends HTMLElement {
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    clear: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLParagraphElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLParagraphElement: {
+    prototype: HTMLParagraphElement;
+    new(): HTMLParagraphElement;
+};
+
+interface HTMLParamElement extends HTMLElement {
+    /**
+     * Sets or retrieves the name of an input parameter for an element.
+     */
+    name: string;
+    /**
+     * Sets or retrieves the content type of the resource designated by the value attribute.
+     */
+    type: string;
+    /**
+     * Sets or retrieves the value of an input parameter for an element.
+     */
+    value: string;
+    /**
+     * Sets or retrieves the data type of the value attribute.
+     */
+    valueType: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLParamElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLParamElement: {
+    prototype: HTMLParamElement;
+    new(): HTMLParamElement;
+};
+
+interface HTMLPictureElement extends HTMLElement {
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLPictureElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLPictureElement: {
+    prototype: HTMLPictureElement;
+    new(): HTMLPictureElement;
+};
+
+interface HTMLPreElement extends HTMLElement {
+    /**
+     * Sets or gets a value that you can use to implement your own width functionality for the object.
+     */
+    width: number;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLPreElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLPreElement: {
+    prototype: HTMLPreElement;
+    new(): HTMLPreElement;
+};
+
+interface HTMLProgressElement extends HTMLElement {
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Defines the maximum, or "done" value for a progress element.
+     */
+    max: number;
+    /**
+     * Returns the quotient of value/max when the value attribute is set (determinate progress bar), or -1 when the value attribute is missing (indeterminate progress bar).
+     */
+    readonly position: number;
+    /**
+     * Sets or gets the current value of a progress element. The value must be a non-negative number between 0 and the max value.
+     */
+    value: number;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLProgressElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLProgressElement: {
+    prototype: HTMLProgressElement;
+    new(): HTMLProgressElement;
+};
+
+interface HTMLQuoteElement extends HTMLElement {
+    /**
+     * Sets or retrieves reference information about the object.
+     */
+    cite: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLQuoteElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLQuoteElement: {
+    prototype: HTMLQuoteElement;
+    new(): HTMLQuoteElement;
+};
+
+interface HTMLScriptElement extends HTMLElement {
+    async: boolean;
+    /**
+     * Sets or retrieves the character set used to encode the object.
+     */
+    charset: string;
+    crossOrigin: string | null;
+    /**
+     * Sets or retrieves the status of the script.
+     */
+    defer: boolean;
+    /**
+     * Sets or retrieves the event for which the script is written.
+     */
+    event: string;
+    /**
+     * Sets or retrieves the object that is bound to the event script.
+     */
+    htmlFor: string;
+    /**
+     * Retrieves the URL to an external file that contains the source code or data.
+     */
+    src: string;
+    /**
+     * Retrieves or sets the text of the object as a string.
+     */
+    text: string;
+    /**
+     * Sets or retrieves the MIME type for the associated scripting engine.
+     */
+    type: string;
+    integrity: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLScriptElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLScriptElement: {
+    prototype: HTMLScriptElement;
+    new(): HTMLScriptElement;
+};
+
+interface HTMLSelectElement extends HTMLElement {
+    /**
+     * Provides a way to direct a user to a specific field when a document loads. This can provide both direction and convenience for a user, reducing the need to click or tab to a field when a page opens. This attribute is true when present on an element, and false when missing.
+     */
+    autofocus: boolean;
+    disabled: boolean;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Sets or retrieves the number of objects in a collection.
+     */
+    length: number;
+    /**
+     * Sets or retrieves the Boolean value indicating whether multiple items can be selected from a list.
+     */
+    multiple: boolean;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    readonly options: HTMLOptionsCollection;
+    /**
+     * When present, marks an element that can't be submitted without a value.
+     */
+    required: boolean;
+    /**
+     * Sets or retrieves the index of the selected option in a select object.
+     */
+    selectedIndex: number;
+    selectedOptions: HTMLCollectionOf<HTMLOptionElement>;
+    /**
+     * Sets or retrieves the number of rows in the list box.
+     */
+    size: number;
+    /**
+     * Retrieves the type of select control based on the value of the MULTIPLE attribute.
+     */
+    readonly type: string;
+    /**
+     * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
+     */
+    readonly validationMessage: string;
+    /**
+     * Returns a  ValidityState object that represents the validity states of an element.
+     */
+    readonly validity: ValidityState;
+    /**
+     * Sets or retrieves the value which is returned to the server when the form control is submitted.
+     */
+    value: string;
+    /**
+     * Returns whether an element will successfully validate based on forms validation rules and constraints.
+     */
+    readonly willValidate: boolean;
+    /**
+     * Adds an element to the areas, controlRange, or options collection.
+     * @param element Variant of type Number that specifies the index position in the collection where the element is placed. If no value is given, the method places the element at the end of the collection.
+     * @param before Variant of type Object that specifies an element to insert before, or null to append the object to the collection.
+     */
+    add(element: HTMLElement, before?: HTMLElement | number): void;
+    /**
+     * Returns whether a form will validate when it is submitted, without having to submit it.
+     */
+    checkValidity(): boolean;
+    /**
+     * Retrieves a select object or an object from an options collection.
+     * @param name Variant of type Number or String that specifies the object or collection to retrieve. If this parameter is an integer, it is the zero-based index of the object. If this parameter is a string, all objects with matching name or id properties are retrieved, and a collection is returned if more than one match is made.
+     * @param index Variant of type Number that specifies the zero-based index of the object to retrieve when a collection is returned.
+     */
+    item(name?: any, index?: any): any;
+    /**
+     * Retrieves a select object or an object from an options collection.
+     * @param namedItem A String that specifies the name or id property of the object to retrieve. A collection is returned if more than one match is made.
+     */
+    namedItem(name: string): any;
+    /**
+     * Removes an element from the collection.
+     * @param index Number that specifies the zero-based index of the element to remove from the collection.
+     */
+    remove(index?: number): void;
+    /**
+     * Sets a custom error message that is displayed when a form is submitted.
+     * @param error Sets a custom error message that is displayed when a form is submitted.
+     */
+    setCustomValidity(error: string): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLSelectElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+    [name: string]: any;
+}
+
+declare var HTMLSelectElement: {
+    prototype: HTMLSelectElement;
+    new(): HTMLSelectElement;
+};
+
+interface HTMLSourceElement extends HTMLElement {
+    /**
+     * Gets or sets the intended media type of the media source.
+     */
+    media: string;
+    msKeySystem: string;
+    sizes: string;
+    /**
+     * The address or URL of the a media resource that is to be considered.
+     */
+    src: string;
+    srcset: string;
+    /**
+     * Gets or sets the MIME type of a media resource.
+     */
+    type: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLSourceElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLSourceElement: {
+    prototype: HTMLSourceElement;
+    new(): HTMLSourceElement;
+};
+
+interface HTMLSpanElement extends HTMLElement {
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLSpanElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLSpanElement: {
+    prototype: HTMLSpanElement;
+    new(): HTMLSpanElement;
+};
+
+interface HTMLStyleElement extends HTMLElement, LinkStyle {
+    disabled: boolean;
+    /**
+     * Sets or retrieves the media type.
+     */
+    media: string;
+    /**
+     * Retrieves the CSS language in which the style sheet is written.
+     */
+    type: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLStyleElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLStyleElement: {
+    prototype: HTMLStyleElement;
+    new(): HTMLStyleElement;
+};
+
+interface HTMLTableCaptionElement extends HTMLElement {
+    /**
+     * Sets or retrieves the alignment of the caption or legend.
+     */
+    align: string;
+    /**
+     * Sets or retrieves whether the caption appears at the top or bottom of the table.
+     */
+    vAlign: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTableCaptionElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTableCaptionElement: {
+    prototype: HTMLTableCaptionElement;
+    new(): HTMLTableCaptionElement;
+};
+
+interface HTMLTableCellElement extends HTMLElement, HTMLTableAlignment {
+    /**
+     * Sets or retrieves abbreviated text for the object.
+     */
+    abbr: string;
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    /**
+     * Sets or retrieves a comma-delimited list of conceptual categories associated with the object.
+     */
+    axis: string;
+    bgColor: any;
+    /**
+     * Retrieves the position of the object in the cells collection of a row.
+     */
+    readonly cellIndex: number;
+    /**
+     * Sets or retrieves the number columns in the table that the object should span.
+     */
+    colSpan: number;
+    /**
+     * Sets or retrieves a list of header cells that provide information for the object.
+     */
+    headers: string;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: any;
+    /**
+     * Sets or retrieves whether the browser automatically performs wordwrap.
+     */
+    noWrap: boolean;
+    /**
+     * Sets or retrieves how many rows in a table the cell should span.
+     */
+    rowSpan: number;
+    /**
+     * Sets or retrieves the group of cells in a table to which the object's information applies.
+     */
+    scope: string;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTableCellElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTableCellElement: {
+    prototype: HTMLTableCellElement;
+    new(): HTMLTableCellElement;
+};
+
+interface HTMLTableColElement extends HTMLElement, HTMLTableAlignment {
+    /**
+     * Sets or retrieves the alignment of the object relative to the display or table.
+     */
+    align: string;
+    /**
+     * Sets or retrieves the number of columns in the group.
+     */
+    span: number;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: any;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTableColElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTableColElement: {
+    prototype: HTMLTableColElement;
+    new(): HTMLTableColElement;
+};
+
+interface HTMLTableDataCellElement extends HTMLTableCellElement {
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTableDataCellElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTableDataCellElement: {
+    prototype: HTMLTableDataCellElement;
+    new(): HTMLTableDataCellElement;
+};
+
+interface HTMLTableElement extends HTMLElement {
+    /**
+     * Sets or retrieves a value that indicates the table alignment.
+     */
+    align: string;
+    bgColor: any;
+    /**
+     * Sets or retrieves the width of the border to draw around the object.
+     */
+    border: string;
+    /**
+     * Sets or retrieves the border color of the object.
+     */
+    borderColor: any;
+    /**
+     * Retrieves the caption object of a table.
+     */
+    caption: HTMLTableCaptionElement;
+    /**
+     * Sets or retrieves the amount of space between the border of the cell and the content of the cell.
+     */
+    cellPadding: string;
+    /**
+     * Sets or retrieves the amount of space between cells in a table.
+     */
+    cellSpacing: string;
+    /**
+     * Sets or retrieves the number of columns in the table.
+     */
+    cols: number;
+    /**
+     * Sets or retrieves the way the border frame around the table is displayed.
+     */
+    frame: string;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: any;
+    /**
+     * Sets or retrieves the number of horizontal rows contained in the object.
+     */
+    rows: HTMLCollectionOf<HTMLTableRowElement>;
+    /**
+     * Sets or retrieves which dividing lines (inner borders) are displayed.
+     */
+    rules: string;
+    /**
+     * Sets or retrieves a description and/or structure of the object.
+     */
+    summary: string;
+    /**
+     * Retrieves a collection of all tBody objects in the table. Objects in this collection are in source order.
+     */
+    tBodies: HTMLCollectionOf<HTMLTableSectionElement>;
+    /**
+     * Retrieves the tFoot object of the table.
+     */
+    tFoot: HTMLTableSectionElement;
+    /**
+     * Retrieves the tHead object of the table.
+     */
+    tHead: HTMLTableSectionElement;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: string;
+    /**
+     * Creates an empty caption element in the table.
+     */
+    createCaption(): HTMLTableCaptionElement;
+    /**
+     * Creates an empty tBody element in the table.
+     */
+    createTBody(): HTMLTableSectionElement;
+    /**
+     * Creates an empty tFoot element in the table.
+     */
+    createTFoot(): HTMLTableSectionElement;
+    /**
+     * Returns the tHead element object if successful, or null otherwise.
+     */
+    createTHead(): HTMLTableSectionElement;
+    /**
+     * Deletes the caption element and its contents from the table.
+     */
+    deleteCaption(): void;
+    /**
+     * Removes the specified row (tr) from the element and from the rows collection.
+     * @param index Number that specifies the zero-based position in the rows collection of the row to remove.
+     */
+    deleteRow(index?: number): void;
+    /**
+     * Deletes the tFoot element and its contents from the table.
+     */
+    deleteTFoot(): void;
+    /**
+     * Deletes the tHead element and its contents from the table.
+     */
+    deleteTHead(): void;
+    /**
+     * Creates a new row (tr) in the table, and adds the row to the rows collection.
+     * @param index Number that specifies where to insert the row in the rows collection. The default value is -1, which appends the new row to the end of the rows collection.
+     */
+    insertRow(index?: number): HTMLTableRowElement;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTableElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTableElement: {
+    prototype: HTMLTableElement;
+    new(): HTMLTableElement;
+};
+
+interface HTMLTableHeaderCellElement extends HTMLTableCellElement {
+    /**
+     * Sets or retrieves the group of cells in a table to which the object's information applies.
+     */
+    scope: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTableHeaderCellElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTableHeaderCellElement: {
+    prototype: HTMLTableHeaderCellElement;
+    new(): HTMLTableHeaderCellElement;
+};
+
+interface HTMLTableRowElement extends HTMLElement, HTMLTableAlignment {
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    bgColor: any;
+    /**
+     * Retrieves a collection of all cells in the table row.
+     */
+    cells: HTMLCollectionOf<HTMLTableDataCellElement | HTMLTableHeaderCellElement>;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: any;
+    /**
+     * Retrieves the position of the object in the rows collection for the table.
+     */
+    readonly rowIndex: number;
+    /**
+     * Retrieves the position of the object in the collection.
+     */
+    readonly sectionRowIndex: number;
+    /**
+     * Removes the specified cell from the table row, as well as from the cells collection.
+     * @param index Number that specifies the zero-based position of the cell to remove from the table row. If no value is provided, the last cell in the cells collection is deleted.
+     */
+    deleteCell(index?: number): void;
+    /**
+     * Creates a new cell in the table row, and adds the cell to the cells collection.
+     * @param index Number that specifies where to insert the cell in the tr. The default value is -1, which appends the new cell to the end of the cells collection.
+     */
+    insertCell(index?: number): HTMLTableDataCellElement;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTableRowElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTableRowElement: {
+    prototype: HTMLTableRowElement;
+    new(): HTMLTableRowElement;
+};
+
+interface HTMLTableSectionElement extends HTMLElement, HTMLTableAlignment {
+    /**
+     * Sets or retrieves a value that indicates the table alignment.
+     */
+    align: string;
+    /**
+     * Sets or retrieves the number of horizontal rows contained in the object.
+     */
+    rows: HTMLCollectionOf<HTMLTableRowElement>;
+    /**
+     * Removes the specified row (tr) from the element and from the rows collection.
+     * @param index Number that specifies the zero-based position in the rows collection of the row to remove.
+     */
+    deleteRow(index?: number): void;
+    /**
+     * Creates a new row (tr) in the table, and adds the row to the rows collection.
+     * @param index Number that specifies where to insert the row in the rows collection. The default value is -1, which appends the new row to the end of the rows collection.
+     */
+    insertRow(index?: number): HTMLTableRowElement;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTableSectionElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTableSectionElement: {
+    prototype: HTMLTableSectionElement;
+    new(): HTMLTableSectionElement;
+};
+
+interface HTMLTemplateElement extends HTMLElement {
+    readonly content: DocumentFragment;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTemplateElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTemplateElement: {
+    prototype: HTMLTemplateElement;
+    new(): HTMLTemplateElement;
+};
+
+interface HTMLTextAreaElement extends HTMLElement {
+    /**
+     * Provides a way to direct a user to a specific field when a document loads. This can provide both direction and convenience for a user, reducing the need to click or tab to a field when a page opens. This attribute is true when present on an element, and false when missing.
+     */
+    autofocus: boolean;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    cols: number;
+    /**
+     * Sets or retrieves the initial contents of the object.
+     */
+    defaultValue: string;
+    disabled: boolean;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Sets or retrieves the maximum number of characters that the user can enter in a text control.
+     */
+    maxLength: number;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    /**
+     * Gets or sets a text string that is displayed in an input field as a hint or prompt to users as the format or type of information they need to enter.The text appears in an input field until the user puts focus on the field.
+     */
+    placeholder: string;
+    /**
+     * Sets or retrieves the value indicated whether the content of the object is read-only.
+     */
+    readOnly: boolean;
+    /**
+     * When present, marks an element that can't be submitted without a value.
+     */
+    required: boolean;
+    /**
+     * Sets or retrieves the number of horizontal rows contained in the object.
+     */
+    rows: number;
+    /**
+     * Gets or sets the end position or offset of a text selection.
+     */
+    selectionEnd: number;
+    /**
+     * Gets or sets the starting position or offset of a text selection.
+     */
+    selectionStart: number;
+    /**
+     * Sets or retrieves the value indicating whether the control is selected.
+     */
+    status: any;
+    /**
+     * Retrieves the type of control.
+     */
+    readonly type: string;
+    /**
+     * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
+     */
+    readonly validationMessage: string;
+    /**
+     * Returns a  ValidityState object that represents the validity states of an element.
+     */
+    readonly validity: ValidityState;
+    /**
+     * Retrieves or sets the text in the entry field of the textArea element.
+     */
+    value: string;
+    /**
+     * Returns whether an element will successfully validate based on forms validation rules and constraints.
+     */
+    readonly willValidate: boolean;
+    /**
+     * Sets or retrieves how to handle wordwrapping in the object.
+     */
+    wrap: string;
+    minLength: number;
+    /**
+     * Returns whether a form will validate when it is submitted, without having to submit it.
+     */
+    checkValidity(): boolean;
+    /**
+     * Highlights the input area of a form element.
+     */
+    select(): void;
+    /**
+     * Sets a custom error message that is displayed when a form is submitted.
+     * @param error Sets a custom error message that is displayed when a form is submitted.
+     */
+    setCustomValidity(error: string): void;
+    /**
+     * Sets the start and end positions of a selection in a text field.
+     * @param start The offset into the text field for the start of the selection.
+     * @param end The offset into the text field for the end of the selection.
+     */
+    setSelectionRange(start: number, end: number): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTextAreaElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTextAreaElement: {
+    prototype: HTMLTextAreaElement;
+    new(): HTMLTextAreaElement;
+};
+
+interface HTMLTimeElement extends HTMLElement {
+    dateTime: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTimeElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTimeElement: {
+    prototype: HTMLTimeElement;
+    new(): HTMLTimeElement;
+};
+
+interface HTMLTitleElement extends HTMLElement {
+    /**
+     * Retrieves or sets the text of the object as a string.
+     */
+    text: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTitleElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTitleElement: {
+    prototype: HTMLTitleElement;
+    new(): HTMLTitleElement;
+};
+
+interface HTMLTrackElement extends HTMLElement {
+    default: boolean;
+    kind: string;
+    label: string;
+    readonly readyState: number;
+    src: string;
+    srclang: string;
+    readonly track: TextTrack;
+    readonly ERROR: number;
+    readonly LOADED: number;
+    readonly LOADING: number;
+    readonly NONE: number;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTrackElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTrackElement: {
+    prototype: HTMLTrackElement;
+    new(): HTMLTrackElement;
+    readonly ERROR: number;
+    readonly LOADED: number;
+    readonly LOADING: number;
+    readonly NONE: number;
+};
+
+interface HTMLUListElement extends HTMLElement {
+    compact: boolean;
+    type: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLUListElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLUListElement: {
+    prototype: HTMLUListElement;
+    new(): HTMLUListElement;
+};
+
+interface HTMLUnknownElement extends HTMLElement {
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLUnknownElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLUnknownElement: {
+    prototype: HTMLUnknownElement;
+    new(): HTMLUnknownElement;
+};
+
+interface HTMLVideoElementEventMap extends HTMLMediaElementEventMap {
+    "MSVideoFormatChanged": Event;
+    "MSVideoFrameStepCompleted": Event;
+    "MSVideoOptimalLayoutChanged": Event;
+}
+
+interface HTMLVideoElement extends HTMLMediaElement {
+    /**
+     * Gets or sets the height of the video element.
+     */
+    height: number;
+    msHorizontalMirror: boolean;
+    readonly msIsLayoutOptimalForPlayback: boolean;
+    readonly msIsStereo3D: boolean;
+    msStereo3DPackingMode: string;
+    msStereo3DRenderMode: string;
+    msZoom: boolean;
+    onMSVideoFormatChanged: (this: HTMLVideoElement, ev: Event) => any;
+    onMSVideoFrameStepCompleted: (this: HTMLVideoElement, ev: Event) => any;
+    onMSVideoOptimalLayoutChanged: (this: HTMLVideoElement, ev: Event) => any;
+    /**
+     * Gets or sets a URL of an image to display, for example, like a movie poster. This can be a still frame from the video, or another image if no video data is available.
+     */
+    poster: string;
+    /**
+     * Gets the intrinsic height of a video in CSS pixels, or zero if the dimensions are not known.
+     */
+    readonly videoHeight: number;
+    /**
+     * Gets the intrinsic width of a video in CSS pixels, or zero if the dimensions are not known.
+     */
+    readonly videoWidth: number;
+    readonly webkitDisplayingFullscreen: boolean;
+    readonly webkitSupportsFullscreen: boolean;
+    /**
+     * Gets or sets the width of the video element.
+     */
+    width: number;
+    getVideoPlaybackQuality(): VideoPlaybackQuality;
+    msFrameStep(forward: boolean): void;
+    msInsertVideoEffect(activatableClassId: string, effectRequired: boolean, config?: any): void;
+    msSetVideoRectangle(left: number, top: number, right: number, bottom: number): void;
+    webkitEnterFullscreen(): void;
+    webkitEnterFullScreen(): void;
+    webkitExitFullscreen(): void;
+    webkitExitFullScreen(): void;
+    addEventListener<K extends keyof HTMLVideoElementEventMap>(type: K, listener: (this: HTMLVideoElement, ev: HTMLVideoElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLVideoElement: {
+    prototype: HTMLVideoElement;
+    new(): HTMLVideoElement;
+};
+
+interface IDBCursor {
+    readonly direction: IDBCursorDirection;
+    key: IDBKeyRange | IDBValidKey;
+    readonly primaryKey: any;
+    source: IDBObjectStore | IDBIndex;
+    advance(count: number): void;
+    continue(key?: IDBKeyRange | IDBValidKey): void;
+    delete(): IDBRequest;
+    update(value: any): IDBRequest;
+    readonly NEXT: string;
+    readonly NEXT_NO_DUPLICATE: string;
+    readonly PREV: string;
+    readonly PREV_NO_DUPLICATE: string;
+}
+
+declare var IDBCursor: {
+    prototype: IDBCursor;
+    new(): IDBCursor;
+    readonly NEXT: string;
+    readonly NEXT_NO_DUPLICATE: string;
+    readonly PREV: string;
+    readonly PREV_NO_DUPLICATE: string;
+};
+
+interface IDBCursorWithValue extends IDBCursor {
+    readonly value: any;
+}
+
+declare var IDBCursorWithValue: {
+    prototype: IDBCursorWithValue;
+    new(): IDBCursorWithValue;
+};
+
+interface IDBDatabaseEventMap {
+    "abort": Event;
+    "error": Event;
+}
+
+interface IDBDatabase extends EventTarget {
+    readonly name: string;
+    readonly objectStoreNames: DOMStringList;
+    onabort: (this: IDBDatabase, ev: Event) => any;
+    onerror: (this: IDBDatabase, ev: Event) => any;
+    version: number;
+    onversionchange: (ev: IDBVersionChangeEvent) => any;
+    close(): void;
+    createObjectStore(name: string, optionalParameters?: IDBObjectStoreParameters): IDBObjectStore;
+    deleteObjectStore(name: string): void;
+    transaction(storeNames: string | string[], mode?: IDBTransactionMode): IDBTransaction;
+    addEventListener(type: "versionchange", listener: (ev: IDBVersionChangeEvent) => any, useCapture?: boolean): void;
+    addEventListener<K extends keyof IDBDatabaseEventMap>(type: K, listener: (this: IDBDatabase, ev: IDBDatabaseEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var IDBDatabase: {
+    prototype: IDBDatabase;
+    new(): IDBDatabase;
+};
+
+interface IDBFactory {
+    cmp(first: any, second: any): number;
+    deleteDatabase(name: string): IDBOpenDBRequest;
+    open(name: string, version?: number): IDBOpenDBRequest;
+}
+
+declare var IDBFactory: {
+    prototype: IDBFactory;
+    new(): IDBFactory;
+};
+
+interface IDBIndex {
+    keyPath: string | string[];
+    readonly name: string;
+    readonly objectStore: IDBObjectStore;
+    readonly unique: boolean;
+    multiEntry: boolean;
+    count(key?: IDBKeyRange | IDBValidKey): IDBRequest;
+    get(key: IDBKeyRange | IDBValidKey): IDBRequest;
+    getKey(key: IDBKeyRange | IDBValidKey): IDBRequest;
+    openCursor(range?: IDBKeyRange | IDBValidKey, direction?: IDBCursorDirection): IDBRequest;
+    openKeyCursor(range?: IDBKeyRange | IDBValidKey, direction?: IDBCursorDirection): IDBRequest;
+}
+
+declare var IDBIndex: {
+    prototype: IDBIndex;
+    new(): IDBIndex;
+};
+
+interface IDBKeyRange {
+    readonly lower: any;
+    readonly lowerOpen: boolean;
+    readonly upper: any;
+    readonly upperOpen: boolean;
+}
+
+declare var IDBKeyRange: {
+    prototype: IDBKeyRange;
+    new(): IDBKeyRange;
+    bound(lower: any, upper: any, lowerOpen?: boolean, upperOpen?: boolean): IDBKeyRange;
+    lowerBound(lower: any, open?: boolean): IDBKeyRange;
+    only(value: any): IDBKeyRange;
+    upperBound(upper: any, open?: boolean): IDBKeyRange;
+};
+
+interface IDBObjectStore {
+    readonly indexNames: DOMStringList;
+    keyPath: string | string[];
+    readonly name: string;
+    readonly transaction: IDBTransaction;
+    autoIncrement: boolean;
+    add(value: any, key?: IDBKeyRange | IDBValidKey): IDBRequest;
+    clear(): IDBRequest;
+    count(key?: IDBKeyRange | IDBValidKey): IDBRequest;
+    createIndex(name: string, keyPath: string | string[], optionalParameters?: IDBIndexParameters): IDBIndex;
+    delete(key: IDBKeyRange | IDBValidKey): IDBRequest;
+    deleteIndex(indexName: string): void;
+    get(key: any): IDBRequest;
+    index(name: string): IDBIndex;
+    openCursor(range?: IDBKeyRange | IDBValidKey, direction?: IDBCursorDirection): IDBRequest;
+    put(value: any, key?: IDBKeyRange | IDBValidKey): IDBRequest;
+}
+
+declare var IDBObjectStore: {
+    prototype: IDBObjectStore;
+    new(): IDBObjectStore;
+};
+
+interface IDBOpenDBRequestEventMap extends IDBRequestEventMap {
+    "blocked": Event;
+    "upgradeneeded": IDBVersionChangeEvent;
+}
+
+interface IDBOpenDBRequest extends IDBRequest {
+    onblocked: (this: IDBOpenDBRequest, ev: Event) => any;
+    onupgradeneeded: (this: IDBOpenDBRequest, ev: IDBVersionChangeEvent) => any;
+    addEventListener<K extends keyof IDBOpenDBRequestEventMap>(type: K, listener: (this: IDBOpenDBRequest, ev: IDBOpenDBRequestEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var IDBOpenDBRequest: {
+    prototype: IDBOpenDBRequest;
+    new(): IDBOpenDBRequest;
+};
+
+interface IDBRequestEventMap {
+    "error": Event;
+    "success": Event;
+}
+
+interface IDBRequest extends EventTarget {
+    readonly error: DOMException;
+    onerror: (this: IDBRequest, ev: Event) => any;
+    onsuccess: (this: IDBRequest, ev: Event) => any;
+    readonly readyState: IDBRequestReadyState;
+    readonly result: any;
+    source: IDBObjectStore | IDBIndex | IDBCursor;
+    readonly transaction: IDBTransaction;
+    addEventListener<K extends keyof IDBRequestEventMap>(type: K, listener: (this: IDBRequest, ev: IDBRequestEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var IDBRequest: {
+    prototype: IDBRequest;
+    new(): IDBRequest;
+};
+
+interface IDBTransactionEventMap {
+    "abort": Event;
+    "complete": Event;
+    "error": Event;
+}
+
+interface IDBTransaction extends EventTarget {
+    readonly db: IDBDatabase;
+    readonly error: DOMException;
+    readonly mode: IDBTransactionMode;
+    onabort: (this: IDBTransaction, ev: Event) => any;
+    oncomplete: (this: IDBTransaction, ev: Event) => any;
+    onerror: (this: IDBTransaction, ev: Event) => any;
+    abort(): void;
+    objectStore(name: string): IDBObjectStore;
+    readonly READ_ONLY: string;
+    readonly READ_WRITE: string;
+    readonly VERSION_CHANGE: string;
+    addEventListener<K extends keyof IDBTransactionEventMap>(type: K, listener: (this: IDBTransaction, ev: IDBTransactionEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var IDBTransaction: {
+    prototype: IDBTransaction;
+    new(): IDBTransaction;
+    readonly READ_ONLY: string;
+    readonly READ_WRITE: string;
+    readonly VERSION_CHANGE: string;
+};
+
+interface IDBVersionChangeEvent extends Event {
+    readonly newVersion: number | null;
+    readonly oldVersion: number;
+}
+
+declare var IDBVersionChangeEvent: {
+    prototype: IDBVersionChangeEvent;
+    new(): IDBVersionChangeEvent;
+};
+
+interface IIRFilterNode extends AudioNode {
+    getFrequencyResponse(frequencyHz: Float32Array, magResponse: Float32Array, phaseResponse: Float32Array): void;
+}
+
+declare var IIRFilterNode: {
+    prototype: IIRFilterNode;
+    new(): IIRFilterNode;
+};
+
+interface ImageData {
+    data: Uint8ClampedArray;
+    readonly height: number;
+    readonly width: number;
+}
+
+declare var ImageData: {
+    prototype: ImageData;
+    new(width: number, height: number): ImageData;
+    new(array: Uint8ClampedArray, width: number, height: number): ImageData;
+};
+
+interface IntersectionObserver {
+    readonly root: Element | null;
+    readonly rootMargin: string;
+    readonly thresholds: number[];
+    disconnect(): void;
+    observe(target: Element): void;
+    takeRecords(): IntersectionObserverEntry[];
+    unobserve(target: Element): void;
+}
+
+declare var IntersectionObserver: {
+    prototype: IntersectionObserver;
+    new(callback: IntersectionObserverCallback, options?: IntersectionObserverInit): IntersectionObserver;
+};
+
+interface IntersectionObserverEntry {
+    readonly boundingClientRect: ClientRect;
+    readonly intersectionRatio: number;
+    readonly intersectionRect: ClientRect;
+    readonly rootBounds: ClientRect;
+    readonly target: Element;
+    readonly time: number;
+}
+
+declare var IntersectionObserverEntry: {
+    prototype: IntersectionObserverEntry;
+    new(intersectionObserverEntryInit: IntersectionObserverEntryInit): IntersectionObserverEntry;
+};
+
+interface KeyboardEvent extends UIEvent {
+    readonly altKey: boolean;
+    readonly char: string | null;
+    readonly charCode: number;
+    readonly ctrlKey: boolean;
+    readonly key: string;
+    readonly keyCode: number;
+    readonly locale: string;
+    readonly location: number;
+    readonly metaKey: boolean;
+    readonly repeat: boolean;
+    readonly shiftKey: boolean;
+    readonly which: number;
+    readonly code: string;
+    getModifierState(keyArg: string): boolean;
+    initKeyboardEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, keyArg: string, locationArg: number, modifiersListArg: string, repeat: boolean, locale: string): void;
+    readonly DOM_KEY_LOCATION_JOYSTICK: number;
+    readonly DOM_KEY_LOCATION_LEFT: number;
+    readonly DOM_KEY_LOCATION_MOBILE: number;
+    readonly DOM_KEY_LOCATION_NUMPAD: number;
+    readonly DOM_KEY_LOCATION_RIGHT: number;
+    readonly DOM_KEY_LOCATION_STANDARD: number;
+}
+
+declare var KeyboardEvent: {
+    prototype: KeyboardEvent;
+    new(typeArg: string, eventInitDict?: KeyboardEventInit): KeyboardEvent;
+    readonly DOM_KEY_LOCATION_JOYSTICK: number;
+    readonly DOM_KEY_LOCATION_LEFT: number;
+    readonly DOM_KEY_LOCATION_MOBILE: number;
+    readonly DOM_KEY_LOCATION_NUMPAD: number;
+    readonly DOM_KEY_LOCATION_RIGHT: number;
+    readonly DOM_KEY_LOCATION_STANDARD: number;
+};
+
+interface ListeningStateChangedEvent extends Event {
+    readonly label: string;
+    readonly state: ListeningState;
+}
+
+declare var ListeningStateChangedEvent: {
+    prototype: ListeningStateChangedEvent;
+    new(): ListeningStateChangedEvent;
+};
+
+interface Location {
+    hash: string;
+    host: string;
+    hostname: string;
+    href: string;
+    readonly origin: string;
+    pathname: string;
+    port: string;
+    protocol: string;
+    search: string;
+    assign(url: string): void;
+    reload(forcedReload?: boolean): void;
+    replace(url: string): void;
+    toString(): string;
+}
+
+declare var Location: {
+    prototype: Location;
+    new(): Location;
+};
+
+interface LongRunningScriptDetectedEvent extends Event {
+    readonly executionTime: number;
+    stopPageScriptExecution: boolean;
+}
+
+declare var LongRunningScriptDetectedEvent: {
+    prototype: LongRunningScriptDetectedEvent;
+    new(): LongRunningScriptDetectedEvent;
+};
+
+interface MediaDeviceInfo {
+    readonly deviceId: string;
+    readonly groupId: string;
+    readonly kind: MediaDeviceKind;
+    readonly label: string;
+}
+
+declare var MediaDeviceInfo: {
+    prototype: MediaDeviceInfo;
+    new(): MediaDeviceInfo;
+};
+
+interface MediaDevicesEventMap {
+    "devicechange": Event;
+}
+
+interface MediaDevices extends EventTarget {
+    ondevicechange: (this: MediaDevices, ev: Event) => any;
+    enumerateDevices(): any;
+    getSupportedConstraints(): MediaTrackSupportedConstraints;
+    getUserMedia(constraints: MediaStreamConstraints): Promise<MediaStream>;
+    addEventListener<K extends keyof MediaDevicesEventMap>(type: K, listener: (this: MediaDevices, ev: MediaDevicesEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MediaDevices: {
+    prototype: MediaDevices;
+    new(): MediaDevices;
+};
+
+interface MediaElementAudioSourceNode extends AudioNode {
+}
+
+declare var MediaElementAudioSourceNode: {
+    prototype: MediaElementAudioSourceNode;
+    new(): MediaElementAudioSourceNode;
+};
+
+interface MediaEncryptedEvent extends Event {
+    readonly initData: ArrayBuffer | null;
+    readonly initDataType: string;
+}
+
+declare var MediaEncryptedEvent: {
+    prototype: MediaEncryptedEvent;
+    new(type: string, eventInitDict?: MediaEncryptedEventInit): MediaEncryptedEvent;
+};
+
+interface MediaError {
+    readonly code: number;
+    readonly msExtendedCode: number;
+    readonly MEDIA_ERR_ABORTED: number;
+    readonly MEDIA_ERR_DECODE: number;
+    readonly MEDIA_ERR_NETWORK: number;
+    readonly MEDIA_ERR_SRC_NOT_SUPPORTED: number;
+    readonly MS_MEDIA_ERR_ENCRYPTED: number;
+}
+
+declare var MediaError: {
+    prototype: MediaError;
+    new(): MediaError;
+    readonly MEDIA_ERR_ABORTED: number;
+    readonly MEDIA_ERR_DECODE: number;
+    readonly MEDIA_ERR_NETWORK: number;
+    readonly MEDIA_ERR_SRC_NOT_SUPPORTED: number;
+    readonly MS_MEDIA_ERR_ENCRYPTED: number;
+};
+
+interface MediaKeyMessageEvent extends Event {
+    readonly message: ArrayBuffer;
+    readonly messageType: MediaKeyMessageType;
+}
+
+declare var MediaKeyMessageEvent: {
+    prototype: MediaKeyMessageEvent;
+    new(type: string, eventInitDict?: MediaKeyMessageEventInit): MediaKeyMessageEvent;
+};
+
+interface MediaKeys {
+    createSession(sessionType?: MediaKeySessionType): MediaKeySession;
+    setServerCertificate(serverCertificate: any): Promise<void>;
+}
+
+declare var MediaKeys: {
+    prototype: MediaKeys;
+    new(): MediaKeys;
+};
+
+interface MediaKeySession extends EventTarget {
+    readonly closed: Promise<void>;
+    readonly expiration: number;
+    readonly keyStatuses: MediaKeyStatusMap;
+    readonly sessionId: string;
+    close(): Promise<void>;
+    generateRequest(initDataType: string, initData: any): Promise<void>;
+    load(sessionId: string): Promise<boolean>;
+    remove(): Promise<void>;
+    update(response: any): Promise<void>;
+}
+
+declare var MediaKeySession: {
+    prototype: MediaKeySession;
+    new(): MediaKeySession;
+};
+
+interface MediaKeyStatusMap {
+    readonly size: number;
+    forEach(callback: ForEachCallback): void;
+    get(keyId: any): MediaKeyStatus;
+    has(keyId: any): boolean;
+}
+
+declare var MediaKeyStatusMap: {
+    prototype: MediaKeyStatusMap;
+    new(): MediaKeyStatusMap;
+};
+
+interface MediaKeySystemAccess {
+    readonly keySystem: string;
+    createMediaKeys(): Promise<MediaKeys>;
+    getConfiguration(): MediaKeySystemConfiguration;
+}
+
+declare var MediaKeySystemAccess: {
+    prototype: MediaKeySystemAccess;
+    new(): MediaKeySystemAccess;
+};
+
+interface MediaList {
+    readonly length: number;
+    mediaText: string;
+    appendMedium(newMedium: string): void;
+    deleteMedium(oldMedium: string): void;
+    item(index: number): string;
+    toString(): string;
+    [index: number]: string;
+}
+
+declare var MediaList: {
+    prototype: MediaList;
+    new(): MediaList;
+};
+
+interface MediaQueryList {
+    readonly matches: boolean;
+    readonly media: string;
+    addListener(listener: MediaQueryListListener): void;
+    removeListener(listener: MediaQueryListListener): void;
+}
+
+declare var MediaQueryList: {
+    prototype: MediaQueryList;
+    new(): MediaQueryList;
+};
+
+interface MediaSource extends EventTarget {
+    readonly activeSourceBuffers: SourceBufferList;
+    duration: number;
+    readonly readyState: string;
+    readonly sourceBuffers: SourceBufferList;
+    addSourceBuffer(type: string): SourceBuffer;
+    endOfStream(error?: number): void;
+    removeSourceBuffer(sourceBuffer: SourceBuffer): void;
+}
+
+declare var MediaSource: {
+    prototype: MediaSource;
+    new(): MediaSource;
+    isTypeSupported(type: string): boolean;
+};
+
+interface MediaStreamEventMap {
+    "active": Event;
+    "addtrack": MediaStreamTrackEvent;
+    "inactive": Event;
+    "removetrack": MediaStreamTrackEvent;
+}
+
+interface MediaStream extends EventTarget {
+    readonly active: boolean;
+    readonly id: string;
+    onactive: (this: MediaStream, ev: Event) => any;
+    onaddtrack: (this: MediaStream, ev: MediaStreamTrackEvent) => any;
+    oninactive: (this: MediaStream, ev: Event) => any;
+    onremovetrack: (this: MediaStream, ev: MediaStreamTrackEvent) => any;
+    addTrack(track: MediaStreamTrack): void;
+    clone(): MediaStream;
+    getAudioTracks(): MediaStreamTrack[];
+    getTrackById(trackId: string): MediaStreamTrack | null;
+    getTracks(): MediaStreamTrack[];
+    getVideoTracks(): MediaStreamTrack[];
+    removeTrack(track: MediaStreamTrack): void;
+    stop(): void;
+    addEventListener<K extends keyof MediaStreamEventMap>(type: K, listener: (this: MediaStream, ev: MediaStreamEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MediaStream: {
+    prototype: MediaStream;
+    new(streamOrTracks?: MediaStream | MediaStreamTrack[]): MediaStream;
+};
+
+interface MediaStreamAudioSourceNode extends AudioNode {
+}
+
+declare var MediaStreamAudioSourceNode: {
+    prototype: MediaStreamAudioSourceNode;
+    new(): MediaStreamAudioSourceNode;
+};
+
+interface MediaStreamError {
+    readonly constraintName: string | null;
+    readonly message: string | null;
+    readonly name: string;
+}
+
+declare var MediaStreamError: {
+    prototype: MediaStreamError;
+    new(): MediaStreamError;
+};
+
+interface MediaStreamErrorEvent extends Event {
+    readonly error: MediaStreamError | null;
+}
+
+declare var MediaStreamErrorEvent: {
+    prototype: MediaStreamErrorEvent;
+    new(typeArg: string, eventInitDict?: MediaStreamErrorEventInit): MediaStreamErrorEvent;
+};
+
+interface MediaStreamEvent extends Event {
+    readonly stream: MediaStream | null;
+}
+
+declare var MediaStreamEvent: {
+    prototype: MediaStreamEvent;
+    new(type: string, eventInitDict: MediaStreamEventInit): MediaStreamEvent;
+};
+
+interface MediaStreamTrackEventMap {
+    "ended": MediaStreamErrorEvent;
+    "mute": Event;
+    "overconstrained": MediaStreamErrorEvent;
+    "unmute": Event;
+}
+
+interface MediaStreamTrack extends EventTarget {
+    enabled: boolean;
+    readonly id: string;
+    readonly kind: string;
+    readonly label: string;
+    readonly muted: boolean;
+    onended: (this: MediaStreamTrack, ev: MediaStreamErrorEvent) => any;
+    onmute: (this: MediaStreamTrack, ev: Event) => any;
+    onoverconstrained: (this: MediaStreamTrack, ev: MediaStreamErrorEvent) => any;
+    onunmute: (this: MediaStreamTrack, ev: Event) => any;
+    readonly readonly: boolean;
+    readonly readyState: MediaStreamTrackState;
+    readonly remote: boolean;
+    applyConstraints(constraints: MediaTrackConstraints): Promise<void>;
+    clone(): MediaStreamTrack;
+    getCapabilities(): MediaTrackCapabilities;
+    getConstraints(): MediaTrackConstraints;
+    getSettings(): MediaTrackSettings;
+    stop(): void;
+    addEventListener<K extends keyof MediaStreamTrackEventMap>(type: K, listener: (this: MediaStreamTrack, ev: MediaStreamTrackEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MediaStreamTrack: {
+    prototype: MediaStreamTrack;
+    new(): MediaStreamTrack;
+};
+
+interface MediaStreamTrackEvent extends Event {
+    readonly track: MediaStreamTrack;
+}
+
+declare var MediaStreamTrackEvent: {
+    prototype: MediaStreamTrackEvent;
+    new(typeArg: string, eventInitDict?: MediaStreamTrackEventInit): MediaStreamTrackEvent;
+};
+
+interface MessageChannel {
+    readonly port1: MessagePort;
+    readonly port2: MessagePort;
+}
+
+declare var MessageChannel: {
+    prototype: MessageChannel;
+    new(): MessageChannel;
+};
+
+interface MessageEvent extends Event {
+    readonly data: any;
+    readonly origin: string;
+    readonly ports: any;
+    readonly source: Window;
+    initMessageEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, dataArg: any, originArg: string, lastEventIdArg: string, sourceArg: Window): void;
+}
+
+declare var MessageEvent: {
+    prototype: MessageEvent;
+    new(type: string, eventInitDict?: MessageEventInit): MessageEvent;
+};
+
+interface MessagePortEventMap {
+    "message": MessageEvent;
+}
+
+interface MessagePort extends EventTarget {
+    onmessage: (this: MessagePort, ev: MessageEvent) => any;
+    close(): void;
+    postMessage(message?: any, transfer?: any[]): void;
+    start(): void;
+    addEventListener<K extends keyof MessagePortEventMap>(type: K, listener: (this: MessagePort, ev: MessagePortEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MessagePort: {
+    prototype: MessagePort;
+    new(): MessagePort;
+};
+
+interface MimeType {
+    readonly description: string;
+    readonly enabledPlugin: Plugin;
+    readonly suffixes: string;
+    readonly type: string;
+}
+
+declare var MimeType: {
+    prototype: MimeType;
+    new(): MimeType;
+};
+
+interface MimeTypeArray {
+    readonly length: number;
+    item(index: number): Plugin;
+    namedItem(type: string): Plugin;
+    [index: number]: Plugin;
+}
+
+declare var MimeTypeArray: {
+    prototype: MimeTypeArray;
+    new(): MimeTypeArray;
+};
+
+interface MouseEvent extends UIEvent {
+    readonly altKey: boolean;
+    readonly button: number;
+    readonly buttons: number;
+    readonly clientX: number;
+    readonly clientY: number;
+    readonly ctrlKey: boolean;
+    readonly fromElement: Element;
+    readonly layerX: number;
+    readonly layerY: number;
+    readonly metaKey: boolean;
+    readonly movementX: number;
+    readonly movementY: number;
+    readonly offsetX: number;
+    readonly offsetY: number;
+    readonly pageX: number;
+    readonly pageY: number;
+    readonly relatedTarget: EventTarget;
+    readonly screenX: number;
+    readonly screenY: number;
+    readonly shiftKey: boolean;
+    readonly toElement: Element;
+    readonly which: number;
+    readonly x: number;
+    readonly y: number;
+    getModifierState(keyArg: string): boolean;
+    initMouseEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, ctrlKeyArg: boolean, altKeyArg: boolean, shiftKeyArg: boolean, metaKeyArg: boolean, buttonArg: number, relatedTargetArg: EventTarget | null): void;
+}
+
+declare var MouseEvent: {
+    prototype: MouseEvent;
+    new(typeArg: string, eventInitDict?: MouseEventInit): MouseEvent;
+};
+
+interface MSApp {
+    clearTemporaryWebDataAsync(): MSAppAsyncOperation;
+    createBlobFromRandomAccessStream(type: string, seeker: any): Blob;
+    createDataPackage(object: any): any;
+    createDataPackageFromSelection(): any;
+    createFileFromStorageFile(storageFile: any): File;
+    createStreamFromInputStream(type: string, inputStream: any): MSStream;
+    execAsyncAtPriority(asynchronousCallback: MSExecAtPriorityFunctionCallback, priority: string, ...args: any[]): void;
+    execAtPriority(synchronousCallback: MSExecAtPriorityFunctionCallback, priority: string, ...args: any[]): any;
+    getCurrentPriority(): string;
+    getHtmlPrintDocumentSourceAsync(htmlDoc: any): Promise<any>;
+    getViewId(view: any): any;
+    isTaskScheduledAtPriorityOrHigher(priority: string): boolean;
+    pageHandlesAllApplicationActivations(enabled: boolean): void;
+    suppressSubdownloadCredentialPrompts(suppress: boolean): void;
+    terminateApp(exceptionObject: any): void;
+    readonly CURRENT: string;
+    readonly HIGH: string;
+    readonly IDLE: string;
+    readonly NORMAL: string;
+}
+declare var MSApp: MSApp;
+
+interface MSAppAsyncOperationEventMap {
+    "complete": Event;
+    "error": Event;
+}
+
+interface MSAppAsyncOperation extends EventTarget {
+    readonly error: DOMError;
+    oncomplete: (this: MSAppAsyncOperation, ev: Event) => any;
+    onerror: (this: MSAppAsyncOperation, ev: Event) => any;
+    readonly readyState: number;
+    readonly result: any;
+    start(): void;
+    readonly COMPLETED: number;
+    readonly ERROR: number;
+    readonly STARTED: number;
+    addEventListener<K extends keyof MSAppAsyncOperationEventMap>(type: K, listener: (this: MSAppAsyncOperation, ev: MSAppAsyncOperationEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MSAppAsyncOperation: {
+    prototype: MSAppAsyncOperation;
+    new(): MSAppAsyncOperation;
+    readonly COMPLETED: number;
+    readonly ERROR: number;
+    readonly STARTED: number;
+};
+
+interface MSAssertion {
+    readonly id: string;
+    readonly type: MSCredentialType;
+}
+
+declare var MSAssertion: {
+    prototype: MSAssertion;
+    new(): MSAssertion;
+};
+
+interface MSBlobBuilder {
+    append(data: any, endings?: string): void;
+    getBlob(contentType?: string): Blob;
+}
+
+declare var MSBlobBuilder: {
+    prototype: MSBlobBuilder;
+    new(): MSBlobBuilder;
+};
+
+interface MSCredentials {
+    getAssertion(challenge: string, filter?: MSCredentialFilter, params?: MSSignatureParameters): Promise<MSAssertion>;
+    makeCredential(accountInfo: MSAccountInfo, params: MSCredentialParameters[], challenge?: string): Promise<MSAssertion>;
+}
+
+declare var MSCredentials: {
+    prototype: MSCredentials;
+    new(): MSCredentials;
+};
+
+interface MSFIDOCredentialAssertion extends MSAssertion {
+    readonly algorithm: string | Algorithm;
+    readonly attestation: any;
+    readonly publicKey: string;
+    readonly transportHints: MSTransportType[];
+}
+
+declare var MSFIDOCredentialAssertion: {
+    prototype: MSFIDOCredentialAssertion;
+    new(): MSFIDOCredentialAssertion;
+};
+
+interface MSFIDOSignature {
+    readonly authnrData: string;
+    readonly clientData: string;
+    readonly signature: string;
+}
+
+declare var MSFIDOSignature: {
+    prototype: MSFIDOSignature;
+    new(): MSFIDOSignature;
+};
+
+interface MSFIDOSignatureAssertion extends MSAssertion {
+    readonly signature: MSFIDOSignature;
+}
+
+declare var MSFIDOSignatureAssertion: {
+    prototype: MSFIDOSignatureAssertion;
+    new(): MSFIDOSignatureAssertion;
+};
+
+interface MSGesture {
+    target: Element;
+    addPointer(pointerId: number): void;
+    stop(): void;
+}
+
+declare var MSGesture: {
+    prototype: MSGesture;
+    new(): MSGesture;
+};
+
+interface MSGestureEvent extends UIEvent {
+    readonly clientX: number;
+    readonly clientY: number;
+    readonly expansion: number;
+    readonly gestureObject: any;
+    readonly hwTimestamp: number;
+    readonly offsetX: number;
+    readonly offsetY: number;
+    readonly rotation: number;
+    readonly scale: number;
+    readonly screenX: number;
+    readonly screenY: number;
+    readonly translationX: number;
+    readonly translationY: number;
+    readonly velocityAngular: number;
+    readonly velocityExpansion: number;
+    readonly velocityX: number;
+    readonly velocityY: number;
+    initGestureEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, offsetXArg: number, offsetYArg: number, translationXArg: number, translationYArg: number, scaleArg: number, expansionArg: number, rotationArg: number, velocityXArg: number, velocityYArg: number, velocityExpansionArg: number, velocityAngularArg: number, hwTimestampArg: number): void;
+    readonly MSGESTURE_FLAG_BEGIN: number;
+    readonly MSGESTURE_FLAG_CANCEL: number;
+    readonly MSGESTURE_FLAG_END: number;
+    readonly MSGESTURE_FLAG_INERTIA: number;
+    readonly MSGESTURE_FLAG_NONE: number;
+}
+
+declare var MSGestureEvent: {
+    prototype: MSGestureEvent;
+    new(): MSGestureEvent;
+    readonly MSGESTURE_FLAG_BEGIN: number;
+    readonly MSGESTURE_FLAG_CANCEL: number;
+    readonly MSGESTURE_FLAG_END: number;
+    readonly MSGESTURE_FLAG_INERTIA: number;
+    readonly MSGESTURE_FLAG_NONE: number;
+};
+
+interface MSGraphicsTrust {
+    readonly constrictionActive: boolean;
+    readonly status: string;
+}
+
+declare var MSGraphicsTrust: {
+    prototype: MSGraphicsTrust;
+    new(): MSGraphicsTrust;
+};
+
+interface MSHTMLWebViewElement extends HTMLElement {
+    readonly canGoBack: boolean;
+    readonly canGoForward: boolean;
+    readonly containsFullScreenElement: boolean;
+    readonly documentTitle: string;
+    height: number;
+    readonly settings: MSWebViewSettings;
+    src: string;
+    width: number;
+    addWebAllowedObject(name: string, applicationObject: any): void;
+    buildLocalStreamUri(contentIdentifier: string, relativePath: string): string;
+    capturePreviewToBlobAsync(): MSWebViewAsyncOperation;
+    captureSelectedContentToDataPackageAsync(): MSWebViewAsyncOperation;
+    getDeferredPermissionRequestById(id: number): DeferredPermissionRequest;
+    getDeferredPermissionRequests(): DeferredPermissionRequest[];
+    goBack(): void;
+    goForward(): void;
+    invokeScriptAsync(scriptName: string, ...args: any[]): MSWebViewAsyncOperation;
+    navigate(uri: string): void;
+    navigateFocus(navigationReason: NavigationReason, origin: FocusNavigationOrigin): void;
+    navigateToLocalStreamUri(source: string, streamResolver: any): void;
+    navigateToString(contents: string): void;
+    navigateWithHttpRequestMessage(requestMessage: any): void;
+    refresh(): void;
+    stop(): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: MSHTMLWebViewElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MSHTMLWebViewElement: {
+    prototype: MSHTMLWebViewElement;
+    new(): MSHTMLWebViewElement;
+};
+
+interface MSInputMethodContextEventMap {
+    "MSCandidateWindowHide": Event;
+    "MSCandidateWindowShow": Event;
+    "MSCandidateWindowUpdate": Event;
+}
+
+interface MSInputMethodContext extends EventTarget {
+    readonly compositionEndOffset: number;
+    readonly compositionStartOffset: number;
+    oncandidatewindowhide: (this: MSInputMethodContext, ev: Event) => any;
+    oncandidatewindowshow: (this: MSInputMethodContext, ev: Event) => any;
+    oncandidatewindowupdate: (this: MSInputMethodContext, ev: Event) => any;
+    readonly target: HTMLElement;
+    getCandidateWindowClientRect(): ClientRect;
+    getCompositionAlternatives(): string[];
+    hasComposition(): boolean;
+    isCandidateWindowVisible(): boolean;
+    addEventListener<K extends keyof MSInputMethodContextEventMap>(type: K, listener: (this: MSInputMethodContext, ev: MSInputMethodContextEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MSInputMethodContext: {
+    prototype: MSInputMethodContext;
+    new(): MSInputMethodContext;
+};
+
+interface MSManipulationEvent extends UIEvent {
+    readonly currentState: number;
+    readonly inertiaDestinationX: number;
+    readonly inertiaDestinationY: number;
+    readonly lastState: number;
+    initMSManipulationEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, lastState: number, currentState: number): void;
+    readonly MS_MANIPULATION_STATE_ACTIVE: number;
+    readonly MS_MANIPULATION_STATE_CANCELLED: number;
+    readonly MS_MANIPULATION_STATE_COMMITTED: number;
+    readonly MS_MANIPULATION_STATE_DRAGGING: number;
+    readonly MS_MANIPULATION_STATE_INERTIA: number;
+    readonly MS_MANIPULATION_STATE_PRESELECT: number;
+    readonly MS_MANIPULATION_STATE_SELECTING: number;
+    readonly MS_MANIPULATION_STATE_STOPPED: number;
+}
+
+declare var MSManipulationEvent: {
+    prototype: MSManipulationEvent;
+    new(): MSManipulationEvent;
+    readonly MS_MANIPULATION_STATE_ACTIVE: number;
+    readonly MS_MANIPULATION_STATE_CANCELLED: number;
+    readonly MS_MANIPULATION_STATE_COMMITTED: number;
+    readonly MS_MANIPULATION_STATE_DRAGGING: number;
+    readonly MS_MANIPULATION_STATE_INERTIA: number;
+    readonly MS_MANIPULATION_STATE_PRESELECT: number;
+    readonly MS_MANIPULATION_STATE_SELECTING: number;
+    readonly MS_MANIPULATION_STATE_STOPPED: number;
+};
+
+interface MSMediaKeyError {
+    readonly code: number;
+    readonly systemCode: number;
+    readonly MS_MEDIA_KEYERR_CLIENT: number;
+    readonly MS_MEDIA_KEYERR_DOMAIN: number;
+    readonly MS_MEDIA_KEYERR_HARDWARECHANGE: number;
+    readonly MS_MEDIA_KEYERR_OUTPUT: number;
+    readonly MS_MEDIA_KEYERR_SERVICE: number;
+    readonly MS_MEDIA_KEYERR_UNKNOWN: number;
+}
+
+declare var MSMediaKeyError: {
+    prototype: MSMediaKeyError;
+    new(): MSMediaKeyError;
+    readonly MS_MEDIA_KEYERR_CLIENT: number;
+    readonly MS_MEDIA_KEYERR_DOMAIN: number;
+    readonly MS_MEDIA_KEYERR_HARDWARECHANGE: number;
+    readonly MS_MEDIA_KEYERR_OUTPUT: number;
+    readonly MS_MEDIA_KEYERR_SERVICE: number;
+    readonly MS_MEDIA_KEYERR_UNKNOWN: number;
+};
+
+interface MSMediaKeyMessageEvent extends Event {
+    readonly destinationURL: string | null;
+    readonly message: Uint8Array;
+}
+
+declare var MSMediaKeyMessageEvent: {
+    prototype: MSMediaKeyMessageEvent;
+    new(): MSMediaKeyMessageEvent;
+};
+
+interface MSMediaKeyNeededEvent extends Event {
+    readonly initData: Uint8Array | null;
+}
+
+declare var MSMediaKeyNeededEvent: {
+    prototype: MSMediaKeyNeededEvent;
+    new(): MSMediaKeyNeededEvent;
+};
+
+interface MSMediaKeys {
+    readonly keySystem: string;
+    createSession(type: string, initData: Uint8Array, cdmData?: Uint8Array): MSMediaKeySession;
+}
+
+declare var MSMediaKeys: {
+    prototype: MSMediaKeys;
+    new(keySystem: string): MSMediaKeys;
+    isTypeSupported(keySystem: string, type?: string): boolean;
+    isTypeSupportedWithFeatures(keySystem: string, type?: string): string;
+};
+
+interface MSMediaKeySession extends EventTarget {
+    readonly error: MSMediaKeyError | null;
+    readonly keySystem: string;
+    readonly sessionId: string;
+    close(): void;
+    update(key: Uint8Array): void;
+}
+
+declare var MSMediaKeySession: {
+    prototype: MSMediaKeySession;
+    new(): MSMediaKeySession;
+};
+
+interface MSPointerEvent extends MouseEvent {
+    readonly currentPoint: any;
+    readonly height: number;
+    readonly hwTimestamp: number;
+    readonly intermediatePoints: any;
+    readonly isPrimary: boolean;
+    readonly pointerId: number;
+    readonly pointerType: any;
+    readonly pressure: number;
+    readonly rotation: number;
+    readonly tiltX: number;
+    readonly tiltY: number;
+    readonly width: number;
+    getCurrentPoint(element: Element): void;
+    getIntermediatePoints(element: Element): void;
+    initPointerEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, ctrlKeyArg: boolean, altKeyArg: boolean, shiftKeyArg: boolean, metaKeyArg: boolean, buttonArg: number, relatedTargetArg: EventTarget, offsetXArg: number, offsetYArg: number, widthArg: number, heightArg: number, pressure: number, rotation: number, tiltX: number, tiltY: number, pointerIdArg: number, pointerType: any, hwTimestampArg: number, isPrimary: boolean): void;
+}
+
+declare var MSPointerEvent: {
+    prototype: MSPointerEvent;
+    new(typeArg: string, eventInitDict?: PointerEventInit): MSPointerEvent;
+};
+
+interface MSRangeCollection {
+    readonly length: number;
+    item(index: number): Range;
+    [index: number]: Range;
+}
+
+declare var MSRangeCollection: {
+    prototype: MSRangeCollection;
+    new(): MSRangeCollection;
+};
+
+interface MSSiteModeEvent extends Event {
+    readonly actionURL: string;
+    readonly buttonID: number;
+}
+
+declare var MSSiteModeEvent: {
+    prototype: MSSiteModeEvent;
+    new(): MSSiteModeEvent;
+};
+
+interface MSStream {
+    readonly type: string;
+    msClose(): void;
+    msDetachStream(): any;
+}
+
+declare var MSStream: {
+    prototype: MSStream;
+    new(): MSStream;
+};
+
+interface MSStreamReader extends EventTarget, MSBaseReader {
+    readonly error: DOMError;
+    readAsArrayBuffer(stream: MSStream, size?: number): void;
+    readAsBinaryString(stream: MSStream, size?: number): void;
+    readAsBlob(stream: MSStream, size?: number): void;
+    readAsDataURL(stream: MSStream, size?: number): void;
+    readAsText(stream: MSStream, encoding?: string, size?: number): void;
+    addEventListener<K extends keyof MSBaseReaderEventMap>(type: K, listener: (this: MSStreamReader, ev: MSBaseReaderEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MSStreamReader: {
+    prototype: MSStreamReader;
+    new(): MSStreamReader;
+};
+
+interface MSWebViewAsyncOperationEventMap {
+    "complete": Event;
+    "error": Event;
+}
+
+interface MSWebViewAsyncOperation extends EventTarget {
+    readonly error: DOMError;
+    oncomplete: (this: MSWebViewAsyncOperation, ev: Event) => any;
+    onerror: (this: MSWebViewAsyncOperation, ev: Event) => any;
+    readonly readyState: number;
+    readonly result: any;
+    readonly target: MSHTMLWebViewElement;
+    readonly type: number;
+    start(): void;
+    readonly COMPLETED: number;
+    readonly ERROR: number;
+    readonly STARTED: number;
+    readonly TYPE_CAPTURE_PREVIEW_TO_RANDOM_ACCESS_STREAM: number;
+    readonly TYPE_CREATE_DATA_PACKAGE_FROM_SELECTION: number;
+    readonly TYPE_INVOKE_SCRIPT: number;
+    addEventListener<K extends keyof MSWebViewAsyncOperationEventMap>(type: K, listener: (this: MSWebViewAsyncOperation, ev: MSWebViewAsyncOperationEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MSWebViewAsyncOperation: {
+    prototype: MSWebViewAsyncOperation;
+    new(): MSWebViewAsyncOperation;
+    readonly COMPLETED: number;
+    readonly ERROR: number;
+    readonly STARTED: number;
+    readonly TYPE_CAPTURE_PREVIEW_TO_RANDOM_ACCESS_STREAM: number;
+    readonly TYPE_CREATE_DATA_PACKAGE_FROM_SELECTION: number;
+    readonly TYPE_INVOKE_SCRIPT: number;
+};
+
+interface MSWebViewSettings {
+    isIndexedDBEnabled: boolean;
+    isJavaScriptEnabled: boolean;
+}
+
+declare var MSWebViewSettings: {
+    prototype: MSWebViewSettings;
+    new(): MSWebViewSettings;
+};
+
+interface MutationEvent extends Event {
+    readonly attrChange: number;
+    readonly attrName: string;
+    readonly newValue: string;
+    readonly prevValue: string;
+    readonly relatedNode: Node;
+    initMutationEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, relatedNodeArg: Node, prevValueArg: string, newValueArg: string, attrNameArg: string, attrChangeArg: number): void;
+    readonly ADDITION: number;
+    readonly MODIFICATION: number;
+    readonly REMOVAL: number;
+}
+
+declare var MutationEvent: {
+    prototype: MutationEvent;
+    new(): MutationEvent;
+    readonly ADDITION: number;
+    readonly MODIFICATION: number;
+    readonly REMOVAL: number;
+};
+
+interface MutationObserver {
+    disconnect(): void;
+    observe(target: Node, options: MutationObserverInit): void;
+    takeRecords(): MutationRecord[];
+}
+
+declare var MutationObserver: {
+    prototype: MutationObserver;
+    new(callback: MutationCallback): MutationObserver;
+};
+
+interface MutationRecord {
+    readonly addedNodes: NodeList;
+    readonly attributeName: string | null;
+    readonly attributeNamespace: string | null;
+    readonly nextSibling: Node | null;
+    readonly oldValue: string | null;
+    readonly previousSibling: Node | null;
+    readonly removedNodes: NodeList;
+    readonly target: Node;
+    readonly type: string;
+}
+
+declare var MutationRecord: {
+    prototype: MutationRecord;
+    new(): MutationRecord;
+};
+
+interface NamedNodeMap {
+    readonly length: number;
+    getNamedItem(name: string): Attr;
+    getNamedItemNS(namespaceURI: string | null, localName: string | null): Attr;
+    item(index: number): Attr;
+    removeNamedItem(name: string): Attr;
+    removeNamedItemNS(namespaceURI: string | null, localName: string | null): Attr;
+    setNamedItem(arg: Attr): Attr;
+    setNamedItemNS(arg: Attr): Attr;
+    [index: number]: Attr;
+}
+
+declare var NamedNodeMap: {
+    prototype: NamedNodeMap;
+    new(): NamedNodeMap;
+};
+
+interface NavigationCompletedEvent extends NavigationEvent {
+    readonly isSuccess: boolean;
+    readonly webErrorStatus: number;
+}
+
+declare var NavigationCompletedEvent: {
+    prototype: NavigationCompletedEvent;
+    new(): NavigationCompletedEvent;
+};
+
+interface NavigationEvent extends Event {
+    readonly uri: string;
+}
+
+declare var NavigationEvent: {
+    prototype: NavigationEvent;
+    new(): NavigationEvent;
+};
+
+interface NavigationEventWithReferrer extends NavigationEvent {
+    readonly referer: string;
+}
+
+declare var NavigationEventWithReferrer: {
+    prototype: NavigationEventWithReferrer;
+    new(): NavigationEventWithReferrer;
+};
+
+interface Navigator extends Object, NavigatorID, NavigatorOnLine, NavigatorContentUtils, NavigatorStorageUtils, NavigatorGeolocation, MSNavigatorDoNotTrack, MSFileSaver, NavigatorBeacon, NavigatorConcurrentHardware, NavigatorUserMedia {
+    readonly authentication: WebAuthentication;
+    readonly cookieEnabled: boolean;
+    gamepadInputEmulation: GamepadInputEmulationType;
+    readonly language: string;
+    readonly maxTouchPoints: number;
+    readonly mimeTypes: MimeTypeArray;
+    readonly msManipulationViewsEnabled: boolean;
+    readonly msMaxTouchPoints: number;
+    readonly msPointerEnabled: boolean;
+    readonly plugins: PluginArray;
+    readonly pointerEnabled: boolean;
+    readonly serviceWorker: ServiceWorkerContainer;
+    readonly webdriver: boolean;
+    readonly hardwareConcurrency: number;
+    readonly languages: string[];
+    getGamepads(): Gamepad[];
+    javaEnabled(): boolean;
+    msLaunchUri(uri: string, successCallback?: MSLaunchUriCallback, noHandlerCallback?: MSLaunchUriCallback): void;
+    requestMediaKeySystemAccess(keySystem: string, supportedConfigurations: MediaKeySystemConfiguration[]): Promise<MediaKeySystemAccess>;
+    vibrate(pattern: number | number[]): boolean;
+}
+
+declare var Navigator: {
+    prototype: Navigator;
+    new(): Navigator;
+};
+
+interface Node extends EventTarget {
+    readonly attributes: NamedNodeMap;
+    readonly baseURI: string | null;
+    readonly childNodes: NodeList;
+    readonly firstChild: Node | null;
+    readonly lastChild: Node | null;
+    readonly localName: string | null;
+    readonly namespaceURI: string | null;
+    readonly nextSibling: Node | null;
+    readonly nodeName: string;
+    readonly nodeType: number;
+    nodeValue: string | null;
+    readonly ownerDocument: Document;
+    readonly parentElement: HTMLElement | null;
+    readonly parentNode: Node | null;
+    readonly previousSibling: Node | null;
+    textContent: string | null;
+    appendChild<T extends Node>(newChild: T): T;
+    cloneNode(deep?: boolean): Node;
+    compareDocumentPosition(other: Node): number;
+    contains(child: Node): boolean;
+    hasAttributes(): boolean;
+    hasChildNodes(): boolean;
+    insertBefore<T extends Node>(newChild: T, refChild: Node | null): T;
+    isDefaultNamespace(namespaceURI: string | null): boolean;
+    isEqualNode(arg: Node): boolean;
+    isSameNode(other: Node): boolean;
+    lookupNamespaceURI(prefix: string | null): string | null;
+    lookupPrefix(namespaceURI: string | null): string | null;
+    normalize(): void;
+    removeChild<T extends Node>(oldChild: T): T;
+    replaceChild<T extends Node>(newChild: Node, oldChild: T): T;
+    readonly ATTRIBUTE_NODE: number;
+    readonly CDATA_SECTION_NODE: number;
+    readonly COMMENT_NODE: number;
+    readonly DOCUMENT_FRAGMENT_NODE: number;
+    readonly DOCUMENT_NODE: number;
+    readonly DOCUMENT_POSITION_CONTAINED_BY: number;
+    readonly DOCUMENT_POSITION_CONTAINS: number;
+    readonly DOCUMENT_POSITION_DISCONNECTED: number;
+    readonly DOCUMENT_POSITION_FOLLOWING: number;
+    readonly DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC: number;
+    readonly DOCUMENT_POSITION_PRECEDING: number;
+    readonly DOCUMENT_TYPE_NODE: number;
+    readonly ELEMENT_NODE: number;
+    readonly ENTITY_NODE: number;
+    readonly ENTITY_REFERENCE_NODE: number;
+    readonly NOTATION_NODE: number;
+    readonly PROCESSING_INSTRUCTION_NODE: number;
+    readonly TEXT_NODE: number;
+}
+
+declare var Node: {
+    prototype: Node;
+    new(): Node;
+    readonly ATTRIBUTE_NODE: number;
+    readonly CDATA_SECTION_NODE: number;
+    readonly COMMENT_NODE: number;
+    readonly DOCUMENT_FRAGMENT_NODE: number;
+    readonly DOCUMENT_NODE: number;
+    readonly DOCUMENT_POSITION_CONTAINED_BY: number;
+    readonly DOCUMENT_POSITION_CONTAINS: number;
+    readonly DOCUMENT_POSITION_DISCONNECTED: number;
+    readonly DOCUMENT_POSITION_FOLLOWING: number;
+    readonly DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC: number;
+    readonly DOCUMENT_POSITION_PRECEDING: number;
+    readonly DOCUMENT_TYPE_NODE: number;
+    readonly ELEMENT_NODE: number;
+    readonly ENTITY_NODE: number;
+    readonly ENTITY_REFERENCE_NODE: number;
+    readonly NOTATION_NODE: number;
+    readonly PROCESSING_INSTRUCTION_NODE: number;
+    readonly TEXT_NODE: number;
+};
+
+interface NodeFilter {
+    acceptNode(n: Node): number;
+}
+
+declare var NodeFilter: {
+    readonly FILTER_ACCEPT: number;
+    readonly FILTER_REJECT: number;
+    readonly FILTER_SKIP: number;
+    readonly SHOW_ALL: number;
+    readonly SHOW_ATTRIBUTE: number;
+    readonly SHOW_CDATA_SECTION: number;
+    readonly SHOW_COMMENT: number;
+    readonly SHOW_DOCUMENT: number;
+    readonly SHOW_DOCUMENT_FRAGMENT: number;
+    readonly SHOW_DOCUMENT_TYPE: number;
+    readonly SHOW_ELEMENT: number;
+    readonly SHOW_ENTITY: number;
+    readonly SHOW_ENTITY_REFERENCE: number;
+    readonly SHOW_NOTATION: number;
+    readonly SHOW_PROCESSING_INSTRUCTION: number;
+    readonly SHOW_TEXT: number;
+};
+
+interface NodeIterator {
+    readonly expandEntityReferences: boolean;
+    readonly filter: NodeFilter;
+    readonly root: Node;
+    readonly whatToShow: number;
+    detach(): void;
+    nextNode(): Node;
+    previousNode(): Node;
+}
+
+declare var NodeIterator: {
+    prototype: NodeIterator;
+    new(): NodeIterator;
+};
+
+interface NodeList {
+    readonly length: number;
+    item(index: number): Node;
+    [index: number]: Node;
+}
+
+declare var NodeList: {
+    prototype: NodeList;
+    new(): NodeList;
+};
+
+interface NotificationEventMap {
+    "click": Event;
+    "close": Event;
+    "error": Event;
+    "show": Event;
+}
+
+interface Notification extends EventTarget {
+    readonly body: string;
+    readonly dir: NotificationDirection;
+    readonly icon: string;
+    readonly lang: string;
+    onclick: (this: Notification, ev: Event) => any;
+    onclose: (this: Notification, ev: Event) => any;
+    onerror: (this: Notification, ev: Event) => any;
+    onshow: (this: Notification, ev: Event) => any;
+    readonly permission: NotificationPermission;
+    readonly tag: string;
+    readonly title: string;
+    close(): void;
+    addEventListener<K extends keyof NotificationEventMap>(type: K, listener: (this: Notification, ev: NotificationEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var Notification: {
+    prototype: Notification;
+    new(title: string, options?: NotificationOptions): Notification;
+    requestPermission(callback?: NotificationPermissionCallback): Promise<NotificationPermission>;
+};
+
+interface OES_element_index_uint {
+}
+
+declare var OES_element_index_uint: {
+    prototype: OES_element_index_uint;
+    new(): OES_element_index_uint;
+};
+
+interface OES_standard_derivatives {
+    readonly FRAGMENT_SHADER_DERIVATIVE_HINT_OES: number;
+}
+
+declare var OES_standard_derivatives: {
+    prototype: OES_standard_derivatives;
+    new(): OES_standard_derivatives;
+    readonly FRAGMENT_SHADER_DERIVATIVE_HINT_OES: number;
+};
+
+interface OES_texture_float {
+}
+
+declare var OES_texture_float: {
+    prototype: OES_texture_float;
+    new(): OES_texture_float;
+};
+
+interface OES_texture_float_linear {
+}
+
+declare var OES_texture_float_linear: {
+    prototype: OES_texture_float_linear;
+    new(): OES_texture_float_linear;
+};
+
+interface OES_texture_half_float {
+    readonly HALF_FLOAT_OES: number;
+}
+
+declare var OES_texture_half_float: {
+    prototype: OES_texture_half_float;
+    new(): OES_texture_half_float;
+    readonly HALF_FLOAT_OES: number;
+};
+
+interface OES_texture_half_float_linear {
+}
+
+declare var OES_texture_half_float_linear: {
+    prototype: OES_texture_half_float_linear;
+    new(): OES_texture_half_float_linear;
+};
+
+interface OfflineAudioCompletionEvent extends Event {
+    readonly renderedBuffer: AudioBuffer;
+}
+
+declare var OfflineAudioCompletionEvent: {
+    prototype: OfflineAudioCompletionEvent;
+    new(): OfflineAudioCompletionEvent;
+};
+
+interface OfflineAudioContextEventMap extends AudioContextEventMap {
+    "complete": OfflineAudioCompletionEvent;
+}
+
+interface OfflineAudioContext extends AudioContextBase {
+    readonly length: number;
+    oncomplete: (this: OfflineAudioContext, ev: OfflineAudioCompletionEvent) => any;
+    startRendering(): Promise<AudioBuffer>;
+    suspend(suspendTime: number): Promise<void>;
+    addEventListener<K extends keyof OfflineAudioContextEventMap>(type: K, listener: (this: OfflineAudioContext, ev: OfflineAudioContextEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var OfflineAudioContext: {
+    prototype: OfflineAudioContext;
+    new(numberOfChannels: number, length: number, sampleRate: number): OfflineAudioContext;
+};
+
+interface OscillatorNodeEventMap {
+    "ended": MediaStreamErrorEvent;
+}
+
+interface OscillatorNode extends AudioNode {
+    readonly detune: AudioParam;
+    readonly frequency: AudioParam;
+    onended: (this: OscillatorNode, ev: MediaStreamErrorEvent) => any;
+    type: OscillatorType;
+    setPeriodicWave(periodicWave: PeriodicWave): void;
+    start(when?: number): void;
+    stop(when?: number): void;
+    addEventListener<K extends keyof OscillatorNodeEventMap>(type: K, listener: (this: OscillatorNode, ev: OscillatorNodeEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var OscillatorNode: {
+    prototype: OscillatorNode;
+    new(): OscillatorNode;
+};
+
+interface OverflowEvent extends UIEvent {
+    readonly horizontalOverflow: boolean;
+    readonly orient: number;
+    readonly verticalOverflow: boolean;
+    readonly BOTH: number;
+    readonly HORIZONTAL: number;
+    readonly VERTICAL: number;
+}
+
+declare var OverflowEvent: {
+    prototype: OverflowEvent;
+    new(): OverflowEvent;
+    readonly BOTH: number;
+    readonly HORIZONTAL: number;
+    readonly VERTICAL: number;
+};
+
+interface PageTransitionEvent extends Event {
+    readonly persisted: boolean;
+}
+
+declare var PageTransitionEvent: {
+    prototype: PageTransitionEvent;
+    new(): PageTransitionEvent;
+};
+
+interface PannerNode extends AudioNode {
+    coneInnerAngle: number;
+    coneOuterAngle: number;
+    coneOuterGain: number;
+    distanceModel: DistanceModelType;
+    maxDistance: number;
+    panningModel: PanningModelType;
+    refDistance: number;
+    rolloffFactor: number;
+    setOrientation(x: number, y: number, z: number): void;
+    setPosition(x: number, y: number, z: number): void;
+    setVelocity(x: number, y: number, z: number): void;
+}
+
+declare var PannerNode: {
+    prototype: PannerNode;
+    new(): PannerNode;
+};
+
+interface Path2D extends Object, CanvasPathMethods {
+}
+
+declare var Path2D: {
+    prototype: Path2D;
+    new(path?: Path2D): Path2D;
+};
+
+interface PaymentAddress {
+    readonly addressLine: string[];
+    readonly city: string;
+    readonly country: string;
+    readonly dependentLocality: string;
+    readonly languageCode: string;
+    readonly organization: string;
+    readonly phone: string;
+    readonly postalCode: string;
+    readonly recipient: string;
+    readonly region: string;
+    readonly sortingCode: string;
+    toJSON(): any;
+}
+
+declare var PaymentAddress: {
+    prototype: PaymentAddress;
+    new(): PaymentAddress;
+};
+
+interface PaymentRequestEventMap {
+    "shippingaddresschange": Event;
+    "shippingoptionchange": Event;
+}
+
+interface PaymentRequest extends EventTarget {
+    onshippingaddresschange: (this: PaymentRequest, ev: Event) => any;
+    onshippingoptionchange: (this: PaymentRequest, ev: Event) => any;
+    readonly shippingAddress: PaymentAddress | null;
+    readonly shippingOption: string | null;
+    readonly shippingType: PaymentShippingType | null;
+    abort(): Promise<void>;
+    show(): Promise<PaymentResponse>;
+    addEventListener<K extends keyof PaymentRequestEventMap>(type: K, listener: (this: PaymentRequest, ev: PaymentRequestEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var PaymentRequest: {
+    prototype: PaymentRequest;
+    new(methodData: PaymentMethodData[], details: PaymentDetails, options?: PaymentOptions): PaymentRequest;
+};
+
+interface PaymentRequestUpdateEvent extends Event {
+    updateWith(d: Promise<PaymentDetails>): void;
+}
+
+declare var PaymentRequestUpdateEvent: {
+    prototype: PaymentRequestUpdateEvent;
+    new(type: string, eventInitDict?: PaymentRequestUpdateEventInit): PaymentRequestUpdateEvent;
+};
+
+interface PaymentResponse {
+    readonly details: any;
+    readonly methodName: string;
+    readonly payerEmail: string | null;
+    readonly payerName: string | null;
+    readonly payerPhone: string | null;
+    readonly shippingAddress: PaymentAddress | null;
+    readonly shippingOption: string | null;
+    complete(result?: PaymentComplete): Promise<void>;
+    toJSON(): any;
+}
+
+declare var PaymentResponse: {
+    prototype: PaymentResponse;
+    new(): PaymentResponse;
+};
+
+interface Performance {
+    readonly navigation: PerformanceNavigation;
+    readonly timing: PerformanceTiming;
+    clearMarks(markName?: string): void;
+    clearMeasures(measureName?: string): void;
+    clearResourceTimings(): void;
+    getEntries(): any;
+    getEntriesByName(name: string, entryType?: string): any;
+    getEntriesByType(entryType: string): any;
+    getMarks(markName?: string): any;
+    getMeasures(measureName?: string): any;
+    mark(markName: string): void;
+    measure(measureName: string, startMarkName?: string, endMarkName?: string): void;
+    now(): number;
+    setResourceTimingBufferSize(maxSize: number): void;
+    toJSON(): any;
+}
+
+declare var Performance: {
+    prototype: Performance;
+    new(): Performance;
+};
+
+interface PerformanceEntry {
+    readonly duration: number;
+    readonly entryType: string;
+    readonly name: string;
+    readonly startTime: number;
+}
+
+declare var PerformanceEntry: {
+    prototype: PerformanceEntry;
+    new(): PerformanceEntry;
+};
+
+interface PerformanceMark extends PerformanceEntry {
+}
+
+declare var PerformanceMark: {
+    prototype: PerformanceMark;
+    new(): PerformanceMark;
+};
+
+interface PerformanceMeasure extends PerformanceEntry {
+}
+
+declare var PerformanceMeasure: {
+    prototype: PerformanceMeasure;
+    new(): PerformanceMeasure;
+};
+
+interface PerformanceNavigation {
+    readonly redirectCount: number;
+    readonly type: number;
+    toJSON(): any;
+    readonly TYPE_BACK_FORWARD: number;
+    readonly TYPE_NAVIGATE: number;
+    readonly TYPE_RELOAD: number;
+    readonly TYPE_RESERVED: number;
+}
+
+declare var PerformanceNavigation: {
+    prototype: PerformanceNavigation;
+    new(): PerformanceNavigation;
+    readonly TYPE_BACK_FORWARD: number;
+    readonly TYPE_NAVIGATE: number;
+    readonly TYPE_RELOAD: number;
+    readonly TYPE_RESERVED: number;
+};
+
+interface PerformanceNavigationTiming extends PerformanceEntry {
+    readonly connectEnd: number;
+    readonly connectStart: number;
+    readonly domainLookupEnd: number;
+    readonly domainLookupStart: number;
+    readonly domComplete: number;
+    readonly domContentLoadedEventEnd: number;
+    readonly domContentLoadedEventStart: number;
+    readonly domInteractive: number;
+    readonly domLoading: number;
+    readonly fetchStart: number;
+    readonly loadEventEnd: number;
+    readonly loadEventStart: number;
+    readonly navigationStart: number;
+    readonly redirectCount: number;
+    readonly redirectEnd: number;
+    readonly redirectStart: number;
+    readonly requestStart: number;
+    readonly responseEnd: number;
+    readonly responseStart: number;
+    readonly type: NavigationType;
+    readonly unloadEventEnd: number;
+    readonly unloadEventStart: number;
+}
+
+declare var PerformanceNavigationTiming: {
+    prototype: PerformanceNavigationTiming;
+    new(): PerformanceNavigationTiming;
+};
+
+interface PerformanceResourceTiming extends PerformanceEntry {
+    readonly connectEnd: number;
+    readonly connectStart: number;
+    readonly domainLookupEnd: number;
+    readonly domainLookupStart: number;
+    readonly fetchStart: number;
+    readonly initiatorType: string;
+    readonly redirectEnd: number;
+    readonly redirectStart: number;
+    readonly requestStart: number;
+    readonly responseEnd: number;
+    readonly responseStart: number;
+}
+
+declare var PerformanceResourceTiming: {
+    prototype: PerformanceResourceTiming;
+    new(): PerformanceResourceTiming;
+};
+
+interface PerformanceTiming {
+    readonly connectEnd: number;
+    readonly connectStart: number;
+    readonly domainLookupEnd: number;
+    readonly domainLookupStart: number;
+    readonly domComplete: number;
+    readonly domContentLoadedEventEnd: number;
+    readonly domContentLoadedEventStart: number;
+    readonly domInteractive: number;
+    readonly domLoading: number;
+    readonly fetchStart: number;
+    readonly loadEventEnd: number;
+    readonly loadEventStart: number;
+    readonly msFirstPaint: number;
+    readonly navigationStart: number;
+    readonly redirectEnd: number;
+    readonly redirectStart: number;
+    readonly requestStart: number;
+    readonly responseEnd: number;
+    readonly responseStart: number;
+    readonly unloadEventEnd: number;
+    readonly unloadEventStart: number;
+    readonly secureConnectionStart: number;
+    toJSON(): any;
+}
+
+declare var PerformanceTiming: {
+    prototype: PerformanceTiming;
+    new(): PerformanceTiming;
+};
+
+interface PerfWidgetExternal {
+    readonly activeNetworkRequestCount: number;
+    readonly averageFrameTime: number;
+    readonly averagePaintTime: number;
+    readonly extraInformationEnabled: boolean;
+    readonly independentRenderingEnabled: boolean;
+    readonly irDisablingContentString: string;
+    readonly irStatusAvailable: boolean;
+    readonly maxCpuSpeed: number;
+    readonly paintRequestsPerSecond: number;
+    readonly performanceCounter: number;
+    readonly performanceCounterFrequency: number;
+    addEventListener(eventType: string, callback: Function): void;
+    getMemoryUsage(): number;
+    getProcessCpuUsage(): number;
+    getRecentCpuUsage(last: number | null): any;
+    getRecentFrames(last: number | null): any;
+    getRecentMemoryUsage(last: number | null): any;
+    getRecentPaintRequests(last: number | null): any;
+    removeEventListener(eventType: string, callback: Function): void;
+    repositionWindow(x: number, y: number): void;
+    resizeWindow(width: number, height: number): void;
+}
+
+declare var PerfWidgetExternal: {
+    prototype: PerfWidgetExternal;
+    new(): PerfWidgetExternal;
+};
+
+interface PeriodicWave {
+}
+
+declare var PeriodicWave: {
+    prototype: PeriodicWave;
+    new(): PeriodicWave;
+};
+
+interface PermissionRequest extends DeferredPermissionRequest {
+    readonly state: MSWebViewPermissionState;
+    defer(): void;
+}
+
+declare var PermissionRequest: {
+    prototype: PermissionRequest;
+    new(): PermissionRequest;
+};
+
+interface PermissionRequestedEvent extends Event {
+    readonly permissionRequest: PermissionRequest;
+}
+
+declare var PermissionRequestedEvent: {
+    prototype: PermissionRequestedEvent;
+    new(): PermissionRequestedEvent;
+};
+
+interface Plugin {
+    readonly description: string;
+    readonly filename: string;
+    readonly length: number;
+    readonly name: string;
+    readonly version: string;
+    item(index: number): MimeType;
+    namedItem(type: string): MimeType;
+    [index: number]: MimeType;
+}
+
+declare var Plugin: {
+    prototype: Plugin;
+    new(): Plugin;
+};
+
+interface PluginArray {
+    readonly length: number;
+    item(index: number): Plugin;
+    namedItem(name: string): Plugin;
+    refresh(reload?: boolean): void;
+    [index: number]: Plugin;
+}
+
+declare var PluginArray: {
+    prototype: PluginArray;
+    new(): PluginArray;
+};
+
+interface PointerEvent extends MouseEvent {
+    readonly currentPoint: any;
+    readonly height: number;
+    readonly hwTimestamp: number;
+    readonly intermediatePoints: any;
+    readonly isPrimary: boolean;
+    readonly pointerId: number;
+    readonly pointerType: any;
+    readonly pressure: number;
+    readonly rotation: number;
+    readonly tiltX: number;
+    readonly tiltY: number;
+    readonly width: number;
+    getCurrentPoint(element: Element): void;
+    getIntermediatePoints(element: Element): void;
+    initPointerEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, ctrlKeyArg: boolean, altKeyArg: boolean, shiftKeyArg: boolean, metaKeyArg: boolean, buttonArg: number, relatedTargetArg: EventTarget, offsetXArg: number, offsetYArg: number, widthArg: number, heightArg: number, pressure: number, rotation: number, tiltX: number, tiltY: number, pointerIdArg: number, pointerType: any, hwTimestampArg: number, isPrimary: boolean): void;
+}
+
+declare var PointerEvent: {
+    prototype: PointerEvent;
+    new(typeArg: string, eventInitDict?: PointerEventInit): PointerEvent;
+};
+
+interface PopStateEvent extends Event {
+    readonly state: any;
+    initPopStateEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, stateArg: any): void;
+}
+
+declare var PopStateEvent: {
+    prototype: PopStateEvent;
+    new(typeArg: string, eventInitDict?: PopStateEventInit): PopStateEvent;
+};
+
+interface Position {
+    readonly coords: Coordinates;
+    readonly timestamp: number;
+}
+
+declare var Position: {
+    prototype: Position;
+    new(): Position;
+};
+
+interface PositionError {
+    readonly code: number;
+    readonly message: string;
+    toString(): string;
+    readonly PERMISSION_DENIED: number;
+    readonly POSITION_UNAVAILABLE: number;
+    readonly TIMEOUT: number;
+}
+
+declare var PositionError: {
+    prototype: PositionError;
+    new(): PositionError;
+    readonly PERMISSION_DENIED: number;
+    readonly POSITION_UNAVAILABLE: number;
+    readonly TIMEOUT: number;
+};
+
+interface ProcessingInstruction extends CharacterData {
+    readonly target: string;
+}
+
+declare var ProcessingInstruction: {
+    prototype: ProcessingInstruction;
+    new(): ProcessingInstruction;
+};
+
+interface ProgressEvent extends Event {
+    readonly lengthComputable: boolean;
+    readonly loaded: number;
+    readonly total: number;
+    initProgressEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, lengthComputableArg: boolean, loadedArg: number, totalArg: number): void;
+}
+
+declare var ProgressEvent: {
+    prototype: ProgressEvent;
+    new(type: string, eventInitDict?: ProgressEventInit): ProgressEvent;
+};
+
+interface PushManager {
+    getSubscription(): Promise<PushSubscription>;
+    permissionState(options?: PushSubscriptionOptionsInit): Promise<PushPermissionState>;
+    subscribe(options?: PushSubscriptionOptionsInit): Promise<PushSubscription>;
+}
+
+declare var PushManager: {
+    prototype: PushManager;
+    new(): PushManager;
+};
+
+interface PushSubscription {
+    readonly endpoint: USVString;
+    readonly options: PushSubscriptionOptions;
+    getKey(name: PushEncryptionKeyName): ArrayBuffer | null;
+    toJSON(): any;
+    unsubscribe(): Promise<boolean>;
+}
+
+declare var PushSubscription: {
+    prototype: PushSubscription;
+    new(): PushSubscription;
+};
+
+interface PushSubscriptionOptions {
+    readonly applicationServerKey: ArrayBuffer | null;
+    readonly userVisibleOnly: boolean;
+}
+
+declare var PushSubscriptionOptions: {
+    prototype: PushSubscriptionOptions;
+    new(): PushSubscriptionOptions;
+};
+
+interface Range {
+    readonly collapsed: boolean;
+    readonly commonAncestorContainer: Node;
+    readonly endContainer: Node;
+    readonly endOffset: number;
+    readonly startContainer: Node;
+    readonly startOffset: number;
+    cloneContents(): DocumentFragment;
+    cloneRange(): Range;
+    collapse(toStart: boolean): void;
+    compareBoundaryPoints(how: number, sourceRange: Range): number;
+    createContextualFragment(fragment: string): DocumentFragment;
+    deleteContents(): void;
+    detach(): void;
+    expand(Unit: ExpandGranularity): boolean;
+    extractContents(): DocumentFragment;
+    getBoundingClientRect(): ClientRect;
+    getClientRects(): ClientRectList;
+    insertNode(newNode: Node): void;
+    selectNode(refNode: Node): void;
+    selectNodeContents(refNode: Node): void;
+    setEnd(refNode: Node, offset: number): void;
+    setEndAfter(refNode: Node): void;
+    setEndBefore(refNode: Node): void;
+    setStart(refNode: Node, offset: number): void;
+    setStartAfter(refNode: Node): void;
+    setStartBefore(refNode: Node): void;
+    surroundContents(newParent: Node): void;
+    toString(): string;
+    readonly END_TO_END: number;
+    readonly END_TO_START: number;
+    readonly START_TO_END: number;
+    readonly START_TO_START: number;
+}
+
+declare var Range: {
+    prototype: Range;
+    new(): Range;
+    readonly END_TO_END: number;
+    readonly END_TO_START: number;
+    readonly START_TO_END: number;
+    readonly START_TO_START: number;
+};
+
+interface ReadableStream {
+    readonly locked: boolean;
+    cancel(): Promise<void>;
+    getReader(): ReadableStreamReader;
+}
+
+declare var ReadableStream: {
+    prototype: ReadableStream;
+    new(): ReadableStream;
+};
+
+interface ReadableStreamReader {
+    cancel(): Promise<void>;
+    read(): Promise<any>;
+    releaseLock(): void;
+}
+
+declare var ReadableStreamReader: {
+    prototype: ReadableStreamReader;
+    new(): ReadableStreamReader;
+};
+
+interface Request extends Object, Body {
+    readonly cache: RequestCache;
+    readonly credentials: RequestCredentials;
+    readonly destination: RequestDestination;
+    readonly headers: Headers;
+    readonly integrity: string;
+    readonly keepalive: boolean;
+    readonly method: string;
+    readonly mode: RequestMode;
+    readonly redirect: RequestRedirect;
+    readonly referrer: string;
+    readonly referrerPolicy: ReferrerPolicy;
+    readonly type: RequestType;
+    readonly url: string;
+    clone(): Request;
+}
+
+declare var Request: {
+    prototype: Request;
+    new(input: Request | string, init?: RequestInit): Request;
+};
+
+interface Response extends Object, Body {
+    readonly body: ReadableStream | null;
+    readonly headers: Headers;
+    readonly ok: boolean;
+    readonly status: number;
+    readonly statusText: string;
+    readonly type: ResponseType;
+    readonly url: string;
+    clone(): Response;
+}
+
+declare var Response: {
+    prototype: Response;
+    new(body?: any, init?: ResponseInit): Response;
+    error: () => Response;
+    redirect: (url: string, status?: number) => Response;
+};
+
+interface RTCDtlsTransportEventMap {
+    "dtlsstatechange": RTCDtlsTransportStateChangedEvent;
+    "error": Event;
+}
+
+interface RTCDtlsTransport extends RTCStatsProvider {
+    ondtlsstatechange: ((this: RTCDtlsTransport, ev: RTCDtlsTransportStateChangedEvent) => any) | null;
+    onerror: ((this: RTCDtlsTransport, ev: Event) => any) | null;
+    readonly state: RTCDtlsTransportState;
+    readonly transport: RTCIceTransport;
+    getLocalParameters(): RTCDtlsParameters;
+    getRemoteCertificates(): ArrayBuffer[];
+    getRemoteParameters(): RTCDtlsParameters | null;
+    start(remoteParameters: RTCDtlsParameters): void;
+    stop(): void;
+    addEventListener<K extends keyof RTCDtlsTransportEventMap>(type: K, listener: (this: RTCDtlsTransport, ev: RTCDtlsTransportEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var RTCDtlsTransport: {
+    prototype: RTCDtlsTransport;
+    new(transport: RTCIceTransport): RTCDtlsTransport;
+};
+
+interface RTCDtlsTransportStateChangedEvent extends Event {
+    readonly state: RTCDtlsTransportState;
+}
+
+declare var RTCDtlsTransportStateChangedEvent: {
+    prototype: RTCDtlsTransportStateChangedEvent;
+    new(): RTCDtlsTransportStateChangedEvent;
+};
+
+interface RTCDtmfSenderEventMap {
+    "tonechange": RTCDTMFToneChangeEvent;
+}
+
+interface RTCDtmfSender extends EventTarget {
+    readonly canInsertDTMF: boolean;
+    readonly duration: number;
+    readonly interToneGap: number;
+    ontonechange: (this: RTCDtmfSender, ev: RTCDTMFToneChangeEvent) => any;
+    readonly sender: RTCRtpSender;
+    readonly toneBuffer: string;
+    insertDTMF(tones: string, duration?: number, interToneGap?: number): void;
+    addEventListener<K extends keyof RTCDtmfSenderEventMap>(type: K, listener: (this: RTCDtmfSender, ev: RTCDtmfSenderEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var RTCDtmfSender: {
+    prototype: RTCDtmfSender;
+    new(sender: RTCRtpSender): RTCDtmfSender;
+};
+
+interface RTCDTMFToneChangeEvent extends Event {
+    readonly tone: string;
+}
+
+declare var RTCDTMFToneChangeEvent: {
+    prototype: RTCDTMFToneChangeEvent;
+    new(typeArg: string, eventInitDict: RTCDTMFToneChangeEventInit): RTCDTMFToneChangeEvent;
+};
+
+interface RTCIceCandidate {
+    candidate: string | null;
+    sdpMid: string | null;
+    sdpMLineIndex: number | null;
+    toJSON(): any;
+}
+
+declare var RTCIceCandidate: {
+    prototype: RTCIceCandidate;
+    new(candidateInitDict?: RTCIceCandidateInit): RTCIceCandidate;
+};
+
+interface RTCIceCandidatePairChangedEvent extends Event {
+    readonly pair: RTCIceCandidatePair;
+}
+
+declare var RTCIceCandidatePairChangedEvent: {
+    prototype: RTCIceCandidatePairChangedEvent;
+    new(): RTCIceCandidatePairChangedEvent;
+};
+
+interface RTCIceGathererEventMap {
+    "error": Event;
+    "localcandidate": RTCIceGathererEvent;
+}
+
+interface RTCIceGatherer extends RTCStatsProvider {
+    readonly component: RTCIceComponent;
+    onerror: ((this: RTCIceGatherer, ev: Event) => any) | null;
+    onlocalcandidate: ((this: RTCIceGatherer, ev: RTCIceGathererEvent) => any) | null;
+    createAssociatedGatherer(): RTCIceGatherer;
+    getLocalCandidates(): RTCIceCandidateDictionary[];
+    getLocalParameters(): RTCIceParameters;
+    addEventListener<K extends keyof RTCIceGathererEventMap>(type: K, listener: (this: RTCIceGatherer, ev: RTCIceGathererEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var RTCIceGatherer: {
+    prototype: RTCIceGatherer;
+    new(options: RTCIceGatherOptions): RTCIceGatherer;
+};
+
+interface RTCIceGathererEvent extends Event {
+    readonly candidate: RTCIceCandidateDictionary | RTCIceCandidateComplete;
+}
+
+declare var RTCIceGathererEvent: {
+    prototype: RTCIceGathererEvent;
+    new(): RTCIceGathererEvent;
+};
+
+interface RTCIceTransportEventMap {
+    "candidatepairchange": RTCIceCandidatePairChangedEvent;
+    "icestatechange": RTCIceTransportStateChangedEvent;
+}
+
+interface RTCIceTransport extends RTCStatsProvider {
+    readonly component: RTCIceComponent;
+    readonly iceGatherer: RTCIceGatherer | null;
+    oncandidatepairchange: ((this: RTCIceTransport, ev: RTCIceCandidatePairChangedEvent) => any) | null;
+    onicestatechange: ((this: RTCIceTransport, ev: RTCIceTransportStateChangedEvent) => any) | null;
+    readonly role: RTCIceRole;
+    readonly state: RTCIceTransportState;
+    addRemoteCandidate(remoteCandidate: RTCIceCandidateDictionary | RTCIceCandidateComplete): void;
+    createAssociatedTransport(): RTCIceTransport;
+    getNominatedCandidatePair(): RTCIceCandidatePair | null;
+    getRemoteCandidates(): RTCIceCandidateDictionary[];
+    getRemoteParameters(): RTCIceParameters | null;
+    setRemoteCandidates(remoteCandidates: RTCIceCandidateDictionary[]): void;
+    start(gatherer: RTCIceGatherer, remoteParameters: RTCIceParameters, role?: RTCIceRole): void;
+    stop(): void;
+    addEventListener<K extends keyof RTCIceTransportEventMap>(type: K, listener: (this: RTCIceTransport, ev: RTCIceTransportEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var RTCIceTransport: {
+    prototype: RTCIceTransport;
+    new(): RTCIceTransport;
+};
+
+interface RTCIceTransportStateChangedEvent extends Event {
+    readonly state: RTCIceTransportState;
+}
+
+declare var RTCIceTransportStateChangedEvent: {
+    prototype: RTCIceTransportStateChangedEvent;
+    new(): RTCIceTransportStateChangedEvent;
+};
+
+interface RTCPeerConnectionEventMap {
+    "addstream": MediaStreamEvent;
+    "icecandidate": RTCPeerConnectionIceEvent;
+    "iceconnectionstatechange": Event;
+    "icegatheringstatechange": Event;
+    "negotiationneeded": Event;
+    "removestream": MediaStreamEvent;
+    "signalingstatechange": Event;
+}
+
+interface RTCPeerConnection extends EventTarget {
+    readonly canTrickleIceCandidates: boolean | null;
+    readonly iceConnectionState: RTCIceConnectionState;
+    readonly iceGatheringState: RTCIceGatheringState;
+    readonly localDescription: RTCSessionDescription | null;
+    onaddstream: (this: RTCPeerConnection, ev: MediaStreamEvent) => any;
+    onicecandidate: (this: RTCPeerConnection, ev: RTCPeerConnectionIceEvent) => any;
+    oniceconnectionstatechange: (this: RTCPeerConnection, ev: Event) => any;
+    onicegatheringstatechange: (this: RTCPeerConnection, ev: Event) => any;
+    onnegotiationneeded: (this: RTCPeerConnection, ev: Event) => any;
+    onremovestream: (this: RTCPeerConnection, ev: MediaStreamEvent) => any;
+    onsignalingstatechange: (this: RTCPeerConnection, ev: Event) => any;
+    readonly remoteDescription: RTCSessionDescription | null;
+    readonly signalingState: RTCSignalingState;
+    addIceCandidate(candidate: RTCIceCandidate, successCallback?: VoidFunction, failureCallback?: RTCPeerConnectionErrorCallback): Promise<void>;
+    addStream(stream: MediaStream): void;
+    close(): void;
+    createAnswer(successCallback?: RTCSessionDescriptionCallback, failureCallback?: RTCPeerConnectionErrorCallback): Promise<RTCSessionDescription>;
+    createOffer(successCallback?: RTCSessionDescriptionCallback, failureCallback?: RTCPeerConnectionErrorCallback, options?: RTCOfferOptions): Promise<RTCSessionDescription>;
+    getConfiguration(): RTCConfiguration;
+    getLocalStreams(): MediaStream[];
+    getRemoteStreams(): MediaStream[];
+    getStats(selector: MediaStreamTrack | null, successCallback?: RTCStatsCallback, failureCallback?: RTCPeerConnectionErrorCallback): Promise<RTCStatsReport>;
+    getStreamById(streamId: string): MediaStream | null;
+    removeStream(stream: MediaStream): void;
+    setLocalDescription(description: RTCSessionDescription, successCallback?: VoidFunction, failureCallback?: RTCPeerConnectionErrorCallback): Promise<void>;
+    setRemoteDescription(description: RTCSessionDescription, successCallback?: VoidFunction, failureCallback?: RTCPeerConnectionErrorCallback): Promise<void>;
+    addEventListener<K extends keyof RTCPeerConnectionEventMap>(type: K, listener: (this: RTCPeerConnection, ev: RTCPeerConnectionEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var RTCPeerConnection: {
+    prototype: RTCPeerConnection;
+    new(configuration: RTCConfiguration): RTCPeerConnection;
+};
+
+interface RTCPeerConnectionIceEvent extends Event {
+    readonly candidate: RTCIceCandidate;
+}
+
+declare var RTCPeerConnectionIceEvent: {
+    prototype: RTCPeerConnectionIceEvent;
+    new(type: string, eventInitDict: RTCPeerConnectionIceEventInit): RTCPeerConnectionIceEvent;
+};
+
+interface RTCRtpReceiverEventMap {
+    "error": Event;
+}
+
+interface RTCRtpReceiver extends RTCStatsProvider {
+    onerror: ((this: RTCRtpReceiver, ev: Event) => any) | null;
+    readonly rtcpTransport: RTCDtlsTransport;
+    readonly track: MediaStreamTrack | null;
+    readonly transport: RTCDtlsTransport | RTCSrtpSdesTransport;
+    getContributingSources(): RTCRtpContributingSource[];
+    receive(parameters: RTCRtpParameters): void;
+    requestSendCSRC(csrc: number): void;
+    setTransport(transport: RTCDtlsTransport | RTCSrtpSdesTransport, rtcpTransport?: RTCDtlsTransport): void;
+    stop(): void;
+    addEventListener<K extends keyof RTCRtpReceiverEventMap>(type: K, listener: (this: RTCRtpReceiver, ev: RTCRtpReceiverEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var RTCRtpReceiver: {
+    prototype: RTCRtpReceiver;
+    new(transport: RTCDtlsTransport | RTCSrtpSdesTransport, kind: string, rtcpTransport?: RTCDtlsTransport): RTCRtpReceiver;
+    getCapabilities(kind?: string): RTCRtpCapabilities;
+};
+
+interface RTCRtpSenderEventMap {
+    "error": Event;
+    "ssrcconflict": RTCSsrcConflictEvent;
+}
+
+interface RTCRtpSender extends RTCStatsProvider {
+    onerror: ((this: RTCRtpSender, ev: Event) => any) | null;
+    onssrcconflict: ((this: RTCRtpSender, ev: RTCSsrcConflictEvent) => any) | null;
+    readonly rtcpTransport: RTCDtlsTransport;
+    readonly track: MediaStreamTrack;
+    readonly transport: RTCDtlsTransport | RTCSrtpSdesTransport;
+    send(parameters: RTCRtpParameters): void;
+    setTrack(track: MediaStreamTrack): void;
+    setTransport(transport: RTCDtlsTransport | RTCSrtpSdesTransport, rtcpTransport?: RTCDtlsTransport): void;
+    stop(): void;
+    addEventListener<K extends keyof RTCRtpSenderEventMap>(type: K, listener: (this: RTCRtpSender, ev: RTCRtpSenderEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var RTCRtpSender: {
+    prototype: RTCRtpSender;
+    new(track: MediaStreamTrack, transport: RTCDtlsTransport | RTCSrtpSdesTransport, rtcpTransport?: RTCDtlsTransport): RTCRtpSender;
+    getCapabilities(kind?: string): RTCRtpCapabilities;
+};
+
+interface RTCSessionDescription {
+    sdp: string | null;
+    type: RTCSdpType | null;
+    toJSON(): any;
+}
+
+declare var RTCSessionDescription: {
+    prototype: RTCSessionDescription;
+    new(descriptionInitDict?: RTCSessionDescriptionInit): RTCSessionDescription;
+};
+
+interface RTCSrtpSdesTransportEventMap {
+    "error": Event;
+}
+
+interface RTCSrtpSdesTransport extends EventTarget {
+    onerror: ((this: RTCSrtpSdesTransport, ev: Event) => any) | null;
+    readonly transport: RTCIceTransport;
+    addEventListener<K extends keyof RTCSrtpSdesTransportEventMap>(type: K, listener: (this: RTCSrtpSdesTransport, ev: RTCSrtpSdesTransportEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var RTCSrtpSdesTransport: {
+    prototype: RTCSrtpSdesTransport;
+    new(transport: RTCIceTransport, encryptParameters: RTCSrtpSdesParameters, decryptParameters: RTCSrtpSdesParameters): RTCSrtpSdesTransport;
+    getLocalParameters(): RTCSrtpSdesParameters[];
+};
+
+interface RTCSsrcConflictEvent extends Event {
+    readonly ssrc: number;
+}
+
+declare var RTCSsrcConflictEvent: {
+    prototype: RTCSsrcConflictEvent;
+    new(): RTCSsrcConflictEvent;
+};
+
+interface RTCStatsProvider extends EventTarget {
+    getStats(): Promise<RTCStatsReport>;
+    msGetStats(): Promise<RTCStatsReport>;
+}
+
+declare var RTCStatsProvider: {
+    prototype: RTCStatsProvider;
+    new(): RTCStatsProvider;
+};
+
+interface ScopedCredential {
+    readonly id: ArrayBuffer;
+    readonly type: ScopedCredentialType;
+}
+
+declare var ScopedCredential: {
+    prototype: ScopedCredential;
+    new(): ScopedCredential;
+};
+
+interface ScopedCredentialInfo {
+    readonly credential: ScopedCredential;
+    readonly publicKey: CryptoKey;
+}
+
+declare var ScopedCredentialInfo: {
+    prototype: ScopedCredentialInfo;
+    new(): ScopedCredentialInfo;
+};
+
+interface ScreenEventMap {
+    "MSOrientationChange": Event;
+}
+
+interface Screen extends EventTarget {
+    readonly availHeight: number;
+    readonly availWidth: number;
+    bufferDepth: number;
+    readonly colorDepth: number;
+    readonly deviceXDPI: number;
+    readonly deviceYDPI: number;
+    readonly fontSmoothingEnabled: boolean;
+    readonly height: number;
+    readonly logicalXDPI: number;
+    readonly logicalYDPI: number;
+    readonly msOrientation: string;
+    onmsorientationchange: (this: Screen, ev: Event) => any;
+    readonly pixelDepth: number;
+    readonly systemXDPI: number;
+    readonly systemYDPI: number;
+    readonly width: number;
+    msLockOrientation(orientations: string | string[]): boolean;
+    msUnlockOrientation(): void;
+    addEventListener<K extends keyof ScreenEventMap>(type: K, listener: (this: Screen, ev: ScreenEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var Screen: {
+    prototype: Screen;
+    new(): Screen;
+};
+
+interface ScriptNotifyEvent extends Event {
+    readonly callingUri: string;
+    readonly value: string;
+}
+
+declare var ScriptNotifyEvent: {
+    prototype: ScriptNotifyEvent;
+    new(): ScriptNotifyEvent;
+};
+
+interface ScriptProcessorNodeEventMap {
+    "audioprocess": AudioProcessingEvent;
+}
+
+interface ScriptProcessorNode extends AudioNode {
+    readonly bufferSize: number;
+    onaudioprocess: (this: ScriptProcessorNode, ev: AudioProcessingEvent) => any;
+    addEventListener<K extends keyof ScriptProcessorNodeEventMap>(type: K, listener: (this: ScriptProcessorNode, ev: ScriptProcessorNodeEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var ScriptProcessorNode: {
+    prototype: ScriptProcessorNode;
+    new(): ScriptProcessorNode;
+};
+
+interface Selection {
+    readonly anchorNode: Node;
+    readonly anchorOffset: number;
+    readonly baseNode: Node;
+    readonly baseOffset: number;
+    readonly extentNode: Node;
+    readonly extentOffset: number;
+    readonly focusNode: Node;
+    readonly focusOffset: number;
+    readonly isCollapsed: boolean;
+    readonly rangeCount: number;
+    readonly type: string;
+    addRange(range: Range): void;
+    collapse(parentNode: Node, offset: number): void;
+    collapseToEnd(): void;
+    collapseToStart(): void;
+    containsNode(node: Node, partlyContained: boolean): boolean;
+    deleteFromDocument(): void;
+    empty(): void;
+    extend(newNode: Node, offset: number): void;
+    getRangeAt(index: number): Range;
+    removeAllRanges(): void;
+    removeRange(range: Range): void;
+    selectAllChildren(parentNode: Node): void;
+    setBaseAndExtent(baseNode: Node, baseOffset: number, extentNode: Node, extentOffset: number): void;
+    setPosition(parentNode: Node, offset: number): void;
+    toString(): string;
+}
+
+declare var Selection: {
+    prototype: Selection;
+    new(): Selection;
+};
+
+interface ServiceWorkerEventMap extends AbstractWorkerEventMap {
+    "statechange": Event;
+}
+
+interface ServiceWorker extends EventTarget, AbstractWorker {
+    onstatechange: (this: ServiceWorker, ev: Event) => any;
+    readonly scriptURL: USVString;
+    readonly state: ServiceWorkerState;
+    postMessage(message: any, transfer?: any[]): void;
+    addEventListener<K extends keyof ServiceWorkerEventMap>(type: K, listener: (this: ServiceWorker, ev: ServiceWorkerEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var ServiceWorker: {
+    prototype: ServiceWorker;
+    new(): ServiceWorker;
+};
+
+interface ServiceWorkerContainerEventMap {
+    "controllerchange": Event;
+    "message": ServiceWorkerMessageEvent;
+}
+
+interface ServiceWorkerContainer extends EventTarget {
+    readonly controller: ServiceWorker | null;
+    oncontrollerchange: (this: ServiceWorkerContainer, ev: Event) => any;
+    onmessage: (this: ServiceWorkerContainer, ev: ServiceWorkerMessageEvent) => any;
+    readonly ready: Promise<ServiceWorkerRegistration>;
+    getRegistration(clientURL?: USVString): Promise<any>;
+    getRegistrations(): any;
+    register(scriptURL: USVString, options?: RegistrationOptions): Promise<ServiceWorkerRegistration>;
+    addEventListener<K extends keyof ServiceWorkerContainerEventMap>(type: K, listener: (this: ServiceWorkerContainer, ev: ServiceWorkerContainerEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var ServiceWorkerContainer: {
+    prototype: ServiceWorkerContainer;
+    new(): ServiceWorkerContainer;
+};
+
+interface ServiceWorkerMessageEvent extends Event {
+    readonly data: any;
+    readonly lastEventId: string;
+    readonly origin: string;
+    readonly ports: MessagePort[] | null;
+    readonly source: ServiceWorker | MessagePort | null;
+}
+
+declare var ServiceWorkerMessageEvent: {
+    prototype: ServiceWorkerMessageEvent;
+    new(type: string, eventInitDict?: ServiceWorkerMessageEventInit): ServiceWorkerMessageEvent;
+};
+
+interface ServiceWorkerRegistrationEventMap {
+    "updatefound": Event;
+}
+
+interface ServiceWorkerRegistration extends EventTarget {
+    readonly active: ServiceWorker | null;
+    readonly installing: ServiceWorker | null;
+    onupdatefound: (this: ServiceWorkerRegistration, ev: Event) => any;
+    readonly pushManager: PushManager;
+    readonly scope: USVString;
+    readonly sync: SyncManager;
+    readonly waiting: ServiceWorker | null;
+    getNotifications(filter?: GetNotificationOptions): any;
+    showNotification(title: string, options?: NotificationOptions): Promise<void>;
+    unregister(): Promise<boolean>;
+    update(): Promise<void>;
+    addEventListener<K extends keyof ServiceWorkerRegistrationEventMap>(type: K, listener: (this: ServiceWorkerRegistration, ev: ServiceWorkerRegistrationEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var ServiceWorkerRegistration: {
+    prototype: ServiceWorkerRegistration;
+    new(): ServiceWorkerRegistration;
+};
+
+interface SourceBuffer extends EventTarget {
+    appendWindowEnd: number;
+    appendWindowStart: number;
+    readonly audioTracks: AudioTrackList;
+    readonly buffered: TimeRanges;
+    mode: AppendMode;
+    timestampOffset: number;
+    readonly updating: boolean;
+    readonly videoTracks: VideoTrackList;
+    abort(): void;
+    appendBuffer(data: ArrayBuffer | ArrayBufferView): void;
+    appendStream(stream: MSStream, maxSize?: number): void;
+    remove(start: number, end: number): void;
+}
+
+declare var SourceBuffer: {
+    prototype: SourceBuffer;
+    new(): SourceBuffer;
+};
+
+interface SourceBufferList extends EventTarget {
+    readonly length: number;
+    item(index: number): SourceBuffer;
+    [index: number]: SourceBuffer;
+}
+
+declare var SourceBufferList: {
+    prototype: SourceBufferList;
+    new(): SourceBufferList;
+};
+
+interface SpeechSynthesisEventMap {
+    "voiceschanged": Event;
+}
+
+interface SpeechSynthesis extends EventTarget {
+    onvoiceschanged: (this: SpeechSynthesis, ev: Event) => any;
+    readonly paused: boolean;
+    readonly pending: boolean;
+    readonly speaking: boolean;
+    cancel(): void;
+    getVoices(): SpeechSynthesisVoice[];
+    pause(): void;
+    resume(): void;
+    speak(utterance: SpeechSynthesisUtterance): void;
+    addEventListener<K extends keyof SpeechSynthesisEventMap>(type: K, listener: (this: SpeechSynthesis, ev: SpeechSynthesisEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SpeechSynthesis: {
+    prototype: SpeechSynthesis;
+    new(): SpeechSynthesis;
+};
+
+interface SpeechSynthesisEvent extends Event {
+    readonly charIndex: number;
+    readonly elapsedTime: number;
+    readonly name: string;
+    readonly utterance: SpeechSynthesisUtterance | null;
+}
+
+declare var SpeechSynthesisEvent: {
+    prototype: SpeechSynthesisEvent;
+    new(type: string, eventInitDict?: SpeechSynthesisEventInit): SpeechSynthesisEvent;
+};
+
+interface SpeechSynthesisUtteranceEventMap {
+    "boundary": Event;
+    "end": Event;
+    "error": Event;
+    "mark": Event;
+    "pause": Event;
+    "resume": Event;
+    "start": Event;
+}
+
+interface SpeechSynthesisUtterance extends EventTarget {
+    lang: string;
+    onboundary: (this: SpeechSynthesisUtterance, ev: Event) => any;
+    onend: (this: SpeechSynthesisUtterance, ev: Event) => any;
+    onerror: (this: SpeechSynthesisUtterance, ev: Event) => any;
+    onmark: (this: SpeechSynthesisUtterance, ev: Event) => any;
+    onpause: (this: SpeechSynthesisUtterance, ev: Event) => any;
+    onresume: (this: SpeechSynthesisUtterance, ev: Event) => any;
+    onstart: (this: SpeechSynthesisUtterance, ev: Event) => any;
+    pitch: number;
+    rate: number;
+    text: string;
+    voice: SpeechSynthesisVoice;
+    volume: number;
+    addEventListener<K extends keyof SpeechSynthesisUtteranceEventMap>(type: K, listener: (this: SpeechSynthesisUtterance, ev: SpeechSynthesisUtteranceEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SpeechSynthesisUtterance: {
+    prototype: SpeechSynthesisUtterance;
+    new(text?: string): SpeechSynthesisUtterance;
+};
+
+interface SpeechSynthesisVoice {
+    readonly default: boolean;
+    readonly lang: string;
+    readonly localService: boolean;
+    readonly name: string;
+    readonly voiceURI: string;
+}
+
+declare var SpeechSynthesisVoice: {
+    prototype: SpeechSynthesisVoice;
+    new(): SpeechSynthesisVoice;
+};
+
+interface StereoPannerNode extends AudioNode {
+    readonly pan: AudioParam;
+}
+
+declare var StereoPannerNode: {
+    prototype: StereoPannerNode;
+    new(): StereoPannerNode;
+};
+
+interface Storage {
+    readonly length: number;
+    clear(): void;
+    getItem(key: string): string | null;
+    key(index: number): string | null;
+    removeItem(key: string): void;
+    setItem(key: string, data: string): void;
+    [key: string]: any;
+    [index: number]: string;
+}
+
+declare var Storage: {
+    prototype: Storage;
+    new(): Storage;
+};
+
+interface StorageEvent extends Event {
+    readonly url: string;
+    key?: string;
+    oldValue?: string;
+    newValue?: string;
+    storageArea?: Storage;
+}
+
+declare var StorageEvent: {
+    prototype: StorageEvent;
+    new (type: string, eventInitDict?: StorageEventInit): StorageEvent;
+};
+
+interface StyleMedia {
+    readonly type: string;
+    matchMedium(mediaquery: string): boolean;
+}
+
+declare var StyleMedia: {
+    prototype: StyleMedia;
+    new(): StyleMedia;
+};
+
+interface StyleSheet {
+    disabled: boolean;
+    readonly href: string;
+    readonly media: MediaList;
+    readonly ownerNode: Node;
+    readonly parentStyleSheet: StyleSheet;
+    readonly title: string;
+    readonly type: string;
+}
+
+declare var StyleSheet: {
+    prototype: StyleSheet;
+    new(): StyleSheet;
+};
+
+interface StyleSheetList {
+    readonly length: number;
+    item(index?: number): StyleSheet;
+    [index: number]: StyleSheet;
+}
+
+declare var StyleSheetList: {
+    prototype: StyleSheetList;
+    new(): StyleSheetList;
+};
+
+interface StyleSheetPageList {
+    readonly length: number;
+    item(index: number): CSSPageRule;
+    [index: number]: CSSPageRule;
+}
+
+declare var StyleSheetPageList: {
+    prototype: StyleSheetPageList;
+    new(): StyleSheetPageList;
+};
+
+interface SubtleCrypto {
+    decrypt(algorithm: string | RsaOaepParams | AesCtrParams | AesCbcParams | AesCmacParams | AesGcmParams | AesCfbParams, key: CryptoKey, data: BufferSource): PromiseLike<ArrayBuffer>;
+    deriveBits(algorithm: string | EcdhKeyDeriveParams | DhKeyDeriveParams | ConcatParams | HkdfCtrParams | Pbkdf2Params, baseKey: CryptoKey, length: number): PromiseLike<ArrayBuffer>;
+    deriveKey(algorithm: string | EcdhKeyDeriveParams | DhKeyDeriveParams | ConcatParams | HkdfCtrParams | Pbkdf2Params, baseKey: CryptoKey, derivedKeyType: string | AesDerivedKeyParams | HmacImportParams | ConcatParams | HkdfCtrParams | Pbkdf2Params, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
+    digest(algorithm: AlgorithmIdentifier, data: BufferSource): PromiseLike<ArrayBuffer>;
+    encrypt(algorithm: string | RsaOaepParams | AesCtrParams | AesCbcParams | AesCmacParams | AesGcmParams | AesCfbParams, key: CryptoKey, data: BufferSource): PromiseLike<ArrayBuffer>;
+    exportKey(format: "jwk", key: CryptoKey): PromiseLike<JsonWebKey>;
+    exportKey(format: "raw" | "pkcs8" | "spki", key: CryptoKey): PromiseLike<ArrayBuffer>;
+    exportKey(format: string, key: CryptoKey): PromiseLike<JsonWebKey | ArrayBuffer>;
+    generateKey(algorithm: string, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKeyPair | CryptoKey>;
+    generateKey(algorithm: RsaHashedKeyGenParams | EcKeyGenParams | DhKeyGenParams, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKeyPair>;
+    generateKey(algorithm: AesKeyGenParams | HmacKeyGenParams | Pbkdf2Params, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
+    importKey(format: "jwk", keyData: JsonWebKey, algorithm: string | RsaHashedImportParams | EcKeyImportParams | HmacImportParams | DhImportKeyParams, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
+    importKey(format: "raw" | "pkcs8" | "spki", keyData: BufferSource, algorithm: string | RsaHashedImportParams | EcKeyImportParams | HmacImportParams | DhImportKeyParams, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
+    importKey(format: string, keyData: JsonWebKey | BufferSource, algorithm: string | RsaHashedImportParams | EcKeyImportParams | HmacImportParams | DhImportKeyParams, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
+    sign(algorithm: string | RsaPssParams | EcdsaParams | AesCmacParams, key: CryptoKey, data: BufferSource): PromiseLike<ArrayBuffer>;
+    unwrapKey(format: string, wrappedKey: BufferSource, unwrappingKey: CryptoKey, unwrapAlgorithm: AlgorithmIdentifier, unwrappedKeyAlgorithm: AlgorithmIdentifier, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
+    verify(algorithm: string | RsaPssParams | EcdsaParams | AesCmacParams, key: CryptoKey, signature: BufferSource, data: BufferSource): PromiseLike<boolean>;
+    wrapKey(format: string, key: CryptoKey, wrappingKey: CryptoKey, wrapAlgorithm: AlgorithmIdentifier): PromiseLike<ArrayBuffer>;
+}
+
+declare var SubtleCrypto: {
+    prototype: SubtleCrypto;
+    new(): SubtleCrypto;
+};
+
+interface SVGAElement extends SVGGraphicsElement, SVGURIReference {
+    readonly target: SVGAnimatedString;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGAElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGAElement: {
+    prototype: SVGAElement;
+    new(): SVGAElement;
+};
+
+interface SVGAngle {
+    readonly unitType: number;
+    value: number;
+    valueAsString: string;
+    valueInSpecifiedUnits: number;
+    convertToSpecifiedUnits(unitType: number): void;
+    newValueSpecifiedUnits(unitType: number, valueInSpecifiedUnits: number): void;
+    readonly SVG_ANGLETYPE_DEG: number;
+    readonly SVG_ANGLETYPE_GRAD: number;
+    readonly SVG_ANGLETYPE_RAD: number;
+    readonly SVG_ANGLETYPE_UNKNOWN: number;
+    readonly SVG_ANGLETYPE_UNSPECIFIED: number;
+}
+
+declare var SVGAngle: {
+    prototype: SVGAngle;
+    new(): SVGAngle;
+    readonly SVG_ANGLETYPE_DEG: number;
+    readonly SVG_ANGLETYPE_GRAD: number;
+    readonly SVG_ANGLETYPE_RAD: number;
+    readonly SVG_ANGLETYPE_UNKNOWN: number;
+    readonly SVG_ANGLETYPE_UNSPECIFIED: number;
+};
+
+interface SVGAnimatedAngle {
+    readonly animVal: SVGAngle;
+    readonly baseVal: SVGAngle;
+}
+
+declare var SVGAnimatedAngle: {
+    prototype: SVGAnimatedAngle;
+    new(): SVGAnimatedAngle;
+};
+
+interface SVGAnimatedBoolean {
+    readonly animVal: boolean;
+    baseVal: boolean;
+}
+
+declare var SVGAnimatedBoolean: {
+    prototype: SVGAnimatedBoolean;
+    new(): SVGAnimatedBoolean;
+};
+
+interface SVGAnimatedEnumeration {
+    readonly animVal: number;
+    baseVal: number;
+}
+
+declare var SVGAnimatedEnumeration: {
+    prototype: SVGAnimatedEnumeration;
+    new(): SVGAnimatedEnumeration;
+};
+
+interface SVGAnimatedInteger {
+    readonly animVal: number;
+    baseVal: number;
+}
+
+declare var SVGAnimatedInteger: {
+    prototype: SVGAnimatedInteger;
+    new(): SVGAnimatedInteger;
+};
+
+interface SVGAnimatedLength {
+    readonly animVal: SVGLength;
+    readonly baseVal: SVGLength;
+}
+
+declare var SVGAnimatedLength: {
+    prototype: SVGAnimatedLength;
+    new(): SVGAnimatedLength;
+};
+
+interface SVGAnimatedLengthList {
+    readonly animVal: SVGLengthList;
+    readonly baseVal: SVGLengthList;
+}
+
+declare var SVGAnimatedLengthList: {
+    prototype: SVGAnimatedLengthList;
+    new(): SVGAnimatedLengthList;
+};
+
+interface SVGAnimatedNumber {
+    readonly animVal: number;
+    baseVal: number;
+}
+
+declare var SVGAnimatedNumber: {
+    prototype: SVGAnimatedNumber;
+    new(): SVGAnimatedNumber;
+};
+
+interface SVGAnimatedNumberList {
+    readonly animVal: SVGNumberList;
+    readonly baseVal: SVGNumberList;
+}
+
+declare var SVGAnimatedNumberList: {
+    prototype: SVGAnimatedNumberList;
+    new(): SVGAnimatedNumberList;
+};
+
+interface SVGAnimatedPreserveAspectRatio {
+    readonly animVal: SVGPreserveAspectRatio;
+    readonly baseVal: SVGPreserveAspectRatio;
+}
+
+declare var SVGAnimatedPreserveAspectRatio: {
+    prototype: SVGAnimatedPreserveAspectRatio;
+    new(): SVGAnimatedPreserveAspectRatio;
+};
+
+interface SVGAnimatedRect {
+    readonly animVal: SVGRect;
+    readonly baseVal: SVGRect;
+}
+
+declare var SVGAnimatedRect: {
+    prototype: SVGAnimatedRect;
+    new(): SVGAnimatedRect;
+};
+
+interface SVGAnimatedString {
+    readonly animVal: string;
+    baseVal: string;
+}
+
+declare var SVGAnimatedString: {
+    prototype: SVGAnimatedString;
+    new(): SVGAnimatedString;
+};
+
+interface SVGAnimatedTransformList {
+    readonly animVal: SVGTransformList;
+    readonly baseVal: SVGTransformList;
+}
+
+declare var SVGAnimatedTransformList: {
+    prototype: SVGAnimatedTransformList;
+    new(): SVGAnimatedTransformList;
+};
+
+interface SVGCircleElement extends SVGGraphicsElement {
+    readonly cx: SVGAnimatedLength;
+    readonly cy: SVGAnimatedLength;
+    readonly r: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGCircleElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGCircleElement: {
+    prototype: SVGCircleElement;
+    new(): SVGCircleElement;
+};
+
+interface SVGClipPathElement extends SVGGraphicsElement, SVGUnitTypes {
+    readonly clipPathUnits: SVGAnimatedEnumeration;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGClipPathElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGClipPathElement: {
+    prototype: SVGClipPathElement;
+    new(): SVGClipPathElement;
+};
+
+interface SVGComponentTransferFunctionElement extends SVGElement {
+    readonly amplitude: SVGAnimatedNumber;
+    readonly exponent: SVGAnimatedNumber;
+    readonly intercept: SVGAnimatedNumber;
+    readonly offset: SVGAnimatedNumber;
+    readonly slope: SVGAnimatedNumber;
+    readonly tableValues: SVGAnimatedNumberList;
+    readonly type: SVGAnimatedEnumeration;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_DISCRETE: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_GAMMA: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_IDENTITY: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_LINEAR: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_TABLE: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGComponentTransferFunctionElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGComponentTransferFunctionElement: {
+    prototype: SVGComponentTransferFunctionElement;
+    new(): SVGComponentTransferFunctionElement;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_DISCRETE: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_GAMMA: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_IDENTITY: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_LINEAR: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_TABLE: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_UNKNOWN: number;
+};
+
+interface SVGDefsElement extends SVGGraphicsElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGDefsElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGDefsElement: {
+    prototype: SVGDefsElement;
+    new(): SVGDefsElement;
+};
+
+interface SVGDescElement extends SVGElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGDescElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGDescElement: {
+    prototype: SVGDescElement;
+    new(): SVGDescElement;
+};
+
+interface SVGElementEventMap extends ElementEventMap {
+    "click": MouseEvent;
+    "dblclick": MouseEvent;
+    "focusin": FocusEvent;
+    "focusout": FocusEvent;
+    "load": Event;
+    "mousedown": MouseEvent;
+    "mousemove": MouseEvent;
+    "mouseout": MouseEvent;
+    "mouseover": MouseEvent;
+    "mouseup": MouseEvent;
+}
+
+interface SVGElement extends Element {
+    className: any;
+    onclick: (this: SVGElement, ev: MouseEvent) => any;
+    ondblclick: (this: SVGElement, ev: MouseEvent) => any;
+    onfocusin: (this: SVGElement, ev: FocusEvent) => any;
+    onfocusout: (this: SVGElement, ev: FocusEvent) => any;
+    onload: (this: SVGElement, ev: Event) => any;
+    onmousedown: (this: SVGElement, ev: MouseEvent) => any;
+    onmousemove: (this: SVGElement, ev: MouseEvent) => any;
+    onmouseout: (this: SVGElement, ev: MouseEvent) => any;
+    onmouseover: (this: SVGElement, ev: MouseEvent) => any;
+    onmouseup: (this: SVGElement, ev: MouseEvent) => any;
+    readonly ownerSVGElement: SVGSVGElement;
+    readonly style: CSSStyleDeclaration;
+    readonly viewportElement: SVGElement;
+    xmlbase: string;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGElement: {
+    prototype: SVGElement;
+    new(): SVGElement;
+};
+
+interface SVGElementInstance extends EventTarget {
+    readonly childNodes: SVGElementInstanceList;
+    readonly correspondingElement: SVGElement;
+    readonly correspondingUseElement: SVGUseElement;
+    readonly firstChild: SVGElementInstance;
+    readonly lastChild: SVGElementInstance;
+    readonly nextSibling: SVGElementInstance;
+    readonly parentNode: SVGElementInstance;
+    readonly previousSibling: SVGElementInstance;
+}
+
+declare var SVGElementInstance: {
+    prototype: SVGElementInstance;
+    new(): SVGElementInstance;
+};
+
+interface SVGElementInstanceList {
+    readonly length: number;
+    item(index: number): SVGElementInstance;
+}
+
+declare var SVGElementInstanceList: {
+    prototype: SVGElementInstanceList;
+    new(): SVGElementInstanceList;
+};
+
+interface SVGEllipseElement extends SVGGraphicsElement {
+    readonly cx: SVGAnimatedLength;
+    readonly cy: SVGAnimatedLength;
+    readonly rx: SVGAnimatedLength;
+    readonly ry: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGEllipseElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGEllipseElement: {
+    prototype: SVGEllipseElement;
+    new(): SVGEllipseElement;
+};
+
+interface SVGFEBlendElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    readonly in2: SVGAnimatedString;
+    readonly mode: SVGAnimatedEnumeration;
+    readonly SVG_FEBLEND_MODE_COLOR: number;
+    readonly SVG_FEBLEND_MODE_COLOR_BURN: number;
+    readonly SVG_FEBLEND_MODE_COLOR_DODGE: number;
+    readonly SVG_FEBLEND_MODE_DARKEN: number;
+    readonly SVG_FEBLEND_MODE_DIFFERENCE: number;
+    readonly SVG_FEBLEND_MODE_EXCLUSION: number;
+    readonly SVG_FEBLEND_MODE_HARD_LIGHT: number;
+    readonly SVG_FEBLEND_MODE_HUE: number;
+    readonly SVG_FEBLEND_MODE_LIGHTEN: number;
+    readonly SVG_FEBLEND_MODE_LUMINOSITY: number;
+    readonly SVG_FEBLEND_MODE_MULTIPLY: number;
+    readonly SVG_FEBLEND_MODE_NORMAL: number;
+    readonly SVG_FEBLEND_MODE_OVERLAY: number;
+    readonly SVG_FEBLEND_MODE_SATURATION: number;
+    readonly SVG_FEBLEND_MODE_SCREEN: number;
+    readonly SVG_FEBLEND_MODE_SOFT_LIGHT: number;
+    readonly SVG_FEBLEND_MODE_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEBlendElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEBlendElement: {
+    prototype: SVGFEBlendElement;
+    new(): SVGFEBlendElement;
+    readonly SVG_FEBLEND_MODE_COLOR: number;
+    readonly SVG_FEBLEND_MODE_COLOR_BURN: number;
+    readonly SVG_FEBLEND_MODE_COLOR_DODGE: number;
+    readonly SVG_FEBLEND_MODE_DARKEN: number;
+    readonly SVG_FEBLEND_MODE_DIFFERENCE: number;
+    readonly SVG_FEBLEND_MODE_EXCLUSION: number;
+    readonly SVG_FEBLEND_MODE_HARD_LIGHT: number;
+    readonly SVG_FEBLEND_MODE_HUE: number;
+    readonly SVG_FEBLEND_MODE_LIGHTEN: number;
+    readonly SVG_FEBLEND_MODE_LUMINOSITY: number;
+    readonly SVG_FEBLEND_MODE_MULTIPLY: number;
+    readonly SVG_FEBLEND_MODE_NORMAL: number;
+    readonly SVG_FEBLEND_MODE_OVERLAY: number;
+    readonly SVG_FEBLEND_MODE_SATURATION: number;
+    readonly SVG_FEBLEND_MODE_SCREEN: number;
+    readonly SVG_FEBLEND_MODE_SOFT_LIGHT: number;
+    readonly SVG_FEBLEND_MODE_UNKNOWN: number;
+};
+
+interface SVGFEColorMatrixElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    readonly type: SVGAnimatedEnumeration;
+    readonly values: SVGAnimatedNumberList;
+    readonly SVG_FECOLORMATRIX_TYPE_HUEROTATE: number;
+    readonly SVG_FECOLORMATRIX_TYPE_LUMINANCETOALPHA: number;
+    readonly SVG_FECOLORMATRIX_TYPE_MATRIX: number;
+    readonly SVG_FECOLORMATRIX_TYPE_SATURATE: number;
+    readonly SVG_FECOLORMATRIX_TYPE_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEColorMatrixElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEColorMatrixElement: {
+    prototype: SVGFEColorMatrixElement;
+    new(): SVGFEColorMatrixElement;
+    readonly SVG_FECOLORMATRIX_TYPE_HUEROTATE: number;
+    readonly SVG_FECOLORMATRIX_TYPE_LUMINANCETOALPHA: number;
+    readonly SVG_FECOLORMATRIX_TYPE_MATRIX: number;
+    readonly SVG_FECOLORMATRIX_TYPE_SATURATE: number;
+    readonly SVG_FECOLORMATRIX_TYPE_UNKNOWN: number;
+};
+
+interface SVGFEComponentTransferElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEComponentTransferElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEComponentTransferElement: {
+    prototype: SVGFEComponentTransferElement;
+    new(): SVGFEComponentTransferElement;
+};
+
+interface SVGFECompositeElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    readonly in2: SVGAnimatedString;
+    readonly k1: SVGAnimatedNumber;
+    readonly k2: SVGAnimatedNumber;
+    readonly k3: SVGAnimatedNumber;
+    readonly k4: SVGAnimatedNumber;
+    readonly operator: SVGAnimatedEnumeration;
+    readonly SVG_FECOMPOSITE_OPERATOR_ARITHMETIC: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_ATOP: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_IN: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_OUT: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_OVER: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_UNKNOWN: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_XOR: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFECompositeElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFECompositeElement: {
+    prototype: SVGFECompositeElement;
+    new(): SVGFECompositeElement;
+    readonly SVG_FECOMPOSITE_OPERATOR_ARITHMETIC: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_ATOP: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_IN: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_OUT: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_OVER: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_UNKNOWN: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_XOR: number;
+};
+
+interface SVGFEConvolveMatrixElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly bias: SVGAnimatedNumber;
+    readonly divisor: SVGAnimatedNumber;
+    readonly edgeMode: SVGAnimatedEnumeration;
+    readonly in1: SVGAnimatedString;
+    readonly kernelMatrix: SVGAnimatedNumberList;
+    readonly kernelUnitLengthX: SVGAnimatedNumber;
+    readonly kernelUnitLengthY: SVGAnimatedNumber;
+    readonly orderX: SVGAnimatedInteger;
+    readonly orderY: SVGAnimatedInteger;
+    readonly preserveAlpha: SVGAnimatedBoolean;
+    readonly targetX: SVGAnimatedInteger;
+    readonly targetY: SVGAnimatedInteger;
+    readonly SVG_EDGEMODE_DUPLICATE: number;
+    readonly SVG_EDGEMODE_NONE: number;
+    readonly SVG_EDGEMODE_UNKNOWN: number;
+    readonly SVG_EDGEMODE_WRAP: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEConvolveMatrixElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEConvolveMatrixElement: {
+    prototype: SVGFEConvolveMatrixElement;
+    new(): SVGFEConvolveMatrixElement;
+    readonly SVG_EDGEMODE_DUPLICATE: number;
+    readonly SVG_EDGEMODE_NONE: number;
+    readonly SVG_EDGEMODE_UNKNOWN: number;
+    readonly SVG_EDGEMODE_WRAP: number;
+};
+
+interface SVGFEDiffuseLightingElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly diffuseConstant: SVGAnimatedNumber;
+    readonly in1: SVGAnimatedString;
+    readonly kernelUnitLengthX: SVGAnimatedNumber;
+    readonly kernelUnitLengthY: SVGAnimatedNumber;
+    readonly surfaceScale: SVGAnimatedNumber;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEDiffuseLightingElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEDiffuseLightingElement: {
+    prototype: SVGFEDiffuseLightingElement;
+    new(): SVGFEDiffuseLightingElement;
+};
+
+interface SVGFEDisplacementMapElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    readonly in2: SVGAnimatedString;
+    readonly scale: SVGAnimatedNumber;
+    readonly xChannelSelector: SVGAnimatedEnumeration;
+    readonly yChannelSelector: SVGAnimatedEnumeration;
+    readonly SVG_CHANNEL_A: number;
+    readonly SVG_CHANNEL_B: number;
+    readonly SVG_CHANNEL_G: number;
+    readonly SVG_CHANNEL_R: number;
+    readonly SVG_CHANNEL_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEDisplacementMapElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEDisplacementMapElement: {
+    prototype: SVGFEDisplacementMapElement;
+    new(): SVGFEDisplacementMapElement;
+    readonly SVG_CHANNEL_A: number;
+    readonly SVG_CHANNEL_B: number;
+    readonly SVG_CHANNEL_G: number;
+    readonly SVG_CHANNEL_R: number;
+    readonly SVG_CHANNEL_UNKNOWN: number;
+};
+
+interface SVGFEDistantLightElement extends SVGElement {
+    readonly azimuth: SVGAnimatedNumber;
+    readonly elevation: SVGAnimatedNumber;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEDistantLightElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEDistantLightElement: {
+    prototype: SVGFEDistantLightElement;
+    new(): SVGFEDistantLightElement;
+};
+
+interface SVGFEFloodElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEFloodElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEFloodElement: {
+    prototype: SVGFEFloodElement;
+    new(): SVGFEFloodElement;
+};
+
+interface SVGFEFuncAElement extends SVGComponentTransferFunctionElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEFuncAElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEFuncAElement: {
+    prototype: SVGFEFuncAElement;
+    new(): SVGFEFuncAElement;
+};
+
+interface SVGFEFuncBElement extends SVGComponentTransferFunctionElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEFuncBElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEFuncBElement: {
+    prototype: SVGFEFuncBElement;
+    new(): SVGFEFuncBElement;
+};
+
+interface SVGFEFuncGElement extends SVGComponentTransferFunctionElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEFuncGElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEFuncGElement: {
+    prototype: SVGFEFuncGElement;
+    new(): SVGFEFuncGElement;
+};
+
+interface SVGFEFuncRElement extends SVGComponentTransferFunctionElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEFuncRElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEFuncRElement: {
+    prototype: SVGFEFuncRElement;
+    new(): SVGFEFuncRElement;
+};
+
+interface SVGFEGaussianBlurElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    readonly stdDeviationX: SVGAnimatedNumber;
+    readonly stdDeviationY: SVGAnimatedNumber;
+    setStdDeviation(stdDeviationX: number, stdDeviationY: number): void;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEGaussianBlurElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEGaussianBlurElement: {
+    prototype: SVGFEGaussianBlurElement;
+    new(): SVGFEGaussianBlurElement;
+};
+
+interface SVGFEImageElement extends SVGElement, SVGFilterPrimitiveStandardAttributes, SVGURIReference {
+    readonly preserveAspectRatio: SVGAnimatedPreserveAspectRatio;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEImageElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEImageElement: {
+    prototype: SVGFEImageElement;
+    new(): SVGFEImageElement;
+};
+
+interface SVGFEMergeElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEMergeElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEMergeElement: {
+    prototype: SVGFEMergeElement;
+    new(): SVGFEMergeElement;
+};
+
+interface SVGFEMergeNodeElement extends SVGElement {
+    readonly in1: SVGAnimatedString;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEMergeNodeElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEMergeNodeElement: {
+    prototype: SVGFEMergeNodeElement;
+    new(): SVGFEMergeNodeElement;
+};
+
+interface SVGFEMorphologyElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    readonly operator: SVGAnimatedEnumeration;
+    readonly radiusX: SVGAnimatedNumber;
+    readonly radiusY: SVGAnimatedNumber;
+    readonly SVG_MORPHOLOGY_OPERATOR_DILATE: number;
+    readonly SVG_MORPHOLOGY_OPERATOR_ERODE: number;
+    readonly SVG_MORPHOLOGY_OPERATOR_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEMorphologyElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEMorphologyElement: {
+    prototype: SVGFEMorphologyElement;
+    new(): SVGFEMorphologyElement;
+    readonly SVG_MORPHOLOGY_OPERATOR_DILATE: number;
+    readonly SVG_MORPHOLOGY_OPERATOR_ERODE: number;
+    readonly SVG_MORPHOLOGY_OPERATOR_UNKNOWN: number;
+};
+
+interface SVGFEOffsetElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly dx: SVGAnimatedNumber;
+    readonly dy: SVGAnimatedNumber;
+    readonly in1: SVGAnimatedString;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEOffsetElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEOffsetElement: {
+    prototype: SVGFEOffsetElement;
+    new(): SVGFEOffsetElement;
+};
+
+interface SVGFEPointLightElement extends SVGElement {
+    readonly x: SVGAnimatedNumber;
+    readonly y: SVGAnimatedNumber;
+    readonly z: SVGAnimatedNumber;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEPointLightElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEPointLightElement: {
+    prototype: SVGFEPointLightElement;
+    new(): SVGFEPointLightElement;
+};
+
+interface SVGFESpecularLightingElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    readonly kernelUnitLengthX: SVGAnimatedNumber;
+    readonly kernelUnitLengthY: SVGAnimatedNumber;
+    readonly specularConstant: SVGAnimatedNumber;
+    readonly specularExponent: SVGAnimatedNumber;
+    readonly surfaceScale: SVGAnimatedNumber;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFESpecularLightingElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFESpecularLightingElement: {
+    prototype: SVGFESpecularLightingElement;
+    new(): SVGFESpecularLightingElement;
+};
+
+interface SVGFESpotLightElement extends SVGElement {
+    readonly limitingConeAngle: SVGAnimatedNumber;
+    readonly pointsAtX: SVGAnimatedNumber;
+    readonly pointsAtY: SVGAnimatedNumber;
+    readonly pointsAtZ: SVGAnimatedNumber;
+    readonly specularExponent: SVGAnimatedNumber;
+    readonly x: SVGAnimatedNumber;
+    readonly y: SVGAnimatedNumber;
+    readonly z: SVGAnimatedNumber;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFESpotLightElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFESpotLightElement: {
+    prototype: SVGFESpotLightElement;
+    new(): SVGFESpotLightElement;
+};
+
+interface SVGFETileElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFETileElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFETileElement: {
+    prototype: SVGFETileElement;
+    new(): SVGFETileElement;
+};
+
+interface SVGFETurbulenceElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly baseFrequencyX: SVGAnimatedNumber;
+    readonly baseFrequencyY: SVGAnimatedNumber;
+    readonly numOctaves: SVGAnimatedInteger;
+    readonly seed: SVGAnimatedNumber;
+    readonly stitchTiles: SVGAnimatedEnumeration;
+    readonly type: SVGAnimatedEnumeration;
+    readonly SVG_STITCHTYPE_NOSTITCH: number;
+    readonly SVG_STITCHTYPE_STITCH: number;
+    readonly SVG_STITCHTYPE_UNKNOWN: number;
+    readonly SVG_TURBULENCE_TYPE_FRACTALNOISE: number;
+    readonly SVG_TURBULENCE_TYPE_TURBULENCE: number;
+    readonly SVG_TURBULENCE_TYPE_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFETurbulenceElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFETurbulenceElement: {
+    prototype: SVGFETurbulenceElement;
+    new(): SVGFETurbulenceElement;
+    readonly SVG_STITCHTYPE_NOSTITCH: number;
+    readonly SVG_STITCHTYPE_STITCH: number;
+    readonly SVG_STITCHTYPE_UNKNOWN: number;
+    readonly SVG_TURBULENCE_TYPE_FRACTALNOISE: number;
+    readonly SVG_TURBULENCE_TYPE_TURBULENCE: number;
+    readonly SVG_TURBULENCE_TYPE_UNKNOWN: number;
+};
+
+interface SVGFilterElement extends SVGElement, SVGUnitTypes, SVGURIReference {
+    readonly filterResX: SVGAnimatedInteger;
+    readonly filterResY: SVGAnimatedInteger;
+    readonly filterUnits: SVGAnimatedEnumeration;
+    readonly height: SVGAnimatedLength;
+    readonly primitiveUnits: SVGAnimatedEnumeration;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+    setFilterRes(filterResX: number, filterResY: number): void;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFilterElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFilterElement: {
+    prototype: SVGFilterElement;
+    new(): SVGFilterElement;
+};
+
+interface SVGForeignObjectElement extends SVGGraphicsElement {
+    readonly height: SVGAnimatedLength;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGForeignObjectElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGForeignObjectElement: {
+    prototype: SVGForeignObjectElement;
+    new(): SVGForeignObjectElement;
+};
+
+interface SVGGElement extends SVGGraphicsElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGGElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGGElement: {
+    prototype: SVGGElement;
+    new(): SVGGElement;
+};
+
+interface SVGGradientElement extends SVGElement, SVGUnitTypes, SVGURIReference {
+    readonly gradientTransform: SVGAnimatedTransformList;
+    readonly gradientUnits: SVGAnimatedEnumeration;
+    readonly spreadMethod: SVGAnimatedEnumeration;
+    readonly SVG_SPREADMETHOD_PAD: number;
+    readonly SVG_SPREADMETHOD_REFLECT: number;
+    readonly SVG_SPREADMETHOD_REPEAT: number;
+    readonly SVG_SPREADMETHOD_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGGradientElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGGradientElement: {
+    prototype: SVGGradientElement;
+    new(): SVGGradientElement;
+    readonly SVG_SPREADMETHOD_PAD: number;
+    readonly SVG_SPREADMETHOD_REFLECT: number;
+    readonly SVG_SPREADMETHOD_REPEAT: number;
+    readonly SVG_SPREADMETHOD_UNKNOWN: number;
+};
+
+interface SVGGraphicsElement extends SVGElement, SVGTests {
+    readonly farthestViewportElement: SVGElement;
+    readonly nearestViewportElement: SVGElement;
+    readonly transform: SVGAnimatedTransformList;
+    getBBox(): SVGRect;
+    getCTM(): SVGMatrix;
+    getScreenCTM(): SVGMatrix;
+    getTransformToElement(element: SVGElement): SVGMatrix;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGGraphicsElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGGraphicsElement: {
+    prototype: SVGGraphicsElement;
+    new(): SVGGraphicsElement;
+};
+
+interface SVGImageElement extends SVGGraphicsElement, SVGURIReference {
+    readonly height: SVGAnimatedLength;
+    readonly preserveAspectRatio: SVGAnimatedPreserveAspectRatio;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGImageElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGImageElement: {
+    prototype: SVGImageElement;
+    new(): SVGImageElement;
+};
+
+interface SVGLength {
+    readonly unitType: number;
+    value: number;
+    valueAsString: string;
+    valueInSpecifiedUnits: number;
+    convertToSpecifiedUnits(unitType: number): void;
+    newValueSpecifiedUnits(unitType: number, valueInSpecifiedUnits: number): void;
+    readonly SVG_LENGTHTYPE_CM: number;
+    readonly SVG_LENGTHTYPE_EMS: number;
+    readonly SVG_LENGTHTYPE_EXS: number;
+    readonly SVG_LENGTHTYPE_IN: number;
+    readonly SVG_LENGTHTYPE_MM: number;
+    readonly SVG_LENGTHTYPE_NUMBER: number;
+    readonly SVG_LENGTHTYPE_PC: number;
+    readonly SVG_LENGTHTYPE_PERCENTAGE: number;
+    readonly SVG_LENGTHTYPE_PT: number;
+    readonly SVG_LENGTHTYPE_PX: number;
+    readonly SVG_LENGTHTYPE_UNKNOWN: number;
+}
+
+declare var SVGLength: {
+    prototype: SVGLength;
+    new(): SVGLength;
+    readonly SVG_LENGTHTYPE_CM: number;
+    readonly SVG_LENGTHTYPE_EMS: number;
+    readonly SVG_LENGTHTYPE_EXS: number;
+    readonly SVG_LENGTHTYPE_IN: number;
+    readonly SVG_LENGTHTYPE_MM: number;
+    readonly SVG_LENGTHTYPE_NUMBER: number;
+    readonly SVG_LENGTHTYPE_PC: number;
+    readonly SVG_LENGTHTYPE_PERCENTAGE: number;
+    readonly SVG_LENGTHTYPE_PT: number;
+    readonly SVG_LENGTHTYPE_PX: number;
+    readonly SVG_LENGTHTYPE_UNKNOWN: number;
+};
+
+interface SVGLengthList {
+    readonly numberOfItems: number;
+    appendItem(newItem: SVGLength): SVGLength;
+    clear(): void;
+    getItem(index: number): SVGLength;
+    initialize(newItem: SVGLength): SVGLength;
+    insertItemBefore(newItem: SVGLength, index: number): SVGLength;
+    removeItem(index: number): SVGLength;
+    replaceItem(newItem: SVGLength, index: number): SVGLength;
+}
+
+declare var SVGLengthList: {
+    prototype: SVGLengthList;
+    new(): SVGLengthList;
+};
+
+interface SVGLinearGradientElement extends SVGGradientElement {
+    readonly x1: SVGAnimatedLength;
+    readonly x2: SVGAnimatedLength;
+    readonly y1: SVGAnimatedLength;
+    readonly y2: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGLinearGradientElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGLinearGradientElement: {
+    prototype: SVGLinearGradientElement;
+    new(): SVGLinearGradientElement;
+};
+
+interface SVGLineElement extends SVGGraphicsElement {
+    readonly x1: SVGAnimatedLength;
+    readonly x2: SVGAnimatedLength;
+    readonly y1: SVGAnimatedLength;
+    readonly y2: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGLineElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGLineElement: {
+    prototype: SVGLineElement;
+    new(): SVGLineElement;
+};
+
+interface SVGMarkerElement extends SVGElement, SVGFitToViewBox {
+    readonly markerHeight: SVGAnimatedLength;
+    readonly markerUnits: SVGAnimatedEnumeration;
+    readonly markerWidth: SVGAnimatedLength;
+    readonly orientAngle: SVGAnimatedAngle;
+    readonly orientType: SVGAnimatedEnumeration;
+    readonly refX: SVGAnimatedLength;
+    readonly refY: SVGAnimatedLength;
+    setOrientToAngle(angle: SVGAngle): void;
+    setOrientToAuto(): void;
+    readonly SVG_MARKER_ORIENT_ANGLE: number;
+    readonly SVG_MARKER_ORIENT_AUTO: number;
+    readonly SVG_MARKER_ORIENT_UNKNOWN: number;
+    readonly SVG_MARKERUNITS_STROKEWIDTH: number;
+    readonly SVG_MARKERUNITS_UNKNOWN: number;
+    readonly SVG_MARKERUNITS_USERSPACEONUSE: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGMarkerElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGMarkerElement: {
+    prototype: SVGMarkerElement;
+    new(): SVGMarkerElement;
+    readonly SVG_MARKER_ORIENT_ANGLE: number;
+    readonly SVG_MARKER_ORIENT_AUTO: number;
+    readonly SVG_MARKER_ORIENT_UNKNOWN: number;
+    readonly SVG_MARKERUNITS_STROKEWIDTH: number;
+    readonly SVG_MARKERUNITS_UNKNOWN: number;
+    readonly SVG_MARKERUNITS_USERSPACEONUSE: number;
+};
+
+interface SVGMaskElement extends SVGElement, SVGTests, SVGUnitTypes {
+    readonly height: SVGAnimatedLength;
+    readonly maskContentUnits: SVGAnimatedEnumeration;
+    readonly maskUnits: SVGAnimatedEnumeration;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGMaskElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGMaskElement: {
+    prototype: SVGMaskElement;
+    new(): SVGMaskElement;
+};
+
+interface SVGMatrix {
+    a: number;
+    b: number;
+    c: number;
+    d: number;
+    e: number;
+    f: number;
+    flipX(): SVGMatrix;
+    flipY(): SVGMatrix;
+    inverse(): SVGMatrix;
+    multiply(secondMatrix: SVGMatrix): SVGMatrix;
+    rotate(angle: number): SVGMatrix;
+    rotateFromVector(x: number, y: number): SVGMatrix;
+    scale(scaleFactor: number): SVGMatrix;
+    scaleNonUniform(scaleFactorX: number, scaleFactorY: number): SVGMatrix;
+    skewX(angle: number): SVGMatrix;
+    skewY(angle: number): SVGMatrix;
+    translate(x: number, y: number): SVGMatrix;
+}
+
+declare var SVGMatrix: {
+    prototype: SVGMatrix;
+    new(): SVGMatrix;
+};
+
+interface SVGMetadataElement extends SVGElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGMetadataElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGMetadataElement: {
+    prototype: SVGMetadataElement;
+    new(): SVGMetadataElement;
+};
+
+interface SVGNumber {
+    value: number;
+}
+
+declare var SVGNumber: {
+    prototype: SVGNumber;
+    new(): SVGNumber;
+};
+
+interface SVGNumberList {
+    readonly numberOfItems: number;
+    appendItem(newItem: SVGNumber): SVGNumber;
+    clear(): void;
+    getItem(index: number): SVGNumber;
+    initialize(newItem: SVGNumber): SVGNumber;
+    insertItemBefore(newItem: SVGNumber, index: number): SVGNumber;
+    removeItem(index: number): SVGNumber;
+    replaceItem(newItem: SVGNumber, index: number): SVGNumber;
+}
+
+declare var SVGNumberList: {
+    prototype: SVGNumberList;
+    new(): SVGNumberList;
+};
+
+interface SVGPathElement extends SVGGraphicsElement {
+    readonly pathSegList: SVGPathSegList;
+    createSVGPathSegArcAbs(x: number, y: number, r1: number, r2: number, angle: number, largeArcFlag: boolean, sweepFlag: boolean): SVGPathSegArcAbs;
+    createSVGPathSegArcRel(x: number, y: number, r1: number, r2: number, angle: number, largeArcFlag: boolean, sweepFlag: boolean): SVGPathSegArcRel;
+    createSVGPathSegClosePath(): SVGPathSegClosePath;
+    createSVGPathSegCurvetoCubicAbs(x: number, y: number, x1: number, y1: number, x2: number, y2: number): SVGPathSegCurvetoCubicAbs;
+    createSVGPathSegCurvetoCubicRel(x: number, y: number, x1: number, y1: number, x2: number, y2: number): SVGPathSegCurvetoCubicRel;
+    createSVGPathSegCurvetoCubicSmoothAbs(x: number, y: number, x2: number, y2: number): SVGPathSegCurvetoCubicSmoothAbs;
+    createSVGPathSegCurvetoCubicSmoothRel(x: number, y: number, x2: number, y2: number): SVGPathSegCurvetoCubicSmoothRel;
+    createSVGPathSegCurvetoQuadraticAbs(x: number, y: number, x1: number, y1: number): SVGPathSegCurvetoQuadraticAbs;
+    createSVGPathSegCurvetoQuadraticRel(x: number, y: number, x1: number, y1: number): SVGPathSegCurvetoQuadraticRel;
+    createSVGPathSegCurvetoQuadraticSmoothAbs(x: number, y: number): SVGPathSegCurvetoQuadraticSmoothAbs;
+    createSVGPathSegCurvetoQuadraticSmoothRel(x: number, y: number): SVGPathSegCurvetoQuadraticSmoothRel;
+    createSVGPathSegLinetoAbs(x: number, y: number): SVGPathSegLinetoAbs;
+    createSVGPathSegLinetoHorizontalAbs(x: number): SVGPathSegLinetoHorizontalAbs;
+    createSVGPathSegLinetoHorizontalRel(x: number): SVGPathSegLinetoHorizontalRel;
+    createSVGPathSegLinetoRel(x: number, y: number): SVGPathSegLinetoRel;
+    createSVGPathSegLinetoVerticalAbs(y: number): SVGPathSegLinetoVerticalAbs;
+    createSVGPathSegLinetoVerticalRel(y: number): SVGPathSegLinetoVerticalRel;
+    createSVGPathSegMovetoAbs(x: number, y: number): SVGPathSegMovetoAbs;
+    createSVGPathSegMovetoRel(x: number, y: number): SVGPathSegMovetoRel;
+    getPathSegAtLength(distance: number): number;
+    getPointAtLength(distance: number): SVGPoint;
+    getTotalLength(): number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGPathElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGPathElement: {
+    prototype: SVGPathElement;
+    new(): SVGPathElement;
+};
+
+interface SVGPathSeg {
+    readonly pathSegType: number;
+    readonly pathSegTypeAsLetter: string;
+    readonly PATHSEG_ARC_ABS: number;
+    readonly PATHSEG_ARC_REL: number;
+    readonly PATHSEG_CLOSEPATH: number;
+    readonly PATHSEG_CURVETO_CUBIC_ABS: number;
+    readonly PATHSEG_CURVETO_CUBIC_REL: number;
+    readonly PATHSEG_CURVETO_CUBIC_SMOOTH_ABS: number;
+    readonly PATHSEG_CURVETO_CUBIC_SMOOTH_REL: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_ABS: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_REL: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_SMOOTH_ABS: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_SMOOTH_REL: number;
+    readonly PATHSEG_LINETO_ABS: number;
+    readonly PATHSEG_LINETO_HORIZONTAL_ABS: number;
+    readonly PATHSEG_LINETO_HORIZONTAL_REL: number;
+    readonly PATHSEG_LINETO_REL: number;
+    readonly PATHSEG_LINETO_VERTICAL_ABS: number;
+    readonly PATHSEG_LINETO_VERTICAL_REL: number;
+    readonly PATHSEG_MOVETO_ABS: number;
+    readonly PATHSEG_MOVETO_REL: number;
+    readonly PATHSEG_UNKNOWN: number;
+}
+
+declare var SVGPathSeg: {
+    prototype: SVGPathSeg;
+    new(): SVGPathSeg;
+    readonly PATHSEG_ARC_ABS: number;
+    readonly PATHSEG_ARC_REL: number;
+    readonly PATHSEG_CLOSEPATH: number;
+    readonly PATHSEG_CURVETO_CUBIC_ABS: number;
+    readonly PATHSEG_CURVETO_CUBIC_REL: number;
+    readonly PATHSEG_CURVETO_CUBIC_SMOOTH_ABS: number;
+    readonly PATHSEG_CURVETO_CUBIC_SMOOTH_REL: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_ABS: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_REL: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_SMOOTH_ABS: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_SMOOTH_REL: number;
+    readonly PATHSEG_LINETO_ABS: number;
+    readonly PATHSEG_LINETO_HORIZONTAL_ABS: number;
+    readonly PATHSEG_LINETO_HORIZONTAL_REL: number;
+    readonly PATHSEG_LINETO_REL: number;
+    readonly PATHSEG_LINETO_VERTICAL_ABS: number;
+    readonly PATHSEG_LINETO_VERTICAL_REL: number;
+    readonly PATHSEG_MOVETO_ABS: number;
+    readonly PATHSEG_MOVETO_REL: number;
+    readonly PATHSEG_UNKNOWN: number;
+};
+
+interface SVGPathSegArcAbs extends SVGPathSeg {
+    angle: number;
+    largeArcFlag: boolean;
+    r1: number;
+    r2: number;
+    sweepFlag: boolean;
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegArcAbs: {
+    prototype: SVGPathSegArcAbs;
+    new(): SVGPathSegArcAbs;
+};
+
+interface SVGPathSegArcRel extends SVGPathSeg {
+    angle: number;
+    largeArcFlag: boolean;
+    r1: number;
+    r2: number;
+    sweepFlag: boolean;
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegArcRel: {
+    prototype: SVGPathSegArcRel;
+    new(): SVGPathSegArcRel;
+};
+
+interface SVGPathSegClosePath extends SVGPathSeg {
+}
+
+declare var SVGPathSegClosePath: {
+    prototype: SVGPathSegClosePath;
+    new(): SVGPathSegClosePath;
+};
+
+interface SVGPathSegCurvetoCubicAbs extends SVGPathSeg {
+    x: number;
+    x1: number;
+    x2: number;
+    y: number;
+    y1: number;
+    y2: number;
+}
+
+declare var SVGPathSegCurvetoCubicAbs: {
+    prototype: SVGPathSegCurvetoCubicAbs;
+    new(): SVGPathSegCurvetoCubicAbs;
+};
+
+interface SVGPathSegCurvetoCubicRel extends SVGPathSeg {
+    x: number;
+    x1: number;
+    x2: number;
+    y: number;
+    y1: number;
+    y2: number;
+}
+
+declare var SVGPathSegCurvetoCubicRel: {
+    prototype: SVGPathSegCurvetoCubicRel;
+    new(): SVGPathSegCurvetoCubicRel;
+};
+
+interface SVGPathSegCurvetoCubicSmoothAbs extends SVGPathSeg {
+    x: number;
+    x2: number;
+    y: number;
+    y2: number;
+}
+
+declare var SVGPathSegCurvetoCubicSmoothAbs: {
+    prototype: SVGPathSegCurvetoCubicSmoothAbs;
+    new(): SVGPathSegCurvetoCubicSmoothAbs;
+};
+
+interface SVGPathSegCurvetoCubicSmoothRel extends SVGPathSeg {
+    x: number;
+    x2: number;
+    y: number;
+    y2: number;
+}
+
+declare var SVGPathSegCurvetoCubicSmoothRel: {
+    prototype: SVGPathSegCurvetoCubicSmoothRel;
+    new(): SVGPathSegCurvetoCubicSmoothRel;
+};
+
+interface SVGPathSegCurvetoQuadraticAbs extends SVGPathSeg {
+    x: number;
+    x1: number;
+    y: number;
+    y1: number;
+}
+
+declare var SVGPathSegCurvetoQuadraticAbs: {
+    prototype: SVGPathSegCurvetoQuadraticAbs;
+    new(): SVGPathSegCurvetoQuadraticAbs;
+};
+
+interface SVGPathSegCurvetoQuadraticRel extends SVGPathSeg {
+    x: number;
+    x1: number;
+    y: number;
+    y1: number;
+}
+
+declare var SVGPathSegCurvetoQuadraticRel: {
+    prototype: SVGPathSegCurvetoQuadraticRel;
+    new(): SVGPathSegCurvetoQuadraticRel;
+};
+
+interface SVGPathSegCurvetoQuadraticSmoothAbs extends SVGPathSeg {
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegCurvetoQuadraticSmoothAbs: {
+    prototype: SVGPathSegCurvetoQuadraticSmoothAbs;
+    new(): SVGPathSegCurvetoQuadraticSmoothAbs;
+};
+
+interface SVGPathSegCurvetoQuadraticSmoothRel extends SVGPathSeg {
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegCurvetoQuadraticSmoothRel: {
+    prototype: SVGPathSegCurvetoQuadraticSmoothRel;
+    new(): SVGPathSegCurvetoQuadraticSmoothRel;
+};
+
+interface SVGPathSegLinetoAbs extends SVGPathSeg {
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegLinetoAbs: {
+    prototype: SVGPathSegLinetoAbs;
+    new(): SVGPathSegLinetoAbs;
+};
+
+interface SVGPathSegLinetoHorizontalAbs extends SVGPathSeg {
+    x: number;
+}
+
+declare var SVGPathSegLinetoHorizontalAbs: {
+    prototype: SVGPathSegLinetoHorizontalAbs;
+    new(): SVGPathSegLinetoHorizontalAbs;
+};
+
+interface SVGPathSegLinetoHorizontalRel extends SVGPathSeg {
+    x: number;
+}
+
+declare var SVGPathSegLinetoHorizontalRel: {
+    prototype: SVGPathSegLinetoHorizontalRel;
+    new(): SVGPathSegLinetoHorizontalRel;
+};
+
+interface SVGPathSegLinetoRel extends SVGPathSeg {
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegLinetoRel: {
+    prototype: SVGPathSegLinetoRel;
+    new(): SVGPathSegLinetoRel;
+};
+
+interface SVGPathSegLinetoVerticalAbs extends SVGPathSeg {
+    y: number;
+}
+
+declare var SVGPathSegLinetoVerticalAbs: {
+    prototype: SVGPathSegLinetoVerticalAbs;
+    new(): SVGPathSegLinetoVerticalAbs;
+};
+
+interface SVGPathSegLinetoVerticalRel extends SVGPathSeg {
+    y: number;
+}
+
+declare var SVGPathSegLinetoVerticalRel: {
+    prototype: SVGPathSegLinetoVerticalRel;
+    new(): SVGPathSegLinetoVerticalRel;
+};
+
+interface SVGPathSegList {
+    readonly numberOfItems: number;
+    appendItem(newItem: SVGPathSeg): SVGPathSeg;
+    clear(): void;
+    getItem(index: number): SVGPathSeg;
+    initialize(newItem: SVGPathSeg): SVGPathSeg;
+    insertItemBefore(newItem: SVGPathSeg, index: number): SVGPathSeg;
+    removeItem(index: number): SVGPathSeg;
+    replaceItem(newItem: SVGPathSeg, index: number): SVGPathSeg;
+}
+
+declare var SVGPathSegList: {
+    prototype: SVGPathSegList;
+    new(): SVGPathSegList;
+};
+
+interface SVGPathSegMovetoAbs extends SVGPathSeg {
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegMovetoAbs: {
+    prototype: SVGPathSegMovetoAbs;
+    new(): SVGPathSegMovetoAbs;
+};
+
+interface SVGPathSegMovetoRel extends SVGPathSeg {
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegMovetoRel: {
+    prototype: SVGPathSegMovetoRel;
+    new(): SVGPathSegMovetoRel;
+};
+
+interface SVGPatternElement extends SVGElement, SVGTests, SVGUnitTypes, SVGFitToViewBox, SVGURIReference {
+    readonly height: SVGAnimatedLength;
+    readonly patternContentUnits: SVGAnimatedEnumeration;
+    readonly patternTransform: SVGAnimatedTransformList;
+    readonly patternUnits: SVGAnimatedEnumeration;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGPatternElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGPatternElement: {
+    prototype: SVGPatternElement;
+    new(): SVGPatternElement;
+};
+
+interface SVGPoint {
+    x: number;
+    y: number;
+    matrixTransform(matrix: SVGMatrix): SVGPoint;
+}
+
+declare var SVGPoint: {
+    prototype: SVGPoint;
+    new(): SVGPoint;
+};
+
+interface SVGPointList {
+    readonly numberOfItems: number;
+    appendItem(newItem: SVGPoint): SVGPoint;
+    clear(): void;
+    getItem(index: number): SVGPoint;
+    initialize(newItem: SVGPoint): SVGPoint;
+    insertItemBefore(newItem: SVGPoint, index: number): SVGPoint;
+    removeItem(index: number): SVGPoint;
+    replaceItem(newItem: SVGPoint, index: number): SVGPoint;
+}
+
+declare var SVGPointList: {
+    prototype: SVGPointList;
+    new(): SVGPointList;
+};
+
+interface SVGPolygonElement extends SVGGraphicsElement, SVGAnimatedPoints {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGPolygonElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGPolygonElement: {
+    prototype: SVGPolygonElement;
+    new(): SVGPolygonElement;
+};
+
+interface SVGPolylineElement extends SVGGraphicsElement, SVGAnimatedPoints {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGPolylineElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGPolylineElement: {
+    prototype: SVGPolylineElement;
+    new(): SVGPolylineElement;
+};
+
+interface SVGPreserveAspectRatio {
+    align: number;
+    meetOrSlice: number;
+    readonly SVG_MEETORSLICE_MEET: number;
+    readonly SVG_MEETORSLICE_SLICE: number;
+    readonly SVG_MEETORSLICE_UNKNOWN: number;
+    readonly SVG_PRESERVEASPECTRATIO_NONE: number;
+    readonly SVG_PRESERVEASPECTRATIO_UNKNOWN: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMAXYMAX: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMAXYMID: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMAXYMIN: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMIDYMAX: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMIDYMID: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMIDYMIN: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMINYMAX: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMINYMID: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMINYMIN: number;
+}
+
+declare var SVGPreserveAspectRatio: {
+    prototype: SVGPreserveAspectRatio;
+    new(): SVGPreserveAspectRatio;
+    readonly SVG_MEETORSLICE_MEET: number;
+    readonly SVG_MEETORSLICE_SLICE: number;
+    readonly SVG_MEETORSLICE_UNKNOWN: number;
+    readonly SVG_PRESERVEASPECTRATIO_NONE: number;
+    readonly SVG_PRESERVEASPECTRATIO_UNKNOWN: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMAXYMAX: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMAXYMID: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMAXYMIN: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMIDYMAX: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMIDYMID: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMIDYMIN: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMINYMAX: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMINYMID: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMINYMIN: number;
+};
+
+interface SVGRadialGradientElement extends SVGGradientElement {
+    readonly cx: SVGAnimatedLength;
+    readonly cy: SVGAnimatedLength;
+    readonly fx: SVGAnimatedLength;
+    readonly fy: SVGAnimatedLength;
+    readonly r: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGRadialGradientElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGRadialGradientElement: {
+    prototype: SVGRadialGradientElement;
+    new(): SVGRadialGradientElement;
+};
+
+interface SVGRect {
+    height: number;
+    width: number;
+    x: number;
+    y: number;
+}
+
+declare var SVGRect: {
+    prototype: SVGRect;
+    new(): SVGRect;
+};
+
+interface SVGRectElement extends SVGGraphicsElement {
+    readonly height: SVGAnimatedLength;
+    readonly rx: SVGAnimatedLength;
+    readonly ry: SVGAnimatedLength;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGRectElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGRectElement: {
+    prototype: SVGRectElement;
+    new(): SVGRectElement;
+};
+
+interface SVGScriptElement extends SVGElement, SVGURIReference {
+    type: string;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGScriptElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGScriptElement: {
+    prototype: SVGScriptElement;
+    new(): SVGScriptElement;
+};
+
+interface SVGStopElement extends SVGElement {
+    readonly offset: SVGAnimatedNumber;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGStopElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGStopElement: {
+    prototype: SVGStopElement;
+    new(): SVGStopElement;
+};
+
+interface SVGStringList {
+    readonly numberOfItems: number;
+    appendItem(newItem: string): string;
+    clear(): void;
+    getItem(index: number): string;
+    initialize(newItem: string): string;
+    insertItemBefore(newItem: string, index: number): string;
+    removeItem(index: number): string;
+    replaceItem(newItem: string, index: number): string;
+}
+
+declare var SVGStringList: {
+    prototype: SVGStringList;
+    new(): SVGStringList;
+};
+
+interface SVGStyleElement extends SVGElement {
+    disabled: boolean;
+    media: string;
+    title: string;
+    type: string;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGStyleElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGStyleElement: {
+    prototype: SVGStyleElement;
+    new(): SVGStyleElement;
+};
+
+interface SVGSVGElementEventMap extends SVGElementEventMap {
+    "SVGAbort": Event;
+    "SVGError": Event;
+    "resize": UIEvent;
+    "scroll": UIEvent;
+    "SVGUnload": Event;
+    "SVGZoom": SVGZoomEvent;
+}
+
+interface SVGSVGElement extends SVGGraphicsElement, DocumentEvent, SVGFitToViewBox, SVGZoomAndPan {
+    contentScriptType: string;
+    contentStyleType: string;
+    currentScale: number;
+    readonly currentTranslate: SVGPoint;
+    readonly height: SVGAnimatedLength;
+    onabort: (this: SVGSVGElement, ev: Event) => any;
+    onerror: (this: SVGSVGElement, ev: Event) => any;
+    onresize: (this: SVGSVGElement, ev: UIEvent) => any;
+    onscroll: (this: SVGSVGElement, ev: UIEvent) => any;
+    onunload: (this: SVGSVGElement, ev: Event) => any;
+    onzoom: (this: SVGSVGElement, ev: SVGZoomEvent) => any;
+    readonly pixelUnitToMillimeterX: number;
+    readonly pixelUnitToMillimeterY: number;
+    readonly screenPixelToMillimeterX: number;
+    readonly screenPixelToMillimeterY: number;
+    readonly viewport: SVGRect;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+    checkEnclosure(element: SVGElement, rect: SVGRect): boolean;
+    checkIntersection(element: SVGElement, rect: SVGRect): boolean;
+    createSVGAngle(): SVGAngle;
+    createSVGLength(): SVGLength;
+    createSVGMatrix(): SVGMatrix;
+    createSVGNumber(): SVGNumber;
+    createSVGPoint(): SVGPoint;
+    createSVGRect(): SVGRect;
+    createSVGTransform(): SVGTransform;
+    createSVGTransformFromMatrix(matrix: SVGMatrix): SVGTransform;
+    deselectAll(): void;
+    forceRedraw(): void;
+    getComputedStyle(elt: Element, pseudoElt?: string): CSSStyleDeclaration;
+    getCurrentTime(): number;
+    getElementById(elementId: string): Element;
+    getEnclosureList(rect: SVGRect, referenceElement: SVGElement): NodeListOf<SVGCircleElement | SVGEllipseElement | SVGImageElement | SVGLineElement | SVGPathElement | SVGPolygonElement | SVGPolylineElement | SVGRectElement | SVGTextElement | SVGUseElement>;
+    getIntersectionList(rect: SVGRect, referenceElement: SVGElement): NodeListOf<SVGCircleElement | SVGEllipseElement | SVGImageElement | SVGLineElement | SVGPathElement | SVGPolygonElement | SVGPolylineElement | SVGRectElement | SVGTextElement | SVGUseElement>;
+    pauseAnimations(): void;
+    setCurrentTime(seconds: number): void;
+    suspendRedraw(maxWaitMilliseconds: number): number;
+    unpauseAnimations(): void;
+    unsuspendRedraw(suspendHandleID: number): void;
+    unsuspendRedrawAll(): void;
+    addEventListener<K extends keyof SVGSVGElementEventMap>(type: K, listener: (this: SVGSVGElement, ev: SVGSVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGSVGElement: {
+    prototype: SVGSVGElement;
+    new(): SVGSVGElement;
+};
+
+interface SVGSwitchElement extends SVGGraphicsElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGSwitchElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGSwitchElement: {
+    prototype: SVGSwitchElement;
+    new(): SVGSwitchElement;
+};
+
+interface SVGSymbolElement extends SVGElement, SVGFitToViewBox {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGSymbolElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGSymbolElement: {
+    prototype: SVGSymbolElement;
+    new(): SVGSymbolElement;
+};
+
+interface SVGTextContentElement extends SVGGraphicsElement {
+    readonly lengthAdjust: SVGAnimatedEnumeration;
+    readonly textLength: SVGAnimatedLength;
+    getCharNumAtPosition(point: SVGPoint): number;
+    getComputedTextLength(): number;
+    getEndPositionOfChar(charnum: number): SVGPoint;
+    getExtentOfChar(charnum: number): SVGRect;
+    getNumberOfChars(): number;
+    getRotationOfChar(charnum: number): number;
+    getStartPositionOfChar(charnum: number): SVGPoint;
+    getSubStringLength(charnum: number, nchars: number): number;
+    selectSubString(charnum: number, nchars: number): void;
+    readonly LENGTHADJUST_SPACING: number;
+    readonly LENGTHADJUST_SPACINGANDGLYPHS: number;
+    readonly LENGTHADJUST_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGTextContentElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGTextContentElement: {
+    prototype: SVGTextContentElement;
+    new(): SVGTextContentElement;
+    readonly LENGTHADJUST_SPACING: number;
+    readonly LENGTHADJUST_SPACINGANDGLYPHS: number;
+    readonly LENGTHADJUST_UNKNOWN: number;
+};
+
+interface SVGTextElement extends SVGTextPositioningElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGTextElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGTextElement: {
+    prototype: SVGTextElement;
+    new(): SVGTextElement;
+};
+
+interface SVGTextPathElement extends SVGTextContentElement, SVGURIReference {
+    readonly method: SVGAnimatedEnumeration;
+    readonly spacing: SVGAnimatedEnumeration;
+    readonly startOffset: SVGAnimatedLength;
+    readonly TEXTPATH_METHODTYPE_ALIGN: number;
+    readonly TEXTPATH_METHODTYPE_STRETCH: number;
+    readonly TEXTPATH_METHODTYPE_UNKNOWN: number;
+    readonly TEXTPATH_SPACINGTYPE_AUTO: number;
+    readonly TEXTPATH_SPACINGTYPE_EXACT: number;
+    readonly TEXTPATH_SPACINGTYPE_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGTextPathElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGTextPathElement: {
+    prototype: SVGTextPathElement;
+    new(): SVGTextPathElement;
+    readonly TEXTPATH_METHODTYPE_ALIGN: number;
+    readonly TEXTPATH_METHODTYPE_STRETCH: number;
+    readonly TEXTPATH_METHODTYPE_UNKNOWN: number;
+    readonly TEXTPATH_SPACINGTYPE_AUTO: number;
+    readonly TEXTPATH_SPACINGTYPE_EXACT: number;
+    readonly TEXTPATH_SPACINGTYPE_UNKNOWN: number;
+};
+
+interface SVGTextPositioningElement extends SVGTextContentElement {
+    readonly dx: SVGAnimatedLengthList;
+    readonly dy: SVGAnimatedLengthList;
+    readonly rotate: SVGAnimatedNumberList;
+    readonly x: SVGAnimatedLengthList;
+    readonly y: SVGAnimatedLengthList;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGTextPositioningElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGTextPositioningElement: {
+    prototype: SVGTextPositioningElement;
+    new(): SVGTextPositioningElement;
+};
+
+interface SVGTitleElement extends SVGElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGTitleElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGTitleElement: {
+    prototype: SVGTitleElement;
+    new(): SVGTitleElement;
+};
+
+interface SVGTransform {
+    readonly angle: number;
+    readonly matrix: SVGMatrix;
+    readonly type: number;
+    setMatrix(matrix: SVGMatrix): void;
+    setRotate(angle: number, cx: number, cy: number): void;
+    setScale(sx: number, sy: number): void;
+    setSkewX(angle: number): void;
+    setSkewY(angle: number): void;
+    setTranslate(tx: number, ty: number): void;
+    readonly SVG_TRANSFORM_MATRIX: number;
+    readonly SVG_TRANSFORM_ROTATE: number;
+    readonly SVG_TRANSFORM_SCALE: number;
+    readonly SVG_TRANSFORM_SKEWX: number;
+    readonly SVG_TRANSFORM_SKEWY: number;
+    readonly SVG_TRANSFORM_TRANSLATE: number;
+    readonly SVG_TRANSFORM_UNKNOWN: number;
+}
+
+declare var SVGTransform: {
+    prototype: SVGTransform;
+    new(): SVGTransform;
+    readonly SVG_TRANSFORM_MATRIX: number;
+    readonly SVG_TRANSFORM_ROTATE: number;
+    readonly SVG_TRANSFORM_SCALE: number;
+    readonly SVG_TRANSFORM_SKEWX: number;
+    readonly SVG_TRANSFORM_SKEWY: number;
+    readonly SVG_TRANSFORM_TRANSLATE: number;
+    readonly SVG_TRANSFORM_UNKNOWN: number;
+};
+
+interface SVGTransformList {
+    readonly numberOfItems: number;
+    appendItem(newItem: SVGTransform): SVGTransform;
+    clear(): void;
+    consolidate(): SVGTransform;
+    createSVGTransformFromMatrix(matrix: SVGMatrix): SVGTransform;
+    getItem(index: number): SVGTransform;
+    initialize(newItem: SVGTransform): SVGTransform;
+    insertItemBefore(newItem: SVGTransform, index: number): SVGTransform;
+    removeItem(index: number): SVGTransform;
+    replaceItem(newItem: SVGTransform, index: number): SVGTransform;
+}
+
+declare var SVGTransformList: {
+    prototype: SVGTransformList;
+    new(): SVGTransformList;
+};
+
+interface SVGTSpanElement extends SVGTextPositioningElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGTSpanElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGTSpanElement: {
+    prototype: SVGTSpanElement;
+    new(): SVGTSpanElement;
+};
+
+interface SVGUnitTypes {
+    readonly SVG_UNIT_TYPE_OBJECTBOUNDINGBOX: number;
+    readonly SVG_UNIT_TYPE_UNKNOWN: number;
+    readonly SVG_UNIT_TYPE_USERSPACEONUSE: number;
+}
+declare var SVGUnitTypes: SVGUnitTypes;
+
+interface SVGUseElement extends SVGGraphicsElement, SVGURIReference {
+    readonly animatedInstanceRoot: SVGElementInstance;
+    readonly height: SVGAnimatedLength;
+    readonly instanceRoot: SVGElementInstance;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGUseElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGUseElement: {
+    prototype: SVGUseElement;
+    new(): SVGUseElement;
+};
+
+interface SVGViewElement extends SVGElement, SVGZoomAndPan, SVGFitToViewBox {
+    readonly viewTarget: SVGStringList;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGViewElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGViewElement: {
+    prototype: SVGViewElement;
+    new(): SVGViewElement;
+};
+
+interface SVGZoomAndPan {
+    readonly zoomAndPan: number;
+}
+
+declare var SVGZoomAndPan: {
+    readonly SVG_ZOOMANDPAN_DISABLE: number;
+    readonly SVG_ZOOMANDPAN_MAGNIFY: number;
+    readonly SVG_ZOOMANDPAN_UNKNOWN: number;
+};
+
+interface SVGZoomEvent extends UIEvent {
+    readonly newScale: number;
+    readonly newTranslate: SVGPoint;
+    readonly previousScale: number;
+    readonly previousTranslate: SVGPoint;
+    readonly zoomRectScreen: SVGRect;
+}
+
+declare var SVGZoomEvent: {
+    prototype: SVGZoomEvent;
+    new(): SVGZoomEvent;
+};
+
+interface SyncManager {
+    getTags(): any;
+    register(tag: string): Promise<void>;
+}
+
+declare var SyncManager: {
+    prototype: SyncManager;
+    new(): SyncManager;
+};
+
+interface Text extends CharacterData {
+    readonly wholeText: string;
+    readonly assignedSlot: HTMLSlotElement | null;
+    splitText(offset: number): Text;
+}
+
+declare var Text: {
+    prototype: Text;
+    new(data?: string): Text;
+};
+
+interface TextEvent extends UIEvent {
+    readonly data: string;
+    readonly inputMethod: number;
+    readonly locale: string;
+    initTextEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, dataArg: string, inputMethod: number, locale: string): void;
+    readonly DOM_INPUT_METHOD_DROP: number;
+    readonly DOM_INPUT_METHOD_HANDWRITING: number;
+    readonly DOM_INPUT_METHOD_IME: number;
+    readonly DOM_INPUT_METHOD_KEYBOARD: number;
+    readonly DOM_INPUT_METHOD_MULTIMODAL: number;
+    readonly DOM_INPUT_METHOD_OPTION: number;
+    readonly DOM_INPUT_METHOD_PASTE: number;
+    readonly DOM_INPUT_METHOD_SCRIPT: number;
+    readonly DOM_INPUT_METHOD_UNKNOWN: number;
+    readonly DOM_INPUT_METHOD_VOICE: number;
+}
+
+declare var TextEvent: {
+    prototype: TextEvent;
+    new(): TextEvent;
+    readonly DOM_INPUT_METHOD_DROP: number;
+    readonly DOM_INPUT_METHOD_HANDWRITING: number;
+    readonly DOM_INPUT_METHOD_IME: number;
+    readonly DOM_INPUT_METHOD_KEYBOARD: number;
+    readonly DOM_INPUT_METHOD_MULTIMODAL: number;
+    readonly DOM_INPUT_METHOD_OPTION: number;
+    readonly DOM_INPUT_METHOD_PASTE: number;
+    readonly DOM_INPUT_METHOD_SCRIPT: number;
+    readonly DOM_INPUT_METHOD_UNKNOWN: number;
+    readonly DOM_INPUT_METHOD_VOICE: number;
+};
+
+interface TextMetrics {
+    readonly width: number;
+}
+
+declare var TextMetrics: {
+    prototype: TextMetrics;
+    new(): TextMetrics;
+};
+
+interface TextTrackEventMap {
+    "cuechange": Event;
+    "error": Event;
+    "load": Event;
+}
+
+interface TextTrack extends EventTarget {
+    readonly activeCues: TextTrackCueList;
+    readonly cues: TextTrackCueList;
+    readonly inBandMetadataTrackDispatchType: string;
+    readonly kind: string;
+    readonly label: string;
+    readonly language: string;
+    mode: any;
+    oncuechange: (this: TextTrack, ev: Event) => any;
+    onerror: (this: TextTrack, ev: Event) => any;
+    onload: (this: TextTrack, ev: Event) => any;
+    readonly readyState: number;
+    addCue(cue: TextTrackCue): void;
+    removeCue(cue: TextTrackCue): void;
+    readonly DISABLED: number;
+    readonly ERROR: number;
+    readonly HIDDEN: number;
+    readonly LOADED: number;
+    readonly LOADING: number;
+    readonly NONE: number;
+    readonly SHOWING: number;
+    addEventListener<K extends keyof TextTrackEventMap>(type: K, listener: (this: TextTrack, ev: TextTrackEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var TextTrack: {
+    prototype: TextTrack;
+    new(): TextTrack;
+    readonly DISABLED: number;
+    readonly ERROR: number;
+    readonly HIDDEN: number;
+    readonly LOADED: number;
+    readonly LOADING: number;
+    readonly NONE: number;
+    readonly SHOWING: number;
+};
+
+interface TextTrackCueEventMap {
+    "enter": Event;
+    "exit": Event;
+}
+
+interface TextTrackCue extends EventTarget {
+    endTime: number;
+    id: string;
+    onenter: (this: TextTrackCue, ev: Event) => any;
+    onexit: (this: TextTrackCue, ev: Event) => any;
+    pauseOnExit: boolean;
+    startTime: number;
+    text: string;
+    readonly track: TextTrack;
+    getCueAsHTML(): DocumentFragment;
+    addEventListener<K extends keyof TextTrackCueEventMap>(type: K, listener: (this: TextTrackCue, ev: TextTrackCueEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var TextTrackCue: {
+    prototype: TextTrackCue;
+    new(startTime: number, endTime: number, text: string): TextTrackCue;
+};
+
+interface TextTrackCueList {
+    readonly length: number;
+    getCueById(id: string): TextTrackCue;
+    item(index: number): TextTrackCue;
+    [index: number]: TextTrackCue;
+}
+
+declare var TextTrackCueList: {
+    prototype: TextTrackCueList;
+    new(): TextTrackCueList;
+};
+
+interface TextTrackListEventMap {
+    "addtrack": TrackEvent;
+}
+
+interface TextTrackList extends EventTarget {
+    readonly length: number;
+    onaddtrack: ((this: TextTrackList, ev: TrackEvent) => any) | null;
+    item(index: number): TextTrack;
+    addEventListener<K extends keyof TextTrackListEventMap>(type: K, listener: (this: TextTrackList, ev: TextTrackListEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+    [index: number]: TextTrack;
+}
+
+declare var TextTrackList: {
+    prototype: TextTrackList;
+    new(): TextTrackList;
+};
+
+interface TimeRanges {
+    readonly length: number;
+    end(index: number): number;
+    start(index: number): number;
+}
+
+declare var TimeRanges: {
+    prototype: TimeRanges;
+    new(): TimeRanges;
+};
+
+interface Touch {
+    readonly clientX: number;
+    readonly clientY: number;
+    readonly identifier: number;
+    readonly pageX: number;
+    readonly pageY: number;
+    readonly screenX: number;
+    readonly screenY: number;
+    readonly target: EventTarget;
+}
+
+declare var Touch: {
+    prototype: Touch;
+    new(): Touch;
+};
+
+interface TouchEvent extends UIEvent {
+    readonly altKey: boolean;
+    readonly changedTouches: TouchList;
+    readonly charCode: number;
+    readonly ctrlKey: boolean;
+    readonly keyCode: number;
+    readonly metaKey: boolean;
+    readonly shiftKey: boolean;
+    readonly targetTouches: TouchList;
+    readonly touches: TouchList;
+    readonly which: number;
+}
+
+declare var TouchEvent: {
+    prototype: TouchEvent;
+    new(type: string, touchEventInit?: TouchEventInit): TouchEvent;
+};
+
+interface TouchList {
+    readonly length: number;
+    item(index: number): Touch | null;
+    [index: number]: Touch;
+}
+
+declare var TouchList: {
+    prototype: TouchList;
+    new(): TouchList;
+};
+
+interface TrackEvent extends Event {
+    readonly track: VideoTrack | AudioTrack | TextTrack | null;
+}
+
+declare var TrackEvent: {
+    prototype: TrackEvent;
+    new(typeArg: string, eventInitDict?: TrackEventInit): TrackEvent;
+};
+
+interface TransitionEvent extends Event {
+    readonly elapsedTime: number;
+    readonly propertyName: string;
+    initTransitionEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, propertyNameArg: string, elapsedTimeArg: number): void;
+}
+
+declare var TransitionEvent: {
+    prototype: TransitionEvent;
+    new(typeArg: string, eventInitDict?: TransitionEventInit): TransitionEvent;
+};
+
+interface TreeWalker {
+    currentNode: Node;
+    readonly expandEntityReferences: boolean;
+    readonly filter: NodeFilter;
+    readonly root: Node;
+    readonly whatToShow: number;
+    firstChild(): Node;
+    lastChild(): Node;
+    nextNode(): Node;
+    nextSibling(): Node;
+    parentNode(): Node;
+    previousNode(): Node;
+    previousSibling(): Node;
+}
+
+declare var TreeWalker: {
+    prototype: TreeWalker;
+    new(): TreeWalker;
+};
+
+interface UIEvent extends Event {
+    readonly detail: number;
+    readonly view: Window;
+    initUIEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number): void;
+}
+
+declare var UIEvent: {
+    prototype: UIEvent;
+    new(typeArg: string, eventInitDict?: UIEventInit): UIEvent;
+};
+
+interface UnviewableContentIdentifiedEvent extends NavigationEventWithReferrer {
+    readonly mediaType: string;
+}
+
+declare var UnviewableContentIdentifiedEvent: {
+    prototype: UnviewableContentIdentifiedEvent;
+    new(): UnviewableContentIdentifiedEvent;
+};
+
+interface URL {
+    hash: string;
+    host: string;
+    hostname: string;
+    href: string;
+    readonly origin: string;
+    password: string;
+    pathname: string;
+    port: string;
+    protocol: string;
+    search: string;
+    username: string;
+    readonly searchParams: URLSearchParams;
+    toString(): string;
+}
+
+declare var URL: {
+    prototype: URL;
+    new(url: string, base?: string): URL;
+    createObjectURL(object: any, options?: ObjectURLOptions): string;
+    revokeObjectURL(url: string): void;
+};
+
+interface ValidityState {
+    readonly badInput: boolean;
+    readonly customError: boolean;
+    readonly patternMismatch: boolean;
+    readonly rangeOverflow: boolean;
+    readonly rangeUnderflow: boolean;
+    readonly stepMismatch: boolean;
+    readonly tooLong: boolean;
+    readonly typeMismatch: boolean;
+    readonly valid: boolean;
+    readonly valueMissing: boolean;
+}
+
+declare var ValidityState: {
+    prototype: ValidityState;
+    new(): ValidityState;
+};
+
+interface VideoPlaybackQuality {
+    readonly corruptedVideoFrames: number;
+    readonly creationTime: number;
+    readonly droppedVideoFrames: number;
+    readonly totalFrameDelay: number;
+    readonly totalVideoFrames: number;
+}
+
+declare var VideoPlaybackQuality: {
+    prototype: VideoPlaybackQuality;
+    new(): VideoPlaybackQuality;
+};
+
+interface VideoTrack {
+    readonly id: string;
+    kind: string;
+    readonly label: string;
+    language: string;
+    selected: boolean;
+    readonly sourceBuffer: SourceBuffer;
+}
+
+declare var VideoTrack: {
+    prototype: VideoTrack;
+    new(): VideoTrack;
+};
+
+interface VideoTrackListEventMap {
+    "addtrack": TrackEvent;
+    "change": Event;
+    "removetrack": TrackEvent;
+}
+
+interface VideoTrackList extends EventTarget {
+    readonly length: number;
+    onaddtrack: (this: VideoTrackList, ev: TrackEvent) => any;
+    onchange: (this: VideoTrackList, ev: Event) => any;
+    onremovetrack: (this: VideoTrackList, ev: TrackEvent) => any;
+    readonly selectedIndex: number;
+    getTrackById(id: string): VideoTrack | null;
+    item(index: number): VideoTrack;
+    addEventListener<K extends keyof VideoTrackListEventMap>(type: K, listener: (this: VideoTrackList, ev: VideoTrackListEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+    [index: number]: VideoTrack;
+}
+
+declare var VideoTrackList: {
+    prototype: VideoTrackList;
+    new(): VideoTrackList;
+};
+
+interface WaveShaperNode extends AudioNode {
+    curve: Float32Array | null;
+    oversample: OverSampleType;
+}
+
+declare var WaveShaperNode: {
+    prototype: WaveShaperNode;
+    new(): WaveShaperNode;
+};
+
+interface WebAuthentication {
+    getAssertion(assertionChallenge: any, options?: AssertionOptions): Promise<WebAuthnAssertion>;
+    makeCredential(accountInformation: Account, cryptoParameters: ScopedCredentialParameters[], attestationChallenge: any, options?: ScopedCredentialOptions): Promise<ScopedCredentialInfo>;
+}
+
+declare var WebAuthentication: {
+    prototype: WebAuthentication;
+    new(): WebAuthentication;
+};
+
+interface WebAuthnAssertion {
+    readonly authenticatorData: ArrayBuffer;
+    readonly clientData: ArrayBuffer;
+    readonly credential: ScopedCredential;
+    readonly signature: ArrayBuffer;
+}
+
+declare var WebAuthnAssertion: {
+    prototype: WebAuthnAssertion;
+    new(): WebAuthnAssertion;
+};
+
+interface WEBGL_compressed_texture_s3tc {
+    readonly COMPRESSED_RGB_S3TC_DXT1_EXT: number;
+    readonly COMPRESSED_RGBA_S3TC_DXT1_EXT: number;
+    readonly COMPRESSED_RGBA_S3TC_DXT3_EXT: number;
+    readonly COMPRESSED_RGBA_S3TC_DXT5_EXT: number;
+}
+
+declare var WEBGL_compressed_texture_s3tc: {
+    prototype: WEBGL_compressed_texture_s3tc;
+    new(): WEBGL_compressed_texture_s3tc;
+    readonly COMPRESSED_RGB_S3TC_DXT1_EXT: number;
+    readonly COMPRESSED_RGBA_S3TC_DXT1_EXT: number;
+    readonly COMPRESSED_RGBA_S3TC_DXT3_EXT: number;
+    readonly COMPRESSED_RGBA_S3TC_DXT5_EXT: number;
+};
+
+interface WEBGL_debug_renderer_info {
+    readonly UNMASKED_RENDERER_WEBGL: number;
+    readonly UNMASKED_VENDOR_WEBGL: number;
+}
+
+declare var WEBGL_debug_renderer_info: {
+    prototype: WEBGL_debug_renderer_info;
+    new(): WEBGL_debug_renderer_info;
+    readonly UNMASKED_RENDERER_WEBGL: number;
+    readonly UNMASKED_VENDOR_WEBGL: number;
+};
+
+interface WEBGL_depth_texture {
+    readonly UNSIGNED_INT_24_8_WEBGL: number;
+}
+
+declare var WEBGL_depth_texture: {
+    prototype: WEBGL_depth_texture;
+    new(): WEBGL_depth_texture;
+    readonly UNSIGNED_INT_24_8_WEBGL: number;
+};
+
+interface WebGLActiveInfo {
+    readonly name: string;
+    readonly size: number;
+    readonly type: number;
+}
+
+declare var WebGLActiveInfo: {
+    prototype: WebGLActiveInfo;
+    new(): WebGLActiveInfo;
+};
+
+interface WebGLBuffer extends WebGLObject {
+}
+
+declare var WebGLBuffer: {
+    prototype: WebGLBuffer;
+    new(): WebGLBuffer;
+};
+
+interface WebGLContextEvent extends Event {
+    readonly statusMessage: string;
+}
+
+declare var WebGLContextEvent: {
+    prototype: WebGLContextEvent;
+    new(typeArg: string, eventInitDict?: WebGLContextEventInit): WebGLContextEvent;
+};
+
+interface WebGLFramebuffer extends WebGLObject {
+}
+
+declare var WebGLFramebuffer: {
+    prototype: WebGLFramebuffer;
+    new(): WebGLFramebuffer;
+};
+
+interface WebGLObject {
+}
+
+declare var WebGLObject: {
+    prototype: WebGLObject;
+    new(): WebGLObject;
+};
+
+interface WebGLProgram extends WebGLObject {
+}
+
+declare var WebGLProgram: {
+    prototype: WebGLProgram;
+    new(): WebGLProgram;
+};
+
+interface WebGLRenderbuffer extends WebGLObject {
+}
+
+declare var WebGLRenderbuffer: {
+    prototype: WebGLRenderbuffer;
+    new(): WebGLRenderbuffer;
+};
+
+interface WebGLRenderingContext {
+    readonly canvas: HTMLCanvasElement;
+    readonly drawingBufferHeight: number;
+    readonly drawingBufferWidth: number;
+    activeTexture(texture: number): void;
+    attachShader(program: WebGLProgram | null, shader: WebGLShader | null): void;
+    bindAttribLocation(program: WebGLProgram | null, index: number, name: string): void;
+    bindBuffer(target: number, buffer: WebGLBuffer | null): void;
+    bindFramebuffer(target: number, framebuffer: WebGLFramebuffer | null): void;
+    bindRenderbuffer(target: number, renderbuffer: WebGLRenderbuffer | null): void;
+    bindTexture(target: number, texture: WebGLTexture | null): void;
+    blendColor(red: number, green: number, blue: number, alpha: number): void;
+    blendEquation(mode: number): void;
+    blendEquationSeparate(modeRGB: number, modeAlpha: number): void;
+    blendFunc(sfactor: number, dfactor: number): void;
+    blendFuncSeparate(srcRGB: number, dstRGB: number, srcAlpha: number, dstAlpha: number): void;
+    bufferData(target: number, size: number | ArrayBufferView | ArrayBuffer, usage: number): void;
+    bufferSubData(target: number, offset: number, data: ArrayBufferView | ArrayBuffer): void;
+    checkFramebufferStatus(target: number): number;
+    clear(mask: number): void;
+    clearColor(red: number, green: number, blue: number, alpha: number): void;
+    clearDepth(depth: number): void;
+    clearStencil(s: number): void;
+    colorMask(red: boolean, green: boolean, blue: boolean, alpha: boolean): void;
+    compileShader(shader: WebGLShader | null): void;
+    compressedTexImage2D(target: number, level: number, internalformat: number, width: number, height: number, border: number, data: ArrayBufferView): void;
+    compressedTexSubImage2D(target: number, level: number, xoffset: number, yoffset: number, width: number, height: number, format: number, data: ArrayBufferView): void;
+    copyTexImage2D(target: number, level: number, internalformat: number, x: number, y: number, width: number, height: number, border: number): void;
+    copyTexSubImage2D(target: number, level: number, xoffset: number, yoffset: number, x: number, y: number, width: number, height: number): void;
+    createBuffer(): WebGLBuffer | null;
+    createFramebuffer(): WebGLFramebuffer | null;
+    createProgram(): WebGLProgram | null;
+    createRenderbuffer(): WebGLRenderbuffer | null;
+    createShader(type: number): WebGLShader | null;
+    createTexture(): WebGLTexture | null;
+    cullFace(mode: number): void;
+    deleteBuffer(buffer: WebGLBuffer | null): void;
+    deleteFramebuffer(framebuffer: WebGLFramebuffer | null): void;
+    deleteProgram(program: WebGLProgram | null): void;
+    deleteRenderbuffer(renderbuffer: WebGLRenderbuffer | null): void;
+    deleteShader(shader: WebGLShader | null): void;
+    deleteTexture(texture: WebGLTexture | null): void;
+    depthFunc(func: number): void;
+    depthMask(flag: boolean): void;
+    depthRange(zNear: number, zFar: number): void;
+    detachShader(program: WebGLProgram | null, shader: WebGLShader | null): void;
+    disable(cap: number): void;
+    disableVertexAttribArray(index: number): void;
+    drawArrays(mode: number, first: number, count: number): void;
+    drawElements(mode: number, count: number, type: number, offset: number): void;
+    enable(cap: number): void;
+    enableVertexAttribArray(index: number): void;
+    finish(): void;
+    flush(): void;
+    framebufferRenderbuffer(target: number, attachment: number, renderbuffertarget: number, renderbuffer: WebGLRenderbuffer | null): void;
+    framebufferTexture2D(target: number, attachment: number, textarget: number, texture: WebGLTexture | null, level: number): void;
+    frontFace(mode: number): void;
+    generateMipmap(target: number): void;
+    getActiveAttrib(program: WebGLProgram | null, index: number): WebGLActiveInfo | null;
+    getActiveUniform(program: WebGLProgram | null, index: number): WebGLActiveInfo | null;
+    getAttachedShaders(program: WebGLProgram | null): WebGLShader[] | null;
+    getAttribLocation(program: WebGLProgram | null, name: string): number;
+    getBufferParameter(target: number, pname: number): any;
+    getContextAttributes(): WebGLContextAttributes;
+    getError(): number;
+    getExtension(name: string): any;
+    getFramebufferAttachmentParameter(target: number, attachment: number, pname: number): any;
+    getParameter(pname: number): any;
+    getProgramInfoLog(program: WebGLProgram | null): string | null;
+    getProgramParameter(program: WebGLProgram | null, pname: number): any;
+    getRenderbufferParameter(target: number, pname: number): any;
+    getShaderInfoLog(shader: WebGLShader | null): string | null;
+    getShaderParameter(shader: WebGLShader | null, pname: number): any;
+    getShaderPrecisionFormat(shadertype: number, precisiontype: number): WebGLShaderPrecisionFormat | null;
+    getShaderSource(shader: WebGLShader | null): string | null;
+    getSupportedExtensions(): string[] | null;
+    getTexParameter(target: number, pname: number): any;
+    getUniform(program: WebGLProgram | null, location: WebGLUniformLocation | null): any;
+    getUniformLocation(program: WebGLProgram | null, name: string): WebGLUniformLocation | null;
+    getVertexAttrib(index: number, pname: number): any;
+    getVertexAttribOffset(index: number, pname: number): number;
+    hint(target: number, mode: number): void;
+    isBuffer(buffer: WebGLBuffer | null): boolean;
+    isContextLost(): boolean;
+    isEnabled(cap: number): boolean;
+    isFramebuffer(framebuffer: WebGLFramebuffer | null): boolean;
+    isProgram(program: WebGLProgram | null): boolean;
+    isRenderbuffer(renderbuffer: WebGLRenderbuffer | null): boolean;
+    isShader(shader: WebGLShader | null): boolean;
+    isTexture(texture: WebGLTexture | null): boolean;
+    lineWidth(width: number): void;
+    linkProgram(program: WebGLProgram | null): void;
+    pixelStorei(pname: number, param: number | boolean): void;
+    polygonOffset(factor: number, units: number): void;
+    readPixels(x: number, y: number, width: number, height: number, format: number, type: number, pixels: ArrayBufferView | null): void;
+    renderbufferStorage(target: number, internalformat: number, width: number, height: number): void;
+    sampleCoverage(value: number, invert: boolean): void;
+    scissor(x: number, y: number, width: number, height: number): void;
+    shaderSource(shader: WebGLShader | null, source: string): void;
+    stencilFunc(func: number, ref: number, mask: number): void;
+    stencilFuncSeparate(face: number, func: number, ref: number, mask: number): void;
+    stencilMask(mask: number): void;
+    stencilMaskSeparate(face: number, mask: number): void;
+    stencilOp(fail: number, zfail: number, zpass: number): void;
+    stencilOpSeparate(face: number, fail: number, zfail: number, zpass: number): void;
+    texImage2D(target: number, level: number, internalformat: number, width: number, height: number, border: number, format: number, type: number, pixels: ArrayBufferView | null): void;
+    texImage2D(target: number, level: number, internalformat: number, format: number, type: number, pixels: ImageBitmap | ImageData | HTMLVideoElement | HTMLImageElement | HTMLCanvasElement): void;
+    texParameterf(target: number, pname: number, param: number): void;
+    texParameteri(target: number, pname: number, param: number): void;
+    texSubImage2D(target: number, level: number, xoffset: number, yoffset: number, width: number, height: number, format: number, type: number, pixels: ArrayBufferView | null): void;
+    texSubImage2D(target: number, level: number, xoffset: number, yoffset: number, format: number, type: number, pixels: ImageBitmap | ImageData | HTMLVideoElement | HTMLImageElement | HTMLCanvasElement): void;
+    uniform1f(location: WebGLUniformLocation | null, x: number): void;
+    uniform1fv(location: WebGLUniformLocation, v: Float32Array | number[]): void;
+    uniform1i(location: WebGLUniformLocation | null, x: number): void;
+    uniform1iv(location: WebGLUniformLocation, v: Int32Array | number[]): void;
+    uniform2f(location: WebGLUniformLocation | null, x: number, y: number): void;
+    uniform2fv(location: WebGLUniformLocation, v: Float32Array | number[]): void;
+    uniform2i(location: WebGLUniformLocation | null, x: number, y: number): void;
+    uniform2iv(location: WebGLUniformLocation, v: Int32Array | number[]): void;
+    uniform3f(location: WebGLUniformLocation | null, x: number, y: number, z: number): void;
+    uniform3fv(location: WebGLUniformLocation, v: Float32Array | number[]): void;
+    uniform3i(location: WebGLUniformLocation | null, x: number, y: number, z: number): void;
+    uniform3iv(location: WebGLUniformLocation, v: Int32Array | number[]): void;
+    uniform4f(location: WebGLUniformLocation | null, x: number, y: number, z: number, w: number): void;
+    uniform4fv(location: WebGLUniformLocation, v: Float32Array | number[]): void;
+    uniform4i(location: WebGLUniformLocation | null, x: number, y: number, z: number, w: number): void;
+    uniform4iv(location: WebGLUniformLocation, v: Int32Array | number[]): void;
+    uniformMatrix2fv(location: WebGLUniformLocation, transpose: boolean, value: Float32Array | number[]): void;
+    uniformMatrix3fv(location: WebGLUniformLocation, transpose: boolean, value: Float32Array | number[]): void;
+    uniformMatrix4fv(location: WebGLUniformLocation, transpose: boolean, value: Float32Array | number[]): void;
+    useProgram(program: WebGLProgram | null): void;
+    validateProgram(program: WebGLProgram | null): void;
+    vertexAttrib1f(indx: number, x: number): void;
+    vertexAttrib1fv(indx: number, values: Float32Array | number[]): void;
+    vertexAttrib2f(indx: number, x: number, y: number): void;
+    vertexAttrib2fv(indx: number, values: Float32Array | number[]): void;
+    vertexAttrib3f(indx: number, x: number, y: number, z: number): void;
+    vertexAttrib3fv(indx: number, values: Float32Array | number[]): void;
+    vertexAttrib4f(indx: number, x: number, y: number, z: number, w: number): void;
+    vertexAttrib4fv(indx: number, values: Float32Array | number[]): void;
+    vertexAttribPointer(indx: number, size: number, type: number, normalized: boolean, stride: number, offset: number): void;
+    viewport(x: number, y: number, width: number, height: number): void;
+    readonly ACTIVE_ATTRIBUTES: number;
+    readonly ACTIVE_TEXTURE: number;
+    readonly ACTIVE_UNIFORMS: number;
+    readonly ALIASED_LINE_WIDTH_RANGE: number;
+    readonly ALIASED_POINT_SIZE_RANGE: number;
+    readonly ALPHA: number;
+    readonly ALPHA_BITS: number;
+    readonly ALWAYS: number;
+    readonly ARRAY_BUFFER: number;
+    readonly ARRAY_BUFFER_BINDING: number;
+    readonly ATTACHED_SHADERS: number;
+    readonly BACK: number;
+    readonly BLEND: number;
+    readonly BLEND_COLOR: number;
+    readonly BLEND_DST_ALPHA: number;
+    readonly BLEND_DST_RGB: number;
+    readonly BLEND_EQUATION: number;
+    readonly BLEND_EQUATION_ALPHA: number;
+    readonly BLEND_EQUATION_RGB: number;
+    readonly BLEND_SRC_ALPHA: number;
+    readonly BLEND_SRC_RGB: number;
+    readonly BLUE_BITS: number;
+    readonly BOOL: number;
+    readonly BOOL_VEC2: number;
+    readonly BOOL_VEC3: number;
+    readonly BOOL_VEC4: number;
+    readonly BROWSER_DEFAULT_WEBGL: number;
+    readonly BUFFER_SIZE: number;
+    readonly BUFFER_USAGE: number;
+    readonly BYTE: number;
+    readonly CCW: number;
+    readonly CLAMP_TO_EDGE: number;
+    readonly COLOR_ATTACHMENT0: number;
+    readonly COLOR_BUFFER_BIT: number;
+    readonly COLOR_CLEAR_VALUE: number;
+    readonly COLOR_WRITEMASK: number;
+    readonly COMPILE_STATUS: number;
+    readonly COMPRESSED_TEXTURE_FORMATS: number;
+    readonly CONSTANT_ALPHA: number;
+    readonly CONSTANT_COLOR: number;
+    readonly CONTEXT_LOST_WEBGL: number;
+    readonly CULL_FACE: number;
+    readonly CULL_FACE_MODE: number;
+    readonly CURRENT_PROGRAM: number;
+    readonly CURRENT_VERTEX_ATTRIB: number;
+    readonly CW: number;
+    readonly DECR: number;
+    readonly DECR_WRAP: number;
+    readonly DELETE_STATUS: number;
+    readonly DEPTH_ATTACHMENT: number;
+    readonly DEPTH_BITS: number;
+    readonly DEPTH_BUFFER_BIT: number;
+    readonly DEPTH_CLEAR_VALUE: number;
+    readonly DEPTH_COMPONENT: number;
+    readonly DEPTH_COMPONENT16: number;
+    readonly DEPTH_FUNC: number;
+    readonly DEPTH_RANGE: number;
+    readonly DEPTH_STENCIL: number;
+    readonly DEPTH_STENCIL_ATTACHMENT: number;
+    readonly DEPTH_TEST: number;
+    readonly DEPTH_WRITEMASK: number;
+    readonly DITHER: number;
+    readonly DONT_CARE: number;
+    readonly DST_ALPHA: number;
+    readonly DST_COLOR: number;
+    readonly DYNAMIC_DRAW: number;
+    readonly ELEMENT_ARRAY_BUFFER: number;
+    readonly ELEMENT_ARRAY_BUFFER_BINDING: number;
+    readonly EQUAL: number;
+    readonly FASTEST: number;
+    readonly FLOAT: number;
+    readonly FLOAT_MAT2: number;
+    readonly FLOAT_MAT3: number;
+    readonly FLOAT_MAT4: number;
+    readonly FLOAT_VEC2: number;
+    readonly FLOAT_VEC3: number;
+    readonly FLOAT_VEC4: number;
+    readonly FRAGMENT_SHADER: number;
+    readonly FRAMEBUFFER: number;
+    readonly FRAMEBUFFER_ATTACHMENT_OBJECT_NAME: number;
+    readonly FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE: number;
+    readonly FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE: number;
+    readonly FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL: number;
+    readonly FRAMEBUFFER_BINDING: number;
+    readonly FRAMEBUFFER_COMPLETE: number;
+    readonly FRAMEBUFFER_INCOMPLETE_ATTACHMENT: number;
+    readonly FRAMEBUFFER_INCOMPLETE_DIMENSIONS: number;
+    readonly FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT: number;
+    readonly FRAMEBUFFER_UNSUPPORTED: number;
+    readonly FRONT: number;
+    readonly FRONT_AND_BACK: number;
+    readonly FRONT_FACE: number;
+    readonly FUNC_ADD: number;
+    readonly FUNC_REVERSE_SUBTRACT: number;
+    readonly FUNC_SUBTRACT: number;
+    readonly GENERATE_MIPMAP_HINT: number;
+    readonly GEQUAL: number;
+    readonly GREATER: number;
+    readonly GREEN_BITS: number;
+    readonly HIGH_FLOAT: number;
+    readonly HIGH_INT: number;
+    readonly IMPLEMENTATION_COLOR_READ_FORMAT: number;
+    readonly IMPLEMENTATION_COLOR_READ_TYPE: number;
+    readonly INCR: number;
+    readonly INCR_WRAP: number;
+    readonly INT: number;
+    readonly INT_VEC2: number;
+    readonly INT_VEC3: number;
+    readonly INT_VEC4: number;
+    readonly INVALID_ENUM: number;
+    readonly INVALID_FRAMEBUFFER_OPERATION: number;
+    readonly INVALID_OPERATION: number;
+    readonly INVALID_VALUE: number;
+    readonly INVERT: number;
+    readonly KEEP: number;
+    readonly LEQUAL: number;
+    readonly LESS: number;
+    readonly LINE_LOOP: number;
+    readonly LINE_STRIP: number;
+    readonly LINE_WIDTH: number;
+    readonly LINEAR: number;
+    readonly LINEAR_MIPMAP_LINEAR: number;
+    readonly LINEAR_MIPMAP_NEAREST: number;
+    readonly LINES: number;
+    readonly LINK_STATUS: number;
+    readonly LOW_FLOAT: number;
+    readonly LOW_INT: number;
+    readonly LUMINANCE: number;
+    readonly LUMINANCE_ALPHA: number;
+    readonly MAX_COMBINED_TEXTURE_IMAGE_UNITS: number;
+    readonly MAX_CUBE_MAP_TEXTURE_SIZE: number;
+    readonly MAX_FRAGMENT_UNIFORM_VECTORS: number;
+    readonly MAX_RENDERBUFFER_SIZE: number;
+    readonly MAX_TEXTURE_IMAGE_UNITS: number;
+    readonly MAX_TEXTURE_SIZE: number;
+    readonly MAX_VARYING_VECTORS: number;
+    readonly MAX_VERTEX_ATTRIBS: number;
+    readonly MAX_VERTEX_TEXTURE_IMAGE_UNITS: number;
+    readonly MAX_VERTEX_UNIFORM_VECTORS: number;
+    readonly MAX_VIEWPORT_DIMS: number;
+    readonly MEDIUM_FLOAT: number;
+    readonly MEDIUM_INT: number;
+    readonly MIRRORED_REPEAT: number;
+    readonly NEAREST: number;
+    readonly NEAREST_MIPMAP_LINEAR: number;
+    readonly NEAREST_MIPMAP_NEAREST: number;
+    readonly NEVER: number;
+    readonly NICEST: number;
+    readonly NO_ERROR: number;
+    readonly NONE: number;
+    readonly NOTEQUAL: number;
+    readonly ONE: number;
+    readonly ONE_MINUS_CONSTANT_ALPHA: number;
+    readonly ONE_MINUS_CONSTANT_COLOR: number;
+    readonly ONE_MINUS_DST_ALPHA: number;
+    readonly ONE_MINUS_DST_COLOR: number;
+    readonly ONE_MINUS_SRC_ALPHA: number;
+    readonly ONE_MINUS_SRC_COLOR: number;
+    readonly OUT_OF_MEMORY: number;
+    readonly PACK_ALIGNMENT: number;
+    readonly POINTS: number;
+    readonly POLYGON_OFFSET_FACTOR: number;
+    readonly POLYGON_OFFSET_FILL: number;
+    readonly POLYGON_OFFSET_UNITS: number;
+    readonly RED_BITS: number;
+    readonly RENDERBUFFER: number;
+    readonly RENDERBUFFER_ALPHA_SIZE: number;
+    readonly RENDERBUFFER_BINDING: number;
+    readonly RENDERBUFFER_BLUE_SIZE: number;
+    readonly RENDERBUFFER_DEPTH_SIZE: number;
+    readonly RENDERBUFFER_GREEN_SIZE: number;
+    readonly RENDERBUFFER_HEIGHT: number;
+    readonly RENDERBUFFER_INTERNAL_FORMAT: number;
+    readonly RENDERBUFFER_RED_SIZE: number;
+    readonly RENDERBUFFER_STENCIL_SIZE: number;
+    readonly RENDERBUFFER_WIDTH: number;
+    readonly RENDERER: number;
+    readonly REPEAT: number;
+    readonly REPLACE: number;
+    readonly RGB: number;
+    readonly RGB5_A1: number;
+    readonly RGB565: number;
+    readonly RGBA: number;
+    readonly RGBA4: number;
+    readonly SAMPLE_ALPHA_TO_COVERAGE: number;
+    readonly SAMPLE_BUFFERS: number;
+    readonly SAMPLE_COVERAGE: number;
+    readonly SAMPLE_COVERAGE_INVERT: number;
+    readonly SAMPLE_COVERAGE_VALUE: number;
+    readonly SAMPLER_2D: number;
+    readonly SAMPLER_CUBE: number;
+    readonly SAMPLES: number;
+    readonly SCISSOR_BOX: number;
+    readonly SCISSOR_TEST: number;
+    readonly SHADER_TYPE: number;
+    readonly SHADING_LANGUAGE_VERSION: number;
+    readonly SHORT: number;
+    readonly SRC_ALPHA: number;
+    readonly SRC_ALPHA_SATURATE: number;
+    readonly SRC_COLOR: number;
+    readonly STATIC_DRAW: number;
+    readonly STENCIL_ATTACHMENT: number;
+    readonly STENCIL_BACK_FAIL: number;
+    readonly STENCIL_BACK_FUNC: number;
+    readonly STENCIL_BACK_PASS_DEPTH_FAIL: number;
+    readonly STENCIL_BACK_PASS_DEPTH_PASS: number;
+    readonly STENCIL_BACK_REF: number;
+    readonly STENCIL_BACK_VALUE_MASK: number;
+    readonly STENCIL_BACK_WRITEMASK: number;
+    readonly STENCIL_BITS: number;
+    readonly STENCIL_BUFFER_BIT: number;
+    readonly STENCIL_CLEAR_VALUE: number;
+    readonly STENCIL_FAIL: number;
+    readonly STENCIL_FUNC: number;
+    readonly STENCIL_INDEX: number;
+    readonly STENCIL_INDEX8: number;
+    readonly STENCIL_PASS_DEPTH_FAIL: number;
+    readonly STENCIL_PASS_DEPTH_PASS: number;
+    readonly STENCIL_REF: number;
+    readonly STENCIL_TEST: number;
+    readonly STENCIL_VALUE_MASK: number;
+    readonly STENCIL_WRITEMASK: number;
+    readonly STREAM_DRAW: number;
+    readonly SUBPIXEL_BITS: number;
+    readonly TEXTURE: number;
+    readonly TEXTURE_2D: number;
+    readonly TEXTURE_BINDING_2D: number;
+    readonly TEXTURE_BINDING_CUBE_MAP: number;
+    readonly TEXTURE_CUBE_MAP: number;
+    readonly TEXTURE_CUBE_MAP_NEGATIVE_X: number;
+    readonly TEXTURE_CUBE_MAP_NEGATIVE_Y: number;
+    readonly TEXTURE_CUBE_MAP_NEGATIVE_Z: number;
+    readonly TEXTURE_CUBE_MAP_POSITIVE_X: number;
+    readonly TEXTURE_CUBE_MAP_POSITIVE_Y: number;
+    readonly TEXTURE_CUBE_MAP_POSITIVE_Z: number;
+    readonly TEXTURE_MAG_FILTER: number;
+    readonly TEXTURE_MIN_FILTER: number;
+    readonly TEXTURE_WRAP_S: number;
+    readonly TEXTURE_WRAP_T: number;
+    readonly TEXTURE0: number;
+    readonly TEXTURE1: number;
+    readonly TEXTURE10: number;
+    readonly TEXTURE11: number;
+    readonly TEXTURE12: number;
+    readonly TEXTURE13: number;
+    readonly TEXTURE14: number;
+    readonly TEXTURE15: number;
+    readonly TEXTURE16: number;
+    readonly TEXTURE17: number;
+    readonly TEXTURE18: number;
+    readonly TEXTURE19: number;
+    readonly TEXTURE2: number;
+    readonly TEXTURE20: number;
+    readonly TEXTURE21: number;
+    readonly TEXTURE22: number;
+    readonly TEXTURE23: number;
+    readonly TEXTURE24: number;
+    readonly TEXTURE25: number;
+    readonly TEXTURE26: number;
+    readonly TEXTURE27: number;
+    readonly TEXTURE28: number;
+    readonly TEXTURE29: number;
+    readonly TEXTURE3: number;
+    readonly TEXTURE30: number;
+    readonly TEXTURE31: number;
+    readonly TEXTURE4: number;
+    readonly TEXTURE5: number;
+    readonly TEXTURE6: number;
+    readonly TEXTURE7: number;
+    readonly TEXTURE8: number;
+    readonly TEXTURE9: number;
+    readonly TRIANGLE_FAN: number;
+    readonly TRIANGLE_STRIP: number;
+    readonly TRIANGLES: number;
+    readonly UNPACK_ALIGNMENT: number;
+    readonly UNPACK_COLORSPACE_CONVERSION_WEBGL: number;
+    readonly UNPACK_FLIP_Y_WEBGL: number;
+    readonly UNPACK_PREMULTIPLY_ALPHA_WEBGL: number;
+    readonly UNSIGNED_BYTE: number;
+    readonly UNSIGNED_INT: number;
+    readonly UNSIGNED_SHORT: number;
+    readonly UNSIGNED_SHORT_4_4_4_4: number;
+    readonly UNSIGNED_SHORT_5_5_5_1: number;
+    readonly UNSIGNED_SHORT_5_6_5: number;
+    readonly VALIDATE_STATUS: number;
+    readonly VENDOR: number;
+    readonly VERSION: number;
+    readonly VERTEX_ATTRIB_ARRAY_BUFFER_BINDING: number;
+    readonly VERTEX_ATTRIB_ARRAY_ENABLED: number;
+    readonly VERTEX_ATTRIB_ARRAY_NORMALIZED: number;
+    readonly VERTEX_ATTRIB_ARRAY_POINTER: number;
+    readonly VERTEX_ATTRIB_ARRAY_SIZE: number;
+    readonly VERTEX_ATTRIB_ARRAY_STRIDE: number;
+    readonly VERTEX_ATTRIB_ARRAY_TYPE: number;
+    readonly VERTEX_SHADER: number;
+    readonly VIEWPORT: number;
+    readonly ZERO: number;
+}
+
+declare var WebGLRenderingContext: {
+    prototype: WebGLRenderingContext;
+    new(): WebGLRenderingContext;
+    readonly ACTIVE_ATTRIBUTES: number;
+    readonly ACTIVE_TEXTURE: number;
+    readonly ACTIVE_UNIFORMS: number;
+    readonly ALIASED_LINE_WIDTH_RANGE: number;
+    readonly ALIASED_POINT_SIZE_RANGE: number;
+    readonly ALPHA: number;
+    readonly ALPHA_BITS: number;
+    readonly ALWAYS: number;
+    readonly ARRAY_BUFFER: number;
+    readonly ARRAY_BUFFER_BINDING: number;
+    readonly ATTACHED_SHADERS: number;
+    readonly BACK: number;
+    readonly BLEND: number;
+    readonly BLEND_COLOR: number;
+    readonly BLEND_DST_ALPHA: number;
+    readonly BLEND_DST_RGB: number;
+    readonly BLEND_EQUATION: number;
+    readonly BLEND_EQUATION_ALPHA: number;
+    readonly BLEND_EQUATION_RGB: number;
+    readonly BLEND_SRC_ALPHA: number;
+    readonly BLEND_SRC_RGB: number;
+    readonly BLUE_BITS: number;
+    readonly BOOL: number;
+    readonly BOOL_VEC2: number;
+    readonly BOOL_VEC3: number;
+    readonly BOOL_VEC4: number;
+    readonly BROWSER_DEFAULT_WEBGL: number;
+    readonly BUFFER_SIZE: number;
+    readonly BUFFER_USAGE: number;
+    readonly BYTE: number;
+    readonly CCW: number;
+    readonly CLAMP_TO_EDGE: number;
+    readonly COLOR_ATTACHMENT0: number;
+    readonly COLOR_BUFFER_BIT: number;
+    readonly COLOR_CLEAR_VALUE: number;
+    readonly COLOR_WRITEMASK: number;
+    readonly COMPILE_STATUS: number;
+    readonly COMPRESSED_TEXTURE_FORMATS: number;
+    readonly CONSTANT_ALPHA: number;
+    readonly CONSTANT_COLOR: number;
+    readonly CONTEXT_LOST_WEBGL: number;
+    readonly CULL_FACE: number;
+    readonly CULL_FACE_MODE: number;
+    readonly CURRENT_PROGRAM: number;
+    readonly CURRENT_VERTEX_ATTRIB: number;
+    readonly CW: number;
+    readonly DECR: number;
+    readonly DECR_WRAP: number;
+    readonly DELETE_STATUS: number;
+    readonly DEPTH_ATTACHMENT: number;
+    readonly DEPTH_BITS: number;
+    readonly DEPTH_BUFFER_BIT: number;
+    readonly DEPTH_CLEAR_VALUE: number;
+    readonly DEPTH_COMPONENT: number;
+    readonly DEPTH_COMPONENT16: number;
+    readonly DEPTH_FUNC: number;
+    readonly DEPTH_RANGE: number;
+    readonly DEPTH_STENCIL: number;
+    readonly DEPTH_STENCIL_ATTACHMENT: number;
+    readonly DEPTH_TEST: number;
+    readonly DEPTH_WRITEMASK: number;
+    readonly DITHER: number;
+    readonly DONT_CARE: number;
+    readonly DST_ALPHA: number;
+    readonly DST_COLOR: number;
+    readonly DYNAMIC_DRAW: number;
+    readonly ELEMENT_ARRAY_BUFFER: number;
+    readonly ELEMENT_ARRAY_BUFFER_BINDING: number;
+    readonly EQUAL: number;
+    readonly FASTEST: number;
+    readonly FLOAT: number;
+    readonly FLOAT_MAT2: number;
+    readonly FLOAT_MAT3: number;
+    readonly FLOAT_MAT4: number;
+    readonly FLOAT_VEC2: number;
+    readonly FLOAT_VEC3: number;
+    readonly FLOAT_VEC4: number;
+    readonly FRAGMENT_SHADER: number;
+    readonly FRAMEBUFFER: number;
+    readonly FRAMEBUFFER_ATTACHMENT_OBJECT_NAME: number;
+    readonly FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE: number;
+    readonly FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE: number;
+    readonly FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL: number;
+    readonly FRAMEBUFFER_BINDING: number;
+    readonly FRAMEBUFFER_COMPLETE: number;
+    readonly FRAMEBUFFER_INCOMPLETE_ATTACHMENT: number;
+    readonly FRAMEBUFFER_INCOMPLETE_DIMENSIONS: number;
+    readonly FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT: number;
+    readonly FRAMEBUFFER_UNSUPPORTED: number;
+    readonly FRONT: number;
+    readonly FRONT_AND_BACK: number;
+    readonly FRONT_FACE: number;
+    readonly FUNC_ADD: number;
+    readonly FUNC_REVERSE_SUBTRACT: number;
+    readonly FUNC_SUBTRACT: number;
+    readonly GENERATE_MIPMAP_HINT: number;
+    readonly GEQUAL: number;
+    readonly GREATER: number;
+    readonly GREEN_BITS: number;
+    readonly HIGH_FLOAT: number;
+    readonly HIGH_INT: number;
+    readonly IMPLEMENTATION_COLOR_READ_FORMAT: number;
+    readonly IMPLEMENTATION_COLOR_READ_TYPE: number;
+    readonly INCR: number;
+    readonly INCR_WRAP: number;
+    readonly INT: number;
+    readonly INT_VEC2: number;
+    readonly INT_VEC3: number;
+    readonly INT_VEC4: number;
+    readonly INVALID_ENUM: number;
+    readonly INVALID_FRAMEBUFFER_OPERATION: number;
+    readonly INVALID_OPERATION: number;
+    readonly INVALID_VALUE: number;
+    readonly INVERT: number;
+    readonly KEEP: number;
+    readonly LEQUAL: number;
+    readonly LESS: number;
+    readonly LINE_LOOP: number;
+    readonly LINE_STRIP: number;
+    readonly LINE_WIDTH: number;
+    readonly LINEAR: number;
+    readonly LINEAR_MIPMAP_LINEAR: number;
+    readonly LINEAR_MIPMAP_NEAREST: number;
+    readonly LINES: number;
+    readonly LINK_STATUS: number;
+    readonly LOW_FLOAT: number;
+    readonly LOW_INT: number;
+    readonly LUMINANCE: number;
+    readonly LUMINANCE_ALPHA: number;
+    readonly MAX_COMBINED_TEXTURE_IMAGE_UNITS: number;
+    readonly MAX_CUBE_MAP_TEXTURE_SIZE: number;
+    readonly MAX_FRAGMENT_UNIFORM_VECTORS: number;
+    readonly MAX_RENDERBUFFER_SIZE: number;
+    readonly MAX_TEXTURE_IMAGE_UNITS: number;
+    readonly MAX_TEXTURE_SIZE: number;
+    readonly MAX_VARYING_VECTORS: number;
+    readonly MAX_VERTEX_ATTRIBS: number;
+    readonly MAX_VERTEX_TEXTURE_IMAGE_UNITS: number;
+    readonly MAX_VERTEX_UNIFORM_VECTORS: number;
+    readonly MAX_VIEWPORT_DIMS: number;
+    readonly MEDIUM_FLOAT: number;
+    readonly MEDIUM_INT: number;
+    readonly MIRRORED_REPEAT: number;
+    readonly NEAREST: number;
+    readonly NEAREST_MIPMAP_LINEAR: number;
+    readonly NEAREST_MIPMAP_NEAREST: number;
+    readonly NEVER: number;
+    readonly NICEST: number;
+    readonly NO_ERROR: number;
+    readonly NONE: number;
+    readonly NOTEQUAL: number;
+    readonly ONE: number;
+    readonly ONE_MINUS_CONSTANT_ALPHA: number;
+    readonly ONE_MINUS_CONSTANT_COLOR: number;
+    readonly ONE_MINUS_DST_ALPHA: number;
+    readonly ONE_MINUS_DST_COLOR: number;
+    readonly ONE_MINUS_SRC_ALPHA: number;
+    readonly ONE_MINUS_SRC_COLOR: number;
+    readonly OUT_OF_MEMORY: number;
+    readonly PACK_ALIGNMENT: number;
+    readonly POINTS: number;
+    readonly POLYGON_OFFSET_FACTOR: number;
+    readonly POLYGON_OFFSET_FILL: number;
+    readonly POLYGON_OFFSET_UNITS: number;
+    readonly RED_BITS: number;
+    readonly RENDERBUFFER: number;
+    readonly RENDERBUFFER_ALPHA_SIZE: number;
+    readonly RENDERBUFFER_BINDING: number;
+    readonly RENDERBUFFER_BLUE_SIZE: number;
+    readonly RENDERBUFFER_DEPTH_SIZE: number;
+    readonly RENDERBUFFER_GREEN_SIZE: number;
+    readonly RENDERBUFFER_HEIGHT: number;
+    readonly RENDERBUFFER_INTERNAL_FORMAT: number;
+    readonly RENDERBUFFER_RED_SIZE: number;
+    readonly RENDERBUFFER_STENCIL_SIZE: number;
+    readonly RENDERBUFFER_WIDTH: number;
+    readonly RENDERER: number;
+    readonly REPEAT: number;
+    readonly REPLACE: number;
+    readonly RGB: number;
+    readonly RGB5_A1: number;
+    readonly RGB565: number;
+    readonly RGBA: number;
+    readonly RGBA4: number;
+    readonly SAMPLE_ALPHA_TO_COVERAGE: number;
+    readonly SAMPLE_BUFFERS: number;
+    readonly SAMPLE_COVERAGE: number;
+    readonly SAMPLE_COVERAGE_INVERT: number;
+    readonly SAMPLE_COVERAGE_VALUE: number;
+    readonly SAMPLER_2D: number;
+    readonly SAMPLER_CUBE: number;
+    readonly SAMPLES: number;
+    readonly SCISSOR_BOX: number;
+    readonly SCISSOR_TEST: number;
+    readonly SHADER_TYPE: number;
+    readonly SHADING_LANGUAGE_VERSION: number;
+    readonly SHORT: number;
+    readonly SRC_ALPHA: number;
+    readonly SRC_ALPHA_SATURATE: number;
+    readonly SRC_COLOR: number;
+    readonly STATIC_DRAW: number;
+    readonly STENCIL_ATTACHMENT: number;
+    readonly STENCIL_BACK_FAIL: number;
+    readonly STENCIL_BACK_FUNC: number;
+    readonly STENCIL_BACK_PASS_DEPTH_FAIL: number;
+    readonly STENCIL_BACK_PASS_DEPTH_PASS: number;
+    readonly STENCIL_BACK_REF: number;
+    readonly STENCIL_BACK_VALUE_MASK: number;
+    readonly STENCIL_BACK_WRITEMASK: number;
+    readonly STENCIL_BITS: number;
+    readonly STENCIL_BUFFER_BIT: number;
+    readonly STENCIL_CLEAR_VALUE: number;
+    readonly STENCIL_FAIL: number;
+    readonly STENCIL_FUNC: number;
+    readonly STENCIL_INDEX: number;
+    readonly STENCIL_INDEX8: number;
+    readonly STENCIL_PASS_DEPTH_FAIL: number;
+    readonly STENCIL_PASS_DEPTH_PASS: number;
+    readonly STENCIL_REF: number;
+    readonly STENCIL_TEST: number;
+    readonly STENCIL_VALUE_MASK: number;
+    readonly STENCIL_WRITEMASK: number;
+    readonly STREAM_DRAW: number;
+    readonly SUBPIXEL_BITS: number;
+    readonly TEXTURE: number;
+    readonly TEXTURE_2D: number;
+    readonly TEXTURE_BINDING_2D: number;
+    readonly TEXTURE_BINDING_CUBE_MAP: number;
+    readonly TEXTURE_CUBE_MAP: number;
+    readonly TEXTURE_CUBE_MAP_NEGATIVE_X: number;
+    readonly TEXTURE_CUBE_MAP_NEGATIVE_Y: number;
+    readonly TEXTURE_CUBE_MAP_NEGATIVE_Z: number;
+    readonly TEXTURE_CUBE_MAP_POSITIVE_X: number;
+    readonly TEXTURE_CUBE_MAP_POSITIVE_Y: number;
+    readonly TEXTURE_CUBE_MAP_POSITIVE_Z: number;
+    readonly TEXTURE_MAG_FILTER: number;
+    readonly TEXTURE_MIN_FILTER: number;
+    readonly TEXTURE_WRAP_S: number;
+    readonly TEXTURE_WRAP_T: number;
+    readonly TEXTURE0: number;
+    readonly TEXTURE1: number;
+    readonly TEXTURE10: number;
+    readonly TEXTURE11: number;
+    readonly TEXTURE12: number;
+    readonly TEXTURE13: number;
+    readonly TEXTURE14: number;
+    readonly TEXTURE15: number;
+    readonly TEXTURE16: number;
+    readonly TEXTURE17: number;
+    readonly TEXTURE18: number;
+    readonly TEXTURE19: number;
+    readonly TEXTURE2: number;
+    readonly TEXTURE20: number;
+    readonly TEXTURE21: number;
+    readonly TEXTURE22: number;
+    readonly TEXTURE23: number;
+    readonly TEXTURE24: number;
+    readonly TEXTURE25: number;
+    readonly TEXTURE26: number;
+    readonly TEXTURE27: number;
+    readonly TEXTURE28: number;
+    readonly TEXTURE29: number;
+    readonly TEXTURE3: number;
+    readonly TEXTURE30: number;
+    readonly TEXTURE31: number;
+    readonly TEXTURE4: number;
+    readonly TEXTURE5: number;
+    readonly TEXTURE6: number;
+    readonly TEXTURE7: number;
+    readonly TEXTURE8: number;
+    readonly TEXTURE9: number;
+    readonly TRIANGLE_FAN: number;
+    readonly TRIANGLE_STRIP: number;
+    readonly TRIANGLES: number;
+    readonly UNPACK_ALIGNMENT: number;
+    readonly UNPACK_COLORSPACE_CONVERSION_WEBGL: number;
+    readonly UNPACK_FLIP_Y_WEBGL: number;
+    readonly UNPACK_PREMULTIPLY_ALPHA_WEBGL: number;
+    readonly UNSIGNED_BYTE: number;
+    readonly UNSIGNED_INT: number;
+    readonly UNSIGNED_SHORT: number;
+    readonly UNSIGNED_SHORT_4_4_4_4: number;
+    readonly UNSIGNED_SHORT_5_5_5_1: number;
+    readonly UNSIGNED_SHORT_5_6_5: number;
+    readonly VALIDATE_STATUS: number;
+    readonly VENDOR: number;
+    readonly VERSION: number;
+    readonly VERTEX_ATTRIB_ARRAY_BUFFER_BINDING: number;
+    readonly VERTEX_ATTRIB_ARRAY_ENABLED: number;
+    readonly VERTEX_ATTRIB_ARRAY_NORMALIZED: number;
+    readonly VERTEX_ATTRIB_ARRAY_POINTER: number;
+    readonly VERTEX_ATTRIB_ARRAY_SIZE: number;
+    readonly VERTEX_ATTRIB_ARRAY_STRIDE: number;
+    readonly VERTEX_ATTRIB_ARRAY_TYPE: number;
+    readonly VERTEX_SHADER: number;
+    readonly VIEWPORT: number;
+    readonly ZERO: number;
+};
+
+interface WebGLShader extends WebGLObject {
+}
+
+declare var WebGLShader: {
+    prototype: WebGLShader;
+    new(): WebGLShader;
+};
+
+interface WebGLShaderPrecisionFormat {
+    readonly precision: number;
+    readonly rangeMax: number;
+    readonly rangeMin: number;
+}
+
+declare var WebGLShaderPrecisionFormat: {
+    prototype: WebGLShaderPrecisionFormat;
+    new(): WebGLShaderPrecisionFormat;
+};
+
+interface WebGLTexture extends WebGLObject {
+}
+
+declare var WebGLTexture: {
+    prototype: WebGLTexture;
+    new(): WebGLTexture;
+};
+
+interface WebGLUniformLocation {
+}
+
+declare var WebGLUniformLocation: {
+    prototype: WebGLUniformLocation;
+    new(): WebGLUniformLocation;
+};
+
+interface WebKitCSSMatrix {
+    a: number;
+    b: number;
+    c: number;
+    d: number;
+    e: number;
+    f: number;
+    m11: number;
+    m12: number;
+    m13: number;
+    m14: number;
+    m21: number;
+    m22: number;
+    m23: number;
+    m24: number;
+    m31: number;
+    m32: number;
+    m33: number;
+    m34: number;
+    m41: number;
+    m42: number;
+    m43: number;
+    m44: number;
+    inverse(): WebKitCSSMatrix;
+    multiply(secondMatrix: WebKitCSSMatrix): WebKitCSSMatrix;
+    rotate(angleX: number, angleY?: number, angleZ?: number): WebKitCSSMatrix;
+    rotateAxisAngle(x: number, y: number, z: number, angle: number): WebKitCSSMatrix;
+    scale(scaleX: number, scaleY?: number, scaleZ?: number): WebKitCSSMatrix;
+    setMatrixValue(value: string): void;
+    skewX(angle: number): WebKitCSSMatrix;
+    skewY(angle: number): WebKitCSSMatrix;
+    toString(): string;
+    translate(x: number, y: number, z?: number): WebKitCSSMatrix;
+}
+
+declare var WebKitCSSMatrix: {
+    prototype: WebKitCSSMatrix;
+    new(text?: string): WebKitCSSMatrix;
+};
+
+interface WebKitDirectoryEntry extends WebKitEntry {
+    createReader(): WebKitDirectoryReader;
+}
+
+declare var WebKitDirectoryEntry: {
+    prototype: WebKitDirectoryEntry;
+    new(): WebKitDirectoryEntry;
+};
+
+interface WebKitDirectoryReader {
+    readEntries(successCallback: WebKitEntriesCallback, errorCallback?: WebKitErrorCallback): void;
+}
+
+declare var WebKitDirectoryReader: {
+    prototype: WebKitDirectoryReader;
+    new(): WebKitDirectoryReader;
+};
+
+interface WebKitEntry {
+    readonly filesystem: WebKitFileSystem;
+    readonly fullPath: string;
+    readonly isDirectory: boolean;
+    readonly isFile: boolean;
+    readonly name: string;
+}
+
+declare var WebKitEntry: {
+    prototype: WebKitEntry;
+    new(): WebKitEntry;
+};
+
+interface WebKitFileEntry extends WebKitEntry {
+    file(successCallback: WebKitFileCallback, errorCallback?: WebKitErrorCallback): void;
+}
+
+declare var WebKitFileEntry: {
+    prototype: WebKitFileEntry;
+    new(): WebKitFileEntry;
+};
+
+interface WebKitFileSystem {
+    readonly name: string;
+    readonly root: WebKitDirectoryEntry;
+}
+
+declare var WebKitFileSystem: {
+    prototype: WebKitFileSystem;
+    new(): WebKitFileSystem;
+};
+
+interface WebKitPoint {
+    x: number;
+    y: number;
+}
+
+declare var WebKitPoint: {
+    prototype: WebKitPoint;
+    new(x?: number, y?: number): WebKitPoint;
+};
+
+interface webkitRTCPeerConnection extends RTCPeerConnection {
+    addEventListener<K extends keyof RTCPeerConnectionEventMap>(type: K, listener: (this: webkitRTCPeerConnection, ev: RTCPeerConnectionEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var webkitRTCPeerConnection: {
+    prototype: webkitRTCPeerConnection;
+    new(configuration: RTCConfiguration): webkitRTCPeerConnection;
+};
+
+interface WebSocketEventMap {
+    "close": CloseEvent;
+    "error": Event;
+    "message": MessageEvent;
+    "open": Event;
+}
+
+interface WebSocket extends EventTarget {
+    binaryType: string;
+    readonly bufferedAmount: number;
+    readonly extensions: string;
+    onclose: (this: WebSocket, ev: CloseEvent) => any;
+    onerror: (this: WebSocket, ev: Event) => any;
+    onmessage: (this: WebSocket, ev: MessageEvent) => any;
+    onopen: (this: WebSocket, ev: Event) => any;
+    readonly protocol: string;
+    readonly readyState: number;
+    readonly url: string;
+    close(code?: number, reason?: string): void;
+    send(data: any): void;
+    readonly CLOSED: number;
+    readonly CLOSING: number;
+    readonly CONNECTING: number;
+    readonly OPEN: number;
+    addEventListener<K extends keyof WebSocketEventMap>(type: K, listener: (this: WebSocket, ev: WebSocketEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var WebSocket: {
+    prototype: WebSocket;
+    new(url: string, protocols?: string | string[]): WebSocket;
+    readonly CLOSED: number;
+    readonly CLOSING: number;
+    readonly CONNECTING: number;
+    readonly OPEN: number;
+};
+
+interface WheelEvent extends MouseEvent {
+    readonly deltaMode: number;
+    readonly deltaX: number;
+    readonly deltaY: number;
+    readonly deltaZ: number;
+    readonly wheelDelta: number;
+    readonly wheelDeltaX: number;
+    readonly wheelDeltaY: number;
+    getCurrentPoint(element: Element): void;
+    initWheelEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, buttonArg: number, relatedTargetArg: EventTarget, modifiersListArg: string, deltaXArg: number, deltaYArg: number, deltaZArg: number, deltaMode: number): void;
+    readonly DOM_DELTA_LINE: number;
+    readonly DOM_DELTA_PAGE: number;
+    readonly DOM_DELTA_PIXEL: number;
+}
+
+declare var WheelEvent: {
+    prototype: WheelEvent;
+    new(typeArg: string, eventInitDict?: WheelEventInit): WheelEvent;
+    readonly DOM_DELTA_LINE: number;
+    readonly DOM_DELTA_PAGE: number;
+    readonly DOM_DELTA_PIXEL: number;
+};
+
+interface WindowEventMap extends GlobalEventHandlersEventMap {
+    "abort": UIEvent;
+    "afterprint": Event;
+    "beforeprint": Event;
+    "beforeunload": BeforeUnloadEvent;
+    "blur": FocusEvent;
+    "canplay": Event;
+    "canplaythrough": Event;
+    "change": Event;
+    "click": MouseEvent;
+    "compassneedscalibration": Event;
+    "contextmenu": PointerEvent;
+    "dblclick": MouseEvent;
+    "devicelight": DeviceLightEvent;
+    "devicemotion": DeviceMotionEvent;
+    "deviceorientation": DeviceOrientationEvent;
+    "drag": DragEvent;
+    "dragend": DragEvent;
+    "dragenter": DragEvent;
+    "dragleave": DragEvent;
+    "dragover": DragEvent;
+    "dragstart": DragEvent;
+    "drop": DragEvent;
+    "durationchange": Event;
+    "emptied": Event;
+    "ended": MediaStreamErrorEvent;
+    "error": ErrorEvent;
+    "focus": FocusEvent;
+    "hashchange": HashChangeEvent;
+    "input": Event;
+    "invalid": Event;
+    "keydown": KeyboardEvent;
+    "keypress": KeyboardEvent;
+    "keyup": KeyboardEvent;
+    "load": Event;
+    "loadeddata": Event;
+    "loadedmetadata": Event;
+    "loadstart": Event;
+    "message": MessageEvent;
+    "mousedown": MouseEvent;
+    "mouseenter": MouseEvent;
+    "mouseleave": MouseEvent;
+    "mousemove": MouseEvent;
+    "mouseout": MouseEvent;
+    "mouseover": MouseEvent;
+    "mouseup": MouseEvent;
+    "mousewheel": WheelEvent;
+    "MSGestureChange": MSGestureEvent;
+    "MSGestureDoubleTap": MSGestureEvent;
+    "MSGestureEnd": MSGestureEvent;
+    "MSGestureHold": MSGestureEvent;
+    "MSGestureStart": MSGestureEvent;
+    "MSGestureTap": MSGestureEvent;
+    "MSInertiaStart": MSGestureEvent;
+    "MSPointerCancel": MSPointerEvent;
+    "MSPointerDown": MSPointerEvent;
+    "MSPointerEnter": MSPointerEvent;
+    "MSPointerLeave": MSPointerEvent;
+    "MSPointerMove": MSPointerEvent;
+    "MSPointerOut": MSPointerEvent;
+    "MSPointerOver": MSPointerEvent;
+    "MSPointerUp": MSPointerEvent;
+    "offline": Event;
+    "online": Event;
+    "orientationchange": Event;
+    "pagehide": PageTransitionEvent;
+    "pageshow": PageTransitionEvent;
+    "pause": Event;
+    "play": Event;
+    "playing": Event;
+    "popstate": PopStateEvent;
+    "progress": ProgressEvent;
+    "ratechange": Event;
+    "readystatechange": ProgressEvent;
+    "reset": Event;
+    "resize": UIEvent;
+    "scroll": UIEvent;
+    "seeked": Event;
+    "seeking": Event;
+    "select": UIEvent;
+    "stalled": Event;
+    "storage": StorageEvent;
+    "submit": Event;
+    "suspend": Event;
+    "timeupdate": Event;
+    "touchcancel": TouchEvent;
+    "touchend": TouchEvent;
+    "touchmove": TouchEvent;
+    "touchstart": TouchEvent;
+    "unload": Event;
+    "volumechange": Event;
+    "waiting": Event;
+}
+
+interface Window extends EventTarget, WindowTimers, WindowSessionStorage, WindowLocalStorage, WindowConsole, GlobalEventHandlers, IDBEnvironment, WindowBase64, GlobalFetch {
+    readonly applicationCache: ApplicationCache;
+    readonly caches: CacheStorage;
+    readonly clientInformation: Navigator;
+    readonly closed: boolean;
+    readonly crypto: Crypto;
+    defaultStatus: string;
+    readonly devicePixelRatio: number;
+    readonly document: Document;
+    readonly doNotTrack: string;
+    event: Event | undefined;
+    readonly external: External;
+    readonly frameElement: Element;
+    readonly frames: Window;
+    readonly history: History;
+    readonly innerHeight: number;
+    readonly innerWidth: number;
+    readonly isSecureContext: boolean;
+    readonly length: number;
+    readonly location: Location;
+    readonly locationbar: BarProp;
+    readonly menubar: BarProp;
+    readonly msContentScript: ExtensionScriptApis;
+    readonly msCredentials: MSCredentials;
+    name: string;
+    readonly navigator: Navigator;
+    offscreenBuffering: string | boolean;
+    onabort: (this: Window, ev: UIEvent) => any;
+    onafterprint: (this: Window, ev: Event) => any;
+    onbeforeprint: (this: Window, ev: Event) => any;
+    onbeforeunload: (this: Window, ev: BeforeUnloadEvent) => any;
+    onblur: (this: Window, ev: FocusEvent) => any;
+    oncanplay: (this: Window, ev: Event) => any;
+    oncanplaythrough: (this: Window, ev: Event) => any;
+    onchange: (this: Window, ev: Event) => any;
+    onclick: (this: Window, ev: MouseEvent) => any;
+    oncompassneedscalibration: (this: Window, ev: Event) => any;
+    oncontextmenu: (this: Window, ev: PointerEvent) => any;
+    ondblclick: (this: Window, ev: MouseEvent) => any;
+    ondevicelight: (this: Window, ev: DeviceLightEvent) => any;
+    ondevicemotion: (this: Window, ev: DeviceMotionEvent) => any;
+    ondeviceorientation: (this: Window, ev: DeviceOrientationEvent) => any;
+    ondrag: (this: Window, ev: DragEvent) => any;
+    ondragend: (this: Window, ev: DragEvent) => any;
+    ondragenter: (this: Window, ev: DragEvent) => any;
+    ondragleave: (this: Window, ev: DragEvent) => any;
+    ondragover: (this: Window, ev: DragEvent) => any;
+    ondragstart: (this: Window, ev: DragEvent) => any;
+    ondrop: (this: Window, ev: DragEvent) => any;
+    ondurationchange: (this: Window, ev: Event) => any;
+    onemptied: (this: Window, ev: Event) => any;
+    onended: (this: Window, ev: MediaStreamErrorEvent) => any;
+    onerror: ErrorEventHandler;
+    onfocus: (this: Window, ev: FocusEvent) => any;
+    onhashchange: (this: Window, ev: HashChangeEvent) => any;
+    oninput: (this: Window, ev: Event) => any;
+    oninvalid: (this: Window, ev: Event) => any;
+    onkeydown: (this: Window, ev: KeyboardEvent) => any;
+    onkeypress: (this: Window, ev: KeyboardEvent) => any;
+    onkeyup: (this: Window, ev: KeyboardEvent) => any;
+    onload: (this: Window, ev: Event) => any;
+    onloadeddata: (this: Window, ev: Event) => any;
+    onloadedmetadata: (this: Window, ev: Event) => any;
+    onloadstart: (this: Window, ev: Event) => any;
+    onmessage: (this: Window, ev: MessageEvent) => any;
+    onmousedown: (this: Window, ev: MouseEvent) => any;
+    onmouseenter: (this: Window, ev: MouseEvent) => any;
+    onmouseleave: (this: Window, ev: MouseEvent) => any;
+    onmousemove: (this: Window, ev: MouseEvent) => any;
+    onmouseout: (this: Window, ev: MouseEvent) => any;
+    onmouseover: (this: Window, ev: MouseEvent) => any;
+    onmouseup: (this: Window, ev: MouseEvent) => any;
+    onmousewheel: (this: Window, ev: WheelEvent) => any;
+    onmsgesturechange: (this: Window, ev: MSGestureEvent) => any;
+    onmsgesturedoubletap: (this: Window, ev: MSGestureEvent) => any;
+    onmsgestureend: (this: Window, ev: MSGestureEvent) => any;
+    onmsgesturehold: (this: Window, ev: MSGestureEvent) => any;
+    onmsgesturestart: (this: Window, ev: MSGestureEvent) => any;
+    onmsgesturetap: (this: Window, ev: MSGestureEvent) => any;
+    onmsinertiastart: (this: Window, ev: MSGestureEvent) => any;
+    onmspointercancel: (this: Window, ev: MSPointerEvent) => any;
+    onmspointerdown: (this: Window, ev: MSPointerEvent) => any;
+    onmspointerenter: (this: Window, ev: MSPointerEvent) => any;
+    onmspointerleave: (this: Window, ev: MSPointerEvent) => any;
+    onmspointermove: (this: Window, ev: MSPointerEvent) => any;
+    onmspointerout: (this: Window, ev: MSPointerEvent) => any;
+    onmspointerover: (this: Window, ev: MSPointerEvent) => any;
+    onmspointerup: (this: Window, ev: MSPointerEvent) => any;
+    onoffline: (this: Window, ev: Event) => any;
+    ononline: (this: Window, ev: Event) => any;
+    onorientationchange: (this: Window, ev: Event) => any;
+    onpagehide: (this: Window, ev: PageTransitionEvent) => any;
+    onpageshow: (this: Window, ev: PageTransitionEvent) => any;
+    onpause: (this: Window, ev: Event) => any;
+    onplay: (this: Window, ev: Event) => any;
+    onplaying: (this: Window, ev: Event) => any;
+    onpopstate: (this: Window, ev: PopStateEvent) => any;
+    onprogress: (this: Window, ev: ProgressEvent) => any;
+    onratechange: (this: Window, ev: Event) => any;
+    onreadystatechange: (this: Window, ev: ProgressEvent) => any;
+    onreset: (this: Window, ev: Event) => any;
+    onresize: (this: Window, ev: UIEvent) => any;
+    onscroll: (this: Window, ev: UIEvent) => any;
+    onseeked: (this: Window, ev: Event) => any;
+    onseeking: (this: Window, ev: Event) => any;
+    onselect: (this: Window, ev: UIEvent) => any;
+    onstalled: (this: Window, ev: Event) => any;
+    onstorage: (this: Window, ev: StorageEvent) => any;
+    onsubmit: (this: Window, ev: Event) => any;
+    onsuspend: (this: Window, ev: Event) => any;
+    ontimeupdate: (this: Window, ev: Event) => any;
+    ontouchcancel: (ev: TouchEvent) => any;
+    ontouchend: (ev: TouchEvent) => any;
+    ontouchmove: (ev: TouchEvent) => any;
+    ontouchstart: (ev: TouchEvent) => any;
+    onunload: (this: Window, ev: Event) => any;
+    onvolumechange: (this: Window, ev: Event) => any;
+    onwaiting: (this: Window, ev: Event) => any;
+    opener: any;
+    orientation: string | number;
+    readonly outerHeight: number;
+    readonly outerWidth: number;
+    readonly pageXOffset: number;
+    readonly pageYOffset: number;
+    readonly parent: Window;
+    readonly performance: Performance;
+    readonly personalbar: BarProp;
+    readonly screen: Screen;
+    readonly screenLeft: number;
+    readonly screenTop: number;
+    readonly screenX: number;
+    readonly screenY: number;
+    readonly scrollbars: BarProp;
+    readonly scrollX: number;
+    readonly scrollY: number;
+    readonly self: Window;
+    readonly speechSynthesis: SpeechSynthesis;
+    status: string;
+    readonly statusbar: BarProp;
+    readonly styleMedia: StyleMedia;
+    readonly toolbar: BarProp;
+    readonly top: Window;
+    readonly window: Window;
+    URL: typeof URL;
+    URLSearchParams: typeof URLSearchParams;
+    Blob: typeof Blob;
+    customElements: CustomElementRegistry;
+    alert(message?: any): void;
+    blur(): void;
+    cancelAnimationFrame(handle: number): void;
+    captureEvents(): void;
+    close(): void;
+    confirm(message?: string): boolean;
+    departFocus(navigationReason: NavigationReason, origin: FocusNavigationOrigin): void;
+    focus(): void;
+    getComputedStyle(elt: Element, pseudoElt?: string): CSSStyleDeclaration;
+    getMatchedCSSRules(elt: Element, pseudoElt?: string): CSSRuleList;
+    getSelection(): Selection;
+    matchMedia(mediaQuery: string): MediaQueryList;
+    moveBy(x?: number, y?: number): void;
+    moveTo(x?: number, y?: number): void;
+    msWriteProfilerMark(profilerMarkName: string): void;
+    open(url?: string, target?: string, features?: string, replace?: boolean): Window;
+    postMessage(message: any, targetOrigin: string, transfer?: any[]): void;
+    print(): void;
+    prompt(message?: string, _default?: string): string | null;
+    releaseEvents(): void;
+    requestAnimationFrame(callback: FrameRequestCallback): number;
+    resizeBy(x?: number, y?: number): void;
+    resizeTo(x?: number, y?: number): void;
+    scroll(x?: number, y?: number): void;
+    scrollBy(x?: number, y?: number): void;
+    scrollTo(x?: number, y?: number): void;
+    stop(): void;
+    webkitCancelAnimationFrame(handle: number): void;
+    webkitConvertPointFromNodeToPage(node: Node, pt: WebKitPoint): WebKitPoint;
+    webkitConvertPointFromPageToNode(node: Node, pt: WebKitPoint): WebKitPoint;
+    webkitRequestAnimationFrame(callback: FrameRequestCallback): number;
+    createImageBitmap(image: HTMLImageElement | SVGImageElement | HTMLVideoElement | HTMLCanvasElement | ImageBitmap | ImageData | Blob, options?: ImageBitmapOptions): Promise<ImageBitmap>;
+    createImageBitmap(image: HTMLImageElement | SVGImageElement | HTMLVideoElement | HTMLCanvasElement | ImageBitmap | ImageData | Blob, sx: number, sy: number, sw: number, sh: number, options?: ImageBitmapOptions): Promise<ImageBitmap>;
+    scroll(options?: ScrollToOptions): void;
+    scrollTo(options?: ScrollToOptions): void;
+    scrollBy(options?: ScrollToOptions): void;
+    addEventListener<K extends keyof WindowEventMap>(type: K, listener: (this: Window, ev: WindowEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var Window: {
+    prototype: Window;
+    new(): Window;
+};
+
+interface WorkerEventMap extends AbstractWorkerEventMap {
+    "message": MessageEvent;
+}
+
+interface Worker extends EventTarget, AbstractWorker {
+    onmessage: (this: Worker, ev: MessageEvent) => any;
+    postMessage(message: any, transfer?: any[]): void;
+    terminate(): void;
+    addEventListener<K extends keyof WorkerEventMap>(type: K, listener: (this: Worker, ev: WorkerEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var Worker: {
+    prototype: Worker;
+    new(stringUrl: string): Worker;
+};
+
+interface XMLDocument extends Document {
+    addEventListener<K extends keyof DocumentEventMap>(type: K, listener: (this: XMLDocument, ev: DocumentEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var XMLDocument: {
+    prototype: XMLDocument;
+    new(): XMLDocument;
+};
+
+interface XMLHttpRequestEventMap extends XMLHttpRequestEventTargetEventMap {
+    "readystatechange": Event;
+}
+
+interface XMLHttpRequest extends EventTarget, XMLHttpRequestEventTarget {
+    onreadystatechange: (this: XMLHttpRequest, ev: Event) => any;
+    readonly readyState: number;
+    readonly response: any;
+    readonly responseText: string;
+    responseType: XMLHttpRequestResponseType;
+    readonly responseURL: string;
+    readonly responseXML: Document | null;
+    readonly status: number;
+    readonly statusText: string;
+    timeout: number;
+    readonly upload: XMLHttpRequestUpload;
+    withCredentials: boolean;
+    msCaching?: string;
+    abort(): void;
+    getAllResponseHeaders(): string;
+    getResponseHeader(header: string): string | null;
+    msCachingEnabled(): boolean;
+    open(method: string, url: string, async?: boolean, user?: string, password?: string): void;
+    overrideMimeType(mime: string): void;
+    send(data?: Document): void;
+    send(data?: string): void;
+    send(data?: any): void;
+    setRequestHeader(header: string, value: string): void;
+    readonly DONE: number;
+    readonly HEADERS_RECEIVED: number;
+    readonly LOADING: number;
+    readonly OPENED: number;
+    readonly UNSENT: number;
+    addEventListener<K extends keyof XMLHttpRequestEventMap>(type: K, listener: (this: XMLHttpRequest, ev: XMLHttpRequestEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var XMLHttpRequest: {
+    prototype: XMLHttpRequest;
+    new(): XMLHttpRequest;
+    readonly DONE: number;
+    readonly HEADERS_RECEIVED: number;
+    readonly LOADING: number;
+    readonly OPENED: number;
+    readonly UNSENT: number;
+};
+
+interface XMLHttpRequestUpload extends EventTarget, XMLHttpRequestEventTarget {
+    addEventListener<K extends keyof XMLHttpRequestEventTargetEventMap>(type: K, listener: (this: XMLHttpRequestUpload, ev: XMLHttpRequestEventTargetEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var XMLHttpRequestUpload: {
+    prototype: XMLHttpRequestUpload;
+    new(): XMLHttpRequestUpload;
+};
+
+interface XMLSerializer {
+    serializeToString(target: Node): string;
+}
+
+declare var XMLSerializer: {
+    prototype: XMLSerializer;
+    new(): XMLSerializer;
+};
+
+interface XPathEvaluator {
+    createExpression(expression: string, resolver: XPathNSResolver): XPathExpression;
+    createNSResolver(nodeResolver?: Node): XPathNSResolver;
+    evaluate(expression: string, contextNode: Node, resolver: XPathNSResolver | null, type: number, result: XPathResult | null): XPathResult;
+}
+
+declare var XPathEvaluator: {
+    prototype: XPathEvaluator;
+    new(): XPathEvaluator;
+};
+
+interface XPathExpression {
+    evaluate(contextNode: Node, type: number, result: XPathResult | null): XPathResult;
+}
+
+declare var XPathExpression: {
+    prototype: XPathExpression;
+    new(): XPathExpression;
+};
+
+interface XPathNSResolver {
+    lookupNamespaceURI(prefix: string): string;
+}
+
+declare var XPathNSResolver: {
+    prototype: XPathNSResolver;
+    new(): XPathNSResolver;
+};
+
+interface XPathResult {
+    readonly booleanValue: boolean;
+    readonly invalidIteratorState: boolean;
+    readonly numberValue: number;
+    readonly resultType: number;
+    readonly singleNodeValue: Node;
+    readonly snapshotLength: number;
+    readonly stringValue: string;
+    iterateNext(): Node;
+    snapshotItem(index: number): Node;
+    readonly ANY_TYPE: number;
+    readonly ANY_UNORDERED_NODE_TYPE: number;
+    readonly BOOLEAN_TYPE: number;
+    readonly FIRST_ORDERED_NODE_TYPE: number;
+    readonly NUMBER_TYPE: number;
+    readonly ORDERED_NODE_ITERATOR_TYPE: number;
+    readonly ORDERED_NODE_SNAPSHOT_TYPE: number;
+    readonly STRING_TYPE: number;
+    readonly UNORDERED_NODE_ITERATOR_TYPE: number;
+    readonly UNORDERED_NODE_SNAPSHOT_TYPE: number;
+}
+
+declare var XPathResult: {
+    prototype: XPathResult;
+    new(): XPathResult;
+    readonly ANY_TYPE: number;
+    readonly ANY_UNORDERED_NODE_TYPE: number;
+    readonly BOOLEAN_TYPE: number;
+    readonly FIRST_ORDERED_NODE_TYPE: number;
+    readonly NUMBER_TYPE: number;
+    readonly ORDERED_NODE_ITERATOR_TYPE: number;
+    readonly ORDERED_NODE_SNAPSHOT_TYPE: number;
+    readonly STRING_TYPE: number;
+    readonly UNORDERED_NODE_ITERATOR_TYPE: number;
+    readonly UNORDERED_NODE_SNAPSHOT_TYPE: number;
+};
+
+interface XSLTProcessor {
+    clearParameters(): void;
+    getParameter(namespaceURI: string, localName: string): any;
+    importStylesheet(style: Node): void;
+    removeParameter(namespaceURI: string, localName: string): void;
+    reset(): void;
+    setParameter(namespaceURI: string, localName: string, value: any): void;
+    transformToDocument(source: Node): Document;
+    transformToFragment(source: Node, document: Document): DocumentFragment;
+}
+
+declare var XSLTProcessor: {
+    prototype: XSLTProcessor;
+    new(): XSLTProcessor;
+};
+
+interface AbstractWorkerEventMap {
+    "error": ErrorEvent;
+}
+
+interface AbstractWorker {
+    onerror: (this: AbstractWorker, ev: ErrorEvent) => any;
+    addEventListener<K extends keyof AbstractWorkerEventMap>(type: K, listener: (this: AbstractWorker, ev: AbstractWorkerEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+interface Body {
+    readonly bodyUsed: boolean;
+    arrayBuffer(): Promise<ArrayBuffer>;
+    blob(): Promise<Blob>;
+    json(): Promise<any>;
+    text(): Promise<string>;
+    formData(): Promise<FormData>;
+}
+
+interface CanvasPathMethods {
+    arc(x: number, y: number, radius: number, startAngle: number, endAngle: number, anticlockwise?: boolean): void;
+    arcTo(x1: number, y1: number, x2: number, y2: number, radius: number): void;
+    bezierCurveTo(cp1x: number, cp1y: number, cp2x: number, cp2y: number, x: number, y: number): void;
+    closePath(): void;
+    ellipse(x: number, y: number, radiusX: number, radiusY: number, rotation: number, startAngle: number, endAngle: number, anticlockwise?: boolean): void;
+    lineTo(x: number, y: number): void;
+    moveTo(x: number, y: number): void;
+    quadraticCurveTo(cpx: number, cpy: number, x: number, y: number): void;
+    rect(x: number, y: number, w: number, h: number): void;
+}
+
+interface ChildNode {
+    remove(): void;
+}
+
+interface DocumentEvent {
+    createEvent(eventInterface: "AnimationEvent"): AnimationEvent;
+    createEvent(eventInterface: "AudioProcessingEvent"): AudioProcessingEvent;
+    createEvent(eventInterface: "BeforeUnloadEvent"): BeforeUnloadEvent;
+    createEvent(eventInterface: "ClipboardEvent"): ClipboardEvent;
+    createEvent(eventInterface: "CloseEvent"): CloseEvent;
+    createEvent(eventInterface: "CompositionEvent"): CompositionEvent;
+    createEvent(eventInterface: "CustomEvent"): CustomEvent;
+    createEvent(eventInterface: "DeviceLightEvent"): DeviceLightEvent;
+    createEvent(eventInterface: "DeviceMotionEvent"): DeviceMotionEvent;
+    createEvent(eventInterface: "DeviceOrientationEvent"): DeviceOrientationEvent;
+    createEvent(eventInterface: "DragEvent"): DragEvent;
+    createEvent(eventInterface: "ErrorEvent"): ErrorEvent;
+    createEvent(eventInterface: "Event"): Event;
+    createEvent(eventInterface: "Events"): Event;
+    createEvent(eventInterface: "FocusEvent"): FocusEvent;
+    createEvent(eventInterface: "FocusNavigationEvent"): FocusNavigationEvent;
+    createEvent(eventInterface: "GamepadEvent"): GamepadEvent;
+    createEvent(eventInterface: "HashChangeEvent"): HashChangeEvent;
+    createEvent(eventInterface: "IDBVersionChangeEvent"): IDBVersionChangeEvent;
+    createEvent(eventInterface: "KeyboardEvent"): KeyboardEvent;
+    createEvent(eventInterface: "ListeningStateChangedEvent"): ListeningStateChangedEvent;
+    createEvent(eventInterface: "LongRunningScriptDetectedEvent"): LongRunningScriptDetectedEvent;
+    createEvent(eventInterface: "MSGestureEvent"): MSGestureEvent;
+    createEvent(eventInterface: "MSManipulationEvent"): MSManipulationEvent;
+    createEvent(eventInterface: "MSMediaKeyMessageEvent"): MSMediaKeyMessageEvent;
+    createEvent(eventInterface: "MSMediaKeyNeededEvent"): MSMediaKeyNeededEvent;
+    createEvent(eventInterface: "MSPointerEvent"): MSPointerEvent;
+    createEvent(eventInterface: "MSSiteModeEvent"): MSSiteModeEvent;
+    createEvent(eventInterface: "MediaEncryptedEvent"): MediaEncryptedEvent;
+    createEvent(eventInterface: "MediaKeyMessageEvent"): MediaKeyMessageEvent;
+    createEvent(eventInterface: "MediaStreamErrorEvent"): MediaStreamErrorEvent;
+    createEvent(eventInterface: "MediaStreamEvent"): MediaStreamEvent;
+    createEvent(eventInterface: "MediaStreamTrackEvent"): MediaStreamTrackEvent;
+    createEvent(eventInterface: "MessageEvent"): MessageEvent;
+    createEvent(eventInterface: "MouseEvent"): MouseEvent;
+    createEvent(eventInterface: "MouseEvents"): MouseEvent;
+    createEvent(eventInterface: "MutationEvent"): MutationEvent;
+    createEvent(eventInterface: "MutationEvents"): MutationEvent;
+    createEvent(eventInterface: "NavigationCompletedEvent"): NavigationCompletedEvent;
+    createEvent(eventInterface: "NavigationEvent"): NavigationEvent;
+    createEvent(eventInterface: "NavigationEventWithReferrer"): NavigationEventWithReferrer;
+    createEvent(eventInterface: "OfflineAudioCompletionEvent"): OfflineAudioCompletionEvent;
+    createEvent(eventInterface: "OverflowEvent"): OverflowEvent;
+    createEvent(eventInterface: "PageTransitionEvent"): PageTransitionEvent;
+    createEvent(eventInterface: "PaymentRequestUpdateEvent"): PaymentRequestUpdateEvent;
+    createEvent(eventInterface: "PermissionRequestedEvent"): PermissionRequestedEvent;
+    createEvent(eventInterface: "PointerEvent"): PointerEvent;
+    createEvent(eventInterface: "PopStateEvent"): PopStateEvent;
+    createEvent(eventInterface: "ProgressEvent"): ProgressEvent;
+    createEvent(eventInterface: "RTCDTMFToneChangeEvent"): RTCDTMFToneChangeEvent;
+    createEvent(eventInterface: "RTCDtlsTransportStateChangedEvent"): RTCDtlsTransportStateChangedEvent;
+    createEvent(eventInterface: "RTCIceCandidatePairChangedEvent"): RTCIceCandidatePairChangedEvent;
+    createEvent(eventInterface: "RTCIceGathererEvent"): RTCIceGathererEvent;
+    createEvent(eventInterface: "RTCIceTransportStateChangedEvent"): RTCIceTransportStateChangedEvent;
+    createEvent(eventInterface: "RTCPeerConnectionIceEvent"): RTCPeerConnectionIceEvent;
+    createEvent(eventInterface: "RTCSsrcConflictEvent"): RTCSsrcConflictEvent;
+    createEvent(eventInterface: "SVGZoomEvent"): SVGZoomEvent;
+    createEvent(eventInterface: "SVGZoomEvents"): SVGZoomEvent;
+    createEvent(eventInterface: "ScriptNotifyEvent"): ScriptNotifyEvent;
+    createEvent(eventInterface: "ServiceWorkerMessageEvent"): ServiceWorkerMessageEvent;
+    createEvent(eventInterface: "SpeechSynthesisEvent"): SpeechSynthesisEvent;
+    createEvent(eventInterface: "StorageEvent"): StorageEvent;
+    createEvent(eventInterface: "TextEvent"): TextEvent;
+    createEvent(eventInterface: "TouchEvent"): TouchEvent;
+    createEvent(eventInterface: "TrackEvent"): TrackEvent;
+    createEvent(eventInterface: "TransitionEvent"): TransitionEvent;
+    createEvent(eventInterface: "UIEvent"): UIEvent;
+    createEvent(eventInterface: "UIEvents"): UIEvent;
+    createEvent(eventInterface: "UnviewableContentIdentifiedEvent"): UnviewableContentIdentifiedEvent;
+    createEvent(eventInterface: "WebGLContextEvent"): WebGLContextEvent;
+    createEvent(eventInterface: "WheelEvent"): WheelEvent;
+    createEvent(eventInterface: string): Event;
+}
+
+interface DOML2DeprecatedColorProperty {
+    color: string;
+}
+
+interface DOML2DeprecatedSizeProperty {
+    size: number;
+}
+
+interface ElementTraversal {
+    readonly childElementCount: number;
+    readonly firstElementChild: Element | null;
+    readonly lastElementChild: Element | null;
+    readonly nextElementSibling: Element | null;
+    readonly previousElementSibling: Element | null;
+}
+
+interface GetSVGDocument {
+    getSVGDocument(): Document;
+}
+
+interface GlobalEventHandlersEventMap {
+    "pointercancel": PointerEvent;
+    "pointerdown": PointerEvent;
+    "pointerenter": PointerEvent;
+    "pointerleave": PointerEvent;
+    "pointermove": PointerEvent;
+    "pointerout": PointerEvent;
+    "pointerover": PointerEvent;
+    "pointerup": PointerEvent;
+    "wheel": WheelEvent;
+}
+
+interface GlobalEventHandlers {
+    onpointercancel: (this: GlobalEventHandlers, ev: PointerEvent) => any;
+    onpointerdown: (this: GlobalEventHandlers, ev: PointerEvent) => any;
+    onpointerenter: (this: GlobalEventHandlers, ev: PointerEvent) => any;
+    onpointerleave: (this: GlobalEventHandlers, ev: PointerEvent) => any;
+    onpointermove: (this: GlobalEventHandlers, ev: PointerEvent) => any;
+    onpointerout: (this: GlobalEventHandlers, ev: PointerEvent) => any;
+    onpointerover: (this: GlobalEventHandlers, ev: PointerEvent) => any;
+    onpointerup: (this: GlobalEventHandlers, ev: PointerEvent) => any;
+    onwheel: (this: GlobalEventHandlers, ev: WheelEvent) => any;
+    addEventListener<K extends keyof GlobalEventHandlersEventMap>(type: K, listener: (this: GlobalEventHandlers, ev: GlobalEventHandlersEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+interface GlobalFetch {
+    fetch(input: RequestInfo, init?: RequestInit): Promise<Response>;
+}
+
+interface HTMLTableAlignment {
+    /**
+     * Sets or retrieves a value that you can use to implement your own ch functionality for the object.
+     */
+    ch: string;
+    /**
+     * Sets or retrieves a value that you can use to implement your own chOff functionality for the object.
+     */
+    chOff: string;
+    /**
+     * Sets or retrieves how text and other content are vertically aligned within the object that contains them.
+     */
+    vAlign: string;
+}
+
+interface IDBEnvironment {
+    readonly indexedDB: IDBFactory;
+}
+
+interface LinkStyle {
+    readonly sheet: StyleSheet;
+}
+
+interface MSBaseReaderEventMap {
+    "abort": Event;
+    "error": ErrorEvent;
+    "load": Event;
+    "loadend": ProgressEvent;
+    "loadstart": Event;
+    "progress": ProgressEvent;
+}
+
+interface MSBaseReader {
+    onabort: (this: MSBaseReader, ev: Event) => any;
+    onerror: (this: MSBaseReader, ev: ErrorEvent) => any;
+    onload: (this: MSBaseReader, ev: Event) => any;
+    onloadend: (this: MSBaseReader, ev: ProgressEvent) => any;
+    onloadstart: (this: MSBaseReader, ev: Event) => any;
+    onprogress: (this: MSBaseReader, ev: ProgressEvent) => any;
+    readonly readyState: number;
+    readonly result: any;
+    abort(): void;
+    readonly DONE: number;
+    readonly EMPTY: number;
+    readonly LOADING: number;
+    addEventListener<K extends keyof MSBaseReaderEventMap>(type: K, listener: (this: MSBaseReader, ev: MSBaseReaderEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+interface MSFileSaver {
+    msSaveBlob(blob: any, defaultName?: string): boolean;
+    msSaveOrOpenBlob(blob: any, defaultName?: string): boolean;
+}
+
+interface MSNavigatorDoNotTrack {
+    confirmSiteSpecificTrackingException(args: ConfirmSiteSpecificExceptionsInformation): boolean;
+    confirmWebWideTrackingException(args: ExceptionInformation): boolean;
+    removeSiteSpecificTrackingException(args: ExceptionInformation): void;
+    removeWebWideTrackingException(args: ExceptionInformation): void;
+    storeSiteSpecificTrackingException(args: StoreSiteSpecificExceptionsInformation): void;
+    storeWebWideTrackingException(args: StoreExceptionsInformation): void;
+}
+
+interface NavigatorBeacon {
+    sendBeacon(url: USVString, data?: BodyInit): boolean;
+}
+
+interface NavigatorConcurrentHardware {
+    readonly hardwareConcurrency: number;
+}
+
+interface NavigatorContentUtils {
+}
+
+interface NavigatorGeolocation {
+    readonly geolocation: Geolocation;
+}
+
+interface NavigatorID {
+    readonly appCodeName: string;
+    readonly appName: string;
+    readonly appVersion: string;
+    readonly platform: string;
+    readonly product: string;
+    readonly productSub: string;
+    readonly userAgent: string;
+    readonly vendor: string;
+    readonly vendorSub: string;
+}
+
+interface NavigatorOnLine {
+    readonly onLine: boolean;
+}
+
+interface NavigatorStorageUtils {
+}
+
+interface NavigatorUserMedia {
+    readonly mediaDevices: MediaDevices;
+    getUserMedia(constraints: MediaStreamConstraints, successCallback: NavigatorUserMediaSuccessCallback, errorCallback: NavigatorUserMediaErrorCallback): void;
+}
+
+interface NodeSelector {
+    querySelector<K extends keyof ElementTagNameMap>(selectors: K): ElementTagNameMap[K] | null;
+    querySelector(selectors: string): Element | null;
+    querySelectorAll<K extends keyof ElementListTagNameMap>(selectors: K): ElementListTagNameMap[K];
+    querySelectorAll(selectors: string): NodeListOf<Element>;
+}
+
+interface RandomSource {
+    getRandomValues(array: ArrayBufferView): ArrayBufferView;
+}
+
+interface SVGAnimatedPoints {
+    readonly animatedPoints: SVGPointList;
+    readonly points: SVGPointList;
+}
+
+interface SVGFilterPrimitiveStandardAttributes {
+    readonly height: SVGAnimatedLength;
+    readonly result: SVGAnimatedString;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+}
+
+interface SVGFitToViewBox {
+    readonly preserveAspectRatio: SVGAnimatedPreserveAspectRatio;
+    readonly viewBox: SVGAnimatedRect;
+}
+
+interface SVGTests {
+    readonly requiredExtensions: SVGStringList;
+    readonly requiredFeatures: SVGStringList;
+    readonly systemLanguage: SVGStringList;
+    hasExtension(extension: string): boolean;
+}
+
+interface SVGURIReference {
+    readonly href: SVGAnimatedString;
+}
+
+interface WindowBase64 {
+    atob(encodedString: string): string;
+    btoa(rawString: string): string;
+}
+
+interface WindowConsole {
+    readonly console: Console;
+}
+
+interface WindowLocalStorage {
+    readonly localStorage: Storage;
+}
+
+interface WindowSessionStorage {
+    readonly sessionStorage: Storage;
+}
+
+interface WindowTimers extends Object, WindowTimersExtension {
+    clearInterval(handle: number): void;
+    clearTimeout(handle: number): void;
+    setInterval(handler: (...args: any[]) => void, timeout: number): number;
+    setInterval(handler: any, timeout?: any, ...args: any[]): number;
+    setTimeout(handler: (...args: any[]) => void, timeout: number): number;
+    setTimeout(handler: any, timeout?: any, ...args: any[]): number;
+}
+
+interface WindowTimersExtension {
+    clearImmediate(handle: number): void;
+    setImmediate(handler: (...args: any[]) => void): number;
+    setImmediate(handler: any, ...args: any[]): number;
+}
+
+interface XMLHttpRequestEventTargetEventMap {
+    "abort": Event;
+    "error": ErrorEvent;
+    "load": Event;
+    "loadend": ProgressEvent;
+    "loadstart": Event;
+    "progress": ProgressEvent;
+    "timeout": ProgressEvent;
+}
+
+interface XMLHttpRequestEventTarget {
+    onabort: (this: XMLHttpRequestEventTarget, ev: Event) => any;
+    onerror: (this: XMLHttpRequestEventTarget, ev: ErrorEvent) => any;
+    onload: (this: XMLHttpRequestEventTarget, ev: Event) => any;
+    onloadend: (this: XMLHttpRequestEventTarget, ev: ProgressEvent) => any;
+    onloadstart: (this: XMLHttpRequestEventTarget, ev: Event) => any;
+    onprogress: (this: XMLHttpRequestEventTarget, ev: ProgressEvent) => any;
+    ontimeout: (this: XMLHttpRequestEventTarget, ev: ProgressEvent) => any;
+    addEventListener<K extends keyof XMLHttpRequestEventTargetEventMap>(type: K, listener: (this: XMLHttpRequestEventTarget, ev: XMLHttpRequestEventTargetEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+interface ErrorEventInit {
+    message?: string;
+    filename?: string;
+    lineno?: number;
+    conlno?: number;
+    error?: any;
+}
+
+interface StorageEventInit extends EventInit {
+    key?: string;
+    oldValue?: string;
+    newValue?: string;
+    url: string;
+    storageArea?: Storage;
+}
+
+interface Canvas2DContextAttributes {
+    alpha?: boolean;
+    willReadFrequently?: boolean;
+    storage?: boolean;
+    [attribute: string]: boolean | string | undefined;
+}
+
+interface ImageBitmapOptions {
+    imageOrientation?: "none" | "flipY";
+    premultiplyAlpha?: "none" | "premultiply" | "default";
+    colorSpaceConversion?: "none" | "default";
+    resizeWidth?: number;
+    resizeHeight?: number;
+    resizeQuality?: "pixelated" | "low" | "medium" | "high";
+}
+
+interface ImageBitmap {
+    readonly width: number;
+    readonly height: number;
+    close(): void;
+}
+
+interface URLSearchParams {
+    /**
+     * Appends a specified key/value pair as a new search parameter.
+     */
+    append(name: string, value: string): void;
+    /**
+     * Deletes the given search parameter, and its associated value, from the list of all search parameters.
+     */
+    delete(name: string): void;
+    /**
+     * Returns the first value associated to the given search parameter.
+     */
+    get(name: string): string | null;
+    /**
+     * Returns all the values association with a given search parameter.
+     */
+    getAll(name: string): string[];
+    /**
+     * Returns a Boolean indicating if such a search parameter exists.
+     */
+    has(name: string): boolean;
+    /**
+     * Sets the value associated to a given search parameter to the given value. If there were several values, delete the others.
+     */
+    set(name: string, value: string): void;
+}
+
+declare var URLSearchParams: {
+    prototype: URLSearchParams;
+    /**
+     * Constructor returning a URLSearchParams object.
+     */
+    new (init?: string | URLSearchParams): URLSearchParams;
+};
+
+interface NodeListOf<TNode extends Node> extends NodeList {
+    length: number;
+    item(index: number): TNode;
+    [index: number]: TNode;
+}
+
+interface HTMLCollectionOf<T extends Element> extends HTMLCollection {
+    item(index: number): T;
+    namedItem(name: string): T;
+    [index: number]: T;
+}
+
+interface BlobPropertyBag {
+    type?: string;
+    endings?: string;
+}
+
+interface FilePropertyBag {
+    type?: string;
+    lastModified?: number;
+}
+
+interface EventListenerObject {
+    handleEvent(evt: Event): void;
+}
+
+interface ProgressEventInit extends EventInit {
+    lengthComputable?: boolean;
+    loaded?: number;
+    total?: number;
+}
+
+interface ScrollOptions {
+    behavior?: ScrollBehavior;
+}
+
+interface ScrollToOptions extends ScrollOptions {
+    left?: number;
+    top?: number;
+}
+
+interface ScrollIntoViewOptions extends ScrollOptions {
+    block?: ScrollLogicalPosition;
+    inline?: ScrollLogicalPosition;
+}
+
+interface ClipboardEventInit extends EventInit {
+    data?: string;
+    dataType?: string;
+}
+
+interface IDBArrayKey extends Array<IDBValidKey> {
+}
+
+interface RsaKeyGenParams extends Algorithm {
+    modulusLength: number;
+    publicExponent: Uint8Array;
+}
+
+interface RsaHashedKeyGenParams extends RsaKeyGenParams {
+    hash: AlgorithmIdentifier;
+}
+
+interface RsaKeyAlgorithm extends KeyAlgorithm {
+    modulusLength: number;
+    publicExponent: Uint8Array;
+}
+
+interface RsaHashedKeyAlgorithm extends RsaKeyAlgorithm {
+    hash: AlgorithmIdentifier;
+}
+
+interface RsaHashedImportParams {
+    hash: AlgorithmIdentifier;
+}
+
+interface RsaPssParams {
+    saltLength: number;
+}
+
+interface RsaOaepParams extends Algorithm {
+    label?: BufferSource;
+}
+
+interface EcdsaParams extends Algorithm {
+    hash: AlgorithmIdentifier;
+}
+
+interface EcKeyGenParams extends Algorithm {
+    namedCurve: string;
+}
+
+interface EcKeyAlgorithm extends KeyAlgorithm {
+    typedCurve: string;
+}
+
+interface EcKeyImportParams {
+    namedCurve: string;
+}
+
+interface EcdhKeyDeriveParams extends Algorithm {
+    public: CryptoKey;
+}
+
+interface AesCtrParams extends Algorithm {
+    counter: BufferSource;
+    length: number;
+}
+
+interface AesKeyAlgorithm extends KeyAlgorithm {
+    length: number;
+}
+
+interface AesKeyGenParams extends Algorithm {
+    length: number;
+}
+
+interface AesDerivedKeyParams extends Algorithm {
+    length: number;
+}
+
+interface AesCbcParams extends Algorithm {
+    iv: BufferSource;
+}
+
+interface AesCmacParams extends Algorithm {
+    length: number;
+}
+
+interface AesGcmParams extends Algorithm {
+    iv: BufferSource;
+    additionalData?: BufferSource;
+    tagLength?: number;
+}
+
+interface AesCfbParams extends Algorithm {
+    iv: BufferSource;
+}
+
+interface HmacImportParams extends Algorithm {
+    hash?: AlgorithmIdentifier;
+    length?: number;
+}
+
+interface HmacKeyAlgorithm extends KeyAlgorithm {
+    hash: AlgorithmIdentifier;
+    length: number;
+}
+
+interface HmacKeyGenParams extends Algorithm {
+    hash: AlgorithmIdentifier;
+    length?: number;
+}
+
+interface DhKeyGenParams extends Algorithm {
+    prime: Uint8Array;
+    generator: Uint8Array;
+}
+
+interface DhKeyAlgorithm extends KeyAlgorithm {
+    prime: Uint8Array;
+    generator: Uint8Array;
+}
+
+interface DhKeyDeriveParams extends Algorithm {
+    public: CryptoKey;
+}
+
+interface DhImportKeyParams extends Algorithm {
+    prime: Uint8Array;
+    generator: Uint8Array;
+}
+
+interface ConcatParams extends Algorithm {
+    hash?: AlgorithmIdentifier;
+    algorithmId: Uint8Array;
+    partyUInfo: Uint8Array;
+    partyVInfo: Uint8Array;
+    publicInfo?: Uint8Array;
+    privateInfo?: Uint8Array;
+}
+
+interface HkdfCtrParams extends Algorithm {
+    hash: AlgorithmIdentifier;
+    label: BufferSource;
+    context: BufferSource;
+}
+
+interface Pbkdf2Params extends Algorithm {
+    salt: BufferSource;
+    iterations: number;
+    hash: AlgorithmIdentifier;
+}
+
+interface RsaOtherPrimesInfo {
+    r: string;
+    d: string;
+    t: string;
+}
+
+interface JsonWebKey {
+    kty: string;
+    use?: string;
+    key_ops?: string[];
+    alg?: string;
+    kid?: string;
+    x5u?: string;
+    x5c?: string;
+    x5t?: string;
+    ext?: boolean;
+    crv?: string;
+    x?: string;
+    y?: string;
+    d?: string;
+    n?: string;
+    e?: string;
+    p?: string;
+    q?: string;
+    dp?: string;
+    dq?: string;
+    qi?: string;
+    oth?: RsaOtherPrimesInfo[];
+    k?: string;
+}
+
+interface ParentNode {
+    readonly children: HTMLCollection;
+    readonly firstElementChild: Element | null;
+    readonly lastElementChild: Element | null;
+    readonly childElementCount: number;
+}
+
+interface DocumentOrShadowRoot {
+    readonly activeElement: Element | null;
+    readonly stylesheets: StyleSheetList;
+    getSelection(): Selection | null;
+    elementFromPoint(x: number, y: number): Element | null;
+    elementsFromPoint(x: number, y: number): Element[];
+}
+
+interface ShadowRoot extends DocumentOrShadowRoot, DocumentFragment {
+    readonly host: Element;
+    innerHTML: string;
+}
+
+interface ShadowRootInit {
+    mode: "open" | "closed";
+    delegatesFocus?: boolean;
+}
+
+interface HTMLSlotElement extends HTMLElement {
+    name: string;
+    assignedNodes(options?: AssignedNodesOptions): Node[];
+}
+
+interface AssignedNodesOptions {
+    flatten?: boolean;
+}
+
+interface ElementDefinitionOptions {
+    extends: string;
+}
+
+interface CustomElementRegistry {
+    define(name: string, constructor: Function, options?: ElementDefinitionOptions): void;
+    get(name: string): any;
+    whenDefined(name: string): PromiseLike<void>;
+}
+
+interface PromiseRejectionEvent extends Event {
+    readonly promise: PromiseLike<any>;
+    readonly reason: any;
+}
+
+interface PromiseRejectionEventInit extends EventInit {
+    promise: PromiseLike<any>;
+    reason?: any;
+}
+
+interface EventListenerOptions {
+    capture?: boolean;
+}
+
+interface AddEventListenerOptions extends EventListenerOptions {
+    passive?: boolean;
+    once?: boolean;
+}
+
+interface TouchEventInit extends EventModifierInit {
+    touches?: Touch[];
+    targetTouches?: Touch[];
+    changedTouches?: Touch[];
+}
+
+declare type EventListenerOrEventListenerObject = EventListener | EventListenerObject;
+
+interface DecodeErrorCallback {
+    (error: DOMException): void;
+}
+interface DecodeSuccessCallback {
+    (decodedData: AudioBuffer): void;
+}
+interface ErrorEventHandler {
+    (message: string, filename?: string, lineno?: number, colno?: number, error?: Error): void;
+}
+interface ForEachCallback {
+    (keyId: any, status: MediaKeyStatus): void;
+}
+interface FrameRequestCallback {
+    (time: number): void;
+}
+interface FunctionStringCallback {
+    (data: string): void;
+}
+interface IntersectionObserverCallback {
+    (entries: IntersectionObserverEntry[], observer: IntersectionObserver): void;
+}
+interface MediaQueryListListener {
+    (mql: MediaQueryList): void;
+}
+interface MSExecAtPriorityFunctionCallback {
+    (...args: any[]): any;
+}
+interface MSLaunchUriCallback {
+    (): void;
+}
+interface MSUnsafeFunctionCallback {
+    (): any;
+}
+interface MutationCallback {
+    (mutations: MutationRecord[], observer: MutationObserver): void;
+}
+interface NavigatorUserMediaErrorCallback {
+    (error: MediaStreamError): void;
+}
+interface NavigatorUserMediaSuccessCallback {
+    (stream: MediaStream): void;
+}
+interface NotificationPermissionCallback {
+    (permission: NotificationPermission): void;
+}
+interface PositionCallback {
+    (position: Position): void;
+}
+interface PositionErrorCallback {
+    (error: PositionError): void;
+}
+interface RTCPeerConnectionErrorCallback {
+    (error: DOMError): void;
+}
+interface RTCSessionDescriptionCallback {
+    (sdp: RTCSessionDescription): void;
+}
+interface RTCStatsCallback {
+    (report: RTCStatsReport): void;
+}
+interface VoidFunction {
+    (): void;
+}
+interface HTMLElementTagNameMap {
+    "a": HTMLAnchorElement;
+    "applet": HTMLAppletElement;
+    "area": HTMLAreaElement;
+    "audio": HTMLAudioElement;
+    "base": HTMLBaseElement;
+    "basefont": HTMLBaseFontElement;
+    "blockquote": HTMLQuoteElement;
+    "body": HTMLBodyElement;
+    "br": HTMLBRElement;
+    "button": HTMLButtonElement;
+    "canvas": HTMLCanvasElement;
+    "caption": HTMLTableCaptionElement;
+    "col": HTMLTableColElement;
+    "colgroup": HTMLTableColElement;
+    "data": HTMLDataElement;
+    "datalist": HTMLDataListElement;
+    "del": HTMLModElement;
+    "dir": HTMLDirectoryElement;
+    "div": HTMLDivElement;
+    "dl": HTMLDListElement;
+    "embed": HTMLEmbedElement;
+    "fieldset": HTMLFieldSetElement;
+    "font": HTMLFontElement;
+    "form": HTMLFormElement;
+    "frame": HTMLFrameElement;
+    "frameset": HTMLFrameSetElement;
+    "h1": HTMLHeadingElement;
+    "h2": HTMLHeadingElement;
+    "h3": HTMLHeadingElement;
+    "h4": HTMLHeadingElement;
+    "h5": HTMLHeadingElement;
+    "h6": HTMLHeadingElement;
+    "head": HTMLHeadElement;
+    "hr": HTMLHRElement;
+    "html": HTMLHtmlElement;
+    "iframe": HTMLIFrameElement;
+    "img": HTMLImageElement;
+    "input": HTMLInputElement;
+    "ins": HTMLModElement;
+    "isindex": HTMLUnknownElement;
+    "label": HTMLLabelElement;
+    "legend": HTMLLegendElement;
+    "li": HTMLLIElement;
+    "link": HTMLLinkElement;
+    "listing": HTMLPreElement;
+    "map": HTMLMapElement;
+    "marquee": HTMLMarqueeElement;
+    "menu": HTMLMenuElement;
+    "meta": HTMLMetaElement;
+    "meter": HTMLMeterElement;
+    "nextid": HTMLUnknownElement;
+    "object": HTMLObjectElement;
+    "ol": HTMLOListElement;
+    "optgroup": HTMLOptGroupElement;
+    "option": HTMLOptionElement;
+    "output": HTMLOutputElement;
+    "p": HTMLParagraphElement;
+    "param": HTMLParamElement;
+    "picture": HTMLPictureElement;
+    "pre": HTMLPreElement;
+    "progress": HTMLProgressElement;
+    "q": HTMLQuoteElement;
+    "script": HTMLScriptElement;
+    "select": HTMLSelectElement;
+    "source": HTMLSourceElement;
+    "span": HTMLSpanElement;
+    "style": HTMLStyleElement;
+    "table": HTMLTableElement;
+    "tbody": HTMLTableSectionElement;
+    "td": HTMLTableDataCellElement;
+    "template": HTMLTemplateElement;
+    "textarea": HTMLTextAreaElement;
+    "tfoot": HTMLTableSectionElement;
+    "th": HTMLTableHeaderCellElement;
+    "thead": HTMLTableSectionElement;
+    "time": HTMLTimeElement;
+    "title": HTMLTitleElement;
+    "tr": HTMLTableRowElement;
+    "track": HTMLTrackElement;
+    "ul": HTMLUListElement;
+    "video": HTMLVideoElement;
+    "x-ms-webview": MSHTMLWebViewElement;
+    "xmp": HTMLPreElement;
+}
+
+interface ElementTagNameMap extends HTMLElementTagNameMap {
+    "abbr": HTMLElement;
+    "acronym": HTMLElement;
+    "address": HTMLElement;
+    "article": HTMLElement;
+    "aside": HTMLElement;
+    "b": HTMLElement;
+    "bdo": HTMLElement;
+    "big": HTMLElement;
+    "center": HTMLElement;
+    "circle": SVGCircleElement;
+    "cite": HTMLElement;
+    "clippath": SVGClipPathElement;
+    "code": HTMLElement;
+    "dd": HTMLElement;
+    "defs": SVGDefsElement;
+    "desc": SVGDescElement;
+    "dfn": HTMLElement;
+    "dt": HTMLElement;
+    "ellipse": SVGEllipseElement;
+    "em": HTMLElement;
+    "feblend": SVGFEBlendElement;
+    "fecolormatrix": SVGFEColorMatrixElement;
+    "fecomponenttransfer": SVGFEComponentTransferElement;
+    "fecomposite": SVGFECompositeElement;
+    "feconvolvematrix": SVGFEConvolveMatrixElement;
+    "fediffuselighting": SVGFEDiffuseLightingElement;
+    "fedisplacementmap": SVGFEDisplacementMapElement;
+    "fedistantlight": SVGFEDistantLightElement;
+    "feflood": SVGFEFloodElement;
+    "fefunca": SVGFEFuncAElement;
+    "fefuncb": SVGFEFuncBElement;
+    "fefuncg": SVGFEFuncGElement;
+    "fefuncr": SVGFEFuncRElement;
+    "fegaussianblur": SVGFEGaussianBlurElement;
+    "feimage": SVGFEImageElement;
+    "femerge": SVGFEMergeElement;
+    "femergenode": SVGFEMergeNodeElement;
+    "femorphology": SVGFEMorphologyElement;
+    "feoffset": SVGFEOffsetElement;
+    "fepointlight": SVGFEPointLightElement;
+    "fespecularlighting": SVGFESpecularLightingElement;
+    "fespotlight": SVGFESpotLightElement;
+    "fetile": SVGFETileElement;
+    "feturbulence": SVGFETurbulenceElement;
+    "figcaption": HTMLElement;
+    "figure": HTMLElement;
+    "filter": SVGFilterElement;
+    "footer": HTMLElement;
+    "foreignobject": SVGForeignObjectElement;
+    "g": SVGGElement;
+    "header": HTMLElement;
+    "hgroup": HTMLElement;
+    "i": HTMLElement;
+    "image": SVGImageElement;
+    "kbd": HTMLElement;
+    "keygen": HTMLElement;
+    "line": SVGLineElement;
+    "lineargradient": SVGLinearGradientElement;
+    "mark": HTMLElement;
+    "marker": SVGMarkerElement;
+    "mask": SVGMaskElement;
+    "metadata": SVGMetadataElement;
+    "nav": HTMLElement;
+    "nobr": HTMLElement;
+    "noframes": HTMLElement;
+    "noscript": HTMLElement;
+    "path": SVGPathElement;
+    "pattern": SVGPatternElement;
+    "plaintext": HTMLElement;
+    "polygon": SVGPolygonElement;
+    "polyline": SVGPolylineElement;
+    "radialgradient": SVGRadialGradientElement;
+    "rect": SVGRectElement;
+    "rt": HTMLElement;
+    "ruby": HTMLElement;
+    "s": HTMLElement;
+    "samp": HTMLElement;
+    "section": HTMLElement;
+    "small": HTMLElement;
+    "stop": SVGStopElement;
+    "strike": HTMLElement;
+    "strong": HTMLElement;
+    "sub": HTMLElement;
+    "sup": HTMLElement;
+    "svg": SVGSVGElement;
+    "switch": SVGSwitchElement;
+    "symbol": SVGSymbolElement;
+    "text": SVGTextElement;
+    "textpath": SVGTextPathElement;
+    "tspan": SVGTSpanElement;
+    "tt": HTMLElement;
+    "u": HTMLElement;
+    "use": SVGUseElement;
+    "var": HTMLElement;
+    "view": SVGViewElement;
+    "wbr": HTMLElement;
+}
+
+type ElementListTagNameMap = {
+    [key in keyof ElementTagNameMap]: NodeListOf<ElementTagNameMap[key]>
+};
+
+declare var Audio: { new(src?: string): HTMLAudioElement; };
+declare var Image: { new(width?: number, height?: number): HTMLImageElement; };
+declare var Option: { new(text?: string, value?: string, defaultSelected?: boolean, selected?: boolean): HTMLOptionElement; };
+declare var applicationCache: ApplicationCache;
+declare var caches: CacheStorage;
+declare var clientInformation: Navigator;
+declare var closed: boolean;
+declare var crypto: Crypto;
+declare var defaultStatus: string;
+declare var devicePixelRatio: number;
+declare var document: Document;
+declare var doNotTrack: string;
+declare var event: Event | undefined;
+declare var external: External;
+declare var frameElement: Element;
+declare var frames: Window;
+declare var history: History;
+declare var innerHeight: number;
+declare var innerWidth: number;
+declare var isSecureContext: boolean;
+declare var length: number;
+declare var location: Location;
+declare var locationbar: BarProp;
+declare var menubar: BarProp;
+declare var msContentScript: ExtensionScriptApis;
+declare var msCredentials: MSCredentials;
+declare const name: never;
+declare var navigator: Navigator;
+declare var offscreenBuffering: string | boolean;
+declare var onabort: (this: Window, ev: UIEvent) => any;
+declare var onafterprint: (this: Window, ev: Event) => any;
+declare var onbeforeprint: (this: Window, ev: Event) => any;
+declare var onbeforeunload: (this: Window, ev: BeforeUnloadEvent) => any;
+declare var onblur: (this: Window, ev: FocusEvent) => any;
+declare var oncanplay: (this: Window, ev: Event) => any;
+declare var oncanplaythrough: (this: Window, ev: Event) => any;
+declare var onchange: (this: Window, ev: Event) => any;
+declare var onclick: (this: Window, ev: MouseEvent) => any;
+declare var oncompassneedscalibration: (this: Window, ev: Event) => any;
+declare var oncontextmenu: (this: Window, ev: PointerEvent) => any;
+declare var ondblclick: (this: Window, ev: MouseEvent) => any;
+declare var ondevicelight: (this: Window, ev: DeviceLightEvent) => any;
+declare var ondevicemotion: (this: Window, ev: DeviceMotionEvent) => any;
+declare var ondeviceorientation: (this: Window, ev: DeviceOrientationEvent) => any;
+declare var ondrag: (this: Window, ev: DragEvent) => any;
+declare var ondragend: (this: Window, ev: DragEvent) => any;
+declare var ondragenter: (this: Window, ev: DragEvent) => any;
+declare var ondragleave: (this: Window, ev: DragEvent) => any;
+declare var ondragover: (this: Window, ev: DragEvent) => any;
+declare var ondragstart: (this: Window, ev: DragEvent) => any;
+declare var ondrop: (this: Window, ev: DragEvent) => any;
+declare var ondurationchange: (this: Window, ev: Event) => any;
+declare var onemptied: (this: Window, ev: Event) => any;
+declare var onended: (this: Window, ev: MediaStreamErrorEvent) => any;
+declare var onerror: ErrorEventHandler;
+declare var onfocus: (this: Window, ev: FocusEvent) => any;
+declare var onhashchange: (this: Window, ev: HashChangeEvent) => any;
+declare var oninput: (this: Window, ev: Event) => any;
+declare var oninvalid: (this: Window, ev: Event) => any;
+declare var onkeydown: (this: Window, ev: KeyboardEvent) => any;
+declare var onkeypress: (this: Window, ev: KeyboardEvent) => any;
+declare var onkeyup: (this: Window, ev: KeyboardEvent) => any;
+declare var onload: (this: Window, ev: Event) => any;
+declare var onloadeddata: (this: Window, ev: Event) => any;
+declare var onloadedmetadata: (this: Window, ev: Event) => any;
+declare var onloadstart: (this: Window, ev: Event) => any;
+declare var onmessage: (this: Window, ev: MessageEvent) => any;
+declare var onmousedown: (this: Window, ev: MouseEvent) => any;
+declare var onmouseenter: (this: Window, ev: MouseEvent) => any;
+declare var onmouseleave: (this: Window, ev: MouseEvent) => any;
+declare var onmousemove: (this: Window, ev: MouseEvent) => any;
+declare var onmouseout: (this: Window, ev: MouseEvent) => any;
+declare var onmouseover: (this: Window, ev: MouseEvent) => any;
+declare var onmouseup: (this: Window, ev: MouseEvent) => any;
+declare var onmousewheel: (this: Window, ev: WheelEvent) => any;
+declare var onmsgesturechange: (this: Window, ev: MSGestureEvent) => any;
+declare var onmsgesturedoubletap: (this: Window, ev: MSGestureEvent) => any;
+declare var onmsgestureend: (this: Window, ev: MSGestureEvent) => any;
+declare var onmsgesturehold: (this: Window, ev: MSGestureEvent) => any;
+declare var onmsgesturestart: (this: Window, ev: MSGestureEvent) => any;
+declare var onmsgesturetap: (this: Window, ev: MSGestureEvent) => any;
+declare var onmsinertiastart: (this: Window, ev: MSGestureEvent) => any;
+declare var onmspointercancel: (this: Window, ev: MSPointerEvent) => any;
+declare var onmspointerdown: (this: Window, ev: MSPointerEvent) => any;
+declare var onmspointerenter: (this: Window, ev: MSPointerEvent) => any;
+declare var onmspointerleave: (this: Window, ev: MSPointerEvent) => any;
+declare var onmspointermove: (this: Window, ev: MSPointerEvent) => any;
+declare var onmspointerout: (this: Window, ev: MSPointerEvent) => any;
+declare var onmspointerover: (this: Window, ev: MSPointerEvent) => any;
+declare var onmspointerup: (this: Window, ev: MSPointerEvent) => any;
+declare var onoffline: (this: Window, ev: Event) => any;
+declare var ononline: (this: Window, ev: Event) => any;
+declare var onorientationchange: (this: Window, ev: Event) => any;
+declare var onpagehide: (this: Window, ev: PageTransitionEvent) => any;
+declare var onpageshow: (this: Window, ev: PageTransitionEvent) => any;
+declare var onpause: (this: Window, ev: Event) => any;
+declare var onplay: (this: Window, ev: Event) => any;
+declare var onplaying: (this: Window, ev: Event) => any;
+declare var onpopstate: (this: Window, ev: PopStateEvent) => any;
+declare var onprogress: (this: Window, ev: ProgressEvent) => any;
+declare var onratechange: (this: Window, ev: Event) => any;
+declare var onreadystatechange: (this: Window, ev: ProgressEvent) => any;
+declare var onreset: (this: Window, ev: Event) => any;
+declare var onresize: (this: Window, ev: UIEvent) => any;
+declare var onscroll: (this: Window, ev: UIEvent) => any;
+declare var onseeked: (this: Window, ev: Event) => any;
+declare var onseeking: (this: Window, ev: Event) => any;
+declare var onselect: (this: Window, ev: UIEvent) => any;
+declare var onstalled: (this: Window, ev: Event) => any;
+declare var onstorage: (this: Window, ev: StorageEvent) => any;
+declare var onsubmit: (this: Window, ev: Event) => any;
+declare var onsuspend: (this: Window, ev: Event) => any;
+declare var ontimeupdate: (this: Window, ev: Event) => any;
+declare var ontouchcancel: (ev: TouchEvent) => any;
+declare var ontouchend: (ev: TouchEvent) => any;
+declare var ontouchmove: (ev: TouchEvent) => any;
+declare var ontouchstart: (ev: TouchEvent) => any;
+declare var onunload: (this: Window, ev: Event) => any;
+declare var onvolumechange: (this: Window, ev: Event) => any;
+declare var onwaiting: (this: Window, ev: Event) => any;
+declare var opener: any;
+declare var orientation: string | number;
+declare var outerHeight: number;
+declare var outerWidth: number;
+declare var pageXOffset: number;
+declare var pageYOffset: number;
+declare var parent: Window;
+declare var performance: Performance;
+declare var personalbar: BarProp;
+declare var screen: Screen;
+declare var screenLeft: number;
+declare var screenTop: number;
+declare var screenX: number;
+declare var screenY: number;
+declare var scrollbars: BarProp;
+declare var scrollX: number;
+declare var scrollY: number;
+declare var self: Window;
+declare var speechSynthesis: SpeechSynthesis;
+declare var status: string;
+declare var statusbar: BarProp;
+declare var styleMedia: StyleMedia;
+declare var toolbar: BarProp;
+declare var top: Window;
+declare var window: Window;
+declare var customElements: CustomElementRegistry;
+declare function alert(message?: any): void;
+declare function blur(): void;
+declare function cancelAnimationFrame(handle: number): void;
+declare function captureEvents(): void;
+declare function close(): void;
+declare function confirm(message?: string): boolean;
+declare function departFocus(navigationReason: NavigationReason, origin: FocusNavigationOrigin): void;
+declare function focus(): void;
+declare function getComputedStyle(elt: Element, pseudoElt?: string): CSSStyleDeclaration;
+declare function getMatchedCSSRules(elt: Element, pseudoElt?: string): CSSRuleList;
+declare function getSelection(): Selection;
+declare function matchMedia(mediaQuery: string): MediaQueryList;
+declare function moveBy(x?: number, y?: number): void;
+declare function moveTo(x?: number, y?: number): void;
+declare function msWriteProfilerMark(profilerMarkName: string): void;
+declare function open(url?: string, target?: string, features?: string, replace?: boolean): Window;
+declare function postMessage(message: any, targetOrigin: string, transfer?: any[]): void;
+declare function print(): void;
+declare function prompt(message?: string, _default?: string): string | null;
+declare function releaseEvents(): void;
+declare function requestAnimationFrame(callback: FrameRequestCallback): number;
+declare function resizeBy(x?: number, y?: number): void;
+declare function resizeTo(x?: number, y?: number): void;
+declare function scroll(x?: number, y?: number): void;
+declare function scrollBy(x?: number, y?: number): void;
+declare function scrollTo(x?: number, y?: number): void;
+declare function stop(): void;
+declare function webkitCancelAnimationFrame(handle: number): void;
+declare function webkitConvertPointFromNodeToPage(node: Node, pt: WebKitPoint): WebKitPoint;
+declare function webkitConvertPointFromPageToNode(node: Node, pt: WebKitPoint): WebKitPoint;
+declare function webkitRequestAnimationFrame(callback: FrameRequestCallback): number;
+declare function createImageBitmap(image: HTMLImageElement | SVGImageElement | HTMLVideoElement | HTMLCanvasElement | ImageBitmap | ImageData | Blob, options?: ImageBitmapOptions): Promise<ImageBitmap>;
+declare function createImageBitmap(image: HTMLImageElement | SVGImageElement | HTMLVideoElement | HTMLCanvasElement | ImageBitmap | ImageData | Blob, sx: number, sy: number, sw: number, sh: number, options?: ImageBitmapOptions): Promise<ImageBitmap>;
+declare function scroll(options?: ScrollToOptions): void;
+declare function scrollTo(options?: ScrollToOptions): void;
+declare function scrollBy(options?: ScrollToOptions): void;
+declare function toString(): string;
+declare function dispatchEvent(evt: Event): boolean;
+declare function removeEventListener(type: string, listener?: EventListenerOrEventListenerObject, options?: boolean | EventListenerOptions): void;
+declare function clearInterval(handle: number): void;
+declare function clearTimeout(handle: number): void;
+declare function setInterval(handler: (...args: any[]) => void, timeout: number): number;
+declare function setInterval(handler: any, timeout?: any, ...args: any[]): number;
+declare function setTimeout(handler: (...args: any[]) => void, timeout: number): number;
+declare function setTimeout(handler: any, timeout?: any, ...args: any[]): number;
+declare function clearImmediate(handle: number): void;
+declare function setImmediate(handler: (...args: any[]) => void): number;
+declare function setImmediate(handler: any, ...args: any[]): number;
+declare var sessionStorage: Storage;
+declare var localStorage: Storage;
+declare var console: Console;
+declare var onpointercancel: (this: Window, ev: PointerEvent) => any;
+declare var onpointerdown: (this: Window, ev: PointerEvent) => any;
+declare var onpointerenter: (this: Window, ev: PointerEvent) => any;
+declare var onpointerleave: (this: Window, ev: PointerEvent) => any;
+declare var onpointermove: (this: Window, ev: PointerEvent) => any;
+declare var onpointerout: (this: Window, ev: PointerEvent) => any;
+declare var onpointerover: (this: Window, ev: PointerEvent) => any;
+declare var onpointerup: (this: Window, ev: PointerEvent) => any;
+declare var onwheel: (this: Window, ev: WheelEvent) => any;
+declare var indexedDB: IDBFactory;
+declare function atob(encodedString: string): string;
+declare function btoa(rawString: string): string;
+declare function fetch(input: RequestInfo, init?: RequestInit): Promise<Response>;
+declare function addEventListener<K extends keyof WindowEventMap>(type: K, listener: (this: Window, ev: WindowEventMap[K]) => any, useCapture?: boolean): void;
+declare function addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+type AAGUID = string;
+type AlgorithmIdentifier = string | Algorithm;
+type BodyInit = any;
+type ByteString = string;
+type ConstrainBoolean = boolean | ConstrainBooleanParameters;
+type ConstrainDOMString = string | string[] | ConstrainDOMStringParameters;
+type ConstrainDouble = number | ConstrainDoubleRange;
+type ConstrainLong = number | ConstrainLongRange;
+type CryptoOperationData = ArrayBufferView;
+type GLbitfield = number;
+type GLboolean = boolean;
+type GLbyte = number;
+type GLclampf = number;
+type GLenum = number;
+type GLfloat = number;
+type GLint = number;
+type GLintptr = number;
+type GLshort = number;
+type GLsizei = number;
+type GLsizeiptr = number;
+type GLubyte = number;
+type GLuint = number;
+type GLushort = number;
+type HeadersInit = any;
+type IDBKeyPath = string;
+type KeyFormat = string;
+type KeyType = string;
+type KeyUsage = string;
+type MSInboundPayload = MSVideoRecvPayload | MSAudioRecvPayload;
+type MSLocalClientEvent = MSLocalClientEventBase | MSAudioLocalClientEvent;
+type MSOutboundPayload = MSVideoSendPayload | MSAudioSendPayload;
+type RTCIceGatherCandidate = RTCIceCandidateDictionary | RTCIceCandidateComplete;
+type RTCTransport = RTCDtlsTransport | RTCSrtpSdesTransport;
+type RequestInfo = Request | string;
+type USVString = string;
+type payloadtype = number;
+type ScrollBehavior = "auto" | "instant" | "smooth";
+type ScrollLogicalPosition = "start" | "center" | "end" | "nearest";
+type IDBValidKey = number | string | Date | IDBArrayKey;
+type BufferSource = ArrayBuffer | ArrayBufferView;
+type MouseWheelEvent = WheelEvent;
+type ScrollRestoration = "auto" | "manual";
+type FormDataEntryValue = string | File;
+type InsertPosition = "beforebegin" | "afterbegin" | "beforeend" | "afterend";
+type AppendMode = "segments" | "sequence";
+type AudioContextState = "suspended" | "running" | "closed";
+type BiquadFilterType = "lowpass" | "highpass" | "bandpass" | "lowshelf" | "highshelf" | "peaking" | "notch" | "allpass";
+type CanvasFillRule = "nonzero" | "evenodd";
+type ChannelCountMode = "max" | "clamped-max" | "explicit";
+type ChannelInterpretation = "speakers" | "discrete";
+type DistanceModelType = "linear" | "inverse" | "exponential";
+type ExpandGranularity = "character" | "word" | "sentence" | "textedit";
+type GamepadInputEmulationType = "mouse" | "keyboard" | "gamepad";
+type IDBCursorDirection = "next" | "nextunique" | "prev" | "prevunique";
+type IDBRequestReadyState = "pending" | "done";
+type IDBTransactionMode = "readonly" | "readwrite" | "versionchange";
+type ListeningState = "inactive" | "active" | "disambiguation";
+type MediaDeviceKind = "audioinput" | "audiooutput" | "videoinput";
+type MediaKeyMessageType = "license-request" | "license-renewal" | "license-release" | "individualization-request";
+type MediaKeySessionType = "temporary" | "persistent-license" | "persistent-release-message";
+type MediaKeysRequirement = "required" | "optional" | "not-allowed";
+type MediaKeyStatus = "usable" | "expired" | "output-downscaled" | "output-not-allowed" | "status-pending" | "internal-error";
+type MediaStreamTrackState = "live" | "ended";
+type MSCredentialType = "FIDO_2_0";
+type MSIceAddrType = "os" | "stun" | "turn" | "peer-derived";
+type MSIceType = "failed" | "direct" | "relay";
+type MSStatsType = "description" | "localclientevent" | "inbound-network" | "outbound-network" | "inbound-payload" | "outbound-payload" | "transportdiagnostics";
+type MSTransportType = "Embedded" | "USB" | "NFC" | "BT";
+type MSWebViewPermissionState = "unknown" | "defer" | "allow" | "deny";
+type MSWebViewPermissionType = "geolocation" | "unlimitedIndexedDBQuota" | "media" | "pointerlock" | "webnotifications";
+type NavigationReason = "up" | "down" | "left" | "right";
+type NavigationType = "navigate" | "reload" | "back_forward" | "prerender";
+type NotificationDirection = "auto" | "ltr" | "rtl";
+type NotificationPermission = "default" | "denied" | "granted";
+type OscillatorType = "sine" | "square" | "sawtooth" | "triangle" | "custom";
+type OverSampleType = "none" | "2x" | "4x";
+type PanningModelType = "equalpower";
+type PaymentComplete = "success" | "fail" | "";
+type PaymentShippingType = "shipping" | "delivery" | "pickup";
+type PushEncryptionKeyName = "p256dh" | "auth";
+type PushPermissionState = "granted" | "denied" | "prompt";
+type ReferrerPolicy = "" | "no-referrer" | "no-referrer-when-downgrade" | "origin-only" | "origin-when-cross-origin" | "unsafe-url";
+type RequestCache = "default" | "no-store" | "reload" | "no-cache" | "force-cache";
+type RequestCredentials = "omit" | "same-origin" | "include";
+type RequestDestination = "" | "document" | "sharedworker" | "subresource" | "unknown" | "worker";
+type RequestMode = "navigate" | "same-origin" | "no-cors" | "cors";
+type RequestRedirect = "follow" | "error" | "manual";
+type RequestType = "" | "audio" | "font" | "image" | "script" | "style" | "track" | "video";
+type ResponseType = "basic" | "cors" | "default" | "error" | "opaque" | "opaqueredirect";
+type RTCBundlePolicy = "balanced" | "max-compat" | "max-bundle";
+type RTCDegradationPreference = "maintain-framerate" | "maintain-resolution" | "balanced";
+type RTCDtlsRole = "auto" | "client" | "server";
+type RTCDtlsTransportState = "new" | "connecting" | "connected" | "closed";
+type RTCIceCandidateType = "host" | "srflx" | "prflx" | "relay";
+type RTCIceComponent = "RTP" | "RTCP";
+type RTCIceConnectionState = "new" | "checking" | "connected" | "completed" | "failed" | "disconnected" | "closed";
+type RTCIceGathererState = "new" | "gathering" | "complete";
+type RTCIceGatheringState = "new" | "gathering" | "complete";
+type RTCIceGatherPolicy = "all" | "nohost" | "relay";
+type RTCIceProtocol = "udp" | "tcp";
+type RTCIceRole = "controlling" | "controlled";
+type RTCIceTcpCandidateType = "active" | "passive" | "so";
+type RTCIceTransportPolicy = "none" | "relay" | "all";
+type RTCIceTransportState = "new" | "checking" | "connected" | "completed" | "disconnected" | "closed";
+type RTCSdpType = "offer" | "pranswer" | "answer";
+type RTCSignalingState = "stable" | "have-local-offer" | "have-remote-offer" | "have-local-pranswer" | "have-remote-pranswer" | "closed";
+type RTCStatsIceCandidatePairState = "frozen" | "waiting" | "inprogress" | "failed" | "succeeded" | "cancelled";
+type RTCStatsIceCandidateType = "host" | "serverreflexive" | "peerreflexive" | "relayed";
+type RTCStatsType = "inboundrtp" | "outboundrtp" | "session" | "datachannel" | "track" | "transport" | "candidatepair" | "localcandidate" | "remotecandidate";
+type ScopedCredentialType = "ScopedCred";
+type ServiceWorkerState = "installing" | "installed" | "activating" | "activated" | "redundant";
+type Transport = "usb" | "nfc" | "ble";
+type VideoFacingModeEnum = "user" | "environment" | "left" | "right";
+type VisibilityState = "hidden" | "visible" | "prerender" | "unloaded";
+type XMLHttpRequestResponseType = "" | "arraybuffer" | "blob" | "document" | "json" | "text";
+
+
+/////////////////////////////
+/// WorkerGlobalScope APIs
+/////////////////////////////
+// These are only available in a Web Worker
+declare function importScripts(...urls: string[]): void;
+
+
+
+
+/////////////////////////////
+/// Windows Script Host APIS
+/////////////////////////////
+
+
+interface ActiveXObject {
+    new (s: string): any;
+}
+declare var ActiveXObject: ActiveXObject;
+
+interface ITextWriter {
+    Write(s: string): void;
+    WriteLine(s: string): void;
+    Close(): void;
+}
+
+interface TextStreamBase {
+    /**
+     * The column number of the current character position in an input stream.
+     */
+    Column: number;
+
+    /**
+     * The current line number in an input stream.
+     */
+    Line: number;
+
+    /**
+     * Closes a text stream.
+     * It is not necessary to close standard streams; they close automatically when the process ends. If
+     * you close a standard stream, be aware that any other pointers to that standard stream become invalid.
+     */
+    Close(): void;
+}
+
+interface TextStreamWriter extends TextStreamBase {
+    /**
+     * Sends a string to an output stream.
+     */
+    Write(s: string): void;
+
+    /**
+     * Sends a specified number of blank lines (newline characters) to an output stream.
+     */
+    WriteBlankLines(intLines: number): void;
+
+    /**
+     * Sends a string followed by a newline character to an output stream.
+     */
+    WriteLine(s: string): void;
+}
+
+interface TextStreamReader extends TextStreamBase {
+    /**
+     * Returns a specified number of characters from an input stream, starting at the current pointer position.
+     * Does not return until the ENTER key is pressed.
+     * Can only be used on a stream in reading mode; causes an error in writing or appending mode.
+     */
+    Read(characters: number): string;
+
+    /**
+     * Returns all characters from an input stream.
+     * Can only be used on a stream in reading mode; causes an error in writing or appending mode.
+     */
+    ReadAll(): string;
+
+    /**
+     * Returns an entire line from an input stream.
+     * Although this method extracts the newline character, it does not add it to the returned string.
+     * Can only be used on a stream in reading mode; causes an error in writing or appending mode.
+     */
+    ReadLine(): string;
+
+    /**
+     * Skips a specified number of characters when reading from an input text stream.
+     * Can only be used on a stream in reading mode; causes an error in writing or appending mode.
+     * @param characters Positive number of characters to skip forward. (Backward skipping is not supported.)
+     */
+    Skip(characters: number): void;
+
+    /**
+     * Skips the next line when reading from an input text stream.
+     * Can only be used on a stream in reading mode, not writing or appending mode.
+     */
+    SkipLine(): void;
+
+    /**
+     * Indicates whether the stream pointer position is at the end of a line.
+     */
+    AtEndOfLine: boolean;
+
+    /**
+     * Indicates whether the stream pointer position is at the end of a stream.
+     */
+    AtEndOfStream: boolean;
+}
+
+declare var WScript: {
+    /**
+     * Outputs text to either a message box (under WScript.exe) or the command console window followed by
+     * a newline (under CScript.exe).
+     */
+    Echo(s: any): void;
+
+    /**
+     * Exposes the write-only error output stream for the current script.
+     * Can be accessed only while using CScript.exe.
+     */
+    StdErr: TextStreamWriter;
+
+    /**
+     * Exposes the write-only output stream for the current script.
+     * Can be accessed only while using CScript.exe.
+     */
+    StdOut: TextStreamWriter;
+    Arguments: { length: number; Item(n: number): string; };
+
+    /**
+     *  The full path of the currently running script.
+     */
+    ScriptFullName: string;
+
+    /**
+     * Forces the script to stop immediately, with an optional exit code.
+     */
+    Quit(exitCode?: number): number;
+
+    /**
+     * The Windows Script Host build version number.
+     */
+    BuildVersion: number;
+
+    /**
+     * Fully qualified path of the host executable.
+     */
+    FullName: string;
+
+    /**
+     * Gets/sets the script mode - interactive(true) or batch(false).
+     */
+    Interactive: boolean;
+
+    /**
+     * The name of the host executable (WScript.exe or CScript.exe).
+     */
+    Name: string;
+
+    /**
+     * Path of the directory containing the host executable.
+     */
+    Path: string;
+
+    /**
+     * The filename of the currently running script.
+     */
+    ScriptName: string;
+
+    /**
+     * Exposes the read-only input stream for the current script.
+     * Can be accessed only while using CScript.exe.
+     */
+    StdIn: TextStreamReader;
+
+    /**
+     * Windows Script Host version
+     */
+    Version: string;
+
+    /**
+     * Connects a COM object's event sources to functions named with a given prefix, in the form prefix_event.
+     */
+    ConnectObject(objEventSource: any, strPrefix: string): void;
+
+    /**
+     * Creates a COM object.
+     * @param strProgiID
+     * @param strPrefix Function names in the form prefix_event will be bound to this object's COM events.
+     */
+    CreateObject(strProgID: string, strPrefix?: string): any;
+
+    /**
+     * Disconnects a COM object from its event sources.
+     */
+    DisconnectObject(obj: any): void;
+
+    /**
+     * Retrieves an existing object with the specified ProgID from memory, or creates a new one from a file.
+     * @param strPathname Fully qualified path to the file containing the object persisted to disk.
+     *                       For objects in memory, pass a zero-length string.
+     * @param strProgID
+     * @param strPrefix Function names in the form prefix_event will be bound to this object's COM events.
+     */
+    GetObject(strPathname: string, strProgID?: string, strPrefix?: string): any;
+
+    /**
+     * Suspends script execution for a specified length of time, then continues execution.
+     * @param intTime Interval (in milliseconds) to suspend script execution.
+     */
+    Sleep(intTime: number): void;
+};
+
+/**
+ * Allows enumerating over a COM collection, which may not have indexed item access.
+ */
+interface Enumerator<T> {
+    /**
+     * Returns true if the current item is the last one in the collection, or the collection is empty,
+     * or the current item is undefined.
+     */
+    atEnd(): boolean;
+
+    /**
+     * Returns the current item in the collection
+     */
+    item(): T;
+
+    /**
+     * Resets the current item in the collection to the first item. If there are no items in the collection,
+     * the current item is set to undefined.
+     */
+    moveFirst(): void;
+
+    /**
+     * Moves the current item to the next item in the collection. If the enumerator is at the end of
+     * the collection or the collection is empty, the current item is set to undefined.
+     */
+    moveNext(): void;
+}
+
+interface EnumeratorConstructor {
+    new <T>(collection: any): Enumerator<T>;
+    new (collection: any): Enumerator<any>;
+}
+
+declare var Enumerator: EnumeratorConstructor;
+
+/**
+ * Enables reading from a COM safe array, which might have an alternate lower bound, or multiple dimensions.
+ */
+interface VBArray<T> {
+    /**
+     * Returns the number of dimensions (1-based).
+     */
+    dimensions(): number;
+
+    /**
+     * Takes an index for each dimension in the array, and returns the item at the corresponding location.
+     */
+    getItem(dimension1Index: number, ...dimensionNIndexes: number[]): T;
+
+    /**
+     * Returns the smallest available index for a given dimension.
+     * @param dimension 1-based dimension (defaults to 1)
+     */
+    lbound(dimension?: number): number;
+
+    /**
+     * Returns the largest available index for a given dimension.
+     * @param dimension 1-based dimension (defaults to 1)
+     */
+    ubound(dimension?: number): number;
+
+    /**
+     * Returns a Javascript array with all the elements in the VBArray. If there are multiple dimensions,
+     * each successive dimension is appended to the end of the array.
+     * Example: [[1,2,3],[4,5,6]] becomes [1,2,3,4,5,6]
+     */
+    toArray(): T[];
+}
+
+interface VBArrayConstructor {
+    new <T>(safeArray: any): VBArray<T>;
+    new (safeArray: any): VBArray<any>;
+}
+
+declare var VBArray: VBArrayConstructor;
+
+/**
+ * Automation date (VT_DATE)
+ */
+interface VarDate { }
+
+interface DateConstructor {
+    new (vd: VarDate): Date;
+}
+
+interface Date {
+    getVarDate: () => VarDate;
+}
+
+
+/// <reference path="lib.dom.d.ts" />
+
+interface DOMTokenList {
+    [Symbol.iterator](): IterableIterator<string>;
+}
+
+interface FormData {
+    /**
+     * Returns an array of key, value pairs for every entry in the list
+     */
+    entries(): IterableIterator<[string, string | File]>;
+    /**
+     * Returns a list of keys in the list
+     */
+    keys(): IterableIterator<string>;
+    /**
+     * Returns a list of values in the list
+     */
+    values(): IterableIterator<string | File>;
+
+    [Symbol.iterator](): IterableIterator<string | File>;
+}
+
+interface Headers {
+    [Symbol.iterator](): IterableIterator<[string, string]>;
+    /**
+     * Returns an iterator allowing to go through all key/value pairs contained in this object.
+     */
+    entries(): IterableIterator<[string, string]>;
+    /**
+     * Returns an iterator allowing to go through all keys f the key/value pairs contained in this object.
+     */
+    keys(): IterableIterator<string>;
+    /**
+     * Returns an iterator allowing to go through all values of the key/value pairs contained in this object.
+     */
+    values(): IterableIterator<string>;
+}
+
+interface NodeList {
+    /**
+     * Returns an array of key, value pairs for every entry in the list
+     */
+    entries(): IterableIterator<[number, Node]>;
+    /**
+     * Performs the specified action for each node in an list.
+     * @param callbackfn  A function that accepts up to three arguments. forEach calls the callbackfn function one time for each element in the list.
+     * @param thisArg  An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
+     */
+    forEach(callbackfn: (value: Node, index: number, listObj: NodeList) => void, thisArg?: any): void;
+    /**
+     * Returns an list of keys in the list
+     */
+    keys(): IterableIterator<number>;
+
+    /**
+     * Returns an list of values in the list
+     */
+    values(): IterableIterator<Node>;
+
+
+    [Symbol.iterator](): IterableIterator<Node>;
+}
+
+interface NodeListOf<TNode extends Node> {
+
+    /**
+     * Returns an array of key, value pairs for every entry in the list
+     */
+    entries(): IterableIterator<[number, TNode]>;
+
+    /**
+     * Performs the specified action for each node in an list.
+     * @param callbackfn  A function that accepts up to three arguments. forEach calls the callbackfn function one time for each element in the list.
+     * @param thisArg  An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
+     */
+    forEach(callbackfn: (value: TNode, index: number, listObj: NodeListOf<TNode>) => void, thisArg?: any): void;
+    /**
+     * Returns an list of keys in the list
+     */
+    keys(): IterableIterator<number>;
+    /**
+     * Returns an list of values in the list
+     */
+    values(): IterableIterator<TNode>;
+
+    [Symbol.iterator](): IterableIterator<TNode>;
+}
+
+interface URLSearchParams {
+    /**
+     * Returns an array of key, value pairs for every entry in the search params
+     */
+    entries(): IterableIterator<[string, string]>;
+    /**
+     * Returns a list of keys in the search params
+     */
+    keys(): IterableIterator<string>;
+    /**
+     * Returns a list of values in the search params
+     */
+    values(): IterableIterator<string>;
+    /**
+     * iterate over key/value pairs
+     */
+    [Symbol.iterator](): IterableIterator<[string, string]>;
+}
diff --git a/bin/lib.esnext.asynciterable.d.ts b/bin/lib.esnext.asynciterable.d.ts
new file mode 100644
index 0000000..d9e17e6
--- /dev/null
+++ b/bin/lib.esnext.asynciterable.d.ts
@@ -0,0 +1,44 @@
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved. 
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0  
+ 
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
+MERCHANTABLITY OR NON-INFRINGEMENT. 
+ 
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+
+
+
+/// <reference no-default-lib="true"/>
+
+
+/// <reference path="lib.es2015.symbol.d.ts" />
+/// <reference path="lib.es2015.iterable.d.ts" />
+
+interface SymbolConstructor {
+    /**
+     * A method that returns the default async iterator for an object. Called by the semantics of
+     * the for-await-of statement.
+     */
+    readonly asyncIterator: symbol;
+}
+
+interface AsyncIterator<T> {
+    next(value?: any): Promise<IteratorResult<T>>;
+    return?(value?: any): Promise<IteratorResult<T>>;
+    throw?(e?: any): Promise<IteratorResult<T>>;
+}
+
+interface AsyncIterable<T> {
+    [Symbol.asyncIterator](): AsyncIterator<T>;
+}
+
+interface AsyncIterableIterator<T> extends AsyncIterator<T> {
+    [Symbol.asyncIterator](): AsyncIterableIterator<T>;
+}
\ No newline at end of file
diff --git a/bin/lib.esnext.d.ts b/bin/lib.esnext.d.ts
new file mode 100644
index 0000000..ebc1e9d
--- /dev/null
+++ b/bin/lib.esnext.d.ts
@@ -0,0 +1,22 @@
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved. 
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0  
+ 
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
+MERCHANTABLITY OR NON-INFRINGEMENT. 
+ 
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+
+
+
+/// <reference no-default-lib="true"/>
+
+
+/// <reference path="lib.es2017.d.ts" />
+/// <reference path="lib.esnext.asynciterable.d.ts" />
diff --git a/bin/lib.esnext.full.d.ts b/bin/lib.esnext.full.d.ts
new file mode 100644
index 0000000..4d06a07
--- /dev/null
+++ b/bin/lib.esnext.full.d.ts
@@ -0,0 +1,15217 @@
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved. 
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0  
+ 
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
+MERCHANTABLITY OR NON-INFRINGEMENT. 
+ 
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+
+
+
+/// <reference no-default-lib="true"/>
+
+
+/// <reference path="lib.es2017.d.ts" />
+/// <reference path="lib.esnext.asynciterable.d.ts" />
+
+
+
+/////////////////////////////
+/// DOM APIs
+/////////////////////////////
+
+interface Account {
+    displayName?: string;
+    id?: string;
+    imageURL?: string;
+    name?: string;
+    rpDisplayName?: string;
+}
+
+interface Algorithm {
+    name: string;
+}
+
+interface AnimationEventInit extends EventInit {
+    animationName?: string;
+    elapsedTime?: number;
+}
+
+interface AssertionOptions {
+    allowList?: ScopedCredentialDescriptor[];
+    extensions?: WebAuthnExtensions;
+    rpId?: USVString;
+    timeoutSeconds?: number;
+}
+
+interface CacheQueryOptions {
+    cacheName?: string;
+    ignoreMethod?: boolean;
+    ignoreSearch?: boolean;
+    ignoreVary?: boolean;
+}
+
+interface ClientData {
+    challenge?: string;
+    extensions?: WebAuthnExtensions;
+    hashAlg?: string | Algorithm;
+    origin?: string;
+    rpId?: string;
+    tokenBinding?: string;
+}
+
+interface CloseEventInit extends EventInit {
+    code?: number;
+    reason?: string;
+    wasClean?: boolean;
+}
+
+interface CompositionEventInit extends UIEventInit {
+    data?: string;
+}
+
+interface ConfirmSiteSpecificExceptionsInformation extends ExceptionInformation {
+    arrayOfDomainStrings?: string[];
+}
+
+interface ConstrainBooleanParameters {
+    exact?: boolean;
+    ideal?: boolean;
+}
+
+interface ConstrainDOMStringParameters {
+    exact?: string | string[];
+    ideal?: string | string[];
+}
+
+interface ConstrainDoubleRange extends DoubleRange {
+    exact?: number;
+    ideal?: number;
+}
+
+interface ConstrainLongRange extends LongRange {
+    exact?: number;
+    ideal?: number;
+}
+
+interface ConstrainVideoFacingModeParameters {
+    exact?: VideoFacingModeEnum | VideoFacingModeEnum[];
+    ideal?: VideoFacingModeEnum | VideoFacingModeEnum[];
+}
+
+interface CustomEventInit extends EventInit {
+    detail?: any;
+}
+
+interface DeviceAccelerationDict {
+    x?: number;
+    y?: number;
+    z?: number;
+}
+
+interface DeviceLightEventInit extends EventInit {
+    value?: number;
+}
+
+interface DeviceMotionEventInit extends EventInit {
+    acceleration?: DeviceAccelerationDict;
+    accelerationIncludingGravity?: DeviceAccelerationDict;
+    interval?: number;
+    rotationRate?: DeviceRotationRateDict;
+}
+
+interface DeviceOrientationEventInit extends EventInit {
+    absolute?: boolean;
+    alpha?: number;
+    beta?: number;
+    gamma?: number;
+}
+
+interface DeviceRotationRateDict {
+    alpha?: number;
+    beta?: number;
+    gamma?: number;
+}
+
+interface DOMRectInit {
+    height?: any;
+    width?: any;
+    x?: any;
+    y?: any;
+}
+
+interface DoubleRange {
+    max?: number;
+    min?: number;
+}
+
+interface ErrorEventInit extends EventInit {
+    colno?: number;
+    error?: any;
+    filename?: string;
+    lineno?: number;
+    message?: string;
+}
+
+interface EventInit {
+    scoped?: boolean;
+    bubbles?: boolean;
+    cancelable?: boolean;
+}
+
+interface EventModifierInit extends UIEventInit {
+    altKey?: boolean;
+    ctrlKey?: boolean;
+    metaKey?: boolean;
+    modifierAltGraph?: boolean;
+    modifierCapsLock?: boolean;
+    modifierFn?: boolean;
+    modifierFnLock?: boolean;
+    modifierHyper?: boolean;
+    modifierNumLock?: boolean;
+    modifierOS?: boolean;
+    modifierScrollLock?: boolean;
+    modifierSuper?: boolean;
+    modifierSymbol?: boolean;
+    modifierSymbolLock?: boolean;
+    shiftKey?: boolean;
+}
+
+interface ExceptionInformation {
+    domain?: string;
+}
+
+interface FocusEventInit extends UIEventInit {
+    relatedTarget?: EventTarget;
+}
+
+interface FocusNavigationEventInit extends EventInit {
+    navigationReason?: string;
+    originHeight?: number;
+    originLeft?: number;
+    originTop?: number;
+    originWidth?: number;
+}
+
+interface FocusNavigationOrigin {
+    originHeight?: number;
+    originLeft?: number;
+    originTop?: number;
+    originWidth?: number;
+}
+
+interface GamepadEventInit extends EventInit {
+    gamepad?: Gamepad;
+}
+
+interface GetNotificationOptions {
+    tag?: string;
+}
+
+interface HashChangeEventInit extends EventInit {
+    newURL?: string;
+    oldURL?: string;
+}
+
+interface IDBIndexParameters {
+    multiEntry?: boolean;
+    unique?: boolean;
+}
+
+interface IDBObjectStoreParameters {
+    autoIncrement?: boolean;
+    keyPath?: IDBKeyPath;
+}
+
+interface IntersectionObserverEntryInit {
+    boundingClientRect?: DOMRectInit;
+    intersectionRect?: DOMRectInit;
+    rootBounds?: DOMRectInit;
+    target?: Element;
+    time?: number;
+}
+
+interface IntersectionObserverInit {
+    root?: Element;
+    rootMargin?: string;
+    threshold?: number | number[];
+}
+
+interface KeyAlgorithm {
+    name?: string;
+}
+
+interface KeyboardEventInit extends EventModifierInit {
+    code?: string;
+    key?: string;
+    location?: number;
+    repeat?: boolean;
+}
+
+interface LongRange {
+    max?: number;
+    min?: number;
+}
+
+interface MediaEncryptedEventInit extends EventInit {
+    initData?: ArrayBuffer;
+    initDataType?: string;
+}
+
+interface MediaKeyMessageEventInit extends EventInit {
+    message?: ArrayBuffer;
+    messageType?: MediaKeyMessageType;
+}
+
+interface MediaKeySystemConfiguration {
+    audioCapabilities?: MediaKeySystemMediaCapability[];
+    distinctiveIdentifier?: MediaKeysRequirement;
+    initDataTypes?: string[];
+    persistentState?: MediaKeysRequirement;
+    videoCapabilities?: MediaKeySystemMediaCapability[];
+}
+
+interface MediaKeySystemMediaCapability {
+    contentType?: string;
+    robustness?: string;
+}
+
+interface MediaStreamConstraints {
+    audio?: boolean | MediaTrackConstraints;
+    video?: boolean | MediaTrackConstraints;
+}
+
+interface MediaStreamErrorEventInit extends EventInit {
+    error?: MediaStreamError;
+}
+
+interface MediaStreamEventInit extends EventInit {
+    stream?: MediaStream;
+}
+
+interface MediaStreamTrackEventInit extends EventInit {
+    track?: MediaStreamTrack;
+}
+
+interface MediaTrackCapabilities {
+    aspectRatio?: number | DoubleRange;
+    deviceId?: string;
+    echoCancellation?: boolean[];
+    facingMode?: string;
+    frameRate?: number | DoubleRange;
+    groupId?: string;
+    height?: number | LongRange;
+    sampleRate?: number | LongRange;
+    sampleSize?: number | LongRange;
+    volume?: number | DoubleRange;
+    width?: number | LongRange;
+}
+
+interface MediaTrackConstraints extends MediaTrackConstraintSet {
+    advanced?: MediaTrackConstraintSet[];
+}
+
+interface MediaTrackConstraintSet {
+    aspectRatio?: number | ConstrainDoubleRange;
+    deviceId?: string | string[] | ConstrainDOMStringParameters;
+    echoCancelation?: boolean | ConstrainBooleanParameters;
+    facingMode?: string | string[] | ConstrainDOMStringParameters;
+    frameRate?: number | ConstrainDoubleRange;
+    groupId?: string | string[] | ConstrainDOMStringParameters;
+    height?: number | ConstrainLongRange;
+    sampleRate?: number | ConstrainLongRange;
+    sampleSize?: number | ConstrainLongRange;
+    volume?: number | ConstrainDoubleRange;
+    width?: number | ConstrainLongRange;
+}
+
+interface MediaTrackSettings {
+    aspectRatio?: number;
+    deviceId?: string;
+    echoCancellation?: boolean;
+    facingMode?: string;
+    frameRate?: number;
+    groupId?: string;
+    height?: number;
+    sampleRate?: number;
+    sampleSize?: number;
+    volume?: number;
+    width?: number;
+}
+
+interface MediaTrackSupportedConstraints {
+    aspectRatio?: boolean;
+    deviceId?: boolean;
+    echoCancellation?: boolean;
+    facingMode?: boolean;
+    frameRate?: boolean;
+    groupId?: boolean;
+    height?: boolean;
+    sampleRate?: boolean;
+    sampleSize?: boolean;
+    volume?: boolean;
+    width?: boolean;
+}
+
+interface MessageEventInit extends EventInit {
+    lastEventId?: string;
+    channel?: string;
+    data?: any;
+    origin?: string;
+    ports?: MessagePort[];
+    source?: Window;
+}
+
+interface MouseEventInit extends EventModifierInit {
+    button?: number;
+    buttons?: number;
+    clientX?: number;
+    clientY?: number;
+    relatedTarget?: EventTarget;
+    screenX?: number;
+    screenY?: number;
+}
+
+interface MSAccountInfo {
+    accountImageUri?: string;
+    accountName?: string;
+    rpDisplayName?: string;
+    userDisplayName?: string;
+    userId?: string;
+}
+
+interface MSAudioLocalClientEvent extends MSLocalClientEventBase {
+    cpuInsufficientEventRatio?: number;
+    deviceCaptureNotFunctioningEventRatio?: number;
+    deviceClippingEventRatio?: number;
+    deviceEchoEventRatio?: number;
+    deviceGlitchesEventRatio?: number;
+    deviceHalfDuplexAECEventRatio?: number;
+    deviceHowlingEventCount?: number;
+    deviceLowSNREventRatio?: number;
+    deviceLowSpeechLevelEventRatio?: number;
+    deviceMultipleEndpointsEventCount?: number;
+    deviceNearEndToEchoRatioEventRatio?: number;
+    deviceRenderMuteEventRatio?: number;
+    deviceRenderNotFunctioningEventRatio?: number;
+    deviceRenderZeroVolumeEventRatio?: number;
+    networkDelayEventRatio?: number;
+    networkSendQualityEventRatio?: number;
+}
+
+interface MSAudioRecvPayload extends MSPayloadBase {
+    burstLossLength1?: number;
+    burstLossLength2?: number;
+    burstLossLength3?: number;
+    burstLossLength4?: number;
+    burstLossLength5?: number;
+    burstLossLength6?: number;
+    burstLossLength7?: number;
+    burstLossLength8OrHigher?: number;
+    fecRecvDistance1?: number;
+    fecRecvDistance2?: number;
+    fecRecvDistance3?: number;
+    packetReorderDepthAvg?: number;
+    packetReorderDepthMax?: number;
+    packetReorderRatio?: number;
+    ratioCompressedSamplesAvg?: number;
+    ratioConcealedSamplesAvg?: number;
+    ratioStretchedSamplesAvg?: number;
+    samplingRate?: number;
+    signal?: MSAudioRecvSignal;
+}
+
+interface MSAudioRecvSignal {
+    initialSignalLevelRMS?: number;
+    recvNoiseLevelCh1?: number;
+    recvSignalLevelCh1?: number;
+    renderLoopbackSignalLevel?: number;
+    renderNoiseLevel?: number;
+    renderSignalLevel?: number;
+}
+
+interface MSAudioSendPayload extends MSPayloadBase {
+    audioFECUsed?: boolean;
+    samplingRate?: number;
+    sendMutePercent?: number;
+    signal?: MSAudioSendSignal;
+}
+
+interface MSAudioSendSignal {
+    noiseLevel?: number;
+    sendNoiseLevelCh1?: number;
+    sendSignalLevelCh1?: number;
+}
+
+interface MSConnectivity {
+    iceType?: MSIceType;
+    iceWarningFlags?: MSIceWarningFlags;
+    relayAddress?: MSRelayAddress;
+}
+
+interface MSCredentialFilter {
+    accept?: MSCredentialSpec[];
+}
+
+interface MSCredentialParameters {
+    type?: MSCredentialType;
+}
+
+interface MSCredentialSpec {
+    id?: string;
+    type?: MSCredentialType;
+}
+
+interface MSDelay {
+    roundTrip?: number;
+    roundTripMax?: number;
+}
+
+interface MSDescription extends RTCStats {
+    connectivity?: MSConnectivity;
+    deviceDevName?: string;
+    localAddr?: MSIPAddressInfo;
+    networkconnectivity?: MSNetworkConnectivityInfo;
+    reflexiveLocalIPAddr?: MSIPAddressInfo;
+    remoteAddr?: MSIPAddressInfo;
+    transport?: RTCIceProtocol;
+}
+
+interface MSFIDOCredentialParameters extends MSCredentialParameters {
+    algorithm?: string | Algorithm;
+    authenticators?: AAGUID[];
+}
+
+interface MSIceWarningFlags {
+    allocationMessageIntegrityFailed?: boolean;
+    alternateServerReceived?: boolean;
+    connCheckMessageIntegrityFailed?: boolean;
+    connCheckOtherError?: boolean;
+    fipsAllocationFailure?: boolean;
+    multipleRelayServersAttempted?: boolean;
+    noRelayServersConfigured?: boolean;
+    portRangeExhausted?: boolean;
+    pseudoTLSFailure?: boolean;
+    tcpNatConnectivityFailed?: boolean;
+    tcpRelayConnectivityFailed?: boolean;
+    turnAuthUnknownUsernameError?: boolean;
+    turnTcpAllocateFailed?: boolean;
+    turnTcpSendFailed?: boolean;
+    turnTcpTimedOut?: boolean;
+    turnTurnTcpConnectivityFailed?: boolean;
+    turnUdpAllocateFailed?: boolean;
+    turnUdpSendFailed?: boolean;
+    udpLocalConnectivityFailed?: boolean;
+    udpNatConnectivityFailed?: boolean;
+    udpRelayConnectivityFailed?: boolean;
+    useCandidateChecksFailed?: boolean;
+}
+
+interface MSIPAddressInfo {
+    ipAddr?: string;
+    manufacturerMacAddrMask?: string;
+    port?: number;
+}
+
+interface MSJitter {
+    interArrival?: number;
+    interArrivalMax?: number;
+    interArrivalSD?: number;
+}
+
+interface MSLocalClientEventBase extends RTCStats {
+    networkBandwidthLowEventRatio?: number;
+    networkReceiveQualityEventRatio?: number;
+}
+
+interface MSNetwork extends RTCStats {
+    delay?: MSDelay;
+    jitter?: MSJitter;
+    packetLoss?: MSPacketLoss;
+    utilization?: MSUtilization;
+}
+
+interface MSNetworkConnectivityInfo {
+    linkspeed?: number;
+    networkConnectionDetails?: string;
+    vpn?: boolean;
+}
+
+interface MSNetworkInterfaceType {
+    interfaceTypeEthernet?: boolean;
+    interfaceTypePPP?: boolean;
+    interfaceTypeTunnel?: boolean;
+    interfaceTypeWireless?: boolean;
+    interfaceTypeWWAN?: boolean;
+}
+
+interface MSOutboundNetwork extends MSNetwork {
+    appliedBandwidthLimit?: number;
+}
+
+interface MSPacketLoss {
+    lossRate?: number;
+    lossRateMax?: number;
+}
+
+interface MSPayloadBase extends RTCStats {
+    payloadDescription?: string;
+}
+
+interface MSPortRange {
+    max?: number;
+    min?: number;
+}
+
+interface MSRelayAddress {
+    port?: number;
+    relayAddress?: string;
+}
+
+interface MSSignatureParameters {
+    userPrompt?: string;
+}
+
+interface MSTransportDiagnosticsStats extends RTCStats {
+    allocationTimeInMs?: number;
+    baseAddress?: string;
+    baseInterface?: MSNetworkInterfaceType;
+    iceRole?: RTCIceRole;
+    iceWarningFlags?: MSIceWarningFlags;
+    interfaces?: MSNetworkInterfaceType;
+    localAddress?: string;
+    localAddrType?: MSIceAddrType;
+    localInterface?: MSNetworkInterfaceType;
+    localMR?: string;
+    localMRTCPPort?: number;
+    localSite?: string;
+    msRtcEngineVersion?: string;
+    networkName?: string;
+    numConsentReqReceived?: number;
+    numConsentReqSent?: number;
+    numConsentRespReceived?: number;
+    numConsentRespSent?: number;
+    portRangeMax?: number;
+    portRangeMin?: number;
+    protocol?: RTCIceProtocol;
+    remoteAddress?: string;
+    remoteAddrType?: MSIceAddrType;
+    remoteMR?: string;
+    remoteMRTCPPort?: number;
+    remoteSite?: string;
+    rtpRtcpMux?: boolean;
+    stunVer?: number;
+}
+
+interface MSUtilization {
+    bandwidthEstimation?: number;
+    bandwidthEstimationAvg?: number;
+    bandwidthEstimationMax?: number;
+    bandwidthEstimationMin?: number;
+    bandwidthEstimationStdDev?: number;
+    packets?: number;
+}
+
+interface MSVideoPayload extends MSPayloadBase {
+    durationSeconds?: number;
+    resolution?: string;
+    videoBitRateAvg?: number;
+    videoBitRateMax?: number;
+    videoFrameRateAvg?: number;
+    videoPacketLossRate?: number;
+}
+
+interface MSVideoRecvPayload extends MSVideoPayload {
+    lowBitRateCallPercent?: number;
+    lowFrameRateCallPercent?: number;
+    recvBitRateAverage?: number;
+    recvBitRateMaximum?: number;
+    recvCodecType?: string;
+    recvFpsHarmonicAverage?: number;
+    recvFrameRateAverage?: number;
+    recvNumResSwitches?: number;
+    recvReorderBufferMaxSuccessfullyOrderedExtent?: number;
+    recvReorderBufferMaxSuccessfullyOrderedLateTime?: number;
+    recvReorderBufferPacketsDroppedDueToBufferExhaustion?: number;
+    recvReorderBufferPacketsDroppedDueToTimeout?: number;
+    recvReorderBufferReorderedPackets?: number;
+    recvResolutionHeight?: number;
+    recvResolutionWidth?: number;
+    recvVideoStreamsMax?: number;
+    recvVideoStreamsMin?: number;
+    recvVideoStreamsMode?: number;
+    reorderBufferTotalPackets?: number;
+    videoFrameLossRate?: number;
+    videoPostFECPLR?: number;
+    videoResolutions?: MSVideoResolutionDistribution;
+}
+
+interface MSVideoResolutionDistribution {
+    cifQuality?: number;
+    h1080Quality?: number;
+    h1440Quality?: number;
+    h2160Quality?: number;
+    h720Quality?: number;
+    vgaQuality?: number;
+}
+
+interface MSVideoSendPayload extends MSVideoPayload {
+    sendBitRateAverage?: number;
+    sendBitRateMaximum?: number;
+    sendFrameRateAverage?: number;
+    sendResolutionHeight?: number;
+    sendResolutionWidth?: number;
+    sendVideoStreamsMax?: number;
+}
+
+interface MsZoomToOptions {
+    animate?: string;
+    contentX?: number;
+    contentY?: number;
+    scaleFactor?: number;
+    viewportX?: string;
+    viewportY?: string;
+}
+
+interface MutationObserverInit {
+    attributeFilter?: string[];
+    attributeOldValue?: boolean;
+    attributes?: boolean;
+    characterData?: boolean;
+    characterDataOldValue?: boolean;
+    childList?: boolean;
+    subtree?: boolean;
+}
+
+interface NotificationOptions {
+    body?: string;
+    dir?: NotificationDirection;
+    icon?: string;
+    lang?: string;
+    tag?: string;
+}
+
+interface ObjectURLOptions {
+    oneTimeOnly?: boolean;
+}
+
+interface PaymentCurrencyAmount {
+    currency?: string;
+    currencySystem?: string;
+    value?: string;
+}
+
+interface PaymentDetails {
+    displayItems?: PaymentItem[];
+    error?: string;
+    modifiers?: PaymentDetailsModifier[];
+    shippingOptions?: PaymentShippingOption[];
+    total?: PaymentItem;
+}
+
+interface PaymentDetailsModifier {
+    additionalDisplayItems?: PaymentItem[];
+    data?: any;
+    supportedMethods?: string[];
+    total?: PaymentItem;
+}
+
+interface PaymentItem {
+    amount?: PaymentCurrencyAmount;
+    label?: string;
+    pending?: boolean;
+}
+
+interface PaymentMethodData {
+    data?: any;
+    supportedMethods?: string[];
+}
+
+interface PaymentOptions {
+    requestPayerEmail?: boolean;
+    requestPayerName?: boolean;
+    requestPayerPhone?: boolean;
+    requestShipping?: boolean;
+    shippingType?: string;
+}
+
+interface PaymentRequestUpdateEventInit extends EventInit {
+}
+
+interface PaymentShippingOption {
+    amount?: PaymentCurrencyAmount;
+    id?: string;
+    label?: string;
+    selected?: boolean;
+}
+
+interface PeriodicWaveConstraints {
+    disableNormalization?: boolean;
+}
+
+interface PointerEventInit extends MouseEventInit {
+    height?: number;
+    isPrimary?: boolean;
+    pointerId?: number;
+    pointerType?: string;
+    pressure?: number;
+    tiltX?: number;
+    tiltY?: number;
+    width?: number;
+}
+
+interface PopStateEventInit extends EventInit {
+    state?: any;
+}
+
+interface PositionOptions {
+    enableHighAccuracy?: boolean;
+    maximumAge?: number;
+    timeout?: number;
+}
+
+interface ProgressEventInit extends EventInit {
+    lengthComputable?: boolean;
+    loaded?: number;
+    total?: number;
+}
+
+interface PushSubscriptionOptionsInit {
+    applicationServerKey?: any;
+    userVisibleOnly?: boolean;
+}
+
+interface RegistrationOptions {
+    scope?: string;
+}
+
+interface RequestInit {
+    body?: any;
+    cache?: RequestCache;
+    credentials?: RequestCredentials;
+    headers?: any;
+    integrity?: string;
+    keepalive?: boolean;
+    method?: string;
+    mode?: RequestMode;
+    redirect?: RequestRedirect;
+    referrer?: string;
+    referrerPolicy?: ReferrerPolicy;
+    window?: any;
+}
+
+interface ResponseInit {
+    headers?: any;
+    status?: number;
+    statusText?: string;
+}
+
+interface RTCConfiguration {
+    bundlePolicy?: RTCBundlePolicy;
+    iceServers?: RTCIceServer[];
+    iceTransportPolicy?: RTCIceTransportPolicy;
+    peerIdentity?: string;
+}
+
+interface RTCDtlsFingerprint {
+    algorithm?: string;
+    value?: string;
+}
+
+interface RTCDtlsParameters {
+    fingerprints?: RTCDtlsFingerprint[];
+    role?: RTCDtlsRole;
+}
+
+interface RTCDTMFToneChangeEventInit extends EventInit {
+    tone?: string;
+}
+
+interface RTCIceCandidateAttributes extends RTCStats {
+    addressSourceUrl?: string;
+    candidateType?: RTCStatsIceCandidateType;
+    ipAddress?: string;
+    portNumber?: number;
+    priority?: number;
+    transport?: string;
+}
+
+interface RTCIceCandidateComplete {
+}
+
+interface RTCIceCandidateDictionary {
+    foundation?: string;
+    ip?: string;
+    msMTurnSessionId?: string;
+    port?: number;
+    priority?: number;
+    protocol?: RTCIceProtocol;
+    relatedAddress?: string;
+    relatedPort?: number;
+    tcpType?: RTCIceTcpCandidateType;
+    type?: RTCIceCandidateType;
+}
+
+interface RTCIceCandidateInit {
+    candidate?: string;
+    sdpMid?: string;
+    sdpMLineIndex?: number;
+}
+
+interface RTCIceCandidatePair {
+    local?: RTCIceCandidateDictionary;
+    remote?: RTCIceCandidateDictionary;
+}
+
+interface RTCIceCandidatePairStats extends RTCStats {
+    availableIncomingBitrate?: number;
+    availableOutgoingBitrate?: number;
+    bytesReceived?: number;
+    bytesSent?: number;
+    localCandidateId?: string;
+    nominated?: boolean;
+    priority?: number;
+    readable?: boolean;
+    remoteCandidateId?: string;
+    roundTripTime?: number;
+    state?: RTCStatsIceCandidatePairState;
+    transportId?: string;
+    writable?: boolean;
+}
+
+interface RTCIceGatherOptions {
+    gatherPolicy?: RTCIceGatherPolicy;
+    iceservers?: RTCIceServer[];
+    portRange?: MSPortRange;
+}
+
+interface RTCIceParameters {
+    iceLite?: boolean;
+    password?: string;
+    usernameFragment?: string;
+}
+
+interface RTCIceServer {
+    credential?: string;
+    urls?: any;
+    username?: string;
+}
+
+interface RTCInboundRTPStreamStats extends RTCRTPStreamStats {
+    bytesReceived?: number;
+    fractionLost?: number;
+    jitter?: number;
+    packetsLost?: number;
+    packetsReceived?: number;
+}
+
+interface RTCMediaStreamTrackStats extends RTCStats {
+    audioLevel?: number;
+    echoReturnLoss?: number;
+    echoReturnLossEnhancement?: number;
+    frameHeight?: number;
+    framesCorrupted?: number;
+    framesDecoded?: number;
+    framesDropped?: number;
+    framesPerSecond?: number;
+    framesReceived?: number;
+    framesSent?: number;
+    frameWidth?: number;
+    remoteSource?: boolean;
+    ssrcIds?: string[];
+    trackIdentifier?: string;
+}
+
+interface RTCOfferOptions {
+    iceRestart?: boolean;
+    offerToReceiveAudio?: number;
+    offerToReceiveVideo?: number;
+    voiceActivityDetection?: boolean;
+}
+
+interface RTCOutboundRTPStreamStats extends RTCRTPStreamStats {
+    bytesSent?: number;
+    packetsSent?: number;
+    roundTripTime?: number;
+    targetBitrate?: number;
+}
+
+interface RTCPeerConnectionIceEventInit extends EventInit {
+    candidate?: RTCIceCandidate;
+}
+
+interface RTCRtcpFeedback {
+    parameter?: string;
+    type?: string;
+}
+
+interface RTCRtcpParameters {
+    cname?: string;
+    mux?: boolean;
+    reducedSize?: boolean;
+    ssrc?: number;
+}
+
+interface RTCRtpCapabilities {
+    codecs?: RTCRtpCodecCapability[];
+    fecMechanisms?: string[];
+    headerExtensions?: RTCRtpHeaderExtension[];
+}
+
+interface RTCRtpCodecCapability {
+    clockRate?: number;
+    kind?: string;
+    maxptime?: number;
+    maxSpatialLayers?: number;
+    maxTemporalLayers?: number;
+    name?: string;
+    numChannels?: number;
+    options?: any;
+    parameters?: any;
+    preferredPayloadType?: number;
+    ptime?: number;
+    rtcpFeedback?: RTCRtcpFeedback[];
+    svcMultiStreamSupport?: boolean;
+}
+
+interface RTCRtpCodecParameters {
+    clockRate?: number;
+    maxptime?: number;
+    name?: string;
+    numChannels?: number;
+    parameters?: any;
+    payloadType?: any;
+    ptime?: number;
+    rtcpFeedback?: RTCRtcpFeedback[];
+}
+
+interface RTCRtpContributingSource {
+    audioLevel?: number;
+    csrc?: number;
+    timestamp?: number;
+}
+
+interface RTCRtpEncodingParameters {
+    active?: boolean;
+    codecPayloadType?: number;
+    dependencyEncodingIds?: string[];
+    encodingId?: string;
+    fec?: RTCRtpFecParameters;
+    framerateScale?: number;
+    maxBitrate?: number;
+    maxFramerate?: number;
+    minQuality?: number;
+    priority?: number;
+    resolutionScale?: number;
+    rtx?: RTCRtpRtxParameters;
+    ssrc?: number;
+    ssrcRange?: RTCSsrcRange;
+}
+
+interface RTCRtpFecParameters {
+    mechanism?: string;
+    ssrc?: number;
+}
+
+interface RTCRtpHeaderExtension {
+    kind?: string;
+    preferredEncrypt?: boolean;
+    preferredId?: number;
+    uri?: string;
+}
+
+interface RTCRtpHeaderExtensionParameters {
+    encrypt?: boolean;
+    id?: number;
+    uri?: string;
+}
+
+interface RTCRtpParameters {
+    codecs?: RTCRtpCodecParameters[];
+    degradationPreference?: RTCDegradationPreference;
+    encodings?: RTCRtpEncodingParameters[];
+    headerExtensions?: RTCRtpHeaderExtensionParameters[];
+    muxId?: string;
+    rtcp?: RTCRtcpParameters;
+}
+
+interface RTCRtpRtxParameters {
+    ssrc?: number;
+}
+
+interface RTCRTPStreamStats extends RTCStats {
+    associateStatsId?: string;
+    codecId?: string;
+    firCount?: number;
+    isRemote?: boolean;
+    mediaTrackId?: string;
+    nackCount?: number;
+    pliCount?: number;
+    sliCount?: number;
+    ssrc?: string;
+    transportId?: string;
+}
+
+interface RTCRtpUnhandled {
+    muxId?: string;
+    payloadType?: number;
+    ssrc?: number;
+}
+
+interface RTCSessionDescriptionInit {
+    sdp?: string;
+    type?: RTCSdpType;
+}
+
+interface RTCSrtpKeyParam {
+    keyMethod?: string;
+    keySalt?: string;
+    lifetime?: string;
+    mkiLength?: number;
+    mkiValue?: number;
+}
+
+interface RTCSrtpSdesParameters {
+    cryptoSuite?: string;
+    keyParams?: RTCSrtpKeyParam[];
+    sessionParams?: string[];
+    tag?: number;
+}
+
+interface RTCSsrcRange {
+    max?: number;
+    min?: number;
+}
+
+interface RTCStats {
+    id?: string;
+    msType?: MSStatsType;
+    timestamp?: number;
+    type?: RTCStatsType;
+}
+
+interface RTCStatsReport {
+}
+
+interface RTCTransportStats extends RTCStats {
+    activeConnection?: boolean;
+    bytesReceived?: number;
+    bytesSent?: number;
+    localCertificateId?: string;
+    remoteCertificateId?: string;
+    rtcpTransportStatsId?: string;
+    selectedCandidatePairId?: string;
+}
+
+interface ScopedCredentialDescriptor {
+    id?: any;
+    transports?: Transport[];
+    type?: ScopedCredentialType;
+}
+
+interface ScopedCredentialOptions {
+    excludeList?: ScopedCredentialDescriptor[];
+    extensions?: WebAuthnExtensions;
+    rpId?: USVString;
+    timeoutSeconds?: number;
+}
+
+interface ScopedCredentialParameters {
+    algorithm?: string | Algorithm;
+    type?: ScopedCredentialType;
+}
+
+interface ServiceWorkerMessageEventInit extends EventInit {
+    data?: any;
+    lastEventId?: string;
+    origin?: string;
+    ports?: MessagePort[];
+    source?: ServiceWorker | MessagePort;
+}
+
+interface SpeechSynthesisEventInit extends EventInit {
+    charIndex?: number;
+    elapsedTime?: number;
+    name?: string;
+    utterance?: SpeechSynthesisUtterance;
+}
+
+interface StoreExceptionsInformation extends ExceptionInformation {
+    detailURI?: string;
+    explanationString?: string;
+    siteName?: string;
+}
+
+interface StoreSiteSpecificExceptionsInformation extends StoreExceptionsInformation {
+    arrayOfDomainStrings?: string[];
+}
+
+interface TrackEventInit extends EventInit {
+    track?: VideoTrack | AudioTrack | TextTrack;
+}
+
+interface TransitionEventInit extends EventInit {
+    elapsedTime?: number;
+    propertyName?: string;
+}
+
+interface UIEventInit extends EventInit {
+    detail?: number;
+    view?: Window;
+}
+
+interface WebAuthnExtensions {
+}
+
+interface WebGLContextAttributes {
+    failIfMajorPerformanceCaveat?: boolean;
+    alpha?: boolean;
+    antialias?: boolean;
+    depth?: boolean;
+    premultipliedAlpha?: boolean;
+    preserveDrawingBuffer?: boolean;
+    stencil?: boolean;
+}
+
+interface WebGLContextEventInit extends EventInit {
+    statusMessage?: string;
+}
+
+interface WheelEventInit extends MouseEventInit {
+    deltaMode?: number;
+    deltaX?: number;
+    deltaY?: number;
+    deltaZ?: number;
+}
+
+interface EventListener {
+    (evt: Event): void;
+}
+
+interface WebKitEntriesCallback {
+    (evt: Event): void;
+}
+
+interface WebKitErrorCallback {
+    (evt: Event): void;
+}
+
+interface WebKitFileCallback {
+    (evt: Event): void;
+}
+
+interface AnalyserNode extends AudioNode {
+    fftSize: number;
+    readonly frequencyBinCount: number;
+    maxDecibels: number;
+    minDecibels: number;
+    smoothingTimeConstant: number;
+    getByteFrequencyData(array: Uint8Array): void;
+    getByteTimeDomainData(array: Uint8Array): void;
+    getFloatFrequencyData(array: Float32Array): void;
+    getFloatTimeDomainData(array: Float32Array): void;
+}
+
+declare var AnalyserNode: {
+    prototype: AnalyserNode;
+    new(): AnalyserNode;
+};
+
+interface ANGLE_instanced_arrays {
+    drawArraysInstancedANGLE(mode: number, first: number, count: number, primcount: number): void;
+    drawElementsInstancedANGLE(mode: number, count: number, type: number, offset: number, primcount: number): void;
+    vertexAttribDivisorANGLE(index: number, divisor: number): void;
+    readonly VERTEX_ATTRIB_ARRAY_DIVISOR_ANGLE: number;
+}
+
+declare var ANGLE_instanced_arrays: {
+    prototype: ANGLE_instanced_arrays;
+    new(): ANGLE_instanced_arrays;
+    readonly VERTEX_ATTRIB_ARRAY_DIVISOR_ANGLE: number;
+};
+
+interface AnimationEvent extends Event {
+    readonly animationName: string;
+    readonly elapsedTime: number;
+    initAnimationEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, animationNameArg: string, elapsedTimeArg: number): void;
+}
+
+declare var AnimationEvent: {
+    prototype: AnimationEvent;
+    new(typeArg: string, eventInitDict?: AnimationEventInit): AnimationEvent;
+};
+
+interface ApplicationCacheEventMap {
+    "cached": Event;
+    "checking": Event;
+    "downloading": Event;
+    "error": Event;
+    "noupdate": Event;
+    "obsolete": Event;
+    "progress": ProgressEvent;
+    "updateready": Event;
+}
+
+interface ApplicationCache extends EventTarget {
+    oncached: (this: ApplicationCache, ev: Event) => any;
+    onchecking: (this: ApplicationCache, ev: Event) => any;
+    ondownloading: (this: ApplicationCache, ev: Event) => any;
+    onerror: (this: ApplicationCache, ev: Event) => any;
+    onnoupdate: (this: ApplicationCache, ev: Event) => any;
+    onobsolete: (this: ApplicationCache, ev: Event) => any;
+    onprogress: (this: ApplicationCache, ev: ProgressEvent) => any;
+    onupdateready: (this: ApplicationCache, ev: Event) => any;
+    readonly status: number;
+    abort(): void;
+    swapCache(): void;
+    update(): void;
+    readonly CHECKING: number;
+    readonly DOWNLOADING: number;
+    readonly IDLE: number;
+    readonly OBSOLETE: number;
+    readonly UNCACHED: number;
+    readonly UPDATEREADY: number;
+    addEventListener<K extends keyof ApplicationCacheEventMap>(type: K, listener: (this: ApplicationCache, ev: ApplicationCacheEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var ApplicationCache: {
+    prototype: ApplicationCache;
+    new(): ApplicationCache;
+    readonly CHECKING: number;
+    readonly DOWNLOADING: number;
+    readonly IDLE: number;
+    readonly OBSOLETE: number;
+    readonly UNCACHED: number;
+    readonly UPDATEREADY: number;
+};
+
+interface Attr extends Node {
+    readonly name: string;
+    readonly ownerElement: Element;
+    readonly prefix: string | null;
+    readonly specified: boolean;
+    value: string;
+}
+
+declare var Attr: {
+    prototype: Attr;
+    new(): Attr;
+};
+
+interface AudioBuffer {
+    readonly duration: number;
+    readonly length: number;
+    readonly numberOfChannels: number;
+    readonly sampleRate: number;
+    copyFromChannel(destination: Float32Array, channelNumber: number, startInChannel?: number): void;
+    copyToChannel(source: Float32Array, channelNumber: number, startInChannel?: number): void;
+    getChannelData(channel: number): Float32Array;
+}
+
+declare var AudioBuffer: {
+    prototype: AudioBuffer;
+    new(): AudioBuffer;
+};
+
+interface AudioBufferSourceNodeEventMap {
+    "ended": MediaStreamErrorEvent;
+}
+
+interface AudioBufferSourceNode extends AudioNode {
+    buffer: AudioBuffer | null;
+    readonly detune: AudioParam;
+    loop: boolean;
+    loopEnd: number;
+    loopStart: number;
+    onended: (this: AudioBufferSourceNode, ev: MediaStreamErrorEvent) => any;
+    readonly playbackRate: AudioParam;
+    start(when?: number, offset?: number, duration?: number): void;
+    stop(when?: number): void;
+    addEventListener<K extends keyof AudioBufferSourceNodeEventMap>(type: K, listener: (this: AudioBufferSourceNode, ev: AudioBufferSourceNodeEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var AudioBufferSourceNode: {
+    prototype: AudioBufferSourceNode;
+    new(): AudioBufferSourceNode;
+};
+
+interface AudioContextEventMap {
+    "statechange": Event;
+}
+
+interface AudioContextBase extends EventTarget {
+    readonly currentTime: number;
+    readonly destination: AudioDestinationNode;
+    readonly listener: AudioListener;
+    onstatechange: (this: AudioContext, ev: Event) => any;
+    readonly sampleRate: number;
+    readonly state: AudioContextState;
+    close(): Promise<void>;
+    createAnalyser(): AnalyserNode;
+    createBiquadFilter(): BiquadFilterNode;
+    createBuffer(numberOfChannels: number, length: number, sampleRate: number): AudioBuffer;
+    createBufferSource(): AudioBufferSourceNode;
+    createChannelMerger(numberOfInputs?: number): ChannelMergerNode;
+    createChannelSplitter(numberOfOutputs?: number): ChannelSplitterNode;
+    createConvolver(): ConvolverNode;
+    createDelay(maxDelayTime?: number): DelayNode;
+    createDynamicsCompressor(): DynamicsCompressorNode;
+    createGain(): GainNode;
+    createIIRFilter(feedforward: number[], feedback: number[]): IIRFilterNode;
+    createMediaElementSource(mediaElement: HTMLMediaElement): MediaElementAudioSourceNode;
+    createMediaStreamSource(mediaStream: MediaStream): MediaStreamAudioSourceNode;
+    createOscillator(): OscillatorNode;
+    createPanner(): PannerNode;
+    createPeriodicWave(real: Float32Array, imag: Float32Array, constraints?: PeriodicWaveConstraints): PeriodicWave;
+    createScriptProcessor(bufferSize?: number, numberOfInputChannels?: number, numberOfOutputChannels?: number): ScriptProcessorNode;
+    createStereoPanner(): StereoPannerNode;
+    createWaveShaper(): WaveShaperNode;
+    decodeAudioData(audioData: ArrayBuffer, successCallback?: DecodeSuccessCallback, errorCallback?: DecodeErrorCallback): Promise<AudioBuffer>;
+    resume(): Promise<void>;
+    addEventListener<K extends keyof AudioContextEventMap>(type: K, listener: (this: AudioContext, ev: AudioContextEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+interface AudioContext extends AudioContextBase {
+    suspend(): Promise<void>;
+}
+
+declare var AudioContext: {
+    prototype: AudioContext;
+    new(): AudioContext;
+};
+
+interface AudioDestinationNode extends AudioNode {
+    readonly maxChannelCount: number;
+}
+
+declare var AudioDestinationNode: {
+    prototype: AudioDestinationNode;
+    new(): AudioDestinationNode;
+};
+
+interface AudioListener {
+    dopplerFactor: number;
+    speedOfSound: number;
+    setOrientation(x: number, y: number, z: number, xUp: number, yUp: number, zUp: number): void;
+    setPosition(x: number, y: number, z: number): void;
+    setVelocity(x: number, y: number, z: number): void;
+}
+
+declare var AudioListener: {
+    prototype: AudioListener;
+    new(): AudioListener;
+};
+
+interface AudioNode extends EventTarget {
+    channelCount: number;
+    channelCountMode: ChannelCountMode;
+    channelInterpretation: ChannelInterpretation;
+    readonly context: AudioContext;
+    readonly numberOfInputs: number;
+    readonly numberOfOutputs: number;
+    connect(destination: AudioNode, output?: number, input?: number): AudioNode;
+    connect(destination: AudioParam, output?: number): void;
+    disconnect(output?: number): void;
+    disconnect(destination: AudioNode, output?: number, input?: number): void;
+    disconnect(destination: AudioParam, output?: number): void;
+}
+
+declare var AudioNode: {
+    prototype: AudioNode;
+    new(): AudioNode;
+};
+
+interface AudioParam {
+    readonly defaultValue: number;
+    value: number;
+    cancelScheduledValues(startTime: number): AudioParam;
+    exponentialRampToValueAtTime(value: number, endTime: number): AudioParam;
+    linearRampToValueAtTime(value: number, endTime: number): AudioParam;
+    setTargetAtTime(target: number, startTime: number, timeConstant: number): AudioParam;
+    setValueAtTime(value: number, startTime: number): AudioParam;
+    setValueCurveAtTime(values: Float32Array, startTime: number, duration: number): AudioParam;
+}
+
+declare var AudioParam: {
+    prototype: AudioParam;
+    new(): AudioParam;
+};
+
+interface AudioProcessingEvent extends Event {
+    readonly inputBuffer: AudioBuffer;
+    readonly outputBuffer: AudioBuffer;
+    readonly playbackTime: number;
+}
+
+declare var AudioProcessingEvent: {
+    prototype: AudioProcessingEvent;
+    new(): AudioProcessingEvent;
+};
+
+interface AudioTrack {
+    enabled: boolean;
+    readonly id: string;
+    kind: string;
+    readonly label: string;
+    language: string;
+    readonly sourceBuffer: SourceBuffer;
+}
+
+declare var AudioTrack: {
+    prototype: AudioTrack;
+    new(): AudioTrack;
+};
+
+interface AudioTrackListEventMap {
+    "addtrack": TrackEvent;
+    "change": Event;
+    "removetrack": TrackEvent;
+}
+
+interface AudioTrackList extends EventTarget {
+    readonly length: number;
+    onaddtrack: (this: AudioTrackList, ev: TrackEvent) => any;
+    onchange: (this: AudioTrackList, ev: Event) => any;
+    onremovetrack: (this: AudioTrackList, ev: TrackEvent) => any;
+    getTrackById(id: string): AudioTrack | null;
+    item(index: number): AudioTrack;
+    addEventListener<K extends keyof AudioTrackListEventMap>(type: K, listener: (this: AudioTrackList, ev: AudioTrackListEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+    [index: number]: AudioTrack;
+}
+
+declare var AudioTrackList: {
+    prototype: AudioTrackList;
+    new(): AudioTrackList;
+};
+
+interface BarProp {
+    readonly visible: boolean;
+}
+
+declare var BarProp: {
+    prototype: BarProp;
+    new(): BarProp;
+};
+
+interface BeforeUnloadEvent extends Event {
+    returnValue: any;
+}
+
+declare var BeforeUnloadEvent: {
+    prototype: BeforeUnloadEvent;
+    new(): BeforeUnloadEvent;
+};
+
+interface BiquadFilterNode extends AudioNode {
+    readonly detune: AudioParam;
+    readonly frequency: AudioParam;
+    readonly gain: AudioParam;
+    readonly Q: AudioParam;
+    type: BiquadFilterType;
+    getFrequencyResponse(frequencyHz: Float32Array, magResponse: Float32Array, phaseResponse: Float32Array): void;
+}
+
+declare var BiquadFilterNode: {
+    prototype: BiquadFilterNode;
+    new(): BiquadFilterNode;
+};
+
+interface Blob {
+    readonly size: number;
+    readonly type: string;
+    msClose(): void;
+    msDetachStream(): any;
+    slice(start?: number, end?: number, contentType?: string): Blob;
+}
+
+declare var Blob: {
+    prototype: Blob;
+    new (blobParts?: any[], options?: BlobPropertyBag): Blob;
+};
+
+interface Cache {
+    add(request: RequestInfo): Promise<void>;
+    addAll(requests: RequestInfo[]): Promise<void>;
+    delete(request: RequestInfo, options?: CacheQueryOptions): Promise<boolean>;
+    keys(request?: RequestInfo, options?: CacheQueryOptions): any;
+    match(request: RequestInfo, options?: CacheQueryOptions): Promise<Response>;
+    matchAll(request?: RequestInfo, options?: CacheQueryOptions): any;
+    put(request: RequestInfo, response: Response): Promise<void>;
+}
+
+declare var Cache: {
+    prototype: Cache;
+    new(): Cache;
+};
+
+interface CacheStorage {
+    delete(cacheName: string): Promise<boolean>;
+    has(cacheName: string): Promise<boolean>;
+    keys(): any;
+    match(request: RequestInfo, options?: CacheQueryOptions): Promise<any>;
+    open(cacheName: string): Promise<Cache>;
+}
+
+declare var CacheStorage: {
+    prototype: CacheStorage;
+    new(): CacheStorage;
+};
+
+interface CanvasGradient {
+    addColorStop(offset: number, color: string): void;
+}
+
+declare var CanvasGradient: {
+    prototype: CanvasGradient;
+    new(): CanvasGradient;
+};
+
+interface CanvasPattern {
+    setTransform(matrix: SVGMatrix): void;
+}
+
+declare var CanvasPattern: {
+    prototype: CanvasPattern;
+    new(): CanvasPattern;
+};
+
+interface CanvasRenderingContext2D extends Object, CanvasPathMethods {
+    readonly canvas: HTMLCanvasElement;
+    fillStyle: string | CanvasGradient | CanvasPattern;
+    font: string;
+    globalAlpha: number;
+    globalCompositeOperation: string;
+    imageSmoothingEnabled: boolean;
+    lineCap: string;
+    lineDashOffset: number;
+    lineJoin: string;
+    lineWidth: number;
+    miterLimit: number;
+    msFillRule: CanvasFillRule;
+    shadowBlur: number;
+    shadowColor: string;
+    shadowOffsetX: number;
+    shadowOffsetY: number;
+    strokeStyle: string | CanvasGradient | CanvasPattern;
+    textAlign: string;
+    textBaseline: string;
+    mozImageSmoothingEnabled: boolean;
+    webkitImageSmoothingEnabled: boolean;
+    oImageSmoothingEnabled: boolean;
+    beginPath(): void;
+    clearRect(x: number, y: number, w: number, h: number): void;
+    clip(fillRule?: CanvasFillRule): void;
+    createImageData(imageDataOrSw: number | ImageData, sh?: number): ImageData;
+    createLinearGradient(x0: number, y0: number, x1: number, y1: number): CanvasGradient;
+    createPattern(image: HTMLImageElement | HTMLCanvasElement | HTMLVideoElement, repetition: string): CanvasPattern;
+    createRadialGradient(x0: number, y0: number, r0: number, x1: number, y1: number, r1: number): CanvasGradient;
+    drawFocusIfNeeded(element: Element): void;
+    drawImage(image: HTMLImageElement | HTMLCanvasElement | HTMLVideoElement | ImageBitmap, dstX: number, dstY: number): void;
+    drawImage(image: HTMLImageElement | HTMLCanvasElement | HTMLVideoElement | ImageBitmap, dstX: number, dstY: number, dstW: number, dstH: number): void;
+    drawImage(image: HTMLImageElement | HTMLCanvasElement | HTMLVideoElement | ImageBitmap, srcX: number, srcY: number, srcW: number, srcH: number, dstX: number, dstY: number, dstW: number, dstH: number): void;
+    fill(fillRule?: CanvasFillRule): void;
+    fillRect(x: number, y: number, w: number, h: number): void;
+    fillText(text: string, x: number, y: number, maxWidth?: number): void;
+    getImageData(sx: number, sy: number, sw: number, sh: number): ImageData;
+    getLineDash(): number[];
+    isPointInPath(x: number, y: number, fillRule?: CanvasFillRule): boolean;
+    measureText(text: string): TextMetrics;
+    putImageData(imagedata: ImageData, dx: number, dy: number, dirtyX?: number, dirtyY?: number, dirtyWidth?: number, dirtyHeight?: number): void;
+    restore(): void;
+    rotate(angle: number): void;
+    save(): void;
+    scale(x: number, y: number): void;
+    setLineDash(segments: number[]): void;
+    setTransform(m11: number, m12: number, m21: number, m22: number, dx: number, dy: number): void;
+    stroke(path?: Path2D): void;
+    strokeRect(x: number, y: number, w: number, h: number): void;
+    strokeText(text: string, x: number, y: number, maxWidth?: number): void;
+    transform(m11: number, m12: number, m21: number, m22: number, dx: number, dy: number): void;
+    translate(x: number, y: number): void;
+}
+
+declare var CanvasRenderingContext2D: {
+    prototype: CanvasRenderingContext2D;
+    new(): CanvasRenderingContext2D;
+};
+
+interface CDATASection extends Text {
+}
+
+declare var CDATASection: {
+    prototype: CDATASection;
+    new(): CDATASection;
+};
+
+interface ChannelMergerNode extends AudioNode {
+}
+
+declare var ChannelMergerNode: {
+    prototype: ChannelMergerNode;
+    new(): ChannelMergerNode;
+};
+
+interface ChannelSplitterNode extends AudioNode {
+}
+
+declare var ChannelSplitterNode: {
+    prototype: ChannelSplitterNode;
+    new(): ChannelSplitterNode;
+};
+
+interface CharacterData extends Node, ChildNode {
+    data: string;
+    readonly length: number;
+    appendData(arg: string): void;
+    deleteData(offset: number, count: number): void;
+    insertData(offset: number, arg: string): void;
+    replaceData(offset: number, count: number, arg: string): void;
+    substringData(offset: number, count: number): string;
+}
+
+declare var CharacterData: {
+    prototype: CharacterData;
+    new(): CharacterData;
+};
+
+interface ClientRect {
+    bottom: number;
+    readonly height: number;
+    left: number;
+    right: number;
+    top: number;
+    readonly width: number;
+}
+
+declare var ClientRect: {
+    prototype: ClientRect;
+    new(): ClientRect;
+};
+
+interface ClientRectList {
+    readonly length: number;
+    item(index: number): ClientRect;
+    [index: number]: ClientRect;
+}
+
+declare var ClientRectList: {
+    prototype: ClientRectList;
+    new(): ClientRectList;
+};
+
+interface ClipboardEvent extends Event {
+    readonly clipboardData: DataTransfer;
+}
+
+declare var ClipboardEvent: {
+    prototype: ClipboardEvent;
+    new(type: string, eventInitDict?: ClipboardEventInit): ClipboardEvent;
+};
+
+interface CloseEvent extends Event {
+    readonly code: number;
+    readonly reason: string;
+    readonly wasClean: boolean;
+    initCloseEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, wasCleanArg: boolean, codeArg: number, reasonArg: string): void;
+}
+
+declare var CloseEvent: {
+    prototype: CloseEvent;
+    new(typeArg: string, eventInitDict?: CloseEventInit): CloseEvent;
+};
+
+interface Comment extends CharacterData {
+    text: string;
+}
+
+declare var Comment: {
+    prototype: Comment;
+    new(): Comment;
+};
+
+interface CompositionEvent extends UIEvent {
+    readonly data: string;
+    readonly locale: string;
+    initCompositionEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, dataArg: string, locale: string): void;
+}
+
+declare var CompositionEvent: {
+    prototype: CompositionEvent;
+    new(typeArg: string, eventInitDict?: CompositionEventInit): CompositionEvent;
+};
+
+interface Console {
+    assert(test?: boolean, message?: string, ...optionalParams: any[]): void;
+    clear(): void;
+    count(countTitle?: string): void;
+    debug(message?: any, ...optionalParams: any[]): void;
+    dir(value?: any, ...optionalParams: any[]): void;
+    dirxml(value: any): void;
+    error(message?: any, ...optionalParams: any[]): void;
+    exception(message?: string, ...optionalParams: any[]): void;
+    group(groupTitle?: string, ...optionalParams: any[]): void;
+    groupCollapsed(groupTitle?: string, ...optionalParams: any[]): void;
+    groupEnd(): void;
+    info(message?: any, ...optionalParams: any[]): void;
+    log(message?: any, ...optionalParams: any[]): void;
+    msIsIndependentlyComposed(element: Element): boolean;
+    profile(reportName?: string): void;
+    profileEnd(): void;
+    select(element: Element): void;
+    table(...data: any[]): void;
+    time(timerName?: string): void;
+    timeEnd(timerName?: string): void;
+    trace(message?: any, ...optionalParams: any[]): void;
+    warn(message?: any, ...optionalParams: any[]): void;
+}
+
+declare var Console: {
+    prototype: Console;
+    new(): Console;
+};
+
+interface ConvolverNode extends AudioNode {
+    buffer: AudioBuffer | null;
+    normalize: boolean;
+}
+
+declare var ConvolverNode: {
+    prototype: ConvolverNode;
+    new(): ConvolverNode;
+};
+
+interface Coordinates {
+    readonly accuracy: number;
+    readonly altitude: number | null;
+    readonly altitudeAccuracy: number | null;
+    readonly heading: number | null;
+    readonly latitude: number;
+    readonly longitude: number;
+    readonly speed: number | null;
+}
+
+declare var Coordinates: {
+    prototype: Coordinates;
+    new(): Coordinates;
+};
+
+interface Crypto extends Object, RandomSource {
+    readonly subtle: SubtleCrypto;
+}
+
+declare var Crypto: {
+    prototype: Crypto;
+    new(): Crypto;
+};
+
+interface CryptoKey {
+    readonly algorithm: KeyAlgorithm;
+    readonly extractable: boolean;
+    readonly type: string;
+    readonly usages: string[];
+}
+
+declare var CryptoKey: {
+    prototype: CryptoKey;
+    new(): CryptoKey;
+};
+
+interface CryptoKeyPair {
+    privateKey: CryptoKey;
+    publicKey: CryptoKey;
+}
+
+declare var CryptoKeyPair: {
+    prototype: CryptoKeyPair;
+    new(): CryptoKeyPair;
+};
+
+interface CSS {
+    supports(property: string, value?: string): boolean;
+}
+declare var CSS: CSS;
+
+interface CSSConditionRule extends CSSGroupingRule {
+    conditionText: string;
+}
+
+declare var CSSConditionRule: {
+    prototype: CSSConditionRule;
+    new(): CSSConditionRule;
+};
+
+interface CSSFontFaceRule extends CSSRule {
+    readonly style: CSSStyleDeclaration;
+}
+
+declare var CSSFontFaceRule: {
+    prototype: CSSFontFaceRule;
+    new(): CSSFontFaceRule;
+};
+
+interface CSSGroupingRule extends CSSRule {
+    readonly cssRules: CSSRuleList;
+    deleteRule(index: number): void;
+    insertRule(rule: string, index: number): number;
+}
+
+declare var CSSGroupingRule: {
+    prototype: CSSGroupingRule;
+    new(): CSSGroupingRule;
+};
+
+interface CSSImportRule extends CSSRule {
+    readonly href: string;
+    readonly media: MediaList;
+    readonly styleSheet: CSSStyleSheet;
+}
+
+declare var CSSImportRule: {
+    prototype: CSSImportRule;
+    new(): CSSImportRule;
+};
+
+interface CSSKeyframeRule extends CSSRule {
+    keyText: string;
+    readonly style: CSSStyleDeclaration;
+}
+
+declare var CSSKeyframeRule: {
+    prototype: CSSKeyframeRule;
+    new(): CSSKeyframeRule;
+};
+
+interface CSSKeyframesRule extends CSSRule {
+    readonly cssRules: CSSRuleList;
+    name: string;
+    appendRule(rule: string): void;
+    deleteRule(rule: string): void;
+    findRule(rule: string): CSSKeyframeRule;
+}
+
+declare var CSSKeyframesRule: {
+    prototype: CSSKeyframesRule;
+    new(): CSSKeyframesRule;
+};
+
+interface CSSMediaRule extends CSSConditionRule {
+    readonly media: MediaList;
+}
+
+declare var CSSMediaRule: {
+    prototype: CSSMediaRule;
+    new(): CSSMediaRule;
+};
+
+interface CSSNamespaceRule extends CSSRule {
+    readonly namespaceURI: string;
+    readonly prefix: string;
+}
+
+declare var CSSNamespaceRule: {
+    prototype: CSSNamespaceRule;
+    new(): CSSNamespaceRule;
+};
+
+interface CSSPageRule extends CSSRule {
+    readonly pseudoClass: string;
+    readonly selector: string;
+    selectorText: string;
+    readonly style: CSSStyleDeclaration;
+}
+
+declare var CSSPageRule: {
+    prototype: CSSPageRule;
+    new(): CSSPageRule;
+};
+
+interface CSSRule {
+    cssText: string;
+    readonly parentRule: CSSRule;
+    readonly parentStyleSheet: CSSStyleSheet;
+    readonly type: number;
+    readonly CHARSET_RULE: number;
+    readonly FONT_FACE_RULE: number;
+    readonly IMPORT_RULE: number;
+    readonly KEYFRAME_RULE: number;
+    readonly KEYFRAMES_RULE: number;
+    readonly MEDIA_RULE: number;
+    readonly NAMESPACE_RULE: number;
+    readonly PAGE_RULE: number;
+    readonly STYLE_RULE: number;
+    readonly SUPPORTS_RULE: number;
+    readonly UNKNOWN_RULE: number;
+    readonly VIEWPORT_RULE: number;
+}
+
+declare var CSSRule: {
+    prototype: CSSRule;
+    new(): CSSRule;
+    readonly CHARSET_RULE: number;
+    readonly FONT_FACE_RULE: number;
+    readonly IMPORT_RULE: number;
+    readonly KEYFRAME_RULE: number;
+    readonly KEYFRAMES_RULE: number;
+    readonly MEDIA_RULE: number;
+    readonly NAMESPACE_RULE: number;
+    readonly PAGE_RULE: number;
+    readonly STYLE_RULE: number;
+    readonly SUPPORTS_RULE: number;
+    readonly UNKNOWN_RULE: number;
+    readonly VIEWPORT_RULE: number;
+};
+
+interface CSSRuleList {
+    readonly length: number;
+    item(index: number): CSSRule;
+    [index: number]: CSSRule;
+}
+
+declare var CSSRuleList: {
+    prototype: CSSRuleList;
+    new(): CSSRuleList;
+};
+
+interface CSSStyleDeclaration {
+    alignContent: string | null;
+    alignItems: string | null;
+    alignmentBaseline: string | null;
+    alignSelf: string | null;
+    animation: string | null;
+    animationDelay: string | null;
+    animationDirection: string | null;
+    animationDuration: string | null;
+    animationFillMode: string | null;
+    animationIterationCount: string | null;
+    animationName: string | null;
+    animationPlayState: string | null;
+    animationTimingFunction: string | null;
+    backfaceVisibility: string | null;
+    background: string | null;
+    backgroundAttachment: string | null;
+    backgroundClip: string | null;
+    backgroundColor: string | null;
+    backgroundImage: string | null;
+    backgroundOrigin: string | null;
+    backgroundPosition: string | null;
+    backgroundPositionX: string | null;
+    backgroundPositionY: string | null;
+    backgroundRepeat: string | null;
+    backgroundSize: string | null;
+    baselineShift: string | null;
+    border: string | null;
+    borderBottom: string | null;
+    borderBottomColor: string | null;
+    borderBottomLeftRadius: string | null;
+    borderBottomRightRadius: string | null;
+    borderBottomStyle: string | null;
+    borderBottomWidth: string | null;
+    borderCollapse: string | null;
+    borderColor: string | null;
+    borderImage: string | null;
+    borderImageOutset: string | null;
+    borderImageRepeat: string | null;
+    borderImageSlice: string | null;
+    borderImageSource: string | null;
+    borderImageWidth: string | null;
+    borderLeft: string | null;
+    borderLeftColor: string | null;
+    borderLeftStyle: string | null;
+    borderLeftWidth: string | null;
+    borderRadius: string | null;
+    borderRight: string | null;
+    borderRightColor: string | null;
+    borderRightStyle: string | null;
+    borderRightWidth: string | null;
+    borderSpacing: string | null;
+    borderStyle: string | null;
+    borderTop: string | null;
+    borderTopColor: string | null;
+    borderTopLeftRadius: string | null;
+    borderTopRightRadius: string | null;
+    borderTopStyle: string | null;
+    borderTopWidth: string | null;
+    borderWidth: string | null;
+    bottom: string | null;
+    boxShadow: string | null;
+    boxSizing: string | null;
+    breakAfter: string | null;
+    breakBefore: string | null;
+    breakInside: string | null;
+    captionSide: string | null;
+    clear: string | null;
+    clip: string | null;
+    clipPath: string | null;
+    clipRule: string | null;
+    color: string | null;
+    colorInterpolationFilters: string | null;
+    columnCount: any;
+    columnFill: string | null;
+    columnGap: any;
+    columnRule: string | null;
+    columnRuleColor: any;
+    columnRuleStyle: string | null;
+    columnRuleWidth: any;
+    columns: string | null;
+    columnSpan: string | null;
+    columnWidth: any;
+    content: string | null;
+    counterIncrement: string | null;
+    counterReset: string | null;
+    cssFloat: string | null;
+    cssText: string;
+    cursor: string | null;
+    direction: string | null;
+    display: string | null;
+    dominantBaseline: string | null;
+    emptyCells: string | null;
+    enableBackground: string | null;
+    fill: string | null;
+    fillOpacity: string | null;
+    fillRule: string | null;
+    filter: string | null;
+    flex: string | null;
+    flexBasis: string | null;
+    flexDirection: string | null;
+    flexFlow: string | null;
+    flexGrow: string | null;
+    flexShrink: string | null;
+    flexWrap: string | null;
+    floodColor: string | null;
+    floodOpacity: string | null;
+    font: string | null;
+    fontFamily: string | null;
+    fontFeatureSettings: string | null;
+    fontSize: string | null;
+    fontSizeAdjust: string | null;
+    fontStretch: string | null;
+    fontStyle: string | null;
+    fontVariant: string | null;
+    fontWeight: string | null;
+    glyphOrientationHorizontal: string | null;
+    glyphOrientationVertical: string | null;
+    height: string | null;
+    imeMode: string | null;
+    justifyContent: string | null;
+    kerning: string | null;
+    layoutGrid: string | null;
+    layoutGridChar: string | null;
+    layoutGridLine: string | null;
+    layoutGridMode: string | null;
+    layoutGridType: string | null;
+    left: string | null;
+    readonly length: number;
+    letterSpacing: string | null;
+    lightingColor: string | null;
+    lineBreak: string | null;
+    lineHeight: string | null;
+    listStyle: string | null;
+    listStyleImage: string | null;
+    listStylePosition: string | null;
+    listStyleType: string | null;
+    margin: string | null;
+    marginBottom: string | null;
+    marginLeft: string | null;
+    marginRight: string | null;
+    marginTop: string | null;
+    marker: string | null;
+    markerEnd: string | null;
+    markerMid: string | null;
+    markerStart: string | null;
+    mask: string | null;
+    maxHeight: string | null;
+    maxWidth: string | null;
+    minHeight: string | null;
+    minWidth: string | null;
+    msContentZoomChaining: string | null;
+    msContentZooming: string | null;
+    msContentZoomLimit: string | null;
+    msContentZoomLimitMax: any;
+    msContentZoomLimitMin: any;
+    msContentZoomSnap: string | null;
+    msContentZoomSnapPoints: string | null;
+    msContentZoomSnapType: string | null;
+    msFlowFrom: string | null;
+    msFlowInto: string | null;
+    msFontFeatureSettings: string | null;
+    msGridColumn: any;
+    msGridColumnAlign: string | null;
+    msGridColumns: string | null;
+    msGridColumnSpan: any;
+    msGridRow: any;
+    msGridRowAlign: string | null;
+    msGridRows: string | null;
+    msGridRowSpan: any;
+    msHighContrastAdjust: string | null;
+    msHyphenateLimitChars: string | null;
+    msHyphenateLimitLines: any;
+    msHyphenateLimitZone: any;
+    msHyphens: string | null;
+    msImeAlign: string | null;
+    msOverflowStyle: string | null;
+    msScrollChaining: string | null;
+    msScrollLimit: string | null;
+    msScrollLimitXMax: any;
+    msScrollLimitXMin: any;
+    msScrollLimitYMax: any;
+    msScrollLimitYMin: any;
+    msScrollRails: string | null;
+    msScrollSnapPointsX: string | null;
+    msScrollSnapPointsY: string | null;
+    msScrollSnapType: string | null;
+    msScrollSnapX: string | null;
+    msScrollSnapY: string | null;
+    msScrollTranslation: string | null;
+    msTextCombineHorizontal: string | null;
+    msTextSizeAdjust: any;
+    msTouchAction: string | null;
+    msTouchSelect: string | null;
+    msUserSelect: string | null;
+    msWrapFlow: string;
+    msWrapMargin: any;
+    msWrapThrough: string;
+    opacity: string | null;
+    order: string | null;
+    orphans: string | null;
+    outline: string | null;
+    outlineColor: string | null;
+    outlineOffset: string | null;
+    outlineStyle: string | null;
+    outlineWidth: string | null;
+    overflow: string | null;
+    overflowX: string | null;
+    overflowY: string | null;
+    padding: string | null;
+    paddingBottom: string | null;
+    paddingLeft: string | null;
+    paddingRight: string | null;
+    paddingTop: string | null;
+    pageBreakAfter: string | null;
+    pageBreakBefore: string | null;
+    pageBreakInside: string | null;
+    readonly parentRule: CSSRule;
+    perspective: string | null;
+    perspectiveOrigin: string | null;
+    pointerEvents: string | null;
+    position: string | null;
+    quotes: string | null;
+    right: string | null;
+    rotate: string | null;
+    rubyAlign: string | null;
+    rubyOverhang: string | null;
+    rubyPosition: string | null;
+    scale: string | null;
+    stopColor: string | null;
+    stopOpacity: string | null;
+    stroke: string | null;
+    strokeDasharray: string | null;
+    strokeDashoffset: string | null;
+    strokeLinecap: string | null;
+    strokeLinejoin: string | null;
+    strokeMiterlimit: string | null;
+    strokeOpacity: string | null;
+    strokeWidth: string | null;
+    tableLayout: string | null;
+    textAlign: string | null;
+    textAlignLast: string | null;
+    textAnchor: string | null;
+    textDecoration: string | null;
+    textIndent: string | null;
+    textJustify: string | null;
+    textKashida: string | null;
+    textKashidaSpace: string | null;
+    textOverflow: string | null;
+    textShadow: string | null;
+    textTransform: string | null;
+    textUnderlinePosition: string | null;
+    top: string | null;
+    touchAction: string | null;
+    transform: string | null;
+    transformOrigin: string | null;
+    transformStyle: string | null;
+    transition: string | null;
+    transitionDelay: string | null;
+    transitionDuration: string | null;
+    transitionProperty: string | null;
+    transitionTimingFunction: string | null;
+    translate: string | null;
+    unicodeBidi: string | null;
+    verticalAlign: string | null;
+    visibility: string | null;
+    webkitAlignContent: string | null;
+    webkitAlignItems: string | null;
+    webkitAlignSelf: string | null;
+    webkitAnimation: string | null;
+    webkitAnimationDelay: string | null;
+    webkitAnimationDirection: string | null;
+    webkitAnimationDuration: string | null;
+    webkitAnimationFillMode: string | null;
+    webkitAnimationIterationCount: string | null;
+    webkitAnimationName: string | null;
+    webkitAnimationPlayState: string | null;
+    webkitAnimationTimingFunction: string | null;
+    webkitAppearance: string | null;
+    webkitBackfaceVisibility: string | null;
+    webkitBackgroundClip: string | null;
+    webkitBackgroundOrigin: string | null;
+    webkitBackgroundSize: string | null;
+    webkitBorderBottomLeftRadius: string | null;
+    webkitBorderBottomRightRadius: string | null;
+    webkitBorderImage: string | null;
+    webkitBorderRadius: string | null;
+    webkitBorderTopLeftRadius: string | null;
+    webkitBorderTopRightRadius: string | null;
+    webkitBoxAlign: string | null;
+    webkitBoxDirection: string | null;
+    webkitBoxFlex: string | null;
+    webkitBoxOrdinalGroup: string | null;
+    webkitBoxOrient: string | null;
+    webkitBoxPack: string | null;
+    webkitBoxSizing: string | null;
+    webkitColumnBreakAfter: string | null;
+    webkitColumnBreakBefore: string | null;
+    webkitColumnBreakInside: string | null;
+    webkitColumnCount: any;
+    webkitColumnGap: any;
+    webkitColumnRule: string | null;
+    webkitColumnRuleColor: any;
+    webkitColumnRuleStyle: string | null;
+    webkitColumnRuleWidth: any;
+    webkitColumns: string | null;
+    webkitColumnSpan: string | null;
+    webkitColumnWidth: any;
+    webkitFilter: string | null;
+    webkitFlex: string | null;
+    webkitFlexBasis: string | null;
+    webkitFlexDirection: string | null;
+    webkitFlexFlow: string | null;
+    webkitFlexGrow: string | null;
+    webkitFlexShrink: string | null;
+    webkitFlexWrap: string | null;
+    webkitJustifyContent: string | null;
+    webkitOrder: string | null;
+    webkitPerspective: string | null;
+    webkitPerspectiveOrigin: string | null;
+    webkitTapHighlightColor: string | null;
+    webkitTextFillColor: string | null;
+    webkitTextSizeAdjust: any;
+    webkitTextStroke: string | null;
+    webkitTextStrokeColor: string | null;
+    webkitTextStrokeWidth: string | null;
+    webkitTransform: string | null;
+    webkitTransformOrigin: string | null;
+    webkitTransformStyle: string | null;
+    webkitTransition: string | null;
+    webkitTransitionDelay: string | null;
+    webkitTransitionDuration: string | null;
+    webkitTransitionProperty: string | null;
+    webkitTransitionTimingFunction: string | null;
+    webkitUserModify: string | null;
+    webkitUserSelect: string | null;
+    webkitWritingMode: string | null;
+    whiteSpace: string | null;
+    widows: string | null;
+    width: string | null;
+    wordBreak: string | null;
+    wordSpacing: string | null;
+    wordWrap: string | null;
+    writingMode: string | null;
+    zIndex: string | null;
+    zoom: string | null;
+    resize: string | null;
+    userSelect: string | null;
+    getPropertyPriority(propertyName: string): string;
+    getPropertyValue(propertyName: string): string;
+    item(index: number): string;
+    removeProperty(propertyName: string): string;
+    setProperty(propertyName: string, value: string | null, priority?: string): void;
+    [index: number]: string;
+}
+
+declare var CSSStyleDeclaration: {
+    prototype: CSSStyleDeclaration;
+    new(): CSSStyleDeclaration;
+};
+
+interface CSSStyleRule extends CSSRule {
+    readonly readOnly: boolean;
+    selectorText: string;
+    readonly style: CSSStyleDeclaration;
+}
+
+declare var CSSStyleRule: {
+    prototype: CSSStyleRule;
+    new(): CSSStyleRule;
+};
+
+interface CSSStyleSheet extends StyleSheet {
+    readonly cssRules: CSSRuleList;
+    cssText: string;
+    readonly id: string;
+    readonly imports: StyleSheetList;
+    readonly isAlternate: boolean;
+    readonly isPrefAlternate: boolean;
+    readonly ownerRule: CSSRule;
+    readonly owningElement: Element;
+    readonly pages: StyleSheetPageList;
+    readonly readOnly: boolean;
+    readonly rules: CSSRuleList;
+    addImport(bstrURL: string, lIndex?: number): number;
+    addPageRule(bstrSelector: string, bstrStyle: string, lIndex?: number): number;
+    addRule(bstrSelector: string, bstrStyle?: string, lIndex?: number): number;
+    deleteRule(index?: number): void;
+    insertRule(rule: string, index?: number): number;
+    removeImport(lIndex: number): void;
+    removeRule(lIndex: number): void;
+}
+
+declare var CSSStyleSheet: {
+    prototype: CSSStyleSheet;
+    new(): CSSStyleSheet;
+};
+
+interface CSSSupportsRule extends CSSConditionRule {
+}
+
+declare var CSSSupportsRule: {
+    prototype: CSSSupportsRule;
+    new(): CSSSupportsRule;
+};
+
+interface CustomEvent extends Event {
+    readonly detail: any;
+    initCustomEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, detailArg: any): void;
+}
+
+declare var CustomEvent: {
+    prototype: CustomEvent;
+    new(typeArg: string, eventInitDict?: CustomEventInit): CustomEvent;
+};
+
+interface DataCue extends TextTrackCue {
+    data: ArrayBuffer;
+    addEventListener<K extends keyof TextTrackCueEventMap>(type: K, listener: (this: DataCue, ev: TextTrackCueEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var DataCue: {
+    prototype: DataCue;
+    new(): DataCue;
+};
+
+interface DataTransfer {
+    dropEffect: string;
+    effectAllowed: string;
+    readonly files: FileList;
+    readonly items: DataTransferItemList;
+    readonly types: string[];
+    clearData(format?: string): boolean;
+    getData(format: string): string;
+    setData(format: string, data: string): boolean;
+    setDragImage(image: Element, x: number, y: number): void;
+}
+
+declare var DataTransfer: {
+    prototype: DataTransfer;
+    new(): DataTransfer;
+};
+
+interface DataTransferItem {
+    readonly kind: string;
+    readonly type: string;
+    getAsFile(): File | null;
+    getAsString(_callback: FunctionStringCallback | null): void;
+    webkitGetAsEntry(): any;
+}
+
+declare var DataTransferItem: {
+    prototype: DataTransferItem;
+    new(): DataTransferItem;
+};
+
+interface DataTransferItemList {
+    readonly length: number;
+    add(data: File): DataTransferItem | null;
+    clear(): void;
+    item(index: number): DataTransferItem;
+    remove(index: number): void;
+    [index: number]: DataTransferItem;
+}
+
+declare var DataTransferItemList: {
+    prototype: DataTransferItemList;
+    new(): DataTransferItemList;
+};
+
+interface DeferredPermissionRequest {
+    readonly id: number;
+    readonly type: MSWebViewPermissionType;
+    readonly uri: string;
+    allow(): void;
+    deny(): void;
+}
+
+declare var DeferredPermissionRequest: {
+    prototype: DeferredPermissionRequest;
+    new(): DeferredPermissionRequest;
+};
+
+interface DelayNode extends AudioNode {
+    readonly delayTime: AudioParam;
+}
+
+declare var DelayNode: {
+    prototype: DelayNode;
+    new(): DelayNode;
+};
+
+interface DeviceAcceleration {
+    readonly x: number | null;
+    readonly y: number | null;
+    readonly z: number | null;
+}
+
+declare var DeviceAcceleration: {
+    prototype: DeviceAcceleration;
+    new(): DeviceAcceleration;
+};
+
+interface DeviceLightEvent extends Event {
+    readonly value: number;
+}
+
+declare var DeviceLightEvent: {
+    prototype: DeviceLightEvent;
+    new(typeArg: string, eventInitDict?: DeviceLightEventInit): DeviceLightEvent;
+};
+
+interface DeviceMotionEvent extends Event {
+    readonly acceleration: DeviceAcceleration | null;
+    readonly accelerationIncludingGravity: DeviceAcceleration | null;
+    readonly interval: number | null;
+    readonly rotationRate: DeviceRotationRate | null;
+    initDeviceMotionEvent(type: string, bubbles: boolean, cancelable: boolean, acceleration: DeviceAccelerationDict | null, accelerationIncludingGravity: DeviceAccelerationDict | null, rotationRate: DeviceRotationRateDict | null, interval: number | null): void;
+}
+
+declare var DeviceMotionEvent: {
+    prototype: DeviceMotionEvent;
+    new(typeArg: string, eventInitDict?: DeviceMotionEventInit): DeviceMotionEvent;
+};
+
+interface DeviceOrientationEvent extends Event {
+    readonly absolute: boolean;
+    readonly alpha: number | null;
+    readonly beta: number | null;
+    readonly gamma: number | null;
+    initDeviceOrientationEvent(type: string, bubbles: boolean, cancelable: boolean, alpha: number | null, beta: number | null, gamma: number | null, absolute: boolean): void;
+}
+
+declare var DeviceOrientationEvent: {
+    prototype: DeviceOrientationEvent;
+    new(typeArg: string, eventInitDict?: DeviceOrientationEventInit): DeviceOrientationEvent;
+};
+
+interface DeviceRotationRate {
+    readonly alpha: number | null;
+    readonly beta: number | null;
+    readonly gamma: number | null;
+}
+
+declare var DeviceRotationRate: {
+    prototype: DeviceRotationRate;
+    new(): DeviceRotationRate;
+};
+
+interface DocumentEventMap extends GlobalEventHandlersEventMap {
+    "abort": UIEvent;
+    "activate": UIEvent;
+    "beforeactivate": UIEvent;
+    "beforedeactivate": UIEvent;
+    "blur": FocusEvent;
+    "canplay": Event;
+    "canplaythrough": Event;
+    "change": Event;
+    "click": MouseEvent;
+    "contextmenu": PointerEvent;
+    "dblclick": MouseEvent;
+    "deactivate": UIEvent;
+    "drag": DragEvent;
+    "dragend": DragEvent;
+    "dragenter": DragEvent;
+    "dragleave": DragEvent;
+    "dragover": DragEvent;
+    "dragstart": DragEvent;
+    "drop": DragEvent;
+    "durationchange": Event;
+    "emptied": Event;
+    "ended": MediaStreamErrorEvent;
+    "error": ErrorEvent;
+    "focus": FocusEvent;
+    "fullscreenchange": Event;
+    "fullscreenerror": Event;
+    "input": Event;
+    "invalid": Event;
+    "keydown": KeyboardEvent;
+    "keypress": KeyboardEvent;
+    "keyup": KeyboardEvent;
+    "load": Event;
+    "loadeddata": Event;
+    "loadedmetadata": Event;
+    "loadstart": Event;
+    "mousedown": MouseEvent;
+    "mousemove": MouseEvent;
+    "mouseout": MouseEvent;
+    "mouseover": MouseEvent;
+    "mouseup": MouseEvent;
+    "mousewheel": WheelEvent;
+    "MSContentZoom": UIEvent;
+    "MSGestureChange": MSGestureEvent;
+    "MSGestureDoubleTap": MSGestureEvent;
+    "MSGestureEnd": MSGestureEvent;
+    "MSGestureHold": MSGestureEvent;
+    "MSGestureStart": MSGestureEvent;
+    "MSGestureTap": MSGestureEvent;
+    "MSInertiaStart": MSGestureEvent;
+    "MSManipulationStateChanged": MSManipulationEvent;
+    "MSPointerCancel": MSPointerEvent;
+    "MSPointerDown": MSPointerEvent;
+    "MSPointerEnter": MSPointerEvent;
+    "MSPointerLeave": MSPointerEvent;
+    "MSPointerMove": MSPointerEvent;
+    "MSPointerOut": MSPointerEvent;
+    "MSPointerOver": MSPointerEvent;
+    "MSPointerUp": MSPointerEvent;
+    "mssitemodejumplistitemremoved": MSSiteModeEvent;
+    "msthumbnailclick": MSSiteModeEvent;
+    "pause": Event;
+    "play": Event;
+    "playing": Event;
+    "pointerlockchange": Event;
+    "pointerlockerror": Event;
+    "progress": ProgressEvent;
+    "ratechange": Event;
+    "readystatechange": Event;
+    "reset": Event;
+    "scroll": UIEvent;
+    "seeked": Event;
+    "seeking": Event;
+    "select": UIEvent;
+    "selectionchange": Event;
+    "selectstart": Event;
+    "stalled": Event;
+    "stop": Event;
+    "submit": Event;
+    "suspend": Event;
+    "timeupdate": Event;
+    "touchcancel": TouchEvent;
+    "touchend": TouchEvent;
+    "touchmove": TouchEvent;
+    "touchstart": TouchEvent;
+    "volumechange": Event;
+    "waiting": Event;
+    "webkitfullscreenchange": Event;
+    "webkitfullscreenerror": Event;
+}
+
+interface Document extends Node, GlobalEventHandlers, NodeSelector, DocumentEvent, ParentNode, DocumentOrShadowRoot {
+    /**
+     * Gets the object that has the focus when the parent document has focus.
+     */
+    readonly activeElement: Element;
+    /**
+     * Sets or gets the color of all active links in the document.
+     */
+    alinkColor: string;
+    /**
+     * Returns a reference to the collection of elements contained by the object.
+     */
+    readonly all: HTMLAllCollection;
+    /**
+     * Retrieves a collection of all a objects that have a name and/or id property. Objects in this collection are in HTML source order.
+     */
+    anchors: HTMLCollectionOf<HTMLAnchorElement>;
+    /**
+     * Retrieves a collection of all applet objects in the document.
+     */
+    applets: HTMLCollectionOf<HTMLAppletElement>;
+    /**
+     * Deprecated. Sets or retrieves a value that indicates the background color behind the object.
+     */
+    bgColor: string;
+    /**
+     * Specifies the beginning and end of the document body.
+     */
+    body: HTMLElement;
+    readonly characterSet: string;
+    /**
+     * Gets or sets the character set used to encode the object.
+     */
+    charset: string;
+    /**
+     * Gets a value that indicates whether standards-compliant mode is switched on for the object.
+     */
+    readonly compatMode: string;
+    cookie: string;
+    readonly currentScript: HTMLScriptElement | SVGScriptElement;
+    readonly defaultView: Window;
+    /**
+     * Sets or gets a value that indicates whether the document can be edited.
+     */
+    designMode: string;
+    /**
+     * Sets or retrieves a value that indicates the reading order of the object.
+     */
+    dir: string;
+    /**
+     * Gets an object representing the document type declaration associated with the current document.
+     */
+    readonly doctype: DocumentType;
+    /**
+     * Gets a reference to the root node of the document.
+     */
+    documentElement: HTMLElement;
+    /**
+     * Sets or gets the security domain of the document.
+     */
+    domain: string;
+    /**
+     * Retrieves a collection of all embed objects in the document.
+     */
+    embeds: HTMLCollectionOf<HTMLEmbedElement>;
+    /**
+     * Sets or gets the foreground (text) color of the document.
+     */
+    fgColor: string;
+    /**
+     * Retrieves a collection, in source order, of all form objects in the document.
+     */
+    forms: HTMLCollectionOf<HTMLFormElement>;
+    readonly fullscreenElement: Element | null;
+    readonly fullscreenEnabled: boolean;
+    readonly head: HTMLHeadElement;
+    readonly hidden: boolean;
+    /**
+     * Retrieves a collection, in source order, of img objects in the document.
+     */
+    images: HTMLCollectionOf<HTMLImageElement>;
+    /**
+     * Gets the implementation object of the current document.
+     */
+    readonly implementation: DOMImplementation;
+    /**
+     * Returns the character encoding used to create the webpage that is loaded into the document object.
+     */
+    readonly inputEncoding: string | null;
+    /**
+     * Gets the date that the page was last modified, if the page supplies one.
+     */
+    readonly lastModified: string;
+    /**
+     * Sets or gets the color of the document links.
+     */
+    linkColor: string;
+    /**
+     * Retrieves a collection of all a objects that specify the href property and all area objects in the document.
+     */
+    links: HTMLCollectionOf<HTMLAnchorElement | HTMLAreaElement>;
+    /**
+     * Contains information about the current URL.
+     */
+    readonly location: Location;
+    msCapsLockWarningOff: boolean;
+    msCSSOMElementFloatMetrics: boolean;
+    /**
+     * Fires when the user aborts the download.
+     * @param ev The event.
+     */
+    onabort: (this: Document, ev: UIEvent) => any;
+    /**
+     * Fires when the object is set as the active element.
+     * @param ev The event.
+     */
+    onactivate: (this: Document, ev: UIEvent) => any;
+    /**
+     * Fires immediately before the object is set as the active element.
+     * @param ev The event.
+     */
+    onbeforeactivate: (this: Document, ev: UIEvent) => any;
+    /**
+     * Fires immediately before the activeElement is changed from the current object to another object in the parent document.
+     * @param ev The event.
+     */
+    onbeforedeactivate: (this: Document, ev: UIEvent) => any;
+    /**
+     * Fires when the object loses the input focus.
+     * @param ev The focus event.
+     */
+    onblur: (this: Document, ev: FocusEvent) => any;
+    /**
+     * Occurs when playback is possible, but would require further buffering.
+     * @param ev The event.
+     */
+    oncanplay: (this: Document, ev: Event) => any;
+    oncanplaythrough: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the contents of the object or selection have changed.
+     * @param ev The event.
+     */
+    onchange: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the user clicks the left mouse button on the object
+     * @param ev The mouse event.
+     */
+    onclick: (this: Document, ev: MouseEvent) => any;
+    /**
+     * Fires when the user clicks the right mouse button in the client area, opening the context menu.
+     * @param ev The mouse event.
+     */
+    oncontextmenu: (this: Document, ev: PointerEvent) => any;
+    /**
+     * Fires when the user double-clicks the object.
+     * @param ev The mouse event.
+     */
+    ondblclick: (this: Document, ev: MouseEvent) => any;
+    /**
+     * Fires when the activeElement is changed from the current object to another object in the parent document.
+     * @param ev The UI Event
+     */
+    ondeactivate: (this: Document, ev: UIEvent) => any;
+    /**
+     * Fires on the source object continuously during a drag operation.
+     * @param ev The event.
+     */
+    ondrag: (this: Document, ev: DragEvent) => any;
+    /**
+     * Fires on the source object when the user releases the mouse at the close of a drag operation.
+     * @param ev The event.
+     */
+    ondragend: (this: Document, ev: DragEvent) => any;
+    /**
+     * Fires on the target element when the user drags the object to a valid drop target.
+     * @param ev The drag event.
+     */
+    ondragenter: (this: Document, ev: DragEvent) => any;
+    /**
+     * Fires on the target object when the user moves the mouse out of a valid drop target during a drag operation.
+     * @param ev The drag event.
+     */
+    ondragleave: (this: Document, ev: DragEvent) => any;
+    /**
+     * Fires on the target element continuously while the user drags the object over a valid drop target.
+     * @param ev The event.
+     */
+    ondragover: (this: Document, ev: DragEvent) => any;
+    /**
+     * Fires on the source object when the user starts to drag a text selection or selected object.
+     * @param ev The event.
+     */
+    ondragstart: (this: Document, ev: DragEvent) => any;
+    ondrop: (this: Document, ev: DragEvent) => any;
+    /**
+     * Occurs when the duration attribute is updated.
+     * @param ev The event.
+     */
+    ondurationchange: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when the media element is reset to its initial state.
+     * @param ev The event.
+     */
+    onemptied: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when the end of playback is reached.
+     * @param ev The event
+     */
+    onended: (this: Document, ev: MediaStreamErrorEvent) => any;
+    /**
+     * Fires when an error occurs during object loading.
+     * @param ev The event.
+     */
+    onerror: (this: Document, ev: ErrorEvent) => any;
+    /**
+     * Fires when the object receives focus.
+     * @param ev The event.
+     */
+    onfocus: (this: Document, ev: FocusEvent) => any;
+    onfullscreenchange: (this: Document, ev: Event) => any;
+    onfullscreenerror: (this: Document, ev: Event) => any;
+    oninput: (this: Document, ev: Event) => any;
+    oninvalid: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the user presses a key.
+     * @param ev The keyboard event
+     */
+    onkeydown: (this: Document, ev: KeyboardEvent) => any;
+    /**
+     * Fires when the user presses an alphanumeric key.
+     * @param ev The event.
+     */
+    onkeypress: (this: Document, ev: KeyboardEvent) => any;
+    /**
+     * Fires when the user releases a key.
+     * @param ev The keyboard event
+     */
+    onkeyup: (this: Document, ev: KeyboardEvent) => any;
+    /**
+     * Fires immediately after the browser loads the object.
+     * @param ev The event.
+     */
+    onload: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when media data is loaded at the current playback position.
+     * @param ev The event.
+     */
+    onloadeddata: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when the duration and dimensions of the media have been determined.
+     * @param ev The event.
+     */
+    onloadedmetadata: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when Internet Explorer begins looking for media data.
+     * @param ev The event.
+     */
+    onloadstart: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the user clicks the object with either mouse button.
+     * @param ev The mouse event.
+     */
+    onmousedown: (this: Document, ev: MouseEvent) => any;
+    /**
+     * Fires when the user moves the mouse over the object.
+     * @param ev The mouse event.
+     */
+    onmousemove: (this: Document, ev: MouseEvent) => any;
+    /**
+     * Fires when the user moves the mouse pointer outside the boundaries of the object.
+     * @param ev The mouse event.
+     */
+    onmouseout: (this: Document, ev: MouseEvent) => any;
+    /**
+     * Fires when the user moves the mouse pointer into the object.
+     * @param ev The mouse event.
+     */
+    onmouseover: (this: Document, ev: MouseEvent) => any;
+    /**
+     * Fires when the user releases a mouse button while the mouse is over the object.
+     * @param ev The mouse event.
+     */
+    onmouseup: (this: Document, ev: MouseEvent) => any;
+    /**
+     * Fires when the wheel button is rotated.
+     * @param ev The mouse event
+     */
+    onmousewheel: (this: Document, ev: WheelEvent) => any;
+    onmscontentzoom: (this: Document, ev: UIEvent) => any;
+    onmsgesturechange: (this: Document, ev: MSGestureEvent) => any;
+    onmsgesturedoubletap: (this: Document, ev: MSGestureEvent) => any;
+    onmsgestureend: (this: Document, ev: MSGestureEvent) => any;
+    onmsgesturehold: (this: Document, ev: MSGestureEvent) => any;
+    onmsgesturestart: (this: Document, ev: MSGestureEvent) => any;
+    onmsgesturetap: (this: Document, ev: MSGestureEvent) => any;
+    onmsinertiastart: (this: Document, ev: MSGestureEvent) => any;
+    onmsmanipulationstatechanged: (this: Document, ev: MSManipulationEvent) => any;
+    onmspointercancel: (this: Document, ev: MSPointerEvent) => any;
+    onmspointerdown: (this: Document, ev: MSPointerEvent) => any;
+    onmspointerenter: (this: Document, ev: MSPointerEvent) => any;
+    onmspointerleave: (this: Document, ev: MSPointerEvent) => any;
+    onmspointermove: (this: Document, ev: MSPointerEvent) => any;
+    onmspointerout: (this: Document, ev: MSPointerEvent) => any;
+    onmspointerover: (this: Document, ev: MSPointerEvent) => any;
+    onmspointerup: (this: Document, ev: MSPointerEvent) => any;
+    /**
+     * Occurs when an item is removed from a Jump List of a webpage running in Site Mode.
+     * @param ev The event.
+     */
+    onmssitemodejumplistitemremoved: (this: Document, ev: MSSiteModeEvent) => any;
+    /**
+     * Occurs when a user clicks a button in a Thumbnail Toolbar of a webpage running in Site Mode.
+     * @param ev The event.
+     */
+    onmsthumbnailclick: (this: Document, ev: MSSiteModeEvent) => any;
+    /**
+     * Occurs when playback is paused.
+     * @param ev The event.
+     */
+    onpause: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when the play method is requested.
+     * @param ev The event.
+     */
+    onplay: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when the audio or video has started playing.
+     * @param ev The event.
+     */
+    onplaying: (this: Document, ev: Event) => any;
+    onpointerlockchange: (this: Document, ev: Event) => any;
+    onpointerlockerror: (this: Document, ev: Event) => any;
+    /**
+     * Occurs to indicate progress while downloading media data.
+     * @param ev The event.
+     */
+    onprogress: (this: Document, ev: ProgressEvent) => any;
+    /**
+     * Occurs when the playback rate is increased or decreased.
+     * @param ev The event.
+     */
+    onratechange: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the state of the object has changed.
+     * @param ev The event
+     */
+    onreadystatechange: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the user resets a form.
+     * @param ev The event.
+     */
+    onreset: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the user repositions the scroll box in the scroll bar on the object.
+     * @param ev The event.
+     */
+    onscroll: (this: Document, ev: UIEvent) => any;
+    /**
+     * Occurs when the seek operation ends.
+     * @param ev The event.
+     */
+    onseeked: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when the current playback position is moved.
+     * @param ev The event.
+     */
+    onseeking: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the current selection changes.
+     * @param ev The event.
+     */
+    onselect: (this: Document, ev: UIEvent) => any;
+    /**
+     * Fires when the selection state of a document changes.
+     * @param ev The event.
+     */
+    onselectionchange: (this: Document, ev: Event) => any;
+    onselectstart: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when the download has stopped.
+     * @param ev The event.
+     */
+    onstalled: (this: Document, ev: Event) => any;
+    /**
+     * Fires when the user clicks the Stop button or leaves the Web page.
+     * @param ev The event.
+     */
+    onstop: (this: Document, ev: Event) => any;
+    onsubmit: (this: Document, ev: Event) => any;
+    /**
+     * Occurs if the load operation has been intentionally halted.
+     * @param ev The event.
+     */
+    onsuspend: (this: Document, ev: Event) => any;
+    /**
+     * Occurs to indicate the current playback position.
+     * @param ev The event.
+     */
+    ontimeupdate: (this: Document, ev: Event) => any;
+    ontouchcancel: (ev: TouchEvent) => any;
+    ontouchend: (ev: TouchEvent) => any;
+    ontouchmove: (ev: TouchEvent) => any;
+    ontouchstart: (ev: TouchEvent) => any;
+    /**
+     * Occurs when the volume is changed, or playback is muted or unmuted.
+     * @param ev The event.
+     */
+    onvolumechange: (this: Document, ev: Event) => any;
+    /**
+     * Occurs when playback stops because the next frame of a video resource is not available.
+     * @param ev The event.
+     */
+    onwaiting: (this: Document, ev: Event) => any;
+    onwebkitfullscreenchange: (this: Document, ev: Event) => any;
+    onwebkitfullscreenerror: (this: Document, ev: Event) => any;
+    plugins: HTMLCollectionOf<HTMLEmbedElement>;
+    readonly pointerLockElement: Element;
+    /**
+     * Retrieves a value that indicates the current state of the object.
+     */
+    readonly readyState: string;
+    /**
+     * Gets the URL of the location that referred the user to the current page.
+     */
+    readonly referrer: string;
+    /**
+     * Gets the root svg element in the document hierarchy.
+     */
+    readonly rootElement: SVGSVGElement;
+    /**
+     * Retrieves a collection of all script objects in the document.
+     */
+    scripts: HTMLCollectionOf<HTMLScriptElement>;
+    readonly scrollingElement: Element | null;
+    /**
+     * Retrieves a collection of styleSheet objects representing the style sheets that correspond to each instance of a link or style object in the document.
+     */
+    readonly styleSheets: StyleSheetList;
+    /**
+     * Contains the title of the document.
+     */
+    title: string;
+    /**
+     * Sets or gets the URL for the current document.
+     */
+    readonly URL: string;
+    /**
+     * Gets the URL for the document, stripped of any character encoding.
+     */
+    readonly URLUnencoded: string;
+    readonly visibilityState: VisibilityState;
+    /**
+     * Sets or gets the color of the links that the user has visited.
+     */
+    vlinkColor: string;
+    readonly webkitCurrentFullScreenElement: Element | null;
+    readonly webkitFullscreenElement: Element | null;
+    readonly webkitFullscreenEnabled: boolean;
+    readonly webkitIsFullScreen: boolean;
+    readonly xmlEncoding: string | null;
+    xmlStandalone: boolean;
+    /**
+     * Gets or sets the version attribute specified in the declaration of an XML document.
+     */
+    xmlVersion: string | null;
+    adoptNode<T extends Node>(source: T): T;
+    captureEvents(): void;
+    caretRangeFromPoint(x: number, y: number): Range;
+    clear(): void;
+    /**
+     * Closes an output stream and forces the sent data to display.
+     */
+    close(): void;
+    /**
+     * Creates an attribute object with a specified name.
+     * @param name String that sets the attribute object's name.
+     */
+    createAttribute(name: string): Attr;
+    createAttributeNS(namespaceURI: string | null, qualifiedName: string): Attr;
+    createCDATASection(data: string): CDATASection;
+    /**
+     * Creates a comment object with the specified data.
+     * @param data Sets the comment object's data.
+     */
+    createComment(data: string): Comment;
+    /**
+     * Creates a new document.
+     */
+    createDocumentFragment(): DocumentFragment;
+    /**
+     * Creates an instance of the element for the specified tag.
+     * @param tagName The name of an element.
+     */
+    createElement<K extends keyof HTMLElementTagNameMap>(tagName: K): HTMLElementTagNameMap[K];
+    createElement(tagName: string): HTMLElement;
+    createElementNS(namespaceURI: "http://www.w3.org/1999/xhtml", qualifiedName: string): HTMLElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "a"): SVGAElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "circle"): SVGCircleElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "clipPath"): SVGClipPathElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "componentTransferFunction"): SVGComponentTransferFunctionElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "defs"): SVGDefsElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "desc"): SVGDescElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "ellipse"): SVGEllipseElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feBlend"): SVGFEBlendElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feColorMatrix"): SVGFEColorMatrixElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feComponentTransfer"): SVGFEComponentTransferElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feComposite"): SVGFECompositeElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feConvolveMatrix"): SVGFEConvolveMatrixElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feDiffuseLighting"): SVGFEDiffuseLightingElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feDisplacementMap"): SVGFEDisplacementMapElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feDistantLight"): SVGFEDistantLightElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feFlood"): SVGFEFloodElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feFuncA"): SVGFEFuncAElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feFuncB"): SVGFEFuncBElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feFuncG"): SVGFEFuncGElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feFuncR"): SVGFEFuncRElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feGaussianBlur"): SVGFEGaussianBlurElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feImage"): SVGFEImageElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feMerge"): SVGFEMergeElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feMergeNode"): SVGFEMergeNodeElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feMorphology"): SVGFEMorphologyElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feOffset"): SVGFEOffsetElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "fePointLight"): SVGFEPointLightElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feSpecularLighting"): SVGFESpecularLightingElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feSpotLight"): SVGFESpotLightElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feTile"): SVGFETileElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "feTurbulence"): SVGFETurbulenceElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "filter"): SVGFilterElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "foreignObject"): SVGForeignObjectElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "g"): SVGGElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "image"): SVGImageElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "gradient"): SVGGradientElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "line"): SVGLineElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "linearGradient"): SVGLinearGradientElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "marker"): SVGMarkerElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "mask"): SVGMaskElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "path"): SVGPathElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "metadata"): SVGMetadataElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "pattern"): SVGPatternElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "polygon"): SVGPolygonElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "polyline"): SVGPolylineElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "radialGradient"): SVGRadialGradientElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "rect"): SVGRectElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "svg"): SVGSVGElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "script"): SVGScriptElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "stop"): SVGStopElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "style"): SVGStyleElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "switch"): SVGSwitchElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "symbol"): SVGSymbolElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "tspan"): SVGTSpanElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "textContent"): SVGTextContentElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "text"): SVGTextElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "textPath"): SVGTextPathElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "textPositioning"): SVGTextPositioningElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "title"): SVGTitleElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "use"): SVGUseElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: "view"): SVGViewElement;
+    createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: string): SVGElement;
+    createElementNS(namespaceURI: string | null, qualifiedName: string): Element;
+    createExpression(expression: string, resolver: XPathNSResolver): XPathExpression;
+    /**
+     * Creates a NodeIterator object that you can use to traverse filtered lists of nodes or elements in a document.
+     * @param root The root element or node to start traversing on.
+     * @param whatToShow The type of nodes or elements to appear in the node list
+     * @param filter A custom NodeFilter function to use. For more information, see filter. Use null for no filter.
+     * @param entityReferenceExpansion A flag that specifies whether entity reference nodes are expanded.
+     */
+    createNodeIterator(root: Node, whatToShow?: number, filter?: NodeFilter, entityReferenceExpansion?: boolean): NodeIterator;
+    createNSResolver(nodeResolver: Node): XPathNSResolver;
+    createProcessingInstruction(target: string, data: string): ProcessingInstruction;
+    /**
+     *  Returns an empty range object that has both of its boundary points positioned at the beginning of the document.
+     */
+    createRange(): Range;
+    /**
+     * Creates a text string from the specified value.
+     * @param data String that specifies the nodeValue property of the text node.
+     */
+    createTextNode(data: string): Text;
+    createTouch(view: Window, target: EventTarget, identifier: number, pageX: number, pageY: number, screenX: number, screenY: number): Touch;
+    createTouchList(...touches: Touch[]): TouchList;
+    /**
+     * Creates a TreeWalker object that you can use to traverse filtered lists of nodes or elements in a document.
+     * @param root The root element or node to start traversing on.
+     * @param whatToShow The type of nodes or elements to appear in the node list. For more information, see whatToShow.
+     * @param filter A custom NodeFilter function to use.
+     * @param entityReferenceExpansion A flag that specifies whether entity reference nodes are expanded.
+     */
+    createTreeWalker(root: Node, whatToShow?: number, filter?: NodeFilter, entityReferenceExpansion?: boolean): TreeWalker;
+    /**
+     * Returns the element for the specified x coordinate and the specified y coordinate.
+     * @param x The x-offset
+     * @param y The y-offset
+     */
+    elementFromPoint(x: number, y: number): Element;
+    evaluate(expression: string, contextNode: Node, resolver: XPathNSResolver | null, type: number, result: XPathResult | null): XPathResult;
+    /**
+     * Executes a command on the current document, current selection, or the given range.
+     * @param commandId String that specifies the command to execute. This command can be any of the command identifiers that can be executed in script.
+     * @param showUI Display the user interface, defaults to false.
+     * @param value Value to assign.
+     */
+    execCommand(commandId: string, showUI?: boolean, value?: any): boolean;
+    /**
+     * Displays help information for the given command identifier.
+     * @param commandId Displays help information for the given command identifier.
+     */
+    execCommandShowHelp(commandId: string): boolean;
+    exitFullscreen(): void;
+    exitPointerLock(): void;
+    /**
+     * Causes the element to receive the focus and executes the code specified by the onfocus event.
+     */
+    focus(): void;
+    /**
+     * Returns a reference to the first object with the specified value of the ID or NAME attribute.
+     * @param elementId String that specifies the ID value. Case-insensitive.
+     */
+    getElementById(elementId: string): HTMLElement | null;
+    getElementsByClassName(classNames: string): HTMLCollectionOf<Element>;
+    /**
+     * Gets a collection of objects based on the value of the NAME or ID attribute.
+     * @param elementName Gets a collection of objects based on the value of the NAME or ID attribute.
+     */
+    getElementsByName(elementName: string): NodeListOf<HTMLElement>;
+    /**
+     * Retrieves a collection of objects based on the specified element name.
+     * @param name Specifies the name of an element.
+     */
+    getElementsByTagName<K extends keyof ElementListTagNameMap>(tagname: K): ElementListTagNameMap[K];
+    getElementsByTagName(tagname: string): NodeListOf<Element>;
+    getElementsByTagNameNS(namespaceURI: "http://www.w3.org/1999/xhtml", localName: string): HTMLCollectionOf<HTMLElement>;
+    getElementsByTagNameNS(namespaceURI: "http://www.w3.org/2000/svg", localName: string): HTMLCollectionOf<SVGElement>;
+    getElementsByTagNameNS(namespaceURI: string, localName: string): HTMLCollectionOf<Element>;
+    /**
+     * Returns an object representing the current selection of the document that is loaded into the object displaying a webpage.
+     */
+    getSelection(): Selection;
+    /**
+     * Gets a value indicating whether the object currently has focus.
+     */
+    hasFocus(): boolean;
+    importNode<T extends Node>(importedNode: T, deep: boolean): T;
+    msElementsFromPoint(x: number, y: number): NodeListOf<Element>;
+    msElementsFromRect(left: number, top: number, width: number, height: number): NodeListOf<Element>;
+    /**
+     * Opens a new window and loads a document specified by a given URL. Also, opens a new window that uses the url parameter and the name parameter to collect the output of the write method and the writeln method.
+     * @param url Specifies a MIME type for the document.
+     * @param name Specifies the name of the window. This name is used as the value for the TARGET attribute on a form or an anchor element.
+     * @param features Contains a list of items separated by commas. Each item consists of an option and a value, separated by an equals sign (for example, "fullscreen=yes, toolbar=yes"). The following values are supported.
+     * @param replace Specifies whether the existing entry for the document is replaced in the history list.
+     */
+    open(url?: string, name?: string, features?: string, replace?: boolean): Document;
+    /**
+     * Returns a Boolean value that indicates whether a specified command can be successfully executed using execCommand, given the current state of the document.
+     * @param commandId Specifies a command identifier.
+     */
+    queryCommandEnabled(commandId: string): boolean;
+    /**
+     * Returns a Boolean value that indicates whether the specified command is in the indeterminate state.
+     * @param commandId String that specifies a command identifier.
+     */
+    queryCommandIndeterm(commandId: string): boolean;
+    /**
+     * Returns a Boolean value that indicates the current state of the command.
+     * @param commandId String that specifies a command identifier.
+     */
+    queryCommandState(commandId: string): boolean;
+    /**
+     * Returns a Boolean value that indicates whether the current command is supported on the current range.
+     * @param commandId Specifies a command identifier.
+     */
+    queryCommandSupported(commandId: string): boolean;
+    /**
+     * Retrieves the string associated with a command.
+     * @param commandId String that contains the identifier of a command. This can be any command identifier given in the list of Command Identifiers.
+     */
+    queryCommandText(commandId: string): string;
+    /**
+     * Returns the current value of the document, range, or current selection for the given command.
+     * @param commandId String that specifies a command identifier.
+     */
+    queryCommandValue(commandId: string): string;
+    releaseEvents(): void;
+    /**
+     * Allows updating the print settings for the page.
+     */
+    updateSettings(): void;
+    webkitCancelFullScreen(): void;
+    webkitExitFullscreen(): void;
+    /**
+     * Writes one or more HTML expressions to a document in the specified window.
+     * @param content Specifies the text and HTML tags to write.
+     */
+    write(...content: string[]): void;
+    /**
+     * Writes one or more HTML expressions, followed by a carriage return, to a document in the specified window.
+     * @param content The text and HTML tags to write.
+     */
+    writeln(...content: string[]): void;
+    addEventListener<K extends keyof DocumentEventMap>(type: K, listener: (this: Document, ev: DocumentEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var Document: {
+    prototype: Document;
+    new(): Document;
+};
+
+interface DocumentFragment extends Node, NodeSelector, ParentNode {
+    getElementById(elementId: string): HTMLElement | null;
+}
+
+declare var DocumentFragment: {
+    prototype: DocumentFragment;
+    new(): DocumentFragment;
+};
+
+interface DocumentType extends Node, ChildNode {
+    readonly entities: NamedNodeMap;
+    readonly internalSubset: string | null;
+    readonly name: string;
+    readonly notations: NamedNodeMap;
+    readonly publicId: string;
+    readonly systemId: string;
+}
+
+declare var DocumentType: {
+    prototype: DocumentType;
+    new(): DocumentType;
+};
+
+interface DOMError {
+    readonly name: string;
+    toString(): string;
+}
+
+declare var DOMError: {
+    prototype: DOMError;
+    new(): DOMError;
+};
+
+interface DOMException {
+    readonly code: number;
+    readonly message: string;
+    readonly name: string;
+    toString(): string;
+    readonly ABORT_ERR: number;
+    readonly DATA_CLONE_ERR: number;
+    readonly DOMSTRING_SIZE_ERR: number;
+    readonly HIERARCHY_REQUEST_ERR: number;
+    readonly INDEX_SIZE_ERR: number;
+    readonly INUSE_ATTRIBUTE_ERR: number;
+    readonly INVALID_ACCESS_ERR: number;
+    readonly INVALID_CHARACTER_ERR: number;
+    readonly INVALID_MODIFICATION_ERR: number;
+    readonly INVALID_NODE_TYPE_ERR: number;
+    readonly INVALID_STATE_ERR: number;
+    readonly NAMESPACE_ERR: number;
+    readonly NETWORK_ERR: number;
+    readonly NO_DATA_ALLOWED_ERR: number;
+    readonly NO_MODIFICATION_ALLOWED_ERR: number;
+    readonly NOT_FOUND_ERR: number;
+    readonly NOT_SUPPORTED_ERR: number;
+    readonly PARSE_ERR: number;
+    readonly QUOTA_EXCEEDED_ERR: number;
+    readonly SECURITY_ERR: number;
+    readonly SERIALIZE_ERR: number;
+    readonly SYNTAX_ERR: number;
+    readonly TIMEOUT_ERR: number;
+    readonly TYPE_MISMATCH_ERR: number;
+    readonly URL_MISMATCH_ERR: number;
+    readonly VALIDATION_ERR: number;
+    readonly WRONG_DOCUMENT_ERR: number;
+}
+
+declare var DOMException: {
+    prototype: DOMException;
+    new(): DOMException;
+    readonly ABORT_ERR: number;
+    readonly DATA_CLONE_ERR: number;
+    readonly DOMSTRING_SIZE_ERR: number;
+    readonly HIERARCHY_REQUEST_ERR: number;
+    readonly INDEX_SIZE_ERR: number;
+    readonly INUSE_ATTRIBUTE_ERR: number;
+    readonly INVALID_ACCESS_ERR: number;
+    readonly INVALID_CHARACTER_ERR: number;
+    readonly INVALID_MODIFICATION_ERR: number;
+    readonly INVALID_NODE_TYPE_ERR: number;
+    readonly INVALID_STATE_ERR: number;
+    readonly NAMESPACE_ERR: number;
+    readonly NETWORK_ERR: number;
+    readonly NO_DATA_ALLOWED_ERR: number;
+    readonly NO_MODIFICATION_ALLOWED_ERR: number;
+    readonly NOT_FOUND_ERR: number;
+    readonly NOT_SUPPORTED_ERR: number;
+    readonly PARSE_ERR: number;
+    readonly QUOTA_EXCEEDED_ERR: number;
+    readonly SECURITY_ERR: number;
+    readonly SERIALIZE_ERR: number;
+    readonly SYNTAX_ERR: number;
+    readonly TIMEOUT_ERR: number;
+    readonly TYPE_MISMATCH_ERR: number;
+    readonly URL_MISMATCH_ERR: number;
+    readonly VALIDATION_ERR: number;
+    readonly WRONG_DOCUMENT_ERR: number;
+};
+
+interface DOMImplementation {
+    createDocument(namespaceURI: string | null, qualifiedName: string | null, doctype: DocumentType | null): Document;
+    createDocumentType(qualifiedName: string, publicId: string, systemId: string): DocumentType;
+    createHTMLDocument(title: string): Document;
+    hasFeature(feature: string | null, version: string | null): boolean;
+}
+
+declare var DOMImplementation: {
+    prototype: DOMImplementation;
+    new(): DOMImplementation;
+};
+
+interface DOMParser {
+    parseFromString(source: string, mimeType: string): Document;
+}
+
+declare var DOMParser: {
+    prototype: DOMParser;
+    new(): DOMParser;
+};
+
+interface DOMSettableTokenList extends DOMTokenList {
+    value: string;
+}
+
+declare var DOMSettableTokenList: {
+    prototype: DOMSettableTokenList;
+    new(): DOMSettableTokenList;
+};
+
+interface DOMStringList {
+    readonly length: number;
+    contains(str: string): boolean;
+    item(index: number): string | null;
+    [index: number]: string;
+}
+
+declare var DOMStringList: {
+    prototype: DOMStringList;
+    new(): DOMStringList;
+};
+
+interface DOMStringMap {
+    [name: string]: string | undefined;
+}
+
+declare var DOMStringMap: {
+    prototype: DOMStringMap;
+    new(): DOMStringMap;
+};
+
+interface DOMTokenList {
+    readonly length: number;
+    add(...token: string[]): void;
+    contains(token: string): boolean;
+    item(index: number): string;
+    remove(...token: string[]): void;
+    toggle(token: string, force?: boolean): boolean;
+    toString(): string;
+    [index: number]: string;
+}
+
+declare var DOMTokenList: {
+    prototype: DOMTokenList;
+    new(): DOMTokenList;
+};
+
+interface DragEvent extends MouseEvent {
+    readonly dataTransfer: DataTransfer;
+    initDragEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, ctrlKeyArg: boolean, altKeyArg: boolean, shiftKeyArg: boolean, metaKeyArg: boolean, buttonArg: number, relatedTargetArg: EventTarget, dataTransferArg: DataTransfer): void;
+    msConvertURL(file: File, targetType: string, targetURL?: string): void;
+}
+
+declare var DragEvent: {
+    prototype: DragEvent;
+    new(type: "drag" | "dragend" | "dragenter" | "dragexit" | "dragleave" | "dragover" | "dragstart" | "drop", dragEventInit?: { dataTransfer?: DataTransfer }): DragEvent;
+};
+
+interface DynamicsCompressorNode extends AudioNode {
+    readonly attack: AudioParam;
+    readonly knee: AudioParam;
+    readonly ratio: AudioParam;
+    readonly reduction: number;
+    readonly release: AudioParam;
+    readonly threshold: AudioParam;
+}
+
+declare var DynamicsCompressorNode: {
+    prototype: DynamicsCompressorNode;
+    new(): DynamicsCompressorNode;
+};
+
+interface ElementEventMap extends GlobalEventHandlersEventMap {
+    "ariarequest": Event;
+    "command": Event;
+    "gotpointercapture": PointerEvent;
+    "lostpointercapture": PointerEvent;
+    "MSGestureChange": MSGestureEvent;
+    "MSGestureDoubleTap": MSGestureEvent;
+    "MSGestureEnd": MSGestureEvent;
+    "MSGestureHold": MSGestureEvent;
+    "MSGestureStart": MSGestureEvent;
+    "MSGestureTap": MSGestureEvent;
+    "MSGotPointerCapture": MSPointerEvent;
+    "MSInertiaStart": MSGestureEvent;
+    "MSLostPointerCapture": MSPointerEvent;
+    "MSPointerCancel": MSPointerEvent;
+    "MSPointerDown": MSPointerEvent;
+    "MSPointerEnter": MSPointerEvent;
+    "MSPointerLeave": MSPointerEvent;
+    "MSPointerMove": MSPointerEvent;
+    "MSPointerOut": MSPointerEvent;
+    "MSPointerOver": MSPointerEvent;
+    "MSPointerUp": MSPointerEvent;
+    "touchcancel": TouchEvent;
+    "touchend": TouchEvent;
+    "touchmove": TouchEvent;
+    "touchstart": TouchEvent;
+    "webkitfullscreenchange": Event;
+    "webkitfullscreenerror": Event;
+}
+
+interface Element extends Node, GlobalEventHandlers, ElementTraversal, NodeSelector, ChildNode, ParentNode {
+    readonly classList: DOMTokenList;
+    className: string;
+    readonly clientHeight: number;
+    readonly clientLeft: number;
+    readonly clientTop: number;
+    readonly clientWidth: number;
+    id: string;
+    innerHTML: string;
+    msContentZoomFactor: number;
+    readonly msRegionOverflow: string;
+    onariarequest: (this: Element, ev: Event) => any;
+    oncommand: (this: Element, ev: Event) => any;
+    ongotpointercapture: (this: Element, ev: PointerEvent) => any;
+    onlostpointercapture: (this: Element, ev: PointerEvent) => any;
+    onmsgesturechange: (this: Element, ev: MSGestureEvent) => any;
+    onmsgesturedoubletap: (this: Element, ev: MSGestureEvent) => any;
+    onmsgestureend: (this: Element, ev: MSGestureEvent) => any;
+    onmsgesturehold: (this: Element, ev: MSGestureEvent) => any;
+    onmsgesturestart: (this: Element, ev: MSGestureEvent) => any;
+    onmsgesturetap: (this: Element, ev: MSGestureEvent) => any;
+    onmsgotpointercapture: (this: Element, ev: MSPointerEvent) => any;
+    onmsinertiastart: (this: Element, ev: MSGestureEvent) => any;
+    onmslostpointercapture: (this: Element, ev: MSPointerEvent) => any;
+    onmspointercancel: (this: Element, ev: MSPointerEvent) => any;
+    onmspointerdown: (this: Element, ev: MSPointerEvent) => any;
+    onmspointerenter: (this: Element, ev: MSPointerEvent) => any;
+    onmspointerleave: (this: Element, ev: MSPointerEvent) => any;
+    onmspointermove: (this: Element, ev: MSPointerEvent) => any;
+    onmspointerout: (this: Element, ev: MSPointerEvent) => any;
+    onmspointerover: (this: Element, ev: MSPointerEvent) => any;
+    onmspointerup: (this: Element, ev: MSPointerEvent) => any;
+    ontouchcancel: (ev: TouchEvent) => any;
+    ontouchend: (ev: TouchEvent) => any;
+    ontouchmove: (ev: TouchEvent) => any;
+    ontouchstart: (ev: TouchEvent) => any;
+    onwebkitfullscreenchange: (this: Element, ev: Event) => any;
+    onwebkitfullscreenerror: (this: Element, ev: Event) => any;
+    outerHTML: string;
+    readonly prefix: string | null;
+    readonly scrollHeight: number;
+    scrollLeft: number;
+    scrollTop: number;
+    readonly scrollWidth: number;
+    readonly tagName: string;
+    readonly assignedSlot: HTMLSlotElement | null;
+    slot: string;
+    readonly shadowRoot: ShadowRoot | null;
+    getAttribute(name: string): string | null;
+    getAttributeNode(name: string): Attr;
+    getAttributeNodeNS(namespaceURI: string, localName: string): Attr;
+    getAttributeNS(namespaceURI: string, localName: string): string;
+    getBoundingClientRect(): ClientRect;
+    getClientRects(): ClientRectList;
+    getElementsByTagName<K extends keyof ElementListTagNameMap>(name: K): ElementListTagNameMap[K];
+    getElementsByTagName(name: string): NodeListOf<Element>;
+    getElementsByTagNameNS(namespaceURI: "http://www.w3.org/1999/xhtml", localName: string): HTMLCollectionOf<HTMLElement>;
+    getElementsByTagNameNS(namespaceURI: "http://www.w3.org/2000/svg", localName: string): HTMLCollectionOf<SVGElement>;
+    getElementsByTagNameNS(namespaceURI: string, localName: string): HTMLCollectionOf<Element>;
+    hasAttribute(name: string): boolean;
+    hasAttributeNS(namespaceURI: string, localName: string): boolean;
+    msGetRegionContent(): MSRangeCollection;
+    msGetUntransformedBounds(): ClientRect;
+    msMatchesSelector(selectors: string): boolean;
+    msReleasePointerCapture(pointerId: number): void;
+    msSetPointerCapture(pointerId: number): void;
+    msZoomTo(args: MsZoomToOptions): void;
+    releasePointerCapture(pointerId: number): void;
+    removeAttribute(qualifiedName: string): void;
+    removeAttributeNode(oldAttr: Attr): Attr;
+    removeAttributeNS(namespaceURI: string, localName: string): void;
+    requestFullscreen(): void;
+    requestPointerLock(): void;
+    setAttribute(name: string, value: string): void;
+    setAttributeNode(newAttr: Attr): Attr;
+    setAttributeNodeNS(newAttr: Attr): Attr;
+    setAttributeNS(namespaceURI: string, qualifiedName: string, value: string): void;
+    setPointerCapture(pointerId: number): void;
+    webkitMatchesSelector(selectors: string): boolean;
+    webkitRequestFullscreen(): void;
+    webkitRequestFullScreen(): void;
+    getElementsByClassName(classNames: string): NodeListOf<Element>;
+    matches(selector: string): boolean;
+    closest(selector: string): Element | null;
+    scrollIntoView(arg?: boolean | ScrollIntoViewOptions): void;
+    scroll(options?: ScrollToOptions): void;
+    scroll(x: number, y: number): void;
+    scrollTo(options?: ScrollToOptions): void;
+    scrollTo(x: number, y: number): void;
+    scrollBy(options?: ScrollToOptions): void;
+    scrollBy(x: number, y: number): void;
+    insertAdjacentElement(position: InsertPosition, insertedElement: Element): Element | null;
+    insertAdjacentHTML(where: InsertPosition, html: string): void;
+    insertAdjacentText(where: InsertPosition, text: string): void;
+    attachShadow(shadowRootInitDict: ShadowRootInit): ShadowRoot;
+    addEventListener<K extends keyof ElementEventMap>(type: K, listener: (this: Element, ev: ElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var Element: {
+    prototype: Element;
+    new(): Element;
+};
+
+interface ErrorEvent extends Event {
+    readonly colno: number;
+    readonly error: any;
+    readonly filename: string;
+    readonly lineno: number;
+    readonly message: string;
+    initErrorEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, messageArg: string, filenameArg: string, linenoArg: number): void;
+}
+
+declare var ErrorEvent: {
+    prototype: ErrorEvent;
+    new(type: string, errorEventInitDict?: ErrorEventInit): ErrorEvent;
+};
+
+interface Event {
+    readonly bubbles: boolean;
+    readonly cancelable: boolean;
+    cancelBubble: boolean;
+    readonly currentTarget: EventTarget;
+    readonly defaultPrevented: boolean;
+    readonly eventPhase: number;
+    readonly isTrusted: boolean;
+    returnValue: boolean;
+    readonly srcElement: Element | null;
+    readonly target: EventTarget;
+    readonly timeStamp: number;
+    readonly type: string;
+    readonly scoped: boolean;
+    initEvent(eventTypeArg: string, canBubbleArg: boolean, cancelableArg: boolean): void;
+    preventDefault(): void;
+    stopImmediatePropagation(): void;
+    stopPropagation(): void;
+    deepPath(): EventTarget[];
+    readonly AT_TARGET: number;
+    readonly BUBBLING_PHASE: number;
+    readonly CAPTURING_PHASE: number;
+}
+
+declare var Event: {
+    prototype: Event;
+    new(typeArg: string, eventInitDict?: EventInit): Event;
+    readonly AT_TARGET: number;
+    readonly BUBBLING_PHASE: number;
+    readonly CAPTURING_PHASE: number;
+};
+
+interface EventTarget {
+    addEventListener(type: string, listener?: EventListenerOrEventListenerObject, options?: boolean | AddEventListenerOptions): void;
+    dispatchEvent(evt: Event): boolean;
+    removeEventListener(type: string, listener?: EventListenerOrEventListenerObject, options?: boolean | EventListenerOptions): void;
+}
+
+declare var EventTarget: {
+    prototype: EventTarget;
+    new(): EventTarget;
+};
+
+interface EXT_frag_depth {
+}
+
+declare var EXT_frag_depth: {
+    prototype: EXT_frag_depth;
+    new(): EXT_frag_depth;
+};
+
+interface EXT_texture_filter_anisotropic {
+    readonly MAX_TEXTURE_MAX_ANISOTROPY_EXT: number;
+    readonly TEXTURE_MAX_ANISOTROPY_EXT: number;
+}
+
+declare var EXT_texture_filter_anisotropic: {
+    prototype: EXT_texture_filter_anisotropic;
+    new(): EXT_texture_filter_anisotropic;
+    readonly MAX_TEXTURE_MAX_ANISOTROPY_EXT: number;
+    readonly TEXTURE_MAX_ANISOTROPY_EXT: number;
+};
+
+interface ExtensionScriptApis {
+    extensionIdToShortId(extensionId: string): number;
+    fireExtensionApiTelemetry(functionName: string, isSucceeded: boolean, isSupported: boolean): void;
+    genericFunction(routerAddress: any, parameters?: string, callbackId?: number): void;
+    genericSynchronousFunction(functionId: number, parameters?: string): string;
+    getExtensionId(): string;
+    registerGenericFunctionCallbackHandler(callbackHandler: any): void;
+    registerGenericPersistentCallbackHandler(callbackHandler: any): void;
+}
+
+declare var ExtensionScriptApis: {
+    prototype: ExtensionScriptApis;
+    new(): ExtensionScriptApis;
+};
+
+interface External {
+}
+
+declare var External: {
+    prototype: External;
+    new(): External;
+};
+
+interface File extends Blob {
+    readonly lastModifiedDate: any;
+    readonly name: string;
+    readonly webkitRelativePath: string;
+}
+
+declare var File: {
+    prototype: File;
+    new (parts: (ArrayBuffer | ArrayBufferView | Blob | string)[], filename: string, properties?: FilePropertyBag): File;
+};
+
+interface FileList {
+    readonly length: number;
+    item(index: number): File;
+    [index: number]: File;
+}
+
+declare var FileList: {
+    prototype: FileList;
+    new(): FileList;
+};
+
+interface FileReader extends EventTarget, MSBaseReader {
+    readonly error: DOMError;
+    readAsArrayBuffer(blob: Blob): void;
+    readAsBinaryString(blob: Blob): void;
+    readAsDataURL(blob: Blob): void;
+    readAsText(blob: Blob, encoding?: string): void;
+    addEventListener<K extends keyof MSBaseReaderEventMap>(type: K, listener: (this: FileReader, ev: MSBaseReaderEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var FileReader: {
+    prototype: FileReader;
+    new(): FileReader;
+};
+
+interface FocusEvent extends UIEvent {
+    readonly relatedTarget: EventTarget;
+    initFocusEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, relatedTargetArg: EventTarget): void;
+}
+
+declare var FocusEvent: {
+    prototype: FocusEvent;
+    new(typeArg: string, eventInitDict?: FocusEventInit): FocusEvent;
+};
+
+interface FocusNavigationEvent extends Event {
+    readonly navigationReason: NavigationReason;
+    readonly originHeight: number;
+    readonly originLeft: number;
+    readonly originTop: number;
+    readonly originWidth: number;
+    requestFocus(): void;
+}
+
+declare var FocusNavigationEvent: {
+    prototype: FocusNavigationEvent;
+    new(type: string, eventInitDict?: FocusNavigationEventInit): FocusNavigationEvent;
+};
+
+interface FormData {
+    append(name: string, value: string | Blob, fileName?: string): void;
+    delete(name: string): void;
+    get(name: string): FormDataEntryValue | null;
+    getAll(name: string): FormDataEntryValue[];
+    has(name: string): boolean;
+    set(name: string, value: string | Blob, fileName?: string): void;
+}
+
+declare var FormData: {
+    prototype: FormData;
+    new (form?: HTMLFormElement): FormData;
+};
+
+interface GainNode extends AudioNode {
+    readonly gain: AudioParam;
+}
+
+declare var GainNode: {
+    prototype: GainNode;
+    new(): GainNode;
+};
+
+interface Gamepad {
+    readonly axes: number[];
+    readonly buttons: GamepadButton[];
+    readonly connected: boolean;
+    readonly id: string;
+    readonly index: number;
+    readonly mapping: string;
+    readonly timestamp: number;
+}
+
+declare var Gamepad: {
+    prototype: Gamepad;
+    new(): Gamepad;
+};
+
+interface GamepadButton {
+    readonly pressed: boolean;
+    readonly value: number;
+}
+
+declare var GamepadButton: {
+    prototype: GamepadButton;
+    new(): GamepadButton;
+};
+
+interface GamepadEvent extends Event {
+    readonly gamepad: Gamepad;
+}
+
+declare var GamepadEvent: {
+    prototype: GamepadEvent;
+    new(typeArg: string, eventInitDict?: GamepadEventInit): GamepadEvent;
+};
+
+interface Geolocation {
+    clearWatch(watchId: number): void;
+    getCurrentPosition(successCallback: PositionCallback, errorCallback?: PositionErrorCallback, options?: PositionOptions): void;
+    watchPosition(successCallback: PositionCallback, errorCallback?: PositionErrorCallback, options?: PositionOptions): number;
+}
+
+declare var Geolocation: {
+    prototype: Geolocation;
+    new(): Geolocation;
+};
+
+interface HashChangeEvent extends Event {
+    readonly newURL: string | null;
+    readonly oldURL: string | null;
+}
+
+declare var HashChangeEvent: {
+    prototype: HashChangeEvent;
+    new(typeArg: string, eventInitDict?: HashChangeEventInit): HashChangeEvent;
+};
+
+interface Headers {
+    append(name: string, value: string): void;
+    delete(name: string): void;
+    forEach(callback: ForEachCallback): void;
+    get(name: string): string | null;
+    has(name: string): boolean;
+    set(name: string, value: string): void;
+}
+
+declare var Headers: {
+    prototype: Headers;
+    new(init?: any): Headers;
+};
+
+interface History {
+    readonly length: number;
+    readonly state: any;
+    scrollRestoration: ScrollRestoration;
+    back(): void;
+    forward(): void;
+    go(delta?: number): void;
+    pushState(data: any, title: string, url?: string | null): void;
+    replaceState(data: any, title: string, url?: string | null): void;
+}
+
+declare var History: {
+    prototype: History;
+    new(): History;
+};
+
+interface HTMLAllCollection {
+    readonly length: number;
+    item(nameOrIndex?: string): HTMLCollection | Element | null;
+    namedItem(name: string): HTMLCollection | Element | null;
+    [index: number]: Element;
+}
+
+declare var HTMLAllCollection: {
+    prototype: HTMLAllCollection;
+    new(): HTMLAllCollection;
+};
+
+interface HTMLAnchorElement extends HTMLElement {
+    /**
+     * Sets or retrieves the character set used to encode the object.
+     */
+    charset: string;
+    /**
+     * Sets or retrieves the coordinates of the object.
+     */
+    coords: string;
+    download: string;
+    /**
+     * Contains the anchor portion of the URL including the hash sign (#).
+     */
+    hash: string;
+    /**
+     * Contains the hostname and port values of the URL.
+     */
+    host: string;
+    /**
+     * Contains the hostname of a URL.
+     */
+    hostname: string;
+    /**
+     * Sets or retrieves a destination URL or an anchor point.
+     */
+    href: string;
+    /**
+     * Sets or retrieves the language code of the object.
+     */
+    hreflang: string;
+    Methods: string;
+    readonly mimeType: string;
+    /**
+     * Sets or retrieves the shape of the object.
+     */
+    name: string;
+    readonly nameProp: string;
+    /**
+     * Contains the pathname of the URL.
+     */
+    pathname: string;
+    /**
+     * Sets or retrieves the port number associated with a URL.
+     */
+    port: string;
+    /**
+     * Contains the protocol of the URL.
+     */
+    protocol: string;
+    readonly protocolLong: string;
+    /**
+     * Sets or retrieves the relationship between the object and the destination of the link.
+     */
+    rel: string;
+    /**
+     * Sets or retrieves the relationship between the object and the destination of the link.
+     */
+    rev: string;
+    /**
+     * Sets or retrieves the substring of the href property that follows the question mark.
+     */
+    search: string;
+    /**
+     * Sets or retrieves the shape of the object.
+     */
+    shape: string;
+    /**
+     * Sets or retrieves the window or frame at which to target content.
+     */
+    target: string;
+    /**
+     * Retrieves or sets the text of the object as a string.
+     */
+    text: string;
+    type: string;
+    urn: string;
+    /**
+     * Returns a string representation of an object.
+     */
+    toString(): string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLAnchorElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLAnchorElement: {
+    prototype: HTMLAnchorElement;
+    new(): HTMLAnchorElement;
+};
+
+interface HTMLAppletElement extends HTMLElement {
+    align: string;
+    /**
+     * Sets or retrieves a text alternative to the graphic.
+     */
+    alt: string;
+    /**
+     * Gets or sets the optional alternative HTML script to execute if the object fails to load.
+     */
+    altHtml: string;
+    /**
+     * Sets or retrieves a character string that can be used to implement your own archive functionality for the object.
+     */
+    archive: string;
+    /**
+     * Retrieves a string of the URL where the object tag can be found. This is often the href of the document that the object is in, or the value set by a base element.
+     */
+    readonly BaseHref: string;
+    border: string;
+    code: string;
+    /**
+     * Sets or retrieves the URL of the component.
+     */
+    codeBase: string;
+    /**
+     * Sets or retrieves the Internet media type for the code associated with the object.
+     */
+    codeType: string;
+    /**
+     * Address of a pointer to the document this page or frame contains. If there is no document, then null will be returned.
+     */
+    readonly contentDocument: Document;
+    /**
+     * Sets or retrieves the URL that references the data of the object.
+     */
+    data: string;
+    /**
+     * Sets or retrieves a character string that can be used to implement your own declare functionality for the object.
+     */
+    declare: boolean;
+    readonly form: HTMLFormElement;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: string;
+    hspace: number;
+    /**
+     * Sets or retrieves the shape of the object.
+     */
+    name: string;
+    object: string | null;
+    /**
+     * Sets or retrieves a message to be displayed while an object is loading.
+     */
+    standby: string;
+    /**
+     * Returns the content type of the object.
+     */
+    type: string;
+    /**
+     * Sets or retrieves the URL, often with a bookmark extension (#name), to use as a client-side image map.
+     */
+    useMap: string;
+    vspace: number;
+    width: number;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLAppletElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLAppletElement: {
+    prototype: HTMLAppletElement;
+    new(): HTMLAppletElement;
+};
+
+interface HTMLAreaElement extends HTMLElement {
+    /**
+     * Sets or retrieves a text alternative to the graphic.
+     */
+    alt: string;
+    /**
+     * Sets or retrieves the coordinates of the object.
+     */
+    coords: string;
+    download: string;
+    /**
+     * Sets or retrieves the subsection of the href property that follows the number sign (#).
+     */
+    hash: string;
+    /**
+     * Sets or retrieves the hostname and port number of the location or URL.
+     */
+    host: string;
+    /**
+     * Sets or retrieves the host name part of the location or URL.
+     */
+    hostname: string;
+    /**
+     * Sets or retrieves a destination URL or an anchor point.
+     */
+    href: string;
+    /**
+     * Sets or gets whether clicks in this region cause action.
+     */
+    noHref: boolean;
+    /**
+     * Sets or retrieves the file name or path specified by the object.
+     */
+    pathname: string;
+    /**
+     * Sets or retrieves the port number associated with a URL.
+     */
+    port: string;
+    /**
+     * Sets or retrieves the protocol portion of a URL.
+     */
+    protocol: string;
+    rel: string;
+    /**
+     * Sets or retrieves the substring of the href property that follows the question mark.
+     */
+    search: string;
+    /**
+     * Sets or retrieves the shape of the object.
+     */
+    shape: string;
+    /**
+     * Sets or retrieves the window or frame at which to target content.
+     */
+    target: string;
+    /**
+     * Returns a string representation of an object.
+     */
+    toString(): string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLAreaElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLAreaElement: {
+    prototype: HTMLAreaElement;
+    new(): HTMLAreaElement;
+};
+
+interface HTMLAreasCollection extends HTMLCollectionBase {
+}
+
+declare var HTMLAreasCollection: {
+    prototype: HTMLAreasCollection;
+    new(): HTMLAreasCollection;
+};
+
+interface HTMLAudioElement extends HTMLMediaElement {
+    addEventListener<K extends keyof HTMLMediaElementEventMap>(type: K, listener: (this: HTMLAudioElement, ev: HTMLMediaElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLAudioElement: {
+    prototype: HTMLAudioElement;
+    new(): HTMLAudioElement;
+};
+
+interface HTMLBaseElement extends HTMLElement {
+    /**
+     * Gets or sets the baseline URL on which relative links are based.
+     */
+    href: string;
+    /**
+     * Sets or retrieves the window or frame at which to target content.
+     */
+    target: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLBaseElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLBaseElement: {
+    prototype: HTMLBaseElement;
+    new(): HTMLBaseElement;
+};
+
+interface HTMLBaseFontElement extends HTMLElement, DOML2DeprecatedColorProperty {
+    /**
+     * Sets or retrieves the current typeface family.
+     */
+    face: string;
+    /**
+     * Sets or retrieves the font size of the object.
+     */
+    size: number;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLBaseFontElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLBaseFontElement: {
+    prototype: HTMLBaseFontElement;
+    new(): HTMLBaseFontElement;
+};
+
+interface HTMLBodyElementEventMap extends HTMLElementEventMap {
+    "afterprint": Event;
+    "beforeprint": Event;
+    "beforeunload": BeforeUnloadEvent;
+    "blur": FocusEvent;
+    "error": ErrorEvent;
+    "focus": FocusEvent;
+    "hashchange": HashChangeEvent;
+    "load": Event;
+    "message": MessageEvent;
+    "offline": Event;
+    "online": Event;
+    "orientationchange": Event;
+    "pagehide": PageTransitionEvent;
+    "pageshow": PageTransitionEvent;
+    "popstate": PopStateEvent;
+    "resize": UIEvent;
+    "scroll": UIEvent;
+    "storage": StorageEvent;
+    "unload": Event;
+}
+
+interface HTMLBodyElement extends HTMLElement {
+    aLink: any;
+    background: string;
+    bgColor: any;
+    bgProperties: string;
+    link: any;
+    noWrap: boolean;
+    onafterprint: (this: HTMLBodyElement, ev: Event) => any;
+    onbeforeprint: (this: HTMLBodyElement, ev: Event) => any;
+    onbeforeunload: (this: HTMLBodyElement, ev: BeforeUnloadEvent) => any;
+    onblur: (this: HTMLBodyElement, ev: FocusEvent) => any;
+    onerror: (this: HTMLBodyElement, ev: ErrorEvent) => any;
+    onfocus: (this: HTMLBodyElement, ev: FocusEvent) => any;
+    onhashchange: (this: HTMLBodyElement, ev: HashChangeEvent) => any;
+    onload: (this: HTMLBodyElement, ev: Event) => any;
+    onmessage: (this: HTMLBodyElement, ev: MessageEvent) => any;
+    onoffline: (this: HTMLBodyElement, ev: Event) => any;
+    ononline: (this: HTMLBodyElement, ev: Event) => any;
+    onorientationchange: (this: HTMLBodyElement, ev: Event) => any;
+    onpagehide: (this: HTMLBodyElement, ev: PageTransitionEvent) => any;
+    onpageshow: (this: HTMLBodyElement, ev: PageTransitionEvent) => any;
+    onpopstate: (this: HTMLBodyElement, ev: PopStateEvent) => any;
+    onresize: (this: HTMLBodyElement, ev: UIEvent) => any;
+    onscroll: (this: HTMLBodyElement, ev: UIEvent) => any;
+    onstorage: (this: HTMLBodyElement, ev: StorageEvent) => any;
+    onunload: (this: HTMLBodyElement, ev: Event) => any;
+    text: any;
+    vLink: any;
+    addEventListener<K extends keyof HTMLBodyElementEventMap>(type: K, listener: (this: HTMLBodyElement, ev: HTMLBodyElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLBodyElement: {
+    prototype: HTMLBodyElement;
+    new(): HTMLBodyElement;
+};
+
+interface HTMLBRElement extends HTMLElement {
+    /**
+     * Sets or retrieves the side on which floating objects are not to be positioned when any IHTMLBlockElement is inserted into the document.
+     */
+    clear: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLBRElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLBRElement: {
+    prototype: HTMLBRElement;
+    new(): HTMLBRElement;
+};
+
+interface HTMLButtonElement extends HTMLElement {
+    /**
+     * Provides a way to direct a user to a specific field when a document loads. This can provide both direction and convenience for a user, reducing the need to click or tab to a field when a page opens. This attribute is true when present on an element, and false when missing.
+     */
+    autofocus: boolean;
+    disabled: boolean;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Overrides the action attribute (where the data on a form is sent) on the parent form element.
+     */
+    formAction: string;
+    /**
+     * Used to override the encoding (formEnctype attribute) specified on the form element.
+     */
+    formEnctype: string;
+    /**
+     * Overrides the submit method attribute previously specified on a form element.
+     */
+    formMethod: string;
+    /**
+     * Overrides any validation or required attributes on a form or form elements to allow it to be submitted without validation. This can be used to create a "save draft"-type submit option.
+     */
+    formNoValidate: string;
+    /**
+     * Overrides the target attribute on a form element.
+     */
+    formTarget: string;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    status: any;
+    /**
+     * Gets the classification and default behavior of the button.
+     */
+    type: string;
+    /**
+     * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
+     */
+    readonly validationMessage: string;
+    /**
+     * Returns a  ValidityState object that represents the validity states of an element.
+     */
+    readonly validity: ValidityState;
+    /**
+     * Sets or retrieves the default or selected value of the control.
+     */
+    value: string;
+    /**
+     * Returns whether an element will successfully validate based on forms validation rules and constraints.
+     */
+    readonly willValidate: boolean;
+    /**
+     * Returns whether a form will validate when it is submitted, without having to submit it.
+     */
+    checkValidity(): boolean;
+    /**
+     * Sets a custom error message that is displayed when a form is submitted.
+     * @param error Sets a custom error message that is displayed when a form is submitted.
+     */
+    setCustomValidity(error: string): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLButtonElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLButtonElement: {
+    prototype: HTMLButtonElement;
+    new(): HTMLButtonElement;
+};
+
+interface HTMLCanvasElement extends HTMLElement {
+    /**
+     * Gets or sets the height of a canvas element on a document.
+     */
+    height: number;
+    /**
+     * Gets or sets the width of a canvas element on a document.
+     */
+    width: number;
+    /**
+     * Returns an object that provides methods and properties for drawing and manipulating images and graphics on a canvas element in a document. A context object includes information about colors, line widths, fonts, and other graphic parameters that can be drawn on a canvas.
+     * @param contextId The identifier (ID) of the type of canvas to create. Internet Explorer 9 and Internet Explorer 10 support only a 2-D context using canvas.getContext("2d"); IE11 Preview also supports 3-D or WebGL context using canvas.getContext("experimental-webgl");
+     */
+    getContext(contextId: "2d", contextAttributes?: Canvas2DContextAttributes): CanvasRenderingContext2D | null;
+    getContext(contextId: "webgl" | "experimental-webgl", contextAttributes?: WebGLContextAttributes): WebGLRenderingContext | null;
+    getContext(contextId: string, contextAttributes?: {}): CanvasRenderingContext2D | WebGLRenderingContext | null;
+    /**
+     * Returns a blob object encoded as a Portable Network Graphics (PNG) format from a canvas image or drawing.
+     */
+    msToBlob(): Blob;
+    /**
+     * Returns the content of the current canvas as an image that you can use as a source for another canvas or an HTML element.
+     * @param type The standard MIME type for the image format to return. If you do not specify this parameter, the default value is a PNG format image.
+     */
+    toDataURL(type?: string, ...args: any[]): string;
+    toBlob(callback: (result: Blob | null) => void, type?: string, ...arguments: any[]): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLCanvasElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLCanvasElement: {
+    prototype: HTMLCanvasElement;
+    new(): HTMLCanvasElement;
+};
+
+interface HTMLCollectionBase {
+    /**
+     * Sets or retrieves the number of objects in a collection.
+     */
+    readonly length: number;
+    /**
+     * Retrieves an object from various collections.
+     */
+    item(index: number): Element;
+    [index: number]: Element;
+}
+
+interface HTMLCollection extends HTMLCollectionBase {
+    /**
+     * Retrieves a select object or an object from an options collection.
+     */
+    namedItem(name: string): Element | null;
+}
+
+declare var HTMLCollection: {
+    prototype: HTMLCollection;
+    new(): HTMLCollection;
+};
+
+interface HTMLDataElement extends HTMLElement {
+    value: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLDataElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLDataElement: {
+    prototype: HTMLDataElement;
+    new(): HTMLDataElement;
+};
+
+interface HTMLDataListElement extends HTMLElement {
+    options: HTMLCollectionOf<HTMLOptionElement>;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLDataListElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLDataListElement: {
+    prototype: HTMLDataListElement;
+    new(): HTMLDataListElement;
+};
+
+interface HTMLDirectoryElement extends HTMLElement {
+    compact: boolean;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLDirectoryElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLDirectoryElement: {
+    prototype: HTMLDirectoryElement;
+    new(): HTMLDirectoryElement;
+};
+
+interface HTMLDivElement extends HTMLElement {
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    /**
+     * Sets or retrieves whether the browser automatically performs wordwrap.
+     */
+    noWrap: boolean;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLDivElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLDivElement: {
+    prototype: HTMLDivElement;
+    new(): HTMLDivElement;
+};
+
+interface HTMLDListElement extends HTMLElement {
+    compact: boolean;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLDListElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLDListElement: {
+    prototype: HTMLDListElement;
+    new(): HTMLDListElement;
+};
+
+interface HTMLDocument extends Document {
+    addEventListener<K extends keyof DocumentEventMap>(type: K, listener: (this: HTMLDocument, ev: DocumentEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLDocument: {
+    prototype: HTMLDocument;
+    new(): HTMLDocument;
+};
+
+interface HTMLElementEventMap extends ElementEventMap {
+    "abort": UIEvent;
+    "activate": UIEvent;
+    "beforeactivate": UIEvent;
+    "beforecopy": ClipboardEvent;
+    "beforecut": ClipboardEvent;
+    "beforedeactivate": UIEvent;
+    "beforepaste": ClipboardEvent;
+    "blur": FocusEvent;
+    "canplay": Event;
+    "canplaythrough": Event;
+    "change": Event;
+    "click": MouseEvent;
+    "contextmenu": PointerEvent;
+    "copy": ClipboardEvent;
+    "cuechange": Event;
+    "cut": ClipboardEvent;
+    "dblclick": MouseEvent;
+    "deactivate": UIEvent;
+    "drag": DragEvent;
+    "dragend": DragEvent;
+    "dragenter": DragEvent;
+    "dragleave": DragEvent;
+    "dragover": DragEvent;
+    "dragstart": DragEvent;
+    "drop": DragEvent;
+    "durationchange": Event;
+    "emptied": Event;
+    "ended": MediaStreamErrorEvent;
+    "error": ErrorEvent;
+    "focus": FocusEvent;
+    "input": Event;
+    "invalid": Event;
+    "keydown": KeyboardEvent;
+    "keypress": KeyboardEvent;
+    "keyup": KeyboardEvent;
+    "load": Event;
+    "loadeddata": Event;
+    "loadedmetadata": Event;
+    "loadstart": Event;
+    "mousedown": MouseEvent;
+    "mouseenter": MouseEvent;
+    "mouseleave": MouseEvent;
+    "mousemove": MouseEvent;
+    "mouseout": MouseEvent;
+    "mouseover": MouseEvent;
+    "mouseup": MouseEvent;
+    "mousewheel": WheelEvent;
+    "MSContentZoom": UIEvent;
+    "MSManipulationStateChanged": MSManipulationEvent;
+    "paste": ClipboardEvent;
+    "pause": Event;
+    "play": Event;
+    "playing": Event;
+    "progress": ProgressEvent;
+    "ratechange": Event;
+    "reset": Event;
+    "scroll": UIEvent;
+    "seeked": Event;
+    "seeking": Event;
+    "select": UIEvent;
+    "selectstart": Event;
+    "stalled": Event;
+    "submit": Event;
+    "suspend": Event;
+    "timeupdate": Event;
+    "volumechange": Event;
+    "waiting": Event;
+}
+
+interface HTMLElement extends Element {
+    accessKey: string;
+    readonly children: HTMLCollection;
+    contentEditable: string;
+    readonly dataset: DOMStringMap;
+    dir: string;
+    draggable: boolean;
+    hidden: boolean;
+    hideFocus: boolean;
+    innerText: string;
+    readonly isContentEditable: boolean;
+    lang: string;
+    readonly offsetHeight: number;
+    readonly offsetLeft: number;
+    readonly offsetParent: Element;
+    readonly offsetTop: number;
+    readonly offsetWidth: number;
+    onabort: (this: HTMLElement, ev: UIEvent) => any;
+    onactivate: (this: HTMLElement, ev: UIEvent) => any;
+    onbeforeactivate: (this: HTMLElement, ev: UIEvent) => any;
+    onbeforecopy: (this: HTMLElement, ev: ClipboardEvent) => any;
+    onbeforecut: (this: HTMLElement, ev: ClipboardEvent) => any;
+    onbeforedeactivate: (this: HTMLElement, ev: UIEvent) => any;
+    onbeforepaste: (this: HTMLElement, ev: ClipboardEvent) => any;
+    onblur: (this: HTMLElement, ev: FocusEvent) => any;
+    oncanplay: (this: HTMLElement, ev: Event) => any;
+    oncanplaythrough: (this: HTMLElement, ev: Event) => any;
+    onchange: (this: HTMLElement, ev: Event) => any;
+    onclick: (this: HTMLElement, ev: MouseEvent) => any;
+    oncontextmenu: (this: HTMLElement, ev: PointerEvent) => any;
+    oncopy: (this: HTMLElement, ev: ClipboardEvent) => any;
+    oncuechange: (this: HTMLElement, ev: Event) => any;
+    oncut: (this: HTMLElement, ev: ClipboardEvent) => any;
+    ondblclick: (this: HTMLElement, ev: MouseEvent) => any;
+    ondeactivate: (this: HTMLElement, ev: UIEvent) => any;
+    ondrag: (this: HTMLElement, ev: DragEvent) => any;
+    ondragend: (this: HTMLElement, ev: DragEvent) => any;
+    ondragenter: (this: HTMLElement, ev: DragEvent) => any;
+    ondragleave: (this: HTMLElement, ev: DragEvent) => any;
+    ondragover: (this: HTMLElement, ev: DragEvent) => any;
+    ondragstart: (this: HTMLElement, ev: DragEvent) => any;
+    ondrop: (this: HTMLElement, ev: DragEvent) => any;
+    ondurationchange: (this: HTMLElement, ev: Event) => any;
+    onemptied: (this: HTMLElement, ev: Event) => any;
+    onended: (this: HTMLElement, ev: MediaStreamErrorEvent) => any;
+    onerror: (this: HTMLElement, ev: ErrorEvent) => any;
+    onfocus: (this: HTMLElement, ev: FocusEvent) => any;
+    oninput: (this: HTMLElement, ev: Event) => any;
+    oninvalid: (this: HTMLElement, ev: Event) => any;
+    onkeydown: (this: HTMLElement, ev: KeyboardEvent) => any;
+    onkeypress: (this: HTMLElement, ev: KeyboardEvent) => any;
+    onkeyup: (this: HTMLElement, ev: KeyboardEvent) => any;
+    onload: (this: HTMLElement, ev: Event) => any;
+    onloadeddata: (this: HTMLElement, ev: Event) => any;
+    onloadedmetadata: (this: HTMLElement, ev: Event) => any;
+    onloadstart: (this: HTMLElement, ev: Event) => any;
+    onmousedown: (this: HTMLElement, ev: MouseEvent) => any;
+    onmouseenter: (this: HTMLElement, ev: MouseEvent) => any;
+    onmouseleave: (this: HTMLElement, ev: MouseEvent) => any;
+    onmousemove: (this: HTMLElement, ev: MouseEvent) => any;
+    onmouseout: (this: HTMLElement, ev: MouseEvent) => any;
+    onmouseover: (this: HTMLElement, ev: MouseEvent) => any;
+    onmouseup: (this: HTMLElement, ev: MouseEvent) => any;
+    onmousewheel: (this: HTMLElement, ev: WheelEvent) => any;
+    onmscontentzoom: (this: HTMLElement, ev: UIEvent) => any;
+    onmsmanipulationstatechanged: (this: HTMLElement, ev: MSManipulationEvent) => any;
+    onpaste: (this: HTMLElement, ev: ClipboardEvent) => any;
+    onpause: (this: HTMLElement, ev: Event) => any;
+    onplay: (this: HTMLElement, ev: Event) => any;
+    onplaying: (this: HTMLElement, ev: Event) => any;
+    onprogress: (this: HTMLElement, ev: ProgressEvent) => any;
+    onratechange: (this: HTMLElement, ev: Event) => any;
+    onreset: (this: HTMLElement, ev: Event) => any;
+    onscroll: (this: HTMLElement, ev: UIEvent) => any;
+    onseeked: (this: HTMLElement, ev: Event) => any;
+    onseeking: (this: HTMLElement, ev: Event) => any;
+    onselect: (this: HTMLElement, ev: UIEvent) => any;
+    onselectstart: (this: HTMLElement, ev: Event) => any;
+    onstalled: (this: HTMLElement, ev: Event) => any;
+    onsubmit: (this: HTMLElement, ev: Event) => any;
+    onsuspend: (this: HTMLElement, ev: Event) => any;
+    ontimeupdate: (this: HTMLElement, ev: Event) => any;
+    onvolumechange: (this: HTMLElement, ev: Event) => any;
+    onwaiting: (this: HTMLElement, ev: Event) => any;
+    outerText: string;
+    spellcheck: boolean;
+    readonly style: CSSStyleDeclaration;
+    tabIndex: number;
+    title: string;
+    blur(): void;
+    click(): void;
+    dragDrop(): boolean;
+    focus(): void;
+    msGetInputContext(): MSInputMethodContext;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLElement: {
+    prototype: HTMLElement;
+    new(): HTMLElement;
+};
+
+interface HTMLEmbedElement extends HTMLElement, GetSVGDocument {
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: string;
+    hidden: any;
+    /**
+     * Gets or sets whether the DLNA PlayTo device is available.
+     */
+    msPlayToDisabled: boolean;
+    /**
+     * Gets or sets the path to the preferred media source. This enables the Play To target device to stream the media content, which can be DRM protected, from a different location, such as a cloud media server.
+     */
+    msPlayToPreferredSourceUri: string;
+    /**
+     * Gets or sets the primary DLNA PlayTo device.
+     */
+    msPlayToPrimary: boolean;
+    /**
+     * Gets the source associated with the media element for use by the PlayToManager.
+     */
+    readonly msPlayToSource: any;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    /**
+     * Retrieves the palette used for the embedded document.
+     */
+    readonly palette: string;
+    /**
+     * Retrieves the URL of the plug-in used to view an embedded document.
+     */
+    readonly pluginspage: string;
+    readonly readyState: string;
+    /**
+     * Sets or retrieves a URL to be loaded by the object.
+     */
+    src: string;
+    /**
+     * Sets or retrieves the height and width units of the embed object.
+     */
+    units: string;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLEmbedElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLEmbedElement: {
+    prototype: HTMLEmbedElement;
+    new(): HTMLEmbedElement;
+};
+
+interface HTMLFieldSetElement extends HTMLElement {
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    disabled: boolean;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    name: string;
+    /**
+     * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
+     */
+    readonly validationMessage: string;
+    /**
+     * Returns a  ValidityState object that represents the validity states of an element.
+     */
+    readonly validity: ValidityState;
+    /**
+     * Returns whether an element will successfully validate based on forms validation rules and constraints.
+     */
+    readonly willValidate: boolean;
+    /**
+     * Returns whether a form will validate when it is submitted, without having to submit it.
+     */
+    checkValidity(): boolean;
+    /**
+     * Sets a custom error message that is displayed when a form is submitted.
+     * @param error Sets a custom error message that is displayed when a form is submitted.
+     */
+    setCustomValidity(error: string): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLFieldSetElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLFieldSetElement: {
+    prototype: HTMLFieldSetElement;
+    new(): HTMLFieldSetElement;
+};
+
+interface HTMLFontElement extends HTMLElement, DOML2DeprecatedColorProperty, DOML2DeprecatedSizeProperty {
+    /**
+     * Sets or retrieves the current typeface family.
+     */
+    face: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLFontElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLFontElement: {
+    prototype: HTMLFontElement;
+    new(): HTMLFontElement;
+};
+
+interface HTMLFormControlsCollection extends HTMLCollectionBase {
+    namedItem(name: string): HTMLCollection | Element | null;
+}
+
+declare var HTMLFormControlsCollection: {
+    prototype: HTMLFormControlsCollection;
+    new(): HTMLFormControlsCollection;
+};
+
+interface HTMLFormElement extends HTMLElement {
+    /**
+     * Sets or retrieves a list of character encodings for input data that must be accepted by the server processing the form.
+     */
+    acceptCharset: string;
+    /**
+     * Sets or retrieves the URL to which the form content is sent for processing.
+     */
+    action: string;
+    /**
+     * Specifies whether autocomplete is applied to an editable text field.
+     */
+    autocomplete: string;
+    /**
+     * Retrieves a collection, in source order, of all controls in a given form.
+     */
+    readonly elements: HTMLFormControlsCollection;
+    /**
+     * Sets or retrieves the MIME encoding for the form.
+     */
+    encoding: string;
+    /**
+     * Sets or retrieves the encoding type for the form.
+     */
+    enctype: string;
+    /**
+     * Sets or retrieves the number of objects in a collection.
+     */
+    readonly length: number;
+    /**
+     * Sets or retrieves how to send the form data to the server.
+     */
+    method: string;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    /**
+     * Designates a form that is not validated when submitted.
+     */
+    noValidate: boolean;
+    /**
+     * Sets or retrieves the window or frame at which to target content.
+     */
+    target: string;
+    /**
+     * Returns whether a form will validate when it is submitted, without having to submit it.
+     */
+    checkValidity(): boolean;
+    /**
+     * Retrieves a form object or an object from an elements collection.
+     * @param name Variant of type Number or String that specifies the object or collection to retrieve. If this parameter is a Number, it is the zero-based index of the object. If this parameter is a string, all objects with matching name or id properties are retrieved, and a collection is returned if more than one match is made.
+     * @param index Variant of type Number that specifies the zero-based index of the object to retrieve when a collection is returned.
+     */
+    item(name?: any, index?: any): any;
+    /**
+     * Retrieves a form object or an object from an elements collection.
+     */
+    namedItem(name: string): any;
+    /**
+     * Fires when the user resets a form.
+     */
+    reset(): void;
+    /**
+     * Fires when a FORM is about to be submitted.
+     */
+    submit(): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLFormElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+    [name: string]: any;
+}
+
+declare var HTMLFormElement: {
+    prototype: HTMLFormElement;
+    new(): HTMLFormElement;
+};
+
+interface HTMLFrameElementEventMap extends HTMLElementEventMap {
+    "load": Event;
+}
+
+interface HTMLFrameElement extends HTMLElement, GetSVGDocument {
+    /**
+     * Specifies the properties of a border drawn around an object.
+     */
+    border: string;
+    /**
+     * Sets or retrieves the border color of the object.
+     */
+    borderColor: any;
+    /**
+     * Retrieves the document object of the page or frame.
+     */
+    readonly contentDocument: Document;
+    /**
+     * Retrieves the object of the specified.
+     */
+    readonly contentWindow: Window;
+    /**
+     * Sets or retrieves whether to display a border for the frame.
+     */
+    frameBorder: string;
+    /**
+     * Sets or retrieves the amount of additional space between the frames.
+     */
+    frameSpacing: any;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: string | number;
+    /**
+     * Sets or retrieves a URI to a long description of the object.
+     */
+    longDesc: string;
+    /**
+     * Sets or retrieves the top and bottom margin heights before displaying the text in a frame.
+     */
+    marginHeight: string;
+    /**
+     * Sets or retrieves the left and right margin widths before displaying the text in a frame.
+     */
+    marginWidth: string;
+    /**
+     * Sets or retrieves the frame name.
+     */
+    name: string;
+    /**
+     * Sets or retrieves whether the user can resize the frame.
+     */
+    noResize: boolean;
+    /**
+     * Raised when the object has been completely received from the server.
+     */
+    onload: (this: HTMLFrameElement, ev: Event) => any;
+    /**
+     * Sets or retrieves whether the frame can be scrolled.
+     */
+    scrolling: string;
+    /**
+     * Sets or retrieves a URL to be loaded by the object.
+     */
+    src: string;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: string | number;
+    addEventListener<K extends keyof HTMLFrameElementEventMap>(type: K, listener: (this: HTMLFrameElement, ev: HTMLFrameElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLFrameElement: {
+    prototype: HTMLFrameElement;
+    new(): HTMLFrameElement;
+};
+
+interface HTMLFrameSetElementEventMap extends HTMLElementEventMap {
+    "afterprint": Event;
+    "beforeprint": Event;
+    "beforeunload": BeforeUnloadEvent;
+    "blur": FocusEvent;
+    "error": ErrorEvent;
+    "focus": FocusEvent;
+    "hashchange": HashChangeEvent;
+    "load": Event;
+    "message": MessageEvent;
+    "offline": Event;
+    "online": Event;
+    "orientationchange": Event;
+    "pagehide": PageTransitionEvent;
+    "pageshow": PageTransitionEvent;
+    "popstate": PopStateEvent;
+    "resize": UIEvent;
+    "scroll": UIEvent;
+    "storage": StorageEvent;
+    "unload": Event;
+}
+
+interface HTMLFrameSetElement extends HTMLElement {
+    border: string;
+    /**
+     * Sets or retrieves the border color of the object.
+     */
+    borderColor: any;
+    /**
+     * Sets or retrieves the frame widths of the object.
+     */
+    cols: string;
+    /**
+     * Sets or retrieves whether to display a border for the frame.
+     */
+    frameBorder: string;
+    /**
+     * Sets or retrieves the amount of additional space between the frames.
+     */
+    frameSpacing: any;
+    name: string;
+    onafterprint: (this: HTMLFrameSetElement, ev: Event) => any;
+    onbeforeprint: (this: HTMLFrameSetElement, ev: Event) => any;
+    onbeforeunload: (this: HTMLFrameSetElement, ev: BeforeUnloadEvent) => any;
+    /**
+     * Fires when the object loses the input focus.
+     */
+    onblur: (this: HTMLFrameSetElement, ev: FocusEvent) => any;
+    onerror: (this: HTMLFrameSetElement, ev: ErrorEvent) => any;
+    /**
+     * Fires when the object receives focus.
+     */
+    onfocus: (this: HTMLFrameSetElement, ev: FocusEvent) => any;
+    onhashchange: (this: HTMLFrameSetElement, ev: HashChangeEvent) => any;
+    onload: (this: HTMLFrameSetElement, ev: Event) => any;
+    onmessage: (this: HTMLFrameSetElement, ev: MessageEvent) => any;
+    onoffline: (this: HTMLFrameSetElement, ev: Event) => any;
+    ononline: (this: HTMLFrameSetElement, ev: Event) => any;
+    onorientationchange: (this: HTMLFrameSetElement, ev: Event) => any;
+    onpagehide: (this: HTMLFrameSetElement, ev: PageTransitionEvent) => any;
+    onpageshow: (this: HTMLFrameSetElement, ev: PageTransitionEvent) => any;
+    onpopstate: (this: HTMLFrameSetElement, ev: PopStateEvent) => any;
+    onresize: (this: HTMLFrameSetElement, ev: UIEvent) => any;
+    onscroll: (this: HTMLFrameSetElement, ev: UIEvent) => any;
+    onstorage: (this: HTMLFrameSetElement, ev: StorageEvent) => any;
+    onunload: (this: HTMLFrameSetElement, ev: Event) => any;
+    /**
+     * Sets or retrieves the frame heights of the object.
+     */
+    rows: string;
+    addEventListener<K extends keyof HTMLFrameSetElementEventMap>(type: K, listener: (this: HTMLFrameSetElement, ev: HTMLFrameSetElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLFrameSetElement: {
+    prototype: HTMLFrameSetElement;
+    new(): HTMLFrameSetElement;
+};
+
+interface HTMLHeadElement extends HTMLElement {
+    profile: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLHeadElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLHeadElement: {
+    prototype: HTMLHeadElement;
+    new(): HTMLHeadElement;
+};
+
+interface HTMLHeadingElement extends HTMLElement {
+    /**
+     * Sets or retrieves a value that indicates the table alignment.
+     */
+    align: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLHeadingElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLHeadingElement: {
+    prototype: HTMLHeadingElement;
+    new(): HTMLHeadingElement;
+};
+
+interface HTMLHRElement extends HTMLElement, DOML2DeprecatedColorProperty, DOML2DeprecatedSizeProperty {
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    /**
+     * Sets or retrieves whether the horizontal rule is drawn with 3-D shading.
+     */
+    noShade: boolean;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: number;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLHRElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLHRElement: {
+    prototype: HTMLHRElement;
+    new(): HTMLHRElement;
+};
+
+interface HTMLHtmlElement extends HTMLElement {
+    /**
+     * Sets or retrieves the DTD version that governs the current document.
+     */
+    version: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLHtmlElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLHtmlElement: {
+    prototype: HTMLHtmlElement;
+    new(): HTMLHtmlElement;
+};
+
+interface HTMLIFrameElementEventMap extends HTMLElementEventMap {
+    "load": Event;
+}
+
+interface HTMLIFrameElement extends HTMLElement, GetSVGDocument {
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    allowFullscreen: boolean;
+    allowPaymentRequest: boolean;
+    /**
+     * Specifies the properties of a border drawn around an object.
+     */
+    border: string;
+    /**
+     * Retrieves the document object of the page or frame.
+     */
+    readonly contentDocument: Document;
+    /**
+     * Retrieves the object of the specified.
+     */
+    readonly contentWindow: Window;
+    /**
+     * Sets or retrieves whether to display a border for the frame.
+     */
+    frameBorder: string;
+    /**
+     * Sets or retrieves the amount of additional space between the frames.
+     */
+    frameSpacing: any;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: string;
+    /**
+     * Sets or retrieves the horizontal margin for the object.
+     */
+    hspace: number;
+    /**
+     * Sets or retrieves a URI to a long description of the object.
+     */
+    longDesc: string;
+    /**
+     * Sets or retrieves the top and bottom margin heights before displaying the text in a frame.
+     */
+    marginHeight: string;
+    /**
+     * Sets or retrieves the left and right margin widths before displaying the text in a frame.
+     */
+    marginWidth: string;
+    /**
+     * Sets or retrieves the frame name.
+     */
+    name: string;
+    /**
+     * Sets or retrieves whether the user can resize the frame.
+     */
+    noResize: boolean;
+    /**
+     * Raised when the object has been completely received from the server.
+     */
+    onload: (this: HTMLIFrameElement, ev: Event) => any;
+    readonly sandbox: DOMSettableTokenList;
+    /**
+     * Sets or retrieves whether the frame can be scrolled.
+     */
+    scrolling: string;
+    /**
+     * Sets or retrieves a URL to be loaded by the object.
+     */
+    src: string;
+    /**
+     * Sets or retrieves the vertical margin for the object.
+     */
+    vspace: number;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: string;
+    addEventListener<K extends keyof HTMLIFrameElementEventMap>(type: K, listener: (this: HTMLIFrameElement, ev: HTMLIFrameElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLIFrameElement: {
+    prototype: HTMLIFrameElement;
+    new(): HTMLIFrameElement;
+};
+
+interface HTMLImageElement extends HTMLElement {
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    /**
+     * Sets or retrieves a text alternative to the graphic.
+     */
+    alt: string;
+    /**
+     * Specifies the properties of a border drawn around an object.
+     */
+    border: string;
+    /**
+     * Retrieves whether the object is fully loaded.
+     */
+    readonly complete: boolean;
+    crossOrigin: string | null;
+    readonly currentSrc: string;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: number;
+    /**
+     * Sets or retrieves the width of the border to draw around the object.
+     */
+    hspace: number;
+    /**
+     * Sets or retrieves whether the image is a server-side image map.
+     */
+    isMap: boolean;
+    /**
+     * Sets or retrieves a Uniform Resource Identifier (URI) to a long description of the object.
+     */
+    longDesc: string;
+    lowsrc: string;
+    /**
+     * Gets or sets whether the DLNA PlayTo device is available.
+     */
+    msPlayToDisabled: boolean;
+    msPlayToPreferredSourceUri: string;
+    /**
+     * Gets or sets the primary DLNA PlayTo device.
+     */
+    msPlayToPrimary: boolean;
+    /**
+     * Gets the source associated with the media element for use by the PlayToManager.
+     */
+    readonly msPlayToSource: any;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    /**
+     * The original height of the image resource before sizing.
+     */
+    readonly naturalHeight: number;
+    /**
+     * The original width of the image resource before sizing.
+     */
+    readonly naturalWidth: number;
+    sizes: string;
+    /**
+     * The address or URL of the a media resource that is to be considered.
+     */
+    src: string;
+    srcset: string;
+    /**
+     * Sets or retrieves the URL, often with a bookmark extension (#name), to use as a client-side image map.
+     */
+    useMap: string;
+    /**
+     * Sets or retrieves the vertical margin for the object.
+     */
+    vspace: number;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: number;
+    readonly x: number;
+    readonly y: number;
+    msGetAsCastingSource(): any;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLImageElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLImageElement: {
+    prototype: HTMLImageElement;
+    new(): HTMLImageElement;
+};
+
+interface HTMLInputElement extends HTMLElement {
+    /**
+     * Sets or retrieves a comma-separated list of content types.
+     */
+    accept: string;
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    /**
+     * Sets or retrieves a text alternative to the graphic.
+     */
+    alt: string;
+    /**
+     * Specifies whether autocomplete is applied to an editable text field.
+     */
+    autocomplete: string;
+    /**
+     * Provides a way to direct a user to a specific field when a document loads. This can provide both direction and convenience for a user, reducing the need to click or tab to a field when a page opens. This attribute is true when present on an element, and false when missing.
+     */
+    autofocus: boolean;
+    /**
+     * Sets or retrieves the width of the border to draw around the object.
+     */
+    border: string;
+    /**
+     * Sets or retrieves the state of the check box or radio button.
+     */
+    checked: boolean;
+    /**
+     * Retrieves whether the object is fully loaded.
+     */
+    readonly complete: boolean;
+    /**
+     * Sets or retrieves the state of the check box or radio button.
+     */
+    defaultChecked: boolean;
+    /**
+     * Sets or retrieves the initial contents of the object.
+     */
+    defaultValue: string;
+    disabled: boolean;
+    /**
+     * Returns a FileList object on a file type input object.
+     */
+    readonly files: FileList | null;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Overrides the action attribute (where the data on a form is sent) on the parent form element.
+     */
+    formAction: string;
+    /**
+     * Used to override the encoding (formEnctype attribute) specified on the form element.
+     */
+    formEnctype: string;
+    /**
+     * Overrides the submit method attribute previously specified on a form element.
+     */
+    formMethod: string;
+    /**
+     * Overrides any validation or required attributes on a form or form elements to allow it to be submitted without validation. This can be used to create a "save draft"-type submit option.
+     */
+    formNoValidate: string;
+    /**
+     * Overrides the target attribute on a form element.
+     */
+    formTarget: string;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: string;
+    /**
+     * Sets or retrieves the width of the border to draw around the object.
+     */
+    hspace: number;
+    indeterminate: boolean;
+    /**
+     * Specifies the ID of a pre-defined datalist of options for an input element.
+     */
+    readonly list: HTMLElement;
+    /**
+     * Defines the maximum acceptable value for an input element with type="number".When used with the min and step attributes, lets you control the range and increment (such as only even numbers) that the user can enter into an input field.
+     */
+    max: string;
+    /**
+     * Sets or retrieves the maximum number of characters that the user can enter in a text control.
+     */
+    maxLength: number;
+    /**
+     * Defines the minimum acceptable value for an input element with type="number". When used with the max and step attributes, lets you control the range and increment (such as even numbers only) that the user can enter into an input field.
+     */
+    min: string;
+    /**
+     * Sets or retrieves the Boolean value indicating whether multiple items can be selected from a list.
+     */
+    multiple: boolean;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    /**
+     * Gets or sets a string containing a regular expression that the user's input must match.
+     */
+    pattern: string;
+    /**
+     * Gets or sets a text string that is displayed in an input field as a hint or prompt to users as the format or type of information they need to enter.The text appears in an input field until the user puts focus on the field.
+     */
+    placeholder: string;
+    readOnly: boolean;
+    /**
+     * When present, marks an element that can't be submitted without a value.
+     */
+    required: boolean;
+    selectionDirection: string;
+    /**
+     * Gets or sets the end position or offset of a text selection.
+     */
+    selectionEnd: number;
+    /**
+     * Gets or sets the starting position or offset of a text selection.
+     */
+    selectionStart: number;
+    size: number;
+    /**
+     * The address or URL of the a media resource that is to be considered.
+     */
+    src: string;
+    status: boolean;
+    /**
+     * Defines an increment or jump between values that you want to allow the user to enter. When used with the max and min attributes, lets you control the range and increment (for example, allow only even numbers) that the user can enter into an input field.
+     */
+    step: string;
+    /**
+     * Returns the content type of the object.
+     */
+    type: string;
+    /**
+     * Sets or retrieves the URL, often with a bookmark extension (#name), to use as a client-side image map.
+     */
+    useMap: string;
+    /**
+     * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
+     */
+    readonly validationMessage: string;
+    /**
+     * Returns a  ValidityState object that represents the validity states of an element.
+     */
+    readonly validity: ValidityState;
+    /**
+     * Returns the value of the data at the cursor's current position.
+     */
+    value: string;
+    valueAsDate: Date;
+    /**
+     * Returns the input field value as a number.
+     */
+    valueAsNumber: number;
+    /**
+     * Sets or retrieves the vertical margin for the object.
+     */
+    vspace: number;
+    webkitdirectory: boolean;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: string;
+    /**
+     * Returns whether an element will successfully validate based on forms validation rules and constraints.
+     */
+    readonly willValidate: boolean;
+    minLength: number;
+    /**
+     * Returns whether a form will validate when it is submitted, without having to submit it.
+     */
+    checkValidity(): boolean;
+    /**
+     * Makes the selection equal to the current object.
+     */
+    select(): void;
+    /**
+     * Sets a custom error message that is displayed when a form is submitted.
+     * @param error Sets a custom error message that is displayed when a form is submitted.
+     */
+    setCustomValidity(error: string): void;
+    /**
+     * Sets the start and end positions of a selection in a text field.
+     * @param start The offset into the text field for the start of the selection.
+     * @param end The offset into the text field for the end of the selection.
+     */
+    setSelectionRange(start?: number, end?: number, direction?: string): void;
+    /**
+     * Decrements a range input control's value by the value given by the Step attribute. If the optional parameter is used, it will decrement the input control's step value multiplied by the parameter's value.
+     * @param n Value to decrement the value by.
+     */
+    stepDown(n?: number): void;
+    /**
+     * Increments a range input control's value by the value given by the Step attribute. If the optional parameter is used, will increment the input control's value by that value.
+     * @param n Value to increment the value by.
+     */
+    stepUp(n?: number): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLInputElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLInputElement: {
+    prototype: HTMLInputElement;
+    new(): HTMLInputElement;
+};
+
+interface HTMLLabelElement extends HTMLElement {
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Sets or retrieves the object to which the given label object is assigned.
+     */
+    htmlFor: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLLabelElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLLabelElement: {
+    prototype: HTMLLabelElement;
+    new(): HTMLLabelElement;
+};
+
+interface HTMLLegendElement extends HTMLElement {
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    align: string;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLLegendElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLLegendElement: {
+    prototype: HTMLLegendElement;
+    new(): HTMLLegendElement;
+};
+
+interface HTMLLIElement extends HTMLElement {
+    type: string;
+    /**
+     * Sets or retrieves the value of a list item.
+     */
+    value: number;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLLIElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLLIElement: {
+    prototype: HTMLLIElement;
+    new(): HTMLLIElement;
+};
+
+interface HTMLLinkElement extends HTMLElement, LinkStyle {
+    /**
+     * Sets or retrieves the character set used to encode the object.
+     */
+    charset: string;
+    disabled: boolean;
+    /**
+     * Sets or retrieves a destination URL or an anchor point.
+     */
+    href: string;
+    /**
+     * Sets or retrieves the language code of the object.
+     */
+    hreflang: string;
+    /**
+     * Sets or retrieves the media type.
+     */
+    media: string;
+    /**
+     * Sets or retrieves the relationship between the object and the destination of the link.
+     */
+    rel: string;
+    /**
+     * Sets or retrieves the relationship between the object and the destination of the link.
+     */
+    rev: string;
+    /**
+     * Sets or retrieves the window or frame at which to target content.
+     */
+    target: string;
+    /**
+     * Sets or retrieves the MIME type of the object.
+     */
+    type: string;
+    import?: Document;
+    integrity: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLLinkElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLLinkElement: {
+    prototype: HTMLLinkElement;
+    new(): HTMLLinkElement;
+};
+
+interface HTMLMapElement extends HTMLElement {
+    /**
+     * Retrieves a collection of the area objects defined for the given map object.
+     */
+    readonly areas: HTMLAreasCollection;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLMapElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLMapElement: {
+    prototype: HTMLMapElement;
+    new(): HTMLMapElement;
+};
+
+interface HTMLMarqueeElementEventMap extends HTMLElementEventMap {
+    "bounce": Event;
+    "finish": Event;
+    "start": Event;
+}
+
+interface HTMLMarqueeElement extends HTMLElement {
+    behavior: string;
+    bgColor: any;
+    direction: string;
+    height: string;
+    hspace: number;
+    loop: number;
+    onbounce: (this: HTMLMarqueeElement, ev: Event) => any;
+    onfinish: (this: HTMLMarqueeElement, ev: Event) => any;
+    onstart: (this: HTMLMarqueeElement, ev: Event) => any;
+    scrollAmount: number;
+    scrollDelay: number;
+    trueSpeed: boolean;
+    vspace: number;
+    width: string;
+    start(): void;
+    stop(): void;
+    addEventListener<K extends keyof HTMLMarqueeElementEventMap>(type: K, listener: (this: HTMLMarqueeElement, ev: HTMLMarqueeElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLMarqueeElement: {
+    prototype: HTMLMarqueeElement;
+    new(): HTMLMarqueeElement;
+};
+
+interface HTMLMediaElementEventMap extends HTMLElementEventMap {
+    "encrypted": MediaEncryptedEvent;
+    "msneedkey": MSMediaKeyNeededEvent;
+}
+
+interface HTMLMediaElement extends HTMLElement {
+    /**
+     * Returns an AudioTrackList object with the audio tracks for a given video element.
+     */
+    readonly audioTracks: AudioTrackList;
+    /**
+     * Gets or sets a value that indicates whether to start playing the media automatically.
+     */
+    autoplay: boolean;
+    /**
+     * Gets a collection of buffered time ranges.
+     */
+    readonly buffered: TimeRanges;
+    /**
+     * Gets or sets a flag that indicates whether the client provides a set of controls for the media (in case the developer does not include controls for the player).
+     */
+    controls: boolean;
+    crossOrigin: string | null;
+    /**
+     * Gets the address or URL of the current media resource that is selected by IHTMLMediaElement.
+     */
+    readonly currentSrc: string;
+    /**
+     * Gets or sets the current playback position, in seconds.
+     */
+    currentTime: number;
+    defaultMuted: boolean;
+    /**
+     * Gets or sets the default playback rate when the user is not using fast forward or reverse for a video or audio resource.
+     */
+    defaultPlaybackRate: number;
+    /**
+     * Returns the duration in seconds of the current media resource. A NaN value is returned if duration is not available, or Infinity if the media resource is streaming.
+     */
+    readonly duration: number;
+    /**
+     * Gets information about whether the playback has ended or not.
+     */
+    readonly ended: boolean;
+    /**
+     * Returns an object representing the current error state of the audio or video element.
+     */
+    readonly error: MediaError;
+    /**
+     * Gets or sets a flag to specify whether playback should restart after it completes.
+     */
+    loop: boolean;
+    readonly mediaKeys: MediaKeys | null;
+    /**
+     * Specifies the purpose of the audio or video media, such as background audio or alerts.
+     */
+    msAudioCategory: string;
+    /**
+     * Specifies the output device id that the audio will be sent to.
+     */
+    msAudioDeviceType: string;
+    readonly msGraphicsTrustStatus: MSGraphicsTrust;
+    /**
+     * Gets the MSMediaKeys object, which is used for decrypting media data, that is associated with this media element.
+     */
+    readonly msKeys: MSMediaKeys;
+    /**
+     * Gets or sets whether the DLNA PlayTo device is available.
+     */
+    msPlayToDisabled: boolean;
+    /**
+     * Gets or sets the path to the preferred media source. This enables the Play To target device to stream the media content, which can be DRM protected, from a different location, such as a cloud media server.
+     */
+    msPlayToPreferredSourceUri: string;
+    /**
+     * Gets or sets the primary DLNA PlayTo device.
+     */
+    msPlayToPrimary: boolean;
+    /**
+     * Gets the source associated with the media element for use by the PlayToManager.
+     */
+    readonly msPlayToSource: any;
+    /**
+     * Specifies whether or not to enable low-latency playback on the media element.
+     */
+    msRealTime: boolean;
+    /**
+     * Gets or sets a flag that indicates whether the audio (either audio or the audio track on video media) is muted.
+     */
+    muted: boolean;
+    /**
+     * Gets the current network activity for the element.
+     */
+    readonly networkState: number;
+    onencrypted: (this: HTMLMediaElement, ev: MediaEncryptedEvent) => any;
+    onmsneedkey: (this: HTMLMediaElement, ev: MSMediaKeyNeededEvent) => any;
+    /**
+     * Gets a flag that specifies whether playback is paused.
+     */
+    readonly paused: boolean;
+    /**
+     * Gets or sets the current rate of speed for the media resource to play. This speed is expressed as a multiple of the normal speed of the media resource.
+     */
+    playbackRate: number;
+    /**
+     * Gets TimeRanges for the current media resource that has been played.
+     */
+    readonly played: TimeRanges;
+    /**
+     * Gets or sets the current playback position, in seconds.
+     */
+    preload: string;
+    readyState: number;
+    /**
+     * Returns a TimeRanges object that represents the ranges of the current media resource that can be seeked.
+     */
+    readonly seekable: TimeRanges;
+    /**
+     * Gets a flag that indicates whether the the client is currently moving to a new playback position in the media resource.
+     */
+    readonly seeking: boolean;
+    /**
+     * The address or URL of the a media resource that is to be considered.
+     */
+    src: string;
+    srcObject: MediaStream | null;
+    readonly textTracks: TextTrackList;
+    readonly videoTracks: VideoTrackList;
+    /**
+     * Gets or sets the volume level for audio portions of the media element.
+     */
+    volume: number;
+    addTextTrack(kind: string, label?: string, language?: string): TextTrack;
+    /**
+     * Returns a string that specifies whether the client can play a given media resource type.
+     */
+    canPlayType(type: string): string;
+    /**
+     * Resets the audio or video object and loads a new media resource.
+     */
+    load(): void;
+    /**
+     * Clears all effects from the media pipeline.
+     */
+    msClearEffects(): void;
+    msGetAsCastingSource(): any;
+    /**
+     * Inserts the specified audio effect into media pipeline.
+     */
+    msInsertAudioEffect(activatableClassId: string, effectRequired: boolean, config?: any): void;
+    msSetMediaKeys(mediaKeys: MSMediaKeys): void;
+    /**
+     * Specifies the media protection manager for a given media pipeline.
+     */
+    msSetMediaProtectionManager(mediaProtectionManager?: any): void;
+    /**
+     * Pauses the current playback and sets paused to TRUE. This can be used to test whether the media is playing or paused. You can also use the pause or play events to tell whether the media is playing or not.
+     */
+    pause(): void;
+    /**
+     * Loads and starts playback of a media resource.
+     */
+    play(): Promise<void>;
+    setMediaKeys(mediaKeys: MediaKeys | null): Promise<void>;
+    readonly HAVE_CURRENT_DATA: number;
+    readonly HAVE_ENOUGH_DATA: number;
+    readonly HAVE_FUTURE_DATA: number;
+    readonly HAVE_METADATA: number;
+    readonly HAVE_NOTHING: number;
+    readonly NETWORK_EMPTY: number;
+    readonly NETWORK_IDLE: number;
+    readonly NETWORK_LOADING: number;
+    readonly NETWORK_NO_SOURCE: number;
+    addEventListener<K extends keyof HTMLMediaElementEventMap>(type: K, listener: (this: HTMLMediaElement, ev: HTMLMediaElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLMediaElement: {
+    prototype: HTMLMediaElement;
+    new(): HTMLMediaElement;
+    readonly HAVE_CURRENT_DATA: number;
+    readonly HAVE_ENOUGH_DATA: number;
+    readonly HAVE_FUTURE_DATA: number;
+    readonly HAVE_METADATA: number;
+    readonly HAVE_NOTHING: number;
+    readonly NETWORK_EMPTY: number;
+    readonly NETWORK_IDLE: number;
+    readonly NETWORK_LOADING: number;
+    readonly NETWORK_NO_SOURCE: number;
+};
+
+interface HTMLMenuElement extends HTMLElement {
+    compact: boolean;
+    type: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLMenuElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLMenuElement: {
+    prototype: HTMLMenuElement;
+    new(): HTMLMenuElement;
+};
+
+interface HTMLMetaElement extends HTMLElement {
+    /**
+     * Sets or retrieves the character set used to encode the object.
+     */
+    charset: string;
+    /**
+     * Gets or sets meta-information to associate with httpEquiv or name.
+     */
+    content: string;
+    /**
+     * Gets or sets information used to bind the value of a content attribute of a meta element to an HTTP response header.
+     */
+    httpEquiv: string;
+    /**
+     * Sets or retrieves the value specified in the content attribute of the meta object.
+     */
+    name: string;
+    /**
+     * Sets or retrieves a scheme to be used in interpreting the value of a property specified for the object.
+     */
+    scheme: string;
+    /**
+     * Sets or retrieves the URL property that will be loaded after the specified time has elapsed.
+     */
+    url: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLMetaElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLMetaElement: {
+    prototype: HTMLMetaElement;
+    new(): HTMLMetaElement;
+};
+
+interface HTMLMeterElement extends HTMLElement {
+    high: number;
+    low: number;
+    max: number;
+    min: number;
+    optimum: number;
+    value: number;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLMeterElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLMeterElement: {
+    prototype: HTMLMeterElement;
+    new(): HTMLMeterElement;
+};
+
+interface HTMLModElement extends HTMLElement {
+    /**
+     * Sets or retrieves reference information about the object.
+     */
+    cite: string;
+    /**
+     * Sets or retrieves the date and time of a modification to the object.
+     */
+    dateTime: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLModElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLModElement: {
+    prototype: HTMLModElement;
+    new(): HTMLModElement;
+};
+
+interface HTMLObjectElement extends HTMLElement, GetSVGDocument {
+    align: string;
+    /**
+     * Sets or retrieves a text alternative to the graphic.
+     */
+    alt: string;
+    /**
+     * Gets or sets the optional alternative HTML script to execute if the object fails to load.
+     */
+    altHtml: string;
+    /**
+     * Sets or retrieves a character string that can be used to implement your own archive functionality for the object.
+     */
+    archive: string;
+    /**
+     * Retrieves a string of the URL where the object tag can be found. This is often the href of the document that the object is in, or the value set by a base element.
+     */
+    readonly BaseHref: string;
+    border: string;
+    /**
+     * Sets or retrieves the URL of the file containing the compiled Java class.
+     */
+    code: string;
+    /**
+     * Sets or retrieves the URL of the component.
+     */
+    codeBase: string;
+    /**
+     * Sets or retrieves the Internet media type for the code associated with the object.
+     */
+    codeType: string;
+    /**
+     * Retrieves the document object of the page or frame.
+     */
+    readonly contentDocument: Document;
+    /**
+     * Sets or retrieves the URL that references the data of the object.
+     */
+    data: string;
+    declare: boolean;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: string;
+    hspace: number;
+    /**
+     * Gets or sets whether the DLNA PlayTo device is available.
+     */
+    msPlayToDisabled: boolean;
+    /**
+     * Gets or sets the path to the preferred media source. This enables the Play To target device to stream the media content, which can be DRM protected, from a different location, such as a cloud media server.
+     */
+    msPlayToPreferredSourceUri: string;
+    /**
+     * Gets or sets the primary DLNA PlayTo device.
+     */
+    msPlayToPrimary: boolean;
+    /**
+     * Gets the source associated with the media element for use by the PlayToManager.
+     */
+    readonly msPlayToSource: any;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    readonly readyState: number;
+    /**
+     * Sets or retrieves a message to be displayed while an object is loading.
+     */
+    standby: string;
+    /**
+     * Sets or retrieves the MIME type of the object.
+     */
+    type: string;
+    /**
+     * Sets or retrieves the URL, often with a bookmark extension (#name), to use as a client-side image map.
+     */
+    useMap: string;
+    /**
+     * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
+     */
+    readonly validationMessage: string;
+    /**
+     * Returns a  ValidityState object that represents the validity states of an element.
+     */
+    readonly validity: ValidityState;
+    vspace: number;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: string;
+    /**
+     * Returns whether an element will successfully validate based on forms validation rules and constraints.
+     */
+    readonly willValidate: boolean;
+    /**
+     * Returns whether a form will validate when it is submitted, without having to submit it.
+     */
+    checkValidity(): boolean;
+    /**
+     * Sets a custom error message that is displayed when a form is submitted.
+     * @param error Sets a custom error message that is displayed when a form is submitted.
+     */
+    setCustomValidity(error: string): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLObjectElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLObjectElement: {
+    prototype: HTMLObjectElement;
+    new(): HTMLObjectElement;
+};
+
+interface HTMLOListElement extends HTMLElement {
+    compact: boolean;
+    /**
+     * The starting number.
+     */
+    start: number;
+    type: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLOListElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLOListElement: {
+    prototype: HTMLOListElement;
+    new(): HTMLOListElement;
+};
+
+interface HTMLOptGroupElement extends HTMLElement {
+    /**
+     * Sets or retrieves the status of an option.
+     */
+    defaultSelected: boolean;
+    disabled: boolean;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Sets or retrieves the ordinal position of an option in a list box.
+     */
+    readonly index: number;
+    /**
+     * Sets or retrieves a value that you can use to implement your own label functionality for the object.
+     */
+    label: string;
+    /**
+     * Sets or retrieves whether the option in the list box is the default item.
+     */
+    selected: boolean;
+    /**
+     * Sets or retrieves the text string specified by the option tag.
+     */
+    readonly text: string;
+    /**
+     * Sets or retrieves the value which is returned to the server when the form control is submitted.
+     */
+    value: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLOptGroupElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLOptGroupElement: {
+    prototype: HTMLOptGroupElement;
+    new(): HTMLOptGroupElement;
+};
+
+interface HTMLOptionElement extends HTMLElement {
+    /**
+     * Sets or retrieves the status of an option.
+     */
+    defaultSelected: boolean;
+    disabled: boolean;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Sets or retrieves the ordinal position of an option in a list box.
+     */
+    readonly index: number;
+    /**
+     * Sets or retrieves a value that you can use to implement your own label functionality for the object.
+     */
+    label: string;
+    /**
+     * Sets or retrieves whether the option in the list box is the default item.
+     */
+    selected: boolean;
+    /**
+     * Sets or retrieves the text string specified by the option tag.
+     */
+    text: string;
+    /**
+     * Sets or retrieves the value which is returned to the server when the form control is submitted.
+     */
+    value: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLOptionElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLOptionElement: {
+    prototype: HTMLOptionElement;
+    new(): HTMLOptionElement;
+};
+
+interface HTMLOptionsCollection extends HTMLCollectionOf<HTMLOptionElement> {
+    length: number;
+    selectedIndex: number;
+    add(element: HTMLOptionElement | HTMLOptGroupElement, before?: HTMLElement | number): void;
+    remove(index: number): void;
+}
+
+declare var HTMLOptionsCollection: {
+    prototype: HTMLOptionsCollection;
+    new(): HTMLOptionsCollection;
+};
+
+interface HTMLOutputElement extends HTMLElement {
+    defaultValue: string;
+    readonly form: HTMLFormElement;
+    readonly htmlFor: DOMSettableTokenList;
+    name: string;
+    readonly type: string;
+    readonly validationMessage: string;
+    readonly validity: ValidityState;
+    value: string;
+    readonly willValidate: boolean;
+    checkValidity(): boolean;
+    reportValidity(): boolean;
+    setCustomValidity(error: string): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLOutputElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLOutputElement: {
+    prototype: HTMLOutputElement;
+    new(): HTMLOutputElement;
+};
+
+interface HTMLParagraphElement extends HTMLElement {
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    clear: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLParagraphElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLParagraphElement: {
+    prototype: HTMLParagraphElement;
+    new(): HTMLParagraphElement;
+};
+
+interface HTMLParamElement extends HTMLElement {
+    /**
+     * Sets or retrieves the name of an input parameter for an element.
+     */
+    name: string;
+    /**
+     * Sets or retrieves the content type of the resource designated by the value attribute.
+     */
+    type: string;
+    /**
+     * Sets or retrieves the value of an input parameter for an element.
+     */
+    value: string;
+    /**
+     * Sets or retrieves the data type of the value attribute.
+     */
+    valueType: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLParamElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLParamElement: {
+    prototype: HTMLParamElement;
+    new(): HTMLParamElement;
+};
+
+interface HTMLPictureElement extends HTMLElement {
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLPictureElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLPictureElement: {
+    prototype: HTMLPictureElement;
+    new(): HTMLPictureElement;
+};
+
+interface HTMLPreElement extends HTMLElement {
+    /**
+     * Sets or gets a value that you can use to implement your own width functionality for the object.
+     */
+    width: number;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLPreElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLPreElement: {
+    prototype: HTMLPreElement;
+    new(): HTMLPreElement;
+};
+
+interface HTMLProgressElement extends HTMLElement {
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Defines the maximum, or "done" value for a progress element.
+     */
+    max: number;
+    /**
+     * Returns the quotient of value/max when the value attribute is set (determinate progress bar), or -1 when the value attribute is missing (indeterminate progress bar).
+     */
+    readonly position: number;
+    /**
+     * Sets or gets the current value of a progress element. The value must be a non-negative number between 0 and the max value.
+     */
+    value: number;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLProgressElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLProgressElement: {
+    prototype: HTMLProgressElement;
+    new(): HTMLProgressElement;
+};
+
+interface HTMLQuoteElement extends HTMLElement {
+    /**
+     * Sets or retrieves reference information about the object.
+     */
+    cite: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLQuoteElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLQuoteElement: {
+    prototype: HTMLQuoteElement;
+    new(): HTMLQuoteElement;
+};
+
+interface HTMLScriptElement extends HTMLElement {
+    async: boolean;
+    /**
+     * Sets or retrieves the character set used to encode the object.
+     */
+    charset: string;
+    crossOrigin: string | null;
+    /**
+     * Sets or retrieves the status of the script.
+     */
+    defer: boolean;
+    /**
+     * Sets or retrieves the event for which the script is written.
+     */
+    event: string;
+    /**
+     * Sets or retrieves the object that is bound to the event script.
+     */
+    htmlFor: string;
+    /**
+     * Retrieves the URL to an external file that contains the source code or data.
+     */
+    src: string;
+    /**
+     * Retrieves or sets the text of the object as a string.
+     */
+    text: string;
+    /**
+     * Sets or retrieves the MIME type for the associated scripting engine.
+     */
+    type: string;
+    integrity: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLScriptElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLScriptElement: {
+    prototype: HTMLScriptElement;
+    new(): HTMLScriptElement;
+};
+
+interface HTMLSelectElement extends HTMLElement {
+    /**
+     * Provides a way to direct a user to a specific field when a document loads. This can provide both direction and convenience for a user, reducing the need to click or tab to a field when a page opens. This attribute is true when present on an element, and false when missing.
+     */
+    autofocus: boolean;
+    disabled: boolean;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Sets or retrieves the number of objects in a collection.
+     */
+    length: number;
+    /**
+     * Sets or retrieves the Boolean value indicating whether multiple items can be selected from a list.
+     */
+    multiple: boolean;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    readonly options: HTMLOptionsCollection;
+    /**
+     * When present, marks an element that can't be submitted without a value.
+     */
+    required: boolean;
+    /**
+     * Sets or retrieves the index of the selected option in a select object.
+     */
+    selectedIndex: number;
+    selectedOptions: HTMLCollectionOf<HTMLOptionElement>;
+    /**
+     * Sets or retrieves the number of rows in the list box.
+     */
+    size: number;
+    /**
+     * Retrieves the type of select control based on the value of the MULTIPLE attribute.
+     */
+    readonly type: string;
+    /**
+     * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
+     */
+    readonly validationMessage: string;
+    /**
+     * Returns a  ValidityState object that represents the validity states of an element.
+     */
+    readonly validity: ValidityState;
+    /**
+     * Sets or retrieves the value which is returned to the server when the form control is submitted.
+     */
+    value: string;
+    /**
+     * Returns whether an element will successfully validate based on forms validation rules and constraints.
+     */
+    readonly willValidate: boolean;
+    /**
+     * Adds an element to the areas, controlRange, or options collection.
+     * @param element Variant of type Number that specifies the index position in the collection where the element is placed. If no value is given, the method places the element at the end of the collection.
+     * @param before Variant of type Object that specifies an element to insert before, or null to append the object to the collection.
+     */
+    add(element: HTMLElement, before?: HTMLElement | number): void;
+    /**
+     * Returns whether a form will validate when it is submitted, without having to submit it.
+     */
+    checkValidity(): boolean;
+    /**
+     * Retrieves a select object or an object from an options collection.
+     * @param name Variant of type Number or String that specifies the object or collection to retrieve. If this parameter is an integer, it is the zero-based index of the object. If this parameter is a string, all objects with matching name or id properties are retrieved, and a collection is returned if more than one match is made.
+     * @param index Variant of type Number that specifies the zero-based index of the object to retrieve when a collection is returned.
+     */
+    item(name?: any, index?: any): any;
+    /**
+     * Retrieves a select object or an object from an options collection.
+     * @param namedItem A String that specifies the name or id property of the object to retrieve. A collection is returned if more than one match is made.
+     */
+    namedItem(name: string): any;
+    /**
+     * Removes an element from the collection.
+     * @param index Number that specifies the zero-based index of the element to remove from the collection.
+     */
+    remove(index?: number): void;
+    /**
+     * Sets a custom error message that is displayed when a form is submitted.
+     * @param error Sets a custom error message that is displayed when a form is submitted.
+     */
+    setCustomValidity(error: string): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLSelectElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+    [name: string]: any;
+}
+
+declare var HTMLSelectElement: {
+    prototype: HTMLSelectElement;
+    new(): HTMLSelectElement;
+};
+
+interface HTMLSourceElement extends HTMLElement {
+    /**
+     * Gets or sets the intended media type of the media source.
+     */
+    media: string;
+    msKeySystem: string;
+    sizes: string;
+    /**
+     * The address or URL of the a media resource that is to be considered.
+     */
+    src: string;
+    srcset: string;
+    /**
+     * Gets or sets the MIME type of a media resource.
+     */
+    type: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLSourceElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLSourceElement: {
+    prototype: HTMLSourceElement;
+    new(): HTMLSourceElement;
+};
+
+interface HTMLSpanElement extends HTMLElement {
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLSpanElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLSpanElement: {
+    prototype: HTMLSpanElement;
+    new(): HTMLSpanElement;
+};
+
+interface HTMLStyleElement extends HTMLElement, LinkStyle {
+    disabled: boolean;
+    /**
+     * Sets or retrieves the media type.
+     */
+    media: string;
+    /**
+     * Retrieves the CSS language in which the style sheet is written.
+     */
+    type: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLStyleElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLStyleElement: {
+    prototype: HTMLStyleElement;
+    new(): HTMLStyleElement;
+};
+
+interface HTMLTableCaptionElement extends HTMLElement {
+    /**
+     * Sets or retrieves the alignment of the caption or legend.
+     */
+    align: string;
+    /**
+     * Sets or retrieves whether the caption appears at the top or bottom of the table.
+     */
+    vAlign: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTableCaptionElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTableCaptionElement: {
+    prototype: HTMLTableCaptionElement;
+    new(): HTMLTableCaptionElement;
+};
+
+interface HTMLTableCellElement extends HTMLElement, HTMLTableAlignment {
+    /**
+     * Sets or retrieves abbreviated text for the object.
+     */
+    abbr: string;
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    /**
+     * Sets or retrieves a comma-delimited list of conceptual categories associated with the object.
+     */
+    axis: string;
+    bgColor: any;
+    /**
+     * Retrieves the position of the object in the cells collection of a row.
+     */
+    readonly cellIndex: number;
+    /**
+     * Sets or retrieves the number columns in the table that the object should span.
+     */
+    colSpan: number;
+    /**
+     * Sets or retrieves a list of header cells that provide information for the object.
+     */
+    headers: string;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: any;
+    /**
+     * Sets or retrieves whether the browser automatically performs wordwrap.
+     */
+    noWrap: boolean;
+    /**
+     * Sets or retrieves how many rows in a table the cell should span.
+     */
+    rowSpan: number;
+    /**
+     * Sets or retrieves the group of cells in a table to which the object's information applies.
+     */
+    scope: string;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTableCellElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTableCellElement: {
+    prototype: HTMLTableCellElement;
+    new(): HTMLTableCellElement;
+};
+
+interface HTMLTableColElement extends HTMLElement, HTMLTableAlignment {
+    /**
+     * Sets or retrieves the alignment of the object relative to the display or table.
+     */
+    align: string;
+    /**
+     * Sets or retrieves the number of columns in the group.
+     */
+    span: number;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: any;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTableColElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTableColElement: {
+    prototype: HTMLTableColElement;
+    new(): HTMLTableColElement;
+};
+
+interface HTMLTableDataCellElement extends HTMLTableCellElement {
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTableDataCellElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTableDataCellElement: {
+    prototype: HTMLTableDataCellElement;
+    new(): HTMLTableDataCellElement;
+};
+
+interface HTMLTableElement extends HTMLElement {
+    /**
+     * Sets or retrieves a value that indicates the table alignment.
+     */
+    align: string;
+    bgColor: any;
+    /**
+     * Sets or retrieves the width of the border to draw around the object.
+     */
+    border: string;
+    /**
+     * Sets or retrieves the border color of the object.
+     */
+    borderColor: any;
+    /**
+     * Retrieves the caption object of a table.
+     */
+    caption: HTMLTableCaptionElement;
+    /**
+     * Sets or retrieves the amount of space between the border of the cell and the content of the cell.
+     */
+    cellPadding: string;
+    /**
+     * Sets or retrieves the amount of space between cells in a table.
+     */
+    cellSpacing: string;
+    /**
+     * Sets or retrieves the number of columns in the table.
+     */
+    cols: number;
+    /**
+     * Sets or retrieves the way the border frame around the table is displayed.
+     */
+    frame: string;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: any;
+    /**
+     * Sets or retrieves the number of horizontal rows contained in the object.
+     */
+    rows: HTMLCollectionOf<HTMLTableRowElement>;
+    /**
+     * Sets or retrieves which dividing lines (inner borders) are displayed.
+     */
+    rules: string;
+    /**
+     * Sets or retrieves a description and/or structure of the object.
+     */
+    summary: string;
+    /**
+     * Retrieves a collection of all tBody objects in the table. Objects in this collection are in source order.
+     */
+    tBodies: HTMLCollectionOf<HTMLTableSectionElement>;
+    /**
+     * Retrieves the tFoot object of the table.
+     */
+    tFoot: HTMLTableSectionElement;
+    /**
+     * Retrieves the tHead object of the table.
+     */
+    tHead: HTMLTableSectionElement;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    width: string;
+    /**
+     * Creates an empty caption element in the table.
+     */
+    createCaption(): HTMLTableCaptionElement;
+    /**
+     * Creates an empty tBody element in the table.
+     */
+    createTBody(): HTMLTableSectionElement;
+    /**
+     * Creates an empty tFoot element in the table.
+     */
+    createTFoot(): HTMLTableSectionElement;
+    /**
+     * Returns the tHead element object if successful, or null otherwise.
+     */
+    createTHead(): HTMLTableSectionElement;
+    /**
+     * Deletes the caption element and its contents from the table.
+     */
+    deleteCaption(): void;
+    /**
+     * Removes the specified row (tr) from the element and from the rows collection.
+     * @param index Number that specifies the zero-based position in the rows collection of the row to remove.
+     */
+    deleteRow(index?: number): void;
+    /**
+     * Deletes the tFoot element and its contents from the table.
+     */
+    deleteTFoot(): void;
+    /**
+     * Deletes the tHead element and its contents from the table.
+     */
+    deleteTHead(): void;
+    /**
+     * Creates a new row (tr) in the table, and adds the row to the rows collection.
+     * @param index Number that specifies where to insert the row in the rows collection. The default value is -1, which appends the new row to the end of the rows collection.
+     */
+    insertRow(index?: number): HTMLTableRowElement;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTableElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTableElement: {
+    prototype: HTMLTableElement;
+    new(): HTMLTableElement;
+};
+
+interface HTMLTableHeaderCellElement extends HTMLTableCellElement {
+    /**
+     * Sets or retrieves the group of cells in a table to which the object's information applies.
+     */
+    scope: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTableHeaderCellElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTableHeaderCellElement: {
+    prototype: HTMLTableHeaderCellElement;
+    new(): HTMLTableHeaderCellElement;
+};
+
+interface HTMLTableRowElement extends HTMLElement, HTMLTableAlignment {
+    /**
+     * Sets or retrieves how the object is aligned with adjacent text.
+     */
+    align: string;
+    bgColor: any;
+    /**
+     * Retrieves a collection of all cells in the table row.
+     */
+    cells: HTMLCollectionOf<HTMLTableDataCellElement | HTMLTableHeaderCellElement>;
+    /**
+     * Sets or retrieves the height of the object.
+     */
+    height: any;
+    /**
+     * Retrieves the position of the object in the rows collection for the table.
+     */
+    readonly rowIndex: number;
+    /**
+     * Retrieves the position of the object in the collection.
+     */
+    readonly sectionRowIndex: number;
+    /**
+     * Removes the specified cell from the table row, as well as from the cells collection.
+     * @param index Number that specifies the zero-based position of the cell to remove from the table row. If no value is provided, the last cell in the cells collection is deleted.
+     */
+    deleteCell(index?: number): void;
+    /**
+     * Creates a new cell in the table row, and adds the cell to the cells collection.
+     * @param index Number that specifies where to insert the cell in the tr. The default value is -1, which appends the new cell to the end of the cells collection.
+     */
+    insertCell(index?: number): HTMLTableDataCellElement;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTableRowElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTableRowElement: {
+    prototype: HTMLTableRowElement;
+    new(): HTMLTableRowElement;
+};
+
+interface HTMLTableSectionElement extends HTMLElement, HTMLTableAlignment {
+    /**
+     * Sets or retrieves a value that indicates the table alignment.
+     */
+    align: string;
+    /**
+     * Sets or retrieves the number of horizontal rows contained in the object.
+     */
+    rows: HTMLCollectionOf<HTMLTableRowElement>;
+    /**
+     * Removes the specified row (tr) from the element and from the rows collection.
+     * @param index Number that specifies the zero-based position in the rows collection of the row to remove.
+     */
+    deleteRow(index?: number): void;
+    /**
+     * Creates a new row (tr) in the table, and adds the row to the rows collection.
+     * @param index Number that specifies where to insert the row in the rows collection. The default value is -1, which appends the new row to the end of the rows collection.
+     */
+    insertRow(index?: number): HTMLTableRowElement;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTableSectionElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTableSectionElement: {
+    prototype: HTMLTableSectionElement;
+    new(): HTMLTableSectionElement;
+};
+
+interface HTMLTemplateElement extends HTMLElement {
+    readonly content: DocumentFragment;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTemplateElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTemplateElement: {
+    prototype: HTMLTemplateElement;
+    new(): HTMLTemplateElement;
+};
+
+interface HTMLTextAreaElement extends HTMLElement {
+    /**
+     * Provides a way to direct a user to a specific field when a document loads. This can provide both direction and convenience for a user, reducing the need to click or tab to a field when a page opens. This attribute is true when present on an element, and false when missing.
+     */
+    autofocus: boolean;
+    /**
+     * Sets or retrieves the width of the object.
+     */
+    cols: number;
+    /**
+     * Sets or retrieves the initial contents of the object.
+     */
+    defaultValue: string;
+    disabled: boolean;
+    /**
+     * Retrieves a reference to the form that the object is embedded in.
+     */
+    readonly form: HTMLFormElement;
+    /**
+     * Sets or retrieves the maximum number of characters that the user can enter in a text control.
+     */
+    maxLength: number;
+    /**
+     * Sets or retrieves the name of the object.
+     */
+    name: string;
+    /**
+     * Gets or sets a text string that is displayed in an input field as a hint or prompt to users as the format or type of information they need to enter.The text appears in an input field until the user puts focus on the field.
+     */
+    placeholder: string;
+    /**
+     * Sets or retrieves the value indicated whether the content of the object is read-only.
+     */
+    readOnly: boolean;
+    /**
+     * When present, marks an element that can't be submitted without a value.
+     */
+    required: boolean;
+    /**
+     * Sets or retrieves the number of horizontal rows contained in the object.
+     */
+    rows: number;
+    /**
+     * Gets or sets the end position or offset of a text selection.
+     */
+    selectionEnd: number;
+    /**
+     * Gets or sets the starting position or offset of a text selection.
+     */
+    selectionStart: number;
+    /**
+     * Sets or retrieves the value indicating whether the control is selected.
+     */
+    status: any;
+    /**
+     * Retrieves the type of control.
+     */
+    readonly type: string;
+    /**
+     * Returns the error message that would be displayed if the user submits the form, or an empty string if no error message. It also triggers the standard error message, such as "this is a required field". The result is that the user sees validation messages without actually submitting.
+     */
+    readonly validationMessage: string;
+    /**
+     * Returns a  ValidityState object that represents the validity states of an element.
+     */
+    readonly validity: ValidityState;
+    /**
+     * Retrieves or sets the text in the entry field of the textArea element.
+     */
+    value: string;
+    /**
+     * Returns whether an element will successfully validate based on forms validation rules and constraints.
+     */
+    readonly willValidate: boolean;
+    /**
+     * Sets or retrieves how to handle wordwrapping in the object.
+     */
+    wrap: string;
+    minLength: number;
+    /**
+     * Returns whether a form will validate when it is submitted, without having to submit it.
+     */
+    checkValidity(): boolean;
+    /**
+     * Highlights the input area of a form element.
+     */
+    select(): void;
+    /**
+     * Sets a custom error message that is displayed when a form is submitted.
+     * @param error Sets a custom error message that is displayed when a form is submitted.
+     */
+    setCustomValidity(error: string): void;
+    /**
+     * Sets the start and end positions of a selection in a text field.
+     * @param start The offset into the text field for the start of the selection.
+     * @param end The offset into the text field for the end of the selection.
+     */
+    setSelectionRange(start: number, end: number): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTextAreaElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTextAreaElement: {
+    prototype: HTMLTextAreaElement;
+    new(): HTMLTextAreaElement;
+};
+
+interface HTMLTimeElement extends HTMLElement {
+    dateTime: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTimeElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTimeElement: {
+    prototype: HTMLTimeElement;
+    new(): HTMLTimeElement;
+};
+
+interface HTMLTitleElement extends HTMLElement {
+    /**
+     * Retrieves or sets the text of the object as a string.
+     */
+    text: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTitleElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTitleElement: {
+    prototype: HTMLTitleElement;
+    new(): HTMLTitleElement;
+};
+
+interface HTMLTrackElement extends HTMLElement {
+    default: boolean;
+    kind: string;
+    label: string;
+    readonly readyState: number;
+    src: string;
+    srclang: string;
+    readonly track: TextTrack;
+    readonly ERROR: number;
+    readonly LOADED: number;
+    readonly LOADING: number;
+    readonly NONE: number;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLTrackElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLTrackElement: {
+    prototype: HTMLTrackElement;
+    new(): HTMLTrackElement;
+    readonly ERROR: number;
+    readonly LOADED: number;
+    readonly LOADING: number;
+    readonly NONE: number;
+};
+
+interface HTMLUListElement extends HTMLElement {
+    compact: boolean;
+    type: string;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLUListElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLUListElement: {
+    prototype: HTMLUListElement;
+    new(): HTMLUListElement;
+};
+
+interface HTMLUnknownElement extends HTMLElement {
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLUnknownElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLUnknownElement: {
+    prototype: HTMLUnknownElement;
+    new(): HTMLUnknownElement;
+};
+
+interface HTMLVideoElementEventMap extends HTMLMediaElementEventMap {
+    "MSVideoFormatChanged": Event;
+    "MSVideoFrameStepCompleted": Event;
+    "MSVideoOptimalLayoutChanged": Event;
+}
+
+interface HTMLVideoElement extends HTMLMediaElement {
+    /**
+     * Gets or sets the height of the video element.
+     */
+    height: number;
+    msHorizontalMirror: boolean;
+    readonly msIsLayoutOptimalForPlayback: boolean;
+    readonly msIsStereo3D: boolean;
+    msStereo3DPackingMode: string;
+    msStereo3DRenderMode: string;
+    msZoom: boolean;
+    onMSVideoFormatChanged: (this: HTMLVideoElement, ev: Event) => any;
+    onMSVideoFrameStepCompleted: (this: HTMLVideoElement, ev: Event) => any;
+    onMSVideoOptimalLayoutChanged: (this: HTMLVideoElement, ev: Event) => any;
+    /**
+     * Gets or sets a URL of an image to display, for example, like a movie poster. This can be a still frame from the video, or another image if no video data is available.
+     */
+    poster: string;
+    /**
+     * Gets the intrinsic height of a video in CSS pixels, or zero if the dimensions are not known.
+     */
+    readonly videoHeight: number;
+    /**
+     * Gets the intrinsic width of a video in CSS pixels, or zero if the dimensions are not known.
+     */
+    readonly videoWidth: number;
+    readonly webkitDisplayingFullscreen: boolean;
+    readonly webkitSupportsFullscreen: boolean;
+    /**
+     * Gets or sets the width of the video element.
+     */
+    width: number;
+    getVideoPlaybackQuality(): VideoPlaybackQuality;
+    msFrameStep(forward: boolean): void;
+    msInsertVideoEffect(activatableClassId: string, effectRequired: boolean, config?: any): void;
+    msSetVideoRectangle(left: number, top: number, right: number, bottom: number): void;
+    webkitEnterFullscreen(): void;
+    webkitEnterFullScreen(): void;
+    webkitExitFullscreen(): void;
+    webkitExitFullScreen(): void;
+    addEventListener<K extends keyof HTMLVideoElementEventMap>(type: K, listener: (this: HTMLVideoElement, ev: HTMLVideoElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var HTMLVideoElement: {
+    prototype: HTMLVideoElement;
+    new(): HTMLVideoElement;
+};
+
+interface IDBCursor {
+    readonly direction: IDBCursorDirection;
+    key: IDBKeyRange | IDBValidKey;
+    readonly primaryKey: any;
+    source: IDBObjectStore | IDBIndex;
+    advance(count: number): void;
+    continue(key?: IDBKeyRange | IDBValidKey): void;
+    delete(): IDBRequest;
+    update(value: any): IDBRequest;
+    readonly NEXT: string;
+    readonly NEXT_NO_DUPLICATE: string;
+    readonly PREV: string;
+    readonly PREV_NO_DUPLICATE: string;
+}
+
+declare var IDBCursor: {
+    prototype: IDBCursor;
+    new(): IDBCursor;
+    readonly NEXT: string;
+    readonly NEXT_NO_DUPLICATE: string;
+    readonly PREV: string;
+    readonly PREV_NO_DUPLICATE: string;
+};
+
+interface IDBCursorWithValue extends IDBCursor {
+    readonly value: any;
+}
+
+declare var IDBCursorWithValue: {
+    prototype: IDBCursorWithValue;
+    new(): IDBCursorWithValue;
+};
+
+interface IDBDatabaseEventMap {
+    "abort": Event;
+    "error": Event;
+}
+
+interface IDBDatabase extends EventTarget {
+    readonly name: string;
+    readonly objectStoreNames: DOMStringList;
+    onabort: (this: IDBDatabase, ev: Event) => any;
+    onerror: (this: IDBDatabase, ev: Event) => any;
+    version: number;
+    onversionchange: (ev: IDBVersionChangeEvent) => any;
+    close(): void;
+    createObjectStore(name: string, optionalParameters?: IDBObjectStoreParameters): IDBObjectStore;
+    deleteObjectStore(name: string): void;
+    transaction(storeNames: string | string[], mode?: IDBTransactionMode): IDBTransaction;
+    addEventListener(type: "versionchange", listener: (ev: IDBVersionChangeEvent) => any, useCapture?: boolean): void;
+    addEventListener<K extends keyof IDBDatabaseEventMap>(type: K, listener: (this: IDBDatabase, ev: IDBDatabaseEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var IDBDatabase: {
+    prototype: IDBDatabase;
+    new(): IDBDatabase;
+};
+
+interface IDBFactory {
+    cmp(first: any, second: any): number;
+    deleteDatabase(name: string): IDBOpenDBRequest;
+    open(name: string, version?: number): IDBOpenDBRequest;
+}
+
+declare var IDBFactory: {
+    prototype: IDBFactory;
+    new(): IDBFactory;
+};
+
+interface IDBIndex {
+    keyPath: string | string[];
+    readonly name: string;
+    readonly objectStore: IDBObjectStore;
+    readonly unique: boolean;
+    multiEntry: boolean;
+    count(key?: IDBKeyRange | IDBValidKey): IDBRequest;
+    get(key: IDBKeyRange | IDBValidKey): IDBRequest;
+    getKey(key: IDBKeyRange | IDBValidKey): IDBRequest;
+    openCursor(range?: IDBKeyRange | IDBValidKey, direction?: IDBCursorDirection): IDBRequest;
+    openKeyCursor(range?: IDBKeyRange | IDBValidKey, direction?: IDBCursorDirection): IDBRequest;
+}
+
+declare var IDBIndex: {
+    prototype: IDBIndex;
+    new(): IDBIndex;
+};
+
+interface IDBKeyRange {
+    readonly lower: any;
+    readonly lowerOpen: boolean;
+    readonly upper: any;
+    readonly upperOpen: boolean;
+}
+
+declare var IDBKeyRange: {
+    prototype: IDBKeyRange;
+    new(): IDBKeyRange;
+    bound(lower: any, upper: any, lowerOpen?: boolean, upperOpen?: boolean): IDBKeyRange;
+    lowerBound(lower: any, open?: boolean): IDBKeyRange;
+    only(value: any): IDBKeyRange;
+    upperBound(upper: any, open?: boolean): IDBKeyRange;
+};
+
+interface IDBObjectStore {
+    readonly indexNames: DOMStringList;
+    keyPath: string | string[];
+    readonly name: string;
+    readonly transaction: IDBTransaction;
+    autoIncrement: boolean;
+    add(value: any, key?: IDBKeyRange | IDBValidKey): IDBRequest;
+    clear(): IDBRequest;
+    count(key?: IDBKeyRange | IDBValidKey): IDBRequest;
+    createIndex(name: string, keyPath: string | string[], optionalParameters?: IDBIndexParameters): IDBIndex;
+    delete(key: IDBKeyRange | IDBValidKey): IDBRequest;
+    deleteIndex(indexName: string): void;
+    get(key: any): IDBRequest;
+    index(name: string): IDBIndex;
+    openCursor(range?: IDBKeyRange | IDBValidKey, direction?: IDBCursorDirection): IDBRequest;
+    put(value: any, key?: IDBKeyRange | IDBValidKey): IDBRequest;
+}
+
+declare var IDBObjectStore: {
+    prototype: IDBObjectStore;
+    new(): IDBObjectStore;
+};
+
+interface IDBOpenDBRequestEventMap extends IDBRequestEventMap {
+    "blocked": Event;
+    "upgradeneeded": IDBVersionChangeEvent;
+}
+
+interface IDBOpenDBRequest extends IDBRequest {
+    onblocked: (this: IDBOpenDBRequest, ev: Event) => any;
+    onupgradeneeded: (this: IDBOpenDBRequest, ev: IDBVersionChangeEvent) => any;
+    addEventListener<K extends keyof IDBOpenDBRequestEventMap>(type: K, listener: (this: IDBOpenDBRequest, ev: IDBOpenDBRequestEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var IDBOpenDBRequest: {
+    prototype: IDBOpenDBRequest;
+    new(): IDBOpenDBRequest;
+};
+
+interface IDBRequestEventMap {
+    "error": Event;
+    "success": Event;
+}
+
+interface IDBRequest extends EventTarget {
+    readonly error: DOMException;
+    onerror: (this: IDBRequest, ev: Event) => any;
+    onsuccess: (this: IDBRequest, ev: Event) => any;
+    readonly readyState: IDBRequestReadyState;
+    readonly result: any;
+    source: IDBObjectStore | IDBIndex | IDBCursor;
+    readonly transaction: IDBTransaction;
+    addEventListener<K extends keyof IDBRequestEventMap>(type: K, listener: (this: IDBRequest, ev: IDBRequestEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var IDBRequest: {
+    prototype: IDBRequest;
+    new(): IDBRequest;
+};
+
+interface IDBTransactionEventMap {
+    "abort": Event;
+    "complete": Event;
+    "error": Event;
+}
+
+interface IDBTransaction extends EventTarget {
+    readonly db: IDBDatabase;
+    readonly error: DOMException;
+    readonly mode: IDBTransactionMode;
+    onabort: (this: IDBTransaction, ev: Event) => any;
+    oncomplete: (this: IDBTransaction, ev: Event) => any;
+    onerror: (this: IDBTransaction, ev: Event) => any;
+    abort(): void;
+    objectStore(name: string): IDBObjectStore;
+    readonly READ_ONLY: string;
+    readonly READ_WRITE: string;
+    readonly VERSION_CHANGE: string;
+    addEventListener<K extends keyof IDBTransactionEventMap>(type: K, listener: (this: IDBTransaction, ev: IDBTransactionEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var IDBTransaction: {
+    prototype: IDBTransaction;
+    new(): IDBTransaction;
+    readonly READ_ONLY: string;
+    readonly READ_WRITE: string;
+    readonly VERSION_CHANGE: string;
+};
+
+interface IDBVersionChangeEvent extends Event {
+    readonly newVersion: number | null;
+    readonly oldVersion: number;
+}
+
+declare var IDBVersionChangeEvent: {
+    prototype: IDBVersionChangeEvent;
+    new(): IDBVersionChangeEvent;
+};
+
+interface IIRFilterNode extends AudioNode {
+    getFrequencyResponse(frequencyHz: Float32Array, magResponse: Float32Array, phaseResponse: Float32Array): void;
+}
+
+declare var IIRFilterNode: {
+    prototype: IIRFilterNode;
+    new(): IIRFilterNode;
+};
+
+interface ImageData {
+    data: Uint8ClampedArray;
+    readonly height: number;
+    readonly width: number;
+}
+
+declare var ImageData: {
+    prototype: ImageData;
+    new(width: number, height: number): ImageData;
+    new(array: Uint8ClampedArray, width: number, height: number): ImageData;
+};
+
+interface IntersectionObserver {
+    readonly root: Element | null;
+    readonly rootMargin: string;
+    readonly thresholds: number[];
+    disconnect(): void;
+    observe(target: Element): void;
+    takeRecords(): IntersectionObserverEntry[];
+    unobserve(target: Element): void;
+}
+
+declare var IntersectionObserver: {
+    prototype: IntersectionObserver;
+    new(callback: IntersectionObserverCallback, options?: IntersectionObserverInit): IntersectionObserver;
+};
+
+interface IntersectionObserverEntry {
+    readonly boundingClientRect: ClientRect;
+    readonly intersectionRatio: number;
+    readonly intersectionRect: ClientRect;
+    readonly rootBounds: ClientRect;
+    readonly target: Element;
+    readonly time: number;
+}
+
+declare var IntersectionObserverEntry: {
+    prototype: IntersectionObserverEntry;
+    new(intersectionObserverEntryInit: IntersectionObserverEntryInit): IntersectionObserverEntry;
+};
+
+interface KeyboardEvent extends UIEvent {
+    readonly altKey: boolean;
+    readonly char: string | null;
+    readonly charCode: number;
+    readonly ctrlKey: boolean;
+    readonly key: string;
+    readonly keyCode: number;
+    readonly locale: string;
+    readonly location: number;
+    readonly metaKey: boolean;
+    readonly repeat: boolean;
+    readonly shiftKey: boolean;
+    readonly which: number;
+    readonly code: string;
+    getModifierState(keyArg: string): boolean;
+    initKeyboardEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, keyArg: string, locationArg: number, modifiersListArg: string, repeat: boolean, locale: string): void;
+    readonly DOM_KEY_LOCATION_JOYSTICK: number;
+    readonly DOM_KEY_LOCATION_LEFT: number;
+    readonly DOM_KEY_LOCATION_MOBILE: number;
+    readonly DOM_KEY_LOCATION_NUMPAD: number;
+    readonly DOM_KEY_LOCATION_RIGHT: number;
+    readonly DOM_KEY_LOCATION_STANDARD: number;
+}
+
+declare var KeyboardEvent: {
+    prototype: KeyboardEvent;
+    new(typeArg: string, eventInitDict?: KeyboardEventInit): KeyboardEvent;
+    readonly DOM_KEY_LOCATION_JOYSTICK: number;
+    readonly DOM_KEY_LOCATION_LEFT: number;
+    readonly DOM_KEY_LOCATION_MOBILE: number;
+    readonly DOM_KEY_LOCATION_NUMPAD: number;
+    readonly DOM_KEY_LOCATION_RIGHT: number;
+    readonly DOM_KEY_LOCATION_STANDARD: number;
+};
+
+interface ListeningStateChangedEvent extends Event {
+    readonly label: string;
+    readonly state: ListeningState;
+}
+
+declare var ListeningStateChangedEvent: {
+    prototype: ListeningStateChangedEvent;
+    new(): ListeningStateChangedEvent;
+};
+
+interface Location {
+    hash: string;
+    host: string;
+    hostname: string;
+    href: string;
+    readonly origin: string;
+    pathname: string;
+    port: string;
+    protocol: string;
+    search: string;
+    assign(url: string): void;
+    reload(forcedReload?: boolean): void;
+    replace(url: string): void;
+    toString(): string;
+}
+
+declare var Location: {
+    prototype: Location;
+    new(): Location;
+};
+
+interface LongRunningScriptDetectedEvent extends Event {
+    readonly executionTime: number;
+    stopPageScriptExecution: boolean;
+}
+
+declare var LongRunningScriptDetectedEvent: {
+    prototype: LongRunningScriptDetectedEvent;
+    new(): LongRunningScriptDetectedEvent;
+};
+
+interface MediaDeviceInfo {
+    readonly deviceId: string;
+    readonly groupId: string;
+    readonly kind: MediaDeviceKind;
+    readonly label: string;
+}
+
+declare var MediaDeviceInfo: {
+    prototype: MediaDeviceInfo;
+    new(): MediaDeviceInfo;
+};
+
+interface MediaDevicesEventMap {
+    "devicechange": Event;
+}
+
+interface MediaDevices extends EventTarget {
+    ondevicechange: (this: MediaDevices, ev: Event) => any;
+    enumerateDevices(): any;
+    getSupportedConstraints(): MediaTrackSupportedConstraints;
+    getUserMedia(constraints: MediaStreamConstraints): Promise<MediaStream>;
+    addEventListener<K extends keyof MediaDevicesEventMap>(type: K, listener: (this: MediaDevices, ev: MediaDevicesEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MediaDevices: {
+    prototype: MediaDevices;
+    new(): MediaDevices;
+};
+
+interface MediaElementAudioSourceNode extends AudioNode {
+}
+
+declare var MediaElementAudioSourceNode: {
+    prototype: MediaElementAudioSourceNode;
+    new(): MediaElementAudioSourceNode;
+};
+
+interface MediaEncryptedEvent extends Event {
+    readonly initData: ArrayBuffer | null;
+    readonly initDataType: string;
+}
+
+declare var MediaEncryptedEvent: {
+    prototype: MediaEncryptedEvent;
+    new(type: string, eventInitDict?: MediaEncryptedEventInit): MediaEncryptedEvent;
+};
+
+interface MediaError {
+    readonly code: number;
+    readonly msExtendedCode: number;
+    readonly MEDIA_ERR_ABORTED: number;
+    readonly MEDIA_ERR_DECODE: number;
+    readonly MEDIA_ERR_NETWORK: number;
+    readonly MEDIA_ERR_SRC_NOT_SUPPORTED: number;
+    readonly MS_MEDIA_ERR_ENCRYPTED: number;
+}
+
+declare var MediaError: {
+    prototype: MediaError;
+    new(): MediaError;
+    readonly MEDIA_ERR_ABORTED: number;
+    readonly MEDIA_ERR_DECODE: number;
+    readonly MEDIA_ERR_NETWORK: number;
+    readonly MEDIA_ERR_SRC_NOT_SUPPORTED: number;
+    readonly MS_MEDIA_ERR_ENCRYPTED: number;
+};
+
+interface MediaKeyMessageEvent extends Event {
+    readonly message: ArrayBuffer;
+    readonly messageType: MediaKeyMessageType;
+}
+
+declare var MediaKeyMessageEvent: {
+    prototype: MediaKeyMessageEvent;
+    new(type: string, eventInitDict?: MediaKeyMessageEventInit): MediaKeyMessageEvent;
+};
+
+interface MediaKeys {
+    createSession(sessionType?: MediaKeySessionType): MediaKeySession;
+    setServerCertificate(serverCertificate: any): Promise<void>;
+}
+
+declare var MediaKeys: {
+    prototype: MediaKeys;
+    new(): MediaKeys;
+};
+
+interface MediaKeySession extends EventTarget {
+    readonly closed: Promise<void>;
+    readonly expiration: number;
+    readonly keyStatuses: MediaKeyStatusMap;
+    readonly sessionId: string;
+    close(): Promise<void>;
+    generateRequest(initDataType: string, initData: any): Promise<void>;
+    load(sessionId: string): Promise<boolean>;
+    remove(): Promise<void>;
+    update(response: any): Promise<void>;
+}
+
+declare var MediaKeySession: {
+    prototype: MediaKeySession;
+    new(): MediaKeySession;
+};
+
+interface MediaKeyStatusMap {
+    readonly size: number;
+    forEach(callback: ForEachCallback): void;
+    get(keyId: any): MediaKeyStatus;
+    has(keyId: any): boolean;
+}
+
+declare var MediaKeyStatusMap: {
+    prototype: MediaKeyStatusMap;
+    new(): MediaKeyStatusMap;
+};
+
+interface MediaKeySystemAccess {
+    readonly keySystem: string;
+    createMediaKeys(): Promise<MediaKeys>;
+    getConfiguration(): MediaKeySystemConfiguration;
+}
+
+declare var MediaKeySystemAccess: {
+    prototype: MediaKeySystemAccess;
+    new(): MediaKeySystemAccess;
+};
+
+interface MediaList {
+    readonly length: number;
+    mediaText: string;
+    appendMedium(newMedium: string): void;
+    deleteMedium(oldMedium: string): void;
+    item(index: number): string;
+    toString(): string;
+    [index: number]: string;
+}
+
+declare var MediaList: {
+    prototype: MediaList;
+    new(): MediaList;
+};
+
+interface MediaQueryList {
+    readonly matches: boolean;
+    readonly media: string;
+    addListener(listener: MediaQueryListListener): void;
+    removeListener(listener: MediaQueryListListener): void;
+}
+
+declare var MediaQueryList: {
+    prototype: MediaQueryList;
+    new(): MediaQueryList;
+};
+
+interface MediaSource extends EventTarget {
+    readonly activeSourceBuffers: SourceBufferList;
+    duration: number;
+    readonly readyState: string;
+    readonly sourceBuffers: SourceBufferList;
+    addSourceBuffer(type: string): SourceBuffer;
+    endOfStream(error?: number): void;
+    removeSourceBuffer(sourceBuffer: SourceBuffer): void;
+}
+
+declare var MediaSource: {
+    prototype: MediaSource;
+    new(): MediaSource;
+    isTypeSupported(type: string): boolean;
+};
+
+interface MediaStreamEventMap {
+    "active": Event;
+    "addtrack": MediaStreamTrackEvent;
+    "inactive": Event;
+    "removetrack": MediaStreamTrackEvent;
+}
+
+interface MediaStream extends EventTarget {
+    readonly active: boolean;
+    readonly id: string;
+    onactive: (this: MediaStream, ev: Event) => any;
+    onaddtrack: (this: MediaStream, ev: MediaStreamTrackEvent) => any;
+    oninactive: (this: MediaStream, ev: Event) => any;
+    onremovetrack: (this: MediaStream, ev: MediaStreamTrackEvent) => any;
+    addTrack(track: MediaStreamTrack): void;
+    clone(): MediaStream;
+    getAudioTracks(): MediaStreamTrack[];
+    getTrackById(trackId: string): MediaStreamTrack | null;
+    getTracks(): MediaStreamTrack[];
+    getVideoTracks(): MediaStreamTrack[];
+    removeTrack(track: MediaStreamTrack): void;
+    stop(): void;
+    addEventListener<K extends keyof MediaStreamEventMap>(type: K, listener: (this: MediaStream, ev: MediaStreamEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MediaStream: {
+    prototype: MediaStream;
+    new(streamOrTracks?: MediaStream | MediaStreamTrack[]): MediaStream;
+};
+
+interface MediaStreamAudioSourceNode extends AudioNode {
+}
+
+declare var MediaStreamAudioSourceNode: {
+    prototype: MediaStreamAudioSourceNode;
+    new(): MediaStreamAudioSourceNode;
+};
+
+interface MediaStreamError {
+    readonly constraintName: string | null;
+    readonly message: string | null;
+    readonly name: string;
+}
+
+declare var MediaStreamError: {
+    prototype: MediaStreamError;
+    new(): MediaStreamError;
+};
+
+interface MediaStreamErrorEvent extends Event {
+    readonly error: MediaStreamError | null;
+}
+
+declare var MediaStreamErrorEvent: {
+    prototype: MediaStreamErrorEvent;
+    new(typeArg: string, eventInitDict?: MediaStreamErrorEventInit): MediaStreamErrorEvent;
+};
+
+interface MediaStreamEvent extends Event {
+    readonly stream: MediaStream | null;
+}
+
+declare var MediaStreamEvent: {
+    prototype: MediaStreamEvent;
+    new(type: string, eventInitDict: MediaStreamEventInit): MediaStreamEvent;
+};
+
+interface MediaStreamTrackEventMap {
+    "ended": MediaStreamErrorEvent;
+    "mute": Event;
+    "overconstrained": MediaStreamErrorEvent;
+    "unmute": Event;
+}
+
+interface MediaStreamTrack extends EventTarget {
+    enabled: boolean;
+    readonly id: string;
+    readonly kind: string;
+    readonly label: string;
+    readonly muted: boolean;
+    onended: (this: MediaStreamTrack, ev: MediaStreamErrorEvent) => any;
+    onmute: (this: MediaStreamTrack, ev: Event) => any;
+    onoverconstrained: (this: MediaStreamTrack, ev: MediaStreamErrorEvent) => any;
+    onunmute: (this: MediaStreamTrack, ev: Event) => any;
+    readonly readonly: boolean;
+    readonly readyState: MediaStreamTrackState;
+    readonly remote: boolean;
+    applyConstraints(constraints: MediaTrackConstraints): Promise<void>;
+    clone(): MediaStreamTrack;
+    getCapabilities(): MediaTrackCapabilities;
+    getConstraints(): MediaTrackConstraints;
+    getSettings(): MediaTrackSettings;
+    stop(): void;
+    addEventListener<K extends keyof MediaStreamTrackEventMap>(type: K, listener: (this: MediaStreamTrack, ev: MediaStreamTrackEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MediaStreamTrack: {
+    prototype: MediaStreamTrack;
+    new(): MediaStreamTrack;
+};
+
+interface MediaStreamTrackEvent extends Event {
+    readonly track: MediaStreamTrack;
+}
+
+declare var MediaStreamTrackEvent: {
+    prototype: MediaStreamTrackEvent;
+    new(typeArg: string, eventInitDict?: MediaStreamTrackEventInit): MediaStreamTrackEvent;
+};
+
+interface MessageChannel {
+    readonly port1: MessagePort;
+    readonly port2: MessagePort;
+}
+
+declare var MessageChannel: {
+    prototype: MessageChannel;
+    new(): MessageChannel;
+};
+
+interface MessageEvent extends Event {
+    readonly data: any;
+    readonly origin: string;
+    readonly ports: any;
+    readonly source: Window;
+    initMessageEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, dataArg: any, originArg: string, lastEventIdArg: string, sourceArg: Window): void;
+}
+
+declare var MessageEvent: {
+    prototype: MessageEvent;
+    new(type: string, eventInitDict?: MessageEventInit): MessageEvent;
+};
+
+interface MessagePortEventMap {
+    "message": MessageEvent;
+}
+
+interface MessagePort extends EventTarget {
+    onmessage: (this: MessagePort, ev: MessageEvent) => any;
+    close(): void;
+    postMessage(message?: any, transfer?: any[]): void;
+    start(): void;
+    addEventListener<K extends keyof MessagePortEventMap>(type: K, listener: (this: MessagePort, ev: MessagePortEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MessagePort: {
+    prototype: MessagePort;
+    new(): MessagePort;
+};
+
+interface MimeType {
+    readonly description: string;
+    readonly enabledPlugin: Plugin;
+    readonly suffixes: string;
+    readonly type: string;
+}
+
+declare var MimeType: {
+    prototype: MimeType;
+    new(): MimeType;
+};
+
+interface MimeTypeArray {
+    readonly length: number;
+    item(index: number): Plugin;
+    namedItem(type: string): Plugin;
+    [index: number]: Plugin;
+}
+
+declare var MimeTypeArray: {
+    prototype: MimeTypeArray;
+    new(): MimeTypeArray;
+};
+
+interface MouseEvent extends UIEvent {
+    readonly altKey: boolean;
+    readonly button: number;
+    readonly buttons: number;
+    readonly clientX: number;
+    readonly clientY: number;
+    readonly ctrlKey: boolean;
+    readonly fromElement: Element;
+    readonly layerX: number;
+    readonly layerY: number;
+    readonly metaKey: boolean;
+    readonly movementX: number;
+    readonly movementY: number;
+    readonly offsetX: number;
+    readonly offsetY: number;
+    readonly pageX: number;
+    readonly pageY: number;
+    readonly relatedTarget: EventTarget;
+    readonly screenX: number;
+    readonly screenY: number;
+    readonly shiftKey: boolean;
+    readonly toElement: Element;
+    readonly which: number;
+    readonly x: number;
+    readonly y: number;
+    getModifierState(keyArg: string): boolean;
+    initMouseEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, ctrlKeyArg: boolean, altKeyArg: boolean, shiftKeyArg: boolean, metaKeyArg: boolean, buttonArg: number, relatedTargetArg: EventTarget | null): void;
+}
+
+declare var MouseEvent: {
+    prototype: MouseEvent;
+    new(typeArg: string, eventInitDict?: MouseEventInit): MouseEvent;
+};
+
+interface MSApp {
+    clearTemporaryWebDataAsync(): MSAppAsyncOperation;
+    createBlobFromRandomAccessStream(type: string, seeker: any): Blob;
+    createDataPackage(object: any): any;
+    createDataPackageFromSelection(): any;
+    createFileFromStorageFile(storageFile: any): File;
+    createStreamFromInputStream(type: string, inputStream: any): MSStream;
+    execAsyncAtPriority(asynchronousCallback: MSExecAtPriorityFunctionCallback, priority: string, ...args: any[]): void;
+    execAtPriority(synchronousCallback: MSExecAtPriorityFunctionCallback, priority: string, ...args: any[]): any;
+    getCurrentPriority(): string;
+    getHtmlPrintDocumentSourceAsync(htmlDoc: any): Promise<any>;
+    getViewId(view: any): any;
+    isTaskScheduledAtPriorityOrHigher(priority: string): boolean;
+    pageHandlesAllApplicationActivations(enabled: boolean): void;
+    suppressSubdownloadCredentialPrompts(suppress: boolean): void;
+    terminateApp(exceptionObject: any): void;
+    readonly CURRENT: string;
+    readonly HIGH: string;
+    readonly IDLE: string;
+    readonly NORMAL: string;
+}
+declare var MSApp: MSApp;
+
+interface MSAppAsyncOperationEventMap {
+    "complete": Event;
+    "error": Event;
+}
+
+interface MSAppAsyncOperation extends EventTarget {
+    readonly error: DOMError;
+    oncomplete: (this: MSAppAsyncOperation, ev: Event) => any;
+    onerror: (this: MSAppAsyncOperation, ev: Event) => any;
+    readonly readyState: number;
+    readonly result: any;
+    start(): void;
+    readonly COMPLETED: number;
+    readonly ERROR: number;
+    readonly STARTED: number;
+    addEventListener<K extends keyof MSAppAsyncOperationEventMap>(type: K, listener: (this: MSAppAsyncOperation, ev: MSAppAsyncOperationEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MSAppAsyncOperation: {
+    prototype: MSAppAsyncOperation;
+    new(): MSAppAsyncOperation;
+    readonly COMPLETED: number;
+    readonly ERROR: number;
+    readonly STARTED: number;
+};
+
+interface MSAssertion {
+    readonly id: string;
+    readonly type: MSCredentialType;
+}
+
+declare var MSAssertion: {
+    prototype: MSAssertion;
+    new(): MSAssertion;
+};
+
+interface MSBlobBuilder {
+    append(data: any, endings?: string): void;
+    getBlob(contentType?: string): Blob;
+}
+
+declare var MSBlobBuilder: {
+    prototype: MSBlobBuilder;
+    new(): MSBlobBuilder;
+};
+
+interface MSCredentials {
+    getAssertion(challenge: string, filter?: MSCredentialFilter, params?: MSSignatureParameters): Promise<MSAssertion>;
+    makeCredential(accountInfo: MSAccountInfo, params: MSCredentialParameters[], challenge?: string): Promise<MSAssertion>;
+}
+
+declare var MSCredentials: {
+    prototype: MSCredentials;
+    new(): MSCredentials;
+};
+
+interface MSFIDOCredentialAssertion extends MSAssertion {
+    readonly algorithm: string | Algorithm;
+    readonly attestation: any;
+    readonly publicKey: string;
+    readonly transportHints: MSTransportType[];
+}
+
+declare var MSFIDOCredentialAssertion: {
+    prototype: MSFIDOCredentialAssertion;
+    new(): MSFIDOCredentialAssertion;
+};
+
+interface MSFIDOSignature {
+    readonly authnrData: string;
+    readonly clientData: string;
+    readonly signature: string;
+}
+
+declare var MSFIDOSignature: {
+    prototype: MSFIDOSignature;
+    new(): MSFIDOSignature;
+};
+
+interface MSFIDOSignatureAssertion extends MSAssertion {
+    readonly signature: MSFIDOSignature;
+}
+
+declare var MSFIDOSignatureAssertion: {
+    prototype: MSFIDOSignatureAssertion;
+    new(): MSFIDOSignatureAssertion;
+};
+
+interface MSGesture {
+    target: Element;
+    addPointer(pointerId: number): void;
+    stop(): void;
+}
+
+declare var MSGesture: {
+    prototype: MSGesture;
+    new(): MSGesture;
+};
+
+interface MSGestureEvent extends UIEvent {
+    readonly clientX: number;
+    readonly clientY: number;
+    readonly expansion: number;
+    readonly gestureObject: any;
+    readonly hwTimestamp: number;
+    readonly offsetX: number;
+    readonly offsetY: number;
+    readonly rotation: number;
+    readonly scale: number;
+    readonly screenX: number;
+    readonly screenY: number;
+    readonly translationX: number;
+    readonly translationY: number;
+    readonly velocityAngular: number;
+    readonly velocityExpansion: number;
+    readonly velocityX: number;
+    readonly velocityY: number;
+    initGestureEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, offsetXArg: number, offsetYArg: number, translationXArg: number, translationYArg: number, scaleArg: number, expansionArg: number, rotationArg: number, velocityXArg: number, velocityYArg: number, velocityExpansionArg: number, velocityAngularArg: number, hwTimestampArg: number): void;
+    readonly MSGESTURE_FLAG_BEGIN: number;
+    readonly MSGESTURE_FLAG_CANCEL: number;
+    readonly MSGESTURE_FLAG_END: number;
+    readonly MSGESTURE_FLAG_INERTIA: number;
+    readonly MSGESTURE_FLAG_NONE: number;
+}
+
+declare var MSGestureEvent: {
+    prototype: MSGestureEvent;
+    new(): MSGestureEvent;
+    readonly MSGESTURE_FLAG_BEGIN: number;
+    readonly MSGESTURE_FLAG_CANCEL: number;
+    readonly MSGESTURE_FLAG_END: number;
+    readonly MSGESTURE_FLAG_INERTIA: number;
+    readonly MSGESTURE_FLAG_NONE: number;
+};
+
+interface MSGraphicsTrust {
+    readonly constrictionActive: boolean;
+    readonly status: string;
+}
+
+declare var MSGraphicsTrust: {
+    prototype: MSGraphicsTrust;
+    new(): MSGraphicsTrust;
+};
+
+interface MSHTMLWebViewElement extends HTMLElement {
+    readonly canGoBack: boolean;
+    readonly canGoForward: boolean;
+    readonly containsFullScreenElement: boolean;
+    readonly documentTitle: string;
+    height: number;
+    readonly settings: MSWebViewSettings;
+    src: string;
+    width: number;
+    addWebAllowedObject(name: string, applicationObject: any): void;
+    buildLocalStreamUri(contentIdentifier: string, relativePath: string): string;
+    capturePreviewToBlobAsync(): MSWebViewAsyncOperation;
+    captureSelectedContentToDataPackageAsync(): MSWebViewAsyncOperation;
+    getDeferredPermissionRequestById(id: number): DeferredPermissionRequest;
+    getDeferredPermissionRequests(): DeferredPermissionRequest[];
+    goBack(): void;
+    goForward(): void;
+    invokeScriptAsync(scriptName: string, ...args: any[]): MSWebViewAsyncOperation;
+    navigate(uri: string): void;
+    navigateFocus(navigationReason: NavigationReason, origin: FocusNavigationOrigin): void;
+    navigateToLocalStreamUri(source: string, streamResolver: any): void;
+    navigateToString(contents: string): void;
+    navigateWithHttpRequestMessage(requestMessage: any): void;
+    refresh(): void;
+    stop(): void;
+    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: MSHTMLWebViewElement, ev: HTMLElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MSHTMLWebViewElement: {
+    prototype: MSHTMLWebViewElement;
+    new(): MSHTMLWebViewElement;
+};
+
+interface MSInputMethodContextEventMap {
+    "MSCandidateWindowHide": Event;
+    "MSCandidateWindowShow": Event;
+    "MSCandidateWindowUpdate": Event;
+}
+
+interface MSInputMethodContext extends EventTarget {
+    readonly compositionEndOffset: number;
+    readonly compositionStartOffset: number;
+    oncandidatewindowhide: (this: MSInputMethodContext, ev: Event) => any;
+    oncandidatewindowshow: (this: MSInputMethodContext, ev: Event) => any;
+    oncandidatewindowupdate: (this: MSInputMethodContext, ev: Event) => any;
+    readonly target: HTMLElement;
+    getCandidateWindowClientRect(): ClientRect;
+    getCompositionAlternatives(): string[];
+    hasComposition(): boolean;
+    isCandidateWindowVisible(): boolean;
+    addEventListener<K extends keyof MSInputMethodContextEventMap>(type: K, listener: (this: MSInputMethodContext, ev: MSInputMethodContextEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MSInputMethodContext: {
+    prototype: MSInputMethodContext;
+    new(): MSInputMethodContext;
+};
+
+interface MSManipulationEvent extends UIEvent {
+    readonly currentState: number;
+    readonly inertiaDestinationX: number;
+    readonly inertiaDestinationY: number;
+    readonly lastState: number;
+    initMSManipulationEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, lastState: number, currentState: number): void;
+    readonly MS_MANIPULATION_STATE_ACTIVE: number;
+    readonly MS_MANIPULATION_STATE_CANCELLED: number;
+    readonly MS_MANIPULATION_STATE_COMMITTED: number;
+    readonly MS_MANIPULATION_STATE_DRAGGING: number;
+    readonly MS_MANIPULATION_STATE_INERTIA: number;
+    readonly MS_MANIPULATION_STATE_PRESELECT: number;
+    readonly MS_MANIPULATION_STATE_SELECTING: number;
+    readonly MS_MANIPULATION_STATE_STOPPED: number;
+}
+
+declare var MSManipulationEvent: {
+    prototype: MSManipulationEvent;
+    new(): MSManipulationEvent;
+    readonly MS_MANIPULATION_STATE_ACTIVE: number;
+    readonly MS_MANIPULATION_STATE_CANCELLED: number;
+    readonly MS_MANIPULATION_STATE_COMMITTED: number;
+    readonly MS_MANIPULATION_STATE_DRAGGING: number;
+    readonly MS_MANIPULATION_STATE_INERTIA: number;
+    readonly MS_MANIPULATION_STATE_PRESELECT: number;
+    readonly MS_MANIPULATION_STATE_SELECTING: number;
+    readonly MS_MANIPULATION_STATE_STOPPED: number;
+};
+
+interface MSMediaKeyError {
+    readonly code: number;
+    readonly systemCode: number;
+    readonly MS_MEDIA_KEYERR_CLIENT: number;
+    readonly MS_MEDIA_KEYERR_DOMAIN: number;
+    readonly MS_MEDIA_KEYERR_HARDWARECHANGE: number;
+    readonly MS_MEDIA_KEYERR_OUTPUT: number;
+    readonly MS_MEDIA_KEYERR_SERVICE: number;
+    readonly MS_MEDIA_KEYERR_UNKNOWN: number;
+}
+
+declare var MSMediaKeyError: {
+    prototype: MSMediaKeyError;
+    new(): MSMediaKeyError;
+    readonly MS_MEDIA_KEYERR_CLIENT: number;
+    readonly MS_MEDIA_KEYERR_DOMAIN: number;
+    readonly MS_MEDIA_KEYERR_HARDWARECHANGE: number;
+    readonly MS_MEDIA_KEYERR_OUTPUT: number;
+    readonly MS_MEDIA_KEYERR_SERVICE: number;
+    readonly MS_MEDIA_KEYERR_UNKNOWN: number;
+};
+
+interface MSMediaKeyMessageEvent extends Event {
+    readonly destinationURL: string | null;
+    readonly message: Uint8Array;
+}
+
+declare var MSMediaKeyMessageEvent: {
+    prototype: MSMediaKeyMessageEvent;
+    new(): MSMediaKeyMessageEvent;
+};
+
+interface MSMediaKeyNeededEvent extends Event {
+    readonly initData: Uint8Array | null;
+}
+
+declare var MSMediaKeyNeededEvent: {
+    prototype: MSMediaKeyNeededEvent;
+    new(): MSMediaKeyNeededEvent;
+};
+
+interface MSMediaKeys {
+    readonly keySystem: string;
+    createSession(type: string, initData: Uint8Array, cdmData?: Uint8Array): MSMediaKeySession;
+}
+
+declare var MSMediaKeys: {
+    prototype: MSMediaKeys;
+    new(keySystem: string): MSMediaKeys;
+    isTypeSupported(keySystem: string, type?: string): boolean;
+    isTypeSupportedWithFeatures(keySystem: string, type?: string): string;
+};
+
+interface MSMediaKeySession extends EventTarget {
+    readonly error: MSMediaKeyError | null;
+    readonly keySystem: string;
+    readonly sessionId: string;
+    close(): void;
+    update(key: Uint8Array): void;
+}
+
+declare var MSMediaKeySession: {
+    prototype: MSMediaKeySession;
+    new(): MSMediaKeySession;
+};
+
+interface MSPointerEvent extends MouseEvent {
+    readonly currentPoint: any;
+    readonly height: number;
+    readonly hwTimestamp: number;
+    readonly intermediatePoints: any;
+    readonly isPrimary: boolean;
+    readonly pointerId: number;
+    readonly pointerType: any;
+    readonly pressure: number;
+    readonly rotation: number;
+    readonly tiltX: number;
+    readonly tiltY: number;
+    readonly width: number;
+    getCurrentPoint(element: Element): void;
+    getIntermediatePoints(element: Element): void;
+    initPointerEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, ctrlKeyArg: boolean, altKeyArg: boolean, shiftKeyArg: boolean, metaKeyArg: boolean, buttonArg: number, relatedTargetArg: EventTarget, offsetXArg: number, offsetYArg: number, widthArg: number, heightArg: number, pressure: number, rotation: number, tiltX: number, tiltY: number, pointerIdArg: number, pointerType: any, hwTimestampArg: number, isPrimary: boolean): void;
+}
+
+declare var MSPointerEvent: {
+    prototype: MSPointerEvent;
+    new(typeArg: string, eventInitDict?: PointerEventInit): MSPointerEvent;
+};
+
+interface MSRangeCollection {
+    readonly length: number;
+    item(index: number): Range;
+    [index: number]: Range;
+}
+
+declare var MSRangeCollection: {
+    prototype: MSRangeCollection;
+    new(): MSRangeCollection;
+};
+
+interface MSSiteModeEvent extends Event {
+    readonly actionURL: string;
+    readonly buttonID: number;
+}
+
+declare var MSSiteModeEvent: {
+    prototype: MSSiteModeEvent;
+    new(): MSSiteModeEvent;
+};
+
+interface MSStream {
+    readonly type: string;
+    msClose(): void;
+    msDetachStream(): any;
+}
+
+declare var MSStream: {
+    prototype: MSStream;
+    new(): MSStream;
+};
+
+interface MSStreamReader extends EventTarget, MSBaseReader {
+    readonly error: DOMError;
+    readAsArrayBuffer(stream: MSStream, size?: number): void;
+    readAsBinaryString(stream: MSStream, size?: number): void;
+    readAsBlob(stream: MSStream, size?: number): void;
+    readAsDataURL(stream: MSStream, size?: number): void;
+    readAsText(stream: MSStream, encoding?: string, size?: number): void;
+    addEventListener<K extends keyof MSBaseReaderEventMap>(type: K, listener: (this: MSStreamReader, ev: MSBaseReaderEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MSStreamReader: {
+    prototype: MSStreamReader;
+    new(): MSStreamReader;
+};
+
+interface MSWebViewAsyncOperationEventMap {
+    "complete": Event;
+    "error": Event;
+}
+
+interface MSWebViewAsyncOperation extends EventTarget {
+    readonly error: DOMError;
+    oncomplete: (this: MSWebViewAsyncOperation, ev: Event) => any;
+    onerror: (this: MSWebViewAsyncOperation, ev: Event) => any;
+    readonly readyState: number;
+    readonly result: any;
+    readonly target: MSHTMLWebViewElement;
+    readonly type: number;
+    start(): void;
+    readonly COMPLETED: number;
+    readonly ERROR: number;
+    readonly STARTED: number;
+    readonly TYPE_CAPTURE_PREVIEW_TO_RANDOM_ACCESS_STREAM: number;
+    readonly TYPE_CREATE_DATA_PACKAGE_FROM_SELECTION: number;
+    readonly TYPE_INVOKE_SCRIPT: number;
+    addEventListener<K extends keyof MSWebViewAsyncOperationEventMap>(type: K, listener: (this: MSWebViewAsyncOperation, ev: MSWebViewAsyncOperationEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MSWebViewAsyncOperation: {
+    prototype: MSWebViewAsyncOperation;
+    new(): MSWebViewAsyncOperation;
+    readonly COMPLETED: number;
+    readonly ERROR: number;
+    readonly STARTED: number;
+    readonly TYPE_CAPTURE_PREVIEW_TO_RANDOM_ACCESS_STREAM: number;
+    readonly TYPE_CREATE_DATA_PACKAGE_FROM_SELECTION: number;
+    readonly TYPE_INVOKE_SCRIPT: number;
+};
+
+interface MSWebViewSettings {
+    isIndexedDBEnabled: boolean;
+    isJavaScriptEnabled: boolean;
+}
+
+declare var MSWebViewSettings: {
+    prototype: MSWebViewSettings;
+    new(): MSWebViewSettings;
+};
+
+interface MutationEvent extends Event {
+    readonly attrChange: number;
+    readonly attrName: string;
+    readonly newValue: string;
+    readonly prevValue: string;
+    readonly relatedNode: Node;
+    initMutationEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, relatedNodeArg: Node, prevValueArg: string, newValueArg: string, attrNameArg: string, attrChangeArg: number): void;
+    readonly ADDITION: number;
+    readonly MODIFICATION: number;
+    readonly REMOVAL: number;
+}
+
+declare var MutationEvent: {
+    prototype: MutationEvent;
+    new(): MutationEvent;
+    readonly ADDITION: number;
+    readonly MODIFICATION: number;
+    readonly REMOVAL: number;
+};
+
+interface MutationObserver {
+    disconnect(): void;
+    observe(target: Node, options: MutationObserverInit): void;
+    takeRecords(): MutationRecord[];
+}
+
+declare var MutationObserver: {
+    prototype: MutationObserver;
+    new(callback: MutationCallback): MutationObserver;
+};
+
+interface MutationRecord {
+    readonly addedNodes: NodeList;
+    readonly attributeName: string | null;
+    readonly attributeNamespace: string | null;
+    readonly nextSibling: Node | null;
+    readonly oldValue: string | null;
+    readonly previousSibling: Node | null;
+    readonly removedNodes: NodeList;
+    readonly target: Node;
+    readonly type: string;
+}
+
+declare var MutationRecord: {
+    prototype: MutationRecord;
+    new(): MutationRecord;
+};
+
+interface NamedNodeMap {
+    readonly length: number;
+    getNamedItem(name: string): Attr;
+    getNamedItemNS(namespaceURI: string | null, localName: string | null): Attr;
+    item(index: number): Attr;
+    removeNamedItem(name: string): Attr;
+    removeNamedItemNS(namespaceURI: string | null, localName: string | null): Attr;
+    setNamedItem(arg: Attr): Attr;
+    setNamedItemNS(arg: Attr): Attr;
+    [index: number]: Attr;
+}
+
+declare var NamedNodeMap: {
+    prototype: NamedNodeMap;
+    new(): NamedNodeMap;
+};
+
+interface NavigationCompletedEvent extends NavigationEvent {
+    readonly isSuccess: boolean;
+    readonly webErrorStatus: number;
+}
+
+declare var NavigationCompletedEvent: {
+    prototype: NavigationCompletedEvent;
+    new(): NavigationCompletedEvent;
+};
+
+interface NavigationEvent extends Event {
+    readonly uri: string;
+}
+
+declare var NavigationEvent: {
+    prototype: NavigationEvent;
+    new(): NavigationEvent;
+};
+
+interface NavigationEventWithReferrer extends NavigationEvent {
+    readonly referer: string;
+}
+
+declare var NavigationEventWithReferrer: {
+    prototype: NavigationEventWithReferrer;
+    new(): NavigationEventWithReferrer;
+};
+
+interface Navigator extends Object, NavigatorID, NavigatorOnLine, NavigatorContentUtils, NavigatorStorageUtils, NavigatorGeolocation, MSNavigatorDoNotTrack, MSFileSaver, NavigatorBeacon, NavigatorConcurrentHardware, NavigatorUserMedia {
+    readonly authentication: WebAuthentication;
+    readonly cookieEnabled: boolean;
+    gamepadInputEmulation: GamepadInputEmulationType;
+    readonly language: string;
+    readonly maxTouchPoints: number;
+    readonly mimeTypes: MimeTypeArray;
+    readonly msManipulationViewsEnabled: boolean;
+    readonly msMaxTouchPoints: number;
+    readonly msPointerEnabled: boolean;
+    readonly plugins: PluginArray;
+    readonly pointerEnabled: boolean;
+    readonly serviceWorker: ServiceWorkerContainer;
+    readonly webdriver: boolean;
+    readonly hardwareConcurrency: number;
+    readonly languages: string[];
+    getGamepads(): Gamepad[];
+    javaEnabled(): boolean;
+    msLaunchUri(uri: string, successCallback?: MSLaunchUriCallback, noHandlerCallback?: MSLaunchUriCallback): void;
+    requestMediaKeySystemAccess(keySystem: string, supportedConfigurations: MediaKeySystemConfiguration[]): Promise<MediaKeySystemAccess>;
+    vibrate(pattern: number | number[]): boolean;
+}
+
+declare var Navigator: {
+    prototype: Navigator;
+    new(): Navigator;
+};
+
+interface Node extends EventTarget {
+    readonly attributes: NamedNodeMap;
+    readonly baseURI: string | null;
+    readonly childNodes: NodeList;
+    readonly firstChild: Node | null;
+    readonly lastChild: Node | null;
+    readonly localName: string | null;
+    readonly namespaceURI: string | null;
+    readonly nextSibling: Node | null;
+    readonly nodeName: string;
+    readonly nodeType: number;
+    nodeValue: string | null;
+    readonly ownerDocument: Document;
+    readonly parentElement: HTMLElement | null;
+    readonly parentNode: Node | null;
+    readonly previousSibling: Node | null;
+    textContent: string | null;
+    appendChild<T extends Node>(newChild: T): T;
+    cloneNode(deep?: boolean): Node;
+    compareDocumentPosition(other: Node): number;
+    contains(child: Node): boolean;
+    hasAttributes(): boolean;
+    hasChildNodes(): boolean;
+    insertBefore<T extends Node>(newChild: T, refChild: Node | null): T;
+    isDefaultNamespace(namespaceURI: string | null): boolean;
+    isEqualNode(arg: Node): boolean;
+    isSameNode(other: Node): boolean;
+    lookupNamespaceURI(prefix: string | null): string | null;
+    lookupPrefix(namespaceURI: string | null): string | null;
+    normalize(): void;
+    removeChild<T extends Node>(oldChild: T): T;
+    replaceChild<T extends Node>(newChild: Node, oldChild: T): T;
+    readonly ATTRIBUTE_NODE: number;
+    readonly CDATA_SECTION_NODE: number;
+    readonly COMMENT_NODE: number;
+    readonly DOCUMENT_FRAGMENT_NODE: number;
+    readonly DOCUMENT_NODE: number;
+    readonly DOCUMENT_POSITION_CONTAINED_BY: number;
+    readonly DOCUMENT_POSITION_CONTAINS: number;
+    readonly DOCUMENT_POSITION_DISCONNECTED: number;
+    readonly DOCUMENT_POSITION_FOLLOWING: number;
+    readonly DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC: number;
+    readonly DOCUMENT_POSITION_PRECEDING: number;
+    readonly DOCUMENT_TYPE_NODE: number;
+    readonly ELEMENT_NODE: number;
+    readonly ENTITY_NODE: number;
+    readonly ENTITY_REFERENCE_NODE: number;
+    readonly NOTATION_NODE: number;
+    readonly PROCESSING_INSTRUCTION_NODE: number;
+    readonly TEXT_NODE: number;
+}
+
+declare var Node: {
+    prototype: Node;
+    new(): Node;
+    readonly ATTRIBUTE_NODE: number;
+    readonly CDATA_SECTION_NODE: number;
+    readonly COMMENT_NODE: number;
+    readonly DOCUMENT_FRAGMENT_NODE: number;
+    readonly DOCUMENT_NODE: number;
+    readonly DOCUMENT_POSITION_CONTAINED_BY: number;
+    readonly DOCUMENT_POSITION_CONTAINS: number;
+    readonly DOCUMENT_POSITION_DISCONNECTED: number;
+    readonly DOCUMENT_POSITION_FOLLOWING: number;
+    readonly DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC: number;
+    readonly DOCUMENT_POSITION_PRECEDING: number;
+    readonly DOCUMENT_TYPE_NODE: number;
+    readonly ELEMENT_NODE: number;
+    readonly ENTITY_NODE: number;
+    readonly ENTITY_REFERENCE_NODE: number;
+    readonly NOTATION_NODE: number;
+    readonly PROCESSING_INSTRUCTION_NODE: number;
+    readonly TEXT_NODE: number;
+};
+
+interface NodeFilter {
+    acceptNode(n: Node): number;
+}
+
+declare var NodeFilter: {
+    readonly FILTER_ACCEPT: number;
+    readonly FILTER_REJECT: number;
+    readonly FILTER_SKIP: number;
+    readonly SHOW_ALL: number;
+    readonly SHOW_ATTRIBUTE: number;
+    readonly SHOW_CDATA_SECTION: number;
+    readonly SHOW_COMMENT: number;
+    readonly SHOW_DOCUMENT: number;
+    readonly SHOW_DOCUMENT_FRAGMENT: number;
+    readonly SHOW_DOCUMENT_TYPE: number;
+    readonly SHOW_ELEMENT: number;
+    readonly SHOW_ENTITY: number;
+    readonly SHOW_ENTITY_REFERENCE: number;
+    readonly SHOW_NOTATION: number;
+    readonly SHOW_PROCESSING_INSTRUCTION: number;
+    readonly SHOW_TEXT: number;
+};
+
+interface NodeIterator {
+    readonly expandEntityReferences: boolean;
+    readonly filter: NodeFilter;
+    readonly root: Node;
+    readonly whatToShow: number;
+    detach(): void;
+    nextNode(): Node;
+    previousNode(): Node;
+}
+
+declare var NodeIterator: {
+    prototype: NodeIterator;
+    new(): NodeIterator;
+};
+
+interface NodeList {
+    readonly length: number;
+    item(index: number): Node;
+    [index: number]: Node;
+}
+
+declare var NodeList: {
+    prototype: NodeList;
+    new(): NodeList;
+};
+
+interface NotificationEventMap {
+    "click": Event;
+    "close": Event;
+    "error": Event;
+    "show": Event;
+}
+
+interface Notification extends EventTarget {
+    readonly body: string;
+    readonly dir: NotificationDirection;
+    readonly icon: string;
+    readonly lang: string;
+    onclick: (this: Notification, ev: Event) => any;
+    onclose: (this: Notification, ev: Event) => any;
+    onerror: (this: Notification, ev: Event) => any;
+    onshow: (this: Notification, ev: Event) => any;
+    readonly permission: NotificationPermission;
+    readonly tag: string;
+    readonly title: string;
+    close(): void;
+    addEventListener<K extends keyof NotificationEventMap>(type: K, listener: (this: Notification, ev: NotificationEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var Notification: {
+    prototype: Notification;
+    new(title: string, options?: NotificationOptions): Notification;
+    requestPermission(callback?: NotificationPermissionCallback): Promise<NotificationPermission>;
+};
+
+interface OES_element_index_uint {
+}
+
+declare var OES_element_index_uint: {
+    prototype: OES_element_index_uint;
+    new(): OES_element_index_uint;
+};
+
+interface OES_standard_derivatives {
+    readonly FRAGMENT_SHADER_DERIVATIVE_HINT_OES: number;
+}
+
+declare var OES_standard_derivatives: {
+    prototype: OES_standard_derivatives;
+    new(): OES_standard_derivatives;
+    readonly FRAGMENT_SHADER_DERIVATIVE_HINT_OES: number;
+};
+
+interface OES_texture_float {
+}
+
+declare var OES_texture_float: {
+    prototype: OES_texture_float;
+    new(): OES_texture_float;
+};
+
+interface OES_texture_float_linear {
+}
+
+declare var OES_texture_float_linear: {
+    prototype: OES_texture_float_linear;
+    new(): OES_texture_float_linear;
+};
+
+interface OES_texture_half_float {
+    readonly HALF_FLOAT_OES: number;
+}
+
+declare var OES_texture_half_float: {
+    prototype: OES_texture_half_float;
+    new(): OES_texture_half_float;
+    readonly HALF_FLOAT_OES: number;
+};
+
+interface OES_texture_half_float_linear {
+}
+
+declare var OES_texture_half_float_linear: {
+    prototype: OES_texture_half_float_linear;
+    new(): OES_texture_half_float_linear;
+};
+
+interface OfflineAudioCompletionEvent extends Event {
+    readonly renderedBuffer: AudioBuffer;
+}
+
+declare var OfflineAudioCompletionEvent: {
+    prototype: OfflineAudioCompletionEvent;
+    new(): OfflineAudioCompletionEvent;
+};
+
+interface OfflineAudioContextEventMap extends AudioContextEventMap {
+    "complete": OfflineAudioCompletionEvent;
+}
+
+interface OfflineAudioContext extends AudioContextBase {
+    readonly length: number;
+    oncomplete: (this: OfflineAudioContext, ev: OfflineAudioCompletionEvent) => any;
+    startRendering(): Promise<AudioBuffer>;
+    suspend(suspendTime: number): Promise<void>;
+    addEventListener<K extends keyof OfflineAudioContextEventMap>(type: K, listener: (this: OfflineAudioContext, ev: OfflineAudioContextEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var OfflineAudioContext: {
+    prototype: OfflineAudioContext;
+    new(numberOfChannels: number, length: number, sampleRate: number): OfflineAudioContext;
+};
+
+interface OscillatorNodeEventMap {
+    "ended": MediaStreamErrorEvent;
+}
+
+interface OscillatorNode extends AudioNode {
+    readonly detune: AudioParam;
+    readonly frequency: AudioParam;
+    onended: (this: OscillatorNode, ev: MediaStreamErrorEvent) => any;
+    type: OscillatorType;
+    setPeriodicWave(periodicWave: PeriodicWave): void;
+    start(when?: number): void;
+    stop(when?: number): void;
+    addEventListener<K extends keyof OscillatorNodeEventMap>(type: K, listener: (this: OscillatorNode, ev: OscillatorNodeEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var OscillatorNode: {
+    prototype: OscillatorNode;
+    new(): OscillatorNode;
+};
+
+interface OverflowEvent extends UIEvent {
+    readonly horizontalOverflow: boolean;
+    readonly orient: number;
+    readonly verticalOverflow: boolean;
+    readonly BOTH: number;
+    readonly HORIZONTAL: number;
+    readonly VERTICAL: number;
+}
+
+declare var OverflowEvent: {
+    prototype: OverflowEvent;
+    new(): OverflowEvent;
+    readonly BOTH: number;
+    readonly HORIZONTAL: number;
+    readonly VERTICAL: number;
+};
+
+interface PageTransitionEvent extends Event {
+    readonly persisted: boolean;
+}
+
+declare var PageTransitionEvent: {
+    prototype: PageTransitionEvent;
+    new(): PageTransitionEvent;
+};
+
+interface PannerNode extends AudioNode {
+    coneInnerAngle: number;
+    coneOuterAngle: number;
+    coneOuterGain: number;
+    distanceModel: DistanceModelType;
+    maxDistance: number;
+    panningModel: PanningModelType;
+    refDistance: number;
+    rolloffFactor: number;
+    setOrientation(x: number, y: number, z: number): void;
+    setPosition(x: number, y: number, z: number): void;
+    setVelocity(x: number, y: number, z: number): void;
+}
+
+declare var PannerNode: {
+    prototype: PannerNode;
+    new(): PannerNode;
+};
+
+interface Path2D extends Object, CanvasPathMethods {
+}
+
+declare var Path2D: {
+    prototype: Path2D;
+    new(path?: Path2D): Path2D;
+};
+
+interface PaymentAddress {
+    readonly addressLine: string[];
+    readonly city: string;
+    readonly country: string;
+    readonly dependentLocality: string;
+    readonly languageCode: string;
+    readonly organization: string;
+    readonly phone: string;
+    readonly postalCode: string;
+    readonly recipient: string;
+    readonly region: string;
+    readonly sortingCode: string;
+    toJSON(): any;
+}
+
+declare var PaymentAddress: {
+    prototype: PaymentAddress;
+    new(): PaymentAddress;
+};
+
+interface PaymentRequestEventMap {
+    "shippingaddresschange": Event;
+    "shippingoptionchange": Event;
+}
+
+interface PaymentRequest extends EventTarget {
+    onshippingaddresschange: (this: PaymentRequest, ev: Event) => any;
+    onshippingoptionchange: (this: PaymentRequest, ev: Event) => any;
+    readonly shippingAddress: PaymentAddress | null;
+    readonly shippingOption: string | null;
+    readonly shippingType: PaymentShippingType | null;
+    abort(): Promise<void>;
+    show(): Promise<PaymentResponse>;
+    addEventListener<K extends keyof PaymentRequestEventMap>(type: K, listener: (this: PaymentRequest, ev: PaymentRequestEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var PaymentRequest: {
+    prototype: PaymentRequest;
+    new(methodData: PaymentMethodData[], details: PaymentDetails, options?: PaymentOptions): PaymentRequest;
+};
+
+interface PaymentRequestUpdateEvent extends Event {
+    updateWith(d: Promise<PaymentDetails>): void;
+}
+
+declare var PaymentRequestUpdateEvent: {
+    prototype: PaymentRequestUpdateEvent;
+    new(type: string, eventInitDict?: PaymentRequestUpdateEventInit): PaymentRequestUpdateEvent;
+};
+
+interface PaymentResponse {
+    readonly details: any;
+    readonly methodName: string;
+    readonly payerEmail: string | null;
+    readonly payerName: string | null;
+    readonly payerPhone: string | null;
+    readonly shippingAddress: PaymentAddress | null;
+    readonly shippingOption: string | null;
+    complete(result?: PaymentComplete): Promise<void>;
+    toJSON(): any;
+}
+
+declare var PaymentResponse: {
+    prototype: PaymentResponse;
+    new(): PaymentResponse;
+};
+
+interface Performance {
+    readonly navigation: PerformanceNavigation;
+    readonly timing: PerformanceTiming;
+    clearMarks(markName?: string): void;
+    clearMeasures(measureName?: string): void;
+    clearResourceTimings(): void;
+    getEntries(): any;
+    getEntriesByName(name: string, entryType?: string): any;
+    getEntriesByType(entryType: string): any;
+    getMarks(markName?: string): any;
+    getMeasures(measureName?: string): any;
+    mark(markName: string): void;
+    measure(measureName: string, startMarkName?: string, endMarkName?: string): void;
+    now(): number;
+    setResourceTimingBufferSize(maxSize: number): void;
+    toJSON(): any;
+}
+
+declare var Performance: {
+    prototype: Performance;
+    new(): Performance;
+};
+
+interface PerformanceEntry {
+    readonly duration: number;
+    readonly entryType: string;
+    readonly name: string;
+    readonly startTime: number;
+}
+
+declare var PerformanceEntry: {
+    prototype: PerformanceEntry;
+    new(): PerformanceEntry;
+};
+
+interface PerformanceMark extends PerformanceEntry {
+}
+
+declare var PerformanceMark: {
+    prototype: PerformanceMark;
+    new(): PerformanceMark;
+};
+
+interface PerformanceMeasure extends PerformanceEntry {
+}
+
+declare var PerformanceMeasure: {
+    prototype: PerformanceMeasure;
+    new(): PerformanceMeasure;
+};
+
+interface PerformanceNavigation {
+    readonly redirectCount: number;
+    readonly type: number;
+    toJSON(): any;
+    readonly TYPE_BACK_FORWARD: number;
+    readonly TYPE_NAVIGATE: number;
+    readonly TYPE_RELOAD: number;
+    readonly TYPE_RESERVED: number;
+}
+
+declare var PerformanceNavigation: {
+    prototype: PerformanceNavigation;
+    new(): PerformanceNavigation;
+    readonly TYPE_BACK_FORWARD: number;
+    readonly TYPE_NAVIGATE: number;
+    readonly TYPE_RELOAD: number;
+    readonly TYPE_RESERVED: number;
+};
+
+interface PerformanceNavigationTiming extends PerformanceEntry {
+    readonly connectEnd: number;
+    readonly connectStart: number;
+    readonly domainLookupEnd: number;
+    readonly domainLookupStart: number;
+    readonly domComplete: number;
+    readonly domContentLoadedEventEnd: number;
+    readonly domContentLoadedEventStart: number;
+    readonly domInteractive: number;
+    readonly domLoading: number;
+    readonly fetchStart: number;
+    readonly loadEventEnd: number;
+    readonly loadEventStart: number;
+    readonly navigationStart: number;
+    readonly redirectCount: number;
+    readonly redirectEnd: number;
+    readonly redirectStart: number;
+    readonly requestStart: number;
+    readonly responseEnd: number;
+    readonly responseStart: number;
+    readonly type: NavigationType;
+    readonly unloadEventEnd: number;
+    readonly unloadEventStart: number;
+}
+
+declare var PerformanceNavigationTiming: {
+    prototype: PerformanceNavigationTiming;
+    new(): PerformanceNavigationTiming;
+};
+
+interface PerformanceResourceTiming extends PerformanceEntry {
+    readonly connectEnd: number;
+    readonly connectStart: number;
+    readonly domainLookupEnd: number;
+    readonly domainLookupStart: number;
+    readonly fetchStart: number;
+    readonly initiatorType: string;
+    readonly redirectEnd: number;
+    readonly redirectStart: number;
+    readonly requestStart: number;
+    readonly responseEnd: number;
+    readonly responseStart: number;
+}
+
+declare var PerformanceResourceTiming: {
+    prototype: PerformanceResourceTiming;
+    new(): PerformanceResourceTiming;
+};
+
+interface PerformanceTiming {
+    readonly connectEnd: number;
+    readonly connectStart: number;
+    readonly domainLookupEnd: number;
+    readonly domainLookupStart: number;
+    readonly domComplete: number;
+    readonly domContentLoadedEventEnd: number;
+    readonly domContentLoadedEventStart: number;
+    readonly domInteractive: number;
+    readonly domLoading: number;
+    readonly fetchStart: number;
+    readonly loadEventEnd: number;
+    readonly loadEventStart: number;
+    readonly msFirstPaint: number;
+    readonly navigationStart: number;
+    readonly redirectEnd: number;
+    readonly redirectStart: number;
+    readonly requestStart: number;
+    readonly responseEnd: number;
+    readonly responseStart: number;
+    readonly unloadEventEnd: number;
+    readonly unloadEventStart: number;
+    readonly secureConnectionStart: number;
+    toJSON(): any;
+}
+
+declare var PerformanceTiming: {
+    prototype: PerformanceTiming;
+    new(): PerformanceTiming;
+};
+
+interface PerfWidgetExternal {
+    readonly activeNetworkRequestCount: number;
+    readonly averageFrameTime: number;
+    readonly averagePaintTime: number;
+    readonly extraInformationEnabled: boolean;
+    readonly independentRenderingEnabled: boolean;
+    readonly irDisablingContentString: string;
+    readonly irStatusAvailable: boolean;
+    readonly maxCpuSpeed: number;
+    readonly paintRequestsPerSecond: number;
+    readonly performanceCounter: number;
+    readonly performanceCounterFrequency: number;
+    addEventListener(eventType: string, callback: Function): void;
+    getMemoryUsage(): number;
+    getProcessCpuUsage(): number;
+    getRecentCpuUsage(last: number | null): any;
+    getRecentFrames(last: number | null): any;
+    getRecentMemoryUsage(last: number | null): any;
+    getRecentPaintRequests(last: number | null): any;
+    removeEventListener(eventType: string, callback: Function): void;
+    repositionWindow(x: number, y: number): void;
+    resizeWindow(width: number, height: number): void;
+}
+
+declare var PerfWidgetExternal: {
+    prototype: PerfWidgetExternal;
+    new(): PerfWidgetExternal;
+};
+
+interface PeriodicWave {
+}
+
+declare var PeriodicWave: {
+    prototype: PeriodicWave;
+    new(): PeriodicWave;
+};
+
+interface PermissionRequest extends DeferredPermissionRequest {
+    readonly state: MSWebViewPermissionState;
+    defer(): void;
+}
+
+declare var PermissionRequest: {
+    prototype: PermissionRequest;
+    new(): PermissionRequest;
+};
+
+interface PermissionRequestedEvent extends Event {
+    readonly permissionRequest: PermissionRequest;
+}
+
+declare var PermissionRequestedEvent: {
+    prototype: PermissionRequestedEvent;
+    new(): PermissionRequestedEvent;
+};
+
+interface Plugin {
+    readonly description: string;
+    readonly filename: string;
+    readonly length: number;
+    readonly name: string;
+    readonly version: string;
+    item(index: number): MimeType;
+    namedItem(type: string): MimeType;
+    [index: number]: MimeType;
+}
+
+declare var Plugin: {
+    prototype: Plugin;
+    new(): Plugin;
+};
+
+interface PluginArray {
+    readonly length: number;
+    item(index: number): Plugin;
+    namedItem(name: string): Plugin;
+    refresh(reload?: boolean): void;
+    [index: number]: Plugin;
+}
+
+declare var PluginArray: {
+    prototype: PluginArray;
+    new(): PluginArray;
+};
+
+interface PointerEvent extends MouseEvent {
+    readonly currentPoint: any;
+    readonly height: number;
+    readonly hwTimestamp: number;
+    readonly intermediatePoints: any;
+    readonly isPrimary: boolean;
+    readonly pointerId: number;
+    readonly pointerType: any;
+    readonly pressure: number;
+    readonly rotation: number;
+    readonly tiltX: number;
+    readonly tiltY: number;
+    readonly width: number;
+    getCurrentPoint(element: Element): void;
+    getIntermediatePoints(element: Element): void;
+    initPointerEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, ctrlKeyArg: boolean, altKeyArg: boolean, shiftKeyArg: boolean, metaKeyArg: boolean, buttonArg: number, relatedTargetArg: EventTarget, offsetXArg: number, offsetYArg: number, widthArg: number, heightArg: number, pressure: number, rotation: number, tiltX: number, tiltY: number, pointerIdArg: number, pointerType: any, hwTimestampArg: number, isPrimary: boolean): void;
+}
+
+declare var PointerEvent: {
+    prototype: PointerEvent;
+    new(typeArg: string, eventInitDict?: PointerEventInit): PointerEvent;
+};
+
+interface PopStateEvent extends Event {
+    readonly state: any;
+    initPopStateEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, stateArg: any): void;
+}
+
+declare var PopStateEvent: {
+    prototype: PopStateEvent;
+    new(typeArg: string, eventInitDict?: PopStateEventInit): PopStateEvent;
+};
+
+interface Position {
+    readonly coords: Coordinates;
+    readonly timestamp: number;
+}
+
+declare var Position: {
+    prototype: Position;
+    new(): Position;
+};
+
+interface PositionError {
+    readonly code: number;
+    readonly message: string;
+    toString(): string;
+    readonly PERMISSION_DENIED: number;
+    readonly POSITION_UNAVAILABLE: number;
+    readonly TIMEOUT: number;
+}
+
+declare var PositionError: {
+    prototype: PositionError;
+    new(): PositionError;
+    readonly PERMISSION_DENIED: number;
+    readonly POSITION_UNAVAILABLE: number;
+    readonly TIMEOUT: number;
+};
+
+interface ProcessingInstruction extends CharacterData {
+    readonly target: string;
+}
+
+declare var ProcessingInstruction: {
+    prototype: ProcessingInstruction;
+    new(): ProcessingInstruction;
+};
+
+interface ProgressEvent extends Event {
+    readonly lengthComputable: boolean;
+    readonly loaded: number;
+    readonly total: number;
+    initProgressEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, lengthComputableArg: boolean, loadedArg: number, totalArg: number): void;
+}
+
+declare var ProgressEvent: {
+    prototype: ProgressEvent;
+    new(type: string, eventInitDict?: ProgressEventInit): ProgressEvent;
+};
+
+interface PushManager {
+    getSubscription(): Promise<PushSubscription>;
+    permissionState(options?: PushSubscriptionOptionsInit): Promise<PushPermissionState>;
+    subscribe(options?: PushSubscriptionOptionsInit): Promise<PushSubscription>;
+}
+
+declare var PushManager: {
+    prototype: PushManager;
+    new(): PushManager;
+};
+
+interface PushSubscription {
+    readonly endpoint: USVString;
+    readonly options: PushSubscriptionOptions;
+    getKey(name: PushEncryptionKeyName): ArrayBuffer | null;
+    toJSON(): any;
+    unsubscribe(): Promise<boolean>;
+}
+
+declare var PushSubscription: {
+    prototype: PushSubscription;
+    new(): PushSubscription;
+};
+
+interface PushSubscriptionOptions {
+    readonly applicationServerKey: ArrayBuffer | null;
+    readonly userVisibleOnly: boolean;
+}
+
+declare var PushSubscriptionOptions: {
+    prototype: PushSubscriptionOptions;
+    new(): PushSubscriptionOptions;
+};
+
+interface Range {
+    readonly collapsed: boolean;
+    readonly commonAncestorContainer: Node;
+    readonly endContainer: Node;
+    readonly endOffset: number;
+    readonly startContainer: Node;
+    readonly startOffset: number;
+    cloneContents(): DocumentFragment;
+    cloneRange(): Range;
+    collapse(toStart: boolean): void;
+    compareBoundaryPoints(how: number, sourceRange: Range): number;
+    createContextualFragment(fragment: string): DocumentFragment;
+    deleteContents(): void;
+    detach(): void;
+    expand(Unit: ExpandGranularity): boolean;
+    extractContents(): DocumentFragment;
+    getBoundingClientRect(): ClientRect;
+    getClientRects(): ClientRectList;
+    insertNode(newNode: Node): void;
+    selectNode(refNode: Node): void;
+    selectNodeContents(refNode: Node): void;
+    setEnd(refNode: Node, offset: number): void;
+    setEndAfter(refNode: Node): void;
+    setEndBefore(refNode: Node): void;
+    setStart(refNode: Node, offset: number): void;
+    setStartAfter(refNode: Node): void;
+    setStartBefore(refNode: Node): void;
+    surroundContents(newParent: Node): void;
+    toString(): string;
+    readonly END_TO_END: number;
+    readonly END_TO_START: number;
+    readonly START_TO_END: number;
+    readonly START_TO_START: number;
+}
+
+declare var Range: {
+    prototype: Range;
+    new(): Range;
+    readonly END_TO_END: number;
+    readonly END_TO_START: number;
+    readonly START_TO_END: number;
+    readonly START_TO_START: number;
+};
+
+interface ReadableStream {
+    readonly locked: boolean;
+    cancel(): Promise<void>;
+    getReader(): ReadableStreamReader;
+}
+
+declare var ReadableStream: {
+    prototype: ReadableStream;
+    new(): ReadableStream;
+};
+
+interface ReadableStreamReader {
+    cancel(): Promise<void>;
+    read(): Promise<any>;
+    releaseLock(): void;
+}
+
+declare var ReadableStreamReader: {
+    prototype: ReadableStreamReader;
+    new(): ReadableStreamReader;
+};
+
+interface Request extends Object, Body {
+    readonly cache: RequestCache;
+    readonly credentials: RequestCredentials;
+    readonly destination: RequestDestination;
+    readonly headers: Headers;
+    readonly integrity: string;
+    readonly keepalive: boolean;
+    readonly method: string;
+    readonly mode: RequestMode;
+    readonly redirect: RequestRedirect;
+    readonly referrer: string;
+    readonly referrerPolicy: ReferrerPolicy;
+    readonly type: RequestType;
+    readonly url: string;
+    clone(): Request;
+}
+
+declare var Request: {
+    prototype: Request;
+    new(input: Request | string, init?: RequestInit): Request;
+};
+
+interface Response extends Object, Body {
+    readonly body: ReadableStream | null;
+    readonly headers: Headers;
+    readonly ok: boolean;
+    readonly status: number;
+    readonly statusText: string;
+    readonly type: ResponseType;
+    readonly url: string;
+    clone(): Response;
+}
+
+declare var Response: {
+    prototype: Response;
+    new(body?: any, init?: ResponseInit): Response;
+    error: () => Response;
+    redirect: (url: string, status?: number) => Response;
+};
+
+interface RTCDtlsTransportEventMap {
+    "dtlsstatechange": RTCDtlsTransportStateChangedEvent;
+    "error": Event;
+}
+
+interface RTCDtlsTransport extends RTCStatsProvider {
+    ondtlsstatechange: ((this: RTCDtlsTransport, ev: RTCDtlsTransportStateChangedEvent) => any) | null;
+    onerror: ((this: RTCDtlsTransport, ev: Event) => any) | null;
+    readonly state: RTCDtlsTransportState;
+    readonly transport: RTCIceTransport;
+    getLocalParameters(): RTCDtlsParameters;
+    getRemoteCertificates(): ArrayBuffer[];
+    getRemoteParameters(): RTCDtlsParameters | null;
+    start(remoteParameters: RTCDtlsParameters): void;
+    stop(): void;
+    addEventListener<K extends keyof RTCDtlsTransportEventMap>(type: K, listener: (this: RTCDtlsTransport, ev: RTCDtlsTransportEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var RTCDtlsTransport: {
+    prototype: RTCDtlsTransport;
+    new(transport: RTCIceTransport): RTCDtlsTransport;
+};
+
+interface RTCDtlsTransportStateChangedEvent extends Event {
+    readonly state: RTCDtlsTransportState;
+}
+
+declare var RTCDtlsTransportStateChangedEvent: {
+    prototype: RTCDtlsTransportStateChangedEvent;
+    new(): RTCDtlsTransportStateChangedEvent;
+};
+
+interface RTCDtmfSenderEventMap {
+    "tonechange": RTCDTMFToneChangeEvent;
+}
+
+interface RTCDtmfSender extends EventTarget {
+    readonly canInsertDTMF: boolean;
+    readonly duration: number;
+    readonly interToneGap: number;
+    ontonechange: (this: RTCDtmfSender, ev: RTCDTMFToneChangeEvent) => any;
+    readonly sender: RTCRtpSender;
+    readonly toneBuffer: string;
+    insertDTMF(tones: string, duration?: number, interToneGap?: number): void;
+    addEventListener<K extends keyof RTCDtmfSenderEventMap>(type: K, listener: (this: RTCDtmfSender, ev: RTCDtmfSenderEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var RTCDtmfSender: {
+    prototype: RTCDtmfSender;
+    new(sender: RTCRtpSender): RTCDtmfSender;
+};
+
+interface RTCDTMFToneChangeEvent extends Event {
+    readonly tone: string;
+}
+
+declare var RTCDTMFToneChangeEvent: {
+    prototype: RTCDTMFToneChangeEvent;
+    new(typeArg: string, eventInitDict: RTCDTMFToneChangeEventInit): RTCDTMFToneChangeEvent;
+};
+
+interface RTCIceCandidate {
+    candidate: string | null;
+    sdpMid: string | null;
+    sdpMLineIndex: number | null;
+    toJSON(): any;
+}
+
+declare var RTCIceCandidate: {
+    prototype: RTCIceCandidate;
+    new(candidateInitDict?: RTCIceCandidateInit): RTCIceCandidate;
+};
+
+interface RTCIceCandidatePairChangedEvent extends Event {
+    readonly pair: RTCIceCandidatePair;
+}
+
+declare var RTCIceCandidatePairChangedEvent: {
+    prototype: RTCIceCandidatePairChangedEvent;
+    new(): RTCIceCandidatePairChangedEvent;
+};
+
+interface RTCIceGathererEventMap {
+    "error": Event;
+    "localcandidate": RTCIceGathererEvent;
+}
+
+interface RTCIceGatherer extends RTCStatsProvider {
+    readonly component: RTCIceComponent;
+    onerror: ((this: RTCIceGatherer, ev: Event) => any) | null;
+    onlocalcandidate: ((this: RTCIceGatherer, ev: RTCIceGathererEvent) => any) | null;
+    createAssociatedGatherer(): RTCIceGatherer;
+    getLocalCandidates(): RTCIceCandidateDictionary[];
+    getLocalParameters(): RTCIceParameters;
+    addEventListener<K extends keyof RTCIceGathererEventMap>(type: K, listener: (this: RTCIceGatherer, ev: RTCIceGathererEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var RTCIceGatherer: {
+    prototype: RTCIceGatherer;
+    new(options: RTCIceGatherOptions): RTCIceGatherer;
+};
+
+interface RTCIceGathererEvent extends Event {
+    readonly candidate: RTCIceCandidateDictionary | RTCIceCandidateComplete;
+}
+
+declare var RTCIceGathererEvent: {
+    prototype: RTCIceGathererEvent;
+    new(): RTCIceGathererEvent;
+};
+
+interface RTCIceTransportEventMap {
+    "candidatepairchange": RTCIceCandidatePairChangedEvent;
+    "icestatechange": RTCIceTransportStateChangedEvent;
+}
+
+interface RTCIceTransport extends RTCStatsProvider {
+    readonly component: RTCIceComponent;
+    readonly iceGatherer: RTCIceGatherer | null;
+    oncandidatepairchange: ((this: RTCIceTransport, ev: RTCIceCandidatePairChangedEvent) => any) | null;
+    onicestatechange: ((this: RTCIceTransport, ev: RTCIceTransportStateChangedEvent) => any) | null;
+    readonly role: RTCIceRole;
+    readonly state: RTCIceTransportState;
+    addRemoteCandidate(remoteCandidate: RTCIceCandidateDictionary | RTCIceCandidateComplete): void;
+    createAssociatedTransport(): RTCIceTransport;
+    getNominatedCandidatePair(): RTCIceCandidatePair | null;
+    getRemoteCandidates(): RTCIceCandidateDictionary[];
+    getRemoteParameters(): RTCIceParameters | null;
+    setRemoteCandidates(remoteCandidates: RTCIceCandidateDictionary[]): void;
+    start(gatherer: RTCIceGatherer, remoteParameters: RTCIceParameters, role?: RTCIceRole): void;
+    stop(): void;
+    addEventListener<K extends keyof RTCIceTransportEventMap>(type: K, listener: (this: RTCIceTransport, ev: RTCIceTransportEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var RTCIceTransport: {
+    prototype: RTCIceTransport;
+    new(): RTCIceTransport;
+};
+
+interface RTCIceTransportStateChangedEvent extends Event {
+    readonly state: RTCIceTransportState;
+}
+
+declare var RTCIceTransportStateChangedEvent: {
+    prototype: RTCIceTransportStateChangedEvent;
+    new(): RTCIceTransportStateChangedEvent;
+};
+
+interface RTCPeerConnectionEventMap {
+    "addstream": MediaStreamEvent;
+    "icecandidate": RTCPeerConnectionIceEvent;
+    "iceconnectionstatechange": Event;
+    "icegatheringstatechange": Event;
+    "negotiationneeded": Event;
+    "removestream": MediaStreamEvent;
+    "signalingstatechange": Event;
+}
+
+interface RTCPeerConnection extends EventTarget {
+    readonly canTrickleIceCandidates: boolean | null;
+    readonly iceConnectionState: RTCIceConnectionState;
+    readonly iceGatheringState: RTCIceGatheringState;
+    readonly localDescription: RTCSessionDescription | null;
+    onaddstream: (this: RTCPeerConnection, ev: MediaStreamEvent) => any;
+    onicecandidate: (this: RTCPeerConnection, ev: RTCPeerConnectionIceEvent) => any;
+    oniceconnectionstatechange: (this: RTCPeerConnection, ev: Event) => any;
+    onicegatheringstatechange: (this: RTCPeerConnection, ev: Event) => any;
+    onnegotiationneeded: (this: RTCPeerConnection, ev: Event) => any;
+    onremovestream: (this: RTCPeerConnection, ev: MediaStreamEvent) => any;
+    onsignalingstatechange: (this: RTCPeerConnection, ev: Event) => any;
+    readonly remoteDescription: RTCSessionDescription | null;
+    readonly signalingState: RTCSignalingState;
+    addIceCandidate(candidate: RTCIceCandidate, successCallback?: VoidFunction, failureCallback?: RTCPeerConnectionErrorCallback): Promise<void>;
+    addStream(stream: MediaStream): void;
+    close(): void;
+    createAnswer(successCallback?: RTCSessionDescriptionCallback, failureCallback?: RTCPeerConnectionErrorCallback): Promise<RTCSessionDescription>;
+    createOffer(successCallback?: RTCSessionDescriptionCallback, failureCallback?: RTCPeerConnectionErrorCallback, options?: RTCOfferOptions): Promise<RTCSessionDescription>;
+    getConfiguration(): RTCConfiguration;
+    getLocalStreams(): MediaStream[];
+    getRemoteStreams(): MediaStream[];
+    getStats(selector: MediaStreamTrack | null, successCallback?: RTCStatsCallback, failureCallback?: RTCPeerConnectionErrorCallback): Promise<RTCStatsReport>;
+    getStreamById(streamId: string): MediaStream | null;
+    removeStream(stream: MediaStream): void;
+    setLocalDescription(description: RTCSessionDescription, successCallback?: VoidFunction, failureCallback?: RTCPeerConnectionErrorCallback): Promise<void>;
+    setRemoteDescription(description: RTCSessionDescription, successCallback?: VoidFunction, failureCallback?: RTCPeerConnectionErrorCallback): Promise<void>;
+    addEventListener<K extends keyof RTCPeerConnectionEventMap>(type: K, listener: (this: RTCPeerConnection, ev: RTCPeerConnectionEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var RTCPeerConnection: {
+    prototype: RTCPeerConnection;
+    new(configuration: RTCConfiguration): RTCPeerConnection;
+};
+
+interface RTCPeerConnectionIceEvent extends Event {
+    readonly candidate: RTCIceCandidate;
+}
+
+declare var RTCPeerConnectionIceEvent: {
+    prototype: RTCPeerConnectionIceEvent;
+    new(type: string, eventInitDict: RTCPeerConnectionIceEventInit): RTCPeerConnectionIceEvent;
+};
+
+interface RTCRtpReceiverEventMap {
+    "error": Event;
+}
+
+interface RTCRtpReceiver extends RTCStatsProvider {
+    onerror: ((this: RTCRtpReceiver, ev: Event) => any) | null;
+    readonly rtcpTransport: RTCDtlsTransport;
+    readonly track: MediaStreamTrack | null;
+    readonly transport: RTCDtlsTransport | RTCSrtpSdesTransport;
+    getContributingSources(): RTCRtpContributingSource[];
+    receive(parameters: RTCRtpParameters): void;
+    requestSendCSRC(csrc: number): void;
+    setTransport(transport: RTCDtlsTransport | RTCSrtpSdesTransport, rtcpTransport?: RTCDtlsTransport): void;
+    stop(): void;
+    addEventListener<K extends keyof RTCRtpReceiverEventMap>(type: K, listener: (this: RTCRtpReceiver, ev: RTCRtpReceiverEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var RTCRtpReceiver: {
+    prototype: RTCRtpReceiver;
+    new(transport: RTCDtlsTransport | RTCSrtpSdesTransport, kind: string, rtcpTransport?: RTCDtlsTransport): RTCRtpReceiver;
+    getCapabilities(kind?: string): RTCRtpCapabilities;
+};
+
+interface RTCRtpSenderEventMap {
+    "error": Event;
+    "ssrcconflict": RTCSsrcConflictEvent;
+}
+
+interface RTCRtpSender extends RTCStatsProvider {
+    onerror: ((this: RTCRtpSender, ev: Event) => any) | null;
+    onssrcconflict: ((this: RTCRtpSender, ev: RTCSsrcConflictEvent) => any) | null;
+    readonly rtcpTransport: RTCDtlsTransport;
+    readonly track: MediaStreamTrack;
+    readonly transport: RTCDtlsTransport | RTCSrtpSdesTransport;
+    send(parameters: RTCRtpParameters): void;
+    setTrack(track: MediaStreamTrack): void;
+    setTransport(transport: RTCDtlsTransport | RTCSrtpSdesTransport, rtcpTransport?: RTCDtlsTransport): void;
+    stop(): void;
+    addEventListener<K extends keyof RTCRtpSenderEventMap>(type: K, listener: (this: RTCRtpSender, ev: RTCRtpSenderEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var RTCRtpSender: {
+    prototype: RTCRtpSender;
+    new(track: MediaStreamTrack, transport: RTCDtlsTransport | RTCSrtpSdesTransport, rtcpTransport?: RTCDtlsTransport): RTCRtpSender;
+    getCapabilities(kind?: string): RTCRtpCapabilities;
+};
+
+interface RTCSessionDescription {
+    sdp: string | null;
+    type: RTCSdpType | null;
+    toJSON(): any;
+}
+
+declare var RTCSessionDescription: {
+    prototype: RTCSessionDescription;
+    new(descriptionInitDict?: RTCSessionDescriptionInit): RTCSessionDescription;
+};
+
+interface RTCSrtpSdesTransportEventMap {
+    "error": Event;
+}
+
+interface RTCSrtpSdesTransport extends EventTarget {
+    onerror: ((this: RTCSrtpSdesTransport, ev: Event) => any) | null;
+    readonly transport: RTCIceTransport;
+    addEventListener<K extends keyof RTCSrtpSdesTransportEventMap>(type: K, listener: (this: RTCSrtpSdesTransport, ev: RTCSrtpSdesTransportEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var RTCSrtpSdesTransport: {
+    prototype: RTCSrtpSdesTransport;
+    new(transport: RTCIceTransport, encryptParameters: RTCSrtpSdesParameters, decryptParameters: RTCSrtpSdesParameters): RTCSrtpSdesTransport;
+    getLocalParameters(): RTCSrtpSdesParameters[];
+};
+
+interface RTCSsrcConflictEvent extends Event {
+    readonly ssrc: number;
+}
+
+declare var RTCSsrcConflictEvent: {
+    prototype: RTCSsrcConflictEvent;
+    new(): RTCSsrcConflictEvent;
+};
+
+interface RTCStatsProvider extends EventTarget {
+    getStats(): Promise<RTCStatsReport>;
+    msGetStats(): Promise<RTCStatsReport>;
+}
+
+declare var RTCStatsProvider: {
+    prototype: RTCStatsProvider;
+    new(): RTCStatsProvider;
+};
+
+interface ScopedCredential {
+    readonly id: ArrayBuffer;
+    readonly type: ScopedCredentialType;
+}
+
+declare var ScopedCredential: {
+    prototype: ScopedCredential;
+    new(): ScopedCredential;
+};
+
+interface ScopedCredentialInfo {
+    readonly credential: ScopedCredential;
+    readonly publicKey: CryptoKey;
+}
+
+declare var ScopedCredentialInfo: {
+    prototype: ScopedCredentialInfo;
+    new(): ScopedCredentialInfo;
+};
+
+interface ScreenEventMap {
+    "MSOrientationChange": Event;
+}
+
+interface Screen extends EventTarget {
+    readonly availHeight: number;
+    readonly availWidth: number;
+    bufferDepth: number;
+    readonly colorDepth: number;
+    readonly deviceXDPI: number;
+    readonly deviceYDPI: number;
+    readonly fontSmoothingEnabled: boolean;
+    readonly height: number;
+    readonly logicalXDPI: number;
+    readonly logicalYDPI: number;
+    readonly msOrientation: string;
+    onmsorientationchange: (this: Screen, ev: Event) => any;
+    readonly pixelDepth: number;
+    readonly systemXDPI: number;
+    readonly systemYDPI: number;
+    readonly width: number;
+    msLockOrientation(orientations: string | string[]): boolean;
+    msUnlockOrientation(): void;
+    addEventListener<K extends keyof ScreenEventMap>(type: K, listener: (this: Screen, ev: ScreenEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var Screen: {
+    prototype: Screen;
+    new(): Screen;
+};
+
+interface ScriptNotifyEvent extends Event {
+    readonly callingUri: string;
+    readonly value: string;
+}
+
+declare var ScriptNotifyEvent: {
+    prototype: ScriptNotifyEvent;
+    new(): ScriptNotifyEvent;
+};
+
+interface ScriptProcessorNodeEventMap {
+    "audioprocess": AudioProcessingEvent;
+}
+
+interface ScriptProcessorNode extends AudioNode {
+    readonly bufferSize: number;
+    onaudioprocess: (this: ScriptProcessorNode, ev: AudioProcessingEvent) => any;
+    addEventListener<K extends keyof ScriptProcessorNodeEventMap>(type: K, listener: (this: ScriptProcessorNode, ev: ScriptProcessorNodeEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var ScriptProcessorNode: {
+    prototype: ScriptProcessorNode;
+    new(): ScriptProcessorNode;
+};
+
+interface Selection {
+    readonly anchorNode: Node;
+    readonly anchorOffset: number;
+    readonly baseNode: Node;
+    readonly baseOffset: number;
+    readonly extentNode: Node;
+    readonly extentOffset: number;
+    readonly focusNode: Node;
+    readonly focusOffset: number;
+    readonly isCollapsed: boolean;
+    readonly rangeCount: number;
+    readonly type: string;
+    addRange(range: Range): void;
+    collapse(parentNode: Node, offset: number): void;
+    collapseToEnd(): void;
+    collapseToStart(): void;
+    containsNode(node: Node, partlyContained: boolean): boolean;
+    deleteFromDocument(): void;
+    empty(): void;
+    extend(newNode: Node, offset: number): void;
+    getRangeAt(index: number): Range;
+    removeAllRanges(): void;
+    removeRange(range: Range): void;
+    selectAllChildren(parentNode: Node): void;
+    setBaseAndExtent(baseNode: Node, baseOffset: number, extentNode: Node, extentOffset: number): void;
+    setPosition(parentNode: Node, offset: number): void;
+    toString(): string;
+}
+
+declare var Selection: {
+    prototype: Selection;
+    new(): Selection;
+};
+
+interface ServiceWorkerEventMap extends AbstractWorkerEventMap {
+    "statechange": Event;
+}
+
+interface ServiceWorker extends EventTarget, AbstractWorker {
+    onstatechange: (this: ServiceWorker, ev: Event) => any;
+    readonly scriptURL: USVString;
+    readonly state: ServiceWorkerState;
+    postMessage(message: any, transfer?: any[]): void;
+    addEventListener<K extends keyof ServiceWorkerEventMap>(type: K, listener: (this: ServiceWorker, ev: ServiceWorkerEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var ServiceWorker: {
+    prototype: ServiceWorker;
+    new(): ServiceWorker;
+};
+
+interface ServiceWorkerContainerEventMap {
+    "controllerchange": Event;
+    "message": ServiceWorkerMessageEvent;
+}
+
+interface ServiceWorkerContainer extends EventTarget {
+    readonly controller: ServiceWorker | null;
+    oncontrollerchange: (this: ServiceWorkerContainer, ev: Event) => any;
+    onmessage: (this: ServiceWorkerContainer, ev: ServiceWorkerMessageEvent) => any;
+    readonly ready: Promise<ServiceWorkerRegistration>;
+    getRegistration(clientURL?: USVString): Promise<any>;
+    getRegistrations(): any;
+    register(scriptURL: USVString, options?: RegistrationOptions): Promise<ServiceWorkerRegistration>;
+    addEventListener<K extends keyof ServiceWorkerContainerEventMap>(type: K, listener: (this: ServiceWorkerContainer, ev: ServiceWorkerContainerEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var ServiceWorkerContainer: {
+    prototype: ServiceWorkerContainer;
+    new(): ServiceWorkerContainer;
+};
+
+interface ServiceWorkerMessageEvent extends Event {
+    readonly data: any;
+    readonly lastEventId: string;
+    readonly origin: string;
+    readonly ports: MessagePort[] | null;
+    readonly source: ServiceWorker | MessagePort | null;
+}
+
+declare var ServiceWorkerMessageEvent: {
+    prototype: ServiceWorkerMessageEvent;
+    new(type: string, eventInitDict?: ServiceWorkerMessageEventInit): ServiceWorkerMessageEvent;
+};
+
+interface ServiceWorkerRegistrationEventMap {
+    "updatefound": Event;
+}
+
+interface ServiceWorkerRegistration extends EventTarget {
+    readonly active: ServiceWorker | null;
+    readonly installing: ServiceWorker | null;
+    onupdatefound: (this: ServiceWorkerRegistration, ev: Event) => any;
+    readonly pushManager: PushManager;
+    readonly scope: USVString;
+    readonly sync: SyncManager;
+    readonly waiting: ServiceWorker | null;
+    getNotifications(filter?: GetNotificationOptions): any;
+    showNotification(title: string, options?: NotificationOptions): Promise<void>;
+    unregister(): Promise<boolean>;
+    update(): Promise<void>;
+    addEventListener<K extends keyof ServiceWorkerRegistrationEventMap>(type: K, listener: (this: ServiceWorkerRegistration, ev: ServiceWorkerRegistrationEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var ServiceWorkerRegistration: {
+    prototype: ServiceWorkerRegistration;
+    new(): ServiceWorkerRegistration;
+};
+
+interface SourceBuffer extends EventTarget {
+    appendWindowEnd: number;
+    appendWindowStart: number;
+    readonly audioTracks: AudioTrackList;
+    readonly buffered: TimeRanges;
+    mode: AppendMode;
+    timestampOffset: number;
+    readonly updating: boolean;
+    readonly videoTracks: VideoTrackList;
+    abort(): void;
+    appendBuffer(data: ArrayBuffer | ArrayBufferView): void;
+    appendStream(stream: MSStream, maxSize?: number): void;
+    remove(start: number, end: number): void;
+}
+
+declare var SourceBuffer: {
+    prototype: SourceBuffer;
+    new(): SourceBuffer;
+};
+
+interface SourceBufferList extends EventTarget {
+    readonly length: number;
+    item(index: number): SourceBuffer;
+    [index: number]: SourceBuffer;
+}
+
+declare var SourceBufferList: {
+    prototype: SourceBufferList;
+    new(): SourceBufferList;
+};
+
+interface SpeechSynthesisEventMap {
+    "voiceschanged": Event;
+}
+
+interface SpeechSynthesis extends EventTarget {
+    onvoiceschanged: (this: SpeechSynthesis, ev: Event) => any;
+    readonly paused: boolean;
+    readonly pending: boolean;
+    readonly speaking: boolean;
+    cancel(): void;
+    getVoices(): SpeechSynthesisVoice[];
+    pause(): void;
+    resume(): void;
+    speak(utterance: SpeechSynthesisUtterance): void;
+    addEventListener<K extends keyof SpeechSynthesisEventMap>(type: K, listener: (this: SpeechSynthesis, ev: SpeechSynthesisEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SpeechSynthesis: {
+    prototype: SpeechSynthesis;
+    new(): SpeechSynthesis;
+};
+
+interface SpeechSynthesisEvent extends Event {
+    readonly charIndex: number;
+    readonly elapsedTime: number;
+    readonly name: string;
+    readonly utterance: SpeechSynthesisUtterance | null;
+}
+
+declare var SpeechSynthesisEvent: {
+    prototype: SpeechSynthesisEvent;
+    new(type: string, eventInitDict?: SpeechSynthesisEventInit): SpeechSynthesisEvent;
+};
+
+interface SpeechSynthesisUtteranceEventMap {
+    "boundary": Event;
+    "end": Event;
+    "error": Event;
+    "mark": Event;
+    "pause": Event;
+    "resume": Event;
+    "start": Event;
+}
+
+interface SpeechSynthesisUtterance extends EventTarget {
+    lang: string;
+    onboundary: (this: SpeechSynthesisUtterance, ev: Event) => any;
+    onend: (this: SpeechSynthesisUtterance, ev: Event) => any;
+    onerror: (this: SpeechSynthesisUtterance, ev: Event) => any;
+    onmark: (this: SpeechSynthesisUtterance, ev: Event) => any;
+    onpause: (this: SpeechSynthesisUtterance, ev: Event) => any;
+    onresume: (this: SpeechSynthesisUtterance, ev: Event) => any;
+    onstart: (this: SpeechSynthesisUtterance, ev: Event) => any;
+    pitch: number;
+    rate: number;
+    text: string;
+    voice: SpeechSynthesisVoice;
+    volume: number;
+    addEventListener<K extends keyof SpeechSynthesisUtteranceEventMap>(type: K, listener: (this: SpeechSynthesisUtterance, ev: SpeechSynthesisUtteranceEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SpeechSynthesisUtterance: {
+    prototype: SpeechSynthesisUtterance;
+    new(text?: string): SpeechSynthesisUtterance;
+};
+
+interface SpeechSynthesisVoice {
+    readonly default: boolean;
+    readonly lang: string;
+    readonly localService: boolean;
+    readonly name: string;
+    readonly voiceURI: string;
+}
+
+declare var SpeechSynthesisVoice: {
+    prototype: SpeechSynthesisVoice;
+    new(): SpeechSynthesisVoice;
+};
+
+interface StereoPannerNode extends AudioNode {
+    readonly pan: AudioParam;
+}
+
+declare var StereoPannerNode: {
+    prototype: StereoPannerNode;
+    new(): StereoPannerNode;
+};
+
+interface Storage {
+    readonly length: number;
+    clear(): void;
+    getItem(key: string): string | null;
+    key(index: number): string | null;
+    removeItem(key: string): void;
+    setItem(key: string, data: string): void;
+    [key: string]: any;
+    [index: number]: string;
+}
+
+declare var Storage: {
+    prototype: Storage;
+    new(): Storage;
+};
+
+interface StorageEvent extends Event {
+    readonly url: string;
+    key?: string;
+    oldValue?: string;
+    newValue?: string;
+    storageArea?: Storage;
+}
+
+declare var StorageEvent: {
+    prototype: StorageEvent;
+    new (type: string, eventInitDict?: StorageEventInit): StorageEvent;
+};
+
+interface StyleMedia {
+    readonly type: string;
+    matchMedium(mediaquery: string): boolean;
+}
+
+declare var StyleMedia: {
+    prototype: StyleMedia;
+    new(): StyleMedia;
+};
+
+interface StyleSheet {
+    disabled: boolean;
+    readonly href: string;
+    readonly media: MediaList;
+    readonly ownerNode: Node;
+    readonly parentStyleSheet: StyleSheet;
+    readonly title: string;
+    readonly type: string;
+}
+
+declare var StyleSheet: {
+    prototype: StyleSheet;
+    new(): StyleSheet;
+};
+
+interface StyleSheetList {
+    readonly length: number;
+    item(index?: number): StyleSheet;
+    [index: number]: StyleSheet;
+}
+
+declare var StyleSheetList: {
+    prototype: StyleSheetList;
+    new(): StyleSheetList;
+};
+
+interface StyleSheetPageList {
+    readonly length: number;
+    item(index: number): CSSPageRule;
+    [index: number]: CSSPageRule;
+}
+
+declare var StyleSheetPageList: {
+    prototype: StyleSheetPageList;
+    new(): StyleSheetPageList;
+};
+
+interface SubtleCrypto {
+    decrypt(algorithm: string | RsaOaepParams | AesCtrParams | AesCbcParams | AesCmacParams | AesGcmParams | AesCfbParams, key: CryptoKey, data: BufferSource): PromiseLike<ArrayBuffer>;
+    deriveBits(algorithm: string | EcdhKeyDeriveParams | DhKeyDeriveParams | ConcatParams | HkdfCtrParams | Pbkdf2Params, baseKey: CryptoKey, length: number): PromiseLike<ArrayBuffer>;
+    deriveKey(algorithm: string | EcdhKeyDeriveParams | DhKeyDeriveParams | ConcatParams | HkdfCtrParams | Pbkdf2Params, baseKey: CryptoKey, derivedKeyType: string | AesDerivedKeyParams | HmacImportParams | ConcatParams | HkdfCtrParams | Pbkdf2Params, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
+    digest(algorithm: AlgorithmIdentifier, data: BufferSource): PromiseLike<ArrayBuffer>;
+    encrypt(algorithm: string | RsaOaepParams | AesCtrParams | AesCbcParams | AesCmacParams | AesGcmParams | AesCfbParams, key: CryptoKey, data: BufferSource): PromiseLike<ArrayBuffer>;
+    exportKey(format: "jwk", key: CryptoKey): PromiseLike<JsonWebKey>;
+    exportKey(format: "raw" | "pkcs8" | "spki", key: CryptoKey): PromiseLike<ArrayBuffer>;
+    exportKey(format: string, key: CryptoKey): PromiseLike<JsonWebKey | ArrayBuffer>;
+    generateKey(algorithm: string, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKeyPair | CryptoKey>;
+    generateKey(algorithm: RsaHashedKeyGenParams | EcKeyGenParams | DhKeyGenParams, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKeyPair>;
+    generateKey(algorithm: AesKeyGenParams | HmacKeyGenParams | Pbkdf2Params, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
+    importKey(format: "jwk", keyData: JsonWebKey, algorithm: string | RsaHashedImportParams | EcKeyImportParams | HmacImportParams | DhImportKeyParams, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
+    importKey(format: "raw" | "pkcs8" | "spki", keyData: BufferSource, algorithm: string | RsaHashedImportParams | EcKeyImportParams | HmacImportParams | DhImportKeyParams, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
+    importKey(format: string, keyData: JsonWebKey | BufferSource, algorithm: string | RsaHashedImportParams | EcKeyImportParams | HmacImportParams | DhImportKeyParams, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
+    sign(algorithm: string | RsaPssParams | EcdsaParams | AesCmacParams, key: CryptoKey, data: BufferSource): PromiseLike<ArrayBuffer>;
+    unwrapKey(format: string, wrappedKey: BufferSource, unwrappingKey: CryptoKey, unwrapAlgorithm: AlgorithmIdentifier, unwrappedKeyAlgorithm: AlgorithmIdentifier, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
+    verify(algorithm: string | RsaPssParams | EcdsaParams | AesCmacParams, key: CryptoKey, signature: BufferSource, data: BufferSource): PromiseLike<boolean>;
+    wrapKey(format: string, key: CryptoKey, wrappingKey: CryptoKey, wrapAlgorithm: AlgorithmIdentifier): PromiseLike<ArrayBuffer>;
+}
+
+declare var SubtleCrypto: {
+    prototype: SubtleCrypto;
+    new(): SubtleCrypto;
+};
+
+interface SVGAElement extends SVGGraphicsElement, SVGURIReference {
+    readonly target: SVGAnimatedString;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGAElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGAElement: {
+    prototype: SVGAElement;
+    new(): SVGAElement;
+};
+
+interface SVGAngle {
+    readonly unitType: number;
+    value: number;
+    valueAsString: string;
+    valueInSpecifiedUnits: number;
+    convertToSpecifiedUnits(unitType: number): void;
+    newValueSpecifiedUnits(unitType: number, valueInSpecifiedUnits: number): void;
+    readonly SVG_ANGLETYPE_DEG: number;
+    readonly SVG_ANGLETYPE_GRAD: number;
+    readonly SVG_ANGLETYPE_RAD: number;
+    readonly SVG_ANGLETYPE_UNKNOWN: number;
+    readonly SVG_ANGLETYPE_UNSPECIFIED: number;
+}
+
+declare var SVGAngle: {
+    prototype: SVGAngle;
+    new(): SVGAngle;
+    readonly SVG_ANGLETYPE_DEG: number;
+    readonly SVG_ANGLETYPE_GRAD: number;
+    readonly SVG_ANGLETYPE_RAD: number;
+    readonly SVG_ANGLETYPE_UNKNOWN: number;
+    readonly SVG_ANGLETYPE_UNSPECIFIED: number;
+};
+
+interface SVGAnimatedAngle {
+    readonly animVal: SVGAngle;
+    readonly baseVal: SVGAngle;
+}
+
+declare var SVGAnimatedAngle: {
+    prototype: SVGAnimatedAngle;
+    new(): SVGAnimatedAngle;
+};
+
+interface SVGAnimatedBoolean {
+    readonly animVal: boolean;
+    baseVal: boolean;
+}
+
+declare var SVGAnimatedBoolean: {
+    prototype: SVGAnimatedBoolean;
+    new(): SVGAnimatedBoolean;
+};
+
+interface SVGAnimatedEnumeration {
+    readonly animVal: number;
+    baseVal: number;
+}
+
+declare var SVGAnimatedEnumeration: {
+    prototype: SVGAnimatedEnumeration;
+    new(): SVGAnimatedEnumeration;
+};
+
+interface SVGAnimatedInteger {
+    readonly animVal: number;
+    baseVal: number;
+}
+
+declare var SVGAnimatedInteger: {
+    prototype: SVGAnimatedInteger;
+    new(): SVGAnimatedInteger;
+};
+
+interface SVGAnimatedLength {
+    readonly animVal: SVGLength;
+    readonly baseVal: SVGLength;
+}
+
+declare var SVGAnimatedLength: {
+    prototype: SVGAnimatedLength;
+    new(): SVGAnimatedLength;
+};
+
+interface SVGAnimatedLengthList {
+    readonly animVal: SVGLengthList;
+    readonly baseVal: SVGLengthList;
+}
+
+declare var SVGAnimatedLengthList: {
+    prototype: SVGAnimatedLengthList;
+    new(): SVGAnimatedLengthList;
+};
+
+interface SVGAnimatedNumber {
+    readonly animVal: number;
+    baseVal: number;
+}
+
+declare var SVGAnimatedNumber: {
+    prototype: SVGAnimatedNumber;
+    new(): SVGAnimatedNumber;
+};
+
+interface SVGAnimatedNumberList {
+    readonly animVal: SVGNumberList;
+    readonly baseVal: SVGNumberList;
+}
+
+declare var SVGAnimatedNumberList: {
+    prototype: SVGAnimatedNumberList;
+    new(): SVGAnimatedNumberList;
+};
+
+interface SVGAnimatedPreserveAspectRatio {
+    readonly animVal: SVGPreserveAspectRatio;
+    readonly baseVal: SVGPreserveAspectRatio;
+}
+
+declare var SVGAnimatedPreserveAspectRatio: {
+    prototype: SVGAnimatedPreserveAspectRatio;
+    new(): SVGAnimatedPreserveAspectRatio;
+};
+
+interface SVGAnimatedRect {
+    readonly animVal: SVGRect;
+    readonly baseVal: SVGRect;
+}
+
+declare var SVGAnimatedRect: {
+    prototype: SVGAnimatedRect;
+    new(): SVGAnimatedRect;
+};
+
+interface SVGAnimatedString {
+    readonly animVal: string;
+    baseVal: string;
+}
+
+declare var SVGAnimatedString: {
+    prototype: SVGAnimatedString;
+    new(): SVGAnimatedString;
+};
+
+interface SVGAnimatedTransformList {
+    readonly animVal: SVGTransformList;
+    readonly baseVal: SVGTransformList;
+}
+
+declare var SVGAnimatedTransformList: {
+    prototype: SVGAnimatedTransformList;
+    new(): SVGAnimatedTransformList;
+};
+
+interface SVGCircleElement extends SVGGraphicsElement {
+    readonly cx: SVGAnimatedLength;
+    readonly cy: SVGAnimatedLength;
+    readonly r: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGCircleElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGCircleElement: {
+    prototype: SVGCircleElement;
+    new(): SVGCircleElement;
+};
+
+interface SVGClipPathElement extends SVGGraphicsElement, SVGUnitTypes {
+    readonly clipPathUnits: SVGAnimatedEnumeration;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGClipPathElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGClipPathElement: {
+    prototype: SVGClipPathElement;
+    new(): SVGClipPathElement;
+};
+
+interface SVGComponentTransferFunctionElement extends SVGElement {
+    readonly amplitude: SVGAnimatedNumber;
+    readonly exponent: SVGAnimatedNumber;
+    readonly intercept: SVGAnimatedNumber;
+    readonly offset: SVGAnimatedNumber;
+    readonly slope: SVGAnimatedNumber;
+    readonly tableValues: SVGAnimatedNumberList;
+    readonly type: SVGAnimatedEnumeration;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_DISCRETE: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_GAMMA: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_IDENTITY: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_LINEAR: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_TABLE: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGComponentTransferFunctionElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGComponentTransferFunctionElement: {
+    prototype: SVGComponentTransferFunctionElement;
+    new(): SVGComponentTransferFunctionElement;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_DISCRETE: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_GAMMA: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_IDENTITY: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_LINEAR: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_TABLE: number;
+    readonly SVG_FECOMPONENTTRANSFER_TYPE_UNKNOWN: number;
+};
+
+interface SVGDefsElement extends SVGGraphicsElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGDefsElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGDefsElement: {
+    prototype: SVGDefsElement;
+    new(): SVGDefsElement;
+};
+
+interface SVGDescElement extends SVGElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGDescElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGDescElement: {
+    prototype: SVGDescElement;
+    new(): SVGDescElement;
+};
+
+interface SVGElementEventMap extends ElementEventMap {
+    "click": MouseEvent;
+    "dblclick": MouseEvent;
+    "focusin": FocusEvent;
+    "focusout": FocusEvent;
+    "load": Event;
+    "mousedown": MouseEvent;
+    "mousemove": MouseEvent;
+    "mouseout": MouseEvent;
+    "mouseover": MouseEvent;
+    "mouseup": MouseEvent;
+}
+
+interface SVGElement extends Element {
+    className: any;
+    onclick: (this: SVGElement, ev: MouseEvent) => any;
+    ondblclick: (this: SVGElement, ev: MouseEvent) => any;
+    onfocusin: (this: SVGElement, ev: FocusEvent) => any;
+    onfocusout: (this: SVGElement, ev: FocusEvent) => any;
+    onload: (this: SVGElement, ev: Event) => any;
+    onmousedown: (this: SVGElement, ev: MouseEvent) => any;
+    onmousemove: (this: SVGElement, ev: MouseEvent) => any;
+    onmouseout: (this: SVGElement, ev: MouseEvent) => any;
+    onmouseover: (this: SVGElement, ev: MouseEvent) => any;
+    onmouseup: (this: SVGElement, ev: MouseEvent) => any;
+    readonly ownerSVGElement: SVGSVGElement;
+    readonly style: CSSStyleDeclaration;
+    readonly viewportElement: SVGElement;
+    xmlbase: string;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGElement: {
+    prototype: SVGElement;
+    new(): SVGElement;
+};
+
+interface SVGElementInstance extends EventTarget {
+    readonly childNodes: SVGElementInstanceList;
+    readonly correspondingElement: SVGElement;
+    readonly correspondingUseElement: SVGUseElement;
+    readonly firstChild: SVGElementInstance;
+    readonly lastChild: SVGElementInstance;
+    readonly nextSibling: SVGElementInstance;
+    readonly parentNode: SVGElementInstance;
+    readonly previousSibling: SVGElementInstance;
+}
+
+declare var SVGElementInstance: {
+    prototype: SVGElementInstance;
+    new(): SVGElementInstance;
+};
+
+interface SVGElementInstanceList {
+    readonly length: number;
+    item(index: number): SVGElementInstance;
+}
+
+declare var SVGElementInstanceList: {
+    prototype: SVGElementInstanceList;
+    new(): SVGElementInstanceList;
+};
+
+interface SVGEllipseElement extends SVGGraphicsElement {
+    readonly cx: SVGAnimatedLength;
+    readonly cy: SVGAnimatedLength;
+    readonly rx: SVGAnimatedLength;
+    readonly ry: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGEllipseElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGEllipseElement: {
+    prototype: SVGEllipseElement;
+    new(): SVGEllipseElement;
+};
+
+interface SVGFEBlendElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    readonly in2: SVGAnimatedString;
+    readonly mode: SVGAnimatedEnumeration;
+    readonly SVG_FEBLEND_MODE_COLOR: number;
+    readonly SVG_FEBLEND_MODE_COLOR_BURN: number;
+    readonly SVG_FEBLEND_MODE_COLOR_DODGE: number;
+    readonly SVG_FEBLEND_MODE_DARKEN: number;
+    readonly SVG_FEBLEND_MODE_DIFFERENCE: number;
+    readonly SVG_FEBLEND_MODE_EXCLUSION: number;
+    readonly SVG_FEBLEND_MODE_HARD_LIGHT: number;
+    readonly SVG_FEBLEND_MODE_HUE: number;
+    readonly SVG_FEBLEND_MODE_LIGHTEN: number;
+    readonly SVG_FEBLEND_MODE_LUMINOSITY: number;
+    readonly SVG_FEBLEND_MODE_MULTIPLY: number;
+    readonly SVG_FEBLEND_MODE_NORMAL: number;
+    readonly SVG_FEBLEND_MODE_OVERLAY: number;
+    readonly SVG_FEBLEND_MODE_SATURATION: number;
+    readonly SVG_FEBLEND_MODE_SCREEN: number;
+    readonly SVG_FEBLEND_MODE_SOFT_LIGHT: number;
+    readonly SVG_FEBLEND_MODE_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEBlendElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEBlendElement: {
+    prototype: SVGFEBlendElement;
+    new(): SVGFEBlendElement;
+    readonly SVG_FEBLEND_MODE_COLOR: number;
+    readonly SVG_FEBLEND_MODE_COLOR_BURN: number;
+    readonly SVG_FEBLEND_MODE_COLOR_DODGE: number;
+    readonly SVG_FEBLEND_MODE_DARKEN: number;
+    readonly SVG_FEBLEND_MODE_DIFFERENCE: number;
+    readonly SVG_FEBLEND_MODE_EXCLUSION: number;
+    readonly SVG_FEBLEND_MODE_HARD_LIGHT: number;
+    readonly SVG_FEBLEND_MODE_HUE: number;
+    readonly SVG_FEBLEND_MODE_LIGHTEN: number;
+    readonly SVG_FEBLEND_MODE_LUMINOSITY: number;
+    readonly SVG_FEBLEND_MODE_MULTIPLY: number;
+    readonly SVG_FEBLEND_MODE_NORMAL: number;
+    readonly SVG_FEBLEND_MODE_OVERLAY: number;
+    readonly SVG_FEBLEND_MODE_SATURATION: number;
+    readonly SVG_FEBLEND_MODE_SCREEN: number;
+    readonly SVG_FEBLEND_MODE_SOFT_LIGHT: number;
+    readonly SVG_FEBLEND_MODE_UNKNOWN: number;
+};
+
+interface SVGFEColorMatrixElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    readonly type: SVGAnimatedEnumeration;
+    readonly values: SVGAnimatedNumberList;
+    readonly SVG_FECOLORMATRIX_TYPE_HUEROTATE: number;
+    readonly SVG_FECOLORMATRIX_TYPE_LUMINANCETOALPHA: number;
+    readonly SVG_FECOLORMATRIX_TYPE_MATRIX: number;
+    readonly SVG_FECOLORMATRIX_TYPE_SATURATE: number;
+    readonly SVG_FECOLORMATRIX_TYPE_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEColorMatrixElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEColorMatrixElement: {
+    prototype: SVGFEColorMatrixElement;
+    new(): SVGFEColorMatrixElement;
+    readonly SVG_FECOLORMATRIX_TYPE_HUEROTATE: number;
+    readonly SVG_FECOLORMATRIX_TYPE_LUMINANCETOALPHA: number;
+    readonly SVG_FECOLORMATRIX_TYPE_MATRIX: number;
+    readonly SVG_FECOLORMATRIX_TYPE_SATURATE: number;
+    readonly SVG_FECOLORMATRIX_TYPE_UNKNOWN: number;
+};
+
+interface SVGFEComponentTransferElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEComponentTransferElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEComponentTransferElement: {
+    prototype: SVGFEComponentTransferElement;
+    new(): SVGFEComponentTransferElement;
+};
+
+interface SVGFECompositeElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    readonly in2: SVGAnimatedString;
+    readonly k1: SVGAnimatedNumber;
+    readonly k2: SVGAnimatedNumber;
+    readonly k3: SVGAnimatedNumber;
+    readonly k4: SVGAnimatedNumber;
+    readonly operator: SVGAnimatedEnumeration;
+    readonly SVG_FECOMPOSITE_OPERATOR_ARITHMETIC: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_ATOP: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_IN: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_OUT: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_OVER: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_UNKNOWN: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_XOR: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFECompositeElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFECompositeElement: {
+    prototype: SVGFECompositeElement;
+    new(): SVGFECompositeElement;
+    readonly SVG_FECOMPOSITE_OPERATOR_ARITHMETIC: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_ATOP: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_IN: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_OUT: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_OVER: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_UNKNOWN: number;
+    readonly SVG_FECOMPOSITE_OPERATOR_XOR: number;
+};
+
+interface SVGFEConvolveMatrixElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly bias: SVGAnimatedNumber;
+    readonly divisor: SVGAnimatedNumber;
+    readonly edgeMode: SVGAnimatedEnumeration;
+    readonly in1: SVGAnimatedString;
+    readonly kernelMatrix: SVGAnimatedNumberList;
+    readonly kernelUnitLengthX: SVGAnimatedNumber;
+    readonly kernelUnitLengthY: SVGAnimatedNumber;
+    readonly orderX: SVGAnimatedInteger;
+    readonly orderY: SVGAnimatedInteger;
+    readonly preserveAlpha: SVGAnimatedBoolean;
+    readonly targetX: SVGAnimatedInteger;
+    readonly targetY: SVGAnimatedInteger;
+    readonly SVG_EDGEMODE_DUPLICATE: number;
+    readonly SVG_EDGEMODE_NONE: number;
+    readonly SVG_EDGEMODE_UNKNOWN: number;
+    readonly SVG_EDGEMODE_WRAP: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEConvolveMatrixElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEConvolveMatrixElement: {
+    prototype: SVGFEConvolveMatrixElement;
+    new(): SVGFEConvolveMatrixElement;
+    readonly SVG_EDGEMODE_DUPLICATE: number;
+    readonly SVG_EDGEMODE_NONE: number;
+    readonly SVG_EDGEMODE_UNKNOWN: number;
+    readonly SVG_EDGEMODE_WRAP: number;
+};
+
+interface SVGFEDiffuseLightingElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly diffuseConstant: SVGAnimatedNumber;
+    readonly in1: SVGAnimatedString;
+    readonly kernelUnitLengthX: SVGAnimatedNumber;
+    readonly kernelUnitLengthY: SVGAnimatedNumber;
+    readonly surfaceScale: SVGAnimatedNumber;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEDiffuseLightingElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEDiffuseLightingElement: {
+    prototype: SVGFEDiffuseLightingElement;
+    new(): SVGFEDiffuseLightingElement;
+};
+
+interface SVGFEDisplacementMapElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    readonly in2: SVGAnimatedString;
+    readonly scale: SVGAnimatedNumber;
+    readonly xChannelSelector: SVGAnimatedEnumeration;
+    readonly yChannelSelector: SVGAnimatedEnumeration;
+    readonly SVG_CHANNEL_A: number;
+    readonly SVG_CHANNEL_B: number;
+    readonly SVG_CHANNEL_G: number;
+    readonly SVG_CHANNEL_R: number;
+    readonly SVG_CHANNEL_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEDisplacementMapElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEDisplacementMapElement: {
+    prototype: SVGFEDisplacementMapElement;
+    new(): SVGFEDisplacementMapElement;
+    readonly SVG_CHANNEL_A: number;
+    readonly SVG_CHANNEL_B: number;
+    readonly SVG_CHANNEL_G: number;
+    readonly SVG_CHANNEL_R: number;
+    readonly SVG_CHANNEL_UNKNOWN: number;
+};
+
+interface SVGFEDistantLightElement extends SVGElement {
+    readonly azimuth: SVGAnimatedNumber;
+    readonly elevation: SVGAnimatedNumber;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEDistantLightElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEDistantLightElement: {
+    prototype: SVGFEDistantLightElement;
+    new(): SVGFEDistantLightElement;
+};
+
+interface SVGFEFloodElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEFloodElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEFloodElement: {
+    prototype: SVGFEFloodElement;
+    new(): SVGFEFloodElement;
+};
+
+interface SVGFEFuncAElement extends SVGComponentTransferFunctionElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEFuncAElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEFuncAElement: {
+    prototype: SVGFEFuncAElement;
+    new(): SVGFEFuncAElement;
+};
+
+interface SVGFEFuncBElement extends SVGComponentTransferFunctionElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEFuncBElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEFuncBElement: {
+    prototype: SVGFEFuncBElement;
+    new(): SVGFEFuncBElement;
+};
+
+interface SVGFEFuncGElement extends SVGComponentTransferFunctionElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEFuncGElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEFuncGElement: {
+    prototype: SVGFEFuncGElement;
+    new(): SVGFEFuncGElement;
+};
+
+interface SVGFEFuncRElement extends SVGComponentTransferFunctionElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEFuncRElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEFuncRElement: {
+    prototype: SVGFEFuncRElement;
+    new(): SVGFEFuncRElement;
+};
+
+interface SVGFEGaussianBlurElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    readonly stdDeviationX: SVGAnimatedNumber;
+    readonly stdDeviationY: SVGAnimatedNumber;
+    setStdDeviation(stdDeviationX: number, stdDeviationY: number): void;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEGaussianBlurElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEGaussianBlurElement: {
+    prototype: SVGFEGaussianBlurElement;
+    new(): SVGFEGaussianBlurElement;
+};
+
+interface SVGFEImageElement extends SVGElement, SVGFilterPrimitiveStandardAttributes, SVGURIReference {
+    readonly preserveAspectRatio: SVGAnimatedPreserveAspectRatio;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEImageElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEImageElement: {
+    prototype: SVGFEImageElement;
+    new(): SVGFEImageElement;
+};
+
+interface SVGFEMergeElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEMergeElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEMergeElement: {
+    prototype: SVGFEMergeElement;
+    new(): SVGFEMergeElement;
+};
+
+interface SVGFEMergeNodeElement extends SVGElement {
+    readonly in1: SVGAnimatedString;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEMergeNodeElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEMergeNodeElement: {
+    prototype: SVGFEMergeNodeElement;
+    new(): SVGFEMergeNodeElement;
+};
+
+interface SVGFEMorphologyElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    readonly operator: SVGAnimatedEnumeration;
+    readonly radiusX: SVGAnimatedNumber;
+    readonly radiusY: SVGAnimatedNumber;
+    readonly SVG_MORPHOLOGY_OPERATOR_DILATE: number;
+    readonly SVG_MORPHOLOGY_OPERATOR_ERODE: number;
+    readonly SVG_MORPHOLOGY_OPERATOR_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEMorphologyElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEMorphologyElement: {
+    prototype: SVGFEMorphologyElement;
+    new(): SVGFEMorphologyElement;
+    readonly SVG_MORPHOLOGY_OPERATOR_DILATE: number;
+    readonly SVG_MORPHOLOGY_OPERATOR_ERODE: number;
+    readonly SVG_MORPHOLOGY_OPERATOR_UNKNOWN: number;
+};
+
+interface SVGFEOffsetElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly dx: SVGAnimatedNumber;
+    readonly dy: SVGAnimatedNumber;
+    readonly in1: SVGAnimatedString;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEOffsetElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEOffsetElement: {
+    prototype: SVGFEOffsetElement;
+    new(): SVGFEOffsetElement;
+};
+
+interface SVGFEPointLightElement extends SVGElement {
+    readonly x: SVGAnimatedNumber;
+    readonly y: SVGAnimatedNumber;
+    readonly z: SVGAnimatedNumber;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFEPointLightElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFEPointLightElement: {
+    prototype: SVGFEPointLightElement;
+    new(): SVGFEPointLightElement;
+};
+
+interface SVGFESpecularLightingElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    readonly kernelUnitLengthX: SVGAnimatedNumber;
+    readonly kernelUnitLengthY: SVGAnimatedNumber;
+    readonly specularConstant: SVGAnimatedNumber;
+    readonly specularExponent: SVGAnimatedNumber;
+    readonly surfaceScale: SVGAnimatedNumber;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFESpecularLightingElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFESpecularLightingElement: {
+    prototype: SVGFESpecularLightingElement;
+    new(): SVGFESpecularLightingElement;
+};
+
+interface SVGFESpotLightElement extends SVGElement {
+    readonly limitingConeAngle: SVGAnimatedNumber;
+    readonly pointsAtX: SVGAnimatedNumber;
+    readonly pointsAtY: SVGAnimatedNumber;
+    readonly pointsAtZ: SVGAnimatedNumber;
+    readonly specularExponent: SVGAnimatedNumber;
+    readonly x: SVGAnimatedNumber;
+    readonly y: SVGAnimatedNumber;
+    readonly z: SVGAnimatedNumber;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFESpotLightElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFESpotLightElement: {
+    prototype: SVGFESpotLightElement;
+    new(): SVGFESpotLightElement;
+};
+
+interface SVGFETileElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly in1: SVGAnimatedString;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFETileElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFETileElement: {
+    prototype: SVGFETileElement;
+    new(): SVGFETileElement;
+};
+
+interface SVGFETurbulenceElement extends SVGElement, SVGFilterPrimitiveStandardAttributes {
+    readonly baseFrequencyX: SVGAnimatedNumber;
+    readonly baseFrequencyY: SVGAnimatedNumber;
+    readonly numOctaves: SVGAnimatedInteger;
+    readonly seed: SVGAnimatedNumber;
+    readonly stitchTiles: SVGAnimatedEnumeration;
+    readonly type: SVGAnimatedEnumeration;
+    readonly SVG_STITCHTYPE_NOSTITCH: number;
+    readonly SVG_STITCHTYPE_STITCH: number;
+    readonly SVG_STITCHTYPE_UNKNOWN: number;
+    readonly SVG_TURBULENCE_TYPE_FRACTALNOISE: number;
+    readonly SVG_TURBULENCE_TYPE_TURBULENCE: number;
+    readonly SVG_TURBULENCE_TYPE_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFETurbulenceElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFETurbulenceElement: {
+    prototype: SVGFETurbulenceElement;
+    new(): SVGFETurbulenceElement;
+    readonly SVG_STITCHTYPE_NOSTITCH: number;
+    readonly SVG_STITCHTYPE_STITCH: number;
+    readonly SVG_STITCHTYPE_UNKNOWN: number;
+    readonly SVG_TURBULENCE_TYPE_FRACTALNOISE: number;
+    readonly SVG_TURBULENCE_TYPE_TURBULENCE: number;
+    readonly SVG_TURBULENCE_TYPE_UNKNOWN: number;
+};
+
+interface SVGFilterElement extends SVGElement, SVGUnitTypes, SVGURIReference {
+    readonly filterResX: SVGAnimatedInteger;
+    readonly filterResY: SVGAnimatedInteger;
+    readonly filterUnits: SVGAnimatedEnumeration;
+    readonly height: SVGAnimatedLength;
+    readonly primitiveUnits: SVGAnimatedEnumeration;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+    setFilterRes(filterResX: number, filterResY: number): void;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGFilterElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGFilterElement: {
+    prototype: SVGFilterElement;
+    new(): SVGFilterElement;
+};
+
+interface SVGForeignObjectElement extends SVGGraphicsElement {
+    readonly height: SVGAnimatedLength;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGForeignObjectElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGForeignObjectElement: {
+    prototype: SVGForeignObjectElement;
+    new(): SVGForeignObjectElement;
+};
+
+interface SVGGElement extends SVGGraphicsElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGGElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGGElement: {
+    prototype: SVGGElement;
+    new(): SVGGElement;
+};
+
+interface SVGGradientElement extends SVGElement, SVGUnitTypes, SVGURIReference {
+    readonly gradientTransform: SVGAnimatedTransformList;
+    readonly gradientUnits: SVGAnimatedEnumeration;
+    readonly spreadMethod: SVGAnimatedEnumeration;
+    readonly SVG_SPREADMETHOD_PAD: number;
+    readonly SVG_SPREADMETHOD_REFLECT: number;
+    readonly SVG_SPREADMETHOD_REPEAT: number;
+    readonly SVG_SPREADMETHOD_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGGradientElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGGradientElement: {
+    prototype: SVGGradientElement;
+    new(): SVGGradientElement;
+    readonly SVG_SPREADMETHOD_PAD: number;
+    readonly SVG_SPREADMETHOD_REFLECT: number;
+    readonly SVG_SPREADMETHOD_REPEAT: number;
+    readonly SVG_SPREADMETHOD_UNKNOWN: number;
+};
+
+interface SVGGraphicsElement extends SVGElement, SVGTests {
+    readonly farthestViewportElement: SVGElement;
+    readonly nearestViewportElement: SVGElement;
+    readonly transform: SVGAnimatedTransformList;
+    getBBox(): SVGRect;
+    getCTM(): SVGMatrix;
+    getScreenCTM(): SVGMatrix;
+    getTransformToElement(element: SVGElement): SVGMatrix;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGGraphicsElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGGraphicsElement: {
+    prototype: SVGGraphicsElement;
+    new(): SVGGraphicsElement;
+};
+
+interface SVGImageElement extends SVGGraphicsElement, SVGURIReference {
+    readonly height: SVGAnimatedLength;
+    readonly preserveAspectRatio: SVGAnimatedPreserveAspectRatio;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGImageElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGImageElement: {
+    prototype: SVGImageElement;
+    new(): SVGImageElement;
+};
+
+interface SVGLength {
+    readonly unitType: number;
+    value: number;
+    valueAsString: string;
+    valueInSpecifiedUnits: number;
+    convertToSpecifiedUnits(unitType: number): void;
+    newValueSpecifiedUnits(unitType: number, valueInSpecifiedUnits: number): void;
+    readonly SVG_LENGTHTYPE_CM: number;
+    readonly SVG_LENGTHTYPE_EMS: number;
+    readonly SVG_LENGTHTYPE_EXS: number;
+    readonly SVG_LENGTHTYPE_IN: number;
+    readonly SVG_LENGTHTYPE_MM: number;
+    readonly SVG_LENGTHTYPE_NUMBER: number;
+    readonly SVG_LENGTHTYPE_PC: number;
+    readonly SVG_LENGTHTYPE_PERCENTAGE: number;
+    readonly SVG_LENGTHTYPE_PT: number;
+    readonly SVG_LENGTHTYPE_PX: number;
+    readonly SVG_LENGTHTYPE_UNKNOWN: number;
+}
+
+declare var SVGLength: {
+    prototype: SVGLength;
+    new(): SVGLength;
+    readonly SVG_LENGTHTYPE_CM: number;
+    readonly SVG_LENGTHTYPE_EMS: number;
+    readonly SVG_LENGTHTYPE_EXS: number;
+    readonly SVG_LENGTHTYPE_IN: number;
+    readonly SVG_LENGTHTYPE_MM: number;
+    readonly SVG_LENGTHTYPE_NUMBER: number;
+    readonly SVG_LENGTHTYPE_PC: number;
+    readonly SVG_LENGTHTYPE_PERCENTAGE: number;
+    readonly SVG_LENGTHTYPE_PT: number;
+    readonly SVG_LENGTHTYPE_PX: number;
+    readonly SVG_LENGTHTYPE_UNKNOWN: number;
+};
+
+interface SVGLengthList {
+    readonly numberOfItems: number;
+    appendItem(newItem: SVGLength): SVGLength;
+    clear(): void;
+    getItem(index: number): SVGLength;
+    initialize(newItem: SVGLength): SVGLength;
+    insertItemBefore(newItem: SVGLength, index: number): SVGLength;
+    removeItem(index: number): SVGLength;
+    replaceItem(newItem: SVGLength, index: number): SVGLength;
+}
+
+declare var SVGLengthList: {
+    prototype: SVGLengthList;
+    new(): SVGLengthList;
+};
+
+interface SVGLinearGradientElement extends SVGGradientElement {
+    readonly x1: SVGAnimatedLength;
+    readonly x2: SVGAnimatedLength;
+    readonly y1: SVGAnimatedLength;
+    readonly y2: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGLinearGradientElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGLinearGradientElement: {
+    prototype: SVGLinearGradientElement;
+    new(): SVGLinearGradientElement;
+};
+
+interface SVGLineElement extends SVGGraphicsElement {
+    readonly x1: SVGAnimatedLength;
+    readonly x2: SVGAnimatedLength;
+    readonly y1: SVGAnimatedLength;
+    readonly y2: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGLineElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGLineElement: {
+    prototype: SVGLineElement;
+    new(): SVGLineElement;
+};
+
+interface SVGMarkerElement extends SVGElement, SVGFitToViewBox {
+    readonly markerHeight: SVGAnimatedLength;
+    readonly markerUnits: SVGAnimatedEnumeration;
+    readonly markerWidth: SVGAnimatedLength;
+    readonly orientAngle: SVGAnimatedAngle;
+    readonly orientType: SVGAnimatedEnumeration;
+    readonly refX: SVGAnimatedLength;
+    readonly refY: SVGAnimatedLength;
+    setOrientToAngle(angle: SVGAngle): void;
+    setOrientToAuto(): void;
+    readonly SVG_MARKER_ORIENT_ANGLE: number;
+    readonly SVG_MARKER_ORIENT_AUTO: number;
+    readonly SVG_MARKER_ORIENT_UNKNOWN: number;
+    readonly SVG_MARKERUNITS_STROKEWIDTH: number;
+    readonly SVG_MARKERUNITS_UNKNOWN: number;
+    readonly SVG_MARKERUNITS_USERSPACEONUSE: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGMarkerElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGMarkerElement: {
+    prototype: SVGMarkerElement;
+    new(): SVGMarkerElement;
+    readonly SVG_MARKER_ORIENT_ANGLE: number;
+    readonly SVG_MARKER_ORIENT_AUTO: number;
+    readonly SVG_MARKER_ORIENT_UNKNOWN: number;
+    readonly SVG_MARKERUNITS_STROKEWIDTH: number;
+    readonly SVG_MARKERUNITS_UNKNOWN: number;
+    readonly SVG_MARKERUNITS_USERSPACEONUSE: number;
+};
+
+interface SVGMaskElement extends SVGElement, SVGTests, SVGUnitTypes {
+    readonly height: SVGAnimatedLength;
+    readonly maskContentUnits: SVGAnimatedEnumeration;
+    readonly maskUnits: SVGAnimatedEnumeration;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGMaskElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGMaskElement: {
+    prototype: SVGMaskElement;
+    new(): SVGMaskElement;
+};
+
+interface SVGMatrix {
+    a: number;
+    b: number;
+    c: number;
+    d: number;
+    e: number;
+    f: number;
+    flipX(): SVGMatrix;
+    flipY(): SVGMatrix;
+    inverse(): SVGMatrix;
+    multiply(secondMatrix: SVGMatrix): SVGMatrix;
+    rotate(angle: number): SVGMatrix;
+    rotateFromVector(x: number, y: number): SVGMatrix;
+    scale(scaleFactor: number): SVGMatrix;
+    scaleNonUniform(scaleFactorX: number, scaleFactorY: number): SVGMatrix;
+    skewX(angle: number): SVGMatrix;
+    skewY(angle: number): SVGMatrix;
+    translate(x: number, y: number): SVGMatrix;
+}
+
+declare var SVGMatrix: {
+    prototype: SVGMatrix;
+    new(): SVGMatrix;
+};
+
+interface SVGMetadataElement extends SVGElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGMetadataElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGMetadataElement: {
+    prototype: SVGMetadataElement;
+    new(): SVGMetadataElement;
+};
+
+interface SVGNumber {
+    value: number;
+}
+
+declare var SVGNumber: {
+    prototype: SVGNumber;
+    new(): SVGNumber;
+};
+
+interface SVGNumberList {
+    readonly numberOfItems: number;
+    appendItem(newItem: SVGNumber): SVGNumber;
+    clear(): void;
+    getItem(index: number): SVGNumber;
+    initialize(newItem: SVGNumber): SVGNumber;
+    insertItemBefore(newItem: SVGNumber, index: number): SVGNumber;
+    removeItem(index: number): SVGNumber;
+    replaceItem(newItem: SVGNumber, index: number): SVGNumber;
+}
+
+declare var SVGNumberList: {
+    prototype: SVGNumberList;
+    new(): SVGNumberList;
+};
+
+interface SVGPathElement extends SVGGraphicsElement {
+    readonly pathSegList: SVGPathSegList;
+    createSVGPathSegArcAbs(x: number, y: number, r1: number, r2: number, angle: number, largeArcFlag: boolean, sweepFlag: boolean): SVGPathSegArcAbs;
+    createSVGPathSegArcRel(x: number, y: number, r1: number, r2: number, angle: number, largeArcFlag: boolean, sweepFlag: boolean): SVGPathSegArcRel;
+    createSVGPathSegClosePath(): SVGPathSegClosePath;
+    createSVGPathSegCurvetoCubicAbs(x: number, y: number, x1: number, y1: number, x2: number, y2: number): SVGPathSegCurvetoCubicAbs;
+    createSVGPathSegCurvetoCubicRel(x: number, y: number, x1: number, y1: number, x2: number, y2: number): SVGPathSegCurvetoCubicRel;
+    createSVGPathSegCurvetoCubicSmoothAbs(x: number, y: number, x2: number, y2: number): SVGPathSegCurvetoCubicSmoothAbs;
+    createSVGPathSegCurvetoCubicSmoothRel(x: number, y: number, x2: number, y2: number): SVGPathSegCurvetoCubicSmoothRel;
+    createSVGPathSegCurvetoQuadraticAbs(x: number, y: number, x1: number, y1: number): SVGPathSegCurvetoQuadraticAbs;
+    createSVGPathSegCurvetoQuadraticRel(x: number, y: number, x1: number, y1: number): SVGPathSegCurvetoQuadraticRel;
+    createSVGPathSegCurvetoQuadraticSmoothAbs(x: number, y: number): SVGPathSegCurvetoQuadraticSmoothAbs;
+    createSVGPathSegCurvetoQuadraticSmoothRel(x: number, y: number): SVGPathSegCurvetoQuadraticSmoothRel;
+    createSVGPathSegLinetoAbs(x: number, y: number): SVGPathSegLinetoAbs;
+    createSVGPathSegLinetoHorizontalAbs(x: number): SVGPathSegLinetoHorizontalAbs;
+    createSVGPathSegLinetoHorizontalRel(x: number): SVGPathSegLinetoHorizontalRel;
+    createSVGPathSegLinetoRel(x: number, y: number): SVGPathSegLinetoRel;
+    createSVGPathSegLinetoVerticalAbs(y: number): SVGPathSegLinetoVerticalAbs;
+    createSVGPathSegLinetoVerticalRel(y: number): SVGPathSegLinetoVerticalRel;
+    createSVGPathSegMovetoAbs(x: number, y: number): SVGPathSegMovetoAbs;
+    createSVGPathSegMovetoRel(x: number, y: number): SVGPathSegMovetoRel;
+    getPathSegAtLength(distance: number): number;
+    getPointAtLength(distance: number): SVGPoint;
+    getTotalLength(): number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGPathElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGPathElement: {
+    prototype: SVGPathElement;
+    new(): SVGPathElement;
+};
+
+interface SVGPathSeg {
+    readonly pathSegType: number;
+    readonly pathSegTypeAsLetter: string;
+    readonly PATHSEG_ARC_ABS: number;
+    readonly PATHSEG_ARC_REL: number;
+    readonly PATHSEG_CLOSEPATH: number;
+    readonly PATHSEG_CURVETO_CUBIC_ABS: number;
+    readonly PATHSEG_CURVETO_CUBIC_REL: number;
+    readonly PATHSEG_CURVETO_CUBIC_SMOOTH_ABS: number;
+    readonly PATHSEG_CURVETO_CUBIC_SMOOTH_REL: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_ABS: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_REL: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_SMOOTH_ABS: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_SMOOTH_REL: number;
+    readonly PATHSEG_LINETO_ABS: number;
+    readonly PATHSEG_LINETO_HORIZONTAL_ABS: number;
+    readonly PATHSEG_LINETO_HORIZONTAL_REL: number;
+    readonly PATHSEG_LINETO_REL: number;
+    readonly PATHSEG_LINETO_VERTICAL_ABS: number;
+    readonly PATHSEG_LINETO_VERTICAL_REL: number;
+    readonly PATHSEG_MOVETO_ABS: number;
+    readonly PATHSEG_MOVETO_REL: number;
+    readonly PATHSEG_UNKNOWN: number;
+}
+
+declare var SVGPathSeg: {
+    prototype: SVGPathSeg;
+    new(): SVGPathSeg;
+    readonly PATHSEG_ARC_ABS: number;
+    readonly PATHSEG_ARC_REL: number;
+    readonly PATHSEG_CLOSEPATH: number;
+    readonly PATHSEG_CURVETO_CUBIC_ABS: number;
+    readonly PATHSEG_CURVETO_CUBIC_REL: number;
+    readonly PATHSEG_CURVETO_CUBIC_SMOOTH_ABS: number;
+    readonly PATHSEG_CURVETO_CUBIC_SMOOTH_REL: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_ABS: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_REL: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_SMOOTH_ABS: number;
+    readonly PATHSEG_CURVETO_QUADRATIC_SMOOTH_REL: number;
+    readonly PATHSEG_LINETO_ABS: number;
+    readonly PATHSEG_LINETO_HORIZONTAL_ABS: number;
+    readonly PATHSEG_LINETO_HORIZONTAL_REL: number;
+    readonly PATHSEG_LINETO_REL: number;
+    readonly PATHSEG_LINETO_VERTICAL_ABS: number;
+    readonly PATHSEG_LINETO_VERTICAL_REL: number;
+    readonly PATHSEG_MOVETO_ABS: number;
+    readonly PATHSEG_MOVETO_REL: number;
+    readonly PATHSEG_UNKNOWN: number;
+};
+
+interface SVGPathSegArcAbs extends SVGPathSeg {
+    angle: number;
+    largeArcFlag: boolean;
+    r1: number;
+    r2: number;
+    sweepFlag: boolean;
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegArcAbs: {
+    prototype: SVGPathSegArcAbs;
+    new(): SVGPathSegArcAbs;
+};
+
+interface SVGPathSegArcRel extends SVGPathSeg {
+    angle: number;
+    largeArcFlag: boolean;
+    r1: number;
+    r2: number;
+    sweepFlag: boolean;
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegArcRel: {
+    prototype: SVGPathSegArcRel;
+    new(): SVGPathSegArcRel;
+};
+
+interface SVGPathSegClosePath extends SVGPathSeg {
+}
+
+declare var SVGPathSegClosePath: {
+    prototype: SVGPathSegClosePath;
+    new(): SVGPathSegClosePath;
+};
+
+interface SVGPathSegCurvetoCubicAbs extends SVGPathSeg {
+    x: number;
+    x1: number;
+    x2: number;
+    y: number;
+    y1: number;
+    y2: number;
+}
+
+declare var SVGPathSegCurvetoCubicAbs: {
+    prototype: SVGPathSegCurvetoCubicAbs;
+    new(): SVGPathSegCurvetoCubicAbs;
+};
+
+interface SVGPathSegCurvetoCubicRel extends SVGPathSeg {
+    x: number;
+    x1: number;
+    x2: number;
+    y: number;
+    y1: number;
+    y2: number;
+}
+
+declare var SVGPathSegCurvetoCubicRel: {
+    prototype: SVGPathSegCurvetoCubicRel;
+    new(): SVGPathSegCurvetoCubicRel;
+};
+
+interface SVGPathSegCurvetoCubicSmoothAbs extends SVGPathSeg {
+    x: number;
+    x2: number;
+    y: number;
+    y2: number;
+}
+
+declare var SVGPathSegCurvetoCubicSmoothAbs: {
+    prototype: SVGPathSegCurvetoCubicSmoothAbs;
+    new(): SVGPathSegCurvetoCubicSmoothAbs;
+};
+
+interface SVGPathSegCurvetoCubicSmoothRel extends SVGPathSeg {
+    x: number;
+    x2: number;
+    y: number;
+    y2: number;
+}
+
+declare var SVGPathSegCurvetoCubicSmoothRel: {
+    prototype: SVGPathSegCurvetoCubicSmoothRel;
+    new(): SVGPathSegCurvetoCubicSmoothRel;
+};
+
+interface SVGPathSegCurvetoQuadraticAbs extends SVGPathSeg {
+    x: number;
+    x1: number;
+    y: number;
+    y1: number;
+}
+
+declare var SVGPathSegCurvetoQuadraticAbs: {
+    prototype: SVGPathSegCurvetoQuadraticAbs;
+    new(): SVGPathSegCurvetoQuadraticAbs;
+};
+
+interface SVGPathSegCurvetoQuadraticRel extends SVGPathSeg {
+    x: number;
+    x1: number;
+    y: number;
+    y1: number;
+}
+
+declare var SVGPathSegCurvetoQuadraticRel: {
+    prototype: SVGPathSegCurvetoQuadraticRel;
+    new(): SVGPathSegCurvetoQuadraticRel;
+};
+
+interface SVGPathSegCurvetoQuadraticSmoothAbs extends SVGPathSeg {
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegCurvetoQuadraticSmoothAbs: {
+    prototype: SVGPathSegCurvetoQuadraticSmoothAbs;
+    new(): SVGPathSegCurvetoQuadraticSmoothAbs;
+};
+
+interface SVGPathSegCurvetoQuadraticSmoothRel extends SVGPathSeg {
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegCurvetoQuadraticSmoothRel: {
+    prototype: SVGPathSegCurvetoQuadraticSmoothRel;
+    new(): SVGPathSegCurvetoQuadraticSmoothRel;
+};
+
+interface SVGPathSegLinetoAbs extends SVGPathSeg {
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegLinetoAbs: {
+    prototype: SVGPathSegLinetoAbs;
+    new(): SVGPathSegLinetoAbs;
+};
+
+interface SVGPathSegLinetoHorizontalAbs extends SVGPathSeg {
+    x: number;
+}
+
+declare var SVGPathSegLinetoHorizontalAbs: {
+    prototype: SVGPathSegLinetoHorizontalAbs;
+    new(): SVGPathSegLinetoHorizontalAbs;
+};
+
+interface SVGPathSegLinetoHorizontalRel extends SVGPathSeg {
+    x: number;
+}
+
+declare var SVGPathSegLinetoHorizontalRel: {
+    prototype: SVGPathSegLinetoHorizontalRel;
+    new(): SVGPathSegLinetoHorizontalRel;
+};
+
+interface SVGPathSegLinetoRel extends SVGPathSeg {
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegLinetoRel: {
+    prototype: SVGPathSegLinetoRel;
+    new(): SVGPathSegLinetoRel;
+};
+
+interface SVGPathSegLinetoVerticalAbs extends SVGPathSeg {
+    y: number;
+}
+
+declare var SVGPathSegLinetoVerticalAbs: {
+    prototype: SVGPathSegLinetoVerticalAbs;
+    new(): SVGPathSegLinetoVerticalAbs;
+};
+
+interface SVGPathSegLinetoVerticalRel extends SVGPathSeg {
+    y: number;
+}
+
+declare var SVGPathSegLinetoVerticalRel: {
+    prototype: SVGPathSegLinetoVerticalRel;
+    new(): SVGPathSegLinetoVerticalRel;
+};
+
+interface SVGPathSegList {
+    readonly numberOfItems: number;
+    appendItem(newItem: SVGPathSeg): SVGPathSeg;
+    clear(): void;
+    getItem(index: number): SVGPathSeg;
+    initialize(newItem: SVGPathSeg): SVGPathSeg;
+    insertItemBefore(newItem: SVGPathSeg, index: number): SVGPathSeg;
+    removeItem(index: number): SVGPathSeg;
+    replaceItem(newItem: SVGPathSeg, index: number): SVGPathSeg;
+}
+
+declare var SVGPathSegList: {
+    prototype: SVGPathSegList;
+    new(): SVGPathSegList;
+};
+
+interface SVGPathSegMovetoAbs extends SVGPathSeg {
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegMovetoAbs: {
+    prototype: SVGPathSegMovetoAbs;
+    new(): SVGPathSegMovetoAbs;
+};
+
+interface SVGPathSegMovetoRel extends SVGPathSeg {
+    x: number;
+    y: number;
+}
+
+declare var SVGPathSegMovetoRel: {
+    prototype: SVGPathSegMovetoRel;
+    new(): SVGPathSegMovetoRel;
+};
+
+interface SVGPatternElement extends SVGElement, SVGTests, SVGUnitTypes, SVGFitToViewBox, SVGURIReference {
+    readonly height: SVGAnimatedLength;
+    readonly patternContentUnits: SVGAnimatedEnumeration;
+    readonly patternTransform: SVGAnimatedTransformList;
+    readonly patternUnits: SVGAnimatedEnumeration;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGPatternElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGPatternElement: {
+    prototype: SVGPatternElement;
+    new(): SVGPatternElement;
+};
+
+interface SVGPoint {
+    x: number;
+    y: number;
+    matrixTransform(matrix: SVGMatrix): SVGPoint;
+}
+
+declare var SVGPoint: {
+    prototype: SVGPoint;
+    new(): SVGPoint;
+};
+
+interface SVGPointList {
+    readonly numberOfItems: number;
+    appendItem(newItem: SVGPoint): SVGPoint;
+    clear(): void;
+    getItem(index: number): SVGPoint;
+    initialize(newItem: SVGPoint): SVGPoint;
+    insertItemBefore(newItem: SVGPoint, index: number): SVGPoint;
+    removeItem(index: number): SVGPoint;
+    replaceItem(newItem: SVGPoint, index: number): SVGPoint;
+}
+
+declare var SVGPointList: {
+    prototype: SVGPointList;
+    new(): SVGPointList;
+};
+
+interface SVGPolygonElement extends SVGGraphicsElement, SVGAnimatedPoints {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGPolygonElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGPolygonElement: {
+    prototype: SVGPolygonElement;
+    new(): SVGPolygonElement;
+};
+
+interface SVGPolylineElement extends SVGGraphicsElement, SVGAnimatedPoints {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGPolylineElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGPolylineElement: {
+    prototype: SVGPolylineElement;
+    new(): SVGPolylineElement;
+};
+
+interface SVGPreserveAspectRatio {
+    align: number;
+    meetOrSlice: number;
+    readonly SVG_MEETORSLICE_MEET: number;
+    readonly SVG_MEETORSLICE_SLICE: number;
+    readonly SVG_MEETORSLICE_UNKNOWN: number;
+    readonly SVG_PRESERVEASPECTRATIO_NONE: number;
+    readonly SVG_PRESERVEASPECTRATIO_UNKNOWN: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMAXYMAX: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMAXYMID: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMAXYMIN: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMIDYMAX: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMIDYMID: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMIDYMIN: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMINYMAX: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMINYMID: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMINYMIN: number;
+}
+
+declare var SVGPreserveAspectRatio: {
+    prototype: SVGPreserveAspectRatio;
+    new(): SVGPreserveAspectRatio;
+    readonly SVG_MEETORSLICE_MEET: number;
+    readonly SVG_MEETORSLICE_SLICE: number;
+    readonly SVG_MEETORSLICE_UNKNOWN: number;
+    readonly SVG_PRESERVEASPECTRATIO_NONE: number;
+    readonly SVG_PRESERVEASPECTRATIO_UNKNOWN: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMAXYMAX: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMAXYMID: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMAXYMIN: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMIDYMAX: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMIDYMID: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMIDYMIN: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMINYMAX: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMINYMID: number;
+    readonly SVG_PRESERVEASPECTRATIO_XMINYMIN: number;
+};
+
+interface SVGRadialGradientElement extends SVGGradientElement {
+    readonly cx: SVGAnimatedLength;
+    readonly cy: SVGAnimatedLength;
+    readonly fx: SVGAnimatedLength;
+    readonly fy: SVGAnimatedLength;
+    readonly r: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGRadialGradientElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGRadialGradientElement: {
+    prototype: SVGRadialGradientElement;
+    new(): SVGRadialGradientElement;
+};
+
+interface SVGRect {
+    height: number;
+    width: number;
+    x: number;
+    y: number;
+}
+
+declare var SVGRect: {
+    prototype: SVGRect;
+    new(): SVGRect;
+};
+
+interface SVGRectElement extends SVGGraphicsElement {
+    readonly height: SVGAnimatedLength;
+    readonly rx: SVGAnimatedLength;
+    readonly ry: SVGAnimatedLength;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGRectElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGRectElement: {
+    prototype: SVGRectElement;
+    new(): SVGRectElement;
+};
+
+interface SVGScriptElement extends SVGElement, SVGURIReference {
+    type: string;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGScriptElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGScriptElement: {
+    prototype: SVGScriptElement;
+    new(): SVGScriptElement;
+};
+
+interface SVGStopElement extends SVGElement {
+    readonly offset: SVGAnimatedNumber;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGStopElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGStopElement: {
+    prototype: SVGStopElement;
+    new(): SVGStopElement;
+};
+
+interface SVGStringList {
+    readonly numberOfItems: number;
+    appendItem(newItem: string): string;
+    clear(): void;
+    getItem(index: number): string;
+    initialize(newItem: string): string;
+    insertItemBefore(newItem: string, index: number): string;
+    removeItem(index: number): string;
+    replaceItem(newItem: string, index: number): string;
+}
+
+declare var SVGStringList: {
+    prototype: SVGStringList;
+    new(): SVGStringList;
+};
+
+interface SVGStyleElement extends SVGElement {
+    disabled: boolean;
+    media: string;
+    title: string;
+    type: string;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGStyleElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGStyleElement: {
+    prototype: SVGStyleElement;
+    new(): SVGStyleElement;
+};
+
+interface SVGSVGElementEventMap extends SVGElementEventMap {
+    "SVGAbort": Event;
+    "SVGError": Event;
+    "resize": UIEvent;
+    "scroll": UIEvent;
+    "SVGUnload": Event;
+    "SVGZoom": SVGZoomEvent;
+}
+
+interface SVGSVGElement extends SVGGraphicsElement, DocumentEvent, SVGFitToViewBox, SVGZoomAndPan {
+    contentScriptType: string;
+    contentStyleType: string;
+    currentScale: number;
+    readonly currentTranslate: SVGPoint;
+    readonly height: SVGAnimatedLength;
+    onabort: (this: SVGSVGElement, ev: Event) => any;
+    onerror: (this: SVGSVGElement, ev: Event) => any;
+    onresize: (this: SVGSVGElement, ev: UIEvent) => any;
+    onscroll: (this: SVGSVGElement, ev: UIEvent) => any;
+    onunload: (this: SVGSVGElement, ev: Event) => any;
+    onzoom: (this: SVGSVGElement, ev: SVGZoomEvent) => any;
+    readonly pixelUnitToMillimeterX: number;
+    readonly pixelUnitToMillimeterY: number;
+    readonly screenPixelToMillimeterX: number;
+    readonly screenPixelToMillimeterY: number;
+    readonly viewport: SVGRect;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+    checkEnclosure(element: SVGElement, rect: SVGRect): boolean;
+    checkIntersection(element: SVGElement, rect: SVGRect): boolean;
+    createSVGAngle(): SVGAngle;
+    createSVGLength(): SVGLength;
+    createSVGMatrix(): SVGMatrix;
+    createSVGNumber(): SVGNumber;
+    createSVGPoint(): SVGPoint;
+    createSVGRect(): SVGRect;
+    createSVGTransform(): SVGTransform;
+    createSVGTransformFromMatrix(matrix: SVGMatrix): SVGTransform;
+    deselectAll(): void;
+    forceRedraw(): void;
+    getComputedStyle(elt: Element, pseudoElt?: string): CSSStyleDeclaration;
+    getCurrentTime(): number;
+    getElementById(elementId: string): Element;
+    getEnclosureList(rect: SVGRect, referenceElement: SVGElement): NodeListOf<SVGCircleElement | SVGEllipseElement | SVGImageElement | SVGLineElement | SVGPathElement | SVGPolygonElement | SVGPolylineElement | SVGRectElement | SVGTextElement | SVGUseElement>;
+    getIntersectionList(rect: SVGRect, referenceElement: SVGElement): NodeListOf<SVGCircleElement | SVGEllipseElement | SVGImageElement | SVGLineElement | SVGPathElement | SVGPolygonElement | SVGPolylineElement | SVGRectElement | SVGTextElement | SVGUseElement>;
+    pauseAnimations(): void;
+    setCurrentTime(seconds: number): void;
+    suspendRedraw(maxWaitMilliseconds: number): number;
+    unpauseAnimations(): void;
+    unsuspendRedraw(suspendHandleID: number): void;
+    unsuspendRedrawAll(): void;
+    addEventListener<K extends keyof SVGSVGElementEventMap>(type: K, listener: (this: SVGSVGElement, ev: SVGSVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGSVGElement: {
+    prototype: SVGSVGElement;
+    new(): SVGSVGElement;
+};
+
+interface SVGSwitchElement extends SVGGraphicsElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGSwitchElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGSwitchElement: {
+    prototype: SVGSwitchElement;
+    new(): SVGSwitchElement;
+};
+
+interface SVGSymbolElement extends SVGElement, SVGFitToViewBox {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGSymbolElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGSymbolElement: {
+    prototype: SVGSymbolElement;
+    new(): SVGSymbolElement;
+};
+
+interface SVGTextContentElement extends SVGGraphicsElement {
+    readonly lengthAdjust: SVGAnimatedEnumeration;
+    readonly textLength: SVGAnimatedLength;
+    getCharNumAtPosition(point: SVGPoint): number;
+    getComputedTextLength(): number;
+    getEndPositionOfChar(charnum: number): SVGPoint;
+    getExtentOfChar(charnum: number): SVGRect;
+    getNumberOfChars(): number;
+    getRotationOfChar(charnum: number): number;
+    getStartPositionOfChar(charnum: number): SVGPoint;
+    getSubStringLength(charnum: number, nchars: number): number;
+    selectSubString(charnum: number, nchars: number): void;
+    readonly LENGTHADJUST_SPACING: number;
+    readonly LENGTHADJUST_SPACINGANDGLYPHS: number;
+    readonly LENGTHADJUST_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGTextContentElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGTextContentElement: {
+    prototype: SVGTextContentElement;
+    new(): SVGTextContentElement;
+    readonly LENGTHADJUST_SPACING: number;
+    readonly LENGTHADJUST_SPACINGANDGLYPHS: number;
+    readonly LENGTHADJUST_UNKNOWN: number;
+};
+
+interface SVGTextElement extends SVGTextPositioningElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGTextElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGTextElement: {
+    prototype: SVGTextElement;
+    new(): SVGTextElement;
+};
+
+interface SVGTextPathElement extends SVGTextContentElement, SVGURIReference {
+    readonly method: SVGAnimatedEnumeration;
+    readonly spacing: SVGAnimatedEnumeration;
+    readonly startOffset: SVGAnimatedLength;
+    readonly TEXTPATH_METHODTYPE_ALIGN: number;
+    readonly TEXTPATH_METHODTYPE_STRETCH: number;
+    readonly TEXTPATH_METHODTYPE_UNKNOWN: number;
+    readonly TEXTPATH_SPACINGTYPE_AUTO: number;
+    readonly TEXTPATH_SPACINGTYPE_EXACT: number;
+    readonly TEXTPATH_SPACINGTYPE_UNKNOWN: number;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGTextPathElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGTextPathElement: {
+    prototype: SVGTextPathElement;
+    new(): SVGTextPathElement;
+    readonly TEXTPATH_METHODTYPE_ALIGN: number;
+    readonly TEXTPATH_METHODTYPE_STRETCH: number;
+    readonly TEXTPATH_METHODTYPE_UNKNOWN: number;
+    readonly TEXTPATH_SPACINGTYPE_AUTO: number;
+    readonly TEXTPATH_SPACINGTYPE_EXACT: number;
+    readonly TEXTPATH_SPACINGTYPE_UNKNOWN: number;
+};
+
+interface SVGTextPositioningElement extends SVGTextContentElement {
+    readonly dx: SVGAnimatedLengthList;
+    readonly dy: SVGAnimatedLengthList;
+    readonly rotate: SVGAnimatedNumberList;
+    readonly x: SVGAnimatedLengthList;
+    readonly y: SVGAnimatedLengthList;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGTextPositioningElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGTextPositioningElement: {
+    prototype: SVGTextPositioningElement;
+    new(): SVGTextPositioningElement;
+};
+
+interface SVGTitleElement extends SVGElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGTitleElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGTitleElement: {
+    prototype: SVGTitleElement;
+    new(): SVGTitleElement;
+};
+
+interface SVGTransform {
+    readonly angle: number;
+    readonly matrix: SVGMatrix;
+    readonly type: number;
+    setMatrix(matrix: SVGMatrix): void;
+    setRotate(angle: number, cx: number, cy: number): void;
+    setScale(sx: number, sy: number): void;
+    setSkewX(angle: number): void;
+    setSkewY(angle: number): void;
+    setTranslate(tx: number, ty: number): void;
+    readonly SVG_TRANSFORM_MATRIX: number;
+    readonly SVG_TRANSFORM_ROTATE: number;
+    readonly SVG_TRANSFORM_SCALE: number;
+    readonly SVG_TRANSFORM_SKEWX: number;
+    readonly SVG_TRANSFORM_SKEWY: number;
+    readonly SVG_TRANSFORM_TRANSLATE: number;
+    readonly SVG_TRANSFORM_UNKNOWN: number;
+}
+
+declare var SVGTransform: {
+    prototype: SVGTransform;
+    new(): SVGTransform;
+    readonly SVG_TRANSFORM_MATRIX: number;
+    readonly SVG_TRANSFORM_ROTATE: number;
+    readonly SVG_TRANSFORM_SCALE: number;
+    readonly SVG_TRANSFORM_SKEWX: number;
+    readonly SVG_TRANSFORM_SKEWY: number;
+    readonly SVG_TRANSFORM_TRANSLATE: number;
+    readonly SVG_TRANSFORM_UNKNOWN: number;
+};
+
+interface SVGTransformList {
+    readonly numberOfItems: number;
+    appendItem(newItem: SVGTransform): SVGTransform;
+    clear(): void;
+    consolidate(): SVGTransform;
+    createSVGTransformFromMatrix(matrix: SVGMatrix): SVGTransform;
+    getItem(index: number): SVGTransform;
+    initialize(newItem: SVGTransform): SVGTransform;
+    insertItemBefore(newItem: SVGTransform, index: number): SVGTransform;
+    removeItem(index: number): SVGTransform;
+    replaceItem(newItem: SVGTransform, index: number): SVGTransform;
+}
+
+declare var SVGTransformList: {
+    prototype: SVGTransformList;
+    new(): SVGTransformList;
+};
+
+interface SVGTSpanElement extends SVGTextPositioningElement {
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGTSpanElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGTSpanElement: {
+    prototype: SVGTSpanElement;
+    new(): SVGTSpanElement;
+};
+
+interface SVGUnitTypes {
+    readonly SVG_UNIT_TYPE_OBJECTBOUNDINGBOX: number;
+    readonly SVG_UNIT_TYPE_UNKNOWN: number;
+    readonly SVG_UNIT_TYPE_USERSPACEONUSE: number;
+}
+declare var SVGUnitTypes: SVGUnitTypes;
+
+interface SVGUseElement extends SVGGraphicsElement, SVGURIReference {
+    readonly animatedInstanceRoot: SVGElementInstance;
+    readonly height: SVGAnimatedLength;
+    readonly instanceRoot: SVGElementInstance;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGUseElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGUseElement: {
+    prototype: SVGUseElement;
+    new(): SVGUseElement;
+};
+
+interface SVGViewElement extends SVGElement, SVGZoomAndPan, SVGFitToViewBox {
+    readonly viewTarget: SVGStringList;
+    addEventListener<K extends keyof SVGElementEventMap>(type: K, listener: (this: SVGViewElement, ev: SVGElementEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var SVGViewElement: {
+    prototype: SVGViewElement;
+    new(): SVGViewElement;
+};
+
+interface SVGZoomAndPan {
+    readonly zoomAndPan: number;
+}
+
+declare var SVGZoomAndPan: {
+    readonly SVG_ZOOMANDPAN_DISABLE: number;
+    readonly SVG_ZOOMANDPAN_MAGNIFY: number;
+    readonly SVG_ZOOMANDPAN_UNKNOWN: number;
+};
+
+interface SVGZoomEvent extends UIEvent {
+    readonly newScale: number;
+    readonly newTranslate: SVGPoint;
+    readonly previousScale: number;
+    readonly previousTranslate: SVGPoint;
+    readonly zoomRectScreen: SVGRect;
+}
+
+declare var SVGZoomEvent: {
+    prototype: SVGZoomEvent;
+    new(): SVGZoomEvent;
+};
+
+interface SyncManager {
+    getTags(): any;
+    register(tag: string): Promise<void>;
+}
+
+declare var SyncManager: {
+    prototype: SyncManager;
+    new(): SyncManager;
+};
+
+interface Text extends CharacterData {
+    readonly wholeText: string;
+    readonly assignedSlot: HTMLSlotElement | null;
+    splitText(offset: number): Text;
+}
+
+declare var Text: {
+    prototype: Text;
+    new(data?: string): Text;
+};
+
+interface TextEvent extends UIEvent {
+    readonly data: string;
+    readonly inputMethod: number;
+    readonly locale: string;
+    initTextEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, dataArg: string, inputMethod: number, locale: string): void;
+    readonly DOM_INPUT_METHOD_DROP: number;
+    readonly DOM_INPUT_METHOD_HANDWRITING: number;
+    readonly DOM_INPUT_METHOD_IME: number;
+    readonly DOM_INPUT_METHOD_KEYBOARD: number;
+    readonly DOM_INPUT_METHOD_MULTIMODAL: number;
+    readonly DOM_INPUT_METHOD_OPTION: number;
+    readonly DOM_INPUT_METHOD_PASTE: number;
+    readonly DOM_INPUT_METHOD_SCRIPT: number;
+    readonly DOM_INPUT_METHOD_UNKNOWN: number;
+    readonly DOM_INPUT_METHOD_VOICE: number;
+}
+
+declare var TextEvent: {
+    prototype: TextEvent;
+    new(): TextEvent;
+    readonly DOM_INPUT_METHOD_DROP: number;
+    readonly DOM_INPUT_METHOD_HANDWRITING: number;
+    readonly DOM_INPUT_METHOD_IME: number;
+    readonly DOM_INPUT_METHOD_KEYBOARD: number;
+    readonly DOM_INPUT_METHOD_MULTIMODAL: number;
+    readonly DOM_INPUT_METHOD_OPTION: number;
+    readonly DOM_INPUT_METHOD_PASTE: number;
+    readonly DOM_INPUT_METHOD_SCRIPT: number;
+    readonly DOM_INPUT_METHOD_UNKNOWN: number;
+    readonly DOM_INPUT_METHOD_VOICE: number;
+};
+
+interface TextMetrics {
+    readonly width: number;
+}
+
+declare var TextMetrics: {
+    prototype: TextMetrics;
+    new(): TextMetrics;
+};
+
+interface TextTrackEventMap {
+    "cuechange": Event;
+    "error": Event;
+    "load": Event;
+}
+
+interface TextTrack extends EventTarget {
+    readonly activeCues: TextTrackCueList;
+    readonly cues: TextTrackCueList;
+    readonly inBandMetadataTrackDispatchType: string;
+    readonly kind: string;
+    readonly label: string;
+    readonly language: string;
+    mode: any;
+    oncuechange: (this: TextTrack, ev: Event) => any;
+    onerror: (this: TextTrack, ev: Event) => any;
+    onload: (this: TextTrack, ev: Event) => any;
+    readonly readyState: number;
+    addCue(cue: TextTrackCue): void;
+    removeCue(cue: TextTrackCue): void;
+    readonly DISABLED: number;
+    readonly ERROR: number;
+    readonly HIDDEN: number;
+    readonly LOADED: number;
+    readonly LOADING: number;
+    readonly NONE: number;
+    readonly SHOWING: number;
+    addEventListener<K extends keyof TextTrackEventMap>(type: K, listener: (this: TextTrack, ev: TextTrackEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var TextTrack: {
+    prototype: TextTrack;
+    new(): TextTrack;
+    readonly DISABLED: number;
+    readonly ERROR: number;
+    readonly HIDDEN: number;
+    readonly LOADED: number;
+    readonly LOADING: number;
+    readonly NONE: number;
+    readonly SHOWING: number;
+};
+
+interface TextTrackCueEventMap {
+    "enter": Event;
+    "exit": Event;
+}
+
+interface TextTrackCue extends EventTarget {
+    endTime: number;
+    id: string;
+    onenter: (this: TextTrackCue, ev: Event) => any;
+    onexit: (this: TextTrackCue, ev: Event) => any;
+    pauseOnExit: boolean;
+    startTime: number;
+    text: string;
+    readonly track: TextTrack;
+    getCueAsHTML(): DocumentFragment;
+    addEventListener<K extends keyof TextTrackCueEventMap>(type: K, listener: (this: TextTrackCue, ev: TextTrackCueEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var TextTrackCue: {
+    prototype: TextTrackCue;
+    new(startTime: number, endTime: number, text: string): TextTrackCue;
+};
+
+interface TextTrackCueList {
+    readonly length: number;
+    getCueById(id: string): TextTrackCue;
+    item(index: number): TextTrackCue;
+    [index: number]: TextTrackCue;
+}
+
+declare var TextTrackCueList: {
+    prototype: TextTrackCueList;
+    new(): TextTrackCueList;
+};
+
+interface TextTrackListEventMap {
+    "addtrack": TrackEvent;
+}
+
+interface TextTrackList extends EventTarget {
+    readonly length: number;
+    onaddtrack: ((this: TextTrackList, ev: TrackEvent) => any) | null;
+    item(index: number): TextTrack;
+    addEventListener<K extends keyof TextTrackListEventMap>(type: K, listener: (this: TextTrackList, ev: TextTrackListEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+    [index: number]: TextTrack;
+}
+
+declare var TextTrackList: {
+    prototype: TextTrackList;
+    new(): TextTrackList;
+};
+
+interface TimeRanges {
+    readonly length: number;
+    end(index: number): number;
+    start(index: number): number;
+}
+
+declare var TimeRanges: {
+    prototype: TimeRanges;
+    new(): TimeRanges;
+};
+
+interface Touch {
+    readonly clientX: number;
+    readonly clientY: number;
+    readonly identifier: number;
+    readonly pageX: number;
+    readonly pageY: number;
+    readonly screenX: number;
+    readonly screenY: number;
+    readonly target: EventTarget;
+}
+
+declare var Touch: {
+    prototype: Touch;
+    new(): Touch;
+};
+
+interface TouchEvent extends UIEvent {
+    readonly altKey: boolean;
+    readonly changedTouches: TouchList;
+    readonly charCode: number;
+    readonly ctrlKey: boolean;
+    readonly keyCode: number;
+    readonly metaKey: boolean;
+    readonly shiftKey: boolean;
+    readonly targetTouches: TouchList;
+    readonly touches: TouchList;
+    readonly which: number;
+}
+
+declare var TouchEvent: {
+    prototype: TouchEvent;
+    new(type: string, touchEventInit?: TouchEventInit): TouchEvent;
+};
+
+interface TouchList {
+    readonly length: number;
+    item(index: number): Touch | null;
+    [index: number]: Touch;
+}
+
+declare var TouchList: {
+    prototype: TouchList;
+    new(): TouchList;
+};
+
+interface TrackEvent extends Event {
+    readonly track: VideoTrack | AudioTrack | TextTrack | null;
+}
+
+declare var TrackEvent: {
+    prototype: TrackEvent;
+    new(typeArg: string, eventInitDict?: TrackEventInit): TrackEvent;
+};
+
+interface TransitionEvent extends Event {
+    readonly elapsedTime: number;
+    readonly propertyName: string;
+    initTransitionEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, propertyNameArg: string, elapsedTimeArg: number): void;
+}
+
+declare var TransitionEvent: {
+    prototype: TransitionEvent;
+    new(typeArg: string, eventInitDict?: TransitionEventInit): TransitionEvent;
+};
+
+interface TreeWalker {
+    currentNode: Node;
+    readonly expandEntityReferences: boolean;
+    readonly filter: NodeFilter;
+    readonly root: Node;
+    readonly whatToShow: number;
+    firstChild(): Node;
+    lastChild(): Node;
+    nextNode(): Node;
+    nextSibling(): Node;
+    parentNode(): Node;
+    previousNode(): Node;
+    previousSibling(): Node;
+}
+
+declare var TreeWalker: {
+    prototype: TreeWalker;
+    new(): TreeWalker;
+};
+
+interface UIEvent extends Event {
+    readonly detail: number;
+    readonly view: Window;
+    initUIEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number): void;
+}
+
+declare var UIEvent: {
+    prototype: UIEvent;
+    new(typeArg: string, eventInitDict?: UIEventInit): UIEvent;
+};
+
+interface UnviewableContentIdentifiedEvent extends NavigationEventWithReferrer {
+    readonly mediaType: string;
+}
+
+declare var UnviewableContentIdentifiedEvent: {
+    prototype: UnviewableContentIdentifiedEvent;
+    new(): UnviewableContentIdentifiedEvent;
+};
+
+interface URL {
+    hash: string;
+    host: string;
+    hostname: string;
+    href: string;
+    readonly origin: string;
+    password: string;
+    pathname: string;
+    port: string;
+    protocol: string;
+    search: string;
+    username: string;
+    readonly searchParams: URLSearchParams;
+    toString(): string;
+}
+
+declare var URL: {
+    prototype: URL;
+    new(url: string, base?: string): URL;
+    createObjectURL(object: any, options?: ObjectURLOptions): string;
+    revokeObjectURL(url: string): void;
+};
+
+interface ValidityState {
+    readonly badInput: boolean;
+    readonly customError: boolean;
+    readonly patternMismatch: boolean;
+    readonly rangeOverflow: boolean;
+    readonly rangeUnderflow: boolean;
+    readonly stepMismatch: boolean;
+    readonly tooLong: boolean;
+    readonly typeMismatch: boolean;
+    readonly valid: boolean;
+    readonly valueMissing: boolean;
+}
+
+declare var ValidityState: {
+    prototype: ValidityState;
+    new(): ValidityState;
+};
+
+interface VideoPlaybackQuality {
+    readonly corruptedVideoFrames: number;
+    readonly creationTime: number;
+    readonly droppedVideoFrames: number;
+    readonly totalFrameDelay: number;
+    readonly totalVideoFrames: number;
+}
+
+declare var VideoPlaybackQuality: {
+    prototype: VideoPlaybackQuality;
+    new(): VideoPlaybackQuality;
+};
+
+interface VideoTrack {
+    readonly id: string;
+    kind: string;
+    readonly label: string;
+    language: string;
+    selected: boolean;
+    readonly sourceBuffer: SourceBuffer;
+}
+
+declare var VideoTrack: {
+    prototype: VideoTrack;
+    new(): VideoTrack;
+};
+
+interface VideoTrackListEventMap {
+    "addtrack": TrackEvent;
+    "change": Event;
+    "removetrack": TrackEvent;
+}
+
+interface VideoTrackList extends EventTarget {
+    readonly length: number;
+    onaddtrack: (this: VideoTrackList, ev: TrackEvent) => any;
+    onchange: (this: VideoTrackList, ev: Event) => any;
+    onremovetrack: (this: VideoTrackList, ev: TrackEvent) => any;
+    readonly selectedIndex: number;
+    getTrackById(id: string): VideoTrack | null;
+    item(index: number): VideoTrack;
+    addEventListener<K extends keyof VideoTrackListEventMap>(type: K, listener: (this: VideoTrackList, ev: VideoTrackListEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+    [index: number]: VideoTrack;
+}
+
+declare var VideoTrackList: {
+    prototype: VideoTrackList;
+    new(): VideoTrackList;
+};
+
+interface WaveShaperNode extends AudioNode {
+    curve: Float32Array | null;
+    oversample: OverSampleType;
+}
+
+declare var WaveShaperNode: {
+    prototype: WaveShaperNode;
+    new(): WaveShaperNode;
+};
+
+interface WebAuthentication {
+    getAssertion(assertionChallenge: any, options?: AssertionOptions): Promise<WebAuthnAssertion>;
+    makeCredential(accountInformation: Account, cryptoParameters: ScopedCredentialParameters[], attestationChallenge: any, options?: ScopedCredentialOptions): Promise<ScopedCredentialInfo>;
+}
+
+declare var WebAuthentication: {
+    prototype: WebAuthentication;
+    new(): WebAuthentication;
+};
+
+interface WebAuthnAssertion {
+    readonly authenticatorData: ArrayBuffer;
+    readonly clientData: ArrayBuffer;
+    readonly credential: ScopedCredential;
+    readonly signature: ArrayBuffer;
+}
+
+declare var WebAuthnAssertion: {
+    prototype: WebAuthnAssertion;
+    new(): WebAuthnAssertion;
+};
+
+interface WEBGL_compressed_texture_s3tc {
+    readonly COMPRESSED_RGB_S3TC_DXT1_EXT: number;
+    readonly COMPRESSED_RGBA_S3TC_DXT1_EXT: number;
+    readonly COMPRESSED_RGBA_S3TC_DXT3_EXT: number;
+    readonly COMPRESSED_RGBA_S3TC_DXT5_EXT: number;
+}
+
+declare var WEBGL_compressed_texture_s3tc: {
+    prototype: WEBGL_compressed_texture_s3tc;
+    new(): WEBGL_compressed_texture_s3tc;
+    readonly COMPRESSED_RGB_S3TC_DXT1_EXT: number;
+    readonly COMPRESSED_RGBA_S3TC_DXT1_EXT: number;
+    readonly COMPRESSED_RGBA_S3TC_DXT3_EXT: number;
+    readonly COMPRESSED_RGBA_S3TC_DXT5_EXT: number;
+};
+
+interface WEBGL_debug_renderer_info {
+    readonly UNMASKED_RENDERER_WEBGL: number;
+    readonly UNMASKED_VENDOR_WEBGL: number;
+}
+
+declare var WEBGL_debug_renderer_info: {
+    prototype: WEBGL_debug_renderer_info;
+    new(): WEBGL_debug_renderer_info;
+    readonly UNMASKED_RENDERER_WEBGL: number;
+    readonly UNMASKED_VENDOR_WEBGL: number;
+};
+
+interface WEBGL_depth_texture {
+    readonly UNSIGNED_INT_24_8_WEBGL: number;
+}
+
+declare var WEBGL_depth_texture: {
+    prototype: WEBGL_depth_texture;
+    new(): WEBGL_depth_texture;
+    readonly UNSIGNED_INT_24_8_WEBGL: number;
+};
+
+interface WebGLActiveInfo {
+    readonly name: string;
+    readonly size: number;
+    readonly type: number;
+}
+
+declare var WebGLActiveInfo: {
+    prototype: WebGLActiveInfo;
+    new(): WebGLActiveInfo;
+};
+
+interface WebGLBuffer extends WebGLObject {
+}
+
+declare var WebGLBuffer: {
+    prototype: WebGLBuffer;
+    new(): WebGLBuffer;
+};
+
+interface WebGLContextEvent extends Event {
+    readonly statusMessage: string;
+}
+
+declare var WebGLContextEvent: {
+    prototype: WebGLContextEvent;
+    new(typeArg: string, eventInitDict?: WebGLContextEventInit): WebGLContextEvent;
+};
+
+interface WebGLFramebuffer extends WebGLObject {
+}
+
+declare var WebGLFramebuffer: {
+    prototype: WebGLFramebuffer;
+    new(): WebGLFramebuffer;
+};
+
+interface WebGLObject {
+}
+
+declare var WebGLObject: {
+    prototype: WebGLObject;
+    new(): WebGLObject;
+};
+
+interface WebGLProgram extends WebGLObject {
+}
+
+declare var WebGLProgram: {
+    prototype: WebGLProgram;
+    new(): WebGLProgram;
+};
+
+interface WebGLRenderbuffer extends WebGLObject {
+}
+
+declare var WebGLRenderbuffer: {
+    prototype: WebGLRenderbuffer;
+    new(): WebGLRenderbuffer;
+};
+
+interface WebGLRenderingContext {
+    readonly canvas: HTMLCanvasElement;
+    readonly drawingBufferHeight: number;
+    readonly drawingBufferWidth: number;
+    activeTexture(texture: number): void;
+    attachShader(program: WebGLProgram | null, shader: WebGLShader | null): void;
+    bindAttribLocation(program: WebGLProgram | null, index: number, name: string): void;
+    bindBuffer(target: number, buffer: WebGLBuffer | null): void;
+    bindFramebuffer(target: number, framebuffer: WebGLFramebuffer | null): void;
+    bindRenderbuffer(target: number, renderbuffer: WebGLRenderbuffer | null): void;
+    bindTexture(target: number, texture: WebGLTexture | null): void;
+    blendColor(red: number, green: number, blue: number, alpha: number): void;
+    blendEquation(mode: number): void;
+    blendEquationSeparate(modeRGB: number, modeAlpha: number): void;
+    blendFunc(sfactor: number, dfactor: number): void;
+    blendFuncSeparate(srcRGB: number, dstRGB: number, srcAlpha: number, dstAlpha: number): void;
+    bufferData(target: number, size: number | ArrayBufferView | ArrayBuffer, usage: number): void;
+    bufferSubData(target: number, offset: number, data: ArrayBufferView | ArrayBuffer): void;
+    checkFramebufferStatus(target: number): number;
+    clear(mask: number): void;
+    clearColor(red: number, green: number, blue: number, alpha: number): void;
+    clearDepth(depth: number): void;
+    clearStencil(s: number): void;
+    colorMask(red: boolean, green: boolean, blue: boolean, alpha: boolean): void;
+    compileShader(shader: WebGLShader | null): void;
+    compressedTexImage2D(target: number, level: number, internalformat: number, width: number, height: number, border: number, data: ArrayBufferView): void;
+    compressedTexSubImage2D(target: number, level: number, xoffset: number, yoffset: number, width: number, height: number, format: number, data: ArrayBufferView): void;
+    copyTexImage2D(target: number, level: number, internalformat: number, x: number, y: number, width: number, height: number, border: number): void;
+    copyTexSubImage2D(target: number, level: number, xoffset: number, yoffset: number, x: number, y: number, width: number, height: number): void;
+    createBuffer(): WebGLBuffer | null;
+    createFramebuffer(): WebGLFramebuffer | null;
+    createProgram(): WebGLProgram | null;
+    createRenderbuffer(): WebGLRenderbuffer | null;
+    createShader(type: number): WebGLShader | null;
+    createTexture(): WebGLTexture | null;
+    cullFace(mode: number): void;
+    deleteBuffer(buffer: WebGLBuffer | null): void;
+    deleteFramebuffer(framebuffer: WebGLFramebuffer | null): void;
+    deleteProgram(program: WebGLProgram | null): void;
+    deleteRenderbuffer(renderbuffer: WebGLRenderbuffer | null): void;
+    deleteShader(shader: WebGLShader | null): void;
+    deleteTexture(texture: WebGLTexture | null): void;
+    depthFunc(func: number): void;
+    depthMask(flag: boolean): void;
+    depthRange(zNear: number, zFar: number): void;
+    detachShader(program: WebGLProgram | null, shader: WebGLShader | null): void;
+    disable(cap: number): void;
+    disableVertexAttribArray(index: number): void;
+    drawArrays(mode: number, first: number, count: number): void;
+    drawElements(mode: number, count: number, type: number, offset: number): void;
+    enable(cap: number): void;
+    enableVertexAttribArray(index: number): void;
+    finish(): void;
+    flush(): void;
+    framebufferRenderbuffer(target: number, attachment: number, renderbuffertarget: number, renderbuffer: WebGLRenderbuffer | null): void;
+    framebufferTexture2D(target: number, attachment: number, textarget: number, texture: WebGLTexture | null, level: number): void;
+    frontFace(mode: number): void;
+    generateMipmap(target: number): void;
+    getActiveAttrib(program: WebGLProgram | null, index: number): WebGLActiveInfo | null;
+    getActiveUniform(program: WebGLProgram | null, index: number): WebGLActiveInfo | null;
+    getAttachedShaders(program: WebGLProgram | null): WebGLShader[] | null;
+    getAttribLocation(program: WebGLProgram | null, name: string): number;
+    getBufferParameter(target: number, pname: number): any;
+    getContextAttributes(): WebGLContextAttributes;
+    getError(): number;
+    getExtension(name: string): any;
+    getFramebufferAttachmentParameter(target: number, attachment: number, pname: number): any;
+    getParameter(pname: number): any;
+    getProgramInfoLog(program: WebGLProgram | null): string | null;
+    getProgramParameter(program: WebGLProgram | null, pname: number): any;
+    getRenderbufferParameter(target: number, pname: number): any;
+    getShaderInfoLog(shader: WebGLShader | null): string | null;
+    getShaderParameter(shader: WebGLShader | null, pname: number): any;
+    getShaderPrecisionFormat(shadertype: number, precisiontype: number): WebGLShaderPrecisionFormat | null;
+    getShaderSource(shader: WebGLShader | null): string | null;
+    getSupportedExtensions(): string[] | null;
+    getTexParameter(target: number, pname: number): any;
+    getUniform(program: WebGLProgram | null, location: WebGLUniformLocation | null): any;
+    getUniformLocation(program: WebGLProgram | null, name: string): WebGLUniformLocation | null;
+    getVertexAttrib(index: number, pname: number): any;
+    getVertexAttribOffset(index: number, pname: number): number;
+    hint(target: number, mode: number): void;
+    isBuffer(buffer: WebGLBuffer | null): boolean;
+    isContextLost(): boolean;
+    isEnabled(cap: number): boolean;
+    isFramebuffer(framebuffer: WebGLFramebuffer | null): boolean;
+    isProgram(program: WebGLProgram | null): boolean;
+    isRenderbuffer(renderbuffer: WebGLRenderbuffer | null): boolean;
+    isShader(shader: WebGLShader | null): boolean;
+    isTexture(texture: WebGLTexture | null): boolean;
+    lineWidth(width: number): void;
+    linkProgram(program: WebGLProgram | null): void;
+    pixelStorei(pname: number, param: number | boolean): void;
+    polygonOffset(factor: number, units: number): void;
+    readPixels(x: number, y: number, width: number, height: number, format: number, type: number, pixels: ArrayBufferView | null): void;
+    renderbufferStorage(target: number, internalformat: number, width: number, height: number): void;
+    sampleCoverage(value: number, invert: boolean): void;
+    scissor(x: number, y: number, width: number, height: number): void;
+    shaderSource(shader: WebGLShader | null, source: string): void;
+    stencilFunc(func: number, ref: number, mask: number): void;
+    stencilFuncSeparate(face: number, func: number, ref: number, mask: number): void;
+    stencilMask(mask: number): void;
+    stencilMaskSeparate(face: number, mask: number): void;
+    stencilOp(fail: number, zfail: number, zpass: number): void;
+    stencilOpSeparate(face: number, fail: number, zfail: number, zpass: number): void;
+    texImage2D(target: number, level: number, internalformat: number, width: number, height: number, border: number, format: number, type: number, pixels: ArrayBufferView | null): void;
+    texImage2D(target: number, level: number, internalformat: number, format: number, type: number, pixels: ImageBitmap | ImageData | HTMLVideoElement | HTMLImageElement | HTMLCanvasElement): void;
+    texParameterf(target: number, pname: number, param: number): void;
+    texParameteri(target: number, pname: number, param: number): void;
+    texSubImage2D(target: number, level: number, xoffset: number, yoffset: number, width: number, height: number, format: number, type: number, pixels: ArrayBufferView | null): void;
+    texSubImage2D(target: number, level: number, xoffset: number, yoffset: number, format: number, type: number, pixels: ImageBitmap | ImageData | HTMLVideoElement | HTMLImageElement | HTMLCanvasElement): void;
+    uniform1f(location: WebGLUniformLocation | null, x: number): void;
+    uniform1fv(location: WebGLUniformLocation, v: Float32Array | number[]): void;
+    uniform1i(location: WebGLUniformLocation | null, x: number): void;
+    uniform1iv(location: WebGLUniformLocation, v: Int32Array | number[]): void;
+    uniform2f(location: WebGLUniformLocation | null, x: number, y: number): void;
+    uniform2fv(location: WebGLUniformLocation, v: Float32Array | number[]): void;
+    uniform2i(location: WebGLUniformLocation | null, x: number, y: number): void;
+    uniform2iv(location: WebGLUniformLocation, v: Int32Array | number[]): void;
+    uniform3f(location: WebGLUniformLocation | null, x: number, y: number, z: number): void;
+    uniform3fv(location: WebGLUniformLocation, v: Float32Array | number[]): void;
+    uniform3i(location: WebGLUniformLocation | null, x: number, y: number, z: number): void;
+    uniform3iv(location: WebGLUniformLocation, v: Int32Array | number[]): void;
+    uniform4f(location: WebGLUniformLocation | null, x: number, y: number, z: number, w: number): void;
+    uniform4fv(location: WebGLUniformLocation, v: Float32Array | number[]): void;
+    uniform4i(location: WebGLUniformLocation | null, x: number, y: number, z: number, w: number): void;
+    uniform4iv(location: WebGLUniformLocation, v: Int32Array | number[]): void;
+    uniformMatrix2fv(location: WebGLUniformLocation, transpose: boolean, value: Float32Array | number[]): void;
+    uniformMatrix3fv(location: WebGLUniformLocation, transpose: boolean, value: Float32Array | number[]): void;
+    uniformMatrix4fv(location: WebGLUniformLocation, transpose: boolean, value: Float32Array | number[]): void;
+    useProgram(program: WebGLProgram | null): void;
+    validateProgram(program: WebGLProgram | null): void;
+    vertexAttrib1f(indx: number, x: number): void;
+    vertexAttrib1fv(indx: number, values: Float32Array | number[]): void;
+    vertexAttrib2f(indx: number, x: number, y: number): void;
+    vertexAttrib2fv(indx: number, values: Float32Array | number[]): void;
+    vertexAttrib3f(indx: number, x: number, y: number, z: number): void;
+    vertexAttrib3fv(indx: number, values: Float32Array | number[]): void;
+    vertexAttrib4f(indx: number, x: number, y: number, z: number, w: number): void;
+    vertexAttrib4fv(indx: number, values: Float32Array | number[]): void;
+    vertexAttribPointer(indx: number, size: number, type: number, normalized: boolean, stride: number, offset: number): void;
+    viewport(x: number, y: number, width: number, height: number): void;
+    readonly ACTIVE_ATTRIBUTES: number;
+    readonly ACTIVE_TEXTURE: number;
+    readonly ACTIVE_UNIFORMS: number;
+    readonly ALIASED_LINE_WIDTH_RANGE: number;
+    readonly ALIASED_POINT_SIZE_RANGE: number;
+    readonly ALPHA: number;
+    readonly ALPHA_BITS: number;
+    readonly ALWAYS: number;
+    readonly ARRAY_BUFFER: number;
+    readonly ARRAY_BUFFER_BINDING: number;
+    readonly ATTACHED_SHADERS: number;
+    readonly BACK: number;
+    readonly BLEND: number;
+    readonly BLEND_COLOR: number;
+    readonly BLEND_DST_ALPHA: number;
+    readonly BLEND_DST_RGB: number;
+    readonly BLEND_EQUATION: number;
+    readonly BLEND_EQUATION_ALPHA: number;
+    readonly BLEND_EQUATION_RGB: number;
+    readonly BLEND_SRC_ALPHA: number;
+    readonly BLEND_SRC_RGB: number;
+    readonly BLUE_BITS: number;
+    readonly BOOL: number;
+    readonly BOOL_VEC2: number;
+    readonly BOOL_VEC3: number;
+    readonly BOOL_VEC4: number;
+    readonly BROWSER_DEFAULT_WEBGL: number;
+    readonly BUFFER_SIZE: number;
+    readonly BUFFER_USAGE: number;
+    readonly BYTE: number;
+    readonly CCW: number;
+    readonly CLAMP_TO_EDGE: number;
+    readonly COLOR_ATTACHMENT0: number;
+    readonly COLOR_BUFFER_BIT: number;
+    readonly COLOR_CLEAR_VALUE: number;
+    readonly COLOR_WRITEMASK: number;
+    readonly COMPILE_STATUS: number;
+    readonly COMPRESSED_TEXTURE_FORMATS: number;
+    readonly CONSTANT_ALPHA: number;
+    readonly CONSTANT_COLOR: number;
+    readonly CONTEXT_LOST_WEBGL: number;
+    readonly CULL_FACE: number;
+    readonly CULL_FACE_MODE: number;
+    readonly CURRENT_PROGRAM: number;
+    readonly CURRENT_VERTEX_ATTRIB: number;
+    readonly CW: number;
+    readonly DECR: number;
+    readonly DECR_WRAP: number;
+    readonly DELETE_STATUS: number;
+    readonly DEPTH_ATTACHMENT: number;
+    readonly DEPTH_BITS: number;
+    readonly DEPTH_BUFFER_BIT: number;
+    readonly DEPTH_CLEAR_VALUE: number;
+    readonly DEPTH_COMPONENT: number;
+    readonly DEPTH_COMPONENT16: number;
+    readonly DEPTH_FUNC: number;
+    readonly DEPTH_RANGE: number;
+    readonly DEPTH_STENCIL: number;
+    readonly DEPTH_STENCIL_ATTACHMENT: number;
+    readonly DEPTH_TEST: number;
+    readonly DEPTH_WRITEMASK: number;
+    readonly DITHER: number;
+    readonly DONT_CARE: number;
+    readonly DST_ALPHA: number;
+    readonly DST_COLOR: number;
+    readonly DYNAMIC_DRAW: number;
+    readonly ELEMENT_ARRAY_BUFFER: number;
+    readonly ELEMENT_ARRAY_BUFFER_BINDING: number;
+    readonly EQUAL: number;
+    readonly FASTEST: number;
+    readonly FLOAT: number;
+    readonly FLOAT_MAT2: number;
+    readonly FLOAT_MAT3: number;
+    readonly FLOAT_MAT4: number;
+    readonly FLOAT_VEC2: number;
+    readonly FLOAT_VEC3: number;
+    readonly FLOAT_VEC4: number;
+    readonly FRAGMENT_SHADER: number;
+    readonly FRAMEBUFFER: number;
+    readonly FRAMEBUFFER_ATTACHMENT_OBJECT_NAME: number;
+    readonly FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE: number;
+    readonly FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE: number;
+    readonly FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL: number;
+    readonly FRAMEBUFFER_BINDING: number;
+    readonly FRAMEBUFFER_COMPLETE: number;
+    readonly FRAMEBUFFER_INCOMPLETE_ATTACHMENT: number;
+    readonly FRAMEBUFFER_INCOMPLETE_DIMENSIONS: number;
+    readonly FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT: number;
+    readonly FRAMEBUFFER_UNSUPPORTED: number;
+    readonly FRONT: number;
+    readonly FRONT_AND_BACK: number;
+    readonly FRONT_FACE: number;
+    readonly FUNC_ADD: number;
+    readonly FUNC_REVERSE_SUBTRACT: number;
+    readonly FUNC_SUBTRACT: number;
+    readonly GENERATE_MIPMAP_HINT: number;
+    readonly GEQUAL: number;
+    readonly GREATER: number;
+    readonly GREEN_BITS: number;
+    readonly HIGH_FLOAT: number;
+    readonly HIGH_INT: number;
+    readonly IMPLEMENTATION_COLOR_READ_FORMAT: number;
+    readonly IMPLEMENTATION_COLOR_READ_TYPE: number;
+    readonly INCR: number;
+    readonly INCR_WRAP: number;
+    readonly INT: number;
+    readonly INT_VEC2: number;
+    readonly INT_VEC3: number;
+    readonly INT_VEC4: number;
+    readonly INVALID_ENUM: number;
+    readonly INVALID_FRAMEBUFFER_OPERATION: number;
+    readonly INVALID_OPERATION: number;
+    readonly INVALID_VALUE: number;
+    readonly INVERT: number;
+    readonly KEEP: number;
+    readonly LEQUAL: number;
+    readonly LESS: number;
+    readonly LINE_LOOP: number;
+    readonly LINE_STRIP: number;
+    readonly LINE_WIDTH: number;
+    readonly LINEAR: number;
+    readonly LINEAR_MIPMAP_LINEAR: number;
+    readonly LINEAR_MIPMAP_NEAREST: number;
+    readonly LINES: number;
+    readonly LINK_STATUS: number;
+    readonly LOW_FLOAT: number;
+    readonly LOW_INT: number;
+    readonly LUMINANCE: number;
+    readonly LUMINANCE_ALPHA: number;
+    readonly MAX_COMBINED_TEXTURE_IMAGE_UNITS: number;
+    readonly MAX_CUBE_MAP_TEXTURE_SIZE: number;
+    readonly MAX_FRAGMENT_UNIFORM_VECTORS: number;
+    readonly MAX_RENDERBUFFER_SIZE: number;
+    readonly MAX_TEXTURE_IMAGE_UNITS: number;
+    readonly MAX_TEXTURE_SIZE: number;
+    readonly MAX_VARYING_VECTORS: number;
+    readonly MAX_VERTEX_ATTRIBS: number;
+    readonly MAX_VERTEX_TEXTURE_IMAGE_UNITS: number;
+    readonly MAX_VERTEX_UNIFORM_VECTORS: number;
+    readonly MAX_VIEWPORT_DIMS: number;
+    readonly MEDIUM_FLOAT: number;
+    readonly MEDIUM_INT: number;
+    readonly MIRRORED_REPEAT: number;
+    readonly NEAREST: number;
+    readonly NEAREST_MIPMAP_LINEAR: number;
+    readonly NEAREST_MIPMAP_NEAREST: number;
+    readonly NEVER: number;
+    readonly NICEST: number;
+    readonly NO_ERROR: number;
+    readonly NONE: number;
+    readonly NOTEQUAL: number;
+    readonly ONE: number;
+    readonly ONE_MINUS_CONSTANT_ALPHA: number;
+    readonly ONE_MINUS_CONSTANT_COLOR: number;
+    readonly ONE_MINUS_DST_ALPHA: number;
+    readonly ONE_MINUS_DST_COLOR: number;
+    readonly ONE_MINUS_SRC_ALPHA: number;
+    readonly ONE_MINUS_SRC_COLOR: number;
+    readonly OUT_OF_MEMORY: number;
+    readonly PACK_ALIGNMENT: number;
+    readonly POINTS: number;
+    readonly POLYGON_OFFSET_FACTOR: number;
+    readonly POLYGON_OFFSET_FILL: number;
+    readonly POLYGON_OFFSET_UNITS: number;
+    readonly RED_BITS: number;
+    readonly RENDERBUFFER: number;
+    readonly RENDERBUFFER_ALPHA_SIZE: number;
+    readonly RENDERBUFFER_BINDING: number;
+    readonly RENDERBUFFER_BLUE_SIZE: number;
+    readonly RENDERBUFFER_DEPTH_SIZE: number;
+    readonly RENDERBUFFER_GREEN_SIZE: number;
+    readonly RENDERBUFFER_HEIGHT: number;
+    readonly RENDERBUFFER_INTERNAL_FORMAT: number;
+    readonly RENDERBUFFER_RED_SIZE: number;
+    readonly RENDERBUFFER_STENCIL_SIZE: number;
+    readonly RENDERBUFFER_WIDTH: number;
+    readonly RENDERER: number;
+    readonly REPEAT: number;
+    readonly REPLACE: number;
+    readonly RGB: number;
+    readonly RGB5_A1: number;
+    readonly RGB565: number;
+    readonly RGBA: number;
+    readonly RGBA4: number;
+    readonly SAMPLE_ALPHA_TO_COVERAGE: number;
+    readonly SAMPLE_BUFFERS: number;
+    readonly SAMPLE_COVERAGE: number;
+    readonly SAMPLE_COVERAGE_INVERT: number;
+    readonly SAMPLE_COVERAGE_VALUE: number;
+    readonly SAMPLER_2D: number;
+    readonly SAMPLER_CUBE: number;
+    readonly SAMPLES: number;
+    readonly SCISSOR_BOX: number;
+    readonly SCISSOR_TEST: number;
+    readonly SHADER_TYPE: number;
+    readonly SHADING_LANGUAGE_VERSION: number;
+    readonly SHORT: number;
+    readonly SRC_ALPHA: number;
+    readonly SRC_ALPHA_SATURATE: number;
+    readonly SRC_COLOR: number;
+    readonly STATIC_DRAW: number;
+    readonly STENCIL_ATTACHMENT: number;
+    readonly STENCIL_BACK_FAIL: number;
+    readonly STENCIL_BACK_FUNC: number;
+    readonly STENCIL_BACK_PASS_DEPTH_FAIL: number;
+    readonly STENCIL_BACK_PASS_DEPTH_PASS: number;
+    readonly STENCIL_BACK_REF: number;
+    readonly STENCIL_BACK_VALUE_MASK: number;
+    readonly STENCIL_BACK_WRITEMASK: number;
+    readonly STENCIL_BITS: number;
+    readonly STENCIL_BUFFER_BIT: number;
+    readonly STENCIL_CLEAR_VALUE: number;
+    readonly STENCIL_FAIL: number;
+    readonly STENCIL_FUNC: number;
+    readonly STENCIL_INDEX: number;
+    readonly STENCIL_INDEX8: number;
+    readonly STENCIL_PASS_DEPTH_FAIL: number;
+    readonly STENCIL_PASS_DEPTH_PASS: number;
+    readonly STENCIL_REF: number;
+    readonly STENCIL_TEST: number;
+    readonly STENCIL_VALUE_MASK: number;
+    readonly STENCIL_WRITEMASK: number;
+    readonly STREAM_DRAW: number;
+    readonly SUBPIXEL_BITS: number;
+    readonly TEXTURE: number;
+    readonly TEXTURE_2D: number;
+    readonly TEXTURE_BINDING_2D: number;
+    readonly TEXTURE_BINDING_CUBE_MAP: number;
+    readonly TEXTURE_CUBE_MAP: number;
+    readonly TEXTURE_CUBE_MAP_NEGATIVE_X: number;
+    readonly TEXTURE_CUBE_MAP_NEGATIVE_Y: number;
+    readonly TEXTURE_CUBE_MAP_NEGATIVE_Z: number;
+    readonly TEXTURE_CUBE_MAP_POSITIVE_X: number;
+    readonly TEXTURE_CUBE_MAP_POSITIVE_Y: number;
+    readonly TEXTURE_CUBE_MAP_POSITIVE_Z: number;
+    readonly TEXTURE_MAG_FILTER: number;
+    readonly TEXTURE_MIN_FILTER: number;
+    readonly TEXTURE_WRAP_S: number;
+    readonly TEXTURE_WRAP_T: number;
+    readonly TEXTURE0: number;
+    readonly TEXTURE1: number;
+    readonly TEXTURE10: number;
+    readonly TEXTURE11: number;
+    readonly TEXTURE12: number;
+    readonly TEXTURE13: number;
+    readonly TEXTURE14: number;
+    readonly TEXTURE15: number;
+    readonly TEXTURE16: number;
+    readonly TEXTURE17: number;
+    readonly TEXTURE18: number;
+    readonly TEXTURE19: number;
+    readonly TEXTURE2: number;
+    readonly TEXTURE20: number;
+    readonly TEXTURE21: number;
+    readonly TEXTURE22: number;
+    readonly TEXTURE23: number;
+    readonly TEXTURE24: number;
+    readonly TEXTURE25: number;
+    readonly TEXTURE26: number;
+    readonly TEXTURE27: number;
+    readonly TEXTURE28: number;
+    readonly TEXTURE29: number;
+    readonly TEXTURE3: number;
+    readonly TEXTURE30: number;
+    readonly TEXTURE31: number;
+    readonly TEXTURE4: number;
+    readonly TEXTURE5: number;
+    readonly TEXTURE6: number;
+    readonly TEXTURE7: number;
+    readonly TEXTURE8: number;
+    readonly TEXTURE9: number;
+    readonly TRIANGLE_FAN: number;
+    readonly TRIANGLE_STRIP: number;
+    readonly TRIANGLES: number;
+    readonly UNPACK_ALIGNMENT: number;
+    readonly UNPACK_COLORSPACE_CONVERSION_WEBGL: number;
+    readonly UNPACK_FLIP_Y_WEBGL: number;
+    readonly UNPACK_PREMULTIPLY_ALPHA_WEBGL: number;
+    readonly UNSIGNED_BYTE: number;
+    readonly UNSIGNED_INT: number;
+    readonly UNSIGNED_SHORT: number;
+    readonly UNSIGNED_SHORT_4_4_4_4: number;
+    readonly UNSIGNED_SHORT_5_5_5_1: number;
+    readonly UNSIGNED_SHORT_5_6_5: number;
+    readonly VALIDATE_STATUS: number;
+    readonly VENDOR: number;
+    readonly VERSION: number;
+    readonly VERTEX_ATTRIB_ARRAY_BUFFER_BINDING: number;
+    readonly VERTEX_ATTRIB_ARRAY_ENABLED: number;
+    readonly VERTEX_ATTRIB_ARRAY_NORMALIZED: number;
+    readonly VERTEX_ATTRIB_ARRAY_POINTER: number;
+    readonly VERTEX_ATTRIB_ARRAY_SIZE: number;
+    readonly VERTEX_ATTRIB_ARRAY_STRIDE: number;
+    readonly VERTEX_ATTRIB_ARRAY_TYPE: number;
+    readonly VERTEX_SHADER: number;
+    readonly VIEWPORT: number;
+    readonly ZERO: number;
+}
+
+declare var WebGLRenderingContext: {
+    prototype: WebGLRenderingContext;
+    new(): WebGLRenderingContext;
+    readonly ACTIVE_ATTRIBUTES: number;
+    readonly ACTIVE_TEXTURE: number;
+    readonly ACTIVE_UNIFORMS: number;
+    readonly ALIASED_LINE_WIDTH_RANGE: number;
+    readonly ALIASED_POINT_SIZE_RANGE: number;
+    readonly ALPHA: number;
+    readonly ALPHA_BITS: number;
+    readonly ALWAYS: number;
+    readonly ARRAY_BUFFER: number;
+    readonly ARRAY_BUFFER_BINDING: number;
+    readonly ATTACHED_SHADERS: number;
+    readonly BACK: number;
+    readonly BLEND: number;
+    readonly BLEND_COLOR: number;
+    readonly BLEND_DST_ALPHA: number;
+    readonly BLEND_DST_RGB: number;
+    readonly BLEND_EQUATION: number;
+    readonly BLEND_EQUATION_ALPHA: number;
+    readonly BLEND_EQUATION_RGB: number;
+    readonly BLEND_SRC_ALPHA: number;
+    readonly BLEND_SRC_RGB: number;
+    readonly BLUE_BITS: number;
+    readonly BOOL: number;
+    readonly BOOL_VEC2: number;
+    readonly BOOL_VEC3: number;
+    readonly BOOL_VEC4: number;
+    readonly BROWSER_DEFAULT_WEBGL: number;
+    readonly BUFFER_SIZE: number;
+    readonly BUFFER_USAGE: number;
+    readonly BYTE: number;
+    readonly CCW: number;
+    readonly CLAMP_TO_EDGE: number;
+    readonly COLOR_ATTACHMENT0: number;
+    readonly COLOR_BUFFER_BIT: number;
+    readonly COLOR_CLEAR_VALUE: number;
+    readonly COLOR_WRITEMASK: number;
+    readonly COMPILE_STATUS: number;
+    readonly COMPRESSED_TEXTURE_FORMATS: number;
+    readonly CONSTANT_ALPHA: number;
+    readonly CONSTANT_COLOR: number;
+    readonly CONTEXT_LOST_WEBGL: number;
+    readonly CULL_FACE: number;
+    readonly CULL_FACE_MODE: number;
+    readonly CURRENT_PROGRAM: number;
+    readonly CURRENT_VERTEX_ATTRIB: number;
+    readonly CW: number;
+    readonly DECR: number;
+    readonly DECR_WRAP: number;
+    readonly DELETE_STATUS: number;
+    readonly DEPTH_ATTACHMENT: number;
+    readonly DEPTH_BITS: number;
+    readonly DEPTH_BUFFER_BIT: number;
+    readonly DEPTH_CLEAR_VALUE: number;
+    readonly DEPTH_COMPONENT: number;
+    readonly DEPTH_COMPONENT16: number;
+    readonly DEPTH_FUNC: number;
+    readonly DEPTH_RANGE: number;
+    readonly DEPTH_STENCIL: number;
+    readonly DEPTH_STENCIL_ATTACHMENT: number;
+    readonly DEPTH_TEST: number;
+    readonly DEPTH_WRITEMASK: number;
+    readonly DITHER: number;
+    readonly DONT_CARE: number;
+    readonly DST_ALPHA: number;
+    readonly DST_COLOR: number;
+    readonly DYNAMIC_DRAW: number;
+    readonly ELEMENT_ARRAY_BUFFER: number;
+    readonly ELEMENT_ARRAY_BUFFER_BINDING: number;
+    readonly EQUAL: number;
+    readonly FASTEST: number;
+    readonly FLOAT: number;
+    readonly FLOAT_MAT2: number;
+    readonly FLOAT_MAT3: number;
+    readonly FLOAT_MAT4: number;
+    readonly FLOAT_VEC2: number;
+    readonly FLOAT_VEC3: number;
+    readonly FLOAT_VEC4: number;
+    readonly FRAGMENT_SHADER: number;
+    readonly FRAMEBUFFER: number;
+    readonly FRAMEBUFFER_ATTACHMENT_OBJECT_NAME: number;
+    readonly FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE: number;
+    readonly FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE: number;
+    readonly FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL: number;
+    readonly FRAMEBUFFER_BINDING: number;
+    readonly FRAMEBUFFER_COMPLETE: number;
+    readonly FRAMEBUFFER_INCOMPLETE_ATTACHMENT: number;
+    readonly FRAMEBUFFER_INCOMPLETE_DIMENSIONS: number;
+    readonly FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT: number;
+    readonly FRAMEBUFFER_UNSUPPORTED: number;
+    readonly FRONT: number;
+    readonly FRONT_AND_BACK: number;
+    readonly FRONT_FACE: number;
+    readonly FUNC_ADD: number;
+    readonly FUNC_REVERSE_SUBTRACT: number;
+    readonly FUNC_SUBTRACT: number;
+    readonly GENERATE_MIPMAP_HINT: number;
+    readonly GEQUAL: number;
+    readonly GREATER: number;
+    readonly GREEN_BITS: number;
+    readonly HIGH_FLOAT: number;
+    readonly HIGH_INT: number;
+    readonly IMPLEMENTATION_COLOR_READ_FORMAT: number;
+    readonly IMPLEMENTATION_COLOR_READ_TYPE: number;
+    readonly INCR: number;
+    readonly INCR_WRAP: number;
+    readonly INT: number;
+    readonly INT_VEC2: number;
+    readonly INT_VEC3: number;
+    readonly INT_VEC4: number;
+    readonly INVALID_ENUM: number;
+    readonly INVALID_FRAMEBUFFER_OPERATION: number;
+    readonly INVALID_OPERATION: number;
+    readonly INVALID_VALUE: number;
+    readonly INVERT: number;
+    readonly KEEP: number;
+    readonly LEQUAL: number;
+    readonly LESS: number;
+    readonly LINE_LOOP: number;
+    readonly LINE_STRIP: number;
+    readonly LINE_WIDTH: number;
+    readonly LINEAR: number;
+    readonly LINEAR_MIPMAP_LINEAR: number;
+    readonly LINEAR_MIPMAP_NEAREST: number;
+    readonly LINES: number;
+    readonly LINK_STATUS: number;
+    readonly LOW_FLOAT: number;
+    readonly LOW_INT: number;
+    readonly LUMINANCE: number;
+    readonly LUMINANCE_ALPHA: number;
+    readonly MAX_COMBINED_TEXTURE_IMAGE_UNITS: number;
+    readonly MAX_CUBE_MAP_TEXTURE_SIZE: number;
+    readonly MAX_FRAGMENT_UNIFORM_VECTORS: number;
+    readonly MAX_RENDERBUFFER_SIZE: number;
+    readonly MAX_TEXTURE_IMAGE_UNITS: number;
+    readonly MAX_TEXTURE_SIZE: number;
+    readonly MAX_VARYING_VECTORS: number;
+    readonly MAX_VERTEX_ATTRIBS: number;
+    readonly MAX_VERTEX_TEXTURE_IMAGE_UNITS: number;
+    readonly MAX_VERTEX_UNIFORM_VECTORS: number;
+    readonly MAX_VIEWPORT_DIMS: number;
+    readonly MEDIUM_FLOAT: number;
+    readonly MEDIUM_INT: number;
+    readonly MIRRORED_REPEAT: number;
+    readonly NEAREST: number;
+    readonly NEAREST_MIPMAP_LINEAR: number;
+    readonly NEAREST_MIPMAP_NEAREST: number;
+    readonly NEVER: number;
+    readonly NICEST: number;
+    readonly NO_ERROR: number;
+    readonly NONE: number;
+    readonly NOTEQUAL: number;
+    readonly ONE: number;
+    readonly ONE_MINUS_CONSTANT_ALPHA: number;
+    readonly ONE_MINUS_CONSTANT_COLOR: number;
+    readonly ONE_MINUS_DST_ALPHA: number;
+    readonly ONE_MINUS_DST_COLOR: number;
+    readonly ONE_MINUS_SRC_ALPHA: number;
+    readonly ONE_MINUS_SRC_COLOR: number;
+    readonly OUT_OF_MEMORY: number;
+    readonly PACK_ALIGNMENT: number;
+    readonly POINTS: number;
+    readonly POLYGON_OFFSET_FACTOR: number;
+    readonly POLYGON_OFFSET_FILL: number;
+    readonly POLYGON_OFFSET_UNITS: number;
+    readonly RED_BITS: number;
+    readonly RENDERBUFFER: number;
+    readonly RENDERBUFFER_ALPHA_SIZE: number;
+    readonly RENDERBUFFER_BINDING: number;
+    readonly RENDERBUFFER_BLUE_SIZE: number;
+    readonly RENDERBUFFER_DEPTH_SIZE: number;
+    readonly RENDERBUFFER_GREEN_SIZE: number;
+    readonly RENDERBUFFER_HEIGHT: number;
+    readonly RENDERBUFFER_INTERNAL_FORMAT: number;
+    readonly RENDERBUFFER_RED_SIZE: number;
+    readonly RENDERBUFFER_STENCIL_SIZE: number;
+    readonly RENDERBUFFER_WIDTH: number;
+    readonly RENDERER: number;
+    readonly REPEAT: number;
+    readonly REPLACE: number;
+    readonly RGB: number;
+    readonly RGB5_A1: number;
+    readonly RGB565: number;
+    readonly RGBA: number;
+    readonly RGBA4: number;
+    readonly SAMPLE_ALPHA_TO_COVERAGE: number;
+    readonly SAMPLE_BUFFERS: number;
+    readonly SAMPLE_COVERAGE: number;
+    readonly SAMPLE_COVERAGE_INVERT: number;
+    readonly SAMPLE_COVERAGE_VALUE: number;
+    readonly SAMPLER_2D: number;
+    readonly SAMPLER_CUBE: number;
+    readonly SAMPLES: number;
+    readonly SCISSOR_BOX: number;
+    readonly SCISSOR_TEST: number;
+    readonly SHADER_TYPE: number;
+    readonly SHADING_LANGUAGE_VERSION: number;
+    readonly SHORT: number;
+    readonly SRC_ALPHA: number;
+    readonly SRC_ALPHA_SATURATE: number;
+    readonly SRC_COLOR: number;
+    readonly STATIC_DRAW: number;
+    readonly STENCIL_ATTACHMENT: number;
+    readonly STENCIL_BACK_FAIL: number;
+    readonly STENCIL_BACK_FUNC: number;
+    readonly STENCIL_BACK_PASS_DEPTH_FAIL: number;
+    readonly STENCIL_BACK_PASS_DEPTH_PASS: number;
+    readonly STENCIL_BACK_REF: number;
+    readonly STENCIL_BACK_VALUE_MASK: number;
+    readonly STENCIL_BACK_WRITEMASK: number;
+    readonly STENCIL_BITS: number;
+    readonly STENCIL_BUFFER_BIT: number;
+    readonly STENCIL_CLEAR_VALUE: number;
+    readonly STENCIL_FAIL: number;
+    readonly STENCIL_FUNC: number;
+    readonly STENCIL_INDEX: number;
+    readonly STENCIL_INDEX8: number;
+    readonly STENCIL_PASS_DEPTH_FAIL: number;
+    readonly STENCIL_PASS_DEPTH_PASS: number;
+    readonly STENCIL_REF: number;
+    readonly STENCIL_TEST: number;
+    readonly STENCIL_VALUE_MASK: number;
+    readonly STENCIL_WRITEMASK: number;
+    readonly STREAM_DRAW: number;
+    readonly SUBPIXEL_BITS: number;
+    readonly TEXTURE: number;
+    readonly TEXTURE_2D: number;
+    readonly TEXTURE_BINDING_2D: number;
+    readonly TEXTURE_BINDING_CUBE_MAP: number;
+    readonly TEXTURE_CUBE_MAP: number;
+    readonly TEXTURE_CUBE_MAP_NEGATIVE_X: number;
+    readonly TEXTURE_CUBE_MAP_NEGATIVE_Y: number;
+    readonly TEXTURE_CUBE_MAP_NEGATIVE_Z: number;
+    readonly TEXTURE_CUBE_MAP_POSITIVE_X: number;
+    readonly TEXTURE_CUBE_MAP_POSITIVE_Y: number;
+    readonly TEXTURE_CUBE_MAP_POSITIVE_Z: number;
+    readonly TEXTURE_MAG_FILTER: number;
+    readonly TEXTURE_MIN_FILTER: number;
+    readonly TEXTURE_WRAP_S: number;
+    readonly TEXTURE_WRAP_T: number;
+    readonly TEXTURE0: number;
+    readonly TEXTURE1: number;
+    readonly TEXTURE10: number;
+    readonly TEXTURE11: number;
+    readonly TEXTURE12: number;
+    readonly TEXTURE13: number;
+    readonly TEXTURE14: number;
+    readonly TEXTURE15: number;
+    readonly TEXTURE16: number;
+    readonly TEXTURE17: number;
+    readonly TEXTURE18: number;
+    readonly TEXTURE19: number;
+    readonly TEXTURE2: number;
+    readonly TEXTURE20: number;
+    readonly TEXTURE21: number;
+    readonly TEXTURE22: number;
+    readonly TEXTURE23: number;
+    readonly TEXTURE24: number;
+    readonly TEXTURE25: number;
+    readonly TEXTURE26: number;
+    readonly TEXTURE27: number;
+    readonly TEXTURE28: number;
+    readonly TEXTURE29: number;
+    readonly TEXTURE3: number;
+    readonly TEXTURE30: number;
+    readonly TEXTURE31: number;
+    readonly TEXTURE4: number;
+    readonly TEXTURE5: number;
+    readonly TEXTURE6: number;
+    readonly TEXTURE7: number;
+    readonly TEXTURE8: number;
+    readonly TEXTURE9: number;
+    readonly TRIANGLE_FAN: number;
+    readonly TRIANGLE_STRIP: number;
+    readonly TRIANGLES: number;
+    readonly UNPACK_ALIGNMENT: number;
+    readonly UNPACK_COLORSPACE_CONVERSION_WEBGL: number;
+    readonly UNPACK_FLIP_Y_WEBGL: number;
+    readonly UNPACK_PREMULTIPLY_ALPHA_WEBGL: number;
+    readonly UNSIGNED_BYTE: number;
+    readonly UNSIGNED_INT: number;
+    readonly UNSIGNED_SHORT: number;
+    readonly UNSIGNED_SHORT_4_4_4_4: number;
+    readonly UNSIGNED_SHORT_5_5_5_1: number;
+    readonly UNSIGNED_SHORT_5_6_5: number;
+    readonly VALIDATE_STATUS: number;
+    readonly VENDOR: number;
+    readonly VERSION: number;
+    readonly VERTEX_ATTRIB_ARRAY_BUFFER_BINDING: number;
+    readonly VERTEX_ATTRIB_ARRAY_ENABLED: number;
+    readonly VERTEX_ATTRIB_ARRAY_NORMALIZED: number;
+    readonly VERTEX_ATTRIB_ARRAY_POINTER: number;
+    readonly VERTEX_ATTRIB_ARRAY_SIZE: number;
+    readonly VERTEX_ATTRIB_ARRAY_STRIDE: number;
+    readonly VERTEX_ATTRIB_ARRAY_TYPE: number;
+    readonly VERTEX_SHADER: number;
+    readonly VIEWPORT: number;
+    readonly ZERO: number;
+};
+
+interface WebGLShader extends WebGLObject {
+}
+
+declare var WebGLShader: {
+    prototype: WebGLShader;
+    new(): WebGLShader;
+};
+
+interface WebGLShaderPrecisionFormat {
+    readonly precision: number;
+    readonly rangeMax: number;
+    readonly rangeMin: number;
+}
+
+declare var WebGLShaderPrecisionFormat: {
+    prototype: WebGLShaderPrecisionFormat;
+    new(): WebGLShaderPrecisionFormat;
+};
+
+interface WebGLTexture extends WebGLObject {
+}
+
+declare var WebGLTexture: {
+    prototype: WebGLTexture;
+    new(): WebGLTexture;
+};
+
+interface WebGLUniformLocation {
+}
+
+declare var WebGLUniformLocation: {
+    prototype: WebGLUniformLocation;
+    new(): WebGLUniformLocation;
+};
+
+interface WebKitCSSMatrix {
+    a: number;
+    b: number;
+    c: number;
+    d: number;
+    e: number;
+    f: number;
+    m11: number;
+    m12: number;
+    m13: number;
+    m14: number;
+    m21: number;
+    m22: number;
+    m23: number;
+    m24: number;
+    m31: number;
+    m32: number;
+    m33: number;
+    m34: number;
+    m41: number;
+    m42: number;
+    m43: number;
+    m44: number;
+    inverse(): WebKitCSSMatrix;
+    multiply(secondMatrix: WebKitCSSMatrix): WebKitCSSMatrix;
+    rotate(angleX: number, angleY?: number, angleZ?: number): WebKitCSSMatrix;
+    rotateAxisAngle(x: number, y: number, z: number, angle: number): WebKitCSSMatrix;
+    scale(scaleX: number, scaleY?: number, scaleZ?: number): WebKitCSSMatrix;
+    setMatrixValue(value: string): void;
+    skewX(angle: number): WebKitCSSMatrix;
+    skewY(angle: number): WebKitCSSMatrix;
+    toString(): string;
+    translate(x: number, y: number, z?: number): WebKitCSSMatrix;
+}
+
+declare var WebKitCSSMatrix: {
+    prototype: WebKitCSSMatrix;
+    new(text?: string): WebKitCSSMatrix;
+};
+
+interface WebKitDirectoryEntry extends WebKitEntry {
+    createReader(): WebKitDirectoryReader;
+}
+
+declare var WebKitDirectoryEntry: {
+    prototype: WebKitDirectoryEntry;
+    new(): WebKitDirectoryEntry;
+};
+
+interface WebKitDirectoryReader {
+    readEntries(successCallback: WebKitEntriesCallback, errorCallback?: WebKitErrorCallback): void;
+}
+
+declare var WebKitDirectoryReader: {
+    prototype: WebKitDirectoryReader;
+    new(): WebKitDirectoryReader;
+};
+
+interface WebKitEntry {
+    readonly filesystem: WebKitFileSystem;
+    readonly fullPath: string;
+    readonly isDirectory: boolean;
+    readonly isFile: boolean;
+    readonly name: string;
+}
+
+declare var WebKitEntry: {
+    prototype: WebKitEntry;
+    new(): WebKitEntry;
+};
+
+interface WebKitFileEntry extends WebKitEntry {
+    file(successCallback: WebKitFileCallback, errorCallback?: WebKitErrorCallback): void;
+}
+
+declare var WebKitFileEntry: {
+    prototype: WebKitFileEntry;
+    new(): WebKitFileEntry;
+};
+
+interface WebKitFileSystem {
+    readonly name: string;
+    readonly root: WebKitDirectoryEntry;
+}
+
+declare var WebKitFileSystem: {
+    prototype: WebKitFileSystem;
+    new(): WebKitFileSystem;
+};
+
+interface WebKitPoint {
+    x: number;
+    y: number;
+}
+
+declare var WebKitPoint: {
+    prototype: WebKitPoint;
+    new(x?: number, y?: number): WebKitPoint;
+};
+
+interface webkitRTCPeerConnection extends RTCPeerConnection {
+    addEventListener<K extends keyof RTCPeerConnectionEventMap>(type: K, listener: (this: webkitRTCPeerConnection, ev: RTCPeerConnectionEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var webkitRTCPeerConnection: {
+    prototype: webkitRTCPeerConnection;
+    new(configuration: RTCConfiguration): webkitRTCPeerConnection;
+};
+
+interface WebSocketEventMap {
+    "close": CloseEvent;
+    "error": Event;
+    "message": MessageEvent;
+    "open": Event;
+}
+
+interface WebSocket extends EventTarget {
+    binaryType: string;
+    readonly bufferedAmount: number;
+    readonly extensions: string;
+    onclose: (this: WebSocket, ev: CloseEvent) => any;
+    onerror: (this: WebSocket, ev: Event) => any;
+    onmessage: (this: WebSocket, ev: MessageEvent) => any;
+    onopen: (this: WebSocket, ev: Event) => any;
+    readonly protocol: string;
+    readonly readyState: number;
+    readonly url: string;
+    close(code?: number, reason?: string): void;
+    send(data: any): void;
+    readonly CLOSED: number;
+    readonly CLOSING: number;
+    readonly CONNECTING: number;
+    readonly OPEN: number;
+    addEventListener<K extends keyof WebSocketEventMap>(type: K, listener: (this: WebSocket, ev: WebSocketEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var WebSocket: {
+    prototype: WebSocket;
+    new(url: string, protocols?: string | string[]): WebSocket;
+    readonly CLOSED: number;
+    readonly CLOSING: number;
+    readonly CONNECTING: number;
+    readonly OPEN: number;
+};
+
+interface WheelEvent extends MouseEvent {
+    readonly deltaMode: number;
+    readonly deltaX: number;
+    readonly deltaY: number;
+    readonly deltaZ: number;
+    readonly wheelDelta: number;
+    readonly wheelDeltaX: number;
+    readonly wheelDeltaY: number;
+    getCurrentPoint(element: Element): void;
+    initWheelEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, buttonArg: number, relatedTargetArg: EventTarget, modifiersListArg: string, deltaXArg: number, deltaYArg: number, deltaZArg: number, deltaMode: number): void;
+    readonly DOM_DELTA_LINE: number;
+    readonly DOM_DELTA_PAGE: number;
+    readonly DOM_DELTA_PIXEL: number;
+}
+
+declare var WheelEvent: {
+    prototype: WheelEvent;
+    new(typeArg: string, eventInitDict?: WheelEventInit): WheelEvent;
+    readonly DOM_DELTA_LINE: number;
+    readonly DOM_DELTA_PAGE: number;
+    readonly DOM_DELTA_PIXEL: number;
+};
+
+interface WindowEventMap extends GlobalEventHandlersEventMap {
+    "abort": UIEvent;
+    "afterprint": Event;
+    "beforeprint": Event;
+    "beforeunload": BeforeUnloadEvent;
+    "blur": FocusEvent;
+    "canplay": Event;
+    "canplaythrough": Event;
+    "change": Event;
+    "click": MouseEvent;
+    "compassneedscalibration": Event;
+    "contextmenu": PointerEvent;
+    "dblclick": MouseEvent;
+    "devicelight": DeviceLightEvent;
+    "devicemotion": DeviceMotionEvent;
+    "deviceorientation": DeviceOrientationEvent;
+    "drag": DragEvent;
+    "dragend": DragEvent;
+    "dragenter": DragEvent;
+    "dragleave": DragEvent;
+    "dragover": DragEvent;
+    "dragstart": DragEvent;
+    "drop": DragEvent;
+    "durationchange": Event;
+    "emptied": Event;
+    "ended": MediaStreamErrorEvent;
+    "error": ErrorEvent;
+    "focus": FocusEvent;
+    "hashchange": HashChangeEvent;
+    "input": Event;
+    "invalid": Event;
+    "keydown": KeyboardEvent;
+    "keypress": KeyboardEvent;
+    "keyup": KeyboardEvent;
+    "load": Event;
+    "loadeddata": Event;
+    "loadedmetadata": Event;
+    "loadstart": Event;
+    "message": MessageEvent;
+    "mousedown": MouseEvent;
+    "mouseenter": MouseEvent;
+    "mouseleave": MouseEvent;
+    "mousemove": MouseEvent;
+    "mouseout": MouseEvent;
+    "mouseover": MouseEvent;
+    "mouseup": MouseEvent;
+    "mousewheel": WheelEvent;
+    "MSGestureChange": MSGestureEvent;
+    "MSGestureDoubleTap": MSGestureEvent;
+    "MSGestureEnd": MSGestureEvent;
+    "MSGestureHold": MSGestureEvent;
+    "MSGestureStart": MSGestureEvent;
+    "MSGestureTap": MSGestureEvent;
+    "MSInertiaStart": MSGestureEvent;
+    "MSPointerCancel": MSPointerEvent;
+    "MSPointerDown": MSPointerEvent;
+    "MSPointerEnter": MSPointerEvent;
+    "MSPointerLeave": MSPointerEvent;
+    "MSPointerMove": MSPointerEvent;
+    "MSPointerOut": MSPointerEvent;
+    "MSPointerOver": MSPointerEvent;
+    "MSPointerUp": MSPointerEvent;
+    "offline": Event;
+    "online": Event;
+    "orientationchange": Event;
+    "pagehide": PageTransitionEvent;
+    "pageshow": PageTransitionEvent;
+    "pause": Event;
+    "play": Event;
+    "playing": Event;
+    "popstate": PopStateEvent;
+    "progress": ProgressEvent;
+    "ratechange": Event;
+    "readystatechange": ProgressEvent;
+    "reset": Event;
+    "resize": UIEvent;
+    "scroll": UIEvent;
+    "seeked": Event;
+    "seeking": Event;
+    "select": UIEvent;
+    "stalled": Event;
+    "storage": StorageEvent;
+    "submit": Event;
+    "suspend": Event;
+    "timeupdate": Event;
+    "touchcancel": TouchEvent;
+    "touchend": TouchEvent;
+    "touchmove": TouchEvent;
+    "touchstart": TouchEvent;
+    "unload": Event;
+    "volumechange": Event;
+    "waiting": Event;
+}
+
+interface Window extends EventTarget, WindowTimers, WindowSessionStorage, WindowLocalStorage, WindowConsole, GlobalEventHandlers, IDBEnvironment, WindowBase64, GlobalFetch {
+    readonly applicationCache: ApplicationCache;
+    readonly caches: CacheStorage;
+    readonly clientInformation: Navigator;
+    readonly closed: boolean;
+    readonly crypto: Crypto;
+    defaultStatus: string;
+    readonly devicePixelRatio: number;
+    readonly document: Document;
+    readonly doNotTrack: string;
+    event: Event | undefined;
+    readonly external: External;
+    readonly frameElement: Element;
+    readonly frames: Window;
+    readonly history: History;
+    readonly innerHeight: number;
+    readonly innerWidth: number;
+    readonly isSecureContext: boolean;
+    readonly length: number;
+    readonly location: Location;
+    readonly locationbar: BarProp;
+    readonly menubar: BarProp;
+    readonly msContentScript: ExtensionScriptApis;
+    readonly msCredentials: MSCredentials;
+    name: string;
+    readonly navigator: Navigator;
+    offscreenBuffering: string | boolean;
+    onabort: (this: Window, ev: UIEvent) => any;
+    onafterprint: (this: Window, ev: Event) => any;
+    onbeforeprint: (this: Window, ev: Event) => any;
+    onbeforeunload: (this: Window, ev: BeforeUnloadEvent) => any;
+    onblur: (this: Window, ev: FocusEvent) => any;
+    oncanplay: (this: Window, ev: Event) => any;
+    oncanplaythrough: (this: Window, ev: Event) => any;
+    onchange: (this: Window, ev: Event) => any;
+    onclick: (this: Window, ev: MouseEvent) => any;
+    oncompassneedscalibration: (this: Window, ev: Event) => any;
+    oncontextmenu: (this: Window, ev: PointerEvent) => any;
+    ondblclick: (this: Window, ev: MouseEvent) => any;
+    ondevicelight: (this: Window, ev: DeviceLightEvent) => any;
+    ondevicemotion: (this: Window, ev: DeviceMotionEvent) => any;
+    ondeviceorientation: (this: Window, ev: DeviceOrientationEvent) => any;
+    ondrag: (this: Window, ev: DragEvent) => any;
+    ondragend: (this: Window, ev: DragEvent) => any;
+    ondragenter: (this: Window, ev: DragEvent) => any;
+    ondragleave: (this: Window, ev: DragEvent) => any;
+    ondragover: (this: Window, ev: DragEvent) => any;
+    ondragstart: (this: Window, ev: DragEvent) => any;
+    ondrop: (this: Window, ev: DragEvent) => any;
+    ondurationchange: (this: Window, ev: Event) => any;
+    onemptied: (this: Window, ev: Event) => any;
+    onended: (this: Window, ev: MediaStreamErrorEvent) => any;
+    onerror: ErrorEventHandler;
+    onfocus: (this: Window, ev: FocusEvent) => any;
+    onhashchange: (this: Window, ev: HashChangeEvent) => any;
+    oninput: (this: Window, ev: Event) => any;
+    oninvalid: (this: Window, ev: Event) => any;
+    onkeydown: (this: Window, ev: KeyboardEvent) => any;
+    onkeypress: (this: Window, ev: KeyboardEvent) => any;
+    onkeyup: (this: Window, ev: KeyboardEvent) => any;
+    onload: (this: Window, ev: Event) => any;
+    onloadeddata: (this: Window, ev: Event) => any;
+    onloadedmetadata: (this: Window, ev: Event) => any;
+    onloadstart: (this: Window, ev: Event) => any;
+    onmessage: (this: Window, ev: MessageEvent) => any;
+    onmousedown: (this: Window, ev: MouseEvent) => any;
+    onmouseenter: (this: Window, ev: MouseEvent) => any;
+    onmouseleave: (this: Window, ev: MouseEvent) => any;
+    onmousemove: (this: Window, ev: MouseEvent) => any;
+    onmouseout: (this: Window, ev: MouseEvent) => any;
+    onmouseover: (this: Window, ev: MouseEvent) => any;
+    onmouseup: (this: Window, ev: MouseEvent) => any;
+    onmousewheel: (this: Window, ev: WheelEvent) => any;
+    onmsgesturechange: (this: Window, ev: MSGestureEvent) => any;
+    onmsgesturedoubletap: (this: Window, ev: MSGestureEvent) => any;
+    onmsgestureend: (this: Window, ev: MSGestureEvent) => any;
+    onmsgesturehold: (this: Window, ev: MSGestureEvent) => any;
+    onmsgesturestart: (this: Window, ev: MSGestureEvent) => any;
+    onmsgesturetap: (this: Window, ev: MSGestureEvent) => any;
+    onmsinertiastart: (this: Window, ev: MSGestureEvent) => any;
+    onmspointercancel: (this: Window, ev: MSPointerEvent) => any;
+    onmspointerdown: (this: Window, ev: MSPointerEvent) => any;
+    onmspointerenter: (this: Window, ev: MSPointerEvent) => any;
+    onmspointerleave: (this: Window, ev: MSPointerEvent) => any;
+    onmspointermove: (this: Window, ev: MSPointerEvent) => any;
+    onmspointerout: (this: Window, ev: MSPointerEvent) => any;
+    onmspointerover: (this: Window, ev: MSPointerEvent) => any;
+    onmspointerup: (this: Window, ev: MSPointerEvent) => any;
+    onoffline: (this: Window, ev: Event) => any;
+    ononline: (this: Window, ev: Event) => any;
+    onorientationchange: (this: Window, ev: Event) => any;
+    onpagehide: (this: Window, ev: PageTransitionEvent) => any;
+    onpageshow: (this: Window, ev: PageTransitionEvent) => any;
+    onpause: (this: Window, ev: Event) => any;
+    onplay: (this: Window, ev: Event) => any;
+    onplaying: (this: Window, ev: Event) => any;
+    onpopstate: (this: Window, ev: PopStateEvent) => any;
+    onprogress: (this: Window, ev: ProgressEvent) => any;
+    onratechange: (this: Window, ev: Event) => any;
+    onreadystatechange: (this: Window, ev: ProgressEvent) => any;
+    onreset: (this: Window, ev: Event) => any;
+    onresize: (this: Window, ev: UIEvent) => any;
+    onscroll: (this: Window, ev: UIEvent) => any;
+    onseeked: (this: Window, ev: Event) => any;
+    onseeking: (this: Window, ev: Event) => any;
+    onselect: (this: Window, ev: UIEvent) => any;
+    onstalled: (this: Window, ev: Event) => any;
+    onstorage: (this: Window, ev: StorageEvent) => any;
+    onsubmit: (this: Window, ev: Event) => any;
+    onsuspend: (this: Window, ev: Event) => any;
+    ontimeupdate: (this: Window, ev: Event) => any;
+    ontouchcancel: (ev: TouchEvent) => any;
+    ontouchend: (ev: TouchEvent) => any;
+    ontouchmove: (ev: TouchEvent) => any;
+    ontouchstart: (ev: TouchEvent) => any;
+    onunload: (this: Window, ev: Event) => any;
+    onvolumechange: (this: Window, ev: Event) => any;
+    onwaiting: (this: Window, ev: Event) => any;
+    opener: any;
+    orientation: string | number;
+    readonly outerHeight: number;
+    readonly outerWidth: number;
+    readonly pageXOffset: number;
+    readonly pageYOffset: number;
+    readonly parent: Window;
+    readonly performance: Performance;
+    readonly personalbar: BarProp;
+    readonly screen: Screen;
+    readonly screenLeft: number;
+    readonly screenTop: number;
+    readonly screenX: number;
+    readonly screenY: number;
+    readonly scrollbars: BarProp;
+    readonly scrollX: number;
+    readonly scrollY: number;
+    readonly self: Window;
+    readonly speechSynthesis: SpeechSynthesis;
+    status: string;
+    readonly statusbar: BarProp;
+    readonly styleMedia: StyleMedia;
+    readonly toolbar: BarProp;
+    readonly top: Window;
+    readonly window: Window;
+    URL: typeof URL;
+    URLSearchParams: typeof URLSearchParams;
+    Blob: typeof Blob;
+    customElements: CustomElementRegistry;
+    alert(message?: any): void;
+    blur(): void;
+    cancelAnimationFrame(handle: number): void;
+    captureEvents(): void;
+    close(): void;
+    confirm(message?: string): boolean;
+    departFocus(navigationReason: NavigationReason, origin: FocusNavigationOrigin): void;
+    focus(): void;
+    getComputedStyle(elt: Element, pseudoElt?: string): CSSStyleDeclaration;
+    getMatchedCSSRules(elt: Element, pseudoElt?: string): CSSRuleList;
+    getSelection(): Selection;
+    matchMedia(mediaQuery: string): MediaQueryList;
+    moveBy(x?: number, y?: number): void;
+    moveTo(x?: number, y?: number): void;
+    msWriteProfilerMark(profilerMarkName: string): void;
+    open(url?: string, target?: string, features?: string, replace?: boolean): Window;
+    postMessage(message: any, targetOrigin: string, transfer?: any[]): void;
+    print(): void;
+    prompt(message?: string, _default?: string): string | null;
+    releaseEvents(): void;
+    requestAnimationFrame(callback: FrameRequestCallback): number;
+    resizeBy(x?: number, y?: number): void;
+    resizeTo(x?: number, y?: number): void;
+    scroll(x?: number, y?: number): void;
+    scrollBy(x?: number, y?: number): void;
+    scrollTo(x?: number, y?: number): void;
+    stop(): void;
+    webkitCancelAnimationFrame(handle: number): void;
+    webkitConvertPointFromNodeToPage(node: Node, pt: WebKitPoint): WebKitPoint;
+    webkitConvertPointFromPageToNode(node: Node, pt: WebKitPoint): WebKitPoint;
+    webkitRequestAnimationFrame(callback: FrameRequestCallback): number;
+    createImageBitmap(image: HTMLImageElement | SVGImageElement | HTMLVideoElement | HTMLCanvasElement | ImageBitmap | ImageData | Blob, options?: ImageBitmapOptions): Promise<ImageBitmap>;
+    createImageBitmap(image: HTMLImageElement | SVGImageElement | HTMLVideoElement | HTMLCanvasElement | ImageBitmap | ImageData | Blob, sx: number, sy: number, sw: number, sh: number, options?: ImageBitmapOptions): Promise<ImageBitmap>;
+    scroll(options?: ScrollToOptions): void;
+    scrollTo(options?: ScrollToOptions): void;
+    scrollBy(options?: ScrollToOptions): void;
+    addEventListener<K extends keyof WindowEventMap>(type: K, listener: (this: Window, ev: WindowEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var Window: {
+    prototype: Window;
+    new(): Window;
+};
+
+interface WorkerEventMap extends AbstractWorkerEventMap {
+    "message": MessageEvent;
+}
+
+interface Worker extends EventTarget, AbstractWorker {
+    onmessage: (this: Worker, ev: MessageEvent) => any;
+    postMessage(message: any, transfer?: any[]): void;
+    terminate(): void;
+    addEventListener<K extends keyof WorkerEventMap>(type: K, listener: (this: Worker, ev: WorkerEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var Worker: {
+    prototype: Worker;
+    new(stringUrl: string): Worker;
+};
+
+interface XMLDocument extends Document {
+    addEventListener<K extends keyof DocumentEventMap>(type: K, listener: (this: XMLDocument, ev: DocumentEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var XMLDocument: {
+    prototype: XMLDocument;
+    new(): XMLDocument;
+};
+
+interface XMLHttpRequestEventMap extends XMLHttpRequestEventTargetEventMap {
+    "readystatechange": Event;
+}
+
+interface XMLHttpRequest extends EventTarget, XMLHttpRequestEventTarget {
+    onreadystatechange: (this: XMLHttpRequest, ev: Event) => any;
+    readonly readyState: number;
+    readonly response: any;
+    readonly responseText: string;
+    responseType: XMLHttpRequestResponseType;
+    readonly responseURL: string;
+    readonly responseXML: Document | null;
+    readonly status: number;
+    readonly statusText: string;
+    timeout: number;
+    readonly upload: XMLHttpRequestUpload;
+    withCredentials: boolean;
+    msCaching?: string;
+    abort(): void;
+    getAllResponseHeaders(): string;
+    getResponseHeader(header: string): string | null;
+    msCachingEnabled(): boolean;
+    open(method: string, url: string, async?: boolean, user?: string, password?: string): void;
+    overrideMimeType(mime: string): void;
+    send(data?: Document): void;
+    send(data?: string): void;
+    send(data?: any): void;
+    setRequestHeader(header: string, value: string): void;
+    readonly DONE: number;
+    readonly HEADERS_RECEIVED: number;
+    readonly LOADING: number;
+    readonly OPENED: number;
+    readonly UNSENT: number;
+    addEventListener<K extends keyof XMLHttpRequestEventMap>(type: K, listener: (this: XMLHttpRequest, ev: XMLHttpRequestEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var XMLHttpRequest: {
+    prototype: XMLHttpRequest;
+    new(): XMLHttpRequest;
+    readonly DONE: number;
+    readonly HEADERS_RECEIVED: number;
+    readonly LOADING: number;
+    readonly OPENED: number;
+    readonly UNSENT: number;
+};
+
+interface XMLHttpRequestUpload extends EventTarget, XMLHttpRequestEventTarget {
+    addEventListener<K extends keyof XMLHttpRequestEventTargetEventMap>(type: K, listener: (this: XMLHttpRequestUpload, ev: XMLHttpRequestEventTargetEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var XMLHttpRequestUpload: {
+    prototype: XMLHttpRequestUpload;
+    new(): XMLHttpRequestUpload;
+};
+
+interface XMLSerializer {
+    serializeToString(target: Node): string;
+}
+
+declare var XMLSerializer: {
+    prototype: XMLSerializer;
+    new(): XMLSerializer;
+};
+
+interface XPathEvaluator {
+    createExpression(expression: string, resolver: XPathNSResolver): XPathExpression;
+    createNSResolver(nodeResolver?: Node): XPathNSResolver;
+    evaluate(expression: string, contextNode: Node, resolver: XPathNSResolver | null, type: number, result: XPathResult | null): XPathResult;
+}
+
+declare var XPathEvaluator: {
+    prototype: XPathEvaluator;
+    new(): XPathEvaluator;
+};
+
+interface XPathExpression {
+    evaluate(contextNode: Node, type: number, result: XPathResult | null): XPathResult;
+}
+
+declare var XPathExpression: {
+    prototype: XPathExpression;
+    new(): XPathExpression;
+};
+
+interface XPathNSResolver {
+    lookupNamespaceURI(prefix: string): string;
+}
+
+declare var XPathNSResolver: {
+    prototype: XPathNSResolver;
+    new(): XPathNSResolver;
+};
+
+interface XPathResult {
+    readonly booleanValue: boolean;
+    readonly invalidIteratorState: boolean;
+    readonly numberValue: number;
+    readonly resultType: number;
+    readonly singleNodeValue: Node;
+    readonly snapshotLength: number;
+    readonly stringValue: string;
+    iterateNext(): Node;
+    snapshotItem(index: number): Node;
+    readonly ANY_TYPE: number;
+    readonly ANY_UNORDERED_NODE_TYPE: number;
+    readonly BOOLEAN_TYPE: number;
+    readonly FIRST_ORDERED_NODE_TYPE: number;
+    readonly NUMBER_TYPE: number;
+    readonly ORDERED_NODE_ITERATOR_TYPE: number;
+    readonly ORDERED_NODE_SNAPSHOT_TYPE: number;
+    readonly STRING_TYPE: number;
+    readonly UNORDERED_NODE_ITERATOR_TYPE: number;
+    readonly UNORDERED_NODE_SNAPSHOT_TYPE: number;
+}
+
+declare var XPathResult: {
+    prototype: XPathResult;
+    new(): XPathResult;
+    readonly ANY_TYPE: number;
+    readonly ANY_UNORDERED_NODE_TYPE: number;
+    readonly BOOLEAN_TYPE: number;
+    readonly FIRST_ORDERED_NODE_TYPE: number;
+    readonly NUMBER_TYPE: number;
+    readonly ORDERED_NODE_ITERATOR_TYPE: number;
+    readonly ORDERED_NODE_SNAPSHOT_TYPE: number;
+    readonly STRING_TYPE: number;
+    readonly UNORDERED_NODE_ITERATOR_TYPE: number;
+    readonly UNORDERED_NODE_SNAPSHOT_TYPE: number;
+};
+
+interface XSLTProcessor {
+    clearParameters(): void;
+    getParameter(namespaceURI: string, localName: string): any;
+    importStylesheet(style: Node): void;
+    removeParameter(namespaceURI: string, localName: string): void;
+    reset(): void;
+    setParameter(namespaceURI: string, localName: string, value: any): void;
+    transformToDocument(source: Node): Document;
+    transformToFragment(source: Node, document: Document): DocumentFragment;
+}
+
+declare var XSLTProcessor: {
+    prototype: XSLTProcessor;
+    new(): XSLTProcessor;
+};
+
+interface AbstractWorkerEventMap {
+    "error": ErrorEvent;
+}
+
+interface AbstractWorker {
+    onerror: (this: AbstractWorker, ev: ErrorEvent) => any;
+    addEventListener<K extends keyof AbstractWorkerEventMap>(type: K, listener: (this: AbstractWorker, ev: AbstractWorkerEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+interface Body {
+    readonly bodyUsed: boolean;
+    arrayBuffer(): Promise<ArrayBuffer>;
+    blob(): Promise<Blob>;
+    json(): Promise<any>;
+    text(): Promise<string>;
+    formData(): Promise<FormData>;
+}
+
+interface CanvasPathMethods {
+    arc(x: number, y: number, radius: number, startAngle: number, endAngle: number, anticlockwise?: boolean): void;
+    arcTo(x1: number, y1: number, x2: number, y2: number, radius: number): void;
+    bezierCurveTo(cp1x: number, cp1y: number, cp2x: number, cp2y: number, x: number, y: number): void;
+    closePath(): void;
+    ellipse(x: number, y: number, radiusX: number, radiusY: number, rotation: number, startAngle: number, endAngle: number, anticlockwise?: boolean): void;
+    lineTo(x: number, y: number): void;
+    moveTo(x: number, y: number): void;
+    quadraticCurveTo(cpx: number, cpy: number, x: number, y: number): void;
+    rect(x: number, y: number, w: number, h: number): void;
+}
+
+interface ChildNode {
+    remove(): void;
+}
+
+interface DocumentEvent {
+    createEvent(eventInterface: "AnimationEvent"): AnimationEvent;
+    createEvent(eventInterface: "AudioProcessingEvent"): AudioProcessingEvent;
+    createEvent(eventInterface: "BeforeUnloadEvent"): BeforeUnloadEvent;
+    createEvent(eventInterface: "ClipboardEvent"): ClipboardEvent;
+    createEvent(eventInterface: "CloseEvent"): CloseEvent;
+    createEvent(eventInterface: "CompositionEvent"): CompositionEvent;
+    createEvent(eventInterface: "CustomEvent"): CustomEvent;
+    createEvent(eventInterface: "DeviceLightEvent"): DeviceLightEvent;
+    createEvent(eventInterface: "DeviceMotionEvent"): DeviceMotionEvent;
+    createEvent(eventInterface: "DeviceOrientationEvent"): DeviceOrientationEvent;
+    createEvent(eventInterface: "DragEvent"): DragEvent;
+    createEvent(eventInterface: "ErrorEvent"): ErrorEvent;
+    createEvent(eventInterface: "Event"): Event;
+    createEvent(eventInterface: "Events"): Event;
+    createEvent(eventInterface: "FocusEvent"): FocusEvent;
+    createEvent(eventInterface: "FocusNavigationEvent"): FocusNavigationEvent;
+    createEvent(eventInterface: "GamepadEvent"): GamepadEvent;
+    createEvent(eventInterface: "HashChangeEvent"): HashChangeEvent;
+    createEvent(eventInterface: "IDBVersionChangeEvent"): IDBVersionChangeEvent;
+    createEvent(eventInterface: "KeyboardEvent"): KeyboardEvent;
+    createEvent(eventInterface: "ListeningStateChangedEvent"): ListeningStateChangedEvent;
+    createEvent(eventInterface: "LongRunningScriptDetectedEvent"): LongRunningScriptDetectedEvent;
+    createEvent(eventInterface: "MSGestureEvent"): MSGestureEvent;
+    createEvent(eventInterface: "MSManipulationEvent"): MSManipulationEvent;
+    createEvent(eventInterface: "MSMediaKeyMessageEvent"): MSMediaKeyMessageEvent;
+    createEvent(eventInterface: "MSMediaKeyNeededEvent"): MSMediaKeyNeededEvent;
+    createEvent(eventInterface: "MSPointerEvent"): MSPointerEvent;
+    createEvent(eventInterface: "MSSiteModeEvent"): MSSiteModeEvent;
+    createEvent(eventInterface: "MediaEncryptedEvent"): MediaEncryptedEvent;
+    createEvent(eventInterface: "MediaKeyMessageEvent"): MediaKeyMessageEvent;
+    createEvent(eventInterface: "MediaStreamErrorEvent"): MediaStreamErrorEvent;
+    createEvent(eventInterface: "MediaStreamEvent"): MediaStreamEvent;
+    createEvent(eventInterface: "MediaStreamTrackEvent"): MediaStreamTrackEvent;
+    createEvent(eventInterface: "MessageEvent"): MessageEvent;
+    createEvent(eventInterface: "MouseEvent"): MouseEvent;
+    createEvent(eventInterface: "MouseEvents"): MouseEvent;
+    createEvent(eventInterface: "MutationEvent"): MutationEvent;
+    createEvent(eventInterface: "MutationEvents"): MutationEvent;
+    createEvent(eventInterface: "NavigationCompletedEvent"): NavigationCompletedEvent;
+    createEvent(eventInterface: "NavigationEvent"): NavigationEvent;
+    createEvent(eventInterface: "NavigationEventWithReferrer"): NavigationEventWithReferrer;
+    createEvent(eventInterface: "OfflineAudioCompletionEvent"): OfflineAudioCompletionEvent;
+    createEvent(eventInterface: "OverflowEvent"): OverflowEvent;
+    createEvent(eventInterface: "PageTransitionEvent"): PageTransitionEvent;
+    createEvent(eventInterface: "PaymentRequestUpdateEvent"): PaymentRequestUpdateEvent;
+    createEvent(eventInterface: "PermissionRequestedEvent"): PermissionRequestedEvent;
+    createEvent(eventInterface: "PointerEvent"): PointerEvent;
+    createEvent(eventInterface: "PopStateEvent"): PopStateEvent;
+    createEvent(eventInterface: "ProgressEvent"): ProgressEvent;
+    createEvent(eventInterface: "RTCDTMFToneChangeEvent"): RTCDTMFToneChangeEvent;
+    createEvent(eventInterface: "RTCDtlsTransportStateChangedEvent"): RTCDtlsTransportStateChangedEvent;
+    createEvent(eventInterface: "RTCIceCandidatePairChangedEvent"): RTCIceCandidatePairChangedEvent;
+    createEvent(eventInterface: "RTCIceGathererEvent"): RTCIceGathererEvent;
+    createEvent(eventInterface: "RTCIceTransportStateChangedEvent"): RTCIceTransportStateChangedEvent;
+    createEvent(eventInterface: "RTCPeerConnectionIceEvent"): RTCPeerConnectionIceEvent;
+    createEvent(eventInterface: "RTCSsrcConflictEvent"): RTCSsrcConflictEvent;
+    createEvent(eventInterface: "SVGZoomEvent"): SVGZoomEvent;
+    createEvent(eventInterface: "SVGZoomEvents"): SVGZoomEvent;
+    createEvent(eventInterface: "ScriptNotifyEvent"): ScriptNotifyEvent;
+    createEvent(eventInterface: "ServiceWorkerMessageEvent"): ServiceWorkerMessageEvent;
+    createEvent(eventInterface: "SpeechSynthesisEvent"): SpeechSynthesisEvent;
+    createEvent(eventInterface: "StorageEvent"): StorageEvent;
+    createEvent(eventInterface: "TextEvent"): TextEvent;
+    createEvent(eventInterface: "TouchEvent"): TouchEvent;
+    createEvent(eventInterface: "TrackEvent"): TrackEvent;
+    createEvent(eventInterface: "TransitionEvent"): TransitionEvent;
+    createEvent(eventInterface: "UIEvent"): UIEvent;
+    createEvent(eventInterface: "UIEvents"): UIEvent;
+    createEvent(eventInterface: "UnviewableContentIdentifiedEvent"): UnviewableContentIdentifiedEvent;
+    createEvent(eventInterface: "WebGLContextEvent"): WebGLContextEvent;
+    createEvent(eventInterface: "WheelEvent"): WheelEvent;
+    createEvent(eventInterface: string): Event;
+}
+
+interface DOML2DeprecatedColorProperty {
+    color: string;
+}
+
+interface DOML2DeprecatedSizeProperty {
+    size: number;
+}
+
+interface ElementTraversal {
+    readonly childElementCount: number;
+    readonly firstElementChild: Element | null;
+    readonly lastElementChild: Element | null;
+    readonly nextElementSibling: Element | null;
+    readonly previousElementSibling: Element | null;
+}
+
+interface GetSVGDocument {
+    getSVGDocument(): Document;
+}
+
+interface GlobalEventHandlersEventMap {
+    "pointercancel": PointerEvent;
+    "pointerdown": PointerEvent;
+    "pointerenter": PointerEvent;
+    "pointerleave": PointerEvent;
+    "pointermove": PointerEvent;
+    "pointerout": PointerEvent;
+    "pointerover": PointerEvent;
+    "pointerup": PointerEvent;
+    "wheel": WheelEvent;
+}
+
+interface GlobalEventHandlers {
+    onpointercancel: (this: GlobalEventHandlers, ev: PointerEvent) => any;
+    onpointerdown: (this: GlobalEventHandlers, ev: PointerEvent) => any;
+    onpointerenter: (this: GlobalEventHandlers, ev: PointerEvent) => any;
+    onpointerleave: (this: GlobalEventHandlers, ev: PointerEvent) => any;
+    onpointermove: (this: GlobalEventHandlers, ev: PointerEvent) => any;
+    onpointerout: (this: GlobalEventHandlers, ev: PointerEvent) => any;
+    onpointerover: (this: GlobalEventHandlers, ev: PointerEvent) => any;
+    onpointerup: (this: GlobalEventHandlers, ev: PointerEvent) => any;
+    onwheel: (this: GlobalEventHandlers, ev: WheelEvent) => any;
+    addEventListener<K extends keyof GlobalEventHandlersEventMap>(type: K, listener: (this: GlobalEventHandlers, ev: GlobalEventHandlersEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+interface GlobalFetch {
+    fetch(input: RequestInfo, init?: RequestInit): Promise<Response>;
+}
+
+interface HTMLTableAlignment {
+    /**
+     * Sets or retrieves a value that you can use to implement your own ch functionality for the object.
+     */
+    ch: string;
+    /**
+     * Sets or retrieves a value that you can use to implement your own chOff functionality for the object.
+     */
+    chOff: string;
+    /**
+     * Sets or retrieves how text and other content are vertically aligned within the object that contains them.
+     */
+    vAlign: string;
+}
+
+interface IDBEnvironment {
+    readonly indexedDB: IDBFactory;
+}
+
+interface LinkStyle {
+    readonly sheet: StyleSheet;
+}
+
+interface MSBaseReaderEventMap {
+    "abort": Event;
+    "error": ErrorEvent;
+    "load": Event;
+    "loadend": ProgressEvent;
+    "loadstart": Event;
+    "progress": ProgressEvent;
+}
+
+interface MSBaseReader {
+    onabort: (this: MSBaseReader, ev: Event) => any;
+    onerror: (this: MSBaseReader, ev: ErrorEvent) => any;
+    onload: (this: MSBaseReader, ev: Event) => any;
+    onloadend: (this: MSBaseReader, ev: ProgressEvent) => any;
+    onloadstart: (this: MSBaseReader, ev: Event) => any;
+    onprogress: (this: MSBaseReader, ev: ProgressEvent) => any;
+    readonly readyState: number;
+    readonly result: any;
+    abort(): void;
+    readonly DONE: number;
+    readonly EMPTY: number;
+    readonly LOADING: number;
+    addEventListener<K extends keyof MSBaseReaderEventMap>(type: K, listener: (this: MSBaseReader, ev: MSBaseReaderEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+interface MSFileSaver {
+    msSaveBlob(blob: any, defaultName?: string): boolean;
+    msSaveOrOpenBlob(blob: any, defaultName?: string): boolean;
+}
+
+interface MSNavigatorDoNotTrack {
+    confirmSiteSpecificTrackingException(args: ConfirmSiteSpecificExceptionsInformation): boolean;
+    confirmWebWideTrackingException(args: ExceptionInformation): boolean;
+    removeSiteSpecificTrackingException(args: ExceptionInformation): void;
+    removeWebWideTrackingException(args: ExceptionInformation): void;
+    storeSiteSpecificTrackingException(args: StoreSiteSpecificExceptionsInformation): void;
+    storeWebWideTrackingException(args: StoreExceptionsInformation): void;
+}
+
+interface NavigatorBeacon {
+    sendBeacon(url: USVString, data?: BodyInit): boolean;
+}
+
+interface NavigatorConcurrentHardware {
+    readonly hardwareConcurrency: number;
+}
+
+interface NavigatorContentUtils {
+}
+
+interface NavigatorGeolocation {
+    readonly geolocation: Geolocation;
+}
+
+interface NavigatorID {
+    readonly appCodeName: string;
+    readonly appName: string;
+    readonly appVersion: string;
+    readonly platform: string;
+    readonly product: string;
+    readonly productSub: string;
+    readonly userAgent: string;
+    readonly vendor: string;
+    readonly vendorSub: string;
+}
+
+interface NavigatorOnLine {
+    readonly onLine: boolean;
+}
+
+interface NavigatorStorageUtils {
+}
+
+interface NavigatorUserMedia {
+    readonly mediaDevices: MediaDevices;
+    getUserMedia(constraints: MediaStreamConstraints, successCallback: NavigatorUserMediaSuccessCallback, errorCallback: NavigatorUserMediaErrorCallback): void;
+}
+
+interface NodeSelector {
+    querySelector<K extends keyof ElementTagNameMap>(selectors: K): ElementTagNameMap[K] | null;
+    querySelector(selectors: string): Element | null;
+    querySelectorAll<K extends keyof ElementListTagNameMap>(selectors: K): ElementListTagNameMap[K];
+    querySelectorAll(selectors: string): NodeListOf<Element>;
+}
+
+interface RandomSource {
+    getRandomValues(array: ArrayBufferView): ArrayBufferView;
+}
+
+interface SVGAnimatedPoints {
+    readonly animatedPoints: SVGPointList;
+    readonly points: SVGPointList;
+}
+
+interface SVGFilterPrimitiveStandardAttributes {
+    readonly height: SVGAnimatedLength;
+    readonly result: SVGAnimatedString;
+    readonly width: SVGAnimatedLength;
+    readonly x: SVGAnimatedLength;
+    readonly y: SVGAnimatedLength;
+}
+
+interface SVGFitToViewBox {
+    readonly preserveAspectRatio: SVGAnimatedPreserveAspectRatio;
+    readonly viewBox: SVGAnimatedRect;
+}
+
+interface SVGTests {
+    readonly requiredExtensions: SVGStringList;
+    readonly requiredFeatures: SVGStringList;
+    readonly systemLanguage: SVGStringList;
+    hasExtension(extension: string): boolean;
+}
+
+interface SVGURIReference {
+    readonly href: SVGAnimatedString;
+}
+
+interface WindowBase64 {
+    atob(encodedString: string): string;
+    btoa(rawString: string): string;
+}
+
+interface WindowConsole {
+    readonly console: Console;
+}
+
+interface WindowLocalStorage {
+    readonly localStorage: Storage;
+}
+
+interface WindowSessionStorage {
+    readonly sessionStorage: Storage;
+}
+
+interface WindowTimers extends Object, WindowTimersExtension {
+    clearInterval(handle: number): void;
+    clearTimeout(handle: number): void;
+    setInterval(handler: (...args: any[]) => void, timeout: number): number;
+    setInterval(handler: any, timeout?: any, ...args: any[]): number;
+    setTimeout(handler: (...args: any[]) => void, timeout: number): number;
+    setTimeout(handler: any, timeout?: any, ...args: any[]): number;
+}
+
+interface WindowTimersExtension {
+    clearImmediate(handle: number): void;
+    setImmediate(handler: (...args: any[]) => void): number;
+    setImmediate(handler: any, ...args: any[]): number;
+}
+
+interface XMLHttpRequestEventTargetEventMap {
+    "abort": Event;
+    "error": ErrorEvent;
+    "load": Event;
+    "loadend": ProgressEvent;
+    "loadstart": Event;
+    "progress": ProgressEvent;
+    "timeout": ProgressEvent;
+}
+
+interface XMLHttpRequestEventTarget {
+    onabort: (this: XMLHttpRequestEventTarget, ev: Event) => any;
+    onerror: (this: XMLHttpRequestEventTarget, ev: ErrorEvent) => any;
+    onload: (this: XMLHttpRequestEventTarget, ev: Event) => any;
+    onloadend: (this: XMLHttpRequestEventTarget, ev: ProgressEvent) => any;
+    onloadstart: (this: XMLHttpRequestEventTarget, ev: Event) => any;
+    onprogress: (this: XMLHttpRequestEventTarget, ev: ProgressEvent) => any;
+    ontimeout: (this: XMLHttpRequestEventTarget, ev: ProgressEvent) => any;
+    addEventListener<K extends keyof XMLHttpRequestEventTargetEventMap>(type: K, listener: (this: XMLHttpRequestEventTarget, ev: XMLHttpRequestEventTargetEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+interface ErrorEventInit {
+    message?: string;
+    filename?: string;
+    lineno?: number;
+    conlno?: number;
+    error?: any;
+}
+
+interface StorageEventInit extends EventInit {
+    key?: string;
+    oldValue?: string;
+    newValue?: string;
+    url: string;
+    storageArea?: Storage;
+}
+
+interface Canvas2DContextAttributes {
+    alpha?: boolean;
+    willReadFrequently?: boolean;
+    storage?: boolean;
+    [attribute: string]: boolean | string | undefined;
+}
+
+interface ImageBitmapOptions {
+    imageOrientation?: "none" | "flipY";
+    premultiplyAlpha?: "none" | "premultiply" | "default";
+    colorSpaceConversion?: "none" | "default";
+    resizeWidth?: number;
+    resizeHeight?: number;
+    resizeQuality?: "pixelated" | "low" | "medium" | "high";
+}
+
+interface ImageBitmap {
+    readonly width: number;
+    readonly height: number;
+    close(): void;
+}
+
+interface URLSearchParams {
+    /**
+     * Appends a specified key/value pair as a new search parameter.
+     */
+    append(name: string, value: string): void;
+    /**
+     * Deletes the given search parameter, and its associated value, from the list of all search parameters.
+     */
+    delete(name: string): void;
+    /**
+     * Returns the first value associated to the given search parameter.
+     */
+    get(name: string): string | null;
+    /**
+     * Returns all the values association with a given search parameter.
+     */
+    getAll(name: string): string[];
+    /**
+     * Returns a Boolean indicating if such a search parameter exists.
+     */
+    has(name: string): boolean;
+    /**
+     * Sets the value associated to a given search parameter to the given value. If there were several values, delete the others.
+     */
+    set(name: string, value: string): void;
+}
+
+declare var URLSearchParams: {
+    prototype: URLSearchParams;
+    /**
+     * Constructor returning a URLSearchParams object.
+     */
+    new (init?: string | URLSearchParams): URLSearchParams;
+};
+
+interface NodeListOf<TNode extends Node> extends NodeList {
+    length: number;
+    item(index: number): TNode;
+    [index: number]: TNode;
+}
+
+interface HTMLCollectionOf<T extends Element> extends HTMLCollection {
+    item(index: number): T;
+    namedItem(name: string): T;
+    [index: number]: T;
+}
+
+interface BlobPropertyBag {
+    type?: string;
+    endings?: string;
+}
+
+interface FilePropertyBag {
+    type?: string;
+    lastModified?: number;
+}
+
+interface EventListenerObject {
+    handleEvent(evt: Event): void;
+}
+
+interface ProgressEventInit extends EventInit {
+    lengthComputable?: boolean;
+    loaded?: number;
+    total?: number;
+}
+
+interface ScrollOptions {
+    behavior?: ScrollBehavior;
+}
+
+interface ScrollToOptions extends ScrollOptions {
+    left?: number;
+    top?: number;
+}
+
+interface ScrollIntoViewOptions extends ScrollOptions {
+    block?: ScrollLogicalPosition;
+    inline?: ScrollLogicalPosition;
+}
+
+interface ClipboardEventInit extends EventInit {
+    data?: string;
+    dataType?: string;
+}
+
+interface IDBArrayKey extends Array<IDBValidKey> {
+}
+
+interface RsaKeyGenParams extends Algorithm {
+    modulusLength: number;
+    publicExponent: Uint8Array;
+}
+
+interface RsaHashedKeyGenParams extends RsaKeyGenParams {
+    hash: AlgorithmIdentifier;
+}
+
+interface RsaKeyAlgorithm extends KeyAlgorithm {
+    modulusLength: number;
+    publicExponent: Uint8Array;
+}
+
+interface RsaHashedKeyAlgorithm extends RsaKeyAlgorithm {
+    hash: AlgorithmIdentifier;
+}
+
+interface RsaHashedImportParams {
+    hash: AlgorithmIdentifier;
+}
+
+interface RsaPssParams {
+    saltLength: number;
+}
+
+interface RsaOaepParams extends Algorithm {
+    label?: BufferSource;
+}
+
+interface EcdsaParams extends Algorithm {
+    hash: AlgorithmIdentifier;
+}
+
+interface EcKeyGenParams extends Algorithm {
+    namedCurve: string;
+}
+
+interface EcKeyAlgorithm extends KeyAlgorithm {
+    typedCurve: string;
+}
+
+interface EcKeyImportParams {
+    namedCurve: string;
+}
+
+interface EcdhKeyDeriveParams extends Algorithm {
+    public: CryptoKey;
+}
+
+interface AesCtrParams extends Algorithm {
+    counter: BufferSource;
+    length: number;
+}
+
+interface AesKeyAlgorithm extends KeyAlgorithm {
+    length: number;
+}
+
+interface AesKeyGenParams extends Algorithm {
+    length: number;
+}
+
+interface AesDerivedKeyParams extends Algorithm {
+    length: number;
+}
+
+interface AesCbcParams extends Algorithm {
+    iv: BufferSource;
+}
+
+interface AesCmacParams extends Algorithm {
+    length: number;
+}
+
+interface AesGcmParams extends Algorithm {
+    iv: BufferSource;
+    additionalData?: BufferSource;
+    tagLength?: number;
+}
+
+interface AesCfbParams extends Algorithm {
+    iv: BufferSource;
+}
+
+interface HmacImportParams extends Algorithm {
+    hash?: AlgorithmIdentifier;
+    length?: number;
+}
+
+interface HmacKeyAlgorithm extends KeyAlgorithm {
+    hash: AlgorithmIdentifier;
+    length: number;
+}
+
+interface HmacKeyGenParams extends Algorithm {
+    hash: AlgorithmIdentifier;
+    length?: number;
+}
+
+interface DhKeyGenParams extends Algorithm {
+    prime: Uint8Array;
+    generator: Uint8Array;
+}
+
+interface DhKeyAlgorithm extends KeyAlgorithm {
+    prime: Uint8Array;
+    generator: Uint8Array;
+}
+
+interface DhKeyDeriveParams extends Algorithm {
+    public: CryptoKey;
+}
+
+interface DhImportKeyParams extends Algorithm {
+    prime: Uint8Array;
+    generator: Uint8Array;
+}
+
+interface ConcatParams extends Algorithm {
+    hash?: AlgorithmIdentifier;
+    algorithmId: Uint8Array;
+    partyUInfo: Uint8Array;
+    partyVInfo: Uint8Array;
+    publicInfo?: Uint8Array;
+    privateInfo?: Uint8Array;
+}
+
+interface HkdfCtrParams extends Algorithm {
+    hash: AlgorithmIdentifier;
+    label: BufferSource;
+    context: BufferSource;
+}
+
+interface Pbkdf2Params extends Algorithm {
+    salt: BufferSource;
+    iterations: number;
+    hash: AlgorithmIdentifier;
+}
+
+interface RsaOtherPrimesInfo {
+    r: string;
+    d: string;
+    t: string;
+}
+
+interface JsonWebKey {
+    kty: string;
+    use?: string;
+    key_ops?: string[];
+    alg?: string;
+    kid?: string;
+    x5u?: string;
+    x5c?: string;
+    x5t?: string;
+    ext?: boolean;
+    crv?: string;
+    x?: string;
+    y?: string;
+    d?: string;
+    n?: string;
+    e?: string;
+    p?: string;
+    q?: string;
+    dp?: string;
+    dq?: string;
+    qi?: string;
+    oth?: RsaOtherPrimesInfo[];
+    k?: string;
+}
+
+interface ParentNode {
+    readonly children: HTMLCollection;
+    readonly firstElementChild: Element | null;
+    readonly lastElementChild: Element | null;
+    readonly childElementCount: number;
+}
+
+interface DocumentOrShadowRoot {
+    readonly activeElement: Element | null;
+    readonly stylesheets: StyleSheetList;
+    getSelection(): Selection | null;
+    elementFromPoint(x: number, y: number): Element | null;
+    elementsFromPoint(x: number, y: number): Element[];
+}
+
+interface ShadowRoot extends DocumentOrShadowRoot, DocumentFragment {
+    readonly host: Element;
+    innerHTML: string;
+}
+
+interface ShadowRootInit {
+    mode: "open" | "closed";
+    delegatesFocus?: boolean;
+}
+
+interface HTMLSlotElement extends HTMLElement {
+    name: string;
+    assignedNodes(options?: AssignedNodesOptions): Node[];
+}
+
+interface AssignedNodesOptions {
+    flatten?: boolean;
+}
+
+interface ElementDefinitionOptions {
+    extends: string;
+}
+
+interface CustomElementRegistry {
+    define(name: string, constructor: Function, options?: ElementDefinitionOptions): void;
+    get(name: string): any;
+    whenDefined(name: string): PromiseLike<void>;
+}
+
+interface PromiseRejectionEvent extends Event {
+    readonly promise: PromiseLike<any>;
+    readonly reason: any;
+}
+
+interface PromiseRejectionEventInit extends EventInit {
+    promise: PromiseLike<any>;
+    reason?: any;
+}
+
+interface EventListenerOptions {
+    capture?: boolean;
+}
+
+interface AddEventListenerOptions extends EventListenerOptions {
+    passive?: boolean;
+    once?: boolean;
+}
+
+interface TouchEventInit extends EventModifierInit {
+    touches?: Touch[];
+    targetTouches?: Touch[];
+    changedTouches?: Touch[];
+}
+
+declare type EventListenerOrEventListenerObject = EventListener | EventListenerObject;
+
+interface DecodeErrorCallback {
+    (error: DOMException): void;
+}
+interface DecodeSuccessCallback {
+    (decodedData: AudioBuffer): void;
+}
+interface ErrorEventHandler {
+    (message: string, filename?: string, lineno?: number, colno?: number, error?: Error): void;
+}
+interface ForEachCallback {
+    (keyId: any, status: MediaKeyStatus): void;
+}
+interface FrameRequestCallback {
+    (time: number): void;
+}
+interface FunctionStringCallback {
+    (data: string): void;
+}
+interface IntersectionObserverCallback {
+    (entries: IntersectionObserverEntry[], observer: IntersectionObserver): void;
+}
+interface MediaQueryListListener {
+    (mql: MediaQueryList): void;
+}
+interface MSExecAtPriorityFunctionCallback {
+    (...args: any[]): any;
+}
+interface MSLaunchUriCallback {
+    (): void;
+}
+interface MSUnsafeFunctionCallback {
+    (): any;
+}
+interface MutationCallback {
+    (mutations: MutationRecord[], observer: MutationObserver): void;
+}
+interface NavigatorUserMediaErrorCallback {
+    (error: MediaStreamError): void;
+}
+interface NavigatorUserMediaSuccessCallback {
+    (stream: MediaStream): void;
+}
+interface NotificationPermissionCallback {
+    (permission: NotificationPermission): void;
+}
+interface PositionCallback {
+    (position: Position): void;
+}
+interface PositionErrorCallback {
+    (error: PositionError): void;
+}
+interface RTCPeerConnectionErrorCallback {
+    (error: DOMError): void;
+}
+interface RTCSessionDescriptionCallback {
+    (sdp: RTCSessionDescription): void;
+}
+interface RTCStatsCallback {
+    (report: RTCStatsReport): void;
+}
+interface VoidFunction {
+    (): void;
+}
+interface HTMLElementTagNameMap {
+    "a": HTMLAnchorElement;
+    "applet": HTMLAppletElement;
+    "area": HTMLAreaElement;
+    "audio": HTMLAudioElement;
+    "base": HTMLBaseElement;
+    "basefont": HTMLBaseFontElement;
+    "blockquote": HTMLQuoteElement;
+    "body": HTMLBodyElement;
+    "br": HTMLBRElement;
+    "button": HTMLButtonElement;
+    "canvas": HTMLCanvasElement;
+    "caption": HTMLTableCaptionElement;
+    "col": HTMLTableColElement;
+    "colgroup": HTMLTableColElement;
+    "data": HTMLDataElement;
+    "datalist": HTMLDataListElement;
+    "del": HTMLModElement;
+    "dir": HTMLDirectoryElement;
+    "div": HTMLDivElement;
+    "dl": HTMLDListElement;
+    "embed": HTMLEmbedElement;
+    "fieldset": HTMLFieldSetElement;
+    "font": HTMLFontElement;
+    "form": HTMLFormElement;
+    "frame": HTMLFrameElement;
+    "frameset": HTMLFrameSetElement;
+    "h1": HTMLHeadingElement;
+    "h2": HTMLHeadingElement;
+    "h3": HTMLHeadingElement;
+    "h4": HTMLHeadingElement;
+    "h5": HTMLHeadingElement;
+    "h6": HTMLHeadingElement;
+    "head": HTMLHeadElement;
+    "hr": HTMLHRElement;
+    "html": HTMLHtmlElement;
+    "iframe": HTMLIFrameElement;
+    "img": HTMLImageElement;
+    "input": HTMLInputElement;
+    "ins": HTMLModElement;
+    "isindex": HTMLUnknownElement;
+    "label": HTMLLabelElement;
+    "legend": HTMLLegendElement;
+    "li": HTMLLIElement;
+    "link": HTMLLinkElement;
+    "listing": HTMLPreElement;
+    "map": HTMLMapElement;
+    "marquee": HTMLMarqueeElement;
+    "menu": HTMLMenuElement;
+    "meta": HTMLMetaElement;
+    "meter": HTMLMeterElement;
+    "nextid": HTMLUnknownElement;
+    "object": HTMLObjectElement;
+    "ol": HTMLOListElement;
+    "optgroup": HTMLOptGroupElement;
+    "option": HTMLOptionElement;
+    "output": HTMLOutputElement;
+    "p": HTMLParagraphElement;
+    "param": HTMLParamElement;
+    "picture": HTMLPictureElement;
+    "pre": HTMLPreElement;
+    "progress": HTMLProgressElement;
+    "q": HTMLQuoteElement;
+    "script": HTMLScriptElement;
+    "select": HTMLSelectElement;
+    "source": HTMLSourceElement;
+    "span": HTMLSpanElement;
+    "style": HTMLStyleElement;
+    "table": HTMLTableElement;
+    "tbody": HTMLTableSectionElement;
+    "td": HTMLTableDataCellElement;
+    "template": HTMLTemplateElement;
+    "textarea": HTMLTextAreaElement;
+    "tfoot": HTMLTableSectionElement;
+    "th": HTMLTableHeaderCellElement;
+    "thead": HTMLTableSectionElement;
+    "time": HTMLTimeElement;
+    "title": HTMLTitleElement;
+    "tr": HTMLTableRowElement;
+    "track": HTMLTrackElement;
+    "ul": HTMLUListElement;
+    "video": HTMLVideoElement;
+    "x-ms-webview": MSHTMLWebViewElement;
+    "xmp": HTMLPreElement;
+}
+
+interface ElementTagNameMap extends HTMLElementTagNameMap {
+    "abbr": HTMLElement;
+    "acronym": HTMLElement;
+    "address": HTMLElement;
+    "article": HTMLElement;
+    "aside": HTMLElement;
+    "b": HTMLElement;
+    "bdo": HTMLElement;
+    "big": HTMLElement;
+    "center": HTMLElement;
+    "circle": SVGCircleElement;
+    "cite": HTMLElement;
+    "clippath": SVGClipPathElement;
+    "code": HTMLElement;
+    "dd": HTMLElement;
+    "defs": SVGDefsElement;
+    "desc": SVGDescElement;
+    "dfn": HTMLElement;
+    "dt": HTMLElement;
+    "ellipse": SVGEllipseElement;
+    "em": HTMLElement;
+    "feblend": SVGFEBlendElement;
+    "fecolormatrix": SVGFEColorMatrixElement;
+    "fecomponenttransfer": SVGFEComponentTransferElement;
+    "fecomposite": SVGFECompositeElement;
+    "feconvolvematrix": SVGFEConvolveMatrixElement;
+    "fediffuselighting": SVGFEDiffuseLightingElement;
+    "fedisplacementmap": SVGFEDisplacementMapElement;
+    "fedistantlight": SVGFEDistantLightElement;
+    "feflood": SVGFEFloodElement;
+    "fefunca": SVGFEFuncAElement;
+    "fefuncb": SVGFEFuncBElement;
+    "fefuncg": SVGFEFuncGElement;
+    "fefuncr": SVGFEFuncRElement;
+    "fegaussianblur": SVGFEGaussianBlurElement;
+    "feimage": SVGFEImageElement;
+    "femerge": SVGFEMergeElement;
+    "femergenode": SVGFEMergeNodeElement;
+    "femorphology": SVGFEMorphologyElement;
+    "feoffset": SVGFEOffsetElement;
+    "fepointlight": SVGFEPointLightElement;
+    "fespecularlighting": SVGFESpecularLightingElement;
+    "fespotlight": SVGFESpotLightElement;
+    "fetile": SVGFETileElement;
+    "feturbulence": SVGFETurbulenceElement;
+    "figcaption": HTMLElement;
+    "figure": HTMLElement;
+    "filter": SVGFilterElement;
+    "footer": HTMLElement;
+    "foreignobject": SVGForeignObjectElement;
+    "g": SVGGElement;
+    "header": HTMLElement;
+    "hgroup": HTMLElement;
+    "i": HTMLElement;
+    "image": SVGImageElement;
+    "kbd": HTMLElement;
+    "keygen": HTMLElement;
+    "line": SVGLineElement;
+    "lineargradient": SVGLinearGradientElement;
+    "mark": HTMLElement;
+    "marker": SVGMarkerElement;
+    "mask": SVGMaskElement;
+    "metadata": SVGMetadataElement;
+    "nav": HTMLElement;
+    "nobr": HTMLElement;
+    "noframes": HTMLElement;
+    "noscript": HTMLElement;
+    "path": SVGPathElement;
+    "pattern": SVGPatternElement;
+    "plaintext": HTMLElement;
+    "polygon": SVGPolygonElement;
+    "polyline": SVGPolylineElement;
+    "radialgradient": SVGRadialGradientElement;
+    "rect": SVGRectElement;
+    "rt": HTMLElement;
+    "ruby": HTMLElement;
+    "s": HTMLElement;
+    "samp": HTMLElement;
+    "section": HTMLElement;
+    "small": HTMLElement;
+    "stop": SVGStopElement;
+    "strike": HTMLElement;
+    "strong": HTMLElement;
+    "sub": HTMLElement;
+    "sup": HTMLElement;
+    "svg": SVGSVGElement;
+    "switch": SVGSwitchElement;
+    "symbol": SVGSymbolElement;
+    "text": SVGTextElement;
+    "textpath": SVGTextPathElement;
+    "tspan": SVGTSpanElement;
+    "tt": HTMLElement;
+    "u": HTMLElement;
+    "use": SVGUseElement;
+    "var": HTMLElement;
+    "view": SVGViewElement;
+    "wbr": HTMLElement;
+}
+
+type ElementListTagNameMap = {
+    [key in keyof ElementTagNameMap]: NodeListOf<ElementTagNameMap[key]>
+};
+
+declare var Audio: { new(src?: string): HTMLAudioElement; };
+declare var Image: { new(width?: number, height?: number): HTMLImageElement; };
+declare var Option: { new(text?: string, value?: string, defaultSelected?: boolean, selected?: boolean): HTMLOptionElement; };
+declare var applicationCache: ApplicationCache;
+declare var caches: CacheStorage;
+declare var clientInformation: Navigator;
+declare var closed: boolean;
+declare var crypto: Crypto;
+declare var defaultStatus: string;
+declare var devicePixelRatio: number;
+declare var document: Document;
+declare var doNotTrack: string;
+declare var event: Event | undefined;
+declare var external: External;
+declare var frameElement: Element;
+declare var frames: Window;
+declare var history: History;
+declare var innerHeight: number;
+declare var innerWidth: number;
+declare var isSecureContext: boolean;
+declare var length: number;
+declare var location: Location;
+declare var locationbar: BarProp;
+declare var menubar: BarProp;
+declare var msContentScript: ExtensionScriptApis;
+declare var msCredentials: MSCredentials;
+declare const name: never;
+declare var navigator: Navigator;
+declare var offscreenBuffering: string | boolean;
+declare var onabort: (this: Window, ev: UIEvent) => any;
+declare var onafterprint: (this: Window, ev: Event) => any;
+declare var onbeforeprint: (this: Window, ev: Event) => any;
+declare var onbeforeunload: (this: Window, ev: BeforeUnloadEvent) => any;
+declare var onblur: (this: Window, ev: FocusEvent) => any;
+declare var oncanplay: (this: Window, ev: Event) => any;
+declare var oncanplaythrough: (this: Window, ev: Event) => any;
+declare var onchange: (this: Window, ev: Event) => any;
+declare var onclick: (this: Window, ev: MouseEvent) => any;
+declare var oncompassneedscalibration: (this: Window, ev: Event) => any;
+declare var oncontextmenu: (this: Window, ev: PointerEvent) => any;
+declare var ondblclick: (this: Window, ev: MouseEvent) => any;
+declare var ondevicelight: (this: Window, ev: DeviceLightEvent) => any;
+declare var ondevicemotion: (this: Window, ev: DeviceMotionEvent) => any;
+declare var ondeviceorientation: (this: Window, ev: DeviceOrientationEvent) => any;
+declare var ondrag: (this: Window, ev: DragEvent) => any;
+declare var ondragend: (this: Window, ev: DragEvent) => any;
+declare var ondragenter: (this: Window, ev: DragEvent) => any;
+declare var ondragleave: (this: Window, ev: DragEvent) => any;
+declare var ondragover: (this: Window, ev: DragEvent) => any;
+declare var ondragstart: (this: Window, ev: DragEvent) => any;
+declare var ondrop: (this: Window, ev: DragEvent) => any;
+declare var ondurationchange: (this: Window, ev: Event) => any;
+declare var onemptied: (this: Window, ev: Event) => any;
+declare var onended: (this: Window, ev: MediaStreamErrorEvent) => any;
+declare var onerror: ErrorEventHandler;
+declare var onfocus: (this: Window, ev: FocusEvent) => any;
+declare var onhashchange: (this: Window, ev: HashChangeEvent) => any;
+declare var oninput: (this: Window, ev: Event) => any;
+declare var oninvalid: (this: Window, ev: Event) => any;
+declare var onkeydown: (this: Window, ev: KeyboardEvent) => any;
+declare var onkeypress: (this: Window, ev: KeyboardEvent) => any;
+declare var onkeyup: (this: Window, ev: KeyboardEvent) => any;
+declare var onload: (this: Window, ev: Event) => any;
+declare var onloadeddata: (this: Window, ev: Event) => any;
+declare var onloadedmetadata: (this: Window, ev: Event) => any;
+declare var onloadstart: (this: Window, ev: Event) => any;
+declare var onmessage: (this: Window, ev: MessageEvent) => any;
+declare var onmousedown: (this: Window, ev: MouseEvent) => any;
+declare var onmouseenter: (this: Window, ev: MouseEvent) => any;
+declare var onmouseleave: (this: Window, ev: MouseEvent) => any;
+declare var onmousemove: (this: Window, ev: MouseEvent) => any;
+declare var onmouseout: (this: Window, ev: MouseEvent) => any;
+declare var onmouseover: (this: Window, ev: MouseEvent) => any;
+declare var onmouseup: (this: Window, ev: MouseEvent) => any;
+declare var onmousewheel: (this: Window, ev: WheelEvent) => any;
+declare var onmsgesturechange: (this: Window, ev: MSGestureEvent) => any;
+declare var onmsgesturedoubletap: (this: Window, ev: MSGestureEvent) => any;
+declare var onmsgestureend: (this: Window, ev: MSGestureEvent) => any;
+declare var onmsgesturehold: (this: Window, ev: MSGestureEvent) => any;
+declare var onmsgesturestart: (this: Window, ev: MSGestureEvent) => any;
+declare var onmsgesturetap: (this: Window, ev: MSGestureEvent) => any;
+declare var onmsinertiastart: (this: Window, ev: MSGestureEvent) => any;
+declare var onmspointercancel: (this: Window, ev: MSPointerEvent) => any;
+declare var onmspointerdown: (this: Window, ev: MSPointerEvent) => any;
+declare var onmspointerenter: (this: Window, ev: MSPointerEvent) => any;
+declare var onmspointerleave: (this: Window, ev: MSPointerEvent) => any;
+declare var onmspointermove: (this: Window, ev: MSPointerEvent) => any;
+declare var onmspointerout: (this: Window, ev: MSPointerEvent) => any;
+declare var onmspointerover: (this: Window, ev: MSPointerEvent) => any;
+declare var onmspointerup: (this: Window, ev: MSPointerEvent) => any;
+declare var onoffline: (this: Window, ev: Event) => any;
+declare var ononline: (this: Window, ev: Event) => any;
+declare var onorientationchange: (this: Window, ev: Event) => any;
+declare var onpagehide: (this: Window, ev: PageTransitionEvent) => any;
+declare var onpageshow: (this: Window, ev: PageTransitionEvent) => any;
+declare var onpause: (this: Window, ev: Event) => any;
+declare var onplay: (this: Window, ev: Event) => any;
+declare var onplaying: (this: Window, ev: Event) => any;
+declare var onpopstate: (this: Window, ev: PopStateEvent) => any;
+declare var onprogress: (this: Window, ev: ProgressEvent) => any;
+declare var onratechange: (this: Window, ev: Event) => any;
+declare var onreadystatechange: (this: Window, ev: ProgressEvent) => any;
+declare var onreset: (this: Window, ev: Event) => any;
+declare var onresize: (this: Window, ev: UIEvent) => any;
+declare var onscroll: (this: Window, ev: UIEvent) => any;
+declare var onseeked: (this: Window, ev: Event) => any;
+declare var onseeking: (this: Window, ev: Event) => any;
+declare var onselect: (this: Window, ev: UIEvent) => any;
+declare var onstalled: (this: Window, ev: Event) => any;
+declare var onstorage: (this: Window, ev: StorageEvent) => any;
+declare var onsubmit: (this: Window, ev: Event) => any;
+declare var onsuspend: (this: Window, ev: Event) => any;
+declare var ontimeupdate: (this: Window, ev: Event) => any;
+declare var ontouchcancel: (ev: TouchEvent) => any;
+declare var ontouchend: (ev: TouchEvent) => any;
+declare var ontouchmove: (ev: TouchEvent) => any;
+declare var ontouchstart: (ev: TouchEvent) => any;
+declare var onunload: (this: Window, ev: Event) => any;
+declare var onvolumechange: (this: Window, ev: Event) => any;
+declare var onwaiting: (this: Window, ev: Event) => any;
+declare var opener: any;
+declare var orientation: string | number;
+declare var outerHeight: number;
+declare var outerWidth: number;
+declare var pageXOffset: number;
+declare var pageYOffset: number;
+declare var parent: Window;
+declare var performance: Performance;
+declare var personalbar: BarProp;
+declare var screen: Screen;
+declare var screenLeft: number;
+declare var screenTop: number;
+declare var screenX: number;
+declare var screenY: number;
+declare var scrollbars: BarProp;
+declare var scrollX: number;
+declare var scrollY: number;
+declare var self: Window;
+declare var speechSynthesis: SpeechSynthesis;
+declare var status: string;
+declare var statusbar: BarProp;
+declare var styleMedia: StyleMedia;
+declare var toolbar: BarProp;
+declare var top: Window;
+declare var window: Window;
+declare var customElements: CustomElementRegistry;
+declare function alert(message?: any): void;
+declare function blur(): void;
+declare function cancelAnimationFrame(handle: number): void;
+declare function captureEvents(): void;
+declare function close(): void;
+declare function confirm(message?: string): boolean;
+declare function departFocus(navigationReason: NavigationReason, origin: FocusNavigationOrigin): void;
+declare function focus(): void;
+declare function getComputedStyle(elt: Element, pseudoElt?: string): CSSStyleDeclaration;
+declare function getMatchedCSSRules(elt: Element, pseudoElt?: string): CSSRuleList;
+declare function getSelection(): Selection;
+declare function matchMedia(mediaQuery: string): MediaQueryList;
+declare function moveBy(x?: number, y?: number): void;
+declare function moveTo(x?: number, y?: number): void;
+declare function msWriteProfilerMark(profilerMarkName: string): void;
+declare function open(url?: string, target?: string, features?: string, replace?: boolean): Window;
+declare function postMessage(message: any, targetOrigin: string, transfer?: any[]): void;
+declare function print(): void;
+declare function prompt(message?: string, _default?: string): string | null;
+declare function releaseEvents(): void;
+declare function requestAnimationFrame(callback: FrameRequestCallback): number;
+declare function resizeBy(x?: number, y?: number): void;
+declare function resizeTo(x?: number, y?: number): void;
+declare function scroll(x?: number, y?: number): void;
+declare function scrollBy(x?: number, y?: number): void;
+declare function scrollTo(x?: number, y?: number): void;
+declare function stop(): void;
+declare function webkitCancelAnimationFrame(handle: number): void;
+declare function webkitConvertPointFromNodeToPage(node: Node, pt: WebKitPoint): WebKitPoint;
+declare function webkitConvertPointFromPageToNode(node: Node, pt: WebKitPoint): WebKitPoint;
+declare function webkitRequestAnimationFrame(callback: FrameRequestCallback): number;
+declare function createImageBitmap(image: HTMLImageElement | SVGImageElement | HTMLVideoElement | HTMLCanvasElement | ImageBitmap | ImageData | Blob, options?: ImageBitmapOptions): Promise<ImageBitmap>;
+declare function createImageBitmap(image: HTMLImageElement | SVGImageElement | HTMLVideoElement | HTMLCanvasElement | ImageBitmap | ImageData | Blob, sx: number, sy: number, sw: number, sh: number, options?: ImageBitmapOptions): Promise<ImageBitmap>;
+declare function scroll(options?: ScrollToOptions): void;
+declare function scrollTo(options?: ScrollToOptions): void;
+declare function scrollBy(options?: ScrollToOptions): void;
+declare function toString(): string;
+declare function dispatchEvent(evt: Event): boolean;
+declare function removeEventListener(type: string, listener?: EventListenerOrEventListenerObject, options?: boolean | EventListenerOptions): void;
+declare function clearInterval(handle: number): void;
+declare function clearTimeout(handle: number): void;
+declare function setInterval(handler: (...args: any[]) => void, timeout: number): number;
+declare function setInterval(handler: any, timeout?: any, ...args: any[]): number;
+declare function setTimeout(handler: (...args: any[]) => void, timeout: number): number;
+declare function setTimeout(handler: any, timeout?: any, ...args: any[]): number;
+declare function clearImmediate(handle: number): void;
+declare function setImmediate(handler: (...args: any[]) => void): number;
+declare function setImmediate(handler: any, ...args: any[]): number;
+declare var sessionStorage: Storage;
+declare var localStorage: Storage;
+declare var console: Console;
+declare var onpointercancel: (this: Window, ev: PointerEvent) => any;
+declare var onpointerdown: (this: Window, ev: PointerEvent) => any;
+declare var onpointerenter: (this: Window, ev: PointerEvent) => any;
+declare var onpointerleave: (this: Window, ev: PointerEvent) => any;
+declare var onpointermove: (this: Window, ev: PointerEvent) => any;
+declare var onpointerout: (this: Window, ev: PointerEvent) => any;
+declare var onpointerover: (this: Window, ev: PointerEvent) => any;
+declare var onpointerup: (this: Window, ev: PointerEvent) => any;
+declare var onwheel: (this: Window, ev: WheelEvent) => any;
+declare var indexedDB: IDBFactory;
+declare function atob(encodedString: string): string;
+declare function btoa(rawString: string): string;
+declare function fetch(input: RequestInfo, init?: RequestInit): Promise<Response>;
+declare function addEventListener<K extends keyof WindowEventMap>(type: K, listener: (this: Window, ev: WindowEventMap[K]) => any, useCapture?: boolean): void;
+declare function addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+type AAGUID = string;
+type AlgorithmIdentifier = string | Algorithm;
+type BodyInit = any;
+type ByteString = string;
+type ConstrainBoolean = boolean | ConstrainBooleanParameters;
+type ConstrainDOMString = string | string[] | ConstrainDOMStringParameters;
+type ConstrainDouble = number | ConstrainDoubleRange;
+type ConstrainLong = number | ConstrainLongRange;
+type CryptoOperationData = ArrayBufferView;
+type GLbitfield = number;
+type GLboolean = boolean;
+type GLbyte = number;
+type GLclampf = number;
+type GLenum = number;
+type GLfloat = number;
+type GLint = number;
+type GLintptr = number;
+type GLshort = number;
+type GLsizei = number;
+type GLsizeiptr = number;
+type GLubyte = number;
+type GLuint = number;
+type GLushort = number;
+type HeadersInit = any;
+type IDBKeyPath = string;
+type KeyFormat = string;
+type KeyType = string;
+type KeyUsage = string;
+type MSInboundPayload = MSVideoRecvPayload | MSAudioRecvPayload;
+type MSLocalClientEvent = MSLocalClientEventBase | MSAudioLocalClientEvent;
+type MSOutboundPayload = MSVideoSendPayload | MSAudioSendPayload;
+type RTCIceGatherCandidate = RTCIceCandidateDictionary | RTCIceCandidateComplete;
+type RTCTransport = RTCDtlsTransport | RTCSrtpSdesTransport;
+type RequestInfo = Request | string;
+type USVString = string;
+type payloadtype = number;
+type ScrollBehavior = "auto" | "instant" | "smooth";
+type ScrollLogicalPosition = "start" | "center" | "end" | "nearest";
+type IDBValidKey = number | string | Date | IDBArrayKey;
+type BufferSource = ArrayBuffer | ArrayBufferView;
+type MouseWheelEvent = WheelEvent;
+type ScrollRestoration = "auto" | "manual";
+type FormDataEntryValue = string | File;
+type InsertPosition = "beforebegin" | "afterbegin" | "beforeend" | "afterend";
+type AppendMode = "segments" | "sequence";
+type AudioContextState = "suspended" | "running" | "closed";
+type BiquadFilterType = "lowpass" | "highpass" | "bandpass" | "lowshelf" | "highshelf" | "peaking" | "notch" | "allpass";
+type CanvasFillRule = "nonzero" | "evenodd";
+type ChannelCountMode = "max" | "clamped-max" | "explicit";
+type ChannelInterpretation = "speakers" | "discrete";
+type DistanceModelType = "linear" | "inverse" | "exponential";
+type ExpandGranularity = "character" | "word" | "sentence" | "textedit";
+type GamepadInputEmulationType = "mouse" | "keyboard" | "gamepad";
+type IDBCursorDirection = "next" | "nextunique" | "prev" | "prevunique";
+type IDBRequestReadyState = "pending" | "done";
+type IDBTransactionMode = "readonly" | "readwrite" | "versionchange";
+type ListeningState = "inactive" | "active" | "disambiguation";
+type MediaDeviceKind = "audioinput" | "audiooutput" | "videoinput";
+type MediaKeyMessageType = "license-request" | "license-renewal" | "license-release" | "individualization-request";
+type MediaKeySessionType = "temporary" | "persistent-license" | "persistent-release-message";
+type MediaKeysRequirement = "required" | "optional" | "not-allowed";
+type MediaKeyStatus = "usable" | "expired" | "output-downscaled" | "output-not-allowed" | "status-pending" | "internal-error";
+type MediaStreamTrackState = "live" | "ended";
+type MSCredentialType = "FIDO_2_0";
+type MSIceAddrType = "os" | "stun" | "turn" | "peer-derived";
+type MSIceType = "failed" | "direct" | "relay";
+type MSStatsType = "description" | "localclientevent" | "inbound-network" | "outbound-network" | "inbound-payload" | "outbound-payload" | "transportdiagnostics";
+type MSTransportType = "Embedded" | "USB" | "NFC" | "BT";
+type MSWebViewPermissionState = "unknown" | "defer" | "allow" | "deny";
+type MSWebViewPermissionType = "geolocation" | "unlimitedIndexedDBQuota" | "media" | "pointerlock" | "webnotifications";
+type NavigationReason = "up" | "down" | "left" | "right";
+type NavigationType = "navigate" | "reload" | "back_forward" | "prerender";
+type NotificationDirection = "auto" | "ltr" | "rtl";
+type NotificationPermission = "default" | "denied" | "granted";
+type OscillatorType = "sine" | "square" | "sawtooth" | "triangle" | "custom";
+type OverSampleType = "none" | "2x" | "4x";
+type PanningModelType = "equalpower";
+type PaymentComplete = "success" | "fail" | "";
+type PaymentShippingType = "shipping" | "delivery" | "pickup";
+type PushEncryptionKeyName = "p256dh" | "auth";
+type PushPermissionState = "granted" | "denied" | "prompt";
+type ReferrerPolicy = "" | "no-referrer" | "no-referrer-when-downgrade" | "origin-only" | "origin-when-cross-origin" | "unsafe-url";
+type RequestCache = "default" | "no-store" | "reload" | "no-cache" | "force-cache";
+type RequestCredentials = "omit" | "same-origin" | "include";
+type RequestDestination = "" | "document" | "sharedworker" | "subresource" | "unknown" | "worker";
+type RequestMode = "navigate" | "same-origin" | "no-cors" | "cors";
+type RequestRedirect = "follow" | "error" | "manual";
+type RequestType = "" | "audio" | "font" | "image" | "script" | "style" | "track" | "video";
+type ResponseType = "basic" | "cors" | "default" | "error" | "opaque" | "opaqueredirect";
+type RTCBundlePolicy = "balanced" | "max-compat" | "max-bundle";
+type RTCDegradationPreference = "maintain-framerate" | "maintain-resolution" | "balanced";
+type RTCDtlsRole = "auto" | "client" | "server";
+type RTCDtlsTransportState = "new" | "connecting" | "connected" | "closed";
+type RTCIceCandidateType = "host" | "srflx" | "prflx" | "relay";
+type RTCIceComponent = "RTP" | "RTCP";
+type RTCIceConnectionState = "new" | "checking" | "connected" | "completed" | "failed" | "disconnected" | "closed";
+type RTCIceGathererState = "new" | "gathering" | "complete";
+type RTCIceGatheringState = "new" | "gathering" | "complete";
+type RTCIceGatherPolicy = "all" | "nohost" | "relay";
+type RTCIceProtocol = "udp" | "tcp";
+type RTCIceRole = "controlling" | "controlled";
+type RTCIceTcpCandidateType = "active" | "passive" | "so";
+type RTCIceTransportPolicy = "none" | "relay" | "all";
+type RTCIceTransportState = "new" | "checking" | "connected" | "completed" | "disconnected" | "closed";
+type RTCSdpType = "offer" | "pranswer" | "answer";
+type RTCSignalingState = "stable" | "have-local-offer" | "have-remote-offer" | "have-local-pranswer" | "have-remote-pranswer" | "closed";
+type RTCStatsIceCandidatePairState = "frozen" | "waiting" | "inprogress" | "failed" | "succeeded" | "cancelled";
+type RTCStatsIceCandidateType = "host" | "serverreflexive" | "peerreflexive" | "relayed";
+type RTCStatsType = "inboundrtp" | "outboundrtp" | "session" | "datachannel" | "track" | "transport" | "candidatepair" | "localcandidate" | "remotecandidate";
+type ScopedCredentialType = "ScopedCred";
+type ServiceWorkerState = "installing" | "installed" | "activating" | "activated" | "redundant";
+type Transport = "usb" | "nfc" | "ble";
+type VideoFacingModeEnum = "user" | "environment" | "left" | "right";
+type VisibilityState = "hidden" | "visible" | "prerender" | "unloaded";
+type XMLHttpRequestResponseType = "" | "arraybuffer" | "blob" | "document" | "json" | "text";
+
+
+/////////////////////////////
+/// WorkerGlobalScope APIs
+/////////////////////////////
+// These are only available in a Web Worker
+declare function importScripts(...urls: string[]): void;
+
+
+
+
+/////////////////////////////
+/// Windows Script Host APIS
+/////////////////////////////
+
+
+interface ActiveXObject {
+    new (s: string): any;
+}
+declare var ActiveXObject: ActiveXObject;
+
+interface ITextWriter {
+    Write(s: string): void;
+    WriteLine(s: string): void;
+    Close(): void;
+}
+
+interface TextStreamBase {
+    /**
+     * The column number of the current character position in an input stream.
+     */
+    Column: number;
+
+    /**
+     * The current line number in an input stream.
+     */
+    Line: number;
+
+    /**
+     * Closes a text stream.
+     * It is not necessary to close standard streams; they close automatically when the process ends. If
+     * you close a standard stream, be aware that any other pointers to that standard stream become invalid.
+     */
+    Close(): void;
+}
+
+interface TextStreamWriter extends TextStreamBase {
+    /**
+     * Sends a string to an output stream.
+     */
+    Write(s: string): void;
+
+    /**
+     * Sends a specified number of blank lines (newline characters) to an output stream.
+     */
+    WriteBlankLines(intLines: number): void;
+
+    /**
+     * Sends a string followed by a newline character to an output stream.
+     */
+    WriteLine(s: string): void;
+}
+
+interface TextStreamReader extends TextStreamBase {
+    /**
+     * Returns a specified number of characters from an input stream, starting at the current pointer position.
+     * Does not return until the ENTER key is pressed.
+     * Can only be used on a stream in reading mode; causes an error in writing or appending mode.
+     */
+    Read(characters: number): string;
+
+    /**
+     * Returns all characters from an input stream.
+     * Can only be used on a stream in reading mode; causes an error in writing or appending mode.
+     */
+    ReadAll(): string;
+
+    /**
+     * Returns an entire line from an input stream.
+     * Although this method extracts the newline character, it does not add it to the returned string.
+     * Can only be used on a stream in reading mode; causes an error in writing or appending mode.
+     */
+    ReadLine(): string;
+
+    /**
+     * Skips a specified number of characters when reading from an input text stream.
+     * Can only be used on a stream in reading mode; causes an error in writing or appending mode.
+     * @param characters Positive number of characters to skip forward. (Backward skipping is not supported.)
+     */
+    Skip(characters: number): void;
+
+    /**
+     * Skips the next line when reading from an input text stream.
+     * Can only be used on a stream in reading mode, not writing or appending mode.
+     */
+    SkipLine(): void;
+
+    /**
+     * Indicates whether the stream pointer position is at the end of a line.
+     */
+    AtEndOfLine: boolean;
+
+    /**
+     * Indicates whether the stream pointer position is at the end of a stream.
+     */
+    AtEndOfStream: boolean;
+}
+
+declare var WScript: {
+    /**
+     * Outputs text to either a message box (under WScript.exe) or the command console window followed by
+     * a newline (under CScript.exe).
+     */
+    Echo(s: any): void;
+
+    /**
+     * Exposes the write-only error output stream for the current script.
+     * Can be accessed only while using CScript.exe.
+     */
+    StdErr: TextStreamWriter;
+
+    /**
+     * Exposes the write-only output stream for the current script.
+     * Can be accessed only while using CScript.exe.
+     */
+    StdOut: TextStreamWriter;
+    Arguments: { length: number; Item(n: number): string; };
+
+    /**
+     *  The full path of the currently running script.
+     */
+    ScriptFullName: string;
+
+    /**
+     * Forces the script to stop immediately, with an optional exit code.
+     */
+    Quit(exitCode?: number): number;
+
+    /**
+     * The Windows Script Host build version number.
+     */
+    BuildVersion: number;
+
+    /**
+     * Fully qualified path of the host executable.
+     */
+    FullName: string;
+
+    /**
+     * Gets/sets the script mode - interactive(true) or batch(false).
+     */
+    Interactive: boolean;
+
+    /**
+     * The name of the host executable (WScript.exe or CScript.exe).
+     */
+    Name: string;
+
+    /**
+     * Path of the directory containing the host executable.
+     */
+    Path: string;
+
+    /**
+     * The filename of the currently running script.
+     */
+    ScriptName: string;
+
+    /**
+     * Exposes the read-only input stream for the current script.
+     * Can be accessed only while using CScript.exe.
+     */
+    StdIn: TextStreamReader;
+
+    /**
+     * Windows Script Host version
+     */
+    Version: string;
+
+    /**
+     * Connects a COM object's event sources to functions named with a given prefix, in the form prefix_event.
+     */
+    ConnectObject(objEventSource: any, strPrefix: string): void;
+
+    /**
+     * Creates a COM object.
+     * @param strProgiID
+     * @param strPrefix Function names in the form prefix_event will be bound to this object's COM events.
+     */
+    CreateObject(strProgID: string, strPrefix?: string): any;
+
+    /**
+     * Disconnects a COM object from its event sources.
+     */
+    DisconnectObject(obj: any): void;
+
+    /**
+     * Retrieves an existing object with the specified ProgID from memory, or creates a new one from a file.
+     * @param strPathname Fully qualified path to the file containing the object persisted to disk.
+     *                       For objects in memory, pass a zero-length string.
+     * @param strProgID
+     * @param strPrefix Function names in the form prefix_event will be bound to this object's COM events.
+     */
+    GetObject(strPathname: string, strProgID?: string, strPrefix?: string): any;
+
+    /**
+     * Suspends script execution for a specified length of time, then continues execution.
+     * @param intTime Interval (in milliseconds) to suspend script execution.
+     */
+    Sleep(intTime: number): void;
+};
+
+/**
+ * Allows enumerating over a COM collection, which may not have indexed item access.
+ */
+interface Enumerator<T> {
+    /**
+     * Returns true if the current item is the last one in the collection, or the collection is empty,
+     * or the current item is undefined.
+     */
+    atEnd(): boolean;
+
+    /**
+     * Returns the current item in the collection
+     */
+    item(): T;
+
+    /**
+     * Resets the current item in the collection to the first item. If there are no items in the collection,
+     * the current item is set to undefined.
+     */
+    moveFirst(): void;
+
+    /**
+     * Moves the current item to the next item in the collection. If the enumerator is at the end of
+     * the collection or the collection is empty, the current item is set to undefined.
+     */
+    moveNext(): void;
+}
+
+interface EnumeratorConstructor {
+    new <T>(collection: any): Enumerator<T>;
+    new (collection: any): Enumerator<any>;
+}
+
+declare var Enumerator: EnumeratorConstructor;
+
+/**
+ * Enables reading from a COM safe array, which might have an alternate lower bound, or multiple dimensions.
+ */
+interface VBArray<T> {
+    /**
+     * Returns the number of dimensions (1-based).
+     */
+    dimensions(): number;
+
+    /**
+     * Takes an index for each dimension in the array, and returns the item at the corresponding location.
+     */
+    getItem(dimension1Index: number, ...dimensionNIndexes: number[]): T;
+
+    /**
+     * Returns the smallest available index for a given dimension.
+     * @param dimension 1-based dimension (defaults to 1)
+     */
+    lbound(dimension?: number): number;
+
+    /**
+     * Returns the largest available index for a given dimension.
+     * @param dimension 1-based dimension (defaults to 1)
+     */
+    ubound(dimension?: number): number;
+
+    /**
+     * Returns a Javascript array with all the elements in the VBArray. If there are multiple dimensions,
+     * each successive dimension is appended to the end of the array.
+     * Example: [[1,2,3],[4,5,6]] becomes [1,2,3,4,5,6]
+     */
+    toArray(): T[];
+}
+
+interface VBArrayConstructor {
+    new <T>(safeArray: any): VBArray<T>;
+    new (safeArray: any): VBArray<any>;
+}
+
+declare var VBArray: VBArrayConstructor;
+
+/**
+ * Automation date (VT_DATE)
+ */
+interface VarDate { }
+
+interface DateConstructor {
+    new (vd: VarDate): Date;
+}
+
+interface Date {
+    getVarDate: () => VarDate;
+}
+
+
+/// <reference path="lib.dom.d.ts" />
+
+interface DOMTokenList {
+    [Symbol.iterator](): IterableIterator<string>;
+}
+
+interface FormData {
+    /**
+     * Returns an array of key, value pairs for every entry in the list
+     */
+    entries(): IterableIterator<[string, string | File]>;
+    /**
+     * Returns a list of keys in the list
+     */
+    keys(): IterableIterator<string>;
+    /**
+     * Returns a list of values in the list
+     */
+    values(): IterableIterator<string | File>;
+
+    [Symbol.iterator](): IterableIterator<string | File>;
+}
+
+interface Headers {
+    [Symbol.iterator](): IterableIterator<[string, string]>;
+    /**
+     * Returns an iterator allowing to go through all key/value pairs contained in this object.
+     */
+    entries(): IterableIterator<[string, string]>;
+    /**
+     * Returns an iterator allowing to go through all keys f the key/value pairs contained in this object.
+     */
+    keys(): IterableIterator<string>;
+    /**
+     * Returns an iterator allowing to go through all values of the key/value pairs contained in this object.
+     */
+    values(): IterableIterator<string>;
+}
+
+interface NodeList {
+    /**
+     * Returns an array of key, value pairs for every entry in the list
+     */
+    entries(): IterableIterator<[number, Node]>;
+    /**
+     * Performs the specified action for each node in an list.
+     * @param callbackfn  A function that accepts up to three arguments. forEach calls the callbackfn function one time for each element in the list.
+     * @param thisArg  An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
+     */
+    forEach(callbackfn: (value: Node, index: number, listObj: NodeList) => void, thisArg?: any): void;
+    /**
+     * Returns an list of keys in the list
+     */
+    keys(): IterableIterator<number>;
+
+    /**
+     * Returns an list of values in the list
+     */
+    values(): IterableIterator<Node>;
+
+
+    [Symbol.iterator](): IterableIterator<Node>;
+}
+
+interface NodeListOf<TNode extends Node> {
+
+    /**
+     * Returns an array of key, value pairs for every entry in the list
+     */
+    entries(): IterableIterator<[number, TNode]>;
+
+    /**
+     * Performs the specified action for each node in an list.
+     * @param callbackfn  A function that accepts up to three arguments. forEach calls the callbackfn function one time for each element in the list.
+     * @param thisArg  An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
+     */
+    forEach(callbackfn: (value: TNode, index: number, listObj: NodeListOf<TNode>) => void, thisArg?: any): void;
+    /**
+     * Returns an list of keys in the list
+     */
+    keys(): IterableIterator<number>;
+    /**
+     * Returns an list of values in the list
+     */
+    values(): IterableIterator<TNode>;
+
+    [Symbol.iterator](): IterableIterator<TNode>;
+}
+
+interface URLSearchParams {
+    /**
+     * Returns an array of key, value pairs for every entry in the search params
+     */
+    entries(): IterableIterator<[string, string]>;
+    /**
+     * Returns a list of keys in the search params
+     */
+    keys(): IterableIterator<string>;
+    /**
+     * Returns a list of values in the search params
+     */
+    values(): IterableIterator<string>;
+    /**
+     * iterate over key/value pairs
+     */
+    [Symbol.iterator](): IterableIterator<[string, string]>;
+}
diff --git a/bin/lib.scripthost.d.ts b/bin/lib.scripthost.d.ts
index b4e52a3..47cfaa7 100644
--- a/bin/lib.scripthost.d.ts
+++ b/bin/lib.scripthost.d.ts
@@ -1,307 +1,311 @@
-/*! *****************************************************************************
-Copyright (c) Microsoft Corporation. All rights reserved. 
-Licensed under the Apache License, Version 2.0 (the "License"); you may not use
-this file except in compliance with the License. You may obtain a copy of the
-License at http://www.apache.org/licenses/LICENSE-2.0  
- 
-THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
-WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
-MERCHANTABLITY OR NON-INFRINGEMENT. 
- 
-See the Apache Version 2.0 License for specific language governing permissions
-and limitations under the License.
-***************************************************************************** */
-
-/// <reference no-default-lib="true"/>
-
-
-/////////////////////////////
-/// Windows Script Host APIS
-/////////////////////////////
-
-
-interface ActiveXObject {
-    new (s: string): any;
-}
-declare var ActiveXObject: ActiveXObject;
-
-interface ITextWriter {
-    Write(s: string): void;
-    WriteLine(s: string): void;
-    Close(): void;
-}
-
-interface TextStreamBase {
-    /**
-     * The column number of the current character position in an input stream.
-     */
-    Column: number;
-
-    /**
-     * The current line number in an input stream.
-     */
-    Line: number;
-
-    /**
-     * Closes a text stream.
-     * It is not necessary to close standard streams; they close automatically when the process ends. If 
-     * you close a standard stream, be aware that any other pointers to that standard stream become invalid.
-     */
-    Close(): void;
-}
-
-interface TextStreamWriter extends TextStreamBase {
-    /**
-     * Sends a string to an output stream.
-     */
-    Write(s: string): void;
-
-    /**
-     * Sends a specified number of blank lines (newline characters) to an output stream.
-     */
-    WriteBlankLines(intLines: number): void;
-
-    /**
-     * Sends a string followed by a newline character to an output stream.
-     */
-    WriteLine(s: string): void;
-}
-
-interface TextStreamReader extends TextStreamBase {
-    /**
-     * Returns a specified number of characters from an input stream, starting at the current pointer position.
-     * Does not return until the ENTER key is pressed.
-     * Can only be used on a stream in reading mode; causes an error in writing or appending mode.
-     */
-    Read(characters: number): string;
-
-    /**
-     * Returns all characters from an input stream.
-     * Can only be used on a stream in reading mode; causes an error in writing or appending mode.
-     */
-    ReadAll(): string;
-
-    /**
-     * Returns an entire line from an input stream.
-     * Although this method extracts the newline character, it does not add it to the returned string.
-     * Can only be used on a stream in reading mode; causes an error in writing or appending mode.
-     */
-    ReadLine(): string;
-
-    /**
-     * Skips a specified number of characters when reading from an input text stream.
-     * Can only be used on a stream in reading mode; causes an error in writing or appending mode.
-     * @param characters Positive number of characters to skip forward. (Backward skipping is not supported.)
-     */
-    Skip(characters: number): void;
-
-    /**
-     * Skips the next line when reading from an input text stream.
-     * Can only be used on a stream in reading mode, not writing or appending mode.
-     */
-    SkipLine(): void;
-
-    /**
-     * Indicates whether the stream pointer position is at the end of a line.
-     */
-    AtEndOfLine: boolean;
-
-    /**
-     * Indicates whether the stream pointer position is at the end of a stream.
-     */
-    AtEndOfStream: boolean;
-}
-
-declare var WScript: {
-    /**
-    * Outputs text to either a message box (under WScript.exe) or the command console window followed by
-    * a newline (under CScript.exe).
-    */
-    Echo(s: any): void;
-
-    /**
-     * Exposes the write-only error output stream for the current script.
-     * Can be accessed only while using CScript.exe.
-     */
-    StdErr: TextStreamWriter;
-
-    /**
-     * Exposes the write-only output stream for the current script.
-     * Can be accessed only while using CScript.exe.
-     */
-    StdOut: TextStreamWriter;
-    Arguments: { length: number; Item(n: number): string; };
-
-    /**
-     *  The full path of the currently running script.
-     */
-    ScriptFullName: string;
-
-    /**
-     * Forces the script to stop immediately, with an optional exit code.
-     */
-    Quit(exitCode?: number): number;
-
-    /**
-     * The Windows Script Host build version number.
-     */
-    BuildVersion: number;
-
-    /**
-     * Fully qualified path of the host executable.
-     */
-    FullName: string;
-
-    /**
-     * Gets/sets the script mode - interactive(true) or batch(false).
-     */
-    Interactive: boolean;
-
-    /**
-     * The name of the host executable (WScript.exe or CScript.exe).
-     */
-    Name: string;
-
-    /**
-     * Path of the directory containing the host executable.
-     */
-    Path: string;
-
-    /**
-     * The filename of the currently running script.
-     */
-    ScriptName: string;
-
-    /**
-     * Exposes the read-only input stream for the current script.
-     * Can be accessed only while using CScript.exe.
-     */
-    StdIn: TextStreamReader;
-
-    /**
-     * Windows Script Host version
-     */
-    Version: string;
-
-    /**
-     * Connects a COM object's event sources to functions named with a given prefix, in the form prefix_event.
-     */
-    ConnectObject(objEventSource: any, strPrefix: string): void;
-
-    /**
-     * Creates a COM object.
-     * @param strProgiID
-     * @param strPrefix Function names in the form prefix_event will be bound to this object's COM events.
-     */
-    CreateObject(strProgID: string, strPrefix?: string): any;
-
-    /**
-     * Disconnects a COM object from its event sources.
-     */
-    DisconnectObject(obj: any): void;
-
-    /**
-     * Retrieves an existing object with the specified ProgID from memory, or creates a new one from a file.
-     * @param strPathname Fully qualified path to the file containing the object persisted to disk.
-     *                       For objects in memory, pass a zero-length string.
-     * @param strProgID
-     * @param strPrefix Function names in the form prefix_event will be bound to this object's COM events.
-     */
-    GetObject(strPathname: string, strProgID?: string, strPrefix?: string): any;
-
-    /**
-     * Suspends script execution for a specified length of time, then continues execution.
-     * @param intTime Interval (in milliseconds) to suspend script execution.
-     */
-    Sleep(intTime: number): void;
-};
-
-/**
- * Allows enumerating over a COM collection, which may not have indexed item access.
- */
-interface Enumerator<T> {
-    /**
-     * Returns true if the current item is the last one in the collection, or the collection is empty,
-     * or the current item is undefined.
-     */
-    atEnd(): boolean;
-
-    /**
-     * Returns the current item in the collection
-     */
-    item(): T;
-
-    /**
-     * Resets the current item in the collection to the first item. If there are no items in the collection,
-     * the current item is set to undefined.
-     */
-    moveFirst(): void;
-
-    /**
-     * Moves the current item to the next item in the collection. If the enumerator is at the end of
-     * the collection or the collection is empty, the current item is set to undefined.
-     */
-    moveNext(): void;
-}
-
-interface EnumeratorConstructor {
-    new <T>(collection: any): Enumerator<T>;
-    new (collection: any): Enumerator<any>;
-}
-
-declare var Enumerator: EnumeratorConstructor;
-
-/**
- * Enables reading from a COM safe array, which might have an alternate lower bound, or multiple dimensions.
- */
-interface VBArray<T> {
-    /**
-     * Returns the number of dimensions (1-based).
-     */
-    dimensions(): number;
-
-    /**
-     * Takes an index for each dimension in the array, and returns the item at the corresponding location.
-     */
-    getItem(dimension1Index: number, ...dimensionNIndexes: number[]): T;
-
-    /**
-     * Returns the smallest available index for a given dimension.
-     * @param dimension 1-based dimension (defaults to 1)
-     */
-    lbound(dimension?: number): number;
-
-    /**
-     * Returns the largest available index for a given dimension.
-     * @param dimension 1-based dimension (defaults to 1)
-     */
-    ubound(dimension?: number): number;
-
-    /**
-     * Returns a Javascript array with all the elements in the VBArray. If there are multiple dimensions,
-     * each successive dimension is appended to the end of the array.
-     * Example: [[1,2,3],[4,5,6]] becomes [1,2,3,4,5,6]
-     */
-    toArray(): T[];
-}
-
-interface VBArrayConstructor {
-    new <T>(safeArray: any): VBArray<T>;
-    new (safeArray: any): VBArray<any>;
-}
-
-declare var VBArray: VBArrayConstructor;
-
-/**
- * Automation date (VT_DATE)
- */
-interface VarDate { }
-
-interface DateConstructor {
-    new (vd: VarDate): Date;
-}
-
-interface Date {
-    getVarDate: () => VarDate;
-}
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved. 
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0  
+ 
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
+MERCHANTABLITY OR NON-INFRINGEMENT. 
+ 
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+
+
+
+/// <reference no-default-lib="true"/>
+
+
+
+
+/////////////////////////////
+/// Windows Script Host APIS
+/////////////////////////////
+
+
+interface ActiveXObject {
+    new (s: string): any;
+}
+declare var ActiveXObject: ActiveXObject;
+
+interface ITextWriter {
+    Write(s: string): void;
+    WriteLine(s: string): void;
+    Close(): void;
+}
+
+interface TextStreamBase {
+    /**
+     * The column number of the current character position in an input stream.
+     */
+    Column: number;
+
+    /**
+     * The current line number in an input stream.
+     */
+    Line: number;
+
+    /**
+     * Closes a text stream.
+     * It is not necessary to close standard streams; they close automatically when the process ends. If
+     * you close a standard stream, be aware that any other pointers to that standard stream become invalid.
+     */
+    Close(): void;
+}
+
+interface TextStreamWriter extends TextStreamBase {
+    /**
+     * Sends a string to an output stream.
+     */
+    Write(s: string): void;
+
+    /**
+     * Sends a specified number of blank lines (newline characters) to an output stream.
+     */
+    WriteBlankLines(intLines: number): void;
+
+    /**
+     * Sends a string followed by a newline character to an output stream.
+     */
+    WriteLine(s: string): void;
+}
+
+interface TextStreamReader extends TextStreamBase {
+    /**
+     * Returns a specified number of characters from an input stream, starting at the current pointer position.
+     * Does not return until the ENTER key is pressed.
+     * Can only be used on a stream in reading mode; causes an error in writing or appending mode.
+     */
+    Read(characters: number): string;
+
+    /**
+     * Returns all characters from an input stream.
+     * Can only be used on a stream in reading mode; causes an error in writing or appending mode.
+     */
+    ReadAll(): string;
+
+    /**
+     * Returns an entire line from an input stream.
+     * Although this method extracts the newline character, it does not add it to the returned string.
+     * Can only be used on a stream in reading mode; causes an error in writing or appending mode.
+     */
+    ReadLine(): string;
+
+    /**
+     * Skips a specified number of characters when reading from an input text stream.
+     * Can only be used on a stream in reading mode; causes an error in writing or appending mode.
+     * @param characters Positive number of characters to skip forward. (Backward skipping is not supported.)
+     */
+    Skip(characters: number): void;
+
+    /**
+     * Skips the next line when reading from an input text stream.
+     * Can only be used on a stream in reading mode, not writing or appending mode.
+     */
+    SkipLine(): void;
+
+    /**
+     * Indicates whether the stream pointer position is at the end of a line.
+     */
+    AtEndOfLine: boolean;
+
+    /**
+     * Indicates whether the stream pointer position is at the end of a stream.
+     */
+    AtEndOfStream: boolean;
+}
+
+declare var WScript: {
+    /**
+     * Outputs text to either a message box (under WScript.exe) or the command console window followed by
+     * a newline (under CScript.exe).
+     */
+    Echo(s: any): void;
+
+    /**
+     * Exposes the write-only error output stream for the current script.
+     * Can be accessed only while using CScript.exe.
+     */
+    StdErr: TextStreamWriter;
+
+    /**
+     * Exposes the write-only output stream for the current script.
+     * Can be accessed only while using CScript.exe.
+     */
+    StdOut: TextStreamWriter;
+    Arguments: { length: number; Item(n: number): string; };
+
+    /**
+     *  The full path of the currently running script.
+     */
+    ScriptFullName: string;
+
+    /**
+     * Forces the script to stop immediately, with an optional exit code.
+     */
+    Quit(exitCode?: number): number;
+
+    /**
+     * The Windows Script Host build version number.
+     */
+    BuildVersion: number;
+
+    /**
+     * Fully qualified path of the host executable.
+     */
+    FullName: string;
+
+    /**
+     * Gets/sets the script mode - interactive(true) or batch(false).
+     */
+    Interactive: boolean;
+
+    /**
+     * The name of the host executable (WScript.exe or CScript.exe).
+     */
+    Name: string;
+
+    /**
+     * Path of the directory containing the host executable.
+     */
+    Path: string;
+
+    /**
+     * The filename of the currently running script.
+     */
+    ScriptName: string;
+
+    /**
+     * Exposes the read-only input stream for the current script.
+     * Can be accessed only while using CScript.exe.
+     */
+    StdIn: TextStreamReader;
+
+    /**
+     * Windows Script Host version
+     */
+    Version: string;
+
+    /**
+     * Connects a COM object's event sources to functions named with a given prefix, in the form prefix_event.
+     */
+    ConnectObject(objEventSource: any, strPrefix: string): void;
+
+    /**
+     * Creates a COM object.
+     * @param strProgiID
+     * @param strPrefix Function names in the form prefix_event will be bound to this object's COM events.
+     */
+    CreateObject(strProgID: string, strPrefix?: string): any;
+
+    /**
+     * Disconnects a COM object from its event sources.
+     */
+    DisconnectObject(obj: any): void;
+
+    /**
+     * Retrieves an existing object with the specified ProgID from memory, or creates a new one from a file.
+     * @param strPathname Fully qualified path to the file containing the object persisted to disk.
+     *                       For objects in memory, pass a zero-length string.
+     * @param strProgID
+     * @param strPrefix Function names in the form prefix_event will be bound to this object's COM events.
+     */
+    GetObject(strPathname: string, strProgID?: string, strPrefix?: string): any;
+
+    /**
+     * Suspends script execution for a specified length of time, then continues execution.
+     * @param intTime Interval (in milliseconds) to suspend script execution.
+     */
+    Sleep(intTime: number): void;
+};
+
+/**
+ * Allows enumerating over a COM collection, which may not have indexed item access.
+ */
+interface Enumerator<T> {
+    /**
+     * Returns true if the current item is the last one in the collection, or the collection is empty,
+     * or the current item is undefined.
+     */
+    atEnd(): boolean;
+
+    /**
+     * Returns the current item in the collection
+     */
+    item(): T;
+
+    /**
+     * Resets the current item in the collection to the first item. If there are no items in the collection,
+     * the current item is set to undefined.
+     */
+    moveFirst(): void;
+
+    /**
+     * Moves the current item to the next item in the collection. If the enumerator is at the end of
+     * the collection or the collection is empty, the current item is set to undefined.
+     */
+    moveNext(): void;
+}
+
+interface EnumeratorConstructor {
+    new <T>(collection: any): Enumerator<T>;
+    new (collection: any): Enumerator<any>;
+}
+
+declare var Enumerator: EnumeratorConstructor;
+
+/**
+ * Enables reading from a COM safe array, which might have an alternate lower bound, or multiple dimensions.
+ */
+interface VBArray<T> {
+    /**
+     * Returns the number of dimensions (1-based).
+     */
+    dimensions(): number;
+
+    /**
+     * Takes an index for each dimension in the array, and returns the item at the corresponding location.
+     */
+    getItem(dimension1Index: number, ...dimensionNIndexes: number[]): T;
+
+    /**
+     * Returns the smallest available index for a given dimension.
+     * @param dimension 1-based dimension (defaults to 1)
+     */
+    lbound(dimension?: number): number;
+
+    /**
+     * Returns the largest available index for a given dimension.
+     * @param dimension 1-based dimension (defaults to 1)
+     */
+    ubound(dimension?: number): number;
+
+    /**
+     * Returns a Javascript array with all the elements in the VBArray. If there are multiple dimensions,
+     * each successive dimension is appended to the end of the array.
+     * Example: [[1,2,3],[4,5,6]] becomes [1,2,3,4,5,6]
+     */
+    toArray(): T[];
+}
+
+interface VBArrayConstructor {
+    new <T>(safeArray: any): VBArray<T>;
+    new (safeArray: any): VBArray<any>;
+}
+
+declare var VBArray: VBArrayConstructor;
+
+/**
+ * Automation date (VT_DATE)
+ */
+interface VarDate { }
+
+interface DateConstructor {
+    new (vd: VarDate): Date;
+}
+
+interface Date {
+    getVarDate: () => VarDate;
+}
diff --git a/bin/lib.webworker.d.ts b/bin/lib.webworker.d.ts
index 6cb14c5..997b007 100644
--- a/bin/lib.webworker.d.ts
+++ b/bin/lib.webworker.d.ts
@@ -1,1220 +1,1872 @@
-/*! *****************************************************************************
-Copyright (c) Microsoft Corporation. All rights reserved. 
-Licensed under the Apache License, Version 2.0 (the "License"); you may not use
-this file except in compliance with the License. You may obtain a copy of the
-License at http://www.apache.org/licenses/LICENSE-2.0  
- 
-THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
-WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
-MERCHANTABLITY OR NON-INFRINGEMENT. 
- 
-See the Apache Version 2.0 License for specific language governing permissions
-and limitations under the License.
-***************************************************************************** */
-
-/// <reference no-default-lib="true"/>
-
-/////////////////////////////
-/// IE Worker APIs
-/////////////////////////////
-
-interface Algorithm {
-    name: string;
-}
-
-interface EventInit {
-    bubbles?: boolean;
-    cancelable?: boolean;
-}
-
-interface IDBIndexParameters {
-    multiEntry?: boolean;
-    unique?: boolean;
-}
-
-interface IDBObjectStoreParameters {
-    autoIncrement?: boolean;
-    keyPath?: IDBKeyPath;
-}
-
-interface KeyAlgorithm {
-    name?: string;
-}
-
-interface EventListener {
-    (evt: Event): void;
-}
-
-interface AudioBuffer {
-    readonly duration: number;
-    readonly length: number;
-    readonly numberOfChannels: number;
-    readonly sampleRate: number;
-    copyFromChannel(destination: Float32Array, channelNumber: number, startInChannel?: number): void;
-    copyToChannel(source: Float32Array, channelNumber: number, startInChannel?: number): void;
-    getChannelData(channel: number): Float32Array;
-}
-
-declare var AudioBuffer: {
-    prototype: AudioBuffer;
-    new(): AudioBuffer;
-}
-
-interface Blob {
-    readonly size: number;
-    readonly type: string;
-    msClose(): void;
-    msDetachStream(): any;
-    slice(start?: number, end?: number, contentType?: string): Blob;
-}
-
-declare var Blob: {
-    prototype: Blob;
-    new (blobParts?: any[], options?: BlobPropertyBag): Blob;
-}
-
-interface CloseEvent extends Event {
-    readonly code: number;
-    readonly reason: string;
-    readonly wasClean: boolean;
-    initCloseEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, wasCleanArg: boolean, codeArg: number, reasonArg: string): void;
-}
-
-declare var CloseEvent: {
-    prototype: CloseEvent;
-    new(): CloseEvent;
-}
-
-interface Console {
-    assert(test?: boolean, message?: string, ...optionalParams: any[]): void;
-    clear(): void;
-    count(countTitle?: string): void;
-    debug(message?: string, ...optionalParams: any[]): void;
-    dir(value?: any, ...optionalParams: any[]): void;
-    dirxml(value: any): void;
-    error(message?: any, ...optionalParams: any[]): void;
-    exception(message?: string, ...optionalParams: any[]): void;
-    group(groupTitle?: string): void;
-    groupCollapsed(groupTitle?: string): void;
-    groupEnd(): void;
-    info(message?: any, ...optionalParams: any[]): void;
-    log(message?: any, ...optionalParams: any[]): void;
-    msIsIndependentlyComposed(element: any): boolean;
-    profile(reportName?: string): void;
-    profileEnd(): void;
-    select(element: any): void;
-    table(...data: any[]): void;
-    time(timerName?: string): void;
-    timeEnd(timerName?: string): void;
-    trace(message?: any, ...optionalParams: any[]): void;
-    warn(message?: any, ...optionalParams: any[]): void;
-}
-
-declare var Console: {
-    prototype: Console;
-    new(): Console;
-}
-
-interface Coordinates {
-    readonly accuracy: number;
-    readonly altitude: number | null;
-    readonly altitudeAccuracy: number | null;
-    readonly heading: number | null;
-    readonly latitude: number;
-    readonly longitude: number;
-    readonly speed: number | null;
-}
-
-declare var Coordinates: {
-    prototype: Coordinates;
-    new(): Coordinates;
-}
-
-interface CryptoKey {
-    readonly algorithm: KeyAlgorithm;
-    readonly extractable: boolean;
-    readonly type: string;
-    readonly usages: string[];
-}
-
-declare var CryptoKey: {
-    prototype: CryptoKey;
-    new(): CryptoKey;
-}
-
-interface DOMError {
-    readonly name: string;
-    toString(): string;
-}
-
-declare var DOMError: {
-    prototype: DOMError;
-    new(): DOMError;
-}
-
-interface DOMException {
-    readonly code: number;
-    readonly message: string;
-    readonly name: string;
-    toString(): string;
-    readonly ABORT_ERR: number;
-    readonly DATA_CLONE_ERR: number;
-    readonly DOMSTRING_SIZE_ERR: number;
-    readonly HIERARCHY_REQUEST_ERR: number;
-    readonly INDEX_SIZE_ERR: number;
-    readonly INUSE_ATTRIBUTE_ERR: number;
-    readonly INVALID_ACCESS_ERR: number;
-    readonly INVALID_CHARACTER_ERR: number;
-    readonly INVALID_MODIFICATION_ERR: number;
-    readonly INVALID_NODE_TYPE_ERR: number;
-    readonly INVALID_STATE_ERR: number;
-    readonly NAMESPACE_ERR: number;
-    readonly NETWORK_ERR: number;
-    readonly NOT_FOUND_ERR: number;
-    readonly NOT_SUPPORTED_ERR: number;
-    readonly NO_DATA_ALLOWED_ERR: number;
-    readonly NO_MODIFICATION_ALLOWED_ERR: number;
-    readonly PARSE_ERR: number;
-    readonly QUOTA_EXCEEDED_ERR: number;
-    readonly SECURITY_ERR: number;
-    readonly SERIALIZE_ERR: number;
-    readonly SYNTAX_ERR: number;
-    readonly TIMEOUT_ERR: number;
-    readonly TYPE_MISMATCH_ERR: number;
-    readonly URL_MISMATCH_ERR: number;
-    readonly VALIDATION_ERR: number;
-    readonly WRONG_DOCUMENT_ERR: number;
-}
-
-declare var DOMException: {
-    prototype: DOMException;
-    new(): DOMException;
-    readonly ABORT_ERR: number;
-    readonly DATA_CLONE_ERR: number;
-    readonly DOMSTRING_SIZE_ERR: number;
-    readonly HIERARCHY_REQUEST_ERR: number;
-    readonly INDEX_SIZE_ERR: number;
-    readonly INUSE_ATTRIBUTE_ERR: number;
-    readonly INVALID_ACCESS_ERR: number;
-    readonly INVALID_CHARACTER_ERR: number;
-    readonly INVALID_MODIFICATION_ERR: number;
-    readonly INVALID_NODE_TYPE_ERR: number;
-    readonly INVALID_STATE_ERR: number;
-    readonly NAMESPACE_ERR: number;
-    readonly NETWORK_ERR: number;
-    readonly NOT_FOUND_ERR: number;
-    readonly NOT_SUPPORTED_ERR: number;
-    readonly NO_DATA_ALLOWED_ERR: number;
-    readonly NO_MODIFICATION_ALLOWED_ERR: number;
-    readonly PARSE_ERR: number;
-    readonly QUOTA_EXCEEDED_ERR: number;
-    readonly SECURITY_ERR: number;
-    readonly SERIALIZE_ERR: number;
-    readonly SYNTAX_ERR: number;
-    readonly TIMEOUT_ERR: number;
-    readonly TYPE_MISMATCH_ERR: number;
-    readonly URL_MISMATCH_ERR: number;
-    readonly VALIDATION_ERR: number;
-    readonly WRONG_DOCUMENT_ERR: number;
-}
-
-interface DOMStringList {
-    readonly length: number;
-    contains(str: string): boolean;
-    item(index: number): string | null;
-    [index: number]: string;
-}
-
-declare var DOMStringList: {
-    prototype: DOMStringList;
-    new(): DOMStringList;
-}
-
-interface ErrorEvent extends Event {
-    readonly colno: number;
-    readonly error: any;
-    readonly filename: string;
-    readonly lineno: number;
-    readonly message: string;
-    initErrorEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, messageArg: string, filenameArg: string, linenoArg: number): void;
-}
-
-declare var ErrorEvent: {
-    prototype: ErrorEvent;
-    new(): ErrorEvent;
-}
-
-interface Event {
-    readonly bubbles: boolean;
-    cancelBubble: boolean;
-    readonly cancelable: boolean;
-    readonly currentTarget: EventTarget;
-    readonly defaultPrevented: boolean;
-    readonly eventPhase: number;
-    readonly isTrusted: boolean;
-    returnValue: boolean;
-    readonly srcElement: any;
-    readonly target: EventTarget;
-    readonly timeStamp: number;
-    readonly type: string;
-    initEvent(eventTypeArg: string, canBubbleArg: boolean, cancelableArg: boolean): void;
-    preventDefault(): void;
-    stopImmediatePropagation(): void;
-    stopPropagation(): void;
-    readonly AT_TARGET: number;
-    readonly BUBBLING_PHASE: number;
-    readonly CAPTURING_PHASE: number;
-}
-
-declare var Event: {
-    prototype: Event;
-    new(type: string, eventInitDict?: EventInit): Event;
-    readonly AT_TARGET: number;
-    readonly BUBBLING_PHASE: number;
-    readonly CAPTURING_PHASE: number;
-}
-
-interface EventTarget {
-    addEventListener(type: string, listener?: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-    dispatchEvent(evt: Event): boolean;
-    removeEventListener(type: string, listener?: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var EventTarget: {
-    prototype: EventTarget;
-    new(): EventTarget;
-}
-
-interface File extends Blob {
-    readonly lastModifiedDate: any;
-    readonly name: string;
-    readonly webkitRelativePath: string;
-}
-
-declare var File: {
-    prototype: File;
-    new (parts: (ArrayBuffer | ArrayBufferView | Blob | string)[], filename: string, properties?: FilePropertyBag): File;
-}
-
-interface FileList {
-    readonly length: number;
-    item(index: number): File;
-    [index: number]: File;
-}
-
-declare var FileList: {
-    prototype: FileList;
-    new(): FileList;
-}
-
-interface FileReader extends EventTarget, MSBaseReader {
-    readonly error: DOMError;
-    readAsArrayBuffer(blob: Blob): void;
-    readAsBinaryString(blob: Blob): void;
-    readAsDataURL(blob: Blob): void;
-    readAsText(blob: Blob, encoding?: string): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var FileReader: {
-    prototype: FileReader;
-    new(): FileReader;
-}
-
-interface IDBCursor {
-    readonly direction: string;
-    key: IDBKeyRange | IDBValidKey;
-    readonly primaryKey: any;
-    source: IDBObjectStore | IDBIndex;
-    advance(count: number): void;
-    continue(key?: IDBKeyRange | IDBValidKey): void;
-    delete(): IDBRequest;
-    update(value: any): IDBRequest;
-    readonly NEXT: string;
-    readonly NEXT_NO_DUPLICATE: string;
-    readonly PREV: string;
-    readonly PREV_NO_DUPLICATE: string;
-}
-
-declare var IDBCursor: {
-    prototype: IDBCursor;
-    new(): IDBCursor;
-    readonly NEXT: string;
-    readonly NEXT_NO_DUPLICATE: string;
-    readonly PREV: string;
-    readonly PREV_NO_DUPLICATE: string;
-}
-
-interface IDBCursorWithValue extends IDBCursor {
-    readonly value: any;
-}
-
-declare var IDBCursorWithValue: {
-    prototype: IDBCursorWithValue;
-    new(): IDBCursorWithValue;
-}
-
-interface IDBDatabase extends EventTarget {
-    readonly name: string;
-    readonly objectStoreNames: DOMStringList;
-    onabort: (this: this, ev: Event) => any;
-    onerror: (this: this, ev: ErrorEvent) => any;
-    version: number;
-    onversionchange: (ev: IDBVersionChangeEvent) => any;
-    close(): void;
-    createObjectStore(name: string, optionalParameters?: IDBObjectStoreParameters): IDBObjectStore;
-    deleteObjectStore(name: string): void;
-    transaction(storeNames: string | string[], mode?: string): IDBTransaction;
-    addEventListener(type: "versionchange", listener: (ev: IDBVersionChangeEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "abort", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var IDBDatabase: {
-    prototype: IDBDatabase;
-    new(): IDBDatabase;
-}
-
-interface IDBFactory {
-    cmp(first: any, second: any): number;
-    deleteDatabase(name: string): IDBOpenDBRequest;
-    open(name: string, version?: number): IDBOpenDBRequest;
-}
-
-declare var IDBFactory: {
-    prototype: IDBFactory;
-    new(): IDBFactory;
-}
-
-interface IDBIndex {
-    keyPath: string | string[];
-    readonly name: string;
-    readonly objectStore: IDBObjectStore;
-    readonly unique: boolean;
-    multiEntry: boolean;
-    count(key?: IDBKeyRange | IDBValidKey): IDBRequest;
-    get(key: IDBKeyRange | IDBValidKey): IDBRequest;
-    getKey(key: IDBKeyRange | IDBValidKey): IDBRequest;
-    openCursor(range?: IDBKeyRange | IDBValidKey, direction?: string): IDBRequest;
-    openKeyCursor(range?: IDBKeyRange | IDBValidKey, direction?: string): IDBRequest;
-}
-
-declare var IDBIndex: {
-    prototype: IDBIndex;
-    new(): IDBIndex;
-}
-
-interface IDBKeyRange {
-    readonly lower: any;
-    readonly lowerOpen: boolean;
-    readonly upper: any;
-    readonly upperOpen: boolean;
-}
-
-declare var IDBKeyRange: {
-    prototype: IDBKeyRange;
-    new(): IDBKeyRange;
-    bound(lower: any, upper: any, lowerOpen?: boolean, upperOpen?: boolean): IDBKeyRange;
-    lowerBound(lower: any, open?: boolean): IDBKeyRange;
-    only(value: any): IDBKeyRange;
-    upperBound(upper: any, open?: boolean): IDBKeyRange;
-}
-
-interface IDBObjectStore {
-    readonly indexNames: DOMStringList;
-    keyPath: string | string[];
-    readonly name: string;
-    readonly transaction: IDBTransaction;
-    autoIncrement: boolean;
-    add(value: any, key?: IDBKeyRange | IDBValidKey): IDBRequest;
-    clear(): IDBRequest;
-    count(key?: IDBKeyRange | IDBValidKey): IDBRequest;
-    createIndex(name: string, keyPath: string | string[], optionalParameters?: IDBIndexParameters): IDBIndex;
-    delete(key: IDBKeyRange | IDBValidKey): IDBRequest;
-    deleteIndex(indexName: string): void;
-    get(key: any): IDBRequest;
-    index(name: string): IDBIndex;
-    openCursor(range?: IDBKeyRange | IDBValidKey, direction?: string): IDBRequest;
-    put(value: any, key?: IDBKeyRange | IDBValidKey): IDBRequest;
-}
-
-declare var IDBObjectStore: {
-    prototype: IDBObjectStore;
-    new(): IDBObjectStore;
-}
-
-interface IDBOpenDBRequest extends IDBRequest {
-    onblocked: (this: this, ev: Event) => any;
-    onupgradeneeded: (this: this, ev: IDBVersionChangeEvent) => any;
-    addEventListener(type: "blocked", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "success", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "upgradeneeded", listener: (this: this, ev: IDBVersionChangeEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var IDBOpenDBRequest: {
-    prototype: IDBOpenDBRequest;
-    new(): IDBOpenDBRequest;
-}
-
-interface IDBRequest extends EventTarget {
-    readonly error: DOMError;
-    onerror: (this: this, ev: ErrorEvent) => any;
-    onsuccess: (this: this, ev: Event) => any;
-    readonly readyState: string;
-    readonly result: any;
-    source: IDBObjectStore | IDBIndex | IDBCursor;
-    readonly transaction: IDBTransaction;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "success", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var IDBRequest: {
-    prototype: IDBRequest;
-    new(): IDBRequest;
-}
-
-interface IDBTransaction extends EventTarget {
-    readonly db: IDBDatabase;
-    readonly error: DOMError;
-    readonly mode: string;
-    onabort: (this: this, ev: Event) => any;
-    oncomplete: (this: this, ev: Event) => any;
-    onerror: (this: this, ev: ErrorEvent) => any;
-    abort(): void;
-    objectStore(name: string): IDBObjectStore;
-    readonly READ_ONLY: string;
-    readonly READ_WRITE: string;
-    readonly VERSION_CHANGE: string;
-    addEventListener(type: "abort", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "complete", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var IDBTransaction: {
-    prototype: IDBTransaction;
-    new(): IDBTransaction;
-    readonly READ_ONLY: string;
-    readonly READ_WRITE: string;
-    readonly VERSION_CHANGE: string;
-}
-
-interface IDBVersionChangeEvent extends Event {
-    readonly newVersion: number | null;
-    readonly oldVersion: number;
-}
-
-declare var IDBVersionChangeEvent: {
-    prototype: IDBVersionChangeEvent;
-    new(): IDBVersionChangeEvent;
-}
-
-interface ImageData {
-    data: Uint8ClampedArray;
-    readonly height: number;
-    readonly width: number;
-}
-
-declare var ImageData: {
-    prototype: ImageData;
-    new(width: number, height: number): ImageData;
-    new(array: Uint8ClampedArray, width: number, height: number): ImageData;
-}
-
-interface MSApp {
-    clearTemporaryWebDataAsync(): MSAppAsyncOperation;
-    createBlobFromRandomAccessStream(type: string, seeker: any): Blob;
-    createDataPackage(object: any): any;
-    createDataPackageFromSelection(): any;
-    createFileFromStorageFile(storageFile: any): File;
-    createStreamFromInputStream(type: string, inputStream: any): MSStream;
-    execAsyncAtPriority(asynchronousCallback: MSExecAtPriorityFunctionCallback, priority: string, ...args: any[]): void;
-    execAtPriority(synchronousCallback: MSExecAtPriorityFunctionCallback, priority: string, ...args: any[]): any;
-    getCurrentPriority(): string;
-    getHtmlPrintDocumentSourceAsync(htmlDoc: any): PromiseLike<any>;
-    getViewId(view: any): any;
-    isTaskScheduledAtPriorityOrHigher(priority: string): boolean;
-    pageHandlesAllApplicationActivations(enabled: boolean): void;
-    suppressSubdownloadCredentialPrompts(suppress: boolean): void;
-    terminateApp(exceptionObject: any): void;
-    readonly CURRENT: string;
-    readonly HIGH: string;
-    readonly IDLE: string;
-    readonly NORMAL: string;
-}
-declare var MSApp: MSApp;
-
-interface MSAppAsyncOperation extends EventTarget {
-    readonly error: DOMError;
-    oncomplete: (this: this, ev: Event) => any;
-    onerror: (this: this, ev: ErrorEvent) => any;
-    readonly readyState: number;
-    readonly result: any;
-    start(): void;
-    readonly COMPLETED: number;
-    readonly ERROR: number;
-    readonly STARTED: number;
-    addEventListener(type: "complete", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var MSAppAsyncOperation: {
-    prototype: MSAppAsyncOperation;
-    new(): MSAppAsyncOperation;
-    readonly COMPLETED: number;
-    readonly ERROR: number;
-    readonly STARTED: number;
-}
-
-interface MSBlobBuilder {
-    append(data: any, endings?: string): void;
-    getBlob(contentType?: string): Blob;
-}
-
-declare var MSBlobBuilder: {
-    prototype: MSBlobBuilder;
-    new(): MSBlobBuilder;
-}
-
-interface MSStream {
-    readonly type: string;
-    msClose(): void;
-    msDetachStream(): any;
-}
-
-declare var MSStream: {
-    prototype: MSStream;
-    new(): MSStream;
-}
-
-interface MSStreamReader extends EventTarget, MSBaseReader {
-    readonly error: DOMError;
-    readAsArrayBuffer(stream: MSStream, size?: number): void;
-    readAsBinaryString(stream: MSStream, size?: number): void;
-    readAsBlob(stream: MSStream, size?: number): void;
-    readAsDataURL(stream: MSStream, size?: number): void;
-    readAsText(stream: MSStream, encoding?: string, size?: number): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var MSStreamReader: {
-    prototype: MSStreamReader;
-    new(): MSStreamReader;
-}
-
-interface MediaQueryList {
-    readonly matches: boolean;
-    readonly media: string;
-    addListener(listener: MediaQueryListListener): void;
-    removeListener(listener: MediaQueryListListener): void;
-}
-
-declare var MediaQueryList: {
-    prototype: MediaQueryList;
-    new(): MediaQueryList;
-}
-
-interface MessageChannel {
-    readonly port1: MessagePort;
-    readonly port2: MessagePort;
-}
-
-declare var MessageChannel: {
-    prototype: MessageChannel;
-    new(): MessageChannel;
-}
-
-interface MessageEvent extends Event {
-    readonly data: any;
-    readonly origin: string;
-    readonly ports: any;
-    readonly source: any;
-    initMessageEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, dataArg: any, originArg: string, lastEventIdArg: string, sourceArg: any): void;
-}
-
-declare var MessageEvent: {
-    prototype: MessageEvent;
-    new(type: string, eventInitDict?: MessageEventInit): MessageEvent;
-}
-
-interface MessagePort extends EventTarget {
-    onmessage: (this: this, ev: MessageEvent) => any;
-    close(): void;
-    postMessage(message?: any, ports?: any): void;
-    start(): void;
-    addEventListener(type: "message", listener: (this: this, ev: MessageEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var MessagePort: {
-    prototype: MessagePort;
-    new(): MessagePort;
-}
-
-interface Position {
-    readonly coords: Coordinates;
-    readonly timestamp: number;
-}
-
-declare var Position: {
-    prototype: Position;
-    new(): Position;
-}
-
-interface PositionError {
-    readonly code: number;
-    readonly message: string;
-    toString(): string;
-    readonly PERMISSION_DENIED: number;
-    readonly POSITION_UNAVAILABLE: number;
-    readonly TIMEOUT: number;
-}
-
-declare var PositionError: {
-    prototype: PositionError;
-    new(): PositionError;
-    readonly PERMISSION_DENIED: number;
-    readonly POSITION_UNAVAILABLE: number;
-    readonly TIMEOUT: number;
-}
-
-interface ProgressEvent extends Event {
-    readonly lengthComputable: boolean;
-    readonly loaded: number;
-    readonly total: number;
-    initProgressEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, lengthComputableArg: boolean, loadedArg: number, totalArg: number): void;
-}
-
-declare var ProgressEvent: {
-    prototype: ProgressEvent;
-    new(type: string, eventInitDict?: ProgressEventInit): ProgressEvent;
-}
-
-interface WebSocket extends EventTarget {
-    binaryType: string;
-    readonly bufferedAmount: number;
-    readonly extensions: string;
-    onclose: (this: this, ev: CloseEvent) => any;
-    onerror: (this: this, ev: ErrorEvent) => any;
-    onmessage: (this: this, ev: MessageEvent) => any;
-    onopen: (this: this, ev: Event) => any;
-    readonly protocol: string;
-    readonly readyState: number;
-    readonly url: string;
-    close(code?: number, reason?: string): void;
-    send(data: any): void;
-    readonly CLOSED: number;
-    readonly CLOSING: number;
-    readonly CONNECTING: number;
-    readonly OPEN: number;
-    addEventListener(type: "close", listener: (this: this, ev: CloseEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "message", listener: (this: this, ev: MessageEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "open", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var WebSocket: {
-    prototype: WebSocket;
-    new(url: string, protocols?: string | string[]): WebSocket;
-    readonly CLOSED: number;
-    readonly CLOSING: number;
-    readonly CONNECTING: number;
-    readonly OPEN: number;
-}
-
-interface Worker extends EventTarget, AbstractWorker {
-    onmessage: (this: this, ev: MessageEvent) => any;
-    postMessage(message: any, ports?: any): void;
-    terminate(): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "message", listener: (this: this, ev: MessageEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var Worker: {
-    prototype: Worker;
-    new(stringUrl: string): Worker;
-}
-
-interface XMLHttpRequest extends EventTarget, XMLHttpRequestEventTarget {
-    onreadystatechange: (this: this, ev: Event) => any;
-    readonly readyState: number;
-    readonly response: any;
-    readonly responseText: string;
-    responseType: string;
-    readonly responseXML: any;
-    readonly status: number;
-    readonly statusText: string;
-    timeout: number;
-    readonly upload: XMLHttpRequestUpload;
-    withCredentials: boolean;
-    msCaching?: string;
-    abort(): void;
-    getAllResponseHeaders(): string;
-    getResponseHeader(header: string): string | null;
-    msCachingEnabled(): boolean;
-    open(method: string, url: string, async?: boolean, user?: string, password?: string): void;
-    overrideMimeType(mime: string): void;
-    send(data?: string): void;
-    send(data?: any): void;
-    setRequestHeader(header: string, value: string): void;
-    readonly DONE: number;
-    readonly HEADERS_RECEIVED: number;
-    readonly LOADING: number;
-    readonly OPENED: number;
-    readonly UNSENT: number;
-    addEventListener(type: "abort", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadend", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadstart", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "progress", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "readystatechange", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "timeout", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var XMLHttpRequest: {
-    prototype: XMLHttpRequest;
-    new(): XMLHttpRequest;
-    readonly DONE: number;
-    readonly HEADERS_RECEIVED: number;
-    readonly LOADING: number;
-    readonly OPENED: number;
-    readonly UNSENT: number;
-    create(): XMLHttpRequest;
-}
-
-interface XMLHttpRequestUpload extends EventTarget, XMLHttpRequestEventTarget {
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var XMLHttpRequestUpload: {
-    prototype: XMLHttpRequestUpload;
-    new(): XMLHttpRequestUpload;
-}
-
-interface AbstractWorker {
-    onerror: (this: this, ev: ErrorEvent) => any;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-interface MSBaseReader {
-    onabort: (this: this, ev: Event) => any;
-    onerror: (this: this, ev: ErrorEvent) => any;
-    onload: (this: this, ev: Event) => any;
-    onloadend: (this: this, ev: ProgressEvent) => any;
-    onloadstart: (this: this, ev: Event) => any;
-    onprogress: (this: this, ev: ProgressEvent) => any;
-    readonly readyState: number;
-    readonly result: any;
-    abort(): void;
-    readonly DONE: number;
-    readonly EMPTY: number;
-    readonly LOADING: number;
-    addEventListener(type: "abort", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadend", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "progress", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-interface NavigatorID {
-    readonly appName: string;
-    readonly appVersion: string;
-    readonly platform: string;
-    readonly product: string;
-    readonly productSub: string;
-    readonly userAgent: string;
-    readonly vendor: string;
-    readonly vendorSub: string;
-}
-
-interface NavigatorOnLine {
-    readonly onLine: boolean;
-}
-
-interface WindowBase64 {
-    atob(encodedString: string): string;
-    btoa(rawString: string): string;
-}
-
-interface WindowConsole {
-    readonly console: Console;
-}
-
-interface XMLHttpRequestEventTarget {
-    onabort: (this: this, ev: Event) => any;
-    onerror: (this: this, ev: ErrorEvent) => any;
-    onload: (this: this, ev: Event) => any;
-    onloadend: (this: this, ev: ProgressEvent) => any;
-    onloadstart: (this: this, ev: Event) => any;
-    onprogress: (this: this, ev: ProgressEvent) => any;
-    ontimeout: (this: this, ev: ProgressEvent) => any;
-    addEventListener(type: "abort", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "load", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadend", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "loadstart", listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
-    addEventListener(type: "progress", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "timeout", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-interface FileReaderSync {
-    readAsArrayBuffer(blob: Blob): any;
-    readAsBinaryString(blob: Blob): void;
-    readAsDataURL(blob: Blob): string;
-    readAsText(blob: Blob, encoding?: string): string;
-}
-
-declare var FileReaderSync: {
-    prototype: FileReaderSync;
-    new(): FileReaderSync;
-}
-
-interface WorkerGlobalScope extends EventTarget, WorkerUtils, DedicatedWorkerGlobalScope, WindowConsole {
-    readonly location: WorkerLocation;
-    onerror: (this: this, ev: ErrorEvent) => any;
-    readonly self: WorkerGlobalScope;
-    close(): void;
-    msWriteProfilerMark(profilerMarkName: string): void;
-    toString(): string;
-    addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: "message", listener: (this: this, ev: MessageEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var WorkerGlobalScope: {
-    prototype: WorkerGlobalScope;
-    new(): WorkerGlobalScope;
-}
-
-interface WorkerLocation {
-    readonly hash: string;
-    readonly host: string;
-    readonly hostname: string;
-    readonly href: string;
-    readonly pathname: string;
-    readonly port: string;
-    readonly protocol: string;
-    readonly search: string;
-    toString(): string;
-}
-
-declare var WorkerLocation: {
-    prototype: WorkerLocation;
-    new(): WorkerLocation;
-}
-
-interface WorkerNavigator extends Object, NavigatorID, NavigatorOnLine {
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-declare var WorkerNavigator: {
-    prototype: WorkerNavigator;
-    new(): WorkerNavigator;
-}
-
-interface DedicatedWorkerGlobalScope {
-    onmessage: (this: this, ev: MessageEvent) => any;
-    postMessage(data: any): void;
-    addEventListener(type: "message", listener: (this: this, ev: MessageEvent) => any, useCapture?: boolean): void;
-    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-}
-
-interface WorkerUtils extends Object, WindowBase64 {
-    readonly indexedDB: IDBFactory;
-    readonly msIndexedDB: IDBFactory;
-    readonly navigator: WorkerNavigator;
-    clearImmediate(handle: number): void;
-    clearInterval(handle: number): void;
-    clearTimeout(handle: number): void;
-    importScripts(...urls: string[]): void;
-    setImmediate(handler: (...args: any[]) => void): number;
-    setImmediate(handler: any, ...args: any[]): number;
-    setInterval(handler: (...args: any[]) => void, timeout: number): number;
-    setInterval(handler: any, timeout?: any, ...args: any[]): number;
-    setTimeout(handler: (...args: any[]) => void, timeout: number): number;
-    setTimeout(handler: any, timeout?: any, ...args: any[]): number;
-}
-
-interface BlobPropertyBag {
-    type?: string;
-    endings?: string;
-}
-
-interface FilePropertyBag {
-    type?: string;
-    lastModified?: number;
-}
-
-interface EventListenerObject {
-    handleEvent(evt: Event): void;
-}
-
-interface MessageEventInit extends EventInit {
-    data?: any;
-    origin?: string;
-    lastEventId?: string;
-    channel?: string;
-    source?: any;
-    ports?: MessagePort[];
-}
-
-interface ProgressEventInit extends EventInit {
-    lengthComputable?: boolean;
-    loaded?: number;
-    total?: number;
-}
-
-interface IDBArrayKey extends Array<IDBValidKey> {
-}
-
-interface RsaKeyGenParams extends Algorithm {
-    modulusLength: number;
-    publicExponent: Uint8Array;
-}
-
-interface RsaHashedKeyGenParams extends RsaKeyGenParams {
-    hash: AlgorithmIdentifier;
-}
-
-interface RsaKeyAlgorithm extends KeyAlgorithm {
-    modulusLength: number;
-    publicExponent: Uint8Array;
-}
-
-interface RsaHashedKeyAlgorithm extends RsaKeyAlgorithm {
-    hash: AlgorithmIdentifier;
-}
-
-interface RsaHashedImportParams {
-    hash: AlgorithmIdentifier;
-}
-
-interface RsaPssParams {
-    saltLength: number;
-}
-
-interface RsaOaepParams extends Algorithm {
-    label?: BufferSource;
-}
-
-interface EcdsaParams extends Algorithm {
-    hash: AlgorithmIdentifier;
-}
-
-interface EcKeyGenParams extends Algorithm {
-    namedCurve: string;
-}
-
-interface EcKeyAlgorithm extends KeyAlgorithm {
-    typedCurve: string;
-}
-
-interface EcKeyImportParams {
-    namedCurve: string;
-}
-
-interface EcdhKeyDeriveParams extends Algorithm {
-    public: CryptoKey;
-}
-
-interface AesCtrParams extends Algorithm {
-    counter: BufferSource;
-    length: number;
-}
-
-interface AesKeyAlgorithm extends KeyAlgorithm {
-    length: number;
-}
-
-interface AesKeyGenParams extends Algorithm {
-    length: number;
-}
-
-interface AesDerivedKeyParams extends Algorithm {
-    length: number;
-}
-
-interface AesCbcParams extends Algorithm {
-    iv: BufferSource;
-}
-
-interface AesCmacParams extends Algorithm {
-    length: number;
-}
-
-interface AesGcmParams extends Algorithm {
-    iv: BufferSource;
-    additionalData?: BufferSource;
-    tagLength?: number;
-}
-
-interface AesCfbParams extends Algorithm {
-    iv: BufferSource;
-}
-
-interface HmacImportParams extends Algorithm {
-    hash?: AlgorithmIdentifier;
-    length?: number;
-}
-
-interface HmacKeyAlgorithm extends KeyAlgorithm {
-    hash: AlgorithmIdentifier;
-    length: number;
-}
-
-interface HmacKeyGenParams extends Algorithm {
-    hash: AlgorithmIdentifier;
-    length?: number;
-}
-
-interface DhKeyGenParams extends Algorithm {
-    prime: Uint8Array;
-    generator: Uint8Array;
-}
-
-interface DhKeyAlgorithm extends KeyAlgorithm {
-    prime: Uint8Array;
-    generator: Uint8Array;
-}
-
-interface DhKeyDeriveParams extends Algorithm {
-    public: CryptoKey;
-}
-
-interface DhImportKeyParams extends Algorithm {
-    prime: Uint8Array;
-    generator: Uint8Array;
-}
-
-interface ConcatParams extends Algorithm {
-    hash?: AlgorithmIdentifier;
-    algorithmId: Uint8Array;
-    partyUInfo: Uint8Array;
-    partyVInfo: Uint8Array;
-    publicInfo?: Uint8Array;
-    privateInfo?: Uint8Array;
-}
-
-interface HkdfCtrParams extends Algorithm {
-    hash: AlgorithmIdentifier;
-    label: BufferSource;
-    context: BufferSource;
-}
-
-interface Pbkdf2Params extends Algorithm {
-    salt: BufferSource;
-    iterations: number;
-    hash: AlgorithmIdentifier;
-}
-
-interface RsaOtherPrimesInfo {
-    r: string;
-    d: string;
-    t: string;
-}
-
-interface JsonWebKey {
-    kty: string;
-    use?: string;
-    key_ops?: string[];
-    alg?: string;
-    kid?: string;
-    x5u?: string;
-    x5c?: string;
-    x5t?: string;
-    ext?: boolean;
-    crv?: string;
-    x?: string;
-    y?: string;
-    d?: string;
-    n?: string;
-    e?: string;
-    p?: string;
-    q?: string;
-    dp?: string;
-    dq?: string;
-    qi?: string;
-    oth?: RsaOtherPrimesInfo[];
-    k?: string;
-}
-
-declare type EventListenerOrEventListenerObject = EventListener | EventListenerObject;
-
-interface ErrorEventHandler {
-    (message: string, filename?: string, lineno?: number, colno?: number, error?:Error): void;
-}
-interface PositionCallback {
-    (position: Position): void;
-}
-interface PositionErrorCallback {
-    (error: PositionError): void;
-}
-interface MediaQueryListListener {
-    (mql: MediaQueryList): void;
-}
-interface MSLaunchUriCallback {
-    (): void;
-}
-interface MSUnsafeFunctionCallback {
-    (): any;
-}
-interface MSExecAtPriorityFunctionCallback {
-    (...args: any[]): any;
-}
-interface DecodeSuccessCallback {
-    (decodedData: AudioBuffer): void;
-}
-interface DecodeErrorCallback {
-    (error: DOMException): void;
-}
-interface FunctionStringCallback {
-    (data: string): void;
-}
-declare var location: WorkerLocation;
-declare var onerror: (this: WorkerGlobalScope, ev: ErrorEvent) => any;
-declare var self: WorkerGlobalScope;
-declare function close(): void;
-declare function msWriteProfilerMark(profilerMarkName: string): void;
-declare function toString(): string;
-declare function addEventListener(type: string, listener?: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-declare function dispatchEvent(evt: Event): boolean;
-declare function removeEventListener(type: string, listener?: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-declare var indexedDB: IDBFactory;
-declare var msIndexedDB: IDBFactory;
-declare var navigator: WorkerNavigator;
-declare function clearImmediate(handle: number): void;
-declare function clearInterval(handle: number): void;
-declare function clearTimeout(handle: number): void;
-declare function importScripts(...urls: string[]): void;
-declare function setImmediate(handler: (...args: any[]) => void): number;
-declare function setImmediate(handler: any, ...args: any[]): number;
-declare function setInterval(handler: (...args: any[]) => void, timeout: number): number;
-declare function setInterval(handler: any, timeout?: any, ...args: any[]): number;
-declare function setTimeout(handler: (...args: any[]) => void, timeout: number): number;
-declare function setTimeout(handler: any, timeout?: any, ...args: any[]): number;
-declare function atob(encodedString: string): string;
-declare function btoa(rawString: string): string;
-declare var onmessage: (this: WorkerGlobalScope, ev: MessageEvent) => any;
-declare function postMessage(data: any): void;
-declare var console: Console;
-declare function addEventListener(type: "error", listener: (this: WorkerGlobalScope, ev: ErrorEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: "message", listener: (this: WorkerGlobalScope, ev: MessageEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
-type AlgorithmIdentifier = string | Algorithm;
-type IDBKeyPath = string;
-type IDBValidKey = number | string | Date | IDBArrayKey;
-type BufferSource = ArrayBuffer | ArrayBufferView;
\ No newline at end of file
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved. 
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0  
+ 
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
+MERCHANTABLITY OR NON-INFRINGEMENT. 
+ 
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+
+
+
+/// <reference no-default-lib="true"/>
+
+
+
+/////////////////////////////
+/// Worker APIs
+/////////////////////////////
+
+interface Algorithm {
+    name: string;
+}
+
+interface CacheQueryOptions {
+    cacheName?: string;
+    ignoreMethod?: boolean;
+    ignoreSearch?: boolean;
+    ignoreVary?: boolean;
+}
+
+interface CloseEventInit extends EventInit {
+    code?: number;
+    reason?: string;
+    wasClean?: boolean;
+}
+
+interface EventInit {
+    scoped?: boolean;
+    bubbles?: boolean;
+    cancelable?: boolean;
+}
+
+interface GetNotificationOptions {
+    tag?: string;
+}
+
+interface IDBIndexParameters {
+    multiEntry?: boolean;
+    unique?: boolean;
+}
+
+interface IDBObjectStoreParameters {
+    autoIncrement?: boolean;
+    keyPath?: IDBKeyPath;
+}
+
+interface KeyAlgorithm {
+    name?: string;
+}
+
+interface MessageEventInit extends EventInit {
+    lastEventId?: string;
+    channel?: string;
+    data?: any;
+    origin?: string;
+    ports?: MessagePort[];
+    source?: any;
+}
+
+interface NotificationOptions {
+    body?: string;
+    dir?: NotificationDirection;
+    icon?: string;
+    lang?: string;
+    tag?: string;
+}
+
+interface ObjectURLOptions {
+    oneTimeOnly?: boolean;
+}
+
+interface PushSubscriptionOptionsInit {
+    applicationServerKey?: any;
+    userVisibleOnly?: boolean;
+}
+
+interface RequestInit {
+    body?: any;
+    cache?: RequestCache;
+    credentials?: RequestCredentials;
+    headers?: any;
+    integrity?: string;
+    keepalive?: boolean;
+    method?: string;
+    mode?: RequestMode;
+    redirect?: RequestRedirect;
+    referrer?: string;
+    referrerPolicy?: ReferrerPolicy;
+    window?: any;
+}
+
+interface ResponseInit {
+    headers?: any;
+    status?: number;
+    statusText?: string;
+}
+
+interface ClientQueryOptions {
+    includeUncontrolled?: boolean;
+    type?: ClientType;
+}
+
+interface ExtendableEventInit extends EventInit {
+}
+
+interface ExtendableMessageEventInit extends ExtendableEventInit {
+    data?: any;
+    origin?: string;
+    lastEventId?: string;
+    source?: Client | ServiceWorker | MessagePort;
+    ports?: MessagePort[];
+}
+
+interface FetchEventInit extends ExtendableEventInit {
+    request?: Request;
+    clientId?: string;
+    isReload?: boolean;
+}
+
+interface NotificationEventInit extends ExtendableEventInit {
+    notification?: Notification;
+    action?: string;
+}
+
+interface PushEventInit extends ExtendableEventInit {
+    data?: any;
+}
+
+interface SyncEventInit extends ExtendableEventInit {
+    tag?: string;
+    lastChance?: boolean;
+}
+
+interface EventListener {
+    (evt: Event): void;
+}
+
+interface WebKitEntriesCallback {
+    (evt: Event): void;
+}
+
+interface WebKitErrorCallback {
+    (evt: Event): void;
+}
+
+interface WebKitFileCallback {
+    (evt: Event): void;
+}
+
+interface AudioBuffer {
+    readonly duration: number;
+    readonly length: number;
+    readonly numberOfChannels: number;
+    readonly sampleRate: number;
+    copyFromChannel(destination: Float32Array, channelNumber: number, startInChannel?: number): void;
+    copyToChannel(source: Float32Array, channelNumber: number, startInChannel?: number): void;
+    getChannelData(channel: number): Float32Array;
+}
+
+declare var AudioBuffer: {
+    prototype: AudioBuffer;
+    new(): AudioBuffer;
+};
+
+interface Blob {
+    readonly size: number;
+    readonly type: string;
+    msClose(): void;
+    msDetachStream(): any;
+    slice(start?: number, end?: number, contentType?: string): Blob;
+}
+
+declare var Blob: {
+    prototype: Blob;
+    new (blobParts?: any[], options?: BlobPropertyBag): Blob;
+};
+
+interface Cache {
+    add(request: RequestInfo): Promise<void>;
+    addAll(requests: RequestInfo[]): Promise<void>;
+    delete(request: RequestInfo, options?: CacheQueryOptions): Promise<boolean>;
+    keys(request?: RequestInfo, options?: CacheQueryOptions): any;
+    match(request: RequestInfo, options?: CacheQueryOptions): Promise<Response>;
+    matchAll(request?: RequestInfo, options?: CacheQueryOptions): any;
+    put(request: RequestInfo, response: Response): Promise<void>;
+}
+
+declare var Cache: {
+    prototype: Cache;
+    new(): Cache;
+};
+
+interface CacheStorage {
+    delete(cacheName: string): Promise<boolean>;
+    has(cacheName: string): Promise<boolean>;
+    keys(): any;
+    match(request: RequestInfo, options?: CacheQueryOptions): Promise<any>;
+    open(cacheName: string): Promise<Cache>;
+}
+
+declare var CacheStorage: {
+    prototype: CacheStorage;
+    new(): CacheStorage;
+};
+
+interface CloseEvent extends Event {
+    readonly code: number;
+    readonly reason: string;
+    readonly wasClean: boolean;
+    initCloseEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, wasCleanArg: boolean, codeArg: number, reasonArg: string): void;
+}
+
+declare var CloseEvent: {
+    prototype: CloseEvent;
+    new(typeArg: string, eventInitDict?: CloseEventInit): CloseEvent;
+};
+
+interface Console {
+    assert(test?: boolean, message?: string, ...optionalParams: any[]): void;
+    clear(): void;
+    count(countTitle?: string): void;
+    debug(message?: any, ...optionalParams: any[]): void;
+    dir(value?: any, ...optionalParams: any[]): void;
+    dirxml(value: any): void;
+    error(message?: any, ...optionalParams: any[]): void;
+    exception(message?: string, ...optionalParams: any[]): void;
+    group(groupTitle?: string, ...optionalParams: any[]): void;
+    groupCollapsed(groupTitle?: string, ...optionalParams: any[]): void;
+    groupEnd(): void;
+    info(message?: any, ...optionalParams: any[]): void;
+    log(message?: any, ...optionalParams: any[]): void;
+    msIsIndependentlyComposed(element: any): boolean;
+    profile(reportName?: string): void;
+    profileEnd(): void;
+    select(element: any): void;
+    table(...data: any[]): void;
+    time(timerName?: string): void;
+    timeEnd(timerName?: string): void;
+    trace(message?: any, ...optionalParams: any[]): void;
+    warn(message?: any, ...optionalParams: any[]): void;
+}
+
+declare var Console: {
+    prototype: Console;
+    new(): Console;
+};
+
+interface Coordinates {
+    readonly accuracy: number;
+    readonly altitude: number | null;
+    readonly altitudeAccuracy: number | null;
+    readonly heading: number | null;
+    readonly latitude: number;
+    readonly longitude: number;
+    readonly speed: number | null;
+}
+
+declare var Coordinates: {
+    prototype: Coordinates;
+    new(): Coordinates;
+};
+
+interface CryptoKey {
+    readonly algorithm: KeyAlgorithm;
+    readonly extractable: boolean;
+    readonly type: string;
+    readonly usages: string[];
+}
+
+declare var CryptoKey: {
+    prototype: CryptoKey;
+    new(): CryptoKey;
+};
+
+interface DOMError {
+    readonly name: string;
+    toString(): string;
+}
+
+declare var DOMError: {
+    prototype: DOMError;
+    new(): DOMError;
+};
+
+interface DOMException {
+    readonly code: number;
+    readonly message: string;
+    readonly name: string;
+    toString(): string;
+    readonly ABORT_ERR: number;
+    readonly DATA_CLONE_ERR: number;
+    readonly DOMSTRING_SIZE_ERR: number;
+    readonly HIERARCHY_REQUEST_ERR: number;
+    readonly INDEX_SIZE_ERR: number;
+    readonly INUSE_ATTRIBUTE_ERR: number;
+    readonly INVALID_ACCESS_ERR: number;
+    readonly INVALID_CHARACTER_ERR: number;
+    readonly INVALID_MODIFICATION_ERR: number;
+    readonly INVALID_NODE_TYPE_ERR: number;
+    readonly INVALID_STATE_ERR: number;
+    readonly NAMESPACE_ERR: number;
+    readonly NETWORK_ERR: number;
+    readonly NO_DATA_ALLOWED_ERR: number;
+    readonly NO_MODIFICATION_ALLOWED_ERR: number;
+    readonly NOT_FOUND_ERR: number;
+    readonly NOT_SUPPORTED_ERR: number;
+    readonly PARSE_ERR: number;
+    readonly QUOTA_EXCEEDED_ERR: number;
+    readonly SECURITY_ERR: number;
+    readonly SERIALIZE_ERR: number;
+    readonly SYNTAX_ERR: number;
+    readonly TIMEOUT_ERR: number;
+    readonly TYPE_MISMATCH_ERR: number;
+    readonly URL_MISMATCH_ERR: number;
+    readonly VALIDATION_ERR: number;
+    readonly WRONG_DOCUMENT_ERR: number;
+}
+
+declare var DOMException: {
+    prototype: DOMException;
+    new(): DOMException;
+    readonly ABORT_ERR: number;
+    readonly DATA_CLONE_ERR: number;
+    readonly DOMSTRING_SIZE_ERR: number;
+    readonly HIERARCHY_REQUEST_ERR: number;
+    readonly INDEX_SIZE_ERR: number;
+    readonly INUSE_ATTRIBUTE_ERR: number;
+    readonly INVALID_ACCESS_ERR: number;
+    readonly INVALID_CHARACTER_ERR: number;
+    readonly INVALID_MODIFICATION_ERR: number;
+    readonly INVALID_NODE_TYPE_ERR: number;
+    readonly INVALID_STATE_ERR: number;
+    readonly NAMESPACE_ERR: number;
+    readonly NETWORK_ERR: number;
+    readonly NO_DATA_ALLOWED_ERR: number;
+    readonly NO_MODIFICATION_ALLOWED_ERR: number;
+    readonly NOT_FOUND_ERR: number;
+    readonly NOT_SUPPORTED_ERR: number;
+    readonly PARSE_ERR: number;
+    readonly QUOTA_EXCEEDED_ERR: number;
+    readonly SECURITY_ERR: number;
+    readonly SERIALIZE_ERR: number;
+    readonly SYNTAX_ERR: number;
+    readonly TIMEOUT_ERR: number;
+    readonly TYPE_MISMATCH_ERR: number;
+    readonly URL_MISMATCH_ERR: number;
+    readonly VALIDATION_ERR: number;
+    readonly WRONG_DOCUMENT_ERR: number;
+};
+
+interface DOMStringList {
+    readonly length: number;
+    contains(str: string): boolean;
+    item(index: number): string | null;
+    [index: number]: string;
+}
+
+declare var DOMStringList: {
+    prototype: DOMStringList;
+    new(): DOMStringList;
+};
+
+interface ErrorEvent extends Event {
+    readonly colno: number;
+    readonly error: any;
+    readonly filename: string;
+    readonly lineno: number;
+    readonly message: string;
+    initErrorEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, messageArg: string, filenameArg: string, linenoArg: number): void;
+}
+
+declare var ErrorEvent: {
+    prototype: ErrorEvent;
+    new(type: string, errorEventInitDict?: ErrorEventInit): ErrorEvent;
+};
+
+interface Event {
+    readonly bubbles: boolean;
+    readonly cancelable: boolean;
+    cancelBubble: boolean;
+    readonly currentTarget: EventTarget;
+    readonly defaultPrevented: boolean;
+    readonly eventPhase: number;
+    readonly isTrusted: boolean;
+    returnValue: boolean;
+    readonly srcElement: any;
+    readonly target: EventTarget;
+    readonly timeStamp: number;
+    readonly type: string;
+    readonly scoped: boolean;
+    initEvent(eventTypeArg: string, canBubbleArg: boolean, cancelableArg: boolean): void;
+    preventDefault(): void;
+    stopImmediatePropagation(): void;
+    stopPropagation(): void;
+    deepPath(): EventTarget[];
+    readonly AT_TARGET: number;
+    readonly BUBBLING_PHASE: number;
+    readonly CAPTURING_PHASE: number;
+}
+
+declare var Event: {
+    prototype: Event;
+    new(typeArg: string, eventInitDict?: EventInit): Event;
+    readonly AT_TARGET: number;
+    readonly BUBBLING_PHASE: number;
+    readonly CAPTURING_PHASE: number;
+};
+
+interface EventTarget {
+    addEventListener(type: string, listener?: EventListenerOrEventListenerObject, options?: boolean | AddEventListenerOptions): void;
+    dispatchEvent(evt: Event): boolean;
+    removeEventListener(type: string, listener?: EventListenerOrEventListenerObject, options?: boolean | EventListenerOptions): void;
+}
+
+declare var EventTarget: {
+    prototype: EventTarget;
+    new(): EventTarget;
+};
+
+interface File extends Blob {
+    readonly lastModifiedDate: any;
+    readonly name: string;
+    readonly webkitRelativePath: string;
+}
+
+declare var File: {
+    prototype: File;
+    new (parts: (ArrayBuffer | ArrayBufferView | Blob | string)[], filename: string, properties?: FilePropertyBag): File;
+};
+
+interface FileList {
+    readonly length: number;
+    item(index: number): File;
+    [index: number]: File;
+}
+
+declare var FileList: {
+    prototype: FileList;
+    new(): FileList;
+};
+
+interface FileReader extends EventTarget, MSBaseReader {
+    readonly error: DOMError;
+    readAsArrayBuffer(blob: Blob): void;
+    readAsBinaryString(blob: Blob): void;
+    readAsDataURL(blob: Blob): void;
+    readAsText(blob: Blob, encoding?: string): void;
+    addEventListener<K extends keyof MSBaseReaderEventMap>(type: K, listener: (this: FileReader, ev: MSBaseReaderEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var FileReader: {
+    prototype: FileReader;
+    new(): FileReader;
+};
+
+interface FormData {
+    append(name: string, value: string | Blob, fileName?: string): void;
+}
+
+declare var FormData: {
+    prototype: FormData;
+    new(): FormData;
+};
+
+interface Headers {
+    append(name: string, value: string): void;
+    delete(name: string): void;
+    forEach(callback: ForEachCallback): void;
+    get(name: string): string | null;
+    has(name: string): boolean;
+    set(name: string, value: string): void;
+}
+
+declare var Headers: {
+    prototype: Headers;
+    new(init?: any): Headers;
+};
+
+interface IDBCursor {
+    readonly direction: IDBCursorDirection;
+    key: IDBKeyRange | IDBValidKey;
+    readonly primaryKey: any;
+    source: IDBObjectStore | IDBIndex;
+    advance(count: number): void;
+    continue(key?: IDBKeyRange | IDBValidKey): void;
+    delete(): IDBRequest;
+    update(value: any): IDBRequest;
+    readonly NEXT: string;
+    readonly NEXT_NO_DUPLICATE: string;
+    readonly PREV: string;
+    readonly PREV_NO_DUPLICATE: string;
+}
+
+declare var IDBCursor: {
+    prototype: IDBCursor;
+    new(): IDBCursor;
+    readonly NEXT: string;
+    readonly NEXT_NO_DUPLICATE: string;
+    readonly PREV: string;
+    readonly PREV_NO_DUPLICATE: string;
+};
+
+interface IDBCursorWithValue extends IDBCursor {
+    readonly value: any;
+}
+
+declare var IDBCursorWithValue: {
+    prototype: IDBCursorWithValue;
+    new(): IDBCursorWithValue;
+};
+
+interface IDBDatabaseEventMap {
+    "abort": Event;
+    "error": Event;
+}
+
+interface IDBDatabase extends EventTarget {
+    readonly name: string;
+    readonly objectStoreNames: DOMStringList;
+    onabort: (this: IDBDatabase, ev: Event) => any;
+    onerror: (this: IDBDatabase, ev: Event) => any;
+    version: number;
+    onversionchange: (ev: IDBVersionChangeEvent) => any;
+    close(): void;
+    createObjectStore(name: string, optionalParameters?: IDBObjectStoreParameters): IDBObjectStore;
+    deleteObjectStore(name: string): void;
+    transaction(storeNames: string | string[], mode?: IDBTransactionMode): IDBTransaction;
+    addEventListener(type: "versionchange", listener: (ev: IDBVersionChangeEvent) => any, useCapture?: boolean): void;
+    addEventListener<K extends keyof IDBDatabaseEventMap>(type: K, listener: (this: IDBDatabase, ev: IDBDatabaseEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var IDBDatabase: {
+    prototype: IDBDatabase;
+    new(): IDBDatabase;
+};
+
+interface IDBFactory {
+    cmp(first: any, second: any): number;
+    deleteDatabase(name: string): IDBOpenDBRequest;
+    open(name: string, version?: number): IDBOpenDBRequest;
+}
+
+declare var IDBFactory: {
+    prototype: IDBFactory;
+    new(): IDBFactory;
+};
+
+interface IDBIndex {
+    keyPath: string | string[];
+    readonly name: string;
+    readonly objectStore: IDBObjectStore;
+    readonly unique: boolean;
+    multiEntry: boolean;
+    count(key?: IDBKeyRange | IDBValidKey): IDBRequest;
+    get(key: IDBKeyRange | IDBValidKey): IDBRequest;
+    getKey(key: IDBKeyRange | IDBValidKey): IDBRequest;
+    openCursor(range?: IDBKeyRange | IDBValidKey, direction?: IDBCursorDirection): IDBRequest;
+    openKeyCursor(range?: IDBKeyRange | IDBValidKey, direction?: IDBCursorDirection): IDBRequest;
+}
+
+declare var IDBIndex: {
+    prototype: IDBIndex;
+    new(): IDBIndex;
+};
+
+interface IDBKeyRange {
+    readonly lower: any;
+    readonly lowerOpen: boolean;
+    readonly upper: any;
+    readonly upperOpen: boolean;
+}
+
+declare var IDBKeyRange: {
+    prototype: IDBKeyRange;
+    new(): IDBKeyRange;
+    bound(lower: any, upper: any, lowerOpen?: boolean, upperOpen?: boolean): IDBKeyRange;
+    lowerBound(lower: any, open?: boolean): IDBKeyRange;
+    only(value: any): IDBKeyRange;
+    upperBound(upper: any, open?: boolean): IDBKeyRange;
+};
+
+interface IDBObjectStore {
+    readonly indexNames: DOMStringList;
+    keyPath: string | string[];
+    readonly name: string;
+    readonly transaction: IDBTransaction;
+    autoIncrement: boolean;
+    add(value: any, key?: IDBKeyRange | IDBValidKey): IDBRequest;
+    clear(): IDBRequest;
+    count(key?: IDBKeyRange | IDBValidKey): IDBRequest;
+    createIndex(name: string, keyPath: string | string[], optionalParameters?: IDBIndexParameters): IDBIndex;
+    delete(key: IDBKeyRange | IDBValidKey): IDBRequest;
+    deleteIndex(indexName: string): void;
+    get(key: any): IDBRequest;
+    index(name: string): IDBIndex;
+    openCursor(range?: IDBKeyRange | IDBValidKey, direction?: IDBCursorDirection): IDBRequest;
+    put(value: any, key?: IDBKeyRange | IDBValidKey): IDBRequest;
+}
+
+declare var IDBObjectStore: {
+    prototype: IDBObjectStore;
+    new(): IDBObjectStore;
+};
+
+interface IDBOpenDBRequestEventMap extends IDBRequestEventMap {
+    "blocked": Event;
+    "upgradeneeded": IDBVersionChangeEvent;
+}
+
+interface IDBOpenDBRequest extends IDBRequest {
+    onblocked: (this: IDBOpenDBRequest, ev: Event) => any;
+    onupgradeneeded: (this: IDBOpenDBRequest, ev: IDBVersionChangeEvent) => any;
+    addEventListener<K extends keyof IDBOpenDBRequestEventMap>(type: K, listener: (this: IDBOpenDBRequest, ev: IDBOpenDBRequestEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var IDBOpenDBRequest: {
+    prototype: IDBOpenDBRequest;
+    new(): IDBOpenDBRequest;
+};
+
+interface IDBRequestEventMap {
+    "error": Event;
+    "success": Event;
+}
+
+interface IDBRequest extends EventTarget {
+    readonly error: DOMException;
+    onerror: (this: IDBRequest, ev: Event) => any;
+    onsuccess: (this: IDBRequest, ev: Event) => any;
+    readonly readyState: IDBRequestReadyState;
+    readonly result: any;
+    source: IDBObjectStore | IDBIndex | IDBCursor;
+    readonly transaction: IDBTransaction;
+    addEventListener<K extends keyof IDBRequestEventMap>(type: K, listener: (this: IDBRequest, ev: IDBRequestEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var IDBRequest: {
+    prototype: IDBRequest;
+    new(): IDBRequest;
+};
+
+interface IDBTransactionEventMap {
+    "abort": Event;
+    "complete": Event;
+    "error": Event;
+}
+
+interface IDBTransaction extends EventTarget {
+    readonly db: IDBDatabase;
+    readonly error: DOMException;
+    readonly mode: IDBTransactionMode;
+    onabort: (this: IDBTransaction, ev: Event) => any;
+    oncomplete: (this: IDBTransaction, ev: Event) => any;
+    onerror: (this: IDBTransaction, ev: Event) => any;
+    abort(): void;
+    objectStore(name: string): IDBObjectStore;
+    readonly READ_ONLY: string;
+    readonly READ_WRITE: string;
+    readonly VERSION_CHANGE: string;
+    addEventListener<K extends keyof IDBTransactionEventMap>(type: K, listener: (this: IDBTransaction, ev: IDBTransactionEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var IDBTransaction: {
+    prototype: IDBTransaction;
+    new(): IDBTransaction;
+    readonly READ_ONLY: string;
+    readonly READ_WRITE: string;
+    readonly VERSION_CHANGE: string;
+};
+
+interface IDBVersionChangeEvent extends Event {
+    readonly newVersion: number | null;
+    readonly oldVersion: number;
+}
+
+declare var IDBVersionChangeEvent: {
+    prototype: IDBVersionChangeEvent;
+    new(): IDBVersionChangeEvent;
+};
+
+interface ImageData {
+    data: Uint8ClampedArray;
+    readonly height: number;
+    readonly width: number;
+}
+
+declare var ImageData: {
+    prototype: ImageData;
+    new(width: number, height: number): ImageData;
+    new(array: Uint8ClampedArray, width: number, height: number): ImageData;
+};
+
+interface MessageChannel {
+    readonly port1: MessagePort;
+    readonly port2: MessagePort;
+}
+
+declare var MessageChannel: {
+    prototype: MessageChannel;
+    new(): MessageChannel;
+};
+
+interface MessageEvent extends Event {
+    readonly data: any;
+    readonly origin: string;
+    readonly ports: any;
+    readonly source: any;
+    initMessageEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, dataArg: any, originArg: string, lastEventIdArg: string, sourceArg: any): void;
+}
+
+declare var MessageEvent: {
+    prototype: MessageEvent;
+    new(type: string, eventInitDict?: MessageEventInit): MessageEvent;
+};
+
+interface MessagePortEventMap {
+    "message": MessageEvent;
+}
+
+interface MessagePort extends EventTarget {
+    onmessage: (this: MessagePort, ev: MessageEvent) => any;
+    close(): void;
+    postMessage(message?: any, transfer?: any[]): void;
+    start(): void;
+    addEventListener<K extends keyof MessagePortEventMap>(type: K, listener: (this: MessagePort, ev: MessagePortEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var MessagePort: {
+    prototype: MessagePort;
+    new(): MessagePort;
+};
+
+interface NotificationEventMap {
+    "click": Event;
+    "close": Event;
+    "error": Event;
+    "show": Event;
+}
+
+interface Notification extends EventTarget {
+    readonly body: string;
+    readonly dir: NotificationDirection;
+    readonly icon: string;
+    readonly lang: string;
+    onclick: (this: Notification, ev: Event) => any;
+    onclose: (this: Notification, ev: Event) => any;
+    onerror: (this: Notification, ev: Event) => any;
+    onshow: (this: Notification, ev: Event) => any;
+    readonly permission: NotificationPermission;
+    readonly tag: string;
+    readonly title: string;
+    close(): void;
+    addEventListener<K extends keyof NotificationEventMap>(type: K, listener: (this: Notification, ev: NotificationEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var Notification: {
+    prototype: Notification;
+    new(title: string, options?: NotificationOptions): Notification;
+    requestPermission(callback?: NotificationPermissionCallback): Promise<NotificationPermission>;
+};
+
+interface Performance {
+    readonly navigation: PerformanceNavigation;
+    readonly timing: PerformanceTiming;
+    clearMarks(markName?: string): void;
+    clearMeasures(measureName?: string): void;
+    clearResourceTimings(): void;
+    getEntries(): any;
+    getEntriesByName(name: string, entryType?: string): any;
+    getEntriesByType(entryType: string): any;
+    getMarks(markName?: string): any;
+    getMeasures(measureName?: string): any;
+    mark(markName: string): void;
+    measure(measureName: string, startMarkName?: string, endMarkName?: string): void;
+    now(): number;
+    setResourceTimingBufferSize(maxSize: number): void;
+    toJSON(): any;
+}
+
+declare var Performance: {
+    prototype: Performance;
+    new(): Performance;
+};
+
+interface PerformanceNavigation {
+    readonly redirectCount: number;
+    readonly type: number;
+    toJSON(): any;
+    readonly TYPE_BACK_FORWARD: number;
+    readonly TYPE_NAVIGATE: number;
+    readonly TYPE_RELOAD: number;
+    readonly TYPE_RESERVED: number;
+}
+
+declare var PerformanceNavigation: {
+    prototype: PerformanceNavigation;
+    new(): PerformanceNavigation;
+    readonly TYPE_BACK_FORWARD: number;
+    readonly TYPE_NAVIGATE: number;
+    readonly TYPE_RELOAD: number;
+    readonly TYPE_RESERVED: number;
+};
+
+interface PerformanceTiming {
+    readonly connectEnd: number;
+    readonly connectStart: number;
+    readonly domainLookupEnd: number;
+    readonly domainLookupStart: number;
+    readonly domComplete: number;
+    readonly domContentLoadedEventEnd: number;
+    readonly domContentLoadedEventStart: number;
+    readonly domInteractive: number;
+    readonly domLoading: number;
+    readonly fetchStart: number;
+    readonly loadEventEnd: number;
+    readonly loadEventStart: number;
+    readonly msFirstPaint: number;
+    readonly navigationStart: number;
+    readonly redirectEnd: number;
+    readonly redirectStart: number;
+    readonly requestStart: number;
+    readonly responseEnd: number;
+    readonly responseStart: number;
+    readonly unloadEventEnd: number;
+    readonly unloadEventStart: number;
+    readonly secureConnectionStart: number;
+    toJSON(): any;
+}
+
+declare var PerformanceTiming: {
+    prototype: PerformanceTiming;
+    new(): PerformanceTiming;
+};
+
+interface Position {
+    readonly coords: Coordinates;
+    readonly timestamp: number;
+}
+
+declare var Position: {
+    prototype: Position;
+    new(): Position;
+};
+
+interface PositionError {
+    readonly code: number;
+    readonly message: string;
+    toString(): string;
+    readonly PERMISSION_DENIED: number;
+    readonly POSITION_UNAVAILABLE: number;
+    readonly TIMEOUT: number;
+}
+
+declare var PositionError: {
+    prototype: PositionError;
+    new(): PositionError;
+    readonly PERMISSION_DENIED: number;
+    readonly POSITION_UNAVAILABLE: number;
+    readonly TIMEOUT: number;
+};
+
+interface ProgressEvent extends Event {
+    readonly lengthComputable: boolean;
+    readonly loaded: number;
+    readonly total: number;
+    initProgressEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, lengthComputableArg: boolean, loadedArg: number, totalArg: number): void;
+}
+
+declare var ProgressEvent: {
+    prototype: ProgressEvent;
+    new(type: string, eventInitDict?: ProgressEventInit): ProgressEvent;
+};
+
+interface PushManager {
+    getSubscription(): Promise<PushSubscription>;
+    permissionState(options?: PushSubscriptionOptionsInit): Promise<PushPermissionState>;
+    subscribe(options?: PushSubscriptionOptionsInit): Promise<PushSubscription>;
+}
+
+declare var PushManager: {
+    prototype: PushManager;
+    new(): PushManager;
+};
+
+interface PushSubscription {
+    readonly endpoint: USVString;
+    readonly options: PushSubscriptionOptions;
+    getKey(name: PushEncryptionKeyName): ArrayBuffer | null;
+    toJSON(): any;
+    unsubscribe(): Promise<boolean>;
+}
+
+declare var PushSubscription: {
+    prototype: PushSubscription;
+    new(): PushSubscription;
+};
+
+interface PushSubscriptionOptions {
+    readonly applicationServerKey: ArrayBuffer | null;
+    readonly userVisibleOnly: boolean;
+}
+
+declare var PushSubscriptionOptions: {
+    prototype: PushSubscriptionOptions;
+    new(): PushSubscriptionOptions;
+};
+
+interface ReadableStream {
+    readonly locked: boolean;
+    cancel(): Promise<void>;
+    getReader(): ReadableStreamReader;
+}
+
+declare var ReadableStream: {
+    prototype: ReadableStream;
+    new(): ReadableStream;
+};
+
+interface ReadableStreamReader {
+    cancel(): Promise<void>;
+    read(): Promise<any>;
+    releaseLock(): void;
+}
+
+declare var ReadableStreamReader: {
+    prototype: ReadableStreamReader;
+    new(): ReadableStreamReader;
+};
+
+interface Request extends Object, Body {
+    readonly cache: RequestCache;
+    readonly credentials: RequestCredentials;
+    readonly destination: RequestDestination;
+    readonly headers: Headers;
+    readonly integrity: string;
+    readonly keepalive: boolean;
+    readonly method: string;
+    readonly mode: RequestMode;
+    readonly redirect: RequestRedirect;
+    readonly referrer: string;
+    readonly referrerPolicy: ReferrerPolicy;
+    readonly type: RequestType;
+    readonly url: string;
+    clone(): Request;
+}
+
+declare var Request: {
+    prototype: Request;
+    new(input: Request | string, init?: RequestInit): Request;
+};
+
+interface Response extends Object, Body {
+    readonly body: ReadableStream | null;
+    readonly headers: Headers;
+    readonly ok: boolean;
+    readonly status: number;
+    readonly statusText: string;
+    readonly type: ResponseType;
+    readonly url: string;
+    clone(): Response;
+}
+
+declare var Response: {
+    prototype: Response;
+    new(body?: any, init?: ResponseInit): Response;
+    error: () => Response;
+    redirect: (url: string, status?: number) => Response;
+};
+
+interface ServiceWorkerEventMap extends AbstractWorkerEventMap {
+    "statechange": Event;
+}
+
+interface ServiceWorker extends EventTarget, AbstractWorker {
+    onstatechange: (this: ServiceWorker, ev: Event) => any;
+    readonly scriptURL: USVString;
+    readonly state: ServiceWorkerState;
+    postMessage(message: any, transfer?: any[]): void;
+    addEventListener<K extends keyof ServiceWorkerEventMap>(type: K, listener: (this: ServiceWorker, ev: ServiceWorkerEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var ServiceWorker: {
+    prototype: ServiceWorker;
+    new(): ServiceWorker;
+};
+
+interface ServiceWorkerRegistrationEventMap {
+    "updatefound": Event;
+}
+
+interface ServiceWorkerRegistration extends EventTarget {
+    readonly active: ServiceWorker | null;
+    readonly installing: ServiceWorker | null;
+    onupdatefound: (this: ServiceWorkerRegistration, ev: Event) => any;
+    readonly pushManager: PushManager;
+    readonly scope: USVString;
+    readonly sync: SyncManager;
+    readonly waiting: ServiceWorker | null;
+    getNotifications(filter?: GetNotificationOptions): any;
+    showNotification(title: string, options?: NotificationOptions): Promise<void>;
+    unregister(): Promise<boolean>;
+    update(): Promise<void>;
+    addEventListener<K extends keyof ServiceWorkerRegistrationEventMap>(type: K, listener: (this: ServiceWorkerRegistration, ev: ServiceWorkerRegistrationEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var ServiceWorkerRegistration: {
+    prototype: ServiceWorkerRegistration;
+    new(): ServiceWorkerRegistration;
+};
+
+interface SyncManager {
+    getTags(): any;
+    register(tag: string): Promise<void>;
+}
+
+declare var SyncManager: {
+    prototype: SyncManager;
+    new(): SyncManager;
+};
+
+interface URL {
+    hash: string;
+    host: string;
+    hostname: string;
+    href: string;
+    readonly origin: string;
+    password: string;
+    pathname: string;
+    port: string;
+    protocol: string;
+    search: string;
+    username: string;
+    readonly searchParams: URLSearchParams;
+    toString(): string;
+}
+
+declare var URL: {
+    prototype: URL;
+    new(url: string, base?: string): URL;
+    createObjectURL(object: any, options?: ObjectURLOptions): string;
+    revokeObjectURL(url: string): void;
+};
+
+interface WebSocketEventMap {
+    "close": CloseEvent;
+    "error": Event;
+    "message": MessageEvent;
+    "open": Event;
+}
+
+interface WebSocket extends EventTarget {
+    binaryType: string;
+    readonly bufferedAmount: number;
+    readonly extensions: string;
+    onclose: (this: WebSocket, ev: CloseEvent) => any;
+    onerror: (this: WebSocket, ev: Event) => any;
+    onmessage: (this: WebSocket, ev: MessageEvent) => any;
+    onopen: (this: WebSocket, ev: Event) => any;
+    readonly protocol: string;
+    readonly readyState: number;
+    readonly url: string;
+    close(code?: number, reason?: string): void;
+    send(data: any): void;
+    readonly CLOSED: number;
+    readonly CLOSING: number;
+    readonly CONNECTING: number;
+    readonly OPEN: number;
+    addEventListener<K extends keyof WebSocketEventMap>(type: K, listener: (this: WebSocket, ev: WebSocketEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var WebSocket: {
+    prototype: WebSocket;
+    new(url: string, protocols?: string | string[]): WebSocket;
+    readonly CLOSED: number;
+    readonly CLOSING: number;
+    readonly CONNECTING: number;
+    readonly OPEN: number;
+};
+
+interface WorkerEventMap extends AbstractWorkerEventMap {
+    "message": MessageEvent;
+}
+
+interface Worker extends EventTarget, AbstractWorker {
+    onmessage: (this: Worker, ev: MessageEvent) => any;
+    postMessage(message: any, transfer?: any[]): void;
+    terminate(): void;
+    addEventListener<K extends keyof WorkerEventMap>(type: K, listener: (this: Worker, ev: WorkerEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var Worker: {
+    prototype: Worker;
+    new(stringUrl: string): Worker;
+};
+
+interface XMLHttpRequestEventMap extends XMLHttpRequestEventTargetEventMap {
+    "readystatechange": Event;
+}
+
+interface XMLHttpRequest extends EventTarget, XMLHttpRequestEventTarget {
+    onreadystatechange: (this: XMLHttpRequest, ev: Event) => any;
+    readonly readyState: number;
+    readonly response: any;
+    readonly responseText: string;
+    responseType: XMLHttpRequestResponseType;
+    readonly responseURL: string;
+    readonly responseXML: any;
+    readonly status: number;
+    readonly statusText: string;
+    timeout: number;
+    readonly upload: XMLHttpRequestUpload;
+    withCredentials: boolean;
+    msCaching?: string;
+    abort(): void;
+    getAllResponseHeaders(): string;
+    getResponseHeader(header: string): string | null;
+    msCachingEnabled(): boolean;
+    open(method: string, url: string, async?: boolean, user?: string, password?: string): void;
+    overrideMimeType(mime: string): void;
+    send(data?: string): void;
+    send(data?: any): void;
+    setRequestHeader(header: string, value: string): void;
+    readonly DONE: number;
+    readonly HEADERS_RECEIVED: number;
+    readonly LOADING: number;
+    readonly OPENED: number;
+    readonly UNSENT: number;
+    addEventListener<K extends keyof XMLHttpRequestEventMap>(type: K, listener: (this: XMLHttpRequest, ev: XMLHttpRequestEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var XMLHttpRequest: {
+    prototype: XMLHttpRequest;
+    new(): XMLHttpRequest;
+    readonly DONE: number;
+    readonly HEADERS_RECEIVED: number;
+    readonly LOADING: number;
+    readonly OPENED: number;
+    readonly UNSENT: number;
+};
+
+interface XMLHttpRequestUpload extends EventTarget, XMLHttpRequestEventTarget {
+    addEventListener<K extends keyof XMLHttpRequestEventTargetEventMap>(type: K, listener: (this: XMLHttpRequestUpload, ev: XMLHttpRequestEventTargetEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var XMLHttpRequestUpload: {
+    prototype: XMLHttpRequestUpload;
+    new(): XMLHttpRequestUpload;
+};
+
+interface AbstractWorkerEventMap {
+    "error": ErrorEvent;
+}
+
+interface AbstractWorker {
+    onerror: (this: AbstractWorker, ev: ErrorEvent) => any;
+    addEventListener<K extends keyof AbstractWorkerEventMap>(type: K, listener: (this: AbstractWorker, ev: AbstractWorkerEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+interface Body {
+    readonly bodyUsed: boolean;
+    arrayBuffer(): Promise<ArrayBuffer>;
+    blob(): Promise<Blob>;
+    json(): Promise<any>;
+    text(): Promise<string>;
+}
+
+interface GlobalFetch {
+    fetch(input: RequestInfo, init?: RequestInit): Promise<Response>;
+}
+
+interface MSBaseReaderEventMap {
+    "abort": Event;
+    "error": ErrorEvent;
+    "load": Event;
+    "loadend": ProgressEvent;
+    "loadstart": Event;
+    "progress": ProgressEvent;
+}
+
+interface MSBaseReader {
+    onabort: (this: MSBaseReader, ev: Event) => any;
+    onerror: (this: MSBaseReader, ev: ErrorEvent) => any;
+    onload: (this: MSBaseReader, ev: Event) => any;
+    onloadend: (this: MSBaseReader, ev: ProgressEvent) => any;
+    onloadstart: (this: MSBaseReader, ev: Event) => any;
+    onprogress: (this: MSBaseReader, ev: ProgressEvent) => any;
+    readonly readyState: number;
+    readonly result: any;
+    abort(): void;
+    readonly DONE: number;
+    readonly EMPTY: number;
+    readonly LOADING: number;
+    addEventListener<K extends keyof MSBaseReaderEventMap>(type: K, listener: (this: MSBaseReader, ev: MSBaseReaderEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+interface NavigatorBeacon {
+    sendBeacon(url: USVString, data?: BodyInit): boolean;
+}
+
+interface NavigatorConcurrentHardware {
+    readonly hardwareConcurrency: number;
+}
+
+interface NavigatorID {
+    readonly appCodeName: string;
+    readonly appName: string;
+    readonly appVersion: string;
+    readonly platform: string;
+    readonly product: string;
+    readonly productSub: string;
+    readonly userAgent: string;
+    readonly vendor: string;
+    readonly vendorSub: string;
+}
+
+interface NavigatorOnLine {
+    readonly onLine: boolean;
+}
+
+interface WindowBase64 {
+    atob(encodedString: string): string;
+    btoa(rawString: string): string;
+}
+
+interface WindowConsole {
+    readonly console: Console;
+}
+
+interface XMLHttpRequestEventTargetEventMap {
+    "abort": Event;
+    "error": ErrorEvent;
+    "load": Event;
+    "loadend": ProgressEvent;
+    "loadstart": Event;
+    "progress": ProgressEvent;
+    "timeout": ProgressEvent;
+}
+
+interface XMLHttpRequestEventTarget {
+    onabort: (this: XMLHttpRequestEventTarget, ev: Event) => any;
+    onerror: (this: XMLHttpRequestEventTarget, ev: ErrorEvent) => any;
+    onload: (this: XMLHttpRequestEventTarget, ev: Event) => any;
+    onloadend: (this: XMLHttpRequestEventTarget, ev: ProgressEvent) => any;
+    onloadstart: (this: XMLHttpRequestEventTarget, ev: Event) => any;
+    onprogress: (this: XMLHttpRequestEventTarget, ev: ProgressEvent) => any;
+    ontimeout: (this: XMLHttpRequestEventTarget, ev: ProgressEvent) => any;
+    addEventListener<K extends keyof XMLHttpRequestEventTargetEventMap>(type: K, listener: (this: XMLHttpRequestEventTarget, ev: XMLHttpRequestEventTargetEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+interface Client {
+    readonly frameType: FrameType;
+    readonly id: string;
+    readonly url: USVString;
+    postMessage(message: any, transfer?: any[]): void;
+}
+
+declare var Client: {
+    prototype: Client;
+    new(): Client;
+};
+
+interface Clients {
+    claim(): Promise<void>;
+    get(id: string): Promise<any>;
+    matchAll(options?: ClientQueryOptions): any;
+    openWindow(url: USVString): Promise<WindowClient>;
+}
+
+declare var Clients: {
+    prototype: Clients;
+    new(): Clients;
+};
+
+interface DedicatedWorkerGlobalScopeEventMap extends WorkerGlobalScopeEventMap {
+    "message": MessageEvent;
+}
+
+interface DedicatedWorkerGlobalScope extends WorkerGlobalScope {
+    onmessage: (this: DedicatedWorkerGlobalScope, ev: MessageEvent) => any;
+    close(): void;
+    postMessage(message: any, transfer?: any[]): void;
+    addEventListener<K extends keyof DedicatedWorkerGlobalScopeEventMap>(type: K, listener: (this: DedicatedWorkerGlobalScope, ev: DedicatedWorkerGlobalScopeEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var DedicatedWorkerGlobalScope: {
+    prototype: DedicatedWorkerGlobalScope;
+    new(): DedicatedWorkerGlobalScope;
+};
+
+interface ExtendableEvent extends Event {
+    waitUntil(f: Promise<any>): void;
+}
+
+declare var ExtendableEvent: {
+    prototype: ExtendableEvent;
+    new(type: string, eventInitDict?: ExtendableEventInit): ExtendableEvent;
+};
+
+interface ExtendableMessageEvent extends ExtendableEvent {
+    readonly data: any;
+    readonly lastEventId: string;
+    readonly origin: string;
+    readonly ports: MessagePort[] | null;
+    readonly source: Client | ServiceWorker | MessagePort | null;
+}
+
+declare var ExtendableMessageEvent: {
+    prototype: ExtendableMessageEvent;
+    new(type: string, eventInitDict?: ExtendableMessageEventInit): ExtendableMessageEvent;
+};
+
+interface FetchEvent extends ExtendableEvent {
+    readonly clientId: string | null;
+    readonly isReload: boolean;
+    readonly request: Request;
+    respondWith(r: Promise<Response>): void;
+}
+
+declare var FetchEvent: {
+    prototype: FetchEvent;
+    new(type: string, eventInitDict: FetchEventInit): FetchEvent;
+};
+
+interface FileReaderSync {
+    readAsArrayBuffer(blob: Blob): any;
+    readAsBinaryString(blob: Blob): void;
+    readAsDataURL(blob: Blob): string;
+    readAsText(blob: Blob, encoding?: string): string;
+}
+
+declare var FileReaderSync: {
+    prototype: FileReaderSync;
+    new(): FileReaderSync;
+};
+
+interface NotificationEvent extends ExtendableEvent {
+    readonly action: string;
+    readonly notification: Notification;
+}
+
+declare var NotificationEvent: {
+    prototype: NotificationEvent;
+    new(type: string, eventInitDict: NotificationEventInit): NotificationEvent;
+};
+
+interface PushEvent extends ExtendableEvent {
+    readonly data: PushMessageData | null;
+}
+
+declare var PushEvent: {
+    prototype: PushEvent;
+    new(type: string, eventInitDict?: PushEventInit): PushEvent;
+};
+
+interface PushMessageData {
+    arrayBuffer(): ArrayBuffer;
+    blob(): Blob;
+    json(): JSON;
+    text(): USVString;
+}
+
+declare var PushMessageData: {
+    prototype: PushMessageData;
+    new(): PushMessageData;
+};
+
+interface ServiceWorkerGlobalScopeEventMap extends WorkerGlobalScopeEventMap {
+    "activate": ExtendableEvent;
+    "fetch": FetchEvent;
+    "install": ExtendableEvent;
+    "message": ExtendableMessageEvent;
+    "notificationclick": NotificationEvent;
+    "notificationclose": NotificationEvent;
+    "push": PushEvent;
+    "pushsubscriptionchange": ExtendableEvent;
+    "sync": SyncEvent;
+}
+
+interface ServiceWorkerGlobalScope extends WorkerGlobalScope {
+    readonly clients: Clients;
+    onactivate: (this: ServiceWorkerGlobalScope, ev: ExtendableEvent) => any;
+    onfetch: (this: ServiceWorkerGlobalScope, ev: FetchEvent) => any;
+    oninstall: (this: ServiceWorkerGlobalScope, ev: ExtendableEvent) => any;
+    onmessage: (this: ServiceWorkerGlobalScope, ev: ExtendableMessageEvent) => any;
+    onnotificationclick: (this: ServiceWorkerGlobalScope, ev: NotificationEvent) => any;
+    onnotificationclose: (this: ServiceWorkerGlobalScope, ev: NotificationEvent) => any;
+    onpush: (this: ServiceWorkerGlobalScope, ev: PushEvent) => any;
+    onpushsubscriptionchange: (this: ServiceWorkerGlobalScope, ev: ExtendableEvent) => any;
+    onsync: (this: ServiceWorkerGlobalScope, ev: SyncEvent) => any;
+    readonly registration: ServiceWorkerRegistration;
+    skipWaiting(): Promise<void>;
+    addEventListener<K extends keyof ServiceWorkerGlobalScopeEventMap>(type: K, listener: (this: ServiceWorkerGlobalScope, ev: ServiceWorkerGlobalScopeEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var ServiceWorkerGlobalScope: {
+    prototype: ServiceWorkerGlobalScope;
+    new(): ServiceWorkerGlobalScope;
+};
+
+interface SyncEvent extends ExtendableEvent {
+    readonly lastChance: boolean;
+    readonly tag: string;
+}
+
+declare var SyncEvent: {
+    prototype: SyncEvent;
+    new(type: string, init: SyncEventInit): SyncEvent;
+};
+
+interface WindowClient extends Client {
+    readonly focused: boolean;
+    readonly visibilityState: VisibilityState;
+    focus(): Promise<WindowClient>;
+    navigate(url: USVString): Promise<WindowClient>;
+}
+
+declare var WindowClient: {
+    prototype: WindowClient;
+    new(): WindowClient;
+};
+
+interface WorkerGlobalScopeEventMap {
+    "error": ErrorEvent;
+}
+
+interface WorkerGlobalScope extends EventTarget, WorkerUtils, WindowConsole, GlobalFetch {
+    readonly caches: CacheStorage;
+    readonly isSecureContext: boolean;
+    readonly location: WorkerLocation;
+    onerror: (this: WorkerGlobalScope, ev: ErrorEvent) => any;
+    readonly performance: Performance;
+    readonly self: WorkerGlobalScope;
+    msWriteProfilerMark(profilerMarkName: string): void;
+    createImageBitmap(image: ImageBitmap | ImageData | Blob, options?: ImageBitmapOptions): Promise<ImageBitmap>;
+    createImageBitmap(image: ImageBitmap | ImageData | Blob, sx: number, sy: number, sw: number, sh: number, options?: ImageBitmapOptions): Promise<ImageBitmap>;
+    addEventListener<K extends keyof WorkerGlobalScopeEventMap>(type: K, listener: (this: WorkerGlobalScope, ev: WorkerGlobalScopeEventMap[K]) => any, useCapture?: boolean): void;
+    addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+}
+
+declare var WorkerGlobalScope: {
+    prototype: WorkerGlobalScope;
+    new(): WorkerGlobalScope;
+};
+
+interface WorkerLocation {
+    readonly hash: string;
+    readonly host: string;
+    readonly hostname: string;
+    readonly href: string;
+    readonly origin: string;
+    readonly pathname: string;
+    readonly port: string;
+    readonly protocol: string;
+    readonly search: string;
+    toString(): string;
+}
+
+declare var WorkerLocation: {
+    prototype: WorkerLocation;
+    new(): WorkerLocation;
+};
+
+interface WorkerNavigator extends Object, NavigatorID, NavigatorOnLine, NavigatorBeacon, NavigatorConcurrentHardware {
+    readonly hardwareConcurrency: number;
+}
+
+declare var WorkerNavigator: {
+    prototype: WorkerNavigator;
+    new(): WorkerNavigator;
+};
+
+interface WorkerUtils extends Object, WindowBase64 {
+    readonly indexedDB: IDBFactory;
+    readonly msIndexedDB: IDBFactory;
+    readonly navigator: WorkerNavigator;
+    clearImmediate(handle: number): void;
+    clearInterval(handle: number): void;
+    clearTimeout(handle: number): void;
+    importScripts(...urls: string[]): void;
+    setImmediate(handler: (...args: any[]) => void): number;
+    setImmediate(handler: any, ...args: any[]): number;
+    setInterval(handler: (...args: any[]) => void, timeout: number): number;
+    setInterval(handler: any, timeout?: any, ...args: any[]): number;
+    setTimeout(handler: (...args: any[]) => void, timeout: number): number;
+    setTimeout(handler: any, timeout?: any, ...args: any[]): number;
+}
+
+interface ErrorEventInit {
+    message?: string;
+    filename?: string;
+    lineno?: number;
+    conlno?: number;
+    error?: any;
+}
+
+interface ImageBitmapOptions {
+    imageOrientation?: "none" | "flipY";
+    premultiplyAlpha?: "none" | "premultiply" | "default";
+    colorSpaceConversion?: "none" | "default";
+    resizeWidth?: number;
+    resizeHeight?: number;
+    resizeQuality?: "pixelated" | "low" | "medium" | "high";
+}
+
+interface ImageBitmap {
+    readonly width: number;
+    readonly height: number;
+    close(): void;
+}
+
+interface URLSearchParams {
+    /**
+     * Appends a specified key/value pair as a new search parameter.
+     */
+    append(name: string, value: string): void;
+    /**
+     * Deletes the given search parameter, and its associated value, from the list of all search parameters.
+     */
+    delete(name: string): void;
+    /**
+     * Returns the first value associated to the given search parameter.
+     */
+    get(name: string): string | null;
+    /**
+     * Returns all the values association with a given search parameter.
+     */
+    getAll(name: string): string[];
+    /**
+     * Returns a Boolean indicating if such a search parameter exists.
+     */
+    has(name: string): boolean;
+    /**
+     * Sets the value associated to a given search parameter to the given value. If there were several values, delete the others.
+     */
+    set(name: string, value: string): void;
+}
+
+declare var URLSearchParams: {
+    prototype: URLSearchParams;
+    /**
+     * Constructor returning a URLSearchParams object.
+     */
+    new (init?: string | URLSearchParams): URLSearchParams;
+};
+
+interface BlobPropertyBag {
+    type?: string;
+    endings?: string;
+}
+
+interface FilePropertyBag {
+    type?: string;
+    lastModified?: number;
+}
+
+interface EventListenerObject {
+    handleEvent(evt: Event): void;
+}
+
+interface ProgressEventInit extends EventInit {
+    lengthComputable?: boolean;
+    loaded?: number;
+    total?: number;
+}
+
+interface IDBArrayKey extends Array<IDBValidKey> {
+}
+
+interface RsaKeyGenParams extends Algorithm {
+    modulusLength: number;
+    publicExponent: Uint8Array;
+}
+
+interface RsaHashedKeyGenParams extends RsaKeyGenParams {
+    hash: AlgorithmIdentifier;
+}
+
+interface RsaKeyAlgorithm extends KeyAlgorithm {
+    modulusLength: number;
+    publicExponent: Uint8Array;
+}
+
+interface RsaHashedKeyAlgorithm extends RsaKeyAlgorithm {
+    hash: AlgorithmIdentifier;
+}
+
+interface RsaHashedImportParams {
+    hash: AlgorithmIdentifier;
+}
+
+interface RsaPssParams {
+    saltLength: number;
+}
+
+interface RsaOaepParams extends Algorithm {
+    label?: BufferSource;
+}
+
+interface EcdsaParams extends Algorithm {
+    hash: AlgorithmIdentifier;
+}
+
+interface EcKeyGenParams extends Algorithm {
+    namedCurve: string;
+}
+
+interface EcKeyAlgorithm extends KeyAlgorithm {
+    typedCurve: string;
+}
+
+interface EcKeyImportParams {
+    namedCurve: string;
+}
+
+interface EcdhKeyDeriveParams extends Algorithm {
+    public: CryptoKey;
+}
+
+interface AesCtrParams extends Algorithm {
+    counter: BufferSource;
+    length: number;
+}
+
+interface AesKeyAlgorithm extends KeyAlgorithm {
+    length: number;
+}
+
+interface AesKeyGenParams extends Algorithm {
+    length: number;
+}
+
+interface AesDerivedKeyParams extends Algorithm {
+    length: number;
+}
+
+interface AesCbcParams extends Algorithm {
+    iv: BufferSource;
+}
+
+interface AesCmacParams extends Algorithm {
+    length: number;
+}
+
+interface AesGcmParams extends Algorithm {
+    iv: BufferSource;
+    additionalData?: BufferSource;
+    tagLength?: number;
+}
+
+interface AesCfbParams extends Algorithm {
+    iv: BufferSource;
+}
+
+interface HmacImportParams extends Algorithm {
+    hash?: AlgorithmIdentifier;
+    length?: number;
+}
+
+interface HmacKeyAlgorithm extends KeyAlgorithm {
+    hash: AlgorithmIdentifier;
+    length: number;
+}
+
+interface HmacKeyGenParams extends Algorithm {
+    hash: AlgorithmIdentifier;
+    length?: number;
+}
+
+interface DhKeyGenParams extends Algorithm {
+    prime: Uint8Array;
+    generator: Uint8Array;
+}
+
+interface DhKeyAlgorithm extends KeyAlgorithm {
+    prime: Uint8Array;
+    generator: Uint8Array;
+}
+
+interface DhKeyDeriveParams extends Algorithm {
+    public: CryptoKey;
+}
+
+interface DhImportKeyParams extends Algorithm {
+    prime: Uint8Array;
+    generator: Uint8Array;
+}
+
+interface ConcatParams extends Algorithm {
+    hash?: AlgorithmIdentifier;
+    algorithmId: Uint8Array;
+    partyUInfo: Uint8Array;
+    partyVInfo: Uint8Array;
+    publicInfo?: Uint8Array;
+    privateInfo?: Uint8Array;
+}
+
+interface HkdfCtrParams extends Algorithm {
+    hash: AlgorithmIdentifier;
+    label: BufferSource;
+    context: BufferSource;
+}
+
+interface Pbkdf2Params extends Algorithm {
+    salt: BufferSource;
+    iterations: number;
+    hash: AlgorithmIdentifier;
+}
+
+interface RsaOtherPrimesInfo {
+    r: string;
+    d: string;
+    t: string;
+}
+
+interface JsonWebKey {
+    kty: string;
+    use?: string;
+    key_ops?: string[];
+    alg?: string;
+    kid?: string;
+    x5u?: string;
+    x5c?: string;
+    x5t?: string;
+    ext?: boolean;
+    crv?: string;
+    x?: string;
+    y?: string;
+    d?: string;
+    n?: string;
+    e?: string;
+    p?: string;
+    q?: string;
+    dp?: string;
+    dq?: string;
+    qi?: string;
+    oth?: RsaOtherPrimesInfo[];
+    k?: string;
+}
+
+interface EventListenerOptions {
+    capture?: boolean;
+}
+
+interface AddEventListenerOptions extends EventListenerOptions {
+    passive?: boolean;
+    once?: boolean;
+}
+
+declare type EventListenerOrEventListenerObject = EventListener | EventListenerObject;
+
+interface DecodeErrorCallback {
+    (error: DOMException): void;
+}
+interface DecodeSuccessCallback {
+    (decodedData: AudioBuffer): void;
+}
+interface ErrorEventHandler {
+    (message: string, filename?: string, lineno?: number, colno?: number, error?: Error): void;
+}
+interface ForEachCallback {
+    (keyId: any, status: MediaKeyStatus): void;
+}
+interface FunctionStringCallback {
+    (data: string): void;
+}
+interface NotificationPermissionCallback {
+    (permission: NotificationPermission): void;
+}
+interface PositionCallback {
+    (position: Position): void;
+}
+interface PositionErrorCallback {
+    (error: PositionError): void;
+}
+declare var onmessage: (this: DedicatedWorkerGlobalScope, ev: MessageEvent) => any;
+declare function close(): void;
+declare function postMessage(message: any, transfer?: any[]): void;
+declare var caches: CacheStorage;
+declare var isSecureContext: boolean;
+declare var location: WorkerLocation;
+declare var onerror: (this: DedicatedWorkerGlobalScope, ev: ErrorEvent) => any;
+declare var performance: Performance;
+declare var self: WorkerGlobalScope;
+declare function msWriteProfilerMark(profilerMarkName: string): void;
+declare function createImageBitmap(image: ImageBitmap | ImageData | Blob, options?: ImageBitmapOptions): Promise<ImageBitmap>;
+declare function createImageBitmap(image: ImageBitmap | ImageData | Blob, sx: number, sy: number, sw: number, sh: number, options?: ImageBitmapOptions): Promise<ImageBitmap>;
+declare function dispatchEvent(evt: Event): boolean;
+declare function removeEventListener(type: string, listener?: EventListenerOrEventListenerObject, options?: boolean | EventListenerOptions): void;
+declare var indexedDB: IDBFactory;
+declare var msIndexedDB: IDBFactory;
+declare var navigator: WorkerNavigator;
+declare function clearImmediate(handle: number): void;
+declare function clearInterval(handle: number): void;
+declare function clearTimeout(handle: number): void;
+declare function importScripts(...urls: string[]): void;
+declare function setImmediate(handler: (...args: any[]) => void): number;
+declare function setImmediate(handler: any, ...args: any[]): number;
+declare function setInterval(handler: (...args: any[]) => void, timeout: number): number;
+declare function setInterval(handler: any, timeout?: any, ...args: any[]): number;
+declare function setTimeout(handler: (...args: any[]) => void, timeout: number): number;
+declare function setTimeout(handler: any, timeout?: any, ...args: any[]): number;
+declare function atob(encodedString: string): string;
+declare function btoa(rawString: string): string;
+declare var console: Console;
+declare function fetch(input: RequestInfo, init?: RequestInit): Promise<Response>;
+declare function dispatchEvent(evt: Event): boolean;
+declare function removeEventListener(type: string, listener?: EventListenerOrEventListenerObject, options?: boolean | EventListenerOptions): void;
+declare function addEventListener<K extends keyof DedicatedWorkerGlobalScopeEventMap>(type: K, listener: (this: DedicatedWorkerGlobalScope, ev: DedicatedWorkerGlobalScopeEventMap[K]) => any, useCapture?: boolean): void;
+declare function addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+type AlgorithmIdentifier = string | Algorithm;
+type BodyInit = any;
+type IDBKeyPath = string;
+type RequestInfo = Request | string;
+type USVString = string;
+type IDBValidKey = number | string | Date | IDBArrayKey;
+type BufferSource = ArrayBuffer | ArrayBufferView;
+type FormDataEntryValue = string | File;
+type IDBCursorDirection = "next" | "nextunique" | "prev" | "prevunique";
+type IDBRequestReadyState = "pending" | "done";
+type IDBTransactionMode = "readonly" | "readwrite" | "versionchange";
+type MediaKeyStatus = "usable" | "expired" | "output-downscaled" | "output-not-allowed" | "status-pending" | "internal-error";
+type NotificationDirection = "auto" | "ltr" | "rtl";
+type NotificationPermission = "default" | "denied" | "granted";
+type PushEncryptionKeyName = "p256dh" | "auth";
+type PushPermissionState = "granted" | "denied" | "prompt";
+type ReferrerPolicy = "" | "no-referrer" | "no-referrer-when-downgrade" | "origin-only" | "origin-when-cross-origin" | "unsafe-url";
+type RequestCache = "default" | "no-store" | "reload" | "no-cache" | "force-cache";
+type RequestCredentials = "omit" | "same-origin" | "include";
+type RequestDestination = "" | "document" | "sharedworker" | "subresource" | "unknown" | "worker";
+type RequestMode = "navigate" | "same-origin" | "no-cors" | "cors";
+type RequestRedirect = "follow" | "error" | "manual";
+type RequestType = "" | "audio" | "font" | "image" | "script" | "style" | "track" | "video";
+type ResponseType = "basic" | "cors" | "default" | "error" | "opaque" | "opaqueredirect";
+type ServiceWorkerState = "installing" | "installed" | "activating" | "activated" | "redundant";
+type VisibilityState = "hidden" | "visible" | "prerender" | "unloaded";
+type XMLHttpRequestResponseType = "" | "arraybuffer" | "blob" | "document" | "json" | "text";
+type ClientType = "window" | "worker" | "sharedworker" | "all";
+type FrameType = "auxiliary" | "top-level" | "nested" | "none";
\ No newline at end of file
diff --git a/bin/ntypescript.d.ts b/bin/ntypescript.d.ts
index 0f242ff..92206c4 100644
--- a/bin/ntypescript.d.ts
+++ b/bin/ntypescript.d.ts
@@ -1,9 +1,34 @@
 declare namespace ts {
+    /**
+     * Type of objects whose values are all of the same type.
+     * The `in` and `for-in` operators can *not* be safely used,
+     * since `Object.prototype` may be modified by outside code.
+     */
     interface MapLike<T> {
         [index: string]: T;
     }
-    interface Map<T> extends MapLike<T> {
-        __mapBrand: any;
+    /** ES6 Map interface. */
+    interface Map<T> {
+        get(key: string): T | undefined;
+        has(key: string): boolean;
+        set(key: string, value: T): this;
+        delete(key: string): boolean;
+        clear(): void;
+        forEach(action: (value: T, key: string) => void): void;
+        readonly size: number;
+        keys(): Iterator<string>;
+        values(): Iterator<T>;
+        entries(): Iterator<[string, T]>;
+    }
+    /** ES6 Iterator type. */
+    interface Iterator<T> {
+        next(): {
+            value: T;
+            done: false;
+        } | {
+            value: never;
+            done: true;
+        };
     }
     type Path = string & {
         __pathBrand: any;
@@ -32,315 +57,327 @@ declare namespace ts {
         ConflictMarkerTrivia = 7,
         NumericLiteral = 8,
         StringLiteral = 9,
-        RegularExpressionLiteral = 10,
-        NoSubstitutionTemplateLiteral = 11,
-        TemplateHead = 12,
-        TemplateMiddle = 13,
-        TemplateTail = 14,
-        OpenBraceToken = 15,
-        CloseBraceToken = 16,
-        OpenParenToken = 17,
-        CloseParenToken = 18,
-        OpenBracketToken = 19,
-        CloseBracketToken = 20,
-        DotToken = 21,
-        DotDotDotToken = 22,
-        SemicolonToken = 23,
-        CommaToken = 24,
-        LessThanToken = 25,
-        LessThanSlashToken = 26,
-        GreaterThanToken = 27,
-        LessThanEqualsToken = 28,
-        GreaterThanEqualsToken = 29,
-        EqualsEqualsToken = 30,
-        ExclamationEqualsToken = 31,
-        EqualsEqualsEqualsToken = 32,
-        ExclamationEqualsEqualsToken = 33,
-        EqualsGreaterThanToken = 34,
-        PlusToken = 35,
-        MinusToken = 36,
-        AsteriskToken = 37,
-        AsteriskAsteriskToken = 38,
-        SlashToken = 39,
-        PercentToken = 40,
-        PlusPlusToken = 41,
-        MinusMinusToken = 42,
-        LessThanLessThanToken = 43,
-        GreaterThanGreaterThanToken = 44,
-        GreaterThanGreaterThanGreaterThanToken = 45,
-        AmpersandToken = 46,
-        BarToken = 47,
-        CaretToken = 48,
-        ExclamationToken = 49,
-        TildeToken = 50,
-        AmpersandAmpersandToken = 51,
-        BarBarToken = 52,
-        QuestionToken = 53,
-        ColonToken = 54,
-        AtToken = 55,
-        EqualsToken = 56,
-        PlusEqualsToken = 57,
-        MinusEqualsToken = 58,
-        AsteriskEqualsToken = 59,
-        AsteriskAsteriskEqualsToken = 60,
-        SlashEqualsToken = 61,
-        PercentEqualsToken = 62,
-        LessThanLessThanEqualsToken = 63,
-        GreaterThanGreaterThanEqualsToken = 64,
-        GreaterThanGreaterThanGreaterThanEqualsToken = 65,
-        AmpersandEqualsToken = 66,
-        BarEqualsToken = 67,
-        CaretEqualsToken = 68,
-        Identifier = 69,
-        BreakKeyword = 70,
-        CaseKeyword = 71,
-        CatchKeyword = 72,
-        ClassKeyword = 73,
-        ConstKeyword = 74,
-        ContinueKeyword = 75,
-        DebuggerKeyword = 76,
-        DefaultKeyword = 77,
-        DeleteKeyword = 78,
-        DoKeyword = 79,
-        ElseKeyword = 80,
-        EnumKeyword = 81,
-        ExportKeyword = 82,
-        ExtendsKeyword = 83,
-        FalseKeyword = 84,
-        FinallyKeyword = 85,
-        ForKeyword = 86,
-        FunctionKeyword = 87,
-        IfKeyword = 88,
-        ImportKeyword = 89,
-        InKeyword = 90,
-        InstanceOfKeyword = 91,
-        NewKeyword = 92,
-        NullKeyword = 93,
-        ReturnKeyword = 94,
-        SuperKeyword = 95,
-        SwitchKeyword = 96,
-        ThisKeyword = 97,
-        ThrowKeyword = 98,
-        TrueKeyword = 99,
-        TryKeyword = 100,
-        TypeOfKeyword = 101,
-        VarKeyword = 102,
-        VoidKeyword = 103,
-        WhileKeyword = 104,
-        WithKeyword = 105,
-        ImplementsKeyword = 106,
-        InterfaceKeyword = 107,
-        LetKeyword = 108,
-        PackageKeyword = 109,
-        PrivateKeyword = 110,
-        ProtectedKeyword = 111,
-        PublicKeyword = 112,
-        StaticKeyword = 113,
-        YieldKeyword = 114,
-        AbstractKeyword = 115,
-        AsKeyword = 116,
-        AnyKeyword = 117,
-        AsyncKeyword = 118,
-        AwaitKeyword = 119,
-        BooleanKeyword = 120,
-        ConstructorKeyword = 121,
-        DeclareKeyword = 122,
-        GetKeyword = 123,
-        IsKeyword = 124,
-        ModuleKeyword = 125,
-        NamespaceKeyword = 126,
-        NeverKeyword = 127,
-        ReadonlyKeyword = 128,
-        RequireKeyword = 129,
-        NumberKeyword = 130,
-        SetKeyword = 131,
-        StringKeyword = 132,
-        SymbolKeyword = 133,
-        TypeKeyword = 134,
-        UndefinedKeyword = 135,
-        FromKeyword = 136,
-        GlobalKeyword = 137,
-        OfKeyword = 138,
-        QualifiedName = 139,
-        ComputedPropertyName = 140,
-        TypeParameter = 141,
-        Parameter = 142,
-        Decorator = 143,
-        PropertySignature = 144,
-        PropertyDeclaration = 145,
-        MethodSignature = 146,
-        MethodDeclaration = 147,
-        Constructor = 148,
-        GetAccessor = 149,
-        SetAccessor = 150,
-        CallSignature = 151,
-        ConstructSignature = 152,
-        IndexSignature = 153,
-        TypePredicate = 154,
-        TypeReference = 155,
-        FunctionType = 156,
-        ConstructorType = 157,
-        TypeQuery = 158,
-        TypeLiteral = 159,
-        ArrayType = 160,
-        TupleType = 161,
-        UnionType = 162,
-        IntersectionType = 163,
-        ParenthesizedType = 164,
-        ThisType = 165,
-        LiteralType = 166,
-        ObjectBindingPattern = 167,
-        ArrayBindingPattern = 168,
-        BindingElement = 169,
-        ArrayLiteralExpression = 170,
-        ObjectLiteralExpression = 171,
-        PropertyAccessExpression = 172,
-        ElementAccessExpression = 173,
-        CallExpression = 174,
-        NewExpression = 175,
-        TaggedTemplateExpression = 176,
-        TypeAssertionExpression = 177,
-        ParenthesizedExpression = 178,
-        FunctionExpression = 179,
-        ArrowFunction = 180,
-        DeleteExpression = 181,
-        TypeOfExpression = 182,
-        VoidExpression = 183,
-        AwaitExpression = 184,
-        PrefixUnaryExpression = 185,
-        PostfixUnaryExpression = 186,
-        BinaryExpression = 187,
-        ConditionalExpression = 188,
-        TemplateExpression = 189,
-        YieldExpression = 190,
-        SpreadElementExpression = 191,
-        ClassExpression = 192,
-        OmittedExpression = 193,
-        ExpressionWithTypeArguments = 194,
-        AsExpression = 195,
-        NonNullExpression = 196,
-        TemplateSpan = 197,
-        SemicolonClassElement = 198,
-        Block = 199,
-        VariableStatement = 200,
-        EmptyStatement = 201,
-        ExpressionStatement = 202,
-        IfStatement = 203,
-        DoStatement = 204,
-        WhileStatement = 205,
-        ForStatement = 206,
-        ForInStatement = 207,
-        ForOfStatement = 208,
-        ContinueStatement = 209,
-        BreakStatement = 210,
-        ReturnStatement = 211,
-        WithStatement = 212,
-        SwitchStatement = 213,
-        LabeledStatement = 214,
-        ThrowStatement = 215,
-        TryStatement = 216,
-        DebuggerStatement = 217,
-        VariableDeclaration = 218,
-        VariableDeclarationList = 219,
-        FunctionDeclaration = 220,
-        ClassDeclaration = 221,
-        InterfaceDeclaration = 222,
-        TypeAliasDeclaration = 223,
-        EnumDeclaration = 224,
-        ModuleDeclaration = 225,
-        ModuleBlock = 226,
-        CaseBlock = 227,
-        NamespaceExportDeclaration = 228,
-        ImportEqualsDeclaration = 229,
-        ImportDeclaration = 230,
-        ImportClause = 231,
-        NamespaceImport = 232,
-        NamedImports = 233,
-        ImportSpecifier = 234,
-        ExportAssignment = 235,
-        ExportDeclaration = 236,
-        NamedExports = 237,
-        ExportSpecifier = 238,
-        MissingDeclaration = 239,
-        ExternalModuleReference = 240,
-        JsxElement = 241,
-        JsxSelfClosingElement = 242,
-        JsxOpeningElement = 243,
-        JsxText = 244,
-        JsxClosingElement = 245,
-        JsxAttribute = 246,
-        JsxSpreadAttribute = 247,
-        JsxExpression = 248,
-        CaseClause = 249,
-        DefaultClause = 250,
-        HeritageClause = 251,
-        CatchClause = 252,
-        PropertyAssignment = 253,
-        ShorthandPropertyAssignment = 254,
-        EnumMember = 255,
-        SourceFile = 256,
-        JSDocTypeExpression = 257,
-        JSDocAllType = 258,
-        JSDocUnknownType = 259,
-        JSDocArrayType = 260,
-        JSDocUnionType = 261,
-        JSDocTupleType = 262,
-        JSDocNullableType = 263,
-        JSDocNonNullableType = 264,
-        JSDocRecordType = 265,
-        JSDocRecordMember = 266,
-        JSDocTypeReference = 267,
-        JSDocOptionalType = 268,
-        JSDocFunctionType = 269,
-        JSDocVariadicType = 270,
-        JSDocConstructorType = 271,
-        JSDocThisType = 272,
-        JSDocComment = 273,
-        JSDocTag = 274,
-        JSDocParameterTag = 275,
-        JSDocReturnTag = 276,
-        JSDocTypeTag = 277,
-        JSDocTemplateTag = 278,
-        JSDocTypedefTag = 279,
-        JSDocPropertyTag = 280,
-        JSDocTypeLiteral = 281,
-        JSDocLiteralType = 282,
-        JSDocNullKeyword = 283,
-        JSDocUndefinedKeyword = 284,
-        JSDocNeverKeyword = 285,
-        SyntaxList = 286,
-        NotEmittedStatement = 287,
-        PartiallyEmittedExpression = 288,
-        Count = 289,
-        FirstAssignment = 56,
-        LastAssignment = 68,
-        FirstCompoundAssignment = 57,
-        LastCompoundAssignment = 68,
-        FirstReservedWord = 70,
-        LastReservedWord = 105,
-        FirstKeyword = 70,
-        LastKeyword = 138,
-        FirstFutureReservedWord = 106,
-        LastFutureReservedWord = 114,
-        FirstTypeNode = 154,
-        LastTypeNode = 166,
-        FirstPunctuation = 15,
-        LastPunctuation = 68,
+        JsxText = 10,
+        JsxTextAllWhiteSpaces = 11,
+        RegularExpressionLiteral = 12,
+        NoSubstitutionTemplateLiteral = 13,
+        TemplateHead = 14,
+        TemplateMiddle = 15,
+        TemplateTail = 16,
+        OpenBraceToken = 17,
+        CloseBraceToken = 18,
+        OpenParenToken = 19,
+        CloseParenToken = 20,
+        OpenBracketToken = 21,
+        CloseBracketToken = 22,
+        DotToken = 23,
+        DotDotDotToken = 24,
+        SemicolonToken = 25,
+        CommaToken = 26,
+        LessThanToken = 27,
+        LessThanSlashToken = 28,
+        GreaterThanToken = 29,
+        LessThanEqualsToken = 30,
+        GreaterThanEqualsToken = 31,
+        EqualsEqualsToken = 32,
+        ExclamationEqualsToken = 33,
+        EqualsEqualsEqualsToken = 34,
+        ExclamationEqualsEqualsToken = 35,
+        EqualsGreaterThanToken = 36,
+        PlusToken = 37,
+        MinusToken = 38,
+        AsteriskToken = 39,
+        AsteriskAsteriskToken = 40,
+        SlashToken = 41,
+        PercentToken = 42,
+        PlusPlusToken = 43,
+        MinusMinusToken = 44,
+        LessThanLessThanToken = 45,
+        GreaterThanGreaterThanToken = 46,
+        GreaterThanGreaterThanGreaterThanToken = 47,
+        AmpersandToken = 48,
+        BarToken = 49,
+        CaretToken = 50,
+        ExclamationToken = 51,
+        TildeToken = 52,
+        AmpersandAmpersandToken = 53,
+        BarBarToken = 54,
+        QuestionToken = 55,
+        ColonToken = 56,
+        AtToken = 57,
+        EqualsToken = 58,
+        PlusEqualsToken = 59,
+        MinusEqualsToken = 60,
+        AsteriskEqualsToken = 61,
+        AsteriskAsteriskEqualsToken = 62,
+        SlashEqualsToken = 63,
+        PercentEqualsToken = 64,
+        LessThanLessThanEqualsToken = 65,
+        GreaterThanGreaterThanEqualsToken = 66,
+        GreaterThanGreaterThanGreaterThanEqualsToken = 67,
+        AmpersandEqualsToken = 68,
+        BarEqualsToken = 69,
+        CaretEqualsToken = 70,
+        Identifier = 71,
+        BreakKeyword = 72,
+        CaseKeyword = 73,
+        CatchKeyword = 74,
+        ClassKeyword = 75,
+        ConstKeyword = 76,
+        ContinueKeyword = 77,
+        DebuggerKeyword = 78,
+        DefaultKeyword = 79,
+        DeleteKeyword = 80,
+        DoKeyword = 81,
+        ElseKeyword = 82,
+        EnumKeyword = 83,
+        ExportKeyword = 84,
+        ExtendsKeyword = 85,
+        FalseKeyword = 86,
+        FinallyKeyword = 87,
+        ForKeyword = 88,
+        FunctionKeyword = 89,
+        IfKeyword = 90,
+        ImportKeyword = 91,
+        InKeyword = 92,
+        InstanceOfKeyword = 93,
+        NewKeyword = 94,
+        NullKeyword = 95,
+        ReturnKeyword = 96,
+        SuperKeyword = 97,
+        SwitchKeyword = 98,
+        ThisKeyword = 99,
+        ThrowKeyword = 100,
+        TrueKeyword = 101,
+        TryKeyword = 102,
+        TypeOfKeyword = 103,
+        VarKeyword = 104,
+        VoidKeyword = 105,
+        WhileKeyword = 106,
+        WithKeyword = 107,
+        ImplementsKeyword = 108,
+        InterfaceKeyword = 109,
+        LetKeyword = 110,
+        PackageKeyword = 111,
+        PrivateKeyword = 112,
+        ProtectedKeyword = 113,
+        PublicKeyword = 114,
+        StaticKeyword = 115,
+        YieldKeyword = 116,
+        AbstractKeyword = 117,
+        AsKeyword = 118,
+        AnyKeyword = 119,
+        AsyncKeyword = 120,
+        AwaitKeyword = 121,
+        BooleanKeyword = 122,
+        ConstructorKeyword = 123,
+        DeclareKeyword = 124,
+        GetKeyword = 125,
+        IsKeyword = 126,
+        KeyOfKeyword = 127,
+        ModuleKeyword = 128,
+        NamespaceKeyword = 129,
+        NeverKeyword = 130,
+        ReadonlyKeyword = 131,
+        RequireKeyword = 132,
+        NumberKeyword = 133,
+        ObjectKeyword = 134,
+        SetKeyword = 135,
+        StringKeyword = 136,
+        SymbolKeyword = 137,
+        TypeKeyword = 138,
+        UndefinedKeyword = 139,
+        FromKeyword = 140,
+        GlobalKeyword = 141,
+        OfKeyword = 142,
+        QualifiedName = 143,
+        ComputedPropertyName = 144,
+        TypeParameter = 145,
+        Parameter = 146,
+        Decorator = 147,
+        PropertySignature = 148,
+        PropertyDeclaration = 149,
+        MethodSignature = 150,
+        MethodDeclaration = 151,
+        Constructor = 152,
+        GetAccessor = 153,
+        SetAccessor = 154,
+        CallSignature = 155,
+        ConstructSignature = 156,
+        IndexSignature = 157,
+        TypePredicate = 158,
+        TypeReference = 159,
+        FunctionType = 160,
+        ConstructorType = 161,
+        TypeQuery = 162,
+        TypeLiteral = 163,
+        ArrayType = 164,
+        TupleType = 165,
+        UnionType = 166,
+        IntersectionType = 167,
+        ParenthesizedType = 168,
+        ThisType = 169,
+        TypeOperator = 170,
+        IndexedAccessType = 171,
+        MappedType = 172,
+        LiteralType = 173,
+        ObjectBindingPattern = 174,
+        ArrayBindingPattern = 175,
+        BindingElement = 176,
+        ArrayLiteralExpression = 177,
+        ObjectLiteralExpression = 178,
+        PropertyAccessExpression = 179,
+        ElementAccessExpression = 180,
+        CallExpression = 181,
+        NewExpression = 182,
+        TaggedTemplateExpression = 183,
+        TypeAssertionExpression = 184,
+        ParenthesizedExpression = 185,
+        FunctionExpression = 186,
+        ArrowFunction = 187,
+        DeleteExpression = 188,
+        TypeOfExpression = 189,
+        VoidExpression = 190,
+        AwaitExpression = 191,
+        PrefixUnaryExpression = 192,
+        PostfixUnaryExpression = 193,
+        BinaryExpression = 194,
+        ConditionalExpression = 195,
+        TemplateExpression = 196,
+        YieldExpression = 197,
+        SpreadElement = 198,
+        ClassExpression = 199,
+        OmittedExpression = 200,
+        ExpressionWithTypeArguments = 201,
+        AsExpression = 202,
+        NonNullExpression = 203,
+        MetaProperty = 204,
+        TemplateSpan = 205,
+        SemicolonClassElement = 206,
+        Block = 207,
+        VariableStatement = 208,
+        EmptyStatement = 209,
+        ExpressionStatement = 210,
+        IfStatement = 211,
+        DoStatement = 212,
+        WhileStatement = 213,
+        ForStatement = 214,
+        ForInStatement = 215,
+        ForOfStatement = 216,
+        ContinueStatement = 217,
+        BreakStatement = 218,
+        ReturnStatement = 219,
+        WithStatement = 220,
+        SwitchStatement = 221,
+        LabeledStatement = 222,
+        ThrowStatement = 223,
+        TryStatement = 224,
+        DebuggerStatement = 225,
+        VariableDeclaration = 226,
+        VariableDeclarationList = 227,
+        FunctionDeclaration = 228,
+        ClassDeclaration = 229,
+        InterfaceDeclaration = 230,
+        TypeAliasDeclaration = 231,
+        EnumDeclaration = 232,
+        ModuleDeclaration = 233,
+        ModuleBlock = 234,
+        CaseBlock = 235,
+        NamespaceExportDeclaration = 236,
+        ImportEqualsDeclaration = 237,
+        ImportDeclaration = 238,
+        ImportClause = 239,
+        NamespaceImport = 240,
+        NamedImports = 241,
+        ImportSpecifier = 242,
+        ExportAssignment = 243,
+        ExportDeclaration = 244,
+        NamedExports = 245,
+        ExportSpecifier = 246,
+        MissingDeclaration = 247,
+        ExternalModuleReference = 248,
+        JsxElement = 249,
+        JsxSelfClosingElement = 250,
+        JsxOpeningElement = 251,
+        JsxClosingElement = 252,
+        JsxAttribute = 253,
+        JsxAttributes = 254,
+        JsxSpreadAttribute = 255,
+        JsxExpression = 256,
+        CaseClause = 257,
+        DefaultClause = 258,
+        HeritageClause = 259,
+        CatchClause = 260,
+        PropertyAssignment = 261,
+        ShorthandPropertyAssignment = 262,
+        SpreadAssignment = 263,
+        EnumMember = 264,
+        SourceFile = 265,
+        Bundle = 266,
+        JSDocTypeExpression = 267,
+        JSDocAllType = 268,
+        JSDocUnknownType = 269,
+        JSDocArrayType = 270,
+        JSDocUnionType = 271,
+        JSDocTupleType = 272,
+        JSDocNullableType = 273,
+        JSDocNonNullableType = 274,
+        JSDocRecordType = 275,
+        JSDocRecordMember = 276,
+        JSDocTypeReference = 277,
+        JSDocOptionalType = 278,
+        JSDocFunctionType = 279,
+        JSDocVariadicType = 280,
+        JSDocConstructorType = 281,
+        JSDocThisType = 282,
+        JSDocComment = 283,
+        JSDocTag = 284,
+        JSDocAugmentsTag = 285,
+        JSDocClassTag = 286,
+        JSDocParameterTag = 287,
+        JSDocReturnTag = 288,
+        JSDocTypeTag = 289,
+        JSDocTemplateTag = 290,
+        JSDocTypedefTag = 291,
+        JSDocPropertyTag = 292,
+        JSDocTypeLiteral = 293,
+        JSDocLiteralType = 294,
+        SyntaxList = 295,
+        NotEmittedStatement = 296,
+        PartiallyEmittedExpression = 297,
+        CommaListExpression = 298,
+        MergeDeclarationMarker = 299,
+        EndOfDeclarationMarker = 300,
+        Count = 301,
+        FirstAssignment = 58,
+        LastAssignment = 70,
+        FirstCompoundAssignment = 59,
+        LastCompoundAssignment = 70,
+        FirstReservedWord = 72,
+        LastReservedWord = 107,
+        FirstKeyword = 72,
+        LastKeyword = 142,
+        FirstFutureReservedWord = 108,
+        LastFutureReservedWord = 116,
+        FirstTypeNode = 158,
+        LastTypeNode = 173,
+        FirstPunctuation = 17,
+        LastPunctuation = 70,
         FirstToken = 0,
-        LastToken = 138,
+        LastToken = 142,
         FirstTriviaToken = 2,
         LastTriviaToken = 7,
         FirstLiteralToken = 8,
-        LastLiteralToken = 11,
-        FirstTemplateToken = 11,
-        LastTemplateToken = 14,
-        FirstBinaryOperator = 25,
-        LastBinaryOperator = 68,
-        FirstNode = 139,
-        FirstJSDocNode = 257,
-        LastJSDocNode = 282,
-        FirstJSDocTagNode = 273,
-        LastJSDocTagNode = 285,
+        LastLiteralToken = 13,
+        FirstTemplateToken = 13,
+        LastTemplateToken = 16,
+        FirstBinaryOperator = 27,
+        LastBinaryOperator = 70,
+        FirstNode = 143,
+        FirstJSDocNode = 267,
+        LastJSDocNode = 294,
+        FirstJSDocTagNode = 284,
+        LastJSDocTagNode = 294,
     }
     enum NodeFlags {
         None = 0,
@@ -354,27 +391,22 @@ declare namespace ts {
         HasImplicitReturn = 128,
         HasExplicitReturn = 256,
         GlobalAugmentation = 512,
-        HasClassExtends = 1024,
-        HasDecorators = 2048,
-        HasParamDecorators = 4096,
-        HasAsyncFunctions = 8192,
-        HasJsxSpreadAttributes = 16384,
-        DisallowInContext = 32768,
-        YieldContext = 65536,
-        DecoratorContext = 131072,
-        AwaitContext = 262144,
-        ThisNodeHasError = 524288,
-        JavaScriptFile = 1048576,
-        ThisNodeOrAnySubNodesHasError = 2097152,
-        HasAggregatedChildData = 4194304,
+        HasAsyncFunctions = 1024,
+        DisallowInContext = 2048,
+        YieldContext = 4096,
+        DecoratorContext = 8192,
+        AwaitContext = 16384,
+        ThisNodeHasError = 32768,
+        JavaScriptFile = 65536,
+        ThisNodeOrAnySubNodesHasError = 131072,
+        HasAggregatedChildData = 262144,
+        PossiblyContainsDynamicImport = 524288,
         BlockScoped = 3,
         ReachabilityCheckFlags = 384,
-        EmitHelperFlags = 31744,
-        ReachabilityAndEmitFlags = 32128,
-        ContextFlags = 1540096,
-        TypeExcludesFlags = 327680,
+        ReachabilityAndEmitFlags = 1408,
+        ContextFlags = 96256,
+        TypeExcludesFlags = 20480,
     }
-    type ModifiersArray = NodeArray<Modifier>;
     enum ModifierFlags {
         None = 0,
         Export = 1,
@@ -392,6 +424,8 @@ declare namespace ts {
         AccessibilityModifier = 28,
         ParameterPropertyModifier = 92,
         NonPublicAccessibilityModifier = 24,
+        TypeScriptModifier = 2270,
+        ExportDefault = 513,
     }
     enum JsxFlags {
         None = 0,
@@ -417,22 +451,36 @@ declare namespace ts {
         parent?: Node;
         original?: Node;
         startsOnNewLine?: boolean;
-        jsDocComments?: JSDoc[];
+        jsDoc?: JSDoc[];
+        jsDocCache?: (JSDoc | JSDocTag)[];
         symbol?: Symbol;
         locals?: SymbolTable;
         nextContainer?: Node;
         localSymbol?: Symbol;
         flowNode?: FlowNode;
         emitNode?: EmitNode;
+        contextualType?: Type;
+        contextualMapper?: TypeMapper;
     }
     interface NodeArray<T extends Node> extends Array<T>, TextRange {
         hasTrailingComma?: boolean;
+        transformFlags?: TransformFlags;
     }
-    interface Token extends Node {
-        __tokenTag: any;
-    }
-    interface Modifier extends Token {
-    }
+    interface Token<TKind extends SyntaxKind> extends Node {
+        kind: TKind;
+    }
+    type DotDotDotToken = Token<SyntaxKind.DotDotDotToken>;
+    type QuestionToken = Token<SyntaxKind.QuestionToken>;
+    type ColonToken = Token<SyntaxKind.ColonToken>;
+    type EqualsToken = Token<SyntaxKind.EqualsToken>;
+    type AsteriskToken = Token<SyntaxKind.AsteriskToken>;
+    type EqualsGreaterThanToken = Token<SyntaxKind.EqualsGreaterThanToken>;
+    type EndOfFileToken = Token<SyntaxKind.EndOfFileToken>;
+    type AtToken = Token<SyntaxKind.AtToken>;
+    type ReadonlyToken = Token<SyntaxKind.ReadonlyKeyword>;
+    type AwaitKeywordToken = Token<SyntaxKind.AwaitKeyword>;
+    type Modifier = Token<SyntaxKind.AbstractKeyword> | Token<SyntaxKind.AsyncKeyword> | Token<SyntaxKind.ConstKeyword> | Token<SyntaxKind.DeclareKeyword> | Token<SyntaxKind.DefaultKeyword> | Token<SyntaxKind.ExportKeyword> | Token<SyntaxKind.PublicKeyword> | Token<SyntaxKind.PrivateKeyword> | Token<SyntaxKind.ProtectedKeyword> | Token<SyntaxKind.ReadonlyKeyword> | Token<SyntaxKind.StaticKeyword>;
+    type ModifiersArray = NodeArray<Modifier>;
     enum GeneratedIdentifierKind {
         None = 0,
         Auto = 1,
@@ -441,122 +489,158 @@ declare namespace ts {
         Node = 4,
     }
     interface Identifier extends PrimaryExpression {
+        kind: SyntaxKind.Identifier;
+        /**
+         * Text of identifier (with escapes converted to characters).
+         * If the identifier begins with two underscores, this will begin with three.
+         */
         text: string;
         originalKeywordKind?: SyntaxKind;
         autoGenerateKind?: GeneratedIdentifierKind;
         autoGenerateId?: number;
+        isInJSDocNamespace?: boolean;
+        typeArguments?: NodeArray<TypeNode>;
     }
     interface TransientIdentifier extends Identifier {
         resolvedSymbol: Symbol;
     }
+    interface GeneratedIdentifier extends Identifier {
+        autoGenerateKind: GeneratedIdentifierKind.Auto | GeneratedIdentifierKind.Loop | GeneratedIdentifierKind.Unique | GeneratedIdentifierKind.Node;
+    }
     interface QualifiedName extends Node {
+        kind: SyntaxKind.QualifiedName;
         left: EntityName;
         right: Identifier;
     }
     type EntityName = Identifier | QualifiedName;
-    type PropertyName = Identifier | LiteralExpression | ComputedPropertyName;
-    type DeclarationName = Identifier | LiteralExpression | ComputedPropertyName | BindingPattern;
+    type PropertyName = Identifier | StringLiteral | NumericLiteral | ComputedPropertyName;
+    type DeclarationName = Identifier | StringLiteral | NumericLiteral | ComputedPropertyName | BindingPattern;
     interface Declaration extends Node {
         _declarationBrand: any;
+    }
+    interface NamedDeclaration extends Declaration {
         name?: DeclarationName;
     }
-    interface DeclarationStatement extends Declaration, Statement {
-        name?: Identifier;
+    interface DeclarationStatement extends NamedDeclaration, Statement {
+        name?: Identifier | StringLiteral | NumericLiteral;
     }
     interface ComputedPropertyName extends Node {
+        kind: SyntaxKind.ComputedPropertyName;
         expression: Expression;
     }
     interface Decorator extends Node {
+        kind: SyntaxKind.Decorator;
         expression: LeftHandSideExpression;
     }
-    interface TypeParameterDeclaration extends Declaration {
+    interface TypeParameterDeclaration extends NamedDeclaration {
+        kind: SyntaxKind.TypeParameter;
+        parent?: DeclarationWithTypeParameters;
         name: Identifier;
         constraint?: TypeNode;
+        default?: TypeNode;
         expression?: Expression;
     }
-    interface SignatureDeclaration extends Declaration {
+    interface SignatureDeclaration extends NamedDeclaration {
         name?: PropertyName;
         typeParameters?: NodeArray<TypeParameterDeclaration>;
         parameters: NodeArray<ParameterDeclaration>;
         type?: TypeNode;
     }
     interface CallSignatureDeclaration extends SignatureDeclaration, TypeElement {
+        kind: SyntaxKind.CallSignature;
     }
     interface ConstructSignatureDeclaration extends SignatureDeclaration, TypeElement {
+        kind: SyntaxKind.ConstructSignature;
     }
     type BindingName = Identifier | BindingPattern;
-    interface VariableDeclaration extends Declaration {
-        parent?: VariableDeclarationList;
+    interface VariableDeclaration extends NamedDeclaration {
+        kind: SyntaxKind.VariableDeclaration;
+        parent?: VariableDeclarationList | CatchClause;
         name: BindingName;
         type?: TypeNode;
         initializer?: Expression;
     }
     interface VariableDeclarationList extends Node {
+        kind: SyntaxKind.VariableDeclarationList;
+        parent?: VariableStatement | ForStatement | ForOfStatement | ForInStatement;
         declarations: NodeArray<VariableDeclaration>;
     }
-    interface ParameterDeclaration extends Declaration {
-        dotDotDotToken?: Node;
+    interface ParameterDeclaration extends NamedDeclaration {
+        kind: SyntaxKind.Parameter;
+        parent?: SignatureDeclaration;
+        dotDotDotToken?: DotDotDotToken;
         name: BindingName;
-        questionToken?: Node;
+        questionToken?: QuestionToken;
         type?: TypeNode;
         initializer?: Expression;
     }
-    interface BindingElement extends Declaration {
+    interface BindingElement extends NamedDeclaration {
+        kind: SyntaxKind.BindingElement;
+        parent?: BindingPattern;
         propertyName?: PropertyName;
-        dotDotDotToken?: Node;
+        dotDotDotToken?: DotDotDotToken;
         name: BindingName;
         initializer?: Expression;
     }
     interface PropertySignature extends TypeElement {
+        kind: SyntaxKind.PropertySignature | SyntaxKind.JSDocRecordMember;
         name: PropertyName;
-        questionToken?: Node;
+        questionToken?: QuestionToken;
         type?: TypeNode;
         initializer?: Expression;
     }
     interface PropertyDeclaration extends ClassElement {
-        questionToken?: Node;
+        kind: SyntaxKind.PropertyDeclaration;
+        questionToken?: QuestionToken;
         name: PropertyName;
         type?: TypeNode;
         initializer?: Expression;
     }
-    interface ObjectLiteralElement extends Declaration {
+    interface ObjectLiteralElement extends NamedDeclaration {
         _objectLiteralBrandBrand: any;
         name?: PropertyName;
     }
-    type ObjectLiteralElementLike = PropertyAssignment | ShorthandPropertyAssignment | MethodDeclaration | AccessorDeclaration;
+    type ObjectLiteralElementLike = PropertyAssignment | ShorthandPropertyAssignment | SpreadAssignment | MethodDeclaration | AccessorDeclaration;
     interface PropertyAssignment extends ObjectLiteralElement {
-        _propertyAssignmentBrand: any;
+        kind: SyntaxKind.PropertyAssignment;
         name: PropertyName;
-        questionToken?: Node;
+        questionToken?: QuestionToken;
         initializer: Expression;
     }
     interface ShorthandPropertyAssignment extends ObjectLiteralElement {
+        kind: SyntaxKind.ShorthandPropertyAssignment;
         name: Identifier;
-        questionToken?: Node;
-        equalsToken?: Node;
+        questionToken?: QuestionToken;
+        equalsToken?: Token<SyntaxKind.EqualsToken>;
         objectAssignmentInitializer?: Expression;
     }
-    interface VariableLikeDeclaration extends Declaration {
+    interface SpreadAssignment extends ObjectLiteralElement {
+        kind: SyntaxKind.SpreadAssignment;
+        expression: Expression;
+    }
+    interface VariableLikeDeclaration extends NamedDeclaration {
         propertyName?: PropertyName;
-        dotDotDotToken?: Node;
+        dotDotDotToken?: DotDotDotToken;
         name: DeclarationName;
-        questionToken?: Node;
+        questionToken?: QuestionToken;
         type?: TypeNode;
         initializer?: Expression;
     }
-    interface PropertyLikeDeclaration extends Declaration {
+    interface PropertyLikeDeclaration extends NamedDeclaration {
         name: PropertyName;
     }
-    interface BindingPattern extends Node {
-        elements: NodeArray<BindingElement | ArrayBindingElement>;
-    }
-    interface ObjectBindingPattern extends BindingPattern {
+    interface ObjectBindingPattern extends Node {
+        kind: SyntaxKind.ObjectBindingPattern;
+        parent?: VariableDeclaration | ParameterDeclaration | BindingElement;
         elements: NodeArray<BindingElement>;
     }
-    type ArrayBindingElement = BindingElement | OmittedExpression;
-    interface ArrayBindingPattern extends BindingPattern {
+    interface ArrayBindingPattern extends Node {
+        kind: SyntaxKind.ArrayBindingPattern;
+        parent?: VariableDeclaration | ParameterDeclaration | BindingElement;
         elements: NodeArray<ArrayBindingElement>;
     }
+    type BindingPattern = ObjectBindingPattern | ArrayBindingPattern;
+    type ArrayBindingElement = BindingElement | OmittedExpression;
     /**
      * Several node kinds share function-like features such as a signature,
      * a name, and a body. These nodes should extend FunctionLikeDeclaration.
@@ -567,118 +651,164 @@ declare namespace ts {
      */
     interface FunctionLikeDeclaration extends SignatureDeclaration {
         _functionLikeDeclarationBrand: any;
-        asteriskToken?: Node;
-        questionToken?: Node;
+        asteriskToken?: AsteriskToken;
+        questionToken?: QuestionToken;
         body?: Block | Expression;
     }
     interface FunctionDeclaration extends FunctionLikeDeclaration, DeclarationStatement {
+        kind: SyntaxKind.FunctionDeclaration;
         name?: Identifier;
         body?: FunctionBody;
     }
     interface MethodSignature extends SignatureDeclaration, TypeElement {
+        kind: SyntaxKind.MethodSignature;
         name: PropertyName;
     }
     interface MethodDeclaration extends FunctionLikeDeclaration, ClassElement, ObjectLiteralElement {
+        kind: SyntaxKind.MethodDeclaration;
         name: PropertyName;
         body?: FunctionBody;
     }
     interface ConstructorDeclaration extends FunctionLikeDeclaration, ClassElement {
+        kind: SyntaxKind.Constructor;
+        parent?: ClassDeclaration | ClassExpression;
         body?: FunctionBody;
     }
+    /** For when we encounter a semicolon in a class declaration. ES6 allows these as class elements. */
     interface SemicolonClassElement extends ClassElement {
-        _semicolonClassElementBrand: any;
+        kind: SyntaxKind.SemicolonClassElement;
+        parent?: ClassDeclaration | ClassExpression;
     }
-    interface AccessorDeclaration extends FunctionLikeDeclaration, ClassElement, ObjectLiteralElement {
-        _accessorDeclarationBrand: any;
+    interface GetAccessorDeclaration extends FunctionLikeDeclaration, ClassElement, ObjectLiteralElement {
+        kind: SyntaxKind.GetAccessor;
+        parent?: ClassDeclaration | ClassExpression | ObjectLiteralExpression;
         name: PropertyName;
         body: FunctionBody;
     }
-    interface GetAccessorDeclaration extends AccessorDeclaration {
-    }
-    interface SetAccessorDeclaration extends AccessorDeclaration {
+    interface SetAccessorDeclaration extends FunctionLikeDeclaration, ClassElement, ObjectLiteralElement {
+        kind: SyntaxKind.SetAccessor;
+        parent?: ClassDeclaration | ClassExpression | ObjectLiteralExpression;
+        name: PropertyName;
+        body: FunctionBody;
     }
+    type AccessorDeclaration = GetAccessorDeclaration | SetAccessorDeclaration;
     interface IndexSignatureDeclaration extends SignatureDeclaration, ClassElement, TypeElement {
-        _indexSignatureDeclarationBrand: any;
+        kind: SyntaxKind.IndexSignature;
+        parent?: ClassDeclaration | ClassExpression | InterfaceDeclaration | TypeLiteralNode;
     }
     interface TypeNode extends Node {
         _typeNodeBrand: any;
     }
-    interface ThisTypeNode extends TypeNode {
-        _thisTypeNodeBrand: any;
+    interface KeywordTypeNode extends TypeNode {
+        kind: SyntaxKind.AnyKeyword | SyntaxKind.NumberKeyword | SyntaxKind.ObjectKeyword | SyntaxKind.BooleanKeyword | SyntaxKind.StringKeyword | SyntaxKind.SymbolKeyword | SyntaxKind.ThisKeyword | SyntaxKind.VoidKeyword | SyntaxKind.UndefinedKeyword | SyntaxKind.NullKeyword | SyntaxKind.NeverKeyword;
     }
-    interface FunctionOrConstructorTypeNode extends TypeNode, SignatureDeclaration {
-        _functionOrConstructorTypeNodeBrand: any;
+    interface ThisTypeNode extends TypeNode {
+        kind: SyntaxKind.ThisType;
     }
-    interface FunctionTypeNode extends FunctionOrConstructorTypeNode {
+    type FunctionOrConstructorTypeNode = FunctionTypeNode | ConstructorTypeNode;
+    interface FunctionTypeNode extends TypeNode, SignatureDeclaration {
+        kind: SyntaxKind.FunctionType;
     }
-    interface ConstructorTypeNode extends FunctionOrConstructorTypeNode {
+    interface ConstructorTypeNode extends TypeNode, SignatureDeclaration {
+        kind: SyntaxKind.ConstructorType;
     }
+    type TypeReferenceType = TypeReferenceNode | ExpressionWithTypeArguments | JSDocTypeReference;
     interface TypeReferenceNode extends TypeNode {
+        kind: SyntaxKind.TypeReference;
         typeName: EntityName;
         typeArguments?: NodeArray<TypeNode>;
     }
     interface TypePredicateNode extends TypeNode {
+        kind: SyntaxKind.TypePredicate;
         parameterName: Identifier | ThisTypeNode;
         type: TypeNode;
     }
     interface TypeQueryNode extends TypeNode {
+        kind: SyntaxKind.TypeQuery;
         exprName: EntityName;
     }
     interface TypeLiteralNode extends TypeNode, Declaration {
+        kind: SyntaxKind.TypeLiteral;
         members: NodeArray<TypeElement>;
     }
     interface ArrayTypeNode extends TypeNode {
+        kind: SyntaxKind.ArrayType;
         elementType: TypeNode;
     }
     interface TupleTypeNode extends TypeNode {
+        kind: SyntaxKind.TupleType;
         elementTypes: NodeArray<TypeNode>;
     }
-    interface UnionOrIntersectionTypeNode extends TypeNode {
+    type UnionOrIntersectionTypeNode = UnionTypeNode | IntersectionTypeNode;
+    interface UnionTypeNode extends TypeNode {
+        kind: SyntaxKind.UnionType;
         types: NodeArray<TypeNode>;
     }
-    interface UnionTypeNode extends UnionOrIntersectionTypeNode {
-    }
-    interface IntersectionTypeNode extends UnionOrIntersectionTypeNode {
+    interface IntersectionTypeNode extends TypeNode {
+        kind: SyntaxKind.IntersectionType;
+        types: NodeArray<TypeNode>;
     }
     interface ParenthesizedTypeNode extends TypeNode {
+        kind: SyntaxKind.ParenthesizedType;
         type: TypeNode;
     }
+    interface TypeOperatorNode extends TypeNode {
+        kind: SyntaxKind.TypeOperator;
+        operator: SyntaxKind.KeyOfKeyword;
+        type: TypeNode;
+    }
+    interface IndexedAccessTypeNode extends TypeNode {
+        kind: SyntaxKind.IndexedAccessType;
+        objectType: TypeNode;
+        indexType: TypeNode;
+    }
+    interface MappedTypeNode extends TypeNode, Declaration {
+        kind: SyntaxKind.MappedType;
+        parent?: TypeAliasDeclaration;
+        readonlyToken?: ReadonlyToken;
+        typeParameter: TypeParameterDeclaration;
+        questionToken?: QuestionToken;
+        type?: TypeNode;
+    }
     interface LiteralTypeNode extends TypeNode {
-        _stringLiteralTypeBrand: any;
+        kind: SyntaxKind.LiteralType;
         literal: Expression;
     }
     interface StringLiteral extends LiteralExpression {
-        _stringLiteralBrand: any;
-        textSourceNode?: Identifier | StringLiteral;
+        kind: SyntaxKind.StringLiteral;
+        textSourceNode?: Identifier | StringLiteral | NumericLiteral;
     }
     interface Expression extends Node {
         _expressionBrand: any;
-        contextualType?: Type;
     }
     interface OmittedExpression extends Expression {
-        _omittedExpressionBrand: any;
+        kind: SyntaxKind.OmittedExpression;
     }
     interface PartiallyEmittedExpression extends LeftHandSideExpression {
+        kind: SyntaxKind.PartiallyEmittedExpression;
         expression: Expression;
     }
     interface UnaryExpression extends Expression {
         _unaryExpressionBrand: any;
     }
-    interface IncrementExpression extends UnaryExpression {
-        _incrementExpressionBrand: any;
+    /** Deprecated, please use UpdateExpression */
+    type IncrementExpression = UpdateExpression;
+    interface UpdateExpression extends UnaryExpression {
+        _updateExpressionBrand: any;
     }
-    interface PrefixUnaryExpression extends IncrementExpression {
-        operator: SyntaxKind;
+    type PrefixUnaryOperator = SyntaxKind.PlusPlusToken | SyntaxKind.MinusMinusToken | SyntaxKind.PlusToken | SyntaxKind.MinusToken | SyntaxKind.TildeToken | SyntaxKind.ExclamationToken;
+    interface PrefixUnaryExpression extends UpdateExpression {
+        kind: SyntaxKind.PrefixUnaryExpression;
+        operator: PrefixUnaryOperator;
         operand: UnaryExpression;
     }
-    interface PostfixUnaryExpression extends IncrementExpression {
+    type PostfixUnaryOperator = SyntaxKind.PlusPlusToken | SyntaxKind.MinusMinusToken;
+    interface PostfixUnaryExpression extends UpdateExpression {
+        kind: SyntaxKind.PostfixUnaryExpression;
         operand: LeftHandSideExpression;
-        operator: SyntaxKind;
-    }
-    interface PostfixExpression extends UnaryExpression {
-        _postfixExpressionBrand: any;
+        operator: PostfixUnaryOperator;
     }
-    interface LeftHandSideExpression extends IncrementExpression {
+    interface LeftHandSideExpression extends UpdateExpression {
         _leftHandSideExpressionBrand: any;
     }
     interface MemberExpression extends LeftHandSideExpression {
@@ -687,191 +817,363 @@ declare namespace ts {
     interface PrimaryExpression extends MemberExpression {
         _primaryExpressionBrand: any;
     }
+    interface NullLiteral extends PrimaryExpression, TypeNode {
+        kind: SyntaxKind.NullKeyword;
+    }
+    interface BooleanLiteral extends PrimaryExpression, TypeNode {
+        kind: SyntaxKind.TrueKeyword | SyntaxKind.FalseKeyword;
+    }
+    interface ThisExpression extends PrimaryExpression, KeywordTypeNode {
+        kind: SyntaxKind.ThisKeyword;
+    }
+    interface SuperExpression extends PrimaryExpression {
+        kind: SyntaxKind.SuperKeyword;
+    }
+    interface ImportExpression extends PrimaryExpression {
+        kind: SyntaxKind.ImportKeyword;
+    }
     interface DeleteExpression extends UnaryExpression {
+        kind: SyntaxKind.DeleteExpression;
         expression: UnaryExpression;
     }
     interface TypeOfExpression extends UnaryExpression {
+        kind: SyntaxKind.TypeOfExpression;
         expression: UnaryExpression;
     }
     interface VoidExpression extends UnaryExpression {
+        kind: SyntaxKind.VoidExpression;
         expression: UnaryExpression;
     }
     interface AwaitExpression extends UnaryExpression {
+        kind: SyntaxKind.AwaitExpression;
         expression: UnaryExpression;
     }
     interface YieldExpression extends Expression {
-        asteriskToken?: Node;
+        kind: SyntaxKind.YieldExpression;
+        asteriskToken?: AsteriskToken;
         expression?: Expression;
     }
+    type ExponentiationOperator = SyntaxKind.AsteriskAsteriskToken;
+    type MultiplicativeOperator = SyntaxKind.AsteriskToken | SyntaxKind.SlashToken | SyntaxKind.PercentToken;
+    type MultiplicativeOperatorOrHigher = ExponentiationOperator | MultiplicativeOperator;
+    type AdditiveOperator = SyntaxKind.PlusToken | SyntaxKind.MinusToken;
+    type AdditiveOperatorOrHigher = MultiplicativeOperatorOrHigher | AdditiveOperator;
+    type ShiftOperator = SyntaxKind.LessThanLessThanToken | SyntaxKind.GreaterThanGreaterThanToken | SyntaxKind.GreaterThanGreaterThanGreaterThanToken;
+    type ShiftOperatorOrHigher = AdditiveOperatorOrHigher | ShiftOperator;
+    type RelationalOperator = SyntaxKind.LessThanToken | SyntaxKind.LessThanEqualsToken | SyntaxKind.GreaterThanToken | SyntaxKind.GreaterThanEqualsToken | SyntaxKind.InstanceOfKeyword | SyntaxKind.InKeyword;
+    type RelationalOperatorOrHigher = ShiftOperatorOrHigher | RelationalOperator;
+    type EqualityOperator = SyntaxKind.EqualsEqualsToken | SyntaxKind.EqualsEqualsEqualsToken | SyntaxKind.ExclamationEqualsEqualsToken | SyntaxKind.ExclamationEqualsToken;
+    type EqualityOperatorOrHigher = RelationalOperatorOrHigher | EqualityOperator;
+    type BitwiseOperator = SyntaxKind.AmpersandToken | SyntaxKind.BarToken | SyntaxKind.CaretToken;
+    type BitwiseOperatorOrHigher = EqualityOperatorOrHigher | BitwiseOperator;
+    type LogicalOperator = SyntaxKind.AmpersandAmpersandToken | SyntaxKind.BarBarToken;
+    type LogicalOperatorOrHigher = BitwiseOperatorOrHigher | LogicalOperator;
+    type CompoundAssignmentOperator = SyntaxKind.PlusEqualsToken | SyntaxKind.MinusEqualsToken | SyntaxKind.AsteriskAsteriskEqualsToken | SyntaxKind.AsteriskEqualsToken | SyntaxKind.SlashEqualsToken | SyntaxKind.PercentEqualsToken | SyntaxKind.AmpersandEqualsToken | SyntaxKind.BarEqualsToken | SyntaxKind.CaretEqualsToken | SyntaxKind.LessThanLessThanEqualsToken | SyntaxKind.GreaterThanGreaterThanGreaterThanEqualsToken | SyntaxKind.GreaterThanGreaterThanEqualsToken;
+    type AssignmentOperator = SyntaxKind.EqualsToken | CompoundAssignmentOperator;
+    type AssignmentOperatorOrHigher = LogicalOperatorOrHigher | AssignmentOperator;
+    type BinaryOperator = AssignmentOperatorOrHigher | SyntaxKind.CommaToken;
+    type BinaryOperatorToken = Token<BinaryOperator>;
     interface BinaryExpression extends Expression, Declaration {
+        kind: SyntaxKind.BinaryExpression;
         left: Expression;
-        operatorToken: Node;
+        operatorToken: BinaryOperatorToken;
         right: Expression;
     }
+    type AssignmentOperatorToken = Token<AssignmentOperator>;
+    interface AssignmentExpression<TOperator extends AssignmentOperatorToken> extends BinaryExpression {
+        left: LeftHandSideExpression;
+        operatorToken: TOperator;
+    }
+    interface ObjectDestructuringAssignment extends AssignmentExpression<EqualsToken> {
+        left: ObjectLiteralExpression;
+    }
+    interface ArrayDestructuringAssignment extends AssignmentExpression<EqualsToken> {
+        left: ArrayLiteralExpression;
+    }
+    type DestructuringAssignment = ObjectDestructuringAssignment | ArrayDestructuringAssignment;
+    type BindingOrAssignmentElement = VariableDeclaration | ParameterDeclaration | BindingElement | PropertyAssignment | ShorthandPropertyAssignment | SpreadAssignment | OmittedExpression | SpreadElement | ArrayLiteralExpression | ObjectLiteralExpression | AssignmentExpression<EqualsToken> | Identifier | PropertyAccessExpression | ElementAccessExpression;
+    type BindingOrAssignmentElementRestIndicator = DotDotDotToken | SpreadElement | SpreadAssignment;
+    type BindingOrAssignmentElementTarget = BindingOrAssignmentPattern | Expression;
+    type ObjectBindingOrAssignmentPattern = ObjectBindingPattern | ObjectLiteralExpression;
+    type ArrayBindingOrAssignmentPattern = ArrayBindingPattern | ArrayLiteralExpression;
+    type AssignmentPattern = ObjectLiteralExpression | ArrayLiteralExpression;
+    type BindingOrAssignmentPattern = ObjectBindingOrAssignmentPattern | ArrayBindingOrAssignmentPattern;
     interface ConditionalExpression extends Expression {
+        kind: SyntaxKind.ConditionalExpression;
         condition: Expression;
-        questionToken: Node;
+        questionToken: QuestionToken;
         whenTrue: Expression;
-        colonToken: Node;
+        colonToken: ColonToken;
         whenFalse: Expression;
     }
     type FunctionBody = Block;
     type ConciseBody = FunctionBody | Expression;
     interface FunctionExpression extends PrimaryExpression, FunctionLikeDeclaration {
+        kind: SyntaxKind.FunctionExpression;
         name?: Identifier;
         body: FunctionBody;
     }
     interface ArrowFunction extends Expression, FunctionLikeDeclaration {
-        equalsGreaterThanToken: Node;
+        kind: SyntaxKind.ArrowFunction;
+        equalsGreaterThanToken: EqualsGreaterThanToken;
         body: ConciseBody;
     }
     interface LiteralLikeNode extends Node {
         text: string;
         isUnterminated?: boolean;
         hasExtendedUnicodeEscape?: boolean;
-        isOctalLiteral?: boolean;
     }
     interface LiteralExpression extends LiteralLikeNode, PrimaryExpression {
         _literalExpressionBrand: any;
     }
+    interface RegularExpressionLiteral extends LiteralExpression {
+        kind: SyntaxKind.RegularExpressionLiteral;
+    }
+    interface NoSubstitutionTemplateLiteral extends LiteralExpression {
+        kind: SyntaxKind.NoSubstitutionTemplateLiteral;
+    }
+    enum NumericLiteralFlags {
+        None = 0,
+        Scientific = 2,
+        Octal = 4,
+        HexSpecifier = 8,
+        BinarySpecifier = 16,
+        OctalSpecifier = 32,
+        BinaryOrOctalSpecifier = 48,
+    }
     interface NumericLiteral extends LiteralExpression {
-        _numericLiteralBrand: any;
-        trailingComment?: string;
+        kind: SyntaxKind.NumericLiteral;
+        numericLiteralFlags?: NumericLiteralFlags;
+    }
+    interface TemplateHead extends LiteralLikeNode {
+        kind: SyntaxKind.TemplateHead;
+        parent?: TemplateExpression;
     }
-    interface TemplateLiteralFragment extends LiteralLikeNode {
-        _templateLiteralFragmentBrand: any;
+    interface TemplateMiddle extends LiteralLikeNode {
+        kind: SyntaxKind.TemplateMiddle;
+        parent?: TemplateSpan;
     }
-    type Template = TemplateExpression | LiteralExpression;
+    interface TemplateTail extends LiteralLikeNode {
+        kind: SyntaxKind.TemplateTail;
+        parent?: TemplateSpan;
+    }
+    type TemplateLiteral = TemplateExpression | NoSubstitutionTemplateLiteral;
     interface TemplateExpression extends PrimaryExpression {
-        head: TemplateLiteralFragment;
+        kind: SyntaxKind.TemplateExpression;
+        head: TemplateHead;
         templateSpans: NodeArray<TemplateSpan>;
     }
     interface TemplateSpan extends Node {
+        kind: SyntaxKind.TemplateSpan;
+        parent?: TemplateExpression;
         expression: Expression;
-        literal: TemplateLiteralFragment;
+        literal: TemplateMiddle | TemplateTail;
     }
     interface ParenthesizedExpression extends PrimaryExpression {
+        kind: SyntaxKind.ParenthesizedExpression;
         expression: Expression;
     }
     interface ArrayLiteralExpression extends PrimaryExpression {
+        kind: SyntaxKind.ArrayLiteralExpression;
         elements: NodeArray<Expression>;
         multiLine?: boolean;
     }
-    interface SpreadElementExpression extends Expression {
+    interface SpreadElement extends Expression {
+        kind: SyntaxKind.SpreadElement;
         expression: Expression;
     }
     /**
-      * This interface is a base interface for ObjectLiteralExpression and JSXAttributes to extend from. JSXAttributes is similar to
-      * ObjectLiteralExpression in that it contains array of properties; however, JSXAttributes' properties can only be
-      * JSXAttribute or JSXSpreadAttribute. ObjectLiteralExpression, on the other hand, can only have properties of type
-      * ObjectLiteralElement (e.g. PropertyAssignment, ShorthandPropertyAssignment etc.)
-     **/
+     * This interface is a base interface for ObjectLiteralExpression and JSXAttributes to extend from. JSXAttributes is similar to
+     * ObjectLiteralExpression in that it contains array of properties; however, JSXAttributes' properties can only be
+     * JSXAttribute or JSXSpreadAttribute. ObjectLiteralExpression, on the other hand, can only have properties of type
+     * ObjectLiteralElement (e.g. PropertyAssignment, ShorthandPropertyAssignment etc.)
+     */
     interface ObjectLiteralExpressionBase<T extends ObjectLiteralElement> extends PrimaryExpression, Declaration {
         properties: NodeArray<T>;
     }
     interface ObjectLiteralExpression extends ObjectLiteralExpressionBase<ObjectLiteralElementLike> {
+        kind: SyntaxKind.ObjectLiteralExpression;
         multiLine?: boolean;
     }
-    type EntityNameExpression = Identifier | PropertyAccessEntityNameExpression;
+    type EntityNameExpression = Identifier | PropertyAccessEntityNameExpression | ParenthesizedExpression;
     type EntityNameOrEntityNameExpression = EntityName | EntityNameExpression;
-    interface PropertyAccessExpression extends MemberExpression, Declaration {
+    interface PropertyAccessExpression extends MemberExpression, NamedDeclaration {
+        kind: SyntaxKind.PropertyAccessExpression;
         expression: LeftHandSideExpression;
         name: Identifier;
     }
+    interface SuperPropertyAccessExpression extends PropertyAccessExpression {
+        expression: SuperExpression;
+    }
     /** Brand for a PropertyAccessExpression which, like a QualifiedName, consists of a sequence of identifiers separated by dots. */
     interface PropertyAccessEntityNameExpression extends PropertyAccessExpression {
         _propertyAccessExpressionLikeQualifiedNameBrand?: any;
         expression: EntityNameExpression;
     }
     interface ElementAccessExpression extends MemberExpression {
+        kind: SyntaxKind.ElementAccessExpression;
         expression: LeftHandSideExpression;
         argumentExpression?: Expression;
     }
+    interface SuperElementAccessExpression extends ElementAccessExpression {
+        expression: SuperExpression;
+    }
+    type SuperProperty = SuperPropertyAccessExpression | SuperElementAccessExpression;
     interface CallExpression extends LeftHandSideExpression, Declaration {
+        kind: SyntaxKind.CallExpression;
         expression: LeftHandSideExpression;
         typeArguments?: NodeArray<TypeNode>;
         arguments: NodeArray<Expression>;
     }
+    interface SuperCall extends CallExpression {
+        expression: SuperExpression;
+    }
+    interface ImportCall extends CallExpression {
+        expression: ImportExpression;
+    }
     interface ExpressionWithTypeArguments extends TypeNode {
+        kind: SyntaxKind.ExpressionWithTypeArguments;
+        parent?: HeritageClause;
         expression: LeftHandSideExpression;
         typeArguments?: NodeArray<TypeNode>;
     }
-    interface NewExpression extends CallExpression, PrimaryExpression {
+    interface NewExpression extends PrimaryExpression, Declaration {
+        kind: SyntaxKind.NewExpression;
+        expression: LeftHandSideExpression;
+        typeArguments?: NodeArray<TypeNode>;
+        arguments?: NodeArray<Expression>;
     }
     interface TaggedTemplateExpression extends MemberExpression {
+        kind: SyntaxKind.TaggedTemplateExpression;
         tag: LeftHandSideExpression;
-        template: Template;
+        template: TemplateLiteral;
     }
-    type CallLikeExpression = CallExpression | NewExpression | TaggedTemplateExpression | Decorator;
+    type CallLikeExpression = CallExpression | NewExpression | TaggedTemplateExpression | Decorator | JsxOpeningLikeElement;
     interface AsExpression extends Expression {
+        kind: SyntaxKind.AsExpression;
         expression: Expression;
         type: TypeNode;
     }
     interface TypeAssertion extends UnaryExpression {
+        kind: SyntaxKind.TypeAssertionExpression;
         type: TypeNode;
         expression: UnaryExpression;
     }
     type AssertionExpression = TypeAssertion | AsExpression;
     interface NonNullExpression extends LeftHandSideExpression {
+        kind: SyntaxKind.NonNullExpression;
         expression: Expression;
     }
+    interface MetaProperty extends PrimaryExpression {
+        kind: SyntaxKind.MetaProperty;
+        keywordToken: SyntaxKind.NewKeyword;
+        name: Identifier;
+    }
     interface JsxElement extends PrimaryExpression {
+        kind: SyntaxKind.JsxElement;
         openingElement: JsxOpeningElement;
         children: NodeArray<JsxChild>;
         closingElement: JsxClosingElement;
     }
+    type JsxOpeningLikeElement = JsxSelfClosingElement | JsxOpeningElement;
+    type JsxAttributeLike = JsxAttribute | JsxSpreadAttribute;
     type JsxTagNameExpression = PrimaryExpression | PropertyAccessExpression;
+    interface JsxAttributes extends ObjectLiteralExpressionBase<JsxAttributeLike> {
+        parent?: JsxOpeningLikeElement;
+    }
     interface JsxOpeningElement extends Expression {
-        _openingElementBrand?: any;
+        kind: SyntaxKind.JsxOpeningElement;
+        parent?: JsxElement;
         tagName: JsxTagNameExpression;
-        attributes: NodeArray<JsxAttribute | JsxSpreadAttribute>;
+        attributes: JsxAttributes;
     }
-    interface JsxSelfClosingElement extends PrimaryExpression, JsxOpeningElement {
-        _selfClosingElementBrand?: any;
+    interface JsxSelfClosingElement extends PrimaryExpression {
+        kind: SyntaxKind.JsxSelfClosingElement;
+        tagName: JsxTagNameExpression;
+        attributes: JsxAttributes;
     }
-    type JsxOpeningLikeElement = JsxSelfClosingElement | JsxOpeningElement;
-    type JsxAttributeLike = JsxAttribute | JsxSpreadAttribute;
-    interface JsxAttribute extends Node {
+    interface JsxAttribute extends ObjectLiteralElement {
+        kind: SyntaxKind.JsxAttribute;
+        parent?: JsxAttributes;
         name: Identifier;
         initializer?: StringLiteral | JsxExpression;
     }
-    interface JsxSpreadAttribute extends Node {
+    interface JsxSpreadAttribute extends ObjectLiteralElement {
+        kind: SyntaxKind.JsxSpreadAttribute;
+        parent?: JsxAttributes;
         expression: Expression;
     }
     interface JsxClosingElement extends Node {
+        kind: SyntaxKind.JsxClosingElement;
+        parent?: JsxElement;
         tagName: JsxTagNameExpression;
     }
     interface JsxExpression extends Expression {
+        kind: SyntaxKind.JsxExpression;
+        parent?: JsxElement | JsxAttributeLike;
+        dotDotDotToken?: Token<SyntaxKind.DotDotDotToken>;
         expression?: Expression;
     }
     interface JsxText extends Node {
-        _jsxTextExpressionBrand: any;
+        kind: SyntaxKind.JsxText;
+        containsOnlyWhiteSpaces: boolean;
+        parent?: JsxElement;
     }
     type JsxChild = JsxText | JsxExpression | JsxElement | JsxSelfClosingElement;
     interface Statement extends Node {
         _statementBrand: any;
     }
     interface NotEmittedStatement extends Statement {
+        kind: SyntaxKind.NotEmittedStatement;
+    }
+    /**
+     * Marks the end of transformed declaration to properly emit exports.
+     */
+    interface EndOfDeclarationMarker extends Statement {
+        kind: SyntaxKind.EndOfDeclarationMarker;
+    }
+    /**
+     * A list of comma-seperated expressions. This node is only created by transformations.
+     */
+    interface CommaListExpression extends Expression {
+        kind: SyntaxKind.CommaListExpression;
+        elements: NodeArray<Expression>;
+    }
+    /**
+     * Marks the beginning of a merged transformed declaration.
+     */
+    interface MergeDeclarationMarker extends Statement {
+        kind: SyntaxKind.MergeDeclarationMarker;
     }
     interface EmptyStatement extends Statement {
+        kind: SyntaxKind.EmptyStatement;
     }
     interface DebuggerStatement extends Statement {
+        kind: SyntaxKind.DebuggerStatement;
     }
     interface MissingDeclaration extends DeclarationStatement, ClassElement, ObjectLiteralElement, TypeElement {
+        kind: SyntaxKind.MissingDeclaration;
         name?: Identifier;
     }
-    type BlockLike = SourceFile | Block | ModuleBlock | CaseClause;
+    type BlockLike = SourceFile | Block | ModuleBlock | CaseOrDefaultClause;
     interface Block extends Statement {
+        kind: SyntaxKind.Block;
         statements: NodeArray<Statement>;
         multiLine?: boolean;
     }
     interface VariableStatement extends Statement {
+        kind: SyntaxKind.VariableStatement;
         declarationList: VariableDeclarationList;
     }
     interface ExpressionStatement extends Statement {
+        kind: SyntaxKind.ExpressionStatement;
         expression: Expression;
     }
+    interface PrologueDirective extends ExpressionStatement {
+        expression: StringLiteral;
+    }
     interface IfStatement extends Statement {
+        kind: SyntaxKind.IfStatement;
         expression: Expression;
         thenStatement: Statement;
         elseStatement?: Statement;
@@ -880,276 +1182,402 @@ declare namespace ts {
         statement: Statement;
     }
     interface DoStatement extends IterationStatement {
+        kind: SyntaxKind.DoStatement;
         expression: Expression;
     }
     interface WhileStatement extends IterationStatement {
+        kind: SyntaxKind.WhileStatement;
         expression: Expression;
     }
     type ForInitializer = VariableDeclarationList | Expression;
     interface ForStatement extends IterationStatement {
+        kind: SyntaxKind.ForStatement;
         initializer?: ForInitializer;
         condition?: Expression;
         incrementor?: Expression;
     }
+    type ForInOrOfStatement = ForInStatement | ForOfStatement;
     interface ForInStatement extends IterationStatement {
+        kind: SyntaxKind.ForInStatement;
         initializer: ForInitializer;
         expression: Expression;
     }
     interface ForOfStatement extends IterationStatement {
+        kind: SyntaxKind.ForOfStatement;
+        awaitModifier?: AwaitKeywordToken;
         initializer: ForInitializer;
         expression: Expression;
     }
     interface BreakStatement extends Statement {
+        kind: SyntaxKind.BreakStatement;
         label?: Identifier;
     }
     interface ContinueStatement extends Statement {
+        kind: SyntaxKind.ContinueStatement;
         label?: Identifier;
     }
     type BreakOrContinueStatement = BreakStatement | ContinueStatement;
     interface ReturnStatement extends Statement {
+        kind: SyntaxKind.ReturnStatement;
         expression?: Expression;
     }
     interface WithStatement extends Statement {
+        kind: SyntaxKind.WithStatement;
         expression: Expression;
         statement: Statement;
     }
     interface SwitchStatement extends Statement {
+        kind: SyntaxKind.SwitchStatement;
         expression: Expression;
         caseBlock: CaseBlock;
         possiblyExhaustive?: boolean;
     }
     interface CaseBlock extends Node {
+        kind: SyntaxKind.CaseBlock;
+        parent?: SwitchStatement;
         clauses: NodeArray<CaseOrDefaultClause>;
     }
     interface CaseClause extends Node {
+        kind: SyntaxKind.CaseClause;
+        parent?: CaseBlock;
         expression: Expression;
         statements: NodeArray<Statement>;
     }
     interface DefaultClause extends Node {
+        kind: SyntaxKind.DefaultClause;
+        parent?: CaseBlock;
         statements: NodeArray<Statement>;
     }
     type CaseOrDefaultClause = CaseClause | DefaultClause;
     interface LabeledStatement extends Statement {
+        kind: SyntaxKind.LabeledStatement;
         label: Identifier;
         statement: Statement;
     }
     interface ThrowStatement extends Statement {
+        kind: SyntaxKind.ThrowStatement;
         expression: Expression;
     }
     interface TryStatement extends Statement {
+        kind: SyntaxKind.TryStatement;
         tryBlock: Block;
         catchClause?: CatchClause;
         finallyBlock?: Block;
     }
     interface CatchClause extends Node {
+        kind: SyntaxKind.CatchClause;
+        parent?: TryStatement;
         variableDeclaration: VariableDeclaration;
         block: Block;
     }
-    type DeclarationWithTypeParameters = SignatureDeclaration | ClassLikeDeclaration | InterfaceDeclaration | TypeAliasDeclaration;
-    interface ClassLikeDeclaration extends Declaration {
+    type DeclarationWithTypeParameters = SignatureDeclaration | ClassLikeDeclaration | InterfaceDeclaration | TypeAliasDeclaration | JSDocTemplateTag;
+    interface ClassLikeDeclaration extends NamedDeclaration {
         name?: Identifier;
         typeParameters?: NodeArray<TypeParameterDeclaration>;
         heritageClauses?: NodeArray<HeritageClause>;
         members: NodeArray<ClassElement>;
     }
     interface ClassDeclaration extends ClassLikeDeclaration, DeclarationStatement {
+        kind: SyntaxKind.ClassDeclaration;
         name?: Identifier;
     }
     interface ClassExpression extends ClassLikeDeclaration, PrimaryExpression {
+        kind: SyntaxKind.ClassExpression;
     }
-    interface ClassElement extends Declaration {
+    interface ClassElement extends NamedDeclaration {
         _classElementBrand: any;
         name?: PropertyName;
     }
-    interface TypeElement extends Declaration {
+    interface TypeElement extends NamedDeclaration {
         _typeElementBrand: any;
         name?: PropertyName;
-        questionToken?: Node;
+        questionToken?: QuestionToken;
     }
     interface InterfaceDeclaration extends DeclarationStatement {
+        kind: SyntaxKind.InterfaceDeclaration;
         name: Identifier;
         typeParameters?: NodeArray<TypeParameterDeclaration>;
         heritageClauses?: NodeArray<HeritageClause>;
         members: NodeArray<TypeElement>;
     }
     interface HeritageClause extends Node {
-        token: SyntaxKind;
-        types?: NodeArray<ExpressionWithTypeArguments>;
+        kind: SyntaxKind.HeritageClause;
+        parent?: InterfaceDeclaration | ClassDeclaration | ClassExpression;
+        token: SyntaxKind.ExtendsKeyword | SyntaxKind.ImplementsKeyword;
+        types: NodeArray<ExpressionWithTypeArguments>;
     }
     interface TypeAliasDeclaration extends DeclarationStatement {
+        kind: SyntaxKind.TypeAliasDeclaration;
         name: Identifier;
         typeParameters?: NodeArray<TypeParameterDeclaration>;
         type: TypeNode;
     }
-    interface EnumMember extends Declaration {
+    interface EnumMember extends NamedDeclaration {
+        kind: SyntaxKind.EnumMember;
+        parent?: EnumDeclaration;
         name: PropertyName;
         initializer?: Expression;
     }
     interface EnumDeclaration extends DeclarationStatement {
+        kind: SyntaxKind.EnumDeclaration;
         name: Identifier;
         members: NodeArray<EnumMember>;
     }
-    type ModuleBody = ModuleBlock | ModuleDeclaration;
     type ModuleName = Identifier | StringLiteral;
+    type ModuleBody = NamespaceBody | JSDocNamespaceBody;
     interface ModuleDeclaration extends DeclarationStatement {
-        name: Identifier | LiteralExpression;
-        body?: ModuleBlock | ModuleDeclaration;
+        kind: SyntaxKind.ModuleDeclaration;
+        parent?: ModuleBody | SourceFile;
+        name: ModuleName;
+        body?: ModuleBody | JSDocNamespaceDeclaration;
+    }
+    type NamespaceBody = ModuleBlock | NamespaceDeclaration;
+    interface NamespaceDeclaration extends ModuleDeclaration {
+        name: Identifier;
+        body: NamespaceBody;
+    }
+    type JSDocNamespaceBody = Identifier | JSDocNamespaceDeclaration;
+    interface JSDocNamespaceDeclaration extends ModuleDeclaration {
+        name: Identifier;
+        body: JSDocNamespaceBody;
     }
     interface ModuleBlock extends Node, Statement {
+        kind: SyntaxKind.ModuleBlock;
+        parent?: ModuleDeclaration;
         statements: NodeArray<Statement>;
     }
     type ModuleReference = EntityName | ExternalModuleReference;
+    /**
+     * One of:
+     * - import x = require("mod");
+     * - import x = M.x;
+     */
     interface ImportEqualsDeclaration extends DeclarationStatement {
+        kind: SyntaxKind.ImportEqualsDeclaration;
+        parent?: SourceFile | ModuleBlock;
         name: Identifier;
         moduleReference: ModuleReference;
     }
     interface ExternalModuleReference extends Node {
+        kind: SyntaxKind.ExternalModuleReference;
+        parent?: ImportEqualsDeclaration;
         expression?: Expression;
     }
     interface ImportDeclaration extends Statement {
+        kind: SyntaxKind.ImportDeclaration;
+        parent?: SourceFile | ModuleBlock;
         importClause?: ImportClause;
+        /** If this is not a StringLiteral it will be a grammar error. */
         moduleSpecifier: Expression;
     }
     type NamedImportBindings = NamespaceImport | NamedImports;
-    interface ImportClause extends Declaration {
+    interface ImportClause extends NamedDeclaration {
+        kind: SyntaxKind.ImportClause;
+        parent?: ImportDeclaration;
         name?: Identifier;
         namedBindings?: NamedImportBindings;
     }
-    interface NamespaceImport extends Declaration {
+    interface NamespaceImport extends NamedDeclaration {
+        kind: SyntaxKind.NamespaceImport;
+        parent?: ImportClause;
         name: Identifier;
     }
     interface NamespaceExportDeclaration extends DeclarationStatement {
+        kind: SyntaxKind.NamespaceExportDeclaration;
         name: Identifier;
-        moduleReference: LiteralLikeNode;
     }
     interface ExportDeclaration extends DeclarationStatement {
+        kind: SyntaxKind.ExportDeclaration;
+        parent?: SourceFile | ModuleBlock;
         exportClause?: NamedExports;
+        /** If this is not a StringLiteral it will be a grammar error. */
         moduleSpecifier?: Expression;
     }
     interface NamedImports extends Node {
+        kind: SyntaxKind.NamedImports;
+        parent?: ImportClause;
         elements: NodeArray<ImportSpecifier>;
     }
     interface NamedExports extends Node {
+        kind: SyntaxKind.NamedExports;
+        parent?: ExportDeclaration;
         elements: NodeArray<ExportSpecifier>;
     }
     type NamedImportsOrExports = NamedImports | NamedExports;
-    interface ImportSpecifier extends Declaration {
+    interface ImportSpecifier extends NamedDeclaration {
+        kind: SyntaxKind.ImportSpecifier;
+        parent?: NamedImports;
         propertyName?: Identifier;
         name: Identifier;
     }
-    interface ExportSpecifier extends Declaration {
+    interface ExportSpecifier extends NamedDeclaration {
+        kind: SyntaxKind.ExportSpecifier;
+        parent?: NamedExports;
         propertyName?: Identifier;
         name: Identifier;
     }
     type ImportOrExportSpecifier = ImportSpecifier | ExportSpecifier;
     interface ExportAssignment extends DeclarationStatement {
+        kind: SyntaxKind.ExportAssignment;
+        parent?: SourceFile;
         isExportEquals?: boolean;
         expression: Expression;
     }
     interface FileReference extends TextRange {
         fileName: string;
     }
+    interface CheckJsDirective extends TextRange {
+        enabled: boolean;
+    }
+    type CommentKind = SyntaxKind.SingleLineCommentTrivia | SyntaxKind.MultiLineCommentTrivia;
     interface CommentRange extends TextRange {
         hasTrailingNewLine?: boolean;
-        kind: SyntaxKind;
+        kind: CommentKind;
+    }
+    interface SynthesizedComment extends CommentRange {
+        text: string;
+        pos: -1;
+        end: -1;
     }
     interface JSDocTypeExpression extends Node {
+        kind: SyntaxKind.JSDocTypeExpression;
         type: JSDocType;
     }
     interface JSDocType extends TypeNode {
         _jsDocTypeBrand: any;
     }
     interface JSDocAllType extends JSDocType {
-        _JSDocAllTypeBrand: any;
+        kind: SyntaxKind.JSDocAllType;
     }
     interface JSDocUnknownType extends JSDocType {
-        _JSDocUnknownTypeBrand: any;
+        kind: SyntaxKind.JSDocUnknownType;
     }
     interface JSDocArrayType extends JSDocType {
+        kind: SyntaxKind.JSDocArrayType;
         elementType: JSDocType;
     }
     interface JSDocUnionType extends JSDocType {
+        kind: SyntaxKind.JSDocUnionType;
         types: NodeArray<JSDocType>;
     }
     interface JSDocTupleType extends JSDocType {
+        kind: SyntaxKind.JSDocTupleType;
         types: NodeArray<JSDocType>;
     }
     interface JSDocNonNullableType extends JSDocType {
+        kind: SyntaxKind.JSDocNonNullableType;
         type: JSDocType;
     }
     interface JSDocNullableType extends JSDocType {
+        kind: SyntaxKind.JSDocNullableType;
         type: JSDocType;
     }
-    interface JSDocRecordType extends JSDocType, TypeLiteralNode {
+    interface JSDocRecordType extends JSDocType {
+        kind: SyntaxKind.JSDocRecordType;
         literal: TypeLiteralNode;
     }
     interface JSDocTypeReference extends JSDocType {
+        kind: SyntaxKind.JSDocTypeReference;
         name: EntityName;
         typeArguments: NodeArray<JSDocType>;
     }
     interface JSDocOptionalType extends JSDocType {
+        kind: SyntaxKind.JSDocOptionalType;
         type: JSDocType;
     }
     interface JSDocFunctionType extends JSDocType, SignatureDeclaration {
+        kind: SyntaxKind.JSDocFunctionType;
         parameters: NodeArray<ParameterDeclaration>;
         type: JSDocType;
     }
     interface JSDocVariadicType extends JSDocType {
+        kind: SyntaxKind.JSDocVariadicType;
         type: JSDocType;
     }
     interface JSDocConstructorType extends JSDocType {
+        kind: SyntaxKind.JSDocConstructorType;
         type: JSDocType;
     }
     interface JSDocThisType extends JSDocType {
+        kind: SyntaxKind.JSDocThisType;
         type: JSDocType;
     }
     interface JSDocLiteralType extends JSDocType {
+        kind: SyntaxKind.JSDocLiteralType;
         literal: LiteralTypeNode;
     }
     type JSDocTypeReferencingNode = JSDocThisType | JSDocConstructorType | JSDocVariadicType | JSDocOptionalType | JSDocNullableType | JSDocNonNullableType;
     interface JSDocRecordMember extends PropertySignature {
-        name: Identifier | LiteralExpression;
+        kind: SyntaxKind.JSDocRecordMember;
+        name: Identifier | StringLiteral | NumericLiteral;
         type?: JSDocType;
     }
     interface JSDoc extends Node {
+        kind: SyntaxKind.JSDocComment;
         tags: NodeArray<JSDocTag> | undefined;
         comment: string | undefined;
     }
     interface JSDocTag extends Node {
-        atToken: Node;
+        parent: JSDoc;
+        atToken: AtToken;
         tagName: Identifier;
         comment: string | undefined;
     }
+    interface JSDocUnknownTag extends JSDocTag {
+        kind: SyntaxKind.JSDocTag;
+    }
+    interface JSDocAugmentsTag extends JSDocTag {
+        kind: SyntaxKind.JSDocAugmentsTag;
+        typeExpression: JSDocTypeExpression;
+    }
+    interface JSDocClassTag extends JSDocTag {
+        kind: SyntaxKind.JSDocClassTag;
+    }
     interface JSDocTemplateTag extends JSDocTag {
+        kind: SyntaxKind.JSDocTemplateTag;
         typeParameters: NodeArray<TypeParameterDeclaration>;
     }
     interface JSDocReturnTag extends JSDocTag {
+        kind: SyntaxKind.JSDocReturnTag;
         typeExpression: JSDocTypeExpression;
     }
     interface JSDocTypeTag extends JSDocTag {
+        kind: SyntaxKind.JSDocTypeTag;
         typeExpression: JSDocTypeExpression;
     }
-    interface JSDocTypedefTag extends JSDocTag, Declaration {
+    interface JSDocTypedefTag extends JSDocTag, NamedDeclaration {
+        parent: JSDoc;
+        kind: SyntaxKind.JSDocTypedefTag;
+        fullName?: JSDocNamespaceDeclaration | Identifier;
         name?: Identifier;
         typeExpression?: JSDocTypeExpression;
         jsDocTypeLiteral?: JSDocTypeLiteral;
     }
     interface JSDocPropertyTag extends JSDocTag, TypeElement {
+        parent: JSDoc;
+        kind: SyntaxKind.JSDocPropertyTag;
         name: Identifier;
+        /** the parameter name, if provided *before* the type (TypeScript-style) */
+        preParameterName?: Identifier;
+        /** the parameter name, if provided *after* the type (JSDoc-standard) */
+        postParameterName?: Identifier;
         typeExpression: JSDocTypeExpression;
+        isBracketed: boolean;
     }
     interface JSDocTypeLiteral extends JSDocType {
+        kind: SyntaxKind.JSDocTypeLiteral;
         jsDocPropertyTags?: NodeArray<JSDocPropertyTag>;
         jsDocTypeTag?: JSDocTypeTag;
     }
     interface JSDocParameterTag extends JSDocTag {
+        kind: SyntaxKind.JSDocParameterTag;
         /** the parameter name, if provided *before* the type (TypeScript-style) */
         preParameterName?: Identifier;
         typeExpression?: JSDocTypeExpression;
         /** the parameter name, if provided *after* the type (JSDoc-standard) */
         postParameterName?: Identifier;
         /** the parameter name, regardless of the location it was provided */
-        parameterName: Identifier;
+        name: Identifier;
         isBracketed: boolean;
     }
     enum FlowFlags {
@@ -1161,17 +1589,30 @@ declare namespace ts {
         TrueCondition = 32,
         FalseCondition = 64,
         SwitchClause = 128,
-        Referenced = 256,
-        Shared = 512,
+        ArrayMutation = 256,
+        Referenced = 512,
+        Shared = 1024,
+        PreFinally = 2048,
+        AfterFinally = 4096,
         Label = 12,
         Condition = 96,
     }
+    interface FlowLock {
+        locked?: boolean;
+    }
+    interface AfterFinallyFlow extends FlowNode, FlowLock {
+        antecedent: FlowNode;
+    }
+    interface PreFinallyFlow extends FlowNode {
+        antecedent: FlowNode;
+        lock: FlowLock;
+    }
     interface FlowNode {
         flags: FlowFlags;
         id?: number;
     }
     interface FlowStart extends FlowNode {
-        container?: FunctionExpression | ArrowFunction;
+        container?: FunctionExpression | ArrowFunction | MethodDeclaration;
     }
     interface FlowLabel extends FlowNode {
         antecedents: FlowNode[];
@@ -1190,6 +1631,10 @@ declare namespace ts {
         clauseEnd: number;
         antecedent: FlowNode;
     }
+    interface FlowArrayMutation extends FlowNode {
+        node: CallExpression | BinaryExpression;
+        antecedent: FlowNode;
+    }
     type FlowType = Type | IncompleteType;
     interface IncompleteType {
         flags: TypeFlags;
@@ -1199,9 +1644,17 @@ declare namespace ts {
         path: string;
         name: string;
     }
+    /**
+     * Subset of properties from SourceFile that are used in multiple utility functions
+     */
+    interface SourceFileLike {
+        readonly text: string;
+        lineMap: number[];
+    }
     interface SourceFile extends Declaration {
+        kind: SyntaxKind.SourceFile;
         statements: NodeArray<Statement>;
-        endOfFileToken: Node;
+        endOfFileToken: Token<SyntaxKind.EndOfFileToken>;
         fileName: string;
         path: Path;
         text: string;
@@ -1231,14 +1684,25 @@ declare namespace ts {
         symbolCount: number;
         parseDiagnostics: Diagnostic[];
         bindDiagnostics: Diagnostic[];
+        jsDocDiagnostics?: Diagnostic[];
+        additionalSyntacticDiagnostics?: Diagnostic[];
         lineMap: number[];
         classifiableNames?: Map<string>;
-        resolvedModules: Map<ResolvedModule>;
+        resolvedModules: Map<ResolvedModuleFull>;
         resolvedTypeReferenceDirectiveNames: Map<ResolvedTypeReferenceDirective>;
-        imports: LiteralExpression[];
-        moduleAugmentations: LiteralExpression[];
+        imports: StringLiteral[];
+        moduleAugmentations: StringLiteral[];
         patternAmbientModules?: PatternAmbientModule[];
-        externalHelpersModuleName?: Identifier;
+        ambientModuleNames: string[];
+        checkJsDirective: CheckJsDirective | undefined;
+    }
+    interface Bundle extends Node {
+        kind: SyntaxKind.Bundle;
+        sourceFiles: SourceFile[];
+    }
+    interface JsonSourceFile extends SourceFile {
+        jsonObject?: ObjectLiteralExpression;
+        extendedSourceFiles?: string[];
     }
     interface ScriptReferenceHost {
         getCompilerOptions(): CompilerOptions;
@@ -1250,9 +1714,9 @@ declare namespace ts {
         useCaseSensitiveFileNames: boolean;
         readDirectory(rootDir: string, extensions: string[], excludes: string[], includes: string[]): string[];
         /**
-          * Gets a value indicating whether the specified path exists and is a file.
-          * @param path The path to test.
-          */
+         * Gets a value indicating whether the specified path exists and is a file.
+         * @param path The path to test.
+         */
         fileExists(path: string): boolean;
         readFile(path: string): string;
     }
@@ -1285,7 +1749,7 @@ declare namespace ts {
          * used for writing the JavaScript and declaration files.  Otherwise, the writeFile parameter
          * will be invoked when writing the JavaScript and declaration files.
          */
-        emit(targetSourceFile?: SourceFile, writeFile?: WriteFileCallback, cancellationToken?: CancellationToken, emitOnlyDtsFiles?: boolean): EmitResult;
+        emit(targetSourceFile?: SourceFile, writeFile?: WriteFileCallback, cancellationToken?: CancellationToken, emitOnlyDtsFiles?: boolean, customTransformers?: CustomTransformers): EmitResult;
         getOptionsDiagnostics(cancellationToken?: CancellationToken): Diagnostic[];
         getGlobalDiagnostics(cancellationToken?: CancellationToken): Diagnostic[];
         getSyntacticDiagnostics(sourceFile?: SourceFile, cancellationToken?: CancellationToken): Diagnostic[];
@@ -1305,7 +1769,20 @@ declare namespace ts {
         getTypeCount(): number;
         getFileProcessingDiagnostics(): DiagnosticCollection;
         getResolvedTypeReferenceDirectives(): Map<ResolvedTypeReferenceDirective>;
-        structureIsReused?: boolean;
+        isSourceFileFromExternalLibrary(file: SourceFile): boolean;
+        structureIsReused?: StructureIsReused;
+        getSourceFileFromReference(referencingFile: SourceFile, ref: FileReference): SourceFile | undefined;
+    }
+    enum StructureIsReused {
+        Not = 0,
+        SafeModules = 1,
+        Completely = 2,
+    }
+    interface CustomTransformers {
+        /** Custom transformers to evaluate before built-in transformations. */
+        before?: TransformerFactory<SourceFile>[];
+        /** Custom transformers to evaluate after built-in transformations. */
+        after?: TransformerFactory<SourceFile>[];
     }
     interface SourceMapSpan {
         /** Line number in the .js file. */
@@ -1356,40 +1833,68 @@ declare namespace ts {
         getTypeOfSymbolAtLocation(symbol: Symbol, node: Node): Type;
         getDeclaredTypeOfSymbol(symbol: Symbol): Type;
         getPropertiesOfType(type: Type): Symbol[];
-        getPropertyOfType(type: Type, propertyName: string): Symbol;
+        getPropertyOfType(type: Type, propertyName: string): Symbol | undefined;
+        getIndexInfoOfType(type: Type, kind: IndexKind): IndexInfo | undefined;
         getSignaturesOfType(type: Type, kind: SignatureKind): Signature[];
-        getIndexTypeOfType(type: Type, kind: IndexKind): Type;
-        getBaseTypes(type: InterfaceType): ObjectType[];
+        getIndexTypeOfType(type: Type, kind: IndexKind): Type | undefined;
+        getBaseTypes(type: InterfaceType): BaseType[];
+        getBaseTypeOfLiteralType(type: Type): Type;
+        getWidenedType(type: Type): Type;
         getReturnTypeOfSignature(signature: Signature): Type;
+        /**
+         * Gets the type of a parameter at a given position in a signature.
+         * Returns `any` if the index is not valid.
+         */
+        getParameterType(signature: Signature, parameterIndex: number): Type;
         getNonNullableType(type: Type): Type;
+        /** Note that the resulting nodes cannot be checked. */
+        typeToTypeNode(type: Type, enclosingDeclaration?: Node, flags?: NodeBuilderFlags): TypeNode;
+        /** Note that the resulting nodes cannot be checked. */
+        signatureToSignatureDeclaration(signature: Signature, kind: SyntaxKind, enclosingDeclaration?: Node, flags?: NodeBuilderFlags): SignatureDeclaration;
+        /** Note that the resulting nodes cannot be checked. */
+        indexInfoToIndexSignatureDeclaration(indexInfo: IndexInfo, kind: IndexKind, enclosingDeclaration?: Node, flags?: NodeBuilderFlags): IndexSignatureDeclaration;
         getSymbolsInScope(location: Node, meaning: SymbolFlags): Symbol[];
-        getSymbolAtLocation(node: Node): Symbol;
+        getSymbolAtLocation(node: Node): Symbol | undefined;
         getSymbolsOfParameterPropertyDeclaration(parameter: ParameterDeclaration, parameterName: string): Symbol[];
-        getShorthandAssignmentValueSymbol(location: Node): Symbol;
-        getExportSpecifierLocalTargetSymbol(location: ExportSpecifier): Symbol;
-        getPropertySymbolOfDestructuringAssignment(location: Identifier): Symbol;
+        getShorthandAssignmentValueSymbol(location: Node): Symbol | undefined;
+        getExportSpecifierLocalTargetSymbol(location: ExportSpecifier): Symbol | undefined;
+        getPropertySymbolOfDestructuringAssignment(location: Identifier): Symbol | undefined;
         getTypeAtLocation(node: Node): Type;
+        getTypeFromTypeNode(node: TypeNode): Type;
+        signatureToString(signature: Signature, enclosingDeclaration?: Node, flags?: TypeFormatFlags, kind?: SignatureKind): string;
         typeToString(type: Type, enclosingDeclaration?: Node, flags?: TypeFormatFlags): string;
         symbolToString(symbol: Symbol, enclosingDeclaration?: Node, meaning?: SymbolFlags): string;
         getSymbolDisplayBuilder(): SymbolDisplayBuilder;
         getFullyQualifiedName(symbol: Symbol): string;
         getAugmentedPropertiesOfType(type: Type): Symbol[];
         getRootSymbols(symbol: Symbol): Symbol[];
-        getContextualType(node: Expression): Type;
-        getResolvedSignature(node: CallLikeExpression, candidatesOutArray?: Signature[]): Signature;
-        getSignatureFromDeclaration(declaration: SignatureDeclaration): Signature;
-        isImplementationOfOverload(node: FunctionLikeDeclaration): boolean;
+        getContextualType(node: Expression): Type | undefined;
+        getResolvedSignature(node: CallLikeExpression, candidatesOutArray?: Signature[]): Signature | undefined;
+        getSignatureFromDeclaration(declaration: SignatureDeclaration): Signature | undefined;
+        isImplementationOfOverload(node: FunctionLikeDeclaration): boolean | undefined;
         isUndefinedSymbol(symbol: Symbol): boolean;
         isArgumentsSymbol(symbol: Symbol): boolean;
         isUnknownSymbol(symbol: Symbol): boolean;
-        getConstantValue(node: EnumMember | PropertyAccessExpression | ElementAccessExpression): number;
+        getMergedSymbol(symbol: Symbol): Symbol;
+        getConstantValue(node: EnumMember | PropertyAccessExpression | ElementAccessExpression): string | number | undefined;
         isValidPropertyAccess(node: PropertyAccessExpression | QualifiedName, propertyName: string): boolean;
+        /** Follow all aliases to get the original symbol. */
         getAliasedSymbol(symbol: Symbol): Symbol;
+        /** Follow a *single* alias to get the immediately aliased symbol. */
+        getImmediateAliasedSymbol(symbol: Symbol): Symbol;
         getExportsOfModule(moduleSymbol: Symbol): Symbol[];
-        getJsxElementAttributesType(elementNode: JsxOpeningLikeElement): Type;
+        /** Unlike `getExportsOfModule`, this includes properties of an `export =` value. */
+        getExportsAndPropertiesOfModule(moduleSymbol: Symbol): Symbol[];
+        getAllAttributesTypeFromJsxOpeningLikeElement(elementNode: JsxOpeningLikeElement): Type | undefined;
         getJsxIntrinsicTagNames(): Symbol[];
         isOptionalParameter(node: ParameterDeclaration): boolean;
         getAmbientModules(): Symbol[];
+        tryGetMemberInModuleExports(memberName: string, moduleSymbol: Symbol): Symbol | undefined;
+        getApparentType(type: Type): Type;
+        getSuggestionForNonexistentProperty(node: Identifier, containingType: Type): string | undefined;
+        getSuggestionForNonexistentSymbol(location: Node, name: string, meaning: SymbolFlags): string | undefined;
+        getBaseConstraintOfType(type: Type): Type | undefined;
+        tryFindAmbientModuleWithoutAugmentations(moduleName: string): Symbol | undefined;
         getDiagnostics(sourceFile?: SourceFile, cancellationToken?: CancellationToken): Diagnostic[];
         getGlobalDiagnostics(): Diagnostic[];
         getEmitResolver(sourceFile?: SourceFile, cancellationToken?: CancellationToken): EmitResolver;
@@ -1397,11 +1902,37 @@ declare namespace ts {
         getIdentifierCount(): number;
         getSymbolCount(): number;
         getTypeCount(): number;
+        /**
+         * For a union, will include a property if it's defined in *any* of the member types.
+         * So for `{ a } | { b }`, this will include both `a` and `b`.
+         * Does not include properties of primitive types.
+         */
+        getAllPossiblePropertiesOfType(type: Type): Symbol[];
+        getJsxNamespace(): string;
+        resolveNameAtLocation(location: Node, name: string, meaning: SymbolFlags): Symbol | undefined;
+    }
+    enum NodeBuilderFlags {
+        None = 0,
+        NoTruncation = 1,
+        WriteArrayAsGenericType = 2,
+        WriteTypeArgumentsOfSignature = 32,
+        UseFullyQualifiedType = 64,
+        SuppressAnyReturnType = 256,
+        WriteTypeParametersInQualifiedName = 512,
+        AllowThisInObjectLiteral = 1024,
+        AllowQualifedNameInPlaceOfIdentifier = 2048,
+        AllowAnonymousIdentifier = 8192,
+        AllowEmptyUnionOrIntersection = 16384,
+        AllowEmptyTuple = 32768,
+        IgnoreErrors = 60416,
+        InObjectTypeLiteral = 1048576,
+        InTypeAlias = 8388608,
     }
     interface SymbolDisplayBuilder {
         buildTypeDisplay(type: Type, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
         buildSymbolDisplay(symbol: Symbol, writer: SymbolWriter, enclosingDeclaration?: Node, meaning?: SymbolFlags, flags?: SymbolFormatFlags): void;
-        buildSignatureDisplay(signatures: Signature, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags, kind?: SignatureKind): void;
+        buildSignatureDisplay(signature: Signature, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags, kind?: SignatureKind): void;
+        buildIndexSignatureDisplay(info: IndexInfo, writer: SymbolWriter, kind: IndexKind, enclosingDeclaration?: Node, globalFlags?: TypeFormatFlags, symbolStack?: Symbol[]): void;
         buildParameterDisplay(parameter: Symbol, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
         buildTypeParameterDisplay(tp: TypeParameter, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
         buildTypePredicateDisplay(predicate: TypePredicate, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
@@ -1417,6 +1948,7 @@ declare namespace ts {
         writeSpace(text: string): void;
         writeStringLiteral(text: string): void;
         writeParameter(text: string): void;
+        writeProperty(text: string): void;
         writeSymbol(text: string, symbol: Symbol): void;
         writeLine(): void;
         increaseIndent(): void;
@@ -1424,20 +1956,24 @@ declare namespace ts {
         clear(): void;
         trackSymbol(symbol: Symbol, enclosingDeclaration?: Node, meaning?: SymbolFlags): void;
         reportInaccessibleThisError(): void;
+        reportPrivateInBaseOfClassExpression(propertyName: string): void;
     }
     enum TypeFormatFlags {
         None = 0,
         WriteArrayAsGenericType = 1,
-        UseTypeOfFunction = 2,
-        NoTruncation = 4,
-        WriteArrowStyleSignature = 8,
-        WriteOwnNameForAnyLike = 16,
-        WriteTypeArgumentsOfSignature = 32,
-        InElementType = 64,
-        UseFullyQualifiedType = 128,
-        InFirstTypeArgument = 256,
-        InTypeAlias = 512,
-        UseTypeAliasValue = 1024,
+        UseTypeOfFunction = 4,
+        NoTruncation = 8,
+        WriteArrowStyleSignature = 16,
+        WriteOwnNameForAnyLike = 32,
+        WriteTypeArgumentsOfSignature = 64,
+        InElementType = 128,
+        UseFullyQualifiedType = 256,
+        InFirstTypeArgument = 512,
+        InTypeAlias = 1024,
+        UseTypeAliasValue = 2048,
+        SuppressAnyReturnType = 4096,
+        AddUndefined = 8192,
+        WriteClassExpressionAsTypeLiteral = 16384,
     }
     enum SymbolFormatFlags {
         None = 0,
@@ -1449,6 +1985,10 @@ declare namespace ts {
         NotAccessible = 1,
         CannotBeNamed = 2,
     }
+    enum SyntheticSymbolKind {
+        UnionOrIntersection = 0,
+        Spread = 1,
+    }
     enum TypePredicateKind {
         This = 0,
         Identifier = 1,
@@ -1458,9 +1998,10 @@ declare namespace ts {
         type: Type;
     }
     interface ThisTypePredicate extends TypePredicateBase {
-        _thisTypePredicateBrand: any;
+        kind: TypePredicateKind.This;
     }
     interface IdentifierTypePredicate extends TypePredicateBase {
+        kind: TypePredicateKind.Identifier;
         parameterName: string;
         parameterIndex: number;
     }
@@ -1475,8 +2016,7 @@ declare namespace ts {
     interface SymbolAccessibilityResult extends SymbolVisibilityResult {
         errorModuleName?: string;
     }
-    /** Indicates how to serialize the name for a TypeReferenceNode when emitting decorator
-      * metadata */
+    /** Indicates how to serialize the name for a TypeReferenceNode when emitting decorator metadata */
     enum TypeReferenceSerializationKind {
         Unknown = 0,
         TypeWithConstructSignatureAndValue = 1,
@@ -1502,14 +2042,15 @@ declare namespace ts {
         getNodeCheckFlags(node: Node): NodeCheckFlags;
         isDeclarationVisible(node: Declaration): boolean;
         collectLinkedAliases(node: Identifier): Node[];
-        isImplementationOfOverload(node: FunctionLikeDeclaration): boolean;
+        isImplementationOfOverload(node: FunctionLikeDeclaration): boolean | undefined;
+        isRequiredInitializedParameter(node: ParameterDeclaration): boolean;
+        isOptionalUninitializedParameterProperty(node: ParameterDeclaration): boolean;
         writeTypeOfDeclaration(declaration: AccessorDeclaration | VariableLikeDeclaration, enclosingDeclaration: Node, flags: TypeFormatFlags, writer: SymbolWriter): void;
         writeReturnTypeOfSignatureDeclaration(signatureDeclaration: SignatureDeclaration, enclosingDeclaration: Node, flags: TypeFormatFlags, writer: SymbolWriter): void;
         writeTypeOfExpression(expr: Expression, enclosingDeclaration: Node, flags: TypeFormatFlags, writer: SymbolWriter): void;
-        writeBaseConstructorTypeOfClass(node: ClassLikeDeclaration, enclosingDeclaration: Node, flags: TypeFormatFlags, writer: SymbolWriter): void;
         isSymbolAccessible(symbol: Symbol, enclosingDeclaration: Node, meaning: SymbolFlags, shouldComputeAliasToMarkVisible: boolean): SymbolAccessibilityResult;
         isEntityNameVisible(entityName: EntityNameOrEntityNameExpression, enclosingDeclaration: Node): SymbolVisibilityResult;
-        getConstantValue(node: EnumMember | PropertyAccessExpression | ElementAccessExpression): number;
+        getConstantValue(node: EnumMember | PropertyAccessExpression | ElementAccessExpression): string | number;
         getReferencedValueDeclaration(reference: Identifier): Declaration;
         getTypeReferenceSerializationKind(typeName: EntityName, location?: Node): TypeReferenceSerializationKind;
         isOptionalParameter(node: ParameterDeclaration): boolean;
@@ -1518,8 +2059,9 @@ declare namespace ts {
         getExternalModuleFileFromDeclaration(declaration: ImportEqualsDeclaration | ImportDeclaration | ExportDeclaration | ModuleDeclaration): SourceFile;
         getTypeReferenceDirectivesForEntityName(name: EntityNameOrEntityNameExpression): string[];
         getTypeReferenceDirectivesForSymbol(symbol: Symbol, meaning?: SymbolFlags): string[];
-        isLiteralConstDeclaration(node: VariableDeclaration): boolean;
-        writeLiteralConstValue(node: VariableDeclaration, writer: SymbolWriter): void;
+        isLiteralConstDeclaration(node: VariableDeclaration | PropertyDeclaration | PropertySignature | ParameterDeclaration): boolean;
+        writeLiteralConstValue(node: VariableDeclaration | PropertyDeclaration | PropertySignature | ParameterDeclaration, writer: SymbolWriter): void;
+        getJsxFactoryEntity(): EntityName;
     }
     enum SymbolFlags {
         None = 0,
@@ -1547,13 +2089,10 @@ declare namespace ts {
         ExportType = 2097152,
         ExportNamespace = 4194304,
         Alias = 8388608,
-        Instantiated = 16777216,
-        Merged = 33554432,
-        Transient = 67108864,
-        Prototype = 134217728,
-        SyntheticProperty = 268435456,
-        Optional = 536870912,
-        ExportStar = 1073741824,
+        Prototype = 16777216,
+        ExportStar = 33554432,
+        Optional = 67108864,
+        Transient = 134217728,
         Enum = 384,
         Variable = 3,
         Value = 107455,
@@ -1597,7 +2136,6 @@ declare namespace ts {
         members?: SymbolTable;
         exports?: SymbolTable;
         globalExports?: SymbolTable;
-        isReadonly?: boolean;
         id?: number;
         mergeId?: number;
         parent?: Symbol;
@@ -1608,6 +2146,7 @@ declare namespace ts {
         isAssigned?: boolean;
     }
     interface SymbolLinks {
+        immediateTarget?: Symbol;
         target?: Symbol;
         type?: Type;
         declaredType?: Type;
@@ -1617,16 +2156,38 @@ declare namespace ts {
         mapper?: TypeMapper;
         referenced?: boolean;
         containingType?: UnionOrIntersectionType;
-        hasNonUniformType?: boolean;
-        isPartial?: boolean;
+        leftSpread?: Symbol;
+        rightSpread?: Symbol;
+        syntheticOrigin?: Symbol;
         isDiscriminantProperty?: boolean;
         resolvedExports?: SymbolTable;
         exportsChecked?: boolean;
+        typeParametersChecked?: boolean;
         isDeclarationWithCollidingName?: boolean;
         bindingElement?: BindingElement;
         exportsSomeValue?: boolean;
+        enumKind?: EnumKind;
+    }
+    enum EnumKind {
+        Numeric = 0,
+        Literal = 1,
+    }
+    enum CheckFlags {
+        Instantiated = 1,
+        SyntheticProperty = 2,
+        SyntheticMethod = 4,
+        Readonly = 8,
+        Partial = 16,
+        HasNonUniformType = 32,
+        ContainsPublic = 64,
+        ContainsProtected = 128,
+        ContainsPrivate = 256,
+        ContainsStatic = 512,
+        Synthetic = 6,
     }
     interface TransientSymbol extends Symbol, SymbolLinks {
+        checkFlags: CheckFlags;
+        isRestParameter?: boolean;
     }
     type SymbolTable = Map<Symbol>;
     /** Represents a "prefix*suffix" pattern. */
@@ -1643,6 +2204,7 @@ declare namespace ts {
         TypeChecked = 1,
         LexicalThis = 2,
         CaptureThis = 4,
+        CaptureNewTarget = 8,
         SuperInstance = 256,
         SuperStatic = 512,
         ContextChecked = 1024,
@@ -1667,11 +2229,13 @@ declare namespace ts {
         resolvedSignature?: Signature;
         resolvedSymbol?: Symbol;
         resolvedIndexInfo?: IndexInfo;
-        enumMemberValue?: number;
+        maybeTypePredicate?: boolean;
+        enumMemberValue?: string | number;
         isVisible?: boolean;
+        containsArgumentsReference?: boolean;
         hasReportedStatementInAmbientContext?: boolean;
         jsxFlags?: JsxFlags;
-        resolvedJsxType?: Type;
+        resolvedJsxElementAttributesType?: Type;
         hasSuperCall?: boolean;
         superCall?: ExpressionStatement;
         switchTypes?: Type[];
@@ -1692,45 +2256,42 @@ declare namespace ts {
         Null = 4096,
         Never = 8192,
         TypeParameter = 16384,
-        Class = 32768,
-        Interface = 65536,
-        Reference = 131072,
-        Tuple = 262144,
-        Union = 524288,
-        Intersection = 1048576,
-        Anonymous = 2097152,
-        Instantiated = 4194304,
-        ObjectLiteral = 8388608,
-        FreshLiteral = 16777216,
-        ContainsWideningType = 33554432,
-        ContainsObjectLiteral = 67108864,
-        ContainsAnyFunctionType = 134217728,
-        ThisType = 268435456,
-        ObjectLiteralPatternWithComputedProperties = 536870912,
+        Object = 32768,
+        Union = 65536,
+        Intersection = 131072,
+        Index = 262144,
+        IndexedAccess = 524288,
+        FreshLiteral = 1048576,
+        ContainsWideningType = 2097152,
+        ContainsObjectLiteral = 4194304,
+        ContainsAnyFunctionType = 8388608,
+        NonPrimitive = 16777216,
+        JsxAttributes = 33554432,
         Nullable = 6144,
-        Literal = 480,
+        Literal = 224,
         StringOrNumberLiteral = 96,
         DefinitelyFalsy = 7392,
         PossiblyFalsy = 7406,
-        Intrinsic = 16015,
+        Intrinsic = 16793231,
         Primitive = 8190,
-        StringLike = 34,
-        NumberLike = 340,
+        StringLike = 262178,
+        NumberLike = 84,
         BooleanLike = 136,
         EnumLike = 272,
-        ObjectType = 2588672,
-        UnionOrIntersection = 1572864,
-        StructuredType = 4161536,
-        StructuredOrTypeParameter = 4177920,
-        Narrowable = 4178943,
-        NotUnionOrUnit = 2589191,
-        RequiresWidening = 100663296,
-        PropagatingFlags = 234881024,
+        UnionOrIntersection = 196608,
+        StructuredType = 229376,
+        StructuredOrTypeVariable = 1032192,
+        TypeVariable = 540672,
+        Narrowable = 17810175,
+        NotUnionOrUnit = 16810497,
+        RequiresWidening = 6291456,
+        PropagatingFlags = 14680064,
     }
     type DestructuringPattern = BindingPattern | ObjectLiteralExpression | ArrayLiteralExpression;
     interface Type {
         flags: TypeFlags;
         id: number;
+        checker: TypeChecker;
         symbol?: Symbol;
         pattern?: DestructuringPattern;
         aliasSymbol?: Symbol;
@@ -1740,26 +2301,44 @@ declare namespace ts {
         intrinsicName: string;
     }
     interface LiteralType extends Type {
-        text: string;
+        value: string | number;
         freshType?: LiteralType;
         regularType?: LiteralType;
     }
+    interface StringLiteralType extends LiteralType {
+        value: string;
+    }
+    interface NumberLiteralType extends LiteralType {
+        value: number;
+    }
     interface EnumType extends Type {
-        memberTypes: Map<EnumLiteralType>;
     }
-    interface EnumLiteralType extends LiteralType {
-        baseType: EnumType & UnionType;
+    enum ObjectFlags {
+        Class = 1,
+        Interface = 2,
+        Reference = 4,
+        Tuple = 8,
+        Anonymous = 16,
+        Mapped = 32,
+        Instantiated = 64,
+        ObjectLiteral = 128,
+        EvolvingArray = 256,
+        ObjectLiteralPatternWithComputedProperties = 512,
+        ClassOrInterface = 3,
     }
     interface ObjectType extends Type {
+        objectFlags: ObjectFlags;
     }
+    /** Class and interface types (TypeFlags.Class and TypeFlags.Interface). */
     interface InterfaceType extends ObjectType {
         typeParameters: TypeParameter[];
         outerTypeParameters: TypeParameter[];
         localTypeParameters: TypeParameter[];
         thisType: TypeParameter;
         resolvedBaseConstructorType?: Type;
-        resolvedBaseTypes: ObjectType[];
+        resolvedBaseTypes: BaseType[];
     }
+    type BaseType = ObjectType | IntersectionType;
     interface InterfaceTypeWithDeclaredMembers extends InterfaceType {
         declaredProperties: Symbol[];
         declaredCallSignatures: Signature[];
@@ -1767,26 +2346,53 @@ declare namespace ts {
         declaredStringIndexInfo: IndexInfo;
         declaredNumberIndexInfo: IndexInfo;
     }
+    /**
+     * Type references (TypeFlags.Reference). When a class or interface has type parameters or
+     * a "this" type, references to the class or interface are made using type references. The
+     * typeArguments property specifies the types to substitute for the type parameters of the
+     * class or interface and optionally includes an extra element that specifies the type to
+     * substitute for "this" in the resulting instantiation. When no extra argument is present,
+     * the type reference itself is substituted for "this". The typeArguments property is undefined
+     * if the class or interface has no type parameters and the reference isn't specifying an
+     * explicit "this" argument.
+     */
     interface TypeReference extends ObjectType {
         target: GenericType;
-        typeArguments: Type[];
+        typeArguments?: Type[];
     }
     interface GenericType extends InterfaceType, TypeReference {
         instantiations: Map<TypeReference>;
     }
     interface UnionOrIntersectionType extends Type {
         types: Type[];
-        resolvedProperties: SymbolTable;
-        couldContainTypeParameters: boolean;
+        propertyCache: SymbolTable;
+        resolvedProperties: Symbol[];
+        resolvedIndexType: IndexType;
+        resolvedBaseConstraint: Type;
+        couldContainTypeVariables: boolean;
     }
     interface UnionType extends UnionOrIntersectionType {
     }
     interface IntersectionType extends UnionOrIntersectionType {
+        resolvedApparentType: Type;
     }
+    type StructuredType = ObjectType | UnionType | IntersectionType;
     interface AnonymousType extends ObjectType {
         target?: AnonymousType;
         mapper?: TypeMapper;
     }
+    interface MappedType extends ObjectType {
+        declaration: MappedTypeNode;
+        typeParameter?: TypeParameter;
+        constraintType?: Type;
+        templateType?: Type;
+        modifiersType?: Type;
+        mapper?: TypeMapper;
+    }
+    interface EvolvingArrayType extends ObjectType {
+        elementType: Type;
+        finalArrayType?: Type;
+    }
     interface ResolvedType extends ObjectType, UnionOrIntersectionType {
         members: SymbolTable;
         properties: Symbol[];
@@ -1799,14 +2405,35 @@ declare namespace ts {
         regularType: ResolvedType;
     }
     interface IterableOrIteratorType extends ObjectType, UnionType {
-        iterableElementType?: Type;
-        iteratorElementType?: Type;
+        iteratedTypeOfIterable?: Type;
+        iteratedTypeOfIterator?: Type;
+        iteratedTypeOfAsyncIterable?: Type;
+        iteratedTypeOfAsyncIterator?: Type;
+    }
+    interface PromiseOrAwaitableType extends ObjectType, UnionType {
+        promiseTypeOfPromiseConstructor?: Type;
+        promisedTypeOfPromise?: Type;
+        awaitedTypeOfType?: Type;
+    }
+    interface TypeVariable extends Type {
+        resolvedBaseConstraint: Type;
+        resolvedIndexType: IndexType;
     }
-    interface TypeParameter extends Type {
+    interface TypeParameter extends TypeVariable {
         constraint: Type;
+        default?: Type;
         target?: TypeParameter;
         mapper?: TypeMapper;
-        resolvedApparentType: Type;
+        isThisType?: boolean;
+        resolvedDefaultType?: Type;
+    }
+    interface IndexedAccessType extends TypeVariable {
+        objectType: Type;
+        indexType: Type;
+        constraint?: Type;
+    }
+    interface IndexType extends Type {
+        type: TypeVariable | UnionOrIntersectionType;
     }
     enum SignatureKind {
         Call = 0,
@@ -1814,7 +2441,7 @@ declare namespace ts {
     }
     interface Signature {
         declaration: SignatureDeclaration;
-        typeParameters: TypeParameter[];
+        typeParameters?: TypeParameter[];
         parameters: Symbol[];
         thisParameter?: Symbol;
         resolvedReturnType: Type;
@@ -1827,6 +2454,7 @@ declare namespace ts {
         erasedSignatureCache?: Signature;
         isolatedSignatureType?: ObjectType;
         typePredicate?: TypePredicate;
+        instantiations?: Map<Signature>;
     }
     enum IndexKind {
         String = 0,
@@ -1840,23 +2468,30 @@ declare namespace ts {
     interface TypeMapper {
         (t: TypeParameter): Type;
         mappedTypes?: Type[];
-        targetTypes?: Type[];
         instantiations?: Type[];
-        context?: InferenceContext;
     }
-    interface TypeInferences {
-        primary: Type[];
-        secondary: Type[];
+    enum InferencePriority {
+        NakedTypeVariable = 1,
+        MappedType = 2,
+        ReturnType = 4,
+    }
+    interface InferenceInfo {
+        typeParameter: TypeParameter;
+        candidates: Type[];
+        inferredType: Type;
+        priority: InferencePriority;
         topLevel: boolean;
         isFixed: boolean;
     }
-    interface InferenceContext {
+    enum InferenceFlags {
+        InferUnionTypes = 1,
+        NoDefault = 2,
+        AnyDefault = 4,
+    }
+    interface InferenceContext extends TypeMapper {
         signature: Signature;
-        inferUnionTypes: boolean;
-        inferences: TypeInferences[];
-        inferredTypes: Type[];
-        mapper?: TypeMapper;
-        failedTypeParameterIndex?: number;
+        inferences: InferenceInfo[];
+        flags: InferenceFlags;
     }
     enum SpecialPropertyAssignmentKind {
         None = 0,
@@ -1864,6 +2499,11 @@ declare namespace ts {
         ModuleExports = 2,
         PrototypeProperty = 3,
         ThisProperty = 4,
+        Property = 5,
+    }
+    interface JsFileExtensionInfo {
+        extension: string;
+        isMixedContent: boolean;
     }
     interface DiagnosticMessage {
         key: string;
@@ -1884,12 +2524,13 @@ declare namespace ts {
         next?: DiagnosticMessageChain;
     }
     interface Diagnostic {
-        file: SourceFile;
-        start: number;
-        length: number;
+        file: SourceFile | undefined;
+        start: number | undefined;
+        length: number | undefined;
         messageText: string | DiagnosticMessageChain;
         category: DiagnosticCategory;
         code: number;
+        source?: string;
     }
     enum DiagnosticCategory {
         Warning = 0,
@@ -1900,24 +2541,29 @@ declare namespace ts {
         Classic = 1,
         NodeJs = 2,
     }
-    type RootPaths = string[];
-    type PathSubstitutions = MapLike<string[]>;
-    type TsConfigOnlyOptions = RootPaths | PathSubstitutions;
-    type CompilerOptionsValue = string | number | boolean | (string | number)[] | TsConfigOnlyOptions;
+    interface PluginImport {
+        name: string;
+    }
+    type CompilerOptionsValue = string | number | boolean | (string | number)[] | string[] | MapLike<string[]> | PluginImport[];
     interface CompilerOptions {
+        all?: boolean;
         allowJs?: boolean;
         allowNonTsExtensions?: boolean;
         allowSyntheticDefaultImports?: boolean;
         allowUnreachableCode?: boolean;
         allowUnusedLabels?: boolean;
+        alwaysStrict?: boolean;
         baseUrl?: string;
         charset?: string;
+        checkJs?: boolean;
         configFilePath?: string;
+        readonly configFile?: JsonSourceFile;
         declaration?: boolean;
         declarationDir?: string;
         diagnostics?: boolean;
         extendedDiagnostics?: boolean;
         disableSizeLimit?: boolean;
+        downlevelIteration?: boolean;
         emitBOM?: boolean;
         emitDecoratorMetadata?: boolean;
         experimentalDecorators?: boolean;
@@ -1939,6 +2585,7 @@ declare namespace ts {
         moduleResolution?: ModuleResolutionKind;
         newLine?: NewLineKind;
         noEmit?: boolean;
+        noEmitForJsFiles?: boolean;
         noEmitHelpers?: boolean;
         noEmitOnError?: boolean;
         noErrorTruncation?: boolean;
@@ -1946,6 +2593,7 @@ declare namespace ts {
         noImplicitAny?: boolean;
         noImplicitReturns?: boolean;
         noImplicitThis?: boolean;
+        noStrictGenericChecks?: boolean;
         noUnusedLocals?: boolean;
         noUnusedParameters?: boolean;
         noImplicitUseStrict?: boolean;
@@ -1954,18 +2602,21 @@ declare namespace ts {
         out?: string;
         outDir?: string;
         outFile?: string;
-        paths?: PathSubstitutions;
+        paths?: MapLike<string[]>;
+        plugins?: PluginImport[];
         preserveConstEnums?: boolean;
         project?: string;
         pretty?: DiagnosticStyle;
         reactNamespace?: string;
+        jsxFactory?: string;
         removeComments?: boolean;
         rootDir?: string;
-        rootDirs?: RootPaths;
+        rootDirs?: string[];
         skipLibCheck?: boolean;
         skipDefaultLibCheck?: boolean;
         sourceMap?: boolean;
         sourceRoot?: string;
+        strict?: boolean;
         strictNullChecks?: boolean;
         stripInternal?: boolean;
         suppressExcessPropertyErrors?: boolean;
@@ -1974,14 +2625,15 @@ declare namespace ts {
         target?: ScriptTarget;
         traceResolution?: boolean;
         types?: string[];
-        /** Paths used to used to compute primary types search locations */
+        /** Paths used to compute primary types search locations */
         typeRoots?: string[];
         version?: boolean;
         watch?: boolean;
-        [option: string]: CompilerOptionsValue | undefined;
+        [option: string]: CompilerOptionsValue | JsonSourceFile | undefined;
     }
-    interface TypingOptions {
+    interface TypeAcquisition {
         enableAutoDiscovery?: boolean;
+        enable?: boolean;
         include?: string[];
         exclude?: string[];
         [option: string]: string[] | boolean | undefined;
@@ -1991,8 +2643,9 @@ declare namespace ts {
         projectRootPath: string;
         safeListPath: string;
         packageNameToTypingLocation: Map<string>;
-        typingOptions: TypingOptions;
+        typeAcquisition: TypeAcquisition;
         compilerOptions: CompilerOptions;
+        unresolvedImports: ReadonlyArray<string>;
     }
     enum ModuleKind {
         None = 0,
@@ -2000,13 +2653,14 @@ declare namespace ts {
         AMD = 2,
         UMD = 3,
         System = 4,
-        ES6 = 5,
         ES2015 = 5,
+        ESNext = 6,
     }
     enum JsxEmit {
         None = 0,
         Preserve = 1,
         React = 2,
+        ReactNative = 3,
     }
     enum NewLineKind {
         CarriageReturnLineFeed = 0,
@@ -2022,13 +2676,17 @@ declare namespace ts {
         JSX = 2,
         TS = 3,
         TSX = 4,
+        External = 5,
+        JSON = 6,
     }
     enum ScriptTarget {
         ES3 = 0,
         ES5 = 1,
-        ES6 = 2,
         ES2015 = 2,
-        Latest = 2,
+        ES2016 = 3,
+        ES2017 = 4,
+        ESNext = 5,
+        Latest = 5,
     }
     enum LanguageVariant {
         Standard = 0,
@@ -2038,9 +2696,10 @@ declare namespace ts {
         Simple = 0,
         Pretty = 1,
     }
+    /** Either a parsed command line or a parsed tsconfig.json */
     interface ParsedCommandLine {
         options: CompilerOptions;
-        typingOptions?: TypingOptions;
+        typeAcquisition?: TypeAcquisition;
         fileNames: string[];
         raw?: any;
         errors: Diagnostic[];
@@ -2062,8 +2721,10 @@ declare namespace ts {
         shortName?: string;
         description?: DiagnosticMessage;
         paramType?: DiagnosticMessage;
-        experimental?: boolean;
         isTSConfigOnly?: boolean;
+        isCommandLineOnly?: boolean;
+        showInSimplifiedHelpView?: boolean;
+        category?: DiagnosticMessage;
     }
     interface CommandLineOptionOfPrimitiveType extends CommandLineOptionBase {
         type: "string" | "number" | "boolean";
@@ -2073,10 +2734,12 @@ declare namespace ts {
     }
     interface TsConfigOnlyOption extends CommandLineOptionBase {
         type: "object";
+        elementOptions?: Map<CommandLineOption>;
+        extraKeyDiagnosticMessage?: DiagnosticMessage;
     }
     interface CommandLineOptionOfListType extends CommandLineOptionBase {
         type: "list";
-        element: CommandLineOptionOfCustomType | CommandLineOptionOfPrimitiveType;
+        element: CommandLineOptionOfCustomType | CommandLineOptionOfPrimitiveType | TsConfigOnlyOption;
     }
     type CommandLineOption = CommandLineOptionOfCustomType | CommandLineOptionOfPrimitiveType | TsConfigOnlyOption | CommandLineOptionOfListType;
     enum CharacterCodes {
@@ -2214,12 +2877,44 @@ declare namespace ts {
         getCurrentDirectory?(): string;
         getDirectories?(path: string): string[];
     }
+    /**
+     * Represents the result of module resolution.
+     * Module resolution will pick up tsx/jsx/js files even if '--jsx' and '--allowJs' are turned off.
+     * The Program will then filter results based on these flags.
+     *
+     * Prefer to return a `ResolvedModuleFull` so that the file type does not have to be inferred.
+     */
     interface ResolvedModule {
+        /** Path of the file the module was resolved to. */
         resolvedFileName: string;
+        /**
+         * Denotes if 'resolvedFileName' is isExternalLibraryImport and thus should be a proper external module:
+         * - be a .d.ts file
+         * - use top level imports\exports
+         * - don't use tripleslash references
+         */
         isExternalLibraryImport?: boolean;
     }
+    /**
+     * ResolvedModule with an explicitly provided `extension` property.
+     * Prefer this over `ResolvedModule`.
+     */
+    interface ResolvedModuleFull extends ResolvedModule {
+        /**
+         * Extension of resolvedFileName. This must match what's at the end of resolvedFileName.
+         * This is optional for backwards-compatibility, but will be added if not provided.
+         */
+        extension: Extension;
+    }
+    enum Extension {
+        Ts = ".ts",
+        Tsx = ".tsx",
+        Dts = ".d.ts",
+        Js = ".js",
+        Jsx = ".jsx",
+    }
     interface ResolvedModuleWithFailedLookupLocations {
-        resolvedModule: ResolvedModule;
+        resolvedModule: ResolvedModuleFull | undefined;
         failedLookupLocations: string[];
     }
     interface ResolvedTypeReferenceDirective {
@@ -2253,148 +2948,402 @@ declare namespace ts {
         None = 0,
         TypeScript = 1,
         ContainsTypeScript = 2,
-        Jsx = 4,
-        ContainsJsx = 8,
-        ES7 = 16,
-        ContainsES7 = 32,
-        ES6 = 64,
-        ContainsES6 = 128,
-        DestructuringAssignment = 256,
-        Generator = 512,
-        ContainsGenerator = 1024,
-        ContainsDecorators = 2048,
-        ContainsPropertyInitializer = 4096,
-        ContainsLexicalThis = 8192,
-        ContainsCapturedLexicalThis = 16384,
-        ContainsLexicalThisInComputedPropertyName = 32768,
-        ContainsDefaultValueAssignments = 65536,
-        ContainsParameterPropertyAssignments = 131072,
-        ContainsSpreadElementExpression = 262144,
-        ContainsComputedPropertyName = 524288,
-        ContainsBlockScopedBinding = 1048576,
-        ContainsBindingPattern = 2097152,
-        ContainsYield = 4194304,
-        ContainsHoistedDeclarationOrCompletion = 8388608,
+        ContainsJsx = 4,
+        ContainsESNext = 8,
+        ContainsES2017 = 16,
+        ContainsES2016 = 32,
+        ES2015 = 64,
+        ContainsES2015 = 128,
+        Generator = 256,
+        ContainsGenerator = 512,
+        DestructuringAssignment = 1024,
+        ContainsDestructuringAssignment = 2048,
+        ContainsDecorators = 4096,
+        ContainsPropertyInitializer = 8192,
+        ContainsLexicalThis = 16384,
+        ContainsCapturedLexicalThis = 32768,
+        ContainsLexicalThisInComputedPropertyName = 65536,
+        ContainsDefaultValueAssignments = 131072,
+        ContainsParameterPropertyAssignments = 262144,
+        ContainsSpread = 524288,
+        ContainsObjectSpread = 1048576,
+        ContainsRest = 524288,
+        ContainsObjectRest = 1048576,
+        ContainsComputedPropertyName = 2097152,
+        ContainsBlockScopedBinding = 4194304,
+        ContainsBindingPattern = 8388608,
+        ContainsYield = 16777216,
+        ContainsHoistedDeclarationOrCompletion = 33554432,
+        ContainsDynamicImport = 67108864,
         HasComputedFlags = 536870912,
         AssertTypeScript = 3,
-        AssertJsx = 12,
-        AssertES7 = 48,
-        AssertES6 = 192,
-        AssertGenerator = 1536,
-        NodeExcludes = 536871765,
-        ArrowFunctionExcludes = 550710101,
-        FunctionExcludes = 550726485,
-        ConstructorExcludes = 550593365,
-        MethodOrAccessorExcludes = 550593365,
-        ClassExcludes = 537590613,
-        ModuleExcludes = 546335573,
+        AssertJsx = 4,
+        AssertESNext = 8,
+        AssertES2017 = 16,
+        AssertES2016 = 32,
+        AssertES2015 = 192,
+        AssertGenerator = 768,
+        AssertDestructuringAssignment = 3072,
+        NodeExcludes = 536872257,
+        ArrowFunctionExcludes = 601249089,
+        FunctionExcludes = 601281857,
+        ConstructorExcludes = 601015617,
+        MethodOrAccessorExcludes = 601015617,
+        ClassExcludes = 539358529,
+        ModuleExcludes = 574674241,
         TypeExcludes = -3,
-        ObjectLiteralExcludes = 537430869,
-        ArrayLiteralOrCallOrNewExcludes = 537133909,
-        VariableDeclarationListExcludes = 538968917,
-        ParameterExcludes = 538968917,
-        TypeScriptClassSyntaxMask = 137216,
-        ES6FunctionSyntaxMask = 81920,
+        ObjectLiteralExcludes = 540087617,
+        ArrayLiteralOrCallOrNewExcludes = 537396545,
+        VariableDeclarationListExcludes = 546309441,
+        ParameterExcludes = 536872257,
+        CatchClauseExcludes = 537920833,
+        BindingPatternExcludes = 537396545,
+        TypeScriptClassSyntaxMask = 274432,
+        ES2015FunctionSyntaxMask = 163840,
+    }
+    interface SourceMapRange extends TextRange {
+        source?: SourceMapSource;
+    }
+    interface SourceMapSource {
+        fileName: string;
+        text: string;
+        lineMap: number[];
+        skipTrivia?: (pos: number) => number;
     }
     interface EmitNode {
+        annotatedNodes?: Node[];
         flags?: EmitFlags;
+        leadingComments?: SynthesizedComment[];
+        trailingComments?: SynthesizedComment[];
         commentRange?: TextRange;
-        sourceMapRange?: TextRange;
-        tokenSourceMapRanges?: Map<TextRange>;
-        annotatedNodes?: Node[];
-        constantValue?: number;
+        sourceMapRange?: SourceMapRange;
+        tokenSourceMapRanges?: SourceMapRange[];
+        constantValue?: string | number;
+        externalHelpersModuleName?: Identifier;
+        helpers?: EmitHelper[];
     }
     enum EmitFlags {
-        EmitEmitHelpers = 1,
-        EmitExportStar = 2,
-        EmitSuperHelper = 4,
-        EmitAdvancedSuperHelper = 8,
-        UMDDefine = 16,
-        SingleLine = 32,
-        AdviseOnEmitNode = 64,
-        NoSubstitution = 128,
-        CapturesThis = 256,
-        NoLeadingSourceMap = 512,
-        NoTrailingSourceMap = 1024,
-        NoSourceMap = 1536,
-        NoNestedSourceMaps = 2048,
-        NoTokenLeadingSourceMaps = 4096,
-        NoTokenTrailingSourceMaps = 8192,
-        NoTokenSourceMaps = 12288,
-        NoLeadingComments = 16384,
-        NoTrailingComments = 32768,
-        NoComments = 49152,
-        NoNestedComments = 65536,
-        ExportName = 131072,
-        LocalName = 262144,
-        Indented = 524288,
-        NoIndentation = 1048576,
-        AsyncFunctionBody = 2097152,
-        ReuseTempVariableScope = 4194304,
-        CustomPrologue = 8388608,
-    }
-    enum EmitContext {
+        SingleLine = 1,
+        AdviseOnEmitNode = 2,
+        NoSubstitution = 4,
+        CapturesThis = 8,
+        NoLeadingSourceMap = 16,
+        NoTrailingSourceMap = 32,
+        NoSourceMap = 48,
+        NoNestedSourceMaps = 64,
+        NoTokenLeadingSourceMaps = 128,
+        NoTokenTrailingSourceMaps = 256,
+        NoTokenSourceMaps = 384,
+        NoLeadingComments = 512,
+        NoTrailingComments = 1024,
+        NoComments = 1536,
+        NoNestedComments = 2048,
+        HelperName = 4096,
+        ExportName = 8192,
+        LocalName = 16384,
+        InternalName = 32768,
+        Indented = 65536,
+        NoIndentation = 131072,
+        AsyncFunctionBody = 262144,
+        ReuseTempVariableScope = 524288,
+        CustomPrologue = 1048576,
+        NoHoisting = 2097152,
+        HasEndOfDeclarationMarker = 4194304,
+        Iterator = 8388608,
+        NoAsciiEscaping = 16777216,
+    }
+    interface EmitHelper {
+        readonly name: string;
+        readonly scoped: boolean;
+        readonly text: string;
+        readonly priority?: number;
+    }
+    /**
+     * Used by the checker, this enum keeps track of external emit helpers that should be type
+     * checked.
+     */
+    enum ExternalEmitHelpers {
+        Extends = 1,
+        Assign = 2,
+        Rest = 4,
+        Decorate = 8,
+        Metadata = 16,
+        Param = 32,
+        Awaiter = 64,
+        Generator = 128,
+        Values = 256,
+        Read = 512,
+        Spread = 1024,
+        Await = 2048,
+        AsyncGenerator = 4096,
+        AsyncDelegator = 8192,
+        AsyncValues = 16384,
+        ExportStar = 32768,
+        ForOfIncludes = 256,
+        ForAwaitOfIncludes = 16384,
+        AsyncGeneratorIncludes = 6144,
+        AsyncDelegatorIncludes = 26624,
+        SpreadIncludes = 1536,
+        FirstEmitHelper = 1,
+        LastEmitHelper = 32768,
+    }
+    enum EmitHint {
         SourceFile = 0,
         Expression = 1,
         IdentifierName = 2,
         Unspecified = 3,
     }
-    /** Additional context provided to `visitEachChild` */
-    interface LexicalEnvironment {
+    interface EmitHost extends ScriptReferenceHost {
+        getSourceFiles(): SourceFile[];
+        isSourceFileFromExternalLibrary(file: SourceFile): boolean;
+        getCommonSourceDirectory(): string;
+        getCanonicalFileName(fileName: string): string;
+        getNewLine(): string;
+        isEmitBlocked(emitFileName: string): boolean;
+        writeFile: WriteFileCallback;
+    }
+    interface TransformationContext {
+        getEmitResolver(): EmitResolver;
+        getEmitHost(): EmitHost;
+        /** Gets the compiler options supplied to the transformer. */
+        getCompilerOptions(): CompilerOptions;
         /** Starts a new lexical environment. */
         startLexicalEnvironment(): void;
+        /** Suspends the current lexical environment, usually after visiting a parameter list. */
+        suspendLexicalEnvironment(): void;
+        /** Resumes a suspended lexical environment, usually before visiting a function body. */
+        resumeLexicalEnvironment(): void;
         /** Ends a lexical environment, returning any declarations. */
         endLexicalEnvironment(): Statement[];
+        /** Hoists a function declaration to the containing scope. */
+        hoistFunctionDeclaration(node: FunctionDeclaration): void;
+        /** Hoists a variable declaration to the containing scope. */
+        hoistVariableDeclaration(node: Identifier): void;
+        /** Records a request for a non-scoped emit helper in the current context. */
+        requestEmitHelper(helper: EmitHelper): void;
+        /** Gets and resets the requested non-scoped emit helpers. */
+        readEmitHelpers(): EmitHelper[] | undefined;
+        /** Enables expression substitutions in the pretty printer for the provided SyntaxKind. */
+        enableSubstitution(kind: SyntaxKind): void;
+        /** Determines whether expression substitutions are enabled for the provided node. */
+        isSubstitutionEnabled(node: Node): boolean;
+        /**
+         * Hook used by transformers to substitute expressions just before they
+         * are emitted by the pretty printer.
+         *
+         * NOTE: Transformation hooks should only be modified during `Transformer` initialization,
+         * before returning the `NodeTransformer` callback.
+         */
+        onSubstituteNode: (hint: EmitHint, node: Node) => Node;
+        /**
+         * Enables before/after emit notifications in the pretty printer for the provided
+         * SyntaxKind.
+         */
+        enableEmitNotification(kind: SyntaxKind): void;
+        /**
+         * Determines whether before/after emit notifications should be raised in the pretty
+         * printer when it emits a node.
+         */
+        isEmitNotificationEnabled(node: Node): boolean;
+        /**
+         * Hook used to allow transformers to capture state before or after
+         * the printer emits a node.
+         *
+         * NOTE: Transformation hooks should only be modified during `Transformer` initialization,
+         * before returning the `NodeTransformer` callback.
+         */
+        onEmitNode: (hint: EmitHint, node: Node, emitCallback: (hint: EmitHint, node: Node) => void) => void;
     }
-    interface TextSpan {
-        start: number;
-        length: number;
-    }
-    interface TextChangeRange {
-        span: TextSpan;
-        newLength: number;
-    }
-    interface DiagnosticCollection {
-        add(diagnostic: Diagnostic): void;
-        getGlobalDiagnostics(): Diagnostic[];
-        getDiagnostics(fileName?: string): Diagnostic[];
-        getModificationCount(): number;
-        reattachFileDiagnostics(newFile: SourceFile): void;
-    }
-    interface SyntaxList extends Node {
-        _children: Node[];
+    interface TransformationResult<T extends Node> {
+        /** Gets the transformed source files. */
+        transformed: T[];
+        /** Gets diagnostics for the transformation. */
+        diagnostics?: Diagnostic[];
+        /**
+         * Gets a substitute for a node, if one is available; otherwise, returns the original node.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to substitute.
+         */
+        substituteNode(hint: EmitHint, node: Node): Node;
+        /**
+         * Emits a node with possible notification.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to emit.
+         * @param emitCallback A callback used to emit the node.
+         */
+        emitNodeWithNotification(hint: EmitHint, node: Node, emitCallback: (hint: EmitHint, node: Node) => void): void;
+        /**
+         * Clean up EmitNode entries on any parse-tree nodes.
+         */
+        dispose(): void;
     }
-}
-declare namespace ts {
-    /** Gets a timestamp with (at least) ms resolution */
-    const timestamp: () => number;
-}
-/** Performance measurements for the compiler. */
-declare namespace ts.performance {
     /**
-     * Marks a performance event.
-     *
-     * @param markName The name of the mark.
+     * A function that is used to initialize and return a `Transformer` callback, which in turn
+     * will be used to transform one or more nodes.
      */
-    function mark(markName: string): void;
+    type TransformerFactory<T extends Node> = (context: TransformationContext) => Transformer<T>;
     /**
-     * Adds a performance measurement with the specified name.
-     *
-     * @param measureName The name of the performance measurement.
-     * @param startMarkName The name of the starting mark. If not supplied, the point at which the
-     *      profiler was enabled is used.
-     * @param endMarkName The name of the ending mark. If not supplied, the current timestamp is
-     *      used.
+     * A function that transforms a node.
      */
-    function measure(measureName: string, startMarkName?: string, endMarkName?: string): void;
+    type Transformer<T extends Node> = (node: T) => T;
     /**
-     * Gets the number of times a marker was encountered.
-     *
-     * @param markName The name of the mark.
+     * A function that accepts and possibly transforms a node.
      */
-    function getCount(markName: string): number;
-    /**
-     * Gets the total duration of all measurements with the supplied name.
+    type Visitor = (node: Node) => VisitResult<Node>;
+    type VisitResult<T extends Node> = T | T[];
+    interface Printer {
+        /**
+         * Print a node and its subtree as-is, without any emit transformations.
+         * @param hint A value indicating the purpose of a node. This is primarily used to
+         * distinguish between an `Identifier` used in an expression position, versus an
+         * `Identifier` used as an `IdentifierName` as part of a declaration. For most nodes you
+         * should just pass `Unspecified`.
+         * @param node The node to print. The node and its subtree are printed as-is, without any
+         * emit transformations.
+         * @param sourceFile A source file that provides context for the node. The source text of
+         * the file is used to emit the original source content for literals and identifiers, while
+         * the identifiers of the source file are used when generating unique names to avoid
+         * collisions.
+         */
+        printNode(hint: EmitHint, node: Node, sourceFile: SourceFile): string;
+        /**
+         * Prints a source file as-is, without any emit transformations.
+         */
+        printFile(sourceFile: SourceFile): string;
+        /**
+         * Prints a bundle of source files as-is, without any emit transformations.
+         */
+        printBundle(bundle: Bundle): string;
+        writeNode(hint: EmitHint, node: Node, sourceFile: SourceFile | undefined, writer: EmitTextWriter): void;
+        writeFile(sourceFile: SourceFile, writer: EmitTextWriter): void;
+        writeBundle(bundle: Bundle, writer: EmitTextWriter): void;
+    }
+    interface PrintHandlers {
+        /**
+         * A hook used by the Printer when generating unique names to avoid collisions with
+         * globally defined names that exist outside of the current source file.
+         */
+        hasGlobalName?(name: string): boolean;
+        /**
+         * A hook used by the Printer to provide notifications prior to emitting a node. A
+         * compatible implementation **must** invoke `emitCallback` with the provided `hint` and
+         * `node` values.
+         * @param hint A hint indicating the intended purpose of the node.
+         * @param node The node to emit.
+         * @param emitCallback A callback that, when invoked, will emit the node.
+         * @example
+         * ```ts
+         * var printer = createPrinter(printerOptions, {
+         *   onEmitNode(hint, node, emitCallback) {
+         *     // set up or track state prior to emitting the node...
+         *     emitCallback(hint, node);
+         *     // restore state after emitting the node...
+         *   }
+         * });
+         * ```
+         */
+        onEmitNode?(hint: EmitHint, node: Node, emitCallback: (hint: EmitHint, node: Node) => void): void;
+        /**
+         * A hook used by the Printer to perform just-in-time substitution of a node. This is
+         * primarily used by node transformations that need to substitute one node for another,
+         * such as replacing `myExportedVar` with `exports.myExportedVar`.
+         * @param hint A hint indicating the intended purpose of the node.
+         * @param node The node to emit.
+         * @example
+         * ```ts
+         * var printer = createPrinter(printerOptions, {
+         *   substituteNode(hint, node) {
+         *     // perform substitution if necessary...
+         *     return node;
+         *   }
+         * });
+         * ```
+         */
+        substituteNode?(hint: EmitHint, node: Node): Node;
+        onEmitSourceMapOfNode?: (hint: EmitHint, node: Node, emitCallback: (hint: EmitHint, node: Node) => void) => void;
+        onEmitSourceMapOfToken?: (node: Node, token: SyntaxKind, pos: number, emitCallback: (token: SyntaxKind, pos: number) => number) => number;
+        onEmitSourceMapOfPosition?: (pos: number) => void;
+        onEmitHelpers?: (node: Node, writeLines: (text: string) => void) => void;
+        onSetSourceFile?: (node: SourceFile) => void;
+        onBeforeEmitNodeArray?: (nodes: NodeArray<any>) => void;
+        onAfterEmitNodeArray?: (nodes: NodeArray<any>) => void;
+        onBeforeEmitToken?: (node: Node) => void;
+        onAfterEmitToken?: (node: Node) => void;
+    }
+    interface PrinterOptions {
+        removeComments?: boolean;
+        newLine?: NewLineKind;
+        sourceMap?: boolean;
+        inlineSourceMap?: boolean;
+        extendedDiagnostics?: boolean;
+    }
+    interface EmitTextWriter {
+        write(s: string): void;
+        writeTextOfNode(text: string, node: Node): void;
+        writeLine(): void;
+        increaseIndent(): void;
+        decreaseIndent(): void;
+        getText(): string;
+        rawWrite(s: string): void;
+        writeLiteral(s: string): void;
+        getTextPos(): number;
+        getLine(): number;
+        getColumn(): number;
+        getIndent(): number;
+        isAtStartOfLine(): boolean;
+        reset(): void;
+    }
+    interface TextSpan {
+        start: number;
+        length: number;
+    }
+    interface TextChangeRange {
+        span: TextSpan;
+        newLength: number;
+    }
+    interface DiagnosticCollection {
+        add(diagnostic: Diagnostic): void;
+        getGlobalDiagnostics(): Diagnostic[];
+        getDiagnostics(fileName?: string): Diagnostic[];
+        getModificationCount(): number;
+        reattachFileDiagnostics(newFile: SourceFile): void;
+    }
+    interface SyntaxList extends Node {
+        _children: Node[];
+    }
+}
+declare namespace ts {
+    /** Gets a timestamp with (at least) ms resolution */
+    const timestamp: () => number;
+}
+/** Performance measurements for the compiler. */
+declare namespace ts.performance {
+    /**
+     * Marks a performance event.
+     *
+     * @param markName The name of the mark.
+     */
+    function mark(markName: string): void;
+    /**
+     * Adds a performance measurement with the specified name.
+     *
+     * @param measureName The name of the performance measurement.
+     * @param startMarkName The name of the starting mark. If not supplied, the point at which the
+     *      profiler was enabled is used.
+     * @param endMarkName The name of the ending mark. If not supplied, the current timestamp is
+     *      used.
+     */
+    function measure(measureName: string, startMarkName?: string, endMarkName?: string): void;
+    /**
+     * Gets the number of times a marker was encountered.
+     *
+     * @param markName The name of the mark.
+     */
+    function getCount(markName: string): number;
+    /**
+     * Gets the total duration of all measurements with the supplied name.
      *
      * @param measureName The name of the measure whose durations should be accumulated.
      */
@@ -2410,6 +3359,10 @@ declare namespace ts.performance {
     /** Disables performance measurements for the compiler. */
     function disable(): void;
 }
+declare namespace ts {
+    /** The version of the TypeScript compiler release */
+    const version = "2.5.0";
+}
 declare namespace ts {
     /**
      * Ternary values are defined such that
@@ -2425,7 +3378,13 @@ declare namespace ts {
         Maybe = 1,
         True = -1,
     }
-    function createMap<T>(template?: MapLike<T>): Map<T>;
+    const collator: {
+        compare(a: string, b: string): number;
+    };
+    const localeCompareIsCorrect: boolean;
+    /** Create a new map. If a template object is provided, the map will copy entries from it. */
+    function createMap<T>(): Map<T>;
+    function createMapFromTemplate<T>(template?: MapLike<T>): Map<T>;
     function createFileMap<T>(keyMapper?: (key: string) => string): FileMap<T>;
     function toPath(fileName: string, basePath: string, getCanonicalFileName: (path: string) => string): Path;
     enum Comparison {
@@ -2433,12 +3392,23 @@ declare namespace ts {
         EqualTo = 0,
         GreaterThan = 1,
     }
+    function length(array: any[]): number;
     /**
      * Iterates through 'array' by index and performs the callback on each element of array until the callback
      * returns a truthy value, then returns that value.
      * If no such value is found, the callback is applied to each element of array and undefined is returned.
      */
     function forEach<T, U>(array: T[] | undefined, callback: (element: T, index: number) => U | undefined): U | undefined;
+    /**
+     * Iterates through the parent chain of a node and performs the callback on each parent until the callback
+     * returns a truthy value, then returns that value.
+     * If no such value is found, it applies the callback until the parent pointer is undefined or the callback returns "quit"
+     * At that point findAncestor returns undefined.
+     */
+    function findAncestor<T extends Node>(node: Node, callback: (element: Node) => element is T): T | undefined;
+    function findAncestor(node: Node, callback: (element: Node) => boolean | "quit"): Node | undefined;
+    function zipWith<T, U>(arrayA: T[], arrayB: U[], callback: (a: T, b: U, index: number) => void): void;
+    function zipToMap<T>(keys: string[], values: T[]): Map<T>;
     /**
      * Iterates through `array` by index and performs the callback on each element of array until the callback
      * returns a falsey value, then returns false.
@@ -2447,6 +3417,8 @@ declare namespace ts {
     function every<T>(array: T[], callback: (element: T, index: number) => boolean): boolean;
     /** Works like Array.prototype.find, returning `undefined` if no element satisfying the predicate is found. */
     function find<T>(array: T[], predicate: (element: T, index: number) => boolean): T | undefined;
+    /** Works like Array.prototype.findIndex, returning `-1` if no element satisfying the predicate is found. */
+    function findIndex<T>(array: T[], predicate: (element: T, index: number) => boolean): number;
     /**
      * Returns the first truthy result of `callback`, or else fails.
      * This is like `forEach`, but never returns undefined.
@@ -2465,6 +3437,7 @@ declare namespace ts {
     function removeWhere<T>(array: T[], f: (x: T) => boolean): boolean;
     function filterMutate<T>(array: T[], f: (x: T) => boolean): void;
     function map<T, U>(array: T[], f: (x: T, i: number) => U): U[];
+    function sameMap<T>(array: T[], f: (x: T, i: number) => T): T[];
     /**
      * Flattens an array containing a mix of array or non-array elements.
      *
@@ -2477,7 +3450,16 @@ declare namespace ts {
      * @param array The array to map.
      * @param mapfn The callback used to map the result into one or more values.
      */
-    function flatMap<T, U>(array: T[], mapfn: (x: T, i: number) => U | U[]): U[];
+    function flatMap<T, U>(array: T[] | undefined, mapfn: (x: T, i: number) => U | U[] | undefined): U[] | undefined;
+    /**
+     * Maps an array. If the mapped value is an array, it is spread into the result.
+     * Avoids allocation if all elements map to themselves.
+     *
+     * @param array The array to map.
+     * @param mapfn The callback used to map the result into one or more values.
+     */
+    function sameFlatMap<T>(array: T[], mapfn: (x: T, i: number) => T | T[]): T[];
+    function mapDefined<T, U>(array: ReadonlyArray<T>, mapFn: (x: T, i: number) => U | undefined): U[];
     /**
      * Computes the first matching span of elements and returns a tuple of the first span
      * and the remaining elements.
@@ -2491,23 +3473,71 @@ declare namespace ts {
      * @param mapfn A callback used to map a contiguous chunk of values to a single value.
      */
     function spanMap<T, K, U>(array: T[], keyfn: (x: T, i: number) => K, mapfn: (chunk: T[], key: K, start: number, end: number) => U): U[];
-    function mapObject<T, U>(object: MapLike<T>, f: (key: string, x: T) => [string, U]): MapLike<U>;
+    function mapEntries<T, U>(map: Map<T>, f: (key: string, value: T) => [string, U]): Map<U>;
+    function some<T>(array: T[], predicate?: (value: T) => boolean): boolean;
     function concatenate<T>(array1: T[], array2: T[]): T[];
     function deduplicate<T>(array: T[], areEqual?: (a: T, b: T) => boolean): T[];
+    function arrayIsEqualTo<T>(array1: ReadonlyArray<T>, array2: ReadonlyArray<T>, equaler?: (a: T, b: T) => boolean): boolean;
+    function changesAffectModuleResolution(oldOptions: CompilerOptions, newOptions: CompilerOptions): boolean;
     /**
      * Compacts an array, removing any falsey elements.
      */
     function compact<T>(array: T[]): T[];
+    /**
+     * Gets the relative complement of `arrayA` with respect to `b`, returning the elements that
+     * are not present in `arrayA` but are present in `arrayB`. Assumes both arrays are sorted
+     * based on the provided comparer.
+     */
+    function relativeComplement<T>(arrayA: T[] | undefined, arrayB: T[] | undefined, comparer?: (x: T, y: T) => Comparison, offsetA?: number, offsetB?: number): T[] | undefined;
     function sum(array: any[], prop: string): number;
-    function addRange<T>(to: T[], from: T[]): void;
+    /**
+     * Appends a value to an array, returning the array.
+     *
+     * @param to The array to which `value` is to be appended. If `to` is `undefined`, a new array
+     * is created if `value` was appended.
+     * @param value The value to append to the array. If `value` is `undefined`, nothing is
+     * appended.
+     */
+    function append<T>(to: T[] | undefined, value: T | undefined): T[] | undefined;
+    /**
+     * Appends a range of value to an array, returning the array.
+     *
+     * @param to The array to which `value` is to be appended. If `to` is `undefined`, a new array
+     * is created if `value` was appended.
+     * @param from The values to append to the array. If `from` is `undefined`, nothing is
+     * appended. If an element of `from` is `undefined`, that element is not appended.
+     * @param start The offset in `from` at which to start copying values.
+     * @param end The offset in `from` at which to stop copying values (non-inclusive).
+     */
+    function addRange<T>(to: T[] | undefined, from: T[] | undefined, start?: number, end?: number): T[] | undefined;
+    /**
+     * Stable sort of an array. Elements equal to each other maintain their relative position in the array.
+     */
+    function stableSort<T>(array: T[], comparer?: (x: T, y: T) => Comparison): T[];
     function rangeEquals<T>(array1: T[], array2: T[], pos: number, end: number): boolean;
-    function firstOrUndefined<T>(array: T[]): T;
-    function singleOrUndefined<T>(array: T[]): T;
-    function singleOrMany<T>(array: T[]): T | T[];
     /**
-     * Returns the last element of an array if non-empty, undefined otherwise.
+     * Returns the element at a specific offset in an array if non-empty, `undefined` otherwise.
+     * A negative offset indicates the element should be retrieved from the end of the array.
      */
-    function lastOrUndefined<T>(array: T[]): T;
+    function elementAt<T>(array: T[] | undefined, offset: number): T | undefined;
+    /**
+     * Returns the first element of an array if non-empty, `undefined` otherwise.
+     */
+    function firstOrUndefined<T>(array: T[]): T | undefined;
+    /**
+     * Returns the last element of an array if non-empty, `undefined` otherwise.
+     */
+    function lastOrUndefined<T>(array: T[]): T | undefined;
+    /**
+     * Returns the only element of an array if it contains only one element, `undefined` otherwise.
+     */
+    function singleOrUndefined<T>(array: T[]): T | undefined;
+    /**
+     * Returns the only element of an array if it contains only one element; otheriwse, returns the
+     * array.
+     */
+    function singleOrMany<T>(array: T[]): T | T[];
+    function replaceElement<T>(array: T[], index: number, value: T): T[];
     /**
      * Performs a binary search, finding the index at which 'value' occurs in 'array'.
      * If no such index is found, returns the 2's-complement of first index at which
@@ -2515,7 +3545,7 @@ declare namespace ts {
      * @param array A sorted array whose first element must be no larger than number
      * @param number The value to be searched for in the array.
      */
-    function binarySearch<T>(array: T[], value: T, comparer?: (v1: T, v2: T) => number): number;
+    function binarySearch<T>(array: T[], value: T, comparer?: (v1: T, v2: T) => number, offset?: number): number;
     function reduceLeft<T, U>(array: T[], f: (memo: U, value: T, i: number) => U, initial: U, start?: number, count?: number): U;
     function reduceLeft<T>(array: T[], f: (memo: T, value: T, i: number) => T): T;
     function reduceRight<T, U>(array: T[], f: (memo: U, value: T, i: number) => U, initial: U, start?: number, count?: number): U;
@@ -2523,9 +3553,6 @@ declare namespace ts {
     /**
      * Indicates whether a map-like contains an own property with the specified key.
      *
-     * NOTE: This is intended for use only with MapLike<T> objects. For Map<T> objects, use
-     *       the 'in' operator.
-     *
      * @param map A map-like.
      * @param key A property key.
      */
@@ -2533,9 +3560,6 @@ declare namespace ts {
     /**
      * Gets the value of an owned property in a map-like.
      *
-     * NOTE: This is intended for use only with MapLike<T> objects. For Map<T> objects, use
-     *       an indexer.
-     *
      * @param map A map-like.
      * @param key A property key.
      */
@@ -2549,52 +3573,22 @@ declare namespace ts {
      * @param map A map-like.
      */
     function getOwnKeys<T>(map: MapLike<T>): string[];
+    /** Shims `Array.from`. */
+    function arrayFrom<T, U>(iterator: Iterator<T>, map: (t: T) => U): U[];
+    function arrayFrom<T>(iterator: Iterator<T>): T[];
+    function convertToArray<T, U>(iterator: Iterator<T>, f: (value: T) => U): U[];
     /**
-     * Enumerates the properties of a Map<T>, invoking a callback and returning the first truthy result.
-     *
-     * @param map A map for which properties should be enumerated.
-     * @param callback A callback to invoke for each property.
-     */
-    function forEachProperty<T, U>(map: Map<T>, callback: (value: T, key: string) => U): U;
-    /**
-     * Returns true if a Map<T> has some matching property.
-     *
-     * @param map A map whose properties should be tested.
-     * @param predicate An optional callback used to test each property.
-     */
-    function someProperties<T>(map: Map<T>, predicate?: (value: T, key: string) => boolean): boolean;
-    /**
-     * Performs a shallow copy of the properties from a source Map<T> to a target MapLike<T>
-     *
-     * @param source A map from which properties should be copied.
-     * @param target A map to which properties should be copied.
+     * Calls `callback` for each entry in the map, returning the first truthy result.
+     * Use `map.forEach` instead for normal iteration.
      */
-    function copyProperties<T>(source: Map<T>, target: MapLike<T>): void;
+    function forEachEntry<T, U>(map: Map<T>, callback: (value: T, key: string) => U | undefined): U | undefined;
+    /** `forEachEntry` for just keys. */
+    function forEachKey<T>(map: Map<{}>, callback: (key: string) => T | undefined): T | undefined;
+    /** Copy entries from `source` to `target`. */
+    function copyEntries<T>(source: Map<T>, target: Map<T>): void;
     function assign<T1 extends MapLike<{}>, T2, T3>(t: T1, arg1: T2, arg2: T3): T1 & T2 & T3;
     function assign<T1 extends MapLike<{}>, T2>(t: T1, arg1: T2): T1 & T2;
     function assign<T1 extends MapLike<{}>>(t: T1, ...args: any[]): any;
-    /**
-     * Reduce the properties of a map.
-     *
-     * NOTE: This is intended for use with Map<T> objects. For MapLike<T> objects, use
-     *       reduceOwnProperties instead as it offers better runtime safety.
-     *
-     * @param map The map to reduce
-     * @param callback An aggregation function that is called for each entry in the map
-     * @param initial The initial value for the reduction.
-     */
-    function reduceProperties<T, U>(map: Map<T>, callback: (aggregate: U, value: T, key: string) => U, initial: U): U;
-    /**
-     * Reduce the properties defined on a map-like (but not from its prototype chain).
-     *
-     * NOTE: This is intended for use with MapLike<T> objects. For Map<T> objects, use
-     *       reduceProperties instead as it offers better performance.
-     *
-     * @param map The map-like to reduce
-     * @param callback An aggregation function that is called for each entry in the map
-     * @param initial The initial value for the reduction.
-     */
-    function reduceOwnProperties<T, U>(map: MapLike<T>, callback: (aggregate: U, value: T, key: string) => U, initial: U): U;
     /**
      * Performs a shallow equality comparison of the contents of two map-likes.
      *
@@ -2614,25 +3608,33 @@ declare namespace ts {
      */
     function arrayToMap<T>(array: T[], makeKey: (value: T) => string): Map<T>;
     function arrayToMap<T, U>(array: T[], makeKey: (value: T) => string, makeValue: (value: T) => U): Map<U>;
-    function isEmpty<T>(map: Map<T>): boolean;
     function cloneMap<T>(map: Map<T>): Map<T>;
     function clone<T>(object: T): T;
     function extend<T1, T2>(first: T1, second: T2): T1 & T2;
-    /**
-     * Adds the value to an array of values associated with the key, and returns the array.
-     * Creates the array if it does not already exist.
-     */
-    function multiMapAdd<V>(map: Map<V[]>, key: string, value: V): V[];
-    /**
-     * Removes a value from an array of values associated with the key.
-     * Does not preserve the order of those values.
-     * Does nothing if `key` is not in `map`, or `value` is not in `map[key]`.
-     */
-    function multiMapRemove<V>(map: Map<V[]>, key: string, value: V): void;
+    interface MultiMap<T> extends Map<T[]> {
+        /**
+         * Adds the value to an array of values associated with the key, and returns the array.
+         * Creates the array if it does not already exist.
+         */
+        add(key: string, value: T): T[];
+        /**
+         * Removes a value from an array of values associated with the key.
+         * Does not preserve the order of those values.
+         * Does nothing if `key` is not in `map`, or `value` is not in `map[key]`.
+         */
+        remove(key: string, value: T): void;
+    }
+    function createMultiMap<T>(): MultiMap<T>;
     /**
      * Tests whether a value is an array.
      */
     function isArray(value: any): value is any[];
+    function tryCast<TOut extends TIn, TIn = any>(value: TIn | undefined, test: (value: TIn) => value is TOut): TOut | undefined;
+    function cast<TOut extends TIn, TIn = any>(value: TIn | undefined, test: (value: TIn) => value is TOut): TOut;
+    /** Does nothing. */
+    function noop(): void;
+    /** Throws an error because a function is not implemented. */
+    function notImplemented(): never;
     function memoize<T>(callback: () => T): () => T;
     /**
      * High-order function, creates a function that executes a function composition.
@@ -2648,11 +3650,15 @@ declare namespace ts {
      * @param args The functions to compose.
      */
     function compose<T>(...args: ((t: T) => T)[]): (t: T) => T;
-    let localizedDiagnosticMessages: Map<string>;
+    function formatStringFromArgs(text: string, args: {
+        [index: number]: string;
+    }, baseIndex?: number): string;
+    let localizedDiagnosticMessages: MapLike<string>;
     function getLocaleSpecificMessage(message: DiagnosticMessage): string;
-    function createFileDiagnostic(file: SourceFile, start: number, length: number, message: DiagnosticMessage, ...args: any[]): Diagnostic;
-    function formatMessage(dummy: any, message: DiagnosticMessage): string;
-    function createCompilerDiagnostic(message: DiagnosticMessage, ...args: any[]): Diagnostic;
+    function createFileDiagnostic(file: SourceFile, start: number, length: number, message: DiagnosticMessage, ...args: (string | number)[]): Diagnostic;
+    function formatMessage(_dummy: any, message: DiagnosticMessage): string;
+    function createCompilerDiagnostic(message: DiagnosticMessage, ...args: (string | number)[]): Diagnostic;
+    function createCompilerDiagnosticFromMessageChain(chain: DiagnosticMessageChain): Diagnostic;
     function chainDiagnosticMessages(details: DiagnosticMessageChain, message: DiagnosticMessage, ...args: any[]): DiagnosticMessageChain;
     function concatenateDiagnosticMessageChains(headChain: DiagnosticMessageChain, tailChain: DiagnosticMessageChain): DiagnosticMessageChain;
     function compareValues<T>(a: T, b: T): Comparison;
@@ -2662,17 +3668,31 @@ declare namespace ts {
     function sortAndDeduplicateDiagnostics(diagnostics: Diagnostic[]): Diagnostic[];
     function deduplicateSortedDiagnostics(diagnostics: Diagnostic[]): Diagnostic[];
     function normalizeSlashes(path: string): string;
+    /**
+     * Returns length of path root (i.e. length of "/", "x:/", "//server/share/, file:///user/files")
+     */
     function getRootLength(path: string): number;
+    /**
+     * Internally, we represent paths as strings with '/' as the directory separator.
+     * When we make system calls (eg: LanguageServiceHost.getDirectory()),
+     * we expect the host to correctly handle paths in our specified format.
+     */
     const directorySeparator = "/";
     function normalizePath(path: string): string;
     /** A path ending with '/' refers to a directory only, never a file. */
     function pathEndsWithDirectorySeparator(path: string): boolean;
+    /**
+     * Returns the path except for its basename. Eg:
+     *
+     * /path/to/file.ext -> /path/to
+     */
     function getDirectoryPath(path: Path): Path;
     function getDirectoryPath(path: string): string;
     function isUrl(path: string): boolean;
     function isExternalModuleNameRelative(moduleName: string): boolean;
     function getEmitScriptTarget(compilerOptions: CompilerOptions): ScriptTarget;
     function getEmitModuleKind(compilerOptions: CompilerOptions): ModuleKind;
+    function getEmitModuleResolutionKind(compilerOptions: CompilerOptions): ModuleResolutionKind;
     function hasZeroOrOneAsteriskCharacter(str: string): boolean;
     function isRootedDiskPath(path: string): boolean;
     function convertToRelativePath(absoluteOrRelativePath: string, basePath: string, getCanonicalFileName: (path: string) => string): string;
@@ -2695,35 +3715,45 @@ declare namespace ts {
     function comparePaths(a: string, b: string, currentDirectory: string, ignoreCase?: boolean): Comparison;
     function containsPath(parent: string, child: string, currentDirectory: string, ignoreCase?: boolean): boolean;
     function startsWith(str: string, prefix: string): boolean;
+    function removePrefix(str: string, prefix: string): string;
     function endsWith(str: string, suffix: string): boolean;
+    function hasExtension(fileName: string): boolean;
     function fileExtensionIs(path: string, extension: string): boolean;
-    function fileExtensionIsAny(path: string, extensions: string[]): boolean;
-    function getRegularExpressionForWildcard(specs: string[], basePath: string, usage: "files" | "directories" | "exclude"): string;
+    function fileExtensionIsOneOf(path: string, extensions: string[]): boolean;
+    function getRegularExpressionForWildcard(specs: string[], basePath: string, usage: "files" | "directories" | "exclude"): string | undefined;
+    /**
+     * An "includes" path "foo" is implicitly a glob "foo/** /*" (without the space) if its last component has no extension,
+     * and does not contain any glob characters itself.
+     */
+    function isImplicitGlob(lastPathComponent: string): boolean;
     interface FileSystemEntries {
         files: string[];
         directories: string[];
     }
     interface FileMatcherPatterns {
+        /** One pattern for each "include" spec. */
+        includeFilePatterns: string[];
+        /** One pattern matching one of any of the "include" specs. */
         includeFilePattern: string;
         includeDirectoryPattern: string;
         excludePattern: string;
         basePaths: string[];
     }
-    function getFileMatcherPatterns(path: string, extensions: string[], excludes: string[], includes: string[], useCaseSensitiveFileNames: boolean, currentDirectory: string): FileMatcherPatterns;
+    function getFileMatcherPatterns(path: string, excludes: string[], includes: string[], useCaseSensitiveFileNames: boolean, currentDirectory: string): FileMatcherPatterns;
     function matchFiles(path: string, extensions: string[], excludes: string[], includes: string[], useCaseSensitiveFileNames: boolean, currentDirectory: string, getFileSystemEntries: (path: string) => FileSystemEntries): string[];
     function ensureScriptKind(fileName: string, scriptKind?: ScriptKind): ScriptKind;
     function getScriptKindFromFileName(fileName: string): ScriptKind;
     /**
      *  List of supported extensions in order of file resolution precedence.
      */
-    const supportedTypeScriptExtensions: string[];
+    const supportedTypeScriptExtensions: Extension[];
     /** Must have ".d.ts" first because if ".ts" goes first, that will be detected as the extension instead of ".d.ts". */
-    const supportedTypescriptExtensionsForExtractExtension: string[];
-    const supportedJavascriptExtensions: string[];
-    function getSupportedExtensions(options?: CompilerOptions): string[];
+    const supportedTypescriptExtensionsForExtractExtension: Extension[];
+    const supportedJavascriptExtensions: Extension[];
+    function getSupportedExtensions(options?: CompilerOptions, extraFileExtensions?: JsFileExtensionInfo[]): string[];
     function hasJavaScriptFileExtension(fileName: string): boolean;
     function hasTypeScriptFileExtension(fileName: string): boolean;
-    function isSupportedSourceFileName(fileName: string, compilerOptions?: CompilerOptions): boolean;
+    function isSupportedSourceFileName(fileName: string, compilerOptions?: CompilerOptions, extraFileExtensions?: JsFileExtensionInfo[]): boolean;
     /**
      * Extension boundaries by priority. Lower numbers indicate higher priorities, and are
      * aligned to the offset of the highest priority extension in the
@@ -2732,7 +3762,6 @@ declare namespace ts {
     enum ExtensionPriority {
         TypeScriptFiles = 0,
         DeclarationAndJavaScriptFiles = 2,
-        Limit = 5,
         Highest = 0,
         Lowest = 2,
     }
@@ -2740,24 +3769,24 @@ declare namespace ts {
     /**
      * Adjusts an extension priority to be the highest priority within the same range.
      */
-    function adjustExtensionPriority(extensionPriority: ExtensionPriority): ExtensionPriority;
+    function adjustExtensionPriority(extensionPriority: ExtensionPriority, supportedExtensions: string[]): ExtensionPriority;
     /**
      * Gets the next lowest extension priority for a given priority.
      */
-    function getNextLowestExtensionPriority(extensionPriority: ExtensionPriority): ExtensionPriority;
+    function getNextLowestExtensionPriority(extensionPriority: ExtensionPriority, supportedExtensions: string[]): ExtensionPriority;
     function removeFileExtension(path: string): string;
     function tryRemoveExtension(path: string, extension: string): string | undefined;
     function removeExtension(path: string, extension: string): string;
-    function isJsxOrTsxExtension(ext: string): boolean;
     function changeExtension<T extends string | Path>(path: T, newExtension: string): T;
     interface ObjectAllocator {
         getNodeConstructor(): new (kind: SyntaxKind, pos?: number, end?: number) => Node;
-        getTokenConstructor(): new (kind: SyntaxKind, pos?: number, end?: number) => Token;
-        getIdentifierConstructor(): new (kind: SyntaxKind, pos?: number, end?: number) => Token;
-        getSourceFileConstructor(): new (kind: SyntaxKind, pos?: number, end?: number) => SourceFile;
+        getTokenConstructor(): new <TKind extends SyntaxKind>(kind: TKind, pos?: number, end?: number) => Token<TKind>;
+        getIdentifierConstructor(): new (kind: SyntaxKind.Identifier, pos?: number, end?: number) => Identifier;
+        getSourceFileConstructor(): new (kind: SyntaxKind.SourceFile, pos?: number, end?: number) => SourceFile;
         getSymbolConstructor(): new (flags: SymbolFlags, name: string) => Symbol;
         getTypeConstructor(): new (checker: TypeChecker, flags: TypeFlags) => Type;
         getSignatureConstructor(): new (checker: TypeChecker) => Signature;
+        getSourceMapSourceConstructor(): new (fileName: string, text: string, skipTrivia?: (pos: number) => number) => SourceMapSource;
     }
     let objectAllocator: ObjectAllocator;
     enum AssertionLevel {
@@ -2767,12 +3796,16 @@ declare namespace ts {
         VeryAggressive = 3,
     }
     namespace Debug {
+        let currentAssertionLevel: AssertionLevel;
+        let isDebugging: boolean;
         function shouldAssert(level: AssertionLevel): boolean;
-        function assert(expression: boolean, message?: string, verboseDebugInfo?: () => string): void;
-        function fail(message?: string): void;
+        function assert(expression: boolean, message?: string, verboseDebugInfo?: () => string, stackCrawlMark?: Function): void;
+        function fail(message?: string, stackCrawlMark?: Function): void;
+        function getFunctionName(func: Function): any;
     }
-    function getEnvironmentVariable(name: string, host?: CompilerHost): string;
     /** Remove an item from an array, moving everything to its right one space left. */
+    function orderedRemoveItem<T>(array: T[], item: T): boolean;
+    /** Remove an item by index from an array, moving everything to its right one space left. */
     function orderedRemoveItemAt<T>(array: T[], index: number): void;
     function unorderedRemoveItemAt<T>(array: T[], index: number): void;
     /** Remove the *first* occurrence of `item` from the array. */
@@ -2794,7 +3827,18 @@ declare namespace ts {
     function findBestPatternMatch<T>(values: T[], getPattern: (value: T) => Pattern, candidate: string): T | undefined;
     function tryParsePattern(pattern: string): Pattern | undefined;
     function positionIsSynthesized(pos: number): boolean;
+    /** True if an extension is one of the supported TypeScript extensions. */
+    function extensionIsTypeScript(ext: Extension): boolean;
+    /**
+     * Gets the extension from a path.
+     * Path must have a valid extension.
+     */
+    function extensionFromPath(path: string): Extension;
+    function tryGetExtensionFromPath(path: string): Extension | undefined;
+    function isCheckJsEnabledForFile(sourceFile: SourceFile, compilerOptions: CompilerOptions): boolean;
 }
+declare function setTimeout(handler: (...args: any[]) => void, timeout: number): any;
+declare function clearTimeout(handle: any): void;
 declare namespace ts {
     type FileWatcherCallback = (fileName: string, removed?: boolean) => void;
     type DirectoryWatcherCallback = (fileName: string) => void;
@@ -2811,7 +3855,11 @@ declare namespace ts {
         readFile(path: string, encoding?: string): string;
         getFileSize?(path: string): number;
         writeFile(path: string, data: string, writeByteOrderMark?: boolean): void;
-        watchFile?(path: string, callback: FileWatcherCallback): FileWatcher;
+        /**
+         * @pollingInterval - this parameter is used in polling-based watchers and ignored in watchers that
+         * use native OS file watching
+         */
+        watchFile?(path: string, callback: FileWatcherCallback, pollingInterval?: number): FileWatcher;
         watchDirectory?(path: string, callback: DirectoryWatcherCallback, recursive?: boolean): FileWatcher;
         resolvePath(path: string): string;
         fileExists(path: string): boolean;
@@ -2822,12 +3870,19 @@ declare namespace ts {
         getDirectories(path: string): string[];
         readDirectory(path: string, extensions?: string[], exclude?: string[], include?: string[]): string[];
         getModifiedTime?(path: string): Date;
+        /**
+         * This should be cryptographically secure.
+         * A good implementation is node.js' `crypto.createHash`. (https://nodejs.org/api/crypto.html#crypto_crypto_createhash_algorithm)
+         */
         createHash?(data: string): string;
         getMemoryUsage?(): number;
         exit(exitCode?: number): void;
         realpath?(path: string): string;
         getEnvironmentVariable(name: string): string;
         tryEnableSourceMapsForHost?(): void;
+        debugMode?: boolean;
+        setTimeout?(callback: (...args: any[]) => void, ms: number, ...args: any[]): any;
+        clearTimeout?(timeoutId: any): void;
     }
     interface FileWatcher {
         close(): void;
@@ -2836,7 +3891,8 @@ declare namespace ts {
         directoryName: string;
         referenceCount: number;
     }
-    var sys: System;
+    function getNodeMajorVersion(): number;
+    let sys: System;
 }
 declare namespace ts {
     const externalHelpersModuleNameText = "tslib";
@@ -2846,113 +3902,117 @@ declare namespace ts {
         isNoDefaultLib?: boolean;
         isTypeReferenceDirective?: boolean;
     }
-    function getDeclarationOfKind(symbol: Symbol, kind: SyntaxKind): Declaration;
+    function getDeclarationOfKind<T extends Declaration>(symbol: Symbol, kind: T["kind"]): T;
+    function findDeclaration<T extends Declaration>(symbol: Symbol, predicate: (node: Declaration) => node is T): T | undefined;
+    function findDeclaration(symbol: Symbol, predicate: (node: Declaration) => boolean): Declaration | undefined;
     interface StringSymbolWriter extends SymbolWriter {
         string(): string;
     }
-    interface EmitHost extends ScriptReferenceHost {
-        getSourceFiles(): SourceFile[];
-        isSourceFileFromExternalLibrary(file: SourceFile): boolean;
-        getCommonSourceDirectory(): string;
-        getCanonicalFileName(fileName: string): string;
-        getNewLine(): string;
-        isEmitBlocked(emitFileName: string): boolean;
-        writeFile: WriteFileCallback;
-    }
     function getSingleLineStringWriter(): StringSymbolWriter;
     function releaseStringWriter(writer: StringSymbolWriter): void;
     function getFullWidth(node: Node): number;
-    function arrayIsEqualTo<T>(array1: ReadonlyArray<T>, array2: ReadonlyArray<T>, equaler?: (a: T, b: T) => boolean): boolean;
     function hasResolvedModule(sourceFile: SourceFile, moduleNameText: string): boolean;
-    function getResolvedModule(sourceFile: SourceFile, moduleNameText: string): ResolvedModule;
-    function setResolvedModule(sourceFile: SourceFile, moduleNameText: string, resolvedModule: ResolvedModule): void;
+    function getResolvedModule(sourceFile: SourceFile, moduleNameText: string): ResolvedModuleFull;
+    function setResolvedModule(sourceFile: SourceFile, moduleNameText: string, resolvedModule: ResolvedModuleFull): void;
     function setResolvedTypeReferenceDirective(sourceFile: SourceFile, typeReferenceDirectiveName: string, resolvedTypeReferenceDirective: ResolvedTypeReferenceDirective): void;
-    function moduleResolutionIsEqualTo(oldResolution: ResolvedModule, newResolution: ResolvedModule): boolean;
+    function moduleResolutionIsEqualTo(oldResolution: ResolvedModuleFull, newResolution: ResolvedModuleFull): boolean;
     function typeDirectiveIsEqualTo(oldResolution: ResolvedTypeReferenceDirective, newResolution: ResolvedTypeReferenceDirective): boolean;
     function hasChangesInResolutions<T>(names: string[], newResolutions: T[], oldResolutions: Map<T>, comparer: (oldResolution: T, newResolution: T) => boolean): boolean;
     function containsParseError(node: Node): boolean;
     function getSourceFileOfNode(node: Node): SourceFile;
     function isStatementWithLocals(node: Node): boolean;
-    function getStartPositionOfLine(line: number, sourceFile: SourceFile): number;
+    function getStartPositionOfLine(line: number, sourceFile: SourceFileLike): number;
     function nodePosToString(node: Node): string;
     function getStartPosOfNode(node: Node): number;
     function isDefined(value: any): boolean;
-    function getEndLinePosition(line: number, sourceFile: SourceFile): number;
+    function getEndLinePosition(line: number, sourceFile: SourceFileLike): number;
     function nodeIsMissing(node: Node): boolean;
     function nodeIsPresent(node: Node): boolean;
-    function getTokenPosOfNode(node: Node, sourceFile?: SourceFile, includeJsDocComment?: boolean): number;
-    function isJSDocNode(node: Node): boolean;
-    function isJSDocTag(node: Node): boolean;
-    function getNonDecoratorTokenPosOfNode(node: Node, sourceFile?: SourceFile): number;
+    function getTokenPosOfNode(node: Node, sourceFile?: SourceFileLike, includeJsDoc?: boolean): number;
+    function getNonDecoratorTokenPosOfNode(node: Node, sourceFile?: SourceFileLike): number;
     function getSourceTextOfNodeFromSourceFile(sourceFile: SourceFile, node: Node, includeTrivia?: boolean): string;
     function getTextOfNodeFromSourceText(sourceText: string, node: Node): string;
     function getTextOfNode(node: Node, includeTrivia?: boolean): string;
-    function getLiteralText(node: LiteralLikeNode, sourceFile: SourceFile, languageVersion: ScriptTarget): string;
-    function isBinaryOrOctalIntegerLiteral(node: LiteralLikeNode, text: string): boolean;
+    /**
+     * Gets flags that control emit behavior of a node.
+     */
+    function getEmitFlags(node: Node): EmitFlags | undefined;
+    function getLiteralText(node: LiteralLikeNode, sourceFile: SourceFile): string;
+    function getTextOfConstantValue(value: string | number): string;
     function escapeIdentifier(identifier: string): string;
-    function unescapeIdentifier(identifier: string): string;
     function makeIdentifierFromModuleName(moduleName: string): string;
     function isBlockOrCatchScoped(declaration: Declaration): boolean;
+    function isCatchClauseVariableDeclarationOrBindingElement(declaration: Declaration): boolean;
     function isAmbientModule(node: Node): boolean;
+    /** Given a symbol for a module, checks that it is a shorthand ambient module. */
     function isShorthandAmbientModuleSymbol(moduleSymbol: Symbol): boolean;
     function isBlockScopedContainerTopLevel(node: Node): boolean;
     function isGlobalScopeAugmentation(module: ModuleDeclaration): boolean;
     function isExternalModuleAugmentation(node: Node): boolean;
+    function isEffectiveExternalModule(node: SourceFile, compilerOptions: CompilerOptions): boolean;
     function isBlockScope(node: Node, parentNode: Node): boolean;
     function getEnclosingBlockScopeContainer(node: Node): Node;
-    function isCatchClauseVariableDeclaration(declaration: Declaration): boolean;
     function declarationNameToString(name: DeclarationName): string;
-    function createDiagnosticForNode(node: Node, message: DiagnosticMessage, arg0?: any, arg1?: any, arg2?: any): Diagnostic;
+    function getNameFromIndexInfo(info: IndexInfo): string | undefined;
+    function getTextOfPropertyName(name: PropertyName): string;
+    function entityNameToString(name: EntityNameOrEntityNameExpression): string;
+    function createDiagnosticForNode(node: Node, message: DiagnosticMessage, arg0?: string | number, arg1?: string | number, arg2?: string | number): Diagnostic;
+    function createDiagnosticForNodeInSourceFile(sourceFile: SourceFile, node: Node, message: DiagnosticMessage, arg0?: string | number, arg1?: string | number, arg2?: string | number): Diagnostic;
     function createDiagnosticForNodeFromMessageChain(node: Node, messageChain: DiagnosticMessageChain): Diagnostic;
     function getSpanOfTokenAtPosition(sourceFile: SourceFile, pos: number): TextSpan;
     function getErrorSpanForNode(sourceFile: SourceFile, node: Node): TextSpan;
     function isExternalOrCommonJsModule(file: SourceFile): boolean;
-    function isDeclarationFile(file: SourceFile): boolean;
     function isConstEnumDeclaration(node: Node): boolean;
     function isConst(node: Node): boolean;
     function isLet(node: Node): boolean;
-    function isSuperCallExpression(n: Node): boolean;
-    function isPrologueDirective(node: Node): boolean;
+    function isSuperCall(n: Node): n is SuperCall;
+    function isImportCall(n: Node): n is ImportCall;
+    function isPrologueDirective(node: Node): node is PrologueDirective;
     function getLeadingCommentRangesOfNode(node: Node, sourceFileOfNode: SourceFile): CommentRange[];
     function getLeadingCommentRangesOfNodeFromText(node: Node, text: string): CommentRange[];
-    function getJsDocComments(node: Node, sourceFileOfNode: SourceFile): CommentRange[];
-    function getJsDocCommentsFromText(node: Node, text: string): CommentRange[];
+    function getJSDocCommentRanges(node: Node, text: string): CommentRange[];
     let fullTripleSlashReferencePathRegEx: RegExp;
     let fullTripleSlashReferenceTypeReferenceDirectiveRegEx: RegExp;
     let fullTripleSlashAMDReferencePathRegEx: RegExp;
     function isPartOfTypeNode(node: Node): boolean;
+    function isChildOfNodeWithKind(node: Node, kind: SyntaxKind): boolean;
     function forEachReturnStatement<T>(body: Block, visitor: (stmt: ReturnStatement) => T): T;
     function forEachYieldExpression(body: Block, visitor: (expr: YieldExpression) => void): void;
+    /**
+     * Gets the most likely element type for a TypeNode. This is not an exhaustive test
+     * as it assumes a rest argument can only be an array type (either T[], or Array<T>).
+     *
+     * @param node The type node.
+     */
+    function getRestParameterElementType(node: TypeNode): TypeNode;
     function isVariableLike(node: Node): node is VariableLikeDeclaration;
-    function isAccessor(node: Node): node is AccessorDeclaration;
-    function isClassLike(node: Node): node is ClassLikeDeclaration;
-    function isFunctionLike(node: Node): node is FunctionLikeDeclaration;
-    function isFunctionLikeKind(kind: SyntaxKind): boolean;
     function introducesArgumentsExoticObject(node: Node): boolean;
-    function isIterationStatement(node: Node, lookInLabeledStatements: boolean): node is IterationStatement;
+    function unwrapInnermostStatementOfLabel(node: LabeledStatement, beforeUnwrapLabelCallback?: (node: LabeledStatement) => void): Statement;
     function isFunctionBlock(node: Node): boolean;
     function isObjectLiteralMethod(node: Node): node is MethodDeclaration;
+    function isObjectLiteralOrClassExpressionMethod(node: Node): node is MethodDeclaration;
     function isIdentifierTypePredicate(predicate: TypePredicate): predicate is IdentifierTypePredicate;
     function isThisTypePredicate(predicate: TypePredicate): predicate is ThisTypePredicate;
+    function getPropertyAssignment(objectLiteral: ObjectLiteralExpression, key: string, key2?: string): PropertyAssignment[];
     function getContainingFunction(node: Node): FunctionLikeDeclaration;
     function getContainingClass(node: Node): ClassLikeDeclaration;
     function getThisContainer(node: Node, includeArrowFunctions: boolean): Node;
-    /**
-      * Given an super call/property node, returns the closest node where
-      * - a super call/property access is legal in the node and not legal in the parent node the node.
-      *   i.e. super call is legal in constructor but not legal in the class body.
-      * - the container is an arrow function (so caller might need to call getSuperContainer again in case it needs to climb higher)
-      * - a super call/property is definitely illegal in the container (but might be legal in some subnode)
-      *   i.e. super property access is illegal in function declaration but can be legal in the statement list
-      */
+    function getNewTargetContainer(node: Node): Node;
+    /**
+     * Given an super call/property node, returns the closest node where
+     * - a super call/property access is legal in the node and not legal in the parent node the node.
+     *   i.e. super call is legal in constructor but not legal in the class body.
+     * - the container is an arrow function (so caller might need to call getSuperContainer again in case it needs to climb higher)
+     * - a super call/property is definitely illegal in the container (but might be legal in some subnode)
+     *   i.e. super property access is illegal in function declaration but can be legal in the statement list
+     */
     function getSuperContainer(node: Node, stopOnFunctions: boolean): Node;
     function getImmediatelyInvokedFunctionExpression(func: Node): CallExpression;
     /**
      * Determines whether a node is a property or element access expression for super.
      */
-    function isSuperProperty(node: Node): node is (PropertyAccessExpression | ElementAccessExpression);
+    function isSuperProperty(node: Node): node is SuperProperty;
     function getEntityNameFromTypeNode(node: TypeNode): EntityNameOrEntityNameExpression;
-    function isCallLikeExpression(node: Node): node is CallLikeExpression;
     function getInvokedExpression(node: CallLikeExpression): Expression;
     function nodeCanBeDecorated(node: Node): boolean;
     function nodeIsDecorated(node: Node): boolean;
@@ -2960,7 +4020,6 @@ declare namespace ts {
     function childIsDecorated(node: Node): boolean;
     function isJSXTagName(node: Node): boolean;
     function isPartOfExpression(node: Node): boolean;
-    function isInstantiatedModule(node: ModuleDeclaration, preserveConstEnums: boolean): boolean;
     function isExternalModuleImportEqualsDeclaration(node: Node): boolean;
     function getExternalModuleImportEqualsDeclarationExpression(node: Node): Expression;
     function isInternalModuleImportEqualsDeclaration(node: Node): node is ImportEqualsDeclaration;
@@ -2968,35 +4027,56 @@ declare namespace ts {
     function isInJavaScriptFile(node: Node): boolean;
     /**
      * Returns true if the node is a CallExpression to the identifier 'require' with
-     * exactly one argument.
+     * exactly one argument (of the form 'require("name")').
      * This function does not test if the node is in a JavaScript file or not.
-    */
-    function isRequireCall(expression: Node, checkArgumentIsStringLiteral: boolean): expression is CallExpression;
+     */
+    function isRequireCall(callExpression: Node, checkArgumentIsStringLiteral: boolean): callExpression is CallExpression;
     function isSingleOrDoubleQuote(charCode: number): boolean;
     /**
      * Returns true if the node is a variable declaration whose initializer is a function expression.
      * This function does not test if the node is in a JavaScript file or not.
      */
-    function isDeclarationOfFunctionExpression(s: Symbol): boolean;
-    function getSpecialPropertyAssignmentKind(expression: Node): SpecialPropertyAssignmentKind;
+    function isDeclarationOfFunctionOrClassExpression(s: Symbol): boolean;
+    function getRightMostAssignedExpression(node: Node): Node;
+    function isExportsIdentifier(node: Node): boolean;
+    function isModuleExportsPropertyAccessExpression(node: Node): boolean;
+    function getSpecialPropertyAssignmentKind(expression: ts.BinaryExpression): SpecialPropertyAssignmentKind;
     function getExternalModuleName(node: Node): Expression;
-    function getNamespaceDeclarationNode(node: ImportDeclaration | ImportEqualsDeclaration | ExportDeclaration): NamespaceImport;
+    function getNamespaceDeclarationNode(node: ImportDeclaration | ImportEqualsDeclaration | ExportDeclaration): ImportEqualsDeclaration | NamespaceImport;
     function isDefaultImport(node: ImportDeclaration | ImportEqualsDeclaration | ExportDeclaration): boolean;
     function hasQuestionToken(node: Node): boolean;
     function isJSDocConstructSignature(node: Node): boolean;
-    function getJSDocComments(node: Node, checkParentVariableStatement: boolean): string[];
-    function getJSDocTypeTag(node: Node): JSDocTypeTag;
+    function getCommentsFromJSDoc(node: Node): string[];
+    function hasJSDocParameterTags(node: FunctionLikeDeclaration | SignatureDeclaration): boolean;
+    function getJSDocs(node: Node): (JSDoc | JSDocTag)[];
+    function getJSDocParameterTags(param: ParameterDeclaration): JSDocParameterTag[];
+    /** Does the opposite of `getJSDocParameterTags`: given a JSDoc parameter, finds the parameter corresponding to it. */
+    function getParameterFromJSDoc(node: JSDocParameterTag): ParameterDeclaration | undefined;
+    function getTypeParameterFromJsDoc(node: TypeParameterDeclaration & {
+        parent: JSDocTemplateTag;
+    }): TypeParameterDeclaration | undefined;
+    function getJSDocType(node: Node): JSDocType;
+    function getJSDocAugmentsTag(node: Node): JSDocAugmentsTag;
+    function getJSDocClassTag(node: Node): JSDocClassTag;
     function getJSDocReturnTag(node: Node): JSDocReturnTag;
+    function getJSDocReturnType(node: Node): JSDocType;
     function getJSDocTemplateTag(node: Node): JSDocTemplateTag;
-    function getCorrespondingJSDocParameterTag(parameter: ParameterDeclaration): JSDocParameterTag;
     function hasRestParameter(s: SignatureDeclaration): boolean;
     function hasDeclaredRestParameter(s: SignatureDeclaration): boolean;
     function isRestParameter(node: ParameterDeclaration): boolean;
     function isDeclaredRestParam(node: ParameterDeclaration): boolean;
+    enum AssignmentKind {
+        None = 0,
+        Definite = 1,
+        Compound = 2,
+    }
+    function getAssignmentTargetKind(node: Node): AssignmentKind;
     function isAssignmentTarget(node: Node): boolean;
+    function isDeleteTarget(node: Node): boolean;
     function isNodeDescendantOf(node: Node, ancestor: Node): boolean;
     function isInAmbientContext(node: Node): boolean;
     function isDeclarationName(name: Node): boolean;
+    function isAnyDeclarationName(name: Node): boolean;
     function isLiteralComputedPropertyDeclarationName(node: Node): boolean;
     function isIdentifierName(node: Identifier): boolean;
     function isAliasSymbolDeclaration(node: Node): boolean;
@@ -3006,12 +4086,20 @@ declare namespace ts {
     function getInterfaceBaseTypeNodes(node: InterfaceDeclaration): NodeArray<ExpressionWithTypeArguments>;
     function getHeritageClause(clauses: NodeArray<HeritageClause>, kind: SyntaxKind): HeritageClause;
     function tryResolveScriptReference(host: ScriptReferenceHost, sourceFile: SourceFile, reference: FileReference): SourceFile;
-    function getAncestor(node: Node, kind: SyntaxKind): Node;
+    function getAncestor(node: Node | undefined, kind: SyntaxKind): Node | undefined;
     function getFileReferenceFromReferencePath(comment: string, commentRange: CommentRange): ReferencePathMatchResult;
     function isKeyword(token: SyntaxKind): boolean;
     function isTrivia(token: SyntaxKind): boolean;
-    function isAsyncFunctionLike(node: Node): boolean;
-    function isStringOrNumericLiteral(kind: SyntaxKind): boolean;
+    enum FunctionFlags {
+        Normal = 0,
+        Generator = 1,
+        Async = 2,
+        Invalid = 4,
+        AsyncGenerator = 3,
+    }
+    function getFunctionFlags(node: FunctionLikeDeclaration | undefined): FunctionFlags;
+    function isAsyncFunction(node: Node): boolean;
+    function isStringOrNumericLiteral(node: Node): node is StringLiteral | NumericLiteral;
     /**
      * A declaration has a dynamic name if both of the following are true:
      *   1. The declaration has a computed property name
@@ -3027,50 +4115,28 @@ declare namespace ts {
      * where Symbol is literally the word "Symbol", and name is any identifierName
      */
     function isWellKnownSymbolSyntactically(node: Expression): boolean;
-    function getPropertyNameForPropertyNameNode(name: DeclarationName): string;
+    function getPropertyNameForPropertyNameNode(name: DeclarationName | ParameterDeclaration): string;
     function getPropertyNameForKnownSymbolName(symbolName: string): string;
     /**
      * Includes the word "Symbol" with unicode escapes
      */
     function isESSymbolIdentifier(node: Node): boolean;
-    function isModifierKind(token: SyntaxKind): boolean;
+    function isPushOrUnshiftIdentifier(node: Identifier): boolean;
     function isParameterDeclaration(node: VariableLikeDeclaration): boolean;
     function getRootDeclaration(node: Node): Node;
     function nodeStartsNewLexicalEnvironment(node: Node): boolean;
     function nodeIsSynthesized(node: TextRange): boolean;
-    function getOriginalNode(node: Node): Node;
-    /**
-     * Gets a value indicating whether a node originated in the parse tree.
-     *
-     * @param node The node to test.
-     */
-    function isParseTreeNode(node: Node): boolean;
-    /**
-     * Gets the original parse tree node for a node.
-     *
-     * @param node The original node.
-     * @returns The original parse tree node if found; otherwise, undefined.
-     */
-    function getParseTreeNode(node: Node): Node;
-    /**
-     * Gets the original parse tree node for a node.
-     *
-     * @param node The original node.
-     * @param nodeTest A callback used to ensure the correct type of parse tree node is returned.
-     * @returns The original parse tree node if found; otherwise, undefined.
-     */
-    function getParseTreeNode<T extends Node>(node: Node, nodeTest?: (node: Node) => node is T): T;
+    function getOriginalSourceFile(sourceFile: SourceFile): SourceFile;
     function getOriginalSourceFiles(sourceFiles: SourceFile[]): SourceFile[];
-    function getOriginalNodeId(node: Node): number;
     enum Associativity {
         Left = 0,
         Right = 1,
     }
     function getExpressionAssociativity(expression: Expression): Associativity;
     function getOperatorAssociativity(kind: SyntaxKind, operator: SyntaxKind, hasArguments?: boolean): Associativity;
-    function getExpressionPrecedence(expression: Expression): 0 | 1 | -1 | 2 | 4 | 3 | 19 | 18 | 17 | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5;
-    function getOperator(expression: Expression): SyntaxKind;
-    function getOperatorPrecedence(nodeKind: SyntaxKind, operatorKind: SyntaxKind, hasArguments?: boolean): 0 | 1 | -1 | 2 | 4 | 3 | 19 | 18 | 17 | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5;
+    function getExpressionPrecedence(expression: Expression): 1 | -1 | 0 | 2 | 4 | 3 | 19 | 18 | 17 | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5;
+    function getOperator(expression: Expression): SyntaxKind.Unknown | SyntaxKind.EndOfFileToken | SyntaxKind.SingleLineCommentTrivia | SyntaxKind.MultiLineCommentTrivia | SyntaxKind.NewLineTrivia | SyntaxKind.WhitespaceTrivia | SyntaxKind.ShebangTrivia | SyntaxKind.ConflictMarkerTrivia | SyntaxKind.NumericLiteral | SyntaxKind.StringLiteral | SyntaxKind.JsxText | SyntaxKind.JsxTextAllWhiteSpaces | SyntaxKind.RegularExpressionLiteral | SyntaxKind.NoSubstitutionTemplateLiteral | SyntaxKind.TemplateHead | SyntaxKind.TemplateMiddle | SyntaxKind.TemplateTail | SyntaxKind.OpenBraceToken | SyntaxKind.CloseBraceToken | SyntaxKind.OpenParenToken | SyntaxKind.CloseParenToken | SyntaxKind.OpenBracketToken | SyntaxKind.CloseBracketToken | SyntaxKind.DotToken | SyntaxKind.DotDotDotToken | SyntaxKind.SemicolonToken | SyntaxKind.CommaToken | SyntaxKind.LessThanToken | SyntaxKind.LessThanSlashToken | SyntaxKind.GreaterThanToken | SyntaxKind.LessThanEqualsToken | SyntaxKind.GreaterThanEqualsToken | SyntaxKind.EqualsEqualsToken | SyntaxKind.ExclamationEqualsToken | SyntaxKind.EqualsEqualsEqualsToken | SyntaxKind.ExclamationEqualsEqualsToken | SyntaxKind.EqualsGreaterThanToken | SyntaxKind.PlusToken | SyntaxKind.MinusToken | SyntaxKind.AsteriskToken | SyntaxKind.AsteriskAsteriskToken | SyntaxKind.SlashToken | SyntaxKind.PercentToken | SyntaxKind.PlusPlusToken | SyntaxKind.MinusMinusToken | SyntaxKind.LessThanLessThanToken | SyntaxKind.GreaterThanGreaterThanToken | SyntaxKind.GreaterThanGreaterThanGreaterThanToken | SyntaxKind.AmpersandToken | SyntaxKind.BarToken | SyntaxKind.CaretToken | SyntaxKind.ExclamationToken | SyntaxKind.TildeToken | SyntaxKind.AmpersandAmpersandToken | SyntaxKind.BarBarToken | SyntaxKind.QuestionToken | SyntaxKind.ColonToken | SyntaxKind.AtToken | SyntaxKind.EqualsToken | SyntaxKind.PlusEqualsToken | SyntaxKind.MinusEqualsToken | SyntaxKind.AsteriskEqualsToken | SyntaxKind.AsteriskAsteriskEqualsToken | SyntaxKind.SlashEqualsToken | SyntaxKind.PercentEqualsToken | SyntaxKind.LessThanLessThanEqualsToken | SyntaxKind.GreaterThanGreaterThanEqualsToken | SyntaxKind.GreaterThanGreaterThanGreaterThanEqualsToken | SyntaxKind.AmpersandEqualsToken | SyntaxKind.BarEqualsToken | SyntaxKind.CaretEqualsToken | SyntaxKind.Identifier | SyntaxKind.BreakKeyword | SyntaxKind.CaseKeyword | SyntaxKind.CatchKeyword | SyntaxKind.ClassKeyword | SyntaxKind.ConstKeyword | SyntaxKind.ContinueKeyword | SyntaxKind.DebuggerKeyword | SyntaxKind.DefaultKeyword | SyntaxKind.DeleteKeyword | SyntaxKind.DoKeyword | SyntaxKind.ElseKeyword | SyntaxKind.EnumKeyword | SyntaxKind.ExportKeyword | SyntaxKind.ExtendsKeyword | SyntaxKind.FalseKeyword | SyntaxKind.FinallyKeyword | SyntaxKind.ForKeyword | SyntaxKind.FunctionKeyword | SyntaxKind.IfKeyword | SyntaxKind.ImportKeyword | SyntaxKind.InKeyword | SyntaxKind.InstanceOfKeyword | SyntaxKind.NewKeyword | SyntaxKind.NullKeyword | SyntaxKind.ReturnKeyword | SyntaxKind.SuperKeyword | SyntaxKind.SwitchKeyword | SyntaxKind.ThisKeyword | SyntaxKind.ThrowKeyword | SyntaxKind.TrueKeyword | SyntaxKind.TryKeyword | SyntaxKind.TypeOfKeyword | SyntaxKind.VarKeyword | SyntaxKind.VoidKeyword | SyntaxKind.WhileKeyword | SyntaxKind.WithKeyword | SyntaxKind.ImplementsKeyword | SyntaxKind.InterfaceKeyword | SyntaxKind.LetKeyword | SyntaxKind.PackageKeyword | SyntaxKind.PrivateKeyword | SyntaxKind.ProtectedKeyword | SyntaxKind.PublicKeyword | SyntaxKind.StaticKeyword | SyntaxKind.YieldKeyword | SyntaxKind.AbstractKeyword | SyntaxKind.AsKeyword | SyntaxKind.AnyKeyword | SyntaxKind.AsyncKeyword | SyntaxKind.AwaitKeyword | SyntaxKind.BooleanKeyword | SyntaxKind.ConstructorKeyword | SyntaxKind.DeclareKeyword | SyntaxKind.GetKeyword | SyntaxKind.IsKeyword | SyntaxKind.KeyOfKeyword | SyntaxKind.ModuleKeyword | SyntaxKind.NamespaceKeyword | SyntaxKind.NeverKeyword | SyntaxKind.ReadonlyKeyword | SyntaxKind.RequireKeyword | SyntaxKind.NumberKeyword | SyntaxKind.ObjectKeyword | SyntaxKind.SetKeyword | SyntaxKind.StringKeyword | SyntaxKind.SymbolKeyword | SyntaxKind.TypeKeyword | SyntaxKind.UndefinedKeyword | SyntaxKind.FromKeyword | SyntaxKind.GlobalKeyword | SyntaxKind.OfKeyword | SyntaxKind.QualifiedName | SyntaxKind.ComputedPropertyName | SyntaxKind.TypeParameter | SyntaxKind.Parameter | SyntaxKind.Decorator | SyntaxKind.PropertySignature | SyntaxKind.PropertyDeclaration | SyntaxKind.MethodSignature | SyntaxKind.MethodDeclaration | SyntaxKind.Constructor | SyntaxKind.GetAccessor | SyntaxKind.SetAccessor | SyntaxKind.CallSignature | SyntaxKind.ConstructSignature | SyntaxKind.IndexSignature | SyntaxKind.TypePredicate | SyntaxKind.TypeReference | SyntaxKind.FunctionType | SyntaxKind.ConstructorType | SyntaxKind.TypeQuery | SyntaxKind.TypeLiteral | SyntaxKind.ArrayType | SyntaxKind.TupleType | SyntaxKind.UnionType | SyntaxKind.IntersectionType | SyntaxKind.ParenthesizedType | SyntaxKind.ThisType | SyntaxKind.TypeOperator | SyntaxKind.IndexedAccessType | SyntaxKind.MappedType | SyntaxKind.LiteralType | SyntaxKind.ObjectBindingPattern | SyntaxKind.ArrayBindingPattern | SyntaxKind.BindingElement | SyntaxKind.ArrayLiteralExpression | SyntaxKind.ObjectLiteralExpression | SyntaxKind.PropertyAccessExpression | SyntaxKind.ElementAccessExpression | SyntaxKind.CallExpression | SyntaxKind.NewExpression | SyntaxKind.TaggedTemplateExpression | SyntaxKind.TypeAssertionExpression | SyntaxKind.ParenthesizedExpression | SyntaxKind.FunctionExpression | SyntaxKind.ArrowFunction | SyntaxKind.DeleteExpression | SyntaxKind.TypeOfExpression | SyntaxKind.VoidExpression | SyntaxKind.AwaitExpression | SyntaxKind.ConditionalExpression | SyntaxKind.TemplateExpression | SyntaxKind.YieldExpression | SyntaxKind.SpreadElement | SyntaxKind.ClassExpression | SyntaxKind.OmittedExpression | SyntaxKind.ExpressionWithTypeArguments | SyntaxKind.AsExpression | SyntaxKind.NonNullExpression | SyntaxKind.MetaProperty | SyntaxKind.TemplateSpan | SyntaxKind.SemicolonClassElement | SyntaxKind.Block | SyntaxKind.VariableStatement | SyntaxKind.EmptyStatement | SyntaxKind.ExpressionStatement | SyntaxKind.IfStatement | SyntaxKind.DoStatement | SyntaxKind.WhileStatement | SyntaxKind.ForStatement | SyntaxKind.ForInStatement | SyntaxKind.ForOfStatement | SyntaxKind.ContinueStatement | SyntaxKind.BreakStatement | SyntaxKind.ReturnStatement | SyntaxKind.WithStatement | SyntaxKind.SwitchStatement | SyntaxKind.LabeledStatement | SyntaxKind.ThrowStatement | SyntaxKind.TryStatement | SyntaxKind.DebuggerStatement | SyntaxKind.VariableDeclaration | SyntaxKind.VariableDeclarationList | SyntaxKind.FunctionDeclaration | SyntaxKind.ClassDeclaration | SyntaxKind.InterfaceDeclaration | SyntaxKind.TypeAliasDeclaration | SyntaxKind.EnumDeclaration | SyntaxKind.ModuleDeclaration | SyntaxKind.ModuleBlock | SyntaxKind.CaseBlock | SyntaxKind.NamespaceExportDeclaration | SyntaxKind.ImportEqualsDeclaration | SyntaxKind.ImportDeclaration | SyntaxKind.ImportClause | SyntaxKind.NamespaceImport | SyntaxKind.NamedImports | SyntaxKind.ImportSpecifier | SyntaxKind.ExportAssignment | SyntaxKind.ExportDeclaration | SyntaxKind.NamedExports | SyntaxKind.ExportSpecifier | SyntaxKind.MissingDeclaration | SyntaxKind.ExternalModuleReference | SyntaxKind.JsxElement | SyntaxKind.JsxSelfClosingElement | SyntaxKind.JsxOpeningElement | SyntaxKind.JsxClosingElement | SyntaxKind.JsxAttribute | SyntaxKind.JsxAttributes | SyntaxKind.JsxSpreadAttribute | SyntaxKind.JsxExpression | SyntaxKind.CaseClause | SyntaxKind.DefaultClause | SyntaxKind.HeritageClause | SyntaxKind.CatchClause | SyntaxKind.PropertyAssignment | SyntaxKind.ShorthandPropertyAssignment | SyntaxKind.SpreadAssignment | SyntaxKind.EnumMember | SyntaxKind.SourceFile | SyntaxKind.Bundle | SyntaxKind.JSDocTypeExpression | SyntaxKind.JSDocAllType | SyntaxKind.JSDocUnknownType | SyntaxKind.JSDocArrayType | SyntaxKind.JSDocUnionType | SyntaxKind.JSDocTupleType | SyntaxKind.JSDocNullableType | SyntaxKind.JSDocNonNullableType | SyntaxKind.JSDocRecordType | SyntaxKind.JSDocRecordMember | SyntaxKind.JSDocTypeReference | SyntaxKind.JSDocOptionalType | SyntaxKind.JSDocFunctionType | SyntaxKind.JSDocVariadicType | SyntaxKind.JSDocConstructorType | SyntaxKind.JSDocThisType | SyntaxKind.JSDocComment | SyntaxKind.JSDocTag | SyntaxKind.JSDocAugmentsTag | SyntaxKind.JSDocClassTag | SyntaxKind.JSDocParameterTag | SyntaxKind.JSDocReturnTag | SyntaxKind.JSDocTypeTag | SyntaxKind.JSDocTemplateTag | SyntaxKind.JSDocTypedefTag | SyntaxKind.JSDocPropertyTag | SyntaxKind.JSDocTypeLiteral | SyntaxKind.JSDocLiteralType | SyntaxKind.SyntaxList | SyntaxKind.NotEmittedStatement | SyntaxKind.PartiallyEmittedExpression | SyntaxKind.CommaListExpression | SyntaxKind.MergeDeclarationMarker | SyntaxKind.EndOfDeclarationMarker | SyntaxKind.Count;
+    function getOperatorPrecedence(nodeKind: SyntaxKind, operatorKind: SyntaxKind, hasArguments?: boolean): 1 | -1 | 0 | 2 | 4 | 3 | 19 | 18 | 17 | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5;
     function createDiagnosticCollection(): DiagnosticCollection;
     /**
      * Based heavily on the abstract 'Quote'/'QuoteJSONString' operation from ECMA-262 (24.3.2.2),
@@ -3079,28 +4145,12 @@ declare namespace ts {
      */
     function escapeString(s: string): string;
     function isIntrinsicJsxName(name: string): boolean;
-    function escapeNonAsciiCharacters(s: string): string;
-    interface EmitTextWriter {
-        write(s: string): void;
-        writeTextOfNode(text: string, node: Node): void;
-        writeLine(): void;
-        increaseIndent(): void;
-        decreaseIndent(): void;
-        getText(): string;
-        rawWrite(s: string): void;
-        writeLiteral(s: string): void;
-        getTextPos(): number;
-        getLine(): number;
-        getColumn(): number;
-        getIndent(): number;
-        isAtStartOfLine(): boolean;
-        reset(): void;
-    }
+    function escapeNonAsciiString(s: string): string;
     function getIndentString(level: number): string;
     function getIndentSize(): number;
-    function createTextWriter(newLine: String): EmitTextWriter;
+    function createTextWriter(newLine: string): EmitTextWriter;
     function getResolvedExternalModuleName(host: EmitHost, file: SourceFile): string;
-    function getExternalModuleNameFromDeclaration(host: EmitHost, resolver: EmitResolver, declaration: ImportEqualsDeclaration | ImportDeclaration | ExportDeclaration): string;
+    function getExternalModuleNameFromDeclaration(host: EmitHost, resolver: EmitResolver, declaration: ImportEqualsDeclaration | ImportDeclaration | ExportDeclaration | ModuleDeclaration): string;
     /**
      * Resolves a local path to a path which is absolute to the base of the emit
      */
@@ -3122,34 +4172,19 @@ declare namespace ts {
      * @param targetSourceFile An optional target source file to emit.
      */
     function getSourceFilesToEmit(host: EmitHost, targetSourceFile?: SourceFile): SourceFile[];
-    /**
-     * Iterates over each source file to emit. The source files are expected to have been
-     * transformed for use by the pretty printer.
-     *
-     * Originally part of `forEachExpectedEmitFile`, this functionality was extracted to support
-     * transformations.
-     *
-     * @param host An EmitHost.
-     * @param sourceFiles The transformed source files to emit.
-     * @param action The action to execute.
-     */
-    function forEachTransformedEmitFile(host: EmitHost, sourceFiles: SourceFile[], action: (jsFilePath: string, sourceMapFilePath: string, declarationFilePath: string, sourceFiles: SourceFile[], isBundledEmit: boolean) => void, emitOnlyDtsFiles?: boolean): void;
-    /**
-     * Iterates over the source files that are expected to have an emit output. This function
-     * is used by the legacy emitter and the declaration emitter and should not be used by
-     * the tree transforming emitter.
-     *
-     * @param host An EmitHost.
-     * @param action The action to execute.
-     * @param targetSourceFile An optional target source file to emit.
-     */
-    function forEachExpectedEmitFile(host: EmitHost, action: (emitFileNames: EmitFileNames, sourceFiles: SourceFile[], isBundledEmit: boolean, emitOnlyDtsFiles: boolean) => void, targetSourceFile?: SourceFile, emitOnlyDtsFiles?: boolean): void;
+    /** Don't call this for `--outFile`, just for `--outDir` or plain emit. `--outFile` needs additional checks. */
+    function sourceFileMayBeEmitted(sourceFile: SourceFile, options: CompilerOptions, isSourceFileFromExternalLibrary: (file: SourceFile) => boolean): boolean;
     function getSourceFilePathInNewDir(sourceFile: SourceFile, host: EmitHost, newDirPath: string): string;
     function writeFile(host: EmitHost, diagnostics: DiagnosticCollection, fileName: string, data: string, writeByteOrderMark: boolean, sourceFiles?: SourceFile[]): void;
     function getLineOfLocalPosition(currentSourceFile: SourceFile, pos: number): number;
     function getLineOfLocalPositionFromLineMap(lineMap: number[], pos: number): number;
     function getFirstConstructorWithBody(node: ClassLikeDeclaration): ConstructorDeclaration;
-    function getSetAccessorTypeAnnotationNode(accessor: AccessorDeclaration): TypeNode;
+    /** Get the type annotation for the value parameter. */
+    function getSetAccessorTypeAnnotationNode(accessor: SetAccessorDeclaration): TypeNode;
+    function getThisParameter(signature: SignatureDeclaration): ParameterDeclaration | undefined;
+    function parameterIsThisKeyword(parameter: ParameterDeclaration): boolean;
+    function isThisIdentifier(node: Node | undefined): boolean;
+    function identifierIsThisKeyword(id: Identifier): boolean;
     interface AllAccessorDeclarations {
         firstAccessor: AccessorDeclaration;
         secondAccessor: AccessorDeclaration;
@@ -3157,15 +4192,35 @@ declare namespace ts {
         setAccessor: AccessorDeclaration;
     }
     function getAllAccessorDeclarations(declarations: NodeArray<Declaration>, accessor: AccessorDeclaration): AllAccessorDeclarations;
-    function emitNewLineBeforeLeadingComments(lineMap: number[], writer: EmitTextWriter, node: TextRange, leadingComments: CommentRange[]): void;
-    function emitNewLineBeforeLeadingCommentsOfPosition(lineMap: number[], writer: EmitTextWriter, pos: number, leadingComments: CommentRange[]): void;
-    function emitNewLineBeforeLeadingCommentOfPosition(lineMap: number[], writer: EmitTextWriter, pos: number, commentPos: number): void;
-    function emitComments(text: string, lineMap: number[], writer: EmitTextWriter, comments: CommentRange[], leadingSeparator: boolean, trailingSeparator: boolean, newLine: string, writeComment: (text: string, lineMap: number[], writer: EmitTextWriter, commentPos: number, commentEnd: number, newLine: string) => void): void;
     /**
-     * Detached comment is a comment at the top of file or function body that is separated from
-     * the next statement by space.
+     * Gets the effective type annotation of a variable, parameter, or property. If the node was
+     * parsed in a JavaScript file, gets the type annotation from JSDoc.
      */
-    function emitDetachedComments(text: string, lineMap: number[], writer: EmitTextWriter, writeComment: (text: string, lineMap: number[], writer: EmitTextWriter, commentPos: number, commentEnd: number, newLine: string) => void, node: TextRange, newLine: string, removeComments: boolean): {
+    function getEffectiveTypeAnnotationNode(node: VariableLikeDeclaration): TypeNode;
+    /**
+     * Gets the effective return type annotation of a signature. If the node was parsed in a
+     * JavaScript file, gets the return type annotation from JSDoc.
+     */
+    function getEffectiveReturnTypeNode(node: SignatureDeclaration): TypeNode;
+    /**
+     * Gets the effective type parameters. If the node was parsed in a
+     * JavaScript file, gets the type parameters from the `@template` tag from JSDoc.
+     */
+    function getEffectiveTypeParameterDeclarations(node: DeclarationWithTypeParameters): TypeParameterDeclaration[];
+    /**
+     * Gets the effective type annotation of the value parameter of a set accessor. If the node
+     * was parsed in a JavaScript file, gets the type annotation from JSDoc.
+     */
+    function getEffectiveSetAccessorTypeAnnotationNode(node: SetAccessorDeclaration): TypeNode;
+    function emitNewLineBeforeLeadingComments(lineMap: number[], writer: EmitTextWriter, node: TextRange, leadingComments: CommentRange[]): void;
+    function emitNewLineBeforeLeadingCommentsOfPosition(lineMap: number[], writer: EmitTextWriter, pos: number, leadingComments: CommentRange[]): void;
+    function emitNewLineBeforeLeadingCommentOfPosition(lineMap: number[], writer: EmitTextWriter, pos: number, commentPos: number): void;
+    function emitComments(text: string, lineMap: number[], writer: EmitTextWriter, comments: CommentRange[], leadingSeparator: boolean, trailingSeparator: boolean, newLine: string, writeComment: (text: string, lineMap: number[], writer: EmitTextWriter, commentPos: number, commentEnd: number, newLine: string) => void): void;
+    /**
+     * Detached comment is a comment at the top of file or function body that is separated from
+     * the next statement by space.
+     */
+    function emitDetachedComments(text: string, lineMap: number[], writer: EmitTextWriter, writeComment: (text: string, lineMap: number[], writer: EmitTextWriter, commentPos: number, commentEnd: number, newLine: string) => void, node: TextRange, newLine: string, removeComments: boolean): {
         nodePos: number;
         detachedCommentEndPos: number;
     };
@@ -3173,30 +4228,30 @@ declare namespace ts {
     function hasModifiers(node: Node): boolean;
     function hasModifier(node: Node, flags: ModifierFlags): boolean;
     function getModifierFlags(node: Node): ModifierFlags;
+    function getModifierFlagsNoCache(node: Node): ModifierFlags;
     function modifierToFlag(token: SyntaxKind): ModifierFlags;
     function isLogicalOperator(token: SyntaxKind): boolean;
     function isAssignmentOperator(token: SyntaxKind): boolean;
     /** Get `C` given `N` if `N` is in the position `class C extends N` where `N` is an ExpressionWithTypeArguments. */
     function tryGetClassExtendingExpressionWithTypeArguments(node: Node): ClassLikeDeclaration | undefined;
-    function isDestructuringAssignment(node: Node): node is BinaryExpression;
+    function isAssignmentExpression(node: Node, excludeCompoundAssignment: true): node is AssignmentExpression<EqualsToken>;
+    function isAssignmentExpression(node: Node, excludeCompoundAssignment?: false): node is AssignmentExpression<AssignmentOperatorToken>;
+    function isDestructuringAssignment(node: Node): node is DestructuringAssignment;
     function isSupportedExpressionWithTypeArguments(node: ExpressionWithTypeArguments): boolean;
     function isExpressionWithTypeArgumentsInClassExtendsClause(node: Node): boolean;
+    function isExpressionWithTypeArgumentsInClassImplementsClause(node: Node): node is ExpressionWithTypeArguments;
     function isEntityNameExpression(node: Expression): node is EntityNameExpression;
     function isRightSideOfQualifiedNameOrPropertyAccess(node: Node): boolean;
-    function isEmptyObjectLiteralOrArrayLiteral(expression: Node): boolean;
+    function isEmptyObjectLiteral(expression: Node): boolean;
+    function isEmptyArrayLiteral(expression: Node): boolean;
     function getLocalSymbolForExportDefault(symbol: Symbol): Symbol;
     /** Return ".ts", ".d.ts", or ".tsx", if that is the extension. */
     function tryExtractTypeScriptExtension(fileName: string): string | undefined;
-    /**
-     * Serialize an object graph into a JSON string. This is intended only for use on an acyclic graph
-     * as the fallback implementation does not check for circular references by default.
-     */
-    const stringify: (value: any) => string;
     /**
      * Converts a string to a base-64 encoded ASCII string.
      */
     function convertToBase64(input: string): string;
-    function getNewLineCharacter(options: CompilerOptions): string;
+    function getNewLineCharacter(options: CompilerOptions | PrinterOptions): string;
     /**
      * Tests whether a node and its subtree is simple enough to have its position
      * information ignored when emitting source maps in a destructuring assignment.
@@ -3205,6 +4260,14 @@ declare namespace ts {
      */
     function isSimpleExpression(node: Expression): boolean;
     function formatSyntaxKind(kind: SyntaxKind): string;
+    function formatModifierFlags(flags: ModifierFlags): string;
+    function formatTransformFlags(flags: TransformFlags): string;
+    function formatEmitFlags(flags: EmitFlags): string;
+    function formatSymbolFlags(flags: SymbolFlags): string;
+    function formatTypeFlags(flags: TypeFlags): string;
+    function formatObjectFlags(flags: ObjectFlags): string;
+    function getRangePos(range: TextRange | undefined): number;
+    function getRangeEnd(range: TextRange | undefined): number;
     /**
      * Increases (or decreases) a position by the provided amount.
      *
@@ -3275,12 +4338,11 @@ declare namespace ts {
     function rangeEndIsOnSameLineAsRangeStart(range1: TextRange, range2: TextRange, sourceFile: SourceFile): boolean;
     function positionsAreOnSameLine(pos1: number, pos2: number, sourceFile: SourceFile): boolean;
     function getStartPositionOfRange(range: TextRange, sourceFile: SourceFile): number;
-    function collectExternalModuleInfo(sourceFile: SourceFile, resolver: EmitResolver): {
-        externalImports: (ImportEqualsDeclaration | ImportDeclaration | ExportDeclaration)[];
-        exportSpecifiers: Map<ExportSpecifier[]>;
-        exportEquals: ExportAssignment;
-        hasExportStarsToExportValues: boolean;
-    };
+    /**
+     * Determines whether a name was originally the declaration name of an enum or namespace
+     * declaration.
+     */
+    function isDeclarationNameOfEnumOrNamespace(node: Identifier): boolean;
     function getInitializedVariables(node: VariableDeclarationList): VariableDeclaration[];
     /**
      * Gets a value indicating whether a node is merged with a class declaration in the same scope.
@@ -3293,27 +4355,273 @@ declare namespace ts {
      * @param kind The SyntaxKind to find among related declarations.
      */
     function isFirstDeclarationOfKind(node: Node, kind: SyntaxKind): boolean;
-    function isNodeArray<T extends Node>(array: T[]): array is NodeArray<T>;
+    function isWatchSet(options: CompilerOptions): boolean;
+    function getCheckFlags(symbol: Symbol): CheckFlags;
+    function getDeclarationModifierFlagsFromSymbol(s: Symbol): ModifierFlags;
+    function levenshtein(s1: string, s2: string): number;
+}
+declare namespace ts {
+    function getDefaultLibFileName(options: CompilerOptions): string;
+    function textSpanEnd(span: TextSpan): number;
+    function textSpanIsEmpty(span: TextSpan): boolean;
+    function textSpanContainsPosition(span: TextSpan, position: number): boolean;
+    function textSpanContainsTextSpan(span: TextSpan, other: TextSpan): boolean;
+    function textSpanOverlapsWith(span: TextSpan, other: TextSpan): boolean;
+    function textSpanOverlap(span1: TextSpan, span2: TextSpan): TextSpan;
+    function textSpanIntersectsWithTextSpan(span: TextSpan, other: TextSpan): boolean;
+    function textSpanIntersectsWith(span: TextSpan, start: number, length: number): boolean;
+    function decodedTextSpanIntersectsWith(start1: number, length1: number, start2: number, length2: number): boolean;
+    function textSpanIntersectsWithPosition(span: TextSpan, position: number): boolean;
+    function textSpanIntersection(span1: TextSpan, span2: TextSpan): TextSpan;
+    function createTextSpan(start: number, length: number): TextSpan;
+    function createTextSpanFromBounds(start: number, end: number): TextSpan;
+    function textChangeRangeNewSpan(range: TextChangeRange): TextSpan;
+    function textChangeRangeIsUnchanged(range: TextChangeRange): boolean;
+    function createTextChangeRange(span: TextSpan, newLength: number): TextChangeRange;
+    let unchangedTextChangeRange: TextChangeRange;
+    /**
+     * Called to merge all the changes that occurred across several versions of a script snapshot
+     * into a single change.  i.e. if a user keeps making successive edits to a script we will
+     * have a text change from V1 to V2, V2 to V3, ..., Vn.
+     *
+     * This function will then merge those changes into a single change range valid between V1 and
+     * Vn.
+     */
+    function collapseTextChangeRangesAcrossMultipleVersions(changes: TextChangeRange[]): TextChangeRange;
+    function getTypeParameterOwner(d: Declaration): Declaration;
+    function isParameterPropertyDeclaration(node: Node): boolean;
+    function getCombinedModifierFlags(node: Node): ModifierFlags;
+    function getCombinedNodeFlags(node: Node): NodeFlags;
+    /**
+     * Checks to see if the locale is in the appropriate format,
+     * and if it is, attempts to set the appropriate language.
+     */
+    function validateLocaleAndSetLanguage(locale: string, sys: {
+        getExecutingFilePath(): string;
+        resolvePath(path: string): string;
+        fileExists(fileName: string): boolean;
+        readFile(fileName: string): string;
+    }, errors?: Diagnostic[]): void;
+    function getOriginalNode(node: Node): Node;
+    function getOriginalNode<T extends Node>(node: Node, nodeTest: (node: Node) => node is T): T;
+    /**
+     * Gets a value indicating whether a node originated in the parse tree.
+     *
+     * @param node The node to test.
+     */
+    function isParseTreeNode(node: Node): boolean;
+    /**
+     * Gets the original parse tree node for a node.
+     *
+     * @param node The original node.
+     * @returns The original parse tree node if found; otherwise, undefined.
+     */
+    function getParseTreeNode(node: Node): Node;
+    /**
+     * Gets the original parse tree node for a node.
+     *
+     * @param node The original node.
+     * @param nodeTest A callback used to ensure the correct type of parse tree node is returned.
+     * @returns The original parse tree node if found; otherwise, undefined.
+     */
+    function getParseTreeNode<T extends Node>(node: Node, nodeTest?: (node: Node) => node is T): T;
+    /**
+     * Remove extra underscore from escaped identifier text content.
+     *
+     * @param identifier The escaped identifier text.
+     * @returns The unescaped identifier text.
+     */
+    function unescapeIdentifier(identifier: string): string;
+    function getNameOfDeclaration(declaration: Declaration): DeclarationName | undefined;
+}
+declare namespace ts {
+    function isNumericLiteral(node: Node): node is NumericLiteral;
+    function isStringLiteral(node: Node): node is StringLiteral;
+    function isJsxText(node: Node): node is JsxText;
+    function isRegularExpressionLiteral(node: Node): node is RegularExpressionLiteral;
     function isNoSubstitutionTemplateLiteral(node: Node): node is LiteralExpression;
+    function isTemplateHead(node: Node): node is TemplateHead;
+    function isTemplateMiddle(node: Node): node is TemplateMiddle;
+    function isTemplateTail(node: Node): node is TemplateTail;
+    function isIdentifier(node: Node): node is Identifier;
+    function isQualifiedName(node: Node): node is QualifiedName;
+    function isComputedPropertyName(node: Node): node is ComputedPropertyName;
+    function isTypeParameterDeclaration(node: Node): node is TypeParameterDeclaration;
+    function isParameter(node: Node): node is ParameterDeclaration;
+    function isDecorator(node: Node): node is Decorator;
+    function isPropertySignature(node: Node): node is PropertySignature;
+    function isPropertyDeclaration(node: Node): node is PropertyDeclaration;
+    function isMethodSignature(node: Node): node is MethodSignature;
+    function isMethodDeclaration(node: Node): node is MethodDeclaration;
+    function isConstructorDeclaration(node: Node): node is ConstructorDeclaration;
+    function isGetAccessorDeclaration(node: Node): node is GetAccessorDeclaration;
+    function isSetAccessorDeclaration(node: Node): node is SetAccessorDeclaration;
+    function isCallSignatureDeclaration(node: Node): node is CallSignatureDeclaration;
+    function isConstructSignatureDeclaration(node: Node): node is ConstructSignatureDeclaration;
+    function isIndexSignatureDeclaration(node: Node): node is IndexSignatureDeclaration;
+    function isTypePredicateNode(node: Node): node is TypePredicateNode;
+    function isTypeReferenceNode(node: Node): node is TypeReferenceNode;
+    function isFunctionTypeNode(node: Node): node is FunctionTypeNode;
+    function isConstructorTypeNode(node: Node): node is ConstructorTypeNode;
+    function isTypeQueryNode(node: Node): node is TypeQueryNode;
+    function isTypeLiteralNode(node: Node): node is TypeLiteralNode;
+    function isArrayTypeNode(node: Node): node is ArrayTypeNode;
+    function isTupleTypeNode(node: Node): node is TupleTypeNode;
+    function isUnionTypeNode(node: Node): node is UnionTypeNode;
+    function isIntersectionTypeNode(node: Node): node is IntersectionTypeNode;
+    function isParenthesizedTypeNode(node: Node): node is ParenthesizedTypeNode;
+    function isThisTypeNode(node: Node): node is ThisTypeNode;
+    function isTypeOperatorNode(node: Node): node is TypeOperatorNode;
+    function isIndexedAccessTypeNode(node: Node): node is IndexedAccessTypeNode;
+    function isMappedTypeNode(node: Node): node is MappedTypeNode;
+    function isLiteralTypeNode(node: Node): node is LiteralTypeNode;
+    function isObjectBindingPattern(node: Node): node is ObjectBindingPattern;
+    function isArrayBindingPattern(node: Node): node is ArrayBindingPattern;
+    function isBindingElement(node: Node): node is BindingElement;
+    function isArrayLiteralExpression(node: Node): node is ArrayLiteralExpression;
+    function isObjectLiteralExpression(node: Node): node is ObjectLiteralExpression;
+    function isPropertyAccessExpression(node: Node): node is PropertyAccessExpression;
+    function isElementAccessExpression(node: Node): node is ElementAccessExpression;
+    function isCallExpression(node: Node): node is CallExpression;
+    function isNewExpression(node: Node): node is NewExpression;
+    function isTaggedTemplateExpression(node: Node): node is TaggedTemplateExpression;
+    function isTypeAssertion(node: Node): node is TypeAssertion;
+    function isParenthesizedExpression(node: Node): node is ParenthesizedExpression;
+    function skipPartiallyEmittedExpressions(node: Expression): Expression;
+    function skipPartiallyEmittedExpressions(node: Node): Node;
+    function isFunctionExpression(node: Node): node is FunctionExpression;
+    function isArrowFunction(node: Node): node is ArrowFunction;
+    function isDeleteExpression(node: Node): node is DeleteExpression;
+    function isTypeOfExpression(node: Node): node is TypeOfExpression;
+    function isVoidExpression(node: Node): node is VoidExpression;
+    function isAwaitExpression(node: Node): node is AwaitExpression;
+    function isPrefixUnaryExpression(node: Node): node is PrefixUnaryExpression;
+    function isPostfixUnaryExpression(node: Node): node is PostfixUnaryExpression;
+    function isBinaryExpression(node: Node): node is BinaryExpression;
+    function isConditionalExpression(node: Node): node is ConditionalExpression;
+    function isTemplateExpression(node: Node): node is TemplateExpression;
+    function isYieldExpression(node: Node): node is YieldExpression;
+    function isSpreadElement(node: Node): node is SpreadElement;
+    function isClassExpression(node: Node): node is ClassExpression;
+    function isOmittedExpression(node: Node): node is OmittedExpression;
+    function isExpressionWithTypeArguments(node: Node): node is ExpressionWithTypeArguments;
+    function isAsExpression(node: Node): node is AsExpression;
+    function isNonNullExpression(node: Node): node is NonNullExpression;
+    function isMetaProperty(node: Node): node is MetaProperty;
+    function isTemplateSpan(node: Node): node is TemplateSpan;
+    function isSemicolonClassElement(node: Node): node is SemicolonClassElement;
+    function isBlock(node: Node): node is Block;
+    function isVariableStatement(node: Node): node is VariableStatement;
+    function isEmptyStatement(node: Node): node is EmptyStatement;
+    function isExpressionStatement(node: Node): node is ExpressionStatement;
+    function isIfStatement(node: Node): node is IfStatement;
+    function isDoStatement(node: Node): node is DoStatement;
+    function isWhileStatement(node: Node): node is WhileStatement;
+    function isForStatement(node: Node): node is ForStatement;
+    function isForInStatement(node: Node): node is ForInStatement;
+    function isForOfStatement(node: Node): node is ForOfStatement;
+    function isContinueStatement(node: Node): node is ContinueStatement;
+    function isBreakStatement(node: Node): node is BreakStatement;
+    function isReturnStatement(node: Node): node is ReturnStatement;
+    function isWithStatement(node: Node): node is WithStatement;
+    function isSwitchStatement(node: Node): node is SwitchStatement;
+    function isLabeledStatement(node: Node): node is LabeledStatement;
+    function isThrowStatement(node: Node): node is ThrowStatement;
+    function isTryStatement(node: Node): node is TryStatement;
+    function isDebuggerStatement(node: Node): node is DebuggerStatement;
+    function isVariableDeclaration(node: Node): node is VariableDeclaration;
+    function isVariableDeclarationList(node: Node): node is VariableDeclarationList;
+    function isFunctionDeclaration(node: Node): node is FunctionDeclaration;
+    function isClassDeclaration(node: Node): node is ClassDeclaration;
+    function isInterfaceDeclaration(node: Node): node is InterfaceDeclaration;
+    function isTypeAliasDeclaration(node: Node): node is TypeAliasDeclaration;
+    function isEnumDeclaration(node: Node): node is EnumDeclaration;
+    function isModuleDeclaration(node: Node): node is ModuleDeclaration;
+    function isModuleBlock(node: Node): node is ModuleBlock;
+    function isCaseBlock(node: Node): node is CaseBlock;
+    function isNamespaceExportDeclaration(node: Node): node is NamespaceExportDeclaration;
+    function isImportEqualsDeclaration(node: Node): node is ImportEqualsDeclaration;
+    function isImportDeclaration(node: Node): node is ImportDeclaration;
+    function isImportClause(node: Node): node is ImportClause;
+    function isNamespaceImport(node: Node): node is NamespaceImport;
+    function isNamedImports(node: Node): node is NamedImports;
+    function isImportSpecifier(node: Node): node is ImportSpecifier;
+    function isExportAssignment(node: Node): node is ExportAssignment;
+    function isExportDeclaration(node: Node): node is ExportDeclaration;
+    function isNamedExports(node: Node): node is NamedExports;
+    function isExportSpecifier(node: Node): node is ExportSpecifier;
+    function isMissingDeclaration(node: Node): node is MissingDeclaration;
+    function isExternalModuleReference(node: Node): node is ExternalModuleReference;
+    function isJsxElement(node: Node): node is JsxElement;
+    function isJsxSelfClosingElement(node: Node): node is JsxSelfClosingElement;
+    function isJsxOpeningElement(node: Node): node is JsxOpeningElement;
+    function isJsxClosingElement(node: Node): node is JsxClosingElement;
+    function isJsxAttribute(node: Node): node is JsxAttribute;
+    function isJsxAttributes(node: Node): node is JsxAttributes;
+    function isJsxSpreadAttribute(node: Node): node is JsxSpreadAttribute;
+    function isJsxExpression(node: Node): node is JsxExpression;
+    function isCaseClause(node: Node): node is CaseClause;
+    function isDefaultClause(node: Node): node is DefaultClause;
+    function isHeritageClause(node: Node): node is HeritageClause;
+    function isCatchClause(node: Node): node is CatchClause;
+    function isPropertyAssignment(node: Node): node is PropertyAssignment;
+    function isShorthandPropertyAssignment(node: Node): node is ShorthandPropertyAssignment;
+    function isSpreadAssignment(node: Node): node is SpreadAssignment;
+    function isEnumMember(node: Node): node is EnumMember;
+    function isSourceFile(node: Node): node is SourceFile;
+    function isBundle(node: Node): node is Bundle;
+    function isJSDocTypeExpression(node: Node): node is JSDocTypeExpression;
+    function isJSDocAllType(node: JSDocAllType): node is JSDocAllType;
+    function isJSDocUnknownType(node: Node): node is JSDocUnknownType;
+    function isJSDocArrayType(node: Node): node is JSDocArrayType;
+    function isJSDocUnionType(node: Node): node is JSDocUnionType;
+    function isJSDocTupleType(node: Node): node is JSDocTupleType;
+    function isJSDocNullableType(node: Node): node is JSDocNullableType;
+    function isJSDocNonNullableType(node: Node): node is JSDocNonNullableType;
+    function isJSDocRecordType(node: Node): node is JSDocRecordType;
+    function isJSDocRecordMember(node: Node): node is JSDocRecordMember;
+    function isJSDocTypeReference(node: Node): node is JSDocTypeReference;
+    function isJSDocOptionalType(node: Node): node is JSDocOptionalType;
+    function isJSDocFunctionType(node: Node): node is JSDocFunctionType;
+    function isJSDocVariadicType(node: Node): node is JSDocVariadicType;
+    function isJSDocConstructorType(node: Node): node is JSDocConstructorType;
+    function isJSDocThisType(node: Node): node is JSDocThisType;
+    function isJSDoc(node: Node): node is JSDoc;
+    function isJSDocAugmentsTag(node: Node): node is JSDocAugmentsTag;
+    function isJSDocParameterTag(node: Node): node is JSDocParameterTag;
+    function isJSDocReturnTag(node: Node): node is JSDocReturnTag;
+    function isJSDocTypeTag(node: Node): node is JSDocTypeTag;
+    function isJSDocTemplateTag(node: Node): node is JSDocTemplateTag;
+    function isJSDocTypedefTag(node: Node): node is JSDocTypedefTag;
+    function isJSDocPropertyTag(node: Node): node is JSDocPropertyTag;
+    function isJSDocTypeLiteral(node: Node): node is JSDocTypeLiteral;
+    function isJSDocLiteralType(node: Node): node is JSDocLiteralType;
+}
+declare namespace ts {
+    function isNode(node: Node): boolean;
+    function isNodeKind(kind: SyntaxKind): boolean;
+    /**
+     * True if node is of some token syntax kind.
+     * For example, this is true for an IfKeyword but not for an IfStatement.
+     */
+    function isToken(n: Node): boolean;
+    function isNodeArray<T extends Node>(array: T[]): array is NodeArray<T>;
     function isLiteralKind(kind: SyntaxKind): boolean;
-    function isTextualLiteralKind(kind: SyntaxKind): boolean;
     function isLiteralExpression(node: Node): node is LiteralExpression;
     function isTemplateLiteralKind(kind: SyntaxKind): boolean;
-    function isTemplateLiteralFragment(node: Node): node is TemplateLiteralFragment;
-    function isIdentifier(node: Node): node is Identifier;
-    function isGeneratedIdentifier(node: Node): boolean;
+    function isTemplateMiddleOrTemplateTail(node: Node): node is TemplateMiddle | TemplateTail;
+    function isGeneratedIdentifier(node: Node): node is GeneratedIdentifier;
+    function isModifierKind(token: SyntaxKind): boolean;
     function isModifier(node: Node): node is Modifier;
-    function isQualifiedName(node: Node): node is QualifiedName;
-    function isComputedPropertyName(node: Node): node is ComputedPropertyName;
     function isEntityName(node: Node): node is EntityName;
     function isPropertyName(node: Node): node is PropertyName;
-    function isModuleName(node: Node): node is ModuleName;
     function isBindingName(node: Node): node is BindingName;
-    function isTypeParameter(node: Node): node is TypeParameterDeclaration;
-    function isParameter(node: Node): node is ParameterDeclaration;
-    function isDecorator(node: Node): node is Decorator;
-    function isMethodDeclaration(node: Node): node is MethodDeclaration;
+    function isFunctionLike(node: Node): node is FunctionLikeDeclaration;
+    function isFunctionLikeKind(kind: SyntaxKind): boolean;
     function isClassElement(node: Node): node is ClassElement;
+    function isClassLike(node: Node): node is ClassLikeDeclaration;
+    function isAccessor(node: Node): node is AccessorDeclaration;
+    function isTypeElement(node: Node): node is TypeElement;
     function isObjectLiteralElementLike(node: Node): node is ObjectLiteralElementLike;
     /**
      * Node test that determines whether a node is a valid type node.
@@ -3321,17 +4629,30 @@ declare namespace ts {
      * of a TypeNode.
      */
     function isTypeNode(node: Node): node is TypeNode;
+    function isFunctionOrConstructorTypeNode(node: Node): node is FunctionTypeNode | ConstructorTypeNode;
     function isBindingPattern(node: Node): node is BindingPattern;
-    function isBindingElement(node: Node): node is BindingElement;
+    function isAssignmentPattern(node: Node): node is AssignmentPattern;
     function isArrayBindingElement(node: Node): node is ArrayBindingElement;
-    function isPropertyAccessExpression(node: Node): node is PropertyAccessExpression;
-    function isElementAccessExpression(node: Node): node is ElementAccessExpression;
-    function isBinaryExpression(node: Node): node is BinaryExpression;
-    function isConditionalExpression(node: Node): node is ConditionalExpression;
-    function isCallExpression(node: Node): node is CallExpression;
-    function isTemplate(node: Node): node is Template;
-    function isSpreadElementExpression(node: Node): node is SpreadElementExpression;
-    function isExpressionWithTypeArguments(node: Node): node is ExpressionWithTypeArguments;
+    /**
+     * Determines whether the BindingOrAssignmentElement is a BindingElement-like declaration
+     */
+    function isDeclarationBindingElement(bindingElement: BindingOrAssignmentElement): bindingElement is VariableDeclaration | ParameterDeclaration | BindingElement;
+    /**
+     * Determines whether a node is a BindingOrAssignmentPattern
+     */
+    function isBindingOrAssignmentPattern(node: BindingOrAssignmentElementTarget): node is BindingOrAssignmentPattern;
+    /**
+     * Determines whether a node is an ObjectBindingOrAssignmentPattern
+     */
+    function isObjectBindingOrAssignmentPattern(node: BindingOrAssignmentElementTarget): node is ObjectBindingOrAssignmentPattern;
+    /**
+     * Determines whether a node is an ArrayBindingOrAssignmentPattern
+     */
+    function isArrayBindingOrAssignmentPattern(node: BindingOrAssignmentElementTarget): node is ArrayBindingOrAssignmentPattern;
+    function isPropertyAccessOrQualifiedName(node: Node): node is PropertyAccessExpression | QualifiedName;
+    function isCallLikeExpression(node: Node): node is CallLikeExpression;
+    function isCallOrNewExpression(node: Node): node is CallExpression | NewExpression;
+    function isTemplateLiteral(node: Node): node is TemplateLiteral;
     function isLeftHandSideExpression(node: Node): node is LeftHandSideExpression;
     function isUnaryExpression(node: Node): node is UnaryExpression;
     function isExpression(node: Node): node is Expression;
@@ -3339,24 +4660,17 @@ declare namespace ts {
     function isPartiallyEmittedExpression(node: Node): node is PartiallyEmittedExpression;
     function isNotEmittedStatement(node: Node): node is NotEmittedStatement;
     function isNotEmittedOrPartiallyEmittedNode(node: Node): node is NotEmittedStatement | PartiallyEmittedExpression;
-    function isOmittedExpression(node: Node): node is OmittedExpression;
-    function isTemplateSpan(node: Node): node is TemplateSpan;
-    function isBlock(node: Node): node is Block;
+    function isIterationStatement(node: Node, lookInLabeledStatements: boolean): node is IterationStatement;
+    function isForInOrOfStatement(node: Node): node is ForInOrOfStatement;
     function isConciseBody(node: Node): node is ConciseBody;
     function isFunctionBody(node: Node): node is FunctionBody;
     function isForInitializer(node: Node): node is ForInitializer;
-    function isVariableDeclaration(node: Node): node is VariableDeclaration;
-    function isVariableDeclarationList(node: Node): node is VariableDeclarationList;
-    function isCaseBlock(node: Node): node is CaseBlock;
     function isModuleBody(node: Node): node is ModuleBody;
-    function isImportEqualsDeclaration(node: Node): node is ImportEqualsDeclaration;
-    function isImportClause(node: Node): node is ImportClause;
+    function isNamespaceBody(node: Node): node is NamespaceBody;
+    function isJSDocNamespaceBody(node: Node): node is JSDocNamespaceBody;
     function isNamedImportBindings(node: Node): node is NamedImportBindings;
-    function isImportSpecifier(node: Node): node is ImportSpecifier;
-    function isNamedExports(node: Node): node is NamedExports;
-    function isExportSpecifier(node: Node): node is ExportSpecifier;
     function isModuleOrEnumDeclaration(node: Node): node is ModuleDeclaration | EnumDeclaration;
-    function isDeclaration(node: Node): node is Declaration;
+    function isDeclaration(node: Node): node is NamedDeclaration;
     function isDeclarationStatement(node: Node): node is DeclarationStatement;
     /**
      * Determines whether the node is a statement that is not also a declaration
@@ -3364,58 +4678,20 @@ declare namespace ts {
     function isStatementButNotDeclaration(node: Node): node is Statement;
     function isStatement(node: Node): node is Statement;
     function isModuleReference(node: Node): node is ModuleReference;
-    function isJsxOpeningElement(node: Node): node is JsxOpeningElement;
-    function isJsxClosingElement(node: Node): node is JsxClosingElement;
     function isJsxTagNameExpression(node: Node): node is JsxTagNameExpression;
     function isJsxChild(node: Node): node is JsxChild;
     function isJsxAttributeLike(node: Node): node is JsxAttributeLike;
-    function isJsxSpreadAttribute(node: Node): node is JsxSpreadAttribute;
-    function isJsxAttribute(node: Node): node is JsxAttribute;
     function isStringLiteralOrJsxExpression(node: Node): node is StringLiteral | JsxExpression;
+    function isJsxOpeningLikeElement(node: Node): node is JsxOpeningLikeElement;
     function isCaseOrDefaultClause(node: Node): node is CaseOrDefaultClause;
-    function isHeritageClause(node: Node): node is HeritageClause;
-    function isCatchClause(node: Node): node is CatchClause;
-    function isPropertyAssignment(node: Node): node is PropertyAssignment;
-    function isShorthandPropertyAssignment(node: Node): node is ShorthandPropertyAssignment;
-    function isEnumMember(node: Node): node is EnumMember;
-    function isSourceFile(node: Node): node is SourceFile;
-    function isWatchSet(options: CompilerOptions): boolean;
-}
-declare namespace ts {
-    function getDefaultLibFileName(options: CompilerOptions): string;
-    function textSpanEnd(span: TextSpan): number;
-    function textSpanIsEmpty(span: TextSpan): boolean;
-    function textSpanContainsPosition(span: TextSpan, position: number): boolean;
-    function textSpanContainsTextSpan(span: TextSpan, other: TextSpan): boolean;
-    function textSpanOverlapsWith(span: TextSpan, other: TextSpan): boolean;
-    function textSpanOverlap(span1: TextSpan, span2: TextSpan): TextSpan;
-    function textSpanIntersectsWithTextSpan(span: TextSpan, other: TextSpan): boolean;
-    function textSpanIntersectsWith(span: TextSpan, start: number, length: number): boolean;
-    function decodedTextSpanIntersectsWith(start1: number, length1: number, start2: number, length2: number): boolean;
-    function textSpanIntersectsWithPosition(span: TextSpan, position: number): boolean;
-    function textSpanIntersection(span1: TextSpan, span2: TextSpan): TextSpan;
-    function createTextSpan(start: number, length: number): TextSpan;
-    function createTextSpanFromBounds(start: number, end: number): TextSpan;
-    function textChangeRangeNewSpan(range: TextChangeRange): TextSpan;
-    function textChangeRangeIsUnchanged(range: TextChangeRange): boolean;
-    function createTextChangeRange(span: TextSpan, newLength: number): TextChangeRange;
-    let unchangedTextChangeRange: TextChangeRange;
-    /**
-     * Called to merge all the changes that occurred across several versions of a script snapshot
-     * into a single change.  i.e. if a user keeps making successive edits to a script we will
-     * have a text change from V1 to V2, V2 to V3, ..., Vn.
-     *
-     * This function will then merge those changes into a single change range valid between V1 and
-     * Vn.
-     */
-    function collapseTextChangeRangesAcrossMultipleVersions(changes: TextChangeRange[]): TextChangeRange;
-    function getTypeParameterOwner(d: Declaration): Declaration;
-    function isParameterPropertyDeclaration(node: ParameterDeclaration): boolean;
-    function getCombinedModifierFlags(node: Node): ModifierFlags;
-    function getCombinedNodeFlags(node: Node): NodeFlags;
+    /** True if node is of some JSDoc syntax kind. */
+    function isJSDocNode(node: Node): boolean;
+    /** True if node is of a kind that may contain comment text. */
+    function isJSDocCommentContainingNode(node: Node): boolean;
+    function isJSDocTag(node: Node): boolean;
 }
 declare namespace ts {
-    var Diagnostics: {
+    const Diagnostics: {
         Unterminated_string_literal: {
             code: number;
             category: DiagnosticCategory;
@@ -3662,7 +4938,7 @@ declare namespace ts {
             key: string;
             message: string;
         };
-        Type_0_is_not_a_valid_async_function_return_type: {
+        Type_0_is_not_a_valid_async_function_return_type_in_ES5_SlashES3_because_it_does_not_refer_to_a_Promise_compatible_constructor_value: {
             code: number;
             category: DiagnosticCategory;
             key: string;
@@ -3680,19 +4956,19 @@ declare namespace ts {
             key: string;
             message: string;
         };
-        Operand_for_await_does_not_have_a_valid_callable_then_member: {
+        The_return_type_of_an_async_function_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Return_expression_in_async_function_does_not_have_a_valid_callable_then_member: {
+        A_promise_must_have_a_then_method: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Expression_body_for_async_arrow_function_does_not_have_a_valid_callable_then_member: {
+        The_first_parameter_of_the_then_method_of_a_promise_must_be_a_callback: {
             code: number;
             category: DiagnosticCategory;
             key: string;
@@ -3704,7 +4980,7 @@ declare namespace ts {
             key: string;
             message: string;
         };
-        _0_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method: {
+        Type_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method: {
             code: number;
             category: DiagnosticCategory;
             key: string;
@@ -3758,7 +5034,7 @@ declare namespace ts {
             key: string;
             message: string;
         };
-        Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher: {
+        Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher_Use_the_syntax_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
@@ -3854,6 +5130,12 @@ declare namespace ts {
             key: string;
             message: string;
         };
+        A_for_await_of_statement_is_only_allowed_within_an_async_function_or_async_generator: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
         A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement: {
             code: number;
             category: DiagnosticCategory;
@@ -4322,12 +5604,6 @@ declare namespace ts {
             key: string;
             message: string;
         };
-        Catch_clause_variable_name_must_be_an_identifier: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
         Catch_clause_variable_cannot_have_a_type_annotation: {
             code: number;
             category: DiagnosticCategory;
@@ -4370,6 +5646,12 @@ declare namespace ts {
             key: string;
             message: string;
         };
+        Cannot_re_export_a_type_when_the_isolatedModules_flag_is_provided: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
         Decorators_are_not_valid_here: {
             code: number;
             category: DiagnosticCategory;
@@ -4430,6 +5712,12 @@ declare namespace ts {
             key: string;
             message: string;
         };
+        Identifier_expected_esModule_is_reserved_as_an_exported_marker_when_transforming_ECMAScript_modules: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
         Export_assignment_is_not_supported_when_module_flag_is_system: {
             code: number;
             category: DiagnosticCategory;
@@ -4700,97 +5988,163 @@ declare namespace ts {
             key: string;
             message: string;
         };
-        Duplicate_identifier_0: {
+        An_abstract_accessor_cannot_have_an_implementation: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor: {
+        A_default_export_can_only_be_used_in_an_ECMAScript_style_module: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Static_members_cannot_reference_class_type_parameters: {
+        Type_of_await_operand_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Circular_definition_of_import_alias_0: {
+        Type_of_yield_operand_in_an_async_generator_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Cannot_find_name_0: {
+        Type_of_iterated_elements_of_a_yield_Asterisk_operand_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Module_0_has_no_exported_member_1: {
+        Dynamic_import_cannot_be_used_when_targeting_ECMAScript_2015_modules: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        File_0_is_not_a_module: {
+        Dynamic_import_must_have_one_specifier_as_an_argument: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Cannot_find_module_0: {
+        Specifier_of_dynamic_import_cannot_be_spread_element: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambiguity: {
+        Dynamic_import_cannot_have_type_arguments: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements: {
+        String_literal_with_double_quotes_expected: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Type_0_recursively_references_itself_as_a_base_type: {
+        Property_value_can_only_be_string_literal_numeric_literal_true_false_null_object_literal_or_array_literal: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        A_class_may_only_extend_another_class: {
+        Duplicate_identifier_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        An_interface_may_only_extend_a_class_or_another_interface: {
+        Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Type_parameter_0_has_a_circular_constraint: {
+        Static_members_cannot_reference_class_type_parameters: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Generic_type_0_requires_1_type_argument_s: {
+        Circular_definition_of_import_alias_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Type_0_is_not_generic: {
+        Cannot_find_name_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Module_0_has_no_exported_member_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        File_0_is_not_a_module: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Cannot_find_module_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambiguity: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Type_0_recursively_references_itself_as_a_base_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_class_may_only_extend_another_class: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        An_interface_may_only_extend_a_class_or_another_interface: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Type_parameter_0_has_a_circular_constraint: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Generic_type_0_requires_1_type_argument_s: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Type_0_is_not_generic: {
             code: number;
             category: DiagnosticCategory;
             key: string;
@@ -4958,6 +6312,12 @@ declare namespace ts {
             key: string;
             message: string;
         };
+        This_syntax_requires_an_imported_helper_named_1_but_module_0_has_no_exported_member_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
         Type_0_does_not_satisfy_the_constraint_1: {
             code: number;
             category: DiagnosticCategory;
@@ -4970,7 +6330,7 @@ declare namespace ts {
             key: string;
             message: string;
         };
-        Supplied_parameters_do_not_match_any_signature_of_call_target: {
+        Call_target_does_not_contain_any_signatures: {
             code: number;
             category: DiagnosticCategory;
             key: string;
@@ -5018,6 +6378,12 @@ declare namespace ts {
             key: string;
             message: string;
         };
+        This_syntax_requires_an_imported_helper_but_module_0_cannot_be_found: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
         A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value: {
             code: number;
             category: DiagnosticCategory;
@@ -5030,7 +6396,7 @@ declare namespace ts {
             key: string;
             message: string;
         };
-        The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer: {
+        The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_or_a_property_access: {
             code: number;
             category: DiagnosticCategory;
             key: string;
@@ -5072,7 +6438,7 @@ declare namespace ts {
             key: string;
             message: string;
         };
-        Invalid_left_hand_side_of_assignment_expression: {
+        The_left_hand_side_of_an_assignment_expression_must_be_a_variable_or_a_property_access: {
             code: number;
             category: DiagnosticCategory;
             key: string;
@@ -5312,7 +6678,7 @@ declare namespace ts {
             key: string;
             message: string;
         };
-        Invalid_left_hand_side_in_for_in_statement: {
+        The_left_hand_side_of_a_for_in_statement_must_be_a_variable_or_a_property_access: {
             code: number;
             category: DiagnosticCategory;
             key: string;
@@ -5540,13 +6906,13 @@ declare namespace ts {
             key: string;
             message: string;
         };
-        The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property: {
+        Class_0_used_before_its_declaration: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property: {
+        Enum_0_used_before_its_declaration: {
             code: number;
             category: DiagnosticCategory;
             key: string;
@@ -5618,7 +6984,7 @@ declare namespace ts {
             key: string;
             message: string;
         };
-        A_rest_element_must_be_last_in_an_array_destructuring_pattern: {
+        A_rest_element_must_be_last_in_a_destructuring_pattern: {
             code: number;
             category: DiagnosticCategory;
             key: string;
@@ -5750,19 +7116,7 @@ declare namespace ts {
             key: string;
             message: string;
         };
-        The_left_hand_side_of_a_for_of_statement_cannot_be_a_constant_or_a_read_only_property: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        The_left_hand_side_of_a_for_in_statement_cannot_be_a_constant_or_a_read_only_property: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Invalid_left_hand_side_in_for_of_statement: {
+        The_left_hand_side_of_a_for_of_statement_must_be_a_variable_or_a_property_access: {
             code: number;
             category: DiagnosticCategory;
             key: string;
@@ -5864,6 +7218,12 @@ declare namespace ts {
             key: string;
             message: string;
         };
+        Type_must_have_a_Symbol_asyncIterator_method_that_returns_an_async_iterator: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
         A_generator_cannot_have_a_void_type_annotation: {
             code: number;
             category: DiagnosticCategory;
@@ -5948,6 +7308,12 @@ declare namespace ts {
             key: string;
             message: string;
         };
+        An_async_iterator_must_have_a_next_method: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
         Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions: {
             code: number;
             category: DiagnosticCategory;
@@ -6044,2300 +7410,3475 @@ declare namespace ts {
             key: string;
             message: string;
         };
-        JSX_element_attributes_type_0_may_not_be_a_union_type: {
+        Type_0_cannot_be_used_to_index_type_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        The_return_type_of_a_JSX_element_constructor_must_return_an_object_type: {
+        Type_0_has_no_matching_index_signature_for_type_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist: {
+        Type_0_cannot_be_used_as_an_index_type: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Property_0_in_type_1_is_not_assignable_to_type_2: {
+        Cannot_assign_to_0_because_it_is_not_a_variable: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        JSX_element_type_0_does_not_have_any_construct_or_call_signatures: {
+        Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements: {
+        The_target_of_an_assignment_must_be_a_variable_or_a_property_access: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property: {
+        Index_signature_in_type_0_only_permits_reading: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property: {
+        Duplicate_identifier_newTarget_Compiler_uses_variable_declaration_newTarget_to_capture_new_target_meta_property_reference: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        The_global_type_JSX_0_may_not_have_more_than_one_property: {
+        Expression_resolves_to_variable_declaration_newTarget_that_compiler_uses_to_capture_new_target_meta_property_reference: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Cannot_emit_namespaced_JSX_elements_in_React: {
+        A_mixin_class_must_have_a_constructor_with_a_single_rest_parameter_of_type_any: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums: {
+        Property_0_has_conflicting_declarations_and_is_inaccessible_in_type_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead: {
+        The_type_returned_by_the_next_method_of_an_async_iterator_must_be_a_promise_for_a_type_with_a_value_property: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1: {
+        Type_0_is_not_an_array_type_or_does_not_have_a_Symbol_iterator_method_that_returns_an_iterator: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Exported_external_package_typings_file_cannot_contain_tripleslash_references_Please_contact_the_package_author_to_update_the_package_definition: {
+        Type_0_is_not_an_array_type_or_a_string_type_or_does_not_have_a_Symbol_iterator_method_that_returns_an_iterator: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Exported_external_package_typings_file_0_is_not_a_module_Please_contact_the_package_author_to_update_the_package_definition: {
+        Generic_type_instantiation_is_excessively_deep_and_possibly_infinite: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        JSX_expressions_must_have_one_parent_element: {
+        Property_0_does_not_exist_on_type_1_Did_you_mean_2: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Type_0_provides_no_match_for_the_signature_1: {
+        Cannot_find_name_0_Did_you_mean_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_higher: {
+        Computed_values_are_not_permitted_in_an_enum_with_string_valued_members: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions: {
+        Expected_0_arguments_but_got_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module: {
+        Expected_at_least_0_arguments_but_got_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Cannot_find_name_0_Did_you_mean_the_static_member_1_0: {
+        Expected_0_arguments_but_got_a_minimum_of_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Cannot_find_name_0_Did_you_mean_the_instance_member_this_0: {
+        Expected_at_least_0_arguments_but_got_a_minimum_of_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Invalid_module_name_in_augmentation_module_0_cannot_be_found: {
+        Expected_0_type_arguments_but_got_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Exports_and_export_assignments_are_not_permitted_in_module_augmentations: {
+        Type_0_has_no_properties_in_common_with_type_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_module: {
+        JSX_element_attributes_type_0_may_not_be_a_union_type: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always_visible: {
+        The_return_type_of_a_JSX_element_constructor_must_return_an_object_type: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations: {
+        JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambient_context: {
+        Property_0_in_type_1_is_not_assignable_to_type_2: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity: {
+        JSX_element_type_0_does_not_have_any_construct_or_call_signatures: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Cannot_assign_a_0_constructor_type_to_a_1_constructor_type: {
+        JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration: {
+        Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration: {
+        JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Cannot_extend_a_class_0_Class_constructor_is_marked_as_private: {
+        The_global_type_JSX_0_may_not_have_more_than_one_property: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Accessors_must_both_be_abstract_or_non_abstract: {
+        JSX_spread_child_must_be_an_array_type: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type: {
+        Cannot_augment_module_0_with_value_exports_because_it_resolves_to_a_non_module_entity: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Type_0_is_not_comparable_to_type_1: {
+        A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        A_function_that_is_called_with_the_new_keyword_cannot_have_a_this_type_that_is_void: {
+        Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        A_this_parameter_must_be_the_first_parameter: {
+        Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        A_constructor_cannot_have_a_this_parameter: {
+        Exported_external_package_typings_file_cannot_contain_tripleslash_references_Please_contact_the_package_author_to_update_the_package_definition: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        get_and_set_accessor_must_have_the_same_this_type: {
+        Exported_external_package_typings_file_0_is_not_a_module_Please_contact_the_package_author_to_update_the_package_definition: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation: {
+        JSX_expressions_must_have_one_parent_element: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1: {
+        Type_0_provides_no_match_for_the_signature_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        The_this_types_of_each_signature_are_incompatible: {
+        super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_higher: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Identifier_0_must_be_imported_from_a_module: {
+        super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        All_declarations_of_0_must_have_identical_modifiers: {
+        Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Cannot_find_type_definition_file_for_0: {
+        Cannot_find_name_0_Did_you_mean_the_static_member_1_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Cannot_extend_an_interface_0_Did_you_mean_implements: {
+        Cannot_find_name_0_Did_you_mean_the_instance_member_this_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        A_class_must_be_declared_after_its_base_class: {
+        Invalid_module_name_in_augmentation_module_0_cannot_be_found: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        An_import_path_cannot_end_with_a_0_extension_Consider_importing_1_instead: {
+        Invalid_module_name_in_augmentation_Module_0_resolves_to_an_untyped_module_at_1_which_cannot_be_augmented: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        _0_is_a_primitive_but_1_is_a_wrapper_object_Prefer_using_0_when_possible: {
+        Exports_and_export_assignments_are_not_permitted_in_module_augmentations: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        _0_only_refers_to_a_type_but_is_being_used_as_a_value_here: {
+        Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_module: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Namespace_0_has_no_exported_member_1: {
+        export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always_visible: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Left_side_of_comma_operator_is_unused_and_has_no_side_effects: {
+        Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        The_Object_type_is_assignable_to_very_few_other_types_Did_you_mean_to_use_the_any_type_instead: {
+        Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambient_context: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Import_declaration_0_is_using_private_name_1: {
+        Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Type_parameter_0_of_exported_class_has_or_is_using_private_name_1: {
+        Cannot_assign_a_0_constructor_type_to_a_1_constructor_type: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1: {
+        Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Type_parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1: {
+        Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Type_parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1: {
+        Cannot_extend_a_class_0_Class_constructor_is_marked_as_private: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Type_parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1: {
+        Accessors_must_both_be_abstract_or_non_abstract: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Type_parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1: {
+        A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1: {
+        Type_0_is_not_comparable_to_type_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Type_parameter_0_of_exported_function_has_or_is_using_private_name_1: {
+        A_function_that_is_called_with_the_new_keyword_cannot_have_a_this_type_that_is_void: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Implements_clause_of_exported_class_0_has_or_is_using_private_name_1: {
+        A_this_parameter_must_be_the_first_parameter: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Extends_clause_of_exported_class_0_has_or_is_using_private_name_1: {
+        A_constructor_cannot_have_a_this_parameter: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Extends_clause_of_exported_interface_0_has_or_is_using_private_name_1: {
+        get_and_set_accessor_must_have_the_same_this_type: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: {
+        this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Exported_variable_0_has_or_is_using_name_1_from_private_module_2: {
+        The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Exported_variable_0_has_or_is_using_private_name_1: {
+        The_this_types_of_each_signature_are_incompatible: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: {
+        _0_refers_to_a_UMD_global_but_the_current_file_is_a_module_Consider_adding_an_import_instead: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2: {
+        All_declarations_of_0_must_have_identical_modifiers: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Public_static_property_0_of_exported_class_has_or_is_using_private_name_1: {
+        Cannot_find_type_definition_file_for_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: {
+        Cannot_extend_an_interface_0_Did_you_mean_implements: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Public_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2: {
+        An_import_path_cannot_end_with_a_0_extension_Consider_importing_1_instead: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Public_property_0_of_exported_class_has_or_is_using_private_name_1: {
+        _0_is_a_primitive_but_1_is_a_wrapper_object_Prefer_using_0_when_possible: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Property_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2: {
+        _0_only_refers_to_a_type_but_is_being_used_as_a_value_here: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Property_0_of_exported_interface_has_or_is_using_private_name_1: {
+        Namespace_0_has_no_exported_member_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2: {
+        Left_side_of_comma_operator_is_unused_and_has_no_side_effects: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_private_name_1: {
+        The_Object_type_is_assignable_to_very_few_other_types_Did_you_mean_to_use_the_any_type_instead: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2: {
+        An_async_function_or_method_must_return_a_Promise_Make_sure_you_have_a_declaration_for_Promise_or_include_ES2015_in_your_lib_option: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_private_name_1: {
+        Spread_types_may_only_be_created_from_object_types: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: {
+        Static_property_0_conflicts_with_built_in_property_Function_0_of_constructor_function_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1: {
+        Rest_types_may_only_be_created_from_object_types: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_private_name_0: {
+        The_target_of_an_object_rest_assignment_must_be_a_variable_or_a_property_access: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: {
+        _0_only_refers_to_a_type_but_is_being_used_as_a_namespace_here: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1: {
+        The_operand_of_a_delete_operator_must_be_a_property_reference: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Return_type_of_public_property_getter_from_exported_class_has_or_is_using_private_name_0: {
+        The_operand_of_a_delete_operator_cannot_be_a_read_only_property: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: {
+        An_async_function_or_method_in_ES5_SlashES3_requires_the_Promise_constructor_Make_sure_you_have_a_declaration_for_the_Promise_constructor_or_include_ES2015_in_your_lib_option: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_0: {
+        Required_type_parameters_may_not_follow_optional_type_parameters: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Return_type_of_call_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: {
+        Generic_type_0_requires_between_1_and_2_type_arguments: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Return_type_of_call_signature_from_exported_interface_has_or_is_using_private_name_0: {
+        Cannot_use_namespace_0_as_a_value: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Return_type_of_index_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: {
+        Cannot_use_namespace_0_as_a_type: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Return_type_of_index_signature_from_exported_interface_has_or_is_using_private_name_0: {
+        _0_are_specified_twice_The_attribute_named_0_will_be_overwritten: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: {
+        A_dynamic_import_call_returns_a_Promise_Make_sure_you_have_a_declaration_for_Promise_or_include_ES2015_in_your_lib_option: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_private_module_1: {
+        A_dynamic_import_call_in_ES5_SlashES3_requires_the_Promise_constructor_Make_sure_you_have_a_declaration_for_the_Promise_constructor_or_include_ES2015_in_your_lib_option: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Return_type_of_public_static_method_from_exported_class_has_or_is_using_private_name_0: {
+        Import_declaration_0_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: {
+        Type_parameter_0_of_exported_class_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_private_module_1: {
+        Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Return_type_of_public_method_from_exported_class_has_or_is_using_private_name_0: {
+        Type_parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Return_type_of_method_from_exported_interface_has_or_is_using_name_0_from_private_module_1: {
+        Type_parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Return_type_of_method_from_exported_interface_has_or_is_using_private_name_0: {
+        Type_parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Return_type_of_exported_function_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: {
+        Type_parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Return_type_of_exported_function_has_or_is_using_name_0_from_private_module_1: {
+        Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Return_type_of_exported_function_has_or_is_using_private_name_0: {
+        Type_parameter_0_of_exported_function_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: {
+        Implements_clause_of_exported_class_0_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_private_module_2: {
+        extends_clause_of_exported_class_0_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Parameter_0_of_constructor_from_exported_class_has_or_is_using_private_name_1: {
+        extends_clause_of_exported_interface_0_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2: {
+        Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1: {
+        Exported_variable_0_has_or_is_using_name_1_from_private_module_2: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2: {
+        Exported_variable_0_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1: {
+        Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: {
+        Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_private_module_2: {
+        Public_static_property_0_of_exported_class_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1: {
+        Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: {
+        Public_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_private_module_2: {
+        Public_property_0_of_exported_class_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1: {
+        Property_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Parameter_0_of_method_from_exported_interface_has_or_is_using_name_1_from_private_module_2: {
+        Property_0_of_exported_interface_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1: {
+        Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Parameter_0_of_exported_function_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: {
+        Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Parameter_0_of_exported_function_has_or_is_using_name_1_from_private_module_2: {
+        Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Parameter_0_of_exported_function_has_or_is_using_private_name_1: {
+        Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Exported_type_alias_0_has_or_is_using_private_name_1: {
+        Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Default_export_of_the_module_has_or_is_using_private_name_0: {
+        Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Conflicting_definitions_for_0_found_at_1_and_2_Consider_installing_a_specific_version_of_this_library_to_resolve_the_conflict: {
+        Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_private_name_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        The_current_host_does_not_support_the_0_option: {
+        Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Cannot_find_the_common_subdirectory_path_for_the_input_files: {
+        Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        File_specification_cannot_end_in_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0: {
+        Return_type_of_public_property_getter_from_exported_class_has_or_is_using_private_name_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        File_specification_cannot_contain_multiple_recursive_directory_wildcards_Asterisk_Asterisk_Colon_0: {
+        Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Cannot_read_file_0_Colon_1: {
+        Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Unsupported_file_encoding: {
+        Return_type_of_call_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Failed_to_parse_file_0_Colon_1: {
+        Return_type_of_call_signature_from_exported_interface_has_or_is_using_private_name_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Unknown_compiler_option_0: {
+        Return_type_of_index_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Compiler_option_0_requires_a_value_of_type_1: {
+        Return_type_of_index_signature_from_exported_interface_has_or_is_using_private_name_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Could_not_write_file_0_Colon_1: {
+        Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Option_project_cannot_be_mixed_with_source_files_on_a_command_line: {
+        Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_private_module_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES2015_or_higher: {
+        Return_type_of_public_static_method_from_exported_class_has_or_is_using_private_name_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided: {
+        Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Option_0_cannot_be_specified_without_specifying_option_1: {
+        Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_private_module_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Option_0_cannot_be_specified_with_option_1: {
+        Return_type_of_public_method_from_exported_class_has_or_is_using_private_name_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        A_tsconfig_json_file_is_already_defined_at_Colon_0: {
+        Return_type_of_method_from_exported_interface_has_or_is_using_name_0_from_private_module_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Cannot_write_file_0_because_it_would_overwrite_input_file: {
+        Return_type_of_method_from_exported_interface_has_or_is_using_private_name_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files: {
+        Return_type_of_exported_function_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Cannot_find_a_tsconfig_json_file_at_the_specified_directory_Colon_0: {
+        Return_type_of_exported_function_has_or_is_using_name_0_from_private_module_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        The_specified_path_does_not_exist_Colon_0: {
+        Return_type_of_exported_function_has_or_is_using_private_name_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier: {
+        Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Option_paths_cannot_be_used_without_specifying_baseUrl_option: {
+        Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_private_module_2: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Pattern_0_can_have_at_most_one_Asterisk_character: {
+        Parameter_0_of_constructor_from_exported_class_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character: {
+        Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Substitutions_for_pattern_0_should_be_an_array: {
+        Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2: {
+        Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        File_specification_cannot_contain_a_parent_directory_that_appears_after_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0: {
+        Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Substitutions_for_pattern_0_shouldn_t_be_an_empty_array: {
+        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Concatenate_and_emit_output_to_single_file: {
+        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_private_module_2: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Generates_corresponding_d_ts_file: {
+        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations: {
+        Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Specify_the_location_where_debugger_should_locate_TypeScript_files_instead_of_source_locations: {
+        Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_private_module_2: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Watch_input_files: {
+        Parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Redirect_output_structure_to_the_directory: {
+        Parameter_0_of_method_from_exported_interface_has_or_is_using_name_1_from_private_module_2: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Do_not_erase_const_enum_declarations_in_generated_code: {
+        Parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Do_not_emit_outputs_if_any_errors_were_reported: {
+        Parameter_0_of_exported_function_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Do_not_emit_comments_to_output: {
+        Parameter_0_of_exported_function_has_or_is_using_name_1_from_private_module_2: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Do_not_emit_outputs: {
+        Parameter_0_of_exported_function_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typechecking: {
+        Exported_type_alias_0_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Skip_type_checking_of_declaration_files: {
+        Default_export_of_the_module_has_or_is_using_private_name_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015: {
+        Type_parameter_0_of_exported_type_alias_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015: {
+        Conflicting_definitions_for_0_found_at_1_and_2_Consider_installing_a_specific_version_of_this_library_to_resolve_the_conflict: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Print_this_message: {
+        Parameter_0_of_index_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Print_the_compiler_s_version: {
+        Parameter_0_of_index_signature_from_exported_interface_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Compile_the_project_in_the_given_directory: {
+        Property_0_of_exported_class_expression_may_not_be_private_or_protected: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Syntax_Colon_0: {
+        The_current_host_does_not_support_the_0_option: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        options: {
+        Cannot_find_the_common_subdirectory_path_for_the_input_files: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        file: {
+        File_specification_cannot_end_in_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Examples_Colon_0: {
+        File_specification_cannot_contain_multiple_recursive_directory_wildcards_Asterisk_Asterisk_Colon_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Options_Colon: {
+        Cannot_read_file_0_Colon_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Version_0: {
+        Failed_to_parse_file_0_Colon_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Insert_command_line_options_and_files_from_a_file: {
+        Unknown_compiler_option_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        File_change_detected_Starting_incremental_compilation: {
+        Compiler_option_0_requires_a_value_of_type_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        KIND: {
+        Could_not_write_file_0_Colon_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        FILE: {
+        Option_project_cannot_be_mixed_with_source_files_on_a_command_line: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        VERSION: {
+        Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES2015_or_higher: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        LOCATION: {
+        Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        DIRECTORY: {
+        Option_0_cannot_be_specified_without_specifying_option_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        STRATEGY: {
+        Option_0_cannot_be_specified_with_option_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Compilation_complete_Watching_for_file_changes: {
+        A_tsconfig_json_file_is_already_defined_at_Colon_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Generates_corresponding_map_file: {
+        Cannot_write_file_0_because_it_would_overwrite_input_file: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Compiler_option_0_expects_an_argument: {
+        Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Unterminated_quoted_string_in_response_file_0: {
+        Cannot_find_a_tsconfig_json_file_at_the_specified_directory_Colon_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Argument_for_0_option_must_be_Colon_1: {
+        The_specified_path_does_not_exist_Colon_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Locale_must_be_of_the_form_language_or_language_territory_For_example_0_or_1: {
+        Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Unsupported_locale_0: {
+        Option_paths_cannot_be_used_without_specifying_baseUrl_option: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Unable_to_open_file_0: {
+        Pattern_0_can_have_at_most_one_Asterisk_character: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Corrupted_locale_file_0: {
+        Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Raise_error_on_expressions_and_declarations_with_an_implied_any_type: {
+        Substitutions_for_pattern_0_should_be_an_array: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        File_0_not_found: {
+        Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        File_0_has_unsupported_extension_The_only_supported_extensions_are_1: {
+        File_specification_cannot_contain_a_parent_directory_that_appears_after_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Suppress_noImplicitAny_errors_for_indexing_objects_lacking_index_signatures: {
+        Substitutions_for_pattern_0_shouldn_t_be_an_empty_array: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Do_not_emit_declarations_for_code_that_has_an_internal_annotation: {
+        Invalid_value_for_jsxFactory_0_is_not_a_valid_identifier_or_qualified_name: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Specify_the_root_directory_of_input_files_Use_to_control_the_output_directory_structure_with_outDir: {
+        Concatenate_and_emit_output_to_single_file: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        File_0_is_not_under_rootDir_1_rootDir_is_expected_to_contain_all_source_files: {
+        Generates_corresponding_d_ts_file: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Specify_the_end_of_line_sequence_to_be_used_when_emitting_files_Colon_CRLF_dos_or_LF_unix: {
+        Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        NEWLINE: {
+        Specify_the_location_where_debugger_should_locate_TypeScript_files_instead_of_source_locations: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Option_0_can_only_be_specified_in_tsconfig_json_file: {
+        Watch_input_files: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Enables_experimental_support_for_ES7_decorators: {
+        Redirect_output_structure_to_the_directory: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Enables_experimental_support_for_emitting_type_metadata_for_decorators: {
+        Do_not_erase_const_enum_declarations_in_generated_code: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Enables_experimental_support_for_ES7_async_functions: {
+        Do_not_emit_outputs_if_any_errors_were_reported: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Specify_module_resolution_strategy_Colon_node_Node_js_or_classic_TypeScript_pre_1_6: {
+        Do_not_emit_comments_to_output: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file: {
+        Do_not_emit_outputs: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Successfully_created_a_tsconfig_json_file: {
+        Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typechecking: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Suppress_excess_property_checks_for_object_literals: {
+        Skip_type_checking_of_declaration_files: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Stylize_errors_and_messages_using_color_and_context_experimental: {
+        Specify_ECMAScript_target_version_Colon_ES3_default_ES5_ES2015_ES2016_ES2017_or_ESNEXT: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Do_not_report_errors_on_unused_labels: {
+        Specify_module_code_generation_Colon_commonjs_amd_system_umd_es2015_or_ESNext: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Report_error_when_not_all_code_paths_in_function_return_a_value: {
+        Print_this_message: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Report_errors_for_fallthrough_cases_in_switch_statement: {
+        Print_the_compiler_s_version: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Do_not_report_errors_on_unreachable_code: {
+        Compile_the_project_given_the_path_to_its_configuration_file_or_to_a_folder_with_a_tsconfig_json: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Disallow_inconsistently_cased_references_to_the_same_file: {
+        Syntax_Colon_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Specify_library_files_to_be_included_in_the_compilation_Colon: {
+        options: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Specify_JSX_code_generation_Colon_preserve_or_react: {
+        file: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Only_amd_and_system_modules_are_supported_alongside_0: {
+        Examples_Colon_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Base_directory_to_resolve_non_absolute_module_names: {
+        Options_Colon: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Specify_the_object_invoked_for_createElement_and_spread_when_targeting_react_JSX_emit: {
+        Version_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Enable_tracing_of_the_name_resolution_process: {
+        Insert_command_line_options_and_files_from_a_file: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Resolving_module_0_from_1: {
+        File_change_detected_Starting_incremental_compilation: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Explicitly_specified_module_resolution_kind_Colon_0: {
+        KIND: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Module_resolution_kind_is_not_specified_using_0: {
+        FILE: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Module_name_0_was_successfully_resolved_to_1: {
+        VERSION: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Module_name_0_was_not_resolved: {
+        LOCATION: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        paths_option_is_specified_looking_for_a_pattern_to_match_module_name_0: {
+        DIRECTORY: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Module_name_0_matched_pattern_1: {
+        STRATEGY: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Trying_substitution_0_candidate_module_location_Colon_1: {
+        FILE_OR_DIRECTORY: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Resolving_module_name_0_relative_to_base_url_1_2: {
+        Compilation_complete_Watching_for_file_changes: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Loading_module_as_file_Slash_folder_candidate_module_location_0: {
+        Generates_corresponding_map_file: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        File_0_does_not_exist: {
+        Compiler_option_0_expects_an_argument: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        File_0_exist_use_it_as_a_name_resolution_result: {
+        Unterminated_quoted_string_in_response_file_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Loading_module_0_from_node_modules_folder: {
+        Argument_for_0_option_must_be_Colon_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Found_package_json_at_0: {
+        Locale_must_be_of_the_form_language_or_language_territory_For_example_0_or_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        package_json_does_not_have_types_field: {
+        Unsupported_locale_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        package_json_has_0_field_1_that_references_2: {
+        Unable_to_open_file_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Allow_javascript_files_to_be_compiled: {
+        Corrupted_locale_file_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Option_0_should_have_array_of_strings_as_a_value: {
+        Raise_error_on_expressions_and_declarations_with_an_implied_any_type: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Checking_if_0_is_the_longest_matching_prefix_for_1_2: {
+        File_0_not_found: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Expected_type_of_0_field_in_package_json_to_be_string_got_1: {
+        File_0_has_unsupported_extension_The_only_supported_extensions_are_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1: {
+        Suppress_noImplicitAny_errors_for_indexing_objects_lacking_index_signatures: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0: {
+        Do_not_emit_declarations_for_code_that_has_an_internal_annotation: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Longest_matching_prefix_for_0_is_1: {
+        Specify_the_root_directory_of_input_files_Use_to_control_the_output_directory_structure_with_outDir: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Loading_0_from_the_root_dir_1_candidate_location_2: {
+        File_0_is_not_under_rootDir_1_rootDir_is_expected_to_contain_all_source_files: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Trying_other_entries_in_rootDirs: {
+        Specify_the_end_of_line_sequence_to_be_used_when_emitting_files_Colon_CRLF_dos_or_LF_unix: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Module_resolution_using_rootDirs_has_failed: {
+        NEWLINE: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Do_not_emit_use_strict_directives_in_module_output: {
+        Option_0_can_only_be_specified_in_tsconfig_json_file: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Enable_strict_null_checks: {
+        Enables_experimental_support_for_ES7_decorators: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Unknown_option_excludes_Did_you_mean_exclude: {
+        Enables_experimental_support_for_emitting_type_metadata_for_decorators: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Raise_error_on_this_expressions_with_an_implied_any_type: {
+        Enables_experimental_support_for_ES7_async_functions: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Resolving_type_reference_directive_0_containing_file_1_root_directory_2: {
+        Specify_module_resolution_strategy_Colon_node_Node_js_or_classic_TypeScript_pre_1_6: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Resolving_using_primary_search_paths: {
+        Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Resolving_from_node_modules_folder: {
+        Successfully_created_a_tsconfig_json_file: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2: {
+        Suppress_excess_property_checks_for_object_literals: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Type_reference_directive_0_was_not_resolved: {
+        Stylize_errors_and_messages_using_color_and_context_experimental: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Resolving_with_primary_search_path_0: {
+        Do_not_report_errors_on_unused_labels: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Root_directory_cannot_be_determined_skipping_primary_search_paths: {
+        Report_error_when_not_all_code_paths_in_function_return_a_value: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set: {
+        Report_errors_for_fallthrough_cases_in_switch_statement: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Type_declaration_files_to_be_included_in_compilation: {
+        Do_not_report_errors_on_unreachable_code: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Looking_up_in_node_modules_folder_initial_location_0: {
+        Disallow_inconsistently_cased_references_to_the_same_file: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_modules_folder: {
+        Specify_library_files_to_be_included_in_the_compilation_Colon: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1: {
+        Specify_JSX_code_generation_Colon_preserve_react_native_or_react: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set: {
+        File_0_has_an_unsupported_extension_so_skipping_it: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        The_config_file_0_found_doesn_t_contain_any_source_files: {
+        Only_amd_and_system_modules_are_supported_alongside_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Resolving_real_path_for_0_result_1: {
+        Base_directory_to_resolve_non_absolute_module_names: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system: {
+        Deprecated_Use_jsxFactory_instead_Specify_the_object_invoked_for_createElement_when_targeting_react_JSX_emit: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        File_name_0_has_a_1_extension_stripping_it: {
+        Enable_tracing_of_the_name_resolution_process: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        _0_is_declared_but_never_used: {
+        Resolving_module_0_from_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Report_errors_on_unused_locals: {
+        Explicitly_specified_module_resolution_kind_Colon_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Report_errors_on_unused_parameters: {
+        Module_resolution_kind_is_not_specified_using_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        The_maximum_dependency_depth_to_search_under_node_modules_and_load_JavaScript_files: {
+        Module_name_0_was_successfully_resolved_to_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        No_types_specified_in_package_json_but_allowJs_is_set_so_returning_main_value_of_0: {
+        Module_name_0_was_not_resolved: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Property_0_is_declared_but_never_used: {
+        paths_option_is_specified_looking_for_a_pattern_to_match_module_name_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Import_emit_helpers_from_tslib: {
+        Module_name_0_matched_pattern_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Auto_discovery_for_typings_is_enabled_in_project_0_Running_extra_resolution_pass_for_module_1_using_cache_location_2: {
+        Trying_substitution_0_candidate_module_location_Colon_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Variable_0_implicitly_has_an_1_type: {
+        Resolving_module_name_0_relative_to_base_url_1_2: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Parameter_0_implicitly_has_an_1_type: {
+        Loading_module_as_file_Slash_folder_candidate_module_location_0_target_file_type_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Member_0_implicitly_has_an_1_type: {
+        File_0_does_not_exist: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        new_expression_whose_target_lacks_a_construct_signature_implicitly_has_an_any_type: {
+        File_0_exist_use_it_as_a_name_resolution_result: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        _0_which_lacks_return_type_annotation_implicitly_has_an_1_return_type: {
+        Loading_module_0_from_node_modules_folder_target_file_type_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type: {
+        Found_package_json_at_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type: {
+        package_json_does_not_have_a_0_field: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number: {
+        package_json_has_0_field_1_that_references_2: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Index_signature_of_object_type_implicitly_has_an_any_type: {
+        Allow_javascript_files_to_be_compiled: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Object_literal_s_property_0_implicitly_has_an_1_type: {
+        Option_0_should_have_array_of_strings_as_a_value: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Rest_parameter_0_implicitly_has_an_any_type: {
+        Checking_if_0_is_the_longest_matching_prefix_for_1_2: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type: {
+        Expected_type_of_0_field_in_package_json_to_be_string_got_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        _0_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_and_is_referenced_directly_or_indirectly_in_its_own_initializer: {
+        baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        _0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions: {
+        rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions: {
+        Longest_matching_prefix_for_0_is_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_type: {
+        Loading_0_from_the_root_dir_1_candidate_location_2: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists: {
+        Trying_other_entries_in_rootDirs: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Unreachable_code_detected: {
+        Module_resolution_using_rootDirs_has_failed: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Unused_label: {
+        Do_not_emit_use_strict_directives_in_module_output: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Fallthrough_case_in_switch: {
+        Enable_strict_null_checks: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Not_all_code_paths_return_a_value: {
+        Unknown_option_excludes_Did_you_mean_exclude: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Binding_element_0_implicitly_has_an_1_type: {
+        Raise_error_on_this_expressions_with_an_implied_any_type: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_parameter_type_annotation: {
+        Resolving_type_reference_directive_0_containing_file_1_root_directory_2: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Property_0_implicitly_has_type_any_because_its_get_accessor_lacks_a_return_type_annotation: {
+        Resolving_using_primary_search_paths: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        You_cannot_rename_this_element: {
+        Resolving_from_node_modules_folder: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library: {
+        Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        import_can_only_be_used_in_a_ts_file: {
+        Type_reference_directive_0_was_not_resolved: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        export_can_only_be_used_in_a_ts_file: {
+        Resolving_with_primary_search_path_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        type_parameter_declarations_can_only_be_used_in_a_ts_file: {
+        Root_directory_cannot_be_determined_skipping_primary_search_paths: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        implements_clauses_can_only_be_used_in_a_ts_file: {
+        Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        interface_declarations_can_only_be_used_in_a_ts_file: {
+        Type_declaration_files_to_be_included_in_compilation: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        module_declarations_can_only_be_used_in_a_ts_file: {
+        Looking_up_in_node_modules_folder_initial_location_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        type_aliases_can_only_be_used_in_a_ts_file: {
+        Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_modules_folder: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        _0_can_only_be_used_in_a_ts_file: {
+        Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        types_can_only_be_used_in_a_ts_file: {
+        Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        type_arguments_can_only_be_used_in_a_ts_file: {
+        The_config_file_0_found_doesn_t_contain_any_source_files: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        parameter_modifiers_can_only_be_used_in_a_ts_file: {
+        Resolving_real_path_for_0_result_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        enum_declarations_can_only_be_used_in_a_ts_file: {
+        Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        type_assertion_expressions_can_only_be_used_in_a_ts_file: {
+        File_name_0_has_a_1_extension_stripping_it: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Only_identifiers_Slashqualified_names_with_optional_type_arguments_are_currently_supported_in_a_class_extends_clauses: {
+        _0_is_declared_but_never_used: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        class_expressions_are_not_currently_supported: {
+        Report_errors_on_unused_locals: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        JSX_attributes_must_only_be_assigned_a_non_empty_expression: {
+        Report_errors_on_unused_parameters: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        JSX_elements_cannot_have_multiple_attributes_with_the_same_name: {
+        The_maximum_dependency_depth_to_search_under_node_modules_and_load_JavaScript_files: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Expected_corresponding_JSX_closing_tag_for_0: {
+        Cannot_import_type_declaration_files_Consider_importing_0_instead_of_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        JSX_attribute_expected: {
+        Property_0_is_declared_but_never_used: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Cannot_use_JSX_unless_the_jsx_flag_is_provided: {
+        Import_emit_helpers_from_tslib: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        A_constructor_cannot_contain_a_super_call_when_its_class_extends_null: {
+        Auto_discovery_for_typings_is_enabled_in_project_0_Running_extra_resolution_pass_for_module_1_using_cache_location_2: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses: {
+        Parse_in_strict_mode_and_emit_use_strict_for_each_source_file: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses: {
+        Module_0_was_resolved_to_1_but_jsx_is_not_set: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        JSX_element_0_has_no_corresponding_closing_tag: {
+        Module_0_was_resolved_to_1_but_allowJs_is_not_set: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class: {
+        Module_0_was_resolved_as_locally_declared_ambient_module_in_file_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Unknown_typing_option_0: {
+        Module_0_was_resolved_as_ambient_module_declared_in_1_since_this_file_was_not_modified: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Circularity_detected_while_resolving_configuration_Colon_0: {
+        Specify_the_JSX_factory_function_to_use_when_targeting_react_JSX_emit_e_g_React_createElement_or_h: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        The_path_in_an_extends_options_must_be_relative_or_rooted: {
+        Resolution_for_module_0_was_found_in_cache: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-    };
-}
-declare namespace ts {
-    interface ErrorCallback {
-        (message: DiagnosticMessage, length: number): void;
-    }
-    function tokenIsIdentifierOrKeyword(token: SyntaxKind): boolean;
-    interface Scanner {
-        getStartPos(): number;
-        getToken(): SyntaxKind;
-        getTextPos(): number;
-        getTokenPos(): number;
-        getTokenText(): string;
-        getTokenValue(): string;
-        hasExtendedUnicodeEscape(): boolean;
-        hasPrecedingLineBreak(): boolean;
-        isIdentifier(): boolean;
-        isReservedWord(): boolean;
-        isUnterminated(): boolean;
-        reScanGreaterToken(): SyntaxKind;
-        reScanSlashToken(): SyntaxKind;
-        reScanTemplateToken(): SyntaxKind;
-        scanJsxIdentifier(): SyntaxKind;
-        scanJsxAttributeValue(): SyntaxKind;
-        reScanJsxToken(): SyntaxKind;
-        scanJsxToken(): SyntaxKind;
-        scanJSDocToken(): SyntaxKind;
-        scan(): SyntaxKind;
-        getText(): string;
-        setText(text: string, start?: number, length?: number): void;
-        setOnError(onError: ErrorCallback): void;
-        setScriptTarget(scriptTarget: ScriptTarget): void;
-        setLanguageVariant(variant: LanguageVariant): void;
-        setTextPos(textPos: number): void;
-        lookAhead<T>(callback: () => T): T;
-        scanRange<T>(start: number, length: number, callback: () => T): T;
-        tryScan<T>(callback: () => T): T;
-    }
-    function isUnicodeIdentifierStart(code: number, languageVersion: ScriptTarget): boolean;
-    function tokenToString(t: SyntaxKind): string;
-    function stringToToken(s: string): SyntaxKind;
-    function computeLineStarts(text: string): number[];
-    function getPositionOfLineAndCharacter(sourceFile: SourceFile, line: number, character: number): number;
-    function computePositionOfLineAndCharacter(lineStarts: number[], line: number, character: number): number;
-    function getLineStarts(sourceFile: SourceFile): number[];
-    /**
-     * We assume the first line starts at position 0 and 'position' is non-negative.
-     */
-    function computeLineAndCharacterOfPosition(lineStarts: number[], position: number): {
-        line: number;
-        character: number;
-    };
-    function getLineAndCharacterOfPosition(sourceFile: SourceFile, position: number): LineAndCharacter;
-    function isWhiteSpace(ch: number): boolean;
-    /** Does not include line breaks. For that, see isWhiteSpaceLike. */
-    function isWhiteSpaceSingleLine(ch: number): boolean;
-    function isLineBreak(ch: number): boolean;
-    function isOctalDigit(ch: number): boolean;
-    function couldStartTrivia(text: string, pos: number): boolean;
-    function skipTrivia(text: string, pos: number, stopAfterLineBreak?: boolean, stopAtComments?: boolean): number;
-    function forEachLeadingCommentRange<T, U>(text: string, pos: number, cb: (pos: number, end: number, kind: SyntaxKind, hasTrailingNewLine: boolean, state: T) => U, state?: T): U;
-    function forEachTrailingCommentRange<T, U>(text: string, pos: number, cb: (pos: number, end: number, kind: SyntaxKind, hasTrailingNewLine: boolean, state: T) => U, state?: T): U;
-    function reduceEachLeadingCommentRange<T, U>(text: string, pos: number, cb: (pos: number, end: number, kind: SyntaxKind, hasTrailingNewLine: boolean, state: T, memo: U) => U, state: T, initial: U): U;
-    function reduceEachTrailingCommentRange<T, U>(text: string, pos: number, cb: (pos: number, end: number, kind: SyntaxKind, hasTrailingNewLine: boolean, state: T, memo: U) => U, state: T, initial: U): U;
-    function getLeadingCommentRanges(text: string, pos: number): CommentRange[];
-    function getTrailingCommentRanges(text: string, pos: number): CommentRange[];
-    /** Optionally, get the shebang */
-    function getShebang(text: string): string;
-    function isIdentifierStart(ch: number, languageVersion: ScriptTarget): boolean;
-    function isIdentifierPart(ch: number, languageVersion: ScriptTarget): boolean;
-    function isIdentifierText(name: string, languageVersion: ScriptTarget): boolean;
-    function createScanner(languageVersion: ScriptTarget, skipTrivia: boolean, languageVariant?: LanguageVariant, text?: string, onError?: ErrorCallback, start?: number, length?: number): Scanner;
-}
-declare namespace ts {
-    function updateNode<T extends Node>(updated: T, original: T): T;
-    function createNodeArray<T extends Node>(elements?: T[], location?: TextRange, hasTrailingComma?: boolean): NodeArray<T>;
-    function createSynthesizedNode(kind: SyntaxKind, startsOnNewLine?: boolean): Node;
-    function createSynthesizedNodeArray<T extends Node>(elements?: T[]): NodeArray<T>;
-    /**
-     * Creates a shallow, memberwise clone of a node with no source map location.
-     */
-    function getSynthesizedClone<T extends Node>(node: T): T;
-    /**
-     * Creates a shallow, memberwise clone of a node for mutation.
-     */
-    function getMutableClone<T extends Node>(node: T): T;
-    function createLiteral(textSource: StringLiteral | Identifier, location?: TextRange): StringLiteral;
-    function createLiteral(value: string, location?: TextRange): StringLiteral;
-    function createLiteral(value: number, location?: TextRange): NumericLiteral;
-    function createLiteral(value: string | number | boolean, location?: TextRange): PrimaryExpression;
-    function createIdentifier(text: string, location?: TextRange): Identifier;
-    function createTempVariable(recordTempVariable: ((node: Identifier) => void) | undefined, location?: TextRange): Identifier;
-    function createLoopVariable(location?: TextRange): Identifier;
-    function createUniqueName(text: string, location?: TextRange): Identifier;
-    function getGeneratedNameForNode(node: Node, location?: TextRange): Identifier;
-    function createToken(token: SyntaxKind): Node;
-    function createSuper(): PrimaryExpression;
-    function createThis(location?: TextRange): PrimaryExpression;
-    function createNull(): PrimaryExpression;
-    function createComputedPropertyName(expression: Expression, location?: TextRange): ComputedPropertyName;
-    function updateComputedPropertyName(node: ComputedPropertyName, expression: Expression): ComputedPropertyName;
-    function createParameter(name: string | Identifier | BindingPattern, initializer?: Expression, location?: TextRange): ParameterDeclaration;
-    function createParameterDeclaration(decorators: Decorator[], modifiers: Modifier[], dotDotDotToken: Node, name: string | Identifier | BindingPattern, questionToken: Node, type: TypeNode, initializer: Expression, location?: TextRange, flags?: NodeFlags): ParameterDeclaration;
-    function updateParameterDeclaration(node: ParameterDeclaration, decorators: Decorator[], modifiers: Modifier[], name: BindingName, type: TypeNode, initializer: Expression): ParameterDeclaration;
-    function createProperty(decorators: Decorator[], modifiers: Modifier[], name: string | PropertyName, questionToken: Node, type: TypeNode, initializer: Expression, location?: TextRange): PropertyDeclaration;
-    function updateProperty(node: PropertyDeclaration, decorators: Decorator[], modifiers: Modifier[], name: PropertyName, type: TypeNode, initializer: Expression): PropertyDeclaration;
-    function createMethod(decorators: Decorator[], modifiers: Modifier[], asteriskToken: Node, name: string | PropertyName, typeParameters: TypeParameterDeclaration[], parameters: ParameterDeclaration[], type: TypeNode, body: Block, location?: TextRange, flags?: NodeFlags): MethodDeclaration;
-    function updateMethod(node: MethodDeclaration, decorators: Decorator[], modifiers: Modifier[], name: PropertyName, typeParameters: TypeParameterDeclaration[], parameters: ParameterDeclaration[], type: TypeNode, body: Block): MethodDeclaration;
-    function createConstructor(decorators: Decorator[], modifiers: Modifier[], parameters: ParameterDeclaration[], body: Block, location?: TextRange, flags?: NodeFlags): ConstructorDeclaration;
-    function updateConstructor(node: ConstructorDeclaration, decorators: Decorator[], modifiers: Modifier[], parameters: ParameterDeclaration[], body: Block): ConstructorDeclaration;
-    function createGetAccessor(decorators: Decorator[], modifiers: Modifier[], name: string | PropertyName, parameters: ParameterDeclaration[], type: TypeNode, body: Block, location?: TextRange, flags?: NodeFlags): GetAccessorDeclaration;
-    function updateGetAccessor(node: GetAccessorDeclaration, decorators: Decorator[], modifiers: Modifier[], name: PropertyName, parameters: ParameterDeclaration[], type: TypeNode, body: Block): GetAccessorDeclaration;
-    function createSetAccessor(decorators: Decorator[], modifiers: Modifier[], name: string | PropertyName, parameters: ParameterDeclaration[], body: Block, location?: TextRange, flags?: NodeFlags): SetAccessorDeclaration;
-    function updateSetAccessor(node: SetAccessorDeclaration, decorators: Decorator[], modifiers: Modifier[], name: PropertyName, parameters: ParameterDeclaration[], body: Block): SetAccessorDeclaration;
-    function createObjectBindingPattern(elements: BindingElement[], location?: TextRange): ObjectBindingPattern;
-    function updateObjectBindingPattern(node: ObjectBindingPattern, elements: BindingElement[]): ObjectBindingPattern;
-    function createArrayBindingPattern(elements: ArrayBindingElement[], location?: TextRange): ArrayBindingPattern;
-    function updateArrayBindingPattern(node: ArrayBindingPattern, elements: ArrayBindingElement[]): ArrayBindingPattern;
-    function createBindingElement(propertyName: string | PropertyName, dotDotDotToken: Node, name: string | BindingName, initializer?: Expression, location?: TextRange): BindingElement;
-    function updateBindingElement(node: BindingElement, propertyName: PropertyName, name: BindingName, initializer: Expression): BindingElement;
-    function createArrayLiteral(elements?: Expression[], location?: TextRange, multiLine?: boolean): ArrayLiteralExpression;
-    function updateArrayLiteral(node: ArrayLiteralExpression, elements: Expression[]): ArrayLiteralExpression;
-    function createObjectLiteral(properties?: ObjectLiteralElementLike[], location?: TextRange, multiLine?: boolean): ObjectLiteralExpression;
-    function updateObjectLiteral(node: ObjectLiteralExpression, properties: ObjectLiteralElementLike[]): ObjectLiteralExpression;
-    function createPropertyAccess(expression: Expression, name: string | Identifier, location?: TextRange, flags?: NodeFlags): PropertyAccessExpression;
-    function updatePropertyAccess(node: PropertyAccessExpression, expression: Expression, name: Identifier): PropertyAccessExpression;
-    function createElementAccess(expression: Expression, index: number | Expression, location?: TextRange): ElementAccessExpression;
-    function updateElementAccess(node: ElementAccessExpression, expression: Expression, argumentExpression: Expression): ElementAccessExpression;
-    function createCall(expression: Expression, typeArguments: TypeNode[], argumentsArray: Expression[], location?: TextRange, flags?: NodeFlags): CallExpression;
-    function updateCall(node: CallExpression, expression: Expression, typeArguments: TypeNode[], argumentsArray: Expression[]): CallExpression;
-    function createNew(expression: Expression, typeArguments: TypeNode[], argumentsArray: Expression[], location?: TextRange, flags?: NodeFlags): NewExpression;
-    function updateNew(node: NewExpression, expression: Expression, typeArguments: TypeNode[], argumentsArray: Expression[]): NewExpression;
-    function createTaggedTemplate(tag: Expression, template: Template, location?: TextRange): TaggedTemplateExpression;
-    function updateTaggedTemplate(node: TaggedTemplateExpression, tag: Expression, template: Template): TaggedTemplateExpression;
-    function createParen(expression: Expression, location?: TextRange): ParenthesizedExpression;
-    function updateParen(node: ParenthesizedExpression, expression: Expression): ParenthesizedExpression;
-    function createFunctionExpression(asteriskToken: Node, name: string | Identifier, typeParameters: TypeParameterDeclaration[], parameters: ParameterDeclaration[], type: TypeNode, body: Block, location?: TextRange, flags?: NodeFlags): FunctionExpression;
-    function updateFunctionExpression(node: FunctionExpression, name: Identifier, typeParameters: TypeParameterDeclaration[], parameters: ParameterDeclaration[], type: TypeNode, body: Block): FunctionExpression;
-    function createArrowFunction(modifiers: Modifier[], typeParameters: TypeParameterDeclaration[], parameters: ParameterDeclaration[], type: TypeNode, equalsGreaterThanToken: Node, body: ConciseBody, location?: TextRange, flags?: NodeFlags): ArrowFunction;
-    function updateArrowFunction(node: ArrowFunction, modifiers: Modifier[], typeParameters: TypeParameterDeclaration[], parameters: ParameterDeclaration[], type: TypeNode, body: ConciseBody): ArrowFunction;
-    function createDelete(expression: Expression, location?: TextRange): DeleteExpression;
-    function updateDelete(node: DeleteExpression, expression: Expression): Expression;
-    function createTypeOf(expression: Expression, location?: TextRange): TypeOfExpression;
-    function updateTypeOf(node: TypeOfExpression, expression: Expression): Expression;
-    function createVoid(expression: Expression, location?: TextRange): VoidExpression;
-    function updateVoid(node: VoidExpression, expression: Expression): VoidExpression;
-    function createAwait(expression: Expression, location?: TextRange): AwaitExpression;
-    function updateAwait(node: AwaitExpression, expression: Expression): AwaitExpression;
-    function createPrefix(operator: SyntaxKind, operand: Expression, location?: TextRange): PrefixUnaryExpression;
-    function updatePrefix(node: PrefixUnaryExpression, operand: Expression): PrefixUnaryExpression;
-    function createPostfix(operand: Expression, operator: SyntaxKind, location?: TextRange): PostfixUnaryExpression;
-    function updatePostfix(node: PostfixUnaryExpression, operand: Expression): PostfixUnaryExpression;
-    function createBinary(left: Expression, operator: SyntaxKind | Node, right: Expression, location?: TextRange): BinaryExpression;
-    function updateBinary(node: BinaryExpression, left: Expression, right: Expression): BinaryExpression;
-    function createConditional(condition: Expression, questionToken: Node, whenTrue: Expression, colonToken: Node, whenFalse: Expression, location?: TextRange): ConditionalExpression;
-    function updateConditional(node: ConditionalExpression, condition: Expression, whenTrue: Expression, whenFalse: Expression): ConditionalExpression;
-    function createTemplateExpression(head: TemplateLiteralFragment, templateSpans: TemplateSpan[], location?: TextRange): TemplateExpression;
-    function updateTemplateExpression(node: TemplateExpression, head: TemplateLiteralFragment, templateSpans: TemplateSpan[]): TemplateExpression;
-    function createYield(asteriskToken: Node, expression: Expression, location?: TextRange): YieldExpression;
-    function updateYield(node: YieldExpression, expression: Expression): YieldExpression;
-    function createSpread(expression: Expression, location?: TextRange): SpreadElementExpression;
-    function updateSpread(node: SpreadElementExpression, expression: Expression): SpreadElementExpression;
-    function createClassExpression(modifiers: Modifier[], name: Identifier, typeParameters: TypeParameterDeclaration[], heritageClauses: HeritageClause[], members: ClassElement[], location?: TextRange): ClassExpression;
-    function updateClassExpression(node: ClassExpression, modifiers: Modifier[], name: Identifier, typeParameters: TypeParameterDeclaration[], heritageClauses: HeritageClause[], members: ClassElement[]): ClassExpression;
-    function createOmittedExpression(location?: TextRange): OmittedExpression;
-    function createExpressionWithTypeArguments(typeArguments: TypeNode[], expression: Expression, location?: TextRange): ExpressionWithTypeArguments;
-    function updateExpressionWithTypeArguments(node: ExpressionWithTypeArguments, typeArguments: TypeNode[], expression: Expression): ExpressionWithTypeArguments;
-    function createTemplateSpan(expression: Expression, literal: TemplateLiteralFragment, location?: TextRange): TemplateSpan;
-    function updateTemplateSpan(node: TemplateSpan, expression: Expression, literal: TemplateLiteralFragment): TemplateSpan;
-    function createBlock(statements: Statement[], location?: TextRange, multiLine?: boolean, flags?: NodeFlags): Block;
-    function updateBlock(node: Block, statements: Statement[]): Block;
-    function createVariableStatement(modifiers: Modifier[], declarationList: VariableDeclarationList | VariableDeclaration[], location?: TextRange, flags?: NodeFlags): VariableStatement;
-    function updateVariableStatement(node: VariableStatement, modifiers: Modifier[], declarationList: VariableDeclarationList): VariableStatement;
-    function createVariableDeclarationList(declarations: VariableDeclaration[], location?: TextRange, flags?: NodeFlags): VariableDeclarationList;
-    function updateVariableDeclarationList(node: VariableDeclarationList, declarations: VariableDeclaration[]): VariableDeclarationList;
-    function createVariableDeclaration(name: string | BindingPattern | Identifier, type?: TypeNode, initializer?: Expression, location?: TextRange, flags?: NodeFlags): VariableDeclaration;
-    function updateVariableDeclaration(node: VariableDeclaration, name: BindingName, type: TypeNode, initializer: Expression): VariableDeclaration;
-    function createEmptyStatement(location: TextRange): EmptyStatement;
-    function createStatement(expression: Expression, location?: TextRange, flags?: NodeFlags): ExpressionStatement;
-    function updateStatement(node: ExpressionStatement, expression: Expression): ExpressionStatement;
-    function createIf(expression: Expression, thenStatement: Statement, elseStatement?: Statement, location?: TextRange): IfStatement;
-    function updateIf(node: IfStatement, expression: Expression, thenStatement: Statement, elseStatement: Statement): IfStatement;
-    function createDo(statement: Statement, expression: Expression, location?: TextRange): DoStatement;
-    function updateDo(node: DoStatement, statement: Statement, expression: Expression): DoStatement;
-    function createWhile(expression: Expression, statement: Statement, location?: TextRange): WhileStatement;
-    function updateWhile(node: WhileStatement, expression: Expression, statement: Statement): WhileStatement;
-    function createFor(initializer: ForInitializer, condition: Expression, incrementor: Expression, statement: Statement, location?: TextRange): ForStatement;
-    function updateFor(node: ForStatement, initializer: ForInitializer, condition: Expression, incrementor: Expression, statement: Statement): ForStatement;
-    function createForIn(initializer: ForInitializer, expression: Expression, statement: Statement, location?: TextRange): ForInStatement;
-    function updateForIn(node: ForInStatement, initializer: ForInitializer, expression: Expression, statement: Statement): ForInStatement;
-    function createForOf(initializer: ForInitializer, expression: Expression, statement: Statement, location?: TextRange): ForOfStatement;
-    function updateForOf(node: ForInStatement, initializer: ForInitializer, expression: Expression, statement: Statement): ForInStatement;
-    function createContinue(label?: Identifier, location?: TextRange): BreakStatement;
-    function updateContinue(node: ContinueStatement, label: Identifier): BreakStatement;
-    function createBreak(label?: Identifier, location?: TextRange): BreakStatement;
-    function updateBreak(node: BreakStatement, label: Identifier): BreakStatement;
-    function createReturn(expression?: Expression, location?: TextRange): ReturnStatement;
-    function updateReturn(node: ReturnStatement, expression: Expression): ReturnStatement;
-    function createWith(expression: Expression, statement: Statement, location?: TextRange): WithStatement;
-    function updateWith(node: WithStatement, expression: Expression, statement: Statement): WithStatement;
-    function createSwitch(expression: Expression, caseBlock: CaseBlock, location?: TextRange): SwitchStatement;
-    function updateSwitch(node: SwitchStatement, expression: Expression, caseBlock: CaseBlock): SwitchStatement;
-    function createLabel(label: string | Identifier, statement: Statement, location?: TextRange): LabeledStatement;
-    function updateLabel(node: LabeledStatement, label: Identifier, statement: Statement): LabeledStatement;
-    function createThrow(expression: Expression, location?: TextRange): ThrowStatement;
-    function updateThrow(node: ThrowStatement, expression: Expression): ThrowStatement;
-    function createTry(tryBlock: Block, catchClause: CatchClause, finallyBlock: Block, location?: TextRange): TryStatement;
-    function updateTry(node: TryStatement, tryBlock: Block, catchClause: CatchClause, finallyBlock: Block): TryStatement;
-    function createCaseBlock(clauses: CaseOrDefaultClause[], location?: TextRange): CaseBlock;
-    function updateCaseBlock(node: CaseBlock, clauses: CaseOrDefaultClause[]): CaseBlock;
-    function createFunctionDeclaration(decorators: Decorator[], modifiers: Modifier[], asteriskToken: Node, name: string | Identifier, typeParameters: TypeParameterDeclaration[], parameters: ParameterDeclaration[], type: TypeNode, body: Block, location?: TextRange, flags?: NodeFlags): FunctionDeclaration;
-    function updateFunctionDeclaration(node: FunctionDeclaration, decorators: Decorator[], modifiers: Modifier[], name: Identifier, typeParameters: TypeParameterDeclaration[], parameters: ParameterDeclaration[], type: TypeNode, body: Block): FunctionDeclaration;
-    function createClassDeclaration(decorators: Decorator[], modifiers: Modifier[], name: Identifier, typeParameters: TypeParameterDeclaration[], heritageClauses: HeritageClause[], members: ClassElement[], location?: TextRange): ClassDeclaration;
-    function updateClassDeclaration(node: ClassDeclaration, decorators: Decorator[], modifiers: Modifier[], name: Identifier, typeParameters: TypeParameterDeclaration[], heritageClauses: HeritageClause[], members: ClassElement[]): ClassDeclaration;
-    function createImportDeclaration(decorators: Decorator[], modifiers: Modifier[], importClause: ImportClause, moduleSpecifier?: Expression, location?: TextRange): ImportDeclaration;
-    function updateImportDeclaration(node: ImportDeclaration, decorators: Decorator[], modifiers: Modifier[], importClause: ImportClause, moduleSpecifier: Expression): ImportDeclaration;
-    function createImportClause(name: Identifier, namedBindings: NamedImportBindings, location?: TextRange): ImportClause;
-    function updateImportClause(node: ImportClause, name: Identifier, namedBindings: NamedImportBindings): ImportClause;
-    function createNamespaceImport(name: Identifier, location?: TextRange): NamespaceImport;
-    function updateNamespaceImport(node: NamespaceImport, name: Identifier): NamespaceImport;
-    function createNamedImports(elements: ImportSpecifier[], location?: TextRange): NamedImports;
+        Directory_0_does_not_exist_skipping_all_lookups_in_it: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Show_diagnostic_information: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Show_verbose_diagnostic_information: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Emit_a_single_file_with_source_maps_instead_of_having_a_separate_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Emit_the_source_alongside_the_sourcemaps_within_a_single_file_requires_inlineSourceMap_or_sourceMap_to_be_set: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Transpile_each_file_as_a_separate_module_similar_to_ts_transpileModule: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Print_names_of_generated_files_part_of_the_compilation: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Print_names_of_files_part_of_the_compilation: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        The_locale_used_when_displaying_messages_to_the_user_e_g_en_us: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Do_not_generate_custom_helper_functions_like_extends_in_compiled_output: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Do_not_include_the_default_library_file_lib_d_ts: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Do_not_add_triple_slash_references_or_imported_modules_to_the_list_of_compiled_files: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Deprecated_Use_skipLibCheck_instead_Skip_type_checking_of_default_library_declaration_files: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        List_of_folders_to_include_type_definitions_from: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Disable_size_limitations_on_JavaScript_projects: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        The_character_set_of_the_input_files: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Emit_a_UTF_8_Byte_Order_Mark_BOM_in_the_beginning_of_output_files: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Do_not_truncate_error_messages: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Output_directory_for_generated_declaration_files: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_series_of_entries_which_re_map_imports_to_lookup_locations_relative_to_the_baseUrl: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        List_of_root_folders_whose_combined_content_represents_the_structure_of_the_project_at_runtime: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Show_all_compiler_options: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Deprecated_Use_outFile_instead_Concatenate_and_emit_output_to_single_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Command_line_Options: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Basic_Options: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Strict_Type_Checking_Options: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Module_Resolution_Options: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Source_Map_Options: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Additional_Checks: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Experimental_Options: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Advanced_Options: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Provide_full_support_for_iterables_in_for_of_spread_and_destructuring_when_targeting_ES5_or_ES3: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Enable_all_strict_type_checking_options: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        List_of_language_service_plugins: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Scoped_package_detected_looking_in_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Reusing_resolution_of_module_0_to_file_1_from_old_program: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Reusing_module_resolutions_originating_in_0_since_resolutions_are_unchanged_from_old_program: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Disable_strict_checking_of_generic_signatures_in_function_types: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Variable_0_implicitly_has_an_1_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Parameter_0_implicitly_has_an_1_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Member_0_implicitly_has_an_1_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        new_expression_whose_target_lacks_a_construct_signature_implicitly_has_an_any_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        _0_which_lacks_return_type_annotation_implicitly_has_an_1_return_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Could_not_find_a_declaration_file_for_module_0_1_implicitly_has_an_any_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Element_implicitly_has_an_any_type_because_type_0_has_no_index_signature: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Object_literal_s_property_0_implicitly_has_an_1_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Rest_parameter_0_implicitly_has_an_any_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        _0_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_and_is_referenced_directly_or_indirectly_in_its_own_initializer: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        _0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Unreachable_code_detected: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Unused_label: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Fallthrough_case_in_switch: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Not_all_code_paths_return_a_value: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Binding_element_0_implicitly_has_an_1_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_parameter_type_annotation: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Property_0_implicitly_has_type_any_because_its_get_accessor_lacks_a_return_type_annotation: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Variable_0_implicitly_has_type_1_in_some_locations_where_its_type_cannot_be_determined: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Try_npm_install_types_Slash_0_if_it_exists_or_add_a_new_declaration_d_ts_file_containing_declare_module_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Dynamic_import_s_specifier_must_be_of_type_string_but_here_has_type_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        You_cannot_rename_this_element: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        import_can_only_be_used_in_a_ts_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        export_can_only_be_used_in_a_ts_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        type_parameter_declarations_can_only_be_used_in_a_ts_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        implements_clauses_can_only_be_used_in_a_ts_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        interface_declarations_can_only_be_used_in_a_ts_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        module_declarations_can_only_be_used_in_a_ts_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        type_aliases_can_only_be_used_in_a_ts_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        _0_can_only_be_used_in_a_ts_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        types_can_only_be_used_in_a_ts_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        type_arguments_can_only_be_used_in_a_ts_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        parameter_modifiers_can_only_be_used_in_a_ts_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        enum_declarations_can_only_be_used_in_a_ts_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        type_assertion_expressions_can_only_be_used_in_a_ts_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Only_identifiers_Slashqualified_names_with_optional_type_arguments_are_currently_supported_in_a_class_extends_clause: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        class_expressions_are_not_currently_supported: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Language_service_is_disabled: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        JSX_attributes_must_only_be_assigned_a_non_empty_expression: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        JSX_elements_cannot_have_multiple_attributes_with_the_same_name: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Expected_corresponding_JSX_closing_tag_for_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        JSX_attribute_expected: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Cannot_use_JSX_unless_the_jsx_flag_is_provided: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_constructor_cannot_contain_a_super_call_when_its_class_extends_null: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        JSX_element_0_has_no_corresponding_closing_tag: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Unknown_type_acquisition_option_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        super_must_be_called_before_accessing_a_property_of_super_in_the_constructor_of_a_derived_class: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        _0_is_not_a_valid_meta_property_for_keyword_1_Did_you_mean_2: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Meta_property_0_is_only_allowed_in_the_body_of_a_function_declaration_function_expression_or_constructor: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Circularity_detected_while_resolving_configuration_Colon_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_path_in_an_extends_option_must_be_relative_or_rooted_but_0_is_not: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        The_files_list_in_config_file_0_is_empty: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        No_inputs_were_found_in_config_file_0_Specified_include_paths_were_1_and_exclude_paths_were_2: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Add_missing_super_call: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Make_super_call_the_first_statement_in_the_constructor: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Change_extends_to_implements: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Remove_declaration_for_Colon_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Implement_interface_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Implement_inherited_abstract_class: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Add_this_to_unresolved_variable: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Adding_a_tsconfig_json_file_will_help_organize_projects_that_contain_both_TypeScript_and_JavaScript_files_Learn_more_at_https_Colon_Slash_Slashaka_ms_Slashtsconfig: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Type_0_is_not_assignable_to_type_1_Two_different_types_with_this_name_exist_but_they_are_unrelated: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Import_0_from_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Change_0_to_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Add_0_to_existing_import_declaration_from_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Declare_property_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Add_index_signature_for_property_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Disable_checking_for_this_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Ignore_this_error_message: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Initialize_property_0_in_the_constructor: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Initialize_static_property_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Change_spelling_to_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Declare_method_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Declare_static_method_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Prefix_0_with_an_underscore: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Convert_function_to_an_ES2015_class: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Convert_function_0_to_class: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Octal_literal_types_must_use_ES2015_syntax_Use_the_syntax_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Octal_literals_are_not_allowed_in_enums_members_initializer_Use_the_syntax_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Report_errors_in_js_files: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+    };
+}
+declare namespace ts {
+    interface ErrorCallback {
+        (message: DiagnosticMessage, length: number): void;
+    }
+    function tokenIsIdentifierOrKeyword(token: SyntaxKind): boolean;
+    interface Scanner {
+        getStartPos(): number;
+        getToken(): SyntaxKind;
+        getTextPos(): number;
+        getTokenPos(): number;
+        getTokenText(): string;
+        getTokenValue(): string;
+        hasExtendedUnicodeEscape(): boolean;
+        hasPrecedingLineBreak(): boolean;
+        isIdentifier(): boolean;
+        isReservedWord(): boolean;
+        isUnterminated(): boolean;
+        getNumericLiteralFlags(): NumericLiteralFlags;
+        reScanGreaterToken(): SyntaxKind;
+        reScanSlashToken(): SyntaxKind;
+        reScanTemplateToken(): SyntaxKind;
+        scanJsxIdentifier(): SyntaxKind;
+        scanJsxAttributeValue(): SyntaxKind;
+        reScanJsxToken(): SyntaxKind;
+        scanJsxToken(): SyntaxKind;
+        scanJSDocToken(): SyntaxKind;
+        scan(): SyntaxKind;
+        getText(): string;
+        setText(text: string, start?: number, length?: number): void;
+        setOnError(onError: ErrorCallback): void;
+        setScriptTarget(scriptTarget: ScriptTarget): void;
+        setLanguageVariant(variant: LanguageVariant): void;
+        setTextPos(textPos: number): void;
+        lookAhead<T>(callback: () => T): T;
+        scanRange<T>(start: number, length: number, callback: () => T): T;
+        tryScan<T>(callback: () => T): T;
+    }
+    function isUnicodeIdentifierStart(code: number, languageVersion: ScriptTarget): boolean;
+    function tokenToString(t: SyntaxKind): string | undefined;
+    function stringToToken(s: string): SyntaxKind;
+    function computeLineStarts(text: string): number[];
+    function getPositionOfLineAndCharacter(sourceFile: SourceFile, line: number, character: number): number;
+    function computePositionOfLineAndCharacter(lineStarts: number[], line: number, character: number): number;
+    function getLineStarts(sourceFile: SourceFileLike): number[];
+    /**
+     * We assume the first line starts at position 0 and 'position' is non-negative.
+     */
+    function computeLineAndCharacterOfPosition(lineStarts: number[], position: number): {
+        line: number;
+        character: number;
+    };
+    function getLineAndCharacterOfPosition(sourceFile: SourceFileLike, position: number): LineAndCharacter;
+    function isWhiteSpaceLike(ch: number): boolean;
+    /** Does not include line breaks. For that, see isWhiteSpaceLike. */
+    function isWhiteSpaceSingleLine(ch: number): boolean;
+    function isLineBreak(ch: number): boolean;
+    function isOctalDigit(ch: number): boolean;
+    function couldStartTrivia(text: string, pos: number): boolean;
+    function skipTrivia(text: string, pos: number, stopAfterLineBreak?: boolean, stopAtComments?: boolean): number;
+    function forEachLeadingCommentRange<T, U>(text: string, pos: number, cb: (pos: number, end: number, kind: CommentKind, hasTrailingNewLine: boolean, state: T) => U, state?: T): U | undefined;
+    function forEachTrailingCommentRange<T, U>(text: string, pos: number, cb: (pos: number, end: number, kind: CommentKind, hasTrailingNewLine: boolean, state: T) => U, state?: T): U | undefined;
+    function reduceEachLeadingCommentRange<T, U>(text: string, pos: number, cb: (pos: number, end: number, kind: CommentKind, hasTrailingNewLine: boolean, state: T, memo: U) => U, state: T, initial: U): U;
+    function reduceEachTrailingCommentRange<T, U>(text: string, pos: number, cb: (pos: number, end: number, kind: CommentKind, hasTrailingNewLine: boolean, state: T, memo: U) => U, state: T, initial: U): U;
+    function getLeadingCommentRanges(text: string, pos: number): CommentRange[] | undefined;
+    function getTrailingCommentRanges(text: string, pos: number): CommentRange[] | undefined;
+    /** Optionally, get the shebang */
+    function getShebang(text: string): string | undefined;
+    function isIdentifierStart(ch: number, languageVersion: ScriptTarget): boolean;
+    function isIdentifierPart(ch: number, languageVersion: ScriptTarget): boolean;
+    function isIdentifierText(name: string, languageVersion: ScriptTarget): boolean;
+    function createScanner(languageVersion: ScriptTarget, skipTrivia: boolean, languageVariant?: LanguageVariant, text?: string, onError?: ErrorCallback, start?: number, length?: number): Scanner;
+}
+declare namespace ts {
+    function createNode(kind: SyntaxKind, pos?: number, end?: number): Node;
+    /**
+     * Invokes a callback for each child of the given node. The 'cbNode' callback is invoked for all child nodes
+     * stored in properties. If a 'cbNodes' callback is specified, it is invoked for embedded arrays; otherwise,
+     * embedded arrays are flattened and the 'cbNode' callback is invoked for each element. If a callback returns
+     * a truthy value, iteration stops and that value is returned. Otherwise, undefined is returned.
+     *
+     * @param node a given node to visit its children
+     * @param cbNode a callback to be invoked for all child nodes
+     * @param cbNodeArray a callback to be invoked for embedded array
+     */
+    function forEachChild<T>(node: Node, cbNode: (node: Node) => T | undefined, cbNodeArray?: (nodes: NodeArray<Node>) => T | undefined): T | undefined;
+    function createSourceFile(fileName: string, sourceText: string, languageVersion: ScriptTarget, setParentNodes?: boolean, scriptKind?: ScriptKind): SourceFile;
+    function parseIsolatedEntityName(text: string, languageVersion: ScriptTarget): EntityName;
+    /**
+     * Parse json text into SyntaxTree and return node and parse errors if any
+     * @param fileName
+     * @param sourceText
+     */
+    function parseJsonText(fileName: string, sourceText: string): JsonSourceFile;
+    function isExternalModule(file: SourceFile): boolean;
+    function updateSourceFile(sourceFile: SourceFile, newText: string, textChangeRange: TextChangeRange, aggressiveChecks?: boolean): SourceFile;
+    function parseIsolatedJSDocComment(content: string, start?: number, length?: number): {
+        jsDoc: JSDoc;
+        diagnostics: Diagnostic[];
+    };
+    function parseJSDocTypeExpressionForTests(content: string, start?: number, length?: number): {
+        jsDocTypeExpression: JSDocTypeExpression;
+        diagnostics: Diagnostic[];
+    };
+}
+declare namespace ts {
+    enum ModuleInstanceState {
+        NonInstantiated = 0,
+        Instantiated = 1,
+        ConstEnumOnly = 2,
+    }
+    function getModuleInstanceState(node: Node): ModuleInstanceState;
+    function bindSourceFile(file: SourceFile, options: CompilerOptions): void;
+    /**
+     * Computes the transform flags for a node, given the transform flags of its subtree
+     *
+     * @param node The node to analyze
+     * @param subtreeFlags Transform flags computed for this node's subtree
+     */
+    function computeTransformFlagsForNode(node: Node, subtreeFlags: TransformFlags): TransformFlags;
+    /**
+     * Gets the transform flags to exclude when unioning the transform flags of a subtree.
+     *
+     * NOTE: This needs to be kept up-to-date with the exclusions used in `computeTransformFlagsForNode`.
+     *       For performance reasons, `computeTransformFlagsForNode` uses local constant values rather
+     *       than calling this function.
+     */
+    function getTransformFlagsSubtreeExclusions(kind: SyntaxKind): TransformFlags;
+}
+declare namespace ts {
+    function trace(host: ModuleResolutionHost, message: DiagnosticMessage, ...args: any[]): void;
+    function isTraceEnabled(compilerOptions: CompilerOptions, host: ModuleResolutionHost): boolean;
+    /** Array that is only intended to be pushed to, never read. */
+    interface Push<T> {
+        push(value: T): void;
+    }
+    function moduleHasNonRelativeName(moduleName: string): boolean;
+    function getEffectiveTypeRoots(options: CompilerOptions, host: {
+        directoryExists?: (directoryName: string) => boolean;
+        getCurrentDirectory?: () => string;
+    }): string[] | undefined;
+    /**
+     * @param {string | undefined} containingFile - file that contains type reference directive, can be undefined if containing file is unknown.
+     * This is possible in case if resolution is performed for directives specified via 'types' parameter. In this case initial path for secondary lookups
+     * is assumed to be the same as root directory of the project.
+     */
+    function resolveTypeReferenceDirective(typeReferenceDirectiveName: string, containingFile: string | undefined, options: CompilerOptions, host: ModuleResolutionHost): ResolvedTypeReferenceDirectiveWithFailedLookupLocations;
+    /**
+     * Given a set of options, returns the set of type directive names
+     *   that should be included for this program automatically.
+     * This list could either come from the config file,
+     *   or from enumerating the types root + initial secondary types lookup location.
+     * More type directives might appear in the program later as a result of loading actual source files;
+     *   this list is only the set of defaults that are implicitly included.
+     */
+    function getAutomaticTypeDirectiveNames(options: CompilerOptions, host: ModuleResolutionHost): string[];
+    /**
+     * Cached module resolutions per containing directory.
+     * This assumes that any module id will have the same resolution for sibling files located in the same folder.
+     */
+    interface ModuleResolutionCache extends NonRelativeModuleNameResolutionCache {
+        getOrCreateCacheForDirectory(directoryName: string): Map<ResolvedModuleWithFailedLookupLocations>;
+    }
+    /**
+     * Stored map from non-relative module name to a table: directory -> result of module lookup in this directory
+     * We support only non-relative module names because resolution of relative module names is usually more deterministic and thus less expensive.
+     */
+    interface NonRelativeModuleNameResolutionCache {
+        getOrCreateCacheForModuleName(nonRelativeModuleName: string): PerModuleNameCache;
+    }
+    interface PerModuleNameCache {
+        get(directory: string): ResolvedModuleWithFailedLookupLocations;
+        set(directory: string, result: ResolvedModuleWithFailedLookupLocations): void;
+    }
+    function createModuleResolutionCache(currentDirectory: string, getCanonicalFileName: (s: string) => string): ModuleResolutionCache;
+    function resolveModuleName(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost, cache?: ModuleResolutionCache): ResolvedModuleWithFailedLookupLocations;
+    function nodeModuleNameResolver(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost, cache?: ModuleResolutionCache): ResolvedModuleWithFailedLookupLocations;
+    /**
+     * Expose resolution logic to allow us to use Node module resolution logic from arbitrary locations.
+     * No way to do this with `require()`: https://github.com/nodejs/node/issues/5963
+     * Throws an error if the module can't be resolved.
+     */
+    function resolveJavaScriptModule(moduleName: string, initialDir: string, host: ModuleResolutionHost): string;
+    function directoryProbablyExists(directoryName: string, host: {
+        directoryExists?: (directoryName: string) => boolean;
+    }): boolean;
+    function getPackageNameFromAtTypesDirectory(mangledName: string): string;
+    function classicNameResolver(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost, cache?: NonRelativeModuleNameResolutionCache): ResolvedModuleWithFailedLookupLocations;
+    /**
+     * LSHost may load a module from a global cache of typings.
+     * This is the minumum code needed to expose that functionality; the rest is in LSHost.
+     */
+    function loadModuleFromGlobalCache(moduleName: string, projectName: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost, globalCache: string): ResolvedModuleWithFailedLookupLocations;
+}
+declare namespace ts {
+    function getNodeId(node: Node): number;
+    function getSymbolId(symbol: Symbol): number;
+    function isInstantiatedModule(node: ModuleDeclaration, preserveConstEnums: boolean): boolean;
+    function createTypeChecker(host: TypeCheckerHost, produceDiagnostics: boolean): TypeChecker;
+}
+declare namespace ts {
+    const compileOnSaveCommandLineOption: CommandLineOption;
+    const optionDeclarations: CommandLineOption[];
+    const typeAcquisitionDeclarations: CommandLineOption[];
+    interface OptionNameMap {
+        optionNameMap: Map<CommandLineOption>;
+        shortOptionNames: Map<string>;
+    }
+    const defaultInitCompilerOptions: CompilerOptions;
+    function convertEnableAutoDiscoveryToEnable(typeAcquisition: TypeAcquisition): TypeAcquisition;
+    function createCompilerDiagnosticForInvalidCustomType(opt: CommandLineOptionOfCustomType): Diagnostic;
+    function parseCustomTypeOption(opt: CommandLineOptionOfCustomType, value: string, errors: Diagnostic[]): string | number;
+    function parseListTypeOption(opt: CommandLineOptionOfListType, value: string, errors: Diagnostic[]): (string | number)[] | undefined;
+    function parseCommandLine(commandLine: string[], readFile?: (path: string) => string): ParsedCommandLine;
+    /**
+     * Read tsconfig.json file
+     * @param fileName The path to the config file
+     */
+    function readConfigFile(fileName: string, readFile: (path: string) => string): {
+        config?: any;
+        error?: Diagnostic;
+    };
+    /**
+     * Parse the text of the tsconfig.json file
+     * @param fileName The path to the config file
+     * @param jsonText The text of the config file
+     */
+    function parseConfigFileTextToJson(fileName: string, jsonText: string): {
+        config?: any;
+        error?: Diagnostic;
+    };
+    /**
+     * Read tsconfig.json file
+     * @param fileName The path to the config file
+     */
+    function readJsonConfigFile(fileName: string, readFile: (path: string) => string): JsonSourceFile;
+    /**
+     * Convert the json syntax tree into the json value
+     */
+    function convertToObject(sourceFile: JsonSourceFile, errors: Diagnostic[]): any;
+    /**
+     * Generate tsconfig configuration when running command line "--init"
+     * @param options commandlineOptions to be generated into tsconfig.json
+     * @param fileNames array of filenames to be generated into tsconfig.json
+     */
+    function generateTSConfig(options: CompilerOptions, fileNames: string[], newLine: string): string;
+    /**
+     * Parse the contents of a config file (tsconfig.json).
+     * @param json The contents of the config file to parse
+     * @param host Instance of ParseConfigHost used to enumerate files in folder.
+     * @param basePath A root directory to resolve relative path entries in the config
+     *    file to. e.g. outDir
+     */
+    function parseJsonConfigFileContent(json: any, host: ParseConfigHost, basePath: string, existingOptions?: CompilerOptions, configFileName?: string, resolutionStack?: Path[], extraFileExtensions?: JsFileExtensionInfo[]): ParsedCommandLine;
+    /**
+     * Parse the contents of a config file (tsconfig.json).
+     * @param jsonNode The contents of the config file to parse
+     * @param host Instance of ParseConfigHost used to enumerate files in folder.
+     * @param basePath A root directory to resolve relative path entries in the config
+     *    file to. e.g. outDir
+     */
+    function parseJsonSourceFileConfigFileContent(sourceFile: JsonSourceFile, host: ParseConfigHost, basePath: string, existingOptions?: CompilerOptions, configFileName?: string, resolutionStack?: Path[], extraFileExtensions?: JsFileExtensionInfo[]): ParsedCommandLine;
+    function setConfigFileInOptions(options: CompilerOptions, configFile: JsonSourceFile): void;
+    function convertCompilerOptionsFromJson(jsonOptions: any, basePath: string, configFileName?: string): {
+        options: CompilerOptions;
+        errors: Diagnostic[];
+    };
+    function convertTypeAcquisitionFromJson(jsonOptions: any, basePath: string, configFileName?: string): {
+        options: TypeAcquisition;
+        errors: Diagnostic[];
+    };
+    /**
+     * Produces a cleaned version of compiler options with personally identifiying info (aka, paths) removed.
+     * Also converts enum values back to strings.
+     */
+    function convertCompilerOptionsForTelemetry(opts: ts.CompilerOptions): ts.CompilerOptions;
+}
+declare namespace ts {
+    function getDeclarationDiagnostics(host: EmitHost, resolver: EmitResolver, targetSourceFile: SourceFile): Diagnostic[];
+    function writeDeclarationFile(declarationFilePath: string, sourceFileOrBundle: SourceFile | Bundle, host: EmitHost, resolver: EmitResolver, emitterDiagnostics: DiagnosticCollection, emitOnlyDtsFiles: boolean): boolean;
+}
+declare namespace ts {
+    function updateNode<T extends Node>(updated: T, original: T): T;
+    /**
+     * Make `elements` into a `NodeArray<T>`. If `elements` is `undefined`, returns an empty `NodeArray<T>`.
+     */
+    function createNodeArray<T extends Node>(elements?: T[], hasTrailingComma?: boolean): NodeArray<T>;
+    /**
+     * Creates a shallow, memberwise clone of a node with no source map location.
+     */
+    function getSynthesizedClone<T extends Node>(node: T | undefined): T;
+    function createLiteral(value: string): StringLiteral;
+    function createLiteral(value: number): NumericLiteral;
+    function createLiteral(value: boolean): BooleanLiteral;
+    /** Create a string literal whose source text is read from a source node during emit. */
+    function createLiteral(sourceNode: StringLiteral | NumericLiteral | Identifier): StringLiteral;
+    function createLiteral(value: string | number | boolean): PrimaryExpression;
+    function createNumericLiteral(value: string): NumericLiteral;
+    function createIdentifier(text: string): Identifier;
+    function createIdentifier(text: string, typeArguments: TypeNode[]): Identifier;
+    function updateIdentifier(node: Identifier, typeArguments: NodeArray<TypeNode> | undefined): Identifier;
+    /** Create a unique temporary variable. */
+    function createTempVariable(recordTempVariable: ((node: Identifier) => void) | undefined): Identifier;
+    /** Create a unique temporary variable for use in a loop. */
+    function createLoopVariable(): Identifier;
+    /** Create a unique name based on the supplied text. */
+    function createUniqueName(text: string): Identifier;
+    /** Create a unique name generated for a node. */
+    function getGeneratedNameForNode(node: Node): Identifier;
+    function createToken<TKind extends SyntaxKind>(token: TKind): Token<TKind>;
+    function createSuper(): SuperExpression;
+    function createThis(): ThisExpression & Token<SyntaxKind.ThisKeyword>;
+    function createNull(): NullLiteral & Token<SyntaxKind.NullKeyword>;
+    function createTrue(): BooleanLiteral & Token<SyntaxKind.TrueKeyword>;
+    function createFalse(): BooleanLiteral & Token<SyntaxKind.FalseKeyword>;
+    function createQualifiedName(left: EntityName, right: string | Identifier): QualifiedName;
+    function updateQualifiedName(node: QualifiedName, left: EntityName, right: Identifier): QualifiedName;
+    function createComputedPropertyName(expression: Expression): ComputedPropertyName;
+    function updateComputedPropertyName(node: ComputedPropertyName, expression: Expression): ComputedPropertyName;
+    function createTypeParameterDeclaration(name: string | Identifier, constraint?: TypeNode, defaultType?: TypeNode): TypeParameterDeclaration;
+    function updateTypeParameterDeclaration(node: TypeParameterDeclaration, name: Identifier, constraint: TypeNode | undefined, defaultType: TypeNode | undefined): TypeParameterDeclaration;
+    function createParameter(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, dotDotDotToken: DotDotDotToken | undefined, name: string | BindingName, questionToken?: QuestionToken, type?: TypeNode, initializer?: Expression): ParameterDeclaration;
+    function updateParameter(node: ParameterDeclaration, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, dotDotDotToken: DotDotDotToken | undefined, name: string | BindingName, questionToken: QuestionToken | undefined, type: TypeNode | undefined, initializer: Expression | undefined): ParameterDeclaration;
+    function createDecorator(expression: Expression): Decorator;
+    function updateDecorator(node: Decorator, expression: Expression): Decorator;
+    function createPropertySignature(modifiers: Modifier[] | undefined, name: PropertyName | string, questionToken: QuestionToken | undefined, type: TypeNode | undefined, initializer: Expression | undefined): PropertySignature;
+    function updatePropertySignature(node: PropertySignature, modifiers: Modifier[] | undefined, name: PropertyName, questionToken: QuestionToken | undefined, type: TypeNode | undefined, initializer: Expression | undefined): PropertySignature;
+    function createProperty(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: string | PropertyName, questionToken: QuestionToken | undefined, type: TypeNode | undefined, initializer: Expression | undefined): PropertyDeclaration;
+    function updateProperty(node: PropertyDeclaration, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: PropertyName, type: TypeNode | undefined, initializer: Expression | undefined): PropertyDeclaration;
+    function createMethodSignature(typeParameters: TypeParameterDeclaration[] | undefined, parameters: ParameterDeclaration[], type: TypeNode | undefined, name: string | PropertyName, questionToken: QuestionToken | undefined): MethodSignature;
+    function updateMethodSignature(node: MethodSignature, typeParameters: NodeArray<TypeParameterDeclaration> | undefined, parameters: NodeArray<ParameterDeclaration>, type: TypeNode | undefined, name: PropertyName, questionToken: QuestionToken | undefined): MethodSignature;
+    function createMethod(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, asteriskToken: AsteriskToken | undefined, name: string | PropertyName, questionToken: QuestionToken | undefined, typeParameters: TypeParameterDeclaration[] | undefined, parameters: ParameterDeclaration[], type: TypeNode | undefined, body: Block | undefined): MethodDeclaration;
+    function updateMethod(node: MethodDeclaration, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, asteriskToken: AsteriskToken | undefined, name: PropertyName, questionToken: QuestionToken | undefined, typeParameters: TypeParameterDeclaration[] | undefined, parameters: ParameterDeclaration[], type: TypeNode | undefined, body: Block | undefined): MethodDeclaration;
+    function createConstructor(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, parameters: ParameterDeclaration[], body: Block | undefined): ConstructorDeclaration;
+    function updateConstructor(node: ConstructorDeclaration, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, parameters: ParameterDeclaration[], body: Block | undefined): ConstructorDeclaration;
+    function createGetAccessor(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: string | PropertyName, parameters: ParameterDeclaration[], type: TypeNode | undefined, body: Block | undefined): GetAccessorDeclaration;
+    function updateGetAccessor(node: GetAccessorDeclaration, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: PropertyName, parameters: ParameterDeclaration[], type: TypeNode | undefined, body: Block | undefined): GetAccessorDeclaration;
+    function createSetAccessor(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: string | PropertyName, parameters: ParameterDeclaration[], body: Block | undefined): SetAccessorDeclaration;
+    function updateSetAccessor(node: SetAccessorDeclaration, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: PropertyName, parameters: ParameterDeclaration[], body: Block | undefined): SetAccessorDeclaration;
+    function createCallSignature(typeParameters: TypeParameterDeclaration[] | undefined, parameters: ParameterDeclaration[], type: TypeNode | undefined): CallSignatureDeclaration;
+    function updateCallSignature(node: CallSignatureDeclaration, typeParameters: NodeArray<TypeParameterDeclaration> | undefined, parameters: NodeArray<ParameterDeclaration>, type: TypeNode | undefined): CallSignatureDeclaration;
+    function createConstructSignature(typeParameters: TypeParameterDeclaration[] | undefined, parameters: ParameterDeclaration[], type: TypeNode | undefined): ConstructSignatureDeclaration;
+    function updateConstructSignature(node: ConstructSignatureDeclaration, typeParameters: NodeArray<TypeParameterDeclaration> | undefined, parameters: NodeArray<ParameterDeclaration>, type: TypeNode | undefined): ConstructSignatureDeclaration;
+    function createIndexSignature(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, parameters: ParameterDeclaration[], type: TypeNode): IndexSignatureDeclaration;
+    function updateIndexSignature(node: IndexSignatureDeclaration, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, parameters: ParameterDeclaration[], type: TypeNode): IndexSignatureDeclaration;
+    function createSignatureDeclaration(kind: SyntaxKind, typeParameters: TypeParameterDeclaration[] | undefined, parameters: ParameterDeclaration[], type: TypeNode | undefined): SignatureDeclaration;
+    function createKeywordTypeNode(kind: KeywordTypeNode["kind"]): KeywordTypeNode;
+    function createTypePredicateNode(parameterName: Identifier | ThisTypeNode | string, type: TypeNode): TypePredicateNode;
+    function updateTypePredicateNode(node: TypePredicateNode, parameterName: Identifier | ThisTypeNode, type: TypeNode): TypePredicateNode;
+    function createTypeReferenceNode(typeName: string | EntityName, typeArguments: TypeNode[] | undefined): TypeReferenceNode;
+    function updateTypeReferenceNode(node: TypeReferenceNode, typeName: EntityName, typeArguments: NodeArray<TypeNode> | undefined): TypeReferenceNode;
+    function createFunctionTypeNode(typeParameters: TypeParameterDeclaration[] | undefined, parameters: ParameterDeclaration[], type: TypeNode | undefined): FunctionTypeNode;
+    function updateFunctionTypeNode(node: FunctionTypeNode, typeParameters: NodeArray<TypeParameterDeclaration> | undefined, parameters: NodeArray<ParameterDeclaration>, type: TypeNode | undefined): FunctionTypeNode;
+    function createConstructorTypeNode(typeParameters: TypeParameterDeclaration[] | undefined, parameters: ParameterDeclaration[], type: TypeNode | undefined): ConstructorTypeNode;
+    function updateConstructorTypeNode(node: ConstructorTypeNode, typeParameters: NodeArray<TypeParameterDeclaration> | undefined, parameters: NodeArray<ParameterDeclaration>, type: TypeNode | undefined): ConstructorTypeNode;
+    function createTypeQueryNode(exprName: EntityName): TypeQueryNode;
+    function updateTypeQueryNode(node: TypeQueryNode, exprName: EntityName): TypeQueryNode;
+    function createTypeLiteralNode(members: TypeElement[]): TypeLiteralNode;
+    function updateTypeLiteralNode(node: TypeLiteralNode, members: NodeArray<TypeElement>): TypeLiteralNode;
+    function createArrayTypeNode(elementType: TypeNode): ArrayTypeNode;
+    function updateArrayTypeNode(node: ArrayTypeNode, elementType: TypeNode): ArrayTypeNode;
+    function createTupleTypeNode(elementTypes: TypeNode[]): TupleTypeNode;
+    function updateTypleTypeNode(node: TupleTypeNode, elementTypes: TypeNode[]): TupleTypeNode;
+    function createUnionTypeNode(types: TypeNode[]): UnionTypeNode;
+    function updateUnionTypeNode(node: UnionTypeNode, types: NodeArray<TypeNode>): UnionTypeNode;
+    function createIntersectionTypeNode(types: TypeNode[]): IntersectionTypeNode;
+    function updateIntersectionTypeNode(node: IntersectionTypeNode, types: NodeArray<TypeNode>): IntersectionTypeNode;
+    function createUnionOrIntersectionTypeNode(kind: SyntaxKind.UnionType | SyntaxKind.IntersectionType, types: TypeNode[]): UnionOrIntersectionTypeNode;
+    function createParenthesizedType(type: TypeNode): ParenthesizedTypeNode;
+    function updateParenthesizedType(node: ParenthesizedTypeNode, type: TypeNode): ParenthesizedTypeNode;
+    function createThisTypeNode(): ThisTypeNode;
+    function createTypeOperatorNode(type: TypeNode): TypeOperatorNode;
+    function updateTypeOperatorNode(node: TypeOperatorNode, type: TypeNode): TypeOperatorNode;
+    function createIndexedAccessTypeNode(objectType: TypeNode, indexType: TypeNode): IndexedAccessTypeNode;
+    function updateIndexedAccessTypeNode(node: IndexedAccessTypeNode, objectType: TypeNode, indexType: TypeNode): IndexedAccessTypeNode;
+    function createMappedTypeNode(readonlyToken: ReadonlyToken | undefined, typeParameter: TypeParameterDeclaration, questionToken: QuestionToken | undefined, type: TypeNode | undefined): MappedTypeNode;
+    function updateMappedTypeNode(node: MappedTypeNode, readonlyToken: ReadonlyToken | undefined, typeParameter: TypeParameterDeclaration, questionToken: QuestionToken | undefined, type: TypeNode | undefined): MappedTypeNode;
+    function createLiteralTypeNode(literal: Expression): LiteralTypeNode;
+    function updateLiteralTypeNode(node: LiteralTypeNode, literal: Expression): LiteralTypeNode;
+    function createObjectBindingPattern(elements: BindingElement[]): ObjectBindingPattern;
+    function updateObjectBindingPattern(node: ObjectBindingPattern, elements: BindingElement[]): ObjectBindingPattern;
+    function createArrayBindingPattern(elements: ArrayBindingElement[]): ArrayBindingPattern;
+    function updateArrayBindingPattern(node: ArrayBindingPattern, elements: ArrayBindingElement[]): ArrayBindingPattern;
+    function createBindingElement(dotDotDotToken: DotDotDotToken | undefined, propertyName: string | PropertyName | undefined, name: string | BindingName, initializer?: Expression): BindingElement;
+    function updateBindingElement(node: BindingElement, dotDotDotToken: DotDotDotToken | undefined, propertyName: PropertyName | undefined, name: BindingName, initializer: Expression | undefined): BindingElement;
+    function createArrayLiteral(elements?: Expression[], multiLine?: boolean): ArrayLiteralExpression;
+    function updateArrayLiteral(node: ArrayLiteralExpression, elements: Expression[]): ArrayLiteralExpression;
+    function createObjectLiteral(properties?: ObjectLiteralElementLike[], multiLine?: boolean): ObjectLiteralExpression;
+    function updateObjectLiteral(node: ObjectLiteralExpression, properties: ObjectLiteralElementLike[]): ObjectLiteralExpression;
+    function createPropertyAccess(expression: Expression, name: string | Identifier): PropertyAccessExpression;
+    function updatePropertyAccess(node: PropertyAccessExpression, expression: Expression, name: Identifier): PropertyAccessExpression;
+    function createElementAccess(expression: Expression, index: number | Expression): ElementAccessExpression;
+    function updateElementAccess(node: ElementAccessExpression, expression: Expression, argumentExpression: Expression): ElementAccessExpression;
+    function createCall(expression: Expression, typeArguments: TypeNode[] | undefined, argumentsArray: Expression[]): CallExpression;
+    function updateCall(node: CallExpression, expression: Expression, typeArguments: TypeNode[] | undefined, argumentsArray: Expression[]): CallExpression;
+    function createNew(expression: Expression, typeArguments: TypeNode[] | undefined, argumentsArray: Expression[] | undefined): NewExpression;
+    function updateNew(node: NewExpression, expression: Expression, typeArguments: TypeNode[] | undefined, argumentsArray: Expression[] | undefined): NewExpression;
+    function createTaggedTemplate(tag: Expression, template: TemplateLiteral): TaggedTemplateExpression;
+    function updateTaggedTemplate(node: TaggedTemplateExpression, tag: Expression, template: TemplateLiteral): TaggedTemplateExpression;
+    function createTypeAssertion(type: TypeNode, expression: Expression): TypeAssertion;
+    function updateTypeAssertion(node: TypeAssertion, type: TypeNode, expression: Expression): TypeAssertion;
+    function createParen(expression: Expression): ParenthesizedExpression;
+    function updateParen(node: ParenthesizedExpression, expression: Expression): ParenthesizedExpression;
+    function createFunctionExpression(modifiers: Modifier[] | undefined, asteriskToken: AsteriskToken | undefined, name: string | Identifier | undefined, typeParameters: TypeParameterDeclaration[] | undefined, parameters: ParameterDeclaration[], type: TypeNode | undefined, body: Block): FunctionExpression;
+    function updateFunctionExpression(node: FunctionExpression, modifiers: Modifier[] | undefined, asteriskToken: AsteriskToken | undefined, name: Identifier | undefined, typeParameters: TypeParameterDeclaration[] | undefined, parameters: ParameterDeclaration[], type: TypeNode | undefined, body: Block): FunctionExpression;
+    function createArrowFunction(modifiers: Modifier[] | undefined, typeParameters: TypeParameterDeclaration[] | undefined, parameters: ParameterDeclaration[], type: TypeNode | undefined, equalsGreaterThanToken: EqualsGreaterThanToken | undefined, body: ConciseBody): ArrowFunction;
+    function updateArrowFunction(node: ArrowFunction, modifiers: Modifier[] | undefined, typeParameters: TypeParameterDeclaration[] | undefined, parameters: ParameterDeclaration[], type: TypeNode | undefined, body: ConciseBody): ArrowFunction;
+    function createDelete(expression: Expression): DeleteExpression;
+    function updateDelete(node: DeleteExpression, expression: Expression): DeleteExpression;
+    function createTypeOf(expression: Expression): TypeOfExpression;
+    function updateTypeOf(node: TypeOfExpression, expression: Expression): TypeOfExpression;
+    function createVoid(expression: Expression): VoidExpression;
+    function updateVoid(node: VoidExpression, expression: Expression): VoidExpression;
+    function createAwait(expression: Expression): AwaitExpression;
+    function updateAwait(node: AwaitExpression, expression: Expression): AwaitExpression;
+    function createPrefix(operator: PrefixUnaryOperator, operand: Expression): PrefixUnaryExpression;
+    function updatePrefix(node: PrefixUnaryExpression, operand: Expression): PrefixUnaryExpression;
+    function createPostfix(operand: Expression, operator: PostfixUnaryOperator): PostfixUnaryExpression;
+    function updatePostfix(node: PostfixUnaryExpression, operand: Expression): PostfixUnaryExpression;
+    function createBinary(left: Expression, operator: BinaryOperator | BinaryOperatorToken, right: Expression): BinaryExpression;
+    function updateBinary(node: BinaryExpression, left: Expression, right: Expression, operator?: BinaryOperator | BinaryOperatorToken): BinaryExpression;
+    function createConditional(condition: Expression, whenTrue: Expression, whenFalse: Expression): ConditionalExpression;
+    function createConditional(condition: Expression, questionToken: QuestionToken, whenTrue: Expression, colonToken: ColonToken, whenFalse: Expression): ConditionalExpression;
+    function updateConditional(node: ConditionalExpression, condition: Expression, whenTrue: Expression, whenFalse: Expression): ConditionalExpression;
+    function createTemplateExpression(head: TemplateHead, templateSpans: TemplateSpan[]): TemplateExpression;
+    function updateTemplateExpression(node: TemplateExpression, head: TemplateHead, templateSpans: TemplateSpan[]): TemplateExpression;
+    function createYield(expression?: Expression): YieldExpression;
+    function createYield(asteriskToken: AsteriskToken, expression: Expression): YieldExpression;
+    function updateYield(node: YieldExpression, asteriskToken: AsteriskToken | undefined, expression: Expression): YieldExpression;
+    function createSpread(expression: Expression): SpreadElement;
+    function updateSpread(node: SpreadElement, expression: Expression): SpreadElement;
+    function createClassExpression(modifiers: Modifier[] | undefined, name: string | Identifier | undefined, typeParameters: TypeParameterDeclaration[] | undefined, heritageClauses: HeritageClause[], members: ClassElement[]): ClassExpression;
+    function updateClassExpression(node: ClassExpression, modifiers: Modifier[] | undefined, name: Identifier | undefined, typeParameters: TypeParameterDeclaration[] | undefined, heritageClauses: HeritageClause[], members: ClassElement[]): ClassExpression;
+    function createOmittedExpression(): OmittedExpression;
+    function createExpressionWithTypeArguments(typeArguments: TypeNode[], expression: Expression): ExpressionWithTypeArguments;
+    function updateExpressionWithTypeArguments(node: ExpressionWithTypeArguments, typeArguments: TypeNode[], expression: Expression): ExpressionWithTypeArguments;
+    function createAsExpression(expression: Expression, type: TypeNode): AsExpression;
+    function updateAsExpression(node: AsExpression, expression: Expression, type: TypeNode): AsExpression;
+    function createNonNullExpression(expression: Expression): NonNullExpression;
+    function updateNonNullExpression(node: NonNullExpression, expression: Expression): NonNullExpression;
+    function createMetaProperty(keywordToken: MetaProperty["keywordToken"], name: Identifier): MetaProperty;
+    function updateMetaProperty(node: MetaProperty, name: Identifier): MetaProperty;
+    function createTemplateSpan(expression: Expression, literal: TemplateMiddle | TemplateTail): TemplateSpan;
+    function updateTemplateSpan(node: TemplateSpan, expression: Expression, literal: TemplateMiddle | TemplateTail): TemplateSpan;
+    function createSemicolonClassElement(): SemicolonClassElement;
+    function createBlock(statements: Statement[], multiLine?: boolean): Block;
+    function updateBlock(node: Block, statements: Statement[]): Block;
+    function createVariableStatement(modifiers: Modifier[] | undefined, declarationList: VariableDeclarationList | VariableDeclaration[]): VariableStatement;
+    function updateVariableStatement(node: VariableStatement, modifiers: Modifier[] | undefined, declarationList: VariableDeclarationList): VariableStatement;
+    function createEmptyStatement(): EmptyStatement;
+    function createStatement(expression: Expression): ExpressionStatement;
+    function updateStatement(node: ExpressionStatement, expression: Expression): ExpressionStatement;
+    function createIf(expression: Expression, thenStatement: Statement, elseStatement?: Statement): IfStatement;
+    function updateIf(node: IfStatement, expression: Expression, thenStatement: Statement, elseStatement: Statement | undefined): IfStatement;
+    function createDo(statement: Statement, expression: Expression): DoStatement;
+    function updateDo(node: DoStatement, statement: Statement, expression: Expression): DoStatement;
+    function createWhile(expression: Expression, statement: Statement): WhileStatement;
+    function updateWhile(node: WhileStatement, expression: Expression, statement: Statement): WhileStatement;
+    function createFor(initializer: ForInitializer | undefined, condition: Expression | undefined, incrementor: Expression | undefined, statement: Statement): ForStatement;
+    function updateFor(node: ForStatement, initializer: ForInitializer | undefined, condition: Expression | undefined, incrementor: Expression | undefined, statement: Statement): ForStatement;
+    function createForIn(initializer: ForInitializer, expression: Expression, statement: Statement): ForInStatement;
+    function updateForIn(node: ForInStatement, initializer: ForInitializer, expression: Expression, statement: Statement): ForInStatement;
+    function createForOf(awaitModifier: AwaitKeywordToken, initializer: ForInitializer, expression: Expression, statement: Statement): ForOfStatement;
+    function updateForOf(node: ForOfStatement, awaitModifier: AwaitKeywordToken, initializer: ForInitializer, expression: Expression, statement: Statement): ForOfStatement;
+    function createContinue(label?: string | Identifier): ContinueStatement;
+    function updateContinue(node: ContinueStatement, label: Identifier | undefined): ContinueStatement;
+    function createBreak(label?: string | Identifier): BreakStatement;
+    function updateBreak(node: BreakStatement, label: Identifier | undefined): BreakStatement;
+    function createReturn(expression?: Expression): ReturnStatement;
+    function updateReturn(node: ReturnStatement, expression: Expression | undefined): ReturnStatement;
+    function createWith(expression: Expression, statement: Statement): WithStatement;
+    function updateWith(node: WithStatement, expression: Expression, statement: Statement): WithStatement;
+    function createSwitch(expression: Expression, caseBlock: CaseBlock): SwitchStatement;
+    function updateSwitch(node: SwitchStatement, expression: Expression, caseBlock: CaseBlock): SwitchStatement;
+    function createLabel(label: string | Identifier, statement: Statement): LabeledStatement;
+    function updateLabel(node: LabeledStatement, label: Identifier, statement: Statement): LabeledStatement;
+    function createThrow(expression: Expression): ThrowStatement;
+    function updateThrow(node: ThrowStatement, expression: Expression): ThrowStatement;
+    function createTry(tryBlock: Block, catchClause: CatchClause | undefined, finallyBlock: Block | undefined): TryStatement;
+    function updateTry(node: TryStatement, tryBlock: Block, catchClause: CatchClause | undefined, finallyBlock: Block | undefined): TryStatement;
+    function createDebuggerStatement(): DebuggerStatement;
+    function createVariableDeclaration(name: string | BindingName, type?: TypeNode, initializer?: Expression): VariableDeclaration;
+    function updateVariableDeclaration(node: VariableDeclaration, name: BindingName, type: TypeNode | undefined, initializer: Expression | undefined): VariableDeclaration;
+    function createVariableDeclarationList(declarations: VariableDeclaration[], flags?: NodeFlags): VariableDeclarationList;
+    function updateVariableDeclarationList(node: VariableDeclarationList, declarations: VariableDeclaration[]): VariableDeclarationList;
+    function createFunctionDeclaration(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, asteriskToken: AsteriskToken | undefined, name: string | Identifier | undefined, typeParameters: TypeParameterDeclaration[] | undefined, parameters: ParameterDeclaration[], type: TypeNode | undefined, body: Block | undefined): FunctionDeclaration;
+    function updateFunctionDeclaration(node: FunctionDeclaration, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, asteriskToken: AsteriskToken | undefined, name: Identifier | undefined, typeParameters: TypeParameterDeclaration[] | undefined, parameters: ParameterDeclaration[], type: TypeNode | undefined, body: Block | undefined): FunctionDeclaration;
+    function createClassDeclaration(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: string | Identifier | undefined, typeParameters: TypeParameterDeclaration[] | undefined, heritageClauses: HeritageClause[], members: ClassElement[]): ClassDeclaration;
+    function updateClassDeclaration(node: ClassDeclaration, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: Identifier | undefined, typeParameters: TypeParameterDeclaration[] | undefined, heritageClauses: HeritageClause[], members: ClassElement[]): ClassDeclaration;
+    function createInterfaceDeclaration(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: string | Identifier, typeParameters: TypeParameterDeclaration[] | undefined, heritageClauses: HeritageClause[] | undefined, members: TypeElement[]): InterfaceDeclaration;
+    function updateInterfaceDeclaration(node: InterfaceDeclaration, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: Identifier, typeParameters: TypeParameterDeclaration[] | undefined, heritageClauses: HeritageClause[] | undefined, members: TypeElement[]): InterfaceDeclaration;
+    function createTypeAliasDeclaration(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: string | Identifier, typeParameters: TypeParameterDeclaration[] | undefined, type: TypeNode): TypeAliasDeclaration;
+    function updateTypeAliasDeclaration(node: TypeAliasDeclaration, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: Identifier, typeParameters: TypeParameterDeclaration[] | undefined, type: TypeNode): TypeAliasDeclaration;
+    function createEnumDeclaration(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: string | Identifier, members: EnumMember[]): EnumDeclaration;
+    function updateEnumDeclaration(node: EnumDeclaration, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: Identifier, members: EnumMember[]): EnumDeclaration;
+    function createModuleDeclaration(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: ModuleName, body: ModuleBody | undefined, flags?: NodeFlags): ModuleDeclaration;
+    function updateModuleDeclaration(node: ModuleDeclaration, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: ModuleName, body: ModuleBody | undefined): ModuleDeclaration;
+    function createModuleBlock(statements: Statement[]): ModuleBlock;
+    function updateModuleBlock(node: ModuleBlock, statements: Statement[]): ModuleBlock;
+    function createCaseBlock(clauses: CaseOrDefaultClause[]): CaseBlock;
+    function updateCaseBlock(node: CaseBlock, clauses: CaseOrDefaultClause[]): CaseBlock;
+    function createNamespaceExportDeclaration(name: string | Identifier): NamespaceExportDeclaration;
+    function updateNamespaceExportDeclaration(node: NamespaceExportDeclaration, name: Identifier): NamespaceExportDeclaration;
+    function createImportEqualsDeclaration(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: string | Identifier, moduleReference: ModuleReference): ImportEqualsDeclaration;
+    function updateImportEqualsDeclaration(node: ImportEqualsDeclaration, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: Identifier, moduleReference: ModuleReference): ImportEqualsDeclaration;
+    function createImportDeclaration(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, importClause: ImportClause | undefined, moduleSpecifier?: Expression): ImportDeclaration;
+    function updateImportDeclaration(node: ImportDeclaration, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, importClause: ImportClause | undefined, moduleSpecifier: Expression | undefined): ImportDeclaration;
+    function createImportClause(name: Identifier | undefined, namedBindings: NamedImportBindings | undefined): ImportClause;
+    function updateImportClause(node: ImportClause, name: Identifier | undefined, namedBindings: NamedImportBindings | undefined): ImportClause;
+    function createNamespaceImport(name: Identifier): NamespaceImport;
+    function updateNamespaceImport(node: NamespaceImport, name: Identifier): NamespaceImport;
+    function createNamedImports(elements: ImportSpecifier[]): NamedImports;
     function updateNamedImports(node: NamedImports, elements: ImportSpecifier[]): NamedImports;
-    function createImportSpecifier(propertyName: Identifier, name: Identifier, location?: TextRange): ImportSpecifier;
-    function updateImportSpecifier(node: ImportSpecifier, propertyName: Identifier, name: Identifier): ImportSpecifier;
-    function createExportAssignment(decorators: Decorator[], modifiers: Modifier[], isExportEquals: boolean, expression: Expression, location?: TextRange): ExportAssignment;
-    function updateExportAssignment(node: ExportAssignment, decorators: Decorator[], modifiers: Modifier[], expression: Expression): ExportAssignment;
-    function createExportDeclaration(decorators: Decorator[], modifiers: Modifier[], exportClause: NamedExports, moduleSpecifier?: Expression, location?: TextRange): ExportDeclaration;
-    function updateExportDeclaration(node: ExportDeclaration, decorators: Decorator[], modifiers: Modifier[], exportClause: NamedExports, moduleSpecifier: Expression): ExportDeclaration;
-    function createNamedExports(elements: ExportSpecifier[], location?: TextRange): NamedExports;
+    function createImportSpecifier(propertyName: Identifier | undefined, name: Identifier): ImportSpecifier;
+    function updateImportSpecifier(node: ImportSpecifier, propertyName: Identifier | undefined, name: Identifier): ImportSpecifier;
+    function createExportAssignment(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, isExportEquals: boolean, expression: Expression): ExportAssignment;
+    function updateExportAssignment(node: ExportAssignment, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, expression: Expression): ExportAssignment;
+    function createExportDeclaration(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, exportClause: NamedExports | undefined, moduleSpecifier?: Expression): ExportDeclaration;
+    function updateExportDeclaration(node: ExportDeclaration, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, exportClause: NamedExports | undefined, moduleSpecifier: Expression | undefined): ExportDeclaration;
+    function createNamedExports(elements: ExportSpecifier[]): NamedExports;
     function updateNamedExports(node: NamedExports, elements: ExportSpecifier[]): NamedExports;
-    function createExportSpecifier(name: string | Identifier, propertyName?: string | Identifier, location?: TextRange): ExportSpecifier;
-    function updateExportSpecifier(node: ExportSpecifier, name: Identifier, propertyName: Identifier): ExportSpecifier;
-    function createJsxElement(openingElement: JsxOpeningElement, children: JsxChild[], closingElement: JsxClosingElement, location?: TextRange): JsxElement;
+    function createExportSpecifier(propertyName: string | Identifier | undefined, name: string | Identifier): ExportSpecifier;
+    function updateExportSpecifier(node: ExportSpecifier, propertyName: Identifier | undefined, name: Identifier): ExportSpecifier;
+    function createExternalModuleReference(expression: Expression): ExternalModuleReference;
+    function updateExternalModuleReference(node: ExternalModuleReference, expression: Expression): ExternalModuleReference;
+    function createJsxElement(openingElement: JsxOpeningElement, children: JsxChild[], closingElement: JsxClosingElement): JsxElement;
     function updateJsxElement(node: JsxElement, openingElement: JsxOpeningElement, children: JsxChild[], closingElement: JsxClosingElement): JsxElement;
-    function createJsxSelfClosingElement(tagName: JsxTagNameExpression, attributes: JsxAttributeLike[], location?: TextRange): JsxSelfClosingElement;
-    function updateJsxSelfClosingElement(node: JsxSelfClosingElement, tagName: JsxTagNameExpression, attributes: JsxAttributeLike[]): JsxSelfClosingElement;
-    function createJsxOpeningElement(tagName: JsxTagNameExpression, attributes: JsxAttributeLike[], location?: TextRange): JsxOpeningElement;
-    function updateJsxOpeningElement(node: JsxOpeningElement, tagName: JsxTagNameExpression, attributes: JsxAttributeLike[]): JsxOpeningElement;
-    function createJsxClosingElement(tagName: JsxTagNameExpression, location?: TextRange): JsxClosingElement;
+    function createJsxSelfClosingElement(tagName: JsxTagNameExpression, attributes: JsxAttributes): JsxSelfClosingElement;
+    function updateJsxSelfClosingElement(node: JsxSelfClosingElement, tagName: JsxTagNameExpression, attributes: JsxAttributes): JsxSelfClosingElement;
+    function createJsxOpeningElement(tagName: JsxTagNameExpression, attributes: JsxAttributes): JsxOpeningElement;
+    function updateJsxOpeningElement(node: JsxOpeningElement, tagName: JsxTagNameExpression, attributes: JsxAttributes): JsxOpeningElement;
+    function createJsxClosingElement(tagName: JsxTagNameExpression): JsxClosingElement;
     function updateJsxClosingElement(node: JsxClosingElement, tagName: JsxTagNameExpression): JsxClosingElement;
-    function createJsxAttribute(name: Identifier, initializer: StringLiteral | JsxExpression, location?: TextRange): JsxAttribute;
+    function createJsxAttribute(name: Identifier, initializer: StringLiteral | JsxExpression): JsxAttribute;
     function updateJsxAttribute(node: JsxAttribute, name: Identifier, initializer: StringLiteral | JsxExpression): JsxAttribute;
-    function createJsxSpreadAttribute(expression: Expression, location?: TextRange): JsxSpreadAttribute;
+    function createJsxAttributes(properties: JsxAttributeLike[]): JsxAttributes;
+    function updateJsxAttributes(node: JsxAttributes, properties: JsxAttributeLike[]): JsxAttributes;
+    function createJsxSpreadAttribute(expression: Expression): JsxSpreadAttribute;
     function updateJsxSpreadAttribute(node: JsxSpreadAttribute, expression: Expression): JsxSpreadAttribute;
-    function createJsxExpression(expression: Expression, location?: TextRange): JsxExpression;
-    function updateJsxExpression(node: JsxExpression, expression: Expression): JsxExpression;
-    function createHeritageClause(token: SyntaxKind, types: ExpressionWithTypeArguments[], location?: TextRange): HeritageClause;
-    function updateHeritageClause(node: HeritageClause, types: ExpressionWithTypeArguments[]): HeritageClause;
-    function createCaseClause(expression: Expression, statements: Statement[], location?: TextRange): CaseClause;
+    function createJsxExpression(dotDotDotToken: DotDotDotToken | undefined, expression: Expression | undefined): JsxExpression;
+    function updateJsxExpression(node: JsxExpression, expression: Expression | undefined): JsxExpression;
+    function createCaseClause(expression: Expression, statements: Statement[]): CaseClause;
     function updateCaseClause(node: CaseClause, expression: Expression, statements: Statement[]): CaseClause;
-    function createDefaultClause(statements: Statement[], location?: TextRange): DefaultClause;
+    function createDefaultClause(statements: Statement[]): DefaultClause;
     function updateDefaultClause(node: DefaultClause, statements: Statement[]): DefaultClause;
-    function createCatchClause(variableDeclaration: string | VariableDeclaration, block: Block, location?: TextRange): CatchClause;
+    function createHeritageClause(token: HeritageClause["token"], types: ExpressionWithTypeArguments[]): HeritageClause;
+    function updateHeritageClause(node: HeritageClause, types: ExpressionWithTypeArguments[]): HeritageClause;
+    function createCatchClause(variableDeclaration: string | VariableDeclaration, block: Block): CatchClause;
     function updateCatchClause(node: CatchClause, variableDeclaration: VariableDeclaration, block: Block): CatchClause;
-    function createPropertyAssignment(name: string | PropertyName, initializer: Expression, location?: TextRange): PropertyAssignment;
+    function createPropertyAssignment(name: string | PropertyName, initializer: Expression): PropertyAssignment;
     function updatePropertyAssignment(node: PropertyAssignment, name: PropertyName, initializer: Expression): PropertyAssignment;
-    function createShorthandPropertyAssignment(name: string | Identifier, objectAssignmentInitializer: Expression, location?: TextRange): ShorthandPropertyAssignment;
-    function updateShorthandPropertyAssignment(node: ShorthandPropertyAssignment, name: Identifier, objectAssignmentInitializer: Expression): ShorthandPropertyAssignment;
+    function createShorthandPropertyAssignment(name: string | Identifier, objectAssignmentInitializer?: Expression): ShorthandPropertyAssignment;
+    function updateShorthandPropertyAssignment(node: ShorthandPropertyAssignment, name: Identifier, objectAssignmentInitializer: Expression | undefined): ShorthandPropertyAssignment;
+    function createSpreadAssignment(expression: Expression): SpreadAssignment;
+    function updateSpreadAssignment(node: SpreadAssignment, expression: Expression): SpreadAssignment;
+    function createEnumMember(name: string | PropertyName, initializer?: Expression): EnumMember;
+    function updateEnumMember(node: EnumMember, name: PropertyName, initializer: Expression | undefined): EnumMember;
     function updateSourceFileNode(node: SourceFile, statements: Statement[]): SourceFile;
     /**
-     * Creates a synthetic statement to act as a placeholder for a not-emitted statement in
-     * order to preserve comments.
-     *
-     * @param original The original statement.
+     * Creates a shallow, memberwise clone of a node for mutation.
+     */
+    function getMutableClone<T extends Node>(node: T): T;
+    /**
+     * Creates a synthetic statement to act as a placeholder for a not-emitted statement in
+     * order to preserve comments.
+     *
+     * @param original The original statement.
+     */
+    function createNotEmittedStatement(original: Node): NotEmittedStatement;
+    /**
+     * Creates a synthetic element to act as a placeholder for the end of an emitted declaration in
+     * order to properly emit exports.
+     */
+    function createEndOfDeclarationMarker(original: Node): EndOfDeclarationMarker;
+    /**
+     * Creates a synthetic element to act as a placeholder for the beginning of a merged declaration in
+     * order to properly emit exports.
+     */
+    function createMergeDeclarationMarker(original: Node): MergeDeclarationMarker;
+    /**
+     * Creates a synthetic expression to act as a placeholder for a not-emitted expression in
+     * order to preserve comments or sourcemap positions.
+     *
+     * @param expression The inner expression to emit.
+     * @param original The original outer expression.
+     * @param location The location for the expression. Defaults to the positions from "original" if provided.
+     */
+    function createPartiallyEmittedExpression(expression: Expression, original?: Node): PartiallyEmittedExpression;
+    function updatePartiallyEmittedExpression(node: PartiallyEmittedExpression, expression: Expression): PartiallyEmittedExpression;
+    function createCommaList(elements: Expression[]): CommaListExpression;
+    function updateCommaList(node: CommaListExpression, elements: Expression[]): CommaListExpression;
+    function createBundle(sourceFiles: SourceFile[]): Bundle;
+    function updateBundle(node: Bundle, sourceFiles: SourceFile[]): Bundle;
+    function createImmediatelyInvokedFunctionExpression(statements: Statement[]): CallExpression;
+    function createImmediatelyInvokedFunctionExpression(statements: Statement[], param: ParameterDeclaration, paramValue: Expression): CallExpression;
+    function createComma(left: Expression, right: Expression): Expression;
+    function createLessThan(left: Expression, right: Expression): Expression;
+    function createAssignment(left: ObjectLiteralExpression | ArrayLiteralExpression, right: Expression): DestructuringAssignment;
+    function createAssignment(left: Expression, right: Expression): BinaryExpression;
+    function createStrictEquality(left: Expression, right: Expression): BinaryExpression;
+    function createStrictInequality(left: Expression, right: Expression): BinaryExpression;
+    function createAdd(left: Expression, right: Expression): BinaryExpression;
+    function createSubtract(left: Expression, right: Expression): BinaryExpression;
+    function createPostfixIncrement(operand: Expression): PostfixUnaryExpression;
+    function createLogicalAnd(left: Expression, right: Expression): BinaryExpression;
+    function createLogicalOr(left: Expression, right: Expression): BinaryExpression;
+    function createLogicalNot(operand: Expression): PrefixUnaryExpression;
+    function createVoidZero(): VoidExpression;
+    function createExportDefault(expression: Expression): ExportAssignment;
+    function createExternalModuleExport(exportName: Identifier): ExportDeclaration;
+    /**
+     * Clears any EmitNode entries from parse-tree nodes.
+     * @param sourceFile A source file.
+     */
+    function disposeEmitNodes(sourceFile: SourceFile): void;
+    /**
+     * Associates a node with the current transformation, initializing
+     * various transient transformation properties.
+     */
+    function getOrCreateEmitNode(node: Node): EmitNode;
+    function setTextRange<T extends TextRange>(range: T, location: TextRange | undefined): T;
+    /**
+     * Sets flags that control emit behavior of a node.
+     */
+    function setEmitFlags<T extends Node>(node: T, emitFlags: EmitFlags): T;
+    /**
+     * Gets a custom text range to use when emitting source maps.
+     */
+    function getSourceMapRange(node: Node): SourceMapRange;
+    /**
+     * Sets a custom text range to use when emitting source maps.
+     */
+    function setSourceMapRange<T extends Node>(node: T, range: SourceMapRange | undefined): T;
+    /**
+     * Create an external source map source file reference
+     */
+    function createSourceMapSource(fileName: string, text: string, skipTrivia?: (pos: number) => number): SourceMapSource;
+    /**
+     * Gets the TextRange to use for source maps for a token of a node.
+     */
+    function getTokenSourceMapRange(node: Node, token: SyntaxKind): SourceMapRange | undefined;
+    /**
+     * Sets the TextRange to use for source maps for a token of a node.
+     */
+    function setTokenSourceMapRange<T extends Node>(node: T, token: SyntaxKind, range: SourceMapRange | undefined): T;
+    /**
+     * Gets a custom text range to use when emitting comments.
+     */
+    function getCommentRange(node: Node): TextRange;
+    /**
+     * Sets a custom text range to use when emitting comments.
+     */
+    function setCommentRange<T extends Node>(node: T, range: TextRange): T;
+    function getSyntheticLeadingComments(node: Node): SynthesizedComment[] | undefined;
+    function setSyntheticLeadingComments<T extends Node>(node: T, comments: SynthesizedComment[]): T;
+    function addSyntheticLeadingComment<T extends Node>(node: T, kind: SyntaxKind.SingleLineCommentTrivia | SyntaxKind.MultiLineCommentTrivia, text: string, hasTrailingNewLine?: boolean): T;
+    function getSyntheticTrailingComments(node: Node): SynthesizedComment[] | undefined;
+    function setSyntheticTrailingComments<T extends Node>(node: T, comments: SynthesizedComment[]): T;
+    function addSyntheticTrailingComment<T extends Node>(node: T, kind: SyntaxKind.SingleLineCommentTrivia | SyntaxKind.MultiLineCommentTrivia, text: string, hasTrailingNewLine?: boolean): T;
+    /**
+     * Gets the constant value to emit for an expression.
      */
-    function createNotEmittedStatement(original: Node): NotEmittedStatement;
+    function getConstantValue(node: PropertyAccessExpression | ElementAccessExpression): string | number;
     /**
-     * Creates a synthetic expression to act as a placeholder for a not-emitted expression in
-     * order to preserve comments or sourcemap positions.
-     *
-     * @param expression The inner expression to emit.
-     * @param original The original outer expression.
-     * @param location The location for the expression. Defaults to the positions from "original" if provided.
+     * Sets the constant value to emit for an expression.
      */
-    function createPartiallyEmittedExpression(expression: Expression, original?: Node, location?: TextRange): PartiallyEmittedExpression;
-    function updatePartiallyEmittedExpression(node: PartiallyEmittedExpression, expression: Expression): PartiallyEmittedExpression;
-    function createComma(left: Expression, right: Expression): Expression;
-    function createLessThan(left: Expression, right: Expression, location?: TextRange): Expression;
-    function createAssignment(left: Expression, right: Expression, location?: TextRange): BinaryExpression;
-    function createStrictEquality(left: Expression, right: Expression): BinaryExpression;
-    function createStrictInequality(left: Expression, right: Expression): BinaryExpression;
-    function createAdd(left: Expression, right: Expression): BinaryExpression;
-    function createSubtract(left: Expression, right: Expression): BinaryExpression;
-    function createPostfixIncrement(operand: Expression, location?: TextRange): PostfixUnaryExpression;
-    function createLogicalAnd(left: Expression, right: Expression): BinaryExpression;
-    function createLogicalOr(left: Expression, right: Expression): BinaryExpression;
-    function createLogicalNot(operand: Expression): PrefixUnaryExpression;
-    function createVoidZero(): VoidExpression;
+    function setConstantValue(node: PropertyAccessExpression | ElementAccessExpression, value: string | number): PropertyAccessExpression | ElementAccessExpression;
+    /**
+     * Adds an EmitHelper to a node.
+     */
+    function addEmitHelper<T extends Node>(node: T, helper: EmitHelper): T;
+    /**
+     * Add EmitHelpers to a node.
+     */
+    function addEmitHelpers<T extends Node>(node: T, helpers: EmitHelper[] | undefined): T;
+    /**
+     * Removes an EmitHelper from a node.
+     */
+    function removeEmitHelper(node: Node, helper: EmitHelper): boolean;
+    /**
+     * Gets the EmitHelpers of a node.
+     */
+    function getEmitHelpers(node: Node): EmitHelper[] | undefined;
+    /**
+     * Moves matching emit helpers from a source node to a target node.
+     */
+    function moveEmitHelpers(source: Node, target: Node, predicate: (helper: EmitHelper) => boolean): void;
+    function compareEmitHelpers(x: EmitHelper, y: EmitHelper): Comparison;
+    function setOriginalNode<T extends Node>(node: T, original: Node | undefined): T;
+}
+declare namespace ts {
+    const nullTransformationContext: TransformationContext;
+    type TypeOfTag = "undefined" | "number" | "boolean" | "string" | "symbol" | "object" | "function";
+    function createTypeCheck(value: Expression, tag: TypeOfTag): BinaryExpression;
     function createMemberAccessForPropertyName(target: Expression, memberName: PropertyName, location?: TextRange): MemberExpression;
-    function createRestParameter(name: string | Identifier): ParameterDeclaration;
     function createFunctionCall(func: Expression, thisArg: Expression, argumentsList: Expression[], location?: TextRange): CallExpression;
     function createFunctionApply(func: Expression, thisArg: Expression, argumentsExpression: Expression, location?: TextRange): CallExpression;
     function createArraySlice(array: Expression, start?: number | Expression): CallExpression;
     function createArrayConcat(array: Expression, values: Expression[]): CallExpression;
     function createMathPow(left: Expression, right: Expression, location?: TextRange): CallExpression;
-    function createReactCreateElement(reactNamespace: string, tagName: Expression, props: Expression, children: Expression[], parentElement: JsxOpeningLikeElement, location: TextRange): LeftHandSideExpression;
-    function createLetDeclarationList(declarations: VariableDeclaration[], location?: TextRange): VariableDeclarationList;
-    function createConstDeclarationList(declarations: VariableDeclaration[], location?: TextRange): VariableDeclarationList;
-    function createHelperName(externalHelpersModuleName: Identifier | undefined, name: string): Identifier | PropertyAccessExpression;
-    function createExtendsHelper(externalHelpersModuleName: Identifier | undefined, name: Identifier): CallExpression;
-    function createAssignHelper(externalHelpersModuleName: Identifier | undefined, attributesSegments: Expression[]): CallExpression;
-    function createParamHelper(externalHelpersModuleName: Identifier | undefined, expression: Expression, parameterOffset: number, location?: TextRange): CallExpression;
-    function createMetadataHelper(externalHelpersModuleName: Identifier | undefined, metadataKey: string, metadataValue: Expression): CallExpression;
-    function createDecorateHelper(externalHelpersModuleName: Identifier | undefined, decoratorExpressions: Expression[], target: Expression, memberName?: Expression, descriptor?: Expression, location?: TextRange): CallExpression;
-    function createAwaiterHelper(externalHelpersModuleName: Identifier | undefined, hasLexicalArguments: boolean, promiseConstructor: EntityName | Expression, body: Block): CallExpression;
-    function createHasOwnProperty(target: LeftHandSideExpression, propertyName: Expression): CallExpression;
-    function createAdvancedAsyncSuperHelper(): VariableStatement;
-    function createSimpleAsyncSuperHelper(): VariableStatement;
+    function createExpressionForJsxElement(jsxFactoryEntity: EntityName, reactNamespace: string, tagName: Expression, props: Expression, children: Expression[], parentElement: JsxOpeningLikeElement, location: TextRange): LeftHandSideExpression;
+    function getHelperName(name: string): Identifier;
+    function createValuesHelper(context: TransformationContext, expression: Expression, location?: TextRange): CallExpression;
+    function createReadHelper(context: TransformationContext, iteratorRecord: Expression, count: number | undefined, location?: TextRange): CallExpression;
+    function createSpreadHelper(context: TransformationContext, argumentList: Expression[], location?: TextRange): CallExpression;
+    function createForOfBindingStatement(node: ForInitializer, boundValue: Expression): Statement;
+    function insertLeadingStatement(dest: Statement, source: Statement): Block;
+    function restoreEnclosingLabel(node: Statement, outermostLabeledStatement: LabeledStatement, afterRestoreLabelCallback?: (node: LabeledStatement) => void): Statement;
     interface CallBinding {
         target: LeftHandSideExpression;
         thisArg: Expression;
@@ -8347,6 +10888,84 @@ declare namespace ts {
     function createExpressionFromEntityName(node: EntityName | Expression): Expression;
     function createExpressionForPropertyName(memberName: PropertyName): Expression;
     function createExpressionForObjectLiteralElementLike(node: ObjectLiteralExpression, property: ObjectLiteralElementLike, receiver: Expression): Expression;
+    /**
+     * Gets the internal name of a declaration. This is primarily used for declarations that can be
+     * referred to by name in the body of an ES5 class function body. An internal name will *never*
+     * be prefixed with an module or namespace export modifier like "exports." when emitted as an
+     * expression. An internal name will also *never* be renamed due to a collision with a block
+     * scoped variable.
+     *
+     * @param node The declaration.
+     * @param allowComments A value indicating whether comments may be emitted for the name.
+     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
+     */
+    function getInternalName(node: Declaration, allowComments?: boolean, allowSourceMaps?: boolean): Identifier;
+    /**
+     * Gets whether an identifier should only be referred to by its internal name.
+     */
+    function isInternalName(node: Identifier): boolean;
+    /**
+     * Gets the local name of a declaration. This is primarily used for declarations that can be
+     * referred to by name in the declaration's immediate scope (classes, enums, namespaces). A
+     * local name will *never* be prefixed with an module or namespace export modifier like
+     * "exports." when emitted as an expression.
+     *
+     * @param node The declaration.
+     * @param allowComments A value indicating whether comments may be emitted for the name.
+     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
+     */
+    function getLocalName(node: Declaration, allowComments?: boolean, allowSourceMaps?: boolean): Identifier;
+    /**
+     * Gets whether an identifier should only be referred to by its local name.
+     */
+    function isLocalName(node: Identifier): boolean;
+    /**
+     * Gets the export name of a declaration. This is primarily used for declarations that can be
+     * referred to by name in the declaration's immediate scope (classes, enums, namespaces). An
+     * export name will *always* be prefixed with an module or namespace export modifier like
+     * `"exports."` when emitted as an expression if the name points to an exported symbol.
+     *
+     * @param node The declaration.
+     * @param allowComments A value indicating whether comments may be emitted for the name.
+     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
+     */
+    function getExportName(node: Declaration, allowComments?: boolean, allowSourceMaps?: boolean): Identifier;
+    /**
+     * Gets whether an identifier should only be referred to by its export representation if the
+     * name points to an exported symbol.
+     */
+    function isExportName(node: Identifier): boolean;
+    /**
+     * Gets the name of a declaration for use in declarations.
+     *
+     * @param node The declaration.
+     * @param allowComments A value indicating whether comments may be emitted for the name.
+     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
+     */
+    function getDeclarationName(node: Declaration, allowComments?: boolean, allowSourceMaps?: boolean): Identifier;
+    /**
+     * Gets the exported name of a declaration for use in expressions.
+     *
+     * An exported name will *always* be prefixed with an module or namespace export modifier like
+     * "exports." if the name points to an exported symbol.
+     *
+     * @param ns The namespace identifier.
+     * @param node The declaration.
+     * @param allowComments A value indicating whether comments may be emitted for the name.
+     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
+     */
+    function getExternalModuleOrNamespaceExportName(ns: Identifier | undefined, node: Declaration, allowComments?: boolean, allowSourceMaps?: boolean): Identifier | PropertyAccessExpression;
+    /**
+     * Gets a namespace-qualified name for use in expressions.
+     *
+     * @param ns The namespace identifier.
+     * @param name The name.
+     * @param allowComments A value indicating whether comments may be emitted for the name.
+     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
+     */
+    function getNamespaceMemberName(ns: Identifier, name: Identifier, allowComments?: boolean, allowSourceMaps?: boolean): PropertyAccessExpression;
+    function convertToFunctionBody(node: ConciseBody, multiLine?: boolean): Block;
+    function convertFunctionDeclarationToExpression(node: FunctionDeclaration): FunctionExpression;
     /**
      * Add any necessary prologue-directives into target statement-array.
      * The function needs to be called during each transformation step.
@@ -8358,7 +10977,28 @@ declare namespace ts {
      * @param ensureUseStrict: boolean determining whether the function need to add prologue-directives
      * @param visitor: Optional callback used to visit any custom prologue directives.
      */
-    function addPrologueDirectives(target: Statement[], source: Statement[], ensureUseStrict?: boolean, visitor?: (node: Node) => VisitResult<Node>): number;
+    function addPrologue(target: Statement[], source: Statement[], ensureUseStrict?: boolean, visitor?: (node: Node) => VisitResult<Node>): number;
+    /**
+     * Add just the standard (string-expression) prologue-directives into target statement-array.
+     * The function needs to be called during each transformation step.
+     * This function needs to be called whenever we transform the statement
+     * list of a source file, namespace, or function-like body.
+     */
+    function addStandardPrologue(target: Statement[], source: Statement[], ensureUseStrict?: boolean): number;
+    /**
+     * Add just the custom prologue-directives into target statement-array.
+     * The function needs to be called during each transformation step.
+     * This function needs to be called whenever we transform the statement
+     * list of a source file, namespace, or function-like body.
+     */
+    function addCustomPrologue(target: Statement[], source: Statement[], statementOffset: number, visitor?: (node: Node) => VisitResult<Node>): number;
+    function startsWithUseStrict(statements: Statement[]): boolean;
+    /**
+     * Ensures "use strict" directive is added
+     *
+     * @param statements An array of statements
+     */
+    function ensureUseStrict(statements: NodeArray<Statement>): NodeArray<Statement>;
     /**
      * Wraps the operand to a BinaryExpression in parentheses if they are needed to preserve the intended
      * order of operations.
@@ -8369,6 +11009,8 @@ declare namespace ts {
      *                           BinaryExpression.
      */
     function parenthesizeBinaryOperand(binaryOperator: SyntaxKind, operand: Expression, isLeftSideOfBinary: boolean, leftOperand?: Expression): Expression;
+    function parenthesizeForConditionalHead(condition: Expression): Expression;
+    function parenthesizeSubexpressionOfConditionalExpression(e: Expression): Expression;
     /**
      * Wraps an expression in parentheses if it is needed in order to use the expression
      * as the expression of a NewExpression node.
@@ -8385,8 +11027,12 @@ declare namespace ts {
     function parenthesizeForAccess(expression: Expression): LeftHandSideExpression;
     function parenthesizePostfixOperand(operand: Expression): LeftHandSideExpression;
     function parenthesizePrefixOperand(operand: Expression): UnaryExpression;
+    function parenthesizeListElements(elements: NodeArray<Expression>): NodeArray<Expression>;
     function parenthesizeExpressionForList(expression: Expression): Expression;
     function parenthesizeExpressionForExpressionStatement(expression: Expression): Expression;
+    function parenthesizeElementTypeMember(member: TypeNode): TypeNode;
+    function parenthesizeElementTypeMembers(members: TypeNode[]): NodeArray<TypeNode>;
+    function parenthesizeTypeParameters(typeParameters: TypeNode[]): NodeArray<TypeNode>;
     function parenthesizeConciseBody(body: ConciseBody): ConciseBody;
     enum OuterExpressionKinds {
         Parentheses = 1,
@@ -8394,84 +11040,18 @@ declare namespace ts {
         PartiallyEmittedExpressions = 4,
         All = 7,
     }
+    type OuterExpression = ParenthesizedExpression | TypeAssertion | AsExpression | NonNullExpression | PartiallyEmittedExpression;
+    function isOuterExpression(node: Node, kinds?: OuterExpressionKinds): node is OuterExpression;
     function skipOuterExpressions(node: Expression, kinds?: OuterExpressionKinds): Expression;
     function skipOuterExpressions(node: Node, kinds?: OuterExpressionKinds): Node;
     function skipParentheses(node: Expression): Expression;
     function skipParentheses(node: Node): Node;
     function skipAssertions(node: Expression): Expression;
     function skipAssertions(node: Node): Node;
-    function skipPartiallyEmittedExpressions(node: Expression): Expression;
-    function skipPartiallyEmittedExpressions(node: Node): Node;
+    function recreateOuterExpressions(outerExpression: Expression | undefined, innerExpression: Expression, kinds?: OuterExpressionKinds): Expression;
     function startOnNewLine<T extends Node>(node: T): T;
-    function setOriginalNode<T extends Node>(node: T, original: Node): T;
-    /**
-     * Clears any EmitNode entries from parse-tree nodes.
-     * @param sourceFile A source file.
-     */
-    function disposeEmitNodes(sourceFile: SourceFile): void;
-    /**
-     * Gets flags that control emit behavior of a node.
-     *
-     * @param node The node.
-     */
-    function getEmitFlags(node: Node): EmitFlags;
-    /**
-     * Sets flags that control emit behavior of a node.
-     *
-     * @param node The node.
-     * @param emitFlags The NodeEmitFlags for the node.
-     */
-    function setEmitFlags<T extends Node>(node: T, emitFlags: EmitFlags): T;
-    /**
-     * Sets a custom text range to use when emitting source maps.
-     *
-     * @param node The node.
-     * @param range The text range.
-     */
-    function setSourceMapRange<T extends Node>(node: T, range: TextRange): T;
-    /**
-     * Sets the TextRange to use for source maps for a token of a node.
-     *
-     * @param node The node.
-     * @param token The token.
-     * @param range The text range.
-     */
-    function setTokenSourceMapRange<T extends Node>(node: T, token: SyntaxKind, range: TextRange): T;
-    /**
-     * Sets a custom text range to use when emitting comments.
-     */
-    function setCommentRange<T extends Node>(node: T, range: TextRange): T;
-    /**
-     * Gets a custom text range to use when emitting comments.
-     *
-     * @param node The node.
-     */
-    function getCommentRange(node: Node): TextRange;
-    /**
-     * Gets a custom text range to use when emitting source maps.
-     *
-     * @param node The node.
-     */
-    function getSourceMapRange(node: Node): TextRange;
-    /**
-     * Gets the TextRange to use for source maps for a token of a node.
-     *
-     * @param node The node.
-     * @param token The token.
-     */
-    function getTokenSourceMapRange(node: Node, token: SyntaxKind): TextRange;
-    /**
-     * Gets the constant value to emit for an expression.
-     */
-    function getConstantValue(node: PropertyAccessExpression | ElementAccessExpression): number;
-    /**
-     * Sets the constant value to emit for an expression.
-     */
-    function setConstantValue(node: PropertyAccessExpression | ElementAccessExpression, value: number): PropertyAccessExpression | ElementAccessExpression;
-    function setTextRange<T extends TextRange>(node: T, location: TextRange): T;
-    function setNodeFlags<T extends Node>(node: T, flags: NodeFlags): T;
-    function setMultiLine<T extends ObjectLiteralExpression | ArrayLiteralExpression | Block>(node: T, multiLine: boolean): T;
-    function setHasTrailingComma<T extends Node>(nodes: NodeArray<T>, hasTrailingComma: boolean): NodeArray<T>;
+    function getExternalHelpersModuleName(node: SourceFile): Identifier;
+    function getOrCreateExternalHelpersModuleNameIfNeeded(node: SourceFile, compilerOptions: CompilerOptions, hasExportStarsToExportValues?: boolean): Identifier;
     /**
      * Get the name of that target module from an import or export declaration
      */
@@ -8493,164 +11073,62 @@ declare namespace ts {
      * Otherwise, a new StringLiteral node representing the module name will be returned.
      */
     function tryGetModuleNameFromFile(file: SourceFile, host: EmitHost, options: CompilerOptions): StringLiteral;
-}
-declare namespace ts {
-    function createNode(kind: SyntaxKind, pos?: number, end?: number): Node;
-    function forEachChild<T>(node: Node, cbNode: (node: Node) => T, cbNodeArray?: (nodes: Node[]) => T): T;
-    function createSourceFile(fileName: string, sourceText: string, languageVersion: ScriptTarget, setParentNodes?: boolean, scriptKind?: ScriptKind): SourceFile;
-    function isExternalModule(file: SourceFile): boolean;
-    function updateSourceFile(sourceFile: SourceFile, newText: string, textChangeRange: TextChangeRange, aggressiveChecks?: boolean): SourceFile;
-    function parseIsolatedJSDocComment(content: string, start?: number, length?: number): {
-        jsDoc: JSDoc;
-        diagnostics: Diagnostic[];
-    };
-    function parseJSDocTypeExpressionForTests(content: string, start?: number, length?: number): {
-        jsDocTypeExpression: JSDocTypeExpression;
-        diagnostics: Diagnostic[];
-    };
-}
-declare namespace ts {
-    enum ModuleInstanceState {
-        NonInstantiated = 0,
-        Instantiated = 1,
-        ConstEnumOnly = 2,
-    }
-    function getModuleInstanceState(node: Node): ModuleInstanceState;
-    function bindSourceFile(file: SourceFile, options: CompilerOptions): void;
     /**
-     * Computes the transform flags for a node, given the transform flags of its subtree
-     *
-     * @param node The node to analyze
-     * @param subtreeFlags Transform flags computed for this node's subtree
+     * Gets the initializer of an BindingOrAssignmentElement.
      */
-    function computeTransformFlagsForNode(node: Node, subtreeFlags: TransformFlags): TransformFlags;
-}
-declare namespace ts {
-    function trace(host: ModuleResolutionHost, message: DiagnosticMessage, ...args: any[]): void;
-    function isTraceEnabled(compilerOptions: CompilerOptions, host: ModuleResolutionHost): boolean;
-    function createResolvedModule(resolvedFileName: string, isExternalLibraryImport: boolean, failedLookupLocations: string[]): ResolvedModuleWithFailedLookupLocations;
-    interface ModuleResolutionState {
-        host: ModuleResolutionHost;
-        compilerOptions: CompilerOptions;
-        traceEnabled: boolean;
-        skipTsx: boolean;
-    }
-    function getEffectiveTypeRoots(options: CompilerOptions, host: {
-        directoryExists?: (directoryName: string) => boolean;
-        getCurrentDirectory?: () => string;
-    }): string[] | undefined;
+    function getInitializerOfBindingOrAssignmentElement(bindingElement: BindingOrAssignmentElement): Expression | undefined;
     /**
-     * @param {string | undefined} containingFile - file that contains type reference directive, can be undefined if containing file is unknown.
-     * This is possible in case if resolution is performed for directives specified via 'types' parameter. In this case initial path for secondary lookups
-     * is assumed to be the same as root directory of the project.
+     * Gets the name of an BindingOrAssignmentElement.
      */
-    function resolveTypeReferenceDirective(typeReferenceDirectiveName: string, containingFile: string, options: CompilerOptions, host: ModuleResolutionHost): ResolvedTypeReferenceDirectiveWithFailedLookupLocations;
-    /**
-      * Given a set of options, returns the set of type directive names
-      *   that should be included for this program automatically.
-      * This list could either come from the config file,
-      *   or from enumerating the types root + initial secondary types lookup location.
-      * More type directives might appear in the program later as a result of loading actual source files;
-      *   this list is only the set of defaults that are implicitly included.
-      */
-    function getAutomaticTypeDirectiveNames(options: CompilerOptions, host: ModuleResolutionHost): string[];
-    function resolveModuleName(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost): ResolvedModuleWithFailedLookupLocations;
-    function nodeModuleNameResolver(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost): ResolvedModuleWithFailedLookupLocations;
-    function directoryProbablyExists(directoryName: string, host: {
-        directoryExists?: (directoryName: string) => boolean;
-    }): boolean;
-    function loadModuleFromNodeModules(moduleName: string, directory: string, failedLookupLocations: string[], state: ModuleResolutionState, checkOneLevel: boolean): string;
-    function classicNameResolver(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost): ResolvedModuleWithFailedLookupLocations;
-}
-declare namespace ts {
-    function getNodeId(node: Node): number;
-    function getSymbolId(symbol: Symbol): number;
-    function createTypeChecker(host: TypeCheckerHost, produceDiagnostics: boolean): TypeChecker;
-}
-declare namespace ts {
-    const compileOnSaveCommandLineOption: CommandLineOption;
-    const optionDeclarations: CommandLineOption[];
-    let typingOptionDeclarations: CommandLineOption[];
-    interface OptionNameMap {
-        optionNameMap: Map<CommandLineOption>;
-        shortOptionNames: Map<string>;
-    }
-    const defaultInitCompilerOptions: CompilerOptions;
-    function getOptionNameMap(): OptionNameMap;
-    function createCompilerDiagnosticForInvalidCustomType(opt: CommandLineOptionOfCustomType): Diagnostic;
-    function parseCustomTypeOption(opt: CommandLineOptionOfCustomType, value: string, errors: Diagnostic[]): string | number;
-    function parseListTypeOption(opt: CommandLineOptionOfListType, value: string, errors: Diagnostic[]): (string | number)[] | undefined;
-    function parseCommandLine(commandLine: string[], readFile?: (path: string) => string): ParsedCommandLine;
-    /**
-      * Read tsconfig.json file
-      * @param fileName The path to the config file
-      */
-    function readConfigFile(fileName: string, readFile: (path: string) => string): {
-        config?: any;
-        error?: Diagnostic;
-    };
+    function getTargetOfBindingOrAssignmentElement(bindingElement: BindingOrAssignmentElement): BindingOrAssignmentElementTarget;
     /**
-      * Parse the text of the tsconfig.json file
-      * @param fileName The path to the config file
-      * @param jsonText The text of the config file
-      */
-    function parseConfigFileTextToJson(fileName: string, jsonText: string, stripComments?: boolean): {
-        config?: any;
-        error?: Diagnostic;
-    };
+     * Determines whether an BindingOrAssignmentElement is a rest element.
+     */
+    function getRestIndicatorOfBindingOrAssignmentElement(bindingElement: BindingOrAssignmentElement): BindingOrAssignmentElementRestIndicator;
     /**
-     * Generate tsconfig configuration when running command line "--init"
-     * @param options commandlineOptions to be generated into tsconfig.json
-     * @param fileNames array of filenames to be generated into tsconfig.json
+     * Gets the property name of a BindingOrAssignmentElement
      */
-    function generateTSConfig(options: CompilerOptions, fileNames: string[]): {
-        compilerOptions: Map<CompilerOptionsValue>;
-    };
+    function getPropertyNameOfBindingOrAssignmentElement(bindingElement: BindingOrAssignmentElement): PropertyName;
     /**
-      * Parse the contents of a config file (tsconfig.json).
-      * @param json The contents of the config file to parse
-      * @param host Instance of ParseConfigHost used to enumerate files in folder.
-      * @param basePath A root directory to resolve relative path entries in the config
-      *    file to. e.g. outDir
-      */
-    function parseJsonConfigFileContent(json: any, host: ParseConfigHost, basePath: string, existingOptions?: CompilerOptions, configFileName?: string, resolutionStack?: Path[]): ParsedCommandLine;
-    function convertCompileOnSaveOptionFromJson(jsonOption: any, basePath: string, errors: Diagnostic[]): boolean;
-    function convertCompilerOptionsFromJson(jsonOptions: any, basePath: string, configFileName?: string): {
-        options: CompilerOptions;
-        errors: Diagnostic[];
-    };
-    function convertTypingOptionsFromJson(jsonOptions: any, basePath: string, configFileName?: string): {
-        options: TypingOptions;
-        errors: Diagnostic[];
-    };
-}
-declare namespace ts {
-    function getDeclarationDiagnostics(host: EmitHost, resolver: EmitResolver, targetSourceFile: SourceFile): Diagnostic[];
-    function writeDeclarationFile(declarationFilePath: string, sourceFiles: SourceFile[], isBundledEmit: boolean, host: EmitHost, resolver: EmitResolver, emitterDiagnostics: DiagnosticCollection, emitOnlyDtsFiles: boolean): boolean;
+     * Gets the elements of a BindingOrAssignmentPattern
+     */
+    function getElementsOfBindingOrAssignmentPattern(name: BindingOrAssignmentPattern): BindingOrAssignmentElement[];
+    function convertToArrayAssignmentElement(element: BindingOrAssignmentElement): Expression;
+    function convertToObjectAssignmentElement(element: BindingOrAssignmentElement): ObjectLiteralElementLike;
+    function convertToAssignmentPattern(node: BindingOrAssignmentPattern): AssignmentPattern;
+    function convertToObjectAssignmentPattern(node: ObjectBindingOrAssignmentPattern): ObjectLiteralExpression;
+    function convertToArrayAssignmentPattern(node: ArrayBindingOrAssignmentPattern): ArrayLiteralExpression;
+    function convertToAssignmentElementTarget(node: BindingOrAssignmentElementTarget): Expression;
 }
 declare namespace ts {
-    type VisitResult<T extends Node> = T | T[];
     /**
-     * Similar to `reduceLeft`, performs a reduction against each child of a node.
-     * NOTE: Unlike `forEachChild`, this does *not* visit every node. Only nodes added to the
-     *       `nodeEdgeTraversalMap` above will be visited.
+     * Visits a Node using the supplied visitor, possibly returning a new Node in its place.
      *
-     * @param node The node containing the children to reduce.
-     * @param f The callback function
-     * @param initial The initial value to supply to the reduction.
+     * @param node The Node to visit.
+     * @param visitor The callback used to visit the Node.
+     * @param test A callback to execute to verify the Node is valid.
+     * @param lift An optional callback to execute to lift a NodeArray into a valid Node.
      */
-    function reduceEachChild<T>(node: Node, f: (memo: T, node: Node) => T, initial: T): T;
+    function visitNode<T extends Node>(node: T, visitor: Visitor, test?: (node: Node) => boolean, lift?: (node: NodeArray<Node>) => T): T;
     /**
      * Visits a Node using the supplied visitor, possibly returning a new Node in its place.
      *
      * @param node The Node to visit.
      * @param visitor The callback used to visit the Node.
      * @param test A callback to execute to verify the Node is valid.
-     * @param optional An optional value indicating whether the Node is itself optional.
-     * @param lift An optional callback to execute to lift a NodeArrayNode into a valid Node.
+     * @param lift An optional callback to execute to lift a NodeArray into a valid Node.
+     */
+    function visitNode<T extends Node>(node: T | undefined, visitor: Visitor, test?: (node: Node) => boolean, lift?: (node: NodeArray<Node>) => T): T | undefined;
+    /**
+     * Visits a NodeArray using the supplied visitor, possibly returning a new NodeArray in its place.
+     *
+     * @param nodes The NodeArray to visit.
+     * @param visitor The callback used to visit a Node.
+     * @param test A node test to execute for each node.
+     * @param start An optional value indicating the starting offset at which to start visiting.
+     * @param count An optional value indicating the maximum number of nodes to visit.
      */
-    function visitNode<T extends Node>(node: T, visitor: (node: Node) => VisitResult<Node>, test: (node: Node) => boolean, optional?: boolean, lift?: (node: NodeArray<Node>) => T): T;
-    function visitNode<T extends Node>(node: T, visitor: (node: Node) => VisitResult<Node>, test: (node: Node) => boolean, optional: boolean, lift: (node: NodeArray<Node>) => T, parenthesize: (node: Node, parentNode: Node) => Node, parentNode: Node): T;
+    function visitNodes<T extends Node>(nodes: NodeArray<T>, visitor: Visitor, test?: (node: Node) => boolean, start?: number, count?: number): NodeArray<T>;
     /**
      * Visits a NodeArray using the supplied visitor, possibly returning a new NodeArray in its place.
      *
@@ -8660,8 +11138,32 @@ declare namespace ts {
      * @param start An optional value indicating the starting offset at which to start visiting.
      * @param count An optional value indicating the maximum number of nodes to visit.
      */
-    function visitNodes<T extends Node>(nodes: NodeArray<T>, visitor: (node: Node) => VisitResult<Node>, test: (node: Node) => boolean, start?: number, count?: number): NodeArray<T>;
-    function visitNodes<T extends Node>(nodes: NodeArray<T>, visitor: (node: Node) => VisitResult<Node>, test: (node: Node) => boolean, start: number, count: number, parenthesize: (node: Node, parentNode: Node) => Node, parentNode: Node): NodeArray<T>;
+    function visitNodes<T extends Node>(nodes: NodeArray<T> | undefined, visitor: Visitor, test?: (node: Node) => boolean, start?: number, count?: number): NodeArray<T> | undefined;
+    /**
+     * Starts a new lexical environment and visits a statement list, ending the lexical environment
+     * and merging hoisted declarations upon completion.
+     */
+    function visitLexicalEnvironment(statements: NodeArray<Statement>, visitor: Visitor, context: TransformationContext, start?: number, ensureUseStrict?: boolean): NodeArray<Statement>;
+    /**
+     * Starts a new lexical environment and visits a parameter list, suspending the lexical
+     * environment upon completion.
+     */
+    function visitParameterList(nodes: NodeArray<ParameterDeclaration>, visitor: Visitor, context: TransformationContext, nodesVisitor?: typeof visitNodes): NodeArray<ParameterDeclaration>;
+    /**
+     * Resumes a suspended lexical environment and visits a function body, ending the lexical
+     * environment and merging hoisted declarations upon completion.
+     */
+    function visitFunctionBody(node: FunctionBody, visitor: Visitor, context: TransformationContext): FunctionBody;
+    /**
+     * Resumes a suspended lexical environment and visits a function body, ending the lexical
+     * environment and merging hoisted declarations upon completion.
+     */
+    function visitFunctionBody(node: FunctionBody | undefined, visitor: Visitor, context: TransformationContext): FunctionBody | undefined;
+    /**
+     * Resumes a suspended lexical environment and visits a concise body, ending the lexical
+     * environment and merging hoisted declarations upon completion.
+     */
+    function visitFunctionBody(node: ConciseBody, visitor: Visitor, context: TransformationContext): ConciseBody;
     /**
      * Visits each child of a Node using the supplied visitor, possibly returning a new Node of the same kind in its place.
      *
@@ -8669,21 +11171,34 @@ declare namespace ts {
      * @param visitor The callback used to visit each child.
      * @param context A lexical environment context for the visitor.
      */
-    function visitEachChild<T extends Node>(node: T, visitor: (node: Node) => VisitResult<Node>, context: LexicalEnvironment): T;
+    function visitEachChild<T extends Node>(node: T, visitor: Visitor, context: TransformationContext): T;
     /**
-     * Merges generated lexical declarations into the FunctionBody of a non-arrow function-like declaration.
+     * Visits each child of a Node using the supplied visitor, possibly returning a new Node of the same kind in its place.
      *
-     * @param node The ConciseBody of an arrow function.
-     * @param declarations The lexical declarations to merge.
+     * @param node The Node whose children will be visited.
+     * @param visitor The callback used to visit each child.
+     * @param context A lexical environment context for the visitor.
      */
-    function mergeFunctionBodyLexicalEnvironment(body: FunctionBody, declarations: Statement[]): FunctionBody;
+    function visitEachChild<T extends Node>(node: T | undefined, visitor: Visitor, context: TransformationContext, nodesVisitor?: typeof visitNodes, tokenVisitor?: Visitor): T | undefined;
+}
+declare namespace ts {
     /**
-     * Merges generated lexical declarations into the ConciseBody of an ArrowFunction.
+     * Similar to `reduceLeft`, performs a reduction against each child of a node.
+     * NOTE: Unlike `forEachChild`, this does *not* visit every node.
      *
-     * @param node The ConciseBody of an arrow function.
-     * @param declarations The lexical declarations to merge.
+     * @param node The node containing the children to reduce.
+     * @param initial The initial value to supply to the reduction.
+     * @param f The callback function
+     */
+    function reduceEachChild<T>(node: Node, initial: T, cbNode: (memo: T, node: Node) => T, cbNodeArray?: (memo: T, nodes: NodeArray<Node>) => T): T;
+    /**
+     * Merges generated lexical declarations into a new statement list.
+     */
+    function mergeLexicalEnvironment(statements: NodeArray<Statement>, declarations: Statement[]): NodeArray<Statement>;
+    /**
+     * Appends generated lexical declarations to an array of statements.
      */
-    function mergeFunctionBodyLexicalEnvironment(body: ConciseBody, declarations: Statement[]): ConciseBody;
+    function mergeLexicalEnvironment(statements: Statement[], declarations: Statement[]): Statement[];
     /**
      * Lifts a NodeArray containing only Statement nodes to a block.
      *
@@ -8695,63 +11210,93 @@ declare namespace ts {
      */
     function aggregateTransformFlags<T extends Node>(node: T): T;
     namespace Debug {
-        const failNotOptional: (message?: string) => void;
         const failBadSyntaxKind: (node: Node, message?: string) => void;
+        const assertEachNode: (nodes: Node[], test: (node: Node) => boolean, message?: string) => void;
         const assertNode: (node: Node, test: (node: Node) => boolean, message?: string) => void;
+        const assertOptionalNode: (node: Node, test: (node: Node) => boolean, message?: string) => void;
+        const assertOptionalToken: (node: Node, kind: SyntaxKind, message?: string) => void;
+        const assertMissingNode: (node: Node, message?: string) => void;
+        /**
+         * Injects debug information into frequently used types.
+         */
+        function enableDebugInfo(): void;
+    }
+}
+declare namespace ts {
+    function getOriginalNodeId(node: Node): number;
+    interface ExternalModuleInfo {
+        externalImports: (ImportDeclaration | ImportEqualsDeclaration | ExportDeclaration)[];
+        externalHelpersImportDeclaration: ImportDeclaration | undefined;
+        exportSpecifiers: Map<ExportSpecifier[]>;
+        exportedBindings: Identifier[][];
+        exportedNames: Identifier[];
+        exportEquals: ExportAssignment | undefined;
+        hasExportStarsToExportValues: boolean;
     }
+    function collectExternalModuleInfo(sourceFile: SourceFile, resolver: EmitResolver, compilerOptions: CompilerOptions): ExternalModuleInfo;
 }
 declare namespace ts {
+    enum FlattenLevel {
+        All = 0,
+        ObjectRest = 1,
+    }
     /**
-     * Flattens a destructuring assignment expression.
-     *
-     * @param root The destructuring assignment expression.
-     * @param needsValue Indicates whether the value from the right-hand-side of the
-     *                   destructuring assignment is needed as part of a larger expression.
-     * @param recordTempVariable A callback used to record new temporary variables.
-     * @param visitor An optional visitor to use to visit expressions.
-     */
-    function flattenDestructuringAssignment(context: TransformationContext, node: BinaryExpression, needsValue: boolean, recordTempVariable: (node: Identifier) => void, visitor?: (node: Node) => VisitResult<Node>): Expression;
-    /**
-     * Flattens binding patterns in a parameter declaration.
-     *
-     * @param node The ParameterDeclaration to flatten.
-     * @param value The rhs value for the binding pattern.
-     * @param visitor An optional visitor to use to visit expressions.
-     */
-    function flattenParameterDestructuring(context: TransformationContext, node: ParameterDeclaration, value: Expression, visitor?: (node: Node) => VisitResult<Node>): VariableDeclaration[];
-    /**
-     * Flattens binding patterns in a variable declaration.
+     * Flattens a DestructuringAssignment or a VariableDeclaration to an expression.
      *
-     * @param node The VariableDeclaration to flatten.
-     * @param value An optional rhs value for the binding pattern.
-     * @param visitor An optional visitor to use to visit expressions.
+     * @param node The node to flatten.
+     * @param visitor An optional visitor used to visit initializers.
+     * @param context The transformation context.
+     * @param level Indicates the extent to which flattening should occur.
+     * @param needsValue An optional value indicating whether the value from the right-hand-side of
+     * the destructuring assignment is needed as part of a larger expression.
+     * @param createAssignmentCallback An optional callback used to create the assignment expression.
      */
-    function flattenVariableDestructuring(context: TransformationContext, node: VariableDeclaration, value?: Expression, visitor?: (node: Node) => VisitResult<Node>, recordTempVariable?: (node: Identifier) => void): VariableDeclaration[];
+    function flattenDestructuringAssignment(node: VariableDeclaration | DestructuringAssignment, visitor: ((node: Node) => VisitResult<Node>) | undefined, context: TransformationContext, level: FlattenLevel, needsValue?: boolean, createAssignmentCallback?: (name: Identifier, value: Expression, location?: TextRange) => Expression): Expression;
     /**
-     * Flattens binding patterns in a variable declaration and transforms them into an expression.
+     * Flattens a VariableDeclaration or ParameterDeclaration to one or more variable declarations.
      *
-     * @param node The VariableDeclaration to flatten.
-     * @param recordTempVariable A callback used to record new temporary variables.
-     * @param nameSubstitution An optional callback used to substitute binding names.
-     * @param visitor An optional visitor to use to visit expressions.
+     * @param node The node to flatten.
+     * @param visitor An optional visitor used to visit initializers.
+     * @param context The transformation context.
+     * @param boundValue The value bound to the declaration.
+     * @param skipInitializer A value indicating whether to ignore the initializer of `node`.
+     * @param hoistTempVariables Indicates whether temporary variables should not be recorded in-line.
+     * @param level Indicates the extent to which flattening should occur.
      */
-    function flattenVariableDestructuringToExpression(context: TransformationContext, node: VariableDeclaration, recordTempVariable: (name: Identifier) => void, nameSubstitution?: (name: Identifier) => Expression, visitor?: (node: Node) => VisitResult<Node>): Expression;
+    function flattenDestructuringBinding(node: VariableDeclaration | ParameterDeclaration, visitor: (node: Node) => VisitResult<Node>, context: TransformationContext, level: FlattenLevel, rval?: Expression, hoistTempVariables?: boolean, skipInitializer?: boolean): VariableDeclaration[];
 }
 declare namespace ts {
     function transformTypeScript(context: TransformationContext): (node: SourceFile) => SourceFile;
 }
+declare namespace ts {
+    function transformES2017(context: TransformationContext): (node: SourceFile) => SourceFile;
+    const asyncSuperHelper: EmitHelper;
+    const advancedAsyncSuperHelper: EmitHelper;
+}
+declare namespace ts {
+    function transformESNext(context: TransformationContext): (node: SourceFile) => SourceFile;
+    function createAssignHelper(context: TransformationContext, attributesSegments: Expression[]): CallExpression;
+}
 declare namespace ts {
     function transformJsx(context: TransformationContext): (node: SourceFile) => SourceFile;
 }
 declare namespace ts {
-    function transformES7(context: TransformationContext): (node: SourceFile) => SourceFile;
+    function transformES2016(context: TransformationContext): (node: SourceFile) => SourceFile;
 }
 declare namespace ts {
-    function transformES6(context: TransformationContext): (node: SourceFile) => SourceFile;
+    function transformES2015(context: TransformationContext): (node: SourceFile) => SourceFile;
 }
 declare namespace ts {
     function transformGenerators(context: TransformationContext): (node: SourceFile) => SourceFile;
 }
+declare namespace ts {
+    /**
+     * Transforms ES5 syntax into ES3 syntax.
+     *
+     * @param context Context and state information for the transformation.
+     */
+    function transformES5(context: TransformationContext): (node: SourceFile) => SourceFile;
+}
 declare namespace ts {
     function transformModule(context: TransformationContext): (node: SourceFile) => SourceFile;
 }
@@ -8759,83 +11304,21 @@ declare namespace ts {
     function transformSystemModule(context: TransformationContext): (node: SourceFile) => SourceFile;
 }
 declare namespace ts {
-    function transformES6Module(context: TransformationContext): (node: SourceFile) => SourceFile;
+    function transformES2015Module(context: TransformationContext): (node: SourceFile) => SourceFile;
 }
 declare namespace ts {
-    interface TransformationResult {
-        /**
-         * Gets the transformed source files.
-         */
-        transformed: SourceFile[];
-        /**
-         * Emits the substitute for a node, if one is available; otherwise, emits the node.
-         *
-         * @param emitContext The current emit context.
-         * @param node The node to substitute.
-         * @param emitCallback A callback used to emit the node or its substitute.
-         */
-        emitNodeWithSubstitution(emitContext: EmitContext, node: Node, emitCallback: (emitContext: EmitContext, node: Node) => void): void;
-        /**
-         * Emits a node with possible notification.
-         *
-         * @param emitContext The current emit context.
-         * @param node The node to emit.
-         * @param emitCallback A callback used to emit the node.
-         */
-        emitNodeWithNotification(emitContext: EmitContext, node: Node, emitCallback: (emitContext: EmitContext, node: Node) => void): void;
-    }
-    interface TransformationContext extends LexicalEnvironment {
-        getCompilerOptions(): CompilerOptions;
-        getEmitResolver(): EmitResolver;
-        getEmitHost(): EmitHost;
-        /**
-         * Hoists a function declaration to the containing scope.
-         */
-        hoistFunctionDeclaration(node: FunctionDeclaration): void;
-        /**
-         * Hoists a variable declaration to the containing scope.
-         */
-        hoistVariableDeclaration(node: Identifier): void;
-        /**
-         * Enables expression substitutions in the pretty printer for the provided SyntaxKind.
-         */
-        enableSubstitution(kind: SyntaxKind): void;
-        /**
-         * Determines whether expression substitutions are enabled for the provided node.
-         */
-        isSubstitutionEnabled(node: Node): boolean;
-        /**
-         * Hook used by transformers to substitute expressions just before they
-         * are emitted by the pretty printer.
-         */
-        onSubstituteNode?: (emitContext: EmitContext, node: Node) => Node;
-        /**
-         * Enables before/after emit notifications in the pretty printer for the provided
-         * SyntaxKind.
-         */
-        enableEmitNotification(kind: SyntaxKind): void;
-        /**
-         * Determines whether before/after emit notifications should be raised in the pretty
-         * printer when it emits a node.
-         */
-        isEmitNotificationEnabled(node: Node): boolean;
-        /**
-         * Hook used to allow transformers to capture state before or after
-         * the printer emits a node.
-         */
-        onEmitNode?: (emitContext: EmitContext, node: Node, emitCallback: (emitContext: EmitContext, node: Node) => void) => void;
-    }
-    type Transformer = (context: TransformationContext) => (node: SourceFile) => SourceFile;
-    function getTransformers(compilerOptions: CompilerOptions): Transformer[];
+    function getTransformers(compilerOptions: CompilerOptions, customTransformers?: CustomTransformers): TransformerFactory<SourceFile>[];
     /**
      * Transforms an array of SourceFiles by passing them through each transformer.
      *
      * @param resolver The emit resolver provided by the checker.
-     * @param host The emit host.
-     * @param sourceFiles An array of source files
-     * @param transforms An array of Transformers.
+     * @param host The emit host object used to interact with the file system.
+     * @param options Compiler options to surface in the `TransformationContext`.
+     * @param nodes An array of nodes to transform.
+     * @param transforms An array of `TransformerFactory` callbacks.
+     * @param allowDtsFiles A value indicating whether to allow the transformation of .d.ts files.
      */
-    function transformFiles(resolver: EmitResolver, host: EmitHost, sourceFiles: SourceFile[], transformers: Transformer[]): TransformationResult;
+    function transformNodes<T extends Node>(resolver: EmitResolver, host: EmitHost, options: CompilerOptions, nodes: T[], transformers: TransformerFactory<T>[], allowDtsFiles: boolean): TransformationResult<T>;
 }
 declare namespace ts {
     interface SourceMapWriter {
@@ -8844,10 +11327,9 @@ declare namespace ts {
          *
          * @param filePath The path to the generated output file.
          * @param sourceMapFilePath The path to the output source map file.
-         * @param sourceFiles The input source files for the program.
-         * @param isBundledEmit A value indicating whether the generated output file is a bundle.
+         * @param sourceFileOrBundle The input source file or bundle for the program.
          */
-        initialize(filePath: string, sourceMapFilePath: string, sourceFiles: SourceFile[], isBundledEmit: boolean): void;
+        initialize(filePath: string, sourceMapFilePath: string, sourceFileOrBundle: SourceFile | Bundle): void;
         /**
          * Reset the SourceMapWriter to an empty state.
          */
@@ -8857,7 +11339,7 @@ declare namespace ts {
          *
          * @param sourceFile The source file.
          */
-        setSourceFile(sourceFile: SourceFile): void;
+        setSourceFile(sourceFile: SourceMapSource): void;
         /**
          * Emits a mapping.
          *
@@ -8870,11 +11352,11 @@ declare namespace ts {
         /**
          * Emits a node with possible leading and trailing source maps.
          *
-         * @param emitContext The current emit context
+         * @param hint The current emit context
          * @param node The node to emit.
          * @param emitCallback The callback used to emit the node.
          */
-        emitNodeWithSourceMap(emitContext: EmitContext, node: Node, emitCallback: (emitContext: EmitContext, node: Node) => void): void;
+        emitNodeWithSourceMap(hint: EmitHint, node: Node, emitCallback: (hint: EmitHint, node: Node) => void): void;
         /**
          * Emits a token of a node node with possible leading and trailing source maps.
          *
@@ -8903,18 +11385,29 @@ declare namespace ts {
     interface CommentWriter {
         reset(): void;
         setSourceFile(sourceFile: SourceFile): void;
-        emitNodeWithComments(emitContext: EmitContext, node: Node, emitCallback: (emitContext: EmitContext, node: Node) => void): void;
+        setWriter(writer: EmitTextWriter): void;
+        emitNodeWithComments(hint: EmitHint, node: Node, emitCallback: (hint: EmitHint, node: Node) => void): void;
         emitBodyWithDetachedComments(node: Node, detachedRange: TextRange, emitCallback: (node: Node) => void): void;
         emitTrailingCommentsOfPosition(pos: number): void;
+        emitLeadingCommentsOfPosition(pos: number): void;
     }
-    function createCommentWriter(host: EmitHost, writer: EmitTextWriter, sourceMap: SourceMapWriter): CommentWriter;
+    function createCommentWriter(printerOptions: PrinterOptions, emitPos: ((pos: number) => void) | undefined): CommentWriter;
 }
 declare namespace ts {
-    function emitFiles(resolver: EmitResolver, host: EmitHost, targetSourceFile: SourceFile, emitOnlyDtsFiles?: boolean): EmitResult;
+    /**
+     * Iterates over the source files that are expected to have an emit output.
+     *
+     * @param host An EmitHost.
+     * @param action The action to execute.
+     * @param sourceFilesOrTargetSourceFile
+     *   If an array, the full list of source files to emit.
+     *   Else, calls `getSourceFilesToEmit` with the (optional) target source file to determine the list of source files to emit.
+     */
+    function forEachEmittedFile(host: EmitHost, action: (emitFileNames: EmitFileNames, sourceFileOrBundle: SourceFile | Bundle, emitOnlyDtsFiles: boolean) => void, sourceFilesOrTargetSourceFile?: SourceFile[] | SourceFile, emitOnlyDtsFiles?: boolean): void;
+    function emitFiles(resolver: EmitResolver, host: EmitHost, targetSourceFile: SourceFile, emitOnlyDtsFiles?: boolean, transformers?: TransformerFactory<SourceFile>[]): EmitResult;
+    function createPrinter(printerOptions?: PrinterOptions, handlers?: PrintHandlers): Printer;
 }
 declare namespace ts {
-    /** The version of the TypeScript compiler release */
-    const version = "2.1.0";
     function findConfigFile(searchPath: string, fileExists: (fileName: string) => boolean, configName?: string): string;
     function resolveTripleslashReference(moduleName: string, containingFile: string): string;
     function computeCommonSourceDirectoryOfFilenames(fileNames: string[], currentDirectory: string, getCanonicalFileName: (fileName: string) => string): string;
@@ -8926,8 +11419,28 @@ declare namespace ts {
         getNewLine(): string;
     }
     function formatDiagnostics(diagnostics: Diagnostic[], host: FormatDiagnosticsHost): string;
+    function formatDiagnosticsWithColorAndContext(diagnostics: Diagnostic[], host: FormatDiagnosticsHost): string;
     function flattenDiagnosticMessageText(messageText: string | DiagnosticMessageChain, newLine: string): string;
+    /**
+     * Create a new 'Program' instance. A Program is an immutable collection of 'SourceFile's and a 'CompilerOptions'
+     * that represent a compilation unit.
+     *
+     * Creating a program proceeds from a set of root files, expanding the set of inputs by following imports and
+     * triple-slash-reference-path directives transitively. '@types' and triple-slash-reference-types are also pulled in.
+     *
+     * @param rootNames - A set of root files.
+     * @param options - The compiler options which should be used.
+     * @param host - The host interacts with the underlying file system.
+     * @param oldProgram - Reuses an old program structure.
+     * @returns A 'Program' object.
+     */
     function createProgram(rootNames: string[], options: CompilerOptions, host?: CompilerHost, oldProgram?: Program): Program;
+    /**
+     * Returns a DiagnosticMessage if we won't include a resolved module due to its extension.
+     * The DiagnosticMessage's parameters are the imported module name, and the filename it resolved to.
+     * This returns a diagnostic even if the module will be an untyped module.
+     */
+    function getResolutionDiagnostic(options: CompilerOptions, {extension}: ResolvedModuleFull): DiagnosticMessage | undefined;
 }
 declare namespace ts {
     interface SourceFile {
@@ -8941,7 +11454,9 @@ declare namespace ts {
         getChildCount(sourceFile?: SourceFile): number;
         getChildAt(index: number, sourceFile?: SourceFile): Node;
         getChildren(sourceFile?: SourceFile): Node[];
+        getChildren(sourceFile?: SourceFileLike): Node[];
         getStart(sourceFile?: SourceFile, includeJsDocComment?: boolean): number;
+        getStart(sourceFile?: SourceFileLike, includeJsDocComment?: boolean): number;
         getFullStart(): number;
         getEnd(): number;
         getWidth(sourceFile?: SourceFile): number;
@@ -8951,32 +11466,35 @@ declare namespace ts {
         getText(sourceFile?: SourceFile): string;
         getFirstToken(sourceFile?: SourceFile): Node;
         getLastToken(sourceFile?: SourceFile): Node;
+        forEachChild<T>(cbNode: (node: Node) => T | undefined, cbNodeArray?: (nodes: NodeArray<Node>) => T | undefined): T | undefined;
     }
     interface Symbol {
         getFlags(): SymbolFlags;
         getName(): string;
-        getDeclarations(): Declaration[];
+        getDeclarations(): Declaration[] | undefined;
         getDocumentationComment(): SymbolDisplayPart[];
+        getJsDocTags(): JSDocTagInfo[];
     }
     interface Type {
         getFlags(): TypeFlags;
-        getSymbol(): Symbol;
+        getSymbol(): Symbol | undefined;
         getProperties(): Symbol[];
-        getProperty(propertyName: string): Symbol;
+        getProperty(propertyName: string): Symbol | undefined;
         getApparentProperties(): Symbol[];
         getCallSignatures(): Signature[];
         getConstructSignatures(): Signature[];
-        getStringIndexType(): Type;
-        getNumberIndexType(): Type;
-        getBaseTypes(): ObjectType[];
+        getStringIndexType(): Type | undefined;
+        getNumberIndexType(): Type | undefined;
+        getBaseTypes(): BaseType[] | undefined;
         getNonNullableType(): Type;
     }
     interface Signature {
         getDeclaration(): SignatureDeclaration;
-        getTypeParameters(): Type[];
+        getTypeParameters(): TypeParameter[] | undefined;
         getParameters(): Symbol[];
         getReturnType(): Type;
         getDocumentationComment(): SymbolDisplayPart[];
+        getJsDocTags(): JSDocTagInfo[];
     }
     interface SourceFile {
         version: string;
@@ -8984,10 +11502,17 @@ declare namespace ts {
         nameTable: Map<number>;
         getNamedDeclarations(): Map<Declaration[]>;
         getLineAndCharacterOfPosition(pos: number): LineAndCharacter;
+        getLineEndOfPosition(pos: number): number;
         getLineStarts(): number[];
         getPositionOfLineAndCharacter(line: number, character: number): number;
         update(newText: string, textChangeRange: TextChangeRange): SourceFile;
     }
+    interface SourceFileLike {
+        getLineAndCharacterOfPosition(pos: number): LineAndCharacter;
+    }
+    interface SourceMapSource {
+        getLineAndCharacterOfPosition(pos: number): LineAndCharacter;
+    }
     /**
      * Represents an immutable snapshot of a script at a specified time.Once acquired, the
      * snapshot is observably immutable. i.e. the same calls with the same parameters will return
@@ -9046,6 +11571,10 @@ declare namespace ts {
         resolveTypeReferenceDirectives?(typeDirectiveNames: string[], containingFile: string): ResolvedTypeReferenceDirective[];
         directoryExists?(directoryName: string): boolean;
         getDirectories?(directoryName: string): string[];
+        /**
+         * Gets a set of custom transformers to use during emit.
+         */
+        getCustomTransformers?(): CustomTransformers | undefined;
     }
     interface LanguageService {
         cleanupSemanticCache(): void;
@@ -9081,6 +11610,7 @@ declare namespace ts {
         getOccurrencesAtPosition(fileName: string, position: number): ReferenceEntry[];
         getNavigateToItems(searchValue: string, maxResultCount?: number, fileName?: string, excludeDtsFiles?: boolean): NavigateToItem[];
         getNavigationBarItems(fileName: string): NavigationBarItem[];
+        getNavigationTree(fileName: string): NavigationTree;
         getOutliningSpans(fileName: string): OutliningSpan[];
         getTodoComments(fileName: string, descriptors: TodoCommentDescriptor[]): TodoComment[];
         getBraceMatchingAtPosition(fileName: string, position: number): TextSpan[];
@@ -9090,6 +11620,9 @@ declare namespace ts {
         getFormattingEditsAfterKeystroke(fileName: string, position: number, key: string, options: FormatCodeOptions | FormatCodeSettings): TextChange[];
         getDocCommentTemplateAtPosition(fileName: string, position: number): TextInsertion;
         isValidBraceCompletionAtPosition(fileName: string, position: number, openingBrace: number): boolean;
+        getCodeFixesAtPosition(fileName: string, start: number, end: number, errorCodes: number[], formatOptions: FormatCodeSettings): CodeAction[];
+        getApplicableRefactors(fileName: string, positionOrRaneg: number | TextRange): ApplicableRefactorInfo[];
+        getEditsForRefactor(fileName: string, formatOptions: FormatCodeSettings, positionOrRange: number | TextRange, refactorName: string, actionName: string): RefactorEditInfo | undefined;
         getEmitOutput(fileName: string, emitOnlyDtsFiles?: boolean): EmitOutput;
         getProgram(): Program;
         getNonBoundSourceFile(fileName: string): SourceFile;
@@ -9106,11 +11639,17 @@ declare namespace ts {
     }
     interface ClassifiedSpan {
         textSpan: TextSpan;
-        classificationType: string;
+        classificationType: ClassificationTypeNames;
     }
+    /**
+     * Navigation bar interface designed for visual studio's dual-column layout.
+     * This does not form a proper tree.
+     * The navbar is returned as a list of top-level items, each of which has a list of child items.
+     * Child items always have an empty array for their `childItems`.
+     */
     interface NavigationBarItem {
         text: string;
-        kind: string;
+        kind: ScriptElementKind;
         kindModifiers: string;
         spans: TextSpan[];
         childItems: NavigationBarItem[];
@@ -9118,6 +11657,24 @@ declare namespace ts {
         bolded: boolean;
         grayed: boolean;
     }
+    /**
+     * Node in a tree of nested declarations in a file.
+     * The top node is always a script or module node.
+     */
+    interface NavigationTree {
+        /** Name of the declaration, or a short description, e.g. "<class>". */
+        text: string;
+        kind: ScriptElementKind;
+        /** ScriptElementKindModifier separated by commas, e.g. "public,abstract" */
+        kindModifiers: string;
+        /**
+         * Spans of the nodes that generated this declaration.
+         * There will be more than one if this is the result of merging.
+         */
+        spans: TextSpan[];
+        /** Present if non-empty */
+        childItems?: NavigationTree[];
+    }
     interface TodoCommentDescriptor {
         text: string;
         priority: number;
@@ -9131,50 +11688,110 @@ declare namespace ts {
         span: TextSpan;
         newText: string;
     }
+    interface FileTextChanges {
+        fileName: string;
+        textChanges: TextChange[];
+    }
+    interface CodeAction {
+        /** Description of the code action to display in the UI of the editor */
+        description: string;
+        /** Text changes to apply to each file as part of the code action */
+        changes: FileTextChanges[];
+    }
+    /**
+     * A set of one or more available refactoring actions, grouped under a parent refactoring.
+     */
+    interface ApplicableRefactorInfo {
+        /**
+         * The programmatic name of the refactoring
+         */
+        name: string;
+        /**
+         * A description of this refactoring category to show to the user.
+         * If the refactoring gets inlined (see below), this text will not be visible.
+         */
+        description: string;
+        /**
+         * Inlineable refactorings can have their actions hoisted out to the top level
+         * of a context menu. Non-inlineanable refactorings should always be shown inside
+         * their parent grouping.
+         *
+         * If not specified, this value is assumed to be 'true'
+         */
+        inlineable?: boolean;
+        actions: RefactorActionInfo[];
+    }
+    /**
+     * Represents a single refactoring action - for example, the "Extract Method..." refactor might
+     * offer several actions, each corresponding to a surround class or closure to extract into.
+     */
+    type RefactorActionInfo = {
+        /**
+         * The programmatic name of the refactoring action
+         */
+        name: string;
+        /**
+         * A description of this refactoring action to show to the user.
+         * If the parent refactoring is inlined away, this will be the only text shown,
+         * so this description should make sense by itself if the parent is inlineable=true
+         */
+        description: string;
+    };
+    /**
+     * A set of edits to make in response to a refactor action, plus an optional
+     * location where renaming should be invoked from
+     */
+    type RefactorEditInfo = {
+        edits: FileTextChanges[];
+        renameFilename?: string;
+        renameLocation?: number;
+    };
     interface TextInsertion {
         newText: string;
         /** The position in newText the caret should point to after the insertion. */
         caretOffset: number;
     }
-    interface RenameLocation {
+    interface DocumentSpan {
         textSpan: TextSpan;
         fileName: string;
     }
-    interface ReferenceEntry {
-        textSpan: TextSpan;
-        fileName: string;
+    interface RenameLocation extends DocumentSpan {
+    }
+    interface ReferenceEntry extends DocumentSpan {
         isWriteAccess: boolean;
         isDefinition: boolean;
+        isInString?: true;
     }
-    interface ImplementationLocation {
-        textSpan: TextSpan;
-        fileName: string;
+    interface ImplementationLocation extends DocumentSpan {
+        kind: ScriptElementKind;
+        displayParts: SymbolDisplayPart[];
     }
     interface DocumentHighlights {
         fileName: string;
         highlightSpans: HighlightSpan[];
     }
-    namespace HighlightSpanKind {
-        const none = "none";
-        const definition = "definition";
-        const reference = "reference";
-        const writtenReference = "writtenReference";
+    enum HighlightSpanKind {
+        none = "none",
+        definition = "definition",
+        reference = "reference",
+        writtenReference = "writtenReference",
     }
     interface HighlightSpan {
         fileName?: string;
+        isInString?: true;
         textSpan: TextSpan;
-        kind: string;
+        kind: HighlightSpanKind;
     }
     interface NavigateToItem {
         name: string;
-        kind: string;
+        kind: ScriptElementKind;
         kindModifiers: string;
         matchKind: string;
         isCaseSensitive: boolean;
         fileName: string;
         textSpan: TextSpan;
         containerName: string;
-        containerKind: string;
+        containerKind: ScriptElementKind;
     }
     enum IndentStyle {
         None = 0,
@@ -9191,16 +11808,17 @@ declare namespace ts {
     }
     interface EditorSettings {
         baseIndentSize?: number;
-        indentSize: number;
-        tabSize: number;
-        newLineCharacter: string;
-        convertTabsToSpaces: boolean;
-        indentStyle: IndentStyle;
+        indentSize?: number;
+        tabSize?: number;
+        newLineCharacter?: string;
+        convertTabsToSpaces?: boolean;
+        indentStyle?: IndentStyle;
     }
     interface FormatCodeOptions extends EditorOptions {
         InsertSpaceAfterCommaDelimiter: boolean;
         InsertSpaceAfterSemicolonInForStatements: boolean;
         InsertSpaceBeforeAndAfterBinaryOperators: boolean;
+        InsertSpaceAfterConstructor?: boolean;
         InsertSpaceAfterKeywordsInControlFlowStatements: boolean;
         InsertSpaceAfterFunctionKeywordForAnonymousFunctions: boolean;
         InsertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis: boolean;
@@ -9209,30 +11827,33 @@ declare namespace ts {
         InsertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces: boolean;
         InsertSpaceAfterOpeningAndBeforeClosingJsxExpressionBraces?: boolean;
         InsertSpaceAfterTypeAssertion?: boolean;
+        InsertSpaceBeforeFunctionParenthesis?: boolean;
         PlaceOpenBraceOnNewLineForFunctions: boolean;
         PlaceOpenBraceOnNewLineForControlBlocks: boolean;
     }
     interface FormatCodeSettings extends EditorSettings {
-        insertSpaceAfterCommaDelimiter: boolean;
-        insertSpaceAfterSemicolonInForStatements: boolean;
-        insertSpaceBeforeAndAfterBinaryOperators: boolean;
-        insertSpaceAfterKeywordsInControlFlowStatements: boolean;
-        insertSpaceAfterFunctionKeywordForAnonymousFunctions: boolean;
-        insertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis: boolean;
-        insertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets: boolean;
+        insertSpaceAfterCommaDelimiter?: boolean;
+        insertSpaceAfterSemicolonInForStatements?: boolean;
+        insertSpaceBeforeAndAfterBinaryOperators?: boolean;
+        insertSpaceAfterConstructor?: boolean;
+        insertSpaceAfterKeywordsInControlFlowStatements?: boolean;
+        insertSpaceAfterFunctionKeywordForAnonymousFunctions?: boolean;
+        insertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis?: boolean;
+        insertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets?: boolean;
         insertSpaceAfterOpeningAndBeforeClosingNonemptyBraces?: boolean;
-        insertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces: boolean;
-        insertSpaceAfterOpeningAndBeforeClosingJsxExpressionBraces: boolean;
+        insertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces?: boolean;
+        insertSpaceAfterOpeningAndBeforeClosingJsxExpressionBraces?: boolean;
         insertSpaceAfterTypeAssertion?: boolean;
-        placeOpenBraceOnNewLineForFunctions: boolean;
-        placeOpenBraceOnNewLineForControlBlocks: boolean;
+        insertSpaceBeforeFunctionParenthesis?: boolean;
+        placeOpenBraceOnNewLineForFunctions?: boolean;
+        placeOpenBraceOnNewLineForControlBlocks?: boolean;
     }
     interface DefinitionInfo {
         fileName: string;
         textSpan: TextSpan;
-        kind: string;
+        kind: ScriptElementKind;
         name: string;
-        containerKind: string;
+        containerKind: ScriptElementKind;
         containerName: string;
     }
     interface ReferencedSymbolDefinitionInfo extends DefinitionInfo {
@@ -9270,19 +11891,24 @@ declare namespace ts {
         text: string;
         kind: string;
     }
+    interface JSDocTagInfo {
+        name: string;
+        text?: string;
+    }
     interface QuickInfo {
-        kind: string;
+        kind: ScriptElementKind;
         kindModifiers: string;
         textSpan: TextSpan;
         displayParts: SymbolDisplayPart[];
         documentation: SymbolDisplayPart[];
+        tags: JSDocTagInfo[];
     }
     interface RenameInfo {
         canRename: boolean;
         localizedErrorMessage: string;
         displayName: string;
         fullDisplayName: string;
-        kind: string;
+        kind: ScriptElementKind;
         kindModifiers: string;
         triggerSpan: TextSpan;
     }
@@ -9306,6 +11932,7 @@ declare namespace ts {
         separatorDisplayParts: SymbolDisplayPart[];
         parameters: SignatureHelpParameter[];
         documentation: SymbolDisplayPart[];
+        tags: JSDocTagInfo[];
     }
     /**
      * Represents a set of signature help items, and the preferred item that should be selected.
@@ -9318,28 +11945,33 @@ declare namespace ts {
         argumentCount: number;
     }
     interface CompletionInfo {
+        isGlobalCompletion: boolean;
         isMemberCompletion: boolean;
+        /**
+         * true when the current location also allows for a new identifier
+         */
         isNewIdentifierLocation: boolean;
         entries: CompletionEntry[];
     }
     interface CompletionEntry {
         name: string;
-        kind: string;
+        kind: ScriptElementKind;
         kindModifiers: string;
         sortText: string;
         /**
-          * An optional span that indicates the text to be replaced by this completion item. It will be
-          * set if the required span differs from the one generated by the default replacement behavior and should
-          * be used in that case
-          */
+         * An optional span that indicates the text to be replaced by this completion item. It will be
+         * set if the required span differs from the one generated by the default replacement behavior and should
+         * be used in that case
+         */
         replacementSpan?: TextSpan;
     }
     interface CompletionEntryDetails {
         name: string;
-        kind: string;
+        kind: ScriptElementKind;
         kindModifiers: string;
         displayParts: SymbolDisplayPart[];
         documentation: SymbolDisplayPart[];
+        tags: JSDocTagInfo[];
     }
     interface OutliningSpan {
         /** The span of the document to actually collapse. */
@@ -9349,9 +11981,9 @@ declare namespace ts {
         /** The text to display in the editor for the collapsed region. */
         bannerText: string;
         /**
-          * Whether or not this region should be automatically collapsed when
-          * the 'Collapse to Definitions' command is invoked.
-          */
+         * Whether or not this region should be automatically collapsed when
+         * the 'Collapse to Definitions' command is invoked.
+         */
         autoCollapse: boolean;
     }
     interface EmitOutput {
@@ -9420,103 +12052,107 @@ declare namespace ts {
         getClassificationsForLine(text: string, lexState: EndOfLineState, syntacticClassifierAbsent: boolean): ClassificationResult;
         getEncodedLexicalClassifications(text: string, endOfLineState: EndOfLineState, syntacticClassifierAbsent: boolean): Classifications;
     }
-    namespace ScriptElementKind {
-        const unknown = "";
-        const warning = "warning";
+    enum ScriptElementKind {
+        unknown = "",
+        warning = "warning",
         /** predefined type (void) or keyword (class) */
-        const keyword = "keyword";
+        keyword = "keyword",
         /** top level script node */
-        const scriptElement = "script";
+        scriptElement = "script",
         /** module foo {} */
-        const moduleElement = "module";
+        moduleElement = "module",
         /** class X {} */
-        const classElement = "class";
+        classElement = "class",
         /** var x = class X {} */
-        const localClassElement = "local class";
+        localClassElement = "local class",
         /** interface Y {} */
-        const interfaceElement = "interface";
+        interfaceElement = "interface",
         /** type T = ... */
-        const typeElement = "type";
+        typeElement = "type",
         /** enum E */
-        const enumElement = "enum";
-        const enumMemberElement = "const";
+        enumElement = "enum",
+        enumMemberElement = "enum member",
         /**
          * Inside module and script only
          * const v = ..
          */
-        const variableElement = "var";
+        variableElement = "var",
         /** Inside function */
-        const localVariableElement = "local var";
+        localVariableElement = "local var",
         /**
          * Inside module and script only
          * function f() { }
          */
-        const functionElement = "function";
+        functionElement = "function",
         /** Inside function */
-        const localFunctionElement = "local function";
+        localFunctionElement = "local function",
         /** class X { [public|private]* foo() {} } */
-        const memberFunctionElement = "method";
+        memberFunctionElement = "method",
         /** class X { [public|private]* [get|set] foo:number; } */
-        const memberGetAccessorElement = "getter";
-        const memberSetAccessorElement = "setter";
+        memberGetAccessorElement = "getter",
+        memberSetAccessorElement = "setter",
         /**
          * class X { [public|private]* foo:number; }
          * interface Y { foo:number; }
          */
-        const memberVariableElement = "property";
+        memberVariableElement = "property",
         /** class X { constructor() { } } */
-        const constructorImplementationElement = "constructor";
+        constructorImplementationElement = "constructor",
         /** interface Y { ():number; } */
-        const callSignatureElement = "call";
+        callSignatureElement = "call",
         /** interface Y { []:number; } */
-        const indexSignatureElement = "index";
+        indexSignatureElement = "index",
         /** interface Y { new():Y; } */
-        const constructSignatureElement = "construct";
+        constructSignatureElement = "construct",
         /** function foo(*Y*: string) */
-        const parameterElement = "parameter";
-        const typeParameterElement = "type parameter";
-        const primitiveType = "primitive type";
-        const label = "label";
-        const alias = "alias";
-        const constElement = "const";
-        const letElement = "let";
-        const directory = "directory";
-        const externalModuleName = "external module name";
-    }
-    namespace ScriptElementKindModifier {
-        const none = "";
-        const publicMemberModifier = "public";
-        const privateMemberModifier = "private";
-        const protectedMemberModifier = "protected";
-        const exportedModifier = "export";
-        const ambientModifier = "declare";
-        const staticModifier = "static";
-        const abstractModifier = "abstract";
-    }
-    class ClassificationTypeNames {
-        static comment: string;
-        static identifier: string;
-        static keyword: string;
-        static numericLiteral: string;
-        static operator: string;
-        static stringLiteral: string;
-        static whiteSpace: string;
-        static text: string;
-        static punctuation: string;
-        static className: string;
-        static enumName: string;
-        static interfaceName: string;
-        static moduleName: string;
-        static typeParameterName: string;
-        static typeAliasName: string;
-        static parameterName: string;
-        static docCommentTagName: string;
-        static jsxOpenTagName: string;
-        static jsxCloseTagName: string;
-        static jsxSelfClosingTagName: string;
-        static jsxAttribute: string;
-        static jsxText: string;
-        static jsxAttributeStringLiteralValue: string;
+        parameterElement = "parameter",
+        typeParameterElement = "type parameter",
+        primitiveType = "primitive type",
+        label = "label",
+        alias = "alias",
+        constElement = "const",
+        letElement = "let",
+        directory = "directory",
+        externalModuleName = "external module name",
+        /**
+         * <JsxTagName attribute1 attribute2={0} />
+         */
+        jsxAttribute = "JSX attribute",
+    }
+    enum ScriptElementKindModifier {
+        none = "",
+        publicMemberModifier = "public",
+        privateMemberModifier = "private",
+        protectedMemberModifier = "protected",
+        exportedModifier = "export",
+        ambientModifier = "declare",
+        staticModifier = "static",
+        abstractModifier = "abstract",
+    }
+    enum ClassificationTypeNames {
+        comment = "comment",
+        identifier = "identifier",
+        keyword = "keyword",
+        numericLiteral = "number",
+        operator = "operator",
+        stringLiteral = "string",
+        whiteSpace = "whitespace",
+        text = "text",
+        punctuation = "punctuation",
+        className = "class name",
+        enumName = "enum name",
+        interfaceName = "interface name",
+        moduleName = "module name",
+        typeParameterName = "type parameter name",
+        typeAliasName = "type alias name",
+        parameterName = "parameter name",
+        docCommentTagName = "doc comment tag name",
+        jsxOpenTagName = "jsx open tag name",
+        jsxCloseTagName = "jsx close tag name",
+        jsxSelfClosingTagName = "jsx self closing tag name",
+        jsxAttribute = "jsx attribute",
+        jsxText = "jsx text",
+        jsxAttributeStringLiteralValue = "jsx attribute string literal value",
     }
     enum ClassificationType {
         comment = 1,
@@ -9557,6 +12193,7 @@ declare namespace ts {
     }
     function getMeaningFromDeclaration(node: Node): SemanticMeaning;
     function getMeaningFromLocation(node: Node): SemanticMeaning;
+    function isInRightSideOfInternalImportEqualsDeclaration(node: Node): boolean;
     function isCallExpressionTarget(node: Node): boolean;
     function isNewExpressionTarget(node: Node): boolean;
     function climbPastPropertyAccess(node: Node): Node;
@@ -9569,17 +12206,14 @@ declare namespace ts {
     function isNameOfFunctionDeclaration(node: Node): boolean;
     function isLiteralNameOfPropertyDeclarationOrIndexAccess(node: Node): boolean;
     function isExpressionOfExternalModuleImportEqualsDeclaration(node: Node): boolean;
-    /** Returns true if the position is within a comment */
-    function isInsideComment(sourceFile: SourceFile, token: Node, position: number): boolean;
     function getContainerNode(node: Node): Declaration;
-    function getNodeKind(node: Node): string;
-    function getStringLiteralTypeForNode(node: StringLiteral | LiteralTypeNode, typeChecker: TypeChecker): LiteralType;
+    function getNodeKind(node: Node): ScriptElementKind;
     function isThis(node: Node): boolean;
     interface ListItemInfo {
         listItemIndex: number;
         list: Node;
     }
-    function getLineStartPositionForPosition(position: number, sourceFile: SourceFile): number;
+    function getLineStartPositionForPosition(position: number, sourceFile: SourceFileLike): number;
     function rangeContainsRange(r1: TextRange, r2: TextRange): boolean;
     function startEndContainsRange(start: number, end: number, range: TextRange): boolean;
     function rangeContainsStartEnd(range: TextRange, start: number, end: number): boolean;
@@ -9589,61 +12223,68 @@ declare namespace ts {
     function isCompletedNode(n: Node, sourceFile: SourceFile): boolean;
     function findListItemInfo(node: Node): ListItemInfo;
     function hasChildOfKind(n: Node, kind: SyntaxKind, sourceFile?: SourceFile): boolean;
-    function findChildOfKind(n: Node, kind: SyntaxKind, sourceFile?: SourceFile): Node;
+    function findChildOfKind(n: Node, kind: SyntaxKind, sourceFile?: SourceFileLike): Node | undefined;
     function findContainingList(node: Node): Node;
-    function getTouchingWord(sourceFile: SourceFile, position: number, includeJsDocComment?: boolean): Node;
-    function getTouchingPropertyName(sourceFile: SourceFile, position: number, includeJsDocComment?: boolean): Node;
-    /** Returns the token if position is in [start, end) or if position === end and includeItemAtEndPosition(token) === true */
-    function getTouchingToken(sourceFile: SourceFile, position: number, includeItemAtEndPosition?: (n: Node) => boolean, includeJsDocComment?: boolean): Node;
+    function getTouchingWord(sourceFile: SourceFile, position: number, includeJsDocComment: boolean): Node;
+    function getTouchingPropertyName(sourceFile: SourceFile, position: number, includeJsDocComment: boolean): Node;
+    /**
+     * Returns the token if position is in [start, end).
+     * If position === end, returns the preceding token if includeItemAtEndPosition(previousToken) === true
+     */
+    function getTouchingToken(sourceFile: SourceFile, position: number, includeJsDocComment: boolean, includePrecedingTokenAtEndPosition?: (n: Node) => boolean): Node;
     /** Returns a token if position is in [start-of-leading-trivia, end) */
-    function getTokenAtPosition(sourceFile: SourceFile, position: number, includeJsDocComment?: boolean): Node;
-    /**
-      * The token on the left of the position is the token that strictly includes the position
-      * or sits to the left of the cursor if it is on a boundary. For example
-      *
-      *   fo|o               -> will return foo
-      *   foo <comment> |bar -> will return foo
-      *
-      */
+    function getTokenAtPosition(sourceFile: SourceFile, position: number, includeJsDocComment: boolean, includeEndPosition?: boolean): Node;
+    /**
+     * The token on the left of the position is the token that strictly includes the position
+     * or sits to the left of the cursor if it is on a boundary. For example
+     *
+     *   fo|o               -> will return foo
+     *   foo <comment> |bar -> will return foo
+     *
+     */
     function findTokenOnLeftOfPosition(file: SourceFile, position: number): Node;
     function findNextToken(previousToken: Node, parent: Node): Node;
-    function findPrecedingToken(position: number, sourceFile: SourceFile, startNode?: Node): Node;
+    function findPrecedingToken(position: number, sourceFile: SourceFile, startNode?: Node, includeJsDoc?: boolean): Node;
     function isInString(sourceFile: SourceFile, position: number): boolean;
-    function isInComment(sourceFile: SourceFile, position: number): boolean;
     /**
      * returns true if the position is in between the open and close elements of an JSX expression.
      */
     function isInsideJsxElementOrAttribute(sourceFile: SourceFile, position: number): boolean;
     function isInTemplateString(sourceFile: SourceFile, position: number): boolean;
     /**
-     * Returns true if the cursor at position in sourceFile is within a comment that additionally
-     * satisfies predicate, and false otherwise.
+     * Returns true if the cursor at position in sourceFile is within a comment.
+     *
+     * @param tokenAtPosition Must equal `getTokenAtPosition(sourceFile, position)
+     * @param predicate Additional predicate to test on the comment range.
      */
-    function isInCommentHelper(sourceFile: SourceFile, position: number, predicate?: (c: CommentRange) => boolean): boolean;
+    function isInComment(sourceFile: SourceFile, position: number, tokenAtPosition?: Node, predicate?: (c: CommentRange) => boolean): boolean;
     function hasDocComment(sourceFile: SourceFile, position: number): boolean;
-    /**
-     * Get the corresponding JSDocTag node if the position is in a jsDoc comment
-     */
-    function getJsDocTagAtPosition(sourceFile: SourceFile, position: number): JSDocTag;
     function getNodeModifiers(node: Node): string;
     function getTypeArgumentOrTypeParameterList(node: Node): NodeArray<Node>;
-    function isToken(n: Node): boolean;
     function isWord(kind: SyntaxKind): boolean;
     function isComment(kind: SyntaxKind): boolean;
     function isStringOrRegularExpressionOrTemplateLiteral(kind: SyntaxKind): boolean;
     function isPunctuation(kind: SyntaxKind): boolean;
     function isInsideTemplateLiteral(node: LiteralExpression, position: number): boolean;
     function isAccessibilityModifier(kind: SyntaxKind): boolean;
+    function cloneCompilerOptions(options: CompilerOptions): CompilerOptions;
     function compareDataObjects(dst: any, src: any): boolean;
     function isArrayLiteralOrObjectLiteralDestructuringPattern(node: Node): boolean;
     function hasTrailingDirectorySeparator(path: string): boolean;
     function isInReferenceComment(sourceFile: SourceFile, position: number): boolean;
     function isInNonReferenceComment(sourceFile: SourceFile, position: number): boolean;
+    function createTextSpanFromNode(node: Node, sourceFile?: SourceFile): TextSpan;
+    function createTextSpanFromRange(range: TextRange): TextSpan;
+    function isTypeKeyword(kind: SyntaxKind): boolean;
+    /** True if the symbol is for an external module, as opposed to a namespace. */
+    function isExternalModuleSymbol(moduleSymbol: Symbol): boolean;
+    /** Returns `true` the first time it encounters a node and `false` afterwards. */
+    function nodeSeenTracker<T extends Node>(): (node: T) => boolean;
 }
 declare namespace ts {
     function isFirstDeclarationOfSymbolParameter(symbol: Symbol): boolean;
     function symbolPart(text: string, symbol: Symbol): SymbolDisplayPart;
-    function displayPart(text: string, kind: SymbolDisplayPartKind, symbol?: Symbol): SymbolDisplayPart;
+    function displayPart(text: string, kind: SymbolDisplayPartKind): SymbolDisplayPart;
     function spacePart(): SymbolDisplayPart;
     function keywordPart(kind: SyntaxKind): SymbolDisplayPart;
     function punctuationPart(kind: SyntaxKind): SymbolDisplayPart;
@@ -9660,7 +12301,7 @@ declare namespace ts {
     function symbolToDisplayParts(typeChecker: TypeChecker, symbol: Symbol, enclosingDeclaration?: Node, meaning?: SymbolFlags, flags?: SymbolFormatFlags): SymbolDisplayPart[];
     function signatureToDisplayParts(typechecker: TypeChecker, signature: Signature, enclosingDeclaration?: Node, flags?: TypeFormatFlags): SymbolDisplayPart[];
     function getDeclaredName(typeChecker: TypeChecker, symbol: Symbol, location: Node): string;
-    function isImportOrExportSpecifierName(location: Node): boolean;
+    function isImportOrExportSpecifierName(location: Node): location is Identifier;
     /**
      * Strip off existed single quotes or double quotes from a given string
      *
@@ -9669,10 +12310,9 @@ declare namespace ts {
     function stripQuotes(name: string): string;
     function scriptKindIs(fileName: string, host: LanguageServiceHost, ...scriptKinds: ScriptKind[]): boolean;
     function getScriptKind(fileName: string, host?: LanguageServiceHost): ScriptKind;
-    function sanitizeConfigFile(configFileName: string, content: string): {
-        configJsonObject: any;
-        diagnostics: Diagnostic[];
-    };
+    function getFirstNonSpaceCharacterPosition(text: string, position: number): number;
+    function getOpenBrace(constructor: ConstructorDeclaration, sourceFile: SourceFile): Node;
+    function getOpenBraceOfClassLike(declaration: ClassLikeDeclaration, sourceFile: SourceFile): Node;
 }
 declare namespace ts {
     function createClassifier(): Classifier;
@@ -9681,71 +12321,76 @@ declare namespace ts {
     function getSyntacticClassifications(cancellationToken: CancellationToken, sourceFile: SourceFile, span: TextSpan): ClassifiedSpan[];
     function getEncodedSyntacticClassifications(cancellationToken: CancellationToken, sourceFile: SourceFile, span: TextSpan): Classifications;
 }
+declare namespace ts.Completions.PathCompletions {
+    function getStringLiteralCompletionEntriesFromModuleNames(node: StringLiteral, compilerOptions: CompilerOptions, host: LanguageServiceHost, typeChecker: TypeChecker): CompletionInfo;
+    function getTripleSlashReferenceCompletion(sourceFile: SourceFile, position: number, compilerOptions: CompilerOptions, host: LanguageServiceHost): CompletionInfo;
+}
 declare namespace ts.Completions {
-    function getCompletionsAtPosition(host: LanguageServiceHost, typeChecker: TypeChecker, log: (message: string) => void, compilerOptions: CompilerOptions, sourceFile: SourceFile, position: number): CompletionInfo;
+    type Log = (message: string) => void;
+    function getCompletionsAtPosition(host: LanguageServiceHost, typeChecker: TypeChecker, log: Log, compilerOptions: CompilerOptions, sourceFile: SourceFile, position: number): CompletionInfo | undefined;
     function getCompletionEntryDetails(typeChecker: TypeChecker, log: (message: string) => void, compilerOptions: CompilerOptions, sourceFile: SourceFile, position: number, entryName: string): CompletionEntryDetails;
     function getCompletionEntrySymbol(typeChecker: TypeChecker, log: (message: string) => void, compilerOptions: CompilerOptions, sourceFile: SourceFile, position: number, entryName: string): Symbol;
 }
 declare namespace ts.DocumentHighlights {
-    function getDocumentHighlights(typeChecker: TypeChecker, cancellationToken: CancellationToken, sourceFile: SourceFile, position: number, sourceFilesToSearch: SourceFile[]): DocumentHighlights[];
+    function getDocumentHighlights(program: Program, cancellationToken: CancellationToken, sourceFile: SourceFile, position: number, sourceFilesToSearch: SourceFile[]): DocumentHighlights[] | undefined;
 }
 declare namespace ts {
     /**
-      * The document registry represents a store of SourceFile objects that can be shared between
-      * multiple LanguageService instances. A LanguageService instance holds on the SourceFile (AST)
-      * of files in the context.
-      * SourceFile objects account for most of the memory usage by the language service. Sharing
-      * the same DocumentRegistry instance between different instances of LanguageService allow
-      * for more efficient memory utilization since all projects will share at least the library
-      * file (lib.d.ts).
-      *
-      * A more advanced use of the document registry is to serialize sourceFile objects to disk
-      * and re-hydrate them when needed.
-      *
-      * To create a default DocumentRegistry, use createDocumentRegistry to create one, and pass it
-      * to all subsequent createLanguageService calls.
-      */
+     * The document registry represents a store of SourceFile objects that can be shared between
+     * multiple LanguageService instances. A LanguageService instance holds on the SourceFile (AST)
+     * of files in the context.
+     * SourceFile objects account for most of the memory usage by the language service. Sharing
+     * the same DocumentRegistry instance between different instances of LanguageService allow
+     * for more efficient memory utilization since all projects will share at least the library
+     * file (lib.d.ts).
+     *
+     * A more advanced use of the document registry is to serialize sourceFile objects to disk
+     * and re-hydrate them when needed.
+     *
+     * To create a default DocumentRegistry, use createDocumentRegistry to create one, and pass it
+     * to all subsequent createLanguageService calls.
+     */
     interface DocumentRegistry {
         /**
-          * Request a stored SourceFile with a given fileName and compilationSettings.
-          * The first call to acquire will call createLanguageServiceSourceFile to generate
-          * the SourceFile if was not found in the registry.
-          *
-          * @param fileName The name of the file requested
-          * @param compilationSettings Some compilation settings like target affects the
-          * shape of a the resulting SourceFile. This allows the DocumentRegistry to store
-          * multiple copies of the same file for different compilation settings.
-          * @parm scriptSnapshot Text of the file. Only used if the file was not found
-          * in the registry and a new one was created.
-          * @parm version Current version of the file. Only used if the file was not found
-          * in the registry and a new one was created.
-          */
+         * Request a stored SourceFile with a given fileName and compilationSettings.
+         * The first call to acquire will call createLanguageServiceSourceFile to generate
+         * the SourceFile if was not found in the registry.
+         *
+         * @param fileName The name of the file requested
+         * @param compilationSettings Some compilation settings like target affects the
+         * shape of a the resulting SourceFile. This allows the DocumentRegistry to store
+         * multiple copies of the same file for different compilation settings.
+         * @parm scriptSnapshot Text of the file. Only used if the file was not found
+         * in the registry and a new one was created.
+         * @parm version Current version of the file. Only used if the file was not found
+         * in the registry and a new one was created.
+         */
         acquireDocument(fileName: string, compilationSettings: CompilerOptions, scriptSnapshot: IScriptSnapshot, version: string, scriptKind?: ScriptKind): SourceFile;
         acquireDocumentWithKey(fileName: string, path: Path, compilationSettings: CompilerOptions, key: DocumentRegistryBucketKey, scriptSnapshot: IScriptSnapshot, version: string, scriptKind?: ScriptKind): SourceFile;
         /**
-          * Request an updated version of an already existing SourceFile with a given fileName
-          * and compilationSettings. The update will in-turn call updateLanguageServiceSourceFile
-          * to get an updated SourceFile.
-          *
-          * @param fileName The name of the file requested
-          * @param compilationSettings Some compilation settings like target affects the
-          * shape of a the resulting SourceFile. This allows the DocumentRegistry to store
-          * multiple copies of the same file for different compilation settings.
-          * @param scriptSnapshot Text of the file.
-          * @param version Current version of the file.
-          */
+         * Request an updated version of an already existing SourceFile with a given fileName
+         * and compilationSettings. The update will in-turn call updateLanguageServiceSourceFile
+         * to get an updated SourceFile.
+         *
+         * @param fileName The name of the file requested
+         * @param compilationSettings Some compilation settings like target affects the
+         * shape of a the resulting SourceFile. This allows the DocumentRegistry to store
+         * multiple copies of the same file for different compilation settings.
+         * @param scriptSnapshot Text of the file.
+         * @param version Current version of the file.
+         */
         updateDocument(fileName: string, compilationSettings: CompilerOptions, scriptSnapshot: IScriptSnapshot, version: string, scriptKind?: ScriptKind): SourceFile;
         updateDocumentWithKey(fileName: string, path: Path, compilationSettings: CompilerOptions, key: DocumentRegistryBucketKey, scriptSnapshot: IScriptSnapshot, version: string, scriptKind?: ScriptKind): SourceFile;
         getKeyForCompilationSettings(settings: CompilerOptions): DocumentRegistryBucketKey;
         /**
-          * Informs the DocumentRegistry that a file is not needed any longer.
-          *
-          * Note: It is not allowed to call release on a SourceFile that was not acquired from
-          * this registry originally.
-          *
-          * @param fileName The name of the file to be released
-          * @param compilationSettings The compilation settings used to acquire the file
-          */
+         * Informs the DocumentRegistry that a file is not needed any longer.
+         *
+         * Note: It is not allowed to call release on a SourceFile that was not acquired from
+         * this registry originally.
+         *
+         * @param fileName The name of the file to be released
+         * @param compilationSettings The compilation settings used to acquire the file
+         */
         releaseDocument(fileName: string, compilationSettings: CompilerOptions): void;
         releaseDocumentWithKey(path: Path, key: DocumentRegistryBucketKey): void;
         reportStats(): string;
@@ -9756,22 +12401,130 @@ declare namespace ts {
     function createDocumentRegistry(useCaseSensitiveFileNames?: boolean, currentDirectory?: string): DocumentRegistry;
 }
 declare namespace ts.FindAllReferences {
-    function findReferencedSymbols(typeChecker: TypeChecker, cancellationToken: CancellationToken, sourceFiles: SourceFile[], sourceFile: SourceFile, position: number, findInStrings: boolean, findInComments: boolean): ReferencedSymbol[];
-    function getReferencedSymbolsForNode(typeChecker: TypeChecker, cancellationToken: CancellationToken, node: Node, sourceFiles: SourceFile[], findInStrings: boolean, findInComments: boolean, implementations: boolean): ReferencedSymbol[];
-    function convertReferences(referenceSymbols: ReferencedSymbol[]): ReferenceEntry[];
-    function getReferenceEntriesForShorthandPropertyAssignment(node: Node, typeChecker: TypeChecker, result: ReferenceEntry[]): void;
-    function getReferenceEntryFromNode(node: Node): ReferenceEntry;
+    interface ImportsResult {
+        /** For every import of the symbol, the location and local symbol for the import. */
+        importSearches: Array<[Identifier, Symbol]>;
+        /** For rename imports/exports `{ foo as bar }`, `foo` is not a local, so it may be added as a reference immediately without further searching. */
+        singleReferences: Identifier[];
+        /** List of source files that may (or may not) use the symbol via a namespace. (For UMD modules this is every file.) */
+        indirectUsers: SourceFile[];
+    }
+    type ImportTracker = (exportSymbol: Symbol, exportInfo: ExportInfo, isForRename: boolean) => ImportsResult;
+    /** Creates the imports map and returns an ImportTracker that uses it. Call this lazily to avoid calling `getDirectImportsMap` unnecessarily.  */
+    function createImportTracker(sourceFiles: SourceFile[], checker: TypeChecker, cancellationToken: CancellationToken): ImportTracker;
+    /** Info about an exported symbol to perform recursive search on. */
+    interface ExportInfo {
+        exportingModuleSymbol: Symbol;
+        exportKind: ExportKind;
+    }
+    enum ExportKind {
+        Named = 0,
+        Default = 1,
+        ExportEquals = 2,
+    }
+    enum ImportExport {
+        Import = 0,
+        Export = 1,
+    }
+    type ModuleReference = {
+        kind: "import";
+        literal: StringLiteral;
+    } | {
+        kind: "reference";
+        referencingFile: SourceFile;
+        ref: FileReference;
+    };
+    function findModuleReferences(program: Program, sourceFiles: SourceFile[], searchModuleSymbol: Symbol): ModuleReference[];
+    interface ImportedSymbol {
+        kind: ImportExport.Import;
+        symbol: Symbol;
+        isNamedImport: boolean;
+    }
+    interface ExportedSymbol {
+        kind: ImportExport.Export;
+        symbol: Symbol;
+        exportInfo: ExportInfo;
+    }
+    /**
+     * Given a local reference, we might notice that it's an import/export and recursively search for references of that.
+     * If at an import, look locally for the symbol it imports.
+     * If an an export, look for all imports of it.
+     * This doesn't handle export specifiers; that is done in `getReferencesAtExportSpecifier`.
+     * @param comingFromExport If we are doing a search for all exports, don't bother looking backwards for the imported symbol, since that's the reason we're here.
+     */
+    function getImportOrExportSymbol(node: Node, symbol: Symbol, checker: TypeChecker, comingFromExport: boolean): ImportedSymbol | ExportedSymbol | undefined;
+    function getExportInfo(exportSymbol: Symbol, exportKind: ExportKind, checker: TypeChecker): ExportInfo | undefined;
+}
+declare namespace ts.FindAllReferences {
+    interface SymbolAndEntries {
+        definition: Definition | undefined;
+        references: Entry[];
+    }
+    type Definition = {
+        type: "symbol";
+        symbol: Symbol;
+        node: Node;
+    } | {
+        type: "label";
+        node: Identifier;
+    } | {
+        type: "keyword";
+        node: ts.Node;
+    } | {
+        type: "this";
+        node: ts.Node;
+    } | {
+        type: "string";
+        node: ts.StringLiteral;
+    };
+    type Entry = NodeEntry | SpanEntry;
+    interface NodeEntry {
+        type: "node";
+        node: Node;
+        isInString?: true;
+    }
+    interface SpanEntry {
+        type: "span";
+        fileName: string;
+        textSpan: TextSpan;
+    }
+    function nodeEntry(node: ts.Node, isInString?: true): NodeEntry;
+    interface Options {
+        readonly findInStrings?: boolean;
+        readonly findInComments?: boolean;
+        /**
+         * True if we are renaming the symbol.
+         * If so, we will find fewer references -- if it is referenced by several different names, we sill only find references for the original name.
+         */
+        readonly isForRename?: boolean;
+        /** True if we are searching for implementations. We will have a different method of adding references if so. */
+        readonly implementations?: boolean;
+    }
+    function findReferencedSymbols(program: Program, cancellationToken: CancellationToken, sourceFiles: SourceFile[], sourceFile: SourceFile, position: number): ReferencedSymbol[] | undefined;
+    function getImplementationsAtPosition(program: Program, cancellationToken: CancellationToken, sourceFiles: SourceFile[], sourceFile: SourceFile, position: number): ImplementationLocation[];
+    function findReferencedEntries(program: Program, cancellationToken: CancellationToken, sourceFiles: SourceFile[], sourceFile: SourceFile, position: number, options?: Options): ReferenceEntry[] | undefined;
+    function getReferenceEntriesForNode(node: Node, program: Program, sourceFiles: SourceFile[], cancellationToken: CancellationToken, options?: Options): Entry[] | undefined;
+    function toHighlightSpan(entry: FindAllReferences.Entry): {
+        fileName: string;
+        span: HighlightSpan;
+    };
+}
+/** Encapsulates the core find-all-references algorithm. */
+declare namespace ts.FindAllReferences.Core {
+    /** Core find-all-references algorithm. Handles special cases before delegating to `getReferencedSymbolsForSymbol`. */
+    function getReferencedSymbolsForNode(node: Node, program: Program, sourceFiles: SourceFile[], cancellationToken: CancellationToken, options?: Options): SymbolAndEntries[] | undefined;
+    function getReferenceEntriesForShorthandPropertyAssignment(node: Node, checker: TypeChecker, addReference: (node: Node) => void): void;
 }
 declare namespace ts.GoToDefinition {
     function getDefinitionAtPosition(program: Program, sourceFile: SourceFile, position: number): DefinitionInfo[];
     function getTypeDefinitionAtPosition(typeChecker: TypeChecker, sourceFile: SourceFile, position: number): DefinitionInfo[];
 }
-declare namespace ts.GoToImplementation {
-    function getImplementationAtPosition(typeChecker: TypeChecker, cancellationToken: CancellationToken, sourceFiles: SourceFile[], node: Node): ImplementationLocation[];
-}
 declare namespace ts.JsDoc {
-    function getJsDocCommentsFromDeclarations(declarations: Declaration[], name: string, canUseParsedParamTagComments: boolean): SymbolDisplayPart[];
-    function getAllJsDocCompletionEntries(): CompletionEntry[];
+    function getJsDocCommentsFromDeclarations(declarations?: Declaration[]): SymbolDisplayPart[];
+    function getJsDocTagsFromDeclarations(declarations?: Declaration[]): JSDocTagInfo[];
+    function getJSDocTagNameCompletions(): CompletionEntry[];
+    function getJSDocTagCompletions(): CompletionEntry[];
+    function getJSDocParameterNameCompletions(tag: JSDocParameterTag): CompletionEntry[];
     /**
      * Checks if position points to a valid position to add JSDoc comments, and if so,
      * returns the appropriate template. Otherwise returns an empty string.
@@ -9801,16 +12554,17 @@ declare namespace ts.JsTyping {
         readFile: (path: string, encoding?: string) => string;
         readDirectory: (rootDir: string, extensions: string[], excludes: string[], includes: string[], depth?: number) => string[];
     }
+    const nodeCoreModuleList: ReadonlyArray<string>;
     /**
      * @param host is the object providing I/O related operations.
      * @param fileNames are the file names that belong to the same project
      * @param projectRootPath is the path to the project root directory
      * @param safeListPath is the path used to retrieve the safe list
      * @param packageNameToTypingLocation is the map of package names to their cached typing locations
-     * @param typingOptions are used to customize the typing inference process
+     * @param typeAcquisition is used to customize the typing acquisition process
      * @param compilerOptions are used as a source for typing inference
      */
-    function discoverTypings(host: TypingResolutionHost, fileNames: string[], projectRootPath: Path, safeListPath: Path, packageNameToTypingLocation: Map<string>, typingOptions: TypingOptions, compilerOptions: CompilerOptions): {
+    function discoverTypings(host: TypingResolutionHost, fileNames: string[], projectRootPath: Path, safeListPath: Path, packageNameToTypingLocation: Map<string>, typeAcquisition: TypeAcquisition, unresolvedImports: ReadonlyArray<string>): {
         cachedTypingPaths: string[];
         newTypingNames: string[];
         filesToWatch: string[];
@@ -9820,10 +12574,11 @@ declare namespace ts.NavigateTo {
     function getNavigateToItems(sourceFiles: SourceFile[], checker: TypeChecker, cancellationToken: CancellationToken, searchValue: string, maxResultCount: number, excludeDtsFiles: boolean): NavigateToItem[];
 }
 declare namespace ts.NavigationBar {
-    function getNavigationBarItems(sourceFile: SourceFile): NavigationBarItem[];
+    function getNavigationBarItems(sourceFile: SourceFile, cancellationToken: CancellationToken): NavigationBarItem[];
+    function getNavigationTree(sourceFile: SourceFile, cancellationToken: CancellationToken): NavigationTree;
 }
 declare namespace ts.OutliningElementsCollector {
-    function collectElements(sourceFile: SourceFile): OutliningSpan[];
+    function collectElements(sourceFile: SourceFile, cancellationToken: CancellationToken): OutliningSpan[];
 }
 declare namespace ts {
     enum PatternMatchKind {
@@ -9858,6 +12613,7 @@ declare namespace ts.SignatureHelp {
         TypeArguments = 0,
         CallArguments = 1,
         TaggedTemplateArguments = 2,
+        JSXAttributesArguments = 3,
     }
     interface ArgumentListInfo {
         kind: ArgumentListKind;
@@ -9867,15 +12623,21 @@ declare namespace ts.SignatureHelp {
         argumentCount: number;
     }
     function getSignatureHelpItems(program: Program, sourceFile: SourceFile, position: number, cancellationToken: CancellationToken): SignatureHelpItems;
+    /**
+     * Returns relevant information for the argument list and the current argument if we are
+     * in the argument of an invocation; returns undefined otherwise.
+     */
+    function getImmediatelyContainingArgumentInfo(node: Node, position: number, sourceFile: SourceFile): ArgumentListInfo;
     function getContainingArgumentInfo(node: Node, position: number, sourceFile: SourceFile): ArgumentListInfo;
 }
 declare namespace ts.SymbolDisplay {
-    function getSymbolKind(typeChecker: TypeChecker, symbol: Symbol, location: Node): string;
+    function getSymbolKind(typeChecker: TypeChecker, symbol: Symbol, location: Node): ScriptElementKind;
     function getSymbolModifiers(symbol: Symbol): string;
     function getSymbolDisplayPartsDocumentationAndSymbolKind(typeChecker: TypeChecker, symbol: Symbol, sourceFile: SourceFile, enclosingDeclaration: Node, location: Node, semanticMeaning?: SemanticMeaning): {
         displayParts: SymbolDisplayPart[];
         documentation: SymbolDisplayPart[];
-        symbolKind: string;
+        symbolKind: ScriptElementKind;
+        tags: JSDocTagInfo[];
     };
 }
 declare namespace ts {
@@ -9885,6 +12647,7 @@ declare namespace ts {
         reportDiagnostics?: boolean;
         moduleName?: string;
         renamedDependencies?: MapLike<string>;
+        transformers?: CustomTransformers;
     }
     interface TranspileOutput {
         outputText: string;
@@ -9893,6 +12656,8 @@ declare namespace ts {
     }
     function transpileModule(input: string, transpileOptions: TranspileOptions): TranspileOutput;
     function transpile(input: string, compilerOptions?: CompilerOptions, fileName?: string, diagnostics?: Diagnostic[], moduleName?: string): string;
+    /** JS users may pass in string values for enum compiler options (such as ModuleKind), so convert. */
+    function fixupCompilerOptions(options: CompilerOptions, diagnostics: Diagnostic[]): CompilerOptions;
 }
 declare namespace ts.formatting {
     interface FormattingScanner {
@@ -9904,12 +12669,13 @@ declare namespace ts.formatting {
         skipToEndOf(node: Node): void;
         close(): void;
     }
-    function getFormattingScanner(sourceFile: SourceFile, startPos: number, endPos: number): FormattingScanner;
+    function getFormattingScanner(text: string, languageVariant: LanguageVariant, startPos: number, endPos: number): FormattingScanner;
 }
 declare namespace ts.formatting {
     class FormattingContext {
-        sourceFile: SourceFile;
+        readonly sourceFile: SourceFileLike;
         formattingRequestKind: FormattingRequestKind;
+        options: ts.FormatCodeSettings;
         currentTokenSpan: TextRangeWithKind;
         nextTokenSpan: TextRangeWithKind;
         contextNode: Node;
@@ -9920,7 +12686,7 @@ declare namespace ts.formatting {
         private tokensAreOnSameLine;
         private contextNodeBlockIsOnOneLine;
         private nextNodeBlockIsOnOneLine;
-        constructor(sourceFile: SourceFile, formattingRequestKind: FormattingRequestKind);
+        constructor(sourceFile: SourceFileLike, formattingRequestKind: FormattingRequestKind, options: ts.FormatCodeSettings);
         updateContext(currentRange: TextRangeWithKind, currentTokenParent: Node, nextRange: TextRangeWithKind, nextTokenParent: Node, commonParent: Node): void;
         ContextNodeAllOnSameLine(): boolean;
         NextNodeAllOnSameLine(): boolean;
@@ -10037,9 +12803,11 @@ declare namespace ts.formatting {
         SpaceAfterSubtractWhenFollowedByPredecrement: Rule;
         NoSpaceBeforeComma: Rule;
         SpaceAfterCertainKeywords: Rule;
+        NoSpaceAfterNewKeywordOnConstructorSignature: Rule;
         SpaceAfterLetConstInVariableDeclaration: Rule;
         NoSpaceBeforeOpenParenInFuncCall: Rule;
         SpaceAfterFunctionInFuncDecl: Rule;
+        SpaceBeforeOpenParenInFuncDecl: Rule;
         NoSpaceBeforeOpenParenInFuncDecl: Rule;
         SpaceAfterVoidOperator: Rule;
         NoSpaceBetweenReturnAndSemicolon: Rule;
@@ -10048,6 +12816,7 @@ declare namespace ts.formatting {
         SpaceAfterGetSetInMember: Rule;
         SpaceBeforeBinaryKeywordOperator: Rule;
         SpaceAfterBinaryKeywordOperator: Rule;
+        SpaceAfterConstructor: Rule;
         NoSpaceAfterConstructor: Rule;
         NoSpaceAfterModuleImport: Rule;
         SpaceAfterCertainTypeScriptKeywords: Rule;
@@ -10064,6 +12833,7 @@ declare namespace ts.formatting {
         NoSpaceAfterCloseAngularBracket: Rule;
         NoSpaceBetweenEmptyInterfaceBraceBrackets: Rule;
         HighPriorityCommonRules: Rule[];
+        UserConfigurableRules: Rule[];
         LowPriorityCommonRules: Rule[];
         SpaceAfterComma: Rule;
         NoSpaceAfterComma: Rule;
@@ -10121,13 +12891,19 @@ declare namespace ts.formatting {
         NoSpaceAfterEqualInJsxAttribute: Rule;
         NoSpaceAfterTypeAssertion: Rule;
         SpaceAfterTypeAssertion: Rule;
+        NoSpaceBeforeNonNullAssertionOperator: Rule;
         constructor();
+        static IsOptionEnabled(optionName: keyof FormatCodeSettings): (context: FormattingContext) => boolean;
+        static IsOptionDisabled(optionName: keyof FormatCodeSettings): (context: FormattingContext) => boolean;
+        static IsOptionDisabledOrUndefined(optionName: keyof FormatCodeSettings): (context: FormattingContext) => boolean;
+        static IsOptionEnabledOrUndefined(optionName: keyof FormatCodeSettings): (context: FormattingContext) => boolean;
         static IsForContext(context: FormattingContext): boolean;
         static IsNotForContext(context: FormattingContext): boolean;
         static IsBinaryOpContext(context: FormattingContext): boolean;
         static IsNotBinaryOpContext(context: FormattingContext): boolean;
         static IsConditionalOperatorContext(context: FormattingContext): boolean;
         static IsSameLineTokenOrBeforeMultilineBlockContext(context: FormattingContext): boolean;
+        static IsBraceWrappedContext(context: FormattingContext): boolean;
         static IsBeforeMultilineBlockContext(context: FormattingContext): boolean;
         static IsMultilineBlockContext(context: FormattingContext): boolean;
         static IsSingleLineBlockContext(context: FormattingContext): boolean;
@@ -10160,11 +12936,13 @@ declare namespace ts.formatting {
         static IsNotFormatOnEnter(context: FormattingContext): boolean;
         static IsModuleDeclContext(context: FormattingContext): boolean;
         static IsObjectTypeContext(context: FormattingContext): boolean;
+        static IsConstructorSignatureContext(context: FormattingContext): boolean;
         static IsTypeArgumentOrParameterOrAssertion(token: TextRangeWithKind, parent: Node): boolean;
         static IsTypeArgumentOrParameterOrAssertionContext(context: FormattingContext): boolean;
         static IsTypeAssertionContext(context: FormattingContext): boolean;
         static IsVoidOpContext(context: FormattingContext): boolean;
         static IsYieldOrYieldStarWithOperand(context: FormattingContext): boolean;
+        static IsNonNullAssertionContext(context: FormattingContext): boolean;
     }
 }
 declare namespace ts.formatting {
@@ -10202,56 +12980,29 @@ declare namespace ts.formatting {
 }
 declare namespace ts.formatting {
     namespace Shared {
-        interface ITokenAccess {
-            GetTokens(): SyntaxKind[];
-            Contains(token: SyntaxKind): boolean;
-        }
-        class TokenRangeAccess implements ITokenAccess {
-            private tokens;
-            constructor(from: SyntaxKind, to: SyntaxKind, except: SyntaxKind[]);
-            GetTokens(): SyntaxKind[];
-            Contains(token: SyntaxKind): boolean;
-        }
-        class TokenValuesAccess implements ITokenAccess {
-            private tokens;
-            constructor(tks: SyntaxKind[]);
+        interface TokenRange {
             GetTokens(): SyntaxKind[];
             Contains(token: SyntaxKind): boolean;
+            isSpecific(): boolean;
         }
-        class TokenSingleValueAccess implements ITokenAccess {
-            token: SyntaxKind;
-            constructor(token: SyntaxKind);
-            GetTokens(): SyntaxKind[];
-            Contains(tokenValue: SyntaxKind): boolean;
-        }
-        class TokenAllAccess implements ITokenAccess {
-            GetTokens(): SyntaxKind[];
-            Contains(tokenValue: SyntaxKind): boolean;
-            toString(): string;
-        }
-        class TokenRange {
-            tokenAccess: ITokenAccess;
-            constructor(tokenAccess: ITokenAccess);
-            static FromToken(token: SyntaxKind): TokenRange;
-            static FromTokens(tokens: SyntaxKind[]): TokenRange;
-            static FromRange(f: SyntaxKind, to: SyntaxKind, except?: SyntaxKind[]): TokenRange;
-            static AllTokens(): TokenRange;
-            GetTokens(): SyntaxKind[];
-            Contains(token: SyntaxKind): boolean;
-            toString(): string;
-            static Any: TokenRange;
-            static AnyIncludingMultilineComments: TokenRange;
-            static Keywords: TokenRange;
-            static BinaryOperators: TokenRange;
-            static BinaryKeywordOperators: TokenRange;
-            static UnaryPrefixOperators: TokenRange;
-            static UnaryPrefixExpressions: TokenRange;
-            static UnaryPreincrementExpressions: TokenRange;
-            static UnaryPostincrementExpressions: TokenRange;
-            static UnaryPredecrementExpressions: TokenRange;
-            static UnaryPostdecrementExpressions: TokenRange;
-            static Comments: TokenRange;
-            static TypeNames: TokenRange;
+        namespace TokenRange {
+            function FromToken(token: SyntaxKind): TokenRange;
+            function FromTokens(tokens: SyntaxKind[]): TokenRange;
+            function FromRange(from: SyntaxKind, to: SyntaxKind, except?: SyntaxKind[]): TokenRange;
+            function AnyExcept(token: SyntaxKind): TokenRange;
+            const Any: TokenRange;
+            const AnyIncludingMultilineComments: TokenRange;
+            const Keywords: TokenRange;
+            const BinaryOperators: TokenRange;
+            const BinaryKeywordOperators: TokenRange;
+            const UnaryPrefixOperators: TokenRange;
+            const UnaryPrefixExpressions: TokenRange;
+            const UnaryPreincrementExpressions: TokenRange;
+            const UnaryPostincrementExpressions: TokenRange;
+            const UnaryPredecrementExpressions: TokenRange;
+            const UnaryPostdecrementExpressions: TokenRange;
+            const Comments: TokenRange;
+            const TypeNames: TokenRange;
         }
     }
 }
@@ -10259,14 +13010,13 @@ declare namespace ts.formatting {
     class RulesProvider {
         private globalRules;
         private options;
-        private activeRules;
         private rulesMap;
         constructor();
         getRuleName(rule: Rule): string;
         getRuleByName(name: string): Rule;
         getRulesMap(): RulesMap;
+        getFormatOptions(): Readonly<ts.FormatCodeSettings>;
         ensureUpToDate(options: ts.FormatCodeSettings): void;
-        private createActiveRules(options);
     }
 }
 declare namespace ts.formatting {
@@ -10283,23 +13033,206 @@ declare namespace ts.formatting {
     function formatOnClosingCurly(position: number, sourceFile: SourceFile, rulesProvider: RulesProvider, options: FormatCodeSettings): TextChange[];
     function formatDocument(sourceFile: SourceFile, rulesProvider: RulesProvider, options: FormatCodeSettings): TextChange[];
     function formatSelection(start: number, end: number, sourceFile: SourceFile, rulesProvider: RulesProvider, options: FormatCodeSettings): TextChange[];
+    function formatNode(node: Node, sourceFileLike: SourceFileLike, languageVariant: LanguageVariant, initialIndentation: number, delta: number, rulesProvider: RulesProvider): TextChange[];
     function getIndentationString(indentation: number, options: EditorSettings): string;
 }
 declare namespace ts.formatting {
     namespace SmartIndenter {
-        function getIndentation(position: number, sourceFile: SourceFile, options: EditorSettings): number;
+        /**
+         * Computed indentation for a given position in source file
+         * @param position - position in file
+         * @param sourceFile - target source file
+         * @param options - set of editor options that control indentation
+         * @param assumeNewLineBeforeCloseBrace - false when getIndentation is called on the text from the real source file.
+         * true - when we need to assume that position is on the newline. This is usefult for codefixes, i.e.
+         * function f() {
+         * |}
+         * when inserting some text after open brace we would like to get the value of indentation as if newline was already there.
+         * However by default indentation at position | will be 0 so 'assumeNewLineBeforeCloseBrace' allows to override this behavior,
+         */
+        function getIndentation(position: number, sourceFile: SourceFile, options: EditorSettings, assumeNewLineBeforeCloseBrace?: boolean): number;
         function getIndentationForNode(n: Node, ignoreActualIndentationRange: TextRange, sourceFile: SourceFile, options: EditorSettings): number;
         function getBaseIndentation(options: EditorSettings): number;
-        function childStartsOnTheSameLineWithElseInIfStatement(parent: Node, child: TextRangeWithKind, childStartLine: number, sourceFile: SourceFile): boolean;
-        function findFirstNonWhitespaceCharacterAndColumn(startPos: number, endPos: number, sourceFile: SourceFile, options: EditorSettings): {
+        function childStartsOnTheSameLineWithElseInIfStatement(parent: Node, child: TextRangeWithKind, childStartLine: number, sourceFile: SourceFileLike): boolean;
+        function getContainingList(node: Node, sourceFile: SourceFile): NodeArray<Node>;
+        function findFirstNonWhitespaceCharacterAndColumn(startPos: number, endPos: number, sourceFile: SourceFileLike, options: EditorSettings): {
             column: number;
             character: number;
         };
-        function findFirstNonWhitespaceColumn(startPos: number, endPos: number, sourceFile: SourceFile, options: EditorSettings): number;
+        function findFirstNonWhitespaceColumn(startPos: number, endPos: number, sourceFile: SourceFileLike, options: EditorSettings): number;
         function nodeWillIndentChild(parent: TextRangeWithKind, child: TextRangeWithKind, indentByDefault: boolean): boolean;
         function shouldIndentChildNode(parent: TextRangeWithKind, child?: TextRangeWithKind): boolean;
     }
 }
+declare namespace ts.textChanges {
+    interface ConfigurableStart {
+        useNonAdjustedStartPosition?: boolean;
+    }
+    interface ConfigurableEnd {
+        useNonAdjustedEndPosition?: boolean;
+    }
+    enum Position {
+        FullStart = 0,
+        Start = 1,
+    }
+    /**
+     * Usually node.pos points to a position immediately after the previous token.
+     * If this position is used as a beginning of the span to remove - it might lead to removing the trailing trivia of the previous node, i.e:
+     * const x; // this is x
+     *        ^ - pos for the next variable declaration will point here
+     * const y; // this is y
+     *        ^ - end for previous variable declaration
+     * Usually leading trivia of the variable declaration 'y' should not include trailing trivia (whitespace, comment 'this is x' and newline) from the preceding
+     * variable declaration and trailing trivia for 'y' should include (whitespace, comment 'this is y', newline).
+     * By default when removing nodes we adjust start and end positions to respect specification of the trivia above.
+     * If pos\end should be interpreted literally 'useNonAdjustedStartPosition' or 'useNonAdjustedEndPosition' should be set to true
+     */
+    type ConfigurableStartEnd = ConfigurableStart & ConfigurableEnd;
+    interface InsertNodeOptions {
+        /**
+         * Text to be inserted before the new node
+         */
+        prefix?: string;
+        /**
+         * Text to be inserted after the new node
+         */
+        suffix?: string;
+        /**
+         * Text of inserted node will be formatted with this indentation, otherwise indentation will be inferred from the old node
+         */
+        indentation?: number;
+        /**
+         * Text of inserted node will be formatted with this delta, otherwise delta will be inferred from the new node kind
+         */
+        delta?: number;
+    }
+    type ChangeNodeOptions = ConfigurableStartEnd & InsertNodeOptions;
+    function getSeparatorCharacter(separator: Token<SyntaxKind.CommaToken | SyntaxKind.SemicolonToken>): string;
+    function getAdjustedStartPosition(sourceFile: SourceFile, node: Node, options: ConfigurableStart, position: Position): number;
+    function getAdjustedEndPosition(sourceFile: SourceFile, node: Node, options: ConfigurableEnd): number;
+    class ChangeTracker {
+        private readonly newLine;
+        private readonly rulesProvider;
+        private readonly validator;
+        private changes;
+        private readonly newLineCharacter;
+        static fromCodeFixContext(context: {
+            newLineCharacter: string;
+            rulesProvider: formatting.RulesProvider;
+        }): ChangeTracker;
+        constructor(newLine: NewLineKind, rulesProvider: formatting.RulesProvider, validator?: (text: NonFormattedText) => void);
+        deleteNode(sourceFile: SourceFile, node: Node, options?: ConfigurableStartEnd): this;
+        deleteRange(sourceFile: SourceFile, range: TextRange): this;
+        deleteNodeRange(sourceFile: SourceFile, startNode: Node, endNode: Node, options?: ConfigurableStartEnd): this;
+        deleteNodeInList(sourceFile: SourceFile, node: Node): this;
+        replaceRange(sourceFile: SourceFile, range: TextRange, newNode: Node, options?: InsertNodeOptions): this;
+        replaceNode(sourceFile: SourceFile, oldNode: Node, newNode: Node, options?: ChangeNodeOptions): this;
+        replaceNodeRange(sourceFile: SourceFile, startNode: Node, endNode: Node, newNode: Node, options?: ChangeNodeOptions): this;
+        insertNodeAt(sourceFile: SourceFile, pos: number, newNode: Node, options?: InsertNodeOptions): this;
+        insertNodeBefore(sourceFile: SourceFile, before: Node, newNode: Node, options?: InsertNodeOptions & ConfigurableStart): this;
+        insertNodeAfter(sourceFile: SourceFile, after: Node, newNode: Node, options?: InsertNodeOptions & ConfigurableEnd): this;
+        /**
+         * This function should be used to insert nodes in lists when nodes don't carry separators as the part of the node range,
+         * i.e. arguments in arguments lists, parameters in parameter lists etc.
+         * Note that separators are part of the node in statements and class elements.
+         */
+        insertNodeInListAfter(sourceFile: SourceFile, after: Node, newNode: Node): this;
+        getChanges(): FileTextChanges[];
+        private computeSpan(change, _sourceFile);
+        private computeNewText(change, sourceFile);
+        private static normalize(changes);
+    }
+    interface NonFormattedText {
+        readonly text: string;
+        readonly node: Node;
+    }
+    function getNonformattedText(node: Node, sourceFile: SourceFile | undefined, newLine: NewLineKind): NonFormattedText;
+    function applyFormatting(nonFormattedText: NonFormattedText, sourceFile: SourceFile, initialIndentation: number, delta: number, rulesProvider: formatting.RulesProvider): string;
+    function applyChanges(text: string, changes: TextChange[]): string;
+}
+declare namespace ts {
+    interface CodeFix {
+        errorCodes: number[];
+        getCodeActions(context: CodeFixContext): CodeAction[] | undefined;
+    }
+    interface CodeFixContext {
+        errorCode: number;
+        sourceFile: SourceFile;
+        span: TextSpan;
+        program: Program;
+        newLineCharacter: string;
+        host: LanguageServiceHost;
+        cancellationToken: CancellationToken;
+        rulesProvider: formatting.RulesProvider;
+    }
+    namespace codefix {
+        function registerCodeFix(codeFix: CodeFix): void;
+        function getSupportedErrorCodes(): string[];
+        function getFixes(context: CodeFixContext): CodeAction[];
+    }
+}
+declare namespace ts {
+    interface Refactor {
+        /** An unique code associated with each refactor */
+        name: string;
+        /** Description of the refactor to display in the UI of the editor */
+        description: string;
+        /** Compute the associated code actions */
+        getEditsForAction(context: RefactorContext, actionName: string): RefactorEditInfo | undefined;
+        /** Compute (quickly) which actions are available here */
+        getAvailableActions(context: RefactorContext): ApplicableRefactorInfo[] | undefined;
+    }
+    interface RefactorContext {
+        file: SourceFile;
+        startPosition: number;
+        endPosition?: number;
+        program: Program;
+        newLineCharacter: string;
+        rulesProvider?: formatting.RulesProvider;
+        cancellationToken?: CancellationToken;
+    }
+    namespace refactor {
+        function registerRefactor(refactor: Refactor): void;
+        function getApplicableRefactors(context: RefactorContext): ApplicableRefactorInfo[] | undefined;
+        function getEditsForRefactor(context: RefactorContext, refactorName: string, actionName: string): RefactorEditInfo | undefined;
+    }
+}
+declare namespace ts.codefix {
+}
+declare namespace ts.codefix {
+}
+declare namespace ts.codefix {
+}
+declare namespace ts.codefix {
+}
+declare namespace ts.codefix {
+}
+declare namespace ts.codefix {
+}
+declare namespace ts.codefix {
+}
+declare namespace ts.codefix {
+}
+declare namespace ts.codefix {
+}
+declare namespace ts.codefix {
+}
+declare namespace ts.codefix {
+}
+declare namespace ts.codefix {
+    function newNodesToChanges(newNodes: Node[], insertAfter: Node, context: CodeFixContext): FileTextChanges[];
+    /**
+     * Finds members of the resolved type that are missing in the class pointed to by class decl
+     * and generates source code for the missing members.
+     * @param possiblyMissingSymbols The collection of symbols to filter and then get insertions for.
+     * @returns Empty string iff there are no member insertions.
+     */
+    function createMissingMemberNodes(classDeclaration: ClassLikeDeclaration, possiblyMissingSymbols: Symbol[], checker: TypeChecker): Node[];
+    function createMethodFromCallExpression(callExpression: CallExpression, methodName: string, includeTypeScriptSyntax: boolean, makeStatic: boolean): MethodDeclaration;
+    function createStubbedMethod(modifiers: Modifier[], name: PropertyName, optional: boolean, typeParameters: TypeParameterDeclaration[] | undefined, parameters: ParameterDeclaration[], returnType: TypeNode | undefined): MethodDeclaration;
+}
+declare namespace ts.refactor {
+}
 declare namespace ts {
     /** The version of the language service API */
     const servicesVersion = "0.5";
@@ -10310,16 +13243,32 @@ declare namespace ts {
     function toEditorSettings(options: EditorOptions | EditorSettings): EditorSettings;
     function displayPartsToString(displayParts: SymbolDisplayPart[]): string;
     function getDefaultCompilerOptions(): CompilerOptions;
+    function getSupportedCodeFixes(): string[];
     function createLanguageServiceSourceFile(fileName: string, scriptSnapshot: IScriptSnapshot, scriptTarget: ScriptTarget, version: string, setNodeParents: boolean, scriptKind?: ScriptKind): SourceFile;
     let disableIncrementalParsing: boolean;
     function updateLanguageServiceSourceFile(sourceFile: SourceFile, scriptSnapshot: IScriptSnapshot, version: string, textChangeRange: TextChangeRange, aggressiveChecks?: boolean): SourceFile;
+    /** A cancellation that throttles calls to the host */
+    class ThrottledCancellationToken implements CancellationToken {
+        private hostCancellationToken;
+        private readonly throttleWaitMilliseconds;
+        private lastCancellationCheckTime;
+        constructor(hostCancellationToken: HostCancellationToken, throttleWaitMilliseconds?: number);
+        isCancellationRequested(): boolean;
+        throwIfCancellationRequested(): void;
+    }
     function createLanguageService(host: LanguageServiceHost, documentRegistry?: DocumentRegistry): LanguageService;
+    /** Names in the name table are escaped, so an identifier `__foo` will have a name table entry `___foo`. */
     function getNameTable(sourceFile: SourceFile): Map<number>;
     /**
-      * Get the path of the default library files (lib.d.ts) as distributed with the typescript
-      * node package.
-      * The functionality is not supported if the ts module is consumed outside of a node module.
-      */
+     * Returns the containing object literal property declaration given a possible name node, e.g. "a" in x = { "a": 1 }
+     */
+    function getContainingObjectLiteralElement(node: Node): ObjectLiteralElement;
+    function getPropertySymbolsFromContextualType(typeChecker: TypeChecker, node: ObjectLiteralElement): Symbol[];
+    /**
+     * Get the path of the default library files (lib.d.ts) as distributed with the typescript
+     * node package.
+     * The functionality is not supported if the ts module is consumed outside of a node module.
+     */
     function getDefaultLibFilePath(options: CompilerOptions): string;
 }
 declare namespace ts.BreakpointResolver {
@@ -10341,7 +13290,7 @@ declare namespace ts {
          *
          * Or undefined value if there was no change.
          */
-        getChangeRange(oldSnapshot: ScriptSnapshotShim): string;
+        getChangeRange(oldSnapshot: ScriptSnapshotShim): string | undefined;
         /** Releases all resources held by this script snapshot */
         dispose?(): void;
     }
@@ -10350,7 +13299,7 @@ declare namespace ts {
         trace(s: string): void;
         error(s: string): void;
     }
-    /** Public interface of the host of a language service shim instance.*/
+    /** Public interface of the host of a language service shim instance. */
     interface LanguageServiceShimHost extends Logger {
         getCompilationSettings(): string;
         /** Returns a JSON-encoded value of the type: string[] */
@@ -10406,11 +13355,11 @@ declare namespace ts {
         unregisterShim(shim: Shim): void;
     }
     interface Shim {
-        dispose(dummy: any): void;
+        dispose(_dummy: any): void;
     }
     interface LanguageServiceShim extends Shim {
         languageService: LanguageService;
-        dispose(dummy: any): void;
+        dispose(_dummy: any): void;
         refresh(throwOnError: boolean): void;
         cleanupSemanticCache(): void;
         getSyntacticDiagnostics(fileName: string): string;
@@ -10489,6 +13438,8 @@ declare namespace ts {
          * { text: string; kind: string; kindModifiers: string; bolded: boolean; grayed: boolean; indent: number; spans: { start: number; length: number; }[]; childItems: <recursive use of this type>[] } [] = [];
          */
         getNavigationBarItems(fileName: string): string;
+        /** Returns a JSON-encoded value of the type ts.NavigationTree. */
+        getNavigationTree(fileName: string): string;
         /**
          * Returns a JSON-encoded value of the type:
          * { textSpan: { start: number, length: number }; hintSpan: { start: number, length: number }; bannerText: string; autoCollapse: boolean } [] = [];
@@ -10529,7 +13480,7 @@ declare namespace ts {
         private files;
         private loggingEnabled;
         private tracingEnabled;
-        resolveModuleNames: (moduleName: string[], containingFile: string) => ResolvedModule[];
+        resolveModuleNames: (moduleName: string[], containingFile: string) => ResolvedModuleFull[];
         resolveTypeReferenceDirectives: (typeDirectiveNames: string[], containingFile: string) => ResolvedTypeReferenceDirective[];
         directoryExists: (directoryName: string) => boolean;
         constructor(shimHost: LanguageServiceShimHost);
@@ -10587,7 +13538,7 @@ declare namespace ts {
 declare namespace TypeScript.Services {
     const TypeScriptServicesFactory: typeof ts.TypeScriptServicesFactory;
 }
-declare const toolsVersion = "2.1";
+declare const toolsVersion = "2.5";
 /**
  * Sample: add a new utility function
  */
diff --git a/bin/ntypescript.js b/bin/ntypescript.js
index d1faf83..4d6d3f0 100644
--- a/bin/ntypescript.js
+++ b/bin/ntypescript.js
@@ -1,12 +1,26 @@
-var __extends = (this && this.__extends) || function (d, b) {
-    for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
-    function __() { this.constructor = d; }
-    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+var __assign = (this && this.__assign) || Object.assign || function(t) {
+    for (var s, i = 1, n = arguments.length; i < n; i++) {
+        s = arguments[i];
+        for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
+            t[p] = s[p];
+    }
+    return t;
 };
+var __extends = (this && this.__extends) || (function () {
+    var extendStatics = Object.setPrototypeOf ||
+        ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
+        function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
+    return function (d, b) {
+        extendStatics(d, b);
+        function __() { this.constructor = d; }
+        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+    };
+})();
 var ts;
 (function (ts) {
     // token > SyntaxKind.Identifer => token is a keyword
     // Also, If you add a new SyntaxKind be sure to keep the `Markers` section at the bottom in sync
+    var SyntaxKind;
     (function (SyntaxKind) {
         SyntaxKind[SyntaxKind["Unknown"] = 0] = "Unknown";
         SyntaxKind[SyntaxKind["EndOfFileToken"] = 1] = "EndOfFileToken";
@@ -22,346 +36,358 @@ var ts;
         // Literals
         SyntaxKind[SyntaxKind["NumericLiteral"] = 8] = "NumericLiteral";
         SyntaxKind[SyntaxKind["StringLiteral"] = 9] = "StringLiteral";
-        SyntaxKind[SyntaxKind["RegularExpressionLiteral"] = 10] = "RegularExpressionLiteral";
-        SyntaxKind[SyntaxKind["NoSubstitutionTemplateLiteral"] = 11] = "NoSubstitutionTemplateLiteral";
+        SyntaxKind[SyntaxKind["JsxText"] = 10] = "JsxText";
+        SyntaxKind[SyntaxKind["JsxTextAllWhiteSpaces"] = 11] = "JsxTextAllWhiteSpaces";
+        SyntaxKind[SyntaxKind["RegularExpressionLiteral"] = 12] = "RegularExpressionLiteral";
+        SyntaxKind[SyntaxKind["NoSubstitutionTemplateLiteral"] = 13] = "NoSubstitutionTemplateLiteral";
         // Pseudo-literals
-        SyntaxKind[SyntaxKind["TemplateHead"] = 12] = "TemplateHead";
-        SyntaxKind[SyntaxKind["TemplateMiddle"] = 13] = "TemplateMiddle";
-        SyntaxKind[SyntaxKind["TemplateTail"] = 14] = "TemplateTail";
+        SyntaxKind[SyntaxKind["TemplateHead"] = 14] = "TemplateHead";
+        SyntaxKind[SyntaxKind["TemplateMiddle"] = 15] = "TemplateMiddle";
+        SyntaxKind[SyntaxKind["TemplateTail"] = 16] = "TemplateTail";
         // Punctuation
-        SyntaxKind[SyntaxKind["OpenBraceToken"] = 15] = "OpenBraceToken";
-        SyntaxKind[SyntaxKind["CloseBraceToken"] = 16] = "CloseBraceToken";
-        SyntaxKind[SyntaxKind["OpenParenToken"] = 17] = "OpenParenToken";
-        SyntaxKind[SyntaxKind["CloseParenToken"] = 18] = "CloseParenToken";
-        SyntaxKind[SyntaxKind["OpenBracketToken"] = 19] = "OpenBracketToken";
-        SyntaxKind[SyntaxKind["CloseBracketToken"] = 20] = "CloseBracketToken";
-        SyntaxKind[SyntaxKind["DotToken"] = 21] = "DotToken";
-        SyntaxKind[SyntaxKind["DotDotDotToken"] = 22] = "DotDotDotToken";
-        SyntaxKind[SyntaxKind["SemicolonToken"] = 23] = "SemicolonToken";
-        SyntaxKind[SyntaxKind["CommaToken"] = 24] = "CommaToken";
-        SyntaxKind[SyntaxKind["LessThanToken"] = 25] = "LessThanToken";
-        SyntaxKind[SyntaxKind["LessThanSlashToken"] = 26] = "LessThanSlashToken";
-        SyntaxKind[SyntaxKind["GreaterThanToken"] = 27] = "GreaterThanToken";
-        SyntaxKind[SyntaxKind["LessThanEqualsToken"] = 28] = "LessThanEqualsToken";
-        SyntaxKind[SyntaxKind["GreaterThanEqualsToken"] = 29] = "GreaterThanEqualsToken";
-        SyntaxKind[SyntaxKind["EqualsEqualsToken"] = 30] = "EqualsEqualsToken";
-        SyntaxKind[SyntaxKind["ExclamationEqualsToken"] = 31] = "ExclamationEqualsToken";
-        SyntaxKind[SyntaxKind["EqualsEqualsEqualsToken"] = 32] = "EqualsEqualsEqualsToken";
-        SyntaxKind[SyntaxKind["ExclamationEqualsEqualsToken"] = 33] = "ExclamationEqualsEqualsToken";
-        SyntaxKind[SyntaxKind["EqualsGreaterThanToken"] = 34] = "EqualsGreaterThanToken";
-        SyntaxKind[SyntaxKind["PlusToken"] = 35] = "PlusToken";
-        SyntaxKind[SyntaxKind["MinusToken"] = 36] = "MinusToken";
-        SyntaxKind[SyntaxKind["AsteriskToken"] = 37] = "AsteriskToken";
-        SyntaxKind[SyntaxKind["AsteriskAsteriskToken"] = 38] = "AsteriskAsteriskToken";
-        SyntaxKind[SyntaxKind["SlashToken"] = 39] = "SlashToken";
-        SyntaxKind[SyntaxKind["PercentToken"] = 40] = "PercentToken";
-        SyntaxKind[SyntaxKind["PlusPlusToken"] = 41] = "PlusPlusToken";
-        SyntaxKind[SyntaxKind["MinusMinusToken"] = 42] = "MinusMinusToken";
-        SyntaxKind[SyntaxKind["LessThanLessThanToken"] = 43] = "LessThanLessThanToken";
-        SyntaxKind[SyntaxKind["GreaterThanGreaterThanToken"] = 44] = "GreaterThanGreaterThanToken";
-        SyntaxKind[SyntaxKind["GreaterThanGreaterThanGreaterThanToken"] = 45] = "GreaterThanGreaterThanGreaterThanToken";
-        SyntaxKind[SyntaxKind["AmpersandToken"] = 46] = "AmpersandToken";
-        SyntaxKind[SyntaxKind["BarToken"] = 47] = "BarToken";
-        SyntaxKind[SyntaxKind["CaretToken"] = 48] = "CaretToken";
-        SyntaxKind[SyntaxKind["ExclamationToken"] = 49] = "ExclamationToken";
-        SyntaxKind[SyntaxKind["TildeToken"] = 50] = "TildeToken";
-        SyntaxKind[SyntaxKind["AmpersandAmpersandToken"] = 51] = "AmpersandAmpersandToken";
-        SyntaxKind[SyntaxKind["BarBarToken"] = 52] = "BarBarToken";
-        SyntaxKind[SyntaxKind["QuestionToken"] = 53] = "QuestionToken";
-        SyntaxKind[SyntaxKind["ColonToken"] = 54] = "ColonToken";
-        SyntaxKind[SyntaxKind["AtToken"] = 55] = "AtToken";
+        SyntaxKind[SyntaxKind["OpenBraceToken"] = 17] = "OpenBraceToken";
+        SyntaxKind[SyntaxKind["CloseBraceToken"] = 18] = "CloseBraceToken";
+        SyntaxKind[SyntaxKind["OpenParenToken"] = 19] = "OpenParenToken";
+        SyntaxKind[SyntaxKind["CloseParenToken"] = 20] = "CloseParenToken";
+        SyntaxKind[SyntaxKind["OpenBracketToken"] = 21] = "OpenBracketToken";
+        SyntaxKind[SyntaxKind["CloseBracketToken"] = 22] = "CloseBracketToken";
+        SyntaxKind[SyntaxKind["DotToken"] = 23] = "DotToken";
+        SyntaxKind[SyntaxKind["DotDotDotToken"] = 24] = "DotDotDotToken";
+        SyntaxKind[SyntaxKind["SemicolonToken"] = 25] = "SemicolonToken";
+        SyntaxKind[SyntaxKind["CommaToken"] = 26] = "CommaToken";
+        SyntaxKind[SyntaxKind["LessThanToken"] = 27] = "LessThanToken";
+        SyntaxKind[SyntaxKind["LessThanSlashToken"] = 28] = "LessThanSlashToken";
+        SyntaxKind[SyntaxKind["GreaterThanToken"] = 29] = "GreaterThanToken";
+        SyntaxKind[SyntaxKind["LessThanEqualsToken"] = 30] = "LessThanEqualsToken";
+        SyntaxKind[SyntaxKind["GreaterThanEqualsToken"] = 31] = "GreaterThanEqualsToken";
+        SyntaxKind[SyntaxKind["EqualsEqualsToken"] = 32] = "EqualsEqualsToken";
+        SyntaxKind[SyntaxKind["ExclamationEqualsToken"] = 33] = "ExclamationEqualsToken";
+        SyntaxKind[SyntaxKind["EqualsEqualsEqualsToken"] = 34] = "EqualsEqualsEqualsToken";
+        SyntaxKind[SyntaxKind["ExclamationEqualsEqualsToken"] = 35] = "ExclamationEqualsEqualsToken";
+        SyntaxKind[SyntaxKind["EqualsGreaterThanToken"] = 36] = "EqualsGreaterThanToken";
+        SyntaxKind[SyntaxKind["PlusToken"] = 37] = "PlusToken";
+        SyntaxKind[SyntaxKind["MinusToken"] = 38] = "MinusToken";
+        SyntaxKind[SyntaxKind["AsteriskToken"] = 39] = "AsteriskToken";
+        SyntaxKind[SyntaxKind["AsteriskAsteriskToken"] = 40] = "AsteriskAsteriskToken";
+        SyntaxKind[SyntaxKind["SlashToken"] = 41] = "SlashToken";
+        SyntaxKind[SyntaxKind["PercentToken"] = 42] = "PercentToken";
+        SyntaxKind[SyntaxKind["PlusPlusToken"] = 43] = "PlusPlusToken";
+        SyntaxKind[SyntaxKind["MinusMinusToken"] = 44] = "MinusMinusToken";
+        SyntaxKind[SyntaxKind["LessThanLessThanToken"] = 45] = "LessThanLessThanToken";
+        SyntaxKind[SyntaxKind["GreaterThanGreaterThanToken"] = 46] = "GreaterThanGreaterThanToken";
+        SyntaxKind[SyntaxKind["GreaterThanGreaterThanGreaterThanToken"] = 47] = "GreaterThanGreaterThanGreaterThanToken";
+        SyntaxKind[SyntaxKind["AmpersandToken"] = 48] = "AmpersandToken";
+        SyntaxKind[SyntaxKind["BarToken"] = 49] = "BarToken";
+        SyntaxKind[SyntaxKind["CaretToken"] = 50] = "CaretToken";
+        SyntaxKind[SyntaxKind["ExclamationToken"] = 51] = "ExclamationToken";
+        SyntaxKind[SyntaxKind["TildeToken"] = 52] = "TildeToken";
+        SyntaxKind[SyntaxKind["AmpersandAmpersandToken"] = 53] = "AmpersandAmpersandToken";
+        SyntaxKind[SyntaxKind["BarBarToken"] = 54] = "BarBarToken";
+        SyntaxKind[SyntaxKind["QuestionToken"] = 55] = "QuestionToken";
+        SyntaxKind[SyntaxKind["ColonToken"] = 56] = "ColonToken";
+        SyntaxKind[SyntaxKind["AtToken"] = 57] = "AtToken";
         // Assignments
-        SyntaxKind[SyntaxKind["EqualsToken"] = 56] = "EqualsToken";
-        SyntaxKind[SyntaxKind["PlusEqualsToken"] = 57] = "PlusEqualsToken";
-        SyntaxKind[SyntaxKind["MinusEqualsToken"] = 58] = "MinusEqualsToken";
-        SyntaxKind[SyntaxKind["AsteriskEqualsToken"] = 59] = "AsteriskEqualsToken";
-        SyntaxKind[SyntaxKind["AsteriskAsteriskEqualsToken"] = 60] = "AsteriskAsteriskEqualsToken";
-        SyntaxKind[SyntaxKind["SlashEqualsToken"] = 61] = "SlashEqualsToken";
-        SyntaxKind[SyntaxKind["PercentEqualsToken"] = 62] = "PercentEqualsToken";
-        SyntaxKind[SyntaxKind["LessThanLessThanEqualsToken"] = 63] = "LessThanLessThanEqualsToken";
-        SyntaxKind[SyntaxKind["GreaterThanGreaterThanEqualsToken"] = 64] = "GreaterThanGreaterThanEqualsToken";
-        SyntaxKind[SyntaxKind["GreaterThanGreaterThanGreaterThanEqualsToken"] = 65] = "GreaterThanGreaterThanGreaterThanEqualsToken";
-        SyntaxKind[SyntaxKind["AmpersandEqualsToken"] = 66] = "AmpersandEqualsToken";
-        SyntaxKind[SyntaxKind["BarEqualsToken"] = 67] = "BarEqualsToken";
-        SyntaxKind[SyntaxKind["CaretEqualsToken"] = 68] = "CaretEqualsToken";
+        SyntaxKind[SyntaxKind["EqualsToken"] = 58] = "EqualsToken";
+        SyntaxKind[SyntaxKind["PlusEqualsToken"] = 59] = "PlusEqualsToken";
+        SyntaxKind[SyntaxKind["MinusEqualsToken"] = 60] = "MinusEqualsToken";
+        SyntaxKind[SyntaxKind["AsteriskEqualsToken"] = 61] = "AsteriskEqualsToken";
+        SyntaxKind[SyntaxKind["AsteriskAsteriskEqualsToken"] = 62] = "AsteriskAsteriskEqualsToken";
+        SyntaxKind[SyntaxKind["SlashEqualsToken"] = 63] = "SlashEqualsToken";
+        SyntaxKind[SyntaxKind["PercentEqualsToken"] = 64] = "PercentEqualsToken";
+        SyntaxKind[SyntaxKind["LessThanLessThanEqualsToken"] = 65] = "LessThanLessThanEqualsToken";
+        SyntaxKind[SyntaxKind["GreaterThanGreaterThanEqualsToken"] = 66] = "GreaterThanGreaterThanEqualsToken";
+        SyntaxKind[SyntaxKind["GreaterThanGreaterThanGreaterThanEqualsToken"] = 67] = "GreaterThanGreaterThanGreaterThanEqualsToken";
+        SyntaxKind[SyntaxKind["AmpersandEqualsToken"] = 68] = "AmpersandEqualsToken";
+        SyntaxKind[SyntaxKind["BarEqualsToken"] = 69] = "BarEqualsToken";
+        SyntaxKind[SyntaxKind["CaretEqualsToken"] = 70] = "CaretEqualsToken";
         // Identifiers
-        SyntaxKind[SyntaxKind["Identifier"] = 69] = "Identifier";
+        SyntaxKind[SyntaxKind["Identifier"] = 71] = "Identifier";
         // Reserved words
-        SyntaxKind[SyntaxKind["BreakKeyword"] = 70] = "BreakKeyword";
-        SyntaxKind[SyntaxKind["CaseKeyword"] = 71] = "CaseKeyword";
-        SyntaxKind[SyntaxKind["CatchKeyword"] = 72] = "CatchKeyword";
-        SyntaxKind[SyntaxKind["ClassKeyword"] = 73] = "ClassKeyword";
-        SyntaxKind[SyntaxKind["ConstKeyword"] = 74] = "ConstKeyword";
-        SyntaxKind[SyntaxKind["ContinueKeyword"] = 75] = "ContinueKeyword";
-        SyntaxKind[SyntaxKind["DebuggerKeyword"] = 76] = "DebuggerKeyword";
-        SyntaxKind[SyntaxKind["DefaultKeyword"] = 77] = "DefaultKeyword";
-        SyntaxKind[SyntaxKind["DeleteKeyword"] = 78] = "DeleteKeyword";
-        SyntaxKind[SyntaxKind["DoKeyword"] = 79] = "DoKeyword";
-        SyntaxKind[SyntaxKind["ElseKeyword"] = 80] = "ElseKeyword";
-        SyntaxKind[SyntaxKind["EnumKeyword"] = 81] = "EnumKeyword";
-        SyntaxKind[SyntaxKind["ExportKeyword"] = 82] = "ExportKeyword";
-        SyntaxKind[SyntaxKind["ExtendsKeyword"] = 83] = "ExtendsKeyword";
-        SyntaxKind[SyntaxKind["FalseKeyword"] = 84] = "FalseKeyword";
-        SyntaxKind[SyntaxKind["FinallyKeyword"] = 85] = "FinallyKeyword";
-        SyntaxKind[SyntaxKind["ForKeyword"] = 86] = "ForKeyword";
-        SyntaxKind[SyntaxKind["FunctionKeyword"] = 87] = "FunctionKeyword";
-        SyntaxKind[SyntaxKind["IfKeyword"] = 88] = "IfKeyword";
-        SyntaxKind[SyntaxKind["ImportKeyword"] = 89] = "ImportKeyword";
-        SyntaxKind[SyntaxKind["InKeyword"] = 90] = "InKeyword";
-        SyntaxKind[SyntaxKind["InstanceOfKeyword"] = 91] = "InstanceOfKeyword";
-        SyntaxKind[SyntaxKind["NewKeyword"] = 92] = "NewKeyword";
-        SyntaxKind[SyntaxKind["NullKeyword"] = 93] = "NullKeyword";
-        SyntaxKind[SyntaxKind["ReturnKeyword"] = 94] = "ReturnKeyword";
-        SyntaxKind[SyntaxKind["SuperKeyword"] = 95] = "SuperKeyword";
-        SyntaxKind[SyntaxKind["SwitchKeyword"] = 96] = "SwitchKeyword";
-        SyntaxKind[SyntaxKind["ThisKeyword"] = 97] = "ThisKeyword";
-        SyntaxKind[SyntaxKind["ThrowKeyword"] = 98] = "ThrowKeyword";
-        SyntaxKind[SyntaxKind["TrueKeyword"] = 99] = "TrueKeyword";
-        SyntaxKind[SyntaxKind["TryKeyword"] = 100] = "TryKeyword";
-        SyntaxKind[SyntaxKind["TypeOfKeyword"] = 101] = "TypeOfKeyword";
-        SyntaxKind[SyntaxKind["VarKeyword"] = 102] = "VarKeyword";
-        SyntaxKind[SyntaxKind["VoidKeyword"] = 103] = "VoidKeyword";
-        SyntaxKind[SyntaxKind["WhileKeyword"] = 104] = "WhileKeyword";
-        SyntaxKind[SyntaxKind["WithKeyword"] = 105] = "WithKeyword";
+        SyntaxKind[SyntaxKind["BreakKeyword"] = 72] = "BreakKeyword";
+        SyntaxKind[SyntaxKind["CaseKeyword"] = 73] = "CaseKeyword";
+        SyntaxKind[SyntaxKind["CatchKeyword"] = 74] = "CatchKeyword";
+        SyntaxKind[SyntaxKind["ClassKeyword"] = 75] = "ClassKeyword";
+        SyntaxKind[SyntaxKind["ConstKeyword"] = 76] = "ConstKeyword";
+        SyntaxKind[SyntaxKind["ContinueKeyword"] = 77] = "ContinueKeyword";
+        SyntaxKind[SyntaxKind["DebuggerKeyword"] = 78] = "DebuggerKeyword";
+        SyntaxKind[SyntaxKind["DefaultKeyword"] = 79] = "DefaultKeyword";
+        SyntaxKind[SyntaxKind["DeleteKeyword"] = 80] = "DeleteKeyword";
+        SyntaxKind[SyntaxKind["DoKeyword"] = 81] = "DoKeyword";
+        SyntaxKind[SyntaxKind["ElseKeyword"] = 82] = "ElseKeyword";
+        SyntaxKind[SyntaxKind["EnumKeyword"] = 83] = "EnumKeyword";
+        SyntaxKind[SyntaxKind["ExportKeyword"] = 84] = "ExportKeyword";
+        SyntaxKind[SyntaxKind["ExtendsKeyword"] = 85] = "ExtendsKeyword";
+        SyntaxKind[SyntaxKind["FalseKeyword"] = 86] = "FalseKeyword";
+        SyntaxKind[SyntaxKind["FinallyKeyword"] = 87] = "FinallyKeyword";
+        SyntaxKind[SyntaxKind["ForKeyword"] = 88] = "ForKeyword";
+        SyntaxKind[SyntaxKind["FunctionKeyword"] = 89] = "FunctionKeyword";
+        SyntaxKind[SyntaxKind["IfKeyword"] = 90] = "IfKeyword";
+        SyntaxKind[SyntaxKind["ImportKeyword"] = 91] = "ImportKeyword";
+        SyntaxKind[SyntaxKind["InKeyword"] = 92] = "InKeyword";
+        SyntaxKind[SyntaxKind["InstanceOfKeyword"] = 93] = "InstanceOfKeyword";
+        SyntaxKind[SyntaxKind["NewKeyword"] = 94] = "NewKeyword";
+        SyntaxKind[SyntaxKind["NullKeyword"] = 95] = "NullKeyword";
+        SyntaxKind[SyntaxKind["ReturnKeyword"] = 96] = "ReturnKeyword";
+        SyntaxKind[SyntaxKind["SuperKeyword"] = 97] = "SuperKeyword";
+        SyntaxKind[SyntaxKind["SwitchKeyword"] = 98] = "SwitchKeyword";
+        SyntaxKind[SyntaxKind["ThisKeyword"] = 99] = "ThisKeyword";
+        SyntaxKind[SyntaxKind["ThrowKeyword"] = 100] = "ThrowKeyword";
+        SyntaxKind[SyntaxKind["TrueKeyword"] = 101] = "TrueKeyword";
+        SyntaxKind[SyntaxKind["TryKeyword"] = 102] = "TryKeyword";
+        SyntaxKind[SyntaxKind["TypeOfKeyword"] = 103] = "TypeOfKeyword";
+        SyntaxKind[SyntaxKind["VarKeyword"] = 104] = "VarKeyword";
+        SyntaxKind[SyntaxKind["VoidKeyword"] = 105] = "VoidKeyword";
+        SyntaxKind[SyntaxKind["WhileKeyword"] = 106] = "WhileKeyword";
+        SyntaxKind[SyntaxKind["WithKeyword"] = 107] = "WithKeyword";
         // Strict mode reserved words
-        SyntaxKind[SyntaxKind["ImplementsKeyword"] = 106] = "ImplementsKeyword";
-        SyntaxKind[SyntaxKind["InterfaceKeyword"] = 107] = "InterfaceKeyword";
-        SyntaxKind[SyntaxKind["LetKeyword"] = 108] = "LetKeyword";
-        SyntaxKind[SyntaxKind["PackageKeyword"] = 109] = "PackageKeyword";
-        SyntaxKind[SyntaxKind["PrivateKeyword"] = 110] = "PrivateKeyword";
-        SyntaxKind[SyntaxKind["ProtectedKeyword"] = 111] = "ProtectedKeyword";
-        SyntaxKind[SyntaxKind["PublicKeyword"] = 112] = "PublicKeyword";
-        SyntaxKind[SyntaxKind["StaticKeyword"] = 113] = "StaticKeyword";
-        SyntaxKind[SyntaxKind["YieldKeyword"] = 114] = "YieldKeyword";
+        SyntaxKind[SyntaxKind["ImplementsKeyword"] = 108] = "ImplementsKeyword";
+        SyntaxKind[SyntaxKind["InterfaceKeyword"] = 109] = "InterfaceKeyword";
+        SyntaxKind[SyntaxKind["LetKeyword"] = 110] = "LetKeyword";
+        SyntaxKind[SyntaxKind["PackageKeyword"] = 111] = "PackageKeyword";
+        SyntaxKind[SyntaxKind["PrivateKeyword"] = 112] = "PrivateKeyword";
+        SyntaxKind[SyntaxKind["ProtectedKeyword"] = 113] = "ProtectedKeyword";
+        SyntaxKind[SyntaxKind["PublicKeyword"] = 114] = "PublicKeyword";
+        SyntaxKind[SyntaxKind["StaticKeyword"] = 115] = "StaticKeyword";
+        SyntaxKind[SyntaxKind["YieldKeyword"] = 116] = "YieldKeyword";
         // Contextual keywords
-        SyntaxKind[SyntaxKind["AbstractKeyword"] = 115] = "AbstractKeyword";
-        SyntaxKind[SyntaxKind["AsKeyword"] = 116] = "AsKeyword";
-        SyntaxKind[SyntaxKind["AnyKeyword"] = 117] = "AnyKeyword";
-        SyntaxKind[SyntaxKind["AsyncKeyword"] = 118] = "AsyncKeyword";
-        SyntaxKind[SyntaxKind["AwaitKeyword"] = 119] = "AwaitKeyword";
-        SyntaxKind[SyntaxKind["BooleanKeyword"] = 120] = "BooleanKeyword";
-        SyntaxKind[SyntaxKind["ConstructorKeyword"] = 121] = "ConstructorKeyword";
-        SyntaxKind[SyntaxKind["DeclareKeyword"] = 122] = "DeclareKeyword";
-        SyntaxKind[SyntaxKind["GetKeyword"] = 123] = "GetKeyword";
-        SyntaxKind[SyntaxKind["IsKeyword"] = 124] = "IsKeyword";
-        SyntaxKind[SyntaxKind["ModuleKeyword"] = 125] = "ModuleKeyword";
-        SyntaxKind[SyntaxKind["NamespaceKeyword"] = 126] = "NamespaceKeyword";
-        SyntaxKind[SyntaxKind["NeverKeyword"] = 127] = "NeverKeyword";
-        SyntaxKind[SyntaxKind["ReadonlyKeyword"] = 128] = "ReadonlyKeyword";
-        SyntaxKind[SyntaxKind["RequireKeyword"] = 129] = "RequireKeyword";
-        SyntaxKind[SyntaxKind["NumberKeyword"] = 130] = "NumberKeyword";
-        SyntaxKind[SyntaxKind["SetKeyword"] = 131] = "SetKeyword";
-        SyntaxKind[SyntaxKind["StringKeyword"] = 132] = "StringKeyword";
-        SyntaxKind[SyntaxKind["SymbolKeyword"] = 133] = "SymbolKeyword";
-        SyntaxKind[SyntaxKind["TypeKeyword"] = 134] = "TypeKeyword";
-        SyntaxKind[SyntaxKind["UndefinedKeyword"] = 135] = "UndefinedKeyword";
-        SyntaxKind[SyntaxKind["FromKeyword"] = 136] = "FromKeyword";
-        SyntaxKind[SyntaxKind["GlobalKeyword"] = 137] = "GlobalKeyword";
-        SyntaxKind[SyntaxKind["OfKeyword"] = 138] = "OfKeyword";
+        SyntaxKind[SyntaxKind["AbstractKeyword"] = 117] = "AbstractKeyword";
+        SyntaxKind[SyntaxKind["AsKeyword"] = 118] = "AsKeyword";
+        SyntaxKind[SyntaxKind["AnyKeyword"] = 119] = "AnyKeyword";
+        SyntaxKind[SyntaxKind["AsyncKeyword"] = 120] = "AsyncKeyword";
+        SyntaxKind[SyntaxKind["AwaitKeyword"] = 121] = "AwaitKeyword";
+        SyntaxKind[SyntaxKind["BooleanKeyword"] = 122] = "BooleanKeyword";
+        SyntaxKind[SyntaxKind["ConstructorKeyword"] = 123] = "ConstructorKeyword";
+        SyntaxKind[SyntaxKind["DeclareKeyword"] = 124] = "DeclareKeyword";
+        SyntaxKind[SyntaxKind["GetKeyword"] = 125] = "GetKeyword";
+        SyntaxKind[SyntaxKind["IsKeyword"] = 126] = "IsKeyword";
+        SyntaxKind[SyntaxKind["KeyOfKeyword"] = 127] = "KeyOfKeyword";
+        SyntaxKind[SyntaxKind["ModuleKeyword"] = 128] = "ModuleKeyword";
+        SyntaxKind[SyntaxKind["NamespaceKeyword"] = 129] = "NamespaceKeyword";
+        SyntaxKind[SyntaxKind["NeverKeyword"] = 130] = "NeverKeyword";
+        SyntaxKind[SyntaxKind["ReadonlyKeyword"] = 131] = "ReadonlyKeyword";
+        SyntaxKind[SyntaxKind["RequireKeyword"] = 132] = "RequireKeyword";
+        SyntaxKind[SyntaxKind["NumberKeyword"] = 133] = "NumberKeyword";
+        SyntaxKind[SyntaxKind["ObjectKeyword"] = 134] = "ObjectKeyword";
+        SyntaxKind[SyntaxKind["SetKeyword"] = 135] = "SetKeyword";
+        SyntaxKind[SyntaxKind["StringKeyword"] = 136] = "StringKeyword";
+        SyntaxKind[SyntaxKind["SymbolKeyword"] = 137] = "SymbolKeyword";
+        SyntaxKind[SyntaxKind["TypeKeyword"] = 138] = "TypeKeyword";
+        SyntaxKind[SyntaxKind["UndefinedKeyword"] = 139] = "UndefinedKeyword";
+        SyntaxKind[SyntaxKind["FromKeyword"] = 140] = "FromKeyword";
+        SyntaxKind[SyntaxKind["GlobalKeyword"] = 141] = "GlobalKeyword";
+        SyntaxKind[SyntaxKind["OfKeyword"] = 142] = "OfKeyword";
         // Parse tree nodes
         // Names
-        SyntaxKind[SyntaxKind["QualifiedName"] = 139] = "QualifiedName";
-        SyntaxKind[SyntaxKind["ComputedPropertyName"] = 140] = "ComputedPropertyName";
+        SyntaxKind[SyntaxKind["QualifiedName"] = 143] = "QualifiedName";
+        SyntaxKind[SyntaxKind["ComputedPropertyName"] = 144] = "ComputedPropertyName";
         // Signature elements
-        SyntaxKind[SyntaxKind["TypeParameter"] = 141] = "TypeParameter";
-        SyntaxKind[SyntaxKind["Parameter"] = 142] = "Parameter";
-        SyntaxKind[SyntaxKind["Decorator"] = 143] = "Decorator";
+        SyntaxKind[SyntaxKind["TypeParameter"] = 145] = "TypeParameter";
+        SyntaxKind[SyntaxKind["Parameter"] = 146] = "Parameter";
+        SyntaxKind[SyntaxKind["Decorator"] = 147] = "Decorator";
         // TypeMember
-        SyntaxKind[SyntaxKind["PropertySignature"] = 144] = "PropertySignature";
-        SyntaxKind[SyntaxKind["PropertyDeclaration"] = 145] = "PropertyDeclaration";
-        SyntaxKind[SyntaxKind["MethodSignature"] = 146] = "MethodSignature";
-        SyntaxKind[SyntaxKind["MethodDeclaration"] = 147] = "MethodDeclaration";
-        SyntaxKind[SyntaxKind["Constructor"] = 148] = "Constructor";
-        SyntaxKind[SyntaxKind["GetAccessor"] = 149] = "GetAccessor";
-        SyntaxKind[SyntaxKind["SetAccessor"] = 150] = "SetAccessor";
-        SyntaxKind[SyntaxKind["CallSignature"] = 151] = "CallSignature";
-        SyntaxKind[SyntaxKind["ConstructSignature"] = 152] = "ConstructSignature";
-        SyntaxKind[SyntaxKind["IndexSignature"] = 153] = "IndexSignature";
+        SyntaxKind[SyntaxKind["PropertySignature"] = 148] = "PropertySignature";
+        SyntaxKind[SyntaxKind["PropertyDeclaration"] = 149] = "PropertyDeclaration";
+        SyntaxKind[SyntaxKind["MethodSignature"] = 150] = "MethodSignature";
+        SyntaxKind[SyntaxKind["MethodDeclaration"] = 151] = "MethodDeclaration";
+        SyntaxKind[SyntaxKind["Constructor"] = 152] = "Constructor";
+        SyntaxKind[SyntaxKind["GetAccessor"] = 153] = "GetAccessor";
+        SyntaxKind[SyntaxKind["SetAccessor"] = 154] = "SetAccessor";
+        SyntaxKind[SyntaxKind["CallSignature"] = 155] = "CallSignature";
+        SyntaxKind[SyntaxKind["ConstructSignature"] = 156] = "ConstructSignature";
+        SyntaxKind[SyntaxKind["IndexSignature"] = 157] = "IndexSignature";
         // Type
-        SyntaxKind[SyntaxKind["TypePredicate"] = 154] = "TypePredicate";
-        SyntaxKind[SyntaxKind["TypeReference"] = 155] = "TypeReference";
-        SyntaxKind[SyntaxKind["FunctionType"] = 156] = "FunctionType";
-        SyntaxKind[SyntaxKind["ConstructorType"] = 157] = "ConstructorType";
-        SyntaxKind[SyntaxKind["TypeQuery"] = 158] = "TypeQuery";
-        SyntaxKind[SyntaxKind["TypeLiteral"] = 159] = "TypeLiteral";
-        SyntaxKind[SyntaxKind["ArrayType"] = 160] = "ArrayType";
-        SyntaxKind[SyntaxKind["TupleType"] = 161] = "TupleType";
-        SyntaxKind[SyntaxKind["UnionType"] = 162] = "UnionType";
-        SyntaxKind[SyntaxKind["IntersectionType"] = 163] = "IntersectionType";
-        SyntaxKind[SyntaxKind["ParenthesizedType"] = 164] = "ParenthesizedType";
-        SyntaxKind[SyntaxKind["ThisType"] = 165] = "ThisType";
-        SyntaxKind[SyntaxKind["LiteralType"] = 166] = "LiteralType";
+        SyntaxKind[SyntaxKind["TypePredicate"] = 158] = "TypePredicate";
+        SyntaxKind[SyntaxKind["TypeReference"] = 159] = "TypeReference";
+        SyntaxKind[SyntaxKind["FunctionType"] = 160] = "FunctionType";
+        SyntaxKind[SyntaxKind["ConstructorType"] = 161] = "ConstructorType";
+        SyntaxKind[SyntaxKind["TypeQuery"] = 162] = "TypeQuery";
+        SyntaxKind[SyntaxKind["TypeLiteral"] = 163] = "TypeLiteral";
+        SyntaxKind[SyntaxKind["ArrayType"] = 164] = "ArrayType";
+        SyntaxKind[SyntaxKind["TupleType"] = 165] = "TupleType";
+        SyntaxKind[SyntaxKind["UnionType"] = 166] = "UnionType";
+        SyntaxKind[SyntaxKind["IntersectionType"] = 167] = "IntersectionType";
+        SyntaxKind[SyntaxKind["ParenthesizedType"] = 168] = "ParenthesizedType";
+        SyntaxKind[SyntaxKind["ThisType"] = 169] = "ThisType";
+        SyntaxKind[SyntaxKind["TypeOperator"] = 170] = "TypeOperator";
+        SyntaxKind[SyntaxKind["IndexedAccessType"] = 171] = "IndexedAccessType";
+        SyntaxKind[SyntaxKind["MappedType"] = 172] = "MappedType";
+        SyntaxKind[SyntaxKind["LiteralType"] = 173] = "LiteralType";
         // Binding patterns
-        SyntaxKind[SyntaxKind["ObjectBindingPattern"] = 167] = "ObjectBindingPattern";
-        SyntaxKind[SyntaxKind["ArrayBindingPattern"] = 168] = "ArrayBindingPattern";
-        SyntaxKind[SyntaxKind["BindingElement"] = 169] = "BindingElement";
+        SyntaxKind[SyntaxKind["ObjectBindingPattern"] = 174] = "ObjectBindingPattern";
+        SyntaxKind[SyntaxKind["ArrayBindingPattern"] = 175] = "ArrayBindingPattern";
+        SyntaxKind[SyntaxKind["BindingElement"] = 176] = "BindingElement";
         // Expression
-        SyntaxKind[SyntaxKind["ArrayLiteralExpression"] = 170] = "ArrayLiteralExpression";
-        SyntaxKind[SyntaxKind["ObjectLiteralExpression"] = 171] = "ObjectLiteralExpression";
-        SyntaxKind[SyntaxKind["PropertyAccessExpression"] = 172] = "PropertyAccessExpression";
-        SyntaxKind[SyntaxKind["ElementAccessExpression"] = 173] = "ElementAccessExpression";
-        SyntaxKind[SyntaxKind["CallExpression"] = 174] = "CallExpression";
-        SyntaxKind[SyntaxKind["NewExpression"] = 175] = "NewExpression";
-        SyntaxKind[SyntaxKind["TaggedTemplateExpression"] = 176] = "TaggedTemplateExpression";
-        SyntaxKind[SyntaxKind["TypeAssertionExpression"] = 177] = "TypeAssertionExpression";
-        SyntaxKind[SyntaxKind["ParenthesizedExpression"] = 178] = "ParenthesizedExpression";
-        SyntaxKind[SyntaxKind["FunctionExpression"] = 179] = "FunctionExpression";
-        SyntaxKind[SyntaxKind["ArrowFunction"] = 180] = "ArrowFunction";
-        SyntaxKind[SyntaxKind["DeleteExpression"] = 181] = "DeleteExpression";
-        SyntaxKind[SyntaxKind["TypeOfExpression"] = 182] = "TypeOfExpression";
-        SyntaxKind[SyntaxKind["VoidExpression"] = 183] = "VoidExpression";
-        SyntaxKind[SyntaxKind["AwaitExpression"] = 184] = "AwaitExpression";
-        SyntaxKind[SyntaxKind["PrefixUnaryExpression"] = 185] = "PrefixUnaryExpression";
-        SyntaxKind[SyntaxKind["PostfixUnaryExpression"] = 186] = "PostfixUnaryExpression";
-        SyntaxKind[SyntaxKind["BinaryExpression"] = 187] = "BinaryExpression";
-        SyntaxKind[SyntaxKind["ConditionalExpression"] = 188] = "ConditionalExpression";
-        SyntaxKind[SyntaxKind["TemplateExpression"] = 189] = "TemplateExpression";
-        SyntaxKind[SyntaxKind["YieldExpression"] = 190] = "YieldExpression";
-        SyntaxKind[SyntaxKind["SpreadElementExpression"] = 191] = "SpreadElementExpression";
-        SyntaxKind[SyntaxKind["ClassExpression"] = 192] = "ClassExpression";
-        SyntaxKind[SyntaxKind["OmittedExpression"] = 193] = "OmittedExpression";
-        SyntaxKind[SyntaxKind["ExpressionWithTypeArguments"] = 194] = "ExpressionWithTypeArguments";
-        SyntaxKind[SyntaxKind["AsExpression"] = 195] = "AsExpression";
-        SyntaxKind[SyntaxKind["NonNullExpression"] = 196] = "NonNullExpression";
+        SyntaxKind[SyntaxKind["ArrayLiteralExpression"] = 177] = "ArrayLiteralExpression";
+        SyntaxKind[SyntaxKind["ObjectLiteralExpression"] = 178] = "ObjectLiteralExpression";
+        SyntaxKind[SyntaxKind["PropertyAccessExpression"] = 179] = "PropertyAccessExpression";
+        SyntaxKind[SyntaxKind["ElementAccessExpression"] = 180] = "ElementAccessExpression";
+        SyntaxKind[SyntaxKind["CallExpression"] = 181] = "CallExpression";
+        SyntaxKind[SyntaxKind["NewExpression"] = 182] = "NewExpression";
+        SyntaxKind[SyntaxKind["TaggedTemplateExpression"] = 183] = "TaggedTemplateExpression";
+        SyntaxKind[SyntaxKind["TypeAssertionExpression"] = 184] = "TypeAssertionExpression";
+        SyntaxKind[SyntaxKind["ParenthesizedExpression"] = 185] = "ParenthesizedExpression";
+        SyntaxKind[SyntaxKind["FunctionExpression"] = 186] = "FunctionExpression";
+        SyntaxKind[SyntaxKind["ArrowFunction"] = 187] = "ArrowFunction";
+        SyntaxKind[SyntaxKind["DeleteExpression"] = 188] = "DeleteExpression";
+        SyntaxKind[SyntaxKind["TypeOfExpression"] = 189] = "TypeOfExpression";
+        SyntaxKind[SyntaxKind["VoidExpression"] = 190] = "VoidExpression";
+        SyntaxKind[SyntaxKind["AwaitExpression"] = 191] = "AwaitExpression";
+        SyntaxKind[SyntaxKind["PrefixUnaryExpression"] = 192] = "PrefixUnaryExpression";
+        SyntaxKind[SyntaxKind["PostfixUnaryExpression"] = 193] = "PostfixUnaryExpression";
+        SyntaxKind[SyntaxKind["BinaryExpression"] = 194] = "BinaryExpression";
+        SyntaxKind[SyntaxKind["ConditionalExpression"] = 195] = "ConditionalExpression";
+        SyntaxKind[SyntaxKind["TemplateExpression"] = 196] = "TemplateExpression";
+        SyntaxKind[SyntaxKind["YieldExpression"] = 197] = "YieldExpression";
+        SyntaxKind[SyntaxKind["SpreadElement"] = 198] = "SpreadElement";
+        SyntaxKind[SyntaxKind["ClassExpression"] = 199] = "ClassExpression";
+        SyntaxKind[SyntaxKind["OmittedExpression"] = 200] = "OmittedExpression";
+        SyntaxKind[SyntaxKind["ExpressionWithTypeArguments"] = 201] = "ExpressionWithTypeArguments";
+        SyntaxKind[SyntaxKind["AsExpression"] = 202] = "AsExpression";
+        SyntaxKind[SyntaxKind["NonNullExpression"] = 203] = "NonNullExpression";
+        SyntaxKind[SyntaxKind["MetaProperty"] = 204] = "MetaProperty";
         // Misc
-        SyntaxKind[SyntaxKind["TemplateSpan"] = 197] = "TemplateSpan";
-        SyntaxKind[SyntaxKind["SemicolonClassElement"] = 198] = "SemicolonClassElement";
+        SyntaxKind[SyntaxKind["TemplateSpan"] = 205] = "TemplateSpan";
+        SyntaxKind[SyntaxKind["SemicolonClassElement"] = 206] = "SemicolonClassElement";
         // Element
-        SyntaxKind[SyntaxKind["Block"] = 199] = "Block";
-        SyntaxKind[SyntaxKind["VariableStatement"] = 200] = "VariableStatement";
-        SyntaxKind[SyntaxKind["EmptyStatement"] = 201] = "EmptyStatement";
-        SyntaxKind[SyntaxKind["ExpressionStatement"] = 202] = "ExpressionStatement";
-        SyntaxKind[SyntaxKind["IfStatement"] = 203] = "IfStatement";
-        SyntaxKind[SyntaxKind["DoStatement"] = 204] = "DoStatement";
-        SyntaxKind[SyntaxKind["WhileStatement"] = 205] = "WhileStatement";
-        SyntaxKind[SyntaxKind["ForStatement"] = 206] = "ForStatement";
-        SyntaxKind[SyntaxKind["ForInStatement"] = 207] = "ForInStatement";
-        SyntaxKind[SyntaxKind["ForOfStatement"] = 208] = "ForOfStatement";
-        SyntaxKind[SyntaxKind["ContinueStatement"] = 209] = "ContinueStatement";
-        SyntaxKind[SyntaxKind["BreakStatement"] = 210] = "BreakStatement";
-        SyntaxKind[SyntaxKind["ReturnStatement"] = 211] = "ReturnStatement";
-        SyntaxKind[SyntaxKind["WithStatement"] = 212] = "WithStatement";
-        SyntaxKind[SyntaxKind["SwitchStatement"] = 213] = "SwitchStatement";
-        SyntaxKind[SyntaxKind["LabeledStatement"] = 214] = "LabeledStatement";
-        SyntaxKind[SyntaxKind["ThrowStatement"] = 215] = "ThrowStatement";
-        SyntaxKind[SyntaxKind["TryStatement"] = 216] = "TryStatement";
-        SyntaxKind[SyntaxKind["DebuggerStatement"] = 217] = "DebuggerStatement";
-        SyntaxKind[SyntaxKind["VariableDeclaration"] = 218] = "VariableDeclaration";
-        SyntaxKind[SyntaxKind["VariableDeclarationList"] = 219] = "VariableDeclarationList";
-        SyntaxKind[SyntaxKind["FunctionDeclaration"] = 220] = "FunctionDeclaration";
-        SyntaxKind[SyntaxKind["ClassDeclaration"] = 221] = "ClassDeclaration";
-        SyntaxKind[SyntaxKind["InterfaceDeclaration"] = 222] = "InterfaceDeclaration";
-        SyntaxKind[SyntaxKind["TypeAliasDeclaration"] = 223] = "TypeAliasDeclaration";
-        SyntaxKind[SyntaxKind["EnumDeclaration"] = 224] = "EnumDeclaration";
-        SyntaxKind[SyntaxKind["ModuleDeclaration"] = 225] = "ModuleDeclaration";
-        SyntaxKind[SyntaxKind["ModuleBlock"] = 226] = "ModuleBlock";
-        SyntaxKind[SyntaxKind["CaseBlock"] = 227] = "CaseBlock";
-        SyntaxKind[SyntaxKind["NamespaceExportDeclaration"] = 228] = "NamespaceExportDeclaration";
-        SyntaxKind[SyntaxKind["ImportEqualsDeclaration"] = 229] = "ImportEqualsDeclaration";
-        SyntaxKind[SyntaxKind["ImportDeclaration"] = 230] = "ImportDeclaration";
-        SyntaxKind[SyntaxKind["ImportClause"] = 231] = "ImportClause";
-        SyntaxKind[SyntaxKind["NamespaceImport"] = 232] = "NamespaceImport";
-        SyntaxKind[SyntaxKind["NamedImports"] = 233] = "NamedImports";
-        SyntaxKind[SyntaxKind["ImportSpecifier"] = 234] = "ImportSpecifier";
-        SyntaxKind[SyntaxKind["ExportAssignment"] = 235] = "ExportAssignment";
-        SyntaxKind[SyntaxKind["ExportDeclaration"] = 236] = "ExportDeclaration";
-        SyntaxKind[SyntaxKind["NamedExports"] = 237] = "NamedExports";
-        SyntaxKind[SyntaxKind["ExportSpecifier"] = 238] = "ExportSpecifier";
-        SyntaxKind[SyntaxKind["MissingDeclaration"] = 239] = "MissingDeclaration";
+        SyntaxKind[SyntaxKind["Block"] = 207] = "Block";
+        SyntaxKind[SyntaxKind["VariableStatement"] = 208] = "VariableStatement";
+        SyntaxKind[SyntaxKind["EmptyStatement"] = 209] = "EmptyStatement";
+        SyntaxKind[SyntaxKind["ExpressionStatement"] = 210] = "ExpressionStatement";
+        SyntaxKind[SyntaxKind["IfStatement"] = 211] = "IfStatement";
+        SyntaxKind[SyntaxKind["DoStatement"] = 212] = "DoStatement";
+        SyntaxKind[SyntaxKind["WhileStatement"] = 213] = "WhileStatement";
+        SyntaxKind[SyntaxKind["ForStatement"] = 214] = "ForStatement";
+        SyntaxKind[SyntaxKind["ForInStatement"] = 215] = "ForInStatement";
+        SyntaxKind[SyntaxKind["ForOfStatement"] = 216] = "ForOfStatement";
+        SyntaxKind[SyntaxKind["ContinueStatement"] = 217] = "ContinueStatement";
+        SyntaxKind[SyntaxKind["BreakStatement"] = 218] = "BreakStatement";
+        SyntaxKind[SyntaxKind["ReturnStatement"] = 219] = "ReturnStatement";
+        SyntaxKind[SyntaxKind["WithStatement"] = 220] = "WithStatement";
+        SyntaxKind[SyntaxKind["SwitchStatement"] = 221] = "SwitchStatement";
+        SyntaxKind[SyntaxKind["LabeledStatement"] = 222] = "LabeledStatement";
+        SyntaxKind[SyntaxKind["ThrowStatement"] = 223] = "ThrowStatement";
+        SyntaxKind[SyntaxKind["TryStatement"] = 224] = "TryStatement";
+        SyntaxKind[SyntaxKind["DebuggerStatement"] = 225] = "DebuggerStatement";
+        SyntaxKind[SyntaxKind["VariableDeclaration"] = 226] = "VariableDeclaration";
+        SyntaxKind[SyntaxKind["VariableDeclarationList"] = 227] = "VariableDeclarationList";
+        SyntaxKind[SyntaxKind["FunctionDeclaration"] = 228] = "FunctionDeclaration";
+        SyntaxKind[SyntaxKind["ClassDeclaration"] = 229] = "ClassDeclaration";
+        SyntaxKind[SyntaxKind["InterfaceDeclaration"] = 230] = "InterfaceDeclaration";
+        SyntaxKind[SyntaxKind["TypeAliasDeclaration"] = 231] = "TypeAliasDeclaration";
+        SyntaxKind[SyntaxKind["EnumDeclaration"] = 232] = "EnumDeclaration";
+        SyntaxKind[SyntaxKind["ModuleDeclaration"] = 233] = "ModuleDeclaration";
+        SyntaxKind[SyntaxKind["ModuleBlock"] = 234] = "ModuleBlock";
+        SyntaxKind[SyntaxKind["CaseBlock"] = 235] = "CaseBlock";
+        SyntaxKind[SyntaxKind["NamespaceExportDeclaration"] = 236] = "NamespaceExportDeclaration";
+        SyntaxKind[SyntaxKind["ImportEqualsDeclaration"] = 237] = "ImportEqualsDeclaration";
+        SyntaxKind[SyntaxKind["ImportDeclaration"] = 238] = "ImportDeclaration";
+        SyntaxKind[SyntaxKind["ImportClause"] = 239] = "ImportClause";
+        SyntaxKind[SyntaxKind["NamespaceImport"] = 240] = "NamespaceImport";
+        SyntaxKind[SyntaxKind["NamedImports"] = 241] = "NamedImports";
+        SyntaxKind[SyntaxKind["ImportSpecifier"] = 242] = "ImportSpecifier";
+        SyntaxKind[SyntaxKind["ExportAssignment"] = 243] = "ExportAssignment";
+        SyntaxKind[SyntaxKind["ExportDeclaration"] = 244] = "ExportDeclaration";
+        SyntaxKind[SyntaxKind["NamedExports"] = 245] = "NamedExports";
+        SyntaxKind[SyntaxKind["ExportSpecifier"] = 246] = "ExportSpecifier";
+        SyntaxKind[SyntaxKind["MissingDeclaration"] = 247] = "MissingDeclaration";
         // Module references
-        SyntaxKind[SyntaxKind["ExternalModuleReference"] = 240] = "ExternalModuleReference";
+        SyntaxKind[SyntaxKind["ExternalModuleReference"] = 248] = "ExternalModuleReference";
         // JSX
-        SyntaxKind[SyntaxKind["JsxElement"] = 241] = "JsxElement";
-        SyntaxKind[SyntaxKind["JsxSelfClosingElement"] = 242] = "JsxSelfClosingElement";
-        SyntaxKind[SyntaxKind["JsxOpeningElement"] = 243] = "JsxOpeningElement";
-        SyntaxKind[SyntaxKind["JsxText"] = 244] = "JsxText";
-        SyntaxKind[SyntaxKind["JsxClosingElement"] = 245] = "JsxClosingElement";
-        SyntaxKind[SyntaxKind["JsxAttribute"] = 246] = "JsxAttribute";
-        SyntaxKind[SyntaxKind["JsxSpreadAttribute"] = 247] = "JsxSpreadAttribute";
-        SyntaxKind[SyntaxKind["JsxExpression"] = 248] = "JsxExpression";
+        SyntaxKind[SyntaxKind["JsxElement"] = 249] = "JsxElement";
+        SyntaxKind[SyntaxKind["JsxSelfClosingElement"] = 250] = "JsxSelfClosingElement";
+        SyntaxKind[SyntaxKind["JsxOpeningElement"] = 251] = "JsxOpeningElement";
+        SyntaxKind[SyntaxKind["JsxClosingElement"] = 252] = "JsxClosingElement";
+        SyntaxKind[SyntaxKind["JsxAttribute"] = 253] = "JsxAttribute";
+        SyntaxKind[SyntaxKind["JsxAttributes"] = 254] = "JsxAttributes";
+        SyntaxKind[SyntaxKind["JsxSpreadAttribute"] = 255] = "JsxSpreadAttribute";
+        SyntaxKind[SyntaxKind["JsxExpression"] = 256] = "JsxExpression";
         // Clauses
-        SyntaxKind[SyntaxKind["CaseClause"] = 249] = "CaseClause";
-        SyntaxKind[SyntaxKind["DefaultClause"] = 250] = "DefaultClause";
-        SyntaxKind[SyntaxKind["HeritageClause"] = 251] = "HeritageClause";
-        SyntaxKind[SyntaxKind["CatchClause"] = 252] = "CatchClause";
+        SyntaxKind[SyntaxKind["CaseClause"] = 257] = "CaseClause";
+        SyntaxKind[SyntaxKind["DefaultClause"] = 258] = "DefaultClause";
+        SyntaxKind[SyntaxKind["HeritageClause"] = 259] = "HeritageClause";
+        SyntaxKind[SyntaxKind["CatchClause"] = 260] = "CatchClause";
         // Property assignments
-        SyntaxKind[SyntaxKind["PropertyAssignment"] = 253] = "PropertyAssignment";
-        SyntaxKind[SyntaxKind["ShorthandPropertyAssignment"] = 254] = "ShorthandPropertyAssignment";
+        SyntaxKind[SyntaxKind["PropertyAssignment"] = 261] = "PropertyAssignment";
+        SyntaxKind[SyntaxKind["ShorthandPropertyAssignment"] = 262] = "ShorthandPropertyAssignment";
+        SyntaxKind[SyntaxKind["SpreadAssignment"] = 263] = "SpreadAssignment";
         // Enum
-        SyntaxKind[SyntaxKind["EnumMember"] = 255] = "EnumMember";
+        SyntaxKind[SyntaxKind["EnumMember"] = 264] = "EnumMember";
         // Top-level nodes
-        SyntaxKind[SyntaxKind["SourceFile"] = 256] = "SourceFile";
+        SyntaxKind[SyntaxKind["SourceFile"] = 265] = "SourceFile";
+        SyntaxKind[SyntaxKind["Bundle"] = 266] = "Bundle";
         // JSDoc nodes
-        SyntaxKind[SyntaxKind["JSDocTypeExpression"] = 257] = "JSDocTypeExpression";
+        SyntaxKind[SyntaxKind["JSDocTypeExpression"] = 267] = "JSDocTypeExpression";
         // The * type
-        SyntaxKind[SyntaxKind["JSDocAllType"] = 258] = "JSDocAllType";
+        SyntaxKind[SyntaxKind["JSDocAllType"] = 268] = "JSDocAllType";
         // The ? type
-        SyntaxKind[SyntaxKind["JSDocUnknownType"] = 259] = "JSDocUnknownType";
-        SyntaxKind[SyntaxKind["JSDocArrayType"] = 260] = "JSDocArrayType";
-        SyntaxKind[SyntaxKind["JSDocUnionType"] = 261] = "JSDocUnionType";
-        SyntaxKind[SyntaxKind["JSDocTupleType"] = 262] = "JSDocTupleType";
-        SyntaxKind[SyntaxKind["JSDocNullableType"] = 263] = "JSDocNullableType";
-        SyntaxKind[SyntaxKind["JSDocNonNullableType"] = 264] = "JSDocNonNullableType";
-        SyntaxKind[SyntaxKind["JSDocRecordType"] = 265] = "JSDocRecordType";
-        SyntaxKind[SyntaxKind["JSDocRecordMember"] = 266] = "JSDocRecordMember";
-        SyntaxKind[SyntaxKind["JSDocTypeReference"] = 267] = "JSDocTypeReference";
-        SyntaxKind[SyntaxKind["JSDocOptionalType"] = 268] = "JSDocOptionalType";
-        SyntaxKind[SyntaxKind["JSDocFunctionType"] = 269] = "JSDocFunctionType";
-        SyntaxKind[SyntaxKind["JSDocVariadicType"] = 270] = "JSDocVariadicType";
-        SyntaxKind[SyntaxKind["JSDocConstructorType"] = 271] = "JSDocConstructorType";
-        SyntaxKind[SyntaxKind["JSDocThisType"] = 272] = "JSDocThisType";
-        SyntaxKind[SyntaxKind["JSDocComment"] = 273] = "JSDocComment";
-        SyntaxKind[SyntaxKind["JSDocTag"] = 274] = "JSDocTag";
-        SyntaxKind[SyntaxKind["JSDocParameterTag"] = 275] = "JSDocParameterTag";
-        SyntaxKind[SyntaxKind["JSDocReturnTag"] = 276] = "JSDocReturnTag";
-        SyntaxKind[SyntaxKind["JSDocTypeTag"] = 277] = "JSDocTypeTag";
-        SyntaxKind[SyntaxKind["JSDocTemplateTag"] = 278] = "JSDocTemplateTag";
-        SyntaxKind[SyntaxKind["JSDocTypedefTag"] = 279] = "JSDocTypedefTag";
-        SyntaxKind[SyntaxKind["JSDocPropertyTag"] = 280] = "JSDocPropertyTag";
-        SyntaxKind[SyntaxKind["JSDocTypeLiteral"] = 281] = "JSDocTypeLiteral";
-        SyntaxKind[SyntaxKind["JSDocLiteralType"] = 282] = "JSDocLiteralType";
-        SyntaxKind[SyntaxKind["JSDocNullKeyword"] = 283] = "JSDocNullKeyword";
-        SyntaxKind[SyntaxKind["JSDocUndefinedKeyword"] = 284] = "JSDocUndefinedKeyword";
-        SyntaxKind[SyntaxKind["JSDocNeverKeyword"] = 285] = "JSDocNeverKeyword";
+        SyntaxKind[SyntaxKind["JSDocUnknownType"] = 269] = "JSDocUnknownType";
+        SyntaxKind[SyntaxKind["JSDocArrayType"] = 270] = "JSDocArrayType";
+        SyntaxKind[SyntaxKind["JSDocUnionType"] = 271] = "JSDocUnionType";
+        SyntaxKind[SyntaxKind["JSDocTupleType"] = 272] = "JSDocTupleType";
+        SyntaxKind[SyntaxKind["JSDocNullableType"] = 273] = "JSDocNullableType";
+        SyntaxKind[SyntaxKind["JSDocNonNullableType"] = 274] = "JSDocNonNullableType";
+        SyntaxKind[SyntaxKind["JSDocRecordType"] = 275] = "JSDocRecordType";
+        SyntaxKind[SyntaxKind["JSDocRecordMember"] = 276] = "JSDocRecordMember";
+        SyntaxKind[SyntaxKind["JSDocTypeReference"] = 277] = "JSDocTypeReference";
+        SyntaxKind[SyntaxKind["JSDocOptionalType"] = 278] = "JSDocOptionalType";
+        SyntaxKind[SyntaxKind["JSDocFunctionType"] = 279] = "JSDocFunctionType";
+        SyntaxKind[SyntaxKind["JSDocVariadicType"] = 280] = "JSDocVariadicType";
+        SyntaxKind[SyntaxKind["JSDocConstructorType"] = 281] = "JSDocConstructorType";
+        SyntaxKind[SyntaxKind["JSDocThisType"] = 282] = "JSDocThisType";
+        SyntaxKind[SyntaxKind["JSDocComment"] = 283] = "JSDocComment";
+        SyntaxKind[SyntaxKind["JSDocTag"] = 284] = "JSDocTag";
+        SyntaxKind[SyntaxKind["JSDocAugmentsTag"] = 285] = "JSDocAugmentsTag";
+        SyntaxKind[SyntaxKind["JSDocClassTag"] = 286] = "JSDocClassTag";
+        SyntaxKind[SyntaxKind["JSDocParameterTag"] = 287] = "JSDocParameterTag";
+        SyntaxKind[SyntaxKind["JSDocReturnTag"] = 288] = "JSDocReturnTag";
+        SyntaxKind[SyntaxKind["JSDocTypeTag"] = 289] = "JSDocTypeTag";
+        SyntaxKind[SyntaxKind["JSDocTemplateTag"] = 290] = "JSDocTemplateTag";
+        SyntaxKind[SyntaxKind["JSDocTypedefTag"] = 291] = "JSDocTypedefTag";
+        SyntaxKind[SyntaxKind["JSDocPropertyTag"] = 292] = "JSDocPropertyTag";
+        SyntaxKind[SyntaxKind["JSDocTypeLiteral"] = 293] = "JSDocTypeLiteral";
+        SyntaxKind[SyntaxKind["JSDocLiteralType"] = 294] = "JSDocLiteralType";
         // Synthesized list
-        SyntaxKind[SyntaxKind["SyntaxList"] = 286] = "SyntaxList";
+        SyntaxKind[SyntaxKind["SyntaxList"] = 295] = "SyntaxList";
         // Transformation nodes
-        SyntaxKind[SyntaxKind["NotEmittedStatement"] = 287] = "NotEmittedStatement";
-        SyntaxKind[SyntaxKind["PartiallyEmittedExpression"] = 288] = "PartiallyEmittedExpression";
+        SyntaxKind[SyntaxKind["NotEmittedStatement"] = 296] = "NotEmittedStatement";
+        SyntaxKind[SyntaxKind["PartiallyEmittedExpression"] = 297] = "PartiallyEmittedExpression";
+        SyntaxKind[SyntaxKind["CommaListExpression"] = 298] = "CommaListExpression";
+        SyntaxKind[SyntaxKind["MergeDeclarationMarker"] = 299] = "MergeDeclarationMarker";
+        SyntaxKind[SyntaxKind["EndOfDeclarationMarker"] = 300] = "EndOfDeclarationMarker";
         // Enum value count
-        SyntaxKind[SyntaxKind["Count"] = 289] = "Count";
+        SyntaxKind[SyntaxKind["Count"] = 301] = "Count";
         // Markers
-        SyntaxKind[SyntaxKind["FirstAssignment"] = 56] = "FirstAssignment";
-        SyntaxKind[SyntaxKind["LastAssignment"] = 68] = "LastAssignment";
-        SyntaxKind[SyntaxKind["FirstCompoundAssignment"] = 57] = "FirstCompoundAssignment";
-        SyntaxKind[SyntaxKind["LastCompoundAssignment"] = 68] = "LastCompoundAssignment";
-        SyntaxKind[SyntaxKind["FirstReservedWord"] = 70] = "FirstReservedWord";
-        SyntaxKind[SyntaxKind["LastReservedWord"] = 105] = "LastReservedWord";
-        SyntaxKind[SyntaxKind["FirstKeyword"] = 70] = "FirstKeyword";
-        SyntaxKind[SyntaxKind["LastKeyword"] = 138] = "LastKeyword";
-        SyntaxKind[SyntaxKind["FirstFutureReservedWord"] = 106] = "FirstFutureReservedWord";
-        SyntaxKind[SyntaxKind["LastFutureReservedWord"] = 114] = "LastFutureReservedWord";
-        SyntaxKind[SyntaxKind["FirstTypeNode"] = 154] = "FirstTypeNode";
-        SyntaxKind[SyntaxKind["LastTypeNode"] = 166] = "LastTypeNode";
-        SyntaxKind[SyntaxKind["FirstPunctuation"] = 15] = "FirstPunctuation";
-        SyntaxKind[SyntaxKind["LastPunctuation"] = 68] = "LastPunctuation";
+        SyntaxKind[SyntaxKind["FirstAssignment"] = 58] = "FirstAssignment";
+        SyntaxKind[SyntaxKind["LastAssignment"] = 70] = "LastAssignment";
+        SyntaxKind[SyntaxKind["FirstCompoundAssignment"] = 59] = "FirstCompoundAssignment";
+        SyntaxKind[SyntaxKind["LastCompoundAssignment"] = 70] = "LastCompoundAssignment";
+        SyntaxKind[SyntaxKind["FirstReservedWord"] = 72] = "FirstReservedWord";
+        SyntaxKind[SyntaxKind["LastReservedWord"] = 107] = "LastReservedWord";
+        SyntaxKind[SyntaxKind["FirstKeyword"] = 72] = "FirstKeyword";
+        SyntaxKind[SyntaxKind["LastKeyword"] = 142] = "LastKeyword";
+        SyntaxKind[SyntaxKind["FirstFutureReservedWord"] = 108] = "FirstFutureReservedWord";
+        SyntaxKind[SyntaxKind["LastFutureReservedWord"] = 116] = "LastFutureReservedWord";
+        SyntaxKind[SyntaxKind["FirstTypeNode"] = 158] = "FirstTypeNode";
+        SyntaxKind[SyntaxKind["LastTypeNode"] = 173] = "LastTypeNode";
+        SyntaxKind[SyntaxKind["FirstPunctuation"] = 17] = "FirstPunctuation";
+        SyntaxKind[SyntaxKind["LastPunctuation"] = 70] = "LastPunctuation";
         SyntaxKind[SyntaxKind["FirstToken"] = 0] = "FirstToken";
-        SyntaxKind[SyntaxKind["LastToken"] = 138] = "LastToken";
+        SyntaxKind[SyntaxKind["LastToken"] = 142] = "LastToken";
         SyntaxKind[SyntaxKind["FirstTriviaToken"] = 2] = "FirstTriviaToken";
         SyntaxKind[SyntaxKind["LastTriviaToken"] = 7] = "LastTriviaToken";
         SyntaxKind[SyntaxKind["FirstLiteralToken"] = 8] = "FirstLiteralToken";
-        SyntaxKind[SyntaxKind["LastLiteralToken"] = 11] = "LastLiteralToken";
-        SyntaxKind[SyntaxKind["FirstTemplateToken"] = 11] = "FirstTemplateToken";
-        SyntaxKind[SyntaxKind["LastTemplateToken"] = 14] = "LastTemplateToken";
-        SyntaxKind[SyntaxKind["FirstBinaryOperator"] = 25] = "FirstBinaryOperator";
-        SyntaxKind[SyntaxKind["LastBinaryOperator"] = 68] = "LastBinaryOperator";
-        SyntaxKind[SyntaxKind["FirstNode"] = 139] = "FirstNode";
-        SyntaxKind[SyntaxKind["FirstJSDocNode"] = 257] = "FirstJSDocNode";
-        SyntaxKind[SyntaxKind["LastJSDocNode"] = 282] = "LastJSDocNode";
-        SyntaxKind[SyntaxKind["FirstJSDocTagNode"] = 273] = "FirstJSDocTagNode";
-        SyntaxKind[SyntaxKind["LastJSDocTagNode"] = 285] = "LastJSDocTagNode";
-    })(ts.SyntaxKind || (ts.SyntaxKind = {}));
-    var SyntaxKind = ts.SyntaxKind;
+        SyntaxKind[SyntaxKind["LastLiteralToken"] = 13] = "LastLiteralToken";
+        SyntaxKind[SyntaxKind["FirstTemplateToken"] = 13] = "FirstTemplateToken";
+        SyntaxKind[SyntaxKind["LastTemplateToken"] = 16] = "LastTemplateToken";
+        SyntaxKind[SyntaxKind["FirstBinaryOperator"] = 27] = "FirstBinaryOperator";
+        SyntaxKind[SyntaxKind["LastBinaryOperator"] = 70] = "LastBinaryOperator";
+        SyntaxKind[SyntaxKind["FirstNode"] = 143] = "FirstNode";
+        SyntaxKind[SyntaxKind["FirstJSDocNode"] = 267] = "FirstJSDocNode";
+        SyntaxKind[SyntaxKind["LastJSDocNode"] = 294] = "LastJSDocNode";
+        SyntaxKind[SyntaxKind["FirstJSDocTagNode"] = 284] = "FirstJSDocTagNode";
+        SyntaxKind[SyntaxKind["LastJSDocTagNode"] = 294] = "LastJSDocTagNode";
+    })(SyntaxKind = ts.SyntaxKind || (ts.SyntaxKind = {}));
+    var NodeFlags;
     (function (NodeFlags) {
         NodeFlags[NodeFlags["None"] = 0] = "None";
         NodeFlags[NodeFlags["Let"] = 1] = "Let";
@@ -374,29 +400,34 @@ var ts;
         NodeFlags[NodeFlags["HasImplicitReturn"] = 128] = "HasImplicitReturn";
         NodeFlags[NodeFlags["HasExplicitReturn"] = 256] = "HasExplicitReturn";
         NodeFlags[NodeFlags["GlobalAugmentation"] = 512] = "GlobalAugmentation";
-        NodeFlags[NodeFlags["HasClassExtends"] = 1024] = "HasClassExtends";
-        NodeFlags[NodeFlags["HasDecorators"] = 2048] = "HasDecorators";
-        NodeFlags[NodeFlags["HasParamDecorators"] = 4096] = "HasParamDecorators";
-        NodeFlags[NodeFlags["HasAsyncFunctions"] = 8192] = "HasAsyncFunctions";
-        NodeFlags[NodeFlags["HasJsxSpreadAttributes"] = 16384] = "HasJsxSpreadAttributes";
-        NodeFlags[NodeFlags["DisallowInContext"] = 32768] = "DisallowInContext";
-        NodeFlags[NodeFlags["YieldContext"] = 65536] = "YieldContext";
-        NodeFlags[NodeFlags["DecoratorContext"] = 131072] = "DecoratorContext";
-        NodeFlags[NodeFlags["AwaitContext"] = 262144] = "AwaitContext";
-        NodeFlags[NodeFlags["ThisNodeHasError"] = 524288] = "ThisNodeHasError";
-        NodeFlags[NodeFlags["JavaScriptFile"] = 1048576] = "JavaScriptFile";
-        NodeFlags[NodeFlags["ThisNodeOrAnySubNodesHasError"] = 2097152] = "ThisNodeOrAnySubNodesHasError";
-        NodeFlags[NodeFlags["HasAggregatedChildData"] = 4194304] = "HasAggregatedChildData";
+        NodeFlags[NodeFlags["HasAsyncFunctions"] = 1024] = "HasAsyncFunctions";
+        NodeFlags[NodeFlags["DisallowInContext"] = 2048] = "DisallowInContext";
+        NodeFlags[NodeFlags["YieldContext"] = 4096] = "YieldContext";
+        NodeFlags[NodeFlags["DecoratorContext"] = 8192] = "DecoratorContext";
+        NodeFlags[NodeFlags["AwaitContext"] = 16384] = "AwaitContext";
+        NodeFlags[NodeFlags["ThisNodeHasError"] = 32768] = "ThisNodeHasError";
+        NodeFlags[NodeFlags["JavaScriptFile"] = 65536] = "JavaScriptFile";
+        NodeFlags[NodeFlags["ThisNodeOrAnySubNodesHasError"] = 131072] = "ThisNodeOrAnySubNodesHasError";
+        NodeFlags[NodeFlags["HasAggregatedChildData"] = 262144] = "HasAggregatedChildData";
+        // This flag will be set when the parser encounters a dynamic import expression so that module resolution
+        // will not have to walk the tree if the flag is not set. However, this flag is just a approximation because
+        // once it is set, the flag never gets cleared (hence why it's named "PossiblyContainsDynamicImport").
+        // During editing, if dynamic import is removed, incremental parsing will *NOT* update this flag. This means that the tree will always be traversed
+        // during module resolution. However, the removal operation should not occur often and in the case of the
+        // removal, it is likely that users will add the import anyway.
+        // The advantage of this approach is its simplicity. For the case of batch compilation,
+        // we guarantee that users won't have to pay the price of walking the tree if a dynamic import isn't used.
+        /* @internal */
+        NodeFlags[NodeFlags["PossiblyContainsDynamicImport"] = 524288] = "PossiblyContainsDynamicImport";
         NodeFlags[NodeFlags["BlockScoped"] = 3] = "BlockScoped";
         NodeFlags[NodeFlags["ReachabilityCheckFlags"] = 384] = "ReachabilityCheckFlags";
-        NodeFlags[NodeFlags["EmitHelperFlags"] = 31744] = "EmitHelperFlags";
-        NodeFlags[NodeFlags["ReachabilityAndEmitFlags"] = 32128] = "ReachabilityAndEmitFlags";
+        NodeFlags[NodeFlags["ReachabilityAndEmitFlags"] = 1408] = "ReachabilityAndEmitFlags";
         // Parsing context flags
-        NodeFlags[NodeFlags["ContextFlags"] = 1540096] = "ContextFlags";
+        NodeFlags[NodeFlags["ContextFlags"] = 96256] = "ContextFlags";
         // Exclude these flags when parsing a Type
-        NodeFlags[NodeFlags["TypeExcludesFlags"] = 327680] = "TypeExcludesFlags";
-    })(ts.NodeFlags || (ts.NodeFlags = {}));
-    var NodeFlags = ts.NodeFlags;
+        NodeFlags[NodeFlags["TypeExcludesFlags"] = 20480] = "TypeExcludesFlags";
+    })(NodeFlags = ts.NodeFlags || (ts.NodeFlags = {}));
+    var ModifierFlags;
     (function (ModifierFlags) {
         ModifierFlags[ModifierFlags["None"] = 0] = "None";
         ModifierFlags[ModifierFlags["Export"] = 1] = "Export";
@@ -415,8 +446,10 @@ var ts;
         // Accessibility modifiers and 'readonly' can be attached to a parameter in a constructor to make it a property.
         ModifierFlags[ModifierFlags["ParameterPropertyModifier"] = 92] = "ParameterPropertyModifier";
         ModifierFlags[ModifierFlags["NonPublicAccessibilityModifier"] = 24] = "NonPublicAccessibilityModifier";
-    })(ts.ModifierFlags || (ts.ModifierFlags = {}));
-    var ModifierFlags = ts.ModifierFlags;
+        ModifierFlags[ModifierFlags["TypeScriptModifier"] = 2270] = "TypeScriptModifier";
+        ModifierFlags[ModifierFlags["ExportDefault"] = 513] = "ExportDefault";
+    })(ModifierFlags = ts.ModifierFlags || (ts.ModifierFlags = {}));
+    var JsxFlags;
     (function (JsxFlags) {
         JsxFlags[JsxFlags["None"] = 0] = "None";
         /** An element from a named property of the JSX.IntrinsicElements interface */
@@ -424,24 +457,35 @@ var ts;
         /** An element inferred from the string index signature of the JSX.IntrinsicElements interface */
         JsxFlags[JsxFlags["IntrinsicIndexedElement"] = 2] = "IntrinsicIndexedElement";
         JsxFlags[JsxFlags["IntrinsicElement"] = 3] = "IntrinsicElement";
-    })(ts.JsxFlags || (ts.JsxFlags = {}));
-    var JsxFlags = ts.JsxFlags;
+    })(JsxFlags = ts.JsxFlags || (ts.JsxFlags = {}));
     /* @internal */
+    var RelationComparisonResult;
     (function (RelationComparisonResult) {
         RelationComparisonResult[RelationComparisonResult["Succeeded"] = 1] = "Succeeded";
         RelationComparisonResult[RelationComparisonResult["Failed"] = 2] = "Failed";
         RelationComparisonResult[RelationComparisonResult["FailedAndReported"] = 3] = "FailedAndReported";
-    })(ts.RelationComparisonResult || (ts.RelationComparisonResult = {}));
-    var RelationComparisonResult = ts.RelationComparisonResult;
+    })(RelationComparisonResult = ts.RelationComparisonResult || (ts.RelationComparisonResult = {}));
     /*@internal*/
+    var GeneratedIdentifierKind;
     (function (GeneratedIdentifierKind) {
         GeneratedIdentifierKind[GeneratedIdentifierKind["None"] = 0] = "None";
         GeneratedIdentifierKind[GeneratedIdentifierKind["Auto"] = 1] = "Auto";
         GeneratedIdentifierKind[GeneratedIdentifierKind["Loop"] = 2] = "Loop";
         GeneratedIdentifierKind[GeneratedIdentifierKind["Unique"] = 3] = "Unique";
         GeneratedIdentifierKind[GeneratedIdentifierKind["Node"] = 4] = "Node";
-    })(ts.GeneratedIdentifierKind || (ts.GeneratedIdentifierKind = {}));
-    var GeneratedIdentifierKind = ts.GeneratedIdentifierKind;
+    })(GeneratedIdentifierKind = ts.GeneratedIdentifierKind || (ts.GeneratedIdentifierKind = {}));
+    /* @internal */
+    var NumericLiteralFlags;
+    (function (NumericLiteralFlags) {
+        NumericLiteralFlags[NumericLiteralFlags["None"] = 0] = "None";
+        NumericLiteralFlags[NumericLiteralFlags["Scientific"] = 2] = "Scientific";
+        NumericLiteralFlags[NumericLiteralFlags["Octal"] = 4] = "Octal";
+        NumericLiteralFlags[NumericLiteralFlags["HexSpecifier"] = 8] = "HexSpecifier";
+        NumericLiteralFlags[NumericLiteralFlags["BinarySpecifier"] = 16] = "BinarySpecifier";
+        NumericLiteralFlags[NumericLiteralFlags["OctalSpecifier"] = 32] = "OctalSpecifier";
+        NumericLiteralFlags[NumericLiteralFlags["BinaryOrOctalSpecifier"] = 48] = "BinaryOrOctalSpecifier";
+    })(NumericLiteralFlags = ts.NumericLiteralFlags || (ts.NumericLiteralFlags = {}));
+    var FlowFlags;
     (function (FlowFlags) {
         FlowFlags[FlowFlags["Unreachable"] = 1] = "Unreachable";
         FlowFlags[FlowFlags["Start"] = 2] = "Start";
@@ -451,19 +495,29 @@ var ts;
         FlowFlags[FlowFlags["TrueCondition"] = 32] = "TrueCondition";
         FlowFlags[FlowFlags["FalseCondition"] = 64] = "FalseCondition";
         FlowFlags[FlowFlags["SwitchClause"] = 128] = "SwitchClause";
-        FlowFlags[FlowFlags["Referenced"] = 256] = "Referenced";
-        FlowFlags[FlowFlags["Shared"] = 512] = "Shared";
+        FlowFlags[FlowFlags["ArrayMutation"] = 256] = "ArrayMutation";
+        FlowFlags[FlowFlags["Referenced"] = 512] = "Referenced";
+        FlowFlags[FlowFlags["Shared"] = 1024] = "Shared";
+        FlowFlags[FlowFlags["PreFinally"] = 2048] = "PreFinally";
+        FlowFlags[FlowFlags["AfterFinally"] = 4096] = "AfterFinally";
         FlowFlags[FlowFlags["Label"] = 12] = "Label";
         FlowFlags[FlowFlags["Condition"] = 96] = "Condition";
-    })(ts.FlowFlags || (ts.FlowFlags = {}));
-    var FlowFlags = ts.FlowFlags;
+    })(FlowFlags = ts.FlowFlags || (ts.FlowFlags = {}));
     var OperationCanceledException = (function () {
         function OperationCanceledException() {
         }
         return OperationCanceledException;
     }());
     ts.OperationCanceledException = OperationCanceledException;
+    /* @internal */
+    var StructureIsReused;
+    (function (StructureIsReused) {
+        StructureIsReused[StructureIsReused["Not"] = 0] = "Not";
+        StructureIsReused[StructureIsReused["SafeModules"] = 1] = "SafeModules";
+        StructureIsReused[StructureIsReused["Completely"] = 2] = "Completely";
+    })(StructureIsReused = ts.StructureIsReused || (ts.StructureIsReused = {}));
     /** Return code used by getEmitOutput function to indicate status of the function */
+    var ExitStatus;
     (function (ExitStatus) {
         // Compiler ran successfully.  Either this was a simple do-nothing compilation (for example,
         // when -version or -help was provided, or this was a normal compilation, no diagnostics
@@ -473,23 +527,47 @@ var ts;
         ExitStatus[ExitStatus["DiagnosticsPresent_OutputsSkipped"] = 1] = "DiagnosticsPresent_OutputsSkipped";
         // Diagnostics were produced and outputs were generated in spite of them.
         ExitStatus[ExitStatus["DiagnosticsPresent_OutputsGenerated"] = 2] = "DiagnosticsPresent_OutputsGenerated";
-    })(ts.ExitStatus || (ts.ExitStatus = {}));
-    var ExitStatus = ts.ExitStatus;
+    })(ExitStatus = ts.ExitStatus || (ts.ExitStatus = {}));
+    var NodeBuilderFlags;
+    (function (NodeBuilderFlags) {
+        NodeBuilderFlags[NodeBuilderFlags["None"] = 0] = "None";
+        // Options
+        NodeBuilderFlags[NodeBuilderFlags["NoTruncation"] = 1] = "NoTruncation";
+        NodeBuilderFlags[NodeBuilderFlags["WriteArrayAsGenericType"] = 2] = "WriteArrayAsGenericType";
+        NodeBuilderFlags[NodeBuilderFlags["WriteTypeArgumentsOfSignature"] = 32] = "WriteTypeArgumentsOfSignature";
+        NodeBuilderFlags[NodeBuilderFlags["UseFullyQualifiedType"] = 64] = "UseFullyQualifiedType";
+        NodeBuilderFlags[NodeBuilderFlags["SuppressAnyReturnType"] = 256] = "SuppressAnyReturnType";
+        NodeBuilderFlags[NodeBuilderFlags["WriteTypeParametersInQualifiedName"] = 512] = "WriteTypeParametersInQualifiedName";
+        // Error handling
+        NodeBuilderFlags[NodeBuilderFlags["AllowThisInObjectLiteral"] = 1024] = "AllowThisInObjectLiteral";
+        NodeBuilderFlags[NodeBuilderFlags["AllowQualifedNameInPlaceOfIdentifier"] = 2048] = "AllowQualifedNameInPlaceOfIdentifier";
+        NodeBuilderFlags[NodeBuilderFlags["AllowAnonymousIdentifier"] = 8192] = "AllowAnonymousIdentifier";
+        NodeBuilderFlags[NodeBuilderFlags["AllowEmptyUnionOrIntersection"] = 16384] = "AllowEmptyUnionOrIntersection";
+        NodeBuilderFlags[NodeBuilderFlags["AllowEmptyTuple"] = 32768] = "AllowEmptyTuple";
+        NodeBuilderFlags[NodeBuilderFlags["IgnoreErrors"] = 60416] = "IgnoreErrors";
+        // State
+        NodeBuilderFlags[NodeBuilderFlags["InObjectTypeLiteral"] = 1048576] = "InObjectTypeLiteral";
+        NodeBuilderFlags[NodeBuilderFlags["InTypeAlias"] = 8388608] = "InTypeAlias";
+    })(NodeBuilderFlags = ts.NodeBuilderFlags || (ts.NodeBuilderFlags = {}));
+    var TypeFormatFlags;
     (function (TypeFormatFlags) {
         TypeFormatFlags[TypeFormatFlags["None"] = 0] = "None";
         TypeFormatFlags[TypeFormatFlags["WriteArrayAsGenericType"] = 1] = "WriteArrayAsGenericType";
-        TypeFormatFlags[TypeFormatFlags["UseTypeOfFunction"] = 2] = "UseTypeOfFunction";
-        TypeFormatFlags[TypeFormatFlags["NoTruncation"] = 4] = "NoTruncation";
-        TypeFormatFlags[TypeFormatFlags["WriteArrowStyleSignature"] = 8] = "WriteArrowStyleSignature";
-        TypeFormatFlags[TypeFormatFlags["WriteOwnNameForAnyLike"] = 16] = "WriteOwnNameForAnyLike";
-        TypeFormatFlags[TypeFormatFlags["WriteTypeArgumentsOfSignature"] = 32] = "WriteTypeArgumentsOfSignature";
-        TypeFormatFlags[TypeFormatFlags["InElementType"] = 64] = "InElementType";
-        TypeFormatFlags[TypeFormatFlags["UseFullyQualifiedType"] = 128] = "UseFullyQualifiedType";
-        TypeFormatFlags[TypeFormatFlags["InFirstTypeArgument"] = 256] = "InFirstTypeArgument";
-        TypeFormatFlags[TypeFormatFlags["InTypeAlias"] = 512] = "InTypeAlias";
-        TypeFormatFlags[TypeFormatFlags["UseTypeAliasValue"] = 1024] = "UseTypeAliasValue";
-    })(ts.TypeFormatFlags || (ts.TypeFormatFlags = {}));
-    var TypeFormatFlags = ts.TypeFormatFlags;
+        TypeFormatFlags[TypeFormatFlags["UseTypeOfFunction"] = 4] = "UseTypeOfFunction";
+        TypeFormatFlags[TypeFormatFlags["NoTruncation"] = 8] = "NoTruncation";
+        TypeFormatFlags[TypeFormatFlags["WriteArrowStyleSignature"] = 16] = "WriteArrowStyleSignature";
+        TypeFormatFlags[TypeFormatFlags["WriteOwnNameForAnyLike"] = 32] = "WriteOwnNameForAnyLike";
+        TypeFormatFlags[TypeFormatFlags["WriteTypeArgumentsOfSignature"] = 64] = "WriteTypeArgumentsOfSignature";
+        TypeFormatFlags[TypeFormatFlags["InElementType"] = 128] = "InElementType";
+        TypeFormatFlags[TypeFormatFlags["UseFullyQualifiedType"] = 256] = "UseFullyQualifiedType";
+        TypeFormatFlags[TypeFormatFlags["InFirstTypeArgument"] = 512] = "InFirstTypeArgument";
+        TypeFormatFlags[TypeFormatFlags["InTypeAlias"] = 1024] = "InTypeAlias";
+        TypeFormatFlags[TypeFormatFlags["UseTypeAliasValue"] = 2048] = "UseTypeAliasValue";
+        TypeFormatFlags[TypeFormatFlags["SuppressAnyReturnType"] = 4096] = "SuppressAnyReturnType";
+        TypeFormatFlags[TypeFormatFlags["AddUndefined"] = 8192] = "AddUndefined";
+        TypeFormatFlags[TypeFormatFlags["WriteClassExpressionAsTypeLiteral"] = 16384] = "WriteClassExpressionAsTypeLiteral";
+    })(TypeFormatFlags = ts.TypeFormatFlags || (ts.TypeFormatFlags = {}));
+    var SymbolFormatFlags;
     (function (SymbolFormatFlags) {
         SymbolFormatFlags[SymbolFormatFlags["None"] = 0] = "None";
         // Write symbols's type argument if it is instantiated symbol
@@ -501,23 +579,28 @@ var ts;
         // eg.  module m { export class c { } } import x = m.c;
         // When this flag is specified m.c will be used to refer to the class instead of alias symbol x
         SymbolFormatFlags[SymbolFormatFlags["UseOnlyExternalAliasing"] = 2] = "UseOnlyExternalAliasing";
-    })(ts.SymbolFormatFlags || (ts.SymbolFormatFlags = {}));
-    var SymbolFormatFlags = ts.SymbolFormatFlags;
+    })(SymbolFormatFlags = ts.SymbolFormatFlags || (ts.SymbolFormatFlags = {}));
     /* @internal */
+    var SymbolAccessibility;
     (function (SymbolAccessibility) {
         SymbolAccessibility[SymbolAccessibility["Accessible"] = 0] = "Accessible";
         SymbolAccessibility[SymbolAccessibility["NotAccessible"] = 1] = "NotAccessible";
         SymbolAccessibility[SymbolAccessibility["CannotBeNamed"] = 2] = "CannotBeNamed";
-    })(ts.SymbolAccessibility || (ts.SymbolAccessibility = {}));
-    var SymbolAccessibility = ts.SymbolAccessibility;
+    })(SymbolAccessibility = ts.SymbolAccessibility || (ts.SymbolAccessibility = {}));
+    /* @internal */
+    var SyntheticSymbolKind;
+    (function (SyntheticSymbolKind) {
+        SyntheticSymbolKind[SyntheticSymbolKind["UnionOrIntersection"] = 0] = "UnionOrIntersection";
+        SyntheticSymbolKind[SyntheticSymbolKind["Spread"] = 1] = "Spread";
+    })(SyntheticSymbolKind = ts.SyntheticSymbolKind || (ts.SyntheticSymbolKind = {}));
+    var TypePredicateKind;
     (function (TypePredicateKind) {
         TypePredicateKind[TypePredicateKind["This"] = 0] = "This";
         TypePredicateKind[TypePredicateKind["Identifier"] = 1] = "Identifier";
-    })(ts.TypePredicateKind || (ts.TypePredicateKind = {}));
-    var TypePredicateKind = ts.TypePredicateKind;
-    /** Indicates how to serialize the name for a TypeReferenceNode when emitting decorator
-      * metadata */
+    })(TypePredicateKind = ts.TypePredicateKind || (ts.TypePredicateKind = {}));
+    /** Indicates how to serialize the name for a TypeReferenceNode when emitting decorator metadata */
     /* @internal */
+    var TypeReferenceSerializationKind;
     (function (TypeReferenceSerializationKind) {
         TypeReferenceSerializationKind[TypeReferenceSerializationKind["Unknown"] = 0] = "Unknown";
         // should be emitted using a safe fallback.
@@ -535,8 +618,8 @@ var ts;
         TypeReferenceSerializationKind[TypeReferenceSerializationKind["TypeWithCallSignature"] = 9] = "TypeWithCallSignature";
         // with call signatures.
         TypeReferenceSerializationKind[TypeReferenceSerializationKind["ObjectType"] = 10] = "ObjectType";
-    })(ts.TypeReferenceSerializationKind || (ts.TypeReferenceSerializationKind = {}));
-    var TypeReferenceSerializationKind = ts.TypeReferenceSerializationKind;
+    })(TypeReferenceSerializationKind = ts.TypeReferenceSerializationKind || (ts.TypeReferenceSerializationKind = {}));
+    var SymbolFlags;
     (function (SymbolFlags) {
         SymbolFlags[SymbolFlags["None"] = 0] = "None";
         SymbolFlags[SymbolFlags["FunctionScopedVariable"] = 1] = "FunctionScopedVariable";
@@ -563,13 +646,10 @@ var ts;
         SymbolFlags[SymbolFlags["ExportType"] = 2097152] = "ExportType";
         SymbolFlags[SymbolFlags["ExportNamespace"] = 4194304] = "ExportNamespace";
         SymbolFlags[SymbolFlags["Alias"] = 8388608] = "Alias";
-        SymbolFlags[SymbolFlags["Instantiated"] = 16777216] = "Instantiated";
-        SymbolFlags[SymbolFlags["Merged"] = 33554432] = "Merged";
-        SymbolFlags[SymbolFlags["Transient"] = 67108864] = "Transient";
-        SymbolFlags[SymbolFlags["Prototype"] = 134217728] = "Prototype";
-        SymbolFlags[SymbolFlags["SyntheticProperty"] = 268435456] = "SyntheticProperty";
-        SymbolFlags[SymbolFlags["Optional"] = 536870912] = "Optional";
-        SymbolFlags[SymbolFlags["ExportStar"] = 1073741824] = "ExportStar";
+        SymbolFlags[SymbolFlags["Prototype"] = 16777216] = "Prototype";
+        SymbolFlags[SymbolFlags["ExportStar"] = 33554432] = "ExportStar";
+        SymbolFlags[SymbolFlags["Optional"] = 67108864] = "Optional";
+        SymbolFlags[SymbolFlags["Transient"] = 134217728] = "Transient";
         SymbolFlags[SymbolFlags["Enum"] = 384] = "Enum";
         SymbolFlags[SymbolFlags["Variable"] = 3] = "Variable";
         SymbolFlags[SymbolFlags["Value"] = 107455] = "Value";
@@ -611,13 +691,35 @@ var ts;
         // The set of things we consider semantically classifiable.  Used to speed up the LS during
         // classification.
         SymbolFlags[SymbolFlags["Classifiable"] = 788448] = "Classifiable";
-    })(ts.SymbolFlags || (ts.SymbolFlags = {}));
-    var SymbolFlags = ts.SymbolFlags;
+    })(SymbolFlags = ts.SymbolFlags || (ts.SymbolFlags = {}));
+    /* @internal */
+    var EnumKind;
+    (function (EnumKind) {
+        EnumKind[EnumKind["Numeric"] = 0] = "Numeric";
+        EnumKind[EnumKind["Literal"] = 1] = "Literal"; // Literal enum (each member has a TypeFlags.EnumLiteral type)
+    })(EnumKind = ts.EnumKind || (ts.EnumKind = {}));
     /* @internal */
+    var CheckFlags;
+    (function (CheckFlags) {
+        CheckFlags[CheckFlags["Instantiated"] = 1] = "Instantiated";
+        CheckFlags[CheckFlags["SyntheticProperty"] = 2] = "SyntheticProperty";
+        CheckFlags[CheckFlags["SyntheticMethod"] = 4] = "SyntheticMethod";
+        CheckFlags[CheckFlags["Readonly"] = 8] = "Readonly";
+        CheckFlags[CheckFlags["Partial"] = 16] = "Partial";
+        CheckFlags[CheckFlags["HasNonUniformType"] = 32] = "HasNonUniformType";
+        CheckFlags[CheckFlags["ContainsPublic"] = 64] = "ContainsPublic";
+        CheckFlags[CheckFlags["ContainsProtected"] = 128] = "ContainsProtected";
+        CheckFlags[CheckFlags["ContainsPrivate"] = 256] = "ContainsPrivate";
+        CheckFlags[CheckFlags["ContainsStatic"] = 512] = "ContainsStatic";
+        CheckFlags[CheckFlags["Synthetic"] = 6] = "Synthetic";
+    })(CheckFlags = ts.CheckFlags || (ts.CheckFlags = {}));
+    /* @internal */
+    var NodeCheckFlags;
     (function (NodeCheckFlags) {
         NodeCheckFlags[NodeCheckFlags["TypeChecked"] = 1] = "TypeChecked";
         NodeCheckFlags[NodeCheckFlags["LexicalThis"] = 2] = "LexicalThis";
         NodeCheckFlags[NodeCheckFlags["CaptureThis"] = 4] = "CaptureThis";
+        NodeCheckFlags[NodeCheckFlags["CaptureNewTarget"] = 8] = "CaptureNewTarget";
         NodeCheckFlags[NodeCheckFlags["SuperInstance"] = 256] = "SuperInstance";
         NodeCheckFlags[NodeCheckFlags["SuperStatic"] = 512] = "SuperStatic";
         NodeCheckFlags[NodeCheckFlags["ContextChecked"] = 1024] = "ContextChecked";
@@ -635,8 +737,8 @@ var ts;
         NodeCheckFlags[NodeCheckFlags["AssignmentsMarked"] = 4194304] = "AssignmentsMarked";
         NodeCheckFlags[NodeCheckFlags["ClassWithConstructorReference"] = 8388608] = "ClassWithConstructorReference";
         NodeCheckFlags[NodeCheckFlags["ConstructorReferenceInClass"] = 16777216] = "ConstructorReferenceInClass";
-    })(ts.NodeCheckFlags || (ts.NodeCheckFlags = {}));
-    var NodeCheckFlags = ts.NodeCheckFlags;
+    })(NodeCheckFlags = ts.NodeCheckFlags || (ts.NodeCheckFlags = {}));
+    var TypeFlags;
     (function (TypeFlags) {
         TypeFlags[TypeFlags["Any"] = 1] = "Any";
         TypeFlags[TypeFlags["String"] = 2] = "String";
@@ -653,66 +755,88 @@ var ts;
         TypeFlags[TypeFlags["Null"] = 4096] = "Null";
         TypeFlags[TypeFlags["Never"] = 8192] = "Never";
         TypeFlags[TypeFlags["TypeParameter"] = 16384] = "TypeParameter";
-        TypeFlags[TypeFlags["Class"] = 32768] = "Class";
-        TypeFlags[TypeFlags["Interface"] = 65536] = "Interface";
-        TypeFlags[TypeFlags["Reference"] = 131072] = "Reference";
-        TypeFlags[TypeFlags["Tuple"] = 262144] = "Tuple";
-        TypeFlags[TypeFlags["Union"] = 524288] = "Union";
-        TypeFlags[TypeFlags["Intersection"] = 1048576] = "Intersection";
-        TypeFlags[TypeFlags["Anonymous"] = 2097152] = "Anonymous";
-        TypeFlags[TypeFlags["Instantiated"] = 4194304] = "Instantiated";
+        TypeFlags[TypeFlags["Object"] = 32768] = "Object";
+        TypeFlags[TypeFlags["Union"] = 65536] = "Union";
+        TypeFlags[TypeFlags["Intersection"] = 131072] = "Intersection";
+        TypeFlags[TypeFlags["Index"] = 262144] = "Index";
+        TypeFlags[TypeFlags["IndexedAccess"] = 524288] = "IndexedAccess";
         /* @internal */
-        TypeFlags[TypeFlags["ObjectLiteral"] = 8388608] = "ObjectLiteral";
+        TypeFlags[TypeFlags["FreshLiteral"] = 1048576] = "FreshLiteral";
         /* @internal */
-        TypeFlags[TypeFlags["FreshLiteral"] = 16777216] = "FreshLiteral";
+        TypeFlags[TypeFlags["ContainsWideningType"] = 2097152] = "ContainsWideningType";
         /* @internal */
-        TypeFlags[TypeFlags["ContainsWideningType"] = 33554432] = "ContainsWideningType";
+        TypeFlags[TypeFlags["ContainsObjectLiteral"] = 4194304] = "ContainsObjectLiteral";
         /* @internal */
-        TypeFlags[TypeFlags["ContainsObjectLiteral"] = 67108864] = "ContainsObjectLiteral";
+        TypeFlags[TypeFlags["ContainsAnyFunctionType"] = 8388608] = "ContainsAnyFunctionType";
+        TypeFlags[TypeFlags["NonPrimitive"] = 16777216] = "NonPrimitive";
         /* @internal */
-        TypeFlags[TypeFlags["ContainsAnyFunctionType"] = 134217728] = "ContainsAnyFunctionType";
-        TypeFlags[TypeFlags["ThisType"] = 268435456] = "ThisType";
-        TypeFlags[TypeFlags["ObjectLiteralPatternWithComputedProperties"] = 536870912] = "ObjectLiteralPatternWithComputedProperties";
+        TypeFlags[TypeFlags["JsxAttributes"] = 33554432] = "JsxAttributes";
         /* @internal */
         TypeFlags[TypeFlags["Nullable"] = 6144] = "Nullable";
-        TypeFlags[TypeFlags["Literal"] = 480] = "Literal";
+        TypeFlags[TypeFlags["Literal"] = 224] = "Literal";
         TypeFlags[TypeFlags["StringOrNumberLiteral"] = 96] = "StringOrNumberLiteral";
         /* @internal */
         TypeFlags[TypeFlags["DefinitelyFalsy"] = 7392] = "DefinitelyFalsy";
         TypeFlags[TypeFlags["PossiblyFalsy"] = 7406] = "PossiblyFalsy";
         /* @internal */
-        TypeFlags[TypeFlags["Intrinsic"] = 16015] = "Intrinsic";
+        TypeFlags[TypeFlags["Intrinsic"] = 16793231] = "Intrinsic";
         /* @internal */
         TypeFlags[TypeFlags["Primitive"] = 8190] = "Primitive";
-        TypeFlags[TypeFlags["StringLike"] = 34] = "StringLike";
-        TypeFlags[TypeFlags["NumberLike"] = 340] = "NumberLike";
+        TypeFlags[TypeFlags["StringLike"] = 262178] = "StringLike";
+        TypeFlags[TypeFlags["NumberLike"] = 84] = "NumberLike";
         TypeFlags[TypeFlags["BooleanLike"] = 136] = "BooleanLike";
         TypeFlags[TypeFlags["EnumLike"] = 272] = "EnumLike";
-        TypeFlags[TypeFlags["ObjectType"] = 2588672] = "ObjectType";
-        TypeFlags[TypeFlags["UnionOrIntersection"] = 1572864] = "UnionOrIntersection";
-        TypeFlags[TypeFlags["StructuredType"] = 4161536] = "StructuredType";
-        TypeFlags[TypeFlags["StructuredOrTypeParameter"] = 4177920] = "StructuredOrTypeParameter";
+        TypeFlags[TypeFlags["UnionOrIntersection"] = 196608] = "UnionOrIntersection";
+        TypeFlags[TypeFlags["StructuredType"] = 229376] = "StructuredType";
+        TypeFlags[TypeFlags["StructuredOrTypeVariable"] = 1032192] = "StructuredOrTypeVariable";
+        TypeFlags[TypeFlags["TypeVariable"] = 540672] = "TypeVariable";
         // 'Narrowable' types are types where narrowing actually narrows.
         // This *should* be every type other than null, undefined, void, and never
-        TypeFlags[TypeFlags["Narrowable"] = 4178943] = "Narrowable";
-        TypeFlags[TypeFlags["NotUnionOrUnit"] = 2589191] = "NotUnionOrUnit";
+        TypeFlags[TypeFlags["Narrowable"] = 17810175] = "Narrowable";
+        TypeFlags[TypeFlags["NotUnionOrUnit"] = 16810497] = "NotUnionOrUnit";
         /* @internal */
-        TypeFlags[TypeFlags["RequiresWidening"] = 100663296] = "RequiresWidening";
+        TypeFlags[TypeFlags["RequiresWidening"] = 6291456] = "RequiresWidening";
         /* @internal */
-        TypeFlags[TypeFlags["PropagatingFlags"] = 234881024] = "PropagatingFlags";
-    })(ts.TypeFlags || (ts.TypeFlags = {}));
-    var TypeFlags = ts.TypeFlags;
+        TypeFlags[TypeFlags["PropagatingFlags"] = 14680064] = "PropagatingFlags";
+    })(TypeFlags = ts.TypeFlags || (ts.TypeFlags = {}));
+    var ObjectFlags;
+    (function (ObjectFlags) {
+        ObjectFlags[ObjectFlags["Class"] = 1] = "Class";
+        ObjectFlags[ObjectFlags["Interface"] = 2] = "Interface";
+        ObjectFlags[ObjectFlags["Reference"] = 4] = "Reference";
+        ObjectFlags[ObjectFlags["Tuple"] = 8] = "Tuple";
+        ObjectFlags[ObjectFlags["Anonymous"] = 16] = "Anonymous";
+        ObjectFlags[ObjectFlags["Mapped"] = 32] = "Mapped";
+        ObjectFlags[ObjectFlags["Instantiated"] = 64] = "Instantiated";
+        ObjectFlags[ObjectFlags["ObjectLiteral"] = 128] = "ObjectLiteral";
+        ObjectFlags[ObjectFlags["EvolvingArray"] = 256] = "EvolvingArray";
+        ObjectFlags[ObjectFlags["ObjectLiteralPatternWithComputedProperties"] = 512] = "ObjectLiteralPatternWithComputedProperties";
+        ObjectFlags[ObjectFlags["ClassOrInterface"] = 3] = "ClassOrInterface";
+    })(ObjectFlags = ts.ObjectFlags || (ts.ObjectFlags = {}));
+    var SignatureKind;
     (function (SignatureKind) {
         SignatureKind[SignatureKind["Call"] = 0] = "Call";
         SignatureKind[SignatureKind["Construct"] = 1] = "Construct";
-    })(ts.SignatureKind || (ts.SignatureKind = {}));
-    var SignatureKind = ts.SignatureKind;
+    })(SignatureKind = ts.SignatureKind || (ts.SignatureKind = {}));
+    var IndexKind;
     (function (IndexKind) {
         IndexKind[IndexKind["String"] = 0] = "String";
         IndexKind[IndexKind["Number"] = 1] = "Number";
-    })(ts.IndexKind || (ts.IndexKind = {}));
-    var IndexKind = ts.IndexKind;
+    })(IndexKind = ts.IndexKind || (ts.IndexKind = {}));
+    var InferencePriority;
+    (function (InferencePriority) {
+        InferencePriority[InferencePriority["NakedTypeVariable"] = 1] = "NakedTypeVariable";
+        InferencePriority[InferencePriority["MappedType"] = 2] = "MappedType";
+        InferencePriority[InferencePriority["ReturnType"] = 4] = "ReturnType";
+    })(InferencePriority = ts.InferencePriority || (ts.InferencePriority = {}));
+    var InferenceFlags;
+    (function (InferenceFlags) {
+        InferenceFlags[InferenceFlags["InferUnionTypes"] = 1] = "InferUnionTypes";
+        InferenceFlags[InferenceFlags["NoDefault"] = 2] = "NoDefault";
+        InferenceFlags[InferenceFlags["AnyDefault"] = 4] = "AnyDefault";
+    })(InferenceFlags = ts.InferenceFlags || (ts.InferenceFlags = {}));
     /* @internal */
+    var SpecialPropertyAssignmentKind;
     (function (SpecialPropertyAssignmentKind) {
         SpecialPropertyAssignmentKind[SpecialPropertyAssignmentKind["None"] = 0] = "None";
         /// exports.name = expr
@@ -723,73 +847,80 @@ var ts;
         SpecialPropertyAssignmentKind[SpecialPropertyAssignmentKind["PrototypeProperty"] = 3] = "PrototypeProperty";
         /// this.name = expr
         SpecialPropertyAssignmentKind[SpecialPropertyAssignmentKind["ThisProperty"] = 4] = "ThisProperty";
-    })(ts.SpecialPropertyAssignmentKind || (ts.SpecialPropertyAssignmentKind = {}));
-    var SpecialPropertyAssignmentKind = ts.SpecialPropertyAssignmentKind;
+        // F.name = expr
+        SpecialPropertyAssignmentKind[SpecialPropertyAssignmentKind["Property"] = 5] = "Property";
+    })(SpecialPropertyAssignmentKind = ts.SpecialPropertyAssignmentKind || (ts.SpecialPropertyAssignmentKind = {}));
+    var DiagnosticCategory;
     (function (DiagnosticCategory) {
         DiagnosticCategory[DiagnosticCategory["Warning"] = 0] = "Warning";
         DiagnosticCategory[DiagnosticCategory["Error"] = 1] = "Error";
         DiagnosticCategory[DiagnosticCategory["Message"] = 2] = "Message";
-    })(ts.DiagnosticCategory || (ts.DiagnosticCategory = {}));
-    var DiagnosticCategory = ts.DiagnosticCategory;
+    })(DiagnosticCategory = ts.DiagnosticCategory || (ts.DiagnosticCategory = {}));
+    var ModuleResolutionKind;
     (function (ModuleResolutionKind) {
         ModuleResolutionKind[ModuleResolutionKind["Classic"] = 1] = "Classic";
         ModuleResolutionKind[ModuleResolutionKind["NodeJs"] = 2] = "NodeJs";
-    })(ts.ModuleResolutionKind || (ts.ModuleResolutionKind = {}));
-    var ModuleResolutionKind = ts.ModuleResolutionKind;
+    })(ModuleResolutionKind = ts.ModuleResolutionKind || (ts.ModuleResolutionKind = {}));
+    var ModuleKind;
     (function (ModuleKind) {
         ModuleKind[ModuleKind["None"] = 0] = "None";
         ModuleKind[ModuleKind["CommonJS"] = 1] = "CommonJS";
         ModuleKind[ModuleKind["AMD"] = 2] = "AMD";
         ModuleKind[ModuleKind["UMD"] = 3] = "UMD";
         ModuleKind[ModuleKind["System"] = 4] = "System";
-        ModuleKind[ModuleKind["ES6"] = 5] = "ES6";
         ModuleKind[ModuleKind["ES2015"] = 5] = "ES2015";
-    })(ts.ModuleKind || (ts.ModuleKind = {}));
-    var ModuleKind = ts.ModuleKind;
+        ModuleKind[ModuleKind["ESNext"] = 6] = "ESNext";
+    })(ModuleKind = ts.ModuleKind || (ts.ModuleKind = {}));
+    var JsxEmit;
     (function (JsxEmit) {
         JsxEmit[JsxEmit["None"] = 0] = "None";
         JsxEmit[JsxEmit["Preserve"] = 1] = "Preserve";
         JsxEmit[JsxEmit["React"] = 2] = "React";
-    })(ts.JsxEmit || (ts.JsxEmit = {}));
-    var JsxEmit = ts.JsxEmit;
+        JsxEmit[JsxEmit["ReactNative"] = 3] = "ReactNative";
+    })(JsxEmit = ts.JsxEmit || (ts.JsxEmit = {}));
+    var NewLineKind;
     (function (NewLineKind) {
         NewLineKind[NewLineKind["CarriageReturnLineFeed"] = 0] = "CarriageReturnLineFeed";
         NewLineKind[NewLineKind["LineFeed"] = 1] = "LineFeed";
-    })(ts.NewLineKind || (ts.NewLineKind = {}));
-    var NewLineKind = ts.NewLineKind;
+    })(NewLineKind = ts.NewLineKind || (ts.NewLineKind = {}));
+    var ScriptKind;
     (function (ScriptKind) {
         ScriptKind[ScriptKind["Unknown"] = 0] = "Unknown";
         ScriptKind[ScriptKind["JS"] = 1] = "JS";
         ScriptKind[ScriptKind["JSX"] = 2] = "JSX";
         ScriptKind[ScriptKind["TS"] = 3] = "TS";
         ScriptKind[ScriptKind["TSX"] = 4] = "TSX";
-    })(ts.ScriptKind || (ts.ScriptKind = {}));
-    var ScriptKind = ts.ScriptKind;
+        ScriptKind[ScriptKind["External"] = 5] = "External";
+        ScriptKind[ScriptKind["JSON"] = 6] = "JSON";
+    })(ScriptKind = ts.ScriptKind || (ts.ScriptKind = {}));
+    var ScriptTarget;
     (function (ScriptTarget) {
         ScriptTarget[ScriptTarget["ES3"] = 0] = "ES3";
         ScriptTarget[ScriptTarget["ES5"] = 1] = "ES5";
-        ScriptTarget[ScriptTarget["ES6"] = 2] = "ES6";
         ScriptTarget[ScriptTarget["ES2015"] = 2] = "ES2015";
-        ScriptTarget[ScriptTarget["Latest"] = 2] = "Latest";
-    })(ts.ScriptTarget || (ts.ScriptTarget = {}));
-    var ScriptTarget = ts.ScriptTarget;
+        ScriptTarget[ScriptTarget["ES2016"] = 3] = "ES2016";
+        ScriptTarget[ScriptTarget["ES2017"] = 4] = "ES2017";
+        ScriptTarget[ScriptTarget["ESNext"] = 5] = "ESNext";
+        ScriptTarget[ScriptTarget["Latest"] = 5] = "Latest";
+    })(ScriptTarget = ts.ScriptTarget || (ts.ScriptTarget = {}));
+    var LanguageVariant;
     (function (LanguageVariant) {
         LanguageVariant[LanguageVariant["Standard"] = 0] = "Standard";
         LanguageVariant[LanguageVariant["JSX"] = 1] = "JSX";
-    })(ts.LanguageVariant || (ts.LanguageVariant = {}));
-    var LanguageVariant = ts.LanguageVariant;
+    })(LanguageVariant = ts.LanguageVariant || (ts.LanguageVariant = {}));
     /* @internal */
+    var DiagnosticStyle;
     (function (DiagnosticStyle) {
         DiagnosticStyle[DiagnosticStyle["Simple"] = 0] = "Simple";
         DiagnosticStyle[DiagnosticStyle["Pretty"] = 1] = "Pretty";
-    })(ts.DiagnosticStyle || (ts.DiagnosticStyle = {}));
-    var DiagnosticStyle = ts.DiagnosticStyle;
+    })(DiagnosticStyle = ts.DiagnosticStyle || (ts.DiagnosticStyle = {}));
+    var WatchDirectoryFlags;
     (function (WatchDirectoryFlags) {
         WatchDirectoryFlags[WatchDirectoryFlags["None"] = 0] = "None";
         WatchDirectoryFlags[WatchDirectoryFlags["Recursive"] = 1] = "Recursive";
-    })(ts.WatchDirectoryFlags || (ts.WatchDirectoryFlags = {}));
-    var WatchDirectoryFlags = ts.WatchDirectoryFlags;
+    })(WatchDirectoryFlags = ts.WatchDirectoryFlags || (ts.WatchDirectoryFlags = {}));
     /* @internal */
+    var CharacterCodes;
     (function (CharacterCodes) {
         CharacterCodes[CharacterCodes["nullCharacter"] = 0] = "nullCharacter";
         CharacterCodes[CharacterCodes["maxAsciiCharacter"] = 127] = "maxAsciiCharacter";
@@ -916,107 +1047,162 @@ var ts;
         CharacterCodes[CharacterCodes["byteOrderMark"] = 65279] = "byteOrderMark";
         CharacterCodes[CharacterCodes["tab"] = 9] = "tab";
         CharacterCodes[CharacterCodes["verticalTab"] = 11] = "verticalTab";
-    })(ts.CharacterCodes || (ts.CharacterCodes = {}));
-    var CharacterCodes = ts.CharacterCodes;
+    })(CharacterCodes = ts.CharacterCodes || (ts.CharacterCodes = {}));
+    var Extension;
+    (function (Extension) {
+        Extension["Ts"] = ".ts";
+        Extension["Tsx"] = ".tsx";
+        Extension["Dts"] = ".d.ts";
+        Extension["Js"] = ".js";
+        Extension["Jsx"] = ".jsx";
+    })(Extension = ts.Extension || (ts.Extension = {}));
     /* @internal */
+    var TransformFlags;
     (function (TransformFlags) {
         TransformFlags[TransformFlags["None"] = 0] = "None";
         // Facts
         // - Flags used to indicate that a node or subtree contains syntax that requires transformation.
         TransformFlags[TransformFlags["TypeScript"] = 1] = "TypeScript";
         TransformFlags[TransformFlags["ContainsTypeScript"] = 2] = "ContainsTypeScript";
-        TransformFlags[TransformFlags["Jsx"] = 4] = "Jsx";
-        TransformFlags[TransformFlags["ContainsJsx"] = 8] = "ContainsJsx";
-        TransformFlags[TransformFlags["ES7"] = 16] = "ES7";
-        TransformFlags[TransformFlags["ContainsES7"] = 32] = "ContainsES7";
-        TransformFlags[TransformFlags["ES6"] = 64] = "ES6";
-        TransformFlags[TransformFlags["ContainsES6"] = 128] = "ContainsES6";
-        TransformFlags[TransformFlags["DestructuringAssignment"] = 256] = "DestructuringAssignment";
-        TransformFlags[TransformFlags["Generator"] = 512] = "Generator";
-        TransformFlags[TransformFlags["ContainsGenerator"] = 1024] = "ContainsGenerator";
+        TransformFlags[TransformFlags["ContainsJsx"] = 4] = "ContainsJsx";
+        TransformFlags[TransformFlags["ContainsESNext"] = 8] = "ContainsESNext";
+        TransformFlags[TransformFlags["ContainsES2017"] = 16] = "ContainsES2017";
+        TransformFlags[TransformFlags["ContainsES2016"] = 32] = "ContainsES2016";
+        TransformFlags[TransformFlags["ES2015"] = 64] = "ES2015";
+        TransformFlags[TransformFlags["ContainsES2015"] = 128] = "ContainsES2015";
+        TransformFlags[TransformFlags["Generator"] = 256] = "Generator";
+        TransformFlags[TransformFlags["ContainsGenerator"] = 512] = "ContainsGenerator";
+        TransformFlags[TransformFlags["DestructuringAssignment"] = 1024] = "DestructuringAssignment";
+        TransformFlags[TransformFlags["ContainsDestructuringAssignment"] = 2048] = "ContainsDestructuringAssignment";
         // Markers
         // - Flags used to indicate that a subtree contains a specific transformation.
-        TransformFlags[TransformFlags["ContainsDecorators"] = 2048] = "ContainsDecorators";
-        TransformFlags[TransformFlags["ContainsPropertyInitializer"] = 4096] = "ContainsPropertyInitializer";
-        TransformFlags[TransformFlags["ContainsLexicalThis"] = 8192] = "ContainsLexicalThis";
-        TransformFlags[TransformFlags["ContainsCapturedLexicalThis"] = 16384] = "ContainsCapturedLexicalThis";
-        TransformFlags[TransformFlags["ContainsLexicalThisInComputedPropertyName"] = 32768] = "ContainsLexicalThisInComputedPropertyName";
-        TransformFlags[TransformFlags["ContainsDefaultValueAssignments"] = 65536] = "ContainsDefaultValueAssignments";
-        TransformFlags[TransformFlags["ContainsParameterPropertyAssignments"] = 131072] = "ContainsParameterPropertyAssignments";
-        TransformFlags[TransformFlags["ContainsSpreadElementExpression"] = 262144] = "ContainsSpreadElementExpression";
-        TransformFlags[TransformFlags["ContainsComputedPropertyName"] = 524288] = "ContainsComputedPropertyName";
-        TransformFlags[TransformFlags["ContainsBlockScopedBinding"] = 1048576] = "ContainsBlockScopedBinding";
-        TransformFlags[TransformFlags["ContainsBindingPattern"] = 2097152] = "ContainsBindingPattern";
-        TransformFlags[TransformFlags["ContainsYield"] = 4194304] = "ContainsYield";
-        TransformFlags[TransformFlags["ContainsHoistedDeclarationOrCompletion"] = 8388608] = "ContainsHoistedDeclarationOrCompletion";
+        TransformFlags[TransformFlags["ContainsDecorators"] = 4096] = "ContainsDecorators";
+        TransformFlags[TransformFlags["ContainsPropertyInitializer"] = 8192] = "ContainsPropertyInitializer";
+        TransformFlags[TransformFlags["ContainsLexicalThis"] = 16384] = "ContainsLexicalThis";
+        TransformFlags[TransformFlags["ContainsCapturedLexicalThis"] = 32768] = "ContainsCapturedLexicalThis";
+        TransformFlags[TransformFlags["ContainsLexicalThisInComputedPropertyName"] = 65536] = "ContainsLexicalThisInComputedPropertyName";
+        TransformFlags[TransformFlags["ContainsDefaultValueAssignments"] = 131072] = "ContainsDefaultValueAssignments";
+        TransformFlags[TransformFlags["ContainsParameterPropertyAssignments"] = 262144] = "ContainsParameterPropertyAssignments";
+        TransformFlags[TransformFlags["ContainsSpread"] = 524288] = "ContainsSpread";
+        TransformFlags[TransformFlags["ContainsObjectSpread"] = 1048576] = "ContainsObjectSpread";
+        TransformFlags[TransformFlags["ContainsRest"] = 524288] = "ContainsRest";
+        TransformFlags[TransformFlags["ContainsObjectRest"] = 1048576] = "ContainsObjectRest";
+        TransformFlags[TransformFlags["ContainsComputedPropertyName"] = 2097152] = "ContainsComputedPropertyName";
+        TransformFlags[TransformFlags["ContainsBlockScopedBinding"] = 4194304] = "ContainsBlockScopedBinding";
+        TransformFlags[TransformFlags["ContainsBindingPattern"] = 8388608] = "ContainsBindingPattern";
+        TransformFlags[TransformFlags["ContainsYield"] = 16777216] = "ContainsYield";
+        TransformFlags[TransformFlags["ContainsHoistedDeclarationOrCompletion"] = 33554432] = "ContainsHoistedDeclarationOrCompletion";
+        TransformFlags[TransformFlags["ContainsDynamicImport"] = 67108864] = "ContainsDynamicImport";
+        // Please leave this as 1 << 29.
+        // It is the maximum bit we can set before we outgrow the size of a v8 small integer (SMI) on an x86 system.
+        // It is a good reminder of how much room we have left
         TransformFlags[TransformFlags["HasComputedFlags"] = 536870912] = "HasComputedFlags";
         // Assertions
         // - Bitmasks that are used to assert facts about the syntax of a node and its subtree.
         TransformFlags[TransformFlags["AssertTypeScript"] = 3] = "AssertTypeScript";
-        TransformFlags[TransformFlags["AssertJsx"] = 12] = "AssertJsx";
-        TransformFlags[TransformFlags["AssertES7"] = 48] = "AssertES7";
-        TransformFlags[TransformFlags["AssertES6"] = 192] = "AssertES6";
-        TransformFlags[TransformFlags["AssertGenerator"] = 1536] = "AssertGenerator";
+        TransformFlags[TransformFlags["AssertJsx"] = 4] = "AssertJsx";
+        TransformFlags[TransformFlags["AssertESNext"] = 8] = "AssertESNext";
+        TransformFlags[TransformFlags["AssertES2017"] = 16] = "AssertES2017";
+        TransformFlags[TransformFlags["AssertES2016"] = 32] = "AssertES2016";
+        TransformFlags[TransformFlags["AssertES2015"] = 192] = "AssertES2015";
+        TransformFlags[TransformFlags["AssertGenerator"] = 768] = "AssertGenerator";
+        TransformFlags[TransformFlags["AssertDestructuringAssignment"] = 3072] = "AssertDestructuringAssignment";
         // Scope Exclusions
         // - Bitmasks that exclude flags from propagating out of a specific context
         //   into the subtree flags of their container.
-        TransformFlags[TransformFlags["NodeExcludes"] = 536871765] = "NodeExcludes";
-        TransformFlags[TransformFlags["ArrowFunctionExcludes"] = 550710101] = "ArrowFunctionExcludes";
-        TransformFlags[TransformFlags["FunctionExcludes"] = 550726485] = "FunctionExcludes";
-        TransformFlags[TransformFlags["ConstructorExcludes"] = 550593365] = "ConstructorExcludes";
-        TransformFlags[TransformFlags["MethodOrAccessorExcludes"] = 550593365] = "MethodOrAccessorExcludes";
-        TransformFlags[TransformFlags["ClassExcludes"] = 537590613] = "ClassExcludes";
-        TransformFlags[TransformFlags["ModuleExcludes"] = 546335573] = "ModuleExcludes";
+        TransformFlags[TransformFlags["NodeExcludes"] = 536872257] = "NodeExcludes";
+        TransformFlags[TransformFlags["ArrowFunctionExcludes"] = 601249089] = "ArrowFunctionExcludes";
+        TransformFlags[TransformFlags["FunctionExcludes"] = 601281857] = "FunctionExcludes";
+        TransformFlags[TransformFlags["ConstructorExcludes"] = 601015617] = "ConstructorExcludes";
+        TransformFlags[TransformFlags["MethodOrAccessorExcludes"] = 601015617] = "MethodOrAccessorExcludes";
+        TransformFlags[TransformFlags["ClassExcludes"] = 539358529] = "ClassExcludes";
+        TransformFlags[TransformFlags["ModuleExcludes"] = 574674241] = "ModuleExcludes";
         TransformFlags[TransformFlags["TypeExcludes"] = -3] = "TypeExcludes";
-        TransformFlags[TransformFlags["ObjectLiteralExcludes"] = 537430869] = "ObjectLiteralExcludes";
-        TransformFlags[TransformFlags["ArrayLiteralOrCallOrNewExcludes"] = 537133909] = "ArrayLiteralOrCallOrNewExcludes";
-        TransformFlags[TransformFlags["VariableDeclarationListExcludes"] = 538968917] = "VariableDeclarationListExcludes";
-        TransformFlags[TransformFlags["ParameterExcludes"] = 538968917] = "ParameterExcludes";
+        TransformFlags[TransformFlags["ObjectLiteralExcludes"] = 540087617] = "ObjectLiteralExcludes";
+        TransformFlags[TransformFlags["ArrayLiteralOrCallOrNewExcludes"] = 537396545] = "ArrayLiteralOrCallOrNewExcludes";
+        TransformFlags[TransformFlags["VariableDeclarationListExcludes"] = 546309441] = "VariableDeclarationListExcludes";
+        TransformFlags[TransformFlags["ParameterExcludes"] = 536872257] = "ParameterExcludes";
+        TransformFlags[TransformFlags["CatchClauseExcludes"] = 537920833] = "CatchClauseExcludes";
+        TransformFlags[TransformFlags["BindingPatternExcludes"] = 537396545] = "BindingPatternExcludes";
         // Masks
         // - Additional bitmasks
-        TransformFlags[TransformFlags["TypeScriptClassSyntaxMask"] = 137216] = "TypeScriptClassSyntaxMask";
-        TransformFlags[TransformFlags["ES6FunctionSyntaxMask"] = 81920] = "ES6FunctionSyntaxMask";
-    })(ts.TransformFlags || (ts.TransformFlags = {}));
-    var TransformFlags = ts.TransformFlags;
-    /* @internal */
+        TransformFlags[TransformFlags["TypeScriptClassSyntaxMask"] = 274432] = "TypeScriptClassSyntaxMask";
+        TransformFlags[TransformFlags["ES2015FunctionSyntaxMask"] = 163840] = "ES2015FunctionSyntaxMask";
+    })(TransformFlags = ts.TransformFlags || (ts.TransformFlags = {}));
+    var EmitFlags;
     (function (EmitFlags) {
-        EmitFlags[EmitFlags["EmitEmitHelpers"] = 1] = "EmitEmitHelpers";
-        EmitFlags[EmitFlags["EmitExportStar"] = 2] = "EmitExportStar";
-        EmitFlags[EmitFlags["EmitSuperHelper"] = 4] = "EmitSuperHelper";
-        EmitFlags[EmitFlags["EmitAdvancedSuperHelper"] = 8] = "EmitAdvancedSuperHelper";
-        EmitFlags[EmitFlags["UMDDefine"] = 16] = "UMDDefine";
-        EmitFlags[EmitFlags["SingleLine"] = 32] = "SingleLine";
-        EmitFlags[EmitFlags["AdviseOnEmitNode"] = 64] = "AdviseOnEmitNode";
-        EmitFlags[EmitFlags["NoSubstitution"] = 128] = "NoSubstitution";
-        EmitFlags[EmitFlags["CapturesThis"] = 256] = "CapturesThis";
-        EmitFlags[EmitFlags["NoLeadingSourceMap"] = 512] = "NoLeadingSourceMap";
-        EmitFlags[EmitFlags["NoTrailingSourceMap"] = 1024] = "NoTrailingSourceMap";
-        EmitFlags[EmitFlags["NoSourceMap"] = 1536] = "NoSourceMap";
-        EmitFlags[EmitFlags["NoNestedSourceMaps"] = 2048] = "NoNestedSourceMaps";
-        EmitFlags[EmitFlags["NoTokenLeadingSourceMaps"] = 4096] = "NoTokenLeadingSourceMaps";
-        EmitFlags[EmitFlags["NoTokenTrailingSourceMaps"] = 8192] = "NoTokenTrailingSourceMaps";
-        EmitFlags[EmitFlags["NoTokenSourceMaps"] = 12288] = "NoTokenSourceMaps";
-        EmitFlags[EmitFlags["NoLeadingComments"] = 16384] = "NoLeadingComments";
-        EmitFlags[EmitFlags["NoTrailingComments"] = 32768] = "NoTrailingComments";
-        EmitFlags[EmitFlags["NoComments"] = 49152] = "NoComments";
-        EmitFlags[EmitFlags["NoNestedComments"] = 65536] = "NoNestedComments";
-        EmitFlags[EmitFlags["ExportName"] = 131072] = "ExportName";
-        EmitFlags[EmitFlags["LocalName"] = 262144] = "LocalName";
-        EmitFlags[EmitFlags["Indented"] = 524288] = "Indented";
-        EmitFlags[EmitFlags["NoIndentation"] = 1048576] = "NoIndentation";
-        EmitFlags[EmitFlags["AsyncFunctionBody"] = 2097152] = "AsyncFunctionBody";
-        EmitFlags[EmitFlags["ReuseTempVariableScope"] = 4194304] = "ReuseTempVariableScope";
-        EmitFlags[EmitFlags["CustomPrologue"] = 8388608] = "CustomPrologue";
-    })(ts.EmitFlags || (ts.EmitFlags = {}));
-    var EmitFlags = ts.EmitFlags;
+        EmitFlags[EmitFlags["SingleLine"] = 1] = "SingleLine";
+        EmitFlags[EmitFlags["AdviseOnEmitNode"] = 2] = "AdviseOnEmitNode";
+        EmitFlags[EmitFlags["NoSubstitution"] = 4] = "NoSubstitution";
+        EmitFlags[EmitFlags["CapturesThis"] = 8] = "CapturesThis";
+        EmitFlags[EmitFlags["NoLeadingSourceMap"] = 16] = "NoLeadingSourceMap";
+        EmitFlags[EmitFlags["NoTrailingSourceMap"] = 32] = "NoTrailingSourceMap";
+        EmitFlags[EmitFlags["NoSourceMap"] = 48] = "NoSourceMap";
+        EmitFlags[EmitFlags["NoNestedSourceMaps"] = 64] = "NoNestedSourceMaps";
+        EmitFlags[EmitFlags["NoTokenLeadingSourceMaps"] = 128] = "NoTokenLeadingSourceMaps";
+        EmitFlags[EmitFlags["NoTokenTrailingSourceMaps"] = 256] = "NoTokenTrailingSourceMaps";
+        EmitFlags[EmitFlags["NoTokenSourceMaps"] = 384] = "NoTokenSourceMaps";
+        EmitFlags[EmitFlags["NoLeadingComments"] = 512] = "NoLeadingComments";
+        EmitFlags[EmitFlags["NoTrailingComments"] = 1024] = "NoTrailingComments";
+        EmitFlags[EmitFlags["NoComments"] = 1536] = "NoComments";
+        EmitFlags[EmitFlags["NoNestedComments"] = 2048] = "NoNestedComments";
+        EmitFlags[EmitFlags["HelperName"] = 4096] = "HelperName";
+        EmitFlags[EmitFlags["ExportName"] = 8192] = "ExportName";
+        EmitFlags[EmitFlags["LocalName"] = 16384] = "LocalName";
+        EmitFlags[EmitFlags["InternalName"] = 32768] = "InternalName";
+        EmitFlags[EmitFlags["Indented"] = 65536] = "Indented";
+        EmitFlags[EmitFlags["NoIndentation"] = 131072] = "NoIndentation";
+        EmitFlags[EmitFlags["AsyncFunctionBody"] = 262144] = "AsyncFunctionBody";
+        EmitFlags[EmitFlags["ReuseTempVariableScope"] = 524288] = "ReuseTempVariableScope";
+        EmitFlags[EmitFlags["CustomPrologue"] = 1048576] = "CustomPrologue";
+        EmitFlags[EmitFlags["NoHoisting"] = 2097152] = "NoHoisting";
+        EmitFlags[EmitFlags["HasEndOfDeclarationMarker"] = 4194304] = "HasEndOfDeclarationMarker";
+        EmitFlags[EmitFlags["Iterator"] = 8388608] = "Iterator";
+        EmitFlags[EmitFlags["NoAsciiEscaping"] = 16777216] = "NoAsciiEscaping";
+    })(EmitFlags = ts.EmitFlags || (ts.EmitFlags = {}));
+    /**
+     * Used by the checker, this enum keeps track of external emit helpers that should be type
+     * checked.
+     */
     /* @internal */
-    (function (EmitContext) {
-        EmitContext[EmitContext["SourceFile"] = 0] = "SourceFile";
-        EmitContext[EmitContext["Expression"] = 1] = "Expression";
-        EmitContext[EmitContext["IdentifierName"] = 2] = "IdentifierName";
-        EmitContext[EmitContext["Unspecified"] = 3] = "Unspecified";
-    })(ts.EmitContext || (ts.EmitContext = {}));
-    var EmitContext = ts.EmitContext;
+    var ExternalEmitHelpers;
+    (function (ExternalEmitHelpers) {
+        ExternalEmitHelpers[ExternalEmitHelpers["Extends"] = 1] = "Extends";
+        ExternalEmitHelpers[ExternalEmitHelpers["Assign"] = 2] = "Assign";
+        ExternalEmitHelpers[ExternalEmitHelpers["Rest"] = 4] = "Rest";
+        ExternalEmitHelpers[ExternalEmitHelpers["Decorate"] = 8] = "Decorate";
+        ExternalEmitHelpers[ExternalEmitHelpers["Metadata"] = 16] = "Metadata";
+        ExternalEmitHelpers[ExternalEmitHelpers["Param"] = 32] = "Param";
+        ExternalEmitHelpers[ExternalEmitHelpers["Awaiter"] = 64] = "Awaiter";
+        ExternalEmitHelpers[ExternalEmitHelpers["Generator"] = 128] = "Generator";
+        ExternalEmitHelpers[ExternalEmitHelpers["Values"] = 256] = "Values";
+        ExternalEmitHelpers[ExternalEmitHelpers["Read"] = 512] = "Read";
+        ExternalEmitHelpers[ExternalEmitHelpers["Spread"] = 1024] = "Spread";
+        ExternalEmitHelpers[ExternalEmitHelpers["Await"] = 2048] = "Await";
+        ExternalEmitHelpers[ExternalEmitHelpers["AsyncGenerator"] = 4096] = "AsyncGenerator";
+        ExternalEmitHelpers[ExternalEmitHelpers["AsyncDelegator"] = 8192] = "AsyncDelegator";
+        ExternalEmitHelpers[ExternalEmitHelpers["AsyncValues"] = 16384] = "AsyncValues";
+        ExternalEmitHelpers[ExternalEmitHelpers["ExportStar"] = 32768] = "ExportStar";
+        // Helpers included by ES2015 for..of
+        ExternalEmitHelpers[ExternalEmitHelpers["ForOfIncludes"] = 256] = "ForOfIncludes";
+        // Helpers included by ES2017 for..await..of
+        ExternalEmitHelpers[ExternalEmitHelpers["ForAwaitOfIncludes"] = 16384] = "ForAwaitOfIncludes";
+        // Helpers included by ES2017 async generators
+        ExternalEmitHelpers[ExternalEmitHelpers["AsyncGeneratorIncludes"] = 6144] = "AsyncGeneratorIncludes";
+        // Helpers included by yield* in ES2017 async generators
+        ExternalEmitHelpers[ExternalEmitHelpers["AsyncDelegatorIncludes"] = 26624] = "AsyncDelegatorIncludes";
+        // Helpers included by ES2015 spread
+        ExternalEmitHelpers[ExternalEmitHelpers["SpreadIncludes"] = 1536] = "SpreadIncludes";
+        ExternalEmitHelpers[ExternalEmitHelpers["FirstEmitHelper"] = 1] = "FirstEmitHelper";
+        ExternalEmitHelpers[ExternalEmitHelpers["LastEmitHelper"] = 32768] = "LastEmitHelper";
+    })(ExternalEmitHelpers = ts.ExternalEmitHelpers || (ts.ExternalEmitHelpers = {}));
+    var EmitHint;
+    (function (EmitHint) {
+        EmitHint[EmitHint["SourceFile"] = 0] = "SourceFile";
+        EmitHint[EmitHint["Expression"] = 1] = "Expression";
+        EmitHint[EmitHint["IdentifierName"] = 2] = "IdentifierName";
+        EmitHint[EmitHint["Unspecified"] = 3] = "Unspecified";
+    })(EmitHint = ts.EmitHint || (ts.EmitHint = {}));
 })(ts || (ts = {}));
 /*@internal*/
 var ts;
@@ -1026,13 +1212,12 @@ var ts;
 })(ts || (ts = {}));
 /*@internal*/
 /** Performance measurements for the compiler. */
-var ts;
 (function (ts) {
     var performance;
     (function (performance) {
         var profilerEvent = typeof onProfilerEvent === "function" && onProfilerEvent.profiler === true
             ? onProfilerEvent
-            : function (markName) { };
+            : function (_markName) { };
         var enabled = false;
         var profilerStart = 0;
         var counts;
@@ -1045,8 +1230,8 @@ var ts;
          */
         function mark(markName) {
             if (enabled) {
-                marks[markName] = ts.timestamp();
-                counts[markName] = (counts[markName] || 0) + 1;
+                marks.set(markName, ts.timestamp());
+                counts.set(markName, (counts.get(markName) || 0) + 1);
                 profilerEvent(markName);
             }
         }
@@ -1062,9 +1247,9 @@ var ts;
          */
         function measure(measureName, startMarkName, endMarkName) {
             if (enabled) {
-                var end = endMarkName && marks[endMarkName] || ts.timestamp();
-                var start = startMarkName && marks[startMarkName] || profilerStart;
-                measures[measureName] = (measures[measureName] || 0) + (end - start);
+                var end = endMarkName && marks.get(endMarkName) || ts.timestamp();
+                var start = startMarkName && marks.get(startMarkName) || profilerStart;
+                measures.set(measureName, (measures.get(measureName) || 0) + (end - start));
             }
         }
         performance.measure = measure;
@@ -1074,7 +1259,7 @@ var ts;
          * @param markName The name of the mark.
          */
         function getCount(markName) {
-            return counts && counts[markName] || 0;
+            return counts && counts.get(markName) || 0;
         }
         performance.getCount = getCount;
         /**
@@ -1083,7 +1268,7 @@ var ts;
          * @param measureName The name of the measure whose durations should be accumulated.
          */
         function getDuration(measureName) {
-            return measures && measures[measureName] || 0;
+            return measures && measures.get(measureName) || 0;
         }
         performance.getDuration = getDuration;
         /**
@@ -1092,9 +1277,9 @@ var ts;
          * @param cb The action to perform for each measure
          */
         function forEachMeasure(cb) {
-            for (var key in measures) {
-                cb(key, measures[key]);
-            }
+            measures.forEach(function (measure, key) {
+                cb(key, measure);
+            });
         }
         performance.forEachMeasure = forEachMeasure;
         /** Enables (and resets) performance measurements for the compiler. */
@@ -1115,8 +1300,12 @@ var ts;
 })(ts || (ts = {}));
 /// <reference path="types.ts"/>
 /// <reference path="performance.ts" />
-/* @internal */
 var ts;
+(function (ts) {
+    /** The version of the TypeScript compiler release */
+    ts.version = "2.5.0";
+})(ts || (ts = {}));
+/* @internal */
 (function (ts) {
     /**
      * Ternary values are defined such that
@@ -1127,29 +1316,113 @@ var ts;
      * x | y is Maybe if either x or y is Maybe, but neither x or y is True.
      * x | y is True if either x or y is True.
      */
+    var Ternary;
     (function (Ternary) {
         Ternary[Ternary["False"] = 0] = "False";
         Ternary[Ternary["Maybe"] = 1] = "Maybe";
         Ternary[Ternary["True"] = -1] = "True";
-    })(ts.Ternary || (ts.Ternary = {}));
-    var Ternary = ts.Ternary;
-    var createObject = Object.create;
-    function createMap(template) {
-        var map = createObject(null); // tslint:disable-line:no-null-keyword
+    })(Ternary = ts.Ternary || (ts.Ternary = {}));
+    // More efficient to create a collator once and use its `compare` than to call `a.localeCompare(b)` many times.
+    ts.collator = typeof Intl === "object" && typeof Intl.Collator === "function" ? new Intl.Collator(/*locales*/ undefined, { usage: "sort", sensitivity: "accent" }) : undefined;
+    // Intl is missing in Safari, and node 0.10 treats "a" as greater than "B".
+    ts.localeCompareIsCorrect = ts.collator && ts.collator.compare("a", "B") < 0;
+    /** Create a MapLike with good performance. */
+    function createDictionaryObject() {
+        var map = Object.create(/*prototype*/ null); // tslint:disable-line:no-null-keyword
         // Using 'delete' on an object causes V8 to put the object in dictionary mode.
         // This disables creation of hidden classes, which are expensive when an object is
         // constantly changing shape.
         map["__"] = undefined;
         delete map["__"];
+        return map;
+    }
+    /** Create a new map. If a template object is provided, the map will copy entries from it. */
+    function createMap() {
+        return new MapCtr();
+    }
+    ts.createMap = createMap;
+    function createMapFromTemplate(template) {
+        var map = new MapCtr();
         // Copies keys/values from template. Note that for..in will not throw if
         // template is undefined, and instead will just exit the loop.
-        for (var key in template)
+        for (var key in template) {
             if (hasOwnProperty.call(template, key)) {
-                map[key] = template[key];
+                map.set(key, template[key]);
             }
+        }
         return map;
     }
-    ts.createMap = createMap;
+    ts.createMapFromTemplate = createMapFromTemplate;
+    // Internet Explorer's Map doesn't support iteration, so don't use it.
+    // tslint:disable-next-line:no-in-operator
+    var MapCtr = typeof Map !== "undefined" && "entries" in Map.prototype ? Map : shimMap();
+    // Keep the class inside a function so it doesn't get compiled if it's not used.
+    function shimMap() {
+        var MapIterator = (function () {
+            function MapIterator(data, selector) {
+                this.index = 0;
+                this.data = data;
+                this.selector = selector;
+                this.keys = Object.keys(data);
+            }
+            MapIterator.prototype.next = function () {
+                var index = this.index;
+                if (index < this.keys.length) {
+                    this.index++;
+                    return { value: this.selector(this.data, this.keys[index]), done: false };
+                }
+                return { value: undefined, done: true };
+            };
+            return MapIterator;
+        }());
+        return (function () {
+            function class_1() {
+                this.data = createDictionaryObject();
+                this.size = 0;
+            }
+            class_1.prototype.get = function (key) {
+                return this.data[key];
+            };
+            class_1.prototype.set = function (key, value) {
+                if (!this.has(key)) {
+                    this.size++;
+                }
+                this.data[key] = value;
+                return this;
+            };
+            class_1.prototype.has = function (key) {
+                // tslint:disable-next-line:no-in-operator
+                return key in this.data;
+            };
+            class_1.prototype.delete = function (key) {
+                if (this.has(key)) {
+                    this.size--;
+                    delete this.data[key];
+                    return true;
+                }
+                return false;
+            };
+            class_1.prototype.clear = function () {
+                this.data = createDictionaryObject();
+                this.size = 0;
+            };
+            class_1.prototype.keys = function () {
+                return new MapIterator(this.data, function (_data, key) { return key; });
+            };
+            class_1.prototype.values = function () {
+                return new MapIterator(this.data, function (data, key) { return data[key]; });
+            };
+            class_1.prototype.entries = function () {
+                return new MapIterator(this.data, function (data, key) { return [key, data[key]]; });
+            };
+            class_1.prototype.forEach = function (action) {
+                for (var key in this.data) {
+                    action(this.data[key], key);
+                }
+            };
+            return class_1;
+        }());
+    }
     function createFileMap(keyMapper) {
         var files = createMap();
         return {
@@ -1162,33 +1435,28 @@ var ts;
             clear: clear,
         };
         function forEachValueInMap(f) {
-            for (var key in files) {
-                f(key, files[key]);
-            }
+            files.forEach(function (file, key) {
+                f(key, file);
+            });
         }
         function getKeys() {
-            var keys = [];
-            for (var key in files) {
-                keys.push(key);
-            }
-            return keys;
+            return arrayFrom(files.keys());
         }
         // path should already be well-formed so it does not need to be normalized
         function get(path) {
-            return files[toKey(path)];
+            return files.get(toKey(path));
         }
         function set(path, value) {
-            files[toKey(path)] = value;
+            files.set(toKey(path), value);
         }
         function contains(path) {
-            return toKey(path) in files;
+            return files.has(toKey(path));
         }
         function remove(path) {
-            var key = toKey(path);
-            delete files[key];
+            files.delete(toKey(path));
         }
         function clear() {
-            files = createMap();
+            files.clear();
         }
         function toKey(path) {
             return keyMapper ? keyMapper(path) : path;
@@ -1202,12 +1470,16 @@ var ts;
         return getCanonicalFileName(nonCanonicalizedPath);
     }
     ts.toPath = toPath;
+    var Comparison;
     (function (Comparison) {
         Comparison[Comparison["LessThan"] = -1] = "LessThan";
         Comparison[Comparison["EqualTo"] = 0] = "EqualTo";
         Comparison[Comparison["GreaterThan"] = 1] = "GreaterThan";
-    })(ts.Comparison || (ts.Comparison = {}));
-    var Comparison = ts.Comparison;
+    })(Comparison = ts.Comparison || (ts.Comparison = {}));
+    function length(array) {
+        return array ? array.length : 0;
+    }
+    ts.length = length;
     /**
      * Iterates through 'array' by index and performs the callback on each element of array until the callback
      * returns a truthy value, then returns that value.
@@ -1215,7 +1487,7 @@ var ts;
      */
     function forEach(array, callback) {
         if (array) {
-            for (var i = 0, len = array.length; i < len; i++) {
+            for (var i = 0; i < array.length; i++) {
                 var result = callback(array[i], i);
                 if (result) {
                     return result;
@@ -1225,6 +1497,36 @@ var ts;
         return undefined;
     }
     ts.forEach = forEach;
+    function findAncestor(node, callback) {
+        while (node) {
+            var result = callback(node);
+            if (result === "quit") {
+                return undefined;
+            }
+            else if (result) {
+                return node;
+            }
+            node = node.parent;
+        }
+        return undefined;
+    }
+    ts.findAncestor = findAncestor;
+    function zipWith(arrayA, arrayB, callback) {
+        Debug.assert(arrayA.length === arrayB.length);
+        for (var i = 0; i < arrayA.length; i++) {
+            callback(arrayA[i], arrayB[i], i);
+        }
+    }
+    ts.zipWith = zipWith;
+    function zipToMap(keys, values) {
+        Debug.assert(keys.length === values.length);
+        var map = createMap();
+        for (var i = 0; i < keys.length; ++i) {
+            map.set(keys[i], values[i]);
+        }
+        return map;
+    }
+    ts.zipToMap = zipToMap;
     /**
      * Iterates through `array` by index and performs the callback on each element of array until the callback
      * returns a falsey value, then returns false.
@@ -1232,7 +1534,7 @@ var ts;
      */
     function every(array, callback) {
         if (array) {
-            for (var i = 0, len = array.length; i < len; i++) {
+            for (var i = 0; i < array.length; i++) {
                 if (!callback(array[i], i)) {
                     return false;
                 }
@@ -1243,7 +1545,7 @@ var ts;
     ts.every = every;
     /** Works like Array.prototype.find, returning `undefined` if no element satisfying the predicate is found. */
     function find(array, predicate) {
-        for (var i = 0, len = array.length; i < len; i++) {
+        for (var i = 0; i < array.length; i++) {
             var value = array[i];
             if (predicate(value, i)) {
                 return value;
@@ -1252,12 +1554,22 @@ var ts;
         return undefined;
     }
     ts.find = find;
+    /** Works like Array.prototype.findIndex, returning `-1` if no element satisfying the predicate is found. */
+    function findIndex(array, predicate) {
+        for (var i = 0; i < array.length; i++) {
+            if (predicate(array[i], i)) {
+                return i;
+            }
+        }
+        return -1;
+    }
+    ts.findIndex = findIndex;
     /**
      * Returns the first truthy result of `callback`, or else fails.
      * This is like `forEach`, but never returns undefined.
      */
     function findMap(array, callback) {
-        for (var i = 0, len = array.length; i < len; i++) {
+        for (var i = 0; i < array.length; i++) {
             var result = callback(array[i], i);
             if (result) {
                 return result;
@@ -1280,7 +1592,7 @@ var ts;
     ts.contains = contains;
     function indexOf(array, value) {
         if (array) {
-            for (var i = 0, len = array.length; i < len; i++) {
+            for (var i = 0; i < array.length; i++) {
                 if (array[i] === value) {
                     return i;
                 }
@@ -1290,7 +1602,7 @@ var ts;
     }
     ts.indexOf = indexOf;
     function indexOfAnyCharCode(text, charCodes, start) {
-        for (var i = start || 0, len = text.length; i < len; i++) {
+        for (var i = start || 0; i < text.length; i++) {
             if (contains(charCodes, text.charCodeAt(i))) {
                 return i;
             }
@@ -1366,13 +1678,33 @@ var ts;
         if (array) {
             result = [];
             for (var i = 0; i < array.length; i++) {
-                var v = array[i];
-                result.push(f(v, i));
+                result.push(f(array[i], i));
             }
         }
         return result;
     }
     ts.map = map;
+    // Maps from T to T and avoids allocation if all elements map to themselves
+    function sameMap(array, f) {
+        var result;
+        if (array) {
+            for (var i = 0; i < array.length; i++) {
+                if (result) {
+                    result.push(f(array[i], i));
+                }
+                else {
+                    var item = array[i];
+                    var mapped = f(item, i);
+                    if (item !== mapped) {
+                        result = array.slice(0, i);
+                        result.push(mapped);
+                    }
+                }
+            }
+        }
+        return result || array;
+    }
+    ts.sameMap = sameMap;
     /**
      * Flattens an array containing a mix of array or non-array elements.
      *
@@ -1422,6 +1754,47 @@ var ts;
         return result;
     }
     ts.flatMap = flatMap;
+    /**
+     * Maps an array. If the mapped value is an array, it is spread into the result.
+     * Avoids allocation if all elements map to themselves.
+     *
+     * @param array The array to map.
+     * @param mapfn The callback used to map the result into one or more values.
+     */
+    function sameFlatMap(array, mapfn) {
+        var result;
+        if (array) {
+            for (var i = 0; i < array.length; i++) {
+                var item = array[i];
+                var mapped = mapfn(item, i);
+                if (result || item !== mapped || isArray(mapped)) {
+                    if (!result) {
+                        result = array.slice(0, i);
+                    }
+                    if (isArray(mapped)) {
+                        addRange(result, mapped);
+                    }
+                    else {
+                        result.push(mapped);
+                    }
+                }
+            }
+        }
+        return result || array;
+    }
+    ts.sameFlatMap = sameFlatMap;
+    function mapDefined(array, mapFn) {
+        var result = [];
+        for (var i = 0; i < array.length; i++) {
+            var item = array[i];
+            var mapped = mapFn(item, i);
+            if (mapped !== undefined) {
+                result.push(mapped);
+            }
+        }
+        return result;
+    }
+    ts.mapDefined = mapDefined;
     /**
      * Computes the first matching span of elements and returns a tuple of the first span
      * and the remaining elements.
@@ -1480,25 +1853,39 @@ var ts;
         return result;
     }
     ts.spanMap = spanMap;
-    function mapObject(object, f) {
-        var result;
-        if (object) {
-            result = {};
-            for (var _i = 0, _a = getOwnKeys(object); _i < _a.length; _i++) {
-                var v = _a[_i];
-                var _b = f(v, object[v]) || [undefined, undefined], key = _b[0], value = _b[1];
-                if (key !== undefined) {
-                    result[key] = value;
+    function mapEntries(map, f) {
+        if (!map) {
+            return undefined;
+        }
+        var result = createMap();
+        map.forEach(function (value, key) {
+            var _a = f(key, value), newKey = _a[0], newValue = _a[1];
+            result.set(newKey, newValue);
+        });
+        return result;
+    }
+    ts.mapEntries = mapEntries;
+    function some(array, predicate) {
+        if (array) {
+            if (predicate) {
+                for (var _i = 0, array_5 = array; _i < array_5.length; _i++) {
+                    var v = array_5[_i];
+                    if (predicate(v)) {
+                        return true;
+                    }
                 }
             }
+            else {
+                return array.length > 0;
+            }
         }
-        return result;
+        return false;
     }
-    ts.mapObject = mapObject;
+    ts.some = some;
     function concatenate(array1, array2) {
-        if (!array2 || !array2.length)
+        if (!some(array2))
             return array1;
-        if (!array1 || !array1.length)
+        if (!some(array1))
             return array2;
         return array1.concat(array2);
     }
@@ -1508,8 +1895,8 @@ var ts;
         var result;
         if (array) {
             result = [];
-            loop: for (var _i = 0, array_5 = array; _i < array_5.length; _i++) {
-                var item = array_5[_i];
+            loop: for (var _i = 0, array_6 = array; _i < array_6.length; _i++) {
+                var item = array_6[_i];
                 for (var _a = 0, result_1 = result; _a < result_1.length; _a++) {
                     var res = result_1[_a];
                     if (areEqual ? areEqual(res, item) : res === item) {
@@ -1522,6 +1909,41 @@ var ts;
         return result;
     }
     ts.deduplicate = deduplicate;
+    function arrayIsEqualTo(array1, array2, equaler) {
+        if (!array1 || !array2) {
+            return array1 === array2;
+        }
+        if (array1.length !== array2.length) {
+            return false;
+        }
+        for (var i = 0; i < array1.length; i++) {
+            var equals = equaler ? equaler(array1[i], array2[i]) : array1[i] === array2[i];
+            if (!equals) {
+                return false;
+            }
+        }
+        return true;
+    }
+    ts.arrayIsEqualTo = arrayIsEqualTo;
+    function changesAffectModuleResolution(oldOptions, newOptions) {
+        return !oldOptions ||
+            (oldOptions.module !== newOptions.module) ||
+            (oldOptions.moduleResolution !== newOptions.moduleResolution) ||
+            (oldOptions.noResolve !== newOptions.noResolve) ||
+            (oldOptions.target !== newOptions.target) ||
+            (oldOptions.noLib !== newOptions.noLib) ||
+            (oldOptions.jsx !== newOptions.jsx) ||
+            (oldOptions.allowJs !== newOptions.allowJs) ||
+            (oldOptions.rootDir !== newOptions.rootDir) ||
+            (oldOptions.configFilePath !== newOptions.configFilePath) ||
+            (oldOptions.baseUrl !== newOptions.baseUrl) ||
+            (oldOptions.maxNodeModuleJsDepth !== newOptions.maxNodeModuleJsDepth) ||
+            !arrayIsEqualTo(oldOptions.lib, newOptions.lib) ||
+            !arrayIsEqualTo(oldOptions.typeRoots, newOptions.typeRoots) ||
+            !arrayIsEqualTo(oldOptions.rootDirs, newOptions.rootDirs) ||
+            !equalOwnProperties(oldOptions.paths, newOptions.paths);
+    }
+    ts.changesAffectModuleResolution = changesAffectModuleResolution;
     /**
      * Compacts an array, removing any falsey elements.
      */
@@ -1543,26 +1965,101 @@ var ts;
         return result || array;
     }
     ts.compact = compact;
+    /**
+     * Gets the relative complement of `arrayA` with respect to `b`, returning the elements that
+     * are not present in `arrayA` but are present in `arrayB`. Assumes both arrays are sorted
+     * based on the provided comparer.
+     */
+    function relativeComplement(arrayA, arrayB, comparer, offsetA, offsetB) {
+        if (comparer === void 0) { comparer = compareValues; }
+        if (offsetA === void 0) { offsetA = 0; }
+        if (offsetB === void 0) { offsetB = 0; }
+        if (!arrayB || !arrayA || arrayB.length === 0 || arrayA.length === 0)
+            return arrayB;
+        var result = [];
+        outer: for (; offsetB < arrayB.length; offsetB++) {
+            inner: for (; offsetA < arrayA.length; offsetA++) {
+                switch (comparer(arrayB[offsetB], arrayA[offsetA])) {
+                    case -1 /* LessThan */: break inner;
+                    case 0 /* EqualTo */: continue outer;
+                    case 1 /* GreaterThan */: continue inner;
+                }
+            }
+            result.push(arrayB[offsetB]);
+        }
+        return result;
+    }
+    ts.relativeComplement = relativeComplement;
     function sum(array, prop) {
         var result = 0;
-        for (var _i = 0, array_6 = array; _i < array_6.length; _i++) {
-            var v = array_6[_i];
+        for (var _i = 0, array_7 = array; _i < array_7.length; _i++) {
+            var v = array_7[_i];
             result += v[prop];
         }
         return result;
     }
     ts.sum = sum;
-    function addRange(to, from) {
-        if (to && from) {
-            for (var _i = 0, from_1 = from; _i < from_1.length; _i++) {
-                var v = from_1[_i];
-                if (v !== undefined) {
-                    to.push(v);
-                }
+    /**
+     * Appends a value to an array, returning the array.
+     *
+     * @param to The array to which `value` is to be appended. If `to` is `undefined`, a new array
+     * is created if `value` was appended.
+     * @param value The value to append to the array. If `value` is `undefined`, nothing is
+     * appended.
+     */
+    function append(to, value) {
+        if (value === undefined)
+            return to;
+        if (to === undefined)
+            return [value];
+        to.push(value);
+        return to;
+    }
+    ts.append = append;
+    /**
+     * Gets the actual offset into an array for a relative offset. Negative offsets indicate a
+     * position offset from the end of the array.
+     */
+    function toOffset(array, offset) {
+        return offset < 0 ? array.length + offset : offset;
+    }
+    /**
+     * Appends a range of value to an array, returning the array.
+     *
+     * @param to The array to which `value` is to be appended. If `to` is `undefined`, a new array
+     * is created if `value` was appended.
+     * @param from The values to append to the array. If `from` is `undefined`, nothing is
+     * appended. If an element of `from` is `undefined`, that element is not appended.
+     * @param start The offset in `from` at which to start copying values.
+     * @param end The offset in `from` at which to stop copying values (non-inclusive).
+     */
+    function addRange(to, from, start, end) {
+        if (from === undefined)
+            return to;
+        if (to === undefined)
+            return from.slice(start, end);
+        start = start === undefined ? 0 : toOffset(from, start);
+        end = end === undefined ? from.length : toOffset(from, end);
+        for (var i = start; i < end && i < from.length; i++) {
+            var v = from[i];
+            if (v !== undefined) {
+                to.push(from[i]);
             }
         }
+        return to;
     }
     ts.addRange = addRange;
+    /**
+     * Stable sort of an array. Elements equal to each other maintain their relative position in the array.
+     */
+    function stableSort(array, comparer) {
+        if (comparer === void 0) { comparer = compareValues; }
+        return array
+            .map(function (_, i) { return i; }) // create array of indices
+            .sort(function (x, y) { return comparer(array[x], array[y]) || compareValues(x, y); }) // sort indices by value then position
+            .map(function (i) { return array[i]; }); // get sorted array
+    }
+    ts.stableSort = stableSort;
     function rangeEquals(array1, array2, pos, end) {
         while (pos < end) {
             if (array1[pos] !== array2[pos]) {
@@ -1573,33 +2070,59 @@ var ts;
         return true;
     }
     ts.rangeEquals = rangeEquals;
+    /**
+     * Returns the element at a specific offset in an array if non-empty, `undefined` otherwise.
+     * A negative offset indicates the element should be retrieved from the end of the array.
+     */
+    function elementAt(array, offset) {
+        if (array) {
+            offset = toOffset(array, offset);
+            if (offset < array.length) {
+                return array[offset];
+            }
+        }
+        return undefined;
+    }
+    ts.elementAt = elementAt;
+    /**
+     * Returns the first element of an array if non-empty, `undefined` otherwise.
+     */
     function firstOrUndefined(array) {
-        return array && array.length > 0
-            ? array[0]
-            : undefined;
+        return elementAt(array, 0);
     }
     ts.firstOrUndefined = firstOrUndefined;
+    /**
+     * Returns the last element of an array if non-empty, `undefined` otherwise.
+     */
+    function lastOrUndefined(array) {
+        return elementAt(array, -1);
+    }
+    ts.lastOrUndefined = lastOrUndefined;
+    /**
+     * Returns the only element of an array if it contains only one element, `undefined` otherwise.
+     */
     function singleOrUndefined(array) {
         return array && array.length === 1
             ? array[0]
             : undefined;
     }
     ts.singleOrUndefined = singleOrUndefined;
+    /**
+     * Returns the only element of an array if it contains only one element; otheriwse, returns the
+     * array.
+     */
     function singleOrMany(array) {
         return array && array.length === 1
             ? array[0]
             : array;
     }
     ts.singleOrMany = singleOrMany;
-    /**
-     * Returns the last element of an array if non-empty, undefined otherwise.
-     */
-    function lastOrUndefined(array) {
-        return array && array.length > 0
-            ? array[array.length - 1]
-            : undefined;
+    function replaceElement(array, index, value) {
+        var result = array.slice(0);
+        result[index] = value;
+        return result;
     }
-    ts.lastOrUndefined = lastOrUndefined;
+    ts.replaceElement = replaceElement;
     /**
      * Performs a binary search, finding the index at which 'value' occurs in 'array'.
      * If no such index is found, returns the 2's-complement of first index at which
@@ -1607,11 +2130,11 @@ var ts;
      * @param array A sorted array whose first element must be no larger than number
      * @param number The value to be searched for in the array.
      */
-    function binarySearch(array, value, comparer) {
+    function binarySearch(array, value, comparer, offset) {
         if (!array || array.length === 0) {
             return -1;
         }
-        var low = 0;
+        var low = offset || 0;
         var high = array.length - 1;
         comparer = comparer !== undefined
             ? comparer
@@ -1684,9 +2207,6 @@ var ts;
     /**
      * Indicates whether a map-like contains an own property with the specified key.
      *
-     * NOTE: This is intended for use only with MapLike<T> objects. For Map<T> objects, use
-     *       the 'in' operator.
-     *
      * @param map A map-like.
      * @param key A property key.
      */
@@ -1697,9 +2217,6 @@ var ts;
     /**
      * Gets the value of an owned property in a map-like.
      *
-     * NOTE: This is intended for use only with MapLike<T> objects. For Map<T> objects, use
-     *       an indexer.
-     *
      * @param map A map-like.
      * @param key A property key.
      */
@@ -1717,54 +2234,69 @@ var ts;
      */
     function getOwnKeys(map) {
         var keys = [];
-        for (var key in map)
+        for (var key in map) {
             if (hasOwnProperty.call(map, key)) {
                 keys.push(key);
             }
+        }
         return keys;
     }
     ts.getOwnKeys = getOwnKeys;
-    /**
-     * Enumerates the properties of a Map<T>, invoking a callback and returning the first truthy result.
-     *
-     * @param map A map for which properties should be enumerated.
-     * @param callback A callback to invoke for each property.
-     */
-    function forEachProperty(map, callback) {
-        var result;
-        for (var key in map) {
-            if (result = callback(map[key], key))
-                break;
+    function arrayFrom(iterator, map) {
+        var result = [];
+        for (var _a = iterator.next(), value = _a.value, done = _a.done; !done; _b = iterator.next(), value = _b.value, done = _b.done, _b) {
+            result.push(map ? map(value) : value);
         }
         return result;
+        var _b;
     }
-    ts.forEachProperty = forEachProperty;
-    /**
-     * Returns true if a Map<T> has some matching property.
-     *
-     * @param map A map whose properties should be tested.
-     * @param predicate An optional callback used to test each property.
-     */
-    function someProperties(map, predicate) {
-        for (var key in map) {
-            if (!predicate || predicate(map[key], key))
-                return true;
+    ts.arrayFrom = arrayFrom;
+    function convertToArray(iterator, f) {
+        var result = [];
+        for (var _a = iterator.next(), value = _a.value, done = _a.done; !done; _b = iterator.next(), value = _b.value, done = _b.done, _b) {
+            result.push(f(value));
         }
-        return false;
+        return result;
+        var _b;
     }
-    ts.someProperties = someProperties;
+    ts.convertToArray = convertToArray;
     /**
-     * Performs a shallow copy of the properties from a source Map<T> to a target MapLike<T>
-     *
-     * @param source A map from which properties should be copied.
-     * @param target A map to which properties should be copied.
+     * Calls `callback` for each entry in the map, returning the first truthy result.
+     * Use `map.forEach` instead for normal iteration.
      */
-    function copyProperties(source, target) {
-        for (var key in source) {
-            target[key] = source[key];
+    function forEachEntry(map, callback) {
+        var iterator = map.entries();
+        for (var _a = iterator.next(), pair = _a.value, done = _a.done; !done; _b = iterator.next(), pair = _b.value, done = _b.done, _b) {
+            var key = pair[0], value = pair[1];
+            var result = callback(value, key);
+            if (result) {
+                return result;
+            }
+        }
+        return undefined;
+        var _b;
+    }
+    ts.forEachEntry = forEachEntry;
+    /** `forEachEntry` for just keys. */
+    function forEachKey(map, callback) {
+        var iterator = map.keys();
+        for (var _a = iterator.next(), key = _a.value, done = _a.done; !done; _b = iterator.next(), key = _b.value, done = _b.done, _b) {
+            var result = callback(key);
+            if (result) {
+                return result;
+            }
         }
+        return undefined;
+        var _b;
+    }
+    ts.forEachKey = forEachKey;
+    /** Copy entries from `source` to `target`. */
+    function copyEntries(source, target) {
+        source.forEach(function (value, key) {
+            target.set(key, value);
+        });
     }
-    ts.copyProperties = copyProperties;
+    ts.copyEntries = copyEntries;
     function assign(t) {
         var args = [];
         for (var _i = 1; _i < arguments.length; _i++) {
@@ -1772,51 +2304,15 @@ var ts;
         }
         for (var _a = 0, args_1 = args; _a < args_1.length; _a++) {
             var arg = args_1[_a];
-            for (var _b = 0, _c = getOwnKeys(arg); _b < _c.length; _b++) {
-                var p = _c[_b];
-                t[p] = arg[p];
+            for (var p in arg) {
+                if (hasProperty(arg, p)) {
+                    t[p] = arg[p];
+                }
             }
         }
         return t;
     }
     ts.assign = assign;
-    /**
-     * Reduce the properties of a map.
-     *
-     * NOTE: This is intended for use with Map<T> objects. For MapLike<T> objects, use
-     *       reduceOwnProperties instead as it offers better runtime safety.
-     *
-     * @param map The map to reduce
-     * @param callback An aggregation function that is called for each entry in the map
-     * @param initial The initial value for the reduction.
-     */
-    function reduceProperties(map, callback, initial) {
-        var result = initial;
-        for (var key in map) {
-            result = callback(result, map[key], String(key));
-        }
-        return result;
-    }
-    ts.reduceProperties = reduceProperties;
-    /**
-     * Reduce the properties defined on a map-like (but not from its prototype chain).
-     *
-     * NOTE: This is intended for use with MapLike<T> objects. For Map<T> objects, use
-     *       reduceProperties instead as it offers better performance.
-     *
-     * @param map The map-like to reduce
-     * @param callback An aggregation function that is called for each entry in the map
-     * @param initial The initial value for the reduction.
-     */
-    function reduceOwnProperties(map, callback, initial) {
-        var result = initial;
-        for (var key in map)
-            if (hasOwnProperty.call(map, key)) {
-                result = callback(result, map[key], String(key));
-            }
-        return result;
-    }
-    ts.reduceOwnProperties = reduceOwnProperties;
     /**
      * Performs a shallow equality comparison of the contents of two map-likes.
      *
@@ -1828,42 +2324,35 @@ var ts;
             return true;
         if (!left || !right)
             return false;
-        for (var key in left)
+        for (var key in left) {
             if (hasOwnProperty.call(left, key)) {
                 if (!hasOwnProperty.call(right, key) === undefined)
                     return false;
                 if (equalityComparer ? !equalityComparer(left[key], right[key]) : left[key] !== right[key])
                     return false;
             }
-        for (var key in right)
+        }
+        for (var key in right) {
             if (hasOwnProperty.call(right, key)) {
                 if (!hasOwnProperty.call(left, key))
                     return false;
             }
+        }
         return true;
     }
     ts.equalOwnProperties = equalOwnProperties;
     function arrayToMap(array, makeKey, makeValue) {
         var result = createMap();
-        for (var _i = 0, array_7 = array; _i < array_7.length; _i++) {
-            var value = array_7[_i];
-            result[makeKey(value)] = makeValue ? makeValue(value) : value;
+        for (var _i = 0, array_8 = array; _i < array_8.length; _i++) {
+            var value = array_8[_i];
+            result.set(makeKey(value), makeValue ? makeValue(value) : value);
         }
         return result;
     }
     ts.arrayToMap = arrayToMap;
-    function isEmpty(map) {
-        for (var id in map) {
-            if (hasProperty(map, id)) {
-                return false;
-            }
-        }
-        return true;
-    }
-    ts.isEmpty = isEmpty;
     function cloneMap(map) {
         var clone = createMap();
-        copyProperties(map, clone);
+        copyEntries(map, clone);
         return clone;
     }
     ts.cloneMap = cloneMap;
@@ -1879,47 +2368,45 @@ var ts;
     ts.clone = clone;
     function extend(first, second) {
         var result = {};
-        for (var id in second)
+        for (var id in second) {
             if (hasOwnProperty.call(second, id)) {
                 result[id] = second[id];
             }
-        for (var id in first)
+        }
+        for (var id in first) {
             if (hasOwnProperty.call(first, id)) {
                 result[id] = first[id];
             }
+        }
         return result;
     }
     ts.extend = extend;
-    /**
-     * Adds the value to an array of values associated with the key, and returns the array.
-     * Creates the array if it does not already exist.
-     */
-    function multiMapAdd(map, key, value) {
-        var values = map[key];
+    function createMultiMap() {
+        var map = createMap();
+        map.add = multiMapAdd;
+        map.remove = multiMapRemove;
+        return map;
+    }
+    ts.createMultiMap = createMultiMap;
+    function multiMapAdd(key, value) {
+        var values = this.get(key);
         if (values) {
             values.push(value);
-            return values;
         }
         else {
-            return map[key] = [value];
+            this.set(key, values = [value]);
         }
+        return values;
     }
-    ts.multiMapAdd = multiMapAdd;
-    /**
-     * Removes a value from an array of values associated with the key.
-     * Does not preserve the order of those values.
-     * Does nothing if `key` is not in `map`, or `value` is not in `map[key]`.
-     */
-    function multiMapRemove(map, key, value) {
-        var values = map[key];
+    function multiMapRemove(key, value) {
+        var values = this.get(key);
         if (values) {
             unorderedRemoveItem(values, value);
             if (!values.length) {
-                delete map[key];
+                this.delete(key);
             }
         }
     }
-    ts.multiMapRemove = multiMapRemove;
     /**
      * Tests whether a value is an array.
      */
@@ -1927,6 +2414,24 @@ var ts;
         return Array.isArray ? Array.isArray(value) : value instanceof Array;
     }
     ts.isArray = isArray;
+    function tryCast(value, test) {
+        return value !== undefined && test(value) ? value : undefined;
+    }
+    ts.tryCast = tryCast;
+    function cast(value, test) {
+        if (value !== undefined && test(value))
+            return value;
+        Debug.fail("Invalid cast. The supplied value did not pass the test '" + Debug.getFunctionName(test) + "'.");
+    }
+    ts.cast = cast;
+    /** Does nothing. */
+    function noop() { }
+    ts.noop = noop;
+    /** Throws an error because a function is not implemented. */
+    function notImplemented() {
+        throw new Error("Not implemented");
+    }
+    ts.notImplemented = notImplemented;
     function memoize(callback) {
         var value;
         return function () {
@@ -1959,7 +2464,7 @@ var ts;
             return function (t) { return compose(a(t)); };
         }
         else {
-            return function (t) { return function (u) { return u; }; };
+            return function (_) { return function (u) { return u; }; };
         }
     }
     ts.chain = chain;
@@ -1990,8 +2495,9 @@ var ts;
     ts.compose = compose;
     function formatStringFromArgs(text, args, baseIndex) {
         baseIndex = baseIndex || 0;
-        return text.replace(/{(\d+)}/g, function (match, index) { return args[+index + baseIndex]; });
+        return text.replace(/{(\d+)}/g, function (_match, index) { return args[+index + baseIndex]; });
     }
+    ts.formatStringFromArgs = formatStringFromArgs;
     ts.localizedDiagnosticMessages = undefined;
     function getLocaleSpecificMessage(message) {
         return ts.localizedDiagnosticMessages && ts.localizedDiagnosticMessages[message.key] || message.message;
@@ -2020,7 +2526,7 @@ var ts;
     }
     ts.createFileDiagnostic = createFileDiagnostic;
     /* internal */
-    function formatMessage(dummy, message) {
+    function formatMessage(_dummy, message) {
         var text = getLocaleSpecificMessage(message);
         if (arguments.length > 2) {
             text = formatStringFromArgs(text, arguments, 2);
@@ -2043,6 +2549,17 @@ var ts;
         };
     }
     ts.createCompilerDiagnostic = createCompilerDiagnostic;
+    function createCompilerDiagnosticFromMessageChain(chain) {
+        return {
+            file: undefined,
+            start: undefined,
+            length: undefined,
+            code: chain.code,
+            category: chain.category,
+            messageText: chain.next ? chain : chain.messageText
+        };
+    }
+    ts.createCompilerDiagnosticFromMessageChain = createCompilerDiagnosticFromMessageChain;
     function chainDiagnosticMessages(details, message) {
         var text = getLocaleSpecificMessage(message);
         if (arguments.length > 2) {
@@ -2083,8 +2600,12 @@ var ts;
         if (b === undefined)
             return 1 /* GreaterThan */;
         if (ignoreCase) {
-            if (String.prototype.localeCompare) {
-                var result = a.localeCompare(b, /*locales*/ undefined, { usage: "sort", sensitivity: "accent" });
+            // Checking if "collator exists indicates that Intl is available.
+            // We still have to check if "collator.compare" is correct. If it is not, use "String.localeComapre"
+            if (ts.collator) {
+                var result = ts.localeCompareIsCorrect ?
+                    ts.collator.compare(a, b) :
+                    a.localeCompare(b, /*locales*/ undefined, { usage: "sort", sensitivity: "accent" }); // accent means a ≠ b, a ≠ á, a = A
                 return result < 0 ? -1 /* LessThan */ : result > 0 ? 1 /* GreaterThan */ : 0 /* EqualTo */;
             }
             a = a.toUpperCase();
@@ -2155,7 +2676,9 @@ var ts;
         return path.replace(/\\/g, "/");
     }
     ts.normalizeSlashes = normalizeSlashes;
-    // Returns length of path root (i.e. length of "/", "x:/", "//server/share/, file:///user/files")
+    /**
+     * Returns length of path root (i.e. length of "/", "x:/", "//server/share/, file:///user/files")
+     */
     function getRootLength(path) {
         if (path.charCodeAt(0) === 47 /* slash */) {
             if (path.charCodeAt(1) !== 47 /* slash */)
@@ -2188,6 +2711,11 @@ var ts;
         return 0;
     }
     ts.getRootLength = getRootLength;
+    /**
+     * Internally, we represent paths as strings with '/' as the directory separator.
+     * When we make system calls (eg: LanguageServiceHost.getDirectory()),
+     * we expect the host to correctly handle paths in our specified format.
+     */
     ts.directorySeparator = "/";
     var directorySeparatorCharCode = 47 /* slash */;
     function getNormalizedParts(normalizedSlashedPath, rootLength) {
@@ -2250,9 +2778,17 @@ var ts;
     function getEmitModuleKind(compilerOptions) {
         return typeof compilerOptions.module === "number" ?
             compilerOptions.module :
-            getEmitScriptTarget(compilerOptions) === 2 /* ES6 */ ? ts.ModuleKind.ES6 : ts.ModuleKind.CommonJS;
+            getEmitScriptTarget(compilerOptions) >= 2 /* ES2015 */ ? ts.ModuleKind.ES2015 : ts.ModuleKind.CommonJS;
     }
     ts.getEmitModuleKind = getEmitModuleKind;
+    function getEmitModuleResolutionKind(compilerOptions) {
+        var moduleResolution = compilerOptions.moduleResolution;
+        if (moduleResolution === undefined) {
+            moduleResolution = getEmitModuleKind(compilerOptions) === ts.ModuleKind.CommonJS ? ts.ModuleResolutionKind.NodeJs : ts.ModuleResolutionKind.Classic;
+        }
+        return moduleResolution;
+    }
+    ts.getEmitModuleResolutionKind = getEmitModuleResolutionKind;
     /* @internal */
     function hasZeroOrOneAsteriskCharacter(str) {
         var seenAsterisk = false;
@@ -2477,16 +3013,26 @@ var ts;
     }
     ts.startsWith = startsWith;
     /* @internal */
+    function removePrefix(str, prefix) {
+        return startsWith(str, prefix) ? str.substr(prefix.length) : str;
+    }
+    ts.removePrefix = removePrefix;
+    /* @internal */
     function endsWith(str, suffix) {
         var expectedPos = str.length - suffix.length;
         return expectedPos >= 0 && str.indexOf(suffix, expectedPos) === expectedPos;
     }
     ts.endsWith = endsWith;
+    function hasExtension(fileName) {
+        return getBaseFileName(fileName).indexOf(".") >= 0;
+    }
+    ts.hasExtension = hasExtension;
     function fileExtensionIs(path, extension) {
         return path.length > extension.length && endsWith(path, extension);
     }
     ts.fileExtensionIs = fileExtensionIs;
-    function fileExtensionIsAny(path, extensions) {
+    /* @internal */
+    function fileExtensionIsOneOf(path, extensions) {
         for (var _i = 0, extensions_1 = extensions; _i < extensions_1.length; _i++) {
             var extension = extensions_1[_i];
             if (fileExtensionIs(path, extension)) {
@@ -2495,7 +3041,7 @@ var ts;
         }
         return false;
     }
-    ts.fileExtensionIsAny = fileExtensionIsAny;
+    ts.fileExtensionIsOneOf = fileExtensionIsOneOf;
     // Reserved characters, forces escaping of any non-word (or digit), non-whitespace character.
     // It may be inefficient (we could just match (/[-[\]{}()*+?.,\\^$|#\s]/g), but this is future
     // proof.
@@ -2510,6 +3056,17 @@ var ts;
     var singleAsteriskRegexFragmentFiles = "([^./]|(\\.(?!min\\.js$))?)*";
     var singleAsteriskRegexFragmentOther = "[^/]*";
     function getRegularExpressionForWildcard(specs, basePath, usage) {
+        var patterns = getRegularExpressionsForWildcards(specs, basePath, usage);
+        if (!patterns || !patterns.length) {
+            return undefined;
+        }
+        var pattern = patterns.map(function (pattern) { return "(" + pattern + ")"; }).join("|");
+        // If excluding, match "foo/bar/baz...", but if including, only allow "foo".
+        var terminator = usage === "exclude" ? "($|/)" : "$";
+        return "^(" + pattern + ")" + terminator;
+    }
+    ts.getRegularExpressionForWildcard = getRegularExpressionForWildcard;
+    function getRegularExpressionsForWildcards(specs, basePath, usage) {
         if (specs === undefined || specs.length === 0) {
             return undefined;
         }
@@ -2520,75 +3077,74 @@ var ts;
          * files or directories, does not match subdirectories that start with a . character
          */
         var doubleAsteriskRegexFragment = usage === "exclude" ? "(/.+?)?" : "(/[^/.][^/]*)*?";
-        var pattern = "";
-        var hasWrittenSubpattern = false;
-        spec: for (var _i = 0, specs_1 = specs; _i < specs_1.length; _i++) {
-            var spec = specs_1[_i];
-            if (!spec) {
-                continue;
+        return flatMap(specs, function (spec) {
+            return spec && getSubPatternFromSpec(spec, basePath, usage, singleAsteriskRegexFragment, doubleAsteriskRegexFragment, replaceWildcardCharacter);
+        });
+    }
+    /**
+     * An "includes" path "foo" is implicitly a glob "foo/** /*" (without the space) if its last component has no extension,
+     * and does not contain any glob characters itself.
+     */
+    function isImplicitGlob(lastPathComponent) {
+        return !/[.*?]/.test(lastPathComponent);
+    }
+    ts.isImplicitGlob = isImplicitGlob;
+    function getSubPatternFromSpec(spec, basePath, usage, singleAsteriskRegexFragment, doubleAsteriskRegexFragment, replaceWildcardCharacter) {
+        var subpattern = "";
+        var hasRecursiveDirectoryWildcard = false;
+        var hasWrittenComponent = false;
+        var components = getNormalizedPathComponents(spec, basePath);
+        var lastComponent = lastOrUndefined(components);
+        if (usage !== "exclude" && lastComponent === "**") {
+            return undefined;
+        }
+        // getNormalizedPathComponents includes the separator for the root component.
+        // We need to remove to create our regex correctly.
+        components[0] = removeTrailingDirectorySeparator(components[0]);
+        if (isImplicitGlob(lastComponent)) {
+            components.push("**", "*");
+        }
+        var optionalCount = 0;
+        for (var _i = 0, components_1 = components; _i < components_1.length; _i++) {
+            var component = components_1[_i];
+            if (component === "**") {
+                if (hasRecursiveDirectoryWildcard) {
+                    return undefined;
+                }
+                subpattern += doubleAsteriskRegexFragment;
+                hasRecursiveDirectoryWildcard = true;
             }
-            var subpattern = "";
-            var hasRecursiveDirectoryWildcard = false;
-            var hasWrittenComponent = false;
-            var components = getNormalizedPathComponents(spec, basePath);
-            if (usage !== "exclude" && components[components.length - 1] === "**") {
-                continue spec;
-            }
-            // getNormalizedPathComponents includes the separator for the root component.
-            // We need to remove to create our regex correctly.
-            components[0] = removeTrailingDirectorySeparator(components[0]);
-            var optionalCount = 0;
-            for (var _a = 0, components_1 = components; _a < components_1.length; _a++) {
-                var component = components_1[_a];
-                if (component === "**") {
-                    if (hasRecursiveDirectoryWildcard) {
-                        continue spec;
-                    }
-                    subpattern += doubleAsteriskRegexFragment;
-                    hasRecursiveDirectoryWildcard = true;
-                    hasWrittenComponent = true;
+            else {
+                if (usage === "directories") {
+                    subpattern += "(";
+                    optionalCount++;
                 }
-                else {
-                    if (usage === "directories") {
-                        subpattern += "(";
-                        optionalCount++;
-                    }
-                    if (hasWrittenComponent) {
-                        subpattern += ts.directorySeparator;
+                if (hasWrittenComponent) {
+                    subpattern += ts.directorySeparator;
+                }
+                if (usage !== "exclude") {
+                    // The * and ? wildcards should not match directories or files that start with . if they
+                    // appear first in a component. Dotted directories and files can be included explicitly
+                    // like so: **/.*/.*
+                    if (component.charCodeAt(0) === 42 /* asterisk */) {
+                        subpattern += "([^./]" + singleAsteriskRegexFragment + ")?";
+                        component = component.substr(1);
                     }
-                    if (usage !== "exclude") {
-                        // The * and ? wildcards should not match directories or files that start with . if they
-                        // appear first in a component. Dotted directories and files can be included explicitly
-                        // like so: **/.*/.*
-                        if (component.charCodeAt(0) === 42 /* asterisk */) {
-                            subpattern += "([^./]" + singleAsteriskRegexFragment + ")?";
-                            component = component.substr(1);
-                        }
-                        else if (component.charCodeAt(0) === 63 /* question */) {
-                            subpattern += "[^./]";
-                            component = component.substr(1);
-                        }
+                    else if (component.charCodeAt(0) === 63 /* question */) {
+                        subpattern += "[^./]";
+                        component = component.substr(1);
                     }
-                    subpattern += component.replace(reservedCharacterPattern, replaceWildcardCharacter);
-                    hasWrittenComponent = true;
                 }
+                subpattern += component.replace(reservedCharacterPattern, replaceWildcardCharacter);
             }
-            while (optionalCount > 0) {
-                subpattern += ")?";
-                optionalCount--;
-            }
-            if (hasWrittenSubpattern) {
-                pattern += "|";
-            }
-            pattern += "(" + subpattern + ")";
-            hasWrittenSubpattern = true;
+            hasWrittenComponent = true;
         }
-        if (!pattern) {
-            return undefined;
+        while (optionalCount > 0) {
+            subpattern += ")?";
+            optionalCount--;
         }
-        return "^(" + pattern + (usage === "exclude" ? ")($|/)" : ")$");
+        return subpattern;
     }
-    ts.getRegularExpressionForWildcard = getRegularExpressionForWildcard;
     function replaceWildCardCharacterFiles(match) {
         return replaceWildcardCharacter(match, singleAsteriskRegexFragmentFiles);
     }
@@ -2598,11 +3154,12 @@ var ts;
     function replaceWildcardCharacter(match, singleAsteriskRegexFragment) {
         return match === "*" ? singleAsteriskRegexFragment : match === "?" ? "[^/]" : "\\" + match;
     }
-    function getFileMatcherPatterns(path, extensions, excludes, includes, useCaseSensitiveFileNames, currentDirectory) {
+    function getFileMatcherPatterns(path, excludes, includes, useCaseSensitiveFileNames, currentDirectory) {
         path = normalizePath(path);
         currentDirectory = normalizePath(currentDirectory);
         var absolutePath = combinePaths(currentDirectory, path);
         return {
+            includeFilePatterns: map(getRegularExpressionsForWildcards(includes, absolutePath, "files"), function (pattern) { return "^" + pattern + "$"; }),
             includeFilePattern: getRegularExpressionForWildcard(includes, absolutePath, "files"),
             includeDirectoryPattern: getRegularExpressionForWildcard(includes, absolutePath, "directories"),
             excludePattern: getRegularExpressionForWildcard(excludes, absolutePath, "exclude"),
@@ -2613,28 +3170,44 @@ var ts;
     function matchFiles(path, extensions, excludes, includes, useCaseSensitiveFileNames, currentDirectory, getFileSystemEntries) {
         path = normalizePath(path);
         currentDirectory = normalizePath(currentDirectory);
-        var patterns = getFileMatcherPatterns(path, extensions, excludes, includes, useCaseSensitiveFileNames, currentDirectory);
+        var patterns = getFileMatcherPatterns(path, excludes, includes, useCaseSensitiveFileNames, currentDirectory);
         var regexFlag = useCaseSensitiveFileNames ? "" : "i";
-        var includeFileRegex = patterns.includeFilePattern && new RegExp(patterns.includeFilePattern, regexFlag);
+        var includeFileRegexes = patterns.includeFilePatterns && patterns.includeFilePatterns.map(function (pattern) { return new RegExp(pattern, regexFlag); });
         var includeDirectoryRegex = patterns.includeDirectoryPattern && new RegExp(patterns.includeDirectoryPattern, regexFlag);
         var excludeRegex = patterns.excludePattern && new RegExp(patterns.excludePattern, regexFlag);
-        var result = [];
+        // Associate an array of results with each include regex. This keeps results in order of the "include" order.
+        // If there are no "includes", then just put everything in results[0].
+        var results = includeFileRegexes ? includeFileRegexes.map(function () { return []; }) : [[]];
+        var comparer = useCaseSensitiveFileNames ? compareStrings : compareStringsCaseInsensitive;
         for (var _i = 0, _a = patterns.basePaths; _i < _a.length; _i++) {
             var basePath = _a[_i];
             visitDirectory(basePath, combinePaths(currentDirectory, basePath));
         }
-        return result;
+        return flatten(results);
         function visitDirectory(path, absolutePath) {
             var _a = getFileSystemEntries(path), files = _a.files, directories = _a.directories;
-            for (var _i = 0, files_1 = files; _i < files_1.length; _i++) {
-                var current = files_1[_i];
+            files = files.slice().sort(comparer);
+            directories = directories.slice().sort(comparer);
+            var _loop_1 = function (current) {
                 var name_1 = combinePaths(path, current);
                 var absoluteName = combinePaths(absolutePath, current);
-                if ((!extensions || fileExtensionIsAny(name_1, extensions)) &&
-                    (!includeFileRegex || includeFileRegex.test(absoluteName)) &&
-                    (!excludeRegex || !excludeRegex.test(absoluteName))) {
-                    result.push(name_1);
+                if (extensions && !fileExtensionIsOneOf(name_1, extensions))
+                    return "continue";
+                if (excludeRegex && excludeRegex.test(absoluteName))
+                    return "continue";
+                if (!includeFileRegexes) {
+                    results[0].push(name_1);
                 }
+                else {
+                    var includeIndex = findIndex(includeFileRegexes, function (re) { return re.test(absoluteName); });
+                    if (includeIndex !== -1) {
+                        results[includeIndex].push(name_1);
+                    }
+                }
+            };
+            for (var _i = 0, files_1 = files; _i < files_1.length; _i++) {
+                var current = files_1[_i];
+                _loop_1(current);
             }
             for (var _b = 0, directories_1 = directories; _b < directories_1.length; _b++) {
                 var current = directories_1[_b];
@@ -2662,29 +3235,35 @@ var ts;
                 // We also need to check the relative paths by converting them to absolute and normalizing
                 // in case they escape the base path (e.g "..\somedirectory")
                 var absolute = isRootedDiskPath(include) ? include : normalizePath(combinePaths(path, include));
-                var wildcardOffset = indexOfAnyCharCode(absolute, wildcardCharCodes);
-                var includeBasePath = wildcardOffset < 0
-                    ? removeTrailingDirectorySeparator(getDirectoryPath(absolute))
-                    : absolute.substring(0, absolute.lastIndexOf(ts.directorySeparator, wildcardOffset));
                 // Append the literal and canonical candidate base paths.
-                includeBasePaths.push(includeBasePath);
+                includeBasePaths.push(getIncludeBasePath(absolute));
             }
             // Sort the offsets array using either the literal or canonical path representations.
             includeBasePaths.sort(useCaseSensitiveFileNames ? compareStrings : compareStringsCaseInsensitive);
+            var _loop_2 = function (includeBasePath) {
+                if (ts.every(basePaths, function (basePath) { return !containsPath(basePath, includeBasePath, path, !useCaseSensitiveFileNames); })) {
+                    basePaths.push(includeBasePath);
+                }
+            };
             // Iterate over each include base path and include unique base paths that are not a
             // subpath of an existing base path
-            include: for (var i = 0; i < includeBasePaths.length; i++) {
-                var includeBasePath = includeBasePaths[i];
-                for (var j = 0; j < basePaths.length; j++) {
-                    if (containsPath(basePaths[j], includeBasePath, path, !useCaseSensitiveFileNames)) {
-                        continue include;
-                    }
-                }
-                basePaths.push(includeBasePath);
+            for (var _a = 0, includeBasePaths_1 = includeBasePaths; _a < includeBasePaths_1.length; _a++) {
+                var includeBasePath = includeBasePaths_1[_a];
+                _loop_2(includeBasePath);
             }
         }
         return basePaths;
     }
+    function getIncludeBasePath(absolute) {
+        var wildcardOffset = indexOfAnyCharCode(absolute, wildcardCharCodes);
+        if (wildcardOffset < 0) {
+            // No "*" or "?" in the path
+            return !hasExtension(absolute)
+                ? absolute
+                : removeTrailingDirectorySeparator(getDirectoryPath(absolute));
+        }
+        return absolute.substring(0, absolute.lastIndexOf(ts.directorySeparator, wildcardOffset));
+    }
     function ensureScriptKind(fileName, scriptKind) {
         // Using scriptKind as a condition handles both:
         // - 'scriptKind' is unspecified and thus it is `undefined`
@@ -2698,14 +3277,16 @@ var ts;
     function getScriptKindFromFileName(fileName) {
         var ext = fileName.substr(fileName.lastIndexOf("."));
         switch (ext.toLowerCase()) {
-            case ".js":
+            case ".js" /* Js */:
                 return 1 /* JS */;
-            case ".jsx":
+            case ".jsx" /* Jsx */:
                 return 2 /* JSX */;
-            case ".ts":
+            case ".ts" /* Ts */:
                 return 3 /* TS */;
-            case ".tsx":
+            case ".tsx" /* Tsx */:
                 return 4 /* TSX */;
+            case ".json":
+                return 6 /* JSON */;
             default:
                 return 0 /* Unknown */;
         }
@@ -2714,13 +3295,24 @@ var ts;
     /**
      *  List of supported extensions in order of file resolution precedence.
      */
-    ts.supportedTypeScriptExtensions = [".ts", ".tsx", ".d.ts"];
+    ts.supportedTypeScriptExtensions = [".ts" /* Ts */, ".tsx" /* Tsx */, ".d.ts" /* Dts */];
     /** Must have ".d.ts" first because if ".ts" goes first, that will be detected as the extension instead of ".d.ts". */
-    ts.supportedTypescriptExtensionsForExtractExtension = [".d.ts", ".ts", ".tsx"];
-    ts.supportedJavascriptExtensions = [".js", ".jsx"];
+    ts.supportedTypescriptExtensionsForExtractExtension = [".d.ts" /* Dts */, ".ts" /* Ts */, ".tsx" /* Tsx */];
+    ts.supportedJavascriptExtensions = [".js" /* Js */, ".jsx" /* Jsx */];
     var allSupportedExtensions = ts.supportedTypeScriptExtensions.concat(ts.supportedJavascriptExtensions);
-    function getSupportedExtensions(options) {
-        return options && options.allowJs ? allSupportedExtensions : ts.supportedTypeScriptExtensions;
+    function getSupportedExtensions(options, extraFileExtensions) {
+        var needAllExtensions = options && options.allowJs;
+        if (!extraFileExtensions || extraFileExtensions.length === 0 || !needAllExtensions) {
+            return needAllExtensions ? allSupportedExtensions : ts.supportedTypeScriptExtensions;
+        }
+        var extensions = allSupportedExtensions.slice(0);
+        for (var _i = 0, extraFileExtensions_1 = extraFileExtensions; _i < extraFileExtensions_1.length; _i++) {
+            var extInfo = extraFileExtensions_1[_i];
+            if (extensions.indexOf(extInfo.extension) === -1) {
+                extensions.push(extInfo.extension);
+            }
+        }
+        return extensions;
     }
     ts.getSupportedExtensions = getSupportedExtensions;
     function hasJavaScriptFileExtension(fileName) {
@@ -2731,11 +3323,11 @@ var ts;
         return forEach(ts.supportedTypeScriptExtensions, function (extension) { return fileExtensionIs(fileName, extension); });
     }
     ts.hasTypeScriptFileExtension = hasTypeScriptFileExtension;
-    function isSupportedSourceFileName(fileName, compilerOptions) {
+    function isSupportedSourceFileName(fileName, compilerOptions, extraFileExtensions) {
         if (!fileName) {
             return false;
         }
-        for (var _i = 0, _a = getSupportedExtensions(compilerOptions); _i < _a.length; _i++) {
+        for (var _i = 0, _a = getSupportedExtensions(compilerOptions, extraFileExtensions); _i < _a.length; _i++) {
             var extension = _a[_i];
             if (fileExtensionIs(fileName, extension)) {
                 return true;
@@ -2749,18 +3341,17 @@ var ts;
      * aligned to the offset of the highest priority extension in the
      * allSupportedExtensions array.
      */
+    var ExtensionPriority;
     (function (ExtensionPriority) {
         ExtensionPriority[ExtensionPriority["TypeScriptFiles"] = 0] = "TypeScriptFiles";
         ExtensionPriority[ExtensionPriority["DeclarationAndJavaScriptFiles"] = 2] = "DeclarationAndJavaScriptFiles";
-        ExtensionPriority[ExtensionPriority["Limit"] = 5] = "Limit";
         ExtensionPriority[ExtensionPriority["Highest"] = 0] = "Highest";
         ExtensionPriority[ExtensionPriority["Lowest"] = 2] = "Lowest";
-    })(ts.ExtensionPriority || (ts.ExtensionPriority = {}));
-    var ExtensionPriority = ts.ExtensionPriority;
+    })(ExtensionPriority = ts.ExtensionPriority || (ts.ExtensionPriority = {}));
     function getExtensionPriority(path, supportedExtensions) {
         for (var i = supportedExtensions.length - 1; i >= 0; i--) {
             if (fileExtensionIs(path, supportedExtensions[i])) {
-                return adjustExtensionPriority(i);
+                return adjustExtensionPriority(i, supportedExtensions);
             }
         }
         // If its not in the list of supported extensions, this is likely a
@@ -2771,31 +3362,31 @@ var ts;
     /**
      * Adjusts an extension priority to be the highest priority within the same range.
      */
-    function adjustExtensionPriority(extensionPriority) {
+    function adjustExtensionPriority(extensionPriority, supportedExtensions) {
         if (extensionPriority < 2 /* DeclarationAndJavaScriptFiles */) {
             return 0 /* TypeScriptFiles */;
         }
-        else if (extensionPriority < 5 /* Limit */) {
+        else if (extensionPriority < supportedExtensions.length) {
             return 2 /* DeclarationAndJavaScriptFiles */;
         }
         else {
-            return 5 /* Limit */;
+            return supportedExtensions.length;
         }
     }
     ts.adjustExtensionPriority = adjustExtensionPriority;
     /**
      * Gets the next lowest extension priority for a given priority.
      */
-    function getNextLowestExtensionPriority(extensionPriority) {
+    function getNextLowestExtensionPriority(extensionPriority, supportedExtensions) {
         if (extensionPriority < 2 /* DeclarationAndJavaScriptFiles */) {
             return 2 /* DeclarationAndJavaScriptFiles */;
         }
         else {
-            return 5 /* Limit */;
+            return supportedExtensions.length;
         }
     }
     ts.getNextLowestExtensionPriority = getNextLowestExtensionPriority;
-    var extensionsToRemove = [".d.ts", ".ts", ".js", ".tsx", ".jsx"];
+    var extensionsToRemove = [".d.ts" /* Dts */, ".ts" /* Ts */, ".js" /* Js */, ".tsx" /* Tsx */, ".jsx" /* Jsx */];
     function removeFileExtension(path) {
         for (var _i = 0, extensionsToRemove_1 = extensionsToRemove; _i < extensionsToRemove_1.length; _i++) {
             var ext = extensionsToRemove_1[_i];
@@ -2815,10 +3406,6 @@ var ts;
         return path.substring(0, path.length - extension.length);
     }
     ts.removeExtension = removeExtension;
-    function isJsxOrTsxExtension(ext) {
-        return ext === ".jsx" || ext === ".tsx";
-    }
-    ts.isJsxOrTsxExtension = isJsxOrTsxExtension;
     function changeExtension(path, newExtension) {
         return (removeFileExtension(path) + newExtension);
     }
@@ -2830,8 +3417,11 @@ var ts;
     }
     function Type(checker, flags) {
         this.flags = flags;
+        if (Debug.isDebugging) {
+            this.checker = checker;
+        }
     }
-    function Signature(checker) {
+    function Signature() {
     }
     function Node(kind, pos, end) {
         this.id = 0;
@@ -2844,6 +3434,11 @@ var ts;
         this.parent = undefined;
         this.original = undefined;
     }
+    function SourceMapSource(fileName, text, skipTrivia) {
+        this.fileName = fileName;
+        this.text = text;
+        this.skipTrivia = skipTrivia || (function (pos) { return pos; });
+    }
     ts.objectAllocator = {
         getNodeConstructor: function () { return Node; },
         getTokenConstructor: function () { return Node; },
@@ -2851,62 +3446,69 @@ var ts;
         getSourceFileConstructor: function () { return Node; },
         getSymbolConstructor: function () { return Symbol; },
         getTypeConstructor: function () { return Type; },
-        getSignatureConstructor: function () { return Signature; }
+        getSignatureConstructor: function () { return Signature; },
+        getSourceMapSourceConstructor: function () { return SourceMapSource; },
     };
+    var AssertionLevel;
     (function (AssertionLevel) {
         AssertionLevel[AssertionLevel["None"] = 0] = "None";
         AssertionLevel[AssertionLevel["Normal"] = 1] = "Normal";
         AssertionLevel[AssertionLevel["Aggressive"] = 2] = "Aggressive";
         AssertionLevel[AssertionLevel["VeryAggressive"] = 3] = "VeryAggressive";
-    })(ts.AssertionLevel || (ts.AssertionLevel = {}));
-    var AssertionLevel = ts.AssertionLevel;
+    })(AssertionLevel = ts.AssertionLevel || (ts.AssertionLevel = {}));
     var Debug;
     (function (Debug) {
-        var currentAssertionLevel;
+        Debug.currentAssertionLevel = 0 /* None */;
+        Debug.isDebugging = false;
         function shouldAssert(level) {
-            return getCurrentAssertionLevel() >= level;
+            return Debug.currentAssertionLevel >= level;
         }
         Debug.shouldAssert = shouldAssert;
-        function assert(expression, message, verboseDebugInfo) {
+        function assert(expression, message, verboseDebugInfo, stackCrawlMark) {
             if (!expression) {
-                var verboseDebugString = "";
                 if (verboseDebugInfo) {
-                    verboseDebugString = "\r\nVerbose Debug Information: " + verboseDebugInfo();
+                    message += "\r\nVerbose Debug Information: " + verboseDebugInfo();
                 }
-                debugger;
-                throw new Error("Debug Failure. False expression: " + (message || "") + verboseDebugString);
+                fail(message ? "False expression: " + message : "False expression.", stackCrawlMark || assert);
             }
         }
         Debug.assert = assert;
-        function fail(message) {
-            Debug.assert(/*expression*/ false, message);
+        function fail(message, stackCrawlMark) {
+            debugger;
+            var e = new Error(message ? "Debug Failure. " : "Debug Failure.");
+            if (Error.captureStackTrace) {
+                Error.captureStackTrace(e, stackCrawlMark || fail);
+            }
+            throw e;
         }
         Debug.fail = fail;
-        function getCurrentAssertionLevel() {
-            if (currentAssertionLevel !== undefined) {
-                return currentAssertionLevel;
+        function getFunctionName(func) {
+            if (typeof func !== "function") {
+                return "";
             }
-            if (ts.sys === undefined) {
-                return 0 /* None */;
+            else if (func.hasOwnProperty("name")) {
+                return func.name;
+            }
+            else {
+                var text = Function.prototype.toString.call(func);
+                var match = /^function\s+([\w\$]+)\s*\(/.exec(text);
+                return match ? match[1] : "";
             }
-            var developmentMode = /^development$/i.test(getEnvironmentVariable("NODE_ENV"));
-            currentAssertionLevel = developmentMode
-                ? 1 /* Normal */
-                : 0 /* None */;
-            return currentAssertionLevel;
         }
+        Debug.getFunctionName = getFunctionName;
     })(Debug = ts.Debug || (ts.Debug = {}));
-    function getEnvironmentVariable(name, host) {
-        if (host && host.getEnvironmentVariable) {
-            return host.getEnvironmentVariable(name);
-        }
-        if (ts.sys && ts.sys.getEnvironmentVariable) {
-            return ts.sys.getEnvironmentVariable(name);
+    /** Remove an item from an array, moving everything to its right one space left. */
+    function orderedRemoveItem(array, item) {
+        for (var i = 0; i < array.length; i++) {
+            if (array[i] === item) {
+                orderedRemoveItemAt(array, i);
+                return true;
+            }
         }
-        return "";
+        return false;
     }
-    ts.getEnvironmentVariable = getEnvironmentVariable;
-    /** Remove an item from an array, moving everything to its right one space left. */
+    ts.orderedRemoveItem = orderedRemoveItem;
+    /** Remove an item by index from an array, moving everything to its right one space left. */
     function orderedRemoveItemAt(array, index) {
         // This seems to be faster than either `array.splice(i, 1)` or `array.copyWithin(i, i+ 1)`.
         for (var i = index; i < array.length - 1; i++) {
@@ -3019,144 +3621,51 @@ var ts;
         return !(pos >= 0);
     }
     ts.positionIsSynthesized = positionIsSynthesized;
+    /** True if an extension is one of the supported TypeScript extensions. */
+    function extensionIsTypeScript(ext) {
+        return ext === ".ts" /* Ts */ || ext === ".tsx" /* Tsx */ || ext === ".d.ts" /* Dts */;
+    }
+    ts.extensionIsTypeScript = extensionIsTypeScript;
+    /**
+     * Gets the extension from a path.
+     * Path must have a valid extension.
+     */
+    function extensionFromPath(path) {
+        var ext = tryGetExtensionFromPath(path);
+        if (ext !== undefined) {
+            return ext;
+        }
+        Debug.fail("File " + path + " has unknown extension.");
+    }
+    ts.extensionFromPath = extensionFromPath;
+    function tryGetExtensionFromPath(path) {
+        return find(ts.supportedTypescriptExtensionsForExtractExtension, function (e) { return fileExtensionIs(path, e); }) || find(ts.supportedJavascriptExtensions, function (e) { return fileExtensionIs(path, e); });
+    }
+    ts.tryGetExtensionFromPath = tryGetExtensionFromPath;
+    function isCheckJsEnabledForFile(sourceFile, compilerOptions) {
+        return sourceFile.checkJsDirective ? sourceFile.checkJsDirective.enabled : compilerOptions.checkJs;
+    }
+    ts.isCheckJsEnabledForFile = isCheckJsEnabledForFile;
 })(ts || (ts = {}));
 /// <reference path="core.ts"/>
 var ts;
 (function (ts) {
-    ts.sys = (function () {
-        function getWScriptSystem() {
-            var fso = new ActiveXObject("Scripting.FileSystemObject");
-            var shell = new ActiveXObject("WScript.Shell");
-            var fileStream = new ActiveXObject("ADODB.Stream");
-            fileStream.Type = 2 /*text*/;
-            var binaryStream = new ActiveXObject("ADODB.Stream");
-            binaryStream.Type = 1 /*binary*/;
-            var args = [];
-            for (var i = 0; i < WScript.Arguments.length; i++) {
-                args[i] = WScript.Arguments.Item(i);
-            }
-            function readFile(fileName, encoding) {
-                if (!fso.FileExists(fileName)) {
-                    return undefined;
-                }
-                fileStream.Open();
-                try {
-                    if (encoding) {
-                        fileStream.Charset = encoding;
-                        fileStream.LoadFromFile(fileName);
-                    }
-                    else {
-                        // Load file and read the first two bytes into a string with no interpretation
-                        fileStream.Charset = "x-ansi";
-                        fileStream.LoadFromFile(fileName);
-                        var bom = fileStream.ReadText(2) || "";
-                        // Position must be at 0 before encoding can be changed
-                        fileStream.Position = 0;
-                        // [0xFF,0xFE] and [0xFE,0xFF] mean utf-16 (little or big endian), otherwise default to utf-8
-                        fileStream.Charset = bom.length >= 2 && (bom.charCodeAt(0) === 0xFF && bom.charCodeAt(1) === 0xFE || bom.charCodeAt(0) === 0xFE && bom.charCodeAt(1) === 0xFF) ? "unicode" : "utf-8";
-                    }
-                    // ReadText method always strips byte order mark from resulting string
-                    return fileStream.ReadText();
-                }
-                catch (e) {
-                    throw e;
-                }
-                finally {
-                    fileStream.Close();
-                }
-            }
-            function writeFile(fileName, data, writeByteOrderMark) {
-                fileStream.Open();
-                binaryStream.Open();
-                try {
-                    // Write characters in UTF-8 encoding
-                    fileStream.Charset = "utf-8";
-                    fileStream.WriteText(data);
-                    // If we don't want the BOM, then skip it by setting the starting location to 3 (size of BOM).
-                    // If not, start from position 0, as the BOM will be added automatically when charset==utf8.
-                    if (writeByteOrderMark) {
-                        fileStream.Position = 0;
-                    }
-                    else {
-                        fileStream.Position = 3;
-                    }
-                    fileStream.CopyTo(binaryStream);
-                    binaryStream.SaveToFile(fileName, 2 /*overwrite*/);
-                }
-                finally {
-                    binaryStream.Close();
-                    fileStream.Close();
-                }
-            }
-            function getNames(collection) {
-                var result = [];
-                for (var e = new Enumerator(collection); !e.atEnd(); e.moveNext()) {
-                    result.push(e.item().Name);
-                }
-                return result.sort();
-            }
-            function getDirectories(path) {
-                var folder = fso.GetFolder(path);
-                return getNames(folder.subfolders);
-            }
-            function getAccessibleFileSystemEntries(path) {
-                try {
-                    var folder = fso.GetFolder(path || ".");
-                    var files = getNames(folder.files);
-                    var directories = getNames(folder.subfolders);
-                    return { files: files, directories: directories };
-                }
-                catch (e) {
-                    return { files: [], directories: [] };
-                }
-            }
-            function readDirectory(path, extensions, excludes, includes) {
-                return ts.matchFiles(path, extensions, excludes, includes, /*useCaseSensitiveFileNames*/ false, shell.CurrentDirectory, getAccessibleFileSystemEntries);
-            }
-            var wscriptSystem = {
-                args: args,
-                newLine: "\r\n",
-                useCaseSensitiveFileNames: false,
-                write: function (s) {
-                    WScript.StdOut.Write(s);
-                },
-                readFile: readFile,
-                writeFile: writeFile,
-                resolvePath: function (path) {
-                    return fso.GetAbsolutePathName(path);
-                },
-                fileExists: function (path) {
-                    return fso.FileExists(path);
-                },
-                directoryExists: function (path) {
-                    return fso.FolderExists(path);
-                },
-                createDirectory: function (directoryName) {
-                    if (!wscriptSystem.directoryExists(directoryName)) {
-                        fso.CreateFolder(directoryName);
-                    }
-                },
-                getExecutingFilePath: function () {
-                    return WScript.ScriptFullName;
-                },
-                getCurrentDirectory: function () {
-                    return shell.CurrentDirectory;
-                },
-                getDirectories: getDirectories,
-                getEnvironmentVariable: function (name) {
-                    return new ActiveXObject("WScript.Shell").ExpandEnvironmentStrings("%" + name + "%");
-                },
-                readDirectory: readDirectory,
-                exit: function (exitCode) {
-                    try {
-                        WScript.Quit(exitCode);
-                    }
-                    catch (e) {
-                    }
-                }
-            };
-            return wscriptSystem;
+    function getNodeMajorVersion() {
+        if (typeof process === "undefined") {
+            return undefined;
         }
+        var version = process.version;
+        if (!version) {
+            return undefined;
+        }
+        var dot = version.indexOf(".");
+        if (dot === -1) {
+            return undefined;
+        }
+        return parseInt(version.substring(1, dot));
+    }
+    ts.getNodeMajorVersion = getNodeMajorVersion;
+    ts.sys = (function () {
         function getNodeSystem() {
             var _fs = require("fs");
             var _path = require("path");
@@ -3166,32 +3675,32 @@ var ts;
             function createWatchedFileSet() {
                 var dirWatchers = ts.createMap();
                 // One file can have multiple watchers
-                var fileWatcherCallbacks = ts.createMap();
+                var fileWatcherCallbacks = ts.createMultiMap();
                 return { addFile: addFile, removeFile: removeFile };
                 function reduceDirWatcherRefCountForFile(fileName) {
                     var dirName = ts.getDirectoryPath(fileName);
-                    var watcher = dirWatchers[dirName];
+                    var watcher = dirWatchers.get(dirName);
                     if (watcher) {
                         watcher.referenceCount -= 1;
                         if (watcher.referenceCount <= 0) {
                             watcher.close();
-                            delete dirWatchers[dirName];
+                            dirWatchers.delete(dirName);
                         }
                     }
                 }
                 function addDirWatcher(dirPath) {
-                    var watcher = dirWatchers[dirPath];
+                    var watcher = dirWatchers.get(dirPath);
                     if (watcher) {
                         watcher.referenceCount += 1;
                         return;
                     }
                     watcher = _fs.watch(dirPath, { persistent: true }, function (eventName, relativeFileName) { return fileEventHandler(eventName, relativeFileName, dirPath); });
                     watcher.referenceCount = 1;
-                    dirWatchers[dirPath] = watcher;
+                    dirWatchers.set(dirPath, watcher);
                     return;
                 }
                 function addFileWatcherCallback(filePath, callback) {
-                    ts.multiMapAdd(fileWatcherCallbacks, filePath, callback);
+                    fileWatcherCallbacks.add(filePath, callback);
                 }
                 function addFile(fileName, callback) {
                     addFileWatcherCallback(fileName, callback);
@@ -3203,7 +3712,7 @@ var ts;
                     reduceDirWatcherRefCountForFile(watchedFile.fileName);
                 }
                 function removeFileWatcherCallback(filePath, callback) {
-                    ts.multiMapRemove(fileWatcherCallbacks, filePath, callback);
+                    fileWatcherCallbacks.remove(filePath, callback);
                 }
                 function fileEventHandler(eventName, relativeFileName, baseDirPath) {
                     // When files are deleted from disk, the triggered "rename" event would have a relativefileName of "undefined"
@@ -3211,22 +3720,32 @@ var ts;
                         ? undefined
                         : ts.getNormalizedAbsolutePath(relativeFileName, baseDirPath);
                     // Some applications save a working file via rename operations
-                    if ((eventName === "change" || eventName === "rename") && fileWatcherCallbacks[fileName]) {
-                        for (var _i = 0, _a = fileWatcherCallbacks[fileName]; _i < _a.length; _i++) {
-                            var fileCallback = _a[_i];
-                            fileCallback(fileName);
+                    if ((eventName === "change" || eventName === "rename")) {
+                        var callbacks = fileWatcherCallbacks.get(fileName);
+                        if (callbacks) {
+                            for (var _i = 0, callbacks_1 = callbacks; _i < callbacks_1.length; _i++) {
+                                var fileCallback = callbacks_1[_i];
+                                fileCallback(fileName);
+                            }
                         }
                     }
                 }
             }
             var watchedFileSet = createWatchedFileSet();
-            function isNode4OrLater() {
-                return parseInt(process.version.charAt(1)) >= 4;
+            var nodeVersion = getNodeMajorVersion();
+            var isNode4OrLater = nodeVersion >= 4;
+            function isFileSystemCaseSensitive() {
+                // win32\win64 are case insensitive platforms
+                if (platform === "win32" || platform === "win64") {
+                    return false;
+                }
+                // convert current file name to upper case / lower case and check if file exists
+                // (guards against cases when name is already all uppercase or lowercase)
+                return !fileExists(__filename.toUpperCase()) || !fileExists(__filename.toLowerCase());
             }
             var platform = _os.platform();
-            // win32\win64 are case insensitive platforms, MacOS (darwin) by default is also case insensitive
-            var useCaseSensitiveFileNames = platform !== "win32" && platform !== "win64" && platform !== "darwin";
-            function readFile(fileName, encoding) {
+            var useCaseSensitiveFileNames = isFileSystemCaseSensitive();
+            function readFile(fileName, _encoding) {
                 if (!fileExists(fileName)) {
                     return undefined;
                 }
@@ -3235,7 +3754,7 @@ var ts;
                 if (len >= 2 && buffer[0] === 0xFE && buffer[1] === 0xFF) {
                     // Big endian UTF-16 byte order mark detected. Since big endian is not supported by node.js,
                     // flip all byte pairs and treat as little endian.
-                    len &= ~1;
+                    len &= ~1; // Round down to a multiple of 2
                     for (var i = 0; i < len; i += 2) {
                         var temp = buffer[i];
                         buffer[i] = buffer[i + 1];
@@ -3262,7 +3781,7 @@ var ts;
                 var fd;
                 try {
                     fd = _fs.openSync(fileName, "w");
-                    _fs.writeSync(fd, data, undefined, "utf8");
+                    _fs.writeSync(fd, data, /*position*/ undefined, "utf8");
                 }
                 finally {
                     if (fd !== undefined) {
@@ -3332,6 +3851,7 @@ var ts;
             function getDirectories(path) {
                 return ts.filter(_fs.readdirSync(path), function (dir) { return fileSystemEntryExists(ts.combinePaths(path, dir), 1 /* Directory */); });
             }
+            var noOpFileWatcher = { close: ts.noop };
             var nodeSystem = {
                 args: process.argv.slice(2),
                 newLine: _os.EOL,
@@ -3341,7 +3861,7 @@ var ts;
                 },
                 readFile: readFile,
                 writeFile: writeFile,
-                watchFile: function (fileName, callback) {
+                watchFile: function (fileName, callback, pollingInterval) {
                     if (useNonPollingWatchers) {
                         var watchedFile_1 = watchedFileSet.addFile(fileName, callback);
                         return {
@@ -3349,7 +3869,7 @@ var ts;
                         };
                     }
                     else {
-                        _fs.watchFile(fileName, { persistent: true, interval: 250 }, fileChanged);
+                        _fs.watchFile(fileName, { persistent: true, interval: pollingInterval || 250 }, fileChanged);
                         return {
                             close: function () { return _fs.unwatchFile(fileName, fileChanged); }
                         };
@@ -3365,7 +3885,11 @@ var ts;
                     // Node 4.0 `fs.watch` function supports the "recursive" option on both OSX and Windows
                     // (ref: https://github.com/nodejs/node/pull/2649 and https://github.com/Microsoft/TypeScript/issues/4643)
                     var options;
-                    if (isNode4OrLater() && (process.platform === "win32" || process.platform === "darwin")) {
+                    if (!directoryExists(directoryName)) {
+                        // do nothing if target folder does not exist
+                        return noOpFileWatcher;
+                    }
+                    if (isNode4OrLater && (process.platform === "win32" || process.platform === "darwin")) {
                         options = { persistent: true, recursive: !!recursive };
                     }
                     else {
@@ -3379,7 +3903,6 @@ var ts;
                             // When deleting a file, the passed baseFileName is null
                             callback(!relativeFileName ? relativeFileName : ts.normalizePath(ts.combinePaths(directoryName, relativeFileName)));
                         }
-                        ;
                     });
                 },
                 resolvePath: function (path) {
@@ -3438,13 +3961,17 @@ var ts;
                 realpath: function (path) {
                     return _fs.realpathSync(path);
                 },
+                debugMode: ts.some(process.execArgv, function (arg) { return /^--(inspect|debug)(-brk)?(=\d+)?$/i.test(arg); }),
                 tryEnableSourceMapsForHost: function () {
                     try {
                         require("source-map-support").install();
                     }
                     catch (e) {
+                        // Could not enable source maps.
                     }
-                }
+                },
+                setTimeout: setTimeout,
+                clearTimeout: clearTimeout
             };
             return nodeSystem;
         }
@@ -3455,7 +3982,7 @@ var ts;
                 args: ChakraHost.args,
                 useCaseSensitiveFileNames: !!ChakraHost.useCaseSensitiveFileNames,
                 write: ChakraHost.echo,
-                readFile: function (path, encoding) {
+                readFile: function (path, _encoding) {
                     // encoding is automatically handled by the implementation in ChakraHost
                     return ChakraHost.readFile(path);
                 },
@@ -3473,9 +4000,9 @@ var ts;
                 getExecutingFilePath: function () { return ChakraHost.executingFile; },
                 getCurrentDirectory: function () { return ChakraHost.currentDirectory; },
                 getDirectories: ChakraHost.getDirectories,
-                getEnvironmentVariable: ChakraHost.getEnvironmentVariable || (function (name) { return ""; }),
+                getEnvironmentVariable: ChakraHost.getEnvironmentVariable || (function () { return ""; }),
                 readDirectory: function (path, extensions, excludes, includes) {
-                    var pattern = ts.getFileMatcherPatterns(path, extensions, excludes, includes, !!ChakraHost.useCaseSensitiveFileNames, ChakraHost.currentDirectory);
+                    var pattern = ts.getFileMatcherPatterns(path, excludes, includes, !!ChakraHost.useCaseSensitiveFileNames, ChakraHost.currentDirectory);
                     return ChakraHost.readDirectory(path, extensions, pattern.basePaths, pattern.excludePattern, pattern.includeFilePattern, pattern.includeDirectoryPattern);
                 },
                 exit: ChakraHost.quit,
@@ -3496,9 +4023,6 @@ var ts;
         if (typeof ChakraHost !== "undefined") {
             sys = getChakraSystem();
         }
-        else if (typeof WScript !== "undefined" && typeof ActiveXObject === "function") {
-            sys = getWScriptSystem();
-        }
         else if (typeof process !== "undefined" && process.nextTick && !process.browser && typeof require !== "undefined") {
             // process and process.nextTick checks if current environment is node-like
             // process.browser check excludes webpack and browserify
@@ -3517,6 +4041,14 @@ var ts;
         }
         return sys;
     })();
+    if (ts.sys && ts.sys.getEnvironmentVariable) {
+        ts.Debug.currentAssertionLevel = /^development$/i.test(ts.sys.getEnvironmentVariable("NODE_ENV"))
+            ? 1 /* Normal */
+            : 0 /* None */;
+    }
+    if (ts.sys && ts.sys.debugMode) {
+        ts.Debug.isDebugging = true;
+    }
 })(ts || (ts = {}));
 /// <reference path="sys.ts" />
 /* @internal */
@@ -3536,6 +4068,19 @@ var ts;
         return undefined;
     }
     ts.getDeclarationOfKind = getDeclarationOfKind;
+    function findDeclaration(symbol, predicate) {
+        var declarations = symbol.declarations;
+        if (declarations) {
+            for (var _i = 0, declarations_2 = declarations; _i < declarations_2.length; _i++) {
+                var declaration = declarations_2[_i];
+                if (predicate(declaration)) {
+                    return declaration;
+                }
+            }
+        }
+        return undefined;
+    }
+    ts.findDeclaration = findDeclaration;
     // Pool writers to avoid needing to allocate them for every symbol we write.
     var stringWriters = [];
     function getSingleLineStringWriter() {
@@ -3550,15 +4095,17 @@ var ts;
                 writeSpace: writeText,
                 writeStringLiteral: writeText,
                 writeParameter: writeText,
+                writeProperty: writeText,
                 writeSymbol: writeText,
                 // Completely ignore indentation for string writers.  And map newlines to
                 // a single space.
                 writeLine: function () { return str_1 += " "; },
-                increaseIndent: function () { },
-                decreaseIndent: function () { },
+                increaseIndent: ts.noop,
+                decreaseIndent: ts.noop,
                 clear: function () { return str_1 = ""; },
-                trackSymbol: function () { },
-                reportInaccessibleThisError: function () { }
+                trackSymbol: ts.noop,
+                reportInaccessibleThisError: ts.noop,
+                reportPrivateInBaseOfClassExpression: ts.noop,
             };
         }
         return stringWriters.pop();
@@ -3573,47 +4120,33 @@ var ts;
         return node.end - node.pos;
     }
     ts.getFullWidth = getFullWidth;
-    function arrayIsEqualTo(array1, array2, equaler) {
-        if (!array1 || !array2) {
-            return array1 === array2;
-        }
-        if (array1.length !== array2.length) {
-            return false;
-        }
-        for (var i = 0; i < array1.length; i++) {
-            var equals = equaler ? equaler(array1[i], array2[i]) : array1[i] === array2[i];
-            if (!equals) {
-                return false;
-            }
-        }
-        return true;
-    }
-    ts.arrayIsEqualTo = arrayIsEqualTo;
     function hasResolvedModule(sourceFile, moduleNameText) {
-        return !!(sourceFile && sourceFile.resolvedModules && sourceFile.resolvedModules[moduleNameText]);
+        return !!(sourceFile && sourceFile.resolvedModules && sourceFile.resolvedModules.get(moduleNameText));
     }
     ts.hasResolvedModule = hasResolvedModule;
     function getResolvedModule(sourceFile, moduleNameText) {
-        return hasResolvedModule(sourceFile, moduleNameText) ? sourceFile.resolvedModules[moduleNameText] : undefined;
+        return hasResolvedModule(sourceFile, moduleNameText) ? sourceFile.resolvedModules.get(moduleNameText) : undefined;
     }
     ts.getResolvedModule = getResolvedModule;
     function setResolvedModule(sourceFile, moduleNameText, resolvedModule) {
         if (!sourceFile.resolvedModules) {
             sourceFile.resolvedModules = ts.createMap();
         }
-        sourceFile.resolvedModules[moduleNameText] = resolvedModule;
+        sourceFile.resolvedModules.set(moduleNameText, resolvedModule);
     }
     ts.setResolvedModule = setResolvedModule;
     function setResolvedTypeReferenceDirective(sourceFile, typeReferenceDirectiveName, resolvedTypeReferenceDirective) {
         if (!sourceFile.resolvedTypeReferenceDirectiveNames) {
             sourceFile.resolvedTypeReferenceDirectiveNames = ts.createMap();
         }
-        sourceFile.resolvedTypeReferenceDirectiveNames[typeReferenceDirectiveName] = resolvedTypeReferenceDirective;
+        sourceFile.resolvedTypeReferenceDirectiveNames.set(typeReferenceDirectiveName, resolvedTypeReferenceDirective);
     }
     ts.setResolvedTypeReferenceDirective = setResolvedTypeReferenceDirective;
     /* @internal */
     function moduleResolutionIsEqualTo(oldResolution, newResolution) {
-        return oldResolution.resolvedFileName === newResolution.resolvedFileName && oldResolution.isExternalLibraryImport === newResolution.isExternalLibraryImport;
+        return oldResolution.isExternalLibraryImport === newResolution.isExternalLibraryImport &&
+            oldResolution.extension === newResolution.extension &&
+            oldResolution.resolvedFileName === newResolution.resolvedFileName;
     }
     ts.moduleResolutionIsEqualTo = moduleResolutionIsEqualTo;
     /* @internal */
@@ -3623,12 +4156,10 @@ var ts;
     ts.typeDirectiveIsEqualTo = typeDirectiveIsEqualTo;
     /* @internal */
     function hasChangesInResolutions(names, newResolutions, oldResolutions, comparer) {
-        if (names.length !== newResolutions.length) {
-            return false;
-        }
+        ts.Debug.assert(names.length === newResolutions.length);
         for (var i = 0; i < names.length; i++) {
             var newResolution = newResolutions[i];
-            var oldResolution = oldResolutions && oldResolutions[names[i]];
+            var oldResolution = oldResolutions && oldResolutions.get(names[i]);
             var changed = oldResolution
                 ? !newResolution || !comparer(oldResolution, newResolution)
                 : newResolution;
@@ -3642,28 +4173,28 @@ var ts;
     // Returns true if this node contains a parse error anywhere underneath it.
     function containsParseError(node) {
         aggregateChildData(node);
-        return (node.flags & 2097152 /* ThisNodeOrAnySubNodesHasError */) !== 0;
+        return (node.flags & 131072 /* ThisNodeOrAnySubNodesHasError */) !== 0;
     }
     ts.containsParseError = containsParseError;
     function aggregateChildData(node) {
-        if (!(node.flags & 4194304 /* HasAggregatedChildData */)) {
+        if (!(node.flags & 262144 /* HasAggregatedChildData */)) {
             // A node is considered to contain a parse error if:
             //  a) the parser explicitly marked that it had an error
             //  b) any of it's children reported that it had an error.
-            var thisNodeOrAnySubNodesHasError = ((node.flags & 524288 /* ThisNodeHasError */) !== 0) ||
+            var thisNodeOrAnySubNodesHasError = ((node.flags & 32768 /* ThisNodeHasError */) !== 0) ||
                 ts.forEachChild(node, containsParseError);
             // If so, mark ourselves accordingly.
             if (thisNodeOrAnySubNodesHasError) {
-                node.flags |= 2097152 /* ThisNodeOrAnySubNodesHasError */;
+                node.flags |= 131072 /* ThisNodeOrAnySubNodesHasError */;
             }
             // Also mark that we've propagated the child information to this node.  This way we can
             // always consult the bit directly on this node without needing to check its children
             // again.
-            node.flags |= 4194304 /* HasAggregatedChildData */;
+            node.flags |= 262144 /* HasAggregatedChildData */;
         }
     }
     function getSourceFileOfNode(node) {
-        while (node && node.kind !== 256 /* SourceFile */) {
+        while (node && node.kind !== 265 /* SourceFile */) {
             node = node.parent;
         }
         return node;
@@ -3671,11 +4202,11 @@ var ts;
     ts.getSourceFileOfNode = getSourceFileOfNode;
     function isStatementWithLocals(node) {
         switch (node.kind) {
-            case 199 /* Block */:
-            case 227 /* CaseBlock */:
-            case 206 /* ForStatement */:
-            case 207 /* ForInStatement */:
-            case 208 /* ForOfStatement */:
+            case 207 /* Block */:
+            case 235 /* CaseBlock */:
+            case 214 /* ForStatement */:
+            case 215 /* ForInStatement */:
+            case 216 /* ForOfStatement */:
                 return true;
         }
         return false;
@@ -3750,36 +4281,28 @@ var ts;
         return !nodeIsMissing(node);
     }
     ts.nodeIsPresent = nodeIsPresent;
-    function getTokenPosOfNode(node, sourceFile, includeJsDocComment) {
+    function getTokenPosOfNode(node, sourceFile, includeJsDoc) {
         // With nodes that have no width (i.e. 'Missing' nodes), we actually *don't*
         // want to skip trivia because this will launch us forward to the next token.
         if (nodeIsMissing(node)) {
             return node.pos;
         }
-        if (isJSDocNode(node)) {
+        if (ts.isJSDocNode(node)) {
             return ts.skipTrivia((sourceFile || getSourceFileOfNode(node)).text, node.pos, /*stopAfterLineBreak*/ false, /*stopAtComments*/ true);
         }
-        if (includeJsDocComment && node.jsDocComments && node.jsDocComments.length > 0) {
-            return getTokenPosOfNode(node.jsDocComments[0]);
+        if (includeJsDoc && node.jsDoc && node.jsDoc.length > 0) {
+            return getTokenPosOfNode(node.jsDoc[0]);
         }
         // For a syntax list, it is possible that one of its children has JSDocComment nodes, while
         // the syntax list itself considers them as normal trivia. Therefore if we simply skip
         // trivia for the list, we may have skipped the JSDocComment as well. So we should process its
         // first child to determine the actual position of its first token.
-        if (node.kind === 286 /* SyntaxList */ && node._children.length > 0) {
-            return getTokenPosOfNode(node._children[0], sourceFile, includeJsDocComment);
+        if (node.kind === 295 /* SyntaxList */ && node._children.length > 0) {
+            return getTokenPosOfNode(node._children[0], sourceFile, includeJsDoc);
         }
         return ts.skipTrivia((sourceFile || getSourceFileOfNode(node)).text, node.pos);
     }
     ts.getTokenPosOfNode = getTokenPosOfNode;
-    function isJSDocNode(node) {
-        return node.kind >= 257 /* FirstJSDocNode */ && node.kind <= 282 /* LastJSDocNode */;
-    }
-    ts.isJSDocNode = isJSDocNode;
-    function isJSDocTag(node) {
-        return node.kind >= 273 /* FirstJSDocTagNode */ && node.kind <= 285 /* LastJSDocTagNode */;
-    }
-    ts.isJSDocTag = isJSDocTag;
     function getNonDecoratorTokenPosOfNode(node, sourceFile) {
         if (nodeIsMissing(node) || !node.decorators) {
             return getTokenPosOfNode(node, sourceFile);
@@ -3808,66 +4331,49 @@ var ts;
         return getSourceTextOfNodeFromSourceFile(getSourceFileOfNode(node), node, includeTrivia);
     }
     ts.getTextOfNode = getTextOfNode;
-    function getLiteralText(node, sourceFile, languageVersion) {
-        // Any template literal or string literal with an extended escape
-        // (e.g. "\u{0067}") will need to be downleveled as a escaped string literal.
-        if (languageVersion < 2 /* ES6 */ && (isTemplateLiteralKind(node.kind) || node.hasExtendedUnicodeEscape)) {
-            return getQuotedEscapedLiteralText('"', node.text, '"');
-        }
+    /**
+     * Gets flags that control emit behavior of a node.
+     */
+    function getEmitFlags(node) {
+        var emitNode = node.emitNode;
+        return emitNode && emitNode.flags;
+    }
+    ts.getEmitFlags = getEmitFlags;
+    function getLiteralText(node, sourceFile) {
         // If we don't need to downlevel and we can reach the original source text using
         // the node's parent reference, then simply get the text as it was originally written.
         if (!nodeIsSynthesized(node) && node.parent) {
-            var text = getSourceTextOfNodeFromSourceFile(sourceFile, node);
-            if (languageVersion < 2 /* ES6 */ && isBinaryOrOctalIntegerLiteral(node, text)) {
-                return node.text;
-            }
-            return text;
+            return getSourceTextOfNodeFromSourceFile(sourceFile, node);
         }
+        var escapeText = getEmitFlags(node) & 16777216 /* NoAsciiEscaping */ ? escapeString : escapeNonAsciiString;
         // If we can't reach the original source text, use the canonical form if it's a number,
-        // or an escaped quoted form of the original text if it's string-like.
+        // or a (possibly escaped) quoted form of the original text if it's string-like.
         switch (node.kind) {
             case 9 /* StringLiteral */:
-                return getQuotedEscapedLiteralText('"', node.text, '"');
-            case 11 /* NoSubstitutionTemplateLiteral */:
-                return getQuotedEscapedLiteralText("`", node.text, "`");
-            case 12 /* TemplateHead */:
-                return getQuotedEscapedLiteralText("`", node.text, "${");
-            case 13 /* TemplateMiddle */:
-                return getQuotedEscapedLiteralText("}", node.text, "${");
-            case 14 /* TemplateTail */:
-                return getQuotedEscapedLiteralText("}", node.text, "`");
+                return '"' + escapeText(node.text) + '"';
+            case 13 /* NoSubstitutionTemplateLiteral */:
+                return "`" + escapeText(node.text) + "`";
+            case 14 /* TemplateHead */:
+                return "`" + escapeText(node.text) + "${";
+            case 15 /* TemplateMiddle */:
+                return "}" + escapeText(node.text) + "${";
+            case 16 /* TemplateTail */:
+                return "}" + escapeText(node.text) + "`";
             case 8 /* NumericLiteral */:
                 return node.text;
         }
         ts.Debug.fail("Literal kind '" + node.kind + "' not accounted for.");
     }
     ts.getLiteralText = getLiteralText;
-    function isBinaryOrOctalIntegerLiteral(node, text) {
-        if (node.kind === 8 /* NumericLiteral */ && text.length > 1) {
-            switch (text.charCodeAt(1)) {
-                case 98 /* b */:
-                case 66 /* B */:
-                case 111 /* o */:
-                case 79 /* O */:
-                    return true;
-            }
-        }
-        return false;
-    }
-    ts.isBinaryOrOctalIntegerLiteral = isBinaryOrOctalIntegerLiteral;
-    function getQuotedEscapedLiteralText(leftQuote, text, rightQuote) {
-        return leftQuote + escapeNonAsciiCharacters(escapeString(text)) + rightQuote;
+    function getTextOfConstantValue(value) {
+        return typeof value === "string" ? '"' + escapeNonAsciiString(value) + '"' : "" + value;
     }
+    ts.getTextOfConstantValue = getTextOfConstantValue;
     // Add an extra underscore to identifiers that start with two underscores to avoid issues with magic names like '__proto__'
     function escapeIdentifier(identifier) {
         return identifier.length >= 2 && identifier.charCodeAt(0) === 95 /* _ */ && identifier.charCodeAt(1) === 95 /* _ */ ? "_" + identifier : identifier;
     }
     ts.escapeIdentifier = escapeIdentifier;
-    // Remove extra underscore from escaped identifier
-    function unescapeIdentifier(identifier) {
-        return identifier.length >= 3 && identifier.charCodeAt(0) === 95 /* _ */ && identifier.charCodeAt(1) === 95 /* _ */ && identifier.charCodeAt(2) === 95 /* _ */ ? identifier.substr(1) : identifier;
-    }
-    ts.unescapeIdentifier = unescapeIdentifier;
     // Make an identifier from an external module name by extracting the string after the last "/" and replacing
     // all non-alphanumeric characters with underscores
     function makeIdentifierFromModuleName(moduleName) {
@@ -3876,26 +4382,32 @@ var ts;
     ts.makeIdentifierFromModuleName = makeIdentifierFromModuleName;
     function isBlockOrCatchScoped(declaration) {
         return (ts.getCombinedNodeFlags(declaration) & 3 /* BlockScoped */) !== 0 ||
-            isCatchClauseVariableDeclaration(declaration);
+            isCatchClauseVariableDeclarationOrBindingElement(declaration);
     }
     ts.isBlockOrCatchScoped = isBlockOrCatchScoped;
+    function isCatchClauseVariableDeclarationOrBindingElement(declaration) {
+        var node = getRootDeclaration(declaration);
+        return node.kind === 226 /* VariableDeclaration */ && node.parent.kind === 260 /* CatchClause */;
+    }
+    ts.isCatchClauseVariableDeclarationOrBindingElement = isCatchClauseVariableDeclarationOrBindingElement;
     function isAmbientModule(node) {
-        return node && node.kind === 225 /* ModuleDeclaration */ &&
+        return node && node.kind === 233 /* ModuleDeclaration */ &&
             (node.name.kind === 9 /* StringLiteral */ || isGlobalScopeAugmentation(node));
     }
     ts.isAmbientModule = isAmbientModule;
+    /** Given a symbol for a module, checks that it is a shorthand ambient module. */
     function isShorthandAmbientModuleSymbol(moduleSymbol) {
         return isShorthandAmbientModule(moduleSymbol.valueDeclaration);
     }
     ts.isShorthandAmbientModuleSymbol = isShorthandAmbientModuleSymbol;
     function isShorthandAmbientModule(node) {
         // The only kind of module that can be missing a body is a shorthand ambient module.
-        return node.kind === 225 /* ModuleDeclaration */ && (!node.body);
+        return node && node.kind === 233 /* ModuleDeclaration */ && (!node.body);
     }
     function isBlockScopedContainerTopLevel(node) {
-        return node.kind === 256 /* SourceFile */ ||
-            node.kind === 225 /* ModuleDeclaration */ ||
-            isFunctionLike(node);
+        return node.kind === 265 /* SourceFile */ ||
+            node.kind === 233 /* ModuleDeclaration */ ||
+            ts.isFunctionLike(node);
     }
     ts.isBlockScopedContainerTopLevel = isBlockScopedContainerTopLevel;
     function isGlobalScopeAugmentation(module) {
@@ -3910,35 +4422,39 @@ var ts;
             return false;
         }
         switch (node.parent.kind) {
-            case 256 /* SourceFile */:
+            case 265 /* SourceFile */:
                 return ts.isExternalModule(node.parent);
-            case 226 /* ModuleBlock */:
+            case 234 /* ModuleBlock */:
                 return isAmbientModule(node.parent.parent) && !ts.isExternalModule(node.parent.parent.parent);
         }
         return false;
     }
     ts.isExternalModuleAugmentation = isExternalModuleAugmentation;
+    function isEffectiveExternalModule(node, compilerOptions) {
+        return ts.isExternalModule(node) || compilerOptions.isolatedModules;
+    }
+    ts.isEffectiveExternalModule = isEffectiveExternalModule;
     function isBlockScope(node, parentNode) {
         switch (node.kind) {
-            case 256 /* SourceFile */:
-            case 227 /* CaseBlock */:
-            case 252 /* CatchClause */:
-            case 225 /* ModuleDeclaration */:
-            case 206 /* ForStatement */:
-            case 207 /* ForInStatement */:
-            case 208 /* ForOfStatement */:
-            case 148 /* Constructor */:
-            case 147 /* MethodDeclaration */:
-            case 149 /* GetAccessor */:
-            case 150 /* SetAccessor */:
-            case 220 /* FunctionDeclaration */:
-            case 179 /* FunctionExpression */:
-            case 180 /* ArrowFunction */:
+            case 265 /* SourceFile */:
+            case 235 /* CaseBlock */:
+            case 260 /* CatchClause */:
+            case 233 /* ModuleDeclaration */:
+            case 214 /* ForStatement */:
+            case 215 /* ForInStatement */:
+            case 216 /* ForOfStatement */:
+            case 152 /* Constructor */:
+            case 151 /* MethodDeclaration */:
+            case 153 /* GetAccessor */:
+            case 154 /* SetAccessor */:
+            case 228 /* FunctionDeclaration */:
+            case 186 /* FunctionExpression */:
+            case 187 /* ArrowFunction */:
                 return true;
-            case 199 /* Block */:
+            case 207 /* Block */:
                 // function block is not considered block-scope container
                 // see comment in binder.ts: bind(...), case for SyntaxKind.Block
-                return parentNode && !isFunctionLike(parentNode);
+                return parentNode && !ts.isFunctionLike(parentNode);
         }
         return false;
     }
@@ -3955,13 +4471,6 @@ var ts;
         }
     }
     ts.getEnclosingBlockScopeContainer = getEnclosingBlockScopeContainer;
-    function isCatchClauseVariableDeclaration(declaration) {
-        return declaration &&
-            declaration.kind === 218 /* VariableDeclaration */ &&
-            declaration.parent &&
-            declaration.parent.kind === 252 /* CatchClause */;
-    }
-    ts.isCatchClauseVariableDeclaration = isCatchClauseVariableDeclaration;
     // Return display name of an identifier
     // Computed property names will just be emitted as "[<expr>]", where <expr> is the source
     // text of the expression in the computed property.
@@ -3969,12 +4478,46 @@ var ts;
         return getFullWidth(name) === 0 ? "(Missing)" : getTextOfNode(name);
     }
     ts.declarationNameToString = declarationNameToString;
+    function getNameFromIndexInfo(info) {
+        return info.declaration ? declarationNameToString(info.declaration.parameters[0].name) : undefined;
+    }
+    ts.getNameFromIndexInfo = getNameFromIndexInfo;
+    function getTextOfPropertyName(name) {
+        switch (name.kind) {
+            case 71 /* Identifier */:
+                return name.text;
+            case 9 /* StringLiteral */:
+            case 8 /* NumericLiteral */:
+                return name.text;
+            case 144 /* ComputedPropertyName */:
+                if (isStringOrNumericLiteral(name.expression)) {
+                    return name.expression.text;
+                }
+        }
+        return undefined;
+    }
+    ts.getTextOfPropertyName = getTextOfPropertyName;
+    function entityNameToString(name) {
+        switch (name.kind) {
+            case 71 /* Identifier */:
+                return getFullWidth(name) === 0 ? ts.unescapeIdentifier(name.text) : getTextOfNode(name);
+            case 143 /* QualifiedName */:
+                return entityNameToString(name.left) + "." + entityNameToString(name.right);
+            case 179 /* PropertyAccessExpression */:
+                return entityNameToString(name.expression) + "." + entityNameToString(name.name);
+        }
+    }
+    ts.entityNameToString = entityNameToString;
     function createDiagnosticForNode(node, message, arg0, arg1, arg2) {
         var sourceFile = getSourceFileOfNode(node);
+        return createDiagnosticForNodeInSourceFile(sourceFile, node, message, arg0, arg1, arg2);
+    }
+    ts.createDiagnosticForNode = createDiagnosticForNode;
+    function createDiagnosticForNodeInSourceFile(sourceFile, node, message, arg0, arg1, arg2) {
         var span = getErrorSpanForNode(sourceFile, node);
         return ts.createFileDiagnostic(sourceFile, span.start, span.length, message, arg0, arg1, arg2);
     }
-    ts.createDiagnosticForNode = createDiagnosticForNode;
+    ts.createDiagnosticForNodeInSourceFile = createDiagnosticForNodeInSourceFile;
     function createDiagnosticForNodeFromMessageChain(node, messageChain) {
         var sourceFile = getSourceFileOfNode(node);
         var span = getErrorSpanForNode(sourceFile, node);
@@ -3997,7 +4540,7 @@ var ts;
     ts.getSpanOfTokenAtPosition = getSpanOfTokenAtPosition;
     function getErrorSpanForArrowFunction(sourceFile, node) {
         var pos = ts.skipTrivia(sourceFile.text, node.pos);
-        if (node.body && node.body.kind === 199 /* Block */) {
+        if (node.body && node.body.kind === 207 /* Block */) {
             var startLine = ts.getLineAndCharacterOfPosition(sourceFile, node.body.pos).line;
             var endLine = ts.getLineAndCharacterOfPosition(sourceFile, node.body.end).line;
             if (startLine < endLine) {
@@ -4011,7 +4554,7 @@ var ts;
     function getErrorSpanForNode(sourceFile, node) {
         var errorNode = node;
         switch (node.kind) {
-            case 256 /* SourceFile */:
+            case 265 /* SourceFile */:
                 var pos_1 = ts.skipTrivia(sourceFile.text, 0, /*stopAfterLineBreak*/ false);
                 if (pos_1 === sourceFile.text.length) {
                     // file is empty - return span for the beginning of the file
@@ -4020,23 +4563,23 @@ var ts;
                 return getSpanOfTokenAtPosition(sourceFile, pos_1);
             // This list is a work in progress. Add missing node kinds to improve their error
             // spans.
-            case 218 /* VariableDeclaration */:
-            case 169 /* BindingElement */:
-            case 221 /* ClassDeclaration */:
-            case 192 /* ClassExpression */:
-            case 222 /* InterfaceDeclaration */:
-            case 225 /* ModuleDeclaration */:
-            case 224 /* EnumDeclaration */:
-            case 255 /* EnumMember */:
-            case 220 /* FunctionDeclaration */:
-            case 179 /* FunctionExpression */:
-            case 147 /* MethodDeclaration */:
-            case 149 /* GetAccessor */:
-            case 150 /* SetAccessor */:
-            case 223 /* TypeAliasDeclaration */:
+            case 226 /* VariableDeclaration */:
+            case 176 /* BindingElement */:
+            case 229 /* ClassDeclaration */:
+            case 199 /* ClassExpression */:
+            case 230 /* InterfaceDeclaration */:
+            case 233 /* ModuleDeclaration */:
+            case 232 /* EnumDeclaration */:
+            case 264 /* EnumMember */:
+            case 228 /* FunctionDeclaration */:
+            case 186 /* FunctionExpression */:
+            case 151 /* MethodDeclaration */:
+            case 153 /* GetAccessor */:
+            case 154 /* SetAccessor */:
+            case 231 /* TypeAliasDeclaration */:
                 errorNode = node.name;
                 break;
-            case 180 /* ArrowFunction */:
+            case 187 /* ArrowFunction */:
                 return getErrorSpanForArrowFunction(sourceFile, node);
         }
         if (errorNode === undefined) {
@@ -4054,12 +4597,8 @@ var ts;
         return (file.externalModuleIndicator || file.commonJsModuleIndicator) !== undefined;
     }
     ts.isExternalOrCommonJsModule = isExternalOrCommonJsModule;
-    function isDeclarationFile(file) {
-        return file.isDeclarationFile;
-    }
-    ts.isDeclarationFile = isDeclarationFile;
     function isConstEnumDeclaration(node) {
-        return node.kind === 224 /* EnumDeclaration */ && isConst(node);
+        return node.kind === 232 /* EnumDeclaration */ && isConst(node);
     }
     ts.isConstEnumDeclaration = isConstEnumDeclaration;
     function isConst(node) {
@@ -4071,12 +4610,17 @@ var ts;
         return !!(ts.getCombinedNodeFlags(node) & 1 /* Let */);
     }
     ts.isLet = isLet;
-    function isSuperCallExpression(n) {
-        return n.kind === 174 /* CallExpression */ && n.expression.kind === 95 /* SuperKeyword */;
+    function isSuperCall(n) {
+        return n.kind === 181 /* CallExpression */ && n.expression.kind === 97 /* SuperKeyword */;
     }
-    ts.isSuperCallExpression = isSuperCallExpression;
+    ts.isSuperCall = isSuperCall;
+    function isImportCall(n) {
+        return n.kind === 181 /* CallExpression */ && n.expression.kind === 91 /* ImportKeyword */;
+    }
+    ts.isImportCall = isImportCall;
     function isPrologueDirective(node) {
-        return node.kind === 202 /* ExpressionStatement */ && node.expression.kind === 9 /* StringLiteral */;
+        return node.kind === 210 /* ExpressionStatement */
+            && node.expression.kind === 9 /* StringLiteral */;
     }
     ts.isPrologueDirective = isPrologueDirective;
     function getLeadingCommentRangesOfNode(node, sourceFileOfNode) {
@@ -4087,103 +4631,99 @@ var ts;
         return ts.getLeadingCommentRanges(text, node.pos);
     }
     ts.getLeadingCommentRangesOfNodeFromText = getLeadingCommentRangesOfNodeFromText;
-    function getJsDocComments(node, sourceFileOfNode) {
-        return getJsDocCommentsFromText(node, sourceFileOfNode.text);
-    }
-    ts.getJsDocComments = getJsDocComments;
-    function getJsDocCommentsFromText(node, text) {
-        var commentRanges = (node.kind === 142 /* Parameter */ ||
-            node.kind === 141 /* TypeParameter */ ||
-            node.kind === 179 /* FunctionExpression */ ||
-            node.kind === 180 /* ArrowFunction */) ?
+    function getJSDocCommentRanges(node, text) {
+        var commentRanges = (node.kind === 146 /* Parameter */ ||
+            node.kind === 145 /* TypeParameter */ ||
+            node.kind === 186 /* FunctionExpression */ ||
+            node.kind === 187 /* ArrowFunction */) ?
             ts.concatenate(ts.getTrailingCommentRanges(text, node.pos), ts.getLeadingCommentRanges(text, node.pos)) :
             getLeadingCommentRangesOfNodeFromText(node, text);
-        return ts.filter(commentRanges, isJsDocComment);
-        function isJsDocComment(comment) {
-            // True if the comment starts with '/**' but not if it is '/**/'
+        // True if the comment starts with '/**' but not if it is '/**/'
+        return ts.filter(commentRanges, function (comment) {
             return text.charCodeAt(comment.pos + 1) === 42 /* asterisk */ &&
                 text.charCodeAt(comment.pos + 2) === 42 /* asterisk */ &&
                 text.charCodeAt(comment.pos + 3) !== 47 /* slash */;
-        }
+        });
     }
-    ts.getJsDocCommentsFromText = getJsDocCommentsFromText;
+    ts.getJSDocCommentRanges = getJSDocCommentRanges;
     ts.fullTripleSlashReferencePathRegEx = /^(\/\/\/\s*<reference\s+path\s*=\s*)('|")(.+?)\2.*?\/>/;
     ts.fullTripleSlashReferenceTypeReferenceDirectiveRegEx = /^(\/\/\/\s*<reference\s+types\s*=\s*)('|")(.+?)\2.*?\/>/;
     ts.fullTripleSlashAMDReferencePathRegEx = /^(\/\/\/\s*<amd-dependency\s+path\s*=\s*)('|")(.+?)\2.*?\/>/;
     function isPartOfTypeNode(node) {
-        if (154 /* FirstTypeNode */ <= node.kind && node.kind <= 166 /* LastTypeNode */) {
+        if (158 /* FirstTypeNode */ <= node.kind && node.kind <= 173 /* LastTypeNode */) {
             return true;
         }
         switch (node.kind) {
-            case 117 /* AnyKeyword */:
-            case 130 /* NumberKeyword */:
-            case 132 /* StringKeyword */:
-            case 120 /* BooleanKeyword */:
-            case 133 /* SymbolKeyword */:
-            case 135 /* UndefinedKeyword */:
-            case 127 /* NeverKeyword */:
+            case 119 /* AnyKeyword */:
+            case 133 /* NumberKeyword */:
+            case 136 /* StringKeyword */:
+            case 122 /* BooleanKeyword */:
+            case 137 /* SymbolKeyword */:
+            case 139 /* UndefinedKeyword */:
+            case 130 /* NeverKeyword */:
                 return true;
-            case 103 /* VoidKeyword */:
-                return node.parent.kind !== 183 /* VoidExpression */;
-            case 194 /* ExpressionWithTypeArguments */:
+            case 105 /* VoidKeyword */:
+                return node.parent.kind !== 190 /* VoidExpression */;
+            case 201 /* ExpressionWithTypeArguments */:
                 return !isExpressionWithTypeArgumentsInClassExtendsClause(node);
             // Identifiers and qualified names may be type nodes, depending on their context. Climb
             // above them to find the lowest container
-            case 69 /* Identifier */:
+            case 71 /* Identifier */:
                 // If the identifier is the RHS of a qualified name, then it's a type iff its parent is.
-                if (node.parent.kind === 139 /* QualifiedName */ && node.parent.right === node) {
+                if (node.parent.kind === 143 /* QualifiedName */ && node.parent.right === node) {
                     node = node.parent;
                 }
-                else if (node.parent.kind === 172 /* PropertyAccessExpression */ && node.parent.name === node) {
+                else if (node.parent.kind === 179 /* PropertyAccessExpression */ && node.parent.name === node) {
                     node = node.parent;
                 }
                 // At this point, node is either a qualified name or an identifier
-                ts.Debug.assert(node.kind === 69 /* Identifier */ || node.kind === 139 /* QualifiedName */ || node.kind === 172 /* PropertyAccessExpression */, "'node' was expected to be a qualified name, identifier or property access in 'isPartOfTypeNode'.");
-            case 139 /* QualifiedName */:
-            case 172 /* PropertyAccessExpression */:
-            case 97 /* ThisKeyword */:
+                ts.Debug.assert(node.kind === 71 /* Identifier */ || node.kind === 143 /* QualifiedName */ || node.kind === 179 /* PropertyAccessExpression */, "'node' was expected to be a qualified name, identifier or property access in 'isPartOfTypeNode'.");
+            // falls through
+            case 143 /* QualifiedName */:
+            case 179 /* PropertyAccessExpression */:
+            case 99 /* ThisKeyword */:
                 var parent_1 = node.parent;
-                if (parent_1.kind === 158 /* TypeQuery */) {
+                if (parent_1.kind === 162 /* TypeQuery */) {
                     return false;
                 }
                 // Do not recursively call isPartOfTypeNode on the parent. In the example:
                 //
                 //     let a: A.B.C;
                 //
-                // Calling isPartOfTypeNode would consider the qualified name A.B a type node. Only C or
-                // A.B.C is a type node.
-                if (154 /* FirstTypeNode */ <= parent_1.kind && parent_1.kind <= 166 /* LastTypeNode */) {
+                // Calling isPartOfTypeNode would consider the qualified name A.B a type node.
+                // Only C and A.B.C are type nodes.
+                if (158 /* FirstTypeNode */ <= parent_1.kind && parent_1.kind <= 173 /* LastTypeNode */) {
                     return true;
                 }
                 switch (parent_1.kind) {
-                    case 194 /* ExpressionWithTypeArguments */:
+                    case 201 /* ExpressionWithTypeArguments */:
                         return !isExpressionWithTypeArgumentsInClassExtendsClause(parent_1);
-                    case 141 /* TypeParameter */:
+                    case 145 /* TypeParameter */:
                         return node === parent_1.constraint;
-                    case 145 /* PropertyDeclaration */:
-                    case 144 /* PropertySignature */:
-                    case 142 /* Parameter */:
-                    case 218 /* VariableDeclaration */:
+                    case 149 /* PropertyDeclaration */:
+                    case 148 /* PropertySignature */:
+                    case 146 /* Parameter */:
+                    case 226 /* VariableDeclaration */:
                         return node === parent_1.type;
-                    case 220 /* FunctionDeclaration */:
-                    case 179 /* FunctionExpression */:
-                    case 180 /* ArrowFunction */:
-                    case 148 /* Constructor */:
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
+                    case 228 /* FunctionDeclaration */:
+                    case 186 /* FunctionExpression */:
+                    case 187 /* ArrowFunction */:
+                    case 152 /* Constructor */:
+                    case 151 /* MethodDeclaration */:
+                    case 150 /* MethodSignature */:
+                    case 153 /* GetAccessor */:
+                    case 154 /* SetAccessor */:
                         return node === parent_1.type;
-                    case 151 /* CallSignature */:
-                    case 152 /* ConstructSignature */:
-                    case 153 /* IndexSignature */:
+                    case 155 /* CallSignature */:
+                    case 156 /* ConstructSignature */:
+                    case 157 /* IndexSignature */:
                         return node === parent_1.type;
-                    case 177 /* TypeAssertionExpression */:
+                    case 184 /* TypeAssertionExpression */:
                         return node === parent_1.type;
-                    case 174 /* CallExpression */:
-                    case 175 /* NewExpression */:
+                    case 181 /* CallExpression */:
+                    case 182 /* NewExpression */:
                         return parent_1.typeArguments && ts.indexOf(parent_1.typeArguments, node) >= 0;
-                    case 176 /* TaggedTemplateExpression */:
+                    case 183 /* TaggedTemplateExpression */:
                         // TODO (drosen): TaggedTemplateExpressions may eventually support type arguments.
                         return false;
                 }
@@ -4191,29 +4731,39 @@ var ts;
         return false;
     }
     ts.isPartOfTypeNode = isPartOfTypeNode;
+    function isChildOfNodeWithKind(node, kind) {
+        while (node) {
+            if (node.kind === kind) {
+                return true;
+            }
+            node = node.parent;
+        }
+        return false;
+    }
+    ts.isChildOfNodeWithKind = isChildOfNodeWithKind;
     // Warning: This has the same semantics as the forEach family of functions,
     //          in that traversal terminates in the event that 'visitor' supplies a truthy value.
     function forEachReturnStatement(body, visitor) {
         return traverse(body);
         function traverse(node) {
             switch (node.kind) {
-                case 211 /* ReturnStatement */:
+                case 219 /* ReturnStatement */:
                     return visitor(node);
-                case 227 /* CaseBlock */:
-                case 199 /* Block */:
-                case 203 /* IfStatement */:
-                case 204 /* DoStatement */:
-                case 205 /* WhileStatement */:
-                case 206 /* ForStatement */:
-                case 207 /* ForInStatement */:
-                case 208 /* ForOfStatement */:
-                case 212 /* WithStatement */:
-                case 213 /* SwitchStatement */:
-                case 249 /* CaseClause */:
-                case 250 /* DefaultClause */:
-                case 214 /* LabeledStatement */:
-                case 216 /* TryStatement */:
-                case 252 /* CatchClause */:
+                case 235 /* CaseBlock */:
+                case 207 /* Block */:
+                case 211 /* IfStatement */:
+                case 212 /* DoStatement */:
+                case 213 /* WhileStatement */:
+                case 214 /* ForStatement */:
+                case 215 /* ForInStatement */:
+                case 216 /* ForOfStatement */:
+                case 220 /* WithStatement */:
+                case 221 /* SwitchStatement */:
+                case 257 /* CaseClause */:
+                case 258 /* DefaultClause */:
+                case 222 /* LabeledStatement */:
+                case 224 /* TryStatement */:
+                case 260 /* CatchClause */:
                     return ts.forEachChild(node, traverse);
             }
         }
@@ -4223,26 +4773,27 @@ var ts;
         return traverse(body);
         function traverse(node) {
             switch (node.kind) {
-                case 190 /* YieldExpression */:
+                case 197 /* YieldExpression */:
                     visitor(node);
                     var operand = node.expression;
                     if (operand) {
                         traverse(operand);
                     }
-                case 224 /* EnumDeclaration */:
-                case 222 /* InterfaceDeclaration */:
-                case 225 /* ModuleDeclaration */:
-                case 223 /* TypeAliasDeclaration */:
-                case 221 /* ClassDeclaration */:
-                case 192 /* ClassExpression */:
+                    return;
+                case 232 /* EnumDeclaration */:
+                case 230 /* InterfaceDeclaration */:
+                case 233 /* ModuleDeclaration */:
+                case 231 /* TypeAliasDeclaration */:
+                case 229 /* ClassDeclaration */:
+                case 199 /* ClassExpression */:
                     // These are not allowed inside a generator now, but eventually they may be allowed
                     // as local types. Regardless, any yield statements contained within them should be
                     // skipped in this traversal.
                     return;
                 default:
-                    if (isFunctionLike(node)) {
+                    if (ts.isFunctionLike(node)) {
                         var name_4 = node.name;
-                        if (name_4 && name_4.kind === 140 /* ComputedPropertyName */) {
+                        if (name_4 && name_4.kind === 144 /* ComputedPropertyName */) {
                             // Note that we will not include methods/accessors of a class because they would require
                             // first descending into the class. This is by design.
                             traverse(name_4.expression);
@@ -4258,91 +4809,81 @@ var ts;
         }
     }
     ts.forEachYieldExpression = forEachYieldExpression;
+    /**
+     * Gets the most likely element type for a TypeNode. This is not an exhaustive test
+     * as it assumes a rest argument can only be an array type (either T[], or Array<T>).
+     *
+     * @param node The type node.
+     */
+    function getRestParameterElementType(node) {
+        if (node && node.kind === 164 /* ArrayType */) {
+            return node.elementType;
+        }
+        else if (node && node.kind === 159 /* TypeReference */) {
+            return ts.singleOrUndefined(node.typeArguments);
+        }
+        else {
+            return undefined;
+        }
+    }
+    ts.getRestParameterElementType = getRestParameterElementType;
     function isVariableLike(node) {
         if (node) {
             switch (node.kind) {
-                case 169 /* BindingElement */:
-                case 255 /* EnumMember */:
-                case 142 /* Parameter */:
-                case 253 /* PropertyAssignment */:
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
-                case 254 /* ShorthandPropertyAssignment */:
-                case 218 /* VariableDeclaration */:
+                case 176 /* BindingElement */:
+                case 264 /* EnumMember */:
+                case 146 /* Parameter */:
+                case 261 /* PropertyAssignment */:
+                case 149 /* PropertyDeclaration */:
+                case 148 /* PropertySignature */:
+                case 262 /* ShorthandPropertyAssignment */:
+                case 226 /* VariableDeclaration */:
                     return true;
             }
         }
         return false;
     }
     ts.isVariableLike = isVariableLike;
-    function isAccessor(node) {
-        return node && (node.kind === 149 /* GetAccessor */ || node.kind === 150 /* SetAccessor */);
-    }
-    ts.isAccessor = isAccessor;
-    function isClassLike(node) {
-        return node && (node.kind === 221 /* ClassDeclaration */ || node.kind === 192 /* ClassExpression */);
-    }
-    ts.isClassLike = isClassLike;
-    function isFunctionLike(node) {
-        return node && isFunctionLikeKind(node.kind);
-    }
-    ts.isFunctionLike = isFunctionLike;
-    function isFunctionLikeKind(kind) {
-        switch (kind) {
-            case 148 /* Constructor */:
-            case 179 /* FunctionExpression */:
-            case 220 /* FunctionDeclaration */:
-            case 180 /* ArrowFunction */:
-            case 147 /* MethodDeclaration */:
-            case 146 /* MethodSignature */:
-            case 149 /* GetAccessor */:
-            case 150 /* SetAccessor */:
-            case 151 /* CallSignature */:
-            case 152 /* ConstructSignature */:
-            case 153 /* IndexSignature */:
-            case 156 /* FunctionType */:
-            case 157 /* ConstructorType */:
-                return true;
-        }
-        return false;
-    }
-    ts.isFunctionLikeKind = isFunctionLikeKind;
     function introducesArgumentsExoticObject(node) {
         switch (node.kind) {
-            case 147 /* MethodDeclaration */:
-            case 146 /* MethodSignature */:
-            case 148 /* Constructor */:
-            case 149 /* GetAccessor */:
-            case 150 /* SetAccessor */:
-            case 220 /* FunctionDeclaration */:
-            case 179 /* FunctionExpression */:
+            case 151 /* MethodDeclaration */:
+            case 150 /* MethodSignature */:
+            case 152 /* Constructor */:
+            case 153 /* GetAccessor */:
+            case 154 /* SetAccessor */:
+            case 228 /* FunctionDeclaration */:
+            case 186 /* FunctionExpression */:
                 return true;
         }
         return false;
     }
     ts.introducesArgumentsExoticObject = introducesArgumentsExoticObject;
-    function isIterationStatement(node, lookInLabeledStatements) {
-        switch (node.kind) {
-            case 206 /* ForStatement */:
-            case 207 /* ForInStatement */:
-            case 208 /* ForOfStatement */:
-            case 204 /* DoStatement */:
-            case 205 /* WhileStatement */:
-                return true;
-            case 214 /* LabeledStatement */:
-                return lookInLabeledStatements && isIterationStatement(node.statement, lookInLabeledStatements);
+    function unwrapInnermostStatementOfLabel(node, beforeUnwrapLabelCallback) {
+        while (true) {
+            if (beforeUnwrapLabelCallback) {
+                beforeUnwrapLabelCallback(node);
+            }
+            if (node.statement.kind !== 222 /* LabeledStatement */) {
+                return node.statement;
+            }
+            node = node.statement;
         }
-        return false;
     }
-    ts.isIterationStatement = isIterationStatement;
+    ts.unwrapInnermostStatementOfLabel = unwrapInnermostStatementOfLabel;
     function isFunctionBlock(node) {
-        return node && node.kind === 199 /* Block */ && isFunctionLike(node.parent);
+        return node && node.kind === 207 /* Block */ && ts.isFunctionLike(node.parent);
     }
     ts.isFunctionBlock = isFunctionBlock;
     function isObjectLiteralMethod(node) {
-        return node && node.kind === 147 /* MethodDeclaration */ && node.parent.kind === 171 /* ObjectLiteralExpression */;
+        return node && node.kind === 151 /* MethodDeclaration */ && node.parent.kind === 178 /* ObjectLiteralExpression */;
     }
     ts.isObjectLiteralMethod = isObjectLiteralMethod;
+    function isObjectLiteralOrClassExpressionMethod(node) {
+        return node.kind === 151 /* MethodDeclaration */ &&
+            (node.parent.kind === 178 /* ObjectLiteralExpression */ ||
+                node.parent.kind === 199 /* ClassExpression */);
+    }
+    ts.isObjectLiteralOrClassExpressionMethod = isObjectLiteralOrClassExpressionMethod;
     function isIdentifierTypePredicate(predicate) {
         return predicate && predicate.kind === 1 /* Identifier */;
     }
@@ -4351,10 +4892,19 @@ var ts;
         return predicate && predicate.kind === 0 /* This */;
     }
     ts.isThisTypePredicate = isThisTypePredicate;
+    function getPropertyAssignment(objectLiteral, key, key2) {
+        return ts.filter(objectLiteral.properties, function (property) {
+            if (property.kind === 261 /* PropertyAssignment */) {
+                var propName = getTextOfPropertyName(property.name);
+                return key === propName || (key2 && key2 === propName);
+            }
+        });
+    }
+    ts.getPropertyAssignment = getPropertyAssignment;
     function getContainingFunction(node) {
         while (true) {
             node = node.parent;
-            if (!node || isFunctionLike(node)) {
+            if (!node || ts.isFunctionLike(node)) {
                 return node;
             }
         }
@@ -4363,7 +4913,7 @@ var ts;
     function getContainingClass(node) {
         while (true) {
             node = node.parent;
-            if (!node || isClassLike(node)) {
+            if (!node || ts.isClassLike(node)) {
                 return node;
             }
         }
@@ -4376,12 +4926,12 @@ var ts;
                 return undefined;
             }
             switch (node.kind) {
-                case 140 /* ComputedPropertyName */:
+                case 144 /* ComputedPropertyName */:
                     // If the grandparent node is an object literal (as opposed to a class),
                     // then the computed property is not a 'this' container.
                     // A computed property name in a class needs to be a this container
                     // so that we can error on it.
-                    if (isClassLike(node.parent.parent)) {
+                    if (ts.isClassLike(node.parent.parent)) {
                         return node;
                     }
                     // If this is a computed property, then the parent should not
@@ -4391,52 +4941,65 @@ var ts;
                     // the *body* of the container.
                     node = node.parent;
                     break;
-                case 143 /* Decorator */:
+                case 147 /* Decorator */:
                     // Decorators are always applied outside of the body of a class or method.
-                    if (node.parent.kind === 142 /* Parameter */ && isClassElement(node.parent.parent)) {
+                    if (node.parent.kind === 146 /* Parameter */ && ts.isClassElement(node.parent.parent)) {
                         // If the decorator's parent is a Parameter, we resolve the this container from
                         // the grandparent class declaration.
                         node = node.parent.parent;
                     }
-                    else if (isClassElement(node.parent)) {
+                    else if (ts.isClassElement(node.parent)) {
                         // If the decorator's parent is a class element, we resolve the 'this' container
                         // from the parent class declaration.
                         node = node.parent;
                     }
                     break;
-                case 180 /* ArrowFunction */:
+                case 187 /* ArrowFunction */:
                     if (!includeArrowFunctions) {
                         continue;
                     }
-                // Fall through
-                case 220 /* FunctionDeclaration */:
-                case 179 /* FunctionExpression */:
-                case 225 /* ModuleDeclaration */:
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                case 148 /* Constructor */:
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                case 151 /* CallSignature */:
-                case 152 /* ConstructSignature */:
-                case 153 /* IndexSignature */:
-                case 224 /* EnumDeclaration */:
-                case 256 /* SourceFile */:
+                // falls through
+                case 228 /* FunctionDeclaration */:
+                case 186 /* FunctionExpression */:
+                case 233 /* ModuleDeclaration */:
+                case 149 /* PropertyDeclaration */:
+                case 148 /* PropertySignature */:
+                case 151 /* MethodDeclaration */:
+                case 150 /* MethodSignature */:
+                case 152 /* Constructor */:
+                case 153 /* GetAccessor */:
+                case 154 /* SetAccessor */:
+                case 155 /* CallSignature */:
+                case 156 /* ConstructSignature */:
+                case 157 /* IndexSignature */:
+                case 232 /* EnumDeclaration */:
+                case 265 /* SourceFile */:
                     return node;
             }
         }
     }
     ts.getThisContainer = getThisContainer;
+    function getNewTargetContainer(node) {
+        var container = getThisContainer(node, /*includeArrowFunctions*/ false);
+        if (container) {
+            switch (container.kind) {
+                case 152 /* Constructor */:
+                case 228 /* FunctionDeclaration */:
+                case 186 /* FunctionExpression */:
+                    return container;
+            }
+        }
+        return undefined;
+    }
+    ts.getNewTargetContainer = getNewTargetContainer;
     /**
-      * Given an super call/property node, returns the closest node where
-      * - a super call/property access is legal in the node and not legal in the parent node the node.
-      *   i.e. super call is legal in constructor but not legal in the class body.
-      * - the container is an arrow function (so caller might need to call getSuperContainer again in case it needs to climb higher)
-      * - a super call/property is definitely illegal in the container (but might be legal in some subnode)
-      *   i.e. super property access is illegal in function declaration but can be legal in the statement list
-      */
+     * Given an super call/property node, returns the closest node where
+     * - a super call/property access is legal in the node and not legal in the parent node the node.
+     *   i.e. super call is legal in constructor but not legal in the class body.
+     * - the container is an arrow function (so caller might need to call getSuperContainer again in case it needs to climb higher)
+     * - a super call/property is definitely illegal in the container (but might be legal in some subnode)
+     *   i.e. super property access is illegal in function declaration but can be legal in the statement list
+     */
     function getSuperContainer(node, stopOnFunctions) {
         while (true) {
             node = node.parent;
@@ -4444,31 +5007,32 @@ var ts;
                 return node;
             }
             switch (node.kind) {
-                case 140 /* ComputedPropertyName */:
+                case 144 /* ComputedPropertyName */:
                     node = node.parent;
                     break;
-                case 220 /* FunctionDeclaration */:
-                case 179 /* FunctionExpression */:
-                case 180 /* ArrowFunction */:
+                case 228 /* FunctionDeclaration */:
+                case 186 /* FunctionExpression */:
+                case 187 /* ArrowFunction */:
                     if (!stopOnFunctions) {
                         continue;
                     }
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                case 148 /* Constructor */:
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
+                // falls through
+                case 149 /* PropertyDeclaration */:
+                case 148 /* PropertySignature */:
+                case 151 /* MethodDeclaration */:
+                case 150 /* MethodSignature */:
+                case 152 /* Constructor */:
+                case 153 /* GetAccessor */:
+                case 154 /* SetAccessor */:
                     return node;
-                case 143 /* Decorator */:
+                case 147 /* Decorator */:
                     // Decorators are always applied outside of the body of a class or method.
-                    if (node.parent.kind === 142 /* Parameter */ && isClassElement(node.parent.parent)) {
+                    if (node.parent.kind === 146 /* Parameter */ && ts.isClassElement(node.parent.parent)) {
                         // If the decorator's parent is a Parameter, we resolve the this container from
                         // the grandparent class declaration.
                         node = node.parent.parent;
                     }
-                    else if (isClassElement(node.parent)) {
+                    else if (ts.isClassElement(node.parent)) {
                         // If the decorator's parent is a class element, we resolve the 'this' container
                         // from the parent class declaration.
                         node = node.parent;
@@ -4479,14 +5043,14 @@ var ts;
     }
     ts.getSuperContainer = getSuperContainer;
     function getImmediatelyInvokedFunctionExpression(func) {
-        if (func.kind === 179 /* FunctionExpression */ || func.kind === 180 /* ArrowFunction */) {
+        if (func.kind === 186 /* FunctionExpression */ || func.kind === 187 /* ArrowFunction */) {
             var prev = func;
             var parent_2 = func.parent;
-            while (parent_2.kind === 178 /* ParenthesizedExpression */) {
+            while (parent_2.kind === 185 /* ParenthesizedExpression */) {
                 prev = parent_2;
                 parent_2 = parent_2.parent;
             }
-            if (parent_2.kind === 174 /* CallExpression */ && parent_2.expression === prev) {
+            if (parent_2.kind === 181 /* CallExpression */ && parent_2.expression === prev) {
                 return parent_2;
             }
         }
@@ -4497,67 +5061,58 @@ var ts;
      */
     function isSuperProperty(node) {
         var kind = node.kind;
-        return (kind === 172 /* PropertyAccessExpression */ || kind === 173 /* ElementAccessExpression */)
-            && node.expression.kind === 95 /* SuperKeyword */;
+        return (kind === 179 /* PropertyAccessExpression */ || kind === 180 /* ElementAccessExpression */)
+            && node.expression.kind === 97 /* SuperKeyword */;
     }
     ts.isSuperProperty = isSuperProperty;
     function getEntityNameFromTypeNode(node) {
-        if (node) {
-            switch (node.kind) {
-                case 155 /* TypeReference */:
-                    return node.typeName;
-                case 194 /* ExpressionWithTypeArguments */:
-                    ts.Debug.assert(isEntityNameExpression(node.expression));
-                    return node.expression;
-                case 69 /* Identifier */:
-                case 139 /* QualifiedName */:
-                    return node;
-            }
+        switch (node.kind) {
+            case 159 /* TypeReference */:
+            case 277 /* JSDocTypeReference */:
+                return node.typeName;
+            case 201 /* ExpressionWithTypeArguments */:
+                return isEntityNameExpression(node.expression)
+                    ? node.expression
+                    : undefined;
+            case 71 /* Identifier */:
+            case 143 /* QualifiedName */:
+                return node;
         }
         return undefined;
     }
     ts.getEntityNameFromTypeNode = getEntityNameFromTypeNode;
-    function isCallLikeExpression(node) {
-        switch (node.kind) {
-            case 174 /* CallExpression */:
-            case 175 /* NewExpression */:
-            case 176 /* TaggedTemplateExpression */:
-            case 143 /* Decorator */:
-                return true;
-            default:
-                return false;
-        }
-    }
-    ts.isCallLikeExpression = isCallLikeExpression;
     function getInvokedExpression(node) {
-        if (node.kind === 176 /* TaggedTemplateExpression */) {
+        if (node.kind === 183 /* TaggedTemplateExpression */) {
             return node.tag;
         }
+        else if (ts.isJsxOpeningLikeElement(node)) {
+            return node.tagName;
+        }
         // Will either be a CallExpression, NewExpression, or Decorator.
         return node.expression;
     }
     ts.getInvokedExpression = getInvokedExpression;
     function nodeCanBeDecorated(node) {
         switch (node.kind) {
-            case 221 /* ClassDeclaration */:
+            case 229 /* ClassDeclaration */:
                 // classes are valid targets
                 return true;
-            case 145 /* PropertyDeclaration */:
+            case 149 /* PropertyDeclaration */:
                 // property declarations are valid if their parent is a class declaration.
-                return node.parent.kind === 221 /* ClassDeclaration */;
-            case 149 /* GetAccessor */:
-            case 150 /* SetAccessor */:
-            case 147 /* MethodDeclaration */:
+                return node.parent.kind === 229 /* ClassDeclaration */;
+            case 153 /* GetAccessor */:
+            case 154 /* SetAccessor */:
+            case 151 /* MethodDeclaration */:
                 // if this method has a body and its parent is a class declaration, this is a valid target.
                 return node.body !== undefined
-                    && node.parent.kind === 221 /* ClassDeclaration */;
-            case 142 /* Parameter */:
+                    && node.parent.kind === 229 /* ClassDeclaration */;
+            case 146 /* Parameter */:
                 // if the parameter's parent has a body and its grandparent is a class declaration, this is a valid target;
                 return node.parent.body !== undefined
-                    && (node.parent.kind === 148 /* Constructor */
-                        || node.parent.kind === 147 /* MethodDeclaration */
-                        || node.parent.kind === 150 /* SetAccessor */)
-                    && node.parent.parent.kind === 221 /* ClassDeclaration */;
+                    && (node.parent.kind === 152 /* Constructor */
+                        || node.parent.kind === 151 /* MethodDeclaration */
+                        || node.parent.kind === 154 /* SetAccessor */)
+                    && node.parent.parent.kind === 229 /* ClassDeclaration */;
         }
         return false;
     }
@@ -4573,19 +5128,19 @@ var ts;
     ts.nodeOrChildIsDecorated = nodeOrChildIsDecorated;
     function childIsDecorated(node) {
         switch (node.kind) {
-            case 221 /* ClassDeclaration */:
+            case 229 /* ClassDeclaration */:
                 return ts.forEach(node.members, nodeOrChildIsDecorated);
-            case 147 /* MethodDeclaration */:
-            case 150 /* SetAccessor */:
+            case 151 /* MethodDeclaration */:
+            case 154 /* SetAccessor */:
                 return ts.forEach(node.parameters, nodeIsDecorated);
         }
     }
     ts.childIsDecorated = childIsDecorated;
     function isJSXTagName(node) {
         var parent = node.parent;
-        if (parent.kind === 243 /* JsxOpeningElement */ ||
-            parent.kind === 242 /* JsxSelfClosingElement */ ||
-            parent.kind === 245 /* JsxClosingElement */) {
+        if (parent.kind === 251 /* JsxOpeningElement */ ||
+            parent.kind === 250 /* JsxSelfClosingElement */ ||
+            parent.kind === 252 /* JsxClosingElement */) {
             return parent.tagName === node;
         }
         return false;
@@ -4593,98 +5148,100 @@ var ts;
     ts.isJSXTagName = isJSXTagName;
     function isPartOfExpression(node) {
         switch (node.kind) {
-            case 97 /* ThisKeyword */:
-            case 95 /* SuperKeyword */:
-            case 93 /* NullKeyword */:
-            case 99 /* TrueKeyword */:
-            case 84 /* FalseKeyword */:
-            case 10 /* RegularExpressionLiteral */:
-            case 170 /* ArrayLiteralExpression */:
-            case 171 /* ObjectLiteralExpression */:
-            case 172 /* PropertyAccessExpression */:
-            case 173 /* ElementAccessExpression */:
-            case 174 /* CallExpression */:
-            case 175 /* NewExpression */:
-            case 176 /* TaggedTemplateExpression */:
-            case 195 /* AsExpression */:
-            case 177 /* TypeAssertionExpression */:
-            case 196 /* NonNullExpression */:
-            case 178 /* ParenthesizedExpression */:
-            case 179 /* FunctionExpression */:
-            case 192 /* ClassExpression */:
-            case 180 /* ArrowFunction */:
-            case 183 /* VoidExpression */:
-            case 181 /* DeleteExpression */:
-            case 182 /* TypeOfExpression */:
-            case 185 /* PrefixUnaryExpression */:
-            case 186 /* PostfixUnaryExpression */:
-            case 187 /* BinaryExpression */:
-            case 188 /* ConditionalExpression */:
-            case 191 /* SpreadElementExpression */:
-            case 189 /* TemplateExpression */:
-            case 11 /* NoSubstitutionTemplateLiteral */:
-            case 193 /* OmittedExpression */:
-            case 241 /* JsxElement */:
-            case 242 /* JsxSelfClosingElement */:
-            case 190 /* YieldExpression */:
-            case 184 /* AwaitExpression */:
+            case 99 /* ThisKeyword */:
+            case 97 /* SuperKeyword */:
+            case 95 /* NullKeyword */:
+            case 101 /* TrueKeyword */:
+            case 86 /* FalseKeyword */:
+            case 12 /* RegularExpressionLiteral */:
+            case 177 /* ArrayLiteralExpression */:
+            case 178 /* ObjectLiteralExpression */:
+            case 179 /* PropertyAccessExpression */:
+            case 180 /* ElementAccessExpression */:
+            case 181 /* CallExpression */:
+            case 182 /* NewExpression */:
+            case 183 /* TaggedTemplateExpression */:
+            case 202 /* AsExpression */:
+            case 184 /* TypeAssertionExpression */:
+            case 203 /* NonNullExpression */:
+            case 185 /* ParenthesizedExpression */:
+            case 186 /* FunctionExpression */:
+            case 199 /* ClassExpression */:
+            case 187 /* ArrowFunction */:
+            case 190 /* VoidExpression */:
+            case 188 /* DeleteExpression */:
+            case 189 /* TypeOfExpression */:
+            case 192 /* PrefixUnaryExpression */:
+            case 193 /* PostfixUnaryExpression */:
+            case 194 /* BinaryExpression */:
+            case 195 /* ConditionalExpression */:
+            case 198 /* SpreadElement */:
+            case 196 /* TemplateExpression */:
+            case 13 /* NoSubstitutionTemplateLiteral */:
+            case 200 /* OmittedExpression */:
+            case 249 /* JsxElement */:
+            case 250 /* JsxSelfClosingElement */:
+            case 197 /* YieldExpression */:
+            case 191 /* AwaitExpression */:
+            case 204 /* MetaProperty */:
                 return true;
-            case 139 /* QualifiedName */:
-                while (node.parent.kind === 139 /* QualifiedName */) {
+            case 143 /* QualifiedName */:
+                while (node.parent.kind === 143 /* QualifiedName */) {
                     node = node.parent;
                 }
-                return node.parent.kind === 158 /* TypeQuery */ || isJSXTagName(node);
-            case 69 /* Identifier */:
-                if (node.parent.kind === 158 /* TypeQuery */ || isJSXTagName(node)) {
+                return node.parent.kind === 162 /* TypeQuery */ || isJSXTagName(node);
+            case 71 /* Identifier */:
+                if (node.parent.kind === 162 /* TypeQuery */ || isJSXTagName(node)) {
                     return true;
                 }
-            // fall through
+            // falls through
             case 8 /* NumericLiteral */:
             case 9 /* StringLiteral */:
-            case 97 /* ThisKeyword */:
+            case 99 /* ThisKeyword */:
                 var parent_3 = node.parent;
                 switch (parent_3.kind) {
-                    case 218 /* VariableDeclaration */:
-                    case 142 /* Parameter */:
-                    case 145 /* PropertyDeclaration */:
-                    case 144 /* PropertySignature */:
-                    case 255 /* EnumMember */:
-                    case 253 /* PropertyAssignment */:
-                    case 169 /* BindingElement */:
+                    case 226 /* VariableDeclaration */:
+                    case 146 /* Parameter */:
+                    case 149 /* PropertyDeclaration */:
+                    case 148 /* PropertySignature */:
+                    case 264 /* EnumMember */:
+                    case 261 /* PropertyAssignment */:
+                    case 176 /* BindingElement */:
                         return parent_3.initializer === node;
-                    case 202 /* ExpressionStatement */:
-                    case 203 /* IfStatement */:
-                    case 204 /* DoStatement */:
-                    case 205 /* WhileStatement */:
-                    case 211 /* ReturnStatement */:
-                    case 212 /* WithStatement */:
-                    case 213 /* SwitchStatement */:
-                    case 249 /* CaseClause */:
-                    case 215 /* ThrowStatement */:
-                    case 213 /* SwitchStatement */:
+                    case 210 /* ExpressionStatement */:
+                    case 211 /* IfStatement */:
+                    case 212 /* DoStatement */:
+                    case 213 /* WhileStatement */:
+                    case 219 /* ReturnStatement */:
+                    case 220 /* WithStatement */:
+                    case 221 /* SwitchStatement */:
+                    case 257 /* CaseClause */:
+                    case 223 /* ThrowStatement */:
+                    case 221 /* SwitchStatement */:
                         return parent_3.expression === node;
-                    case 206 /* ForStatement */:
+                    case 214 /* ForStatement */:
                         var forStatement = parent_3;
-                        return (forStatement.initializer === node && forStatement.initializer.kind !== 219 /* VariableDeclarationList */) ||
+                        return (forStatement.initializer === node && forStatement.initializer.kind !== 227 /* VariableDeclarationList */) ||
                             forStatement.condition === node ||
                             forStatement.incrementor === node;
-                    case 207 /* ForInStatement */:
-                    case 208 /* ForOfStatement */:
+                    case 215 /* ForInStatement */:
+                    case 216 /* ForOfStatement */:
                         var forInStatement = parent_3;
-                        return (forInStatement.initializer === node && forInStatement.initializer.kind !== 219 /* VariableDeclarationList */) ||
+                        return (forInStatement.initializer === node && forInStatement.initializer.kind !== 227 /* VariableDeclarationList */) ||
                             forInStatement.expression === node;
-                    case 177 /* TypeAssertionExpression */:
-                    case 195 /* AsExpression */:
+                    case 184 /* TypeAssertionExpression */:
+                    case 202 /* AsExpression */:
                         return node === parent_3.expression;
-                    case 197 /* TemplateSpan */:
+                    case 205 /* TemplateSpan */:
                         return node === parent_3.expression;
-                    case 140 /* ComputedPropertyName */:
+                    case 144 /* ComputedPropertyName */:
                         return node === parent_3.expression;
-                    case 143 /* Decorator */:
-                    case 248 /* JsxExpression */:
-                    case 247 /* JsxSpreadAttribute */:
+                    case 147 /* Decorator */:
+                    case 256 /* JsxExpression */:
+                    case 255 /* JsxSpreadAttribute */:
+                    case 263 /* SpreadAssignment */:
                         return true;
-                    case 194 /* ExpressionWithTypeArguments */:
+                    case 201 /* ExpressionWithTypeArguments */:
                         return parent_3.expression === node && isExpressionWithTypeArgumentsInClassExtendsClause(parent_3);
                     default:
                         if (isPartOfExpression(parent_3)) {
@@ -4695,14 +5252,8 @@ var ts;
         return false;
     }
     ts.isPartOfExpression = isPartOfExpression;
-    function isInstantiatedModule(node, preserveConstEnums) {
-        var moduleState = ts.getModuleInstanceState(node);
-        return moduleState === 1 /* Instantiated */ ||
-            (preserveConstEnums && moduleState === 2 /* ConstEnumOnly */);
-    }
-    ts.isInstantiatedModule = isInstantiatedModule;
     function isExternalModuleImportEqualsDeclaration(node) {
-        return node.kind === 229 /* ImportEqualsDeclaration */ && node.moduleReference.kind === 240 /* ExternalModuleReference */;
+        return node.kind === 237 /* ImportEqualsDeclaration */ && node.moduleReference.kind === 248 /* ExternalModuleReference */;
     }
     ts.isExternalModuleImportEqualsDeclaration = isExternalModuleImportEqualsDeclaration;
     function getExternalModuleImportEqualsDeclarationExpression(node) {
@@ -4711,7 +5262,7 @@ var ts;
     }
     ts.getExternalModuleImportEqualsDeclarationExpression = getExternalModuleImportEqualsDeclarationExpression;
     function isInternalModuleImportEqualsDeclaration(node) {
-        return node.kind === 229 /* ImportEqualsDeclaration */ && node.moduleReference.kind !== 240 /* ExternalModuleReference */;
+        return node.kind === 237 /* ImportEqualsDeclaration */ && node.moduleReference.kind !== 248 /* ExternalModuleReference */;
     }
     ts.isInternalModuleImportEqualsDeclaration = isInternalModuleImportEqualsDeclaration;
     function isSourceFileJavaScript(file) {
@@ -4719,21 +5270,27 @@ var ts;
     }
     ts.isSourceFileJavaScript = isSourceFileJavaScript;
     function isInJavaScriptFile(node) {
-        return node && !!(node.flags & 1048576 /* JavaScriptFile */);
+        return node && !!(node.flags & 65536 /* JavaScriptFile */);
     }
     ts.isInJavaScriptFile = isInJavaScriptFile;
     /**
      * Returns true if the node is a CallExpression to the identifier 'require' with
-     * exactly one argument.
+     * exactly one argument (of the form 'require("name")').
      * This function does not test if the node is in a JavaScript file or not.
-    */
-    function isRequireCall(expression, checkArgumentIsStringLiteral) {
-        // of the form 'require("name")'
-        var isRequire = expression.kind === 174 /* CallExpression */ &&
-            expression.expression.kind === 69 /* Identifier */ &&
-            expression.expression.text === "require" &&
-            expression.arguments.length === 1;
-        return isRequire && (!checkArgumentIsStringLiteral || expression.arguments[0].kind === 9 /* StringLiteral */);
+     */
+    function isRequireCall(callExpression, checkArgumentIsStringLiteral) {
+        if (callExpression.kind !== 181 /* CallExpression */) {
+            return false;
+        }
+        var _a = callExpression, expression = _a.expression, args = _a.arguments;
+        if (expression.kind !== 71 /* Identifier */ || expression.text !== "require") {
+            return false;
+        }
+        if (args.length !== 1) {
+            return false;
+        }
+        var arg = args[0];
+        return !checkArgumentIsStringLiteral || arg.kind === 9 /* StringLiteral */ || arg.kind === 13 /* NoSubstitutionTemplateLiteral */;
     }
     ts.isRequireCall = isRequireCall;
     function isSingleOrDoubleQuote(charCode) {
@@ -4744,29 +5301,41 @@ var ts;
      * Returns true if the node is a variable declaration whose initializer is a function expression.
      * This function does not test if the node is in a JavaScript file or not.
      */
-    function isDeclarationOfFunctionExpression(s) {
-        if (s.valueDeclaration && s.valueDeclaration.kind === 218 /* VariableDeclaration */) {
+    function isDeclarationOfFunctionOrClassExpression(s) {
+        if (s.valueDeclaration && s.valueDeclaration.kind === 226 /* VariableDeclaration */) {
             var declaration = s.valueDeclaration;
-            return declaration.initializer && declaration.initializer.kind === 179 /* FunctionExpression */;
+            return declaration.initializer && (declaration.initializer.kind === 186 /* FunctionExpression */ || declaration.initializer.kind === 199 /* ClassExpression */);
         }
         return false;
     }
-    ts.isDeclarationOfFunctionExpression = isDeclarationOfFunctionExpression;
+    ts.isDeclarationOfFunctionOrClassExpression = isDeclarationOfFunctionOrClassExpression;
+    function getRightMostAssignedExpression(node) {
+        while (isAssignmentExpression(node, /*excludeCompoundAssignements*/ true)) {
+            node = node.right;
+        }
+        return node;
+    }
+    ts.getRightMostAssignedExpression = getRightMostAssignedExpression;
+    function isExportsIdentifier(node) {
+        return ts.isIdentifier(node) && node.text === "exports";
+    }
+    ts.isExportsIdentifier = isExportsIdentifier;
+    function isModuleExportsPropertyAccessExpression(node) {
+        return ts.isPropertyAccessExpression(node) && ts.isIdentifier(node.expression) && node.expression.text === "module" && node.name.text === "exports";
+    }
+    ts.isModuleExportsPropertyAccessExpression = isModuleExportsPropertyAccessExpression;
     /// Given a BinaryExpression, returns SpecialPropertyAssignmentKind for the various kinds of property
     /// assignments we treat as special in the binder
     function getSpecialPropertyAssignmentKind(expression) {
         if (!isInJavaScriptFile(expression)) {
             return 0 /* None */;
         }
-        if (expression.kind !== 187 /* BinaryExpression */) {
-            return 0 /* None */;
-        }
         var expr = expression;
-        if (expr.operatorToken.kind !== 56 /* EqualsToken */ || expr.left.kind !== 172 /* PropertyAccessExpression */) {
+        if (expr.operatorToken.kind !== 58 /* EqualsToken */ || expr.left.kind !== 179 /* PropertyAccessExpression */) {
             return 0 /* None */;
         }
         var lhs = expr.left;
-        if (lhs.expression.kind === 69 /* Identifier */) {
+        if (lhs.expression.kind === 71 /* Identifier */) {
             var lhsId = lhs.expression;
             if (lhsId.text === "exports") {
                 // exports.name = expr
@@ -4776,14 +5345,18 @@ var ts;
                 // module.exports = expr
                 return 2 /* ModuleExports */;
             }
+            else {
+                // F.x = expr
+                return 5 /* Property */;
+            }
         }
-        else if (lhs.expression.kind === 97 /* ThisKeyword */) {
+        else if (lhs.expression.kind === 99 /* ThisKeyword */) {
             return 4 /* ThisProperty */;
         }
-        else if (lhs.expression.kind === 172 /* PropertyAccessExpression */) {
+        else if (lhs.expression.kind === 179 /* PropertyAccessExpression */) {
             // chained dot, e.g. x.y.z = expr; this var is the 'x.y' part
             var innerPropertyAccess = lhs.expression;
-            if (innerPropertyAccess.expression.kind === 69 /* Identifier */) {
+            if (innerPropertyAccess.expression.kind === 71 /* Identifier */) {
                 // module.exports.name = expr
                 var innerPropertyAccessIdentifier = innerPropertyAccess.expression;
                 if (innerPropertyAccessIdentifier.text === "module" && innerPropertyAccess.name.text === "exports") {
@@ -4798,35 +5371,35 @@ var ts;
     }
     ts.getSpecialPropertyAssignmentKind = getSpecialPropertyAssignmentKind;
     function getExternalModuleName(node) {
-        if (node.kind === 230 /* ImportDeclaration */) {
+        if (node.kind === 238 /* ImportDeclaration */) {
             return node.moduleSpecifier;
         }
-        if (node.kind === 229 /* ImportEqualsDeclaration */) {
+        if (node.kind === 237 /* ImportEqualsDeclaration */) {
             var reference = node.moduleReference;
-            if (reference.kind === 240 /* ExternalModuleReference */) {
+            if (reference.kind === 248 /* ExternalModuleReference */) {
                 return reference.expression;
             }
         }
-        if (node.kind === 236 /* ExportDeclaration */) {
+        if (node.kind === 244 /* ExportDeclaration */) {
             return node.moduleSpecifier;
         }
-        if (node.kind === 225 /* ModuleDeclaration */ && node.name.kind === 9 /* StringLiteral */) {
+        if (node.kind === 233 /* ModuleDeclaration */ && node.name.kind === 9 /* StringLiteral */) {
             return node.name;
         }
     }
     ts.getExternalModuleName = getExternalModuleName;
     function getNamespaceDeclarationNode(node) {
-        if (node.kind === 229 /* ImportEqualsDeclaration */) {
+        if (node.kind === 237 /* ImportEqualsDeclaration */) {
             return node;
         }
         var importClause = node.importClause;
-        if (importClause && importClause.namedBindings && importClause.namedBindings.kind === 232 /* NamespaceImport */) {
+        if (importClause && importClause.namedBindings && importClause.namedBindings.kind === 240 /* NamespaceImport */) {
             return importClause.namedBindings;
         }
     }
     ts.getNamespaceDeclarationNode = getNamespaceDeclarationNode;
     function isDefaultImport(node) {
-        return node.kind === 230 /* ImportDeclaration */
+        return node.kind === 238 /* ImportDeclaration */
             && node.importClause
             && !!node.importClause.name;
     }
@@ -4834,13 +5407,13 @@ var ts;
     function hasQuestionToken(node) {
         if (node) {
             switch (node.kind) {
-                case 142 /* Parameter */:
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                case 254 /* ShorthandPropertyAssignment */:
-                case 253 /* PropertyAssignment */:
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
+                case 146 /* Parameter */:
+                case 151 /* MethodDeclaration */:
+                case 150 /* MethodSignature */:
+                case 262 /* ShorthandPropertyAssignment */:
+                case 261 /* PropertyAssignment */:
+                case 149 /* PropertyDeclaration */:
+                case 148 /* PropertySignature */:
                     return node.questionToken !== undefined;
             }
         }
@@ -4848,132 +5421,98 @@ var ts;
     }
     ts.hasQuestionToken = hasQuestionToken;
     function isJSDocConstructSignature(node) {
-        return node.kind === 269 /* JSDocFunctionType */ &&
+        return node.kind === 279 /* JSDocFunctionType */ &&
             node.parameters.length > 0 &&
-            node.parameters[0].type.kind === 271 /* JSDocConstructorType */;
+            node.parameters[0].type.kind === 281 /* JSDocConstructorType */;
     }
     ts.isJSDocConstructSignature = isJSDocConstructSignature;
-    function getJSDocTag(node, kind, checkParentVariableStatement) {
-        if (!node) {
-            return undefined;
-        }
-        var jsDocTags = getJSDocTags(node, checkParentVariableStatement);
-        if (!jsDocTags) {
-            return undefined;
-        }
-        for (var _i = 0, jsDocTags_1 = jsDocTags; _i < jsDocTags_1.length; _i++) {
-            var tag = jsDocTags_1[_i];
-            if (tag.kind === kind) {
-                return tag;
-            }
-        }
-    }
-    function append(previous, additional) {
-        if (additional) {
-            if (!previous) {
-                previous = [];
-            }
-            for (var _i = 0, additional_1 = additional; _i < additional_1.length; _i++) {
-                var x = additional_1[_i];
-                previous.push(x);
-            }
-        }
-        return previous;
+    function getCommentsFromJSDoc(node) {
+        return ts.map(getJSDocs(node), function (doc) { return doc.comment; });
+    }
+    ts.getCommentsFromJSDoc = getCommentsFromJSDoc;
+    function hasJSDocParameterTags(node) {
+        var parameterTags = getJSDocTags(node, 287 /* JSDocParameterTag */);
+        return parameterTags && parameterTags.length > 0;
+    }
+    ts.hasJSDocParameterTags = hasJSDocParameterTags;
+    function getJSDocTags(node, kind) {
+        return ts.flatMap(getJSDocs(node), function (doc) {
+            return doc.kind === 283 /* JSDocComment */
+                ? ts.filter(doc.tags, function (tag) { return tag.kind === kind; })
+                : doc.kind === kind && doc;
+        });
     }
-    function getJSDocComments(node, checkParentVariableStatement) {
-        return getJSDocs(node, checkParentVariableStatement, function (docs) { return ts.map(docs, function (doc) { return doc.comment; }); }, function (tags) { return ts.map(tags, function (tag) { return tag.comment; }); });
+    function getFirstJSDocTag(node, kind) {
+        return node && ts.firstOrUndefined(getJSDocTags(node, kind));
     }
-    ts.getJSDocComments = getJSDocComments;
-    function getJSDocTags(node, checkParentVariableStatement) {
-        return getJSDocs(node, checkParentVariableStatement, function (docs) {
-            var result = [];
-            for (var _i = 0, docs_1 = docs; _i < docs_1.length; _i++) {
-                var doc = docs_1[_i];
-                if (doc.tags) {
-                    result.push.apply(result, doc.tags);
-                }
-            }
-            return result;
-        }, function (tags) { return tags; });
-    }
-    function getJSDocs(node, checkParentVariableStatement, getDocs, getTags) {
-        // TODO: Get rid of getJsDocComments and friends (note the lowercase 's' in Js)
-        // TODO: A lot of this work should be cached, maybe. I guess it's only used in services right now...
-        var result = undefined;
-        // prepend documentation from parent sources
-        if (checkParentVariableStatement) {
+    function getJSDocs(node) {
+        if (ts.isJSDocTypedefTag(node)) {
+            return [node.parent];
+        }
+        var cache = node.jsDocCache;
+        if (!cache) {
+            getJSDocsWorker(node);
+            node.jsDocCache = cache;
+        }
+        return cache;
+        function getJSDocsWorker(node) {
+            var parent = node.parent;
             // Try to recognize this pattern when node is initializer of variable declaration and JSDoc comments are on containing variable statement.
             // /**
             //   * @param {number} name
             //   * @returns {number}
             //   */
             // var x = function(name) { return name.length; }
-            var isInitializerOfVariableDeclarationInStatement = isVariableLike(node.parent) &&
-                (node.parent).initializer === node &&
-                node.parent.parent.parent.kind === 200 /* VariableStatement */;
+            var isInitializerOfVariableDeclarationInStatement = isVariableLike(parent) &&
+                parent.initializer === node &&
+                parent.parent.parent.kind === 208 /* VariableStatement */;
             var isVariableOfVariableDeclarationStatement = isVariableLike(node) &&
-                node.parent.parent.kind === 200 /* VariableStatement */;
-            var variableStatementNode = isInitializerOfVariableDeclarationInStatement ? node.parent.parent.parent :
-                isVariableOfVariableDeclarationStatement ? node.parent.parent :
+                parent.parent.kind === 208 /* VariableStatement */;
+            var variableStatementNode = isInitializerOfVariableDeclarationInStatement ? parent.parent.parent :
+                isVariableOfVariableDeclarationStatement ? parent.parent :
                     undefined;
             if (variableStatementNode) {
-                result = append(result, getJSDocs(variableStatementNode, checkParentVariableStatement, getDocs, getTags));
-            }
-            if (node.kind === 225 /* ModuleDeclaration */ &&
-                node.parent && node.parent.kind === 225 /* ModuleDeclaration */) {
-                result = append(result, getJSDocs(node.parent, checkParentVariableStatement, getDocs, getTags));
+                getJSDocsWorker(variableStatementNode);
             }
             // Also recognize when the node is the RHS of an assignment expression
-            var parent_4 = node.parent;
-            var isSourceOfAssignmentExpressionStatement = parent_4 && parent_4.parent &&
-                parent_4.kind === 187 /* BinaryExpression */ &&
-                parent_4.operatorToken.kind === 56 /* EqualsToken */ &&
-                parent_4.parent.kind === 202 /* ExpressionStatement */;
+            var isSourceOfAssignmentExpressionStatement = parent && parent.parent &&
+                parent.kind === 194 /* BinaryExpression */ &&
+                parent.operatorToken.kind === 58 /* EqualsToken */ &&
+                parent.parent.kind === 210 /* ExpressionStatement */;
             if (isSourceOfAssignmentExpressionStatement) {
-                result = append(result, getJSDocs(parent_4.parent, checkParentVariableStatement, getDocs, getTags));
+                getJSDocsWorker(parent.parent);
             }
-            var isPropertyAssignmentExpression = parent_4 && parent_4.kind === 253 /* PropertyAssignment */;
-            if (isPropertyAssignmentExpression) {
-                result = append(result, getJSDocs(parent_4, checkParentVariableStatement, getDocs, getTags));
+            var isModuleDeclaration = node.kind === 233 /* ModuleDeclaration */ &&
+                parent && parent.kind === 233 /* ModuleDeclaration */;
+            var isPropertyAssignmentExpression = parent && parent.kind === 261 /* PropertyAssignment */;
+            if (isModuleDeclaration || isPropertyAssignmentExpression) {
+                getJSDocsWorker(parent);
             }
             // Pull parameter comments from declaring function as well
-            if (node.kind === 142 /* Parameter */) {
-                var paramTags = getJSDocParameterTag(node, checkParentVariableStatement);
-                if (paramTags) {
-                    result = append(result, getTags(paramTags));
-                }
+            if (node.kind === 146 /* Parameter */) {
+                cache = ts.concatenate(cache, getJSDocParameterTags(node));
             }
-        }
-        if (isVariableLike(node) && node.initializer) {
-            result = append(result, getJSDocs(node.initializer, /*checkParentVariableStatement*/ false, getDocs, getTags));
-        }
-        if (node.jsDocComments) {
-            if (result) {
-                result = append(result, getDocs(node.jsDocComments));
-            }
-            else {
-                return getDocs(node.jsDocComments);
+            if (isVariableLike(node) && node.initializer) {
+                cache = ts.concatenate(cache, node.initializer.jsDoc);
             }
+            cache = ts.concatenate(cache, node.jsDoc);
         }
-        return result;
     }
-    function getJSDocParameterTag(param, checkParentVariableStatement) {
+    ts.getJSDocs = getJSDocs;
+    function getJSDocParameterTags(param) {
         var func = param.parent;
-        var tags = getJSDocTags(func, checkParentVariableStatement);
+        var tags = getJSDocTags(func, 287 /* JSDocParameterTag */);
         if (!param.name) {
             // this is an anonymous jsdoc param from a `function(type1, type2): type3` specification
             var i = func.parameters.indexOf(param);
-            var paramTags = ts.filter(tags, function (tag) { return tag.kind === 275 /* JSDocParameterTag */; });
+            var paramTags = ts.filter(tags, function (tag) { return tag.kind === 287 /* JSDocParameterTag */; });
             if (paramTags && 0 <= i && i < paramTags.length) {
                 return [paramTags[i]];
             }
         }
-        else if (param.name.kind === 69 /* Identifier */) {
+        else if (param.name.kind === 71 /* Identifier */) {
             var name_5 = param.name.text;
-            var paramTags = ts.filter(tags, function (tag) { return tag.kind === 275 /* JSDocParameterTag */ && tag.parameterName.text === name_5; });
-            if (paramTags) {
-                return paramTags;
-            }
+            return ts.filter(tags, function (tag) { return tag.kind === 287 /* JSDocParameterTag */ && tag.name.text === name_5; });
         }
         else {
             // TODO: it's a destructured parameter, so it should look up an "object type" series of multiple lines
@@ -4981,40 +5520,58 @@ var ts;
             return undefined;
         }
     }
-    function getJSDocTypeTag(node) {
-        return getJSDocTag(node, 277 /* JSDocTypeTag */, /*checkParentVariableStatement*/ false);
+    ts.getJSDocParameterTags = getJSDocParameterTags;
+    /** Does the opposite of `getJSDocParameterTags`: given a JSDoc parameter, finds the parameter corresponding to it. */
+    function getParameterFromJSDoc(node) {
+        var name = node.name.text;
+        var grandParent = node.parent.parent;
+        ts.Debug.assert(node.parent.kind === 283 /* JSDocComment */);
+        if (!ts.isFunctionLike(grandParent)) {
+            return undefined;
+        }
+        return ts.find(grandParent.parameters, function (p) {
+            return p.name.kind === 71 /* Identifier */ && p.name.text === name;
+        });
     }
-    ts.getJSDocTypeTag = getJSDocTypeTag;
+    ts.getParameterFromJSDoc = getParameterFromJSDoc;
+    function getTypeParameterFromJsDoc(node) {
+        var name = node.name.text;
+        var typeParameters = node.parent.parent.parent.typeParameters;
+        return ts.find(typeParameters, function (p) { return p.name.text === name; });
+    }
+    ts.getTypeParameterFromJsDoc = getTypeParameterFromJsDoc;
+    function getJSDocType(node) {
+        var tag = getFirstJSDocTag(node, 289 /* JSDocTypeTag */);
+        if (!tag && node.kind === 146 /* Parameter */) {
+            var paramTags = getJSDocParameterTags(node);
+            if (paramTags) {
+                tag = ts.find(paramTags, function (tag) { return !!tag.typeExpression; });
+            }
+        }
+        return tag && tag.typeExpression && tag.typeExpression.type;
+    }
+    ts.getJSDocType = getJSDocType;
+    function getJSDocAugmentsTag(node) {
+        return getFirstJSDocTag(node, 285 /* JSDocAugmentsTag */);
+    }
+    ts.getJSDocAugmentsTag = getJSDocAugmentsTag;
+    function getJSDocClassTag(node) {
+        return getFirstJSDocTag(node, 286 /* JSDocClassTag */);
+    }
+    ts.getJSDocClassTag = getJSDocClassTag;
     function getJSDocReturnTag(node) {
-        return getJSDocTag(node, 276 /* JSDocReturnTag */, /*checkParentVariableStatement*/ true);
+        return getFirstJSDocTag(node, 288 /* JSDocReturnTag */);
     }
     ts.getJSDocReturnTag = getJSDocReturnTag;
+    function getJSDocReturnType(node) {
+        var returnTag = getJSDocReturnTag(node);
+        return returnTag && returnTag.typeExpression && returnTag.typeExpression.type;
+    }
+    ts.getJSDocReturnType = getJSDocReturnType;
     function getJSDocTemplateTag(node) {
-        return getJSDocTag(node, 278 /* JSDocTemplateTag */, /*checkParentVariableStatement*/ false);
+        return getFirstJSDocTag(node, 290 /* JSDocTemplateTag */);
     }
     ts.getJSDocTemplateTag = getJSDocTemplateTag;
-    function getCorrespondingJSDocParameterTag(parameter) {
-        if (parameter.name && parameter.name.kind === 69 /* Identifier */) {
-            // If it's a parameter, see if the parent has a jsdoc comment with an @param
-            // annotation.
-            var parameterName = parameter.name.text;
-            var jsDocTags = getJSDocTags(parameter.parent, /*checkParentVariableStatement*/ true);
-            if (!jsDocTags) {
-                return undefined;
-            }
-            for (var _i = 0, jsDocTags_2 = jsDocTags; _i < jsDocTags_2.length; _i++) {
-                var tag = jsDocTags_2[_i];
-                if (tag.kind === 275 /* JSDocParameterTag */) {
-                    var parameterTag = tag;
-                    if (parameterTag.parameterName.text === parameterName) {
-                        return parameterTag;
-                    }
-                }
-            }
-        }
-        return undefined;
-    }
-    ts.getCorrespondingJSDocParameterTag = getCorrespondingJSDocParameterTag;
     function hasRestParameter(s) {
         return isRestParameter(ts.lastOrUndefined(s.parameters));
     }
@@ -5024,14 +5581,11 @@ var ts;
     }
     ts.hasDeclaredRestParameter = hasDeclaredRestParameter;
     function isRestParameter(node) {
-        if (node && (node.flags & 1048576 /* JavaScriptFile */)) {
-            if (node.type && node.type.kind === 270 /* JSDocVariadicType */) {
+        if (node && (node.flags & 65536 /* JavaScriptFile */)) {
+            if (node.type && node.type.kind === 280 /* JSDocVariadicType */ ||
+                ts.forEach(getJSDocParameterTags(node), function (t) { return t.typeExpression && t.typeExpression.type.kind === 280 /* JSDocVariadicType */; })) {
                 return true;
             }
-            var paramTag = getCorrespondingJSDocParameterTag(node);
-            if (paramTag && paramTag.typeExpression) {
-                return paramTag.typeExpression.type.kind === 270 /* JSDocVariadicType */;
-            }
         }
         return isDeclaredRestParam(node);
     }
@@ -5040,31 +5594,72 @@ var ts;
         return node && node.dotDotDotToken !== undefined;
     }
     ts.isDeclaredRestParam = isDeclaredRestParam;
+    var AssignmentKind;
+    (function (AssignmentKind) {
+        AssignmentKind[AssignmentKind["None"] = 0] = "None";
+        AssignmentKind[AssignmentKind["Definite"] = 1] = "Definite";
+        AssignmentKind[AssignmentKind["Compound"] = 2] = "Compound";
+    })(AssignmentKind = ts.AssignmentKind || (ts.AssignmentKind = {}));
+    function getAssignmentTargetKind(node) {
+        var parent = node.parent;
+        while (true) {
+            switch (parent.kind) {
+                case 194 /* BinaryExpression */:
+                    var binaryOperator = parent.operatorToken.kind;
+                    return isAssignmentOperator(binaryOperator) && parent.left === node ?
+                        binaryOperator === 58 /* EqualsToken */ ? 1 /* Definite */ : 2 /* Compound */ :
+                        0 /* None */;
+                case 192 /* PrefixUnaryExpression */:
+                case 193 /* PostfixUnaryExpression */:
+                    var unaryOperator = parent.operator;
+                    return unaryOperator === 43 /* PlusPlusToken */ || unaryOperator === 44 /* MinusMinusToken */ ? 2 /* Compound */ : 0 /* None */;
+                case 215 /* ForInStatement */:
+                case 216 /* ForOfStatement */:
+                    return parent.initializer === node ? 1 /* Definite */ : 0 /* None */;
+                case 185 /* ParenthesizedExpression */:
+                case 177 /* ArrayLiteralExpression */:
+                case 198 /* SpreadElement */:
+                    node = parent;
+                    break;
+                case 262 /* ShorthandPropertyAssignment */:
+                    if (parent.name !== node) {
+                        return 0 /* None */;
+                    }
+                    node = parent.parent;
+                    break;
+                case 261 /* PropertyAssignment */:
+                    if (parent.name === node) {
+                        return 0 /* None */;
+                    }
+                    node = parent.parent;
+                    break;
+                default:
+                    return 0 /* None */;
+            }
+            parent = node.parent;
+        }
+    }
+    ts.getAssignmentTargetKind = getAssignmentTargetKind;
     // A node is an assignment target if it is on the left hand side of an '=' token, if it is parented by a property
     // assignment in an object literal that is an assignment target, or if it is parented by an array literal that is
-    // an assignment target. Examples include 'a = xxx', '{ p: a } = xxx', '[{ p: a}] = xxx'.
+    // an assignment target. Examples include 'a = xxx', '{ p: a } = xxx', '[{ a }] = xxx'.
+    // (Note that `p` is not a target in the above examples, only `a`.)
     function isAssignmentTarget(node) {
-        while (node.parent.kind === 178 /* ParenthesizedExpression */) {
-            node = node.parent;
+        return getAssignmentTargetKind(node) !== 0 /* None */;
+    }
+    ts.isAssignmentTarget = isAssignmentTarget;
+    // a node is delete target iff. it is PropertyAccessExpression/ElementAccessExpression with parentheses skipped
+    function isDeleteTarget(node) {
+        if (node.kind !== 179 /* PropertyAccessExpression */ && node.kind !== 180 /* ElementAccessExpression */) {
+            return false;
         }
-        while (true) {
-            var parent_5 = node.parent;
-            if (parent_5.kind === 170 /* ArrayLiteralExpression */ || parent_5.kind === 191 /* SpreadElementExpression */) {
-                node = parent_5;
-                continue;
-            }
-            if (parent_5.kind === 253 /* PropertyAssignment */ || parent_5.kind === 254 /* ShorthandPropertyAssignment */) {
-                node = parent_5.parent;
-                continue;
-            }
-            return parent_5.kind === 187 /* BinaryExpression */ &&
-                isAssignmentOperator(parent_5.operatorToken.kind) &&
-                parent_5.left === node ||
-                (parent_5.kind === 207 /* ForInStatement */ || parent_5.kind === 208 /* ForOfStatement */) &&
-                    parent_5.initializer === node;
+        node = node.parent;
+        while (node && node.kind === 185 /* ParenthesizedExpression */) {
+            node = node.parent;
         }
+        return node && node.kind === 188 /* DeleteExpression */;
     }
-    ts.isAssignmentTarget = isAssignmentTarget;
+    ts.isDeleteTarget = isDeleteTarget;
     function isNodeDescendantOf(node, ancestor) {
         while (node) {
             if (node === ancestor)
@@ -5076,7 +5671,7 @@ var ts;
     ts.isNodeDescendantOf = isNodeDescendantOf;
     function isInAmbientContext(node) {
         while (node) {
-            if (hasModifier(node, 2 /* Ambient */) || (node.kind === 256 /* SourceFile */ && node.isDeclarationFile)) {
+            if (hasModifier(node, 2 /* Ambient */) || (node.kind === 265 /* SourceFile */ && node.isDeclarationFile)) {
                 return true;
             }
             node = node.parent;
@@ -5086,56 +5681,68 @@ var ts;
     ts.isInAmbientContext = isInAmbientContext;
     // True if the given identifier, string literal, or number literal is the name of a declaration node
     function isDeclarationName(name) {
-        if (name.kind !== 69 /* Identifier */ && name.kind !== 9 /* StringLiteral */ && name.kind !== 8 /* NumericLiteral */) {
-            return false;
-        }
-        var parent = name.parent;
-        if (parent.kind === 234 /* ImportSpecifier */ || parent.kind === 238 /* ExportSpecifier */) {
-            if (parent.propertyName) {
-                return true;
-            }
-        }
-        if (isDeclaration(parent)) {
-            return parent.name === name;
+        switch (name.kind) {
+            case 71 /* Identifier */:
+            case 9 /* StringLiteral */:
+            case 8 /* NumericLiteral */:
+                return ts.isDeclaration(name.parent) && name.parent.name === name;
+            default:
+                return false;
         }
-        return false;
     }
     ts.isDeclarationName = isDeclarationName;
+    /* @internal */
+    // See GH#16030
+    function isAnyDeclarationName(name) {
+        switch (name.kind) {
+            case 71 /* Identifier */:
+            case 9 /* StringLiteral */:
+            case 8 /* NumericLiteral */:
+                if (ts.isDeclaration(name.parent)) {
+                    return name.parent.name === name;
+                }
+                var binExp = name.parent.parent;
+                return ts.isBinaryExpression(binExp) && getSpecialPropertyAssignmentKind(binExp) !== 0 /* None */ && ts.getNameOfDeclaration(binExp) === name;
+            default:
+                return false;
+        }
+    }
+    ts.isAnyDeclarationName = isAnyDeclarationName;
     function isLiteralComputedPropertyDeclarationName(node) {
         return (node.kind === 9 /* StringLiteral */ || node.kind === 8 /* NumericLiteral */) &&
-            node.parent.kind === 140 /* ComputedPropertyName */ &&
-            isDeclaration(node.parent.parent);
+            node.parent.kind === 144 /* ComputedPropertyName */ &&
+            ts.isDeclaration(node.parent.parent);
     }
     ts.isLiteralComputedPropertyDeclarationName = isLiteralComputedPropertyDeclarationName;
     // Return true if the given identifier is classified as an IdentifierName
     function isIdentifierName(node) {
         var parent = node.parent;
         switch (parent.kind) {
-            case 145 /* PropertyDeclaration */:
-            case 144 /* PropertySignature */:
-            case 147 /* MethodDeclaration */:
-            case 146 /* MethodSignature */:
-            case 149 /* GetAccessor */:
-            case 150 /* SetAccessor */:
-            case 255 /* EnumMember */:
-            case 253 /* PropertyAssignment */:
-            case 172 /* PropertyAccessExpression */:
+            case 149 /* PropertyDeclaration */:
+            case 148 /* PropertySignature */:
+            case 151 /* MethodDeclaration */:
+            case 150 /* MethodSignature */:
+            case 153 /* GetAccessor */:
+            case 154 /* SetAccessor */:
+            case 264 /* EnumMember */:
+            case 261 /* PropertyAssignment */:
+            case 179 /* PropertyAccessExpression */:
                 // Name in member declaration or property name in property access
                 return parent.name === node;
-            case 139 /* QualifiedName */:
+            case 143 /* QualifiedName */:
                 // Name on right hand side of dot in a type query
                 if (parent.right === node) {
-                    while (parent.kind === 139 /* QualifiedName */) {
+                    while (parent.kind === 143 /* QualifiedName */) {
                         parent = parent.parent;
                     }
-                    return parent.kind === 158 /* TypeQuery */;
+                    return parent.kind === 162 /* TypeQuery */;
                 }
                 return false;
-            case 169 /* BindingElement */:
-            case 234 /* ImportSpecifier */:
+            case 176 /* BindingElement */:
+            case 242 /* ImportSpecifier */:
                 // Property name in binding element or import specifier
                 return parent.propertyName === node;
-            case 238 /* ExportSpecifier */:
+            case 246 /* ExportSpecifier */:
                 // Any name in an export specifier
                 return true;
         }
@@ -5151,13 +5758,13 @@ var ts;
     // export = <EntityNameExpression>
     // export default <EntityNameExpression>
     function isAliasSymbolDeclaration(node) {
-        return node.kind === 229 /* ImportEqualsDeclaration */ ||
-            node.kind === 228 /* NamespaceExportDeclaration */ ||
-            node.kind === 231 /* ImportClause */ && !!node.name ||
-            node.kind === 232 /* NamespaceImport */ ||
-            node.kind === 234 /* ImportSpecifier */ ||
-            node.kind === 238 /* ExportSpecifier */ ||
-            node.kind === 235 /* ExportAssignment */ && exportAssignmentIsAlias(node);
+        return node.kind === 237 /* ImportEqualsDeclaration */ ||
+            node.kind === 236 /* NamespaceExportDeclaration */ ||
+            node.kind === 239 /* ImportClause */ && !!node.name ||
+            node.kind === 240 /* NamespaceImport */ ||
+            node.kind === 242 /* ImportSpecifier */ ||
+            node.kind === 246 /* ExportSpecifier */ ||
+            node.kind === 243 /* ExportAssignment */ && exportAssignmentIsAlias(node);
     }
     ts.isAliasSymbolDeclaration = isAliasSymbolDeclaration;
     function exportAssignmentIsAlias(node) {
@@ -5165,17 +5772,17 @@ var ts;
     }
     ts.exportAssignmentIsAlias = exportAssignmentIsAlias;
     function getClassExtendsHeritageClauseElement(node) {
-        var heritageClause = getHeritageClause(node.heritageClauses, 83 /* ExtendsKeyword */);
+        var heritageClause = getHeritageClause(node.heritageClauses, 85 /* ExtendsKeyword */);
         return heritageClause && heritageClause.types.length > 0 ? heritageClause.types[0] : undefined;
     }
     ts.getClassExtendsHeritageClauseElement = getClassExtendsHeritageClauseElement;
     function getClassImplementsHeritageClauseElements(node) {
-        var heritageClause = getHeritageClause(node.heritageClauses, 106 /* ImplementsKeyword */);
+        var heritageClause = getHeritageClause(node.heritageClauses, 108 /* ImplementsKeyword */);
         return heritageClause ? heritageClause.types : undefined;
     }
     ts.getClassImplementsHeritageClauseElements = getClassImplementsHeritageClauseElements;
     function getInterfaceBaseTypeNodes(node) {
-        var heritageClause = getHeritageClause(node.heritageClauses, 83 /* ExtendsKeyword */);
+        var heritageClause = getHeritageClause(node.heritageClauses, 85 /* ExtendsKeyword */);
         return heritageClause ? heritageClause.types : undefined;
     }
     ts.getInterfaceBaseTypeNodes = getInterfaceBaseTypeNodes;
@@ -5213,21 +5820,19 @@ var ts;
         var isNoDefaultLibRegEx = /^(\/\/\/\s*<reference\s+no-default-lib\s*=\s*)('|")(.+?)\2\s*\/>/gim;
         if (simpleReferenceRegEx.test(comment)) {
             if (isNoDefaultLibRegEx.test(comment)) {
-                return {
-                    isNoDefaultLib: true
-                };
+                return { isNoDefaultLib: true };
             }
             else {
                 var refMatchResult = ts.fullTripleSlashReferencePathRegEx.exec(comment);
                 var refLibResult = !refMatchResult && ts.fullTripleSlashReferenceTypeReferenceDirectiveRegEx.exec(comment);
-                if (refMatchResult || refLibResult) {
-                    var start = commentRange.pos;
-                    var end = commentRange.end;
+                var match = refMatchResult || refLibResult;
+                if (match) {
+                    var pos = commentRange.pos + match[1].length + match[2].length;
                     return {
                         fileReference: {
-                            pos: start,
-                            end: end,
-                            fileName: (refMatchResult || refLibResult)[3]
+                            pos: pos,
+                            end: pos + match[3].length,
+                            fileName: match[3]
                         },
                         isNoDefaultLib: false,
                         isTypeReferenceDirective: !!refLibResult
@@ -5243,19 +5848,63 @@ var ts;
     }
     ts.getFileReferenceFromReferencePath = getFileReferenceFromReferencePath;
     function isKeyword(token) {
-        return 70 /* FirstKeyword */ <= token && token <= 138 /* LastKeyword */;
+        return 72 /* FirstKeyword */ <= token && token <= 142 /* LastKeyword */;
     }
     ts.isKeyword = isKeyword;
     function isTrivia(token) {
         return 2 /* FirstTriviaToken */ <= token && token <= 7 /* LastTriviaToken */;
     }
     ts.isTrivia = isTrivia;
-    function isAsyncFunctionLike(node) {
-        return isFunctionLike(node) && hasModifier(node, 256 /* Async */) && !isAccessor(node);
+    var FunctionFlags;
+    (function (FunctionFlags) {
+        FunctionFlags[FunctionFlags["Normal"] = 0] = "Normal";
+        FunctionFlags[FunctionFlags["Generator"] = 1] = "Generator";
+        FunctionFlags[FunctionFlags["Async"] = 2] = "Async";
+        FunctionFlags[FunctionFlags["Invalid"] = 4] = "Invalid";
+        FunctionFlags[FunctionFlags["AsyncGenerator"] = 3] = "AsyncGenerator";
+    })(FunctionFlags = ts.FunctionFlags || (ts.FunctionFlags = {}));
+    function getFunctionFlags(node) {
+        if (!node) {
+            return 4 /* Invalid */;
+        }
+        var flags = 0 /* Normal */;
+        switch (node.kind) {
+            case 228 /* FunctionDeclaration */:
+            case 186 /* FunctionExpression */:
+            case 151 /* MethodDeclaration */:
+                if (node.asteriskToken) {
+                    flags |= 1 /* Generator */;
+                }
+            // falls through
+            case 187 /* ArrowFunction */:
+                if (hasModifier(node, 256 /* Async */)) {
+                    flags |= 2 /* Async */;
+                }
+                break;
+        }
+        if (!node.body) {
+            flags |= 4 /* Invalid */;
+        }
+        return flags;
     }
-    ts.isAsyncFunctionLike = isAsyncFunctionLike;
-    function isStringOrNumericLiteral(kind) {
-        return kind === 9 /* StringLiteral */ || kind === 8 /* NumericLiteral */;
+    ts.getFunctionFlags = getFunctionFlags;
+    function isAsyncFunction(node) {
+        switch (node.kind) {
+            case 228 /* FunctionDeclaration */:
+            case 186 /* FunctionExpression */:
+            case 187 /* ArrowFunction */:
+            case 151 /* MethodDeclaration */:
+                return node.body !== undefined
+                    && node.asteriskToken === undefined
+                    && hasModifier(node, 256 /* Async */);
+        }
+        return false;
+    }
+    ts.isAsyncFunction = isAsyncFunction;
+    function isStringOrNumericLiteral(node) {
+        var kind = node.kind;
+        return kind === 9 /* StringLiteral */
+            || kind === 8 /* NumericLiteral */;
     }
     ts.isStringOrNumericLiteral = isStringOrNumericLiteral;
     /**
@@ -5266,12 +5915,13 @@ var ts;
      *      Symbol.
      */
     function hasDynamicName(declaration) {
-        return declaration.name && isDynamicName(declaration.name);
+        var name = ts.getNameOfDeclaration(declaration);
+        return name && isDynamicName(name);
     }
     ts.hasDynamicName = hasDynamicName;
     function isDynamicName(name) {
-        return name.kind === 140 /* ComputedPropertyName */ &&
-            !isStringOrNumericLiteral(name.expression.kind) &&
+        return name.kind === 144 /* ComputedPropertyName */ &&
+            !isStringOrNumericLiteral(name.expression) &&
             !isWellKnownSymbolSyntactically(name.expression);
     }
     ts.isDynamicName = isDynamicName;
@@ -5281,14 +5931,14 @@ var ts;
      * where Symbol is literally the word "Symbol", and name is any identifierName
      */
     function isWellKnownSymbolSyntactically(node) {
-        return isPropertyAccessExpression(node) && isESSymbolIdentifier(node.expression);
+        return ts.isPropertyAccessExpression(node) && isESSymbolIdentifier(node.expression);
     }
     ts.isWellKnownSymbolSyntactically = isWellKnownSymbolSyntactically;
     function getPropertyNameForPropertyNameNode(name) {
-        if (name.kind === 69 /* Identifier */ || name.kind === 9 /* StringLiteral */ || name.kind === 8 /* NumericLiteral */ || name.kind === 142 /* Parameter */) {
+        if (name.kind === 71 /* Identifier */ || name.kind === 9 /* StringLiteral */ || name.kind === 8 /* NumericLiteral */ || name.kind === 146 /* Parameter */) {
             return name.text;
         }
-        if (name.kind === 140 /* ComputedPropertyName */) {
+        if (name.kind === 144 /* ComputedPropertyName */) {
             var nameExpression = name.expression;
             if (isWellKnownSymbolSyntactically(nameExpression)) {
                 var rightHandSideName = nameExpression.name.text;
@@ -5309,34 +5959,20 @@ var ts;
      * Includes the word "Symbol" with unicode escapes
      */
     function isESSymbolIdentifier(node) {
-        return node.kind === 69 /* Identifier */ && node.text === "Symbol";
+        return node.kind === 71 /* Identifier */ && node.text === "Symbol";
     }
     ts.isESSymbolIdentifier = isESSymbolIdentifier;
-    function isModifierKind(token) {
-        switch (token) {
-            case 115 /* AbstractKeyword */:
-            case 118 /* AsyncKeyword */:
-            case 74 /* ConstKeyword */:
-            case 122 /* DeclareKeyword */:
-            case 77 /* DefaultKeyword */:
-            case 82 /* ExportKeyword */:
-            case 112 /* PublicKeyword */:
-            case 110 /* PrivateKeyword */:
-            case 111 /* ProtectedKeyword */:
-            case 128 /* ReadonlyKeyword */:
-            case 113 /* StaticKeyword */:
-                return true;
-        }
-        return false;
+    function isPushOrUnshiftIdentifier(node) {
+        return node.text === "push" || node.text === "unshift";
     }
-    ts.isModifierKind = isModifierKind;
+    ts.isPushOrUnshiftIdentifier = isPushOrUnshiftIdentifier;
     function isParameterDeclaration(node) {
         var root = getRootDeclaration(node);
-        return root.kind === 142 /* Parameter */;
+        return root.kind === 146 /* Parameter */;
     }
     ts.isParameterDeclaration = isParameterDeclaration;
     function getRootDeclaration(node) {
-        while (node.kind === 169 /* BindingElement */) {
+        while (node.kind === 176 /* BindingElement */) {
             node = node.parent.parent;
         }
         return node;
@@ -5344,15 +5980,15 @@ var ts;
     ts.getRootDeclaration = getRootDeclaration;
     function nodeStartsNewLexicalEnvironment(node) {
         var kind = node.kind;
-        return kind === 148 /* Constructor */
-            || kind === 179 /* FunctionExpression */
-            || kind === 220 /* FunctionDeclaration */
-            || kind === 180 /* ArrowFunction */
-            || kind === 147 /* MethodDeclaration */
-            || kind === 149 /* GetAccessor */
-            || kind === 150 /* SetAccessor */
-            || kind === 225 /* ModuleDeclaration */
-            || kind === 256 /* SourceFile */;
+        return kind === 152 /* Constructor */
+            || kind === 186 /* FunctionExpression */
+            || kind === 228 /* FunctionDeclaration */
+            || kind === 187 /* ArrowFunction */
+            || kind === 151 /* MethodDeclaration */
+            || kind === 153 /* GetAccessor */
+            || kind === 154 /* SetAccessor */
+            || kind === 233 /* ModuleDeclaration */
+            || kind === 265 /* SourceFile */;
     }
     ts.nodeStartsNewLexicalEnvironment = nodeStartsNewLexicalEnvironment;
     function nodeIsSynthesized(node) {
@@ -5360,91 +5996,53 @@ var ts;
             || ts.positionIsSynthesized(node.end);
     }
     ts.nodeIsSynthesized = nodeIsSynthesized;
-    function getOriginalNode(node) {
-        if (node) {
-            while (node.original !== undefined) {
-                node = node.original;
-            }
-        }
-        return node;
+    function getOriginalSourceFile(sourceFile) {
+        return ts.getParseTreeNode(sourceFile, ts.isSourceFile) || sourceFile;
     }
-    ts.getOriginalNode = getOriginalNode;
-    /**
-     * Gets a value indicating whether a node originated in the parse tree.
-     *
-     * @param node The node to test.
-     */
-    function isParseTreeNode(node) {
-        return (node.flags & 8 /* Synthesized */) === 0;
-    }
-    ts.isParseTreeNode = isParseTreeNode;
-    function getParseTreeNode(node, nodeTest) {
-        if (isParseTreeNode(node)) {
-            return node;
-        }
-        node = getOriginalNode(node);
-        if (isParseTreeNode(node) && (!nodeTest || nodeTest(node))) {
-            return node;
-        }
-        return undefined;
-    }
-    ts.getParseTreeNode = getParseTreeNode;
+    ts.getOriginalSourceFile = getOriginalSourceFile;
     function getOriginalSourceFiles(sourceFiles) {
-        var originalSourceFiles = [];
-        for (var _i = 0, sourceFiles_1 = sourceFiles; _i < sourceFiles_1.length; _i++) {
-            var sourceFile = sourceFiles_1[_i];
-            var originalSourceFile = getParseTreeNode(sourceFile, isSourceFile);
-            if (originalSourceFile) {
-                originalSourceFiles.push(originalSourceFile);
-            }
-        }
-        return originalSourceFiles;
+        return ts.sameMap(sourceFiles, getOriginalSourceFile);
     }
     ts.getOriginalSourceFiles = getOriginalSourceFiles;
-    function getOriginalNodeId(node) {
-        node = getOriginalNode(node);
-        return node ? ts.getNodeId(node) : 0;
-    }
-    ts.getOriginalNodeId = getOriginalNodeId;
+    var Associativity;
     (function (Associativity) {
         Associativity[Associativity["Left"] = 0] = "Left";
         Associativity[Associativity["Right"] = 1] = "Right";
-    })(ts.Associativity || (ts.Associativity = {}));
-    var Associativity = ts.Associativity;
+    })(Associativity = ts.Associativity || (ts.Associativity = {}));
     function getExpressionAssociativity(expression) {
         var operator = getOperator(expression);
-        var hasArguments = expression.kind === 175 /* NewExpression */ && expression.arguments !== undefined;
+        var hasArguments = expression.kind === 182 /* NewExpression */ && expression.arguments !== undefined;
         return getOperatorAssociativity(expression.kind, operator, hasArguments);
     }
     ts.getExpressionAssociativity = getExpressionAssociativity;
     function getOperatorAssociativity(kind, operator, hasArguments) {
         switch (kind) {
-            case 175 /* NewExpression */:
+            case 182 /* NewExpression */:
                 return hasArguments ? 0 /* Left */ : 1 /* Right */;
-            case 185 /* PrefixUnaryExpression */:
-            case 182 /* TypeOfExpression */:
-            case 183 /* VoidExpression */:
-            case 181 /* DeleteExpression */:
-            case 184 /* AwaitExpression */:
-            case 188 /* ConditionalExpression */:
-            case 190 /* YieldExpression */:
+            case 192 /* PrefixUnaryExpression */:
+            case 189 /* TypeOfExpression */:
+            case 190 /* VoidExpression */:
+            case 188 /* DeleteExpression */:
+            case 191 /* AwaitExpression */:
+            case 195 /* ConditionalExpression */:
+            case 197 /* YieldExpression */:
                 return 1 /* Right */;
-            case 187 /* BinaryExpression */:
+            case 194 /* BinaryExpression */:
                 switch (operator) {
-                    case 38 /* AsteriskAsteriskToken */:
-                    case 56 /* EqualsToken */:
-                    case 57 /* PlusEqualsToken */:
-                    case 58 /* MinusEqualsToken */:
-                    case 60 /* AsteriskAsteriskEqualsToken */:
-                    case 59 /* AsteriskEqualsToken */:
-                    case 61 /* SlashEqualsToken */:
-                    case 62 /* PercentEqualsToken */:
-                    case 63 /* LessThanLessThanEqualsToken */:
-                    case 64 /* GreaterThanGreaterThanEqualsToken */:
-                    case 65 /* GreaterThanGreaterThanGreaterThanEqualsToken */:
-                    case 66 /* AmpersandEqualsToken */:
-                    case 68 /* CaretEqualsToken */:
-                    case 67 /* BarEqualsToken */:
+                    case 40 /* AsteriskAsteriskToken */:
+                    case 58 /* EqualsToken */:
+                    case 59 /* PlusEqualsToken */:
+                    case 60 /* MinusEqualsToken */:
+                    case 62 /* AsteriskAsteriskEqualsToken */:
+                    case 61 /* AsteriskEqualsToken */:
+                    case 63 /* SlashEqualsToken */:
+                    case 64 /* PercentEqualsToken */:
+                    case 65 /* LessThanLessThanEqualsToken */:
+                    case 66 /* GreaterThanGreaterThanEqualsToken */:
+                    case 67 /* GreaterThanGreaterThanGreaterThanEqualsToken */:
+                    case 68 /* AmpersandEqualsToken */:
+                    case 70 /* CaretEqualsToken */:
+                    case 69 /* BarEqualsToken */:
                         return 1 /* Right */;
                 }
         }
@@ -5453,15 +6051,15 @@ var ts;
     ts.getOperatorAssociativity = getOperatorAssociativity;
     function getExpressionPrecedence(expression) {
         var operator = getOperator(expression);
-        var hasArguments = expression.kind === 175 /* NewExpression */ && expression.arguments !== undefined;
+        var hasArguments = expression.kind === 182 /* NewExpression */ && expression.arguments !== undefined;
         return getOperatorPrecedence(expression.kind, operator, hasArguments);
     }
     ts.getExpressionPrecedence = getExpressionPrecedence;
     function getOperator(expression) {
-        if (expression.kind === 187 /* BinaryExpression */) {
+        if (expression.kind === 194 /* BinaryExpression */) {
             return expression.operatorToken.kind;
         }
-        else if (expression.kind === 185 /* PrefixUnaryExpression */ || expression.kind === 186 /* PostfixUnaryExpression */) {
+        else if (expression.kind === 192 /* PrefixUnaryExpression */ || expression.kind === 193 /* PostfixUnaryExpression */) {
             return expression.operator;
         }
         else {
@@ -5471,107 +6069,109 @@ var ts;
     ts.getOperator = getOperator;
     function getOperatorPrecedence(nodeKind, operatorKind, hasArguments) {
         switch (nodeKind) {
-            case 97 /* ThisKeyword */:
-            case 95 /* SuperKeyword */:
-            case 69 /* Identifier */:
-            case 93 /* NullKeyword */:
-            case 99 /* TrueKeyword */:
-            case 84 /* FalseKeyword */:
+            case 99 /* ThisKeyword */:
+            case 97 /* SuperKeyword */:
+            case 71 /* Identifier */:
+            case 95 /* NullKeyword */:
+            case 101 /* TrueKeyword */:
+            case 86 /* FalseKeyword */:
             case 8 /* NumericLiteral */:
             case 9 /* StringLiteral */:
-            case 170 /* ArrayLiteralExpression */:
-            case 171 /* ObjectLiteralExpression */:
-            case 179 /* FunctionExpression */:
-            case 180 /* ArrowFunction */:
-            case 192 /* ClassExpression */:
-            case 241 /* JsxElement */:
-            case 242 /* JsxSelfClosingElement */:
-            case 10 /* RegularExpressionLiteral */:
-            case 11 /* NoSubstitutionTemplateLiteral */:
-            case 189 /* TemplateExpression */:
-            case 178 /* ParenthesizedExpression */:
-            case 193 /* OmittedExpression */:
+            case 177 /* ArrayLiteralExpression */:
+            case 178 /* ObjectLiteralExpression */:
+            case 186 /* FunctionExpression */:
+            case 187 /* ArrowFunction */:
+            case 199 /* ClassExpression */:
+            case 249 /* JsxElement */:
+            case 250 /* JsxSelfClosingElement */:
+            case 12 /* RegularExpressionLiteral */:
+            case 13 /* NoSubstitutionTemplateLiteral */:
+            case 196 /* TemplateExpression */:
+            case 185 /* ParenthesizedExpression */:
+            case 200 /* OmittedExpression */:
                 return 19;
-            case 176 /* TaggedTemplateExpression */:
-            case 172 /* PropertyAccessExpression */:
-            case 173 /* ElementAccessExpression */:
+            case 183 /* TaggedTemplateExpression */:
+            case 179 /* PropertyAccessExpression */:
+            case 180 /* ElementAccessExpression */:
                 return 18;
-            case 175 /* NewExpression */:
+            case 182 /* NewExpression */:
                 return hasArguments ? 18 : 17;
-            case 174 /* CallExpression */:
+            case 181 /* CallExpression */:
                 return 17;
-            case 186 /* PostfixUnaryExpression */:
+            case 193 /* PostfixUnaryExpression */:
                 return 16;
-            case 185 /* PrefixUnaryExpression */:
-            case 182 /* TypeOfExpression */:
-            case 183 /* VoidExpression */:
-            case 181 /* DeleteExpression */:
-            case 184 /* AwaitExpression */:
+            case 192 /* PrefixUnaryExpression */:
+            case 189 /* TypeOfExpression */:
+            case 190 /* VoidExpression */:
+            case 188 /* DeleteExpression */:
+            case 191 /* AwaitExpression */:
                 return 15;
-            case 187 /* BinaryExpression */:
+            case 194 /* BinaryExpression */:
                 switch (operatorKind) {
-                    case 49 /* ExclamationToken */:
-                    case 50 /* TildeToken */:
+                    case 51 /* ExclamationToken */:
+                    case 52 /* TildeToken */:
                         return 15;
-                    case 38 /* AsteriskAsteriskToken */:
-                    case 37 /* AsteriskToken */:
-                    case 39 /* SlashToken */:
-                    case 40 /* PercentToken */:
+                    case 40 /* AsteriskAsteriskToken */:
+                    case 39 /* AsteriskToken */:
+                    case 41 /* SlashToken */:
+                    case 42 /* PercentToken */:
                         return 14;
-                    case 35 /* PlusToken */:
-                    case 36 /* MinusToken */:
+                    case 37 /* PlusToken */:
+                    case 38 /* MinusToken */:
                         return 13;
-                    case 43 /* LessThanLessThanToken */:
-                    case 44 /* GreaterThanGreaterThanToken */:
-                    case 45 /* GreaterThanGreaterThanGreaterThanToken */:
+                    case 45 /* LessThanLessThanToken */:
+                    case 46 /* GreaterThanGreaterThanToken */:
+                    case 47 /* GreaterThanGreaterThanGreaterThanToken */:
                         return 12;
-                    case 25 /* LessThanToken */:
-                    case 28 /* LessThanEqualsToken */:
-                    case 27 /* GreaterThanToken */:
-                    case 29 /* GreaterThanEqualsToken */:
-                    case 90 /* InKeyword */:
-                    case 91 /* InstanceOfKeyword */:
+                    case 27 /* LessThanToken */:
+                    case 30 /* LessThanEqualsToken */:
+                    case 29 /* GreaterThanToken */:
+                    case 31 /* GreaterThanEqualsToken */:
+                    case 92 /* InKeyword */:
+                    case 93 /* InstanceOfKeyword */:
                         return 11;
-                    case 30 /* EqualsEqualsToken */:
-                    case 32 /* EqualsEqualsEqualsToken */:
-                    case 31 /* ExclamationEqualsToken */:
-                    case 33 /* ExclamationEqualsEqualsToken */:
+                    case 32 /* EqualsEqualsToken */:
+                    case 34 /* EqualsEqualsEqualsToken */:
+                    case 33 /* ExclamationEqualsToken */:
+                    case 35 /* ExclamationEqualsEqualsToken */:
                         return 10;
-                    case 46 /* AmpersandToken */:
+                    case 48 /* AmpersandToken */:
                         return 9;
-                    case 48 /* CaretToken */:
+                    case 50 /* CaretToken */:
                         return 8;
-                    case 47 /* BarToken */:
+                    case 49 /* BarToken */:
                         return 7;
-                    case 51 /* AmpersandAmpersandToken */:
+                    case 53 /* AmpersandAmpersandToken */:
                         return 6;
-                    case 52 /* BarBarToken */:
+                    case 54 /* BarBarToken */:
                         return 5;
-                    case 56 /* EqualsToken */:
-                    case 57 /* PlusEqualsToken */:
-                    case 58 /* MinusEqualsToken */:
-                    case 60 /* AsteriskAsteriskEqualsToken */:
-                    case 59 /* AsteriskEqualsToken */:
-                    case 61 /* SlashEqualsToken */:
-                    case 62 /* PercentEqualsToken */:
-                    case 63 /* LessThanLessThanEqualsToken */:
-                    case 64 /* GreaterThanGreaterThanEqualsToken */:
-                    case 65 /* GreaterThanGreaterThanGreaterThanEqualsToken */:
-                    case 66 /* AmpersandEqualsToken */:
-                    case 68 /* CaretEqualsToken */:
-                    case 67 /* BarEqualsToken */:
+                    case 58 /* EqualsToken */:
+                    case 59 /* PlusEqualsToken */:
+                    case 60 /* MinusEqualsToken */:
+                    case 62 /* AsteriskAsteriskEqualsToken */:
+                    case 61 /* AsteriskEqualsToken */:
+                    case 63 /* SlashEqualsToken */:
+                    case 64 /* PercentEqualsToken */:
+                    case 65 /* LessThanLessThanEqualsToken */:
+                    case 66 /* GreaterThanGreaterThanEqualsToken */:
+                    case 67 /* GreaterThanGreaterThanGreaterThanEqualsToken */:
+                    case 68 /* AmpersandEqualsToken */:
+                    case 70 /* CaretEqualsToken */:
+                    case 69 /* BarEqualsToken */:
                         return 3;
-                    case 24 /* CommaToken */:
+                    case 26 /* CommaToken */:
                         return 0;
                     default:
                         return -1;
                 }
-            case 188 /* ConditionalExpression */:
+            case 195 /* ConditionalExpression */:
                 return 4;
-            case 190 /* YieldExpression */:
+            case 197 /* YieldExpression */:
                 return 2;
-            case 191 /* SpreadElementExpression */:
+            case 198 /* SpreadElement */:
                 return 1;
+            case 298 /* CommaListExpression */:
+                return 0;
             default:
                 return -1;
         }
@@ -5593,21 +6193,15 @@ var ts;
             return modificationCount;
         }
         function reattachFileDiagnostics(newFile) {
-            if (!ts.hasProperty(fileDiagnostics, newFile.fileName)) {
-                return;
-            }
-            for (var _i = 0, _a = fileDiagnostics[newFile.fileName]; _i < _a.length; _i++) {
-                var diagnostic = _a[_i];
-                diagnostic.file = newFile;
-            }
+            ts.forEach(fileDiagnostics.get(newFile.fileName), function (diagnostic) { return diagnostic.file = newFile; });
         }
         function add(diagnostic) {
             var diagnostics;
             if (diagnostic.file) {
-                diagnostics = fileDiagnostics[diagnostic.file.fileName];
+                diagnostics = fileDiagnostics.get(diagnostic.file.fileName);
                 if (!diagnostics) {
                     diagnostics = [];
-                    fileDiagnostics[diagnostic.file.fileName] = diagnostics;
+                    fileDiagnostics.set(diagnostic.file.fileName, diagnostics);
                 }
             }
             else {
@@ -5624,16 +6218,16 @@ var ts;
         function getDiagnostics(fileName) {
             sortAndDeduplicate();
             if (fileName) {
-                return fileDiagnostics[fileName] || [];
+                return fileDiagnostics.get(fileName) || [];
             }
             var allDiagnostics = [];
             function pushDiagnostic(d) {
                 allDiagnostics.push(d);
             }
             ts.forEach(nonFileDiagnostics, pushDiagnostic);
-            for (var key in fileDiagnostics) {
-                ts.forEach(fileDiagnostics[key], pushDiagnostic);
-            }
+            fileDiagnostics.forEach(function (diagnostics) {
+                ts.forEach(diagnostics, pushDiagnostic);
+            });
             return ts.sortAndDeduplicateDiagnostics(allDiagnostics);
         }
         function sortAndDeduplicate() {
@@ -5642,9 +6236,9 @@ var ts;
             }
             diagnosticsModified = false;
             nonFileDiagnostics = ts.sortAndDeduplicateDiagnostics(nonFileDiagnostics);
-            for (var key in fileDiagnostics) {
-                fileDiagnostics[key] = ts.sortAndDeduplicateDiagnostics(fileDiagnostics[key]);
-            }
+            fileDiagnostics.forEach(function (diagnostics, key) {
+                fileDiagnostics.set(key, ts.sortAndDeduplicateDiagnostics(diagnostics));
+            });
         }
     }
     ts.createDiagnosticCollection = createDiagnosticCollection;
@@ -5654,7 +6248,7 @@ var ts;
     // the map below must be updated. Note that this regexp *does not* include the 'delete' character.
     // There is no reason for this other than that JSON.stringify does not handle it either.
     var escapedCharsRegExp = /[\\\"\u0000-\u001f\t\v\f\b\r\n\u2028\u2029\u0085]/g;
-    var escapedCharsMap = ts.createMap({
+    var escapedCharsMap = ts.createMapFromTemplate({
         "\0": "\\0",
         "\t": "\\t",
         "\v": "\\v",
@@ -5674,13 +6268,12 @@ var ts;
      * Note that this doesn't actually wrap the input in double quotes.
      */
     function escapeString(s) {
-        s = escapedCharsRegExp.test(s) ? s.replace(escapedCharsRegExp, getReplacement) : s;
-        return s;
-        function getReplacement(c) {
-            return escapedCharsMap[c] || get16BitUnicodeEscapeSequence(c.charCodeAt(0));
-        }
+        return s.replace(escapedCharsRegExp, getReplacement);
     }
     ts.escapeString = escapeString;
+    function getReplacement(c) {
+        return escapedCharsMap.get(c) || get16BitUnicodeEscapeSequence(c.charCodeAt(0));
+    }
     function isIntrinsicJsxName(name) {
         var ch = name.substr(0, 1);
         return ch.toLowerCase() === ch;
@@ -5692,14 +6285,15 @@ var ts;
         return "\\u" + paddedHexCode;
     }
     var nonAsciiCharacters = /[^\u0000-\u007F]/g;
-    function escapeNonAsciiCharacters(s) {
+    function escapeNonAsciiString(s) {
+        s = escapeString(s);
         // Replace non-ASCII characters with '\uNNNN' escapes if any exist.
         // Otherwise just return the original string.
         return nonAsciiCharacters.test(s) ?
             s.replace(nonAsciiCharacters, function (c) { return get16BitUnicodeEscapeSequence(c.charCodeAt(0)); }) :
             s;
     }
-    ts.escapeNonAsciiCharacters = escapeNonAsciiCharacters;
+    ts.escapeNonAsciiString = escapeNonAsciiString;
     var indentStrings = ["", "    "];
     function getIndentString(level) {
         if (indentStrings[level] === undefined) {
@@ -5788,7 +6382,7 @@ var ts;
     ts.getResolvedExternalModuleName = getResolvedExternalModuleName;
     function getExternalModuleNameFromDeclaration(host, resolver, declaration) {
         var file = resolver.getExternalModuleFileFromDeclaration(declaration);
-        if (!file || isDeclarationFile(file)) {
+        if (!file || file.isDeclarationFile) {
             return undefined;
         }
         return getResolvedExternalModuleName(host, file);
@@ -5823,7 +6417,7 @@ var ts;
         var path = outputDir
             ? getSourceFilePathInNewDir(sourceFile, host, outputDir)
             : sourceFile.fileName;
-        return ts.removeFileExtension(path) + ".d.ts";
+        return ts.removeFileExtension(path) + ".d.ts" /* Dts */;
     }
     ts.getDeclarationEmitOutputFilePath = getDeclarationEmitOutputFilePath;
     /**
@@ -5837,154 +6431,26 @@ var ts;
      */
     function getSourceFilesToEmit(host, targetSourceFile) {
         var options = host.getCompilerOptions();
+        var isSourceFileFromExternalLibrary = function (file) { return host.isSourceFileFromExternalLibrary(file); };
         if (options.outFile || options.out) {
             var moduleKind = ts.getEmitModuleKind(options);
-            var moduleEmitEnabled = moduleKind === ts.ModuleKind.AMD || moduleKind === ts.ModuleKind.System;
-            var sourceFiles = host.getSourceFiles();
+            var moduleEmitEnabled_1 = moduleKind === ts.ModuleKind.AMD || moduleKind === ts.ModuleKind.System;
             // Can emit only sources that are not declaration file and are either non module code or module with --module or --target es6 specified
-            return ts.filter(sourceFiles, moduleEmitEnabled ? isNonDeclarationFile : isBundleEmitNonExternalModule);
+            return ts.filter(host.getSourceFiles(), function (sourceFile) {
+                return (moduleEmitEnabled_1 || !ts.isExternalModule(sourceFile)) && sourceFileMayBeEmitted(sourceFile, options, isSourceFileFromExternalLibrary);
+            });
         }
         else {
             var sourceFiles = targetSourceFile === undefined ? host.getSourceFiles() : [targetSourceFile];
-            return ts.filter(sourceFiles, isNonDeclarationFile);
+            return ts.filter(sourceFiles, function (sourceFile) { return sourceFileMayBeEmitted(sourceFile, options, isSourceFileFromExternalLibrary); });
         }
     }
     ts.getSourceFilesToEmit = getSourceFilesToEmit;
-    function isNonDeclarationFile(sourceFile) {
-        return !isDeclarationFile(sourceFile);
-    }
-    function isBundleEmitNonExternalModule(sourceFile) {
-        return !isDeclarationFile(sourceFile) && !ts.isExternalModule(sourceFile);
-    }
-    /**
-     * Iterates over each source file to emit. The source files are expected to have been
-     * transformed for use by the pretty printer.
-     *
-     * Originally part of `forEachExpectedEmitFile`, this functionality was extracted to support
-     * transformations.
-     *
-     * @param host An EmitHost.
-     * @param sourceFiles The transformed source files to emit.
-     * @param action The action to execute.
-     */
-    function forEachTransformedEmitFile(host, sourceFiles, action, emitOnlyDtsFiles) {
-        var options = host.getCompilerOptions();
-        // Emit on each source file
-        if (options.outFile || options.out) {
-            onBundledEmit(host, sourceFiles);
-        }
-        else {
-            for (var _i = 0, sourceFiles_2 = sourceFiles; _i < sourceFiles_2.length; _i++) {
-                var sourceFile = sourceFiles_2[_i];
-                // Don't emit if source file is a declaration file, or was located under node_modules
-                if (!isDeclarationFile(sourceFile) && !host.isSourceFileFromExternalLibrary(sourceFile)) {
-                    onSingleFileEmit(host, sourceFile);
-                }
-            }
-        }
-        function onSingleFileEmit(host, sourceFile) {
-            // JavaScript files are always LanguageVariant.JSX, as JSX syntax is allowed in .js files also.
-            // So for JavaScript files, '.jsx' is only emitted if the input was '.jsx', and JsxEmit.Preserve.
-            // For TypeScript, the only time to emit with a '.jsx' extension, is on JSX input, and JsxEmit.Preserve
-            var extension = ".js";
-            if (options.jsx === 1 /* Preserve */) {
-                if (isSourceFileJavaScript(sourceFile)) {
-                    if (ts.fileExtensionIs(sourceFile.fileName, ".jsx")) {
-                        extension = ".jsx";
-                    }
-                }
-                else if (sourceFile.languageVariant === 1 /* JSX */) {
-                    // TypeScript source file preserving JSX syntax
-                    extension = ".jsx";
-                }
-            }
-            var jsFilePath = getOwnEmitOutputFilePath(sourceFile, host, extension);
-            var sourceMapFilePath = getSourceMapFilePath(jsFilePath, options);
-            var declarationFilePath = !isSourceFileJavaScript(sourceFile) && (options.declaration || emitOnlyDtsFiles) ? getDeclarationEmitOutputFilePath(sourceFile, host) : undefined;
-            action(jsFilePath, sourceMapFilePath, declarationFilePath, [sourceFile], /*isBundledEmit*/ false);
-        }
-        function onBundledEmit(host, sourceFiles) {
-            if (sourceFiles.length) {
-                var jsFilePath = options.outFile || options.out;
-                var sourceMapFilePath = getSourceMapFilePath(jsFilePath, options);
-                var declarationFilePath = options.declaration ? ts.removeFileExtension(jsFilePath) + ".d.ts" : undefined;
-                action(jsFilePath, sourceMapFilePath, declarationFilePath, sourceFiles, /*isBundledEmit*/ true);
-            }
-        }
-    }
-    ts.forEachTransformedEmitFile = forEachTransformedEmitFile;
-    function getSourceMapFilePath(jsFilePath, options) {
-        return options.sourceMap ? jsFilePath + ".map" : undefined;
-    }
-    /**
-     * Iterates over the source files that are expected to have an emit output. This function
-     * is used by the legacy emitter and the declaration emitter and should not be used by
-     * the tree transforming emitter.
-     *
-     * @param host An EmitHost.
-     * @param action The action to execute.
-     * @param targetSourceFile An optional target source file to emit.
-     */
-    function forEachExpectedEmitFile(host, action, targetSourceFile, emitOnlyDtsFiles) {
-        var options = host.getCompilerOptions();
-        // Emit on each source file
-        if (options.outFile || options.out) {
-            onBundledEmit(host);
-        }
-        else {
-            var sourceFiles = targetSourceFile === undefined ? host.getSourceFiles() : [targetSourceFile];
-            for (var _i = 0, sourceFiles_3 = sourceFiles; _i < sourceFiles_3.length; _i++) {
-                var sourceFile = sourceFiles_3[_i];
-                // Don't emit if source file is a declaration file, or was located under node_modules
-                if (!isDeclarationFile(sourceFile) && !host.isSourceFileFromExternalLibrary(sourceFile)) {
-                    onSingleFileEmit(host, sourceFile);
-                }
-            }
-        }
-        function onSingleFileEmit(host, sourceFile) {
-            // JavaScript files are always LanguageVariant.JSX, as JSX syntax is allowed in .js files also.
-            // So for JavaScript files, '.jsx' is only emitted if the input was '.jsx', and JsxEmit.Preserve.
-            // For TypeScript, the only time to emit with a '.jsx' extension, is on JSX input, and JsxEmit.Preserve
-            var extension = ".js";
-            if (options.jsx === 1 /* Preserve */) {
-                if (isSourceFileJavaScript(sourceFile)) {
-                    if (ts.fileExtensionIs(sourceFile.fileName, ".jsx")) {
-                        extension = ".jsx";
-                    }
-                }
-                else if (sourceFile.languageVariant === 1 /* JSX */) {
-                    // TypeScript source file preserving JSX syntax
-                    extension = ".jsx";
-                }
-            }
-            var jsFilePath = getOwnEmitOutputFilePath(sourceFile, host, extension);
-            var declarationFilePath = !isSourceFileJavaScript(sourceFile) && (emitOnlyDtsFiles || options.declaration) ? getDeclarationEmitOutputFilePath(sourceFile, host) : undefined;
-            var emitFileNames = {
-                jsFilePath: jsFilePath,
-                sourceMapFilePath: getSourceMapFilePath(jsFilePath, options),
-                declarationFilePath: declarationFilePath
-            };
-            action(emitFileNames, [sourceFile], /*isBundledEmit*/ false, emitOnlyDtsFiles);
-        }
-        function onBundledEmit(host) {
-            // Can emit only sources that are not declaration file and are either non module code or module with
-            // --module or --target es6 specified. Files included by searching under node_modules are also not emitted.
-            var bundledSources = ts.filter(host.getSourceFiles(), function (sourceFile) { return !isDeclarationFile(sourceFile) &&
-                !host.isSourceFileFromExternalLibrary(sourceFile) &&
-                (!ts.isExternalModule(sourceFile) ||
-                    !!ts.getEmitModuleKind(options)); });
-            if (bundledSources.length) {
-                var jsFilePath = options.outFile || options.out;
-                var emitFileNames = {
-                    jsFilePath: jsFilePath,
-                    sourceMapFilePath: getSourceMapFilePath(jsFilePath, options),
-                    declarationFilePath: options.declaration ? ts.removeFileExtension(jsFilePath) + ".d.ts" : undefined
-                };
-                action(emitFileNames, bundledSources, /*isBundledEmit*/ true, emitOnlyDtsFiles);
-            }
-        }
+    /** Don't call this for `--outFile`, just for `--outDir` or plain emit. `--outFile` needs additional checks. */
+    function sourceFileMayBeEmitted(sourceFile, options, isSourceFileFromExternalLibrary) {
+        return !(options.noEmitForJsFiles && isSourceFileJavaScript(sourceFile)) && !sourceFile.isDeclarationFile && !isSourceFileFromExternalLibrary(sourceFile);
     }
-    ts.forEachExpectedEmitFile = forEachExpectedEmitFile;
+    ts.sourceFileMayBeEmitted = sourceFileMayBeEmitted;
     function getSourceFilePathInNewDir(sourceFile, host, newDirPath) {
         var sourceFilePath = ts.getNormalizedAbsolutePath(sourceFile.fileName, host.getCurrentDirectory());
         var commonSourceDirectory = host.getCommonSourceDirectory();
@@ -6009,21 +6475,45 @@ var ts;
     ts.getLineOfLocalPositionFromLineMap = getLineOfLocalPositionFromLineMap;
     function getFirstConstructorWithBody(node) {
         return ts.forEach(node.members, function (member) {
-            if (member.kind === 148 /* Constructor */ && nodeIsPresent(member.body)) {
+            if (member.kind === 152 /* Constructor */ && nodeIsPresent(member.body)) {
                 return member;
             }
         });
     }
     ts.getFirstConstructorWithBody = getFirstConstructorWithBody;
-    function getSetAccessorTypeAnnotationNode(accessor) {
+    function getSetAccessorValueParameter(accessor) {
         if (accessor && accessor.parameters.length > 0) {
-            var hasThis = accessor.parameters.length === 2 &&
-                accessor.parameters[0].name.kind === 69 /* Identifier */ &&
-                accessor.parameters[0].name.originalKeywordKind === 97 /* ThisKeyword */;
-            return accessor.parameters[hasThis ? 1 : 0].type;
+            var hasThis = accessor.parameters.length === 2 && parameterIsThisKeyword(accessor.parameters[0]);
+            return accessor.parameters[hasThis ? 1 : 0];
         }
     }
+    /** Get the type annotation for the value parameter. */
+    function getSetAccessorTypeAnnotationNode(accessor) {
+        var parameter = getSetAccessorValueParameter(accessor);
+        return parameter && parameter.type;
+    }
     ts.getSetAccessorTypeAnnotationNode = getSetAccessorTypeAnnotationNode;
+    function getThisParameter(signature) {
+        if (signature.parameters.length) {
+            var thisParameter = signature.parameters[0];
+            if (parameterIsThisKeyword(thisParameter)) {
+                return thisParameter;
+            }
+        }
+    }
+    ts.getThisParameter = getThisParameter;
+    function parameterIsThisKeyword(parameter) {
+        return isThisIdentifier(parameter.name);
+    }
+    ts.parameterIsThisKeyword = parameterIsThisKeyword;
+    function isThisIdentifier(node) {
+        return node && node.kind === 71 /* Identifier */ && identifierIsThisKeyword(node);
+    }
+    ts.isThisIdentifier = isThisIdentifier;
+    function identifierIsThisKeyword(id) {
+        return id.originalKeywordKind === 99 /* ThisKeyword */;
+    }
+    ts.identifierIsThisKeyword = identifierIsThisKeyword;
     function getAllAccessorDeclarations(declarations, accessor) {
         var firstAccessor;
         var secondAccessor;
@@ -6031,10 +6521,10 @@ var ts;
         var setAccessor;
         if (hasDynamicName(accessor)) {
             firstAccessor = accessor;
-            if (accessor.kind === 149 /* GetAccessor */) {
+            if (accessor.kind === 153 /* GetAccessor */) {
                 getAccessor = accessor;
             }
-            else if (accessor.kind === 150 /* SetAccessor */) {
+            else if (accessor.kind === 154 /* SetAccessor */) {
                 setAccessor = accessor;
             }
             else {
@@ -6043,7 +6533,7 @@ var ts;
         }
         else {
             ts.forEach(declarations, function (member) {
-                if ((member.kind === 149 /* GetAccessor */ || member.kind === 150 /* SetAccessor */)
+                if ((member.kind === 153 /* GetAccessor */ || member.kind === 154 /* SetAccessor */)
                     && hasModifier(member, 32 /* Static */) === hasModifier(accessor, 32 /* Static */)) {
                     var memberName = getPropertyNameForPropertyNameNode(member.name);
                     var accessorName = getPropertyNameForPropertyNameNode(accessor.name);
@@ -6054,10 +6544,10 @@ var ts;
                         else if (!secondAccessor) {
                             secondAccessor = member;
                         }
-                        if (member.kind === 149 /* GetAccessor */ && !getAccessor) {
+                        if (member.kind === 153 /* GetAccessor */ && !getAccessor) {
                             getAccessor = member;
                         }
-                        if (member.kind === 150 /* SetAccessor */ && !setAccessor) {
+                        if (member.kind === 154 /* SetAccessor */ && !setAccessor) {
                             setAccessor = member;
                         }
                     }
@@ -6072,6 +6562,55 @@ var ts;
         };
     }
     ts.getAllAccessorDeclarations = getAllAccessorDeclarations;
+    /**
+     * Gets the effective type annotation of a variable, parameter, or property. If the node was
+     * parsed in a JavaScript file, gets the type annotation from JSDoc.
+     */
+    function getEffectiveTypeAnnotationNode(node) {
+        if (node.type) {
+            return node.type;
+        }
+        if (node.flags & 65536 /* JavaScriptFile */) {
+            return getJSDocType(node);
+        }
+    }
+    ts.getEffectiveTypeAnnotationNode = getEffectiveTypeAnnotationNode;
+    /**
+     * Gets the effective return type annotation of a signature. If the node was parsed in a
+     * JavaScript file, gets the return type annotation from JSDoc.
+     */
+    function getEffectiveReturnTypeNode(node) {
+        if (node.type) {
+            return node.type;
+        }
+        if (node.flags & 65536 /* JavaScriptFile */) {
+            return getJSDocReturnType(node);
+        }
+    }
+    ts.getEffectiveReturnTypeNode = getEffectiveReturnTypeNode;
+    /**
+     * Gets the effective type parameters. If the node was parsed in a
+     * JavaScript file, gets the type parameters from the `@template` tag from JSDoc.
+     */
+    function getEffectiveTypeParameterDeclarations(node) {
+        if (node.typeParameters) {
+            return node.typeParameters;
+        }
+        if (node.flags & 65536 /* JavaScriptFile */) {
+            var templateTag = getJSDocTemplateTag(node);
+            return templateTag && templateTag.typeParameters;
+        }
+    }
+    ts.getEffectiveTypeParameterDeclarations = getEffectiveTypeParameterDeclarations;
+    /**
+     * Gets the effective type annotation of the value parameter of a set accessor. If the node
+     * was parsed in a JavaScript file, gets the type annotation from JSDoc.
+     */
+    function getEffectiveSetAccessorTypeAnnotationNode(node) {
+        var parameter = getSetAccessorValueParameter(node);
+        return parameter && getEffectiveTypeAnnotationNode(parameter);
+    }
+    ts.getEffectiveSetAccessorTypeAnnotationNode = getEffectiveSetAccessorTypeAnnotationNode;
     function emitNewLineBeforeLeadingComments(lineMap, writer, node, leadingComments) {
         emitNewLineBeforeLeadingCommentsOfPosition(lineMap, writer, node.pos, leadingComments);
     }
@@ -6277,6 +6816,13 @@ var ts;
         if (node.modifierFlagsCache & 536870912 /* HasComputedFlags */) {
             return node.modifierFlagsCache & ~536870912 /* HasComputedFlags */;
         }
+        var flags = getModifierFlagsNoCache(node);
+        node.modifierFlagsCache = flags | 536870912 /* HasComputedFlags */;
+        return flags;
+    }
+    ts.getModifierFlags = getModifierFlags;
+    /* @internal */
+    function getModifierFlagsNoCache(node) {
         var flags = 0 /* None */;
         if (node.modifiers) {
             for (var _i = 0, _a = node.modifiers; _i < _a.length; _i++) {
@@ -6284,56 +6830,61 @@ var ts;
                 flags |= modifierToFlag(modifier.kind);
             }
         }
-        if (node.flags & 4 /* NestedNamespace */) {
+        if (node.flags & 4 /* NestedNamespace */ || (node.kind === 71 /* Identifier */ && node.isInJSDocNamespace)) {
             flags |= 1 /* Export */;
         }
-        node.modifierFlagsCache = flags | 536870912 /* HasComputedFlags */;
         return flags;
     }
-    ts.getModifierFlags = getModifierFlags;
+    ts.getModifierFlagsNoCache = getModifierFlagsNoCache;
     function modifierToFlag(token) {
         switch (token) {
-            case 113 /* StaticKeyword */: return 32 /* Static */;
-            case 112 /* PublicKeyword */: return 4 /* Public */;
-            case 111 /* ProtectedKeyword */: return 16 /* Protected */;
-            case 110 /* PrivateKeyword */: return 8 /* Private */;
-            case 115 /* AbstractKeyword */: return 128 /* Abstract */;
-            case 82 /* ExportKeyword */: return 1 /* Export */;
-            case 122 /* DeclareKeyword */: return 2 /* Ambient */;
-            case 74 /* ConstKeyword */: return 2048 /* Const */;
-            case 77 /* DefaultKeyword */: return 512 /* Default */;
-            case 118 /* AsyncKeyword */: return 256 /* Async */;
-            case 128 /* ReadonlyKeyword */: return 64 /* Readonly */;
+            case 115 /* StaticKeyword */: return 32 /* Static */;
+            case 114 /* PublicKeyword */: return 4 /* Public */;
+            case 113 /* ProtectedKeyword */: return 16 /* Protected */;
+            case 112 /* PrivateKeyword */: return 8 /* Private */;
+            case 117 /* AbstractKeyword */: return 128 /* Abstract */;
+            case 84 /* ExportKeyword */: return 1 /* Export */;
+            case 124 /* DeclareKeyword */: return 2 /* Ambient */;
+            case 76 /* ConstKeyword */: return 2048 /* Const */;
+            case 79 /* DefaultKeyword */: return 512 /* Default */;
+            case 120 /* AsyncKeyword */: return 256 /* Async */;
+            case 131 /* ReadonlyKeyword */: return 64 /* Readonly */;
         }
         return 0 /* None */;
     }
     ts.modifierToFlag = modifierToFlag;
     function isLogicalOperator(token) {
-        return token === 52 /* BarBarToken */
-            || token === 51 /* AmpersandAmpersandToken */
-            || token === 49 /* ExclamationToken */;
+        return token === 54 /* BarBarToken */
+            || token === 53 /* AmpersandAmpersandToken */
+            || token === 51 /* ExclamationToken */;
     }
     ts.isLogicalOperator = isLogicalOperator;
     function isAssignmentOperator(token) {
-        return token >= 56 /* FirstAssignment */ && token <= 68 /* LastAssignment */;
+        return token >= 58 /* FirstAssignment */ && token <= 70 /* LastAssignment */;
     }
     ts.isAssignmentOperator = isAssignmentOperator;
     /** Get `C` given `N` if `N` is in the position `class C extends N` where `N` is an ExpressionWithTypeArguments. */
     function tryGetClassExtendingExpressionWithTypeArguments(node) {
-        if (node.kind === 194 /* ExpressionWithTypeArguments */ &&
-            node.parent.token === 83 /* ExtendsKeyword */ &&
-            isClassLike(node.parent.parent)) {
+        if (node.kind === 201 /* ExpressionWithTypeArguments */ &&
+            node.parent.token === 85 /* ExtendsKeyword */ &&
+            ts.isClassLike(node.parent.parent)) {
             return node.parent.parent;
         }
     }
     ts.tryGetClassExtendingExpressionWithTypeArguments = tryGetClassExtendingExpressionWithTypeArguments;
+    function isAssignmentExpression(node, excludeCompoundAssignment) {
+        return ts.isBinaryExpression(node)
+            && (excludeCompoundAssignment
+                ? node.operatorToken.kind === 58 /* EqualsToken */
+                : isAssignmentOperator(node.operatorToken.kind))
+            && ts.isLeftHandSideExpression(node.left);
+    }
+    ts.isAssignmentExpression = isAssignmentExpression;
     function isDestructuringAssignment(node) {
-        if (isBinaryExpression(node)) {
-            if (node.operatorToken.kind === 56 /* EqualsToken */) {
-                var kind = node.left.kind;
-                return kind === 171 /* ObjectLiteralExpression */
-                    || kind === 170 /* ArrayLiteralExpression */;
-            }
+        if (isAssignmentExpression(node, /*excludeCompoundAssignment*/ true)) {
+            var kind = node.left.kind;
+            return kind === 178 /* ObjectLiteralExpression */
+                || kind === 177 /* ArrayLiteralExpression */;
         }
         return false;
     }
@@ -6345,10 +6896,10 @@ var ts;
     }
     ts.isSupportedExpressionWithTypeArguments = isSupportedExpressionWithTypeArguments;
     function isSupportedExpressionWithTypeArgumentsRest(node) {
-        if (node.kind === 69 /* Identifier */) {
+        if (node.kind === 71 /* Identifier */) {
             return true;
         }
-        else if (isPropertyAccessExpression(node)) {
+        else if (ts.isPropertyAccessExpression(node)) {
             return isSupportedExpressionWithTypeArgumentsRest(node.expression);
         }
         else {
@@ -6359,31 +6910,42 @@ var ts;
         return tryGetClassExtendingExpressionWithTypeArguments(node) !== undefined;
     }
     ts.isExpressionWithTypeArgumentsInClassExtendsClause = isExpressionWithTypeArgumentsInClassExtendsClause;
+    function isExpressionWithTypeArgumentsInClassImplementsClause(node) {
+        return node.kind === 201 /* ExpressionWithTypeArguments */
+            && isEntityNameExpression(node.expression)
+            && node.parent
+            && node.parent.token === 108 /* ImplementsKeyword */
+            && node.parent.parent
+            && ts.isClassLike(node.parent.parent);
+    }
+    ts.isExpressionWithTypeArgumentsInClassImplementsClause = isExpressionWithTypeArgumentsInClassImplementsClause;
     function isEntityNameExpression(node) {
-        return node.kind === 69 /* Identifier */ ||
-            node.kind === 172 /* PropertyAccessExpression */ && isEntityNameExpression(node.expression);
+        return node.kind === 71 /* Identifier */ ||
+            node.kind === 179 /* PropertyAccessExpression */ && isEntityNameExpression(node.expression);
     }
     ts.isEntityNameExpression = isEntityNameExpression;
     function isRightSideOfQualifiedNameOrPropertyAccess(node) {
-        return (node.parent.kind === 139 /* QualifiedName */ && node.parent.right === node) ||
-            (node.parent.kind === 172 /* PropertyAccessExpression */ && node.parent.name === node);
+        return (node.parent.kind === 143 /* QualifiedName */ && node.parent.right === node) ||
+            (node.parent.kind === 179 /* PropertyAccessExpression */ && node.parent.name === node);
     }
     ts.isRightSideOfQualifiedNameOrPropertyAccess = isRightSideOfQualifiedNameOrPropertyAccess;
-    function isEmptyObjectLiteralOrArrayLiteral(expression) {
-        var kind = expression.kind;
-        if (kind === 171 /* ObjectLiteralExpression */) {
-            return expression.properties.length === 0;
-        }
-        if (kind === 170 /* ArrayLiteralExpression */) {
-            return expression.elements.length === 0;
-        }
-        return false;
+    function isEmptyObjectLiteral(expression) {
+        return expression.kind === 178 /* ObjectLiteralExpression */ &&
+            expression.properties.length === 0;
     }
-    ts.isEmptyObjectLiteralOrArrayLiteral = isEmptyObjectLiteralOrArrayLiteral;
+    ts.isEmptyObjectLiteral = isEmptyObjectLiteral;
+    function isEmptyArrayLiteral(expression) {
+        return expression.kind === 177 /* ArrayLiteralExpression */ &&
+            expression.elements.length === 0;
+    }
+    ts.isEmptyArrayLiteral = isEmptyArrayLiteral;
     function getLocalSymbolForExportDefault(symbol) {
-        return symbol && symbol.valueDeclaration && hasModifier(symbol.valueDeclaration, 512 /* Default */) ? symbol.valueDeclaration.localSymbol : undefined;
+        return isExportDefaultSymbol(symbol) ? symbol.declarations[0].localSymbol : undefined;
     }
     ts.getLocalSymbolForExportDefault = getLocalSymbolForExportDefault;
+    function isExportDefaultSymbol(symbol) {
+        return symbol && ts.length(symbol.declarations) > 0 && hasModifier(symbol.declarations[0], 512 /* Default */);
+    }
     /** Return ".ts", ".d.ts", or ".tsx", if that is the extension. */
     function tryExtractTypeScriptExtension(fileName) {
         return ts.find(ts.supportedTypescriptExtensionsForExtractExtension, function (extension) { return ts.fileExtensionIs(fileName, extension); });
@@ -6423,47 +6985,6 @@ var ts;
         }
         return output;
     }
-    /**
-     * Serialize an object graph into a JSON string. This is intended only for use on an acyclic graph
-     * as the fallback implementation does not check for circular references by default.
-     */
-    ts.stringify = typeof JSON !== "undefined" && JSON.stringify
-        ? JSON.stringify
-        : stringifyFallback;
-    /**
-     * Serialize an object graph into a JSON string.
-     */
-    function stringifyFallback(value) {
-        // JSON.stringify returns `undefined` here, instead of the string "undefined".
-        return value === undefined ? undefined : stringifyValue(value);
-    }
-    function stringifyValue(value) {
-        return typeof value === "string" ? "\"" + escapeString(value) + "\""
-            : typeof value === "number" ? isFinite(value) ? String(value) : "null"
-                : typeof value === "boolean" ? value ? "true" : "false"
-                    : typeof value === "object" && value ? ts.isArray(value) ? cycleCheck(stringifyArray, value) : cycleCheck(stringifyObject, value)
-                        : "null";
-    }
-    function cycleCheck(cb, value) {
-        ts.Debug.assert(!value.hasOwnProperty("__cycle"), "Converting circular structure to JSON");
-        value.__cycle = true;
-        var result = cb(value);
-        delete value.__cycle;
-        return result;
-    }
-    function stringifyArray(value) {
-        return "[" + ts.reduceLeft(value, stringifyElement, "") + "]";
-    }
-    function stringifyElement(memo, value) {
-        return (memo ? memo + "," : memo) + stringifyValue(value);
-    }
-    function stringifyObject(value) {
-        return "{" + ts.reduceOwnProperties(value, stringifyProperty, "") + "}";
-    }
-    function stringifyProperty(memo, value, key) {
-        return value === undefined || typeof value === "function" || key === "__cycle" ? memo
-            : (memo ? memo + "," : memo) + ("\"" + escapeString(key) + "\":" + stringifyValue(value));
-    }
     var base64Digits = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
     /**
      * Converts a string to a base-64 encoded ASCII string.
@@ -6499,13 +7020,13 @@ var ts;
     var carriageReturnLineFeed = "\r\n";
     var lineFeed = "\n";
     function getNewLineCharacter(options) {
-        if (options.newLine === 0 /* CarriageReturnLineFeed */) {
-            return carriageReturnLineFeed;
-        }
-        else if (options.newLine === 1 /* LineFeed */) {
-            return lineFeed;
+        switch (options.newLine) {
+            case 0 /* CarriageReturnLineFeed */:
+                return carriageReturnLineFeed;
+            case 1 /* LineFeed */:
+                return lineFeed;
         }
-        else if (ts.sys) {
+        if (ts.sys) {
             return ts.sys.newLine;
         }
         return carriageReturnLineFeed;
@@ -6526,49 +7047,49 @@ var ts;
             var kind = node.kind;
             if (kind === 9 /* StringLiteral */
                 || kind === 8 /* NumericLiteral */
-                || kind === 10 /* RegularExpressionLiteral */
-                || kind === 11 /* NoSubstitutionTemplateLiteral */
-                || kind === 69 /* Identifier */
-                || kind === 97 /* ThisKeyword */
-                || kind === 95 /* SuperKeyword */
-                || kind === 99 /* TrueKeyword */
-                || kind === 84 /* FalseKeyword */
-                || kind === 93 /* NullKeyword */) {
+                || kind === 12 /* RegularExpressionLiteral */
+                || kind === 13 /* NoSubstitutionTemplateLiteral */
+                || kind === 71 /* Identifier */
+                || kind === 99 /* ThisKeyword */
+                || kind === 97 /* SuperKeyword */
+                || kind === 101 /* TrueKeyword */
+                || kind === 86 /* FalseKeyword */
+                || kind === 95 /* NullKeyword */) {
                 return true;
             }
-            else if (kind === 172 /* PropertyAccessExpression */) {
+            else if (kind === 179 /* PropertyAccessExpression */) {
                 return isSimpleExpressionWorker(node.expression, depth + 1);
             }
-            else if (kind === 173 /* ElementAccessExpression */) {
+            else if (kind === 180 /* ElementAccessExpression */) {
                 return isSimpleExpressionWorker(node.expression, depth + 1)
                     && isSimpleExpressionWorker(node.argumentExpression, depth + 1);
             }
-            else if (kind === 185 /* PrefixUnaryExpression */
-                || kind === 186 /* PostfixUnaryExpression */) {
+            else if (kind === 192 /* PrefixUnaryExpression */
+                || kind === 193 /* PostfixUnaryExpression */) {
                 return isSimpleExpressionWorker(node.operand, depth + 1);
             }
-            else if (kind === 187 /* BinaryExpression */) {
-                return node.operatorToken.kind !== 38 /* AsteriskAsteriskToken */
+            else if (kind === 194 /* BinaryExpression */) {
+                return node.operatorToken.kind !== 40 /* AsteriskAsteriskToken */
                     && isSimpleExpressionWorker(node.left, depth + 1)
                     && isSimpleExpressionWorker(node.right, depth + 1);
             }
-            else if (kind === 188 /* ConditionalExpression */) {
+            else if (kind === 195 /* ConditionalExpression */) {
                 return isSimpleExpressionWorker(node.condition, depth + 1)
                     && isSimpleExpressionWorker(node.whenTrue, depth + 1)
                     && isSimpleExpressionWorker(node.whenFalse, depth + 1);
             }
-            else if (kind === 183 /* VoidExpression */
-                || kind === 182 /* TypeOfExpression */
-                || kind === 181 /* DeleteExpression */) {
+            else if (kind === 190 /* VoidExpression */
+                || kind === 189 /* TypeOfExpression */
+                || kind === 188 /* DeleteExpression */) {
                 return isSimpleExpressionWorker(node.expression, depth + 1);
             }
-            else if (kind === 170 /* ArrayLiteralExpression */) {
+            else if (kind === 177 /* ArrayLiteralExpression */) {
                 return node.elements.length === 0;
             }
-            else if (kind === 171 /* ObjectLiteralExpression */) {
+            else if (kind === 178 /* ObjectLiteralExpression */) {
                 return node.properties.length === 0;
             }
-            else if (kind === 174 /* CallExpression */) {
+            else if (kind === 181 /* CallExpression */) {
                 if (!isSimpleExpressionWorker(node.expression, depth + 1)) {
                     return false;
                 }
@@ -6583,24 +7104,85 @@ var ts;
         }
         return false;
     }
-    var syntaxKindCache = ts.createMap();
-    function formatSyntaxKind(kind) {
-        var syntaxKindEnum = ts.SyntaxKind;
-        if (syntaxKindEnum) {
-            if (syntaxKindCache[kind]) {
-                return syntaxKindCache[kind];
-            }
-            for (var name_6 in syntaxKindEnum) {
-                if (syntaxKindEnum[name_6] === kind) {
-                    return syntaxKindCache[kind] = kind.toString() + " (" + name_6 + ")";
+    /**
+     * Formats an enum value as a string for debugging and debug assertions.
+     */
+    function formatEnum(value, enumObject, isFlags) {
+        if (value === void 0) { value = 0; }
+        var members = getEnumMembers(enumObject);
+        if (value === 0) {
+            return members.length > 0 && members[0][0] === 0 ? members[0][1] : "0";
+        }
+        if (isFlags) {
+            var result = "";
+            var remainingFlags = value;
+            for (var i = members.length - 1; i >= 0 && remainingFlags !== 0; i--) {
+                var _a = members[i], enumValue = _a[0], enumName = _a[1];
+                if (enumValue !== 0 && (remainingFlags & enumValue) === enumValue) {
+                    remainingFlags &= ~enumValue;
+                    result = "" + enumName + (result ? ", " : "") + result;
                 }
             }
+            if (remainingFlags === 0) {
+                return result;
+            }
         }
         else {
-            return kind.toString();
+            for (var _i = 0, members_1 = members; _i < members_1.length; _i++) {
+                var _b = members_1[_i], enumValue = _b[0], enumName = _b[1];
+                if (enumValue === value) {
+                    return enumName;
+                }
+            }
         }
+        return value.toString();
+    }
+    function getEnumMembers(enumObject) {
+        var result = [];
+        for (var name_6 in enumObject) {
+            var value = enumObject[name_6];
+            if (typeof value === "number") {
+                result.push([value, name_6]);
+            }
+        }
+        return ts.stableSort(result, function (x, y) { return ts.compareValues(x[0], y[0]); });
+    }
+    function formatSyntaxKind(kind) {
+        return formatEnum(kind, ts.SyntaxKind, /*isFlags*/ false);
     }
     ts.formatSyntaxKind = formatSyntaxKind;
+    function formatModifierFlags(flags) {
+        return formatEnum(flags, ts.ModifierFlags, /*isFlags*/ true);
+    }
+    ts.formatModifierFlags = formatModifierFlags;
+    function formatTransformFlags(flags) {
+        return formatEnum(flags, ts.TransformFlags, /*isFlags*/ true);
+    }
+    ts.formatTransformFlags = formatTransformFlags;
+    function formatEmitFlags(flags) {
+        return formatEnum(flags, ts.EmitFlags, /*isFlags*/ true);
+    }
+    ts.formatEmitFlags = formatEmitFlags;
+    function formatSymbolFlags(flags) {
+        return formatEnum(flags, ts.SymbolFlags, /*isFlags*/ true);
+    }
+    ts.formatSymbolFlags = formatSymbolFlags;
+    function formatTypeFlags(flags) {
+        return formatEnum(flags, ts.TypeFlags, /*isFlags*/ true);
+    }
+    ts.formatTypeFlags = formatTypeFlags;
+    function formatObjectFlags(flags) {
+        return formatEnum(flags, ts.ObjectFlags, /*isFlags*/ true);
+    }
+    ts.formatObjectFlags = formatObjectFlags;
+    function getRangePos(range) {
+        return range ? range.pos : -1;
+    }
+    ts.getRangePos = getRangePos;
+    function getRangeEnd(range) {
+        return range ? range.end : -1;
+    }
+    ts.getRangeEnd = getRangeEnd;
     /**
      * Increases (or decreases) a position by the provided amount.
      *
@@ -6727,64 +7309,22 @@ var ts;
         return ts.positionIsSynthesized(range.pos) ? -1 : ts.skipTrivia(sourceFile.text, range.pos);
     }
     ts.getStartPositionOfRange = getStartPositionOfRange;
-    function collectExternalModuleInfo(sourceFile, resolver) {
-        var externalImports = [];
-        var exportSpecifiers = ts.createMap();
-        var exportEquals = undefined;
-        var hasExportStarsToExportValues = false;
-        for (var _i = 0, _a = sourceFile.statements; _i < _a.length; _i++) {
-            var node = _a[_i];
-            switch (node.kind) {
-                case 230 /* ImportDeclaration */:
-                    if (!node.importClause ||
-                        resolver.isReferencedAliasDeclaration(node.importClause, /*checkChildren*/ true)) {
-                        // import "mod"
-                        // import x from "mod" where x is referenced
-                        // import * as x from "mod" where x is referenced
-                        // import { x, y } from "mod" where at least one import is referenced
-                        externalImports.push(node);
-                    }
-                    break;
-                case 229 /* ImportEqualsDeclaration */:
-                    if (node.moduleReference.kind === 240 /* ExternalModuleReference */ && resolver.isReferencedAliasDeclaration(node)) {
-                        // import x = require("mod") where x is referenced
-                        externalImports.push(node);
-                    }
-                    break;
-                case 236 /* ExportDeclaration */:
-                    if (node.moduleSpecifier) {
-                        if (!node.exportClause) {
-                            // export * from "mod"
-                            if (resolver.moduleExportsSomeValue(node.moduleSpecifier)) {
-                                externalImports.push(node);
-                                hasExportStarsToExportValues = true;
-                            }
-                        }
-                        else if (resolver.isValueAliasDeclaration(node)) {
-                            // export { x, y } from "mod" where at least one export is a value symbol
-                            externalImports.push(node);
-                        }
-                    }
-                    else {
-                        // export { x, y }
-                        for (var _b = 0, _c = node.exportClause.elements; _b < _c.length; _b++) {
-                            var specifier = _c[_b];
-                            var name_7 = (specifier.propertyName || specifier.name).text;
-                            (exportSpecifiers[name_7] || (exportSpecifiers[name_7] = [])).push(specifier);
-                        }
-                    }
-                    break;
-                case 235 /* ExportAssignment */:
-                    if (node.isExportEquals && !exportEquals) {
-                        // export = x
-                        exportEquals = node;
-                    }
-                    break;
+    /**
+     * Determines whether a name was originally the declaration name of an enum or namespace
+     * declaration.
+     */
+    function isDeclarationNameOfEnumOrNamespace(node) {
+        var parseNode = ts.getParseTreeNode(node);
+        if (parseNode) {
+            switch (parseNode.parent.kind) {
+                case 232 /* EnumDeclaration */:
+                case 233 /* ModuleDeclaration */:
+                    return parseNode === parseNode.parent.name;
             }
         }
-        return { externalImports: externalImports, exportSpecifiers: exportSpecifiers, exportEquals: exportEquals, hasExportStarsToExportValues: hasExportStarsToExportValues };
+        return false;
     }
-    ts.collectExternalModuleInfo = collectExternalModuleInfo;
+    ts.isDeclarationNameOfEnumOrNamespace = isDeclarationNameOfEnumOrNamespace;
     function getInitializedVariables(node) {
         return ts.filter(node.declarations, isInitializedVariable);
     }
@@ -6799,7 +7339,7 @@ var ts;
         if (node.symbol) {
             for (var _i = 0, _a = node.symbol.declarations; _i < _a.length; _i++) {
                 var declaration = _a[_i];
-                if (declaration.kind === 221 /* ClassDeclaration */ && declaration !== node) {
+                if (declaration.kind === 229 /* ClassDeclaration */ && declaration !== node) {
                     return true;
                 }
             }
@@ -6817,551 +7357,69 @@ var ts;
         return node.symbol && getDeclarationOfKind(node.symbol, kind) === node;
     }
     ts.isFirstDeclarationOfKind = isFirstDeclarationOfKind;
-    // Node tests
-    //
-    // All node tests in the following list should *not* reference parent pointers so that
-    // they may be used with transformations.
-    // Node Arrays
-    function isNodeArray(array) {
-        return array.hasOwnProperty("pos")
-            && array.hasOwnProperty("end");
-    }
-    ts.isNodeArray = isNodeArray;
-    // Literals
-    function isNoSubstitutionTemplateLiteral(node) {
-        return node.kind === 11 /* NoSubstitutionTemplateLiteral */;
-    }
-    ts.isNoSubstitutionTemplateLiteral = isNoSubstitutionTemplateLiteral;
-    function isLiteralKind(kind) {
-        return 8 /* FirstLiteralToken */ <= kind && kind <= 11 /* LastLiteralToken */;
-    }
-    ts.isLiteralKind = isLiteralKind;
-    function isTextualLiteralKind(kind) {
-        return kind === 9 /* StringLiteral */ || kind === 11 /* NoSubstitutionTemplateLiteral */;
-    }
-    ts.isTextualLiteralKind = isTextualLiteralKind;
-    function isLiteralExpression(node) {
-        return isLiteralKind(node.kind);
-    }
-    ts.isLiteralExpression = isLiteralExpression;
-    // Pseudo-literals
-    function isTemplateLiteralKind(kind) {
-        return 11 /* FirstTemplateToken */ <= kind && kind <= 14 /* LastTemplateToken */;
-    }
-    ts.isTemplateLiteralKind = isTemplateLiteralKind;
-    function isTemplateLiteralFragmentKind(kind) {
-        return kind === 12 /* TemplateHead */
-            || kind === 13 /* TemplateMiddle */
-            || kind === 14 /* TemplateTail */;
-    }
-    function isTemplateLiteralFragment(node) {
-        return isTemplateLiteralFragmentKind(node.kind);
-    }
-    ts.isTemplateLiteralFragment = isTemplateLiteralFragment;
-    // Identifiers
-    function isIdentifier(node) {
-        return node.kind === 69 /* Identifier */;
-    }
-    ts.isIdentifier = isIdentifier;
-    function isGeneratedIdentifier(node) {
-        // Using `>` here catches both `GeneratedIdentifierKind.None` and `undefined`.
-        return isIdentifier(node) && node.autoGenerateKind > 0 /* None */;
-    }
-    ts.isGeneratedIdentifier = isGeneratedIdentifier;
-    // Keywords
-    function isModifier(node) {
-        return isModifierKind(node.kind);
-    }
-    ts.isModifier = isModifier;
-    // Names
-    function isQualifiedName(node) {
-        return node.kind === 139 /* QualifiedName */;
-    }
-    ts.isQualifiedName = isQualifiedName;
-    function isComputedPropertyName(node) {
-        return node.kind === 140 /* ComputedPropertyName */;
-    }
-    ts.isComputedPropertyName = isComputedPropertyName;
-    function isEntityName(node) {
-        var kind = node.kind;
-        return kind === 139 /* QualifiedName */
-            || kind === 69 /* Identifier */;
-    }
-    ts.isEntityName = isEntityName;
-    function isPropertyName(node) {
-        var kind = node.kind;
-        return kind === 69 /* Identifier */
-            || kind === 9 /* StringLiteral */
-            || kind === 8 /* NumericLiteral */
-            || kind === 140 /* ComputedPropertyName */;
-    }
-    ts.isPropertyName = isPropertyName;
-    function isModuleName(node) {
-        var kind = node.kind;
-        return kind === 69 /* Identifier */
-            || kind === 9 /* StringLiteral */;
-    }
-    ts.isModuleName = isModuleName;
-    function isBindingName(node) {
-        var kind = node.kind;
-        return kind === 69 /* Identifier */
-            || kind === 167 /* ObjectBindingPattern */
-            || kind === 168 /* ArrayBindingPattern */;
-    }
-    ts.isBindingName = isBindingName;
-    // Signature elements
-    function isTypeParameter(node) {
-        return node.kind === 141 /* TypeParameter */;
-    }
-    ts.isTypeParameter = isTypeParameter;
-    function isParameter(node) {
-        return node.kind === 142 /* Parameter */;
-    }
-    ts.isParameter = isParameter;
-    function isDecorator(node) {
-        return node.kind === 143 /* Decorator */;
-    }
-    ts.isDecorator = isDecorator;
-    // Type members
-    function isMethodDeclaration(node) {
-        return node.kind === 147 /* MethodDeclaration */;
-    }
-    ts.isMethodDeclaration = isMethodDeclaration;
-    function isClassElement(node) {
-        var kind = node.kind;
-        return kind === 148 /* Constructor */
-            || kind === 145 /* PropertyDeclaration */
-            || kind === 147 /* MethodDeclaration */
-            || kind === 149 /* GetAccessor */
-            || kind === 150 /* SetAccessor */
-            || kind === 153 /* IndexSignature */
-            || kind === 198 /* SemicolonClassElement */;
-    }
-    ts.isClassElement = isClassElement;
-    function isObjectLiteralElementLike(node) {
-        var kind = node.kind;
-        return kind === 253 /* PropertyAssignment */
-            || kind === 254 /* ShorthandPropertyAssignment */
-            || kind === 147 /* MethodDeclaration */
-            || kind === 149 /* GetAccessor */
-            || kind === 150 /* SetAccessor */
-            || kind === 239 /* MissingDeclaration */;
-    }
-    ts.isObjectLiteralElementLike = isObjectLiteralElementLike;
-    // Type
-    function isTypeNodeKind(kind) {
-        return (kind >= 154 /* FirstTypeNode */ && kind <= 166 /* LastTypeNode */)
-            || kind === 117 /* AnyKeyword */
-            || kind === 130 /* NumberKeyword */
-            || kind === 120 /* BooleanKeyword */
-            || kind === 132 /* StringKeyword */
-            || kind === 133 /* SymbolKeyword */
-            || kind === 103 /* VoidKeyword */
-            || kind === 127 /* NeverKeyword */
-            || kind === 194 /* ExpressionWithTypeArguments */;
-    }
-    /**
-     * Node test that determines whether a node is a valid type node.
-     * This differs from the `isPartOfTypeNode` function which determines whether a node is *part*
-     * of a TypeNode.
-     */
-    function isTypeNode(node) {
-        return isTypeNodeKind(node.kind);
-    }
-    ts.isTypeNode = isTypeNode;
-    // Binding patterns
-    function isBindingPattern(node) {
-        if (node) {
-            var kind = node.kind;
-            return kind === 168 /* ArrayBindingPattern */
-                || kind === 167 /* ObjectBindingPattern */;
-        }
-        return false;
-    }
-    ts.isBindingPattern = isBindingPattern;
-    function isBindingElement(node) {
-        return node.kind === 169 /* BindingElement */;
-    }
-    ts.isBindingElement = isBindingElement;
-    function isArrayBindingElement(node) {
-        var kind = node.kind;
-        return kind === 169 /* BindingElement */
-            || kind === 193 /* OmittedExpression */;
-    }
-    ts.isArrayBindingElement = isArrayBindingElement;
-    // Expression
-    function isPropertyAccessExpression(node) {
-        return node.kind === 172 /* PropertyAccessExpression */;
-    }
-    ts.isPropertyAccessExpression = isPropertyAccessExpression;
-    function isElementAccessExpression(node) {
-        return node.kind === 173 /* ElementAccessExpression */;
-    }
-    ts.isElementAccessExpression = isElementAccessExpression;
-    function isBinaryExpression(node) {
-        return node.kind === 187 /* BinaryExpression */;
-    }
-    ts.isBinaryExpression = isBinaryExpression;
-    function isConditionalExpression(node) {
-        return node.kind === 188 /* ConditionalExpression */;
-    }
-    ts.isConditionalExpression = isConditionalExpression;
-    function isCallExpression(node) {
-        return node.kind === 174 /* CallExpression */;
-    }
-    ts.isCallExpression = isCallExpression;
-    function isTemplate(node) {
-        var kind = node.kind;
-        return kind === 189 /* TemplateExpression */
-            || kind === 11 /* NoSubstitutionTemplateLiteral */;
-    }
-    ts.isTemplate = isTemplate;
-    function isSpreadElementExpression(node) {
-        return node.kind === 191 /* SpreadElementExpression */;
-    }
-    ts.isSpreadElementExpression = isSpreadElementExpression;
-    function isExpressionWithTypeArguments(node) {
-        return node.kind === 194 /* ExpressionWithTypeArguments */;
-    }
-    ts.isExpressionWithTypeArguments = isExpressionWithTypeArguments;
-    function isLeftHandSideExpressionKind(kind) {
-        return kind === 172 /* PropertyAccessExpression */
-            || kind === 173 /* ElementAccessExpression */
-            || kind === 175 /* NewExpression */
-            || kind === 174 /* CallExpression */
-            || kind === 241 /* JsxElement */
-            || kind === 242 /* JsxSelfClosingElement */
-            || kind === 176 /* TaggedTemplateExpression */
-            || kind === 170 /* ArrayLiteralExpression */
-            || kind === 178 /* ParenthesizedExpression */
-            || kind === 171 /* ObjectLiteralExpression */
-            || kind === 192 /* ClassExpression */
-            || kind === 179 /* FunctionExpression */
-            || kind === 69 /* Identifier */
-            || kind === 10 /* RegularExpressionLiteral */
-            || kind === 8 /* NumericLiteral */
-            || kind === 9 /* StringLiteral */
-            || kind === 11 /* NoSubstitutionTemplateLiteral */
-            || kind === 189 /* TemplateExpression */
-            || kind === 84 /* FalseKeyword */
-            || kind === 93 /* NullKeyword */
-            || kind === 97 /* ThisKeyword */
-            || kind === 99 /* TrueKeyword */
-            || kind === 95 /* SuperKeyword */
-            || kind === 196 /* NonNullExpression */;
-    }
-    function isLeftHandSideExpression(node) {
-        return isLeftHandSideExpressionKind(ts.skipPartiallyEmittedExpressions(node).kind);
-    }
-    ts.isLeftHandSideExpression = isLeftHandSideExpression;
-    function isUnaryExpressionKind(kind) {
-        return kind === 185 /* PrefixUnaryExpression */
-            || kind === 186 /* PostfixUnaryExpression */
-            || kind === 181 /* DeleteExpression */
-            || kind === 182 /* TypeOfExpression */
-            || kind === 183 /* VoidExpression */
-            || kind === 184 /* AwaitExpression */
-            || kind === 177 /* TypeAssertionExpression */
-            || isLeftHandSideExpressionKind(kind);
-    }
-    function isUnaryExpression(node) {
-        return isUnaryExpressionKind(ts.skipPartiallyEmittedExpressions(node).kind);
-    }
-    ts.isUnaryExpression = isUnaryExpression;
-    function isExpressionKind(kind) {
-        return kind === 188 /* ConditionalExpression */
-            || kind === 190 /* YieldExpression */
-            || kind === 180 /* ArrowFunction */
-            || kind === 187 /* BinaryExpression */
-            || kind === 191 /* SpreadElementExpression */
-            || kind === 195 /* AsExpression */
-            || kind === 193 /* OmittedExpression */
-            || isUnaryExpressionKind(kind);
-    }
-    function isExpression(node) {
-        return isExpressionKind(ts.skipPartiallyEmittedExpressions(node).kind);
-    }
-    ts.isExpression = isExpression;
-    function isAssertionExpression(node) {
-        var kind = node.kind;
-        return kind === 177 /* TypeAssertionExpression */
-            || kind === 195 /* AsExpression */;
-    }
-    ts.isAssertionExpression = isAssertionExpression;
-    function isPartiallyEmittedExpression(node) {
-        return node.kind === 288 /* PartiallyEmittedExpression */;
-    }
-    ts.isPartiallyEmittedExpression = isPartiallyEmittedExpression;
-    function isNotEmittedStatement(node) {
-        return node.kind === 287 /* NotEmittedStatement */;
-    }
-    ts.isNotEmittedStatement = isNotEmittedStatement;
-    function isNotEmittedOrPartiallyEmittedNode(node) {
-        return isNotEmittedStatement(node)
-            || isPartiallyEmittedExpression(node);
-    }
-    ts.isNotEmittedOrPartiallyEmittedNode = isNotEmittedOrPartiallyEmittedNode;
-    function isOmittedExpression(node) {
-        return node.kind === 193 /* OmittedExpression */;
-    }
-    ts.isOmittedExpression = isOmittedExpression;
-    // Misc
-    function isTemplateSpan(node) {
-        return node.kind === 197 /* TemplateSpan */;
-    }
-    ts.isTemplateSpan = isTemplateSpan;
-    // Element
-    function isBlock(node) {
-        return node.kind === 199 /* Block */;
-    }
-    ts.isBlock = isBlock;
-    function isConciseBody(node) {
-        return isBlock(node)
-            || isExpression(node);
-    }
-    ts.isConciseBody = isConciseBody;
-    function isFunctionBody(node) {
-        return isBlock(node);
-    }
-    ts.isFunctionBody = isFunctionBody;
-    function isForInitializer(node) {
-        return isVariableDeclarationList(node)
-            || isExpression(node);
-    }
-    ts.isForInitializer = isForInitializer;
-    function isVariableDeclaration(node) {
-        return node.kind === 218 /* VariableDeclaration */;
-    }
-    ts.isVariableDeclaration = isVariableDeclaration;
-    function isVariableDeclarationList(node) {
-        return node.kind === 219 /* VariableDeclarationList */;
-    }
-    ts.isVariableDeclarationList = isVariableDeclarationList;
-    function isCaseBlock(node) {
-        return node.kind === 227 /* CaseBlock */;
-    }
-    ts.isCaseBlock = isCaseBlock;
-    function isModuleBody(node) {
-        var kind = node.kind;
-        return kind === 226 /* ModuleBlock */
-            || kind === 225 /* ModuleDeclaration */;
-    }
-    ts.isModuleBody = isModuleBody;
-    function isImportEqualsDeclaration(node) {
-        return node.kind === 229 /* ImportEqualsDeclaration */;
-    }
-    ts.isImportEqualsDeclaration = isImportEqualsDeclaration;
-    function isImportClause(node) {
-        return node.kind === 231 /* ImportClause */;
-    }
-    ts.isImportClause = isImportClause;
-    function isNamedImportBindings(node) {
-        var kind = node.kind;
-        return kind === 233 /* NamedImports */
-            || kind === 232 /* NamespaceImport */;
-    }
-    ts.isNamedImportBindings = isNamedImportBindings;
-    function isImportSpecifier(node) {
-        return node.kind === 234 /* ImportSpecifier */;
-    }
-    ts.isImportSpecifier = isImportSpecifier;
-    function isNamedExports(node) {
-        return node.kind === 237 /* NamedExports */;
-    }
-    ts.isNamedExports = isNamedExports;
-    function isExportSpecifier(node) {
-        return node.kind === 238 /* ExportSpecifier */;
-    }
-    ts.isExportSpecifier = isExportSpecifier;
-    function isModuleOrEnumDeclaration(node) {
-        return node.kind === 225 /* ModuleDeclaration */ || node.kind === 224 /* EnumDeclaration */;
-    }
-    ts.isModuleOrEnumDeclaration = isModuleOrEnumDeclaration;
-    function isDeclarationKind(kind) {
-        return kind === 180 /* ArrowFunction */
-            || kind === 169 /* BindingElement */
-            || kind === 221 /* ClassDeclaration */
-            || kind === 192 /* ClassExpression */
-            || kind === 148 /* Constructor */
-            || kind === 224 /* EnumDeclaration */
-            || kind === 255 /* EnumMember */
-            || kind === 238 /* ExportSpecifier */
-            || kind === 220 /* FunctionDeclaration */
-            || kind === 179 /* FunctionExpression */
-            || kind === 149 /* GetAccessor */
-            || kind === 231 /* ImportClause */
-            || kind === 229 /* ImportEqualsDeclaration */
-            || kind === 234 /* ImportSpecifier */
-            || kind === 222 /* InterfaceDeclaration */
-            || kind === 147 /* MethodDeclaration */
-            || kind === 146 /* MethodSignature */
-            || kind === 225 /* ModuleDeclaration */
-            || kind === 228 /* NamespaceExportDeclaration */
-            || kind === 232 /* NamespaceImport */
-            || kind === 142 /* Parameter */
-            || kind === 253 /* PropertyAssignment */
-            || kind === 145 /* PropertyDeclaration */
-            || kind === 144 /* PropertySignature */
-            || kind === 150 /* SetAccessor */
-            || kind === 254 /* ShorthandPropertyAssignment */
-            || kind === 223 /* TypeAliasDeclaration */
-            || kind === 141 /* TypeParameter */
-            || kind === 218 /* VariableDeclaration */
-            || kind === 279 /* JSDocTypedefTag */;
-    }
-    function isDeclarationStatementKind(kind) {
-        return kind === 220 /* FunctionDeclaration */
-            || kind === 239 /* MissingDeclaration */
-            || kind === 221 /* ClassDeclaration */
-            || kind === 222 /* InterfaceDeclaration */
-            || kind === 223 /* TypeAliasDeclaration */
-            || kind === 224 /* EnumDeclaration */
-            || kind === 225 /* ModuleDeclaration */
-            || kind === 230 /* ImportDeclaration */
-            || kind === 229 /* ImportEqualsDeclaration */
-            || kind === 236 /* ExportDeclaration */
-            || kind === 235 /* ExportAssignment */
-            || kind === 228 /* NamespaceExportDeclaration */;
-    }
-    function isStatementKindButNotDeclarationKind(kind) {
-        return kind === 210 /* BreakStatement */
-            || kind === 209 /* ContinueStatement */
-            || kind === 217 /* DebuggerStatement */
-            || kind === 204 /* DoStatement */
-            || kind === 202 /* ExpressionStatement */
-            || kind === 201 /* EmptyStatement */
-            || kind === 207 /* ForInStatement */
-            || kind === 208 /* ForOfStatement */
-            || kind === 206 /* ForStatement */
-            || kind === 203 /* IfStatement */
-            || kind === 214 /* LabeledStatement */
-            || kind === 211 /* ReturnStatement */
-            || kind === 213 /* SwitchStatement */
-            || kind === 215 /* ThrowStatement */
-            || kind === 216 /* TryStatement */
-            || kind === 200 /* VariableStatement */
-            || kind === 205 /* WhileStatement */
-            || kind === 212 /* WithStatement */
-            || kind === 287 /* NotEmittedStatement */;
-    }
-    function isDeclaration(node) {
-        return isDeclarationKind(node.kind);
-    }
-    ts.isDeclaration = isDeclaration;
-    function isDeclarationStatement(node) {
-        return isDeclarationStatementKind(node.kind);
-    }
-    ts.isDeclarationStatement = isDeclarationStatement;
-    /**
-     * Determines whether the node is a statement that is not also a declaration
-     */
-    function isStatementButNotDeclaration(node) {
-        return isStatementKindButNotDeclarationKind(node.kind);
-    }
-    ts.isStatementButNotDeclaration = isStatementButNotDeclaration;
-    function isStatement(node) {
-        var kind = node.kind;
-        return isStatementKindButNotDeclarationKind(kind)
-            || isDeclarationStatementKind(kind)
-            || kind === 199 /* Block */;
-    }
-    ts.isStatement = isStatement;
-    // Module references
-    function isModuleReference(node) {
-        var kind = node.kind;
-        return kind === 240 /* ExternalModuleReference */
-            || kind === 139 /* QualifiedName */
-            || kind === 69 /* Identifier */;
-    }
-    ts.isModuleReference = isModuleReference;
-    // JSX
-    function isJsxOpeningElement(node) {
-        return node.kind === 243 /* JsxOpeningElement */;
-    }
-    ts.isJsxOpeningElement = isJsxOpeningElement;
-    function isJsxClosingElement(node) {
-        return node.kind === 245 /* JsxClosingElement */;
-    }
-    ts.isJsxClosingElement = isJsxClosingElement;
-    function isJsxTagNameExpression(node) {
-        var kind = node.kind;
-        return kind === 97 /* ThisKeyword */
-            || kind === 69 /* Identifier */
-            || kind === 172 /* PropertyAccessExpression */;
-    }
-    ts.isJsxTagNameExpression = isJsxTagNameExpression;
-    function isJsxChild(node) {
-        var kind = node.kind;
-        return kind === 241 /* JsxElement */
-            || kind === 248 /* JsxExpression */
-            || kind === 242 /* JsxSelfClosingElement */
-            || kind === 244 /* JsxText */;
-    }
-    ts.isJsxChild = isJsxChild;
-    function isJsxAttributeLike(node) {
-        var kind = node.kind;
-        return kind === 246 /* JsxAttribute */
-            || kind === 247 /* JsxSpreadAttribute */;
-    }
-    ts.isJsxAttributeLike = isJsxAttributeLike;
-    function isJsxSpreadAttribute(node) {
-        return node.kind === 247 /* JsxSpreadAttribute */;
-    }
-    ts.isJsxSpreadAttribute = isJsxSpreadAttribute;
-    function isJsxAttribute(node) {
-        return node.kind === 246 /* JsxAttribute */;
-    }
-    ts.isJsxAttribute = isJsxAttribute;
-    function isStringLiteralOrJsxExpression(node) {
-        var kind = node.kind;
-        return kind === 9 /* StringLiteral */
-            || kind === 248 /* JsxExpression */;
-    }
-    ts.isStringLiteralOrJsxExpression = isStringLiteralOrJsxExpression;
-    // Clauses
-    function isCaseOrDefaultClause(node) {
-        var kind = node.kind;
-        return kind === 249 /* CaseClause */
-            || kind === 250 /* DefaultClause */;
-    }
-    ts.isCaseOrDefaultClause = isCaseOrDefaultClause;
-    function isHeritageClause(node) {
-        return node.kind === 251 /* HeritageClause */;
-    }
-    ts.isHeritageClause = isHeritageClause;
-    function isCatchClause(node) {
-        return node.kind === 252 /* CatchClause */;
-    }
-    ts.isCatchClause = isCatchClause;
-    // Property assignments
-    function isPropertyAssignment(node) {
-        return node.kind === 253 /* PropertyAssignment */;
-    }
-    ts.isPropertyAssignment = isPropertyAssignment;
-    function isShorthandPropertyAssignment(node) {
-        return node.kind === 254 /* ShorthandPropertyAssignment */;
-    }
-    ts.isShorthandPropertyAssignment = isShorthandPropertyAssignment;
-    // Enum
-    function isEnumMember(node) {
-        return node.kind === 255 /* EnumMember */;
-    }
-    ts.isEnumMember = isEnumMember;
-    // Top-level nodes
-    function isSourceFile(node) {
-        return node.kind === 256 /* SourceFile */;
-    }
-    ts.isSourceFile = isSourceFile;
     function isWatchSet(options) {
         // Firefox has Object.prototype.watch
         return options.watch && options.hasOwnProperty("watch");
     }
     ts.isWatchSet = isWatchSet;
+    function getCheckFlags(symbol) {
+        return symbol.flags & 134217728 /* Transient */ ? symbol.checkFlags : 0;
+    }
+    ts.getCheckFlags = getCheckFlags;
+    function getDeclarationModifierFlagsFromSymbol(s) {
+        if (s.valueDeclaration) {
+            var flags = ts.getCombinedModifierFlags(s.valueDeclaration);
+            return s.parent && s.parent.flags & 32 /* Class */ ? flags : flags & ~28 /* AccessibilityModifier */;
+        }
+        if (getCheckFlags(s) & 6 /* Synthetic */) {
+            var checkFlags = s.checkFlags;
+            var accessModifier = checkFlags & 256 /* ContainsPrivate */ ? 8 /* Private */ :
+                checkFlags & 64 /* ContainsPublic */ ? 4 /* Public */ :
+                    16 /* Protected */;
+            var staticModifier = checkFlags & 512 /* ContainsStatic */ ? 32 /* Static */ : 0;
+            return accessModifier | staticModifier;
+        }
+        if (s.flags & 16777216 /* Prototype */) {
+            return 4 /* Public */ | 32 /* Static */;
+        }
+        return 0;
+    }
+    ts.getDeclarationModifierFlagsFromSymbol = getDeclarationModifierFlagsFromSymbol;
+    function levenshtein(s1, s2) {
+        var previous = new Array(s2.length + 1);
+        var current = new Array(s2.length + 1);
+        for (var i = 0; i < s2.length + 1; i++) {
+            previous[i] = i;
+            current[i] = -1;
+        }
+        for (var i = 1; i < s1.length + 1; i++) {
+            current[0] = i;
+            for (var j = 1; j < s2.length + 1; j++) {
+                current[j] = Math.min(previous[j] + 1, current[j - 1] + 1, previous[j - 1] + (s1[i - 1] === s2[j - 1] ? 0 : 2));
+            }
+            // shift current back to previous, and then reuse previous' array
+            var tmp = previous;
+            previous = current;
+            current = tmp;
+        }
+        return previous[previous.length - 1];
+    }
+    ts.levenshtein = levenshtein;
 })(ts || (ts = {}));
-var ts;
 (function (ts) {
     function getDefaultLibFileName(options) {
-        return options.target === 2 /* ES6 */ ? "lib.es6.d.ts" : "lib.d.ts";
+        switch (options.target) {
+            case 5 /* ESNext */:
+                return "lib.esnext.full.d.ts";
+            case 4 /* ES2017 */:
+                return "lib.es2017.full.d.ts";
+            case 3 /* ES2016 */:
+                return "lib.es2016.full.d.ts";
+            case 2 /* ES2015 */:
+                return "lib.es6.d.ts"; // We don't use lib.es2015.full.d.ts due to breaking change.
+            default:
+                return "lib.d.ts";
+        }
     }
     ts.getDefaultLibFileName = getDefaultLibFileName;
     function textSpanEnd(span) {
@@ -7566,13 +7624,13 @@ var ts;
             oldEndN = Math.max(oldEnd1, oldEnd1 + (oldEnd2 - newEnd1));
             newEndN = Math.max(newEnd2, newEnd2 + (newEnd1 - oldEnd2));
         }
-        return createTextChangeRange(createTextSpanFromBounds(oldStartN, oldEndN), /*newLength:*/ newEndN - oldStartN);
+        return createTextChangeRange(createTextSpanFromBounds(oldStartN, oldEndN), /*newLength*/ newEndN - oldStartN);
     }
     ts.collapseTextChangeRangesAcrossMultipleVersions = collapseTextChangeRangesAcrossMultipleVersions;
     function getTypeParameterOwner(d) {
-        if (d && d.kind === 141 /* TypeParameter */) {
+        if (d && d.kind === 145 /* TypeParameter */) {
             for (var current = d; current; current = current.parent) {
-                if (ts.isFunctionLike(current) || ts.isClassLike(current) || current.kind === 222 /* InterfaceDeclaration */) {
+                if (ts.isFunctionLike(current) || ts.isClassLike(current) || current.kind === 230 /* InterfaceDeclaration */) {
                     return current;
                 }
             }
@@ -7580,11 +7638,11 @@ var ts;
     }
     ts.getTypeParameterOwner = getTypeParameterOwner;
     function isParameterPropertyDeclaration(node) {
-        return ts.hasModifier(node, 92 /* ParameterPropertyModifier */) && node.parent.kind === 148 /* Constructor */ && ts.isClassLike(node.parent.parent);
+        return ts.hasModifier(node, 92 /* ParameterPropertyModifier */) && node.parent.kind === 152 /* Constructor */ && ts.isClassLike(node.parent.parent);
     }
     ts.isParameterPropertyDeclaration = isParameterPropertyDeclaration;
     function walkUpBindingElementsAndPatterns(node) {
-        while (node && (node.kind === 169 /* BindingElement */ || ts.isBindingPattern(node))) {
+        while (node && (node.kind === 176 /* BindingElement */ || ts.isBindingPattern(node))) {
             node = node.parent;
         }
         return node;
@@ -7592,14 +7650,14 @@ var ts;
     function getCombinedModifierFlags(node) {
         node = walkUpBindingElementsAndPatterns(node);
         var flags = ts.getModifierFlags(node);
-        if (node.kind === 218 /* VariableDeclaration */) {
+        if (node.kind === 226 /* VariableDeclaration */) {
             node = node.parent;
         }
-        if (node && node.kind === 219 /* VariableDeclarationList */) {
+        if (node && node.kind === 227 /* VariableDeclarationList */) {
             flags |= ts.getModifierFlags(node);
             node = node.parent;
         }
-        if (node && node.kind === 200 /* VariableStatement */) {
+        if (node && node.kind === 208 /* VariableStatement */) {
             flags |= ts.getModifierFlags(node);
         }
         return flags;
@@ -7615,500 +7673,1959 @@ var ts;
     function getCombinedNodeFlags(node) {
         node = walkUpBindingElementsAndPatterns(node);
         var flags = node.flags;
-        if (node.kind === 218 /* VariableDeclaration */) {
+        if (node.kind === 226 /* VariableDeclaration */) {
             node = node.parent;
         }
-        if (node && node.kind === 219 /* VariableDeclarationList */) {
+        if (node && node.kind === 227 /* VariableDeclarationList */) {
             flags |= node.flags;
             node = node.parent;
         }
-        if (node && node.kind === 200 /* VariableStatement */) {
+        if (node && node.kind === 208 /* VariableStatement */) {
             flags |= node.flags;
         }
         return flags;
     }
     ts.getCombinedNodeFlags = getCombinedNodeFlags;
+    /**
+     * Checks to see if the locale is in the appropriate format,
+     * and if it is, attempts to set the appropriate language.
+     */
+    function validateLocaleAndSetLanguage(locale, sys, errors) {
+        var matchResult = /^([a-z]+)([_\-]([a-z]+))?$/.exec(locale.toLowerCase());
+        if (!matchResult) {
+            if (errors) {
+                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Locale_must_be_of_the_form_language_or_language_territory_For_example_0_or_1, "en", "ja-jp"));
+            }
+            return;
+        }
+        var language = matchResult[1];
+        var territory = matchResult[3];
+        // First try the entire locale, then fall back to just language if that's all we have.
+        // Either ways do not fail, and fallback to the English diagnostic strings.
+        if (!trySetLanguageAndTerritory(language, territory, errors)) {
+            trySetLanguageAndTerritory(language, /*territory*/ undefined, errors);
+        }
+        function trySetLanguageAndTerritory(language, territory, errors) {
+            var compilerFilePath = ts.normalizePath(sys.getExecutingFilePath());
+            var containingDirectoryPath = ts.getDirectoryPath(compilerFilePath);
+            var filePath = ts.combinePaths(containingDirectoryPath, language);
+            if (territory) {
+                filePath = filePath + "-" + territory;
+            }
+            filePath = sys.resolvePath(ts.combinePaths(filePath, "diagnosticMessages.generated.json"));
+            if (!sys.fileExists(filePath)) {
+                return false;
+            }
+            // TODO: Add codePage support for readFile?
+            var fileContents = "";
+            try {
+                fileContents = sys.readFile(filePath);
+            }
+            catch (e) {
+                if (errors) {
+                    errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unable_to_open_file_0, filePath));
+                }
+                return false;
+            }
+            try {
+                ts.localizedDiagnosticMessages = JSON.parse(fileContents);
+            }
+            catch (e) {
+                if (errors) {
+                    errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Corrupted_locale_file_0, filePath));
+                }
+                return false;
+            }
+            return true;
+        }
+    }
+    ts.validateLocaleAndSetLanguage = validateLocaleAndSetLanguage;
+    function getOriginalNode(node, nodeTest) {
+        if (node) {
+            while (node.original !== undefined) {
+                node = node.original;
+            }
+        }
+        return !nodeTest || nodeTest(node) ? node : undefined;
+    }
+    ts.getOriginalNode = getOriginalNode;
+    /**
+     * Gets a value indicating whether a node originated in the parse tree.
+     *
+     * @param node The node to test.
+     */
+    function isParseTreeNode(node) {
+        return (node.flags & 8 /* Synthesized */) === 0;
+    }
+    ts.isParseTreeNode = isParseTreeNode;
+    function getParseTreeNode(node, nodeTest) {
+        if (node === undefined || isParseTreeNode(node)) {
+            return node;
+        }
+        node = getOriginalNode(node);
+        if (isParseTreeNode(node) && (!nodeTest || nodeTest(node))) {
+            return node;
+        }
+        return undefined;
+    }
+    ts.getParseTreeNode = getParseTreeNode;
+    /**
+     * Remove extra underscore from escaped identifier text content.
+     *
+     * @param identifier The escaped identifier text.
+     * @returns The unescaped identifier text.
+     */
+    function unescapeIdentifier(identifier) {
+        return identifier.length >= 3 && identifier.charCodeAt(0) === 95 /* _ */ && identifier.charCodeAt(1) === 95 /* _ */ && identifier.charCodeAt(2) === 95 /* _ */ ? identifier.substr(1) : identifier;
+    }
+    ts.unescapeIdentifier = unescapeIdentifier;
+    function getNameOfDeclaration(declaration) {
+        if (!declaration) {
+            return undefined;
+        }
+        if (declaration.kind === 194 /* BinaryExpression */) {
+            var expr = declaration;
+            switch (ts.getSpecialPropertyAssignmentKind(expr)) {
+                case 1 /* ExportsProperty */:
+                case 4 /* ThisProperty */:
+                case 5 /* Property */:
+                case 3 /* PrototypeProperty */:
+                    return expr.left.name;
+                default:
+                    return undefined;
+            }
+        }
+        else {
+            return declaration.name;
+        }
+    }
+    ts.getNameOfDeclaration = getNameOfDeclaration;
 })(ts || (ts = {}));
-// <auto-generated />
-/// <reference path="types.ts" />
-/* @internal */
-var ts;
+// Simple node tests of the form `node.kind === SyntaxKind.Foo`.
 (function (ts) {
-    ts.Diagnostics = {
-        Unterminated_string_literal: { code: 1002, category: ts.DiagnosticCategory.Error, key: "Unterminated_string_literal_1002", message: "Unterminated string literal." },
-        Identifier_expected: { code: 1003, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_1003", message: "Identifier expected." },
-        _0_expected: { code: 1005, category: ts.DiagnosticCategory.Error, key: "_0_expected_1005", message: "'{0}' expected." },
-        A_file_cannot_have_a_reference_to_itself: { code: 1006, category: ts.DiagnosticCategory.Error, key: "A_file_cannot_have_a_reference_to_itself_1006", message: "A file cannot have a reference to itself." },
-        Trailing_comma_not_allowed: { code: 1009, category: ts.DiagnosticCategory.Error, key: "Trailing_comma_not_allowed_1009", message: "Trailing comma not allowed." },
-        Asterisk_Slash_expected: { code: 1010, category: ts.DiagnosticCategory.Error, key: "Asterisk_Slash_expected_1010", message: "'*/' expected." },
-        Unexpected_token: { code: 1012, category: ts.DiagnosticCategory.Error, key: "Unexpected_token_1012", message: "Unexpected token." },
-        A_rest_parameter_must_be_last_in_a_parameter_list: { code: 1014, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_must_be_last_in_a_parameter_list_1014", message: "A rest parameter must be last in a parameter list." },
-        Parameter_cannot_have_question_mark_and_initializer: { code: 1015, category: ts.DiagnosticCategory.Error, key: "Parameter_cannot_have_question_mark_and_initializer_1015", message: "Parameter cannot have question mark and initializer." },
-        A_required_parameter_cannot_follow_an_optional_parameter: { code: 1016, category: ts.DiagnosticCategory.Error, key: "A_required_parameter_cannot_follow_an_optional_parameter_1016", message: "A required parameter cannot follow an optional parameter." },
-        An_index_signature_cannot_have_a_rest_parameter: { code: 1017, category: ts.DiagnosticCategory.Error, key: "An_index_signature_cannot_have_a_rest_parameter_1017", message: "An index signature cannot have a rest parameter." },
-        An_index_signature_parameter_cannot_have_an_accessibility_modifier: { code: 1018, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_cannot_have_an_accessibility_modifier_1018", message: "An index signature parameter cannot have an accessibility modifier." },
-        An_index_signature_parameter_cannot_have_a_question_mark: { code: 1019, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_cannot_have_a_question_mark_1019", message: "An index signature parameter cannot have a question mark." },
-        An_index_signature_parameter_cannot_have_an_initializer: { code: 1020, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_cannot_have_an_initializer_1020", message: "An index signature parameter cannot have an initializer." },
-        An_index_signature_must_have_a_type_annotation: { code: 1021, category: ts.DiagnosticCategory.Error, key: "An_index_signature_must_have_a_type_annotation_1021", message: "An index signature must have a type annotation." },
-        An_index_signature_parameter_must_have_a_type_annotation: { code: 1022, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_must_have_a_type_annotation_1022", message: "An index signature parameter must have a type annotation." },
-        An_index_signature_parameter_type_must_be_string_or_number: { code: 1023, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_type_must_be_string_or_number_1023", message: "An index signature parameter type must be 'string' or 'number'." },
-        readonly_modifier_can_only_appear_on_a_property_declaration_or_index_signature: { code: 1024, category: ts.DiagnosticCategory.Error, key: "readonly_modifier_can_only_appear_on_a_property_declaration_or_index_signature_1024", message: "'readonly' modifier can only appear on a property declaration or index signature." },
-        Accessibility_modifier_already_seen: { code: 1028, category: ts.DiagnosticCategory.Error, key: "Accessibility_modifier_already_seen_1028", message: "Accessibility modifier already seen." },
-        _0_modifier_must_precede_1_modifier: { code: 1029, category: ts.DiagnosticCategory.Error, key: "_0_modifier_must_precede_1_modifier_1029", message: "'{0}' modifier must precede '{1}' modifier." },
-        _0_modifier_already_seen: { code: 1030, category: ts.DiagnosticCategory.Error, key: "_0_modifier_already_seen_1030", message: "'{0}' modifier already seen." },
-        _0_modifier_cannot_appear_on_a_class_element: { code: 1031, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_class_element_1031", message: "'{0}' modifier cannot appear on a class element." },
-        super_must_be_followed_by_an_argument_list_or_member_access: { code: 1034, category: ts.DiagnosticCategory.Error, key: "super_must_be_followed_by_an_argument_list_or_member_access_1034", message: "'super' must be followed by an argument list or member access." },
-        Only_ambient_modules_can_use_quoted_names: { code: 1035, category: ts.DiagnosticCategory.Error, key: "Only_ambient_modules_can_use_quoted_names_1035", message: "Only ambient modules can use quoted names." },
-        Statements_are_not_allowed_in_ambient_contexts: { code: 1036, category: ts.DiagnosticCategory.Error, key: "Statements_are_not_allowed_in_ambient_contexts_1036", message: "Statements are not allowed in ambient contexts." },
-        A_declare_modifier_cannot_be_used_in_an_already_ambient_context: { code: 1038, category: ts.DiagnosticCategory.Error, key: "A_declare_modifier_cannot_be_used_in_an_already_ambient_context_1038", message: "A 'declare' modifier cannot be used in an already ambient context." },
-        Initializers_are_not_allowed_in_ambient_contexts: { code: 1039, category: ts.DiagnosticCategory.Error, key: "Initializers_are_not_allowed_in_ambient_contexts_1039", message: "Initializers are not allowed in ambient contexts." },
-        _0_modifier_cannot_be_used_in_an_ambient_context: { code: 1040, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_in_an_ambient_context_1040", message: "'{0}' modifier cannot be used in an ambient context." },
-        _0_modifier_cannot_be_used_with_a_class_declaration: { code: 1041, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_with_a_class_declaration_1041", message: "'{0}' modifier cannot be used with a class declaration." },
-        _0_modifier_cannot_be_used_here: { code: 1042, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_here_1042", message: "'{0}' modifier cannot be used here." },
-        _0_modifier_cannot_appear_on_a_data_property: { code: 1043, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_data_property_1043", message: "'{0}' modifier cannot appear on a data property." },
-        _0_modifier_cannot_appear_on_a_module_or_namespace_element: { code: 1044, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_module_or_namespace_element_1044", message: "'{0}' modifier cannot appear on a module or namespace element." },
-        A_0_modifier_cannot_be_used_with_an_interface_declaration: { code: 1045, category: ts.DiagnosticCategory.Error, key: "A_0_modifier_cannot_be_used_with_an_interface_declaration_1045", message: "A '{0}' modifier cannot be used with an interface declaration." },
-        A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file: { code: 1046, category: ts.DiagnosticCategory.Error, key: "A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file_1046", message: "A 'declare' modifier is required for a top level declaration in a .d.ts file." },
-        A_rest_parameter_cannot_be_optional: { code: 1047, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_cannot_be_optional_1047", message: "A rest parameter cannot be optional." },
-        A_rest_parameter_cannot_have_an_initializer: { code: 1048, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_cannot_have_an_initializer_1048", message: "A rest parameter cannot have an initializer." },
-        A_set_accessor_must_have_exactly_one_parameter: { code: 1049, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_must_have_exactly_one_parameter_1049", message: "A 'set' accessor must have exactly one parameter." },
-        A_set_accessor_cannot_have_an_optional_parameter: { code: 1051, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_cannot_have_an_optional_parameter_1051", message: "A 'set' accessor cannot have an optional parameter." },
-        A_set_accessor_parameter_cannot_have_an_initializer: { code: 1052, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_parameter_cannot_have_an_initializer_1052", message: "A 'set' accessor parameter cannot have an initializer." },
-        A_set_accessor_cannot_have_rest_parameter: { code: 1053, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_cannot_have_rest_parameter_1053", message: "A 'set' accessor cannot have rest parameter." },
-        A_get_accessor_cannot_have_parameters: { code: 1054, category: ts.DiagnosticCategory.Error, key: "A_get_accessor_cannot_have_parameters_1054", message: "A 'get' accessor cannot have parameters." },
-        Type_0_is_not_a_valid_async_function_return_type: { code: 1055, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_a_valid_async_function_return_type_1055", message: "Type '{0}' is not a valid async function return type." },
-        Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher: { code: 1056, category: ts.DiagnosticCategory.Error, key: "Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher_1056", message: "Accessors are only available when targeting ECMAScript 5 and higher." },
-        An_async_function_or_method_must_have_a_valid_awaitable_return_type: { code: 1057, category: ts.DiagnosticCategory.Error, key: "An_async_function_or_method_must_have_a_valid_awaitable_return_type_1057", message: "An async function or method must have a valid awaitable return type." },
-        Operand_for_await_does_not_have_a_valid_callable_then_member: { code: 1058, category: ts.DiagnosticCategory.Error, key: "Operand_for_await_does_not_have_a_valid_callable_then_member_1058", message: "Operand for 'await' does not have a valid callable 'then' member." },
-        Return_expression_in_async_function_does_not_have_a_valid_callable_then_member: { code: 1059, category: ts.DiagnosticCategory.Error, key: "Return_expression_in_async_function_does_not_have_a_valid_callable_then_member_1059", message: "Return expression in async function does not have a valid callable 'then' member." },
-        Expression_body_for_async_arrow_function_does_not_have_a_valid_callable_then_member: { code: 1060, category: ts.DiagnosticCategory.Error, key: "Expression_body_for_async_arrow_function_does_not_have_a_valid_callable_then_member_1060", message: "Expression body for async arrow function does not have a valid callable 'then' member." },
-        Enum_member_must_have_initializer: { code: 1061, category: ts.DiagnosticCategory.Error, key: "Enum_member_must_have_initializer_1061", message: "Enum member must have initializer." },
-        _0_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method: { code: 1062, category: ts.DiagnosticCategory.Error, key: "_0_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method_1062", message: "{0} is referenced directly or indirectly in the fulfillment callback of its own 'then' method." },
-        An_export_assignment_cannot_be_used_in_a_namespace: { code: 1063, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_cannot_be_used_in_a_namespace_1063", message: "An export assignment cannot be used in a namespace." },
-        The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type: { code: 1064, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type_1064", message: "The return type of an async function or method must be the global Promise<T> type." },
-        In_ambient_enum_declarations_member_initializer_must_be_constant_expression: { code: 1066, category: ts.DiagnosticCategory.Error, key: "In_ambient_enum_declarations_member_initializer_must_be_constant_expression_1066", message: "In ambient enum declarations member initializer must be constant expression." },
-        Unexpected_token_A_constructor_method_accessor_or_property_was_expected: { code: 1068, category: ts.DiagnosticCategory.Error, key: "Unexpected_token_A_constructor_method_accessor_or_property_was_expected_1068", message: "Unexpected token. A constructor, method, accessor, or property was expected." },
-        _0_modifier_cannot_appear_on_a_type_member: { code: 1070, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_type_member_1070", message: "'{0}' modifier cannot appear on a type member." },
-        _0_modifier_cannot_appear_on_an_index_signature: { code: 1071, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_an_index_signature_1071", message: "'{0}' modifier cannot appear on an index signature." },
-        A_0_modifier_cannot_be_used_with_an_import_declaration: { code: 1079, category: ts.DiagnosticCategory.Error, key: "A_0_modifier_cannot_be_used_with_an_import_declaration_1079", message: "A '{0}' modifier cannot be used with an import declaration." },
-        Invalid_reference_directive_syntax: { code: 1084, category: ts.DiagnosticCategory.Error, key: "Invalid_reference_directive_syntax_1084", message: "Invalid 'reference' directive syntax." },
-        Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher: { code: 1085, category: ts.DiagnosticCategory.Error, key: "Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher_1085", message: "Octal literals are not available when targeting ECMAScript 5 and higher." },
-        An_accessor_cannot_be_declared_in_an_ambient_context: { code: 1086, category: ts.DiagnosticCategory.Error, key: "An_accessor_cannot_be_declared_in_an_ambient_context_1086", message: "An accessor cannot be declared in an ambient context." },
-        _0_modifier_cannot_appear_on_a_constructor_declaration: { code: 1089, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_constructor_declaration_1089", message: "'{0}' modifier cannot appear on a constructor declaration." },
-        _0_modifier_cannot_appear_on_a_parameter: { code: 1090, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_parameter_1090", message: "'{0}' modifier cannot appear on a parameter." },
-        Only_a_single_variable_declaration_is_allowed_in_a_for_in_statement: { code: 1091, category: ts.DiagnosticCategory.Error, key: "Only_a_single_variable_declaration_is_allowed_in_a_for_in_statement_1091", message: "Only a single variable declaration is allowed in a 'for...in' statement." },
-        Type_parameters_cannot_appear_on_a_constructor_declaration: { code: 1092, category: ts.DiagnosticCategory.Error, key: "Type_parameters_cannot_appear_on_a_constructor_declaration_1092", message: "Type parameters cannot appear on a constructor declaration." },
-        Type_annotation_cannot_appear_on_a_constructor_declaration: { code: 1093, category: ts.DiagnosticCategory.Error, key: "Type_annotation_cannot_appear_on_a_constructor_declaration_1093", message: "Type annotation cannot appear on a constructor declaration." },
-        An_accessor_cannot_have_type_parameters: { code: 1094, category: ts.DiagnosticCategory.Error, key: "An_accessor_cannot_have_type_parameters_1094", message: "An accessor cannot have type parameters." },
-        A_set_accessor_cannot_have_a_return_type_annotation: { code: 1095, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_cannot_have_a_return_type_annotation_1095", message: "A 'set' accessor cannot have a return type annotation." },
-        An_index_signature_must_have_exactly_one_parameter: { code: 1096, category: ts.DiagnosticCategory.Error, key: "An_index_signature_must_have_exactly_one_parameter_1096", message: "An index signature must have exactly one parameter." },
-        _0_list_cannot_be_empty: { code: 1097, category: ts.DiagnosticCategory.Error, key: "_0_list_cannot_be_empty_1097", message: "'{0}' list cannot be empty." },
-        Type_parameter_list_cannot_be_empty: { code: 1098, category: ts.DiagnosticCategory.Error, key: "Type_parameter_list_cannot_be_empty_1098", message: "Type parameter list cannot be empty." },
-        Type_argument_list_cannot_be_empty: { code: 1099, category: ts.DiagnosticCategory.Error, key: "Type_argument_list_cannot_be_empty_1099", message: "Type argument list cannot be empty." },
-        Invalid_use_of_0_in_strict_mode: { code: 1100, category: ts.DiagnosticCategory.Error, key: "Invalid_use_of_0_in_strict_mode_1100", message: "Invalid use of '{0}' in strict mode." },
-        with_statements_are_not_allowed_in_strict_mode: { code: 1101, category: ts.DiagnosticCategory.Error, key: "with_statements_are_not_allowed_in_strict_mode_1101", message: "'with' statements are not allowed in strict mode." },
-        delete_cannot_be_called_on_an_identifier_in_strict_mode: { code: 1102, category: ts.DiagnosticCategory.Error, key: "delete_cannot_be_called_on_an_identifier_in_strict_mode_1102", message: "'delete' cannot be called on an identifier in strict mode." },
-        A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement: { code: 1104, category: ts.DiagnosticCategory.Error, key: "A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement_1104", message: "A 'continue' statement can only be used within an enclosing iteration statement." },
-        A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement: { code: 1105, category: ts.DiagnosticCategory.Error, key: "A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement_1105", message: "A 'break' statement can only be used within an enclosing iteration or switch statement." },
-        Jump_target_cannot_cross_function_boundary: { code: 1107, category: ts.DiagnosticCategory.Error, key: "Jump_target_cannot_cross_function_boundary_1107", message: "Jump target cannot cross function boundary." },
-        A_return_statement_can_only_be_used_within_a_function_body: { code: 1108, category: ts.DiagnosticCategory.Error, key: "A_return_statement_can_only_be_used_within_a_function_body_1108", message: "A 'return' statement can only be used within a function body." },
-        Expression_expected: { code: 1109, category: ts.DiagnosticCategory.Error, key: "Expression_expected_1109", message: "Expression expected." },
-        Type_expected: { code: 1110, category: ts.DiagnosticCategory.Error, key: "Type_expected_1110", message: "Type expected." },
-        A_default_clause_cannot_appear_more_than_once_in_a_switch_statement: { code: 1113, category: ts.DiagnosticCategory.Error, key: "A_default_clause_cannot_appear_more_than_once_in_a_switch_statement_1113", message: "A 'default' clause cannot appear more than once in a 'switch' statement." },
-        Duplicate_label_0: { code: 1114, category: ts.DiagnosticCategory.Error, key: "Duplicate_label_0_1114", message: "Duplicate label '{0}'" },
-        A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement: { code: 1115, category: ts.DiagnosticCategory.Error, key: "A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement_1115", message: "A 'continue' statement can only jump to a label of an enclosing iteration statement." },
-        A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement: { code: 1116, category: ts.DiagnosticCategory.Error, key: "A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement_1116", message: "A 'break' statement can only jump to a label of an enclosing statement." },
-        An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode: { code: 1117, category: ts.DiagnosticCategory.Error, key: "An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode_1117", message: "An object literal cannot have multiple properties with the same name in strict mode." },
-        An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name: { code: 1118, category: ts.DiagnosticCategory.Error, key: "An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name_1118", message: "An object literal cannot have multiple get/set accessors with the same name." },
-        An_object_literal_cannot_have_property_and_accessor_with_the_same_name: { code: 1119, category: ts.DiagnosticCategory.Error, key: "An_object_literal_cannot_have_property_and_accessor_with_the_same_name_1119", message: "An object literal cannot have property and accessor with the same name." },
-        An_export_assignment_cannot_have_modifiers: { code: 1120, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_cannot_have_modifiers_1120", message: "An export assignment cannot have modifiers." },
-        Octal_literals_are_not_allowed_in_strict_mode: { code: 1121, category: ts.DiagnosticCategory.Error, key: "Octal_literals_are_not_allowed_in_strict_mode_1121", message: "Octal literals are not allowed in strict mode." },
-        A_tuple_type_element_list_cannot_be_empty: { code: 1122, category: ts.DiagnosticCategory.Error, key: "A_tuple_type_element_list_cannot_be_empty_1122", message: "A tuple type element list cannot be empty." },
-        Variable_declaration_list_cannot_be_empty: { code: 1123, category: ts.DiagnosticCategory.Error, key: "Variable_declaration_list_cannot_be_empty_1123", message: "Variable declaration list cannot be empty." },
-        Digit_expected: { code: 1124, category: ts.DiagnosticCategory.Error, key: "Digit_expected_1124", message: "Digit expected." },
-        Hexadecimal_digit_expected: { code: 1125, category: ts.DiagnosticCategory.Error, key: "Hexadecimal_digit_expected_1125", message: "Hexadecimal digit expected." },
-        Unexpected_end_of_text: { code: 1126, category: ts.DiagnosticCategory.Error, key: "Unexpected_end_of_text_1126", message: "Unexpected end of text." },
-        Invalid_character: { code: 1127, category: ts.DiagnosticCategory.Error, key: "Invalid_character_1127", message: "Invalid character." },
-        Declaration_or_statement_expected: { code: 1128, category: ts.DiagnosticCategory.Error, key: "Declaration_or_statement_expected_1128", message: "Declaration or statement expected." },
-        Statement_expected: { code: 1129, category: ts.DiagnosticCategory.Error, key: "Statement_expected_1129", message: "Statement expected." },
-        case_or_default_expected: { code: 1130, category: ts.DiagnosticCategory.Error, key: "case_or_default_expected_1130", message: "'case' or 'default' expected." },
-        Property_or_signature_expected: { code: 1131, category: ts.DiagnosticCategory.Error, key: "Property_or_signature_expected_1131", message: "Property or signature expected." },
-        Enum_member_expected: { code: 1132, category: ts.DiagnosticCategory.Error, key: "Enum_member_expected_1132", message: "Enum member expected." },
-        Variable_declaration_expected: { code: 1134, category: ts.DiagnosticCategory.Error, key: "Variable_declaration_expected_1134", message: "Variable declaration expected." },
-        Argument_expression_expected: { code: 1135, category: ts.DiagnosticCategory.Error, key: "Argument_expression_expected_1135", message: "Argument expression expected." },
-        Property_assignment_expected: { code: 1136, category: ts.DiagnosticCategory.Error, key: "Property_assignment_expected_1136", message: "Property assignment expected." },
-        Expression_or_comma_expected: { code: 1137, category: ts.DiagnosticCategory.Error, key: "Expression_or_comma_expected_1137", message: "Expression or comma expected." },
-        Parameter_declaration_expected: { code: 1138, category: ts.DiagnosticCategory.Error, key: "Parameter_declaration_expected_1138", message: "Parameter declaration expected." },
-        Type_parameter_declaration_expected: { code: 1139, category: ts.DiagnosticCategory.Error, key: "Type_parameter_declaration_expected_1139", message: "Type parameter declaration expected." },
-        Type_argument_expected: { code: 1140, category: ts.DiagnosticCategory.Error, key: "Type_argument_expected_1140", message: "Type argument expected." },
-        String_literal_expected: { code: 1141, category: ts.DiagnosticCategory.Error, key: "String_literal_expected_1141", message: "String literal expected." },
-        Line_break_not_permitted_here: { code: 1142, category: ts.DiagnosticCategory.Error, key: "Line_break_not_permitted_here_1142", message: "Line break not permitted here." },
-        or_expected: { code: 1144, category: ts.DiagnosticCategory.Error, key: "or_expected_1144", message: "'{' or ';' expected." },
-        Declaration_expected: { code: 1146, category: ts.DiagnosticCategory.Error, key: "Declaration_expected_1146", message: "Declaration expected." },
-        Import_declarations_in_a_namespace_cannot_reference_a_module: { code: 1147, category: ts.DiagnosticCategory.Error, key: "Import_declarations_in_a_namespace_cannot_reference_a_module_1147", message: "Import declarations in a namespace cannot reference a module." },
-        Cannot_use_imports_exports_or_module_augmentations_when_module_is_none: { code: 1148, category: ts.DiagnosticCategory.Error, key: "Cannot_use_imports_exports_or_module_augmentations_when_module_is_none_1148", message: "Cannot use imports, exports, or module augmentations when '--module' is 'none'." },
-        File_name_0_differs_from_already_included_file_name_1_only_in_casing: { code: 1149, category: ts.DiagnosticCategory.Error, key: "File_name_0_differs_from_already_included_file_name_1_only_in_casing_1149", message: "File name '{0}' differs from already included file name '{1}' only in casing" },
-        new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead: { code: 1150, category: ts.DiagnosticCategory.Error, key: "new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead_1150", message: "'new T[]' cannot be used to create an array. Use 'new Array<T>()' instead." },
-        const_declarations_must_be_initialized: { code: 1155, category: ts.DiagnosticCategory.Error, key: "const_declarations_must_be_initialized_1155", message: "'const' declarations must be initialized" },
-        const_declarations_can_only_be_declared_inside_a_block: { code: 1156, category: ts.DiagnosticCategory.Error, key: "const_declarations_can_only_be_declared_inside_a_block_1156", message: "'const' declarations can only be declared inside a block." },
-        let_declarations_can_only_be_declared_inside_a_block: { code: 1157, category: ts.DiagnosticCategory.Error, key: "let_declarations_can_only_be_declared_inside_a_block_1157", message: "'let' declarations can only be declared inside a block." },
-        Unterminated_template_literal: { code: 1160, category: ts.DiagnosticCategory.Error, key: "Unterminated_template_literal_1160", message: "Unterminated template literal." },
-        Unterminated_regular_expression_literal: { code: 1161, category: ts.DiagnosticCategory.Error, key: "Unterminated_regular_expression_literal_1161", message: "Unterminated regular expression literal." },
-        An_object_member_cannot_be_declared_optional: { code: 1162, category: ts.DiagnosticCategory.Error, key: "An_object_member_cannot_be_declared_optional_1162", message: "An object member cannot be declared optional." },
-        A_yield_expression_is_only_allowed_in_a_generator_body: { code: 1163, category: ts.DiagnosticCategory.Error, key: "A_yield_expression_is_only_allowed_in_a_generator_body_1163", message: "A 'yield' expression is only allowed in a generator body." },
-        Computed_property_names_are_not_allowed_in_enums: { code: 1164, category: ts.DiagnosticCategory.Error, key: "Computed_property_names_are_not_allowed_in_enums_1164", message: "Computed property names are not allowed in enums." },
-        A_computed_property_name_in_an_ambient_context_must_directly_refer_to_a_built_in_symbol: { code: 1165, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_an_ambient_context_must_directly_refer_to_a_built_in_symbol_1165", message: "A computed property name in an ambient context must directly refer to a built-in symbol." },
-        A_computed_property_name_in_a_class_property_declaration_must_directly_refer_to_a_built_in_symbol: { code: 1166, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_a_class_property_declaration_must_directly_refer_to_a_built_in_symbol_1166", message: "A computed property name in a class property declaration must directly refer to a built-in symbol." },
-        A_computed_property_name_in_a_method_overload_must_directly_refer_to_a_built_in_symbol: { code: 1168, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_a_method_overload_must_directly_refer_to_a_built_in_symbol_1168", message: "A computed property name in a method overload must directly refer to a built-in symbol." },
-        A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol: { code: 1169, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol_1169", message: "A computed property name in an interface must directly refer to a built-in symbol." },
-        A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol: { code: 1170, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol_1170", message: "A computed property name in a type literal must directly refer to a built-in symbol." },
-        A_comma_expression_is_not_allowed_in_a_computed_property_name: { code: 1171, category: ts.DiagnosticCategory.Error, key: "A_comma_expression_is_not_allowed_in_a_computed_property_name_1171", message: "A comma expression is not allowed in a computed property name." },
-        extends_clause_already_seen: { code: 1172, category: ts.DiagnosticCategory.Error, key: "extends_clause_already_seen_1172", message: "'extends' clause already seen." },
-        extends_clause_must_precede_implements_clause: { code: 1173, category: ts.DiagnosticCategory.Error, key: "extends_clause_must_precede_implements_clause_1173", message: "'extends' clause must precede 'implements' clause." },
-        Classes_can_only_extend_a_single_class: { code: 1174, category: ts.DiagnosticCategory.Error, key: "Classes_can_only_extend_a_single_class_1174", message: "Classes can only extend a single class." },
-        implements_clause_already_seen: { code: 1175, category: ts.DiagnosticCategory.Error, key: "implements_clause_already_seen_1175", message: "'implements' clause already seen." },
-        Interface_declaration_cannot_have_implements_clause: { code: 1176, category: ts.DiagnosticCategory.Error, key: "Interface_declaration_cannot_have_implements_clause_1176", message: "Interface declaration cannot have 'implements' clause." },
-        Binary_digit_expected: { code: 1177, category: ts.DiagnosticCategory.Error, key: "Binary_digit_expected_1177", message: "Binary digit expected." },
-        Octal_digit_expected: { code: 1178, category: ts.DiagnosticCategory.Error, key: "Octal_digit_expected_1178", message: "Octal digit expected." },
-        Unexpected_token_expected: { code: 1179, category: ts.DiagnosticCategory.Error, key: "Unexpected_token_expected_1179", message: "Unexpected token. '{' expected." },
-        Property_destructuring_pattern_expected: { code: 1180, category: ts.DiagnosticCategory.Error, key: "Property_destructuring_pattern_expected_1180", message: "Property destructuring pattern expected." },
-        Array_element_destructuring_pattern_expected: { code: 1181, category: ts.DiagnosticCategory.Error, key: "Array_element_destructuring_pattern_expected_1181", message: "Array element destructuring pattern expected." },
-        A_destructuring_declaration_must_have_an_initializer: { code: 1182, category: ts.DiagnosticCategory.Error, key: "A_destructuring_declaration_must_have_an_initializer_1182", message: "A destructuring declaration must have an initializer." },
-        An_implementation_cannot_be_declared_in_ambient_contexts: { code: 1183, category: ts.DiagnosticCategory.Error, key: "An_implementation_cannot_be_declared_in_ambient_contexts_1183", message: "An implementation cannot be declared in ambient contexts." },
-        Modifiers_cannot_appear_here: { code: 1184, category: ts.DiagnosticCategory.Error, key: "Modifiers_cannot_appear_here_1184", message: "Modifiers cannot appear here." },
-        Merge_conflict_marker_encountered: { code: 1185, category: ts.DiagnosticCategory.Error, key: "Merge_conflict_marker_encountered_1185", message: "Merge conflict marker encountered." },
-        A_rest_element_cannot_have_an_initializer: { code: 1186, category: ts.DiagnosticCategory.Error, key: "A_rest_element_cannot_have_an_initializer_1186", message: "A rest element cannot have an initializer." },
-        A_parameter_property_may_not_be_declared_using_a_binding_pattern: { code: 1187, category: ts.DiagnosticCategory.Error, key: "A_parameter_property_may_not_be_declared_using_a_binding_pattern_1187", message: "A parameter property may not be declared using a binding pattern." },
-        Only_a_single_variable_declaration_is_allowed_in_a_for_of_statement: { code: 1188, category: ts.DiagnosticCategory.Error, key: "Only_a_single_variable_declaration_is_allowed_in_a_for_of_statement_1188", message: "Only a single variable declaration is allowed in a 'for...of' statement." },
-        The_variable_declaration_of_a_for_in_statement_cannot_have_an_initializer: { code: 1189, category: ts.DiagnosticCategory.Error, key: "The_variable_declaration_of_a_for_in_statement_cannot_have_an_initializer_1189", message: "The variable declaration of a 'for...in' statement cannot have an initializer." },
-        The_variable_declaration_of_a_for_of_statement_cannot_have_an_initializer: { code: 1190, category: ts.DiagnosticCategory.Error, key: "The_variable_declaration_of_a_for_of_statement_cannot_have_an_initializer_1190", message: "The variable declaration of a 'for...of' statement cannot have an initializer." },
-        An_import_declaration_cannot_have_modifiers: { code: 1191, category: ts.DiagnosticCategory.Error, key: "An_import_declaration_cannot_have_modifiers_1191", message: "An import declaration cannot have modifiers." },
-        Module_0_has_no_default_export: { code: 1192, category: ts.DiagnosticCategory.Error, key: "Module_0_has_no_default_export_1192", message: "Module '{0}' has no default export." },
-        An_export_declaration_cannot_have_modifiers: { code: 1193, category: ts.DiagnosticCategory.Error, key: "An_export_declaration_cannot_have_modifiers_1193", message: "An export declaration cannot have modifiers." },
-        Export_declarations_are_not_permitted_in_a_namespace: { code: 1194, category: ts.DiagnosticCategory.Error, key: "Export_declarations_are_not_permitted_in_a_namespace_1194", message: "Export declarations are not permitted in a namespace." },
-        Catch_clause_variable_name_must_be_an_identifier: { code: 1195, category: ts.DiagnosticCategory.Error, key: "Catch_clause_variable_name_must_be_an_identifier_1195", message: "Catch clause variable name must be an identifier." },
-        Catch_clause_variable_cannot_have_a_type_annotation: { code: 1196, category: ts.DiagnosticCategory.Error, key: "Catch_clause_variable_cannot_have_a_type_annotation_1196", message: "Catch clause variable cannot have a type annotation." },
-        Catch_clause_variable_cannot_have_an_initializer: { code: 1197, category: ts.DiagnosticCategory.Error, key: "Catch_clause_variable_cannot_have_an_initializer_1197", message: "Catch clause variable cannot have an initializer." },
-        An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive: { code: 1198, category: ts.DiagnosticCategory.Error, key: "An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive_1198", message: "An extended Unicode escape value must be between 0x0 and 0x10FFFF inclusive." },
-        Unterminated_Unicode_escape_sequence: { code: 1199, category: ts.DiagnosticCategory.Error, key: "Unterminated_Unicode_escape_sequence_1199", message: "Unterminated Unicode escape sequence." },
-        Line_terminator_not_permitted_before_arrow: { code: 1200, category: ts.DiagnosticCategory.Error, key: "Line_terminator_not_permitted_before_arrow_1200", message: "Line terminator not permitted before arrow." },
-        Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead: { code: 1202, category: ts.DiagnosticCategory.Error, key: "Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asteri_1202", message: "Import assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'import * as ns from \"mod\"', 'import {a} from \"mod\"', 'import d from \"mod\"', or another module format instead." },
-        Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_or_another_module_format_instead: { code: 1203, category: ts.DiagnosticCategory.Error, key: "Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_defaul_1203", message: "Export assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'export default' or another module format instead." },
-        Decorators_are_not_valid_here: { code: 1206, category: ts.DiagnosticCategory.Error, key: "Decorators_are_not_valid_here_1206", message: "Decorators are not valid here." },
-        Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name: { code: 1207, category: ts.DiagnosticCategory.Error, key: "Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name_1207", message: "Decorators cannot be applied to multiple get/set accessors of the same name." },
-        Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided: { code: 1208, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided_1208", message: "Cannot compile namespaces when the '--isolatedModules' flag is provided." },
-        Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided: { code: 1209, category: ts.DiagnosticCategory.Error, key: "Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided_1209", message: "Ambient const enums are not allowed when the '--isolatedModules' flag is provided." },
-        Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode: { code: 1210, category: ts.DiagnosticCategory.Error, key: "Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode_1210", message: "Invalid use of '{0}'. Class definitions are automatically in strict mode." },
-        A_class_declaration_without_the_default_modifier_must_have_a_name: { code: 1211, category: ts.DiagnosticCategory.Error, key: "A_class_declaration_without_the_default_modifier_must_have_a_name_1211", message: "A class declaration without the 'default' modifier must have a name" },
-        Identifier_expected_0_is_a_reserved_word_in_strict_mode: { code: 1212, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_0_is_a_reserved_word_in_strict_mode_1212", message: "Identifier expected. '{0}' is a reserved word in strict mode" },
-        Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_strict_mode: { code: 1213, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_stric_1213", message: "Identifier expected. '{0}' is a reserved word in strict mode. Class definitions are automatically in strict mode." },
-        Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode: { code: 1214, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode_1214", message: "Identifier expected. '{0}' is a reserved word in strict mode. Modules are automatically in strict mode." },
-        Invalid_use_of_0_Modules_are_automatically_in_strict_mode: { code: 1215, category: ts.DiagnosticCategory.Error, key: "Invalid_use_of_0_Modules_are_automatically_in_strict_mode_1215", message: "Invalid use of '{0}'. Modules are automatically in strict mode." },
-        Export_assignment_is_not_supported_when_module_flag_is_system: { code: 1218, category: ts.DiagnosticCategory.Error, key: "Export_assignment_is_not_supported_when_module_flag_is_system_1218", message: "Export assignment is not supported when '--module' flag is 'system'." },
-        Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning: { code: 1219, category: ts.DiagnosticCategory.Error, key: "Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_t_1219", message: "Experimental support for decorators is a feature that is subject to change in a future release. Set the 'experimentalDecorators' option to remove this warning." },
-        Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher: { code: 1220, category: ts.DiagnosticCategory.Error, key: "Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher_1220", message: "Generators are only available when targeting ECMAScript 2015 or higher." },
-        Generators_are_not_allowed_in_an_ambient_context: { code: 1221, category: ts.DiagnosticCategory.Error, key: "Generators_are_not_allowed_in_an_ambient_context_1221", message: "Generators are not allowed in an ambient context." },
-        An_overload_signature_cannot_be_declared_as_a_generator: { code: 1222, category: ts.DiagnosticCategory.Error, key: "An_overload_signature_cannot_be_declared_as_a_generator_1222", message: "An overload signature cannot be declared as a generator." },
-        _0_tag_already_specified: { code: 1223, category: ts.DiagnosticCategory.Error, key: "_0_tag_already_specified_1223", message: "'{0}' tag already specified." },
-        Signature_0_must_have_a_type_predicate: { code: 1224, category: ts.DiagnosticCategory.Error, key: "Signature_0_must_have_a_type_predicate_1224", message: "Signature '{0}' must have a type predicate." },
-        Cannot_find_parameter_0: { code: 1225, category: ts.DiagnosticCategory.Error, key: "Cannot_find_parameter_0_1225", message: "Cannot find parameter '{0}'." },
-        Type_predicate_0_is_not_assignable_to_1: { code: 1226, category: ts.DiagnosticCategory.Error, key: "Type_predicate_0_is_not_assignable_to_1_1226", message: "Type predicate '{0}' is not assignable to '{1}'." },
-        Parameter_0_is_not_in_the_same_position_as_parameter_1: { code: 1227, category: ts.DiagnosticCategory.Error, key: "Parameter_0_is_not_in_the_same_position_as_parameter_1_1227", message: "Parameter '{0}' is not in the same position as parameter '{1}'." },
-        A_type_predicate_is_only_allowed_in_return_type_position_for_functions_and_methods: { code: 1228, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_is_only_allowed_in_return_type_position_for_functions_and_methods_1228", message: "A type predicate is only allowed in return type position for functions and methods." },
-        A_type_predicate_cannot_reference_a_rest_parameter: { code: 1229, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_cannot_reference_a_rest_parameter_1229", message: "A type predicate cannot reference a rest parameter." },
-        A_type_predicate_cannot_reference_element_0_in_a_binding_pattern: { code: 1230, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_cannot_reference_element_0_in_a_binding_pattern_1230", message: "A type predicate cannot reference element '{0}' in a binding pattern." },
-        An_export_assignment_can_only_be_used_in_a_module: { code: 1231, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_can_only_be_used_in_a_module_1231", message: "An export assignment can only be used in a module." },
-        An_import_declaration_can_only_be_used_in_a_namespace_or_module: { code: 1232, category: ts.DiagnosticCategory.Error, key: "An_import_declaration_can_only_be_used_in_a_namespace_or_module_1232", message: "An import declaration can only be used in a namespace or module." },
-        An_export_declaration_can_only_be_used_in_a_module: { code: 1233, category: ts.DiagnosticCategory.Error, key: "An_export_declaration_can_only_be_used_in_a_module_1233", message: "An export declaration can only be used in a module." },
-        An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file: { code: 1234, category: ts.DiagnosticCategory.Error, key: "An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file_1234", message: "An ambient module declaration is only allowed at the top level in a file." },
-        A_namespace_declaration_is_only_allowed_in_a_namespace_or_module: { code: 1235, category: ts.DiagnosticCategory.Error, key: "A_namespace_declaration_is_only_allowed_in_a_namespace_or_module_1235", message: "A namespace declaration is only allowed in a namespace or module." },
-        The_return_type_of_a_property_decorator_function_must_be_either_void_or_any: { code: 1236, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_a_property_decorator_function_must_be_either_void_or_any_1236", message: "The return type of a property decorator function must be either 'void' or 'any'." },
-        The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any: { code: 1237, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any_1237", message: "The return type of a parameter decorator function must be either 'void' or 'any'." },
-        Unable_to_resolve_signature_of_class_decorator_when_called_as_an_expression: { code: 1238, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_class_decorator_when_called_as_an_expression_1238", message: "Unable to resolve signature of class decorator when called as an expression." },
-        Unable_to_resolve_signature_of_parameter_decorator_when_called_as_an_expression: { code: 1239, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_parameter_decorator_when_called_as_an_expression_1239", message: "Unable to resolve signature of parameter decorator when called as an expression." },
-        Unable_to_resolve_signature_of_property_decorator_when_called_as_an_expression: { code: 1240, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_property_decorator_when_called_as_an_expression_1240", message: "Unable to resolve signature of property decorator when called as an expression." },
-        Unable_to_resolve_signature_of_method_decorator_when_called_as_an_expression: { code: 1241, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_method_decorator_when_called_as_an_expression_1241", message: "Unable to resolve signature of method decorator when called as an expression." },
-        abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration: { code: 1242, category: ts.DiagnosticCategory.Error, key: "abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration_1242", message: "'abstract' modifier can only appear on a class, method, or property declaration." },
-        _0_modifier_cannot_be_used_with_1_modifier: { code: 1243, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_with_1_modifier_1243", message: "'{0}' modifier cannot be used with '{1}' modifier." },
-        Abstract_methods_can_only_appear_within_an_abstract_class: { code: 1244, category: ts.DiagnosticCategory.Error, key: "Abstract_methods_can_only_appear_within_an_abstract_class_1244", message: "Abstract methods can only appear within an abstract class." },
-        Method_0_cannot_have_an_implementation_because_it_is_marked_abstract: { code: 1245, category: ts.DiagnosticCategory.Error, key: "Method_0_cannot_have_an_implementation_because_it_is_marked_abstract_1245", message: "Method '{0}' cannot have an implementation because it is marked abstract." },
-        An_interface_property_cannot_have_an_initializer: { code: 1246, category: ts.DiagnosticCategory.Error, key: "An_interface_property_cannot_have_an_initializer_1246", message: "An interface property cannot have an initializer." },
-        A_type_literal_property_cannot_have_an_initializer: { code: 1247, category: ts.DiagnosticCategory.Error, key: "A_type_literal_property_cannot_have_an_initializer_1247", message: "A type literal property cannot have an initializer." },
-        A_class_member_cannot_have_the_0_keyword: { code: 1248, category: ts.DiagnosticCategory.Error, key: "A_class_member_cannot_have_the_0_keyword_1248", message: "A class member cannot have the '{0}' keyword." },
-        A_decorator_can_only_decorate_a_method_implementation_not_an_overload: { code: 1249, category: ts.DiagnosticCategory.Error, key: "A_decorator_can_only_decorate_a_method_implementation_not_an_overload_1249", message: "A decorator can only decorate a method implementation, not an overload." },
-        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5: { code: 1250, category: ts.DiagnosticCategory.Error, key: "Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_1250", message: "Function declarations are not allowed inside blocks in strict mode when targeting 'ES3' or 'ES5'." },
-        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Class_definitions_are_automatically_in_strict_mode: { code: 1251, category: ts.DiagnosticCategory.Error, key: "Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Class_d_1251", message: "Function declarations are not allowed inside blocks in strict mode when targeting 'ES3' or 'ES5'. Class definitions are automatically in strict mode." },
-        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_are_automatically_in_strict_mode: { code: 1252, category: ts.DiagnosticCategory.Error, key: "Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_1252", message: "Function declarations are not allowed inside blocks in strict mode when targeting 'ES3' or 'ES5'. Modules are automatically in strict mode." },
-        _0_tag_cannot_be_used_independently_as_a_top_level_JSDoc_tag: { code: 1253, category: ts.DiagnosticCategory.Error, key: "_0_tag_cannot_be_used_independently_as_a_top_level_JSDoc_tag_1253", message: "'{0}' tag cannot be used independently as a top level JSDoc tag." },
-        A_const_initializer_in_an_ambient_context_must_be_a_string_or_numeric_literal: { code: 1254, category: ts.DiagnosticCategory.Error, key: "A_const_initializer_in_an_ambient_context_must_be_a_string_or_numeric_literal_1254", message: "A 'const' initializer in an ambient context must be a string or numeric literal." },
-        with_statements_are_not_allowed_in_an_async_function_block: { code: 1300, category: ts.DiagnosticCategory.Error, key: "with_statements_are_not_allowed_in_an_async_function_block_1300", message: "'with' statements are not allowed in an async function block." },
-        await_expression_is_only_allowed_within_an_async_function: { code: 1308, category: ts.DiagnosticCategory.Error, key: "await_expression_is_only_allowed_within_an_async_function_1308", message: "'await' expression is only allowed within an async function." },
-        can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment: { code: 1312, category: ts.DiagnosticCategory.Error, key: "can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment_1312", message: "'=' can only be used in an object literal property inside a destructuring assignment." },
-        The_body_of_an_if_statement_cannot_be_the_empty_statement: { code: 1313, category: ts.DiagnosticCategory.Error, key: "The_body_of_an_if_statement_cannot_be_the_empty_statement_1313", message: "The body of an 'if' statement cannot be the empty statement." },
-        Global_module_exports_may_only_appear_in_module_files: { code: 1314, category: ts.DiagnosticCategory.Error, key: "Global_module_exports_may_only_appear_in_module_files_1314", message: "Global module exports may only appear in module files." },
-        Global_module_exports_may_only_appear_in_declaration_files: { code: 1315, category: ts.DiagnosticCategory.Error, key: "Global_module_exports_may_only_appear_in_declaration_files_1315", message: "Global module exports may only appear in declaration files." },
-        Global_module_exports_may_only_appear_at_top_level: { code: 1316, category: ts.DiagnosticCategory.Error, key: "Global_module_exports_may_only_appear_at_top_level_1316", message: "Global module exports may only appear at top level." },
-        A_parameter_property_cannot_be_declared_using_a_rest_parameter: { code: 1317, category: ts.DiagnosticCategory.Error, key: "A_parameter_property_cannot_be_declared_using_a_rest_parameter_1317", message: "A parameter property cannot be declared using a rest parameter." },
-        Duplicate_identifier_0: { code: 2300, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_2300", message: "Duplicate identifier '{0}'." },
-        Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor: { code: 2301, category: ts.DiagnosticCategory.Error, key: "Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor_2301", message: "Initializer of instance member variable '{0}' cannot reference identifier '{1}' declared in the constructor." },
-        Static_members_cannot_reference_class_type_parameters: { code: 2302, category: ts.DiagnosticCategory.Error, key: "Static_members_cannot_reference_class_type_parameters_2302", message: "Static members cannot reference class type parameters." },
-        Circular_definition_of_import_alias_0: { code: 2303, category: ts.DiagnosticCategory.Error, key: "Circular_definition_of_import_alias_0_2303", message: "Circular definition of import alias '{0}'." },
-        Cannot_find_name_0: { code: 2304, category: ts.DiagnosticCategory.Error, key: "Cannot_find_name_0_2304", message: "Cannot find name '{0}'." },
-        Module_0_has_no_exported_member_1: { code: 2305, category: ts.DiagnosticCategory.Error, key: "Module_0_has_no_exported_member_1_2305", message: "Module '{0}' has no exported member '{1}'." },
-        File_0_is_not_a_module: { code: 2306, category: ts.DiagnosticCategory.Error, key: "File_0_is_not_a_module_2306", message: "File '{0}' is not a module." },
-        Cannot_find_module_0: { code: 2307, category: ts.DiagnosticCategory.Error, key: "Cannot_find_module_0_2307", message: "Cannot find module '{0}'." },
-        Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambiguity: { code: 2308, category: ts.DiagnosticCategory.Error, key: "Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambig_2308", message: "Module {0} has already exported a member named '{1}'. Consider explicitly re-exporting to resolve the ambiguity." },
-        An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements: { code: 2309, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements_2309", message: "An export assignment cannot be used in a module with other exported elements." },
-        Type_0_recursively_references_itself_as_a_base_type: { code: 2310, category: ts.DiagnosticCategory.Error, key: "Type_0_recursively_references_itself_as_a_base_type_2310", message: "Type '{0}' recursively references itself as a base type." },
-        A_class_may_only_extend_another_class: { code: 2311, category: ts.DiagnosticCategory.Error, key: "A_class_may_only_extend_another_class_2311", message: "A class may only extend another class." },
-        An_interface_may_only_extend_a_class_or_another_interface: { code: 2312, category: ts.DiagnosticCategory.Error, key: "An_interface_may_only_extend_a_class_or_another_interface_2312", message: "An interface may only extend a class or another interface." },
-        Type_parameter_0_has_a_circular_constraint: { code: 2313, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_has_a_circular_constraint_2313", message: "Type parameter '{0}' has a circular constraint." },
-        Generic_type_0_requires_1_type_argument_s: { code: 2314, category: ts.DiagnosticCategory.Error, key: "Generic_type_0_requires_1_type_argument_s_2314", message: "Generic type '{0}' requires {1} type argument(s)." },
-        Type_0_is_not_generic: { code: 2315, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_generic_2315", message: "Type '{0}' is not generic." },
-        Global_type_0_must_be_a_class_or_interface_type: { code: 2316, category: ts.DiagnosticCategory.Error, key: "Global_type_0_must_be_a_class_or_interface_type_2316", message: "Global type '{0}' must be a class or interface type." },
-        Global_type_0_must_have_1_type_parameter_s: { code: 2317, category: ts.DiagnosticCategory.Error, key: "Global_type_0_must_have_1_type_parameter_s_2317", message: "Global type '{0}' must have {1} type parameter(s)." },
-        Cannot_find_global_type_0: { code: 2318, category: ts.DiagnosticCategory.Error, key: "Cannot_find_global_type_0_2318", message: "Cannot find global type '{0}'." },
-        Named_property_0_of_types_1_and_2_are_not_identical: { code: 2319, category: ts.DiagnosticCategory.Error, key: "Named_property_0_of_types_1_and_2_are_not_identical_2319", message: "Named property '{0}' of types '{1}' and '{2}' are not identical." },
-        Interface_0_cannot_simultaneously_extend_types_1_and_2: { code: 2320, category: ts.DiagnosticCategory.Error, key: "Interface_0_cannot_simultaneously_extend_types_1_and_2_2320", message: "Interface '{0}' cannot simultaneously extend types '{1}' and '{2}'." },
-        Excessive_stack_depth_comparing_types_0_and_1: { code: 2321, category: ts.DiagnosticCategory.Error, key: "Excessive_stack_depth_comparing_types_0_and_1_2321", message: "Excessive stack depth comparing types '{0}' and '{1}'." },
-        Type_0_is_not_assignable_to_type_1: { code: 2322, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_assignable_to_type_1_2322", message: "Type '{0}' is not assignable to type '{1}'." },
-        Cannot_redeclare_exported_variable_0: { code: 2323, category: ts.DiagnosticCategory.Error, key: "Cannot_redeclare_exported_variable_0_2323", message: "Cannot redeclare exported variable '{0}'." },
-        Property_0_is_missing_in_type_1: { code: 2324, category: ts.DiagnosticCategory.Error, key: "Property_0_is_missing_in_type_1_2324", message: "Property '{0}' is missing in type '{1}'." },
-        Property_0_is_private_in_type_1_but_not_in_type_2: { code: 2325, category: ts.DiagnosticCategory.Error, key: "Property_0_is_private_in_type_1_but_not_in_type_2_2325", message: "Property '{0}' is private in type '{1}' but not in type '{2}'." },
-        Types_of_property_0_are_incompatible: { code: 2326, category: ts.DiagnosticCategory.Error, key: "Types_of_property_0_are_incompatible_2326", message: "Types of property '{0}' are incompatible." },
-        Property_0_is_optional_in_type_1_but_required_in_type_2: { code: 2327, category: ts.DiagnosticCategory.Error, key: "Property_0_is_optional_in_type_1_but_required_in_type_2_2327", message: "Property '{0}' is optional in type '{1}' but required in type '{2}'." },
-        Types_of_parameters_0_and_1_are_incompatible: { code: 2328, category: ts.DiagnosticCategory.Error, key: "Types_of_parameters_0_and_1_are_incompatible_2328", message: "Types of parameters '{0}' and '{1}' are incompatible." },
-        Index_signature_is_missing_in_type_0: { code: 2329, category: ts.DiagnosticCategory.Error, key: "Index_signature_is_missing_in_type_0_2329", message: "Index signature is missing in type '{0}'." },
-        Index_signatures_are_incompatible: { code: 2330, category: ts.DiagnosticCategory.Error, key: "Index_signatures_are_incompatible_2330", message: "Index signatures are incompatible." },
-        this_cannot_be_referenced_in_a_module_or_namespace_body: { code: 2331, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_a_module_or_namespace_body_2331", message: "'this' cannot be referenced in a module or namespace body." },
-        this_cannot_be_referenced_in_current_location: { code: 2332, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_current_location_2332", message: "'this' cannot be referenced in current location." },
-        this_cannot_be_referenced_in_constructor_arguments: { code: 2333, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_constructor_arguments_2333", message: "'this' cannot be referenced in constructor arguments." },
-        this_cannot_be_referenced_in_a_static_property_initializer: { code: 2334, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_a_static_property_initializer_2334", message: "'this' cannot be referenced in a static property initializer." },
-        super_can_only_be_referenced_in_a_derived_class: { code: 2335, category: ts.DiagnosticCategory.Error, key: "super_can_only_be_referenced_in_a_derived_class_2335", message: "'super' can only be referenced in a derived class." },
-        super_cannot_be_referenced_in_constructor_arguments: { code: 2336, category: ts.DiagnosticCategory.Error, key: "super_cannot_be_referenced_in_constructor_arguments_2336", message: "'super' cannot be referenced in constructor arguments." },
-        Super_calls_are_not_permitted_outside_constructors_or_in_nested_functions_inside_constructors: { code: 2337, category: ts.DiagnosticCategory.Error, key: "Super_calls_are_not_permitted_outside_constructors_or_in_nested_functions_inside_constructors_2337", message: "Super calls are not permitted outside constructors or in nested functions inside constructors." },
-        super_property_access_is_permitted_only_in_a_constructor_member_function_or_member_accessor_of_a_derived_class: { code: 2338, category: ts.DiagnosticCategory.Error, key: "super_property_access_is_permitted_only_in_a_constructor_member_function_or_member_accessor_of_a_der_2338", message: "'super' property access is permitted only in a constructor, member function, or member accessor of a derived class." },
-        Property_0_does_not_exist_on_type_1: { code: 2339, category: ts.DiagnosticCategory.Error, key: "Property_0_does_not_exist_on_type_1_2339", message: "Property '{0}' does not exist on type '{1}'." },
-        Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword: { code: 2340, category: ts.DiagnosticCategory.Error, key: "Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword_2340", message: "Only public and protected methods of the base class are accessible via the 'super' keyword." },
-        Property_0_is_private_and_only_accessible_within_class_1: { code: 2341, category: ts.DiagnosticCategory.Error, key: "Property_0_is_private_and_only_accessible_within_class_1_2341", message: "Property '{0}' is private and only accessible within class '{1}'." },
-        An_index_expression_argument_must_be_of_type_string_number_symbol_or_any: { code: 2342, category: ts.DiagnosticCategory.Error, key: "An_index_expression_argument_must_be_of_type_string_number_symbol_or_any_2342", message: "An index expression argument must be of type 'string', 'number', 'symbol', or 'any'." },
-        Type_0_does_not_satisfy_the_constraint_1: { code: 2344, category: ts.DiagnosticCategory.Error, key: "Type_0_does_not_satisfy_the_constraint_1_2344", message: "Type '{0}' does not satisfy the constraint '{1}'." },
-        Argument_of_type_0_is_not_assignable_to_parameter_of_type_1: { code: 2345, category: ts.DiagnosticCategory.Error, key: "Argument_of_type_0_is_not_assignable_to_parameter_of_type_1_2345", message: "Argument of type '{0}' is not assignable to parameter of type '{1}'." },
-        Supplied_parameters_do_not_match_any_signature_of_call_target: { code: 2346, category: ts.DiagnosticCategory.Error, key: "Supplied_parameters_do_not_match_any_signature_of_call_target_2346", message: "Supplied parameters do not match any signature of call target." },
-        Untyped_function_calls_may_not_accept_type_arguments: { code: 2347, category: ts.DiagnosticCategory.Error, key: "Untyped_function_calls_may_not_accept_type_arguments_2347", message: "Untyped function calls may not accept type arguments." },
-        Value_of_type_0_is_not_callable_Did_you_mean_to_include_new: { code: 2348, category: ts.DiagnosticCategory.Error, key: "Value_of_type_0_is_not_callable_Did_you_mean_to_include_new_2348", message: "Value of type '{0}' is not callable. Did you mean to include 'new'?" },
-        Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures: { code: 2349, category: ts.DiagnosticCategory.Error, key: "Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatur_2349", message: "Cannot invoke an expression whose type lacks a call signature. Type '{0}' has no compatible call signatures." },
-        Only_a_void_function_can_be_called_with_the_new_keyword: { code: 2350, category: ts.DiagnosticCategory.Error, key: "Only_a_void_function_can_be_called_with_the_new_keyword_2350", message: "Only a void function can be called with the 'new' keyword." },
-        Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature: { code: 2351, category: ts.DiagnosticCategory.Error, key: "Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature_2351", message: "Cannot use 'new' with an expression whose type lacks a call or construct signature." },
-        Type_0_cannot_be_converted_to_type_1: { code: 2352, category: ts.DiagnosticCategory.Error, key: "Type_0_cannot_be_converted_to_type_1_2352", message: "Type '{0}' cannot be converted to type '{1}'." },
-        Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1: { code: 2353, category: ts.DiagnosticCategory.Error, key: "Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1_2353", message: "Object literal may only specify known properties, and '{0}' does not exist in type '{1}'." },
-        A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value: { code: 2355, category: ts.DiagnosticCategory.Error, key: "A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value_2355", message: "A function whose declared type is neither 'void' nor 'any' must return a value." },
-        An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type: { code: 2356, category: ts.DiagnosticCategory.Error, key: "An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type_2356", message: "An arithmetic operand must be of type 'any', 'number' or an enum type." },
-        The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer: { code: 2357, category: ts.DiagnosticCategory.Error, key: "The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer_2357", message: "The operand of an increment or decrement operator must be a variable, property or indexer." },
-        The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_parameter: { code: 2358, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_paramete_2358", message: "The left-hand side of an 'instanceof' expression must be of type 'any', an object type or a type parameter." },
-        The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_Function_interface_type: { code: 2359, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_F_2359", message: "The right-hand side of an 'instanceof' expression must be of type 'any' or of a type assignable to the 'Function' interface type." },
-        The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol: { code: 2360, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol_2360", message: "The left-hand side of an 'in' expression must be of type 'any', 'string', 'number', or 'symbol'." },
-        The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter: { code: 2361, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter_2361", message: "The right-hand side of an 'in' expression must be of type 'any', an object type or a type parameter" },
-        The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type: { code: 2362, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type_2362", message: "The left-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type." },
-        The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type: { code: 2363, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type_2363", message: "The right-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type." },
-        Invalid_left_hand_side_of_assignment_expression: { code: 2364, category: ts.DiagnosticCategory.Error, key: "Invalid_left_hand_side_of_assignment_expression_2364", message: "Invalid left-hand side of assignment expression." },
-        Operator_0_cannot_be_applied_to_types_1_and_2: { code: 2365, category: ts.DiagnosticCategory.Error, key: "Operator_0_cannot_be_applied_to_types_1_and_2_2365", message: "Operator '{0}' cannot be applied to types '{1}' and '{2}'." },
-        Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined: { code: 2366, category: ts.DiagnosticCategory.Error, key: "Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined_2366", message: "Function lacks ending return statement and return type does not include 'undefined'." },
-        Type_parameter_name_cannot_be_0: { code: 2368, category: ts.DiagnosticCategory.Error, key: "Type_parameter_name_cannot_be_0_2368", message: "Type parameter name cannot be '{0}'" },
-        A_parameter_property_is_only_allowed_in_a_constructor_implementation: { code: 2369, category: ts.DiagnosticCategory.Error, key: "A_parameter_property_is_only_allowed_in_a_constructor_implementation_2369", message: "A parameter property is only allowed in a constructor implementation." },
-        A_rest_parameter_must_be_of_an_array_type: { code: 2370, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_must_be_of_an_array_type_2370", message: "A rest parameter must be of an array type." },
-        A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation: { code: 2371, category: ts.DiagnosticCategory.Error, key: "A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation_2371", message: "A parameter initializer is only allowed in a function or constructor implementation." },
-        Parameter_0_cannot_be_referenced_in_its_initializer: { code: 2372, category: ts.DiagnosticCategory.Error, key: "Parameter_0_cannot_be_referenced_in_its_initializer_2372", message: "Parameter '{0}' cannot be referenced in its initializer." },
-        Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it: { code: 2373, category: ts.DiagnosticCategory.Error, key: "Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it_2373", message: "Initializer of parameter '{0}' cannot reference identifier '{1}' declared after it." },
-        Duplicate_string_index_signature: { code: 2374, category: ts.DiagnosticCategory.Error, key: "Duplicate_string_index_signature_2374", message: "Duplicate string index signature." },
-        Duplicate_number_index_signature: { code: 2375, category: ts.DiagnosticCategory.Error, key: "Duplicate_number_index_signature_2375", message: "Duplicate number index signature." },
-        A_super_call_must_be_the_first_statement_in_the_constructor_when_a_class_contains_initialized_properties_or_has_parameter_properties: { code: 2376, category: ts.DiagnosticCategory.Error, key: "A_super_call_must_be_the_first_statement_in_the_constructor_when_a_class_contains_initialized_proper_2376", message: "A 'super' call must be the first statement in the constructor when a class contains initialized properties or has parameter properties." },
-        Constructors_for_derived_classes_must_contain_a_super_call: { code: 2377, category: ts.DiagnosticCategory.Error, key: "Constructors_for_derived_classes_must_contain_a_super_call_2377", message: "Constructors for derived classes must contain a 'super' call." },
-        A_get_accessor_must_return_a_value: { code: 2378, category: ts.DiagnosticCategory.Error, key: "A_get_accessor_must_return_a_value_2378", message: "A 'get' accessor must return a value." },
-        Getter_and_setter_accessors_do_not_agree_in_visibility: { code: 2379, category: ts.DiagnosticCategory.Error, key: "Getter_and_setter_accessors_do_not_agree_in_visibility_2379", message: "Getter and setter accessors do not agree in visibility." },
-        get_and_set_accessor_must_have_the_same_type: { code: 2380, category: ts.DiagnosticCategory.Error, key: "get_and_set_accessor_must_have_the_same_type_2380", message: "'get' and 'set' accessor must have the same type." },
-        A_signature_with_an_implementation_cannot_use_a_string_literal_type: { code: 2381, category: ts.DiagnosticCategory.Error, key: "A_signature_with_an_implementation_cannot_use_a_string_literal_type_2381", message: "A signature with an implementation cannot use a string literal type." },
-        Specialized_overload_signature_is_not_assignable_to_any_non_specialized_signature: { code: 2382, category: ts.DiagnosticCategory.Error, key: "Specialized_overload_signature_is_not_assignable_to_any_non_specialized_signature_2382", message: "Specialized overload signature is not assignable to any non-specialized signature." },
-        Overload_signatures_must_all_be_exported_or_non_exported: { code: 2383, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_exported_or_non_exported_2383", message: "Overload signatures must all be exported or non-exported." },
-        Overload_signatures_must_all_be_ambient_or_non_ambient: { code: 2384, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_ambient_or_non_ambient_2384", message: "Overload signatures must all be ambient or non-ambient." },
-        Overload_signatures_must_all_be_public_private_or_protected: { code: 2385, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_public_private_or_protected_2385", message: "Overload signatures must all be public, private or protected." },
-        Overload_signatures_must_all_be_optional_or_required: { code: 2386, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_optional_or_required_2386", message: "Overload signatures must all be optional or required." },
-        Function_overload_must_be_static: { code: 2387, category: ts.DiagnosticCategory.Error, key: "Function_overload_must_be_static_2387", message: "Function overload must be static." },
-        Function_overload_must_not_be_static: { code: 2388, category: ts.DiagnosticCategory.Error, key: "Function_overload_must_not_be_static_2388", message: "Function overload must not be static." },
-        Function_implementation_name_must_be_0: { code: 2389, category: ts.DiagnosticCategory.Error, key: "Function_implementation_name_must_be_0_2389", message: "Function implementation name must be '{0}'." },
-        Constructor_implementation_is_missing: { code: 2390, category: ts.DiagnosticCategory.Error, key: "Constructor_implementation_is_missing_2390", message: "Constructor implementation is missing." },
-        Function_implementation_is_missing_or_not_immediately_following_the_declaration: { code: 2391, category: ts.DiagnosticCategory.Error, key: "Function_implementation_is_missing_or_not_immediately_following_the_declaration_2391", message: "Function implementation is missing or not immediately following the declaration." },
-        Multiple_constructor_implementations_are_not_allowed: { code: 2392, category: ts.DiagnosticCategory.Error, key: "Multiple_constructor_implementations_are_not_allowed_2392", message: "Multiple constructor implementations are not allowed." },
-        Duplicate_function_implementation: { code: 2393, category: ts.DiagnosticCategory.Error, key: "Duplicate_function_implementation_2393", message: "Duplicate function implementation." },
-        Overload_signature_is_not_compatible_with_function_implementation: { code: 2394, category: ts.DiagnosticCategory.Error, key: "Overload_signature_is_not_compatible_with_function_implementation_2394", message: "Overload signature is not compatible with function implementation." },
-        Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local: { code: 2395, category: ts.DiagnosticCategory.Error, key: "Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local_2395", message: "Individual declarations in merged declaration '{0}' must be all exported or all local." },
-        Duplicate_identifier_arguments_Compiler_uses_arguments_to_initialize_rest_parameters: { code: 2396, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_arguments_Compiler_uses_arguments_to_initialize_rest_parameters_2396", message: "Duplicate identifier 'arguments'. Compiler uses 'arguments' to initialize rest parameters." },
-        Declaration_name_conflicts_with_built_in_global_identifier_0: { code: 2397, category: ts.DiagnosticCategory.Error, key: "Declaration_name_conflicts_with_built_in_global_identifier_0_2397", message: "Declaration name conflicts with built-in global identifier '{0}'." },
-        Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference: { code: 2399, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference_2399", message: "Duplicate identifier '_this'. Compiler uses variable declaration '_this' to capture 'this' reference." },
-        Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference: { code: 2400, category: ts.DiagnosticCategory.Error, key: "Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference_2400", message: "Expression resolves to variable declaration '_this' that compiler uses to capture 'this' reference." },
-        Duplicate_identifier_super_Compiler_uses_super_to_capture_base_class_reference: { code: 2401, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_super_Compiler_uses_super_to_capture_base_class_reference_2401", message: "Duplicate identifier '_super'. Compiler uses '_super' to capture base class reference." },
-        Expression_resolves_to_super_that_compiler_uses_to_capture_base_class_reference: { code: 2402, category: ts.DiagnosticCategory.Error, key: "Expression_resolves_to_super_that_compiler_uses_to_capture_base_class_reference_2402", message: "Expression resolves to '_super' that compiler uses to capture base class reference." },
-        Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_type_2: { code: 2403, category: ts.DiagnosticCategory.Error, key: "Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_t_2403", message: "Subsequent variable declarations must have the same type.  Variable '{0}' must be of type '{1}', but here has type '{2}'." },
-        The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation: { code: 2404, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation_2404", message: "The left-hand side of a 'for...in' statement cannot use a type annotation." },
-        The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any: { code: 2405, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any_2405", message: "The left-hand side of a 'for...in' statement must be of type 'string' or 'any'." },
-        Invalid_left_hand_side_in_for_in_statement: { code: 2406, category: ts.DiagnosticCategory.Error, key: "Invalid_left_hand_side_in_for_in_statement_2406", message: "Invalid left-hand side in 'for...in' statement." },
-        The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter: { code: 2407, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter_2407", message: "The right-hand side of a 'for...in' statement must be of type 'any', an object type or a type parameter." },
-        Setters_cannot_return_a_value: { code: 2408, category: ts.DiagnosticCategory.Error, key: "Setters_cannot_return_a_value_2408", message: "Setters cannot return a value." },
-        Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class: { code: 2409, category: ts.DiagnosticCategory.Error, key: "Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class_2409", message: "Return type of constructor signature must be assignable to the instance type of the class" },
-        The_with_statement_is_not_supported_All_symbols_in_a_with_block_will_have_type_any: { code: 2410, category: ts.DiagnosticCategory.Error, key: "The_with_statement_is_not_supported_All_symbols_in_a_with_block_will_have_type_any_2410", message: "The 'with' statement is not supported. All symbols in a 'with' block will have type 'any'." },
-        Property_0_of_type_1_is_not_assignable_to_string_index_type_2: { code: 2411, category: ts.DiagnosticCategory.Error, key: "Property_0_of_type_1_is_not_assignable_to_string_index_type_2_2411", message: "Property '{0}' of type '{1}' is not assignable to string index type '{2}'." },
-        Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2: { code: 2412, category: ts.DiagnosticCategory.Error, key: "Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2_2412", message: "Property '{0}' of type '{1}' is not assignable to numeric index type '{2}'." },
-        Numeric_index_type_0_is_not_assignable_to_string_index_type_1: { code: 2413, category: ts.DiagnosticCategory.Error, key: "Numeric_index_type_0_is_not_assignable_to_string_index_type_1_2413", message: "Numeric index type '{0}' is not assignable to string index type '{1}'." },
-        Class_name_cannot_be_0: { code: 2414, category: ts.DiagnosticCategory.Error, key: "Class_name_cannot_be_0_2414", message: "Class name cannot be '{0}'" },
-        Class_0_incorrectly_extends_base_class_1: { code: 2415, category: ts.DiagnosticCategory.Error, key: "Class_0_incorrectly_extends_base_class_1_2415", message: "Class '{0}' incorrectly extends base class '{1}'." },
-        Class_static_side_0_incorrectly_extends_base_class_static_side_1: { code: 2417, category: ts.DiagnosticCategory.Error, key: "Class_static_side_0_incorrectly_extends_base_class_static_side_1_2417", message: "Class static side '{0}' incorrectly extends base class static side '{1}'." },
-        Class_0_incorrectly_implements_interface_1: { code: 2420, category: ts.DiagnosticCategory.Error, key: "Class_0_incorrectly_implements_interface_1_2420", message: "Class '{0}' incorrectly implements interface '{1}'." },
-        A_class_may_only_implement_another_class_or_interface: { code: 2422, category: ts.DiagnosticCategory.Error, key: "A_class_may_only_implement_another_class_or_interface_2422", message: "A class may only implement another class or interface." },
-        Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_accessor: { code: 2423, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_access_2423", message: "Class '{0}' defines instance member function '{1}', but extended class '{2}' defines it as instance member accessor." },
-        Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_property: { code: 2424, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_proper_2424", message: "Class '{0}' defines instance member function '{1}', but extended class '{2}' defines it as instance member property." },
-        Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_function: { code: 2425, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_functi_2425", message: "Class '{0}' defines instance member property '{1}', but extended class '{2}' defines it as instance member function." },
-        Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_function: { code: 2426, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_functi_2426", message: "Class '{0}' defines instance member accessor '{1}', but extended class '{2}' defines it as instance member function." },
-        Interface_name_cannot_be_0: { code: 2427, category: ts.DiagnosticCategory.Error, key: "Interface_name_cannot_be_0_2427", message: "Interface name cannot be '{0}'" },
-        All_declarations_of_0_must_have_identical_type_parameters: { code: 2428, category: ts.DiagnosticCategory.Error, key: "All_declarations_of_0_must_have_identical_type_parameters_2428", message: "All declarations of '{0}' must have identical type parameters." },
-        Interface_0_incorrectly_extends_interface_1: { code: 2430, category: ts.DiagnosticCategory.Error, key: "Interface_0_incorrectly_extends_interface_1_2430", message: "Interface '{0}' incorrectly extends interface '{1}'." },
-        Enum_name_cannot_be_0: { code: 2431, category: ts.DiagnosticCategory.Error, key: "Enum_name_cannot_be_0_2431", message: "Enum name cannot be '{0}'" },
-        In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enum_element: { code: 2432, category: ts.DiagnosticCategory.Error, key: "In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enu_2432", message: "In an enum with multiple declarations, only one declaration can omit an initializer for its first enum element." },
-        A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merged: { code: 2433, category: ts.DiagnosticCategory.Error, key: "A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merg_2433", message: "A namespace declaration cannot be in a different file from a class or function with which it is merged" },
-        A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged: { code: 2434, category: ts.DiagnosticCategory.Error, key: "A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged_2434", message: "A namespace declaration cannot be located prior to a class or function with which it is merged" },
-        Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces: { code: 2435, category: ts.DiagnosticCategory.Error, key: "Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces_2435", message: "Ambient modules cannot be nested in other modules or namespaces." },
-        Ambient_module_declaration_cannot_specify_relative_module_name: { code: 2436, category: ts.DiagnosticCategory.Error, key: "Ambient_module_declaration_cannot_specify_relative_module_name_2436", message: "Ambient module declaration cannot specify relative module name." },
-        Module_0_is_hidden_by_a_local_declaration_with_the_same_name: { code: 2437, category: ts.DiagnosticCategory.Error, key: "Module_0_is_hidden_by_a_local_declaration_with_the_same_name_2437", message: "Module '{0}' is hidden by a local declaration with the same name" },
-        Import_name_cannot_be_0: { code: 2438, category: ts.DiagnosticCategory.Error, key: "Import_name_cannot_be_0_2438", message: "Import name cannot be '{0}'" },
-        Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relative_module_name: { code: 2439, category: ts.DiagnosticCategory.Error, key: "Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relati_2439", message: "Import or export declaration in an ambient module declaration cannot reference module through relative module name." },
-        Import_declaration_conflicts_with_local_declaration_of_0: { code: 2440, category: ts.DiagnosticCategory.Error, key: "Import_declaration_conflicts_with_local_declaration_of_0_2440", message: "Import declaration conflicts with local declaration of '{0}'" },
-        Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module: { code: 2441, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_2441", message: "Duplicate identifier '{0}'. Compiler reserves name '{1}' in top level scope of a module." },
-        Types_have_separate_declarations_of_a_private_property_0: { code: 2442, category: ts.DiagnosticCategory.Error, key: "Types_have_separate_declarations_of_a_private_property_0_2442", message: "Types have separate declarations of a private property '{0}'." },
-        Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2: { code: 2443, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2_2443", message: "Property '{0}' is protected but type '{1}' is not a class derived from '{2}'." },
-        Property_0_is_protected_in_type_1_but_public_in_type_2: { code: 2444, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_in_type_1_but_public_in_type_2_2444", message: "Property '{0}' is protected in type '{1}' but public in type '{2}'." },
-        Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses: { code: 2445, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses_2445", message: "Property '{0}' is protected and only accessible within class '{1}' and its subclasses." },
-        Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1: { code: 2446, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1_2446", message: "Property '{0}' is protected and only accessible through an instance of class '{1}'." },
-        The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead: { code: 2447, category: ts.DiagnosticCategory.Error, key: "The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead_2447", message: "The '{0}' operator is not allowed for boolean types. Consider using '{1}' instead." },
-        Block_scoped_variable_0_used_before_its_declaration: { code: 2448, category: ts.DiagnosticCategory.Error, key: "Block_scoped_variable_0_used_before_its_declaration_2448", message: "Block-scoped variable '{0}' used before its declaration." },
-        The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property: { code: 2449, category: ts.DiagnosticCategory.Error, key: "The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property_2449", message: "The operand of an increment or decrement operator cannot be a constant or a read-only property." },
-        Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property: { code: 2450, category: ts.DiagnosticCategory.Error, key: "Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property_2450", message: "Left-hand side of assignment expression cannot be a constant or a read-only property." },
-        Cannot_redeclare_block_scoped_variable_0: { code: 2451, category: ts.DiagnosticCategory.Error, key: "Cannot_redeclare_block_scoped_variable_0_2451", message: "Cannot redeclare block-scoped variable '{0}'." },
-        An_enum_member_cannot_have_a_numeric_name: { code: 2452, category: ts.DiagnosticCategory.Error, key: "An_enum_member_cannot_have_a_numeric_name_2452", message: "An enum member cannot have a numeric name." },
-        The_type_argument_for_type_parameter_0_cannot_be_inferred_from_the_usage_Consider_specifying_the_type_arguments_explicitly: { code: 2453, category: ts.DiagnosticCategory.Error, key: "The_type_argument_for_type_parameter_0_cannot_be_inferred_from_the_usage_Consider_specifying_the_typ_2453", message: "The type argument for type parameter '{0}' cannot be inferred from the usage. Consider specifying the type arguments explicitly." },
-        Variable_0_is_used_before_being_assigned: { code: 2454, category: ts.DiagnosticCategory.Error, key: "Variable_0_is_used_before_being_assigned_2454", message: "Variable '{0}' is used before being assigned." },
-        Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0: { code: 2455, category: ts.DiagnosticCategory.Error, key: "Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0_2455", message: "Type argument candidate '{1}' is not a valid type argument because it is not a supertype of candidate '{0}'." },
-        Type_alias_0_circularly_references_itself: { code: 2456, category: ts.DiagnosticCategory.Error, key: "Type_alias_0_circularly_references_itself_2456", message: "Type alias '{0}' circularly references itself." },
-        Type_alias_name_cannot_be_0: { code: 2457, category: ts.DiagnosticCategory.Error, key: "Type_alias_name_cannot_be_0_2457", message: "Type alias name cannot be '{0}'" },
-        An_AMD_module_cannot_have_multiple_name_assignments: { code: 2458, category: ts.DiagnosticCategory.Error, key: "An_AMD_module_cannot_have_multiple_name_assignments_2458", message: "An AMD module cannot have multiple name assignments." },
-        Type_0_has_no_property_1_and_no_string_index_signature: { code: 2459, category: ts.DiagnosticCategory.Error, key: "Type_0_has_no_property_1_and_no_string_index_signature_2459", message: "Type '{0}' has no property '{1}' and no string index signature." },
-        Type_0_has_no_property_1: { code: 2460, category: ts.DiagnosticCategory.Error, key: "Type_0_has_no_property_1_2460", message: "Type '{0}' has no property '{1}'." },
-        Type_0_is_not_an_array_type: { code: 2461, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_an_array_type_2461", message: "Type '{0}' is not an array type." },
-        A_rest_element_must_be_last_in_an_array_destructuring_pattern: { code: 2462, category: ts.DiagnosticCategory.Error, key: "A_rest_element_must_be_last_in_an_array_destructuring_pattern_2462", message: "A rest element must be last in an array destructuring pattern" },
-        A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature: { code: 2463, category: ts.DiagnosticCategory.Error, key: "A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature_2463", message: "A binding pattern parameter cannot be optional in an implementation signature." },
-        A_computed_property_name_must_be_of_type_string_number_symbol_or_any: { code: 2464, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_must_be_of_type_string_number_symbol_or_any_2464", message: "A computed property name must be of type 'string', 'number', 'symbol', or 'any'." },
-        this_cannot_be_referenced_in_a_computed_property_name: { code: 2465, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_a_computed_property_name_2465", message: "'this' cannot be referenced in a computed property name." },
-        super_cannot_be_referenced_in_a_computed_property_name: { code: 2466, category: ts.DiagnosticCategory.Error, key: "super_cannot_be_referenced_in_a_computed_property_name_2466", message: "'super' cannot be referenced in a computed property name." },
-        A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type: { code: 2467, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type_2467", message: "A computed property name cannot reference a type parameter from its containing type." },
-        Cannot_find_global_value_0: { code: 2468, category: ts.DiagnosticCategory.Error, key: "Cannot_find_global_value_0_2468", message: "Cannot find global value '{0}'." },
-        The_0_operator_cannot_be_applied_to_type_symbol: { code: 2469, category: ts.DiagnosticCategory.Error, key: "The_0_operator_cannot_be_applied_to_type_symbol_2469", message: "The '{0}' operator cannot be applied to type 'symbol'." },
-        Symbol_reference_does_not_refer_to_the_global_Symbol_constructor_object: { code: 2470, category: ts.DiagnosticCategory.Error, key: "Symbol_reference_does_not_refer_to_the_global_Symbol_constructor_object_2470", message: "'Symbol' reference does not refer to the global Symbol constructor object." },
-        A_computed_property_name_of_the_form_0_must_be_of_type_symbol: { code: 2471, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_of_the_form_0_must_be_of_type_symbol_2471", message: "A computed property name of the form '{0}' must be of type 'symbol'." },
-        Spread_operator_in_new_expressions_is_only_available_when_targeting_ECMAScript_5_and_higher: { code: 2472, category: ts.DiagnosticCategory.Error, key: "Spread_operator_in_new_expressions_is_only_available_when_targeting_ECMAScript_5_and_higher_2472", message: "Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher." },
-        Enum_declarations_must_all_be_const_or_non_const: { code: 2473, category: ts.DiagnosticCategory.Error, key: "Enum_declarations_must_all_be_const_or_non_const_2473", message: "Enum declarations must all be const or non-const." },
-        In_const_enum_declarations_member_initializer_must_be_constant_expression: { code: 2474, category: ts.DiagnosticCategory.Error, key: "In_const_enum_declarations_member_initializer_must_be_constant_expression_2474", message: "In 'const' enum declarations member initializer must be constant expression." },
-        const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_import_declaration_or_export_assignment: { code: 2475, category: ts.DiagnosticCategory.Error, key: "const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_im_2475", message: "'const' enums can only be used in property or index access expressions or the right hand side of an import declaration or export assignment." },
-        A_const_enum_member_can_only_be_accessed_using_a_string_literal: { code: 2476, category: ts.DiagnosticCategory.Error, key: "A_const_enum_member_can_only_be_accessed_using_a_string_literal_2476", message: "A const enum member can only be accessed using a string literal." },
-        const_enum_member_initializer_was_evaluated_to_a_non_finite_value: { code: 2477, category: ts.DiagnosticCategory.Error, key: "const_enum_member_initializer_was_evaluated_to_a_non_finite_value_2477", message: "'const' enum member initializer was evaluated to a non-finite value." },
-        const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN: { code: 2478, category: ts.DiagnosticCategory.Error, key: "const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN_2478", message: "'const' enum member initializer was evaluated to disallowed value 'NaN'." },
-        Property_0_does_not_exist_on_const_enum_1: { code: 2479, category: ts.DiagnosticCategory.Error, key: "Property_0_does_not_exist_on_const_enum_1_2479", message: "Property '{0}' does not exist on 'const' enum '{1}'." },
-        let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations: { code: 2480, category: ts.DiagnosticCategory.Error, key: "let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations_2480", message: "'let' is not allowed to be used as a name in 'let' or 'const' declarations." },
-        Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1: { code: 2481, category: ts.DiagnosticCategory.Error, key: "Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1_2481", message: "Cannot initialize outer scoped variable '{0}' in the same scope as block scoped declaration '{1}'." },
-        The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation: { code: 2483, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation_2483", message: "The left-hand side of a 'for...of' statement cannot use a type annotation." },
-        Export_declaration_conflicts_with_exported_declaration_of_0: { code: 2484, category: ts.DiagnosticCategory.Error, key: "Export_declaration_conflicts_with_exported_declaration_of_0_2484", message: "Export declaration conflicts with exported declaration of '{0}'" },
-        The_left_hand_side_of_a_for_of_statement_cannot_be_a_constant_or_a_read_only_property: { code: 2485, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_of_statement_cannot_be_a_constant_or_a_read_only_property_2485", message: "The left-hand side of a 'for...of' statement cannot be a constant or a read-only property." },
-        The_left_hand_side_of_a_for_in_statement_cannot_be_a_constant_or_a_read_only_property: { code: 2486, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_cannot_be_a_constant_or_a_read_only_property_2486", message: "The left-hand side of a 'for...in' statement cannot be a constant or a read-only property." },
-        Invalid_left_hand_side_in_for_of_statement: { code: 2487, category: ts.DiagnosticCategory.Error, key: "Invalid_left_hand_side_in_for_of_statement_2487", message: "Invalid left-hand side in 'for...of' statement." },
-        Type_must_have_a_Symbol_iterator_method_that_returns_an_iterator: { code: 2488, category: ts.DiagnosticCategory.Error, key: "Type_must_have_a_Symbol_iterator_method_that_returns_an_iterator_2488", message: "Type must have a '[Symbol.iterator]()' method that returns an iterator." },
-        An_iterator_must_have_a_next_method: { code: 2489, category: ts.DiagnosticCategory.Error, key: "An_iterator_must_have_a_next_method_2489", message: "An iterator must have a 'next()' method." },
-        The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property: { code: 2490, category: ts.DiagnosticCategory.Error, key: "The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property_2490", message: "The type returned by the 'next()' method of an iterator must have a 'value' property." },
-        The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern: { code: 2491, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern_2491", message: "The left-hand side of a 'for...in' statement cannot be a destructuring pattern." },
-        Cannot_redeclare_identifier_0_in_catch_clause: { code: 2492, category: ts.DiagnosticCategory.Error, key: "Cannot_redeclare_identifier_0_in_catch_clause_2492", message: "Cannot redeclare identifier '{0}' in catch clause" },
-        Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2: { code: 2493, category: ts.DiagnosticCategory.Error, key: "Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2_2493", message: "Tuple type '{0}' with length '{1}' cannot be assigned to tuple with length '{2}'." },
-        Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher: { code: 2494, category: ts.DiagnosticCategory.Error, key: "Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher_2494", message: "Using a string in a 'for...of' statement is only supported in ECMAScript 5 and higher." },
-        Type_0_is_not_an_array_type_or_a_string_type: { code: 2495, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_an_array_type_or_a_string_type_2495", message: "Type '{0}' is not an array type or a string type." },
-        The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_standard_function_expression: { code: 2496, category: ts.DiagnosticCategory.Error, key: "The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_stand_2496", message: "The 'arguments' object cannot be referenced in an arrow function in ES3 and ES5. Consider using a standard function expression." },
-        Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct: { code: 2497, category: ts.DiagnosticCategory.Error, key: "Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct_2497", message: "Module '{0}' resolves to a non-module entity and cannot be imported using this construct." },
-        Module_0_uses_export_and_cannot_be_used_with_export_Asterisk: { code: 2498, category: ts.DiagnosticCategory.Error, key: "Module_0_uses_export_and_cannot_be_used_with_export_Asterisk_2498", message: "Module '{0}' uses 'export =' and cannot be used with 'export *'." },
-        An_interface_can_only_extend_an_identifier_Slashqualified_name_with_optional_type_arguments: { code: 2499, category: ts.DiagnosticCategory.Error, key: "An_interface_can_only_extend_an_identifier_Slashqualified_name_with_optional_type_arguments_2499", message: "An interface can only extend an identifier/qualified-name with optional type arguments." },
-        A_class_can_only_implement_an_identifier_Slashqualified_name_with_optional_type_arguments: { code: 2500, category: ts.DiagnosticCategory.Error, key: "A_class_can_only_implement_an_identifier_Slashqualified_name_with_optional_type_arguments_2500", message: "A class can only implement an identifier/qualified-name with optional type arguments." },
-        A_rest_element_cannot_contain_a_binding_pattern: { code: 2501, category: ts.DiagnosticCategory.Error, key: "A_rest_element_cannot_contain_a_binding_pattern_2501", message: "A rest element cannot contain a binding pattern." },
-        _0_is_referenced_directly_or_indirectly_in_its_own_type_annotation: { code: 2502, category: ts.DiagnosticCategory.Error, key: "_0_is_referenced_directly_or_indirectly_in_its_own_type_annotation_2502", message: "'{0}' is referenced directly or indirectly in its own type annotation." },
-        Cannot_find_namespace_0: { code: 2503, category: ts.DiagnosticCategory.Error, key: "Cannot_find_namespace_0_2503", message: "Cannot find namespace '{0}'." },
-        A_generator_cannot_have_a_void_type_annotation: { code: 2505, category: ts.DiagnosticCategory.Error, key: "A_generator_cannot_have_a_void_type_annotation_2505", message: "A generator cannot have a 'void' type annotation." },
-        _0_is_referenced_directly_or_indirectly_in_its_own_base_expression: { code: 2506, category: ts.DiagnosticCategory.Error, key: "_0_is_referenced_directly_or_indirectly_in_its_own_base_expression_2506", message: "'{0}' is referenced directly or indirectly in its own base expression." },
-        Type_0_is_not_a_constructor_function_type: { code: 2507, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_a_constructor_function_type_2507", message: "Type '{0}' is not a constructor function type." },
-        No_base_constructor_has_the_specified_number_of_type_arguments: { code: 2508, category: ts.DiagnosticCategory.Error, key: "No_base_constructor_has_the_specified_number_of_type_arguments_2508", message: "No base constructor has the specified number of type arguments." },
-        Base_constructor_return_type_0_is_not_a_class_or_interface_type: { code: 2509, category: ts.DiagnosticCategory.Error, key: "Base_constructor_return_type_0_is_not_a_class_or_interface_type_2509", message: "Base constructor return type '{0}' is not a class or interface type." },
-        Base_constructors_must_all_have_the_same_return_type: { code: 2510, category: ts.DiagnosticCategory.Error, key: "Base_constructors_must_all_have_the_same_return_type_2510", message: "Base constructors must all have the same return type." },
-        Cannot_create_an_instance_of_the_abstract_class_0: { code: 2511, category: ts.DiagnosticCategory.Error, key: "Cannot_create_an_instance_of_the_abstract_class_0_2511", message: "Cannot create an instance of the abstract class '{0}'." },
-        Overload_signatures_must_all_be_abstract_or_non_abstract: { code: 2512, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_abstract_or_non_abstract_2512", message: "Overload signatures must all be abstract or non-abstract." },
-        Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression: { code: 2513, category: ts.DiagnosticCategory.Error, key: "Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression_2513", message: "Abstract method '{0}' in class '{1}' cannot be accessed via super expression." },
-        Classes_containing_abstract_methods_must_be_marked_abstract: { code: 2514, category: ts.DiagnosticCategory.Error, key: "Classes_containing_abstract_methods_must_be_marked_abstract_2514", message: "Classes containing abstract methods must be marked abstract." },
-        Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2: { code: 2515, category: ts.DiagnosticCategory.Error, key: "Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2_2515", message: "Non-abstract class '{0}' does not implement inherited abstract member '{1}' from class '{2}'." },
-        All_declarations_of_an_abstract_method_must_be_consecutive: { code: 2516, category: ts.DiagnosticCategory.Error, key: "All_declarations_of_an_abstract_method_must_be_consecutive_2516", message: "All declarations of an abstract method must be consecutive." },
-        Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type: { code: 2517, category: ts.DiagnosticCategory.Error, key: "Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type_2517", message: "Cannot assign an abstract constructor type to a non-abstract constructor type." },
-        A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard: { code: 2518, category: ts.DiagnosticCategory.Error, key: "A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard_2518", message: "A 'this'-based type guard is not compatible with a parameter-based type guard." },
-        Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions: { code: 2520, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions_2520", message: "Duplicate identifier '{0}'. Compiler uses declaration '{1}' to support async functions." },
-        Expression_resolves_to_variable_declaration_0_that_compiler_uses_to_support_async_functions: { code: 2521, category: ts.DiagnosticCategory.Error, key: "Expression_resolves_to_variable_declaration_0_that_compiler_uses_to_support_async_functions_2521", message: "Expression resolves to variable declaration '{0}' that compiler uses to support async functions." },
-        The_arguments_object_cannot_be_referenced_in_an_async_function_or_method_in_ES3_and_ES5_Consider_using_a_standard_function_or_method: { code: 2522, category: ts.DiagnosticCategory.Error, key: "The_arguments_object_cannot_be_referenced_in_an_async_function_or_method_in_ES3_and_ES5_Consider_usi_2522", message: "The 'arguments' object cannot be referenced in an async function or method in ES3 and ES5. Consider using a standard function or method." },
-        yield_expressions_cannot_be_used_in_a_parameter_initializer: { code: 2523, category: ts.DiagnosticCategory.Error, key: "yield_expressions_cannot_be_used_in_a_parameter_initializer_2523", message: "'yield' expressions cannot be used in a parameter initializer." },
-        await_expressions_cannot_be_used_in_a_parameter_initializer: { code: 2524, category: ts.DiagnosticCategory.Error, key: "await_expressions_cannot_be_used_in_a_parameter_initializer_2524", message: "'await' expressions cannot be used in a parameter initializer." },
-        Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value: { code: 2525, category: ts.DiagnosticCategory.Error, key: "Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value_2525", message: "Initializer provides no value for this binding element and the binding element has no default value." },
-        A_this_type_is_available_only_in_a_non_static_member_of_a_class_or_interface: { code: 2526, category: ts.DiagnosticCategory.Error, key: "A_this_type_is_available_only_in_a_non_static_member_of_a_class_or_interface_2526", message: "A 'this' type is available only in a non-static member of a class or interface." },
-        The_inferred_type_of_0_references_an_inaccessible_this_type_A_type_annotation_is_necessary: { code: 2527, category: ts.DiagnosticCategory.Error, key: "The_inferred_type_of_0_references_an_inaccessible_this_type_A_type_annotation_is_necessary_2527", message: "The inferred type of '{0}' references an inaccessible 'this' type. A type annotation is necessary." },
-        A_module_cannot_have_multiple_default_exports: { code: 2528, category: ts.DiagnosticCategory.Error, key: "A_module_cannot_have_multiple_default_exports_2528", message: "A module cannot have multiple default exports." },
-        Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_containing_async_functions: { code: 2529, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_containing_async_func_2529", message: "Duplicate identifier '{0}'. Compiler reserves name '{1}' in top level scope of a module containing async functions." },
-        Property_0_is_incompatible_with_index_signature: { code: 2530, category: ts.DiagnosticCategory.Error, key: "Property_0_is_incompatible_with_index_signature_2530", message: "Property '{0}' is incompatible with index signature." },
-        Object_is_possibly_null: { code: 2531, category: ts.DiagnosticCategory.Error, key: "Object_is_possibly_null_2531", message: "Object is possibly 'null'." },
-        Object_is_possibly_undefined: { code: 2532, category: ts.DiagnosticCategory.Error, key: "Object_is_possibly_undefined_2532", message: "Object is possibly 'undefined'." },
-        Object_is_possibly_null_or_undefined: { code: 2533, category: ts.DiagnosticCategory.Error, key: "Object_is_possibly_null_or_undefined_2533", message: "Object is possibly 'null' or 'undefined'." },
-        A_function_returning_never_cannot_have_a_reachable_end_point: { code: 2534, category: ts.DiagnosticCategory.Error, key: "A_function_returning_never_cannot_have_a_reachable_end_point_2534", message: "A function returning 'never' cannot have a reachable end point." },
-        Enum_type_0_has_members_with_initializers_that_are_not_literals: { code: 2535, category: ts.DiagnosticCategory.Error, key: "Enum_type_0_has_members_with_initializers_that_are_not_literals_2535", message: "Enum type '{0}' has members with initializers that are not literals." },
-        JSX_element_attributes_type_0_may_not_be_a_union_type: { code: 2600, category: ts.DiagnosticCategory.Error, key: "JSX_element_attributes_type_0_may_not_be_a_union_type_2600", message: "JSX element attributes type '{0}' may not be a union type." },
-        The_return_type_of_a_JSX_element_constructor_must_return_an_object_type: { code: 2601, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_a_JSX_element_constructor_must_return_an_object_type_2601", message: "The return type of a JSX element constructor must return an object type." },
-        JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist: { code: 2602, category: ts.DiagnosticCategory.Error, key: "JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist_2602", message: "JSX element implicitly has type 'any' because the global type 'JSX.Element' does not exist." },
-        Property_0_in_type_1_is_not_assignable_to_type_2: { code: 2603, category: ts.DiagnosticCategory.Error, key: "Property_0_in_type_1_is_not_assignable_to_type_2_2603", message: "Property '{0}' in type '{1}' is not assignable to type '{2}'" },
-        JSX_element_type_0_does_not_have_any_construct_or_call_signatures: { code: 2604, category: ts.DiagnosticCategory.Error, key: "JSX_element_type_0_does_not_have_any_construct_or_call_signatures_2604", message: "JSX element type '{0}' does not have any construct or call signatures." },
-        JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements: { code: 2605, category: ts.DiagnosticCategory.Error, key: "JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements_2605", message: "JSX element type '{0}' is not a constructor function for JSX elements." },
-        Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property: { code: 2606, category: ts.DiagnosticCategory.Error, key: "Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property_2606", message: "Property '{0}' of JSX spread attribute is not assignable to target property." },
-        JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property: { code: 2607, category: ts.DiagnosticCategory.Error, key: "JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property_2607", message: "JSX element class does not support attributes because it does not have a '{0}' property" },
-        The_global_type_JSX_0_may_not_have_more_than_one_property: { code: 2608, category: ts.DiagnosticCategory.Error, key: "The_global_type_JSX_0_may_not_have_more_than_one_property_2608", message: "The global type 'JSX.{0}' may not have more than one property" },
-        Cannot_emit_namespaced_JSX_elements_in_React: { code: 2650, category: ts.DiagnosticCategory.Error, key: "Cannot_emit_namespaced_JSX_elements_in_React_2650", message: "Cannot emit namespaced JSX elements in React" },
-        A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums: { code: 2651, category: ts.DiagnosticCategory.Error, key: "A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_memb_2651", message: "A member initializer in a enum declaration cannot reference members declared after it, including members defined in other enums." },
-        Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead: { code: 2652, category: ts.DiagnosticCategory.Error, key: "Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_d_2652", message: "Merged declaration '{0}' cannot include a default export declaration. Consider adding a separate 'export default {0}' declaration instead." },
-        Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1: { code: 2653, category: ts.DiagnosticCategory.Error, key: "Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1_2653", message: "Non-abstract class expression does not implement inherited abstract member '{0}' from class '{1}'." },
-        Exported_external_package_typings_file_cannot_contain_tripleslash_references_Please_contact_the_package_author_to_update_the_package_definition: { code: 2654, category: ts.DiagnosticCategory.Error, key: "Exported_external_package_typings_file_cannot_contain_tripleslash_references_Please_contact_the_pack_2654", message: "Exported external package typings file cannot contain tripleslash references. Please contact the package author to update the package definition." },
-        Exported_external_package_typings_file_0_is_not_a_module_Please_contact_the_package_author_to_update_the_package_definition: { code: 2656, category: ts.DiagnosticCategory.Error, key: "Exported_external_package_typings_file_0_is_not_a_module_Please_contact_the_package_author_to_update_2656", message: "Exported external package typings file '{0}' is not a module. Please contact the package author to update the package definition." },
-        JSX_expressions_must_have_one_parent_element: { code: 2657, category: ts.DiagnosticCategory.Error, key: "JSX_expressions_must_have_one_parent_element_2657", message: "JSX expressions must have one parent element" },
-        Type_0_provides_no_match_for_the_signature_1: { code: 2658, category: ts.DiagnosticCategory.Error, key: "Type_0_provides_no_match_for_the_signature_1_2658", message: "Type '{0}' provides no match for the signature '{1}'" },
-        super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_higher: { code: 2659, category: ts.DiagnosticCategory.Error, key: "super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_highe_2659", message: "'super' is only allowed in members of object literal expressions when option 'target' is 'ES2015' or higher." },
-        super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions: { code: 2660, category: ts.DiagnosticCategory.Error, key: "super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions_2660", message: "'super' can only be referenced in members of derived classes or object literal expressions." },
-        Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module: { code: 2661, category: ts.DiagnosticCategory.Error, key: "Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module_2661", message: "Cannot export '{0}'. Only local declarations can be exported from a module." },
-        Cannot_find_name_0_Did_you_mean_the_static_member_1_0: { code: 2662, category: ts.DiagnosticCategory.Error, key: "Cannot_find_name_0_Did_you_mean_the_static_member_1_0_2662", message: "Cannot find name '{0}'. Did you mean the static member '{1}.{0}'?" },
-        Cannot_find_name_0_Did_you_mean_the_instance_member_this_0: { code: 2663, category: ts.DiagnosticCategory.Error, key: "Cannot_find_name_0_Did_you_mean_the_instance_member_this_0_2663", message: "Cannot find name '{0}'. Did you mean the instance member 'this.{0}'?" },
-        Invalid_module_name_in_augmentation_module_0_cannot_be_found: { code: 2664, category: ts.DiagnosticCategory.Error, key: "Invalid_module_name_in_augmentation_module_0_cannot_be_found_2664", message: "Invalid module name in augmentation, module '{0}' cannot be found." },
-        Exports_and_export_assignments_are_not_permitted_in_module_augmentations: { code: 2666, category: ts.DiagnosticCategory.Error, key: "Exports_and_export_assignments_are_not_permitted_in_module_augmentations_2666", message: "Exports and export assignments are not permitted in module augmentations." },
-        Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_module: { code: 2667, category: ts.DiagnosticCategory.Error, key: "Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_mod_2667", message: "Imports are not permitted in module augmentations. Consider moving them to the enclosing external module." },
-        export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always_visible: { code: 2668, category: ts.DiagnosticCategory.Error, key: "export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always__2668", message: "'export' modifier cannot be applied to ambient modules and module augmentations since they are always visible." },
-        Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations: { code: 2669, category: ts.DiagnosticCategory.Error, key: "Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_2669", message: "Augmentations for the global scope can only be directly nested in external modules or ambient module declarations." },
-        Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambient_context: { code: 2670, category: ts.DiagnosticCategory.Error, key: "Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambien_2670", message: "Augmentations for the global scope should have 'declare' modifier unless they appear in already ambient context." },
-        Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity: { code: 2671, category: ts.DiagnosticCategory.Error, key: "Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity_2671", message: "Cannot augment module '{0}' because it resolves to a non-module entity." },
-        Cannot_assign_a_0_constructor_type_to_a_1_constructor_type: { code: 2672, category: ts.DiagnosticCategory.Error, key: "Cannot_assign_a_0_constructor_type_to_a_1_constructor_type_2672", message: "Cannot assign a '{0}' constructor type to a '{1}' constructor type." },
-        Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration: { code: 2673, category: ts.DiagnosticCategory.Error, key: "Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration_2673", message: "Constructor of class '{0}' is private and only accessible within the class declaration." },
-        Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration: { code: 2674, category: ts.DiagnosticCategory.Error, key: "Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration_2674", message: "Constructor of class '{0}' is protected and only accessible within the class declaration." },
-        Cannot_extend_a_class_0_Class_constructor_is_marked_as_private: { code: 2675, category: ts.DiagnosticCategory.Error, key: "Cannot_extend_a_class_0_Class_constructor_is_marked_as_private_2675", message: "Cannot extend a class '{0}'. Class constructor is marked as private." },
-        Accessors_must_both_be_abstract_or_non_abstract: { code: 2676, category: ts.DiagnosticCategory.Error, key: "Accessors_must_both_be_abstract_or_non_abstract_2676", message: "Accessors must both be abstract or non-abstract." },
-        A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type: { code: 2677, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type_2677", message: "A type predicate's type must be assignable to its parameter's type." },
-        Type_0_is_not_comparable_to_type_1: { code: 2678, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_comparable_to_type_1_2678", message: "Type '{0}' is not comparable to type '{1}'." },
+    // Literals
+    function isNumericLiteral(node) {
+        return node.kind === 8 /* NumericLiteral */;
+    }
+    ts.isNumericLiteral = isNumericLiteral;
+    function isStringLiteral(node) {
+        return node.kind === 9 /* StringLiteral */;
+    }
+    ts.isStringLiteral = isStringLiteral;
+    function isJsxText(node) {
+        return node.kind === 10 /* JsxText */;
+    }
+    ts.isJsxText = isJsxText;
+    function isRegularExpressionLiteral(node) {
+        return node.kind === 12 /* RegularExpressionLiteral */;
+    }
+    ts.isRegularExpressionLiteral = isRegularExpressionLiteral;
+    function isNoSubstitutionTemplateLiteral(node) {
+        return node.kind === 13 /* NoSubstitutionTemplateLiteral */;
+    }
+    ts.isNoSubstitutionTemplateLiteral = isNoSubstitutionTemplateLiteral;
+    // Pseudo-literals
+    function isTemplateHead(node) {
+        return node.kind === 14 /* TemplateHead */;
+    }
+    ts.isTemplateHead = isTemplateHead;
+    function isTemplateMiddle(node) {
+        return node.kind === 15 /* TemplateMiddle */;
+    }
+    ts.isTemplateMiddle = isTemplateMiddle;
+    function isTemplateTail(node) {
+        return node.kind === 16 /* TemplateTail */;
+    }
+    ts.isTemplateTail = isTemplateTail;
+    function isIdentifier(node) {
+        return node.kind === 71 /* Identifier */;
+    }
+    ts.isIdentifier = isIdentifier;
+    // Names
+    function isQualifiedName(node) {
+        return node.kind === 143 /* QualifiedName */;
+    }
+    ts.isQualifiedName = isQualifiedName;
+    function isComputedPropertyName(node) {
+        return node.kind === 144 /* ComputedPropertyName */;
+    }
+    ts.isComputedPropertyName = isComputedPropertyName;
+    // Signature elements
+    function isTypeParameterDeclaration(node) {
+        return node.kind === 145 /* TypeParameter */;
+    }
+    ts.isTypeParameterDeclaration = isTypeParameterDeclaration;
+    function isParameter(node) {
+        return node.kind === 146 /* Parameter */;
+    }
+    ts.isParameter = isParameter;
+    function isDecorator(node) {
+        return node.kind === 147 /* Decorator */;
+    }
+    ts.isDecorator = isDecorator;
+    // TypeMember
+    function isPropertySignature(node) {
+        return node.kind === 148 /* PropertySignature */;
+    }
+    ts.isPropertySignature = isPropertySignature;
+    function isPropertyDeclaration(node) {
+        return node.kind === 149 /* PropertyDeclaration */;
+    }
+    ts.isPropertyDeclaration = isPropertyDeclaration;
+    function isMethodSignature(node) {
+        return node.kind === 150 /* MethodSignature */;
+    }
+    ts.isMethodSignature = isMethodSignature;
+    function isMethodDeclaration(node) {
+        return node.kind === 151 /* MethodDeclaration */;
+    }
+    ts.isMethodDeclaration = isMethodDeclaration;
+    function isConstructorDeclaration(node) {
+        return node.kind === 152 /* Constructor */;
+    }
+    ts.isConstructorDeclaration = isConstructorDeclaration;
+    function isGetAccessorDeclaration(node) {
+        return node.kind === 153 /* GetAccessor */;
+    }
+    ts.isGetAccessorDeclaration = isGetAccessorDeclaration;
+    function isSetAccessorDeclaration(node) {
+        return node.kind === 154 /* SetAccessor */;
+    }
+    ts.isSetAccessorDeclaration = isSetAccessorDeclaration;
+    function isCallSignatureDeclaration(node) {
+        return node.kind === 155 /* CallSignature */;
+    }
+    ts.isCallSignatureDeclaration = isCallSignatureDeclaration;
+    function isConstructSignatureDeclaration(node) {
+        return node.kind === 156 /* ConstructSignature */;
+    }
+    ts.isConstructSignatureDeclaration = isConstructSignatureDeclaration;
+    function isIndexSignatureDeclaration(node) {
+        return node.kind === 157 /* IndexSignature */;
+    }
+    ts.isIndexSignatureDeclaration = isIndexSignatureDeclaration;
+    // Type
+    function isTypePredicateNode(node) {
+        return node.kind === 158 /* TypePredicate */;
+    }
+    ts.isTypePredicateNode = isTypePredicateNode;
+    function isTypeReferenceNode(node) {
+        return node.kind === 159 /* TypeReference */;
+    }
+    ts.isTypeReferenceNode = isTypeReferenceNode;
+    function isFunctionTypeNode(node) {
+        return node.kind === 160 /* FunctionType */;
+    }
+    ts.isFunctionTypeNode = isFunctionTypeNode;
+    function isConstructorTypeNode(node) {
+        return node.kind === 161 /* ConstructorType */;
+    }
+    ts.isConstructorTypeNode = isConstructorTypeNode;
+    function isTypeQueryNode(node) {
+        return node.kind === 162 /* TypeQuery */;
+    }
+    ts.isTypeQueryNode = isTypeQueryNode;
+    function isTypeLiteralNode(node) {
+        return node.kind === 163 /* TypeLiteral */;
+    }
+    ts.isTypeLiteralNode = isTypeLiteralNode;
+    function isArrayTypeNode(node) {
+        return node.kind === 164 /* ArrayType */;
+    }
+    ts.isArrayTypeNode = isArrayTypeNode;
+    function isTupleTypeNode(node) {
+        return node.kind === 165 /* TupleType */;
+    }
+    ts.isTupleTypeNode = isTupleTypeNode;
+    function isUnionTypeNode(node) {
+        return node.kind === 166 /* UnionType */;
+    }
+    ts.isUnionTypeNode = isUnionTypeNode;
+    function isIntersectionTypeNode(node) {
+        return node.kind === 167 /* IntersectionType */;
+    }
+    ts.isIntersectionTypeNode = isIntersectionTypeNode;
+    function isParenthesizedTypeNode(node) {
+        return node.kind === 168 /* ParenthesizedType */;
+    }
+    ts.isParenthesizedTypeNode = isParenthesizedTypeNode;
+    function isThisTypeNode(node) {
+        return node.kind === 169 /* ThisType */;
+    }
+    ts.isThisTypeNode = isThisTypeNode;
+    function isTypeOperatorNode(node) {
+        return node.kind === 170 /* TypeOperator */;
+    }
+    ts.isTypeOperatorNode = isTypeOperatorNode;
+    function isIndexedAccessTypeNode(node) {
+        return node.kind === 171 /* IndexedAccessType */;
+    }
+    ts.isIndexedAccessTypeNode = isIndexedAccessTypeNode;
+    function isMappedTypeNode(node) {
+        return node.kind === 172 /* MappedType */;
+    }
+    ts.isMappedTypeNode = isMappedTypeNode;
+    function isLiteralTypeNode(node) {
+        return node.kind === 173 /* LiteralType */;
+    }
+    ts.isLiteralTypeNode = isLiteralTypeNode;
+    // Binding patterns
+    function isObjectBindingPattern(node) {
+        return node.kind === 174 /* ObjectBindingPattern */;
+    }
+    ts.isObjectBindingPattern = isObjectBindingPattern;
+    function isArrayBindingPattern(node) {
+        return node.kind === 175 /* ArrayBindingPattern */;
+    }
+    ts.isArrayBindingPattern = isArrayBindingPattern;
+    function isBindingElement(node) {
+        return node.kind === 176 /* BindingElement */;
+    }
+    ts.isBindingElement = isBindingElement;
+    // Expression
+    function isArrayLiteralExpression(node) {
+        return node.kind === 177 /* ArrayLiteralExpression */;
+    }
+    ts.isArrayLiteralExpression = isArrayLiteralExpression;
+    function isObjectLiteralExpression(node) {
+        return node.kind === 178 /* ObjectLiteralExpression */;
+    }
+    ts.isObjectLiteralExpression = isObjectLiteralExpression;
+    function isPropertyAccessExpression(node) {
+        return node.kind === 179 /* PropertyAccessExpression */;
+    }
+    ts.isPropertyAccessExpression = isPropertyAccessExpression;
+    function isElementAccessExpression(node) {
+        return node.kind === 180 /* ElementAccessExpression */;
+    }
+    ts.isElementAccessExpression = isElementAccessExpression;
+    function isCallExpression(node) {
+        return node.kind === 181 /* CallExpression */;
+    }
+    ts.isCallExpression = isCallExpression;
+    function isNewExpression(node) {
+        return node.kind === 182 /* NewExpression */;
+    }
+    ts.isNewExpression = isNewExpression;
+    function isTaggedTemplateExpression(node) {
+        return node.kind === 183 /* TaggedTemplateExpression */;
+    }
+    ts.isTaggedTemplateExpression = isTaggedTemplateExpression;
+    function isTypeAssertion(node) {
+        return node.kind === 184 /* TypeAssertionExpression */;
+    }
+    ts.isTypeAssertion = isTypeAssertion;
+    function isParenthesizedExpression(node) {
+        return node.kind === 185 /* ParenthesizedExpression */;
+    }
+    ts.isParenthesizedExpression = isParenthesizedExpression;
+    function skipPartiallyEmittedExpressions(node) {
+        while (node.kind === 297 /* PartiallyEmittedExpression */) {
+            node = node.expression;
+        }
+        return node;
+    }
+    ts.skipPartiallyEmittedExpressions = skipPartiallyEmittedExpressions;
+    function isFunctionExpression(node) {
+        return node.kind === 186 /* FunctionExpression */;
+    }
+    ts.isFunctionExpression = isFunctionExpression;
+    function isArrowFunction(node) {
+        return node.kind === 187 /* ArrowFunction */;
+    }
+    ts.isArrowFunction = isArrowFunction;
+    function isDeleteExpression(node) {
+        return node.kind === 188 /* DeleteExpression */;
+    }
+    ts.isDeleteExpression = isDeleteExpression;
+    function isTypeOfExpression(node) {
+        return node.kind === 191 /* AwaitExpression */;
+    }
+    ts.isTypeOfExpression = isTypeOfExpression;
+    function isVoidExpression(node) {
+        return node.kind === 190 /* VoidExpression */;
+    }
+    ts.isVoidExpression = isVoidExpression;
+    function isAwaitExpression(node) {
+        return node.kind === 191 /* AwaitExpression */;
+    }
+    ts.isAwaitExpression = isAwaitExpression;
+    function isPrefixUnaryExpression(node) {
+        return node.kind === 192 /* PrefixUnaryExpression */;
+    }
+    ts.isPrefixUnaryExpression = isPrefixUnaryExpression;
+    function isPostfixUnaryExpression(node) {
+        return node.kind === 193 /* PostfixUnaryExpression */;
+    }
+    ts.isPostfixUnaryExpression = isPostfixUnaryExpression;
+    function isBinaryExpression(node) {
+        return node.kind === 194 /* BinaryExpression */;
+    }
+    ts.isBinaryExpression = isBinaryExpression;
+    function isConditionalExpression(node) {
+        return node.kind === 195 /* ConditionalExpression */;
+    }
+    ts.isConditionalExpression = isConditionalExpression;
+    function isTemplateExpression(node) {
+        return node.kind === 196 /* TemplateExpression */;
+    }
+    ts.isTemplateExpression = isTemplateExpression;
+    function isYieldExpression(node) {
+        return node.kind === 197 /* YieldExpression */;
+    }
+    ts.isYieldExpression = isYieldExpression;
+    function isSpreadElement(node) {
+        return node.kind === 198 /* SpreadElement */;
+    }
+    ts.isSpreadElement = isSpreadElement;
+    function isClassExpression(node) {
+        return node.kind === 199 /* ClassExpression */;
+    }
+    ts.isClassExpression = isClassExpression;
+    function isOmittedExpression(node) {
+        return node.kind === 200 /* OmittedExpression */;
+    }
+    ts.isOmittedExpression = isOmittedExpression;
+    function isExpressionWithTypeArguments(node) {
+        return node.kind === 201 /* ExpressionWithTypeArguments */;
+    }
+    ts.isExpressionWithTypeArguments = isExpressionWithTypeArguments;
+    function isAsExpression(node) {
+        return node.kind === 202 /* AsExpression */;
+    }
+    ts.isAsExpression = isAsExpression;
+    function isNonNullExpression(node) {
+        return node.kind === 203 /* NonNullExpression */;
+    }
+    ts.isNonNullExpression = isNonNullExpression;
+    function isMetaProperty(node) {
+        return node.kind === 204 /* MetaProperty */;
+    }
+    ts.isMetaProperty = isMetaProperty;
+    // Misc
+    function isTemplateSpan(node) {
+        return node.kind === 205 /* TemplateSpan */;
+    }
+    ts.isTemplateSpan = isTemplateSpan;
+    function isSemicolonClassElement(node) {
+        return node.kind === 206 /* SemicolonClassElement */;
+    }
+    ts.isSemicolonClassElement = isSemicolonClassElement;
+    // Block
+    function isBlock(node) {
+        return node.kind === 207 /* Block */;
+    }
+    ts.isBlock = isBlock;
+    function isVariableStatement(node) {
+        return node.kind === 208 /* VariableStatement */;
+    }
+    ts.isVariableStatement = isVariableStatement;
+    function isEmptyStatement(node) {
+        return node.kind === 209 /* EmptyStatement */;
+    }
+    ts.isEmptyStatement = isEmptyStatement;
+    function isExpressionStatement(node) {
+        return node.kind === 210 /* ExpressionStatement */;
+    }
+    ts.isExpressionStatement = isExpressionStatement;
+    function isIfStatement(node) {
+        return node.kind === 211 /* IfStatement */;
+    }
+    ts.isIfStatement = isIfStatement;
+    function isDoStatement(node) {
+        return node.kind === 212 /* DoStatement */;
+    }
+    ts.isDoStatement = isDoStatement;
+    function isWhileStatement(node) {
+        return node.kind === 213 /* WhileStatement */;
+    }
+    ts.isWhileStatement = isWhileStatement;
+    function isForStatement(node) {
+        return node.kind === 214 /* ForStatement */;
+    }
+    ts.isForStatement = isForStatement;
+    function isForInStatement(node) {
+        return node.kind === 215 /* ForInStatement */;
+    }
+    ts.isForInStatement = isForInStatement;
+    function isForOfStatement(node) {
+        return node.kind === 216 /* ForOfStatement */;
+    }
+    ts.isForOfStatement = isForOfStatement;
+    function isContinueStatement(node) {
+        return node.kind === 217 /* ContinueStatement */;
+    }
+    ts.isContinueStatement = isContinueStatement;
+    function isBreakStatement(node) {
+        return node.kind === 218 /* BreakStatement */;
+    }
+    ts.isBreakStatement = isBreakStatement;
+    function isReturnStatement(node) {
+        return node.kind === 219 /* ReturnStatement */;
+    }
+    ts.isReturnStatement = isReturnStatement;
+    function isWithStatement(node) {
+        return node.kind === 220 /* WithStatement */;
+    }
+    ts.isWithStatement = isWithStatement;
+    function isSwitchStatement(node) {
+        return node.kind === 221 /* SwitchStatement */;
+    }
+    ts.isSwitchStatement = isSwitchStatement;
+    function isLabeledStatement(node) {
+        return node.kind === 222 /* LabeledStatement */;
+    }
+    ts.isLabeledStatement = isLabeledStatement;
+    function isThrowStatement(node) {
+        return node.kind === 223 /* ThrowStatement */;
+    }
+    ts.isThrowStatement = isThrowStatement;
+    function isTryStatement(node) {
+        return node.kind === 224 /* TryStatement */;
+    }
+    ts.isTryStatement = isTryStatement;
+    function isDebuggerStatement(node) {
+        return node.kind === 225 /* DebuggerStatement */;
+    }
+    ts.isDebuggerStatement = isDebuggerStatement;
+    function isVariableDeclaration(node) {
+        return node.kind === 226 /* VariableDeclaration */;
+    }
+    ts.isVariableDeclaration = isVariableDeclaration;
+    function isVariableDeclarationList(node) {
+        return node.kind === 227 /* VariableDeclarationList */;
+    }
+    ts.isVariableDeclarationList = isVariableDeclarationList;
+    function isFunctionDeclaration(node) {
+        return node.kind === 228 /* FunctionDeclaration */;
+    }
+    ts.isFunctionDeclaration = isFunctionDeclaration;
+    function isClassDeclaration(node) {
+        return node.kind === 229 /* ClassDeclaration */;
+    }
+    ts.isClassDeclaration = isClassDeclaration;
+    function isInterfaceDeclaration(node) {
+        return node.kind === 230 /* InterfaceDeclaration */;
+    }
+    ts.isInterfaceDeclaration = isInterfaceDeclaration;
+    function isTypeAliasDeclaration(node) {
+        return node.kind === 231 /* TypeAliasDeclaration */;
+    }
+    ts.isTypeAliasDeclaration = isTypeAliasDeclaration;
+    function isEnumDeclaration(node) {
+        return node.kind === 232 /* EnumDeclaration */;
+    }
+    ts.isEnumDeclaration = isEnumDeclaration;
+    function isModuleDeclaration(node) {
+        return node.kind === 233 /* ModuleDeclaration */;
+    }
+    ts.isModuleDeclaration = isModuleDeclaration;
+    function isModuleBlock(node) {
+        return node.kind === 234 /* ModuleBlock */;
+    }
+    ts.isModuleBlock = isModuleBlock;
+    function isCaseBlock(node) {
+        return node.kind === 235 /* CaseBlock */;
+    }
+    ts.isCaseBlock = isCaseBlock;
+    function isNamespaceExportDeclaration(node) {
+        return node.kind === 236 /* NamespaceExportDeclaration */;
+    }
+    ts.isNamespaceExportDeclaration = isNamespaceExportDeclaration;
+    function isImportEqualsDeclaration(node) {
+        return node.kind === 237 /* ImportEqualsDeclaration */;
+    }
+    ts.isImportEqualsDeclaration = isImportEqualsDeclaration;
+    function isImportDeclaration(node) {
+        return node.kind === 238 /* ImportDeclaration */;
+    }
+    ts.isImportDeclaration = isImportDeclaration;
+    function isImportClause(node) {
+        return node.kind === 239 /* ImportClause */;
+    }
+    ts.isImportClause = isImportClause;
+    function isNamespaceImport(node) {
+        return node.kind === 240 /* NamespaceImport */;
+    }
+    ts.isNamespaceImport = isNamespaceImport;
+    function isNamedImports(node) {
+        return node.kind === 241 /* NamedImports */;
+    }
+    ts.isNamedImports = isNamedImports;
+    function isImportSpecifier(node) {
+        return node.kind === 242 /* ImportSpecifier */;
+    }
+    ts.isImportSpecifier = isImportSpecifier;
+    function isExportAssignment(node) {
+        return node.kind === 243 /* ExportAssignment */;
+    }
+    ts.isExportAssignment = isExportAssignment;
+    function isExportDeclaration(node) {
+        return node.kind === 244 /* ExportDeclaration */;
+    }
+    ts.isExportDeclaration = isExportDeclaration;
+    function isNamedExports(node) {
+        return node.kind === 245 /* NamedExports */;
+    }
+    ts.isNamedExports = isNamedExports;
+    function isExportSpecifier(node) {
+        return node.kind === 246 /* ExportSpecifier */;
+    }
+    ts.isExportSpecifier = isExportSpecifier;
+    function isMissingDeclaration(node) {
+        return node.kind === 247 /* MissingDeclaration */;
+    }
+    ts.isMissingDeclaration = isMissingDeclaration;
+    // Module References
+    function isExternalModuleReference(node) {
+        return node.kind === 248 /* ExternalModuleReference */;
+    }
+    ts.isExternalModuleReference = isExternalModuleReference;
+    // JSX
+    function isJsxElement(node) {
+        return node.kind === 249 /* JsxElement */;
+    }
+    ts.isJsxElement = isJsxElement;
+    function isJsxSelfClosingElement(node) {
+        return node.kind === 250 /* JsxSelfClosingElement */;
+    }
+    ts.isJsxSelfClosingElement = isJsxSelfClosingElement;
+    function isJsxOpeningElement(node) {
+        return node.kind === 251 /* JsxOpeningElement */;
+    }
+    ts.isJsxOpeningElement = isJsxOpeningElement;
+    function isJsxClosingElement(node) {
+        return node.kind === 252 /* JsxClosingElement */;
+    }
+    ts.isJsxClosingElement = isJsxClosingElement;
+    function isJsxAttribute(node) {
+        return node.kind === 253 /* JsxAttribute */;
+    }
+    ts.isJsxAttribute = isJsxAttribute;
+    function isJsxAttributes(node) {
+        return node.kind === 254 /* JsxAttributes */;
+    }
+    ts.isJsxAttributes = isJsxAttributes;
+    function isJsxSpreadAttribute(node) {
+        return node.kind === 255 /* JsxSpreadAttribute */;
+    }
+    ts.isJsxSpreadAttribute = isJsxSpreadAttribute;
+    function isJsxExpression(node) {
+        return node.kind === 256 /* JsxExpression */;
+    }
+    ts.isJsxExpression = isJsxExpression;
+    // Clauses
+    function isCaseClause(node) {
+        return node.kind === 257 /* CaseClause */;
+    }
+    ts.isCaseClause = isCaseClause;
+    function isDefaultClause(node) {
+        return node.kind === 258 /* DefaultClause */;
+    }
+    ts.isDefaultClause = isDefaultClause;
+    function isHeritageClause(node) {
+        return node.kind === 259 /* HeritageClause */;
+    }
+    ts.isHeritageClause = isHeritageClause;
+    function isCatchClause(node) {
+        return node.kind === 260 /* CatchClause */;
+    }
+    ts.isCatchClause = isCatchClause;
+    // Property assignments
+    function isPropertyAssignment(node) {
+        return node.kind === 261 /* PropertyAssignment */;
+    }
+    ts.isPropertyAssignment = isPropertyAssignment;
+    function isShorthandPropertyAssignment(node) {
+        return node.kind === 262 /* ShorthandPropertyAssignment */;
+    }
+    ts.isShorthandPropertyAssignment = isShorthandPropertyAssignment;
+    function isSpreadAssignment(node) {
+        return node.kind === 263 /* SpreadAssignment */;
+    }
+    ts.isSpreadAssignment = isSpreadAssignment;
+    // Enum
+    function isEnumMember(node) {
+        return node.kind === 264 /* EnumMember */;
+    }
+    ts.isEnumMember = isEnumMember;
+    // Top-level nodes
+    function isSourceFile(node) {
+        return node.kind === 265 /* SourceFile */;
+    }
+    ts.isSourceFile = isSourceFile;
+    function isBundle(node) {
+        return node.kind === 266 /* Bundle */;
+    }
+    ts.isBundle = isBundle;
+    // JSDoc
+    function isJSDocTypeExpression(node) {
+        return node.kind === 267 /* JSDocTypeExpression */;
+    }
+    ts.isJSDocTypeExpression = isJSDocTypeExpression;
+    function isJSDocAllType(node) {
+        return node.kind === 268 /* JSDocAllType */;
+    }
+    ts.isJSDocAllType = isJSDocAllType;
+    function isJSDocUnknownType(node) {
+        return node.kind === 269 /* JSDocUnknownType */;
+    }
+    ts.isJSDocUnknownType = isJSDocUnknownType;
+    function isJSDocArrayType(node) {
+        return node.kind === 270 /* JSDocArrayType */;
+    }
+    ts.isJSDocArrayType = isJSDocArrayType;
+    function isJSDocUnionType(node) {
+        return node.kind === 271 /* JSDocUnionType */;
+    }
+    ts.isJSDocUnionType = isJSDocUnionType;
+    function isJSDocTupleType(node) {
+        return node.kind === 272 /* JSDocTupleType */;
+    }
+    ts.isJSDocTupleType = isJSDocTupleType;
+    function isJSDocNullableType(node) {
+        return node.kind === 273 /* JSDocNullableType */;
+    }
+    ts.isJSDocNullableType = isJSDocNullableType;
+    function isJSDocNonNullableType(node) {
+        return node.kind === 274 /* JSDocNonNullableType */;
+    }
+    ts.isJSDocNonNullableType = isJSDocNonNullableType;
+    function isJSDocRecordType(node) {
+        return node.kind === 275 /* JSDocRecordType */;
+    }
+    ts.isJSDocRecordType = isJSDocRecordType;
+    function isJSDocRecordMember(node) {
+        return node.kind === 276 /* JSDocRecordMember */;
+    }
+    ts.isJSDocRecordMember = isJSDocRecordMember;
+    function isJSDocTypeReference(node) {
+        return node.kind === 277 /* JSDocTypeReference */;
+    }
+    ts.isJSDocTypeReference = isJSDocTypeReference;
+    function isJSDocOptionalType(node) {
+        return node.kind === 278 /* JSDocOptionalType */;
+    }
+    ts.isJSDocOptionalType = isJSDocOptionalType;
+    function isJSDocFunctionType(node) {
+        return node.kind === 279 /* JSDocFunctionType */;
+    }
+    ts.isJSDocFunctionType = isJSDocFunctionType;
+    function isJSDocVariadicType(node) {
+        return node.kind === 280 /* JSDocVariadicType */;
+    }
+    ts.isJSDocVariadicType = isJSDocVariadicType;
+    function isJSDocConstructorType(node) {
+        return node.kind === 281 /* JSDocConstructorType */;
+    }
+    ts.isJSDocConstructorType = isJSDocConstructorType;
+    function isJSDocThisType(node) {
+        return node.kind === 282 /* JSDocThisType */;
+    }
+    ts.isJSDocThisType = isJSDocThisType;
+    function isJSDoc(node) {
+        return node.kind === 283 /* JSDocComment */;
+    }
+    ts.isJSDoc = isJSDoc;
+    function isJSDocAugmentsTag(node) {
+        return node.kind === 285 /* JSDocAugmentsTag */;
+    }
+    ts.isJSDocAugmentsTag = isJSDocAugmentsTag;
+    function isJSDocParameterTag(node) {
+        return node.kind === 287 /* JSDocParameterTag */;
+    }
+    ts.isJSDocParameterTag = isJSDocParameterTag;
+    function isJSDocReturnTag(node) {
+        return node.kind === 288 /* JSDocReturnTag */;
+    }
+    ts.isJSDocReturnTag = isJSDocReturnTag;
+    function isJSDocTypeTag(node) {
+        return node.kind === 289 /* JSDocTypeTag */;
+    }
+    ts.isJSDocTypeTag = isJSDocTypeTag;
+    function isJSDocTemplateTag(node) {
+        return node.kind === 290 /* JSDocTemplateTag */;
+    }
+    ts.isJSDocTemplateTag = isJSDocTemplateTag;
+    function isJSDocTypedefTag(node) {
+        return node.kind === 291 /* JSDocTypedefTag */;
+    }
+    ts.isJSDocTypedefTag = isJSDocTypedefTag;
+    function isJSDocPropertyTag(node) {
+        return node.kind === 292 /* JSDocPropertyTag */;
+    }
+    ts.isJSDocPropertyTag = isJSDocPropertyTag;
+    function isJSDocTypeLiteral(node) {
+        return node.kind === 293 /* JSDocTypeLiteral */;
+    }
+    ts.isJSDocTypeLiteral = isJSDocTypeLiteral;
+    function isJSDocLiteralType(node) {
+        return node.kind === 294 /* JSDocLiteralType */;
+    }
+    ts.isJSDocLiteralType = isJSDocLiteralType;
+})(ts || (ts = {}));
+// Node tests
+//
+// All node tests in the following list should *not* reference parent pointers so that
+// they may be used with transformations.
+(function (ts) {
+    /* @internal */
+    function isNode(node) {
+        return isNodeKind(node.kind);
+    }
+    ts.isNode = isNode;
+    /* @internal */
+    function isNodeKind(kind) {
+        return kind >= 143 /* FirstNode */;
+    }
+    ts.isNodeKind = isNodeKind;
+    /**
+     * True if node is of some token syntax kind.
+     * For example, this is true for an IfKeyword but not for an IfStatement.
+     */
+    function isToken(n) {
+        return n.kind >= 0 /* FirstToken */ && n.kind <= 142 /* LastToken */;
+    }
+    ts.isToken = isToken;
+    // Node Arrays
+    /* @internal */
+    function isNodeArray(array) {
+        return array.hasOwnProperty("pos")
+            && array.hasOwnProperty("end");
+    }
+    ts.isNodeArray = isNodeArray;
+    // Literals
+    /* @internal */
+    function isLiteralKind(kind) {
+        return 8 /* FirstLiteralToken */ <= kind && kind <= 13 /* LastLiteralToken */;
+    }
+    ts.isLiteralKind = isLiteralKind;
+    function isLiteralExpression(node) {
+        return isLiteralKind(node.kind);
+    }
+    ts.isLiteralExpression = isLiteralExpression;
+    // Pseudo-literals
+    /* @internal */
+    function isTemplateLiteralKind(kind) {
+        return 13 /* FirstTemplateToken */ <= kind && kind <= 16 /* LastTemplateToken */;
+    }
+    ts.isTemplateLiteralKind = isTemplateLiteralKind;
+    function isTemplateMiddleOrTemplateTail(node) {
+        var kind = node.kind;
+        return kind === 15 /* TemplateMiddle */
+            || kind === 16 /* TemplateTail */;
+    }
+    ts.isTemplateMiddleOrTemplateTail = isTemplateMiddleOrTemplateTail;
+    // Identifiers
+    /* @internal */
+    function isGeneratedIdentifier(node) {
+        // Using `>` here catches both `GeneratedIdentifierKind.None` and `undefined`.
+        return ts.isIdentifier(node) && node.autoGenerateKind > 0 /* None */;
+    }
+    ts.isGeneratedIdentifier = isGeneratedIdentifier;
+    // Keywords
+    /* @internal */
+    function isModifierKind(token) {
+        switch (token) {
+            case 117 /* AbstractKeyword */:
+            case 120 /* AsyncKeyword */:
+            case 76 /* ConstKeyword */:
+            case 124 /* DeclareKeyword */:
+            case 79 /* DefaultKeyword */:
+            case 84 /* ExportKeyword */:
+            case 114 /* PublicKeyword */:
+            case 112 /* PrivateKeyword */:
+            case 113 /* ProtectedKeyword */:
+            case 131 /* ReadonlyKeyword */:
+            case 115 /* StaticKeyword */:
+                return true;
+        }
+        return false;
+    }
+    ts.isModifierKind = isModifierKind;
+    function isModifier(node) {
+        return isModifierKind(node.kind);
+    }
+    ts.isModifier = isModifier;
+    function isEntityName(node) {
+        var kind = node.kind;
+        return kind === 143 /* QualifiedName */
+            || kind === 71 /* Identifier */;
+    }
+    ts.isEntityName = isEntityName;
+    function isPropertyName(node) {
+        var kind = node.kind;
+        return kind === 71 /* Identifier */
+            || kind === 9 /* StringLiteral */
+            || kind === 8 /* NumericLiteral */
+            || kind === 144 /* ComputedPropertyName */;
+    }
+    ts.isPropertyName = isPropertyName;
+    function isBindingName(node) {
+        var kind = node.kind;
+        return kind === 71 /* Identifier */
+            || kind === 174 /* ObjectBindingPattern */
+            || kind === 175 /* ArrayBindingPattern */;
+    }
+    ts.isBindingName = isBindingName;
+    // Functions
+    function isFunctionLike(node) {
+        return node && isFunctionLikeKind(node.kind);
+    }
+    ts.isFunctionLike = isFunctionLike;
+    /* @internal */
+    function isFunctionLikeKind(kind) {
+        switch (kind) {
+            case 152 /* Constructor */:
+            case 186 /* FunctionExpression */:
+            case 228 /* FunctionDeclaration */:
+            case 187 /* ArrowFunction */:
+            case 151 /* MethodDeclaration */:
+            case 150 /* MethodSignature */:
+            case 153 /* GetAccessor */:
+            case 154 /* SetAccessor */:
+            case 155 /* CallSignature */:
+            case 156 /* ConstructSignature */:
+            case 157 /* IndexSignature */:
+            case 160 /* FunctionType */:
+            case 161 /* ConstructorType */:
+                return true;
+        }
+        return false;
+    }
+    ts.isFunctionLikeKind = isFunctionLikeKind;
+    // Classes
+    function isClassElement(node) {
+        var kind = node.kind;
+        return kind === 152 /* Constructor */
+            || kind === 149 /* PropertyDeclaration */
+            || kind === 151 /* MethodDeclaration */
+            || kind === 153 /* GetAccessor */
+            || kind === 154 /* SetAccessor */
+            || kind === 157 /* IndexSignature */
+            || kind === 206 /* SemicolonClassElement */
+            || kind === 247 /* MissingDeclaration */;
+    }
+    ts.isClassElement = isClassElement;
+    function isClassLike(node) {
+        return node && (node.kind === 229 /* ClassDeclaration */ || node.kind === 199 /* ClassExpression */);
+    }
+    ts.isClassLike = isClassLike;
+    function isAccessor(node) {
+        return node && (node.kind === 153 /* GetAccessor */ || node.kind === 154 /* SetAccessor */);
+    }
+    ts.isAccessor = isAccessor;
+    // Type members
+    function isTypeElement(node) {
+        var kind = node.kind;
+        return kind === 156 /* ConstructSignature */
+            || kind === 155 /* CallSignature */
+            || kind === 148 /* PropertySignature */
+            || kind === 150 /* MethodSignature */
+            || kind === 157 /* IndexSignature */
+            || kind === 247 /* MissingDeclaration */;
+    }
+    ts.isTypeElement = isTypeElement;
+    function isObjectLiteralElementLike(node) {
+        var kind = node.kind;
+        return kind === 261 /* PropertyAssignment */
+            || kind === 262 /* ShorthandPropertyAssignment */
+            || kind === 263 /* SpreadAssignment */
+            || kind === 151 /* MethodDeclaration */
+            || kind === 153 /* GetAccessor */
+            || kind === 154 /* SetAccessor */
+            || kind === 247 /* MissingDeclaration */;
+    }
+    ts.isObjectLiteralElementLike = isObjectLiteralElementLike;
+    // Type
+    function isTypeNodeKind(kind) {
+        return (kind >= 158 /* FirstTypeNode */ && kind <= 173 /* LastTypeNode */)
+            || kind === 119 /* AnyKeyword */
+            || kind === 133 /* NumberKeyword */
+            || kind === 134 /* ObjectKeyword */
+            || kind === 122 /* BooleanKeyword */
+            || kind === 136 /* StringKeyword */
+            || kind === 137 /* SymbolKeyword */
+            || kind === 99 /* ThisKeyword */
+            || kind === 105 /* VoidKeyword */
+            || kind === 139 /* UndefinedKeyword */
+            || kind === 95 /* NullKeyword */
+            || kind === 130 /* NeverKeyword */
+            || kind === 201 /* ExpressionWithTypeArguments */;
+    }
+    /**
+     * Node test that determines whether a node is a valid type node.
+     * This differs from the `isPartOfTypeNode` function which determines whether a node is *part*
+     * of a TypeNode.
+     */
+    function isTypeNode(node) {
+        return isTypeNodeKind(node.kind);
+    }
+    ts.isTypeNode = isTypeNode;
+    function isFunctionOrConstructorTypeNode(node) {
+        switch (node.kind) {
+            case 160 /* FunctionType */:
+            case 161 /* ConstructorType */:
+                return true;
+        }
+        return false;
+    }
+    ts.isFunctionOrConstructorTypeNode = isFunctionOrConstructorTypeNode;
+    // Binding patterns
+    /* @internal */
+    function isBindingPattern(node) {
+        if (node) {
+            var kind = node.kind;
+            return kind === 175 /* ArrayBindingPattern */
+                || kind === 174 /* ObjectBindingPattern */;
+        }
+        return false;
+    }
+    ts.isBindingPattern = isBindingPattern;
+    /* @internal */
+    function isAssignmentPattern(node) {
+        var kind = node.kind;
+        return kind === 177 /* ArrayLiteralExpression */
+            || kind === 178 /* ObjectLiteralExpression */;
+    }
+    ts.isAssignmentPattern = isAssignmentPattern;
+    /* @internal */
+    function isArrayBindingElement(node) {
+        var kind = node.kind;
+        return kind === 176 /* BindingElement */
+            || kind === 200 /* OmittedExpression */;
+    }
+    ts.isArrayBindingElement = isArrayBindingElement;
+    /**
+     * Determines whether the BindingOrAssignmentElement is a BindingElement-like declaration
+     */
+    /* @internal */
+    function isDeclarationBindingElement(bindingElement) {
+        switch (bindingElement.kind) {
+            case 226 /* VariableDeclaration */:
+            case 146 /* Parameter */:
+            case 176 /* BindingElement */:
+                return true;
+        }
+        return false;
+    }
+    ts.isDeclarationBindingElement = isDeclarationBindingElement;
+    /**
+     * Determines whether a node is a BindingOrAssignmentPattern
+     */
+    /* @internal */
+    function isBindingOrAssignmentPattern(node) {
+        return isObjectBindingOrAssignmentPattern(node)
+            || isArrayBindingOrAssignmentPattern(node);
+    }
+    ts.isBindingOrAssignmentPattern = isBindingOrAssignmentPattern;
+    /**
+     * Determines whether a node is an ObjectBindingOrAssignmentPattern
+     */
+    /* @internal */
+    function isObjectBindingOrAssignmentPattern(node) {
+        switch (node.kind) {
+            case 174 /* ObjectBindingPattern */:
+            case 178 /* ObjectLiteralExpression */:
+                return true;
+        }
+        return false;
+    }
+    ts.isObjectBindingOrAssignmentPattern = isObjectBindingOrAssignmentPattern;
+    /**
+     * Determines whether a node is an ArrayBindingOrAssignmentPattern
+     */
+    /* @internal */
+    function isArrayBindingOrAssignmentPattern(node) {
+        switch (node.kind) {
+            case 175 /* ArrayBindingPattern */:
+            case 177 /* ArrayLiteralExpression */:
+                return true;
+        }
+        return false;
+    }
+    ts.isArrayBindingOrAssignmentPattern = isArrayBindingOrAssignmentPattern;
+    // Expression
+    function isPropertyAccessOrQualifiedName(node) {
+        var kind = node.kind;
+        return kind === 179 /* PropertyAccessExpression */
+            || kind === 143 /* QualifiedName */;
+    }
+    ts.isPropertyAccessOrQualifiedName = isPropertyAccessOrQualifiedName;
+    function isCallLikeExpression(node) {
+        switch (node.kind) {
+            case 251 /* JsxOpeningElement */:
+            case 250 /* JsxSelfClosingElement */:
+            case 181 /* CallExpression */:
+            case 182 /* NewExpression */:
+            case 183 /* TaggedTemplateExpression */:
+            case 147 /* Decorator */:
+                return true;
+            default:
+                return false;
+        }
+    }
+    ts.isCallLikeExpression = isCallLikeExpression;
+    function isCallOrNewExpression(node) {
+        return node.kind === 181 /* CallExpression */ || node.kind === 182 /* NewExpression */;
+    }
+    ts.isCallOrNewExpression = isCallOrNewExpression;
+    function isTemplateLiteral(node) {
+        var kind = node.kind;
+        return kind === 196 /* TemplateExpression */
+            || kind === 13 /* NoSubstitutionTemplateLiteral */;
+    }
+    ts.isTemplateLiteral = isTemplateLiteral;
+    function isLeftHandSideExpressionKind(kind) {
+        return kind === 179 /* PropertyAccessExpression */
+            || kind === 180 /* ElementAccessExpression */
+            || kind === 182 /* NewExpression */
+            || kind === 181 /* CallExpression */
+            || kind === 249 /* JsxElement */
+            || kind === 250 /* JsxSelfClosingElement */
+            || kind === 183 /* TaggedTemplateExpression */
+            || kind === 177 /* ArrayLiteralExpression */
+            || kind === 185 /* ParenthesizedExpression */
+            || kind === 178 /* ObjectLiteralExpression */
+            || kind === 199 /* ClassExpression */
+            || kind === 186 /* FunctionExpression */
+            || kind === 71 /* Identifier */
+            || kind === 12 /* RegularExpressionLiteral */
+            || kind === 8 /* NumericLiteral */
+            || kind === 9 /* StringLiteral */
+            || kind === 13 /* NoSubstitutionTemplateLiteral */
+            || kind === 196 /* TemplateExpression */
+            || kind === 86 /* FalseKeyword */
+            || kind === 95 /* NullKeyword */
+            || kind === 99 /* ThisKeyword */
+            || kind === 101 /* TrueKeyword */
+            || kind === 97 /* SuperKeyword */
+            || kind === 203 /* NonNullExpression */
+            || kind === 204 /* MetaProperty */;
+    }
+    /* @internal */
+    function isLeftHandSideExpression(node) {
+        return isLeftHandSideExpressionKind(ts.skipPartiallyEmittedExpressions(node).kind);
+    }
+    ts.isLeftHandSideExpression = isLeftHandSideExpression;
+    function isUnaryExpressionKind(kind) {
+        return kind === 192 /* PrefixUnaryExpression */
+            || kind === 193 /* PostfixUnaryExpression */
+            || kind === 188 /* DeleteExpression */
+            || kind === 189 /* TypeOfExpression */
+            || kind === 190 /* VoidExpression */
+            || kind === 191 /* AwaitExpression */
+            || kind === 184 /* TypeAssertionExpression */
+            || isLeftHandSideExpressionKind(kind);
+    }
+    /* @internal */
+    function isUnaryExpression(node) {
+        return isUnaryExpressionKind(ts.skipPartiallyEmittedExpressions(node).kind);
+    }
+    ts.isUnaryExpression = isUnaryExpression;
+    function isExpressionKind(kind) {
+        return kind === 195 /* ConditionalExpression */
+            || kind === 197 /* YieldExpression */
+            || kind === 187 /* ArrowFunction */
+            || kind === 194 /* BinaryExpression */
+            || kind === 198 /* SpreadElement */
+            || kind === 202 /* AsExpression */
+            || kind === 200 /* OmittedExpression */
+            || kind === 298 /* CommaListExpression */
+            || isUnaryExpressionKind(kind);
+    }
+    /* @internal */
+    function isExpression(node) {
+        return isExpressionKind(ts.skipPartiallyEmittedExpressions(node).kind);
+    }
+    ts.isExpression = isExpression;
+    function isAssertionExpression(node) {
+        var kind = node.kind;
+        return kind === 184 /* TypeAssertionExpression */
+            || kind === 202 /* AsExpression */;
+    }
+    ts.isAssertionExpression = isAssertionExpression;
+    /* @internal */
+    function isPartiallyEmittedExpression(node) {
+        return node.kind === 297 /* PartiallyEmittedExpression */;
+    }
+    ts.isPartiallyEmittedExpression = isPartiallyEmittedExpression;
+    /* @internal */
+    function isNotEmittedStatement(node) {
+        return node.kind === 296 /* NotEmittedStatement */;
+    }
+    ts.isNotEmittedStatement = isNotEmittedStatement;
+    /* @internal */
+    function isNotEmittedOrPartiallyEmittedNode(node) {
+        return isNotEmittedStatement(node)
+            || isPartiallyEmittedExpression(node);
+    }
+    ts.isNotEmittedOrPartiallyEmittedNode = isNotEmittedOrPartiallyEmittedNode;
+    // Statement
+    function isIterationStatement(node, lookInLabeledStatements) {
+        switch (node.kind) {
+            case 214 /* ForStatement */:
+            case 215 /* ForInStatement */:
+            case 216 /* ForOfStatement */:
+            case 212 /* DoStatement */:
+            case 213 /* WhileStatement */:
+                return true;
+            case 222 /* LabeledStatement */:
+                return lookInLabeledStatements && isIterationStatement(node.statement, lookInLabeledStatements);
+        }
+        return false;
+    }
+    ts.isIterationStatement = isIterationStatement;
+    /* @internal */
+    function isForInOrOfStatement(node) {
+        return node.kind === 215 /* ForInStatement */ || node.kind === 216 /* ForOfStatement */;
+    }
+    ts.isForInOrOfStatement = isForInOrOfStatement;
+    // Element
+    /* @internal */
+    function isConciseBody(node) {
+        return ts.isBlock(node)
+            || isExpression(node);
+    }
+    ts.isConciseBody = isConciseBody;
+    /* @internal */
+    function isFunctionBody(node) {
+        return ts.isBlock(node);
+    }
+    ts.isFunctionBody = isFunctionBody;
+    /* @internal */
+    function isForInitializer(node) {
+        return ts.isVariableDeclarationList(node)
+            || isExpression(node);
+    }
+    ts.isForInitializer = isForInitializer;
+    /* @internal */
+    function isModuleBody(node) {
+        var kind = node.kind;
+        return kind === 234 /* ModuleBlock */
+            || kind === 233 /* ModuleDeclaration */
+            || kind === 71 /* Identifier */;
+    }
+    ts.isModuleBody = isModuleBody;
+    /* @internal */
+    function isNamespaceBody(node) {
+        var kind = node.kind;
+        return kind === 234 /* ModuleBlock */
+            || kind === 233 /* ModuleDeclaration */;
+    }
+    ts.isNamespaceBody = isNamespaceBody;
+    /* @internal */
+    function isJSDocNamespaceBody(node) {
+        var kind = node.kind;
+        return kind === 71 /* Identifier */
+            || kind === 233 /* ModuleDeclaration */;
+    }
+    ts.isJSDocNamespaceBody = isJSDocNamespaceBody;
+    /* @internal */
+    function isNamedImportBindings(node) {
+        var kind = node.kind;
+        return kind === 241 /* NamedImports */
+            || kind === 240 /* NamespaceImport */;
+    }
+    ts.isNamedImportBindings = isNamedImportBindings;
+    /* @internal */
+    function isModuleOrEnumDeclaration(node) {
+        return node.kind === 233 /* ModuleDeclaration */ || node.kind === 232 /* EnumDeclaration */;
+    }
+    ts.isModuleOrEnumDeclaration = isModuleOrEnumDeclaration;
+    function isDeclarationKind(kind) {
+        return kind === 187 /* ArrowFunction */
+            || kind === 176 /* BindingElement */
+            || kind === 229 /* ClassDeclaration */
+            || kind === 199 /* ClassExpression */
+            || kind === 152 /* Constructor */
+            || kind === 232 /* EnumDeclaration */
+            || kind === 264 /* EnumMember */
+            || kind === 246 /* ExportSpecifier */
+            || kind === 228 /* FunctionDeclaration */
+            || kind === 186 /* FunctionExpression */
+            || kind === 153 /* GetAccessor */
+            || kind === 239 /* ImportClause */
+            || kind === 237 /* ImportEqualsDeclaration */
+            || kind === 242 /* ImportSpecifier */
+            || kind === 230 /* InterfaceDeclaration */
+            || kind === 253 /* JsxAttribute */
+            || kind === 151 /* MethodDeclaration */
+            || kind === 150 /* MethodSignature */
+            || kind === 233 /* ModuleDeclaration */
+            || kind === 236 /* NamespaceExportDeclaration */
+            || kind === 240 /* NamespaceImport */
+            || kind === 146 /* Parameter */
+            || kind === 261 /* PropertyAssignment */
+            || kind === 149 /* PropertyDeclaration */
+            || kind === 148 /* PropertySignature */
+            || kind === 154 /* SetAccessor */
+            || kind === 262 /* ShorthandPropertyAssignment */
+            || kind === 231 /* TypeAliasDeclaration */
+            || kind === 145 /* TypeParameter */
+            || kind === 226 /* VariableDeclaration */
+            || kind === 291 /* JSDocTypedefTag */;
+    }
+    function isDeclarationStatementKind(kind) {
+        return kind === 228 /* FunctionDeclaration */
+            || kind === 247 /* MissingDeclaration */
+            || kind === 229 /* ClassDeclaration */
+            || kind === 230 /* InterfaceDeclaration */
+            || kind === 231 /* TypeAliasDeclaration */
+            || kind === 232 /* EnumDeclaration */
+            || kind === 233 /* ModuleDeclaration */
+            || kind === 238 /* ImportDeclaration */
+            || kind === 237 /* ImportEqualsDeclaration */
+            || kind === 244 /* ExportDeclaration */
+            || kind === 243 /* ExportAssignment */
+            || kind === 236 /* NamespaceExportDeclaration */;
+    }
+    function isStatementKindButNotDeclarationKind(kind) {
+        return kind === 218 /* BreakStatement */
+            || kind === 217 /* ContinueStatement */
+            || kind === 225 /* DebuggerStatement */
+            || kind === 212 /* DoStatement */
+            || kind === 210 /* ExpressionStatement */
+            || kind === 209 /* EmptyStatement */
+            || kind === 215 /* ForInStatement */
+            || kind === 216 /* ForOfStatement */
+            || kind === 214 /* ForStatement */
+            || kind === 211 /* IfStatement */
+            || kind === 222 /* LabeledStatement */
+            || kind === 219 /* ReturnStatement */
+            || kind === 221 /* SwitchStatement */
+            || kind === 223 /* ThrowStatement */
+            || kind === 224 /* TryStatement */
+            || kind === 208 /* VariableStatement */
+            || kind === 213 /* WhileStatement */
+            || kind === 220 /* WithStatement */
+            || kind === 296 /* NotEmittedStatement */
+            || kind === 300 /* EndOfDeclarationMarker */
+            || kind === 299 /* MergeDeclarationMarker */;
+    }
+    /* @internal */
+    function isDeclaration(node) {
+        if (node.kind === 145 /* TypeParameter */) {
+            return node.parent.kind !== 290 /* JSDocTemplateTag */ || ts.isInJavaScriptFile(node);
+        }
+        return isDeclarationKind(node.kind);
+    }
+    ts.isDeclaration = isDeclaration;
+    /* @internal */
+    function isDeclarationStatement(node) {
+        return isDeclarationStatementKind(node.kind);
+    }
+    ts.isDeclarationStatement = isDeclarationStatement;
+    /**
+     * Determines whether the node is a statement that is not also a declaration
+     */
+    /* @internal */
+    function isStatementButNotDeclaration(node) {
+        return isStatementKindButNotDeclarationKind(node.kind);
+    }
+    ts.isStatementButNotDeclaration = isStatementButNotDeclaration;
+    /* @internal */
+    function isStatement(node) {
+        var kind = node.kind;
+        return isStatementKindButNotDeclarationKind(kind)
+            || isDeclarationStatementKind(kind)
+            || kind === 207 /* Block */;
+    }
+    ts.isStatement = isStatement;
+    // Module references
+    /* @internal */
+    function isModuleReference(node) {
+        var kind = node.kind;
+        return kind === 248 /* ExternalModuleReference */
+            || kind === 143 /* QualifiedName */
+            || kind === 71 /* Identifier */;
+    }
+    ts.isModuleReference = isModuleReference;
+    // JSX
+    /* @internal */
+    function isJsxTagNameExpression(node) {
+        var kind = node.kind;
+        return kind === 99 /* ThisKeyword */
+            || kind === 71 /* Identifier */
+            || kind === 179 /* PropertyAccessExpression */;
+    }
+    ts.isJsxTagNameExpression = isJsxTagNameExpression;
+    /* @internal */
+    function isJsxChild(node) {
+        var kind = node.kind;
+        return kind === 249 /* JsxElement */
+            || kind === 256 /* JsxExpression */
+            || kind === 250 /* JsxSelfClosingElement */
+            || kind === 10 /* JsxText */;
+    }
+    ts.isJsxChild = isJsxChild;
+    /* @internal */
+    function isJsxAttributeLike(node) {
+        var kind = node.kind;
+        return kind === 253 /* JsxAttribute */
+            || kind === 255 /* JsxSpreadAttribute */;
+    }
+    ts.isJsxAttributeLike = isJsxAttributeLike;
+    /* @internal */
+    function isStringLiteralOrJsxExpression(node) {
+        var kind = node.kind;
+        return kind === 9 /* StringLiteral */
+            || kind === 256 /* JsxExpression */;
+    }
+    ts.isStringLiteralOrJsxExpression = isStringLiteralOrJsxExpression;
+    function isJsxOpeningLikeElement(node) {
+        var kind = node.kind;
+        return kind === 251 /* JsxOpeningElement */
+            || kind === 250 /* JsxSelfClosingElement */;
+    }
+    ts.isJsxOpeningLikeElement = isJsxOpeningLikeElement;
+    // Clauses
+    function isCaseOrDefaultClause(node) {
+        var kind = node.kind;
+        return kind === 257 /* CaseClause */
+            || kind === 258 /* DefaultClause */;
+    }
+    ts.isCaseOrDefaultClause = isCaseOrDefaultClause;
+    // JSDoc
+    /** True if node is of some JSDoc syntax kind. */
+    /* @internal */
+    function isJSDocNode(node) {
+        return node.kind >= 267 /* FirstJSDocNode */ && node.kind <= 294 /* LastJSDocNode */;
+    }
+    ts.isJSDocNode = isJSDocNode;
+    /** True if node is of a kind that may contain comment text. */
+    function isJSDocCommentContainingNode(node) {
+        return node.kind === 283 /* JSDocComment */ || isJSDocTag(node);
+    }
+    ts.isJSDocCommentContainingNode = isJSDocCommentContainingNode;
+    // TODO: determine what this does before making it public.
+    /* @internal */
+    function isJSDocTag(node) {
+        return node.kind >= 284 /* FirstJSDocTagNode */ && node.kind <= 294 /* LastJSDocTagNode */;
+    }
+    ts.isJSDocTag = isJSDocTag;
+})(ts || (ts = {}));
+// <auto-generated />
+/// <reference path="types.ts" />
+/* @internal */
+var ts;
+(function (ts) {
+    ts.Diagnostics = {
+        Unterminated_string_literal: { code: 1002, category: ts.DiagnosticCategory.Error, key: "Unterminated_string_literal_1002", message: "Unterminated string literal." },
+        Identifier_expected: { code: 1003, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_1003", message: "Identifier expected." },
+        _0_expected: { code: 1005, category: ts.DiagnosticCategory.Error, key: "_0_expected_1005", message: "'{0}' expected." },
+        A_file_cannot_have_a_reference_to_itself: { code: 1006, category: ts.DiagnosticCategory.Error, key: "A_file_cannot_have_a_reference_to_itself_1006", message: "A file cannot have a reference to itself." },
+        Trailing_comma_not_allowed: { code: 1009, category: ts.DiagnosticCategory.Error, key: "Trailing_comma_not_allowed_1009", message: "Trailing comma not allowed." },
+        Asterisk_Slash_expected: { code: 1010, category: ts.DiagnosticCategory.Error, key: "Asterisk_Slash_expected_1010", message: "'*/' expected." },
+        Unexpected_token: { code: 1012, category: ts.DiagnosticCategory.Error, key: "Unexpected_token_1012", message: "Unexpected token." },
+        A_rest_parameter_must_be_last_in_a_parameter_list: { code: 1014, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_must_be_last_in_a_parameter_list_1014", message: "A rest parameter must be last in a parameter list." },
+        Parameter_cannot_have_question_mark_and_initializer: { code: 1015, category: ts.DiagnosticCategory.Error, key: "Parameter_cannot_have_question_mark_and_initializer_1015", message: "Parameter cannot have question mark and initializer." },
+        A_required_parameter_cannot_follow_an_optional_parameter: { code: 1016, category: ts.DiagnosticCategory.Error, key: "A_required_parameter_cannot_follow_an_optional_parameter_1016", message: "A required parameter cannot follow an optional parameter." },
+        An_index_signature_cannot_have_a_rest_parameter: { code: 1017, category: ts.DiagnosticCategory.Error, key: "An_index_signature_cannot_have_a_rest_parameter_1017", message: "An index signature cannot have a rest parameter." },
+        An_index_signature_parameter_cannot_have_an_accessibility_modifier: { code: 1018, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_cannot_have_an_accessibility_modifier_1018", message: "An index signature parameter cannot have an accessibility modifier." },
+        An_index_signature_parameter_cannot_have_a_question_mark: { code: 1019, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_cannot_have_a_question_mark_1019", message: "An index signature parameter cannot have a question mark." },
+        An_index_signature_parameter_cannot_have_an_initializer: { code: 1020, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_cannot_have_an_initializer_1020", message: "An index signature parameter cannot have an initializer." },
+        An_index_signature_must_have_a_type_annotation: { code: 1021, category: ts.DiagnosticCategory.Error, key: "An_index_signature_must_have_a_type_annotation_1021", message: "An index signature must have a type annotation." },
+        An_index_signature_parameter_must_have_a_type_annotation: { code: 1022, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_must_have_a_type_annotation_1022", message: "An index signature parameter must have a type annotation." },
+        An_index_signature_parameter_type_must_be_string_or_number: { code: 1023, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_type_must_be_string_or_number_1023", message: "An index signature parameter type must be 'string' or 'number'." },
+        readonly_modifier_can_only_appear_on_a_property_declaration_or_index_signature: { code: 1024, category: ts.DiagnosticCategory.Error, key: "readonly_modifier_can_only_appear_on_a_property_declaration_or_index_signature_1024", message: "'readonly' modifier can only appear on a property declaration or index signature." },
+        Accessibility_modifier_already_seen: { code: 1028, category: ts.DiagnosticCategory.Error, key: "Accessibility_modifier_already_seen_1028", message: "Accessibility modifier already seen." },
+        _0_modifier_must_precede_1_modifier: { code: 1029, category: ts.DiagnosticCategory.Error, key: "_0_modifier_must_precede_1_modifier_1029", message: "'{0}' modifier must precede '{1}' modifier." },
+        _0_modifier_already_seen: { code: 1030, category: ts.DiagnosticCategory.Error, key: "_0_modifier_already_seen_1030", message: "'{0}' modifier already seen." },
+        _0_modifier_cannot_appear_on_a_class_element: { code: 1031, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_class_element_1031", message: "'{0}' modifier cannot appear on a class element." },
+        super_must_be_followed_by_an_argument_list_or_member_access: { code: 1034, category: ts.DiagnosticCategory.Error, key: "super_must_be_followed_by_an_argument_list_or_member_access_1034", message: "'super' must be followed by an argument list or member access." },
+        Only_ambient_modules_can_use_quoted_names: { code: 1035, category: ts.DiagnosticCategory.Error, key: "Only_ambient_modules_can_use_quoted_names_1035", message: "Only ambient modules can use quoted names." },
+        Statements_are_not_allowed_in_ambient_contexts: { code: 1036, category: ts.DiagnosticCategory.Error, key: "Statements_are_not_allowed_in_ambient_contexts_1036", message: "Statements are not allowed in ambient contexts." },
+        A_declare_modifier_cannot_be_used_in_an_already_ambient_context: { code: 1038, category: ts.DiagnosticCategory.Error, key: "A_declare_modifier_cannot_be_used_in_an_already_ambient_context_1038", message: "A 'declare' modifier cannot be used in an already ambient context." },
+        Initializers_are_not_allowed_in_ambient_contexts: { code: 1039, category: ts.DiagnosticCategory.Error, key: "Initializers_are_not_allowed_in_ambient_contexts_1039", message: "Initializers are not allowed in ambient contexts." },
+        _0_modifier_cannot_be_used_in_an_ambient_context: { code: 1040, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_in_an_ambient_context_1040", message: "'{0}' modifier cannot be used in an ambient context." },
+        _0_modifier_cannot_be_used_with_a_class_declaration: { code: 1041, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_with_a_class_declaration_1041", message: "'{0}' modifier cannot be used with a class declaration." },
+        _0_modifier_cannot_be_used_here: { code: 1042, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_here_1042", message: "'{0}' modifier cannot be used here." },
+        _0_modifier_cannot_appear_on_a_data_property: { code: 1043, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_data_property_1043", message: "'{0}' modifier cannot appear on a data property." },
+        _0_modifier_cannot_appear_on_a_module_or_namespace_element: { code: 1044, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_module_or_namespace_element_1044", message: "'{0}' modifier cannot appear on a module or namespace element." },
+        A_0_modifier_cannot_be_used_with_an_interface_declaration: { code: 1045, category: ts.DiagnosticCategory.Error, key: "A_0_modifier_cannot_be_used_with_an_interface_declaration_1045", message: "A '{0}' modifier cannot be used with an interface declaration." },
+        A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file: { code: 1046, category: ts.DiagnosticCategory.Error, key: "A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file_1046", message: "A 'declare' modifier is required for a top level declaration in a .d.ts file." },
+        A_rest_parameter_cannot_be_optional: { code: 1047, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_cannot_be_optional_1047", message: "A rest parameter cannot be optional." },
+        A_rest_parameter_cannot_have_an_initializer: { code: 1048, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_cannot_have_an_initializer_1048", message: "A rest parameter cannot have an initializer." },
+        A_set_accessor_must_have_exactly_one_parameter: { code: 1049, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_must_have_exactly_one_parameter_1049", message: "A 'set' accessor must have exactly one parameter." },
+        A_set_accessor_cannot_have_an_optional_parameter: { code: 1051, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_cannot_have_an_optional_parameter_1051", message: "A 'set' accessor cannot have an optional parameter." },
+        A_set_accessor_parameter_cannot_have_an_initializer: { code: 1052, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_parameter_cannot_have_an_initializer_1052", message: "A 'set' accessor parameter cannot have an initializer." },
+        A_set_accessor_cannot_have_rest_parameter: { code: 1053, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_cannot_have_rest_parameter_1053", message: "A 'set' accessor cannot have rest parameter." },
+        A_get_accessor_cannot_have_parameters: { code: 1054, category: ts.DiagnosticCategory.Error, key: "A_get_accessor_cannot_have_parameters_1054", message: "A 'get' accessor cannot have parameters." },
+        Type_0_is_not_a_valid_async_function_return_type_in_ES5_SlashES3_because_it_does_not_refer_to_a_Promise_compatible_constructor_value: { code: 1055, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_a_valid_async_function_return_type_in_ES5_SlashES3_because_it_does_not_refer_to_a_Prom_1055", message: "Type '{0}' is not a valid async function return type in ES5/ES3 because it does not refer to a Promise-compatible constructor value." },
+        Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher: { code: 1056, category: ts.DiagnosticCategory.Error, key: "Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher_1056", message: "Accessors are only available when targeting ECMAScript 5 and higher." },
+        An_async_function_or_method_must_have_a_valid_awaitable_return_type: { code: 1057, category: ts.DiagnosticCategory.Error, key: "An_async_function_or_method_must_have_a_valid_awaitable_return_type_1057", message: "An async function or method must have a valid awaitable return type." },
+        The_return_type_of_an_async_function_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member: { code: 1058, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_an_async_function_must_either_be_a_valid_promise_or_must_not_contain_a_callable_t_1058", message: "The return type of an async function must either be a valid promise or must not contain a callable 'then' member." },
+        A_promise_must_have_a_then_method: { code: 1059, category: ts.DiagnosticCategory.Error, key: "A_promise_must_have_a_then_method_1059", message: "A promise must have a 'then' method." },
+        The_first_parameter_of_the_then_method_of_a_promise_must_be_a_callback: { code: 1060, category: ts.DiagnosticCategory.Error, key: "The_first_parameter_of_the_then_method_of_a_promise_must_be_a_callback_1060", message: "The first parameter of the 'then' method of a promise must be a callback." },
+        Enum_member_must_have_initializer: { code: 1061, category: ts.DiagnosticCategory.Error, key: "Enum_member_must_have_initializer_1061", message: "Enum member must have initializer." },
+        Type_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method: { code: 1062, category: ts.DiagnosticCategory.Error, key: "Type_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method_1062", message: "Type is referenced directly or indirectly in the fulfillment callback of its own 'then' method." },
+        An_export_assignment_cannot_be_used_in_a_namespace: { code: 1063, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_cannot_be_used_in_a_namespace_1063", message: "An export assignment cannot be used in a namespace." },
+        The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type: { code: 1064, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type_1064", message: "The return type of an async function or method must be the global Promise<T> type." },
+        In_ambient_enum_declarations_member_initializer_must_be_constant_expression: { code: 1066, category: ts.DiagnosticCategory.Error, key: "In_ambient_enum_declarations_member_initializer_must_be_constant_expression_1066", message: "In ambient enum declarations member initializer must be constant expression." },
+        Unexpected_token_A_constructor_method_accessor_or_property_was_expected: { code: 1068, category: ts.DiagnosticCategory.Error, key: "Unexpected_token_A_constructor_method_accessor_or_property_was_expected_1068", message: "Unexpected token. A constructor, method, accessor, or property was expected." },
+        _0_modifier_cannot_appear_on_a_type_member: { code: 1070, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_type_member_1070", message: "'{0}' modifier cannot appear on a type member." },
+        _0_modifier_cannot_appear_on_an_index_signature: { code: 1071, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_an_index_signature_1071", message: "'{0}' modifier cannot appear on an index signature." },
+        A_0_modifier_cannot_be_used_with_an_import_declaration: { code: 1079, category: ts.DiagnosticCategory.Error, key: "A_0_modifier_cannot_be_used_with_an_import_declaration_1079", message: "A '{0}' modifier cannot be used with an import declaration." },
+        Invalid_reference_directive_syntax: { code: 1084, category: ts.DiagnosticCategory.Error, key: "Invalid_reference_directive_syntax_1084", message: "Invalid 'reference' directive syntax." },
+        Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher_Use_the_syntax_0: { code: 1085, category: ts.DiagnosticCategory.Error, key: "Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher_Use_the_syntax_0_1085", message: "Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '{0}'." },
+        An_accessor_cannot_be_declared_in_an_ambient_context: { code: 1086, category: ts.DiagnosticCategory.Error, key: "An_accessor_cannot_be_declared_in_an_ambient_context_1086", message: "An accessor cannot be declared in an ambient context." },
+        _0_modifier_cannot_appear_on_a_constructor_declaration: { code: 1089, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_constructor_declaration_1089", message: "'{0}' modifier cannot appear on a constructor declaration." },
+        _0_modifier_cannot_appear_on_a_parameter: { code: 1090, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_parameter_1090", message: "'{0}' modifier cannot appear on a parameter." },
+        Only_a_single_variable_declaration_is_allowed_in_a_for_in_statement: { code: 1091, category: ts.DiagnosticCategory.Error, key: "Only_a_single_variable_declaration_is_allowed_in_a_for_in_statement_1091", message: "Only a single variable declaration is allowed in a 'for...in' statement." },
+        Type_parameters_cannot_appear_on_a_constructor_declaration: { code: 1092, category: ts.DiagnosticCategory.Error, key: "Type_parameters_cannot_appear_on_a_constructor_declaration_1092", message: "Type parameters cannot appear on a constructor declaration." },
+        Type_annotation_cannot_appear_on_a_constructor_declaration: { code: 1093, category: ts.DiagnosticCategory.Error, key: "Type_annotation_cannot_appear_on_a_constructor_declaration_1093", message: "Type annotation cannot appear on a constructor declaration." },
+        An_accessor_cannot_have_type_parameters: { code: 1094, category: ts.DiagnosticCategory.Error, key: "An_accessor_cannot_have_type_parameters_1094", message: "An accessor cannot have type parameters." },
+        A_set_accessor_cannot_have_a_return_type_annotation: { code: 1095, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_cannot_have_a_return_type_annotation_1095", message: "A 'set' accessor cannot have a return type annotation." },
+        An_index_signature_must_have_exactly_one_parameter: { code: 1096, category: ts.DiagnosticCategory.Error, key: "An_index_signature_must_have_exactly_one_parameter_1096", message: "An index signature must have exactly one parameter." },
+        _0_list_cannot_be_empty: { code: 1097, category: ts.DiagnosticCategory.Error, key: "_0_list_cannot_be_empty_1097", message: "'{0}' list cannot be empty." },
+        Type_parameter_list_cannot_be_empty: { code: 1098, category: ts.DiagnosticCategory.Error, key: "Type_parameter_list_cannot_be_empty_1098", message: "Type parameter list cannot be empty." },
+        Type_argument_list_cannot_be_empty: { code: 1099, category: ts.DiagnosticCategory.Error, key: "Type_argument_list_cannot_be_empty_1099", message: "Type argument list cannot be empty." },
+        Invalid_use_of_0_in_strict_mode: { code: 1100, category: ts.DiagnosticCategory.Error, key: "Invalid_use_of_0_in_strict_mode_1100", message: "Invalid use of '{0}' in strict mode." },
+        with_statements_are_not_allowed_in_strict_mode: { code: 1101, category: ts.DiagnosticCategory.Error, key: "with_statements_are_not_allowed_in_strict_mode_1101", message: "'with' statements are not allowed in strict mode." },
+        delete_cannot_be_called_on_an_identifier_in_strict_mode: { code: 1102, category: ts.DiagnosticCategory.Error, key: "delete_cannot_be_called_on_an_identifier_in_strict_mode_1102", message: "'delete' cannot be called on an identifier in strict mode." },
+        A_for_await_of_statement_is_only_allowed_within_an_async_function_or_async_generator: { code: 1103, category: ts.DiagnosticCategory.Error, key: "A_for_await_of_statement_is_only_allowed_within_an_async_function_or_async_generator_1103", message: "A 'for-await-of' statement is only allowed within an async function or async generator." },
+        A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement: { code: 1104, category: ts.DiagnosticCategory.Error, key: "A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement_1104", message: "A 'continue' statement can only be used within an enclosing iteration statement." },
+        A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement: { code: 1105, category: ts.DiagnosticCategory.Error, key: "A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement_1105", message: "A 'break' statement can only be used within an enclosing iteration or switch statement." },
+        Jump_target_cannot_cross_function_boundary: { code: 1107, category: ts.DiagnosticCategory.Error, key: "Jump_target_cannot_cross_function_boundary_1107", message: "Jump target cannot cross function boundary." },
+        A_return_statement_can_only_be_used_within_a_function_body: { code: 1108, category: ts.DiagnosticCategory.Error, key: "A_return_statement_can_only_be_used_within_a_function_body_1108", message: "A 'return' statement can only be used within a function body." },
+        Expression_expected: { code: 1109, category: ts.DiagnosticCategory.Error, key: "Expression_expected_1109", message: "Expression expected." },
+        Type_expected: { code: 1110, category: ts.DiagnosticCategory.Error, key: "Type_expected_1110", message: "Type expected." },
+        A_default_clause_cannot_appear_more_than_once_in_a_switch_statement: { code: 1113, category: ts.DiagnosticCategory.Error, key: "A_default_clause_cannot_appear_more_than_once_in_a_switch_statement_1113", message: "A 'default' clause cannot appear more than once in a 'switch' statement." },
+        Duplicate_label_0: { code: 1114, category: ts.DiagnosticCategory.Error, key: "Duplicate_label_0_1114", message: "Duplicate label '{0}'." },
+        A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement: { code: 1115, category: ts.DiagnosticCategory.Error, key: "A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement_1115", message: "A 'continue' statement can only jump to a label of an enclosing iteration statement." },
+        A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement: { code: 1116, category: ts.DiagnosticCategory.Error, key: "A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement_1116", message: "A 'break' statement can only jump to a label of an enclosing statement." },
+        An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode: { code: 1117, category: ts.DiagnosticCategory.Error, key: "An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode_1117", message: "An object literal cannot have multiple properties with the same name in strict mode." },
+        An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name: { code: 1118, category: ts.DiagnosticCategory.Error, key: "An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name_1118", message: "An object literal cannot have multiple get/set accessors with the same name." },
+        An_object_literal_cannot_have_property_and_accessor_with_the_same_name: { code: 1119, category: ts.DiagnosticCategory.Error, key: "An_object_literal_cannot_have_property_and_accessor_with_the_same_name_1119", message: "An object literal cannot have property and accessor with the same name." },
+        An_export_assignment_cannot_have_modifiers: { code: 1120, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_cannot_have_modifiers_1120", message: "An export assignment cannot have modifiers." },
+        Octal_literals_are_not_allowed_in_strict_mode: { code: 1121, category: ts.DiagnosticCategory.Error, key: "Octal_literals_are_not_allowed_in_strict_mode_1121", message: "Octal literals are not allowed in strict mode." },
+        A_tuple_type_element_list_cannot_be_empty: { code: 1122, category: ts.DiagnosticCategory.Error, key: "A_tuple_type_element_list_cannot_be_empty_1122", message: "A tuple type element list cannot be empty." },
+        Variable_declaration_list_cannot_be_empty: { code: 1123, category: ts.DiagnosticCategory.Error, key: "Variable_declaration_list_cannot_be_empty_1123", message: "Variable declaration list cannot be empty." },
+        Digit_expected: { code: 1124, category: ts.DiagnosticCategory.Error, key: "Digit_expected_1124", message: "Digit expected." },
+        Hexadecimal_digit_expected: { code: 1125, category: ts.DiagnosticCategory.Error, key: "Hexadecimal_digit_expected_1125", message: "Hexadecimal digit expected." },
+        Unexpected_end_of_text: { code: 1126, category: ts.DiagnosticCategory.Error, key: "Unexpected_end_of_text_1126", message: "Unexpected end of text." },
+        Invalid_character: { code: 1127, category: ts.DiagnosticCategory.Error, key: "Invalid_character_1127", message: "Invalid character." },
+        Declaration_or_statement_expected: { code: 1128, category: ts.DiagnosticCategory.Error, key: "Declaration_or_statement_expected_1128", message: "Declaration or statement expected." },
+        Statement_expected: { code: 1129, category: ts.DiagnosticCategory.Error, key: "Statement_expected_1129", message: "Statement expected." },
+        case_or_default_expected: { code: 1130, category: ts.DiagnosticCategory.Error, key: "case_or_default_expected_1130", message: "'case' or 'default' expected." },
+        Property_or_signature_expected: { code: 1131, category: ts.DiagnosticCategory.Error, key: "Property_or_signature_expected_1131", message: "Property or signature expected." },
+        Enum_member_expected: { code: 1132, category: ts.DiagnosticCategory.Error, key: "Enum_member_expected_1132", message: "Enum member expected." },
+        Variable_declaration_expected: { code: 1134, category: ts.DiagnosticCategory.Error, key: "Variable_declaration_expected_1134", message: "Variable declaration expected." },
+        Argument_expression_expected: { code: 1135, category: ts.DiagnosticCategory.Error, key: "Argument_expression_expected_1135", message: "Argument expression expected." },
+        Property_assignment_expected: { code: 1136, category: ts.DiagnosticCategory.Error, key: "Property_assignment_expected_1136", message: "Property assignment expected." },
+        Expression_or_comma_expected: { code: 1137, category: ts.DiagnosticCategory.Error, key: "Expression_or_comma_expected_1137", message: "Expression or comma expected." },
+        Parameter_declaration_expected: { code: 1138, category: ts.DiagnosticCategory.Error, key: "Parameter_declaration_expected_1138", message: "Parameter declaration expected." },
+        Type_parameter_declaration_expected: { code: 1139, category: ts.DiagnosticCategory.Error, key: "Type_parameter_declaration_expected_1139", message: "Type parameter declaration expected." },
+        Type_argument_expected: { code: 1140, category: ts.DiagnosticCategory.Error, key: "Type_argument_expected_1140", message: "Type argument expected." },
+        String_literal_expected: { code: 1141, category: ts.DiagnosticCategory.Error, key: "String_literal_expected_1141", message: "String literal expected." },
+        Line_break_not_permitted_here: { code: 1142, category: ts.DiagnosticCategory.Error, key: "Line_break_not_permitted_here_1142", message: "Line break not permitted here." },
+        or_expected: { code: 1144, category: ts.DiagnosticCategory.Error, key: "or_expected_1144", message: "'{' or ';' expected." },
+        Declaration_expected: { code: 1146, category: ts.DiagnosticCategory.Error, key: "Declaration_expected_1146", message: "Declaration expected." },
+        Import_declarations_in_a_namespace_cannot_reference_a_module: { code: 1147, category: ts.DiagnosticCategory.Error, key: "Import_declarations_in_a_namespace_cannot_reference_a_module_1147", message: "Import declarations in a namespace cannot reference a module." },
+        Cannot_use_imports_exports_or_module_augmentations_when_module_is_none: { code: 1148, category: ts.DiagnosticCategory.Error, key: "Cannot_use_imports_exports_or_module_augmentations_when_module_is_none_1148", message: "Cannot use imports, exports, or module augmentations when '--module' is 'none'." },
+        File_name_0_differs_from_already_included_file_name_1_only_in_casing: { code: 1149, category: ts.DiagnosticCategory.Error, key: "File_name_0_differs_from_already_included_file_name_1_only_in_casing_1149", message: "File name '{0}' differs from already included file name '{1}' only in casing." },
+        new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead: { code: 1150, category: ts.DiagnosticCategory.Error, key: "new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead_1150", message: "'new T[]' cannot be used to create an array. Use 'new Array<T>()' instead." },
+        const_declarations_must_be_initialized: { code: 1155, category: ts.DiagnosticCategory.Error, key: "const_declarations_must_be_initialized_1155", message: "'const' declarations must be initialized." },
+        const_declarations_can_only_be_declared_inside_a_block: { code: 1156, category: ts.DiagnosticCategory.Error, key: "const_declarations_can_only_be_declared_inside_a_block_1156", message: "'const' declarations can only be declared inside a block." },
+        let_declarations_can_only_be_declared_inside_a_block: { code: 1157, category: ts.DiagnosticCategory.Error, key: "let_declarations_can_only_be_declared_inside_a_block_1157", message: "'let' declarations can only be declared inside a block." },
+        Unterminated_template_literal: { code: 1160, category: ts.DiagnosticCategory.Error, key: "Unterminated_template_literal_1160", message: "Unterminated template literal." },
+        Unterminated_regular_expression_literal: { code: 1161, category: ts.DiagnosticCategory.Error, key: "Unterminated_regular_expression_literal_1161", message: "Unterminated regular expression literal." },
+        An_object_member_cannot_be_declared_optional: { code: 1162, category: ts.DiagnosticCategory.Error, key: "An_object_member_cannot_be_declared_optional_1162", message: "An object member cannot be declared optional." },
+        A_yield_expression_is_only_allowed_in_a_generator_body: { code: 1163, category: ts.DiagnosticCategory.Error, key: "A_yield_expression_is_only_allowed_in_a_generator_body_1163", message: "A 'yield' expression is only allowed in a generator body." },
+        Computed_property_names_are_not_allowed_in_enums: { code: 1164, category: ts.DiagnosticCategory.Error, key: "Computed_property_names_are_not_allowed_in_enums_1164", message: "Computed property names are not allowed in enums." },
+        A_computed_property_name_in_an_ambient_context_must_directly_refer_to_a_built_in_symbol: { code: 1165, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_an_ambient_context_must_directly_refer_to_a_built_in_symbol_1165", message: "A computed property name in an ambient context must directly refer to a built-in symbol." },
+        A_computed_property_name_in_a_class_property_declaration_must_directly_refer_to_a_built_in_symbol: { code: 1166, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_a_class_property_declaration_must_directly_refer_to_a_built_in_symbol_1166", message: "A computed property name in a class property declaration must directly refer to a built-in symbol." },
+        A_computed_property_name_in_a_method_overload_must_directly_refer_to_a_built_in_symbol: { code: 1168, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_a_method_overload_must_directly_refer_to_a_built_in_symbol_1168", message: "A computed property name in a method overload must directly refer to a built-in symbol." },
+        A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol: { code: 1169, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol_1169", message: "A computed property name in an interface must directly refer to a built-in symbol." },
+        A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol: { code: 1170, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol_1170", message: "A computed property name in a type literal must directly refer to a built-in symbol." },
+        A_comma_expression_is_not_allowed_in_a_computed_property_name: { code: 1171, category: ts.DiagnosticCategory.Error, key: "A_comma_expression_is_not_allowed_in_a_computed_property_name_1171", message: "A comma expression is not allowed in a computed property name." },
+        extends_clause_already_seen: { code: 1172, category: ts.DiagnosticCategory.Error, key: "extends_clause_already_seen_1172", message: "'extends' clause already seen." },
+        extends_clause_must_precede_implements_clause: { code: 1173, category: ts.DiagnosticCategory.Error, key: "extends_clause_must_precede_implements_clause_1173", message: "'extends' clause must precede 'implements' clause." },
+        Classes_can_only_extend_a_single_class: { code: 1174, category: ts.DiagnosticCategory.Error, key: "Classes_can_only_extend_a_single_class_1174", message: "Classes can only extend a single class." },
+        implements_clause_already_seen: { code: 1175, category: ts.DiagnosticCategory.Error, key: "implements_clause_already_seen_1175", message: "'implements' clause already seen." },
+        Interface_declaration_cannot_have_implements_clause: { code: 1176, category: ts.DiagnosticCategory.Error, key: "Interface_declaration_cannot_have_implements_clause_1176", message: "Interface declaration cannot have 'implements' clause." },
+        Binary_digit_expected: { code: 1177, category: ts.DiagnosticCategory.Error, key: "Binary_digit_expected_1177", message: "Binary digit expected." },
+        Octal_digit_expected: { code: 1178, category: ts.DiagnosticCategory.Error, key: "Octal_digit_expected_1178", message: "Octal digit expected." },
+        Unexpected_token_expected: { code: 1179, category: ts.DiagnosticCategory.Error, key: "Unexpected_token_expected_1179", message: "Unexpected token. '{' expected." },
+        Property_destructuring_pattern_expected: { code: 1180, category: ts.DiagnosticCategory.Error, key: "Property_destructuring_pattern_expected_1180", message: "Property destructuring pattern expected." },
+        Array_element_destructuring_pattern_expected: { code: 1181, category: ts.DiagnosticCategory.Error, key: "Array_element_destructuring_pattern_expected_1181", message: "Array element destructuring pattern expected." },
+        A_destructuring_declaration_must_have_an_initializer: { code: 1182, category: ts.DiagnosticCategory.Error, key: "A_destructuring_declaration_must_have_an_initializer_1182", message: "A destructuring declaration must have an initializer." },
+        An_implementation_cannot_be_declared_in_ambient_contexts: { code: 1183, category: ts.DiagnosticCategory.Error, key: "An_implementation_cannot_be_declared_in_ambient_contexts_1183", message: "An implementation cannot be declared in ambient contexts." },
+        Modifiers_cannot_appear_here: { code: 1184, category: ts.DiagnosticCategory.Error, key: "Modifiers_cannot_appear_here_1184", message: "Modifiers cannot appear here." },
+        Merge_conflict_marker_encountered: { code: 1185, category: ts.DiagnosticCategory.Error, key: "Merge_conflict_marker_encountered_1185", message: "Merge conflict marker encountered." },
+        A_rest_element_cannot_have_an_initializer: { code: 1186, category: ts.DiagnosticCategory.Error, key: "A_rest_element_cannot_have_an_initializer_1186", message: "A rest element cannot have an initializer." },
+        A_parameter_property_may_not_be_declared_using_a_binding_pattern: { code: 1187, category: ts.DiagnosticCategory.Error, key: "A_parameter_property_may_not_be_declared_using_a_binding_pattern_1187", message: "A parameter property may not be declared using a binding pattern." },
+        Only_a_single_variable_declaration_is_allowed_in_a_for_of_statement: { code: 1188, category: ts.DiagnosticCategory.Error, key: "Only_a_single_variable_declaration_is_allowed_in_a_for_of_statement_1188", message: "Only a single variable declaration is allowed in a 'for...of' statement." },
+        The_variable_declaration_of_a_for_in_statement_cannot_have_an_initializer: { code: 1189, category: ts.DiagnosticCategory.Error, key: "The_variable_declaration_of_a_for_in_statement_cannot_have_an_initializer_1189", message: "The variable declaration of a 'for...in' statement cannot have an initializer." },
+        The_variable_declaration_of_a_for_of_statement_cannot_have_an_initializer: { code: 1190, category: ts.DiagnosticCategory.Error, key: "The_variable_declaration_of_a_for_of_statement_cannot_have_an_initializer_1190", message: "The variable declaration of a 'for...of' statement cannot have an initializer." },
+        An_import_declaration_cannot_have_modifiers: { code: 1191, category: ts.DiagnosticCategory.Error, key: "An_import_declaration_cannot_have_modifiers_1191", message: "An import declaration cannot have modifiers." },
+        Module_0_has_no_default_export: { code: 1192, category: ts.DiagnosticCategory.Error, key: "Module_0_has_no_default_export_1192", message: "Module '{0}' has no default export." },
+        An_export_declaration_cannot_have_modifiers: { code: 1193, category: ts.DiagnosticCategory.Error, key: "An_export_declaration_cannot_have_modifiers_1193", message: "An export declaration cannot have modifiers." },
+        Export_declarations_are_not_permitted_in_a_namespace: { code: 1194, category: ts.DiagnosticCategory.Error, key: "Export_declarations_are_not_permitted_in_a_namespace_1194", message: "Export declarations are not permitted in a namespace." },
+        Catch_clause_variable_cannot_have_a_type_annotation: { code: 1196, category: ts.DiagnosticCategory.Error, key: "Catch_clause_variable_cannot_have_a_type_annotation_1196", message: "Catch clause variable cannot have a type annotation." },
+        Catch_clause_variable_cannot_have_an_initializer: { code: 1197, category: ts.DiagnosticCategory.Error, key: "Catch_clause_variable_cannot_have_an_initializer_1197", message: "Catch clause variable cannot have an initializer." },
+        An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive: { code: 1198, category: ts.DiagnosticCategory.Error, key: "An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive_1198", message: "An extended Unicode escape value must be between 0x0 and 0x10FFFF inclusive." },
+        Unterminated_Unicode_escape_sequence: { code: 1199, category: ts.DiagnosticCategory.Error, key: "Unterminated_Unicode_escape_sequence_1199", message: "Unterminated Unicode escape sequence." },
+        Line_terminator_not_permitted_before_arrow: { code: 1200, category: ts.DiagnosticCategory.Error, key: "Line_terminator_not_permitted_before_arrow_1200", message: "Line terminator not permitted before arrow." },
+        Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead: { code: 1202, category: ts.DiagnosticCategory.Error, key: "Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asteri_1202", message: "Import assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'import * as ns from \"mod\"', 'import {a} from \"mod\"', 'import d from \"mod\"', or another module format instead." },
+        Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_or_another_module_format_instead: { code: 1203, category: ts.DiagnosticCategory.Error, key: "Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_defaul_1203", message: "Export assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'export default' or another module format instead." },
+        Cannot_re_export_a_type_when_the_isolatedModules_flag_is_provided: { code: 1205, category: ts.DiagnosticCategory.Error, key: "Cannot_re_export_a_type_when_the_isolatedModules_flag_is_provided_1205", message: "Cannot re-export a type when the '--isolatedModules' flag is provided." },
+        Decorators_are_not_valid_here: { code: 1206, category: ts.DiagnosticCategory.Error, key: "Decorators_are_not_valid_here_1206", message: "Decorators are not valid here." },
+        Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name: { code: 1207, category: ts.DiagnosticCategory.Error, key: "Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name_1207", message: "Decorators cannot be applied to multiple get/set accessors of the same name." },
+        Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided: { code: 1208, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided_1208", message: "Cannot compile namespaces when the '--isolatedModules' flag is provided." },
+        Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided: { code: 1209, category: ts.DiagnosticCategory.Error, key: "Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided_1209", message: "Ambient const enums are not allowed when the '--isolatedModules' flag is provided." },
+        Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode: { code: 1210, category: ts.DiagnosticCategory.Error, key: "Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode_1210", message: "Invalid use of '{0}'. Class definitions are automatically in strict mode." },
+        A_class_declaration_without_the_default_modifier_must_have_a_name: { code: 1211, category: ts.DiagnosticCategory.Error, key: "A_class_declaration_without_the_default_modifier_must_have_a_name_1211", message: "A class declaration without the 'default' modifier must have a name." },
+        Identifier_expected_0_is_a_reserved_word_in_strict_mode: { code: 1212, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_0_is_a_reserved_word_in_strict_mode_1212", message: "Identifier expected. '{0}' is a reserved word in strict mode." },
+        Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_strict_mode: { code: 1213, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_stric_1213", message: "Identifier expected. '{0}' is a reserved word in strict mode. Class definitions are automatically in strict mode." },
+        Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode: { code: 1214, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode_1214", message: "Identifier expected. '{0}' is a reserved word in strict mode. Modules are automatically in strict mode." },
+        Invalid_use_of_0_Modules_are_automatically_in_strict_mode: { code: 1215, category: ts.DiagnosticCategory.Error, key: "Invalid_use_of_0_Modules_are_automatically_in_strict_mode_1215", message: "Invalid use of '{0}'. Modules are automatically in strict mode." },
+        Identifier_expected_esModule_is_reserved_as_an_exported_marker_when_transforming_ECMAScript_modules: { code: 1216, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_esModule_is_reserved_as_an_exported_marker_when_transforming_ECMAScript_modules_1216", message: "Identifier expected. '__esModule' is reserved as an exported marker when transforming ECMAScript modules." },
+        Export_assignment_is_not_supported_when_module_flag_is_system: { code: 1218, category: ts.DiagnosticCategory.Error, key: "Export_assignment_is_not_supported_when_module_flag_is_system_1218", message: "Export assignment is not supported when '--module' flag is 'system'." },
+        Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning: { code: 1219, category: ts.DiagnosticCategory.Error, key: "Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_t_1219", message: "Experimental support for decorators is a feature that is subject to change in a future release. Set the 'experimentalDecorators' option to remove this warning." },
+        Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher: { code: 1220, category: ts.DiagnosticCategory.Error, key: "Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher_1220", message: "Generators are only available when targeting ECMAScript 2015 or higher." },
+        Generators_are_not_allowed_in_an_ambient_context: { code: 1221, category: ts.DiagnosticCategory.Error, key: "Generators_are_not_allowed_in_an_ambient_context_1221", message: "Generators are not allowed in an ambient context." },
+        An_overload_signature_cannot_be_declared_as_a_generator: { code: 1222, category: ts.DiagnosticCategory.Error, key: "An_overload_signature_cannot_be_declared_as_a_generator_1222", message: "An overload signature cannot be declared as a generator." },
+        _0_tag_already_specified: { code: 1223, category: ts.DiagnosticCategory.Error, key: "_0_tag_already_specified_1223", message: "'{0}' tag already specified." },
+        Signature_0_must_have_a_type_predicate: { code: 1224, category: ts.DiagnosticCategory.Error, key: "Signature_0_must_have_a_type_predicate_1224", message: "Signature '{0}' must have a type predicate." },
+        Cannot_find_parameter_0: { code: 1225, category: ts.DiagnosticCategory.Error, key: "Cannot_find_parameter_0_1225", message: "Cannot find parameter '{0}'." },
+        Type_predicate_0_is_not_assignable_to_1: { code: 1226, category: ts.DiagnosticCategory.Error, key: "Type_predicate_0_is_not_assignable_to_1_1226", message: "Type predicate '{0}' is not assignable to '{1}'." },
+        Parameter_0_is_not_in_the_same_position_as_parameter_1: { code: 1227, category: ts.DiagnosticCategory.Error, key: "Parameter_0_is_not_in_the_same_position_as_parameter_1_1227", message: "Parameter '{0}' is not in the same position as parameter '{1}'." },
+        A_type_predicate_is_only_allowed_in_return_type_position_for_functions_and_methods: { code: 1228, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_is_only_allowed_in_return_type_position_for_functions_and_methods_1228", message: "A type predicate is only allowed in return type position for functions and methods." },
+        A_type_predicate_cannot_reference_a_rest_parameter: { code: 1229, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_cannot_reference_a_rest_parameter_1229", message: "A type predicate cannot reference a rest parameter." },
+        A_type_predicate_cannot_reference_element_0_in_a_binding_pattern: { code: 1230, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_cannot_reference_element_0_in_a_binding_pattern_1230", message: "A type predicate cannot reference element '{0}' in a binding pattern." },
+        An_export_assignment_can_only_be_used_in_a_module: { code: 1231, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_can_only_be_used_in_a_module_1231", message: "An export assignment can only be used in a module." },
+        An_import_declaration_can_only_be_used_in_a_namespace_or_module: { code: 1232, category: ts.DiagnosticCategory.Error, key: "An_import_declaration_can_only_be_used_in_a_namespace_or_module_1232", message: "An import declaration can only be used in a namespace or module." },
+        An_export_declaration_can_only_be_used_in_a_module: { code: 1233, category: ts.DiagnosticCategory.Error, key: "An_export_declaration_can_only_be_used_in_a_module_1233", message: "An export declaration can only be used in a module." },
+        An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file: { code: 1234, category: ts.DiagnosticCategory.Error, key: "An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file_1234", message: "An ambient module declaration is only allowed at the top level in a file." },
+        A_namespace_declaration_is_only_allowed_in_a_namespace_or_module: { code: 1235, category: ts.DiagnosticCategory.Error, key: "A_namespace_declaration_is_only_allowed_in_a_namespace_or_module_1235", message: "A namespace declaration is only allowed in a namespace or module." },
+        The_return_type_of_a_property_decorator_function_must_be_either_void_or_any: { code: 1236, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_a_property_decorator_function_must_be_either_void_or_any_1236", message: "The return type of a property decorator function must be either 'void' or 'any'." },
+        The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any: { code: 1237, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any_1237", message: "The return type of a parameter decorator function must be either 'void' or 'any'." },
+        Unable_to_resolve_signature_of_class_decorator_when_called_as_an_expression: { code: 1238, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_class_decorator_when_called_as_an_expression_1238", message: "Unable to resolve signature of class decorator when called as an expression." },
+        Unable_to_resolve_signature_of_parameter_decorator_when_called_as_an_expression: { code: 1239, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_parameter_decorator_when_called_as_an_expression_1239", message: "Unable to resolve signature of parameter decorator when called as an expression." },
+        Unable_to_resolve_signature_of_property_decorator_when_called_as_an_expression: { code: 1240, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_property_decorator_when_called_as_an_expression_1240", message: "Unable to resolve signature of property decorator when called as an expression." },
+        Unable_to_resolve_signature_of_method_decorator_when_called_as_an_expression: { code: 1241, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_method_decorator_when_called_as_an_expression_1241", message: "Unable to resolve signature of method decorator when called as an expression." },
+        abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration: { code: 1242, category: ts.DiagnosticCategory.Error, key: "abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration_1242", message: "'abstract' modifier can only appear on a class, method, or property declaration." },
+        _0_modifier_cannot_be_used_with_1_modifier: { code: 1243, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_with_1_modifier_1243", message: "'{0}' modifier cannot be used with '{1}' modifier." },
+        Abstract_methods_can_only_appear_within_an_abstract_class: { code: 1244, category: ts.DiagnosticCategory.Error, key: "Abstract_methods_can_only_appear_within_an_abstract_class_1244", message: "Abstract methods can only appear within an abstract class." },
+        Method_0_cannot_have_an_implementation_because_it_is_marked_abstract: { code: 1245, category: ts.DiagnosticCategory.Error, key: "Method_0_cannot_have_an_implementation_because_it_is_marked_abstract_1245", message: "Method '{0}' cannot have an implementation because it is marked abstract." },
+        An_interface_property_cannot_have_an_initializer: { code: 1246, category: ts.DiagnosticCategory.Error, key: "An_interface_property_cannot_have_an_initializer_1246", message: "An interface property cannot have an initializer." },
+        A_type_literal_property_cannot_have_an_initializer: { code: 1247, category: ts.DiagnosticCategory.Error, key: "A_type_literal_property_cannot_have_an_initializer_1247", message: "A type literal property cannot have an initializer." },
+        A_class_member_cannot_have_the_0_keyword: { code: 1248, category: ts.DiagnosticCategory.Error, key: "A_class_member_cannot_have_the_0_keyword_1248", message: "A class member cannot have the '{0}' keyword." },
+        A_decorator_can_only_decorate_a_method_implementation_not_an_overload: { code: 1249, category: ts.DiagnosticCategory.Error, key: "A_decorator_can_only_decorate_a_method_implementation_not_an_overload_1249", message: "A decorator can only decorate a method implementation, not an overload." },
+        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5: { code: 1250, category: ts.DiagnosticCategory.Error, key: "Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_1250", message: "Function declarations are not allowed inside blocks in strict mode when targeting 'ES3' or 'ES5'." },
+        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Class_definitions_are_automatically_in_strict_mode: { code: 1251, category: ts.DiagnosticCategory.Error, key: "Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Class_d_1251", message: "Function declarations are not allowed inside blocks in strict mode when targeting 'ES3' or 'ES5'. Class definitions are automatically in strict mode." },
+        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_are_automatically_in_strict_mode: { code: 1252, category: ts.DiagnosticCategory.Error, key: "Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_1252", message: "Function declarations are not allowed inside blocks in strict mode when targeting 'ES3' or 'ES5'. Modules are automatically in strict mode." },
+        _0_tag_cannot_be_used_independently_as_a_top_level_JSDoc_tag: { code: 1253, category: ts.DiagnosticCategory.Error, key: "_0_tag_cannot_be_used_independently_as_a_top_level_JSDoc_tag_1253", message: "'{0}' tag cannot be used independently as a top level JSDoc tag." },
+        A_const_initializer_in_an_ambient_context_must_be_a_string_or_numeric_literal: { code: 1254, category: ts.DiagnosticCategory.Error, key: "A_const_initializer_in_an_ambient_context_must_be_a_string_or_numeric_literal_1254", message: "A 'const' initializer in an ambient context must be a string or numeric literal." },
+        with_statements_are_not_allowed_in_an_async_function_block: { code: 1300, category: ts.DiagnosticCategory.Error, key: "with_statements_are_not_allowed_in_an_async_function_block_1300", message: "'with' statements are not allowed in an async function block." },
+        await_expression_is_only_allowed_within_an_async_function: { code: 1308, category: ts.DiagnosticCategory.Error, key: "await_expression_is_only_allowed_within_an_async_function_1308", message: "'await' expression is only allowed within an async function." },
+        can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment: { code: 1312, category: ts.DiagnosticCategory.Error, key: "can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment_1312", message: "'=' can only be used in an object literal property inside a destructuring assignment." },
+        The_body_of_an_if_statement_cannot_be_the_empty_statement: { code: 1313, category: ts.DiagnosticCategory.Error, key: "The_body_of_an_if_statement_cannot_be_the_empty_statement_1313", message: "The body of an 'if' statement cannot be the empty statement." },
+        Global_module_exports_may_only_appear_in_module_files: { code: 1314, category: ts.DiagnosticCategory.Error, key: "Global_module_exports_may_only_appear_in_module_files_1314", message: "Global module exports may only appear in module files." },
+        Global_module_exports_may_only_appear_in_declaration_files: { code: 1315, category: ts.DiagnosticCategory.Error, key: "Global_module_exports_may_only_appear_in_declaration_files_1315", message: "Global module exports may only appear in declaration files." },
+        Global_module_exports_may_only_appear_at_top_level: { code: 1316, category: ts.DiagnosticCategory.Error, key: "Global_module_exports_may_only_appear_at_top_level_1316", message: "Global module exports may only appear at top level." },
+        A_parameter_property_cannot_be_declared_using_a_rest_parameter: { code: 1317, category: ts.DiagnosticCategory.Error, key: "A_parameter_property_cannot_be_declared_using_a_rest_parameter_1317", message: "A parameter property cannot be declared using a rest parameter." },
+        An_abstract_accessor_cannot_have_an_implementation: { code: 1318, category: ts.DiagnosticCategory.Error, key: "An_abstract_accessor_cannot_have_an_implementation_1318", message: "An abstract accessor cannot have an implementation." },
+        A_default_export_can_only_be_used_in_an_ECMAScript_style_module: { code: 1319, category: ts.DiagnosticCategory.Error, key: "A_default_export_can_only_be_used_in_an_ECMAScript_style_module_1319", message: "A default export can only be used in an ECMAScript-style module." },
+        Type_of_await_operand_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member: { code: 1320, category: ts.DiagnosticCategory.Error, key: "Type_of_await_operand_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member_1320", message: "Type of 'await' operand must either be a valid promise or must not contain a callable 'then' member." },
+        Type_of_yield_operand_in_an_async_generator_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member: { code: 1321, category: ts.DiagnosticCategory.Error, key: "Type_of_yield_operand_in_an_async_generator_must_either_be_a_valid_promise_or_must_not_contain_a_cal_1321", message: "Type of 'yield' operand in an async generator must either be a valid promise or must not contain a callable 'then' member." },
+        Type_of_iterated_elements_of_a_yield_Asterisk_operand_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member: { code: 1322, category: ts.DiagnosticCategory.Error, key: "Type_of_iterated_elements_of_a_yield_Asterisk_operand_must_either_be_a_valid_promise_or_must_not_con_1322", message: "Type of iterated elements of a 'yield*' operand must either be a valid promise or must not contain a callable 'then' member." },
+        Dynamic_import_cannot_be_used_when_targeting_ECMAScript_2015_modules: { code: 1323, category: ts.DiagnosticCategory.Error, key: "Dynamic_import_cannot_be_used_when_targeting_ECMAScript_2015_modules_1323", message: "Dynamic import cannot be used when targeting ECMAScript 2015 modules." },
+        Dynamic_import_must_have_one_specifier_as_an_argument: { code: 1324, category: ts.DiagnosticCategory.Error, key: "Dynamic_import_must_have_one_specifier_as_an_argument_1324", message: "Dynamic import must have one specifier as an argument." },
+        Specifier_of_dynamic_import_cannot_be_spread_element: { code: 1325, category: ts.DiagnosticCategory.Error, key: "Specifier_of_dynamic_import_cannot_be_spread_element_1325", message: "Specifier of dynamic import cannot be spread element." },
+        Dynamic_import_cannot_have_type_arguments: { code: 1326, category: ts.DiagnosticCategory.Error, key: "Dynamic_import_cannot_have_type_arguments_1326", message: "Dynamic import cannot have type arguments" },
+        String_literal_with_double_quotes_expected: { code: 1327, category: ts.DiagnosticCategory.Error, key: "String_literal_with_double_quotes_expected_1327", message: "String literal with double quotes expected." },
+        Property_value_can_only_be_string_literal_numeric_literal_true_false_null_object_literal_or_array_literal: { code: 1328, category: ts.DiagnosticCategory.Error, key: "Property_value_can_only_be_string_literal_numeric_literal_true_false_null_object_literal_or_array_li_1328", message: "Property value can only be string literal, numeric literal, 'true', 'false', 'null', object literal or array literal." },
+        Duplicate_identifier_0: { code: 2300, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_2300", message: "Duplicate identifier '{0}'." },
+        Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor: { code: 2301, category: ts.DiagnosticCategory.Error, key: "Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor_2301", message: "Initializer of instance member variable '{0}' cannot reference identifier '{1}' declared in the constructor." },
+        Static_members_cannot_reference_class_type_parameters: { code: 2302, category: ts.DiagnosticCategory.Error, key: "Static_members_cannot_reference_class_type_parameters_2302", message: "Static members cannot reference class type parameters." },
+        Circular_definition_of_import_alias_0: { code: 2303, category: ts.DiagnosticCategory.Error, key: "Circular_definition_of_import_alias_0_2303", message: "Circular definition of import alias '{0}'." },
+        Cannot_find_name_0: { code: 2304, category: ts.DiagnosticCategory.Error, key: "Cannot_find_name_0_2304", message: "Cannot find name '{0}'." },
+        Module_0_has_no_exported_member_1: { code: 2305, category: ts.DiagnosticCategory.Error, key: "Module_0_has_no_exported_member_1_2305", message: "Module '{0}' has no exported member '{1}'." },
+        File_0_is_not_a_module: { code: 2306, category: ts.DiagnosticCategory.Error, key: "File_0_is_not_a_module_2306", message: "File '{0}' is not a module." },
+        Cannot_find_module_0: { code: 2307, category: ts.DiagnosticCategory.Error, key: "Cannot_find_module_0_2307", message: "Cannot find module '{0}'." },
+        Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambiguity: { code: 2308, category: ts.DiagnosticCategory.Error, key: "Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambig_2308", message: "Module {0} has already exported a member named '{1}'. Consider explicitly re-exporting to resolve the ambiguity." },
+        An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements: { code: 2309, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements_2309", message: "An export assignment cannot be used in a module with other exported elements." },
+        Type_0_recursively_references_itself_as_a_base_type: { code: 2310, category: ts.DiagnosticCategory.Error, key: "Type_0_recursively_references_itself_as_a_base_type_2310", message: "Type '{0}' recursively references itself as a base type." },
+        A_class_may_only_extend_another_class: { code: 2311, category: ts.DiagnosticCategory.Error, key: "A_class_may_only_extend_another_class_2311", message: "A class may only extend another class." },
+        An_interface_may_only_extend_a_class_or_another_interface: { code: 2312, category: ts.DiagnosticCategory.Error, key: "An_interface_may_only_extend_a_class_or_another_interface_2312", message: "An interface may only extend a class or another interface." },
+        Type_parameter_0_has_a_circular_constraint: { code: 2313, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_has_a_circular_constraint_2313", message: "Type parameter '{0}' has a circular constraint." },
+        Generic_type_0_requires_1_type_argument_s: { code: 2314, category: ts.DiagnosticCategory.Error, key: "Generic_type_0_requires_1_type_argument_s_2314", message: "Generic type '{0}' requires {1} type argument(s)." },
+        Type_0_is_not_generic: { code: 2315, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_generic_2315", message: "Type '{0}' is not generic." },
+        Global_type_0_must_be_a_class_or_interface_type: { code: 2316, category: ts.DiagnosticCategory.Error, key: "Global_type_0_must_be_a_class_or_interface_type_2316", message: "Global type '{0}' must be a class or interface type." },
+        Global_type_0_must_have_1_type_parameter_s: { code: 2317, category: ts.DiagnosticCategory.Error, key: "Global_type_0_must_have_1_type_parameter_s_2317", message: "Global type '{0}' must have {1} type parameter(s)." },
+        Cannot_find_global_type_0: { code: 2318, category: ts.DiagnosticCategory.Error, key: "Cannot_find_global_type_0_2318", message: "Cannot find global type '{0}'." },
+        Named_property_0_of_types_1_and_2_are_not_identical: { code: 2319, category: ts.DiagnosticCategory.Error, key: "Named_property_0_of_types_1_and_2_are_not_identical_2319", message: "Named property '{0}' of types '{1}' and '{2}' are not identical." },
+        Interface_0_cannot_simultaneously_extend_types_1_and_2: { code: 2320, category: ts.DiagnosticCategory.Error, key: "Interface_0_cannot_simultaneously_extend_types_1_and_2_2320", message: "Interface '{0}' cannot simultaneously extend types '{1}' and '{2}'." },
+        Excessive_stack_depth_comparing_types_0_and_1: { code: 2321, category: ts.DiagnosticCategory.Error, key: "Excessive_stack_depth_comparing_types_0_and_1_2321", message: "Excessive stack depth comparing types '{0}' and '{1}'." },
+        Type_0_is_not_assignable_to_type_1: { code: 2322, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_assignable_to_type_1_2322", message: "Type '{0}' is not assignable to type '{1}'." },
+        Cannot_redeclare_exported_variable_0: { code: 2323, category: ts.DiagnosticCategory.Error, key: "Cannot_redeclare_exported_variable_0_2323", message: "Cannot redeclare exported variable '{0}'." },
+        Property_0_is_missing_in_type_1: { code: 2324, category: ts.DiagnosticCategory.Error, key: "Property_0_is_missing_in_type_1_2324", message: "Property '{0}' is missing in type '{1}'." },
+        Property_0_is_private_in_type_1_but_not_in_type_2: { code: 2325, category: ts.DiagnosticCategory.Error, key: "Property_0_is_private_in_type_1_but_not_in_type_2_2325", message: "Property '{0}' is private in type '{1}' but not in type '{2}'." },
+        Types_of_property_0_are_incompatible: { code: 2326, category: ts.DiagnosticCategory.Error, key: "Types_of_property_0_are_incompatible_2326", message: "Types of property '{0}' are incompatible." },
+        Property_0_is_optional_in_type_1_but_required_in_type_2: { code: 2327, category: ts.DiagnosticCategory.Error, key: "Property_0_is_optional_in_type_1_but_required_in_type_2_2327", message: "Property '{0}' is optional in type '{1}' but required in type '{2}'." },
+        Types_of_parameters_0_and_1_are_incompatible: { code: 2328, category: ts.DiagnosticCategory.Error, key: "Types_of_parameters_0_and_1_are_incompatible_2328", message: "Types of parameters '{0}' and '{1}' are incompatible." },
+        Index_signature_is_missing_in_type_0: { code: 2329, category: ts.DiagnosticCategory.Error, key: "Index_signature_is_missing_in_type_0_2329", message: "Index signature is missing in type '{0}'." },
+        Index_signatures_are_incompatible: { code: 2330, category: ts.DiagnosticCategory.Error, key: "Index_signatures_are_incompatible_2330", message: "Index signatures are incompatible." },
+        this_cannot_be_referenced_in_a_module_or_namespace_body: { code: 2331, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_a_module_or_namespace_body_2331", message: "'this' cannot be referenced in a module or namespace body." },
+        this_cannot_be_referenced_in_current_location: { code: 2332, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_current_location_2332", message: "'this' cannot be referenced in current location." },
+        this_cannot_be_referenced_in_constructor_arguments: { code: 2333, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_constructor_arguments_2333", message: "'this' cannot be referenced in constructor arguments." },
+        this_cannot_be_referenced_in_a_static_property_initializer: { code: 2334, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_a_static_property_initializer_2334", message: "'this' cannot be referenced in a static property initializer." },
+        super_can_only_be_referenced_in_a_derived_class: { code: 2335, category: ts.DiagnosticCategory.Error, key: "super_can_only_be_referenced_in_a_derived_class_2335", message: "'super' can only be referenced in a derived class." },
+        super_cannot_be_referenced_in_constructor_arguments: { code: 2336, category: ts.DiagnosticCategory.Error, key: "super_cannot_be_referenced_in_constructor_arguments_2336", message: "'super' cannot be referenced in constructor arguments." },
+        Super_calls_are_not_permitted_outside_constructors_or_in_nested_functions_inside_constructors: { code: 2337, category: ts.DiagnosticCategory.Error, key: "Super_calls_are_not_permitted_outside_constructors_or_in_nested_functions_inside_constructors_2337", message: "Super calls are not permitted outside constructors or in nested functions inside constructors." },
+        super_property_access_is_permitted_only_in_a_constructor_member_function_or_member_accessor_of_a_derived_class: { code: 2338, category: ts.DiagnosticCategory.Error, key: "super_property_access_is_permitted_only_in_a_constructor_member_function_or_member_accessor_of_a_der_2338", message: "'super' property access is permitted only in a constructor, member function, or member accessor of a derived class." },
+        Property_0_does_not_exist_on_type_1: { code: 2339, category: ts.DiagnosticCategory.Error, key: "Property_0_does_not_exist_on_type_1_2339", message: "Property '{0}' does not exist on type '{1}'." },
+        Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword: { code: 2340, category: ts.DiagnosticCategory.Error, key: "Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword_2340", message: "Only public and protected methods of the base class are accessible via the 'super' keyword." },
+        Property_0_is_private_and_only_accessible_within_class_1: { code: 2341, category: ts.DiagnosticCategory.Error, key: "Property_0_is_private_and_only_accessible_within_class_1_2341", message: "Property '{0}' is private and only accessible within class '{1}'." },
+        An_index_expression_argument_must_be_of_type_string_number_symbol_or_any: { code: 2342, category: ts.DiagnosticCategory.Error, key: "An_index_expression_argument_must_be_of_type_string_number_symbol_or_any_2342", message: "An index expression argument must be of type 'string', 'number', 'symbol', or 'any'." },
+        This_syntax_requires_an_imported_helper_named_1_but_module_0_has_no_exported_member_1: { code: 2343, category: ts.DiagnosticCategory.Error, key: "This_syntax_requires_an_imported_helper_named_1_but_module_0_has_no_exported_member_1_2343", message: "This syntax requires an imported helper named '{1}', but module '{0}' has no exported member '{1}'." },
+        Type_0_does_not_satisfy_the_constraint_1: { code: 2344, category: ts.DiagnosticCategory.Error, key: "Type_0_does_not_satisfy_the_constraint_1_2344", message: "Type '{0}' does not satisfy the constraint '{1}'." },
+        Argument_of_type_0_is_not_assignable_to_parameter_of_type_1: { code: 2345, category: ts.DiagnosticCategory.Error, key: "Argument_of_type_0_is_not_assignable_to_parameter_of_type_1_2345", message: "Argument of type '{0}' is not assignable to parameter of type '{1}'." },
+        Call_target_does_not_contain_any_signatures: { code: 2346, category: ts.DiagnosticCategory.Error, key: "Call_target_does_not_contain_any_signatures_2346", message: "Call target does not contain any signatures." },
+        Untyped_function_calls_may_not_accept_type_arguments: { code: 2347, category: ts.DiagnosticCategory.Error, key: "Untyped_function_calls_may_not_accept_type_arguments_2347", message: "Untyped function calls may not accept type arguments." },
+        Value_of_type_0_is_not_callable_Did_you_mean_to_include_new: { code: 2348, category: ts.DiagnosticCategory.Error, key: "Value_of_type_0_is_not_callable_Did_you_mean_to_include_new_2348", message: "Value of type '{0}' is not callable. Did you mean to include 'new'?" },
+        Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures: { code: 2349, category: ts.DiagnosticCategory.Error, key: "Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatur_2349", message: "Cannot invoke an expression whose type lacks a call signature. Type '{0}' has no compatible call signatures." },
+        Only_a_void_function_can_be_called_with_the_new_keyword: { code: 2350, category: ts.DiagnosticCategory.Error, key: "Only_a_void_function_can_be_called_with_the_new_keyword_2350", message: "Only a void function can be called with the 'new' keyword." },
+        Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature: { code: 2351, category: ts.DiagnosticCategory.Error, key: "Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature_2351", message: "Cannot use 'new' with an expression whose type lacks a call or construct signature." },
+        Type_0_cannot_be_converted_to_type_1: { code: 2352, category: ts.DiagnosticCategory.Error, key: "Type_0_cannot_be_converted_to_type_1_2352", message: "Type '{0}' cannot be converted to type '{1}'." },
+        Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1: { code: 2353, category: ts.DiagnosticCategory.Error, key: "Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1_2353", message: "Object literal may only specify known properties, and '{0}' does not exist in type '{1}'." },
+        This_syntax_requires_an_imported_helper_but_module_0_cannot_be_found: { code: 2354, category: ts.DiagnosticCategory.Error, key: "This_syntax_requires_an_imported_helper_but_module_0_cannot_be_found_2354", message: "This syntax requires an imported helper but module '{0}' cannot be found." },
+        A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value: { code: 2355, category: ts.DiagnosticCategory.Error, key: "A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value_2355", message: "A function whose declared type is neither 'void' nor 'any' must return a value." },
+        An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type: { code: 2356, category: ts.DiagnosticCategory.Error, key: "An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type_2356", message: "An arithmetic operand must be of type 'any', 'number' or an enum type." },
+        The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_or_a_property_access: { code: 2357, category: ts.DiagnosticCategory.Error, key: "The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_or_a_property_access_2357", message: "The operand of an increment or decrement operator must be a variable or a property access." },
+        The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_parameter: { code: 2358, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_paramete_2358", message: "The left-hand side of an 'instanceof' expression must be of type 'any', an object type or a type parameter." },
+        The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_Function_interface_type: { code: 2359, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_F_2359", message: "The right-hand side of an 'instanceof' expression must be of type 'any' or of a type assignable to the 'Function' interface type." },
+        The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol: { code: 2360, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol_2360", message: "The left-hand side of an 'in' expression must be of type 'any', 'string', 'number', or 'symbol'." },
+        The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter: { code: 2361, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter_2361", message: "The right-hand side of an 'in' expression must be of type 'any', an object type or a type parameter." },
+        The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type: { code: 2362, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type_2362", message: "The left-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type." },
+        The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type: { code: 2363, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type_2363", message: "The right-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type." },
+        The_left_hand_side_of_an_assignment_expression_must_be_a_variable_or_a_property_access: { code: 2364, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_an_assignment_expression_must_be_a_variable_or_a_property_access_2364", message: "The left-hand side of an assignment expression must be a variable or a property access." },
+        Operator_0_cannot_be_applied_to_types_1_and_2: { code: 2365, category: ts.DiagnosticCategory.Error, key: "Operator_0_cannot_be_applied_to_types_1_and_2_2365", message: "Operator '{0}' cannot be applied to types '{1}' and '{2}'." },
+        Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined: { code: 2366, category: ts.DiagnosticCategory.Error, key: "Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined_2366", message: "Function lacks ending return statement and return type does not include 'undefined'." },
+        Type_parameter_name_cannot_be_0: { code: 2368, category: ts.DiagnosticCategory.Error, key: "Type_parameter_name_cannot_be_0_2368", message: "Type parameter name cannot be '{0}'." },
+        A_parameter_property_is_only_allowed_in_a_constructor_implementation: { code: 2369, category: ts.DiagnosticCategory.Error, key: "A_parameter_property_is_only_allowed_in_a_constructor_implementation_2369", message: "A parameter property is only allowed in a constructor implementation." },
+        A_rest_parameter_must_be_of_an_array_type: { code: 2370, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_must_be_of_an_array_type_2370", message: "A rest parameter must be of an array type." },
+        A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation: { code: 2371, category: ts.DiagnosticCategory.Error, key: "A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation_2371", message: "A parameter initializer is only allowed in a function or constructor implementation." },
+        Parameter_0_cannot_be_referenced_in_its_initializer: { code: 2372, category: ts.DiagnosticCategory.Error, key: "Parameter_0_cannot_be_referenced_in_its_initializer_2372", message: "Parameter '{0}' cannot be referenced in its initializer." },
+        Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it: { code: 2373, category: ts.DiagnosticCategory.Error, key: "Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it_2373", message: "Initializer of parameter '{0}' cannot reference identifier '{1}' declared after it." },
+        Duplicate_string_index_signature: { code: 2374, category: ts.DiagnosticCategory.Error, key: "Duplicate_string_index_signature_2374", message: "Duplicate string index signature." },
+        Duplicate_number_index_signature: { code: 2375, category: ts.DiagnosticCategory.Error, key: "Duplicate_number_index_signature_2375", message: "Duplicate number index signature." },
+        A_super_call_must_be_the_first_statement_in_the_constructor_when_a_class_contains_initialized_properties_or_has_parameter_properties: { code: 2376, category: ts.DiagnosticCategory.Error, key: "A_super_call_must_be_the_first_statement_in_the_constructor_when_a_class_contains_initialized_proper_2376", message: "A 'super' call must be the first statement in the constructor when a class contains initialized properties or has parameter properties." },
+        Constructors_for_derived_classes_must_contain_a_super_call: { code: 2377, category: ts.DiagnosticCategory.Error, key: "Constructors_for_derived_classes_must_contain_a_super_call_2377", message: "Constructors for derived classes must contain a 'super' call." },
+        A_get_accessor_must_return_a_value: { code: 2378, category: ts.DiagnosticCategory.Error, key: "A_get_accessor_must_return_a_value_2378", message: "A 'get' accessor must return a value." },
+        Getter_and_setter_accessors_do_not_agree_in_visibility: { code: 2379, category: ts.DiagnosticCategory.Error, key: "Getter_and_setter_accessors_do_not_agree_in_visibility_2379", message: "Getter and setter accessors do not agree in visibility." },
+        get_and_set_accessor_must_have_the_same_type: { code: 2380, category: ts.DiagnosticCategory.Error, key: "get_and_set_accessor_must_have_the_same_type_2380", message: "'get' and 'set' accessor must have the same type." },
+        A_signature_with_an_implementation_cannot_use_a_string_literal_type: { code: 2381, category: ts.DiagnosticCategory.Error, key: "A_signature_with_an_implementation_cannot_use_a_string_literal_type_2381", message: "A signature with an implementation cannot use a string literal type." },
+        Specialized_overload_signature_is_not_assignable_to_any_non_specialized_signature: { code: 2382, category: ts.DiagnosticCategory.Error, key: "Specialized_overload_signature_is_not_assignable_to_any_non_specialized_signature_2382", message: "Specialized overload signature is not assignable to any non-specialized signature." },
+        Overload_signatures_must_all_be_exported_or_non_exported: { code: 2383, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_exported_or_non_exported_2383", message: "Overload signatures must all be exported or non-exported." },
+        Overload_signatures_must_all_be_ambient_or_non_ambient: { code: 2384, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_ambient_or_non_ambient_2384", message: "Overload signatures must all be ambient or non-ambient." },
+        Overload_signatures_must_all_be_public_private_or_protected: { code: 2385, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_public_private_or_protected_2385", message: "Overload signatures must all be public, private or protected." },
+        Overload_signatures_must_all_be_optional_or_required: { code: 2386, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_optional_or_required_2386", message: "Overload signatures must all be optional or required." },
+        Function_overload_must_be_static: { code: 2387, category: ts.DiagnosticCategory.Error, key: "Function_overload_must_be_static_2387", message: "Function overload must be static." },
+        Function_overload_must_not_be_static: { code: 2388, category: ts.DiagnosticCategory.Error, key: "Function_overload_must_not_be_static_2388", message: "Function overload must not be static." },
+        Function_implementation_name_must_be_0: { code: 2389, category: ts.DiagnosticCategory.Error, key: "Function_implementation_name_must_be_0_2389", message: "Function implementation name must be '{0}'." },
+        Constructor_implementation_is_missing: { code: 2390, category: ts.DiagnosticCategory.Error, key: "Constructor_implementation_is_missing_2390", message: "Constructor implementation is missing." },
+        Function_implementation_is_missing_or_not_immediately_following_the_declaration: { code: 2391, category: ts.DiagnosticCategory.Error, key: "Function_implementation_is_missing_or_not_immediately_following_the_declaration_2391", message: "Function implementation is missing or not immediately following the declaration." },
+        Multiple_constructor_implementations_are_not_allowed: { code: 2392, category: ts.DiagnosticCategory.Error, key: "Multiple_constructor_implementations_are_not_allowed_2392", message: "Multiple constructor implementations are not allowed." },
+        Duplicate_function_implementation: { code: 2393, category: ts.DiagnosticCategory.Error, key: "Duplicate_function_implementation_2393", message: "Duplicate function implementation." },
+        Overload_signature_is_not_compatible_with_function_implementation: { code: 2394, category: ts.DiagnosticCategory.Error, key: "Overload_signature_is_not_compatible_with_function_implementation_2394", message: "Overload signature is not compatible with function implementation." },
+        Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local: { code: 2395, category: ts.DiagnosticCategory.Error, key: "Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local_2395", message: "Individual declarations in merged declaration '{0}' must be all exported or all local." },
+        Duplicate_identifier_arguments_Compiler_uses_arguments_to_initialize_rest_parameters: { code: 2396, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_arguments_Compiler_uses_arguments_to_initialize_rest_parameters_2396", message: "Duplicate identifier 'arguments'. Compiler uses 'arguments' to initialize rest parameters." },
+        Declaration_name_conflicts_with_built_in_global_identifier_0: { code: 2397, category: ts.DiagnosticCategory.Error, key: "Declaration_name_conflicts_with_built_in_global_identifier_0_2397", message: "Declaration name conflicts with built-in global identifier '{0}'." },
+        Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference: { code: 2399, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference_2399", message: "Duplicate identifier '_this'. Compiler uses variable declaration '_this' to capture 'this' reference." },
+        Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference: { code: 2400, category: ts.DiagnosticCategory.Error, key: "Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference_2400", message: "Expression resolves to variable declaration '_this' that compiler uses to capture 'this' reference." },
+        Duplicate_identifier_super_Compiler_uses_super_to_capture_base_class_reference: { code: 2401, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_super_Compiler_uses_super_to_capture_base_class_reference_2401", message: "Duplicate identifier '_super'. Compiler uses '_super' to capture base class reference." },
+        Expression_resolves_to_super_that_compiler_uses_to_capture_base_class_reference: { code: 2402, category: ts.DiagnosticCategory.Error, key: "Expression_resolves_to_super_that_compiler_uses_to_capture_base_class_reference_2402", message: "Expression resolves to '_super' that compiler uses to capture base class reference." },
+        Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_type_2: { code: 2403, category: ts.DiagnosticCategory.Error, key: "Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_t_2403", message: "Subsequent variable declarations must have the same type.  Variable '{0}' must be of type '{1}', but here has type '{2}'." },
+        The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation: { code: 2404, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation_2404", message: "The left-hand side of a 'for...in' statement cannot use a type annotation." },
+        The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any: { code: 2405, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any_2405", message: "The left-hand side of a 'for...in' statement must be of type 'string' or 'any'." },
+        The_left_hand_side_of_a_for_in_statement_must_be_a_variable_or_a_property_access: { code: 2406, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_must_be_a_variable_or_a_property_access_2406", message: "The left-hand side of a 'for...in' statement must be a variable or a property access." },
+        The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter: { code: 2407, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter_2407", message: "The right-hand side of a 'for...in' statement must be of type 'any', an object type or a type parameter." },
+        Setters_cannot_return_a_value: { code: 2408, category: ts.DiagnosticCategory.Error, key: "Setters_cannot_return_a_value_2408", message: "Setters cannot return a value." },
+        Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class: { code: 2409, category: ts.DiagnosticCategory.Error, key: "Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class_2409", message: "Return type of constructor signature must be assignable to the instance type of the class." },
+        The_with_statement_is_not_supported_All_symbols_in_a_with_block_will_have_type_any: { code: 2410, category: ts.DiagnosticCategory.Error, key: "The_with_statement_is_not_supported_All_symbols_in_a_with_block_will_have_type_any_2410", message: "The 'with' statement is not supported. All symbols in a 'with' block will have type 'any'." },
+        Property_0_of_type_1_is_not_assignable_to_string_index_type_2: { code: 2411, category: ts.DiagnosticCategory.Error, key: "Property_0_of_type_1_is_not_assignable_to_string_index_type_2_2411", message: "Property '{0}' of type '{1}' is not assignable to string index type '{2}'." },
+        Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2: { code: 2412, category: ts.DiagnosticCategory.Error, key: "Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2_2412", message: "Property '{0}' of type '{1}' is not assignable to numeric index type '{2}'." },
+        Numeric_index_type_0_is_not_assignable_to_string_index_type_1: { code: 2413, category: ts.DiagnosticCategory.Error, key: "Numeric_index_type_0_is_not_assignable_to_string_index_type_1_2413", message: "Numeric index type '{0}' is not assignable to string index type '{1}'." },
+        Class_name_cannot_be_0: { code: 2414, category: ts.DiagnosticCategory.Error, key: "Class_name_cannot_be_0_2414", message: "Class name cannot be '{0}'." },
+        Class_0_incorrectly_extends_base_class_1: { code: 2415, category: ts.DiagnosticCategory.Error, key: "Class_0_incorrectly_extends_base_class_1_2415", message: "Class '{0}' incorrectly extends base class '{1}'." },
+        Class_static_side_0_incorrectly_extends_base_class_static_side_1: { code: 2417, category: ts.DiagnosticCategory.Error, key: "Class_static_side_0_incorrectly_extends_base_class_static_side_1_2417", message: "Class static side '{0}' incorrectly extends base class static side '{1}'." },
+        Class_0_incorrectly_implements_interface_1: { code: 2420, category: ts.DiagnosticCategory.Error, key: "Class_0_incorrectly_implements_interface_1_2420", message: "Class '{0}' incorrectly implements interface '{1}'." },
+        A_class_may_only_implement_another_class_or_interface: { code: 2422, category: ts.DiagnosticCategory.Error, key: "A_class_may_only_implement_another_class_or_interface_2422", message: "A class may only implement another class or interface." },
+        Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_accessor: { code: 2423, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_access_2423", message: "Class '{0}' defines instance member function '{1}', but extended class '{2}' defines it as instance member accessor." },
+        Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_property: { code: 2424, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_proper_2424", message: "Class '{0}' defines instance member function '{1}', but extended class '{2}' defines it as instance member property." },
+        Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_function: { code: 2425, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_functi_2425", message: "Class '{0}' defines instance member property '{1}', but extended class '{2}' defines it as instance member function." },
+        Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_function: { code: 2426, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_functi_2426", message: "Class '{0}' defines instance member accessor '{1}', but extended class '{2}' defines it as instance member function." },
+        Interface_name_cannot_be_0: { code: 2427, category: ts.DiagnosticCategory.Error, key: "Interface_name_cannot_be_0_2427", message: "Interface name cannot be '{0}'." },
+        All_declarations_of_0_must_have_identical_type_parameters: { code: 2428, category: ts.DiagnosticCategory.Error, key: "All_declarations_of_0_must_have_identical_type_parameters_2428", message: "All declarations of '{0}' must have identical type parameters." },
+        Interface_0_incorrectly_extends_interface_1: { code: 2430, category: ts.DiagnosticCategory.Error, key: "Interface_0_incorrectly_extends_interface_1_2430", message: "Interface '{0}' incorrectly extends interface '{1}'." },
+        Enum_name_cannot_be_0: { code: 2431, category: ts.DiagnosticCategory.Error, key: "Enum_name_cannot_be_0_2431", message: "Enum name cannot be '{0}'." },
+        In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enum_element: { code: 2432, category: ts.DiagnosticCategory.Error, key: "In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enu_2432", message: "In an enum with multiple declarations, only one declaration can omit an initializer for its first enum element." },
+        A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merged: { code: 2433, category: ts.DiagnosticCategory.Error, key: "A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merg_2433", message: "A namespace declaration cannot be in a different file from a class or function with which it is merged." },
+        A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged: { code: 2434, category: ts.DiagnosticCategory.Error, key: "A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged_2434", message: "A namespace declaration cannot be located prior to a class or function with which it is merged." },
+        Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces: { code: 2435, category: ts.DiagnosticCategory.Error, key: "Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces_2435", message: "Ambient modules cannot be nested in other modules or namespaces." },
+        Ambient_module_declaration_cannot_specify_relative_module_name: { code: 2436, category: ts.DiagnosticCategory.Error, key: "Ambient_module_declaration_cannot_specify_relative_module_name_2436", message: "Ambient module declaration cannot specify relative module name." },
+        Module_0_is_hidden_by_a_local_declaration_with_the_same_name: { code: 2437, category: ts.DiagnosticCategory.Error, key: "Module_0_is_hidden_by_a_local_declaration_with_the_same_name_2437", message: "Module '{0}' is hidden by a local declaration with the same name." },
+        Import_name_cannot_be_0: { code: 2438, category: ts.DiagnosticCategory.Error, key: "Import_name_cannot_be_0_2438", message: "Import name cannot be '{0}'." },
+        Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relative_module_name: { code: 2439, category: ts.DiagnosticCategory.Error, key: "Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relati_2439", message: "Import or export declaration in an ambient module declaration cannot reference module through relative module name." },
+        Import_declaration_conflicts_with_local_declaration_of_0: { code: 2440, category: ts.DiagnosticCategory.Error, key: "Import_declaration_conflicts_with_local_declaration_of_0_2440", message: "Import declaration conflicts with local declaration of '{0}'." },
+        Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module: { code: 2441, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_2441", message: "Duplicate identifier '{0}'. Compiler reserves name '{1}' in top level scope of a module." },
+        Types_have_separate_declarations_of_a_private_property_0: { code: 2442, category: ts.DiagnosticCategory.Error, key: "Types_have_separate_declarations_of_a_private_property_0_2442", message: "Types have separate declarations of a private property '{0}'." },
+        Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2: { code: 2443, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2_2443", message: "Property '{0}' is protected but type '{1}' is not a class derived from '{2}'." },
+        Property_0_is_protected_in_type_1_but_public_in_type_2: { code: 2444, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_in_type_1_but_public_in_type_2_2444", message: "Property '{0}' is protected in type '{1}' but public in type '{2}'." },
+        Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses: { code: 2445, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses_2445", message: "Property '{0}' is protected and only accessible within class '{1}' and its subclasses." },
+        Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1: { code: 2446, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1_2446", message: "Property '{0}' is protected and only accessible through an instance of class '{1}'." },
+        The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead: { code: 2447, category: ts.DiagnosticCategory.Error, key: "The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead_2447", message: "The '{0}' operator is not allowed for boolean types. Consider using '{1}' instead." },
+        Block_scoped_variable_0_used_before_its_declaration: { code: 2448, category: ts.DiagnosticCategory.Error, key: "Block_scoped_variable_0_used_before_its_declaration_2448", message: "Block-scoped variable '{0}' used before its declaration." },
+        Class_0_used_before_its_declaration: { code: 2449, category: ts.DiagnosticCategory.Error, key: "Class_0_used_before_its_declaration_2449", message: "Class '{0}' used before its declaration." },
+        Enum_0_used_before_its_declaration: { code: 2450, category: ts.DiagnosticCategory.Error, key: "Enum_0_used_before_its_declaration_2450", message: "Enum '{0}' used before its declaration." },
+        Cannot_redeclare_block_scoped_variable_0: { code: 2451, category: ts.DiagnosticCategory.Error, key: "Cannot_redeclare_block_scoped_variable_0_2451", message: "Cannot redeclare block-scoped variable '{0}'." },
+        An_enum_member_cannot_have_a_numeric_name: { code: 2452, category: ts.DiagnosticCategory.Error, key: "An_enum_member_cannot_have_a_numeric_name_2452", message: "An enum member cannot have a numeric name." },
+        The_type_argument_for_type_parameter_0_cannot_be_inferred_from_the_usage_Consider_specifying_the_type_arguments_explicitly: { code: 2453, category: ts.DiagnosticCategory.Error, key: "The_type_argument_for_type_parameter_0_cannot_be_inferred_from_the_usage_Consider_specifying_the_typ_2453", message: "The type argument for type parameter '{0}' cannot be inferred from the usage. Consider specifying the type arguments explicitly." },
+        Variable_0_is_used_before_being_assigned: { code: 2454, category: ts.DiagnosticCategory.Error, key: "Variable_0_is_used_before_being_assigned_2454", message: "Variable '{0}' is used before being assigned." },
+        Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0: { code: 2455, category: ts.DiagnosticCategory.Error, key: "Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0_2455", message: "Type argument candidate '{1}' is not a valid type argument because it is not a supertype of candidate '{0}'." },
+        Type_alias_0_circularly_references_itself: { code: 2456, category: ts.DiagnosticCategory.Error, key: "Type_alias_0_circularly_references_itself_2456", message: "Type alias '{0}' circularly references itself." },
+        Type_alias_name_cannot_be_0: { code: 2457, category: ts.DiagnosticCategory.Error, key: "Type_alias_name_cannot_be_0_2457", message: "Type alias name cannot be '{0}'." },
+        An_AMD_module_cannot_have_multiple_name_assignments: { code: 2458, category: ts.DiagnosticCategory.Error, key: "An_AMD_module_cannot_have_multiple_name_assignments_2458", message: "An AMD module cannot have multiple name assignments." },
+        Type_0_has_no_property_1_and_no_string_index_signature: { code: 2459, category: ts.DiagnosticCategory.Error, key: "Type_0_has_no_property_1_and_no_string_index_signature_2459", message: "Type '{0}' has no property '{1}' and no string index signature." },
+        Type_0_has_no_property_1: { code: 2460, category: ts.DiagnosticCategory.Error, key: "Type_0_has_no_property_1_2460", message: "Type '{0}' has no property '{1}'." },
+        Type_0_is_not_an_array_type: { code: 2461, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_an_array_type_2461", message: "Type '{0}' is not an array type." },
+        A_rest_element_must_be_last_in_a_destructuring_pattern: { code: 2462, category: ts.DiagnosticCategory.Error, key: "A_rest_element_must_be_last_in_a_destructuring_pattern_2462", message: "A rest element must be last in a destructuring pattern." },
+        A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature: { code: 2463, category: ts.DiagnosticCategory.Error, key: "A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature_2463", message: "A binding pattern parameter cannot be optional in an implementation signature." },
+        A_computed_property_name_must_be_of_type_string_number_symbol_or_any: { code: 2464, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_must_be_of_type_string_number_symbol_or_any_2464", message: "A computed property name must be of type 'string', 'number', 'symbol', or 'any'." },
+        this_cannot_be_referenced_in_a_computed_property_name: { code: 2465, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_a_computed_property_name_2465", message: "'this' cannot be referenced in a computed property name." },
+        super_cannot_be_referenced_in_a_computed_property_name: { code: 2466, category: ts.DiagnosticCategory.Error, key: "super_cannot_be_referenced_in_a_computed_property_name_2466", message: "'super' cannot be referenced in a computed property name." },
+        A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type: { code: 2467, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type_2467", message: "A computed property name cannot reference a type parameter from its containing type." },
+        Cannot_find_global_value_0: { code: 2468, category: ts.DiagnosticCategory.Error, key: "Cannot_find_global_value_0_2468", message: "Cannot find global value '{0}'." },
+        The_0_operator_cannot_be_applied_to_type_symbol: { code: 2469, category: ts.DiagnosticCategory.Error, key: "The_0_operator_cannot_be_applied_to_type_symbol_2469", message: "The '{0}' operator cannot be applied to type 'symbol'." },
+        Symbol_reference_does_not_refer_to_the_global_Symbol_constructor_object: { code: 2470, category: ts.DiagnosticCategory.Error, key: "Symbol_reference_does_not_refer_to_the_global_Symbol_constructor_object_2470", message: "'Symbol' reference does not refer to the global Symbol constructor object." },
+        A_computed_property_name_of_the_form_0_must_be_of_type_symbol: { code: 2471, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_of_the_form_0_must_be_of_type_symbol_2471", message: "A computed property name of the form '{0}' must be of type 'symbol'." },
+        Spread_operator_in_new_expressions_is_only_available_when_targeting_ECMAScript_5_and_higher: { code: 2472, category: ts.DiagnosticCategory.Error, key: "Spread_operator_in_new_expressions_is_only_available_when_targeting_ECMAScript_5_and_higher_2472", message: "Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher." },
+        Enum_declarations_must_all_be_const_or_non_const: { code: 2473, category: ts.DiagnosticCategory.Error, key: "Enum_declarations_must_all_be_const_or_non_const_2473", message: "Enum declarations must all be const or non-const." },
+        In_const_enum_declarations_member_initializer_must_be_constant_expression: { code: 2474, category: ts.DiagnosticCategory.Error, key: "In_const_enum_declarations_member_initializer_must_be_constant_expression_2474", message: "In 'const' enum declarations member initializer must be constant expression." },
+        const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_import_declaration_or_export_assignment: { code: 2475, category: ts.DiagnosticCategory.Error, key: "const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_im_2475", message: "'const' enums can only be used in property or index access expressions or the right hand side of an import declaration or export assignment." },
+        A_const_enum_member_can_only_be_accessed_using_a_string_literal: { code: 2476, category: ts.DiagnosticCategory.Error, key: "A_const_enum_member_can_only_be_accessed_using_a_string_literal_2476", message: "A const enum member can only be accessed using a string literal." },
+        const_enum_member_initializer_was_evaluated_to_a_non_finite_value: { code: 2477, category: ts.DiagnosticCategory.Error, key: "const_enum_member_initializer_was_evaluated_to_a_non_finite_value_2477", message: "'const' enum member initializer was evaluated to a non-finite value." },
+        const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN: { code: 2478, category: ts.DiagnosticCategory.Error, key: "const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN_2478", message: "'const' enum member initializer was evaluated to disallowed value 'NaN'." },
+        Property_0_does_not_exist_on_const_enum_1: { code: 2479, category: ts.DiagnosticCategory.Error, key: "Property_0_does_not_exist_on_const_enum_1_2479", message: "Property '{0}' does not exist on 'const' enum '{1}'." },
+        let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations: { code: 2480, category: ts.DiagnosticCategory.Error, key: "let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations_2480", message: "'let' is not allowed to be used as a name in 'let' or 'const' declarations." },
+        Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1: { code: 2481, category: ts.DiagnosticCategory.Error, key: "Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1_2481", message: "Cannot initialize outer scoped variable '{0}' in the same scope as block scoped declaration '{1}'." },
+        The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation: { code: 2483, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation_2483", message: "The left-hand side of a 'for...of' statement cannot use a type annotation." },
+        Export_declaration_conflicts_with_exported_declaration_of_0: { code: 2484, category: ts.DiagnosticCategory.Error, key: "Export_declaration_conflicts_with_exported_declaration_of_0_2484", message: "Export declaration conflicts with exported declaration of '{0}'." },
+        The_left_hand_side_of_a_for_of_statement_must_be_a_variable_or_a_property_access: { code: 2487, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_of_statement_must_be_a_variable_or_a_property_access_2487", message: "The left-hand side of a 'for...of' statement must be a variable or a property access." },
+        Type_must_have_a_Symbol_iterator_method_that_returns_an_iterator: { code: 2488, category: ts.DiagnosticCategory.Error, key: "Type_must_have_a_Symbol_iterator_method_that_returns_an_iterator_2488", message: "Type must have a '[Symbol.iterator]()' method that returns an iterator." },
+        An_iterator_must_have_a_next_method: { code: 2489, category: ts.DiagnosticCategory.Error, key: "An_iterator_must_have_a_next_method_2489", message: "An iterator must have a 'next()' method." },
+        The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property: { code: 2490, category: ts.DiagnosticCategory.Error, key: "The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property_2490", message: "The type returned by the 'next()' method of an iterator must have a 'value' property." },
+        The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern: { code: 2491, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern_2491", message: "The left-hand side of a 'for...in' statement cannot be a destructuring pattern." },
+        Cannot_redeclare_identifier_0_in_catch_clause: { code: 2492, category: ts.DiagnosticCategory.Error, key: "Cannot_redeclare_identifier_0_in_catch_clause_2492", message: "Cannot redeclare identifier '{0}' in catch clause." },
+        Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2: { code: 2493, category: ts.DiagnosticCategory.Error, key: "Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2_2493", message: "Tuple type '{0}' with length '{1}' cannot be assigned to tuple with length '{2}'." },
+        Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher: { code: 2494, category: ts.DiagnosticCategory.Error, key: "Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher_2494", message: "Using a string in a 'for...of' statement is only supported in ECMAScript 5 and higher." },
+        Type_0_is_not_an_array_type_or_a_string_type: { code: 2495, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_an_array_type_or_a_string_type_2495", message: "Type '{0}' is not an array type or a string type." },
+        The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_standard_function_expression: { code: 2496, category: ts.DiagnosticCategory.Error, key: "The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_stand_2496", message: "The 'arguments' object cannot be referenced in an arrow function in ES3 and ES5. Consider using a standard function expression." },
+        Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct: { code: 2497, category: ts.DiagnosticCategory.Error, key: "Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct_2497", message: "Module '{0}' resolves to a non-module entity and cannot be imported using this construct." },
+        Module_0_uses_export_and_cannot_be_used_with_export_Asterisk: { code: 2498, category: ts.DiagnosticCategory.Error, key: "Module_0_uses_export_and_cannot_be_used_with_export_Asterisk_2498", message: "Module '{0}' uses 'export =' and cannot be used with 'export *'." },
+        An_interface_can_only_extend_an_identifier_Slashqualified_name_with_optional_type_arguments: { code: 2499, category: ts.DiagnosticCategory.Error, key: "An_interface_can_only_extend_an_identifier_Slashqualified_name_with_optional_type_arguments_2499", message: "An interface can only extend an identifier/qualified-name with optional type arguments." },
+        A_class_can_only_implement_an_identifier_Slashqualified_name_with_optional_type_arguments: { code: 2500, category: ts.DiagnosticCategory.Error, key: "A_class_can_only_implement_an_identifier_Slashqualified_name_with_optional_type_arguments_2500", message: "A class can only implement an identifier/qualified-name with optional type arguments." },
+        A_rest_element_cannot_contain_a_binding_pattern: { code: 2501, category: ts.DiagnosticCategory.Error, key: "A_rest_element_cannot_contain_a_binding_pattern_2501", message: "A rest element cannot contain a binding pattern." },
+        _0_is_referenced_directly_or_indirectly_in_its_own_type_annotation: { code: 2502, category: ts.DiagnosticCategory.Error, key: "_0_is_referenced_directly_or_indirectly_in_its_own_type_annotation_2502", message: "'{0}' is referenced directly or indirectly in its own type annotation." },
+        Cannot_find_namespace_0: { code: 2503, category: ts.DiagnosticCategory.Error, key: "Cannot_find_namespace_0_2503", message: "Cannot find namespace '{0}'." },
+        Type_must_have_a_Symbol_asyncIterator_method_that_returns_an_async_iterator: { code: 2504, category: ts.DiagnosticCategory.Error, key: "Type_must_have_a_Symbol_asyncIterator_method_that_returns_an_async_iterator_2504", message: "Type must have a '[Symbol.asyncIterator]()' method that returns an async iterator." },
+        A_generator_cannot_have_a_void_type_annotation: { code: 2505, category: ts.DiagnosticCategory.Error, key: "A_generator_cannot_have_a_void_type_annotation_2505", message: "A generator cannot have a 'void' type annotation." },
+        _0_is_referenced_directly_or_indirectly_in_its_own_base_expression: { code: 2506, category: ts.DiagnosticCategory.Error, key: "_0_is_referenced_directly_or_indirectly_in_its_own_base_expression_2506", message: "'{0}' is referenced directly or indirectly in its own base expression." },
+        Type_0_is_not_a_constructor_function_type: { code: 2507, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_a_constructor_function_type_2507", message: "Type '{0}' is not a constructor function type." },
+        No_base_constructor_has_the_specified_number_of_type_arguments: { code: 2508, category: ts.DiagnosticCategory.Error, key: "No_base_constructor_has_the_specified_number_of_type_arguments_2508", message: "No base constructor has the specified number of type arguments." },
+        Base_constructor_return_type_0_is_not_a_class_or_interface_type: { code: 2509, category: ts.DiagnosticCategory.Error, key: "Base_constructor_return_type_0_is_not_a_class_or_interface_type_2509", message: "Base constructor return type '{0}' is not a class or interface type." },
+        Base_constructors_must_all_have_the_same_return_type: { code: 2510, category: ts.DiagnosticCategory.Error, key: "Base_constructors_must_all_have_the_same_return_type_2510", message: "Base constructors must all have the same return type." },
+        Cannot_create_an_instance_of_the_abstract_class_0: { code: 2511, category: ts.DiagnosticCategory.Error, key: "Cannot_create_an_instance_of_the_abstract_class_0_2511", message: "Cannot create an instance of the abstract class '{0}'." },
+        Overload_signatures_must_all_be_abstract_or_non_abstract: { code: 2512, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_abstract_or_non_abstract_2512", message: "Overload signatures must all be abstract or non-abstract." },
+        Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression: { code: 2513, category: ts.DiagnosticCategory.Error, key: "Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression_2513", message: "Abstract method '{0}' in class '{1}' cannot be accessed via super expression." },
+        Classes_containing_abstract_methods_must_be_marked_abstract: { code: 2514, category: ts.DiagnosticCategory.Error, key: "Classes_containing_abstract_methods_must_be_marked_abstract_2514", message: "Classes containing abstract methods must be marked abstract." },
+        Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2: { code: 2515, category: ts.DiagnosticCategory.Error, key: "Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2_2515", message: "Non-abstract class '{0}' does not implement inherited abstract member '{1}' from class '{2}'." },
+        All_declarations_of_an_abstract_method_must_be_consecutive: { code: 2516, category: ts.DiagnosticCategory.Error, key: "All_declarations_of_an_abstract_method_must_be_consecutive_2516", message: "All declarations of an abstract method must be consecutive." },
+        Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type: { code: 2517, category: ts.DiagnosticCategory.Error, key: "Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type_2517", message: "Cannot assign an abstract constructor type to a non-abstract constructor type." },
+        A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard: { code: 2518, category: ts.DiagnosticCategory.Error, key: "A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard_2518", message: "A 'this'-based type guard is not compatible with a parameter-based type guard." },
+        An_async_iterator_must_have_a_next_method: { code: 2519, category: ts.DiagnosticCategory.Error, key: "An_async_iterator_must_have_a_next_method_2519", message: "An async iterator must have a 'next()' method." },
+        Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions: { code: 2520, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions_2520", message: "Duplicate identifier '{0}'. Compiler uses declaration '{1}' to support async functions." },
+        Expression_resolves_to_variable_declaration_0_that_compiler_uses_to_support_async_functions: { code: 2521, category: ts.DiagnosticCategory.Error, key: "Expression_resolves_to_variable_declaration_0_that_compiler_uses_to_support_async_functions_2521", message: "Expression resolves to variable declaration '{0}' that compiler uses to support async functions." },
+        The_arguments_object_cannot_be_referenced_in_an_async_function_or_method_in_ES3_and_ES5_Consider_using_a_standard_function_or_method: { code: 2522, category: ts.DiagnosticCategory.Error, key: "The_arguments_object_cannot_be_referenced_in_an_async_function_or_method_in_ES3_and_ES5_Consider_usi_2522", message: "The 'arguments' object cannot be referenced in an async function or method in ES3 and ES5. Consider using a standard function or method." },
+        yield_expressions_cannot_be_used_in_a_parameter_initializer: { code: 2523, category: ts.DiagnosticCategory.Error, key: "yield_expressions_cannot_be_used_in_a_parameter_initializer_2523", message: "'yield' expressions cannot be used in a parameter initializer." },
+        await_expressions_cannot_be_used_in_a_parameter_initializer: { code: 2524, category: ts.DiagnosticCategory.Error, key: "await_expressions_cannot_be_used_in_a_parameter_initializer_2524", message: "'await' expressions cannot be used in a parameter initializer." },
+        Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value: { code: 2525, category: ts.DiagnosticCategory.Error, key: "Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value_2525", message: "Initializer provides no value for this binding element and the binding element has no default value." },
+        A_this_type_is_available_only_in_a_non_static_member_of_a_class_or_interface: { code: 2526, category: ts.DiagnosticCategory.Error, key: "A_this_type_is_available_only_in_a_non_static_member_of_a_class_or_interface_2526", message: "A 'this' type is available only in a non-static member of a class or interface." },
+        The_inferred_type_of_0_references_an_inaccessible_this_type_A_type_annotation_is_necessary: { code: 2527, category: ts.DiagnosticCategory.Error, key: "The_inferred_type_of_0_references_an_inaccessible_this_type_A_type_annotation_is_necessary_2527", message: "The inferred type of '{0}' references an inaccessible 'this' type. A type annotation is necessary." },
+        A_module_cannot_have_multiple_default_exports: { code: 2528, category: ts.DiagnosticCategory.Error, key: "A_module_cannot_have_multiple_default_exports_2528", message: "A module cannot have multiple default exports." },
+        Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_containing_async_functions: { code: 2529, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_containing_async_func_2529", message: "Duplicate identifier '{0}'. Compiler reserves name '{1}' in top level scope of a module containing async functions." },
+        Property_0_is_incompatible_with_index_signature: { code: 2530, category: ts.DiagnosticCategory.Error, key: "Property_0_is_incompatible_with_index_signature_2530", message: "Property '{0}' is incompatible with index signature." },
+        Object_is_possibly_null: { code: 2531, category: ts.DiagnosticCategory.Error, key: "Object_is_possibly_null_2531", message: "Object is possibly 'null'." },
+        Object_is_possibly_undefined: { code: 2532, category: ts.DiagnosticCategory.Error, key: "Object_is_possibly_undefined_2532", message: "Object is possibly 'undefined'." },
+        Object_is_possibly_null_or_undefined: { code: 2533, category: ts.DiagnosticCategory.Error, key: "Object_is_possibly_null_or_undefined_2533", message: "Object is possibly 'null' or 'undefined'." },
+        A_function_returning_never_cannot_have_a_reachable_end_point: { code: 2534, category: ts.DiagnosticCategory.Error, key: "A_function_returning_never_cannot_have_a_reachable_end_point_2534", message: "A function returning 'never' cannot have a reachable end point." },
+        Enum_type_0_has_members_with_initializers_that_are_not_literals: { code: 2535, category: ts.DiagnosticCategory.Error, key: "Enum_type_0_has_members_with_initializers_that_are_not_literals_2535", message: "Enum type '{0}' has members with initializers that are not literals." },
+        Type_0_cannot_be_used_to_index_type_1: { code: 2536, category: ts.DiagnosticCategory.Error, key: "Type_0_cannot_be_used_to_index_type_1_2536", message: "Type '{0}' cannot be used to index type '{1}'." },
+        Type_0_has_no_matching_index_signature_for_type_1: { code: 2537, category: ts.DiagnosticCategory.Error, key: "Type_0_has_no_matching_index_signature_for_type_1_2537", message: "Type '{0}' has no matching index signature for type '{1}'." },
+        Type_0_cannot_be_used_as_an_index_type: { code: 2538, category: ts.DiagnosticCategory.Error, key: "Type_0_cannot_be_used_as_an_index_type_2538", message: "Type '{0}' cannot be used as an index type." },
+        Cannot_assign_to_0_because_it_is_not_a_variable: { code: 2539, category: ts.DiagnosticCategory.Error, key: "Cannot_assign_to_0_because_it_is_not_a_variable_2539", message: "Cannot assign to '{0}' because it is not a variable." },
+        Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property: { code: 2540, category: ts.DiagnosticCategory.Error, key: "Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property_2540", message: "Cannot assign to '{0}' because it is a constant or a read-only property." },
+        The_target_of_an_assignment_must_be_a_variable_or_a_property_access: { code: 2541, category: ts.DiagnosticCategory.Error, key: "The_target_of_an_assignment_must_be_a_variable_or_a_property_access_2541", message: "The target of an assignment must be a variable or a property access." },
+        Index_signature_in_type_0_only_permits_reading: { code: 2542, category: ts.DiagnosticCategory.Error, key: "Index_signature_in_type_0_only_permits_reading_2542", message: "Index signature in type '{0}' only permits reading." },
+        Duplicate_identifier_newTarget_Compiler_uses_variable_declaration_newTarget_to_capture_new_target_meta_property_reference: { code: 2543, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_newTarget_Compiler_uses_variable_declaration_newTarget_to_capture_new_target_me_2543", message: "Duplicate identifier '_newTarget'. Compiler uses variable declaration '_newTarget' to capture 'new.target' meta-property reference." },
+        Expression_resolves_to_variable_declaration_newTarget_that_compiler_uses_to_capture_new_target_meta_property_reference: { code: 2544, category: ts.DiagnosticCategory.Error, key: "Expression_resolves_to_variable_declaration_newTarget_that_compiler_uses_to_capture_new_target_meta__2544", message: "Expression resolves to variable declaration '_newTarget' that compiler uses to capture 'new.target' meta-property reference." },
+        A_mixin_class_must_have_a_constructor_with_a_single_rest_parameter_of_type_any: { code: 2545, category: ts.DiagnosticCategory.Error, key: "A_mixin_class_must_have_a_constructor_with_a_single_rest_parameter_of_type_any_2545", message: "A mixin class must have a constructor with a single rest parameter of type 'any[]'." },
+        Property_0_has_conflicting_declarations_and_is_inaccessible_in_type_1: { code: 2546, category: ts.DiagnosticCategory.Error, key: "Property_0_has_conflicting_declarations_and_is_inaccessible_in_type_1_2546", message: "Property '{0}' has conflicting declarations and is inaccessible in type '{1}'." },
+        The_type_returned_by_the_next_method_of_an_async_iterator_must_be_a_promise_for_a_type_with_a_value_property: { code: 2547, category: ts.DiagnosticCategory.Error, key: "The_type_returned_by_the_next_method_of_an_async_iterator_must_be_a_promise_for_a_type_with_a_value__2547", message: "The type returned by the 'next()' method of an async iterator must be a promise for a type with a 'value' property." },
+        Type_0_is_not_an_array_type_or_does_not_have_a_Symbol_iterator_method_that_returns_an_iterator: { code: 2548, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_an_array_type_or_does_not_have_a_Symbol_iterator_method_that_returns_an_iterator_2548", message: "Type '{0}' is not an array type or does not have a '[Symbol.iterator]()' method that returns an iterator." },
+        Type_0_is_not_an_array_type_or_a_string_type_or_does_not_have_a_Symbol_iterator_method_that_returns_an_iterator: { code: 2549, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_an_array_type_or_a_string_type_or_does_not_have_a_Symbol_iterator_method_that_returns__2549", message: "Type '{0}' is not an array type or a string type or does not have a '[Symbol.iterator]()' method that returns an iterator." },
+        Generic_type_instantiation_is_excessively_deep_and_possibly_infinite: { code: 2550, category: ts.DiagnosticCategory.Error, key: "Generic_type_instantiation_is_excessively_deep_and_possibly_infinite_2550", message: "Generic type instantiation is excessively deep and possibly infinite." },
+        Property_0_does_not_exist_on_type_1_Did_you_mean_2: { code: 2551, category: ts.DiagnosticCategory.Error, key: "Property_0_does_not_exist_on_type_1_Did_you_mean_2_2551", message: "Property '{0}' does not exist on type '{1}'. Did you mean '{2}'?" },
+        Cannot_find_name_0_Did_you_mean_1: { code: 2552, category: ts.DiagnosticCategory.Error, key: "Cannot_find_name_0_Did_you_mean_1_2552", message: "Cannot find name '{0}'. Did you mean '{1}'?" },
+        Computed_values_are_not_permitted_in_an_enum_with_string_valued_members: { code: 2553, category: ts.DiagnosticCategory.Error, key: "Computed_values_are_not_permitted_in_an_enum_with_string_valued_members_2553", message: "Computed values are not permitted in an enum with string valued members." },
+        Expected_0_arguments_but_got_1: { code: 2554, category: ts.DiagnosticCategory.Error, key: "Expected_0_arguments_but_got_1_2554", message: "Expected {0} arguments, but got {1}." },
+        Expected_at_least_0_arguments_but_got_1: { code: 2555, category: ts.DiagnosticCategory.Error, key: "Expected_at_least_0_arguments_but_got_1_2555", message: "Expected at least {0} arguments, but got {1}." },
+        Expected_0_arguments_but_got_a_minimum_of_1: { code: 2556, category: ts.DiagnosticCategory.Error, key: "Expected_0_arguments_but_got_a_minimum_of_1_2556", message: "Expected {0} arguments, but got a minimum of {1}." },
+        Expected_at_least_0_arguments_but_got_a_minimum_of_1: { code: 2557, category: ts.DiagnosticCategory.Error, key: "Expected_at_least_0_arguments_but_got_a_minimum_of_1_2557", message: "Expected at least {0} arguments, but got a minimum of {1}." },
+        Expected_0_type_arguments_but_got_1: { code: 2558, category: ts.DiagnosticCategory.Error, key: "Expected_0_type_arguments_but_got_1_2558", message: "Expected {0} type arguments, but got {1}." },
+        Type_0_has_no_properties_in_common_with_type_1: { code: 2559, category: ts.DiagnosticCategory.Error, key: "Type_0_has_no_properties_in_common_with_type_1_2559", message: "Type '{0}' has no properties in common with type '{1}'." },
+        JSX_element_attributes_type_0_may_not_be_a_union_type: { code: 2600, category: ts.DiagnosticCategory.Error, key: "JSX_element_attributes_type_0_may_not_be_a_union_type_2600", message: "JSX element attributes type '{0}' may not be a union type." },
+        The_return_type_of_a_JSX_element_constructor_must_return_an_object_type: { code: 2601, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_a_JSX_element_constructor_must_return_an_object_type_2601", message: "The return type of a JSX element constructor must return an object type." },
+        JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist: { code: 2602, category: ts.DiagnosticCategory.Error, key: "JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist_2602", message: "JSX element implicitly has type 'any' because the global type 'JSX.Element' does not exist." },
+        Property_0_in_type_1_is_not_assignable_to_type_2: { code: 2603, category: ts.DiagnosticCategory.Error, key: "Property_0_in_type_1_is_not_assignable_to_type_2_2603", message: "Property '{0}' in type '{1}' is not assignable to type '{2}'." },
+        JSX_element_type_0_does_not_have_any_construct_or_call_signatures: { code: 2604, category: ts.DiagnosticCategory.Error, key: "JSX_element_type_0_does_not_have_any_construct_or_call_signatures_2604", message: "JSX element type '{0}' does not have any construct or call signatures." },
+        JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements: { code: 2605, category: ts.DiagnosticCategory.Error, key: "JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements_2605", message: "JSX element type '{0}' is not a constructor function for JSX elements." },
+        Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property: { code: 2606, category: ts.DiagnosticCategory.Error, key: "Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property_2606", message: "Property '{0}' of JSX spread attribute is not assignable to target property." },
+        JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property: { code: 2607, category: ts.DiagnosticCategory.Error, key: "JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property_2607", message: "JSX element class does not support attributes because it does not have a '{0}' property." },
+        The_global_type_JSX_0_may_not_have_more_than_one_property: { code: 2608, category: ts.DiagnosticCategory.Error, key: "The_global_type_JSX_0_may_not_have_more_than_one_property_2608", message: "The global type 'JSX.{0}' may not have more than one property." },
+        JSX_spread_child_must_be_an_array_type: { code: 2609, category: ts.DiagnosticCategory.Error, key: "JSX_spread_child_must_be_an_array_type_2609", message: "JSX spread child must be an array type." },
+        Cannot_augment_module_0_with_value_exports_because_it_resolves_to_a_non_module_entity: { code: 2649, category: ts.DiagnosticCategory.Error, key: "Cannot_augment_module_0_with_value_exports_because_it_resolves_to_a_non_module_entity_2649", message: "Cannot augment module '{0}' with value exports because it resolves to a non-module entity." },
+        A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums: { code: 2651, category: ts.DiagnosticCategory.Error, key: "A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_memb_2651", message: "A member initializer in a enum declaration cannot reference members declared after it, including members defined in other enums." },
+        Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead: { code: 2652, category: ts.DiagnosticCategory.Error, key: "Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_d_2652", message: "Merged declaration '{0}' cannot include a default export declaration. Consider adding a separate 'export default {0}' declaration instead." },
+        Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1: { code: 2653, category: ts.DiagnosticCategory.Error, key: "Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1_2653", message: "Non-abstract class expression does not implement inherited abstract member '{0}' from class '{1}'." },
+        Exported_external_package_typings_file_cannot_contain_tripleslash_references_Please_contact_the_package_author_to_update_the_package_definition: { code: 2654, category: ts.DiagnosticCategory.Error, key: "Exported_external_package_typings_file_cannot_contain_tripleslash_references_Please_contact_the_pack_2654", message: "Exported external package typings file cannot contain tripleslash references. Please contact the package author to update the package definition." },
+        Exported_external_package_typings_file_0_is_not_a_module_Please_contact_the_package_author_to_update_the_package_definition: { code: 2656, category: ts.DiagnosticCategory.Error, key: "Exported_external_package_typings_file_0_is_not_a_module_Please_contact_the_package_author_to_update_2656", message: "Exported external package typings file '{0}' is not a module. Please contact the package author to update the package definition." },
+        JSX_expressions_must_have_one_parent_element: { code: 2657, category: ts.DiagnosticCategory.Error, key: "JSX_expressions_must_have_one_parent_element_2657", message: "JSX expressions must have one parent element." },
+        Type_0_provides_no_match_for_the_signature_1: { code: 2658, category: ts.DiagnosticCategory.Error, key: "Type_0_provides_no_match_for_the_signature_1_2658", message: "Type '{0}' provides no match for the signature '{1}'." },
+        super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_higher: { code: 2659, category: ts.DiagnosticCategory.Error, key: "super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_highe_2659", message: "'super' is only allowed in members of object literal expressions when option 'target' is 'ES2015' or higher." },
+        super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions: { code: 2660, category: ts.DiagnosticCategory.Error, key: "super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions_2660", message: "'super' can only be referenced in members of derived classes or object literal expressions." },
+        Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module: { code: 2661, category: ts.DiagnosticCategory.Error, key: "Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module_2661", message: "Cannot export '{0}'. Only local declarations can be exported from a module." },
+        Cannot_find_name_0_Did_you_mean_the_static_member_1_0: { code: 2662, category: ts.DiagnosticCategory.Error, key: "Cannot_find_name_0_Did_you_mean_the_static_member_1_0_2662", message: "Cannot find name '{0}'. Did you mean the static member '{1}.{0}'?" },
+        Cannot_find_name_0_Did_you_mean_the_instance_member_this_0: { code: 2663, category: ts.DiagnosticCategory.Error, key: "Cannot_find_name_0_Did_you_mean_the_instance_member_this_0_2663", message: "Cannot find name '{0}'. Did you mean the instance member 'this.{0}'?" },
+        Invalid_module_name_in_augmentation_module_0_cannot_be_found: { code: 2664, category: ts.DiagnosticCategory.Error, key: "Invalid_module_name_in_augmentation_module_0_cannot_be_found_2664", message: "Invalid module name in augmentation, module '{0}' cannot be found." },
+        Invalid_module_name_in_augmentation_Module_0_resolves_to_an_untyped_module_at_1_which_cannot_be_augmented: { code: 2665, category: ts.DiagnosticCategory.Error, key: "Invalid_module_name_in_augmentation_Module_0_resolves_to_an_untyped_module_at_1_which_cannot_be_augm_2665", message: "Invalid module name in augmentation. Module '{0}' resolves to an untyped module at '{1}', which cannot be augmented." },
+        Exports_and_export_assignments_are_not_permitted_in_module_augmentations: { code: 2666, category: ts.DiagnosticCategory.Error, key: "Exports_and_export_assignments_are_not_permitted_in_module_augmentations_2666", message: "Exports and export assignments are not permitted in module augmentations." },
+        Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_module: { code: 2667, category: ts.DiagnosticCategory.Error, key: "Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_mod_2667", message: "Imports are not permitted in module augmentations. Consider moving them to the enclosing external module." },
+        export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always_visible: { code: 2668, category: ts.DiagnosticCategory.Error, key: "export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always__2668", message: "'export' modifier cannot be applied to ambient modules and module augmentations since they are always visible." },
+        Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations: { code: 2669, category: ts.DiagnosticCategory.Error, key: "Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_2669", message: "Augmentations for the global scope can only be directly nested in external modules or ambient module declarations." },
+        Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambient_context: { code: 2670, category: ts.DiagnosticCategory.Error, key: "Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambien_2670", message: "Augmentations for the global scope should have 'declare' modifier unless they appear in already ambient context." },
+        Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity: { code: 2671, category: ts.DiagnosticCategory.Error, key: "Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity_2671", message: "Cannot augment module '{0}' because it resolves to a non-module entity." },
+        Cannot_assign_a_0_constructor_type_to_a_1_constructor_type: { code: 2672, category: ts.DiagnosticCategory.Error, key: "Cannot_assign_a_0_constructor_type_to_a_1_constructor_type_2672", message: "Cannot assign a '{0}' constructor type to a '{1}' constructor type." },
+        Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration: { code: 2673, category: ts.DiagnosticCategory.Error, key: "Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration_2673", message: "Constructor of class '{0}' is private and only accessible within the class declaration." },
+        Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration: { code: 2674, category: ts.DiagnosticCategory.Error, key: "Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration_2674", message: "Constructor of class '{0}' is protected and only accessible within the class declaration." },
+        Cannot_extend_a_class_0_Class_constructor_is_marked_as_private: { code: 2675, category: ts.DiagnosticCategory.Error, key: "Cannot_extend_a_class_0_Class_constructor_is_marked_as_private_2675", message: "Cannot extend a class '{0}'. Class constructor is marked as private." },
+        Accessors_must_both_be_abstract_or_non_abstract: { code: 2676, category: ts.DiagnosticCategory.Error, key: "Accessors_must_both_be_abstract_or_non_abstract_2676", message: "Accessors must both be abstract or non-abstract." },
+        A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type: { code: 2677, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type_2677", message: "A type predicate's type must be assignable to its parameter's type." },
+        Type_0_is_not_comparable_to_type_1: { code: 2678, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_comparable_to_type_1_2678", message: "Type '{0}' is not comparable to type '{1}'." },
         A_function_that_is_called_with_the_new_keyword_cannot_have_a_this_type_that_is_void: { code: 2679, category: ts.DiagnosticCategory.Error, key: "A_function_that_is_called_with_the_new_keyword_cannot_have_a_this_type_that_is_void_2679", message: "A function that is called with the 'new' keyword cannot have a 'this' type that is 'void'." },
         A_this_parameter_must_be_the_first_parameter: { code: 2680, category: ts.DiagnosticCategory.Error, key: "A_this_parameter_must_be_the_first_parameter_2680", message: "A 'this' parameter must be the first parameter." },
         A_constructor_cannot_have_a_this_parameter: { code: 2681, category: ts.DiagnosticCategory.Error, key: "A_constructor_cannot_have_a_this_parameter_2681", message: "A constructor cannot have a 'this' parameter." },
@@ -8116,17 +9633,32 @@ var ts;
         this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation: { code: 2683, category: ts.DiagnosticCategory.Error, key: "this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_2683", message: "'this' implicitly has type 'any' because it does not have a type annotation." },
         The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1: { code: 2684, category: ts.DiagnosticCategory.Error, key: "The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1_2684", message: "The 'this' context of type '{0}' is not assignable to method's 'this' of type '{1}'." },
         The_this_types_of_each_signature_are_incompatible: { code: 2685, category: ts.DiagnosticCategory.Error, key: "The_this_types_of_each_signature_are_incompatible_2685", message: "The 'this' types of each signature are incompatible." },
-        Identifier_0_must_be_imported_from_a_module: { code: 2686, category: ts.DiagnosticCategory.Error, key: "Identifier_0_must_be_imported_from_a_module_2686", message: "Identifier '{0}' must be imported from a module" },
+        _0_refers_to_a_UMD_global_but_the_current_file_is_a_module_Consider_adding_an_import_instead: { code: 2686, category: ts.DiagnosticCategory.Error, key: "_0_refers_to_a_UMD_global_but_the_current_file_is_a_module_Consider_adding_an_import_instead_2686", message: "'{0}' refers to a UMD global, but the current file is a module. Consider adding an import instead." },
         All_declarations_of_0_must_have_identical_modifiers: { code: 2687, category: ts.DiagnosticCategory.Error, key: "All_declarations_of_0_must_have_identical_modifiers_2687", message: "All declarations of '{0}' must have identical modifiers." },
         Cannot_find_type_definition_file_for_0: { code: 2688, category: ts.DiagnosticCategory.Error, key: "Cannot_find_type_definition_file_for_0_2688", message: "Cannot find type definition file for '{0}'." },
         Cannot_extend_an_interface_0_Did_you_mean_implements: { code: 2689, category: ts.DiagnosticCategory.Error, key: "Cannot_extend_an_interface_0_Did_you_mean_implements_2689", message: "Cannot extend an interface '{0}'. Did you mean 'implements'?" },
-        A_class_must_be_declared_after_its_base_class: { code: 2690, category: ts.DiagnosticCategory.Error, key: "A_class_must_be_declared_after_its_base_class_2690", message: "A class must be declared after its base class." },
         An_import_path_cannot_end_with_a_0_extension_Consider_importing_1_instead: { code: 2691, category: ts.DiagnosticCategory.Error, key: "An_import_path_cannot_end_with_a_0_extension_Consider_importing_1_instead_2691", message: "An import path cannot end with a '{0}' extension. Consider importing '{1}' instead." },
         _0_is_a_primitive_but_1_is_a_wrapper_object_Prefer_using_0_when_possible: { code: 2692, category: ts.DiagnosticCategory.Error, key: "_0_is_a_primitive_but_1_is_a_wrapper_object_Prefer_using_0_when_possible_2692", message: "'{0}' is a primitive, but '{1}' is a wrapper object. Prefer using '{0}' when possible." },
         _0_only_refers_to_a_type_but_is_being_used_as_a_value_here: { code: 2693, category: ts.DiagnosticCategory.Error, key: "_0_only_refers_to_a_type_but_is_being_used_as_a_value_here_2693", message: "'{0}' only refers to a type, but is being used as a value here." },
         Namespace_0_has_no_exported_member_1: { code: 2694, category: ts.DiagnosticCategory.Error, key: "Namespace_0_has_no_exported_member_1_2694", message: "Namespace '{0}' has no exported member '{1}'." },
         Left_side_of_comma_operator_is_unused_and_has_no_side_effects: { code: 2695, category: ts.DiagnosticCategory.Error, key: "Left_side_of_comma_operator_is_unused_and_has_no_side_effects_2695", message: "Left side of comma operator is unused and has no side effects." },
         The_Object_type_is_assignable_to_very_few_other_types_Did_you_mean_to_use_the_any_type_instead: { code: 2696, category: ts.DiagnosticCategory.Error, key: "The_Object_type_is_assignable_to_very_few_other_types_Did_you_mean_to_use_the_any_type_instead_2696", message: "The 'Object' type is assignable to very few other types. Did you mean to use the 'any' type instead?" },
+        An_async_function_or_method_must_return_a_Promise_Make_sure_you_have_a_declaration_for_Promise_or_include_ES2015_in_your_lib_option: { code: 2697, category: ts.DiagnosticCategory.Error, key: "An_async_function_or_method_must_return_a_Promise_Make_sure_you_have_a_declaration_for_Promise_or_in_2697", message: "An async function or method must return a 'Promise'. Make sure you have a declaration for 'Promise' or include 'ES2015' in your `--lib` option." },
+        Spread_types_may_only_be_created_from_object_types: { code: 2698, category: ts.DiagnosticCategory.Error, key: "Spread_types_may_only_be_created_from_object_types_2698", message: "Spread types may only be created from object types." },
+        Static_property_0_conflicts_with_built_in_property_Function_0_of_constructor_function_1: { code: 2699, category: ts.DiagnosticCategory.Error, key: "Static_property_0_conflicts_with_built_in_property_Function_0_of_constructor_function_1_2699", message: "Static property '{0}' conflicts with built-in property 'Function.{0}' of constructor function '{1}'." },
+        Rest_types_may_only_be_created_from_object_types: { code: 2700, category: ts.DiagnosticCategory.Error, key: "Rest_types_may_only_be_created_from_object_types_2700", message: "Rest types may only be created from object types." },
+        The_target_of_an_object_rest_assignment_must_be_a_variable_or_a_property_access: { code: 2701, category: ts.DiagnosticCategory.Error, key: "The_target_of_an_object_rest_assignment_must_be_a_variable_or_a_property_access_2701", message: "The target of an object rest assignment must be a variable or a property access." },
+        _0_only_refers_to_a_type_but_is_being_used_as_a_namespace_here: { code: 2702, category: ts.DiagnosticCategory.Error, key: "_0_only_refers_to_a_type_but_is_being_used_as_a_namespace_here_2702", message: "'{0}' only refers to a type, but is being used as a namespace here." },
+        The_operand_of_a_delete_operator_must_be_a_property_reference: { code: 2703, category: ts.DiagnosticCategory.Error, key: "The_operand_of_a_delete_operator_must_be_a_property_reference_2703", message: "The operand of a delete operator must be a property reference." },
+        The_operand_of_a_delete_operator_cannot_be_a_read_only_property: { code: 2704, category: ts.DiagnosticCategory.Error, key: "The_operand_of_a_delete_operator_cannot_be_a_read_only_property_2704", message: "The operand of a delete operator cannot be a read-only property." },
+        An_async_function_or_method_in_ES5_SlashES3_requires_the_Promise_constructor_Make_sure_you_have_a_declaration_for_the_Promise_constructor_or_include_ES2015_in_your_lib_option: { code: 2705, category: ts.DiagnosticCategory.Error, key: "An_async_function_or_method_in_ES5_SlashES3_requires_the_Promise_constructor_Make_sure_you_have_a_de_2705", message: "An async function or method in ES5/ES3 requires the 'Promise' constructor.  Make sure you have a declaration for the 'Promise' constructor or include 'ES2015' in your `--lib` option." },
+        Required_type_parameters_may_not_follow_optional_type_parameters: { code: 2706, category: ts.DiagnosticCategory.Error, key: "Required_type_parameters_may_not_follow_optional_type_parameters_2706", message: "Required type parameters may not follow optional type parameters." },
+        Generic_type_0_requires_between_1_and_2_type_arguments: { code: 2707, category: ts.DiagnosticCategory.Error, key: "Generic_type_0_requires_between_1_and_2_type_arguments_2707", message: "Generic type '{0}' requires between {1} and {2} type arguments." },
+        Cannot_use_namespace_0_as_a_value: { code: 2708, category: ts.DiagnosticCategory.Error, key: "Cannot_use_namespace_0_as_a_value_2708", message: "Cannot use namespace '{0}' as a value." },
+        Cannot_use_namespace_0_as_a_type: { code: 2709, category: ts.DiagnosticCategory.Error, key: "Cannot_use_namespace_0_as_a_type_2709", message: "Cannot use namespace '{0}' as a type." },
+        _0_are_specified_twice_The_attribute_named_0_will_be_overwritten: { code: 2710, category: ts.DiagnosticCategory.Error, key: "_0_are_specified_twice_The_attribute_named_0_will_be_overwritten_2710", message: "'{0}' are specified twice. The attribute named '{0}' will be overwritten." },
+        A_dynamic_import_call_returns_a_Promise_Make_sure_you_have_a_declaration_for_Promise_or_include_ES2015_in_your_lib_option: { code: 2711, category: ts.DiagnosticCategory.Error, key: "A_dynamic_import_call_returns_a_Promise_Make_sure_you_have_a_declaration_for_Promise_or_include_ES20_2711", message: "A dynamic import call returns a 'Promise'. Make sure you have a declaration for 'Promise' or include 'ES2015' in your `--lib` option." },
+        A_dynamic_import_call_in_ES5_SlashES3_requires_the_Promise_constructor_Make_sure_you_have_a_declaration_for_the_Promise_constructor_or_include_ES2015_in_your_lib_option: { code: 2712, category: ts.DiagnosticCategory.Error, key: "A_dynamic_import_call_in_ES5_SlashES3_requires_the_Promise_constructor_Make_sure_you_have_a_declarat_2712", message: "A dynamic import call in ES5/ES3 requires the 'Promise' constructor.  Make sure you have a declaration for the 'Promise' constructor or include 'ES2015' in your `--lib` option." },
         Import_declaration_0_is_using_private_name_1: { code: 4000, category: ts.DiagnosticCategory.Error, key: "Import_declaration_0_is_using_private_name_1_4000", message: "Import declaration '{0}' is using private name '{1}'." },
         Type_parameter_0_of_exported_class_has_or_is_using_private_name_1: { code: 4002, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_class_has_or_is_using_private_name_1_4002", message: "Type parameter '{0}' of exported class has or is using private name '{1}'." },
         Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1: { code: 4004, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1_4004", message: "Type parameter '{0}' of exported interface has or is using private name '{1}'." },
@@ -8137,8 +9669,8 @@ var ts;
         Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1: { code: 4014, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1_4014", message: "Type parameter '{0}' of method from exported interface has or is using private name '{1}'." },
         Type_parameter_0_of_exported_function_has_or_is_using_private_name_1: { code: 4016, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_function_has_or_is_using_private_name_1_4016", message: "Type parameter '{0}' of exported function has or is using private name '{1}'." },
         Implements_clause_of_exported_class_0_has_or_is_using_private_name_1: { code: 4019, category: ts.DiagnosticCategory.Error, key: "Implements_clause_of_exported_class_0_has_or_is_using_private_name_1_4019", message: "Implements clause of exported class '{0}' has or is using private name '{1}'." },
-        Extends_clause_of_exported_class_0_has_or_is_using_private_name_1: { code: 4020, category: ts.DiagnosticCategory.Error, key: "Extends_clause_of_exported_class_0_has_or_is_using_private_name_1_4020", message: "Extends clause of exported class '{0}' has or is using private name '{1}'." },
-        Extends_clause_of_exported_interface_0_has_or_is_using_private_name_1: { code: 4022, category: ts.DiagnosticCategory.Error, key: "Extends_clause_of_exported_interface_0_has_or_is_using_private_name_1_4022", message: "Extends clause of exported interface '{0}' has or is using private name '{1}'." },
+        extends_clause_of_exported_class_0_has_or_is_using_private_name_1: { code: 4020, category: ts.DiagnosticCategory.Error, key: "extends_clause_of_exported_class_0_has_or_is_using_private_name_1_4020", message: "'extends' clause of exported class '{0}' has or is using private name '{1}'." },
+        extends_clause_of_exported_interface_0_has_or_is_using_private_name_1: { code: 4022, category: ts.DiagnosticCategory.Error, key: "extends_clause_of_exported_interface_0_has_or_is_using_private_name_1_4022", message: "'extends' clause of exported interface '{0}' has or is using private name '{1}'." },
         Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4023, category: ts.DiagnosticCategory.Error, key: "Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named_4023", message: "Exported variable '{0}' has or is using name '{1}' from external module {2} but cannot be named." },
         Exported_variable_0_has_or_is_using_name_1_from_private_module_2: { code: 4024, category: ts.DiagnosticCategory.Error, key: "Exported_variable_0_has_or_is_using_name_1_from_private_module_2_4024", message: "Exported variable '{0}' has or is using name '{1}' from private module '{2}'." },
         Exported_variable_0_has_or_is_using_private_name_1: { code: 4025, category: ts.DiagnosticCategory.Error, key: "Exported_variable_0_has_or_is_using_private_name_1_4025", message: "Exported variable '{0}' has or is using private name '{1}'." },
@@ -8197,17 +9729,20 @@ var ts;
         Parameter_0_of_exported_function_has_or_is_using_private_name_1: { code: 4078, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_exported_function_has_or_is_using_private_name_1_4078", message: "Parameter '{0}' of exported function has or is using private name '{1}'." },
         Exported_type_alias_0_has_or_is_using_private_name_1: { code: 4081, category: ts.DiagnosticCategory.Error, key: "Exported_type_alias_0_has_or_is_using_private_name_1_4081", message: "Exported type alias '{0}' has or is using private name '{1}'." },
         Default_export_of_the_module_has_or_is_using_private_name_0: { code: 4082, category: ts.DiagnosticCategory.Error, key: "Default_export_of_the_module_has_or_is_using_private_name_0_4082", message: "Default export of the module has or is using private name '{0}'." },
+        Type_parameter_0_of_exported_type_alias_has_or_is_using_private_name_1: { code: 4083, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_type_alias_has_or_is_using_private_name_1_4083", message: "Type parameter '{0}' of exported type alias has or is using private name '{1}'." },
         Conflicting_definitions_for_0_found_at_1_and_2_Consider_installing_a_specific_version_of_this_library_to_resolve_the_conflict: { code: 4090, category: ts.DiagnosticCategory.Message, key: "Conflicting_definitions_for_0_found_at_1_and_2_Consider_installing_a_specific_version_of_this_librar_4090", message: "Conflicting definitions for '{0}' found at '{1}' and '{2}'. Consider installing a specific version of this library to resolve the conflict." },
+        Parameter_0_of_index_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2: { code: 4091, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_index_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2_4091", message: "Parameter '{0}' of index signature from exported interface has or is using name '{1}' from private module '{2}'." },
+        Parameter_0_of_index_signature_from_exported_interface_has_or_is_using_private_name_1: { code: 4092, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_index_signature_from_exported_interface_has_or_is_using_private_name_1_4092", message: "Parameter '{0}' of index signature from exported interface has or is using private name '{1}'." },
+        Property_0_of_exported_class_expression_may_not_be_private_or_protected: { code: 4094, category: ts.DiagnosticCategory.Error, key: "Property_0_of_exported_class_expression_may_not_be_private_or_protected_4094", message: "Property '{0}' of exported class expression may not be private or protected." },
         The_current_host_does_not_support_the_0_option: { code: 5001, category: ts.DiagnosticCategory.Error, key: "The_current_host_does_not_support_the_0_option_5001", message: "The current host does not support the '{0}' option." },
         Cannot_find_the_common_subdirectory_path_for_the_input_files: { code: 5009, category: ts.DiagnosticCategory.Error, key: "Cannot_find_the_common_subdirectory_path_for_the_input_files_5009", message: "Cannot find the common subdirectory path for the input files." },
         File_specification_cannot_end_in_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0: { code: 5010, category: ts.DiagnosticCategory.Error, key: "File_specification_cannot_end_in_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0_5010", message: "File specification cannot end in a recursive directory wildcard ('**'): '{0}'." },
         File_specification_cannot_contain_multiple_recursive_directory_wildcards_Asterisk_Asterisk_Colon_0: { code: 5011, category: ts.DiagnosticCategory.Error, key: "File_specification_cannot_contain_multiple_recursive_directory_wildcards_Asterisk_Asterisk_Colon_0_5011", message: "File specification cannot contain multiple recursive directory wildcards ('**'): '{0}'." },
-        Cannot_read_file_0_Colon_1: { code: 5012, category: ts.DiagnosticCategory.Error, key: "Cannot_read_file_0_Colon_1_5012", message: "Cannot read file '{0}': {1}" },
-        Unsupported_file_encoding: { code: 5013, category: ts.DiagnosticCategory.Error, key: "Unsupported_file_encoding_5013", message: "Unsupported file encoding." },
+        Cannot_read_file_0_Colon_1: { code: 5012, category: ts.DiagnosticCategory.Error, key: "Cannot_read_file_0_Colon_1_5012", message: "Cannot read file '{0}': {1}." },
         Failed_to_parse_file_0_Colon_1: { code: 5014, category: ts.DiagnosticCategory.Error, key: "Failed_to_parse_file_0_Colon_1_5014", message: "Failed to parse file '{0}': {1}." },
         Unknown_compiler_option_0: { code: 5023, category: ts.DiagnosticCategory.Error, key: "Unknown_compiler_option_0_5023", message: "Unknown compiler option '{0}'." },
         Compiler_option_0_requires_a_value_of_type_1: { code: 5024, category: ts.DiagnosticCategory.Error, key: "Compiler_option_0_requires_a_value_of_type_1_5024", message: "Compiler option '{0}' requires a value of type {1}." },
-        Could_not_write_file_0_Colon_1: { code: 5033, category: ts.DiagnosticCategory.Error, key: "Could_not_write_file_0_Colon_1_5033", message: "Could not write file '{0}': {1}" },
+        Could_not_write_file_0_Colon_1: { code: 5033, category: ts.DiagnosticCategory.Error, key: "Could_not_write_file_0_Colon_1_5033", message: "Could not write file '{0}': {1}." },
         Option_project_cannot_be_mixed_with_source_files_on_a_command_line: { code: 5042, category: ts.DiagnosticCategory.Error, key: "Option_project_cannot_be_mixed_with_source_files_on_a_command_line_5042", message: "Option 'project' cannot be mixed with source files on a command line." },
         Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES2015_or_higher: { code: 5047, category: ts.DiagnosticCategory.Error, key: "Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES_5047", message: "Option 'isolatedModules' can only be used when either option '--module' is provided or option 'target' is 'ES2015' or higher." },
         Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided: { code: 5051, category: ts.DiagnosticCategory.Error, key: "Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided_5051", message: "Option '{0} can only be used when either option '--inlineSourceMap' or option '--sourceMap' is provided." },
@@ -8216,16 +9751,17 @@ var ts;
         A_tsconfig_json_file_is_already_defined_at_Colon_0: { code: 5054, category: ts.DiagnosticCategory.Error, key: "A_tsconfig_json_file_is_already_defined_at_Colon_0_5054", message: "A 'tsconfig.json' file is already defined at: '{0}'." },
         Cannot_write_file_0_because_it_would_overwrite_input_file: { code: 5055, category: ts.DiagnosticCategory.Error, key: "Cannot_write_file_0_because_it_would_overwrite_input_file_5055", message: "Cannot write file '{0}' because it would overwrite input file." },
         Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files: { code: 5056, category: ts.DiagnosticCategory.Error, key: "Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files_5056", message: "Cannot write file '{0}' because it would be overwritten by multiple input files." },
-        Cannot_find_a_tsconfig_json_file_at_the_specified_directory_Colon_0: { code: 5057, category: ts.DiagnosticCategory.Error, key: "Cannot_find_a_tsconfig_json_file_at_the_specified_directory_Colon_0_5057", message: "Cannot find a tsconfig.json file at the specified directory: '{0}'" },
-        The_specified_path_does_not_exist_Colon_0: { code: 5058, category: ts.DiagnosticCategory.Error, key: "The_specified_path_does_not_exist_Colon_0_5058", message: "The specified path does not exist: '{0}'" },
+        Cannot_find_a_tsconfig_json_file_at_the_specified_directory_Colon_0: { code: 5057, category: ts.DiagnosticCategory.Error, key: "Cannot_find_a_tsconfig_json_file_at_the_specified_directory_Colon_0_5057", message: "Cannot find a tsconfig.json file at the specified directory: '{0}'." },
+        The_specified_path_does_not_exist_Colon_0: { code: 5058, category: ts.DiagnosticCategory.Error, key: "The_specified_path_does_not_exist_Colon_0_5058", message: "The specified path does not exist: '{0}'." },
         Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier: { code: 5059, category: ts.DiagnosticCategory.Error, key: "Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier_5059", message: "Invalid value for '--reactNamespace'. '{0}' is not a valid identifier." },
         Option_paths_cannot_be_used_without_specifying_baseUrl_option: { code: 5060, category: ts.DiagnosticCategory.Error, key: "Option_paths_cannot_be_used_without_specifying_baseUrl_option_5060", message: "Option 'paths' cannot be used without specifying '--baseUrl' option." },
-        Pattern_0_can_have_at_most_one_Asterisk_character: { code: 5061, category: ts.DiagnosticCategory.Error, key: "Pattern_0_can_have_at_most_one_Asterisk_character_5061", message: "Pattern '{0}' can have at most one '*' character" },
-        Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character: { code: 5062, category: ts.DiagnosticCategory.Error, key: "Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character_5062", message: "Substitution '{0}' in pattern '{1}' in can have at most one '*' character" },
+        Pattern_0_can_have_at_most_one_Asterisk_character: { code: 5061, category: ts.DiagnosticCategory.Error, key: "Pattern_0_can_have_at_most_one_Asterisk_character_5061", message: "Pattern '{0}' can have at most one '*' character." },
+        Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character: { code: 5062, category: ts.DiagnosticCategory.Error, key: "Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character_5062", message: "Substitution '{0}' in pattern '{1}' in can have at most one '*' character." },
         Substitutions_for_pattern_0_should_be_an_array: { code: 5063, category: ts.DiagnosticCategory.Error, key: "Substitutions_for_pattern_0_should_be_an_array_5063", message: "Substitutions for pattern '{0}' should be an array." },
         Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2: { code: 5064, category: ts.DiagnosticCategory.Error, key: "Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2_5064", message: "Substitution '{0}' for pattern '{1}' has incorrect type, expected 'string', got '{2}'." },
         File_specification_cannot_contain_a_parent_directory_that_appears_after_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0: { code: 5065, category: ts.DiagnosticCategory.Error, key: "File_specification_cannot_contain_a_parent_directory_that_appears_after_a_recursive_directory_wildca_5065", message: "File specification cannot contain a parent directory ('..') that appears after a recursive directory wildcard ('**'): '{0}'." },
         Substitutions_for_pattern_0_shouldn_t_be_an_empty_array: { code: 5066, category: ts.DiagnosticCategory.Error, key: "Substitutions_for_pattern_0_shouldn_t_be_an_empty_array_5066", message: "Substitutions for pattern '{0}' shouldn't be an empty array." },
+        Invalid_value_for_jsxFactory_0_is_not_a_valid_identifier_or_qualified_name: { code: 5067, category: ts.DiagnosticCategory.Error, key: "Invalid_value_for_jsxFactory_0_is_not_a_valid_identifier_or_qualified_name_5067", message: "Invalid value for 'jsxFactory'. '{0}' is not a valid identifier or qualified-name." },
         Concatenate_and_emit_output_to_single_file: { code: 6001, category: ts.DiagnosticCategory.Message, key: "Concatenate_and_emit_output_to_single_file_6001", message: "Concatenate and emit output to single file." },
         Generates_corresponding_d_ts_file: { code: 6002, category: ts.DiagnosticCategory.Message, key: "Generates_corresponding_d_ts_file_6002", message: "Generates corresponding '.d.ts' file." },
         Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations: { code: 6003, category: ts.DiagnosticCategory.Message, key: "Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations_6003", message: "Specify the location where debugger should locate map files instead of generated locations." },
@@ -8238,11 +9774,11 @@ var ts;
         Do_not_emit_outputs: { code: 6010, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_outputs_6010", message: "Do not emit outputs." },
         Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typechecking: { code: 6011, category: ts.DiagnosticCategory.Message, key: "Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typech_6011", message: "Allow default imports from modules with no default export. This does not affect code emit, just typechecking." },
         Skip_type_checking_of_declaration_files: { code: 6012, category: ts.DiagnosticCategory.Message, key: "Skip_type_checking_of_declaration_files_6012", message: "Skip type checking of declaration files." },
-        Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015: { code: 6015, category: ts.DiagnosticCategory.Message, key: "Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015_6015", message: "Specify ECMAScript target version: 'ES3' (default), 'ES5', or 'ES2015'" },
-        Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015: { code: 6016, category: ts.DiagnosticCategory.Message, key: "Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015_6016", message: "Specify module code generation: 'commonjs', 'amd', 'system', 'umd' or 'es2015'" },
+        Specify_ECMAScript_target_version_Colon_ES3_default_ES5_ES2015_ES2016_ES2017_or_ESNEXT: { code: 6015, category: ts.DiagnosticCategory.Message, key: "Specify_ECMAScript_target_version_Colon_ES3_default_ES5_ES2015_ES2016_ES2017_or_ESNEXT_6015", message: "Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', or 'ESNEXT'." },
+        Specify_module_code_generation_Colon_commonjs_amd_system_umd_es2015_or_ESNext: { code: 6016, category: ts.DiagnosticCategory.Message, key: "Specify_module_code_generation_Colon_commonjs_amd_system_umd_es2015_or_ESNext_6016", message: "Specify module code generation: 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'." },
         Print_this_message: { code: 6017, category: ts.DiagnosticCategory.Message, key: "Print_this_message_6017", message: "Print this message." },
         Print_the_compiler_s_version: { code: 6019, category: ts.DiagnosticCategory.Message, key: "Print_the_compiler_s_version_6019", message: "Print the compiler's version." },
-        Compile_the_project_in_the_given_directory: { code: 6020, category: ts.DiagnosticCategory.Message, key: "Compile_the_project_in_the_given_directory_6020", message: "Compile the project in the given directory." },
+        Compile_the_project_given_the_path_to_its_configuration_file_or_to_a_folder_with_a_tsconfig_json: { code: 6020, category: ts.DiagnosticCategory.Message, key: "Compile_the_project_given_the_path_to_its_configuration_file_or_to_a_folder_with_a_tsconfig_json_6020", message: "Compile the project given the path to its configuration file, or to a folder with a 'tsconfig.json'." },
         Syntax_Colon_0: { code: 6023, category: ts.DiagnosticCategory.Message, key: "Syntax_Colon_0_6023", message: "Syntax: {0}" },
         options: { code: 6024, category: ts.DiagnosticCategory.Message, key: "options_6024", message: "options" },
         file: { code: 6025, category: ts.DiagnosticCategory.Message, key: "file_6025", message: "file" },
@@ -8257,11 +9793,12 @@ var ts;
         LOCATION: { code: 6037, category: ts.DiagnosticCategory.Message, key: "LOCATION_6037", message: "LOCATION" },
         DIRECTORY: { code: 6038, category: ts.DiagnosticCategory.Message, key: "DIRECTORY_6038", message: "DIRECTORY" },
         STRATEGY: { code: 6039, category: ts.DiagnosticCategory.Message, key: "STRATEGY_6039", message: "STRATEGY" },
+        FILE_OR_DIRECTORY: { code: 6040, category: ts.DiagnosticCategory.Message, key: "FILE_OR_DIRECTORY_6040", message: "FILE OR DIRECTORY" },
         Compilation_complete_Watching_for_file_changes: { code: 6042, category: ts.DiagnosticCategory.Message, key: "Compilation_complete_Watching_for_file_changes_6042", message: "Compilation complete. Watching for file changes." },
         Generates_corresponding_map_file: { code: 6043, category: ts.DiagnosticCategory.Message, key: "Generates_corresponding_map_file_6043", message: "Generates corresponding '.map' file." },
         Compiler_option_0_expects_an_argument: { code: 6044, category: ts.DiagnosticCategory.Error, key: "Compiler_option_0_expects_an_argument_6044", message: "Compiler option '{0}' expects an argument." },
         Unterminated_quoted_string_in_response_file_0: { code: 6045, category: ts.DiagnosticCategory.Error, key: "Unterminated_quoted_string_in_response_file_0_6045", message: "Unterminated quoted string in response file '{0}'." },
-        Argument_for_0_option_must_be_Colon_1: { code: 6046, category: ts.DiagnosticCategory.Error, key: "Argument_for_0_option_must_be_Colon_1_6046", message: "Argument for '{0}' option must be: {1}" },
+        Argument_for_0_option_must_be_Colon_1: { code: 6046, category: ts.DiagnosticCategory.Error, key: "Argument_for_0_option_must_be_Colon_1_6046", message: "Argument for '{0}' option must be: {1}." },
         Locale_must_be_of_the_form_language_or_language_territory_For_example_0_or_1: { code: 6048, category: ts.DiagnosticCategory.Error, key: "Locale_must_be_of_the_form_language_or_language_territory_For_example_0_or_1_6048", message: "Locale must be of the form <language> or <language>-<territory>. For example '{0}' or '{1}'." },
         Unsupported_locale_0: { code: 6049, category: ts.DiagnosticCategory.Error, key: "Unsupported_locale_0_6049", message: "Unsupported locale '{0}'." },
         Unable_to_open_file_0: { code: 6050, category: ts.DiagnosticCategory.Error, key: "Unable_to_open_file_0_6050", message: "Unable to open file '{0}'." },
@@ -8283,17 +9820,18 @@ var ts;
         Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file: { code: 6070, category: ts.DiagnosticCategory.Message, key: "Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file_6070", message: "Initializes a TypeScript project and creates a tsconfig.json file." },
         Successfully_created_a_tsconfig_json_file: { code: 6071, category: ts.DiagnosticCategory.Message, key: "Successfully_created_a_tsconfig_json_file_6071", message: "Successfully created a tsconfig.json file." },
         Suppress_excess_property_checks_for_object_literals: { code: 6072, category: ts.DiagnosticCategory.Message, key: "Suppress_excess_property_checks_for_object_literals_6072", message: "Suppress excess property checks for object literals." },
-        Stylize_errors_and_messages_using_color_and_context_experimental: { code: 6073, category: ts.DiagnosticCategory.Message, key: "Stylize_errors_and_messages_using_color_and_context_experimental_6073", message: "Stylize errors and messages using color and context. (experimental)" },
+        Stylize_errors_and_messages_using_color_and_context_experimental: { code: 6073, category: ts.DiagnosticCategory.Message, key: "Stylize_errors_and_messages_using_color_and_context_experimental_6073", message: "Stylize errors and messages using color and context (experimental)." },
         Do_not_report_errors_on_unused_labels: { code: 6074, category: ts.DiagnosticCategory.Message, key: "Do_not_report_errors_on_unused_labels_6074", message: "Do not report errors on unused labels." },
         Report_error_when_not_all_code_paths_in_function_return_a_value: { code: 6075, category: ts.DiagnosticCategory.Message, key: "Report_error_when_not_all_code_paths_in_function_return_a_value_6075", message: "Report error when not all code paths in function return a value." },
         Report_errors_for_fallthrough_cases_in_switch_statement: { code: 6076, category: ts.DiagnosticCategory.Message, key: "Report_errors_for_fallthrough_cases_in_switch_statement_6076", message: "Report errors for fallthrough cases in switch statement." },
         Do_not_report_errors_on_unreachable_code: { code: 6077, category: ts.DiagnosticCategory.Message, key: "Do_not_report_errors_on_unreachable_code_6077", message: "Do not report errors on unreachable code." },
         Disallow_inconsistently_cased_references_to_the_same_file: { code: 6078, category: ts.DiagnosticCategory.Message, key: "Disallow_inconsistently_cased_references_to_the_same_file_6078", message: "Disallow inconsistently-cased references to the same file." },
         Specify_library_files_to_be_included_in_the_compilation_Colon: { code: 6079, category: ts.DiagnosticCategory.Message, key: "Specify_library_files_to_be_included_in_the_compilation_Colon_6079", message: "Specify library files to be included in the compilation: " },
-        Specify_JSX_code_generation_Colon_preserve_or_react: { code: 6080, category: ts.DiagnosticCategory.Message, key: "Specify_JSX_code_generation_Colon_preserve_or_react_6080", message: "Specify JSX code generation: 'preserve' or 'react'" },
+        Specify_JSX_code_generation_Colon_preserve_react_native_or_react: { code: 6080, category: ts.DiagnosticCategory.Message, key: "Specify_JSX_code_generation_Colon_preserve_react_native_or_react_6080", message: "Specify JSX code generation: 'preserve', 'react-native', or 'react'." },
+        File_0_has_an_unsupported_extension_so_skipping_it: { code: 6081, category: ts.DiagnosticCategory.Message, key: "File_0_has_an_unsupported_extension_so_skipping_it_6081", message: "File '{0}' has an unsupported extension, so skipping it." },
         Only_amd_and_system_modules_are_supported_alongside_0: { code: 6082, category: ts.DiagnosticCategory.Error, key: "Only_amd_and_system_modules_are_supported_alongside_0_6082", message: "Only 'amd' and 'system' modules are supported alongside --{0}." },
         Base_directory_to_resolve_non_absolute_module_names: { code: 6083, category: ts.DiagnosticCategory.Message, key: "Base_directory_to_resolve_non_absolute_module_names_6083", message: "Base directory to resolve non-absolute module names." },
-        Specify_the_object_invoked_for_createElement_and_spread_when_targeting_react_JSX_emit: { code: 6084, category: ts.DiagnosticCategory.Message, key: "Specify_the_object_invoked_for_createElement_and_spread_when_targeting_react_JSX_emit_6084", message: "Specify the object invoked for createElement and __spread when targeting 'react' JSX emit" },
+        Deprecated_Use_jsxFactory_instead_Specify_the_object_invoked_for_createElement_when_targeting_react_JSX_emit: { code: 6084, category: ts.DiagnosticCategory.Message, key: "Deprecated_Use_jsxFactory_instead_Specify_the_object_invoked_for_createElement_when_targeting_react__6084", message: "[Deprecated] Use '--jsxFactory' instead. Specify the object invoked for createElement when targeting 'react' JSX emit" },
         Enable_tracing_of_the_name_resolution_process: { code: 6085, category: ts.DiagnosticCategory.Message, key: "Enable_tracing_of_the_name_resolution_process_6085", message: "Enable tracing of the name resolution process." },
         Resolving_module_0_from_1: { code: 6086, category: ts.DiagnosticCategory.Message, key: "Resolving_module_0_from_1_6086", message: "======== Resolving module '{0}' from '{1}'. ========" },
         Explicitly_specified_module_resolution_kind_Colon_0: { code: 6087, category: ts.DiagnosticCategory.Message, key: "Explicitly_specified_module_resolution_kind_Colon_0_6087", message: "Explicitly specified module resolution kind: '{0}'." },
@@ -8304,23 +9842,23 @@ var ts;
         Module_name_0_matched_pattern_1: { code: 6092, category: ts.DiagnosticCategory.Message, key: "Module_name_0_matched_pattern_1_6092", message: "Module name '{0}', matched pattern '{1}'." },
         Trying_substitution_0_candidate_module_location_Colon_1: { code: 6093, category: ts.DiagnosticCategory.Message, key: "Trying_substitution_0_candidate_module_location_Colon_1_6093", message: "Trying substitution '{0}', candidate module location: '{1}'." },
         Resolving_module_name_0_relative_to_base_url_1_2: { code: 6094, category: ts.DiagnosticCategory.Message, key: "Resolving_module_name_0_relative_to_base_url_1_2_6094", message: "Resolving module name '{0}' relative to base url '{1}' - '{2}'." },
-        Loading_module_as_file_Slash_folder_candidate_module_location_0: { code: 6095, category: ts.DiagnosticCategory.Message, key: "Loading_module_as_file_Slash_folder_candidate_module_location_0_6095", message: "Loading module as file / folder, candidate module location '{0}'." },
+        Loading_module_as_file_Slash_folder_candidate_module_location_0_target_file_type_1: { code: 6095, category: ts.DiagnosticCategory.Message, key: "Loading_module_as_file_Slash_folder_candidate_module_location_0_target_file_type_1_6095", message: "Loading module as file / folder, candidate module location '{0}', target file type '{1}'." },
         File_0_does_not_exist: { code: 6096, category: ts.DiagnosticCategory.Message, key: "File_0_does_not_exist_6096", message: "File '{0}' does not exist." },
         File_0_exist_use_it_as_a_name_resolution_result: { code: 6097, category: ts.DiagnosticCategory.Message, key: "File_0_exist_use_it_as_a_name_resolution_result_6097", message: "File '{0}' exist - use it as a name resolution result." },
-        Loading_module_0_from_node_modules_folder: { code: 6098, category: ts.DiagnosticCategory.Message, key: "Loading_module_0_from_node_modules_folder_6098", message: "Loading module '{0}' from 'node_modules' folder." },
+        Loading_module_0_from_node_modules_folder_target_file_type_1: { code: 6098, category: ts.DiagnosticCategory.Message, key: "Loading_module_0_from_node_modules_folder_target_file_type_1_6098", message: "Loading module '{0}' from 'node_modules' folder, target file type '{1}'." },
         Found_package_json_at_0: { code: 6099, category: ts.DiagnosticCategory.Message, key: "Found_package_json_at_0_6099", message: "Found 'package.json' at '{0}'." },
-        package_json_does_not_have_types_field: { code: 6100, category: ts.DiagnosticCategory.Message, key: "package_json_does_not_have_types_field_6100", message: "'package.json' does not have 'types' field." },
+        package_json_does_not_have_a_0_field: { code: 6100, category: ts.DiagnosticCategory.Message, key: "package_json_does_not_have_a_0_field_6100", message: "'package.json' does not have a '{0}' field." },
         package_json_has_0_field_1_that_references_2: { code: 6101, category: ts.DiagnosticCategory.Message, key: "package_json_has_0_field_1_that_references_2_6101", message: "'package.json' has '{0}' field '{1}' that references '{2}'." },
         Allow_javascript_files_to_be_compiled: { code: 6102, category: ts.DiagnosticCategory.Message, key: "Allow_javascript_files_to_be_compiled_6102", message: "Allow javascript files to be compiled." },
         Option_0_should_have_array_of_strings_as_a_value: { code: 6103, category: ts.DiagnosticCategory.Error, key: "Option_0_should_have_array_of_strings_as_a_value_6103", message: "Option '{0}' should have array of strings as a value." },
         Checking_if_0_is_the_longest_matching_prefix_for_1_2: { code: 6104, category: ts.DiagnosticCategory.Message, key: "Checking_if_0_is_the_longest_matching_prefix_for_1_2_6104", message: "Checking if '{0}' is the longest matching prefix for '{1}' - '{2}'." },
         Expected_type_of_0_field_in_package_json_to_be_string_got_1: { code: 6105, category: ts.DiagnosticCategory.Message, key: "Expected_type_of_0_field_in_package_json_to_be_string_got_1_6105", message: "Expected type of '{0}' field in 'package.json' to be 'string', got '{1}'." },
-        baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1: { code: 6106, category: ts.DiagnosticCategory.Message, key: "baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1_6106", message: "'baseUrl' option is set to '{0}', using this value to resolve non-relative module name '{1}'" },
-        rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0: { code: 6107, category: ts.DiagnosticCategory.Message, key: "rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0_6107", message: "'rootDirs' option is set, using it to resolve relative module name '{0}'" },
-        Longest_matching_prefix_for_0_is_1: { code: 6108, category: ts.DiagnosticCategory.Message, key: "Longest_matching_prefix_for_0_is_1_6108", message: "Longest matching prefix for '{0}' is '{1}'" },
-        Loading_0_from_the_root_dir_1_candidate_location_2: { code: 6109, category: ts.DiagnosticCategory.Message, key: "Loading_0_from_the_root_dir_1_candidate_location_2_6109", message: "Loading '{0}' from the root dir '{1}', candidate location '{2}'" },
-        Trying_other_entries_in_rootDirs: { code: 6110, category: ts.DiagnosticCategory.Message, key: "Trying_other_entries_in_rootDirs_6110", message: "Trying other entries in 'rootDirs'" },
-        Module_resolution_using_rootDirs_has_failed: { code: 6111, category: ts.DiagnosticCategory.Message, key: "Module_resolution_using_rootDirs_has_failed_6111", message: "Module resolution using 'rootDirs' has failed" },
+        baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1: { code: 6106, category: ts.DiagnosticCategory.Message, key: "baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1_6106", message: "'baseUrl' option is set to '{0}', using this value to resolve non-relative module name '{1}'." },
+        rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0: { code: 6107, category: ts.DiagnosticCategory.Message, key: "rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0_6107", message: "'rootDirs' option is set, using it to resolve relative module name '{0}'." },
+        Longest_matching_prefix_for_0_is_1: { code: 6108, category: ts.DiagnosticCategory.Message, key: "Longest_matching_prefix_for_0_is_1_6108", message: "Longest matching prefix for '{0}' is '{1}'." },
+        Loading_0_from_the_root_dir_1_candidate_location_2: { code: 6109, category: ts.DiagnosticCategory.Message, key: "Loading_0_from_the_root_dir_1_candidate_location_2_6109", message: "Loading '{0}' from the root dir '{1}', candidate location '{2}'." },
+        Trying_other_entries_in_rootDirs: { code: 6110, category: ts.DiagnosticCategory.Message, key: "Trying_other_entries_in_rootDirs_6110", message: "Trying other entries in 'rootDirs'." },
+        Module_resolution_using_rootDirs_has_failed: { code: 6111, category: ts.DiagnosticCategory.Message, key: "Module_resolution_using_rootDirs_has_failed_6111", message: "Module resolution using 'rootDirs' has failed." },
         Do_not_emit_use_strict_directives_in_module_output: { code: 6112, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_use_strict_directives_in_module_output_6112", message: "Do not emit 'use strict' directives in module output." },
         Enable_strict_null_checks: { code: 6113, category: ts.DiagnosticCategory.Message, key: "Enable_strict_null_checks_6113", message: "Enable strict null checks." },
         Unknown_option_excludes_Did_you_mean_exclude: { code: 6114, category: ts.DiagnosticCategory.Error, key: "Unknown_option_excludes_Did_you_mean_exclude_6114", message: "Unknown option 'excludes'. Did you mean 'exclude'?" },
@@ -8330,26 +9868,71 @@ var ts;
         Resolving_from_node_modules_folder: { code: 6118, category: ts.DiagnosticCategory.Message, key: "Resolving_from_node_modules_folder_6118", message: "Resolving from node_modules folder..." },
         Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2: { code: 6119, category: ts.DiagnosticCategory.Message, key: "Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2_6119", message: "======== Type reference directive '{0}' was successfully resolved to '{1}', primary: {2}. ========" },
         Type_reference_directive_0_was_not_resolved: { code: 6120, category: ts.DiagnosticCategory.Message, key: "Type_reference_directive_0_was_not_resolved_6120", message: "======== Type reference directive '{0}' was not resolved. ========" },
-        Resolving_with_primary_search_path_0: { code: 6121, category: ts.DiagnosticCategory.Message, key: "Resolving_with_primary_search_path_0_6121", message: "Resolving with primary search path '{0}'" },
+        Resolving_with_primary_search_path_0: { code: 6121, category: ts.DiagnosticCategory.Message, key: "Resolving_with_primary_search_path_0_6121", message: "Resolving with primary search path '{0}'." },
         Root_directory_cannot_be_determined_skipping_primary_search_paths: { code: 6122, category: ts.DiagnosticCategory.Message, key: "Root_directory_cannot_be_determined_skipping_primary_search_paths_6122", message: "Root directory cannot be determined, skipping primary search paths." },
         Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set: { code: 6123, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set_6123", message: "======== Resolving type reference directive '{0}', containing file '{1}', root directory not set. ========" },
         Type_declaration_files_to_be_included_in_compilation: { code: 6124, category: ts.DiagnosticCategory.Message, key: "Type_declaration_files_to_be_included_in_compilation_6124", message: "Type declaration files to be included in compilation." },
-        Looking_up_in_node_modules_folder_initial_location_0: { code: 6125, category: ts.DiagnosticCategory.Message, key: "Looking_up_in_node_modules_folder_initial_location_0_6125", message: "Looking up in 'node_modules' folder, initial location '{0}'" },
+        Looking_up_in_node_modules_folder_initial_location_0: { code: 6125, category: ts.DiagnosticCategory.Message, key: "Looking_up_in_node_modules_folder_initial_location_0_6125", message: "Looking up in 'node_modules' folder, initial location '{0}'." },
         Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_modules_folder: { code: 6126, category: ts.DiagnosticCategory.Message, key: "Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_mod_6126", message: "Containing file is not specified and root directory cannot be determined, skipping lookup in 'node_modules' folder." },
         Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1: { code: 6127, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1_6127", message: "======== Resolving type reference directive '{0}', containing file not set, root directory '{1}'. ========" },
         Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set: { code: 6128, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set_6128", message: "======== Resolving type reference directive '{0}', containing file not set, root directory not set. ========" },
         The_config_file_0_found_doesn_t_contain_any_source_files: { code: 6129, category: ts.DiagnosticCategory.Error, key: "The_config_file_0_found_doesn_t_contain_any_source_files_6129", message: "The config file '{0}' found doesn't contain any source files." },
-        Resolving_real_path_for_0_result_1: { code: 6130, category: ts.DiagnosticCategory.Message, key: "Resolving_real_path_for_0_result_1_6130", message: "Resolving real path for '{0}', result '{1}'" },
+        Resolving_real_path_for_0_result_1: { code: 6130, category: ts.DiagnosticCategory.Message, key: "Resolving_real_path_for_0_result_1_6130", message: "Resolving real path for '{0}', result '{1}'." },
         Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system: { code: 6131, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system_6131", message: "Cannot compile modules using option '{0}' unless the '--module' flag is 'amd' or 'system'." },
-        File_name_0_has_a_1_extension_stripping_it: { code: 6132, category: ts.DiagnosticCategory.Message, key: "File_name_0_has_a_1_extension_stripping_it_6132", message: "File name '{0}' has a '{1}' extension - stripping it" },
+        File_name_0_has_a_1_extension_stripping_it: { code: 6132, category: ts.DiagnosticCategory.Message, key: "File_name_0_has_a_1_extension_stripping_it_6132", message: "File name '{0}' has a '{1}' extension - stripping it." },
         _0_is_declared_but_never_used: { code: 6133, category: ts.DiagnosticCategory.Error, key: "_0_is_declared_but_never_used_6133", message: "'{0}' is declared but never used." },
         Report_errors_on_unused_locals: { code: 6134, category: ts.DiagnosticCategory.Message, key: "Report_errors_on_unused_locals_6134", message: "Report errors on unused locals." },
         Report_errors_on_unused_parameters: { code: 6135, category: ts.DiagnosticCategory.Message, key: "Report_errors_on_unused_parameters_6135", message: "Report errors on unused parameters." },
-        The_maximum_dependency_depth_to_search_under_node_modules_and_load_JavaScript_files: { code: 6136, category: ts.DiagnosticCategory.Message, key: "The_maximum_dependency_depth_to_search_under_node_modules_and_load_JavaScript_files_6136", message: "The maximum dependency depth to search under node_modules and load JavaScript files" },
-        No_types_specified_in_package_json_but_allowJs_is_set_so_returning_main_value_of_0: { code: 6137, category: ts.DiagnosticCategory.Message, key: "No_types_specified_in_package_json_but_allowJs_is_set_so_returning_main_value_of_0_6137", message: "No types specified in 'package.json' but 'allowJs' is set, so returning 'main' value of '{0}'" },
+        The_maximum_dependency_depth_to_search_under_node_modules_and_load_JavaScript_files: { code: 6136, category: ts.DiagnosticCategory.Message, key: "The_maximum_dependency_depth_to_search_under_node_modules_and_load_JavaScript_files_6136", message: "The maximum dependency depth to search under node_modules and load JavaScript files." },
+        Cannot_import_type_declaration_files_Consider_importing_0_instead_of_1: { code: 6137, category: ts.DiagnosticCategory.Error, key: "Cannot_import_type_declaration_files_Consider_importing_0_instead_of_1_6137", message: "Cannot import type declaration files. Consider importing '{0}' instead of '{1}'." },
         Property_0_is_declared_but_never_used: { code: 6138, category: ts.DiagnosticCategory.Error, key: "Property_0_is_declared_but_never_used_6138", message: "Property '{0}' is declared but never used." },
         Import_emit_helpers_from_tslib: { code: 6139, category: ts.DiagnosticCategory.Message, key: "Import_emit_helpers_from_tslib_6139", message: "Import emit helpers from 'tslib'." },
         Auto_discovery_for_typings_is_enabled_in_project_0_Running_extra_resolution_pass_for_module_1_using_cache_location_2: { code: 6140, category: ts.DiagnosticCategory.Error, key: "Auto_discovery_for_typings_is_enabled_in_project_0_Running_extra_resolution_pass_for_module_1_using__6140", message: "Auto discovery for typings is enabled in project '{0}'. Running extra resolution pass for module '{1}' using cache location '{2}'." },
+        Parse_in_strict_mode_and_emit_use_strict_for_each_source_file: { code: 6141, category: ts.DiagnosticCategory.Message, key: "Parse_in_strict_mode_and_emit_use_strict_for_each_source_file_6141", message: "Parse in strict mode and emit \"use strict\" for each source file." },
+        Module_0_was_resolved_to_1_but_jsx_is_not_set: { code: 6142, category: ts.DiagnosticCategory.Error, key: "Module_0_was_resolved_to_1_but_jsx_is_not_set_6142", message: "Module '{0}' was resolved to '{1}', but '--jsx' is not set." },
+        Module_0_was_resolved_to_1_but_allowJs_is_not_set: { code: 6143, category: ts.DiagnosticCategory.Error, key: "Module_0_was_resolved_to_1_but_allowJs_is_not_set_6143", message: "Module '{0}' was resolved to '{1}', but '--allowJs' is not set." },
+        Module_0_was_resolved_as_locally_declared_ambient_module_in_file_1: { code: 6144, category: ts.DiagnosticCategory.Message, key: "Module_0_was_resolved_as_locally_declared_ambient_module_in_file_1_6144", message: "Module '{0}' was resolved as locally declared ambient module in file '{1}'." },
+        Module_0_was_resolved_as_ambient_module_declared_in_1_since_this_file_was_not_modified: { code: 6145, category: ts.DiagnosticCategory.Message, key: "Module_0_was_resolved_as_ambient_module_declared_in_1_since_this_file_was_not_modified_6145", message: "Module '{0}' was resolved as ambient module declared in '{1}' since this file was not modified." },
+        Specify_the_JSX_factory_function_to_use_when_targeting_react_JSX_emit_e_g_React_createElement_or_h: { code: 6146, category: ts.DiagnosticCategory.Message, key: "Specify_the_JSX_factory_function_to_use_when_targeting_react_JSX_emit_e_g_React_createElement_or_h_6146", message: "Specify the JSX factory function to use when targeting 'react' JSX emit, e.g. 'React.createElement' or 'h'." },
+        Resolution_for_module_0_was_found_in_cache: { code: 6147, category: ts.DiagnosticCategory.Message, key: "Resolution_for_module_0_was_found_in_cache_6147", message: "Resolution for module '{0}' was found in cache." },
+        Directory_0_does_not_exist_skipping_all_lookups_in_it: { code: 6148, category: ts.DiagnosticCategory.Message, key: "Directory_0_does_not_exist_skipping_all_lookups_in_it_6148", message: "Directory '{0}' does not exist, skipping all lookups in it." },
+        Show_diagnostic_information: { code: 6149, category: ts.DiagnosticCategory.Message, key: "Show_diagnostic_information_6149", message: "Show diagnostic information." },
+        Show_verbose_diagnostic_information: { code: 6150, category: ts.DiagnosticCategory.Message, key: "Show_verbose_diagnostic_information_6150", message: "Show verbose diagnostic information." },
+        Emit_a_single_file_with_source_maps_instead_of_having_a_separate_file: { code: 6151, category: ts.DiagnosticCategory.Message, key: "Emit_a_single_file_with_source_maps_instead_of_having_a_separate_file_6151", message: "Emit a single file with source maps instead of having a separate file." },
+        Emit_the_source_alongside_the_sourcemaps_within_a_single_file_requires_inlineSourceMap_or_sourceMap_to_be_set: { code: 6152, category: ts.DiagnosticCategory.Message, key: "Emit_the_source_alongside_the_sourcemaps_within_a_single_file_requires_inlineSourceMap_or_sourceMap__6152", message: "Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set." },
+        Transpile_each_file_as_a_separate_module_similar_to_ts_transpileModule: { code: 6153, category: ts.DiagnosticCategory.Message, key: "Transpile_each_file_as_a_separate_module_similar_to_ts_transpileModule_6153", message: "Transpile each file as a separate module (similar to 'ts.transpileModule')." },
+        Print_names_of_generated_files_part_of_the_compilation: { code: 6154, category: ts.DiagnosticCategory.Message, key: "Print_names_of_generated_files_part_of_the_compilation_6154", message: "Print names of generated files part of the compilation." },
+        Print_names_of_files_part_of_the_compilation: { code: 6155, category: ts.DiagnosticCategory.Message, key: "Print_names_of_files_part_of_the_compilation_6155", message: "Print names of files part of the compilation." },
+        The_locale_used_when_displaying_messages_to_the_user_e_g_en_us: { code: 6156, category: ts.DiagnosticCategory.Message, key: "The_locale_used_when_displaying_messages_to_the_user_e_g_en_us_6156", message: "The locale used when displaying messages to the user (e.g. 'en-us')" },
+        Do_not_generate_custom_helper_functions_like_extends_in_compiled_output: { code: 6157, category: ts.DiagnosticCategory.Message, key: "Do_not_generate_custom_helper_functions_like_extends_in_compiled_output_6157", message: "Do not generate custom helper functions like '__extends' in compiled output." },
+        Do_not_include_the_default_library_file_lib_d_ts: { code: 6158, category: ts.DiagnosticCategory.Message, key: "Do_not_include_the_default_library_file_lib_d_ts_6158", message: "Do not include the default library file (lib.d.ts)." },
+        Do_not_add_triple_slash_references_or_imported_modules_to_the_list_of_compiled_files: { code: 6159, category: ts.DiagnosticCategory.Message, key: "Do_not_add_triple_slash_references_or_imported_modules_to_the_list_of_compiled_files_6159", message: "Do not add triple-slash references or imported modules to the list of compiled files." },
+        Deprecated_Use_skipLibCheck_instead_Skip_type_checking_of_default_library_declaration_files: { code: 6160, category: ts.DiagnosticCategory.Message, key: "Deprecated_Use_skipLibCheck_instead_Skip_type_checking_of_default_library_declaration_files_6160", message: "[Deprecated] Use '--skipLibCheck' instead. Skip type checking of default library declaration files." },
+        List_of_folders_to_include_type_definitions_from: { code: 6161, category: ts.DiagnosticCategory.Message, key: "List_of_folders_to_include_type_definitions_from_6161", message: "List of folders to include type definitions from." },
+        Disable_size_limitations_on_JavaScript_projects: { code: 6162, category: ts.DiagnosticCategory.Message, key: "Disable_size_limitations_on_JavaScript_projects_6162", message: "Disable size limitations on JavaScript projects." },
+        The_character_set_of_the_input_files: { code: 6163, category: ts.DiagnosticCategory.Message, key: "The_character_set_of_the_input_files_6163", message: "The character set of the input files." },
+        Emit_a_UTF_8_Byte_Order_Mark_BOM_in_the_beginning_of_output_files: { code: 6164, category: ts.DiagnosticCategory.Message, key: "Emit_a_UTF_8_Byte_Order_Mark_BOM_in_the_beginning_of_output_files_6164", message: "Emit a UTF-8 Byte Order Mark (BOM) in the beginning of output files." },
+        Do_not_truncate_error_messages: { code: 6165, category: ts.DiagnosticCategory.Message, key: "Do_not_truncate_error_messages_6165", message: "Do not truncate error messages." },
+        Output_directory_for_generated_declaration_files: { code: 6166, category: ts.DiagnosticCategory.Message, key: "Output_directory_for_generated_declaration_files_6166", message: "Output directory for generated declaration files." },
+        A_series_of_entries_which_re_map_imports_to_lookup_locations_relative_to_the_baseUrl: { code: 6167, category: ts.DiagnosticCategory.Message, key: "A_series_of_entries_which_re_map_imports_to_lookup_locations_relative_to_the_baseUrl_6167", message: "A series of entries which re-map imports to lookup locations relative to the 'baseUrl'." },
+        List_of_root_folders_whose_combined_content_represents_the_structure_of_the_project_at_runtime: { code: 6168, category: ts.DiagnosticCategory.Message, key: "List_of_root_folders_whose_combined_content_represents_the_structure_of_the_project_at_runtime_6168", message: "List of root folders whose combined content represents the structure of the project at runtime." },
+        Show_all_compiler_options: { code: 6169, category: ts.DiagnosticCategory.Message, key: "Show_all_compiler_options_6169", message: "Show all compiler options." },
+        Deprecated_Use_outFile_instead_Concatenate_and_emit_output_to_single_file: { code: 6170, category: ts.DiagnosticCategory.Message, key: "Deprecated_Use_outFile_instead_Concatenate_and_emit_output_to_single_file_6170", message: "[Deprecated] Use '--outFile' instead. Concatenate and emit output to single file" },
+        Command_line_Options: { code: 6171, category: ts.DiagnosticCategory.Message, key: "Command_line_Options_6171", message: "Command-line Options" },
+        Basic_Options: { code: 6172, category: ts.DiagnosticCategory.Message, key: "Basic_Options_6172", message: "Basic Options" },
+        Strict_Type_Checking_Options: { code: 6173, category: ts.DiagnosticCategory.Message, key: "Strict_Type_Checking_Options_6173", message: "Strict Type-Checking Options" },
+        Module_Resolution_Options: { code: 6174, category: ts.DiagnosticCategory.Message, key: "Module_Resolution_Options_6174", message: "Module Resolution Options" },
+        Source_Map_Options: { code: 6175, category: ts.DiagnosticCategory.Message, key: "Source_Map_Options_6175", message: "Source Map Options" },
+        Additional_Checks: { code: 6176, category: ts.DiagnosticCategory.Message, key: "Additional_Checks_6176", message: "Additional Checks" },
+        Experimental_Options: { code: 6177, category: ts.DiagnosticCategory.Message, key: "Experimental_Options_6177", message: "Experimental Options" },
+        Advanced_Options: { code: 6178, category: ts.DiagnosticCategory.Message, key: "Advanced_Options_6178", message: "Advanced Options" },
+        Provide_full_support_for_iterables_in_for_of_spread_and_destructuring_when_targeting_ES5_or_ES3: { code: 6179, category: ts.DiagnosticCategory.Message, key: "Provide_full_support_for_iterables_in_for_of_spread_and_destructuring_when_targeting_ES5_or_ES3_6179", message: "Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'." },
+        Enable_all_strict_type_checking_options: { code: 6180, category: ts.DiagnosticCategory.Message, key: "Enable_all_strict_type_checking_options_6180", message: "Enable all strict type-checking options." },
+        List_of_language_service_plugins: { code: 6181, category: ts.DiagnosticCategory.Message, key: "List_of_language_service_plugins_6181", message: "List of language service plugins." },
+        Scoped_package_detected_looking_in_0: { code: 6182, category: ts.DiagnosticCategory.Message, key: "Scoped_package_detected_looking_in_0_6182", message: "Scoped package detected, looking in '{0}'" },
+        Reusing_resolution_of_module_0_to_file_1_from_old_program: { code: 6183, category: ts.DiagnosticCategory.Message, key: "Reusing_resolution_of_module_0_to_file_1_from_old_program_6183", message: "Reusing resolution of module '{0}' to file '{1}' from old program." },
+        Reusing_module_resolutions_originating_in_0_since_resolutions_are_unchanged_from_old_program: { code: 6184, category: ts.DiagnosticCategory.Message, key: "Reusing_module_resolutions_originating_in_0_since_resolutions_are_unchanged_from_old_program_6184", message: "Reusing module resolutions originating in '{0}' since resolutions are unchanged from old program." },
+        Disable_strict_checking_of_generic_signatures_in_function_types: { code: 6185, category: ts.DiagnosticCategory.Message, key: "Disable_strict_checking_of_generic_signatures_in_function_types_6185", message: "Disable strict checking of generic signatures in function types." },
         Variable_0_implicitly_has_an_1_type: { code: 7005, category: ts.DiagnosticCategory.Error, key: "Variable_0_implicitly_has_an_1_type_7005", message: "Variable '{0}' implicitly has an '{1}' type." },
         Parameter_0_implicitly_has_an_1_type: { code: 7006, category: ts.DiagnosticCategory.Error, key: "Parameter_0_implicitly_has_an_1_type_7006", message: "Parameter '{0}' implicitly has an '{1}' type." },
         Member_0_implicitly_has_an_1_type: { code: 7008, category: ts.DiagnosticCategory.Error, key: "Member_0_implicitly_has_an_1_type_7008", message: "Member '{0}' implicitly has an '{1}' type." },
@@ -8358,7 +9941,8 @@ var ts;
         Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type: { code: 7011, category: ts.DiagnosticCategory.Error, key: "Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type_7011", message: "Function expression, which lacks return-type annotation, implicitly has an '{0}' return type." },
         Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type: { code: 7013, category: ts.DiagnosticCategory.Error, key: "Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type_7013", message: "Construct signature, which lacks return-type annotation, implicitly has an 'any' return type." },
         Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number: { code: 7015, category: ts.DiagnosticCategory.Error, key: "Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number_7015", message: "Element implicitly has an 'any' type because index expression is not of type 'number'." },
-        Index_signature_of_object_type_implicitly_has_an_any_type: { code: 7017, category: ts.DiagnosticCategory.Error, key: "Index_signature_of_object_type_implicitly_has_an_any_type_7017", message: "Index signature of object type implicitly has an 'any' type." },
+        Could_not_find_a_declaration_file_for_module_0_1_implicitly_has_an_any_type: { code: 7016, category: ts.DiagnosticCategory.Error, key: "Could_not_find_a_declaration_file_for_module_0_1_implicitly_has_an_any_type_7016", message: "Could not find a declaration file for module '{0}'. '{1}' implicitly has an 'any' type." },
+        Element_implicitly_has_an_any_type_because_type_0_has_no_index_signature: { code: 7017, category: ts.DiagnosticCategory.Error, key: "Element_implicitly_has_an_any_type_because_type_0_has_no_index_signature_7017", message: "Element implicitly has an 'any' type because type '{0}' has no index signature." },
         Object_literal_s_property_0_implicitly_has_an_1_type: { code: 7018, category: ts.DiagnosticCategory.Error, key: "Object_literal_s_property_0_implicitly_has_an_1_type_7018", message: "Object literal's property '{0}' implicitly has an '{1}' type." },
         Rest_parameter_0_implicitly_has_an_any_type: { code: 7019, category: ts.DiagnosticCategory.Error, key: "Rest_parameter_0_implicitly_has_an_any_type_7019", message: "Rest parameter '{0}' implicitly has an 'any[]' type." },
         Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type: { code: 7020, category: ts.DiagnosticCategory.Error, key: "Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type_7020", message: "Call signature, which lacks return-type annotation, implicitly has an 'any' return type." },
@@ -8366,7 +9950,7 @@ var ts;
         _0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions: { code: 7023, category: ts.DiagnosticCategory.Error, key: "_0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_reference_7023", message: "'{0}' implicitly has return type 'any' because it does not have a return type annotation and is referenced directly or indirectly in one of its return expressions." },
         Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions: { code: 7024, category: ts.DiagnosticCategory.Error, key: "Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_ref_7024", message: "Function implicitly has return type 'any' because it does not have a return type annotation and is referenced directly or indirectly in one of its return expressions." },
         Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_type: { code: 7025, category: ts.DiagnosticCategory.Error, key: "Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_typ_7025", message: "Generator implicitly has type '{0}' because it does not yield any values. Consider supplying a return type." },
-        JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists: { code: 7026, category: ts.DiagnosticCategory.Error, key: "JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists_7026", message: "JSX element implicitly has type 'any' because no interface 'JSX.{0}' exists" },
+        JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists: { code: 7026, category: ts.DiagnosticCategory.Error, key: "JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists_7026", message: "JSX element implicitly has type 'any' because no interface 'JSX.{0}' exists." },
         Unreachable_code_detected: { code: 7027, category: ts.DiagnosticCategory.Error, key: "Unreachable_code_detected_7027", message: "Unreachable code detected." },
         Unused_label: { code: 7028, category: ts.DiagnosticCategory.Error, key: "Unused_label_7028", message: "Unused label." },
         Fallthrough_case_in_switch: { code: 7029, category: ts.DiagnosticCategory.Error, key: "Fallthrough_case_in_switch_7029", message: "Fallthrough case in switch." },
@@ -8374,6 +9958,9 @@ var ts;
         Binding_element_0_implicitly_has_an_1_type: { code: 7031, category: ts.DiagnosticCategory.Error, key: "Binding_element_0_implicitly_has_an_1_type_7031", message: "Binding element '{0}' implicitly has an '{1}' type." },
         Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_parameter_type_annotation: { code: 7032, category: ts.DiagnosticCategory.Error, key: "Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_parameter_type_annotation_7032", message: "Property '{0}' implicitly has type 'any', because its set accessor lacks a parameter type annotation." },
         Property_0_implicitly_has_type_any_because_its_get_accessor_lacks_a_return_type_annotation: { code: 7033, category: ts.DiagnosticCategory.Error, key: "Property_0_implicitly_has_type_any_because_its_get_accessor_lacks_a_return_type_annotation_7033", message: "Property '{0}' implicitly has type 'any', because its get accessor lacks a return type annotation." },
+        Variable_0_implicitly_has_type_1_in_some_locations_where_its_type_cannot_be_determined: { code: 7034, category: ts.DiagnosticCategory.Error, key: "Variable_0_implicitly_has_type_1_in_some_locations_where_its_type_cannot_be_determined_7034", message: "Variable '{0}' implicitly has type '{1}' in some locations where its type cannot be determined." },
+        Try_npm_install_types_Slash_0_if_it_exists_or_add_a_new_declaration_d_ts_file_containing_declare_module_0: { code: 7035, category: ts.DiagnosticCategory.Error, key: "Try_npm_install_types_Slash_0_if_it_exists_or_add_a_new_declaration_d_ts_file_containing_declare_mod_7035", message: "Try `npm install @types/{0}` if it exists or add a new declaration (.d.ts) file containing `declare module '{0}';`" },
+        Dynamic_import_s_specifier_must_be_of_type_string_but_here_has_type_0: { code: 7036, category: ts.DiagnosticCategory.Error, key: "Dynamic_import_s_specifier_must_be_of_type_string_but_here_has_type_0_7036", message: "Dynamic import's specifier must be of type 'string', but here has type '{0}'." },
         You_cannot_rename_this_element: { code: 8000, category: ts.DiagnosticCategory.Error, key: "You_cannot_rename_this_element_8000", message: "You cannot rename this element." },
         You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library: { code: 8001, category: ts.DiagnosticCategory.Error, key: "You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library_8001", message: "You cannot rename elements that are defined in the standard TypeScript library." },
         import_can_only_be_used_in_a_ts_file: { code: 8002, category: ts.DiagnosticCategory.Error, key: "import_can_only_be_used_in_a_ts_file_8002", message: "'import ... =' can only be used in a .ts file." },
@@ -8389,36362 +9976,43589 @@ var ts;
         parameter_modifiers_can_only_be_used_in_a_ts_file: { code: 8012, category: ts.DiagnosticCategory.Error, key: "parameter_modifiers_can_only_be_used_in_a_ts_file_8012", message: "'parameter modifiers' can only be used in a .ts file." },
         enum_declarations_can_only_be_used_in_a_ts_file: { code: 8015, category: ts.DiagnosticCategory.Error, key: "enum_declarations_can_only_be_used_in_a_ts_file_8015", message: "'enum declarations' can only be used in a .ts file." },
         type_assertion_expressions_can_only_be_used_in_a_ts_file: { code: 8016, category: ts.DiagnosticCategory.Error, key: "type_assertion_expressions_can_only_be_used_in_a_ts_file_8016", message: "'type assertion expressions' can only be used in a .ts file." },
-        Only_identifiers_Slashqualified_names_with_optional_type_arguments_are_currently_supported_in_a_class_extends_clauses: { code: 9002, category: ts.DiagnosticCategory.Error, key: "Only_identifiers_Slashqualified_names_with_optional_type_arguments_are_currently_supported_in_a_clas_9002", message: "Only identifiers/qualified-names with optional type arguments are currently supported in a class 'extends' clauses." },
+        Only_identifiers_Slashqualified_names_with_optional_type_arguments_are_currently_supported_in_a_class_extends_clause: { code: 9002, category: ts.DiagnosticCategory.Error, key: "Only_identifiers_Slashqualified_names_with_optional_type_arguments_are_currently_supported_in_a_clas_9002", message: "Only identifiers/qualified-names with optional type arguments are currently supported in a class 'extends' clause." },
         class_expressions_are_not_currently_supported: { code: 9003, category: ts.DiagnosticCategory.Error, key: "class_expressions_are_not_currently_supported_9003", message: "'class' expressions are not currently supported." },
+        Language_service_is_disabled: { code: 9004, category: ts.DiagnosticCategory.Error, key: "Language_service_is_disabled_9004", message: "Language service is disabled." },
         JSX_attributes_must_only_be_assigned_a_non_empty_expression: { code: 17000, category: ts.DiagnosticCategory.Error, key: "JSX_attributes_must_only_be_assigned_a_non_empty_expression_17000", message: "JSX attributes must only be assigned a non-empty 'expression'." },
         JSX_elements_cannot_have_multiple_attributes_with_the_same_name: { code: 17001, category: ts.DiagnosticCategory.Error, key: "JSX_elements_cannot_have_multiple_attributes_with_the_same_name_17001", message: "JSX elements cannot have multiple attributes with the same name." },
         Expected_corresponding_JSX_closing_tag_for_0: { code: 17002, category: ts.DiagnosticCategory.Error, key: "Expected_corresponding_JSX_closing_tag_for_0_17002", message: "Expected corresponding JSX closing tag for '{0}'." },
         JSX_attribute_expected: { code: 17003, category: ts.DiagnosticCategory.Error, key: "JSX_attribute_expected_17003", message: "JSX attribute expected." },
         Cannot_use_JSX_unless_the_jsx_flag_is_provided: { code: 17004, category: ts.DiagnosticCategory.Error, key: "Cannot_use_JSX_unless_the_jsx_flag_is_provided_17004", message: "Cannot use JSX unless the '--jsx' flag is provided." },
-        A_constructor_cannot_contain_a_super_call_when_its_class_extends_null: { code: 17005, category: ts.DiagnosticCategory.Error, key: "A_constructor_cannot_contain_a_super_call_when_its_class_extends_null_17005", message: "A constructor cannot contain a 'super' call when its class extends 'null'" },
+        A_constructor_cannot_contain_a_super_call_when_its_class_extends_null: { code: 17005, category: ts.DiagnosticCategory.Error, key: "A_constructor_cannot_contain_a_super_call_when_its_class_extends_null_17005", message: "A constructor cannot contain a 'super' call when its class extends 'null'." },
         An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses: { code: 17006, category: ts.DiagnosticCategory.Error, key: "An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_ex_17006", message: "An unary expression with the '{0}' operator is not allowed in the left-hand side of an exponentiation expression. Consider enclosing the expression in parentheses." },
         A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses: { code: 17007, category: ts.DiagnosticCategory.Error, key: "A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Con_17007", message: "A type assertion expression is not allowed in the left-hand side of an exponentiation expression. Consider enclosing the expression in parentheses." },
         JSX_element_0_has_no_corresponding_closing_tag: { code: 17008, category: ts.DiagnosticCategory.Error, key: "JSX_element_0_has_no_corresponding_closing_tag_17008", message: "JSX element '{0}' has no corresponding closing tag." },
         super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class: { code: 17009, category: ts.DiagnosticCategory.Error, key: "super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class_17009", message: "'super' must be called before accessing 'this' in the constructor of a derived class." },
-        Unknown_typing_option_0: { code: 17010, category: ts.DiagnosticCategory.Error, key: "Unknown_typing_option_0_17010", message: "Unknown typing option '{0}'." },
+        Unknown_type_acquisition_option_0: { code: 17010, category: ts.DiagnosticCategory.Error, key: "Unknown_type_acquisition_option_0_17010", message: "Unknown type acquisition option '{0}'." },
+        super_must_be_called_before_accessing_a_property_of_super_in_the_constructor_of_a_derived_class: { code: 17011, category: ts.DiagnosticCategory.Error, key: "super_must_be_called_before_accessing_a_property_of_super_in_the_constructor_of_a_derived_class_17011", message: "'super' must be called before accessing a property of 'super' in the constructor of a derived class." },
+        _0_is_not_a_valid_meta_property_for_keyword_1_Did_you_mean_2: { code: 17012, category: ts.DiagnosticCategory.Error, key: "_0_is_not_a_valid_meta_property_for_keyword_1_Did_you_mean_2_17012", message: "'{0}' is not a valid meta-property for keyword '{1}'. Did you mean '{2}'?" },
+        Meta_property_0_is_only_allowed_in_the_body_of_a_function_declaration_function_expression_or_constructor: { code: 17013, category: ts.DiagnosticCategory.Error, key: "Meta_property_0_is_only_allowed_in_the_body_of_a_function_declaration_function_expression_or_constru_17013", message: "Meta-property '{0}' is only allowed in the body of a function declaration, function expression, or constructor." },
         Circularity_detected_while_resolving_configuration_Colon_0: { code: 18000, category: ts.DiagnosticCategory.Error, key: "Circularity_detected_while_resolving_configuration_Colon_0_18000", message: "Circularity detected while resolving configuration: {0}" },
-        The_path_in_an_extends_options_must_be_relative_or_rooted: { code: 18001, category: ts.DiagnosticCategory.Error, key: "The_path_in_an_extends_options_must_be_relative_or_rooted_18001", message: "The path in an 'extends' options must be relative or rooted." },
+        A_path_in_an_extends_option_must_be_relative_or_rooted_but_0_is_not: { code: 18001, category: ts.DiagnosticCategory.Error, key: "A_path_in_an_extends_option_must_be_relative_or_rooted_but_0_is_not_18001", message: "A path in an 'extends' option must be relative or rooted, but '{0}' is not." },
+        The_files_list_in_config_file_0_is_empty: { code: 18002, category: ts.DiagnosticCategory.Error, key: "The_files_list_in_config_file_0_is_empty_18002", message: "The 'files' list in config file '{0}' is empty." },
+        No_inputs_were_found_in_config_file_0_Specified_include_paths_were_1_and_exclude_paths_were_2: { code: 18003, category: ts.DiagnosticCategory.Error, key: "No_inputs_were_found_in_config_file_0_Specified_include_paths_were_1_and_exclude_paths_were_2_18003", message: "No inputs were found in config file '{0}'. Specified 'include' paths were '{1}' and 'exclude' paths were '{2}'." },
+        Add_missing_super_call: { code: 90001, category: ts.DiagnosticCategory.Message, key: "Add_missing_super_call_90001", message: "Add missing 'super()' call." },
+        Make_super_call_the_first_statement_in_the_constructor: { code: 90002, category: ts.DiagnosticCategory.Message, key: "Make_super_call_the_first_statement_in_the_constructor_90002", message: "Make 'super()' call the first statement in the constructor." },
+        Change_extends_to_implements: { code: 90003, category: ts.DiagnosticCategory.Message, key: "Change_extends_to_implements_90003", message: "Change 'extends' to 'implements'." },
+        Remove_declaration_for_Colon_0: { code: 90004, category: ts.DiagnosticCategory.Message, key: "Remove_declaration_for_Colon_0_90004", message: "Remove declaration for: '{0}'." },
+        Implement_interface_0: { code: 90006, category: ts.DiagnosticCategory.Message, key: "Implement_interface_0_90006", message: "Implement interface '{0}'." },
+        Implement_inherited_abstract_class: { code: 90007, category: ts.DiagnosticCategory.Message, key: "Implement_inherited_abstract_class_90007", message: "Implement inherited abstract class." },
+        Add_this_to_unresolved_variable: { code: 90008, category: ts.DiagnosticCategory.Message, key: "Add_this_to_unresolved_variable_90008", message: "Add 'this.' to unresolved variable." },
+        Adding_a_tsconfig_json_file_will_help_organize_projects_that_contain_both_TypeScript_and_JavaScript_files_Learn_more_at_https_Colon_Slash_Slashaka_ms_Slashtsconfig: { code: 90009, category: ts.DiagnosticCategory.Error, key: "Adding_a_tsconfig_json_file_will_help_organize_projects_that_contain_both_TypeScript_and_JavaScript__90009", message: "Adding a tsconfig.json file will help organize projects that contain both TypeScript and JavaScript files. Learn more at https://aka.ms/tsconfig." },
+        Type_0_is_not_assignable_to_type_1_Two_different_types_with_this_name_exist_but_they_are_unrelated: { code: 90010, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_assignable_to_type_1_Two_different_types_with_this_name_exist_but_they_are_unrelated_90010", message: "Type '{0}' is not assignable to type '{1}'. Two different types with this name exist, but they are unrelated." },
+        Import_0_from_1: { code: 90013, category: ts.DiagnosticCategory.Message, key: "Import_0_from_1_90013", message: "Import {0} from {1}." },
+        Change_0_to_1: { code: 90014, category: ts.DiagnosticCategory.Message, key: "Change_0_to_1_90014", message: "Change {0} to {1}." },
+        Add_0_to_existing_import_declaration_from_1: { code: 90015, category: ts.DiagnosticCategory.Message, key: "Add_0_to_existing_import_declaration_from_1_90015", message: "Add {0} to existing import declaration from {1}." },
+        Declare_property_0: { code: 90016, category: ts.DiagnosticCategory.Message, key: "Declare_property_0_90016", message: "Declare property '{0}'." },
+        Add_index_signature_for_property_0: { code: 90017, category: ts.DiagnosticCategory.Message, key: "Add_index_signature_for_property_0_90017", message: "Add index signature for property '{0}'." },
+        Disable_checking_for_this_file: { code: 90018, category: ts.DiagnosticCategory.Message, key: "Disable_checking_for_this_file_90018", message: "Disable checking for this file." },
+        Ignore_this_error_message: { code: 90019, category: ts.DiagnosticCategory.Message, key: "Ignore_this_error_message_90019", message: "Ignore this error message." },
+        Initialize_property_0_in_the_constructor: { code: 90020, category: ts.DiagnosticCategory.Message, key: "Initialize_property_0_in_the_constructor_90020", message: "Initialize property '{0}' in the constructor." },
+        Initialize_static_property_0: { code: 90021, category: ts.DiagnosticCategory.Message, key: "Initialize_static_property_0_90021", message: "Initialize static property '{0}'." },
+        Change_spelling_to_0: { code: 90022, category: ts.DiagnosticCategory.Message, key: "Change_spelling_to_0_90022", message: "Change spelling to '{0}'." },
+        Declare_method_0: { code: 90023, category: ts.DiagnosticCategory.Message, key: "Declare_method_0_90023", message: "Declare method '{0}'." },
+        Declare_static_method_0: { code: 90024, category: ts.DiagnosticCategory.Message, key: "Declare_static_method_0_90024", message: "Declare static method '{0}'." },
+        Prefix_0_with_an_underscore: { code: 90025, category: ts.DiagnosticCategory.Message, key: "Prefix_0_with_an_underscore_90025", message: "Prefix '{0}' with an underscore." },
+        Convert_function_to_an_ES2015_class: { code: 95001, category: ts.DiagnosticCategory.Message, key: "Convert_function_to_an_ES2015_class_95001", message: "Convert function to an ES2015 class" },
+        Convert_function_0_to_class: { code: 95002, category: ts.DiagnosticCategory.Message, key: "Convert_function_0_to_class_95002", message: "Convert function '{0}' to class" },
+        Octal_literal_types_must_use_ES2015_syntax_Use_the_syntax_0: { code: 8017, category: ts.DiagnosticCategory.Error, key: "Octal_literal_types_must_use_ES2015_syntax_Use_the_syntax_0_8017", message: "Octal literal types must use ES2015 syntax. Use the syntax '{0}'." },
+        Octal_literals_are_not_allowed_in_enums_members_initializer_Use_the_syntax_0: { code: 8018, category: ts.DiagnosticCategory.Error, key: "Octal_literals_are_not_allowed_in_enums_members_initializer_Use_the_syntax_0_8018", message: "Octal literals are not allowed in enums members initializer. Use the syntax '{0}'." },
+        Report_errors_in_js_files: { code: 8019, category: ts.DiagnosticCategory.Message, key: "Report_errors_in_js_files_8019", message: "Report errors in .js files." },
     };
 })(ts || (ts = {}));
-/// <reference path="core.ts"/>
-/// <reference path="diagnosticInformationMap.generated.ts"/>
+/// <reference path="core.ts"/>
+/// <reference path="diagnosticInformationMap.generated.ts"/>
+var ts;
+(function (ts) {
+    /* @internal */
+    function tokenIsIdentifierOrKeyword(token) {
+        return token >= 71 /* Identifier */;
+    }
+    ts.tokenIsIdentifierOrKeyword = tokenIsIdentifierOrKeyword;
+    var textToToken = ts.createMapFromTemplate({
+        "abstract": 117 /* AbstractKeyword */,
+        "any": 119 /* AnyKeyword */,
+        "as": 118 /* AsKeyword */,
+        "boolean": 122 /* BooleanKeyword */,
+        "break": 72 /* BreakKeyword */,
+        "case": 73 /* CaseKeyword */,
+        "catch": 74 /* CatchKeyword */,
+        "class": 75 /* ClassKeyword */,
+        "continue": 77 /* ContinueKeyword */,
+        "const": 76 /* ConstKeyword */,
+        "constructor": 123 /* ConstructorKeyword */,
+        "debugger": 78 /* DebuggerKeyword */,
+        "declare": 124 /* DeclareKeyword */,
+        "default": 79 /* DefaultKeyword */,
+        "delete": 80 /* DeleteKeyword */,
+        "do": 81 /* DoKeyword */,
+        "else": 82 /* ElseKeyword */,
+        "enum": 83 /* EnumKeyword */,
+        "export": 84 /* ExportKeyword */,
+        "extends": 85 /* ExtendsKeyword */,
+        "false": 86 /* FalseKeyword */,
+        "finally": 87 /* FinallyKeyword */,
+        "for": 88 /* ForKeyword */,
+        "from": 140 /* FromKeyword */,
+        "function": 89 /* FunctionKeyword */,
+        "get": 125 /* GetKeyword */,
+        "if": 90 /* IfKeyword */,
+        "implements": 108 /* ImplementsKeyword */,
+        "import": 91 /* ImportKeyword */,
+        "in": 92 /* InKeyword */,
+        "instanceof": 93 /* InstanceOfKeyword */,
+        "interface": 109 /* InterfaceKeyword */,
+        "is": 126 /* IsKeyword */,
+        "keyof": 127 /* KeyOfKeyword */,
+        "let": 110 /* LetKeyword */,
+        "module": 128 /* ModuleKeyword */,
+        "namespace": 129 /* NamespaceKeyword */,
+        "never": 130 /* NeverKeyword */,
+        "new": 94 /* NewKeyword */,
+        "null": 95 /* NullKeyword */,
+        "number": 133 /* NumberKeyword */,
+        "object": 134 /* ObjectKeyword */,
+        "package": 111 /* PackageKeyword */,
+        "private": 112 /* PrivateKeyword */,
+        "protected": 113 /* ProtectedKeyword */,
+        "public": 114 /* PublicKeyword */,
+        "readonly": 131 /* ReadonlyKeyword */,
+        "require": 132 /* RequireKeyword */,
+        "global": 141 /* GlobalKeyword */,
+        "return": 96 /* ReturnKeyword */,
+        "set": 135 /* SetKeyword */,
+        "static": 115 /* StaticKeyword */,
+        "string": 136 /* StringKeyword */,
+        "super": 97 /* SuperKeyword */,
+        "switch": 98 /* SwitchKeyword */,
+        "symbol": 137 /* SymbolKeyword */,
+        "this": 99 /* ThisKeyword */,
+        "throw": 100 /* ThrowKeyword */,
+        "true": 101 /* TrueKeyword */,
+        "try": 102 /* TryKeyword */,
+        "type": 138 /* TypeKeyword */,
+        "typeof": 103 /* TypeOfKeyword */,
+        "undefined": 139 /* UndefinedKeyword */,
+        "var": 104 /* VarKeyword */,
+        "void": 105 /* VoidKeyword */,
+        "while": 106 /* WhileKeyword */,
+        "with": 107 /* WithKeyword */,
+        "yield": 116 /* YieldKeyword */,
+        "async": 120 /* AsyncKeyword */,
+        "await": 121 /* AwaitKeyword */,
+        "of": 142 /* OfKeyword */,
+        "{": 17 /* OpenBraceToken */,
+        "}": 18 /* CloseBraceToken */,
+        "(": 19 /* OpenParenToken */,
+        ")": 20 /* CloseParenToken */,
+        "[": 21 /* OpenBracketToken */,
+        "]": 22 /* CloseBracketToken */,
+        ".": 23 /* DotToken */,
+        "...": 24 /* DotDotDotToken */,
+        ";": 25 /* SemicolonToken */,
+        ",": 26 /* CommaToken */,
+        "<": 27 /* LessThanToken */,
+        ">": 29 /* GreaterThanToken */,
+        "<=": 30 /* LessThanEqualsToken */,
+        ">=": 31 /* GreaterThanEqualsToken */,
+        "==": 32 /* EqualsEqualsToken */,
+        "!=": 33 /* ExclamationEqualsToken */,
+        "===": 34 /* EqualsEqualsEqualsToken */,
+        "!==": 35 /* ExclamationEqualsEqualsToken */,
+        "=>": 36 /* EqualsGreaterThanToken */,
+        "+": 37 /* PlusToken */,
+        "-": 38 /* MinusToken */,
+        "**": 40 /* AsteriskAsteriskToken */,
+        "*": 39 /* AsteriskToken */,
+        "/": 41 /* SlashToken */,
+        "%": 42 /* PercentToken */,
+        "++": 43 /* PlusPlusToken */,
+        "--": 44 /* MinusMinusToken */,
+        "<<": 45 /* LessThanLessThanToken */,
+        "</": 28 /* LessThanSlashToken */,
+        ">>": 46 /* GreaterThanGreaterThanToken */,
+        ">>>": 47 /* GreaterThanGreaterThanGreaterThanToken */,
+        "&": 48 /* AmpersandToken */,
+        "|": 49 /* BarToken */,
+        "^": 50 /* CaretToken */,
+        "!": 51 /* ExclamationToken */,
+        "~": 52 /* TildeToken */,
+        "&&": 53 /* AmpersandAmpersandToken */,
+        "||": 54 /* BarBarToken */,
+        "?": 55 /* QuestionToken */,
+        ":": 56 /* ColonToken */,
+        "=": 58 /* EqualsToken */,
+        "+=": 59 /* PlusEqualsToken */,
+        "-=": 60 /* MinusEqualsToken */,
+        "*=": 61 /* AsteriskEqualsToken */,
+        "**=": 62 /* AsteriskAsteriskEqualsToken */,
+        "/=": 63 /* SlashEqualsToken */,
+        "%=": 64 /* PercentEqualsToken */,
+        "<<=": 65 /* LessThanLessThanEqualsToken */,
+        ">>=": 66 /* GreaterThanGreaterThanEqualsToken */,
+        ">>>=": 67 /* GreaterThanGreaterThanGreaterThanEqualsToken */,
+        "&=": 68 /* AmpersandEqualsToken */,
+        "|=": 69 /* BarEqualsToken */,
+        "^=": 70 /* CaretEqualsToken */,
+        "@": 57 /* AtToken */,
+    });
+    /*
+        As per ECMAScript Language Specification 3th Edition, Section 7.6: Identifiers
+        IdentifierStart ::
+            Can contain Unicode 3.0.0  categories:
+            Uppercase letter (Lu),
+            Lowercase letter (Ll),
+            Titlecase letter (Lt),
+            Modifier letter (Lm),
+            Other letter (Lo), or
+            Letter number (Nl).
+        IdentifierPart :: =
+            Can contain IdentifierStart + Unicode 3.0.0  categories:
+            Non-spacing mark (Mn),
+            Combining spacing mark (Mc),
+            Decimal number (Nd), or
+            Connector punctuation (Pc).
+
+        Codepoint ranges for ES3 Identifiers are extracted from the Unicode 3.0.0 specification at:
+        http://www.unicode.org/Public/3.0-Update/UnicodeData-3.0.0.txt
+    */
+    var unicodeES3IdentifierStart = [170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 543, 546, 563, 592, 685, 688, 696, 699, 705, 720, 721, 736, 740, 750, 750, 890, 890, 902, 902, 904, 906, 908, 908, 910, 929, 931, 974, 976, 983, 986, 1011, 1024, 1153, 1164, 1220, 1223, 1224, 1227, 1228, 1232, 1269, 1272, 1273, 1329, 1366, 1369, 1369, 1377, 1415, 1488, 1514, 1520, 1522, 1569, 1594, 1600, 1610, 1649, 1747, 1749, 1749, 1765, 1766, 1786, 1788, 1808, 1808, 1810, 1836, 1920, 1957, 2309, 2361, 2365, 2365, 2384, 2384, 2392, 2401, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482, 2482, 2486, 2489, 2524, 2525, 2527, 2529, 2544, 2545, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613, 2614, 2616, 2617, 2649, 2652, 2654, 2654, 2674, 2676, 2693, 2699, 2701, 2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2749, 2749, 2768, 2768, 2784, 2784, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2870, 2873, 2877, 2877, 2908, 2909, 2911, 2913, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986, 2990, 2997, 2999, 3001, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3123, 3125, 3129, 3168, 3169, 3205, 3212, 3214, 3216, 3218, 3240, 3242, 3251, 3253, 3257, 3294, 3294, 3296, 3297, 3333, 3340, 3342, 3344, 3346, 3368, 3370, 3385, 3424, 3425, 3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3585, 3632, 3634, 3635, 3648, 3654, 3713, 3714, 3716, 3716, 3719, 3720, 3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757, 3760, 3762, 3763, 3773, 3773, 3776, 3780, 3782, 3782, 3804, 3805, 3840, 3840, 3904, 3911, 3913, 3946, 3976, 3979, 4096, 4129, 4131, 4135, 4137, 4138, 4176, 4181, 4256, 4293, 4304, 4342, 4352, 4441, 4447, 4514, 4520, 4601, 4608, 4614, 4616, 4678, 4680, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4742, 4744, 4744, 4746, 4749, 4752, 4782, 4784, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4814, 4816, 4822, 4824, 4846, 4848, 4878, 4880, 4880, 4882, 4885, 4888, 4894, 4896, 4934, 4936, 4954, 5024, 5108, 5121, 5740, 5743, 5750, 5761, 5786, 5792, 5866, 6016, 6067, 6176, 6263, 6272, 6312, 7680, 7835, 7840, 7929, 7936, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8319, 8319, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8473, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8497, 8499, 8505, 8544, 8579, 12293, 12295, 12321, 12329, 12337, 12341, 12344, 12346, 12353, 12436, 12445, 12446, 12449, 12538, 12540, 12542, 12549, 12588, 12593, 12686, 12704, 12727, 13312, 19893, 19968, 40869, 40960, 42124, 44032, 55203, 63744, 64045, 64256, 64262, 64275, 64279, 64285, 64285, 64287, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65136, 65138, 65140, 65140, 65142, 65276, 65313, 65338, 65345, 65370, 65382, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500,];
+    var unicodeES3IdentifierPart = [170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 543, 546, 563, 592, 685, 688, 696, 699, 705, 720, 721, 736, 740, 750, 750, 768, 846, 864, 866, 890, 890, 902, 902, 904, 906, 908, 908, 910, 929, 931, 974, 976, 983, 986, 1011, 1024, 1153, 1155, 1158, 1164, 1220, 1223, 1224, 1227, 1228, 1232, 1269, 1272, 1273, 1329, 1366, 1369, 1369, 1377, 1415, 1425, 1441, 1443, 1465, 1467, 1469, 1471, 1471, 1473, 1474, 1476, 1476, 1488, 1514, 1520, 1522, 1569, 1594, 1600, 1621, 1632, 1641, 1648, 1747, 1749, 1756, 1759, 1768, 1770, 1773, 1776, 1788, 1808, 1836, 1840, 1866, 1920, 1968, 2305, 2307, 2309, 2361, 2364, 2381, 2384, 2388, 2392, 2403, 2406, 2415, 2433, 2435, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482, 2482, 2486, 2489, 2492, 2492, 2494, 2500, 2503, 2504, 2507, 2509, 2519, 2519, 2524, 2525, 2527, 2531, 2534, 2545, 2562, 2562, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613, 2614, 2616, 2617, 2620, 2620, 2622, 2626, 2631, 2632, 2635, 2637, 2649, 2652, 2654, 2654, 2662, 2676, 2689, 2691, 2693, 2699, 2701, 2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2748, 2757, 2759, 2761, 2763, 2765, 2768, 2768, 2784, 2784, 2790, 2799, 2817, 2819, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2870, 2873, 2876, 2883, 2887, 2888, 2891, 2893, 2902, 2903, 2908, 2909, 2911, 2913, 2918, 2927, 2946, 2947, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986, 2990, 2997, 2999, 3001, 3006, 3010, 3014, 3016, 3018, 3021, 3031, 3031, 3047, 3055, 3073, 3075, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3123, 3125, 3129, 3134, 3140, 3142, 3144, 3146, 3149, 3157, 3158, 3168, 3169, 3174, 3183, 3202, 3203, 3205, 3212, 3214, 3216, 3218, 3240, 3242, 3251, 3253, 3257, 3262, 3268, 3270, 3272, 3274, 3277, 3285, 3286, 3294, 3294, 3296, 3297, 3302, 3311, 3330, 3331, 3333, 3340, 3342, 3344, 3346, 3368, 3370, 3385, 3390, 3395, 3398, 3400, 3402, 3405, 3415, 3415, 3424, 3425, 3430, 3439, 3458, 3459, 3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3530, 3530, 3535, 3540, 3542, 3542, 3544, 3551, 3570, 3571, 3585, 3642, 3648, 3662, 3664, 3673, 3713, 3714, 3716, 3716, 3719, 3720, 3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757, 3769, 3771, 3773, 3776, 3780, 3782, 3782, 3784, 3789, 3792, 3801, 3804, 3805, 3840, 3840, 3864, 3865, 3872, 3881, 3893, 3893, 3895, 3895, 3897, 3897, 3902, 3911, 3913, 3946, 3953, 3972, 3974, 3979, 3984, 3991, 3993, 4028, 4038, 4038, 4096, 4129, 4131, 4135, 4137, 4138, 4140, 4146, 4150, 4153, 4160, 4169, 4176, 4185, 4256, 4293, 4304, 4342, 4352, 4441, 4447, 4514, 4520, 4601, 4608, 4614, 4616, 4678, 4680, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4742, 4744, 4744, 4746, 4749, 4752, 4782, 4784, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4814, 4816, 4822, 4824, 4846, 4848, 4878, 4880, 4880, 4882, 4885, 4888, 4894, 4896, 4934, 4936, 4954, 4969, 4977, 5024, 5108, 5121, 5740, 5743, 5750, 5761, 5786, 5792, 5866, 6016, 6099, 6112, 6121, 6160, 6169, 6176, 6263, 6272, 6313, 7680, 7835, 7840, 7929, 7936, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8255, 8256, 8319, 8319, 8400, 8412, 8417, 8417, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8473, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8497, 8499, 8505, 8544, 8579, 12293, 12295, 12321, 12335, 12337, 12341, 12344, 12346, 12353, 12436, 12441, 12442, 12445, 12446, 12449, 12542, 12549, 12588, 12593, 12686, 12704, 12727, 13312, 19893, 19968, 40869, 40960, 42124, 44032, 55203, 63744, 64045, 64256, 64262, 64275, 64279, 64285, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65056, 65059, 65075, 65076, 65101, 65103, 65136, 65138, 65140, 65140, 65142, 65276, 65296, 65305, 65313, 65338, 65343, 65343, 65345, 65370, 65381, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500,];
+    /*
+        As per ECMAScript Language Specification 5th Edition, Section 7.6: ISyntaxToken Names and Identifiers
+        IdentifierStart ::
+            Can contain Unicode 6.2  categories:
+            Uppercase letter (Lu),
+            Lowercase letter (Ll),
+            Titlecase letter (Lt),
+            Modifier letter (Lm),
+            Other letter (Lo), or
+            Letter number (Nl).
+        IdentifierPart ::
+            Can contain IdentifierStart + Unicode 6.2  categories:
+            Non-spacing mark (Mn),
+            Combining spacing mark (Mc),
+            Decimal number (Nd),
+            Connector punctuation (Pc),
+            <ZWNJ>, or
+            <ZWJ>.
+
+        Codepoint ranges for ES5 Identifiers are extracted from the Unicode 6.2 specification at:
+        http://www.unicode.org/Public/6.2.0/ucd/UnicodeData.txt
+    */
+    var unicodeES5IdentifierStart = [170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 705, 710, 721, 736, 740, 748, 748, 750, 750, 880, 884, 886, 887, 890, 893, 902, 902, 904, 906, 908, 908, 910, 929, 931, 1013, 1015, 1153, 1162, 1319, 1329, 1366, 1369, 1369, 1377, 1415, 1488, 1514, 1520, 1522, 1568, 1610, 1646, 1647, 1649, 1747, 1749, 1749, 1765, 1766, 1774, 1775, 1786, 1788, 1791, 1791, 1808, 1808, 1810, 1839, 1869, 1957, 1969, 1969, 1994, 2026, 2036, 2037, 2042, 2042, 2048, 2069, 2074, 2074, 2084, 2084, 2088, 2088, 2112, 2136, 2208, 2208, 2210, 2220, 2308, 2361, 2365, 2365, 2384, 2384, 2392, 2401, 2417, 2423, 2425, 2431, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482, 2482, 2486, 2489, 2493, 2493, 2510, 2510, 2524, 2525, 2527, 2529, 2544, 2545, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613, 2614, 2616, 2617, 2649, 2652, 2654, 2654, 2674, 2676, 2693, 2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2749, 2749, 2768, 2768, 2784, 2785, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2869, 2873, 2877, 2877, 2908, 2909, 2911, 2913, 2929, 2929, 2947, 2947, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986, 2990, 3001, 3024, 3024, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3123, 3125, 3129, 3133, 3133, 3160, 3161, 3168, 3169, 3205, 3212, 3214, 3216, 3218, 3240, 3242, 3251, 3253, 3257, 3261, 3261, 3294, 3294, 3296, 3297, 3313, 3314, 3333, 3340, 3342, 3344, 3346, 3386, 3389, 3389, 3406, 3406, 3424, 3425, 3450, 3455, 3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3585, 3632, 3634, 3635, 3648, 3654, 3713, 3714, 3716, 3716, 3719, 3720, 3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757, 3760, 3762, 3763, 3773, 3773, 3776, 3780, 3782, 3782, 3804, 3807, 3840, 3840, 3904, 3911, 3913, 3948, 3976, 3980, 4096, 4138, 4159, 4159, 4176, 4181, 4186, 4189, 4193, 4193, 4197, 4198, 4206, 4208, 4213, 4225, 4238, 4238, 4256, 4293, 4295, 4295, 4301, 4301, 4304, 4346, 4348, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4744, 4746, 4749, 4752, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4822, 4824, 4880, 4882, 4885, 4888, 4954, 4992, 5007, 5024, 5108, 5121, 5740, 5743, 5759, 5761, 5786, 5792, 5866, 5870, 5872, 5888, 5900, 5902, 5905, 5920, 5937, 5952, 5969, 5984, 5996, 5998, 6000, 6016, 6067, 6103, 6103, 6108, 6108, 6176, 6263, 6272, 6312, 6314, 6314, 6320, 6389, 6400, 6428, 6480, 6509, 6512, 6516, 6528, 6571, 6593, 6599, 6656, 6678, 6688, 6740, 6823, 6823, 6917, 6963, 6981, 6987, 7043, 7072, 7086, 7087, 7098, 7141, 7168, 7203, 7245, 7247, 7258, 7293, 7401, 7404, 7406, 7409, 7413, 7414, 7424, 7615, 7680, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8305, 8305, 8319, 8319, 8336, 8348, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8473, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8505, 8508, 8511, 8517, 8521, 8526, 8526, 8544, 8584, 11264, 11310, 11312, 11358, 11360, 11492, 11499, 11502, 11506, 11507, 11520, 11557, 11559, 11559, 11565, 11565, 11568, 11623, 11631, 11631, 11648, 11670, 11680, 11686, 11688, 11694, 11696, 11702, 11704, 11710, 11712, 11718, 11720, 11726, 11728, 11734, 11736, 11742, 11823, 11823, 12293, 12295, 12321, 12329, 12337, 12341, 12344, 12348, 12353, 12438, 12445, 12447, 12449, 12538, 12540, 12543, 12549, 12589, 12593, 12686, 12704, 12730, 12784, 12799, 13312, 19893, 19968, 40908, 40960, 42124, 42192, 42237, 42240, 42508, 42512, 42527, 42538, 42539, 42560, 42606, 42623, 42647, 42656, 42735, 42775, 42783, 42786, 42888, 42891, 42894, 42896, 42899, 42912, 42922, 43000, 43009, 43011, 43013, 43015, 43018, 43020, 43042, 43072, 43123, 43138, 43187, 43250, 43255, 43259, 43259, 43274, 43301, 43312, 43334, 43360, 43388, 43396, 43442, 43471, 43471, 43520, 43560, 43584, 43586, 43588, 43595, 43616, 43638, 43642, 43642, 43648, 43695, 43697, 43697, 43701, 43702, 43705, 43709, 43712, 43712, 43714, 43714, 43739, 43741, 43744, 43754, 43762, 43764, 43777, 43782, 43785, 43790, 43793, 43798, 43808, 43814, 43816, 43822, 43968, 44002, 44032, 55203, 55216, 55238, 55243, 55291, 63744, 64109, 64112, 64217, 64256, 64262, 64275, 64279, 64285, 64285, 64287, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65136, 65140, 65142, 65276, 65313, 65338, 65345, 65370, 65382, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500,];
+    var unicodeES5IdentifierPart = [170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 705, 710, 721, 736, 740, 748, 748, 750, 750, 768, 884, 886, 887, 890, 893, 902, 902, 904, 906, 908, 908, 910, 929, 931, 1013, 1015, 1153, 1155, 1159, 1162, 1319, 1329, 1366, 1369, 1369, 1377, 1415, 1425, 1469, 1471, 1471, 1473, 1474, 1476, 1477, 1479, 1479, 1488, 1514, 1520, 1522, 1552, 1562, 1568, 1641, 1646, 1747, 1749, 1756, 1759, 1768, 1770, 1788, 1791, 1791, 1808, 1866, 1869, 1969, 1984, 2037, 2042, 2042, 2048, 2093, 2112, 2139, 2208, 2208, 2210, 2220, 2276, 2302, 2304, 2403, 2406, 2415, 2417, 2423, 2425, 2431, 2433, 2435, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482, 2482, 2486, 2489, 2492, 2500, 2503, 2504, 2507, 2510, 2519, 2519, 2524, 2525, 2527, 2531, 2534, 2545, 2561, 2563, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613, 2614, 2616, 2617, 2620, 2620, 2622, 2626, 2631, 2632, 2635, 2637, 2641, 2641, 2649, 2652, 2654, 2654, 2662, 2677, 2689, 2691, 2693, 2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2748, 2757, 2759, 2761, 2763, 2765, 2768, 2768, 2784, 2787, 2790, 2799, 2817, 2819, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2869, 2873, 2876, 2884, 2887, 2888, 2891, 2893, 2902, 2903, 2908, 2909, 2911, 2915, 2918, 2927, 2929, 2929, 2946, 2947, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986, 2990, 3001, 3006, 3010, 3014, 3016, 3018, 3021, 3024, 3024, 3031, 3031, 3046, 3055, 3073, 3075, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3123, 3125, 3129, 3133, 3140, 3142, 3144, 3146, 3149, 3157, 3158, 3160, 3161, 3168, 3171, 3174, 3183, 3202, 3203, 3205, 3212, 3214, 3216, 3218, 3240, 3242, 3251, 3253, 3257, 3260, 3268, 3270, 3272, 3274, 3277, 3285, 3286, 3294, 3294, 3296, 3299, 3302, 3311, 3313, 3314, 3330, 3331, 3333, 3340, 3342, 3344, 3346, 3386, 3389, 3396, 3398, 3400, 3402, 3406, 3415, 3415, 3424, 3427, 3430, 3439, 3450, 3455, 3458, 3459, 3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3530, 3530, 3535, 3540, 3542, 3542, 3544, 3551, 3570, 3571, 3585, 3642, 3648, 3662, 3664, 3673, 3713, 3714, 3716, 3716, 3719, 3720, 3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757, 3769, 3771, 3773, 3776, 3780, 3782, 3782, 3784, 3789, 3792, 3801, 3804, 3807, 3840, 3840, 3864, 3865, 3872, 3881, 3893, 3893, 3895, 3895, 3897, 3897, 3902, 3911, 3913, 3948, 3953, 3972, 3974, 3991, 3993, 4028, 4038, 4038, 4096, 4169, 4176, 4253, 4256, 4293, 4295, 4295, 4301, 4301, 4304, 4346, 4348, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4744, 4746, 4749, 4752, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4822, 4824, 4880, 4882, 4885, 4888, 4954, 4957, 4959, 4992, 5007, 5024, 5108, 5121, 5740, 5743, 5759, 5761, 5786, 5792, 5866, 5870, 5872, 5888, 5900, 5902, 5908, 5920, 5940, 5952, 5971, 5984, 5996, 5998, 6000, 6002, 6003, 6016, 6099, 6103, 6103, 6108, 6109, 6112, 6121, 6155, 6157, 6160, 6169, 6176, 6263, 6272, 6314, 6320, 6389, 6400, 6428, 6432, 6443, 6448, 6459, 6470, 6509, 6512, 6516, 6528, 6571, 6576, 6601, 6608, 6617, 6656, 6683, 6688, 6750, 6752, 6780, 6783, 6793, 6800, 6809, 6823, 6823, 6912, 6987, 6992, 7001, 7019, 7027, 7040, 7155, 7168, 7223, 7232, 7241, 7245, 7293, 7376, 7378, 7380, 7414, 7424, 7654, 7676, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8204, 8205, 8255, 8256, 8276, 8276, 8305, 8305, 8319, 8319, 8336, 8348, 8400, 8412, 8417, 8417, 8421, 8432, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8473, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8505, 8508, 8511, 8517, 8521, 8526, 8526, 8544, 8584, 11264, 11310, 11312, 11358, 11360, 11492, 11499, 11507, 11520, 11557, 11559, 11559, 11565, 11565, 11568, 11623, 11631, 11631, 11647, 11670, 11680, 11686, 11688, 11694, 11696, 11702, 11704, 11710, 11712, 11718, 11720, 11726, 11728, 11734, 11736, 11742, 11744, 11775, 11823, 11823, 12293, 12295, 12321, 12335, 12337, 12341, 12344, 12348, 12353, 12438, 12441, 12442, 12445, 12447, 12449, 12538, 12540, 12543, 12549, 12589, 12593, 12686, 12704, 12730, 12784, 12799, 13312, 19893, 19968, 40908, 40960, 42124, 42192, 42237, 42240, 42508, 42512, 42539, 42560, 42607, 42612, 42621, 42623, 42647, 42655, 42737, 42775, 42783, 42786, 42888, 42891, 42894, 42896, 42899, 42912, 42922, 43000, 43047, 43072, 43123, 43136, 43204, 43216, 43225, 43232, 43255, 43259, 43259, 43264, 43309, 43312, 43347, 43360, 43388, 43392, 43456, 43471, 43481, 43520, 43574, 43584, 43597, 43600, 43609, 43616, 43638, 43642, 43643, 43648, 43714, 43739, 43741, 43744, 43759, 43762, 43766, 43777, 43782, 43785, 43790, 43793, 43798, 43808, 43814, 43816, 43822, 43968, 44010, 44012, 44013, 44016, 44025, 44032, 55203, 55216, 55238, 55243, 55291, 63744, 64109, 64112, 64217, 64256, 64262, 64275, 64279, 64285, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65024, 65039, 65056, 65062, 65075, 65076, 65101, 65103, 65136, 65140, 65142, 65276, 65296, 65305, 65313, 65338, 65343, 65343, 65345, 65370, 65382, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500,];
+    function lookupInUnicodeMap(code, map) {
+        // Bail out quickly if it couldn't possibly be in the map.
+        if (code < map[0]) {
+            return false;
+        }
+        // Perform binary search in one of the Unicode range maps
+        var lo = 0;
+        var hi = map.length;
+        var mid;
+        while (lo + 1 < hi) {
+            mid = lo + (hi - lo) / 2;
+            // mid has to be even to catch a range's beginning
+            mid -= mid % 2;
+            if (map[mid] <= code && code <= map[mid + 1]) {
+                return true;
+            }
+            if (code < map[mid]) {
+                hi = mid;
+            }
+            else {
+                lo = mid + 2;
+            }
+        }
+        return false;
+    }
+    /* @internal */ function isUnicodeIdentifierStart(code, languageVersion) {
+        return languageVersion >= 1 /* ES5 */ ?
+            lookupInUnicodeMap(code, unicodeES5IdentifierStart) :
+            lookupInUnicodeMap(code, unicodeES3IdentifierStart);
+    }
+    ts.isUnicodeIdentifierStart = isUnicodeIdentifierStart;
+    function isUnicodeIdentifierPart(code, languageVersion) {
+        return languageVersion >= 1 /* ES5 */ ?
+            lookupInUnicodeMap(code, unicodeES5IdentifierPart) :
+            lookupInUnicodeMap(code, unicodeES3IdentifierPart);
+    }
+    function makeReverseMap(source) {
+        var result = [];
+        source.forEach(function (value, name) {
+            result[value] = name;
+        });
+        return result;
+    }
+    var tokenStrings = makeReverseMap(textToToken);
+    function tokenToString(t) {
+        return tokenStrings[t];
+    }
+    ts.tokenToString = tokenToString;
+    /* @internal */
+    function stringToToken(s) {
+        return textToToken.get(s);
+    }
+    ts.stringToToken = stringToToken;
+    /* @internal */
+    function computeLineStarts(text) {
+        var result = new Array();
+        var pos = 0;
+        var lineStart = 0;
+        while (pos < text.length) {
+            var ch = text.charCodeAt(pos);
+            pos++;
+            switch (ch) {
+                case 13 /* carriageReturn */:
+                    if (text.charCodeAt(pos) === 10 /* lineFeed */) {
+                        pos++;
+                    }
+                // falls through
+                case 10 /* lineFeed */:
+                    result.push(lineStart);
+                    lineStart = pos;
+                    break;
+                default:
+                    if (ch > 127 /* maxAsciiCharacter */ && isLineBreak(ch)) {
+                        result.push(lineStart);
+                        lineStart = pos;
+                    }
+                    break;
+            }
+        }
+        result.push(lineStart);
+        return result;
+    }
+    ts.computeLineStarts = computeLineStarts;
+    function getPositionOfLineAndCharacter(sourceFile, line, character) {
+        return computePositionOfLineAndCharacter(getLineStarts(sourceFile), line, character);
+    }
+    ts.getPositionOfLineAndCharacter = getPositionOfLineAndCharacter;
+    /* @internal */
+    function computePositionOfLineAndCharacter(lineStarts, line, character) {
+        ts.Debug.assert(line >= 0 && line < lineStarts.length);
+        return lineStarts[line] + character;
+    }
+    ts.computePositionOfLineAndCharacter = computePositionOfLineAndCharacter;
+    /* @internal */
+    function getLineStarts(sourceFile) {
+        return sourceFile.lineMap || (sourceFile.lineMap = computeLineStarts(sourceFile.text));
+    }
+    ts.getLineStarts = getLineStarts;
+    /* @internal */
+    /**
+     * We assume the first line starts at position 0 and 'position' is non-negative.
+     */
+    function computeLineAndCharacterOfPosition(lineStarts, position) {
+        var lineNumber = ts.binarySearch(lineStarts, position);
+        if (lineNumber < 0) {
+            // If the actual position was not found,
+            // the binary search returns the 2's-complement of the next line start
+            // e.g. if the line starts at [5, 10, 23, 80] and the position requested was 20
+            // then the search will return -2.
+            //
+            // We want the index of the previous line start, so we subtract 1.
+            // Review 2's-complement if this is confusing.
+            lineNumber = ~lineNumber - 1;
+            ts.Debug.assert(lineNumber !== -1, "position cannot precede the beginning of the file");
+        }
+        return {
+            line: lineNumber,
+            character: position - lineStarts[lineNumber]
+        };
+    }
+    ts.computeLineAndCharacterOfPosition = computeLineAndCharacterOfPosition;
+    function getLineAndCharacterOfPosition(sourceFile, position) {
+        return computeLineAndCharacterOfPosition(getLineStarts(sourceFile), position);
+    }
+    ts.getLineAndCharacterOfPosition = getLineAndCharacterOfPosition;
+    function isWhiteSpaceLike(ch) {
+        return isWhiteSpaceSingleLine(ch) || isLineBreak(ch);
+    }
+    ts.isWhiteSpaceLike = isWhiteSpaceLike;
+    /** Does not include line breaks. For that, see isWhiteSpaceLike. */
+    function isWhiteSpaceSingleLine(ch) {
+        // Note: nextLine is in the Zs space, and should be considered to be a whitespace.
+        // It is explicitly not a line-break as it isn't in the exact set specified by EcmaScript.
+        return ch === 32 /* space */ ||
+            ch === 9 /* tab */ ||
+            ch === 11 /* verticalTab */ ||
+            ch === 12 /* formFeed */ ||
+            ch === 160 /* nonBreakingSpace */ ||
+            ch === 133 /* nextLine */ ||
+            ch === 5760 /* ogham */ ||
+            ch >= 8192 /* enQuad */ && ch <= 8203 /* zeroWidthSpace */ ||
+            ch === 8239 /* narrowNoBreakSpace */ ||
+            ch === 8287 /* mathematicalSpace */ ||
+            ch === 12288 /* ideographicSpace */ ||
+            ch === 65279 /* byteOrderMark */;
+    }
+    ts.isWhiteSpaceSingleLine = isWhiteSpaceSingleLine;
+    function isLineBreak(ch) {
+        // ES5 7.3:
+        // The ECMAScript line terminator characters are listed in Table 3.
+        //     Table 3: Line Terminator Characters
+        //     Code Unit Value     Name                    Formal Name
+        //     \u000A              Line Feed               <LF>
+        //     \u000D              Carriage Return         <CR>
+        //     \u2028              Line separator          <LS>
+        //     \u2029              Paragraph separator     <PS>
+        // Only the characters in Table 3 are treated as line terminators. Other new line or line
+        // breaking characters are treated as white space but not as line terminators.
+        return ch === 10 /* lineFeed */ ||
+            ch === 13 /* carriageReturn */ ||
+            ch === 8232 /* lineSeparator */ ||
+            ch === 8233 /* paragraphSeparator */;
+    }
+    ts.isLineBreak = isLineBreak;
+    function isDigit(ch) {
+        return ch >= 48 /* _0 */ && ch <= 57 /* _9 */;
+    }
+    /* @internal */
+    function isOctalDigit(ch) {
+        return ch >= 48 /* _0 */ && ch <= 55 /* _7 */;
+    }
+    ts.isOctalDigit = isOctalDigit;
+    function couldStartTrivia(text, pos) {
+        // Keep in sync with skipTrivia
+        var ch = text.charCodeAt(pos);
+        switch (ch) {
+            case 13 /* carriageReturn */:
+            case 10 /* lineFeed */:
+            case 9 /* tab */:
+            case 11 /* verticalTab */:
+            case 12 /* formFeed */:
+            case 32 /* space */:
+            case 47 /* slash */:
+            // starts of normal trivia
+            case 60 /* lessThan */:
+            case 124 /* bar */:
+            case 61 /* equals */:
+            case 62 /* greaterThan */:
+                // Starts of conflict marker trivia
+                return true;
+            case 35 /* hash */:
+                // Only if its the beginning can we have #! trivia
+                return pos === 0;
+            default:
+                return ch > 127 /* maxAsciiCharacter */;
+        }
+    }
+    ts.couldStartTrivia = couldStartTrivia;
+    /* @internal */
+    function skipTrivia(text, pos, stopAfterLineBreak, stopAtComments) {
+        if (stopAtComments === void 0) { stopAtComments = false; }
+        if (ts.positionIsSynthesized(pos)) {
+            return pos;
+        }
+        // Keep in sync with couldStartTrivia
+        while (true) {
+            var ch = text.charCodeAt(pos);
+            switch (ch) {
+                case 13 /* carriageReturn */:
+                    if (text.charCodeAt(pos + 1) === 10 /* lineFeed */) {
+                        pos++;
+                    }
+                // falls through
+                case 10 /* lineFeed */:
+                    pos++;
+                    if (stopAfterLineBreak) {
+                        return pos;
+                    }
+                    continue;
+                case 9 /* tab */:
+                case 11 /* verticalTab */:
+                case 12 /* formFeed */:
+                case 32 /* space */:
+                    pos++;
+                    continue;
+                case 47 /* slash */:
+                    if (stopAtComments) {
+                        break;
+                    }
+                    if (text.charCodeAt(pos + 1) === 47 /* slash */) {
+                        pos += 2;
+                        while (pos < text.length) {
+                            if (isLineBreak(text.charCodeAt(pos))) {
+                                break;
+                            }
+                            pos++;
+                        }
+                        continue;
+                    }
+                    if (text.charCodeAt(pos + 1) === 42 /* asterisk */) {
+                        pos += 2;
+                        while (pos < text.length) {
+                            if (text.charCodeAt(pos) === 42 /* asterisk */ && text.charCodeAt(pos + 1) === 47 /* slash */) {
+                                pos += 2;
+                                break;
+                            }
+                            pos++;
+                        }
+                        continue;
+                    }
+                    break;
+                case 60 /* lessThan */:
+                case 124 /* bar */:
+                case 61 /* equals */:
+                case 62 /* greaterThan */:
+                    if (isConflictMarkerTrivia(text, pos)) {
+                        pos = scanConflictMarkerTrivia(text, pos);
+                        continue;
+                    }
+                    break;
+                case 35 /* hash */:
+                    if (pos === 0 && isShebangTrivia(text, pos)) {
+                        pos = scanShebangTrivia(text, pos);
+                        continue;
+                    }
+                    break;
+                default:
+                    if (ch > 127 /* maxAsciiCharacter */ && (isWhiteSpaceLike(ch))) {
+                        pos++;
+                        continue;
+                    }
+                    break;
+            }
+            return pos;
+        }
+    }
+    ts.skipTrivia = skipTrivia;
+    // All conflict markers consist of the same character repeated seven times.  If it is
+    // a <<<<<<< or >>>>>>> marker then it is also followed by a space.
+    var mergeConflictMarkerLength = "<<<<<<<".length;
+    function isConflictMarkerTrivia(text, pos) {
+        ts.Debug.assert(pos >= 0);
+        // Conflict markers must be at the start of a line.
+        if (pos === 0 || isLineBreak(text.charCodeAt(pos - 1))) {
+            var ch = text.charCodeAt(pos);
+            if ((pos + mergeConflictMarkerLength) < text.length) {
+                for (var i = 0; i < mergeConflictMarkerLength; i++) {
+                    if (text.charCodeAt(pos + i) !== ch) {
+                        return false;
+                    }
+                }
+                return ch === 61 /* equals */ ||
+                    text.charCodeAt(pos + mergeConflictMarkerLength) === 32 /* space */;
+            }
+        }
+        return false;
+    }
+    function scanConflictMarkerTrivia(text, pos, error) {
+        if (error) {
+            error(ts.Diagnostics.Merge_conflict_marker_encountered, mergeConflictMarkerLength);
+        }
+        var ch = text.charCodeAt(pos);
+        var len = text.length;
+        if (ch === 60 /* lessThan */ || ch === 62 /* greaterThan */) {
+            while (pos < len && !isLineBreak(text.charCodeAt(pos))) {
+                pos++;
+            }
+        }
+        else {
+            ts.Debug.assert(ch === 124 /* bar */ || ch === 61 /* equals */);
+            // Consume everything from the start of a ||||||| or ======= marker to the start
+            // of the next ======= or >>>>>>> marker.
+            while (pos < len) {
+                var currentChar = text.charCodeAt(pos);
+                if ((currentChar === 61 /* equals */ || currentChar === 62 /* greaterThan */) && currentChar !== ch && isConflictMarkerTrivia(text, pos)) {
+                    break;
+                }
+                pos++;
+            }
+        }
+        return pos;
+    }
+    var shebangTriviaRegex = /^#!.*/;
+    function isShebangTrivia(text, pos) {
+        // Shebangs check must only be done at the start of the file
+        ts.Debug.assert(pos === 0);
+        return shebangTriviaRegex.test(text);
+    }
+    function scanShebangTrivia(text, pos) {
+        var shebang = shebangTriviaRegex.exec(text)[0];
+        pos = pos + shebang.length;
+        return pos;
+    }
+    /**
+     * Invokes a callback for each comment range following the provided position.
+     *
+     * Single-line comment ranges include the leading double-slash characters but not the ending
+     * line break. Multi-line comment ranges include the leading slash-asterisk and trailing
+     * asterisk-slash characters.
+     *
+     * @param reduce If true, accumulates the result of calling the callback in a fashion similar
+     *      to reduceLeft. If false, iteration stops when the callback returns a truthy value.
+     * @param text The source text to scan.
+     * @param pos The position at which to start scanning.
+     * @param trailing If false, whitespace is skipped until the first line break and comments
+     *      between that location and the next token are returned. If true, comments occurring
+     *      between the given position and the next line break are returned.
+     * @param cb The callback to execute as each comment range is encountered.
+     * @param state A state value to pass to each iteration of the callback.
+     * @param initial An initial value to pass when accumulating results (when "reduce" is true).
+     * @returns If "reduce" is true, the accumulated value. If "reduce" is false, the first truthy
+     *      return value of the callback.
+     */
+    function iterateCommentRanges(reduce, text, pos, trailing, cb, state, initial) {
+        var pendingPos;
+        var pendingEnd;
+        var pendingKind;
+        var pendingHasTrailingNewLine;
+        var hasPendingCommentRange = false;
+        var collecting = trailing || pos === 0;
+        var accumulator = initial;
+        scan: while (pos >= 0 && pos < text.length) {
+            var ch = text.charCodeAt(pos);
+            switch (ch) {
+                case 13 /* carriageReturn */:
+                    if (text.charCodeAt(pos + 1) === 10 /* lineFeed */) {
+                        pos++;
+                    }
+                // falls through
+                case 10 /* lineFeed */:
+                    pos++;
+                    if (trailing) {
+                        break scan;
+                    }
+                    collecting = true;
+                    if (hasPendingCommentRange) {
+                        pendingHasTrailingNewLine = true;
+                    }
+                    continue;
+                case 9 /* tab */:
+                case 11 /* verticalTab */:
+                case 12 /* formFeed */:
+                case 32 /* space */:
+                    pos++;
+                    continue;
+                case 47 /* slash */:
+                    var nextChar = text.charCodeAt(pos + 1);
+                    var hasTrailingNewLine = false;
+                    if (nextChar === 47 /* slash */ || nextChar === 42 /* asterisk */) {
+                        var kind = nextChar === 47 /* slash */ ? 2 /* SingleLineCommentTrivia */ : 3 /* MultiLineCommentTrivia */;
+                        var startPos = pos;
+                        pos += 2;
+                        if (nextChar === 47 /* slash */) {
+                            while (pos < text.length) {
+                                if (isLineBreak(text.charCodeAt(pos))) {
+                                    hasTrailingNewLine = true;
+                                    break;
+                                }
+                                pos++;
+                            }
+                        }
+                        else {
+                            while (pos < text.length) {
+                                if (text.charCodeAt(pos) === 42 /* asterisk */ && text.charCodeAt(pos + 1) === 47 /* slash */) {
+                                    pos += 2;
+                                    break;
+                                }
+                                pos++;
+                            }
+                        }
+                        if (collecting) {
+                            if (hasPendingCommentRange) {
+                                accumulator = cb(pendingPos, pendingEnd, pendingKind, pendingHasTrailingNewLine, state, accumulator);
+                                if (!reduce && accumulator) {
+                                    // If we are not reducing and we have a truthy result, return it.
+                                    return accumulator;
+                                }
+                                hasPendingCommentRange = false;
+                            }
+                            pendingPos = startPos;
+                            pendingEnd = pos;
+                            pendingKind = kind;
+                            pendingHasTrailingNewLine = hasTrailingNewLine;
+                            hasPendingCommentRange = true;
+                        }
+                        continue;
+                    }
+                    break scan;
+                default:
+                    if (ch > 127 /* maxAsciiCharacter */ && (isWhiteSpaceLike(ch))) {
+                        if (hasPendingCommentRange && isLineBreak(ch)) {
+                            pendingHasTrailingNewLine = true;
+                        }
+                        pos++;
+                        continue;
+                    }
+                    break scan;
+            }
+        }
+        if (hasPendingCommentRange) {
+            accumulator = cb(pendingPos, pendingEnd, pendingKind, pendingHasTrailingNewLine, state, accumulator);
+        }
+        return accumulator;
+    }
+    function forEachLeadingCommentRange(text, pos, cb, state) {
+        return iterateCommentRanges(/*reduce*/ false, text, pos, /*trailing*/ false, cb, state);
+    }
+    ts.forEachLeadingCommentRange = forEachLeadingCommentRange;
+    function forEachTrailingCommentRange(text, pos, cb, state) {
+        return iterateCommentRanges(/*reduce*/ false, text, pos, /*trailing*/ true, cb, state);
+    }
+    ts.forEachTrailingCommentRange = forEachTrailingCommentRange;
+    function reduceEachLeadingCommentRange(text, pos, cb, state, initial) {
+        return iterateCommentRanges(/*reduce*/ true, text, pos, /*trailing*/ false, cb, state, initial);
+    }
+    ts.reduceEachLeadingCommentRange = reduceEachLeadingCommentRange;
+    function reduceEachTrailingCommentRange(text, pos, cb, state, initial) {
+        return iterateCommentRanges(/*reduce*/ true, text, pos, /*trailing*/ true, cb, state, initial);
+    }
+    ts.reduceEachTrailingCommentRange = reduceEachTrailingCommentRange;
+    function appendCommentRange(pos, end, kind, hasTrailingNewLine, _state, comments) {
+        if (!comments) {
+            comments = [];
+        }
+        comments.push({ kind: kind, pos: pos, end: end, hasTrailingNewLine: hasTrailingNewLine });
+        return comments;
+    }
+    function getLeadingCommentRanges(text, pos) {
+        return reduceEachLeadingCommentRange(text, pos, appendCommentRange, /*state*/ undefined, /*initial*/ undefined);
+    }
+    ts.getLeadingCommentRanges = getLeadingCommentRanges;
+    function getTrailingCommentRanges(text, pos) {
+        return reduceEachTrailingCommentRange(text, pos, appendCommentRange, /*state*/ undefined, /*initial*/ undefined);
+    }
+    ts.getTrailingCommentRanges = getTrailingCommentRanges;
+    /** Optionally, get the shebang */
+    function getShebang(text) {
+        var match = shebangTriviaRegex.exec(text);
+        if (match) {
+            return match[0];
+        }
+    }
+    ts.getShebang = getShebang;
+    function isIdentifierStart(ch, languageVersion) {
+        return ch >= 65 /* A */ && ch <= 90 /* Z */ || ch >= 97 /* a */ && ch <= 122 /* z */ ||
+            ch === 36 /* $ */ || ch === 95 /* _ */ ||
+            ch > 127 /* maxAsciiCharacter */ && isUnicodeIdentifierStart(ch, languageVersion);
+    }
+    ts.isIdentifierStart = isIdentifierStart;
+    function isIdentifierPart(ch, languageVersion) {
+        return ch >= 65 /* A */ && ch <= 90 /* Z */ || ch >= 97 /* a */ && ch <= 122 /* z */ ||
+            ch >= 48 /* _0 */ && ch <= 57 /* _9 */ || ch === 36 /* $ */ || ch === 95 /* _ */ ||
+            ch > 127 /* maxAsciiCharacter */ && isUnicodeIdentifierPart(ch, languageVersion);
+    }
+    ts.isIdentifierPart = isIdentifierPart;
+    /* @internal */
+    function isIdentifierText(name, languageVersion) {
+        if (!isIdentifierStart(name.charCodeAt(0), languageVersion)) {
+            return false;
+        }
+        for (var i = 1; i < name.length; i++) {
+            if (!isIdentifierPart(name.charCodeAt(i), languageVersion)) {
+                return false;
+            }
+        }
+        return true;
+    }
+    ts.isIdentifierText = isIdentifierText;
+    // Creates a scanner over a (possibly unspecified) range of a piece of text.
+    function createScanner(languageVersion, skipTrivia, languageVariant, text, onError, start, length) {
+        if (languageVariant === void 0) { languageVariant = 0 /* Standard */; }
+        // Current position (end position of text of current token)
+        var pos;
+        // end of text
+        var end;
+        // Start position of whitespace before current token
+        var startPos;
+        // Start position of text of current token
+        var tokenPos;
+        var token;
+        var tokenValue;
+        var precedingLineBreak;
+        var hasExtendedUnicodeEscape;
+        var tokenIsUnterminated;
+        var numericLiteralFlags;
+        setText(text, start, length);
+        return {
+            getStartPos: function () { return startPos; },
+            getTextPos: function () { return pos; },
+            getToken: function () { return token; },
+            getTokenPos: function () { return tokenPos; },
+            getTokenText: function () { return text.substring(tokenPos, pos); },
+            getTokenValue: function () { return tokenValue; },
+            hasExtendedUnicodeEscape: function () { return hasExtendedUnicodeEscape; },
+            hasPrecedingLineBreak: function () { return precedingLineBreak; },
+            isIdentifier: function () { return token === 71 /* Identifier */ || token > 107 /* LastReservedWord */; },
+            isReservedWord: function () { return token >= 72 /* FirstReservedWord */ && token <= 107 /* LastReservedWord */; },
+            isUnterminated: function () { return tokenIsUnterminated; },
+            getNumericLiteralFlags: function () { return numericLiteralFlags; },
+            reScanGreaterToken: reScanGreaterToken,
+            reScanSlashToken: reScanSlashToken,
+            reScanTemplateToken: reScanTemplateToken,
+            scanJsxIdentifier: scanJsxIdentifier,
+            scanJsxAttributeValue: scanJsxAttributeValue,
+            reScanJsxToken: reScanJsxToken,
+            scanJsxToken: scanJsxToken,
+            scanJSDocToken: scanJSDocToken,
+            scan: scan,
+            getText: getText,
+            setText: setText,
+            setScriptTarget: setScriptTarget,
+            setLanguageVariant: setLanguageVariant,
+            setOnError: setOnError,
+            setTextPos: setTextPos,
+            tryScan: tryScan,
+            lookAhead: lookAhead,
+            scanRange: scanRange,
+        };
+        function error(message, length) {
+            if (onError) {
+                onError(message, length || 0);
+            }
+        }
+        function scanNumber() {
+            var start = pos;
+            while (isDigit(text.charCodeAt(pos)))
+                pos++;
+            if (text.charCodeAt(pos) === 46 /* dot */) {
+                pos++;
+                while (isDigit(text.charCodeAt(pos)))
+                    pos++;
+            }
+            var end = pos;
+            if (text.charCodeAt(pos) === 69 /* E */ || text.charCodeAt(pos) === 101 /* e */) {
+                pos++;
+                numericLiteralFlags = 2 /* Scientific */;
+                if (text.charCodeAt(pos) === 43 /* plus */ || text.charCodeAt(pos) === 45 /* minus */)
+                    pos++;
+                if (isDigit(text.charCodeAt(pos))) {
+                    pos++;
+                    while (isDigit(text.charCodeAt(pos)))
+                        pos++;
+                    end = pos;
+                }
+                else {
+                    error(ts.Diagnostics.Digit_expected);
+                }
+            }
+            return "" + +(text.substring(start, end));
+        }
+        function scanOctalDigits() {
+            var start = pos;
+            while (isOctalDigit(text.charCodeAt(pos))) {
+                pos++;
+            }
+            return +(text.substring(start, pos));
+        }
+        /**
+         * Scans the given number of hexadecimal digits in the text,
+         * returning -1 if the given number is unavailable.
+         */
+        function scanExactNumberOfHexDigits(count) {
+            return scanHexDigits(/*minCount*/ count, /*scanAsManyAsPossible*/ false);
+        }
+        /**
+         * Scans as many hexadecimal digits as are available in the text,
+         * returning -1 if the given number of digits was unavailable.
+         */
+        function scanMinimumNumberOfHexDigits(count) {
+            return scanHexDigits(/*minCount*/ count, /*scanAsManyAsPossible*/ true);
+        }
+        function scanHexDigits(minCount, scanAsManyAsPossible) {
+            var digits = 0;
+            var value = 0;
+            while (digits < minCount || scanAsManyAsPossible) {
+                var ch = text.charCodeAt(pos);
+                if (ch >= 48 /* _0 */ && ch <= 57 /* _9 */) {
+                    value = value * 16 + ch - 48 /* _0 */;
+                }
+                else if (ch >= 65 /* A */ && ch <= 70 /* F */) {
+                    value = value * 16 + ch - 65 /* A */ + 10;
+                }
+                else if (ch >= 97 /* a */ && ch <= 102 /* f */) {
+                    value = value * 16 + ch - 97 /* a */ + 10;
+                }
+                else {
+                    break;
+                }
+                pos++;
+                digits++;
+            }
+            if (digits < minCount) {
+                value = -1;
+            }
+            return value;
+        }
+        function scanString(allowEscapes) {
+            if (allowEscapes === void 0) { allowEscapes = true; }
+            var quote = text.charCodeAt(pos);
+            pos++;
+            var result = "";
+            var start = pos;
+            while (true) {
+                if (pos >= end) {
+                    result += text.substring(start, pos);
+                    tokenIsUnterminated = true;
+                    error(ts.Diagnostics.Unterminated_string_literal);
+                    break;
+                }
+                var ch = text.charCodeAt(pos);
+                if (ch === quote) {
+                    result += text.substring(start, pos);
+                    pos++;
+                    break;
+                }
+                if (ch === 92 /* backslash */ && allowEscapes) {
+                    result += text.substring(start, pos);
+                    result += scanEscapeSequence();
+                    start = pos;
+                    continue;
+                }
+                if (isLineBreak(ch)) {
+                    result += text.substring(start, pos);
+                    tokenIsUnterminated = true;
+                    error(ts.Diagnostics.Unterminated_string_literal);
+                    break;
+                }
+                pos++;
+            }
+            return result;
+        }
+        /**
+         * Sets the current 'tokenValue' and returns a NoSubstitutionTemplateLiteral or
+         * a literal component of a TemplateExpression.
+         */
+        function scanTemplateAndSetTokenValue() {
+            var startedWithBacktick = text.charCodeAt(pos) === 96 /* backtick */;
+            pos++;
+            var start = pos;
+            var contents = "";
+            var resultingToken;
+            while (true) {
+                if (pos >= end) {
+                    contents += text.substring(start, pos);
+                    tokenIsUnterminated = true;
+                    error(ts.Diagnostics.Unterminated_template_literal);
+                    resultingToken = startedWithBacktick ? 13 /* NoSubstitutionTemplateLiteral */ : 16 /* TemplateTail */;
+                    break;
+                }
+                var currChar = text.charCodeAt(pos);
+                // '`'
+                if (currChar === 96 /* backtick */) {
+                    contents += text.substring(start, pos);
+                    pos++;
+                    resultingToken = startedWithBacktick ? 13 /* NoSubstitutionTemplateLiteral */ : 16 /* TemplateTail */;
+                    break;
+                }
+                // '${'
+                if (currChar === 36 /* $ */ && pos + 1 < end && text.charCodeAt(pos + 1) === 123 /* openBrace */) {
+                    contents += text.substring(start, pos);
+                    pos += 2;
+                    resultingToken = startedWithBacktick ? 14 /* TemplateHead */ : 15 /* TemplateMiddle */;
+                    break;
+                }
+                // Escape character
+                if (currChar === 92 /* backslash */) {
+                    contents += text.substring(start, pos);
+                    contents += scanEscapeSequence();
+                    start = pos;
+                    continue;
+                }
+                // Speculated ECMAScript 6 Spec 11.8.6.1:
+                // <CR><LF> and <CR> LineTerminatorSequences are normalized to <LF> for Template Values
+                if (currChar === 13 /* carriageReturn */) {
+                    contents += text.substring(start, pos);
+                    pos++;
+                    if (pos < end && text.charCodeAt(pos) === 10 /* lineFeed */) {
+                        pos++;
+                    }
+                    contents += "\n";
+                    start = pos;
+                    continue;
+                }
+                pos++;
+            }
+            ts.Debug.assert(resultingToken !== undefined);
+            tokenValue = contents;
+            return resultingToken;
+        }
+        function scanEscapeSequence() {
+            pos++;
+            if (pos >= end) {
+                error(ts.Diagnostics.Unexpected_end_of_text);
+                return "";
+            }
+            var ch = text.charCodeAt(pos);
+            pos++;
+            switch (ch) {
+                case 48 /* _0 */:
+                    return "\0";
+                case 98 /* b */:
+                    return "\b";
+                case 116 /* t */:
+                    return "\t";
+                case 110 /* n */:
+                    return "\n";
+                case 118 /* v */:
+                    return "\v";
+                case 102 /* f */:
+                    return "\f";
+                case 114 /* r */:
+                    return "\r";
+                case 39 /* singleQuote */:
+                    return "\'";
+                case 34 /* doubleQuote */:
+                    return "\"";
+                case 117 /* u */:
+                    // '\u{DDDDDDDD}'
+                    if (pos < end && text.charCodeAt(pos) === 123 /* openBrace */) {
+                        hasExtendedUnicodeEscape = true;
+                        pos++;
+                        return scanExtendedUnicodeEscape();
+                    }
+                    // '\uDDDD'
+                    return scanHexadecimalEscape(/*numDigits*/ 4);
+                case 120 /* x */:
+                    // '\xDD'
+                    return scanHexadecimalEscape(/*numDigits*/ 2);
+                // when encountering a LineContinuation (i.e. a backslash and a line terminator sequence),
+                // the line terminator is interpreted to be "the empty code unit sequence".
+                case 13 /* carriageReturn */:
+                    if (pos < end && text.charCodeAt(pos) === 10 /* lineFeed */) {
+                        pos++;
+                    }
+                // falls through
+                case 10 /* lineFeed */:
+                case 8232 /* lineSeparator */:
+                case 8233 /* paragraphSeparator */:
+                    return "";
+                default:
+                    return String.fromCharCode(ch);
+            }
+        }
+        function scanHexadecimalEscape(numDigits) {
+            var escapedValue = scanExactNumberOfHexDigits(numDigits);
+            if (escapedValue >= 0) {
+                return String.fromCharCode(escapedValue);
+            }
+            else {
+                error(ts.Diagnostics.Hexadecimal_digit_expected);
+                return "";
+            }
+        }
+        function scanExtendedUnicodeEscape() {
+            var escapedValue = scanMinimumNumberOfHexDigits(1);
+            var isInvalidExtendedEscape = false;
+            // Validate the value of the digit
+            if (escapedValue < 0) {
+                error(ts.Diagnostics.Hexadecimal_digit_expected);
+                isInvalidExtendedEscape = true;
+            }
+            else if (escapedValue > 0x10FFFF) {
+                error(ts.Diagnostics.An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive);
+                isInvalidExtendedEscape = true;
+            }
+            if (pos >= end) {
+                error(ts.Diagnostics.Unexpected_end_of_text);
+                isInvalidExtendedEscape = true;
+            }
+            else if (text.charCodeAt(pos) === 125 /* closeBrace */) {
+                // Only swallow the following character up if it's a '}'.
+                pos++;
+            }
+            else {
+                error(ts.Diagnostics.Unterminated_Unicode_escape_sequence);
+                isInvalidExtendedEscape = true;
+            }
+            if (isInvalidExtendedEscape) {
+                return "";
+            }
+            return utf16EncodeAsString(escapedValue);
+        }
+        // Derived from the 10.1.1 UTF16Encoding of the ES6 Spec.
+        function utf16EncodeAsString(codePoint) {
+            ts.Debug.assert(0x0 <= codePoint && codePoint <= 0x10FFFF);
+            if (codePoint <= 65535) {
+                return String.fromCharCode(codePoint);
+            }
+            var codeUnit1 = Math.floor((codePoint - 65536) / 1024) + 0xD800;
+            var codeUnit2 = ((codePoint - 65536) % 1024) + 0xDC00;
+            return String.fromCharCode(codeUnit1, codeUnit2);
+        }
+        // Current character is known to be a backslash. Check for Unicode escape of the form '\uXXXX'
+        // and return code point value if valid Unicode escape is found. Otherwise return -1.
+        function peekUnicodeEscape() {
+            if (pos + 5 < end && text.charCodeAt(pos + 1) === 117 /* u */) {
+                var start_1 = pos;
+                pos += 2;
+                var value = scanExactNumberOfHexDigits(4);
+                pos = start_1;
+                return value;
+            }
+            return -1;
+        }
+        function scanIdentifierParts() {
+            var result = "";
+            var start = pos;
+            while (pos < end) {
+                var ch = text.charCodeAt(pos);
+                if (isIdentifierPart(ch, languageVersion)) {
+                    pos++;
+                }
+                else if (ch === 92 /* backslash */) {
+                    ch = peekUnicodeEscape();
+                    if (!(ch >= 0 && isIdentifierPart(ch, languageVersion))) {
+                        break;
+                    }
+                    result += text.substring(start, pos);
+                    result += String.fromCharCode(ch);
+                    // Valid Unicode escape is always six characters
+                    pos += 6;
+                    start = pos;
+                }
+                else {
+                    break;
+                }
+            }
+            result += text.substring(start, pos);
+            return result;
+        }
+        function getIdentifierToken() {
+            // Reserved words are between 2 and 11 characters long and start with a lowercase letter
+            var len = tokenValue.length;
+            if (len >= 2 && len <= 11) {
+                var ch = tokenValue.charCodeAt(0);
+                if (ch >= 97 /* a */ && ch <= 122 /* z */) {
+                    token = textToToken.get(tokenValue);
+                    if (token !== undefined) {
+                        return token;
+                    }
+                }
+            }
+            return token = 71 /* Identifier */;
+        }
+        function scanBinaryOrOctalDigits(base) {
+            ts.Debug.assert(base === 2 || base === 8, "Expected either base 2 or base 8");
+            var value = 0;
+            // For counting number of digits; Valid binaryIntegerLiteral must have at least one binary digit following B or b.
+            // Similarly valid octalIntegerLiteral must have at least one octal digit following o or O.
+            var numberOfDigits = 0;
+            while (true) {
+                var ch = text.charCodeAt(pos);
+                var valueOfCh = ch - 48 /* _0 */;
+                if (!isDigit(ch) || valueOfCh >= base) {
+                    break;
+                }
+                value = value * base + valueOfCh;
+                pos++;
+                numberOfDigits++;
+            }
+            // Invalid binaryIntegerLiteral or octalIntegerLiteral
+            if (numberOfDigits === 0) {
+                return -1;
+            }
+            return value;
+        }
+        function scan() {
+            startPos = pos;
+            hasExtendedUnicodeEscape = false;
+            precedingLineBreak = false;
+            tokenIsUnterminated = false;
+            numericLiteralFlags = 0;
+            while (true) {
+                tokenPos = pos;
+                if (pos >= end) {
+                    return token = 1 /* EndOfFileToken */;
+                }
+                var ch = text.charCodeAt(pos);
+                // Special handling for shebang
+                if (ch === 35 /* hash */ && pos === 0 && isShebangTrivia(text, pos)) {
+                    pos = scanShebangTrivia(text, pos);
+                    if (skipTrivia) {
+                        continue;
+                    }
+                    else {
+                        return token = 6 /* ShebangTrivia */;
+                    }
+                }
+                switch (ch) {
+                    case 10 /* lineFeed */:
+                    case 13 /* carriageReturn */:
+                        precedingLineBreak = true;
+                        if (skipTrivia) {
+                            pos++;
+                            continue;
+                        }
+                        else {
+                            if (ch === 13 /* carriageReturn */ && pos + 1 < end && text.charCodeAt(pos + 1) === 10 /* lineFeed */) {
+                                // consume both CR and LF
+                                pos += 2;
+                            }
+                            else {
+                                pos++;
+                            }
+                            return token = 4 /* NewLineTrivia */;
+                        }
+                    case 9 /* tab */:
+                    case 11 /* verticalTab */:
+                    case 12 /* formFeed */:
+                    case 32 /* space */:
+                        if (skipTrivia) {
+                            pos++;
+                            continue;
+                        }
+                        else {
+                            while (pos < end && isWhiteSpaceSingleLine(text.charCodeAt(pos))) {
+                                pos++;
+                            }
+                            return token = 5 /* WhitespaceTrivia */;
+                        }
+                    case 33 /* exclamation */:
+                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
+                            if (text.charCodeAt(pos + 2) === 61 /* equals */) {
+                                return pos += 3, token = 35 /* ExclamationEqualsEqualsToken */;
+                            }
+                            return pos += 2, token = 33 /* ExclamationEqualsToken */;
+                        }
+                        pos++;
+                        return token = 51 /* ExclamationToken */;
+                    case 34 /* doubleQuote */:
+                    case 39 /* singleQuote */:
+                        tokenValue = scanString();
+                        return token = 9 /* StringLiteral */;
+                    case 96 /* backtick */:
+                        return token = scanTemplateAndSetTokenValue();
+                    case 37 /* percent */:
+                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
+                            return pos += 2, token = 64 /* PercentEqualsToken */;
+                        }
+                        pos++;
+                        return token = 42 /* PercentToken */;
+                    case 38 /* ampersand */:
+                        if (text.charCodeAt(pos + 1) === 38 /* ampersand */) {
+                            return pos += 2, token = 53 /* AmpersandAmpersandToken */;
+                        }
+                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
+                            return pos += 2, token = 68 /* AmpersandEqualsToken */;
+                        }
+                        pos++;
+                        return token = 48 /* AmpersandToken */;
+                    case 40 /* openParen */:
+                        pos++;
+                        return token = 19 /* OpenParenToken */;
+                    case 41 /* closeParen */:
+                        pos++;
+                        return token = 20 /* CloseParenToken */;
+                    case 42 /* asterisk */:
+                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
+                            return pos += 2, token = 61 /* AsteriskEqualsToken */;
+                        }
+                        if (text.charCodeAt(pos + 1) === 42 /* asterisk */) {
+                            if (text.charCodeAt(pos + 2) === 61 /* equals */) {
+                                return pos += 3, token = 62 /* AsteriskAsteriskEqualsToken */;
+                            }
+                            return pos += 2, token = 40 /* AsteriskAsteriskToken */;
+                        }
+                        pos++;
+                        return token = 39 /* AsteriskToken */;
+                    case 43 /* plus */:
+                        if (text.charCodeAt(pos + 1) === 43 /* plus */) {
+                            return pos += 2, token = 43 /* PlusPlusToken */;
+                        }
+                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
+                            return pos += 2, token = 59 /* PlusEqualsToken */;
+                        }
+                        pos++;
+                        return token = 37 /* PlusToken */;
+                    case 44 /* comma */:
+                        pos++;
+                        return token = 26 /* CommaToken */;
+                    case 45 /* minus */:
+                        if (text.charCodeAt(pos + 1) === 45 /* minus */) {
+                            return pos += 2, token = 44 /* MinusMinusToken */;
+                        }
+                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
+                            return pos += 2, token = 60 /* MinusEqualsToken */;
+                        }
+                        pos++;
+                        return token = 38 /* MinusToken */;
+                    case 46 /* dot */:
+                        if (isDigit(text.charCodeAt(pos + 1))) {
+                            tokenValue = scanNumber();
+                            return token = 8 /* NumericLiteral */;
+                        }
+                        if (text.charCodeAt(pos + 1) === 46 /* dot */ && text.charCodeAt(pos + 2) === 46 /* dot */) {
+                            return pos += 3, token = 24 /* DotDotDotToken */;
+                        }
+                        pos++;
+                        return token = 23 /* DotToken */;
+                    case 47 /* slash */:
+                        // Single-line comment
+                        if (text.charCodeAt(pos + 1) === 47 /* slash */) {
+                            pos += 2;
+                            while (pos < end) {
+                                if (isLineBreak(text.charCodeAt(pos))) {
+                                    break;
+                                }
+                                pos++;
+                            }
+                            if (skipTrivia) {
+                                continue;
+                            }
+                            else {
+                                return token = 2 /* SingleLineCommentTrivia */;
+                            }
+                        }
+                        // Multi-line comment
+                        if (text.charCodeAt(pos + 1) === 42 /* asterisk */) {
+                            pos += 2;
+                            var commentClosed = false;
+                            while (pos < end) {
+                                var ch_1 = text.charCodeAt(pos);
+                                if (ch_1 === 42 /* asterisk */ && text.charCodeAt(pos + 1) === 47 /* slash */) {
+                                    pos += 2;
+                                    commentClosed = true;
+                                    break;
+                                }
+                                if (isLineBreak(ch_1)) {
+                                    precedingLineBreak = true;
+                                }
+                                pos++;
+                            }
+                            if (!commentClosed) {
+                                error(ts.Diagnostics.Asterisk_Slash_expected);
+                            }
+                            if (skipTrivia) {
+                                continue;
+                            }
+                            else {
+                                tokenIsUnterminated = !commentClosed;
+                                return token = 3 /* MultiLineCommentTrivia */;
+                            }
+                        }
+                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
+                            return pos += 2, token = 63 /* SlashEqualsToken */;
+                        }
+                        pos++;
+                        return token = 41 /* SlashToken */;
+                    case 48 /* _0 */:
+                        if (pos + 2 < end && (text.charCodeAt(pos + 1) === 88 /* X */ || text.charCodeAt(pos + 1) === 120 /* x */)) {
+                            pos += 2;
+                            var value = scanMinimumNumberOfHexDigits(1);
+                            if (value < 0) {
+                                error(ts.Diagnostics.Hexadecimal_digit_expected);
+                                value = 0;
+                            }
+                            tokenValue = "" + value;
+                            numericLiteralFlags = 8 /* HexSpecifier */;
+                            return token = 8 /* NumericLiteral */;
+                        }
+                        else if (pos + 2 < end && (text.charCodeAt(pos + 1) === 66 /* B */ || text.charCodeAt(pos + 1) === 98 /* b */)) {
+                            pos += 2;
+                            var value = scanBinaryOrOctalDigits(/* base */ 2);
+                            if (value < 0) {
+                                error(ts.Diagnostics.Binary_digit_expected);
+                                value = 0;
+                            }
+                            tokenValue = "" + value;
+                            numericLiteralFlags = 16 /* BinarySpecifier */;
+                            return token = 8 /* NumericLiteral */;
+                        }
+                        else if (pos + 2 < end && (text.charCodeAt(pos + 1) === 79 /* O */ || text.charCodeAt(pos + 1) === 111 /* o */)) {
+                            pos += 2;
+                            var value = scanBinaryOrOctalDigits(/* base */ 8);
+                            if (value < 0) {
+                                error(ts.Diagnostics.Octal_digit_expected);
+                                value = 0;
+                            }
+                            tokenValue = "" + value;
+                            numericLiteralFlags = 32 /* OctalSpecifier */;
+                            return token = 8 /* NumericLiteral */;
+                        }
+                        // Try to parse as an octal
+                        if (pos + 1 < end && isOctalDigit(text.charCodeAt(pos + 1))) {
+                            tokenValue = "" + scanOctalDigits();
+                            numericLiteralFlags = 4 /* Octal */;
+                            return token = 8 /* NumericLiteral */;
+                        }
+                    // This fall-through is a deviation from the EcmaScript grammar. The grammar says that a leading zero
+                    // can only be followed by an octal digit, a dot, or the end of the number literal. However, we are being
+                    // permissive and allowing decimal digits of the form 08* and 09* (which many browsers also do).
+                    // falls through
+                    case 49 /* _1 */:
+                    case 50 /* _2 */:
+                    case 51 /* _3 */:
+                    case 52 /* _4 */:
+                    case 53 /* _5 */:
+                    case 54 /* _6 */:
+                    case 55 /* _7 */:
+                    case 56 /* _8 */:
+                    case 57 /* _9 */:
+                        tokenValue = scanNumber();
+                        return token = 8 /* NumericLiteral */;
+                    case 58 /* colon */:
+                        pos++;
+                        return token = 56 /* ColonToken */;
+                    case 59 /* semicolon */:
+                        pos++;
+                        return token = 25 /* SemicolonToken */;
+                    case 60 /* lessThan */:
+                        if (isConflictMarkerTrivia(text, pos)) {
+                            pos = scanConflictMarkerTrivia(text, pos, error);
+                            if (skipTrivia) {
+                                continue;
+                            }
+                            else {
+                                return token = 7 /* ConflictMarkerTrivia */;
+                            }
+                        }
+                        if (text.charCodeAt(pos + 1) === 60 /* lessThan */) {
+                            if (text.charCodeAt(pos + 2) === 61 /* equals */) {
+                                return pos += 3, token = 65 /* LessThanLessThanEqualsToken */;
+                            }
+                            return pos += 2, token = 45 /* LessThanLessThanToken */;
+                        }
+                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
+                            return pos += 2, token = 30 /* LessThanEqualsToken */;
+                        }
+                        if (languageVariant === 1 /* JSX */ &&
+                            text.charCodeAt(pos + 1) === 47 /* slash */ &&
+                            text.charCodeAt(pos + 2) !== 42 /* asterisk */) {
+                            return pos += 2, token = 28 /* LessThanSlashToken */;
+                        }
+                        pos++;
+                        return token = 27 /* LessThanToken */;
+                    case 61 /* equals */:
+                        if (isConflictMarkerTrivia(text, pos)) {
+                            pos = scanConflictMarkerTrivia(text, pos, error);
+                            if (skipTrivia) {
+                                continue;
+                            }
+                            else {
+                                return token = 7 /* ConflictMarkerTrivia */;
+                            }
+                        }
+                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
+                            if (text.charCodeAt(pos + 2) === 61 /* equals */) {
+                                return pos += 3, token = 34 /* EqualsEqualsEqualsToken */;
+                            }
+                            return pos += 2, token = 32 /* EqualsEqualsToken */;
+                        }
+                        if (text.charCodeAt(pos + 1) === 62 /* greaterThan */) {
+                            return pos += 2, token = 36 /* EqualsGreaterThanToken */;
+                        }
+                        pos++;
+                        return token = 58 /* EqualsToken */;
+                    case 62 /* greaterThan */:
+                        if (isConflictMarkerTrivia(text, pos)) {
+                            pos = scanConflictMarkerTrivia(text, pos, error);
+                            if (skipTrivia) {
+                                continue;
+                            }
+                            else {
+                                return token = 7 /* ConflictMarkerTrivia */;
+                            }
+                        }
+                        pos++;
+                        return token = 29 /* GreaterThanToken */;
+                    case 63 /* question */:
+                        pos++;
+                        return token = 55 /* QuestionToken */;
+                    case 91 /* openBracket */:
+                        pos++;
+                        return token = 21 /* OpenBracketToken */;
+                    case 93 /* closeBracket */:
+                        pos++;
+                        return token = 22 /* CloseBracketToken */;
+                    case 94 /* caret */:
+                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
+                            return pos += 2, token = 70 /* CaretEqualsToken */;
+                        }
+                        pos++;
+                        return token = 50 /* CaretToken */;
+                    case 123 /* openBrace */:
+                        pos++;
+                        return token = 17 /* OpenBraceToken */;
+                    case 124 /* bar */:
+                        if (isConflictMarkerTrivia(text, pos)) {
+                            pos = scanConflictMarkerTrivia(text, pos, error);
+                            if (skipTrivia) {
+                                continue;
+                            }
+                            else {
+                                return token = 7 /* ConflictMarkerTrivia */;
+                            }
+                        }
+                        if (text.charCodeAt(pos + 1) === 124 /* bar */) {
+                            return pos += 2, token = 54 /* BarBarToken */;
+                        }
+                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
+                            return pos += 2, token = 69 /* BarEqualsToken */;
+                        }
+                        pos++;
+                        return token = 49 /* BarToken */;
+                    case 125 /* closeBrace */:
+                        pos++;
+                        return token = 18 /* CloseBraceToken */;
+                    case 126 /* tilde */:
+                        pos++;
+                        return token = 52 /* TildeToken */;
+                    case 64 /* at */:
+                        pos++;
+                        return token = 57 /* AtToken */;
+                    case 92 /* backslash */:
+                        var cookedChar = peekUnicodeEscape();
+                        if (cookedChar >= 0 && isIdentifierStart(cookedChar, languageVersion)) {
+                            pos += 6;
+                            tokenValue = String.fromCharCode(cookedChar) + scanIdentifierParts();
+                            return token = getIdentifierToken();
+                        }
+                        error(ts.Diagnostics.Invalid_character);
+                        pos++;
+                        return token = 0 /* Unknown */;
+                    default:
+                        if (isIdentifierStart(ch, languageVersion)) {
+                            pos++;
+                            while (pos < end && isIdentifierPart(ch = text.charCodeAt(pos), languageVersion))
+                                pos++;
+                            tokenValue = text.substring(tokenPos, pos);
+                            if (ch === 92 /* backslash */) {
+                                tokenValue += scanIdentifierParts();
+                            }
+                            return token = getIdentifierToken();
+                        }
+                        else if (isWhiteSpaceSingleLine(ch)) {
+                            pos++;
+                            continue;
+                        }
+                        else if (isLineBreak(ch)) {
+                            precedingLineBreak = true;
+                            pos++;
+                            continue;
+                        }
+                        error(ts.Diagnostics.Invalid_character);
+                        pos++;
+                        return token = 0 /* Unknown */;
+                }
+            }
+        }
+        function reScanGreaterToken() {
+            if (token === 29 /* GreaterThanToken */) {
+                if (text.charCodeAt(pos) === 62 /* greaterThan */) {
+                    if (text.charCodeAt(pos + 1) === 62 /* greaterThan */) {
+                        if (text.charCodeAt(pos + 2) === 61 /* equals */) {
+                            return pos += 3, token = 67 /* GreaterThanGreaterThanGreaterThanEqualsToken */;
+                        }
+                        return pos += 2, token = 47 /* GreaterThanGreaterThanGreaterThanToken */;
+                    }
+                    if (text.charCodeAt(pos + 1) === 61 /* equals */) {
+                        return pos += 2, token = 66 /* GreaterThanGreaterThanEqualsToken */;
+                    }
+                    pos++;
+                    return token = 46 /* GreaterThanGreaterThanToken */;
+                }
+                if (text.charCodeAt(pos) === 61 /* equals */) {
+                    pos++;
+                    return token = 31 /* GreaterThanEqualsToken */;
+                }
+            }
+            return token;
+        }
+        function reScanSlashToken() {
+            if (token === 41 /* SlashToken */ || token === 63 /* SlashEqualsToken */) {
+                var p = tokenPos + 1;
+                var inEscape = false;
+                var inCharacterClass = false;
+                while (true) {
+                    // If we reach the end of a file, or hit a newline, then this is an unterminated
+                    // regex.  Report error and return what we have so far.
+                    if (p >= end) {
+                        tokenIsUnterminated = true;
+                        error(ts.Diagnostics.Unterminated_regular_expression_literal);
+                        break;
+                    }
+                    var ch = text.charCodeAt(p);
+                    if (isLineBreak(ch)) {
+                        tokenIsUnterminated = true;
+                        error(ts.Diagnostics.Unterminated_regular_expression_literal);
+                        break;
+                    }
+                    if (inEscape) {
+                        // Parsing an escape character;
+                        // reset the flag and just advance to the next char.
+                        inEscape = false;
+                    }
+                    else if (ch === 47 /* slash */ && !inCharacterClass) {
+                        // A slash within a character class is permissible,
+                        // but in general it signals the end of the regexp literal.
+                        p++;
+                        break;
+                    }
+                    else if (ch === 91 /* openBracket */) {
+                        inCharacterClass = true;
+                    }
+                    else if (ch === 92 /* backslash */) {
+                        inEscape = true;
+                    }
+                    else if (ch === 93 /* closeBracket */) {
+                        inCharacterClass = false;
+                    }
+                    p++;
+                }
+                while (p < end && isIdentifierPart(text.charCodeAt(p), languageVersion)) {
+                    p++;
+                }
+                pos = p;
+                tokenValue = text.substring(tokenPos, pos);
+                token = 12 /* RegularExpressionLiteral */;
+            }
+            return token;
+        }
+        /**
+         * Unconditionally back up and scan a template expression portion.
+         */
+        function reScanTemplateToken() {
+            ts.Debug.assert(token === 18 /* CloseBraceToken */, "'reScanTemplateToken' should only be called on a '}'");
+            pos = tokenPos;
+            return token = scanTemplateAndSetTokenValue();
+        }
+        function reScanJsxToken() {
+            pos = tokenPos = startPos;
+            return token = scanJsxToken();
+        }
+        function scanJsxToken() {
+            startPos = tokenPos = pos;
+            if (pos >= end) {
+                return token = 1 /* EndOfFileToken */;
+            }
+            var char = text.charCodeAt(pos);
+            if (char === 60 /* lessThan */) {
+                if (text.charCodeAt(pos + 1) === 47 /* slash */) {
+                    pos += 2;
+                    return token = 28 /* LessThanSlashToken */;
+                }
+                pos++;
+                return token = 27 /* LessThanToken */;
+            }
+            if (char === 123 /* openBrace */) {
+                pos++;
+                return token = 17 /* OpenBraceToken */;
+            }
+            // First non-whitespace character on this line.
+            var firstNonWhitespace = 0;
+            // These initial values are special because the first line is:
+            // firstNonWhitespace = 0 to indicate that we want leading whitspace,
+            while (pos < end) {
+                char = text.charCodeAt(pos);
+                if (char === 123 /* openBrace */) {
+                    break;
+                }
+                if (char === 60 /* lessThan */) {
+                    if (isConflictMarkerTrivia(text, pos)) {
+                        pos = scanConflictMarkerTrivia(text, pos, error);
+                        return token = 7 /* ConflictMarkerTrivia */;
+                    }
+                    break;
+                }
+                // FirstNonWhitespace is 0, then we only see whitespaces so far. If we see a linebreak, we want to ignore that whitespaces.
+                // i.e (- : whitespace)
+                //      <div>----
+                //      </div> becomes <div></div>
+                //
+                //      <div>----</div> becomes <div>----</div>
+                if (isLineBreak(char) && firstNonWhitespace === 0) {
+                    firstNonWhitespace = -1;
+                }
+                else if (!isWhiteSpaceLike(char)) {
+                    firstNonWhitespace = pos;
+                }
+                pos++;
+            }
+            return firstNonWhitespace === -1 ? 11 /* JsxTextAllWhiteSpaces */ : 10 /* JsxText */;
+        }
+        // Scans a JSX identifier; these differ from normal identifiers in that
+        // they allow dashes
+        function scanJsxIdentifier() {
+            if (tokenIsIdentifierOrKeyword(token)) {
+                var firstCharPosition = pos;
+                while (pos < end) {
+                    var ch = text.charCodeAt(pos);
+                    if (ch === 45 /* minus */ || ((firstCharPosition === pos) ? isIdentifierStart(ch, languageVersion) : isIdentifierPart(ch, languageVersion))) {
+                        pos++;
+                    }
+                    else {
+                        break;
+                    }
+                }
+                tokenValue += text.substr(firstCharPosition, pos - firstCharPosition);
+            }
+            return token;
+        }
+        function scanJsxAttributeValue() {
+            startPos = pos;
+            switch (text.charCodeAt(pos)) {
+                case 34 /* doubleQuote */:
+                case 39 /* singleQuote */:
+                    tokenValue = scanString(/*allowEscapes*/ false);
+                    return token = 9 /* StringLiteral */;
+                default:
+                    // If this scans anything other than `{`, it's a parse error.
+                    return scan();
+            }
+        }
+        function scanJSDocToken() {
+            if (pos >= end) {
+                return token = 1 /* EndOfFileToken */;
+            }
+            startPos = pos;
+            tokenPos = pos;
+            var ch = text.charCodeAt(pos);
+            switch (ch) {
+                case 9 /* tab */:
+                case 11 /* verticalTab */:
+                case 12 /* formFeed */:
+                case 32 /* space */:
+                    while (pos < end && isWhiteSpaceSingleLine(text.charCodeAt(pos))) {
+                        pos++;
+                    }
+                    return token = 5 /* WhitespaceTrivia */;
+                case 64 /* at */:
+                    pos++;
+                    return token = 57 /* AtToken */;
+                case 10 /* lineFeed */:
+                case 13 /* carriageReturn */:
+                    pos++;
+                    return token = 4 /* NewLineTrivia */;
+                case 42 /* asterisk */:
+                    pos++;
+                    return token = 39 /* AsteriskToken */;
+                case 123 /* openBrace */:
+                    pos++;
+                    return token = 17 /* OpenBraceToken */;
+                case 125 /* closeBrace */:
+                    pos++;
+                    return token = 18 /* CloseBraceToken */;
+                case 91 /* openBracket */:
+                    pos++;
+                    return token = 21 /* OpenBracketToken */;
+                case 93 /* closeBracket */:
+                    pos++;
+                    return token = 22 /* CloseBracketToken */;
+                case 61 /* equals */:
+                    pos++;
+                    return token = 58 /* EqualsToken */;
+                case 44 /* comma */:
+                    pos++;
+                    return token = 26 /* CommaToken */;
+                case 46 /* dot */:
+                    pos++;
+                    return token = 23 /* DotToken */;
+            }
+            if (isIdentifierStart(ch, 5 /* Latest */)) {
+                pos++;
+                while (isIdentifierPart(text.charCodeAt(pos), 5 /* Latest */) && pos < end) {
+                    pos++;
+                }
+                return token = 71 /* Identifier */;
+            }
+            else {
+                return pos += 1, token = 0 /* Unknown */;
+            }
+        }
+        function speculationHelper(callback, isLookahead) {
+            var savePos = pos;
+            var saveStartPos = startPos;
+            var saveTokenPos = tokenPos;
+            var saveToken = token;
+            var saveTokenValue = tokenValue;
+            var savePrecedingLineBreak = precedingLineBreak;
+            var result = callback();
+            // If our callback returned something 'falsy' or we're just looking ahead,
+            // then unconditionally restore us to where we were.
+            if (!result || isLookahead) {
+                pos = savePos;
+                startPos = saveStartPos;
+                tokenPos = saveTokenPos;
+                token = saveToken;
+                tokenValue = saveTokenValue;
+                precedingLineBreak = savePrecedingLineBreak;
+            }
+            return result;
+        }
+        function scanRange(start, length, callback) {
+            var saveEnd = end;
+            var savePos = pos;
+            var saveStartPos = startPos;
+            var saveTokenPos = tokenPos;
+            var saveToken = token;
+            var savePrecedingLineBreak = precedingLineBreak;
+            var saveTokenValue = tokenValue;
+            var saveHasExtendedUnicodeEscape = hasExtendedUnicodeEscape;
+            var saveTokenIsUnterminated = tokenIsUnterminated;
+            setText(text, start, length);
+            var result = callback();
+            end = saveEnd;
+            pos = savePos;
+            startPos = saveStartPos;
+            tokenPos = saveTokenPos;
+            token = saveToken;
+            precedingLineBreak = savePrecedingLineBreak;
+            tokenValue = saveTokenValue;
+            hasExtendedUnicodeEscape = saveHasExtendedUnicodeEscape;
+            tokenIsUnterminated = saveTokenIsUnterminated;
+            return result;
+        }
+        function lookAhead(callback) {
+            return speculationHelper(callback, /*isLookahead*/ true);
+        }
+        function tryScan(callback) {
+            return speculationHelper(callback, /*isLookahead*/ false);
+        }
+        function getText() {
+            return text;
+        }
+        function setText(newText, start, length) {
+            text = newText || "";
+            end = length === undefined ? text.length : start + length;
+            setTextPos(start || 0);
+        }
+        function setOnError(errorCallback) {
+            onError = errorCallback;
+        }
+        function setScriptTarget(scriptTarget) {
+            languageVersion = scriptTarget;
+        }
+        function setLanguageVariant(variant) {
+            languageVariant = variant;
+        }
+        function setTextPos(textPos) {
+            ts.Debug.assert(textPos >= 0);
+            pos = textPos;
+            startPos = textPos;
+            tokenPos = textPos;
+            token = 0 /* Unknown */;
+            precedingLineBreak = false;
+            tokenValue = undefined;
+            hasExtendedUnicodeEscape = false;
+            tokenIsUnterminated = false;
+        }
+    }
+    ts.createScanner = createScanner;
+})(ts || (ts = {}));
+/// <reference path="utilities.ts"/>
+/// <reference path="scanner.ts"/>
 var ts;
 (function (ts) {
-    /* @internal */
-    function tokenIsIdentifierOrKeyword(token) {
-        return token >= 69 /* Identifier */;
+    var NodeConstructor;
+    var TokenConstructor;
+    var IdentifierConstructor;
+    var SourceFileConstructor;
+    function createNode(kind, pos, end) {
+        if (kind === 265 /* SourceFile */) {
+            return new (SourceFileConstructor || (SourceFileConstructor = ts.objectAllocator.getSourceFileConstructor()))(kind, pos, end);
+        }
+        else if (kind === 71 /* Identifier */) {
+            return new (IdentifierConstructor || (IdentifierConstructor = ts.objectAllocator.getIdentifierConstructor()))(kind, pos, end);
+        }
+        else if (!ts.isNodeKind(kind)) {
+            return new (TokenConstructor || (TokenConstructor = ts.objectAllocator.getTokenConstructor()))(kind, pos, end);
+        }
+        else {
+            return new (NodeConstructor || (NodeConstructor = ts.objectAllocator.getNodeConstructor()))(kind, pos, end);
+        }
     }
-    ts.tokenIsIdentifierOrKeyword = tokenIsIdentifierOrKeyword;
-    var textToToken = ts.createMap({
-        "abstract": 115 /* AbstractKeyword */,
-        "any": 117 /* AnyKeyword */,
-        "as": 116 /* AsKeyword */,
-        "boolean": 120 /* BooleanKeyword */,
-        "break": 70 /* BreakKeyword */,
-        "case": 71 /* CaseKeyword */,
-        "catch": 72 /* CatchKeyword */,
-        "class": 73 /* ClassKeyword */,
-        "continue": 75 /* ContinueKeyword */,
-        "const": 74 /* ConstKeyword */,
-        "constructor": 121 /* ConstructorKeyword */,
-        "debugger": 76 /* DebuggerKeyword */,
-        "declare": 122 /* DeclareKeyword */,
-        "default": 77 /* DefaultKeyword */,
-        "delete": 78 /* DeleteKeyword */,
-        "do": 79 /* DoKeyword */,
-        "else": 80 /* ElseKeyword */,
-        "enum": 81 /* EnumKeyword */,
-        "export": 82 /* ExportKeyword */,
-        "extends": 83 /* ExtendsKeyword */,
-        "false": 84 /* FalseKeyword */,
-        "finally": 85 /* FinallyKeyword */,
-        "for": 86 /* ForKeyword */,
-        "from": 136 /* FromKeyword */,
-        "function": 87 /* FunctionKeyword */,
-        "get": 123 /* GetKeyword */,
-        "if": 88 /* IfKeyword */,
-        "implements": 106 /* ImplementsKeyword */,
-        "import": 89 /* ImportKeyword */,
-        "in": 90 /* InKeyword */,
-        "instanceof": 91 /* InstanceOfKeyword */,
-        "interface": 107 /* InterfaceKeyword */,
-        "is": 124 /* IsKeyword */,
-        "let": 108 /* LetKeyword */,
-        "module": 125 /* ModuleKeyword */,
-        "namespace": 126 /* NamespaceKeyword */,
-        "never": 127 /* NeverKeyword */,
-        "new": 92 /* NewKeyword */,
-        "null": 93 /* NullKeyword */,
-        "number": 130 /* NumberKeyword */,
-        "package": 109 /* PackageKeyword */,
-        "private": 110 /* PrivateKeyword */,
-        "protected": 111 /* ProtectedKeyword */,
-        "public": 112 /* PublicKeyword */,
-        "readonly": 128 /* ReadonlyKeyword */,
-        "require": 129 /* RequireKeyword */,
-        "global": 137 /* GlobalKeyword */,
-        "return": 94 /* ReturnKeyword */,
-        "set": 131 /* SetKeyword */,
-        "static": 113 /* StaticKeyword */,
-        "string": 132 /* StringKeyword */,
-        "super": 95 /* SuperKeyword */,
-        "switch": 96 /* SwitchKeyword */,
-        "symbol": 133 /* SymbolKeyword */,
-        "this": 97 /* ThisKeyword */,
-        "throw": 98 /* ThrowKeyword */,
-        "true": 99 /* TrueKeyword */,
-        "try": 100 /* TryKeyword */,
-        "type": 134 /* TypeKeyword */,
-        "typeof": 101 /* TypeOfKeyword */,
-        "undefined": 135 /* UndefinedKeyword */,
-        "var": 102 /* VarKeyword */,
-        "void": 103 /* VoidKeyword */,
-        "while": 104 /* WhileKeyword */,
-        "with": 105 /* WithKeyword */,
-        "yield": 114 /* YieldKeyword */,
-        "async": 118 /* AsyncKeyword */,
-        "await": 119 /* AwaitKeyword */,
-        "of": 138 /* OfKeyword */,
-        "{": 15 /* OpenBraceToken */,
-        "}": 16 /* CloseBraceToken */,
-        "(": 17 /* OpenParenToken */,
-        ")": 18 /* CloseParenToken */,
-        "[": 19 /* OpenBracketToken */,
-        "]": 20 /* CloseBracketToken */,
-        ".": 21 /* DotToken */,
-        "...": 22 /* DotDotDotToken */,
-        ";": 23 /* SemicolonToken */,
-        ",": 24 /* CommaToken */,
-        "<": 25 /* LessThanToken */,
-        ">": 27 /* GreaterThanToken */,
-        "<=": 28 /* LessThanEqualsToken */,
-        ">=": 29 /* GreaterThanEqualsToken */,
-        "==": 30 /* EqualsEqualsToken */,
-        "!=": 31 /* ExclamationEqualsToken */,
-        "===": 32 /* EqualsEqualsEqualsToken */,
-        "!==": 33 /* ExclamationEqualsEqualsToken */,
-        "=>": 34 /* EqualsGreaterThanToken */,
-        "+": 35 /* PlusToken */,
-        "-": 36 /* MinusToken */,
-        "**": 38 /* AsteriskAsteriskToken */,
-        "*": 37 /* AsteriskToken */,
-        "/": 39 /* SlashToken */,
-        "%": 40 /* PercentToken */,
-        "++": 41 /* PlusPlusToken */,
-        "--": 42 /* MinusMinusToken */,
-        "<<": 43 /* LessThanLessThanToken */,
-        "</": 26 /* LessThanSlashToken */,
-        ">>": 44 /* GreaterThanGreaterThanToken */,
-        ">>>": 45 /* GreaterThanGreaterThanGreaterThanToken */,
-        "&": 46 /* AmpersandToken */,
-        "|": 47 /* BarToken */,
-        "^": 48 /* CaretToken */,
-        "!": 49 /* ExclamationToken */,
-        "~": 50 /* TildeToken */,
-        "&&": 51 /* AmpersandAmpersandToken */,
-        "||": 52 /* BarBarToken */,
-        "?": 53 /* QuestionToken */,
-        ":": 54 /* ColonToken */,
-        "=": 56 /* EqualsToken */,
-        "+=": 57 /* PlusEqualsToken */,
-        "-=": 58 /* MinusEqualsToken */,
-        "*=": 59 /* AsteriskEqualsToken */,
-        "**=": 60 /* AsteriskAsteriskEqualsToken */,
-        "/=": 61 /* SlashEqualsToken */,
-        "%=": 62 /* PercentEqualsToken */,
-        "<<=": 63 /* LessThanLessThanEqualsToken */,
-        ">>=": 64 /* GreaterThanGreaterThanEqualsToken */,
-        ">>>=": 65 /* GreaterThanGreaterThanGreaterThanEqualsToken */,
-        "&=": 66 /* AmpersandEqualsToken */,
-        "|=": 67 /* BarEqualsToken */,
-        "^=": 68 /* CaretEqualsToken */,
-        "@": 55 /* AtToken */,
-    });
-    /*
-        As per ECMAScript Language Specification 3th Edition, Section 7.6: Identifiers
-        IdentifierStart ::
-            Can contain Unicode 3.0.0  categories:
-            Uppercase letter (Lu),
-            Lowercase letter (Ll),
-            Titlecase letter (Lt),
-            Modifier letter (Lm),
-            Other letter (Lo), or
-            Letter number (Nl).
-        IdentifierPart :: =
-            Can contain IdentifierStart + Unicode 3.0.0  categories:
-            Non-spacing mark (Mn),
-            Combining spacing mark (Mc),
-            Decimal number (Nd), or
-            Connector punctuation (Pc).
-
-        Codepoint ranges for ES3 Identifiers are extracted from the Unicode 3.0.0 specification at:
-        http://www.unicode.org/Public/3.0-Update/UnicodeData-3.0.0.txt
-    */
-    var unicodeES3IdentifierStart = [170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 543, 546, 563, 592, 685, 688, 696, 699, 705, 720, 721, 736, 740, 750, 750, 890, 890, 902, 902, 904, 906, 908, 908, 910, 929, 931, 974, 976, 983, 986, 1011, 1024, 1153, 1164, 1220, 1223, 1224, 1227, 1228, 1232, 1269, 1272, 1273, 1329, 1366, 1369, 1369, 1377, 1415, 1488, 1514, 1520, 1522, 1569, 1594, 1600, 1610, 1649, 1747, 1749, 1749, 1765, 1766, 1786, 1788, 1808, 1808, 1810, 1836, 1920, 1957, 2309, 2361, 2365, 2365, 2384, 2384, 2392, 2401, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482, 2482, 2486, 2489, 2524, 2525, 2527, 2529, 2544, 2545, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613, 2614, 2616, 2617, 2649, 2652, 2654, 2654, 2674, 2676, 2693, 2699, 2701, 2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2749, 2749, 2768, 2768, 2784, 2784, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2870, 2873, 2877, 2877, 2908, 2909, 2911, 2913, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986, 2990, 2997, 2999, 3001, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3123, 3125, 3129, 3168, 3169, 3205, 3212, 3214, 3216, 3218, 3240, 3242, 3251, 3253, 3257, 3294, 3294, 3296, 3297, 3333, 3340, 3342, 3344, 3346, 3368, 3370, 3385, 3424, 3425, 3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3585, 3632, 3634, 3635, 3648, 3654, 3713, 3714, 3716, 3716, 3719, 3720, 3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757, 3760, 3762, 3763, 3773, 3773, 3776, 3780, 3782, 3782, 3804, 3805, 3840, 3840, 3904, 3911, 3913, 3946, 3976, 3979, 4096, 4129, 4131, 4135, 4137, 4138, 4176, 4181, 4256, 4293, 4304, 4342, 4352, 4441, 4447, 4514, 4520, 4601, 4608, 4614, 4616, 4678, 4680, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4742, 4744, 4744, 4746, 4749, 4752, 4782, 4784, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4814, 4816, 4822, 4824, 4846, 4848, 4878, 4880, 4880, 4882, 4885, 4888, 4894, 4896, 4934, 4936, 4954, 5024, 5108, 5121, 5740, 5743, 5750, 5761, 5786, 5792, 5866, 6016, 6067, 6176, 6263, 6272, 6312, 7680, 7835, 7840, 7929, 7936, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8319, 8319, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8473, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8497, 8499, 8505, 8544, 8579, 12293, 12295, 12321, 12329, 12337, 12341, 12344, 12346, 12353, 12436, 12445, 12446, 12449, 12538, 12540, 12542, 12549, 12588, 12593, 12686, 12704, 12727, 13312, 19893, 19968, 40869, 40960, 42124, 44032, 55203, 63744, 64045, 64256, 64262, 64275, 64279, 64285, 64285, 64287, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65136, 65138, 65140, 65140, 65142, 65276, 65313, 65338, 65345, 65370, 65382, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500,];
-    var unicodeES3IdentifierPart = [170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 543, 546, 563, 592, 685, 688, 696, 699, 705, 720, 721, 736, 740, 750, 750, 768, 846, 864, 866, 890, 890, 902, 902, 904, 906, 908, 908, 910, 929, 931, 974, 976, 983, 986, 1011, 1024, 1153, 1155, 1158, 1164, 1220, 1223, 1224, 1227, 1228, 1232, 1269, 1272, 1273, 1329, 1366, 1369, 1369, 1377, 1415, 1425, 1441, 1443, 1465, 1467, 1469, 1471, 1471, 1473, 1474, 1476, 1476, 1488, 1514, 1520, 1522, 1569, 1594, 1600, 1621, 1632, 1641, 1648, 1747, 1749, 1756, 1759, 1768, 1770, 1773, 1776, 1788, 1808, 1836, 1840, 1866, 1920, 1968, 2305, 2307, 2309, 2361, 2364, 2381, 2384, 2388, 2392, 2403, 2406, 2415, 2433, 2435, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482, 2482, 2486, 2489, 2492, 2492, 2494, 2500, 2503, 2504, 2507, 2509, 2519, 2519, 2524, 2525, 2527, 2531, 2534, 2545, 2562, 2562, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613, 2614, 2616, 2617, 2620, 2620, 2622, 2626, 2631, 2632, 2635, 2637, 2649, 2652, 2654, 2654, 2662, 2676, 2689, 2691, 2693, 2699, 2701, 2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2748, 2757, 2759, 2761, 2763, 2765, 2768, 2768, 2784, 2784, 2790, 2799, 2817, 2819, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2870, 2873, 2876, 2883, 2887, 2888, 2891, 2893, 2902, 2903, 2908, 2909, 2911, 2913, 2918, 2927, 2946, 2947, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986, 2990, 2997, 2999, 3001, 3006, 3010, 3014, 3016, 3018, 3021, 3031, 3031, 3047, 3055, 3073, 3075, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3123, 3125, 3129, 3134, 3140, 3142, 3144, 3146, 3149, 3157, 3158, 3168, 3169, 3174, 3183, 3202, 3203, 3205, 3212, 3214, 3216, 3218, 3240, 3242, 3251, 3253, 3257, 3262, 3268, 3270, 3272, 3274, 3277, 3285, 3286, 3294, 3294, 3296, 3297, 3302, 3311, 3330, 3331, 3333, 3340, 3342, 3344, 3346, 3368, 3370, 3385, 3390, 3395, 3398, 3400, 3402, 3405, 3415, 3415, 3424, 3425, 3430, 3439, 3458, 3459, 3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3530, 3530, 3535, 3540, 3542, 3542, 3544, 3551, 3570, 3571, 3585, 3642, 3648, 3662, 3664, 3673, 3713, 3714, 3716, 3716, 3719, 3720, 3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757, 3769, 3771, 3773, 3776, 3780, 3782, 3782, 3784, 3789, 3792, 3801, 3804, 3805, 3840, 3840, 3864, 3865, 3872, 3881, 3893, 3893, 3895, 3895, 3897, 3897, 3902, 3911, 3913, 3946, 3953, 3972, 3974, 3979, 3984, 3991, 3993, 4028, 4038, 4038, 4096, 4129, 4131, 4135, 4137, 4138, 4140, 4146, 4150, 4153, 4160, 4169, 4176, 4185, 4256, 4293, 4304, 4342, 4352, 4441, 4447, 4514, 4520, 4601, 4608, 4614, 4616, 4678, 4680, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4742, 4744, 4744, 4746, 4749, 4752, 4782, 4784, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4814, 4816, 4822, 4824, 4846, 4848, 4878, 4880, 4880, 4882, 4885, 4888, 4894, 4896, 4934, 4936, 4954, 4969, 4977, 5024, 5108, 5121, 5740, 5743, 5750, 5761, 5786, 5792, 5866, 6016, 6099, 6112, 6121, 6160, 6169, 6176, 6263, 6272, 6313, 7680, 7835, 7840, 7929, 7936, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8255, 8256, 8319, 8319, 8400, 8412, 8417, 8417, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8473, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8497, 8499, 8505, 8544, 8579, 12293, 12295, 12321, 12335, 12337, 12341, 12344, 12346, 12353, 12436, 12441, 12442, 12445, 12446, 12449, 12542, 12549, 12588, 12593, 12686, 12704, 12727, 13312, 19893, 19968, 40869, 40960, 42124, 44032, 55203, 63744, 64045, 64256, 64262, 64275, 64279, 64285, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65056, 65059, 65075, 65076, 65101, 65103, 65136, 65138, 65140, 65140, 65142, 65276, 65296, 65305, 65313, 65338, 65343, 65343, 65345, 65370, 65381, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500,];
-    /*
-        As per ECMAScript Language Specification 5th Edition, Section 7.6: ISyntaxToken Names and Identifiers
-        IdentifierStart ::
-            Can contain Unicode 6.2  categories:
-            Uppercase letter (Lu),
-            Lowercase letter (Ll),
-            Titlecase letter (Lt),
-            Modifier letter (Lm),
-            Other letter (Lo), or
-            Letter number (Nl).
-        IdentifierPart ::
-            Can contain IdentifierStart + Unicode 6.2  categories:
-            Non-spacing mark (Mn),
-            Combining spacing mark (Mc),
-            Decimal number (Nd),
-            Connector punctuation (Pc),
-            <ZWNJ>, or
-            <ZWJ>.
-
-        Codepoint ranges for ES5 Identifiers are extracted from the Unicode 6.2 specification at:
-        http://www.unicode.org/Public/6.2.0/ucd/UnicodeData.txt
-    */
-    var unicodeES5IdentifierStart = [170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 705, 710, 721, 736, 740, 748, 748, 750, 750, 880, 884, 886, 887, 890, 893, 902, 902, 904, 906, 908, 908, 910, 929, 931, 1013, 1015, 1153, 1162, 1319, 1329, 1366, 1369, 1369, 1377, 1415, 1488, 1514, 1520, 1522, 1568, 1610, 1646, 1647, 1649, 1747, 1749, 1749, 1765, 1766, 1774, 1775, 1786, 1788, 1791, 1791, 1808, 1808, 1810, 1839, 1869, 1957, 1969, 1969, 1994, 2026, 2036, 2037, 2042, 2042, 2048, 2069, 2074, 2074, 2084, 2084, 2088, 2088, 2112, 2136, 2208, 2208, 2210, 2220, 2308, 2361, 2365, 2365, 2384, 2384, 2392, 2401, 2417, 2423, 2425, 2431, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482, 2482, 2486, 2489, 2493, 2493, 2510, 2510, 2524, 2525, 2527, 2529, 2544, 2545, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613, 2614, 2616, 2617, 2649, 2652, 2654, 2654, 2674, 2676, 2693, 2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2749, 2749, 2768, 2768, 2784, 2785, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2869, 2873, 2877, 2877, 2908, 2909, 2911, 2913, 2929, 2929, 2947, 2947, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986, 2990, 3001, 3024, 3024, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3123, 3125, 3129, 3133, 3133, 3160, 3161, 3168, 3169, 3205, 3212, 3214, 3216, 3218, 3240, 3242, 3251, 3253, 3257, 3261, 3261, 3294, 3294, 3296, 3297, 3313, 3314, 3333, 3340, 3342, 3344, 3346, 3386, 3389, 3389, 3406, 3406, 3424, 3425, 3450, 3455, 3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3585, 3632, 3634, 3635, 3648, 3654, 3713, 3714, 3716, 3716, 3719, 3720, 3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757, 3760, 3762, 3763, 3773, 3773, 3776, 3780, 3782, 3782, 3804, 3807, 3840, 3840, 3904, 3911, 3913, 3948, 3976, 3980, 4096, 4138, 4159, 4159, 4176, 4181, 4186, 4189, 4193, 4193, 4197, 4198, 4206, 4208, 4213, 4225, 4238, 4238, 4256, 4293, 4295, 4295, 4301, 4301, 4304, 4346, 4348, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4744, 4746, 4749, 4752, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4822, 4824, 4880, 4882, 4885, 4888, 4954, 4992, 5007, 5024, 5108, 5121, 5740, 5743, 5759, 5761, 5786, 5792, 5866, 5870, 5872, 5888, 5900, 5902, 5905, 5920, 5937, 5952, 5969, 5984, 5996, 5998, 6000, 6016, 6067, 6103, 6103, 6108, 6108, 6176, 6263, 6272, 6312, 6314, 6314, 6320, 6389, 6400, 6428, 6480, 6509, 6512, 6516, 6528, 6571, 6593, 6599, 6656, 6678, 6688, 6740, 6823, 6823, 6917, 6963, 6981, 6987, 7043, 7072, 7086, 7087, 7098, 7141, 7168, 7203, 7245, 7247, 7258, 7293, 7401, 7404, 7406, 7409, 7413, 7414, 7424, 7615, 7680, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8305, 8305, 8319, 8319, 8336, 8348, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8473, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8505, 8508, 8511, 8517, 8521, 8526, 8526, 8544, 8584, 11264, 11310, 11312, 11358, 11360, 11492, 11499, 11502, 11506, 11507, 11520, 11557, 11559, 11559, 11565, 11565, 11568, 11623, 11631, 11631, 11648, 11670, 11680, 11686, 11688, 11694, 11696, 11702, 11704, 11710, 11712, 11718, 11720, 11726, 11728, 11734, 11736, 11742, 11823, 11823, 12293, 12295, 12321, 12329, 12337, 12341, 12344, 12348, 12353, 12438, 12445, 12447, 12449, 12538, 12540, 12543, 12549, 12589, 12593, 12686, 12704, 12730, 12784, 12799, 13312, 19893, 19968, 40908, 40960, 42124, 42192, 42237, 42240, 42508, 42512, 42527, 42538, 42539, 42560, 42606, 42623, 42647, 42656, 42735, 42775, 42783, 42786, 42888, 42891, 42894, 42896, 42899, 42912, 42922, 43000, 43009, 43011, 43013, 43015, 43018, 43020, 43042, 43072, 43123, 43138, 43187, 43250, 43255, 43259, 43259, 43274, 43301, 43312, 43334, 43360, 43388, 43396, 43442, 43471, 43471, 43520, 43560, 43584, 43586, 43588, 43595, 43616, 43638, 43642, 43642, 43648, 43695, 43697, 43697, 43701, 43702, 43705, 43709, 43712, 43712, 43714, 43714, 43739, 43741, 43744, 43754, 43762, 43764, 43777, 43782, 43785, 43790, 43793, 43798, 43808, 43814, 43816, 43822, 43968, 44002, 44032, 55203, 55216, 55238, 55243, 55291, 63744, 64109, 64112, 64217, 64256, 64262, 64275, 64279, 64285, 64285, 64287, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65136, 65140, 65142, 65276, 65313, 65338, 65345, 65370, 65382, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500,];
-    var unicodeES5IdentifierPart = [170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 705, 710, 721, 736, 740, 748, 748, 750, 750, 768, 884, 886, 887, 890, 893, 902, 902, 904, 906, 908, 908, 910, 929, 931, 1013, 1015, 1153, 1155, 1159, 1162, 1319, 1329, 1366, 1369, 1369, 1377, 1415, 1425, 1469, 1471, 1471, 1473, 1474, 1476, 1477, 1479, 1479, 1488, 1514, 1520, 1522, 1552, 1562, 1568, 1641, 1646, 1747, 1749, 1756, 1759, 1768, 1770, 1788, 1791, 1791, 1808, 1866, 1869, 1969, 1984, 2037, 2042, 2042, 2048, 2093, 2112, 2139, 2208, 2208, 2210, 2220, 2276, 2302, 2304, 2403, 2406, 2415, 2417, 2423, 2425, 2431, 2433, 2435, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482, 2482, 2486, 2489, 2492, 2500, 2503, 2504, 2507, 2510, 2519, 2519, 2524, 2525, 2527, 2531, 2534, 2545, 2561, 2563, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613, 2614, 2616, 2617, 2620, 2620, 2622, 2626, 2631, 2632, 2635, 2637, 2641, 2641, 2649, 2652, 2654, 2654, 2662, 2677, 2689, 2691, 2693, 2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2748, 2757, 2759, 2761, 2763, 2765, 2768, 2768, 2784, 2787, 2790, 2799, 2817, 2819, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2869, 2873, 2876, 2884, 2887, 2888, 2891, 2893, 2902, 2903, 2908, 2909, 2911, 2915, 2918, 2927, 2929, 2929, 2946, 2947, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986, 2990, 3001, 3006, 3010, 3014, 3016, 3018, 3021, 3024, 3024, 3031, 3031, 3046, 3055, 3073, 3075, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3123, 3125, 3129, 3133, 3140, 3142, 3144, 3146, 3149, 3157, 3158, 3160, 3161, 3168, 3171, 3174, 3183, 3202, 3203, 3205, 3212, 3214, 3216, 3218, 3240, 3242, 3251, 3253, 3257, 3260, 3268, 3270, 3272, 3274, 3277, 3285, 3286, 3294, 3294, 3296, 3299, 3302, 3311, 3313, 3314, 3330, 3331, 3333, 3340, 3342, 3344, 3346, 3386, 3389, 3396, 3398, 3400, 3402, 3406, 3415, 3415, 3424, 3427, 3430, 3439, 3450, 3455, 3458, 3459, 3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3530, 3530, 3535, 3540, 3542, 3542, 3544, 3551, 3570, 3571, 3585, 3642, 3648, 3662, 3664, 3673, 3713, 3714, 3716, 3716, 3719, 3720, 3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757, 3769, 3771, 3773, 3776, 3780, 3782, 3782, 3784, 3789, 3792, 3801, 3804, 3807, 3840, 3840, 3864, 3865, 3872, 3881, 3893, 3893, 3895, 3895, 3897, 3897, 3902, 3911, 3913, 3948, 3953, 3972, 3974, 3991, 3993, 4028, 4038, 4038, 4096, 4169, 4176, 4253, 4256, 4293, 4295, 4295, 4301, 4301, 4304, 4346, 4348, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4744, 4746, 4749, 4752, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4822, 4824, 4880, 4882, 4885, 4888, 4954, 4957, 4959, 4992, 5007, 5024, 5108, 5121, 5740, 5743, 5759, 5761, 5786, 5792, 5866, 5870, 5872, 5888, 5900, 5902, 5908, 5920, 5940, 5952, 5971, 5984, 5996, 5998, 6000, 6002, 6003, 6016, 6099, 6103, 6103, 6108, 6109, 6112, 6121, 6155, 6157, 6160, 6169, 6176, 6263, 6272, 6314, 6320, 6389, 6400, 6428, 6432, 6443, 6448, 6459, 6470, 6509, 6512, 6516, 6528, 6571, 6576, 6601, 6608, 6617, 6656, 6683, 6688, 6750, 6752, 6780, 6783, 6793, 6800, 6809, 6823, 6823, 6912, 6987, 6992, 7001, 7019, 7027, 7040, 7155, 7168, 7223, 7232, 7241, 7245, 7293, 7376, 7378, 7380, 7414, 7424, 7654, 7676, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8204, 8205, 8255, 8256, 8276, 8276, 8305, 8305, 8319, 8319, 8336, 8348, 8400, 8412, 8417, 8417, 8421, 8432, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8473, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8505, 8508, 8511, 8517, 8521, 8526, 8526, 8544, 8584, 11264, 11310, 11312, 11358, 11360, 11492, 11499, 11507, 11520, 11557, 11559, 11559, 11565, 11565, 11568, 11623, 11631, 11631, 11647, 11670, 11680, 11686, 11688, 11694, 11696, 11702, 11704, 11710, 11712, 11718, 11720, 11726, 11728, 11734, 11736, 11742, 11744, 11775, 11823, 11823, 12293, 12295, 12321, 12335, 12337, 12341, 12344, 12348, 12353, 12438, 12441, 12442, 12445, 12447, 12449, 12538, 12540, 12543, 12549, 12589, 12593, 12686, 12704, 12730, 12784, 12799, 13312, 19893, 19968, 40908, 40960, 42124, 42192, 42237, 42240, 42508, 42512, 42539, 42560, 42607, 42612, 42621, 42623, 42647, 42655, 42737, 42775, 42783, 42786, 42888, 42891, 42894, 42896, 42899, 42912, 42922, 43000, 43047, 43072, 43123, 43136, 43204, 43216, 43225, 43232, 43255, 43259, 43259, 43264, 43309, 43312, 43347, 43360, 43388, 43392, 43456, 43471, 43481, 43520, 43574, 43584, 43597, 43600, 43609, 43616, 43638, 43642, 43643, 43648, 43714, 43739, 43741, 43744, 43759, 43762, 43766, 43777, 43782, 43785, 43790, 43793, 43798, 43808, 43814, 43816, 43822, 43968, 44010, 44012, 44013, 44016, 44025, 44032, 55203, 55216, 55238, 55243, 55291, 63744, 64109, 64112, 64217, 64256, 64262, 64275, 64279, 64285, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65024, 65039, 65056, 65062, 65075, 65076, 65101, 65103, 65136, 65140, 65142, 65276, 65296, 65305, 65313, 65338, 65343, 65343, 65345, 65370, 65382, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500,];
-    function lookupInUnicodeMap(code, map) {
-        // Bail out quickly if it couldn't possibly be in the map.
-        if (code < map[0]) {
+    ts.createNode = createNode;
+    function visitNode(cbNode, node) {
+        if (node) {
+            return cbNode(node);
+        }
+    }
+    function visitNodeArray(cbNodes, nodes) {
+        if (nodes) {
+            return cbNodes(nodes);
+        }
+    }
+    function visitEachNode(cbNode, nodes) {
+        if (nodes) {
+            for (var _i = 0, nodes_1 = nodes; _i < nodes_1.length; _i++) {
+                var node = nodes_1[_i];
+                var result = cbNode(node);
+                if (result) {
+                    return result;
+                }
+            }
+        }
+    }
+    /**
+     * Invokes a callback for each child of the given node. The 'cbNode' callback is invoked for all child nodes
+     * stored in properties. If a 'cbNodes' callback is specified, it is invoked for embedded arrays; otherwise,
+     * embedded arrays are flattened and the 'cbNode' callback is invoked for each element. If a callback returns
+     * a truthy value, iteration stops and that value is returned. Otherwise, undefined is returned.
+     *
+     * @param node a given node to visit its children
+     * @param cbNode a callback to be invoked for all child nodes
+     * @param cbNodeArray a callback to be invoked for embedded array
+     */
+    function forEachChild(node, cbNode, cbNodeArray) {
+        if (!node) {
+            return;
+        }
+        // The visitXXX functions could be written as local functions that close over the cbNode and cbNodeArray
+        // callback parameters, but that causes a closure allocation for each invocation with noticeable effects
+        // on performance.
+        var visitNodes = cbNodeArray ? visitNodeArray : visitEachNode;
+        var cbNodes = cbNodeArray || cbNode;
+        switch (node.kind) {
+            case 143 /* QualifiedName */:
+                return visitNode(cbNode, node.left) ||
+                    visitNode(cbNode, node.right);
+            case 145 /* TypeParameter */:
+                return visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.constraint) ||
+                    visitNode(cbNode, node.default) ||
+                    visitNode(cbNode, node.expression);
+            case 262 /* ShorthandPropertyAssignment */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.questionToken) ||
+                    visitNode(cbNode, node.equalsToken) ||
+                    visitNode(cbNode, node.objectAssignmentInitializer);
+            case 263 /* SpreadAssignment */:
+                return visitNode(cbNode, node.expression);
+            case 146 /* Parameter */:
+            case 149 /* PropertyDeclaration */:
+            case 148 /* PropertySignature */:
+            case 261 /* PropertyAssignment */:
+            case 226 /* VariableDeclaration */:
+            case 176 /* BindingElement */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.propertyName) ||
+                    visitNode(cbNode, node.dotDotDotToken) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.questionToken) ||
+                    visitNode(cbNode, node.type) ||
+                    visitNode(cbNode, node.initializer);
+            case 160 /* FunctionType */:
+            case 161 /* ConstructorType */:
+            case 155 /* CallSignature */:
+            case 156 /* ConstructSignature */:
+            case 157 /* IndexSignature */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNodes(cbNodes, node.typeParameters) ||
+                    visitNodes(cbNodes, node.parameters) ||
+                    visitNode(cbNode, node.type);
+            case 151 /* MethodDeclaration */:
+            case 150 /* MethodSignature */:
+            case 152 /* Constructor */:
+            case 153 /* GetAccessor */:
+            case 154 /* SetAccessor */:
+            case 186 /* FunctionExpression */:
+            case 228 /* FunctionDeclaration */:
+            case 187 /* ArrowFunction */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.asteriskToken) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.questionToken) ||
+                    visitNodes(cbNodes, node.typeParameters) ||
+                    visitNodes(cbNodes, node.parameters) ||
+                    visitNode(cbNode, node.type) ||
+                    visitNode(cbNode, node.equalsGreaterThanToken) ||
+                    visitNode(cbNode, node.body);
+            case 159 /* TypeReference */:
+                return visitNode(cbNode, node.typeName) ||
+                    visitNodes(cbNodes, node.typeArguments);
+            case 158 /* TypePredicate */:
+                return visitNode(cbNode, node.parameterName) ||
+                    visitNode(cbNode, node.type);
+            case 162 /* TypeQuery */:
+                return visitNode(cbNode, node.exprName);
+            case 163 /* TypeLiteral */:
+                return visitNodes(cbNodes, node.members);
+            case 164 /* ArrayType */:
+                return visitNode(cbNode, node.elementType);
+            case 165 /* TupleType */:
+                return visitNodes(cbNodes, node.elementTypes);
+            case 166 /* UnionType */:
+            case 167 /* IntersectionType */:
+                return visitNodes(cbNodes, node.types);
+            case 168 /* ParenthesizedType */:
+            case 170 /* TypeOperator */:
+                return visitNode(cbNode, node.type);
+            case 171 /* IndexedAccessType */:
+                return visitNode(cbNode, node.objectType) ||
+                    visitNode(cbNode, node.indexType);
+            case 172 /* MappedType */:
+                return visitNode(cbNode, node.readonlyToken) ||
+                    visitNode(cbNode, node.typeParameter) ||
+                    visitNode(cbNode, node.questionToken) ||
+                    visitNode(cbNode, node.type);
+            case 173 /* LiteralType */:
+                return visitNode(cbNode, node.literal);
+            case 174 /* ObjectBindingPattern */:
+            case 175 /* ArrayBindingPattern */:
+                return visitNodes(cbNodes, node.elements);
+            case 177 /* ArrayLiteralExpression */:
+                return visitNodes(cbNodes, node.elements);
+            case 178 /* ObjectLiteralExpression */:
+                return visitNodes(cbNodes, node.properties);
+            case 179 /* PropertyAccessExpression */:
+                return visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.name);
+            case 180 /* ElementAccessExpression */:
+                return visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.argumentExpression);
+            case 181 /* CallExpression */:
+            case 182 /* NewExpression */:
+                return visitNode(cbNode, node.expression) ||
+                    visitNodes(cbNodes, node.typeArguments) ||
+                    visitNodes(cbNodes, node.arguments);
+            case 183 /* TaggedTemplateExpression */:
+                return visitNode(cbNode, node.tag) ||
+                    visitNode(cbNode, node.template);
+            case 184 /* TypeAssertionExpression */:
+                return visitNode(cbNode, node.type) ||
+                    visitNode(cbNode, node.expression);
+            case 185 /* ParenthesizedExpression */:
+                return visitNode(cbNode, node.expression);
+            case 188 /* DeleteExpression */:
+                return visitNode(cbNode, node.expression);
+            case 189 /* TypeOfExpression */:
+                return visitNode(cbNode, node.expression);
+            case 190 /* VoidExpression */:
+                return visitNode(cbNode, node.expression);
+            case 192 /* PrefixUnaryExpression */:
+                return visitNode(cbNode, node.operand);
+            case 197 /* YieldExpression */:
+                return visitNode(cbNode, node.asteriskToken) ||
+                    visitNode(cbNode, node.expression);
+            case 191 /* AwaitExpression */:
+                return visitNode(cbNode, node.expression);
+            case 193 /* PostfixUnaryExpression */:
+                return visitNode(cbNode, node.operand);
+            case 194 /* BinaryExpression */:
+                return visitNode(cbNode, node.left) ||
+                    visitNode(cbNode, node.operatorToken) ||
+                    visitNode(cbNode, node.right);
+            case 202 /* AsExpression */:
+                return visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.type);
+            case 203 /* NonNullExpression */:
+                return visitNode(cbNode, node.expression);
+            case 204 /* MetaProperty */:
+                return visitNode(cbNode, node.name);
+            case 195 /* ConditionalExpression */:
+                return visitNode(cbNode, node.condition) ||
+                    visitNode(cbNode, node.questionToken) ||
+                    visitNode(cbNode, node.whenTrue) ||
+                    visitNode(cbNode, node.colonToken) ||
+                    visitNode(cbNode, node.whenFalse);
+            case 198 /* SpreadElement */:
+                return visitNode(cbNode, node.expression);
+            case 207 /* Block */:
+            case 234 /* ModuleBlock */:
+                return visitNodes(cbNodes, node.statements);
+            case 265 /* SourceFile */:
+                return visitNodes(cbNodes, node.statements) ||
+                    visitNode(cbNode, node.endOfFileToken);
+            case 208 /* VariableStatement */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.declarationList);
+            case 227 /* VariableDeclarationList */:
+                return visitNodes(cbNodes, node.declarations);
+            case 210 /* ExpressionStatement */:
+                return visitNode(cbNode, node.expression);
+            case 211 /* IfStatement */:
+                return visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.thenStatement) ||
+                    visitNode(cbNode, node.elseStatement);
+            case 212 /* DoStatement */:
+                return visitNode(cbNode, node.statement) ||
+                    visitNode(cbNode, node.expression);
+            case 213 /* WhileStatement */:
+                return visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.statement);
+            case 214 /* ForStatement */:
+                return visitNode(cbNode, node.initializer) ||
+                    visitNode(cbNode, node.condition) ||
+                    visitNode(cbNode, node.incrementor) ||
+                    visitNode(cbNode, node.statement);
+            case 215 /* ForInStatement */:
+                return visitNode(cbNode, node.initializer) ||
+                    visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.statement);
+            case 216 /* ForOfStatement */:
+                return visitNode(cbNode, node.awaitModifier) ||
+                    visitNode(cbNode, node.initializer) ||
+                    visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.statement);
+            case 217 /* ContinueStatement */:
+            case 218 /* BreakStatement */:
+                return visitNode(cbNode, node.label);
+            case 219 /* ReturnStatement */:
+                return visitNode(cbNode, node.expression);
+            case 220 /* WithStatement */:
+                return visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.statement);
+            case 221 /* SwitchStatement */:
+                return visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.caseBlock);
+            case 235 /* CaseBlock */:
+                return visitNodes(cbNodes, node.clauses);
+            case 257 /* CaseClause */:
+                return visitNode(cbNode, node.expression) ||
+                    visitNodes(cbNodes, node.statements);
+            case 258 /* DefaultClause */:
+                return visitNodes(cbNodes, node.statements);
+            case 222 /* LabeledStatement */:
+                return visitNode(cbNode, node.label) ||
+                    visitNode(cbNode, node.statement);
+            case 223 /* ThrowStatement */:
+                return visitNode(cbNode, node.expression);
+            case 224 /* TryStatement */:
+                return visitNode(cbNode, node.tryBlock) ||
+                    visitNode(cbNode, node.catchClause) ||
+                    visitNode(cbNode, node.finallyBlock);
+            case 260 /* CatchClause */:
+                return visitNode(cbNode, node.variableDeclaration) ||
+                    visitNode(cbNode, node.block);
+            case 147 /* Decorator */:
+                return visitNode(cbNode, node.expression);
+            case 229 /* ClassDeclaration */:
+            case 199 /* ClassExpression */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNodes(cbNodes, node.typeParameters) ||
+                    visitNodes(cbNodes, node.heritageClauses) ||
+                    visitNodes(cbNodes, node.members);
+            case 230 /* InterfaceDeclaration */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNodes(cbNodes, node.typeParameters) ||
+                    visitNodes(cbNodes, node.heritageClauses) ||
+                    visitNodes(cbNodes, node.members);
+            case 231 /* TypeAliasDeclaration */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNodes(cbNodes, node.typeParameters) ||
+                    visitNode(cbNode, node.type);
+            case 232 /* EnumDeclaration */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNodes(cbNodes, node.members);
+            case 264 /* EnumMember */:
+                return visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.initializer);
+            case 233 /* ModuleDeclaration */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.body);
+            case 237 /* ImportEqualsDeclaration */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.moduleReference);
+            case 238 /* ImportDeclaration */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.importClause) ||
+                    visitNode(cbNode, node.moduleSpecifier);
+            case 239 /* ImportClause */:
+                return visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.namedBindings);
+            case 236 /* NamespaceExportDeclaration */:
+                return visitNode(cbNode, node.name);
+            case 240 /* NamespaceImport */:
+                return visitNode(cbNode, node.name);
+            case 241 /* NamedImports */:
+            case 245 /* NamedExports */:
+                return visitNodes(cbNodes, node.elements);
+            case 244 /* ExportDeclaration */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.exportClause) ||
+                    visitNode(cbNode, node.moduleSpecifier);
+            case 242 /* ImportSpecifier */:
+            case 246 /* ExportSpecifier */:
+                return visitNode(cbNode, node.propertyName) ||
+                    visitNode(cbNode, node.name);
+            case 243 /* ExportAssignment */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.expression);
+            case 196 /* TemplateExpression */:
+                return visitNode(cbNode, node.head) || visitNodes(cbNodes, node.templateSpans);
+            case 205 /* TemplateSpan */:
+                return visitNode(cbNode, node.expression) || visitNode(cbNode, node.literal);
+            case 144 /* ComputedPropertyName */:
+                return visitNode(cbNode, node.expression);
+            case 259 /* HeritageClause */:
+                return visitNodes(cbNodes, node.types);
+            case 201 /* ExpressionWithTypeArguments */:
+                return visitNode(cbNode, node.expression) ||
+                    visitNodes(cbNodes, node.typeArguments);
+            case 248 /* ExternalModuleReference */:
+                return visitNode(cbNode, node.expression);
+            case 247 /* MissingDeclaration */:
+                return visitNodes(cbNodes, node.decorators);
+            case 298 /* CommaListExpression */:
+                return visitNodes(cbNodes, node.elements);
+            case 249 /* JsxElement */:
+                return visitNode(cbNode, node.openingElement) ||
+                    visitNodes(cbNodes, node.children) ||
+                    visitNode(cbNode, node.closingElement);
+            case 250 /* JsxSelfClosingElement */:
+            case 251 /* JsxOpeningElement */:
+                return visitNode(cbNode, node.tagName) ||
+                    visitNode(cbNode, node.attributes);
+            case 254 /* JsxAttributes */:
+                return visitNodes(cbNodes, node.properties);
+            case 253 /* JsxAttribute */:
+                return visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.initializer);
+            case 255 /* JsxSpreadAttribute */:
+                return visitNode(cbNode, node.expression);
+            case 256 /* JsxExpression */:
+                return visitNode(cbNode, node.dotDotDotToken) ||
+                    visitNode(cbNode, node.expression);
+            case 252 /* JsxClosingElement */:
+                return visitNode(cbNode, node.tagName);
+            case 267 /* JSDocTypeExpression */:
+                return visitNode(cbNode, node.type);
+            case 271 /* JSDocUnionType */:
+                return visitNodes(cbNodes, node.types);
+            case 272 /* JSDocTupleType */:
+                return visitNodes(cbNodes, node.types);
+            case 270 /* JSDocArrayType */:
+                return visitNode(cbNode, node.elementType);
+            case 274 /* JSDocNonNullableType */:
+                return visitNode(cbNode, node.type);
+            case 273 /* JSDocNullableType */:
+                return visitNode(cbNode, node.type);
+            case 275 /* JSDocRecordType */:
+                return visitNode(cbNode, node.literal);
+            case 277 /* JSDocTypeReference */:
+                return visitNode(cbNode, node.name) ||
+                    visitNodes(cbNodes, node.typeArguments);
+            case 278 /* JSDocOptionalType */:
+                return visitNode(cbNode, node.type);
+            case 279 /* JSDocFunctionType */:
+                return visitNodes(cbNodes, node.parameters) ||
+                    visitNode(cbNode, node.type);
+            case 280 /* JSDocVariadicType */:
+                return visitNode(cbNode, node.type);
+            case 281 /* JSDocConstructorType */:
+                return visitNode(cbNode, node.type);
+            case 282 /* JSDocThisType */:
+                return visitNode(cbNode, node.type);
+            case 276 /* JSDocRecordMember */:
+                return visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.type);
+            case 283 /* JSDocComment */:
+                return visitNodes(cbNodes, node.tags);
+            case 287 /* JSDocParameterTag */:
+                return visitNode(cbNode, node.preParameterName) ||
+                    visitNode(cbNode, node.typeExpression) ||
+                    visitNode(cbNode, node.postParameterName);
+            case 288 /* JSDocReturnTag */:
+                return visitNode(cbNode, node.typeExpression);
+            case 289 /* JSDocTypeTag */:
+                return visitNode(cbNode, node.typeExpression);
+            case 285 /* JSDocAugmentsTag */:
+                return visitNode(cbNode, node.typeExpression);
+            case 290 /* JSDocTemplateTag */:
+                return visitNodes(cbNodes, node.typeParameters);
+            case 291 /* JSDocTypedefTag */:
+                return visitNode(cbNode, node.typeExpression) ||
+                    visitNode(cbNode, node.fullName) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.jsDocTypeLiteral);
+            case 293 /* JSDocTypeLiteral */:
+                return visitNodes(cbNodes, node.jsDocPropertyTags);
+            case 292 /* JSDocPropertyTag */:
+                return visitNode(cbNode, node.typeExpression) ||
+                    visitNode(cbNode, node.name);
+            case 297 /* PartiallyEmittedExpression */:
+                return visitNode(cbNode, node.expression);
+            case 294 /* JSDocLiteralType */:
+                return visitNode(cbNode, node.literal);
+        }
+    }
+    ts.forEachChild = forEachChild;
+    function createSourceFile(fileName, sourceText, languageVersion, setParentNodes, scriptKind) {
+        if (setParentNodes === void 0) { setParentNodes = false; }
+        ts.performance.mark("beforeParse");
+        var result = Parser.parseSourceFile(fileName, sourceText, languageVersion, /*syntaxCursor*/ undefined, setParentNodes, scriptKind);
+        ts.performance.mark("afterParse");
+        ts.performance.measure("Parse", "beforeParse", "afterParse");
+        return result;
+    }
+    ts.createSourceFile = createSourceFile;
+    function parseIsolatedEntityName(text, languageVersion) {
+        return Parser.parseIsolatedEntityName(text, languageVersion);
+    }
+    ts.parseIsolatedEntityName = parseIsolatedEntityName;
+    /**
+     * Parse json text into SyntaxTree and return node and parse errors if any
+     * @param fileName
+     * @param sourceText
+     */
+    function parseJsonText(fileName, sourceText) {
+        return Parser.parseJsonText(fileName, sourceText);
+    }
+    ts.parseJsonText = parseJsonText;
+    // See also `isExternalOrCommonJsModule` in utilities.ts
+    function isExternalModule(file) {
+        return file.externalModuleIndicator !== undefined;
+    }
+    ts.isExternalModule = isExternalModule;
+    // Produces a new SourceFile for the 'newText' provided. The 'textChangeRange' parameter
+    // indicates what changed between the 'text' that this SourceFile has and the 'newText'.
+    // The SourceFile will be created with the compiler attempting to reuse as many nodes from
+    // this file as possible.
+    //
+    // Note: this function mutates nodes from this SourceFile. That means any existing nodes
+    // from this SourceFile that are being held onto may change as a result (including
+    // becoming detached from any SourceFile).  It is recommended that this SourceFile not
+    // be used once 'update' is called on it.
+    function updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks) {
+        var newSourceFile = IncrementalParser.updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks);
+        // Because new source file node is created, it may not have the flag PossiblyContainDynamicImport. This is the case if there is no new edit to add dynamic import.
+        // We will manually port the flag to the new source file.
+        newSourceFile.flags |= (sourceFile.flags & 524288 /* PossiblyContainsDynamicImport */);
+        return newSourceFile;
+    }
+    ts.updateSourceFile = updateSourceFile;
+    /* @internal */
+    function parseIsolatedJSDocComment(content, start, length) {
+        var result = Parser.JSDocParser.parseIsolatedJSDocComment(content, start, length);
+        if (result && result.jsDoc) {
+            // because the jsDocComment was parsed out of the source file, it might
+            // not be covered by the fixupParentReferences.
+            Parser.fixupParentReferences(result.jsDoc);
+        }
+        return result;
+    }
+    ts.parseIsolatedJSDocComment = parseIsolatedJSDocComment;
+    /* @internal */
+    // Exposed only for testing.
+    function parseJSDocTypeExpressionForTests(content, start, length) {
+        return Parser.JSDocParser.parseJSDocTypeExpressionForTests(content, start, length);
+    }
+    ts.parseJSDocTypeExpressionForTests = parseJSDocTypeExpressionForTests;
+    // Implement the parser as a singleton module.  We do this for perf reasons because creating
+    // parser instances can actually be expensive enough to impact us on projects with many source
+    // files.
+    var Parser;
+    (function (Parser) {
+        // Share a single scanner across all calls to parse a source file.  This helps speed things
+        // up by avoiding the cost of creating/compiling scanners over and over again.
+        var scanner = ts.createScanner(5 /* Latest */, /*skipTrivia*/ true);
+        var disallowInAndDecoratorContext = 2048 /* DisallowInContext */ | 8192 /* DecoratorContext */;
+        // capture constructors in 'initializeState' to avoid null checks
+        var NodeConstructor;
+        var TokenConstructor;
+        var IdentifierConstructor;
+        var SourceFileConstructor;
+        var sourceFile;
+        var parseDiagnostics;
+        var syntaxCursor;
+        var currentToken;
+        var sourceText;
+        var nodeCount;
+        var identifiers;
+        var identifierCount;
+        var parsingContext;
+        // Flags that dictate what parsing context we're in.  For example:
+        // Whether or not we are in strict parsing mode.  All that changes in strict parsing mode is
+        // that some tokens that would be considered identifiers may be considered keywords.
+        //
+        // When adding more parser context flags, consider which is the more common case that the
+        // flag will be in.  This should be the 'false' state for that flag.  The reason for this is
+        // that we don't store data in our nodes unless the value is in the *non-default* state.  So,
+        // for example, more often than code 'allows-in' (or doesn't 'disallow-in').  We opt for
+        // 'disallow-in' set to 'false'.  Otherwise, if we had 'allowsIn' set to 'true', then almost
+        // all nodes would need extra state on them to store this info.
+        //
+        // Note:  'allowIn' and 'allowYield' track 1:1 with the [in] and [yield] concepts in the ES6
+        // grammar specification.
+        //
+        // An important thing about these context concepts.  By default they are effectively inherited
+        // while parsing through every grammar production.  i.e. if you don't change them, then when
+        // you parse a sub-production, it will have the same context values as the parent production.
+        // This is great most of the time.  After all, consider all the 'expression' grammar productions
+        // and how nearly all of them pass along the 'in' and 'yield' context values:
+        //
+        // EqualityExpression[In, Yield] :
+        //      RelationalExpression[?In, ?Yield]
+        //      EqualityExpression[?In, ?Yield] == RelationalExpression[?In, ?Yield]
+        //      EqualityExpression[?In, ?Yield] != RelationalExpression[?In, ?Yield]
+        //      EqualityExpression[?In, ?Yield] === RelationalExpression[?In, ?Yield]
+        //      EqualityExpression[?In, ?Yield] !== RelationalExpression[?In, ?Yield]
+        //
+        // Where you have to be careful is then understanding what the points are in the grammar
+        // where the values are *not* passed along.  For example:
+        //
+        // SingleNameBinding[Yield,GeneratorParameter]
+        //      [+GeneratorParameter]BindingIdentifier[Yield] Initializer[In]opt
+        //      [~GeneratorParameter]BindingIdentifier[?Yield]Initializer[In, ?Yield]opt
+        //
+        // Here this is saying that if the GeneratorParameter context flag is set, that we should
+        // explicitly set the 'yield' context flag to false before calling into the BindingIdentifier
+        // and we should explicitly unset the 'yield' context flag before calling into the Initializer.
+        // production.  Conversely, if the GeneratorParameter context flag is not set, then we
+        // should leave the 'yield' context flag alone.
+        //
+        // Getting this all correct is tricky and requires careful reading of the grammar to
+        // understand when these values should be changed versus when they should be inherited.
+        //
+        // Note: it should not be necessary to save/restore these flags during speculative/lookahead
+        // parsing.  These context flags are naturally stored and restored through normal recursive
+        // descent parsing and unwinding.
+        var contextFlags;
+        // Whether or not we've had a parse error since creating the last AST node.  If we have
+        // encountered an error, it will be stored on the next AST node we create.  Parse errors
+        // can be broken down into three categories:
+        //
+        // 1) An error that occurred during scanning.  For example, an unterminated literal, or a
+        //    character that was completely not understood.
+        //
+        // 2) A token was expected, but was not present.  This type of error is commonly produced
+        //    by the 'parseExpected' function.
+        //
+        // 3) A token was present that no parsing function was able to consume.  This type of error
+        //    only occurs in the 'abortParsingListOrMoveToNextToken' function when the parser
+        //    decides to skip the token.
+        //
+        // In all of these cases, we want to mark the next node as having had an error before it.
+        // With this mark, we can know in incremental settings if this node can be reused, or if
+        // we have to reparse it.  If we don't keep this information around, we may just reuse the
+        // node.  in that event we would then not produce the same errors as we did before, causing
+        // significant confusion problems.
+        //
+        // Note: it is necessary that this value be saved/restored during speculative/lookahead
+        // parsing.  During lookahead parsing, we will often create a node.  That node will have
+        // this value attached, and then this value will be set back to 'false'.  If we decide to
+        // rewind, we must get back to the same value we had prior to the lookahead.
+        //
+        // Note: any errors at the end of the file that do not precede a regular node, should get
+        // attached to the EOF token.
+        var parseErrorBeforeNextFinishedNode = false;
+        function parseSourceFile(fileName, sourceText, languageVersion, syntaxCursor, setParentNodes, scriptKind) {
+            scriptKind = ts.ensureScriptKind(fileName, scriptKind);
+            initializeState(sourceText, languageVersion, syntaxCursor, scriptKind);
+            var result = parseSourceFileWorker(fileName, languageVersion, setParentNodes, scriptKind);
+            clearState();
+            return result;
+        }
+        Parser.parseSourceFile = parseSourceFile;
+        function parseIsolatedEntityName(content, languageVersion) {
+            initializeState(content, languageVersion, /*syntaxCursor*/ undefined, 1 /* JS */);
+            // Prime the scanner.
+            nextToken();
+            var entityName = parseEntityName(/*allowReservedWords*/ true);
+            var isInvalid = token() === 1 /* EndOfFileToken */ && !parseDiagnostics.length;
+            clearState();
+            return isInvalid ? entityName : undefined;
+        }
+        Parser.parseIsolatedEntityName = parseIsolatedEntityName;
+        function parseJsonText(fileName, sourceText) {
+            initializeState(sourceText, 2 /* ES2015 */, /*syntaxCursor*/ undefined, 6 /* JSON */);
+            // Set source file so that errors will be reported with this file name
+            sourceFile = createSourceFile(fileName, 2 /* ES2015 */, 6 /* JSON */);
+            var result = sourceFile;
+            // Prime the scanner.
+            nextToken();
+            if (token() === 1 /* EndOfFileToken */) {
+                sourceFile.endOfFileToken = parseTokenNode();
+            }
+            else if (token() === 17 /* OpenBraceToken */ ||
+                lookAhead(function () { return token() === 9 /* StringLiteral */; })) {
+                result.jsonObject = parseObjectLiteralExpression();
+                sourceFile.endOfFileToken = parseExpectedToken(1 /* EndOfFileToken */, /*reportAtCurrentPosition*/ false, ts.Diagnostics.Unexpected_token);
+            }
+            else {
+                parseExpected(17 /* OpenBraceToken */);
+            }
+            sourceFile.parseDiagnostics = parseDiagnostics;
+            clearState();
+            return result;
+        }
+        Parser.parseJsonText = parseJsonText;
+        function getLanguageVariant(scriptKind) {
+            // .tsx and .jsx files are treated as jsx language variant.
+            return scriptKind === 4 /* TSX */ || scriptKind === 2 /* JSX */ || scriptKind === 1 /* JS */ || scriptKind === 6 /* JSON */ ? 1 /* JSX */ : 0 /* Standard */;
+        }
+        function initializeState(_sourceText, languageVersion, _syntaxCursor, scriptKind) {
+            NodeConstructor = ts.objectAllocator.getNodeConstructor();
+            TokenConstructor = ts.objectAllocator.getTokenConstructor();
+            IdentifierConstructor = ts.objectAllocator.getIdentifierConstructor();
+            SourceFileConstructor = ts.objectAllocator.getSourceFileConstructor();
+            sourceText = _sourceText;
+            syntaxCursor = _syntaxCursor;
+            parseDiagnostics = [];
+            parsingContext = 0;
+            identifiers = ts.createMap();
+            identifierCount = 0;
+            nodeCount = 0;
+            contextFlags = scriptKind === 1 /* JS */ || scriptKind === 2 /* JSX */ || scriptKind === 6 /* JSON */ ? 65536 /* JavaScriptFile */ : 0 /* None */;
+            parseErrorBeforeNextFinishedNode = false;
+            // Initialize and prime the scanner before parsing the source elements.
+            scanner.setText(sourceText);
+            scanner.setOnError(scanError);
+            scanner.setScriptTarget(languageVersion);
+            scanner.setLanguageVariant(getLanguageVariant(scriptKind));
+        }
+        function clearState() {
+            // Clear out the text the scanner is pointing at, so it doesn't keep anything alive unnecessarily.
+            scanner.setText("");
+            scanner.setOnError(undefined);
+            // Clear any data.  We don't want to accidentally hold onto it for too long.
+            parseDiagnostics = undefined;
+            sourceFile = undefined;
+            identifiers = undefined;
+            syntaxCursor = undefined;
+            sourceText = undefined;
+        }
+        function parseSourceFileWorker(fileName, languageVersion, setParentNodes, scriptKind) {
+            sourceFile = createSourceFile(fileName, languageVersion, scriptKind);
+            sourceFile.flags = contextFlags;
+            // Prime the scanner.
+            nextToken();
+            processReferenceComments(sourceFile);
+            sourceFile.statements = parseList(0 /* SourceElements */, parseStatement);
+            ts.Debug.assert(token() === 1 /* EndOfFileToken */);
+            sourceFile.endOfFileToken = addJSDocComment(parseTokenNode());
+            setExternalModuleIndicator(sourceFile);
+            sourceFile.nodeCount = nodeCount;
+            sourceFile.identifierCount = identifierCount;
+            sourceFile.identifiers = identifiers;
+            sourceFile.parseDiagnostics = parseDiagnostics;
+            if (setParentNodes) {
+                fixupParentReferences(sourceFile);
+            }
+            return sourceFile;
+        }
+        function addJSDocComment(node) {
+            var comments = ts.getJSDocCommentRanges(node, sourceFile.text);
+            if (comments) {
+                for (var _i = 0, comments_2 = comments; _i < comments_2.length; _i++) {
+                    var comment = comments_2[_i];
+                    var jsDoc = JSDocParser.parseJSDocComment(node, comment.pos, comment.end - comment.pos);
+                    if (!jsDoc) {
+                        continue;
+                    }
+                    if (!node.jsDoc) {
+                        node.jsDoc = [];
+                    }
+                    node.jsDoc.push(jsDoc);
+                }
+            }
+            return node;
+        }
+        function fixupParentReferences(rootNode) {
+            // normally parent references are set during binding. However, for clients that only need
+            // a syntax tree, and no semantic features, then the binding process is an unnecessary
+            // overhead.  This functions allows us to set all the parents, without all the expense of
+            // binding.
+            var parent = rootNode;
+            forEachChild(rootNode, visitNode);
+            return;
+            function visitNode(n) {
+                // walk down setting parents that differ from the parent we think it should be.  This
+                // allows us to quickly bail out of setting parents for subtrees during incremental
+                // parsing
+                if (n.parent !== parent) {
+                    n.parent = parent;
+                    var saveParent = parent;
+                    parent = n;
+                    forEachChild(n, visitNode);
+                    if (n.jsDoc) {
+                        for (var _i = 0, _a = n.jsDoc; _i < _a.length; _i++) {
+                            var jsDoc = _a[_i];
+                            jsDoc.parent = n;
+                            parent = jsDoc;
+                            forEachChild(jsDoc, visitNode);
+                        }
+                    }
+                    parent = saveParent;
+                }
+            }
+        }
+        Parser.fixupParentReferences = fixupParentReferences;
+        function createSourceFile(fileName, languageVersion, scriptKind) {
+            // code from createNode is inlined here so createNode won't have to deal with special case of creating source files
+            // this is quite rare comparing to other nodes and createNode should be as fast as possible
+            var sourceFile = new SourceFileConstructor(265 /* SourceFile */, /*pos*/ 0, /* end */ sourceText.length);
+            nodeCount++;
+            sourceFile.text = sourceText;
+            sourceFile.bindDiagnostics = [];
+            sourceFile.languageVersion = languageVersion;
+            sourceFile.fileName = ts.normalizePath(fileName);
+            sourceFile.languageVariant = getLanguageVariant(scriptKind);
+            sourceFile.isDeclarationFile = ts.fileExtensionIs(sourceFile.fileName, ".d.ts" /* Dts */);
+            sourceFile.scriptKind = scriptKind;
+            return sourceFile;
+        }
+        function setContextFlag(val, flag) {
+            if (val) {
+                contextFlags |= flag;
+            }
+            else {
+                contextFlags &= ~flag;
+            }
+        }
+        function setDisallowInContext(val) {
+            setContextFlag(val, 2048 /* DisallowInContext */);
+        }
+        function setYieldContext(val) {
+            setContextFlag(val, 4096 /* YieldContext */);
+        }
+        function setDecoratorContext(val) {
+            setContextFlag(val, 8192 /* DecoratorContext */);
+        }
+        function setAwaitContext(val) {
+            setContextFlag(val, 16384 /* AwaitContext */);
+        }
+        function doOutsideOfContext(context, func) {
+            // contextFlagsToClear will contain only the context flags that are
+            // currently set that we need to temporarily clear
+            // We don't just blindly reset to the previous flags to ensure
+            // that we do not mutate cached flags for the incremental
+            // parser (ThisNodeHasError, ThisNodeOrAnySubNodesHasError, and
+            // HasAggregatedChildData).
+            var contextFlagsToClear = context & contextFlags;
+            if (contextFlagsToClear) {
+                // clear the requested context flags
+                setContextFlag(/*val*/ false, contextFlagsToClear);
+                var result = func();
+                // restore the context flags we just cleared
+                setContextFlag(/*val*/ true, contextFlagsToClear);
+                return result;
+            }
+            // no need to do anything special as we are not in any of the requested contexts
+            return func();
+        }
+        function doInsideOfContext(context, func) {
+            // contextFlagsToSet will contain only the context flags that
+            // are not currently set that we need to temporarily enable.
+            // We don't just blindly reset to the previous flags to ensure
+            // that we do not mutate cached flags for the incremental
+            // parser (ThisNodeHasError, ThisNodeOrAnySubNodesHasError, and
+            // HasAggregatedChildData).
+            var contextFlagsToSet = context & ~contextFlags;
+            if (contextFlagsToSet) {
+                // set the requested context flags
+                setContextFlag(/*val*/ true, contextFlagsToSet);
+                var result = func();
+                // reset the context flags we just set
+                setContextFlag(/*val*/ false, contextFlagsToSet);
+                return result;
+            }
+            // no need to do anything special as we are already in all of the requested contexts
+            return func();
+        }
+        function allowInAnd(func) {
+            return doOutsideOfContext(2048 /* DisallowInContext */, func);
+        }
+        function disallowInAnd(func) {
+            return doInsideOfContext(2048 /* DisallowInContext */, func);
+        }
+        function doInYieldContext(func) {
+            return doInsideOfContext(4096 /* YieldContext */, func);
+        }
+        function doInDecoratorContext(func) {
+            return doInsideOfContext(8192 /* DecoratorContext */, func);
+        }
+        function doInAwaitContext(func) {
+            return doInsideOfContext(16384 /* AwaitContext */, func);
+        }
+        function doOutsideOfAwaitContext(func) {
+            return doOutsideOfContext(16384 /* AwaitContext */, func);
+        }
+        function doInYieldAndAwaitContext(func) {
+            return doInsideOfContext(4096 /* YieldContext */ | 16384 /* AwaitContext */, func);
+        }
+        function inContext(flags) {
+            return (contextFlags & flags) !== 0;
+        }
+        function inYieldContext() {
+            return inContext(4096 /* YieldContext */);
+        }
+        function inDisallowInContext() {
+            return inContext(2048 /* DisallowInContext */);
+        }
+        function inDecoratorContext() {
+            return inContext(8192 /* DecoratorContext */);
+        }
+        function inAwaitContext() {
+            return inContext(16384 /* AwaitContext */);
+        }
+        function parseErrorAtCurrentToken(message, arg0) {
+            var start = scanner.getTokenPos();
+            var length = scanner.getTextPos() - start;
+            parseErrorAtPosition(start, length, message, arg0);
+        }
+        function parseErrorAtPosition(start, length, message, arg0) {
+            // Don't report another error if it would just be at the same position as the last error.
+            var lastError = ts.lastOrUndefined(parseDiagnostics);
+            if (!lastError || start !== lastError.start) {
+                parseDiagnostics.push(ts.createFileDiagnostic(sourceFile, start, length, message, arg0));
+            }
+            // Mark that we've encountered an error.  We'll set an appropriate bit on the next
+            // node we finish so that it can't be reused incrementally.
+            parseErrorBeforeNextFinishedNode = true;
+        }
+        function scanError(message, length) {
+            var pos = scanner.getTextPos();
+            parseErrorAtPosition(pos, length || 0, message);
+        }
+        function getNodePos() {
+            return scanner.getStartPos();
+        }
+        function getNodeEnd() {
+            return scanner.getStartPos();
+        }
+        // Use this function to access the current token instead of reading the currentToken
+        // variable. Since function results aren't narrowed in control flow analysis, this ensures
+        // that the type checker doesn't make wrong assumptions about the type of the current
+        // token (e.g. a call to nextToken() changes the current token but the checker doesn't
+        // reason about this side effect).  Mainstream VMs inline simple functions like this, so
+        // there is no performance penalty.
+        function token() {
+            return currentToken;
+        }
+        function nextToken() {
+            return currentToken = scanner.scan();
+        }
+        function reScanGreaterToken() {
+            return currentToken = scanner.reScanGreaterToken();
+        }
+        function reScanSlashToken() {
+            return currentToken = scanner.reScanSlashToken();
+        }
+        function reScanTemplateToken() {
+            return currentToken = scanner.reScanTemplateToken();
+        }
+        function scanJsxIdentifier() {
+            return currentToken = scanner.scanJsxIdentifier();
+        }
+        function scanJsxText() {
+            return currentToken = scanner.scanJsxToken();
+        }
+        function scanJsxAttributeValue() {
+            return currentToken = scanner.scanJsxAttributeValue();
+        }
+        function speculationHelper(callback, isLookAhead) {
+            // Keep track of the state we'll need to rollback to if lookahead fails (or if the
+            // caller asked us to always reset our state).
+            var saveToken = currentToken;
+            var saveParseDiagnosticsLength = parseDiagnostics.length;
+            var saveParseErrorBeforeNextFinishedNode = parseErrorBeforeNextFinishedNode;
+            // Note: it is not actually necessary to save/restore the context flags here.  That's
+            // because the saving/restoring of these flags happens naturally through the recursive
+            // descent nature of our parser.  However, we still store this here just so we can
+            // assert that invariant holds.
+            var saveContextFlags = contextFlags;
+            // If we're only looking ahead, then tell the scanner to only lookahead as well.
+            // Otherwise, if we're actually speculatively parsing, then tell the scanner to do the
+            // same.
+            var result = isLookAhead
+                ? scanner.lookAhead(callback)
+                : scanner.tryScan(callback);
+            ts.Debug.assert(saveContextFlags === contextFlags);
+            // If our callback returned something 'falsy' or we're just looking ahead,
+            // then unconditionally restore us to where we were.
+            if (!result || isLookAhead) {
+                currentToken = saveToken;
+                parseDiagnostics.length = saveParseDiagnosticsLength;
+                parseErrorBeforeNextFinishedNode = saveParseErrorBeforeNextFinishedNode;
+            }
+            return result;
+        }
+        /** Invokes the provided callback then unconditionally restores the parser to the state it
+         * was in immediately prior to invoking the callback.  The result of invoking the callback
+         * is returned from this function.
+         */
+        function lookAhead(callback) {
+            return speculationHelper(callback, /*isLookAhead*/ true);
+        }
+        /** Invokes the provided callback.  If the callback returns something falsy, then it restores
+         * the parser to the state it was in immediately prior to invoking the callback.  If the
+         * callback returns something truthy, then the parser state is not rolled back.  The result
+         * of invoking the callback is returned from this function.
+         */
+        function tryParse(callback) {
+            return speculationHelper(callback, /*isLookAhead*/ false);
+        }
+        // Ignore strict mode flag because we will report an error in type checker instead.
+        function isIdentifier() {
+            if (token() === 71 /* Identifier */) {
+                return true;
+            }
+            // If we have a 'yield' keyword, and we're in the [yield] context, then 'yield' is
+            // considered a keyword and is not an identifier.
+            if (token() === 116 /* YieldKeyword */ && inYieldContext()) {
+                return false;
+            }
+            // If we have a 'await' keyword, and we're in the [Await] context, then 'await' is
+            // considered a keyword and is not an identifier.
+            if (token() === 121 /* AwaitKeyword */ && inAwaitContext()) {
+                return false;
+            }
+            return token() > 107 /* LastReservedWord */;
+        }
+        function parseExpected(kind, diagnosticMessage, shouldAdvance) {
+            if (shouldAdvance === void 0) { shouldAdvance = true; }
+            if (token() === kind) {
+                if (shouldAdvance) {
+                    nextToken();
+                }
+                return true;
+            }
+            // Report specific message if provided with one.  Otherwise, report generic fallback message.
+            if (diagnosticMessage) {
+                parseErrorAtCurrentToken(diagnosticMessage);
+            }
+            else {
+                parseErrorAtCurrentToken(ts.Diagnostics._0_expected, ts.tokenToString(kind));
+            }
             return false;
         }
-        // Perform binary search in one of the Unicode range maps
-        var lo = 0;
-        var hi = map.length;
-        var mid;
-        while (lo + 1 < hi) {
-            mid = lo + (hi - lo) / 2;
-            // mid has to be even to catch a range's beginning
-            mid -= mid % 2;
-            if (map[mid] <= code && code <= map[mid + 1]) {
+        function parseOptional(t) {
+            if (token() === t) {
+                nextToken();
                 return true;
             }
-            if (code < map[mid]) {
-                hi = mid;
+            return false;
+        }
+        function parseOptionalToken(t) {
+            if (token() === t) {
+                return parseTokenNode();
+            }
+            return undefined;
+        }
+        function parseExpectedToken(t, reportAtCurrentPosition, diagnosticMessage, arg0) {
+            return parseOptionalToken(t) ||
+                createMissingNode(t, reportAtCurrentPosition, diagnosticMessage, arg0);
+        }
+        function parseTokenNode() {
+            var node = createNode(token());
+            nextToken();
+            return finishNode(node);
+        }
+        function canParseSemicolon() {
+            // If there's a real semicolon, then we can always parse it out.
+            if (token() === 25 /* SemicolonToken */) {
+                return true;
+            }
+            // We can parse out an optional semicolon in ASI cases in the following cases.
+            return token() === 18 /* CloseBraceToken */ || token() === 1 /* EndOfFileToken */ || scanner.hasPrecedingLineBreak();
+        }
+        function parseSemicolon() {
+            if (canParseSemicolon()) {
+                if (token() === 25 /* SemicolonToken */) {
+                    // consume the semicolon if it was explicitly provided.
+                    nextToken();
+                }
+                return true;
+            }
+            else {
+                return parseExpected(25 /* SemicolonToken */);
+            }
+        }
+        // note: this function creates only node
+        function createNode(kind, pos) {
+            nodeCount++;
+            if (!(pos >= 0)) {
+                pos = scanner.getStartPos();
+            }
+            return ts.isNodeKind(kind) ? new NodeConstructor(kind, pos, pos) :
+                kind === 71 /* Identifier */ ? new IdentifierConstructor(kind, pos, pos) :
+                    new TokenConstructor(kind, pos, pos);
+        }
+        function createNodeArray(elements, pos) {
+            var array = (elements || []);
+            if (!(pos >= 0)) {
+                pos = getNodePos();
+            }
+            array.pos = pos;
+            array.end = pos;
+            return array;
+        }
+        function finishNode(node, end) {
+            node.end = end === undefined ? scanner.getStartPos() : end;
+            if (contextFlags) {
+                node.flags |= contextFlags;
+            }
+            // Keep track on the node if we encountered an error while parsing it.  If we did, then
+            // we cannot reuse the node incrementally.  Once we've marked this node, clear out the
+            // flag so that we don't mark any subsequent nodes.
+            if (parseErrorBeforeNextFinishedNode) {
+                parseErrorBeforeNextFinishedNode = false;
+                node.flags |= 32768 /* ThisNodeHasError */;
+            }
+            return node;
+        }
+        function createMissingNode(kind, reportAtCurrentPosition, diagnosticMessage, arg0) {
+            if (reportAtCurrentPosition) {
+                parseErrorAtPosition(scanner.getStartPos(), 0, diagnosticMessage, arg0);
             }
             else {
-                lo = mid + 2;
+                parseErrorAtCurrentToken(diagnosticMessage, arg0);
             }
+            var result = createNode(kind, scanner.getStartPos());
+            result.text = "";
+            return finishNode(result);
         }
-        return false;
-    }
-    /* @internal */ function isUnicodeIdentifierStart(code, languageVersion) {
-        return languageVersion >= 1 /* ES5 */ ?
-            lookupInUnicodeMap(code, unicodeES5IdentifierStart) :
-            lookupInUnicodeMap(code, unicodeES3IdentifierStart);
-    }
-    ts.isUnicodeIdentifierStart = isUnicodeIdentifierStart;
-    function isUnicodeIdentifierPart(code, languageVersion) {
-        return languageVersion >= 1 /* ES5 */ ?
-            lookupInUnicodeMap(code, unicodeES5IdentifierPart) :
-            lookupInUnicodeMap(code, unicodeES3IdentifierPart);
-    }
-    function makeReverseMap(source) {
-        var result = [];
-        for (var name_8 in source) {
-            result[source[name_8]] = name_8;
+        function internIdentifier(text) {
+            text = ts.escapeIdentifier(text);
+            var identifier = identifiers.get(text);
+            if (identifier === undefined) {
+                identifiers.set(text, identifier = text);
+            }
+            return identifier;
         }
-        return result;
-    }
-    var tokenStrings = makeReverseMap(textToToken);
-    function tokenToString(t) {
-        return tokenStrings[t];
-    }
-    ts.tokenToString = tokenToString;
-    /* @internal */
-    function stringToToken(s) {
-        return textToToken[s];
-    }
-    ts.stringToToken = stringToToken;
-    /* @internal */
-    function computeLineStarts(text) {
-        var result = new Array();
-        var pos = 0;
-        var lineStart = 0;
-        while (pos < text.length) {
-            var ch = text.charCodeAt(pos);
-            pos++;
-            switch (ch) {
-                case 13 /* carriageReturn */:
-                    if (text.charCodeAt(pos) === 10 /* lineFeed */) {
-                        pos++;
-                    }
-                case 10 /* lineFeed */:
-                    result.push(lineStart);
-                    lineStart = pos;
-                    break;
-                default:
-                    if (ch > 127 /* maxAsciiCharacter */ && isLineBreak(ch)) {
-                        result.push(lineStart);
-                        lineStart = pos;
-                    }
-                    break;
+        // An identifier that starts with two underscores has an extra underscore character prepended to it to avoid issues
+        // with magic property names like '__proto__'. The 'identifiers' object is used to share a single string instance for
+        // each identifier in order to reduce memory consumption.
+        function createIdentifier(isIdentifier, diagnosticMessage) {
+            identifierCount++;
+            if (isIdentifier) {
+                var node = createNode(71 /* Identifier */);
+                // Store original token kind if it is not just an Identifier so we can report appropriate error later in type checker
+                if (token() !== 71 /* Identifier */) {
+                    node.originalKeywordKind = token();
+                }
+                node.text = internIdentifier(scanner.getTokenValue());
+                nextToken();
+                return finishNode(node);
             }
+            return createMissingNode(71 /* Identifier */, /*reportAtCurrentPosition*/ false, diagnosticMessage || ts.Diagnostics.Identifier_expected);
         }
-        result.push(lineStart);
-        return result;
-    }
-    ts.computeLineStarts = computeLineStarts;
-    function getPositionOfLineAndCharacter(sourceFile, line, character) {
-        return computePositionOfLineAndCharacter(getLineStarts(sourceFile), line, character);
-    }
-    ts.getPositionOfLineAndCharacter = getPositionOfLineAndCharacter;
-    /* @internal */
-    function computePositionOfLineAndCharacter(lineStarts, line, character) {
-        ts.Debug.assert(line >= 0 && line < lineStarts.length);
-        return lineStarts[line] + character;
-    }
-    ts.computePositionOfLineAndCharacter = computePositionOfLineAndCharacter;
-    /* @internal */
-    function getLineStarts(sourceFile) {
-        return sourceFile.lineMap || (sourceFile.lineMap = computeLineStarts(sourceFile.text));
-    }
-    ts.getLineStarts = getLineStarts;
-    /* @internal */
-    /**
-     * We assume the first line starts at position 0 and 'position' is non-negative.
-     */
-    function computeLineAndCharacterOfPosition(lineStarts, position) {
-        var lineNumber = ts.binarySearch(lineStarts, position);
-        if (lineNumber < 0) {
-            // If the actual position was not found,
-            // the binary search returns the 2's-complement of the next line start
-            // e.g. if the line starts at [5, 10, 23, 80] and the position requested was 20
-            // then the search will return -2.
-            //
-            // We want the index of the previous line start, so we subtract 1.
-            // Review 2's-complement if this is confusing.
-            lineNumber = ~lineNumber - 1;
-            ts.Debug.assert(lineNumber !== -1, "position cannot precede the beginning of the file");
+        function parseIdentifier(diagnosticMessage) {
+            return createIdentifier(isIdentifier(), diagnosticMessage);
         }
-        return {
-            line: lineNumber,
-            character: position - lineStarts[lineNumber]
-        };
-    }
-    ts.computeLineAndCharacterOfPosition = computeLineAndCharacterOfPosition;
-    function getLineAndCharacterOfPosition(sourceFile, position) {
-        return computeLineAndCharacterOfPosition(getLineStarts(sourceFile), position);
-    }
-    ts.getLineAndCharacterOfPosition = getLineAndCharacterOfPosition;
-    var hasOwnProperty = Object.prototype.hasOwnProperty;
-    function isWhiteSpace(ch) {
-        return isWhiteSpaceSingleLine(ch) || isLineBreak(ch);
-    }
-    ts.isWhiteSpace = isWhiteSpace;
-    /** Does not include line breaks. For that, see isWhiteSpaceLike. */
-    function isWhiteSpaceSingleLine(ch) {
-        // Note: nextLine is in the Zs space, and should be considered to be a whitespace.
-        // It is explicitly not a line-break as it isn't in the exact set specified by EcmaScript.
-        return ch === 32 /* space */ ||
-            ch === 9 /* tab */ ||
-            ch === 11 /* verticalTab */ ||
-            ch === 12 /* formFeed */ ||
-            ch === 160 /* nonBreakingSpace */ ||
-            ch === 133 /* nextLine */ ||
-            ch === 5760 /* ogham */ ||
-            ch >= 8192 /* enQuad */ && ch <= 8203 /* zeroWidthSpace */ ||
-            ch === 8239 /* narrowNoBreakSpace */ ||
-            ch === 8287 /* mathematicalSpace */ ||
-            ch === 12288 /* ideographicSpace */ ||
-            ch === 65279 /* byteOrderMark */;
-    }
-    ts.isWhiteSpaceSingleLine = isWhiteSpaceSingleLine;
-    function isLineBreak(ch) {
-        // ES5 7.3:
-        // The ECMAScript line terminator characters are listed in Table 3.
-        //     Table 3: Line Terminator Characters
-        //     Code Unit Value     Name                    Formal Name
-        //     \u000A              Line Feed               <LF>
-        //     \u000D              Carriage Return         <CR>
-        //     \u2028              Line separator          <LS>
-        //     \u2029              Paragraph separator     <PS>
-        // Only the characters in Table 3 are treated as line terminators. Other new line or line
-        // breaking characters are treated as white space but not as line terminators.
-        return ch === 10 /* lineFeed */ ||
-            ch === 13 /* carriageReturn */ ||
-            ch === 8232 /* lineSeparator */ ||
-            ch === 8233 /* paragraphSeparator */;
-    }
-    ts.isLineBreak = isLineBreak;
-    function isDigit(ch) {
-        return ch >= 48 /* _0 */ && ch <= 57 /* _9 */;
-    }
-    /* @internal */
-    function isOctalDigit(ch) {
-        return ch >= 48 /* _0 */ && ch <= 55 /* _7 */;
-    }
-    ts.isOctalDigit = isOctalDigit;
-    function couldStartTrivia(text, pos) {
-        // Keep in sync with skipTrivia
-        var ch = text.charCodeAt(pos);
-        switch (ch) {
-            case 13 /* carriageReturn */:
-            case 10 /* lineFeed */:
-            case 9 /* tab */:
-            case 11 /* verticalTab */:
-            case 12 /* formFeed */:
-            case 32 /* space */:
-            case 47 /* slash */:
-            // starts of normal trivia
-            case 60 /* lessThan */:
-            case 61 /* equals */:
-            case 62 /* greaterThan */:
-                // Starts of conflict marker trivia
-                return true;
-            case 35 /* hash */:
-                // Only if its the beginning can we have #! trivia
-                return pos === 0;
-            default:
-                return ch > 127 /* maxAsciiCharacter */;
+        function parseIdentifierName() {
+            return createIdentifier(ts.tokenIsIdentifierOrKeyword(token()));
         }
-    }
-    ts.couldStartTrivia = couldStartTrivia;
-    /* @internal */
-    function skipTrivia(text, pos, stopAfterLineBreak, stopAtComments) {
-        if (stopAtComments === void 0) { stopAtComments = false; }
-        if (ts.positionIsSynthesized(pos)) {
-            return pos;
+        function isLiteralPropertyName() {
+            return ts.tokenIsIdentifierOrKeyword(token()) ||
+                token() === 9 /* StringLiteral */ ||
+                token() === 8 /* NumericLiteral */;
         }
-        // Keep in sync with couldStartTrivia
-        while (true) {
-            var ch = text.charCodeAt(pos);
-            switch (ch) {
-                case 13 /* carriageReturn */:
-                    if (text.charCodeAt(pos + 1) === 10 /* lineFeed */) {
-                        pos++;
-                    }
-                case 10 /* lineFeed */:
-                    pos++;
-                    if (stopAfterLineBreak) {
-                        return pos;
-                    }
-                    continue;
-                case 9 /* tab */:
-                case 11 /* verticalTab */:
-                case 12 /* formFeed */:
-                case 32 /* space */:
-                    pos++;
-                    continue;
-                case 47 /* slash */:
-                    if (stopAtComments) {
-                        break;
-                    }
-                    if (text.charCodeAt(pos + 1) === 47 /* slash */) {
-                        pos += 2;
-                        while (pos < text.length) {
-                            if (isLineBreak(text.charCodeAt(pos))) {
-                                break;
-                            }
-                            pos++;
-                        }
-                        continue;
-                    }
-                    if (text.charCodeAt(pos + 1) === 42 /* asterisk */) {
-                        pos += 2;
-                        while (pos < text.length) {
-                            if (text.charCodeAt(pos) === 42 /* asterisk */ && text.charCodeAt(pos + 1) === 47 /* slash */) {
-                                pos += 2;
-                                break;
-                            }
-                            pos++;
-                        }
-                        continue;
-                    }
-                    break;
-                case 60 /* lessThan */:
-                case 61 /* equals */:
-                case 62 /* greaterThan */:
-                    if (isConflictMarkerTrivia(text, pos)) {
-                        pos = scanConflictMarkerTrivia(text, pos);
-                        continue;
-                    }
-                    break;
-                case 35 /* hash */:
-                    if (pos === 0 && isShebangTrivia(text, pos)) {
-                        pos = scanShebangTrivia(text, pos);
-                        continue;
-                    }
-                    break;
-                default:
-                    if (ch > 127 /* maxAsciiCharacter */ && (isWhiteSpace(ch))) {
-                        pos++;
-                        continue;
-                    }
-                    break;
+        function parsePropertyNameWorker(allowComputedPropertyNames) {
+            if (token() === 9 /* StringLiteral */ || token() === 8 /* NumericLiteral */) {
+                return parseLiteralNode(/*internName*/ true);
             }
-            return pos;
-        }
-    }
-    ts.skipTrivia = skipTrivia;
-    // All conflict markers consist of the same character repeated seven times.  If it is
-    // a <<<<<<< or >>>>>>> marker then it is also followed by a space.
-    var mergeConflictMarkerLength = "<<<<<<<".length;
-    function isConflictMarkerTrivia(text, pos) {
-        ts.Debug.assert(pos >= 0);
-        // Conflict markers must be at the start of a line.
-        if (pos === 0 || isLineBreak(text.charCodeAt(pos - 1))) {
-            var ch = text.charCodeAt(pos);
-            if ((pos + mergeConflictMarkerLength) < text.length) {
-                for (var i = 0, n = mergeConflictMarkerLength; i < n; i++) {
-                    if (text.charCodeAt(pos + i) !== ch) {
-                        return false;
-                    }
-                }
-                return ch === 61 /* equals */ ||
-                    text.charCodeAt(pos + mergeConflictMarkerLength) === 32 /* space */;
+            if (allowComputedPropertyNames && token() === 21 /* OpenBracketToken */) {
+                return parseComputedPropertyName();
             }
+            return parseIdentifierName();
         }
-        return false;
-    }
-    function scanConflictMarkerTrivia(text, pos, error) {
-        if (error) {
-            error(ts.Diagnostics.Merge_conflict_marker_encountered, mergeConflictMarkerLength);
+        function parsePropertyName() {
+            return parsePropertyNameWorker(/*allowComputedPropertyNames*/ true);
         }
-        var ch = text.charCodeAt(pos);
-        var len = text.length;
-        if (ch === 60 /* lessThan */ || ch === 62 /* greaterThan */) {
-            while (pos < len && !isLineBreak(text.charCodeAt(pos))) {
-                pos++;
+        function parseSimplePropertyName() {
+            return parsePropertyNameWorker(/*allowComputedPropertyNames*/ false);
+        }
+        function isSimplePropertyName() {
+            return token() === 9 /* StringLiteral */ || token() === 8 /* NumericLiteral */ || ts.tokenIsIdentifierOrKeyword(token());
+        }
+        function parseComputedPropertyName() {
+            // PropertyName [Yield]:
+            //      LiteralPropertyName
+            //      ComputedPropertyName[?Yield]
+            var node = createNode(144 /* ComputedPropertyName */);
+            parseExpected(21 /* OpenBracketToken */);
+            // We parse any expression (including a comma expression). But the grammar
+            // says that only an assignment expression is allowed, so the grammar checker
+            // will error if it sees a comma expression.
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(22 /* CloseBracketToken */);
+            return finishNode(node);
+        }
+        function parseContextualModifier(t) {
+            return token() === t && tryParse(nextTokenCanFollowModifier);
+        }
+        function nextTokenIsOnSameLineAndCanFollowModifier() {
+            nextToken();
+            if (scanner.hasPrecedingLineBreak()) {
+                return false;
             }
+            return canFollowModifier();
         }
-        else {
-            ts.Debug.assert(ch === 61 /* equals */);
-            // Consume everything from the start of the mid-conflict marker to the start of the next
-            // end-conflict marker.
-            while (pos < len) {
-                var ch_1 = text.charCodeAt(pos);
-                if (ch_1 === 62 /* greaterThan */ && isConflictMarkerTrivia(text, pos)) {
-                    break;
+        function nextTokenCanFollowModifier() {
+            if (token() === 76 /* ConstKeyword */) {
+                // 'const' is only a modifier if followed by 'enum'.
+                return nextToken() === 83 /* EnumKeyword */;
+            }
+            if (token() === 84 /* ExportKeyword */) {
+                nextToken();
+                if (token() === 79 /* DefaultKeyword */) {
+                    return lookAhead(nextTokenCanFollowDefaultKeyword);
                 }
-                pos++;
+                return token() !== 39 /* AsteriskToken */ && token() !== 118 /* AsKeyword */ && token() !== 17 /* OpenBraceToken */ && canFollowModifier();
+            }
+            if (token() === 79 /* DefaultKeyword */) {
+                return nextTokenCanFollowDefaultKeyword();
+            }
+            if (token() === 115 /* StaticKeyword */) {
+                nextToken();
+                return canFollowModifier();
             }
+            return nextTokenIsOnSameLineAndCanFollowModifier();
         }
-        return pos;
-    }
-    var shebangTriviaRegex = /^#!.*/;
-    function isShebangTrivia(text, pos) {
-        // Shebangs check must only be done at the start of the file
-        ts.Debug.assert(pos === 0);
-        return shebangTriviaRegex.test(text);
-    }
-    function scanShebangTrivia(text, pos) {
-        var shebang = shebangTriviaRegex.exec(text)[0];
-        pos = pos + shebang.length;
-        return pos;
-    }
-    /**
-     * Invokes a callback for each comment range following the provided position.
-     *
-     * Single-line comment ranges include the leading double-slash characters but not the ending
-     * line break. Multi-line comment ranges include the leading slash-asterisk and trailing
-     * asterisk-slash characters.
-     *
-     * @param reduce If true, accumulates the result of calling the callback in a fashion similar
-     *      to reduceLeft. If false, iteration stops when the callback returns a truthy value.
-     * @param text The source text to scan.
-     * @param pos The position at which to start scanning.
-     * @param trailing If false, whitespace is skipped until the first line break and comments
-     *      between that location and the next token are returned. If true, comments occurring
-     *      between the given position and the next line break are returned.
-     * @param cb The callback to execute as each comment range is encountered.
-     * @param state A state value to pass to each iteration of the callback.
-     * @param initial An initial value to pass when accumulating results (when "reduce" is true).
-     * @returns If "reduce" is true, the accumulated value. If "reduce" is false, the first truthy
-     *      return value of the callback.
-     */
-    function iterateCommentRanges(reduce, text, pos, trailing, cb, state, initial) {
-        var pendingPos;
-        var pendingEnd;
-        var pendingKind;
-        var pendingHasTrailingNewLine;
-        var hasPendingCommentRange = false;
-        var collecting = trailing || pos === 0;
-        var accumulator = initial;
-        scan: while (pos >= 0 && pos < text.length) {
-            var ch = text.charCodeAt(pos);
-            switch (ch) {
-                case 13 /* carriageReturn */:
-                    if (text.charCodeAt(pos + 1) === 10 /* lineFeed */) {
-                        pos++;
-                    }
-                case 10 /* lineFeed */:
-                    pos++;
-                    if (trailing) {
-                        break scan;
-                    }
-                    collecting = true;
-                    if (hasPendingCommentRange) {
-                        pendingHasTrailingNewLine = true;
+        function parseAnyContextualModifier() {
+            return ts.isModifierKind(token()) && tryParse(nextTokenCanFollowModifier);
+        }
+        function canFollowModifier() {
+            return token() === 21 /* OpenBracketToken */
+                || token() === 17 /* OpenBraceToken */
+                || token() === 39 /* AsteriskToken */
+                || token() === 24 /* DotDotDotToken */
+                || isLiteralPropertyName();
+        }
+        function nextTokenCanFollowDefaultKeyword() {
+            nextToken();
+            return token() === 75 /* ClassKeyword */ || token() === 89 /* FunctionKeyword */ ||
+                token() === 109 /* InterfaceKeyword */ ||
+                (token() === 117 /* AbstractKeyword */ && lookAhead(nextTokenIsClassKeywordOnSameLine)) ||
+                (token() === 120 /* AsyncKeyword */ && lookAhead(nextTokenIsFunctionKeywordOnSameLine));
+        }
+        // True if positioned at the start of a list element
+        function isListElement(parsingContext, inErrorRecovery) {
+            var node = currentNode(parsingContext);
+            if (node) {
+                return true;
+            }
+            switch (parsingContext) {
+                case 0 /* SourceElements */:
+                case 1 /* BlockStatements */:
+                case 3 /* SwitchClauseStatements */:
+                    // If we're in error recovery, then we don't want to treat ';' as an empty statement.
+                    // The problem is that ';' can show up in far too many contexts, and if we see one
+                    // and assume it's a statement, then we may bail out inappropriately from whatever
+                    // we're parsing.  For example, if we have a semicolon in the middle of a class, then
+                    // we really don't want to assume the class is over and we're on a statement in the
+                    // outer module.  We just want to consume and move on.
+                    return !(token() === 25 /* SemicolonToken */ && inErrorRecovery) && isStartOfStatement();
+                case 2 /* SwitchClauses */:
+                    return token() === 73 /* CaseKeyword */ || token() === 79 /* DefaultKeyword */;
+                case 4 /* TypeMembers */:
+                    return lookAhead(isTypeMemberStart);
+                case 5 /* ClassMembers */:
+                    // We allow semicolons as class elements (as specified by ES6) as long as we're
+                    // not in error recovery.  If we're in error recovery, we don't want an errant
+                    // semicolon to be treated as a class member (since they're almost always used
+                    // for statements.
+                    return lookAhead(isClassMemberStart) || (token() === 25 /* SemicolonToken */ && !inErrorRecovery);
+                case 6 /* EnumMembers */:
+                    // Include open bracket computed properties. This technically also lets in indexers,
+                    // which would be a candidate for improved error reporting.
+                    return token() === 21 /* OpenBracketToken */ || isLiteralPropertyName();
+                case 12 /* ObjectLiteralMembers */:
+                    return token() === 21 /* OpenBracketToken */ || token() === 39 /* AsteriskToken */ || token() === 24 /* DotDotDotToken */ || isLiteralPropertyName();
+                case 17 /* RestProperties */:
+                    return isLiteralPropertyName();
+                case 9 /* ObjectBindingElements */:
+                    return token() === 21 /* OpenBracketToken */ || token() === 24 /* DotDotDotToken */ || isLiteralPropertyName();
+                case 7 /* HeritageClauseElement */:
+                    // If we see `{ ... }` then only consume it as an expression if it is followed by `,` or `{`
+                    // That way we won't consume the body of a class in its heritage clause.
+                    if (token() === 17 /* OpenBraceToken */) {
+                        return lookAhead(isValidHeritageClauseObjectLiteral);
                     }
-                    continue;
-                case 9 /* tab */:
-                case 11 /* verticalTab */:
-                case 12 /* formFeed */:
-                case 32 /* space */:
-                    pos++;
-                    continue;
-                case 47 /* slash */:
-                    var nextChar = text.charCodeAt(pos + 1);
-                    var hasTrailingNewLine = false;
-                    if (nextChar === 47 /* slash */ || nextChar === 42 /* asterisk */) {
-                        var kind = nextChar === 47 /* slash */ ? 2 /* SingleLineCommentTrivia */ : 3 /* MultiLineCommentTrivia */;
-                        var startPos = pos;
-                        pos += 2;
-                        if (nextChar === 47 /* slash */) {
-                            while (pos < text.length) {
-                                if (isLineBreak(text.charCodeAt(pos))) {
-                                    hasTrailingNewLine = true;
-                                    break;
-                                }
-                                pos++;
-                            }
-                        }
-                        else {
-                            while (pos < text.length) {
-                                if (text.charCodeAt(pos) === 42 /* asterisk */ && text.charCodeAt(pos + 1) === 47 /* slash */) {
-                                    pos += 2;
-                                    break;
-                                }
-                                pos++;
-                            }
-                        }
-                        if (collecting) {
-                            if (hasPendingCommentRange) {
-                                accumulator = cb(pendingPos, pendingEnd, pendingKind, pendingHasTrailingNewLine, state, accumulator);
-                                if (!reduce && accumulator) {
-                                    // If we are not reducing and we have a truthy result, return it.
-                                    return accumulator;
-                                }
-                                hasPendingCommentRange = false;
-                            }
-                            pendingPos = startPos;
-                            pendingEnd = pos;
-                            pendingKind = kind;
-                            pendingHasTrailingNewLine = hasTrailingNewLine;
-                            hasPendingCommentRange = true;
-                        }
-                        continue;
+                    if (!inErrorRecovery) {
+                        return isStartOfLeftHandSideExpression() && !isHeritageClauseExtendsOrImplementsKeyword();
                     }
-                    break scan;
-                default:
-                    if (ch > 127 /* maxAsciiCharacter */ && (isWhiteSpace(ch))) {
-                        if (hasPendingCommentRange && isLineBreak(ch)) {
-                            pendingHasTrailingNewLine = true;
-                        }
-                        pos++;
-                        continue;
+                    else {
+                        // If we're in error recovery we tighten up what we're willing to match.
+                        // That way we don't treat something like "this" as a valid heritage clause
+                        // element during recovery.
+                        return isIdentifier() && !isHeritageClauseExtendsOrImplementsKeyword();
                     }
-                    break scan;
+                case 8 /* VariableDeclarations */:
+                    return isIdentifierOrPattern();
+                case 10 /* ArrayBindingElements */:
+                    return token() === 26 /* CommaToken */ || token() === 24 /* DotDotDotToken */ || isIdentifierOrPattern();
+                case 18 /* TypeParameters */:
+                    return isIdentifier();
+                case 11 /* ArgumentExpressions */:
+                case 15 /* ArrayLiteralMembers */:
+                    return token() === 26 /* CommaToken */ || token() === 24 /* DotDotDotToken */ || isStartOfExpression();
+                case 16 /* Parameters */:
+                    return isStartOfParameter();
+                case 19 /* TypeArguments */:
+                case 20 /* TupleElementTypes */:
+                    return token() === 26 /* CommaToken */ || isStartOfType();
+                case 21 /* HeritageClauses */:
+                    return isHeritageClause();
+                case 22 /* ImportOrExportSpecifiers */:
+                    return ts.tokenIsIdentifierOrKeyword(token());
+                case 13 /* JsxAttributes */:
+                    return ts.tokenIsIdentifierOrKeyword(token()) || token() === 17 /* OpenBraceToken */;
+                case 14 /* JsxChildren */:
+                    return true;
+                case 23 /* JSDocFunctionParameters */:
+                case 24 /* JSDocTypeArguments */:
+                case 26 /* JSDocTupleTypes */:
+                    return JSDocParser.isJSDocType();
+                case 25 /* JSDocRecordMembers */:
+                    return isSimplePropertyName();
             }
+            ts.Debug.fail("Non-exhaustive case in 'isListElement'.");
         }
-        if (hasPendingCommentRange) {
-            accumulator = cb(pendingPos, pendingEnd, pendingKind, pendingHasTrailingNewLine, state, accumulator);
+        function isValidHeritageClauseObjectLiteral() {
+            ts.Debug.assert(token() === 17 /* OpenBraceToken */);
+            if (nextToken() === 18 /* CloseBraceToken */) {
+                // if we see  "extends {}" then only treat the {} as what we're extending (and not
+                // the class body) if we have:
+                //
+                //      extends {} {
+                //      extends {},
+                //      extends {} extends
+                //      extends {} implements
+                var next = nextToken();
+                return next === 26 /* CommaToken */ || next === 17 /* OpenBraceToken */ || next === 85 /* ExtendsKeyword */ || next === 108 /* ImplementsKeyword */;
+            }
+            return true;
         }
-        return accumulator;
-    }
-    function forEachLeadingCommentRange(text, pos, cb, state) {
-        return iterateCommentRanges(/*reduce*/ false, text, pos, /*trailing*/ false, cb, state);
-    }
-    ts.forEachLeadingCommentRange = forEachLeadingCommentRange;
-    function forEachTrailingCommentRange(text, pos, cb, state) {
-        return iterateCommentRanges(/*reduce*/ false, text, pos, /*trailing*/ true, cb, state);
-    }
-    ts.forEachTrailingCommentRange = forEachTrailingCommentRange;
-    function reduceEachLeadingCommentRange(text, pos, cb, state, initial) {
-        return iterateCommentRanges(/*reduce*/ true, text, pos, /*trailing*/ false, cb, state, initial);
-    }
-    ts.reduceEachLeadingCommentRange = reduceEachLeadingCommentRange;
-    function reduceEachTrailingCommentRange(text, pos, cb, state, initial) {
-        return iterateCommentRanges(/*reduce*/ true, text, pos, /*trailing*/ true, cb, state, initial);
-    }
-    ts.reduceEachTrailingCommentRange = reduceEachTrailingCommentRange;
-    function appendCommentRange(pos, end, kind, hasTrailingNewLine, state, comments) {
-        if (!comments) {
-            comments = [];
+        function nextTokenIsIdentifier() {
+            nextToken();
+            return isIdentifier();
         }
-        comments.push({ pos: pos, end: end, hasTrailingNewLine: hasTrailingNewLine, kind: kind });
-        return comments;
-    }
-    function getLeadingCommentRanges(text, pos) {
-        return reduceEachLeadingCommentRange(text, pos, appendCommentRange, undefined, undefined);
-    }
-    ts.getLeadingCommentRanges = getLeadingCommentRanges;
-    function getTrailingCommentRanges(text, pos) {
-        return reduceEachTrailingCommentRange(text, pos, appendCommentRange, undefined, undefined);
-    }
-    ts.getTrailingCommentRanges = getTrailingCommentRanges;
-    /** Optionally, get the shebang */
-    function getShebang(text) {
-        return shebangTriviaRegex.test(text)
-            ? shebangTriviaRegex.exec(text)[0]
-            : undefined;
-    }
-    ts.getShebang = getShebang;
-    function isIdentifierStart(ch, languageVersion) {
-        return ch >= 65 /* A */ && ch <= 90 /* Z */ || ch >= 97 /* a */ && ch <= 122 /* z */ ||
-            ch === 36 /* $ */ || ch === 95 /* _ */ ||
-            ch > 127 /* maxAsciiCharacter */ && isUnicodeIdentifierStart(ch, languageVersion);
-    }
-    ts.isIdentifierStart = isIdentifierStart;
-    function isIdentifierPart(ch, languageVersion) {
-        return ch >= 65 /* A */ && ch <= 90 /* Z */ || ch >= 97 /* a */ && ch <= 122 /* z */ ||
-            ch >= 48 /* _0 */ && ch <= 57 /* _9 */ || ch === 36 /* $ */ || ch === 95 /* _ */ ||
-            ch > 127 /* maxAsciiCharacter */ && isUnicodeIdentifierPart(ch, languageVersion);
-    }
-    ts.isIdentifierPart = isIdentifierPart;
-    /* @internal */
-    function isIdentifierText(name, languageVersion) {
-        if (!isIdentifierStart(name.charCodeAt(0), languageVersion)) {
-            return false;
+        function nextTokenIsIdentifierOrKeyword() {
+            nextToken();
+            return ts.tokenIsIdentifierOrKeyword(token());
         }
-        for (var i = 1, n = name.length; i < n; i++) {
-            if (!isIdentifierPart(name.charCodeAt(i), languageVersion)) {
-                return false;
+        function isHeritageClauseExtendsOrImplementsKeyword() {
+            if (token() === 108 /* ImplementsKeyword */ ||
+                token() === 85 /* ExtendsKeyword */) {
+                return lookAhead(nextTokenIsStartOfExpression);
             }
+            return false;
         }
-        return true;
-    }
-    ts.isIdentifierText = isIdentifierText;
-    // Creates a scanner over a (possibly unspecified) range of a piece of text.
-    function createScanner(languageVersion, skipTrivia, languageVariant, text, onError, start, length) {
-        if (languageVariant === void 0) { languageVariant = 0 /* Standard */; }
-        // Current position (end position of text of current token)
-        var pos;
-        // end of text
-        var end;
-        // Start position of whitespace before current token
-        var startPos;
-        // Start position of text of current token
-        var tokenPos;
-        var token;
-        var tokenValue;
-        var precedingLineBreak;
-        var hasExtendedUnicodeEscape;
-        var tokenIsUnterminated;
-        setText(text, start, length);
-        return {
-            getStartPos: function () { return startPos; },
-            getTextPos: function () { return pos; },
-            getToken: function () { return token; },
-            getTokenPos: function () { return tokenPos; },
-            getTokenText: function () { return text.substring(tokenPos, pos); },
-            getTokenValue: function () { return tokenValue; },
-            hasExtendedUnicodeEscape: function () { return hasExtendedUnicodeEscape; },
-            hasPrecedingLineBreak: function () { return precedingLineBreak; },
-            isIdentifier: function () { return token === 69 /* Identifier */ || token > 105 /* LastReservedWord */; },
-            isReservedWord: function () { return token >= 70 /* FirstReservedWord */ && token <= 105 /* LastReservedWord */; },
-            isUnterminated: function () { return tokenIsUnterminated; },
-            reScanGreaterToken: reScanGreaterToken,
-            reScanSlashToken: reScanSlashToken,
-            reScanTemplateToken: reScanTemplateToken,
-            scanJsxIdentifier: scanJsxIdentifier,
-            scanJsxAttributeValue: scanJsxAttributeValue,
-            reScanJsxToken: reScanJsxToken,
-            scanJsxToken: scanJsxToken,
-            scanJSDocToken: scanJSDocToken,
-            scan: scan,
-            getText: getText,
-            setText: setText,
-            setScriptTarget: setScriptTarget,
-            setLanguageVariant: setLanguageVariant,
-            setOnError: setOnError,
-            setTextPos: setTextPos,
-            tryScan: tryScan,
-            lookAhead: lookAhead,
-            scanRange: scanRange,
-        };
-        function error(message, length) {
-            if (onError) {
-                onError(message, length || 0);
-            }
+        function nextTokenIsStartOfExpression() {
+            nextToken();
+            return isStartOfExpression();
         }
-        function scanNumber() {
-            var start = pos;
-            while (isDigit(text.charCodeAt(pos)))
-                pos++;
-            if (text.charCodeAt(pos) === 46 /* dot */) {
-                pos++;
-                while (isDigit(text.charCodeAt(pos)))
-                    pos++;
+        // True if positioned at a list terminator
+        function isListTerminator(kind) {
+            if (token() === 1 /* EndOfFileToken */) {
+                // Being at the end of the file ends all lists.
+                return true;
             }
-            var end = pos;
-            if (text.charCodeAt(pos) === 69 /* E */ || text.charCodeAt(pos) === 101 /* e */) {
-                pos++;
-                if (text.charCodeAt(pos) === 43 /* plus */ || text.charCodeAt(pos) === 45 /* minus */)
-                    pos++;
-                if (isDigit(text.charCodeAt(pos))) {
-                    pos++;
-                    while (isDigit(text.charCodeAt(pos)))
-                        pos++;
-                    end = pos;
-                }
-                else {
-                    error(ts.Diagnostics.Digit_expected);
-                }
+            switch (kind) {
+                case 1 /* BlockStatements */:
+                case 2 /* SwitchClauses */:
+                case 4 /* TypeMembers */:
+                case 5 /* ClassMembers */:
+                case 6 /* EnumMembers */:
+                case 12 /* ObjectLiteralMembers */:
+                case 9 /* ObjectBindingElements */:
+                case 22 /* ImportOrExportSpecifiers */:
+                    return token() === 18 /* CloseBraceToken */;
+                case 3 /* SwitchClauseStatements */:
+                    return token() === 18 /* CloseBraceToken */ || token() === 73 /* CaseKeyword */ || token() === 79 /* DefaultKeyword */;
+                case 7 /* HeritageClauseElement */:
+                    return token() === 17 /* OpenBraceToken */ || token() === 85 /* ExtendsKeyword */ || token() === 108 /* ImplementsKeyword */;
+                case 8 /* VariableDeclarations */:
+                    return isVariableDeclaratorListTerminator();
+                case 18 /* TypeParameters */:
+                    // Tokens other than '>' are here for better error recovery
+                    return token() === 29 /* GreaterThanToken */ || token() === 19 /* OpenParenToken */ || token() === 17 /* OpenBraceToken */ || token() === 85 /* ExtendsKeyword */ || token() === 108 /* ImplementsKeyword */;
+                case 11 /* ArgumentExpressions */:
+                    // Tokens other than ')' are here for better error recovery
+                    return token() === 20 /* CloseParenToken */ || token() === 25 /* SemicolonToken */;
+                case 15 /* ArrayLiteralMembers */:
+                case 20 /* TupleElementTypes */:
+                case 10 /* ArrayBindingElements */:
+                    return token() === 22 /* CloseBracketToken */;
+                case 16 /* Parameters */:
+                case 17 /* RestProperties */:
+                    // Tokens other than ')' and ']' (the latter for index signatures) are here for better error recovery
+                    return token() === 20 /* CloseParenToken */ || token() === 22 /* CloseBracketToken */ /*|| token === SyntaxKind.OpenBraceToken*/;
+                case 19 /* TypeArguments */:
+                    // All other tokens should cause the type-argument to terminate except comma token
+                    return token() !== 26 /* CommaToken */;
+                case 21 /* HeritageClauses */:
+                    return token() === 17 /* OpenBraceToken */ || token() === 18 /* CloseBraceToken */;
+                case 13 /* JsxAttributes */:
+                    return token() === 29 /* GreaterThanToken */ || token() === 41 /* SlashToken */;
+                case 14 /* JsxChildren */:
+                    return token() === 27 /* LessThanToken */ && lookAhead(nextTokenIsSlash);
+                case 23 /* JSDocFunctionParameters */:
+                    return token() === 20 /* CloseParenToken */ || token() === 56 /* ColonToken */ || token() === 18 /* CloseBraceToken */;
+                case 24 /* JSDocTypeArguments */:
+                    return token() === 29 /* GreaterThanToken */ || token() === 18 /* CloseBraceToken */;
+                case 26 /* JSDocTupleTypes */:
+                    return token() === 22 /* CloseBracketToken */ || token() === 18 /* CloseBraceToken */;
+                case 25 /* JSDocRecordMembers */:
+                    return token() === 18 /* CloseBraceToken */;
             }
-            return "" + +(text.substring(start, end));
         }
-        function scanOctalDigits() {
-            var start = pos;
-            while (isOctalDigit(text.charCodeAt(pos))) {
-                pos++;
+        function isVariableDeclaratorListTerminator() {
+            // If we can consume a semicolon (either explicitly, or with ASI), then consider us done
+            // with parsing the list of  variable declarators.
+            if (canParseSemicolon()) {
+                return true;
             }
-            return +(text.substring(start, pos));
-        }
-        /**
-         * Scans the given number of hexadecimal digits in the text,
-         * returning -1 if the given number is unavailable.
-         */
-        function scanExactNumberOfHexDigits(count) {
-            return scanHexDigits(/*minCount*/ count, /*scanAsManyAsPossible*/ false);
-        }
-        /**
-         * Scans as many hexadecimal digits as are available in the text,
-         * returning -1 if the given number of digits was unavailable.
-         */
-        function scanMinimumNumberOfHexDigits(count) {
-            return scanHexDigits(/*minCount*/ count, /*scanAsManyAsPossible*/ true);
-        }
-        function scanHexDigits(minCount, scanAsManyAsPossible) {
-            var digits = 0;
-            var value = 0;
-            while (digits < minCount || scanAsManyAsPossible) {
-                var ch = text.charCodeAt(pos);
-                if (ch >= 48 /* _0 */ && ch <= 57 /* _9 */) {
-                    value = value * 16 + ch - 48 /* _0 */;
-                }
-                else if (ch >= 65 /* A */ && ch <= 70 /* F */) {
-                    value = value * 16 + ch - 65 /* A */ + 10;
-                }
-                else if (ch >= 97 /* a */ && ch <= 102 /* f */) {
-                    value = value * 16 + ch - 97 /* a */ + 10;
-                }
-                else {
-                    break;
-                }
-                pos++;
-                digits++;
+            // in the case where we're parsing the variable declarator of a 'for-in' statement, we
+            // are done if we see an 'in' keyword in front of us. Same with for-of
+            if (isInOrOfKeyword(token())) {
+                return true;
             }
-            if (digits < minCount) {
-                value = -1;
+            // ERROR RECOVERY TWEAK:
+            // For better error recovery, if we see an '=>' then we just stop immediately.  We've got an
+            // arrow function here and it's going to be very unlikely that we'll resynchronize and get
+            // another variable declaration.
+            if (token() === 36 /* EqualsGreaterThanToken */) {
+                return true;
             }
-            return value;
+            // Keep trying to parse out variable declarators.
+            return false;
         }
-        function scanString(allowEscapes) {
-            if (allowEscapes === void 0) { allowEscapes = true; }
-            var quote = text.charCodeAt(pos);
-            pos++;
-            var result = "";
-            var start = pos;
-            while (true) {
-                if (pos >= end) {
-                    result += text.substring(start, pos);
-                    tokenIsUnterminated = true;
-                    error(ts.Diagnostics.Unterminated_string_literal);
-                    break;
-                }
-                var ch = text.charCodeAt(pos);
-                if (ch === quote) {
-                    result += text.substring(start, pos);
-                    pos++;
-                    break;
-                }
-                if (ch === 92 /* backslash */ && allowEscapes) {
-                    result += text.substring(start, pos);
-                    result += scanEscapeSequence();
-                    start = pos;
-                    continue;
-                }
-                if (isLineBreak(ch)) {
-                    result += text.substring(start, pos);
-                    tokenIsUnterminated = true;
-                    error(ts.Diagnostics.Unterminated_string_literal);
-                    break;
+        // True if positioned at element or terminator of the current list or any enclosing list
+        function isInSomeParsingContext() {
+            for (var kind = 0; kind < 27 /* Count */; kind++) {
+                if (parsingContext & (1 << kind)) {
+                    if (isListElement(kind, /*inErrorRecovery*/ true) || isListTerminator(kind)) {
+                        return true;
+                    }
                 }
-                pos++;
             }
-            return result;
+            return false;
         }
-        /**
-         * Sets the current 'tokenValue' and returns a NoSubstitutionTemplateLiteral or
-         * a literal component of a TemplateExpression.
-         */
-        function scanTemplateAndSetTokenValue() {
-            var startedWithBacktick = text.charCodeAt(pos) === 96 /* backtick */;
-            pos++;
-            var start = pos;
-            var contents = "";
-            var resultingToken;
-            while (true) {
-                if (pos >= end) {
-                    contents += text.substring(start, pos);
-                    tokenIsUnterminated = true;
-                    error(ts.Diagnostics.Unterminated_template_literal);
-                    resultingToken = startedWithBacktick ? 11 /* NoSubstitutionTemplateLiteral */ : 14 /* TemplateTail */;
-                    break;
-                }
-                var currChar = text.charCodeAt(pos);
-                // '`'
-                if (currChar === 96 /* backtick */) {
-                    contents += text.substring(start, pos);
-                    pos++;
-                    resultingToken = startedWithBacktick ? 11 /* NoSubstitutionTemplateLiteral */ : 14 /* TemplateTail */;
-                    break;
-                }
-                // '${'
-                if (currChar === 36 /* $ */ && pos + 1 < end && text.charCodeAt(pos + 1) === 123 /* openBrace */) {
-                    contents += text.substring(start, pos);
-                    pos += 2;
-                    resultingToken = startedWithBacktick ? 12 /* TemplateHead */ : 13 /* TemplateMiddle */;
-                    break;
-                }
-                // Escape character
-                if (currChar === 92 /* backslash */) {
-                    contents += text.substring(start, pos);
-                    contents += scanEscapeSequence();
-                    start = pos;
+        // Parses a list of elements
+        function parseList(kind, parseElement) {
+            var saveParsingContext = parsingContext;
+            parsingContext |= 1 << kind;
+            var result = createNodeArray();
+            while (!isListTerminator(kind)) {
+                if (isListElement(kind, /*inErrorRecovery*/ false)) {
+                    var element = parseListElement(kind, parseElement);
+                    result.push(element);
                     continue;
                 }
-                // Speculated ECMAScript 6 Spec 11.8.6.1:
-                // <CR><LF> and <CR> LineTerminatorSequences are normalized to <LF> for Template Values
-                if (currChar === 13 /* carriageReturn */) {
-                    contents += text.substring(start, pos);
-                    pos++;
-                    if (pos < end && text.charCodeAt(pos) === 10 /* lineFeed */) {
-                        pos++;
-                    }
-                    contents += "\n";
-                    start = pos;
-                    continue;
+                if (abortParsingListOrMoveToNextToken(kind)) {
+                    break;
                 }
-                pos++;
             }
-            ts.Debug.assert(resultingToken !== undefined);
-            tokenValue = contents;
-            return resultingToken;
+            result.end = getNodeEnd();
+            parsingContext = saveParsingContext;
+            return result;
         }
-        function scanEscapeSequence() {
-            pos++;
-            if (pos >= end) {
-                error(ts.Diagnostics.Unexpected_end_of_text);
-                return "";
-            }
-            var ch = text.charCodeAt(pos);
-            pos++;
-            switch (ch) {
-                case 48 /* _0 */:
-                    return "\0";
-                case 98 /* b */:
-                    return "\b";
-                case 116 /* t */:
-                    return "\t";
-                case 110 /* n */:
-                    return "\n";
-                case 118 /* v */:
-                    return "\v";
-                case 102 /* f */:
-                    return "\f";
-                case 114 /* r */:
-                    return "\r";
-                case 39 /* singleQuote */:
-                    return "\'";
-                case 34 /* doubleQuote */:
-                    return "\"";
-                case 117 /* u */:
-                    // '\u{DDDDDDDD}'
-                    if (pos < end && text.charCodeAt(pos) === 123 /* openBrace */) {
-                        hasExtendedUnicodeEscape = true;
-                        pos++;
-                        return scanExtendedUnicodeEscape();
-                    }
-                    // '\uDDDD'
-                    return scanHexadecimalEscape(/*numDigits*/ 4);
-                case 120 /* x */:
-                    // '\xDD'
-                    return scanHexadecimalEscape(/*numDigits*/ 2);
-                // when encountering a LineContinuation (i.e. a backslash and a line terminator sequence),
-                // the line terminator is interpreted to be "the empty code unit sequence".
-                case 13 /* carriageReturn */:
-                    if (pos < end && text.charCodeAt(pos) === 10 /* lineFeed */) {
-                        pos++;
-                    }
-                // fall through
-                case 10 /* lineFeed */:
-                case 8232 /* lineSeparator */:
-                case 8233 /* paragraphSeparator */:
-                    return "";
-                default:
-                    return String.fromCharCode(ch);
+        function parseListElement(parsingContext, parseElement) {
+            var node = currentNode(parsingContext);
+            if (node) {
+                return consumeNode(node);
             }
+            return parseElement();
         }
-        function scanHexadecimalEscape(numDigits) {
-            var escapedValue = scanExactNumberOfHexDigits(numDigits);
-            if (escapedValue >= 0) {
-                return String.fromCharCode(escapedValue);
+        function currentNode(parsingContext) {
+            // If there is an outstanding parse error that we've encountered, but not attached to
+            // some node, then we cannot get a node from the old source tree.  This is because we
+            // want to mark the next node we encounter as being unusable.
+            //
+            // Note: This may be too conservative.  Perhaps we could reuse the node and set the bit
+            // on it (or its leftmost child) as having the error.  For now though, being conservative
+            // is nice and likely won't ever affect perf.
+            if (parseErrorBeforeNextFinishedNode) {
+                return undefined;
             }
-            else {
-                error(ts.Diagnostics.Hexadecimal_digit_expected);
-                return "";
+            if (!syntaxCursor) {
+                // if we don't have a cursor, we could never return a node from the old tree.
+                return undefined;
             }
-        }
-        function scanExtendedUnicodeEscape() {
-            var escapedValue = scanMinimumNumberOfHexDigits(1);
-            var isInvalidExtendedEscape = false;
-            // Validate the value of the digit
-            if (escapedValue < 0) {
-                error(ts.Diagnostics.Hexadecimal_digit_expected);
-                isInvalidExtendedEscape = true;
+            var node = syntaxCursor.currentNode(scanner.getStartPos());
+            // Can't reuse a missing node.
+            if (ts.nodeIsMissing(node)) {
+                return undefined;
             }
-            else if (escapedValue > 0x10FFFF) {
-                error(ts.Diagnostics.An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive);
-                isInvalidExtendedEscape = true;
+            // Can't reuse a node that intersected the change range.
+            if (node.intersectsChange) {
+                return undefined;
             }
-            if (pos >= end) {
-                error(ts.Diagnostics.Unexpected_end_of_text);
-                isInvalidExtendedEscape = true;
+            // Can't reuse a node that contains a parse error.  This is necessary so that we
+            // produce the same set of errors again.
+            if (ts.containsParseError(node)) {
+                return undefined;
             }
-            else if (text.charCodeAt(pos) === 125 /* closeBrace */) {
-                // Only swallow the following character up if it's a '}'.
-                pos++;
+            // We can only reuse a node if it was parsed under the same strict mode that we're
+            // currently in.  i.e. if we originally parsed a node in non-strict mode, but then
+            // the user added 'using strict' at the top of the file, then we can't use that node
+            // again as the presence of strict mode may cause us to parse the tokens in the file
+            // differently.
+            //
+            // Note: we *can* reuse tokens when the strict mode changes.  That's because tokens
+            // are unaffected by strict mode.  It's just the parser will decide what to do with it
+            // differently depending on what mode it is in.
+            //
+            // This also applies to all our other context flags as well.
+            var nodeContextFlags = node.flags & 96256 /* ContextFlags */;
+            if (nodeContextFlags !== contextFlags) {
+                return undefined;
             }
-            else {
-                error(ts.Diagnostics.Unterminated_Unicode_escape_sequence);
-                isInvalidExtendedEscape = true;
+            // Ok, we have a node that looks like it could be reused.  Now verify that it is valid
+            // in the current list parsing context that we're currently at.
+            if (!canReuseNode(node, parsingContext)) {
+                return undefined;
             }
-            if (isInvalidExtendedEscape) {
-                return "";
+            return node;
+        }
+        function consumeNode(node) {
+            // Move the scanner so it is after the node we just consumed.
+            scanner.setTextPos(node.end);
+            nextToken();
+            return node;
+        }
+        function canReuseNode(node, parsingContext) {
+            switch (parsingContext) {
+                case 5 /* ClassMembers */:
+                    return isReusableClassMember(node);
+                case 2 /* SwitchClauses */:
+                    return isReusableSwitchClause(node);
+                case 0 /* SourceElements */:
+                case 1 /* BlockStatements */:
+                case 3 /* SwitchClauseStatements */:
+                    return isReusableStatement(node);
+                case 6 /* EnumMembers */:
+                    return isReusableEnumMember(node);
+                case 4 /* TypeMembers */:
+                    return isReusableTypeMember(node);
+                case 8 /* VariableDeclarations */:
+                    return isReusableVariableDeclaration(node);
+                case 16 /* Parameters */:
+                    return isReusableParameter(node);
+                case 17 /* RestProperties */:
+                    return false;
+                // Any other lists we do not care about reusing nodes in.  But feel free to add if
+                // you can do so safely.  Danger areas involve nodes that may involve speculative
+                // parsing.  If speculative parsing is involved with the node, then the range the
+                // parser reached while looking ahead might be in the edited range (see the example
+                // in canReuseVariableDeclaratorNode for a good case of this).
+                case 21 /* HeritageClauses */:
+                // This would probably be safe to reuse.  There is no speculative parsing with
+                // heritage clauses.
+                case 18 /* TypeParameters */:
+                // This would probably be safe to reuse.  There is no speculative parsing with
+                // type parameters.  Note that that's because type *parameters* only occur in
+                // unambiguous *type* contexts.  While type *arguments* occur in very ambiguous
+                // *expression* contexts.
+                case 20 /* TupleElementTypes */:
+                // This would probably be safe to reuse.  There is no speculative parsing with
+                // tuple types.
+                // Technically, type argument list types are probably safe to reuse.  While
+                // speculative parsing is involved with them (since type argument lists are only
+                // produced from speculative parsing a < as a type argument list), we only have
+                // the types because speculative parsing succeeded.  Thus, the lookahead never
+                // went past the end of the list and rewound.
+                case 19 /* TypeArguments */:
+                // Note: these are almost certainly not safe to ever reuse.  Expressions commonly
+                // need a large amount of lookahead, and we should not reuse them as they may
+                // have actually intersected the edit.
+                case 11 /* ArgumentExpressions */:
+                // This is not safe to reuse for the same reason as the 'AssignmentExpression'
+                // cases.  i.e. a property assignment may end with an expression, and thus might
+                // have lookahead far beyond it's old node.
+                case 12 /* ObjectLiteralMembers */:
+                // This is probably not safe to reuse.  There can be speculative parsing with
+                // type names in a heritage clause.  There can be generic names in the type
+                // name list, and there can be left hand side expressions (which can have type
+                // arguments.)
+                case 7 /* HeritageClauseElement */:
+                // Perhaps safe to reuse, but it's unlikely we'd see more than a dozen attributes
+                // on any given element. Same for children.
+                case 13 /* JsxAttributes */:
+                case 14 /* JsxChildren */:
             }
-            return utf16EncodeAsString(escapedValue);
+            return false;
         }
-        // Derived from the 10.1.1 UTF16Encoding of the ES6 Spec.
-        function utf16EncodeAsString(codePoint) {
-            ts.Debug.assert(0x0 <= codePoint && codePoint <= 0x10FFFF);
-            if (codePoint <= 65535) {
-                return String.fromCharCode(codePoint);
+        function isReusableClassMember(node) {
+            if (node) {
+                switch (node.kind) {
+                    case 152 /* Constructor */:
+                    case 157 /* IndexSignature */:
+                    case 153 /* GetAccessor */:
+                    case 154 /* SetAccessor */:
+                    case 149 /* PropertyDeclaration */:
+                    case 206 /* SemicolonClassElement */:
+                        return true;
+                    case 151 /* MethodDeclaration */:
+                        // Method declarations are not necessarily reusable.  An object-literal
+                        // may have a method calls "constructor(...)" and we must reparse that
+                        // into an actual .ConstructorDeclaration.
+                        var methodDeclaration = node;
+                        var nameIsConstructor = methodDeclaration.name.kind === 71 /* Identifier */ &&
+                            methodDeclaration.name.originalKeywordKind === 123 /* ConstructorKeyword */;
+                        return !nameIsConstructor;
+                }
             }
-            var codeUnit1 = Math.floor((codePoint - 65536) / 1024) + 0xD800;
-            var codeUnit2 = ((codePoint - 65536) % 1024) + 0xDC00;
-            return String.fromCharCode(codeUnit1, codeUnit2);
+            return false;
         }
-        // Current character is known to be a backslash. Check for Unicode escape of the form '\uXXXX'
-        // and return code point value if valid Unicode escape is found. Otherwise return -1.
-        function peekUnicodeEscape() {
-            if (pos + 5 < end && text.charCodeAt(pos + 1) === 117 /* u */) {
-                var start_1 = pos;
-                pos += 2;
-                var value = scanExactNumberOfHexDigits(4);
-                pos = start_1;
-                return value;
+        function isReusableSwitchClause(node) {
+            if (node) {
+                switch (node.kind) {
+                    case 257 /* CaseClause */:
+                    case 258 /* DefaultClause */:
+                        return true;
+                }
             }
-            return -1;
+            return false;
         }
-        function scanIdentifierParts() {
-            var result = "";
-            var start = pos;
-            while (pos < end) {
-                var ch = text.charCodeAt(pos);
-                if (isIdentifierPart(ch, languageVersion)) {
-                    pos++;
-                }
-                else if (ch === 92 /* backslash */) {
-                    ch = peekUnicodeEscape();
-                    if (!(ch >= 0 && isIdentifierPart(ch, languageVersion))) {
-                        break;
-                    }
-                    result += text.substring(start, pos);
-                    result += String.fromCharCode(ch);
-                    // Valid Unicode escape is always six characters
-                    pos += 6;
-                    start = pos;
-                }
-                else {
-                    break;
+        function isReusableStatement(node) {
+            if (node) {
+                switch (node.kind) {
+                    case 228 /* FunctionDeclaration */:
+                    case 208 /* VariableStatement */:
+                    case 207 /* Block */:
+                    case 211 /* IfStatement */:
+                    case 210 /* ExpressionStatement */:
+                    case 223 /* ThrowStatement */:
+                    case 219 /* ReturnStatement */:
+                    case 221 /* SwitchStatement */:
+                    case 218 /* BreakStatement */:
+                    case 217 /* ContinueStatement */:
+                    case 215 /* ForInStatement */:
+                    case 216 /* ForOfStatement */:
+                    case 214 /* ForStatement */:
+                    case 213 /* WhileStatement */:
+                    case 220 /* WithStatement */:
+                    case 209 /* EmptyStatement */:
+                    case 224 /* TryStatement */:
+                    case 222 /* LabeledStatement */:
+                    case 212 /* DoStatement */:
+                    case 225 /* DebuggerStatement */:
+                    case 238 /* ImportDeclaration */:
+                    case 237 /* ImportEqualsDeclaration */:
+                    case 244 /* ExportDeclaration */:
+                    case 243 /* ExportAssignment */:
+                    case 233 /* ModuleDeclaration */:
+                    case 229 /* ClassDeclaration */:
+                    case 230 /* InterfaceDeclaration */:
+                    case 232 /* EnumDeclaration */:
+                    case 231 /* TypeAliasDeclaration */:
+                        return true;
                 }
             }
-            result += text.substring(start, pos);
-            return result;
+            return false;
         }
-        function getIdentifierToken() {
-            // Reserved words are between 2 and 11 characters long and start with a lowercase letter
-            var len = tokenValue.length;
-            if (len >= 2 && len <= 11) {
-                var ch = tokenValue.charCodeAt(0);
-                if (ch >= 97 /* a */ && ch <= 122 /* z */ && hasOwnProperty.call(textToToken, tokenValue)) {
-                    return token = textToToken[tokenValue];
+        function isReusableEnumMember(node) {
+            return node.kind === 264 /* EnumMember */;
+        }
+        function isReusableTypeMember(node) {
+            if (node) {
+                switch (node.kind) {
+                    case 156 /* ConstructSignature */:
+                    case 150 /* MethodSignature */:
+                    case 157 /* IndexSignature */:
+                    case 148 /* PropertySignature */:
+                    case 155 /* CallSignature */:
+                        return true;
                 }
             }
-            return token = 69 /* Identifier */;
+            return false;
         }
-        function scanBinaryOrOctalDigits(base) {
-            ts.Debug.assert(base !== 2 || base !== 8, "Expected either base 2 or base 8");
-            var value = 0;
-            // For counting number of digits; Valid binaryIntegerLiteral must have at least one binary digit following B or b.
-            // Similarly valid octalIntegerLiteral must have at least one octal digit following o or O.
-            var numberOfDigits = 0;
-            while (true) {
-                var ch = text.charCodeAt(pos);
-                var valueOfCh = ch - 48 /* _0 */;
-                if (!isDigit(ch) || valueOfCh >= base) {
-                    break;
-                }
-                value = value * base + valueOfCh;
-                pos++;
-                numberOfDigits++;
+        function isReusableVariableDeclaration(node) {
+            if (node.kind !== 226 /* VariableDeclaration */) {
+                return false;
             }
-            // Invalid binaryIntegerLiteral or octalIntegerLiteral
-            if (numberOfDigits === 0) {
-                return -1;
+            // Very subtle incremental parsing bug.  Consider the following code:
+            //
+            //      let v = new List < A, B
+            //
+            // This is actually legal code.  It's a list of variable declarators "v = new List<A"
+            // on one side and "B" on the other. If you then change that to:
+            //
+            //      let v = new List < A, B >()
+            //
+            // then we have a problem.  "v = new List<A" doesn't intersect the change range, so we
+            // start reparsing at "B" and we completely fail to handle this properly.
+            //
+            // In order to prevent this, we do not allow a variable declarator to be reused if it
+            // has an initializer.
+            var variableDeclarator = node;
+            return variableDeclarator.initializer === undefined;
+        }
+        function isReusableParameter(node) {
+            if (node.kind !== 146 /* Parameter */) {
+                return false;
             }
-            return value;
+            // See the comment in isReusableVariableDeclaration for why we do this.
+            var parameter = node;
+            return parameter.initializer === undefined;
         }
-        function scan() {
-            startPos = pos;
-            hasExtendedUnicodeEscape = false;
-            precedingLineBreak = false;
-            tokenIsUnterminated = false;
-            while (true) {
-                tokenPos = pos;
-                if (pos >= end) {
-                    return token = 1 /* EndOfFileToken */;
-                }
-                var ch = text.charCodeAt(pos);
-                // Special handling for shebang
-                if (ch === 35 /* hash */ && pos === 0 && isShebangTrivia(text, pos)) {
-                    pos = scanShebangTrivia(text, pos);
-                    if (skipTrivia) {
-                        continue;
-                    }
-                    else {
-                        return token = 6 /* ShebangTrivia */;
-                    }
-                }
-                switch (ch) {
-                    case 10 /* lineFeed */:
-                    case 13 /* carriageReturn */:
-                        precedingLineBreak = true;
-                        if (skipTrivia) {
-                            pos++;
-                            continue;
-                        }
-                        else {
-                            if (ch === 13 /* carriageReturn */ && pos + 1 < end && text.charCodeAt(pos + 1) === 10 /* lineFeed */) {
-                                // consume both CR and LF
-                                pos += 2;
-                            }
-                            else {
-                                pos++;
-                            }
-                            return token = 4 /* NewLineTrivia */;
-                        }
-                    case 9 /* tab */:
-                    case 11 /* verticalTab */:
-                    case 12 /* formFeed */:
-                    case 32 /* space */:
-                        if (skipTrivia) {
-                            pos++;
-                            continue;
-                        }
-                        else {
-                            while (pos < end && isWhiteSpaceSingleLine(text.charCodeAt(pos))) {
-                                pos++;
-                            }
-                            return token = 5 /* WhitespaceTrivia */;
-                        }
-                    case 33 /* exclamation */:
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            if (text.charCodeAt(pos + 2) === 61 /* equals */) {
-                                return pos += 3, token = 33 /* ExclamationEqualsEqualsToken */;
-                            }
-                            return pos += 2, token = 31 /* ExclamationEqualsToken */;
-                        }
-                        pos++;
-                        return token = 49 /* ExclamationToken */;
-                    case 34 /* doubleQuote */:
-                    case 39 /* singleQuote */:
-                        tokenValue = scanString();
-                        return token = 9 /* StringLiteral */;
-                    case 96 /* backtick */:
-                        return token = scanTemplateAndSetTokenValue();
-                    case 37 /* percent */:
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            return pos += 2, token = 62 /* PercentEqualsToken */;
-                        }
-                        pos++;
-                        return token = 40 /* PercentToken */;
-                    case 38 /* ampersand */:
-                        if (text.charCodeAt(pos + 1) === 38 /* ampersand */) {
-                            return pos += 2, token = 51 /* AmpersandAmpersandToken */;
-                        }
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            return pos += 2, token = 66 /* AmpersandEqualsToken */;
-                        }
-                        pos++;
-                        return token = 46 /* AmpersandToken */;
-                    case 40 /* openParen */:
-                        pos++;
-                        return token = 17 /* OpenParenToken */;
-                    case 41 /* closeParen */:
-                        pos++;
-                        return token = 18 /* CloseParenToken */;
-                    case 42 /* asterisk */:
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            return pos += 2, token = 59 /* AsteriskEqualsToken */;
-                        }
-                        if (text.charCodeAt(pos + 1) === 42 /* asterisk */) {
-                            if (text.charCodeAt(pos + 2) === 61 /* equals */) {
-                                return pos += 3, token = 60 /* AsteriskAsteriskEqualsToken */;
-                            }
-                            return pos += 2, token = 38 /* AsteriskAsteriskToken */;
-                        }
-                        pos++;
-                        return token = 37 /* AsteriskToken */;
-                    case 43 /* plus */:
-                        if (text.charCodeAt(pos + 1) === 43 /* plus */) {
-                            return pos += 2, token = 41 /* PlusPlusToken */;
-                        }
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            return pos += 2, token = 57 /* PlusEqualsToken */;
-                        }
-                        pos++;
-                        return token = 35 /* PlusToken */;
-                    case 44 /* comma */:
-                        pos++;
-                        return token = 24 /* CommaToken */;
-                    case 45 /* minus */:
-                        if (text.charCodeAt(pos + 1) === 45 /* minus */) {
-                            return pos += 2, token = 42 /* MinusMinusToken */;
-                        }
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            return pos += 2, token = 58 /* MinusEqualsToken */;
-                        }
-                        pos++;
-                        return token = 36 /* MinusToken */;
-                    case 46 /* dot */:
-                        if (isDigit(text.charCodeAt(pos + 1))) {
-                            tokenValue = scanNumber();
-                            return token = 8 /* NumericLiteral */;
-                        }
-                        if (text.charCodeAt(pos + 1) === 46 /* dot */ && text.charCodeAt(pos + 2) === 46 /* dot */) {
-                            return pos += 3, token = 22 /* DotDotDotToken */;
-                        }
-                        pos++;
-                        return token = 21 /* DotToken */;
-                    case 47 /* slash */:
-                        // Single-line comment
-                        if (text.charCodeAt(pos + 1) === 47 /* slash */) {
-                            pos += 2;
-                            while (pos < end) {
-                                if (isLineBreak(text.charCodeAt(pos))) {
-                                    break;
-                                }
-                                pos++;
-                            }
-                            if (skipTrivia) {
-                                continue;
-                            }
-                            else {
-                                return token = 2 /* SingleLineCommentTrivia */;
-                            }
-                        }
-                        // Multi-line comment
-                        if (text.charCodeAt(pos + 1) === 42 /* asterisk */) {
-                            pos += 2;
-                            var commentClosed = false;
-                            while (pos < end) {
-                                var ch_2 = text.charCodeAt(pos);
-                                if (ch_2 === 42 /* asterisk */ && text.charCodeAt(pos + 1) === 47 /* slash */) {
-                                    pos += 2;
-                                    commentClosed = true;
-                                    break;
-                                }
-                                if (isLineBreak(ch_2)) {
-                                    precedingLineBreak = true;
-                                }
-                                pos++;
-                            }
-                            if (!commentClosed) {
-                                error(ts.Diagnostics.Asterisk_Slash_expected);
-                            }
-                            if (skipTrivia) {
-                                continue;
-                            }
-                            else {
-                                tokenIsUnterminated = !commentClosed;
-                                return token = 3 /* MultiLineCommentTrivia */;
-                            }
-                        }
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            return pos += 2, token = 61 /* SlashEqualsToken */;
-                        }
-                        pos++;
-                        return token = 39 /* SlashToken */;
-                    case 48 /* _0 */:
-                        if (pos + 2 < end && (text.charCodeAt(pos + 1) === 88 /* X */ || text.charCodeAt(pos + 1) === 120 /* x */)) {
-                            pos += 2;
-                            var value = scanMinimumNumberOfHexDigits(1);
-                            if (value < 0) {
-                                error(ts.Diagnostics.Hexadecimal_digit_expected);
-                                value = 0;
-                            }
-                            tokenValue = "" + value;
-                            return token = 8 /* NumericLiteral */;
-                        }
-                        else if (pos + 2 < end && (text.charCodeAt(pos + 1) === 66 /* B */ || text.charCodeAt(pos + 1) === 98 /* b */)) {
-                            pos += 2;
-                            var value = scanBinaryOrOctalDigits(/* base */ 2);
-                            if (value < 0) {
-                                error(ts.Diagnostics.Binary_digit_expected);
-                                value = 0;
-                            }
-                            tokenValue = "" + value;
-                            return token = 8 /* NumericLiteral */;
-                        }
-                        else if (pos + 2 < end && (text.charCodeAt(pos + 1) === 79 /* O */ || text.charCodeAt(pos + 1) === 111 /* o */)) {
-                            pos += 2;
-                            var value = scanBinaryOrOctalDigits(/* base */ 8);
-                            if (value < 0) {
-                                error(ts.Diagnostics.Octal_digit_expected);
-                                value = 0;
-                            }
-                            tokenValue = "" + value;
-                            return token = 8 /* NumericLiteral */;
-                        }
-                        // Try to parse as an octal
-                        if (pos + 1 < end && isOctalDigit(text.charCodeAt(pos + 1))) {
-                            tokenValue = "" + scanOctalDigits();
-                            return token = 8 /* NumericLiteral */;
-                        }
-                    // This fall-through is a deviation from the EcmaScript grammar. The grammar says that a leading zero
-                    // can only be followed by an octal digit, a dot, or the end of the number literal. However, we are being
-                    // permissive and allowing decimal digits of the form 08* and 09* (which many browsers also do).
-                    case 49 /* _1 */:
-                    case 50 /* _2 */:
-                    case 51 /* _3 */:
-                    case 52 /* _4 */:
-                    case 53 /* _5 */:
-                    case 54 /* _6 */:
-                    case 55 /* _7 */:
-                    case 56 /* _8 */:
-                    case 57 /* _9 */:
-                        tokenValue = scanNumber();
-                        return token = 8 /* NumericLiteral */;
-                    case 58 /* colon */:
-                        pos++;
-                        return token = 54 /* ColonToken */;
-                    case 59 /* semicolon */:
-                        pos++;
-                        return token = 23 /* SemicolonToken */;
-                    case 60 /* lessThan */:
-                        if (isConflictMarkerTrivia(text, pos)) {
-                            pos = scanConflictMarkerTrivia(text, pos, error);
-                            if (skipTrivia) {
-                                continue;
-                            }
-                            else {
-                                return token = 7 /* ConflictMarkerTrivia */;
-                            }
-                        }
-                        if (text.charCodeAt(pos + 1) === 60 /* lessThan */) {
-                            if (text.charCodeAt(pos + 2) === 61 /* equals */) {
-                                return pos += 3, token = 63 /* LessThanLessThanEqualsToken */;
-                            }
-                            return pos += 2, token = 43 /* LessThanLessThanToken */;
-                        }
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            return pos += 2, token = 28 /* LessThanEqualsToken */;
-                        }
-                        if (languageVariant === 1 /* JSX */ &&
-                            text.charCodeAt(pos + 1) === 47 /* slash */ &&
-                            text.charCodeAt(pos + 2) !== 42 /* asterisk */) {
-                            return pos += 2, token = 26 /* LessThanSlashToken */;
-                        }
-                        pos++;
-                        return token = 25 /* LessThanToken */;
-                    case 61 /* equals */:
-                        if (isConflictMarkerTrivia(text, pos)) {
-                            pos = scanConflictMarkerTrivia(text, pos, error);
-                            if (skipTrivia) {
-                                continue;
-                            }
-                            else {
-                                return token = 7 /* ConflictMarkerTrivia */;
-                            }
-                        }
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            if (text.charCodeAt(pos + 2) === 61 /* equals */) {
-                                return pos += 3, token = 32 /* EqualsEqualsEqualsToken */;
-                            }
-                            return pos += 2, token = 30 /* EqualsEqualsToken */;
-                        }
-                        if (text.charCodeAt(pos + 1) === 62 /* greaterThan */) {
-                            return pos += 2, token = 34 /* EqualsGreaterThanToken */;
-                        }
-                        pos++;
-                        return token = 56 /* EqualsToken */;
-                    case 62 /* greaterThan */:
-                        if (isConflictMarkerTrivia(text, pos)) {
-                            pos = scanConflictMarkerTrivia(text, pos, error);
-                            if (skipTrivia) {
-                                continue;
-                            }
-                            else {
-                                return token = 7 /* ConflictMarkerTrivia */;
-                            }
-                        }
-                        pos++;
-                        return token = 27 /* GreaterThanToken */;
-                    case 63 /* question */:
-                        pos++;
-                        return token = 53 /* QuestionToken */;
-                    case 91 /* openBracket */:
-                        pos++;
-                        return token = 19 /* OpenBracketToken */;
-                    case 93 /* closeBracket */:
-                        pos++;
-                        return token = 20 /* CloseBracketToken */;
-                    case 94 /* caret */:
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            return pos += 2, token = 68 /* CaretEqualsToken */;
-                        }
-                        pos++;
-                        return token = 48 /* CaretToken */;
-                    case 123 /* openBrace */:
-                        pos++;
-                        return token = 15 /* OpenBraceToken */;
-                    case 124 /* bar */:
-                        if (text.charCodeAt(pos + 1) === 124 /* bar */) {
-                            return pos += 2, token = 52 /* BarBarToken */;
-                        }
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            return pos += 2, token = 67 /* BarEqualsToken */;
-                        }
-                        pos++;
-                        return token = 47 /* BarToken */;
-                    case 125 /* closeBrace */:
-                        pos++;
-                        return token = 16 /* CloseBraceToken */;
-                    case 126 /* tilde */:
-                        pos++;
-                        return token = 50 /* TildeToken */;
-                    case 64 /* at */:
-                        pos++;
-                        return token = 55 /* AtToken */;
-                    case 92 /* backslash */:
-                        var cookedChar = peekUnicodeEscape();
-                        if (cookedChar >= 0 && isIdentifierStart(cookedChar, languageVersion)) {
-                            pos += 6;
-                            tokenValue = String.fromCharCode(cookedChar) + scanIdentifierParts();
-                            return token = getIdentifierToken();
-                        }
-                        error(ts.Diagnostics.Invalid_character);
-                        pos++;
-                        return token = 0 /* Unknown */;
-                    default:
-                        if (isIdentifierStart(ch, languageVersion)) {
-                            pos++;
-                            while (pos < end && isIdentifierPart(ch = text.charCodeAt(pos), languageVersion))
-                                pos++;
-                            tokenValue = text.substring(tokenPos, pos);
-                            if (ch === 92 /* backslash */) {
-                                tokenValue += scanIdentifierParts();
-                            }
-                            return token = getIdentifierToken();
-                        }
-                        else if (isWhiteSpaceSingleLine(ch)) {
-                            pos++;
-                            continue;
-                        }
-                        else if (isLineBreak(ch)) {
-                            precedingLineBreak = true;
-                            pos++;
-                            continue;
-                        }
-                        error(ts.Diagnostics.Invalid_character);
-                        pos++;
-                        return token = 0 /* Unknown */;
-                }
+        // Returns true if we should abort parsing.
+        function abortParsingListOrMoveToNextToken(kind) {
+            parseErrorAtCurrentToken(parsingContextErrors(kind));
+            if (isInSomeParsingContext()) {
+                return true;
             }
+            nextToken();
+            return false;
         }
-        function reScanGreaterToken() {
-            if (token === 27 /* GreaterThanToken */) {
-                if (text.charCodeAt(pos) === 62 /* greaterThan */) {
-                    if (text.charCodeAt(pos + 1) === 62 /* greaterThan */) {
-                        if (text.charCodeAt(pos + 2) === 61 /* equals */) {
-                            return pos += 3, token = 65 /* GreaterThanGreaterThanGreaterThanEqualsToken */;
-                        }
-                        return pos += 2, token = 45 /* GreaterThanGreaterThanGreaterThanToken */;
-                    }
-                    if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                        return pos += 2, token = 64 /* GreaterThanGreaterThanEqualsToken */;
-                    }
-                    pos++;
-                    return token = 44 /* GreaterThanGreaterThanToken */;
-                }
-                if (text.charCodeAt(pos) === 61 /* equals */) {
-                    pos++;
-                    return token = 29 /* GreaterThanEqualsToken */;
-                }
+        function parsingContextErrors(context) {
+            switch (context) {
+                case 0 /* SourceElements */: return ts.Diagnostics.Declaration_or_statement_expected;
+                case 1 /* BlockStatements */: return ts.Diagnostics.Declaration_or_statement_expected;
+                case 2 /* SwitchClauses */: return ts.Diagnostics.case_or_default_expected;
+                case 3 /* SwitchClauseStatements */: return ts.Diagnostics.Statement_expected;
+                case 17 /* RestProperties */: // fallthrough
+                case 4 /* TypeMembers */: return ts.Diagnostics.Property_or_signature_expected;
+                case 5 /* ClassMembers */: return ts.Diagnostics.Unexpected_token_A_constructor_method_accessor_or_property_was_expected;
+                case 6 /* EnumMembers */: return ts.Diagnostics.Enum_member_expected;
+                case 7 /* HeritageClauseElement */: return ts.Diagnostics.Expression_expected;
+                case 8 /* VariableDeclarations */: return ts.Diagnostics.Variable_declaration_expected;
+                case 9 /* ObjectBindingElements */: return ts.Diagnostics.Property_destructuring_pattern_expected;
+                case 10 /* ArrayBindingElements */: return ts.Diagnostics.Array_element_destructuring_pattern_expected;
+                case 11 /* ArgumentExpressions */: return ts.Diagnostics.Argument_expression_expected;
+                case 12 /* ObjectLiteralMembers */: return ts.Diagnostics.Property_assignment_expected;
+                case 15 /* ArrayLiteralMembers */: return ts.Diagnostics.Expression_or_comma_expected;
+                case 16 /* Parameters */: return ts.Diagnostics.Parameter_declaration_expected;
+                case 18 /* TypeParameters */: return ts.Diagnostics.Type_parameter_declaration_expected;
+                case 19 /* TypeArguments */: return ts.Diagnostics.Type_argument_expected;
+                case 20 /* TupleElementTypes */: return ts.Diagnostics.Type_expected;
+                case 21 /* HeritageClauses */: return ts.Diagnostics.Unexpected_token_expected;
+                case 22 /* ImportOrExportSpecifiers */: return ts.Diagnostics.Identifier_expected;
+                case 13 /* JsxAttributes */: return ts.Diagnostics.Identifier_expected;
+                case 14 /* JsxChildren */: return ts.Diagnostics.Identifier_expected;
+                case 23 /* JSDocFunctionParameters */: return ts.Diagnostics.Parameter_declaration_expected;
+                case 24 /* JSDocTypeArguments */: return ts.Diagnostics.Type_argument_expected;
+                case 26 /* JSDocTupleTypes */: return ts.Diagnostics.Type_expected;
+                case 25 /* JSDocRecordMembers */: return ts.Diagnostics.Property_assignment_expected;
             }
-            return token;
         }
-        function reScanSlashToken() {
-            if (token === 39 /* SlashToken */ || token === 61 /* SlashEqualsToken */) {
-                var p = tokenPos + 1;
-                var inEscape = false;
-                var inCharacterClass = false;
-                while (true) {
-                    // If we reach the end of a file, or hit a newline, then this is an unterminated
-                    // regex.  Report error and return what we have so far.
-                    if (p >= end) {
-                        tokenIsUnterminated = true;
-                        error(ts.Diagnostics.Unterminated_regular_expression_literal);
-                        break;
-                    }
-                    var ch = text.charCodeAt(p);
-                    if (isLineBreak(ch)) {
-                        tokenIsUnterminated = true;
-                        error(ts.Diagnostics.Unterminated_regular_expression_literal);
-                        break;
-                    }
-                    if (inEscape) {
-                        // Parsing an escape character;
-                        // reset the flag and just advance to the next char.
-                        inEscape = false;
+        // Parses a comma-delimited list of elements
+        function parseDelimitedList(kind, parseElement, considerSemicolonAsDelimiter) {
+            var saveParsingContext = parsingContext;
+            parsingContext |= 1 << kind;
+            var result = createNodeArray();
+            var commaStart = -1; // Meaning the previous token was not a comma
+            while (true) {
+                if (isListElement(kind, /*inErrorRecovery*/ false)) {
+                    result.push(parseListElement(kind, parseElement));
+                    commaStart = scanner.getTokenPos();
+                    if (parseOptional(26 /* CommaToken */)) {
+                        continue;
                     }
-                    else if (ch === 47 /* slash */ && !inCharacterClass) {
-                        // A slash within a character class is permissible,
-                        // but in general it signals the end of the regexp literal.
-                        p++;
+                    commaStart = -1; // Back to the state where the last token was not a comma
+                    if (isListTerminator(kind)) {
                         break;
                     }
-                    else if (ch === 91 /* openBracket */) {
-                        inCharacterClass = true;
-                    }
-                    else if (ch === 92 /* backslash */) {
-                        inEscape = true;
-                    }
-                    else if (ch === 93 /* closeBracket */) {
-                        inCharacterClass = false;
+                    // We didn't get a comma, and the list wasn't terminated, explicitly parse
+                    // out a comma so we give a good error message.
+                    parseExpected(26 /* CommaToken */);
+                    // If the token was a semicolon, and the caller allows that, then skip it and
+                    // continue.  This ensures we get back on track and don't result in tons of
+                    // parse errors.  For example, this can happen when people do things like use
+                    // a semicolon to delimit object literal members.   Note: we'll have already
+                    // reported an error when we called parseExpected above.
+                    if (considerSemicolonAsDelimiter && token() === 25 /* SemicolonToken */ && !scanner.hasPrecedingLineBreak()) {
+                        nextToken();
                     }
-                    p++;
+                    continue;
                 }
-                while (p < end && isIdentifierPart(text.charCodeAt(p), languageVersion)) {
-                    p++;
+                if (isListTerminator(kind)) {
+                    break;
+                }
+                if (abortParsingListOrMoveToNextToken(kind)) {
+                    break;
                 }
-                pos = p;
-                tokenValue = text.substring(tokenPos, pos);
-                token = 10 /* RegularExpressionLiteral */;
             }
-            return token;
+            // Recording the trailing comma is deliberately done after the previous
+            // loop, and not just if we see a list terminator. This is because the list
+            // may have ended incorrectly, but it is still important to know if there
+            // was a trailing comma.
+            // Check if the last token was a comma.
+            if (commaStart >= 0) {
+                // Always preserve a trailing comma by marking it on the NodeArray
+                result.hasTrailingComma = true;
+            }
+            result.end = getNodeEnd();
+            parsingContext = saveParsingContext;
+            return result;
         }
-        /**
-         * Unconditionally back up and scan a template expression portion.
-         */
-        function reScanTemplateToken() {
-            ts.Debug.assert(token === 16 /* CloseBraceToken */, "'reScanTemplateToken' should only be called on a '}'");
-            pos = tokenPos;
-            return token = scanTemplateAndSetTokenValue();
+        function createMissingList() {
+            return createNodeArray();
         }
-        function reScanJsxToken() {
-            pos = tokenPos = startPos;
-            return token = scanJsxToken();
+        function parseBracketedList(kind, parseElement, open, close) {
+            if (parseExpected(open)) {
+                var result = parseDelimitedList(kind, parseElement);
+                parseExpected(close);
+                return result;
+            }
+            return createMissingList();
         }
-        function scanJsxToken() {
-            startPos = tokenPos = pos;
-            if (pos >= end) {
-                return token = 1 /* EndOfFileToken */;
+        // The allowReservedWords parameter controls whether reserved words are permitted after the first dot
+        function parseEntityName(allowReservedWords, diagnosticMessage) {
+            var entity = parseIdentifier(diagnosticMessage);
+            while (parseOptional(23 /* DotToken */)) {
+                var node = createNode(143 /* QualifiedName */, entity.pos); // !!!
+                node.left = entity;
+                node.right = parseRightSideOfDot(allowReservedWords);
+                entity = finishNode(node);
             }
-            var char = text.charCodeAt(pos);
-            if (char === 60 /* lessThan */) {
-                if (text.charCodeAt(pos + 1) === 47 /* slash */) {
-                    pos += 2;
-                    return token = 26 /* LessThanSlashToken */;
+            return entity;
+        }
+        function parseRightSideOfDot(allowIdentifierNames) {
+            // Technically a keyword is valid here as all identifiers and keywords are identifier names.
+            // However, often we'll encounter this in error situations when the identifier or keyword
+            // is actually starting another valid construct.
+            //
+            // So, we check for the following specific case:
+            //
+            //      name.
+            //      identifierOrKeyword identifierNameOrKeyword
+            //
+            // Note: the newlines are important here.  For example, if that above code
+            // were rewritten into:
+            //
+            //      name.identifierOrKeyword
+            //      identifierNameOrKeyword
+            //
+            // Then we would consider it valid.  That's because ASI would take effect and
+            // the code would be implicitly: "name.identifierOrKeyword; identifierNameOrKeyword".
+            // In the first case though, ASI will not take effect because there is not a
+            // line terminator after the identifier or keyword.
+            if (scanner.hasPrecedingLineBreak() && ts.tokenIsIdentifierOrKeyword(token())) {
+                var matchesPattern = lookAhead(nextTokenIsIdentifierOrKeywordOnSameLine);
+                if (matchesPattern) {
+                    // Report that we need an identifier.  However, report it right after the dot,
+                    // and not on the next token.  This is because the next token might actually
+                    // be an identifier and the error would be quite confusing.
+                    return createMissingNode(71 /* Identifier */, /*reportAtCurrentPosition*/ true, ts.Diagnostics.Identifier_expected);
                 }
-                pos++;
-                return token = 25 /* LessThanToken */;
             }
-            if (char === 123 /* openBrace */) {
-                pos++;
-                return token = 15 /* OpenBraceToken */;
+            return allowIdentifierNames ? parseIdentifierName() : parseIdentifier();
+        }
+        function parseTemplateExpression() {
+            var template = createNode(196 /* TemplateExpression */);
+            template.head = parseTemplateHead();
+            ts.Debug.assert(template.head.kind === 14 /* TemplateHead */, "Template head has wrong token kind");
+            var templateSpans = createNodeArray();
+            do {
+                templateSpans.push(parseTemplateSpan());
+            } while (ts.lastOrUndefined(templateSpans).literal.kind === 15 /* TemplateMiddle */);
+            templateSpans.end = getNodeEnd();
+            template.templateSpans = templateSpans;
+            return finishNode(template);
+        }
+        function parseTemplateSpan() {
+            var span = createNode(205 /* TemplateSpan */);
+            span.expression = allowInAnd(parseExpression);
+            var literal;
+            if (token() === 18 /* CloseBraceToken */) {
+                reScanTemplateToken();
+                literal = parseTemplateMiddleOrTemplateTail();
             }
-            while (pos < end) {
-                pos++;
-                char = text.charCodeAt(pos);
-                if ((char === 123 /* openBrace */) || (char === 60 /* lessThan */)) {
-                    break;
+            else {
+                literal = parseExpectedToken(16 /* TemplateTail */, /*reportAtCurrentPosition*/ false, ts.Diagnostics._0_expected, ts.tokenToString(18 /* CloseBraceToken */));
+            }
+            span.literal = literal;
+            return finishNode(span);
+        }
+        function parseLiteralNode(internName) {
+            return parseLiteralLikeNode(token(), internName);
+        }
+        function parseTemplateHead() {
+            var fragment = parseLiteralLikeNode(token(), /*internName*/ false);
+            ts.Debug.assert(fragment.kind === 14 /* TemplateHead */, "Template head has wrong token kind");
+            return fragment;
+        }
+        function parseTemplateMiddleOrTemplateTail() {
+            var fragment = parseLiteralLikeNode(token(), /*internName*/ false);
+            ts.Debug.assert(fragment.kind === 15 /* TemplateMiddle */ || fragment.kind === 16 /* TemplateTail */, "Template fragment has wrong token kind");
+            return fragment;
+        }
+        function parseLiteralLikeNode(kind, internName) {
+            var node = createNode(kind);
+            var text = scanner.getTokenValue();
+            node.text = internName ? internIdentifier(text) : text;
+            if (scanner.hasExtendedUnicodeEscape()) {
+                node.hasExtendedUnicodeEscape = true;
+            }
+            if (scanner.isUnterminated()) {
+                node.isUnterminated = true;
+            }
+            // Octal literals are not allowed in strict mode or ES5
+            // Note that theoretically the following condition would hold true literals like 009,
+            // which is not octal.But because of how the scanner separates the tokens, we would
+            // never get a token like this. Instead, we would get 00 and 9 as two separate tokens.
+            // We also do not need to check for negatives because any prefix operator would be part of a
+            // parent unary expression.
+            if (node.kind === 8 /* NumericLiteral */) {
+                node.numericLiteralFlags = scanner.getNumericLiteralFlags();
+            }
+            nextToken();
+            finishNode(node);
+            return node;
+        }
+        // TYPES
+        function parseTypeReference() {
+            var node = createNode(159 /* TypeReference */);
+            node.typeName = parseEntityName(/*allowReservedWords*/ false, ts.Diagnostics.Type_expected);
+            if (!scanner.hasPrecedingLineBreak() && token() === 27 /* LessThanToken */) {
+                node.typeArguments = parseBracketedList(19 /* TypeArguments */, parseType, 27 /* LessThanToken */, 29 /* GreaterThanToken */);
+            }
+            return finishNode(node);
+        }
+        function parseThisTypePredicate(lhs) {
+            nextToken();
+            var node = createNode(158 /* TypePredicate */, lhs.pos);
+            node.parameterName = lhs;
+            node.type = parseType();
+            return finishNode(node);
+        }
+        function parseThisTypeNode() {
+            var node = createNode(169 /* ThisType */);
+            nextToken();
+            return finishNode(node);
+        }
+        function parseTypeQuery() {
+            var node = createNode(162 /* TypeQuery */);
+            parseExpected(103 /* TypeOfKeyword */);
+            node.exprName = parseEntityName(/*allowReservedWords*/ true);
+            return finishNode(node);
+        }
+        function parseTypeParameter() {
+            var node = createNode(145 /* TypeParameter */);
+            node.name = parseIdentifier();
+            if (parseOptional(85 /* ExtendsKeyword */)) {
+                // It's not uncommon for people to write improper constraints to a generic.  If the
+                // user writes a constraint that is an expression and not an actual type, then parse
+                // it out as an expression (so we can recover well), but report that a type is needed
+                // instead.
+                if (isStartOfType() || !isStartOfExpression()) {
+                    node.constraint = parseType();
+                }
+                else {
+                    // It was not a type, and it looked like an expression.  Parse out an expression
+                    // here so we recover well.  Note: it is important that we call parseUnaryExpression
+                    // and not parseExpression here.  If the user has:
+                    //
+                    //      <T extends "">
+                    //
+                    // We do *not* want to consume the  >  as we're consuming the expression for "".
+                    node.expression = parseUnaryExpressionOrHigher();
                 }
             }
-            return token = 244 /* JsxText */;
+            if (parseOptional(58 /* EqualsToken */)) {
+                node.default = parseType();
+            }
+            return finishNode(node);
+        }
+        function parseTypeParameters() {
+            if (token() === 27 /* LessThanToken */) {
+                return parseBracketedList(18 /* TypeParameters */, parseTypeParameter, 27 /* LessThanToken */, 29 /* GreaterThanToken */);
+            }
         }
-        // Scans a JSX identifier; these differ from normal identifiers in that
-        // they allow dashes
-        function scanJsxIdentifier() {
-            if (tokenIsIdentifierOrKeyword(token)) {
-                var firstCharPosition = pos;
-                while (pos < end) {
-                    var ch = text.charCodeAt(pos);
-                    if (ch === 45 /* minus */ || ((firstCharPosition === pos) ? isIdentifierStart(ch, languageVersion) : isIdentifierPart(ch, languageVersion))) {
-                        pos++;
-                    }
-                    else {
-                        break;
-                    }
+        function parseParameterType() {
+            if (parseOptional(56 /* ColonToken */)) {
+                return parseType();
+            }
+            return undefined;
+        }
+        function isStartOfParameter() {
+            return token() === 24 /* DotDotDotToken */ || isIdentifierOrPattern() || ts.isModifierKind(token()) || token() === 57 /* AtToken */ || token() === 99 /* ThisKeyword */;
+        }
+        function parseParameter() {
+            var node = createNode(146 /* Parameter */);
+            if (token() === 99 /* ThisKeyword */) {
+                node.name = createIdentifier(/*isIdentifier*/ true);
+                node.type = parseParameterType();
+                return finishNode(node);
+            }
+            node.decorators = parseDecorators();
+            node.modifiers = parseModifiers();
+            node.dotDotDotToken = parseOptionalToken(24 /* DotDotDotToken */);
+            // FormalParameter [Yield,Await]:
+            //      BindingElement[?Yield,?Await]
+            node.name = parseIdentifierOrPattern();
+            if (ts.getFullWidth(node.name) === 0 && !ts.hasModifiers(node) && ts.isModifierKind(token())) {
+                // in cases like
+                // 'use strict'
+                // function foo(static)
+                // isParameter('static') === true, because of isModifier('static')
+                // however 'static' is not a legal identifier in a strict mode.
+                // so result of this function will be ParameterDeclaration (flags = 0, name = missing, type = undefined, initializer = undefined)
+                // and current token will not change => parsing of the enclosing parameter list will last till the end of time (or OOM)
+                // to avoid this we'll advance cursor to the next token.
+                nextToken();
+            }
+            node.questionToken = parseOptionalToken(55 /* QuestionToken */);
+            node.type = parseParameterType();
+            node.initializer = parseBindingElementInitializer(/*inParameter*/ true);
+            // Do not check for initializers in an ambient context for parameters. This is not
+            // a grammar error because the grammar allows arbitrary call signatures in
+            // an ambient context.
+            // It is actually not necessary for this to be an error at all. The reason is that
+            // function/constructor implementations are syntactically disallowed in ambient
+            // contexts. In addition, parameter initializers are semantically disallowed in
+            // overload signatures. So parameter initializers are transitively disallowed in
+            // ambient contexts.
+            return addJSDocComment(finishNode(node));
+        }
+        function parseBindingElementInitializer(inParameter) {
+            return inParameter ? parseParameterInitializer() : parseNonParameterInitializer();
+        }
+        function parseParameterInitializer() {
+            return parseInitializer(/*inParameter*/ true);
+        }
+        function fillSignature(returnToken, yieldContext, awaitContext, requireCompleteParameterList, signature) {
+            var returnTokenRequired = returnToken === 36 /* EqualsGreaterThanToken */;
+            signature.typeParameters = parseTypeParameters();
+            signature.parameters = parseParameterList(yieldContext, awaitContext, requireCompleteParameterList);
+            if (returnTokenRequired) {
+                parseExpected(returnToken);
+                signature.type = parseTypeOrTypePredicate();
+            }
+            else if (parseOptional(returnToken)) {
+                signature.type = parseTypeOrTypePredicate();
+            }
+        }
+        function parseParameterList(yieldContext, awaitContext, requireCompleteParameterList) {
+            // FormalParameters [Yield,Await]: (modified)
+            //      [empty]
+            //      FormalParameterList[?Yield,Await]
+            //
+            // FormalParameter[Yield,Await]: (modified)
+            //      BindingElement[?Yield,Await]
+            //
+            // BindingElement [Yield,Await]: (modified)
+            //      SingleNameBinding[?Yield,?Await]
+            //      BindingPattern[?Yield,?Await]Initializer [In, ?Yield,?Await] opt
+            //
+            // SingleNameBinding [Yield,Await]:
+            //      BindingIdentifier[?Yield,?Await]Initializer [In, ?Yield,?Await] opt
+            if (parseExpected(19 /* OpenParenToken */)) {
+                var savedYieldContext = inYieldContext();
+                var savedAwaitContext = inAwaitContext();
+                setYieldContext(yieldContext);
+                setAwaitContext(awaitContext);
+                var result = parseDelimitedList(16 /* Parameters */, parseParameter);
+                setYieldContext(savedYieldContext);
+                setAwaitContext(savedAwaitContext);
+                if (!parseExpected(20 /* CloseParenToken */) && requireCompleteParameterList) {
+                    // Caller insisted that we had to end with a )   We didn't.  So just return
+                    // undefined here.
+                    return undefined;
                 }
-                tokenValue += text.substr(firstCharPosition, pos - firstCharPosition);
+                return result;
             }
-            return token;
+            // We didn't even have an open paren.  If the caller requires a complete parameter list,
+            // we definitely can't provide that.  However, if they're ok with an incomplete one,
+            // then just return an empty set of parameters.
+            return requireCompleteParameterList ? undefined : createMissingList();
         }
-        function scanJsxAttributeValue() {
-            startPos = pos;
-            switch (text.charCodeAt(pos)) {
-                case 34 /* doubleQuote */:
-                case 39 /* singleQuote */:
-                    tokenValue = scanString(/*allowEscapes*/ false);
-                    return token = 9 /* StringLiteral */;
-                default:
-                    // If this scans anything other than `{`, it's a parse error.
-                    return scan();
+        function parseTypeMemberSemicolon() {
+            // We allow type members to be separated by commas or (possibly ASI) semicolons.
+            // First check if it was a comma.  If so, we're done with the member.
+            if (parseOptional(26 /* CommaToken */)) {
+                return;
             }
+            // Didn't have a comma.  We must have a (possible ASI) semicolon.
+            parseSemicolon();
         }
-        function scanJSDocToken() {
-            if (pos >= end) {
-                return token = 1 /* EndOfFileToken */;
+        function parseSignatureMember(kind) {
+            var node = createNode(kind);
+            if (kind === 156 /* ConstructSignature */) {
+                parseExpected(94 /* NewKeyword */);
             }
-            startPos = pos;
-            tokenPos = pos;
-            var ch = text.charCodeAt(pos);
-            switch (ch) {
-                case 9 /* tab */:
-                case 11 /* verticalTab */:
-                case 12 /* formFeed */:
-                case 32 /* space */:
-                    while (pos < end && isWhiteSpaceSingleLine(text.charCodeAt(pos))) {
-                        pos++;
-                    }
-                    return token = 5 /* WhitespaceTrivia */;
-                case 64 /* at */:
-                    pos++;
-                    return token = 55 /* AtToken */;
-                case 10 /* lineFeed */:
-                case 13 /* carriageReturn */:
-                    pos++;
-                    return token = 4 /* NewLineTrivia */;
-                case 42 /* asterisk */:
-                    pos++;
-                    return token = 37 /* AsteriskToken */;
-                case 123 /* openBrace */:
-                    pos++;
-                    return token = 15 /* OpenBraceToken */;
-                case 125 /* closeBrace */:
-                    pos++;
-                    return token = 16 /* CloseBraceToken */;
-                case 91 /* openBracket */:
-                    pos++;
-                    return token = 19 /* OpenBracketToken */;
-                case 93 /* closeBracket */:
-                    pos++;
-                    return token = 20 /* CloseBracketToken */;
-                case 61 /* equals */:
-                    pos++;
-                    return token = 56 /* EqualsToken */;
-                case 44 /* comma */:
-                    pos++;
-                    return token = 24 /* CommaToken */;
+            fillSignature(56 /* ColonToken */, /*yieldContext*/ false, /*awaitContext*/ false, /*requireCompleteParameterList*/ false, node);
+            parseTypeMemberSemicolon();
+            return addJSDocComment(finishNode(node));
+        }
+        function isIndexSignature() {
+            if (token() !== 21 /* OpenBracketToken */) {
+                return false;
             }
-            if (isIdentifierStart(ch, 2 /* Latest */)) {
-                pos++;
-                while (isIdentifierPart(text.charCodeAt(pos), 2 /* Latest */) && pos < end) {
-                    pos++;
+            return lookAhead(isUnambiguouslyIndexSignature);
+        }
+        function isUnambiguouslyIndexSignature() {
+            // The only allowed sequence is:
+            //
+            //   [id:
+            //
+            // However, for error recovery, we also check the following cases:
+            //
+            //   [...
+            //   [id,
+            //   [id?,
+            //   [id?:
+            //   [id?]
+            //   [public id
+            //   [private id
+            //   [protected id
+            //   []
+            //
+            nextToken();
+            if (token() === 24 /* DotDotDotToken */ || token() === 22 /* CloseBracketToken */) {
+                return true;
+            }
+            if (ts.isModifierKind(token())) {
+                nextToken();
+                if (isIdentifier()) {
+                    return true;
                 }
-                return token = 69 /* Identifier */;
+            }
+            else if (!isIdentifier()) {
+                return false;
             }
             else {
-                return pos += 1, token = 0 /* Unknown */;
+                // Skip the identifier
+                nextToken();
+            }
+            // A colon signifies a well formed indexer
+            // A comma should be a badly formed indexer because comma expressions are not allowed
+            // in computed properties.
+            if (token() === 56 /* ColonToken */ || token() === 26 /* CommaToken */) {
+                return true;
             }
+            // Question mark could be an indexer with an optional property,
+            // or it could be a conditional expression in a computed property.
+            if (token() !== 55 /* QuestionToken */) {
+                return false;
+            }
+            // If any of the following tokens are after the question mark, it cannot
+            // be a conditional expression, so treat it as an indexer.
+            nextToken();
+            return token() === 56 /* ColonToken */ || token() === 26 /* CommaToken */ || token() === 22 /* CloseBracketToken */;
         }
-        function speculationHelper(callback, isLookahead) {
-            var savePos = pos;
-            var saveStartPos = startPos;
-            var saveTokenPos = tokenPos;
-            var saveToken = token;
-            var saveTokenValue = tokenValue;
-            var savePrecedingLineBreak = precedingLineBreak;
-            var result = callback();
-            // If our callback returned something 'falsy' or we're just looking ahead,
-            // then unconditionally restore us to where we were.
-            if (!result || isLookahead) {
-                pos = savePos;
-                startPos = saveStartPos;
-                tokenPos = saveTokenPos;
-                token = saveToken;
-                tokenValue = saveTokenValue;
-                precedingLineBreak = savePrecedingLineBreak;
+        function parseIndexSignatureDeclaration(fullStart, decorators, modifiers) {
+            var node = createNode(157 /* IndexSignature */, fullStart);
+            node.decorators = decorators;
+            node.modifiers = modifiers;
+            node.parameters = parseBracketedList(16 /* Parameters */, parseParameter, 21 /* OpenBracketToken */, 22 /* CloseBracketToken */);
+            node.type = parseTypeAnnotation();
+            parseTypeMemberSemicolon();
+            return finishNode(node);
+        }
+        function parsePropertyOrMethodSignature(fullStart, modifiers) {
+            var name = parsePropertyName();
+            var questionToken = parseOptionalToken(55 /* QuestionToken */);
+            if (token() === 19 /* OpenParenToken */ || token() === 27 /* LessThanToken */) {
+                var method = createNode(150 /* MethodSignature */, fullStart);
+                method.modifiers = modifiers;
+                method.name = name;
+                method.questionToken = questionToken;
+                // Method signatures don't exist in expression contexts.  So they have neither
+                // [Yield] nor [Await]
+                fillSignature(56 /* ColonToken */, /*yieldContext*/ false, /*awaitContext*/ false, /*requireCompleteParameterList*/ false, method);
+                parseTypeMemberSemicolon();
+                return addJSDocComment(finishNode(method));
+            }
+            else {
+                var property = createNode(148 /* PropertySignature */, fullStart);
+                property.modifiers = modifiers;
+                property.name = name;
+                property.questionToken = questionToken;
+                property.type = parseTypeAnnotation();
+                if (token() === 58 /* EqualsToken */) {
+                    // Although type literal properties cannot not have initializers, we attempt
+                    // to parse an initializer so we can report in the checker that an interface
+                    // property or type literal property cannot have an initializer.
+                    property.initializer = parseNonParameterInitializer();
+                }
+                parseTypeMemberSemicolon();
+                return addJSDocComment(finishNode(property));
+            }
+        }
+        function isTypeMemberStart() {
+            // Return true if we have the start of a signature member
+            if (token() === 19 /* OpenParenToken */ || token() === 27 /* LessThanToken */) {
+                return true;
+            }
+            var idToken;
+            // Eat up all modifiers, but hold on to the last one in case it is actually an identifier
+            while (ts.isModifierKind(token())) {
+                idToken = true;
+                nextToken();
+            }
+            // Index signatures and computed property names are type members
+            if (token() === 21 /* OpenBracketToken */) {
+                return true;
+            }
+            // Try to get the first property-like token following all modifiers
+            if (isLiteralPropertyName()) {
+                idToken = true;
+                nextToken();
+            }
+            // If we were able to get any potential identifier, check that it is
+            // the start of a member declaration
+            if (idToken) {
+                return token() === 19 /* OpenParenToken */ ||
+                    token() === 27 /* LessThanToken */ ||
+                    token() === 55 /* QuestionToken */ ||
+                    token() === 56 /* ColonToken */ ||
+                    token() === 26 /* CommaToken */ ||
+                    canParseSemicolon();
+            }
+            return false;
+        }
+        function parseTypeMember() {
+            if (token() === 19 /* OpenParenToken */ || token() === 27 /* LessThanToken */) {
+                return parseSignatureMember(155 /* CallSignature */);
+            }
+            if (token() === 94 /* NewKeyword */ && lookAhead(nextTokenIsOpenParenOrLessThan)) {
+                return parseSignatureMember(156 /* ConstructSignature */);
+            }
+            var fullStart = getNodePos();
+            var modifiers = parseModifiers();
+            if (isIndexSignature()) {
+                return parseIndexSignatureDeclaration(fullStart, /*decorators*/ undefined, modifiers);
+            }
+            return parsePropertyOrMethodSignature(fullStart, modifiers);
+        }
+        function nextTokenIsOpenParenOrLessThan() {
+            nextToken();
+            return token() === 19 /* OpenParenToken */ || token() === 27 /* LessThanToken */;
+        }
+        function parseTypeLiteral() {
+            var node = createNode(163 /* TypeLiteral */);
+            node.members = parseObjectTypeMembers();
+            return finishNode(node);
+        }
+        function parseObjectTypeMembers() {
+            var members;
+            if (parseExpected(17 /* OpenBraceToken */)) {
+                members = parseList(4 /* TypeMembers */, parseTypeMember);
+                parseExpected(18 /* CloseBraceToken */);
+            }
+            else {
+                members = createMissingList();
+            }
+            return members;
+        }
+        function isStartOfMappedType() {
+            nextToken();
+            if (token() === 131 /* ReadonlyKeyword */) {
+                nextToken();
             }
-            return result;
+            return token() === 21 /* OpenBracketToken */ && nextTokenIsIdentifier() && nextToken() === 92 /* InKeyword */;
         }
-        function scanRange(start, length, callback) {
-            var saveEnd = end;
-            var savePos = pos;
-            var saveStartPos = startPos;
-            var saveTokenPos = tokenPos;
-            var saveToken = token;
-            var savePrecedingLineBreak = precedingLineBreak;
-            var saveTokenValue = tokenValue;
-            var saveHasExtendedUnicodeEscape = hasExtendedUnicodeEscape;
-            var saveTokenIsUnterminated = tokenIsUnterminated;
-            setText(text, start, length);
-            var result = callback();
-            end = saveEnd;
-            pos = savePos;
-            startPos = saveStartPos;
-            tokenPos = saveTokenPos;
-            token = saveToken;
-            precedingLineBreak = savePrecedingLineBreak;
-            tokenValue = saveTokenValue;
-            hasExtendedUnicodeEscape = saveHasExtendedUnicodeEscape;
-            tokenIsUnterminated = saveTokenIsUnterminated;
-            return result;
+        function parseMappedTypeParameter() {
+            var node = createNode(145 /* TypeParameter */);
+            node.name = parseIdentifier();
+            parseExpected(92 /* InKeyword */);
+            node.constraint = parseType();
+            return finishNode(node);
         }
-        function lookAhead(callback) {
-            return speculationHelper(callback, /*isLookahead*/ true);
+        function parseMappedType() {
+            var node = createNode(172 /* MappedType */);
+            parseExpected(17 /* OpenBraceToken */);
+            node.readonlyToken = parseOptionalToken(131 /* ReadonlyKeyword */);
+            parseExpected(21 /* OpenBracketToken */);
+            node.typeParameter = parseMappedTypeParameter();
+            parseExpected(22 /* CloseBracketToken */);
+            node.questionToken = parseOptionalToken(55 /* QuestionToken */);
+            node.type = parseTypeAnnotation();
+            parseSemicolon();
+            parseExpected(18 /* CloseBraceToken */);
+            return finishNode(node);
         }
-        function tryScan(callback) {
-            return speculationHelper(callback, /*isLookahead*/ false);
+        function parseTupleType() {
+            var node = createNode(165 /* TupleType */);
+            node.elementTypes = parseBracketedList(20 /* TupleElementTypes */, parseType, 21 /* OpenBracketToken */, 22 /* CloseBracketToken */);
+            return finishNode(node);
         }
-        function getText() {
-            return text;
+        function parseParenthesizedType() {
+            var node = createNode(168 /* ParenthesizedType */);
+            parseExpected(19 /* OpenParenToken */);
+            node.type = parseType();
+            parseExpected(20 /* CloseParenToken */);
+            return finishNode(node);
         }
-        function setText(newText, start, length) {
-            text = newText || "";
-            end = length === undefined ? text.length : start + length;
-            setTextPos(start || 0);
+        function parseFunctionOrConstructorType(kind) {
+            var node = createNode(kind);
+            if (kind === 161 /* ConstructorType */) {
+                parseExpected(94 /* NewKeyword */);
+            }
+            fillSignature(36 /* EqualsGreaterThanToken */, /*yieldContext*/ false, /*awaitContext*/ false, /*requireCompleteParameterList*/ false, node);
+            return finishNode(node);
         }
-        function setOnError(errorCallback) {
-            onError = errorCallback;
+        function parseKeywordAndNoDot() {
+            var node = parseTokenNode();
+            return token() === 23 /* DotToken */ ? undefined : node;
         }
-        function setScriptTarget(scriptTarget) {
-            languageVersion = scriptTarget;
+        function parseLiteralTypeNode() {
+            var node = createNode(173 /* LiteralType */);
+            node.literal = parseSimpleUnaryExpression();
+            finishNode(node);
+            return node;
         }
-        function setLanguageVariant(variant) {
-            languageVariant = variant;
+        function nextTokenIsNumericLiteral() {
+            return nextToken() === 8 /* NumericLiteral */;
         }
-        function setTextPos(textPos) {
-            ts.Debug.assert(textPos >= 0);
-            pos = textPos;
-            startPos = textPos;
-            tokenPos = textPos;
-            token = 0 /* Unknown */;
-            precedingLineBreak = false;
-            tokenValue = undefined;
-            hasExtendedUnicodeEscape = false;
-            tokenIsUnterminated = false;
+        function parseNonArrayType() {
+            switch (token()) {
+                case 119 /* AnyKeyword */:
+                case 136 /* StringKeyword */:
+                case 133 /* NumberKeyword */:
+                case 122 /* BooleanKeyword */:
+                case 137 /* SymbolKeyword */:
+                case 139 /* UndefinedKeyword */:
+                case 130 /* NeverKeyword */:
+                case 134 /* ObjectKeyword */:
+                    // If these are followed by a dot, then parse these out as a dotted type reference instead.
+                    var node = tryParse(parseKeywordAndNoDot);
+                    return node || parseTypeReference();
+                case 9 /* StringLiteral */:
+                case 8 /* NumericLiteral */:
+                case 101 /* TrueKeyword */:
+                case 86 /* FalseKeyword */:
+                    return parseLiteralTypeNode();
+                case 38 /* MinusToken */:
+                    return lookAhead(nextTokenIsNumericLiteral) ? parseLiteralTypeNode() : parseTypeReference();
+                case 105 /* VoidKeyword */:
+                case 95 /* NullKeyword */:
+                    return parseTokenNode();
+                case 99 /* ThisKeyword */: {
+                    var thisKeyword = parseThisTypeNode();
+                    if (token() === 126 /* IsKeyword */ && !scanner.hasPrecedingLineBreak()) {
+                        return parseThisTypePredicate(thisKeyword);
+                    }
+                    else {
+                        return thisKeyword;
+                    }
+                }
+                case 103 /* TypeOfKeyword */:
+                    return parseTypeQuery();
+                case 17 /* OpenBraceToken */:
+                    return lookAhead(isStartOfMappedType) ? parseMappedType() : parseTypeLiteral();
+                case 21 /* OpenBracketToken */:
+                    return parseTupleType();
+                case 19 /* OpenParenToken */:
+                    return parseParenthesizedType();
+                default:
+                    return parseTypeReference();
+            }
         }
-    }
-    ts.createScanner = createScanner;
-})(ts || (ts = {}));
-/// <reference path="core.ts"/>
-/// <reference path="utilities.ts"/>
-/* @internal */
-var ts;
-(function (ts) {
-    var NodeConstructor;
-    var SourceFileConstructor;
-    function createNode(kind, location, flags) {
-        var ConstructorForKind = kind === 256 /* SourceFile */
-            ? (SourceFileConstructor || (SourceFileConstructor = ts.objectAllocator.getSourceFileConstructor()))
-            : (NodeConstructor || (NodeConstructor = ts.objectAllocator.getNodeConstructor()));
-        var node = location
-            ? new ConstructorForKind(kind, location.pos, location.end)
-            : new ConstructorForKind(kind, /*pos*/ -1, /*end*/ -1);
-        node.flags = flags | 8 /* Synthesized */;
-        return node;
-    }
-    function updateNode(updated, original) {
-        if (updated !== original) {
-            setOriginalNode(updated, original);
-            if (original.startsOnNewLine) {
-                updated.startsOnNewLine = true;
+        function isStartOfType() {
+            switch (token()) {
+                case 119 /* AnyKeyword */:
+                case 136 /* StringKeyword */:
+                case 133 /* NumberKeyword */:
+                case 122 /* BooleanKeyword */:
+                case 137 /* SymbolKeyword */:
+                case 105 /* VoidKeyword */:
+                case 139 /* UndefinedKeyword */:
+                case 95 /* NullKeyword */:
+                case 99 /* ThisKeyword */:
+                case 103 /* TypeOfKeyword */:
+                case 130 /* NeverKeyword */:
+                case 17 /* OpenBraceToken */:
+                case 21 /* OpenBracketToken */:
+                case 27 /* LessThanToken */:
+                case 49 /* BarToken */:
+                case 48 /* AmpersandToken */:
+                case 94 /* NewKeyword */:
+                case 9 /* StringLiteral */:
+                case 8 /* NumericLiteral */:
+                case 101 /* TrueKeyword */:
+                case 86 /* FalseKeyword */:
+                case 134 /* ObjectKeyword */:
+                    return true;
+                case 38 /* MinusToken */:
+                    return lookAhead(nextTokenIsNumericLiteral);
+                case 19 /* OpenParenToken */:
+                    // Only consider '(' the start of a type if followed by ')', '...', an identifier, a modifier,
+                    // or something that starts a type. We don't want to consider things like '(1)' a type.
+                    return lookAhead(isStartOfParenthesizedOrFunctionType);
+                default:
+                    return isIdentifier();
             }
-            ts.aggregateTransformFlags(updated);
         }
-        return updated;
-    }
-    ts.updateNode = updateNode;
-    function createNodeArray(elements, location, hasTrailingComma) {
-        if (elements) {
-            if (ts.isNodeArray(elements)) {
-                return elements;
+        function isStartOfParenthesizedOrFunctionType() {
+            nextToken();
+            return token() === 20 /* CloseParenToken */ || isStartOfParameter() || isStartOfType();
+        }
+        function parseArrayTypeOrHigher() {
+            var type = parseNonArrayType();
+            while (!scanner.hasPrecedingLineBreak() && parseOptional(21 /* OpenBracketToken */)) {
+                if (isStartOfType()) {
+                    var node = createNode(171 /* IndexedAccessType */, type.pos);
+                    node.objectType = type;
+                    node.indexType = parseType();
+                    parseExpected(22 /* CloseBracketToken */);
+                    type = finishNode(node);
+                }
+                else {
+                    var node = createNode(164 /* ArrayType */, type.pos);
+                    node.elementType = type;
+                    parseExpected(22 /* CloseBracketToken */);
+                    type = finishNode(node);
+                }
             }
+            return type;
         }
-        else {
-            elements = [];
+        function parseTypeOperator(operator) {
+            var node = createNode(170 /* TypeOperator */);
+            parseExpected(operator);
+            node.operator = operator;
+            node.type = parseTypeOperatorOrHigher();
+            return finishNode(node);
         }
-        var array = elements;
-        if (location) {
-            array.pos = location.pos;
-            array.end = location.end;
+        function parseTypeOperatorOrHigher() {
+            switch (token()) {
+                case 127 /* KeyOfKeyword */:
+                    return parseTypeOperator(127 /* KeyOfKeyword */);
+            }
+            return parseArrayTypeOrHigher();
         }
-        else {
-            array.pos = -1;
-            array.end = -1;
+        function parseUnionOrIntersectionType(kind, parseConstituentType, operator) {
+            parseOptional(operator);
+            var type = parseConstituentType();
+            if (token() === operator) {
+                var types = createNodeArray([type], type.pos);
+                while (parseOptional(operator)) {
+                    types.push(parseConstituentType());
+                }
+                types.end = getNodeEnd();
+                var node = createNode(kind, type.pos);
+                node.types = types;
+                type = finishNode(node);
+            }
+            return type;
         }
-        if (hasTrailingComma) {
-            array.hasTrailingComma = true;
+        function parseIntersectionTypeOrHigher() {
+            return parseUnionOrIntersectionType(167 /* IntersectionType */, parseTypeOperatorOrHigher, 48 /* AmpersandToken */);
         }
-        return array;
-    }
-    ts.createNodeArray = createNodeArray;
-    function createSynthesizedNode(kind, startsOnNewLine) {
-        var node = createNode(kind, /*location*/ undefined);
-        node.startsOnNewLine = startsOnNewLine;
-        return node;
-    }
-    ts.createSynthesizedNode = createSynthesizedNode;
-    function createSynthesizedNodeArray(elements) {
-        return createNodeArray(elements, /*location*/ undefined);
-    }
-    ts.createSynthesizedNodeArray = createSynthesizedNodeArray;
-    /**
-     * Creates a shallow, memberwise clone of a node with no source map location.
-     */
-    function getSynthesizedClone(node) {
-        // We don't use "clone" from core.ts here, as we need to preserve the prototype chain of
-        // the original node. We also need to exclude specific properties and only include own-
-        // properties (to skip members already defined on the shared prototype).
-        var clone = createNode(node.kind, /*location*/ undefined, node.flags);
-        setOriginalNode(clone, node);
-        for (var key in node) {
-            if (clone.hasOwnProperty(key) || !node.hasOwnProperty(key)) {
-                continue;
+        function parseUnionTypeOrHigher() {
+            return parseUnionOrIntersectionType(166 /* UnionType */, parseIntersectionTypeOrHigher, 49 /* BarToken */);
+        }
+        function isStartOfFunctionType() {
+            if (token() === 27 /* LessThanToken */) {
+                return true;
             }
-            clone[key] = node[key];
+            return token() === 19 /* OpenParenToken */ && lookAhead(isUnambiguouslyStartOfFunctionType);
         }
-        return clone;
-    }
-    ts.getSynthesizedClone = getSynthesizedClone;
-    /**
-     * Creates a shallow, memberwise clone of a node for mutation.
-     */
-    function getMutableClone(node) {
-        var clone = getSynthesizedClone(node);
-        clone.pos = node.pos;
-        clone.end = node.end;
-        clone.parent = node.parent;
-        return clone;
-    }
-    ts.getMutableClone = getMutableClone;
-    function createLiteral(value, location) {
-        if (typeof value === "number") {
-            var node = createNode(8 /* NumericLiteral */, location, /*flags*/ undefined);
-            node.text = value.toString();
-            return node;
+        function skipParameterStart() {
+            if (ts.isModifierKind(token())) {
+                // Skip modifiers
+                parseModifiers();
+            }
+            if (isIdentifier() || token() === 99 /* ThisKeyword */) {
+                nextToken();
+                return true;
+            }
+            if (token() === 21 /* OpenBracketToken */ || token() === 17 /* OpenBraceToken */) {
+                // Return true if we can parse an array or object binding pattern with no errors
+                var previousErrorCount = parseDiagnostics.length;
+                parseIdentifierOrPattern();
+                return previousErrorCount === parseDiagnostics.length;
+            }
+            return false;
         }
-        else if (typeof value === "boolean") {
-            return createNode(value ? 99 /* TrueKeyword */ : 84 /* FalseKeyword */, location, /*flags*/ undefined);
+        function isUnambiguouslyStartOfFunctionType() {
+            nextToken();
+            if (token() === 20 /* CloseParenToken */ || token() === 24 /* DotDotDotToken */) {
+                // ( )
+                // ( ...
+                return true;
+            }
+            if (skipParameterStart()) {
+                // We successfully skipped modifiers (if any) and an identifier or binding pattern,
+                // now see if we have something that indicates a parameter declaration
+                if (token() === 56 /* ColonToken */ || token() === 26 /* CommaToken */ ||
+                    token() === 55 /* QuestionToken */ || token() === 58 /* EqualsToken */) {
+                    // ( xxx :
+                    // ( xxx ,
+                    // ( xxx ?
+                    // ( xxx =
+                    return true;
+                }
+                if (token() === 20 /* CloseParenToken */) {
+                    nextToken();
+                    if (token() === 36 /* EqualsGreaterThanToken */) {
+                        // ( xxx ) =>
+                        return true;
+                    }
+                }
+            }
+            return false;
         }
-        else if (typeof value === "string") {
-            var node = createNode(9 /* StringLiteral */, location, /*flags*/ undefined);
-            node.text = value;
-            return node;
+        function parseTypeOrTypePredicate() {
+            var typePredicateVariable = isIdentifier() && tryParse(parseTypePredicatePrefix);
+            var type = parseType();
+            if (typePredicateVariable) {
+                var node = createNode(158 /* TypePredicate */, typePredicateVariable.pos);
+                node.parameterName = typePredicateVariable;
+                node.type = type;
+                return finishNode(node);
+            }
+            else {
+                return type;
+            }
         }
-        else {
-            var node = createNode(9 /* StringLiteral */, location, /*flags*/ undefined);
-            node.textSourceNode = value;
-            node.text = value.text;
-            return node;
+        function parseTypePredicatePrefix() {
+            var id = parseIdentifier();
+            if (token() === 126 /* IsKeyword */ && !scanner.hasPrecedingLineBreak()) {
+                nextToken();
+                return id;
+            }
         }
-    }
-    ts.createLiteral = createLiteral;
-    // Identifiers
-    var nextAutoGenerateId = 0;
-    function createIdentifier(text, location) {
-        var node = createNode(69 /* Identifier */, location);
-        node.text = ts.escapeIdentifier(text);
-        node.originalKeywordKind = ts.stringToToken(text);
-        node.autoGenerateKind = 0 /* None */;
-        node.autoGenerateId = 0;
-        return node;
-    }
-    ts.createIdentifier = createIdentifier;
-    function createTempVariable(recordTempVariable, location) {
-        var name = createNode(69 /* Identifier */, location);
-        name.text = "";
-        name.originalKeywordKind = 0 /* Unknown */;
-        name.autoGenerateKind = 1 /* Auto */;
-        name.autoGenerateId = nextAutoGenerateId;
-        nextAutoGenerateId++;
-        if (recordTempVariable) {
-            recordTempVariable(name);
+        function parseType() {
+            // The rules about 'yield' only apply to actual code/expression contexts.  They don't
+            // apply to 'type' contexts.  So we disable these parameters here before moving on.
+            return doOutsideOfContext(20480 /* TypeExcludesFlags */, parseTypeWorker);
         }
-        return name;
-    }
-    ts.createTempVariable = createTempVariable;
-    function createLoopVariable(location) {
-        var name = createNode(69 /* Identifier */, location);
-        name.text = "";
-        name.originalKeywordKind = 0 /* Unknown */;
-        name.autoGenerateKind = 2 /* Loop */;
-        name.autoGenerateId = nextAutoGenerateId;
-        nextAutoGenerateId++;
-        return name;
-    }
-    ts.createLoopVariable = createLoopVariable;
-    function createUniqueName(text, location) {
-        var name = createNode(69 /* Identifier */, location);
-        name.text = text;
-        name.originalKeywordKind = 0 /* Unknown */;
-        name.autoGenerateKind = 3 /* Unique */;
-        name.autoGenerateId = nextAutoGenerateId;
-        nextAutoGenerateId++;
-        return name;
-    }
-    ts.createUniqueName = createUniqueName;
-    function getGeneratedNameForNode(node, location) {
-        var name = createNode(69 /* Identifier */, location);
-        name.original = node;
-        name.text = "";
-        name.originalKeywordKind = 0 /* Unknown */;
-        name.autoGenerateKind = 4 /* Node */;
-        name.autoGenerateId = nextAutoGenerateId;
-        nextAutoGenerateId++;
-        return name;
-    }
-    ts.getGeneratedNameForNode = getGeneratedNameForNode;
-    // Punctuation
-    function createToken(token) {
-        return createNode(token);
-    }
-    ts.createToken = createToken;
-    // Reserved words
-    function createSuper() {
-        var node = createNode(95 /* SuperKeyword */);
-        return node;
-    }
-    ts.createSuper = createSuper;
-    function createThis(location) {
-        var node = createNode(97 /* ThisKeyword */, location);
-        return node;
-    }
-    ts.createThis = createThis;
-    function createNull() {
-        var node = createNode(93 /* NullKeyword */);
-        return node;
-    }
-    ts.createNull = createNull;
-    // Names
-    function createComputedPropertyName(expression, location) {
-        var node = createNode(140 /* ComputedPropertyName */, location);
-        node.expression = expression;
-        return node;
-    }
-    ts.createComputedPropertyName = createComputedPropertyName;
-    function updateComputedPropertyName(node, expression) {
-        if (node.expression !== expression) {
-            return updateNode(createComputedPropertyName(expression, node), node);
+        function parseTypeWorker() {
+            if (isStartOfFunctionType()) {
+                return parseFunctionOrConstructorType(160 /* FunctionType */);
+            }
+            if (token() === 94 /* NewKeyword */) {
+                return parseFunctionOrConstructorType(161 /* ConstructorType */);
+            }
+            return parseUnionTypeOrHigher();
         }
-        return node;
-    }
-    ts.updateComputedPropertyName = updateComputedPropertyName;
-    // Signature elements
-    function createParameter(name, initializer, location) {
-        return createParameterDeclaration(
-        /*decorators*/ undefined, 
-        /*modifiers*/ undefined, 
-        /*dotDotDotToken*/ undefined, name, 
-        /*questionToken*/ undefined, 
-        /*type*/ undefined, initializer, location);
-    }
-    ts.createParameter = createParameter;
-    function createParameterDeclaration(decorators, modifiers, dotDotDotToken, name, questionToken, type, initializer, location, flags) {
-        var node = createNode(142 /* Parameter */, location, flags);
-        node.decorators = decorators ? createNodeArray(decorators) : undefined;
-        node.modifiers = modifiers ? createNodeArray(modifiers) : undefined;
-        node.dotDotDotToken = dotDotDotToken;
-        node.name = typeof name === "string" ? createIdentifier(name) : name;
-        node.questionToken = questionToken;
-        node.type = type;
-        node.initializer = initializer ? parenthesizeExpressionForList(initializer) : undefined;
-        return node;
-    }
-    ts.createParameterDeclaration = createParameterDeclaration;
-    function updateParameterDeclaration(node, decorators, modifiers, name, type, initializer) {
-        if (node.decorators !== decorators || node.modifiers !== modifiers || node.name !== name || node.type !== type || node.initializer !== initializer) {
-            return updateNode(createParameterDeclaration(decorators, modifiers, node.dotDotDotToken, name, node.questionToken, type, initializer, /*location*/ node, /*flags*/ node.flags), node);
+        function parseTypeAnnotation() {
+            return parseOptional(56 /* ColonToken */) ? parseType() : undefined;
         }
-        return node;
-    }
-    ts.updateParameterDeclaration = updateParameterDeclaration;
-    // Type members
-    function createProperty(decorators, modifiers, name, questionToken, type, initializer, location) {
-        var node = createNode(145 /* PropertyDeclaration */, location);
-        node.decorators = decorators ? createNodeArray(decorators) : undefined;
-        node.modifiers = modifiers ? createNodeArray(modifiers) : undefined;
-        node.name = typeof name === "string" ? createIdentifier(name) : name;
-        node.questionToken = questionToken;
-        node.type = type;
-        node.initializer = initializer;
-        return node;
-    }
-    ts.createProperty = createProperty;
-    function updateProperty(node, decorators, modifiers, name, type, initializer) {
-        if (node.decorators !== decorators || node.modifiers !== modifiers || node.name !== name || node.type !== type || node.initializer !== initializer) {
-            return updateNode(createProperty(decorators, modifiers, name, node.questionToken, type, initializer, node), node);
+        // EXPRESSIONS
+        function isStartOfLeftHandSideExpression() {
+            switch (token()) {
+                case 99 /* ThisKeyword */:
+                case 97 /* SuperKeyword */:
+                case 95 /* NullKeyword */:
+                case 101 /* TrueKeyword */:
+                case 86 /* FalseKeyword */:
+                case 8 /* NumericLiteral */:
+                case 9 /* StringLiteral */:
+                case 13 /* NoSubstitutionTemplateLiteral */:
+                case 14 /* TemplateHead */:
+                case 19 /* OpenParenToken */:
+                case 21 /* OpenBracketToken */:
+                case 17 /* OpenBraceToken */:
+                case 89 /* FunctionKeyword */:
+                case 75 /* ClassKeyword */:
+                case 94 /* NewKeyword */:
+                case 41 /* SlashToken */:
+                case 63 /* SlashEqualsToken */:
+                case 71 /* Identifier */:
+                    return true;
+                case 91 /* ImportKeyword */:
+                    return lookAhead(nextTokenIsOpenParenOrLessThan);
+                default:
+                    return isIdentifier();
+            }
         }
-        return node;
-    }
-    ts.updateProperty = updateProperty;
-    function createMethod(decorators, modifiers, asteriskToken, name, typeParameters, parameters, type, body, location, flags) {
-        var node = createNode(147 /* MethodDeclaration */, location, flags);
-        node.decorators = decorators ? createNodeArray(decorators) : undefined;
-        node.modifiers = modifiers ? createNodeArray(modifiers) : undefined;
-        node.asteriskToken = asteriskToken;
-        node.name = typeof name === "string" ? createIdentifier(name) : name;
-        node.typeParameters = typeParameters ? createNodeArray(typeParameters) : undefined;
-        node.parameters = createNodeArray(parameters);
-        node.type = type;
-        node.body = body;
-        return node;
-    }
-    ts.createMethod = createMethod;
-    function updateMethod(node, decorators, modifiers, name, typeParameters, parameters, type, body) {
-        if (node.decorators !== decorators || node.modifiers !== modifiers || node.name !== name || node.typeParameters !== typeParameters || node.parameters !== parameters || node.type !== type || node.body !== body) {
-            return updateNode(createMethod(decorators, modifiers, node.asteriskToken, name, typeParameters, parameters, type, body, /*location*/ node, node.flags), node);
+        function isStartOfExpression() {
+            if (isStartOfLeftHandSideExpression()) {
+                return true;
+            }
+            switch (token()) {
+                case 37 /* PlusToken */:
+                case 38 /* MinusToken */:
+                case 52 /* TildeToken */:
+                case 51 /* ExclamationToken */:
+                case 80 /* DeleteKeyword */:
+                case 103 /* TypeOfKeyword */:
+                case 105 /* VoidKeyword */:
+                case 43 /* PlusPlusToken */:
+                case 44 /* MinusMinusToken */:
+                case 27 /* LessThanToken */:
+                case 121 /* AwaitKeyword */:
+                case 116 /* YieldKeyword */:
+                    // Yield/await always starts an expression.  Either it is an identifier (in which case
+                    // it is definitely an expression).  Or it's a keyword (either because we're in
+                    // a generator or async function, or in strict mode (or both)) and it started a yield or await expression.
+                    return true;
+                default:
+                    // Error tolerance.  If we see the start of some binary operator, we consider
+                    // that the start of an expression.  That way we'll parse out a missing identifier,
+                    // give a good message about an identifier being missing, and then consume the
+                    // rest of the binary expression.
+                    if (isBinaryOperator()) {
+                        return true;
+                    }
+                    return isIdentifier();
+            }
         }
-        return node;
-    }
-    ts.updateMethod = updateMethod;
-    function createConstructor(decorators, modifiers, parameters, body, location, flags) {
-        var node = createNode(148 /* Constructor */, location, flags);
-        node.decorators = decorators ? createNodeArray(decorators) : undefined;
-        node.modifiers = modifiers ? createNodeArray(modifiers) : undefined;
-        node.typeParameters = undefined;
-        node.parameters = createNodeArray(parameters);
-        node.type = undefined;
-        node.body = body;
-        return node;
-    }
-    ts.createConstructor = createConstructor;
-    function updateConstructor(node, decorators, modifiers, parameters, body) {
-        if (node.decorators !== decorators || node.modifiers !== modifiers || node.parameters !== parameters || node.body !== body) {
-            return updateNode(createConstructor(decorators, modifiers, parameters, body, /*location*/ node, node.flags), node);
+        function isStartOfExpressionStatement() {
+            // As per the grammar, none of '{' or 'function' or 'class' can start an expression statement.
+            return token() !== 17 /* OpenBraceToken */ &&
+                token() !== 89 /* FunctionKeyword */ &&
+                token() !== 75 /* ClassKeyword */ &&
+                token() !== 57 /* AtToken */ &&
+                isStartOfExpression();
         }
-        return node;
-    }
-    ts.updateConstructor = updateConstructor;
-    function createGetAccessor(decorators, modifiers, name, parameters, type, body, location, flags) {
-        var node = createNode(149 /* GetAccessor */, location, flags);
-        node.decorators = decorators ? createNodeArray(decorators) : undefined;
-        node.modifiers = modifiers ? createNodeArray(modifiers) : undefined;
-        node.name = typeof name === "string" ? createIdentifier(name) : name;
-        node.typeParameters = undefined;
-        node.parameters = createNodeArray(parameters);
-        node.type = type;
-        node.body = body;
-        return node;
-    }
-    ts.createGetAccessor = createGetAccessor;
-    function updateGetAccessor(node, decorators, modifiers, name, parameters, type, body) {
-        if (node.decorators !== decorators || node.modifiers !== modifiers || node.name !== name || node.parameters !== parameters || node.type !== type || node.body !== body) {
-            return updateNode(createGetAccessor(decorators, modifiers, name, parameters, type, body, /*location*/ node, node.flags), node);
+        function parseExpression() {
+            // Expression[in]:
+            //      AssignmentExpression[in]
+            //      Expression[in] , AssignmentExpression[in]
+            // clear the decorator context when parsing Expression, as it should be unambiguous when parsing a decorator
+            var saveDecoratorContext = inDecoratorContext();
+            if (saveDecoratorContext) {
+                setDecoratorContext(/*val*/ false);
+            }
+            var expr = parseAssignmentExpressionOrHigher();
+            var operatorToken;
+            while ((operatorToken = parseOptionalToken(26 /* CommaToken */))) {
+                expr = makeBinaryExpression(expr, operatorToken, parseAssignmentExpressionOrHigher());
+            }
+            if (saveDecoratorContext) {
+                setDecoratorContext(/*val*/ true);
+            }
+            return expr;
         }
-        return node;
-    }
-    ts.updateGetAccessor = updateGetAccessor;
-    function createSetAccessor(decorators, modifiers, name, parameters, body, location, flags) {
-        var node = createNode(150 /* SetAccessor */, location, flags);
-        node.decorators = decorators ? createNodeArray(decorators) : undefined;
-        node.modifiers = modifiers ? createNodeArray(modifiers) : undefined;
-        node.name = typeof name === "string" ? createIdentifier(name) : name;
-        node.typeParameters = undefined;
-        node.parameters = createNodeArray(parameters);
-        node.body = body;
-        return node;
-    }
-    ts.createSetAccessor = createSetAccessor;
-    function updateSetAccessor(node, decorators, modifiers, name, parameters, body) {
-        if (node.decorators !== decorators || node.modifiers !== modifiers || node.name !== name || node.parameters !== parameters || node.body !== body) {
-            return updateNode(createSetAccessor(decorators, modifiers, name, parameters, body, /*location*/ node, node.flags), node);
+        function parseInitializer(inParameter) {
+            if (token() !== 58 /* EqualsToken */) {
+                // It's not uncommon during typing for the user to miss writing the '=' token.  Check if
+                // there is no newline after the last token and if we're on an expression.  If so, parse
+                // this as an equals-value clause with a missing equals.
+                // NOTE: There are two places where we allow equals-value clauses.  The first is in a
+                // variable declarator.  The second is with a parameter.  For variable declarators
+                // it's more likely that a { would be a allowed (as an object literal).  While this
+                // is also allowed for parameters, the risk is that we consume the { as an object
+                // literal when it really will be for the block following the parameter.
+                if (scanner.hasPrecedingLineBreak() || (inParameter && token() === 17 /* OpenBraceToken */) || !isStartOfExpression()) {
+                    // preceding line break, open brace in a parameter (likely a function body) or current token is not an expression -
+                    // do not try to parse initializer
+                    return undefined;
+                }
+            }
+            // Initializer[In, Yield] :
+            //     = AssignmentExpression[?In, ?Yield]
+            parseExpected(58 /* EqualsToken */);
+            return parseAssignmentExpressionOrHigher();
+        }
+        function parseAssignmentExpressionOrHigher() {
+            //  AssignmentExpression[in,yield]:
+            //      1) ConditionalExpression[?in,?yield]
+            //      2) LeftHandSideExpression = AssignmentExpression[?in,?yield]
+            //      3) LeftHandSideExpression AssignmentOperator AssignmentExpression[?in,?yield]
+            //      4) ArrowFunctionExpression[?in,?yield]
+            //      5) AsyncArrowFunctionExpression[in,yield,await]
+            //      6) [+Yield] YieldExpression[?In]
+            //
+            // Note: for ease of implementation we treat productions '2' and '3' as the same thing.
+            // (i.e. they're both BinaryExpressions with an assignment operator in it).
+            // First, do the simple check if we have a YieldExpression (production '6').
+            if (isYieldExpression()) {
+                return parseYieldExpression();
+            }
+            // Then, check if we have an arrow function (production '4' and '5') that starts with a parenthesized
+            // parameter list or is an async arrow function.
+            // AsyncArrowFunctionExpression:
+            //      1) async[no LineTerminator here]AsyncArrowBindingIdentifier[?Yield][no LineTerminator here]=>AsyncConciseBody[?In]
+            //      2) CoverCallExpressionAndAsyncArrowHead[?Yield, ?Await][no LineTerminator here]=>AsyncConciseBody[?In]
+            // Production (1) of AsyncArrowFunctionExpression is parsed in "tryParseAsyncSimpleArrowFunctionExpression".
+            // And production (2) is parsed in "tryParseParenthesizedArrowFunctionExpression".
+            //
+            // If we do successfully parse arrow-function, we must *not* recurse for productions 1, 2 or 3. An ArrowFunction is
+            // not a  LeftHandSideExpression, nor does it start a ConditionalExpression.  So we are done
+            // with AssignmentExpression if we see one.
+            var arrowExpression = tryParseParenthesizedArrowFunctionExpression() || tryParseAsyncSimpleArrowFunctionExpression();
+            if (arrowExpression) {
+                return arrowExpression;
+            }
+            // Now try to see if we're in production '1', '2' or '3'.  A conditional expression can
+            // start with a LogicalOrExpression, while the assignment productions can only start with
+            // LeftHandSideExpressions.
+            //
+            // So, first, we try to just parse out a BinaryExpression.  If we get something that is a
+            // LeftHandSide or higher, then we can try to parse out the assignment expression part.
+            // Otherwise, we try to parse out the conditional expression bit.  We want to allow any
+            // binary expression here, so we pass in the 'lowest' precedence here so that it matches
+            // and consumes anything.
+            var expr = parseBinaryExpressionOrHigher(/*precedence*/ 0);
+            // To avoid a look-ahead, we did not handle the case of an arrow function with a single un-parenthesized
+            // parameter ('x => ...') above. We handle it here by checking if the parsed expression was a single
+            // identifier and the current token is an arrow.
+            if (expr.kind === 71 /* Identifier */ && token() === 36 /* EqualsGreaterThanToken */) {
+                return parseSimpleArrowFunctionExpression(expr);
+            }
+            // Now see if we might be in cases '2' or '3'.
+            // If the expression was a LHS expression, and we have an assignment operator, then
+            // we're in '2' or '3'. Consume the assignment and return.
+            //
+            // Note: we call reScanGreaterToken so that we get an appropriately merged token
+            // for cases like > > =  becoming >>=
+            if (ts.isLeftHandSideExpression(expr) && ts.isAssignmentOperator(reScanGreaterToken())) {
+                return makeBinaryExpression(expr, parseTokenNode(), parseAssignmentExpressionOrHigher());
+            }
+            // It wasn't an assignment or a lambda.  This is a conditional expression:
+            return parseConditionalExpressionRest(expr);
+        }
+        function isYieldExpression() {
+            if (token() === 116 /* YieldKeyword */) {
+                // If we have a 'yield' keyword, and this is a context where yield expressions are
+                // allowed, then definitely parse out a yield expression.
+                if (inYieldContext()) {
+                    return true;
+                }
+                // We're in a context where 'yield expr' is not allowed.  However, if we can
+                // definitely tell that the user was trying to parse a 'yield expr' and not
+                // just a normal expr that start with a 'yield' identifier, then parse out
+                // a 'yield expr'.  We can then report an error later that they are only
+                // allowed in generator expressions.
+                //
+                // for example, if we see 'yield(foo)', then we'll have to treat that as an
+                // invocation expression of something called 'yield'.  However, if we have
+                // 'yield foo' then that is not legal as a normal expression, so we can
+                // definitely recognize this as a yield expression.
+                //
+                // for now we just check if the next token is an identifier.  More heuristics
+                // can be added here later as necessary.  We just need to make sure that we
+                // don't accidentally consume something legal.
+                return lookAhead(nextTokenIsIdentifierOrKeywordOrLiteralOnSameLine);
+            }
+            return false;
         }
-        return node;
-    }
-    ts.updateSetAccessor = updateSetAccessor;
-    // Binding Patterns
-    function createObjectBindingPattern(elements, location) {
-        var node = createNode(167 /* ObjectBindingPattern */, location);
-        node.elements = createNodeArray(elements);
-        return node;
-    }
-    ts.createObjectBindingPattern = createObjectBindingPattern;
-    function updateObjectBindingPattern(node, elements) {
-        if (node.elements !== elements) {
-            return updateNode(createObjectBindingPattern(elements, node), node);
+        function nextTokenIsIdentifierOnSameLine() {
+            nextToken();
+            return !scanner.hasPrecedingLineBreak() && isIdentifier();
         }
-        return node;
-    }
-    ts.updateObjectBindingPattern = updateObjectBindingPattern;
-    function createArrayBindingPattern(elements, location) {
-        var node = createNode(168 /* ArrayBindingPattern */, location);
-        node.elements = createNodeArray(elements);
-        return node;
-    }
-    ts.createArrayBindingPattern = createArrayBindingPattern;
-    function updateArrayBindingPattern(node, elements) {
-        if (node.elements !== elements) {
-            return updateNode(createArrayBindingPattern(elements, node), node);
+        function parseYieldExpression() {
+            var node = createNode(197 /* YieldExpression */);
+            // YieldExpression[In] :
+            //      yield
+            //      yield [no LineTerminator here] [Lexical goal InputElementRegExp]AssignmentExpression[?In, Yield]
+            //      yield [no LineTerminator here] * [Lexical goal InputElementRegExp]AssignmentExpression[?In, Yield]
+            nextToken();
+            if (!scanner.hasPrecedingLineBreak() &&
+                (token() === 39 /* AsteriskToken */ || isStartOfExpression())) {
+                node.asteriskToken = parseOptionalToken(39 /* AsteriskToken */);
+                node.expression = parseAssignmentExpressionOrHigher();
+                return finishNode(node);
+            }
+            else {
+                // if the next token is not on the same line as yield.  or we don't have an '*' or
+                // the start of an expression, then this is just a simple "yield" expression.
+                return finishNode(node);
+            }
         }
-        return node;
-    }
-    ts.updateArrayBindingPattern = updateArrayBindingPattern;
-    function createBindingElement(propertyName, dotDotDotToken, name, initializer, location) {
-        var node = createNode(169 /* BindingElement */, location);
-        node.propertyName = typeof propertyName === "string" ? createIdentifier(propertyName) : propertyName;
-        node.dotDotDotToken = dotDotDotToken;
-        node.name = typeof name === "string" ? createIdentifier(name) : name;
-        node.initializer = initializer;
-        return node;
-    }
-    ts.createBindingElement = createBindingElement;
-    function updateBindingElement(node, propertyName, name, initializer) {
-        if (node.propertyName !== propertyName || node.name !== name || node.initializer !== initializer) {
-            return updateNode(createBindingElement(propertyName, node.dotDotDotToken, name, initializer, node), node);
+        function parseSimpleArrowFunctionExpression(identifier, asyncModifier) {
+            ts.Debug.assert(token() === 36 /* EqualsGreaterThanToken */, "parseSimpleArrowFunctionExpression should only have been called if we had a =>");
+            var node;
+            if (asyncModifier) {
+                node = createNode(187 /* ArrowFunction */, asyncModifier.pos);
+                node.modifiers = asyncModifier;
+            }
+            else {
+                node = createNode(187 /* ArrowFunction */, identifier.pos);
+            }
+            var parameter = createNode(146 /* Parameter */, identifier.pos);
+            parameter.name = identifier;
+            finishNode(parameter);
+            node.parameters = createNodeArray([parameter], parameter.pos);
+            node.parameters.end = parameter.end;
+            node.equalsGreaterThanToken = parseExpectedToken(36 /* EqualsGreaterThanToken */, /*reportAtCurrentPosition*/ false, ts.Diagnostics._0_expected, "=>");
+            node.body = parseArrowFunctionExpressionBody(/*isAsync*/ !!asyncModifier);
+            return addJSDocComment(finishNode(node));
         }
-        return node;
-    }
-    ts.updateBindingElement = updateBindingElement;
-    // Expression
-    function createArrayLiteral(elements, location, multiLine) {
-        var node = createNode(170 /* ArrayLiteralExpression */, location);
-        node.elements = parenthesizeListElements(createNodeArray(elements));
-        if (multiLine) {
-            node.multiLine = true;
+        function tryParseParenthesizedArrowFunctionExpression() {
+            var triState = isParenthesizedArrowFunctionExpression();
+            if (triState === 0 /* False */) {
+                // It's definitely not a parenthesized arrow function expression.
+                return undefined;
+            }
+            // If we definitely have an arrow function, then we can just parse one, not requiring a
+            // following => or { token. Otherwise, we *might* have an arrow function.  Try to parse
+            // it out, but don't allow any ambiguity, and return 'undefined' if this could be an
+            // expression instead.
+            var arrowFunction = triState === 1 /* True */
+                ? parseParenthesizedArrowFunctionExpressionHead(/*allowAmbiguity*/ true)
+                : tryParse(parsePossibleParenthesizedArrowFunctionExpressionHead);
+            if (!arrowFunction) {
+                // Didn't appear to actually be a parenthesized arrow function.  Just bail out.
+                return undefined;
+            }
+            var isAsync = !!(ts.getModifierFlags(arrowFunction) & 256 /* Async */);
+            // If we have an arrow, then try to parse the body. Even if not, try to parse if we
+            // have an opening brace, just in case we're in an error state.
+            var lastToken = token();
+            arrowFunction.equalsGreaterThanToken = parseExpectedToken(36 /* EqualsGreaterThanToken */, /*reportAtCurrentPosition*/ false, ts.Diagnostics._0_expected, "=>");
+            arrowFunction.body = (lastToken === 36 /* EqualsGreaterThanToken */ || lastToken === 17 /* OpenBraceToken */)
+                ? parseArrowFunctionExpressionBody(isAsync)
+                : parseIdentifier();
+            return addJSDocComment(finishNode(arrowFunction));
         }
-        return node;
-    }
-    ts.createArrayLiteral = createArrayLiteral;
-    function updateArrayLiteral(node, elements) {
-        if (node.elements !== elements) {
-            return updateNode(createArrayLiteral(elements, node, node.multiLine), node);
+        //  True        -> We definitely expect a parenthesized arrow function here.
+        //  False       -> There *cannot* be a parenthesized arrow function here.
+        //  Unknown     -> There *might* be a parenthesized arrow function here.
+        //                 Speculatively look ahead to be sure, and rollback if not.
+        function isParenthesizedArrowFunctionExpression() {
+            if (token() === 19 /* OpenParenToken */ || token() === 27 /* LessThanToken */ || token() === 120 /* AsyncKeyword */) {
+                return lookAhead(isParenthesizedArrowFunctionExpressionWorker);
+            }
+            if (token() === 36 /* EqualsGreaterThanToken */) {
+                // ERROR RECOVERY TWEAK:
+                // If we see a standalone => try to parse it as an arrow function expression as that's
+                // likely what the user intended to write.
+                return 1 /* True */;
+            }
+            // Definitely not a parenthesized arrow function.
+            return 0 /* False */;
         }
-        return node;
-    }
-    ts.updateArrayLiteral = updateArrayLiteral;
-    function createObjectLiteral(properties, location, multiLine) {
-        var node = createNode(171 /* ObjectLiteralExpression */, location);
-        node.properties = createNodeArray(properties);
-        if (multiLine) {
-            node.multiLine = true;
+        function isParenthesizedArrowFunctionExpressionWorker() {
+            if (token() === 120 /* AsyncKeyword */) {
+                nextToken();
+                if (scanner.hasPrecedingLineBreak()) {
+                    return 0 /* False */;
+                }
+                if (token() !== 19 /* OpenParenToken */ && token() !== 27 /* LessThanToken */) {
+                    return 0 /* False */;
+                }
+            }
+            var first = token();
+            var second = nextToken();
+            if (first === 19 /* OpenParenToken */) {
+                if (second === 20 /* CloseParenToken */) {
+                    // Simple cases: "() =>", "(): ", and  "() {".
+                    // This is an arrow function with no parameters.
+                    // The last one is not actually an arrow function,
+                    // but this is probably what the user intended.
+                    var third = nextToken();
+                    switch (third) {
+                        case 36 /* EqualsGreaterThanToken */:
+                        case 56 /* ColonToken */:
+                        case 17 /* OpenBraceToken */:
+                            return 1 /* True */;
+                        default:
+                            return 0 /* False */;
+                    }
+                }
+                // If encounter "([" or "({", this could be the start of a binding pattern.
+                // Examples:
+                //      ([ x ]) => { }
+                //      ({ x }) => { }
+                //      ([ x ])
+                //      ({ x })
+                if (second === 21 /* OpenBracketToken */ || second === 17 /* OpenBraceToken */) {
+                    return 2 /* Unknown */;
+                }
+                // Simple case: "(..."
+                // This is an arrow function with a rest parameter.
+                if (second === 24 /* DotDotDotToken */) {
+                    return 1 /* True */;
+                }
+                // If we had "(" followed by something that's not an identifier,
+                // then this definitely doesn't look like a lambda.
+                // Note: we could be a little more lenient and allow
+                // "(public" or "(private". These would not ever actually be allowed,
+                // but we could provide a good error message instead of bailing out.
+                if (!isIdentifier()) {
+                    return 0 /* False */;
+                }
+                // If we have something like "(a:", then we must have a
+                // type-annotated parameter in an arrow function expression.
+                if (nextToken() === 56 /* ColonToken */) {
+                    return 1 /* True */;
+                }
+                // This *could* be a parenthesized arrow function.
+                // Return Unknown to let the caller know.
+                return 2 /* Unknown */;
+            }
+            else {
+                ts.Debug.assert(first === 27 /* LessThanToken */);
+                // If we have "<" not followed by an identifier,
+                // then this definitely is not an arrow function.
+                if (!isIdentifier()) {
+                    return 0 /* False */;
+                }
+                // JSX overrides
+                if (sourceFile.languageVariant === 1 /* JSX */) {
+                    var isArrowFunctionInJsx = lookAhead(function () {
+                        var third = nextToken();
+                        if (third === 85 /* ExtendsKeyword */) {
+                            var fourth = nextToken();
+                            switch (fourth) {
+                                case 58 /* EqualsToken */:
+                                case 29 /* GreaterThanToken */:
+                                    return false;
+                                default:
+                                    return true;
+                            }
+                        }
+                        else if (third === 26 /* CommaToken */) {
+                            return true;
+                        }
+                        return false;
+                    });
+                    if (isArrowFunctionInJsx) {
+                        return 1 /* True */;
+                    }
+                    return 0 /* False */;
+                }
+                // This *could* be a parenthesized arrow function.
+                return 2 /* Unknown */;
+            }
         }
-        return node;
-    }
-    ts.createObjectLiteral = createObjectLiteral;
-    function updateObjectLiteral(node, properties) {
-        if (node.properties !== properties) {
-            return updateNode(createObjectLiteral(properties, node, node.multiLine), node);
+        function parsePossibleParenthesizedArrowFunctionExpressionHead() {
+            return parseParenthesizedArrowFunctionExpressionHead(/*allowAmbiguity*/ false);
         }
-        return node;
-    }
-    ts.updateObjectLiteral = updateObjectLiteral;
-    function createPropertyAccess(expression, name, location, flags) {
-        var node = createNode(172 /* PropertyAccessExpression */, location, flags);
-        node.expression = parenthesizeForAccess(expression);
-        (node.emitNode || (node.emitNode = {})).flags |= 1048576 /* NoIndentation */;
-        node.name = typeof name === "string" ? createIdentifier(name) : name;
-        return node;
-    }
-    ts.createPropertyAccess = createPropertyAccess;
-    function updatePropertyAccess(node, expression, name) {
-        if (node.expression !== expression || node.name !== name) {
-            var propertyAccess = createPropertyAccess(expression, name, /*location*/ node, node.flags);
-            // Because we are updating existed propertyAccess we want to inherit its emitFlags instead of using default from createPropertyAccess
-            (propertyAccess.emitNode || (propertyAccess.emitNode = {})).flags = getEmitFlags(node);
-            return updateNode(propertyAccess, node);
+        function tryParseAsyncSimpleArrowFunctionExpression() {
+            // We do a check here so that we won't be doing unnecessarily call to "lookAhead"
+            if (token() === 120 /* AsyncKeyword */) {
+                var isUnParenthesizedAsyncArrowFunction = lookAhead(isUnParenthesizedAsyncArrowFunctionWorker);
+                if (isUnParenthesizedAsyncArrowFunction === 1 /* True */) {
+                    var asyncModifier = parseModifiersForArrowFunction();
+                    var expr = parseBinaryExpressionOrHigher(/*precedence*/ 0);
+                    return parseSimpleArrowFunctionExpression(expr, asyncModifier);
+                }
+            }
+            return undefined;
         }
-        return node;
-    }
-    ts.updatePropertyAccess = updatePropertyAccess;
-    function createElementAccess(expression, index, location) {
-        var node = createNode(173 /* ElementAccessExpression */, location);
-        node.expression = parenthesizeForAccess(expression);
-        node.argumentExpression = typeof index === "number" ? createLiteral(index) : index;
-        return node;
-    }
-    ts.createElementAccess = createElementAccess;
-    function updateElementAccess(node, expression, argumentExpression) {
-        if (node.expression !== expression || node.argumentExpression !== argumentExpression) {
-            return updateNode(createElementAccess(expression, argumentExpression, node), node);
+        function isUnParenthesizedAsyncArrowFunctionWorker() {
+            // AsyncArrowFunctionExpression:
+            //      1) async[no LineTerminator here]AsyncArrowBindingIdentifier[?Yield][no LineTerminator here]=>AsyncConciseBody[?In]
+            //      2) CoverCallExpressionAndAsyncArrowHead[?Yield, ?Await][no LineTerminator here]=>AsyncConciseBody[?In]
+            if (token() === 120 /* AsyncKeyword */) {
+                nextToken();
+                // If the "async" is followed by "=>" token then it is not a begining of an async arrow-function
+                // but instead a simple arrow-function which will be parsed inside "parseAssignmentExpressionOrHigher"
+                if (scanner.hasPrecedingLineBreak() || token() === 36 /* EqualsGreaterThanToken */) {
+                    return 0 /* False */;
+                }
+                // Check for un-parenthesized AsyncArrowFunction
+                var expr = parseBinaryExpressionOrHigher(/*precedence*/ 0);
+                if (!scanner.hasPrecedingLineBreak() && expr.kind === 71 /* Identifier */ && token() === 36 /* EqualsGreaterThanToken */) {
+                    return 1 /* True */;
+                }
+            }
+            return 0 /* False */;
         }
-        return node;
-    }
-    ts.updateElementAccess = updateElementAccess;
-    function createCall(expression, typeArguments, argumentsArray, location, flags) {
-        var node = createNode(174 /* CallExpression */, location, flags);
-        node.expression = parenthesizeForAccess(expression);
-        if (typeArguments) {
-            node.typeArguments = createNodeArray(typeArguments);
+        function parseParenthesizedArrowFunctionExpressionHead(allowAmbiguity) {
+            var node = createNode(187 /* ArrowFunction */);
+            node.modifiers = parseModifiersForArrowFunction();
+            var isAsync = !!(ts.getModifierFlags(node) & 256 /* Async */);
+            // Arrow functions are never generators.
+            //
+            // If we're speculatively parsing a signature for a parenthesized arrow function, then
+            // we have to have a complete parameter list.  Otherwise we might see something like
+            // a => (b => c)
+            // And think that "(b =>" was actually a parenthesized arrow function with a missing
+            // close paren.
+            fillSignature(56 /* ColonToken */, /*yieldContext*/ false, /*awaitContext*/ isAsync, /*requireCompleteParameterList*/ !allowAmbiguity, node);
+            // If we couldn't get parameters, we definitely could not parse out an arrow function.
+            if (!node.parameters) {
+                return undefined;
+            }
+            // Parsing a signature isn't enough.
+            // Parenthesized arrow signatures often look like other valid expressions.
+            // For instance:
+            //  - "(x = 10)" is an assignment expression parsed as a signature with a default parameter value.
+            //  - "(x,y)" is a comma expression parsed as a signature with two parameters.
+            //  - "a ? (b): c" will have "(b):" parsed as a signature with a return type annotation.
+            //
+            // So we need just a bit of lookahead to ensure that it can only be a signature.
+            if (!allowAmbiguity && token() !== 36 /* EqualsGreaterThanToken */ && token() !== 17 /* OpenBraceToken */) {
+                // Returning undefined here will cause our caller to rewind to where we started from.
+                return undefined;
+            }
+            return node;
         }
-        node.arguments = parenthesizeListElements(createNodeArray(argumentsArray));
-        return node;
-    }
-    ts.createCall = createCall;
-    function updateCall(node, expression, typeArguments, argumentsArray) {
-        if (expression !== node.expression || typeArguments !== node.typeArguments || argumentsArray !== node.arguments) {
-            return updateNode(createCall(expression, typeArguments, argumentsArray, /*location*/ node, node.flags), node);
+        function parseArrowFunctionExpressionBody(isAsync) {
+            if (token() === 17 /* OpenBraceToken */) {
+                return parseFunctionBlock(/*allowYield*/ false, /*allowAwait*/ isAsync, /*ignoreMissingOpenBrace*/ false);
+            }
+            if (token() !== 25 /* SemicolonToken */ &&
+                token() !== 89 /* FunctionKeyword */ &&
+                token() !== 75 /* ClassKeyword */ &&
+                isStartOfStatement() &&
+                !isStartOfExpressionStatement()) {
+                // Check if we got a plain statement (i.e. no expression-statements, no function/class expressions/declarations)
+                //
+                // Here we try to recover from a potential error situation in the case where the
+                // user meant to supply a block. For example, if the user wrote:
+                //
+                //  a =>
+                //      let v = 0;
+                //  }
+                //
+                // they may be missing an open brace.  Check to see if that's the case so we can
+                // try to recover better.  If we don't do this, then the next close curly we see may end
+                // up preemptively closing the containing construct.
+                //
+                // Note: even when 'ignoreMissingOpenBrace' is passed as true, parseBody will still error.
+                return parseFunctionBlock(/*allowYield*/ false, /*allowAwait*/ isAsync, /*ignoreMissingOpenBrace*/ true);
+            }
+            return isAsync
+                ? doInAwaitContext(parseAssignmentExpressionOrHigher)
+                : doOutsideOfAwaitContext(parseAssignmentExpressionOrHigher);
         }
-        return node;
-    }
-    ts.updateCall = updateCall;
-    function createNew(expression, typeArguments, argumentsArray, location, flags) {
-        var node = createNode(175 /* NewExpression */, location, flags);
-        node.expression = parenthesizeForNew(expression);
-        node.typeArguments = typeArguments ? createNodeArray(typeArguments) : undefined;
-        node.arguments = argumentsArray ? parenthesizeListElements(createNodeArray(argumentsArray)) : undefined;
-        return node;
-    }
-    ts.createNew = createNew;
-    function updateNew(node, expression, typeArguments, argumentsArray) {
-        if (node.expression !== expression || node.typeArguments !== typeArguments || node.arguments !== argumentsArray) {
-            return updateNode(createNew(expression, typeArguments, argumentsArray, /*location*/ node, node.flags), node);
+        function parseConditionalExpressionRest(leftOperand) {
+            // Note: we are passed in an expression which was produced from parseBinaryExpressionOrHigher.
+            var questionToken = parseOptionalToken(55 /* QuestionToken */);
+            if (!questionToken) {
+                return leftOperand;
+            }
+            // Note: we explicitly 'allowIn' in the whenTrue part of the condition expression, and
+            // we do not that for the 'whenFalse' part.
+            var node = createNode(195 /* ConditionalExpression */, leftOperand.pos);
+            node.condition = leftOperand;
+            node.questionToken = questionToken;
+            node.whenTrue = doOutsideOfContext(disallowInAndDecoratorContext, parseAssignmentExpressionOrHigher);
+            node.colonToken = parseExpectedToken(56 /* ColonToken */, /*reportAtCurrentPosition*/ false, ts.Diagnostics._0_expected, ts.tokenToString(56 /* ColonToken */));
+            node.whenFalse = parseAssignmentExpressionOrHigher();
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateNew = updateNew;
-    function createTaggedTemplate(tag, template, location) {
-        var node = createNode(176 /* TaggedTemplateExpression */, location);
-        node.tag = parenthesizeForAccess(tag);
-        node.template = template;
-        return node;
-    }
-    ts.createTaggedTemplate = createTaggedTemplate;
-    function updateTaggedTemplate(node, tag, template) {
-        if (node.tag !== tag || node.template !== template) {
-            return updateNode(createTaggedTemplate(tag, template, node), node);
+        function parseBinaryExpressionOrHigher(precedence) {
+            var leftOperand = parseUnaryExpressionOrHigher();
+            return parseBinaryExpressionRest(precedence, leftOperand);
         }
-        return node;
-    }
-    ts.updateTaggedTemplate = updateTaggedTemplate;
-    function createParen(expression, location) {
-        var node = createNode(178 /* ParenthesizedExpression */, location);
-        node.expression = expression;
-        return node;
-    }
-    ts.createParen = createParen;
-    function updateParen(node, expression) {
-        if (node.expression !== expression) {
-            return updateNode(createParen(expression, node), node);
+        function isInOrOfKeyword(t) {
+            return t === 92 /* InKeyword */ || t === 142 /* OfKeyword */;
         }
-        return node;
-    }
-    ts.updateParen = updateParen;
-    function createFunctionExpression(asteriskToken, name, typeParameters, parameters, type, body, location, flags) {
-        var node = createNode(179 /* FunctionExpression */, location, flags);
-        node.modifiers = undefined;
-        node.asteriskToken = asteriskToken;
-        node.name = typeof name === "string" ? createIdentifier(name) : name;
-        node.typeParameters = typeParameters ? createNodeArray(typeParameters) : undefined;
-        node.parameters = createNodeArray(parameters);
-        node.type = type;
-        node.body = body;
-        return node;
-    }
-    ts.createFunctionExpression = createFunctionExpression;
-    function updateFunctionExpression(node, name, typeParameters, parameters, type, body) {
-        if (node.name !== name || node.typeParameters !== typeParameters || node.parameters !== parameters || node.type !== type || node.body !== body) {
-            return updateNode(createFunctionExpression(node.asteriskToken, name, typeParameters, parameters, type, body, /*location*/ node, node.flags), node);
+        function parseBinaryExpressionRest(precedence, leftOperand) {
+            while (true) {
+                // We either have a binary operator here, or we're finished.  We call
+                // reScanGreaterToken so that we merge token sequences like > and = into >=
+                reScanGreaterToken();
+                var newPrecedence = getBinaryOperatorPrecedence();
+                // Check the precedence to see if we should "take" this operator
+                // - For left associative operator (all operator but **), consume the operator,
+                //   recursively call the function below, and parse binaryExpression as a rightOperand
+                //   of the caller if the new precedence of the operator is greater then or equal to the current precedence.
+                //   For example:
+                //      a - b - c;
+                //            ^token; leftOperand = b. Return b to the caller as a rightOperand
+                //      a * b - c
+                //            ^token; leftOperand = b. Return b to the caller as a rightOperand
+                //      a - b * c;
+                //            ^token; leftOperand = b. Return b * c to the caller as a rightOperand
+                // - For right associative operator (**), consume the operator, recursively call the function
+                //   and parse binaryExpression as a rightOperand of the caller if the new precedence of
+                //   the operator is strictly grater than the current precedence
+                //   For example:
+                //      a ** b ** c;
+                //             ^^token; leftOperand = b. Return b ** c to the caller as a rightOperand
+                //      a - b ** c;
+                //            ^^token; leftOperand = b. Return b ** c to the caller as a rightOperand
+                //      a ** b - c
+                //             ^token; leftOperand = b. Return b to the caller as a rightOperand
+                var consumeCurrentOperator = token() === 40 /* AsteriskAsteriskToken */ ?
+                    newPrecedence >= precedence :
+                    newPrecedence > precedence;
+                if (!consumeCurrentOperator) {
+                    break;
+                }
+                if (token() === 92 /* InKeyword */ && inDisallowInContext()) {
+                    break;
+                }
+                if (token() === 118 /* AsKeyword */) {
+                    // Make sure we *do* perform ASI for constructs like this:
+                    //    var x = foo
+                    //    as (Bar)
+                    // This should be parsed as an initialized variable, followed
+                    // by a function call to 'as' with the argument 'Bar'
+                    if (scanner.hasPrecedingLineBreak()) {
+                        break;
+                    }
+                    else {
+                        nextToken();
+                        leftOperand = makeAsExpression(leftOperand, parseType());
+                    }
+                }
+                else {
+                    leftOperand = makeBinaryExpression(leftOperand, parseTokenNode(), parseBinaryExpressionOrHigher(newPrecedence));
+                }
+            }
+            return leftOperand;
         }
-        return node;
-    }
-    ts.updateFunctionExpression = updateFunctionExpression;
-    function createArrowFunction(modifiers, typeParameters, parameters, type, equalsGreaterThanToken, body, location, flags) {
-        var node = createNode(180 /* ArrowFunction */, location, flags);
-        node.modifiers = modifiers ? createNodeArray(modifiers) : undefined;
-        node.typeParameters = typeParameters ? createNodeArray(typeParameters) : undefined;
-        node.parameters = createNodeArray(parameters);
-        node.type = type;
-        node.equalsGreaterThanToken = equalsGreaterThanToken || createNode(34 /* EqualsGreaterThanToken */);
-        node.body = parenthesizeConciseBody(body);
-        return node;
-    }
-    ts.createArrowFunction = createArrowFunction;
-    function updateArrowFunction(node, modifiers, typeParameters, parameters, type, body) {
-        if (node.modifiers !== modifiers || node.typeParameters !== typeParameters || node.parameters !== parameters || node.type !== type || node.body !== body) {
-            return updateNode(createArrowFunction(modifiers, typeParameters, parameters, type, node.equalsGreaterThanToken, body, /*location*/ node, node.flags), node);
+        function isBinaryOperator() {
+            if (inDisallowInContext() && token() === 92 /* InKeyword */) {
+                return false;
+            }
+            return getBinaryOperatorPrecedence() > 0;
         }
-        return node;
-    }
-    ts.updateArrowFunction = updateArrowFunction;
-    function createDelete(expression, location) {
-        var node = createNode(181 /* DeleteExpression */, location);
-        node.expression = parenthesizePrefixOperand(expression);
-        return node;
-    }
-    ts.createDelete = createDelete;
-    function updateDelete(node, expression) {
-        if (node.expression !== expression) {
-            return updateNode(createDelete(expression, node), expression);
+        function getBinaryOperatorPrecedence() {
+            switch (token()) {
+                case 54 /* BarBarToken */:
+                    return 1;
+                case 53 /* AmpersandAmpersandToken */:
+                    return 2;
+                case 49 /* BarToken */:
+                    return 3;
+                case 50 /* CaretToken */:
+                    return 4;
+                case 48 /* AmpersandToken */:
+                    return 5;
+                case 32 /* EqualsEqualsToken */:
+                case 33 /* ExclamationEqualsToken */:
+                case 34 /* EqualsEqualsEqualsToken */:
+                case 35 /* ExclamationEqualsEqualsToken */:
+                    return 6;
+                case 27 /* LessThanToken */:
+                case 29 /* GreaterThanToken */:
+                case 30 /* LessThanEqualsToken */:
+                case 31 /* GreaterThanEqualsToken */:
+                case 93 /* InstanceOfKeyword */:
+                case 92 /* InKeyword */:
+                case 118 /* AsKeyword */:
+                    return 7;
+                case 45 /* LessThanLessThanToken */:
+                case 46 /* GreaterThanGreaterThanToken */:
+                case 47 /* GreaterThanGreaterThanGreaterThanToken */:
+                    return 8;
+                case 37 /* PlusToken */:
+                case 38 /* MinusToken */:
+                    return 9;
+                case 39 /* AsteriskToken */:
+                case 41 /* SlashToken */:
+                case 42 /* PercentToken */:
+                    return 10;
+                case 40 /* AsteriskAsteriskToken */:
+                    return 11;
+            }
+            // -1 is lower than all other precedences.  Returning it will cause binary expression
+            // parsing to stop.
+            return -1;
         }
-        return node;
-    }
-    ts.updateDelete = updateDelete;
-    function createTypeOf(expression, location) {
-        var node = createNode(182 /* TypeOfExpression */, location);
-        node.expression = parenthesizePrefixOperand(expression);
-        return node;
-    }
-    ts.createTypeOf = createTypeOf;
-    function updateTypeOf(node, expression) {
-        if (node.expression !== expression) {
-            return updateNode(createTypeOf(expression, node), expression);
+        function makeBinaryExpression(left, operatorToken, right) {
+            var node = createNode(194 /* BinaryExpression */, left.pos);
+            node.left = left;
+            node.operatorToken = operatorToken;
+            node.right = right;
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateTypeOf = updateTypeOf;
-    function createVoid(expression, location) {
-        var node = createNode(183 /* VoidExpression */, location);
-        node.expression = parenthesizePrefixOperand(expression);
-        return node;
-    }
-    ts.createVoid = createVoid;
-    function updateVoid(node, expression) {
-        if (node.expression !== expression) {
-            return updateNode(createVoid(expression, node), node);
+        function makeAsExpression(left, right) {
+            var node = createNode(202 /* AsExpression */, left.pos);
+            node.expression = left;
+            node.type = right;
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateVoid = updateVoid;
-    function createAwait(expression, location) {
-        var node = createNode(184 /* AwaitExpression */, location);
-        node.expression = parenthesizePrefixOperand(expression);
-        return node;
-    }
-    ts.createAwait = createAwait;
-    function updateAwait(node, expression) {
-        if (node.expression !== expression) {
-            return updateNode(createAwait(expression, node), node);
+        function parsePrefixUnaryExpression() {
+            var node = createNode(192 /* PrefixUnaryExpression */);
+            node.operator = token();
+            nextToken();
+            node.operand = parseSimpleUnaryExpression();
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateAwait = updateAwait;
-    function createPrefix(operator, operand, location) {
-        var node = createNode(185 /* PrefixUnaryExpression */, location);
-        node.operator = operator;
-        node.operand = parenthesizePrefixOperand(operand);
-        return node;
-    }
-    ts.createPrefix = createPrefix;
-    function updatePrefix(node, operand) {
-        if (node.operand !== operand) {
-            return updateNode(createPrefix(node.operator, operand, node), node);
+        function parseDeleteExpression() {
+            var node = createNode(188 /* DeleteExpression */);
+            nextToken();
+            node.expression = parseSimpleUnaryExpression();
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updatePrefix = updatePrefix;
-    function createPostfix(operand, operator, location) {
-        var node = createNode(186 /* PostfixUnaryExpression */, location);
-        node.operand = parenthesizePostfixOperand(operand);
-        node.operator = operator;
-        return node;
-    }
-    ts.createPostfix = createPostfix;
-    function updatePostfix(node, operand) {
-        if (node.operand !== operand) {
-            return updateNode(createPostfix(operand, node.operator, node), node);
+        function parseTypeOfExpression() {
+            var node = createNode(189 /* TypeOfExpression */);
+            nextToken();
+            node.expression = parseSimpleUnaryExpression();
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updatePostfix = updatePostfix;
-    function createBinary(left, operator, right, location) {
-        var operatorToken = typeof operator === "number" ? createSynthesizedNode(operator) : operator;
-        var operatorKind = operatorToken.kind;
-        var node = createNode(187 /* BinaryExpression */, location);
-        node.left = parenthesizeBinaryOperand(operatorKind, left, /*isLeftSideOfBinary*/ true, /*leftOperand*/ undefined);
-        node.operatorToken = operatorToken;
-        node.right = parenthesizeBinaryOperand(operatorKind, right, /*isLeftSideOfBinary*/ false, node.left);
-        return node;
-    }
-    ts.createBinary = createBinary;
-    function updateBinary(node, left, right) {
-        if (node.left !== left || node.right !== right) {
-            return updateNode(createBinary(left, node.operatorToken, right, /*location*/ node), node);
+        function parseVoidExpression() {
+            var node = createNode(190 /* VoidExpression */);
+            nextToken();
+            node.expression = parseSimpleUnaryExpression();
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateBinary = updateBinary;
-    function createConditional(condition, questionToken, whenTrue, colonToken, whenFalse, location) {
-        var node = createNode(188 /* ConditionalExpression */, location);
-        node.condition = condition;
-        node.questionToken = questionToken;
-        node.whenTrue = whenTrue;
-        node.colonToken = colonToken;
-        node.whenFalse = whenFalse;
-        return node;
-    }
-    ts.createConditional = createConditional;
-    function updateConditional(node, condition, whenTrue, whenFalse) {
-        if (node.condition !== condition || node.whenTrue !== whenTrue || node.whenFalse !== whenFalse) {
-            return updateNode(createConditional(condition, node.questionToken, whenTrue, node.colonToken, whenFalse, node), node);
+        function isAwaitExpression() {
+            if (token() === 121 /* AwaitKeyword */) {
+                if (inAwaitContext()) {
+                    return true;
+                }
+                // here we are using similar heuristics as 'isYieldExpression'
+                return lookAhead(nextTokenIsIdentifierOrKeywordOrLiteralOnSameLine);
+            }
+            return false;
         }
-        return node;
-    }
-    ts.updateConditional = updateConditional;
-    function createTemplateExpression(head, templateSpans, location) {
-        var node = createNode(189 /* TemplateExpression */, location);
-        node.head = head;
-        node.templateSpans = createNodeArray(templateSpans);
-        return node;
-    }
-    ts.createTemplateExpression = createTemplateExpression;
-    function updateTemplateExpression(node, head, templateSpans) {
-        if (node.head !== head || node.templateSpans !== templateSpans) {
-            return updateNode(createTemplateExpression(head, templateSpans, node), node);
+        function parseAwaitExpression() {
+            var node = createNode(191 /* AwaitExpression */);
+            nextToken();
+            node.expression = parseSimpleUnaryExpression();
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateTemplateExpression = updateTemplateExpression;
-    function createYield(asteriskToken, expression, location) {
-        var node = createNode(190 /* YieldExpression */, location);
-        node.asteriskToken = asteriskToken;
-        node.expression = expression;
-        return node;
-    }
-    ts.createYield = createYield;
-    function updateYield(node, expression) {
-        if (node.expression !== expression) {
-            return updateNode(createYield(node.asteriskToken, expression, node), node);
+        /**
+         * Parse ES7 exponential expression and await expression
+         *
+         * ES7 ExponentiationExpression:
+         *      1) UnaryExpression[?Yield]
+         *      2) UpdateExpression[?Yield] ** ExponentiationExpression[?Yield]
+         *
+         */
+        function parseUnaryExpressionOrHigher() {
+            /**
+             * ES7 UpdateExpression:
+             *      1) LeftHandSideExpression[?Yield]
+             *      2) LeftHandSideExpression[?Yield][no LineTerminator here]++
+             *      3) LeftHandSideExpression[?Yield][no LineTerminator here]--
+             *      4) ++UnaryExpression[?Yield]
+             *      5) --UnaryExpression[?Yield]
+             */
+            if (isUpdateExpression()) {
+                var updateExpression = parseUpdateExpression();
+                return token() === 40 /* AsteriskAsteriskToken */ ?
+                    parseBinaryExpressionRest(getBinaryOperatorPrecedence(), updateExpression) :
+                    updateExpression;
+            }
+            /**
+             * ES7 UnaryExpression:
+             *      1) UpdateExpression[?yield]
+             *      2) delete UpdateExpression[?yield]
+             *      3) void UpdateExpression[?yield]
+             *      4) typeof UpdateExpression[?yield]
+             *      5) + UpdateExpression[?yield]
+             *      6) - UpdateExpression[?yield]
+             *      7) ~ UpdateExpression[?yield]
+             *      8) ! UpdateExpression[?yield]
+             */
+            var unaryOperator = token();
+            var simpleUnaryExpression = parseSimpleUnaryExpression();
+            if (token() === 40 /* AsteriskAsteriskToken */) {
+                var start = ts.skipTrivia(sourceText, simpleUnaryExpression.pos);
+                if (simpleUnaryExpression.kind === 184 /* TypeAssertionExpression */) {
+                    parseErrorAtPosition(start, simpleUnaryExpression.end - start, ts.Diagnostics.A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses);
+                }
+                else {
+                    parseErrorAtPosition(start, simpleUnaryExpression.end - start, ts.Diagnostics.An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses, ts.tokenToString(unaryOperator));
+                }
+            }
+            return simpleUnaryExpression;
         }
-        return node;
-    }
-    ts.updateYield = updateYield;
-    function createSpread(expression, location) {
-        var node = createNode(191 /* SpreadElementExpression */, location);
-        node.expression = parenthesizeExpressionForList(expression);
-        return node;
-    }
-    ts.createSpread = createSpread;
-    function updateSpread(node, expression) {
-        if (node.expression !== expression) {
-            return updateNode(createSpread(expression, node), node);
+        /**
+         * Parse ES7 simple-unary expression or higher:
+         *
+         * ES7 UnaryExpression:
+         *      1) UpdateExpression[?yield]
+         *      2) delete UnaryExpression[?yield]
+         *      3) void UnaryExpression[?yield]
+         *      4) typeof UnaryExpression[?yield]
+         *      5) + UnaryExpression[?yield]
+         *      6) - UnaryExpression[?yield]
+         *      7) ~ UnaryExpression[?yield]
+         *      8) ! UnaryExpression[?yield]
+         *      9) [+Await] await UnaryExpression[?yield]
+         */
+        function parseSimpleUnaryExpression() {
+            switch (token()) {
+                case 37 /* PlusToken */:
+                case 38 /* MinusToken */:
+                case 52 /* TildeToken */:
+                case 51 /* ExclamationToken */:
+                    return parsePrefixUnaryExpression();
+                case 80 /* DeleteKeyword */:
+                    return parseDeleteExpression();
+                case 103 /* TypeOfKeyword */:
+                    return parseTypeOfExpression();
+                case 105 /* VoidKeyword */:
+                    return parseVoidExpression();
+                case 27 /* LessThanToken */:
+                    // This is modified UnaryExpression grammar in TypeScript
+                    //  UnaryExpression (modified):
+                    //      < type > UnaryExpression
+                    return parseTypeAssertion();
+                case 121 /* AwaitKeyword */:
+                    if (isAwaitExpression()) {
+                        return parseAwaitExpression();
+                    }
+                // falls through
+                default:
+                    return parseUpdateExpression();
+            }
         }
-        return node;
-    }
-    ts.updateSpread = updateSpread;
-    function createClassExpression(modifiers, name, typeParameters, heritageClauses, members, location) {
-        var node = createNode(192 /* ClassExpression */, location);
-        node.decorators = undefined;
-        node.modifiers = modifiers ? createNodeArray(modifiers) : undefined;
-        node.name = name;
-        node.typeParameters = typeParameters ? createNodeArray(typeParameters) : undefined;
-        node.heritageClauses = createNodeArray(heritageClauses);
-        node.members = createNodeArray(members);
-        return node;
-    }
-    ts.createClassExpression = createClassExpression;
-    function updateClassExpression(node, modifiers, name, typeParameters, heritageClauses, members) {
-        if (node.modifiers !== modifiers || node.name !== name || node.typeParameters !== typeParameters || node.heritageClauses !== heritageClauses || node.members !== members) {
-            return updateNode(createClassExpression(modifiers, name, typeParameters, heritageClauses, members, node), node);
+        /**
+         * Check if the current token can possibly be an ES7 increment expression.
+         *
+         * ES7 UpdateExpression:
+         *      LeftHandSideExpression[?Yield]
+         *      LeftHandSideExpression[?Yield][no LineTerminator here]++
+         *      LeftHandSideExpression[?Yield][no LineTerminator here]--
+         *      ++LeftHandSideExpression[?Yield]
+         *      --LeftHandSideExpression[?Yield]
+         */
+        function isUpdateExpression() {
+            // This function is called inside parseUnaryExpression to decide
+            // whether to call parseSimpleUnaryExpression or call parseUpdateExpression directly
+            switch (token()) {
+                case 37 /* PlusToken */:
+                case 38 /* MinusToken */:
+                case 52 /* TildeToken */:
+                case 51 /* ExclamationToken */:
+                case 80 /* DeleteKeyword */:
+                case 103 /* TypeOfKeyword */:
+                case 105 /* VoidKeyword */:
+                case 121 /* AwaitKeyword */:
+                    return false;
+                case 27 /* LessThanToken */:
+                    // If we are not in JSX context, we are parsing TypeAssertion which is an UnaryExpression
+                    if (sourceFile.languageVariant !== 1 /* JSX */) {
+                        return false;
+                    }
+                // We are in JSX context and the token is part of JSXElement.
+                // falls through
+                default:
+                    return true;
+            }
         }
-        return node;
-    }
-    ts.updateClassExpression = updateClassExpression;
-    function createOmittedExpression(location) {
-        var node = createNode(193 /* OmittedExpression */, location);
-        return node;
-    }
-    ts.createOmittedExpression = createOmittedExpression;
-    function createExpressionWithTypeArguments(typeArguments, expression, location) {
-        var node = createNode(194 /* ExpressionWithTypeArguments */, location);
-        node.typeArguments = typeArguments ? createNodeArray(typeArguments) : undefined;
-        node.expression = parenthesizeForAccess(expression);
-        return node;
-    }
-    ts.createExpressionWithTypeArguments = createExpressionWithTypeArguments;
-    function updateExpressionWithTypeArguments(node, typeArguments, expression) {
-        if (node.typeArguments !== typeArguments || node.expression !== expression) {
-            return updateNode(createExpressionWithTypeArguments(typeArguments, expression, node), node);
+        /**
+         * Parse ES7 UpdateExpression. UpdateExpression is used instead of ES6's PostFixExpression.
+         *
+         * ES7 UpdateExpression[yield]:
+         *      1) LeftHandSideExpression[?yield]
+         *      2) LeftHandSideExpression[?yield] [[no LineTerminator here]]++
+         *      3) LeftHandSideExpression[?yield] [[no LineTerminator here]]--
+         *      4) ++LeftHandSideExpression[?yield]
+         *      5) --LeftHandSideExpression[?yield]
+         * In TypeScript (2), (3) are parsed as PostfixUnaryExpression. (4), (5) are parsed as PrefixUnaryExpression
+         */
+        function parseUpdateExpression() {
+            if (token() === 43 /* PlusPlusToken */ || token() === 44 /* MinusMinusToken */) {
+                var node = createNode(192 /* PrefixUnaryExpression */);
+                node.operator = token();
+                nextToken();
+                node.operand = parseLeftHandSideExpressionOrHigher();
+                return finishNode(node);
+            }
+            else if (sourceFile.languageVariant === 1 /* JSX */ && token() === 27 /* LessThanToken */ && lookAhead(nextTokenIsIdentifierOrKeyword)) {
+                // JSXElement is part of primaryExpression
+                return parseJsxElementOrSelfClosingElement(/*inExpressionContext*/ true);
+            }
+            var expression = parseLeftHandSideExpressionOrHigher();
+            ts.Debug.assert(ts.isLeftHandSideExpression(expression));
+            if ((token() === 43 /* PlusPlusToken */ || token() === 44 /* MinusMinusToken */) && !scanner.hasPrecedingLineBreak()) {
+                var node = createNode(193 /* PostfixUnaryExpression */, expression.pos);
+                node.operand = expression;
+                node.operator = token();
+                nextToken();
+                return finishNode(node);
+            }
+            return expression;
         }
-        return node;
-    }
-    ts.updateExpressionWithTypeArguments = updateExpressionWithTypeArguments;
-    // Misc
-    function createTemplateSpan(expression, literal, location) {
-        var node = createNode(197 /* TemplateSpan */, location);
-        node.expression = expression;
-        node.literal = literal;
-        return node;
-    }
-    ts.createTemplateSpan = createTemplateSpan;
-    function updateTemplateSpan(node, expression, literal) {
-        if (node.expression !== expression || node.literal !== literal) {
-            return updateNode(createTemplateSpan(expression, literal, node), node);
+        function parseLeftHandSideExpressionOrHigher() {
+            // Original Ecma:
+            // LeftHandSideExpression: See 11.2
+            //      NewExpression
+            //      CallExpression
+            //
+            // Our simplification:
+            //
+            // LeftHandSideExpression: See 11.2
+            //      MemberExpression
+            //      CallExpression
+            //
+            // See comment in parseMemberExpressionOrHigher on how we replaced NewExpression with
+            // MemberExpression to make our lives easier.
+            //
+            // to best understand the below code, it's important to see how CallExpression expands
+            // out into its own productions:
+            //
+            // CallExpression:
+            //      MemberExpression Arguments
+            //      CallExpression Arguments
+            //      CallExpression[Expression]
+            //      CallExpression.IdentifierName
+            //      import (AssignmentExpression)
+            //      super Arguments
+            //      super.IdentifierName
+            //
+            // Because of the recursion in these calls, we need to bottom out first. There are three
+            // bottom out states we can run into: 1) We see 'super' which must start either of
+            // the last two CallExpression productions. 2) We see 'import' which must start import call.
+            // 3)we have a MemberExpression which either completes the LeftHandSideExpression,
+            // or starts the beginning of the first four CallExpression productions.
+            var expression;
+            if (token() === 91 /* ImportKeyword */) {
+                // We don't want to eagerly consume all import keyword as import call expression so we look a head to find "("
+                // For example:
+                //      var foo3 = require("subfolder
+                //      import * as foo1 from "module-from-node  -> we want this import to be a statement rather than import call expression
+                sourceFile.flags |= 524288 /* PossiblyContainsDynamicImport */;
+                expression = parseTokenNode();
+            }
+            else {
+                expression = token() === 97 /* SuperKeyword */ ? parseSuperExpression() : parseMemberExpressionOrHigher();
+            }
+            // Now, we *may* be complete.  However, we might have consumed the start of a
+            // CallExpression.  As such, we need to consume the rest of it here to be complete.
+            return parseCallExpressionRest(expression);
         }
-        return node;
-    }
-    ts.updateTemplateSpan = updateTemplateSpan;
-    // Element
-    function createBlock(statements, location, multiLine, flags) {
-        var block = createNode(199 /* Block */, location, flags);
-        block.statements = createNodeArray(statements);
-        if (multiLine) {
-            block.multiLine = true;
+        function parseMemberExpressionOrHigher() {
+            // Note: to make our lives simpler, we decompose the NewExpression productions and
+            // place ObjectCreationExpression and FunctionExpression into PrimaryExpression.
+            // like so:
+            //
+            //   PrimaryExpression : See 11.1
+            //      this
+            //      Identifier
+            //      Literal
+            //      ArrayLiteral
+            //      ObjectLiteral
+            //      (Expression)
+            //      FunctionExpression
+            //      new MemberExpression Arguments?
+            //
+            //   MemberExpression : See 11.2
+            //      PrimaryExpression
+            //      MemberExpression[Expression]
+            //      MemberExpression.IdentifierName
+            //
+            //   CallExpression : See 11.2
+            //      MemberExpression
+            //      CallExpression Arguments
+            //      CallExpression[Expression]
+            //      CallExpression.IdentifierName
+            //
+            // Technically this is ambiguous.  i.e. CallExpression defines:
+            //
+            //   CallExpression:
+            //      CallExpression Arguments
+            //
+            // If you see: "new Foo()"
+            //
+            // Then that could be treated as a single ObjectCreationExpression, or it could be
+            // treated as the invocation of "new Foo".  We disambiguate that in code (to match
+            // the original grammar) by making sure that if we see an ObjectCreationExpression
+            // we always consume arguments if they are there. So we treat "new Foo()" as an
+            // object creation only, and not at all as an invocation)  Another way to think
+            // about this is that for every "new" that we see, we will consume an argument list if
+            // it is there as part of the *associated* object creation node.  Any additional
+            // argument lists we see, will become invocation expressions.
+            //
+            // Because there are no other places in the grammar now that refer to FunctionExpression
+            // or ObjectCreationExpression, it is safe to push down into the PrimaryExpression
+            // production.
+            //
+            // Because CallExpression and MemberExpression are left recursive, we need to bottom out
+            // of the recursion immediately.  So we parse out a primary expression to start with.
+            var expression = parsePrimaryExpression();
+            return parseMemberExpressionRest(expression);
         }
-        return block;
-    }
-    ts.createBlock = createBlock;
-    function updateBlock(node, statements) {
-        if (statements !== node.statements) {
-            return updateNode(createBlock(statements, /*location*/ node, node.multiLine, node.flags), node);
+        function parseSuperExpression() {
+            var expression = parseTokenNode();
+            if (token() === 19 /* OpenParenToken */ || token() === 23 /* DotToken */ || token() === 21 /* OpenBracketToken */) {
+                return expression;
+            }
+            // If we have seen "super" it must be followed by '(' or '.'.
+            // If it wasn't then just try to parse out a '.' and report an error.
+            var node = createNode(179 /* PropertyAccessExpression */, expression.pos);
+            node.expression = expression;
+            parseExpectedToken(23 /* DotToken */, /*reportAtCurrentPosition*/ false, ts.Diagnostics.super_must_be_followed_by_an_argument_list_or_member_access);
+            node.name = parseRightSideOfDot(/*allowIdentifierNames*/ true);
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateBlock = updateBlock;
-    function createVariableStatement(modifiers, declarationList, location, flags) {
-        var node = createNode(200 /* VariableStatement */, location, flags);
-        node.decorators = undefined;
-        node.modifiers = modifiers ? createNodeArray(modifiers) : undefined;
-        node.declarationList = ts.isArray(declarationList) ? createVariableDeclarationList(declarationList) : declarationList;
-        return node;
-    }
-    ts.createVariableStatement = createVariableStatement;
-    function updateVariableStatement(node, modifiers, declarationList) {
-        if (node.modifiers !== modifiers || node.declarationList !== declarationList) {
-            return updateNode(createVariableStatement(modifiers, declarationList, /*location*/ node, node.flags), node);
+        function tagNamesAreEquivalent(lhs, rhs) {
+            if (lhs.kind !== rhs.kind) {
+                return false;
+            }
+            if (lhs.kind === 71 /* Identifier */) {
+                return lhs.text === rhs.text;
+            }
+            if (lhs.kind === 99 /* ThisKeyword */) {
+                return true;
+            }
+            // If we are at this statement then we must have PropertyAccessExpression and because tag name in Jsx element can only
+            // take forms of JsxTagNameExpression which includes an identifier, "this" expression, or another propertyAccessExpression
+            // it is safe to case the expression property as such. See parseJsxElementName for how we parse tag name in Jsx element
+            return lhs.name.text === rhs.name.text &&
+                tagNamesAreEquivalent(lhs.expression, rhs.expression);
         }
-        return node;
-    }
-    ts.updateVariableStatement = updateVariableStatement;
-    function createVariableDeclarationList(declarations, location, flags) {
-        var node = createNode(219 /* VariableDeclarationList */, location, flags);
-        node.declarations = createNodeArray(declarations);
-        return node;
-    }
-    ts.createVariableDeclarationList = createVariableDeclarationList;
-    function updateVariableDeclarationList(node, declarations) {
-        if (node.declarations !== declarations) {
-            return updateNode(createVariableDeclarationList(declarations, /*location*/ node, node.flags), node);
+        function parseJsxElementOrSelfClosingElement(inExpressionContext) {
+            var opening = parseJsxOpeningOrSelfClosingElement(inExpressionContext);
+            var result;
+            if (opening.kind === 251 /* JsxOpeningElement */) {
+                var node = createNode(249 /* JsxElement */, opening.pos);
+                node.openingElement = opening;
+                node.children = parseJsxChildren(node.openingElement.tagName);
+                node.closingElement = parseJsxClosingElement(inExpressionContext);
+                if (!tagNamesAreEquivalent(node.openingElement.tagName, node.closingElement.tagName)) {
+                    parseErrorAtPosition(node.closingElement.pos, node.closingElement.end - node.closingElement.pos, ts.Diagnostics.Expected_corresponding_JSX_closing_tag_for_0, ts.getTextOfNodeFromSourceText(sourceText, node.openingElement.tagName));
+                }
+                result = finishNode(node);
+            }
+            else {
+                ts.Debug.assert(opening.kind === 250 /* JsxSelfClosingElement */);
+                // Nothing else to do for self-closing elements
+                result = opening;
+            }
+            // If the user writes the invalid code '<div></div><div></div>' in an expression context (i.e. not wrapped in
+            // an enclosing tag), we'll naively try to parse   ^ this as a 'less than' operator and the remainder of the tag
+            // as garbage, which will cause the formatter to badly mangle the JSX. Perform a speculative parse of a JSX
+            // element if we see a < token so that we can wrap it in a synthetic binary expression so the formatter
+            // does less damage and we can report a better error.
+            // Since JSX elements are invalid < operands anyway, this lookahead parse will only occur in error scenarios
+            // of one sort or another.
+            if (inExpressionContext && token() === 27 /* LessThanToken */) {
+                var invalidElement = tryParse(function () { return parseJsxElementOrSelfClosingElement(/*inExpressionContext*/ true); });
+                if (invalidElement) {
+                    parseErrorAtCurrentToken(ts.Diagnostics.JSX_expressions_must_have_one_parent_element);
+                    var badNode = createNode(194 /* BinaryExpression */, result.pos);
+                    badNode.end = invalidElement.end;
+                    badNode.left = result;
+                    badNode.right = invalidElement;
+                    badNode.operatorToken = createMissingNode(26 /* CommaToken */, /*reportAtCurrentPosition*/ false, /*diagnosticMessage*/ undefined);
+                    badNode.operatorToken.pos = badNode.operatorToken.end = badNode.right.pos;
+                    return badNode;
+                }
+            }
+            return result;
         }
-        return node;
-    }
-    ts.updateVariableDeclarationList = updateVariableDeclarationList;
-    function createVariableDeclaration(name, type, initializer, location, flags) {
-        var node = createNode(218 /* VariableDeclaration */, location, flags);
-        node.name = typeof name === "string" ? createIdentifier(name) : name;
-        node.type = type;
-        node.initializer = initializer !== undefined ? parenthesizeExpressionForList(initializer) : undefined;
-        return node;
-    }
-    ts.createVariableDeclaration = createVariableDeclaration;
-    function updateVariableDeclaration(node, name, type, initializer) {
-        if (node.name !== name || node.type !== type || node.initializer !== initializer) {
-            return updateNode(createVariableDeclaration(name, type, initializer, /*location*/ node, node.flags), node);
+        function parseJsxText() {
+            var node = createNode(10 /* JsxText */, scanner.getStartPos());
+            node.containsOnlyWhiteSpaces = currentToken === 11 /* JsxTextAllWhiteSpaces */;
+            currentToken = scanner.scanJsxToken();
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateVariableDeclaration = updateVariableDeclaration;
-    function createEmptyStatement(location) {
-        return createNode(201 /* EmptyStatement */, location);
-    }
-    ts.createEmptyStatement = createEmptyStatement;
-    function createStatement(expression, location, flags) {
-        var node = createNode(202 /* ExpressionStatement */, location, flags);
-        node.expression = parenthesizeExpressionForExpressionStatement(expression);
-        return node;
-    }
-    ts.createStatement = createStatement;
-    function updateStatement(node, expression) {
-        if (node.expression !== expression) {
-            return updateNode(createStatement(expression, /*location*/ node, node.flags), node);
+        function parseJsxChild() {
+            switch (token()) {
+                case 10 /* JsxText */:
+                case 11 /* JsxTextAllWhiteSpaces */:
+                    return parseJsxText();
+                case 17 /* OpenBraceToken */:
+                    return parseJsxExpression(/*inExpressionContext*/ false);
+                case 27 /* LessThanToken */:
+                    return parseJsxElementOrSelfClosingElement(/*inExpressionContext*/ false);
+            }
+            ts.Debug.fail("Unknown JSX child kind " + token());
         }
-        return node;
-    }
-    ts.updateStatement = updateStatement;
-    function createIf(expression, thenStatement, elseStatement, location) {
-        var node = createNode(203 /* IfStatement */, location);
-        node.expression = expression;
-        node.thenStatement = thenStatement;
-        node.elseStatement = elseStatement;
-        return node;
-    }
-    ts.createIf = createIf;
-    function updateIf(node, expression, thenStatement, elseStatement) {
-        if (node.expression !== expression || node.thenStatement !== thenStatement || node.elseStatement !== elseStatement) {
-            return updateNode(createIf(expression, thenStatement, elseStatement, /*location*/ node), node);
+        function parseJsxChildren(openingTagName) {
+            var result = createNodeArray();
+            var saveParsingContext = parsingContext;
+            parsingContext |= 1 << 14 /* JsxChildren */;
+            while (true) {
+                currentToken = scanner.reScanJsxToken();
+                if (token() === 28 /* LessThanSlashToken */) {
+                    // Closing tag
+                    break;
+                }
+                else if (token() === 1 /* EndOfFileToken */) {
+                    // If we hit EOF, issue the error at the tag that lacks the closing element
+                    // rather than at the end of the file (which is useless)
+                    parseErrorAtPosition(openingTagName.pos, openingTagName.end - openingTagName.pos, ts.Diagnostics.JSX_element_0_has_no_corresponding_closing_tag, ts.getTextOfNodeFromSourceText(sourceText, openingTagName));
+                    break;
+                }
+                else if (token() === 7 /* ConflictMarkerTrivia */) {
+                    break;
+                }
+                var child = parseJsxChild();
+                if (child) {
+                    result.push(child);
+                }
+            }
+            result.end = scanner.getTokenPos();
+            parsingContext = saveParsingContext;
+            return result;
         }
-        return node;
-    }
-    ts.updateIf = updateIf;
-    function createDo(statement, expression, location) {
-        var node = createNode(204 /* DoStatement */, location);
-        node.statement = statement;
-        node.expression = expression;
-        return node;
-    }
-    ts.createDo = createDo;
-    function updateDo(node, statement, expression) {
-        if (node.statement !== statement || node.expression !== expression) {
-            return updateNode(createDo(statement, expression, node), node);
+        function parseJsxAttributes() {
+            var jsxAttributes = createNode(254 /* JsxAttributes */);
+            jsxAttributes.properties = parseList(13 /* JsxAttributes */, parseJsxAttribute);
+            return finishNode(jsxAttributes);
         }
-        return node;
-    }
-    ts.updateDo = updateDo;
-    function createWhile(expression, statement, location) {
-        var node = createNode(205 /* WhileStatement */, location);
-        node.expression = expression;
-        node.statement = statement;
-        return node;
-    }
-    ts.createWhile = createWhile;
-    function updateWhile(node, expression, statement) {
-        if (node.expression !== expression || node.statement !== statement) {
-            return updateNode(createWhile(expression, statement, node), node);
+        function parseJsxOpeningOrSelfClosingElement(inExpressionContext) {
+            var fullStart = scanner.getStartPos();
+            parseExpected(27 /* LessThanToken */);
+            var tagName = parseJsxElementName();
+            var attributes = parseJsxAttributes();
+            var node;
+            if (token() === 29 /* GreaterThanToken */) {
+                // Closing tag, so scan the immediately-following text with the JSX scanning instead
+                // of regular scanning to avoid treating illegal characters (e.g. '#') as immediate
+                // scanning errors
+                node = createNode(251 /* JsxOpeningElement */, fullStart);
+                scanJsxText();
+            }
+            else {
+                parseExpected(41 /* SlashToken */);
+                if (inExpressionContext) {
+                    parseExpected(29 /* GreaterThanToken */);
+                }
+                else {
+                    parseExpected(29 /* GreaterThanToken */, /*diagnostic*/ undefined, /*shouldAdvance*/ false);
+                    scanJsxText();
+                }
+                node = createNode(250 /* JsxSelfClosingElement */, fullStart);
+            }
+            node.tagName = tagName;
+            node.attributes = attributes;
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateWhile = updateWhile;
-    function createFor(initializer, condition, incrementor, statement, location) {
-        var node = createNode(206 /* ForStatement */, location, /*flags*/ undefined);
-        node.initializer = initializer;
-        node.condition = condition;
-        node.incrementor = incrementor;
-        node.statement = statement;
-        return node;
-    }
-    ts.createFor = createFor;
-    function updateFor(node, initializer, condition, incrementor, statement) {
-        if (node.initializer !== initializer || node.condition !== condition || node.incrementor !== incrementor || node.statement !== statement) {
-            return updateNode(createFor(initializer, condition, incrementor, statement, node), node);
+        function parseJsxElementName() {
+            scanJsxIdentifier();
+            // JsxElement can have name in the form of
+            //      propertyAccessExpression
+            //      primaryExpression in the form of an identifier and "this" keyword
+            // We can't just simply use parseLeftHandSideExpressionOrHigher because then we will start consider class,function etc as a keyword
+            // We only want to consider "this" as a primaryExpression
+            var expression = token() === 99 /* ThisKeyword */ ?
+                parseTokenNode() : parseIdentifierName();
+            while (parseOptional(23 /* DotToken */)) {
+                var propertyAccess = createNode(179 /* PropertyAccessExpression */, expression.pos);
+                propertyAccess.expression = expression;
+                propertyAccess.name = parseRightSideOfDot(/*allowIdentifierNames*/ true);
+                expression = finishNode(propertyAccess);
+            }
+            return expression;
+        }
+        function parseJsxExpression(inExpressionContext) {
+            var node = createNode(256 /* JsxExpression */);
+            parseExpected(17 /* OpenBraceToken */);
+            if (token() !== 18 /* CloseBraceToken */) {
+                node.dotDotDotToken = parseOptionalToken(24 /* DotDotDotToken */);
+                node.expression = parseAssignmentExpressionOrHigher();
+            }
+            if (inExpressionContext) {
+                parseExpected(18 /* CloseBraceToken */);
+            }
+            else {
+                parseExpected(18 /* CloseBraceToken */, /*message*/ undefined, /*shouldAdvance*/ false);
+                scanJsxText();
+            }
+            return finishNode(node);
+        }
+        function parseJsxAttribute() {
+            if (token() === 17 /* OpenBraceToken */) {
+                return parseJsxSpreadAttribute();
+            }
+            scanJsxIdentifier();
+            var node = createNode(253 /* JsxAttribute */);
+            node.name = parseIdentifierName();
+            if (token() === 58 /* EqualsToken */) {
+                switch (scanJsxAttributeValue()) {
+                    case 9 /* StringLiteral */:
+                        node.initializer = parseLiteralNode();
+                        break;
+                    default:
+                        node.initializer = parseJsxExpression(/*inExpressionContext*/ true);
+                        break;
+                }
+            }
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateFor = updateFor;
-    function createForIn(initializer, expression, statement, location) {
-        var node = createNode(207 /* ForInStatement */, location);
-        node.initializer = initializer;
-        node.expression = expression;
-        node.statement = statement;
-        return node;
-    }
-    ts.createForIn = createForIn;
-    function updateForIn(node, initializer, expression, statement) {
-        if (node.initializer !== initializer || node.expression !== expression || node.statement !== statement) {
-            return updateNode(createForIn(initializer, expression, statement, node), node);
+        function parseJsxSpreadAttribute() {
+            var node = createNode(255 /* JsxSpreadAttribute */);
+            parseExpected(17 /* OpenBraceToken */);
+            parseExpected(24 /* DotDotDotToken */);
+            node.expression = parseExpression();
+            parseExpected(18 /* CloseBraceToken */);
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateForIn = updateForIn;
-    function createForOf(initializer, expression, statement, location) {
-        var node = createNode(208 /* ForOfStatement */, location);
-        node.initializer = initializer;
-        node.expression = expression;
-        node.statement = statement;
-        return node;
-    }
-    ts.createForOf = createForOf;
-    function updateForOf(node, initializer, expression, statement) {
-        if (node.initializer !== initializer || node.expression !== expression || node.statement !== statement) {
-            return updateNode(createForOf(initializer, expression, statement, node), node);
+        function parseJsxClosingElement(inExpressionContext) {
+            var node = createNode(252 /* JsxClosingElement */);
+            parseExpected(28 /* LessThanSlashToken */);
+            node.tagName = parseJsxElementName();
+            if (inExpressionContext) {
+                parseExpected(29 /* GreaterThanToken */);
+            }
+            else {
+                parseExpected(29 /* GreaterThanToken */, /*diagnostic*/ undefined, /*shouldAdvance*/ false);
+                scanJsxText();
+            }
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateForOf = updateForOf;
-    function createContinue(label, location) {
-        var node = createNode(209 /* ContinueStatement */, location);
-        if (label) {
-            node.label = label;
+        function parseTypeAssertion() {
+            var node = createNode(184 /* TypeAssertionExpression */);
+            parseExpected(27 /* LessThanToken */);
+            node.type = parseType();
+            parseExpected(29 /* GreaterThanToken */);
+            node.expression = parseSimpleUnaryExpression();
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.createContinue = createContinue;
-    function updateContinue(node, label) {
-        if (node.label !== label) {
-            return updateNode(createContinue(label, node), node);
+        function parseMemberExpressionRest(expression) {
+            while (true) {
+                var dotToken = parseOptionalToken(23 /* DotToken */);
+                if (dotToken) {
+                    var propertyAccess = createNode(179 /* PropertyAccessExpression */, expression.pos);
+                    propertyAccess.expression = expression;
+                    propertyAccess.name = parseRightSideOfDot(/*allowIdentifierNames*/ true);
+                    expression = finishNode(propertyAccess);
+                    continue;
+                }
+                if (token() === 51 /* ExclamationToken */ && !scanner.hasPrecedingLineBreak()) {
+                    nextToken();
+                    var nonNullExpression = createNode(203 /* NonNullExpression */, expression.pos);
+                    nonNullExpression.expression = expression;
+                    expression = finishNode(nonNullExpression);
+                    continue;
+                }
+                // when in the [Decorator] context, we do not parse ElementAccess as it could be part of a ComputedPropertyName
+                if (!inDecoratorContext() && parseOptional(21 /* OpenBracketToken */)) {
+                    var indexedAccess = createNode(180 /* ElementAccessExpression */, expression.pos);
+                    indexedAccess.expression = expression;
+                    // It's not uncommon for a user to write: "new Type[]".
+                    // Check for that common pattern and report a better error message.
+                    if (token() !== 22 /* CloseBracketToken */) {
+                        indexedAccess.argumentExpression = allowInAnd(parseExpression);
+                        if (indexedAccess.argumentExpression.kind === 9 /* StringLiteral */ || indexedAccess.argumentExpression.kind === 8 /* NumericLiteral */) {
+                            var literal = indexedAccess.argumentExpression;
+                            literal.text = internIdentifier(literal.text);
+                        }
+                    }
+                    parseExpected(22 /* CloseBracketToken */);
+                    expression = finishNode(indexedAccess);
+                    continue;
+                }
+                if (token() === 13 /* NoSubstitutionTemplateLiteral */ || token() === 14 /* TemplateHead */) {
+                    var tagExpression = createNode(183 /* TaggedTemplateExpression */, expression.pos);
+                    tagExpression.tag = expression;
+                    tagExpression.template = token() === 13 /* NoSubstitutionTemplateLiteral */
+                        ? parseLiteralNode()
+                        : parseTemplateExpression();
+                    expression = finishNode(tagExpression);
+                    continue;
+                }
+                return expression;
+            }
         }
-        return node;
-    }
-    ts.updateContinue = updateContinue;
-    function createBreak(label, location) {
-        var node = createNode(210 /* BreakStatement */, location);
-        if (label) {
-            node.label = label;
+        function parseCallExpressionRest(expression) {
+            while (true) {
+                expression = parseMemberExpressionRest(expression);
+                if (token() === 27 /* LessThanToken */) {
+                    // See if this is the start of a generic invocation.  If so, consume it and
+                    // keep checking for postfix expressions.  Otherwise, it's just a '<' that's
+                    // part of an arithmetic expression.  Break out so we consume it higher in the
+                    // stack.
+                    var typeArguments = tryParse(parseTypeArgumentsInExpression);
+                    if (!typeArguments) {
+                        return expression;
+                    }
+                    var callExpr = createNode(181 /* CallExpression */, expression.pos);
+                    callExpr.expression = expression;
+                    callExpr.typeArguments = typeArguments;
+                    callExpr.arguments = parseArgumentList();
+                    expression = finishNode(callExpr);
+                    continue;
+                }
+                else if (token() === 19 /* OpenParenToken */) {
+                    var callExpr = createNode(181 /* CallExpression */, expression.pos);
+                    callExpr.expression = expression;
+                    callExpr.arguments = parseArgumentList();
+                    expression = finishNode(callExpr);
+                    continue;
+                }
+                return expression;
+            }
         }
-        return node;
-    }
-    ts.createBreak = createBreak;
-    function updateBreak(node, label) {
-        if (node.label !== label) {
-            return updateNode(createBreak(label, node), node);
+        function parseArgumentList() {
+            parseExpected(19 /* OpenParenToken */);
+            var result = parseDelimitedList(11 /* ArgumentExpressions */, parseArgumentExpression);
+            parseExpected(20 /* CloseParenToken */);
+            return result;
         }
-        return node;
-    }
-    ts.updateBreak = updateBreak;
-    function createReturn(expression, location) {
-        var node = createNode(211 /* ReturnStatement */, location);
-        node.expression = expression;
-        return node;
-    }
-    ts.createReturn = createReturn;
-    function updateReturn(node, expression) {
-        if (node.expression !== expression) {
-            return updateNode(createReturn(expression, /*location*/ node), node);
+        function parseTypeArgumentsInExpression() {
+            if (!parseOptional(27 /* LessThanToken */)) {
+                return undefined;
+            }
+            var typeArguments = parseDelimitedList(19 /* TypeArguments */, parseType);
+            if (!parseExpected(29 /* GreaterThanToken */)) {
+                // If it doesn't have the closing >  then it's definitely not an type argument list.
+                return undefined;
+            }
+            // If we have a '<', then only parse this as a argument list if the type arguments
+            // are complete and we have an open paren.  if we don't, rewind and return nothing.
+            return typeArguments && canFollowTypeArgumentsInExpression()
+                ? typeArguments
+                : undefined;
         }
-        return node;
-    }
-    ts.updateReturn = updateReturn;
-    function createWith(expression, statement, location) {
-        var node = createNode(212 /* WithStatement */, location);
-        node.expression = expression;
-        node.statement = statement;
-        return node;
-    }
-    ts.createWith = createWith;
-    function updateWith(node, expression, statement) {
-        if (node.expression !== expression || node.statement !== statement) {
-            return updateNode(createWith(expression, statement, node), node);
+        function canFollowTypeArgumentsInExpression() {
+            switch (token()) {
+                case 19 /* OpenParenToken */: // foo<x>(
+                // this case are the only case where this token can legally follow a type argument
+                // list.  So we definitely want to treat this as a type arg list.
+                case 23 /* DotToken */: // foo<x>.
+                case 20 /* CloseParenToken */: // foo<x>)
+                case 22 /* CloseBracketToken */: // foo<x>]
+                case 56 /* ColonToken */: // foo<x>:
+                case 25 /* SemicolonToken */: // foo<x>;
+                case 55 /* QuestionToken */: // foo<x>?
+                case 32 /* EqualsEqualsToken */: // foo<x> ==
+                case 34 /* EqualsEqualsEqualsToken */: // foo<x> ===
+                case 33 /* ExclamationEqualsToken */: // foo<x> !=
+                case 35 /* ExclamationEqualsEqualsToken */: // foo<x> !==
+                case 53 /* AmpersandAmpersandToken */: // foo<x> &&
+                case 54 /* BarBarToken */: // foo<x> ||
+                case 50 /* CaretToken */: // foo<x> ^
+                case 48 /* AmpersandToken */: // foo<x> &
+                case 49 /* BarToken */: // foo<x> |
+                case 18 /* CloseBraceToken */: // foo<x> }
+                case 1 /* EndOfFileToken */:
+                    // these cases can't legally follow a type arg list.  However, they're not legal
+                    // expressions either.  The user is probably in the middle of a generic type. So
+                    // treat it as such.
+                    return true;
+                case 26 /* CommaToken */: // foo<x>,
+                case 17 /* OpenBraceToken */: // foo<x> {
+                // We don't want to treat these as type arguments.  Otherwise we'll parse this
+                // as an invocation expression.  Instead, we want to parse out the expression
+                // in isolation from the type arguments.
+                default:
+                    // Anything else treat as an expression.
+                    return false;
+            }
         }
-        return node;
-    }
-    ts.updateWith = updateWith;
-    function createSwitch(expression, caseBlock, location) {
-        var node = createNode(213 /* SwitchStatement */, location);
-        node.expression = parenthesizeExpressionForList(expression);
-        node.caseBlock = caseBlock;
-        return node;
-    }
-    ts.createSwitch = createSwitch;
-    function updateSwitch(node, expression, caseBlock) {
-        if (node.expression !== expression || node.caseBlock !== caseBlock) {
-            return updateNode(createSwitch(expression, caseBlock, node), node);
+        function parsePrimaryExpression() {
+            switch (token()) {
+                case 8 /* NumericLiteral */:
+                case 9 /* StringLiteral */:
+                case 13 /* NoSubstitutionTemplateLiteral */:
+                    return parseLiteralNode();
+                case 99 /* ThisKeyword */:
+                case 97 /* SuperKeyword */:
+                case 95 /* NullKeyword */:
+                case 101 /* TrueKeyword */:
+                case 86 /* FalseKeyword */:
+                    return parseTokenNode();
+                case 19 /* OpenParenToken */:
+                    return parseParenthesizedExpression();
+                case 21 /* OpenBracketToken */:
+                    return parseArrayLiteralExpression();
+                case 17 /* OpenBraceToken */:
+                    return parseObjectLiteralExpression();
+                case 120 /* AsyncKeyword */:
+                    // Async arrow functions are parsed earlier in parseAssignmentExpressionOrHigher.
+                    // If we encounter `async [no LineTerminator here] function` then this is an async
+                    // function; otherwise, its an identifier.
+                    if (!lookAhead(nextTokenIsFunctionKeywordOnSameLine)) {
+                        break;
+                    }
+                    return parseFunctionExpression();
+                case 75 /* ClassKeyword */:
+                    return parseClassExpression();
+                case 89 /* FunctionKeyword */:
+                    return parseFunctionExpression();
+                case 94 /* NewKeyword */:
+                    return parseNewExpression();
+                case 41 /* SlashToken */:
+                case 63 /* SlashEqualsToken */:
+                    if (reScanSlashToken() === 12 /* RegularExpressionLiteral */) {
+                        return parseLiteralNode();
+                    }
+                    break;
+                case 14 /* TemplateHead */:
+                    return parseTemplateExpression();
+            }
+            return parseIdentifier(ts.Diagnostics.Expression_expected);
         }
-        return node;
-    }
-    ts.updateSwitch = updateSwitch;
-    function createLabel(label, statement, location) {
-        var node = createNode(214 /* LabeledStatement */, location);
-        node.label = typeof label === "string" ? createIdentifier(label) : label;
-        node.statement = statement;
-        return node;
-    }
-    ts.createLabel = createLabel;
-    function updateLabel(node, label, statement) {
-        if (node.label !== label || node.statement !== statement) {
-            return updateNode(createLabel(label, statement, node), node);
+        function parseParenthesizedExpression() {
+            var node = createNode(185 /* ParenthesizedExpression */);
+            parseExpected(19 /* OpenParenToken */);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(20 /* CloseParenToken */);
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateLabel = updateLabel;
-    function createThrow(expression, location) {
-        var node = createNode(215 /* ThrowStatement */, location);
-        node.expression = expression;
-        return node;
-    }
-    ts.createThrow = createThrow;
-    function updateThrow(node, expression) {
-        if (node.expression !== expression) {
-            return updateNode(createThrow(expression, node), node);
+        function parseSpreadElement() {
+            var node = createNode(198 /* SpreadElement */);
+            parseExpected(24 /* DotDotDotToken */);
+            node.expression = parseAssignmentExpressionOrHigher();
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateThrow = updateThrow;
-    function createTry(tryBlock, catchClause, finallyBlock, location) {
-        var node = createNode(216 /* TryStatement */, location);
-        node.tryBlock = tryBlock;
-        node.catchClause = catchClause;
-        node.finallyBlock = finallyBlock;
-        return node;
-    }
-    ts.createTry = createTry;
-    function updateTry(node, tryBlock, catchClause, finallyBlock) {
-        if (node.tryBlock !== tryBlock || node.catchClause !== catchClause || node.finallyBlock !== finallyBlock) {
-            return updateNode(createTry(tryBlock, catchClause, finallyBlock, node), node);
+        function parseArgumentOrArrayLiteralElement() {
+            return token() === 24 /* DotDotDotToken */ ? parseSpreadElement() :
+                token() === 26 /* CommaToken */ ? createNode(200 /* OmittedExpression */) :
+                    parseAssignmentExpressionOrHigher();
         }
-        return node;
-    }
-    ts.updateTry = updateTry;
-    function createCaseBlock(clauses, location) {
-        var node = createNode(227 /* CaseBlock */, location);
-        node.clauses = createNodeArray(clauses);
-        return node;
-    }
-    ts.createCaseBlock = createCaseBlock;
-    function updateCaseBlock(node, clauses) {
-        if (node.clauses !== clauses) {
-            return updateNode(createCaseBlock(clauses, node), node);
+        function parseArgumentExpression() {
+            return doOutsideOfContext(disallowInAndDecoratorContext, parseArgumentOrArrayLiteralElement);
         }
-        return node;
-    }
-    ts.updateCaseBlock = updateCaseBlock;
-    function createFunctionDeclaration(decorators, modifiers, asteriskToken, name, typeParameters, parameters, type, body, location, flags) {
-        var node = createNode(220 /* FunctionDeclaration */, location, flags);
-        node.decorators = decorators ? createNodeArray(decorators) : undefined;
-        node.modifiers = modifiers ? createNodeArray(modifiers) : undefined;
-        node.asteriskToken = asteriskToken;
-        node.name = typeof name === "string" ? createIdentifier(name) : name;
-        node.typeParameters = typeParameters ? createNodeArray(typeParameters) : undefined;
-        node.parameters = createNodeArray(parameters);
-        node.type = type;
-        node.body = body;
-        return node;
-    }
-    ts.createFunctionDeclaration = createFunctionDeclaration;
-    function updateFunctionDeclaration(node, decorators, modifiers, name, typeParameters, parameters, type, body) {
-        if (node.decorators !== decorators || node.modifiers !== modifiers || node.name !== name || node.typeParameters !== typeParameters || node.parameters !== parameters || node.type !== type || node.body !== body) {
-            return updateNode(createFunctionDeclaration(decorators, modifiers, node.asteriskToken, name, typeParameters, parameters, type, body, /*location*/ node, node.flags), node);
+        function parseArrayLiteralExpression() {
+            var node = createNode(177 /* ArrayLiteralExpression */);
+            parseExpected(21 /* OpenBracketToken */);
+            if (scanner.hasPrecedingLineBreak()) {
+                node.multiLine = true;
+            }
+            node.elements = parseDelimitedList(15 /* ArrayLiteralMembers */, parseArgumentOrArrayLiteralElement);
+            parseExpected(22 /* CloseBracketToken */);
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateFunctionDeclaration = updateFunctionDeclaration;
-    function createClassDeclaration(decorators, modifiers, name, typeParameters, heritageClauses, members, location) {
-        var node = createNode(221 /* ClassDeclaration */, location);
-        node.decorators = decorators ? createNodeArray(decorators) : undefined;
-        node.modifiers = modifiers ? createNodeArray(modifiers) : undefined;
-        node.name = name;
-        node.typeParameters = typeParameters ? createNodeArray(typeParameters) : undefined;
-        node.heritageClauses = createNodeArray(heritageClauses);
-        node.members = createNodeArray(members);
-        return node;
-    }
-    ts.createClassDeclaration = createClassDeclaration;
-    function updateClassDeclaration(node, decorators, modifiers, name, typeParameters, heritageClauses, members) {
-        if (node.decorators !== decorators || node.modifiers !== modifiers || node.name !== name || node.typeParameters !== typeParameters || node.heritageClauses !== heritageClauses || node.members !== members) {
-            return updateNode(createClassDeclaration(decorators, modifiers, name, typeParameters, heritageClauses, members, node), node);
+        function tryParseAccessorDeclaration(fullStart, decorators, modifiers) {
+            if (parseContextualModifier(125 /* GetKeyword */)) {
+                return parseAccessorDeclaration(153 /* GetAccessor */, fullStart, decorators, modifiers);
+            }
+            else if (parseContextualModifier(135 /* SetKeyword */)) {
+                return parseAccessorDeclaration(154 /* SetAccessor */, fullStart, decorators, modifiers);
+            }
+            return undefined;
         }
-        return node;
-    }
-    ts.updateClassDeclaration = updateClassDeclaration;
-    function createImportDeclaration(decorators, modifiers, importClause, moduleSpecifier, location) {
-        var node = createNode(230 /* ImportDeclaration */, location);
-        node.decorators = decorators ? createNodeArray(decorators) : undefined;
-        node.modifiers = modifiers ? createNodeArray(modifiers) : undefined;
-        node.importClause = importClause;
-        node.moduleSpecifier = moduleSpecifier;
-        return node;
-    }
-    ts.createImportDeclaration = createImportDeclaration;
-    function updateImportDeclaration(node, decorators, modifiers, importClause, moduleSpecifier) {
-        if (node.decorators !== decorators || node.modifiers !== modifiers || node.importClause !== importClause || node.moduleSpecifier !== moduleSpecifier) {
-            return updateNode(createImportDeclaration(decorators, modifiers, importClause, moduleSpecifier, node), node);
+        function parseObjectLiteralElement() {
+            var fullStart = scanner.getStartPos();
+            var dotDotDotToken = parseOptionalToken(24 /* DotDotDotToken */);
+            if (dotDotDotToken) {
+                var spreadElement = createNode(263 /* SpreadAssignment */, fullStart);
+                spreadElement.expression = parseAssignmentExpressionOrHigher();
+                return addJSDocComment(finishNode(spreadElement));
+            }
+            var decorators = parseDecorators();
+            var modifiers = parseModifiers();
+            var accessor = tryParseAccessorDeclaration(fullStart, decorators, modifiers);
+            if (accessor) {
+                return accessor;
+            }
+            var asteriskToken = parseOptionalToken(39 /* AsteriskToken */);
+            var tokenIsIdentifier = isIdentifier();
+            var propertyName = parsePropertyName();
+            // Disallowing of optional property assignments happens in the grammar checker.
+            var questionToken = parseOptionalToken(55 /* QuestionToken */);
+            if (asteriskToken || token() === 19 /* OpenParenToken */ || token() === 27 /* LessThanToken */) {
+                return parseMethodDeclaration(fullStart, decorators, modifiers, asteriskToken, propertyName, questionToken);
+            }
+            // check if it is short-hand property assignment or normal property assignment
+            // NOTE: if token is EqualsToken it is interpreted as CoverInitializedName production
+            // CoverInitializedName[Yield] :
+            //     IdentifierReference[?Yield] Initializer[In, ?Yield]
+            // this is necessary because ObjectLiteral productions are also used to cover grammar for ObjectAssignmentPattern
+            var isShorthandPropertyAssignment = tokenIsIdentifier && (token() === 26 /* CommaToken */ || token() === 18 /* CloseBraceToken */ || token() === 58 /* EqualsToken */);
+            if (isShorthandPropertyAssignment) {
+                var shorthandDeclaration = createNode(262 /* ShorthandPropertyAssignment */, fullStart);
+                shorthandDeclaration.name = propertyName;
+                shorthandDeclaration.questionToken = questionToken;
+                var equalsToken = parseOptionalToken(58 /* EqualsToken */);
+                if (equalsToken) {
+                    shorthandDeclaration.equalsToken = equalsToken;
+                    shorthandDeclaration.objectAssignmentInitializer = allowInAnd(parseAssignmentExpressionOrHigher);
+                }
+                return addJSDocComment(finishNode(shorthandDeclaration));
+            }
+            else {
+                var propertyAssignment = createNode(261 /* PropertyAssignment */, fullStart);
+                propertyAssignment.modifiers = modifiers;
+                propertyAssignment.name = propertyName;
+                propertyAssignment.questionToken = questionToken;
+                parseExpected(56 /* ColonToken */);
+                propertyAssignment.initializer = allowInAnd(parseAssignmentExpressionOrHigher);
+                return addJSDocComment(finishNode(propertyAssignment));
+            }
         }
-        return node;
-    }
-    ts.updateImportDeclaration = updateImportDeclaration;
-    function createImportClause(name, namedBindings, location) {
-        var node = createNode(231 /* ImportClause */, location);
-        node.name = name;
-        node.namedBindings = namedBindings;
-        return node;
-    }
-    ts.createImportClause = createImportClause;
-    function updateImportClause(node, name, namedBindings) {
-        if (node.name !== name || node.namedBindings !== namedBindings) {
-            return updateNode(createImportClause(name, namedBindings, node), node);
+        function parseObjectLiteralExpression() {
+            var node = createNode(178 /* ObjectLiteralExpression */);
+            parseExpected(17 /* OpenBraceToken */);
+            if (scanner.hasPrecedingLineBreak()) {
+                node.multiLine = true;
+            }
+            node.properties = parseDelimitedList(12 /* ObjectLiteralMembers */, parseObjectLiteralElement, /*considerSemicolonAsDelimiter*/ true);
+            parseExpected(18 /* CloseBraceToken */);
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateImportClause = updateImportClause;
-    function createNamespaceImport(name, location) {
-        var node = createNode(232 /* NamespaceImport */, location);
-        node.name = name;
-        return node;
-    }
-    ts.createNamespaceImport = createNamespaceImport;
-    function updateNamespaceImport(node, name) {
-        if (node.name !== name) {
-            return updateNode(createNamespaceImport(name, node), node);
+        function parseFunctionExpression() {
+            // GeneratorExpression:
+            //      function* BindingIdentifier [Yield][opt](FormalParameters[Yield]){ GeneratorBody }
+            //
+            // FunctionExpression:
+            //      function BindingIdentifier[opt](FormalParameters){ FunctionBody }
+            var saveDecoratorContext = inDecoratorContext();
+            if (saveDecoratorContext) {
+                setDecoratorContext(/*val*/ false);
+            }
+            var node = createNode(186 /* FunctionExpression */);
+            node.modifiers = parseModifiers();
+            parseExpected(89 /* FunctionKeyword */);
+            node.asteriskToken = parseOptionalToken(39 /* AsteriskToken */);
+            var isGenerator = !!node.asteriskToken;
+            var isAsync = !!(ts.getModifierFlags(node) & 256 /* Async */);
+            node.name =
+                isGenerator && isAsync ? doInYieldAndAwaitContext(parseOptionalIdentifier) :
+                    isGenerator ? doInYieldContext(parseOptionalIdentifier) :
+                        isAsync ? doInAwaitContext(parseOptionalIdentifier) :
+                            parseOptionalIdentifier();
+            fillSignature(56 /* ColonToken */, /*yieldContext*/ isGenerator, /*awaitContext*/ isAsync, /*requireCompleteParameterList*/ false, node);
+            node.body = parseFunctionBlock(/*allowYield*/ isGenerator, /*allowAwait*/ isAsync, /*ignoreMissingOpenBrace*/ false);
+            if (saveDecoratorContext) {
+                setDecoratorContext(/*val*/ true);
+            }
+            return addJSDocComment(finishNode(node));
         }
-        return node;
-    }
-    ts.updateNamespaceImport = updateNamespaceImport;
-    function createNamedImports(elements, location) {
-        var node = createNode(233 /* NamedImports */, location);
-        node.elements = createNodeArray(elements);
-        return node;
-    }
-    ts.createNamedImports = createNamedImports;
-    function updateNamedImports(node, elements) {
-        if (node.elements !== elements) {
-            return updateNode(createNamedImports(elements, node), node);
+        function parseOptionalIdentifier() {
+            return isIdentifier() ? parseIdentifier() : undefined;
         }
-        return node;
-    }
-    ts.updateNamedImports = updateNamedImports;
-    function createImportSpecifier(propertyName, name, location) {
-        var node = createNode(234 /* ImportSpecifier */, location);
-        node.propertyName = propertyName;
-        node.name = name;
-        return node;
-    }
-    ts.createImportSpecifier = createImportSpecifier;
-    function updateImportSpecifier(node, propertyName, name) {
-        if (node.propertyName !== propertyName || node.name !== name) {
-            return updateNode(createImportSpecifier(propertyName, name, node), node);
+        function parseNewExpression() {
+            var fullStart = scanner.getStartPos();
+            parseExpected(94 /* NewKeyword */);
+            if (parseOptional(23 /* DotToken */)) {
+                var node_1 = createNode(204 /* MetaProperty */, fullStart);
+                node_1.keywordToken = 94 /* NewKeyword */;
+                node_1.name = parseIdentifierName();
+                return finishNode(node_1);
+            }
+            var node = createNode(182 /* NewExpression */, fullStart);
+            node.expression = parseMemberExpressionOrHigher();
+            node.typeArguments = tryParse(parseTypeArgumentsInExpression);
+            if (node.typeArguments || token() === 19 /* OpenParenToken */) {
+                node.arguments = parseArgumentList();
+            }
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateImportSpecifier = updateImportSpecifier;
-    function createExportAssignment(decorators, modifiers, isExportEquals, expression, location) {
-        var node = createNode(235 /* ExportAssignment */, location);
-        node.decorators = decorators ? createNodeArray(decorators) : undefined;
-        node.modifiers = modifiers ? createNodeArray(modifiers) : undefined;
-        node.isExportEquals = isExportEquals;
-        node.expression = expression;
-        return node;
-    }
-    ts.createExportAssignment = createExportAssignment;
-    function updateExportAssignment(node, decorators, modifiers, expression) {
-        if (node.decorators !== decorators || node.modifiers !== modifiers || node.expression !== expression) {
-            return updateNode(createExportAssignment(decorators, modifiers, node.isExportEquals, expression, node), node);
+        // STATEMENTS
+        function parseBlock(ignoreMissingOpenBrace, diagnosticMessage) {
+            var node = createNode(207 /* Block */);
+            if (parseExpected(17 /* OpenBraceToken */, diagnosticMessage) || ignoreMissingOpenBrace) {
+                if (scanner.hasPrecedingLineBreak()) {
+                    node.multiLine = true;
+                }
+                node.statements = parseList(1 /* BlockStatements */, parseStatement);
+                parseExpected(18 /* CloseBraceToken */);
+            }
+            else {
+                node.statements = createMissingList();
+            }
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateExportAssignment = updateExportAssignment;
-    function createExportDeclaration(decorators, modifiers, exportClause, moduleSpecifier, location) {
-        var node = createNode(236 /* ExportDeclaration */, location);
-        node.decorators = decorators ? createNodeArray(decorators) : undefined;
-        node.modifiers = modifiers ? createNodeArray(modifiers) : undefined;
-        node.exportClause = exportClause;
-        node.moduleSpecifier = moduleSpecifier;
-        return node;
-    }
-    ts.createExportDeclaration = createExportDeclaration;
-    function updateExportDeclaration(node, decorators, modifiers, exportClause, moduleSpecifier) {
-        if (node.decorators !== decorators || node.modifiers !== modifiers || node.exportClause !== exportClause || node.moduleSpecifier !== moduleSpecifier) {
-            return updateNode(createExportDeclaration(decorators, modifiers, exportClause, moduleSpecifier, node), node);
+        function parseFunctionBlock(allowYield, allowAwait, ignoreMissingOpenBrace, diagnosticMessage) {
+            var savedYieldContext = inYieldContext();
+            setYieldContext(allowYield);
+            var savedAwaitContext = inAwaitContext();
+            setAwaitContext(allowAwait);
+            // We may be in a [Decorator] context when parsing a function expression or
+            // arrow function. The body of the function is not in [Decorator] context.
+            var saveDecoratorContext = inDecoratorContext();
+            if (saveDecoratorContext) {
+                setDecoratorContext(/*val*/ false);
+            }
+            var block = parseBlock(ignoreMissingOpenBrace, diagnosticMessage);
+            if (saveDecoratorContext) {
+                setDecoratorContext(/*val*/ true);
+            }
+            setYieldContext(savedYieldContext);
+            setAwaitContext(savedAwaitContext);
+            return block;
         }
-        return node;
-    }
-    ts.updateExportDeclaration = updateExportDeclaration;
-    function createNamedExports(elements, location) {
-        var node = createNode(237 /* NamedExports */, location);
-        node.elements = createNodeArray(elements);
-        return node;
-    }
-    ts.createNamedExports = createNamedExports;
-    function updateNamedExports(node, elements) {
-        if (node.elements !== elements) {
-            return updateNode(createNamedExports(elements, node), node);
+        function parseEmptyStatement() {
+            var node = createNode(209 /* EmptyStatement */);
+            parseExpected(25 /* SemicolonToken */);
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateNamedExports = updateNamedExports;
-    function createExportSpecifier(name, propertyName, location) {
-        var node = createNode(238 /* ExportSpecifier */, location);
-        node.name = typeof name === "string" ? createIdentifier(name) : name;
-        node.propertyName = typeof propertyName === "string" ? createIdentifier(propertyName) : propertyName;
-        return node;
-    }
-    ts.createExportSpecifier = createExportSpecifier;
-    function updateExportSpecifier(node, name, propertyName) {
-        if (node.name !== name || node.propertyName !== propertyName) {
-            return updateNode(createExportSpecifier(name, propertyName, node), node);
+        function parseIfStatement() {
+            var node = createNode(211 /* IfStatement */);
+            parseExpected(90 /* IfKeyword */);
+            parseExpected(19 /* OpenParenToken */);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(20 /* CloseParenToken */);
+            node.thenStatement = parseStatement();
+            node.elseStatement = parseOptional(82 /* ElseKeyword */) ? parseStatement() : undefined;
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateExportSpecifier = updateExportSpecifier;
-    // JSX
-    function createJsxElement(openingElement, children, closingElement, location) {
-        var node = createNode(241 /* JsxElement */, location);
-        node.openingElement = openingElement;
-        node.children = createNodeArray(children);
-        node.closingElement = closingElement;
-        return node;
-    }
-    ts.createJsxElement = createJsxElement;
-    function updateJsxElement(node, openingElement, children, closingElement) {
-        if (node.openingElement !== openingElement || node.children !== children || node.closingElement !== closingElement) {
-            return updateNode(createJsxElement(openingElement, children, closingElement, node), node);
+        function parseDoStatement() {
+            var node = createNode(212 /* DoStatement */);
+            parseExpected(81 /* DoKeyword */);
+            node.statement = parseStatement();
+            parseExpected(106 /* WhileKeyword */);
+            parseExpected(19 /* OpenParenToken */);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(20 /* CloseParenToken */);
+            // From: https://mail.mozilla.org/pipermail/es-discuss/2011-August/016188.html
+            // 157 min --- All allen at wirfs-brock.com CONF --- "do{;}while(false)false" prohibited in
+            // spec but allowed in consensus reality. Approved -- this is the de-facto standard whereby
+            //  do;while(0)x will have a semicolon inserted before x.
+            parseOptional(25 /* SemicolonToken */);
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateJsxElement = updateJsxElement;
-    function createJsxSelfClosingElement(tagName, attributes, location) {
-        var node = createNode(242 /* JsxSelfClosingElement */, location);
-        node.tagName = tagName;
-        node.attributes = createNodeArray(attributes);
-        return node;
-    }
-    ts.createJsxSelfClosingElement = createJsxSelfClosingElement;
-    function updateJsxSelfClosingElement(node, tagName, attributes) {
-        if (node.tagName !== tagName || node.attributes !== attributes) {
-            return updateNode(createJsxSelfClosingElement(tagName, attributes, node), node);
+        function parseWhileStatement() {
+            var node = createNode(213 /* WhileStatement */);
+            parseExpected(106 /* WhileKeyword */);
+            parseExpected(19 /* OpenParenToken */);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(20 /* CloseParenToken */);
+            node.statement = parseStatement();
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateJsxSelfClosingElement = updateJsxSelfClosingElement;
-    function createJsxOpeningElement(tagName, attributes, location) {
-        var node = createNode(243 /* JsxOpeningElement */, location);
-        node.tagName = tagName;
-        node.attributes = createNodeArray(attributes);
-        return node;
-    }
-    ts.createJsxOpeningElement = createJsxOpeningElement;
-    function updateJsxOpeningElement(node, tagName, attributes) {
-        if (node.tagName !== tagName || node.attributes !== attributes) {
-            return updateNode(createJsxOpeningElement(tagName, attributes, node), node);
+        function parseForOrForInOrForOfStatement() {
+            var pos = getNodePos();
+            parseExpected(88 /* ForKeyword */);
+            var awaitToken = parseOptionalToken(121 /* AwaitKeyword */);
+            parseExpected(19 /* OpenParenToken */);
+            var initializer = undefined;
+            if (token() !== 25 /* SemicolonToken */) {
+                if (token() === 104 /* VarKeyword */ || token() === 110 /* LetKeyword */ || token() === 76 /* ConstKeyword */) {
+                    initializer = parseVariableDeclarationList(/*inForStatementInitializer*/ true);
+                }
+                else {
+                    initializer = disallowInAnd(parseExpression);
+                }
+            }
+            var forOrForInOrForOfStatement;
+            if (awaitToken ? parseExpected(142 /* OfKeyword */) : parseOptional(142 /* OfKeyword */)) {
+                var forOfStatement = createNode(216 /* ForOfStatement */, pos);
+                forOfStatement.awaitModifier = awaitToken;
+                forOfStatement.initializer = initializer;
+                forOfStatement.expression = allowInAnd(parseAssignmentExpressionOrHigher);
+                parseExpected(20 /* CloseParenToken */);
+                forOrForInOrForOfStatement = forOfStatement;
+            }
+            else if (parseOptional(92 /* InKeyword */)) {
+                var forInStatement = createNode(215 /* ForInStatement */, pos);
+                forInStatement.initializer = initializer;
+                forInStatement.expression = allowInAnd(parseExpression);
+                parseExpected(20 /* CloseParenToken */);
+                forOrForInOrForOfStatement = forInStatement;
+            }
+            else {
+                var forStatement = createNode(214 /* ForStatement */, pos);
+                forStatement.initializer = initializer;
+                parseExpected(25 /* SemicolonToken */);
+                if (token() !== 25 /* SemicolonToken */ && token() !== 20 /* CloseParenToken */) {
+                    forStatement.condition = allowInAnd(parseExpression);
+                }
+                parseExpected(25 /* SemicolonToken */);
+                if (token() !== 20 /* CloseParenToken */) {
+                    forStatement.incrementor = allowInAnd(parseExpression);
+                }
+                parseExpected(20 /* CloseParenToken */);
+                forOrForInOrForOfStatement = forStatement;
+            }
+            forOrForInOrForOfStatement.statement = parseStatement();
+            return finishNode(forOrForInOrForOfStatement);
         }
-        return node;
-    }
-    ts.updateJsxOpeningElement = updateJsxOpeningElement;
-    function createJsxClosingElement(tagName, location) {
-        var node = createNode(245 /* JsxClosingElement */, location);
-        node.tagName = tagName;
-        return node;
-    }
-    ts.createJsxClosingElement = createJsxClosingElement;
-    function updateJsxClosingElement(node, tagName) {
-        if (node.tagName !== tagName) {
-            return updateNode(createJsxClosingElement(tagName, node), node);
+        function parseBreakOrContinueStatement(kind) {
+            var node = createNode(kind);
+            parseExpected(kind === 218 /* BreakStatement */ ? 72 /* BreakKeyword */ : 77 /* ContinueKeyword */);
+            if (!canParseSemicolon()) {
+                node.label = parseIdentifier();
+            }
+            parseSemicolon();
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateJsxClosingElement = updateJsxClosingElement;
-    function createJsxAttribute(name, initializer, location) {
-        var node = createNode(246 /* JsxAttribute */, location);
-        node.name = name;
-        node.initializer = initializer;
-        return node;
-    }
-    ts.createJsxAttribute = createJsxAttribute;
-    function updateJsxAttribute(node, name, initializer) {
-        if (node.name !== name || node.initializer !== initializer) {
-            return updateNode(createJsxAttribute(name, initializer, node), node);
+        function parseReturnStatement() {
+            var node = createNode(219 /* ReturnStatement */);
+            parseExpected(96 /* ReturnKeyword */);
+            if (!canParseSemicolon()) {
+                node.expression = allowInAnd(parseExpression);
+            }
+            parseSemicolon();
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateJsxAttribute = updateJsxAttribute;
-    function createJsxSpreadAttribute(expression, location) {
-        var node = createNode(247 /* JsxSpreadAttribute */, location);
-        node.expression = expression;
-        return node;
-    }
-    ts.createJsxSpreadAttribute = createJsxSpreadAttribute;
-    function updateJsxSpreadAttribute(node, expression) {
-        if (node.expression !== expression) {
-            return updateNode(createJsxSpreadAttribute(expression, node), node);
+        function parseWithStatement() {
+            var node = createNode(220 /* WithStatement */);
+            parseExpected(107 /* WithKeyword */);
+            parseExpected(19 /* OpenParenToken */);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(20 /* CloseParenToken */);
+            node.statement = parseStatement();
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateJsxSpreadAttribute = updateJsxSpreadAttribute;
-    function createJsxExpression(expression, location) {
-        var node = createNode(248 /* JsxExpression */, location);
-        node.expression = expression;
-        return node;
-    }
-    ts.createJsxExpression = createJsxExpression;
-    function updateJsxExpression(node, expression) {
-        if (node.expression !== expression) {
-            return updateNode(createJsxExpression(expression, node), node);
+        function parseCaseClause() {
+            var node = createNode(257 /* CaseClause */);
+            parseExpected(73 /* CaseKeyword */);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(56 /* ColonToken */);
+            node.statements = parseList(3 /* SwitchClauseStatements */, parseStatement);
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateJsxExpression = updateJsxExpression;
-    // Clauses
-    function createHeritageClause(token, types, location) {
-        var node = createNode(251 /* HeritageClause */, location);
-        node.token = token;
-        node.types = createNodeArray(types);
-        return node;
-    }
-    ts.createHeritageClause = createHeritageClause;
-    function updateHeritageClause(node, types) {
-        if (node.types !== types) {
-            return updateNode(createHeritageClause(node.token, types, node), node);
+        function parseDefaultClause() {
+            var node = createNode(258 /* DefaultClause */);
+            parseExpected(79 /* DefaultKeyword */);
+            parseExpected(56 /* ColonToken */);
+            node.statements = parseList(3 /* SwitchClauseStatements */, parseStatement);
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateHeritageClause = updateHeritageClause;
-    function createCaseClause(expression, statements, location) {
-        var node = createNode(249 /* CaseClause */, location);
-        node.expression = parenthesizeExpressionForList(expression);
-        node.statements = createNodeArray(statements);
-        return node;
-    }
-    ts.createCaseClause = createCaseClause;
-    function updateCaseClause(node, expression, statements) {
-        if (node.expression !== expression || node.statements !== statements) {
-            return updateNode(createCaseClause(expression, statements, node), node);
+        function parseCaseOrDefaultClause() {
+            return token() === 73 /* CaseKeyword */ ? parseCaseClause() : parseDefaultClause();
         }
-        return node;
-    }
-    ts.updateCaseClause = updateCaseClause;
-    function createDefaultClause(statements, location) {
-        var node = createNode(250 /* DefaultClause */, location);
-        node.statements = createNodeArray(statements);
-        return node;
-    }
-    ts.createDefaultClause = createDefaultClause;
-    function updateDefaultClause(node, statements) {
-        if (node.statements !== statements) {
-            return updateNode(createDefaultClause(statements, node), node);
+        function parseSwitchStatement() {
+            var node = createNode(221 /* SwitchStatement */);
+            parseExpected(98 /* SwitchKeyword */);
+            parseExpected(19 /* OpenParenToken */);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(20 /* CloseParenToken */);
+            var caseBlock = createNode(235 /* CaseBlock */, scanner.getStartPos());
+            parseExpected(17 /* OpenBraceToken */);
+            caseBlock.clauses = parseList(2 /* SwitchClauses */, parseCaseOrDefaultClause);
+            parseExpected(18 /* CloseBraceToken */);
+            node.caseBlock = finishNode(caseBlock);
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateDefaultClause = updateDefaultClause;
-    function createCatchClause(variableDeclaration, block, location) {
-        var node = createNode(252 /* CatchClause */, location);
-        node.variableDeclaration = typeof variableDeclaration === "string" ? createVariableDeclaration(variableDeclaration) : variableDeclaration;
-        node.block = block;
-        return node;
-    }
-    ts.createCatchClause = createCatchClause;
-    function updateCatchClause(node, variableDeclaration, block) {
-        if (node.variableDeclaration !== variableDeclaration || node.block !== block) {
-            return updateNode(createCatchClause(variableDeclaration, block, node), node);
+        function parseThrowStatement() {
+            // ThrowStatement[Yield] :
+            //      throw [no LineTerminator here]Expression[In, ?Yield];
+            // Because of automatic semicolon insertion, we need to report error if this
+            // throw could be terminated with a semicolon.  Note: we can't call 'parseExpression'
+            // directly as that might consume an expression on the following line.
+            // We just return 'undefined' in that case.  The actual error will be reported in the
+            // grammar walker.
+            var node = createNode(223 /* ThrowStatement */);
+            parseExpected(100 /* ThrowKeyword */);
+            node.expression = scanner.hasPrecedingLineBreak() ? undefined : allowInAnd(parseExpression);
+            parseSemicolon();
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateCatchClause = updateCatchClause;
-    // Property assignments
-    function createPropertyAssignment(name, initializer, location) {
-        var node = createNode(253 /* PropertyAssignment */, location);
-        node.name = typeof name === "string" ? createIdentifier(name) : name;
-        node.questionToken = undefined;
-        node.initializer = initializer !== undefined ? parenthesizeExpressionForList(initializer) : undefined;
-        return node;
-    }
-    ts.createPropertyAssignment = createPropertyAssignment;
-    function updatePropertyAssignment(node, name, initializer) {
-        if (node.name !== name || node.initializer !== initializer) {
-            return updateNode(createPropertyAssignment(name, initializer, node), node);
+        // TODO: Review for error recovery
+        function parseTryStatement() {
+            var node = createNode(224 /* TryStatement */);
+            parseExpected(102 /* TryKeyword */);
+            node.tryBlock = parseBlock(/*ignoreMissingOpenBrace*/ false);
+            node.catchClause = token() === 74 /* CatchKeyword */ ? parseCatchClause() : undefined;
+            // If we don't have a catch clause, then we must have a finally clause.  Try to parse
+            // one out no matter what.
+            if (!node.catchClause || token() === 87 /* FinallyKeyword */) {
+                parseExpected(87 /* FinallyKeyword */);
+                node.finallyBlock = parseBlock(/*ignoreMissingOpenBrace*/ false);
+            }
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updatePropertyAssignment = updatePropertyAssignment;
-    function createShorthandPropertyAssignment(name, objectAssignmentInitializer, location) {
-        var node = createNode(254 /* ShorthandPropertyAssignment */, location);
-        node.name = typeof name === "string" ? createIdentifier(name) : name;
-        node.objectAssignmentInitializer = objectAssignmentInitializer !== undefined ? parenthesizeExpressionForList(objectAssignmentInitializer) : undefined;
-        return node;
-    }
-    ts.createShorthandPropertyAssignment = createShorthandPropertyAssignment;
-    function updateShorthandPropertyAssignment(node, name, objectAssignmentInitializer) {
-        if (node.name !== name || node.objectAssignmentInitializer !== objectAssignmentInitializer) {
-            return updateNode(createShorthandPropertyAssignment(name, objectAssignmentInitializer, node), node);
+        function parseCatchClause() {
+            var result = createNode(260 /* CatchClause */);
+            parseExpected(74 /* CatchKeyword */);
+            if (parseExpected(19 /* OpenParenToken */)) {
+                result.variableDeclaration = parseVariableDeclaration();
+            }
+            parseExpected(20 /* CloseParenToken */);
+            result.block = parseBlock(/*ignoreMissingOpenBrace*/ false);
+            return finishNode(result);
         }
-        return node;
-    }
-    ts.updateShorthandPropertyAssignment = updateShorthandPropertyAssignment;
-    // Top-level nodes
-    function updateSourceFileNode(node, statements) {
-        if (node.statements !== statements) {
-            var updated = createNode(256 /* SourceFile */, /*location*/ node, node.flags);
-            updated.statements = createNodeArray(statements);
-            updated.endOfFileToken = node.endOfFileToken;
-            updated.fileName = node.fileName;
-            updated.path = node.path;
-            updated.text = node.text;
-            if (node.amdDependencies !== undefined)
-                updated.amdDependencies = node.amdDependencies;
-            if (node.moduleName !== undefined)
-                updated.moduleName = node.moduleName;
-            if (node.referencedFiles !== undefined)
-                updated.referencedFiles = node.referencedFiles;
-            if (node.typeReferenceDirectives !== undefined)
-                updated.typeReferenceDirectives = node.typeReferenceDirectives;
-            if (node.languageVariant !== undefined)
-                updated.languageVariant = node.languageVariant;
-            if (node.isDeclarationFile !== undefined)
-                updated.isDeclarationFile = node.isDeclarationFile;
-            if (node.renamedDependencies !== undefined)
-                updated.renamedDependencies = node.renamedDependencies;
-            if (node.hasNoDefaultLib !== undefined)
-                updated.hasNoDefaultLib = node.hasNoDefaultLib;
-            if (node.languageVersion !== undefined)
-                updated.languageVersion = node.languageVersion;
-            if (node.scriptKind !== undefined)
-                updated.scriptKind = node.scriptKind;
-            if (node.externalModuleIndicator !== undefined)
-                updated.externalModuleIndicator = node.externalModuleIndicator;
-            if (node.commonJsModuleIndicator !== undefined)
-                updated.commonJsModuleIndicator = node.commonJsModuleIndicator;
-            if (node.identifiers !== undefined)
-                updated.identifiers = node.identifiers;
-            if (node.nodeCount !== undefined)
-                updated.nodeCount = node.nodeCount;
-            if (node.identifierCount !== undefined)
-                updated.identifierCount = node.identifierCount;
-            if (node.symbolCount !== undefined)
-                updated.symbolCount = node.symbolCount;
-            if (node.parseDiagnostics !== undefined)
-                updated.parseDiagnostics = node.parseDiagnostics;
-            if (node.bindDiagnostics !== undefined)
-                updated.bindDiagnostics = node.bindDiagnostics;
-            if (node.lineMap !== undefined)
-                updated.lineMap = node.lineMap;
-            if (node.classifiableNames !== undefined)
-                updated.classifiableNames = node.classifiableNames;
-            if (node.resolvedModules !== undefined)
-                updated.resolvedModules = node.resolvedModules;
-            if (node.resolvedTypeReferenceDirectiveNames !== undefined)
-                updated.resolvedTypeReferenceDirectiveNames = node.resolvedTypeReferenceDirectiveNames;
-            if (node.imports !== undefined)
-                updated.imports = node.imports;
-            if (node.moduleAugmentations !== undefined)
-                updated.moduleAugmentations = node.moduleAugmentations;
-            if (node.externalHelpersModuleName !== undefined)
-                updated.externalHelpersModuleName = node.externalHelpersModuleName;
-            return updateNode(updated, node);
+        function parseDebuggerStatement() {
+            var node = createNode(225 /* DebuggerStatement */);
+            parseExpected(78 /* DebuggerKeyword */);
+            parseSemicolon();
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateSourceFileNode = updateSourceFileNode;
-    // Transformation nodes
-    /**
-     * Creates a synthetic statement to act as a placeholder for a not-emitted statement in
-     * order to preserve comments.
-     *
-     * @param original The original statement.
-     */
-    function createNotEmittedStatement(original) {
-        var node = createNode(287 /* NotEmittedStatement */, /*location*/ original);
-        node.original = original;
-        return node;
-    }
-    ts.createNotEmittedStatement = createNotEmittedStatement;
-    /**
-     * Creates a synthetic expression to act as a placeholder for a not-emitted expression in
-     * order to preserve comments or sourcemap positions.
-     *
-     * @param expression The inner expression to emit.
-     * @param original The original outer expression.
-     * @param location The location for the expression. Defaults to the positions from "original" if provided.
-     */
-    function createPartiallyEmittedExpression(expression, original, location) {
-        var node = createNode(288 /* PartiallyEmittedExpression */, /*location*/ location || original);
-        node.expression = expression;
-        node.original = original;
-        return node;
-    }
-    ts.createPartiallyEmittedExpression = createPartiallyEmittedExpression;
-    function updatePartiallyEmittedExpression(node, expression) {
-        if (node.expression !== expression) {
-            return updateNode(createPartiallyEmittedExpression(expression, node.original, node), node);
+        function parseExpressionOrLabeledStatement() {
+            // Avoiding having to do the lookahead for a labeled statement by just trying to parse
+            // out an expression, seeing if it is identifier and then seeing if it is followed by
+            // a colon.
+            var fullStart = scanner.getStartPos();
+            var expression = allowInAnd(parseExpression);
+            if (expression.kind === 71 /* Identifier */ && parseOptional(56 /* ColonToken */)) {
+                var labeledStatement = createNode(222 /* LabeledStatement */, fullStart);
+                labeledStatement.label = expression;
+                labeledStatement.statement = parseStatement();
+                return addJSDocComment(finishNode(labeledStatement));
+            }
+            else {
+                var expressionStatement = createNode(210 /* ExpressionStatement */, fullStart);
+                expressionStatement.expression = expression;
+                parseSemicolon();
+                return addJSDocComment(finishNode(expressionStatement));
+            }
         }
-        return node;
-    }
-    ts.updatePartiallyEmittedExpression = updatePartiallyEmittedExpression;
-    // Compound nodes
-    function createComma(left, right) {
-        return createBinary(left, 24 /* CommaToken */, right);
-    }
-    ts.createComma = createComma;
-    function createLessThan(left, right, location) {
-        return createBinary(left, 25 /* LessThanToken */, right, location);
-    }
-    ts.createLessThan = createLessThan;
-    function createAssignment(left, right, location) {
-        return createBinary(left, 56 /* EqualsToken */, right, location);
-    }
-    ts.createAssignment = createAssignment;
-    function createStrictEquality(left, right) {
-        return createBinary(left, 32 /* EqualsEqualsEqualsToken */, right);
-    }
-    ts.createStrictEquality = createStrictEquality;
-    function createStrictInequality(left, right) {
-        return createBinary(left, 33 /* ExclamationEqualsEqualsToken */, right);
-    }
-    ts.createStrictInequality = createStrictInequality;
-    function createAdd(left, right) {
-        return createBinary(left, 35 /* PlusToken */, right);
-    }
-    ts.createAdd = createAdd;
-    function createSubtract(left, right) {
-        return createBinary(left, 36 /* MinusToken */, right);
-    }
-    ts.createSubtract = createSubtract;
-    function createPostfixIncrement(operand, location) {
-        return createPostfix(operand, 41 /* PlusPlusToken */, location);
-    }
-    ts.createPostfixIncrement = createPostfixIncrement;
-    function createLogicalAnd(left, right) {
-        return createBinary(left, 51 /* AmpersandAmpersandToken */, right);
-    }
-    ts.createLogicalAnd = createLogicalAnd;
-    function createLogicalOr(left, right) {
-        return createBinary(left, 52 /* BarBarToken */, right);
-    }
-    ts.createLogicalOr = createLogicalOr;
-    function createLogicalNot(operand) {
-        return createPrefix(49 /* ExclamationToken */, operand);
-    }
-    ts.createLogicalNot = createLogicalNot;
-    function createVoidZero() {
-        return createVoid(createLiteral(0));
-    }
-    ts.createVoidZero = createVoidZero;
-    function createMemberAccessForPropertyName(target, memberName, location) {
-        if (ts.isComputedPropertyName(memberName)) {
-            return createElementAccess(target, memberName.expression, location);
+        function nextTokenIsIdentifierOrKeywordOnSameLine() {
+            nextToken();
+            return ts.tokenIsIdentifierOrKeyword(token()) && !scanner.hasPrecedingLineBreak();
         }
-        else {
-            var expression = ts.isIdentifier(memberName) ? createPropertyAccess(target, memberName, location) : createElementAccess(target, memberName, location);
-            (expression.emitNode || (expression.emitNode = {})).flags |= 2048 /* NoNestedSourceMaps */;
-            return expression;
+        function nextTokenIsClassKeywordOnSameLine() {
+            nextToken();
+            return token() === 75 /* ClassKeyword */ && !scanner.hasPrecedingLineBreak();
         }
-    }
-    ts.createMemberAccessForPropertyName = createMemberAccessForPropertyName;
-    function createRestParameter(name) {
-        return createParameterDeclaration(
-        /*decorators*/ undefined, 
-        /*modifiers*/ undefined, createSynthesizedNode(22 /* DotDotDotToken */), name, 
-        /*questionToken*/ undefined, 
-        /*type*/ undefined, 
-        /*initializer*/ undefined);
-    }
-    ts.createRestParameter = createRestParameter;
-    function createFunctionCall(func, thisArg, argumentsList, location) {
-        return createCall(createPropertyAccess(func, "call"), 
-        /*typeArguments*/ undefined, [
-            thisArg
-        ].concat(argumentsList), location);
-    }
-    ts.createFunctionCall = createFunctionCall;
-    function createFunctionApply(func, thisArg, argumentsExpression, location) {
-        return createCall(createPropertyAccess(func, "apply"), 
-        /*typeArguments*/ undefined, [
-            thisArg,
-            argumentsExpression
-        ], location);
-    }
-    ts.createFunctionApply = createFunctionApply;
-    function createArraySlice(array, start) {
-        var argumentsList = [];
-        if (start !== undefined) {
-            argumentsList.push(typeof start === "number" ? createLiteral(start) : start);
+        function nextTokenIsFunctionKeywordOnSameLine() {
+            nextToken();
+            return token() === 89 /* FunctionKeyword */ && !scanner.hasPrecedingLineBreak();
         }
-        return createCall(createPropertyAccess(array, "slice"), /*typeArguments*/ undefined, argumentsList);
-    }
-    ts.createArraySlice = createArraySlice;
-    function createArrayConcat(array, values) {
-        return createCall(createPropertyAccess(array, "concat"), 
-        /*typeArguments*/ undefined, values);
-    }
-    ts.createArrayConcat = createArrayConcat;
-    function createMathPow(left, right, location) {
-        return createCall(createPropertyAccess(createIdentifier("Math"), "pow"), 
-        /*typeArguments*/ undefined, [left, right], location);
-    }
-    ts.createMathPow = createMathPow;
-    function createReactNamespace(reactNamespace, parent) {
-        // To ensure the emit resolver can properly resolve the namespace, we need to
-        // treat this identifier as if it were a source tree node by clearing the `Synthesized`
-        // flag and setting a parent node.
-        var react = createIdentifier(reactNamespace || "React");
-        react.flags &= ~8 /* Synthesized */;
-        react.parent = parent;
-        return react;
-    }
-    function createReactCreateElement(reactNamespace, tagName, props, children, parentElement, location) {
-        var argumentsList = [tagName];
-        if (props) {
-            argumentsList.push(props);
+        function nextTokenIsIdentifierOrKeywordOrLiteralOnSameLine() {
+            nextToken();
+            return (ts.tokenIsIdentifierOrKeyword(token()) || token() === 8 /* NumericLiteral */ || token() === 9 /* StringLiteral */) && !scanner.hasPrecedingLineBreak();
         }
-        if (children && children.length > 0) {
-            if (!props) {
-                argumentsList.push(createNull());
-            }
-            if (children.length > 1) {
-                for (var _i = 0, children_1 = children; _i < children_1.length; _i++) {
-                    var child = children_1[_i];
-                    child.startsOnNewLine = true;
-                    argumentsList.push(child);
+        function isDeclaration() {
+            while (true) {
+                switch (token()) {
+                    case 104 /* VarKeyword */:
+                    case 110 /* LetKeyword */:
+                    case 76 /* ConstKeyword */:
+                    case 89 /* FunctionKeyword */:
+                    case 75 /* ClassKeyword */:
+                    case 83 /* EnumKeyword */:
+                        return true;
+                    // 'declare', 'module', 'namespace', 'interface'* and 'type' are all legal JavaScript identifiers;
+                    // however, an identifier cannot be followed by another identifier on the same line. This is what we
+                    // count on to parse out the respective declarations. For instance, we exploit this to say that
+                    //
+                    //    namespace n
+                    //
+                    // can be none other than the beginning of a namespace declaration, but need to respect that JavaScript sees
+                    //
+                    //    namespace
+                    //    n
+                    //
+                    // as the identifier 'namespace' on one line followed by the identifier 'n' on another.
+                    // We need to look one token ahead to see if it permissible to try parsing a declaration.
+                    //
+                    // *Note*: 'interface' is actually a strict mode reserved word. So while
+                    //
+                    //   "use strict"
+                    //   interface
+                    //   I {}
+                    //
+                    // could be legal, it would add complexity for very little gain.
+                    case 109 /* InterfaceKeyword */:
+                    case 138 /* TypeKeyword */:
+                        return nextTokenIsIdentifierOnSameLine();
+                    case 128 /* ModuleKeyword */:
+                    case 129 /* NamespaceKeyword */:
+                        return nextTokenIsIdentifierOrStringLiteralOnSameLine();
+                    case 117 /* AbstractKeyword */:
+                    case 120 /* AsyncKeyword */:
+                    case 124 /* DeclareKeyword */:
+                    case 112 /* PrivateKeyword */:
+                    case 113 /* ProtectedKeyword */:
+                    case 114 /* PublicKeyword */:
+                    case 131 /* ReadonlyKeyword */:
+                        nextToken();
+                        // ASI takes effect for this modifier.
+                        if (scanner.hasPrecedingLineBreak()) {
+                            return false;
+                        }
+                        continue;
+                    case 141 /* GlobalKeyword */:
+                        nextToken();
+                        return token() === 17 /* OpenBraceToken */ || token() === 71 /* Identifier */ || token() === 84 /* ExportKeyword */;
+                    case 91 /* ImportKeyword */:
+                        nextToken();
+                        return token() === 9 /* StringLiteral */ || token() === 39 /* AsteriskToken */ ||
+                            token() === 17 /* OpenBraceToken */ || ts.tokenIsIdentifierOrKeyword(token());
+                    case 84 /* ExportKeyword */:
+                        nextToken();
+                        if (token() === 58 /* EqualsToken */ || token() === 39 /* AsteriskToken */ ||
+                            token() === 17 /* OpenBraceToken */ || token() === 79 /* DefaultKeyword */ ||
+                            token() === 118 /* AsKeyword */) {
+                            return true;
+                        }
+                        continue;
+                    case 115 /* StaticKeyword */:
+                        nextToken();
+                        continue;
+                    default:
+                        return false;
                 }
             }
-            else {
-                argumentsList.push(children[0]);
-            }
         }
-        return createCall(createPropertyAccess(createReactNamespace(reactNamespace, parentElement), "createElement"), 
-        /*typeArguments*/ undefined, argumentsList, location);
-    }
-    ts.createReactCreateElement = createReactCreateElement;
-    function createLetDeclarationList(declarations, location) {
-        return createVariableDeclarationList(declarations, location, 1 /* Let */);
-    }
-    ts.createLetDeclarationList = createLetDeclarationList;
-    function createConstDeclarationList(declarations, location) {
-        return createVariableDeclarationList(declarations, location, 2 /* Const */);
-    }
-    ts.createConstDeclarationList = createConstDeclarationList;
-    // Helpers
-    function createHelperName(externalHelpersModuleName, name) {
-        return externalHelpersModuleName
-            ? createPropertyAccess(externalHelpersModuleName, name)
-            : createIdentifier(name);
-    }
-    ts.createHelperName = createHelperName;
-    function createExtendsHelper(externalHelpersModuleName, name) {
-        return createCall(createHelperName(externalHelpersModuleName, "__extends"), 
-        /*typeArguments*/ undefined, [
-            name,
-            createIdentifier("_super")
-        ]);
-    }
-    ts.createExtendsHelper = createExtendsHelper;
-    function createAssignHelper(externalHelpersModuleName, attributesSegments) {
-        return createCall(createHelperName(externalHelpersModuleName, "__assign"), 
-        /*typeArguments*/ undefined, attributesSegments);
-    }
-    ts.createAssignHelper = createAssignHelper;
-    function createParamHelper(externalHelpersModuleName, expression, parameterOffset, location) {
-        return createCall(createHelperName(externalHelpersModuleName, "__param"), 
-        /*typeArguments*/ undefined, [
-            createLiteral(parameterOffset),
-            expression
-        ], location);
-    }
-    ts.createParamHelper = createParamHelper;
-    function createMetadataHelper(externalHelpersModuleName, metadataKey, metadataValue) {
-        return createCall(createHelperName(externalHelpersModuleName, "__metadata"), 
-        /*typeArguments*/ undefined, [
-            createLiteral(metadataKey),
-            metadataValue
-        ]);
-    }
-    ts.createMetadataHelper = createMetadataHelper;
-    function createDecorateHelper(externalHelpersModuleName, decoratorExpressions, target, memberName, descriptor, location) {
-        var argumentsArray = [];
-        argumentsArray.push(createArrayLiteral(decoratorExpressions, /*location*/ undefined, /*multiLine*/ true));
-        argumentsArray.push(target);
-        if (memberName) {
-            argumentsArray.push(memberName);
-            if (descriptor) {
-                argumentsArray.push(descriptor);
-            }
+        function isStartOfDeclaration() {
+            return lookAhead(isDeclaration);
         }
-        return createCall(createHelperName(externalHelpersModuleName, "__decorate"), /*typeArguments*/ undefined, argumentsArray, location);
-    }
-    ts.createDecorateHelper = createDecorateHelper;
-    function createAwaiterHelper(externalHelpersModuleName, hasLexicalArguments, promiseConstructor, body) {
-        var generatorFunc = createFunctionExpression(createNode(37 /* AsteriskToken */), 
-        /*name*/ undefined, 
-        /*typeParameters*/ undefined, 
-        /*parameters*/ [], 
-        /*type*/ undefined, body);
-        // Mark this node as originally an async function
-        (generatorFunc.emitNode || (generatorFunc.emitNode = {})).flags |= 2097152 /* AsyncFunctionBody */;
-        return createCall(createHelperName(externalHelpersModuleName, "__awaiter"), 
-        /*typeArguments*/ undefined, [
-            createThis(),
-            hasLexicalArguments ? createIdentifier("arguments") : createVoidZero(),
-            promiseConstructor ? createExpressionFromEntityName(promiseConstructor) : createVoidZero(),
-            generatorFunc
-        ]);
-    }
-    ts.createAwaiterHelper = createAwaiterHelper;
-    function createHasOwnProperty(target, propertyName) {
-        return createCall(createPropertyAccess(target, "hasOwnProperty"), 
-        /*typeArguments*/ undefined, [propertyName]);
-    }
-    ts.createHasOwnProperty = createHasOwnProperty;
-    function createObjectCreate(prototype) {
-        return createCall(createPropertyAccess(createIdentifier("Object"), "create"), 
-        /*typeArguments*/ undefined, [prototype]);
-    }
-    function createGeti(target) {
-        // name => super[name]
-        return createArrowFunction(
-        /*modifiers*/ undefined, 
-        /*typeParameters*/ undefined, [createParameter("name")], 
-        /*type*/ undefined, 
-        /*equalsGreaterThanToken*/ undefined, createElementAccess(target, createIdentifier("name")));
-    }
-    function createSeti(target) {
-        // (name, value) => super[name] = value
-        return createArrowFunction(
-        /*modifiers*/ undefined, 
-        /*typeParameters*/ undefined, [
-            createParameter("name"),
-            createParameter("value")
-        ], 
-        /*type*/ undefined, 
-        /*equalsGreaterThanToken*/ undefined, createAssignment(createElementAccess(target, createIdentifier("name")), createIdentifier("value")));
-    }
-    function createAdvancedAsyncSuperHelper() {
-        //  const _super = (function (geti, seti) {
-        //      const cache = Object.create(null);
-        //      return name => cache[name] || (cache[name] = { get value() { return geti(name); }, set value(v) { seti(name, v); } });
-        //  })(name => super[name], (name, value) => super[name] = value);
-        // const cache = Object.create(null);
-        var createCache = createVariableStatement(
-        /*modifiers*/ undefined, createConstDeclarationList([
-            createVariableDeclaration("cache", 
-            /*type*/ undefined, createObjectCreate(createNull()))
-        ]));
-        // get value() { return geti(name); }
-        var getter = createGetAccessor(
-        /*decorators*/ undefined, 
-        /*modifiers*/ undefined, "value", 
-        /*parameters*/ [], 
-        /*type*/ undefined, createBlock([
-            createReturn(createCall(createIdentifier("geti"), 
-            /*typeArguments*/ undefined, [createIdentifier("name")]))
-        ]));
-        // set value(v) { seti(name, v); }
-        var setter = createSetAccessor(
-        /*decorators*/ undefined, 
-        /*modifiers*/ undefined, "value", [createParameter("v")], createBlock([
-            createStatement(createCall(createIdentifier("seti"), 
-            /*typeArguments*/ undefined, [
-                createIdentifier("name"),
-                createIdentifier("v")
-            ]))
-        ]));
-        // return name => cache[name] || ...
-        var getOrCreateAccessorsForName = createReturn(createArrowFunction(
-        /*modifiers*/ undefined, 
-        /*typeParameters*/ undefined, [createParameter("name")], 
-        /*type*/ undefined, 
-        /*equalsGreaterThanToken*/ undefined, createLogicalOr(createElementAccess(createIdentifier("cache"), createIdentifier("name")), createParen(createAssignment(createElementAccess(createIdentifier("cache"), createIdentifier("name")), createObjectLiteral([
-            getter,
-            setter
-        ]))))));
-        //  const _super = (function (geti, seti) {
-        //      const cache = Object.create(null);
-        //      return name => cache[name] || (cache[name] = { get value() { return geti(name); }, set value(v) { seti(name, v); } });
-        //  })(name => super[name], (name, value) => super[name] = value);
-        return createVariableStatement(
-        /*modifiers*/ undefined, createConstDeclarationList([
-            createVariableDeclaration("_super", 
-            /*type*/ undefined, createCall(createParen(createFunctionExpression(
-            /*asteriskToken*/ undefined, 
-            /*name*/ undefined, 
-            /*typeParameters*/ undefined, [
-                createParameter("geti"),
-                createParameter("seti")
-            ], 
-            /*type*/ undefined, createBlock([
-                createCache,
-                getOrCreateAccessorsForName
-            ]))), 
-            /*typeArguments*/ undefined, [
-                createGeti(createSuper()),
-                createSeti(createSuper())
-            ]))
-        ]));
-    }
-    ts.createAdvancedAsyncSuperHelper = createAdvancedAsyncSuperHelper;
-    function createSimpleAsyncSuperHelper() {
-        return createVariableStatement(
-        /*modifiers*/ undefined, createConstDeclarationList([
-            createVariableDeclaration("_super", 
-            /*type*/ undefined, createGeti(createSuper()))
-        ]));
-    }
-    ts.createSimpleAsyncSuperHelper = createSimpleAsyncSuperHelper;
-    function shouldBeCapturedInTempVariable(node, cacheIdentifiers) {
-        var target = skipParentheses(node);
-        switch (target.kind) {
-            case 69 /* Identifier */:
-                return cacheIdentifiers;
-            case 97 /* ThisKeyword */:
-            case 8 /* NumericLiteral */:
-            case 9 /* StringLiteral */:
-                return false;
-            case 170 /* ArrayLiteralExpression */:
-                var elements = target.elements;
-                if (elements.length === 0) {
-                    return false;
-                }
-                return true;
-            case 171 /* ObjectLiteralExpression */:
-                return target.properties.length > 0;
-            default:
-                return true;
+        function isStartOfStatement() {
+            switch (token()) {
+                case 57 /* AtToken */:
+                case 25 /* SemicolonToken */:
+                case 17 /* OpenBraceToken */:
+                case 104 /* VarKeyword */:
+                case 110 /* LetKeyword */:
+                case 89 /* FunctionKeyword */:
+                case 75 /* ClassKeyword */:
+                case 83 /* EnumKeyword */:
+                case 90 /* IfKeyword */:
+                case 81 /* DoKeyword */:
+                case 106 /* WhileKeyword */:
+                case 88 /* ForKeyword */:
+                case 77 /* ContinueKeyword */:
+                case 72 /* BreakKeyword */:
+                case 96 /* ReturnKeyword */:
+                case 107 /* WithKeyword */:
+                case 98 /* SwitchKeyword */:
+                case 100 /* ThrowKeyword */:
+                case 102 /* TryKeyword */:
+                case 78 /* DebuggerKeyword */:
+                // 'catch' and 'finally' do not actually indicate that the code is part of a statement,
+                // however, we say they are here so that we may gracefully parse them and error later.
+                case 74 /* CatchKeyword */:
+                case 87 /* FinallyKeyword */:
+                    return true;
+                case 91 /* ImportKeyword */:
+                    return isStartOfDeclaration() || lookAhead(nextTokenIsOpenParenOrLessThan);
+                case 76 /* ConstKeyword */:
+                case 84 /* ExportKeyword */:
+                    return isStartOfDeclaration();
+                case 120 /* AsyncKeyword */:
+                case 124 /* DeclareKeyword */:
+                case 109 /* InterfaceKeyword */:
+                case 128 /* ModuleKeyword */:
+                case 129 /* NamespaceKeyword */:
+                case 138 /* TypeKeyword */:
+                case 141 /* GlobalKeyword */:
+                    // When these don't start a declaration, they're an identifier in an expression statement
+                    return true;
+                case 114 /* PublicKeyword */:
+                case 112 /* PrivateKeyword */:
+                case 113 /* ProtectedKeyword */:
+                case 115 /* StaticKeyword */:
+                case 131 /* ReadonlyKeyword */:
+                    // When these don't start a declaration, they may be the start of a class member if an identifier
+                    // immediately follows. Otherwise they're an identifier in an expression statement.
+                    return isStartOfDeclaration() || !lookAhead(nextTokenIsIdentifierOrKeywordOnSameLine);
+                default:
+                    return isStartOfExpression();
+            }
         }
-    }
-    function createCallBinding(expression, recordTempVariable, languageVersion, cacheIdentifiers) {
-        var callee = skipOuterExpressions(expression, 7 /* All */);
-        var thisArg;
-        var target;
-        if (ts.isSuperProperty(callee)) {
-            thisArg = createThis();
-            target = callee;
+        function nextTokenIsIdentifierOrStartOfDestructuring() {
+            nextToken();
+            return isIdentifier() || token() === 17 /* OpenBraceToken */ || token() === 21 /* OpenBracketToken */;
         }
-        else if (callee.kind === 95 /* SuperKeyword */) {
-            thisArg = createThis();
-            target = languageVersion < 2 /* ES6 */ ? createIdentifier("_super", /*location*/ callee) : callee;
+        function isLetDeclaration() {
+            // In ES6 'let' always starts a lexical declaration if followed by an identifier or {
+            // or [.
+            return lookAhead(nextTokenIsIdentifierOrStartOfDestructuring);
         }
-        else {
-            switch (callee.kind) {
-                case 172 /* PropertyAccessExpression */: {
-                    if (shouldBeCapturedInTempVariable(callee.expression, cacheIdentifiers)) {
-                        // for `a.b()` target is `(_a = a).b` and thisArg is `_a`
-                        thisArg = createTempVariable(recordTempVariable);
-                        target = createPropertyAccess(createAssignment(thisArg, callee.expression, 
-                        /*location*/ callee.expression), callee.name, 
-                        /*location*/ callee);
+        function parseStatement() {
+            switch (token()) {
+                case 25 /* SemicolonToken */:
+                    return parseEmptyStatement();
+                case 17 /* OpenBraceToken */:
+                    return parseBlock(/*ignoreMissingOpenBrace*/ false);
+                case 104 /* VarKeyword */:
+                    return parseVariableStatement(scanner.getStartPos(), /*decorators*/ undefined, /*modifiers*/ undefined);
+                case 110 /* LetKeyword */:
+                    if (isLetDeclaration()) {
+                        return parseVariableStatement(scanner.getStartPos(), /*decorators*/ undefined, /*modifiers*/ undefined);
                     }
-                    else {
-                        thisArg = callee.expression;
-                        target = callee;
+                    break;
+                case 89 /* FunctionKeyword */:
+                    return parseFunctionDeclaration(scanner.getStartPos(), /*decorators*/ undefined, /*modifiers*/ undefined);
+                case 75 /* ClassKeyword */:
+                    return parseClassDeclaration(scanner.getStartPos(), /*decorators*/ undefined, /*modifiers*/ undefined);
+                case 90 /* IfKeyword */:
+                    return parseIfStatement();
+                case 81 /* DoKeyword */:
+                    return parseDoStatement();
+                case 106 /* WhileKeyword */:
+                    return parseWhileStatement();
+                case 88 /* ForKeyword */:
+                    return parseForOrForInOrForOfStatement();
+                case 77 /* ContinueKeyword */:
+                    return parseBreakOrContinueStatement(217 /* ContinueStatement */);
+                case 72 /* BreakKeyword */:
+                    return parseBreakOrContinueStatement(218 /* BreakStatement */);
+                case 96 /* ReturnKeyword */:
+                    return parseReturnStatement();
+                case 107 /* WithKeyword */:
+                    return parseWithStatement();
+                case 98 /* SwitchKeyword */:
+                    return parseSwitchStatement();
+                case 100 /* ThrowKeyword */:
+                    return parseThrowStatement();
+                case 102 /* TryKeyword */:
+                // Include 'catch' and 'finally' for error recovery.
+                case 74 /* CatchKeyword */:
+                case 87 /* FinallyKeyword */:
+                    return parseTryStatement();
+                case 78 /* DebuggerKeyword */:
+                    return parseDebuggerStatement();
+                case 57 /* AtToken */:
+                    return parseDeclaration();
+                case 120 /* AsyncKeyword */:
+                case 109 /* InterfaceKeyword */:
+                case 138 /* TypeKeyword */:
+                case 128 /* ModuleKeyword */:
+                case 129 /* NamespaceKeyword */:
+                case 124 /* DeclareKeyword */:
+                case 76 /* ConstKeyword */:
+                case 83 /* EnumKeyword */:
+                case 84 /* ExportKeyword */:
+                case 91 /* ImportKeyword */:
+                case 112 /* PrivateKeyword */:
+                case 113 /* ProtectedKeyword */:
+                case 114 /* PublicKeyword */:
+                case 117 /* AbstractKeyword */:
+                case 115 /* StaticKeyword */:
+                case 131 /* ReadonlyKeyword */:
+                case 141 /* GlobalKeyword */:
+                    if (isStartOfDeclaration()) {
+                        return parseDeclaration();
                     }
                     break;
-                }
-                case 173 /* ElementAccessExpression */: {
-                    if (shouldBeCapturedInTempVariable(callee.expression, cacheIdentifiers)) {
-                        // for `a[b]()` target is `(_a = a)[b]` and thisArg is `_a`
-                        thisArg = createTempVariable(recordTempVariable);
-                        target = createElementAccess(createAssignment(thisArg, callee.expression, 
-                        /*location*/ callee.expression), callee.argumentExpression, 
-                        /*location*/ callee);
+            }
+            return parseExpressionOrLabeledStatement();
+        }
+        function parseDeclaration() {
+            var fullStart = getNodePos();
+            var decorators = parseDecorators();
+            var modifiers = parseModifiers();
+            switch (token()) {
+                case 104 /* VarKeyword */:
+                case 110 /* LetKeyword */:
+                case 76 /* ConstKeyword */:
+                    return parseVariableStatement(fullStart, decorators, modifiers);
+                case 89 /* FunctionKeyword */:
+                    return parseFunctionDeclaration(fullStart, decorators, modifiers);
+                case 75 /* ClassKeyword */:
+                    return parseClassDeclaration(fullStart, decorators, modifiers);
+                case 109 /* InterfaceKeyword */:
+                    return parseInterfaceDeclaration(fullStart, decorators, modifiers);
+                case 138 /* TypeKeyword */:
+                    return parseTypeAliasDeclaration(fullStart, decorators, modifiers);
+                case 83 /* EnumKeyword */:
+                    return parseEnumDeclaration(fullStart, decorators, modifiers);
+                case 141 /* GlobalKeyword */:
+                case 128 /* ModuleKeyword */:
+                case 129 /* NamespaceKeyword */:
+                    return parseModuleDeclaration(fullStart, decorators, modifiers);
+                case 91 /* ImportKeyword */:
+                    return parseImportDeclarationOrImportEqualsDeclaration(fullStart, decorators, modifiers);
+                case 84 /* ExportKeyword */:
+                    nextToken();
+                    switch (token()) {
+                        case 79 /* DefaultKeyword */:
+                        case 58 /* EqualsToken */:
+                            return parseExportAssignment(fullStart, decorators, modifiers);
+                        case 118 /* AsKeyword */:
+                            return parseNamespaceExportDeclaration(fullStart, decorators, modifiers);
+                        default:
+                            return parseExportDeclaration(fullStart, decorators, modifiers);
                     }
-                    else {
-                        thisArg = callee.expression;
-                        target = callee;
+                default:
+                    if (decorators || modifiers) {
+                        // We reached this point because we encountered decorators and/or modifiers and assumed a declaration
+                        // would follow. For recovery and error reporting purposes, return an incomplete declaration.
+                        var node = createMissingNode(247 /* MissingDeclaration */, /*reportAtCurrentPosition*/ true, ts.Diagnostics.Declaration_expected);
+                        node.pos = fullStart;
+                        node.decorators = decorators;
+                        node.modifiers = modifiers;
+                        return finishNode(node);
                     }
-                    break;
-                }
-                default: {
-                    // for `a()` target is `a` and thisArg is `void 0`
-                    thisArg = createVoidZero();
-                    target = parenthesizeForAccess(expression);
-                    break;
-                }
             }
         }
-        return { target: target, thisArg: thisArg };
-    }
-    ts.createCallBinding = createCallBinding;
-    function inlineExpressions(expressions) {
-        return ts.reduceLeft(expressions, createComma);
-    }
-    ts.inlineExpressions = inlineExpressions;
-    function createExpressionFromEntityName(node) {
-        if (ts.isQualifiedName(node)) {
-            var left = createExpressionFromEntityName(node.left);
-            var right = getMutableClone(node.right);
-            return createPropertyAccess(left, right, /*location*/ node);
+        function nextTokenIsIdentifierOrStringLiteralOnSameLine() {
+            nextToken();
+            return !scanner.hasPrecedingLineBreak() && (isIdentifier() || token() === 9 /* StringLiteral */);
         }
-        else {
-            return getMutableClone(node);
+        function parseFunctionBlockOrSemicolon(isGenerator, isAsync, diagnosticMessage) {
+            if (token() !== 17 /* OpenBraceToken */ && canParseSemicolon()) {
+                parseSemicolon();
+                return;
+            }
+            return parseFunctionBlock(isGenerator, isAsync, /*ignoreMissingOpenBrace*/ false, diagnosticMessage);
         }
-    }
-    ts.createExpressionFromEntityName = createExpressionFromEntityName;
-    function createExpressionForPropertyName(memberName) {
-        if (ts.isIdentifier(memberName)) {
-            return createLiteral(memberName, /*location*/ undefined);
+        // DECLARATIONS
+        function parseArrayBindingElement() {
+            if (token() === 26 /* CommaToken */) {
+                return createNode(200 /* OmittedExpression */);
+            }
+            var node = createNode(176 /* BindingElement */);
+            node.dotDotDotToken = parseOptionalToken(24 /* DotDotDotToken */);
+            node.name = parseIdentifierOrPattern();
+            node.initializer = parseBindingElementInitializer(/*inParameter*/ false);
+            return finishNode(node);
         }
-        else if (ts.isComputedPropertyName(memberName)) {
-            return getMutableClone(memberName.expression);
+        function parseObjectBindingElement() {
+            var node = createNode(176 /* BindingElement */);
+            node.dotDotDotToken = parseOptionalToken(24 /* DotDotDotToken */);
+            var tokenIsIdentifier = isIdentifier();
+            var propertyName = parsePropertyName();
+            if (tokenIsIdentifier && token() !== 56 /* ColonToken */) {
+                node.name = propertyName;
+            }
+            else {
+                parseExpected(56 /* ColonToken */);
+                node.propertyName = propertyName;
+                node.name = parseIdentifierOrPattern();
+            }
+            node.initializer = parseBindingElementInitializer(/*inParameter*/ false);
+            return finishNode(node);
         }
-        else {
-            return getMutableClone(memberName);
+        function parseObjectBindingPattern() {
+            var node = createNode(174 /* ObjectBindingPattern */);
+            parseExpected(17 /* OpenBraceToken */);
+            node.elements = parseDelimitedList(9 /* ObjectBindingElements */, parseObjectBindingElement);
+            parseExpected(18 /* CloseBraceToken */);
+            return finishNode(node);
         }
-    }
-    ts.createExpressionForPropertyName = createExpressionForPropertyName;
-    function createExpressionForObjectLiteralElementLike(node, property, receiver) {
-        switch (property.kind) {
-            case 149 /* GetAccessor */:
-            case 150 /* SetAccessor */:
-                return createExpressionForAccessorDeclaration(node.properties, property, receiver, node.multiLine);
-            case 253 /* PropertyAssignment */:
-                return createExpressionForPropertyAssignment(property, receiver);
-            case 254 /* ShorthandPropertyAssignment */:
-                return createExpressionForShorthandPropertyAssignment(property, receiver);
-            case 147 /* MethodDeclaration */:
-                return createExpressionForMethodDeclaration(property, receiver);
+        function parseArrayBindingPattern() {
+            var node = createNode(175 /* ArrayBindingPattern */);
+            parseExpected(21 /* OpenBracketToken */);
+            node.elements = parseDelimitedList(10 /* ArrayBindingElements */, parseArrayBindingElement);
+            parseExpected(22 /* CloseBracketToken */);
+            return finishNode(node);
         }
-    }
-    ts.createExpressionForObjectLiteralElementLike = createExpressionForObjectLiteralElementLike;
-    function createExpressionForAccessorDeclaration(properties, property, receiver, multiLine) {
-        var _a = ts.getAllAccessorDeclarations(properties, property), firstAccessor = _a.firstAccessor, getAccessor = _a.getAccessor, setAccessor = _a.setAccessor;
-        if (property === firstAccessor) {
-            var properties_1 = [];
-            if (getAccessor) {
-                var getterFunction = createFunctionExpression(
-                /*asteriskToken*/ undefined, 
-                /*name*/ undefined, 
-                /*typeParameters*/ undefined, getAccessor.parameters, 
-                /*type*/ undefined, getAccessor.body, 
-                /*location*/ getAccessor);
-                setOriginalNode(getterFunction, getAccessor);
-                var getter = createPropertyAssignment("get", getterFunction);
-                properties_1.push(getter);
+        function isIdentifierOrPattern() {
+            return token() === 17 /* OpenBraceToken */ || token() === 21 /* OpenBracketToken */ || isIdentifier();
+        }
+        function parseIdentifierOrPattern() {
+            if (token() === 21 /* OpenBracketToken */) {
+                return parseArrayBindingPattern();
             }
-            if (setAccessor) {
-                var setterFunction = createFunctionExpression(
-                /*asteriskToken*/ undefined, 
-                /*name*/ undefined, 
-                /*typeParameters*/ undefined, setAccessor.parameters, 
-                /*type*/ undefined, setAccessor.body, 
-                /*location*/ setAccessor);
-                setOriginalNode(setterFunction, setAccessor);
-                var setter = createPropertyAssignment("set", setterFunction);
-                properties_1.push(setter);
-            }
-            properties_1.push(createPropertyAssignment("enumerable", createLiteral(true)));
-            properties_1.push(createPropertyAssignment("configurable", createLiteral(true)));
-            var expression = createCall(createPropertyAccess(createIdentifier("Object"), "defineProperty"), 
-            /*typeArguments*/ undefined, [
-                receiver,
-                createExpressionForPropertyName(property.name),
-                createObjectLiteral(properties_1, /*location*/ undefined, multiLine)
-            ], 
-            /*location*/ firstAccessor);
-            return ts.aggregateTransformFlags(expression);
+            if (token() === 17 /* OpenBraceToken */) {
+                return parseObjectBindingPattern();
+            }
+            return parseIdentifier();
         }
-        return undefined;
-    }
-    function createExpressionForPropertyAssignment(property, receiver) {
-        return ts.aggregateTransformFlags(setOriginalNode(createAssignment(createMemberAccessForPropertyName(receiver, property.name, /*location*/ property.name), property.initializer, 
-        /*location*/ property), 
-        /*original*/ property));
-    }
-    function createExpressionForShorthandPropertyAssignment(property, receiver) {
-        return ts.aggregateTransformFlags(setOriginalNode(createAssignment(createMemberAccessForPropertyName(receiver, property.name, /*location*/ property.name), getSynthesizedClone(property.name), 
-        /*location*/ property), 
-        /*original*/ property));
-    }
-    function createExpressionForMethodDeclaration(method, receiver) {
-        return ts.aggregateTransformFlags(setOriginalNode(createAssignment(createMemberAccessForPropertyName(receiver, method.name, /*location*/ method.name), setOriginalNode(createFunctionExpression(method.asteriskToken, 
-        /*name*/ undefined, 
-        /*typeParameters*/ undefined, method.parameters, 
-        /*type*/ undefined, method.body, 
-        /*location*/ method), 
-        /*original*/ method), 
-        /*location*/ method), 
-        /*original*/ method));
-    }
-    // Utilities
-    function isUseStrictPrologue(node) {
-        return node.expression.text === "use strict";
-    }
-    /**
-     * Add any necessary prologue-directives into target statement-array.
-     * The function needs to be called during each transformation step.
-     * This function needs to be called whenever we transform the statement
-     * list of a source file, namespace, or function-like body.
-     *
-     * @param target: result statements array
-     * @param source: origin statements array
-     * @param ensureUseStrict: boolean determining whether the function need to add prologue-directives
-     * @param visitor: Optional callback used to visit any custom prologue directives.
-     */
-    function addPrologueDirectives(target, source, ensureUseStrict, visitor) {
-        ts.Debug.assert(target.length === 0, "PrologueDirectives should be at the first statement in the target statements array");
-        var foundUseStrict = false;
-        var statementOffset = 0;
-        var numStatements = source.length;
-        while (statementOffset < numStatements) {
-            var statement = source[statementOffset];
-            if (ts.isPrologueDirective(statement)) {
-                if (isUseStrictPrologue(statement)) {
-                    foundUseStrict = true;
-                }
-                target.push(statement);
+        function parseVariableDeclaration() {
+            var node = createNode(226 /* VariableDeclaration */);
+            node.name = parseIdentifierOrPattern();
+            node.type = parseTypeAnnotation();
+            if (!isInOrOfKeyword(token())) {
+                node.initializer = parseInitializer(/*inParameter*/ false);
             }
-            else {
-                if (ensureUseStrict && !foundUseStrict) {
-                    target.push(startOnNewLine(createStatement(createLiteral("use strict"))));
-                    foundUseStrict = true;
-                }
-                if (getEmitFlags(statement) & 8388608 /* CustomPrologue */) {
-                    target.push(visitor ? ts.visitNode(statement, visitor, ts.isStatement) : statement);
-                }
-                else {
+            return finishNode(node);
+        }
+        function parseVariableDeclarationList(inForStatementInitializer) {
+            var node = createNode(227 /* VariableDeclarationList */);
+            switch (token()) {
+                case 104 /* VarKeyword */:
                     break;
-                }
+                case 110 /* LetKeyword */:
+                    node.flags |= 1 /* Let */;
+                    break;
+                case 76 /* ConstKeyword */:
+                    node.flags |= 2 /* Const */;
+                    break;
+                default:
+                    ts.Debug.fail();
             }
-            statementOffset++;
+            nextToken();
+            // The user may have written the following:
+            //
+            //    for (let of X) { }
+            //
+            // In this case, we want to parse an empty declaration list, and then parse 'of'
+            // as a keyword. The reason this is not automatic is that 'of' is a valid identifier.
+            // So we need to look ahead to determine if 'of' should be treated as a keyword in
+            // this context.
+            // The checker will then give an error that there is an empty declaration list.
+            if (token() === 142 /* OfKeyword */ && lookAhead(canFollowContextualOfKeyword)) {
+                node.declarations = createMissingList();
+            }
+            else {
+                var savedDisallowIn = inDisallowInContext();
+                setDisallowInContext(inForStatementInitializer);
+                node.declarations = parseDelimitedList(8 /* VariableDeclarations */, parseVariableDeclaration);
+                setDisallowInContext(savedDisallowIn);
+            }
+            return finishNode(node);
         }
-        return statementOffset;
-    }
-    ts.addPrologueDirectives = addPrologueDirectives;
-    /**
-     * Wraps the operand to a BinaryExpression in parentheses if they are needed to preserve the intended
-     * order of operations.
-     *
-     * @param binaryOperator The operator for the BinaryExpression.
-     * @param operand The operand for the BinaryExpression.
-     * @param isLeftSideOfBinary A value indicating whether the operand is the left side of the
-     *                           BinaryExpression.
-     */
-    function parenthesizeBinaryOperand(binaryOperator, operand, isLeftSideOfBinary, leftOperand) {
-        var skipped = skipPartiallyEmittedExpressions(operand);
-        // If the resulting expression is already parenthesized, we do not need to do any further processing.
-        if (skipped.kind === 178 /* ParenthesizedExpression */) {
-            return operand;
+        function canFollowContextualOfKeyword() {
+            return nextTokenIsIdentifier() && nextToken() === 20 /* CloseParenToken */;
         }
-        return binaryOperandNeedsParentheses(binaryOperator, operand, isLeftSideOfBinary, leftOperand)
-            ? createParen(operand)
-            : operand;
-    }
-    ts.parenthesizeBinaryOperand = parenthesizeBinaryOperand;
-    /**
-     * Determines whether the operand to a BinaryExpression needs to be parenthesized.
-     *
-     * @param binaryOperator The operator for the BinaryExpression.
-     * @param operand The operand for the BinaryExpression.
-     * @param isLeftSideOfBinary A value indicating whether the operand is the left side of the
-     *                           BinaryExpression.
-     */
-    function binaryOperandNeedsParentheses(binaryOperator, operand, isLeftSideOfBinary, leftOperand) {
-        // If the operand has lower precedence, then it needs to be parenthesized to preserve the
-        // intent of the expression. For example, if the operand is `a + b` and the operator is
-        // `*`, then we need to parenthesize the operand to preserve the intended order of
-        // operations: `(a + b) * x`.
-        //
-        // If the operand has higher precedence, then it does not need to be parenthesized. For
-        // example, if the operand is `a * b` and the operator is `+`, then we do not need to
-        // parenthesize to preserve the intended order of operations: `a * b + x`.
-        //
-        // If the operand has the same precedence, then we need to check the associativity of
-        // the operator based on whether this is the left or right operand of the expression.
-        //
-        // For example, if `a / d` is on the right of operator `*`, we need to parenthesize
-        // to preserve the intended order of operations: `x * (a / d)`
-        //
-        // If `a ** d` is on the left of operator `**`, we need to parenthesize to preserve
-        // the intended order of operations: `(a ** b) ** c`
-        var binaryOperatorPrecedence = ts.getOperatorPrecedence(187 /* BinaryExpression */, binaryOperator);
-        var binaryOperatorAssociativity = ts.getOperatorAssociativity(187 /* BinaryExpression */, binaryOperator);
-        var emittedOperand = skipPartiallyEmittedExpressions(operand);
-        var operandPrecedence = ts.getExpressionPrecedence(emittedOperand);
-        switch (ts.compareValues(operandPrecedence, binaryOperatorPrecedence)) {
-            case -1 /* LessThan */:
-                // If the operand is the right side of a right-associative binary operation
-                // and is a yield expression, then we do not need parentheses.
-                if (!isLeftSideOfBinary
-                    && binaryOperatorAssociativity === 1 /* Right */
-                    && operand.kind === 190 /* YieldExpression */) {
-                    return false;
-                }
-                return true;
-            case 1 /* GreaterThan */:
-                return false;
-            case 0 /* EqualTo */:
-                if (isLeftSideOfBinary) {
-                    // No need to parenthesize the left operand when the binary operator is
-                    // left associative:
-                    //  (a*b)/x    ->  a*b/x
-                    //  (a**b)/x   ->  a**b/x
-                    //
-                    // Parentheses are needed for the left operand when the binary operator is
-                    // right associative:
-                    //  (a/b)**x   ->  (a/b)**x
-                    //  (a**b)**x  ->  (a**b)**x
-                    return binaryOperatorAssociativity === 1 /* Right */;
-                }
-                else {
-                    if (ts.isBinaryExpression(emittedOperand)
-                        && emittedOperand.operatorToken.kind === binaryOperator) {
-                        // No need to parenthesize the right operand when the binary operator and
-                        // operand are the same and one of the following:
-                        //  x*(a*b)     => x*a*b
-                        //  x|(a|b)     => x|a|b
-                        //  x&(a&b)     => x&a&b
-                        //  x^(a^b)     => x^a^b
-                        if (operatorHasAssociativeProperty(binaryOperator)) {
-                            return false;
-                        }
-                        // No need to parenthesize the right operand when the binary operator
-                        // is plus (+) if both the left and right operands consist solely of either
-                        // literals of the same kind or binary plus (+) expressions for literals of
-                        // the same kind (recursively).
-                        //  "a"+(1+2)       => "a"+(1+2)
-                        //  "a"+("b"+"c")   => "a"+"b"+"c"
-                        if (binaryOperator === 35 /* PlusToken */) {
-                            var leftKind = leftOperand ? getLiteralKindOfBinaryPlusOperand(leftOperand) : 0 /* Unknown */;
-                            if (ts.isLiteralKind(leftKind) && leftKind === getLiteralKindOfBinaryPlusOperand(emittedOperand)) {
-                                return false;
-                            }
-                        }
-                    }
-                    // No need to parenthesize the right operand when the operand is right
-                    // associative:
-                    //  x/(a**b)    -> x/a**b
-                    //  x**(a**b)   -> x**a**b
-                    //
-                    // Parentheses are needed for the right operand when the operand is left
-                    // associative:
-                    //  x/(a*b)     -> x/(a*b)
-                    //  x**(a/b)    -> x**(a/b)
-                    var operandAssociativity = ts.getExpressionAssociativity(emittedOperand);
-                    return operandAssociativity === 0 /* Left */;
-                }
+        function parseVariableStatement(fullStart, decorators, modifiers) {
+            var node = createNode(208 /* VariableStatement */, fullStart);
+            node.decorators = decorators;
+            node.modifiers = modifiers;
+            node.declarationList = parseVariableDeclarationList(/*inForStatementInitializer*/ false);
+            parseSemicolon();
+            return addJSDocComment(finishNode(node));
         }
-    }
-    /**
-     * Determines whether a binary operator is mathematically associative.
-     *
-     * @param binaryOperator The binary operator.
-     */
-    function operatorHasAssociativeProperty(binaryOperator) {
-        // The following operators are associative in JavaScript:
-        //  (a*b)*c     -> a*(b*c)  -> a*b*c
-        //  (a|b)|c     -> a|(b|c)  -> a|b|c
-        //  (a&b)&c     -> a&(b&c)  -> a&b&c
-        //  (a^b)^c     -> a^(b^c)  -> a^b^c
-        //
-        // While addition is associative in mathematics, JavaScript's `+` is not
-        // guaranteed to be associative as it is overloaded with string concatenation.
-        return binaryOperator === 37 /* AsteriskToken */
-            || binaryOperator === 47 /* BarToken */
-            || binaryOperator === 46 /* AmpersandToken */
-            || binaryOperator === 48 /* CaretToken */;
-    }
-    /**
-     * This function determines whether an expression consists of a homogeneous set of
-     * literal expressions or binary plus expressions that all share the same literal kind.
-     * It is used to determine whether the right-hand operand of a binary plus expression can be
-     * emitted without parentheses.
-     */
-    function getLiteralKindOfBinaryPlusOperand(node) {
-        node = skipPartiallyEmittedExpressions(node);
-        if (ts.isLiteralKind(node.kind)) {
-            return node.kind;
+        function parseFunctionDeclaration(fullStart, decorators, modifiers) {
+            var node = createNode(228 /* FunctionDeclaration */, fullStart);
+            node.decorators = decorators;
+            node.modifiers = modifiers;
+            parseExpected(89 /* FunctionKeyword */);
+            node.asteriskToken = parseOptionalToken(39 /* AsteriskToken */);
+            node.name = ts.hasModifier(node, 512 /* Default */) ? parseOptionalIdentifier() : parseIdentifier();
+            var isGenerator = !!node.asteriskToken;
+            var isAsync = ts.hasModifier(node, 256 /* Async */);
+            fillSignature(56 /* ColonToken */, /*yieldContext*/ isGenerator, /*awaitContext*/ isAsync, /*requireCompleteParameterList*/ false, node);
+            node.body = parseFunctionBlockOrSemicolon(isGenerator, isAsync, ts.Diagnostics.or_expected);
+            return addJSDocComment(finishNode(node));
         }
-        if (node.kind === 187 /* BinaryExpression */ && node.operatorToken.kind === 35 /* PlusToken */) {
-            if (node.cachedLiteralKind !== undefined) {
-                return node.cachedLiteralKind;
+        function parseConstructorDeclaration(pos, decorators, modifiers) {
+            var node = createNode(152 /* Constructor */, pos);
+            node.decorators = decorators;
+            node.modifiers = modifiers;
+            parseExpected(123 /* ConstructorKeyword */);
+            fillSignature(56 /* ColonToken */, /*yieldContext*/ false, /*awaitContext*/ false, /*requireCompleteParameterList*/ false, node);
+            node.body = parseFunctionBlockOrSemicolon(/*isGenerator*/ false, /*isAsync*/ false, ts.Diagnostics.or_expected);
+            return addJSDocComment(finishNode(node));
+        }
+        function parseMethodDeclaration(fullStart, decorators, modifiers, asteriskToken, name, questionToken, diagnosticMessage) {
+            var method = createNode(151 /* MethodDeclaration */, fullStart);
+            method.decorators = decorators;
+            method.modifiers = modifiers;
+            method.asteriskToken = asteriskToken;
+            method.name = name;
+            method.questionToken = questionToken;
+            var isGenerator = !!asteriskToken;
+            var isAsync = ts.hasModifier(method, 256 /* Async */);
+            fillSignature(56 /* ColonToken */, /*yieldContext*/ isGenerator, /*awaitContext*/ isAsync, /*requireCompleteParameterList*/ false, method);
+            method.body = parseFunctionBlockOrSemicolon(isGenerator, isAsync, diagnosticMessage);
+            return addJSDocComment(finishNode(method));
+        }
+        function parsePropertyDeclaration(fullStart, decorators, modifiers, name, questionToken) {
+            var property = createNode(149 /* PropertyDeclaration */, fullStart);
+            property.decorators = decorators;
+            property.modifiers = modifiers;
+            property.name = name;
+            property.questionToken = questionToken;
+            property.type = parseTypeAnnotation();
+            // For instance properties specifically, since they are evaluated inside the constructor,
+            // we do *not * want to parse yield expressions, so we specifically turn the yield context
+            // off. The grammar would look something like this:
+            //
+            //    MemberVariableDeclaration[Yield]:
+            //        AccessibilityModifier_opt   PropertyName   TypeAnnotation_opt   Initializer_opt[In];
+            //        AccessibilityModifier_opt  static_opt  PropertyName   TypeAnnotation_opt   Initializer_opt[In, ?Yield];
+            //
+            // The checker may still error in the static case to explicitly disallow the yield expression.
+            property.initializer = ts.hasModifier(property, 32 /* Static */)
+                ? allowInAnd(parseNonParameterInitializer)
+                : doOutsideOfContext(4096 /* YieldContext */ | 2048 /* DisallowInContext */, parseNonParameterInitializer);
+            parseSemicolon();
+            return addJSDocComment(finishNode(property));
+        }
+        function parsePropertyOrMethodDeclaration(fullStart, decorators, modifiers) {
+            var asteriskToken = parseOptionalToken(39 /* AsteriskToken */);
+            var name = parsePropertyName();
+            // Note: this is not legal as per the grammar.  But we allow it in the parser and
+            // report an error in the grammar checker.
+            var questionToken = parseOptionalToken(55 /* QuestionToken */);
+            if (asteriskToken || token() === 19 /* OpenParenToken */ || token() === 27 /* LessThanToken */) {
+                return parseMethodDeclaration(fullStart, decorators, modifiers, asteriskToken, name, questionToken, ts.Diagnostics.or_expected);
+            }
+            else {
+                return parsePropertyDeclaration(fullStart, decorators, modifiers, name, questionToken);
             }
-            var leftKind = getLiteralKindOfBinaryPlusOperand(node.left);
-            var literalKind = ts.isLiteralKind(leftKind)
-                && leftKind === getLiteralKindOfBinaryPlusOperand(node.right)
-                ? leftKind
-                : 0 /* Unknown */;
-            node.cachedLiteralKind = literalKind;
-            return literalKind;
         }
-        return 0 /* Unknown */;
-    }
-    /**
-     * Wraps an expression in parentheses if it is needed in order to use the expression
-     * as the expression of a NewExpression node.
-     *
-     * @param expression The Expression node.
-     */
-    function parenthesizeForNew(expression) {
-        var emittedExpression = skipPartiallyEmittedExpressions(expression);
-        switch (emittedExpression.kind) {
-            case 174 /* CallExpression */:
-                return createParen(expression);
-            case 175 /* NewExpression */:
-                return emittedExpression.arguments
-                    ? expression
-                    : createParen(expression);
+        function parseNonParameterInitializer() {
+            return parseInitializer(/*inParameter*/ false);
         }
-        return parenthesizeForAccess(expression);
-    }
-    ts.parenthesizeForNew = parenthesizeForNew;
-    /**
-     * Wraps an expression in parentheses if it is needed in order to use the expression for
-     * property or element access.
-     *
-     * @param expr The expression node.
-     */
-    function parenthesizeForAccess(expression) {
-        // isLeftHandSideExpression is almost the correct criterion for when it is not necessary
-        // to parenthesize the expression before a dot. The known exceptions are:
-        //
-        //    NewExpression:
-        //       new C.x        -> not the same as (new C).x
-        //    NumericLiteral
-        //       1.x            -> not the same as (1).x
-        //
-        var emittedExpression = skipPartiallyEmittedExpressions(expression);
-        if (ts.isLeftHandSideExpression(emittedExpression)
-            && (emittedExpression.kind !== 175 /* NewExpression */ || emittedExpression.arguments)
-            && emittedExpression.kind !== 8 /* NumericLiteral */) {
-            return expression;
+        function parseAccessorDeclaration(kind, fullStart, decorators, modifiers) {
+            var node = createNode(kind, fullStart);
+            node.decorators = decorators;
+            node.modifiers = modifiers;
+            node.name = parsePropertyName();
+            fillSignature(56 /* ColonToken */, /*yieldContext*/ false, /*awaitContext*/ false, /*requireCompleteParameterList*/ false, node);
+            node.body = parseFunctionBlockOrSemicolon(/*isGenerator*/ false, /*isAsync*/ false);
+            return addJSDocComment(finishNode(node));
         }
-        return createParen(expression, /*location*/ expression);
-    }
-    ts.parenthesizeForAccess = parenthesizeForAccess;
-    function parenthesizePostfixOperand(operand) {
-        return ts.isLeftHandSideExpression(operand)
-            ? operand
-            : createParen(operand, /*location*/ operand);
-    }
-    ts.parenthesizePostfixOperand = parenthesizePostfixOperand;
-    function parenthesizePrefixOperand(operand) {
-        return ts.isUnaryExpression(operand)
-            ? operand
-            : createParen(operand, /*location*/ operand);
-    }
-    ts.parenthesizePrefixOperand = parenthesizePrefixOperand;
-    function parenthesizeListElements(elements) {
-        var result;
-        for (var i = 0; i < elements.length; i++) {
-            var element = parenthesizeExpressionForList(elements[i]);
-            if (result !== undefined || element !== elements[i]) {
-                if (result === undefined) {
-                    result = elements.slice(0, i);
+        function isClassMemberModifier(idToken) {
+            switch (idToken) {
+                case 114 /* PublicKeyword */:
+                case 112 /* PrivateKeyword */:
+                case 113 /* ProtectedKeyword */:
+                case 115 /* StaticKeyword */:
+                case 131 /* ReadonlyKeyword */:
+                    return true;
+                default:
+                    return false;
+            }
+        }
+        function isClassMemberStart() {
+            var idToken;
+            if (token() === 57 /* AtToken */) {
+                return true;
+            }
+            // Eat up all modifiers, but hold on to the last one in case it is actually an identifier.
+            while (ts.isModifierKind(token())) {
+                idToken = token();
+                // If the idToken is a class modifier (protected, private, public, and static), it is
+                // certain that we are starting to parse class member. This allows better error recovery
+                // Example:
+                //      public foo() ...     // true
+                //      public @dec blah ... // true; we will then report an error later
+                //      export public ...    // true; we will then report an error later
+                if (isClassMemberModifier(idToken)) {
+                    return true;
+                }
+                nextToken();
+            }
+            if (token() === 39 /* AsteriskToken */) {
+                return true;
+            }
+            // Try to get the first property-like token following all modifiers.
+            // This can either be an identifier or the 'get' or 'set' keywords.
+            if (isLiteralPropertyName()) {
+                idToken = token();
+                nextToken();
+            }
+            // Index signatures and computed properties are class members; we can parse.
+            if (token() === 21 /* OpenBracketToken */) {
+                return true;
+            }
+            // If we were able to get any potential identifier...
+            if (idToken !== undefined) {
+                // If we have a non-keyword identifier, or if we have an accessor, then it's safe to parse.
+                if (!ts.isKeyword(idToken) || idToken === 135 /* SetKeyword */ || idToken === 125 /* GetKeyword */) {
+                    return true;
+                }
+                // If it *is* a keyword, but not an accessor, check a little farther along
+                // to see if it should actually be parsed as a class member.
+                switch (token()) {
+                    case 19 /* OpenParenToken */: // Method declaration
+                    case 27 /* LessThanToken */: // Generic Method declaration
+                    case 56 /* ColonToken */: // Type Annotation for declaration
+                    case 58 /* EqualsToken */: // Initializer for declaration
+                    case 55 /* QuestionToken */:
+                        return true;
+                    default:
+                        // Covers
+                        //  - Semicolons     (declaration termination)
+                        //  - Closing braces (end-of-class, must be declaration)
+                        //  - End-of-files   (not valid, but permitted so that it gets caught later on)
+                        //  - Line-breaks    (enabling *automatic semicolon insertion*)
+                        return canParseSemicolon();
                 }
-                result.push(element);
             }
+            return false;
         }
-        if (result !== undefined) {
-            return createNodeArray(result, elements, elements.hasTrailingComma);
-        }
-        return elements;
-    }
-    function parenthesizeExpressionForList(expression) {
-        var emittedExpression = skipPartiallyEmittedExpressions(expression);
-        var expressionPrecedence = ts.getExpressionPrecedence(emittedExpression);
-        var commaPrecedence = ts.getOperatorPrecedence(187 /* BinaryExpression */, 24 /* CommaToken */);
-        return expressionPrecedence > commaPrecedence
-            ? expression
-            : createParen(expression, /*location*/ expression);
-    }
-    ts.parenthesizeExpressionForList = parenthesizeExpressionForList;
-    function parenthesizeExpressionForExpressionStatement(expression) {
-        var emittedExpression = skipPartiallyEmittedExpressions(expression);
-        if (ts.isCallExpression(emittedExpression)) {
-            var callee = emittedExpression.expression;
-            var kind = skipPartiallyEmittedExpressions(callee).kind;
-            if (kind === 179 /* FunctionExpression */ || kind === 180 /* ArrowFunction */) {
-                var mutableCall = getMutableClone(emittedExpression);
-                mutableCall.expression = createParen(callee, /*location*/ callee);
-                return recreatePartiallyEmittedExpressions(expression, mutableCall);
+        function parseDecorators() {
+            var decorators;
+            while (true) {
+                var decoratorStart = getNodePos();
+                if (!parseOptional(57 /* AtToken */)) {
+                    break;
+                }
+                var decorator = createNode(147 /* Decorator */, decoratorStart);
+                decorator.expression = doInDecoratorContext(parseLeftHandSideExpressionOrHigher);
+                finishNode(decorator);
+                if (!decorators) {
+                    decorators = createNodeArray([decorator], decoratorStart);
+                }
+                else {
+                    decorators.push(decorator);
+                }
             }
-        }
-        else {
-            var leftmostExpressionKind = getLeftmostExpression(emittedExpression).kind;
-            if (leftmostExpressionKind === 171 /* ObjectLiteralExpression */ || leftmostExpressionKind === 179 /* FunctionExpression */) {
-                return createParen(expression, /*location*/ expression);
+            if (decorators) {
+                decorators.end = getNodeEnd();
             }
+            return decorators;
         }
-        return expression;
-    }
-    ts.parenthesizeExpressionForExpressionStatement = parenthesizeExpressionForExpressionStatement;
-    /**
-     * Clones a series of not-emitted expressions with a new inner expression.
-     *
-     * @param originalOuterExpression The original outer expression.
-     * @param newInnerExpression The new inner expression.
-     */
-    function recreatePartiallyEmittedExpressions(originalOuterExpression, newInnerExpression) {
-        if (ts.isPartiallyEmittedExpression(originalOuterExpression)) {
-            var clone_1 = getMutableClone(originalOuterExpression);
-            clone_1.expression = recreatePartiallyEmittedExpressions(clone_1.expression, newInnerExpression);
-            return clone_1;
-        }
-        return newInnerExpression;
-    }
-    function getLeftmostExpression(node) {
-        while (true) {
-            switch (node.kind) {
-                case 186 /* PostfixUnaryExpression */:
-                    node = node.operand;
-                    continue;
-                case 187 /* BinaryExpression */:
-                    node = node.left;
-                    continue;
-                case 188 /* ConditionalExpression */:
-                    node = node.condition;
-                    continue;
-                case 174 /* CallExpression */:
-                case 173 /* ElementAccessExpression */:
-                case 172 /* PropertyAccessExpression */:
-                    node = node.expression;
-                    continue;
-                case 288 /* PartiallyEmittedExpression */:
-                    node = node.expression;
-                    continue;
+        /*
+         * There are situations in which a modifier like 'const' will appear unexpectedly, such as on a class member.
+         * In those situations, if we are entirely sure that 'const' is not valid on its own (such as when ASI takes effect
+         * and turns it into a standalone declaration), then it is better to parse it and report an error later.
+         *
+         * In such situations, 'permitInvalidConstAsModifier' should be set to true.
+         */
+        function parseModifiers(permitInvalidConstAsModifier) {
+            var modifiers;
+            while (true) {
+                var modifierStart = scanner.getStartPos();
+                var modifierKind = token();
+                if (token() === 76 /* ConstKeyword */ && permitInvalidConstAsModifier) {
+                    // We need to ensure that any subsequent modifiers appear on the same line
+                    // so that when 'const' is a standalone declaration, we don't issue an error.
+                    if (!tryParse(nextTokenIsOnSameLineAndCanFollowModifier)) {
+                        break;
+                    }
+                }
+                else {
+                    if (!parseAnyContextualModifier()) {
+                        break;
+                    }
+                }
+                var modifier = finishNode(createNode(modifierKind, modifierStart));
+                if (!modifiers) {
+                    modifiers = createNodeArray([modifier], modifierStart);
+                }
+                else {
+                    modifiers.push(modifier);
+                }
             }
-            return node;
+            if (modifiers) {
+                modifiers.end = scanner.getStartPos();
+            }
+            return modifiers;
         }
-    }
-    function parenthesizeConciseBody(body) {
-        var emittedBody = skipPartiallyEmittedExpressions(body);
-        if (emittedBody.kind === 171 /* ObjectLiteralExpression */) {
-            return createParen(body, /*location*/ body);
+        function parseModifiersForArrowFunction() {
+            var modifiers;
+            if (token() === 120 /* AsyncKeyword */) {
+                var modifierStart = scanner.getStartPos();
+                var modifierKind = token();
+                nextToken();
+                var modifier = finishNode(createNode(modifierKind, modifierStart));
+                modifiers = createNodeArray([modifier], modifierStart);
+                modifiers.end = scanner.getStartPos();
+            }
+            return modifiers;
         }
-        return body;
-    }
-    ts.parenthesizeConciseBody = parenthesizeConciseBody;
-    (function (OuterExpressionKinds) {
-        OuterExpressionKinds[OuterExpressionKinds["Parentheses"] = 1] = "Parentheses";
-        OuterExpressionKinds[OuterExpressionKinds["Assertions"] = 2] = "Assertions";
-        OuterExpressionKinds[OuterExpressionKinds["PartiallyEmittedExpressions"] = 4] = "PartiallyEmittedExpressions";
-        OuterExpressionKinds[OuterExpressionKinds["All"] = 7] = "All";
-    })(ts.OuterExpressionKinds || (ts.OuterExpressionKinds = {}));
-    var OuterExpressionKinds = ts.OuterExpressionKinds;
-    function skipOuterExpressions(node, kinds) {
-        if (kinds === void 0) { kinds = 7 /* All */; }
-        var previousNode;
-        do {
-            previousNode = node;
-            if (kinds & 1 /* Parentheses */) {
-                node = skipParentheses(node);
+        function parseClassElement() {
+            if (token() === 25 /* SemicolonToken */) {
+                var result = createNode(206 /* SemicolonClassElement */);
+                nextToken();
+                return finishNode(result);
             }
-            if (kinds & 2 /* Assertions */) {
-                node = skipAssertions(node);
+            var fullStart = getNodePos();
+            var decorators = parseDecorators();
+            var modifiers = parseModifiers(/*permitInvalidConstAsModifier*/ true);
+            var accessor = tryParseAccessorDeclaration(fullStart, decorators, modifiers);
+            if (accessor) {
+                return accessor;
             }
-            if (kinds & 4 /* PartiallyEmittedExpressions */) {
-                node = skipPartiallyEmittedExpressions(node);
+            if (token() === 123 /* ConstructorKeyword */) {
+                return parseConstructorDeclaration(fullStart, decorators, modifiers);
             }
-        } while (previousNode !== node);
-        return node;
-    }
-    ts.skipOuterExpressions = skipOuterExpressions;
-    function skipParentheses(node) {
-        while (node.kind === 178 /* ParenthesizedExpression */) {
-            node = node.expression;
+            if (isIndexSignature()) {
+                return parseIndexSignatureDeclaration(fullStart, decorators, modifiers);
+            }
+            // It is very important that we check this *after* checking indexers because
+            // the [ token can start an index signature or a computed property name
+            if (ts.tokenIsIdentifierOrKeyword(token()) ||
+                token() === 9 /* StringLiteral */ ||
+                token() === 8 /* NumericLiteral */ ||
+                token() === 39 /* AsteriskToken */ ||
+                token() === 21 /* OpenBracketToken */) {
+                return parsePropertyOrMethodDeclaration(fullStart, decorators, modifiers);
+            }
+            if (decorators || modifiers) {
+                // treat this as a property declaration with a missing name.
+                var name_7 = createMissingNode(71 /* Identifier */, /*reportAtCurrentPosition*/ true, ts.Diagnostics.Declaration_expected);
+                return parsePropertyDeclaration(fullStart, decorators, modifiers, name_7, /*questionToken*/ undefined);
+            }
+            // 'isClassMemberStart' should have hinted not to attempt parsing.
+            ts.Debug.fail("Should not have attempted to parse class member declaration.");
         }
-        return node;
-    }
-    ts.skipParentheses = skipParentheses;
-    function skipAssertions(node) {
-        while (ts.isAssertionExpression(node)) {
-            node = node.expression;
+        function parseClassExpression() {
+            return parseClassDeclarationOrExpression(
+            /*fullStart*/ scanner.getStartPos(), 
+            /*decorators*/ undefined, 
+            /*modifiers*/ undefined, 199 /* ClassExpression */);
         }
-        return node;
-    }
-    ts.skipAssertions = skipAssertions;
-    function skipPartiallyEmittedExpressions(node) {
-        while (node.kind === 288 /* PartiallyEmittedExpression */) {
-            node = node.expression;
+        function parseClassDeclaration(fullStart, decorators, modifiers) {
+            return parseClassDeclarationOrExpression(fullStart, decorators, modifiers, 229 /* ClassDeclaration */);
         }
-        return node;
-    }
-    ts.skipPartiallyEmittedExpressions = skipPartiallyEmittedExpressions;
-    function startOnNewLine(node) {
-        node.startsOnNewLine = true;
-        return node;
-    }
-    ts.startOnNewLine = startOnNewLine;
-    function setOriginalNode(node, original) {
-        node.original = original;
-        if (original) {
-            var emitNode = original.emitNode;
-            if (emitNode)
-                node.emitNode = mergeEmitNode(emitNode, node.emitNode);
+        function parseClassDeclarationOrExpression(fullStart, decorators, modifiers, kind) {
+            var node = createNode(kind, fullStart);
+            node.decorators = decorators;
+            node.modifiers = modifiers;
+            parseExpected(75 /* ClassKeyword */);
+            node.name = parseNameOfClassDeclarationOrExpression();
+            node.typeParameters = parseTypeParameters();
+            node.heritageClauses = parseHeritageClauses();
+            if (parseExpected(17 /* OpenBraceToken */)) {
+                // ClassTail[Yield,Await] : (Modified) See 14.5
+                //      ClassHeritage[?Yield,?Await]opt { ClassBody[?Yield,?Await]opt }
+                node.members = parseClassMembers();
+                parseExpected(18 /* CloseBraceToken */);
+            }
+            else {
+                node.members = createMissingList();
+            }
+            return addJSDocComment(finishNode(node));
         }
-        return node;
-    }
-    ts.setOriginalNode = setOriginalNode;
-    function mergeEmitNode(sourceEmitNode, destEmitNode) {
-        var flags = sourceEmitNode.flags, commentRange = sourceEmitNode.commentRange, sourceMapRange = sourceEmitNode.sourceMapRange, tokenSourceMapRanges = sourceEmitNode.tokenSourceMapRanges;
-        if (!destEmitNode && (flags || commentRange || sourceMapRange || tokenSourceMapRanges))
-            destEmitNode = {};
-        if (flags)
-            destEmitNode.flags = flags;
-        if (commentRange)
-            destEmitNode.commentRange = commentRange;
-        if (sourceMapRange)
-            destEmitNode.sourceMapRange = sourceMapRange;
-        if (tokenSourceMapRanges)
-            destEmitNode.tokenSourceMapRanges = mergeTokenSourceMapRanges(tokenSourceMapRanges, destEmitNode.tokenSourceMapRanges);
-        return destEmitNode;
-    }
-    function mergeTokenSourceMapRanges(sourceRanges, destRanges) {
-        if (!destRanges)
-            destRanges = ts.createMap();
-        ts.copyProperties(sourceRanges, destRanges);
-        return destRanges;
-    }
-    /**
-     * Clears any EmitNode entries from parse-tree nodes.
-     * @param sourceFile A source file.
-     */
-    function disposeEmitNodes(sourceFile) {
-        // During transformation we may need to annotate a parse tree node with transient
-        // transformation properties. As parse tree nodes live longer than transformation
-        // nodes, we need to make sure we reclaim any memory allocated for custom ranges
-        // from these nodes to ensure we do not hold onto entire subtrees just for position
-        // information. We also need to reset these nodes to a pre-transformation state
-        // for incremental parsing scenarios so that we do not impact later emit.
-        sourceFile = ts.getSourceFileOfNode(ts.getParseTreeNode(sourceFile));
-        var emitNode = sourceFile && sourceFile.emitNode;
-        var annotatedNodes = emitNode && emitNode.annotatedNodes;
-        if (annotatedNodes) {
-            for (var _i = 0, annotatedNodes_1 = annotatedNodes; _i < annotatedNodes_1.length; _i++) {
-                var node = annotatedNodes_1[_i];
-                node.emitNode = undefined;
+        function parseNameOfClassDeclarationOrExpression() {
+            // implements is a future reserved word so
+            // 'class implements' might mean either
+            // - class expression with omitted name, 'implements' starts heritage clause
+            // - class with name 'implements'
+            // 'isImplementsClause' helps to disambiguate between these two cases
+            return isIdentifier() && !isImplementsClause()
+                ? parseIdentifier()
+                : undefined;
+        }
+        function isImplementsClause() {
+            return token() === 108 /* ImplementsKeyword */ && lookAhead(nextTokenIsIdentifierOrKeyword);
+        }
+        function parseHeritageClauses() {
+            // ClassTail[Yield,Await] : (Modified) See 14.5
+            //      ClassHeritage[?Yield,?Await]opt { ClassBody[?Yield,?Await]opt }
+            if (isHeritageClause()) {
+                return parseList(21 /* HeritageClauses */, parseHeritageClause);
             }
+            return undefined;
         }
-    }
-    ts.disposeEmitNodes = disposeEmitNodes;
-    /**
-     * Associates a node with the current transformation, initializing
-     * various transient transformation properties.
-     *
-     * @param node The node.
-     */
-    function getOrCreateEmitNode(node) {
-        if (!node.emitNode) {
-            if (ts.isParseTreeNode(node)) {
-                // To avoid holding onto transformation artifacts, we keep track of any
-                // parse tree node we are annotating. This allows us to clean them up after
-                // all transformations have completed.
-                if (node.kind === 256 /* SourceFile */) {
-                    return node.emitNode = { annotatedNodes: [node] };
-                }
-                var sourceFile = ts.getSourceFileOfNode(node);
-                getOrCreateEmitNode(sourceFile).annotatedNodes.push(node);
+        function parseHeritageClause() {
+            var tok = token();
+            if (tok === 85 /* ExtendsKeyword */ || tok === 108 /* ImplementsKeyword */) {
+                var node = createNode(259 /* HeritageClause */);
+                node.token = tok;
+                nextToken();
+                node.types = parseDelimitedList(7 /* HeritageClauseElement */, parseExpressionWithTypeArguments);
+                return finishNode(node);
             }
-            node.emitNode = {};
+            return undefined;
         }
-        return node.emitNode;
-    }
-    /**
-     * Gets flags that control emit behavior of a node.
-     *
-     * @param node The node.
-     */
-    function getEmitFlags(node) {
-        var emitNode = node.emitNode;
-        return emitNode && emitNode.flags;
-    }
-    ts.getEmitFlags = getEmitFlags;
-    /**
-     * Sets flags that control emit behavior of a node.
-     *
-     * @param node The node.
-     * @param emitFlags The NodeEmitFlags for the node.
-     */
-    function setEmitFlags(node, emitFlags) {
-        getOrCreateEmitNode(node).flags = emitFlags;
-        return node;
-    }
-    ts.setEmitFlags = setEmitFlags;
-    /**
-     * Sets a custom text range to use when emitting source maps.
-     *
-     * @param node The node.
-     * @param range The text range.
-     */
-    function setSourceMapRange(node, range) {
-        getOrCreateEmitNode(node).sourceMapRange = range;
-        return node;
-    }
-    ts.setSourceMapRange = setSourceMapRange;
-    /**
-     * Sets the TextRange to use for source maps for a token of a node.
-     *
-     * @param node The node.
-     * @param token The token.
-     * @param range The text range.
-     */
-    function setTokenSourceMapRange(node, token, range) {
-        var emitNode = getOrCreateEmitNode(node);
-        var tokenSourceMapRanges = emitNode.tokenSourceMapRanges || (emitNode.tokenSourceMapRanges = ts.createMap());
-        tokenSourceMapRanges[token] = range;
-        return node;
-    }
-    ts.setTokenSourceMapRange = setTokenSourceMapRange;
-    /**
-     * Sets a custom text range to use when emitting comments.
-     */
-    function setCommentRange(node, range) {
-        getOrCreateEmitNode(node).commentRange = range;
-        return node;
-    }
-    ts.setCommentRange = setCommentRange;
-    /**
-     * Gets a custom text range to use when emitting comments.
-     *
-     * @param node The node.
-     */
-    function getCommentRange(node) {
-        var emitNode = node.emitNode;
-        return (emitNode && emitNode.commentRange) || node;
-    }
-    ts.getCommentRange = getCommentRange;
-    /**
-     * Gets a custom text range to use when emitting source maps.
-     *
-     * @param node The node.
-     */
-    function getSourceMapRange(node) {
-        var emitNode = node.emitNode;
-        return (emitNode && emitNode.sourceMapRange) || node;
-    }
-    ts.getSourceMapRange = getSourceMapRange;
-    /**
-     * Gets the TextRange to use for source maps for a token of a node.
-     *
-     * @param node The node.
-     * @param token The token.
-     */
-    function getTokenSourceMapRange(node, token) {
-        var emitNode = node.emitNode;
-        var tokenSourceMapRanges = emitNode && emitNode.tokenSourceMapRanges;
-        return tokenSourceMapRanges && tokenSourceMapRanges[token];
-    }
-    ts.getTokenSourceMapRange = getTokenSourceMapRange;
-    /**
-     * Gets the constant value to emit for an expression.
-     */
-    function getConstantValue(node) {
-        var emitNode = node.emitNode;
-        return emitNode && emitNode.constantValue;
-    }
-    ts.getConstantValue = getConstantValue;
-    /**
-     * Sets the constant value to emit for an expression.
-     */
-    function setConstantValue(node, value) {
-        var emitNode = getOrCreateEmitNode(node);
-        emitNode.constantValue = value;
-        return node;
-    }
-    ts.setConstantValue = setConstantValue;
-    function setTextRange(node, location) {
-        if (location) {
-            node.pos = location.pos;
-            node.end = location.end;
+        function parseExpressionWithTypeArguments() {
+            var node = createNode(201 /* ExpressionWithTypeArguments */);
+            node.expression = parseLeftHandSideExpressionOrHigher();
+            if (token() === 27 /* LessThanToken */) {
+                node.typeArguments = parseBracketedList(19 /* TypeArguments */, parseType, 27 /* LessThanToken */, 29 /* GreaterThanToken */);
+            }
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.setTextRange = setTextRange;
-    function setNodeFlags(node, flags) {
-        node.flags = flags;
-        return node;
-    }
-    ts.setNodeFlags = setNodeFlags;
-    function setMultiLine(node, multiLine) {
-        node.multiLine = multiLine;
-        return node;
-    }
-    ts.setMultiLine = setMultiLine;
-    function setHasTrailingComma(nodes, hasTrailingComma) {
-        nodes.hasTrailingComma = hasTrailingComma;
-        return nodes;
-    }
-    ts.setHasTrailingComma = setHasTrailingComma;
-    /**
-     * Get the name of that target module from an import or export declaration
-     */
-    function getLocalNameForExternalImport(node, sourceFile) {
-        var namespaceDeclaration = ts.getNamespaceDeclarationNode(node);
-        if (namespaceDeclaration && !ts.isDefaultImport(node)) {
-            var name_9 = namespaceDeclaration.name;
-            return ts.isGeneratedIdentifier(name_9) ? name_9 : createIdentifier(ts.getSourceTextOfNodeFromSourceFile(sourceFile, namespaceDeclaration.name));
+        function isHeritageClause() {
+            return token() === 85 /* ExtendsKeyword */ || token() === 108 /* ImplementsKeyword */;
         }
-        if (node.kind === 230 /* ImportDeclaration */ && node.importClause) {
-            return getGeneratedNameForNode(node);
+        function parseClassMembers() {
+            return parseList(5 /* ClassMembers */, parseClassElement);
         }
-        if (node.kind === 236 /* ExportDeclaration */ && node.moduleSpecifier) {
-            return getGeneratedNameForNode(node);
+        function parseInterfaceDeclaration(fullStart, decorators, modifiers) {
+            var node = createNode(230 /* InterfaceDeclaration */, fullStart);
+            node.decorators = decorators;
+            node.modifiers = modifiers;
+            parseExpected(109 /* InterfaceKeyword */);
+            node.name = parseIdentifier();
+            node.typeParameters = parseTypeParameters();
+            node.heritageClauses = parseHeritageClauses();
+            node.members = parseObjectTypeMembers();
+            return addJSDocComment(finishNode(node));
         }
-        return undefined;
-    }
-    ts.getLocalNameForExternalImport = getLocalNameForExternalImport;
-    /**
-     * Get the name of a target module from an import/export declaration as should be written in the emitted output.
-     * The emitted output name can be different from the input if:
-     *  1. The module has a /// <amd-module name="<new name>" />
-     *  2. --out or --outFile is used, making the name relative to the rootDir
-     *  3- The containing SourceFile has an entry in renamedDependencies for the import as requested by some module loaders (e.g. System).
-     * Otherwise, a new StringLiteral node representing the module name will be returned.
-     */
-    function getExternalModuleNameLiteral(importNode, sourceFile, host, resolver, compilerOptions) {
-        var moduleName = ts.getExternalModuleName(importNode);
-        if (moduleName.kind === 9 /* StringLiteral */) {
-            return tryGetModuleNameFromDeclaration(importNode, host, resolver, compilerOptions)
-                || tryRenameExternalModule(moduleName, sourceFile)
-                || getSynthesizedClone(moduleName);
+        function parseTypeAliasDeclaration(fullStart, decorators, modifiers) {
+            var node = createNode(231 /* TypeAliasDeclaration */, fullStart);
+            node.decorators = decorators;
+            node.modifiers = modifiers;
+            parseExpected(138 /* TypeKeyword */);
+            node.name = parseIdentifier();
+            node.typeParameters = parseTypeParameters();
+            parseExpected(58 /* EqualsToken */);
+            node.type = parseType();
+            parseSemicolon();
+            return addJSDocComment(finishNode(node));
         }
-        return undefined;
-    }
-    ts.getExternalModuleNameLiteral = getExternalModuleNameLiteral;
-    /**
-     * Some bundlers (SystemJS builder) sometimes want to rename dependencies.
-     * Here we check if alternative name was provided for a given moduleName and return it if possible.
-     */
-    function tryRenameExternalModule(moduleName, sourceFile) {
-        if (sourceFile.renamedDependencies && ts.hasProperty(sourceFile.renamedDependencies, moduleName.text)) {
-            return createLiteral(sourceFile.renamedDependencies[moduleName.text]);
+        // In an ambient declaration, the grammar only allows integer literals as initializers.
+        // In a non-ambient declaration, the grammar allows uninitialized members only in a
+        // ConstantEnumMemberSection, which starts at the beginning of an enum declaration
+        // or any time an integer literal initializer is encountered.
+        function parseEnumMember() {
+            var node = createNode(264 /* EnumMember */, scanner.getStartPos());
+            node.name = parsePropertyName();
+            node.initializer = allowInAnd(parseNonParameterInitializer);
+            return addJSDocComment(finishNode(node));
         }
-        return undefined;
-    }
-    /**
-     * Get the name of a module as should be written in the emitted output.
-     * The emitted output name can be different from the input if:
-     *  1. The module has a /// <amd-module name="<new name>" />
-     *  2. --out or --outFile is used, making the name relative to the rootDir
-     * Otherwise, a new StringLiteral node representing the module name will be returned.
-     */
-    function tryGetModuleNameFromFile(file, host, options) {
-        if (!file) {
-            return undefined;
+        function parseEnumDeclaration(fullStart, decorators, modifiers) {
+            var node = createNode(232 /* EnumDeclaration */, fullStart);
+            node.decorators = decorators;
+            node.modifiers = modifiers;
+            parseExpected(83 /* EnumKeyword */);
+            node.name = parseIdentifier();
+            if (parseExpected(17 /* OpenBraceToken */)) {
+                node.members = parseDelimitedList(6 /* EnumMembers */, parseEnumMember);
+                parseExpected(18 /* CloseBraceToken */);
+            }
+            else {
+                node.members = createMissingList();
+            }
+            return addJSDocComment(finishNode(node));
         }
-        if (file.moduleName) {
-            return createLiteral(file.moduleName);
+        function parseModuleBlock() {
+            var node = createNode(234 /* ModuleBlock */, scanner.getStartPos());
+            if (parseExpected(17 /* OpenBraceToken */)) {
+                node.statements = parseList(1 /* BlockStatements */, parseStatement);
+                parseExpected(18 /* CloseBraceToken */);
+            }
+            else {
+                node.statements = createMissingList();
+            }
+            return finishNode(node);
         }
-        if (!ts.isDeclarationFile(file) && (options.out || options.outFile)) {
-            return createLiteral(ts.getExternalModuleNameFromPath(host, file.fileName));
+        function parseModuleOrNamespaceDeclaration(fullStart, decorators, modifiers, flags) {
+            var node = createNode(233 /* ModuleDeclaration */, fullStart);
+            // If we are parsing a dotted namespace name, we want to
+            // propagate the 'Namespace' flag across the names if set.
+            var namespaceFlag = flags & 16 /* Namespace */;
+            node.decorators = decorators;
+            node.modifiers = modifiers;
+            node.flags |= flags;
+            node.name = parseIdentifier();
+            node.body = parseOptional(23 /* DotToken */)
+                ? parseModuleOrNamespaceDeclaration(getNodePos(), /*decorators*/ undefined, /*modifiers*/ undefined, 4 /* NestedNamespace */ | namespaceFlag)
+                : parseModuleBlock();
+            return addJSDocComment(finishNode(node));
         }
-        return undefined;
-    }
-    ts.tryGetModuleNameFromFile = tryGetModuleNameFromFile;
-    function tryGetModuleNameFromDeclaration(declaration, host, resolver, compilerOptions) {
-        return tryGetModuleNameFromFile(resolver.getExternalModuleFileFromDeclaration(declaration), host, compilerOptions);
-    }
-})(ts || (ts = {}));
-/// <reference path="utilities.ts"/>
-/// <reference path="scanner.ts"/>
-/// <reference path="factory.ts"/>
-var ts;
-(function (ts) {
-    var NodeConstructor;
-    var TokenConstructor;
-    var IdentifierConstructor;
-    var SourceFileConstructor;
-    function createNode(kind, pos, end) {
-        if (kind === 256 /* SourceFile */) {
-            return new (SourceFileConstructor || (SourceFileConstructor = ts.objectAllocator.getSourceFileConstructor()))(kind, pos, end);
+        function parseAmbientExternalModuleDeclaration(fullStart, decorators, modifiers) {
+            var node = createNode(233 /* ModuleDeclaration */, fullStart);
+            node.decorators = decorators;
+            node.modifiers = modifiers;
+            if (token() === 141 /* GlobalKeyword */) {
+                // parse 'global' as name of global scope augmentation
+                node.name = parseIdentifier();
+                node.flags |= 512 /* GlobalAugmentation */;
+            }
+            else {
+                node.name = parseLiteralNode(/*internName*/ true);
+            }
+            if (token() === 17 /* OpenBraceToken */) {
+                node.body = parseModuleBlock();
+            }
+            else {
+                parseSemicolon();
+            }
+            return finishNode(node);
         }
-        else if (kind === 69 /* Identifier */) {
-            return new (IdentifierConstructor || (IdentifierConstructor = ts.objectAllocator.getIdentifierConstructor()))(kind, pos, end);
+        function parseModuleDeclaration(fullStart, decorators, modifiers) {
+            var flags = 0;
+            if (token() === 141 /* GlobalKeyword */) {
+                // global augmentation
+                return parseAmbientExternalModuleDeclaration(fullStart, decorators, modifiers);
+            }
+            else if (parseOptional(129 /* NamespaceKeyword */)) {
+                flags |= 16 /* Namespace */;
+            }
+            else {
+                parseExpected(128 /* ModuleKeyword */);
+                if (token() === 9 /* StringLiteral */) {
+                    return parseAmbientExternalModuleDeclaration(fullStart, decorators, modifiers);
+                }
+            }
+            return parseModuleOrNamespaceDeclaration(fullStart, decorators, modifiers, flags);
         }
-        else if (kind < 139 /* FirstNode */) {
-            return new (TokenConstructor || (TokenConstructor = ts.objectAllocator.getTokenConstructor()))(kind, pos, end);
+        function isExternalModuleReference() {
+            return token() === 132 /* RequireKeyword */ &&
+                lookAhead(nextTokenIsOpenParen);
         }
-        else {
-            return new (NodeConstructor || (NodeConstructor = ts.objectAllocator.getNodeConstructor()))(kind, pos, end);
+        function nextTokenIsOpenParen() {
+            return nextToken() === 19 /* OpenParenToken */;
         }
-    }
-    ts.createNode = createNode;
-    function visitNode(cbNode, node) {
-        if (node) {
-            return cbNode(node);
+        function nextTokenIsSlash() {
+            return nextToken() === 41 /* SlashToken */;
         }
-    }
-    function visitNodeArray(cbNodes, nodes) {
-        if (nodes) {
-            return cbNodes(nodes);
+        function parseNamespaceExportDeclaration(fullStart, decorators, modifiers) {
+            var exportDeclaration = createNode(236 /* NamespaceExportDeclaration */, fullStart);
+            exportDeclaration.decorators = decorators;
+            exportDeclaration.modifiers = modifiers;
+            parseExpected(118 /* AsKeyword */);
+            parseExpected(129 /* NamespaceKeyword */);
+            exportDeclaration.name = parseIdentifier();
+            parseSemicolon();
+            return finishNode(exportDeclaration);
         }
-    }
-    function visitEachNode(cbNode, nodes) {
-        if (nodes) {
-            for (var _i = 0, nodes_1 = nodes; _i < nodes_1.length; _i++) {
-                var node = nodes_1[_i];
-                var result = cbNode(node);
-                if (result) {
-                    return result;
+        function parseImportDeclarationOrImportEqualsDeclaration(fullStart, decorators, modifiers) {
+            parseExpected(91 /* ImportKeyword */);
+            var afterImportPos = scanner.getStartPos();
+            var identifier;
+            if (isIdentifier()) {
+                identifier = parseIdentifier();
+                if (token() !== 26 /* CommaToken */ && token() !== 140 /* FromKeyword */) {
+                    return parseImportEqualsDeclaration(fullStart, decorators, modifiers, identifier);
                 }
             }
+            // Import statement
+            var importDeclaration = createNode(238 /* ImportDeclaration */, fullStart);
+            importDeclaration.decorators = decorators;
+            importDeclaration.modifiers = modifiers;
+            // ImportDeclaration:
+            //  import ImportClause from ModuleSpecifier ;
+            //  import ModuleSpecifier;
+            if (identifier ||
+                token() === 39 /* AsteriskToken */ ||
+                token() === 17 /* OpenBraceToken */) {
+                importDeclaration.importClause = parseImportClause(identifier, afterImportPos);
+                parseExpected(140 /* FromKeyword */);
+            }
+            importDeclaration.moduleSpecifier = parseModuleSpecifier();
+            parseSemicolon();
+            return finishNode(importDeclaration);
         }
-    }
-    // Invokes a callback for each child of the given node. The 'cbNode' callback is invoked for all child nodes
-    // stored in properties. If a 'cbNodes' callback is specified, it is invoked for embedded arrays; otherwise,
-    // embedded arrays are flattened and the 'cbNode' callback is invoked for each element. If a callback returns
-    // a truthy value, iteration stops and that value is returned. Otherwise, undefined is returned.
-    function forEachChild(node, cbNode, cbNodeArray) {
-        if (!node) {
-            return;
+        function parseImportEqualsDeclaration(fullStart, decorators, modifiers, identifier) {
+            var importEqualsDeclaration = createNode(237 /* ImportEqualsDeclaration */, fullStart);
+            importEqualsDeclaration.decorators = decorators;
+            importEqualsDeclaration.modifiers = modifiers;
+            importEqualsDeclaration.name = identifier;
+            parseExpected(58 /* EqualsToken */);
+            importEqualsDeclaration.moduleReference = parseModuleReference();
+            parseSemicolon();
+            return addJSDocComment(finishNode(importEqualsDeclaration));
         }
-        // The visitXXX functions could be written as local functions that close over the cbNode and cbNodeArray
-        // callback parameters, but that causes a closure allocation for each invocation with noticeable effects
-        // on performance.
-        var visitNodes = cbNodeArray ? visitNodeArray : visitEachNode;
-        var cbNodes = cbNodeArray || cbNode;
-        switch (node.kind) {
-            case 139 /* QualifiedName */:
-                return visitNode(cbNode, node.left) ||
-                    visitNode(cbNode, node.right);
-            case 141 /* TypeParameter */:
-                return visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.constraint) ||
-                    visitNode(cbNode, node.expression);
-            case 254 /* ShorthandPropertyAssignment */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.questionToken) ||
-                    visitNode(cbNode, node.equalsToken) ||
-                    visitNode(cbNode, node.objectAssignmentInitializer);
-            case 142 /* Parameter */:
-            case 145 /* PropertyDeclaration */:
-            case 144 /* PropertySignature */:
-            case 253 /* PropertyAssignment */:
-            case 218 /* VariableDeclaration */:
-            case 169 /* BindingElement */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.propertyName) ||
-                    visitNode(cbNode, node.dotDotDotToken) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.questionToken) ||
-                    visitNode(cbNode, node.type) ||
-                    visitNode(cbNode, node.initializer);
-            case 156 /* FunctionType */:
-            case 157 /* ConstructorType */:
-            case 151 /* CallSignature */:
-            case 152 /* ConstructSignature */:
-            case 153 /* IndexSignature */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNodes(cbNodes, node.typeParameters) ||
-                    visitNodes(cbNodes, node.parameters) ||
-                    visitNode(cbNode, node.type);
-            case 147 /* MethodDeclaration */:
-            case 146 /* MethodSignature */:
-            case 148 /* Constructor */:
-            case 149 /* GetAccessor */:
-            case 150 /* SetAccessor */:
-            case 179 /* FunctionExpression */:
-            case 220 /* FunctionDeclaration */:
-            case 180 /* ArrowFunction */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.asteriskToken) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.questionToken) ||
-                    visitNodes(cbNodes, node.typeParameters) ||
-                    visitNodes(cbNodes, node.parameters) ||
-                    visitNode(cbNode, node.type) ||
-                    visitNode(cbNode, node.equalsGreaterThanToken) ||
-                    visitNode(cbNode, node.body);
-            case 155 /* TypeReference */:
-                return visitNode(cbNode, node.typeName) ||
-                    visitNodes(cbNodes, node.typeArguments);
-            case 154 /* TypePredicate */:
-                return visitNode(cbNode, node.parameterName) ||
-                    visitNode(cbNode, node.type);
-            case 158 /* TypeQuery */:
-                return visitNode(cbNode, node.exprName);
-            case 159 /* TypeLiteral */:
-                return visitNodes(cbNodes, node.members);
-            case 160 /* ArrayType */:
-                return visitNode(cbNode, node.elementType);
-            case 161 /* TupleType */:
-                return visitNodes(cbNodes, node.elementTypes);
-            case 162 /* UnionType */:
-            case 163 /* IntersectionType */:
-                return visitNodes(cbNodes, node.types);
-            case 164 /* ParenthesizedType */:
-                return visitNode(cbNode, node.type);
-            case 166 /* LiteralType */:
-                return visitNode(cbNode, node.literal);
-            case 167 /* ObjectBindingPattern */:
-            case 168 /* ArrayBindingPattern */:
-                return visitNodes(cbNodes, node.elements);
-            case 170 /* ArrayLiteralExpression */:
-                return visitNodes(cbNodes, node.elements);
-            case 171 /* ObjectLiteralExpression */:
-                return visitNodes(cbNodes, node.properties);
-            case 172 /* PropertyAccessExpression */:
-                return visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.name);
-            case 173 /* ElementAccessExpression */:
-                return visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.argumentExpression);
-            case 174 /* CallExpression */:
-            case 175 /* NewExpression */:
-                return visitNode(cbNode, node.expression) ||
-                    visitNodes(cbNodes, node.typeArguments) ||
-                    visitNodes(cbNodes, node.arguments);
-            case 176 /* TaggedTemplateExpression */:
-                return visitNode(cbNode, node.tag) ||
-                    visitNode(cbNode, node.template);
-            case 177 /* TypeAssertionExpression */:
-                return visitNode(cbNode, node.type) ||
-                    visitNode(cbNode, node.expression);
-            case 178 /* ParenthesizedExpression */:
-                return visitNode(cbNode, node.expression);
-            case 181 /* DeleteExpression */:
-                return visitNode(cbNode, node.expression);
-            case 182 /* TypeOfExpression */:
-                return visitNode(cbNode, node.expression);
-            case 183 /* VoidExpression */:
-                return visitNode(cbNode, node.expression);
-            case 185 /* PrefixUnaryExpression */:
-                return visitNode(cbNode, node.operand);
-            case 190 /* YieldExpression */:
-                return visitNode(cbNode, node.asteriskToken) ||
-                    visitNode(cbNode, node.expression);
-            case 184 /* AwaitExpression */:
-                return visitNode(cbNode, node.expression);
-            case 186 /* PostfixUnaryExpression */:
-                return visitNode(cbNode, node.operand);
-            case 187 /* BinaryExpression */:
-                return visitNode(cbNode, node.left) ||
-                    visitNode(cbNode, node.operatorToken) ||
-                    visitNode(cbNode, node.right);
-            case 195 /* AsExpression */:
-                return visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.type);
-            case 196 /* NonNullExpression */:
-                return visitNode(cbNode, node.expression);
-            case 188 /* ConditionalExpression */:
-                return visitNode(cbNode, node.condition) ||
-                    visitNode(cbNode, node.questionToken) ||
-                    visitNode(cbNode, node.whenTrue) ||
-                    visitNode(cbNode, node.colonToken) ||
-                    visitNode(cbNode, node.whenFalse);
-            case 191 /* SpreadElementExpression */:
-                return visitNode(cbNode, node.expression);
-            case 199 /* Block */:
-            case 226 /* ModuleBlock */:
-                return visitNodes(cbNodes, node.statements);
-            case 256 /* SourceFile */:
-                return visitNodes(cbNodes, node.statements) ||
-                    visitNode(cbNode, node.endOfFileToken);
-            case 200 /* VariableStatement */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.declarationList);
-            case 219 /* VariableDeclarationList */:
-                return visitNodes(cbNodes, node.declarations);
-            case 202 /* ExpressionStatement */:
-                return visitNode(cbNode, node.expression);
-            case 203 /* IfStatement */:
-                return visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.thenStatement) ||
-                    visitNode(cbNode, node.elseStatement);
-            case 204 /* DoStatement */:
-                return visitNode(cbNode, node.statement) ||
-                    visitNode(cbNode, node.expression);
-            case 205 /* WhileStatement */:
-                return visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.statement);
-            case 206 /* ForStatement */:
-                return visitNode(cbNode, node.initializer) ||
-                    visitNode(cbNode, node.condition) ||
-                    visitNode(cbNode, node.incrementor) ||
-                    visitNode(cbNode, node.statement);
-            case 207 /* ForInStatement */:
-                return visitNode(cbNode, node.initializer) ||
-                    visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.statement);
-            case 208 /* ForOfStatement */:
-                return visitNode(cbNode, node.initializer) ||
-                    visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.statement);
-            case 209 /* ContinueStatement */:
-            case 210 /* BreakStatement */:
-                return visitNode(cbNode, node.label);
-            case 211 /* ReturnStatement */:
-                return visitNode(cbNode, node.expression);
-            case 212 /* WithStatement */:
-                return visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.statement);
-            case 213 /* SwitchStatement */:
-                return visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.caseBlock);
-            case 227 /* CaseBlock */:
-                return visitNodes(cbNodes, node.clauses);
-            case 249 /* CaseClause */:
-                return visitNode(cbNode, node.expression) ||
-                    visitNodes(cbNodes, node.statements);
-            case 250 /* DefaultClause */:
-                return visitNodes(cbNodes, node.statements);
-            case 214 /* LabeledStatement */:
-                return visitNode(cbNode, node.label) ||
-                    visitNode(cbNode, node.statement);
-            case 215 /* ThrowStatement */:
-                return visitNode(cbNode, node.expression);
-            case 216 /* TryStatement */:
-                return visitNode(cbNode, node.tryBlock) ||
-                    visitNode(cbNode, node.catchClause) ||
-                    visitNode(cbNode, node.finallyBlock);
-            case 252 /* CatchClause */:
-                return visitNode(cbNode, node.variableDeclaration) ||
-                    visitNode(cbNode, node.block);
-            case 143 /* Decorator */:
-                return visitNode(cbNode, node.expression);
-            case 221 /* ClassDeclaration */:
-            case 192 /* ClassExpression */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNodes(cbNodes, node.typeParameters) ||
-                    visitNodes(cbNodes, node.heritageClauses) ||
-                    visitNodes(cbNodes, node.members);
-            case 222 /* InterfaceDeclaration */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNodes(cbNodes, node.typeParameters) ||
-                    visitNodes(cbNodes, node.heritageClauses) ||
-                    visitNodes(cbNodes, node.members);
-            case 223 /* TypeAliasDeclaration */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNodes(cbNodes, node.typeParameters) ||
-                    visitNode(cbNode, node.type);
-            case 224 /* EnumDeclaration */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNodes(cbNodes, node.members);
-            case 255 /* EnumMember */:
-                return visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.initializer);
-            case 225 /* ModuleDeclaration */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.body);
-            case 229 /* ImportEqualsDeclaration */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.moduleReference);
-            case 230 /* ImportDeclaration */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.importClause) ||
-                    visitNode(cbNode, node.moduleSpecifier);
-            case 231 /* ImportClause */:
-                return visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.namedBindings);
-            case 228 /* NamespaceExportDeclaration */:
-                return visitNode(cbNode, node.name);
-            case 232 /* NamespaceImport */:
-                return visitNode(cbNode, node.name);
-            case 233 /* NamedImports */:
-            case 237 /* NamedExports */:
-                return visitNodes(cbNodes, node.elements);
-            case 236 /* ExportDeclaration */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.exportClause) ||
-                    visitNode(cbNode, node.moduleSpecifier);
-            case 234 /* ImportSpecifier */:
-            case 238 /* ExportSpecifier */:
-                return visitNode(cbNode, node.propertyName) ||
-                    visitNode(cbNode, node.name);
-            case 235 /* ExportAssignment */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.expression);
-            case 189 /* TemplateExpression */:
-                return visitNode(cbNode, node.head) || visitNodes(cbNodes, node.templateSpans);
-            case 197 /* TemplateSpan */:
-                return visitNode(cbNode, node.expression) || visitNode(cbNode, node.literal);
-            case 140 /* ComputedPropertyName */:
-                return visitNode(cbNode, node.expression);
-            case 251 /* HeritageClause */:
-                return visitNodes(cbNodes, node.types);
-            case 194 /* ExpressionWithTypeArguments */:
-                return visitNode(cbNode, node.expression) ||
-                    visitNodes(cbNodes, node.typeArguments);
-            case 240 /* ExternalModuleReference */:
-                return visitNode(cbNode, node.expression);
-            case 239 /* MissingDeclaration */:
-                return visitNodes(cbNodes, node.decorators);
-            case 241 /* JsxElement */:
-                return visitNode(cbNode, node.openingElement) ||
-                    visitNodes(cbNodes, node.children) ||
-                    visitNode(cbNode, node.closingElement);
-            case 242 /* JsxSelfClosingElement */:
-            case 243 /* JsxOpeningElement */:
-                return visitNode(cbNode, node.tagName) ||
-                    visitNodes(cbNodes, node.attributes);
-            case 246 /* JsxAttribute */:
-                return visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.initializer);
-            case 247 /* JsxSpreadAttribute */:
-                return visitNode(cbNode, node.expression);
-            case 248 /* JsxExpression */:
-                return visitNode(cbNode, node.expression);
-            case 245 /* JsxClosingElement */:
-                return visitNode(cbNode, node.tagName);
-            case 257 /* JSDocTypeExpression */:
-                return visitNode(cbNode, node.type);
-            case 261 /* JSDocUnionType */:
-                return visitNodes(cbNodes, node.types);
-            case 262 /* JSDocTupleType */:
-                return visitNodes(cbNodes, node.types);
-            case 260 /* JSDocArrayType */:
-                return visitNode(cbNode, node.elementType);
-            case 264 /* JSDocNonNullableType */:
-                return visitNode(cbNode, node.type);
-            case 263 /* JSDocNullableType */:
-                return visitNode(cbNode, node.type);
-            case 265 /* JSDocRecordType */:
-                return visitNode(cbNode, node.literal);
-            case 267 /* JSDocTypeReference */:
-                return visitNode(cbNode, node.name) ||
-                    visitNodes(cbNodes, node.typeArguments);
-            case 268 /* JSDocOptionalType */:
-                return visitNode(cbNode, node.type);
-            case 269 /* JSDocFunctionType */:
-                return visitNodes(cbNodes, node.parameters) ||
-                    visitNode(cbNode, node.type);
-            case 270 /* JSDocVariadicType */:
-                return visitNode(cbNode, node.type);
-            case 271 /* JSDocConstructorType */:
-                return visitNode(cbNode, node.type);
-            case 272 /* JSDocThisType */:
-                return visitNode(cbNode, node.type);
-            case 266 /* JSDocRecordMember */:
-                return visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.type);
-            case 273 /* JSDocComment */:
-                return visitNodes(cbNodes, node.tags);
-            case 275 /* JSDocParameterTag */:
-                return visitNode(cbNode, node.preParameterName) ||
-                    visitNode(cbNode, node.typeExpression) ||
-                    visitNode(cbNode, node.postParameterName);
-            case 276 /* JSDocReturnTag */:
-                return visitNode(cbNode, node.typeExpression);
-            case 277 /* JSDocTypeTag */:
-                return visitNode(cbNode, node.typeExpression);
-            case 278 /* JSDocTemplateTag */:
-                return visitNodes(cbNodes, node.typeParameters);
-            case 279 /* JSDocTypedefTag */:
-                return visitNode(cbNode, node.typeExpression) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.jsDocTypeLiteral);
-            case 281 /* JSDocTypeLiteral */:
-                return visitNodes(cbNodes, node.jsDocPropertyTags);
-            case 280 /* JSDocPropertyTag */:
-                return visitNode(cbNode, node.typeExpression) ||
-                    visitNode(cbNode, node.name);
-            case 288 /* PartiallyEmittedExpression */:
-                return visitNode(cbNode, node.expression);
-            case 282 /* JSDocLiteralType */:
-                return visitNode(cbNode, node.literal);
+        function parseImportClause(identifier, fullStart) {
+            // ImportClause:
+            //  ImportedDefaultBinding
+            //  NameSpaceImport
+            //  NamedImports
+            //  ImportedDefaultBinding, NameSpaceImport
+            //  ImportedDefaultBinding, NamedImports
+            var importClause = createNode(239 /* ImportClause */, fullStart);
+            if (identifier) {
+                // ImportedDefaultBinding:
+                //  ImportedBinding
+                importClause.name = identifier;
+            }
+            // If there was no default import or if there is comma token after default import
+            // parse namespace or named imports
+            if (!importClause.name ||
+                parseOptional(26 /* CommaToken */)) {
+                importClause.namedBindings = token() === 39 /* AsteriskToken */ ? parseNamespaceImport() : parseNamedImportsOrExports(241 /* NamedImports */);
+            }
+            return finishNode(importClause);
         }
-    }
-    ts.forEachChild = forEachChild;
-    function createSourceFile(fileName, sourceText, languageVersion, setParentNodes, scriptKind) {
-        if (setParentNodes === void 0) { setParentNodes = false; }
-        ts.performance.mark("beforeParse");
-        var result = Parser.parseSourceFile(fileName, sourceText, languageVersion, /*syntaxCursor*/ undefined, setParentNodes, scriptKind);
-        ts.performance.mark("afterParse");
-        ts.performance.measure("Parse", "beforeParse", "afterParse");
-        return result;
-    }
-    ts.createSourceFile = createSourceFile;
-    function isExternalModule(file) {
-        return file.externalModuleIndicator !== undefined;
-    }
-    ts.isExternalModule = isExternalModule;
-    // Produces a new SourceFile for the 'newText' provided. The 'textChangeRange' parameter
-    // indicates what changed between the 'text' that this SourceFile has and the 'newText'.
-    // The SourceFile will be created with the compiler attempting to reuse as many nodes from
-    // this file as possible.
-    //
-    // Note: this function mutates nodes from this SourceFile. That means any existing nodes
-    // from this SourceFile that are being held onto may change as a result (including
-    // becoming detached from any SourceFile).  It is recommended that this SourceFile not
-    // be used once 'update' is called on it.
-    function updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks) {
-        return IncrementalParser.updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks);
-    }
-    ts.updateSourceFile = updateSourceFile;
-    /* @internal */
-    function parseIsolatedJSDocComment(content, start, length) {
-        var result = Parser.JSDocParser.parseIsolatedJSDocComment(content, start, length);
-        if (result && result.jsDoc) {
-            // because the jsDocComment was parsed out of the source file, it might
-            // not be covered by the fixupParentReferences.
-            Parser.fixupParentReferences(result.jsDoc);
+        function parseModuleReference() {
+            return isExternalModuleReference()
+                ? parseExternalModuleReference()
+                : parseEntityName(/*allowReservedWords*/ false);
         }
-        return result;
-    }
-    ts.parseIsolatedJSDocComment = parseIsolatedJSDocComment;
-    /* @internal */
-    // Exposed only for testing.
-    function parseJSDocTypeExpressionForTests(content, start, length) {
-        return Parser.JSDocParser.parseJSDocTypeExpressionForTests(content, start, length);
-    }
-    ts.parseJSDocTypeExpressionForTests = parseJSDocTypeExpressionForTests;
-    // Implement the parser as a singleton module.  We do this for perf reasons because creating
-    // parser instances can actually be expensive enough to impact us on projects with many source
-    // files.
-    var Parser;
-    (function (Parser) {
-        // Share a single scanner across all calls to parse a source file.  This helps speed things
-        // up by avoiding the cost of creating/compiling scanners over and over again.
-        var scanner = ts.createScanner(2 /* Latest */, /*skipTrivia*/ true);
-        var disallowInAndDecoratorContext = 32768 /* DisallowInContext */ | 131072 /* DecoratorContext */;
-        // capture constructors in 'initializeState' to avoid null checks
-        var NodeConstructor;
-        var TokenConstructor;
-        var IdentifierConstructor;
-        var SourceFileConstructor;
-        var sourceFile;
-        var parseDiagnostics;
-        var syntaxCursor;
-        var currentToken;
-        var sourceText;
-        var nodeCount;
-        var identifiers;
-        var identifierCount;
-        var parsingContext;
-        // Flags that dictate what parsing context we're in.  For example:
-        // Whether or not we are in strict parsing mode.  All that changes in strict parsing mode is
-        // that some tokens that would be considered identifiers may be considered keywords.
-        //
-        // When adding more parser context flags, consider which is the more common case that the
-        // flag will be in.  This should be the 'false' state for that flag.  The reason for this is
-        // that we don't store data in our nodes unless the value is in the *non-default* state.  So,
-        // for example, more often than code 'allows-in' (or doesn't 'disallow-in').  We opt for
-        // 'disallow-in' set to 'false'.  Otherwise, if we had 'allowsIn' set to 'true', then almost
-        // all nodes would need extra state on them to store this info.
-        //
-        // Note:  'allowIn' and 'allowYield' track 1:1 with the [in] and [yield] concepts in the ES6
-        // grammar specification.
-        //
-        // An important thing about these context concepts.  By default they are effectively inherited
-        // while parsing through every grammar production.  i.e. if you don't change them, then when
-        // you parse a sub-production, it will have the same context values as the parent production.
-        // This is great most of the time.  After all, consider all the 'expression' grammar productions
-        // and how nearly all of them pass along the 'in' and 'yield' context values:
-        //
-        // EqualityExpression[In, Yield] :
-        //      RelationalExpression[?In, ?Yield]
-        //      EqualityExpression[?In, ?Yield] == RelationalExpression[?In, ?Yield]
-        //      EqualityExpression[?In, ?Yield] != RelationalExpression[?In, ?Yield]
-        //      EqualityExpression[?In, ?Yield] === RelationalExpression[?In, ?Yield]
-        //      EqualityExpression[?In, ?Yield] !== RelationalExpression[?In, ?Yield]
-        //
-        // Where you have to be careful is then understanding what the points are in the grammar
-        // where the values are *not* passed along.  For example:
-        //
-        // SingleNameBinding[Yield,GeneratorParameter]
-        //      [+GeneratorParameter]BindingIdentifier[Yield] Initializer[In]opt
-        //      [~GeneratorParameter]BindingIdentifier[?Yield]Initializer[In, ?Yield]opt
-        //
-        // Here this is saying that if the GeneratorParameter context flag is set, that we should
-        // explicitly set the 'yield' context flag to false before calling into the BindingIdentifier
-        // and we should explicitly unset the 'yield' context flag before calling into the Initializer.
-        // production.  Conversely, if the GeneratorParameter context flag is not set, then we
-        // should leave the 'yield' context flag alone.
-        //
-        // Getting this all correct is tricky and requires careful reading of the grammar to
-        // understand when these values should be changed versus when they should be inherited.
-        //
-        // Note: it should not be necessary to save/restore these flags during speculative/lookahead
-        // parsing.  These context flags are naturally stored and restored through normal recursive
-        // descent parsing and unwinding.
-        var contextFlags;
-        // Whether or not we've had a parse error since creating the last AST node.  If we have
-        // encountered an error, it will be stored on the next AST node we create.  Parse errors
-        // can be broken down into three categories:
-        //
-        // 1) An error that occurred during scanning.  For example, an unterminated literal, or a
-        //    character that was completely not understood.
-        //
-        // 2) A token was expected, but was not present.  This type of error is commonly produced
-        //    by the 'parseExpected' function.
-        //
-        // 3) A token was present that no parsing function was able to consume.  This type of error
-        //    only occurs in the 'abortParsingListOrMoveToNextToken' function when the parser
-        //    decides to skip the token.
-        //
-        // In all of these cases, we want to mark the next node as having had an error before it.
-        // With this mark, we can know in incremental settings if this node can be reused, or if
-        // we have to reparse it.  If we don't keep this information around, we may just reuse the
-        // node.  in that event we would then not produce the same errors as we did before, causing
-        // significant confusion problems.
-        //
-        // Note: it is necessary that this value be saved/restored during speculative/lookahead
-        // parsing.  During lookahead parsing, we will often create a node.  That node will have
-        // this value attached, and then this value will be set back to 'false'.  If we decide to
-        // rewind, we must get back to the same value we had prior to the lookahead.
-        //
-        // Note: any errors at the end of the file that do not precede a regular node, should get
-        // attached to the EOF token.
-        var parseErrorBeforeNextFinishedNode = false;
-        function parseSourceFile(fileName, _sourceText, languageVersion, _syntaxCursor, setParentNodes, scriptKind) {
-            scriptKind = ts.ensureScriptKind(fileName, scriptKind);
-            initializeState(fileName, _sourceText, languageVersion, _syntaxCursor, scriptKind);
-            var result = parseSourceFileWorker(fileName, languageVersion, setParentNodes, scriptKind);
-            clearState();
-            return result;
+        function parseExternalModuleReference() {
+            var node = createNode(248 /* ExternalModuleReference */);
+            parseExpected(132 /* RequireKeyword */);
+            parseExpected(19 /* OpenParenToken */);
+            node.expression = parseModuleSpecifier();
+            parseExpected(20 /* CloseParenToken */);
+            return finishNode(node);
         }
-        Parser.parseSourceFile = parseSourceFile;
-        function getLanguageVariant(scriptKind) {
-            // .tsx and .jsx files are treated as jsx language variant.
-            return scriptKind === 4 /* TSX */ || scriptKind === 2 /* JSX */ || scriptKind === 1 /* JS */ ? 1 /* JSX */ : 0 /* Standard */;
+        function parseModuleSpecifier() {
+            if (token() === 9 /* StringLiteral */) {
+                var result = parseLiteralNode();
+                internIdentifier(result.text);
+                return result;
+            }
+            else {
+                // We allow arbitrary expressions here, even though the grammar only allows string
+                // literals.  We check to ensure that it is only a string literal later in the grammar
+                // check pass.
+                return parseExpression();
+            }
         }
-        function initializeState(fileName, _sourceText, languageVersion, _syntaxCursor, scriptKind) {
-            NodeConstructor = ts.objectAllocator.getNodeConstructor();
-            TokenConstructor = ts.objectAllocator.getTokenConstructor();
-            IdentifierConstructor = ts.objectAllocator.getIdentifierConstructor();
-            SourceFileConstructor = ts.objectAllocator.getSourceFileConstructor();
-            sourceText = _sourceText;
-            syntaxCursor = _syntaxCursor;
-            parseDiagnostics = [];
-            parsingContext = 0;
-            identifiers = ts.createMap();
-            identifierCount = 0;
-            nodeCount = 0;
-            contextFlags = scriptKind === 1 /* JS */ || scriptKind === 2 /* JSX */ ? 1048576 /* JavaScriptFile */ : 0 /* None */;
-            parseErrorBeforeNextFinishedNode = false;
-            // Initialize and prime the scanner before parsing the source elements.
-            scanner.setText(sourceText);
-            scanner.setOnError(scanError);
-            scanner.setScriptTarget(languageVersion);
-            scanner.setLanguageVariant(getLanguageVariant(scriptKind));
+        function parseNamespaceImport() {
+            // NameSpaceImport:
+            //  * as ImportedBinding
+            var namespaceImport = createNode(240 /* NamespaceImport */);
+            parseExpected(39 /* AsteriskToken */);
+            parseExpected(118 /* AsKeyword */);
+            namespaceImport.name = parseIdentifier();
+            return finishNode(namespaceImport);
+        }
+        function parseNamedImportsOrExports(kind) {
+            var node = createNode(kind);
+            // NamedImports:
+            //  { }
+            //  { ImportsList }
+            //  { ImportsList, }
+            // ImportsList:
+            //  ImportSpecifier
+            //  ImportsList, ImportSpecifier
+            node.elements = parseBracketedList(22 /* ImportOrExportSpecifiers */, kind === 241 /* NamedImports */ ? parseImportSpecifier : parseExportSpecifier, 17 /* OpenBraceToken */, 18 /* CloseBraceToken */);
+            return finishNode(node);
+        }
+        function parseExportSpecifier() {
+            return parseImportOrExportSpecifier(246 /* ExportSpecifier */);
         }
-        function clearState() {
-            // Clear out the text the scanner is pointing at, so it doesn't keep anything alive unnecessarily.
-            scanner.setText("");
-            scanner.setOnError(undefined);
-            // Clear any data.  We don't want to accidentally hold onto it for too long.
-            parseDiagnostics = undefined;
-            sourceFile = undefined;
-            identifiers = undefined;
-            syntaxCursor = undefined;
-            sourceText = undefined;
+        function parseImportSpecifier() {
+            return parseImportOrExportSpecifier(242 /* ImportSpecifier */);
         }
-        function parseSourceFileWorker(fileName, languageVersion, setParentNodes, scriptKind) {
-            sourceFile = createSourceFile(fileName, languageVersion, scriptKind);
-            sourceFile.flags = contextFlags;
-            // Prime the scanner.
-            nextToken();
-            processReferenceComments(sourceFile);
-            sourceFile.statements = parseList(0 /* SourceElements */, parseStatement);
-            ts.Debug.assert(token() === 1 /* EndOfFileToken */);
-            sourceFile.endOfFileToken = parseTokenNode();
-            setExternalModuleIndicator(sourceFile);
-            sourceFile.nodeCount = nodeCount;
-            sourceFile.identifierCount = identifierCount;
-            sourceFile.identifiers = identifiers;
-            sourceFile.parseDiagnostics = parseDiagnostics;
-            if (setParentNodes) {
-                fixupParentReferences(sourceFile);
+        function parseImportOrExportSpecifier(kind) {
+            var node = createNode(kind);
+            // ImportSpecifier:
+            //   BindingIdentifier
+            //   IdentifierName as BindingIdentifier
+            // ExportSpecifier:
+            //   IdentifierName
+            //   IdentifierName as IdentifierName
+            var checkIdentifierIsKeyword = ts.isKeyword(token()) && !isIdentifier();
+            var checkIdentifierStart = scanner.getTokenPos();
+            var checkIdentifierEnd = scanner.getTextPos();
+            var identifierName = parseIdentifierName();
+            if (token() === 118 /* AsKeyword */) {
+                node.propertyName = identifierName;
+                parseExpected(118 /* AsKeyword */);
+                checkIdentifierIsKeyword = ts.isKeyword(token()) && !isIdentifier();
+                checkIdentifierStart = scanner.getTokenPos();
+                checkIdentifierEnd = scanner.getTextPos();
+                node.name = parseIdentifierName();
             }
-            return sourceFile;
+            else {
+                node.name = identifierName;
+            }
+            if (kind === 242 /* ImportSpecifier */ && checkIdentifierIsKeyword) {
+                // Report error identifier expected
+                parseErrorAtPosition(checkIdentifierStart, checkIdentifierEnd - checkIdentifierStart, ts.Diagnostics.Identifier_expected);
+            }
+            return finishNode(node);
         }
-        function addJSDocComment(node) {
-            var comments = ts.getJsDocCommentsFromText(node, sourceFile.text);
-            if (comments) {
-                for (var _i = 0, comments_2 = comments; _i < comments_2.length; _i++) {
-                    var comment = comments_2[_i];
-                    var jsDoc = JSDocParser.parseJSDocComment(node, comment.pos, comment.end - comment.pos);
-                    if (!jsDoc) {
+        function parseExportDeclaration(fullStart, decorators, modifiers) {
+            var node = createNode(244 /* ExportDeclaration */, fullStart);
+            node.decorators = decorators;
+            node.modifiers = modifiers;
+            if (parseOptional(39 /* AsteriskToken */)) {
+                parseExpected(140 /* FromKeyword */);
+                node.moduleSpecifier = parseModuleSpecifier();
+            }
+            else {
+                node.exportClause = parseNamedImportsOrExports(245 /* NamedExports */);
+                // It is not uncommon to accidentally omit the 'from' keyword. Additionally, in editing scenarios,
+                // the 'from' keyword can be parsed as a named export when the export clause is unterminated (i.e. `export { from "moduleName";`)
+                // If we don't have a 'from' keyword, see if we have a string literal such that ASI won't take effect.
+                if (token() === 140 /* FromKeyword */ || (token() === 9 /* StringLiteral */ && !scanner.hasPrecedingLineBreak())) {
+                    parseExpected(140 /* FromKeyword */);
+                    node.moduleSpecifier = parseModuleSpecifier();
+                }
+            }
+            parseSemicolon();
+            return finishNode(node);
+        }
+        function parseExportAssignment(fullStart, decorators, modifiers) {
+            var node = createNode(243 /* ExportAssignment */, fullStart);
+            node.decorators = decorators;
+            node.modifiers = modifiers;
+            if (parseOptional(58 /* EqualsToken */)) {
+                node.isExportEquals = true;
+            }
+            else {
+                parseExpected(79 /* DefaultKeyword */);
+            }
+            node.expression = parseAssignmentExpressionOrHigher();
+            parseSemicolon();
+            return finishNode(node);
+        }
+        function processReferenceComments(sourceFile) {
+            var triviaScanner = ts.createScanner(sourceFile.languageVersion, /*skipTrivia*/ false, 0 /* Standard */, sourceText);
+            var referencedFiles = [];
+            var typeReferenceDirectives = [];
+            var amdDependencies = [];
+            var amdModuleName;
+            var checkJsDirective = undefined;
+            // Keep scanning all the leading trivia in the file until we get to something that
+            // isn't trivia.  Any single line comment will be analyzed to see if it is a
+            // reference comment.
+            while (true) {
+                var kind = triviaScanner.scan();
+                if (kind !== 2 /* SingleLineCommentTrivia */) {
+                    if (ts.isTrivia(kind)) {
                         continue;
                     }
-                    if (!node.jsDocComments) {
-                        node.jsDocComments = [];
+                    else {
+                        break;
+                    }
+                }
+                var range = {
+                    kind: triviaScanner.getToken(),
+                    pos: triviaScanner.getTokenPos(),
+                    end: triviaScanner.getTextPos(),
+                };
+                var comment = sourceText.substring(range.pos, range.end);
+                var referencePathMatchResult = ts.getFileReferenceFromReferencePath(comment, range);
+                if (referencePathMatchResult) {
+                    var fileReference = referencePathMatchResult.fileReference;
+                    sourceFile.hasNoDefaultLib = referencePathMatchResult.isNoDefaultLib;
+                    var diagnosticMessage = referencePathMatchResult.diagnosticMessage;
+                    if (fileReference) {
+                        if (referencePathMatchResult.isTypeReferenceDirective) {
+                            typeReferenceDirectives.push(fileReference);
+                        }
+                        else {
+                            referencedFiles.push(fileReference);
+                        }
+                    }
+                    if (diagnosticMessage) {
+                        parseDiagnostics.push(ts.createFileDiagnostic(sourceFile, range.pos, range.end - range.pos, diagnosticMessage));
+                    }
+                }
+                else {
+                    var amdModuleNameRegEx = /^\/\/\/\s*<amd-module\s+name\s*=\s*('|")(.+?)\1/gim;
+                    var amdModuleNameMatchResult = amdModuleNameRegEx.exec(comment);
+                    if (amdModuleNameMatchResult) {
+                        if (amdModuleName) {
+                            parseDiagnostics.push(ts.createFileDiagnostic(sourceFile, range.pos, range.end - range.pos, ts.Diagnostics.An_AMD_module_cannot_have_multiple_name_assignments));
+                        }
+                        amdModuleName = amdModuleNameMatchResult[2];
+                    }
+                    var amdDependencyRegEx = /^\/\/\/\s*<amd-dependency\s/gim;
+                    var pathRegex = /\spath\s*=\s*('|")(.+?)\1/gim;
+                    var nameRegex = /\sname\s*=\s*('|")(.+?)\1/gim;
+                    var amdDependencyMatchResult = amdDependencyRegEx.exec(comment);
+                    if (amdDependencyMatchResult) {
+                        var pathMatchResult = pathRegex.exec(comment);
+                        var nameMatchResult = nameRegex.exec(comment);
+                        if (pathMatchResult) {
+                            var amdDependency = { path: pathMatchResult[2], name: nameMatchResult ? nameMatchResult[2] : undefined };
+                            amdDependencies.push(amdDependency);
+                        }
+                    }
+                    var checkJsDirectiveRegEx = /^\/\/\/?\s*(@ts-check|@ts-nocheck)\s*$/gim;
+                    var checkJsDirectiveMatchResult = checkJsDirectiveRegEx.exec(comment);
+                    if (checkJsDirectiveMatchResult) {
+                        checkJsDirective = {
+                            enabled: ts.compareStrings(checkJsDirectiveMatchResult[1], "@ts-check", /*ignoreCase*/ true) === 0 /* EqualTo */,
+                            end: range.end,
+                            pos: range.pos
+                        };
+                    }
+                }
+            }
+            sourceFile.referencedFiles = referencedFiles;
+            sourceFile.typeReferenceDirectives = typeReferenceDirectives;
+            sourceFile.amdDependencies = amdDependencies;
+            sourceFile.moduleName = amdModuleName;
+            sourceFile.checkJsDirective = checkJsDirective;
+        }
+        function setExternalModuleIndicator(sourceFile) {
+            sourceFile.externalModuleIndicator = ts.forEach(sourceFile.statements, function (node) {
+                return ts.hasModifier(node, 1 /* Export */)
+                    || node.kind === 237 /* ImportEqualsDeclaration */ && node.moduleReference.kind === 248 /* ExternalModuleReference */
+                    || node.kind === 238 /* ImportDeclaration */
+                    || node.kind === 243 /* ExportAssignment */
+                    || node.kind === 244 /* ExportDeclaration */
+                    ? node
+                    : undefined;
+            });
+        }
+        var ParsingContext;
+        (function (ParsingContext) {
+            ParsingContext[ParsingContext["SourceElements"] = 0] = "SourceElements";
+            ParsingContext[ParsingContext["BlockStatements"] = 1] = "BlockStatements";
+            ParsingContext[ParsingContext["SwitchClauses"] = 2] = "SwitchClauses";
+            ParsingContext[ParsingContext["SwitchClauseStatements"] = 3] = "SwitchClauseStatements";
+            ParsingContext[ParsingContext["TypeMembers"] = 4] = "TypeMembers";
+            ParsingContext[ParsingContext["ClassMembers"] = 5] = "ClassMembers";
+            ParsingContext[ParsingContext["EnumMembers"] = 6] = "EnumMembers";
+            ParsingContext[ParsingContext["HeritageClauseElement"] = 7] = "HeritageClauseElement";
+            ParsingContext[ParsingContext["VariableDeclarations"] = 8] = "VariableDeclarations";
+            ParsingContext[ParsingContext["ObjectBindingElements"] = 9] = "ObjectBindingElements";
+            ParsingContext[ParsingContext["ArrayBindingElements"] = 10] = "ArrayBindingElements";
+            ParsingContext[ParsingContext["ArgumentExpressions"] = 11] = "ArgumentExpressions";
+            ParsingContext[ParsingContext["ObjectLiteralMembers"] = 12] = "ObjectLiteralMembers";
+            ParsingContext[ParsingContext["JsxAttributes"] = 13] = "JsxAttributes";
+            ParsingContext[ParsingContext["JsxChildren"] = 14] = "JsxChildren";
+            ParsingContext[ParsingContext["ArrayLiteralMembers"] = 15] = "ArrayLiteralMembers";
+            ParsingContext[ParsingContext["Parameters"] = 16] = "Parameters";
+            ParsingContext[ParsingContext["RestProperties"] = 17] = "RestProperties";
+            ParsingContext[ParsingContext["TypeParameters"] = 18] = "TypeParameters";
+            ParsingContext[ParsingContext["TypeArguments"] = 19] = "TypeArguments";
+            ParsingContext[ParsingContext["TupleElementTypes"] = 20] = "TupleElementTypes";
+            ParsingContext[ParsingContext["HeritageClauses"] = 21] = "HeritageClauses";
+            ParsingContext[ParsingContext["ImportOrExportSpecifiers"] = 22] = "ImportOrExportSpecifiers";
+            ParsingContext[ParsingContext["JSDocFunctionParameters"] = 23] = "JSDocFunctionParameters";
+            ParsingContext[ParsingContext["JSDocTypeArguments"] = 24] = "JSDocTypeArguments";
+            ParsingContext[ParsingContext["JSDocRecordMembers"] = 25] = "JSDocRecordMembers";
+            ParsingContext[ParsingContext["JSDocTupleTypes"] = 26] = "JSDocTupleTypes";
+            ParsingContext[ParsingContext["Count"] = 27] = "Count"; // Number of parsing contexts
+        })(ParsingContext || (ParsingContext = {}));
+        var Tristate;
+        (function (Tristate) {
+            Tristate[Tristate["False"] = 0] = "False";
+            Tristate[Tristate["True"] = 1] = "True";
+            Tristate[Tristate["Unknown"] = 2] = "Unknown";
+        })(Tristate || (Tristate = {}));
+        var JSDocParser;
+        (function (JSDocParser) {
+            function isJSDocType() {
+                switch (token()) {
+                    case 39 /* AsteriskToken */:
+                    case 55 /* QuestionToken */:
+                    case 19 /* OpenParenToken */:
+                    case 21 /* OpenBracketToken */:
+                    case 51 /* ExclamationToken */:
+                    case 17 /* OpenBraceToken */:
+                    case 89 /* FunctionKeyword */:
+                    case 24 /* DotDotDotToken */:
+                    case 94 /* NewKeyword */:
+                    case 99 /* ThisKeyword */:
+                        return true;
+                }
+                return ts.tokenIsIdentifierOrKeyword(token());
+            }
+            JSDocParser.isJSDocType = isJSDocType;
+            function parseJSDocTypeExpressionForTests(content, start, length) {
+                initializeState(content, 5 /* Latest */, /*_syntaxCursor:*/ undefined, 1 /* JS */);
+                sourceFile = createSourceFile("file.js", 5 /* Latest */, 1 /* JS */);
+                scanner.setText(content, start, length);
+                currentToken = scanner.scan();
+                var jsDocTypeExpression = parseJSDocTypeExpression();
+                var diagnostics = parseDiagnostics;
+                clearState();
+                return jsDocTypeExpression ? { jsDocTypeExpression: jsDocTypeExpression, diagnostics: diagnostics } : undefined;
+            }
+            JSDocParser.parseJSDocTypeExpressionForTests = parseJSDocTypeExpressionForTests;
+            // Parses out a JSDoc type expression.
+            /* @internal */
+            function parseJSDocTypeExpression() {
+                var result = createNode(267 /* JSDocTypeExpression */, scanner.getTokenPos());
+                parseExpected(17 /* OpenBraceToken */);
+                result.type = parseJSDocTopLevelType();
+                parseExpected(18 /* CloseBraceToken */);
+                fixupParentReferences(result);
+                return finishNode(result);
+            }
+            JSDocParser.parseJSDocTypeExpression = parseJSDocTypeExpression;
+            function parseJSDocTopLevelType() {
+                var type = parseJSDocType();
+                if (token() === 49 /* BarToken */) {
+                    var unionType = createNode(271 /* JSDocUnionType */, type.pos);
+                    unionType.types = parseJSDocTypeList(type);
+                    type = finishNode(unionType);
+                }
+                if (token() === 58 /* EqualsToken */) {
+                    var optionalType = createNode(278 /* JSDocOptionalType */, type.pos);
+                    nextToken();
+                    optionalType.type = type;
+                    type = finishNode(optionalType);
+                }
+                return type;
+            }
+            function parseJSDocType() {
+                var type = parseBasicTypeExpression();
+                while (true) {
+                    if (token() === 21 /* OpenBracketToken */) {
+                        var arrayType = createNode(270 /* JSDocArrayType */, type.pos);
+                        arrayType.elementType = type;
+                        nextToken();
+                        parseExpected(22 /* CloseBracketToken */);
+                        type = finishNode(arrayType);
+                    }
+                    else if (token() === 55 /* QuestionToken */) {
+                        var nullableType = createNode(273 /* JSDocNullableType */, type.pos);
+                        nullableType.type = type;
+                        nextToken();
+                        type = finishNode(nullableType);
+                    }
+                    else if (token() === 51 /* ExclamationToken */) {
+                        var nonNullableType = createNode(274 /* JSDocNonNullableType */, type.pos);
+                        nonNullableType.type = type;
+                        nextToken();
+                        type = finishNode(nonNullableType);
+                    }
+                    else {
+                        break;
+                    }
+                }
+                return type;
+            }
+            function parseBasicTypeExpression() {
+                switch (token()) {
+                    case 39 /* AsteriskToken */:
+                        return parseJSDocAllType();
+                    case 55 /* QuestionToken */:
+                        return parseJSDocUnknownOrNullableType();
+                    case 19 /* OpenParenToken */:
+                        return parseJSDocUnionType();
+                    case 21 /* OpenBracketToken */:
+                        return parseJSDocTupleType();
+                    case 51 /* ExclamationToken */:
+                        return parseJSDocNonNullableType();
+                    case 17 /* OpenBraceToken */:
+                        return parseJSDocRecordType();
+                    case 89 /* FunctionKeyword */:
+                        if (lookAhead(nextTokenIsOpenParen)) {
+                            return parseJSDocFunctionType();
+                        }
+                        break;
+                    case 24 /* DotDotDotToken */:
+                        return parseJSDocVariadicType();
+                    case 94 /* NewKeyword */:
+                        return parseJSDocConstructorType();
+                    case 99 /* ThisKeyword */:
+                        return parseJSDocThisType();
+                    case 119 /* AnyKeyword */:
+                    case 136 /* StringKeyword */:
+                    case 133 /* NumberKeyword */:
+                    case 122 /* BooleanKeyword */:
+                    case 137 /* SymbolKeyword */:
+                    case 105 /* VoidKeyword */:
+                    case 95 /* NullKeyword */:
+                    case 139 /* UndefinedKeyword */:
+                    case 130 /* NeverKeyword */:
+                        return parseTokenNode();
+                    case 9 /* StringLiteral */:
+                    case 8 /* NumericLiteral */:
+                    case 101 /* TrueKeyword */:
+                    case 86 /* FalseKeyword */:
+                        return parseJSDocLiteralType();
+                }
+                return parseJSDocTypeReference();
+            }
+            function parseJSDocThisType() {
+                var result = createNode(282 /* JSDocThisType */);
+                nextToken();
+                parseExpected(56 /* ColonToken */);
+                result.type = parseJSDocType();
+                return finishNode(result);
+            }
+            function parseJSDocConstructorType() {
+                var result = createNode(281 /* JSDocConstructorType */);
+                nextToken();
+                parseExpected(56 /* ColonToken */);
+                result.type = parseJSDocType();
+                return finishNode(result);
+            }
+            function parseJSDocVariadicType() {
+                var result = createNode(280 /* JSDocVariadicType */);
+                nextToken();
+                result.type = parseJSDocType();
+                return finishNode(result);
+            }
+            function parseJSDocFunctionType() {
+                var result = createNode(279 /* JSDocFunctionType */);
+                nextToken();
+                parseExpected(19 /* OpenParenToken */);
+                result.parameters = parseDelimitedList(23 /* JSDocFunctionParameters */, parseJSDocParameter);
+                checkForTrailingComma(result.parameters);
+                parseExpected(20 /* CloseParenToken */);
+                if (token() === 56 /* ColonToken */) {
+                    nextToken();
+                    result.type = parseJSDocType();
+                }
+                return finishNode(result);
+            }
+            function parseJSDocParameter() {
+                var parameter = createNode(146 /* Parameter */);
+                parameter.type = parseJSDocType();
+                if (parseOptional(58 /* EqualsToken */)) {
+                    // TODO(rbuckton): Can this be changed to SyntaxKind.QuestionToken?
+                    parameter.questionToken = createNode(58 /* EqualsToken */);
+                }
+                return finishNode(parameter);
+            }
+            function parseJSDocTypeReference() {
+                var result = createNode(277 /* JSDocTypeReference */);
+                result.name = parseSimplePropertyName();
+                if (token() === 27 /* LessThanToken */) {
+                    result.typeArguments = parseTypeArguments();
+                }
+                else {
+                    while (parseOptional(23 /* DotToken */)) {
+                        if (token() === 27 /* LessThanToken */) {
+                            result.typeArguments = parseTypeArguments();
+                            break;
+                        }
+                        else {
+                            result.name = parseQualifiedName(result.name);
+                        }
+                    }
+                }
+                return finishNode(result);
+            }
+            function parseTypeArguments() {
+                // Move past the <
+                nextToken();
+                var typeArguments = parseDelimitedList(24 /* JSDocTypeArguments */, parseJSDocType);
+                checkForTrailingComma(typeArguments);
+                checkForEmptyTypeArgumentList(typeArguments);
+                parseExpected(29 /* GreaterThanToken */);
+                return typeArguments;
+            }
+            function checkForEmptyTypeArgumentList(typeArguments) {
+                if (parseDiagnostics.length === 0 && typeArguments && typeArguments.length === 0) {
+                    var start = typeArguments.pos - "<".length;
+                    var end = ts.skipTrivia(sourceText, typeArguments.end) + ">".length;
+                    return parseErrorAtPosition(start, end - start, ts.Diagnostics.Type_argument_list_cannot_be_empty);
+                }
+            }
+            function parseQualifiedName(left) {
+                var result = createNode(143 /* QualifiedName */, left.pos);
+                result.left = left;
+                result.right = parseIdentifierName();
+                return finishNode(result);
+            }
+            function parseJSDocRecordType() {
+                var result = createNode(275 /* JSDocRecordType */);
+                result.literal = parseTypeLiteral();
+                return finishNode(result);
+            }
+            function parseJSDocNonNullableType() {
+                var result = createNode(274 /* JSDocNonNullableType */);
+                nextToken();
+                result.type = parseJSDocType();
+                return finishNode(result);
+            }
+            function parseJSDocTupleType() {
+                var result = createNode(272 /* JSDocTupleType */);
+                nextToken();
+                result.types = parseDelimitedList(26 /* JSDocTupleTypes */, parseJSDocType);
+                checkForTrailingComma(result.types);
+                parseExpected(22 /* CloseBracketToken */);
+                return finishNode(result);
+            }
+            function checkForTrailingComma(list) {
+                if (parseDiagnostics.length === 0 && list.hasTrailingComma) {
+                    var start = list.end - ",".length;
+                    parseErrorAtPosition(start, ",".length, ts.Diagnostics.Trailing_comma_not_allowed);
+                }
+            }
+            function parseJSDocUnionType() {
+                var result = createNode(271 /* JSDocUnionType */);
+                nextToken();
+                result.types = parseJSDocTypeList(parseJSDocType());
+                parseExpected(20 /* CloseParenToken */);
+                return finishNode(result);
+            }
+            function parseJSDocTypeList(firstType) {
+                ts.Debug.assert(!!firstType);
+                var types = createNodeArray([firstType], firstType.pos);
+                while (parseOptional(49 /* BarToken */)) {
+                    types.push(parseJSDocType());
+                }
+                types.end = scanner.getStartPos();
+                return types;
+            }
+            function parseJSDocAllType() {
+                var result = createNode(268 /* JSDocAllType */);
+                nextToken();
+                return finishNode(result);
+            }
+            function parseJSDocLiteralType() {
+                var result = createNode(294 /* JSDocLiteralType */);
+                result.literal = parseLiteralTypeNode();
+                return finishNode(result);
+            }
+            function parseJSDocUnknownOrNullableType() {
+                var pos = scanner.getStartPos();
+                // skip the ?
+                nextToken();
+                // Need to lookahead to decide if this is a nullable or unknown type.
+                // Here are cases where we'll pick the unknown type:
+                //
+                //      Foo(?,
+                //      { a: ? }
+                //      Foo(?)
+                //      Foo<?>
+                //      Foo(?=
+                //      (?|
+                if (token() === 26 /* CommaToken */ ||
+                    token() === 18 /* CloseBraceToken */ ||
+                    token() === 20 /* CloseParenToken */ ||
+                    token() === 29 /* GreaterThanToken */ ||
+                    token() === 58 /* EqualsToken */ ||
+                    token() === 49 /* BarToken */) {
+                    var result = createNode(269 /* JSDocUnknownType */, pos);
+                    return finishNode(result);
+                }
+                else {
+                    var result = createNode(273 /* JSDocNullableType */, pos);
+                    result.type = parseJSDocType();
+                    return finishNode(result);
+                }
+            }
+            function parseIsolatedJSDocComment(content, start, length) {
+                initializeState(content, 5 /* Latest */, /*_syntaxCursor:*/ undefined, 1 /* JS */);
+                sourceFile = { languageVariant: 0 /* Standard */, text: content };
+                var jsDoc = parseJSDocCommentWorker(start, length);
+                var diagnostics = parseDiagnostics;
+                clearState();
+                return jsDoc ? { jsDoc: jsDoc, diagnostics: diagnostics } : undefined;
+            }
+            JSDocParser.parseIsolatedJSDocComment = parseIsolatedJSDocComment;
+            function parseJSDocComment(parent, start, length) {
+                var saveToken = currentToken;
+                var saveParseDiagnosticsLength = parseDiagnostics.length;
+                var saveParseErrorBeforeNextFinishedNode = parseErrorBeforeNextFinishedNode;
+                var comment = parseJSDocCommentWorker(start, length);
+                if (comment) {
+                    comment.parent = parent;
+                }
+                if (ts.isInJavaScriptFile(parent)) {
+                    if (!sourceFile.jsDocDiagnostics) {
+                        sourceFile.jsDocDiagnostics = [];
+                    }
+                    (_a = sourceFile.jsDocDiagnostics).push.apply(_a, parseDiagnostics);
+                }
+                currentToken = saveToken;
+                parseDiagnostics.length = saveParseDiagnosticsLength;
+                parseErrorBeforeNextFinishedNode = saveParseErrorBeforeNextFinishedNode;
+                return comment;
+                var _a;
+            }
+            JSDocParser.parseJSDocComment = parseJSDocComment;
+            var JSDocState;
+            (function (JSDocState) {
+                JSDocState[JSDocState["BeginningOfLine"] = 0] = "BeginningOfLine";
+                JSDocState[JSDocState["SawAsterisk"] = 1] = "SawAsterisk";
+                JSDocState[JSDocState["SavingComments"] = 2] = "SavingComments";
+            })(JSDocState || (JSDocState = {}));
+            function parseJSDocCommentWorker(start, length) {
+                var content = sourceText;
+                start = start || 0;
+                var end = length === undefined ? content.length : start + length;
+                length = end - start;
+                ts.Debug.assert(start >= 0);
+                ts.Debug.assert(start <= end);
+                ts.Debug.assert(end <= content.length);
+                var tags;
+                var comments = [];
+                var result;
+                // Check for /** (JSDoc opening part)
+                if (!isJsDocStart(content, start)) {
+                    return result;
+                }
+                // + 3 for leading /**, - 5 in total for /** */
+                scanner.scanRange(start + 3, length - 5, function () {
+                    // Initially we can parse out a tag.  We also have seen a starting asterisk.
+                    // This is so that /** * @type */ doesn't parse.
+                    var advanceToken = true;
+                    var state = 1 /* SawAsterisk */;
+                    var margin = undefined;
+                    // + 4 for leading '/** '
+                    var indent = start - Math.max(content.lastIndexOf("\n", start), 0) + 4;
+                    function pushComment(text) {
+                        if (!margin) {
+                            margin = indent;
+                        }
+                        comments.push(text);
+                        indent += text.length;
+                    }
+                    nextJSDocToken();
+                    while (token() === 5 /* WhitespaceTrivia */) {
+                        nextJSDocToken();
+                    }
+                    if (token() === 4 /* NewLineTrivia */) {
+                        state = 0 /* BeginningOfLine */;
+                        indent = 0;
+                        nextJSDocToken();
+                    }
+                    while (token() !== 1 /* EndOfFileToken */) {
+                        switch (token()) {
+                            case 57 /* AtToken */:
+                                if (state === 0 /* BeginningOfLine */ || state === 1 /* SawAsterisk */) {
+                                    removeTrailingNewlines(comments);
+                                    parseTag(indent);
+                                    // NOTE: According to usejsdoc.org, a tag goes to end of line, except the last tag.
+                                    // Real-world comments may break this rule, so "BeginningOfLine" will not be a real line beginning
+                                    // for malformed examples like `/** @param {string} x @returns {number} the length */`
+                                    state = 0 /* BeginningOfLine */;
+                                    advanceToken = false;
+                                    margin = undefined;
+                                    indent++;
+                                }
+                                else {
+                                    pushComment(scanner.getTokenText());
+                                }
+                                break;
+                            case 4 /* NewLineTrivia */:
+                                comments.push(scanner.getTokenText());
+                                state = 0 /* BeginningOfLine */;
+                                indent = 0;
+                                break;
+                            case 39 /* AsteriskToken */:
+                                var asterisk = scanner.getTokenText();
+                                if (state === 1 /* SawAsterisk */ || state === 2 /* SavingComments */) {
+                                    // If we've already seen an asterisk, then we can no longer parse a tag on this line
+                                    state = 2 /* SavingComments */;
+                                    pushComment(asterisk);
+                                }
+                                else {
+                                    // Ignore the first asterisk on a line
+                                    state = 1 /* SawAsterisk */;
+                                    indent += asterisk.length;
+                                }
+                                break;
+                            case 71 /* Identifier */:
+                                // Anything else is doc comment text. We just save it. Because it
+                                // wasn't a tag, we can no longer parse a tag on this line until we hit the next
+                                // line break.
+                                pushComment(scanner.getTokenText());
+                                state = 2 /* SavingComments */;
+                                break;
+                            case 5 /* WhitespaceTrivia */:
+                                // only collect whitespace if we're already saving comments or have just crossed the comment indent margin
+                                var whitespace = scanner.getTokenText();
+                                if (state === 2 /* SavingComments */) {
+                                    comments.push(whitespace);
+                                }
+                                else if (margin !== undefined && indent + whitespace.length > margin) {
+                                    comments.push(whitespace.slice(margin - indent - 1));
+                                }
+                                indent += whitespace.length;
+                                break;
+                            case 1 /* EndOfFileToken */:
+                                break;
+                            default:
+                                // anything other than whitespace or asterisk at the beginning of the line starts the comment text
+                                state = 2 /* SavingComments */;
+                                pushComment(scanner.getTokenText());
+                                break;
+                        }
+                        if (advanceToken) {
+                            nextJSDocToken();
+                        }
+                        else {
+                            advanceToken = true;
+                        }
+                    }
+                    removeLeadingNewlines(comments);
+                    removeTrailingNewlines(comments);
+                    result = createJSDocComment();
+                });
+                return result;
+                function removeLeadingNewlines(comments) {
+                    while (comments.length && (comments[0] === "\n" || comments[0] === "\r")) {
+                        comments.shift();
                     }
-                    node.jsDocComments.push(jsDoc);
                 }
-            }
-            return node;
-        }
-        function fixupParentReferences(rootNode) {
-            // normally parent references are set during binding. However, for clients that only need
-            // a syntax tree, and no semantic features, then the binding process is an unnecessary
-            // overhead.  This functions allows us to set all the parents, without all the expense of
-            // binding.
-            var parent = rootNode;
-            forEachChild(rootNode, visitNode);
-            return;
-            function visitNode(n) {
-                // walk down setting parents that differ from the parent we think it should be.  This
-                // allows us to quickly bail out of setting parents for subtrees during incremental
-                // parsing
-                if (n.parent !== parent) {
-                    n.parent = parent;
-                    var saveParent = parent;
-                    parent = n;
-                    forEachChild(n, visitNode);
-                    if (n.jsDocComments) {
-                        for (var _i = 0, _a = n.jsDocComments; _i < _a.length; _i++) {
-                            var jsDocComment = _a[_i];
-                            jsDocComment.parent = n;
-                            parent = jsDocComment;
-                            forEachChild(jsDocComment, visitNode);
+                function removeTrailingNewlines(comments) {
+                    while (comments.length && (comments[comments.length - 1] === "\n" || comments[comments.length - 1] === "\r")) {
+                        comments.pop();
+                    }
+                }
+                function isJsDocStart(content, start) {
+                    return content.charCodeAt(start) === 47 /* slash */ &&
+                        content.charCodeAt(start + 1) === 42 /* asterisk */ &&
+                        content.charCodeAt(start + 2) === 42 /* asterisk */ &&
+                        content.charCodeAt(start + 3) !== 42 /* asterisk */;
+                }
+                function createJSDocComment() {
+                    var result = createNode(283 /* JSDocComment */, start);
+                    result.tags = tags;
+                    result.comment = comments.length ? comments.join("") : undefined;
+                    return finishNode(result, end);
+                }
+                function skipWhitespace() {
+                    while (token() === 5 /* WhitespaceTrivia */ || token() === 4 /* NewLineTrivia */) {
+                        nextJSDocToken();
+                    }
+                }
+                function parseTag(indent) {
+                    ts.Debug.assert(token() === 57 /* AtToken */);
+                    var atToken = createNode(57 /* AtToken */, scanner.getTokenPos());
+                    atToken.end = scanner.getTextPos();
+                    nextJSDocToken();
+                    var tagName = parseJSDocIdentifierName();
+                    skipWhitespace();
+                    if (!tagName) {
+                        return;
+                    }
+                    var tag;
+                    if (tagName) {
+                        switch (tagName.text) {
+                            case "augments":
+                                tag = parseAugmentsTag(atToken, tagName);
+                                break;
+                            case "class":
+                            case "constructor":
+                                tag = parseClassTag(atToken, tagName);
+                                break;
+                            case "arg":
+                            case "argument":
+                            case "param":
+                                tag = parseParameterOrPropertyTag(atToken, tagName, /*shouldParseParamTag*/ true);
+                                break;
+                            case "return":
+                            case "returns":
+                                tag = parseReturnTag(atToken, tagName);
+                                break;
+                            case "template":
+                                tag = parseTemplateTag(atToken, tagName);
+                                break;
+                            case "type":
+                                tag = parseTypeTag(atToken, tagName);
+                                break;
+                            case "typedef":
+                                tag = parseTypedefTag(atToken, tagName);
+                                break;
+                            default:
+                                tag = parseUnknownTag(atToken, tagName);
+                                break;
                         }
                     }
-                    parent = saveParent;
+                    else {
+                        tag = parseUnknownTag(atToken, tagName);
+                    }
+                    if (!tag) {
+                        // a badly malformed tag should not be added to the list of tags
+                        return;
+                    }
+                    addTag(tag, parseTagComments(indent + tag.end - tag.pos));
                 }
+                function parseTagComments(indent) {
+                    var comments = [];
+                    var state = 0 /* BeginningOfLine */;
+                    var margin;
+                    function pushComment(text) {
+                        if (!margin) {
+                            margin = indent;
+                        }
+                        comments.push(text);
+                        indent += text.length;
+                    }
+                    while (token() !== 57 /* AtToken */ && token() !== 1 /* EndOfFileToken */) {
+                        switch (token()) {
+                            case 4 /* NewLineTrivia */:
+                                if (state >= 1 /* SawAsterisk */) {
+                                    state = 0 /* BeginningOfLine */;
+                                    comments.push(scanner.getTokenText());
+                                }
+                                indent = 0;
+                                break;
+                            case 57 /* AtToken */:
+                                // Done
+                                break;
+                            case 5 /* WhitespaceTrivia */:
+                                if (state === 2 /* SavingComments */) {
+                                    pushComment(scanner.getTokenText());
+                                }
+                                else {
+                                    var whitespace = scanner.getTokenText();
+                                    // if the whitespace crosses the margin, take only the whitespace that passes the margin
+                                    if (margin !== undefined && indent + whitespace.length > margin) {
+                                        comments.push(whitespace.slice(margin - indent - 1));
+                                    }
+                                    indent += whitespace.length;
+                                }
+                                break;
+                            case 39 /* AsteriskToken */:
+                                if (state === 0 /* BeginningOfLine */) {
+                                    // leading asterisks start recording on the *next* (non-whitespace) token
+                                    state = 1 /* SawAsterisk */;
+                                    indent += scanner.getTokenText().length;
+                                    break;
+                                }
+                            // record the * as a comment
+                            // falls through
+                            default:
+                                state = 2 /* SavingComments */; // leading identifiers start recording as well
+                                pushComment(scanner.getTokenText());
+                                break;
+                        }
+                        if (token() === 57 /* AtToken */) {
+                            // Done
+                            break;
+                        }
+                        nextJSDocToken();
+                    }
+                    removeLeadingNewlines(comments);
+                    removeTrailingNewlines(comments);
+                    return comments;
+                }
+                function parseUnknownTag(atToken, tagName) {
+                    var result = createNode(284 /* JSDocTag */, atToken.pos);
+                    result.atToken = atToken;
+                    result.tagName = tagName;
+                    return finishNode(result);
+                }
+                function addTag(tag, comments) {
+                    tag.comment = comments.join("");
+                    if (!tags) {
+                        tags = createNodeArray([tag], tag.pos);
+                    }
+                    else {
+                        tags.push(tag);
+                    }
+                    tags.end = tag.end;
+                }
+                function tryParseTypeExpression() {
+                    return tryParse(function () {
+                        skipWhitespace();
+                        if (token() !== 17 /* OpenBraceToken */) {
+                            return undefined;
+                        }
+                        return parseJSDocTypeExpression();
+                    });
+                }
+                function parseBracketNameInPropertyAndParamTag() {
+                    // Looking for something like '[foo]' or 'foo'
+                    var isBracketed = parseOptional(21 /* OpenBracketToken */);
+                    var name = parseJSDocIdentifierName(/*createIfMissing*/ true);
+                    if (isBracketed) {
+                        skipWhitespace();
+                        // May have an optional default, e.g. '[foo = 42]'
+                        if (parseOptionalToken(58 /* EqualsToken */)) {
+                            parseExpression();
+                        }
+                        parseExpected(22 /* CloseBracketToken */);
+                    }
+                    return { name: name, isBracketed: isBracketed };
+                }
+                function parseParameterOrPropertyTag(atToken, tagName, shouldParseParamTag) {
+                    var typeExpression = tryParseTypeExpression();
+                    skipWhitespace();
+                    var _a = parseBracketNameInPropertyAndParamTag(), name = _a.name, isBracketed = _a.isBracketed;
+                    skipWhitespace();
+                    var preName, postName;
+                    if (typeExpression) {
+                        postName = name;
+                    }
+                    else {
+                        preName = name;
+                        typeExpression = tryParseTypeExpression();
+                    }
+                    var result = shouldParseParamTag ?
+                        createNode(287 /* JSDocParameterTag */, atToken.pos) :
+                        createNode(292 /* JSDocPropertyTag */, atToken.pos);
+                    result.atToken = atToken;
+                    result.tagName = tagName;
+                    result.preParameterName = preName;
+                    result.typeExpression = typeExpression;
+                    result.postParameterName = postName;
+                    result.name = postName || preName;
+                    result.isBracketed = isBracketed;
+                    return finishNode(result);
+                }
+                function parseReturnTag(atToken, tagName) {
+                    if (ts.forEach(tags, function (t) { return t.kind === 288 /* JSDocReturnTag */; })) {
+                        parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, ts.Diagnostics._0_tag_already_specified, tagName.text);
+                    }
+                    var result = createNode(288 /* JSDocReturnTag */, atToken.pos);
+                    result.atToken = atToken;
+                    result.tagName = tagName;
+                    result.typeExpression = tryParseTypeExpression();
+                    return finishNode(result);
+                }
+                function parseTypeTag(atToken, tagName) {
+                    if (ts.forEach(tags, function (t) { return t.kind === 289 /* JSDocTypeTag */; })) {
+                        parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, ts.Diagnostics._0_tag_already_specified, tagName.text);
+                    }
+                    var result = createNode(289 /* JSDocTypeTag */, atToken.pos);
+                    result.atToken = atToken;
+                    result.tagName = tagName;
+                    result.typeExpression = tryParseTypeExpression();
+                    return finishNode(result);
+                }
+                function parseAugmentsTag(atToken, tagName) {
+                    var typeExpression = tryParseTypeExpression();
+                    var result = createNode(285 /* JSDocAugmentsTag */, atToken.pos);
+                    result.atToken = atToken;
+                    result.tagName = tagName;
+                    result.typeExpression = typeExpression;
+                    return finishNode(result);
+                }
+                function parseClassTag(atToken, tagName) {
+                    var tag = createNode(286 /* JSDocClassTag */, atToken.pos);
+                    tag.atToken = atToken;
+                    tag.tagName = tagName;
+                    return finishNode(tag);
+                }
+                function parseTypedefTag(atToken, tagName) {
+                    var typeExpression = tryParseTypeExpression();
+                    skipWhitespace();
+                    var typedefTag = createNode(291 /* JSDocTypedefTag */, atToken.pos);
+                    typedefTag.atToken = atToken;
+                    typedefTag.tagName = tagName;
+                    typedefTag.fullName = parseJSDocTypeNameWithNamespace(/*flags*/ 0);
+                    if (typedefTag.fullName) {
+                        var rightNode = typedefTag.fullName;
+                        while (true) {
+                            if (rightNode.kind === 71 /* Identifier */ || !rightNode.body) {
+                                // if node is identifier - use it as name
+                                // otherwise use name of the rightmost part that we were able to parse
+                                typedefTag.name = rightNode.kind === 71 /* Identifier */ ? rightNode : rightNode.name;
+                                break;
+                            }
+                            rightNode = rightNode.body;
+                        }
+                    }
+                    typedefTag.typeExpression = typeExpression;
+                    skipWhitespace();
+                    if (typeExpression) {
+                        if (typeExpression.type.kind === 277 /* JSDocTypeReference */) {
+                            var jsDocTypeReference = typeExpression.type;
+                            if (jsDocTypeReference.name.kind === 71 /* Identifier */) {
+                                var name_8 = jsDocTypeReference.name;
+                                if (name_8.text === "Object" || name_8.text === "object") {
+                                    typedefTag.jsDocTypeLiteral = scanChildTags();
+                                }
+                            }
+                        }
+                        if (!typedefTag.jsDocTypeLiteral) {
+                            typedefTag.jsDocTypeLiteral = typeExpression.type;
+                        }
+                    }
+                    else {
+                        typedefTag.jsDocTypeLiteral = scanChildTags();
+                    }
+                    return finishNode(typedefTag);
+                    function scanChildTags() {
+                        var jsDocTypeLiteral = createNode(293 /* JSDocTypeLiteral */, scanner.getStartPos());
+                        var resumePos = scanner.getStartPos();
+                        var canParseTag = true;
+                        var seenAsterisk = false;
+                        var parentTagTerminated = false;
+                        while (token() !== 1 /* EndOfFileToken */ && !parentTagTerminated) {
+                            nextJSDocToken();
+                            switch (token()) {
+                                case 57 /* AtToken */:
+                                    if (canParseTag) {
+                                        parentTagTerminated = !tryParseChildTag(jsDocTypeLiteral);
+                                        if (!parentTagTerminated) {
+                                            resumePos = scanner.getStartPos();
+                                        }
+                                    }
+                                    seenAsterisk = false;
+                                    break;
+                                case 4 /* NewLineTrivia */:
+                                    resumePos = scanner.getStartPos() - 1;
+                                    canParseTag = true;
+                                    seenAsterisk = false;
+                                    break;
+                                case 39 /* AsteriskToken */:
+                                    if (seenAsterisk) {
+                                        canParseTag = false;
+                                    }
+                                    seenAsterisk = true;
+                                    break;
+                                case 71 /* Identifier */:
+                                    canParseTag = false;
+                                    break;
+                                case 1 /* EndOfFileToken */:
+                                    break;
+                            }
+                        }
+                        scanner.setTextPos(resumePos);
+                        return finishNode(jsDocTypeLiteral);
+                    }
+                    function parseJSDocTypeNameWithNamespace(flags) {
+                        var pos = scanner.getTokenPos();
+                        var typeNameOrNamespaceName = parseJSDocIdentifierName();
+                        if (typeNameOrNamespaceName && parseOptional(23 /* DotToken */)) {
+                            var jsDocNamespaceNode = createNode(233 /* ModuleDeclaration */, pos);
+                            jsDocNamespaceNode.flags |= flags;
+                            jsDocNamespaceNode.name = typeNameOrNamespaceName;
+                            jsDocNamespaceNode.body = parseJSDocTypeNameWithNamespace(4 /* NestedNamespace */);
+                            return finishNode(jsDocNamespaceNode);
+                        }
+                        if (typeNameOrNamespaceName && flags & 4 /* NestedNamespace */) {
+                            typeNameOrNamespaceName.isInJSDocNamespace = true;
+                        }
+                        return typeNameOrNamespaceName;
+                    }
+                }
+                function tryParseChildTag(parentTag) {
+                    ts.Debug.assert(token() === 57 /* AtToken */);
+                    var atToken = createNode(57 /* AtToken */, scanner.getStartPos());
+                    atToken.end = scanner.getTextPos();
+                    nextJSDocToken();
+                    var tagName = parseJSDocIdentifierName();
+                    skipWhitespace();
+                    if (!tagName) {
+                        return false;
+                    }
+                    switch (tagName.text) {
+                        case "type":
+                            if (parentTag.jsDocTypeTag) {
+                                // already has a @type tag, terminate the parent tag now.
+                                return false;
+                            }
+                            parentTag.jsDocTypeTag = parseTypeTag(atToken, tagName);
+                            return true;
+                        case "prop":
+                        case "property":
+                            var propertyTag = parseParameterOrPropertyTag(atToken, tagName, /*shouldParseParamTag*/ false);
+                            if (propertyTag) {
+                                if (!parentTag.jsDocPropertyTags) {
+                                    parentTag.jsDocPropertyTags = [];
+                                }
+                                parentTag.jsDocPropertyTags.push(propertyTag);
+                                return true;
+                            }
+                            // Error parsing property tag
+                            return false;
+                    }
+                    return false;
+                }
+                function parseTemplateTag(atToken, tagName) {
+                    if (ts.forEach(tags, function (t) { return t.kind === 290 /* JSDocTemplateTag */; })) {
+                        parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, ts.Diagnostics._0_tag_already_specified, tagName.text);
+                    }
+                    // Type parameter list looks like '@template T,U,V'
+                    var typeParameters = createNodeArray();
+                    while (true) {
+                        var name_9 = parseJSDocIdentifierName();
+                        skipWhitespace();
+                        if (!name_9) {
+                            parseErrorAtPosition(scanner.getStartPos(), 0, ts.Diagnostics.Identifier_expected);
+                            return undefined;
+                        }
+                        var typeParameter = createNode(145 /* TypeParameter */, name_9.pos);
+                        typeParameter.name = name_9;
+                        finishNode(typeParameter);
+                        typeParameters.push(typeParameter);
+                        if (token() === 26 /* CommaToken */) {
+                            nextJSDocToken();
+                            skipWhitespace();
+                        }
+                        else {
+                            break;
+                        }
+                    }
+                    var result = createNode(290 /* JSDocTemplateTag */, atToken.pos);
+                    result.atToken = atToken;
+                    result.tagName = tagName;
+                    result.typeParameters = typeParameters;
+                    finishNode(result);
+                    typeParameters.end = result.end;
+                    return result;
+                }
+                function nextJSDocToken() {
+                    return currentToken = scanner.scanJSDocToken();
+                }
+                function parseJSDocIdentifierName(createIfMissing) {
+                    if (createIfMissing === void 0) { createIfMissing = false; }
+                    return createJSDocIdentifier(ts.tokenIsIdentifierOrKeyword(token()), createIfMissing);
+                }
+                function createJSDocIdentifier(isIdentifier, createIfMissing) {
+                    if (!isIdentifier) {
+                        if (createIfMissing) {
+                            return createMissingNode(71 /* Identifier */, /*reportAtCurrentPosition*/ true, ts.Diagnostics.Identifier_expected);
+                        }
+                        else {
+                            parseErrorAtCurrentToken(ts.Diagnostics.Identifier_expected);
+                            return undefined;
+                        }
+                    }
+                    var pos = scanner.getTokenPos();
+                    var end = scanner.getTextPos();
+                    var result = createNode(71 /* Identifier */, pos);
+                    result.text = content.substring(pos, end);
+                    finishNode(result, end);
+                    nextJSDocToken();
+                    return result;
+                }
+            }
+            JSDocParser.parseJSDocCommentWorker = parseJSDocCommentWorker;
+        })(JSDocParser = Parser.JSDocParser || (Parser.JSDocParser = {}));
+    })(Parser || (Parser = {}));
+    var IncrementalParser;
+    (function (IncrementalParser) {
+        function updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks) {
+            aggressiveChecks = aggressiveChecks || ts.Debug.shouldAssert(2 /* Aggressive */);
+            checkChangeRange(sourceFile, newText, textChangeRange, aggressiveChecks);
+            if (ts.textChangeRangeIsUnchanged(textChangeRange)) {
+                // if the text didn't change, then we can just return our current source file as-is.
+                return sourceFile;
+            }
+            if (sourceFile.statements.length === 0) {
+                // If we don't have any statements in the current source file, then there's no real
+                // way to incrementally parse.  So just do a full parse instead.
+                return Parser.parseSourceFile(sourceFile.fileName, newText, sourceFile.languageVersion, /*syntaxCursor*/ undefined, /*setParentNodes*/ true, sourceFile.scriptKind);
             }
-        }
-        Parser.fixupParentReferences = fixupParentReferences;
-        function createSourceFile(fileName, languageVersion, scriptKind) {
-            // code from createNode is inlined here so createNode won't have to deal with special case of creating source files
-            // this is quite rare comparing to other nodes and createNode should be as fast as possible
-            var sourceFile = new SourceFileConstructor(256 /* SourceFile */, /*pos*/ 0, /* end */ sourceText.length);
-            nodeCount++;
-            sourceFile.text = sourceText;
-            sourceFile.bindDiagnostics = [];
-            sourceFile.languageVersion = languageVersion;
-            sourceFile.fileName = ts.normalizePath(fileName);
-            sourceFile.languageVariant = getLanguageVariant(scriptKind);
-            sourceFile.isDeclarationFile = ts.fileExtensionIs(sourceFile.fileName, ".d.ts");
-            sourceFile.scriptKind = scriptKind;
-            return sourceFile;
-        }
-        function setContextFlag(val, flag) {
-            if (val) {
-                contextFlags |= flag;
-            }
-            else {
-                contextFlags &= ~flag;
-            }
-        }
-        function setDisallowInContext(val) {
-            setContextFlag(val, 32768 /* DisallowInContext */);
-        }
-        function setYieldContext(val) {
-            setContextFlag(val, 65536 /* YieldContext */);
-        }
-        function setDecoratorContext(val) {
-            setContextFlag(val, 131072 /* DecoratorContext */);
-        }
-        function setAwaitContext(val) {
-            setContextFlag(val, 262144 /* AwaitContext */);
-        }
-        function doOutsideOfContext(context, func) {
-            // contextFlagsToClear will contain only the context flags that are
-            // currently set that we need to temporarily clear
-            // We don't just blindly reset to the previous flags to ensure
-            // that we do not mutate cached flags for the incremental
-            // parser (ThisNodeHasError, ThisNodeOrAnySubNodesHasError, and
-            // HasAggregatedChildData).
-            var contextFlagsToClear = context & contextFlags;
-            if (contextFlagsToClear) {
-                // clear the requested context flags
-                setContextFlag(/*val*/ false, contextFlagsToClear);
-                var result = func();
-                // restore the context flags we just cleared
-                setContextFlag(/*val*/ true, contextFlagsToClear);
-                return result;
-            }
-            // no need to do anything special as we are not in any of the requested contexts
-            return func();
-        }
-        function doInsideOfContext(context, func) {
-            // contextFlagsToSet will contain only the context flags that
-            // are not currently set that we need to temporarily enable.
-            // We don't just blindly reset to the previous flags to ensure
-            // that we do not mutate cached flags for the incremental
-            // parser (ThisNodeHasError, ThisNodeOrAnySubNodesHasError, and
-            // HasAggregatedChildData).
-            var contextFlagsToSet = context & ~contextFlags;
-            if (contextFlagsToSet) {
-                // set the requested context flags
-                setContextFlag(/*val*/ true, contextFlagsToSet);
-                var result = func();
-                // reset the context flags we just set
-                setContextFlag(/*val*/ false, contextFlagsToSet);
-                return result;
-            }
-            // no need to do anything special as we are already in all of the requested contexts
-            return func();
-        }
-        function allowInAnd(func) {
-            return doOutsideOfContext(32768 /* DisallowInContext */, func);
-        }
-        function disallowInAnd(func) {
-            return doInsideOfContext(32768 /* DisallowInContext */, func);
-        }
-        function doInYieldContext(func) {
-            return doInsideOfContext(65536 /* YieldContext */, func);
-        }
-        function doInDecoratorContext(func) {
-            return doInsideOfContext(131072 /* DecoratorContext */, func);
-        }
-        function doInAwaitContext(func) {
-            return doInsideOfContext(262144 /* AwaitContext */, func);
-        }
-        function doOutsideOfAwaitContext(func) {
-            return doOutsideOfContext(262144 /* AwaitContext */, func);
-        }
-        function doInYieldAndAwaitContext(func) {
-            return doInsideOfContext(65536 /* YieldContext */ | 262144 /* AwaitContext */, func);
-        }
-        function inContext(flags) {
-            return (contextFlags & flags) !== 0;
-        }
-        function inYieldContext() {
-            return inContext(65536 /* YieldContext */);
-        }
-        function inDisallowInContext() {
-            return inContext(32768 /* DisallowInContext */);
-        }
-        function inDecoratorContext() {
-            return inContext(131072 /* DecoratorContext */);
-        }
-        function inAwaitContext() {
-            return inContext(262144 /* AwaitContext */);
-        }
-        function parseErrorAtCurrentToken(message, arg0) {
-            var start = scanner.getTokenPos();
-            var length = scanner.getTextPos() - start;
-            parseErrorAtPosition(start, length, message, arg0);
-        }
-        function parseErrorAtPosition(start, length, message, arg0) {
-            // Don't report another error if it would just be at the same position as the last error.
-            var lastError = ts.lastOrUndefined(parseDiagnostics);
-            if (!lastError || start !== lastError.start) {
-                parseDiagnostics.push(ts.createFileDiagnostic(sourceFile, start, length, message, arg0));
-            }
-            // Mark that we've encountered an error.  We'll set an appropriate bit on the next
-            // node we finish so that it can't be reused incrementally.
-            parseErrorBeforeNextFinishedNode = true;
-        }
-        function scanError(message, length) {
-            var pos = scanner.getTextPos();
-            parseErrorAtPosition(pos, length || 0, message);
-        }
-        function getNodePos() {
-            return scanner.getStartPos();
-        }
-        function getNodeEnd() {
-            return scanner.getStartPos();
-        }
-        // Use this function to access the current token instead of reading the currentToken
-        // variable. Since function results aren't narrowed in control flow analysis, this ensures
-        // that the type checker doesn't make wrong assumptions about the type of the current
-        // token (e.g. a call to nextToken() changes the current token but the checker doesn't
-        // reason about this side effect).  Mainstream VMs inline simple functions like this, so
-        // there is no performance penalty.
-        function token() {
-            return currentToken;
-        }
-        function nextToken() {
-            return currentToken = scanner.scan();
-        }
-        function reScanGreaterToken() {
-            return currentToken = scanner.reScanGreaterToken();
-        }
-        function reScanSlashToken() {
-            return currentToken = scanner.reScanSlashToken();
-        }
-        function reScanTemplateToken() {
-            return currentToken = scanner.reScanTemplateToken();
-        }
-        function scanJsxIdentifier() {
-            return currentToken = scanner.scanJsxIdentifier();
-        }
-        function scanJsxText() {
-            return currentToken = scanner.scanJsxToken();
-        }
-        function scanJsxAttributeValue() {
-            return currentToken = scanner.scanJsxAttributeValue();
-        }
-        function speculationHelper(callback, isLookAhead) {
-            // Keep track of the state we'll need to rollback to if lookahead fails (or if the
-            // caller asked us to always reset our state).
-            var saveToken = currentToken;
-            var saveParseDiagnosticsLength = parseDiagnostics.length;
-            var saveParseErrorBeforeNextFinishedNode = parseErrorBeforeNextFinishedNode;
-            // Note: it is not actually necessary to save/restore the context flags here.  That's
-            // because the saving/restoring of these flags happens naturally through the recursive
-            // descent nature of our parser.  However, we still store this here just so we can
-            // assert that invariant holds.
-            var saveContextFlags = contextFlags;
-            // If we're only looking ahead, then tell the scanner to only lookahead as well.
-            // Otherwise, if we're actually speculatively parsing, then tell the scanner to do the
-            // same.
-            var result = isLookAhead
-                ? scanner.lookAhead(callback)
-                : scanner.tryScan(callback);
-            ts.Debug.assert(saveContextFlags === contextFlags);
-            // If our callback returned something 'falsy' or we're just looking ahead,
-            // then unconditionally restore us to where we were.
-            if (!result || isLookAhead) {
-                currentToken = saveToken;
-                parseDiagnostics.length = saveParseDiagnosticsLength;
-                parseErrorBeforeNextFinishedNode = saveParseErrorBeforeNextFinishedNode;
-            }
+            // Make sure we're not trying to incrementally update a source file more than once.  Once
+            // we do an update the original source file is considered unusable from that point onwards.
+            //
+            // This is because we do incremental parsing in-place.  i.e. we take nodes from the old
+            // tree and give them new positions and parents.  From that point on, trusting the old
+            // tree at all is not possible as far too much of it may violate invariants.
+            var incrementalSourceFile = sourceFile;
+            ts.Debug.assert(!incrementalSourceFile.hasBeenIncrementallyParsed);
+            incrementalSourceFile.hasBeenIncrementallyParsed = true;
+            var oldText = sourceFile.text;
+            var syntaxCursor = createSyntaxCursor(sourceFile);
+            // Make the actual change larger so that we know to reparse anything whose lookahead
+            // might have intersected the change.
+            var changeRange = extendToAffectedRange(sourceFile, textChangeRange);
+            checkChangeRange(sourceFile, newText, changeRange, aggressiveChecks);
+            // Ensure that extending the affected range only moved the start of the change range
+            // earlier in the file.
+            ts.Debug.assert(changeRange.span.start <= textChangeRange.span.start);
+            ts.Debug.assert(ts.textSpanEnd(changeRange.span) === ts.textSpanEnd(textChangeRange.span));
+            ts.Debug.assert(ts.textSpanEnd(ts.textChangeRangeNewSpan(changeRange)) === ts.textSpanEnd(ts.textChangeRangeNewSpan(textChangeRange)));
+            // The is the amount the nodes after the edit range need to be adjusted.  It can be
+            // positive (if the edit added characters), negative (if the edit deleted characters)
+            // or zero (if this was a pure overwrite with nothing added/removed).
+            var delta = ts.textChangeRangeNewSpan(changeRange).length - changeRange.span.length;
+            // If we added or removed characters during the edit, then we need to go and adjust all
+            // the nodes after the edit.  Those nodes may move forward (if we inserted chars) or they
+            // may move backward (if we deleted chars).
+            //
+            // Doing this helps us out in two ways.  First, it means that any nodes/tokens we want
+            // to reuse are already at the appropriate position in the new text.  That way when we
+            // reuse them, we don't have to figure out if they need to be adjusted.  Second, it makes
+            // it very easy to determine if we can reuse a node.  If the node's position is at where
+            // we are in the text, then we can reuse it.  Otherwise we can't.  If the node's position
+            // is ahead of us, then we'll need to rescan tokens.  If the node's position is behind
+            // us, then we'll need to skip it or crumble it as appropriate
+            //
+            // We will also adjust the positions of nodes that intersect the change range as well.
+            // By doing this, we ensure that all the positions in the old tree are consistent, not
+            // just the positions of nodes entirely before/after the change range.  By being
+            // consistent, we can then easily map from positions to nodes in the old tree easily.
+            //
+            // Also, mark any syntax elements that intersect the changed span.  We know, up front,
+            // that we cannot reuse these elements.
+            updateTokenPositionsAndMarkElements(incrementalSourceFile, changeRange.span.start, ts.textSpanEnd(changeRange.span), ts.textSpanEnd(ts.textChangeRangeNewSpan(changeRange)), delta, oldText, newText, aggressiveChecks);
+            // Now that we've set up our internal incremental state just proceed and parse the
+            // source file in the normal fashion.  When possible the parser will retrieve and
+            // reuse nodes from the old tree.
+            //
+            // Note: passing in 'true' for setNodeParents is very important.  When incrementally
+            // parsing, we will be reusing nodes from the old tree, and placing it into new
+            // parents.  If we don't set the parents now, we'll end up with an observably
+            // inconsistent tree.  Setting the parents on the new tree should be very fast.  We
+            // will immediately bail out of walking any subtrees when we can see that their parents
+            // are already correct.
+            var result = Parser.parseSourceFile(sourceFile.fileName, newText, sourceFile.languageVersion, syntaxCursor, /*setParentNodes*/ true, sourceFile.scriptKind);
             return result;
         }
-        /** Invokes the provided callback then unconditionally restores the parser to the state it
-         * was in immediately prior to invoking the callback.  The result of invoking the callback
-         * is returned from this function.
-         */
-        function lookAhead(callback) {
-            return speculationHelper(callback, /*isLookAhead*/ true);
-        }
-        /** Invokes the provided callback.  If the callback returns something falsy, then it restores
-         * the parser to the state it was in immediately prior to invoking the callback.  If the
-         * callback returns something truthy, then the parser state is not rolled back.  The result
-         * of invoking the callback is returned from this function.
-         */
-        function tryParse(callback) {
-            return speculationHelper(callback, /*isLookAhead*/ false);
-        }
-        // Ignore strict mode flag because we will report an error in type checker instead.
-        function isIdentifier() {
-            if (token() === 69 /* Identifier */) {
-                return true;
+        IncrementalParser.updateSourceFile = updateSourceFile;
+        function moveElementEntirelyPastChangeRange(element, isArray, delta, oldText, newText, aggressiveChecks) {
+            if (isArray) {
+                visitArray(element);
             }
-            // If we have a 'yield' keyword, and we're in the [yield] context, then 'yield' is
-            // considered a keyword and is not an identifier.
-            if (token() === 114 /* YieldKeyword */ && inYieldContext()) {
-                return false;
+            else {
+                visitNode(element);
             }
-            // If we have a 'await' keyword, and we're in the [Await] context, then 'await' is
-            // considered a keyword and is not an identifier.
-            if (token() === 119 /* AwaitKeyword */ && inAwaitContext()) {
-                return false;
+            return;
+            function visitNode(node) {
+                var text = "";
+                if (aggressiveChecks && shouldCheckNode(node)) {
+                    text = oldText.substring(node.pos, node.end);
+                }
+                // Ditch any existing LS children we may have created.  This way we can avoid
+                // moving them forward.
+                if (node._children) {
+                    node._children = undefined;
+                }
+                node.pos += delta;
+                node.end += delta;
+                if (aggressiveChecks && shouldCheckNode(node)) {
+                    ts.Debug.assert(text === newText.substring(node.pos, node.end));
+                }
+                forEachChild(node, visitNode, visitArray);
+                if (node.jsDoc) {
+                    for (var _i = 0, _a = node.jsDoc; _i < _a.length; _i++) {
+                        var jsDocComment = _a[_i];
+                        forEachChild(jsDocComment, visitNode, visitArray);
+                    }
+                }
+                checkNodePositions(node, aggressiveChecks);
             }
-            return token() > 105 /* LastReservedWord */;
-        }
-        function parseExpected(kind, diagnosticMessage, shouldAdvance) {
-            if (shouldAdvance === void 0) { shouldAdvance = true; }
-            if (token() === kind) {
-                if (shouldAdvance) {
-                    nextToken();
+            function visitArray(array) {
+                array._children = undefined;
+                array.pos += delta;
+                array.end += delta;
+                for (var _i = 0, array_9 = array; _i < array_9.length; _i++) {
+                    var node = array_9[_i];
+                    visitNode(node);
                 }
-                return true;
             }
-            // Report specific message if provided with one.  Otherwise, report generic fallback message.
-            if (diagnosticMessage) {
-                parseErrorAtCurrentToken(diagnosticMessage);
+        }
+        function shouldCheckNode(node) {
+            switch (node.kind) {
+                case 9 /* StringLiteral */:
+                case 8 /* NumericLiteral */:
+                case 71 /* Identifier */:
+                    return true;
+            }
+            return false;
+        }
+        function adjustIntersectingElement(element, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta) {
+            ts.Debug.assert(element.end >= changeStart, "Adjusting an element that was entirely before the change range");
+            ts.Debug.assert(element.pos <= changeRangeOldEnd, "Adjusting an element that was entirely after the change range");
+            ts.Debug.assert(element.pos <= element.end);
+            // We have an element that intersects the change range in some way.  It may have its
+            // start, or its end (or both) in the changed range.  We want to adjust any part
+            // that intersects such that the final tree is in a consistent state.  i.e. all
+            // children have spans within the span of their parent, and all siblings are ordered
+            // properly.
+            // We may need to update both the 'pos' and the 'end' of the element.
+            // If the 'pos' is before the start of the change, then we don't need to touch it.
+            // If it isn't, then the 'pos' must be inside the change.  How we update it will
+            // depend if delta is  positive or negative.  If delta is positive then we have
+            // something like:
+            //
+            //  -------------------AAA-----------------
+            //  -------------------BBBCCCCCCC-----------------
+            //
+            // In this case, we consider any node that started in the change range to still be
+            // starting at the same position.
+            //
+            // however, if the delta is negative, then we instead have something like this:
+            //
+            //  -------------------XXXYYYYYYY-----------------
+            //  -------------------ZZZ-----------------
+            //
+            // In this case, any element that started in the 'X' range will keep its position.
+            // However any element that started after that will have their pos adjusted to be
+            // at the end of the new range.  i.e. any node that started in the 'Y' range will
+            // be adjusted to have their start at the end of the 'Z' range.
+            //
+            // The element will keep its position if possible.  Or Move backward to the new-end
+            // if it's in the 'Y' range.
+            element.pos = Math.min(element.pos, changeRangeNewEnd);
+            // If the 'end' is after the change range, then we always adjust it by the delta
+            // amount.  However, if the end is in the change range, then how we adjust it
+            // will depend on if delta is  positive or negative.  If delta is positive then we
+            // have something like:
+            //
+            //  -------------------AAA-----------------
+            //  -------------------BBBCCCCCCC-----------------
+            //
+            // In this case, we consider any node that ended inside the change range to keep its
+            // end position.
+            //
+            // however, if the delta is negative, then we instead have something like this:
+            //
+            //  -------------------XXXYYYYYYY-----------------
+            //  -------------------ZZZ-----------------
+            //
+            // In this case, any element that ended in the 'X' range will keep its position.
+            // However any element that ended after that will have their pos adjusted to be
+            // at the end of the new range.  i.e. any node that ended in the 'Y' range will
+            // be adjusted to have their end at the end of the 'Z' range.
+            if (element.end >= changeRangeOldEnd) {
+                // Element ends after the change range.  Always adjust the end pos.
+                element.end += delta;
             }
             else {
-                parseErrorAtCurrentToken(ts.Diagnostics._0_expected, ts.tokenToString(kind));
+                // Element ends in the change range.  The element will keep its position if
+                // possible. Or Move backward to the new-end if it's in the 'Y' range.
+                element.end = Math.min(element.end, changeRangeNewEnd);
+            }
+            ts.Debug.assert(element.pos <= element.end);
+            if (element.parent) {
+                ts.Debug.assert(element.pos >= element.parent.pos);
+                ts.Debug.assert(element.end <= element.parent.end);
             }
-            return false;
         }
-        function parseOptional(t) {
-            if (token() === t) {
-                nextToken();
-                return true;
+        function checkNodePositions(node, aggressiveChecks) {
+            if (aggressiveChecks) {
+                var pos_2 = node.pos;
+                forEachChild(node, function (child) {
+                    ts.Debug.assert(child.pos >= pos_2);
+                    pos_2 = child.end;
+                });
+                ts.Debug.assert(pos_2 <= node.end);
             }
-            return false;
         }
-        function parseOptionalToken(t) {
-            if (token() === t) {
-                return parseTokenNode();
+        function updateTokenPositionsAndMarkElements(sourceFile, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta, oldText, newText, aggressiveChecks) {
+            visitNode(sourceFile);
+            return;
+            function visitNode(child) {
+                ts.Debug.assert(child.pos <= child.end);
+                if (child.pos > changeRangeOldEnd) {
+                    // Node is entirely past the change range.  We need to move both its pos and
+                    // end, forward or backward appropriately.
+                    moveElementEntirelyPastChangeRange(child, /*isArray*/ false, delta, oldText, newText, aggressiveChecks);
+                    return;
+                }
+                // Check if the element intersects the change range.  If it does, then it is not
+                // reusable.  Also, we'll need to recurse to see what constituent portions we may
+                // be able to use.
+                var fullEnd = child.end;
+                if (fullEnd >= changeStart) {
+                    child.intersectsChange = true;
+                    child._children = undefined;
+                    // Adjust the pos or end (or both) of the intersecting element accordingly.
+                    adjustIntersectingElement(child, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta);
+                    forEachChild(child, visitNode, visitArray);
+                    checkNodePositions(child, aggressiveChecks);
+                    return;
+                }
+                // Otherwise, the node is entirely before the change range.  No need to do anything with it.
+                ts.Debug.assert(fullEnd < changeStart);
+            }
+            function visitArray(array) {
+                ts.Debug.assert(array.pos <= array.end);
+                if (array.pos > changeRangeOldEnd) {
+                    // Array is entirely after the change range.  We need to move it, and move any of
+                    // its children.
+                    moveElementEntirelyPastChangeRange(array, /*isArray*/ true, delta, oldText, newText, aggressiveChecks);
+                    return;
+                }
+                // Check if the element intersects the change range.  If it does, then it is not
+                // reusable.  Also, we'll need to recurse to see what constituent portions we may
+                // be able to use.
+                var fullEnd = array.end;
+                if (fullEnd >= changeStart) {
+                    array.intersectsChange = true;
+                    array._children = undefined;
+                    // Adjust the pos or end (or both) of the intersecting array accordingly.
+                    adjustIntersectingElement(array, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta);
+                    for (var _i = 0, array_10 = array; _i < array_10.length; _i++) {
+                        var node = array_10[_i];
+                        visitNode(node);
+                    }
+                    return;
+                }
+                // Otherwise, the array is entirely before the change range.  No need to do anything with it.
+                ts.Debug.assert(fullEnd < changeStart);
             }
-            return undefined;
         }
-        function parseExpectedToken(t, reportAtCurrentPosition, diagnosticMessage, arg0) {
-            return parseOptionalToken(t) ||
-                createMissingNode(t, reportAtCurrentPosition, diagnosticMessage, arg0);
+        function extendToAffectedRange(sourceFile, changeRange) {
+            // Consider the following code:
+            //      void foo() { /; }
+            //
+            // If the text changes with an insertion of / just before the semicolon then we end up with:
+            //      void foo() { //; }
+            //
+            // If we were to just use the changeRange a is, then we would not rescan the { token
+            // (as it does not intersect the actual original change range).  Because an edit may
+            // change the token touching it, we actually need to look back *at least* one token so
+            // that the prior token sees that change.
+            var maxLookahead = 1;
+            var start = changeRange.span.start;
+            // the first iteration aligns us with the change start. subsequent iteration move us to
+            // the left by maxLookahead tokens.  We only need to do this as long as we're not at the
+            // start of the tree.
+            for (var i = 0; start > 0 && i <= maxLookahead; i++) {
+                var nearestNode = findNearestNodeStartingBeforeOrAtPosition(sourceFile, start);
+                ts.Debug.assert(nearestNode.pos <= start);
+                var position = nearestNode.pos;
+                start = Math.max(0, position - 1);
+            }
+            var finalSpan = ts.createTextSpanFromBounds(start, ts.textSpanEnd(changeRange.span));
+            var finalLength = changeRange.newLength + (changeRange.span.start - start);
+            return ts.createTextChangeRange(finalSpan, finalLength);
         }
-        function parseTokenNode() {
-            var node = createNode(token());
-            nextToken();
-            return finishNode(node);
+        function findNearestNodeStartingBeforeOrAtPosition(sourceFile, position) {
+            var bestResult = sourceFile;
+            var lastNodeEntirelyBeforePosition;
+            forEachChild(sourceFile, visit);
+            if (lastNodeEntirelyBeforePosition) {
+                var lastChildOfLastEntireNodeBeforePosition = getLastChild(lastNodeEntirelyBeforePosition);
+                if (lastChildOfLastEntireNodeBeforePosition.pos > bestResult.pos) {
+                    bestResult = lastChildOfLastEntireNodeBeforePosition;
+                }
+            }
+            return bestResult;
+            function getLastChild(node) {
+                while (true) {
+                    var lastChild = getLastChildWorker(node);
+                    if (lastChild) {
+                        node = lastChild;
+                    }
+                    else {
+                        return node;
+                    }
+                }
+            }
+            function getLastChildWorker(node) {
+                var last = undefined;
+                forEachChild(node, function (child) {
+                    if (ts.nodeIsPresent(child)) {
+                        last = child;
+                    }
+                });
+                return last;
+            }
+            function visit(child) {
+                if (ts.nodeIsMissing(child)) {
+                    // Missing nodes are effectively invisible to us.  We never even consider them
+                    // When trying to find the nearest node before us.
+                    return;
+                }
+                // If the child intersects this position, then this node is currently the nearest
+                // node that starts before the position.
+                if (child.pos <= position) {
+                    if (child.pos >= bestResult.pos) {
+                        // This node starts before the position, and is closer to the position than
+                        // the previous best node we found.  It is now the new best node.
+                        bestResult = child;
+                    }
+                    // Now, the node may overlap the position, or it may end entirely before the
+                    // position.  If it overlaps with the position, then either it, or one of its
+                    // children must be the nearest node before the position.  So we can just
+                    // recurse into this child to see if we can find something better.
+                    if (position < child.end) {
+                        // The nearest node is either this child, or one of the children inside
+                        // of it.  We've already marked this child as the best so far.  Recurse
+                        // in case one of the children is better.
+                        forEachChild(child, visit);
+                        // Once we look at the children of this node, then there's no need to
+                        // continue any further.
+                        return true;
+                    }
+                    else {
+                        ts.Debug.assert(child.end <= position);
+                        // The child ends entirely before this position.  Say you have the following
+                        // (where $ is the position)
+                        //
+                        //      <complex expr 1> ? <complex expr 2> $ : <...> <...>
+                        //
+                        // We would want to find the nearest preceding node in "complex expr 2".
+                        // To support that, we keep track of this node, and once we're done searching
+                        // for a best node, we recurse down this node to see if we can find a good
+                        // result in it.
+                        //
+                        // This approach allows us to quickly skip over nodes that are entirely
+                        // before the position, while still allowing us to find any nodes in the
+                        // last one that might be what we want.
+                        lastNodeEntirelyBeforePosition = child;
+                    }
+                }
+                else {
+                    ts.Debug.assert(child.pos > position);
+                    // We're now at a node that is entirely past the position we're searching for.
+                    // This node (and all following nodes) could never contribute to the result,
+                    // so just skip them by returning 'true' here.
+                    return true;
+                }
+            }
         }
-        function canParseSemicolon() {
-            // If there's a real semicolon, then we can always parse it out.
-            if (token() === 23 /* SemicolonToken */) {
-                return true;
+        function checkChangeRange(sourceFile, newText, textChangeRange, aggressiveChecks) {
+            var oldText = sourceFile.text;
+            if (textChangeRange) {
+                ts.Debug.assert((oldText.length - textChangeRange.span.length + textChangeRange.newLength) === newText.length);
+                if (aggressiveChecks || ts.Debug.shouldAssert(3 /* VeryAggressive */)) {
+                    var oldTextPrefix = oldText.substr(0, textChangeRange.span.start);
+                    var newTextPrefix = newText.substr(0, textChangeRange.span.start);
+                    ts.Debug.assert(oldTextPrefix === newTextPrefix);
+                    var oldTextSuffix = oldText.substring(ts.textSpanEnd(textChangeRange.span), oldText.length);
+                    var newTextSuffix = newText.substring(ts.textSpanEnd(ts.textChangeRangeNewSpan(textChangeRange)), newText.length);
+                    ts.Debug.assert(oldTextSuffix === newTextSuffix);
+                }
             }
-            // We can parse out an optional semicolon in ASI cases in the following cases.
-            return token() === 16 /* CloseBraceToken */ || token() === 1 /* EndOfFileToken */ || scanner.hasPrecedingLineBreak();
         }
-        function parseSemicolon() {
-            if (canParseSemicolon()) {
-                if (token() === 23 /* SemicolonToken */) {
-                    // consume the semicolon if it was explicitly provided.
-                    nextToken();
+        function createSyntaxCursor(sourceFile) {
+            var currentArray = sourceFile.statements;
+            var currentArrayIndex = 0;
+            ts.Debug.assert(currentArrayIndex < currentArray.length);
+            var current = currentArray[currentArrayIndex];
+            var lastQueriedPosition = -1 /* Value */;
+            return {
+                currentNode: function (position) {
+                    // Only compute the current node if the position is different than the last time
+                    // we were asked.  The parser commonly asks for the node at the same position
+                    // twice.  Once to know if can read an appropriate list element at a certain point,
+                    // and then to actually read and consume the node.
+                    if (position !== lastQueriedPosition) {
+                        // Much of the time the parser will need the very next node in the array that
+                        // we just returned a node from.So just simply check for that case and move
+                        // forward in the array instead of searching for the node again.
+                        if (current && current.end === position && currentArrayIndex < (currentArray.length - 1)) {
+                            currentArrayIndex++;
+                            current = currentArray[currentArrayIndex];
+                        }
+                        // If we don't have a node, or the node we have isn't in the right position,
+                        // then try to find a viable node at the position requested.
+                        if (!current || current.pos !== position) {
+                            findHighestListElementThatStartsAtPosition(position);
+                        }
+                    }
+                    // Cache this query so that we don't do any extra work if the parser calls back
+                    // into us.  Note: this is very common as the parser will make pairs of calls like
+                    // 'isListElement -> parseListElement'.  If we were unable to find a node when
+                    // called with 'isListElement', we don't want to redo the work when parseListElement
+                    // is called immediately after.
+                    lastQueriedPosition = position;
+                    // Either we don'd have a node, or we have a node at the position being asked for.
+                    ts.Debug.assert(!current || current.pos === position);
+                    return current;
+                }
+            };
+            // Finds the highest element in the tree we can find that starts at the provided position.
+            // The element must be a direct child of some node list in the tree.  This way after we
+            // return it, we can easily return its next sibling in the list.
+            function findHighestListElementThatStartsAtPosition(position) {
+                // Clear out any cached state about the last node we found.
+                currentArray = undefined;
+                currentArrayIndex = -1 /* Value */;
+                current = undefined;
+                // Recurse into the source file to find the highest node at this position.
+                forEachChild(sourceFile, visitNode, visitArray);
+                return;
+                function visitNode(node) {
+                    if (position >= node.pos && position < node.end) {
+                        // Position was within this node.  Keep searching deeper to find the node.
+                        forEachChild(node, visitNode, visitArray);
+                        // don't proceed any further in the search.
+                        return true;
+                    }
+                    // position wasn't in this node, have to keep searching.
+                    return false;
+                }
+                function visitArray(array) {
+                    if (position >= array.pos && position < array.end) {
+                        // position was in this array.  Search through this array to see if we find a
+                        // viable element.
+                        for (var i = 0; i < array.length; i++) {
+                            var child = array[i];
+                            if (child) {
+                                if (child.pos === position) {
+                                    // Found the right node.  We're done.
+                                    currentArray = array;
+                                    currentArrayIndex = i;
+                                    current = child;
+                                    return true;
+                                }
+                                else {
+                                    if (child.pos < position && position < child.end) {
+                                        // Position in somewhere within this child.  Search in it and
+                                        // stop searching in this array.
+                                        forEachChild(child, visitNode, visitArray);
+                                        return true;
+                                    }
+                                }
+                            }
+                        }
+                    }
+                    // position wasn't in this array, have to keep searching.
+                    return false;
                 }
-                return true;
-            }
-            else {
-                return parseExpected(23 /* SemicolonToken */);
-            }
-        }
-        // note: this function creates only node
-        function createNode(kind, pos) {
-            nodeCount++;
-            if (!(pos >= 0)) {
-                pos = scanner.getStartPos();
-            }
-            return kind >= 139 /* FirstNode */ ? new NodeConstructor(kind, pos, pos) :
-                kind === 69 /* Identifier */ ? new IdentifierConstructor(kind, pos, pos) :
-                    new TokenConstructor(kind, pos, pos);
-        }
-        function createNodeArray(elements, pos) {
-            var array = (elements || []);
-            if (!(pos >= 0)) {
-                pos = getNodePos();
             }
-            array.pos = pos;
-            array.end = pos;
-            return array;
         }
-        function finishNode(node, end) {
-            node.end = end === undefined ? scanner.getStartPos() : end;
-            if (contextFlags) {
-                node.flags |= contextFlags;
-            }
-            // Keep track on the node if we encountered an error while parsing it.  If we did, then
-            // we cannot reuse the node incrementally.  Once we've marked this node, clear out the
-            // flag so that we don't mark any subsequent nodes.
-            if (parseErrorBeforeNextFinishedNode) {
-                parseErrorBeforeNextFinishedNode = false;
-                node.flags |= 524288 /* ThisNodeHasError */;
-            }
-            return node;
+        var InvalidPosition;
+        (function (InvalidPosition) {
+            InvalidPosition[InvalidPosition["Value"] = -1] = "Value";
+        })(InvalidPosition || (InvalidPosition = {}));
+    })(IncrementalParser || (IncrementalParser = {}));
+})(ts || (ts = {}));
+/// <reference path="utilities.ts"/>
+/// <reference path="parser.ts"/>
+/* @internal */
+var ts;
+(function (ts) {
+    var ModuleInstanceState;
+    (function (ModuleInstanceState) {
+        ModuleInstanceState[ModuleInstanceState["NonInstantiated"] = 0] = "NonInstantiated";
+        ModuleInstanceState[ModuleInstanceState["Instantiated"] = 1] = "Instantiated";
+        ModuleInstanceState[ModuleInstanceState["ConstEnumOnly"] = 2] = "ConstEnumOnly";
+    })(ModuleInstanceState = ts.ModuleInstanceState || (ts.ModuleInstanceState = {}));
+    function getModuleInstanceState(node) {
+        // A module is uninstantiated if it contains only
+        // 1. interface declarations, type alias declarations
+        if (node.kind === 230 /* InterfaceDeclaration */ || node.kind === 231 /* TypeAliasDeclaration */) {
+            return 0 /* NonInstantiated */;
         }
-        function createMissingNode(kind, reportAtCurrentPosition, diagnosticMessage, arg0) {
-            if (reportAtCurrentPosition) {
-                parseErrorAtPosition(scanner.getStartPos(), 0, diagnosticMessage, arg0);
-            }
-            else {
-                parseErrorAtCurrentToken(diagnosticMessage, arg0);
-            }
-            var result = createNode(kind, scanner.getStartPos());
-            result.text = "";
-            return finishNode(result);
+        else if (ts.isConstEnumDeclaration(node)) {
+            return 2 /* ConstEnumOnly */;
         }
-        function internIdentifier(text) {
-            text = ts.escapeIdentifier(text);
-            return identifiers[text] || (identifiers[text] = text);
+        else if ((node.kind === 238 /* ImportDeclaration */ || node.kind === 237 /* ImportEqualsDeclaration */) && !(ts.hasModifier(node, 1 /* Export */))) {
+            return 0 /* NonInstantiated */;
         }
-        // An identifier that starts with two underscores has an extra underscore character prepended to it to avoid issues
-        // with magic property names like '__proto__'. The 'identifiers' object is used to share a single string instance for
-        // each identifier in order to reduce memory consumption.
-        function createIdentifier(isIdentifier, diagnosticMessage) {
-            identifierCount++;
-            if (isIdentifier) {
-                var node = createNode(69 /* Identifier */);
-                // Store original token kind if it is not just an Identifier so we can report appropriate error later in type checker
-                if (token() !== 69 /* Identifier */) {
-                    node.originalKeywordKind = token();
+        else if (node.kind === 234 /* ModuleBlock */) {
+            var state_1 = 0 /* NonInstantiated */;
+            ts.forEachChild(node, function (n) {
+                switch (getModuleInstanceState(n)) {
+                    case 0 /* NonInstantiated */:
+                        // child is non-instantiated - continue searching
+                        return false;
+                    case 2 /* ConstEnumOnly */:
+                        // child is const enum only - record state and continue searching
+                        state_1 = 2 /* ConstEnumOnly */;
+                        return false;
+                    case 1 /* Instantiated */:
+                        // child is instantiated - record state and stop
+                        state_1 = 1 /* Instantiated */;
+                        return true;
                 }
-                node.text = internIdentifier(scanner.getTokenValue());
-                nextToken();
-                return finishNode(node);
-            }
-            return createMissingNode(69 /* Identifier */, /*reportAtCurrentPosition*/ false, diagnosticMessage || ts.Diagnostics.Identifier_expected);
+            });
+            return state_1;
         }
-        function parseIdentifier(diagnosticMessage) {
-            return createIdentifier(isIdentifier(), diagnosticMessage);
+        else if (node.kind === 233 /* ModuleDeclaration */) {
+            var body = node.body;
+            return body ? getModuleInstanceState(body) : 1 /* Instantiated */;
         }
-        function parseIdentifierName() {
-            return createIdentifier(ts.tokenIsIdentifierOrKeyword(token()));
+        else if (node.kind === 71 /* Identifier */ && node.isInJSDocNamespace) {
+            return 0 /* NonInstantiated */;
         }
-        function isLiteralPropertyName() {
-            return ts.tokenIsIdentifierOrKeyword(token()) ||
-                token() === 9 /* StringLiteral */ ||
-                token() === 8 /* NumericLiteral */;
+        else {
+            return 1 /* Instantiated */;
         }
-        function parsePropertyNameWorker(allowComputedPropertyNames) {
-            if (token() === 9 /* StringLiteral */ || token() === 8 /* NumericLiteral */) {
-                return parseLiteralNode(/*internName*/ true);
-            }
-            if (allowComputedPropertyNames && token() === 19 /* OpenBracketToken */) {
-                return parseComputedPropertyName();
+    }
+    ts.getModuleInstanceState = getModuleInstanceState;
+    var ContainerFlags;
+    (function (ContainerFlags) {
+        // The current node is not a container, and no container manipulation should happen before
+        // recursing into it.
+        ContainerFlags[ContainerFlags["None"] = 0] = "None";
+        // The current node is a container.  It should be set as the current container (and block-
+        // container) before recursing into it.  The current node does not have locals.  Examples:
+        //
+        //      Classes, ObjectLiterals, TypeLiterals, Interfaces...
+        ContainerFlags[ContainerFlags["IsContainer"] = 1] = "IsContainer";
+        // The current node is a block-scoped-container.  It should be set as the current block-
+        // container before recursing into it.  Examples:
+        //
+        //      Blocks (when not parented by functions), Catch clauses, For/For-in/For-of statements...
+        ContainerFlags[ContainerFlags["IsBlockScopedContainer"] = 2] = "IsBlockScopedContainer";
+        // The current node is the container of a control flow path. The current control flow should
+        // be saved and restored, and a new control flow initialized within the container.
+        ContainerFlags[ContainerFlags["IsControlFlowContainer"] = 4] = "IsControlFlowContainer";
+        ContainerFlags[ContainerFlags["IsFunctionLike"] = 8] = "IsFunctionLike";
+        ContainerFlags[ContainerFlags["IsFunctionExpression"] = 16] = "IsFunctionExpression";
+        ContainerFlags[ContainerFlags["HasLocals"] = 32] = "HasLocals";
+        ContainerFlags[ContainerFlags["IsInterface"] = 64] = "IsInterface";
+        ContainerFlags[ContainerFlags["IsObjectLiteralOrClassExpressionMethod"] = 128] = "IsObjectLiteralOrClassExpressionMethod";
+    })(ContainerFlags || (ContainerFlags = {}));
+    var binder = createBinder();
+    function bindSourceFile(file, options) {
+        ts.performance.mark("beforeBind");
+        binder(file, options);
+        ts.performance.mark("afterBind");
+        ts.performance.measure("Bind", "beforeBind", "afterBind");
+    }
+    ts.bindSourceFile = bindSourceFile;
+    function createBinder() {
+        var file;
+        var options;
+        var languageVersion;
+        var parent;
+        var container;
+        var blockScopeContainer;
+        var lastContainer;
+        var seenThisKeyword;
+        // state used by control flow analysis
+        var currentFlow;
+        var currentBreakTarget;
+        var currentContinueTarget;
+        var currentReturnTarget;
+        var currentTrueTarget;
+        var currentFalseTarget;
+        var preSwitchCaseFlow;
+        var activeLabels;
+        var hasExplicitReturn;
+        // state used for emit helpers
+        var emitFlags;
+        // If this file is an external module, then it is automatically in strict-mode according to
+        // ES6.  If it is not an external module, then we'll determine if it is in strict mode or
+        // not depending on if we see "use strict" in certain places or if we hit a class/namespace
+        // or if compiler options contain alwaysStrict.
+        var inStrictMode;
+        var symbolCount = 0;
+        var Symbol;
+        var classifiableNames;
+        var unreachableFlow = { flags: 1 /* Unreachable */ };
+        var reportedUnreachableFlow = { flags: 1 /* Unreachable */ };
+        // state used to aggregate transform flags during bind.
+        var subtreeTransformFlags = 0 /* None */;
+        var skipTransformFlagAggregation;
+        function bindSourceFile(f, opts) {
+            file = f;
+            options = opts;
+            languageVersion = ts.getEmitScriptTarget(options);
+            inStrictMode = bindInStrictMode(file, opts);
+            classifiableNames = ts.createMap();
+            symbolCount = 0;
+            skipTransformFlagAggregation = file.isDeclarationFile;
+            Symbol = ts.objectAllocator.getSymbolConstructor();
+            if (!file.locals) {
+                bind(file);
+                file.symbolCount = symbolCount;
+                file.classifiableNames = classifiableNames;
             }
-            return parseIdentifierName();
-        }
-        function parsePropertyName() {
-            return parsePropertyNameWorker(/*allowComputedPropertyNames*/ true);
-        }
-        function parseSimplePropertyName() {
-            return parsePropertyNameWorker(/*allowComputedPropertyNames*/ false);
-        }
-        function isSimplePropertyName() {
-            return token() === 9 /* StringLiteral */ || token() === 8 /* NumericLiteral */ || ts.tokenIsIdentifierOrKeyword(token());
-        }
-        function parseComputedPropertyName() {
-            // PropertyName [Yield]:
-            //      LiteralPropertyName
-            //      ComputedPropertyName[?Yield]
-            var node = createNode(140 /* ComputedPropertyName */);
-            parseExpected(19 /* OpenBracketToken */);
-            // We parse any expression (including a comma expression). But the grammar
-            // says that only an assignment expression is allowed, so the grammar checker
-            // will error if it sees a comma expression.
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(20 /* CloseBracketToken */);
-            return finishNode(node);
-        }
-        function parseContextualModifier(t) {
-            return token() === t && tryParse(nextTokenCanFollowModifier);
+            file = undefined;
+            options = undefined;
+            languageVersion = undefined;
+            parent = undefined;
+            container = undefined;
+            blockScopeContainer = undefined;
+            lastContainer = undefined;
+            seenThisKeyword = false;
+            currentFlow = undefined;
+            currentBreakTarget = undefined;
+            currentContinueTarget = undefined;
+            currentReturnTarget = undefined;
+            currentTrueTarget = undefined;
+            currentFalseTarget = undefined;
+            activeLabels = undefined;
+            hasExplicitReturn = false;
+            emitFlags = 0 /* None */;
+            subtreeTransformFlags = 0 /* None */;
         }
-        function nextTokenIsOnSameLineAndCanFollowModifier() {
-            nextToken();
-            if (scanner.hasPrecedingLineBreak()) {
-                return false;
+        return bindSourceFile;
+        function bindInStrictMode(file, opts) {
+            if ((opts.alwaysStrict === undefined ? opts.strict : opts.alwaysStrict) && !file.isDeclarationFile) {
+                // bind in strict mode source files with alwaysStrict option
+                return true;
+            }
+            else {
+                return !!file.externalModuleIndicator;
             }
-            return canFollowModifier();
         }
-        function nextTokenCanFollowModifier() {
-            if (token() === 74 /* ConstKeyword */) {
-                // 'const' is only a modifier if followed by 'enum'.
-                return nextToken() === 81 /* EnumKeyword */;
+        function createSymbol(flags, name) {
+            symbolCount++;
+            return new Symbol(flags, name);
+        }
+        function addDeclarationToSymbol(symbol, node, symbolFlags) {
+            symbol.flags |= symbolFlags;
+            node.symbol = symbol;
+            if (!symbol.declarations) {
+                symbol.declarations = [];
             }
-            if (token() === 82 /* ExportKeyword */) {
-                nextToken();
-                if (token() === 77 /* DefaultKeyword */) {
-                    return lookAhead(nextTokenIsClassOrFunctionOrAsync);
-                }
-                return token() !== 37 /* AsteriskToken */ && token() !== 116 /* AsKeyword */ && token() !== 15 /* OpenBraceToken */ && canFollowModifier();
+            symbol.declarations.push(node);
+            if (symbolFlags & 1952 /* HasExports */ && !symbol.exports) {
+                symbol.exports = ts.createMap();
             }
-            if (token() === 77 /* DefaultKeyword */) {
-                return nextTokenIsClassOrFunctionOrAsync();
+            if (symbolFlags & 6240 /* HasMembers */ && !symbol.members) {
+                symbol.members = ts.createMap();
             }
-            if (token() === 113 /* StaticKeyword */) {
-                nextToken();
-                return canFollowModifier();
+            if (symbolFlags & 107455 /* Value */) {
+                var valueDeclaration = symbol.valueDeclaration;
+                if (!valueDeclaration ||
+                    (valueDeclaration.kind !== node.kind && valueDeclaration.kind === 233 /* ModuleDeclaration */)) {
+                    // other kinds of value declarations take precedence over modules
+                    symbol.valueDeclaration = node;
+                }
             }
-            return nextTokenIsOnSameLineAndCanFollowModifier();
-        }
-        function parseAnyContextualModifier() {
-            return ts.isModifierKind(token()) && tryParse(nextTokenCanFollowModifier);
-        }
-        function canFollowModifier() {
-            return token() === 19 /* OpenBracketToken */
-                || token() === 15 /* OpenBraceToken */
-                || token() === 37 /* AsteriskToken */
-                || token() === 22 /* DotDotDotToken */
-                || isLiteralPropertyName();
-        }
-        function nextTokenIsClassOrFunctionOrAsync() {
-            nextToken();
-            return token() === 73 /* ClassKeyword */ || token() === 87 /* FunctionKeyword */ ||
-                (token() === 118 /* AsyncKeyword */ && lookAhead(nextTokenIsFunctionKeywordOnSameLine));
         }
-        // True if positioned at the start of a list element
-        function isListElement(parsingContext, inErrorRecovery) {
-            var node = currentNode(parsingContext);
-            if (node) {
-                return true;
-            }
-            switch (parsingContext) {
-                case 0 /* SourceElements */:
-                case 1 /* BlockStatements */:
-                case 3 /* SwitchClauseStatements */:
-                    // If we're in error recovery, then we don't want to treat ';' as an empty statement.
-                    // The problem is that ';' can show up in far too many contexts, and if we see one
-                    // and assume it's a statement, then we may bail out inappropriately from whatever
-                    // we're parsing.  For example, if we have a semicolon in the middle of a class, then
-                    // we really don't want to assume the class is over and we're on a statement in the
-                    // outer module.  We just want to consume and move on.
-                    return !(token() === 23 /* SemicolonToken */ && inErrorRecovery) && isStartOfStatement();
-                case 2 /* SwitchClauses */:
-                    return token() === 71 /* CaseKeyword */ || token() === 77 /* DefaultKeyword */;
-                case 4 /* TypeMembers */:
-                    return lookAhead(isTypeMemberStart);
-                case 5 /* ClassMembers */:
-                    // We allow semicolons as class elements (as specified by ES6) as long as we're
-                    // not in error recovery.  If we're in error recovery, we don't want an errant
-                    // semicolon to be treated as a class member (since they're almost always used
-                    // for statements.
-                    return lookAhead(isClassMemberStart) || (token() === 23 /* SemicolonToken */ && !inErrorRecovery);
-                case 6 /* EnumMembers */:
-                    // Include open bracket computed properties. This technically also lets in indexers,
-                    // which would be a candidate for improved error reporting.
-                    return token() === 19 /* OpenBracketToken */ || isLiteralPropertyName();
-                case 12 /* ObjectLiteralMembers */:
-                    return token() === 19 /* OpenBracketToken */ || token() === 37 /* AsteriskToken */ || isLiteralPropertyName();
-                case 9 /* ObjectBindingElements */:
-                    return token() === 19 /* OpenBracketToken */ || isLiteralPropertyName();
-                case 7 /* HeritageClauseElement */:
-                    // If we see { } then only consume it as an expression if it is followed by , or {
-                    // That way we won't consume the body of a class in its heritage clause.
-                    if (token() === 15 /* OpenBraceToken */) {
-                        return lookAhead(isValidHeritageClauseObjectLiteral);
+        // Should not be called on a declaration with a computed property name,
+        // unless it is a well known Symbol.
+        function getDeclarationName(node) {
+            var name = ts.getNameOfDeclaration(node);
+            if (name) {
+                if (ts.isAmbientModule(node)) {
+                    return ts.isGlobalScopeAugmentation(node) ? "__global" : "\"" + name.text + "\"";
+                }
+                if (name.kind === 144 /* ComputedPropertyName */) {
+                    var nameExpression = name.expression;
+                    // treat computed property names where expression is string/numeric literal as just string/numeric literal
+                    if (ts.isStringOrNumericLiteral(nameExpression)) {
+                        return nameExpression.text;
                     }
-                    if (!inErrorRecovery) {
-                        return isStartOfLeftHandSideExpression() && !isHeritageClauseExtendsOrImplementsKeyword();
+                    ts.Debug.assert(ts.isWellKnownSymbolSyntactically(nameExpression));
+                    return ts.getPropertyNameForKnownSymbolName(nameExpression.name.text);
+                }
+                return name.text;
+            }
+            switch (node.kind) {
+                case 152 /* Constructor */:
+                    return "__constructor";
+                case 160 /* FunctionType */:
+                case 155 /* CallSignature */:
+                    return "__call";
+                case 161 /* ConstructorType */:
+                case 156 /* ConstructSignature */:
+                    return "__new";
+                case 157 /* IndexSignature */:
+                    return "__index";
+                case 244 /* ExportDeclaration */:
+                    return "__export";
+                case 243 /* ExportAssignment */:
+                    return node.isExportEquals ? "export=" : "default";
+                case 194 /* BinaryExpression */:
+                    if (ts.getSpecialPropertyAssignmentKind(node) === 2 /* ModuleExports */) {
+                        // module.exports = ...
+                        return "export=";
                     }
-                    else {
-                        // If we're in error recovery we tighten up what we're willing to match.
-                        // That way we don't treat something like "this" as a valid heritage clause
-                        // element during recovery.
-                        return isIdentifier() && !isHeritageClauseExtendsOrImplementsKeyword();
+                    ts.Debug.fail("Unknown binary declaration kind");
+                    break;
+                case 228 /* FunctionDeclaration */:
+                case 229 /* ClassDeclaration */:
+                    return ts.hasModifier(node, 512 /* Default */) ? "default" : undefined;
+                case 279 /* JSDocFunctionType */:
+                    return ts.isJSDocConstructSignature(node) ? "__new" : "__call";
+                case 146 /* Parameter */:
+                    // Parameters with names are handled at the top of this function.  Parameters
+                    // without names can only come from JSDocFunctionTypes.
+                    ts.Debug.assert(node.parent.kind === 279 /* JSDocFunctionType */);
+                    var functionType = node.parent;
+                    var index = ts.indexOf(functionType.parameters, node);
+                    return "arg" + index;
+                case 291 /* JSDocTypedefTag */:
+                    var parentNode = node.parent && node.parent.parent;
+                    var nameFromParentNode = void 0;
+                    if (parentNode && parentNode.kind === 208 /* VariableStatement */) {
+                        if (parentNode.declarationList.declarations.length > 0) {
+                            var nameIdentifier = parentNode.declarationList.declarations[0].name;
+                            if (nameIdentifier.kind === 71 /* Identifier */) {
+                                nameFromParentNode = nameIdentifier.text;
+                            }
+                        }
                     }
-                case 8 /* VariableDeclarations */:
-                    return isIdentifierOrPattern();
-                case 10 /* ArrayBindingElements */:
-                    return token() === 24 /* CommaToken */ || token() === 22 /* DotDotDotToken */ || isIdentifierOrPattern();
-                case 17 /* TypeParameters */:
-                    return isIdentifier();
-                case 11 /* ArgumentExpressions */:
-                case 15 /* ArrayLiteralMembers */:
-                    return token() === 24 /* CommaToken */ || token() === 22 /* DotDotDotToken */ || isStartOfExpression();
-                case 16 /* Parameters */:
-                    return isStartOfParameter();
-                case 18 /* TypeArguments */:
-                case 19 /* TupleElementTypes */:
-                    return token() === 24 /* CommaToken */ || isStartOfType();
-                case 20 /* HeritageClauses */:
-                    return isHeritageClause();
-                case 21 /* ImportOrExportSpecifiers */:
-                    return ts.tokenIsIdentifierOrKeyword(token());
-                case 13 /* JsxAttributes */:
-                    return ts.tokenIsIdentifierOrKeyword(token()) || token() === 15 /* OpenBraceToken */;
-                case 14 /* JsxChildren */:
-                    return true;
-                case 22 /* JSDocFunctionParameters */:
-                case 23 /* JSDocTypeArguments */:
-                case 25 /* JSDocTupleTypes */:
-                    return JSDocParser.isJSDocType();
-                case 24 /* JSDocRecordMembers */:
-                    return isSimplePropertyName();
-            }
-            ts.Debug.fail("Non-exhaustive case in 'isListElement'.");
-        }
-        function isValidHeritageClauseObjectLiteral() {
-            ts.Debug.assert(token() === 15 /* OpenBraceToken */);
-            if (nextToken() === 16 /* CloseBraceToken */) {
-                // if we see  "extends {}" then only treat the {} as what we're extending (and not
-                // the class body) if we have:
-                //
-                //      extends {} {
-                //      extends {},
-                //      extends {} extends
-                //      extends {} implements
-                var next = nextToken();
-                return next === 24 /* CommaToken */ || next === 15 /* OpenBraceToken */ || next === 83 /* ExtendsKeyword */ || next === 106 /* ImplementsKeyword */;
-            }
-            return true;
-        }
-        function nextTokenIsIdentifier() {
-            nextToken();
-            return isIdentifier();
-        }
-        function nextTokenIsIdentifierOrKeyword() {
-            nextToken();
-            return ts.tokenIsIdentifierOrKeyword(token());
-        }
-        function isHeritageClauseExtendsOrImplementsKeyword() {
-            if (token() === 106 /* ImplementsKeyword */ ||
-                token() === 83 /* ExtendsKeyword */) {
-                return lookAhead(nextTokenIsStartOfExpression);
+                    return nameFromParentNode;
             }
-            return false;
-        }
-        function nextTokenIsStartOfExpression() {
-            nextToken();
-            return isStartOfExpression();
         }
-        // True if positioned at a list terminator
-        function isListTerminator(kind) {
-            if (token() === 1 /* EndOfFileToken */) {
-                // Being at the end of the file ends all lists.
-                return true;
-            }
-            switch (kind) {
-                case 1 /* BlockStatements */:
-                case 2 /* SwitchClauses */:
-                case 4 /* TypeMembers */:
-                case 5 /* ClassMembers */:
-                case 6 /* EnumMembers */:
-                case 12 /* ObjectLiteralMembers */:
-                case 9 /* ObjectBindingElements */:
-                case 21 /* ImportOrExportSpecifiers */:
-                    return token() === 16 /* CloseBraceToken */;
-                case 3 /* SwitchClauseStatements */:
-                    return token() === 16 /* CloseBraceToken */ || token() === 71 /* CaseKeyword */ || token() === 77 /* DefaultKeyword */;
-                case 7 /* HeritageClauseElement */:
-                    return token() === 15 /* OpenBraceToken */ || token() === 83 /* ExtendsKeyword */ || token() === 106 /* ImplementsKeyword */;
-                case 8 /* VariableDeclarations */:
-                    return isVariableDeclaratorListTerminator();
-                case 17 /* TypeParameters */:
-                    // Tokens other than '>' are here for better error recovery
-                    return token() === 27 /* GreaterThanToken */ || token() === 17 /* OpenParenToken */ || token() === 15 /* OpenBraceToken */ || token() === 83 /* ExtendsKeyword */ || token() === 106 /* ImplementsKeyword */;
-                case 11 /* ArgumentExpressions */:
-                    // Tokens other than ')' are here for better error recovery
-                    return token() === 18 /* CloseParenToken */ || token() === 23 /* SemicolonToken */;
-                case 15 /* ArrayLiteralMembers */:
-                case 19 /* TupleElementTypes */:
-                case 10 /* ArrayBindingElements */:
-                    return token() === 20 /* CloseBracketToken */;
-                case 16 /* Parameters */:
-                    // Tokens other than ')' and ']' (the latter for index signatures) are here for better error recovery
-                    return token() === 18 /* CloseParenToken */ || token() === 20 /* CloseBracketToken */ /*|| token === SyntaxKind.OpenBraceToken*/;
-                case 18 /* TypeArguments */:
-                    // Tokens other than '>' are here for better error recovery
-                    return token() === 27 /* GreaterThanToken */ || token() === 17 /* OpenParenToken */;
-                case 20 /* HeritageClauses */:
-                    return token() === 15 /* OpenBraceToken */ || token() === 16 /* CloseBraceToken */;
-                case 13 /* JsxAttributes */:
-                    return token() === 27 /* GreaterThanToken */ || token() === 39 /* SlashToken */;
-                case 14 /* JsxChildren */:
-                    return token() === 25 /* LessThanToken */ && lookAhead(nextTokenIsSlash);
-                case 22 /* JSDocFunctionParameters */:
-                    return token() === 18 /* CloseParenToken */ || token() === 54 /* ColonToken */ || token() === 16 /* CloseBraceToken */;
-                case 23 /* JSDocTypeArguments */:
-                    return token() === 27 /* GreaterThanToken */ || token() === 16 /* CloseBraceToken */;
-                case 25 /* JSDocTupleTypes */:
-                    return token() === 20 /* CloseBracketToken */ || token() === 16 /* CloseBraceToken */;
-                case 24 /* JSDocRecordMembers */:
-                    return token() === 16 /* CloseBraceToken */;
-            }
+        function getDisplayName(node) {
+            return node.name ? ts.declarationNameToString(node.name) : getDeclarationName(node);
         }
-        function isVariableDeclaratorListTerminator() {
-            // If we can consume a semicolon (either explicitly, or with ASI), then consider us done
-            // with parsing the list of  variable declarators.
-            if (canParseSemicolon()) {
-                return true;
-            }
-            // in the case where we're parsing the variable declarator of a 'for-in' statement, we
-            // are done if we see an 'in' keyword in front of us. Same with for-of
-            if (isInOrOfKeyword(token())) {
-                return true;
-            }
-            // ERROR RECOVERY TWEAK:
-            // For better error recovery, if we see an '=>' then we just stop immediately.  We've got an
-            // arrow function here and it's going to be very unlikely that we'll resynchronize and get
-            // another variable declaration.
-            if (token() === 34 /* EqualsGreaterThanToken */) {
-                return true;
+        /**
+         * Declares a Symbol for the node and adds it to symbols. Reports errors for conflicting identifier names.
+         * @param symbolTable - The symbol table which node will be added to.
+         * @param parent - node's parent declaration.
+         * @param node - The declaration to be added to the symbol table
+         * @param includes - The SymbolFlags that node has in addition to its declaration type (eg: export, ambient, etc.)
+         * @param excludes - The flags which node cannot be declared alongside in a symbol table. Used to report forbidden declarations.
+         */
+        function declareSymbol(symbolTable, parent, node, includes, excludes) {
+            ts.Debug.assert(!ts.hasDynamicName(node));
+            var isDefaultExport = ts.hasModifier(node, 512 /* Default */);
+            // The exported symbol for an export default function/class node is always named "default"
+            var name = isDefaultExport && parent ? "default" : getDeclarationName(node);
+            var symbol;
+            if (name === undefined) {
+                symbol = createSymbol(0 /* None */, "__missing");
             }
-            // Keep trying to parse out variable declarators.
-            return false;
-        }
-        // True if positioned at element or terminator of the current list or any enclosing list
-        function isInSomeParsingContext() {
-            for (var kind = 0; kind < 26 /* Count */; kind++) {
-                if (parsingContext & (1 << kind)) {
-                    if (isListElement(kind, /*inErrorRecovery*/ true) || isListTerminator(kind)) {
-                        return true;
+            else {
+                // Check and see if the symbol table already has a symbol with this name.  If not,
+                // create a new symbol with this name and add it to the table.  Note that we don't
+                // give the new symbol any flags *yet*.  This ensures that it will not conflict
+                // with the 'excludes' flags we pass in.
+                //
+                // If we do get an existing symbol, see if it conflicts with the new symbol we're
+                // creating.  For example, a 'var' symbol and a 'class' symbol will conflict within
+                // the same symbol table.  If we have a conflict, report the issue on each
+                // declaration we have for this symbol, and then create a new symbol for this
+                // declaration.
+                //
+                // Note that when properties declared in Javascript constructors
+                // (marked by isReplaceableByMethod) conflict with another symbol, the property loses.
+                // Always. This allows the common Javascript pattern of overwriting a prototype method
+                // with an bound instance method of the same type: `this.method = this.method.bind(this)`
+                //
+                // If we created a new symbol, either because we didn't have a symbol with this name
+                // in the symbol table, or we conflicted with an existing symbol, then just add this
+                // node as the sole declaration of the new symbol.
+                //
+                // Otherwise, we'll be merging into a compatible existing symbol (for example when
+                // you have multiple 'vars' with the same name in the same container).  In this case
+                // just add this node into the declarations list of the symbol.
+                symbol = symbolTable.get(name);
+                if (!symbol) {
+                    symbolTable.set(name, symbol = createSymbol(0 /* None */, name));
+                }
+                if (name && (includes & 788448 /* Classifiable */)) {
+                    classifiableNames.set(name, name);
+                }
+                if (symbol.flags & excludes) {
+                    if (symbol.isReplaceableByMethod) {
+                        // Javascript constructor-declared symbols can be discarded in favor of
+                        // prototype symbols like methods.
+                        symbolTable.set(name, symbol = createSymbol(0 /* None */, name));
+                    }
+                    else {
+                        if (node.name) {
+                            node.name.parent = node;
+                        }
+                        // Report errors every position with duplicate declaration
+                        // Report errors on previous encountered declarations
+                        var message_1 = symbol.flags & 2 /* BlockScopedVariable */
+                            ? ts.Diagnostics.Cannot_redeclare_block_scoped_variable_0
+                            : ts.Diagnostics.Duplicate_identifier_0;
+                        if (symbol.declarations && symbol.declarations.length) {
+                            // If the current node is a default export of some sort, then check if
+                            // there are any other default exports that we need to error on.
+                            // We'll know whether we have other default exports depending on if `symbol` already has a declaration list set.
+                            if (isDefaultExport) {
+                                message_1 = ts.Diagnostics.A_module_cannot_have_multiple_default_exports;
+                            }
+                            else {
+                                // This is to properly report an error in the case "export default { }" is after export default of class declaration or function declaration.
+                                // Error on multiple export default in the following case:
+                                // 1. multiple export default of class declaration or function declaration by checking NodeFlags.Default
+                                // 2. multiple export default of export assignment. This one doesn't have NodeFlags.Default on (as export default doesn't considered as modifiers)
+                                if (symbol.declarations && symbol.declarations.length &&
+                                    (isDefaultExport || (node.kind === 243 /* ExportAssignment */ && !node.isExportEquals))) {
+                                    message_1 = ts.Diagnostics.A_module_cannot_have_multiple_default_exports;
+                                }
+                            }
+                        }
+                        ts.forEach(symbol.declarations, function (declaration) {
+                            file.bindDiagnostics.push(ts.createDiagnosticForNode(ts.getNameOfDeclaration(declaration) || declaration, message_1, getDisplayName(declaration)));
+                        });
+                        file.bindDiagnostics.push(ts.createDiagnosticForNode(ts.getNameOfDeclaration(node) || node, message_1, getDisplayName(node)));
+                        symbol = createSymbol(0 /* None */, name);
                     }
                 }
             }
-            return false;
+            addDeclarationToSymbol(symbol, node, includes);
+            symbol.parent = parent;
+            return symbol;
         }
-        // Parses a list of elements
-        function parseList(kind, parseElement) {
-            var saveParsingContext = parsingContext;
-            parsingContext |= 1 << kind;
-            var result = createNodeArray();
-            while (!isListTerminator(kind)) {
-                if (isListElement(kind, /*inErrorRecovery*/ false)) {
-                    var element = parseListElement(kind, parseElement);
-                    result.push(element);
-                    continue;
+        function declareModuleMember(node, symbolFlags, symbolExcludes) {
+            var hasExportModifier = ts.getCombinedModifierFlags(node) & 1 /* Export */;
+            if (symbolFlags & 8388608 /* Alias */) {
+                if (node.kind === 246 /* ExportSpecifier */ || (node.kind === 237 /* ImportEqualsDeclaration */ && hasExportModifier)) {
+                    return declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
                 }
-                if (abortParsingListOrMoveToNextToken(kind)) {
-                    break;
+                else {
+                    return declareSymbol(container.locals, /*parent*/ undefined, node, symbolFlags, symbolExcludes);
                 }
             }
-            result.end = getNodeEnd();
-            parsingContext = saveParsingContext;
-            return result;
-        }
-        function parseListElement(parsingContext, parseElement) {
-            var node = currentNode(parsingContext);
-            if (node) {
-                return consumeNode(node);
+            else {
+                // Exported module members are given 2 symbols: A local symbol that is classified with an ExportValue,
+                // ExportType, or ExportContainer flag, and an associated export symbol with all the correct flags set
+                // on it. There are 2 main reasons:
+                //
+                //   1. We treat locals and exports of the same name as mutually exclusive within a container.
+                //      That means the binder will issue a Duplicate Identifier error if you mix locals and exports
+                //      with the same name in the same container.
+                //      TODO: Make this a more specific error and decouple it from the exclusion logic.
+                //   2. When we checkIdentifier in the checker, we set its resolved symbol to the local symbol,
+                //      but return the export symbol (by calling getExportSymbolOfValueSymbolIfExported). That way
+                //      when the emitter comes back to it, it knows not to qualify the name if it was found in a containing scope.
+                // NOTE: Nested ambient modules always should go to to 'locals' table to prevent their automatic merge
+                //       during global merging in the checker. Why? The only case when ambient module is permitted inside another module is module augmentation
+                //       and this case is specially handled. Module augmentations should only be merged with original module definition
+                //       and should never be merged directly with other augmentation, and the latter case would be possible if automatic merge is allowed.
+                if (node.kind === 291 /* JSDocTypedefTag */)
+                    ts.Debug.assert(ts.isInJavaScriptFile(node)); // We shouldn't add symbols for JSDoc nodes if not in a JS file.
+                var isJSDocTypedefInJSDocNamespace = node.kind === 291 /* JSDocTypedefTag */ &&
+                    node.name &&
+                    node.name.kind === 71 /* Identifier */ &&
+                    node.name.isInJSDocNamespace;
+                if ((!ts.isAmbientModule(node) && (hasExportModifier || container.flags & 32 /* ExportContext */)) || isJSDocTypedefInJSDocNamespace) {
+                    var exportKind = (symbolFlags & 107455 /* Value */ ? 1048576 /* ExportValue */ : 0) |
+                        (symbolFlags & 793064 /* Type */ ? 2097152 /* ExportType */ : 0) |
+                        (symbolFlags & 1920 /* Namespace */ ? 4194304 /* ExportNamespace */ : 0);
+                    var local = declareSymbol(container.locals, /*parent*/ undefined, node, exportKind, symbolExcludes);
+                    local.exportSymbol = declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
+                    node.localSymbol = local;
+                    return local;
+                }
+                else {
+                    return declareSymbol(container.locals, /*parent*/ undefined, node, symbolFlags, symbolExcludes);
+                }
             }
-            return parseElement();
         }
-        function currentNode(parsingContext) {
-            // If there is an outstanding parse error that we've encountered, but not attached to
-            // some node, then we cannot get a node from the old source tree.  This is because we
-            // want to mark the next node we encounter as being unusable.
-            //
-            // Note: This may be too conservative.  Perhaps we could reuse the node and set the bit
-            // on it (or its leftmost child) as having the error.  For now though, being conservative
-            // is nice and likely won't ever affect perf.
-            if (parseErrorBeforeNextFinishedNode) {
-                return undefined;
-            }
-            if (!syntaxCursor) {
-                // if we don't have a cursor, we could never return a node from the old tree.
-                return undefined;
-            }
-            var node = syntaxCursor.currentNode(scanner.getStartPos());
-            // Can't reuse a missing node.
-            if (ts.nodeIsMissing(node)) {
-                return undefined;
-            }
-            // Can't reuse a node that intersected the change range.
-            if (node.intersectsChange) {
-                return undefined;
-            }
-            // Can't reuse a node that contains a parse error.  This is necessary so that we
-            // produce the same set of errors again.
-            if (ts.containsParseError(node)) {
-                return undefined;
-            }
-            // We can only reuse a node if it was parsed under the same strict mode that we're
-            // currently in.  i.e. if we originally parsed a node in non-strict mode, but then
-            // the user added 'using strict' at the top of the file, then we can't use that node
-            // again as the presence of strict mode may cause us to parse the tokens in the file
-            // differently.
+        // All container nodes are kept on a linked list in declaration order. This list is used by
+        // the getLocalNameOfContainer function in the type checker to validate that the local name
+        // used for a container is unique.
+        function bindContainer(node, containerFlags) {
+            // Before we recurse into a node's children, we first save the existing parent, container
+            // and block-container.  Then after we pop out of processing the children, we restore
+            // these saved values.
+            var saveContainer = container;
+            var savedBlockScopeContainer = blockScopeContainer;
+            // Depending on what kind of node this is, we may have to adjust the current container
+            // and block-container.   If the current node is a container, then it is automatically
+            // considered the current block-container as well.  Also, for containers that we know
+            // may contain locals, we proactively initialize the .locals field. We do this because
+            // it's highly likely that the .locals will be needed to place some child in (for example,
+            // a parameter, or variable declaration).
             //
-            // Note: we *can* reuse tokens when the strict mode changes.  That's because tokens
-            // are unaffected by strict mode.  It's just the parser will decide what to do with it
-            // differently depending on what mode it is in.
+            // However, we do not proactively create the .locals for block-containers because it's
+            // totally normal and common for block-containers to never actually have a block-scoped
+            // variable in them.  We don't want to end up allocating an object for every 'block' we
+            // run into when most of them won't be necessary.
             //
-            // This also applies to all our other context flags as well.
-            var nodeContextFlags = node.flags & 1540096 /* ContextFlags */;
-            if (nodeContextFlags !== contextFlags) {
-                return undefined;
-            }
-            // Ok, we have a node that looks like it could be reused.  Now verify that it is valid
-            // in the current list parsing context that we're currently at.
-            if (!canReuseNode(node, parsingContext)) {
-                return undefined;
+            // Finally, if this is a block-container, then we clear out any existing .locals object
+            // it may contain within it.  This happens in incremental scenarios.  Because we can be
+            // reusing a node from a previous compilation, that node may have had 'locals' created
+            // for it.  We must clear this so we don't accidentally move any stale data forward from
+            // a previous compilation.
+            if (containerFlags & 1 /* IsContainer */) {
+                container = blockScopeContainer = node;
+                if (containerFlags & 32 /* HasLocals */) {
+                    container.locals = ts.createMap();
+                }
+                addToContainerChain(container);
             }
-            return node;
-        }
-        function consumeNode(node) {
-            // Move the scanner so it is after the node we just consumed.
-            scanner.setTextPos(node.end);
-            nextToken();
-            return node;
-        }
-        function canReuseNode(node, parsingContext) {
-            switch (parsingContext) {
-                case 5 /* ClassMembers */:
-                    return isReusableClassMember(node);
-                case 2 /* SwitchClauses */:
-                    return isReusableSwitchClause(node);
-                case 0 /* SourceElements */:
-                case 1 /* BlockStatements */:
-                case 3 /* SwitchClauseStatements */:
-                    return isReusableStatement(node);
-                case 6 /* EnumMembers */:
-                    return isReusableEnumMember(node);
-                case 4 /* TypeMembers */:
-                    return isReusableTypeMember(node);
-                case 8 /* VariableDeclarations */:
-                    return isReusableVariableDeclaration(node);
-                case 16 /* Parameters */:
-                    return isReusableParameter(node);
-                // Any other lists we do not care about reusing nodes in.  But feel free to add if
-                // you can do so safely.  Danger areas involve nodes that may involve speculative
-                // parsing.  If speculative parsing is involved with the node, then the range the
-                // parser reached while looking ahead might be in the edited range (see the example
-                // in canReuseVariableDeclaratorNode for a good case of this).
-                case 20 /* HeritageClauses */:
-                // This would probably be safe to reuse.  There is no speculative parsing with
-                // heritage clauses.
-                case 17 /* TypeParameters */:
-                // This would probably be safe to reuse.  There is no speculative parsing with
-                // type parameters.  Note that that's because type *parameters* only occur in
-                // unambiguous *type* contexts.  While type *arguments* occur in very ambiguous
-                // *expression* contexts.
-                case 19 /* TupleElementTypes */:
-                // This would probably be safe to reuse.  There is no speculative parsing with
-                // tuple types.
-                // Technically, type argument list types are probably safe to reuse.  While
-                // speculative parsing is involved with them (since type argument lists are only
-                // produced from speculative parsing a < as a type argument list), we only have
-                // the types because speculative parsing succeeded.  Thus, the lookahead never
-                // went past the end of the list and rewound.
-                case 18 /* TypeArguments */:
-                // Note: these are almost certainly not safe to ever reuse.  Expressions commonly
-                // need a large amount of lookahead, and we should not reuse them as they may
-                // have actually intersected the edit.
-                case 11 /* ArgumentExpressions */:
-                // This is not safe to reuse for the same reason as the 'AssignmentExpression'
-                // cases.  i.e. a property assignment may end with an expression, and thus might
-                // have lookahead far beyond it's old node.
-                case 12 /* ObjectLiteralMembers */:
-                // This is probably not safe to reuse.  There can be speculative parsing with
-                // type names in a heritage clause.  There can be generic names in the type
-                // name list, and there can be left hand side expressions (which can have type
-                // arguments.)
-                case 7 /* HeritageClauseElement */:
-                // Perhaps safe to reuse, but it's unlikely we'd see more than a dozen attributes
-                // on any given element. Same for children.
-                case 13 /* JsxAttributes */:
-                case 14 /* JsxChildren */:
+            else if (containerFlags & 2 /* IsBlockScopedContainer */) {
+                blockScopeContainer = node;
+                blockScopeContainer.locals = undefined;
             }
-            return false;
-        }
-        function isReusableClassMember(node) {
-            if (node) {
-                switch (node.kind) {
-                    case 148 /* Constructor */:
-                    case 153 /* IndexSignature */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                    case 145 /* PropertyDeclaration */:
-                    case 198 /* SemicolonClassElement */:
-                        return true;
-                    case 147 /* MethodDeclaration */:
-                        // Method declarations are not necessarily reusable.  An object-literal
-                        // may have a method calls "constructor(...)" and we must reparse that
-                        // into an actual .ConstructorDeclaration.
-                        var methodDeclaration = node;
-                        var nameIsConstructor = methodDeclaration.name.kind === 69 /* Identifier */ &&
-                            methodDeclaration.name.originalKeywordKind === 121 /* ConstructorKeyword */;
-                        return !nameIsConstructor;
+            if (containerFlags & 4 /* IsControlFlowContainer */) {
+                var saveCurrentFlow = currentFlow;
+                var saveBreakTarget = currentBreakTarget;
+                var saveContinueTarget = currentContinueTarget;
+                var saveReturnTarget = currentReturnTarget;
+                var saveActiveLabels = activeLabels;
+                var saveHasExplicitReturn = hasExplicitReturn;
+                var isIIFE = containerFlags & 16 /* IsFunctionExpression */ && !ts.hasModifier(node, 256 /* Async */) && !!ts.getImmediatelyInvokedFunctionExpression(node);
+                // A non-async IIFE is considered part of the containing control flow. Return statements behave
+                // similarly to break statements that exit to a label just past the statement body.
+                if (isIIFE) {
+                    currentReturnTarget = createBranchLabel();
                 }
-            }
-            return false;
-        }
-        function isReusableSwitchClause(node) {
-            if (node) {
-                switch (node.kind) {
-                    case 249 /* CaseClause */:
-                    case 250 /* DefaultClause */:
-                        return true;
+                else {
+                    currentFlow = { flags: 2 /* Start */ };
+                    if (containerFlags & (16 /* IsFunctionExpression */ | 128 /* IsObjectLiteralOrClassExpressionMethod */)) {
+                        currentFlow.container = node;
+                    }
+                    currentReturnTarget = undefined;
                 }
-            }
-            return false;
-        }
-        function isReusableStatement(node) {
-            if (node) {
-                switch (node.kind) {
-                    case 220 /* FunctionDeclaration */:
-                    case 200 /* VariableStatement */:
-                    case 199 /* Block */:
-                    case 203 /* IfStatement */:
-                    case 202 /* ExpressionStatement */:
-                    case 215 /* ThrowStatement */:
-                    case 211 /* ReturnStatement */:
-                    case 213 /* SwitchStatement */:
-                    case 210 /* BreakStatement */:
-                    case 209 /* ContinueStatement */:
-                    case 207 /* ForInStatement */:
-                    case 208 /* ForOfStatement */:
-                    case 206 /* ForStatement */:
-                    case 205 /* WhileStatement */:
-                    case 212 /* WithStatement */:
-                    case 201 /* EmptyStatement */:
-                    case 216 /* TryStatement */:
-                    case 214 /* LabeledStatement */:
-                    case 204 /* DoStatement */:
-                    case 217 /* DebuggerStatement */:
-                    case 230 /* ImportDeclaration */:
-                    case 229 /* ImportEqualsDeclaration */:
-                    case 236 /* ExportDeclaration */:
-                    case 235 /* ExportAssignment */:
-                    case 225 /* ModuleDeclaration */:
-                    case 221 /* ClassDeclaration */:
-                    case 222 /* InterfaceDeclaration */:
-                    case 224 /* EnumDeclaration */:
-                    case 223 /* TypeAliasDeclaration */:
-                        return true;
+                currentBreakTarget = undefined;
+                currentContinueTarget = undefined;
+                activeLabels = undefined;
+                hasExplicitReturn = false;
+                bindChildren(node);
+                // Reset all reachability check related flags on node (for incremental scenarios)
+                node.flags &= ~1408 /* ReachabilityAndEmitFlags */;
+                if (!(currentFlow.flags & 1 /* Unreachable */) && containerFlags & 8 /* IsFunctionLike */ && ts.nodeIsPresent(node.body)) {
+                    node.flags |= 128 /* HasImplicitReturn */;
+                    if (hasExplicitReturn)
+                        node.flags |= 256 /* HasExplicitReturn */;
                 }
-            }
-            return false;
-        }
-        function isReusableEnumMember(node) {
-            return node.kind === 255 /* EnumMember */;
-        }
-        function isReusableTypeMember(node) {
-            if (node) {
-                switch (node.kind) {
-                    case 152 /* ConstructSignature */:
-                    case 146 /* MethodSignature */:
-                    case 153 /* IndexSignature */:
-                    case 144 /* PropertySignature */:
-                    case 151 /* CallSignature */:
-                        return true;
+                if (node.kind === 265 /* SourceFile */) {
+                    node.flags |= emitFlags;
+                }
+                if (isIIFE) {
+                    addAntecedent(currentReturnTarget, currentFlow);
+                    currentFlow = finishFlowLabel(currentReturnTarget);
+                }
+                else {
+                    currentFlow = saveCurrentFlow;
                 }
+                currentBreakTarget = saveBreakTarget;
+                currentContinueTarget = saveContinueTarget;
+                currentReturnTarget = saveReturnTarget;
+                activeLabels = saveActiveLabels;
+                hasExplicitReturn = saveHasExplicitReturn;
             }
-            return false;
-        }
-        function isReusableVariableDeclaration(node) {
-            if (node.kind !== 218 /* VariableDeclaration */) {
-                return false;
+            else if (containerFlags & 64 /* IsInterface */) {
+                seenThisKeyword = false;
+                bindChildren(node);
+                node.flags = seenThisKeyword ? node.flags | 64 /* ContainsThis */ : node.flags & ~64 /* ContainsThis */;
             }
-            // Very subtle incremental parsing bug.  Consider the following code:
-            //
-            //      let v = new List < A, B
-            //
-            // This is actually legal code.  It's a list of variable declarators "v = new List<A"
-            // on one side and "B" on the other. If you then change that to:
-            //
-            //      let v = new List < A, B >()
-            //
-            // then we have a problem.  "v = new List<A" doesn't intersect the change range, so we
-            // start reparsing at "B" and we completely fail to handle this properly.
-            //
-            // In order to prevent this, we do not allow a variable declarator to be reused if it
-            // has an initializer.
-            var variableDeclarator = node;
-            return variableDeclarator.initializer === undefined;
-        }
-        function isReusableParameter(node) {
-            if (node.kind !== 142 /* Parameter */) {
-                return false;
+            else {
+                bindChildren(node);
             }
-            // See the comment in isReusableVariableDeclaration for why we do this.
-            var parameter = node;
-            return parameter.initializer === undefined;
+            container = saveContainer;
+            blockScopeContainer = savedBlockScopeContainer;
         }
-        // Returns true if we should abort parsing.
-        function abortParsingListOrMoveToNextToken(kind) {
-            parseErrorAtCurrentToken(parsingContextErrors(kind));
-            if (isInSomeParsingContext()) {
-                return true;
+        function bindChildren(node) {
+            if (skipTransformFlagAggregation) {
+                bindChildrenWorker(node);
+            }
+            else if (node.transformFlags & 536870912 /* HasComputedFlags */) {
+                skipTransformFlagAggregation = true;
+                bindChildrenWorker(node);
+                skipTransformFlagAggregation = false;
+                subtreeTransformFlags |= node.transformFlags & ~getTransformFlagsSubtreeExclusions(node.kind);
+            }
+            else {
+                var savedSubtreeTransformFlags = subtreeTransformFlags;
+                subtreeTransformFlags = 0;
+                bindChildrenWorker(node);
+                subtreeTransformFlags = savedSubtreeTransformFlags | computeTransformFlagsForNode(node, subtreeTransformFlags);
             }
-            nextToken();
-            return false;
         }
-        function parsingContextErrors(context) {
-            switch (context) {
-                case 0 /* SourceElements */: return ts.Diagnostics.Declaration_or_statement_expected;
-                case 1 /* BlockStatements */: return ts.Diagnostics.Declaration_or_statement_expected;
-                case 2 /* SwitchClauses */: return ts.Diagnostics.case_or_default_expected;
-                case 3 /* SwitchClauseStatements */: return ts.Diagnostics.Statement_expected;
-                case 4 /* TypeMembers */: return ts.Diagnostics.Property_or_signature_expected;
-                case 5 /* ClassMembers */: return ts.Diagnostics.Unexpected_token_A_constructor_method_accessor_or_property_was_expected;
-                case 6 /* EnumMembers */: return ts.Diagnostics.Enum_member_expected;
-                case 7 /* HeritageClauseElement */: return ts.Diagnostics.Expression_expected;
-                case 8 /* VariableDeclarations */: return ts.Diagnostics.Variable_declaration_expected;
-                case 9 /* ObjectBindingElements */: return ts.Diagnostics.Property_destructuring_pattern_expected;
-                case 10 /* ArrayBindingElements */: return ts.Diagnostics.Array_element_destructuring_pattern_expected;
-                case 11 /* ArgumentExpressions */: return ts.Diagnostics.Argument_expression_expected;
-                case 12 /* ObjectLiteralMembers */: return ts.Diagnostics.Property_assignment_expected;
-                case 15 /* ArrayLiteralMembers */: return ts.Diagnostics.Expression_or_comma_expected;
-                case 16 /* Parameters */: return ts.Diagnostics.Parameter_declaration_expected;
-                case 17 /* TypeParameters */: return ts.Diagnostics.Type_parameter_declaration_expected;
-                case 18 /* TypeArguments */: return ts.Diagnostics.Type_argument_expected;
-                case 19 /* TupleElementTypes */: return ts.Diagnostics.Type_expected;
-                case 20 /* HeritageClauses */: return ts.Diagnostics.Unexpected_token_expected;
-                case 21 /* ImportOrExportSpecifiers */: return ts.Diagnostics.Identifier_expected;
-                case 13 /* JsxAttributes */: return ts.Diagnostics.Identifier_expected;
-                case 14 /* JsxChildren */: return ts.Diagnostics.Identifier_expected;
-                case 22 /* JSDocFunctionParameters */: return ts.Diagnostics.Parameter_declaration_expected;
-                case 23 /* JSDocTypeArguments */: return ts.Diagnostics.Type_argument_expected;
-                case 25 /* JSDocTupleTypes */: return ts.Diagnostics.Type_expected;
-                case 24 /* JSDocRecordMembers */: return ts.Diagnostics.Property_assignment_expected;
+        function bindEach(nodes) {
+            if (nodes === undefined) {
+                return;
+            }
+            if (skipTransformFlagAggregation) {
+                ts.forEach(nodes, bind);
+            }
+            else {
+                var savedSubtreeTransformFlags = subtreeTransformFlags;
+                subtreeTransformFlags = 0 /* None */;
+                var nodeArrayFlags = 0 /* None */;
+                for (var _i = 0, nodes_2 = nodes; _i < nodes_2.length; _i++) {
+                    var node = nodes_2[_i];
+                    bind(node);
+                    nodeArrayFlags |= node.transformFlags & ~536870912 /* HasComputedFlags */;
+                }
+                nodes.transformFlags = nodeArrayFlags | 536870912 /* HasComputedFlags */;
+                subtreeTransformFlags |= savedSubtreeTransformFlags;
             }
         }
-        ;
-        // Parses a comma-delimited list of elements
-        function parseDelimitedList(kind, parseElement, considerSemicolonAsDelimiter) {
-            var saveParsingContext = parsingContext;
-            parsingContext |= 1 << kind;
-            var result = createNodeArray();
-            var commaStart = -1; // Meaning the previous token was not a comma
-            while (true) {
-                if (isListElement(kind, /*inErrorRecovery*/ false)) {
-                    result.push(parseListElement(kind, parseElement));
-                    commaStart = scanner.getTokenPos();
-                    if (parseOptional(24 /* CommaToken */)) {
-                        continue;
-                    }
-                    commaStart = -1; // Back to the state where the last token was not a comma
-                    if (isListTerminator(kind)) {
-                        break;
+        function bindEachChild(node) {
+            ts.forEachChild(node, bind, bindEach);
+        }
+        function bindChildrenWorker(node) {
+            // Binding of JsDocComment should be done before the current block scope container changes.
+            // because the scope of JsDocComment should not be affected by whether the current node is a
+            // container or not.
+            if (node.jsDoc) {
+                if (ts.isInJavaScriptFile(node)) {
+                    for (var _i = 0, _a = node.jsDoc; _i < _a.length; _i++) {
+                        var j = _a[_i];
+                        bind(j);
                     }
-                    // We didn't get a comma, and the list wasn't terminated, explicitly parse
-                    // out a comma so we give a good error message.
-                    parseExpected(24 /* CommaToken */);
-                    // If the token was a semicolon, and the caller allows that, then skip it and
-                    // continue.  This ensures we get back on track and don't result in tons of
-                    // parse errors.  For example, this can happen when people do things like use
-                    // a semicolon to delimit object literal members.   Note: we'll have already
-                    // reported an error when we called parseExpected above.
-                    if (considerSemicolonAsDelimiter && token() === 23 /* SemicolonToken */ && !scanner.hasPrecedingLineBreak()) {
-                        nextToken();
+                }
+                else {
+                    for (var _b = 0, _c = node.jsDoc; _b < _c.length; _b++) {
+                        var j = _c[_b];
+                        setParentPointers(node, j);
                     }
-                    continue;
                 }
-                if (isListTerminator(kind)) {
+            }
+            if (checkUnreachable(node)) {
+                bindEachChild(node);
+                return;
+            }
+            switch (node.kind) {
+                case 213 /* WhileStatement */:
+                    bindWhileStatement(node);
                     break;
-                }
-                if (abortParsingListOrMoveToNextToken(kind)) {
+                case 212 /* DoStatement */:
+                    bindDoStatement(node);
+                    break;
+                case 214 /* ForStatement */:
+                    bindForStatement(node);
+                    break;
+                case 215 /* ForInStatement */:
+                case 216 /* ForOfStatement */:
+                    bindForInOrForOfStatement(node);
+                    break;
+                case 211 /* IfStatement */:
+                    bindIfStatement(node);
+                    break;
+                case 219 /* ReturnStatement */:
+                case 223 /* ThrowStatement */:
+                    bindReturnOrThrow(node);
+                    break;
+                case 218 /* BreakStatement */:
+                case 217 /* ContinueStatement */:
+                    bindBreakOrContinueStatement(node);
+                    break;
+                case 224 /* TryStatement */:
+                    bindTryStatement(node);
+                    break;
+                case 221 /* SwitchStatement */:
+                    bindSwitchStatement(node);
+                    break;
+                case 235 /* CaseBlock */:
+                    bindCaseBlock(node);
+                    break;
+                case 257 /* CaseClause */:
+                    bindCaseClause(node);
+                    break;
+                case 222 /* LabeledStatement */:
+                    bindLabeledStatement(node);
+                    break;
+                case 192 /* PrefixUnaryExpression */:
+                    bindPrefixUnaryExpressionFlow(node);
+                    break;
+                case 193 /* PostfixUnaryExpression */:
+                    bindPostfixUnaryExpressionFlow(node);
+                    break;
+                case 194 /* BinaryExpression */:
+                    bindBinaryExpressionFlow(node);
+                    break;
+                case 188 /* DeleteExpression */:
+                    bindDeleteExpressionFlow(node);
+                    break;
+                case 195 /* ConditionalExpression */:
+                    bindConditionalExpressionFlow(node);
+                    break;
+                case 226 /* VariableDeclaration */:
+                    bindVariableDeclarationFlow(node);
+                    break;
+                case 181 /* CallExpression */:
+                    bindCallExpressionFlow(node);
+                    break;
+                case 283 /* JSDocComment */:
+                    bindJSDocComment(node);
+                    break;
+                case 291 /* JSDocTypedefTag */:
+                    bindJSDocTypedefTag(node);
+                    break;
+                default:
+                    bindEachChild(node);
                     break;
-                }
-            }
-            // Recording the trailing comma is deliberately done after the previous
-            // loop, and not just if we see a list terminator. This is because the list
-            // may have ended incorrectly, but it is still important to know if there
-            // was a trailing comma.
-            // Check if the last token was a comma.
-            if (commaStart >= 0) {
-                // Always preserve a trailing comma by marking it on the NodeArray
-                result.hasTrailingComma = true;
             }
-            result.end = getNodeEnd();
-            parsingContext = saveParsingContext;
-            return result;
         }
-        function createMissingList() {
-            return createNodeArray();
-        }
-        function parseBracketedList(kind, parseElement, open, close) {
-            if (parseExpected(open)) {
-                var result = parseDelimitedList(kind, parseElement);
-                parseExpected(close);
-                return result;
+        function isNarrowingExpression(expr) {
+            switch (expr.kind) {
+                case 71 /* Identifier */:
+                case 99 /* ThisKeyword */:
+                case 179 /* PropertyAccessExpression */:
+                    return isNarrowableReference(expr);
+                case 181 /* CallExpression */:
+                    return hasNarrowableArgument(expr);
+                case 185 /* ParenthesizedExpression */:
+                    return isNarrowingExpression(expr.expression);
+                case 194 /* BinaryExpression */:
+                    return isNarrowingBinaryExpression(expr);
+                case 192 /* PrefixUnaryExpression */:
+                    return expr.operator === 51 /* ExclamationToken */ && isNarrowingExpression(expr.operand);
             }
-            return createMissingList();
+            return false;
         }
-        // The allowReservedWords parameter controls whether reserved words are permitted after the first dot
-        function parseEntityName(allowReservedWords, diagnosticMessage) {
-            var entity = parseIdentifier(diagnosticMessage);
-            while (parseOptional(21 /* DotToken */)) {
-                var node = createNode(139 /* QualifiedName */, entity.pos); // !!!
-                node.left = entity;
-                node.right = parseRightSideOfDot(allowReservedWords);
-                entity = finishNode(node);
-            }
-            return entity;
+        function isNarrowableReference(expr) {
+            return expr.kind === 71 /* Identifier */ ||
+                expr.kind === 99 /* ThisKeyword */ ||
+                expr.kind === 97 /* SuperKeyword */ ||
+                expr.kind === 179 /* PropertyAccessExpression */ && isNarrowableReference(expr.expression);
         }
-        function parseRightSideOfDot(allowIdentifierNames) {
-            // Technically a keyword is valid here as all identifiers and keywords are identifier names.
-            // However, often we'll encounter this in error situations when the identifier or keyword
-            // is actually starting another valid construct.
-            //
-            // So, we check for the following specific case:
-            //
-            //      name.
-            //      identifierOrKeyword identifierNameOrKeyword
-            //
-            // Note: the newlines are important here.  For example, if that above code
-            // were rewritten into:
-            //
-            //      name.identifierOrKeyword
-            //      identifierNameOrKeyword
-            //
-            // Then we would consider it valid.  That's because ASI would take effect and
-            // the code would be implicitly: "name.identifierOrKeyword; identifierNameOrKeyword".
-            // In the first case though, ASI will not take effect because there is not a
-            // line terminator after the identifier or keyword.
-            if (scanner.hasPrecedingLineBreak() && ts.tokenIsIdentifierOrKeyword(token())) {
-                var matchesPattern = lookAhead(nextTokenIsIdentifierOrKeywordOnSameLine);
-                if (matchesPattern) {
-                    // Report that we need an identifier.  However, report it right after the dot,
-                    // and not on the next token.  This is because the next token might actually
-                    // be an identifier and the error would be quite confusing.
-                    return createMissingNode(69 /* Identifier */, /*reportAtCurrentPosition*/ true, ts.Diagnostics.Identifier_expected);
+        function hasNarrowableArgument(expr) {
+            if (expr.arguments) {
+                for (var _i = 0, _a = expr.arguments; _i < _a.length; _i++) {
+                    var argument = _a[_i];
+                    if (isNarrowableReference(argument)) {
+                        return true;
+                    }
                 }
             }
-            return allowIdentifierNames ? parseIdentifierName() : parseIdentifier();
-        }
-        function parseTemplateExpression() {
-            var template = createNode(189 /* TemplateExpression */);
-            template.head = parseTemplateLiteralFragment();
-            ts.Debug.assert(template.head.kind === 12 /* TemplateHead */, "Template head has wrong token kind");
-            var templateSpans = createNodeArray();
-            do {
-                templateSpans.push(parseTemplateSpan());
-            } while (ts.lastOrUndefined(templateSpans).literal.kind === 13 /* TemplateMiddle */);
-            templateSpans.end = getNodeEnd();
-            template.templateSpans = templateSpans;
-            return finishNode(template);
+            if (expr.expression.kind === 179 /* PropertyAccessExpression */ &&
+                isNarrowableReference(expr.expression.expression)) {
+                return true;
+            }
+            return false;
         }
-        function parseTemplateSpan() {
-            var span = createNode(197 /* TemplateSpan */);
-            span.expression = allowInAnd(parseExpression);
-            var literal;
-            if (token() === 16 /* CloseBraceToken */) {
-                reScanTemplateToken();
-                literal = parseTemplateLiteralFragment();
+        function isNarrowingTypeofOperands(expr1, expr2) {
+            return expr1.kind === 189 /* TypeOfExpression */ && isNarrowableOperand(expr1.expression) && expr2.kind === 9 /* StringLiteral */;
+        }
+        function isNarrowingBinaryExpression(expr) {
+            switch (expr.operatorToken.kind) {
+                case 58 /* EqualsToken */:
+                    return isNarrowableReference(expr.left);
+                case 32 /* EqualsEqualsToken */:
+                case 33 /* ExclamationEqualsToken */:
+                case 34 /* EqualsEqualsEqualsToken */:
+                case 35 /* ExclamationEqualsEqualsToken */:
+                    return isNarrowableOperand(expr.left) || isNarrowableOperand(expr.right) ||
+                        isNarrowingTypeofOperands(expr.right, expr.left) || isNarrowingTypeofOperands(expr.left, expr.right);
+                case 93 /* InstanceOfKeyword */:
+                    return isNarrowableOperand(expr.left);
+                case 26 /* CommaToken */:
+                    return isNarrowingExpression(expr.right);
             }
-            else {
-                literal = parseExpectedToken(14 /* TemplateTail */, /*reportAtCurrentPosition*/ false, ts.Diagnostics._0_expected, ts.tokenToString(16 /* CloseBraceToken */));
+            return false;
+        }
+        function isNarrowableOperand(expr) {
+            switch (expr.kind) {
+                case 185 /* ParenthesizedExpression */:
+                    return isNarrowableOperand(expr.expression);
+                case 194 /* BinaryExpression */:
+                    switch (expr.operatorToken.kind) {
+                        case 58 /* EqualsToken */:
+                            return isNarrowableOperand(expr.left);
+                        case 26 /* CommaToken */:
+                            return isNarrowableOperand(expr.right);
+                    }
             }
-            span.literal = literal;
-            return finishNode(span);
+            return isNarrowableReference(expr);
         }
-        function parseLiteralNode(internName) {
-            return parseLiteralLikeNode(token(), internName);
+        function createBranchLabel() {
+            return {
+                flags: 4 /* BranchLabel */,
+                antecedents: undefined
+            };
         }
-        function parseTemplateLiteralFragment() {
-            return parseLiteralLikeNode(token(), /*internName*/ false);
+        function createLoopLabel() {
+            return {
+                flags: 8 /* LoopLabel */,
+                antecedents: undefined
+            };
         }
-        function parseLiteralLikeNode(kind, internName) {
-            var node = createNode(kind);
-            var text = scanner.getTokenValue();
-            node.text = internName ? internIdentifier(text) : text;
-            if (scanner.hasExtendedUnicodeEscape()) {
-                node.hasExtendedUnicodeEscape = true;
+        function setFlowNodeReferenced(flow) {
+            // On first reference we set the Referenced flag, thereafter we set the Shared flag
+            flow.flags |= flow.flags & 512 /* Referenced */ ? 1024 /* Shared */ : 512 /* Referenced */;
+        }
+        function addAntecedent(label, antecedent) {
+            if (!(antecedent.flags & 1 /* Unreachable */) && !ts.contains(label.antecedents, antecedent)) {
+                (label.antecedents || (label.antecedents = [])).push(antecedent);
+                setFlowNodeReferenced(antecedent);
             }
-            if (scanner.isUnterminated()) {
-                node.isUnterminated = true;
+        }
+        function createFlowCondition(flags, antecedent, expression) {
+            if (antecedent.flags & 1 /* Unreachable */) {
+                return antecedent;
             }
-            var tokenPos = scanner.getTokenPos();
-            nextToken();
-            finishNode(node);
-            // Octal literals are not allowed in strict mode or ES5
-            // Note that theoretically the following condition would hold true literals like 009,
-            // which is not octal.But because of how the scanner separates the tokens, we would
-            // never get a token like this. Instead, we would get 00 and 9 as two separate tokens.
-            // We also do not need to check for negatives because any prefix operator would be part of a
-            // parent unary expression.
-            if (node.kind === 8 /* NumericLiteral */
-                && sourceText.charCodeAt(tokenPos) === 48 /* _0 */
-                && ts.isOctalDigit(sourceText.charCodeAt(tokenPos + 1))) {
-                node.isOctalLiteral = true;
+            if (!expression) {
+                return flags & 32 /* TrueCondition */ ? antecedent : unreachableFlow;
             }
-            return node;
+            if (expression.kind === 101 /* TrueKeyword */ && flags & 64 /* FalseCondition */ ||
+                expression.kind === 86 /* FalseKeyword */ && flags & 32 /* TrueCondition */) {
+                return unreachableFlow;
+            }
+            if (!isNarrowingExpression(expression)) {
+                return antecedent;
+            }
+            setFlowNodeReferenced(antecedent);
+            return {
+                flags: flags,
+                expression: expression,
+                antecedent: antecedent
+            };
         }
-        // TYPES
-        function parseTypeReference() {
-            var typeName = parseEntityName(/*allowReservedWords*/ false, ts.Diagnostics.Type_expected);
-            var node = createNode(155 /* TypeReference */, typeName.pos);
-            node.typeName = typeName;
-            if (!scanner.hasPrecedingLineBreak() && token() === 25 /* LessThanToken */) {
-                node.typeArguments = parseBracketedList(18 /* TypeArguments */, parseType, 25 /* LessThanToken */, 27 /* GreaterThanToken */);
+        function createFlowSwitchClause(antecedent, switchStatement, clauseStart, clauseEnd) {
+            if (!isNarrowingExpression(switchStatement.expression)) {
+                return antecedent;
             }
-            return finishNode(node);
+            setFlowNodeReferenced(antecedent);
+            return {
+                flags: 128 /* SwitchClause */,
+                switchStatement: switchStatement,
+                clauseStart: clauseStart,
+                clauseEnd: clauseEnd,
+                antecedent: antecedent
+            };
         }
-        function parseThisTypePredicate(lhs) {
-            nextToken();
-            var node = createNode(154 /* TypePredicate */, lhs.pos);
-            node.parameterName = lhs;
-            node.type = parseType();
-            return finishNode(node);
+        function createFlowAssignment(antecedent, node) {
+            setFlowNodeReferenced(antecedent);
+            return {
+                flags: 16 /* Assignment */,
+                antecedent: antecedent,
+                node: node
+            };
         }
-        function parseThisTypeNode() {
-            var node = createNode(165 /* ThisType */);
-            nextToken();
-            return finishNode(node);
+        function createFlowArrayMutation(antecedent, node) {
+            setFlowNodeReferenced(antecedent);
+            return {
+                flags: 256 /* ArrayMutation */,
+                antecedent: antecedent,
+                node: node
+            };
         }
-        function parseTypeQuery() {
-            var node = createNode(158 /* TypeQuery */);
-            parseExpected(101 /* TypeOfKeyword */);
-            node.exprName = parseEntityName(/*allowReservedWords*/ true);
-            return finishNode(node);
+        function finishFlowLabel(flow) {
+            var antecedents = flow.antecedents;
+            if (!antecedents) {
+                return unreachableFlow;
+            }
+            if (antecedents.length === 1) {
+                return antecedents[0];
+            }
+            return flow;
         }
-        function parseTypeParameter() {
-            var node = createNode(141 /* TypeParameter */);
-            node.name = parseIdentifier();
-            if (parseOptional(83 /* ExtendsKeyword */)) {
-                // It's not uncommon for people to write improper constraints to a generic.  If the
-                // user writes a constraint that is an expression and not an actual type, then parse
-                // it out as an expression (so we can recover well), but report that a type is needed
-                // instead.
-                if (isStartOfType() || !isStartOfExpression()) {
-                    node.constraint = parseType();
+        function isStatementCondition(node) {
+            var parent = node.parent;
+            switch (parent.kind) {
+                case 211 /* IfStatement */:
+                case 213 /* WhileStatement */:
+                case 212 /* DoStatement */:
+                    return parent.expression === node;
+                case 214 /* ForStatement */:
+                case 195 /* ConditionalExpression */:
+                    return parent.condition === node;
+            }
+            return false;
+        }
+        function isLogicalExpression(node) {
+            while (true) {
+                if (node.kind === 185 /* ParenthesizedExpression */) {
+                    node = node.expression;
+                }
+                else if (node.kind === 192 /* PrefixUnaryExpression */ && node.operator === 51 /* ExclamationToken */) {
+                    node = node.operand;
                 }
                 else {
-                    // It was not a type, and it looked like an expression.  Parse out an expression
-                    // here so we recover well.  Note: it is important that we call parseUnaryExpression
-                    // and not parseExpression here.  If the user has:
-                    //
-                    //      <T extends "">
-                    //
-                    // We do *not* want to consume the  >  as we're consuming the expression for "".
-                    node.expression = parseUnaryExpressionOrHigher();
+                    return node.kind === 194 /* BinaryExpression */ && (node.operatorToken.kind === 53 /* AmpersandAmpersandToken */ ||
+                        node.operatorToken.kind === 54 /* BarBarToken */);
                 }
             }
-            return finishNode(node);
         }
-        function parseTypeParameters() {
-            if (token() === 25 /* LessThanToken */) {
-                return parseBracketedList(17 /* TypeParameters */, parseTypeParameter, 25 /* LessThanToken */, 27 /* GreaterThanToken */);
+        function isTopLevelLogicalExpression(node) {
+            while (node.parent.kind === 185 /* ParenthesizedExpression */ ||
+                node.parent.kind === 192 /* PrefixUnaryExpression */ &&
+                    node.parent.operator === 51 /* ExclamationToken */) {
+                node = node.parent;
             }
+            return !isStatementCondition(node) && !isLogicalExpression(node.parent);
         }
-        function parseParameterType() {
-            if (parseOptional(54 /* ColonToken */)) {
-                return parseType();
+        function bindCondition(node, trueTarget, falseTarget) {
+            var saveTrueTarget = currentTrueTarget;
+            var saveFalseTarget = currentFalseTarget;
+            currentTrueTarget = trueTarget;
+            currentFalseTarget = falseTarget;
+            bind(node);
+            currentTrueTarget = saveTrueTarget;
+            currentFalseTarget = saveFalseTarget;
+            if (!node || !isLogicalExpression(node)) {
+                addAntecedent(trueTarget, createFlowCondition(32 /* TrueCondition */, currentFlow, node));
+                addAntecedent(falseTarget, createFlowCondition(64 /* FalseCondition */, currentFlow, node));
             }
-            return undefined;
         }
-        function isStartOfParameter() {
-            return token() === 22 /* DotDotDotToken */ || isIdentifierOrPattern() || ts.isModifierKind(token()) || token() === 55 /* AtToken */ || token() === 97 /* ThisKeyword */;
+        function bindIterativeStatement(node, breakTarget, continueTarget) {
+            var saveBreakTarget = currentBreakTarget;
+            var saveContinueTarget = currentContinueTarget;
+            currentBreakTarget = breakTarget;
+            currentContinueTarget = continueTarget;
+            bind(node);
+            currentBreakTarget = saveBreakTarget;
+            currentContinueTarget = saveContinueTarget;
         }
-        function parseParameter() {
-            var node = createNode(142 /* Parameter */);
-            if (token() === 97 /* ThisKeyword */) {
-                node.name = createIdentifier(/*isIdentifier*/ true, undefined);
-                node.type = parseParameterType();
-                return finishNode(node);
-            }
-            node.decorators = parseDecorators();
-            node.modifiers = parseModifiers();
-            node.dotDotDotToken = parseOptionalToken(22 /* DotDotDotToken */);
-            // FormalParameter [Yield,Await]:
-            //      BindingElement[?Yield,?Await]
-            node.name = parseIdentifierOrPattern();
-            if (ts.getFullWidth(node.name) === 0 && !ts.hasModifiers(node) && ts.isModifierKind(token())) {
-                // in cases like
-                // 'use strict'
-                // function foo(static)
-                // isParameter('static') === true, because of isModifier('static')
-                // however 'static' is not a legal identifier in a strict mode.
-                // so result of this function will be ParameterDeclaration (flags = 0, name = missing, type = undefined, initializer = undefined)
-                // and current token will not change => parsing of the enclosing parameter list will last till the end of time (or OOM)
-                // to avoid this we'll advance cursor to the next token.
-                nextToken();
-            }
-            node.questionToken = parseOptionalToken(53 /* QuestionToken */);
-            node.type = parseParameterType();
-            node.initializer = parseBindingElementInitializer(/*inParameter*/ true);
-            // Do not check for initializers in an ambient context for parameters. This is not
-            // a grammar error because the grammar allows arbitrary call signatures in
-            // an ambient context.
-            // It is actually not necessary for this to be an error at all. The reason is that
-            // function/constructor implementations are syntactically disallowed in ambient
-            // contexts. In addition, parameter initializers are semantically disallowed in
-            // overload signatures. So parameter initializers are transitively disallowed in
-            // ambient contexts.
-            return addJSDocComment(finishNode(node));
+        function bindWhileStatement(node) {
+            var preWhileLabel = createLoopLabel();
+            var preBodyLabel = createBranchLabel();
+            var postWhileLabel = createBranchLabel();
+            addAntecedent(preWhileLabel, currentFlow);
+            currentFlow = preWhileLabel;
+            bindCondition(node.expression, preBodyLabel, postWhileLabel);
+            currentFlow = finishFlowLabel(preBodyLabel);
+            bindIterativeStatement(node.statement, postWhileLabel, preWhileLabel);
+            addAntecedent(preWhileLabel, currentFlow);
+            currentFlow = finishFlowLabel(postWhileLabel);
         }
-        function parseBindingElementInitializer(inParameter) {
-            return inParameter ? parseParameterInitializer() : parseNonParameterInitializer();
+        function bindDoStatement(node) {
+            var preDoLabel = createLoopLabel();
+            var enclosingLabeledStatement = node.parent.kind === 222 /* LabeledStatement */
+                ? ts.lastOrUndefined(activeLabels)
+                : undefined;
+            // if do statement is wrapped in labeled statement then target labels for break/continue with or without
+            // label should be the same
+            var preConditionLabel = enclosingLabeledStatement ? enclosingLabeledStatement.continueTarget : createBranchLabel();
+            var postDoLabel = enclosingLabeledStatement ? enclosingLabeledStatement.breakTarget : createBranchLabel();
+            addAntecedent(preDoLabel, currentFlow);
+            currentFlow = preDoLabel;
+            bindIterativeStatement(node.statement, postDoLabel, preConditionLabel);
+            addAntecedent(preConditionLabel, currentFlow);
+            currentFlow = finishFlowLabel(preConditionLabel);
+            bindCondition(node.expression, preDoLabel, postDoLabel);
+            currentFlow = finishFlowLabel(postDoLabel);
         }
-        function parseParameterInitializer() {
-            return parseInitializer(/*inParameter*/ true);
+        function bindForStatement(node) {
+            var preLoopLabel = createLoopLabel();
+            var preBodyLabel = createBranchLabel();
+            var postLoopLabel = createBranchLabel();
+            bind(node.initializer);
+            addAntecedent(preLoopLabel, currentFlow);
+            currentFlow = preLoopLabel;
+            bindCondition(node.condition, preBodyLabel, postLoopLabel);
+            currentFlow = finishFlowLabel(preBodyLabel);
+            bindIterativeStatement(node.statement, postLoopLabel, preLoopLabel);
+            bind(node.incrementor);
+            addAntecedent(preLoopLabel, currentFlow);
+            currentFlow = finishFlowLabel(postLoopLabel);
         }
-        function fillSignature(returnToken, yieldContext, awaitContext, requireCompleteParameterList, signature) {
-            var returnTokenRequired = returnToken === 34 /* EqualsGreaterThanToken */;
-            signature.typeParameters = parseTypeParameters();
-            signature.parameters = parseParameterList(yieldContext, awaitContext, requireCompleteParameterList);
-            if (returnTokenRequired) {
-                parseExpected(returnToken);
-                signature.type = parseTypeOrTypePredicate();
+        function bindForInOrForOfStatement(node) {
+            var preLoopLabel = createLoopLabel();
+            var postLoopLabel = createBranchLabel();
+            addAntecedent(preLoopLabel, currentFlow);
+            currentFlow = preLoopLabel;
+            if (node.kind === 216 /* ForOfStatement */) {
+                bind(node.awaitModifier);
             }
-            else if (parseOptional(returnToken)) {
-                signature.type = parseTypeOrTypePredicate();
+            bind(node.expression);
+            addAntecedent(postLoopLabel, currentFlow);
+            bind(node.initializer);
+            if (node.initializer.kind !== 227 /* VariableDeclarationList */) {
+                bindAssignmentTargetFlow(node.initializer);
             }
+            bindIterativeStatement(node.statement, postLoopLabel, preLoopLabel);
+            addAntecedent(preLoopLabel, currentFlow);
+            currentFlow = finishFlowLabel(postLoopLabel);
         }
-        function parseParameterList(yieldContext, awaitContext, requireCompleteParameterList) {
-            // FormalParameters [Yield,Await]: (modified)
-            //      [empty]
-            //      FormalParameterList[?Yield,Await]
-            //
-            // FormalParameter[Yield,Await]: (modified)
-            //      BindingElement[?Yield,Await]
-            //
-            // BindingElement [Yield,Await]: (modified)
-            //      SingleNameBinding[?Yield,?Await]
-            //      BindingPattern[?Yield,?Await]Initializer [In, ?Yield,?Await] opt
-            //
-            // SingleNameBinding [Yield,Await]:
-            //      BindingIdentifier[?Yield,?Await]Initializer [In, ?Yield,?Await] opt
-            if (parseExpected(17 /* OpenParenToken */)) {
-                var savedYieldContext = inYieldContext();
-                var savedAwaitContext = inAwaitContext();
-                setYieldContext(yieldContext);
-                setAwaitContext(awaitContext);
-                var result = parseDelimitedList(16 /* Parameters */, parseParameter);
-                setYieldContext(savedYieldContext);
-                setAwaitContext(savedAwaitContext);
-                if (!parseExpected(18 /* CloseParenToken */) && requireCompleteParameterList) {
-                    // Caller insisted that we had to end with a )   We didn't.  So just return
-                    // undefined here.
-                    return undefined;
+        function bindIfStatement(node) {
+            var thenLabel = createBranchLabel();
+            var elseLabel = createBranchLabel();
+            var postIfLabel = createBranchLabel();
+            bindCondition(node.expression, thenLabel, elseLabel);
+            currentFlow = finishFlowLabel(thenLabel);
+            bind(node.thenStatement);
+            addAntecedent(postIfLabel, currentFlow);
+            currentFlow = finishFlowLabel(elseLabel);
+            bind(node.elseStatement);
+            addAntecedent(postIfLabel, currentFlow);
+            currentFlow = finishFlowLabel(postIfLabel);
+        }
+        function bindReturnOrThrow(node) {
+            bind(node.expression);
+            if (node.kind === 219 /* ReturnStatement */) {
+                hasExplicitReturn = true;
+                if (currentReturnTarget) {
+                    addAntecedent(currentReturnTarget, currentFlow);
                 }
-                return result;
             }
-            // We didn't even have an open paren.  If the caller requires a complete parameter list,
-            // we definitely can't provide that.  However, if they're ok with an incomplete one,
-            // then just return an empty set of parameters.
-            return requireCompleteParameterList ? undefined : createMissingList();
+            currentFlow = unreachableFlow;
         }
-        function parseTypeMemberSemicolon() {
-            // We allow type members to be separated by commas or (possibly ASI) semicolons.
-            // First check if it was a comma.  If so, we're done with the member.
-            if (parseOptional(24 /* CommaToken */)) {
-                return;
+        function findActiveLabel(name) {
+            if (activeLabels) {
+                for (var _i = 0, activeLabels_1 = activeLabels; _i < activeLabels_1.length; _i++) {
+                    var label = activeLabels_1[_i];
+                    if (label.name === name) {
+                        return label;
+                    }
+                }
             }
-            // Didn't have a comma.  We must have a (possible ASI) semicolon.
-            parseSemicolon();
+            return undefined;
         }
-        function parseSignatureMember(kind) {
-            var node = createNode(kind);
-            if (kind === 152 /* ConstructSignature */) {
-                parseExpected(92 /* NewKeyword */);
+        function bindBreakOrContinueFlow(node, breakTarget, continueTarget) {
+            var flowLabel = node.kind === 218 /* BreakStatement */ ? breakTarget : continueTarget;
+            if (flowLabel) {
+                addAntecedent(flowLabel, currentFlow);
+                currentFlow = unreachableFlow;
             }
-            fillSignature(54 /* ColonToken */, /*yieldContext*/ false, /*awaitContext*/ false, /*requireCompleteParameterList*/ false, node);
-            parseTypeMemberSemicolon();
-            return addJSDocComment(finishNode(node));
         }
-        function isIndexSignature() {
-            if (token() !== 19 /* OpenBracketToken */) {
-                return false;
+        function bindBreakOrContinueStatement(node) {
+            bind(node.label);
+            if (node.label) {
+                var activeLabel = findActiveLabel(node.label.text);
+                if (activeLabel) {
+                    activeLabel.referenced = true;
+                    bindBreakOrContinueFlow(node, activeLabel.breakTarget, activeLabel.continueTarget);
+                }
+            }
+            else {
+                bindBreakOrContinueFlow(node, currentBreakTarget, currentContinueTarget);
             }
-            return lookAhead(isUnambiguouslyIndexSignature);
         }
-        function isUnambiguouslyIndexSignature() {
-            // The only allowed sequence is:
-            //
-            //   [id:
-            //
-            // However, for error recovery, we also check the following cases:
-            //
-            //   [...
-            //   [id,
-            //   [id?,
-            //   [id?:
-            //   [id?]
-            //   [public id
-            //   [private id
-            //   [protected id
-            //   []
-            //
-            nextToken();
-            if (token() === 22 /* DotDotDotToken */ || token() === 20 /* CloseBracketToken */) {
-                return true;
+        function bindTryStatement(node) {
+            var preFinallyLabel = createBranchLabel();
+            var preTryFlow = currentFlow;
+            // TODO: Every statement in try block is potentially an exit point!
+            bind(node.tryBlock);
+            addAntecedent(preFinallyLabel, currentFlow);
+            var flowAfterTry = currentFlow;
+            var flowAfterCatch = unreachableFlow;
+            if (node.catchClause) {
+                currentFlow = preTryFlow;
+                bind(node.catchClause);
+                addAntecedent(preFinallyLabel, currentFlow);
+                flowAfterCatch = currentFlow;
             }
-            if (ts.isModifierKind(token())) {
-                nextToken();
-                if (isIdentifier()) {
-                    return true;
+            if (node.finallyBlock) {
+                // in finally flow is combined from pre-try/flow from try/flow from catch
+                // pre-flow is necessary to make sure that finally is reachable even if finally flows in both try and finally blocks are unreachable
+                // also for finally blocks we inject two extra edges into the flow graph.
+                // first -> edge that connects pre-try flow with the label at the beginning of the finally block, it has lock associated with it
+                // second -> edge that represents post-finally flow.
+                // these edges are used in following scenario:
+                // let a; (1)
+                // try { a = someOperation(); (2)}
+                // finally { (3) console.log(a) } (4)
+                // (5) a
+                // flow graph for this case looks roughly like this (arrows show ):
+                // (1-pre-try-flow) <--.. <-- (2-post-try-flow)
+                //  ^                                ^
+                //  |*****(3-pre-finally-label) -----|
+                //                ^
+                //                |-- ... <-- (4-post-finally-label) <--- (5)
+                // In case when we walk the flow starting from inside the finally block we want to take edge '*****' into account
+                // since it ensures that finally is always reachable. However when we start outside the finally block and go through label (5)
+                // then edge '*****' should be discarded because label 4 is only reachable if post-finally label-4 is reachable
+                // Simply speaking code inside finally block is treated as reachable as pre-try-flow
+                // since we conservatively assume that any line in try block can throw or return in which case we'll enter finally.
+                // However code after finally is reachable only if control flow was not abrupted in try/catch or finally blocks - it should be composed from
+                // final flows of these blocks without taking pre-try flow into account.
+                //
+                // extra edges that we inject allows to control this behavior
+                // if when walking the flow we step on post-finally edge - we can mark matching pre-finally edge as locked so it will be skipped.
+                var preFinallyFlow = { flags: 2048 /* PreFinally */, antecedent: preTryFlow, lock: {} };
+                addAntecedent(preFinallyLabel, preFinallyFlow);
+                currentFlow = finishFlowLabel(preFinallyLabel);
+                bind(node.finallyBlock);
+                // if flow after finally is unreachable - keep it
+                // otherwise check if flows after try and after catch are unreachable
+                // if yes - convert current flow to unreachable
+                // i.e.
+                // try { return "1" } finally { console.log(1); }
+                // console.log(2); // this line should be unreachable even if flow falls out of finally block
+                if (!(currentFlow.flags & 1 /* Unreachable */)) {
+                    if ((flowAfterTry.flags & 1 /* Unreachable */) && (flowAfterCatch.flags & 1 /* Unreachable */)) {
+                        currentFlow = flowAfterTry === reportedUnreachableFlow || flowAfterCatch === reportedUnreachableFlow
+                            ? reportedUnreachableFlow
+                            : unreachableFlow;
+                    }
+                }
+                if (!(currentFlow.flags & 1 /* Unreachable */)) {
+                    var afterFinallyFlow = { flags: 4096 /* AfterFinally */, antecedent: currentFlow };
+                    preFinallyFlow.lock = afterFinallyFlow;
+                    currentFlow = afterFinallyFlow;
                 }
-            }
-            else if (!isIdentifier()) {
-                return false;
             }
             else {
-                // Skip the identifier
-                nextToken();
-            }
-            // A colon signifies a well formed indexer
-            // A comma should be a badly formed indexer because comma expressions are not allowed
-            // in computed properties.
-            if (token() === 54 /* ColonToken */ || token() === 24 /* CommaToken */) {
-                return true;
-            }
-            // Question mark could be an indexer with an optional property,
-            // or it could be a conditional expression in a computed property.
-            if (token() !== 53 /* QuestionToken */) {
-                return false;
+                currentFlow = finishFlowLabel(preFinallyLabel);
             }
-            // If any of the following tokens are after the question mark, it cannot
-            // be a conditional expression, so treat it as an indexer.
-            nextToken();
-            return token() === 54 /* ColonToken */ || token() === 24 /* CommaToken */ || token() === 20 /* CloseBracketToken */;
         }
-        function parseIndexSignatureDeclaration(fullStart, decorators, modifiers) {
-            var node = createNode(153 /* IndexSignature */, fullStart);
-            node.decorators = decorators;
-            node.modifiers = modifiers;
-            node.parameters = parseBracketedList(16 /* Parameters */, parseParameter, 19 /* OpenBracketToken */, 20 /* CloseBracketToken */);
-            node.type = parseTypeAnnotation();
-            parseTypeMemberSemicolon();
-            return finishNode(node);
-        }
-        function parsePropertyOrMethodSignature(fullStart, modifiers) {
-            var name = parsePropertyName();
-            var questionToken = parseOptionalToken(53 /* QuestionToken */);
-            if (token() === 17 /* OpenParenToken */ || token() === 25 /* LessThanToken */) {
-                var method = createNode(146 /* MethodSignature */, fullStart);
-                method.modifiers = modifiers;
-                method.name = name;
-                method.questionToken = questionToken;
-                // Method signatures don't exist in expression contexts.  So they have neither
-                // [Yield] nor [Await]
-                fillSignature(54 /* ColonToken */, /*yieldContext*/ false, /*awaitContext*/ false, /*requireCompleteParameterList*/ false, method);
-                parseTypeMemberSemicolon();
-                return addJSDocComment(finishNode(method));
+        function bindSwitchStatement(node) {
+            var postSwitchLabel = createBranchLabel();
+            bind(node.expression);
+            var saveBreakTarget = currentBreakTarget;
+            var savePreSwitchCaseFlow = preSwitchCaseFlow;
+            currentBreakTarget = postSwitchLabel;
+            preSwitchCaseFlow = currentFlow;
+            bind(node.caseBlock);
+            addAntecedent(postSwitchLabel, currentFlow);
+            var hasDefault = ts.forEach(node.caseBlock.clauses, function (c) { return c.kind === 258 /* DefaultClause */; });
+            // We mark a switch statement as possibly exhaustive if it has no default clause and if all
+            // case clauses have unreachable end points (e.g. they all return).
+            node.possiblyExhaustive = !hasDefault && !postSwitchLabel.antecedents;
+            if (!hasDefault) {
+                addAntecedent(postSwitchLabel, createFlowSwitchClause(preSwitchCaseFlow, node, 0, 0));
             }
-            else {
-                var property = createNode(144 /* PropertySignature */, fullStart);
-                property.modifiers = modifiers;
-                property.name = name;
-                property.questionToken = questionToken;
-                property.type = parseTypeAnnotation();
-                if (token() === 56 /* EqualsToken */) {
-                    // Although type literal properties cannot not have initializers, we attempt
-                    // to parse an initializer so we can report in the checker that an interface
-                    // property or type literal property cannot have an initializer.
-                    property.initializer = parseNonParameterInitializer();
+            currentBreakTarget = saveBreakTarget;
+            preSwitchCaseFlow = savePreSwitchCaseFlow;
+            currentFlow = finishFlowLabel(postSwitchLabel);
+        }
+        function bindCaseBlock(node) {
+            var savedSubtreeTransformFlags = subtreeTransformFlags;
+            subtreeTransformFlags = 0;
+            var clauses = node.clauses;
+            var fallthroughFlow = unreachableFlow;
+            for (var i = 0; i < clauses.length; i++) {
+                var clauseStart = i;
+                while (!clauses[i].statements.length && i + 1 < clauses.length) {
+                    bind(clauses[i]);
+                    i++;
+                }
+                var preCaseLabel = createBranchLabel();
+                addAntecedent(preCaseLabel, createFlowSwitchClause(preSwitchCaseFlow, node.parent, clauseStart, i + 1));
+                addAntecedent(preCaseLabel, fallthroughFlow);
+                currentFlow = finishFlowLabel(preCaseLabel);
+                var clause = clauses[i];
+                bind(clause);
+                fallthroughFlow = currentFlow;
+                if (!(currentFlow.flags & 1 /* Unreachable */) && i !== clauses.length - 1 && options.noFallthroughCasesInSwitch) {
+                    errorOnFirstToken(clause, ts.Diagnostics.Fallthrough_case_in_switch);
                 }
-                parseTypeMemberSemicolon();
-                return addJSDocComment(finishNode(property));
             }
+            clauses.transformFlags = subtreeTransformFlags | 536870912 /* HasComputedFlags */;
+            subtreeTransformFlags |= savedSubtreeTransformFlags;
         }
-        function isTypeMemberStart() {
-            var idToken;
-            // Return true if we have the start of a signature member
-            if (token() === 17 /* OpenParenToken */ || token() === 25 /* LessThanToken */) {
-                return true;
-            }
-            // Eat up all modifiers, but hold on to the last one in case it is actually an identifier
-            while (ts.isModifierKind(token())) {
-                idToken = token();
-                nextToken();
-            }
-            // Index signatures and computed property names are type members
-            if (token() === 19 /* OpenBracketToken */) {
-                return true;
-            }
-            // Try to get the first property-like token following all modifiers
-            if (isLiteralPropertyName()) {
-                idToken = token();
-                nextToken();
-            }
-            // If we were able to get any potential identifier, check that it is
-            // the start of a member declaration
-            if (idToken) {
-                return token() === 17 /* OpenParenToken */ ||
-                    token() === 25 /* LessThanToken */ ||
-                    token() === 53 /* QuestionToken */ ||
-                    token() === 54 /* ColonToken */ ||
-                    token() === 24 /* CommaToken */ ||
-                    canParseSemicolon();
-            }
-            return false;
+        function bindCaseClause(node) {
+            var saveCurrentFlow = currentFlow;
+            currentFlow = preSwitchCaseFlow;
+            bind(node.expression);
+            currentFlow = saveCurrentFlow;
+            bindEach(node.statements);
+        }
+        function pushActiveLabel(name, breakTarget, continueTarget) {
+            var activeLabel = {
+                name: name,
+                breakTarget: breakTarget,
+                continueTarget: continueTarget,
+                referenced: false
+            };
+            (activeLabels || (activeLabels = [])).push(activeLabel);
+            return activeLabel;
+        }
+        function popActiveLabel() {
+            activeLabels.pop();
         }
-        function parseTypeMember() {
-            if (token() === 17 /* OpenParenToken */ || token() === 25 /* LessThanToken */) {
-                return parseSignatureMember(151 /* CallSignature */);
-            }
-            if (token() === 92 /* NewKeyword */ && lookAhead(isStartOfConstructSignature)) {
-                return parseSignatureMember(152 /* ConstructSignature */);
+        function bindLabeledStatement(node) {
+            var preStatementLabel = createLoopLabel();
+            var postStatementLabel = createBranchLabel();
+            bind(node.label);
+            addAntecedent(preStatementLabel, currentFlow);
+            var activeLabel = pushActiveLabel(node.label.text, postStatementLabel, preStatementLabel);
+            bind(node.statement);
+            popActiveLabel();
+            if (!activeLabel.referenced && !options.allowUnusedLabels) {
+                file.bindDiagnostics.push(ts.createDiagnosticForNode(node.label, ts.Diagnostics.Unused_label));
             }
-            var fullStart = getNodePos();
-            var modifiers = parseModifiers();
-            if (isIndexSignature()) {
-                return parseIndexSignatureDeclaration(fullStart, /*decorators*/ undefined, modifiers);
+            if (!node.statement || node.statement.kind !== 212 /* DoStatement */) {
+                // do statement sets current flow inside bindDoStatement
+                addAntecedent(postStatementLabel, currentFlow);
+                currentFlow = finishFlowLabel(postStatementLabel);
             }
-            return parsePropertyOrMethodSignature(fullStart, modifiers);
-        }
-        function isStartOfConstructSignature() {
-            nextToken();
-            return token() === 17 /* OpenParenToken */ || token() === 25 /* LessThanToken */;
-        }
-        function parseTypeLiteral() {
-            var node = createNode(159 /* TypeLiteral */);
-            node.members = parseObjectTypeMembers();
-            return finishNode(node);
         }
-        function parseObjectTypeMembers() {
-            var members;
-            if (parseExpected(15 /* OpenBraceToken */)) {
-                members = parseList(4 /* TypeMembers */, parseTypeMember);
-                parseExpected(16 /* CloseBraceToken */);
+        function bindDestructuringTargetFlow(node) {
+            if (node.kind === 194 /* BinaryExpression */ && node.operatorToken.kind === 58 /* EqualsToken */) {
+                bindAssignmentTargetFlow(node.left);
             }
             else {
-                members = createMissingList();
+                bindAssignmentTargetFlow(node);
             }
-            return members;
         }
-        function parseTupleType() {
-            var node = createNode(161 /* TupleType */);
-            node.elementTypes = parseBracketedList(19 /* TupleElementTypes */, parseType, 19 /* OpenBracketToken */, 20 /* CloseBracketToken */);
-            return finishNode(node);
-        }
-        function parseParenthesizedType() {
-            var node = createNode(164 /* ParenthesizedType */);
-            parseExpected(17 /* OpenParenToken */);
-            node.type = parseType();
-            parseExpected(18 /* CloseParenToken */);
-            return finishNode(node);
-        }
-        function parseFunctionOrConstructorType(kind) {
-            var node = createNode(kind);
-            if (kind === 157 /* ConstructorType */) {
-                parseExpected(92 /* NewKeyword */);
+        function bindAssignmentTargetFlow(node) {
+            if (isNarrowableReference(node)) {
+                currentFlow = createFlowAssignment(currentFlow, node);
             }
-            fillSignature(34 /* EqualsGreaterThanToken */, /*yieldContext*/ false, /*awaitContext*/ false, /*requireCompleteParameterList*/ false, node);
-            return finishNode(node);
-        }
-        function parseKeywordAndNoDot() {
-            var node = parseTokenNode();
-            return token() === 21 /* DotToken */ ? undefined : node;
-        }
-        function parseLiteralTypeNode() {
-            var node = createNode(166 /* LiteralType */);
-            node.literal = parseSimpleUnaryExpression();
-            finishNode(node);
-            return node;
-        }
-        function nextTokenIsNumericLiteral() {
-            return nextToken() === 8 /* NumericLiteral */;
-        }
-        function parseNonArrayType() {
-            switch (token()) {
-                case 117 /* AnyKeyword */:
-                case 132 /* StringKeyword */:
-                case 130 /* NumberKeyword */:
-                case 120 /* BooleanKeyword */:
-                case 133 /* SymbolKeyword */:
-                case 135 /* UndefinedKeyword */:
-                case 127 /* NeverKeyword */:
-                    // If these are followed by a dot, then parse these out as a dotted type reference instead.
-                    var node = tryParse(parseKeywordAndNoDot);
-                    return node || parseTypeReference();
-                case 9 /* StringLiteral */:
-                case 8 /* NumericLiteral */:
-                case 99 /* TrueKeyword */:
-                case 84 /* FalseKeyword */:
-                    return parseLiteralTypeNode();
-                case 36 /* MinusToken */:
-                    return lookAhead(nextTokenIsNumericLiteral) ? parseLiteralTypeNode() : parseTypeReference();
-                case 103 /* VoidKeyword */:
-                case 93 /* NullKeyword */:
-                    return parseTokenNode();
-                case 97 /* ThisKeyword */: {
-                    var thisKeyword = parseThisTypeNode();
-                    if (token() === 124 /* IsKeyword */ && !scanner.hasPrecedingLineBreak()) {
-                        return parseThisTypePredicate(thisKeyword);
+            else if (node.kind === 177 /* ArrayLiteralExpression */) {
+                for (var _i = 0, _a = node.elements; _i < _a.length; _i++) {
+                    var e = _a[_i];
+                    if (e.kind === 198 /* SpreadElement */) {
+                        bindAssignmentTargetFlow(e.expression);
                     }
                     else {
-                        return thisKeyword;
+                        bindDestructuringTargetFlow(e);
                     }
                 }
-                case 101 /* TypeOfKeyword */:
-                    return parseTypeQuery();
-                case 15 /* OpenBraceToken */:
-                    return parseTypeLiteral();
-                case 19 /* OpenBracketToken */:
-                    return parseTupleType();
-                case 17 /* OpenParenToken */:
-                    return parseParenthesizedType();
-                default:
-                    return parseTypeReference();
             }
-        }
-        function isStartOfType() {
-            switch (token()) {
-                case 117 /* AnyKeyword */:
-                case 132 /* StringKeyword */:
-                case 130 /* NumberKeyword */:
-                case 120 /* BooleanKeyword */:
-                case 133 /* SymbolKeyword */:
-                case 103 /* VoidKeyword */:
-                case 135 /* UndefinedKeyword */:
-                case 93 /* NullKeyword */:
-                case 97 /* ThisKeyword */:
-                case 101 /* TypeOfKeyword */:
-                case 127 /* NeverKeyword */:
-                case 15 /* OpenBraceToken */:
-                case 19 /* OpenBracketToken */:
-                case 25 /* LessThanToken */:
-                case 92 /* NewKeyword */:
-                case 9 /* StringLiteral */:
-                case 8 /* NumericLiteral */:
-                case 99 /* TrueKeyword */:
-                case 84 /* FalseKeyword */:
-                    return true;
-                case 36 /* MinusToken */:
-                    return lookAhead(nextTokenIsNumericLiteral);
-                case 17 /* OpenParenToken */:
-                    // Only consider '(' the start of a type if followed by ')', '...', an identifier, a modifier,
-                    // or something that starts a type. We don't want to consider things like '(1)' a type.
-                    return lookAhead(isStartOfParenthesizedOrFunctionType);
-                default:
-                    return isIdentifier();
+            else if (node.kind === 178 /* ObjectLiteralExpression */) {
+                for (var _b = 0, _c = node.properties; _b < _c.length; _b++) {
+                    var p = _c[_b];
+                    if (p.kind === 261 /* PropertyAssignment */) {
+                        bindDestructuringTargetFlow(p.initializer);
+                    }
+                    else if (p.kind === 262 /* ShorthandPropertyAssignment */) {
+                        bindAssignmentTargetFlow(p.name);
+                    }
+                    else if (p.kind === 263 /* SpreadAssignment */) {
+                        bindAssignmentTargetFlow(p.expression);
+                    }
+                }
             }
         }
-        function isStartOfParenthesizedOrFunctionType() {
-            nextToken();
-            return token() === 18 /* CloseParenToken */ || isStartOfParameter() || isStartOfType();
-        }
-        function parseArrayTypeOrHigher() {
-            var type = parseNonArrayType();
-            while (!scanner.hasPrecedingLineBreak() && parseOptional(19 /* OpenBracketToken */)) {
-                parseExpected(20 /* CloseBracketToken */);
-                var node = createNode(160 /* ArrayType */, type.pos);
-                node.elementType = type;
-                type = finishNode(node);
+        function bindLogicalExpression(node, trueTarget, falseTarget) {
+            var preRightLabel = createBranchLabel();
+            if (node.operatorToken.kind === 53 /* AmpersandAmpersandToken */) {
+                bindCondition(node.left, preRightLabel, falseTarget);
             }
-            return type;
+            else {
+                bindCondition(node.left, trueTarget, preRightLabel);
+            }
+            currentFlow = finishFlowLabel(preRightLabel);
+            bind(node.operatorToken);
+            bindCondition(node.right, trueTarget, falseTarget);
         }
-        function parseUnionOrIntersectionType(kind, parseConstituentType, operator) {
-            var type = parseConstituentType();
-            if (token() === operator) {
-                var types = createNodeArray([type], type.pos);
-                while (parseOptional(operator)) {
-                    types.push(parseConstituentType());
+        function bindPrefixUnaryExpressionFlow(node) {
+            if (node.operator === 51 /* ExclamationToken */) {
+                var saveTrueTarget = currentTrueTarget;
+                currentTrueTarget = currentFalseTarget;
+                currentFalseTarget = saveTrueTarget;
+                bindEachChild(node);
+                currentFalseTarget = currentTrueTarget;
+                currentTrueTarget = saveTrueTarget;
+            }
+            else {
+                bindEachChild(node);
+                if (node.operator === 43 /* PlusPlusToken */ || node.operator === 44 /* MinusMinusToken */) {
+                    bindAssignmentTargetFlow(node.operand);
                 }
-                types.end = getNodeEnd();
-                var node = createNode(kind, type.pos);
-                node.types = types;
-                type = finishNode(node);
             }
-            return type;
-        }
-        function parseIntersectionTypeOrHigher() {
-            return parseUnionOrIntersectionType(163 /* IntersectionType */, parseArrayTypeOrHigher, 46 /* AmpersandToken */);
         }
-        function parseUnionTypeOrHigher() {
-            return parseUnionOrIntersectionType(162 /* UnionType */, parseIntersectionTypeOrHigher, 47 /* BarToken */);
+        function bindPostfixUnaryExpressionFlow(node) {
+            bindEachChild(node);
+            if (node.operator === 43 /* PlusPlusToken */ || node.operator === 44 /* MinusMinusToken */) {
+                bindAssignmentTargetFlow(node.operand);
+            }
         }
-        function isStartOfFunctionType() {
-            if (token() === 25 /* LessThanToken */) {
-                return true;
+        function bindBinaryExpressionFlow(node) {
+            var operator = node.operatorToken.kind;
+            if (operator === 53 /* AmpersandAmpersandToken */ || operator === 54 /* BarBarToken */) {
+                if (isTopLevelLogicalExpression(node)) {
+                    var postExpressionLabel = createBranchLabel();
+                    bindLogicalExpression(node, postExpressionLabel, postExpressionLabel);
+                    currentFlow = finishFlowLabel(postExpressionLabel);
+                }
+                else {
+                    bindLogicalExpression(node, currentTrueTarget, currentFalseTarget);
+                }
+            }
+            else {
+                bindEachChild(node);
+                if (ts.isAssignmentOperator(operator) && !ts.isAssignmentTarget(node)) {
+                    bindAssignmentTargetFlow(node.left);
+                    if (operator === 58 /* EqualsToken */ && node.left.kind === 180 /* ElementAccessExpression */) {
+                        var elementAccess = node.left;
+                        if (isNarrowableOperand(elementAccess.expression)) {
+                            currentFlow = createFlowArrayMutation(currentFlow, node);
+                        }
+                    }
+                }
             }
-            return token() === 17 /* OpenParenToken */ && lookAhead(isUnambiguouslyStartOfFunctionType);
         }
-        function skipParameterStart() {
-            if (ts.isModifierKind(token())) {
-                // Skip modifiers
-                parseModifiers();
+        function bindDeleteExpressionFlow(node) {
+            bindEachChild(node);
+            if (node.expression.kind === 179 /* PropertyAccessExpression */) {
+                bindAssignmentTargetFlow(node.expression);
             }
-            if (isIdentifier() || token() === 97 /* ThisKeyword */) {
-                nextToken();
-                return true;
+        }
+        function bindConditionalExpressionFlow(node) {
+            var trueLabel = createBranchLabel();
+            var falseLabel = createBranchLabel();
+            var postExpressionLabel = createBranchLabel();
+            bindCondition(node.condition, trueLabel, falseLabel);
+            currentFlow = finishFlowLabel(trueLabel);
+            bind(node.questionToken);
+            bind(node.whenTrue);
+            addAntecedent(postExpressionLabel, currentFlow);
+            currentFlow = finishFlowLabel(falseLabel);
+            bind(node.colonToken);
+            bind(node.whenFalse);
+            addAntecedent(postExpressionLabel, currentFlow);
+            currentFlow = finishFlowLabel(postExpressionLabel);
+        }
+        function bindInitializedVariableFlow(node) {
+            var name = !ts.isOmittedExpression(node) ? node.name : undefined;
+            if (ts.isBindingPattern(name)) {
+                for (var _i = 0, _a = name.elements; _i < _a.length; _i++) {
+                    var child = _a[_i];
+                    bindInitializedVariableFlow(child);
+                }
             }
-            if (token() === 19 /* OpenBracketToken */ || token() === 15 /* OpenBraceToken */) {
-                // Return true if we can parse an array or object binding pattern with no errors
-                var previousErrorCount = parseDiagnostics.length;
-                parseIdentifierOrPattern();
-                return previousErrorCount === parseDiagnostics.length;
+            else {
+                currentFlow = createFlowAssignment(currentFlow, node);
             }
-            return false;
         }
-        function isUnambiguouslyStartOfFunctionType() {
-            nextToken();
-            if (token() === 18 /* CloseParenToken */ || token() === 22 /* DotDotDotToken */) {
-                // ( )
-                // ( ...
-                return true;
+        function bindVariableDeclarationFlow(node) {
+            bindEachChild(node);
+            if (node.initializer || ts.isForInOrOfStatement(node.parent.parent)) {
+                bindInitializedVariableFlow(node);
             }
-            if (skipParameterStart()) {
-                // We successfully skipped modifiers (if any) and an identifier or binding pattern,
-                // now see if we have something that indicates a parameter declaration
-                if (token() === 54 /* ColonToken */ || token() === 24 /* CommaToken */ ||
-                    token() === 53 /* QuestionToken */ || token() === 56 /* EqualsToken */) {
-                    // ( xxx :
-                    // ( xxx ,
-                    // ( xxx ?
-                    // ( xxx =
-                    return true;
+        }
+        function bindJSDocComment(node) {
+            ts.forEachChild(node, function (n) {
+                if (n.kind !== 291 /* JSDocTypedefTag */) {
+                    bind(n);
                 }
-                if (token() === 18 /* CloseParenToken */) {
-                    nextToken();
-                    if (token() === 34 /* EqualsGreaterThanToken */) {
-                        // ( xxx ) =>
-                        return true;
-                    }
+            });
+        }
+        function bindJSDocTypedefTag(node) {
+            ts.forEachChild(node, function (n) {
+                // if the node has a fullName "A.B.C", that means symbol "C" was already bound
+                // when we visit "fullName"; so when we visit the name "C" as the next child of
+                // the jsDocTypedefTag, we should skip binding it.
+                if (node.fullName && n === node.name && node.fullName.kind !== 71 /* Identifier */) {
+                    return;
                 }
-            }
-            return false;
+                bind(n);
+            });
         }
-        function parseTypeOrTypePredicate() {
-            var typePredicateVariable = isIdentifier() && tryParse(parseTypePredicatePrefix);
-            var type = parseType();
-            if (typePredicateVariable) {
-                var node = createNode(154 /* TypePredicate */, typePredicateVariable.pos);
-                node.parameterName = typePredicateVariable;
-                node.type = type;
-                return finishNode(node);
+        function bindCallExpressionFlow(node) {
+            // If the target of the call expression is a function expression or arrow function we have
+            // an immediately invoked function expression (IIFE). Initialize the flowNode property to
+            // the current control flow (which includes evaluation of the IIFE arguments).
+            var expr = node.expression;
+            while (expr.kind === 185 /* ParenthesizedExpression */) {
+                expr = expr.expression;
+            }
+            if (expr.kind === 186 /* FunctionExpression */ || expr.kind === 187 /* ArrowFunction */) {
+                bindEach(node.typeArguments);
+                bindEach(node.arguments);
+                bind(node.expression);
             }
             else {
-                return type;
+                bindEachChild(node);
             }
-        }
-        function parseTypePredicatePrefix() {
-            var id = parseIdentifier();
-            if (token() === 124 /* IsKeyword */ && !scanner.hasPrecedingLineBreak()) {
-                nextToken();
-                return id;
+            if (node.expression.kind === 179 /* PropertyAccessExpression */) {
+                var propertyAccess = node.expression;
+                if (isNarrowableOperand(propertyAccess.expression) && ts.isPushOrUnshiftIdentifier(propertyAccess.name)) {
+                    currentFlow = createFlowArrayMutation(currentFlow, node);
+                }
             }
         }
-        function parseType() {
-            // The rules about 'yield' only apply to actual code/expression contexts.  They don't
-            // apply to 'type' contexts.  So we disable these parameters here before moving on.
-            return doOutsideOfContext(327680 /* TypeExcludesFlags */, parseTypeWorker);
-        }
-        function parseTypeWorker() {
-            if (isStartOfFunctionType()) {
-                return parseFunctionOrConstructorType(156 /* FunctionType */);
+        function getContainerFlags(node) {
+            switch (node.kind) {
+                case 199 /* ClassExpression */:
+                case 229 /* ClassDeclaration */:
+                case 232 /* EnumDeclaration */:
+                case 178 /* ObjectLiteralExpression */:
+                case 163 /* TypeLiteral */:
+                case 293 /* JSDocTypeLiteral */:
+                case 275 /* JSDocRecordType */:
+                case 254 /* JsxAttributes */:
+                    return 1 /* IsContainer */;
+                case 230 /* InterfaceDeclaration */:
+                    return 1 /* IsContainer */ | 64 /* IsInterface */;
+                case 279 /* JSDocFunctionType */:
+                case 233 /* ModuleDeclaration */:
+                case 231 /* TypeAliasDeclaration */:
+                case 172 /* MappedType */:
+                    return 1 /* IsContainer */ | 32 /* HasLocals */;
+                case 265 /* SourceFile */:
+                    return 1 /* IsContainer */ | 4 /* IsControlFlowContainer */ | 32 /* HasLocals */;
+                case 151 /* MethodDeclaration */:
+                    if (ts.isObjectLiteralOrClassExpressionMethod(node)) {
+                        return 1 /* IsContainer */ | 4 /* IsControlFlowContainer */ | 32 /* HasLocals */ | 8 /* IsFunctionLike */ | 128 /* IsObjectLiteralOrClassExpressionMethod */;
+                    }
+                // falls through
+                case 152 /* Constructor */:
+                case 228 /* FunctionDeclaration */:
+                case 150 /* MethodSignature */:
+                case 153 /* GetAccessor */:
+                case 154 /* SetAccessor */:
+                case 155 /* CallSignature */:
+                case 156 /* ConstructSignature */:
+                case 157 /* IndexSignature */:
+                case 160 /* FunctionType */:
+                case 161 /* ConstructorType */:
+                    return 1 /* IsContainer */ | 4 /* IsControlFlowContainer */ | 32 /* HasLocals */ | 8 /* IsFunctionLike */;
+                case 186 /* FunctionExpression */:
+                case 187 /* ArrowFunction */:
+                    return 1 /* IsContainer */ | 4 /* IsControlFlowContainer */ | 32 /* HasLocals */ | 8 /* IsFunctionLike */ | 16 /* IsFunctionExpression */;
+                case 234 /* ModuleBlock */:
+                    return 4 /* IsControlFlowContainer */;
+                case 149 /* PropertyDeclaration */:
+                    return node.initializer ? 4 /* IsControlFlowContainer */ : 0;
+                case 260 /* CatchClause */:
+                case 214 /* ForStatement */:
+                case 215 /* ForInStatement */:
+                case 216 /* ForOfStatement */:
+                case 235 /* CaseBlock */:
+                    return 2 /* IsBlockScopedContainer */;
+                case 207 /* Block */:
+                    // do not treat blocks directly inside a function as a block-scoped-container.
+                    // Locals that reside in this block should go to the function locals. Otherwise 'x'
+                    // would not appear to be a redeclaration of a block scoped local in the following
+                    // example:
+                    //
+                    //      function foo() {
+                    //          var x;
+                    //          let x;
+                    //      }
+                    //
+                    // If we placed 'var x' into the function locals and 'let x' into the locals of
+                    // the block, then there would be no collision.
+                    //
+                    // By not creating a new block-scoped-container here, we ensure that both 'var x'
+                    // and 'let x' go into the Function-container's locals, and we do get a collision
+                    // conflict.
+                    return ts.isFunctionLike(node.parent) ? 0 /* None */ : 2 /* IsBlockScopedContainer */;
             }
-            if (token() === 92 /* NewKeyword */) {
-                return parseFunctionOrConstructorType(157 /* ConstructorType */);
+            return 0 /* None */;
+        }
+        function addToContainerChain(next) {
+            if (lastContainer) {
+                lastContainer.nextContainer = next;
             }
-            return parseUnionTypeOrHigher();
+            lastContainer = next;
         }
-        function parseTypeAnnotation() {
-            return parseOptional(54 /* ColonToken */) ? parseType() : undefined;
+        function declareSymbolAndAddToSymbolTable(node, symbolFlags, symbolExcludes) {
+            // Just call this directly so that the return type of this function stays "void".
+            return declareSymbolAndAddToSymbolTableWorker(node, symbolFlags, symbolExcludes);
         }
-        // EXPRESSIONS
-        function isStartOfLeftHandSideExpression() {
-            switch (token()) {
-                case 97 /* ThisKeyword */:
-                case 95 /* SuperKeyword */:
-                case 93 /* NullKeyword */:
-                case 99 /* TrueKeyword */:
-                case 84 /* FalseKeyword */:
-                case 8 /* NumericLiteral */:
-                case 9 /* StringLiteral */:
-                case 11 /* NoSubstitutionTemplateLiteral */:
-                case 12 /* TemplateHead */:
-                case 17 /* OpenParenToken */:
-                case 19 /* OpenBracketToken */:
-                case 15 /* OpenBraceToken */:
-                case 87 /* FunctionKeyword */:
-                case 73 /* ClassKeyword */:
-                case 92 /* NewKeyword */:
-                case 39 /* SlashToken */:
-                case 61 /* SlashEqualsToken */:
-                case 69 /* Identifier */:
-                    return true;
-                default:
-                    return isIdentifier();
+        function declareSymbolAndAddToSymbolTableWorker(node, symbolFlags, symbolExcludes) {
+            switch (container.kind) {
+                // Modules, source files, and classes need specialized handling for how their
+                // members are declared (for example, a member of a class will go into a specific
+                // symbol table depending on if it is static or not). We defer to specialized
+                // handlers to take care of declaring these child members.
+                case 233 /* ModuleDeclaration */:
+                    return declareModuleMember(node, symbolFlags, symbolExcludes);
+                case 265 /* SourceFile */:
+                    return declareSourceFileMember(node, symbolFlags, symbolExcludes);
+                case 199 /* ClassExpression */:
+                case 229 /* ClassDeclaration */:
+                    return declareClassMember(node, symbolFlags, symbolExcludes);
+                case 232 /* EnumDeclaration */:
+                    return declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
+                case 163 /* TypeLiteral */:
+                case 178 /* ObjectLiteralExpression */:
+                case 230 /* InterfaceDeclaration */:
+                case 275 /* JSDocRecordType */:
+                case 293 /* JSDocTypeLiteral */:
+                case 254 /* JsxAttributes */:
+                    // Interface/Object-types always have their children added to the 'members' of
+                    // their container. They are only accessible through an instance of their
+                    // container, and are never in scope otherwise (even inside the body of the
+                    // object / type / interface declaring them). An exception is type parameters,
+                    // which are in scope without qualification (similar to 'locals').
+                    return declareSymbol(container.symbol.members, container.symbol, node, symbolFlags, symbolExcludes);
+                case 160 /* FunctionType */:
+                case 161 /* ConstructorType */:
+                case 155 /* CallSignature */:
+                case 156 /* ConstructSignature */:
+                case 157 /* IndexSignature */:
+                case 151 /* MethodDeclaration */:
+                case 150 /* MethodSignature */:
+                case 152 /* Constructor */:
+                case 153 /* GetAccessor */:
+                case 154 /* SetAccessor */:
+                case 228 /* FunctionDeclaration */:
+                case 186 /* FunctionExpression */:
+                case 187 /* ArrowFunction */:
+                case 279 /* JSDocFunctionType */:
+                case 231 /* TypeAliasDeclaration */:
+                case 172 /* MappedType */:
+                    // All the children of these container types are never visible through another
+                    // symbol (i.e. through another symbol's 'exports' or 'members').  Instead,
+                    // they're only accessed 'lexically' (i.e. from code that exists underneath
+                    // their container in the tree). To accomplish this, we simply add their declared
+                    // symbol to the 'locals' of the container.  These symbols can then be found as
+                    // the type checker walks up the containers, checking them for matching names.
+                    return declareSymbol(container.locals, /*parent*/ undefined, node, symbolFlags, symbolExcludes);
             }
         }
-        function isStartOfExpression() {
-            if (isStartOfLeftHandSideExpression()) {
-                return true;
-            }
-            switch (token()) {
-                case 35 /* PlusToken */:
-                case 36 /* MinusToken */:
-                case 50 /* TildeToken */:
-                case 49 /* ExclamationToken */:
-                case 78 /* DeleteKeyword */:
-                case 101 /* TypeOfKeyword */:
-                case 103 /* VoidKeyword */:
-                case 41 /* PlusPlusToken */:
-                case 42 /* MinusMinusToken */:
-                case 25 /* LessThanToken */:
-                case 119 /* AwaitKeyword */:
-                case 114 /* YieldKeyword */:
-                    // Yield/await always starts an expression.  Either it is an identifier (in which case
-                    // it is definitely an expression).  Or it's a keyword (either because we're in
-                    // a generator or async function, or in strict mode (or both)) and it started a yield or await expression.
-                    return true;
-                default:
-                    // Error tolerance.  If we see the start of some binary operator, we consider
-                    // that the start of an expression.  That way we'll parse out a missing identifier,
-                    // give a good message about an identifier being missing, and then consume the
-                    // rest of the binary expression.
-                    if (isBinaryOperator()) {
+        function declareClassMember(node, symbolFlags, symbolExcludes) {
+            return ts.hasModifier(node, 32 /* Static */)
+                ? declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes)
+                : declareSymbol(container.symbol.members, container.symbol, node, symbolFlags, symbolExcludes);
+        }
+        function declareSourceFileMember(node, symbolFlags, symbolExcludes) {
+            return ts.isExternalModule(file)
+                ? declareModuleMember(node, symbolFlags, symbolExcludes)
+                : declareSymbol(file.locals, /*parent*/ undefined, node, symbolFlags, symbolExcludes);
+        }
+        function hasExportDeclarations(node) {
+            var body = node.kind === 265 /* SourceFile */ ? node : node.body;
+            if (body && (body.kind === 265 /* SourceFile */ || body.kind === 234 /* ModuleBlock */)) {
+                for (var _i = 0, _a = body.statements; _i < _a.length; _i++) {
+                    var stat = _a[_i];
+                    if (stat.kind === 244 /* ExportDeclaration */ || stat.kind === 243 /* ExportAssignment */) {
                         return true;
                     }
-                    return isIdentifier();
+                }
             }
+            return false;
         }
-        function isStartOfExpressionStatement() {
-            // As per the grammar, none of '{' or 'function' or 'class' can start an expression statement.
-            return token() !== 15 /* OpenBraceToken */ &&
-                token() !== 87 /* FunctionKeyword */ &&
-                token() !== 73 /* ClassKeyword */ &&
-                token() !== 55 /* AtToken */ &&
-                isStartOfExpression();
-        }
-        function parseExpression() {
-            // Expression[in]:
-            //      AssignmentExpression[in]
-            //      Expression[in] , AssignmentExpression[in]
-            // clear the decorator context when parsing Expression, as it should be unambiguous when parsing a decorator
-            var saveDecoratorContext = inDecoratorContext();
-            if (saveDecoratorContext) {
-                setDecoratorContext(/*val*/ false);
-            }
-            var expr = parseAssignmentExpressionOrHigher();
-            var operatorToken;
-            while ((operatorToken = parseOptionalToken(24 /* CommaToken */))) {
-                expr = makeBinaryExpression(expr, operatorToken, parseAssignmentExpressionOrHigher());
+        function setExportContextFlag(node) {
+            // A declaration source file or ambient module declaration that contains no export declarations (but possibly regular
+            // declarations with export modifiers) is an export context in which declarations are implicitly exported.
+            if (ts.isInAmbientContext(node) && !hasExportDeclarations(node)) {
+                node.flags |= 32 /* ExportContext */;
             }
-            if (saveDecoratorContext) {
-                setDecoratorContext(/*val*/ true);
+            else {
+                node.flags &= ~32 /* ExportContext */;
             }
-            return expr;
         }
-        function parseInitializer(inParameter) {
-            if (token() !== 56 /* EqualsToken */) {
-                // It's not uncommon during typing for the user to miss writing the '=' token.  Check if
-                // there is no newline after the last token and if we're on an expression.  If so, parse
-                // this as an equals-value clause with a missing equals.
-                // NOTE: There are two places where we allow equals-value clauses.  The first is in a
-                // variable declarator.  The second is with a parameter.  For variable declarators
-                // it's more likely that a { would be a allowed (as an object literal).  While this
-                // is also allowed for parameters, the risk is that we consume the { as an object
-                // literal when it really will be for the block following the parameter.
-                if (scanner.hasPrecedingLineBreak() || (inParameter && token() === 15 /* OpenBraceToken */) || !isStartOfExpression()) {
-                    // preceding line break, open brace in a parameter (likely a function body) or current token is not an expression -
-                    // do not try to parse initializer
-                    return undefined;
+        function bindModuleDeclaration(node) {
+            setExportContextFlag(node);
+            if (ts.isAmbientModule(node)) {
+                if (ts.hasModifier(node, 1 /* Export */)) {
+                    errorOnFirstToken(node, ts.Diagnostics.export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always_visible);
+                }
+                if (ts.isExternalModuleAugmentation(node)) {
+                    declareModuleSymbol(node);
+                }
+                else {
+                    var pattern = void 0;
+                    if (node.name.kind === 9 /* StringLiteral */) {
+                        var text = node.name.text;
+                        if (ts.hasZeroOrOneAsteriskCharacter(text)) {
+                            pattern = ts.tryParsePattern(text);
+                        }
+                        else {
+                            errorOnFirstToken(node.name, ts.Diagnostics.Pattern_0_can_have_at_most_one_Asterisk_character, text);
+                        }
+                    }
+                    var symbol = declareSymbolAndAddToSymbolTable(node, 512 /* ValueModule */, 106639 /* ValueModuleExcludes */);
+                    if (pattern) {
+                        (file.patternAmbientModules || (file.patternAmbientModules = [])).push({ pattern: pattern, symbol: symbol });
+                    }
                 }
             }
-            // Initializer[In, Yield] :
-            //     = AssignmentExpression[?In, ?Yield]
-            parseExpected(56 /* EqualsToken */);
-            return parseAssignmentExpressionOrHigher();
-        }
-        function parseAssignmentExpressionOrHigher() {
-            //  AssignmentExpression[in,yield]:
-            //      1) ConditionalExpression[?in,?yield]
-            //      2) LeftHandSideExpression = AssignmentExpression[?in,?yield]
-            //      3) LeftHandSideExpression AssignmentOperator AssignmentExpression[?in,?yield]
-            //      4) ArrowFunctionExpression[?in,?yield]
-            //      5) AsyncArrowFunctionExpression[in,yield,await]
-            //      6) [+Yield] YieldExpression[?In]
-            //
-            // Note: for ease of implementation we treat productions '2' and '3' as the same thing.
-            // (i.e. they're both BinaryExpressions with an assignment operator in it).
-            // First, do the simple check if we have a YieldExpression (production '6').
-            if (isYieldExpression()) {
-                return parseYieldExpression();
-            }
-            // Then, check if we have an arrow function (production '4' and '5') that starts with a parenthesized
-            // parameter list or is an async arrow function.
-            // AsyncArrowFunctionExpression:
-            //      1) async[no LineTerminator here]AsyncArrowBindingIdentifier[?Yield][no LineTerminator here]=>AsyncConciseBody[?In]
-            //      2) CoverCallExpressionAndAsyncArrowHead[?Yield, ?Await][no LineTerminator here]=>AsyncConciseBody[?In]
-            // Production (1) of AsyncArrowFunctionExpression is parsed in "tryParseAsyncSimpleArrowFunctionExpression".
-            // And production (2) is parsed in "tryParseParenthesizedArrowFunctionExpression".
-            //
-            // If we do successfully parse arrow-function, we must *not* recurse for productions 1, 2 or 3. An ArrowFunction is
-            // not a  LeftHandSideExpression, nor does it start a ConditionalExpression.  So we are done
-            // with AssignmentExpression if we see one.
-            var arrowExpression = tryParseParenthesizedArrowFunctionExpression() || tryParseAsyncSimpleArrowFunctionExpression();
-            if (arrowExpression) {
-                return arrowExpression;
+            else {
+                var state = declareModuleSymbol(node);
+                if (state !== 0 /* NonInstantiated */) {
+                    if (node.symbol.flags & (16 /* Function */ | 32 /* Class */ | 256 /* RegularEnum */)) {
+                        // if module was already merged with some function, class or non-const enum
+                        // treat is a non-const-enum-only
+                        node.symbol.constEnumOnlyModule = false;
+                    }
+                    else {
+                        var currentModuleIsConstEnumOnly = state === 2 /* ConstEnumOnly */;
+                        if (node.symbol.constEnumOnlyModule === undefined) {
+                            // non-merged case - use the current state
+                            node.symbol.constEnumOnlyModule = currentModuleIsConstEnumOnly;
+                        }
+                        else {
+                            // merged case: module is const enum only if all its pieces are non-instantiated or const enum
+                            node.symbol.constEnumOnlyModule = node.symbol.constEnumOnlyModule && currentModuleIsConstEnumOnly;
+                        }
+                    }
+                }
             }
-            // Now try to see if we're in production '1', '2' or '3'.  A conditional expression can
-            // start with a LogicalOrExpression, while the assignment productions can only start with
-            // LeftHandSideExpressions.
+        }
+        function declareModuleSymbol(node) {
+            var state = getModuleInstanceState(node);
+            var instantiated = state !== 0 /* NonInstantiated */;
+            declareSymbolAndAddToSymbolTable(node, instantiated ? 512 /* ValueModule */ : 1024 /* NamespaceModule */, instantiated ? 106639 /* ValueModuleExcludes */ : 0 /* NamespaceModuleExcludes */);
+            return state;
+        }
+        function bindFunctionOrConstructorType(node) {
+            // For a given function symbol "<...>(...) => T" we want to generate a symbol identical
+            // to the one we would get for: { <...>(...): T }
             //
-            // So, first, we try to just parse out a BinaryExpression.  If we get something that is a
-            // LeftHandSide or higher, then we can try to parse out the assignment expression part.
-            // Otherwise, we try to parse out the conditional expression bit.  We want to allow any
-            // binary expression here, so we pass in the 'lowest' precedence here so that it matches
-            // and consumes anything.
-            var expr = parseBinaryExpressionOrHigher(/*precedence*/ 0);
-            // To avoid a look-ahead, we did not handle the case of an arrow function with a single un-parenthesized
-            // parameter ('x => ...') above. We handle it here by checking if the parsed expression was a single
-            // identifier and the current token is an arrow.
-            if (expr.kind === 69 /* Identifier */ && token() === 34 /* EqualsGreaterThanToken */) {
-                return parseSimpleArrowFunctionExpression(expr);
+            // We do that by making an anonymous type literal symbol, and then setting the function
+            // symbol as its sole member. To the rest of the system, this symbol will be  indistinguishable
+            // from an actual type literal symbol you would have gotten had you used the long form.
+            var symbol = createSymbol(131072 /* Signature */, getDeclarationName(node));
+            addDeclarationToSymbol(symbol, node, 131072 /* Signature */);
+            var typeLiteralSymbol = createSymbol(2048 /* TypeLiteral */, "__type");
+            addDeclarationToSymbol(typeLiteralSymbol, node, 2048 /* TypeLiteral */);
+            typeLiteralSymbol.members = ts.createMap();
+            typeLiteralSymbol.members.set(symbol.name, symbol);
+        }
+        function bindObjectLiteralExpression(node) {
+            var ElementKind;
+            (function (ElementKind) {
+                ElementKind[ElementKind["Property"] = 1] = "Property";
+                ElementKind[ElementKind["Accessor"] = 2] = "Accessor";
+            })(ElementKind || (ElementKind = {}));
+            if (inStrictMode) {
+                var seen = ts.createMap();
+                for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
+                    var prop = _a[_i];
+                    if (prop.kind === 263 /* SpreadAssignment */ || prop.name.kind !== 71 /* Identifier */) {
+                        continue;
+                    }
+                    var identifier = prop.name;
+                    // ECMA-262 11.1.5 Object Initializer
+                    // If previous is not undefined then throw a SyntaxError exception if any of the following conditions are true
+                    // a.This production is contained in strict code and IsDataDescriptor(previous) is true and
+                    // IsDataDescriptor(propId.descriptor) is true.
+                    //    b.IsDataDescriptor(previous) is true and IsAccessorDescriptor(propId.descriptor) is true.
+                    //    c.IsAccessorDescriptor(previous) is true and IsDataDescriptor(propId.descriptor) is true.
+                    //    d.IsAccessorDescriptor(previous) is true and IsAccessorDescriptor(propId.descriptor) is true
+                    // and either both previous and propId.descriptor have[[Get]] fields or both previous and propId.descriptor have[[Set]] fields
+                    var currentKind = prop.kind === 261 /* PropertyAssignment */ || prop.kind === 262 /* ShorthandPropertyAssignment */ || prop.kind === 151 /* MethodDeclaration */
+                        ? 1 /* Property */
+                        : 2 /* Accessor */;
+                    var existingKind = seen.get(identifier.text);
+                    if (!existingKind) {
+                        seen.set(identifier.text, currentKind);
+                        continue;
+                    }
+                    if (currentKind === 1 /* Property */ && existingKind === 1 /* Property */) {
+                        var span_1 = ts.getErrorSpanForNode(file, identifier);
+                        file.bindDiagnostics.push(ts.createFileDiagnostic(file, span_1.start, span_1.length, ts.Diagnostics.An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode));
+                    }
+                }
             }
-            // Now see if we might be in cases '2' or '3'.
-            // If the expression was a LHS expression, and we have an assignment operator, then
-            // we're in '2' or '3'. Consume the assignment and return.
-            //
-            // Note: we call reScanGreaterToken so that we get an appropriately merged token
-            // for cases like > > =  becoming >>=
-            if (ts.isLeftHandSideExpression(expr) && ts.isAssignmentOperator(reScanGreaterToken())) {
-                return makeBinaryExpression(expr, parseTokenNode(), parseAssignmentExpressionOrHigher());
+            return bindAnonymousDeclaration(node, 4096 /* ObjectLiteral */, "__object");
+        }
+        function bindJsxAttributes(node) {
+            return bindAnonymousDeclaration(node, 4096 /* ObjectLiteral */, "__jsxAttributes");
+        }
+        function bindJsxAttribute(node, symbolFlags, symbolExcludes) {
+            return declareSymbolAndAddToSymbolTable(node, symbolFlags, symbolExcludes);
+        }
+        function bindAnonymousDeclaration(node, symbolFlags, name) {
+            var symbol = createSymbol(symbolFlags, name);
+            addDeclarationToSymbol(symbol, node, symbolFlags);
+        }
+        function bindBlockScopedDeclaration(node, symbolFlags, symbolExcludes) {
+            switch (blockScopeContainer.kind) {
+                case 233 /* ModuleDeclaration */:
+                    declareModuleMember(node, symbolFlags, symbolExcludes);
+                    break;
+                case 265 /* SourceFile */:
+                    if (ts.isExternalModule(container)) {
+                        declareModuleMember(node, symbolFlags, symbolExcludes);
+                        break;
+                    }
+                // falls through
+                default:
+                    if (!blockScopeContainer.locals) {
+                        blockScopeContainer.locals = ts.createMap();
+                        addToContainerChain(blockScopeContainer);
+                    }
+                    declareSymbol(blockScopeContainer.locals, /*parent*/ undefined, node, symbolFlags, symbolExcludes);
             }
-            // It wasn't an assignment or a lambda.  This is a conditional expression:
-            return parseConditionalExpressionRest(expr);
         }
-        function isYieldExpression() {
-            if (token() === 114 /* YieldKeyword */) {
-                // If we have a 'yield' keyword, and this is a context where yield expressions are
-                // allowed, then definitely parse out a yield expression.
-                if (inYieldContext()) {
-                    return true;
+        function bindBlockScopedVariableDeclaration(node) {
+            bindBlockScopedDeclaration(node, 2 /* BlockScopedVariable */, 107455 /* BlockScopedVariableExcludes */);
+        }
+        // The binder visits every node in the syntax tree so it is a convenient place to perform a single localized
+        // check for reserved words used as identifiers in strict mode code.
+        function checkStrictModeIdentifier(node) {
+            if (inStrictMode &&
+                node.originalKeywordKind >= 108 /* FirstFutureReservedWord */ &&
+                node.originalKeywordKind <= 116 /* LastFutureReservedWord */ &&
+                !ts.isIdentifierName(node) &&
+                !ts.isInAmbientContext(node)) {
+                // Report error only if there are no parse errors in file
+                if (!file.parseDiagnostics.length) {
+                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node, getStrictModeIdentifierMessage(node), ts.declarationNameToString(node)));
                 }
-                // We're in a context where 'yield expr' is not allowed.  However, if we can
-                // definitely tell that the user was trying to parse a 'yield expr' and not
-                // just a normal expr that start with a 'yield' identifier, then parse out
-                // a 'yield expr'.  We can then report an error later that they are only
-                // allowed in generator expressions.
-                //
-                // for example, if we see 'yield(foo)', then we'll have to treat that as an
-                // invocation expression of something called 'yield'.  However, if we have
-                // 'yield foo' then that is not legal as a normal expression, so we can
-                // definitely recognize this as a yield expression.
-                //
-                // for now we just check if the next token is an identifier.  More heuristics
-                // can be added here later as necessary.  We just need to make sure that we
-                // don't accidentally consume something legal.
-                return lookAhead(nextTokenIsIdentifierOrKeywordOrNumberOnSameLine);
             }
-            return false;
-        }
-        function nextTokenIsIdentifierOnSameLine() {
-            nextToken();
-            return !scanner.hasPrecedingLineBreak() && isIdentifier();
         }
-        function parseYieldExpression() {
-            var node = createNode(190 /* YieldExpression */);
-            // YieldExpression[In] :
-            //      yield
-            //      yield [no LineTerminator here] [Lexical goal InputElementRegExp]AssignmentExpression[?In, Yield]
-            //      yield [no LineTerminator here] * [Lexical goal InputElementRegExp]AssignmentExpression[?In, Yield]
-            nextToken();
-            if (!scanner.hasPrecedingLineBreak() &&
-                (token() === 37 /* AsteriskToken */ || isStartOfExpression())) {
-                node.asteriskToken = parseOptionalToken(37 /* AsteriskToken */);
-                node.expression = parseAssignmentExpressionOrHigher();
-                return finishNode(node);
+        function getStrictModeIdentifierMessage(node) {
+            // Provide specialized messages to help the user understand why we think they're in
+            // strict mode.
+            if (ts.getContainingClass(node)) {
+                return ts.Diagnostics.Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_strict_mode;
             }
-            else {
-                // if the next token is not on the same line as yield.  or we don't have an '*' or
-                // the start of an expression, then this is just a simple "yield" expression.
-                return finishNode(node);
+            if (file.externalModuleIndicator) {
+                return ts.Diagnostics.Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode;
             }
+            return ts.Diagnostics.Identifier_expected_0_is_a_reserved_word_in_strict_mode;
         }
-        function parseSimpleArrowFunctionExpression(identifier, asyncModifier) {
-            ts.Debug.assert(token() === 34 /* EqualsGreaterThanToken */, "parseSimpleArrowFunctionExpression should only have been called if we had a =>");
-            var node;
-            if (asyncModifier) {
-                node = createNode(180 /* ArrowFunction */, asyncModifier.pos);
-                node.modifiers = asyncModifier;
+        function checkStrictModeBinaryExpression(node) {
+            if (inStrictMode && ts.isLeftHandSideExpression(node.left) && ts.isAssignmentOperator(node.operatorToken.kind)) {
+                // ECMA 262 (Annex C) The identifier eval or arguments may not appear as the LeftHandSideExpression of an
+                // Assignment operator(11.13) or of a PostfixExpression(11.3)
+                checkStrictModeEvalOrArguments(node, node.left);
             }
-            else {
-                node = createNode(180 /* ArrowFunction */, identifier.pos);
+        }
+        function checkStrictModeCatchClause(node) {
+            // It is a SyntaxError if a TryStatement with a Catch occurs within strict code and the Identifier of the
+            // Catch production is eval or arguments
+            if (inStrictMode && node.variableDeclaration) {
+                checkStrictModeEvalOrArguments(node, node.variableDeclaration.name);
             }
-            var parameter = createNode(142 /* Parameter */, identifier.pos);
-            parameter.name = identifier;
-            finishNode(parameter);
-            node.parameters = createNodeArray([parameter], parameter.pos);
-            node.parameters.end = parameter.end;
-            node.equalsGreaterThanToken = parseExpectedToken(34 /* EqualsGreaterThanToken */, /*reportAtCurrentPosition*/ false, ts.Diagnostics._0_expected, "=>");
-            node.body = parseArrowFunctionExpressionBody(/*isAsync*/ !!asyncModifier);
-            return addJSDocComment(finishNode(node));
         }
-        function tryParseParenthesizedArrowFunctionExpression() {
-            var triState = isParenthesizedArrowFunctionExpression();
-            if (triState === 0 /* False */) {
-                // It's definitely not a parenthesized arrow function expression.
-                return undefined;
+        function checkStrictModeDeleteExpression(node) {
+            // Grammar checking
+            if (inStrictMode && node.expression.kind === 71 /* Identifier */) {
+                // When a delete operator occurs within strict mode code, a SyntaxError is thrown if its
+                // UnaryExpression is a direct reference to a variable, function argument, or function name
+                var span_2 = ts.getErrorSpanForNode(file, node.expression);
+                file.bindDiagnostics.push(ts.createFileDiagnostic(file, span_2.start, span_2.length, ts.Diagnostics.delete_cannot_be_called_on_an_identifier_in_strict_mode));
             }
-            // If we definitely have an arrow function, then we can just parse one, not requiring a
-            // following => or { token. Otherwise, we *might* have an arrow function.  Try to parse
-            // it out, but don't allow any ambiguity, and return 'undefined' if this could be an
-            // expression instead.
-            var arrowFunction = triState === 1 /* True */
-                ? parseParenthesizedArrowFunctionExpressionHead(/*allowAmbiguity*/ true)
-                : tryParse(parsePossibleParenthesizedArrowFunctionExpressionHead);
-            if (!arrowFunction) {
-                // Didn't appear to actually be a parenthesized arrow function.  Just bail out.
-                return undefined;
+        }
+        function isEvalOrArgumentsIdentifier(node) {
+            return node.kind === 71 /* Identifier */ &&
+                (node.text === "eval" || node.text === "arguments");
+        }
+        function checkStrictModeEvalOrArguments(contextNode, name) {
+            if (name && name.kind === 71 /* Identifier */) {
+                var identifier = name;
+                if (isEvalOrArgumentsIdentifier(identifier)) {
+                    // We check first if the name is inside class declaration or class expression; if so give explicit message
+                    // otherwise report generic error message.
+                    var span_3 = ts.getErrorSpanForNode(file, name);
+                    file.bindDiagnostics.push(ts.createFileDiagnostic(file, span_3.start, span_3.length, getStrictModeEvalOrArgumentsMessage(contextNode), identifier.text));
+                }
             }
-            var isAsync = !!(ts.getModifierFlags(arrowFunction) & 256 /* Async */);
-            // If we have an arrow, then try to parse the body. Even if not, try to parse if we
-            // have an opening brace, just in case we're in an error state.
-            var lastToken = token();
-            arrowFunction.equalsGreaterThanToken = parseExpectedToken(34 /* EqualsGreaterThanToken */, /*reportAtCurrentPosition*/ false, ts.Diagnostics._0_expected, "=>");
-            arrowFunction.body = (lastToken === 34 /* EqualsGreaterThanToken */ || lastToken === 15 /* OpenBraceToken */)
-                ? parseArrowFunctionExpressionBody(isAsync)
-                : parseIdentifier();
-            return addJSDocComment(finishNode(arrowFunction));
         }
-        //  True        -> We definitely expect a parenthesized arrow function here.
-        //  False       -> There *cannot* be a parenthesized arrow function here.
-        //  Unknown     -> There *might* be a parenthesized arrow function here.
-        //                 Speculatively look ahead to be sure, and rollback if not.
-        function isParenthesizedArrowFunctionExpression() {
-            if (token() === 17 /* OpenParenToken */ || token() === 25 /* LessThanToken */ || token() === 118 /* AsyncKeyword */) {
-                return lookAhead(isParenthesizedArrowFunctionExpressionWorker);
+        function getStrictModeEvalOrArgumentsMessage(node) {
+            // Provide specialized messages to help the user understand why we think they're in
+            // strict mode.
+            if (ts.getContainingClass(node)) {
+                return ts.Diagnostics.Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode;
             }
-            if (token() === 34 /* EqualsGreaterThanToken */) {
-                // ERROR RECOVERY TWEAK:
-                // If we see a standalone => try to parse it as an arrow function expression as that's
-                // likely what the user intended to write.
-                return 1 /* True */;
+            if (file.externalModuleIndicator) {
+                return ts.Diagnostics.Invalid_use_of_0_Modules_are_automatically_in_strict_mode;
             }
-            // Definitely not a parenthesized arrow function.
-            return 0 /* False */;
+            return ts.Diagnostics.Invalid_use_of_0_in_strict_mode;
         }
-        function isParenthesizedArrowFunctionExpressionWorker() {
-            if (token() === 118 /* AsyncKeyword */) {
-                nextToken();
-                if (scanner.hasPrecedingLineBreak()) {
-                    return 0 /* False */;
-                }
-                if (token() !== 17 /* OpenParenToken */ && token() !== 25 /* LessThanToken */) {
-                    return 0 /* False */;
-                }
+        function checkStrictModeFunctionName(node) {
+            if (inStrictMode) {
+                // It is a SyntaxError if the identifier eval or arguments appears within a FormalParameterList of a strict mode FunctionDeclaration or FunctionExpression (13.1))
+                checkStrictModeEvalOrArguments(node, node.name);
             }
-            var first = token();
-            var second = nextToken();
-            if (first === 17 /* OpenParenToken */) {
-                if (second === 18 /* CloseParenToken */) {
-                    // Simple cases: "() =>", "(): ", and  "() {".
-                    // This is an arrow function with no parameters.
-                    // The last one is not actually an arrow function,
-                    // but this is probably what the user intended.
-                    var third = nextToken();
-                    switch (third) {
-                        case 34 /* EqualsGreaterThanToken */:
-                        case 54 /* ColonToken */:
-                        case 15 /* OpenBraceToken */:
-                            return 1 /* True */;
-                        default:
-                            return 0 /* False */;
-                    }
-                }
-                // If encounter "([" or "({", this could be the start of a binding pattern.
-                // Examples:
-                //      ([ x ]) => { }
-                //      ({ x }) => { }
-                //      ([ x ])
-                //      ({ x })
-                if (second === 19 /* OpenBracketToken */ || second === 15 /* OpenBraceToken */) {
-                    return 2 /* Unknown */;
-                }
-                // Simple case: "(..."
-                // This is an arrow function with a rest parameter.
-                if (second === 22 /* DotDotDotToken */) {
-                    return 1 /* True */;
-                }
-                // If we had "(" followed by something that's not an identifier,
-                // then this definitely doesn't look like a lambda.
-                // Note: we could be a little more lenient and allow
-                // "(public" or "(private". These would not ever actually be allowed,
-                // but we could provide a good error message instead of bailing out.
-                if (!isIdentifier()) {
-                    return 0 /* False */;
-                }
-                // If we have something like "(a:", then we must have a
-                // type-annotated parameter in an arrow function expression.
-                if (nextToken() === 54 /* ColonToken */) {
-                    return 1 /* True */;
-                }
-                // This *could* be a parenthesized arrow function.
-                // Return Unknown to let the caller know.
-                return 2 /* Unknown */;
+        }
+        function getStrictModeBlockScopeFunctionDeclarationMessage(node) {
+            // Provide specialized messages to help the user understand why we think they're in
+            // strict mode.
+            if (ts.getContainingClass(node)) {
+                return ts.Diagnostics.Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Class_definitions_are_automatically_in_strict_mode;
             }
-            else {
-                ts.Debug.assert(first === 25 /* LessThanToken */);
-                // If we have "<" not followed by an identifier,
-                // then this definitely is not an arrow function.
-                if (!isIdentifier()) {
-                    return 0 /* False */;
-                }
-                // JSX overrides
-                if (sourceFile.languageVariant === 1 /* JSX */) {
-                    var isArrowFunctionInJsx = lookAhead(function () {
-                        var third = nextToken();
-                        if (third === 83 /* ExtendsKeyword */) {
-                            var fourth = nextToken();
-                            switch (fourth) {
-                                case 56 /* EqualsToken */:
-                                case 27 /* GreaterThanToken */:
-                                    return false;
-                                default:
-                                    return true;
-                            }
-                        }
-                        else if (third === 24 /* CommaToken */) {
-                            return true;
-                        }
-                        return false;
-                    });
-                    if (isArrowFunctionInJsx) {
-                        return 1 /* True */;
-                    }
-                    return 0 /* False */;
+            if (file.externalModuleIndicator) {
+                return ts.Diagnostics.Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_are_automatically_in_strict_mode;
+            }
+            return ts.Diagnostics.Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5;
+        }
+        function checkStrictModeFunctionDeclaration(node) {
+            if (languageVersion < 2 /* ES2015 */) {
+                // Report error if function is not top level function declaration
+                if (blockScopeContainer.kind !== 265 /* SourceFile */ &&
+                    blockScopeContainer.kind !== 233 /* ModuleDeclaration */ &&
+                    !ts.isFunctionLike(blockScopeContainer)) {
+                    // We check first if the name is inside class declaration or class expression; if so give explicit message
+                    // otherwise report generic error message.
+                    var errorSpan = ts.getErrorSpanForNode(file, node);
+                    file.bindDiagnostics.push(ts.createFileDiagnostic(file, errorSpan.start, errorSpan.length, getStrictModeBlockScopeFunctionDeclarationMessage(node)));
                 }
-                // This *could* be a parenthesized arrow function.
-                return 2 /* Unknown */;
             }
         }
-        function parsePossibleParenthesizedArrowFunctionExpressionHead() {
-            return parseParenthesizedArrowFunctionExpressionHead(/*allowAmbiguity*/ false);
+        function checkStrictModeNumericLiteral(node) {
+            if (inStrictMode && node.numericLiteralFlags & 4 /* Octal */) {
+                file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Octal_literals_are_not_allowed_in_strict_mode));
+            }
         }
-        function tryParseAsyncSimpleArrowFunctionExpression() {
-            // We do a check here so that we won't be doing unnecessarily call to "lookAhead"
-            if (token() === 118 /* AsyncKeyword */) {
-                var isUnParenthesizedAsyncArrowFunction = lookAhead(isUnParenthesizedAsyncArrowFunctionWorker);
-                if (isUnParenthesizedAsyncArrowFunction === 1 /* True */) {
-                    var asyncModifier = parseModifiersForArrowFunction();
-                    var expr = parseBinaryExpressionOrHigher(/*precedence*/ 0);
-                    return parseSimpleArrowFunctionExpression(expr, asyncModifier);
+        function checkStrictModePostfixUnaryExpression(node) {
+            // Grammar checking
+            // The identifier eval or arguments may not appear as the LeftHandSideExpression of an
+            // Assignment operator(11.13) or of a PostfixExpression(11.3) or as the UnaryExpression
+            // operated upon by a Prefix Increment(11.4.4) or a Prefix Decrement(11.4.5) operator.
+            if (inStrictMode) {
+                checkStrictModeEvalOrArguments(node, node.operand);
+            }
+        }
+        function checkStrictModePrefixUnaryExpression(node) {
+            // Grammar checking
+            if (inStrictMode) {
+                if (node.operator === 43 /* PlusPlusToken */ || node.operator === 44 /* MinusMinusToken */) {
+                    checkStrictModeEvalOrArguments(node, node.operand);
                 }
             }
-            return undefined;
         }
-        function isUnParenthesizedAsyncArrowFunctionWorker() {
-            // AsyncArrowFunctionExpression:
-            //      1) async[no LineTerminator here]AsyncArrowBindingIdentifier[?Yield][no LineTerminator here]=>AsyncConciseBody[?In]
-            //      2) CoverCallExpressionAndAsyncArrowHead[?Yield, ?Await][no LineTerminator here]=>AsyncConciseBody[?In]
-            if (token() === 118 /* AsyncKeyword */) {
-                nextToken();
-                // If the "async" is followed by "=>" token then it is not a begining of an async arrow-function
-                // but instead a simple arrow-function which will be parsed inside "parseAssignmentExpressionOrHigher"
-                if (scanner.hasPrecedingLineBreak() || token() === 34 /* EqualsGreaterThanToken */) {
-                    return 0 /* False */;
+        function checkStrictModeWithStatement(node) {
+            // Grammar checking for withStatement
+            if (inStrictMode) {
+                errorOnFirstToken(node, ts.Diagnostics.with_statements_are_not_allowed_in_strict_mode);
+            }
+        }
+        function errorOnFirstToken(node, message, arg0, arg1, arg2) {
+            var span = ts.getSpanOfTokenAtPosition(file, node.pos);
+            file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, message, arg0, arg1, arg2));
+        }
+        function getDestructuringParameterName(node) {
+            return "__" + ts.indexOf(node.parent.parameters, node);
+        }
+        function bind(node) {
+            if (!node) {
+                return;
+            }
+            node.parent = parent;
+            var saveInStrictMode = inStrictMode;
+            // Even though in the AST the jsdoc @typedef node belongs to the current node,
+            // its symbol might be in the same scope with the current node's symbol. Consider:
+            //
+            //     /** @typedef {string | number} MyType */
+            //     function foo();
+            //
+            // Here the current node is "foo", which is a container, but the scope of "MyType" should
+            // not be inside "foo". Therefore we always bind @typedef before bind the parent node,
+            // and skip binding this tag later when binding all the other jsdoc tags.
+            if (ts.isInJavaScriptFile(node))
+                bindJSDocTypedefTagIfAny(node);
+            // First we bind declaration nodes to a symbol if possible. We'll both create a symbol
+            // and then potentially add the symbol to an appropriate symbol table. Possible
+            // destination symbol tables are:
+            //
+            //  1) The 'exports' table of the current container's symbol.
+            //  2) The 'members' table of the current container's symbol.
+            //  3) The 'locals' table of the current container.
+            //
+            // However, not all symbols will end up in any of these tables. 'Anonymous' symbols
+            // (like TypeLiterals for example) will not be put in any table.
+            bindWorker(node);
+            // Then we recurse into the children of the node to bind them as well. For certain
+            // symbols we do specialized work when we recurse. For example, we'll keep track of
+            // the current 'container' node when it changes. This helps us know which symbol table
+            // a local should go into for example. Since terminal nodes are known not to have
+            // children, as an optimization we don't process those.
+            if (node.kind > 142 /* LastToken */) {
+                var saveParent = parent;
+                parent = node;
+                var containerFlags = getContainerFlags(node);
+                if (containerFlags === 0 /* None */) {
+                    bindChildren(node);
                 }
-                // Check for un-parenthesized AsyncArrowFunction
-                var expr = parseBinaryExpressionOrHigher(/*precedence*/ 0);
-                if (!scanner.hasPrecedingLineBreak() && expr.kind === 69 /* Identifier */ && token() === 34 /* EqualsGreaterThanToken */) {
-                    return 1 /* True */;
+                else {
+                    bindContainer(node, containerFlags);
                 }
+                parent = saveParent;
             }
-            return 0 /* False */;
+            else if (!skipTransformFlagAggregation && (node.transformFlags & 536870912 /* HasComputedFlags */) === 0) {
+                subtreeTransformFlags |= computeTransformFlagsForNode(node, 0);
+            }
+            inStrictMode = saveInStrictMode;
         }
-        function parseParenthesizedArrowFunctionExpressionHead(allowAmbiguity) {
-            var node = createNode(180 /* ArrowFunction */);
-            node.modifiers = parseModifiersForArrowFunction();
-            var isAsync = !!(ts.getModifierFlags(node) & 256 /* Async */);
-            // Arrow functions are never generators.
-            //
-            // If we're speculatively parsing a signature for a parenthesized arrow function, then
-            // we have to have a complete parameter list.  Otherwise we might see something like
-            // a => (b => c)
-            // And think that "(b =>" was actually a parenthesized arrow function with a missing
-            // close paren.
-            fillSignature(54 /* ColonToken */, /*yieldContext*/ false, /*awaitContext*/ isAsync, /*requireCompleteParameterList*/ !allowAmbiguity, node);
-            // If we couldn't get parameters, we definitely could not parse out an arrow function.
-            if (!node.parameters) {
-                return undefined;
+        function bindJSDocTypedefTagIfAny(node) {
+            if (!node.jsDoc) {
+                return;
             }
-            // Parsing a signature isn't enough.
-            // Parenthesized arrow signatures often look like other valid expressions.
-            // For instance:
-            //  - "(x = 10)" is an assignment expression parsed as a signature with a default parameter value.
-            //  - "(x,y)" is a comma expression parsed as a signature with two parameters.
-            //  - "a ? (b): c" will have "(b):" parsed as a signature with a return type annotation.
-            //
-            // So we need just a bit of lookahead to ensure that it can only be a signature.
-            if (!allowAmbiguity && token() !== 34 /* EqualsGreaterThanToken */ && token() !== 15 /* OpenBraceToken */) {
-                // Returning undefined here will cause our caller to rewind to where we started from.
-                return undefined;
+            for (var _i = 0, _a = node.jsDoc; _i < _a.length; _i++) {
+                var jsDoc = _a[_i];
+                if (!jsDoc.tags) {
+                    continue;
+                }
+                for (var _b = 0, _c = jsDoc.tags; _b < _c.length; _b++) {
+                    var tag = _c[_b];
+                    if (tag.kind === 291 /* JSDocTypedefTag */) {
+                        var savedParent = parent;
+                        parent = jsDoc;
+                        bind(tag);
+                        parent = savedParent;
+                    }
+                }
             }
-            return node;
         }
-        function parseArrowFunctionExpressionBody(isAsync) {
-            if (token() === 15 /* OpenBraceToken */) {
-                return parseFunctionBlock(/*allowYield*/ false, /*allowAwait*/ isAsync, /*ignoreMissingOpenBrace*/ false);
+        function updateStrictModeStatementList(statements) {
+            if (!inStrictMode) {
+                for (var _i = 0, statements_1 = statements; _i < statements_1.length; _i++) {
+                    var statement = statements_1[_i];
+                    if (!ts.isPrologueDirective(statement)) {
+                        return;
+                    }
+                    if (isUseStrictPrologueDirective(statement)) {
+                        inStrictMode = true;
+                        return;
+                    }
+                }
             }
-            if (token() !== 23 /* SemicolonToken */ &&
-                token() !== 87 /* FunctionKeyword */ &&
-                token() !== 73 /* ClassKeyword */ &&
-                isStartOfStatement() &&
-                !isStartOfExpressionStatement()) {
-                // Check if we got a plain statement (i.e. no expression-statements, no function/class expressions/declarations)
-                //
-                // Here we try to recover from a potential error situation in the case where the
-                // user meant to supply a block. For example, if the user wrote:
-                //
-                //  a =>
-                //      let v = 0;
-                //  }
-                //
-                // they may be missing an open brace.  Check to see if that's the case so we can
-                // try to recover better.  If we don't do this, then the next close curly we see may end
-                // up preemptively closing the containing construct.
-                //
-                // Note: even when 'ignoreMissingOpenBrace' is passed as true, parseBody will still error.
-                return parseFunctionBlock(/*allowYield*/ false, /*allowAwait*/ isAsync, /*ignoreMissingOpenBrace*/ true);
+        }
+        /// Should be called only on prologue directives (isPrologueDirective(node) should be true)
+        function isUseStrictPrologueDirective(node) {
+            var nodeText = ts.getTextOfNodeFromSourceText(file.text, node.expression);
+            // Note: the node text must be exactly "use strict" or 'use strict'.  It is not ok for the
+            // string to contain unicode escapes (as per ES5).
+            return nodeText === '"use strict"' || nodeText === "'use strict'";
+        }
+        function bindWorker(node) {
+            switch (node.kind) {
+                /* Strict mode checks */
+                case 71 /* Identifier */:
+                    // for typedef type names with namespaces, bind the new jsdoc type symbol here
+                    // because it requires all containing namespaces to be in effect, namely the
+                    // current "blockScopeContainer" needs to be set to its immediate namespace parent.
+                    if (node.isInJSDocNamespace) {
+                        var parentNode = node.parent;
+                        while (parentNode && parentNode.kind !== 291 /* JSDocTypedefTag */) {
+                            parentNode = parentNode.parent;
+                        }
+                        bindBlockScopedDeclaration(parentNode, 524288 /* TypeAlias */, 793064 /* TypeAliasExcludes */);
+                        break;
+                    }
+                // falls through
+                case 99 /* ThisKeyword */:
+                    if (currentFlow && (ts.isExpression(node) || parent.kind === 262 /* ShorthandPropertyAssignment */)) {
+                        node.flowNode = currentFlow;
+                    }
+                    return checkStrictModeIdentifier(node);
+                case 179 /* PropertyAccessExpression */:
+                    if (currentFlow && isNarrowableReference(node)) {
+                        node.flowNode = currentFlow;
+                    }
+                    break;
+                case 194 /* BinaryExpression */:
+                    var specialKind = ts.getSpecialPropertyAssignmentKind(node);
+                    switch (specialKind) {
+                        case 1 /* ExportsProperty */:
+                            bindExportsPropertyAssignment(node);
+                            break;
+                        case 2 /* ModuleExports */:
+                            bindModuleExportsAssignment(node);
+                            break;
+                        case 3 /* PrototypeProperty */:
+                            bindPrototypePropertyAssignment(node);
+                            break;
+                        case 4 /* ThisProperty */:
+                            bindThisPropertyAssignment(node);
+                            break;
+                        case 5 /* Property */:
+                            bindStaticPropertyAssignment(node);
+                            break;
+                        case 0 /* None */:
+                            // Nothing to do
+                            break;
+                        default:
+                            ts.Debug.fail("Unknown special property assignment kind");
+                    }
+                    return checkStrictModeBinaryExpression(node);
+                case 260 /* CatchClause */:
+                    return checkStrictModeCatchClause(node);
+                case 188 /* DeleteExpression */:
+                    return checkStrictModeDeleteExpression(node);
+                case 8 /* NumericLiteral */:
+                    return checkStrictModeNumericLiteral(node);
+                case 193 /* PostfixUnaryExpression */:
+                    return checkStrictModePostfixUnaryExpression(node);
+                case 192 /* PrefixUnaryExpression */:
+                    return checkStrictModePrefixUnaryExpression(node);
+                case 220 /* WithStatement */:
+                    return checkStrictModeWithStatement(node);
+                case 169 /* ThisType */:
+                    seenThisKeyword = true;
+                    return;
+                case 158 /* TypePredicate */:
+                    return checkTypePredicate(node);
+                case 145 /* TypeParameter */:
+                    return declareSymbolAndAddToSymbolTable(node, 262144 /* TypeParameter */, 530920 /* TypeParameterExcludes */);
+                case 146 /* Parameter */:
+                    return bindParameter(node);
+                case 226 /* VariableDeclaration */:
+                case 176 /* BindingElement */:
+                    return bindVariableDeclarationOrBindingElement(node);
+                case 149 /* PropertyDeclaration */:
+                case 148 /* PropertySignature */:
+                    return bindPropertyWorker(node);
+                case 261 /* PropertyAssignment */:
+                case 262 /* ShorthandPropertyAssignment */:
+                    return bindPropertyOrMethodOrAccessor(node, 4 /* Property */, 0 /* PropertyExcludes */);
+                case 264 /* EnumMember */:
+                    return bindPropertyOrMethodOrAccessor(node, 8 /* EnumMember */, 900095 /* EnumMemberExcludes */);
+                case 263 /* SpreadAssignment */:
+                case 255 /* JsxSpreadAttribute */:
+                    var root = container;
+                    var hasRest = false;
+                    while (root.parent) {
+                        if (root.kind === 178 /* ObjectLiteralExpression */ &&
+                            root.parent.kind === 194 /* BinaryExpression */ &&
+                            root.parent.operatorToken.kind === 58 /* EqualsToken */ &&
+                            root.parent.left === root) {
+                            hasRest = true;
+                            break;
+                        }
+                        root = root.parent;
+                    }
+                    return;
+                case 155 /* CallSignature */:
+                case 156 /* ConstructSignature */:
+                case 157 /* IndexSignature */:
+                    return declareSymbolAndAddToSymbolTable(node, 131072 /* Signature */, 0 /* None */);
+                case 151 /* MethodDeclaration */:
+                case 150 /* MethodSignature */:
+                    // If this is an ObjectLiteralExpression method, then it sits in the same space
+                    // as other properties in the object literal.  So we use SymbolFlags.PropertyExcludes
+                    // so that it will conflict with any other object literal members with the same
+                    // name.
+                    return bindPropertyOrMethodOrAccessor(node, 8192 /* Method */ | (node.questionToken ? 67108864 /* Optional */ : 0 /* None */), ts.isObjectLiteralMethod(node) ? 0 /* PropertyExcludes */ : 99263 /* MethodExcludes */);
+                case 228 /* FunctionDeclaration */:
+                    return bindFunctionDeclaration(node);
+                case 152 /* Constructor */:
+                    return declareSymbolAndAddToSymbolTable(node, 16384 /* Constructor */, /*symbolExcludes:*/ 0 /* None */);
+                case 153 /* GetAccessor */:
+                    return bindPropertyOrMethodOrAccessor(node, 32768 /* GetAccessor */, 41919 /* GetAccessorExcludes */);
+                case 154 /* SetAccessor */:
+                    return bindPropertyOrMethodOrAccessor(node, 65536 /* SetAccessor */, 74687 /* SetAccessorExcludes */);
+                case 160 /* FunctionType */:
+                case 161 /* ConstructorType */:
+                    return bindFunctionOrConstructorType(node);
+                case 163 /* TypeLiteral */:
+                case 172 /* MappedType */:
+                    return bindAnonymousTypeWorker(node);
+                case 178 /* ObjectLiteralExpression */:
+                    return bindObjectLiteralExpression(node);
+                case 186 /* FunctionExpression */:
+                case 187 /* ArrowFunction */:
+                    return bindFunctionExpression(node);
+                case 181 /* CallExpression */:
+                    if (ts.isInJavaScriptFile(node)) {
+                        bindCallExpression(node);
+                    }
+                    break;
+                // Members of classes, interfaces, and modules
+                case 199 /* ClassExpression */:
+                case 229 /* ClassDeclaration */:
+                    // All classes are automatically in strict mode in ES6.
+                    inStrictMode = true;
+                    return bindClassLikeDeclaration(node);
+                case 230 /* InterfaceDeclaration */:
+                    return bindBlockScopedDeclaration(node, 64 /* Interface */, 792968 /* InterfaceExcludes */);
+                case 231 /* TypeAliasDeclaration */:
+                    return bindBlockScopedDeclaration(node, 524288 /* TypeAlias */, 793064 /* TypeAliasExcludes */);
+                case 232 /* EnumDeclaration */:
+                    return bindEnumDeclaration(node);
+                case 233 /* ModuleDeclaration */:
+                    return bindModuleDeclaration(node);
+                // Jsx-attributes
+                case 254 /* JsxAttributes */:
+                    return bindJsxAttributes(node);
+                case 253 /* JsxAttribute */:
+                    return bindJsxAttribute(node, 4 /* Property */, 0 /* PropertyExcludes */);
+                // Imports and exports
+                case 237 /* ImportEqualsDeclaration */:
+                case 240 /* NamespaceImport */:
+                case 242 /* ImportSpecifier */:
+                case 246 /* ExportSpecifier */:
+                    return declareSymbolAndAddToSymbolTable(node, 8388608 /* Alias */, 8388608 /* AliasExcludes */);
+                case 236 /* NamespaceExportDeclaration */:
+                    return bindNamespaceExportDeclaration(node);
+                case 239 /* ImportClause */:
+                    return bindImportClause(node);
+                case 244 /* ExportDeclaration */:
+                    return bindExportDeclaration(node);
+                case 243 /* ExportAssignment */:
+                    return bindExportAssignment(node);
+                case 265 /* SourceFile */:
+                    updateStrictModeStatementList(node.statements);
+                    return bindSourceFileIfExternalModule();
+                case 207 /* Block */:
+                    if (!ts.isFunctionLike(node.parent)) {
+                        return;
+                    }
+                // falls through
+                case 234 /* ModuleBlock */:
+                    return updateStrictModeStatementList(node.statements);
+                case 276 /* JSDocRecordMember */:
+                    return bindPropertyWorker(node);
+                case 292 /* JSDocPropertyTag */:
+                    return declareSymbolAndAddToSymbolTable(node, node.isBracketed || (node.typeExpression && node.typeExpression.type.kind === 278 /* JSDocOptionalType */) ?
+                        4 /* Property */ | 67108864 /* Optional */ : 4 /* Property */, 0 /* PropertyExcludes */);
+                case 279 /* JSDocFunctionType */:
+                    return bindFunctionOrConstructorType(node);
+                case 293 /* JSDocTypeLiteral */:
+                case 275 /* JSDocRecordType */:
+                    return bindAnonymousTypeWorker(node);
+                case 291 /* JSDocTypedefTag */: {
+                    var fullName = node.fullName;
+                    if (!fullName || fullName.kind === 71 /* Identifier */) {
+                        return bindBlockScopedDeclaration(node, 524288 /* TypeAlias */, 793064 /* TypeAliasExcludes */);
+                    }
+                    break;
+                }
             }
-            return isAsync
-                ? doInAwaitContext(parseAssignmentExpressionOrHigher)
-                : doOutsideOfAwaitContext(parseAssignmentExpressionOrHigher);
         }
-        function parseConditionalExpressionRest(leftOperand) {
-            // Note: we are passed in an expression which was produced from parseBinaryExpressionOrHigher.
-            var questionToken = parseOptionalToken(53 /* QuestionToken */);
-            if (!questionToken) {
-                return leftOperand;
+        function bindPropertyWorker(node) {
+            return bindPropertyOrMethodOrAccessor(node, 4 /* Property */ | (node.questionToken ? 67108864 /* Optional */ : 0 /* None */), 0 /* PropertyExcludes */);
+        }
+        function bindAnonymousTypeWorker(node) {
+            return bindAnonymousDeclaration(node, 2048 /* TypeLiteral */, "__type");
+        }
+        function checkTypePredicate(node) {
+            var parameterName = node.parameterName, type = node.type;
+            if (parameterName && parameterName.kind === 71 /* Identifier */) {
+                checkStrictModeIdentifier(parameterName);
             }
-            // Note: we explicitly 'allowIn' in the whenTrue part of the condition expression, and
-            // we do not that for the 'whenFalse' part.
-            var node = createNode(188 /* ConditionalExpression */, leftOperand.pos);
-            node.condition = leftOperand;
-            node.questionToken = questionToken;
-            node.whenTrue = doOutsideOfContext(disallowInAndDecoratorContext, parseAssignmentExpressionOrHigher);
-            node.colonToken = parseExpectedToken(54 /* ColonToken */, /*reportAtCurrentPosition*/ false, ts.Diagnostics._0_expected, ts.tokenToString(54 /* ColonToken */));
-            node.whenFalse = parseAssignmentExpressionOrHigher();
-            return finishNode(node);
+            if (parameterName && parameterName.kind === 169 /* ThisType */) {
+                seenThisKeyword = true;
+            }
+            bind(type);
         }
-        function parseBinaryExpressionOrHigher(precedence) {
-            var leftOperand = parseUnaryExpressionOrHigher();
-            return parseBinaryExpressionRest(precedence, leftOperand);
+        function bindSourceFileIfExternalModule() {
+            setExportContextFlag(file);
+            if (ts.isExternalModule(file)) {
+                bindSourceFileAsExternalModule();
+            }
         }
-        function isInOrOfKeyword(t) {
-            return t === 90 /* InKeyword */ || t === 138 /* OfKeyword */;
+        function bindSourceFileAsExternalModule() {
+            bindAnonymousDeclaration(file, 512 /* ValueModule */, "\"" + ts.removeFileExtension(file.fileName) + "\"");
         }
-        function parseBinaryExpressionRest(precedence, leftOperand) {
-            while (true) {
-                // We either have a binary operator here, or we're finished.  We call
-                // reScanGreaterToken so that we merge token sequences like > and = into >=
-                reScanGreaterToken();
-                var newPrecedence = getBinaryOperatorPrecedence();
-                // Check the precedence to see if we should "take" this operator
-                // - For left associative operator (all operator but **), consume the operator,
-                //   recursively call the function below, and parse binaryExpression as a rightOperand
-                //   of the caller if the new precedence of the operator is greater then or equal to the current precedence.
-                //   For example:
-                //      a - b - c;
-                //            ^token; leftOperand = b. Return b to the caller as a rightOperand
-                //      a * b - c
-                //            ^token; leftOperand = b. Return b to the caller as a rightOperand
-                //      a - b * c;
-                //            ^token; leftOperand = b. Return b * c to the caller as a rightOperand
-                // - For right associative operator (**), consume the operator, recursively call the function
-                //   and parse binaryExpression as a rightOperand of the caller if the new precedence of
-                //   the operator is strictly grater than the current precedence
-                //   For example:
-                //      a ** b ** c;
-                //             ^^token; leftOperand = b. Return b ** c to the caller as a rightOperand
-                //      a - b ** c;
-                //            ^^token; leftOperand = b. Return b ** c to the caller as a rightOperand
-                //      a ** b - c
-                //             ^token; leftOperand = b. Return b to the caller as a rightOperand
-                var consumeCurrentOperator = token() === 38 /* AsteriskAsteriskToken */ ?
-                    newPrecedence >= precedence :
-                    newPrecedence > precedence;
-                if (!consumeCurrentOperator) {
-                    break;
-                }
-                if (token() === 90 /* InKeyword */ && inDisallowInContext()) {
-                    break;
-                }
-                if (token() === 116 /* AsKeyword */) {
-                    // Make sure we *do* perform ASI for constructs like this:
-                    //    var x = foo
-                    //    as (Bar)
-                    // This should be parsed as an initialized variable, followed
-                    // by a function call to 'as' with the argument 'Bar'
-                    if (scanner.hasPrecedingLineBreak()) {
-                        break;
-                    }
-                    else {
-                        nextToken();
-                        leftOperand = makeAsExpression(leftOperand, parseType());
-                    }
+        function bindExportAssignment(node) {
+            if (!container.symbol || !container.symbol.exports) {
+                // Export assignment in some sort of block construct
+                bindAnonymousDeclaration(node, 8388608 /* Alias */, getDeclarationName(node));
+            }
+            else {
+                // An export default clause with an expression exports a value
+                // We want to exclude both class and function here,  this is necessary to issue an error when there are both
+                // default export-assignment and default export function and class declaration.
+                var flags = node.kind === 243 /* ExportAssignment */ && ts.exportAssignmentIsAlias(node)
+                    ? 8388608 /* Alias */
+                    : 4 /* Property */;
+                declareSymbol(container.symbol.exports, container.symbol, node, flags, 4 /* Property */ | 8388608 /* AliasExcludes */ | 32 /* Class */ | 16 /* Function */);
+            }
+        }
+        function bindNamespaceExportDeclaration(node) {
+            if (node.modifiers && node.modifiers.length) {
+                file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Modifiers_cannot_appear_here));
+            }
+            if (node.parent.kind !== 265 /* SourceFile */) {
+                file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Global_module_exports_may_only_appear_at_top_level));
+                return;
+            }
+            else {
+                var parent_4 = node.parent;
+                if (!ts.isExternalModule(parent_4)) {
+                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Global_module_exports_may_only_appear_in_module_files));
+                    return;
                 }
-                else {
-                    leftOperand = makeBinaryExpression(leftOperand, parseTokenNode(), parseBinaryExpressionOrHigher(newPrecedence));
+                if (!parent_4.isDeclarationFile) {
+                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Global_module_exports_may_only_appear_in_declaration_files));
+                    return;
                 }
             }
-            return leftOperand;
+            file.symbol.globalExports = file.symbol.globalExports || ts.createMap();
+            declareSymbol(file.symbol.globalExports, file.symbol, node, 8388608 /* Alias */, 8388608 /* AliasExcludes */);
         }
-        function isBinaryOperator() {
-            if (inDisallowInContext() && token() === 90 /* InKeyword */) {
-                return false;
+        function bindExportDeclaration(node) {
+            if (!container.symbol || !container.symbol.exports) {
+                // Export * in some sort of block construct
+                bindAnonymousDeclaration(node, 33554432 /* ExportStar */, getDeclarationName(node));
             }
-            return getBinaryOperatorPrecedence() > 0;
-        }
-        function getBinaryOperatorPrecedence() {
-            switch (token()) {
-                case 52 /* BarBarToken */:
-                    return 1;
-                case 51 /* AmpersandAmpersandToken */:
-                    return 2;
-                case 47 /* BarToken */:
-                    return 3;
-                case 48 /* CaretToken */:
-                    return 4;
-                case 46 /* AmpersandToken */:
-                    return 5;
-                case 30 /* EqualsEqualsToken */:
-                case 31 /* ExclamationEqualsToken */:
-                case 32 /* EqualsEqualsEqualsToken */:
-                case 33 /* ExclamationEqualsEqualsToken */:
-                    return 6;
-                case 25 /* LessThanToken */:
-                case 27 /* GreaterThanToken */:
-                case 28 /* LessThanEqualsToken */:
-                case 29 /* GreaterThanEqualsToken */:
-                case 91 /* InstanceOfKeyword */:
-                case 90 /* InKeyword */:
-                case 116 /* AsKeyword */:
-                    return 7;
-                case 43 /* LessThanLessThanToken */:
-                case 44 /* GreaterThanGreaterThanToken */:
-                case 45 /* GreaterThanGreaterThanGreaterThanToken */:
-                    return 8;
-                case 35 /* PlusToken */:
-                case 36 /* MinusToken */:
-                    return 9;
-                case 37 /* AsteriskToken */:
-                case 39 /* SlashToken */:
-                case 40 /* PercentToken */:
-                    return 10;
-                case 38 /* AsteriskAsteriskToken */:
-                    return 11;
+            else if (!node.exportClause) {
+                // All export * declarations are collected in an __export symbol
+                declareSymbol(container.symbol.exports, container.symbol, node, 33554432 /* ExportStar */, 0 /* None */);
             }
-            // -1 is lower than all other precedences.  Returning it will cause binary expression
-            // parsing to stop.
-            return -1;
-        }
-        function makeBinaryExpression(left, operatorToken, right) {
-            var node = createNode(187 /* BinaryExpression */, left.pos);
-            node.left = left;
-            node.operatorToken = operatorToken;
-            node.right = right;
-            return finishNode(node);
-        }
-        function makeAsExpression(left, right) {
-            var node = createNode(195 /* AsExpression */, left.pos);
-            node.expression = left;
-            node.type = right;
-            return finishNode(node);
         }
-        function parsePrefixUnaryExpression() {
-            var node = createNode(185 /* PrefixUnaryExpression */);
-            node.operator = token();
-            nextToken();
-            node.operand = parseSimpleUnaryExpression();
-            return finishNode(node);
+        function bindImportClause(node) {
+            if (node.name) {
+                declareSymbolAndAddToSymbolTable(node, 8388608 /* Alias */, 8388608 /* AliasExcludes */);
+            }
         }
-        function parseDeleteExpression() {
-            var node = createNode(181 /* DeleteExpression */);
-            nextToken();
-            node.expression = parseSimpleUnaryExpression();
-            return finishNode(node);
+        function setCommonJsModuleIndicator(node) {
+            if (!file.commonJsModuleIndicator) {
+                file.commonJsModuleIndicator = node;
+                if (!file.externalModuleIndicator) {
+                    bindSourceFileAsExternalModule();
+                }
+            }
         }
-        function parseTypeOfExpression() {
-            var node = createNode(182 /* TypeOfExpression */);
-            nextToken();
-            node.expression = parseSimpleUnaryExpression();
-            return finishNode(node);
+        function bindExportsPropertyAssignment(node) {
+            // When we create a property via 'exports.foo = bar', the 'exports.foo' property access
+            // expression is the declaration
+            setCommonJsModuleIndicator(node);
+            declareSymbol(file.symbol.exports, file.symbol, node.left, 4 /* Property */ | 7340032 /* Export */, 0 /* None */);
         }
-        function parseVoidExpression() {
-            var node = createNode(183 /* VoidExpression */);
-            nextToken();
-            node.expression = parseSimpleUnaryExpression();
-            return finishNode(node);
+        function isExportsOrModuleExportsOrAlias(node) {
+            return ts.isExportsIdentifier(node) ||
+                ts.isModuleExportsPropertyAccessExpression(node) ||
+                isNameOfExportsOrModuleExportsAliasDeclaration(node);
         }
-        function isAwaitExpression() {
-            if (token() === 119 /* AwaitKeyword */) {
-                if (inAwaitContext()) {
-                    return true;
+        function isNameOfExportsOrModuleExportsAliasDeclaration(node) {
+            if (node.kind === 71 /* Identifier */) {
+                var symbol = lookupSymbolForName(node.text);
+                if (symbol && symbol.valueDeclaration && symbol.valueDeclaration.kind === 226 /* VariableDeclaration */) {
+                    var declaration = symbol.valueDeclaration;
+                    if (declaration.initializer) {
+                        return isExportsOrModuleExportsOrAliasOrAssignemnt(declaration.initializer);
+                    }
                 }
-                // here we are using similar heuristics as 'isYieldExpression'
-                return lookAhead(nextTokenIsIdentifierOnSameLine);
             }
             return false;
         }
-        function parseAwaitExpression() {
-            var node = createNode(184 /* AwaitExpression */);
-            nextToken();
-            node.expression = parseSimpleUnaryExpression();
-            return finishNode(node);
+        function isExportsOrModuleExportsOrAliasOrAssignemnt(node) {
+            return isExportsOrModuleExportsOrAlias(node) ||
+                (ts.isAssignmentExpression(node, /*excludeCompoundAssignements*/ true) && (isExportsOrModuleExportsOrAliasOrAssignemnt(node.left) || isExportsOrModuleExportsOrAliasOrAssignemnt(node.right)));
         }
-        /**
-         * Parse ES7 exponential expression and await expression
-         *
-         * ES7 ExponentiationExpression:
-         *      1) UnaryExpression[?Yield]
-         *      2) UpdateExpression[?Yield] ** ExponentiationExpression[?Yield]
-         *
-         */
-        function parseUnaryExpressionOrHigher() {
-            /**
-             * ES7 UpdateExpression:
-             *      1) LeftHandSideExpression[?Yield]
-             *      2) LeftHandSideExpression[?Yield][no LineTerminator here]++
-             *      3) LeftHandSideExpression[?Yield][no LineTerminator here]--
-             *      4) ++UnaryExpression[?Yield]
-             *      5) --UnaryExpression[?Yield]
-             */
-            if (isUpdateExpression()) {
-                var incrementExpression = parseIncrementExpression();
-                return token() === 38 /* AsteriskAsteriskToken */ ?
-                    parseBinaryExpressionRest(getBinaryOperatorPrecedence(), incrementExpression) :
-                    incrementExpression;
-            }
-            /**
-             * ES7 UnaryExpression:
-             *      1) UpdateExpression[?yield]
-             *      2) delete UpdateExpression[?yield]
-             *      3) void UpdateExpression[?yield]
-             *      4) typeof UpdateExpression[?yield]
-             *      5) + UpdateExpression[?yield]
-             *      6) - UpdateExpression[?yield]
-             *      7) ~ UpdateExpression[?yield]
-             *      8) ! UpdateExpression[?yield]
-             */
-            var unaryOperator = token();
-            var simpleUnaryExpression = parseSimpleUnaryExpression();
-            if (token() === 38 /* AsteriskAsteriskToken */) {
-                var start = ts.skipTrivia(sourceText, simpleUnaryExpression.pos);
-                if (simpleUnaryExpression.kind === 177 /* TypeAssertionExpression */) {
-                    parseErrorAtPosition(start, simpleUnaryExpression.end - start, ts.Diagnostics.A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses);
-                }
-                else {
-                    parseErrorAtPosition(start, simpleUnaryExpression.end - start, ts.Diagnostics.An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses, ts.tokenToString(unaryOperator));
-                }
+        function bindModuleExportsAssignment(node) {
+            // A common practice in node modules is to set 'export = module.exports = {}', this ensures that 'exports'
+            // is still pointing to 'module.exports'.
+            // We do not want to consider this as 'export=' since a module can have only one of these.
+            // Similarly we do not want to treat 'module.exports = exports' as an 'export='.
+            var assignedExpression = ts.getRightMostAssignedExpression(node.right);
+            if (ts.isEmptyObjectLiteral(assignedExpression) || isExportsOrModuleExportsOrAlias(assignedExpression)) {
+                // Mark it as a module in case there are no other exports in the file
+                setCommonJsModuleIndicator(node);
+                return;
             }
-            return simpleUnaryExpression;
+            // 'module.exports = expr' assignment
+            setCommonJsModuleIndicator(node);
+            declareSymbol(file.symbol.exports, file.symbol, node, 4 /* Property */ | 7340032 /* Export */ | 512 /* ValueModule */, 0 /* None */);
         }
-        /**
-         * Parse ES7 simple-unary expression or higher:
-         *
-         * ES7 UnaryExpression:
-         *      1) UpdateExpression[?yield]
-         *      2) delete UnaryExpression[?yield]
-         *      3) void UnaryExpression[?yield]
-         *      4) typeof UnaryExpression[?yield]
-         *      5) + UnaryExpression[?yield]
-         *      6) - UnaryExpression[?yield]
-         *      7) ~ UnaryExpression[?yield]
-         *      8) ! UnaryExpression[?yield]
-         *      9) [+Await] await UnaryExpression[?yield]
-         */
-        function parseSimpleUnaryExpression() {
-            switch (token()) {
-                case 35 /* PlusToken */:
-                case 36 /* MinusToken */:
-                case 50 /* TildeToken */:
-                case 49 /* ExclamationToken */:
-                    return parsePrefixUnaryExpression();
-                case 78 /* DeleteKeyword */:
-                    return parseDeleteExpression();
-                case 101 /* TypeOfKeyword */:
-                    return parseTypeOfExpression();
-                case 103 /* VoidKeyword */:
-                    return parseVoidExpression();
-                case 25 /* LessThanToken */:
-                    // This is modified UnaryExpression grammar in TypeScript
-                    //  UnaryExpression (modified):
-                    //      < type > UnaryExpression
-                    return parseTypeAssertion();
-                case 119 /* AwaitKeyword */:
-                    if (isAwaitExpression()) {
-                        return parseAwaitExpression();
+        function bindThisPropertyAssignment(node) {
+            ts.Debug.assert(ts.isInJavaScriptFile(node));
+            var container = ts.getThisContainer(node, /*includeArrowFunctions*/ false);
+            switch (container.kind) {
+                case 228 /* FunctionDeclaration */:
+                case 186 /* FunctionExpression */:
+                    // Declare a 'member' if the container is an ES5 class or ES6 constructor
+                    container.symbol.members = container.symbol.members || ts.createMap();
+                    // It's acceptable for multiple 'this' assignments of the same identifier to occur
+                    declareSymbol(container.symbol.members, container.symbol, node, 4 /* Property */, 0 /* PropertyExcludes */ & ~4 /* Property */);
+                    break;
+                case 152 /* Constructor */:
+                case 149 /* PropertyDeclaration */:
+                case 151 /* MethodDeclaration */:
+                case 153 /* GetAccessor */:
+                case 154 /* SetAccessor */:
+                    // this.foo assignment in a JavaScript class
+                    // Bind this property to the containing class
+                    var containingClass = container.parent;
+                    var symbol = declareSymbol(ts.hasModifier(container, 32 /* Static */) ? containingClass.symbol.exports : containingClass.symbol.members, containingClass.symbol, node, 4 /* Property */, 0 /* None */);
+                    if (symbol) {
+                        // symbols declared through 'this' property assignements can be overwritten by subsequent method declarations
+                        symbol.isReplaceableByMethod = true;
                     }
-                default:
-                    return parseIncrementExpression();
+                    break;
             }
         }
-        /**
-         * Check if the current token can possibly be an ES7 increment expression.
-         *
-         * ES7 UpdateExpression:
-         *      LeftHandSideExpression[?Yield]
-         *      LeftHandSideExpression[?Yield][no LineTerminator here]++
-         *      LeftHandSideExpression[?Yield][no LineTerminator here]--
-         *      ++LeftHandSideExpression[?Yield]
-         *      --LeftHandSideExpression[?Yield]
-         */
-        function isUpdateExpression() {
-            // This function is called inside parseUnaryExpression to decide
-            // whether to call parseSimpleUnaryExpression or call parseIncrementExpression directly
-            switch (token()) {
-                case 35 /* PlusToken */:
-                case 36 /* MinusToken */:
-                case 50 /* TildeToken */:
-                case 49 /* ExclamationToken */:
-                case 78 /* DeleteKeyword */:
-                case 101 /* TypeOfKeyword */:
-                case 103 /* VoidKeyword */:
-                case 119 /* AwaitKeyword */:
-                    return false;
-                case 25 /* LessThanToken */:
-                    // If we are not in JSX context, we are parsing TypeAssertion which is an UnaryExpression
-                    if (sourceFile.languageVariant !== 1 /* JSX */) {
-                        return false;
-                    }
-                // We are in JSX context and the token is part of JSXElement.
-                // Fall through
-                default:
-                    return true;
-            }
+        function bindPrototypePropertyAssignment(node) {
+            // We saw a node of the form 'x.prototype.y = z'. Declare a 'member' y on x if x was a function.
+            // Look up the function in the local scope, since prototype assignments should
+            // follow the function declaration
+            var leftSideOfAssignment = node.left;
+            var classPrototype = leftSideOfAssignment.expression;
+            var constructorFunction = classPrototype.expression;
+            // Fix up parent pointers since we're going to use these nodes before we bind into them
+            leftSideOfAssignment.parent = node;
+            constructorFunction.parent = classPrototype;
+            classPrototype.parent = leftSideOfAssignment;
+            bindPropertyAssignment(constructorFunction.text, leftSideOfAssignment, /*isPrototypeProperty*/ true);
         }
-        /**
-         * Parse ES7 IncrementExpression. IncrementExpression is used instead of ES6's PostFixExpression.
-         *
-         * ES7 IncrementExpression[yield]:
-         *      1) LeftHandSideExpression[?yield]
-         *      2) LeftHandSideExpression[?yield] [[no LineTerminator here]]++
-         *      3) LeftHandSideExpression[?yield] [[no LineTerminator here]]--
-         *      4) ++LeftHandSideExpression[?yield]
-         *      5) --LeftHandSideExpression[?yield]
-         * In TypeScript (2), (3) are parsed as PostfixUnaryExpression. (4), (5) are parsed as PrefixUnaryExpression
-         */
-        function parseIncrementExpression() {
-            if (token() === 41 /* PlusPlusToken */ || token() === 42 /* MinusMinusToken */) {
-                var node = createNode(185 /* PrefixUnaryExpression */);
-                node.operator = token();
-                nextToken();
-                node.operand = parseLeftHandSideExpressionOrHigher();
-                return finishNode(node);
-            }
-            else if (sourceFile.languageVariant === 1 /* JSX */ && token() === 25 /* LessThanToken */ && lookAhead(nextTokenIsIdentifierOrKeyword)) {
-                // JSXElement is part of primaryExpression
-                return parseJsxElementOrSelfClosingElement(/*inExpressionContext*/ true);
+        function bindStaticPropertyAssignment(node) {
+            // We saw a node of the form 'x.y = z'. Declare a 'member' y on x if x was a function.
+            // Look up the function in the local scope, since prototype assignments should
+            // follow the function declaration
+            var leftSideOfAssignment = node.left;
+            var target = leftSideOfAssignment.expression;
+            // Fix up parent pointers since we're going to use these nodes before we bind into them
+            leftSideOfAssignment.parent = node;
+            target.parent = leftSideOfAssignment;
+            if (isNameOfExportsOrModuleExportsAliasDeclaration(target)) {
+                // This can be an alias for the 'exports' or 'module.exports' names, e.g.
+                //    var util = module.exports;
+                //    util.property = function ...
+                bindExportsPropertyAssignment(node);
             }
-            var expression = parseLeftHandSideExpressionOrHigher();
-            ts.Debug.assert(ts.isLeftHandSideExpression(expression));
-            if ((token() === 41 /* PlusPlusToken */ || token() === 42 /* MinusMinusToken */) && !scanner.hasPrecedingLineBreak()) {
-                var node = createNode(186 /* PostfixUnaryExpression */, expression.pos);
-                node.operand = expression;
-                node.operator = token();
-                nextToken();
-                return finishNode(node);
+            else {
+                bindPropertyAssignment(target.text, leftSideOfAssignment, /*isPrototypeProperty*/ false);
             }
-            return expression;
-        }
-        function parseLeftHandSideExpressionOrHigher() {
-            // Original Ecma:
-            // LeftHandSideExpression: See 11.2
-            //      NewExpression
-            //      CallExpression
-            //
-            // Our simplification:
-            //
-            // LeftHandSideExpression: See 11.2
-            //      MemberExpression
-            //      CallExpression
-            //
-            // See comment in parseMemberExpressionOrHigher on how we replaced NewExpression with
-            // MemberExpression to make our lives easier.
-            //
-            // to best understand the below code, it's important to see how CallExpression expands
-            // out into its own productions:
-            //
-            // CallExpression:
-            //      MemberExpression Arguments
-            //      CallExpression Arguments
-            //      CallExpression[Expression]
-            //      CallExpression.IdentifierName
-            //      super   (   ArgumentListopt   )
-            //      super.IdentifierName
-            //
-            // Because of the recursion in these calls, we need to bottom out first.  There are two
-            // bottom out states we can run into.  Either we see 'super' which must start either of
-            // the last two CallExpression productions.  Or we have a MemberExpression which either
-            // completes the LeftHandSideExpression, or starts the beginning of the first four
-            // CallExpression productions.
-            var expression = token() === 95 /* SuperKeyword */
-                ? parseSuperExpression()
-                : parseMemberExpressionOrHigher();
-            // Now, we *may* be complete.  However, we might have consumed the start of a
-            // CallExpression.  As such, we need to consume the rest of it here to be complete.
-            return parseCallExpressionRest(expression);
-        }
-        function parseMemberExpressionOrHigher() {
-            // Note: to make our lives simpler, we decompose the the NewExpression productions and
-            // place ObjectCreationExpression and FunctionExpression into PrimaryExpression.
-            // like so:
-            //
-            //   PrimaryExpression : See 11.1
-            //      this
-            //      Identifier
-            //      Literal
-            //      ArrayLiteral
-            //      ObjectLiteral
-            //      (Expression)
-            //      FunctionExpression
-            //      new MemberExpression Arguments?
-            //
-            //   MemberExpression : See 11.2
-            //      PrimaryExpression
-            //      MemberExpression[Expression]
-            //      MemberExpression.IdentifierName
-            //
-            //   CallExpression : See 11.2
-            //      MemberExpression
-            //      CallExpression Arguments
-            //      CallExpression[Expression]
-            //      CallExpression.IdentifierName
-            //
-            // Technically this is ambiguous.  i.e. CallExpression defines:
-            //
-            //   CallExpression:
-            //      CallExpression Arguments
-            //
-            // If you see: "new Foo()"
-            //
-            // Then that could be treated as a single ObjectCreationExpression, or it could be
-            // treated as the invocation of "new Foo".  We disambiguate that in code (to match
-            // the original grammar) by making sure that if we see an ObjectCreationExpression
-            // we always consume arguments if they are there. So we treat "new Foo()" as an
-            // object creation only, and not at all as an invocation)  Another way to think
-            // about this is that for every "new" that we see, we will consume an argument list if
-            // it is there as part of the *associated* object creation node.  Any additional
-            // argument lists we see, will become invocation expressions.
-            //
-            // Because there are no other places in the grammar now that refer to FunctionExpression
-            // or ObjectCreationExpression, it is safe to push down into the PrimaryExpression
-            // production.
-            //
-            // Because CallExpression and MemberExpression are left recursive, we need to bottom out
-            // of the recursion immediately.  So we parse out a primary expression to start with.
-            var expression = parsePrimaryExpression();
-            return parseMemberExpressionRest(expression);
         }
-        function parseSuperExpression() {
-            var expression = parseTokenNode();
-            if (token() === 17 /* OpenParenToken */ || token() === 21 /* DotToken */ || token() === 19 /* OpenBracketToken */) {
-                return expression;
-            }
-            // If we have seen "super" it must be followed by '(' or '.'.
-            // If it wasn't then just try to parse out a '.' and report an error.
-            var node = createNode(172 /* PropertyAccessExpression */, expression.pos);
-            node.expression = expression;
-            parseExpectedToken(21 /* DotToken */, /*reportAtCurrentPosition*/ false, ts.Diagnostics.super_must_be_followed_by_an_argument_list_or_member_access);
-            node.name = parseRightSideOfDot(/*allowIdentifierNames*/ true);
-            return finishNode(node);
+        function lookupSymbolForName(name) {
+            return (container.symbol && container.symbol.exports && container.symbol.exports.get(name)) || (container.locals && container.locals.get(name));
         }
-        function tagNamesAreEquivalent(lhs, rhs) {
-            if (lhs.kind !== rhs.kind) {
-                return false;
+        function bindPropertyAssignment(functionName, propertyAccessExpression, isPrototypeProperty) {
+            var targetSymbol = lookupSymbolForName(functionName);
+            if (targetSymbol && ts.isDeclarationOfFunctionOrClassExpression(targetSymbol)) {
+                targetSymbol = targetSymbol.valueDeclaration.initializer.symbol;
             }
-            if (lhs.kind === 69 /* Identifier */) {
-                return lhs.text === rhs.text;
+            if (!targetSymbol || !(targetSymbol.flags & (16 /* Function */ | 32 /* Class */))) {
+                return;
             }
-            if (lhs.kind === 97 /* ThisKeyword */) {
-                return true;
+            // Set up the members collection if it doesn't exist already
+            var symbolTable = isPrototypeProperty ?
+                (targetSymbol.members || (targetSymbol.members = ts.createMap())) :
+                (targetSymbol.exports || (targetSymbol.exports = ts.createMap()));
+            // Declare the method/property
+            declareSymbol(symbolTable, targetSymbol, propertyAccessExpression, 4 /* Property */, 0 /* PropertyExcludes */);
+        }
+        function bindCallExpression(node) {
+            // We're only inspecting call expressions to detect CommonJS modules, so we can skip
+            // this check if we've already seen the module indicator
+            if (!file.commonJsModuleIndicator && ts.isRequireCall(node, /*checkArgumentIsStringLiteral*/ false)) {
+                setCommonJsModuleIndicator(node);
             }
-            // If we are at this statement then we must have PropertyAccessExpression and because tag name in Jsx element can only
-            // take forms of JsxTagNameExpression which includes an identifier, "this" expression, or another propertyAccessExpression
-            // it is safe to case the expression property as such. See parseJsxElementName for how we parse tag name in Jsx element
-            return lhs.name.text === rhs.name.text &&
-                tagNamesAreEquivalent(lhs.expression, rhs.expression);
         }
-        function parseJsxElementOrSelfClosingElement(inExpressionContext) {
-            var opening = parseJsxOpeningOrSelfClosingElement(inExpressionContext);
-            var result;
-            if (opening.kind === 243 /* JsxOpeningElement */) {
-                var node = createNode(241 /* JsxElement */, opening.pos);
-                node.openingElement = opening;
-                node.children = parseJsxChildren(node.openingElement.tagName);
-                node.closingElement = parseJsxClosingElement(inExpressionContext);
-                if (!tagNamesAreEquivalent(node.openingElement.tagName, node.closingElement.tagName)) {
-                    parseErrorAtPosition(node.closingElement.pos, node.closingElement.end - node.closingElement.pos, ts.Diagnostics.Expected_corresponding_JSX_closing_tag_for_0, ts.getTextOfNodeFromSourceText(sourceText, node.openingElement.tagName));
-                }
-                result = finishNode(node);
+        function bindClassLikeDeclaration(node) {
+            if (node.kind === 229 /* ClassDeclaration */) {
+                bindBlockScopedDeclaration(node, 32 /* Class */, 899519 /* ClassExcludes */);
             }
             else {
-                ts.Debug.assert(opening.kind === 242 /* JsxSelfClosingElement */);
-                // Nothing else to do for self-closing elements
-                result = opening;
-            }
-            // If the user writes the invalid code '<div></div><div></div>' in an expression context (i.e. not wrapped in
-            // an enclosing tag), we'll naively try to parse   ^ this as a 'less than' operator and the remainder of the tag
-            // as garbage, which will cause the formatter to badly mangle the JSX. Perform a speculative parse of a JSX
-            // element if we see a < token so that we can wrap it in a synthetic binary expression so the formatter
-            // does less damage and we can report a better error.
-            // Since JSX elements are invalid < operands anyway, this lookahead parse will only occur in error scenarios
-            // of one sort or another.
-            if (inExpressionContext && token() === 25 /* LessThanToken */) {
-                var invalidElement = tryParse(function () { return parseJsxElementOrSelfClosingElement(/*inExpressionContext*/ true); });
-                if (invalidElement) {
-                    parseErrorAtCurrentToken(ts.Diagnostics.JSX_expressions_must_have_one_parent_element);
-                    var badNode = createNode(187 /* BinaryExpression */, result.pos);
-                    badNode.end = invalidElement.end;
-                    badNode.left = result;
-                    badNode.right = invalidElement;
-                    badNode.operatorToken = createMissingNode(24 /* CommaToken */, /*reportAtCurrentPosition*/ false, /*diagnosticMessage*/ undefined);
-                    badNode.operatorToken.pos = badNode.operatorToken.end = badNode.right.pos;
-                    return badNode;
+                var bindingName = node.name ? node.name.text : "__class";
+                bindAnonymousDeclaration(node, 32 /* Class */, bindingName);
+                // Add name of class expression into the map for semantic classifier
+                if (node.name) {
+                    classifiableNames.set(node.name.text, node.name.text);
                 }
             }
-            return result;
-        }
-        function parseJsxText() {
-            var node = createNode(244 /* JsxText */, scanner.getStartPos());
-            currentToken = scanner.scanJsxToken();
-            return finishNode(node);
-        }
-        function parseJsxChild() {
-            switch (token()) {
-                case 244 /* JsxText */:
-                    return parseJsxText();
-                case 15 /* OpenBraceToken */:
-                    return parseJsxExpression(/*inExpressionContext*/ false);
-                case 25 /* LessThanToken */:
-                    return parseJsxElementOrSelfClosingElement(/*inExpressionContext*/ false);
-            }
-            ts.Debug.fail("Unknown JSX child kind " + token());
-        }
-        function parseJsxChildren(openingTagName) {
-            var result = createNodeArray();
-            var saveParsingContext = parsingContext;
-            parsingContext |= 1 << 14 /* JsxChildren */;
-            while (true) {
-                currentToken = scanner.reScanJsxToken();
-                if (token() === 26 /* LessThanSlashToken */) {
-                    // Closing tag
-                    break;
-                }
-                else if (token() === 1 /* EndOfFileToken */) {
-                    // If we hit EOF, issue the error at the tag that lacks the closing element
-                    // rather than at the end of the file (which is useless)
-                    parseErrorAtPosition(openingTagName.pos, openingTagName.end - openingTagName.pos, ts.Diagnostics.JSX_element_0_has_no_corresponding_closing_tag, ts.getTextOfNodeFromSourceText(sourceText, openingTagName));
-                    break;
+            var symbol = node.symbol;
+            // TypeScript 1.0 spec (April 2014): 8.4
+            // Every class automatically contains a static property member named 'prototype', the
+            // type of which is an instantiation of the class type with type Any supplied as a type
+            // argument for each type parameter. It is an error to explicitly declare a static
+            // property member with the name 'prototype'.
+            //
+            // Note: we check for this here because this class may be merging into a module.  The
+            // module might have an exported variable called 'prototype'.  We can't allow that as
+            // that would clash with the built-in 'prototype' for the class.
+            var prototypeSymbol = createSymbol(4 /* Property */ | 16777216 /* Prototype */, "prototype");
+            var symbolExport = symbol.exports.get(prototypeSymbol.name);
+            if (symbolExport) {
+                if (node.name) {
+                    node.name.parent = node;
                 }
-                result.push(parseJsxChild());
+                file.bindDiagnostics.push(ts.createDiagnosticForNode(symbolExport.declarations[0], ts.Diagnostics.Duplicate_identifier_0, prototypeSymbol.name));
             }
-            result.end = scanner.getTokenPos();
-            parsingContext = saveParsingContext;
-            return result;
+            symbol.exports.set(prototypeSymbol.name, prototypeSymbol);
+            prototypeSymbol.parent = symbol;
+        }
+        function bindEnumDeclaration(node) {
+            return ts.isConst(node)
+                ? bindBlockScopedDeclaration(node, 128 /* ConstEnum */, 899967 /* ConstEnumExcludes */)
+                : bindBlockScopedDeclaration(node, 256 /* RegularEnum */, 899327 /* RegularEnumExcludes */);
         }
-        function parseJsxOpeningOrSelfClosingElement(inExpressionContext) {
-            var fullStart = scanner.getStartPos();
-            parseExpected(25 /* LessThanToken */);
-            var tagName = parseJsxElementName();
-            var attributes = parseList(13 /* JsxAttributes */, parseJsxAttribute);
-            var node;
-            if (token() === 27 /* GreaterThanToken */) {
-                // Closing tag, so scan the immediately-following text with the JSX scanning instead
-                // of regular scanning to avoid treating illegal characters (e.g. '#') as immediate
-                // scanning errors
-                node = createNode(243 /* JsxOpeningElement */, fullStart);
-                scanJsxText();
+        function bindVariableDeclarationOrBindingElement(node) {
+            if (inStrictMode) {
+                checkStrictModeEvalOrArguments(node, node.name);
             }
-            else {
-                parseExpected(39 /* SlashToken */);
-                if (inExpressionContext) {
-                    parseExpected(27 /* GreaterThanToken */);
+            if (!ts.isBindingPattern(node.name)) {
+                if (ts.isBlockOrCatchScoped(node)) {
+                    bindBlockScopedVariableDeclaration(node);
+                }
+                else if (ts.isParameterDeclaration(node)) {
+                    // It is safe to walk up parent chain to find whether the node is a destructing parameter declaration
+                    // because its parent chain has already been set up, since parents are set before descending into children.
+                    //
+                    // If node is a binding element in parameter declaration, we need to use ParameterExcludes.
+                    // Using ParameterExcludes flag allows the compiler to report an error on duplicate identifiers in Parameter Declaration
+                    // For example:
+                    //      function foo([a,a]) {} // Duplicate Identifier error
+                    //      function bar(a,a) {}   // Duplicate Identifier error, parameter declaration in this case is handled in bindParameter
+                    //                             // which correctly set excluded symbols
+                    declareSymbolAndAddToSymbolTable(node, 1 /* FunctionScopedVariable */, 107455 /* ParameterExcludes */);
                 }
                 else {
-                    parseExpected(27 /* GreaterThanToken */, /*diagnostic*/ undefined, /*shouldAdvance*/ false);
-                    scanJsxText();
+                    declareSymbolAndAddToSymbolTable(node, 1 /* FunctionScopedVariable */, 107454 /* FunctionScopedVariableExcludes */);
                 }
-                node = createNode(242 /* JsxSelfClosingElement */, fullStart);
             }
-            node.tagName = tagName;
-            node.attributes = attributes;
-            return finishNode(node);
         }
-        function parseJsxElementName() {
-            scanJsxIdentifier();
-            // JsxElement can have name in the form of
-            //      propertyAccessExpression
-            //      primaryExpression in the form of an identifier and "this" keyword
-            // We can't just simply use parseLeftHandSideExpressionOrHigher because then we will start consider class,function etc as a keyword
-            // We only want to consider "this" as a primaryExpression
-            var expression = token() === 97 /* ThisKeyword */ ?
-                parseTokenNode() : parseIdentifierName();
-            while (parseOptional(21 /* DotToken */)) {
-                var propertyAccess = createNode(172 /* PropertyAccessExpression */, expression.pos);
-                propertyAccess.expression = expression;
-                propertyAccess.name = parseRightSideOfDot(/*allowIdentifierNames*/ true);
-                expression = finishNode(propertyAccess);
+        function bindParameter(node) {
+            if (inStrictMode && !ts.isInAmbientContext(node)) {
+                // It is a SyntaxError if the identifier eval or arguments appears within a FormalParameterList of a
+                // strict mode FunctionLikeDeclaration or FunctionExpression(13.1)
+                checkStrictModeEvalOrArguments(node, node.name);
+            }
+            if (ts.isBindingPattern(node.name)) {
+                bindAnonymousDeclaration(node, 1 /* FunctionScopedVariable */, getDestructuringParameterName(node));
+            }
+            else {
+                declareSymbolAndAddToSymbolTable(node, 1 /* FunctionScopedVariable */, 107455 /* ParameterExcludes */);
+            }
+            // If this is a property-parameter, then also declare the property symbol into the
+            // containing class.
+            if (ts.isParameterPropertyDeclaration(node)) {
+                var classDeclaration = node.parent.parent;
+                declareSymbol(classDeclaration.symbol.members, classDeclaration.symbol, node, 4 /* Property */ | (node.questionToken ? 67108864 /* Optional */ : 0 /* None */), 0 /* PropertyExcludes */);
             }
-            return expression;
         }
-        function parseJsxExpression(inExpressionContext) {
-            var node = createNode(248 /* JsxExpression */);
-            parseExpected(15 /* OpenBraceToken */);
-            if (token() !== 16 /* CloseBraceToken */) {
-                node.expression = parseAssignmentExpressionOrHigher();
+        function bindFunctionDeclaration(node) {
+            if (!file.isDeclarationFile && !ts.isInAmbientContext(node)) {
+                if (ts.isAsyncFunction(node)) {
+                    emitFlags |= 1024 /* HasAsyncFunctions */;
+                }
             }
-            if (inExpressionContext) {
-                parseExpected(16 /* CloseBraceToken */);
+            checkStrictModeFunctionName(node);
+            if (inStrictMode) {
+                checkStrictModeFunctionDeclaration(node);
+                bindBlockScopedDeclaration(node, 16 /* Function */, 106927 /* FunctionExcludes */);
             }
             else {
-                parseExpected(16 /* CloseBraceToken */, /*message*/ undefined, /*shouldAdvance*/ false);
-                scanJsxText();
+                declareSymbolAndAddToSymbolTable(node, 16 /* Function */, 106927 /* FunctionExcludes */);
             }
-            return finishNode(node);
         }
-        function parseJsxAttribute() {
-            if (token() === 15 /* OpenBraceToken */) {
-                return parseJsxSpreadAttribute();
-            }
-            scanJsxIdentifier();
-            var node = createNode(246 /* JsxAttribute */);
-            node.name = parseIdentifierName();
-            if (token() === 56 /* EqualsToken */) {
-                switch (scanJsxAttributeValue()) {
-                    case 9 /* StringLiteral */:
-                        node.initializer = parseLiteralNode();
-                        break;
-                    default:
-                        node.initializer = parseJsxExpression(/*inExpressionContext*/ true);
-                        break;
+        function bindFunctionExpression(node) {
+            if (!file.isDeclarationFile && !ts.isInAmbientContext(node)) {
+                if (ts.isAsyncFunction(node)) {
+                    emitFlags |= 1024 /* HasAsyncFunctions */;
                 }
             }
-            return finishNode(node);
-        }
-        function parseJsxSpreadAttribute() {
-            var node = createNode(247 /* JsxSpreadAttribute */);
-            parseExpected(15 /* OpenBraceToken */);
-            parseExpected(22 /* DotDotDotToken */);
-            node.expression = parseExpression();
-            parseExpected(16 /* CloseBraceToken */);
-            return finishNode(node);
+            if (currentFlow) {
+                node.flowNode = currentFlow;
+            }
+            checkStrictModeFunctionName(node);
+            var bindingName = node.name ? node.name.text : "__function";
+            return bindAnonymousDeclaration(node, 16 /* Function */, bindingName);
         }
-        function parseJsxClosingElement(inExpressionContext) {
-            var node = createNode(245 /* JsxClosingElement */);
-            parseExpected(26 /* LessThanSlashToken */);
-            node.tagName = parseJsxElementName();
-            if (inExpressionContext) {
-                parseExpected(27 /* GreaterThanToken */);
+        function bindPropertyOrMethodOrAccessor(node, symbolFlags, symbolExcludes) {
+            if (!file.isDeclarationFile && !ts.isInAmbientContext(node) && ts.isAsyncFunction(node)) {
+                emitFlags |= 1024 /* HasAsyncFunctions */;
             }
-            else {
-                parseExpected(27 /* GreaterThanToken */, /*diagnostic*/ undefined, /*shouldAdvance*/ false);
-                scanJsxText();
+            if (currentFlow && ts.isObjectLiteralOrClassExpressionMethod(node)) {
+                node.flowNode = currentFlow;
             }
-            return finishNode(node);
+            return ts.hasDynamicName(node)
+                ? bindAnonymousDeclaration(node, symbolFlags, "__computed")
+                : declareSymbolAndAddToSymbolTable(node, symbolFlags, symbolExcludes);
         }
-        function parseTypeAssertion() {
-            var node = createNode(177 /* TypeAssertionExpression */);
-            parseExpected(25 /* LessThanToken */);
-            node.type = parseType();
-            parseExpected(27 /* GreaterThanToken */);
-            node.expression = parseSimpleUnaryExpression();
-            return finishNode(node);
+        // reachability checks
+        function shouldReportErrorOnModuleDeclaration(node) {
+            var instanceState = getModuleInstanceState(node);
+            return instanceState === 1 /* Instantiated */ || (instanceState === 2 /* ConstEnumOnly */ && options.preserveConstEnums);
         }
-        function parseMemberExpressionRest(expression) {
-            while (true) {
-                var dotToken = parseOptionalToken(21 /* DotToken */);
-                if (dotToken) {
-                    var propertyAccess = createNode(172 /* PropertyAccessExpression */, expression.pos);
-                    propertyAccess.expression = expression;
-                    propertyAccess.name = parseRightSideOfDot(/*allowIdentifierNames*/ true);
-                    expression = finishNode(propertyAccess);
-                    continue;
-                }
-                if (token() === 49 /* ExclamationToken */ && !scanner.hasPrecedingLineBreak()) {
-                    nextToken();
-                    var nonNullExpression = createNode(196 /* NonNullExpression */, expression.pos);
-                    nonNullExpression.expression = expression;
-                    expression = finishNode(nonNullExpression);
-                    continue;
-                }
-                // when in the [Decorator] context, we do not parse ElementAccess as it could be part of a ComputedPropertyName
-                if (!inDecoratorContext() && parseOptional(19 /* OpenBracketToken */)) {
-                    var indexedAccess = createNode(173 /* ElementAccessExpression */, expression.pos);
-                    indexedAccess.expression = expression;
-                    // It's not uncommon for a user to write: "new Type[]".
-                    // Check for that common pattern and report a better error message.
-                    if (token() !== 20 /* CloseBracketToken */) {
-                        indexedAccess.argumentExpression = allowInAnd(parseExpression);
-                        if (indexedAccess.argumentExpression.kind === 9 /* StringLiteral */ || indexedAccess.argumentExpression.kind === 8 /* NumericLiteral */) {
-                            var literal = indexedAccess.argumentExpression;
-                            literal.text = internIdentifier(literal.text);
-                        }
-                    }
-                    parseExpected(20 /* CloseBracketToken */);
-                    expression = finishNode(indexedAccess);
-                    continue;
-                }
-                if (token() === 11 /* NoSubstitutionTemplateLiteral */ || token() === 12 /* TemplateHead */) {
-                    var tagExpression = createNode(176 /* TaggedTemplateExpression */, expression.pos);
-                    tagExpression.tag = expression;
-                    tagExpression.template = token() === 11 /* NoSubstitutionTemplateLiteral */
-                        ? parseLiteralNode()
-                        : parseTemplateExpression();
-                    expression = finishNode(tagExpression);
-                    continue;
-                }
-                return expression;
+        function checkUnreachable(node) {
+            if (!(currentFlow.flags & 1 /* Unreachable */)) {
+                return false;
             }
-        }
-        function parseCallExpressionRest(expression) {
-            while (true) {
-                expression = parseMemberExpressionRest(expression);
-                if (token() === 25 /* LessThanToken */) {
-                    // See if this is the start of a generic invocation.  If so, consume it and
-                    // keep checking for postfix expressions.  Otherwise, it's just a '<' that's
-                    // part of an arithmetic expression.  Break out so we consume it higher in the
-                    // stack.
-                    var typeArguments = tryParse(parseTypeArgumentsInExpression);
-                    if (!typeArguments) {
-                        return expression;
+            if (currentFlow === unreachableFlow) {
+                var reportError = 
+                // report error on all statements except empty ones
+                (ts.isStatementButNotDeclaration(node) && node.kind !== 209 /* EmptyStatement */) ||
+                    // report error on class declarations
+                    node.kind === 229 /* ClassDeclaration */ ||
+                    // report error on instantiated modules or const-enums only modules if preserveConstEnums is set
+                    (node.kind === 233 /* ModuleDeclaration */ && shouldReportErrorOnModuleDeclaration(node)) ||
+                    // report error on regular enums and const enums if preserveConstEnums is set
+                    (node.kind === 232 /* EnumDeclaration */ && (!ts.isConstEnumDeclaration(node) || options.preserveConstEnums));
+                if (reportError) {
+                    currentFlow = reportedUnreachableFlow;
+                    // unreachable code is reported if
+                    // - user has explicitly asked about it AND
+                    // - statement is in not ambient context (statements in ambient context is already an error
+                    //   so we should not report extras) AND
+                    //   - node is not variable statement OR
+                    //   - node is block scoped variable statement OR
+                    //   - node is not block scoped variable statement and at least one variable declaration has initializer
+                    //   Rationale: we don't want to report errors on non-initialized var's since they are hoisted
+                    //   On the other side we do want to report errors on non-initialized 'lets' because of TDZ
+                    var reportUnreachableCode = !options.allowUnreachableCode &&
+                        !ts.isInAmbientContext(node) &&
+                        (node.kind !== 208 /* VariableStatement */ ||
+                            ts.getCombinedNodeFlags(node.declarationList) & 3 /* BlockScoped */ ||
+                            ts.forEach(node.declarationList.declarations, function (d) { return d.initializer; }));
+                    if (reportUnreachableCode) {
+                        errorOnFirstToken(node, ts.Diagnostics.Unreachable_code_detected);
                     }
-                    var callExpr = createNode(174 /* CallExpression */, expression.pos);
-                    callExpr.expression = expression;
-                    callExpr.typeArguments = typeArguments;
-                    callExpr.arguments = parseArgumentList();
-                    expression = finishNode(callExpr);
-                    continue;
                 }
-                else if (token() === 17 /* OpenParenToken */) {
-                    var callExpr = createNode(174 /* CallExpression */, expression.pos);
-                    callExpr.expression = expression;
-                    callExpr.arguments = parseArgumentList();
-                    expression = finishNode(callExpr);
-                    continue;
-                }
-                return expression;
             }
+            return true;
         }
-        function parseArgumentList() {
-            parseExpected(17 /* OpenParenToken */);
-            var result = parseDelimitedList(11 /* ArgumentExpressions */, parseArgumentExpression);
-            parseExpected(18 /* CloseParenToken */);
-            return result;
+    }
+    /**
+     * Computes the transform flags for a node, given the transform flags of its subtree
+     *
+     * @param node The node to analyze
+     * @param subtreeFlags Transform flags computed for this node's subtree
+     */
+    function computeTransformFlagsForNode(node, subtreeFlags) {
+        var kind = node.kind;
+        switch (kind) {
+            case 181 /* CallExpression */:
+                return computeCallExpression(node, subtreeFlags);
+            case 182 /* NewExpression */:
+                return computeNewExpression(node, subtreeFlags);
+            case 233 /* ModuleDeclaration */:
+                return computeModuleDeclaration(node, subtreeFlags);
+            case 185 /* ParenthesizedExpression */:
+                return computeParenthesizedExpression(node, subtreeFlags);
+            case 194 /* BinaryExpression */:
+                return computeBinaryExpression(node, subtreeFlags);
+            case 210 /* ExpressionStatement */:
+                return computeExpressionStatement(node, subtreeFlags);
+            case 146 /* Parameter */:
+                return computeParameter(node, subtreeFlags);
+            case 187 /* ArrowFunction */:
+                return computeArrowFunction(node, subtreeFlags);
+            case 186 /* FunctionExpression */:
+                return computeFunctionExpression(node, subtreeFlags);
+            case 228 /* FunctionDeclaration */:
+                return computeFunctionDeclaration(node, subtreeFlags);
+            case 226 /* VariableDeclaration */:
+                return computeVariableDeclaration(node, subtreeFlags);
+            case 227 /* VariableDeclarationList */:
+                return computeVariableDeclarationList(node, subtreeFlags);
+            case 208 /* VariableStatement */:
+                return computeVariableStatement(node, subtreeFlags);
+            case 222 /* LabeledStatement */:
+                return computeLabeledStatement(node, subtreeFlags);
+            case 229 /* ClassDeclaration */:
+                return computeClassDeclaration(node, subtreeFlags);
+            case 199 /* ClassExpression */:
+                return computeClassExpression(node, subtreeFlags);
+            case 259 /* HeritageClause */:
+                return computeHeritageClause(node, subtreeFlags);
+            case 260 /* CatchClause */:
+                return computeCatchClause(node, subtreeFlags);
+            case 201 /* ExpressionWithTypeArguments */:
+                return computeExpressionWithTypeArguments(node, subtreeFlags);
+            case 152 /* Constructor */:
+                return computeConstructor(node, subtreeFlags);
+            case 149 /* PropertyDeclaration */:
+                return computePropertyDeclaration(node, subtreeFlags);
+            case 151 /* MethodDeclaration */:
+                return computeMethod(node, subtreeFlags);
+            case 153 /* GetAccessor */:
+            case 154 /* SetAccessor */:
+                return computeAccessor(node, subtreeFlags);
+            case 237 /* ImportEqualsDeclaration */:
+                return computeImportEquals(node, subtreeFlags);
+            case 179 /* PropertyAccessExpression */:
+                return computePropertyAccess(node, subtreeFlags);
+            default:
+                return computeOther(node, kind, subtreeFlags);
         }
-        function parseTypeArgumentsInExpression() {
-            if (!parseOptional(25 /* LessThanToken */)) {
-                return undefined;
-            }
-            var typeArguments = parseDelimitedList(18 /* TypeArguments */, parseType);
-            if (!parseExpected(27 /* GreaterThanToken */)) {
-                // If it doesn't have the closing >  then it's definitely not an type argument list.
-                return undefined;
-            }
-            // If we have a '<', then only parse this as a argument list if the type arguments
-            // are complete and we have an open paren.  if we don't, rewind and return nothing.
-            return typeArguments && canFollowTypeArgumentsInExpression()
-                ? typeArguments
-                : undefined;
+    }
+    ts.computeTransformFlagsForNode = computeTransformFlagsForNode;
+    function computeCallExpression(node, subtreeFlags) {
+        var transformFlags = subtreeFlags;
+        var expression = node.expression;
+        var expressionKind = expression.kind;
+        if (node.typeArguments) {
+            transformFlags |= 3 /* AssertTypeScript */;
         }
-        function canFollowTypeArgumentsInExpression() {
-            switch (token()) {
-                case 17 /* OpenParenToken */: // foo<x>(
-                // this case are the only case where this token can legally follow a type argument
-                // list.  So we definitely want to treat this as a type arg list.
-                case 21 /* DotToken */: // foo<x>.
-                case 18 /* CloseParenToken */: // foo<x>)
-                case 20 /* CloseBracketToken */: // foo<x>]
-                case 54 /* ColonToken */: // foo<x>:
-                case 23 /* SemicolonToken */: // foo<x>;
-                case 53 /* QuestionToken */: // foo<x>?
-                case 30 /* EqualsEqualsToken */: // foo<x> ==
-                case 32 /* EqualsEqualsEqualsToken */: // foo<x> ===
-                case 31 /* ExclamationEqualsToken */: // foo<x> !=
-                case 33 /* ExclamationEqualsEqualsToken */: // foo<x> !==
-                case 51 /* AmpersandAmpersandToken */: // foo<x> &&
-                case 52 /* BarBarToken */: // foo<x> ||
-                case 48 /* CaretToken */: // foo<x> ^
-                case 46 /* AmpersandToken */: // foo<x> &
-                case 47 /* BarToken */: // foo<x> |
-                case 16 /* CloseBraceToken */: // foo<x> }
-                case 1 /* EndOfFileToken */:
-                    // these cases can't legally follow a type arg list.  However, they're not legal
-                    // expressions either.  The user is probably in the middle of a generic type. So
-                    // treat it as such.
-                    return true;
-                case 24 /* CommaToken */: // foo<x>,
-                case 15 /* OpenBraceToken */: // foo<x> {
-                // We don't want to treat these as type arguments.  Otherwise we'll parse this
-                // as an invocation expression.  Instead, we want to parse out the expression
-                // in isolation from the type arguments.
-                default:
-                    // Anything else treat as an expression.
-                    return false;
-            }
+        if (subtreeFlags & 524288 /* ContainsSpread */
+            || isSuperOrSuperProperty(expression, expressionKind)) {
+            // If the this node contains a SpreadExpression, or is a super call, then it is an ES6
+            // node.
+            transformFlags |= 192 /* AssertES2015 */;
         }
-        function parsePrimaryExpression() {
-            switch (token()) {
-                case 8 /* NumericLiteral */:
-                case 9 /* StringLiteral */:
-                case 11 /* NoSubstitutionTemplateLiteral */:
-                    return parseLiteralNode();
-                case 97 /* ThisKeyword */:
-                case 95 /* SuperKeyword */:
-                case 93 /* NullKeyword */:
-                case 99 /* TrueKeyword */:
-                case 84 /* FalseKeyword */:
-                    return parseTokenNode();
-                case 17 /* OpenParenToken */:
-                    return parseParenthesizedExpression();
-                case 19 /* OpenBracketToken */:
-                    return parseArrayLiteralExpression();
-                case 15 /* OpenBraceToken */:
-                    return parseObjectLiteralExpression();
-                case 118 /* AsyncKeyword */:
-                    // Async arrow functions are parsed earlier in parseAssignmentExpressionOrHigher.
-                    // If we encounter `async [no LineTerminator here] function` then this is an async
-                    // function; otherwise, its an identifier.
-                    if (!lookAhead(nextTokenIsFunctionKeywordOnSameLine)) {
-                        break;
-                    }
-                    return parseFunctionExpression();
-                case 73 /* ClassKeyword */:
-                    return parseClassExpression();
-                case 87 /* FunctionKeyword */:
-                    return parseFunctionExpression();
-                case 92 /* NewKeyword */:
-                    return parseNewExpression();
-                case 39 /* SlashToken */:
-                case 61 /* SlashEqualsToken */:
-                    if (reScanSlashToken() === 10 /* RegularExpressionLiteral */) {
-                        return parseLiteralNode();
-                    }
-                    break;
-                case 12 /* TemplateHead */:
-                    return parseTemplateExpression();
-            }
-            return parseIdentifier(ts.Diagnostics.Expression_expected);
+        if (expression.kind === 91 /* ImportKeyword */) {
+            transformFlags |= 67108864 /* ContainsDynamicImport */;
         }
-        function parseParenthesizedExpression() {
-            var node = createNode(178 /* ParenthesizedExpression */);
-            parseExpected(17 /* OpenParenToken */);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(18 /* CloseParenToken */);
-            return finishNode(node);
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~537396545 /* ArrayLiteralOrCallOrNewExcludes */;
+    }
+    function isSuperOrSuperProperty(node, kind) {
+        switch (kind) {
+            case 97 /* SuperKeyword */:
+                return true;
+            case 179 /* PropertyAccessExpression */:
+            case 180 /* ElementAccessExpression */:
+                var expression = node.expression;
+                var expressionKind = expression.kind;
+                return expressionKind === 97 /* SuperKeyword */;
         }
-        function parseSpreadElement() {
-            var node = createNode(191 /* SpreadElementExpression */);
-            parseExpected(22 /* DotDotDotToken */);
-            node.expression = parseAssignmentExpressionOrHigher();
-            return finishNode(node);
+        return false;
+    }
+    function computeNewExpression(node, subtreeFlags) {
+        var transformFlags = subtreeFlags;
+        if (node.typeArguments) {
+            transformFlags |= 3 /* AssertTypeScript */;
         }
-        function parseArgumentOrArrayLiteralElement() {
-            return token() === 22 /* DotDotDotToken */ ? parseSpreadElement() :
-                token() === 24 /* CommaToken */ ? createNode(193 /* OmittedExpression */) :
-                    parseAssignmentExpressionOrHigher();
+        if (subtreeFlags & 524288 /* ContainsSpread */) {
+            // If the this node contains a SpreadElementExpression then it is an ES6
+            // node.
+            transformFlags |= 192 /* AssertES2015 */;
         }
-        function parseArgumentExpression() {
-            return doOutsideOfContext(disallowInAndDecoratorContext, parseArgumentOrArrayLiteralElement);
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~537396545 /* ArrayLiteralOrCallOrNewExcludes */;
+    }
+    function computeBinaryExpression(node, subtreeFlags) {
+        var transformFlags = subtreeFlags;
+        var operatorTokenKind = node.operatorToken.kind;
+        var leftKind = node.left.kind;
+        if (operatorTokenKind === 58 /* EqualsToken */ && leftKind === 178 /* ObjectLiteralExpression */) {
+            // Destructuring object assignments with are ES2015 syntax
+            // and possibly ESNext if they contain rest
+            transformFlags |= 8 /* AssertESNext */ | 192 /* AssertES2015 */ | 3072 /* AssertDestructuringAssignment */;
         }
-        function parseArrayLiteralExpression() {
-            var node = createNode(170 /* ArrayLiteralExpression */);
-            parseExpected(19 /* OpenBracketToken */);
-            if (scanner.hasPrecedingLineBreak()) {
-                node.multiLine = true;
-            }
-            node.elements = parseDelimitedList(15 /* ArrayLiteralMembers */, parseArgumentOrArrayLiteralElement);
-            parseExpected(20 /* CloseBracketToken */);
-            return finishNode(node);
+        else if (operatorTokenKind === 58 /* EqualsToken */ && leftKind === 177 /* ArrayLiteralExpression */) {
+            // Destructuring assignments are ES2015 syntax.
+            transformFlags |= 192 /* AssertES2015 */ | 3072 /* AssertDestructuringAssignment */;
         }
-        function tryParseAccessorDeclaration(fullStart, decorators, modifiers) {
-            if (parseContextualModifier(123 /* GetKeyword */)) {
-                return parseAccessorDeclaration(149 /* GetAccessor */, fullStart, decorators, modifiers);
-            }
-            else if (parseContextualModifier(131 /* SetKeyword */)) {
-                return parseAccessorDeclaration(150 /* SetAccessor */, fullStart, decorators, modifiers);
-            }
-            return undefined;
+        else if (operatorTokenKind === 40 /* AsteriskAsteriskToken */
+            || operatorTokenKind === 62 /* AsteriskAsteriskEqualsToken */) {
+            // Exponentiation is ES2016 syntax.
+            transformFlags |= 32 /* AssertES2016 */;
         }
-        function parseObjectLiteralElement() {
-            var fullStart = scanner.getStartPos();
-            var decorators = parseDecorators();
-            var modifiers = parseModifiers();
-            var accessor = tryParseAccessorDeclaration(fullStart, decorators, modifiers);
-            if (accessor) {
-                return accessor;
-            }
-            var asteriskToken = parseOptionalToken(37 /* AsteriskToken */);
-            var tokenIsIdentifier = isIdentifier();
-            var propertyName = parsePropertyName();
-            // Disallowing of optional property assignments happens in the grammar checker.
-            var questionToken = parseOptionalToken(53 /* QuestionToken */);
-            if (asteriskToken || token() === 17 /* OpenParenToken */ || token() === 25 /* LessThanToken */) {
-                return parseMethodDeclaration(fullStart, decorators, modifiers, asteriskToken, propertyName, questionToken);
-            }
-            // check if it is short-hand property assignment or normal property assignment
-            // NOTE: if token is EqualsToken it is interpreted as CoverInitializedName production
-            // CoverInitializedName[Yield] :
-            //     IdentifierReference[?Yield] Initializer[In, ?Yield]
-            // this is necessary because ObjectLiteral productions are also used to cover grammar for ObjectAssignmentPattern
-            var isShorthandPropertyAssignment = tokenIsIdentifier && (token() === 24 /* CommaToken */ || token() === 16 /* CloseBraceToken */ || token() === 56 /* EqualsToken */);
-            if (isShorthandPropertyAssignment) {
-                var shorthandDeclaration = createNode(254 /* ShorthandPropertyAssignment */, fullStart);
-                shorthandDeclaration.name = propertyName;
-                shorthandDeclaration.questionToken = questionToken;
-                var equalsToken = parseOptionalToken(56 /* EqualsToken */);
-                if (equalsToken) {
-                    shorthandDeclaration.equalsToken = equalsToken;
-                    shorthandDeclaration.objectAssignmentInitializer = allowInAnd(parseAssignmentExpressionOrHigher);
-                }
-                return addJSDocComment(finishNode(shorthandDeclaration));
-            }
-            else {
-                var propertyAssignment = createNode(253 /* PropertyAssignment */, fullStart);
-                propertyAssignment.modifiers = modifiers;
-                propertyAssignment.name = propertyName;
-                propertyAssignment.questionToken = questionToken;
-                parseExpected(54 /* ColonToken */);
-                propertyAssignment.initializer = allowInAnd(parseAssignmentExpressionOrHigher);
-                return addJSDocComment(finishNode(propertyAssignment));
-            }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~536872257 /* NodeExcludes */;
+    }
+    function computeParameter(node, subtreeFlags) {
+        var transformFlags = subtreeFlags;
+        var modifierFlags = ts.getModifierFlags(node);
+        var name = node.name;
+        var initializer = node.initializer;
+        var dotDotDotToken = node.dotDotDotToken;
+        // The '?' token, type annotations, decorators, and 'this' parameters are TypeSCript
+        // syntax.
+        if (node.questionToken
+            || node.type
+            || subtreeFlags & 4096 /* ContainsDecorators */
+            || ts.isThisIdentifier(name)) {
+            transformFlags |= 3 /* AssertTypeScript */;
         }
-        function parseObjectLiteralExpression() {
-            var node = createNode(171 /* ObjectLiteralExpression */);
-            parseExpected(15 /* OpenBraceToken */);
-            if (scanner.hasPrecedingLineBreak()) {
-                node.multiLine = true;
-            }
-            node.properties = parseDelimitedList(12 /* ObjectLiteralMembers */, parseObjectLiteralElement, /*considerSemicolonAsDelimiter*/ true);
-            parseExpected(16 /* CloseBraceToken */);
-            return finishNode(node);
+        // If a parameter has an accessibility modifier, then it is TypeScript syntax.
+        if (modifierFlags & 92 /* ParameterPropertyModifier */) {
+            transformFlags |= 3 /* AssertTypeScript */ | 262144 /* ContainsParameterPropertyAssignments */;
         }
-        function parseFunctionExpression() {
-            // GeneratorExpression:
-            //      function* BindingIdentifier [Yield][opt](FormalParameters[Yield]){ GeneratorBody }
-            //
-            // FunctionExpression:
-            //      function BindingIdentifier[opt](FormalParameters){ FunctionBody }
-            var saveDecoratorContext = inDecoratorContext();
-            if (saveDecoratorContext) {
-                setDecoratorContext(/*val*/ false);
+        // parameters with object rest destructuring are ES Next syntax
+        if (subtreeFlags & 1048576 /* ContainsObjectRest */) {
+            transformFlags |= 8 /* AssertESNext */;
+        }
+        // If a parameter has an initializer, a binding pattern or a dotDotDot token, then
+        // it is ES6 syntax and its container must emit default value assignments or parameter destructuring downlevel.
+        if (subtreeFlags & 8388608 /* ContainsBindingPattern */ || initializer || dotDotDotToken) {
+            transformFlags |= 192 /* AssertES2015 */ | 131072 /* ContainsDefaultValueAssignments */;
+        }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~536872257 /* ParameterExcludes */;
+    }
+    function computeParenthesizedExpression(node, subtreeFlags) {
+        var transformFlags = subtreeFlags;
+        var expression = node.expression;
+        var expressionKind = expression.kind;
+        var expressionTransformFlags = expression.transformFlags;
+        // If the node is synthesized, it means the emitter put the parentheses there,
+        // not the user. If we didn't want them, the emitter would not have put them
+        // there.
+        if (expressionKind === 202 /* AsExpression */
+            || expressionKind === 184 /* TypeAssertionExpression */) {
+            transformFlags |= 3 /* AssertTypeScript */;
+        }
+        // If the expression of a ParenthesizedExpression is a destructuring assignment,
+        // then the ParenthesizedExpression is a destructuring assignment.
+        if (expressionTransformFlags & 1024 /* DestructuringAssignment */) {
+            transformFlags |= 1024 /* DestructuringAssignment */;
+        }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~536872257 /* NodeExcludes */;
+    }
+    function computeClassDeclaration(node, subtreeFlags) {
+        var transformFlags;
+        var modifierFlags = ts.getModifierFlags(node);
+        if (modifierFlags & 2 /* Ambient */) {
+            // An ambient declaration is TypeScript syntax.
+            transformFlags = 3 /* AssertTypeScript */;
+        }
+        else {
+            // A ClassDeclaration is ES6 syntax.
+            transformFlags = subtreeFlags | 192 /* AssertES2015 */;
+            // A class with a parameter property assignment, property initializer, or decorator is
+            // TypeScript syntax.
+            // An exported declaration may be TypeScript syntax, but is handled by the visitor
+            // for a namespace declaration.
+            if ((subtreeFlags & 274432 /* TypeScriptClassSyntaxMask */)
+                || node.typeParameters) {
+                transformFlags |= 3 /* AssertTypeScript */;
             }
-            var node = createNode(179 /* FunctionExpression */);
-            node.modifiers = parseModifiers();
-            parseExpected(87 /* FunctionKeyword */);
-            node.asteriskToken = parseOptionalToken(37 /* AsteriskToken */);
-            var isGenerator = !!node.asteriskToken;
-            var isAsync = !!(ts.getModifierFlags(node) & 256 /* Async */);
-            node.name =
-                isGenerator && isAsync ? doInYieldAndAwaitContext(parseOptionalIdentifier) :
-                    isGenerator ? doInYieldContext(parseOptionalIdentifier) :
-                        isAsync ? doInAwaitContext(parseOptionalIdentifier) :
-                            parseOptionalIdentifier();
-            fillSignature(54 /* ColonToken */, /*yieldContext*/ isGenerator, /*awaitContext*/ isAsync, /*requireCompleteParameterList*/ false, node);
-            node.body = parseFunctionBlock(/*allowYield*/ isGenerator, /*allowAwait*/ isAsync, /*ignoreMissingOpenBrace*/ false);
-            if (saveDecoratorContext) {
-                setDecoratorContext(/*val*/ true);
+            if (subtreeFlags & 65536 /* ContainsLexicalThisInComputedPropertyName */) {
+                // A computed property name containing `this` might need to be rewritten,
+                // so propagate the ContainsLexicalThis flag upward.
+                transformFlags |= 16384 /* ContainsLexicalThis */;
             }
-            return addJSDocComment(finishNode(node));
         }
-        function parseOptionalIdentifier() {
-            return isIdentifier() ? parseIdentifier() : undefined;
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~539358529 /* ClassExcludes */;
+    }
+    function computeClassExpression(node, subtreeFlags) {
+        // A ClassExpression is ES6 syntax.
+        var transformFlags = subtreeFlags | 192 /* AssertES2015 */;
+        // A class with a parameter property assignment, property initializer, or decorator is
+        // TypeScript syntax.
+        if (subtreeFlags & 274432 /* TypeScriptClassSyntaxMask */
+            || node.typeParameters) {
+            transformFlags |= 3 /* AssertTypeScript */;
+        }
+        if (subtreeFlags & 65536 /* ContainsLexicalThisInComputedPropertyName */) {
+            // A computed property name containing `this` might need to be rewritten,
+            // so propagate the ContainsLexicalThis flag upward.
+            transformFlags |= 16384 /* ContainsLexicalThis */;
+        }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~539358529 /* ClassExcludes */;
+    }
+    function computeHeritageClause(node, subtreeFlags) {
+        var transformFlags = subtreeFlags;
+        switch (node.token) {
+            case 85 /* ExtendsKeyword */:
+                // An `extends` HeritageClause is ES6 syntax.
+                transformFlags |= 192 /* AssertES2015 */;
+                break;
+            case 108 /* ImplementsKeyword */:
+                // An `implements` HeritageClause is TypeScript syntax.
+                transformFlags |= 3 /* AssertTypeScript */;
+                break;
+            default:
+                ts.Debug.fail("Unexpected token for heritage clause");
+                break;
+        }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~536872257 /* NodeExcludes */;
+    }
+    function computeCatchClause(node, subtreeFlags) {
+        var transformFlags = subtreeFlags;
+        if (node.variableDeclaration && ts.isBindingPattern(node.variableDeclaration.name)) {
+            transformFlags |= 192 /* AssertES2015 */;
+        }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~537920833 /* CatchClauseExcludes */;
+    }
+    function computeExpressionWithTypeArguments(node, subtreeFlags) {
+        // An ExpressionWithTypeArguments is ES6 syntax, as it is used in the
+        // extends clause of a class.
+        var transformFlags = subtreeFlags | 192 /* AssertES2015 */;
+        // If an ExpressionWithTypeArguments contains type arguments, then it
+        // is TypeScript syntax.
+        if (node.typeArguments) {
+            transformFlags |= 3 /* AssertTypeScript */;
+        }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~536872257 /* NodeExcludes */;
+    }
+    function computeConstructor(node, subtreeFlags) {
+        var transformFlags = subtreeFlags;
+        // TypeScript-specific modifiers and overloads are TypeScript syntax
+        if (ts.hasModifier(node, 2270 /* TypeScriptModifier */)
+            || !node.body) {
+            transformFlags |= 3 /* AssertTypeScript */;
+        }
+        // function declarations with object rest destructuring are ES Next syntax
+        if (subtreeFlags & 1048576 /* ContainsObjectRest */) {
+            transformFlags |= 8 /* AssertESNext */;
+        }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~601015617 /* ConstructorExcludes */;
+    }
+    function computeMethod(node, subtreeFlags) {
+        // A MethodDeclaration is ES6 syntax.
+        var transformFlags = subtreeFlags | 192 /* AssertES2015 */;
+        // Decorators, TypeScript-specific modifiers, type parameters, type annotations, and
+        // overloads are TypeScript syntax.
+        if (node.decorators
+            || ts.hasModifier(node, 2270 /* TypeScriptModifier */)
+            || node.typeParameters
+            || node.type
+            || !node.body) {
+            transformFlags |= 3 /* AssertTypeScript */;
+        }
+        // function declarations with object rest destructuring are ES Next syntax
+        if (subtreeFlags & 1048576 /* ContainsObjectRest */) {
+            transformFlags |= 8 /* AssertESNext */;
+        }
+        // An async method declaration is ES2017 syntax.
+        if (ts.hasModifier(node, 256 /* Async */)) {
+            transformFlags |= node.asteriskToken ? 8 /* AssertESNext */ : 16 /* AssertES2017 */;
+        }
+        if (node.asteriskToken) {
+            transformFlags |= 768 /* AssertGenerator */;
+        }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~601015617 /* MethodOrAccessorExcludes */;
+    }
+    function computeAccessor(node, subtreeFlags) {
+        var transformFlags = subtreeFlags;
+        // Decorators, TypeScript-specific modifiers, type annotations, and overloads are
+        // TypeScript syntax.
+        if (node.decorators
+            || ts.hasModifier(node, 2270 /* TypeScriptModifier */)
+            || node.type
+            || !node.body) {
+            transformFlags |= 3 /* AssertTypeScript */;
+        }
+        // function declarations with object rest destructuring are ES Next syntax
+        if (subtreeFlags & 1048576 /* ContainsObjectRest */) {
+            transformFlags |= 8 /* AssertESNext */;
+        }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~601015617 /* MethodOrAccessorExcludes */;
+    }
+    function computePropertyDeclaration(node, subtreeFlags) {
+        // A PropertyDeclaration is TypeScript syntax.
+        var transformFlags = subtreeFlags | 3 /* AssertTypeScript */;
+        // If the PropertyDeclaration has an initializer, we need to inform its ancestor
+        // so that it handle the transformation.
+        if (node.initializer) {
+            transformFlags |= 8192 /* ContainsPropertyInitializer */;
+        }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~536872257 /* NodeExcludes */;
+    }
+    function computeFunctionDeclaration(node, subtreeFlags) {
+        var transformFlags;
+        var modifierFlags = ts.getModifierFlags(node);
+        var body = node.body;
+        if (!body || (modifierFlags & 2 /* Ambient */)) {
+            // An ambient declaration is TypeScript syntax.
+            // A FunctionDeclaration without a body is an overload and is TypeScript syntax.
+            transformFlags = 3 /* AssertTypeScript */;
         }
-        function parseNewExpression() {
-            var node = createNode(175 /* NewExpression */);
-            parseExpected(92 /* NewKeyword */);
-            node.expression = parseMemberExpressionOrHigher();
-            node.typeArguments = tryParse(parseTypeArgumentsInExpression);
-            if (node.typeArguments || token() === 17 /* OpenParenToken */) {
-                node.arguments = parseArgumentList();
+        else {
+            transformFlags = subtreeFlags | 33554432 /* ContainsHoistedDeclarationOrCompletion */;
+            // TypeScript-specific modifiers, type parameters, and type annotations are TypeScript
+            // syntax.
+            if (modifierFlags & 2270 /* TypeScriptModifier */
+                || node.typeParameters
+                || node.type) {
+                transformFlags |= 3 /* AssertTypeScript */;
             }
-            return finishNode(node);
-        }
-        // STATEMENTS
-        function parseBlock(ignoreMissingOpenBrace, diagnosticMessage) {
-            var node = createNode(199 /* Block */);
-            if (parseExpected(15 /* OpenBraceToken */, diagnosticMessage) || ignoreMissingOpenBrace) {
-                if (scanner.hasPrecedingLineBreak()) {
-                    node.multiLine = true;
-                }
-                node.statements = parseList(1 /* BlockStatements */, parseStatement);
-                parseExpected(16 /* CloseBraceToken */);
+            // An async function declaration is ES2017 syntax.
+            if (modifierFlags & 256 /* Async */) {
+                transformFlags |= node.asteriskToken ? 8 /* AssertESNext */ : 16 /* AssertES2017 */;
             }
-            else {
-                node.statements = createMissingList();
+            // function declarations with object rest destructuring are ES Next syntax
+            if (subtreeFlags & 1048576 /* ContainsObjectRest */) {
+                transformFlags |= 8 /* AssertESNext */;
             }
-            return finishNode(node);
-        }
-        function parseFunctionBlock(allowYield, allowAwait, ignoreMissingOpenBrace, diagnosticMessage) {
-            var savedYieldContext = inYieldContext();
-            setYieldContext(allowYield);
-            var savedAwaitContext = inAwaitContext();
-            setAwaitContext(allowAwait);
-            // We may be in a [Decorator] context when parsing a function expression or
-            // arrow function. The body of the function is not in [Decorator] context.
-            var saveDecoratorContext = inDecoratorContext();
-            if (saveDecoratorContext) {
-                setDecoratorContext(/*val*/ false);
+            // If a FunctionDeclaration's subtree has marked the container as needing to capture the
+            // lexical this, or the function contains parameters with initializers, then this node is
+            // ES6 syntax.
+            if (subtreeFlags & 163840 /* ES2015FunctionSyntaxMask */) {
+                transformFlags |= 192 /* AssertES2015 */;
             }
-            var block = parseBlock(ignoreMissingOpenBrace, diagnosticMessage);
-            if (saveDecoratorContext) {
-                setDecoratorContext(/*val*/ true);
+            // If a FunctionDeclaration is generator function and is the body of a
+            // transformed async function, then this node can be transformed to a
+            // down-level generator.
+            // Currently we do not support transforming any other generator fucntions
+            // down level.
+            if (node.asteriskToken) {
+                transformFlags |= 768 /* AssertGenerator */;
             }
-            setYieldContext(savedYieldContext);
-            setAwaitContext(savedAwaitContext);
-            return block;
         }
-        function parseEmptyStatement() {
-            var node = createNode(201 /* EmptyStatement */);
-            parseExpected(23 /* SemicolonToken */);
-            return finishNode(node);
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~601281857 /* FunctionExcludes */;
+    }
+    function computeFunctionExpression(node, subtreeFlags) {
+        var transformFlags = subtreeFlags;
+        // TypeScript-specific modifiers, type parameters, and type annotations are TypeScript
+        // syntax.
+        if (ts.hasModifier(node, 2270 /* TypeScriptModifier */)
+            || node.typeParameters
+            || node.type) {
+            transformFlags |= 3 /* AssertTypeScript */;
         }
-        function parseIfStatement() {
-            var node = createNode(203 /* IfStatement */);
-            parseExpected(88 /* IfKeyword */);
-            parseExpected(17 /* OpenParenToken */);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(18 /* CloseParenToken */);
-            node.thenStatement = parseStatement();
-            node.elseStatement = parseOptional(80 /* ElseKeyword */) ? parseStatement() : undefined;
-            return finishNode(node);
+        // An async function expression is ES2017 syntax.
+        if (ts.hasModifier(node, 256 /* Async */)) {
+            transformFlags |= node.asteriskToken ? 8 /* AssertESNext */ : 16 /* AssertES2017 */;
         }
-        function parseDoStatement() {
-            var node = createNode(204 /* DoStatement */);
-            parseExpected(79 /* DoKeyword */);
-            node.statement = parseStatement();
-            parseExpected(104 /* WhileKeyword */);
-            parseExpected(17 /* OpenParenToken */);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(18 /* CloseParenToken */);
-            // From: https://mail.mozilla.org/pipermail/es-discuss/2011-August/016188.html
-            // 157 min --- All allen at wirfs-brock.com CONF --- "do{;}while(false)false" prohibited in
-            // spec but allowed in consensus reality. Approved -- this is the de-facto standard whereby
-            //  do;while(0)x will have a semicolon inserted before x.
-            parseOptional(23 /* SemicolonToken */);
-            return finishNode(node);
+        // function expressions with object rest destructuring are ES Next syntax
+        if (subtreeFlags & 1048576 /* ContainsObjectRest */) {
+            transformFlags |= 8 /* AssertESNext */;
         }
-        function parseWhileStatement() {
-            var node = createNode(205 /* WhileStatement */);
-            parseExpected(104 /* WhileKeyword */);
-            parseExpected(17 /* OpenParenToken */);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(18 /* CloseParenToken */);
-            node.statement = parseStatement();
-            return finishNode(node);
+        // If a FunctionExpression's subtree has marked the container as needing to capture the
+        // lexical this, or the function contains parameters with initializers, then this node is
+        // ES6 syntax.
+        if (subtreeFlags & 163840 /* ES2015FunctionSyntaxMask */) {
+            transformFlags |= 192 /* AssertES2015 */;
         }
-        function parseForOrForInOrForOfStatement() {
-            var pos = getNodePos();
-            parseExpected(86 /* ForKeyword */);
-            parseExpected(17 /* OpenParenToken */);
-            var initializer = undefined;
-            if (token() !== 23 /* SemicolonToken */) {
-                if (token() === 102 /* VarKeyword */ || token() === 108 /* LetKeyword */ || token() === 74 /* ConstKeyword */) {
-                    initializer = parseVariableDeclarationList(/*inForStatementInitializer*/ true);
-                }
-                else {
-                    initializer = disallowInAnd(parseExpression);
-                }
-            }
-            var forOrForInOrForOfStatement;
-            if (parseOptional(90 /* InKeyword */)) {
-                var forInStatement = createNode(207 /* ForInStatement */, pos);
-                forInStatement.initializer = initializer;
-                forInStatement.expression = allowInAnd(parseExpression);
-                parseExpected(18 /* CloseParenToken */);
-                forOrForInOrForOfStatement = forInStatement;
-            }
-            else if (parseOptional(138 /* OfKeyword */)) {
-                var forOfStatement = createNode(208 /* ForOfStatement */, pos);
-                forOfStatement.initializer = initializer;
-                forOfStatement.expression = allowInAnd(parseAssignmentExpressionOrHigher);
-                parseExpected(18 /* CloseParenToken */);
-                forOrForInOrForOfStatement = forOfStatement;
-            }
-            else {
-                var forStatement = createNode(206 /* ForStatement */, pos);
-                forStatement.initializer = initializer;
-                parseExpected(23 /* SemicolonToken */);
-                if (token() !== 23 /* SemicolonToken */ && token() !== 18 /* CloseParenToken */) {
-                    forStatement.condition = allowInAnd(parseExpression);
-                }
-                parseExpected(23 /* SemicolonToken */);
-                if (token() !== 18 /* CloseParenToken */) {
-                    forStatement.incrementor = allowInAnd(parseExpression);
-                }
-                parseExpected(18 /* CloseParenToken */);
-                forOrForInOrForOfStatement = forStatement;
-            }
-            forOrForInOrForOfStatement.statement = parseStatement();
-            return finishNode(forOrForInOrForOfStatement);
+        // If a FunctionExpression is generator function and is the body of a
+        // transformed async function, then this node can be transformed to a
+        // down-level generator.
+        if (node.asteriskToken) {
+            transformFlags |= 768 /* AssertGenerator */;
         }
-        function parseBreakOrContinueStatement(kind) {
-            var node = createNode(kind);
-            parseExpected(kind === 210 /* BreakStatement */ ? 70 /* BreakKeyword */ : 75 /* ContinueKeyword */);
-            if (!canParseSemicolon()) {
-                node.label = parseIdentifier();
-            }
-            parseSemicolon();
-            return finishNode(node);
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~601281857 /* FunctionExcludes */;
+    }
+    function computeArrowFunction(node, subtreeFlags) {
+        // An ArrowFunction is ES6 syntax, and excludes markers that should not escape the scope of an ArrowFunction.
+        var transformFlags = subtreeFlags | 192 /* AssertES2015 */;
+        // TypeScript-specific modifiers, type parameters, and type annotations are TypeScript
+        // syntax.
+        if (ts.hasModifier(node, 2270 /* TypeScriptModifier */)
+            || node.typeParameters
+            || node.type) {
+            transformFlags |= 3 /* AssertTypeScript */;
         }
-        function parseReturnStatement() {
-            var node = createNode(211 /* ReturnStatement */);
-            parseExpected(94 /* ReturnKeyword */);
-            if (!canParseSemicolon()) {
-                node.expression = allowInAnd(parseExpression);
-            }
-            parseSemicolon();
-            return finishNode(node);
+        // An async arrow function is ES2017 syntax.
+        if (ts.hasModifier(node, 256 /* Async */)) {
+            transformFlags |= 16 /* AssertES2017 */;
         }
-        function parseWithStatement() {
-            var node = createNode(212 /* WithStatement */);
-            parseExpected(105 /* WithKeyword */);
-            parseExpected(17 /* OpenParenToken */);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(18 /* CloseParenToken */);
-            node.statement = parseStatement();
-            return finishNode(node);
+        // arrow functions with object rest destructuring are ES Next syntax
+        if (subtreeFlags & 1048576 /* ContainsObjectRest */) {
+            transformFlags |= 8 /* AssertESNext */;
         }
-        function parseCaseClause() {
-            var node = createNode(249 /* CaseClause */);
-            parseExpected(71 /* CaseKeyword */);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(54 /* ColonToken */);
-            node.statements = parseList(3 /* SwitchClauseStatements */, parseStatement);
-            return finishNode(node);
+        // If an ArrowFunction contains a lexical this, its container must capture the lexical this.
+        if (subtreeFlags & 16384 /* ContainsLexicalThis */) {
+            transformFlags |= 32768 /* ContainsCapturedLexicalThis */;
         }
-        function parseDefaultClause() {
-            var node = createNode(250 /* DefaultClause */);
-            parseExpected(77 /* DefaultKeyword */);
-            parseExpected(54 /* ColonToken */);
-            node.statements = parseList(3 /* SwitchClauseStatements */, parseStatement);
-            return finishNode(node);
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~601249089 /* ArrowFunctionExcludes */;
+    }
+    function computePropertyAccess(node, subtreeFlags) {
+        var transformFlags = subtreeFlags;
+        var expression = node.expression;
+        var expressionKind = expression.kind;
+        // If a PropertyAccessExpression starts with a super keyword, then it is
+        // ES6 syntax, and requires a lexical `this` binding.
+        if (expressionKind === 97 /* SuperKeyword */) {
+            transformFlags |= 16384 /* ContainsLexicalThis */;
         }
-        function parseCaseOrDefaultClause() {
-            return token() === 71 /* CaseKeyword */ ? parseCaseClause() : parseDefaultClause();
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~536872257 /* NodeExcludes */;
+    }
+    function computeVariableDeclaration(node, subtreeFlags) {
+        var transformFlags = subtreeFlags;
+        transformFlags |= 192 /* AssertES2015 */ | 8388608 /* ContainsBindingPattern */;
+        // A VariableDeclaration containing ObjectRest is ESNext syntax
+        if (subtreeFlags & 1048576 /* ContainsObjectRest */) {
+            transformFlags |= 8 /* AssertESNext */;
         }
-        function parseSwitchStatement() {
-            var node = createNode(213 /* SwitchStatement */);
-            parseExpected(96 /* SwitchKeyword */);
-            parseExpected(17 /* OpenParenToken */);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(18 /* CloseParenToken */);
-            var caseBlock = createNode(227 /* CaseBlock */, scanner.getStartPos());
-            parseExpected(15 /* OpenBraceToken */);
-            caseBlock.clauses = parseList(2 /* SwitchClauses */, parseCaseOrDefaultClause);
-            parseExpected(16 /* CloseBraceToken */);
-            node.caseBlock = finishNode(caseBlock);
-            return finishNode(node);
+        // Type annotations are TypeScript syntax.
+        if (node.type) {
+            transformFlags |= 3 /* AssertTypeScript */;
         }
-        function parseThrowStatement() {
-            // ThrowStatement[Yield] :
-            //      throw [no LineTerminator here]Expression[In, ?Yield];
-            // Because of automatic semicolon insertion, we need to report error if this
-            // throw could be terminated with a semicolon.  Note: we can't call 'parseExpression'
-            // directly as that might consume an expression on the following line.
-            // We just return 'undefined' in that case.  The actual error will be reported in the
-            // grammar walker.
-            var node = createNode(215 /* ThrowStatement */);
-            parseExpected(98 /* ThrowKeyword */);
-            node.expression = scanner.hasPrecedingLineBreak() ? undefined : allowInAnd(parseExpression);
-            parseSemicolon();
-            return finishNode(node);
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~536872257 /* NodeExcludes */;
+    }
+    function computeVariableStatement(node, subtreeFlags) {
+        var transformFlags;
+        var modifierFlags = ts.getModifierFlags(node);
+        var declarationListTransformFlags = node.declarationList.transformFlags;
+        // An ambient declaration is TypeScript syntax.
+        if (modifierFlags & 2 /* Ambient */) {
+            transformFlags = 3 /* AssertTypeScript */;
         }
-        // TODO: Review for error recovery
-        function parseTryStatement() {
-            var node = createNode(216 /* TryStatement */);
-            parseExpected(100 /* TryKeyword */);
-            node.tryBlock = parseBlock(/*ignoreMissingOpenBrace*/ false);
-            node.catchClause = token() === 72 /* CatchKeyword */ ? parseCatchClause() : undefined;
-            // If we don't have a catch clause, then we must have a finally clause.  Try to parse
-            // one out no matter what.
-            if (!node.catchClause || token() === 85 /* FinallyKeyword */) {
-                parseExpected(85 /* FinallyKeyword */);
-                node.finallyBlock = parseBlock(/*ignoreMissingOpenBrace*/ false);
+        else {
+            transformFlags = subtreeFlags;
+            if (declarationListTransformFlags & 8388608 /* ContainsBindingPattern */) {
+                transformFlags |= 192 /* AssertES2015 */;
             }
-            return finishNode(node);
         }
-        function parseCatchClause() {
-            var result = createNode(252 /* CatchClause */);
-            parseExpected(72 /* CatchKeyword */);
-            if (parseExpected(17 /* OpenParenToken */)) {
-                result.variableDeclaration = parseVariableDeclaration();
-            }
-            parseExpected(18 /* CloseParenToken */);
-            result.block = parseBlock(/*ignoreMissingOpenBrace*/ false);
-            return finishNode(result);
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~536872257 /* NodeExcludes */;
+    }
+    function computeLabeledStatement(node, subtreeFlags) {
+        var transformFlags = subtreeFlags;
+        // A labeled statement containing a block scoped binding *may* need to be transformed from ES6.
+        if (subtreeFlags & 4194304 /* ContainsBlockScopedBinding */
+            && ts.isIterationStatement(node, /*lookInLabeledStatements*/ true)) {
+            transformFlags |= 192 /* AssertES2015 */;
         }
-        function parseDebuggerStatement() {
-            var node = createNode(217 /* DebuggerStatement */);
-            parseExpected(76 /* DebuggerKeyword */);
-            parseSemicolon();
-            return finishNode(node);
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~536872257 /* NodeExcludes */;
+    }
+    function computeImportEquals(node, subtreeFlags) {
+        var transformFlags = subtreeFlags;
+        // An ImportEqualsDeclaration with a namespace reference is TypeScript.
+        if (!ts.isExternalModuleImportEqualsDeclaration(node)) {
+            transformFlags |= 3 /* AssertTypeScript */;
         }
-        function parseExpressionOrLabeledStatement() {
-            // Avoiding having to do the lookahead for a labeled statement by just trying to parse
-            // out an expression, seeing if it is identifier and then seeing if it is followed by
-            // a colon.
-            var fullStart = scanner.getStartPos();
-            var expression = allowInAnd(parseExpression);
-            if (expression.kind === 69 /* Identifier */ && parseOptional(54 /* ColonToken */)) {
-                var labeledStatement = createNode(214 /* LabeledStatement */, fullStart);
-                labeledStatement.label = expression;
-                labeledStatement.statement = parseStatement();
-                return addJSDocComment(finishNode(labeledStatement));
-            }
-            else {
-                var expressionStatement = createNode(202 /* ExpressionStatement */, fullStart);
-                expressionStatement.expression = expression;
-                parseSemicolon();
-                return addJSDocComment(finishNode(expressionStatement));
-            }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~536872257 /* NodeExcludes */;
+    }
+    function computeExpressionStatement(node, subtreeFlags) {
+        var transformFlags = subtreeFlags;
+        // If the expression of an expression statement is a destructuring assignment,
+        // then we treat the statement as ES6 so that we can indicate that we do not
+        // need to hold on to the right-hand side.
+        if (node.expression.transformFlags & 1024 /* DestructuringAssignment */) {
+            transformFlags |= 192 /* AssertES2015 */;
         }
-        function nextTokenIsIdentifierOrKeywordOnSameLine() {
-            nextToken();
-            return ts.tokenIsIdentifierOrKeyword(token()) && !scanner.hasPrecedingLineBreak();
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~536872257 /* NodeExcludes */;
+    }
+    function computeModuleDeclaration(node, subtreeFlags) {
+        var transformFlags = 3 /* AssertTypeScript */;
+        var modifierFlags = ts.getModifierFlags(node);
+        if ((modifierFlags & 2 /* Ambient */) === 0) {
+            transformFlags |= subtreeFlags;
         }
-        function nextTokenIsFunctionKeywordOnSameLine() {
-            nextToken();
-            return token() === 87 /* FunctionKeyword */ && !scanner.hasPrecedingLineBreak();
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~574674241 /* ModuleExcludes */;
+    }
+    function computeVariableDeclarationList(node, subtreeFlags) {
+        var transformFlags = subtreeFlags | 33554432 /* ContainsHoistedDeclarationOrCompletion */;
+        if (subtreeFlags & 8388608 /* ContainsBindingPattern */) {
+            transformFlags |= 192 /* AssertES2015 */;
         }
-        function nextTokenIsIdentifierOrKeywordOrNumberOnSameLine() {
-            nextToken();
-            return (ts.tokenIsIdentifierOrKeyword(token()) || token() === 8 /* NumericLiteral */) && !scanner.hasPrecedingLineBreak();
+        // If a VariableDeclarationList is `let` or `const`, then it is ES6 syntax.
+        if (node.flags & 3 /* BlockScoped */) {
+            transformFlags |= 192 /* AssertES2015 */ | 4194304 /* ContainsBlockScopedBinding */;
         }
-        function isDeclaration() {
-            while (true) {
-                switch (token()) {
-                    case 102 /* VarKeyword */:
-                    case 108 /* LetKeyword */:
-                    case 74 /* ConstKeyword */:
-                    case 87 /* FunctionKeyword */:
-                    case 73 /* ClassKeyword */:
-                    case 81 /* EnumKeyword */:
-                        return true;
-                    // 'declare', 'module', 'namespace', 'interface'* and 'type' are all legal JavaScript identifiers;
-                    // however, an identifier cannot be followed by another identifier on the same line. This is what we
-                    // count on to parse out the respective declarations. For instance, we exploit this to say that
-                    //
-                    //    namespace n
-                    //
-                    // can be none other than the beginning of a namespace declaration, but need to respect that JavaScript sees
-                    //
-                    //    namespace
-                    //    n
-                    //
-                    // as the identifier 'namespace' on one line followed by the identifier 'n' on another.
-                    // We need to look one token ahead to see if it permissible to try parsing a declaration.
-                    //
-                    // *Note*: 'interface' is actually a strict mode reserved word. So while
-                    //
-                    //   "use strict"
-                    //   interface
-                    //   I {}
-                    //
-                    // could be legal, it would add complexity for very little gain.
-                    case 107 /* InterfaceKeyword */:
-                    case 134 /* TypeKeyword */:
-                        return nextTokenIsIdentifierOnSameLine();
-                    case 125 /* ModuleKeyword */:
-                    case 126 /* NamespaceKeyword */:
-                        return nextTokenIsIdentifierOrStringLiteralOnSameLine();
-                    case 115 /* AbstractKeyword */:
-                    case 118 /* AsyncKeyword */:
-                    case 122 /* DeclareKeyword */:
-                    case 110 /* PrivateKeyword */:
-                    case 111 /* ProtectedKeyword */:
-                    case 112 /* PublicKeyword */:
-                    case 128 /* ReadonlyKeyword */:
-                        nextToken();
-                        // ASI takes effect for this modifier.
-                        if (scanner.hasPrecedingLineBreak()) {
-                            return false;
-                        }
-                        continue;
-                    case 137 /* GlobalKeyword */:
-                        nextToken();
-                        return token() === 15 /* OpenBraceToken */ || token() === 69 /* Identifier */ || token() === 82 /* ExportKeyword */;
-                    case 89 /* ImportKeyword */:
-                        nextToken();
-                        return token() === 9 /* StringLiteral */ || token() === 37 /* AsteriskToken */ ||
-                            token() === 15 /* OpenBraceToken */ || ts.tokenIsIdentifierOrKeyword(token());
-                    case 82 /* ExportKeyword */:
-                        nextToken();
-                        if (token() === 56 /* EqualsToken */ || token() === 37 /* AsteriskToken */ ||
-                            token() === 15 /* OpenBraceToken */ || token() === 77 /* DefaultKeyword */ ||
-                            token() === 116 /* AsKeyword */) {
-                            return true;
-                        }
-                        continue;
-                    case 113 /* StaticKeyword */:
-                        nextToken();
-                        continue;
-                    default:
-                        return false;
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~546309441 /* VariableDeclarationListExcludes */;
+    }
+    function computeOther(node, kind, subtreeFlags) {
+        // Mark transformations needed for each node
+        var transformFlags = subtreeFlags;
+        var excludeFlags = 536872257 /* NodeExcludes */;
+        switch (kind) {
+            case 120 /* AsyncKeyword */:
+            case 191 /* AwaitExpression */:
+                // async/await is ES2017 syntax, but may be ESNext syntax (for async generators)
+                transformFlags |= 8 /* AssertESNext */ | 16 /* AssertES2017 */;
+                break;
+            case 114 /* PublicKeyword */:
+            case 112 /* PrivateKeyword */:
+            case 113 /* ProtectedKeyword */:
+            case 117 /* AbstractKeyword */:
+            case 124 /* DeclareKeyword */:
+            case 76 /* ConstKeyword */:
+            case 232 /* EnumDeclaration */:
+            case 264 /* EnumMember */:
+            case 184 /* TypeAssertionExpression */:
+            case 202 /* AsExpression */:
+            case 203 /* NonNullExpression */:
+            case 131 /* ReadonlyKeyword */:
+                // These nodes are TypeScript syntax.
+                transformFlags |= 3 /* AssertTypeScript */;
+                break;
+            case 249 /* JsxElement */:
+            case 250 /* JsxSelfClosingElement */:
+            case 251 /* JsxOpeningElement */:
+            case 10 /* JsxText */:
+            case 252 /* JsxClosingElement */:
+            case 253 /* JsxAttribute */:
+            case 254 /* JsxAttributes */:
+            case 255 /* JsxSpreadAttribute */:
+            case 256 /* JsxExpression */:
+                // These nodes are Jsx syntax.
+                transformFlags |= 4 /* AssertJsx */;
+                break;
+            case 13 /* NoSubstitutionTemplateLiteral */:
+            case 14 /* TemplateHead */:
+            case 15 /* TemplateMiddle */:
+            case 16 /* TemplateTail */:
+            case 196 /* TemplateExpression */:
+            case 183 /* TaggedTemplateExpression */:
+            case 262 /* ShorthandPropertyAssignment */:
+            case 115 /* StaticKeyword */:
+            case 204 /* MetaProperty */:
+                // These nodes are ES6 syntax.
+                transformFlags |= 192 /* AssertES2015 */;
+                break;
+            case 9 /* StringLiteral */:
+                if (node.hasExtendedUnicodeEscape) {
+                    transformFlags |= 192 /* AssertES2015 */;
+                }
+                break;
+            case 8 /* NumericLiteral */:
+                if (node.numericLiteralFlags & 48 /* BinaryOrOctalSpecifier */) {
+                    transformFlags |= 192 /* AssertES2015 */;
+                }
+                break;
+            case 216 /* ForOfStatement */:
+                // This node is either ES2015 syntax or ES2017 syntax (if it is a for-await-of).
+                if (node.awaitModifier) {
+                    transformFlags |= 8 /* AssertESNext */;
+                }
+                transformFlags |= 192 /* AssertES2015 */;
+                break;
+            case 197 /* YieldExpression */:
+                // This node is either ES2015 syntax (in a generator) or ES2017 syntax (in an async
+                // generator).
+                transformFlags |= 8 /* AssertESNext */ | 192 /* AssertES2015 */ | 16777216 /* ContainsYield */;
+                break;
+            case 119 /* AnyKeyword */:
+            case 133 /* NumberKeyword */:
+            case 130 /* NeverKeyword */:
+            case 134 /* ObjectKeyword */:
+            case 136 /* StringKeyword */:
+            case 122 /* BooleanKeyword */:
+            case 137 /* SymbolKeyword */:
+            case 105 /* VoidKeyword */:
+            case 145 /* TypeParameter */:
+            case 148 /* PropertySignature */:
+            case 150 /* MethodSignature */:
+            case 155 /* CallSignature */:
+            case 156 /* ConstructSignature */:
+            case 157 /* IndexSignature */:
+            case 158 /* TypePredicate */:
+            case 159 /* TypeReference */:
+            case 160 /* FunctionType */:
+            case 161 /* ConstructorType */:
+            case 162 /* TypeQuery */:
+            case 163 /* TypeLiteral */:
+            case 164 /* ArrayType */:
+            case 165 /* TupleType */:
+            case 166 /* UnionType */:
+            case 167 /* IntersectionType */:
+            case 168 /* ParenthesizedType */:
+            case 230 /* InterfaceDeclaration */:
+            case 231 /* TypeAliasDeclaration */:
+            case 169 /* ThisType */:
+            case 170 /* TypeOperator */:
+            case 171 /* IndexedAccessType */:
+            case 172 /* MappedType */:
+            case 173 /* LiteralType */:
+            case 236 /* NamespaceExportDeclaration */:
+                // Types and signatures are TypeScript syntax, and exclude all other facts.
+                transformFlags = 3 /* AssertTypeScript */;
+                excludeFlags = -3 /* TypeExcludes */;
+                break;
+            case 144 /* ComputedPropertyName */:
+                // Even though computed property names are ES6, we don't treat them as such.
+                // This is so that they can flow through PropertyName transforms unaffected.
+                // Instead, we mark the container as ES6, so that it can properly handle the transform.
+                transformFlags |= 2097152 /* ContainsComputedPropertyName */;
+                if (subtreeFlags & 16384 /* ContainsLexicalThis */) {
+                    // A computed method name like `[this.getName()](x: string) { ... }` needs to
+                    // distinguish itself from the normal case of a method body containing `this`:
+                    // `this` inside a method doesn't need to be rewritten (the method provides `this`),
+                    // whereas `this` inside a computed name *might* need to be rewritten if the class/object
+                    // is inside an arrow function:
+                    // `_this = this; () => class K { [_this.getName()]() { ... } }`
+                    // To make this distinction, use ContainsLexicalThisInComputedPropertyName
+                    // instead of ContainsLexicalThis for computed property names
+                    transformFlags |= 65536 /* ContainsLexicalThisInComputedPropertyName */;
+                }
+                break;
+            case 198 /* SpreadElement */:
+                transformFlags |= 192 /* AssertES2015 */ | 524288 /* ContainsSpread */;
+                break;
+            case 263 /* SpreadAssignment */:
+                transformFlags |= 8 /* AssertESNext */ | 1048576 /* ContainsObjectSpread */;
+                break;
+            case 97 /* SuperKeyword */:
+                // This node is ES6 syntax.
+                transformFlags |= 192 /* AssertES2015 */;
+                break;
+            case 99 /* ThisKeyword */:
+                // Mark this node and its ancestors as containing a lexical `this` keyword.
+                transformFlags |= 16384 /* ContainsLexicalThis */;
+                break;
+            case 174 /* ObjectBindingPattern */:
+                transformFlags |= 192 /* AssertES2015 */ | 8388608 /* ContainsBindingPattern */;
+                if (subtreeFlags & 524288 /* ContainsRest */) {
+                    transformFlags |= 8 /* AssertESNext */ | 1048576 /* ContainsObjectRest */;
+                }
+                excludeFlags = 537396545 /* BindingPatternExcludes */;
+                break;
+            case 175 /* ArrayBindingPattern */:
+                transformFlags |= 192 /* AssertES2015 */ | 8388608 /* ContainsBindingPattern */;
+                excludeFlags = 537396545 /* BindingPatternExcludes */;
+                break;
+            case 176 /* BindingElement */:
+                transformFlags |= 192 /* AssertES2015 */;
+                if (node.dotDotDotToken) {
+                    transformFlags |= 524288 /* ContainsRest */;
+                }
+                break;
+            case 147 /* Decorator */:
+                // This node is TypeScript syntax, and marks its container as also being TypeScript syntax.
+                transformFlags |= 3 /* AssertTypeScript */ | 4096 /* ContainsDecorators */;
+                break;
+            case 178 /* ObjectLiteralExpression */:
+                excludeFlags = 540087617 /* ObjectLiteralExcludes */;
+                if (subtreeFlags & 2097152 /* ContainsComputedPropertyName */) {
+                    // If an ObjectLiteralExpression contains a ComputedPropertyName, then it
+                    // is an ES6 node.
+                    transformFlags |= 192 /* AssertES2015 */;
+                }
+                if (subtreeFlags & 65536 /* ContainsLexicalThisInComputedPropertyName */) {
+                    // A computed property name containing `this` might need to be rewritten,
+                    // so propagate the ContainsLexicalThis flag upward.
+                    transformFlags |= 16384 /* ContainsLexicalThis */;
+                }
+                if (subtreeFlags & 1048576 /* ContainsObjectSpread */) {
+                    // If an ObjectLiteralExpression contains a spread element, then it
+                    // is an ES next node.
+                    transformFlags |= 8 /* AssertESNext */;
+                }
+                break;
+            case 177 /* ArrayLiteralExpression */:
+            case 182 /* NewExpression */:
+                excludeFlags = 537396545 /* ArrayLiteralOrCallOrNewExcludes */;
+                if (subtreeFlags & 524288 /* ContainsSpread */) {
+                    // If the this node contains a SpreadExpression, then it is an ES6
+                    // node.
+                    transformFlags |= 192 /* AssertES2015 */;
+                }
+                break;
+            case 212 /* DoStatement */:
+            case 213 /* WhileStatement */:
+            case 214 /* ForStatement */:
+            case 215 /* ForInStatement */:
+                // A loop containing a block scoped binding *may* need to be transformed from ES6.
+                if (subtreeFlags & 4194304 /* ContainsBlockScopedBinding */) {
+                    transformFlags |= 192 /* AssertES2015 */;
+                }
+                break;
+            case 265 /* SourceFile */:
+                if (subtreeFlags & 32768 /* ContainsCapturedLexicalThis */) {
+                    transformFlags |= 192 /* AssertES2015 */;
+                }
+                break;
+            case 219 /* ReturnStatement */:
+            case 217 /* ContinueStatement */:
+            case 218 /* BreakStatement */:
+                transformFlags |= 33554432 /* ContainsHoistedDeclarationOrCompletion */;
+                break;
+        }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~excludeFlags;
+    }
+    /**
+     * Gets the transform flags to exclude when unioning the transform flags of a subtree.
+     *
+     * NOTE: This needs to be kept up-to-date with the exclusions used in `computeTransformFlagsForNode`.
+     *       For performance reasons, `computeTransformFlagsForNode` uses local constant values rather
+     *       than calling this function.
+     */
+    /* @internal */
+    function getTransformFlagsSubtreeExclusions(kind) {
+        if (kind >= 158 /* FirstTypeNode */ && kind <= 173 /* LastTypeNode */) {
+            return -3 /* TypeExcludes */;
+        }
+        switch (kind) {
+            case 181 /* CallExpression */:
+            case 182 /* NewExpression */:
+            case 177 /* ArrayLiteralExpression */:
+                return 537396545 /* ArrayLiteralOrCallOrNewExcludes */;
+            case 233 /* ModuleDeclaration */:
+                return 574674241 /* ModuleExcludes */;
+            case 146 /* Parameter */:
+                return 536872257 /* ParameterExcludes */;
+            case 187 /* ArrowFunction */:
+                return 601249089 /* ArrowFunctionExcludes */;
+            case 186 /* FunctionExpression */:
+            case 228 /* FunctionDeclaration */:
+                return 601281857 /* FunctionExcludes */;
+            case 227 /* VariableDeclarationList */:
+                return 546309441 /* VariableDeclarationListExcludes */;
+            case 229 /* ClassDeclaration */:
+            case 199 /* ClassExpression */:
+                return 539358529 /* ClassExcludes */;
+            case 152 /* Constructor */:
+                return 601015617 /* ConstructorExcludes */;
+            case 151 /* MethodDeclaration */:
+            case 153 /* GetAccessor */:
+            case 154 /* SetAccessor */:
+                return 601015617 /* MethodOrAccessorExcludes */;
+            case 119 /* AnyKeyword */:
+            case 133 /* NumberKeyword */:
+            case 130 /* NeverKeyword */:
+            case 136 /* StringKeyword */:
+            case 134 /* ObjectKeyword */:
+            case 122 /* BooleanKeyword */:
+            case 137 /* SymbolKeyword */:
+            case 105 /* VoidKeyword */:
+            case 145 /* TypeParameter */:
+            case 148 /* PropertySignature */:
+            case 150 /* MethodSignature */:
+            case 155 /* CallSignature */:
+            case 156 /* ConstructSignature */:
+            case 157 /* IndexSignature */:
+            case 230 /* InterfaceDeclaration */:
+            case 231 /* TypeAliasDeclaration */:
+                return -3 /* TypeExcludes */;
+            case 178 /* ObjectLiteralExpression */:
+                return 540087617 /* ObjectLiteralExcludes */;
+            case 260 /* CatchClause */:
+                return 537920833 /* CatchClauseExcludes */;
+            case 174 /* ObjectBindingPattern */:
+            case 175 /* ArrayBindingPattern */:
+                return 537396545 /* BindingPatternExcludes */;
+            default:
+                return 536872257 /* NodeExcludes */;
+        }
+    }
+    ts.getTransformFlagsSubtreeExclusions = getTransformFlagsSubtreeExclusions;
+    /**
+     * "Binds" JSDoc nodes in TypeScript code.
+     * Since we will never create symbols for JSDoc, we just set parent pointers instead.
+     */
+    function setParentPointers(parent, child) {
+        child.parent = parent;
+        ts.forEachChild(child, function (childsChild) { return setParentPointers(child, childsChild); });
+    }
+})(ts || (ts = {}));
+/// <reference path="core.ts" />
+/// <reference path="diagnosticInformationMap.generated.ts" />
+var ts;
+(function (ts) {
+    function trace(host) {
+        host.trace(ts.formatMessage.apply(undefined, arguments));
+    }
+    ts.trace = trace;
+    /* @internal */
+    function isTraceEnabled(compilerOptions, host) {
+        return compilerOptions.traceResolution && host.trace !== undefined;
+    }
+    ts.isTraceEnabled = isTraceEnabled;
+    /**
+     * Kinds of file that we are currently looking for.
+     * Typically there is one pass with Extensions.TypeScript, then a second pass with Extensions.JavaScript.
+     */
+    var Extensions;
+    (function (Extensions) {
+        Extensions[Extensions["TypeScript"] = 0] = "TypeScript";
+        Extensions[Extensions["JavaScript"] = 1] = "JavaScript";
+        Extensions[Extensions["DtsOnly"] = 2] = "DtsOnly"; /** Only '.d.ts' */
+    })(Extensions || (Extensions = {}));
+    /** Used with `Extensions.DtsOnly` to extract the path from TypeScript results. */
+    function resolvedTypeScriptOnly(resolved) {
+        if (!resolved) {
+            return undefined;
+        }
+        ts.Debug.assert(ts.extensionIsTypeScript(resolved.extension));
+        return resolved.path;
+    }
+    function createResolvedModuleWithFailedLookupLocations(resolved, isExternalLibraryImport, failedLookupLocations) {
+        return {
+            resolvedModule: resolved && { resolvedFileName: resolved.path, extension: resolved.extension, isExternalLibraryImport: isExternalLibraryImport },
+            failedLookupLocations: failedLookupLocations
+        };
+    }
+    function moduleHasNonRelativeName(moduleName) {
+        return !(ts.isRootedDiskPath(moduleName) || ts.isExternalModuleNameRelative(moduleName));
+    }
+    ts.moduleHasNonRelativeName = moduleHasNonRelativeName;
+    /** Reads from "main" or "types"/"typings" depending on `extensions`. */
+    function tryReadPackageJsonFields(readTypes, packageJsonPath, baseDirectory, state) {
+        var jsonContent = readJson(packageJsonPath, state.host);
+        return readTypes ? tryReadFromField("typings") || tryReadFromField("types") : tryReadFromField("main");
+        function tryReadFromField(fieldName) {
+            if (!ts.hasProperty(jsonContent, fieldName)) {
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.package_json_does_not_have_a_0_field, fieldName);
+                }
+                return;
+            }
+            var fileName = jsonContent[fieldName];
+            if (typeof fileName !== "string") {
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.Expected_type_of_0_field_in_package_json_to_be_string_got_1, fieldName, typeof fileName);
                 }
+                return;
+            }
+            var path = ts.normalizePath(ts.combinePaths(baseDirectory, fileName));
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.package_json_has_0_field_1_that_references_2, fieldName, fileName, path);
             }
+            return path;
         }
-        function isStartOfDeclaration() {
-            return lookAhead(isDeclaration);
+    }
+    function readJson(path, host) {
+        try {
+            var jsonText = host.readFile(path);
+            return jsonText ? JSON.parse(jsonText) : {};
         }
-        function isStartOfStatement() {
-            switch (token()) {
-                case 55 /* AtToken */:
-                case 23 /* SemicolonToken */:
-                case 15 /* OpenBraceToken */:
-                case 102 /* VarKeyword */:
-                case 108 /* LetKeyword */:
-                case 87 /* FunctionKeyword */:
-                case 73 /* ClassKeyword */:
-                case 81 /* EnumKeyword */:
-                case 88 /* IfKeyword */:
-                case 79 /* DoKeyword */:
-                case 104 /* WhileKeyword */:
-                case 86 /* ForKeyword */:
-                case 75 /* ContinueKeyword */:
-                case 70 /* BreakKeyword */:
-                case 94 /* ReturnKeyword */:
-                case 105 /* WithKeyword */:
-                case 96 /* SwitchKeyword */:
-                case 98 /* ThrowKeyword */:
-                case 100 /* TryKeyword */:
-                case 76 /* DebuggerKeyword */:
-                // 'catch' and 'finally' do not actually indicate that the code is part of a statement,
-                // however, we say they are here so that we may gracefully parse them and error later.
-                case 72 /* CatchKeyword */:
-                case 85 /* FinallyKeyword */:
-                    return true;
-                case 74 /* ConstKeyword */:
-                case 82 /* ExportKeyword */:
-                case 89 /* ImportKeyword */:
-                    return isStartOfDeclaration();
-                case 118 /* AsyncKeyword */:
-                case 122 /* DeclareKeyword */:
-                case 107 /* InterfaceKeyword */:
-                case 125 /* ModuleKeyword */:
-                case 126 /* NamespaceKeyword */:
-                case 134 /* TypeKeyword */:
-                case 137 /* GlobalKeyword */:
-                    // When these don't start a declaration, they're an identifier in an expression statement
-                    return true;
-                case 112 /* PublicKeyword */:
-                case 110 /* PrivateKeyword */:
-                case 111 /* ProtectedKeyword */:
-                case 113 /* StaticKeyword */:
-                case 128 /* ReadonlyKeyword */:
-                    // When these don't start a declaration, they may be the start of a class member if an identifier
-                    // immediately follows. Otherwise they're an identifier in an expression statement.
-                    return isStartOfDeclaration() || !lookAhead(nextTokenIsIdentifierOrKeywordOnSameLine);
-                default:
-                    return isStartOfExpression();
+        catch (e) {
+            // gracefully handle if readFile fails or returns not JSON
+            return {};
+        }
+    }
+    function getEffectiveTypeRoots(options, host) {
+        if (options.typeRoots) {
+            return options.typeRoots;
+        }
+        var currentDirectory;
+        if (options.configFilePath) {
+            currentDirectory = ts.getDirectoryPath(options.configFilePath);
+        }
+        else if (host.getCurrentDirectory) {
+            currentDirectory = host.getCurrentDirectory();
+        }
+        if (currentDirectory !== undefined) {
+            return getDefaultTypeRoots(currentDirectory, host);
+        }
+    }
+    ts.getEffectiveTypeRoots = getEffectiveTypeRoots;
+    /**
+     * Returns the path to every node_modules/@types directory from some ancestor directory.
+     * Returns undefined if there are none.
+     */
+    function getDefaultTypeRoots(currentDirectory, host) {
+        if (!host.directoryExists) {
+            return [ts.combinePaths(currentDirectory, nodeModulesAtTypes)];
+            // And if it doesn't exist, tough.
+        }
+        var typeRoots;
+        forEachAncestorDirectory(ts.normalizePath(currentDirectory), function (directory) {
+            var atTypes = ts.combinePaths(directory, nodeModulesAtTypes);
+            if (host.directoryExists(atTypes)) {
+                (typeRoots || (typeRoots = [])).push(atTypes);
+            }
+            return undefined;
+        });
+        return typeRoots;
+    }
+    var nodeModulesAtTypes = ts.combinePaths("node_modules", "@types");
+    /**
+     * @param {string | undefined} containingFile - file that contains type reference directive, can be undefined if containing file is unknown.
+     * This is possible in case if resolution is performed for directives specified via 'types' parameter. In this case initial path for secondary lookups
+     * is assumed to be the same as root directory of the project.
+     */
+    function resolveTypeReferenceDirective(typeReferenceDirectiveName, containingFile, options, host) {
+        var traceEnabled = isTraceEnabled(options, host);
+        var moduleResolutionState = {
+            compilerOptions: options,
+            host: host,
+            traceEnabled: traceEnabled
+        };
+        var typeRoots = getEffectiveTypeRoots(options, host);
+        if (traceEnabled) {
+            if (containingFile === undefined) {
+                if (typeRoots === undefined) {
+                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set, typeReferenceDirectiveName);
+                }
+                else {
+                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1, typeReferenceDirectiveName, typeRoots);
+                }
+            }
+            else {
+                if (typeRoots === undefined) {
+                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set, typeReferenceDirectiveName, containingFile);
+                }
+                else {
+                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_1_root_directory_2, typeReferenceDirectiveName, containingFile, typeRoots);
+                }
             }
         }
-        function nextTokenIsIdentifierOrStartOfDestructuring() {
-            nextToken();
-            return isIdentifier() || token() === 15 /* OpenBraceToken */ || token() === 19 /* OpenBracketToken */;
-        }
-        function isLetDeclaration() {
-            // In ES6 'let' always starts a lexical declaration if followed by an identifier or {
-            // or [.
-            return lookAhead(nextTokenIsIdentifierOrStartOfDestructuring);
-        }
-        function parseStatement() {
-            switch (token()) {
-                case 23 /* SemicolonToken */:
-                    return parseEmptyStatement();
-                case 15 /* OpenBraceToken */:
-                    return parseBlock(/*ignoreMissingOpenBrace*/ false);
-                case 102 /* VarKeyword */:
-                    return parseVariableStatement(scanner.getStartPos(), /*decorators*/ undefined, /*modifiers*/ undefined);
-                case 108 /* LetKeyword */:
-                    if (isLetDeclaration()) {
-                        return parseVariableStatement(scanner.getStartPos(), /*decorators*/ undefined, /*modifiers*/ undefined);
-                    }
-                    break;
-                case 87 /* FunctionKeyword */:
-                    return parseFunctionDeclaration(scanner.getStartPos(), /*decorators*/ undefined, /*modifiers*/ undefined);
-                case 73 /* ClassKeyword */:
-                    return parseClassDeclaration(scanner.getStartPos(), /*decorators*/ undefined, /*modifiers*/ undefined);
-                case 88 /* IfKeyword */:
-                    return parseIfStatement();
-                case 79 /* DoKeyword */:
-                    return parseDoStatement();
-                case 104 /* WhileKeyword */:
-                    return parseWhileStatement();
-                case 86 /* ForKeyword */:
-                    return parseForOrForInOrForOfStatement();
-                case 75 /* ContinueKeyword */:
-                    return parseBreakOrContinueStatement(209 /* ContinueStatement */);
-                case 70 /* BreakKeyword */:
-                    return parseBreakOrContinueStatement(210 /* BreakStatement */);
-                case 94 /* ReturnKeyword */:
-                    return parseReturnStatement();
-                case 105 /* WithKeyword */:
-                    return parseWithStatement();
-                case 96 /* SwitchKeyword */:
-                    return parseSwitchStatement();
-                case 98 /* ThrowKeyword */:
-                    return parseThrowStatement();
-                case 100 /* TryKeyword */:
-                // Include 'catch' and 'finally' for error recovery.
-                case 72 /* CatchKeyword */:
-                case 85 /* FinallyKeyword */:
-                    return parseTryStatement();
-                case 76 /* DebuggerKeyword */:
-                    return parseDebuggerStatement();
-                case 55 /* AtToken */:
-                    return parseDeclaration();
-                case 118 /* AsyncKeyword */:
-                case 107 /* InterfaceKeyword */:
-                case 134 /* TypeKeyword */:
-                case 125 /* ModuleKeyword */:
-                case 126 /* NamespaceKeyword */:
-                case 122 /* DeclareKeyword */:
-                case 74 /* ConstKeyword */:
-                case 81 /* EnumKeyword */:
-                case 82 /* ExportKeyword */:
-                case 89 /* ImportKeyword */:
-                case 110 /* PrivateKeyword */:
-                case 111 /* ProtectedKeyword */:
-                case 112 /* PublicKeyword */:
-                case 115 /* AbstractKeyword */:
-                case 113 /* StaticKeyword */:
-                case 128 /* ReadonlyKeyword */:
-                case 137 /* GlobalKeyword */:
-                    if (isStartOfDeclaration()) {
-                        return parseDeclaration();
-                    }
-                    break;
+        var failedLookupLocations = [];
+        var resolved = primaryLookup();
+        var primary = true;
+        if (!resolved) {
+            resolved = secondaryLookup();
+            primary = false;
+        }
+        var resolvedTypeReferenceDirective;
+        if (resolved) {
+            resolved = realpath(resolved, host, traceEnabled);
+            if (traceEnabled) {
+                trace(host, ts.Diagnostics.Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2, typeReferenceDirectiveName, resolved, primary);
             }
-            return parseExpressionOrLabeledStatement();
+            resolvedTypeReferenceDirective = { primary: primary, resolvedFileName: resolved };
         }
-        function parseDeclaration() {
-            var fullStart = getNodePos();
-            var decorators = parseDecorators();
-            var modifiers = parseModifiers();
-            switch (token()) {
-                case 102 /* VarKeyword */:
-                case 108 /* LetKeyword */:
-                case 74 /* ConstKeyword */:
-                    return parseVariableStatement(fullStart, decorators, modifiers);
-                case 87 /* FunctionKeyword */:
-                    return parseFunctionDeclaration(fullStart, decorators, modifiers);
-                case 73 /* ClassKeyword */:
-                    return parseClassDeclaration(fullStart, decorators, modifiers);
-                case 107 /* InterfaceKeyword */:
-                    return parseInterfaceDeclaration(fullStart, decorators, modifiers);
-                case 134 /* TypeKeyword */:
-                    return parseTypeAliasDeclaration(fullStart, decorators, modifiers);
-                case 81 /* EnumKeyword */:
-                    return parseEnumDeclaration(fullStart, decorators, modifiers);
-                case 137 /* GlobalKeyword */:
-                case 125 /* ModuleKeyword */:
-                case 126 /* NamespaceKeyword */:
-                    return parseModuleDeclaration(fullStart, decorators, modifiers);
-                case 89 /* ImportKeyword */:
-                    return parseImportDeclarationOrImportEqualsDeclaration(fullStart, decorators, modifiers);
-                case 82 /* ExportKeyword */:
-                    nextToken();
-                    switch (token()) {
-                        case 77 /* DefaultKeyword */:
-                        case 56 /* EqualsToken */:
-                            return parseExportAssignment(fullStart, decorators, modifiers);
-                        case 116 /* AsKeyword */:
-                            return parseNamespaceExportDeclaration(fullStart, decorators, modifiers);
-                        default:
-                            return parseExportDeclaration(fullStart, decorators, modifiers);
-                    }
-                default:
-                    if (decorators || modifiers) {
-                        // We reached this point because we encountered decorators and/or modifiers and assumed a declaration
-                        // would follow. For recovery and error reporting purposes, return an incomplete declaration.
-                        var node = createMissingNode(239 /* MissingDeclaration */, /*reportAtCurrentPosition*/ true, ts.Diagnostics.Declaration_expected);
-                        node.pos = fullStart;
-                        node.decorators = decorators;
-                        node.modifiers = modifiers;
-                        return finishNode(node);
+        return { resolvedTypeReferenceDirective: resolvedTypeReferenceDirective, failedLookupLocations: failedLookupLocations };
+        function primaryLookup() {
+            // Check primary library paths
+            if (typeRoots && typeRoots.length) {
+                if (traceEnabled) {
+                    trace(host, ts.Diagnostics.Resolving_with_primary_search_path_0, typeRoots.join(", "));
+                }
+                return ts.forEach(typeRoots, function (typeRoot) {
+                    var candidate = ts.combinePaths(typeRoot, typeReferenceDirectiveName);
+                    var candidateDirectory = ts.getDirectoryPath(candidate);
+                    var directoryExists = directoryProbablyExists(candidateDirectory, host);
+                    if (!directoryExists && traceEnabled) {
+                        trace(host, ts.Diagnostics.Directory_0_does_not_exist_skipping_all_lookups_in_it, candidateDirectory);
                     }
+                    return resolvedTypeScriptOnly(loadNodeModuleFromDirectory(Extensions.DtsOnly, candidate, failedLookupLocations, !directoryExists, moduleResolutionState));
+                });
             }
-        }
-        function nextTokenIsIdentifierOrStringLiteralOnSameLine() {
-            nextToken();
-            return !scanner.hasPrecedingLineBreak() && (isIdentifier() || token() === 9 /* StringLiteral */);
-        }
-        function parseFunctionBlockOrSemicolon(isGenerator, isAsync, diagnosticMessage) {
-            if (token() !== 15 /* OpenBraceToken */ && canParseSemicolon()) {
-                parseSemicolon();
-                return;
-            }
-            return parseFunctionBlock(isGenerator, isAsync, /*ignoreMissingOpenBrace*/ false, diagnosticMessage);
-        }
-        // DECLARATIONS
-        function parseArrayBindingElement() {
-            if (token() === 24 /* CommaToken */) {
-                return createNode(193 /* OmittedExpression */);
+            else {
+                if (traceEnabled) {
+                    trace(host, ts.Diagnostics.Root_directory_cannot_be_determined_skipping_primary_search_paths);
+                }
             }
-            var node = createNode(169 /* BindingElement */);
-            node.dotDotDotToken = parseOptionalToken(22 /* DotDotDotToken */);
-            node.name = parseIdentifierOrPattern();
-            node.initializer = parseBindingElementInitializer(/*inParameter*/ false);
-            return finishNode(node);
         }
-        function parseObjectBindingElement() {
-            var node = createNode(169 /* BindingElement */);
-            var tokenIsIdentifier = isIdentifier();
-            var propertyName = parsePropertyName();
-            if (tokenIsIdentifier && token() !== 54 /* ColonToken */) {
-                node.name = propertyName;
+        function secondaryLookup() {
+            var resolvedFile;
+            var initialLocationForSecondaryLookup = containingFile && ts.getDirectoryPath(containingFile);
+            if (initialLocationForSecondaryLookup !== undefined) {
+                // check secondary locations
+                if (traceEnabled) {
+                    trace(host, ts.Diagnostics.Looking_up_in_node_modules_folder_initial_location_0, initialLocationForSecondaryLookup);
+                }
+                var result = loadModuleFromNodeModules(Extensions.DtsOnly, typeReferenceDirectiveName, initialLocationForSecondaryLookup, failedLookupLocations, moduleResolutionState, /*cache*/ undefined);
+                resolvedFile = resolvedTypeScriptOnly(result && result.value);
+                if (!resolvedFile && traceEnabled) {
+                    trace(host, ts.Diagnostics.Type_reference_directive_0_was_not_resolved, typeReferenceDirectiveName);
+                }
+                return resolvedFile;
             }
             else {
-                parseExpected(54 /* ColonToken */);
-                node.propertyName = propertyName;
-                node.name = parseIdentifierOrPattern();
+                if (traceEnabled) {
+                    trace(host, ts.Diagnostics.Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_modules_folder);
+                }
             }
-            node.initializer = parseBindingElementInitializer(/*inParameter*/ false);
-            return finishNode(node);
         }
-        function parseObjectBindingPattern() {
-            var node = createNode(167 /* ObjectBindingPattern */);
-            parseExpected(15 /* OpenBraceToken */);
-            node.elements = parseDelimitedList(9 /* ObjectBindingElements */, parseObjectBindingElement);
-            parseExpected(16 /* CloseBraceToken */);
-            return finishNode(node);
+    }
+    ts.resolveTypeReferenceDirective = resolveTypeReferenceDirective;
+    /**
+     * Given a set of options, returns the set of type directive names
+     *   that should be included for this program automatically.
+     * This list could either come from the config file,
+     *   or from enumerating the types root + initial secondary types lookup location.
+     * More type directives might appear in the program later as a result of loading actual source files;
+     *   this list is only the set of defaults that are implicitly included.
+     */
+    function getAutomaticTypeDirectiveNames(options, host) {
+        // Use explicit type list from tsconfig.json
+        if (options.types) {
+            return options.types;
         }
-        function parseArrayBindingPattern() {
-            var node = createNode(168 /* ArrayBindingPattern */);
-            parseExpected(19 /* OpenBracketToken */);
-            node.elements = parseDelimitedList(10 /* ArrayBindingElements */, parseArrayBindingElement);
-            parseExpected(20 /* CloseBracketToken */);
-            return finishNode(node);
+        // Walk the primary type lookup locations
+        var result = [];
+        if (host.directoryExists && host.getDirectories) {
+            var typeRoots = getEffectiveTypeRoots(options, host);
+            if (typeRoots) {
+                for (var _i = 0, typeRoots_1 = typeRoots; _i < typeRoots_1.length; _i++) {
+                    var root = typeRoots_1[_i];
+                    if (host.directoryExists(root)) {
+                        for (var _a = 0, _b = host.getDirectories(root); _a < _b.length; _a++) {
+                            var typeDirectivePath = _b[_a];
+                            var normalized = ts.normalizePath(typeDirectivePath);
+                            var packageJsonPath = pathToPackageJson(ts.combinePaths(root, normalized));
+                            // tslint:disable-next-line:no-null-keyword
+                            var isNotNeededPackage = host.fileExists(packageJsonPath) && readJson(packageJsonPath, host).typings === null;
+                            if (!isNotNeededPackage) {
+                                // Return just the type directive names
+                                result.push(ts.getBaseFileName(normalized));
+                            }
+                        }
+                    }
+                }
+            }
         }
-        function isIdentifierOrPattern() {
-            return token() === 15 /* OpenBraceToken */ || token() === 19 /* OpenBracketToken */ || isIdentifier();
+        return result;
+    }
+    ts.getAutomaticTypeDirectiveNames = getAutomaticTypeDirectiveNames;
+    function createModuleResolutionCache(currentDirectory, getCanonicalFileName) {
+        var directoryToModuleNameMap = ts.createFileMap();
+        var moduleNameToDirectoryMap = ts.createMap();
+        return { getOrCreateCacheForDirectory: getOrCreateCacheForDirectory, getOrCreateCacheForModuleName: getOrCreateCacheForModuleName };
+        function getOrCreateCacheForDirectory(directoryName) {
+            var path = ts.toPath(directoryName, currentDirectory, getCanonicalFileName);
+            var perFolderCache = directoryToModuleNameMap.get(path);
+            if (!perFolderCache) {
+                perFolderCache = ts.createMap();
+                directoryToModuleNameMap.set(path, perFolderCache);
+            }
+            return perFolderCache;
+        }
+        function getOrCreateCacheForModuleName(nonRelativeModuleName) {
+            if (!moduleHasNonRelativeName(nonRelativeModuleName)) {
+                return undefined;
+            }
+            var perModuleNameCache = moduleNameToDirectoryMap.get(nonRelativeModuleName);
+            if (!perModuleNameCache) {
+                perModuleNameCache = createPerModuleNameCache();
+                moduleNameToDirectoryMap.set(nonRelativeModuleName, perModuleNameCache);
+            }
+            return perModuleNameCache;
         }
-        function parseIdentifierOrPattern() {
-            if (token() === 19 /* OpenBracketToken */) {
-                return parseArrayBindingPattern();
+        function createPerModuleNameCache() {
+            var directoryPathMap = ts.createFileMap();
+            return { get: get, set: set };
+            function get(directory) {
+                return directoryPathMap.get(ts.toPath(directory, currentDirectory, getCanonicalFileName));
             }
-            if (token() === 15 /* OpenBraceToken */) {
-                return parseObjectBindingPattern();
+            /**
+             * At first this function add entry directory -> module resolution result to the table.
+             * Then it computes the set of parent folders for 'directory' that should have the same module resolution result
+             * and for every parent folder in set it adds entry: parent -> module resolution. .
+             * Lets say we first directory name: /a/b/c/d/e and resolution result is: /a/b/bar.ts.
+             * Set of parent folders that should have the same result will be:
+             * [
+             *     /a/b/c/d, /a/b/c, /a/b
+             * ]
+             * this means that request for module resolution from file in any of these folder will be immediately found in cache.
+             */
+            function set(directory, result) {
+                var path = ts.toPath(directory, currentDirectory, getCanonicalFileName);
+                // if entry is already in cache do nothing
+                if (directoryPathMap.contains(path)) {
+                    return;
+                }
+                directoryPathMap.set(path, result);
+                var resolvedFileName = result.resolvedModule && result.resolvedModule.resolvedFileName;
+                // find common prefix between directory and resolved file name
+                // this common prefix should be the shorted path that has the same resolution
+                // directory: /a/b/c/d/e
+                // resolvedFileName: /a/b/foo.d.ts
+                var commonPrefix = getCommonPrefix(path, resolvedFileName);
+                var current = path;
+                while (true) {
+                    var parent_5 = ts.getDirectoryPath(current);
+                    if (parent_5 === current || directoryPathMap.contains(parent_5)) {
+                        break;
+                    }
+                    directoryPathMap.set(parent_5, result);
+                    current = parent_5;
+                    if (current === commonPrefix) {
+                        break;
+                    }
+                }
+            }
+            function getCommonPrefix(directory, resolution) {
+                if (resolution === undefined) {
+                    return undefined;
+                }
+                var resolutionDirectory = ts.toPath(ts.getDirectoryPath(resolution), currentDirectory, getCanonicalFileName);
+                // find first position where directory and resolution differs
+                var i = 0;
+                while (i < Math.min(directory.length, resolutionDirectory.length) && directory.charCodeAt(i) === resolutionDirectory.charCodeAt(i)) {
+                    i++;
+                }
+                // find last directory separator before position i
+                var sep = directory.lastIndexOf(ts.directorySeparator, i);
+                if (sep < 0) {
+                    return undefined;
+                }
+                return directory.substr(0, sep);
             }
-            return parseIdentifier();
         }
-        function parseVariableDeclaration() {
-            var node = createNode(218 /* VariableDeclaration */);
-            node.name = parseIdentifierOrPattern();
-            node.type = parseTypeAnnotation();
-            if (!isInOrOfKeyword(token())) {
-                node.initializer = parseInitializer(/*inParameter*/ false);
+    }
+    ts.createModuleResolutionCache = createModuleResolutionCache;
+    function resolveModuleName(moduleName, containingFile, compilerOptions, host, cache) {
+        var traceEnabled = isTraceEnabled(compilerOptions, host);
+        if (traceEnabled) {
+            trace(host, ts.Diagnostics.Resolving_module_0_from_1, moduleName, containingFile);
+        }
+        var containingDirectory = ts.getDirectoryPath(containingFile);
+        var perFolderCache = cache && cache.getOrCreateCacheForDirectory(containingDirectory);
+        var result = perFolderCache && perFolderCache.get(moduleName);
+        if (result) {
+            if (traceEnabled) {
+                trace(host, ts.Diagnostics.Resolution_for_module_0_was_found_in_cache, moduleName);
             }
-            return finishNode(node);
         }
-        function parseVariableDeclarationList(inForStatementInitializer) {
-            var node = createNode(219 /* VariableDeclarationList */);
-            switch (token()) {
-                case 102 /* VarKeyword */:
-                    break;
-                case 108 /* LetKeyword */:
-                    node.flags |= 1 /* Let */;
+        else {
+            var moduleResolution = compilerOptions.moduleResolution;
+            if (moduleResolution === undefined) {
+                moduleResolution = ts.getEmitModuleKind(compilerOptions) === ts.ModuleKind.CommonJS ? ts.ModuleResolutionKind.NodeJs : ts.ModuleResolutionKind.Classic;
+                if (traceEnabled) {
+                    trace(host, ts.Diagnostics.Module_resolution_kind_is_not_specified_using_0, ts.ModuleResolutionKind[moduleResolution]);
+                }
+            }
+            else {
+                if (traceEnabled) {
+                    trace(host, ts.Diagnostics.Explicitly_specified_module_resolution_kind_Colon_0, ts.ModuleResolutionKind[moduleResolution]);
+                }
+            }
+            switch (moduleResolution) {
+                case ts.ModuleResolutionKind.NodeJs:
+                    result = nodeModuleNameResolver(moduleName, containingFile, compilerOptions, host, cache);
                     break;
-                case 74 /* ConstKeyword */:
-                    node.flags |= 2 /* Const */;
+                case ts.ModuleResolutionKind.Classic:
+                    result = classicNameResolver(moduleName, containingFile, compilerOptions, host, cache);
                     break;
                 default:
-                    ts.Debug.fail();
+                    ts.Debug.fail("Unexpected moduleResolution: " + moduleResolution);
             }
-            nextToken();
-            // The user may have written the following:
-            //
-            //    for (let of X) { }
-            //
-            // In this case, we want to parse an empty declaration list, and then parse 'of'
-            // as a keyword. The reason this is not automatic is that 'of' is a valid identifier.
-            // So we need to look ahead to determine if 'of' should be treated as a keyword in
-            // this context.
-            // The checker will then give an error that there is an empty declaration list.
-            if (token() === 138 /* OfKeyword */ && lookAhead(canFollowContextualOfKeyword)) {
-                node.declarations = createMissingList();
+            if (perFolderCache) {
+                perFolderCache.set(moduleName, result);
+                // put result in per-module name cache
+                var perModuleNameCache = cache.getOrCreateCacheForModuleName(moduleName);
+                if (perModuleNameCache) {
+                    perModuleNameCache.set(containingDirectory, result);
+                }
+            }
+        }
+        if (traceEnabled) {
+            if (result.resolvedModule) {
+                trace(host, ts.Diagnostics.Module_name_0_was_successfully_resolved_to_1, moduleName, result.resolvedModule.resolvedFileName);
             }
             else {
-                var savedDisallowIn = inDisallowInContext();
-                setDisallowInContext(inForStatementInitializer);
-                node.declarations = parseDelimitedList(8 /* VariableDeclarations */, parseVariableDeclaration);
-                setDisallowInContext(savedDisallowIn);
+                trace(host, ts.Diagnostics.Module_name_0_was_not_resolved, moduleName);
             }
-            return finishNode(node);
-        }
-        function canFollowContextualOfKeyword() {
-            return nextTokenIsIdentifier() && nextToken() === 18 /* CloseParenToken */;
-        }
-        function parseVariableStatement(fullStart, decorators, modifiers) {
-            var node = createNode(200 /* VariableStatement */, fullStart);
-            node.decorators = decorators;
-            node.modifiers = modifiers;
-            node.declarationList = parseVariableDeclarationList(/*inForStatementInitializer*/ false);
-            parseSemicolon();
-            return addJSDocComment(finishNode(node));
         }
-        function parseFunctionDeclaration(fullStart, decorators, modifiers) {
-            var node = createNode(220 /* FunctionDeclaration */, fullStart);
-            node.decorators = decorators;
-            node.modifiers = modifiers;
-            parseExpected(87 /* FunctionKeyword */);
-            node.asteriskToken = parseOptionalToken(37 /* AsteriskToken */);
-            node.name = ts.hasModifier(node, 512 /* Default */) ? parseOptionalIdentifier() : parseIdentifier();
-            var isGenerator = !!node.asteriskToken;
-            var isAsync = ts.hasModifier(node, 256 /* Async */);
-            fillSignature(54 /* ColonToken */, /*yieldContext*/ isGenerator, /*awaitContext*/ isAsync, /*requireCompleteParameterList*/ false, node);
-            node.body = parseFunctionBlockOrSemicolon(isGenerator, isAsync, ts.Diagnostics.or_expected);
-            return addJSDocComment(finishNode(node));
+        return result;
+    }
+    ts.resolveModuleName = resolveModuleName;
+    /**
+     * Any module resolution kind can be augmented with optional settings: 'baseUrl', 'paths' and 'rootDirs' - they are used to
+     * mitigate differences between design time structure of the project and its runtime counterpart so the same import name
+     * can be resolved successfully by TypeScript compiler and runtime module loader.
+     * If these settings are set then loading procedure will try to use them to resolve module name and it can of failure it will
+     * fallback to standard resolution routine.
+     *
+     * - baseUrl - this setting controls how non-relative module names are resolved. If this setting is specified then non-relative
+     * names will be resolved relative to baseUrl: i.e. if baseUrl is '/a/b' then candidate location to resolve module name 'c/d' will
+     * be '/a/b/c/d'
+     * - paths - this setting can only be used when baseUrl is specified. allows to tune how non-relative module names
+     * will be resolved based on the content of the module name.
+     * Structure of 'paths' compiler options
+     * 'paths': {
+     *    pattern-1: [...substitutions],
+     *    pattern-2: [...substitutions],
+     *    ...
+     *    pattern-n: [...substitutions]
+     * }
+     * Pattern here is a string that can contain zero or one '*' character. During module resolution module name will be matched against
+     * all patterns in the list. Matching for patterns that don't contain '*' means that module name must be equal to pattern respecting the case.
+     * If pattern contains '*' then to match pattern "<prefix>*<suffix>" module name must start with the <prefix> and end with <suffix>.
+     * <MatchedStar> denotes part of the module name between <prefix> and <suffix>.
+     * If module name can be matches with multiple patterns then pattern with the longest prefix will be picked.
+     * After selecting pattern we'll use list of substitutions to get candidate locations of the module and the try to load module
+     * from the candidate location.
+     * Substitution is a string that can contain zero or one '*'. To get candidate location from substitution we'll pick every
+     * substitution in the list and replace '*' with <MatchedStar> string. If candidate location is not rooted it
+     * will be converted to absolute using baseUrl.
+     * For example:
+     * baseUrl: /a/b/c
+     * "paths": {
+     *     // match all module names
+     *     "*": [
+     *         "*",        // use matched name as is,
+     *                     // <matched name> will be looked as /a/b/c/<matched name>
+     *
+     *         "folder1/*" // substitution will convert matched name to 'folder1/<matched name>',
+     *                     // since it is not rooted then final candidate location will be /a/b/c/folder1/<matched name>
+     *     ],
+     *     // match module names that start with 'components/'
+     *     "components/*": [ "/root/components/*" ] // substitution will convert /components/folder1/<matched name> to '/root/components/folder1/<matched name>',
+     *                                              // it is rooted so it will be final candidate location
+     * }
+     *
+     * 'rootDirs' allows the project to be spreaded across multiple locations and resolve modules with relative names as if
+     * they were in the same location. For example lets say there are two files
+     * '/local/src/content/file1.ts'
+     * '/shared/components/contracts/src/content/protocols/file2.ts'
+     * After bundling content of '/shared/components/contracts/src' will be merged with '/local/src' so
+     * if file1 has the following import 'import {x} from "./protocols/file2"' it will be resolved successfully in runtime.
+     * 'rootDirs' provides the way to tell compiler that in order to get the whole project it should behave as if content of all
+     * root dirs were merged together.
+     * I.e. for the example above 'rootDirs' will have two entries: [ '/local/src', '/shared/components/contracts/src' ].
+     * Compiler will first convert './protocols/file2' into absolute path relative to the location of containing file:
+     * '/local/src/content/protocols/file2' and try to load it - failure.
+     * Then it will search 'rootDirs' looking for a longest matching prefix of this absolute path and if such prefix is found - absolute path will
+     * be converted to a path relative to found rootDir entry './content/protocols/file2' (*). As a last step compiler will check all remaining
+     * entries in 'rootDirs', use them to build absolute path out of (*) and try to resolve module from this location.
+     */
+    function tryLoadModuleUsingOptionalResolutionSettings(extensions, moduleName, containingDirectory, loader, failedLookupLocations, state) {
+        if (moduleHasNonRelativeName(moduleName)) {
+            return tryLoadModuleUsingBaseUrl(extensions, moduleName, loader, failedLookupLocations, state);
         }
-        function parseConstructorDeclaration(pos, decorators, modifiers) {
-            var node = createNode(148 /* Constructor */, pos);
-            node.decorators = decorators;
-            node.modifiers = modifiers;
-            parseExpected(121 /* ConstructorKeyword */);
-            fillSignature(54 /* ColonToken */, /*yieldContext*/ false, /*awaitContext*/ false, /*requireCompleteParameterList*/ false, node);
-            node.body = parseFunctionBlockOrSemicolon(/*isGenerator*/ false, /*isAsync*/ false, ts.Diagnostics.or_expected);
-            return addJSDocComment(finishNode(node));
+        else {
+            return tryLoadModuleUsingRootDirs(extensions, moduleName, containingDirectory, loader, failedLookupLocations, state);
         }
-        function parseMethodDeclaration(fullStart, decorators, modifiers, asteriskToken, name, questionToken, diagnosticMessage) {
-            var method = createNode(147 /* MethodDeclaration */, fullStart);
-            method.decorators = decorators;
-            method.modifiers = modifiers;
-            method.asteriskToken = asteriskToken;
-            method.name = name;
-            method.questionToken = questionToken;
-            var isGenerator = !!asteriskToken;
-            var isAsync = ts.hasModifier(method, 256 /* Async */);
-            fillSignature(54 /* ColonToken */, /*yieldContext*/ isGenerator, /*awaitContext*/ isAsync, /*requireCompleteParameterList*/ false, method);
-            method.body = parseFunctionBlockOrSemicolon(isGenerator, isAsync, diagnosticMessage);
-            return addJSDocComment(finishNode(method));
+    }
+    function tryLoadModuleUsingRootDirs(extensions, moduleName, containingDirectory, loader, failedLookupLocations, state) {
+        if (!state.compilerOptions.rootDirs) {
+            return undefined;
         }
-        function parsePropertyDeclaration(fullStart, decorators, modifiers, name, questionToken) {
-            var property = createNode(145 /* PropertyDeclaration */, fullStart);
-            property.decorators = decorators;
-            property.modifiers = modifiers;
-            property.name = name;
-            property.questionToken = questionToken;
-            property.type = parseTypeAnnotation();
-            // For instance properties specifically, since they are evaluated inside the constructor,
-            // we do *not * want to parse yield expressions, so we specifically turn the yield context
-            // off. The grammar would look something like this:
-            //
-            //    MemberVariableDeclaration[Yield]:
-            //        AccessibilityModifier_opt   PropertyName   TypeAnnotation_opt   Initializer_opt[In];
-            //        AccessibilityModifier_opt  static_opt  PropertyName   TypeAnnotation_opt   Initializer_opt[In, ?Yield];
-            //
-            // The checker may still error in the static case to explicitly disallow the yield expression.
-            property.initializer = ts.hasModifier(property, 32 /* Static */)
-                ? allowInAnd(parseNonParameterInitializer)
-                : doOutsideOfContext(65536 /* YieldContext */ | 32768 /* DisallowInContext */, parseNonParameterInitializer);
-            parseSemicolon();
-            return addJSDocComment(finishNode(property));
+        if (state.traceEnabled) {
+            trace(state.host, ts.Diagnostics.rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0, moduleName);
         }
-        function parsePropertyOrMethodDeclaration(fullStart, decorators, modifiers) {
-            var asteriskToken = parseOptionalToken(37 /* AsteriskToken */);
-            var name = parsePropertyName();
-            // Note: this is not legal as per the grammar.  But we allow it in the parser and
-            // report an error in the grammar checker.
-            var questionToken = parseOptionalToken(53 /* QuestionToken */);
-            if (asteriskToken || token() === 17 /* OpenParenToken */ || token() === 25 /* LessThanToken */) {
-                return parseMethodDeclaration(fullStart, decorators, modifiers, asteriskToken, name, questionToken, ts.Diagnostics.or_expected);
+        var candidate = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
+        var matchedRootDir;
+        var matchedNormalizedPrefix;
+        for (var _i = 0, _a = state.compilerOptions.rootDirs; _i < _a.length; _i++) {
+            var rootDir = _a[_i];
+            // rootDirs are expected to be absolute
+            // in case of tsconfig.json this will happen automatically - compiler will expand relative names
+            // using location of tsconfig.json as base location
+            var normalizedRoot = ts.normalizePath(rootDir);
+            if (!ts.endsWith(normalizedRoot, ts.directorySeparator)) {
+                normalizedRoot += ts.directorySeparator;
             }
-            else {
-                return parsePropertyDeclaration(fullStart, decorators, modifiers, name, questionToken);
+            var isLongestMatchingPrefix = ts.startsWith(candidate, normalizedRoot) &&
+                (matchedNormalizedPrefix === undefined || matchedNormalizedPrefix.length < normalizedRoot.length);
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Checking_if_0_is_the_longest_matching_prefix_for_1_2, normalizedRoot, candidate, isLongestMatchingPrefix);
             }
-        }
-        function parseNonParameterInitializer() {
-            return parseInitializer(/*inParameter*/ false);
-        }
-        function parseAccessorDeclaration(kind, fullStart, decorators, modifiers) {
-            var node = createNode(kind, fullStart);
-            node.decorators = decorators;
-            node.modifiers = modifiers;
-            node.name = parsePropertyName();
-            fillSignature(54 /* ColonToken */, /*yieldContext*/ false, /*awaitContext*/ false, /*requireCompleteParameterList*/ false, node);
-            node.body = parseFunctionBlockOrSemicolon(/*isGenerator*/ false, /*isAsync*/ false);
-            return addJSDocComment(finishNode(node));
-        }
-        function isClassMemberModifier(idToken) {
-            switch (idToken) {
-                case 112 /* PublicKeyword */:
-                case 110 /* PrivateKeyword */:
-                case 111 /* ProtectedKeyword */:
-                case 113 /* StaticKeyword */:
-                case 128 /* ReadonlyKeyword */:
-                    return true;
-                default:
-                    return false;
+            if (isLongestMatchingPrefix) {
+                matchedNormalizedPrefix = normalizedRoot;
+                matchedRootDir = rootDir;
             }
         }
-        function isClassMemberStart() {
-            var idToken;
-            if (token() === 55 /* AtToken */) {
-                return true;
-            }
-            // Eat up all modifiers, but hold on to the last one in case it is actually an identifier.
-            while (ts.isModifierKind(token())) {
-                idToken = token();
-                // If the idToken is a class modifier (protected, private, public, and static), it is
-                // certain that we are starting to parse class member. This allows better error recovery
-                // Example:
-                //      public foo() ...     // true
-                //      public @dec blah ... // true; we will then report an error later
-                //      export public ...    // true; we will then report an error later
-                if (isClassMemberModifier(idToken)) {
-                    return true;
-                }
-                nextToken();
-            }
-            if (token() === 37 /* AsteriskToken */) {
-                return true;
+        if (matchedNormalizedPrefix) {
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Longest_matching_prefix_for_0_is_1, candidate, matchedNormalizedPrefix);
             }
-            // Try to get the first property-like token following all modifiers.
-            // This can either be an identifier or the 'get' or 'set' keywords.
-            if (isLiteralPropertyName()) {
-                idToken = token();
-                nextToken();
+            var suffix = candidate.substr(matchedNormalizedPrefix.length);
+            // first - try to load from a initial location
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Loading_0_from_the_root_dir_1_candidate_location_2, suffix, matchedNormalizedPrefix, candidate);
             }
-            // Index signatures and computed properties are class members; we can parse.
-            if (token() === 19 /* OpenBracketToken */) {
-                return true;
+            var resolvedFileName = loader(extensions, candidate, failedLookupLocations, !directoryProbablyExists(containingDirectory, state.host), state);
+            if (resolvedFileName) {
+                return resolvedFileName;
             }
-            // If we were able to get any potential identifier...
-            if (idToken !== undefined) {
-                // If we have a non-keyword identifier, or if we have an accessor, then it's safe to parse.
-                if (!ts.isKeyword(idToken) || idToken === 131 /* SetKeyword */ || idToken === 123 /* GetKeyword */) {
-                    return true;
-                }
-                // If it *is* a keyword, but not an accessor, check a little farther along
-                // to see if it should actually be parsed as a class member.
-                switch (token()) {
-                    case 17 /* OpenParenToken */: // Method declaration
-                    case 25 /* LessThanToken */: // Generic Method declaration
-                    case 54 /* ColonToken */: // Type Annotation for declaration
-                    case 56 /* EqualsToken */: // Initializer for declaration
-                    case 53 /* QuestionToken */:
-                        return true;
-                    default:
-                        // Covers
-                        //  - Semicolons     (declaration termination)
-                        //  - Closing braces (end-of-class, must be declaration)
-                        //  - End-of-files   (not valid, but permitted so that it gets caught later on)
-                        //  - Line-breaks    (enabling *automatic semicolon insertion*)
-                        return canParseSemicolon();
-                }
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Trying_other_entries_in_rootDirs);
             }
-            return false;
-        }
-        function parseDecorators() {
-            var decorators;
-            while (true) {
-                var decoratorStart = getNodePos();
-                if (!parseOptional(55 /* AtToken */)) {
-                    break;
+            // then try to resolve using remaining entries in rootDirs
+            for (var _b = 0, _c = state.compilerOptions.rootDirs; _b < _c.length; _b++) {
+                var rootDir = _c[_b];
+                if (rootDir === matchedRootDir) {
+                    // skip the initially matched entry
+                    continue;
                 }
-                var decorator = createNode(143 /* Decorator */, decoratorStart);
-                decorator.expression = doInDecoratorContext(parseLeftHandSideExpressionOrHigher);
-                finishNode(decorator);
-                if (!decorators) {
-                    decorators = createNodeArray([decorator], decoratorStart);
+                var candidate_1 = ts.combinePaths(ts.normalizePath(rootDir), suffix);
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.Loading_0_from_the_root_dir_1_candidate_location_2, suffix, rootDir, candidate_1);
                 }
-                else {
-                    decorators.push(decorator);
+                var baseDirectory = ts.getDirectoryPath(candidate_1);
+                var resolvedFileName_1 = loader(extensions, candidate_1, failedLookupLocations, !directoryProbablyExists(baseDirectory, state.host), state);
+                if (resolvedFileName_1) {
+                    return resolvedFileName_1;
                 }
             }
-            if (decorators) {
-                decorators.end = getNodeEnd();
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Module_resolution_using_rootDirs_has_failed);
             }
-            return decorators;
         }
-        /*
-         * There are situations in which a modifier like 'const' will appear unexpectedly, such as on a class member.
-         * In those situations, if we are entirely sure that 'const' is not valid on its own (such as when ASI takes effect
-         * and turns it into a standalone declaration), then it is better to parse it and report an error later.
-         *
-         * In such situations, 'permitInvalidConstAsModifier' should be set to true.
-         */
-        function parseModifiers(permitInvalidConstAsModifier) {
-            var modifiers;
-            while (true) {
-                var modifierStart = scanner.getStartPos();
-                var modifierKind = token();
-                if (token() === 74 /* ConstKeyword */ && permitInvalidConstAsModifier) {
-                    // We need to ensure that any subsequent modifiers appear on the same line
-                    // so that when 'const' is a standalone declaration, we don't issue an error.
-                    if (!tryParse(nextTokenIsOnSameLineAndCanFollowModifier)) {
-                        break;
-                    }
-                }
-                else {
-                    if (!parseAnyContextualModifier()) {
-                        break;
-                    }
+        return undefined;
+    }
+    function tryLoadModuleUsingBaseUrl(extensions, moduleName, loader, failedLookupLocations, state) {
+        if (!state.compilerOptions.baseUrl) {
+            return undefined;
+        }
+        if (state.traceEnabled) {
+            trace(state.host, ts.Diagnostics.baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1, state.compilerOptions.baseUrl, moduleName);
+        }
+        // string is for exact match
+        var matchedPattern = undefined;
+        if (state.compilerOptions.paths) {
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.paths_option_is_specified_looking_for_a_pattern_to_match_module_name_0, moduleName);
+            }
+            matchedPattern = ts.matchPatternOrExact(ts.getOwnKeys(state.compilerOptions.paths), moduleName);
+        }
+        if (matchedPattern) {
+            var matchedStar_1 = typeof matchedPattern === "string" ? undefined : ts.matchedText(matchedPattern, moduleName);
+            var matchedPatternText = typeof matchedPattern === "string" ? matchedPattern : ts.patternText(matchedPattern);
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Module_name_0_matched_pattern_1, moduleName, matchedPatternText);
+            }
+            return ts.forEach(state.compilerOptions.paths[matchedPatternText], function (subst) {
+                var path = matchedStar_1 ? subst.replace("*", matchedStar_1) : subst;
+                var candidate = ts.normalizePath(ts.combinePaths(state.compilerOptions.baseUrl, path));
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.Trying_substitution_0_candidate_module_location_Colon_1, subst, path);
                 }
-                var modifier = finishNode(createNode(modifierKind, modifierStart));
-                if (!modifiers) {
-                    modifiers = createNodeArray([modifier], modifierStart);
+                // A path mapping may have an extension, in contrast to an import, which should omit it.
+                var extension = ts.tryGetExtensionFromPath(candidate);
+                if (extension !== undefined) {
+                    var path_1 = tryFile(candidate, failedLookupLocations, /*onlyRecordFailures*/ false, state);
+                    if (path_1 !== undefined) {
+                        return { path: path_1, extension: extension };
+                    }
                 }
-                else {
-                    modifiers.push(modifier);
+                return loader(extensions, candidate, failedLookupLocations, !directoryProbablyExists(ts.getDirectoryPath(candidate), state.host), state);
+            });
+        }
+        else {
+            var candidate = ts.normalizePath(ts.combinePaths(state.compilerOptions.baseUrl, moduleName));
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Resolving_module_name_0_relative_to_base_url_1_2, moduleName, state.compilerOptions.baseUrl, candidate);
+            }
+            return loader(extensions, candidate, failedLookupLocations, !directoryProbablyExists(ts.getDirectoryPath(candidate), state.host), state);
+        }
+    }
+    function nodeModuleNameResolver(moduleName, containingFile, compilerOptions, host, cache) {
+        return nodeModuleNameResolverWorker(moduleName, ts.getDirectoryPath(containingFile), compilerOptions, host, cache, /*jsOnly*/ false);
+    }
+    ts.nodeModuleNameResolver = nodeModuleNameResolver;
+    /**
+     * Expose resolution logic to allow us to use Node module resolution logic from arbitrary locations.
+     * No way to do this with `require()`: https://github.com/nodejs/node/issues/5963
+     * Throws an error if the module can't be resolved.
+     */
+    /* @internal */
+    function resolveJavaScriptModule(moduleName, initialDir, host) {
+        var _a = nodeModuleNameResolverWorker(moduleName, initialDir, { moduleResolution: ts.ModuleResolutionKind.NodeJs, allowJs: true }, host, /*cache*/ undefined, /*jsOnly*/ true), resolvedModule = _a.resolvedModule, failedLookupLocations = _a.failedLookupLocations;
+        if (!resolvedModule) {
+            throw new Error("Could not resolve JS module " + moduleName + " starting at " + initialDir + ". Looked in: " + failedLookupLocations.join(", "));
+        }
+        return resolvedModule.resolvedFileName;
+    }
+    ts.resolveJavaScriptModule = resolveJavaScriptModule;
+    function nodeModuleNameResolverWorker(moduleName, containingDirectory, compilerOptions, host, cache, jsOnly) {
+        var traceEnabled = isTraceEnabled(compilerOptions, host);
+        var failedLookupLocations = [];
+        var state = { compilerOptions: compilerOptions, host: host, traceEnabled: traceEnabled };
+        var result = jsOnly ? tryResolve(Extensions.JavaScript) : (tryResolve(Extensions.TypeScript) || tryResolve(Extensions.JavaScript));
+        if (result && result.value) {
+            var _a = result.value, resolved = _a.resolved, isExternalLibraryImport = _a.isExternalLibraryImport;
+            return createResolvedModuleWithFailedLookupLocations(resolved, isExternalLibraryImport, failedLookupLocations);
+        }
+        return { resolvedModule: undefined, failedLookupLocations: failedLookupLocations };
+        function tryResolve(extensions) {
+            var loader = function (extensions, candidate, failedLookupLocations, onlyRecordFailures, state) { return nodeLoadModuleByRelativeName(extensions, candidate, failedLookupLocations, onlyRecordFailures, state, /*considerPackageJson*/ true); };
+            var resolved = tryLoadModuleUsingOptionalResolutionSettings(extensions, moduleName, containingDirectory, loader, failedLookupLocations, state);
+            if (resolved) {
+                return toSearchResult({ resolved: resolved, isExternalLibraryImport: false });
+            }
+            if (moduleHasNonRelativeName(moduleName)) {
+                if (traceEnabled) {
+                    trace(host, ts.Diagnostics.Loading_module_0_from_node_modules_folder_target_file_type_1, moduleName, Extensions[extensions]);
                 }
+                var resolved_1 = loadModuleFromNodeModules(extensions, moduleName, containingDirectory, failedLookupLocations, state, cache);
+                // For node_modules lookups, get the real path so that multiple accesses to an `npm link`-ed module do not create duplicate files.
+                return resolved_1 && { value: resolved_1.value && { resolved: { path: realpath(resolved_1.value.path, host, traceEnabled), extension: resolved_1.value.extension }, isExternalLibraryImport: true } };
             }
-            if (modifiers) {
-                modifiers.end = scanner.getStartPos();
+            else {
+                var candidate = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
+                var resolved_2 = nodeLoadModuleByRelativeName(extensions, candidate, failedLookupLocations, /*onlyRecordFailures*/ false, state, /*considerPackageJson*/ true);
+                return resolved_2 && toSearchResult({ resolved: resolved_2, isExternalLibraryImport: false });
             }
-            return modifiers;
         }
-        function parseModifiersForArrowFunction() {
-            var modifiers;
-            if (token() === 118 /* AsyncKeyword */) {
-                var modifierStart = scanner.getStartPos();
-                var modifierKind = token();
-                nextToken();
-                var modifier = finishNode(createNode(modifierKind, modifierStart));
-                modifiers = createNodeArray([modifier], modifierStart);
-                modifiers.end = scanner.getStartPos();
-            }
-            return modifiers;
+    }
+    function realpath(path, host, traceEnabled) {
+        if (!host.realpath) {
+            return path;
         }
-        function parseClassElement() {
-            if (token() === 23 /* SemicolonToken */) {
-                var result = createNode(198 /* SemicolonClassElement */);
-                nextToken();
-                return finishNode(result);
-            }
-            var fullStart = getNodePos();
-            var decorators = parseDecorators();
-            var modifiers = parseModifiers(/*permitInvalidConstAsModifier*/ true);
-            var accessor = tryParseAccessorDeclaration(fullStart, decorators, modifiers);
-            if (accessor) {
-                return accessor;
+        var real = ts.normalizePath(host.realpath(path));
+        if (traceEnabled) {
+            trace(host, ts.Diagnostics.Resolving_real_path_for_0_result_1, path, real);
+        }
+        return real;
+    }
+    function nodeLoadModuleByRelativeName(extensions, candidate, failedLookupLocations, onlyRecordFailures, state, considerPackageJson) {
+        if (state.traceEnabled) {
+            trace(state.host, ts.Diagnostics.Loading_module_as_file_Slash_folder_candidate_module_location_0_target_file_type_1, candidate, Extensions[extensions]);
+        }
+        if (!ts.pathEndsWithDirectorySeparator(candidate)) {
+            if (!onlyRecordFailures) {
+                var parentOfCandidate = ts.getDirectoryPath(candidate);
+                if (!directoryProbablyExists(parentOfCandidate, state.host)) {
+                    if (state.traceEnabled) {
+                        trace(state.host, ts.Diagnostics.Directory_0_does_not_exist_skipping_all_lookups_in_it, parentOfCandidate);
+                    }
+                    onlyRecordFailures = true;
+                }
             }
-            if (token() === 121 /* ConstructorKeyword */) {
-                return parseConstructorDeclaration(fullStart, decorators, modifiers);
+            var resolvedFromFile = loadModuleFromFile(extensions, candidate, failedLookupLocations, onlyRecordFailures, state);
+            if (resolvedFromFile) {
+                return resolvedFromFile;
             }
-            if (isIndexSignature()) {
-                return parseIndexSignatureDeclaration(fullStart, decorators, modifiers);
+        }
+        if (!onlyRecordFailures) {
+            var candidateExists = directoryProbablyExists(candidate, state.host);
+            if (!candidateExists) {
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.Directory_0_does_not_exist_skipping_all_lookups_in_it, candidate);
+                }
+                onlyRecordFailures = true;
             }
-            // It is very important that we check this *after* checking indexers because
-            // the [ token can start an index signature or a computed property name
-            if (ts.tokenIsIdentifierOrKeyword(token()) ||
-                token() === 9 /* StringLiteral */ ||
-                token() === 8 /* NumericLiteral */ ||
-                token() === 37 /* AsteriskToken */ ||
-                token() === 19 /* OpenBracketToken */) {
-                return parsePropertyOrMethodDeclaration(fullStart, decorators, modifiers);
+        }
+        return loadNodeModuleFromDirectory(extensions, candidate, failedLookupLocations, onlyRecordFailures, state, considerPackageJson);
+    }
+    /* @internal */
+    function directoryProbablyExists(directoryName, host) {
+        // if host does not support 'directoryExists' assume that directory will exist
+        return !host.directoryExists || host.directoryExists(directoryName);
+    }
+    ts.directoryProbablyExists = directoryProbablyExists;
+    /**
+     * @param {boolean} onlyRecordFailures - if true then function won't try to actually load files but instead record all attempts as failures. This flag is necessary
+     * in cases when we know upfront that all load attempts will fail (because containing folder does not exists) however we still need to record all failed lookup locations.
+     */
+    function loadModuleFromFile(extensions, candidate, failedLookupLocations, onlyRecordFailures, state) {
+        // First, try adding an extension. An import of "foo" could be matched by a file "foo.ts", or "foo.js" by "foo.js.ts"
+        var resolvedByAddingExtension = tryAddingExtensions(candidate, extensions, failedLookupLocations, onlyRecordFailures, state);
+        if (resolvedByAddingExtension) {
+            return resolvedByAddingExtension;
+        }
+        // If that didn't work, try stripping a ".js" or ".jsx" extension and replacing it with a TypeScript one;
+        // e.g. "./foo.js" can be matched by "./foo.ts" or "./foo.d.ts"
+        if (ts.hasJavaScriptFileExtension(candidate)) {
+            var extensionless = ts.removeFileExtension(candidate);
+            if (state.traceEnabled) {
+                var extension = candidate.substring(extensionless.length);
+                trace(state.host, ts.Diagnostics.File_name_0_has_a_1_extension_stripping_it, candidate, extension);
             }
-            if (decorators || modifiers) {
-                // treat this as a property declaration with a missing name.
-                var name_10 = createMissingNode(69 /* Identifier */, /*reportAtCurrentPosition*/ true, ts.Diagnostics.Declaration_expected);
-                return parsePropertyDeclaration(fullStart, decorators, modifiers, name_10, /*questionToken*/ undefined);
+            return tryAddingExtensions(extensionless, extensions, failedLookupLocations, onlyRecordFailures, state);
+        }
+    }
+    /** Try to return an existing file that adds one of the `extensions` to `candidate`. */
+    function tryAddingExtensions(candidate, extensions, failedLookupLocations, onlyRecordFailures, state) {
+        if (!onlyRecordFailures) {
+            // check if containing folder exists - if it doesn't then just record failures for all supported extensions without disk probing
+            var directory = ts.getDirectoryPath(candidate);
+            if (directory) {
+                onlyRecordFailures = !directoryProbablyExists(directory, state.host);
             }
-            // 'isClassMemberStart' should have hinted not to attempt parsing.
-            ts.Debug.fail("Should not have attempted to parse class member declaration.");
         }
-        function parseClassExpression() {
-            return parseClassDeclarationOrExpression(
-            /*fullStart*/ scanner.getStartPos(), 
-            /*decorators*/ undefined, 
-            /*modifiers*/ undefined, 192 /* ClassExpression */);
+        switch (extensions) {
+            case Extensions.DtsOnly:
+                return tryExtension(".d.ts" /* Dts */);
+            case Extensions.TypeScript:
+                return tryExtension(".ts" /* Ts */) || tryExtension(".tsx" /* Tsx */) || tryExtension(".d.ts" /* Dts */);
+            case Extensions.JavaScript:
+                return tryExtension(".js" /* Js */) || tryExtension(".jsx" /* Jsx */);
         }
-        function parseClassDeclaration(fullStart, decorators, modifiers) {
-            return parseClassDeclarationOrExpression(fullStart, decorators, modifiers, 221 /* ClassDeclaration */);
+        function tryExtension(extension) {
+            var path = tryFile(candidate + extension, failedLookupLocations, onlyRecordFailures, state);
+            return path && { path: path, extension: extension };
         }
-        function parseClassDeclarationOrExpression(fullStart, decorators, modifiers, kind) {
-            var node = createNode(kind, fullStart);
-            node.decorators = decorators;
-            node.modifiers = modifiers;
-            parseExpected(73 /* ClassKeyword */);
-            node.name = parseNameOfClassDeclarationOrExpression();
-            node.typeParameters = parseTypeParameters();
-            node.heritageClauses = parseHeritageClauses(/*isClassHeritageClause*/ true);
-            if (parseExpected(15 /* OpenBraceToken */)) {
-                // ClassTail[Yield,Await] : (Modified) See 14.5
-                //      ClassHeritage[?Yield,?Await]opt { ClassBody[?Yield,?Await]opt }
-                node.members = parseClassMembers();
-                parseExpected(16 /* CloseBraceToken */);
+    }
+    /** Return the file if it exists. */
+    function tryFile(fileName, failedLookupLocations, onlyRecordFailures, state) {
+        if (!onlyRecordFailures) {
+            if (state.host.fileExists(fileName)) {
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.File_0_exist_use_it_as_a_name_resolution_result, fileName);
+                }
+                return fileName;
             }
             else {
-                node.members = createMissingList();
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.File_0_does_not_exist, fileName);
+                }
             }
-            return addJSDocComment(finishNode(node));
         }
-        function parseNameOfClassDeclarationOrExpression() {
-            // implements is a future reserved word so
-            // 'class implements' might mean either
-            // - class expression with omitted name, 'implements' starts heritage clause
-            // - class with name 'implements'
-            // 'isImplementsClause' helps to disambiguate between these two cases
-            return isIdentifier() && !isImplementsClause()
-                ? parseIdentifier()
-                : undefined;
+        failedLookupLocations.push(fileName);
+        return undefined;
+    }
+    function loadNodeModuleFromDirectory(extensions, candidate, failedLookupLocations, onlyRecordFailures, state, considerPackageJson) {
+        if (considerPackageJson === void 0) { considerPackageJson = true; }
+        var directoryExists = !onlyRecordFailures && directoryProbablyExists(candidate, state.host);
+        if (considerPackageJson) {
+            var packageJsonPath = pathToPackageJson(candidate);
+            if (directoryExists && state.host.fileExists(packageJsonPath)) {
+                var fromPackageJson = loadModuleFromPackageJson(packageJsonPath, extensions, candidate, failedLookupLocations, state);
+                if (fromPackageJson) {
+                    return fromPackageJson;
+                }
+            }
+            else {
+                if (directoryExists && state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.File_0_does_not_exist, packageJsonPath);
+                }
+                // record package json as one of failed lookup locations - in the future if this file will appear it will invalidate resolution results
+                failedLookupLocations.push(packageJsonPath);
+            }
         }
-        function isImplementsClause() {
-            return token() === 106 /* ImplementsKeyword */ && lookAhead(nextTokenIsIdentifierOrKeyword);
+        return loadModuleFromFile(extensions, ts.combinePaths(candidate, "index"), failedLookupLocations, !directoryExists, state);
+    }
+    function loadModuleFromPackageJson(packageJsonPath, extensions, candidate, failedLookupLocations, state) {
+        if (state.traceEnabled) {
+            trace(state.host, ts.Diagnostics.Found_package_json_at_0, packageJsonPath);
         }
-        function parseHeritageClauses(isClassHeritageClause) {
-            // ClassTail[Yield,Await] : (Modified) See 14.5
-            //      ClassHeritage[?Yield,?Await]opt { ClassBody[?Yield,?Await]opt }
-            if (isHeritageClause()) {
-                return parseList(20 /* HeritageClauses */, parseHeritageClause);
-            }
+        var file = tryReadPackageJsonFields(extensions !== Extensions.JavaScript, packageJsonPath, candidate, state);
+        if (!file) {
             return undefined;
         }
-        function parseHeritageClause() {
-            if (token() === 83 /* ExtendsKeyword */ || token() === 106 /* ImplementsKeyword */) {
-                var node = createNode(251 /* HeritageClause */);
-                node.token = token();
-                nextToken();
-                node.types = parseDelimitedList(7 /* HeritageClauseElement */, parseExpressionWithTypeArguments);
-                return finishNode(node);
+        var onlyRecordFailures = !directoryProbablyExists(ts.getDirectoryPath(file), state.host);
+        var fromFile = tryFile(file, failedLookupLocations, onlyRecordFailures, state);
+        if (fromFile) {
+            var resolved = fromFile && resolvedIfExtensionMatches(extensions, fromFile);
+            if (resolved) {
+                return resolved;
             }
-            return undefined;
-        }
-        function parseExpressionWithTypeArguments() {
-            var node = createNode(194 /* ExpressionWithTypeArguments */);
-            node.expression = parseLeftHandSideExpressionOrHigher();
-            if (token() === 25 /* LessThanToken */) {
-                node.typeArguments = parseBracketedList(18 /* TypeArguments */, parseType, 25 /* LessThanToken */, 27 /* GreaterThanToken */);
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.File_0_has_an_unsupported_extension_so_skipping_it, fromFile);
             }
-            return finishNode(node);
         }
-        function isHeritageClause() {
-            return token() === 83 /* ExtendsKeyword */ || token() === 106 /* ImplementsKeyword */;
-        }
-        function parseClassMembers() {
-            return parseList(5 /* ClassMembers */, parseClassElement);
+        // Even if extensions is DtsOnly, we can still look up a .ts file as a result of package.json "types"
+        var nextExtensions = extensions === Extensions.DtsOnly ? Extensions.TypeScript : extensions;
+        // Don't do package.json lookup recursively, because Node.js' package lookup doesn't.
+        return nodeLoadModuleByRelativeName(nextExtensions, file, failedLookupLocations, onlyRecordFailures, state, /*considerPackageJson*/ false);
+    }
+    /** Resolve from an arbitrarily specified file. Return `undefined` if it has an unsupported extension. */
+    function resolvedIfExtensionMatches(extensions, path) {
+        var extension = ts.tryGetExtensionFromPath(path);
+        return extension !== undefined && extensionIsOk(extensions, extension) ? { path: path, extension: extension } : undefined;
+    }
+    /** True if `extension` is one of the supported `extensions`. */
+    function extensionIsOk(extensions, extension) {
+        switch (extensions) {
+            case Extensions.JavaScript:
+                return extension === ".js" /* Js */ || extension === ".jsx" /* Jsx */;
+            case Extensions.TypeScript:
+                return extension === ".ts" /* Ts */ || extension === ".tsx" /* Tsx */ || extension === ".d.ts" /* Dts */;
+            case Extensions.DtsOnly:
+                return extension === ".d.ts" /* Dts */;
         }
-        function parseInterfaceDeclaration(fullStart, decorators, modifiers) {
-            var node = createNode(222 /* InterfaceDeclaration */, fullStart);
-            node.decorators = decorators;
-            node.modifiers = modifiers;
-            parseExpected(107 /* InterfaceKeyword */);
-            node.name = parseIdentifier();
-            node.typeParameters = parseTypeParameters();
-            node.heritageClauses = parseHeritageClauses(/*isClassHeritageClause*/ false);
-            node.members = parseObjectTypeMembers();
-            return addJSDocComment(finishNode(node));
+    }
+    function pathToPackageJson(directory) {
+        return ts.combinePaths(directory, "package.json");
+    }
+    function loadModuleFromNodeModulesFolder(extensions, moduleName, nodeModulesFolder, nodeModulesFolderExists, failedLookupLocations, state) {
+        var candidate = ts.normalizePath(ts.combinePaths(nodeModulesFolder, moduleName));
+        return loadModuleFromFile(extensions, candidate, failedLookupLocations, !nodeModulesFolderExists, state) ||
+            loadNodeModuleFromDirectory(extensions, candidate, failedLookupLocations, !nodeModulesFolderExists, state);
+    }
+    function loadModuleFromNodeModules(extensions, moduleName, directory, failedLookupLocations, state, cache) {
+        return loadModuleFromNodeModulesWorker(extensions, moduleName, directory, failedLookupLocations, state, /*typesOnly*/ false, cache);
+    }
+    function loadModuleFromNodeModulesAtTypes(moduleName, directory, failedLookupLocations, state) {
+        // Extensions parameter here doesn't actually matter, because typesOnly ensures we're just doing @types lookup, which is always DtsOnly.
+        return loadModuleFromNodeModulesWorker(Extensions.DtsOnly, moduleName, directory, failedLookupLocations, state, /*typesOnly*/ true, /*cache*/ undefined);
+    }
+    function loadModuleFromNodeModulesWorker(extensions, moduleName, directory, failedLookupLocations, state, typesOnly, cache) {
+        var perModuleNameCache = cache && cache.getOrCreateCacheForModuleName(moduleName);
+        return forEachAncestorDirectory(ts.normalizeSlashes(directory), function (ancestorDirectory) {
+            if (ts.getBaseFileName(ancestorDirectory) !== "node_modules") {
+                var resolutionFromCache = tryFindNonRelativeModuleNameInCache(perModuleNameCache, moduleName, ancestorDirectory, state.traceEnabled, state.host);
+                if (resolutionFromCache) {
+                    return resolutionFromCache;
+                }
+                return toSearchResult(loadModuleFromNodeModulesOneLevel(extensions, moduleName, ancestorDirectory, failedLookupLocations, state, typesOnly));
+            }
+        });
+    }
+    /** Load a module from a single node_modules directory, but not from any ancestors' node_modules directories. */
+    function loadModuleFromNodeModulesOneLevel(extensions, moduleName, directory, failedLookupLocations, state, typesOnly) {
+        if (typesOnly === void 0) { typesOnly = false; }
+        var nodeModulesFolder = ts.combinePaths(directory, "node_modules");
+        var nodeModulesFolderExists = directoryProbablyExists(nodeModulesFolder, state.host);
+        if (!nodeModulesFolderExists && state.traceEnabled) {
+            trace(state.host, ts.Diagnostics.Directory_0_does_not_exist_skipping_all_lookups_in_it, nodeModulesFolder);
         }
-        function parseTypeAliasDeclaration(fullStart, decorators, modifiers) {
-            var node = createNode(223 /* TypeAliasDeclaration */, fullStart);
-            node.decorators = decorators;
-            node.modifiers = modifiers;
-            parseExpected(134 /* TypeKeyword */);
-            node.name = parseIdentifier();
-            node.typeParameters = parseTypeParameters();
-            parseExpected(56 /* EqualsToken */);
-            node.type = parseType();
-            parseSemicolon();
-            return finishNode(node);
+        var packageResult = typesOnly ? undefined : loadModuleFromNodeModulesFolder(extensions, moduleName, nodeModulesFolder, nodeModulesFolderExists, failedLookupLocations, state);
+        if (packageResult) {
+            return packageResult;
         }
-        // In an ambient declaration, the grammar only allows integer literals as initializers.
-        // In a non-ambient declaration, the grammar allows uninitialized members only in a
-        // ConstantEnumMemberSection, which starts at the beginning of an enum declaration
-        // or any time an integer literal initializer is encountered.
-        function parseEnumMember() {
-            var node = createNode(255 /* EnumMember */, scanner.getStartPos());
-            node.name = parsePropertyName();
-            node.initializer = allowInAnd(parseNonParameterInitializer);
-            return addJSDocComment(finishNode(node));
+        if (extensions !== Extensions.JavaScript) {
+            var nodeModulesAtTypes_1 = ts.combinePaths(nodeModulesFolder, "@types");
+            var nodeModulesAtTypesExists = nodeModulesFolderExists;
+            if (nodeModulesFolderExists && !directoryProbablyExists(nodeModulesAtTypes_1, state.host)) {
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.Directory_0_does_not_exist_skipping_all_lookups_in_it, nodeModulesAtTypes_1);
+                }
+                nodeModulesAtTypesExists = false;
+            }
+            return loadModuleFromNodeModulesFolder(Extensions.DtsOnly, mangleScopedPackage(moduleName, state), nodeModulesAtTypes_1, nodeModulesAtTypesExists, failedLookupLocations, state);
         }
-        function parseEnumDeclaration(fullStart, decorators, modifiers) {
-            var node = createNode(224 /* EnumDeclaration */, fullStart);
-            node.decorators = decorators;
-            node.modifiers = modifiers;
-            parseExpected(81 /* EnumKeyword */);
-            node.name = parseIdentifier();
-            if (parseExpected(15 /* OpenBraceToken */)) {
-                node.members = parseDelimitedList(6 /* EnumMembers */, parseEnumMember);
-                parseExpected(16 /* CloseBraceToken */);
+    }
+    /** Double underscores are used in DefinitelyTyped to delimit scoped packages. */
+    var mangledScopedPackageSeparator = "__";
+    /** For a scoped package, we must look in `@types/foo__bar` instead of `@types/@foo/bar`. */
+    function mangleScopedPackage(moduleName, state) {
+        if (ts.startsWith(moduleName, "@")) {
+            var replaceSlash = moduleName.replace(ts.directorySeparator, mangledScopedPackageSeparator);
+            if (replaceSlash !== moduleName) {
+                var mangled = replaceSlash.slice(1); // Take off the "@"
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.Scoped_package_detected_looking_in_0, mangled);
+                }
+                return mangled;
             }
-            else {
-                node.members = createMissingList();
+        }
+        return moduleName;
+    }
+    /* @internal */
+    function getPackageNameFromAtTypesDirectory(mangledName) {
+        var withoutAtTypePrefix = ts.removePrefix(mangledName, "@types/");
+        if (withoutAtTypePrefix !== mangledName) {
+            return withoutAtTypePrefix.indexOf("__") !== -1 ?
+                "@" + withoutAtTypePrefix.replace(mangledScopedPackageSeparator, ts.directorySeparator) :
+                withoutAtTypePrefix;
+        }
+        return mangledName;
+    }
+    ts.getPackageNameFromAtTypesDirectory = getPackageNameFromAtTypesDirectory;
+    function tryFindNonRelativeModuleNameInCache(cache, moduleName, containingDirectory, traceEnabled, host) {
+        var result = cache && cache.get(containingDirectory);
+        if (result) {
+            if (traceEnabled) {
+                trace(host, ts.Diagnostics.Resolution_for_module_0_was_found_in_cache, moduleName);
             }
-            return addJSDocComment(finishNode(node));
+            return { value: result.resolvedModule && { path: result.resolvedModule.resolvedFileName, extension: result.resolvedModule.extension } };
         }
-        function parseModuleBlock() {
-            var node = createNode(226 /* ModuleBlock */, scanner.getStartPos());
-            if (parseExpected(15 /* OpenBraceToken */)) {
-                node.statements = parseList(1 /* BlockStatements */, parseStatement);
-                parseExpected(16 /* CloseBraceToken */);
+    }
+    function classicNameResolver(moduleName, containingFile, compilerOptions, host, cache) {
+        var traceEnabled = isTraceEnabled(compilerOptions, host);
+        var state = { compilerOptions: compilerOptions, host: host, traceEnabled: traceEnabled };
+        var failedLookupLocations = [];
+        var containingDirectory = ts.getDirectoryPath(containingFile);
+        var resolved = tryResolve(Extensions.TypeScript) || tryResolve(Extensions.JavaScript);
+        return createResolvedModuleWithFailedLookupLocations(resolved && resolved.value, /*isExternalLibraryImport*/ false, failedLookupLocations);
+        function tryResolve(extensions) {
+            var resolvedUsingSettings = tryLoadModuleUsingOptionalResolutionSettings(extensions, moduleName, containingDirectory, loadModuleFromFile, failedLookupLocations, state);
+            if (resolvedUsingSettings) {
+                return { value: resolvedUsingSettings };
+            }
+            var perModuleNameCache = cache && cache.getOrCreateCacheForModuleName(moduleName);
+            if (moduleHasNonRelativeName(moduleName)) {
+                // Climb up parent directories looking for a module.
+                var resolved_3 = forEachAncestorDirectory(containingDirectory, function (directory) {
+                    var resolutionFromCache = tryFindNonRelativeModuleNameInCache(perModuleNameCache, moduleName, directory, traceEnabled, host);
+                    if (resolutionFromCache) {
+                        return resolutionFromCache;
+                    }
+                    var searchName = ts.normalizePath(ts.combinePaths(directory, moduleName));
+                    return toSearchResult(loadModuleFromFile(extensions, searchName, failedLookupLocations, /*onlyRecordFailures*/ false, state));
+                });
+                if (resolved_3) {
+                    return resolved_3;
+                }
+                if (extensions === Extensions.TypeScript) {
+                    // If we didn't find the file normally, look it up in @types.
+                    return loadModuleFromNodeModulesAtTypes(moduleName, containingDirectory, failedLookupLocations, state);
+                }
             }
             else {
-                node.statements = createMissingList();
+                var candidate = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
+                return toSearchResult(loadModuleFromFile(extensions, candidate, failedLookupLocations, /*onlyRecordFailures*/ false, state));
             }
-            return finishNode(node);
         }
-        function parseModuleOrNamespaceDeclaration(fullStart, decorators, modifiers, flags) {
-            var node = createNode(225 /* ModuleDeclaration */, fullStart);
-            // If we are parsing a dotted namespace name, we want to
-            // propagate the 'Namespace' flag across the names if set.
-            var namespaceFlag = flags & 16 /* Namespace */;
-            node.decorators = decorators;
-            node.modifiers = modifiers;
-            node.flags |= flags;
-            node.name = parseIdentifier();
-            node.body = parseOptional(21 /* DotToken */)
-                ? parseModuleOrNamespaceDeclaration(getNodePos(), /*decorators*/ undefined, /*modifiers*/ undefined, 4 /* NestedNamespace */ | namespaceFlag)
-                : parseModuleBlock();
-            return addJSDocComment(finishNode(node));
+    }
+    ts.classicNameResolver = classicNameResolver;
+    /**
+     * LSHost may load a module from a global cache of typings.
+     * This is the minumum code needed to expose that functionality; the rest is in LSHost.
+     */
+    /* @internal */
+    function loadModuleFromGlobalCache(moduleName, projectName, compilerOptions, host, globalCache) {
+        var traceEnabled = isTraceEnabled(compilerOptions, host);
+        if (traceEnabled) {
+            trace(host, ts.Diagnostics.Auto_discovery_for_typings_is_enabled_in_project_0_Running_extra_resolution_pass_for_module_1_using_cache_location_2, projectName, moduleName, globalCache);
         }
-        function parseAmbientExternalModuleDeclaration(fullStart, decorators, modifiers) {
-            var node = createNode(225 /* ModuleDeclaration */, fullStart);
-            node.decorators = decorators;
-            node.modifiers = modifiers;
-            if (token() === 137 /* GlobalKeyword */) {
-                // parse 'global' as name of global scope augmentation
-                node.name = parseIdentifier();
-                node.flags |= 512 /* GlobalAugmentation */;
-            }
-            else {
-                node.name = parseLiteralNode(/*internName*/ true);
-            }
-            if (token() === 15 /* OpenBraceToken */) {
-                node.body = parseModuleBlock();
+        var state = { compilerOptions: compilerOptions, host: host, traceEnabled: traceEnabled };
+        var failedLookupLocations = [];
+        var resolved = loadModuleFromNodeModulesOneLevel(Extensions.DtsOnly, moduleName, globalCache, failedLookupLocations, state);
+        return createResolvedModuleWithFailedLookupLocations(resolved, /*isExternalLibraryImport*/ true, failedLookupLocations);
+    }
+    ts.loadModuleFromGlobalCache = loadModuleFromGlobalCache;
+    /**
+     * Wraps value to SearchResult.
+     * @returns undefined if value is undefined or { value } otherwise
+     */
+    function toSearchResult(value) {
+        return value !== undefined ? { value: value } : undefined;
+    }
+    /** Calls `callback` on `directory` and every ancestor directory it has, returning the first defined result. */
+    function forEachAncestorDirectory(directory, callback) {
+        while (true) {
+            var result = callback(directory);
+            if (result !== undefined) {
+                return result;
             }
-            else {
-                parseSemicolon();
+            var parentPath = ts.getDirectoryPath(directory);
+            if (parentPath === directory) {
+                return undefined;
             }
-            return finishNode(node);
+            directory = parentPath;
         }
-        function parseModuleDeclaration(fullStart, decorators, modifiers) {
-            var flags = 0;
-            if (token() === 137 /* GlobalKeyword */) {
-                // global augmentation
-                return parseAmbientExternalModuleDeclaration(fullStart, decorators, modifiers);
-            }
-            else if (parseOptional(126 /* NamespaceKeyword */)) {
-                flags |= 16 /* Namespace */;
-            }
-            else {
-                parseExpected(125 /* ModuleKeyword */);
-                if (token() === 9 /* StringLiteral */) {
-                    return parseAmbientExternalModuleDeclaration(fullStart, decorators, modifiers);
+    }
+})(ts || (ts = {}));
+/// <reference path="moduleNameResolver.ts"/>
+/// <reference path="binder.ts"/>
+/* @internal */
+var ts;
+(function (ts) {
+    var ambientModuleSymbolRegex = /^".+"$/;
+    var nextSymbolId = 1;
+    var nextNodeId = 1;
+    var nextMergeId = 1;
+    var nextFlowId = 1;
+    function getNodeId(node) {
+        if (!node.id) {
+            node.id = nextNodeId;
+            nextNodeId++;
+        }
+        return node.id;
+    }
+    ts.getNodeId = getNodeId;
+    function getSymbolId(symbol) {
+        if (!symbol.id) {
+            symbol.id = nextSymbolId;
+            nextSymbolId++;
+        }
+        return symbol.id;
+    }
+    ts.getSymbolId = getSymbolId;
+    function isInstantiatedModule(node, preserveConstEnums) {
+        var moduleState = ts.getModuleInstanceState(node);
+        return moduleState === 1 /* Instantiated */ ||
+            (preserveConstEnums && moduleState === 2 /* ConstEnumOnly */);
+    }
+    ts.isInstantiatedModule = isInstantiatedModule;
+    function createTypeChecker(host, produceDiagnostics) {
+        // Cancellation that controls whether or not we can cancel in the middle of type checking.
+        // In general cancelling is *not* safe for the type checker.  We might be in the middle of
+        // computing something, and we will leave our internals in an inconsistent state.  Callers
+        // who set the cancellation token should catch if a cancellation exception occurs, and
+        // should throw away and create a new TypeChecker.
+        //
+        // Currently we only support setting the cancellation token when getting diagnostics.  This
+        // is because diagnostics can be quite expensive, and we want to allow hosts to bail out if
+        // they no longer need the information (for example, if the user started editing again).
+        var cancellationToken;
+        var requestedExternalEmitHelpers;
+        var externalHelpersModule;
+        var Symbol = ts.objectAllocator.getSymbolConstructor();
+        var Type = ts.objectAllocator.getTypeConstructor();
+        var Signature = ts.objectAllocator.getSignatureConstructor();
+        var typeCount = 0;
+        var symbolCount = 0;
+        var enumCount = 0;
+        var symbolInstantiationDepth = 0;
+        var emptyArray = [];
+        var emptySymbols = ts.createMap();
+        var compilerOptions = host.getCompilerOptions();
+        var languageVersion = ts.getEmitScriptTarget(compilerOptions);
+        var modulekind = ts.getEmitModuleKind(compilerOptions);
+        var noUnusedIdentifiers = !!compilerOptions.noUnusedLocals || !!compilerOptions.noUnusedParameters;
+        var allowSyntheticDefaultImports = typeof compilerOptions.allowSyntheticDefaultImports !== "undefined" ? compilerOptions.allowSyntheticDefaultImports : modulekind === ts.ModuleKind.System;
+        var strictNullChecks = compilerOptions.strictNullChecks === undefined ? compilerOptions.strict : compilerOptions.strictNullChecks;
+        var noImplicitAny = compilerOptions.noImplicitAny === undefined ? compilerOptions.strict : compilerOptions.noImplicitAny;
+        var noImplicitThis = compilerOptions.noImplicitThis === undefined ? compilerOptions.strict : compilerOptions.noImplicitThis;
+        var emitResolver = createResolver();
+        var nodeBuilder = createNodeBuilder();
+        var undefinedSymbol = createSymbol(4 /* Property */, "undefined");
+        undefinedSymbol.declarations = [];
+        var argumentsSymbol = createSymbol(4 /* Property */, "arguments");
+        // for public members that accept a Node or one of its subtypes, we must guard against
+        // synthetic nodes created during transformations by calling `getParseTreeNode`.
+        // for most of these, we perform the guard only on `checker` to avoid any possible
+        // extra cost of calling `getParseTreeNode` when calling these functions from inside the
+        // checker.
+        var checker = {
+            getNodeCount: function () { return ts.sum(host.getSourceFiles(), "nodeCount"); },
+            getIdentifierCount: function () { return ts.sum(host.getSourceFiles(), "identifierCount"); },
+            getSymbolCount: function () { return ts.sum(host.getSourceFiles(), "symbolCount") + symbolCount; },
+            getTypeCount: function () { return typeCount; },
+            isUndefinedSymbol: function (symbol) { return symbol === undefinedSymbol; },
+            isArgumentsSymbol: function (symbol) { return symbol === argumentsSymbol; },
+            isUnknownSymbol: function (symbol) { return symbol === unknownSymbol; },
+            getMergedSymbol: getMergedSymbol,
+            getDiagnostics: getDiagnostics,
+            getGlobalDiagnostics: getGlobalDiagnostics,
+            getTypeOfSymbolAtLocation: function (symbol, location) {
+                location = ts.getParseTreeNode(location);
+                return location ? getTypeOfSymbolAtLocation(symbol, location) : unknownType;
+            },
+            getSymbolsOfParameterPropertyDeclaration: function (parameter, parameterName) {
+                parameter = ts.getParseTreeNode(parameter, ts.isParameter);
+                ts.Debug.assert(parameter !== undefined, "Cannot get symbols of a synthetic parameter that cannot be resolved to a parse-tree node.");
+                return getSymbolsOfParameterPropertyDeclaration(parameter, parameterName);
+            },
+            getDeclaredTypeOfSymbol: getDeclaredTypeOfSymbol,
+            getPropertiesOfType: getPropertiesOfType,
+            getPropertyOfType: getPropertyOfType,
+            getIndexInfoOfType: getIndexInfoOfType,
+            getSignaturesOfType: getSignaturesOfType,
+            getIndexTypeOfType: getIndexTypeOfType,
+            getBaseTypes: getBaseTypes,
+            getBaseTypeOfLiteralType: getBaseTypeOfLiteralType,
+            getWidenedType: getWidenedType,
+            getTypeFromTypeNode: function (node) {
+                node = ts.getParseTreeNode(node, ts.isTypeNode);
+                return node ? getTypeFromTypeNode(node) : unknownType;
+            },
+            getParameterType: getTypeAtPosition,
+            getReturnTypeOfSignature: getReturnTypeOfSignature,
+            getNonNullableType: getNonNullableType,
+            typeToTypeNode: nodeBuilder.typeToTypeNode,
+            indexInfoToIndexSignatureDeclaration: nodeBuilder.indexInfoToIndexSignatureDeclaration,
+            signatureToSignatureDeclaration: nodeBuilder.signatureToSignatureDeclaration,
+            getSymbolsInScope: function (location, meaning) {
+                location = ts.getParseTreeNode(location);
+                return location ? getSymbolsInScope(location, meaning) : [];
+            },
+            getSymbolAtLocation: function (node) {
+                node = ts.getParseTreeNode(node);
+                return node ? getSymbolAtLocation(node) : undefined;
+            },
+            getShorthandAssignmentValueSymbol: function (node) {
+                node = ts.getParseTreeNode(node);
+                return node ? getShorthandAssignmentValueSymbol(node) : undefined;
+            },
+            getExportSpecifierLocalTargetSymbol: function (node) {
+                node = ts.getParseTreeNode(node, ts.isExportSpecifier);
+                return node ? getExportSpecifierLocalTargetSymbol(node) : undefined;
+            },
+            getTypeAtLocation: function (node) {
+                node = ts.getParseTreeNode(node);
+                return node ? getTypeOfNode(node) : unknownType;
+            },
+            getPropertySymbolOfDestructuringAssignment: function (location) {
+                location = ts.getParseTreeNode(location, ts.isIdentifier);
+                return location ? getPropertySymbolOfDestructuringAssignment(location) : undefined;
+            },
+            signatureToString: function (signature, enclosingDeclaration, flags, kind) {
+                return signatureToString(signature, ts.getParseTreeNode(enclosingDeclaration), flags, kind);
+            },
+            typeToString: function (type, enclosingDeclaration, flags) {
+                return typeToString(type, ts.getParseTreeNode(enclosingDeclaration), flags);
+            },
+            getSymbolDisplayBuilder: getSymbolDisplayBuilder,
+            symbolToString: function (symbol, enclosingDeclaration, meaning) {
+                return symbolToString(symbol, ts.getParseTreeNode(enclosingDeclaration), meaning);
+            },
+            getAugmentedPropertiesOfType: getAugmentedPropertiesOfType,
+            getRootSymbols: getRootSymbols,
+            getContextualType: function (node) {
+                node = ts.getParseTreeNode(node, ts.isExpression);
+                return node ? getContextualType(node) : undefined;
+            },
+            getFullyQualifiedName: getFullyQualifiedName,
+            getResolvedSignature: function (node, candidatesOutArray) {
+                node = ts.getParseTreeNode(node, ts.isCallLikeExpression);
+                return node ? getResolvedSignature(node, candidatesOutArray) : undefined;
+            },
+            getConstantValue: function (node) {
+                node = ts.getParseTreeNode(node, canHaveConstantValue);
+                return node ? getConstantValue(node) : undefined;
+            },
+            isValidPropertyAccess: function (node, propertyName) {
+                node = ts.getParseTreeNode(node, ts.isPropertyAccessOrQualifiedName);
+                return node ? isValidPropertyAccess(node, propertyName) : false;
+            },
+            getSignatureFromDeclaration: function (declaration) {
+                declaration = ts.getParseTreeNode(declaration, ts.isFunctionLike);
+                return declaration ? getSignatureFromDeclaration(declaration) : undefined;
+            },
+            isImplementationOfOverload: function (node) {
+                node = ts.getParseTreeNode(node, ts.isFunctionLike);
+                return node ? isImplementationOfOverload(node) : undefined;
+            },
+            getImmediateAliasedSymbol: function (symbol) {
+                ts.Debug.assert((symbol.flags & 8388608 /* Alias */) !== 0, "Should only get Alias here.");
+                var links = getSymbolLinks(symbol);
+                if (!links.immediateTarget) {
+                    var node = getDeclarationOfAliasSymbol(symbol);
+                    ts.Debug.assert(!!node);
+                    links.immediateTarget = getTargetOfAliasDeclaration(node, /*dontRecursivelyResolve*/ true);
+                }
+                return links.immediateTarget;
+            },
+            getAliasedSymbol: resolveAlias,
+            getEmitResolver: getEmitResolver,
+            getExportsOfModule: getExportsOfModuleAsArray,
+            getExportsAndPropertiesOfModule: getExportsAndPropertiesOfModule,
+            getAmbientModules: getAmbientModules,
+            getAllAttributesTypeFromJsxOpeningLikeElement: function (node) {
+                node = ts.getParseTreeNode(node, ts.isJsxOpeningLikeElement);
+                return node ? getAllAttributesTypeFromJsxOpeningLikeElement(node) : undefined;
+            },
+            getJsxIntrinsicTagNames: getJsxIntrinsicTagNames,
+            isOptionalParameter: function (node) {
+                node = ts.getParseTreeNode(node, ts.isParameter);
+                return node ? isOptionalParameter(node) : false;
+            },
+            tryGetMemberInModuleExports: tryGetMemberInModuleExports,
+            tryFindAmbientModuleWithoutAugmentations: function (moduleName) {
+                // we deliberately exclude augmentations
+                // since we are only interested in declarations of the module itself
+                return tryFindAmbientModule(moduleName, /*withAugmentations*/ false);
+            },
+            getApparentType: getApparentType,
+            getAllPossiblePropertiesOfType: getAllPossiblePropertiesOfType,
+            getSuggestionForNonexistentProperty: getSuggestionForNonexistentProperty,
+            getSuggestionForNonexistentSymbol: getSuggestionForNonexistentSymbol,
+            getBaseConstraintOfType: getBaseConstraintOfType,
+            getJsxNamespace: getJsxNamespace,
+            resolveNameAtLocation: function (location, name, meaning) {
+                location = ts.getParseTreeNode(location);
+                return resolveName(location, name, meaning, /*nameNotFoundMessage*/ undefined, name);
+            },
+        };
+        var tupleTypes = [];
+        var unionTypes = ts.createMap();
+        var intersectionTypes = ts.createMap();
+        var literalTypes = ts.createMap();
+        var indexedAccessTypes = ts.createMap();
+        var evolvingArrayTypes = [];
+        var unknownSymbol = createSymbol(4 /* Property */, "unknown");
+        var resolvingSymbol = createSymbol(0, "__resolving__");
+        var anyType = createIntrinsicType(1 /* Any */, "any");
+        var autoType = createIntrinsicType(1 /* Any */, "any");
+        var unknownType = createIntrinsicType(1 /* Any */, "unknown");
+        var undefinedType = createIntrinsicType(2048 /* Undefined */, "undefined");
+        var undefinedWideningType = strictNullChecks ? undefinedType : createIntrinsicType(2048 /* Undefined */ | 2097152 /* ContainsWideningType */, "undefined");
+        var nullType = createIntrinsicType(4096 /* Null */, "null");
+        var nullWideningType = strictNullChecks ? nullType : createIntrinsicType(4096 /* Null */ | 2097152 /* ContainsWideningType */, "null");
+        var stringType = createIntrinsicType(2 /* String */, "string");
+        var numberType = createIntrinsicType(4 /* Number */, "number");
+        var trueType = createIntrinsicType(128 /* BooleanLiteral */, "true");
+        var falseType = createIntrinsicType(128 /* BooleanLiteral */, "false");
+        var booleanType = createBooleanType([trueType, falseType]);
+        var esSymbolType = createIntrinsicType(512 /* ESSymbol */, "symbol");
+        var voidType = createIntrinsicType(1024 /* Void */, "void");
+        var neverType = createIntrinsicType(8192 /* Never */, "never");
+        var silentNeverType = createIntrinsicType(8192 /* Never */, "never");
+        var nonPrimitiveType = createIntrinsicType(16777216 /* NonPrimitive */, "object");
+        var emptyObjectType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
+        var emptyTypeLiteralSymbol = createSymbol(2048 /* TypeLiteral */, "__type");
+        emptyTypeLiteralSymbol.members = ts.createMap();
+        var emptyTypeLiteralType = createAnonymousType(emptyTypeLiteralSymbol, emptySymbols, emptyArray, emptyArray, undefined, undefined);
+        var emptyGenericType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
+        emptyGenericType.instantiations = ts.createMap();
+        var anyFunctionType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
+        // The anyFunctionType contains the anyFunctionType by definition. The flag is further propagated
+        // in getPropagatingFlagsOfTypes, and it is checked in inferFromTypes.
+        anyFunctionType.flags |= 8388608 /* ContainsAnyFunctionType */;
+        var noConstraintType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
+        var circularConstraintType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
+        var anySignature = createSignature(undefined, undefined, undefined, emptyArray, anyType, /*typePredicate*/ undefined, 0, /*hasRestParameter*/ false, /*hasLiteralTypes*/ false);
+        var unknownSignature = createSignature(undefined, undefined, undefined, emptyArray, unknownType, /*typePredicate*/ undefined, 0, /*hasRestParameter*/ false, /*hasLiteralTypes*/ false);
+        var resolvingSignature = createSignature(undefined, undefined, undefined, emptyArray, anyType, /*typePredicate*/ undefined, 0, /*hasRestParameter*/ false, /*hasLiteralTypes*/ false);
+        var silentNeverSignature = createSignature(undefined, undefined, undefined, emptyArray, silentNeverType, /*typePredicate*/ undefined, 0, /*hasRestParameter*/ false, /*hasLiteralTypes*/ false);
+        var enumNumberIndexInfo = createIndexInfo(stringType, /*isReadonly*/ true);
+        var jsObjectLiteralIndexInfo = createIndexInfo(anyType, /*isReadonly*/ false);
+        var globals = ts.createMap();
+        /**
+         * List of every ambient module with a "*" wildcard.
+         * Unlike other ambient modules, these can't be stored in `globals` because symbol tables only deal with exact matches.
+         * This is only used if there is no exact match.
+         */
+        var patternAmbientModules;
+        var globalObjectType;
+        var globalFunctionType;
+        var globalArrayType;
+        var globalReadonlyArrayType;
+        var globalStringType;
+        var globalNumberType;
+        var globalBooleanType;
+        var globalRegExpType;
+        var globalThisType;
+        var anyArrayType;
+        var autoArrayType;
+        var anyReadonlyArrayType;
+        // The library files are only loaded when the feature is used.
+        // This allows users to just specify library files they want to used through --lib
+        // and they will not get an error from not having unrelated library files
+        var deferredGlobalESSymbolConstructorSymbol;
+        var deferredGlobalESSymbolType;
+        var deferredGlobalTypedPropertyDescriptorType;
+        var deferredGlobalPromiseType;
+        var deferredGlobalPromiseConstructorSymbol;
+        var deferredGlobalPromiseConstructorLikeType;
+        var deferredGlobalIterableType;
+        var deferredGlobalIteratorType;
+        var deferredGlobalIterableIteratorType;
+        var deferredGlobalAsyncIterableType;
+        var deferredGlobalAsyncIteratorType;
+        var deferredGlobalAsyncIterableIteratorType;
+        var deferredGlobalTemplateStringsArrayType;
+        var deferredJsxElementClassType;
+        var deferredJsxElementType;
+        var deferredJsxStatelessElementType;
+        var deferredNodes;
+        var deferredUnusedIdentifierNodes;
+        var flowLoopStart = 0;
+        var flowLoopCount = 0;
+        var visitedFlowCount = 0;
+        var emptyStringType = getLiteralType("");
+        var zeroType = getLiteralType(0);
+        var resolutionTargets = [];
+        var resolutionResults = [];
+        var resolutionPropertyNames = [];
+        var suggestionCount = 0;
+        var maximumSuggestionCount = 10;
+        var mergedSymbols = [];
+        var symbolLinks = [];
+        var nodeLinks = [];
+        var flowLoopCaches = [];
+        var flowLoopNodes = [];
+        var flowLoopKeys = [];
+        var flowLoopTypes = [];
+        var visitedFlowNodes = [];
+        var visitedFlowTypes = [];
+        var potentialThisCollisions = [];
+        var potentialNewTargetCollisions = [];
+        var awaitedTypeStack = [];
+        var diagnostics = ts.createDiagnosticCollection();
+        var TypeFacts;
+        (function (TypeFacts) {
+            TypeFacts[TypeFacts["None"] = 0] = "None";
+            TypeFacts[TypeFacts["TypeofEQString"] = 1] = "TypeofEQString";
+            TypeFacts[TypeFacts["TypeofEQNumber"] = 2] = "TypeofEQNumber";
+            TypeFacts[TypeFacts["TypeofEQBoolean"] = 4] = "TypeofEQBoolean";
+            TypeFacts[TypeFacts["TypeofEQSymbol"] = 8] = "TypeofEQSymbol";
+            TypeFacts[TypeFacts["TypeofEQObject"] = 16] = "TypeofEQObject";
+            TypeFacts[TypeFacts["TypeofEQFunction"] = 32] = "TypeofEQFunction";
+            TypeFacts[TypeFacts["TypeofEQHostObject"] = 64] = "TypeofEQHostObject";
+            TypeFacts[TypeFacts["TypeofNEString"] = 128] = "TypeofNEString";
+            TypeFacts[TypeFacts["TypeofNENumber"] = 256] = "TypeofNENumber";
+            TypeFacts[TypeFacts["TypeofNEBoolean"] = 512] = "TypeofNEBoolean";
+            TypeFacts[TypeFacts["TypeofNESymbol"] = 1024] = "TypeofNESymbol";
+            TypeFacts[TypeFacts["TypeofNEObject"] = 2048] = "TypeofNEObject";
+            TypeFacts[TypeFacts["TypeofNEFunction"] = 4096] = "TypeofNEFunction";
+            TypeFacts[TypeFacts["TypeofNEHostObject"] = 8192] = "TypeofNEHostObject";
+            TypeFacts[TypeFacts["EQUndefined"] = 16384] = "EQUndefined";
+            TypeFacts[TypeFacts["EQNull"] = 32768] = "EQNull";
+            TypeFacts[TypeFacts["EQUndefinedOrNull"] = 65536] = "EQUndefinedOrNull";
+            TypeFacts[TypeFacts["NEUndefined"] = 131072] = "NEUndefined";
+            TypeFacts[TypeFacts["NENull"] = 262144] = "NENull";
+            TypeFacts[TypeFacts["NEUndefinedOrNull"] = 524288] = "NEUndefinedOrNull";
+            TypeFacts[TypeFacts["Truthy"] = 1048576] = "Truthy";
+            TypeFacts[TypeFacts["Falsy"] = 2097152] = "Falsy";
+            TypeFacts[TypeFacts["Discriminatable"] = 4194304] = "Discriminatable";
+            TypeFacts[TypeFacts["All"] = 8388607] = "All";
+            // The following members encode facts about particular kinds of types for use in the getTypeFacts function.
+            // The presence of a particular fact means that the given test is true for some (and possibly all) values
+            // of that kind of type.
+            TypeFacts[TypeFacts["BaseStringStrictFacts"] = 933633] = "BaseStringStrictFacts";
+            TypeFacts[TypeFacts["BaseStringFacts"] = 3145473] = "BaseStringFacts";
+            TypeFacts[TypeFacts["StringStrictFacts"] = 4079361] = "StringStrictFacts";
+            TypeFacts[TypeFacts["StringFacts"] = 4194049] = "StringFacts";
+            TypeFacts[TypeFacts["EmptyStringStrictFacts"] = 3030785] = "EmptyStringStrictFacts";
+            TypeFacts[TypeFacts["EmptyStringFacts"] = 3145473] = "EmptyStringFacts";
+            TypeFacts[TypeFacts["NonEmptyStringStrictFacts"] = 1982209] = "NonEmptyStringStrictFacts";
+            TypeFacts[TypeFacts["NonEmptyStringFacts"] = 4194049] = "NonEmptyStringFacts";
+            TypeFacts[TypeFacts["BaseNumberStrictFacts"] = 933506] = "BaseNumberStrictFacts";
+            TypeFacts[TypeFacts["BaseNumberFacts"] = 3145346] = "BaseNumberFacts";
+            TypeFacts[TypeFacts["NumberStrictFacts"] = 4079234] = "NumberStrictFacts";
+            TypeFacts[TypeFacts["NumberFacts"] = 4193922] = "NumberFacts";
+            TypeFacts[TypeFacts["ZeroStrictFacts"] = 3030658] = "ZeroStrictFacts";
+            TypeFacts[TypeFacts["ZeroFacts"] = 3145346] = "ZeroFacts";
+            TypeFacts[TypeFacts["NonZeroStrictFacts"] = 1982082] = "NonZeroStrictFacts";
+            TypeFacts[TypeFacts["NonZeroFacts"] = 4193922] = "NonZeroFacts";
+            TypeFacts[TypeFacts["BaseBooleanStrictFacts"] = 933252] = "BaseBooleanStrictFacts";
+            TypeFacts[TypeFacts["BaseBooleanFacts"] = 3145092] = "BaseBooleanFacts";
+            TypeFacts[TypeFacts["BooleanStrictFacts"] = 4078980] = "BooleanStrictFacts";
+            TypeFacts[TypeFacts["BooleanFacts"] = 4193668] = "BooleanFacts";
+            TypeFacts[TypeFacts["FalseStrictFacts"] = 3030404] = "FalseStrictFacts";
+            TypeFacts[TypeFacts["FalseFacts"] = 3145092] = "FalseFacts";
+            TypeFacts[TypeFacts["TrueStrictFacts"] = 1981828] = "TrueStrictFacts";
+            TypeFacts[TypeFacts["TrueFacts"] = 4193668] = "TrueFacts";
+            TypeFacts[TypeFacts["SymbolStrictFacts"] = 1981320] = "SymbolStrictFacts";
+            TypeFacts[TypeFacts["SymbolFacts"] = 4193160] = "SymbolFacts";
+            TypeFacts[TypeFacts["ObjectStrictFacts"] = 6166480] = "ObjectStrictFacts";
+            TypeFacts[TypeFacts["ObjectFacts"] = 8378320] = "ObjectFacts";
+            TypeFacts[TypeFacts["FunctionStrictFacts"] = 6164448] = "FunctionStrictFacts";
+            TypeFacts[TypeFacts["FunctionFacts"] = 8376288] = "FunctionFacts";
+            TypeFacts[TypeFacts["UndefinedFacts"] = 2457472] = "UndefinedFacts";
+            TypeFacts[TypeFacts["NullFacts"] = 2340752] = "NullFacts";
+        })(TypeFacts || (TypeFacts = {}));
+        var typeofEQFacts = ts.createMapFromTemplate({
+            "string": 1 /* TypeofEQString */,
+            "number": 2 /* TypeofEQNumber */,
+            "boolean": 4 /* TypeofEQBoolean */,
+            "symbol": 8 /* TypeofEQSymbol */,
+            "undefined": 16384 /* EQUndefined */,
+            "object": 16 /* TypeofEQObject */,
+            "function": 32 /* TypeofEQFunction */
+        });
+        var typeofNEFacts = ts.createMapFromTemplate({
+            "string": 128 /* TypeofNEString */,
+            "number": 256 /* TypeofNENumber */,
+            "boolean": 512 /* TypeofNEBoolean */,
+            "symbol": 1024 /* TypeofNESymbol */,
+            "undefined": 131072 /* NEUndefined */,
+            "object": 2048 /* TypeofNEObject */,
+            "function": 4096 /* TypeofNEFunction */
+        });
+        var typeofTypesByName = ts.createMapFromTemplate({
+            "string": stringType,
+            "number": numberType,
+            "boolean": booleanType,
+            "symbol": esSymbolType,
+            "undefined": undefinedType
+        });
+        var typeofType = createTypeofType();
+        var _jsxNamespace;
+        var _jsxFactoryEntity;
+        var _jsxElementPropertiesName;
+        var _hasComputedJsxElementPropertiesName = false;
+        var _jsxElementChildrenPropertyName;
+        var _hasComputedJsxElementChildrenPropertyName = false;
+        /** Things we lazy load from the JSX namespace */
+        var jsxTypes = ts.createMap();
+        var JsxNames = {
+            JSX: "JSX",
+            IntrinsicElements: "IntrinsicElements",
+            ElementClass: "ElementClass",
+            ElementAttributesPropertyNameContainer: "ElementAttributesProperty",
+            ElementChildrenAttributeNameContainer: "ElementChildrenAttribute",
+            Element: "Element",
+            IntrinsicAttributes: "IntrinsicAttributes",
+            IntrinsicClassAttributes: "IntrinsicClassAttributes"
+        };
+        var subtypeRelation = ts.createMap();
+        var assignableRelation = ts.createMap();
+        var comparableRelation = ts.createMap();
+        var identityRelation = ts.createMap();
+        var enumRelation = ts.createMap();
+        // This is for caching the result of getSymbolDisplayBuilder. Do not access directly.
+        var _displayBuilder;
+        var TypeSystemPropertyName;
+        (function (TypeSystemPropertyName) {
+            TypeSystemPropertyName[TypeSystemPropertyName["Type"] = 0] = "Type";
+            TypeSystemPropertyName[TypeSystemPropertyName["ResolvedBaseConstructorType"] = 1] = "ResolvedBaseConstructorType";
+            TypeSystemPropertyName[TypeSystemPropertyName["DeclaredType"] = 2] = "DeclaredType";
+            TypeSystemPropertyName[TypeSystemPropertyName["ResolvedReturnType"] = 3] = "ResolvedReturnType";
+        })(TypeSystemPropertyName || (TypeSystemPropertyName = {}));
+        var CheckMode;
+        (function (CheckMode) {
+            CheckMode[CheckMode["Normal"] = 0] = "Normal";
+            CheckMode[CheckMode["SkipContextSensitive"] = 1] = "SkipContextSensitive";
+            CheckMode[CheckMode["Inferential"] = 2] = "Inferential";
+        })(CheckMode || (CheckMode = {}));
+        var builtinGlobals = ts.createMap();
+        builtinGlobals.set(undefinedSymbol.name, undefinedSymbol);
+        initializeTypeChecker();
+        return checker;
+        function getJsxNamespace() {
+            if (!_jsxNamespace) {
+                _jsxNamespace = "React";
+                if (compilerOptions.jsxFactory) {
+                    _jsxFactoryEntity = ts.parseIsolatedEntityName(compilerOptions.jsxFactory, languageVersion);
+                    if (_jsxFactoryEntity) {
+                        _jsxNamespace = getFirstIdentifier(_jsxFactoryEntity).text;
+                    }
                 }
-            }
-            return parseModuleOrNamespaceDeclaration(fullStart, decorators, modifiers, flags);
-        }
-        function isExternalModuleReference() {
-            return token() === 129 /* RequireKeyword */ &&
-                lookAhead(nextTokenIsOpenParen);
-        }
-        function nextTokenIsOpenParen() {
-            return nextToken() === 17 /* OpenParenToken */;
-        }
-        function nextTokenIsSlash() {
-            return nextToken() === 39 /* SlashToken */;
-        }
-        function parseNamespaceExportDeclaration(fullStart, decorators, modifiers) {
-            var exportDeclaration = createNode(228 /* NamespaceExportDeclaration */, fullStart);
-            exportDeclaration.decorators = decorators;
-            exportDeclaration.modifiers = modifiers;
-            parseExpected(116 /* AsKeyword */);
-            parseExpected(126 /* NamespaceKeyword */);
-            exportDeclaration.name = parseIdentifier();
-            parseExpected(23 /* SemicolonToken */);
-            return finishNode(exportDeclaration);
-        }
-        function parseImportDeclarationOrImportEqualsDeclaration(fullStart, decorators, modifiers) {
-            parseExpected(89 /* ImportKeyword */);
-            var afterImportPos = scanner.getStartPos();
-            var identifier;
-            if (isIdentifier()) {
-                identifier = parseIdentifier();
-                if (token() !== 24 /* CommaToken */ && token() !== 136 /* FromKeyword */) {
-                    // ImportEquals declaration of type:
-                    // import x = require("mod"); or
-                    // import x = M.x;
-                    var importEqualsDeclaration = createNode(229 /* ImportEqualsDeclaration */, fullStart);
-                    importEqualsDeclaration.decorators = decorators;
-                    importEqualsDeclaration.modifiers = modifiers;
-                    importEqualsDeclaration.name = identifier;
-                    parseExpected(56 /* EqualsToken */);
-                    importEqualsDeclaration.moduleReference = parseModuleReference();
-                    parseSemicolon();
-                    return addJSDocComment(finishNode(importEqualsDeclaration));
+                else if (compilerOptions.reactNamespace) {
+                    _jsxNamespace = compilerOptions.reactNamespace;
                 }
             }
-            // Import statement
-            var importDeclaration = createNode(230 /* ImportDeclaration */, fullStart);
-            importDeclaration.decorators = decorators;
-            importDeclaration.modifiers = modifiers;
-            // ImportDeclaration:
-            //  import ImportClause from ModuleSpecifier ;
-            //  import ModuleSpecifier;
-            if (identifier ||
-                token() === 37 /* AsteriskToken */ ||
-                token() === 15 /* OpenBraceToken */) {
-                importDeclaration.importClause = parseImportClause(identifier, afterImportPos);
-                parseExpected(136 /* FromKeyword */);
-            }
-            importDeclaration.moduleSpecifier = parseModuleSpecifier();
-            parseSemicolon();
-            return finishNode(importDeclaration);
-        }
-        function parseImportClause(identifier, fullStart) {
-            // ImportClause:
-            //  ImportedDefaultBinding
-            //  NameSpaceImport
-            //  NamedImports
-            //  ImportedDefaultBinding, NameSpaceImport
-            //  ImportedDefaultBinding, NamedImports
-            var importClause = createNode(231 /* ImportClause */, fullStart);
-            if (identifier) {
-                // ImportedDefaultBinding:
-                //  ImportedBinding
-                importClause.name = identifier;
-            }
-            // If there was no default import or if there is comma token after default import
-            // parse namespace or named imports
-            if (!importClause.name ||
-                parseOptional(24 /* CommaToken */)) {
-                importClause.namedBindings = token() === 37 /* AsteriskToken */ ? parseNamespaceImport() : parseNamedImportsOrExports(233 /* NamedImports */);
-            }
-            return finishNode(importClause);
+            return _jsxNamespace;
         }
-        function parseModuleReference() {
-            return isExternalModuleReference()
-                ? parseExternalModuleReference()
-                : parseEntityName(/*allowReservedWords*/ false);
-        }
-        function parseExternalModuleReference() {
-            var node = createNode(240 /* ExternalModuleReference */);
-            parseExpected(129 /* RequireKeyword */);
-            parseExpected(17 /* OpenParenToken */);
-            node.expression = parseModuleSpecifier();
-            parseExpected(18 /* CloseParenToken */);
-            return finishNode(node);
-        }
-        function parseModuleSpecifier() {
-            if (token() === 9 /* StringLiteral */) {
-                var result = parseLiteralNode();
-                internIdentifier(result.text);
-                return result;
-            }
-            else {
-                // We allow arbitrary expressions here, even though the grammar only allows string
-                // literals.  We check to ensure that it is only a string literal later in the grammar
-                // check pass.
-                return parseExpression();
-            }
+        function getEmitResolver(sourceFile, cancellationToken) {
+            // Ensure we have all the type information in place for this file so that all the
+            // emitter questions of this resolver will return the right information.
+            getDiagnostics(sourceFile, cancellationToken);
+            return emitResolver;
         }
-        function parseNamespaceImport() {
-            // NameSpaceImport:
-            //  * as ImportedBinding
-            var namespaceImport = createNode(232 /* NamespaceImport */);
-            parseExpected(37 /* AsteriskToken */);
-            parseExpected(116 /* AsKeyword */);
-            namespaceImport.name = parseIdentifier();
-            return finishNode(namespaceImport);
+        function error(location, message, arg0, arg1, arg2) {
+            var diagnostic = location
+                ? ts.createDiagnosticForNode(location, message, arg0, arg1, arg2)
+                : ts.createCompilerDiagnostic(message, arg0, arg1, arg2);
+            diagnostics.add(diagnostic);
         }
-        function parseNamedImportsOrExports(kind) {
-            var node = createNode(kind);
-            // NamedImports:
-            //  { }
-            //  { ImportsList }
-            //  { ImportsList, }
-            // ImportsList:
-            //  ImportSpecifier
-            //  ImportsList, ImportSpecifier
-            node.elements = parseBracketedList(21 /* ImportOrExportSpecifiers */, kind === 233 /* NamedImports */ ? parseImportSpecifier : parseExportSpecifier, 15 /* OpenBraceToken */, 16 /* CloseBraceToken */);
-            return finishNode(node);
+        function createSymbol(flags, name) {
+            symbolCount++;
+            var symbol = (new Symbol(flags | 134217728 /* Transient */, name));
+            symbol.checkFlags = 0;
+            return symbol;
         }
-        function parseExportSpecifier() {
-            return parseImportOrExportSpecifier(238 /* ExportSpecifier */);
+        function isTransientSymbol(symbol) {
+            return (symbol.flags & 134217728 /* Transient */) !== 0;
         }
-        function parseImportSpecifier() {
-            return parseImportOrExportSpecifier(234 /* ImportSpecifier */);
+        function getExcludedSymbolFlags(flags) {
+            var result = 0;
+            if (flags & 2 /* BlockScopedVariable */)
+                result |= 107455 /* BlockScopedVariableExcludes */;
+            if (flags & 1 /* FunctionScopedVariable */)
+                result |= 107454 /* FunctionScopedVariableExcludes */;
+            if (flags & 4 /* Property */)
+                result |= 0 /* PropertyExcludes */;
+            if (flags & 8 /* EnumMember */)
+                result |= 900095 /* EnumMemberExcludes */;
+            if (flags & 16 /* Function */)
+                result |= 106927 /* FunctionExcludes */;
+            if (flags & 32 /* Class */)
+                result |= 899519 /* ClassExcludes */;
+            if (flags & 64 /* Interface */)
+                result |= 792968 /* InterfaceExcludes */;
+            if (flags & 256 /* RegularEnum */)
+                result |= 899327 /* RegularEnumExcludes */;
+            if (flags & 128 /* ConstEnum */)
+                result |= 899967 /* ConstEnumExcludes */;
+            if (flags & 512 /* ValueModule */)
+                result |= 106639 /* ValueModuleExcludes */;
+            if (flags & 8192 /* Method */)
+                result |= 99263 /* MethodExcludes */;
+            if (flags & 32768 /* GetAccessor */)
+                result |= 41919 /* GetAccessorExcludes */;
+            if (flags & 65536 /* SetAccessor */)
+                result |= 74687 /* SetAccessorExcludes */;
+            if (flags & 262144 /* TypeParameter */)
+                result |= 530920 /* TypeParameterExcludes */;
+            if (flags & 524288 /* TypeAlias */)
+                result |= 793064 /* TypeAliasExcludes */;
+            if (flags & 8388608 /* Alias */)
+                result |= 8388608 /* AliasExcludes */;
+            return result;
         }
-        function parseImportOrExportSpecifier(kind) {
-            var node = createNode(kind);
-            // ImportSpecifier:
-            //   BindingIdentifier
-            //   IdentifierName as BindingIdentifier
-            // ExportSpecifier:
-            //   IdentifierName
-            //   IdentifierName as IdentifierName
-            var checkIdentifierIsKeyword = ts.isKeyword(token()) && !isIdentifier();
-            var checkIdentifierStart = scanner.getTokenPos();
-            var checkIdentifierEnd = scanner.getTextPos();
-            var identifierName = parseIdentifierName();
-            if (token() === 116 /* AsKeyword */) {
-                node.propertyName = identifierName;
-                parseExpected(116 /* AsKeyword */);
-                checkIdentifierIsKeyword = ts.isKeyword(token()) && !isIdentifier();
-                checkIdentifierStart = scanner.getTokenPos();
-                checkIdentifierEnd = scanner.getTextPos();
-                node.name = parseIdentifierName();
-            }
-            else {
-                node.name = identifierName;
-            }
-            if (kind === 234 /* ImportSpecifier */ && checkIdentifierIsKeyword) {
-                // Report error identifier expected
-                parseErrorAtPosition(checkIdentifierStart, checkIdentifierEnd - checkIdentifierStart, ts.Diagnostics.Identifier_expected);
+        function recordMergedSymbol(target, source) {
+            if (!source.mergeId) {
+                source.mergeId = nextMergeId;
+                nextMergeId++;
             }
-            return finishNode(node);
+            mergedSymbols[source.mergeId] = target;
         }
-        function parseExportDeclaration(fullStart, decorators, modifiers) {
-            var node = createNode(236 /* ExportDeclaration */, fullStart);
-            node.decorators = decorators;
-            node.modifiers = modifiers;
-            if (parseOptional(37 /* AsteriskToken */)) {
-                parseExpected(136 /* FromKeyword */);
-                node.moduleSpecifier = parseModuleSpecifier();
-            }
-            else {
-                node.exportClause = parseNamedImportsOrExports(237 /* NamedExports */);
-                // It is not uncommon to accidentally omit the 'from' keyword. Additionally, in editing scenarios,
-                // the 'from' keyword can be parsed as a named export when the export clause is unterminated (i.e. `export { from "moduleName";`)
-                // If we don't have a 'from' keyword, see if we have a string literal such that ASI won't take effect.
-                if (token() === 136 /* FromKeyword */ || (token() === 9 /* StringLiteral */ && !scanner.hasPrecedingLineBreak())) {
-                    parseExpected(136 /* FromKeyword */);
-                    node.moduleSpecifier = parseModuleSpecifier();
+        function cloneSymbol(symbol) {
+            var result = createSymbol(symbol.flags, symbol.name);
+            result.declarations = symbol.declarations.slice(0);
+            result.parent = symbol.parent;
+            if (symbol.valueDeclaration)
+                result.valueDeclaration = symbol.valueDeclaration;
+            if (symbol.constEnumOnlyModule)
+                result.constEnumOnlyModule = true;
+            if (symbol.members)
+                result.members = ts.cloneMap(symbol.members);
+            if (symbol.exports)
+                result.exports = ts.cloneMap(symbol.exports);
+            recordMergedSymbol(result, symbol);
+            return result;
+        }
+        function mergeSymbol(target, source) {
+            if (!(target.flags & getExcludedSymbolFlags(source.flags))) {
+                if (source.flags & 512 /* ValueModule */ && target.flags & 512 /* ValueModule */ && target.constEnumOnlyModule && !source.constEnumOnlyModule) {
+                    // reset flag when merging instantiated module into value module that has only const enums
+                    target.constEnumOnlyModule = false;
+                }
+                target.flags |= source.flags;
+                if (source.valueDeclaration &&
+                    (!target.valueDeclaration ||
+                        (target.valueDeclaration.kind === 233 /* ModuleDeclaration */ && source.valueDeclaration.kind !== 233 /* ModuleDeclaration */))) {
+                    // other kinds of value declarations take precedence over modules
+                    target.valueDeclaration = source.valueDeclaration;
+                }
+                ts.addRange(target.declarations, source.declarations);
+                if (source.members) {
+                    if (!target.members)
+                        target.members = ts.createMap();
+                    mergeSymbolTable(target.members, source.members);
+                }
+                if (source.exports) {
+                    if (!target.exports)
+                        target.exports = ts.createMap();
+                    mergeSymbolTable(target.exports, source.exports);
                 }
+                recordMergedSymbol(target, source);
             }
-            parseSemicolon();
-            return finishNode(node);
-        }
-        function parseExportAssignment(fullStart, decorators, modifiers) {
-            var node = createNode(235 /* ExportAssignment */, fullStart);
-            node.decorators = decorators;
-            node.modifiers = modifiers;
-            if (parseOptional(56 /* EqualsToken */)) {
-                node.isExportEquals = true;
+            else if (target.flags & 1024 /* NamespaceModule */) {
+                error(ts.getNameOfDeclaration(source.declarations[0]), ts.Diagnostics.Cannot_augment_module_0_with_value_exports_because_it_resolves_to_a_non_module_entity, symbolToString(target));
             }
             else {
-                parseExpected(77 /* DefaultKeyword */);
+                var message_2 = target.flags & 2 /* BlockScopedVariable */ || source.flags & 2 /* BlockScopedVariable */
+                    ? ts.Diagnostics.Cannot_redeclare_block_scoped_variable_0 : ts.Diagnostics.Duplicate_identifier_0;
+                ts.forEach(source.declarations, function (node) {
+                    error(ts.getNameOfDeclaration(node) || node, message_2, symbolToString(source));
+                });
+                ts.forEach(target.declarations, function (node) {
+                    error(ts.getNameOfDeclaration(node) || node, message_2, symbolToString(source));
+                });
             }
-            node.expression = parseAssignmentExpressionOrHigher();
-            parseSemicolon();
-            return finishNode(node);
         }
-        function processReferenceComments(sourceFile) {
-            var triviaScanner = ts.createScanner(sourceFile.languageVersion, /*skipTrivia*/ false, 0 /* Standard */, sourceText);
-            var referencedFiles = [];
-            var typeReferenceDirectives = [];
-            var amdDependencies = [];
-            var amdModuleName;
-            // Keep scanning all the leading trivia in the file until we get to something that
-            // isn't trivia.  Any single line comment will be analyzed to see if it is a
-            // reference comment.
-            while (true) {
-                var kind = triviaScanner.scan();
-                if (kind !== 2 /* SingleLineCommentTrivia */) {
-                    if (ts.isTrivia(kind)) {
-                        continue;
-                    }
-                    else {
-                        break;
-                    }
-                }
-                var range = { pos: triviaScanner.getTokenPos(), end: triviaScanner.getTextPos(), kind: triviaScanner.getToken() };
-                var comment = sourceText.substring(range.pos, range.end);
-                var referencePathMatchResult = ts.getFileReferenceFromReferencePath(comment, range);
-                if (referencePathMatchResult) {
-                    var fileReference = referencePathMatchResult.fileReference;
-                    sourceFile.hasNoDefaultLib = referencePathMatchResult.isNoDefaultLib;
-                    var diagnosticMessage = referencePathMatchResult.diagnosticMessage;
-                    if (fileReference) {
-                        if (referencePathMatchResult.isTypeReferenceDirective) {
-                            typeReferenceDirectives.push(fileReference);
-                        }
-                        else {
-                            referencedFiles.push(fileReference);
-                        }
-                    }
-                    if (diagnosticMessage) {
-                        parseDiagnostics.push(ts.createFileDiagnostic(sourceFile, range.pos, range.end - range.pos, diagnosticMessage));
-                    }
+        function mergeSymbolTable(target, source) {
+            source.forEach(function (sourceSymbol, id) {
+                var targetSymbol = target.get(id);
+                if (!targetSymbol) {
+                    target.set(id, sourceSymbol);
                 }
                 else {
-                    var amdModuleNameRegEx = /^\/\/\/\s*<amd-module\s+name\s*=\s*('|")(.+?)\1/gim;
-                    var amdModuleNameMatchResult = amdModuleNameRegEx.exec(comment);
-                    if (amdModuleNameMatchResult) {
-                        if (amdModuleName) {
-                            parseDiagnostics.push(ts.createFileDiagnostic(sourceFile, range.pos, range.end - range.pos, ts.Diagnostics.An_AMD_module_cannot_have_multiple_name_assignments));
-                        }
-                        amdModuleName = amdModuleNameMatchResult[2];
-                    }
-                    var amdDependencyRegEx = /^\/\/\/\s*<amd-dependency\s/gim;
-                    var pathRegex = /\spath\s*=\s*('|")(.+?)\1/gim;
-                    var nameRegex = /\sname\s*=\s*('|")(.+?)\1/gim;
-                    var amdDependencyMatchResult = amdDependencyRegEx.exec(comment);
-                    if (amdDependencyMatchResult) {
-                        var pathMatchResult = pathRegex.exec(comment);
-                        var nameMatchResult = nameRegex.exec(comment);
-                        if (pathMatchResult) {
-                            var amdDependency = { path: pathMatchResult[2], name: nameMatchResult ? nameMatchResult[2] : undefined };
-                            amdDependencies.push(amdDependency);
-                        }
+                    if (!(targetSymbol.flags & 134217728 /* Transient */)) {
+                        targetSymbol = cloneSymbol(targetSymbol);
+                        target.set(id, targetSymbol);
                     }
+                    mergeSymbol(targetSymbol, sourceSymbol);
                 }
-            }
-            sourceFile.referencedFiles = referencedFiles;
-            sourceFile.typeReferenceDirectives = typeReferenceDirectives;
-            sourceFile.amdDependencies = amdDependencies;
-            sourceFile.moduleName = amdModuleName;
-        }
-        function setExternalModuleIndicator(sourceFile) {
-            sourceFile.externalModuleIndicator = ts.forEach(sourceFile.statements, function (node) {
-                return ts.hasModifier(node, 1 /* Export */)
-                    || node.kind === 229 /* ImportEqualsDeclaration */ && node.moduleReference.kind === 240 /* ExternalModuleReference */
-                    || node.kind === 230 /* ImportDeclaration */
-                    || node.kind === 235 /* ExportAssignment */
-                    || node.kind === 236 /* ExportDeclaration */
-                    ? node
-                    : undefined;
             });
         }
-        var ParsingContext;
-        (function (ParsingContext) {
-            ParsingContext[ParsingContext["SourceElements"] = 0] = "SourceElements";
-            ParsingContext[ParsingContext["BlockStatements"] = 1] = "BlockStatements";
-            ParsingContext[ParsingContext["SwitchClauses"] = 2] = "SwitchClauses";
-            ParsingContext[ParsingContext["SwitchClauseStatements"] = 3] = "SwitchClauseStatements";
-            ParsingContext[ParsingContext["TypeMembers"] = 4] = "TypeMembers";
-            ParsingContext[ParsingContext["ClassMembers"] = 5] = "ClassMembers";
-            ParsingContext[ParsingContext["EnumMembers"] = 6] = "EnumMembers";
-            ParsingContext[ParsingContext["HeritageClauseElement"] = 7] = "HeritageClauseElement";
-            ParsingContext[ParsingContext["VariableDeclarations"] = 8] = "VariableDeclarations";
-            ParsingContext[ParsingContext["ObjectBindingElements"] = 9] = "ObjectBindingElements";
-            ParsingContext[ParsingContext["ArrayBindingElements"] = 10] = "ArrayBindingElements";
-            ParsingContext[ParsingContext["ArgumentExpressions"] = 11] = "ArgumentExpressions";
-            ParsingContext[ParsingContext["ObjectLiteralMembers"] = 12] = "ObjectLiteralMembers";
-            ParsingContext[ParsingContext["JsxAttributes"] = 13] = "JsxAttributes";
-            ParsingContext[ParsingContext["JsxChildren"] = 14] = "JsxChildren";
-            ParsingContext[ParsingContext["ArrayLiteralMembers"] = 15] = "ArrayLiteralMembers";
-            ParsingContext[ParsingContext["Parameters"] = 16] = "Parameters";
-            ParsingContext[ParsingContext["TypeParameters"] = 17] = "TypeParameters";
-            ParsingContext[ParsingContext["TypeArguments"] = 18] = "TypeArguments";
-            ParsingContext[ParsingContext["TupleElementTypes"] = 19] = "TupleElementTypes";
-            ParsingContext[ParsingContext["HeritageClauses"] = 20] = "HeritageClauses";
-            ParsingContext[ParsingContext["ImportOrExportSpecifiers"] = 21] = "ImportOrExportSpecifiers";
-            ParsingContext[ParsingContext["JSDocFunctionParameters"] = 22] = "JSDocFunctionParameters";
-            ParsingContext[ParsingContext["JSDocTypeArguments"] = 23] = "JSDocTypeArguments";
-            ParsingContext[ParsingContext["JSDocRecordMembers"] = 24] = "JSDocRecordMembers";
-            ParsingContext[ParsingContext["JSDocTupleTypes"] = 25] = "JSDocTupleTypes";
-            ParsingContext[ParsingContext["Count"] = 26] = "Count"; // Number of parsing contexts
-        })(ParsingContext || (ParsingContext = {}));
-        var Tristate;
-        (function (Tristate) {
-            Tristate[Tristate["False"] = 0] = "False";
-            Tristate[Tristate["True"] = 1] = "True";
-            Tristate[Tristate["Unknown"] = 2] = "Unknown";
-        })(Tristate || (Tristate = {}));
-        var JSDocParser;
-        (function (JSDocParser) {
-            function isJSDocType() {
-                switch (token()) {
-                    case 37 /* AsteriskToken */:
-                    case 53 /* QuestionToken */:
-                    case 17 /* OpenParenToken */:
-                    case 19 /* OpenBracketToken */:
-                    case 49 /* ExclamationToken */:
-                    case 15 /* OpenBraceToken */:
-                    case 87 /* FunctionKeyword */:
-                    case 22 /* DotDotDotToken */:
-                    case 92 /* NewKeyword */:
-                    case 97 /* ThisKeyword */:
-                        return true;
-                }
-                return ts.tokenIsIdentifierOrKeyword(token());
-            }
-            JSDocParser.isJSDocType = isJSDocType;
-            function parseJSDocTypeExpressionForTests(content, start, length) {
-                initializeState("file.js", content, 2 /* Latest */, /*_syntaxCursor:*/ undefined, 1 /* JS */);
-                sourceFile = createSourceFile("file.js", 2 /* Latest */, 1 /* JS */);
-                scanner.setText(content, start, length);
-                currentToken = scanner.scan();
-                var jsDocTypeExpression = parseJSDocTypeExpression();
-                var diagnostics = parseDiagnostics;
-                clearState();
-                return jsDocTypeExpression ? { jsDocTypeExpression: jsDocTypeExpression, diagnostics: diagnostics } : undefined;
-            }
-            JSDocParser.parseJSDocTypeExpressionForTests = parseJSDocTypeExpressionForTests;
-            // Parses out a JSDoc type expression.
-            /* @internal */
-            function parseJSDocTypeExpression() {
-                var result = createNode(257 /* JSDocTypeExpression */, scanner.getTokenPos());
-                parseExpected(15 /* OpenBraceToken */);
-                result.type = parseJSDocTopLevelType();
-                parseExpected(16 /* CloseBraceToken */);
-                fixupParentReferences(result);
-                return finishNode(result);
-            }
-            JSDocParser.parseJSDocTypeExpression = parseJSDocTypeExpression;
-            function parseJSDocTopLevelType() {
-                var type = parseJSDocType();
-                if (token() === 47 /* BarToken */) {
-                    var unionType = createNode(261 /* JSDocUnionType */, type.pos);
-                    unionType.types = parseJSDocTypeList(type);
-                    type = finishNode(unionType);
-                }
-                if (token() === 56 /* EqualsToken */) {
-                    var optionalType = createNode(268 /* JSDocOptionalType */, type.pos);
-                    nextToken();
-                    optionalType.type = type;
-                    type = finishNode(optionalType);
-                }
-                return type;
+        function mergeModuleAugmentation(moduleName) {
+            var moduleAugmentation = moduleName.parent;
+            if (moduleAugmentation.symbol.declarations[0] !== moduleAugmentation) {
+                // this is a combined symbol for multiple augmentations within the same file.
+                // its symbol already has accumulated information for all declarations
+                // so we need to add it just once - do the work only for first declaration
+                ts.Debug.assert(moduleAugmentation.symbol.declarations.length > 1);
+                return;
             }
-            function parseJSDocType() {
-                var type = parseBasicTypeExpression();
-                while (true) {
-                    if (token() === 19 /* OpenBracketToken */) {
-                        var arrayType = createNode(260 /* JSDocArrayType */, type.pos);
-                        arrayType.elementType = type;
-                        nextToken();
-                        parseExpected(20 /* CloseBracketToken */);
-                        type = finishNode(arrayType);
-                    }
-                    else if (token() === 53 /* QuestionToken */) {
-                        var nullableType = createNode(263 /* JSDocNullableType */, type.pos);
-                        nullableType.type = type;
-                        nextToken();
-                        type = finishNode(nullableType);
-                    }
-                    else if (token() === 49 /* ExclamationToken */) {
-                        var nonNullableType = createNode(264 /* JSDocNonNullableType */, type.pos);
-                        nonNullableType.type = type;
-                        nextToken();
-                        type = finishNode(nonNullableType);
-                    }
-                    else {
-                        break;
-                    }
-                }
-                return type;
+            if (ts.isGlobalScopeAugmentation(moduleAugmentation)) {
+                mergeSymbolTable(globals, moduleAugmentation.symbol.exports);
             }
-            function parseBasicTypeExpression() {
-                switch (token()) {
-                    case 37 /* AsteriskToken */:
-                        return parseJSDocAllType();
-                    case 53 /* QuestionToken */:
-                        return parseJSDocUnknownOrNullableType();
-                    case 17 /* OpenParenToken */:
-                        return parseJSDocUnionType();
-                    case 19 /* OpenBracketToken */:
-                        return parseJSDocTupleType();
-                    case 49 /* ExclamationToken */:
-                        return parseJSDocNonNullableType();
-                    case 15 /* OpenBraceToken */:
-                        return parseJSDocRecordType();
-                    case 87 /* FunctionKeyword */:
-                        return parseJSDocFunctionType();
-                    case 22 /* DotDotDotToken */:
-                        return parseJSDocVariadicType();
-                    case 92 /* NewKeyword */:
-                        return parseJSDocConstructorType();
-                    case 97 /* ThisKeyword */:
-                        return parseJSDocThisType();
-                    case 117 /* AnyKeyword */:
-                    case 132 /* StringKeyword */:
-                    case 130 /* NumberKeyword */:
-                    case 120 /* BooleanKeyword */:
-                    case 133 /* SymbolKeyword */:
-                    case 103 /* VoidKeyword */:
-                    case 93 /* NullKeyword */:
-                    case 135 /* UndefinedKeyword */:
-                    case 127 /* NeverKeyword */:
-                        return parseTokenNode();
-                    case 9 /* StringLiteral */:
-                    case 8 /* NumericLiteral */:
-                    case 99 /* TrueKeyword */:
-                    case 84 /* FalseKeyword */:
-                        return parseJSDocLiteralType();
+            else {
+                // find a module that about to be augmented
+                // do not validate names of augmentations that are defined in ambient context
+                var moduleNotFoundError = !ts.isInAmbientContext(moduleName.parent.parent)
+                    ? ts.Diagnostics.Invalid_module_name_in_augmentation_module_0_cannot_be_found
+                    : undefined;
+                var mainModule = resolveExternalModuleNameWorker(moduleName, moduleName, moduleNotFoundError, /*isForAugmentation*/ true);
+                if (!mainModule) {
+                    return;
                 }
-                return parseJSDocTypeReference();
-            }
-            function parseJSDocThisType() {
-                var result = createNode(272 /* JSDocThisType */);
-                nextToken();
-                parseExpected(54 /* ColonToken */);
-                result.type = parseJSDocType();
-                return finishNode(result);
-            }
-            function parseJSDocConstructorType() {
-                var result = createNode(271 /* JSDocConstructorType */);
-                nextToken();
-                parseExpected(54 /* ColonToken */);
-                result.type = parseJSDocType();
-                return finishNode(result);
-            }
-            function parseJSDocVariadicType() {
-                var result = createNode(270 /* JSDocVariadicType */);
-                nextToken();
-                result.type = parseJSDocType();
-                return finishNode(result);
-            }
-            function parseJSDocFunctionType() {
-                var result = createNode(269 /* JSDocFunctionType */);
-                nextToken();
-                parseExpected(17 /* OpenParenToken */);
-                result.parameters = parseDelimitedList(22 /* JSDocFunctionParameters */, parseJSDocParameter);
-                checkForTrailingComma(result.parameters);
-                parseExpected(18 /* CloseParenToken */);
-                if (token() === 54 /* ColonToken */) {
-                    nextToken();
-                    result.type = parseJSDocType();
+                // obtain item referenced by 'export='
+                mainModule = resolveExternalModuleSymbol(mainModule);
+                if (mainModule.flags & 1920 /* Namespace */) {
+                    // if module symbol has already been merged - it is safe to use it.
+                    // otherwise clone it
+                    mainModule = mainModule.flags & 134217728 /* Transient */ ? mainModule : cloneSymbol(mainModule);
+                    mergeSymbol(mainModule, moduleAugmentation.symbol);
                 }
-                return finishNode(result);
-            }
-            function parseJSDocParameter() {
-                var parameter = createNode(142 /* Parameter */);
-                parameter.type = parseJSDocType();
-                if (parseOptional(56 /* EqualsToken */)) {
-                    parameter.questionToken = createNode(56 /* EqualsToken */);
+                else {
+                    error(moduleName, ts.Diagnostics.Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity, moduleName.text);
                 }
-                return finishNode(parameter);
             }
-            function parseJSDocTypeReference() {
-                var result = createNode(267 /* JSDocTypeReference */);
-                result.name = parseSimplePropertyName();
-                if (token() === 25 /* LessThanToken */) {
-                    result.typeArguments = parseTypeArguments();
+        }
+        function addToSymbolTable(target, source, message) {
+            source.forEach(function (sourceSymbol, id) {
+                var targetSymbol = target.get(id);
+                if (targetSymbol) {
+                    // Error on redeclarations
+                    ts.forEach(targetSymbol.declarations, addDeclarationDiagnostic(id, message));
                 }
                 else {
-                    while (parseOptional(21 /* DotToken */)) {
-                        if (token() === 25 /* LessThanToken */) {
-                            result.typeArguments = parseTypeArguments();
-                            break;
-                        }
-                        else {
-                            result.name = parseQualifiedName(result.name);
-                        }
-                    }
+                    target.set(id, sourceSymbol);
                 }
-                return finishNode(result);
-            }
-            function parseTypeArguments() {
-                // Move past the <
-                nextToken();
-                var typeArguments = parseDelimitedList(23 /* JSDocTypeArguments */, parseJSDocType);
-                checkForTrailingComma(typeArguments);
-                checkForEmptyTypeArgumentList(typeArguments);
-                parseExpected(27 /* GreaterThanToken */);
-                return typeArguments;
+            });
+            function addDeclarationDiagnostic(id, message) {
+                return function (declaration) { return diagnostics.add(ts.createDiagnosticForNode(declaration, message, id)); };
             }
-            function checkForEmptyTypeArgumentList(typeArguments) {
-                if (parseDiagnostics.length === 0 && typeArguments && typeArguments.length === 0) {
-                    var start = typeArguments.pos - "<".length;
-                    var end = ts.skipTrivia(sourceText, typeArguments.end) + ">".length;
-                    return parseErrorAtPosition(start, end - start, ts.Diagnostics.Type_argument_list_cannot_be_empty);
+        }
+        function getSymbolLinks(symbol) {
+            if (symbol.flags & 134217728 /* Transient */)
+                return symbol;
+            var id = getSymbolId(symbol);
+            return symbolLinks[id] || (symbolLinks[id] = {});
+        }
+        function getNodeLinks(node) {
+            var nodeId = getNodeId(node);
+            return nodeLinks[nodeId] || (nodeLinks[nodeId] = { flags: 0 });
+        }
+        function getObjectFlags(type) {
+            return type.flags & 32768 /* Object */ ? type.objectFlags : 0;
+        }
+        function isGlobalSourceFile(node) {
+            return node.kind === 265 /* SourceFile */ && !ts.isExternalOrCommonJsModule(node);
+        }
+        function getSymbol(symbols, name, meaning) {
+            if (meaning) {
+                var symbol = symbols.get(name);
+                if (symbol) {
+                    ts.Debug.assert((ts.getCheckFlags(symbol) & 1 /* Instantiated */) === 0, "Should never get an instantiated symbol here.");
+                    if (symbol.flags & meaning) {
+                        return symbol;
+                    }
+                    if (symbol.flags & 8388608 /* Alias */) {
+                        var target = resolveAlias(symbol);
+                        // Unknown symbol means an error occurred in alias resolution, treat it as positive answer to avoid cascading errors
+                        if (target === unknownSymbol || target.flags & meaning) {
+                            return symbol;
+                        }
+                    }
                 }
             }
-            function parseQualifiedName(left) {
-                var result = createNode(139 /* QualifiedName */, left.pos);
-                result.left = left;
-                result.right = parseIdentifierName();
-                return finishNode(result);
-            }
-            function parseJSDocRecordType() {
-                var result = createNode(265 /* JSDocRecordType */);
-                result.literal = parseTypeLiteral();
-                return finishNode(result);
-            }
-            function parseJSDocNonNullableType() {
-                var result = createNode(264 /* JSDocNonNullableType */);
-                nextToken();
-                result.type = parseJSDocType();
-                return finishNode(result);
-            }
-            function parseJSDocTupleType() {
-                var result = createNode(262 /* JSDocTupleType */);
-                nextToken();
-                result.types = parseDelimitedList(25 /* JSDocTupleTypes */, parseJSDocType);
-                checkForTrailingComma(result.types);
-                parseExpected(20 /* CloseBracketToken */);
-                return finishNode(result);
+            // return undefined if we can't find a symbol.
+        }
+        /**
+         * Get symbols that represent parameter-property-declaration as parameter and as property declaration
+         * @param parameter a parameterDeclaration node
+         * @param parameterName a name of the parameter to get the symbols for.
+         * @return a tuple of two symbols
+         */
+        function getSymbolsOfParameterPropertyDeclaration(parameter, parameterName) {
+            var constructorDeclaration = parameter.parent;
+            var classDeclaration = parameter.parent.parent;
+            var parameterSymbol = getSymbol(constructorDeclaration.locals, parameterName, 107455 /* Value */);
+            var propertySymbol = getSymbol(classDeclaration.symbol.members, parameterName, 107455 /* Value */);
+            if (parameterSymbol && propertySymbol) {
+                return [parameterSymbol, propertySymbol];
             }
-            function checkForTrailingComma(list) {
-                if (parseDiagnostics.length === 0 && list.hasTrailingComma) {
-                    var start = list.end - ",".length;
-                    parseErrorAtPosition(start, ",".length, ts.Diagnostics.Trailing_comma_not_allowed);
+            ts.Debug.fail("There should exist two symbols, one as property declaration and one as parameter declaration");
+        }
+        function isBlockScopedNameDeclaredBeforeUse(declaration, usage) {
+            var declarationFile = ts.getSourceFileOfNode(declaration);
+            var useFile = ts.getSourceFileOfNode(usage);
+            if (declarationFile !== useFile) {
+                if ((modulekind && (declarationFile.externalModuleIndicator || useFile.externalModuleIndicator)) ||
+                    (!compilerOptions.outFile && !compilerOptions.out) ||
+                    isInTypeQuery(usage) ||
+                    ts.isInAmbientContext(declaration)) {
+                    // nodes are in different files and order cannot be determined
+                    return true;
                 }
-            }
-            function parseJSDocUnionType() {
-                var result = createNode(261 /* JSDocUnionType */);
-                nextToken();
-                result.types = parseJSDocTypeList(parseJSDocType());
-                parseExpected(18 /* CloseParenToken */);
-                return finishNode(result);
-            }
-            function parseJSDocTypeList(firstType) {
-                ts.Debug.assert(!!firstType);
-                var types = createNodeArray([firstType], firstType.pos);
-                while (parseOptional(47 /* BarToken */)) {
-                    types.push(parseJSDocType());
+                // declaration is after usage
+                // can be legal if usage is deferred (i.e. inside function or in initializer of instance property)
+                if (isUsedInFunctionOrInstanceProperty(usage, declaration)) {
+                    return true;
                 }
-                types.end = scanner.getStartPos();
-                return types;
-            }
-            function parseJSDocAllType() {
-                var result = createNode(258 /* JSDocAllType */);
-                nextToken();
-                return finishNode(result);
-            }
-            function parseJSDocLiteralType() {
-                var result = createNode(282 /* JSDocLiteralType */);
-                result.literal = parseLiteralTypeNode();
-                return finishNode(result);
+                var sourceFiles = host.getSourceFiles();
+                return ts.indexOf(sourceFiles, declarationFile) <= ts.indexOf(sourceFiles, useFile);
             }
-            function parseJSDocUnknownOrNullableType() {
-                var pos = scanner.getStartPos();
-                // skip the ?
-                nextToken();
-                // Need to lookahead to decide if this is a nullable or unknown type.
-                // Here are cases where we'll pick the unknown type:
-                //
-                //      Foo(?,
-                //      { a: ? }
-                //      Foo(?)
-                //      Foo<?>
-                //      Foo(?=
-                //      (?|
-                if (token() === 24 /* CommaToken */ ||
-                    token() === 16 /* CloseBraceToken */ ||
-                    token() === 18 /* CloseParenToken */ ||
-                    token() === 27 /* GreaterThanToken */ ||
-                    token() === 56 /* EqualsToken */ ||
-                    token() === 47 /* BarToken */) {
-                    var result = createNode(259 /* JSDocUnknownType */, pos);
-                    return finishNode(result);
+            if (declaration.pos <= usage.pos) {
+                // declaration is before usage
+                if (declaration.kind === 176 /* BindingElement */) {
+                    // still might be illegal if declaration and usage are both binding elements (eg var [a = b, b = b] = [1, 2])
+                    var errorBindingElement = ts.getAncestor(usage, 176 /* BindingElement */);
+                    if (errorBindingElement) {
+                        return ts.findAncestor(errorBindingElement, ts.isBindingElement) !== ts.findAncestor(declaration, ts.isBindingElement) ||
+                            declaration.pos < errorBindingElement.pos;
+                    }
+                    // or it might be illegal if usage happens before parent variable is declared (eg var [a] = a)
+                    return isBlockScopedNameDeclaredBeforeUse(ts.getAncestor(declaration, 226 /* VariableDeclaration */), usage);
                 }
-                else {
-                    var result = createNode(263 /* JSDocNullableType */, pos);
-                    result.type = parseJSDocType();
-                    return finishNode(result);
+                else if (declaration.kind === 226 /* VariableDeclaration */) {
+                    // still might be illegal if usage is in the initializer of the variable declaration (eg var a = a)
+                    return !isImmediatelyUsedInInitializerOfBlockScopedVariable(declaration, usage);
                 }
+                return true;
             }
-            function parseIsolatedJSDocComment(content, start, length) {
-                initializeState("file.js", content, 2 /* Latest */, /*_syntaxCursor:*/ undefined, 1 /* JS */);
-                sourceFile = { languageVariant: 0 /* Standard */, text: content };
-                var jsDoc = parseJSDocCommentWorker(start, length);
-                var diagnostics = parseDiagnostics;
-                clearState();
-                return jsDoc ? { jsDoc: jsDoc, diagnostics: diagnostics } : undefined;
+            // declaration is after usage, but it can still be legal if usage is deferred:
+            // 1. inside an export specifier
+            // 2. inside a function
+            // 3. inside an instance property initializer, a reference to a non-instance property
+            // 4. inside a static property initializer, a reference to a static method in the same class
+            // or if usage is in a type context:
+            // 1. inside a type query (typeof in type position)
+            if (usage.parent.kind === 246 /* ExportSpecifier */) {
+                // export specifiers do not use the variable, they only make it available for use
+                return true;
             }
-            JSDocParser.parseIsolatedJSDocComment = parseIsolatedJSDocComment;
-            function parseJSDocComment(parent, start, length) {
-                var saveToken = currentToken;
-                var saveParseDiagnosticsLength = parseDiagnostics.length;
-                var saveParseErrorBeforeNextFinishedNode = parseErrorBeforeNextFinishedNode;
-                var comment = parseJSDocCommentWorker(start, length);
-                if (comment) {
-                    comment.parent = parent;
+            var container = ts.getEnclosingBlockScopeContainer(declaration);
+            return isInTypeQuery(usage) || isUsedInFunctionOrInstanceProperty(usage, declaration, container);
+            function isImmediatelyUsedInInitializerOfBlockScopedVariable(declaration, usage) {
+                var container = ts.getEnclosingBlockScopeContainer(declaration);
+                switch (declaration.parent.parent.kind) {
+                    case 208 /* VariableStatement */:
+                    case 214 /* ForStatement */:
+                    case 216 /* ForOfStatement */:
+                        // variable statement/for/for-of statement case,
+                        // use site should not be inside variable declaration (initializer of declaration or binding element)
+                        if (isSameScopeDescendentOf(usage, declaration, container)) {
+                            return true;
+                        }
+                        break;
                 }
-                currentToken = saveToken;
-                parseDiagnostics.length = saveParseDiagnosticsLength;
-                parseErrorBeforeNextFinishedNode = saveParseErrorBeforeNextFinishedNode;
-                return comment;
+                // ForIn/ForOf case - use site should not be used in expression part
+                return ts.isForInOrOfStatement(declaration.parent.parent) && isSameScopeDescendentOf(usage, declaration.parent.parent.expression, container);
             }
-            JSDocParser.parseJSDocComment = parseJSDocComment;
-            var JSDocState;
-            (function (JSDocState) {
-                JSDocState[JSDocState["BeginningOfLine"] = 0] = "BeginningOfLine";
-                JSDocState[JSDocState["SawAsterisk"] = 1] = "SawAsterisk";
-                JSDocState[JSDocState["SavingComments"] = 2] = "SavingComments";
-            })(JSDocState || (JSDocState = {}));
-            function parseJSDocCommentWorker(start, length) {
-                var content = sourceText;
-                start = start || 0;
-                var end = length === undefined ? content.length : start + length;
-                length = end - start;
-                ts.Debug.assert(start >= 0);
-                ts.Debug.assert(start <= end);
-                ts.Debug.assert(end <= content.length);
-                var tags;
-                var comments = [];
-                var result;
-                // Check for /** (JSDoc opening part)
-                if (!isJsDocStart(content, start)) {
-                    return result;
-                }
-                // + 3 for leading /**, - 5 in total for /** */
-                scanner.scanRange(start + 3, length - 5, function () {
-                    // Initially we can parse out a tag.  We also have seen a starting asterisk.
-                    // This is so that /** * @type */ doesn't parse.
-                    var advanceToken = true;
-                    var state = 1 /* SawAsterisk */;
-                    var margin = undefined;
-                    // + 4 for leading '/** '
-                    var indent = start - Math.max(content.lastIndexOf("\n", start), 0) + 4;
-                    function pushComment(text) {
-                        if (!margin) {
-                            margin = indent;
-                        }
-                        comments.push(text);
-                        indent += text.length;
-                    }
-                    nextJSDocToken();
-                    while (token() === 5 /* WhitespaceTrivia */) {
-                        nextJSDocToken();
+            function isUsedInFunctionOrInstanceProperty(usage, declaration, container) {
+                return !!ts.findAncestor(usage, function (current) {
+                    if (current === container) {
+                        return "quit";
                     }
-                    if (token() === 4 /* NewLineTrivia */) {
-                        state = 0 /* BeginningOfLine */;
-                        nextJSDocToken();
+                    if (ts.isFunctionLike(current)) {
+                        return true;
                     }
-                    while (token() !== 1 /* EndOfFileToken */) {
-                        switch (token()) {
-                            case 55 /* AtToken */:
-                                if (state === 0 /* BeginningOfLine */ || state === 1 /* SawAsterisk */) {
-                                    removeTrailingNewlines(comments);
-                                    parseTag(indent);
-                                    // NOTE: According to usejsdoc.org, a tag goes to end of line, except the last tag.
-                                    // Real-world comments may break this rule, so "BeginningOfLine" will not be a real line beginning
-                                    // for malformed examples like `/** @param {string} x @returns {number} the length */`
-                                    state = 0 /* BeginningOfLine */;
-                                    advanceToken = false;
-                                    margin = undefined;
-                                    indent++;
-                                }
-                                else {
-                                    pushComment(scanner.getTokenText());
-                                }
-                                break;
-                            case 4 /* NewLineTrivia */:
-                                comments.push(scanner.getTokenText());
-                                state = 0 /* BeginningOfLine */;
-                                indent = 0;
-                                break;
-                            case 37 /* AsteriskToken */:
-                                var asterisk = scanner.getTokenText();
-                                if (state === 1 /* SawAsterisk */) {
-                                    // If we've already seen an asterisk, then we can no longer parse a tag on this line
-                                    state = 2 /* SavingComments */;
-                                    pushComment(asterisk);
-                                }
-                                else {
-                                    // Ignore the first asterisk on a line
-                                    state = 1 /* SawAsterisk */;
-                                    indent += asterisk.length;
-                                }
-                                break;
-                            case 69 /* Identifier */:
-                                // Anything else is doc comment text. We just save it. Because it
-                                // wasn't a tag, we can no longer parse a tag on this line until we hit the next
-                                // line break.
-                                pushComment(scanner.getTokenText());
-                                state = 2 /* SavingComments */;
-                                break;
-                            case 5 /* WhitespaceTrivia */:
-                                // only collect whitespace if we're already saving comments or have just crossed the comment indent margin
-                                var whitespace = scanner.getTokenText();
-                                if (state === 2 /* SavingComments */ || margin !== undefined && indent + whitespace.length > margin) {
-                                    comments.push(whitespace.slice(margin - indent - 1));
-                                }
-                                indent += whitespace.length;
-                                break;
-                            case 1 /* EndOfFileToken */:
-                                break;
-                            default:
-                                pushComment(scanner.getTokenText());
-                                break;
-                        }
-                        if (advanceToken) {
-                            nextJSDocToken();
+                    var initializerOfProperty = current.parent &&
+                        current.parent.kind === 149 /* PropertyDeclaration */ &&
+                        current.parent.initializer === current;
+                    if (initializerOfProperty) {
+                        if (ts.getModifierFlags(current.parent) & 32 /* Static */) {
+                            if (declaration.kind === 151 /* MethodDeclaration */) {
+                                return true;
+                            }
                         }
                         else {
-                            advanceToken = true;
+                            var isDeclarationInstanceProperty = declaration.kind === 149 /* PropertyDeclaration */ && !(ts.getModifierFlags(declaration) & 32 /* Static */);
+                            if (!isDeclarationInstanceProperty || ts.getContainingClass(usage) !== ts.getContainingClass(declaration)) {
+                                return true;
+                            }
                         }
                     }
-                    removeLeadingNewlines(comments);
-                    removeTrailingNewlines(comments);
-                    result = createJSDocComment();
                 });
-                return result;
-                function removeLeadingNewlines(comments) {
-                    while (comments.length && (comments[0] === "\n" || comments[0] === "\r")) {
-                        comments.shift();
-                    }
-                }
-                function removeTrailingNewlines(comments) {
-                    while (comments.length && (comments[comments.length - 1] === "\n" || comments[comments.length - 1] === "\r")) {
-                        comments.pop();
-                    }
-                }
-                function isJsDocStart(content, start) {
-                    return content.charCodeAt(start) === 47 /* slash */ &&
-                        content.charCodeAt(start + 1) === 42 /* asterisk */ &&
-                        content.charCodeAt(start + 2) === 42 /* asterisk */ &&
-                        content.charCodeAt(start + 3) !== 42 /* asterisk */;
-                }
-                function createJSDocComment() {
-                    var result = createNode(273 /* JSDocComment */, start);
-                    result.tags = tags;
-                    result.comment = comments.length ? comments.join("") : undefined;
-                    return finishNode(result, end);
-                }
-                function skipWhitespace() {
-                    while (token() === 5 /* WhitespaceTrivia */ || token() === 4 /* NewLineTrivia */) {
-                        nextJSDocToken();
+            }
+        }
+        // Resolve a given name for a given meaning at a given location. An error is reported if the name was not found and
+        // the nameNotFoundMessage argument is not undefined. Returns the resolved symbol, or undefined if no symbol with
+        // the given name can be found.
+        function resolveName(location, name, meaning, nameNotFoundMessage, nameArg, suggestedNameNotFoundMessage) {
+            return resolveNameHelper(location, name, meaning, nameNotFoundMessage, nameArg, getSymbol, suggestedNameNotFoundMessage);
+        }
+        function resolveNameHelper(location, name, meaning, nameNotFoundMessage, nameArg, lookup, suggestedNameNotFoundMessage) {
+            var originalLocation = location; // needed for did-you-mean error reporting, which gathers candidates starting from the original location
+            var result;
+            var lastLocation;
+            var propertyWithInvalidInitializer;
+            var errorLocation = location;
+            var grandparent;
+            var isInExternalModule = false;
+            loop: while (location) {
+                // Locals of a source file are not in scope (because they get merged into the global symbol table)
+                if (location.locals && !isGlobalSourceFile(location)) {
+                    if (result = lookup(location.locals, name, meaning)) {
+                        var useResult = true;
+                        if (ts.isFunctionLike(location) && lastLocation && lastLocation !== location.body) {
+                            // symbol lookup restrictions for function-like declarations
+                            // - Type parameters of a function are in scope in the entire function declaration, including the parameter
+                            //   list and return type. However, local types are only in scope in the function body.
+                            // - parameters are only in the scope of function body
+                            // This restriction does not apply to JSDoc comment types because they are parented
+                            // at a higher level than type parameters would normally be
+                            if (meaning & result.flags & 793064 /* Type */ && lastLocation.kind !== 283 /* JSDocComment */) {
+                                useResult = result.flags & 262144 /* TypeParameter */
+                                    ? lastLocation === location.type ||
+                                        lastLocation.kind === 146 /* Parameter */ ||
+                                        lastLocation.kind === 145 /* TypeParameter */
+                                    : false;
+                            }
+                            if (meaning & 107455 /* Value */ && result.flags & 1 /* FunctionScopedVariable */) {
+                                // parameters are visible only inside function body, parameter list and return type
+                                // technically for parameter list case here we might mix parameters and variables declared in function,
+                                // however it is detected separately when checking initializers of parameters
+                                // to make sure that they reference no variables declared after them.
+                                useResult =
+                                    lastLocation.kind === 146 /* Parameter */ ||
+                                        (lastLocation === location.type &&
+                                            result.valueDeclaration.kind === 146 /* Parameter */);
+                            }
+                        }
+                        if (useResult) {
+                            break loop;
+                        }
+                        else {
+                            result = undefined;
+                        }
                     }
                 }
-                function parseTag(indent) {
-                    ts.Debug.assert(token() === 55 /* AtToken */);
-                    var atToken = createNode(55 /* AtToken */, scanner.getTokenPos());
-                    atToken.end = scanner.getTextPos();
-                    nextJSDocToken();
-                    var tagName = parseJSDocIdentifierName();
-                    skipWhitespace();
-                    if (!tagName) {
-                        return;
-                    }
-                    var tag;
-                    if (tagName) {
-                        switch (tagName.text) {
-                            case "param":
-                                tag = parseParamTag(atToken, tagName);
-                                break;
-                            case "return":
-                            case "returns":
-                                tag = parseReturnTag(atToken, tagName);
-                                break;
-                            case "template":
-                                tag = parseTemplateTag(atToken, tagName);
-                                break;
-                            case "type":
-                                tag = parseTypeTag(atToken, tagName);
-                                break;
-                            case "typedef":
-                                tag = parseTypedefTag(atToken, tagName);
+                switch (location.kind) {
+                    case 265 /* SourceFile */:
+                        if (!ts.isExternalOrCommonJsModule(location))
+                            break;
+                        isInExternalModule = true;
+                    // falls through
+                    case 233 /* ModuleDeclaration */:
+                        var moduleExports = getSymbolOfNode(location).exports;
+                        if (location.kind === 265 /* SourceFile */ || ts.isAmbientModule(location)) {
+                            // It's an external module. First see if the module has an export default and if the local
+                            // name of that export default matches.
+                            if (result = moduleExports.get("default")) {
+                                var localSymbol = ts.getLocalSymbolForExportDefault(result);
+                                if (localSymbol && (result.flags & meaning) && localSymbol.name === name) {
+                                    break loop;
+                                }
+                                result = undefined;
+                            }
+                            // Because of module/namespace merging, a module's exports are in scope,
+                            // yet we never want to treat an export specifier as putting a member in scope.
+                            // Therefore, if the name we find is purely an export specifier, it is not actually considered in scope.
+                            // Two things to note about this:
+                            //     1. We have to check this without calling getSymbol. The problem with calling getSymbol
+                            //        on an export specifier is that it might find the export specifier itself, and try to
+                            //        resolve it as an alias. This will cause the checker to consider the export specifier
+                            //        a circular alias reference when it might not be.
+                            //     2. We check === SymbolFlags.Alias in order to check that the symbol is *purely*
+                            //        an alias. If we used &, we'd be throwing out symbols that have non alias aspects,
+                            //        which is not the desired behavior.
+                            var moduleExport = moduleExports.get(name);
+                            if (moduleExport &&
+                                moduleExport.flags === 8388608 /* Alias */ &&
+                                ts.getDeclarationOfKind(moduleExport, 246 /* ExportSpecifier */)) {
                                 break;
-                            default:
-                                tag = parseUnknownTag(atToken, tagName);
+                            }
+                        }
+                        if (result = lookup(moduleExports, name, meaning & 8914931 /* ModuleMember */)) {
+                            break loop;
+                        }
+                        break;
+                    case 232 /* EnumDeclaration */:
+                        if (result = lookup(getSymbolOfNode(location).exports, name, meaning & 8 /* EnumMember */)) {
+                            break loop;
+                        }
+                        break;
+                    case 149 /* PropertyDeclaration */:
+                    case 148 /* PropertySignature */:
+                        // TypeScript 1.0 spec (April 2014): 8.4.1
+                        // Initializer expressions for instance member variables are evaluated in the scope
+                        // of the class constructor body but are not permitted to reference parameters or
+                        // local variables of the constructor. This effectively means that entities from outer scopes
+                        // by the same name as a constructor parameter or local variable are inaccessible
+                        // in initializer expressions for instance member variables.
+                        if (ts.isClassLike(location.parent) && !(ts.getModifierFlags(location) & 32 /* Static */)) {
+                            var ctor = findConstructorDeclaration(location.parent);
+                            if (ctor && ctor.locals) {
+                                if (lookup(ctor.locals, name, meaning & 107455 /* Value */)) {
+                                    // Remember the property node, it will be used later to report appropriate error
+                                    propertyWithInvalidInitializer = location;
+                                }
+                            }
+                        }
+                        break;
+                    case 229 /* ClassDeclaration */:
+                    case 199 /* ClassExpression */:
+                    case 230 /* InterfaceDeclaration */:
+                        if (result = lookup(getSymbolOfNode(location).members, name, meaning & 793064 /* Type */)) {
+                            if (!isTypeParameterSymbolDeclaredInContainer(result, location)) {
+                                // ignore type parameters not declared in this container
+                                result = undefined;
                                 break;
+                            }
+                            if (lastLocation && ts.getModifierFlags(lastLocation) & 32 /* Static */) {
+                                // TypeScript 1.0 spec (April 2014): 3.4.1
+                                // The scope of a type parameter extends over the entire declaration with which the type
+                                // parameter list is associated, with the exception of static member declarations in classes.
+                                error(errorLocation, ts.Diagnostics.Static_members_cannot_reference_class_type_parameters);
+                                return undefined;
+                            }
+                            break loop;
                         }
-                    }
-                    else {
-                        tag = parseUnknownTag(atToken, tagName);
-                    }
-                    if (!tag) {
-                        // a badly malformed tag should not be added to the list of tags
-                        return;
-                    }
-                    addTag(tag, parseTagComments(indent + tag.end - tag.pos));
-                }
-                function parseTagComments(indent) {
-                    var comments = [];
-                    var state = 1 /* SawAsterisk */;
-                    var margin;
-                    function pushComment(text) {
-                        if (!margin) {
-                            margin = indent;
+                        if (location.kind === 199 /* ClassExpression */ && meaning & 32 /* Class */) {
+                            var className = location.name;
+                            if (className && name === className.text) {
+                                result = location.symbol;
+                                break loop;
+                            }
+                        }
+                        break;
+                    // It is not legal to reference a class's own type parameters from a computed property name that
+                    // belongs to the class. For example:
+                    //
+                    //   function foo<T>() { return '' }
+                    //   class C<T> { // <-- Class's own type parameter T
+                    //       [foo<T>()]() { } // <-- Reference to T from class's own computed property
+                    //   }
+                    //
+                    case 144 /* ComputedPropertyName */:
+                        grandparent = location.parent.parent;
+                        if (ts.isClassLike(grandparent) || grandparent.kind === 230 /* InterfaceDeclaration */) {
+                            // A reference to this grandparent's type parameters would be an error
+                            if (result = lookup(getSymbolOfNode(grandparent).members, name, meaning & 793064 /* Type */)) {
+                                error(errorLocation, ts.Diagnostics.A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type);
+                                return undefined;
+                            }
+                        }
+                        break;
+                    case 151 /* MethodDeclaration */:
+                    case 150 /* MethodSignature */:
+                    case 152 /* Constructor */:
+                    case 153 /* GetAccessor */:
+                    case 154 /* SetAccessor */:
+                    case 228 /* FunctionDeclaration */:
+                    case 187 /* ArrowFunction */:
+                        if (meaning & 3 /* Variable */ && name === "arguments") {
+                            result = argumentsSymbol;
+                            break loop;
+                        }
+                        break;
+                    case 186 /* FunctionExpression */:
+                        if (meaning & 3 /* Variable */ && name === "arguments") {
+                            result = argumentsSymbol;
+                            break loop;
+                        }
+                        if (meaning & 16 /* Function */) {
+                            var functionName = location.name;
+                            if (functionName && name === functionName.text) {
+                                result = location.symbol;
+                                break loop;
+                            }
+                        }
+                        break;
+                    case 147 /* Decorator */:
+                        // Decorators are resolved at the class declaration. Resolving at the parameter
+                        // or member would result in looking up locals in the method.
+                        //
+                        //   function y() {}
+                        //   class C {
+                        //       method(@y x, y) {} // <-- decorator y should be resolved at the class declaration, not the parameter.
+                        //   }
+                        //
+                        if (location.parent && location.parent.kind === 146 /* Parameter */) {
+                            location = location.parent;
+                        }
+                        //
+                        //   function y() {}
+                        //   class C {
+                        //       @y method(x, y) {} // <-- decorator y should be resolved at the class declaration, not the method.
+                        //   }
+                        //
+                        if (location.parent && ts.isClassElement(location.parent)) {
+                            location = location.parent;
                         }
-                        comments.push(text);
-                        indent += text.length;
-                    }
-                    while (token() !== 55 /* AtToken */ && token() !== 1 /* EndOfFileToken */) {
-                        switch (token()) {
-                            case 4 /* NewLineTrivia */:
-                                if (state >= 1 /* SawAsterisk */) {
-                                    state = 0 /* BeginningOfLine */;
-                                    comments.push(scanner.getTokenText());
-                                }
-                                indent = 0;
-                                break;
-                            case 55 /* AtToken */:
-                                // Done
-                                break;
-                            case 5 /* WhitespaceTrivia */:
-                                if (state === 2 /* SavingComments */) {
-                                    pushComment(scanner.getTokenText());
-                                }
-                                else {
-                                    var whitespace = scanner.getTokenText();
-                                    // if the whitespace crosses the margin, take only the whitespace that passes the margin
-                                    if (margin !== undefined && indent + whitespace.length > margin) {
-                                        comments.push(whitespace.slice(margin - indent - 1));
-                                    }
-                                    indent += whitespace.length;
-                                }
-                                break;
-                            case 37 /* AsteriskToken */:
-                                if (state === 0 /* BeginningOfLine */) {
-                                    // leading asterisks start recording on the *next* (non-whitespace) token
-                                    state = 1 /* SawAsterisk */;
-                                    indent += scanner.getTokenText().length;
-                                    break;
-                                }
-                            // FALLTHROUGH otherwise to record the * as a comment
-                            default:
-                                state = 2 /* SavingComments */; // leading identifiers start recording as well
-                                pushComment(scanner.getTokenText());
-                                break;
+                        break;
+                }
+                lastLocation = location;
+                location = location.parent;
+            }
+            if (result && nameNotFoundMessage && noUnusedIdentifiers) {
+                result.isReferenced = true;
+            }
+            if (!result) {
+                result = lookup(globals, name, meaning);
+            }
+            if (!result) {
+                if (nameNotFoundMessage) {
+                    if (!errorLocation ||
+                        !checkAndReportErrorForMissingPrefix(errorLocation, name, nameArg) &&
+                            !checkAndReportErrorForExtendingInterface(errorLocation) &&
+                            !checkAndReportErrorForUsingTypeAsNamespace(errorLocation, name, meaning) &&
+                            !checkAndReportErrorForUsingTypeAsValue(errorLocation, name, meaning) &&
+                            !checkAndReportErrorForUsingNamespaceModuleAsValue(errorLocation, name, meaning)) {
+                        var suggestion = void 0;
+                        if (suggestedNameNotFoundMessage && suggestionCount < maximumSuggestionCount) {
+                            suggestion = getSuggestionForNonexistentSymbol(originalLocation, name, meaning);
+                            if (suggestion) {
+                                error(errorLocation, suggestedNameNotFoundMessage, typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg), suggestion);
+                            }
                         }
-                        if (token() === 55 /* AtToken */) {
-                            // Done
-                            break;
+                        if (!suggestion) {
+                            error(errorLocation, nameNotFoundMessage, typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg));
                         }
-                        nextJSDocToken();
+                        suggestionCount++;
                     }
-                    removeLeadingNewlines(comments);
-                    removeTrailingNewlines(comments);
-                    return comments;
                 }
-                function parseUnknownTag(atToken, tagName) {
-                    var result = createNode(274 /* JSDocTag */, atToken.pos);
-                    result.atToken = atToken;
-                    result.tagName = tagName;
-                    return finishNode(result);
+                return undefined;
+            }
+            // Perform extra checks only if error reporting was requested
+            if (nameNotFoundMessage) {
+                if (propertyWithInvalidInitializer) {
+                    // We have a match, but the reference occurred within a property initializer and the identifier also binds
+                    // to a local variable in the constructor where the code will be emitted.
+                    var propertyName = propertyWithInvalidInitializer.name;
+                    error(errorLocation, ts.Diagnostics.Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor, ts.declarationNameToString(propertyName), typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg));
+                    return undefined;
                 }
-                function addTag(tag, comments) {
-                    tag.comment = comments.join("");
-                    if (!tags) {
-                        tags = createNodeArray([tag], tag.pos);
+                // Only check for block-scoped variable if we are looking for the
+                // name with variable meaning
+                //      For example,
+                //          declare module foo {
+                //              interface bar {}
+                //          }
+                //      const foo/*1*/: foo/*2*/.bar;
+                // The foo at /*1*/ and /*2*/ will share same symbol with two meanings:
+                // block-scoped variable and namespace module. However, only when we
+                // try to resolve name in /*1*/ which is used in variable position,
+                // we want to check for block-scoped
+                if (meaning & 2 /* BlockScopedVariable */ ||
+                    ((meaning & 32 /* Class */ || meaning & 384 /* Enum */) && (meaning & 107455 /* Value */) === 107455 /* Value */)) {
+                    var exportOrLocalSymbol = getExportSymbolOfValueSymbolIfExported(result);
+                    if (exportOrLocalSymbol.flags & 2 /* BlockScopedVariable */ || exportOrLocalSymbol.flags & 32 /* Class */ || exportOrLocalSymbol.flags & 384 /* Enum */) {
+                        checkResolvedBlockScopedVariable(exportOrLocalSymbol, errorLocation);
                     }
-                    else {
-                        tags.push(tag);
+                }
+                // If we're in an external module, we can't reference value symbols created from UMD export declarations
+                if (result && isInExternalModule && (meaning & 107455 /* Value */) === 107455 /* Value */) {
+                    var decls = result.declarations;
+                    if (decls && decls.length === 1 && decls[0].kind === 236 /* NamespaceExportDeclaration */) {
+                        error(errorLocation, ts.Diagnostics._0_refers_to_a_UMD_global_but_the_current_file_is_a_module_Consider_adding_an_import_instead, name);
                     }
-                    tags.end = tag.end;
                 }
-                function tryParseTypeExpression() {
-                    return tryParse(function () {
-                        skipWhitespace();
-                        if (token() !== 15 /* OpenBraceToken */) {
-                            return undefined;
-                        }
-                        return parseJSDocTypeExpression();
-                    });
+            }
+            return result;
+        }
+        function isTypeParameterSymbolDeclaredInContainer(symbol, container) {
+            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                var decl = _a[_i];
+                if (decl.kind === 145 /* TypeParameter */ && decl.parent === container) {
+                    return true;
                 }
-                function parseParamTag(atToken, tagName) {
-                    var typeExpression = tryParseTypeExpression();
-                    skipWhitespace();
-                    var name;
-                    var isBracketed;
-                    // Looking for something like '[foo]' or 'foo'
-                    if (parseOptionalToken(19 /* OpenBracketToken */)) {
-                        name = parseJSDocIdentifierName();
-                        skipWhitespace();
-                        isBracketed = true;
-                        // May have an optional default, e.g. '[foo = 42]'
-                        if (parseOptionalToken(56 /* EqualsToken */)) {
-                            parseExpression();
-                        }
-                        parseExpected(20 /* CloseBracketToken */);
-                    }
-                    else if (ts.tokenIsIdentifierOrKeyword(token())) {
-                        name = parseJSDocIdentifierName();
-                    }
-                    if (!name) {
-                        parseErrorAtPosition(scanner.getStartPos(), 0, ts.Diagnostics.Identifier_expected);
-                        return undefined;
-                    }
-                    var preName, postName;
-                    if (typeExpression) {
-                        postName = name;
+            }
+            return false;
+        }
+        function checkAndReportErrorForMissingPrefix(errorLocation, name, nameArg) {
+            if ((errorLocation.kind === 71 /* Identifier */ && (isTypeReferenceIdentifier(errorLocation)) || isInTypeQuery(errorLocation))) {
+                return false;
+            }
+            var container = ts.getThisContainer(errorLocation, /*includeArrowFunctions*/ true);
+            var location = container;
+            while (location) {
+                if (ts.isClassLike(location.parent)) {
+                    var classSymbol = getSymbolOfNode(location.parent);
+                    if (!classSymbol) {
+                        break;
                     }
-                    else {
-                        preName = name;
+                    // Check to see if a static member exists.
+                    var constructorType = getTypeOfSymbol(classSymbol);
+                    if (getPropertyOfType(constructorType, name)) {
+                        error(errorLocation, ts.Diagnostics.Cannot_find_name_0_Did_you_mean_the_static_member_1_0, typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg), symbolToString(classSymbol));
+                        return true;
                     }
-                    if (!typeExpression) {
-                        typeExpression = tryParseTypeExpression();
+                    // No static member is present.
+                    // Check if we're in an instance method and look for a relevant instance member.
+                    if (location === container && !(ts.getModifierFlags(location) & 32 /* Static */)) {
+                        var instanceType = getDeclaredTypeOfSymbol(classSymbol).thisType;
+                        if (getPropertyOfType(instanceType, name)) {
+                            error(errorLocation, ts.Diagnostics.Cannot_find_name_0_Did_you_mean_the_instance_member_this_0, typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg));
+                            return true;
+                        }
                     }
-                    var result = createNode(275 /* JSDocParameterTag */, atToken.pos);
-                    result.atToken = atToken;
-                    result.tagName = tagName;
-                    result.preParameterName = preName;
-                    result.typeExpression = typeExpression;
-                    result.postParameterName = postName;
-                    result.parameterName = postName || preName;
-                    result.isBracketed = isBracketed;
-                    return finishNode(result);
                 }
-                function parseReturnTag(atToken, tagName) {
-                    if (ts.forEach(tags, function (t) { return t.kind === 276 /* JSDocReturnTag */; })) {
-                        parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, ts.Diagnostics._0_tag_already_specified, tagName.text);
-                    }
-                    var result = createNode(276 /* JSDocReturnTag */, atToken.pos);
-                    result.atToken = atToken;
-                    result.tagName = tagName;
-                    result.typeExpression = tryParseTypeExpression();
-                    return finishNode(result);
+                location = location.parent;
+            }
+            return false;
+        }
+        function checkAndReportErrorForExtendingInterface(errorLocation) {
+            var expression = getEntityNameForExtendingInterface(errorLocation);
+            var isError = !!(expression && resolveEntityName(expression, 64 /* Interface */, /*ignoreErrors*/ true));
+            if (isError) {
+                error(errorLocation, ts.Diagnostics.Cannot_extend_an_interface_0_Did_you_mean_implements, ts.getTextOfNode(expression));
+            }
+            return isError;
+        }
+        /**
+         * Climbs up parents to an ExpressionWithTypeArguments, and returns its expression,
+         * but returns undefined if that expression is not an EntityNameExpression.
+         */
+        function getEntityNameForExtendingInterface(node) {
+            switch (node.kind) {
+                case 71 /* Identifier */:
+                case 179 /* PropertyAccessExpression */:
+                    return node.parent ? getEntityNameForExtendingInterface(node.parent) : undefined;
+                case 201 /* ExpressionWithTypeArguments */:
+                    ts.Debug.assert(ts.isEntityNameExpression(node.expression));
+                    return node.expression;
+                default:
+                    return undefined;
+            }
+        }
+        function checkAndReportErrorForUsingTypeAsNamespace(errorLocation, name, meaning) {
+            if (meaning === 1920 /* Namespace */) {
+                var symbol = resolveSymbol(resolveName(errorLocation, name, 793064 /* Type */ & ~107455 /* Value */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined));
+                if (symbol) {
+                    error(errorLocation, ts.Diagnostics._0_only_refers_to_a_type_but_is_being_used_as_a_namespace_here, name);
+                    return true;
                 }
-                function parseTypeTag(atToken, tagName) {
-                    if (ts.forEach(tags, function (t) { return t.kind === 277 /* JSDocTypeTag */; })) {
-                        parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, ts.Diagnostics._0_tag_already_specified, tagName.text);
-                    }
-                    var result = createNode(277 /* JSDocTypeTag */, atToken.pos);
-                    result.atToken = atToken;
-                    result.tagName = tagName;
-                    result.typeExpression = tryParseTypeExpression();
-                    return finishNode(result);
+            }
+            return false;
+        }
+        function checkAndReportErrorForUsingTypeAsValue(errorLocation, name, meaning) {
+            if (meaning & (107455 /* Value */ & ~1024 /* NamespaceModule */)) {
+                if (name === "any" || name === "string" || name === "number" || name === "boolean" || name === "never") {
+                    error(errorLocation, ts.Diagnostics._0_only_refers_to_a_type_but_is_being_used_as_a_value_here, name);
+                    return true;
                 }
-                function parsePropertyTag(atToken, tagName) {
-                    var typeExpression = tryParseTypeExpression();
-                    skipWhitespace();
-                    var name = parseJSDocIdentifierName();
-                    skipWhitespace();
-                    if (!name) {
-                        parseErrorAtPosition(scanner.getStartPos(), /*length*/ 0, ts.Diagnostics.Identifier_expected);
-                        return undefined;
-                    }
-                    var result = createNode(280 /* JSDocPropertyTag */, atToken.pos);
-                    result.atToken = atToken;
-                    result.tagName = tagName;
-                    result.name = name;
-                    result.typeExpression = typeExpression;
-                    return finishNode(result);
+                var symbol = resolveSymbol(resolveName(errorLocation, name, 793064 /* Type */ & ~107455 /* Value */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined));
+                if (symbol && !(symbol.flags & 1024 /* NamespaceModule */)) {
+                    error(errorLocation, ts.Diagnostics._0_only_refers_to_a_type_but_is_being_used_as_a_value_here, name);
+                    return true;
                 }
-                function parseTypedefTag(atToken, tagName) {
-                    var typeExpression = tryParseTypeExpression();
-                    skipWhitespace();
-                    var typedefTag = createNode(279 /* JSDocTypedefTag */, atToken.pos);
-                    typedefTag.atToken = atToken;
-                    typedefTag.tagName = tagName;
-                    typedefTag.name = parseJSDocIdentifierName();
-                    typedefTag.typeExpression = typeExpression;
-                    skipWhitespace();
-                    if (typeExpression) {
-                        if (typeExpression.type.kind === 267 /* JSDocTypeReference */) {
-                            var jsDocTypeReference = typeExpression.type;
-                            if (jsDocTypeReference.name.kind === 69 /* Identifier */) {
-                                var name_11 = jsDocTypeReference.name;
-                                if (name_11.text === "Object") {
-                                    typedefTag.jsDocTypeLiteral = scanChildTags();
-                                }
-                            }
-                        }
-                        if (!typedefTag.jsDocTypeLiteral) {
-                            typedefTag.jsDocTypeLiteral = typeExpression.type;
-                        }
+            }
+            return false;
+        }
+        function checkAndReportErrorForUsingNamespaceModuleAsValue(errorLocation, name, meaning) {
+            if (meaning & (107455 /* Value */ & ~1024 /* NamespaceModule */ & ~793064 /* Type */)) {
+                var symbol = resolveSymbol(resolveName(errorLocation, name, 1024 /* NamespaceModule */ & ~107455 /* Value */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined));
+                if (symbol) {
+                    error(errorLocation, ts.Diagnostics.Cannot_use_namespace_0_as_a_value, name);
+                    return true;
+                }
+            }
+            else if (meaning & (793064 /* Type */ & ~1024 /* NamespaceModule */ & ~107455 /* Value */)) {
+                var symbol = resolveSymbol(resolveName(errorLocation, name, 1024 /* NamespaceModule */ & ~793064 /* Type */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined));
+                if (symbol) {
+                    error(errorLocation, ts.Diagnostics.Cannot_use_namespace_0_as_a_type, name);
+                    return true;
+                }
+            }
+            return false;
+        }
+        function checkResolvedBlockScopedVariable(result, errorLocation) {
+            ts.Debug.assert(!!(result.flags & 2 /* BlockScopedVariable */ || result.flags & 32 /* Class */ || result.flags & 384 /* Enum */));
+            // Block-scoped variables cannot be used before their definition
+            var declaration = ts.forEach(result.declarations, function (d) { return ts.isBlockOrCatchScoped(d) || ts.isClassLike(d) || (d.kind === 232 /* EnumDeclaration */) ? d : undefined; });
+            ts.Debug.assert(declaration !== undefined, "Declaration to checkResolvedBlockScopedVariable is undefined");
+            if (!ts.isInAmbientContext(declaration) && !isBlockScopedNameDeclaredBeforeUse(declaration, errorLocation)) {
+                if (result.flags & 2 /* BlockScopedVariable */) {
+                    error(errorLocation, ts.Diagnostics.Block_scoped_variable_0_used_before_its_declaration, ts.declarationNameToString(ts.getNameOfDeclaration(declaration)));
+                }
+                else if (result.flags & 32 /* Class */) {
+                    error(errorLocation, ts.Diagnostics.Class_0_used_before_its_declaration, ts.declarationNameToString(ts.getNameOfDeclaration(declaration)));
+                }
+                else if (result.flags & 256 /* RegularEnum */) {
+                    error(errorLocation, ts.Diagnostics.Enum_0_used_before_its_declaration, ts.declarationNameToString(ts.getNameOfDeclaration(declaration)));
+                }
+            }
+        }
+        /* Starting from 'initial' node walk up the parent chain until 'stopAt' node is reached.
+         * If at any point current node is equal to 'parent' node - return true.
+         * Return false if 'stopAt' node is reached or isFunctionLike(current) === true.
+         */
+        function isSameScopeDescendentOf(initial, parent, stopAt) {
+            return parent && !!ts.findAncestor(initial, function (n) { return n === stopAt || ts.isFunctionLike(n) ? "quit" : n === parent; });
+        }
+        function getAnyImportSyntax(node) {
+            if (ts.isAliasSymbolDeclaration(node)) {
+                if (node.kind === 237 /* ImportEqualsDeclaration */) {
+                    return node;
+                }
+                return ts.findAncestor(node, ts.isImportDeclaration);
+            }
+        }
+        function getDeclarationOfAliasSymbol(symbol) {
+            return ts.find(symbol.declarations, ts.isAliasSymbolDeclaration);
+        }
+        function getTargetOfImportEqualsDeclaration(node, dontResolveAlias) {
+            if (node.moduleReference.kind === 248 /* ExternalModuleReference */) {
+                return resolveExternalModuleSymbol(resolveExternalModuleName(node, ts.getExternalModuleImportEqualsDeclarationExpression(node)));
+            }
+            return getSymbolOfPartOfRightHandSideOfImportEquals(node.moduleReference, dontResolveAlias);
+        }
+        function getTargetOfImportClause(node, dontResolveAlias) {
+            var moduleSymbol = resolveExternalModuleName(node, node.parent.moduleSpecifier);
+            if (moduleSymbol) {
+                var exportDefaultSymbol = void 0;
+                if (ts.isShorthandAmbientModuleSymbol(moduleSymbol)) {
+                    exportDefaultSymbol = moduleSymbol;
+                }
+                else {
+                    var exportValue = moduleSymbol.exports.get("export=");
+                    exportDefaultSymbol = exportValue
+                        ? getPropertyOfType(getTypeOfSymbol(exportValue), "default")
+                        : resolveSymbol(moduleSymbol.exports.get("default"), dontResolveAlias);
+                }
+                if (!exportDefaultSymbol && !allowSyntheticDefaultImports) {
+                    error(node.name, ts.Diagnostics.Module_0_has_no_default_export, symbolToString(moduleSymbol));
+                }
+                else if (!exportDefaultSymbol && allowSyntheticDefaultImports) {
+                    return resolveExternalModuleSymbol(moduleSymbol, dontResolveAlias) || resolveSymbol(moduleSymbol, dontResolveAlias);
+                }
+                return exportDefaultSymbol;
+            }
+        }
+        function getTargetOfNamespaceImport(node, dontResolveAlias) {
+            var moduleSpecifier = node.parent.parent.moduleSpecifier;
+            return resolveESModuleSymbol(resolveExternalModuleName(node, moduleSpecifier), moduleSpecifier, dontResolveAlias);
+        }
+        // This function creates a synthetic symbol that combines the value side of one symbol with the
+        // type/namespace side of another symbol. Consider this example:
+        //
+        //   declare module graphics {
+        //       interface Point {
+        //           x: number;
+        //           y: number;
+        //       }
+        //   }
+        //   declare var graphics: {
+        //       Point: new (x: number, y: number) => graphics.Point;
+        //   }
+        //   declare module "graphics" {
+        //       export = graphics;
+        //   }
+        //
+        // An 'import { Point } from "graphics"' needs to create a symbol that combines the value side 'Point'
+        // property with the type/namespace side interface 'Point'.
+        function combineValueAndTypeSymbols(valueSymbol, typeSymbol) {
+            if (valueSymbol === unknownSymbol && typeSymbol === unknownSymbol) {
+                return unknownSymbol;
+            }
+            if (valueSymbol.flags & (793064 /* Type */ | 1920 /* Namespace */)) {
+                return valueSymbol;
+            }
+            var result = createSymbol(valueSymbol.flags | typeSymbol.flags, valueSymbol.name);
+            result.declarations = ts.concatenate(valueSymbol.declarations, typeSymbol.declarations);
+            result.parent = valueSymbol.parent || typeSymbol.parent;
+            if (valueSymbol.valueDeclaration)
+                result.valueDeclaration = valueSymbol.valueDeclaration;
+            if (typeSymbol.members)
+                result.members = typeSymbol.members;
+            if (valueSymbol.exports)
+                result.exports = valueSymbol.exports;
+            return result;
+        }
+        function getExportOfModule(symbol, name, dontResolveAlias) {
+            if (symbol.flags & 1536 /* Module */) {
+                return resolveSymbol(getExportsOfSymbol(symbol).get(name), dontResolveAlias);
+            }
+        }
+        function getPropertyOfVariable(symbol, name) {
+            if (symbol.flags & 3 /* Variable */) {
+                var typeAnnotation = symbol.valueDeclaration.type;
+                if (typeAnnotation) {
+                    return resolveSymbol(getPropertyOfType(getTypeFromTypeNode(typeAnnotation), name));
+                }
+            }
+        }
+        function getExternalModuleMember(node, specifier, dontResolveAlias) {
+            var moduleSymbol = resolveExternalModuleName(node, node.moduleSpecifier);
+            var targetSymbol = resolveESModuleSymbol(moduleSymbol, node.moduleSpecifier, dontResolveAlias);
+            if (targetSymbol) {
+                var name_10 = specifier.propertyName || specifier.name;
+                if (name_10.text) {
+                    if (ts.isShorthandAmbientModuleSymbol(moduleSymbol)) {
+                        return moduleSymbol;
                     }
-                    else {
-                        typedefTag.jsDocTypeLiteral = scanChildTags();
+                    var symbolFromVariable = void 0;
+                    // First check if module was specified with "export=". If so, get the member from the resolved type
+                    if (moduleSymbol && moduleSymbol.exports && moduleSymbol.exports.get("export=")) {
+                        symbolFromVariable = getPropertyOfType(getTypeOfSymbol(targetSymbol), name_10.text);
                     }
-                    return finishNode(typedefTag);
-                    function scanChildTags() {
-                        var jsDocTypeLiteral = createNode(281 /* JSDocTypeLiteral */, scanner.getStartPos());
-                        var resumePos = scanner.getStartPos();
-                        var canParseTag = true;
-                        var seenAsterisk = false;
-                        var parentTagTerminated = false;
-                        while (token() !== 1 /* EndOfFileToken */ && !parentTagTerminated) {
-                            nextJSDocToken();
-                            switch (token()) {
-                                case 55 /* AtToken */:
-                                    if (canParseTag) {
-                                        parentTagTerminated = !tryParseChildTag(jsDocTypeLiteral);
-                                        if (!parentTagTerminated) {
-                                            resumePos = scanner.getStartPos();
-                                        }
-                                    }
-                                    seenAsterisk = false;
-                                    break;
-                                case 4 /* NewLineTrivia */:
-                                    resumePos = scanner.getStartPos() - 1;
-                                    canParseTag = true;
-                                    seenAsterisk = false;
-                                    break;
-                                case 37 /* AsteriskToken */:
-                                    if (seenAsterisk) {
-                                        canParseTag = false;
-                                    }
-                                    seenAsterisk = true;
-                                    break;
-                                case 69 /* Identifier */:
-                                    canParseTag = false;
-                                case 1 /* EndOfFileToken */:
-                                    break;
-                            }
-                        }
-                        scanner.setTextPos(resumePos);
-                        return finishNode(jsDocTypeLiteral);
+                    else {
+                        symbolFromVariable = getPropertyOfVariable(targetSymbol, name_10.text);
                     }
-                }
-                function tryParseChildTag(parentTag) {
-                    ts.Debug.assert(token() === 55 /* AtToken */);
-                    var atToken = createNode(55 /* AtToken */, scanner.getStartPos());
-                    atToken.end = scanner.getTextPos();
-                    nextJSDocToken();
-                    var tagName = parseJSDocIdentifierName();
-                    skipWhitespace();
-                    if (!tagName) {
-                        return false;
+                    // if symbolFromVariable is export - get its final target
+                    symbolFromVariable = resolveSymbol(symbolFromVariable, dontResolveAlias);
+                    var symbolFromModule = getExportOfModule(targetSymbol, name_10.text, dontResolveAlias);
+                    // If the export member we're looking for is default, and there is no real default but allowSyntheticDefaultImports is on, return the entire module as the default
+                    if (!symbolFromModule && allowSyntheticDefaultImports && name_10.text === "default") {
+                        symbolFromModule = resolveExternalModuleSymbol(moduleSymbol, dontResolveAlias) || resolveSymbol(moduleSymbol, dontResolveAlias);
                     }
-                    switch (tagName.text) {
-                        case "type":
-                            if (parentTag.jsDocTypeTag) {
-                                // already has a @type tag, terminate the parent tag now.
-                                return false;
-                            }
-                            parentTag.jsDocTypeTag = parseTypeTag(atToken, tagName);
-                            return true;
-                        case "prop":
-                        case "property":
-                            if (!parentTag.jsDocPropertyTags) {
-                                parentTag.jsDocPropertyTags = [];
-                            }
-                            var propertyTag = parsePropertyTag(atToken, tagName);
-                            parentTag.jsDocPropertyTags.push(propertyTag);
-                            return true;
+                    var symbol = symbolFromModule && symbolFromVariable ?
+                        combineValueAndTypeSymbols(symbolFromVariable, symbolFromModule) :
+                        symbolFromModule || symbolFromVariable;
+                    if (!symbol) {
+                        error(name_10, ts.Diagnostics.Module_0_has_no_exported_member_1, getFullyQualifiedName(moduleSymbol), ts.declarationNameToString(name_10));
                     }
-                    return false;
+                    return symbol;
                 }
-                function parseTemplateTag(atToken, tagName) {
-                    if (ts.forEach(tags, function (t) { return t.kind === 278 /* JSDocTemplateTag */; })) {
-                        parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, ts.Diagnostics._0_tag_already_specified, tagName.text);
-                    }
-                    // Type parameter list looks like '@template T,U,V'
-                    var typeParameters = createNodeArray();
-                    while (true) {
-                        var name_12 = parseJSDocIdentifierName();
-                        skipWhitespace();
-                        if (!name_12) {
-                            parseErrorAtPosition(scanner.getStartPos(), 0, ts.Diagnostics.Identifier_expected);
-                            return undefined;
-                        }
-                        var typeParameter = createNode(141 /* TypeParameter */, name_12.pos);
-                        typeParameter.name = name_12;
-                        finishNode(typeParameter);
-                        typeParameters.push(typeParameter);
-                        if (token() === 24 /* CommaToken */) {
-                            nextJSDocToken();
-                            skipWhitespace();
-                        }
-                        else {
-                            break;
-                        }
-                    }
-                    var result = createNode(278 /* JSDocTemplateTag */, atToken.pos);
-                    result.atToken = atToken;
-                    result.tagName = tagName;
-                    result.typeParameters = typeParameters;
-                    finishNode(result);
-                    typeParameters.end = result.end;
-                    return result;
+            }
+        }
+        function getTargetOfImportSpecifier(node, dontResolveAlias) {
+            return getExternalModuleMember(node.parent.parent.parent, node, dontResolveAlias);
+        }
+        function getTargetOfNamespaceExportDeclaration(node, dontResolveAlias) {
+            return resolveExternalModuleSymbol(node.parent.symbol, dontResolveAlias);
+        }
+        function getTargetOfExportSpecifier(node, meaning, dontResolveAlias) {
+            return node.parent.parent.moduleSpecifier ?
+                getExternalModuleMember(node.parent.parent, node, dontResolveAlias) :
+                resolveEntityName(node.propertyName || node.name, meaning, /*ignoreErrors*/ false, dontResolveAlias);
+        }
+        function getTargetOfExportAssignment(node, dontResolveAlias) {
+            return resolveEntityName(node.expression, 107455 /* Value */ | 793064 /* Type */ | 1920 /* Namespace */, /*ignoreErrors*/ false, dontResolveAlias);
+        }
+        function getTargetOfAliasDeclaration(node, dontRecursivelyResolve) {
+            switch (node.kind) {
+                case 237 /* ImportEqualsDeclaration */:
+                    return getTargetOfImportEqualsDeclaration(node, dontRecursivelyResolve);
+                case 239 /* ImportClause */:
+                    return getTargetOfImportClause(node, dontRecursivelyResolve);
+                case 240 /* NamespaceImport */:
+                    return getTargetOfNamespaceImport(node, dontRecursivelyResolve);
+                case 242 /* ImportSpecifier */:
+                    return getTargetOfImportSpecifier(node, dontRecursivelyResolve);
+                case 246 /* ExportSpecifier */:
+                    return getTargetOfExportSpecifier(node, 107455 /* Value */ | 793064 /* Type */ | 1920 /* Namespace */, dontRecursivelyResolve);
+                case 243 /* ExportAssignment */:
+                    return getTargetOfExportAssignment(node, dontRecursivelyResolve);
+                case 236 /* NamespaceExportDeclaration */:
+                    return getTargetOfNamespaceExportDeclaration(node, dontRecursivelyResolve);
+            }
+        }
+        /**
+         * Indicates that a symbol is an alias that does not merge with a local declaration.
+         */
+        function isNonLocalAlias(symbol, excludes) {
+            if (excludes === void 0) { excludes = 107455 /* Value */ | 793064 /* Type */ | 1920 /* Namespace */; }
+            return symbol && (symbol.flags & (8388608 /* Alias */ | excludes)) === 8388608 /* Alias */;
+        }
+        function resolveSymbol(symbol, dontResolveAlias) {
+            var shouldResolve = !dontResolveAlias && isNonLocalAlias(symbol);
+            return shouldResolve ? resolveAlias(symbol) : symbol;
+        }
+        function resolveAlias(symbol) {
+            ts.Debug.assert((symbol.flags & 8388608 /* Alias */) !== 0, "Should only get Alias here.");
+            var links = getSymbolLinks(symbol);
+            if (!links.target) {
+                links.target = resolvingSymbol;
+                var node = getDeclarationOfAliasSymbol(symbol);
+                ts.Debug.assert(!!node);
+                var target = getTargetOfAliasDeclaration(node);
+                if (links.target === resolvingSymbol) {
+                    links.target = target || unknownSymbol;
+                }
+                else {
+                    error(node, ts.Diagnostics.Circular_definition_of_import_alias_0, symbolToString(symbol));
+                }
+            }
+            else if (links.target === resolvingSymbol) {
+                links.target = unknownSymbol;
+            }
+            return links.target;
+        }
+        function markExportAsReferenced(node) {
+            var symbol = getSymbolOfNode(node);
+            var target = resolveAlias(symbol);
+            if (target) {
+                var markAlias = target === unknownSymbol ||
+                    ((target.flags & 107455 /* Value */) && !isConstEnumOrConstEnumOnlyModule(target));
+                if (markAlias) {
+                    markAliasSymbolAsReferenced(symbol);
+                }
+            }
+        }
+        // When an alias symbol is referenced, we need to mark the entity it references as referenced and in turn repeat that until
+        // we reach a non-alias or an exported entity (which is always considered referenced). We do this by checking the target of
+        // the alias as an expression (which recursively takes us back here if the target references another alias).
+        function markAliasSymbolAsReferenced(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.referenced) {
+                links.referenced = true;
+                var node = getDeclarationOfAliasSymbol(symbol);
+                ts.Debug.assert(!!node);
+                if (node.kind === 243 /* ExportAssignment */) {
+                    // export default <symbol>
+                    checkExpressionCached(node.expression);
+                }
+                else if (node.kind === 246 /* ExportSpecifier */) {
+                    // export { <symbol> } or export { <symbol> as foo }
+                    checkExpressionCached(node.propertyName || node.name);
+                }
+                else if (ts.isInternalModuleImportEqualsDeclaration(node)) {
+                    // import foo = <symbol>
+                    checkExpressionCached(node.moduleReference);
+                }
+            }
+        }
+        // This function is only for imports with entity names
+        function getSymbolOfPartOfRightHandSideOfImportEquals(entityName, dontResolveAlias) {
+            // There are three things we might try to look for. In the following examples,
+            // the search term is enclosed in |...|:
+            //
+            //     import a = |b|; // Namespace
+            //     import a = |b.c|; // Value, type, namespace
+            //     import a = |b.c|.d; // Namespace
+            if (entityName.kind === 71 /* Identifier */ && ts.isRightSideOfQualifiedNameOrPropertyAccess(entityName)) {
+                entityName = entityName.parent;
+            }
+            // Check for case 1 and 3 in the above example
+            if (entityName.kind === 71 /* Identifier */ || entityName.parent.kind === 143 /* QualifiedName */) {
+                return resolveEntityName(entityName, 1920 /* Namespace */, /*ignoreErrors*/ false, dontResolveAlias);
+            }
+            else {
+                // Case 2 in above example
+                // entityName.kind could be a QualifiedName or a Missing identifier
+                ts.Debug.assert(entityName.parent.kind === 237 /* ImportEqualsDeclaration */);
+                return resolveEntityName(entityName, 107455 /* Value */ | 793064 /* Type */ | 1920 /* Namespace */, /*ignoreErrors*/ false, dontResolveAlias);
+            }
+        }
+        function getFullyQualifiedName(symbol) {
+            return symbol.parent ? getFullyQualifiedName(symbol.parent) + "." + symbolToString(symbol) : symbolToString(symbol);
+        }
+        /**
+         * Resolves a qualified name and any involved aliases.
+         */
+        function resolveEntityName(name, meaning, ignoreErrors, dontResolveAlias, location) {
+            if (ts.nodeIsMissing(name)) {
+                return undefined;
+            }
+            var symbol;
+            if (name.kind === 71 /* Identifier */) {
+                var message = meaning === 1920 /* Namespace */ ? ts.Diagnostics.Cannot_find_namespace_0 : ts.Diagnostics.Cannot_find_name_0;
+                symbol = resolveName(location || name, name.text, meaning, ignoreErrors ? undefined : message, name);
+                if (!symbol) {
+                    return undefined;
                 }
-                function nextJSDocToken() {
-                    return currentToken = scanner.scanJSDocToken();
+            }
+            else if (name.kind === 143 /* QualifiedName */ || name.kind === 179 /* PropertyAccessExpression */) {
+                var left = void 0;
+                if (name.kind === 143 /* QualifiedName */) {
+                    left = name.left;
                 }
-                function parseJSDocIdentifierName() {
-                    return createJSDocIdentifier(ts.tokenIsIdentifierOrKeyword(token()));
+                else if (name.kind === 179 /* PropertyAccessExpression */ &&
+                    (name.expression.kind === 185 /* ParenthesizedExpression */ || ts.isEntityNameExpression(name.expression))) {
+                    left = name.expression;
                 }
-                function createJSDocIdentifier(isIdentifier) {
-                    if (!isIdentifier) {
-                        parseErrorAtCurrentToken(ts.Diagnostics.Identifier_expected);
-                        return undefined;
+                else {
+                    // If the expression in property-access expression is not entity-name or parenthsizedExpression (e.g. it is a call expression), it won't be able to successfully resolve the name.
+                    // This is the case when we are trying to do any language service operation in heritage clauses. By return undefined, the getSymbolOfEntityNameOrPropertyAccessExpression
+                    // will attempt to checkPropertyAccessExpression to resolve symbol.
+                    // i.e class C extends foo()./*do language service operation here*/B {}
+                    return undefined;
+                }
+                var right = name.kind === 143 /* QualifiedName */ ? name.right : name.name;
+                var namespace = resolveEntityName(left, 1920 /* Namespace */, ignoreErrors, /*dontResolveAlias*/ false, location);
+                if (!namespace || ts.nodeIsMissing(right)) {
+                    return undefined;
+                }
+                else if (namespace === unknownSymbol) {
+                    return namespace;
+                }
+                symbol = getSymbol(getExportsOfSymbol(namespace), right.text, meaning);
+                if (!symbol) {
+                    if (!ignoreErrors) {
+                        error(right, ts.Diagnostics.Namespace_0_has_no_exported_member_1, getFullyQualifiedName(namespace), ts.declarationNameToString(right));
                     }
-                    var pos = scanner.getTokenPos();
-                    var end = scanner.getTextPos();
-                    var result = createNode(69 /* Identifier */, pos);
-                    result.text = content.substring(pos, end);
-                    finishNode(result, end);
-                    nextJSDocToken();
-                    return result;
+                    return undefined;
                 }
             }
-            JSDocParser.parseJSDocCommentWorker = parseJSDocCommentWorker;
-        })(JSDocParser = Parser.JSDocParser || (Parser.JSDocParser = {}));
-    })(Parser || (Parser = {}));
-    var IncrementalParser;
-    (function (IncrementalParser) {
-        function updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks) {
-            aggressiveChecks = aggressiveChecks || ts.Debug.shouldAssert(2 /* Aggressive */);
-            checkChangeRange(sourceFile, newText, textChangeRange, aggressiveChecks);
-            if (ts.textChangeRangeIsUnchanged(textChangeRange)) {
-                // if the text didn't change, then we can just return our current source file as-is.
-                return sourceFile;
+            else if (name.kind === 185 /* ParenthesizedExpression */) {
+                // If the expression in parenthesizedExpression is not an entity-name (e.g. it is a call expression), it won't be able to successfully resolve the name.
+                // This is the case when we are trying to do any language service operation in heritage clauses.
+                // By return undefined, the getSymbolOfEntityNameOrPropertyAccessExpression will attempt to checkPropertyAccessExpression to resolve symbol.
+                // i.e class C extends foo()./*do language service operation here*/B {}
+                return ts.isEntityNameExpression(name.expression) ?
+                    resolveEntityName(name.expression, meaning, ignoreErrors, dontResolveAlias, location) :
+                    undefined;
             }
-            if (sourceFile.statements.length === 0) {
-                // If we don't have any statements in the current source file, then there's no real
-                // way to incrementally parse.  So just do a full parse instead.
-                return Parser.parseSourceFile(sourceFile.fileName, newText, sourceFile.languageVersion, /*syntaxCursor*/ undefined, /*setParentNodes*/ true, sourceFile.scriptKind);
+            else {
+                ts.Debug.fail("Unknown entity name kind.");
             }
-            // Make sure we're not trying to incrementally update a source file more than once.  Once
-            // we do an update the original source file is considered unusable from that point onwards.
-            //
-            // This is because we do incremental parsing in-place.  i.e. we take nodes from the old
-            // tree and give them new positions and parents.  From that point on, trusting the old
-            // tree at all is not possible as far too much of it may violate invariants.
-            var incrementalSourceFile = sourceFile;
-            ts.Debug.assert(!incrementalSourceFile.hasBeenIncrementallyParsed);
-            incrementalSourceFile.hasBeenIncrementallyParsed = true;
-            var oldText = sourceFile.text;
-            var syntaxCursor = createSyntaxCursor(sourceFile);
-            // Make the actual change larger so that we know to reparse anything whose lookahead
-            // might have intersected the change.
-            var changeRange = extendToAffectedRange(sourceFile, textChangeRange);
-            checkChangeRange(sourceFile, newText, changeRange, aggressiveChecks);
-            // Ensure that extending the affected range only moved the start of the change range
-            // earlier in the file.
-            ts.Debug.assert(changeRange.span.start <= textChangeRange.span.start);
-            ts.Debug.assert(ts.textSpanEnd(changeRange.span) === ts.textSpanEnd(textChangeRange.span));
-            ts.Debug.assert(ts.textSpanEnd(ts.textChangeRangeNewSpan(changeRange)) === ts.textSpanEnd(ts.textChangeRangeNewSpan(textChangeRange)));
-            // The is the amount the nodes after the edit range need to be adjusted.  It can be
-            // positive (if the edit added characters), negative (if the edit deleted characters)
-            // or zero (if this was a pure overwrite with nothing added/removed).
-            var delta = ts.textChangeRangeNewSpan(changeRange).length - changeRange.span.length;
-            // If we added or removed characters during the edit, then we need to go and adjust all
-            // the nodes after the edit.  Those nodes may move forward (if we inserted chars) or they
-            // may move backward (if we deleted chars).
-            //
-            // Doing this helps us out in two ways.  First, it means that any nodes/tokens we want
-            // to reuse are already at the appropriate position in the new text.  That way when we
-            // reuse them, we don't have to figure out if they need to be adjusted.  Second, it makes
-            // it very easy to determine if we can reuse a node.  If the node's position is at where
-            // we are in the text, then we can reuse it.  Otherwise we can't.  If the node's position
-            // is ahead of us, then we'll need to rescan tokens.  If the node's position is behind
-            // us, then we'll need to skip it or crumble it as appropriate
-            //
-            // We will also adjust the positions of nodes that intersect the change range as well.
-            // By doing this, we ensure that all the positions in the old tree are consistent, not
-            // just the positions of nodes entirely before/after the change range.  By being
-            // consistent, we can then easily map from positions to nodes in the old tree easily.
-            //
-            // Also, mark any syntax elements that intersect the changed span.  We know, up front,
-            // that we cannot reuse these elements.
-            updateTokenPositionsAndMarkElements(incrementalSourceFile, changeRange.span.start, ts.textSpanEnd(changeRange.span), ts.textSpanEnd(ts.textChangeRangeNewSpan(changeRange)), delta, oldText, newText, aggressiveChecks);
-            // Now that we've set up our internal incremental state just proceed and parse the
-            // source file in the normal fashion.  When possible the parser will retrieve and
-            // reuse nodes from the old tree.
-            //
-            // Note: passing in 'true' for setNodeParents is very important.  When incrementally
-            // parsing, we will be reusing nodes from the old tree, and placing it into new
-            // parents.  If we don't set the parents now, we'll end up with an observably
-            // inconsistent tree.  Setting the parents on the new tree should be very fast.  We
-            // will immediately bail out of walking any subtrees when we can see that their parents
-            // are already correct.
-            var result = Parser.parseSourceFile(sourceFile.fileName, newText, sourceFile.languageVersion, syntaxCursor, /*setParentNodes*/ true, sourceFile.scriptKind);
-            return result;
+            ts.Debug.assert((ts.getCheckFlags(symbol) & 1 /* Instantiated */) === 0, "Should never get an instantiated symbol here.");
+            return (symbol.flags & meaning) || dontResolveAlias ? symbol : resolveAlias(symbol);
         }
-        IncrementalParser.updateSourceFile = updateSourceFile;
-        function moveElementEntirelyPastChangeRange(element, isArray, delta, oldText, newText, aggressiveChecks) {
-            if (isArray) {
-                visitArray(element);
+        function resolveExternalModuleName(location, moduleReferenceExpression) {
+            return resolveExternalModuleNameWorker(location, moduleReferenceExpression, ts.Diagnostics.Cannot_find_module_0);
+        }
+        function resolveExternalModuleNameWorker(location, moduleReferenceExpression, moduleNotFoundError, isForAugmentation) {
+            if (isForAugmentation === void 0) { isForAugmentation = false; }
+            if (moduleReferenceExpression.kind !== 9 /* StringLiteral */ && moduleReferenceExpression.kind !== 13 /* NoSubstitutionTemplateLiteral */) {
+                return;
             }
-            else {
-                visitNode(element);
+            var moduleReferenceLiteral = moduleReferenceExpression;
+            return resolveExternalModule(location, moduleReferenceLiteral.text, moduleNotFoundError, moduleReferenceLiteral, isForAugmentation);
+        }
+        function resolveExternalModule(location, moduleReference, moduleNotFoundError, errorNode, isForAugmentation) {
+            if (isForAugmentation === void 0) { isForAugmentation = false; }
+            // Module names are escaped in our symbol table.  However, string literal values aren't.
+            // Escape the name in the "require(...)" clause to ensure we find the right symbol.
+            var moduleName = ts.escapeIdentifier(moduleReference);
+            if (moduleName === undefined) {
+                return;
             }
-            return;
-            function visitNode(node) {
-                var text = "";
-                if (aggressiveChecks && shouldCheckNode(node)) {
-                    text = oldText.substring(node.pos, node.end);
+            if (ts.startsWith(moduleReference, "@types/")) {
+                var diag = ts.Diagnostics.Cannot_import_type_declaration_files_Consider_importing_0_instead_of_1;
+                var withoutAtTypePrefix = ts.removePrefix(moduleReference, "@types/");
+                error(errorNode, diag, withoutAtTypePrefix, moduleReference);
+            }
+            var ambientModule = tryFindAmbientModule(moduleName, /*withAugmentations*/ true);
+            if (ambientModule) {
+                return ambientModule;
+            }
+            var isRelative = ts.isExternalModuleNameRelative(moduleName);
+            var resolvedModule = ts.getResolvedModule(ts.getSourceFileOfNode(location), moduleReference);
+            var resolutionDiagnostic = resolvedModule && ts.getResolutionDiagnostic(compilerOptions, resolvedModule);
+            var sourceFile = resolvedModule && !resolutionDiagnostic && host.getSourceFile(resolvedModule.resolvedFileName);
+            if (sourceFile) {
+                if (sourceFile.symbol) {
+                    // merged symbol is module declaration symbol combined with all augmentations
+                    return getMergedSymbol(sourceFile.symbol);
                 }
-                // Ditch any existing LS children we may have created.  This way we can avoid
-                // moving them forward.
-                if (node._children) {
-                    node._children = undefined;
+                if (moduleNotFoundError) {
+                    // report errors only if it was requested
+                    error(errorNode, ts.Diagnostics.File_0_is_not_a_module, sourceFile.fileName);
                 }
-                node.pos += delta;
-                node.end += delta;
-                if (aggressiveChecks && shouldCheckNode(node)) {
-                    ts.Debug.assert(text === newText.substring(node.pos, node.end));
+                return undefined;
+            }
+            if (patternAmbientModules) {
+                var pattern = ts.findBestPatternMatch(patternAmbientModules, function (_) { return _.pattern; }, moduleName);
+                if (pattern) {
+                    return getMergedSymbol(pattern.symbol);
                 }
-                forEachChild(node, visitNode, visitArray);
-                if (node.jsDocComments) {
-                    for (var _i = 0, _a = node.jsDocComments; _i < _a.length; _i++) {
-                        var jsDocComment = _a[_i];
-                        forEachChild(jsDocComment, visitNode, visitArray);
-                    }
+            }
+            // May be an untyped module. If so, ignore resolutionDiagnostic.
+            if (!isRelative && resolvedModule && !ts.extensionIsTypeScript(resolvedModule.extension)) {
+                if (isForAugmentation) {
+                    var diag = ts.Diagnostics.Invalid_module_name_in_augmentation_Module_0_resolves_to_an_untyped_module_at_1_which_cannot_be_augmented;
+                    error(errorNode, diag, moduleReference, resolvedModule.resolvedFileName);
                 }
-                checkNodePositions(node, aggressiveChecks);
+                else if (noImplicitAny && moduleNotFoundError) {
+                    var errorInfo = ts.chainDiagnosticMessages(/*details*/ undefined, ts.Diagnostics.Try_npm_install_types_Slash_0_if_it_exists_or_add_a_new_declaration_d_ts_file_containing_declare_module_0, moduleReference);
+                    errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.Could_not_find_a_declaration_file_for_module_0_1_implicitly_has_an_any_type, moduleReference, resolvedModule.resolvedFileName);
+                    diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(errorNode, errorInfo));
+                }
+                // Failed imports and untyped modules are both treated in an untyped manner; only difference is whether we give a diagnostic first.
+                return undefined;
             }
-            function visitArray(array) {
-                array._children = undefined;
-                array.pos += delta;
-                array.end += delta;
-                for (var _i = 0, array_8 = array; _i < array_8.length; _i++) {
-                    var node = array_8[_i];
-                    visitNode(node);
+            if (moduleNotFoundError) {
+                // report errors only if it was requested
+                if (resolutionDiagnostic) {
+                    error(errorNode, resolutionDiagnostic, moduleName, resolvedModule.resolvedFileName);
+                }
+                else {
+                    var tsExtension = ts.tryExtractTypeScriptExtension(moduleName);
+                    if (tsExtension) {
+                        var diag = ts.Diagnostics.An_import_path_cannot_end_with_a_0_extension_Consider_importing_1_instead;
+                        error(errorNode, diag, tsExtension, ts.removeExtension(moduleName, tsExtension));
+                    }
+                    else {
+                        error(errorNode, moduleNotFoundError, moduleName);
+                    }
                 }
             }
+            return undefined;
         }
-        function shouldCheckNode(node) {
-            switch (node.kind) {
-                case 9 /* StringLiteral */:
-                case 8 /* NumericLiteral */:
-                case 69 /* Identifier */:
-                    return true;
-            }
-            return false;
+        // An external module with an 'export =' declaration resolves to the target of the 'export =' declaration,
+        // and an external module with no 'export =' declaration resolves to the module itself.
+        function resolveExternalModuleSymbol(moduleSymbol, dontResolveAlias) {
+            return moduleSymbol && getMergedSymbol(resolveSymbol(moduleSymbol.exports.get("export="), dontResolveAlias)) || moduleSymbol;
         }
-        function adjustIntersectingElement(element, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta) {
-            ts.Debug.assert(element.end >= changeStart, "Adjusting an element that was entirely before the change range");
-            ts.Debug.assert(element.pos <= changeRangeOldEnd, "Adjusting an element that was entirely after the change range");
-            ts.Debug.assert(element.pos <= element.end);
-            // We have an element that intersects the change range in some way.  It may have its
-            // start, or its end (or both) in the changed range.  We want to adjust any part
-            // that intersects such that the final tree is in a consistent state.  i.e. all
-            // children have spans within the span of their parent, and all siblings are ordered
-            // properly.
-            // We may need to update both the 'pos' and the 'end' of the element.
-            // If the 'pos' is before the start of the change, then we don't need to touch it.
-            // If it isn't, then the 'pos' must be inside the change.  How we update it will
-            // depend if delta is  positive or negative.  If delta is positive then we have
-            // something like:
-            //
-            //  -------------------AAA-----------------
-            //  -------------------BBBCCCCCCC-----------------
-            //
-            // In this case, we consider any node that started in the change range to still be
-            // starting at the same position.
-            //
-            // however, if the delta is negative, then we instead have something like this:
-            //
-            //  -------------------XXXYYYYYYY-----------------
-            //  -------------------ZZZ-----------------
-            //
-            // In this case, any element that started in the 'X' range will keep its position.
-            // However any element that started after that will have their pos adjusted to be
-            // at the end of the new range.  i.e. any node that started in the 'Y' range will
-            // be adjusted to have their start at the end of the 'Z' range.
-            //
-            // The element will keep its position if possible.  Or Move backward to the new-end
-            // if it's in the 'Y' range.
-            element.pos = Math.min(element.pos, changeRangeNewEnd);
-            // If the 'end' is after the change range, then we always adjust it by the delta
-            // amount.  However, if the end is in the change range, then how we adjust it
-            // will depend on if delta is  positive or negative.  If delta is positive then we
-            // have something like:
-            //
-            //  -------------------AAA-----------------
-            //  -------------------BBBCCCCCCC-----------------
-            //
-            // In this case, we consider any node that ended inside the change range to keep its
-            // end position.
-            //
-            // however, if the delta is negative, then we instead have something like this:
-            //
-            //  -------------------XXXYYYYYYY-----------------
-            //  -------------------ZZZ-----------------
-            //
-            // In this case, any element that ended in the 'X' range will keep its position.
-            // However any element that ended after that will have their pos adjusted to be
-            // at the end of the new range.  i.e. any node that ended in the 'Y' range will
-            // be adjusted to have their end at the end of the 'Z' range.
-            if (element.end >= changeRangeOldEnd) {
-                // Element ends after the change range.  Always adjust the end pos.
-                element.end += delta;
-            }
-            else {
-                // Element ends in the change range.  The element will keep its position if
-                // possible. Or Move backward to the new-end if it's in the 'Y' range.
-                element.end = Math.min(element.end, changeRangeNewEnd);
+        // An external module with an 'export =' declaration may be referenced as an ES6 module provided the 'export ='
+        // references a symbol that is at least declared as a module or a variable. The target of the 'export =' may
+        // combine other declarations with the module or variable (e.g. a class/module, function/module, interface/variable).
+        function resolveESModuleSymbol(moduleSymbol, moduleReferenceExpression, dontResolveAlias) {
+            var symbol = resolveExternalModuleSymbol(moduleSymbol, dontResolveAlias);
+            if (!dontResolveAlias && symbol && !(symbol.flags & (1536 /* Module */ | 3 /* Variable */))) {
+                error(moduleReferenceExpression, ts.Diagnostics.Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct, symbolToString(moduleSymbol));
             }
-            ts.Debug.assert(element.pos <= element.end);
-            if (element.parent) {
-                ts.Debug.assert(element.pos >= element.parent.pos);
-                ts.Debug.assert(element.end <= element.parent.end);
+            return symbol;
+        }
+        function hasExportAssignmentSymbol(moduleSymbol) {
+            return moduleSymbol.exports.get("export=") !== undefined;
+        }
+        function getExportsOfModuleAsArray(moduleSymbol) {
+            return symbolsToArray(getExportsOfModule(moduleSymbol));
+        }
+        function getExportsAndPropertiesOfModule(moduleSymbol) {
+            var exports = getExportsOfModuleAsArray(moduleSymbol);
+            var exportEquals = resolveExternalModuleSymbol(moduleSymbol);
+            if (exportEquals !== moduleSymbol) {
+                ts.addRange(exports, getPropertiesOfType(getTypeOfSymbol(exportEquals)));
             }
+            return exports;
         }
-        function checkNodePositions(node, aggressiveChecks) {
-            if (aggressiveChecks) {
-                var pos_2 = node.pos;
-                forEachChild(node, function (child) {
-                    ts.Debug.assert(child.pos >= pos_2);
-                    pos_2 = child.end;
-                });
-                ts.Debug.assert(pos_2 <= node.end);
+        function tryGetMemberInModuleExports(memberName, moduleSymbol) {
+            var symbolTable = getExportsOfModule(moduleSymbol);
+            if (symbolTable) {
+                return symbolTable.get(memberName);
             }
         }
-        function updateTokenPositionsAndMarkElements(sourceFile, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta, oldText, newText, aggressiveChecks) {
-            visitNode(sourceFile);
-            return;
-            function visitNode(child) {
-                ts.Debug.assert(child.pos <= child.end);
-                if (child.pos > changeRangeOldEnd) {
-                    // Node is entirely past the change range.  We need to move both its pos and
-                    // end, forward or backward appropriately.
-                    moveElementEntirelyPastChangeRange(child, /*isArray*/ false, delta, oldText, newText, aggressiveChecks);
+        function getExportsOfSymbol(symbol) {
+            return symbol.flags & 1536 /* Module */ ? getExportsOfModule(symbol) : symbol.exports || emptySymbols;
+        }
+        function getExportsOfModule(moduleSymbol) {
+            var links = getSymbolLinks(moduleSymbol);
+            return links.resolvedExports || (links.resolvedExports = getExportsForModule(moduleSymbol));
+        }
+        /**
+         * Extends one symbol table with another while collecting information on name collisions for error message generation into the `lookupTable` argument
+         * Not passing `lookupTable` and `exportNode` disables this collection, and just extends the tables
+         */
+        function extendExportSymbols(target, source, lookupTable, exportNode) {
+            source && source.forEach(function (sourceSymbol, id) {
+                if (id === "default")
                     return;
+                var targetSymbol = target.get(id);
+                if (!targetSymbol) {
+                    target.set(id, sourceSymbol);
+                    if (lookupTable && exportNode) {
+                        lookupTable.set(id, {
+                            specifierText: ts.getTextOfNode(exportNode.moduleSpecifier)
+                        });
+                    }
                 }
-                // Check if the element intersects the change range.  If it does, then it is not
-                // reusable.  Also, we'll need to recurse to see what constituent portions we may
-                // be able to use.
-                var fullEnd = child.end;
-                if (fullEnd >= changeStart) {
-                    child.intersectsChange = true;
-                    child._children = undefined;
-                    // Adjust the pos or end (or both) of the intersecting element accordingly.
-                    adjustIntersectingElement(child, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta);
-                    forEachChild(child, visitNode, visitArray);
-                    checkNodePositions(child, aggressiveChecks);
-                    return;
+                else if (lookupTable && exportNode && targetSymbol && resolveSymbol(targetSymbol) !== resolveSymbol(sourceSymbol)) {
+                    var collisionTracker = lookupTable.get(id);
+                    if (!collisionTracker.exportsWithDuplicate) {
+                        collisionTracker.exportsWithDuplicate = [exportNode];
+                    }
+                    else {
+                        collisionTracker.exportsWithDuplicate.push(exportNode);
+                    }
                 }
-                // Otherwise, the node is entirely before the change range.  No need to do anything with it.
-                ts.Debug.assert(fullEnd < changeStart);
-            }
-            function visitArray(array) {
-                ts.Debug.assert(array.pos <= array.end);
-                if (array.pos > changeRangeOldEnd) {
-                    // Array is entirely after the change range.  We need to move it, and move any of
-                    // its children.
-                    moveElementEntirelyPastChangeRange(array, /*isArray*/ true, delta, oldText, newText, aggressiveChecks);
+            });
+        }
+        function getExportsForModule(moduleSymbol) {
+            var visitedSymbols = [];
+            // A module defined by an 'export=' consists on one export that needs to be resolved
+            moduleSymbol = resolveExternalModuleSymbol(moduleSymbol);
+            return visit(moduleSymbol) || moduleSymbol.exports;
+            // The ES6 spec permits export * declarations in a module to circularly reference the module itself. For example,
+            // module 'a' can 'export * from "b"' and 'b' can 'export * from "a"' without error.
+            function visit(symbol) {
+                if (!(symbol && symbol.flags & 1952 /* HasExports */ && !ts.contains(visitedSymbols, symbol))) {
                     return;
                 }
-                // Check if the element intersects the change range.  If it does, then it is not
-                // reusable.  Also, we'll need to recurse to see what constituent portions we may
-                // be able to use.
-                var fullEnd = array.end;
-                if (fullEnd >= changeStart) {
-                    array.intersectsChange = true;
-                    array._children = undefined;
-                    // Adjust the pos or end (or both) of the intersecting array accordingly.
-                    adjustIntersectingElement(array, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta);
-                    for (var _i = 0, array_9 = array; _i < array_9.length; _i++) {
-                        var node = array_9[_i];
-                        visitNode(node);
+                visitedSymbols.push(symbol);
+                var symbols = ts.cloneMap(symbol.exports);
+                // All export * declarations are collected in an __export symbol by the binder
+                var exportStars = symbol.exports.get("__export");
+                if (exportStars) {
+                    var nestedSymbols = ts.createMap();
+                    var lookupTable_1 = ts.createMap();
+                    for (var _i = 0, _a = exportStars.declarations; _i < _a.length; _i++) {
+                        var node = _a[_i];
+                        var resolvedModule = resolveExternalModuleName(node, node.moduleSpecifier);
+                        var exportedSymbols = visit(resolvedModule);
+                        extendExportSymbols(nestedSymbols, exportedSymbols, lookupTable_1, node);
                     }
-                    return;
+                    lookupTable_1.forEach(function (_a, id) {
+                        var exportsWithDuplicate = _a.exportsWithDuplicate;
+                        // It's not an error if the file with multiple `export *`s with duplicate names exports a member with that name itself
+                        if (id === "export=" || !(exportsWithDuplicate && exportsWithDuplicate.length) || symbols.has(id)) {
+                            return;
+                        }
+                        for (var _i = 0, exportsWithDuplicate_1 = exportsWithDuplicate; _i < exportsWithDuplicate_1.length; _i++) {
+                            var node = exportsWithDuplicate_1[_i];
+                            diagnostics.add(ts.createDiagnosticForNode(node, ts.Diagnostics.Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambiguity, lookupTable_1.get(id).specifierText, id));
+                        }
+                    });
+                    extendExportSymbols(symbols, nestedSymbols);
                 }
-                // Otherwise, the array is entirely before the change range.  No need to do anything with it.
-                ts.Debug.assert(fullEnd < changeStart);
+                return symbols;
             }
         }
-        function extendToAffectedRange(sourceFile, changeRange) {
-            // Consider the following code:
-            //      void foo() { /; }
-            //
-            // If the text changes with an insertion of / just before the semicolon then we end up with:
-            //      void foo() { //; }
-            //
-            // If we were to just use the changeRange a is, then we would not rescan the { token
-            // (as it does not intersect the actual original change range).  Because an edit may
-            // change the token touching it, we actually need to look back *at least* one token so
-            // that the prior token sees that change.
-            var maxLookahead = 1;
-            var start = changeRange.span.start;
-            // the first iteration aligns us with the change start. subsequent iteration move us to
-            // the left by maxLookahead tokens.  We only need to do this as long as we're not at the
-            // start of the tree.
-            for (var i = 0; start > 0 && i <= maxLookahead; i++) {
-                var nearestNode = findNearestNodeStartingBeforeOrAtPosition(sourceFile, start);
-                ts.Debug.assert(nearestNode.pos <= start);
-                var position = nearestNode.pos;
-                start = Math.max(0, position - 1);
+        function getMergedSymbol(symbol) {
+            var merged;
+            return symbol && symbol.mergeId && (merged = mergedSymbols[symbol.mergeId]) ? merged : symbol;
+        }
+        function getSymbolOfNode(node) {
+            return getMergedSymbol(node.symbol);
+        }
+        function getParentOfSymbol(symbol) {
+            return getMergedSymbol(symbol.parent);
+        }
+        function getExportSymbolOfValueSymbolIfExported(symbol) {
+            return symbol && (symbol.flags & 1048576 /* ExportValue */) !== 0
+                ? getMergedSymbol(symbol.exportSymbol)
+                : symbol;
+        }
+        function symbolIsValue(symbol) {
+            return !!(symbol.flags & 107455 /* Value */ || symbol.flags & 8388608 /* Alias */ && resolveAlias(symbol).flags & 107455 /* Value */);
+        }
+        function findConstructorDeclaration(node) {
+            var members = node.members;
+            for (var _i = 0, members_2 = members; _i < members_2.length; _i++) {
+                var member = members_2[_i];
+                if (member.kind === 152 /* Constructor */ && ts.nodeIsPresent(member.body)) {
+                    return member;
+                }
             }
-            var finalSpan = ts.createTextSpanFromBounds(start, ts.textSpanEnd(changeRange.span));
-            var finalLength = changeRange.newLength + (changeRange.span.start - start);
-            return ts.createTextChangeRange(finalSpan, finalLength);
         }
-        function findNearestNodeStartingBeforeOrAtPosition(sourceFile, position) {
-            var bestResult = sourceFile;
-            var lastNodeEntirelyBeforePosition;
-            forEachChild(sourceFile, visit);
-            if (lastNodeEntirelyBeforePosition) {
-                var lastChildOfLastEntireNodeBeforePosition = getLastChild(lastNodeEntirelyBeforePosition);
-                if (lastChildOfLastEntireNodeBeforePosition.pos > bestResult.pos) {
-                    bestResult = lastChildOfLastEntireNodeBeforePosition;
+        function createType(flags) {
+            var result = new Type(checker, flags);
+            typeCount++;
+            result.id = typeCount;
+            return result;
+        }
+        function createIntrinsicType(kind, intrinsicName) {
+            var type = createType(kind);
+            type.intrinsicName = intrinsicName;
+            return type;
+        }
+        function createBooleanType(trueFalseTypes) {
+            var type = getUnionType(trueFalseTypes);
+            type.flags |= 8 /* Boolean */;
+            type.intrinsicName = "boolean";
+            return type;
+        }
+        function createObjectType(objectFlags, symbol) {
+            var type = createType(32768 /* Object */);
+            type.objectFlags = objectFlags;
+            type.symbol = symbol;
+            return type;
+        }
+        function createTypeofType() {
+            return getUnionType(ts.convertToArray(typeofEQFacts.keys(), getLiteralType));
+        }
+        // A reserved member name starts with two underscores, but the third character cannot be an underscore
+        // or the @ symbol. A third underscore indicates an escaped form of an identifer that started
+        // with at least two underscores. The @ character indicates that the name is denoted by a well known ES
+        // Symbol instance.
+        function isReservedMemberName(name) {
+            return name.charCodeAt(0) === 95 /* _ */ &&
+                name.charCodeAt(1) === 95 /* _ */ &&
+                name.charCodeAt(2) !== 95 /* _ */ &&
+                name.charCodeAt(2) !== 64 /* at */;
+        }
+        function getNamedMembers(members) {
+            var result;
+            members.forEach(function (symbol, id) {
+                if (!isReservedMemberName(id)) {
+                    if (!result)
+                        result = [];
+                    if (symbolIsValue(symbol)) {
+                        result.push(symbol);
+                    }
+                }
+            });
+            return result || emptyArray;
+        }
+        function setStructuredTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo) {
+            type.members = members;
+            type.properties = getNamedMembers(members);
+            type.callSignatures = callSignatures;
+            type.constructSignatures = constructSignatures;
+            if (stringIndexInfo)
+                type.stringIndexInfo = stringIndexInfo;
+            if (numberIndexInfo)
+                type.numberIndexInfo = numberIndexInfo;
+            return type;
+        }
+        function createAnonymousType(symbol, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo) {
+            return setStructuredTypeMembers(createObjectType(16 /* Anonymous */, symbol), members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+        }
+        function forEachSymbolTableInScope(enclosingDeclaration, callback) {
+            var result;
+            for (var location_1 = enclosingDeclaration; location_1; location_1 = location_1.parent) {
+                // Locals of a source file are not in scope (because they get merged into the global symbol table)
+                if (location_1.locals && !isGlobalSourceFile(location_1)) {
+                    if (result = callback(location_1.locals)) {
+                        return result;
+                    }
+                }
+                switch (location_1.kind) {
+                    case 265 /* SourceFile */:
+                        if (!ts.isExternalOrCommonJsModule(location_1)) {
+                            break;
+                        }
+                    // falls through
+                    case 233 /* ModuleDeclaration */:
+                        if (result = callback(getSymbolOfNode(location_1).exports)) {
+                            return result;
+                        }
+                        break;
                 }
             }
-            return bestResult;
-            function getLastChild(node) {
-                while (true) {
-                    var lastChild = getLastChildWorker(node);
-                    if (lastChild) {
-                        node = lastChild;
+            return callback(globals);
+        }
+        function getQualifiedLeftMeaning(rightMeaning) {
+            // If we are looking in value space, the parent meaning is value, other wise it is namespace
+            return rightMeaning === 107455 /* Value */ ? 107455 /* Value */ : 1920 /* Namespace */;
+        }
+        function getAccessibleSymbolChain(symbol, enclosingDeclaration, meaning, useOnlyExternalAliasing) {
+            function getAccessibleSymbolChainFromSymbolTable(symbols) {
+                return getAccessibleSymbolChainFromSymbolTableWorker(symbols, []);
+            }
+            function getAccessibleSymbolChainFromSymbolTableWorker(symbols, visitedSymbolTables) {
+                if (ts.contains(visitedSymbolTables, symbols)) {
+                    return undefined;
+                }
+                visitedSymbolTables.push(symbols);
+                var result = trySymbolTable(symbols);
+                visitedSymbolTables.pop();
+                return result;
+                function canQualifySymbol(symbolFromSymbolTable, meaning) {
+                    // If the symbol is equivalent and doesn't need further qualification, this symbol is accessible
+                    if (!needsQualification(symbolFromSymbolTable, enclosingDeclaration, meaning)) {
+                        return true;
                     }
-                    else {
-                        return node;
+                    // If symbol needs qualification, make sure that parent is accessible, if it is then this symbol is accessible too
+                    var accessibleParent = getAccessibleSymbolChain(symbolFromSymbolTable.parent, enclosingDeclaration, getQualifiedLeftMeaning(meaning), useOnlyExternalAliasing);
+                    return !!accessibleParent;
+                }
+                function isAccessible(symbolFromSymbolTable, resolvedAliasSymbol) {
+                    if (symbol === (resolvedAliasSymbol || symbolFromSymbolTable)) {
+                        // if the symbolFromSymbolTable is not external module (it could be if it was determined as ambient external module and would be in globals table)
+                        // and if symbolFromSymbolTable or alias resolution matches the symbol,
+                        // check the symbol can be qualified, it is only then this symbol is accessible
+                        return !ts.forEach(symbolFromSymbolTable.declarations, hasExternalModuleSymbol) &&
+                            canQualifySymbol(symbolFromSymbolTable, meaning);
                     }
                 }
+                function trySymbolTable(symbols) {
+                    // If symbol is directly available by its name in the symbol table
+                    if (isAccessible(symbols.get(symbol.name))) {
+                        return [symbol];
+                    }
+                    // Check if symbol is any of the alias
+                    return ts.forEachEntry(symbols, function (symbolFromSymbolTable) {
+                        if (symbolFromSymbolTable.flags & 8388608 /* Alias */
+                            && symbolFromSymbolTable.name !== "export="
+                            && !ts.getDeclarationOfKind(symbolFromSymbolTable, 246 /* ExportSpecifier */)) {
+                            if (!useOnlyExternalAliasing ||
+                                // Is this external alias, then use it to name
+                                ts.forEach(symbolFromSymbolTable.declarations, ts.isExternalModuleImportEqualsDeclaration)) {
+                                var resolvedImportedSymbol = resolveAlias(symbolFromSymbolTable);
+                                if (isAccessible(symbolFromSymbolTable, resolvedImportedSymbol)) {
+                                    return [symbolFromSymbolTable];
+                                }
+                                // Look in the exported members, if we can find accessibleSymbolChain, symbol is accessible using this chain
+                                // but only if the symbolFromSymbolTable can be qualified
+                                var accessibleSymbolsFromExports = resolvedImportedSymbol.exports ? getAccessibleSymbolChainFromSymbolTableWorker(resolvedImportedSymbol.exports, visitedSymbolTables) : undefined;
+                                if (accessibleSymbolsFromExports && canQualifySymbol(symbolFromSymbolTable, getQualifiedLeftMeaning(meaning))) {
+                                    return [symbolFromSymbolTable].concat(accessibleSymbolsFromExports);
+                                }
+                            }
+                        }
+                    });
+                }
             }
-            function getLastChildWorker(node) {
-                var last = undefined;
-                forEachChild(node, function (child) {
-                    if (ts.nodeIsPresent(child)) {
-                        last = child;
-                    }
-                });
-                return last;
+            if (symbol) {
+                if (!(isPropertyOrMethodDeclarationSymbol(symbol))) {
+                    return forEachSymbolTableInScope(enclosingDeclaration, getAccessibleSymbolChainFromSymbolTable);
+                }
             }
-            function visit(child) {
-                if (ts.nodeIsMissing(child)) {
-                    // Missing nodes are effectively invisible to us.  We never even consider them
-                    // When trying to find the nearest node before us.
-                    return;
+        }
+        function needsQualification(symbol, enclosingDeclaration, meaning) {
+            var qualify = false;
+            forEachSymbolTableInScope(enclosingDeclaration, function (symbolTable) {
+                // If symbol of this name is not available in the symbol table we are ok
+                var symbolFromSymbolTable = symbolTable.get(symbol.name);
+                if (!symbolFromSymbolTable) {
+                    // Continue to the next symbol table
+                    return false;
                 }
-                // If the child intersects this position, then this node is currently the nearest
-                // node that starts before the position.
-                if (child.pos <= position) {
-                    if (child.pos >= bestResult.pos) {
-                        // This node starts before the position, and is closer to the position than
-                        // the previous best node we found.  It is now the new best node.
-                        bestResult = child;
-                    }
-                    // Now, the node may overlap the position, or it may end entirely before the
-                    // position.  If it overlaps with the position, then either it, or one of its
-                    // children must be the nearest node before the position.  So we can just
-                    // recurse into this child to see if we can find something better.
-                    if (position < child.end) {
-                        // The nearest node is either this child, or one of the children inside
-                        // of it.  We've already marked this child as the best so far.  Recurse
-                        // in case one of the children is better.
-                        forEachChild(child, visit);
-                        // Once we look at the children of this node, then there's no need to
-                        // continue any further.
-                        return true;
-                    }
-                    else {
-                        ts.Debug.assert(child.end <= position);
-                        // The child ends entirely before this position.  Say you have the following
-                        // (where $ is the position)
-                        //
-                        //      <complex expr 1> ? <complex expr 2> $ : <...> <...>
-                        //
-                        // We would want to find the nearest preceding node in "complex expr 2".
-                        // To support that, we keep track of this node, and once we're done searching
-                        // for a best node, we recurse down this node to see if we can find a good
-                        // result in it.
-                        //
-                        // This approach allows us to quickly skip over nodes that are entirely
-                        // before the position, while still allowing us to find any nodes in the
-                        // last one that might be what we want.
-                        lastNodeEntirelyBeforePosition = child;
-                    }
+                // If the symbol with this name is present it should refer to the symbol
+                if (symbolFromSymbolTable === symbol) {
+                    // No need to qualify
+                    return true;
                 }
-                else {
-                    ts.Debug.assert(child.pos > position);
-                    // We're now at a node that is entirely past the position we're searching for.
-                    // This node (and all following nodes) could never contribute to the result,
-                    // so just skip them by returning 'true' here.
+                // Qualify if the symbol from symbol table has same meaning as expected
+                symbolFromSymbolTable = (symbolFromSymbolTable.flags & 8388608 /* Alias */ && !ts.getDeclarationOfKind(symbolFromSymbolTable, 246 /* ExportSpecifier */)) ? resolveAlias(symbolFromSymbolTable) : symbolFromSymbolTable;
+                if (symbolFromSymbolTable.flags & meaning) {
+                    qualify = true;
                     return true;
                 }
-            }
+                // Continue to the next symbol table
+                return false;
+            });
+            return qualify;
         }
-        function checkChangeRange(sourceFile, newText, textChangeRange, aggressiveChecks) {
-            var oldText = sourceFile.text;
-            if (textChangeRange) {
-                ts.Debug.assert((oldText.length - textChangeRange.span.length + textChangeRange.newLength) === newText.length);
-                if (aggressiveChecks || ts.Debug.shouldAssert(3 /* VeryAggressive */)) {
-                    var oldTextPrefix = oldText.substr(0, textChangeRange.span.start);
-                    var newTextPrefix = newText.substr(0, textChangeRange.span.start);
-                    ts.Debug.assert(oldTextPrefix === newTextPrefix);
-                    var oldTextSuffix = oldText.substring(ts.textSpanEnd(textChangeRange.span), oldText.length);
-                    var newTextSuffix = newText.substring(ts.textSpanEnd(ts.textChangeRangeNewSpan(textChangeRange)), newText.length);
-                    ts.Debug.assert(oldTextSuffix === newTextSuffix);
+        function isPropertyOrMethodDeclarationSymbol(symbol) {
+            if (symbol.declarations && symbol.declarations.length) {
+                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                    var declaration = _a[_i];
+                    switch (declaration.kind) {
+                        case 149 /* PropertyDeclaration */:
+                        case 151 /* MethodDeclaration */:
+                        case 153 /* GetAccessor */:
+                        case 154 /* SetAccessor */:
+                            continue;
+                        default:
+                            return false;
+                    }
                 }
+                return true;
             }
+            return false;
         }
-        function createSyntaxCursor(sourceFile) {
-            var currentArray = sourceFile.statements;
-            var currentArrayIndex = 0;
-            ts.Debug.assert(currentArrayIndex < currentArray.length);
-            var current = currentArray[currentArrayIndex];
-            var lastQueriedPosition = -1 /* Value */;
-            return {
-                currentNode: function (position) {
-                    // Only compute the current node if the position is different than the last time
-                    // we were asked.  The parser commonly asks for the node at the same position
-                    // twice.  Once to know if can read an appropriate list element at a certain point,
-                    // and then to actually read and consume the node.
-                    if (position !== lastQueriedPosition) {
-                        // Much of the time the parser will need the very next node in the array that
-                        // we just returned a node from.So just simply check for that case and move
-                        // forward in the array instead of searching for the node again.
-                        if (current && current.end === position && currentArrayIndex < (currentArray.length - 1)) {
-                            currentArrayIndex++;
-                            current = currentArray[currentArrayIndex];
-                        }
-                        // If we don't have a node, or the node we have isn't in the right position,
-                        // then try to find a viable node at the position requested.
-                        if (!current || current.pos !== position) {
-                            findHighestListElementThatStartsAtPosition(position);
+        /**
+         * Check if the given symbol in given enclosing declaration is accessible and mark all associated alias to be visible if requested
+         *
+         * @param symbol a Symbol to check if accessible
+         * @param enclosingDeclaration a Node containing reference to the symbol
+         * @param meaning a SymbolFlags to check if such meaning of the symbol is accessible
+         * @param shouldComputeAliasToMakeVisible a boolean value to indicate whether to return aliases to be mark visible in case the symbol is accessible
+         */
+        function isSymbolAccessible(symbol, enclosingDeclaration, meaning, shouldComputeAliasesToMakeVisible) {
+            if (symbol && enclosingDeclaration && !(symbol.flags & 262144 /* TypeParameter */)) {
+                var initialSymbol = symbol;
+                var meaningToLook = meaning;
+                while (symbol) {
+                    // Symbol is accessible if it by itself is accessible
+                    var accessibleSymbolChain = getAccessibleSymbolChain(symbol, enclosingDeclaration, meaningToLook, /*useOnlyExternalAliasing*/ false);
+                    if (accessibleSymbolChain) {
+                        var hasAccessibleDeclarations = hasVisibleDeclarations(accessibleSymbolChain[0], shouldComputeAliasesToMakeVisible);
+                        if (!hasAccessibleDeclarations) {
+                            return {
+                                accessibility: 1 /* NotAccessible */,
+                                errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning),
+                                errorModuleName: symbol !== initialSymbol ? symbolToString(symbol, enclosingDeclaration, 1920 /* Namespace */) : undefined,
+                            };
                         }
+                        return hasAccessibleDeclarations;
                     }
-                    // Cache this query so that we don't do any extra work if the parser calls back
-                    // into us.  Note: this is very common as the parser will make pairs of calls like
-                    // 'isListElement -> parseListElement'.  If we were unable to find a node when
-                    // called with 'isListElement', we don't want to redo the work when parseListElement
-                    // is called immediately after.
-                    lastQueriedPosition = position;
-                    // Either we don'd have a node, or we have a node at the position being asked for.
-                    ts.Debug.assert(!current || current.pos === position);
-                    return current;
+                    // If we haven't got the accessible symbol, it doesn't mean the symbol is actually inaccessible.
+                    // It could be a qualified symbol and hence verify the path
+                    // e.g.:
+                    // module m {
+                    //     export class c {
+                    //     }
+                    // }
+                    // const x: typeof m.c
+                    // In the above example when we start with checking if typeof m.c symbol is accessible,
+                    // we are going to see if c can be accessed in scope directly.
+                    // But it can't, hence the accessible is going to be undefined, but that doesn't mean m.c is inaccessible
+                    // It is accessible if the parent m is accessible because then m.c can be accessed through qualification
+                    meaningToLook = getQualifiedLeftMeaning(meaning);
+                    symbol = getParentOfSymbol(symbol);
                 }
-            };
-            // Finds the highest element in the tree we can find that starts at the provided position.
-            // The element must be a direct child of some node list in the tree.  This way after we
-            // return it, we can easily return its next sibling in the list.
-            function findHighestListElementThatStartsAtPosition(position) {
-                // Clear out any cached state about the last node we found.
-                currentArray = undefined;
-                currentArrayIndex = -1 /* Value */;
-                current = undefined;
-                // Recurse into the source file to find the highest node at this position.
-                forEachChild(sourceFile, visitNode, visitArray);
-                return;
-                function visitNode(node) {
-                    if (position >= node.pos && position < node.end) {
-                        // Position was within this node.  Keep searching deeper to find the node.
-                        forEachChild(node, visitNode, visitArray);
-                        // don't proceed any further in the search.
-                        return true;
+                // This could be a symbol that is not exported in the external module
+                // or it could be a symbol from different external module that is not aliased and hence cannot be named
+                var symbolExternalModule = ts.forEach(initialSymbol.declarations, getExternalModuleContainer);
+                if (symbolExternalModule) {
+                    var enclosingExternalModule = getExternalModuleContainer(enclosingDeclaration);
+                    if (symbolExternalModule !== enclosingExternalModule) {
+                        // name from different external module that is not visible
+                        return {
+                            accessibility: 2 /* CannotBeNamed */,
+                            errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning),
+                            errorModuleName: symbolToString(symbolExternalModule)
+                        };
                     }
-                    // position wasn't in this node, have to keep searching.
-                    return false;
                 }
-                function visitArray(array) {
-                    if (position >= array.pos && position < array.end) {
-                        // position was in this array.  Search through this array to see if we find a
-                        // viable element.
-                        for (var i = 0, n = array.length; i < n; i++) {
-                            var child = array[i];
-                            if (child) {
-                                if (child.pos === position) {
-                                    // Found the right node.  We're done.
-                                    currentArray = array;
-                                    currentArrayIndex = i;
-                                    current = child;
-                                    return true;
-                                }
-                                else {
-                                    if (child.pos < position && position < child.end) {
-                                        // Position in somewhere within this child.  Search in it and
-                                        // stop searching in this array.
-                                        forEachChild(child, visitNode, visitArray);
-                                        return true;
-                                    }
+                // Just a local name that is not accessible
+                return {
+                    accessibility: 1 /* NotAccessible */,
+                    errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning),
+                };
+            }
+            return { accessibility: 0 /* Accessible */ };
+            function getExternalModuleContainer(declaration) {
+                var node = ts.findAncestor(declaration, hasExternalModuleSymbol);
+                return node && getSymbolOfNode(node);
+            }
+        }
+        function hasExternalModuleSymbol(declaration) {
+            return ts.isAmbientModule(declaration) || (declaration.kind === 265 /* SourceFile */ && ts.isExternalOrCommonJsModule(declaration));
+        }
+        function hasVisibleDeclarations(symbol, shouldComputeAliasToMakeVisible) {
+            var aliasesToMakeVisible;
+            if (ts.forEach(symbol.declarations, function (declaration) { return !getIsDeclarationVisible(declaration); })) {
+                return undefined;
+            }
+            return { accessibility: 0 /* Accessible */, aliasesToMakeVisible: aliasesToMakeVisible };
+            function getIsDeclarationVisible(declaration) {
+                if (!isDeclarationVisible(declaration)) {
+                    // Mark the unexported alias as visible if its parent is visible
+                    // because these kind of aliases can be used to name types in declaration file
+                    var anyImportSyntax = getAnyImportSyntax(declaration);
+                    if (anyImportSyntax &&
+                        !(ts.getModifierFlags(anyImportSyntax) & 1 /* Export */) &&
+                        isDeclarationVisible(anyImportSyntax.parent)) {
+                        // In function "buildTypeDisplay" where we decide whether to write type-alias or serialize types,
+                        // we want to just check if type- alias is accessible or not but we don't care about emitting those alias at that time
+                        // since we will do the emitting later in trackSymbol.
+                        if (shouldComputeAliasToMakeVisible) {
+                            getNodeLinks(declaration).isVisible = true;
+                            if (aliasesToMakeVisible) {
+                                if (!ts.contains(aliasesToMakeVisible, anyImportSyntax)) {
+                                    aliasesToMakeVisible.push(anyImportSyntax);
                                 }
                             }
+                            else {
+                                aliasesToMakeVisible = [anyImportSyntax];
+                            }
                         }
+                        return true;
                     }
-                    // position wasn't in this array, have to keep searching.
+                    // Declaration is not visible
                     return false;
                 }
+                return true;
             }
         }
-        var InvalidPosition;
-        (function (InvalidPosition) {
-            InvalidPosition[InvalidPosition["Value"] = -1] = "Value";
-        })(InvalidPosition || (InvalidPosition = {}));
-    })(IncrementalParser || (IncrementalParser = {}));
-})(ts || (ts = {}));
-/// <reference path="utilities.ts"/>
-/// <reference path="parser.ts"/>
-/* @internal */
-var ts;
-(function (ts) {
-    (function (ModuleInstanceState) {
-        ModuleInstanceState[ModuleInstanceState["NonInstantiated"] = 0] = "NonInstantiated";
-        ModuleInstanceState[ModuleInstanceState["Instantiated"] = 1] = "Instantiated";
-        ModuleInstanceState[ModuleInstanceState["ConstEnumOnly"] = 2] = "ConstEnumOnly";
-    })(ts.ModuleInstanceState || (ts.ModuleInstanceState = {}));
-    var ModuleInstanceState = ts.ModuleInstanceState;
-    function getModuleInstanceState(node) {
-        // A module is uninstantiated if it contains only
-        // 1. interface declarations, type alias declarations
-        if (node.kind === 222 /* InterfaceDeclaration */ || node.kind === 223 /* TypeAliasDeclaration */) {
-            return 0 /* NonInstantiated */;
-        }
-        else if (ts.isConstEnumDeclaration(node)) {
-            return 2 /* ConstEnumOnly */;
-        }
-        else if ((node.kind === 230 /* ImportDeclaration */ || node.kind === 229 /* ImportEqualsDeclaration */) && !(ts.hasModifier(node, 1 /* Export */))) {
-            return 0 /* NonInstantiated */;
+        function isEntityNameVisible(entityName, enclosingDeclaration) {
+            // get symbol of the first identifier of the entityName
+            var meaning;
+            if (entityName.parent.kind === 162 /* TypeQuery */ || ts.isExpressionWithTypeArgumentsInClassExtendsClause(entityName.parent)) {
+                // Typeof value
+                meaning = 107455 /* Value */ | 1048576 /* ExportValue */;
+            }
+            else if (entityName.kind === 143 /* QualifiedName */ || entityName.kind === 179 /* PropertyAccessExpression */ ||
+                entityName.parent.kind === 237 /* ImportEqualsDeclaration */) {
+                // Left identifier from type reference or TypeAlias
+                // Entity name of the import declaration
+                meaning = 1920 /* Namespace */;
+            }
+            else {
+                // Type Reference or TypeAlias entity = Identifier
+                meaning = 793064 /* Type */;
+            }
+            var firstIdentifier = getFirstIdentifier(entityName);
+            var symbol = resolveName(enclosingDeclaration, firstIdentifier.text, meaning, /*nodeNotFoundErrorMessage*/ undefined, /*nameArg*/ undefined);
+            // Verify if the symbol is accessible
+            return (symbol && hasVisibleDeclarations(symbol, /*shouldComputeAliasToMakeVisible*/ true)) || {
+                accessibility: 1 /* NotAccessible */,
+                errorSymbolName: ts.getTextOfNode(firstIdentifier),
+                errorNode: firstIdentifier
+            };
         }
-        else if (node.kind === 226 /* ModuleBlock */) {
-            var state_1 = 0 /* NonInstantiated */;
-            ts.forEachChild(node, function (n) {
-                switch (getModuleInstanceState(n)) {
-                    case 0 /* NonInstantiated */:
-                        // child is non-instantiated - continue searching
-                        return false;
-                    case 2 /* ConstEnumOnly */:
-                        // child is const enum only - record state and continue searching
-                        state_1 = 2 /* ConstEnumOnly */;
-                        return false;
-                    case 1 /* Instantiated */:
-                        // child is instantiated - record state and stop
-                        state_1 = 1 /* Instantiated */;
-                        return true;
-                }
-            });
-            return state_1;
+        function writeKeyword(writer, kind) {
+            writer.writeKeyword(ts.tokenToString(kind));
         }
-        else if (node.kind === 225 /* ModuleDeclaration */) {
-            var body = node.body;
-            return body ? getModuleInstanceState(body) : 1 /* Instantiated */;
+        function writePunctuation(writer, kind) {
+            writer.writePunctuation(ts.tokenToString(kind));
         }
-        else {
-            return 1 /* Instantiated */;
+        function writeSpace(writer) {
+            writer.writeSpace(" ");
         }
-    }
-    ts.getModuleInstanceState = getModuleInstanceState;
-    var ContainerFlags;
-    (function (ContainerFlags) {
-        // The current node is not a container, and no container manipulation should happen before
-        // recursing into it.
-        ContainerFlags[ContainerFlags["None"] = 0] = "None";
-        // The current node is a container.  It should be set as the current container (and block-
-        // container) before recursing into it.  The current node does not have locals.  Examples:
-        //
-        //      Classes, ObjectLiterals, TypeLiterals, Interfaces...
-        ContainerFlags[ContainerFlags["IsContainer"] = 1] = "IsContainer";
-        // The current node is a block-scoped-container.  It should be set as the current block-
-        // container before recursing into it.  Examples:
-        //
-        //      Blocks (when not parented by functions), Catch clauses, For/For-in/For-of statements...
-        ContainerFlags[ContainerFlags["IsBlockScopedContainer"] = 2] = "IsBlockScopedContainer";
-        // The current node is the container of a control flow path. The current control flow should
-        // be saved and restored, and a new control flow initialized within the container.
-        ContainerFlags[ContainerFlags["IsControlFlowContainer"] = 4] = "IsControlFlowContainer";
-        ContainerFlags[ContainerFlags["IsFunctionLike"] = 8] = "IsFunctionLike";
-        ContainerFlags[ContainerFlags["IsFunctionExpression"] = 16] = "IsFunctionExpression";
-        ContainerFlags[ContainerFlags["HasLocals"] = 32] = "HasLocals";
-        ContainerFlags[ContainerFlags["IsInterface"] = 64] = "IsInterface";
-    })(ContainerFlags || (ContainerFlags = {}));
-    var binder = createBinder();
-    function bindSourceFile(file, options) {
-        ts.performance.mark("beforeBind");
-        binder(file, options);
-        ts.performance.mark("afterBind");
-        ts.performance.measure("Bind", "beforeBind", "afterBind");
-    }
-    ts.bindSourceFile = bindSourceFile;
-    function createBinder() {
-        var file;
-        var options;
-        var languageVersion;
-        var parent;
-        var container;
-        var blockScopeContainer;
-        var lastContainer;
-        var seenThisKeyword;
-        // state used by control flow analysis
-        var currentFlow;
-        var currentBreakTarget;
-        var currentContinueTarget;
-        var currentReturnTarget;
-        var currentTrueTarget;
-        var currentFalseTarget;
-        var preSwitchCaseFlow;
-        var activeLabels;
-        var hasExplicitReturn;
-        // state used for emit helpers
-        var emitFlags;
-        // If this file is an external module, then it is automatically in strict-mode according to
-        // ES6.  If it is not an external module, then we'll determine if it is in strict mode or
-        // not depending on if we see "use strict" in certain places (or if we hit a class/namespace).
-        var inStrictMode;
-        var symbolCount = 0;
-        var Symbol;
-        var classifiableNames;
-        var unreachableFlow = { flags: 1 /* Unreachable */ };
-        var reportedUnreachableFlow = { flags: 1 /* Unreachable */ };
-        // state used to aggregate transform flags during bind.
-        var subtreeTransformFlags = 0 /* None */;
-        var skipTransformFlagAggregation;
-        function bindSourceFile(f, opts) {
-            file = f;
-            options = opts;
-            languageVersion = ts.getEmitScriptTarget(options);
-            inStrictMode = !!file.externalModuleIndicator;
-            classifiableNames = ts.createMap();
-            symbolCount = 0;
-            skipTransformFlagAggregation = ts.isDeclarationFile(file);
-            Symbol = ts.objectAllocator.getSymbolConstructor();
-            if (!file.locals) {
-                bind(file);
-                file.symbolCount = symbolCount;
-                file.classifiableNames = classifiableNames;
-            }
-            file = undefined;
-            options = undefined;
-            languageVersion = undefined;
-            parent = undefined;
-            container = undefined;
-            blockScopeContainer = undefined;
-            lastContainer = undefined;
-            seenThisKeyword = false;
-            currentFlow = undefined;
-            currentBreakTarget = undefined;
-            currentContinueTarget = undefined;
-            currentReturnTarget = undefined;
-            currentTrueTarget = undefined;
-            currentFalseTarget = undefined;
-            activeLabels = undefined;
-            hasExplicitReturn = false;
-            emitFlags = 0 /* None */;
-            subtreeTransformFlags = 0 /* None */;
+        function symbolToString(symbol, enclosingDeclaration, meaning) {
+            var writer = ts.getSingleLineStringWriter();
+            getSymbolDisplayBuilder().buildSymbolDisplay(symbol, writer, enclosingDeclaration, meaning);
+            var result = writer.string();
+            ts.releaseStringWriter(writer);
+            return result;
         }
-        return bindSourceFile;
-        function createSymbol(flags, name) {
-            symbolCount++;
-            return new Symbol(flags, name);
+        function signatureToString(signature, enclosingDeclaration, flags, kind) {
+            var writer = ts.getSingleLineStringWriter();
+            getSymbolDisplayBuilder().buildSignatureDisplay(signature, writer, enclosingDeclaration, flags, kind);
+            var result = writer.string();
+            ts.releaseStringWriter(writer);
+            return result;
         }
-        function addDeclarationToSymbol(symbol, node, symbolFlags) {
-            symbol.flags |= symbolFlags;
-            node.symbol = symbol;
-            if (!symbol.declarations) {
-                symbol.declarations = [];
-            }
-            symbol.declarations.push(node);
-            if (symbolFlags & 1952 /* HasExports */ && !symbol.exports) {
-                symbol.exports = ts.createMap();
+        function typeToString(type, enclosingDeclaration, flags) {
+            var typeNode = nodeBuilder.typeToTypeNode(type, enclosingDeclaration, toNodeBuilderFlags(flags) | ts.NodeBuilderFlags.IgnoreErrors | ts.NodeBuilderFlags.WriteTypeParametersInQualifiedName);
+            ts.Debug.assert(typeNode !== undefined, "should always get typenode");
+            var options = { removeComments: true };
+            var writer = ts.createTextWriter("");
+            var printer = ts.createPrinter(options);
+            var sourceFile = enclosingDeclaration && ts.getSourceFileOfNode(enclosingDeclaration);
+            printer.writeNode(3 /* Unspecified */, typeNode, /*sourceFile*/ sourceFile, writer);
+            var result = writer.getText();
+            var maxLength = compilerOptions.noErrorTruncation || flags & 8 /* NoTruncation */ ? undefined : 100;
+            if (maxLength && result.length >= maxLength) {
+                return result.substr(0, maxLength - "...".length) + "...";
             }
-            if (symbolFlags & 6240 /* HasMembers */ && !symbol.members) {
-                symbol.members = ts.createMap();
+            return result;
+            function toNodeBuilderFlags(flags) {
+                var result = ts.NodeBuilderFlags.None;
+                if (!flags) {
+                    return result;
+                }
+                if (flags & 8 /* NoTruncation */) {
+                    result |= ts.NodeBuilderFlags.NoTruncation;
+                }
+                if (flags & 256 /* UseFullyQualifiedType */) {
+                    result |= ts.NodeBuilderFlags.UseFullyQualifiedType;
+                }
+                if (flags & 4096 /* SuppressAnyReturnType */) {
+                    result |= ts.NodeBuilderFlags.SuppressAnyReturnType;
+                }
+                if (flags & 1 /* WriteArrayAsGenericType */) {
+                    result |= ts.NodeBuilderFlags.WriteArrayAsGenericType;
+                }
+                if (flags & 64 /* WriteTypeArgumentsOfSignature */) {
+                    result |= ts.NodeBuilderFlags.WriteTypeArgumentsOfSignature;
+                }
+                return result;
             }
-            if (symbolFlags & 107455 /* Value */) {
-                var valueDeclaration = symbol.valueDeclaration;
-                if (!valueDeclaration ||
-                    (valueDeclaration.kind !== node.kind && valueDeclaration.kind === 225 /* ModuleDeclaration */)) {
-                    // other kinds of value declarations take precedence over modules
-                    symbol.valueDeclaration = node;
+        }
+        function createNodeBuilder() {
+            return {
+                typeToTypeNode: function (type, enclosingDeclaration, flags) {
+                    var context = createNodeBuilderContext(enclosingDeclaration, flags);
+                    var resultingNode = typeToTypeNodeHelper(type, context);
+                    var result = context.encounteredError ? undefined : resultingNode;
+                    return result;
+                },
+                indexInfoToIndexSignatureDeclaration: function (indexInfo, kind, enclosingDeclaration, flags) {
+                    var context = createNodeBuilderContext(enclosingDeclaration, flags);
+                    var resultingNode = indexInfoToIndexSignatureDeclarationHelper(indexInfo, kind, context);
+                    var result = context.encounteredError ? undefined : resultingNode;
+                    return result;
+                },
+                signatureToSignatureDeclaration: function (signature, kind, enclosingDeclaration, flags) {
+                    var context = createNodeBuilderContext(enclosingDeclaration, flags);
+                    var resultingNode = signatureToSignatureDeclarationHelper(signature, kind, context);
+                    var result = context.encounteredError ? undefined : resultingNode;
+                    return result;
                 }
+            };
+            function createNodeBuilderContext(enclosingDeclaration, flags) {
+                return {
+                    enclosingDeclaration: enclosingDeclaration,
+                    flags: flags,
+                    encounteredError: false,
+                    symbolStack: undefined
+                };
             }
-        }
-        // Should not be called on a declaration with a computed property name,
-        // unless it is a well known Symbol.
-        function getDeclarationName(node) {
-            if (node.name) {
-                if (ts.isAmbientModule(node)) {
-                    return ts.isGlobalScopeAugmentation(node) ? "__global" : "\"" + node.name.text + "\"";
+            function typeToTypeNodeHelper(type, context) {
+                var inTypeAlias = context.flags & ts.NodeBuilderFlags.InTypeAlias;
+                context.flags &= ~ts.NodeBuilderFlags.InTypeAlias;
+                if (!type) {
+                    context.encounteredError = true;
+                    return undefined;
                 }
-                if (node.name.kind === 140 /* ComputedPropertyName */) {
-                    var nameExpression = node.name.expression;
-                    // treat computed property names where expression is string/numeric literal as just string/numeric literal
-                    if (ts.isStringOrNumericLiteral(nameExpression.kind)) {
-                        return nameExpression.text;
+                if (type.flags & 1 /* Any */) {
+                    return ts.createKeywordTypeNode(119 /* AnyKeyword */);
+                }
+                if (type.flags & 2 /* String */) {
+                    return ts.createKeywordTypeNode(136 /* StringKeyword */);
+                }
+                if (type.flags & 4 /* Number */) {
+                    return ts.createKeywordTypeNode(133 /* NumberKeyword */);
+                }
+                if (type.flags & 8 /* Boolean */) {
+                    return ts.createKeywordTypeNode(122 /* BooleanKeyword */);
+                }
+                if (type.flags & 256 /* EnumLiteral */ && !(type.flags & 65536 /* Union */)) {
+                    var parentSymbol = getParentOfSymbol(type.symbol);
+                    var parentName = symbolToName(parentSymbol, context, 793064 /* Type */, /*expectsIdentifier*/ false);
+                    var enumLiteralName = getDeclaredTypeOfSymbol(parentSymbol) === type ? parentName : ts.createQualifiedName(parentName, getNameOfSymbol(type.symbol, context));
+                    return ts.createTypeReferenceNode(enumLiteralName, /*typeArguments*/ undefined);
+                }
+                if (type.flags & 272 /* EnumLike */) {
+                    var name_11 = symbolToName(type.symbol, context, 793064 /* Type */, /*expectsIdentifier*/ false);
+                    return ts.createTypeReferenceNode(name_11, /*typeArguments*/ undefined);
+                }
+                if (type.flags & (32 /* StringLiteral */)) {
+                    return ts.createLiteralTypeNode(ts.setEmitFlags(ts.createLiteral(type.value), 16777216 /* NoAsciiEscaping */));
+                }
+                if (type.flags & (64 /* NumberLiteral */)) {
+                    return ts.createLiteralTypeNode((ts.createLiteral(type.value)));
+                }
+                if (type.flags & 128 /* BooleanLiteral */) {
+                    return type.intrinsicName === "true" ? ts.createTrue() : ts.createFalse();
+                }
+                if (type.flags & 1024 /* Void */) {
+                    return ts.createKeywordTypeNode(105 /* VoidKeyword */);
+                }
+                if (type.flags & 2048 /* Undefined */) {
+                    return ts.createKeywordTypeNode(139 /* UndefinedKeyword */);
+                }
+                if (type.flags & 4096 /* Null */) {
+                    return ts.createKeywordTypeNode(95 /* NullKeyword */);
+                }
+                if (type.flags & 8192 /* Never */) {
+                    return ts.createKeywordTypeNode(130 /* NeverKeyword */);
+                }
+                if (type.flags & 512 /* ESSymbol */) {
+                    return ts.createKeywordTypeNode(137 /* SymbolKeyword */);
+                }
+                if (type.flags & 16777216 /* NonPrimitive */) {
+                    return ts.createKeywordTypeNode(134 /* ObjectKeyword */);
+                }
+                if (type.flags & 16384 /* TypeParameter */ && type.isThisType) {
+                    if (context.flags & ts.NodeBuilderFlags.InObjectTypeLiteral) {
+                        if (!context.encounteredError && !(context.flags & ts.NodeBuilderFlags.AllowThisInObjectLiteral)) {
+                            context.encounteredError = true;
+                        }
                     }
-                    ts.Debug.assert(ts.isWellKnownSymbolSyntactically(nameExpression));
-                    return ts.getPropertyNameForKnownSymbolName(nameExpression.name.text);
+                    return ts.createThis();
                 }
-                return node.name.text;
-            }
-            switch (node.kind) {
-                case 148 /* Constructor */:
-                    return "__constructor";
-                case 156 /* FunctionType */:
-                case 151 /* CallSignature */:
-                    return "__call";
-                case 157 /* ConstructorType */:
-                case 152 /* ConstructSignature */:
-                    return "__new";
-                case 153 /* IndexSignature */:
-                    return "__index";
-                case 236 /* ExportDeclaration */:
-                    return "__export";
-                case 235 /* ExportAssignment */:
-                    return node.isExportEquals ? "export=" : "default";
-                case 187 /* BinaryExpression */:
-                    switch (ts.getSpecialPropertyAssignmentKind(node)) {
-                        case 2 /* ModuleExports */:
-                            // module.exports = ...
-                            return "export=";
-                        case 1 /* ExportsProperty */:
-                        case 4 /* ThisProperty */:
-                            // exports.x = ... or this.y = ...
-                            return node.left.name.text;
-                        case 3 /* PrototypeProperty */:
-                            // className.prototype.methodName = ...
-                            return node.left.expression.name.text;
+                var objectFlags = getObjectFlags(type);
+                if (objectFlags & 4 /* Reference */) {
+                    ts.Debug.assert(!!(type.flags & 32768 /* Object */));
+                    return typeReferenceToTypeNode(type);
+                }
+                if (type.flags & 16384 /* TypeParameter */ || objectFlags & 3 /* ClassOrInterface */) {
+                    var name_12 = symbolToName(type.symbol, context, 793064 /* Type */, /*expectsIdentifier*/ false);
+                    // Ignore constraint/default when creating a usage (as opposed to declaration) of a type parameter.
+                    return ts.createTypeReferenceNode(name_12, /*typeArguments*/ undefined);
+                }
+                if (!inTypeAlias && type.aliasSymbol &&
+                    isSymbolAccessible(type.aliasSymbol, context.enclosingDeclaration, 793064 /* Type */, /*shouldComputeAliasesToMakeVisible*/ false).accessibility === 0 /* Accessible */) {
+                    var name_13 = symbolToTypeReferenceName(type.aliasSymbol);
+                    var typeArgumentNodes = mapToTypeNodes(type.aliasTypeArguments, context);
+                    return ts.createTypeReferenceNode(name_13, typeArgumentNodes);
+                }
+                if (type.flags & (65536 /* Union */ | 131072 /* Intersection */)) {
+                    var types = type.flags & 65536 /* Union */ ? formatUnionTypes(type.types) : type.types;
+                    var typeNodes = mapToTypeNodes(types, context);
+                    if (typeNodes && typeNodes.length > 0) {
+                        var unionOrIntersectionTypeNode = ts.createUnionOrIntersectionTypeNode(type.flags & 65536 /* Union */ ? 166 /* UnionType */ : 167 /* IntersectionType */, typeNodes);
+                        return unionOrIntersectionTypeNode;
                     }
-                    ts.Debug.fail("Unknown binary declaration kind");
-                    break;
-                case 220 /* FunctionDeclaration */:
-                case 221 /* ClassDeclaration */:
-                    return ts.hasModifier(node, 512 /* Default */) ? "default" : undefined;
-                case 269 /* JSDocFunctionType */:
-                    return ts.isJSDocConstructSignature(node) ? "__new" : "__call";
-                case 142 /* Parameter */:
-                    // Parameters with names are handled at the top of this function.  Parameters
-                    // without names can only come from JSDocFunctionTypes.
-                    ts.Debug.assert(node.parent.kind === 269 /* JSDocFunctionType */);
-                    var functionType = node.parent;
-                    var index = ts.indexOf(functionType.parameters, node);
-                    return "arg" + index;
-                case 279 /* JSDocTypedefTag */:
-                    var parentNode = node.parent && node.parent.parent;
-                    var nameFromParentNode = void 0;
-                    if (parentNode && parentNode.kind === 200 /* VariableStatement */) {
-                        if (parentNode.declarationList.declarations.length > 0) {
-                            var nameIdentifier = parentNode.declarationList.declarations[0].name;
-                            if (nameIdentifier.kind === 69 /* Identifier */) {
-                                nameFromParentNode = nameIdentifier.text;
-                            }
+                    else {
+                        if (!context.encounteredError && !(context.flags & ts.NodeBuilderFlags.AllowEmptyUnionOrIntersection)) {
+                            context.encounteredError = true;
                         }
+                        return undefined;
                     }
-                    return nameFromParentNode;
-            }
-        }
-        function getDisplayName(node) {
-            return node.name ? ts.declarationNameToString(node.name) : getDeclarationName(node);
-        }
-        /**
-         * Declares a Symbol for the node and adds it to symbols. Reports errors for conflicting identifier names.
-         * @param symbolTable - The symbol table which node will be added to.
-         * @param parent - node's parent declaration.
-         * @param node - The declaration to be added to the symbol table
-         * @param includes - The SymbolFlags that node has in addition to its declaration type (eg: export, ambient, etc.)
-         * @param excludes - The flags which node cannot be declared alongside in a symbol table. Used to report forbidden declarations.
-         */
-        function declareSymbol(symbolTable, parent, node, includes, excludes) {
-            ts.Debug.assert(!ts.hasDynamicName(node));
-            var isDefaultExport = ts.hasModifier(node, 512 /* Default */);
-            // The exported symbol for an export default function/class node is always named "default"
-            var name = isDefaultExport && parent ? "default" : getDeclarationName(node);
-            var symbol;
-            if (name === undefined) {
-                symbol = createSymbol(0 /* None */, "__missing");
-            }
-            else {
-                // Check and see if the symbol table already has a symbol with this name.  If not,
-                // create a new symbol with this name and add it to the table.  Note that we don't
-                // give the new symbol any flags *yet*.  This ensures that it will not conflict
-                // with the 'excludes' flags we pass in.
-                //
-                // If we do get an existing symbol, see if it conflicts with the new symbol we're
-                // creating.  For example, a 'var' symbol and a 'class' symbol will conflict within
-                // the same symbol table.  If we have a conflict, report the issue on each
-                // declaration we have for this symbol, and then create a new symbol for this
-                // declaration.
-                //
-                // Note that when properties declared in Javascript constructors
-                // (marked by isReplaceableByMethod) conflict with another symbol, the property loses.
-                // Always. This allows the common Javascript pattern of overwriting a prototype method
-                // with an bound instance method of the same type: `this.method = this.method.bind(this)`
-                //
-                // If we created a new symbol, either because we didn't have a symbol with this name
-                // in the symbol table, or we conflicted with an existing symbol, then just add this
-                // node as the sole declaration of the new symbol.
-                //
-                // Otherwise, we'll be merging into a compatible existing symbol (for example when
-                // you have multiple 'vars' with the same name in the same container).  In this case
-                // just add this node into the declarations list of the symbol.
-                symbol = symbolTable[name] || (symbolTable[name] = createSymbol(0 /* None */, name));
-                if (name && (includes & 788448 /* Classifiable */)) {
-                    classifiableNames[name] = name;
                 }
-                if (symbol.flags & excludes) {
-                    if (symbol.isReplaceableByMethod) {
-                        // Javascript constructor-declared symbols can be discarded in favor of
-                        // prototype symbols like methods.
-                        symbol = symbolTable[name] = createSymbol(0 /* None */, name);
+                if (objectFlags & (16 /* Anonymous */ | 32 /* Mapped */)) {
+                    ts.Debug.assert(!!(type.flags & 32768 /* Object */));
+                    // The type is an object literal type.
+                    return createAnonymousTypeNode(type);
+                }
+                if (type.flags & 262144 /* Index */) {
+                    var indexedType = type.type;
+                    var indexTypeNode = typeToTypeNodeHelper(indexedType, context);
+                    return ts.createTypeOperatorNode(indexTypeNode);
+                }
+                if (type.flags & 524288 /* IndexedAccess */) {
+                    var objectTypeNode = typeToTypeNodeHelper(type.objectType, context);
+                    var indexTypeNode = typeToTypeNodeHelper(type.indexType, context);
+                    return ts.createIndexedAccessTypeNode(objectTypeNode, indexTypeNode);
+                }
+                ts.Debug.fail("Should be unreachable.");
+                function createMappedTypeNodeFromType(type) {
+                    ts.Debug.assert(!!(type.flags & 32768 /* Object */));
+                    var readonlyToken = type.declaration && type.declaration.readonlyToken ? ts.createToken(131 /* ReadonlyKeyword */) : undefined;
+                    var questionToken = type.declaration && type.declaration.questionToken ? ts.createToken(55 /* QuestionToken */) : undefined;
+                    var typeParameterNode = typeParameterToDeclaration(getTypeParameterFromMappedType(type), context);
+                    var templateTypeNode = typeToTypeNodeHelper(getTemplateTypeFromMappedType(type), context);
+                    var mappedTypeNode = ts.createMappedTypeNode(readonlyToken, typeParameterNode, questionToken, templateTypeNode);
+                    return ts.setEmitFlags(mappedTypeNode, 1 /* SingleLine */);
+                }
+                function createAnonymousTypeNode(type) {
+                    var symbol = type.symbol;
+                    if (symbol) {
+                        // Always use 'typeof T' for type of class, enum, and module objects
+                        if (symbol.flags & 32 /* Class */ && !getBaseTypeVariableOfClass(symbol) ||
+                            symbol.flags & (384 /* Enum */ | 512 /* ValueModule */) ||
+                            shouldWriteTypeOfFunctionSymbol()) {
+                            return createTypeQueryNodeFromSymbol(symbol, 107455 /* Value */);
+                        }
+                        else if (ts.contains(context.symbolStack, symbol)) {
+                            // If type is an anonymous type literal in a type alias declaration, use type alias name
+                            var typeAlias = getTypeAliasForTypeLiteral(type);
+                            if (typeAlias) {
+                                // The specified symbol flags need to be reinterpreted as type flags
+                                var entityName = symbolToName(typeAlias, context, 793064 /* Type */, /*expectsIdentifier*/ false);
+                                return ts.createTypeReferenceNode(entityName, /*typeArguments*/ undefined);
+                            }
+                            else {
+                                return ts.createKeywordTypeNode(119 /* AnyKeyword */);
+                            }
+                        }
+                        else {
+                            // Since instantiations of the same anonymous type have the same symbol, tracking symbols instead
+                            // of types allows us to catch circular references to instantiations of the same anonymous type
+                            if (!context.symbolStack) {
+                                context.symbolStack = [];
+                            }
+                            context.symbolStack.push(symbol);
+                            var result = createTypeNodeFromObjectType(type);
+                            context.symbolStack.pop();
+                            return result;
+                        }
                     }
                     else {
-                        if (node.name) {
-                            node.name.parent = node;
+                        // Anonymous types without a symbol are never circular.
+                        return createTypeNodeFromObjectType(type);
+                    }
+                    function shouldWriteTypeOfFunctionSymbol() {
+                        var isStaticMethodSymbol = !!(symbol.flags & 8192 /* Method */ &&
+                            ts.forEach(symbol.declarations, function (declaration) { return ts.getModifierFlags(declaration) & 32 /* Static */; }));
+                        var isNonLocalFunctionSymbol = !!(symbol.flags & 16 /* Function */) &&
+                            (symbol.parent ||
+                                ts.forEach(symbol.declarations, function (declaration) {
+                                    return declaration.parent.kind === 265 /* SourceFile */ || declaration.parent.kind === 234 /* ModuleBlock */;
+                                }));
+                        if (isStaticMethodSymbol || isNonLocalFunctionSymbol) {
+                            // typeof is allowed only for static/non local functions
+                            return ts.contains(context.symbolStack, symbol); // it is type of the symbol uses itself recursively
                         }
-                        // Report errors every position with duplicate declaration
-                        // Report errors on previous encountered declarations
-                        var message_1 = symbol.flags & 2 /* BlockScopedVariable */
-                            ? ts.Diagnostics.Cannot_redeclare_block_scoped_variable_0
-                            : ts.Diagnostics.Duplicate_identifier_0;
-                        ts.forEach(symbol.declarations, function (declaration) {
-                            if (ts.hasModifier(declaration, 512 /* Default */)) {
-                                message_1 = ts.Diagnostics.A_module_cannot_have_multiple_default_exports;
-                            }
-                        });
-                        ts.forEach(symbol.declarations, function (declaration) {
-                            file.bindDiagnostics.push(ts.createDiagnosticForNode(declaration.name || declaration, message_1, getDisplayName(declaration)));
-                        });
-                        file.bindDiagnostics.push(ts.createDiagnosticForNode(node.name || node, message_1, getDisplayName(node)));
-                        symbol = createSymbol(0 /* None */, name);
                     }
                 }
-            }
-            addDeclarationToSymbol(symbol, node, includes);
-            symbol.parent = parent;
-            return symbol;
-        }
-        function declareModuleMember(node, symbolFlags, symbolExcludes) {
-            var hasExportModifier = ts.getCombinedModifierFlags(node) & 1 /* Export */;
-            if (symbolFlags & 8388608 /* Alias */) {
-                if (node.kind === 238 /* ExportSpecifier */ || (node.kind === 229 /* ImportEqualsDeclaration */ && hasExportModifier)) {
-                    return declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
+                function createTypeNodeFromObjectType(type) {
+                    if (type.objectFlags & 32 /* Mapped */) {
+                        if (getConstraintTypeFromMappedType(type).flags & (16384 /* TypeParameter */ | 262144 /* Index */)) {
+                            return createMappedTypeNodeFromType(type);
+                        }
+                    }
+                    var resolved = resolveStructuredTypeMembers(type);
+                    if (!resolved.properties.length && !resolved.stringIndexInfo && !resolved.numberIndexInfo) {
+                        if (!resolved.callSignatures.length && !resolved.constructSignatures.length) {
+                            return ts.setEmitFlags(ts.createTypeLiteralNode(/*members*/ undefined), 1 /* SingleLine */);
+                        }
+                        if (resolved.callSignatures.length === 1 && !resolved.constructSignatures.length) {
+                            var signature = resolved.callSignatures[0];
+                            var signatureNode = signatureToSignatureDeclarationHelper(signature, 160 /* FunctionType */, context);
+                            return signatureNode;
+                        }
+                        if (resolved.constructSignatures.length === 1 && !resolved.callSignatures.length) {
+                            var signature = resolved.constructSignatures[0];
+                            var signatureNode = signatureToSignatureDeclarationHelper(signature, 161 /* ConstructorType */, context);
+                            return signatureNode;
+                        }
+                    }
+                    var savedFlags = context.flags;
+                    context.flags |= ts.NodeBuilderFlags.InObjectTypeLiteral;
+                    var members = createTypeNodesFromResolvedType(resolved);
+                    context.flags = savedFlags;
+                    var typeLiteralNode = ts.createTypeLiteralNode(members);
+                    return ts.setEmitFlags(typeLiteralNode, 1 /* SingleLine */);
                 }
-                else {
-                    return declareSymbol(container.locals, undefined, node, symbolFlags, symbolExcludes);
+                function createTypeQueryNodeFromSymbol(symbol, symbolFlags) {
+                    var entityName = symbolToName(symbol, context, symbolFlags, /*expectsIdentifier*/ false);
+                    return ts.createTypeQueryNode(entityName);
                 }
-            }
-            else {
-                // Exported module members are given 2 symbols: A local symbol that is classified with an ExportValue,
-                // ExportType, or ExportContainer flag, and an associated export symbol with all the correct flags set
-                // on it. There are 2 main reasons:
-                //
-                //   1. We treat locals and exports of the same name as mutually exclusive within a container.
-                //      That means the binder will issue a Duplicate Identifier error if you mix locals and exports
-                //      with the same name in the same container.
-                //      TODO: Make this a more specific error and decouple it from the exclusion logic.
-                //   2. When we checkIdentifier in the checker, we set its resolved symbol to the local symbol,
-                //      but return the export symbol (by calling getExportSymbolOfValueSymbolIfExported). That way
-                //      when the emitter comes back to it, it knows not to qualify the name if it was found in a containing scope.
-                // NOTE: Nested ambient modules always should go to to 'locals' table to prevent their automatic merge
-                //       during global merging in the checker. Why? The only case when ambient module is permitted inside another module is module augmentation
-                //       and this case is specially handled. Module augmentations should only be merged with original module definition
-                //       and should never be merged directly with other augmentation, and the latter case would be possible if automatic merge is allowed.
-                if (!ts.isAmbientModule(node) && (hasExportModifier || container.flags & 32 /* ExportContext */)) {
-                    var exportKind = (symbolFlags & 107455 /* Value */ ? 1048576 /* ExportValue */ : 0) |
-                        (symbolFlags & 793064 /* Type */ ? 2097152 /* ExportType */ : 0) |
-                        (symbolFlags & 1920 /* Namespace */ ? 4194304 /* ExportNamespace */ : 0);
-                    var local = declareSymbol(container.locals, undefined, node, exportKind, symbolExcludes);
-                    local.exportSymbol = declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
-                    node.localSymbol = local;
-                    return local;
+                function symbolToTypeReferenceName(symbol) {
+                    // Unnamed function expressions and arrow functions have reserved names that we don't want to display
+                    var entityName = symbol.flags & 32 /* Class */ || !isReservedMemberName(symbol.name) ? symbolToName(symbol, context, 793064 /* Type */, /*expectsIdentifier*/ false) : ts.createIdentifier("");
+                    return entityName;
                 }
-                else {
-                    return declareSymbol(container.locals, undefined, node, symbolFlags, symbolExcludes);
+                function typeReferenceToTypeNode(type) {
+                    var typeArguments = type.typeArguments || emptyArray;
+                    if (type.target === globalArrayType) {
+                        if (context.flags & ts.NodeBuilderFlags.WriteArrayAsGenericType) {
+                            var typeArgumentNode = typeToTypeNodeHelper(typeArguments[0], context);
+                            return ts.createTypeReferenceNode("Array", [typeArgumentNode]);
+                        }
+                        var elementType = typeToTypeNodeHelper(typeArguments[0], context);
+                        return ts.createArrayTypeNode(elementType);
+                    }
+                    else if (type.target.objectFlags & 8 /* Tuple */) {
+                        if (typeArguments.length > 0) {
+                            var tupleConstituentNodes = mapToTypeNodes(typeArguments.slice(0, getTypeReferenceArity(type)), context);
+                            if (tupleConstituentNodes && tupleConstituentNodes.length > 0) {
+                                return ts.createTupleTypeNode(tupleConstituentNodes);
+                            }
+                        }
+                        if (!context.encounteredError && !(context.flags & ts.NodeBuilderFlags.AllowEmptyTuple)) {
+                            context.encounteredError = true;
+                        }
+                        return undefined;
+                    }
+                    else {
+                        var outerTypeParameters = type.target.outerTypeParameters;
+                        var i = 0;
+                        var qualifiedName = void 0;
+                        if (outerTypeParameters) {
+                            var length_1 = outerTypeParameters.length;
+                            while (i < length_1) {
+                                // Find group of type arguments for type parameters with the same declaring container.
+                                var start = i;
+                                var parent_6 = getParentSymbolOfTypeParameter(outerTypeParameters[i]);
+                                do {
+                                    i++;
+                                } while (i < length_1 && getParentSymbolOfTypeParameter(outerTypeParameters[i]) === parent_6);
+                                // When type parameters are their own type arguments for the whole group (i.e. we have
+                                // the default outer type arguments), we don't show the group.
+                                if (!ts.rangeEquals(outerTypeParameters, typeArguments, start, i)) {
+                                    var typeArgumentSlice = mapToTypeNodes(typeArguments.slice(start, i), context);
+                                    var typeArgumentNodes_1 = typeArgumentSlice && ts.createNodeArray(typeArgumentSlice);
+                                    var namePart = symbolToTypeReferenceName(parent_6);
+                                    (namePart.kind === 71 /* Identifier */ ? namePart : namePart.right).typeArguments = typeArgumentNodes_1;
+                                    if (qualifiedName) {
+                                        ts.Debug.assert(!qualifiedName.right);
+                                        qualifiedName = addToQualifiedNameMissingRightIdentifier(qualifiedName, namePart);
+                                        qualifiedName = ts.createQualifiedName(qualifiedName, /*right*/ undefined);
+                                    }
+                                    else {
+                                        qualifiedName = ts.createQualifiedName(namePart, /*right*/ undefined);
+                                    }
+                                }
+                            }
+                        }
+                        var entityName = undefined;
+                        var nameIdentifier = symbolToTypeReferenceName(type.symbol);
+                        if (qualifiedName) {
+                            ts.Debug.assert(!qualifiedName.right);
+                            qualifiedName = addToQualifiedNameMissingRightIdentifier(qualifiedName, nameIdentifier);
+                            entityName = qualifiedName;
+                        }
+                        else {
+                            entityName = nameIdentifier;
+                        }
+                        var typeArgumentNodes = void 0;
+                        if (typeArguments.length > 0) {
+                            var typeParameterCount = (type.target.typeParameters || emptyArray).length;
+                            typeArgumentNodes = mapToTypeNodes(typeArguments.slice(i, typeParameterCount), context);
+                        }
+                        if (typeArgumentNodes) {
+                            var lastIdentifier = entityName.kind === 71 /* Identifier */ ? entityName : entityName.right;
+                            lastIdentifier.typeArguments = undefined;
+                        }
+                        return ts.createTypeReferenceNode(entityName, typeArgumentNodes);
+                    }
                 }
-            }
-        }
-        // All container nodes are kept on a linked list in declaration order. This list is used by
-        // the getLocalNameOfContainer function in the type checker to validate that the local name
-        // used for a container is unique.
-        function bindContainer(node, containerFlags) {
-            // Before we recurse into a node's children, we first save the existing parent, container
-            // and block-container.  Then after we pop out of processing the children, we restore
-            // these saved values.
-            var saveContainer = container;
-            var savedBlockScopeContainer = blockScopeContainer;
-            // Depending on what kind of node this is, we may have to adjust the current container
-            // and block-container.   If the current node is a container, then it is automatically
-            // considered the current block-container as well.  Also, for containers that we know
-            // may contain locals, we proactively initialize the .locals field. We do this because
-            // it's highly likely that the .locals will be needed to place some child in (for example,
-            // a parameter, or variable declaration).
-            //
-            // However, we do not proactively create the .locals for block-containers because it's
-            // totally normal and common for block-containers to never actually have a block-scoped
-            // variable in them.  We don't want to end up allocating an object for every 'block' we
-            // run into when most of them won't be necessary.
-            //
-            // Finally, if this is a block-container, then we clear out any existing .locals object
-            // it may contain within it.  This happens in incremental scenarios.  Because we can be
-            // reusing a node from a previous compilation, that node may have had 'locals' created
-            // for it.  We must clear this so we don't accidentally move any stale data forward from
-            // a previous compilation.
-            if (containerFlags & 1 /* IsContainer */) {
-                container = blockScopeContainer = node;
-                if (containerFlags & 32 /* HasLocals */) {
-                    container.locals = ts.createMap();
+                function addToQualifiedNameMissingRightIdentifier(left, right) {
+                    ts.Debug.assert(left.right === undefined);
+                    if (right.kind === 71 /* Identifier */) {
+                        left.right = right;
+                        return left;
+                    }
+                    var rightPart = right;
+                    while (rightPart.left.kind !== 71 /* Identifier */) {
+                        rightPart = rightPart.left;
+                    }
+                    left.right = rightPart.left;
+                    rightPart.left = left;
+                    return right;
+                }
+                function createTypeNodesFromResolvedType(resolvedType) {
+                    var typeElements = [];
+                    for (var _i = 0, _a = resolvedType.callSignatures; _i < _a.length; _i++) {
+                        var signature = _a[_i];
+                        typeElements.push(signatureToSignatureDeclarationHelper(signature, 155 /* CallSignature */, context));
+                    }
+                    for (var _b = 0, _c = resolvedType.constructSignatures; _b < _c.length; _b++) {
+                        var signature = _c[_b];
+                        typeElements.push(signatureToSignatureDeclarationHelper(signature, 156 /* ConstructSignature */, context));
+                    }
+                    if (resolvedType.stringIndexInfo) {
+                        typeElements.push(indexInfoToIndexSignatureDeclarationHelper(resolvedType.stringIndexInfo, 0 /* String */, context));
+                    }
+                    if (resolvedType.numberIndexInfo) {
+                        typeElements.push(indexInfoToIndexSignatureDeclarationHelper(resolvedType.numberIndexInfo, 1 /* Number */, context));
+                    }
+                    var properties = resolvedType.properties;
+                    if (!properties) {
+                        return typeElements;
+                    }
+                    for (var _d = 0, properties_1 = properties; _d < properties_1.length; _d++) {
+                        var propertySymbol = properties_1[_d];
+                        var propertyType = getTypeOfSymbol(propertySymbol);
+                        var saveEnclosingDeclaration = context.enclosingDeclaration;
+                        context.enclosingDeclaration = undefined;
+                        var propertyName = symbolToName(propertySymbol, context, 107455 /* Value */, /*expectsIdentifier*/ true);
+                        context.enclosingDeclaration = saveEnclosingDeclaration;
+                        var optionalToken = propertySymbol.flags & 67108864 /* Optional */ ? ts.createToken(55 /* QuestionToken */) : undefined;
+                        if (propertySymbol.flags & (16 /* Function */ | 8192 /* Method */) && !getPropertiesOfObjectType(propertyType).length) {
+                            var signatures = getSignaturesOfType(propertyType, 0 /* Call */);
+                            for (var _e = 0, signatures_1 = signatures; _e < signatures_1.length; _e++) {
+                                var signature = signatures_1[_e];
+                                var methodDeclaration = signatureToSignatureDeclarationHelper(signature, 150 /* MethodSignature */, context);
+                                methodDeclaration.name = propertyName;
+                                methodDeclaration.questionToken = optionalToken;
+                                typeElements.push(methodDeclaration);
+                            }
+                        }
+                        else {
+                            var propertyTypeNode = propertyType ? typeToTypeNodeHelper(propertyType, context) : ts.createKeywordTypeNode(119 /* AnyKeyword */);
+                            var modifiers = isReadonlySymbol(propertySymbol) ? [ts.createToken(131 /* ReadonlyKeyword */)] : undefined;
+                            var propertySignature = ts.createPropertySignature(modifiers, propertyName, optionalToken, propertyTypeNode, 
+                            /*initializer*/ undefined);
+                            typeElements.push(propertySignature);
+                        }
+                    }
+                    return typeElements.length ? typeElements : undefined;
                 }
-                addToContainerChain(container);
             }
-            else if (containerFlags & 2 /* IsBlockScopedContainer */) {
-                blockScopeContainer = node;
-                blockScopeContainer.locals = undefined;
+            function mapToTypeNodes(types, context) {
+                if (ts.some(types)) {
+                    var result = [];
+                    for (var i = 0; i < types.length; ++i) {
+                        var type = types[i];
+                        var typeNode = typeToTypeNodeHelper(type, context);
+                        if (typeNode) {
+                            result.push(typeNode);
+                        }
+                    }
+                    return result;
+                }
             }
-            if (containerFlags & 4 /* IsControlFlowContainer */) {
-                var saveCurrentFlow = currentFlow;
-                var saveBreakTarget = currentBreakTarget;
-                var saveContinueTarget = currentContinueTarget;
-                var saveReturnTarget = currentReturnTarget;
-                var saveActiveLabels = activeLabels;
-                var saveHasExplicitReturn = hasExplicitReturn;
-                var isIIFE = containerFlags & 16 /* IsFunctionExpression */ && !!ts.getImmediatelyInvokedFunctionExpression(node);
-                // An IIFE is considered part of the containing control flow. Return statements behave
-                // similarly to break statements that exit to a label just past the statement body.
-                if (isIIFE) {
-                    currentReturnTarget = createBranchLabel();
+            function indexInfoToIndexSignatureDeclarationHelper(indexInfo, kind, context) {
+                var name = ts.getNameFromIndexInfo(indexInfo) || "x";
+                var indexerTypeNode = ts.createKeywordTypeNode(kind === 0 /* String */ ? 136 /* StringKeyword */ : 133 /* NumberKeyword */);
+                var indexingParameter = ts.createParameter(
+                /*decorators*/ undefined, 
+                /*modifiers*/ undefined, 
+                /*dotDotDotToken*/ undefined, name, 
+                /*questionToken*/ undefined, indexerTypeNode, 
+                /*initializer*/ undefined);
+                var typeNode = typeToTypeNodeHelper(indexInfo.type, context);
+                return ts.createIndexSignature(
+                /*decorators*/ undefined, indexInfo.isReadonly ? [ts.createToken(131 /* ReadonlyKeyword */)] : undefined, [indexingParameter], typeNode);
+            }
+            function signatureToSignatureDeclarationHelper(signature, kind, context) {
+                var typeParameters = signature.typeParameters && signature.typeParameters.map(function (parameter) { return typeParameterToDeclaration(parameter, context); });
+                var parameters = signature.parameters.map(function (parameter) { return symbolToParameterDeclaration(parameter, context); });
+                if (signature.thisParameter) {
+                    var thisParameter = symbolToParameterDeclaration(signature.thisParameter, context);
+                    parameters.unshift(thisParameter);
+                }
+                var returnTypeNode;
+                if (signature.typePredicate) {
+                    var typePredicate = signature.typePredicate;
+                    var parameterName = typePredicate.kind === 1 /* Identifier */ ?
+                        ts.setEmitFlags(ts.createIdentifier(typePredicate.parameterName), 16777216 /* NoAsciiEscaping */) :
+                        ts.createThisTypeNode();
+                    var typeNode = typeToTypeNodeHelper(typePredicate.type, context);
+                    returnTypeNode = ts.createTypePredicateNode(parameterName, typeNode);
                 }
                 else {
-                    currentFlow = { flags: 2 /* Start */ };
-                    if (containerFlags & 16 /* IsFunctionExpression */) {
-                        currentFlow.container = node;
-                    }
-                    currentReturnTarget = undefined;
+                    var returnType = getReturnTypeOfSignature(signature);
+                    returnTypeNode = returnType && typeToTypeNodeHelper(returnType, context);
                 }
-                currentBreakTarget = undefined;
-                currentContinueTarget = undefined;
-                activeLabels = undefined;
-                hasExplicitReturn = false;
-                bindChildren(node);
-                // Reset all reachability check related flags on node (for incremental scenarios)
-                // Reset all emit helper flags on node (for incremental scenarios)
-                node.flags &= ~32128 /* ReachabilityAndEmitFlags */;
-                if (!(currentFlow.flags & 1 /* Unreachable */) && containerFlags & 8 /* IsFunctionLike */ && ts.nodeIsPresent(node.body)) {
-                    node.flags |= 128 /* HasImplicitReturn */;
-                    if (hasExplicitReturn)
-                        node.flags |= 256 /* HasExplicitReturn */;
+                if (context.flags & ts.NodeBuilderFlags.SuppressAnyReturnType) {
+                    if (returnTypeNode && returnTypeNode.kind === 119 /* AnyKeyword */) {
+                        returnTypeNode = undefined;
+                    }
                 }
-                if (node.kind === 256 /* SourceFile */) {
-                    node.flags |= emitFlags;
+                else if (!returnTypeNode) {
+                    returnTypeNode = ts.createKeywordTypeNode(119 /* AnyKeyword */);
                 }
-                if (isIIFE) {
-                    addAntecedent(currentReturnTarget, currentFlow);
-                    currentFlow = finishFlowLabel(currentReturnTarget);
+                return ts.createSignatureDeclaration(kind, typeParameters, parameters, returnTypeNode);
+            }
+            function typeParameterToDeclaration(type, context) {
+                var name = symbolToName(type.symbol, context, 793064 /* Type */, /*expectsIdentifier*/ true);
+                var constraint = getConstraintFromTypeParameter(type);
+                var constraintNode = constraint && typeToTypeNodeHelper(constraint, context);
+                var defaultParameter = getDefaultFromTypeParameter(type);
+                var defaultParameterNode = defaultParameter && typeToTypeNodeHelper(defaultParameter, context);
+                return ts.createTypeParameterDeclaration(name, constraintNode, defaultParameterNode);
+            }
+            function symbolToParameterDeclaration(parameterSymbol, context) {
+                var parameterDeclaration = ts.getDeclarationOfKind(parameterSymbol, 146 /* Parameter */);
+                if (isTransientSymbol(parameterSymbol) && parameterSymbol.isRestParameter) {
+                    // special-case synthetic rest parameters in JS files
+                    return ts.createParameter(
+                    /*decorators*/ undefined, 
+                    /*modifiers*/ undefined, parameterSymbol.isRestParameter ? ts.createToken(24 /* DotDotDotToken */) : undefined, "args", 
+                    /*questionToken*/ undefined, typeToTypeNodeHelper(anyArrayType, context), 
+                    /*initializer*/ undefined);
+                }
+                var modifiers = parameterDeclaration.modifiers && parameterDeclaration.modifiers.map(ts.getSynthesizedClone);
+                var dotDotDotToken = ts.isRestParameter(parameterDeclaration) ? ts.createToken(24 /* DotDotDotToken */) : undefined;
+                var name = parameterDeclaration.name ?
+                    parameterDeclaration.name.kind === 71 /* Identifier */ ?
+                        ts.setEmitFlags(ts.getSynthesizedClone(parameterDeclaration.name), 16777216 /* NoAsciiEscaping */) :
+                        cloneBindingName(parameterDeclaration.name) :
+                    parameterSymbol.name;
+                var questionToken = isOptionalParameter(parameterDeclaration) ? ts.createToken(55 /* QuestionToken */) : undefined;
+                var parameterType = getTypeOfSymbol(parameterSymbol);
+                if (isRequiredInitializedParameter(parameterDeclaration)) {
+                    parameterType = getNullableType(parameterType, 2048 /* Undefined */);
+                }
+                var parameterTypeNode = typeToTypeNodeHelper(parameterType, context);
+                var parameterNode = ts.createParameter(
+                /*decorators*/ undefined, modifiers, dotDotDotToken, name, questionToken, parameterTypeNode, 
+                /*initializer*/ undefined);
+                return parameterNode;
+                function cloneBindingName(node) {
+                    return elideInitializerAndSetEmitFlags(node);
+                    function elideInitializerAndSetEmitFlags(node) {
+                        var visited = ts.visitEachChild(node, elideInitializerAndSetEmitFlags, ts.nullTransformationContext, /*nodesVisitor*/ undefined, elideInitializerAndSetEmitFlags);
+                        var clone = ts.nodeIsSynthesized(visited) ? visited : ts.getSynthesizedClone(visited);
+                        if (clone.kind === 176 /* BindingElement */) {
+                            clone.initializer = undefined;
+                        }
+                        return ts.setEmitFlags(clone, 1 /* SingleLine */ | 16777216 /* NoAsciiEscaping */);
+                    }
+                }
+            }
+            function symbolToName(symbol, context, meaning, expectsIdentifier) {
+                // Try to get qualified name if the symbol is not a type parameter and there is an enclosing declaration.
+                var chain;
+                var isTypeParameter = symbol.flags & 262144 /* TypeParameter */;
+                if (!isTypeParameter && (context.enclosingDeclaration || context.flags & ts.NodeBuilderFlags.UseFullyQualifiedType)) {
+                    chain = getSymbolChain(symbol, meaning, /*endOfChain*/ true);
+                    ts.Debug.assert(chain && chain.length > 0);
                 }
                 else {
-                    currentFlow = saveCurrentFlow;
+                    chain = [symbol];
+                }
+                if (expectsIdentifier && chain.length !== 1
+                    && !context.encounteredError
+                    && !(context.flags & ts.NodeBuilderFlags.AllowQualifedNameInPlaceOfIdentifier)) {
+                    context.encounteredError = true;
+                }
+                return createEntityNameFromSymbolChain(chain, chain.length - 1);
+                function createEntityNameFromSymbolChain(chain, index) {
+                    ts.Debug.assert(chain && 0 <= index && index < chain.length);
+                    var symbol = chain[index];
+                    var typeParameterNodes;
+                    if (context.flags & ts.NodeBuilderFlags.WriteTypeParametersInQualifiedName && index > 0) {
+                        var parentSymbol = chain[index - 1];
+                        var typeParameters = void 0;
+                        if (ts.getCheckFlags(symbol) & 1 /* Instantiated */) {
+                            typeParameters = getTypeParametersOfClassOrInterface(parentSymbol);
+                        }
+                        else {
+                            var targetSymbol = getTargetSymbol(parentSymbol);
+                            if (targetSymbol.flags & (32 /* Class */ | 64 /* Interface */ | 524288 /* TypeAlias */)) {
+                                typeParameters = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol);
+                            }
+                        }
+                        typeParameterNodes = mapToTypeNodes(typeParameters, context);
+                    }
+                    var symbolName = getNameOfSymbol(symbol, context);
+                    var identifier = ts.setEmitFlags(ts.createIdentifier(symbolName, typeParameterNodes), 16777216 /* NoAsciiEscaping */);
+                    return index > 0 ? ts.createQualifiedName(createEntityNameFromSymbolChain(chain, index - 1), identifier) : identifier;
                 }
-                currentBreakTarget = saveBreakTarget;
-                currentContinueTarget = saveContinueTarget;
-                currentReturnTarget = saveReturnTarget;
-                activeLabels = saveActiveLabels;
-                hasExplicitReturn = saveHasExplicitReturn;
-            }
-            else if (containerFlags & 64 /* IsInterface */) {
-                seenThisKeyword = false;
-                bindChildren(node);
-                node.flags = seenThisKeyword ? node.flags | 64 /* ContainsThis */ : node.flags & ~64 /* ContainsThis */;
-            }
-            else {
-                bindChildren(node);
-            }
-            container = saveContainer;
-            blockScopeContainer = savedBlockScopeContainer;
-        }
-        function bindChildren(node) {
-            if (skipTransformFlagAggregation) {
-                bindChildrenWorker(node);
-            }
-            else if (node.transformFlags & 536870912 /* HasComputedFlags */) {
-                skipTransformFlagAggregation = true;
-                bindChildrenWorker(node);
-                skipTransformFlagAggregation = false;
-            }
-            else {
-                var savedSubtreeTransformFlags = subtreeTransformFlags;
-                subtreeTransformFlags = 0;
-                bindChildrenWorker(node);
-                subtreeTransformFlags = savedSubtreeTransformFlags | computeTransformFlagsForNode(node, subtreeTransformFlags);
-            }
-        }
-        function bindChildrenWorker(node) {
-            // Binding of JsDocComment should be done before the current block scope container changes.
-            // because the scope of JsDocComment should not be affected by whether the current node is a
-            // container or not.
-            if (ts.isInJavaScriptFile(node) && node.jsDocComments) {
-                ts.forEach(node.jsDocComments, bind);
-            }
-            if (checkUnreachable(node)) {
-                ts.forEachChild(node, bind);
-                return;
-            }
-            switch (node.kind) {
-                case 205 /* WhileStatement */:
-                    bindWhileStatement(node);
-                    break;
-                case 204 /* DoStatement */:
-                    bindDoStatement(node);
-                    break;
-                case 206 /* ForStatement */:
-                    bindForStatement(node);
-                    break;
-                case 207 /* ForInStatement */:
-                case 208 /* ForOfStatement */:
-                    bindForInOrForOfStatement(node);
-                    break;
-                case 203 /* IfStatement */:
-                    bindIfStatement(node);
-                    break;
-                case 211 /* ReturnStatement */:
-                case 215 /* ThrowStatement */:
-                    bindReturnOrThrow(node);
-                    break;
-                case 210 /* BreakStatement */:
-                case 209 /* ContinueStatement */:
-                    bindBreakOrContinueStatement(node);
-                    break;
-                case 216 /* TryStatement */:
-                    bindTryStatement(node);
-                    break;
-                case 213 /* SwitchStatement */:
-                    bindSwitchStatement(node);
-                    break;
-                case 227 /* CaseBlock */:
-                    bindCaseBlock(node);
-                    break;
-                case 249 /* CaseClause */:
-                    bindCaseClause(node);
-                    break;
-                case 214 /* LabeledStatement */:
-                    bindLabeledStatement(node);
-                    break;
-                case 185 /* PrefixUnaryExpression */:
-                    bindPrefixUnaryExpressionFlow(node);
-                    break;
-                case 186 /* PostfixUnaryExpression */:
-                    bindPostfixUnaryExpressionFlow(node);
-                    break;
-                case 187 /* BinaryExpression */:
-                    bindBinaryExpressionFlow(node);
-                    break;
-                case 181 /* DeleteExpression */:
-                    bindDeleteExpressionFlow(node);
-                    break;
-                case 188 /* ConditionalExpression */:
-                    bindConditionalExpressionFlow(node);
-                    break;
-                case 218 /* VariableDeclaration */:
-                    bindVariableDeclarationFlow(node);
-                    break;
-                case 174 /* CallExpression */:
-                    bindCallExpressionFlow(node);
-                    break;
-                default:
-                    ts.forEachChild(node, bind);
-                    break;
-            }
-        }
-        function isNarrowingExpression(expr) {
-            switch (expr.kind) {
-                case 69 /* Identifier */:
-                case 97 /* ThisKeyword */:
-                case 172 /* PropertyAccessExpression */:
-                    return isNarrowableReference(expr);
-                case 174 /* CallExpression */:
-                    return hasNarrowableArgument(expr);
-                case 178 /* ParenthesizedExpression */:
-                    return isNarrowingExpression(expr.expression);
-                case 187 /* BinaryExpression */:
-                    return isNarrowingBinaryExpression(expr);
-                case 185 /* PrefixUnaryExpression */:
-                    return expr.operator === 49 /* ExclamationToken */ && isNarrowingExpression(expr.operand);
-            }
-            return false;
-        }
-        function isNarrowableReference(expr) {
-            return expr.kind === 69 /* Identifier */ ||
-                expr.kind === 97 /* ThisKeyword */ ||
-                expr.kind === 172 /* PropertyAccessExpression */ && isNarrowableReference(expr.expression);
-        }
-        function hasNarrowableArgument(expr) {
-            if (expr.arguments) {
-                for (var _i = 0, _a = expr.arguments; _i < _a.length; _i++) {
-                    var argument = _a[_i];
-                    if (isNarrowableReference(argument)) {
-                        return true;
+                /** @param endOfChain Set to false for recursive calls; non-recursive calls should always output something. */
+                function getSymbolChain(symbol, meaning, endOfChain) {
+                    var accessibleSymbolChain = getAccessibleSymbolChain(symbol, context.enclosingDeclaration, meaning, /*useOnlyExternalAliasing*/ false);
+                    var parentSymbol;
+                    if (!accessibleSymbolChain ||
+                        needsQualification(accessibleSymbolChain[0], context.enclosingDeclaration, accessibleSymbolChain.length === 1 ? meaning : getQualifiedLeftMeaning(meaning))) {
+                        // Go up and add our parent.
+                        var parent_7 = getParentOfSymbol(accessibleSymbolChain ? accessibleSymbolChain[0] : symbol);
+                        if (parent_7) {
+                            var parentChain = getSymbolChain(parent_7, getQualifiedLeftMeaning(meaning), /*endOfChain*/ false);
+                            if (parentChain) {
+                                parentSymbol = parent_7;
+                                accessibleSymbolChain = parentChain.concat(accessibleSymbolChain || [symbol]);
+                            }
+                        }
+                    }
+                    if (accessibleSymbolChain) {
+                        return accessibleSymbolChain;
+                    }
+                    if (
+                    // If this is the last part of outputting the symbol, always output. The cases apply only to parent symbols.
+                    endOfChain ||
+                        // If a parent symbol is an external module, don't write it. (We prefer just `x` vs `"foo/bar".x`.)
+                        !(!parentSymbol && ts.forEach(symbol.declarations, hasExternalModuleSymbol)) &&
+                            // If a parent symbol is an anonymous type, don't write it.
+                            !(symbol.flags & (2048 /* TypeLiteral */ | 4096 /* ObjectLiteral */))) {
+                        return [symbol];
                     }
                 }
             }
-            if (expr.expression.kind === 172 /* PropertyAccessExpression */ &&
-                isNarrowableReference(expr.expression.expression)) {
-                return true;
-            }
-            return false;
-        }
-        function isNarrowingTypeofOperands(expr1, expr2) {
-            return expr1.kind === 182 /* TypeOfExpression */ && isNarrowableOperand(expr1.expression) && expr2.kind === 9 /* StringLiteral */;
-        }
-        function isNarrowingBinaryExpression(expr) {
-            switch (expr.operatorToken.kind) {
-                case 56 /* EqualsToken */:
-                    return isNarrowableReference(expr.left);
-                case 30 /* EqualsEqualsToken */:
-                case 31 /* ExclamationEqualsToken */:
-                case 32 /* EqualsEqualsEqualsToken */:
-                case 33 /* ExclamationEqualsEqualsToken */:
-                    return isNarrowableOperand(expr.left) || isNarrowableOperand(expr.right) ||
-                        isNarrowingTypeofOperands(expr.right, expr.left) || isNarrowingTypeofOperands(expr.left, expr.right);
-                case 91 /* InstanceOfKeyword */:
-                    return isNarrowableOperand(expr.left);
-                case 24 /* CommaToken */:
-                    return isNarrowingExpression(expr.right);
-            }
-            return false;
-        }
-        function isNarrowableOperand(expr) {
-            switch (expr.kind) {
-                case 178 /* ParenthesizedExpression */:
-                    return isNarrowableOperand(expr.expression);
-                case 187 /* BinaryExpression */:
-                    switch (expr.operatorToken.kind) {
-                        case 56 /* EqualsToken */:
-                            return isNarrowableOperand(expr.left);
-                        case 24 /* CommaToken */:
-                            return isNarrowableOperand(expr.right);
+            function getNameOfSymbol(symbol, context) {
+                var declaration = ts.firstOrUndefined(symbol.declarations);
+                if (declaration) {
+                    var name_14 = ts.getNameOfDeclaration(declaration);
+                    if (name_14) {
+                        return ts.declarationNameToString(name_14);
                     }
+                    if (declaration.parent && declaration.parent.kind === 226 /* VariableDeclaration */) {
+                        return ts.declarationNameToString(declaration.parent.name);
+                    }
+                    if (!context.encounteredError && !(context.flags & ts.NodeBuilderFlags.AllowAnonymousIdentifier)) {
+                        context.encounteredError = true;
+                    }
+                    switch (declaration.kind) {
+                        case 199 /* ClassExpression */:
+                            return "(Anonymous class)";
+                        case 186 /* FunctionExpression */:
+                        case 187 /* ArrowFunction */:
+                            return "(Anonymous function)";
+                    }
+                }
+                return symbol.name;
             }
-            return isNarrowableReference(expr);
-        }
-        function createBranchLabel() {
-            return {
-                flags: 4 /* BranchLabel */,
-                antecedents: undefined
-            };
-        }
-        function createLoopLabel() {
-            return {
-                flags: 8 /* LoopLabel */,
-                antecedents: undefined
-            };
-        }
-        function setFlowNodeReferenced(flow) {
-            // On first reference we set the Referenced flag, thereafter we set the Shared flag
-            flow.flags |= flow.flags & 256 /* Referenced */ ? 512 /* Shared */ : 256 /* Referenced */;
-        }
-        function addAntecedent(label, antecedent) {
-            if (!(antecedent.flags & 1 /* Unreachable */) && !ts.contains(label.antecedents, antecedent)) {
-                (label.antecedents || (label.antecedents = [])).push(antecedent);
-                setFlowNodeReferenced(antecedent);
-            }
-        }
-        function createFlowCondition(flags, antecedent, expression) {
-            if (antecedent.flags & 1 /* Unreachable */) {
-                return antecedent;
-            }
-            if (!expression) {
-                return flags & 32 /* TrueCondition */ ? antecedent : unreachableFlow;
-            }
-            if (expression.kind === 99 /* TrueKeyword */ && flags & 64 /* FalseCondition */ ||
-                expression.kind === 84 /* FalseKeyword */ && flags & 32 /* TrueCondition */) {
-                return unreachableFlow;
-            }
-            if (!isNarrowingExpression(expression)) {
-                return antecedent;
-            }
-            setFlowNodeReferenced(antecedent);
-            return {
-                flags: flags,
-                expression: expression,
-                antecedent: antecedent
-            };
         }
-        function createFlowSwitchClause(antecedent, switchStatement, clauseStart, clauseEnd) {
-            if (!isNarrowingExpression(switchStatement.expression)) {
-                return antecedent;
-            }
-            setFlowNodeReferenced(antecedent);
-            return {
-                flags: 128 /* SwitchClause */,
-                switchStatement: switchStatement,
-                clauseStart: clauseStart,
-                clauseEnd: clauseEnd,
-                antecedent: antecedent
-            };
+        function typePredicateToString(typePredicate, enclosingDeclaration, flags) {
+            var writer = ts.getSingleLineStringWriter();
+            getSymbolDisplayBuilder().buildTypePredicateDisplay(typePredicate, writer, enclosingDeclaration, flags);
+            var result = writer.string();
+            ts.releaseStringWriter(writer);
+            return result;
         }
-        function createFlowAssignment(antecedent, node) {
-            setFlowNodeReferenced(antecedent);
-            return {
-                flags: 16 /* Assignment */,
-                antecedent: antecedent,
-                node: node
-            };
+        function formatUnionTypes(types) {
+            var result = [];
+            var flags = 0;
+            for (var i = 0; i < types.length; i++) {
+                var t = types[i];
+                flags |= t.flags;
+                if (!(t.flags & 6144 /* Nullable */)) {
+                    if (t.flags & (128 /* BooleanLiteral */ | 256 /* EnumLiteral */)) {
+                        var baseType = t.flags & 128 /* BooleanLiteral */ ? booleanType : getBaseTypeOfEnumLiteralType(t);
+                        if (baseType.flags & 65536 /* Union */) {
+                            var count = baseType.types.length;
+                            if (i + count <= types.length && types[i + count - 1] === baseType.types[count - 1]) {
+                                result.push(baseType);
+                                i += count - 1;
+                                continue;
+                            }
+                        }
+                    }
+                    result.push(t);
+                }
+            }
+            if (flags & 4096 /* Null */)
+                result.push(nullType);
+            if (flags & 2048 /* Undefined */)
+                result.push(undefinedType);
+            return result || types;
         }
-        function finishFlowLabel(flow) {
-            var antecedents = flow.antecedents;
-            if (!antecedents) {
-                return unreachableFlow;
+        function visibilityToString(flags) {
+            if (flags === 8 /* Private */) {
+                return "private";
             }
-            if (antecedents.length === 1) {
-                return antecedents[0];
+            if (flags === 16 /* Protected */) {
+                return "protected";
             }
-            return flow;
+            return "public";
         }
-        function isStatementCondition(node) {
-            var parent = node.parent;
-            switch (parent.kind) {
-                case 203 /* IfStatement */:
-                case 205 /* WhileStatement */:
-                case 204 /* DoStatement */:
-                    return parent.expression === node;
-                case 206 /* ForStatement */:
-                case 188 /* ConditionalExpression */:
-                    return parent.condition === node;
+        function getTypeAliasForTypeLiteral(type) {
+            if (type.symbol && type.symbol.flags & 2048 /* TypeLiteral */) {
+                var node = ts.findAncestor(type.symbol.declarations[0].parent, function (n) { return n.kind !== 168 /* ParenthesizedType */; });
+                if (node.kind === 231 /* TypeAliasDeclaration */) {
+                    return getSymbolOfNode(node);
+                }
             }
-            return false;
+            return undefined;
         }
-        function isLogicalExpression(node) {
-            while (true) {
-                if (node.kind === 178 /* ParenthesizedExpression */) {
-                    node = node.expression;
+        function isTopLevelInExternalModuleAugmentation(node) {
+            return node && node.parent &&
+                node.parent.kind === 234 /* ModuleBlock */ &&
+                ts.isExternalModuleAugmentation(node.parent.parent);
+        }
+        function literalTypeToString(type) {
+            return type.flags & 32 /* StringLiteral */ ? "\"" + ts.escapeString(type.value) + "\"" : "" + type.value;
+        }
+        function getNameOfSymbol(symbol) {
+            if (symbol.declarations && symbol.declarations.length) {
+                var declaration = symbol.declarations[0];
+                var name_15 = ts.getNameOfDeclaration(declaration);
+                if (name_15) {
+                    return ts.declarationNameToString(name_15);
                 }
-                else if (node.kind === 185 /* PrefixUnaryExpression */ && node.operator === 49 /* ExclamationToken */) {
-                    node = node.operand;
+                if (declaration.parent && declaration.parent.kind === 226 /* VariableDeclaration */) {
+                    return ts.declarationNameToString(declaration.parent.name);
                 }
-                else {
-                    return node.kind === 187 /* BinaryExpression */ && (node.operatorToken.kind === 51 /* AmpersandAmpersandToken */ ||
-                        node.operatorToken.kind === 52 /* BarBarToken */);
+                switch (declaration.kind) {
+                    case 199 /* ClassExpression */:
+                        return "(Anonymous class)";
+                    case 186 /* FunctionExpression */:
+                    case 187 /* ArrowFunction */:
+                        return "(Anonymous function)";
                 }
             }
+            return symbol.name;
         }
-        function isTopLevelLogicalExpression(node) {
-            while (node.parent.kind === 178 /* ParenthesizedExpression */ ||
-                node.parent.kind === 185 /* PrefixUnaryExpression */ &&
-                    node.parent.operator === 49 /* ExclamationToken */) {
-                node = node.parent;
-            }
-            return !isStatementCondition(node) && !isLogicalExpression(node.parent);
-        }
-        function bindCondition(node, trueTarget, falseTarget) {
-            var saveTrueTarget = currentTrueTarget;
-            var saveFalseTarget = currentFalseTarget;
-            currentTrueTarget = trueTarget;
-            currentFalseTarget = falseTarget;
-            bind(node);
-            currentTrueTarget = saveTrueTarget;
-            currentFalseTarget = saveFalseTarget;
-            if (!node || !isLogicalExpression(node)) {
-                addAntecedent(trueTarget, createFlowCondition(32 /* TrueCondition */, currentFlow, node));
-                addAntecedent(falseTarget, createFlowCondition(64 /* FalseCondition */, currentFlow, node));
+        function getSymbolDisplayBuilder() {
+            /**
+             * Writes only the name of the symbol out to the writer. Uses the original source text
+             * for the name of the symbol if it is available to match how the user wrote the name.
+             */
+            function appendSymbolNameOnly(symbol, writer) {
+                writer.writeSymbol(getNameOfSymbol(symbol), symbol);
             }
-        }
-        function bindIterativeStatement(node, breakTarget, continueTarget) {
-            var saveBreakTarget = currentBreakTarget;
-            var saveContinueTarget = currentContinueTarget;
-            currentBreakTarget = breakTarget;
-            currentContinueTarget = continueTarget;
-            bind(node);
-            currentBreakTarget = saveBreakTarget;
-            currentContinueTarget = saveContinueTarget;
-        }
-        function bindWhileStatement(node) {
-            var preWhileLabel = createLoopLabel();
-            var preBodyLabel = createBranchLabel();
-            var postWhileLabel = createBranchLabel();
-            addAntecedent(preWhileLabel, currentFlow);
-            currentFlow = preWhileLabel;
-            bindCondition(node.expression, preBodyLabel, postWhileLabel);
-            currentFlow = finishFlowLabel(preBodyLabel);
-            bindIterativeStatement(node.statement, postWhileLabel, preWhileLabel);
-            addAntecedent(preWhileLabel, currentFlow);
-            currentFlow = finishFlowLabel(postWhileLabel);
-        }
-        function bindDoStatement(node) {
-            var preDoLabel = createLoopLabel();
-            var preConditionLabel = createBranchLabel();
-            var postDoLabel = createBranchLabel();
-            addAntecedent(preDoLabel, currentFlow);
-            currentFlow = preDoLabel;
-            bindIterativeStatement(node.statement, postDoLabel, preConditionLabel);
-            addAntecedent(preConditionLabel, currentFlow);
-            currentFlow = finishFlowLabel(preConditionLabel);
-            bindCondition(node.expression, preDoLabel, postDoLabel);
-            currentFlow = finishFlowLabel(postDoLabel);
-        }
-        function bindForStatement(node) {
-            var preLoopLabel = createLoopLabel();
-            var preBodyLabel = createBranchLabel();
-            var postLoopLabel = createBranchLabel();
-            bind(node.initializer);
-            addAntecedent(preLoopLabel, currentFlow);
-            currentFlow = preLoopLabel;
-            bindCondition(node.condition, preBodyLabel, postLoopLabel);
-            currentFlow = finishFlowLabel(preBodyLabel);
-            bindIterativeStatement(node.statement, postLoopLabel, preLoopLabel);
-            bind(node.incrementor);
-            addAntecedent(preLoopLabel, currentFlow);
-            currentFlow = finishFlowLabel(postLoopLabel);
-        }
-        function bindForInOrForOfStatement(node) {
-            var preLoopLabel = createLoopLabel();
-            var postLoopLabel = createBranchLabel();
-            addAntecedent(preLoopLabel, currentFlow);
-            currentFlow = preLoopLabel;
-            bind(node.expression);
-            addAntecedent(postLoopLabel, currentFlow);
-            bind(node.initializer);
-            if (node.initializer.kind !== 219 /* VariableDeclarationList */) {
-                bindAssignmentTargetFlow(node.initializer);
+            /**
+             * Writes a property access or element access with the name of the symbol out to the writer.
+             * Uses the original source text for the name of the symbol if it is available to match how the user wrote the name,
+             * ensuring that any names written with literals use element accesses.
+             */
+            function appendPropertyOrElementAccessForSymbol(symbol, writer) {
+                var symbolName = getNameOfSymbol(symbol);
+                var firstChar = symbolName.charCodeAt(0);
+                var needsElementAccess = !ts.isIdentifierStart(firstChar, languageVersion);
+                if (needsElementAccess) {
+                    writePunctuation(writer, 21 /* OpenBracketToken */);
+                    if (ts.isSingleOrDoubleQuote(firstChar)) {
+                        writer.writeStringLiteral(symbolName);
+                    }
+                    else {
+                        writer.writeSymbol(symbolName, symbol);
+                    }
+                    writePunctuation(writer, 22 /* CloseBracketToken */);
+                }
+                else {
+                    writePunctuation(writer, 23 /* DotToken */);
+                    writer.writeSymbol(symbolName, symbol);
+                }
             }
-            bindIterativeStatement(node.statement, postLoopLabel, preLoopLabel);
-            addAntecedent(preLoopLabel, currentFlow);
-            currentFlow = finishFlowLabel(postLoopLabel);
-        }
-        function bindIfStatement(node) {
-            var thenLabel = createBranchLabel();
-            var elseLabel = createBranchLabel();
-            var postIfLabel = createBranchLabel();
-            bindCondition(node.expression, thenLabel, elseLabel);
-            currentFlow = finishFlowLabel(thenLabel);
-            bind(node.thenStatement);
-            addAntecedent(postIfLabel, currentFlow);
-            currentFlow = finishFlowLabel(elseLabel);
-            bind(node.elseStatement);
-            addAntecedent(postIfLabel, currentFlow);
-            currentFlow = finishFlowLabel(postIfLabel);
-        }
-        function bindReturnOrThrow(node) {
-            bind(node.expression);
-            if (node.kind === 211 /* ReturnStatement */) {
-                hasExplicitReturn = true;
-                if (currentReturnTarget) {
-                    addAntecedent(currentReturnTarget, currentFlow);
+            /**
+             * Enclosing declaration is optional when we don't want to get qualified name in the enclosing declaration scope
+             * Meaning needs to be specified if the enclosing declaration is given
+             */
+            function buildSymbolDisplay(symbol, writer, enclosingDeclaration, meaning, flags, typeFlags) {
+                var parentSymbol;
+                function appendParentTypeArgumentsAndSymbolName(symbol) {
+                    if (parentSymbol) {
+                        // Write type arguments of instantiated class/interface here
+                        if (flags & 1 /* WriteTypeParametersOrArguments */) {
+                            if (ts.getCheckFlags(symbol) & 1 /* Instantiated */) {
+                                var params = getTypeParametersOfClassOrInterface(parentSymbol.flags & 8388608 /* Alias */ ? resolveAlias(parentSymbol) : parentSymbol);
+                                buildDisplayForTypeArgumentsAndDelimiters(params, symbol.mapper, writer, enclosingDeclaration);
+                            }
+                            else {
+                                buildTypeParameterDisplayFromSymbol(parentSymbol, writer, enclosingDeclaration);
+                            }
+                        }
+                        appendPropertyOrElementAccessForSymbol(symbol, writer);
+                    }
+                    else {
+                        appendSymbolNameOnly(symbol, writer);
+                    }
+                    parentSymbol = symbol;
+                }
+                // Let the writer know we just wrote out a symbol.  The declaration emitter writer uses
+                // this to determine if an import it has previously seen (and not written out) needs
+                // to be written to the file once the walk of the tree is complete.
+                //
+                // NOTE(cyrusn): This approach feels somewhat unfortunate.  A simple pass over the tree
+                // up front (for example, during checking) could determine if we need to emit the imports
+                // and we could then access that data during declaration emit.
+                writer.trackSymbol(symbol, enclosingDeclaration, meaning);
+                /** @param endOfChain Set to false for recursive calls; non-recursive calls should always output something. */
+                function walkSymbol(symbol, meaning, endOfChain) {
+                    var accessibleSymbolChain = getAccessibleSymbolChain(symbol, enclosingDeclaration, meaning, !!(flags & 2 /* UseOnlyExternalAliasing */));
+                    if (!accessibleSymbolChain ||
+                        needsQualification(accessibleSymbolChain[0], enclosingDeclaration, accessibleSymbolChain.length === 1 ? meaning : getQualifiedLeftMeaning(meaning))) {
+                        // Go up and add our parent.
+                        var parent_8 = getParentOfSymbol(accessibleSymbolChain ? accessibleSymbolChain[0] : symbol);
+                        if (parent_8) {
+                            walkSymbol(parent_8, getQualifiedLeftMeaning(meaning), /*endOfChain*/ false);
+                        }
+                    }
+                    if (accessibleSymbolChain) {
+                        for (var _i = 0, accessibleSymbolChain_1 = accessibleSymbolChain; _i < accessibleSymbolChain_1.length; _i++) {
+                            var accessibleSymbol = accessibleSymbolChain_1[_i];
+                            appendParentTypeArgumentsAndSymbolName(accessibleSymbol);
+                        }
+                    }
+                    else if (
+                    // If this is the last part of outputting the symbol, always output. The cases apply only to parent symbols.
+                    endOfChain ||
+                        // If a parent symbol is an external module, don't write it. (We prefer just `x` vs `"foo/bar".x`.)
+                        !(!parentSymbol && ts.forEach(symbol.declarations, hasExternalModuleSymbol)) &&
+                            // If a parent symbol is an anonymous type, don't write it.
+                            !(symbol.flags & (2048 /* TypeLiteral */ | 4096 /* ObjectLiteral */))) {
+                        appendParentTypeArgumentsAndSymbolName(symbol);
+                    }
+                }
+                // Get qualified name if the symbol is not a type parameter
+                // and there is an enclosing declaration or we specifically
+                // asked for it
+                var isTypeParameter = symbol.flags & 262144 /* TypeParameter */;
+                var typeFormatFlag = 256 /* UseFullyQualifiedType */ & typeFlags;
+                if (!isTypeParameter && (enclosingDeclaration || typeFormatFlag)) {
+                    walkSymbol(symbol, meaning, /*endOfChain*/ true);
+                }
+                else {
+                    appendParentTypeArgumentsAndSymbolName(symbol);
                 }
             }
-            currentFlow = unreachableFlow;
-        }
-        function findActiveLabel(name) {
-            if (activeLabels) {
-                for (var _i = 0, activeLabels_1 = activeLabels; _i < activeLabels_1.length; _i++) {
-                    var label = activeLabels_1[_i];
-                    if (label.name === name) {
-                        return label;
+            function buildTypeDisplay(type, writer, enclosingDeclaration, globalFlags, symbolStack) {
+                var globalFlagsToPass = globalFlags & (32 /* WriteOwnNameForAnyLike */ | 16384 /* WriteClassExpressionAsTypeLiteral */);
+                var inObjectTypeLiteral = false;
+                return writeType(type, globalFlags);
+                function writeType(type, flags) {
+                    var nextFlags = flags & ~1024 /* InTypeAlias */;
+                    // Write undefined/null type as any
+                    if (type.flags & 16793231 /* Intrinsic */) {
+                        // Special handling for unknown / resolving types, they should show up as any and not unknown or __resolving
+                        writer.writeKeyword(!(globalFlags & 32 /* WriteOwnNameForAnyLike */) && isTypeAny(type)
+                            ? "any"
+                            : type.intrinsicName);
+                    }
+                    else if (type.flags & 16384 /* TypeParameter */ && type.isThisType) {
+                        if (inObjectTypeLiteral) {
+                            writer.reportInaccessibleThisError();
+                        }
+                        writer.writeKeyword("this");
+                    }
+                    else if (getObjectFlags(type) & 4 /* Reference */) {
+                        writeTypeReference(type, nextFlags);
+                    }
+                    else if (type.flags & 256 /* EnumLiteral */ && !(type.flags & 65536 /* Union */)) {
+                        var parent_9 = getParentOfSymbol(type.symbol);
+                        buildSymbolDisplay(parent_9, writer, enclosingDeclaration, 793064 /* Type */, 0 /* None */, nextFlags);
+                        // In a literal enum type with a single member E { A }, E and E.A denote the
+                        // same type. We always display this type simply as E.
+                        if (getDeclaredTypeOfSymbol(parent_9) !== type) {
+                            writePunctuation(writer, 23 /* DotToken */);
+                            appendSymbolNameOnly(type.symbol, writer);
+                        }
+                    }
+                    else if (getObjectFlags(type) & 3 /* ClassOrInterface */ || type.flags & (272 /* EnumLike */ | 16384 /* TypeParameter */)) {
+                        // The specified symbol flags need to be reinterpreted as type flags
+                        buildSymbolDisplay(type.symbol, writer, enclosingDeclaration, 793064 /* Type */, 0 /* None */, nextFlags);
+                    }
+                    else if (!(flags & 1024 /* InTypeAlias */) && type.aliasSymbol &&
+                        isSymbolAccessible(type.aliasSymbol, enclosingDeclaration, 793064 /* Type */, /*shouldComputeAliasesToMakeVisible*/ false).accessibility === 0 /* Accessible */) {
+                        var typeArguments = type.aliasTypeArguments;
+                        writeSymbolTypeReference(type.aliasSymbol, typeArguments, 0, ts.length(typeArguments), nextFlags);
+                    }
+                    else if (type.flags & 196608 /* UnionOrIntersection */) {
+                        writeUnionOrIntersectionType(type, nextFlags);
+                    }
+                    else if (getObjectFlags(type) & (16 /* Anonymous */ | 32 /* Mapped */)) {
+                        writeAnonymousType(type, nextFlags);
+                    }
+                    else if (type.flags & 96 /* StringOrNumberLiteral */) {
+                        writer.writeStringLiteral(literalTypeToString(type));
+                    }
+                    else if (type.flags & 262144 /* Index */) {
+                        if (flags & 128 /* InElementType */) {
+                            writePunctuation(writer, 19 /* OpenParenToken */);
+                        }
+                        writer.writeKeyword("keyof");
+                        writeSpace(writer);
+                        writeType(type.type, 128 /* InElementType */);
+                        if (flags & 128 /* InElementType */) {
+                            writePunctuation(writer, 20 /* CloseParenToken */);
+                        }
+                    }
+                    else if (type.flags & 524288 /* IndexedAccess */) {
+                        writeType(type.objectType, 128 /* InElementType */);
+                        writePunctuation(writer, 21 /* OpenBracketToken */);
+                        writeType(type.indexType, 0 /* None */);
+                        writePunctuation(writer, 22 /* CloseBracketToken */);
+                    }
+                    else {
+                        // Should never get here
+                        // { ... }
+                        writePunctuation(writer, 17 /* OpenBraceToken */);
+                        writeSpace(writer);
+                        writePunctuation(writer, 24 /* DotDotDotToken */);
+                        writeSpace(writer);
+                        writePunctuation(writer, 18 /* CloseBraceToken */);
+                    }
+                }
+                function writeTypeList(types, delimiter) {
+                    for (var i = 0; i < types.length; i++) {
+                        if (i > 0) {
+                            if (delimiter !== 26 /* CommaToken */) {
+                                writeSpace(writer);
+                            }
+                            writePunctuation(writer, delimiter);
+                            writeSpace(writer);
+                        }
+                        writeType(types[i], delimiter === 26 /* CommaToken */ ? 0 /* None */ : 128 /* InElementType */);
+                    }
+                }
+                function writeSymbolTypeReference(symbol, typeArguments, pos, end, flags) {
+                    // Unnamed function expressions and arrow functions have reserved names that we don't want to display
+                    if (symbol.flags & 32 /* Class */ || !isReservedMemberName(symbol.name)) {
+                        buildSymbolDisplay(symbol, writer, enclosingDeclaration, 793064 /* Type */, 0 /* None */, flags);
+                    }
+                    if (pos < end) {
+                        writePunctuation(writer, 27 /* LessThanToken */);
+                        writeType(typeArguments[pos], 512 /* InFirstTypeArgument */);
+                        pos++;
+                        while (pos < end) {
+                            writePunctuation(writer, 26 /* CommaToken */);
+                            writeSpace(writer);
+                            writeType(typeArguments[pos], 0 /* None */);
+                            pos++;
+                        }
+                        writePunctuation(writer, 29 /* GreaterThanToken */);
+                    }
+                }
+                function writeTypeReference(type, flags) {
+                    var typeArguments = type.typeArguments || emptyArray;
+                    if (type.target === globalArrayType && !(flags & 1 /* WriteArrayAsGenericType */)) {
+                        writeType(typeArguments[0], 128 /* InElementType */);
+                        writePunctuation(writer, 21 /* OpenBracketToken */);
+                        writePunctuation(writer, 22 /* CloseBracketToken */);
+                    }
+                    else if (type.target.objectFlags & 8 /* Tuple */) {
+                        writePunctuation(writer, 21 /* OpenBracketToken */);
+                        writeTypeList(type.typeArguments.slice(0, getTypeReferenceArity(type)), 26 /* CommaToken */);
+                        writePunctuation(writer, 22 /* CloseBracketToken */);
+                    }
+                    else if (flags & 16384 /* WriteClassExpressionAsTypeLiteral */ &&
+                        type.symbol.valueDeclaration &&
+                        type.symbol.valueDeclaration.kind === 199 /* ClassExpression */) {
+                        writeAnonymousType(getDeclaredTypeOfClassOrInterface(type.symbol), flags);
+                    }
+                    else {
+                        // Write the type reference in the format f<A>.g<B>.C<X, Y> where A and B are type arguments
+                        // for outer type parameters, and f and g are the respective declaring containers of those
+                        // type parameters.
+                        var outerTypeParameters = type.target.outerTypeParameters;
+                        var i = 0;
+                        if (outerTypeParameters) {
+                            var length_2 = outerTypeParameters.length;
+                            while (i < length_2) {
+                                // Find group of type arguments for type parameters with the same declaring container.
+                                var start = i;
+                                var parent_10 = getParentSymbolOfTypeParameter(outerTypeParameters[i]);
+                                do {
+                                    i++;
+                                } while (i < length_2 && getParentSymbolOfTypeParameter(outerTypeParameters[i]) === parent_10);
+                                // When type parameters are their own type arguments for the whole group (i.e. we have
+                                // the default outer type arguments), we don't show the group.
+                                if (!ts.rangeEquals(outerTypeParameters, typeArguments, start, i)) {
+                                    writeSymbolTypeReference(parent_10, typeArguments, start, i, flags);
+                                    writePunctuation(writer, 23 /* DotToken */);
+                                }
+                            }
+                        }
+                        var typeParameterCount = (type.target.typeParameters || emptyArray).length;
+                        writeSymbolTypeReference(type.symbol, typeArguments, i, typeParameterCount, flags);
+                    }
+                }
+                function writeUnionOrIntersectionType(type, flags) {
+                    if (flags & 128 /* InElementType */) {
+                        writePunctuation(writer, 19 /* OpenParenToken */);
+                    }
+                    if (type.flags & 65536 /* Union */) {
+                        writeTypeList(formatUnionTypes(type.types), 49 /* BarToken */);
+                    }
+                    else {
+                        writeTypeList(type.types, 48 /* AmpersandToken */);
+                    }
+                    if (flags & 128 /* InElementType */) {
+                        writePunctuation(writer, 20 /* CloseParenToken */);
+                    }
+                }
+                function writeAnonymousType(type, flags) {
+                    var symbol = type.symbol;
+                    if (symbol) {
+                        // Always use 'typeof T' for type of class, enum, and module objects
+                        if (symbol.flags & 32 /* Class */ &&
+                            !getBaseTypeVariableOfClass(symbol) &&
+                            !(symbol.valueDeclaration.kind === 199 /* ClassExpression */ && flags & 16384 /* WriteClassExpressionAsTypeLiteral */) ||
+                            symbol.flags & (384 /* Enum */ | 512 /* ValueModule */)) {
+                            writeTypeOfSymbol(type, flags);
+                        }
+                        else if (shouldWriteTypeOfFunctionSymbol()) {
+                            writeTypeOfSymbol(type, flags);
+                        }
+                        else if (ts.contains(symbolStack, symbol)) {
+                            // If type is an anonymous type literal in a type alias declaration, use type alias name
+                            var typeAlias = getTypeAliasForTypeLiteral(type);
+                            if (typeAlias) {
+                                // The specified symbol flags need to be reinterpreted as type flags
+                                buildSymbolDisplay(typeAlias, writer, enclosingDeclaration, 793064 /* Type */, 0 /* None */, flags);
+                            }
+                            else {
+                                // Recursive usage, use any
+                                writeKeyword(writer, 119 /* AnyKeyword */);
+                            }
+                        }
+                        else {
+                            // Since instantiations of the same anonymous type have the same symbol, tracking symbols instead
+                            // of types allows us to catch circular references to instantiations of the same anonymous type
+                            // However, in case of class expressions, we want to write both the static side and the instance side.
+                            // We skip adding the static side so that the instance side has a chance to be written
+                            // before checking for circular references.
+                            if (!symbolStack) {
+                                symbolStack = [];
+                            }
+                            var isConstructorObject = type.flags & 32768 /* Object */ &&
+                                getObjectFlags(type) & 16 /* Anonymous */ &&
+                                type.symbol && type.symbol.flags & 32 /* Class */;
+                            if (isConstructorObject) {
+                                writeLiteralType(type, flags);
+                            }
+                            else {
+                                symbolStack.push(symbol);
+                                writeLiteralType(type, flags);
+                                symbolStack.pop();
+                            }
+                        }
+                    }
+                    else {
+                        // Anonymous types with no symbol are never circular
+                        writeLiteralType(type, flags);
+                    }
+                    function shouldWriteTypeOfFunctionSymbol() {
+                        var isStaticMethodSymbol = !!(symbol.flags & 8192 /* Method */ &&
+                            ts.forEach(symbol.declarations, function (declaration) { return ts.getModifierFlags(declaration) & 32 /* Static */; }));
+                        var isNonLocalFunctionSymbol = !!(symbol.flags & 16 /* Function */) &&
+                            (symbol.parent ||
+                                ts.forEach(symbol.declarations, function (declaration) {
+                                    return declaration.parent.kind === 265 /* SourceFile */ || declaration.parent.kind === 234 /* ModuleBlock */;
+                                }));
+                        if (isStaticMethodSymbol || isNonLocalFunctionSymbol) {
+                            // typeof is allowed only for static/non local functions
+                            return !!(flags & 4 /* UseTypeOfFunction */) ||
+                                (ts.contains(symbolStack, symbol)); // it is type of the symbol uses itself recursively
+                        }
+                    }
+                }
+                function writeTypeOfSymbol(type, typeFormatFlags) {
+                    writeKeyword(writer, 103 /* TypeOfKeyword */);
+                    writeSpace(writer);
+                    buildSymbolDisplay(type.symbol, writer, enclosingDeclaration, 107455 /* Value */, 0 /* None */, typeFormatFlags);
+                }
+                function writePropertyWithModifiers(prop) {
+                    if (isReadonlySymbol(prop)) {
+                        writeKeyword(writer, 131 /* ReadonlyKeyword */);
+                        writeSpace(writer);
+                    }
+                    buildSymbolDisplay(prop, writer);
+                    if (prop.flags & 67108864 /* Optional */) {
+                        writePunctuation(writer, 55 /* QuestionToken */);
+                    }
+                }
+                function shouldAddParenthesisAroundFunctionType(callSignature, flags) {
+                    if (flags & 128 /* InElementType */) {
+                        return true;
+                    }
+                    else if (flags & 512 /* InFirstTypeArgument */) {
+                        // Add parenthesis around function type for the first type argument to avoid ambiguity
+                        var typeParameters = callSignature.target && (flags & 64 /* WriteTypeArgumentsOfSignature */) ?
+                            callSignature.target.typeParameters : callSignature.typeParameters;
+                        return typeParameters && typeParameters.length !== 0;
+                    }
+                    return false;
+                }
+                function writeLiteralType(type, flags) {
+                    if (type.objectFlags & 32 /* Mapped */) {
+                        if (getConstraintTypeFromMappedType(type).flags & (16384 /* TypeParameter */ | 262144 /* Index */)) {
+                            writeMappedType(type);
+                            return;
+                        }
+                    }
+                    var resolved = resolveStructuredTypeMembers(type);
+                    if (!resolved.properties.length && !resolved.stringIndexInfo && !resolved.numberIndexInfo) {
+                        if (!resolved.callSignatures.length && !resolved.constructSignatures.length) {
+                            writePunctuation(writer, 17 /* OpenBraceToken */);
+                            writePunctuation(writer, 18 /* CloseBraceToken */);
+                            return;
+                        }
+                        if (resolved.callSignatures.length === 1 && !resolved.constructSignatures.length) {
+                            var parenthesizeSignature = shouldAddParenthesisAroundFunctionType(resolved.callSignatures[0], flags);
+                            if (parenthesizeSignature) {
+                                writePunctuation(writer, 19 /* OpenParenToken */);
+                            }
+                            buildSignatureDisplay(resolved.callSignatures[0], writer, enclosingDeclaration, globalFlagsToPass | 16 /* WriteArrowStyleSignature */, /*kind*/ undefined, symbolStack);
+                            if (parenthesizeSignature) {
+                                writePunctuation(writer, 20 /* CloseParenToken */);
+                            }
+                            return;
+                        }
+                        if (resolved.constructSignatures.length === 1 && !resolved.callSignatures.length) {
+                            if (flags & 128 /* InElementType */) {
+                                writePunctuation(writer, 19 /* OpenParenToken */);
+                            }
+                            writeKeyword(writer, 94 /* NewKeyword */);
+                            writeSpace(writer);
+                            buildSignatureDisplay(resolved.constructSignatures[0], writer, enclosingDeclaration, globalFlagsToPass | 16 /* WriteArrowStyleSignature */, /*kind*/ undefined, symbolStack);
+                            if (flags & 128 /* InElementType */) {
+                                writePunctuation(writer, 20 /* CloseParenToken */);
+                            }
+                            return;
+                        }
+                    }
+                    var saveInObjectTypeLiteral = inObjectTypeLiteral;
+                    inObjectTypeLiteral = true;
+                    writePunctuation(writer, 17 /* OpenBraceToken */);
+                    writer.writeLine();
+                    writer.increaseIndent();
+                    writeObjectLiteralType(resolved);
+                    writer.decreaseIndent();
+                    writePunctuation(writer, 18 /* CloseBraceToken */);
+                    inObjectTypeLiteral = saveInObjectTypeLiteral;
+                }
+                function writeObjectLiteralType(resolved) {
+                    for (var _i = 0, _a = resolved.callSignatures; _i < _a.length; _i++) {
+                        var signature = _a[_i];
+                        buildSignatureDisplay(signature, writer, enclosingDeclaration, globalFlagsToPass, /*kind*/ undefined, symbolStack);
+                        writePunctuation(writer, 25 /* SemicolonToken */);
+                        writer.writeLine();
+                    }
+                    for (var _b = 0, _c = resolved.constructSignatures; _b < _c.length; _b++) {
+                        var signature = _c[_b];
+                        buildSignatureDisplay(signature, writer, enclosingDeclaration, globalFlagsToPass, 1 /* Construct */, symbolStack);
+                        writePunctuation(writer, 25 /* SemicolonToken */);
+                        writer.writeLine();
+                    }
+                    buildIndexSignatureDisplay(resolved.stringIndexInfo, writer, 0 /* String */, enclosingDeclaration, globalFlags, symbolStack);
+                    buildIndexSignatureDisplay(resolved.numberIndexInfo, writer, 1 /* Number */, enclosingDeclaration, globalFlags, symbolStack);
+                    for (var _d = 0, _e = resolved.properties; _d < _e.length; _d++) {
+                        var p = _e[_d];
+                        if (globalFlags & 16384 /* WriteClassExpressionAsTypeLiteral */) {
+                            if (p.flags & 16777216 /* Prototype */) {
+                                continue;
+                            }
+                            if (ts.getDeclarationModifierFlagsFromSymbol(p) & (8 /* Private */ | 16 /* Protected */)) {
+                                writer.reportPrivateInBaseOfClassExpression(p.name);
+                            }
+                        }
+                        var t = getTypeOfSymbol(p);
+                        if (p.flags & (16 /* Function */ | 8192 /* Method */) && !getPropertiesOfObjectType(t).length) {
+                            var signatures = getSignaturesOfType(t, 0 /* Call */);
+                            for (var _f = 0, signatures_2 = signatures; _f < signatures_2.length; _f++) {
+                                var signature = signatures_2[_f];
+                                writePropertyWithModifiers(p);
+                                buildSignatureDisplay(signature, writer, enclosingDeclaration, globalFlagsToPass, /*kind*/ undefined, symbolStack);
+                                writePunctuation(writer, 25 /* SemicolonToken */);
+                                writer.writeLine();
+                            }
+                        }
+                        else {
+                            writePropertyWithModifiers(p);
+                            writePunctuation(writer, 56 /* ColonToken */);
+                            writeSpace(writer);
+                            writeType(t, globalFlags & 16384 /* WriteClassExpressionAsTypeLiteral */);
+                            writePunctuation(writer, 25 /* SemicolonToken */);
+                            writer.writeLine();
+                        }
                     }
                 }
-            }
-            return undefined;
-        }
-        function bindbreakOrContinueFlow(node, breakTarget, continueTarget) {
-            var flowLabel = node.kind === 210 /* BreakStatement */ ? breakTarget : continueTarget;
-            if (flowLabel) {
-                addAntecedent(flowLabel, currentFlow);
-                currentFlow = unreachableFlow;
-            }
-        }
-        function bindBreakOrContinueStatement(node) {
-            bind(node.label);
-            if (node.label) {
-                var activeLabel = findActiveLabel(node.label.text);
-                if (activeLabel) {
-                    activeLabel.referenced = true;
-                    bindbreakOrContinueFlow(node, activeLabel.breakTarget, activeLabel.continueTarget);
+                function writeMappedType(type) {
+                    writePunctuation(writer, 17 /* OpenBraceToken */);
+                    writer.writeLine();
+                    writer.increaseIndent();
+                    if (type.declaration.readonlyToken) {
+                        writeKeyword(writer, 131 /* ReadonlyKeyword */);
+                        writeSpace(writer);
+                    }
+                    writePunctuation(writer, 21 /* OpenBracketToken */);
+                    appendSymbolNameOnly(getTypeParameterFromMappedType(type).symbol, writer);
+                    writeSpace(writer);
+                    writeKeyword(writer, 92 /* InKeyword */);
+                    writeSpace(writer);
+                    writeType(getConstraintTypeFromMappedType(type), 0 /* None */);
+                    writePunctuation(writer, 22 /* CloseBracketToken */);
+                    if (type.declaration.questionToken) {
+                        writePunctuation(writer, 55 /* QuestionToken */);
+                    }
+                    writePunctuation(writer, 56 /* ColonToken */);
+                    writeSpace(writer);
+                    writeType(getTemplateTypeFromMappedType(type), 0 /* None */);
+                    writePunctuation(writer, 25 /* SemicolonToken */);
+                    writer.writeLine();
+                    writer.decreaseIndent();
+                    writePunctuation(writer, 18 /* CloseBraceToken */);
                 }
             }
-            else {
-                bindbreakOrContinueFlow(node, currentBreakTarget, currentContinueTarget);
-            }
-        }
-        function bindTryStatement(node) {
-            var postFinallyLabel = createBranchLabel();
-            var preTryFlow = currentFlow;
-            // TODO: Every statement in try block is potentially an exit point!
-            bind(node.tryBlock);
-            addAntecedent(postFinallyLabel, currentFlow);
-            if (node.catchClause) {
-                currentFlow = preTryFlow;
-                bind(node.catchClause);
-                addAntecedent(postFinallyLabel, currentFlow);
-            }
-            if (node.finallyBlock) {
-                currentFlow = preTryFlow;
-                bind(node.finallyBlock);
-            }
-            currentFlow = finishFlowLabel(postFinallyLabel);
-        }
-        function bindSwitchStatement(node) {
-            var postSwitchLabel = createBranchLabel();
-            bind(node.expression);
-            var saveBreakTarget = currentBreakTarget;
-            var savePreSwitchCaseFlow = preSwitchCaseFlow;
-            currentBreakTarget = postSwitchLabel;
-            preSwitchCaseFlow = currentFlow;
-            bind(node.caseBlock);
-            addAntecedent(postSwitchLabel, currentFlow);
-            var hasDefault = ts.forEach(node.caseBlock.clauses, function (c) { return c.kind === 250 /* DefaultClause */; });
-            // We mark a switch statement as possibly exhaustive if it has no default clause and if all
-            // case clauses have unreachable end points (e.g. they all return).
-            node.possiblyExhaustive = !hasDefault && !postSwitchLabel.antecedents;
-            if (!hasDefault) {
-                addAntecedent(postSwitchLabel, createFlowSwitchClause(preSwitchCaseFlow, node, 0, 0));
+            function buildTypeParameterDisplayFromSymbol(symbol, writer, enclosingDeclaration, flags) {
+                var targetSymbol = getTargetSymbol(symbol);
+                if (targetSymbol.flags & 32 /* Class */ || targetSymbol.flags & 64 /* Interface */ || targetSymbol.flags & 524288 /* TypeAlias */) {
+                    buildDisplayForTypeParametersAndDelimiters(getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol), writer, enclosingDeclaration, flags);
+                }
             }
-            currentBreakTarget = saveBreakTarget;
-            preSwitchCaseFlow = savePreSwitchCaseFlow;
-            currentFlow = finishFlowLabel(postSwitchLabel);
-        }
-        function bindCaseBlock(node) {
-            var clauses = node.clauses;
-            var fallthroughFlow = unreachableFlow;
-            for (var i = 0; i < clauses.length; i++) {
-                var clauseStart = i;
-                while (!clauses[i].statements.length && i + 1 < clauses.length) {
-                    bind(clauses[i]);
-                    i++;
+            function buildTypeParameterDisplay(tp, writer, enclosingDeclaration, flags, symbolStack) {
+                appendSymbolNameOnly(tp.symbol, writer);
+                var constraint = getConstraintOfTypeParameter(tp);
+                if (constraint) {
+                    writeSpace(writer);
+                    writeKeyword(writer, 85 /* ExtendsKeyword */);
+                    writeSpace(writer);
+                    buildTypeDisplay(constraint, writer, enclosingDeclaration, flags, symbolStack);
                 }
-                var preCaseLabel = createBranchLabel();
-                addAntecedent(preCaseLabel, createFlowSwitchClause(preSwitchCaseFlow, node.parent, clauseStart, i + 1));
-                addAntecedent(preCaseLabel, fallthroughFlow);
-                currentFlow = finishFlowLabel(preCaseLabel);
-                var clause = clauses[i];
-                bind(clause);
-                fallthroughFlow = currentFlow;
-                if (!(currentFlow.flags & 1 /* Unreachable */) && i !== clauses.length - 1 && options.noFallthroughCasesInSwitch) {
-                    errorOnFirstToken(clause, ts.Diagnostics.Fallthrough_case_in_switch);
+                var defaultType = getDefaultFromTypeParameter(tp);
+                if (defaultType) {
+                    writeSpace(writer);
+                    writePunctuation(writer, 58 /* EqualsToken */);
+                    writeSpace(writer);
+                    buildTypeDisplay(defaultType, writer, enclosingDeclaration, flags, symbolStack);
                 }
             }
-        }
-        function bindCaseClause(node) {
-            var saveCurrentFlow = currentFlow;
-            currentFlow = preSwitchCaseFlow;
-            bind(node.expression);
-            currentFlow = saveCurrentFlow;
-            ts.forEach(node.statements, bind);
-        }
-        function pushActiveLabel(name, breakTarget, continueTarget) {
-            var activeLabel = {
-                name: name,
-                breakTarget: breakTarget,
-                continueTarget: continueTarget,
-                referenced: false
-            };
-            (activeLabels || (activeLabels = [])).push(activeLabel);
-            return activeLabel;
-        }
-        function popActiveLabel() {
-            activeLabels.pop();
-        }
-        function bindLabeledStatement(node) {
-            var preStatementLabel = createLoopLabel();
-            var postStatementLabel = createBranchLabel();
-            bind(node.label);
-            addAntecedent(preStatementLabel, currentFlow);
-            var activeLabel = pushActiveLabel(node.label.text, postStatementLabel, preStatementLabel);
-            bind(node.statement);
-            popActiveLabel();
-            if (!activeLabel.referenced && !options.allowUnusedLabels) {
-                file.bindDiagnostics.push(ts.createDiagnosticForNode(node.label, ts.Diagnostics.Unused_label));
+            function buildParameterDisplay(p, writer, enclosingDeclaration, flags, symbolStack) {
+                var parameterNode = p.valueDeclaration;
+                if (parameterNode ? ts.isRestParameter(parameterNode) : isTransientSymbol(p) && p.isRestParameter) {
+                    writePunctuation(writer, 24 /* DotDotDotToken */);
+                }
+                if (parameterNode && ts.isBindingPattern(parameterNode.name)) {
+                    buildBindingPatternDisplay(parameterNode.name, writer, enclosingDeclaration, flags, symbolStack);
+                }
+                else {
+                    appendSymbolNameOnly(p, writer);
+                }
+                if (parameterNode && isOptionalParameter(parameterNode)) {
+                    writePunctuation(writer, 55 /* QuestionToken */);
+                }
+                writePunctuation(writer, 56 /* ColonToken */);
+                writeSpace(writer);
+                var type = getTypeOfSymbol(p);
+                if (parameterNode && isRequiredInitializedParameter(parameterNode)) {
+                    type = getNullableType(type, 2048 /* Undefined */);
+                }
+                buildTypeDisplay(type, writer, enclosingDeclaration, flags, symbolStack);
             }
-            addAntecedent(postStatementLabel, currentFlow);
-            currentFlow = finishFlowLabel(postStatementLabel);
-        }
-        function bindDestructuringTargetFlow(node) {
-            if (node.kind === 187 /* BinaryExpression */ && node.operatorToken.kind === 56 /* EqualsToken */) {
-                bindAssignmentTargetFlow(node.left);
+            function buildBindingPatternDisplay(bindingPattern, writer, enclosingDeclaration, flags, symbolStack) {
+                // We have to explicitly emit square bracket and bracket because these tokens are not stored inside the node.
+                if (bindingPattern.kind === 174 /* ObjectBindingPattern */) {
+                    writePunctuation(writer, 17 /* OpenBraceToken */);
+                    buildDisplayForCommaSeparatedList(bindingPattern.elements, writer, function (e) { return buildBindingElementDisplay(e, writer, enclosingDeclaration, flags, symbolStack); });
+                    writePunctuation(writer, 18 /* CloseBraceToken */);
+                }
+                else if (bindingPattern.kind === 175 /* ArrayBindingPattern */) {
+                    writePunctuation(writer, 21 /* OpenBracketToken */);
+                    var elements = bindingPattern.elements;
+                    buildDisplayForCommaSeparatedList(elements, writer, function (e) { return buildBindingElementDisplay(e, writer, enclosingDeclaration, flags, symbolStack); });
+                    if (elements && elements.hasTrailingComma) {
+                        writePunctuation(writer, 26 /* CommaToken */);
+                    }
+                    writePunctuation(writer, 22 /* CloseBracketToken */);
+                }
             }
-            else {
-                bindAssignmentTargetFlow(node);
+            function buildBindingElementDisplay(bindingElement, writer, enclosingDeclaration, flags, symbolStack) {
+                if (ts.isOmittedExpression(bindingElement)) {
+                    return;
+                }
+                ts.Debug.assert(bindingElement.kind === 176 /* BindingElement */);
+                if (bindingElement.propertyName) {
+                    writer.writeProperty(ts.getTextOfNode(bindingElement.propertyName));
+                    writePunctuation(writer, 56 /* ColonToken */);
+                    writeSpace(writer);
+                }
+                if (ts.isBindingPattern(bindingElement.name)) {
+                    buildBindingPatternDisplay(bindingElement.name, writer, enclosingDeclaration, flags, symbolStack);
+                }
+                else {
+                    if (bindingElement.dotDotDotToken) {
+                        writePunctuation(writer, 24 /* DotDotDotToken */);
+                    }
+                    appendSymbolNameOnly(bindingElement.symbol, writer);
+                }
             }
-        }
-        function bindAssignmentTargetFlow(node) {
-            if (isNarrowableReference(node)) {
-                currentFlow = createFlowAssignment(currentFlow, node);
+            function buildDisplayForTypeParametersAndDelimiters(typeParameters, writer, enclosingDeclaration, flags, symbolStack) {
+                if (typeParameters && typeParameters.length) {
+                    writePunctuation(writer, 27 /* LessThanToken */);
+                    buildDisplayForCommaSeparatedList(typeParameters, writer, function (p) { return buildTypeParameterDisplay(p, writer, enclosingDeclaration, flags, symbolStack); });
+                    writePunctuation(writer, 29 /* GreaterThanToken */);
+                }
             }
-            else if (node.kind === 170 /* ArrayLiteralExpression */) {
-                for (var _i = 0, _a = node.elements; _i < _a.length; _i++) {
-                    var e = _a[_i];
-                    if (e.kind === 191 /* SpreadElementExpression */) {
-                        bindAssignmentTargetFlow(e.expression);
-                    }
-                    else {
-                        bindDestructuringTargetFlow(e);
+            function buildDisplayForCommaSeparatedList(list, writer, action) {
+                for (var i = 0; i < list.length; i++) {
+                    if (i > 0) {
+                        writePunctuation(writer, 26 /* CommaToken */);
+                        writeSpace(writer);
                     }
+                    action(list[i]);
                 }
             }
-            else if (node.kind === 171 /* ObjectLiteralExpression */) {
-                for (var _b = 0, _c = node.properties; _b < _c.length; _b++) {
-                    var p = _c[_b];
-                    if (p.kind === 253 /* PropertyAssignment */) {
-                        bindDestructuringTargetFlow(p.initializer);
-                    }
-                    else if (p.kind === 254 /* ShorthandPropertyAssignment */) {
-                        bindAssignmentTargetFlow(p.name);
+            function buildDisplayForTypeArgumentsAndDelimiters(typeParameters, mapper, writer, enclosingDeclaration) {
+                if (typeParameters && typeParameters.length) {
+                    writePunctuation(writer, 27 /* LessThanToken */);
+                    var flags = 512 /* InFirstTypeArgument */;
+                    for (var i = 0; i < typeParameters.length; i++) {
+                        if (i > 0) {
+                            writePunctuation(writer, 26 /* CommaToken */);
+                            writeSpace(writer);
+                            flags = 0 /* None */;
+                        }
+                        buildTypeDisplay(mapper(typeParameters[i]), writer, enclosingDeclaration, flags);
                     }
+                    writePunctuation(writer, 29 /* GreaterThanToken */);
                 }
             }
-        }
-        function bindLogicalExpression(node, trueTarget, falseTarget) {
-            var preRightLabel = createBranchLabel();
-            if (node.operatorToken.kind === 51 /* AmpersandAmpersandToken */) {
-                bindCondition(node.left, preRightLabel, falseTarget);
-            }
-            else {
-                bindCondition(node.left, trueTarget, preRightLabel);
-            }
-            currentFlow = finishFlowLabel(preRightLabel);
-            bind(node.operatorToken);
-            bindCondition(node.right, trueTarget, falseTarget);
-        }
-        function bindPrefixUnaryExpressionFlow(node) {
-            if (node.operator === 49 /* ExclamationToken */) {
-                var saveTrueTarget = currentTrueTarget;
-                currentTrueTarget = currentFalseTarget;
-                currentFalseTarget = saveTrueTarget;
-                ts.forEachChild(node, bind);
-                currentFalseTarget = currentTrueTarget;
-                currentTrueTarget = saveTrueTarget;
+            function buildDisplayForParametersAndDelimiters(thisParameter, parameters, writer, enclosingDeclaration, flags, symbolStack) {
+                writePunctuation(writer, 19 /* OpenParenToken */);
+                if (thisParameter) {
+                    buildParameterDisplay(thisParameter, writer, enclosingDeclaration, flags, symbolStack);
+                }
+                for (var i = 0; i < parameters.length; i++) {
+                    if (i > 0 || thisParameter) {
+                        writePunctuation(writer, 26 /* CommaToken */);
+                        writeSpace(writer);
+                    }
+                    buildParameterDisplay(parameters[i], writer, enclosingDeclaration, flags, symbolStack);
+                }
+                writePunctuation(writer, 20 /* CloseParenToken */);
             }
-            else {
-                ts.forEachChild(node, bind);
-                if (node.operator === 57 /* PlusEqualsToken */ || node.operator === 42 /* MinusMinusToken */) {
-                    bindAssignmentTargetFlow(node.operand);
+            function buildTypePredicateDisplay(predicate, writer, enclosingDeclaration, flags, symbolStack) {
+                if (ts.isIdentifierTypePredicate(predicate)) {
+                    writer.writeParameter(predicate.parameterName);
+                }
+                else {
+                    writeKeyword(writer, 99 /* ThisKeyword */);
                 }
+                writeSpace(writer);
+                writeKeyword(writer, 126 /* IsKeyword */);
+                writeSpace(writer);
+                buildTypeDisplay(predicate.type, writer, enclosingDeclaration, flags, symbolStack);
             }
-        }
-        function bindPostfixUnaryExpressionFlow(node) {
-            ts.forEachChild(node, bind);
-            if (node.operator === 41 /* PlusPlusToken */ || node.operator === 42 /* MinusMinusToken */) {
-                bindAssignmentTargetFlow(node.operand);
+            function buildReturnTypeDisplay(signature, writer, enclosingDeclaration, flags, symbolStack) {
+                var returnType = getReturnTypeOfSignature(signature);
+                if (flags & 4096 /* SuppressAnyReturnType */ && isTypeAny(returnType)) {
+                    return;
+                }
+                if (flags & 16 /* WriteArrowStyleSignature */) {
+                    writeSpace(writer);
+                    writePunctuation(writer, 36 /* EqualsGreaterThanToken */);
+                }
+                else {
+                    writePunctuation(writer, 56 /* ColonToken */);
+                }
+                writeSpace(writer);
+                if (signature.typePredicate) {
+                    buildTypePredicateDisplay(signature.typePredicate, writer, enclosingDeclaration, flags, symbolStack);
+                }
+                else {
+                    buildTypeDisplay(returnType, writer, enclosingDeclaration, flags, symbolStack);
+                }
             }
-        }
-        function bindBinaryExpressionFlow(node) {
-            var operator = node.operatorToken.kind;
-            if (operator === 51 /* AmpersandAmpersandToken */ || operator === 52 /* BarBarToken */) {
-                if (isTopLevelLogicalExpression(node)) {
-                    var postExpressionLabel = createBranchLabel();
-                    bindLogicalExpression(node, postExpressionLabel, postExpressionLabel);
-                    currentFlow = finishFlowLabel(postExpressionLabel);
+            function buildSignatureDisplay(signature, writer, enclosingDeclaration, flags, kind, symbolStack) {
+                if (kind === 1 /* Construct */) {
+                    writeKeyword(writer, 94 /* NewKeyword */);
+                    writeSpace(writer);
+                }
+                if (signature.target && (flags & 64 /* WriteTypeArgumentsOfSignature */)) {
+                    // Instantiated signature, write type arguments instead
+                    // This is achieved by passing in the mapper separately
+                    buildDisplayForTypeArgumentsAndDelimiters(signature.target.typeParameters, signature.mapper, writer, enclosingDeclaration);
                 }
                 else {
-                    bindLogicalExpression(node, currentTrueTarget, currentFalseTarget);
+                    buildDisplayForTypeParametersAndDelimiters(signature.typeParameters, writer, enclosingDeclaration, flags, symbolStack);
                 }
+                buildDisplayForParametersAndDelimiters(signature.thisParameter, signature.parameters, writer, enclosingDeclaration, flags, symbolStack);
+                buildReturnTypeDisplay(signature, writer, enclosingDeclaration, flags, symbolStack);
             }
-            else {
-                ts.forEachChild(node, bind);
-                if (operator === 56 /* EqualsToken */ && !ts.isAssignmentTarget(node)) {
-                    bindAssignmentTargetFlow(node.left);
+            function buildIndexSignatureDisplay(info, writer, kind, enclosingDeclaration, globalFlags, symbolStack) {
+                if (info) {
+                    if (info.isReadonly) {
+                        writeKeyword(writer, 131 /* ReadonlyKeyword */);
+                        writeSpace(writer);
+                    }
+                    writePunctuation(writer, 21 /* OpenBracketToken */);
+                    writer.writeParameter(info.declaration ? ts.declarationNameToString(info.declaration.parameters[0].name) : "x");
+                    writePunctuation(writer, 56 /* ColonToken */);
+                    writeSpace(writer);
+                    switch (kind) {
+                        case 1 /* Number */:
+                            writeKeyword(writer, 133 /* NumberKeyword */);
+                            break;
+                        case 0 /* String */:
+                            writeKeyword(writer, 136 /* StringKeyword */);
+                            break;
+                    }
+                    writePunctuation(writer, 22 /* CloseBracketToken */);
+                    writePunctuation(writer, 56 /* ColonToken */);
+                    writeSpace(writer);
+                    buildTypeDisplay(info.type, writer, enclosingDeclaration, globalFlags, symbolStack);
+                    writePunctuation(writer, 25 /* SemicolonToken */);
+                    writer.writeLine();
                 }
             }
+            return _displayBuilder || (_displayBuilder = {
+                buildSymbolDisplay: buildSymbolDisplay,
+                buildTypeDisplay: buildTypeDisplay,
+                buildTypeParameterDisplay: buildTypeParameterDisplay,
+                buildTypePredicateDisplay: buildTypePredicateDisplay,
+                buildParameterDisplay: buildParameterDisplay,
+                buildDisplayForParametersAndDelimiters: buildDisplayForParametersAndDelimiters,
+                buildDisplayForTypeParametersAndDelimiters: buildDisplayForTypeParametersAndDelimiters,
+                buildTypeParameterDisplayFromSymbol: buildTypeParameterDisplayFromSymbol,
+                buildSignatureDisplay: buildSignatureDisplay,
+                buildIndexSignatureDisplay: buildIndexSignatureDisplay,
+                buildReturnTypeDisplay: buildReturnTypeDisplay
+            });
         }
-        function bindDeleteExpressionFlow(node) {
-            ts.forEachChild(node, bind);
-            if (node.expression.kind === 172 /* PropertyAccessExpression */) {
-                bindAssignmentTargetFlow(node.expression);
+        function isDeclarationVisible(node) {
+            if (node) {
+                var links = getNodeLinks(node);
+                if (links.isVisible === undefined) {
+                    links.isVisible = !!determineIfDeclarationIsVisible();
+                }
+                return links.isVisible;
+            }
+            return false;
+            function determineIfDeclarationIsVisible() {
+                switch (node.kind) {
+                    case 176 /* BindingElement */:
+                        return isDeclarationVisible(node.parent.parent);
+                    case 226 /* VariableDeclaration */:
+                        if (ts.isBindingPattern(node.name) &&
+                            !node.name.elements.length) {
+                            // If the binding pattern is empty, this variable declaration is not visible
+                            return false;
+                        }
+                    // falls through
+                    case 233 /* ModuleDeclaration */:
+                    case 229 /* ClassDeclaration */:
+                    case 230 /* InterfaceDeclaration */:
+                    case 231 /* TypeAliasDeclaration */:
+                    case 228 /* FunctionDeclaration */:
+                    case 232 /* EnumDeclaration */:
+                    case 237 /* ImportEqualsDeclaration */:
+                        // external module augmentation is always visible
+                        if (ts.isExternalModuleAugmentation(node)) {
+                            return true;
+                        }
+                        var parent_11 = getDeclarationContainer(node);
+                        // If the node is not exported or it is not ambient module element (except import declaration)
+                        if (!(ts.getCombinedModifierFlags(node) & 1 /* Export */) &&
+                            !(node.kind !== 237 /* ImportEqualsDeclaration */ && parent_11.kind !== 265 /* SourceFile */ && ts.isInAmbientContext(parent_11))) {
+                            return isGlobalSourceFile(parent_11);
+                        }
+                        // Exported members/ambient module elements (exception import declaration) are visible if parent is visible
+                        return isDeclarationVisible(parent_11);
+                    case 149 /* PropertyDeclaration */:
+                    case 148 /* PropertySignature */:
+                    case 153 /* GetAccessor */:
+                    case 154 /* SetAccessor */:
+                    case 151 /* MethodDeclaration */:
+                    case 150 /* MethodSignature */:
+                        if (ts.getModifierFlags(node) & (8 /* Private */ | 16 /* Protected */)) {
+                            // Private/protected properties/methods are not visible
+                            return false;
+                        }
+                    // Public properties/methods are visible if its parents are visible, so:
+                    // falls through
+                    case 152 /* Constructor */:
+                    case 156 /* ConstructSignature */:
+                    case 155 /* CallSignature */:
+                    case 157 /* IndexSignature */:
+                    case 146 /* Parameter */:
+                    case 234 /* ModuleBlock */:
+                    case 160 /* FunctionType */:
+                    case 161 /* ConstructorType */:
+                    case 163 /* TypeLiteral */:
+                    case 159 /* TypeReference */:
+                    case 164 /* ArrayType */:
+                    case 165 /* TupleType */:
+                    case 166 /* UnionType */:
+                    case 167 /* IntersectionType */:
+                    case 168 /* ParenthesizedType */:
+                        return isDeclarationVisible(node.parent);
+                    // Default binding, import specifier and namespace import is visible
+                    // only on demand so by default it is not visible
+                    case 239 /* ImportClause */:
+                    case 240 /* NamespaceImport */:
+                    case 242 /* ImportSpecifier */:
+                        return false;
+                    // Type parameters are always visible
+                    case 145 /* TypeParameter */:
+                    // Source file and namespace export are always visible
+                    case 265 /* SourceFile */:
+                    case 236 /* NamespaceExportDeclaration */:
+                        return true;
+                    // Export assignments do not create name bindings outside the module
+                    case 243 /* ExportAssignment */:
+                        return false;
+                    default:
+                        return false;
+                }
             }
         }
-        function bindConditionalExpressionFlow(node) {
-            var trueLabel = createBranchLabel();
-            var falseLabel = createBranchLabel();
-            var postExpressionLabel = createBranchLabel();
-            bindCondition(node.condition, trueLabel, falseLabel);
-            currentFlow = finishFlowLabel(trueLabel);
-            bind(node.whenTrue);
-            addAntecedent(postExpressionLabel, currentFlow);
-            currentFlow = finishFlowLabel(falseLabel);
-            bind(node.whenFalse);
-            addAntecedent(postExpressionLabel, currentFlow);
-            currentFlow = finishFlowLabel(postExpressionLabel);
+        function collectLinkedAliases(node) {
+            var exportSymbol;
+            if (node.parent && node.parent.kind === 243 /* ExportAssignment */) {
+                exportSymbol = resolveName(node.parent, node.text, 107455 /* Value */ | 793064 /* Type */ | 1920 /* Namespace */ | 8388608 /* Alias */, ts.Diagnostics.Cannot_find_name_0, node);
+            }
+            else if (node.parent.kind === 246 /* ExportSpecifier */) {
+                exportSymbol = getTargetOfExportSpecifier(node.parent, 107455 /* Value */ | 793064 /* Type */ | 1920 /* Namespace */ | 8388608 /* Alias */);
+            }
+            var result = [];
+            if (exportSymbol) {
+                buildVisibleNodeList(exportSymbol.declarations);
+            }
+            return result;
+            function buildVisibleNodeList(declarations) {
+                ts.forEach(declarations, function (declaration) {
+                    getNodeLinks(declaration).isVisible = true;
+                    var resultNode = getAnyImportSyntax(declaration) || declaration;
+                    if (!ts.contains(result, resultNode)) {
+                        result.push(resultNode);
+                    }
+                    if (ts.isInternalModuleImportEqualsDeclaration(declaration)) {
+                        // Add the referenced top container visible
+                        var internalModuleReference = declaration.moduleReference;
+                        var firstIdentifier = getFirstIdentifier(internalModuleReference);
+                        var importSymbol = resolveName(declaration, firstIdentifier.text, 107455 /* Value */ | 793064 /* Type */ | 1920 /* Namespace */, undefined, undefined);
+                        if (importSymbol) {
+                            buildVisibleNodeList(importSymbol.declarations);
+                        }
+                    }
+                });
+            }
         }
-        function bindInitializedVariableFlow(node) {
-            var name = !ts.isOmittedExpression(node) ? node.name : undefined;
-            if (ts.isBindingPattern(name)) {
-                for (var _i = 0, _a = name.elements; _i < _a.length; _i++) {
-                    var child = _a[_i];
-                    bindInitializedVariableFlow(child);
+        /**
+         * Push an entry on the type resolution stack. If an entry with the given target and the given property name
+         * is already on the stack, and no entries in between already have a type, then a circularity has occurred.
+         * In this case, the result values of the existing entry and all entries pushed after it are changed to false,
+         * and the value false is returned. Otherwise, the new entry is just pushed onto the stack, and true is returned.
+         * In order to see if the same query has already been done before, the target object and the propertyName both
+         * must match the one passed in.
+         *
+         * @param target The symbol, type, or signature whose type is being queried
+         * @param propertyName The property name that should be used to query the target for its type
+         */
+        function pushTypeResolution(target, propertyName) {
+            var resolutionCycleStartIndex = findResolutionCycleStartIndex(target, propertyName);
+            if (resolutionCycleStartIndex >= 0) {
+                // A cycle was found
+                var length_3 = resolutionTargets.length;
+                for (var i = resolutionCycleStartIndex; i < length_3; i++) {
+                    resolutionResults[i] = false;
                 }
+                return false;
             }
-            else {
-                currentFlow = createFlowAssignment(currentFlow, node);
-            }
+            resolutionTargets.push(target);
+            resolutionResults.push(/*items*/ true);
+            resolutionPropertyNames.push(propertyName);
+            return true;
         }
-        function bindVariableDeclarationFlow(node) {
-            ts.forEachChild(node, bind);
-            if (node.initializer || node.parent.parent.kind === 207 /* ForInStatement */ || node.parent.parent.kind === 208 /* ForOfStatement */) {
-                bindInitializedVariableFlow(node);
+        function findResolutionCycleStartIndex(target, propertyName) {
+            for (var i = resolutionTargets.length - 1; i >= 0; i--) {
+                if (hasType(resolutionTargets[i], resolutionPropertyNames[i])) {
+                    return -1;
+                }
+                if (resolutionTargets[i] === target && resolutionPropertyNames[i] === propertyName) {
+                    return i;
+                }
             }
+            return -1;
         }
-        function bindCallExpressionFlow(node) {
-            // If the target of the call expression is a function expression or arrow function we have
-            // an immediately invoked function expression (IIFE). Initialize the flowNode property to
-            // the current control flow (which includes evaluation of the IIFE arguments).
-            var expr = node.expression;
-            while (expr.kind === 178 /* ParenthesizedExpression */) {
-                expr = expr.expression;
+        function hasType(target, propertyName) {
+            if (propertyName === 0 /* Type */) {
+                return getSymbolLinks(target).type;
             }
-            if (expr.kind === 179 /* FunctionExpression */ || expr.kind === 180 /* ArrowFunction */) {
-                ts.forEach(node.typeArguments, bind);
-                ts.forEach(node.arguments, bind);
-                bind(node.expression);
+            if (propertyName === 2 /* DeclaredType */) {
+                return getSymbolLinks(target).declaredType;
             }
-            else {
-                ts.forEachChild(node, bind);
+            if (propertyName === 1 /* ResolvedBaseConstructorType */) {
+                return target.resolvedBaseConstructorType;
             }
-        }
-        function getContainerFlags(node) {
-            switch (node.kind) {
-                case 192 /* ClassExpression */:
-                case 221 /* ClassDeclaration */:
-                case 224 /* EnumDeclaration */:
-                case 171 /* ObjectLiteralExpression */:
-                case 159 /* TypeLiteral */:
-                case 281 /* JSDocTypeLiteral */:
-                case 265 /* JSDocRecordType */:
-                    return 1 /* IsContainer */;
-                case 222 /* InterfaceDeclaration */:
-                    return 1 /* IsContainer */ | 64 /* IsInterface */;
-                case 269 /* JSDocFunctionType */:
-                case 225 /* ModuleDeclaration */:
-                case 223 /* TypeAliasDeclaration */:
-                    return 1 /* IsContainer */ | 32 /* HasLocals */;
-                case 256 /* SourceFile */:
-                    return 1 /* IsContainer */ | 4 /* IsControlFlowContainer */ | 32 /* HasLocals */;
-                case 148 /* Constructor */:
-                case 220 /* FunctionDeclaration */:
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                case 151 /* CallSignature */:
-                case 152 /* ConstructSignature */:
-                case 153 /* IndexSignature */:
-                case 156 /* FunctionType */:
-                case 157 /* ConstructorType */:
-                    return 1 /* IsContainer */ | 4 /* IsControlFlowContainer */ | 32 /* HasLocals */ | 8 /* IsFunctionLike */;
-                case 179 /* FunctionExpression */:
-                case 180 /* ArrowFunction */:
-                    return 1 /* IsContainer */ | 4 /* IsControlFlowContainer */ | 32 /* HasLocals */ | 8 /* IsFunctionLike */ | 16 /* IsFunctionExpression */;
-                case 226 /* ModuleBlock */:
-                    return 4 /* IsControlFlowContainer */;
-                case 145 /* PropertyDeclaration */:
-                    return node.initializer ? 4 /* IsControlFlowContainer */ : 0;
-                case 252 /* CatchClause */:
-                case 206 /* ForStatement */:
-                case 207 /* ForInStatement */:
-                case 208 /* ForOfStatement */:
-                case 227 /* CaseBlock */:
-                    return 2 /* IsBlockScopedContainer */;
-                case 199 /* Block */:
-                    // do not treat blocks directly inside a function as a block-scoped-container.
-                    // Locals that reside in this block should go to the function locals. Otherwise 'x'
-                    // would not appear to be a redeclaration of a block scoped local in the following
-                    // example:
-                    //
-                    //      function foo() {
-                    //          var x;
-                    //          let x;
-                    //      }
-                    //
-                    // If we placed 'var x' into the function locals and 'let x' into the locals of
-                    // the block, then there would be no collision.
-                    //
-                    // By not creating a new block-scoped-container here, we ensure that both 'var x'
-                    // and 'let x' go into the Function-container's locals, and we do get a collision
-                    // conflict.
-                    return ts.isFunctionLike(node.parent) ? 0 /* None */ : 2 /* IsBlockScopedContainer */;
+            if (propertyName === 3 /* ResolvedReturnType */) {
+                return target.resolvedReturnType;
             }
-            return 0 /* None */;
+            ts.Debug.fail("Unhandled TypeSystemPropertyName " + propertyName);
         }
-        function addToContainerChain(next) {
-            if (lastContainer) {
-                lastContainer.nextContainer = next;
-            }
-            lastContainer = next;
+        // Pop an entry from the type resolution stack and return its associated result value. The result value will
+        // be true if no circularities were detected, or false if a circularity was found.
+        function popTypeResolution() {
+            resolutionTargets.pop();
+            resolutionPropertyNames.pop();
+            return resolutionResults.pop();
         }
-        function declareSymbolAndAddToSymbolTable(node, symbolFlags, symbolExcludes) {
-            // Just call this directly so that the return type of this function stays "void".
-            return declareSymbolAndAddToSymbolTableWorker(node, symbolFlags, symbolExcludes);
+        function getDeclarationContainer(node) {
+            node = ts.findAncestor(ts.getRootDeclaration(node), function (node) {
+                switch (node.kind) {
+                    case 226 /* VariableDeclaration */:
+                    case 227 /* VariableDeclarationList */:
+                    case 242 /* ImportSpecifier */:
+                    case 241 /* NamedImports */:
+                    case 240 /* NamespaceImport */:
+                    case 239 /* ImportClause */:
+                        return false;
+                    default:
+                        return true;
+                }
+            });
+            return node && node.parent;
         }
-        function declareSymbolAndAddToSymbolTableWorker(node, symbolFlags, symbolExcludes) {
-            switch (container.kind) {
-                // Modules, source files, and classes need specialized handling for how their
-                // members are declared (for example, a member of a class will go into a specific
-                // symbol table depending on if it is static or not). We defer to specialized
-                // handlers to take care of declaring these child members.
-                case 225 /* ModuleDeclaration */:
-                    return declareModuleMember(node, symbolFlags, symbolExcludes);
-                case 256 /* SourceFile */:
-                    return declareSourceFileMember(node, symbolFlags, symbolExcludes);
-                case 192 /* ClassExpression */:
-                case 221 /* ClassDeclaration */:
-                    return declareClassMember(node, symbolFlags, symbolExcludes);
-                case 224 /* EnumDeclaration */:
-                    return declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
-                case 159 /* TypeLiteral */:
-                case 171 /* ObjectLiteralExpression */:
-                case 222 /* InterfaceDeclaration */:
-                case 265 /* JSDocRecordType */:
-                case 281 /* JSDocTypeLiteral */:
-                    // Interface/Object-types always have their children added to the 'members' of
-                    // their container. They are only accessible through an instance of their
-                    // container, and are never in scope otherwise (even inside the body of the
-                    // object / type / interface declaring them). An exception is type parameters,
-                    // which are in scope without qualification (similar to 'locals').
-                    return declareSymbol(container.symbol.members, container.symbol, node, symbolFlags, symbolExcludes);
-                case 156 /* FunctionType */:
-                case 157 /* ConstructorType */:
-                case 151 /* CallSignature */:
-                case 152 /* ConstructSignature */:
-                case 153 /* IndexSignature */:
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                case 148 /* Constructor */:
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                case 220 /* FunctionDeclaration */:
-                case 179 /* FunctionExpression */:
-                case 180 /* ArrowFunction */:
-                case 269 /* JSDocFunctionType */:
-                case 223 /* TypeAliasDeclaration */:
-                    // All the children of these container types are never visible through another
-                    // symbol (i.e. through another symbol's 'exports' or 'members').  Instead,
-                    // they're only accessed 'lexically' (i.e. from code that exists underneath
-                    // their container in the tree.  To accomplish this, we simply add their declared
-                    // symbol to the 'locals' of the container.  These symbols can then be found as
-                    // the type checker walks up the containers, checking them for matching names.
-                    return declareSymbol(container.locals, /*parent*/ undefined, node, symbolFlags, symbolExcludes);
-            }
+        function getTypeOfPrototypeProperty(prototype) {
+            // TypeScript 1.0 spec (April 2014): 8.4
+            // Every class automatically contains a static property member named 'prototype',
+            // the type of which is an instantiation of the class type with type Any supplied as a type argument for each type parameter.
+            // It is an error to explicitly declare a static property member with the name 'prototype'.
+            var classType = getDeclaredTypeOfSymbol(getParentOfSymbol(prototype));
+            return classType.typeParameters ? createTypeReference(classType, ts.map(classType.typeParameters, function (_) { return anyType; })) : classType;
+        }
+        // Return the type of the given property in the given type, or undefined if no such property exists
+        function getTypeOfPropertyOfType(type, name) {
+            var prop = getPropertyOfType(type, name);
+            return prop ? getTypeOfSymbol(prop) : undefined;
         }
-        function declareClassMember(node, symbolFlags, symbolExcludes) {
-            return ts.hasModifier(node, 32 /* Static */)
-                ? declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes)
-                : declareSymbol(container.symbol.members, container.symbol, node, symbolFlags, symbolExcludes);
+        function isTypeAny(type) {
+            return type && (type.flags & 1 /* Any */) !== 0;
         }
-        function declareSourceFileMember(node, symbolFlags, symbolExcludes) {
-            return ts.isExternalModule(file)
-                ? declareModuleMember(node, symbolFlags, symbolExcludes)
-                : declareSymbol(file.locals, undefined, node, symbolFlags, symbolExcludes);
+        // Return the type of a binding element parent. We check SymbolLinks first to see if a type has been
+        // assigned by contextual typing.
+        function getTypeForBindingElementParent(node) {
+            var symbol = getSymbolOfNode(node);
+            return symbol && getSymbolLinks(symbol).type || getTypeForVariableLikeDeclaration(node, /*includeOptionality*/ false);
         }
-        function hasExportDeclarations(node) {
-            var body = node.kind === 256 /* SourceFile */ ? node : node.body;
-            if (body && (body.kind === 256 /* SourceFile */ || body.kind === 226 /* ModuleBlock */)) {
-                for (var _i = 0, _a = body.statements; _i < _a.length; _i++) {
-                    var stat = _a[_i];
-                    if (stat.kind === 236 /* ExportDeclaration */ || stat.kind === 235 /* ExportAssignment */) {
-                        return true;
-                    }
-                }
-            }
-            return false;
+        function isComputedNonLiteralName(name) {
+            return name.kind === 144 /* ComputedPropertyName */ && !ts.isStringOrNumericLiteral(name.expression);
         }
-        function setExportContextFlag(node) {
-            // A declaration source file or ambient module declaration that contains no export declarations (but possibly regular
-            // declarations with export modifiers) is an export context in which declarations are implicitly exported.
-            if (ts.isInAmbientContext(node) && !hasExportDeclarations(node)) {
-                node.flags |= 32 /* ExportContext */;
+        function getRestType(source, properties, symbol) {
+            source = filterType(source, function (t) { return !(t.flags & 6144 /* Nullable */); });
+            if (source.flags & 8192 /* Never */) {
+                return emptyObjectType;
             }
-            else {
-                node.flags &= ~32 /* ExportContext */;
+            if (source.flags & 65536 /* Union */) {
+                return mapType(source, function (t) { return getRestType(t, properties, symbol); });
             }
+            var members = ts.createMap();
+            var names = ts.createMap();
+            for (var _i = 0, properties_2 = properties; _i < properties_2.length; _i++) {
+                var name_16 = properties_2[_i];
+                names.set(ts.getTextOfPropertyName(name_16), true);
+            }
+            for (var _a = 0, _b = getPropertiesOfType(source); _a < _b.length; _a++) {
+                var prop = _b[_a];
+                var inNamesToRemove = names.has(prop.name);
+                var isPrivate = ts.getDeclarationModifierFlagsFromSymbol(prop) & (8 /* Private */ | 16 /* Protected */);
+                var isSetOnlyAccessor = prop.flags & 65536 /* SetAccessor */ && !(prop.flags & 32768 /* GetAccessor */);
+                if (!inNamesToRemove && !isPrivate && !isClassMethod(prop) && !isSetOnlyAccessor) {
+                    members.set(prop.name, prop);
+                }
+            }
+            var stringIndexInfo = getIndexInfoOfType(source, 0 /* String */);
+            var numberIndexInfo = getIndexInfoOfType(source, 1 /* Number */);
+            return createAnonymousType(symbol, members, emptyArray, emptyArray, stringIndexInfo, numberIndexInfo);
         }
-        function bindModuleDeclaration(node) {
-            setExportContextFlag(node);
-            if (ts.isAmbientModule(node)) {
-                if (ts.hasModifier(node, 1 /* Export */)) {
-                    errorOnFirstToken(node, ts.Diagnostics.export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always_visible);
+        /** Return the inferred type for a binding element */
+        function getTypeForBindingElement(declaration) {
+            var pattern = declaration.parent;
+            var parentType = getTypeForBindingElementParent(pattern.parent);
+            // If parent has the unknown (error) type, then so does this binding element
+            if (parentType === unknownType) {
+                return unknownType;
+            }
+            // If no type was specified or inferred for parent, or if the specified or inferred type is any,
+            // infer from the initializer of the binding element if one is present. Otherwise, go with the
+            // undefined or any type of the parent.
+            if (!parentType || isTypeAny(parentType)) {
+                if (declaration.initializer) {
+                    return checkDeclarationInitializer(declaration);
                 }
-                if (ts.isExternalModuleAugmentation(node)) {
-                    declareSymbolAndAddToSymbolTable(node, 1024 /* NamespaceModule */, 0 /* NamespaceModuleExcludes */);
+                return parentType;
+            }
+            var type;
+            if (pattern.kind === 174 /* ObjectBindingPattern */) {
+                if (declaration.dotDotDotToken) {
+                    if (!isValidSpreadType(parentType)) {
+                        error(declaration, ts.Diagnostics.Rest_types_may_only_be_created_from_object_types);
+                        return unknownType;
+                    }
+                    var literalMembers = [];
+                    for (var _i = 0, _a = pattern.elements; _i < _a.length; _i++) {
+                        var element = _a[_i];
+                        if (!element.dotDotDotToken) {
+                            literalMembers.push(element.propertyName || element.name);
+                        }
+                    }
+                    type = getRestType(parentType, literalMembers, declaration.symbol);
                 }
                 else {
-                    var pattern = void 0;
-                    if (node.name.kind === 9 /* StringLiteral */) {
-                        var text = node.name.text;
-                        if (ts.hasZeroOrOneAsteriskCharacter(text)) {
-                            pattern = ts.tryParsePattern(text);
-                        }
-                        else {
-                            errorOnFirstToken(node.name, ts.Diagnostics.Pattern_0_can_have_at_most_one_Asterisk_character, text);
-                        }
+                    // Use explicitly specified property name ({ p: xxx } form), or otherwise the implied name ({ p } form)
+                    var name_17 = declaration.propertyName || declaration.name;
+                    if (isComputedNonLiteralName(name_17)) {
+                        // computed properties with non-literal names are treated as 'any'
+                        return anyType;
                     }
-                    var symbol = declareSymbolAndAddToSymbolTable(node, 512 /* ValueModule */, 106639 /* ValueModuleExcludes */);
-                    if (pattern) {
-                        (file.patternAmbientModules || (file.patternAmbientModules = [])).push({ pattern: pattern, symbol: symbol });
+                    if (declaration.initializer) {
+                        getContextualType(declaration.initializer);
+                    }
+                    // Use type of the specified property, or otherwise, for a numeric name, the type of the numeric index signature,
+                    // or otherwise the type of the string index signature.
+                    var text = ts.getTextOfPropertyName(name_17);
+                    type = getTypeOfPropertyOfType(parentType, text) ||
+                        isNumericLiteralName(text) && getIndexTypeOfType(parentType, 1 /* Number */) ||
+                        getIndexTypeOfType(parentType, 0 /* String */);
+                    if (!type) {
+                        error(name_17, ts.Diagnostics.Type_0_has_no_property_1_and_no_string_index_signature, typeToString(parentType), ts.declarationNameToString(name_17));
+                        return unknownType;
                     }
                 }
             }
             else {
-                var state = getModuleInstanceState(node);
-                if (state === 0 /* NonInstantiated */) {
-                    declareSymbolAndAddToSymbolTable(node, 1024 /* NamespaceModule */, 0 /* NamespaceModuleExcludes */);
+                // This elementType will be used if the specific property corresponding to this index is not
+                // present (aka the tuple element property). This call also checks that the parentType is in
+                // fact an iterable or array (depending on target language).
+                var elementType = checkIteratedTypeOrElementType(parentType, pattern, /*allowStringInput*/ false, /*allowAsyncIterables*/ false);
+                if (declaration.dotDotDotToken) {
+                    // Rest element has an array type with the same element type as the parent type
+                    type = createArrayType(elementType);
                 }
                 else {
-                    declareSymbolAndAddToSymbolTable(node, 512 /* ValueModule */, 106639 /* ValueModuleExcludes */);
-                    if (node.symbol.flags & (16 /* Function */ | 32 /* Class */ | 256 /* RegularEnum */)) {
-                        // if module was already merged with some function, class or non-const enum
-                        // treat is a non-const-enum-only
-                        node.symbol.constEnumOnlyModule = false;
-                    }
-                    else {
-                        var currentModuleIsConstEnumOnly = state === 2 /* ConstEnumOnly */;
-                        if (node.symbol.constEnumOnlyModule === undefined) {
-                            // non-merged case - use the current state
-                            node.symbol.constEnumOnlyModule = currentModuleIsConstEnumOnly;
+                    // Use specific property type when parent is a tuple or numeric index type when parent is an array
+                    var propName = "" + ts.indexOf(pattern.elements, declaration);
+                    type = isTupleLikeType(parentType)
+                        ? getTypeOfPropertyOfType(parentType, propName)
+                        : elementType;
+                    if (!type) {
+                        if (isTupleType(parentType)) {
+                            error(declaration, ts.Diagnostics.Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2, typeToString(parentType), getTypeReferenceArity(parentType), pattern.elements.length);
                         }
                         else {
-                            // merged case: module is const enum only if all its pieces are non-instantiated or const enum
-                            node.symbol.constEnumOnlyModule = node.symbol.constEnumOnlyModule && currentModuleIsConstEnumOnly;
+                            error(declaration, ts.Diagnostics.Type_0_has_no_property_1, typeToString(parentType), propName);
                         }
+                        return unknownType;
                     }
                 }
             }
+            // In strict null checking mode, if a default value of a non-undefined type is specified, remove
+            // undefined from the final type.
+            if (strictNullChecks && declaration.initializer && !(getFalsyFlags(checkExpressionCached(declaration.initializer)) & 2048 /* Undefined */)) {
+                type = getTypeWithFacts(type, 131072 /* NEUndefined */);
+            }
+            return declaration.initializer ?
+                getUnionType([type, checkExpressionCached(declaration.initializer)], /*subtypeReduction*/ true) :
+                type;
         }
-        function bindFunctionOrConstructorType(node) {
-            // For a given function symbol "<...>(...) => T" we want to generate a symbol identical
-            // to the one we would get for: { <...>(...): T }
-            //
-            // We do that by making an anonymous type literal symbol, and then setting the function
-            // symbol as its sole member. To the rest of the system, this symbol will be  indistinguishable
-            // from an actual type literal symbol you would have gotten had you used the long form.
-            var symbol = createSymbol(131072 /* Signature */, getDeclarationName(node));
-            addDeclarationToSymbol(symbol, node, 131072 /* Signature */);
-            var typeLiteralSymbol = createSymbol(2048 /* TypeLiteral */, "__type");
-            addDeclarationToSymbol(typeLiteralSymbol, node, 2048 /* TypeLiteral */);
-            typeLiteralSymbol.members = ts.createMap();
-            typeLiteralSymbol.members[symbol.name] = symbol;
+        function getTypeForDeclarationFromJSDocComment(declaration) {
+            var jsdocType = ts.getJSDocType(declaration);
+            if (jsdocType) {
+                return getTypeFromTypeNode(jsdocType);
+            }
+            return undefined;
         }
-        function bindObjectLiteralExpression(node) {
-            var ElementKind;
-            (function (ElementKind) {
-                ElementKind[ElementKind["Property"] = 1] = "Property";
-                ElementKind[ElementKind["Accessor"] = 2] = "Accessor";
-            })(ElementKind || (ElementKind = {}));
-            if (inStrictMode) {
-                var seen = ts.createMap();
-                for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
-                    var prop = _a[_i];
-                    if (prop.name.kind !== 69 /* Identifier */) {
-                        continue;
-                    }
-                    var identifier = prop.name;
-                    // ECMA-262 11.1.5 Object Initializer
-                    // If previous is not undefined then throw a SyntaxError exception if any of the following conditions are true
-                    // a.This production is contained in strict code and IsDataDescriptor(previous) is true and
-                    // IsDataDescriptor(propId.descriptor) is true.
-                    //    b.IsDataDescriptor(previous) is true and IsAccessorDescriptor(propId.descriptor) is true.
-                    //    c.IsAccessorDescriptor(previous) is true and IsDataDescriptor(propId.descriptor) is true.
-                    //    d.IsAccessorDescriptor(previous) is true and IsAccessorDescriptor(propId.descriptor) is true
-                    // and either both previous and propId.descriptor have[[Get]] fields or both previous and propId.descriptor have[[Set]] fields
-                    var currentKind = prop.kind === 253 /* PropertyAssignment */ || prop.kind === 254 /* ShorthandPropertyAssignment */ || prop.kind === 147 /* MethodDeclaration */
-                        ? 1 /* Property */
-                        : 2 /* Accessor */;
-                    var existingKind = seen[identifier.text];
-                    if (!existingKind) {
-                        seen[identifier.text] = currentKind;
-                        continue;
-                    }
-                    if (currentKind === 1 /* Property */ && existingKind === 1 /* Property */) {
-                        var span_1 = ts.getErrorSpanForNode(file, identifier);
-                        file.bindDiagnostics.push(ts.createFileDiagnostic(file, span_1.start, span_1.length, ts.Diagnostics.An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode));
+        function isNullOrUndefined(node) {
+            var expr = ts.skipParentheses(node);
+            return expr.kind === 95 /* NullKeyword */ || expr.kind === 71 /* Identifier */ && getResolvedSymbol(expr) === undefinedSymbol;
+        }
+        function isEmptyArrayLiteral(node) {
+            var expr = ts.skipParentheses(node);
+            return expr.kind === 177 /* ArrayLiteralExpression */ && expr.elements.length === 0;
+        }
+        function addOptionality(type, optional) {
+            return strictNullChecks && optional ? getNullableType(type, 2048 /* Undefined */) : type;
+        }
+        // Return the inferred type for a variable, parameter, or property declaration
+        function getTypeForVariableLikeDeclaration(declaration, includeOptionality) {
+            // A variable declared in a for..in statement is of type string, or of type keyof T when the
+            // right hand expression is of a type parameter type.
+            if (declaration.parent.parent.kind === 215 /* ForInStatement */) {
+                var indexType = getIndexType(checkNonNullExpression(declaration.parent.parent.expression));
+                return indexType.flags & (16384 /* TypeParameter */ | 262144 /* Index */) ? indexType : stringType;
+            }
+            if (declaration.parent.parent.kind === 216 /* ForOfStatement */) {
+                // checkRightHandSideOfForOf will return undefined if the for-of expression type was
+                // missing properties/signatures required to get its iteratedType (like
+                // [Symbol.iterator] or next). This may be because we accessed properties from anyType,
+                // or it may have led to an error inside getElementTypeOfIterable.
+                var forOfStatement = declaration.parent.parent;
+                return checkRightHandSideOfForOf(forOfStatement.expression, forOfStatement.awaitModifier) || anyType;
+            }
+            if (ts.isBindingPattern(declaration.parent)) {
+                return getTypeForBindingElement(declaration);
+            }
+            // Use type from type annotation if one is present
+            var typeNode = ts.getEffectiveTypeAnnotationNode(declaration);
+            if (typeNode) {
+                var declaredType = getTypeFromTypeNode(typeNode);
+                return addOptionality(declaredType, /*optional*/ declaration.questionToken && includeOptionality);
+            }
+            if ((noImplicitAny || declaration.flags & 65536 /* JavaScriptFile */) &&
+                declaration.kind === 226 /* VariableDeclaration */ && !ts.isBindingPattern(declaration.name) &&
+                !(ts.getCombinedModifierFlags(declaration) & 1 /* Export */) && !ts.isInAmbientContext(declaration)) {
+                // If --noImplicitAny is on or the declaration is in a Javascript file,
+                // use control flow tracked 'any' type for non-ambient, non-exported var or let variables with no
+                // initializer or a 'null' or 'undefined' initializer.
+                if (!(ts.getCombinedNodeFlags(declaration) & 2 /* Const */) && (!declaration.initializer || isNullOrUndefined(declaration.initializer))) {
+                    return autoType;
+                }
+                // Use control flow tracked 'any[]' type for non-ambient, non-exported variables with an empty array
+                // literal initializer.
+                if (declaration.initializer && isEmptyArrayLiteral(declaration.initializer)) {
+                    return autoArrayType;
+                }
+            }
+            if (declaration.kind === 146 /* Parameter */) {
+                var func = declaration.parent;
+                // For a parameter of a set accessor, use the type of the get accessor if one is present
+                if (func.kind === 154 /* SetAccessor */ && !ts.hasDynamicName(func)) {
+                    var getter = ts.getDeclarationOfKind(declaration.parent.symbol, 153 /* GetAccessor */);
+                    if (getter) {
+                        var getterSignature = getSignatureFromDeclaration(getter);
+                        var thisParameter = getAccessorThisParameter(func);
+                        if (thisParameter && declaration === thisParameter) {
+                            // Use the type from the *getter*
+                            ts.Debug.assert(!thisParameter.type);
+                            return getTypeOfSymbol(getterSignature.thisParameter);
+                        }
+                        return getReturnTypeOfSignature(getterSignature);
                     }
                 }
+                // Use contextual parameter type if one is available
+                var type = void 0;
+                if (declaration.symbol.name === "this") {
+                    type = getContextualThisParameterType(func);
+                }
+                else {
+                    type = getContextuallyTypedParameterType(declaration);
+                }
+                if (type) {
+                    return addOptionality(type, /*optional*/ declaration.questionToken && includeOptionality);
+                }
             }
-            return bindAnonymousDeclaration(node, 4096 /* ObjectLiteral */, "__object");
-        }
-        function bindAnonymousDeclaration(node, symbolFlags, name) {
-            var symbol = createSymbol(symbolFlags, name);
-            addDeclarationToSymbol(symbol, node, symbolFlags);
+            // Use the type of the initializer expression if one is present
+            if (declaration.initializer) {
+                var type = checkDeclarationInitializer(declaration);
+                return addOptionality(type, /*optional*/ declaration.questionToken && includeOptionality);
+            }
+            if (ts.isJsxAttribute(declaration)) {
+                // if JSX attribute doesn't have initializer, by default the attribute will have boolean value of true.
+                // I.e <Elem attr /> is sugar for <Elem attr={true} />
+                return trueType;
+            }
+            // If it is a short-hand property assignment, use the type of the identifier
+            if (declaration.kind === 262 /* ShorthandPropertyAssignment */) {
+                return checkIdentifier(declaration.name);
+            }
+            // If the declaration specifies a binding pattern, use the type implied by the binding pattern
+            if (ts.isBindingPattern(declaration.name)) {
+                return getTypeFromBindingPattern(declaration.name, /*includePatternInType*/ false, /*reportErrors*/ true);
+            }
+            // No type specified and nothing can be inferred
+            return undefined;
         }
-        function bindBlockScopedDeclaration(node, symbolFlags, symbolExcludes) {
-            switch (blockScopeContainer.kind) {
-                case 225 /* ModuleDeclaration */:
-                    declareModuleMember(node, symbolFlags, symbolExcludes);
-                    break;
-                case 256 /* SourceFile */:
-                    if (ts.isExternalModule(container)) {
-                        declareModuleMember(node, symbolFlags, symbolExcludes);
-                        break;
+        function getWidenedTypeFromJSSpecialPropertyDeclarations(symbol) {
+            var types = [];
+            var definedInConstructor = false;
+            var definedInMethod = false;
+            var jsDocType;
+            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                var declaration = _a[_i];
+                var expression = declaration.kind === 194 /* BinaryExpression */ ? declaration :
+                    declaration.kind === 179 /* PropertyAccessExpression */ ? ts.getAncestor(declaration, 194 /* BinaryExpression */) :
+                        undefined;
+                if (!expression) {
+                    return unknownType;
+                }
+                if (ts.isPropertyAccessExpression(expression.left) && expression.left.expression.kind === 99 /* ThisKeyword */) {
+                    if (ts.getThisContainer(expression, /*includeArrowFunctions*/ false).kind === 152 /* Constructor */) {
+                        definedInConstructor = true;
                     }
-                // fall through.
-                default:
-                    if (!blockScopeContainer.locals) {
-                        blockScopeContainer.locals = ts.createMap();
-                        addToContainerChain(blockScopeContainer);
+                    else {
+                        definedInMethod = true;
+                    }
+                }
+                // If there is a JSDoc type, use it
+                var type_1 = getTypeForDeclarationFromJSDocComment(expression.parent);
+                if (type_1) {
+                    var declarationType = getWidenedType(type_1);
+                    if (!jsDocType) {
+                        jsDocType = declarationType;
                     }
-                    declareSymbol(blockScopeContainer.locals, undefined, node, symbolFlags, symbolExcludes);
+                    else if (jsDocType !== unknownType && declarationType !== unknownType && !isTypeIdenticalTo(jsDocType, declarationType)) {
+                        var name_18 = ts.getNameOfDeclaration(declaration);
+                        error(name_18, ts.Diagnostics.Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_type_2, ts.declarationNameToString(name_18), typeToString(jsDocType), typeToString(declarationType));
+                    }
+                }
+                else if (!jsDocType) {
+                    // If we don't have an explicit JSDoc type, get the type from the expression.
+                    types.push(getWidenedLiteralType(checkExpressionCached(expression.right)));
+                }
             }
+            var type = jsDocType || getUnionType(types, /*subtypeReduction*/ true);
+            return getWidenedType(addOptionality(type, definedInMethod && !definedInConstructor));
         }
-        function bindBlockScopedVariableDeclaration(node) {
-            bindBlockScopedDeclaration(node, 2 /* BlockScopedVariable */, 107455 /* BlockScopedVariableExcludes */);
+        // Return the type implied by a binding pattern element. This is the type of the initializer of the element if
+        // one is present. Otherwise, if the element is itself a binding pattern, it is the type implied by the binding
+        // pattern. Otherwise, it is the type any.
+        function getTypeFromBindingElement(element, includePatternInType, reportErrors) {
+            if (element.initializer) {
+                return checkDeclarationInitializer(element);
+            }
+            if (ts.isBindingPattern(element.name)) {
+                return getTypeFromBindingPattern(element.name, includePatternInType, reportErrors);
+            }
+            if (reportErrors && noImplicitAny && !declarationBelongsToPrivateAmbientMember(element)) {
+                reportImplicitAnyError(element, anyType);
+            }
+            return anyType;
         }
-        // The binder visits every node in the syntax tree so it is a convenient place to perform a single localized
-        // check for reserved words used as identifiers in strict mode code.
-        function checkStrictModeIdentifier(node) {
-            if (inStrictMode &&
-                node.originalKeywordKind >= 106 /* FirstFutureReservedWord */ &&
-                node.originalKeywordKind <= 114 /* LastFutureReservedWord */ &&
-                !ts.isIdentifierName(node) &&
-                !ts.isInAmbientContext(node)) {
-                // Report error only if there are no parse errors in file
-                if (!file.parseDiagnostics.length) {
-                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node, getStrictModeIdentifierMessage(node), ts.declarationNameToString(node)));
+        // Return the type implied by an object binding pattern
+        function getTypeFromObjectBindingPattern(pattern, includePatternInType, reportErrors) {
+            var members = ts.createMap();
+            var stringIndexInfo;
+            var hasComputedProperties = false;
+            ts.forEach(pattern.elements, function (e) {
+                var name = e.propertyName || e.name;
+                if (isComputedNonLiteralName(name)) {
+                    // do not include computed properties in the implied type
+                    hasComputedProperties = true;
+                    return;
+                }
+                if (e.dotDotDotToken) {
+                    stringIndexInfo = createIndexInfo(anyType, /*isReadonly*/ false);
+                    return;
                 }
+                var text = ts.getTextOfPropertyName(name);
+                var flags = 4 /* Property */ | (e.initializer ? 67108864 /* Optional */ : 0);
+                var symbol = createSymbol(flags, text);
+                symbol.type = getTypeFromBindingElement(e, includePatternInType, reportErrors);
+                symbol.bindingElement = e;
+                members.set(symbol.name, symbol);
+            });
+            var result = createAnonymousType(undefined, members, emptyArray, emptyArray, stringIndexInfo, undefined);
+            if (includePatternInType) {
+                result.pattern = pattern;
+            }
+            if (hasComputedProperties) {
+                result.objectFlags |= 512 /* ObjectLiteralPatternWithComputedProperties */;
             }
+            return result;
         }
-        function getStrictModeIdentifierMessage(node) {
-            // Provide specialized messages to help the user understand why we think they're in
-            // strict mode.
-            if (ts.getContainingClass(node)) {
-                return ts.Diagnostics.Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_strict_mode;
+        // Return the type implied by an array binding pattern
+        function getTypeFromArrayBindingPattern(pattern, includePatternInType, reportErrors) {
+            var elements = pattern.elements;
+            var lastElement = ts.lastOrUndefined(elements);
+            if (elements.length === 0 || (!ts.isOmittedExpression(lastElement) && lastElement.dotDotDotToken)) {
+                return languageVersion >= 2 /* ES2015 */ ? createIterableType(anyType) : anyArrayType;
             }
-            if (file.externalModuleIndicator) {
-                return ts.Diagnostics.Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode;
+            // If the pattern has at least one element, and no rest element, then it should imply a tuple type.
+            var elementTypes = ts.map(elements, function (e) { return ts.isOmittedExpression(e) ? anyType : getTypeFromBindingElement(e, includePatternInType, reportErrors); });
+            var result = createTupleType(elementTypes);
+            if (includePatternInType) {
+                result = cloneTypeReference(result);
+                result.pattern = pattern;
             }
-            return ts.Diagnostics.Identifier_expected_0_is_a_reserved_word_in_strict_mode;
+            return result;
         }
-        function checkStrictModeBinaryExpression(node) {
-            if (inStrictMode && ts.isLeftHandSideExpression(node.left) && ts.isAssignmentOperator(node.operatorToken.kind)) {
-                // ECMA 262 (Annex C) The identifier eval or arguments may not appear as the LeftHandSideExpression of an
-                // Assignment operator(11.13) or of a PostfixExpression(11.3)
-                checkStrictModeEvalOrArguments(node, node.left);
-            }
+        // Return the type implied by a binding pattern. This is the type implied purely by the binding pattern itself
+        // and without regard to its context (i.e. without regard any type annotation or initializer associated with the
+        // declaration in which the binding pattern is contained). For example, the implied type of [x, y] is [any, any]
+        // and the implied type of { x, y: z = 1 } is { x: any; y: number; }. The type implied by a binding pattern is
+        // used as the contextual type of an initializer associated with the binding pattern. Also, for a destructuring
+        // parameter with no type annotation or initializer, the type implied by the binding pattern becomes the type of
+        // the parameter.
+        function getTypeFromBindingPattern(pattern, includePatternInType, reportErrors) {
+            return pattern.kind === 174 /* ObjectBindingPattern */
+                ? getTypeFromObjectBindingPattern(pattern, includePatternInType, reportErrors)
+                : getTypeFromArrayBindingPattern(pattern, includePatternInType, reportErrors);
         }
-        function checkStrictModeCatchClause(node) {
-            // It is a SyntaxError if a TryStatement with a Catch occurs within strict code and the Identifier of the
-            // Catch production is eval or arguments
-            if (inStrictMode && node.variableDeclaration) {
-                checkStrictModeEvalOrArguments(node, node.variableDeclaration.name);
+        // Return the type associated with a variable, parameter, or property declaration. In the simple case this is the type
+        // specified in a type annotation or inferred from an initializer. However, in the case of a destructuring declaration it
+        // is a bit more involved. For example:
+        //
+        //   var [x, s = ""] = [1, "one"];
+        //
+        // Here, the array literal [1, "one"] is contextually typed by the type [any, string], which is the implied type of the
+        // binding pattern [x, s = ""]. Because the contextual type is a tuple type, the resulting type of [1, "one"] is the
+        // tuple type [number, string]. Thus, the type inferred for 'x' is number and the type inferred for 's' is string.
+        function getWidenedTypeForVariableLikeDeclaration(declaration, reportErrors) {
+            var type = getTypeForVariableLikeDeclaration(declaration, /*includeOptionality*/ true);
+            if (type) {
+                if (reportErrors) {
+                    reportErrorsFromWidening(declaration, type);
+                }
+                // During a normal type check we'll never get to here with a property assignment (the check of the containing
+                // object literal uses a different path). We exclude widening only so that language services and type verification
+                // tools see the actual type.
+                if (declaration.kind === 261 /* PropertyAssignment */) {
+                    return type;
+                }
+                return getWidenedType(type);
             }
-        }
-        function checkStrictModeDeleteExpression(node) {
-            // Grammar checking
-            if (inStrictMode && node.expression.kind === 69 /* Identifier */) {
-                // When a delete operator occurs within strict mode code, a SyntaxError is thrown if its
-                // UnaryExpression is a direct reference to a variable, function argument, or function name
-                var span_2 = ts.getErrorSpanForNode(file, node.expression);
-                file.bindDiagnostics.push(ts.createFileDiagnostic(file, span_2.start, span_2.length, ts.Diagnostics.delete_cannot_be_called_on_an_identifier_in_strict_mode));
+            // Rest parameters default to type any[], other parameters default to type any
+            type = declaration.dotDotDotToken ? anyArrayType : anyType;
+            // Report implicit any errors unless this is a private property within an ambient declaration
+            if (reportErrors && noImplicitAny) {
+                if (!declarationBelongsToPrivateAmbientMember(declaration)) {
+                    reportImplicitAnyError(declaration, type);
+                }
             }
+            return type;
         }
-        function isEvalOrArgumentsIdentifier(node) {
-            return node.kind === 69 /* Identifier */ &&
-                (node.text === "eval" || node.text === "arguments");
+        function declarationBelongsToPrivateAmbientMember(declaration) {
+            var root = ts.getRootDeclaration(declaration);
+            var memberDeclaration = root.kind === 146 /* Parameter */ ? root.parent : root;
+            return isPrivateWithinAmbient(memberDeclaration);
         }
-        function checkStrictModeEvalOrArguments(contextNode, name) {
-            if (name && name.kind === 69 /* Identifier */) {
-                var identifier = name;
-                if (isEvalOrArgumentsIdentifier(identifier)) {
-                    // We check first if the name is inside class declaration or class expression; if so give explicit message
-                    // otherwise report generic error message.
-                    var span_3 = ts.getErrorSpanForNode(file, name);
-                    file.bindDiagnostics.push(ts.createFileDiagnostic(file, span_3.start, span_3.length, getStrictModeEvalOrArgumentsMessage(contextNode), identifier.text));
+        function getTypeOfVariableOrParameterOrProperty(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.type) {
+                // Handle prototype property
+                if (symbol.flags & 16777216 /* Prototype */) {
+                    return links.type = getTypeOfPrototypeProperty(symbol);
+                }
+                // Handle catch clause variables
+                var declaration = symbol.valueDeclaration;
+                if (ts.isCatchClauseVariableDeclarationOrBindingElement(declaration)) {
+                    return links.type = anyType;
+                }
+                // Handle export default expressions
+                if (declaration.kind === 243 /* ExportAssignment */) {
+                    return links.type = checkExpression(declaration.expression);
+                }
+                if (declaration.flags & 65536 /* JavaScriptFile */ && declaration.kind === 292 /* JSDocPropertyTag */ && declaration.typeExpression) {
+                    return links.type = getTypeFromTypeNode(declaration.typeExpression.type);
+                }
+                // Handle variable, parameter or property
+                if (!pushTypeResolution(symbol, 0 /* Type */)) {
+                    return unknownType;
+                }
+                var type = void 0;
+                // Handle certain special assignment kinds, which happen to union across multiple declarations:
+                // * module.exports = expr
+                // * exports.p = expr
+                // * this.p = expr
+                // * className.prototype.method = expr
+                if (declaration.kind === 194 /* BinaryExpression */ ||
+                    declaration.kind === 179 /* PropertyAccessExpression */ && declaration.parent.kind === 194 /* BinaryExpression */) {
+                    type = getWidenedTypeFromJSSpecialPropertyDeclarations(symbol);
+                }
+                else {
+                    type = getWidenedTypeForVariableLikeDeclaration(declaration, /*reportErrors*/ true);
+                }
+                if (!popTypeResolution()) {
+                    type = reportCircularityError(symbol);
                 }
+                links.type = type;
             }
+            return links.type;
         }
-        function getStrictModeEvalOrArgumentsMessage(node) {
-            // Provide specialized messages to help the user understand why we think they're in
-            // strict mode.
-            if (ts.getContainingClass(node)) {
-                return ts.Diagnostics.Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode;
+        function getAnnotatedAccessorType(accessor) {
+            if (accessor) {
+                if (accessor.kind === 153 /* GetAccessor */) {
+                    var getterTypeAnnotation = ts.getEffectiveReturnTypeNode(accessor);
+                    return getterTypeAnnotation && getTypeFromTypeNode(getterTypeAnnotation);
+                }
+                else {
+                    var setterTypeAnnotation = ts.getEffectiveSetAccessorTypeAnnotationNode(accessor);
+                    return setterTypeAnnotation && getTypeFromTypeNode(setterTypeAnnotation);
+                }
             }
-            if (file.externalModuleIndicator) {
-                return ts.Diagnostics.Invalid_use_of_0_Modules_are_automatically_in_strict_mode;
+            return undefined;
+        }
+        function getAnnotatedAccessorThisParameter(accessor) {
+            var parameter = getAccessorThisParameter(accessor);
+            return parameter && parameter.symbol;
+        }
+        function getThisTypeOfDeclaration(declaration) {
+            return getThisTypeOfSignature(getSignatureFromDeclaration(declaration));
+        }
+        function getTypeOfAccessors(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.type) {
+                var getter = ts.getDeclarationOfKind(symbol, 153 /* GetAccessor */);
+                var setter = ts.getDeclarationOfKind(symbol, 154 /* SetAccessor */);
+                if (getter && getter.flags & 65536 /* JavaScriptFile */) {
+                    var jsDocType = getTypeForDeclarationFromJSDocComment(getter);
+                    if (jsDocType) {
+                        return links.type = jsDocType;
+                    }
+                }
+                if (!pushTypeResolution(symbol, 0 /* Type */)) {
+                    return unknownType;
+                }
+                var type = void 0;
+                // First try to see if the user specified a return type on the get-accessor.
+                var getterReturnType = getAnnotatedAccessorType(getter);
+                if (getterReturnType) {
+                    type = getterReturnType;
+                }
+                else {
+                    // If the user didn't specify a return type, try to use the set-accessor's parameter type.
+                    var setterParameterType = getAnnotatedAccessorType(setter);
+                    if (setterParameterType) {
+                        type = setterParameterType;
+                    }
+                    else {
+                        // If there are no specified types, try to infer it from the body of the get accessor if it exists.
+                        if (getter && getter.body) {
+                            type = getReturnTypeFromBody(getter);
+                        }
+                        else {
+                            if (noImplicitAny) {
+                                if (setter) {
+                                    error(setter, ts.Diagnostics.Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_parameter_type_annotation, symbolToString(symbol));
+                                }
+                                else {
+                                    ts.Debug.assert(!!getter, "there must existed getter as we are current checking either setter or getter in this function");
+                                    error(getter, ts.Diagnostics.Property_0_implicitly_has_type_any_because_its_get_accessor_lacks_a_return_type_annotation, symbolToString(symbol));
+                                }
+                            }
+                            type = anyType;
+                        }
+                    }
+                }
+                if (!popTypeResolution()) {
+                    type = anyType;
+                    if (noImplicitAny) {
+                        var getter_1 = ts.getDeclarationOfKind(symbol, 153 /* GetAccessor */);
+                        error(getter_1, ts.Diagnostics._0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions, symbolToString(symbol));
+                    }
+                }
+                links.type = type;
             }
-            return ts.Diagnostics.Invalid_use_of_0_in_strict_mode;
+            return links.type;
         }
-        function checkStrictModeFunctionName(node) {
-            if (inStrictMode) {
-                // It is a SyntaxError if the identifier eval or arguments appears within a FormalParameterList of a strict mode FunctionDeclaration or FunctionExpression (13.1))
-                checkStrictModeEvalOrArguments(node, node.name);
+        function getBaseTypeVariableOfClass(symbol) {
+            var baseConstructorType = getBaseConstructorTypeOfClass(getDeclaredTypeOfClassOrInterface(symbol));
+            return baseConstructorType.flags & 540672 /* TypeVariable */ ? baseConstructorType : undefined;
+        }
+        function getTypeOfFuncClassEnumModule(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.type) {
+                if (symbol.flags & 1536 /* Module */ && ts.isShorthandAmbientModuleSymbol(symbol)) {
+                    links.type = anyType;
+                }
+                else {
+                    var type = createObjectType(16 /* Anonymous */, symbol);
+                    if (symbol.flags & 32 /* Class */) {
+                        var baseTypeVariable = getBaseTypeVariableOfClass(symbol);
+                        links.type = baseTypeVariable ? getIntersectionType([type, baseTypeVariable]) : type;
+                    }
+                    else {
+                        links.type = strictNullChecks && symbol.flags & 67108864 /* Optional */ ? getNullableType(type, 2048 /* Undefined */) : type;
+                    }
+                }
             }
+            return links.type;
         }
-        function getStrictModeBlockScopeFunctionDeclarationMessage(node) {
-            // Provide specialized messages to help the user understand why we think they're in
-            // strict mode.
-            if (ts.getContainingClass(node)) {
-                return ts.Diagnostics.Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Class_definitions_are_automatically_in_strict_mode;
+        function getTypeOfEnumMember(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.type) {
+                links.type = getDeclaredTypeOfEnumMember(symbol);
             }
-            if (file.externalModuleIndicator) {
-                return ts.Diagnostics.Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_are_automatically_in_strict_mode;
+            return links.type;
+        }
+        function getTypeOfAlias(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.type) {
+                var targetSymbol = resolveAlias(symbol);
+                // It only makes sense to get the type of a value symbol. If the result of resolving
+                // the alias is not a value, then it has no type. To get the type associated with a
+                // type symbol, call getDeclaredTypeOfSymbol.
+                // This check is important because without it, a call to getTypeOfSymbol could end
+                // up recursively calling getTypeOfAlias, causing a stack overflow.
+                links.type = targetSymbol.flags & 107455 /* Value */
+                    ? getTypeOfSymbol(targetSymbol)
+                    : unknownType;
             }
-            return ts.Diagnostics.Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5;
+            return links.type;
         }
-        function checkStrictModeFunctionDeclaration(node) {
-            if (languageVersion < 2 /* ES6 */) {
-                // Report error if function is not top level function declaration
-                if (blockScopeContainer.kind !== 256 /* SourceFile */ &&
-                    blockScopeContainer.kind !== 225 /* ModuleDeclaration */ &&
-                    !ts.isFunctionLike(blockScopeContainer)) {
-                    // We check first if the name is inside class declaration or class expression; if so give explicit message
-                    // otherwise report generic error message.
-                    var errorSpan = ts.getErrorSpanForNode(file, node);
-                    file.bindDiagnostics.push(ts.createFileDiagnostic(file, errorSpan.start, errorSpan.length, getStrictModeBlockScopeFunctionDeclarationMessage(node)));
+        function getTypeOfInstantiatedSymbol(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.type) {
+                if (symbolInstantiationDepth === 100) {
+                    error(symbol.valueDeclaration, ts.Diagnostics.Generic_type_instantiation_is_excessively_deep_and_possibly_infinite);
+                    links.type = unknownType;
+                }
+                else {
+                    if (!pushTypeResolution(symbol, 0 /* Type */)) {
+                        return unknownType;
+                    }
+                    symbolInstantiationDepth++;
+                    var type = instantiateType(getTypeOfSymbol(links.target), links.mapper);
+                    symbolInstantiationDepth--;
+                    if (!popTypeResolution()) {
+                        type = reportCircularityError(symbol);
+                    }
+                    links.type = type;
                 }
             }
+            return links.type;
         }
-        function checkStrictModeNumericLiteral(node) {
-            if (inStrictMode && node.isOctalLiteral) {
-                file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Octal_literals_are_not_allowed_in_strict_mode));
+        function reportCircularityError(symbol) {
+            // Check if variable has type annotation that circularly references the variable itself
+            if (ts.getEffectiveTypeAnnotationNode(symbol.valueDeclaration)) {
+                error(symbol.valueDeclaration, ts.Diagnostics._0_is_referenced_directly_or_indirectly_in_its_own_type_annotation, symbolToString(symbol));
+                return unknownType;
             }
-        }
-        function checkStrictModePostfixUnaryExpression(node) {
-            // Grammar checking
-            // The identifier eval or arguments may not appear as the LeftHandSideExpression of an
-            // Assignment operator(11.13) or of a PostfixExpression(11.3) or as the UnaryExpression
-            // operated upon by a Prefix Increment(11.4.4) or a Prefix Decrement(11.4.5) operator.
-            if (inStrictMode) {
-                checkStrictModeEvalOrArguments(node, node.operand);
+            // Otherwise variable has initializer that circularly references the variable itself
+            if (noImplicitAny) {
+                error(symbol.valueDeclaration, ts.Diagnostics._0_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_and_is_referenced_directly_or_indirectly_in_its_own_initializer, symbolToString(symbol));
             }
+            return anyType;
         }
-        function checkStrictModePrefixUnaryExpression(node) {
-            // Grammar checking
-            if (inStrictMode) {
-                if (node.operator === 41 /* PlusPlusToken */ || node.operator === 42 /* MinusMinusToken */) {
-                    checkStrictModeEvalOrArguments(node, node.operand);
-                }
+        function getTypeOfSymbol(symbol) {
+            if (ts.getCheckFlags(symbol) & 1 /* Instantiated */) {
+                return getTypeOfInstantiatedSymbol(symbol);
             }
-        }
-        function checkStrictModeWithStatement(node) {
-            // Grammar checking for withStatement
-            if (inStrictMode) {
-                errorOnFirstToken(node, ts.Diagnostics.with_statements_are_not_allowed_in_strict_mode);
+            if (symbol.flags & (3 /* Variable */ | 4 /* Property */)) {
+                return getTypeOfVariableOrParameterOrProperty(symbol);
+            }
+            if (symbol.flags & (16 /* Function */ | 8192 /* Method */ | 32 /* Class */ | 384 /* Enum */ | 512 /* ValueModule */)) {
+                return getTypeOfFuncClassEnumModule(symbol);
+            }
+            if (symbol.flags & 8 /* EnumMember */) {
+                return getTypeOfEnumMember(symbol);
+            }
+            if (symbol.flags & 98304 /* Accessor */) {
+                return getTypeOfAccessors(symbol);
+            }
+            if (symbol.flags & 8388608 /* Alias */) {
+                return getTypeOfAlias(symbol);
             }
+            return unknownType;
         }
-        function errorOnFirstToken(node, message, arg0, arg1, arg2) {
-            var span = ts.getSpanOfTokenAtPosition(file, node.pos);
-            file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, message, arg0, arg1, arg2));
+        function isReferenceToType(type, target) {
+            return type !== undefined
+                && target !== undefined
+                && (getObjectFlags(type) & 4 /* Reference */) !== 0
+                && type.target === target;
         }
-        function getDestructuringParameterName(node) {
-            return "__" + ts.indexOf(node.parent.parameters, node);
+        function getTargetType(type) {
+            return getObjectFlags(type) & 4 /* Reference */ ? type.target : type;
         }
-        function bind(node) {
-            if (!node) {
-                return;
-            }
-            node.parent = parent;
-            var saveInStrictMode = inStrictMode;
-            // First we bind declaration nodes to a symbol if possible. We'll both create a symbol
-            // and then potentially add the symbol to an appropriate symbol table. Possible
-            // destination symbol tables are:
-            //
-            //  1) The 'exports' table of the current container's symbol.
-            //  2) The 'members' table of the current container's symbol.
-            //  3) The 'locals' table of the current container.
-            //
-            // However, not all symbols will end up in any of these tables. 'Anonymous' symbols
-            // (like TypeLiterals for example) will not be put in any table.
-            bindWorker(node);
-            // Then we recurse into the children of the node to bind them as well. For certain
-            // symbols we do specialized work when we recurse. For example, we'll keep track of
-            // the current 'container' node when it changes. This helps us know which symbol table
-            // a local should go into for example. Since terminal nodes are known not to have
-            // children, as an optimization we don't process those.
-            if (node.kind > 138 /* LastToken */) {
-                var saveParent = parent;
-                parent = node;
-                var containerFlags = getContainerFlags(node);
-                if (containerFlags === 0 /* None */) {
-                    bindChildren(node);
+        function hasBaseType(type, checkBase) {
+            return check(type);
+            function check(type) {
+                if (getObjectFlags(type) & (3 /* ClassOrInterface */ | 4 /* Reference */)) {
+                    var target = getTargetType(type);
+                    return target === checkBase || ts.forEach(getBaseTypes(target), check);
                 }
-                else {
-                    bindContainer(node, containerFlags);
+                else if (type.flags & 131072 /* Intersection */) {
+                    return ts.forEach(type.types, check);
                 }
-                parent = saveParent;
             }
-            else if (!skipTransformFlagAggregation && (node.transformFlags & 536870912 /* HasComputedFlags */) === 0) {
-                subtreeTransformFlags |= computeTransformFlagsForNode(node, 0);
+        }
+        // Appends the type parameters given by a list of declarations to a set of type parameters and returns the resulting set.
+        // The function allocates a new array if the input type parameter set is undefined, but otherwise it modifies the set
+        // in-place and returns the same array.
+        function appendTypeParameters(typeParameters, declarations) {
+            for (var _i = 0, declarations_3 = declarations; _i < declarations_3.length; _i++) {
+                var declaration = declarations_3[_i];
+                var tp = getDeclaredTypeOfTypeParameter(getSymbolOfNode(declaration));
+                if (!typeParameters) {
+                    typeParameters = [tp];
+                }
+                else if (!ts.contains(typeParameters, tp)) {
+                    typeParameters.push(tp);
+                }
             }
-            inStrictMode = saveInStrictMode;
+            return typeParameters;
         }
-        function updateStrictModeStatementList(statements) {
-            if (!inStrictMode) {
-                for (var _i = 0, statements_1 = statements; _i < statements_1.length; _i++) {
-                    var statement = statements_1[_i];
-                    if (!ts.isPrologueDirective(statement)) {
-                        return;
-                    }
-                    if (isUseStrictPrologueDirective(statement)) {
-                        inStrictMode = true;
-                        return;
+        // Appends the outer type parameters of a node to a set of type parameters and returns the resulting set. The function
+        // allocates a new array if the input type parameter set is undefined, but otherwise it modifies the set in-place and
+        // returns the same array.
+        function appendOuterTypeParameters(typeParameters, node) {
+            while (true) {
+                node = node.parent;
+                if (!node) {
+                    return typeParameters;
+                }
+                if (node.kind === 229 /* ClassDeclaration */ || node.kind === 199 /* ClassExpression */ ||
+                    node.kind === 228 /* FunctionDeclaration */ || node.kind === 186 /* FunctionExpression */ ||
+                    node.kind === 151 /* MethodDeclaration */ || node.kind === 187 /* ArrowFunction */) {
+                    var declarations = node.typeParameters;
+                    if (declarations) {
+                        return appendTypeParameters(appendOuterTypeParameters(typeParameters, node), declarations);
                     }
                 }
             }
         }
-        /// Should be called only on prologue directives (isPrologueDirective(node) should be true)
-        function isUseStrictPrologueDirective(node) {
-            var nodeText = ts.getTextOfNodeFromSourceText(file.text, node.expression);
-            // Note: the node text must be exactly "use strict" or 'use strict'.  It is not ok for the
-            // string to contain unicode escapes (as per ES5).
-            return nodeText === '"use strict"' || nodeText === "'use strict'";
+        // The outer type parameters are those defined by enclosing generic classes, methods, or functions.
+        function getOuterTypeParametersOfClassOrInterface(symbol) {
+            var declaration = symbol.flags & 32 /* Class */ ? symbol.valueDeclaration : ts.getDeclarationOfKind(symbol, 230 /* InterfaceDeclaration */);
+            return appendOuterTypeParameters(/*typeParameters*/ undefined, declaration);
         }
-        function bindWorker(node) {
-            switch (node.kind) {
-                /* Strict mode checks */
-                case 69 /* Identifier */:
-                case 97 /* ThisKeyword */:
-                    if (currentFlow && (ts.isExpression(node) || parent.kind === 254 /* ShorthandPropertyAssignment */)) {
-                        node.flowNode = currentFlow;
-                    }
-                    return checkStrictModeIdentifier(node);
-                case 172 /* PropertyAccessExpression */:
-                    if (currentFlow && isNarrowableReference(node)) {
-                        node.flowNode = currentFlow;
-                    }
-                    break;
-                case 187 /* BinaryExpression */:
-                    if (ts.isInJavaScriptFile(node)) {
-                        var specialKind = ts.getSpecialPropertyAssignmentKind(node);
-                        switch (specialKind) {
-                            case 1 /* ExportsProperty */:
-                                bindExportsPropertyAssignment(node);
-                                break;
-                            case 2 /* ModuleExports */:
-                                bindModuleExportsAssignment(node);
-                                break;
-                            case 3 /* PrototypeProperty */:
-                                bindPrototypePropertyAssignment(node);
-                                break;
-                            case 4 /* ThisProperty */:
-                                bindThisPropertyAssignment(node);
-                                break;
-                            case 0 /* None */:
-                                // Nothing to do
-                                break;
-                            default:
-                                ts.Debug.fail("Unknown special property assignment kind");
-                        }
-                    }
-                    return checkStrictModeBinaryExpression(node);
-                case 252 /* CatchClause */:
-                    return checkStrictModeCatchClause(node);
-                case 181 /* DeleteExpression */:
-                    return checkStrictModeDeleteExpression(node);
-                case 8 /* NumericLiteral */:
-                    return checkStrictModeNumericLiteral(node);
-                case 186 /* PostfixUnaryExpression */:
-                    return checkStrictModePostfixUnaryExpression(node);
-                case 185 /* PrefixUnaryExpression */:
-                    return checkStrictModePrefixUnaryExpression(node);
-                case 212 /* WithStatement */:
-                    return checkStrictModeWithStatement(node);
-                case 165 /* ThisType */:
-                    seenThisKeyword = true;
-                    return;
-                case 154 /* TypePredicate */:
-                    return checkTypePredicate(node);
-                case 141 /* TypeParameter */:
-                    return declareSymbolAndAddToSymbolTable(node, 262144 /* TypeParameter */, 530920 /* TypeParameterExcludes */);
-                case 142 /* Parameter */:
-                    return bindParameter(node);
-                case 218 /* VariableDeclaration */:
-                case 169 /* BindingElement */:
-                    return bindVariableDeclarationOrBindingElement(node);
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
-                case 266 /* JSDocRecordMember */:
-                    return bindPropertyOrMethodOrAccessor(node, 4 /* Property */ | (node.questionToken ? 536870912 /* Optional */ : 0 /* None */), 0 /* PropertyExcludes */);
-                case 280 /* JSDocPropertyTag */:
-                    return bindJSDocProperty(node);
-                case 253 /* PropertyAssignment */:
-                case 254 /* ShorthandPropertyAssignment */:
-                    return bindPropertyOrMethodOrAccessor(node, 4 /* Property */, 0 /* PropertyExcludes */);
-                case 255 /* EnumMember */:
-                    return bindPropertyOrMethodOrAccessor(node, 8 /* EnumMember */, 900095 /* EnumMemberExcludes */);
-                case 247 /* JsxSpreadAttribute */:
-                    emitFlags |= 16384 /* HasJsxSpreadAttributes */;
-                    return;
-                case 151 /* CallSignature */:
-                case 152 /* ConstructSignature */:
-                case 153 /* IndexSignature */:
-                    return declareSymbolAndAddToSymbolTable(node, 131072 /* Signature */, 0 /* None */);
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                    // If this is an ObjectLiteralExpression method, then it sits in the same space
-                    // as other properties in the object literal.  So we use SymbolFlags.PropertyExcludes
-                    // so that it will conflict with any other object literal members with the same
-                    // name.
-                    return bindPropertyOrMethodOrAccessor(node, 8192 /* Method */ | (node.questionToken ? 536870912 /* Optional */ : 0 /* None */), ts.isObjectLiteralMethod(node) ? 0 /* PropertyExcludes */ : 99263 /* MethodExcludes */);
-                case 220 /* FunctionDeclaration */:
-                    return bindFunctionDeclaration(node);
-                case 148 /* Constructor */:
-                    return declareSymbolAndAddToSymbolTable(node, 16384 /* Constructor */, /*symbolExcludes:*/ 0 /* None */);
-                case 149 /* GetAccessor */:
-                    return bindPropertyOrMethodOrAccessor(node, 32768 /* GetAccessor */, 41919 /* GetAccessorExcludes */);
-                case 150 /* SetAccessor */:
-                    return bindPropertyOrMethodOrAccessor(node, 65536 /* SetAccessor */, 74687 /* SetAccessorExcludes */);
-                case 156 /* FunctionType */:
-                case 157 /* ConstructorType */:
-                case 269 /* JSDocFunctionType */:
-                    return bindFunctionOrConstructorType(node);
-                case 159 /* TypeLiteral */:
-                case 281 /* JSDocTypeLiteral */:
-                case 265 /* JSDocRecordType */:
-                    return bindAnonymousDeclaration(node, 2048 /* TypeLiteral */, "__type");
-                case 171 /* ObjectLiteralExpression */:
-                    return bindObjectLiteralExpression(node);
-                case 179 /* FunctionExpression */:
-                case 180 /* ArrowFunction */:
-                    return bindFunctionExpression(node);
-                case 174 /* CallExpression */:
-                    if (ts.isInJavaScriptFile(node)) {
-                        bindCallExpression(node);
-                    }
-                    break;
-                // Members of classes, interfaces, and modules
-                case 192 /* ClassExpression */:
-                case 221 /* ClassDeclaration */:
-                    // All classes are automatically in strict mode in ES6.
-                    inStrictMode = true;
-                    return bindClassLikeDeclaration(node);
-                case 222 /* InterfaceDeclaration */:
-                    return bindBlockScopedDeclaration(node, 64 /* Interface */, 792968 /* InterfaceExcludes */);
-                case 279 /* JSDocTypedefTag */:
-                case 223 /* TypeAliasDeclaration */:
-                    return bindBlockScopedDeclaration(node, 524288 /* TypeAlias */, 793064 /* TypeAliasExcludes */);
-                case 224 /* EnumDeclaration */:
-                    return bindEnumDeclaration(node);
-                case 225 /* ModuleDeclaration */:
-                    return bindModuleDeclaration(node);
-                // Imports and exports
-                case 229 /* ImportEqualsDeclaration */:
-                case 232 /* NamespaceImport */:
-                case 234 /* ImportSpecifier */:
-                case 238 /* ExportSpecifier */:
-                    return declareSymbolAndAddToSymbolTable(node, 8388608 /* Alias */, 8388608 /* AliasExcludes */);
-                case 228 /* NamespaceExportDeclaration */:
-                    return bindNamespaceExportDeclaration(node);
-                case 231 /* ImportClause */:
-                    return bindImportClause(node);
-                case 236 /* ExportDeclaration */:
-                    return bindExportDeclaration(node);
-                case 235 /* ExportAssignment */:
-                    return bindExportAssignment(node);
-                case 256 /* SourceFile */:
-                    updateStrictModeStatementList(node.statements);
-                    return bindSourceFileIfExternalModule();
-                case 199 /* Block */:
-                    if (!ts.isFunctionLike(node.parent)) {
-                        return;
+        // The local type parameters are the combined set of type parameters from all declarations of the class,
+        // interface, or type alias.
+        function getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol) {
+            var result;
+            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                var node = _a[_i];
+                if (node.kind === 230 /* InterfaceDeclaration */ || node.kind === 229 /* ClassDeclaration */ ||
+                    node.kind === 199 /* ClassExpression */ || node.kind === 231 /* TypeAliasDeclaration */) {
+                    var declaration = node;
+                    if (declaration.typeParameters) {
+                        result = appendTypeParameters(result, declaration.typeParameters);
                     }
-                // Fall through
-                case 226 /* ModuleBlock */:
-                    return updateStrictModeStatementList(node.statements);
+                }
             }
+            return result;
         }
-        function checkTypePredicate(node) {
-            var parameterName = node.parameterName, type = node.type;
-            if (parameterName && parameterName.kind === 69 /* Identifier */) {
-                checkStrictModeIdentifier(parameterName);
-            }
-            if (parameterName && parameterName.kind === 165 /* ThisType */) {
-                seenThisKeyword = true;
+        // The full set of type parameters for a generic class or interface type consists of its outer type parameters plus
+        // its locally declared type parameters.
+        function getTypeParametersOfClassOrInterface(symbol) {
+            return ts.concatenate(getOuterTypeParametersOfClassOrInterface(symbol), getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol));
+        }
+        // A type is a mixin constructor if it has a single construct signature taking no type parameters and a single
+        // rest parameter of type any[].
+        function isMixinConstructorType(type) {
+            var signatures = getSignaturesOfType(type, 1 /* Construct */);
+            if (signatures.length === 1) {
+                var s = signatures[0];
+                return !s.typeParameters && s.parameters.length === 1 && s.hasRestParameter && getTypeOfParameter(s.parameters[0]) === anyArrayType;
             }
-            bind(type);
+            return false;
         }
-        function bindSourceFileIfExternalModule() {
-            setExportContextFlag(file);
-            if (ts.isExternalModule(file)) {
-                bindSourceFileAsExternalModule();
+        function isConstructorType(type) {
+            if (isValidBaseType(type) && getSignaturesOfType(type, 1 /* Construct */).length > 0) {
+                return true;
+            }
+            if (type.flags & 540672 /* TypeVariable */) {
+                var constraint = getBaseConstraintOfType(type);
+                return constraint && isValidBaseType(constraint) && isMixinConstructorType(constraint);
             }
+            return false;
         }
-        function bindSourceFileAsExternalModule() {
-            bindAnonymousDeclaration(file, 512 /* ValueModule */, "\"" + ts.removeFileExtension(file.fileName) + "\"");
+        function getBaseTypeNodeOfClass(type) {
+            return ts.getClassExtendsHeritageClauseElement(type.symbol.valueDeclaration);
         }
-        function bindExportAssignment(node) {
-            if (!container.symbol || !container.symbol.exports) {
-                // Export assignment in some sort of block construct
-                bindAnonymousDeclaration(node, 8388608 /* Alias */, getDeclarationName(node));
-            }
-            else {
-                var flags = node.kind === 235 /* ExportAssignment */ && ts.exportAssignmentIsAlias(node)
-                    ? 8388608 /* Alias */
-                    : 4 /* Property */;
-                declareSymbol(container.symbol.exports, container.symbol, node, flags, 0 /* PropertyExcludes */ | 8388608 /* AliasExcludes */);
+        function getConstructorsForTypeArguments(type, typeArgumentNodes, location) {
+            var typeArgCount = ts.length(typeArgumentNodes);
+            var isJavaScript = ts.isInJavaScriptFile(location);
+            return ts.filter(getSignaturesOfType(type, 1 /* Construct */), function (sig) { return (isJavaScript || typeArgCount >= getMinTypeArgumentCount(sig.typeParameters)) && typeArgCount <= ts.length(sig.typeParameters); });
+        }
+        function getInstantiatedConstructorsForTypeArguments(type, typeArgumentNodes, location) {
+            var signatures = getConstructorsForTypeArguments(type, typeArgumentNodes, location);
+            var typeArguments = ts.map(typeArgumentNodes, getTypeFromTypeNode);
+            return ts.sameMap(signatures, function (sig) { return ts.some(sig.typeParameters) ? getSignatureInstantiation(sig, typeArguments) : sig; });
+        }
+        /**
+         * The base constructor of a class can resolve to
+         * * undefinedType if the class has no extends clause,
+         * * unknownType if an error occurred during resolution of the extends expression,
+         * * nullType if the extends expression is the null value,
+         * * anyType if the extends expression has type any, or
+         * * an object type with at least one construct signature.
+         */
+        function getBaseConstructorTypeOfClass(type) {
+            if (!type.resolvedBaseConstructorType) {
+                var baseTypeNode = getBaseTypeNodeOfClass(type);
+                if (!baseTypeNode) {
+                    return type.resolvedBaseConstructorType = undefinedType;
+                }
+                if (!pushTypeResolution(type, 1 /* ResolvedBaseConstructorType */)) {
+                    return unknownType;
+                }
+                var baseConstructorType = checkExpression(baseTypeNode.expression);
+                if (baseConstructorType.flags & (32768 /* Object */ | 131072 /* Intersection */)) {
+                    // Resolving the members of a class requires us to resolve the base class of that class.
+                    // We force resolution here such that we catch circularities now.
+                    resolveStructuredTypeMembers(baseConstructorType);
+                }
+                if (!popTypeResolution()) {
+                    error(type.symbol.valueDeclaration, ts.Diagnostics._0_is_referenced_directly_or_indirectly_in_its_own_base_expression, symbolToString(type.symbol));
+                    return type.resolvedBaseConstructorType = unknownType;
+                }
+                if (!(baseConstructorType.flags & 1 /* Any */) && baseConstructorType !== nullWideningType && !isConstructorType(baseConstructorType)) {
+                    error(baseTypeNode.expression, ts.Diagnostics.Type_0_is_not_a_constructor_function_type, typeToString(baseConstructorType));
+                    return type.resolvedBaseConstructorType = unknownType;
+                }
+                type.resolvedBaseConstructorType = baseConstructorType;
             }
+            return type.resolvedBaseConstructorType;
         }
-        function bindNamespaceExportDeclaration(node) {
-            if (node.modifiers && node.modifiers.length) {
-                file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Modifiers_cannot_appear_here));
+        function getBaseTypes(type) {
+            if (!type.resolvedBaseTypes) {
+                if (type.objectFlags & 8 /* Tuple */) {
+                    type.resolvedBaseTypes = [createArrayType(getUnionType(type.typeParameters))];
+                }
+                else if (type.symbol.flags & (32 /* Class */ | 64 /* Interface */)) {
+                    if (type.symbol.flags & 32 /* Class */) {
+                        resolveBaseTypesOfClass(type);
+                    }
+                    if (type.symbol.flags & 64 /* Interface */) {
+                        resolveBaseTypesOfInterface(type);
+                    }
+                }
+                else {
+                    ts.Debug.fail("type must be class or interface");
+                }
             }
-            if (node.parent.kind !== 256 /* SourceFile */) {
-                file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Global_module_exports_may_only_appear_at_top_level));
+            return type.resolvedBaseTypes;
+        }
+        function resolveBaseTypesOfClass(type) {
+            type.resolvedBaseTypes = type.resolvedBaseTypes || emptyArray;
+            var baseConstructorType = getApparentType(getBaseConstructorTypeOfClass(type));
+            if (!(baseConstructorType.flags & (32768 /* Object */ | 131072 /* Intersection */ | 1 /* Any */))) {
                 return;
             }
+            var baseTypeNode = getBaseTypeNodeOfClass(type);
+            var typeArgs = typeArgumentsFromTypeReferenceNode(baseTypeNode);
+            var baseType;
+            var originalBaseType = baseConstructorType && baseConstructorType.symbol ? getDeclaredTypeOfSymbol(baseConstructorType.symbol) : undefined;
+            if (baseConstructorType.symbol && baseConstructorType.symbol.flags & 32 /* Class */ &&
+                areAllOuterTypeParametersApplied(originalBaseType)) {
+                // When base constructor type is a class with no captured type arguments we know that the constructors all have the same type parameters as the
+                // class and all return the instance type of the class. There is no need for further checks and we can apply the
+                // type arguments in the same manner as a type reference to get the same error reporting experience.
+                baseType = getTypeFromClassOrInterfaceReference(baseTypeNode, baseConstructorType.symbol, typeArgs);
+            }
+            else if (baseConstructorType.flags & 1 /* Any */) {
+                baseType = baseConstructorType;
+            }
             else {
-                var parent_6 = node.parent;
-                if (!ts.isExternalModule(parent_6)) {
-                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Global_module_exports_may_only_appear_in_module_files));
+                // The class derives from a "class-like" constructor function, check that we have at least one construct signature
+                // with a matching number of type parameters and use the return type of the first instantiated signature. Elsewhere
+                // we check that all instantiated signatures return the same type.
+                var constructors = getInstantiatedConstructorsForTypeArguments(baseConstructorType, baseTypeNode.typeArguments, baseTypeNode);
+                if (!constructors.length) {
+                    error(baseTypeNode.expression, ts.Diagnostics.No_base_constructor_has_the_specified_number_of_type_arguments);
                     return;
                 }
-                if (!parent_6.isDeclarationFile) {
-                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Global_module_exports_may_only_appear_in_declaration_files));
-                    return;
+                baseType = getReturnTypeOfSignature(constructors[0]);
+            }
+            // In a JS file, you can use the @augments jsdoc tag to specify a base type with type parameters
+            var valueDecl = type.symbol.valueDeclaration;
+            if (valueDecl && ts.isInJavaScriptFile(valueDecl)) {
+                var augTag = ts.getJSDocAugmentsTag(type.symbol.valueDeclaration);
+                if (augTag) {
+                    baseType = getTypeFromTypeNode(augTag.typeExpression.type);
                 }
             }
-            file.symbol.globalExports = file.symbol.globalExports || ts.createMap();
-            declareSymbol(file.symbol.globalExports, file.symbol, node, 8388608 /* Alias */, 8388608 /* AliasExcludes */);
-        }
-        function bindExportDeclaration(node) {
-            if (!container.symbol || !container.symbol.exports) {
-                // Export * in some sort of block construct
-                bindAnonymousDeclaration(node, 1073741824 /* ExportStar */, getDeclarationName(node));
+            if (baseType === unknownType) {
+                return;
             }
-            else if (!node.exportClause) {
-                // All export * declarations are collected in an __export symbol
-                declareSymbol(container.symbol.exports, container.symbol, node, 1073741824 /* ExportStar */, 0 /* None */);
+            if (!isValidBaseType(baseType)) {
+                error(baseTypeNode.expression, ts.Diagnostics.Base_constructor_return_type_0_is_not_a_class_or_interface_type, typeToString(baseType));
+                return;
             }
-        }
-        function bindImportClause(node) {
-            if (node.name) {
-                declareSymbolAndAddToSymbolTable(node, 8388608 /* Alias */, 8388608 /* AliasExcludes */);
+            if (type === baseType || hasBaseType(baseType, type)) {
+                error(valueDecl, ts.Diagnostics.Type_0_recursively_references_itself_as_a_base_type, typeToString(type, /*enclosingDeclaration*/ undefined, 1 /* WriteArrayAsGenericType */));
+                return;
             }
-        }
-        function setCommonJsModuleIndicator(node) {
-            if (!file.commonJsModuleIndicator) {
-                file.commonJsModuleIndicator = node;
-                bindSourceFileAsExternalModule();
+            if (type.resolvedBaseTypes === emptyArray) {
+                type.resolvedBaseTypes = [baseType];
+            }
+            else {
+                type.resolvedBaseTypes.push(baseType);
             }
         }
-        function bindExportsPropertyAssignment(node) {
-            // When we create a property via 'exports.foo = bar', the 'exports.foo' property access
-            // expression is the declaration
-            setCommonJsModuleIndicator(node);
-            declareSymbol(file.symbol.exports, file.symbol, node.left, 4 /* Property */ | 7340032 /* Export */, 0 /* None */);
+        function areAllOuterTypeParametersApplied(type) {
+            // An unapplied type parameter has its symbol still the same as the matching argument symbol.
+            // Since parameters are applied outer-to-inner, only the last outer parameter needs to be checked.
+            var outerTypeParameters = type.outerTypeParameters;
+            if (outerTypeParameters) {
+                var last = outerTypeParameters.length - 1;
+                var typeArguments = type.typeArguments;
+                return outerTypeParameters[last].symbol !== typeArguments[last].symbol;
+            }
+            return true;
         }
-        function bindModuleExportsAssignment(node) {
-            // 'module.exports = expr' assignment
-            setCommonJsModuleIndicator(node);
-            declareSymbol(file.symbol.exports, file.symbol, node, 4 /* Property */ | 7340032 /* Export */ | 512 /* ValueModule */, 0 /* None */);
+        // A valid base type is `any`, any non-generic object type or intersection of non-generic
+        // object types.
+        function isValidBaseType(type) {
+            return type.flags & (32768 /* Object */ | 16777216 /* NonPrimitive */ | 1 /* Any */) && !isGenericMappedType(type) ||
+                type.flags & 131072 /* Intersection */ && !ts.forEach(type.types, function (t) { return !isValidBaseType(t); });
         }
-        function bindThisPropertyAssignment(node) {
-            ts.Debug.assert(ts.isInJavaScriptFile(node));
-            // Declare a 'member' if the container is an ES5 class or ES6 constructor
-            if (container.kind === 220 /* FunctionDeclaration */ || container.kind === 179 /* FunctionExpression */) {
-                container.symbol.members = container.symbol.members || ts.createMap();
-                // It's acceptable for multiple 'this' assignments of the same identifier to occur
-                declareSymbol(container.symbol.members, container.symbol, node, 4 /* Property */, 0 /* PropertyExcludes */ & ~4 /* Property */);
-            }
-            else if (container.kind === 148 /* Constructor */) {
-                // this.foo assignment in a JavaScript class
-                // Bind this property to the containing class
-                var saveContainer = container;
-                container = container.parent;
-                var symbol = bindPropertyOrMethodOrAccessor(node, 4 /* Property */, 0 /* None */);
-                if (symbol) {
-                    // constructor-declared symbols can be overwritten by subsequent method declarations
-                    symbol.isReplaceableByMethod = true;
+        function resolveBaseTypesOfInterface(type) {
+            type.resolvedBaseTypes = type.resolvedBaseTypes || emptyArray;
+            for (var _i = 0, _a = type.symbol.declarations; _i < _a.length; _i++) {
+                var declaration = _a[_i];
+                if (declaration.kind === 230 /* InterfaceDeclaration */ && ts.getInterfaceBaseTypeNodes(declaration)) {
+                    for (var _b = 0, _c = ts.getInterfaceBaseTypeNodes(declaration); _b < _c.length; _b++) {
+                        var node = _c[_b];
+                        var baseType = getTypeFromTypeNode(node);
+                        if (baseType !== unknownType) {
+                            if (isValidBaseType(baseType)) {
+                                if (type !== baseType && !hasBaseType(baseType, type)) {
+                                    if (type.resolvedBaseTypes === emptyArray) {
+                                        type.resolvedBaseTypes = [baseType];
+                                    }
+                                    else {
+                                        type.resolvedBaseTypes.push(baseType);
+                                    }
+                                }
+                                else {
+                                    error(declaration, ts.Diagnostics.Type_0_recursively_references_itself_as_a_base_type, typeToString(type, /*enclosingDeclaration*/ undefined, 1 /* WriteArrayAsGenericType */));
+                                }
+                            }
+                            else {
+                                error(node, ts.Diagnostics.An_interface_may_only_extend_a_class_or_another_interface);
+                            }
+                        }
+                    }
                 }
-                container = saveContainer;
             }
         }
-        function bindPrototypePropertyAssignment(node) {
-            // We saw a node of the form 'x.prototype.y = z'. Declare a 'member' y on x if x was a function.
-            // Look up the function in the local scope, since prototype assignments should
-            // follow the function declaration
-            var leftSideOfAssignment = node.left;
-            var classPrototype = leftSideOfAssignment.expression;
-            var constructorFunction = classPrototype.expression;
-            // Fix up parent pointers since we're going to use these nodes before we bind into them
-            leftSideOfAssignment.parent = node;
-            constructorFunction.parent = classPrototype;
-            classPrototype.parent = leftSideOfAssignment;
-            var funcSymbol = container.locals[constructorFunction.text];
-            if (!funcSymbol || !(funcSymbol.flags & 16 /* Function */ || ts.isDeclarationOfFunctionExpression(funcSymbol))) {
-                return;
-            }
-            // Set up the members collection if it doesn't exist already
-            if (!funcSymbol.members) {
-                funcSymbol.members = ts.createMap();
+        // Returns true if the interface given by the symbol is free of "this" references. Specifically, the result is
+        // true if the interface itself contains no references to "this" in its body, if all base types are interfaces,
+        // and if none of the base interfaces have a "this" type.
+        function isIndependentInterface(symbol) {
+            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                var declaration = _a[_i];
+                if (declaration.kind === 230 /* InterfaceDeclaration */) {
+                    if (declaration.flags & 64 /* ContainsThis */) {
+                        return false;
+                    }
+                    var baseTypeNodes = ts.getInterfaceBaseTypeNodes(declaration);
+                    if (baseTypeNodes) {
+                        for (var _b = 0, baseTypeNodes_1 = baseTypeNodes; _b < baseTypeNodes_1.length; _b++) {
+                            var node = baseTypeNodes_1[_b];
+                            if (ts.isEntityNameExpression(node.expression)) {
+                                var baseSymbol = resolveEntityName(node.expression, 793064 /* Type */, /*ignoreErrors*/ true);
+                                if (!baseSymbol || !(baseSymbol.flags & 64 /* Interface */) || getDeclaredTypeOfClassOrInterface(baseSymbol).thisType) {
+                                    return false;
+                                }
+                            }
+                        }
+                    }
+                }
             }
-            // Declare the method/property
-            declareSymbol(funcSymbol.members, funcSymbol, leftSideOfAssignment, 4 /* Property */, 0 /* PropertyExcludes */);
+            return true;
         }
-        function bindCallExpression(node) {
-            // We're only inspecting call expressions to detect CommonJS modules, so we can skip
-            // this check if we've already seen the module indicator
-            if (!file.commonJsModuleIndicator && ts.isRequireCall(node, /*checkArgumentIsStringLiteral*/ false)) {
-                setCommonJsModuleIndicator(node);
+        function getDeclaredTypeOfClassOrInterface(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.declaredType) {
+                var kind = symbol.flags & 32 /* Class */ ? 1 /* Class */ : 2 /* Interface */;
+                var type = links.declaredType = createObjectType(kind, symbol);
+                var outerTypeParameters = getOuterTypeParametersOfClassOrInterface(symbol);
+                var localTypeParameters = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol);
+                // A class or interface is generic if it has type parameters or a "this" type. We always give classes a "this" type
+                // because it is not feasible to analyze all members to determine if the "this" type escapes the class (in particular,
+                // property types inferred from initializers and method return types inferred from return statements are very hard
+                // to exhaustively analyze). We give interfaces a "this" type if we can't definitely determine that they are free of
+                // "this" references.
+                if (outerTypeParameters || localTypeParameters || kind === 1 /* Class */ || !isIndependentInterface(symbol)) {
+                    type.objectFlags |= 4 /* Reference */;
+                    type.typeParameters = ts.concatenate(outerTypeParameters, localTypeParameters);
+                    type.outerTypeParameters = outerTypeParameters;
+                    type.localTypeParameters = localTypeParameters;
+                    type.instantiations = ts.createMap();
+                    type.instantiations.set(getTypeListId(type.typeParameters), type);
+                    type.target = type;
+                    type.typeArguments = type.typeParameters;
+                    type.thisType = createType(16384 /* TypeParameter */);
+                    type.thisType.isThisType = true;
+                    type.thisType.symbol = symbol;
+                    type.thisType.constraint = type;
+                }
             }
+            return links.declaredType;
         }
-        function bindClassLikeDeclaration(node) {
-            if (!ts.isDeclarationFile(file) && !ts.isInAmbientContext(node)) {
-                if (ts.getClassExtendsHeritageClauseElement(node) !== undefined) {
-                    emitFlags |= 1024 /* HasClassExtends */;
+        function getDeclaredTypeOfTypeAlias(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.declaredType) {
+                // Note that we use the links object as the target here because the symbol object is used as the unique
+                // identity for resolution of the 'type' property in SymbolLinks.
+                if (!pushTypeResolution(symbol, 2 /* DeclaredType */)) {
+                    return unknownType;
                 }
-                if (ts.nodeIsDecorated(node)) {
-                    emitFlags |= 2048 /* HasDecorators */;
+                var declaration = ts.getDeclarationOfKind(symbol, 291 /* JSDocTypedefTag */);
+                var type = void 0;
+                if (declaration) {
+                    if (declaration.jsDocTypeLiteral) {
+                        type = getTypeFromTypeNode(declaration.jsDocTypeLiteral);
+                    }
+                    else {
+                        type = getTypeFromTypeNode(declaration.typeExpression.type);
+                    }
                 }
-            }
-            if (node.kind === 221 /* ClassDeclaration */) {
-                bindBlockScopedDeclaration(node, 32 /* Class */, 899519 /* ClassExcludes */);
-            }
-            else {
-                var bindingName = node.name ? node.name.text : "__class";
-                bindAnonymousDeclaration(node, 32 /* Class */, bindingName);
-                // Add name of class expression into the map for semantic classifier
-                if (node.name) {
-                    classifiableNames[node.name.text] = node.name.text;
+                else {
+                    declaration = ts.getDeclarationOfKind(symbol, 231 /* TypeAliasDeclaration */);
+                    type = getTypeFromTypeNode(declaration.type);
+                }
+                if (popTypeResolution()) {
+                    var typeParameters = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol);
+                    if (typeParameters) {
+                        // Initialize the instantiation cache for generic type aliases. The declared type corresponds to
+                        // an instantiation of the type alias with the type parameters supplied as type arguments.
+                        links.typeParameters = typeParameters;
+                        links.instantiations = ts.createMap();
+                        links.instantiations.set(getTypeListId(typeParameters), type);
+                    }
                 }
+                else {
+                    type = unknownType;
+                    error(declaration.name, ts.Diagnostics.Type_alias_0_circularly_references_itself, symbolToString(symbol));
+                }
+                links.declaredType = type;
+            }
+            return links.declaredType;
+        }
+        function isLiteralEnumMember(member) {
+            var expr = member.initializer;
+            if (!expr) {
+                return !ts.isInAmbientContext(member);
             }
-            var symbol = node.symbol;
-            // TypeScript 1.0 spec (April 2014): 8.4
-            // Every class automatically contains a static property member named 'prototype', the
-            // type of which is an instantiation of the class type with type Any supplied as a type
-            // argument for each type parameter. It is an error to explicitly declare a static
-            // property member with the name 'prototype'.
-            //
-            // Note: we check for this here because this class may be merging into a module.  The
-            // module might have an exported variable called 'prototype'.  We can't allow that as
-            // that would clash with the built-in 'prototype' for the class.
-            var prototypeSymbol = createSymbol(4 /* Property */ | 134217728 /* Prototype */, "prototype");
-            if (symbol.exports[prototypeSymbol.name]) {
-                if (node.name) {
-                    node.name.parent = node;
+            return expr.kind === 9 /* StringLiteral */ || expr.kind === 8 /* NumericLiteral */ ||
+                expr.kind === 192 /* PrefixUnaryExpression */ && expr.operator === 38 /* MinusToken */ &&
+                    expr.operand.kind === 8 /* NumericLiteral */ ||
+                expr.kind === 71 /* Identifier */ && (ts.nodeIsMissing(expr) || !!getSymbolOfNode(member.parent).exports.get(expr.text));
+        }
+        function getEnumKind(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (links.enumKind !== undefined) {
+                return links.enumKind;
+            }
+            var hasNonLiteralMember = false;
+            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                var declaration = _a[_i];
+                if (declaration.kind === 232 /* EnumDeclaration */) {
+                    for (var _b = 0, _c = declaration.members; _b < _c.length; _b++) {
+                        var member = _c[_b];
+                        if (member.initializer && member.initializer.kind === 9 /* StringLiteral */) {
+                            return links.enumKind = 1 /* Literal */;
+                        }
+                        if (!isLiteralEnumMember(member)) {
+                            hasNonLiteralMember = true;
+                        }
+                    }
                 }
-                file.bindDiagnostics.push(ts.createDiagnosticForNode(symbol.exports[prototypeSymbol.name].declarations[0], ts.Diagnostics.Duplicate_identifier_0, prototypeSymbol.name));
             }
-            symbol.exports[prototypeSymbol.name] = prototypeSymbol;
-            prototypeSymbol.parent = symbol;
+            return links.enumKind = hasNonLiteralMember ? 0 /* Numeric */ : 1 /* Literal */;
         }
-        function bindEnumDeclaration(node) {
-            return ts.isConst(node)
-                ? bindBlockScopedDeclaration(node, 128 /* ConstEnum */, 899967 /* ConstEnumExcludes */)
-                : bindBlockScopedDeclaration(node, 256 /* RegularEnum */, 899327 /* RegularEnumExcludes */);
+        function getBaseTypeOfEnumLiteralType(type) {
+            return type.flags & 256 /* EnumLiteral */ && !(type.flags & 65536 /* Union */) ? getDeclaredTypeOfSymbol(getParentOfSymbol(type.symbol)) : type;
         }
-        function bindVariableDeclarationOrBindingElement(node) {
-            if (inStrictMode) {
-                checkStrictModeEvalOrArguments(node, node.name);
+        function getDeclaredTypeOfEnum(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (links.declaredType) {
+                return links.declaredType;
             }
-            if (!ts.isBindingPattern(node.name)) {
-                if (ts.isBlockOrCatchScoped(node)) {
-                    bindBlockScopedVariableDeclaration(node);
+            if (getEnumKind(symbol) === 1 /* Literal */) {
+                enumCount++;
+                var memberTypeList = [];
+                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                    var declaration = _a[_i];
+                    if (declaration.kind === 232 /* EnumDeclaration */) {
+                        for (var _b = 0, _c = declaration.members; _b < _c.length; _b++) {
+                            var member = _c[_b];
+                            var memberType = getLiteralType(getEnumMemberValue(member), enumCount, getSymbolOfNode(member));
+                            getSymbolLinks(getSymbolOfNode(member)).declaredType = memberType;
+                            memberTypeList.push(memberType);
+                        }
+                    }
                 }
-                else if (ts.isParameterDeclaration(node)) {
-                    // It is safe to walk up parent chain to find whether the node is a destructing parameter declaration
-                    // because its parent chain has already been set up, since parents are set before descending into children.
-                    //
-                    // If node is a binding element in parameter declaration, we need to use ParameterExcludes.
-                    // Using ParameterExcludes flag allows the compiler to report an error on duplicate identifiers in Parameter Declaration
-                    // For example:
-                    //      function foo([a,a]) {} // Duplicate Identifier error
-                    //      function bar(a,a) {}   // Duplicate Identifier error, parameter declaration in this case is handled in bindParameter
-                    //                             // which correctly set excluded symbols
-                    declareSymbolAndAddToSymbolTable(node, 1 /* FunctionScopedVariable */, 107455 /* ParameterExcludes */);
+                if (memberTypeList.length) {
+                    var enumType_1 = getUnionType(memberTypeList, /*subtypeReduction*/ false, symbol, /*aliasTypeArguments*/ undefined);
+                    if (enumType_1.flags & 65536 /* Union */) {
+                        enumType_1.flags |= 256 /* EnumLiteral */;
+                        enumType_1.symbol = symbol;
+                    }
+                    return links.declaredType = enumType_1;
                 }
-                else {
-                    declareSymbolAndAddToSymbolTable(node, 1 /* FunctionScopedVariable */, 107454 /* FunctionScopedVariableExcludes */);
+            }
+            var enumType = createType(16 /* Enum */);
+            enumType.symbol = symbol;
+            return links.declaredType = enumType;
+        }
+        function getDeclaredTypeOfEnumMember(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.declaredType) {
+                var enumType = getDeclaredTypeOfEnum(getParentOfSymbol(symbol));
+                if (!links.declaredType) {
+                    links.declaredType = enumType;
                 }
             }
+            return links.declaredType;
         }
-        function bindParameter(node) {
-            if (!ts.isDeclarationFile(file) &&
-                !ts.isInAmbientContext(node) &&
-                ts.nodeIsDecorated(node)) {
-                emitFlags |= (2048 /* HasDecorators */ | 4096 /* HasParamDecorators */);
+        function getDeclaredTypeOfTypeParameter(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.declaredType) {
+                var type = createType(16384 /* TypeParameter */);
+                type.symbol = symbol;
+                links.declaredType = type;
             }
-            if (inStrictMode) {
-                // It is a SyntaxError if the identifier eval or arguments appears within a FormalParameterList of a
-                // strict mode FunctionLikeDeclaration or FunctionExpression(13.1)
-                checkStrictModeEvalOrArguments(node, node.name);
+            return links.declaredType;
+        }
+        function getDeclaredTypeOfAlias(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.declaredType) {
+                links.declaredType = getDeclaredTypeOfSymbol(resolveAlias(symbol));
             }
-            if (ts.isBindingPattern(node.name)) {
-                bindAnonymousDeclaration(node, 1 /* FunctionScopedVariable */, getDestructuringParameterName(node));
+            return links.declaredType;
+        }
+        function getDeclaredTypeOfSymbol(symbol) {
+            if (symbol.flags & (32 /* Class */ | 64 /* Interface */)) {
+                return getDeclaredTypeOfClassOrInterface(symbol);
             }
-            else {
-                declareSymbolAndAddToSymbolTable(node, 1 /* FunctionScopedVariable */, 107455 /* ParameterExcludes */);
+            if (symbol.flags & 524288 /* TypeAlias */) {
+                return getDeclaredTypeOfTypeAlias(symbol);
             }
-            // If this is a property-parameter, then also declare the property symbol into the
-            // containing class.
-            if (ts.isParameterPropertyDeclaration(node)) {
-                var classDeclaration = node.parent.parent;
-                declareSymbol(classDeclaration.symbol.members, classDeclaration.symbol, node, 4 /* Property */ | (node.questionToken ? 536870912 /* Optional */ : 0 /* None */), 0 /* PropertyExcludes */);
+            if (symbol.flags & 262144 /* TypeParameter */) {
+                return getDeclaredTypeOfTypeParameter(symbol);
             }
-        }
-        function bindFunctionDeclaration(node) {
-            if (!ts.isDeclarationFile(file) && !ts.isInAmbientContext(node)) {
-                if (ts.isAsyncFunctionLike(node)) {
-                    emitFlags |= 8192 /* HasAsyncFunctions */;
-                }
+            if (symbol.flags & 384 /* Enum */) {
+                return getDeclaredTypeOfEnum(symbol);
             }
-            checkStrictModeFunctionName(node);
-            if (inStrictMode) {
-                checkStrictModeFunctionDeclaration(node);
-                bindBlockScopedDeclaration(node, 16 /* Function */, 106927 /* FunctionExcludes */);
+            if (symbol.flags & 8 /* EnumMember */) {
+                return getDeclaredTypeOfEnumMember(symbol);
             }
-            else {
-                declareSymbolAndAddToSymbolTable(node, 16 /* Function */, 106927 /* FunctionExcludes */);
+            if (symbol.flags & 8388608 /* Alias */) {
+                return getDeclaredTypeOfAlias(symbol);
             }
+            return unknownType;
         }
-        function bindFunctionExpression(node) {
-            if (!ts.isDeclarationFile(file) && !ts.isInAmbientContext(node)) {
-                if (ts.isAsyncFunctionLike(node)) {
-                    emitFlags |= 8192 /* HasAsyncFunctions */;
+        // A type reference is considered independent if each type argument is considered independent.
+        function isIndependentTypeReference(node) {
+            if (node.typeArguments) {
+                for (var _i = 0, _a = node.typeArguments; _i < _a.length; _i++) {
+                    var typeNode = _a[_i];
+                    if (!isIndependentType(typeNode)) {
+                        return false;
+                    }
                 }
             }
-            if (currentFlow) {
-                node.flowNode = currentFlow;
-            }
-            checkStrictModeFunctionName(node);
-            var bindingName = node.name ? node.name.text : "__function";
-            return bindAnonymousDeclaration(node, 16 /* Function */, bindingName);
+            return true;
         }
-        function bindPropertyOrMethodOrAccessor(node, symbolFlags, symbolExcludes) {
-            if (!ts.isDeclarationFile(file) && !ts.isInAmbientContext(node)) {
-                if (ts.isAsyncFunctionLike(node)) {
-                    emitFlags |= 8192 /* HasAsyncFunctions */;
-                }
-                if (ts.nodeIsDecorated(node)) {
-                    emitFlags |= 2048 /* HasDecorators */;
-                }
+        // A type is considered independent if it the any, string, number, boolean, symbol, or void keyword, a string
+        // literal type, an array with an element type that is considered independent, or a type reference that is
+        // considered independent.
+        function isIndependentType(node) {
+            switch (node.kind) {
+                case 119 /* AnyKeyword */:
+                case 136 /* StringKeyword */:
+                case 133 /* NumberKeyword */:
+                case 122 /* BooleanKeyword */:
+                case 137 /* SymbolKeyword */:
+                case 134 /* ObjectKeyword */:
+                case 105 /* VoidKeyword */:
+                case 139 /* UndefinedKeyword */:
+                case 95 /* NullKeyword */:
+                case 130 /* NeverKeyword */:
+                case 173 /* LiteralType */:
+                    return true;
+                case 164 /* ArrayType */:
+                    return isIndependentType(node.elementType);
+                case 159 /* TypeReference */:
+                    return isIndependentTypeReference(node);
             }
-            return ts.hasDynamicName(node)
-                ? bindAnonymousDeclaration(node, symbolFlags, "__computed")
-                : declareSymbolAndAddToSymbolTable(node, symbolFlags, symbolExcludes);
-        }
-        function bindJSDocProperty(node) {
-            return declareSymbolAndAddToSymbolTable(node, 4 /* Property */, 0 /* PropertyExcludes */);
+            return false;
         }
-        // reachability checks
-        function shouldReportErrorOnModuleDeclaration(node) {
-            var instanceState = getModuleInstanceState(node);
-            return instanceState === 1 /* Instantiated */ || (instanceState === 2 /* ConstEnumOnly */ && options.preserveConstEnums);
+        // A variable-like declaration is considered independent (free of this references) if it has a type annotation
+        // that specifies an independent type, or if it has no type annotation and no initializer (and thus of type any).
+        function isIndependentVariableLikeDeclaration(node) {
+            var typeNode = ts.getEffectiveTypeAnnotationNode(node);
+            return typeNode ? isIndependentType(typeNode) : !node.initializer;
         }
-        function checkUnreachable(node) {
-            if (!(currentFlow.flags & 1 /* Unreachable */)) {
-                return false;
+        // A function-like declaration is considered independent (free of this references) if it has a return type
+        // annotation that is considered independent and if each parameter is considered independent.
+        function isIndependentFunctionLikeDeclaration(node) {
+            if (node.kind !== 152 /* Constructor */) {
+                var typeNode = ts.getEffectiveReturnTypeNode(node);
+                if (!typeNode || !isIndependentType(typeNode)) {
+                    return false;
+                }
             }
-            if (currentFlow === unreachableFlow) {
-                var reportError = 
-                // report error on all statements except empty ones
-                (ts.isStatementButNotDeclaration(node) && node.kind !== 201 /* EmptyStatement */) ||
-                    // report error on class declarations
-                    node.kind === 221 /* ClassDeclaration */ ||
-                    // report error on instantiated modules or const-enums only modules if preserveConstEnums is set
-                    (node.kind === 225 /* ModuleDeclaration */ && shouldReportErrorOnModuleDeclaration(node)) ||
-                    // report error on regular enums and const enums if preserveConstEnums is set
-                    (node.kind === 224 /* EnumDeclaration */ && (!ts.isConstEnumDeclaration(node) || options.preserveConstEnums));
-                if (reportError) {
-                    currentFlow = reportedUnreachableFlow;
-                    // unreachable code is reported if
-                    // - user has explicitly asked about it AND
-                    // - statement is in not ambient context (statements in ambient context is already an error
-                    //   so we should not report extras) AND
-                    //   - node is not variable statement OR
-                    //   - node is block scoped variable statement OR
-                    //   - node is not block scoped variable statement and at least one variable declaration has initializer
-                    //   Rationale: we don't want to report errors on non-initialized var's since they are hoisted
-                    //   On the other side we do want to report errors on non-initialized 'lets' because of TDZ
-                    var reportUnreachableCode = !options.allowUnreachableCode &&
-                        !ts.isInAmbientContext(node) &&
-                        (node.kind !== 200 /* VariableStatement */ ||
-                            ts.getCombinedNodeFlags(node.declarationList) & 3 /* BlockScoped */ ||
-                            ts.forEach(node.declarationList.declarations, function (d) { return d.initializer; }));
-                    if (reportUnreachableCode) {
-                        errorOnFirstToken(node, ts.Diagnostics.Unreachable_code_detected);
-                    }
+            for (var _i = 0, _a = node.parameters; _i < _a.length; _i++) {
+                var parameter = _a[_i];
+                if (!isIndependentVariableLikeDeclaration(parameter)) {
+                    return false;
                 }
             }
             return true;
         }
-    }
-    /**
-     * Computes the transform flags for a node, given the transform flags of its subtree
-     *
-     * @param node The node to analyze
-     * @param subtreeFlags Transform flags computed for this node's subtree
-     */
-    function computeTransformFlagsForNode(node, subtreeFlags) {
-        var kind = node.kind;
-        switch (kind) {
-            case 174 /* CallExpression */:
-                return computeCallExpression(node, subtreeFlags);
-            case 225 /* ModuleDeclaration */:
-                return computeModuleDeclaration(node, subtreeFlags);
-            case 178 /* ParenthesizedExpression */:
-                return computeParenthesizedExpression(node, subtreeFlags);
-            case 187 /* BinaryExpression */:
-                return computeBinaryExpression(node, subtreeFlags);
-            case 202 /* ExpressionStatement */:
-                return computeExpressionStatement(node, subtreeFlags);
-            case 142 /* Parameter */:
-                return computeParameter(node, subtreeFlags);
-            case 180 /* ArrowFunction */:
-                return computeArrowFunction(node, subtreeFlags);
-            case 179 /* FunctionExpression */:
-                return computeFunctionExpression(node, subtreeFlags);
-            case 220 /* FunctionDeclaration */:
-                return computeFunctionDeclaration(node, subtreeFlags);
-            case 218 /* VariableDeclaration */:
-                return computeVariableDeclaration(node, subtreeFlags);
-            case 219 /* VariableDeclarationList */:
-                return computeVariableDeclarationList(node, subtreeFlags);
-            case 200 /* VariableStatement */:
-                return computeVariableStatement(node, subtreeFlags);
-            case 214 /* LabeledStatement */:
-                return computeLabeledStatement(node, subtreeFlags);
-            case 221 /* ClassDeclaration */:
-                return computeClassDeclaration(node, subtreeFlags);
-            case 192 /* ClassExpression */:
-                return computeClassExpression(node, subtreeFlags);
-            case 251 /* HeritageClause */:
-                return computeHeritageClause(node, subtreeFlags);
-            case 194 /* ExpressionWithTypeArguments */:
-                return computeExpressionWithTypeArguments(node, subtreeFlags);
-            case 148 /* Constructor */:
-                return computeConstructor(node, subtreeFlags);
-            case 145 /* PropertyDeclaration */:
-                return computePropertyDeclaration(node, subtreeFlags);
-            case 147 /* MethodDeclaration */:
-                return computeMethod(node, subtreeFlags);
-            case 149 /* GetAccessor */:
-            case 150 /* SetAccessor */:
-                return computeAccessor(node, subtreeFlags);
-            case 229 /* ImportEqualsDeclaration */:
-                return computeImportEquals(node, subtreeFlags);
-            case 172 /* PropertyAccessExpression */:
-                return computePropertyAccess(node, subtreeFlags);
-            default:
-                return computeOther(node, kind, subtreeFlags);
-        }
-    }
-    ts.computeTransformFlagsForNode = computeTransformFlagsForNode;
-    function computeCallExpression(node, subtreeFlags) {
-        var transformFlags = subtreeFlags;
-        var expression = node.expression;
-        var expressionKind = expression.kind;
-        if (subtreeFlags & 262144 /* ContainsSpreadElementExpression */
-            || isSuperOrSuperProperty(expression, expressionKind)) {
-            // If the this node contains a SpreadElementExpression, or is a super call, then it is an ES6
-            // node.
-            transformFlags |= 192 /* AssertES6 */;
-        }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~537133909 /* ArrayLiteralOrCallOrNewExcludes */;
-    }
-    function isSuperOrSuperProperty(node, kind) {
-        switch (kind) {
-            case 95 /* SuperKeyword */:
-                return true;
-            case 172 /* PropertyAccessExpression */:
-            case 173 /* ElementAccessExpression */:
-                var expression = node.expression;
-                var expressionKind = expression.kind;
-                return expressionKind === 95 /* SuperKeyword */;
-        }
-        return false;
-    }
-    function computeBinaryExpression(node, subtreeFlags) {
-        var transformFlags = subtreeFlags;
-        var operatorTokenKind = node.operatorToken.kind;
-        var leftKind = node.left.kind;
-        if (operatorTokenKind === 56 /* EqualsToken */
-            && (leftKind === 171 /* ObjectLiteralExpression */
-                || leftKind === 170 /* ArrayLiteralExpression */)) {
-            // Destructuring assignments are ES6 syntax.
-            transformFlags |= 192 /* AssertES6 */ | 256 /* DestructuringAssignment */;
-        }
-        else if (operatorTokenKind === 38 /* AsteriskAsteriskToken */
-            || operatorTokenKind === 60 /* AsteriskAsteriskEqualsToken */) {
-            // Exponentiation is ES7 syntax.
-            transformFlags |= 48 /* AssertES7 */;
-        }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~536871765 /* NodeExcludes */;
-    }
-    function computeParameter(node, subtreeFlags) {
-        var transformFlags = subtreeFlags;
-        var modifierFlags = ts.getModifierFlags(node);
-        var name = node.name;
-        var initializer = node.initializer;
-        var dotDotDotToken = node.dotDotDotToken;
-        // If the parameter has a question token, then it is TypeScript syntax.
-        if (node.questionToken) {
-            transformFlags |= 3 /* AssertTypeScript */;
-        }
-        // If the parameter's name is 'this', then it is TypeScript syntax.
-        if (subtreeFlags & 2048 /* ContainsDecorators */
-            || (name && ts.isIdentifier(name) && name.originalKeywordKind === 97 /* ThisKeyword */)) {
-            transformFlags |= 3 /* AssertTypeScript */;
-        }
-        // If a parameter has an accessibility modifier, then it is TypeScript syntax.
-        if (modifierFlags & 92 /* ParameterPropertyModifier */) {
-            transformFlags |= 3 /* AssertTypeScript */ | 131072 /* ContainsParameterPropertyAssignments */;
+        // Returns true if the class or interface member given by the symbol is free of "this" references. The
+        // function may return false for symbols that are actually free of "this" references because it is not
+        // feasible to perform a complete analysis in all cases. In particular, property members with types
+        // inferred from their initializers and function members with inferred return types are conservatively
+        // assumed not to be free of "this" references.
+        function isIndependentMember(symbol) {
+            if (symbol.declarations && symbol.declarations.length === 1) {
+                var declaration = symbol.declarations[0];
+                if (declaration) {
+                    switch (declaration.kind) {
+                        case 149 /* PropertyDeclaration */:
+                        case 148 /* PropertySignature */:
+                            return isIndependentVariableLikeDeclaration(declaration);
+                        case 151 /* MethodDeclaration */:
+                        case 150 /* MethodSignature */:
+                        case 152 /* Constructor */:
+                            return isIndependentFunctionLikeDeclaration(declaration);
+                    }
+                }
+            }
+            return false;
         }
-        // If a parameter has an initializer, a binding pattern or a dotDotDot token, then
-        // it is ES6 syntax and its container must emit default value assignments or parameter destructuring downlevel.
-        if (subtreeFlags & 2097152 /* ContainsBindingPattern */ || initializer || dotDotDotToken) {
-            transformFlags |= 192 /* AssertES6 */ | 65536 /* ContainsDefaultValueAssignments */;
+        function createSymbolTable(symbols) {
+            var result = ts.createMap();
+            for (var _i = 0, symbols_1 = symbols; _i < symbols_1.length; _i++) {
+                var symbol = symbols_1[_i];
+                result.set(symbol.name, symbol);
+            }
+            return result;
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~538968917 /* ParameterExcludes */;
-    }
-    function computeParenthesizedExpression(node, subtreeFlags) {
-        var transformFlags = subtreeFlags;
-        var expression = node.expression;
-        var expressionKind = expression.kind;
-        var expressionTransformFlags = expression.transformFlags;
-        // If the node is synthesized, it means the emitter put the parentheses there,
-        // not the user. If we didn't want them, the emitter would not have put them
-        // there.
-        if (expressionKind === 195 /* AsExpression */
-            || expressionKind === 177 /* TypeAssertionExpression */) {
-            transformFlags |= 3 /* AssertTypeScript */;
+        // The mappingThisOnly flag indicates that the only type parameter being mapped is "this". When the flag is true,
+        // we check symbols to see if we can quickly conclude they are free of "this" references, thus needing no instantiation.
+        function createInstantiatedSymbolTable(symbols, mapper, mappingThisOnly) {
+            var result = ts.createMap();
+            for (var _i = 0, symbols_2 = symbols; _i < symbols_2.length; _i++) {
+                var symbol = symbols_2[_i];
+                result.set(symbol.name, mappingThisOnly && isIndependentMember(symbol) ? symbol : instantiateSymbol(symbol, mapper));
+            }
+            return result;
         }
-        // If the expression of a ParenthesizedExpression is a destructuring assignment,
-        // then the ParenthesizedExpression is a destructuring assignment.
-        if (expressionTransformFlags & 256 /* DestructuringAssignment */) {
-            transformFlags |= 256 /* DestructuringAssignment */;
+        function addInheritedMembers(symbols, baseSymbols) {
+            for (var _i = 0, baseSymbols_1 = baseSymbols; _i < baseSymbols_1.length; _i++) {
+                var s = baseSymbols_1[_i];
+                if (!symbols.has(s.name)) {
+                    symbols.set(s.name, s);
+                }
+            }
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~536871765 /* NodeExcludes */;
-    }
-    function computeClassDeclaration(node, subtreeFlags) {
-        var transformFlags;
-        var modifierFlags = ts.getModifierFlags(node);
-        if (modifierFlags & 2 /* Ambient */) {
-            // An ambient declaration is TypeScript syntax.
-            transformFlags = 3 /* AssertTypeScript */;
+        function resolveDeclaredMembers(type) {
+            if (!type.declaredProperties) {
+                var symbol = type.symbol;
+                type.declaredProperties = getNamedMembers(symbol.members);
+                type.declaredCallSignatures = getSignaturesOfSymbol(symbol.members.get("__call"));
+                type.declaredConstructSignatures = getSignaturesOfSymbol(symbol.members.get("__new"));
+                type.declaredStringIndexInfo = getIndexInfoOfSymbol(symbol, 0 /* String */);
+                type.declaredNumberIndexInfo = getIndexInfoOfSymbol(symbol, 1 /* Number */);
+            }
+            return type;
         }
-        else {
-            // A ClassDeclaration is ES6 syntax.
-            transformFlags = subtreeFlags | 192 /* AssertES6 */;
-            // A class with a parameter property assignment, property initializer, or decorator is
-            // TypeScript syntax.
-            // An exported declaration may be TypeScript syntax.
-            if ((subtreeFlags & 137216 /* TypeScriptClassSyntaxMask */)
-                || (modifierFlags & 1 /* Export */)) {
-                transformFlags |= 3 /* AssertTypeScript */;
+        function getTypeWithThisArgument(type, thisArgument) {
+            if (getObjectFlags(type) & 4 /* Reference */) {
+                var target = type.target;
+                var typeArguments = type.typeArguments;
+                if (ts.length(target.typeParameters) === ts.length(typeArguments)) {
+                    return createTypeReference(target, ts.concatenate(typeArguments, [thisArgument || target.thisType]));
+                }
             }
-            if (subtreeFlags & 32768 /* ContainsLexicalThisInComputedPropertyName */) {
-                // A computed property name containing `this` might need to be rewritten,
-                // so propagate the ContainsLexicalThis flag upward.
-                transformFlags |= 8192 /* ContainsLexicalThis */;
+            else if (type.flags & 131072 /* Intersection */) {
+                return getIntersectionType(ts.map(type.types, function (t) { return getTypeWithThisArgument(t, thisArgument); }));
             }
+            return type;
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~537590613 /* ClassExcludes */;
-    }
-    function computeClassExpression(node, subtreeFlags) {
-        // A ClassExpression is ES6 syntax.
-        var transformFlags = subtreeFlags | 192 /* AssertES6 */;
-        // A class with a parameter property assignment, property initializer, or decorator is
-        // TypeScript syntax.
-        if (subtreeFlags & 137216 /* TypeScriptClassSyntaxMask */) {
-            transformFlags |= 3 /* AssertTypeScript */;
-        }
-        if (subtreeFlags & 32768 /* ContainsLexicalThisInComputedPropertyName */) {
-            // A computed property name containing `this` might need to be rewritten,
-            // so propagate the ContainsLexicalThis flag upward.
-            transformFlags |= 8192 /* ContainsLexicalThis */;
-        }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~537590613 /* ClassExcludes */;
-    }
-    function computeHeritageClause(node, subtreeFlags) {
-        var transformFlags = subtreeFlags;
-        switch (node.token) {
-            case 83 /* ExtendsKeyword */:
-                // An `extends` HeritageClause is ES6 syntax.
-                transformFlags |= 192 /* AssertES6 */;
-                break;
-            case 106 /* ImplementsKeyword */:
-                // An `implements` HeritageClause is TypeScript syntax.
-                transformFlags |= 3 /* AssertTypeScript */;
-                break;
-            default:
-                ts.Debug.fail("Unexpected token for heritage clause");
-                break;
-        }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~536871765 /* NodeExcludes */;
-    }
-    function computeExpressionWithTypeArguments(node, subtreeFlags) {
-        // An ExpressionWithTypeArguments is ES6 syntax, as it is used in the
-        // extends clause of a class.
-        var transformFlags = subtreeFlags | 192 /* AssertES6 */;
-        // If an ExpressionWithTypeArguments contains type arguments, then it
-        // is TypeScript syntax.
-        if (node.typeArguments) {
-            transformFlags |= 3 /* AssertTypeScript */;
-        }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~536871765 /* NodeExcludes */;
-    }
-    function computeConstructor(node, subtreeFlags) {
-        var transformFlags = subtreeFlags;
-        var body = node.body;
-        if (body === undefined) {
-            // An overload constructor is TypeScript syntax.
-            transformFlags |= 3 /* AssertTypeScript */;
-        }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~550593365 /* ConstructorExcludes */;
-    }
-    function computeMethod(node, subtreeFlags) {
-        // A MethodDeclaration is ES6 syntax.
-        var transformFlags = subtreeFlags | 192 /* AssertES6 */;
-        var modifierFlags = ts.getModifierFlags(node);
-        var body = node.body;
-        var typeParameters = node.typeParameters;
-        var asteriskToken = node.asteriskToken;
-        // A MethodDeclaration is TypeScript syntax if it is either async, abstract, overloaded,
-        // generic, or has a decorator.
-        if (!body
-            || typeParameters
-            || (modifierFlags & (256 /* Async */ | 128 /* Abstract */))
-            || (subtreeFlags & 2048 /* ContainsDecorators */)) {
-            transformFlags |= 3 /* AssertTypeScript */;
+        function resolveObjectTypeMembers(type, source, typeParameters, typeArguments) {
+            var mapper;
+            var members;
+            var callSignatures;
+            var constructSignatures;
+            var stringIndexInfo;
+            var numberIndexInfo;
+            if (ts.rangeEquals(typeParameters, typeArguments, 0, typeParameters.length)) {
+                mapper = identityMapper;
+                members = source.symbol ? source.symbol.members : createSymbolTable(source.declaredProperties);
+                callSignatures = source.declaredCallSignatures;
+                constructSignatures = source.declaredConstructSignatures;
+                stringIndexInfo = source.declaredStringIndexInfo;
+                numberIndexInfo = source.declaredNumberIndexInfo;
+            }
+            else {
+                mapper = createTypeMapper(typeParameters, typeArguments);
+                members = createInstantiatedSymbolTable(source.declaredProperties, mapper, /*mappingThisOnly*/ typeParameters.length === 1);
+                callSignatures = instantiateSignatures(source.declaredCallSignatures, mapper);
+                constructSignatures = instantiateSignatures(source.declaredConstructSignatures, mapper);
+                stringIndexInfo = instantiateIndexInfo(source.declaredStringIndexInfo, mapper);
+                numberIndexInfo = instantiateIndexInfo(source.declaredNumberIndexInfo, mapper);
+            }
+            var baseTypes = getBaseTypes(source);
+            if (baseTypes.length) {
+                if (source.symbol && members === source.symbol.members) {
+                    members = createSymbolTable(source.declaredProperties);
+                }
+                var thisArgument = ts.lastOrUndefined(typeArguments);
+                for (var _i = 0, baseTypes_1 = baseTypes; _i < baseTypes_1.length; _i++) {
+                    var baseType = baseTypes_1[_i];
+                    var instantiatedBaseType = thisArgument ? getTypeWithThisArgument(instantiateType(baseType, mapper), thisArgument) : baseType;
+                    addInheritedMembers(members, getPropertiesOfType(instantiatedBaseType));
+                    callSignatures = ts.concatenate(callSignatures, getSignaturesOfType(instantiatedBaseType, 0 /* Call */));
+                    constructSignatures = ts.concatenate(constructSignatures, getSignaturesOfType(instantiatedBaseType, 1 /* Construct */));
+                    if (!stringIndexInfo) {
+                        stringIndexInfo = instantiatedBaseType === anyType ?
+                            createIndexInfo(anyType, /*isReadonly*/ false) :
+                            getIndexInfoOfType(instantiatedBaseType, 0 /* String */);
+                    }
+                    numberIndexInfo = numberIndexInfo || getIndexInfoOfType(instantiatedBaseType, 1 /* Number */);
+                }
+            }
+            setStructuredTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
         }
-        // Currently, we only support generators that were originally async function bodies.
-        if (asteriskToken && ts.getEmitFlags(node) & 2097152 /* AsyncFunctionBody */) {
-            transformFlags |= 1536 /* AssertGenerator */;
+        function resolveClassOrInterfaceMembers(type) {
+            resolveObjectTypeMembers(type, resolveDeclaredMembers(type), emptyArray, emptyArray);
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~550593365 /* MethodOrAccessorExcludes */;
-    }
-    function computeAccessor(node, subtreeFlags) {
-        var transformFlags = subtreeFlags;
-        var modifierFlags = ts.getModifierFlags(node);
-        var body = node.body;
-        // A MethodDeclaration is TypeScript syntax if it is either async, abstract, overloaded,
-        // generic, or has a decorator.
-        if (!body
-            || (modifierFlags & (256 /* Async */ | 128 /* Abstract */))
-            || (subtreeFlags & 2048 /* ContainsDecorators */)) {
-            transformFlags |= 3 /* AssertTypeScript */;
+        function resolveTypeReferenceMembers(type) {
+            var source = resolveDeclaredMembers(type.target);
+            var typeParameters = ts.concatenate(source.typeParameters, [source.thisType]);
+            var typeArguments = type.typeArguments && type.typeArguments.length === typeParameters.length ?
+                type.typeArguments : ts.concatenate(type.typeArguments, [type]);
+            resolveObjectTypeMembers(type, source, typeParameters, typeArguments);
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~550593365 /* MethodOrAccessorExcludes */;
-    }
-    function computePropertyDeclaration(node, subtreeFlags) {
-        // A PropertyDeclaration is TypeScript syntax.
-        var transformFlags = subtreeFlags | 3 /* AssertTypeScript */;
-        // If the PropertyDeclaration has an initializer, we need to inform its ancestor
-        // so that it handle the transformation.
-        if (node.initializer) {
-            transformFlags |= 4096 /* ContainsPropertyInitializer */;
+        function createSignature(declaration, typeParameters, thisParameter, parameters, resolvedReturnType, typePredicate, minArgumentCount, hasRestParameter, hasLiteralTypes) {
+            var sig = new Signature(checker);
+            sig.declaration = declaration;
+            sig.typeParameters = typeParameters;
+            sig.parameters = parameters;
+            sig.thisParameter = thisParameter;
+            sig.resolvedReturnType = resolvedReturnType;
+            sig.typePredicate = typePredicate;
+            sig.minArgumentCount = minArgumentCount;
+            sig.hasRestParameter = hasRestParameter;
+            sig.hasLiteralTypes = hasLiteralTypes;
+            return sig;
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~536871765 /* NodeExcludes */;
-    }
-    function computeFunctionDeclaration(node, subtreeFlags) {
-        var transformFlags;
-        var modifierFlags = ts.getModifierFlags(node);
-        var body = node.body;
-        var asteriskToken = node.asteriskToken;
-        if (!body || (modifierFlags & 2 /* Ambient */)) {
-            // An ambient declaration is TypeScript syntax.
-            // A FunctionDeclaration without a body is an overload and is TypeScript syntax.
-            transformFlags = 3 /* AssertTypeScript */;
+        function cloneSignature(sig) {
+            return createSignature(sig.declaration, sig.typeParameters, sig.thisParameter, sig.parameters, sig.resolvedReturnType, sig.typePredicate, sig.minArgumentCount, sig.hasRestParameter, sig.hasLiteralTypes);
         }
-        else {
-            transformFlags = subtreeFlags | 8388608 /* ContainsHoistedDeclarationOrCompletion */;
-            // If a FunctionDeclaration is exported, then it is either ES6 or TypeScript syntax.
-            if (modifierFlags & 1 /* Export */) {
-                transformFlags |= 3 /* AssertTypeScript */ | 192 /* AssertES6 */;
+        function getDefaultConstructSignatures(classType) {
+            var baseConstructorType = getBaseConstructorTypeOfClass(classType);
+            var baseSignatures = getSignaturesOfType(baseConstructorType, 1 /* Construct */);
+            if (baseSignatures.length === 0) {
+                return [createSignature(undefined, classType.localTypeParameters, undefined, emptyArray, classType, /*typePredicate*/ undefined, 0, /*hasRestParameter*/ false, /*hasLiteralTypes*/ false)];
             }
-            // If a FunctionDeclaration is async, then it is TypeScript syntax.
-            if (modifierFlags & 256 /* Async */) {
-                transformFlags |= 3 /* AssertTypeScript */;
+            var baseTypeNode = getBaseTypeNodeOfClass(classType);
+            var isJavaScript = ts.isInJavaScriptFile(baseTypeNode);
+            var typeArguments = typeArgumentsFromTypeReferenceNode(baseTypeNode);
+            var typeArgCount = ts.length(typeArguments);
+            var result = [];
+            for (var _i = 0, baseSignatures_1 = baseSignatures; _i < baseSignatures_1.length; _i++) {
+                var baseSig = baseSignatures_1[_i];
+                var minTypeArgumentCount = getMinTypeArgumentCount(baseSig.typeParameters);
+                var typeParamCount = ts.length(baseSig.typeParameters);
+                if ((isJavaScript || typeArgCount >= minTypeArgumentCount) && typeArgCount <= typeParamCount) {
+                    var sig = typeParamCount ? createSignatureInstantiation(baseSig, fillMissingTypeArguments(typeArguments, baseSig.typeParameters, minTypeArgumentCount, baseTypeNode)) : cloneSignature(baseSig);
+                    sig.typeParameters = classType.localTypeParameters;
+                    sig.resolvedReturnType = classType;
+                    result.push(sig);
+                }
             }
-            // If a FunctionDeclaration's subtree has marked the container as needing to capture the
-            // lexical this, or the function contains parameters with initializers, then this node is
-            // ES6 syntax.
-            if (subtreeFlags & 81920 /* ES6FunctionSyntaxMask */) {
-                transformFlags |= 192 /* AssertES6 */;
+            return result;
+        }
+        function findMatchingSignature(signatureList, signature, partialMatch, ignoreThisTypes, ignoreReturnTypes) {
+            for (var _i = 0, signatureList_1 = signatureList; _i < signatureList_1.length; _i++) {
+                var s = signatureList_1[_i];
+                if (compareSignaturesIdentical(s, signature, partialMatch, ignoreThisTypes, ignoreReturnTypes, compareTypesIdentical)) {
+                    return s;
+                }
+            }
+        }
+        function findMatchingSignatures(signatureLists, signature, listIndex) {
+            if (signature.typeParameters) {
+                // We require an exact match for generic signatures, so we only return signatures from the first
+                // signature list and only if they have exact matches in the other signature lists.
+                if (listIndex > 0) {
+                    return undefined;
+                }
+                for (var i = 1; i < signatureLists.length; i++) {
+                    if (!findMatchingSignature(signatureLists[i], signature, /*partialMatch*/ false, /*ignoreThisTypes*/ false, /*ignoreReturnTypes*/ false)) {
+                        return undefined;
+                    }
+                }
+                return [signature];
             }
-            // If a FunctionDeclaration is generator function and is the body of a
-            // transformed async function, then this node can be transformed to a
-            // down-level generator.
-            // Currently we do not support transforming any other generator fucntions
-            // down level.
-            if (asteriskToken && ts.getEmitFlags(node) & 2097152 /* AsyncFunctionBody */) {
-                transformFlags |= 1536 /* AssertGenerator */;
+            var result = undefined;
+            for (var i = 0; i < signatureLists.length; i++) {
+                // Allow matching non-generic signatures to have excess parameters and different return types
+                var match = i === listIndex ? signature : findMatchingSignature(signatureLists[i], signature, /*partialMatch*/ true, /*ignoreThisTypes*/ true, /*ignoreReturnTypes*/ true);
+                if (!match) {
+                    return undefined;
+                }
+                if (!ts.contains(result, match)) {
+                    (result || (result = [])).push(match);
+                }
             }
+            return result;
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~550726485 /* FunctionExcludes */;
-    }
-    function computeFunctionExpression(node, subtreeFlags) {
-        var transformFlags = subtreeFlags;
-        var modifierFlags = ts.getModifierFlags(node);
-        var asteriskToken = node.asteriskToken;
-        // An async function expression is TypeScript syntax.
-        if (modifierFlags & 256 /* Async */) {
-            transformFlags |= 3 /* AssertTypeScript */;
+        // The signatures of a union type are those signatures that are present in each of the constituent types.
+        // Generic signatures must match exactly, but non-generic signatures are allowed to have extra optional
+        // parameters and may differ in return types. When signatures differ in return types, the resulting return
+        // type is the union of the constituent return types.
+        function getUnionSignatures(types, kind) {
+            var signatureLists = ts.map(types, function (t) { return getSignaturesOfType(t, kind); });
+            var result = undefined;
+            for (var i = 0; i < signatureLists.length; i++) {
+                for (var _i = 0, _a = signatureLists[i]; _i < _a.length; _i++) {
+                    var signature = _a[_i];
+                    // Only process signatures with parameter lists that aren't already in the result list
+                    if (!result || !findMatchingSignature(result, signature, /*partialMatch*/ false, /*ignoreThisTypes*/ true, /*ignoreReturnTypes*/ true)) {
+                        var unionSignatures = findMatchingSignatures(signatureLists, signature, i);
+                        if (unionSignatures) {
+                            var s = signature;
+                            // Union the result types when more than one signature matches
+                            if (unionSignatures.length > 1) {
+                                s = cloneSignature(signature);
+                                if (ts.forEach(unionSignatures, function (sig) { return sig.thisParameter; })) {
+                                    var thisType = getUnionType(ts.map(unionSignatures, function (sig) { return getTypeOfSymbol(sig.thisParameter) || anyType; }), /*subtypeReduction*/ true);
+                                    s.thisParameter = createSymbolWithType(signature.thisParameter, thisType);
+                                }
+                                // Clear resolved return type we possibly got from cloneSignature
+                                s.resolvedReturnType = undefined;
+                                s.unionSignatures = unionSignatures;
+                            }
+                            (result || (result = [])).push(s);
+                        }
+                    }
+                }
+            }
+            return result || emptyArray;
         }
-        // If a FunctionExpression's subtree has marked the container as needing to capture the
-        // lexical this, or the function contains parameters with initializers, then this node is
-        // ES6 syntax.
-        if (subtreeFlags & 81920 /* ES6FunctionSyntaxMask */) {
-            transformFlags |= 192 /* AssertES6 */;
+        function getUnionIndexInfo(types, kind) {
+            var indexTypes = [];
+            var isAnyReadonly = false;
+            for (var _i = 0, types_1 = types; _i < types_1.length; _i++) {
+                var type = types_1[_i];
+                var indexInfo = getIndexInfoOfType(type, kind);
+                if (!indexInfo) {
+                    return undefined;
+                }
+                indexTypes.push(indexInfo.type);
+                isAnyReadonly = isAnyReadonly || indexInfo.isReadonly;
+            }
+            return createIndexInfo(getUnionType(indexTypes, /*subtypeReduction*/ true), isAnyReadonly);
         }
-        // If a FunctionExpression is generator function and is the body of a
-        // transformed async function, then this node can be transformed to a
-        // down-level generator.
-        // Currently we do not support transforming any other generator fucntions
-        // down level.
-        if (asteriskToken && ts.getEmitFlags(node) & 2097152 /* AsyncFunctionBody */) {
-            transformFlags |= 1536 /* AssertGenerator */;
+        function resolveUnionTypeMembers(type) {
+            // The members and properties collections are empty for union types. To get all properties of a union
+            // type use getPropertiesOfType (only the language service uses this).
+            var callSignatures = getUnionSignatures(type.types, 0 /* Call */);
+            var constructSignatures = getUnionSignatures(type.types, 1 /* Construct */);
+            var stringIndexInfo = getUnionIndexInfo(type.types, 0 /* String */);
+            var numberIndexInfo = getUnionIndexInfo(type.types, 1 /* Number */);
+            setStructuredTypeMembers(type, emptySymbols, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~550726485 /* FunctionExcludes */;
-    }
-    function computeArrowFunction(node, subtreeFlags) {
-        // An ArrowFunction is ES6 syntax, and excludes markers that should not escape the scope of an ArrowFunction.
-        var transformFlags = subtreeFlags | 192 /* AssertES6 */;
-        var modifierFlags = ts.getModifierFlags(node);
-        // An async arrow function is TypeScript syntax.
-        if (modifierFlags & 256 /* Async */) {
-            transformFlags |= 3 /* AssertTypeScript */;
+        function intersectTypes(type1, type2) {
+            return !type1 ? type2 : !type2 ? type1 : getIntersectionType([type1, type2]);
         }
-        // If an ArrowFunction contains a lexical this, its container must capture the lexical this.
-        if (subtreeFlags & 8192 /* ContainsLexicalThis */) {
-            transformFlags |= 16384 /* ContainsCapturedLexicalThis */;
+        function intersectIndexInfos(info1, info2) {
+            return !info1 ? info2 : !info2 ? info1 : createIndexInfo(getIntersectionType([info1.type, info2.type]), info1.isReadonly && info2.isReadonly);
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~550710101 /* ArrowFunctionExcludes */;
-    }
-    function computePropertyAccess(node, subtreeFlags) {
-        var transformFlags = subtreeFlags;
-        var expression = node.expression;
-        var expressionKind = expression.kind;
-        // If a PropertyAccessExpression starts with a super keyword, then it is
-        // ES6 syntax, and requires a lexical `this` binding.
-        if (expressionKind === 95 /* SuperKeyword */) {
-            transformFlags |= 8192 /* ContainsLexicalThis */;
+        function unionSpreadIndexInfos(info1, info2) {
+            return info1 && info2 && createIndexInfo(getUnionType([info1.type, info2.type]), info1.isReadonly || info2.isReadonly);
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~536871765 /* NodeExcludes */;
-    }
-    function computeVariableDeclaration(node, subtreeFlags) {
-        var transformFlags = subtreeFlags;
-        var nameKind = node.name.kind;
-        // A VariableDeclaration with a binding pattern is ES6 syntax.
-        if (nameKind === 167 /* ObjectBindingPattern */ || nameKind === 168 /* ArrayBindingPattern */) {
-            transformFlags |= 192 /* AssertES6 */ | 2097152 /* ContainsBindingPattern */;
+        function includeMixinType(type, types, index) {
+            var mixedTypes = [];
+            for (var i = 0; i < types.length; i++) {
+                if (i === index) {
+                    mixedTypes.push(type);
+                }
+                else if (isMixinConstructorType(types[i])) {
+                    mixedTypes.push(getReturnTypeOfSignature(getSignaturesOfType(types[i], 1 /* Construct */)[0]));
+                }
+            }
+            return getIntersectionType(mixedTypes);
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~536871765 /* NodeExcludes */;
-    }
-    function computeVariableStatement(node, subtreeFlags) {
-        var transformFlags;
-        var modifierFlags = ts.getModifierFlags(node);
-        var declarationListTransformFlags = node.declarationList.transformFlags;
-        // An ambient declaration is TypeScript syntax.
-        if (modifierFlags & 2 /* Ambient */) {
-            transformFlags = 3 /* AssertTypeScript */;
+        function resolveIntersectionTypeMembers(type) {
+            // The members and properties collections are empty for intersection types. To get all properties of an
+            // intersection type use getPropertiesOfType (only the language service uses this).
+            var callSignatures = emptyArray;
+            var constructSignatures = emptyArray;
+            var stringIndexInfo;
+            var numberIndexInfo;
+            var types = type.types;
+            var mixinCount = ts.countWhere(types, isMixinConstructorType);
+            var _loop_3 = function (i) {
+                var t = type.types[i];
+                // When an intersection type contains mixin constructor types, the construct signatures from
+                // those types are discarded and their return types are mixed into the return types of all
+                // other construct signatures in the intersection type. For example, the intersection type
+                // '{ new(...args: any[]) => A } & { new(s: string) => B }' has a single construct signature
+                // 'new(s: string) => A & B'.
+                if (mixinCount === 0 || mixinCount === types.length && i === 0 || !isMixinConstructorType(t)) {
+                    var signatures = getSignaturesOfType(t, 1 /* Construct */);
+                    if (signatures.length && mixinCount > 0) {
+                        signatures = ts.map(signatures, function (s) {
+                            var clone = cloneSignature(s);
+                            clone.resolvedReturnType = includeMixinType(getReturnTypeOfSignature(s), types, i);
+                            return clone;
+                        });
+                    }
+                    constructSignatures = ts.concatenate(constructSignatures, signatures);
+                }
+                callSignatures = ts.concatenate(callSignatures, getSignaturesOfType(t, 0 /* Call */));
+                stringIndexInfo = intersectIndexInfos(stringIndexInfo, getIndexInfoOfType(t, 0 /* String */));
+                numberIndexInfo = intersectIndexInfos(numberIndexInfo, getIndexInfoOfType(t, 1 /* Number */));
+            };
+            for (var i = 0; i < types.length; i++) {
+                _loop_3(i);
+            }
+            setStructuredTypeMembers(type, emptySymbols, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
         }
-        else {
-            transformFlags = subtreeFlags;
-            // If a VariableStatement is exported, then it is either ES6 or TypeScript syntax.
-            if (modifierFlags & 1 /* Export */) {
-                transformFlags |= 192 /* AssertES6 */ | 3 /* AssertTypeScript */;
+        /**
+         * Converts an AnonymousType to a ResolvedType.
+         */
+        function resolveAnonymousTypeMembers(type) {
+            var symbol = type.symbol;
+            if (type.target) {
+                var members = createInstantiatedSymbolTable(getPropertiesOfObjectType(type.target), type.mapper, /*mappingThisOnly*/ false);
+                var callSignatures = instantiateSignatures(getSignaturesOfType(type.target, 0 /* Call */), type.mapper);
+                var constructSignatures = instantiateSignatures(getSignaturesOfType(type.target, 1 /* Construct */), type.mapper);
+                var stringIndexInfo = instantiateIndexInfo(getIndexInfoOfType(type.target, 0 /* String */), type.mapper);
+                var numberIndexInfo = instantiateIndexInfo(getIndexInfoOfType(type.target, 1 /* Number */), type.mapper);
+                setStructuredTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
             }
-            if (declarationListTransformFlags & 2097152 /* ContainsBindingPattern */) {
-                transformFlags |= 192 /* AssertES6 */;
+            else if (symbol.flags & 2048 /* TypeLiteral */) {
+                var members = symbol.members;
+                var callSignatures = getSignaturesOfSymbol(members.get("__call"));
+                var constructSignatures = getSignaturesOfSymbol(members.get("__new"));
+                var stringIndexInfo = getIndexInfoOfSymbol(symbol, 0 /* String */);
+                var numberIndexInfo = getIndexInfoOfSymbol(symbol, 1 /* Number */);
+                setStructuredTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+            }
+            else {
+                // Combinations of function, class, enum and module
+                var members = emptySymbols;
+                var constructSignatures = emptyArray;
+                var stringIndexInfo = undefined;
+                if (symbol.exports) {
+                    members = getExportsOfSymbol(symbol);
+                }
+                if (symbol.flags & 32 /* Class */) {
+                    var classType = getDeclaredTypeOfClassOrInterface(symbol);
+                    constructSignatures = getSignaturesOfSymbol(symbol.members.get("__constructor"));
+                    if (!constructSignatures.length) {
+                        constructSignatures = getDefaultConstructSignatures(classType);
+                    }
+                    var baseConstructorType = getBaseConstructorTypeOfClass(classType);
+                    if (baseConstructorType.flags & (32768 /* Object */ | 131072 /* Intersection */ | 540672 /* TypeVariable */)) {
+                        members = createSymbolTable(getNamedMembers(members));
+                        addInheritedMembers(members, getPropertiesOfType(baseConstructorType));
+                    }
+                    else if (baseConstructorType === anyType) {
+                        stringIndexInfo = createIndexInfo(anyType, /*isReadonly*/ false);
+                    }
+                }
+                var numberIndexInfo = symbol.flags & 384 /* Enum */ ? enumNumberIndexInfo : undefined;
+                setStructuredTypeMembers(type, members, emptyArray, constructSignatures, stringIndexInfo, numberIndexInfo);
+                // We resolve the members before computing the signatures because a signature may use
+                // typeof with a qualified name expression that circularly references the type we are
+                // in the process of resolving (see issue #6072). The temporarily empty signature list
+                // will never be observed because a qualified name can't reference signatures.
+                if (symbol.flags & (16 /* Function */ | 8192 /* Method */)) {
+                    type.callSignatures = getSignaturesOfSymbol(symbol);
+                }
             }
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~536871765 /* NodeExcludes */;
-    }
-    function computeLabeledStatement(node, subtreeFlags) {
-        var transformFlags = subtreeFlags;
-        // A labeled statement containing a block scoped binding *may* need to be transformed from ES6.
-        if (subtreeFlags & 1048576 /* ContainsBlockScopedBinding */
-            && ts.isIterationStatement(node, /*lookInLabeledStatements*/ true)) {
-            transformFlags |= 192 /* AssertES6 */;
-        }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~536871765 /* NodeExcludes */;
-    }
-    function computeImportEquals(node, subtreeFlags) {
-        var transformFlags = subtreeFlags;
-        // An ImportEqualsDeclaration with a namespace reference is TypeScript.
-        if (!ts.isExternalModuleImportEqualsDeclaration(node)) {
-            transformFlags |= 3 /* AssertTypeScript */;
-        }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~536871765 /* NodeExcludes */;
-    }
-    function computeExpressionStatement(node, subtreeFlags) {
-        var transformFlags = subtreeFlags;
-        // If the expression of an expression statement is a destructuring assignment,
-        // then we treat the statement as ES6 so that we can indicate that we do not
-        // need to hold on to the right-hand side.
-        if (node.expression.transformFlags & 256 /* DestructuringAssignment */) {
-            transformFlags |= 192 /* AssertES6 */;
+        /** Resolve the members of a mapped type { [P in K]: T } */
+        function resolveMappedTypeMembers(type) {
+            var members = ts.createMap();
+            var stringIndexInfo;
+            // Resolve upfront such that recursive references see an empty object type.
+            setStructuredTypeMembers(type, emptySymbols, emptyArray, emptyArray, undefined, undefined);
+            // In { [P in K]: T }, we refer to P as the type parameter type, K as the constraint type,
+            // and T as the template type.
+            var typeParameter = getTypeParameterFromMappedType(type);
+            var constraintType = getConstraintTypeFromMappedType(type);
+            var templateType = getTemplateTypeFromMappedType(type);
+            var modifiersType = getApparentType(getModifiersTypeFromMappedType(type)); // The 'T' in 'keyof T'
+            var templateReadonly = !!type.declaration.readonlyToken;
+            var templateOptional = !!type.declaration.questionToken;
+            if (type.declaration.typeParameter.constraint.kind === 170 /* TypeOperator */) {
+                // We have a { [P in keyof T]: X }
+                for (var _i = 0, _a = getPropertiesOfType(modifiersType); _i < _a.length; _i++) {
+                    var propertySymbol = _a[_i];
+                    addMemberForKeyType(getLiteralTypeFromPropertyName(propertySymbol), propertySymbol);
+                }
+                if (getIndexInfoOfType(modifiersType, 0 /* String */)) {
+                    addMemberForKeyType(stringType);
+                }
+            }
+            else {
+                // First, if the constraint type is a type parameter, obtain the base constraint. Then,
+                // if the key type is a 'keyof X', obtain 'keyof C' where C is the base constraint of X.
+                // Finally, iterate over the constituents of the resulting iteration type.
+                var keyType = constraintType.flags & 540672 /* TypeVariable */ ? getApparentType(constraintType) : constraintType;
+                var iterationType = keyType.flags & 262144 /* Index */ ? getIndexType(getApparentType(keyType.type)) : keyType;
+                forEachType(iterationType, addMemberForKeyType);
+            }
+            setStructuredTypeMembers(type, members, emptyArray, emptyArray, stringIndexInfo, undefined);
+            function addMemberForKeyType(t, propertySymbol) {
+                // Create a mapper from T to the current iteration type constituent. Then, if the
+                // mapped type is itself an instantiated type, combine the iteration mapper with the
+                // instantiation mapper.
+                var iterationMapper = createTypeMapper([typeParameter], [t]);
+                var templateMapper = type.mapper ? combineTypeMappers(type.mapper, iterationMapper) : iterationMapper;
+                var propType = instantiateType(templateType, templateMapper);
+                // If the current iteration type constituent is a string literal type, create a property.
+                // Otherwise, for type string create a string index signature.
+                if (t.flags & 32 /* StringLiteral */) {
+                    var propName = t.value;
+                    var modifiersProp = getPropertyOfType(modifiersType, propName);
+                    var isOptional = templateOptional || !!(modifiersProp && modifiersProp.flags & 67108864 /* Optional */);
+                    var prop = createSymbol(4 /* Property */ | (isOptional ? 67108864 /* Optional */ : 0), propName);
+                    prop.checkFlags = templateReadonly || modifiersProp && isReadonlySymbol(modifiersProp) ? 8 /* Readonly */ : 0;
+                    prop.type = propType;
+                    if (propertySymbol) {
+                        prop.syntheticOrigin = propertySymbol;
+                        prop.declarations = propertySymbol.declarations;
+                    }
+                    members.set(propName, prop);
+                }
+                else if (t.flags & 2 /* String */) {
+                    stringIndexInfo = createIndexInfo(propType, templateReadonly);
+                }
+            }
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~536871765 /* NodeExcludes */;
-    }
-    function computeModuleDeclaration(node, subtreeFlags) {
-        var transformFlags = 3 /* AssertTypeScript */;
-        var modifierFlags = ts.getModifierFlags(node);
-        if ((modifierFlags & 2 /* Ambient */) === 0) {
-            transformFlags |= subtreeFlags;
+        function getTypeParameterFromMappedType(type) {
+            return type.typeParameter ||
+                (type.typeParameter = getDeclaredTypeOfTypeParameter(getSymbolOfNode(type.declaration.typeParameter)));
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~546335573 /* ModuleExcludes */;
-    }
-    function computeVariableDeclarationList(node, subtreeFlags) {
-        var transformFlags = subtreeFlags | 8388608 /* ContainsHoistedDeclarationOrCompletion */;
-        if (subtreeFlags & 2097152 /* ContainsBindingPattern */) {
-            transformFlags |= 192 /* AssertES6 */;
+        function getConstraintTypeFromMappedType(type) {
+            return type.constraintType ||
+                (type.constraintType = instantiateType(getConstraintOfTypeParameter(getTypeParameterFromMappedType(type)), type.mapper || identityMapper) || unknownType);
         }
-        // If a VariableDeclarationList is `let` or `const`, then it is ES6 syntax.
-        if (node.flags & 3 /* BlockScoped */) {
-            transformFlags |= 192 /* AssertES6 */ | 1048576 /* ContainsBlockScopedBinding */;
+        function getTemplateTypeFromMappedType(type) {
+            return type.templateType ||
+                (type.templateType = type.declaration.type ?
+                    instantiateType(addOptionality(getTypeFromTypeNode(type.declaration.type), !!type.declaration.questionToken), type.mapper || identityMapper) :
+                    unknownType);
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~538968917 /* VariableDeclarationListExcludes */;
-    }
-    function computeOther(node, kind, subtreeFlags) {
-        // Mark transformations needed for each node
-        var transformFlags = subtreeFlags;
-        var excludeFlags = 536871765 /* NodeExcludes */;
-        switch (kind) {
-            case 112 /* PublicKeyword */:
-            case 110 /* PrivateKeyword */:
-            case 111 /* ProtectedKeyword */:
-            case 115 /* AbstractKeyword */:
-            case 122 /* DeclareKeyword */:
-            case 118 /* AsyncKeyword */:
-            case 74 /* ConstKeyword */:
-            case 184 /* AwaitExpression */:
-            case 224 /* EnumDeclaration */:
-            case 255 /* EnumMember */:
-            case 177 /* TypeAssertionExpression */:
-            case 195 /* AsExpression */:
-            case 196 /* NonNullExpression */:
-            case 128 /* ReadonlyKeyword */:
-                // These nodes are TypeScript syntax.
-                transformFlags |= 3 /* AssertTypeScript */;
-                break;
-            case 241 /* JsxElement */:
-            case 242 /* JsxSelfClosingElement */:
-            case 243 /* JsxOpeningElement */:
-            case 244 /* JsxText */:
-            case 245 /* JsxClosingElement */:
-            case 246 /* JsxAttribute */:
-            case 247 /* JsxSpreadAttribute */:
-            case 248 /* JsxExpression */:
-                // These nodes are Jsx syntax.
-                transformFlags |= 12 /* AssertJsx */;
-                break;
-            case 82 /* ExportKeyword */:
-                // This node is both ES6 and TypeScript syntax.
-                transformFlags |= 192 /* AssertES6 */ | 3 /* AssertTypeScript */;
-                break;
-            case 77 /* DefaultKeyword */:
-            case 11 /* NoSubstitutionTemplateLiteral */:
-            case 12 /* TemplateHead */:
-            case 13 /* TemplateMiddle */:
-            case 14 /* TemplateTail */:
-            case 189 /* TemplateExpression */:
-            case 176 /* TaggedTemplateExpression */:
-            case 254 /* ShorthandPropertyAssignment */:
-            case 208 /* ForOfStatement */:
-                // These nodes are ES6 syntax.
-                transformFlags |= 192 /* AssertES6 */;
-                break;
-            case 190 /* YieldExpression */:
-                // This node is ES6 syntax.
-                transformFlags |= 192 /* AssertES6 */ | 4194304 /* ContainsYield */;
-                break;
-            case 117 /* AnyKeyword */:
-            case 130 /* NumberKeyword */:
-            case 127 /* NeverKeyword */:
-            case 132 /* StringKeyword */:
-            case 120 /* BooleanKeyword */:
-            case 133 /* SymbolKeyword */:
-            case 103 /* VoidKeyword */:
-            case 141 /* TypeParameter */:
-            case 144 /* PropertySignature */:
-            case 146 /* MethodSignature */:
-            case 151 /* CallSignature */:
-            case 152 /* ConstructSignature */:
-            case 153 /* IndexSignature */:
-            case 154 /* TypePredicate */:
-            case 155 /* TypeReference */:
-            case 156 /* FunctionType */:
-            case 157 /* ConstructorType */:
-            case 158 /* TypeQuery */:
-            case 159 /* TypeLiteral */:
-            case 160 /* ArrayType */:
-            case 161 /* TupleType */:
-            case 162 /* UnionType */:
-            case 163 /* IntersectionType */:
-            case 164 /* ParenthesizedType */:
-            case 222 /* InterfaceDeclaration */:
-            case 223 /* TypeAliasDeclaration */:
-            case 165 /* ThisType */:
-            case 166 /* LiteralType */:
-                // Types and signatures are TypeScript syntax, and exclude all other facts.
-                transformFlags = 3 /* AssertTypeScript */;
-                excludeFlags = -3 /* TypeExcludes */;
-                break;
-            case 140 /* ComputedPropertyName */:
-                // Even though computed property names are ES6, we don't treat them as such.
-                // This is so that they can flow through PropertyName transforms unaffected.
-                // Instead, we mark the container as ES6, so that it can properly handle the transform.
-                transformFlags |= 524288 /* ContainsComputedPropertyName */;
-                if (subtreeFlags & 8192 /* ContainsLexicalThis */) {
-                    // A computed method name like `[this.getName()](x: string) { ... }` needs to
-                    // distinguish itself from the normal case of a method body containing `this`:
-                    // `this` inside a method doesn't need to be rewritten (the method provides `this`),
-                    // whereas `this` inside a computed name *might* need to be rewritten if the class/object
-                    // is inside an arrow function:
-                    // `_this = this; () => class K { [_this.getName()]() { ... } }`
-                    // To make this distinction, use ContainsLexicalThisInComputedPropertyName
-                    // instead of ContainsLexicalThis for computed property names
-                    transformFlags |= 32768 /* ContainsLexicalThisInComputedPropertyName */;
+        function getModifiersTypeFromMappedType(type) {
+            if (!type.modifiersType) {
+                var constraintDeclaration = type.declaration.typeParameter.constraint;
+                if (constraintDeclaration.kind === 170 /* TypeOperator */) {
+                    // If the constraint declaration is a 'keyof T' node, the modifiers type is T. We check
+                    // AST nodes here because, when T is a non-generic type, the logic below eagerly resolves
+                    // 'keyof T' to a literal union type and we can't recover T from that type.
+                    type.modifiersType = instantiateType(getTypeFromTypeNode(constraintDeclaration.type), type.mapper || identityMapper);
                 }
-                break;
-            case 191 /* SpreadElementExpression */:
-                // This node is ES6 syntax, but is handled by a containing node.
-                transformFlags |= 262144 /* ContainsSpreadElementExpression */;
-                break;
-            case 95 /* SuperKeyword */:
-                // This node is ES6 syntax.
-                transformFlags |= 192 /* AssertES6 */;
-                break;
-            case 97 /* ThisKeyword */:
-                // Mark this node and its ancestors as containing a lexical `this` keyword.
-                transformFlags |= 8192 /* ContainsLexicalThis */;
-                break;
-            case 167 /* ObjectBindingPattern */:
-            case 168 /* ArrayBindingPattern */:
-                // These nodes are ES6 syntax.
-                transformFlags |= 192 /* AssertES6 */ | 2097152 /* ContainsBindingPattern */;
-                break;
-            case 143 /* Decorator */:
-                // This node is TypeScript syntax, and marks its container as also being TypeScript syntax.
-                transformFlags |= 3 /* AssertTypeScript */ | 2048 /* ContainsDecorators */;
-                break;
-            case 171 /* ObjectLiteralExpression */:
-                excludeFlags = 537430869 /* ObjectLiteralExcludes */;
-                if (subtreeFlags & 524288 /* ContainsComputedPropertyName */) {
-                    // If an ObjectLiteralExpression contains a ComputedPropertyName, then it
-                    // is an ES6 node.
-                    transformFlags |= 192 /* AssertES6 */;
+                else {
+                    // Otherwise, get the declared constraint type, and if the constraint type is a type parameter,
+                    // get the constraint of that type parameter. If the resulting type is an indexed type 'keyof T',
+                    // the modifiers type is T. Otherwise, the modifiers type is {}.
+                    var declaredType = getTypeFromMappedTypeNode(type.declaration);
+                    var constraint = getConstraintTypeFromMappedType(declaredType);
+                    var extendedConstraint = constraint && constraint.flags & 16384 /* TypeParameter */ ? getConstraintOfTypeParameter(constraint) : constraint;
+                    type.modifiersType = extendedConstraint && extendedConstraint.flags & 262144 /* Index */ ? instantiateType(extendedConstraint.type, type.mapper || identityMapper) : emptyObjectType;
                 }
-                if (subtreeFlags & 32768 /* ContainsLexicalThisInComputedPropertyName */) {
-                    // A computed property name containing `this` might need to be rewritten,
-                    // so propagate the ContainsLexicalThis flag upward.
-                    transformFlags |= 8192 /* ContainsLexicalThis */;
+            }
+            return type.modifiersType;
+        }
+        function isGenericMappedType(type) {
+            if (getObjectFlags(type) & 32 /* Mapped */) {
+                var constraintType = getConstraintTypeFromMappedType(type);
+                return maybeTypeOfKind(constraintType, 540672 /* TypeVariable */ | 262144 /* Index */);
+            }
+            return false;
+        }
+        function resolveStructuredTypeMembers(type) {
+            if (!type.members) {
+                if (type.flags & 32768 /* Object */) {
+                    if (type.objectFlags & 4 /* Reference */) {
+                        resolveTypeReferenceMembers(type);
+                    }
+                    else if (type.objectFlags & 3 /* ClassOrInterface */) {
+                        resolveClassOrInterfaceMembers(type);
+                    }
+                    else if (type.objectFlags & 16 /* Anonymous */) {
+                        resolveAnonymousTypeMembers(type);
+                    }
+                    else if (type.objectFlags & 32 /* Mapped */) {
+                        resolveMappedTypeMembers(type);
+                    }
                 }
-                break;
-            case 170 /* ArrayLiteralExpression */:
-            case 175 /* NewExpression */:
-                excludeFlags = 537133909 /* ArrayLiteralOrCallOrNewExcludes */;
-                if (subtreeFlags & 262144 /* ContainsSpreadElementExpression */) {
-                    // If the this node contains a SpreadElementExpression, then it is an ES6
-                    // node.
-                    transformFlags |= 192 /* AssertES6 */;
+                else if (type.flags & 65536 /* Union */) {
+                    resolveUnionTypeMembers(type);
                 }
-                break;
-            case 204 /* DoStatement */:
-            case 205 /* WhileStatement */:
-            case 206 /* ForStatement */:
-            case 207 /* ForInStatement */:
-                // A loop containing a block scoped binding *may* need to be transformed from ES6.
-                if (subtreeFlags & 1048576 /* ContainsBlockScopedBinding */) {
-                    transformFlags |= 192 /* AssertES6 */;
+                else if (type.flags & 131072 /* Intersection */) {
+                    resolveIntersectionTypeMembers(type);
                 }
-                break;
-            case 256 /* SourceFile */:
-                if (subtreeFlags & 16384 /* ContainsCapturedLexicalThis */) {
-                    transformFlags |= 192 /* AssertES6 */;
+            }
+            return type;
+        }
+        /** Return properties of an object type or an empty array for other types */
+        function getPropertiesOfObjectType(type) {
+            if (type.flags & 32768 /* Object */) {
+                return resolveStructuredTypeMembers(type).properties;
+            }
+            return emptyArray;
+        }
+        /** If the given type is an object type and that type has a property by the given name,
+         * return the symbol for that property. Otherwise return undefined.
+         */
+        function getPropertyOfObjectType(type, name) {
+            if (type.flags & 32768 /* Object */) {
+                var resolved = resolveStructuredTypeMembers(type);
+                var symbol = resolved.members.get(name);
+                if (symbol && symbolIsValue(symbol)) {
+                    return symbol;
                 }
-                break;
-            case 211 /* ReturnStatement */:
-            case 209 /* ContinueStatement */:
-            case 210 /* BreakStatement */:
-                transformFlags |= 8388608 /* ContainsHoistedDeclarationOrCompletion */;
-                break;
+            }
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~excludeFlags;
-    }
-})(ts || (ts = {}));
-/// <reference path="core.ts" />
-/// <reference path="diagnosticInformationMap.generated.ts" />
-var ts;
-(function (ts) {
-    function trace(host, message) {
-        host.trace(ts.formatMessage.apply(undefined, arguments));
-    }
-    ts.trace = trace;
-    /* @internal */
-    function isTraceEnabled(compilerOptions, host) {
-        return compilerOptions.traceResolution && host.trace !== undefined;
-    }
-    ts.isTraceEnabled = isTraceEnabled;
-    /* @internal */
-    function createResolvedModule(resolvedFileName, isExternalLibraryImport, failedLookupLocations) {
-        return { resolvedModule: resolvedFileName ? { resolvedFileName: resolvedFileName, isExternalLibraryImport: isExternalLibraryImport } : undefined, failedLookupLocations: failedLookupLocations };
-    }
-    ts.createResolvedModule = createResolvedModule;
-    function moduleHasNonRelativeName(moduleName) {
-        return !(ts.isRootedDiskPath(moduleName) || ts.isExternalModuleNameRelative(moduleName));
-    }
-    function tryReadTypesSection(packageJsonPath, baseDirectory, state) {
-        var jsonContent = readJson(packageJsonPath, state.host);
-        function tryReadFromField(fieldName) {
-            if (ts.hasProperty(jsonContent, fieldName)) {
-                var typesFile = jsonContent[fieldName];
-                if (typeof typesFile === "string") {
-                    var typesFilePath_1 = ts.normalizePath(ts.combinePaths(baseDirectory, typesFile));
-                    if (state.traceEnabled) {
-                        trace(state.host, ts.Diagnostics.package_json_has_0_field_1_that_references_2, fieldName, typesFile, typesFilePath_1);
+        function getPropertiesOfUnionOrIntersectionType(type) {
+            if (!type.resolvedProperties) {
+                var members = ts.createMap();
+                for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                    var current = _a[_i];
+                    for (var _b = 0, _c = getPropertiesOfType(current); _b < _c.length; _b++) {
+                        var prop = _c[_b];
+                        if (!members.has(prop.name)) {
+                            var combinedProp = getPropertyOfUnionOrIntersectionType(type, prop.name);
+                            if (combinedProp) {
+                                members.set(prop.name, combinedProp);
+                            }
+                        }
                     }
-                    return typesFilePath_1;
-                }
-                else {
-                    if (state.traceEnabled) {
-                        trace(state.host, ts.Diagnostics.Expected_type_of_0_field_in_package_json_to_be_string_got_1, fieldName, typeof typesFile);
+                    // The properties of a union type are those that are present in all constituent types, so
+                    // we only need to check the properties of the first type
+                    if (type.flags & 65536 /* Union */) {
+                        break;
                     }
                 }
+                type.resolvedProperties = getNamedMembers(members);
             }
+            return type.resolvedProperties;
         }
-        var typesFilePath = tryReadFromField("typings") || tryReadFromField("types");
-        if (typesFilePath) {
-            return typesFilePath;
+        function getPropertiesOfType(type) {
+            type = getApparentType(type);
+            return type.flags & 196608 /* UnionOrIntersection */ ?
+                getPropertiesOfUnionOrIntersectionType(type) :
+                getPropertiesOfObjectType(type);
         }
-        // Use the main module for inferring types if no types package specified and the allowJs is set
-        if (state.compilerOptions.allowJs && jsonContent.main && typeof jsonContent.main === "string") {
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.No_types_specified_in_package_json_but_allowJs_is_set_so_returning_main_value_of_0, jsonContent.main);
+        function getAllPossiblePropertiesOfType(type) {
+            if (type.flags & 65536 /* Union */) {
+                var props = ts.createMap();
+                for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                    var memberType = _a[_i];
+                    if (memberType.flags & 8190 /* Primitive */) {
+                        continue;
+                    }
+                    for (var _b = 0, _c = getPropertiesOfType(memberType); _b < _c.length; _b++) {
+                        var name_19 = _c[_b].name;
+                        if (!props.has(name_19)) {
+                            props.set(name_19, createUnionOrIntersectionProperty(type, name_19));
+                        }
+                    }
+                }
+                return ts.arrayFrom(props.values());
+            }
+            else {
+                return getPropertiesOfType(type);
             }
-            var mainFilePath = ts.normalizePath(ts.combinePaths(baseDirectory, jsonContent.main));
-            return mainFilePath;
-        }
-        return undefined;
-    }
-    function readJson(path, host) {
-        try {
-            var jsonText = host.readFile(path);
-            return jsonText ? JSON.parse(jsonText) : {};
         }
-        catch (e) {
-            // gracefully handle if readFile fails or returns not JSON
-            return {};
+        function getConstraintOfType(type) {
+            return type.flags & 16384 /* TypeParameter */ ? getConstraintOfTypeParameter(type) :
+                type.flags & 524288 /* IndexedAccess */ ? getConstraintOfIndexedAccess(type) :
+                    getBaseConstraintOfType(type);
         }
-    }
-    var typeReferenceExtensions = [".d.ts"];
-    function getEffectiveTypeRoots(options, host) {
-        if (options.typeRoots) {
-            return options.typeRoots;
+        function getConstraintOfTypeParameter(typeParameter) {
+            return hasNonCircularBaseConstraint(typeParameter) ? getConstraintFromTypeParameter(typeParameter) : undefined;
         }
-        var currentDirectory;
-        if (options.configFilePath) {
-            currentDirectory = ts.getDirectoryPath(options.configFilePath);
+        function getConstraintOfIndexedAccess(type) {
+            var baseObjectType = getBaseConstraintOfType(type.objectType);
+            var baseIndexType = getBaseConstraintOfType(type.indexType);
+            return baseObjectType || baseIndexType ? getIndexedAccessType(baseObjectType || type.objectType, baseIndexType || type.indexType) : undefined;
         }
-        else if (host.getCurrentDirectory) {
-            currentDirectory = host.getCurrentDirectory();
+        function getBaseConstraintOfType(type) {
+            if (type.flags & (540672 /* TypeVariable */ | 196608 /* UnionOrIntersection */)) {
+                var constraint = getResolvedBaseConstraint(type);
+                if (constraint !== noConstraintType && constraint !== circularConstraintType) {
+                    return constraint;
+                }
+            }
+            else if (type.flags & 262144 /* Index */) {
+                return stringType;
+            }
+            return undefined;
         }
-        return currentDirectory && getDefaultTypeRoots(currentDirectory, host);
-    }
-    ts.getEffectiveTypeRoots = getEffectiveTypeRoots;
-    /**
-     * Returns the path to every node_modules/@types directory from some ancestor directory.
-     * Returns undefined if there are none.
-     */
-    function getDefaultTypeRoots(currentDirectory, host) {
-        if (!host.directoryExists) {
-            return [ts.combinePaths(currentDirectory, nodeModulesAtTypes)];
+        function hasNonCircularBaseConstraint(type) {
+            return getResolvedBaseConstraint(type) !== circularConstraintType;
         }
-        var typeRoots;
-        while (true) {
-            var atTypes = ts.combinePaths(currentDirectory, nodeModulesAtTypes);
-            if (host.directoryExists(atTypes)) {
-                (typeRoots || (typeRoots = [])).push(atTypes);
+        /**
+         * Return the resolved base constraint of a type variable. The noConstraintType singleton is returned if the
+         * type variable has no constraint, and the circularConstraintType singleton is returned if the constraint
+         * circularly references the type variable.
+         */
+        function getResolvedBaseConstraint(type) {
+            var typeStack;
+            var circular;
+            if (!type.resolvedBaseConstraint) {
+                typeStack = [];
+                var constraint = getBaseConstraint(type);
+                type.resolvedBaseConstraint = circular ? circularConstraintType : getTypeWithThisArgument(constraint || noConstraintType, type);
+            }
+            return type.resolvedBaseConstraint;
+            function getBaseConstraint(t) {
+                if (ts.contains(typeStack, t)) {
+                    circular = true;
+                    return undefined;
+                }
+                typeStack.push(t);
+                var result = computeBaseConstraint(t);
+                typeStack.pop();
+                return result;
             }
-            var parent_7 = ts.getDirectoryPath(currentDirectory);
-            if (parent_7 === currentDirectory) {
-                break;
+            function computeBaseConstraint(t) {
+                if (t.flags & 16384 /* TypeParameter */) {
+                    var constraint = getConstraintFromTypeParameter(t);
+                    return t.isThisType ? constraint :
+                        constraint ? getBaseConstraint(constraint) : undefined;
+                }
+                if (t.flags & 196608 /* UnionOrIntersection */) {
+                    var types = t.types;
+                    var baseTypes = [];
+                    for (var _i = 0, types_2 = types; _i < types_2.length; _i++) {
+                        var type_2 = types_2[_i];
+                        var baseType = getBaseConstraint(type_2);
+                        if (baseType) {
+                            baseTypes.push(baseType);
+                        }
+                    }
+                    return t.flags & 65536 /* Union */ && baseTypes.length === types.length ? getUnionType(baseTypes) :
+                        t.flags & 131072 /* Intersection */ && baseTypes.length ? getIntersectionType(baseTypes) :
+                            undefined;
+                }
+                if (t.flags & 262144 /* Index */) {
+                    return stringType;
+                }
+                if (t.flags & 524288 /* IndexedAccess */) {
+                    var baseObjectType = getBaseConstraint(t.objectType);
+                    var baseIndexType = getBaseConstraint(t.indexType);
+                    var baseIndexedAccess = baseObjectType && baseIndexType ? getIndexedAccessType(baseObjectType, baseIndexType) : undefined;
+                    return baseIndexedAccess && baseIndexedAccess !== unknownType ? getBaseConstraint(baseIndexedAccess) : undefined;
+                }
+                return t;
             }
-            currentDirectory = parent_7;
         }
-        return typeRoots;
-    }
-    var nodeModulesAtTypes = ts.combinePaths("node_modules", "@types");
-    /**
-     * @param {string | undefined} containingFile - file that contains type reference directive, can be undefined if containing file is unknown.
-     * This is possible in case if resolution is performed for directives specified via 'types' parameter. In this case initial path for secondary lookups
-     * is assumed to be the same as root directory of the project.
-     */
-    function resolveTypeReferenceDirective(typeReferenceDirectiveName, containingFile, options, host) {
-        var traceEnabled = isTraceEnabled(options, host);
-        var moduleResolutionState = {
-            compilerOptions: options,
-            host: host,
-            skipTsx: true,
-            traceEnabled: traceEnabled
-        };
-        var typeRoots = getEffectiveTypeRoots(options, host);
-        if (traceEnabled) {
-            if (containingFile === undefined) {
-                if (typeRoots === undefined) {
-                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set, typeReferenceDirectiveName);
+        function getApparentTypeOfIntersectionType(type) {
+            return type.resolvedApparentType || (type.resolvedApparentType = getTypeWithThisArgument(type, type));
+        }
+        /**
+         * Gets the default type for a type parameter.
+         *
+         * If the type parameter is the result of an instantiation, this gets the instantiated
+         * default type of its target. If the type parameter has no default type, `undefined`
+         * is returned.
+         *
+         * This function *does not* perform a circularity check.
+         */
+        function getDefaultFromTypeParameter(typeParameter) {
+            if (!typeParameter.default) {
+                if (typeParameter.target) {
+                    var targetDefault = getDefaultFromTypeParameter(typeParameter.target);
+                    typeParameter.default = targetDefault ? instantiateType(targetDefault, typeParameter.mapper) : noConstraintType;
                 }
                 else {
-                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1, typeReferenceDirectiveName, typeRoots);
+                    var defaultDeclaration = typeParameter.symbol && ts.forEach(typeParameter.symbol.declarations, function (decl) { return ts.isTypeParameterDeclaration(decl) && decl.default; });
+                    typeParameter.default = defaultDeclaration ? getTypeFromTypeNode(defaultDeclaration) : noConstraintType;
                 }
             }
-            else {
-                if (typeRoots === undefined) {
-                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set, typeReferenceDirectiveName, containingFile);
+            return typeParameter.default === noConstraintType ? undefined : typeParameter.default;
+        }
+        /**
+         * For a type parameter, return the base constraint of the type parameter. For the string, number,
+         * boolean, and symbol primitive types, return the corresponding object types. Otherwise return the
+         * type itself. Note that the apparent type of a union type is the union type itself.
+         */
+        function getApparentType(type) {
+            var t = type.flags & 540672 /* TypeVariable */ ? getBaseConstraintOfType(type) || emptyObjectType : type;
+            return t.flags & 131072 /* Intersection */ ? getApparentTypeOfIntersectionType(t) :
+                t.flags & 262178 /* StringLike */ ? globalStringType :
+                    t.flags & 84 /* NumberLike */ ? globalNumberType :
+                        t.flags & 136 /* BooleanLike */ ? globalBooleanType :
+                            t.flags & 512 /* ESSymbol */ ? getGlobalESSymbolType(/*reportErrors*/ languageVersion >= 2 /* ES2015 */) :
+                                t.flags & 16777216 /* NonPrimitive */ ? emptyObjectType :
+                                    t;
+        }
+        function createUnionOrIntersectionProperty(containingType, name) {
+            var props;
+            var types = containingType.types;
+            var isUnion = containingType.flags & 65536 /* Union */;
+            var excludeModifiers = isUnion ? 24 /* NonPublicAccessibilityModifier */ : 0;
+            // Flags we want to propagate to the result if they exist in all source symbols
+            var commonFlags = isUnion ? 0 /* None */ : 67108864 /* Optional */;
+            var syntheticFlag = 4 /* SyntheticMethod */;
+            var checkFlags = 0;
+            for (var _i = 0, types_3 = types; _i < types_3.length; _i++) {
+                var current = types_3[_i];
+                var type = getApparentType(current);
+                if (type !== unknownType) {
+                    var prop = getPropertyOfType(type, name);
+                    var modifiers = prop ? ts.getDeclarationModifierFlagsFromSymbol(prop) : 0;
+                    if (prop && !(modifiers & excludeModifiers)) {
+                        commonFlags &= prop.flags;
+                        if (!props) {
+                            props = [prop];
+                        }
+                        else if (!ts.contains(props, prop)) {
+                            props.push(prop);
+                        }
+                        checkFlags |= (isReadonlySymbol(prop) ? 8 /* Readonly */ : 0) |
+                            (!(modifiers & 24 /* NonPublicAccessibilityModifier */) ? 64 /* ContainsPublic */ : 0) |
+                            (modifiers & 16 /* Protected */ ? 128 /* ContainsProtected */ : 0) |
+                            (modifiers & 8 /* Private */ ? 256 /* ContainsPrivate */ : 0) |
+                            (modifiers & 32 /* Static */ ? 512 /* ContainsStatic */ : 0);
+                        if (!isMethodLike(prop)) {
+                            syntheticFlag = 2 /* SyntheticProperty */;
+                        }
+                    }
+                    else if (isUnion) {
+                        checkFlags |= 16 /* Partial */;
+                    }
                 }
-                else {
-                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_1_root_directory_2, typeReferenceDirectiveName, containingFile, typeRoots);
+            }
+            if (!props) {
+                return undefined;
+            }
+            if (props.length === 1 && !(checkFlags & 16 /* Partial */)) {
+                return props[0];
+            }
+            var propTypes = [];
+            var declarations = [];
+            var commonType = undefined;
+            for (var _a = 0, props_1 = props; _a < props_1.length; _a++) {
+                var prop = props_1[_a];
+                if (prop.declarations) {
+                    ts.addRange(declarations, prop.declarations);
+                }
+                var type = getTypeOfSymbol(prop);
+                if (!commonType) {
+                    commonType = type;
+                }
+                else if (type !== commonType) {
+                    checkFlags |= 32 /* HasNonUniformType */;
                 }
+                propTypes.push(type);
             }
+            var result = createSymbol(4 /* Property */ | commonFlags, name);
+            result.checkFlags = syntheticFlag | checkFlags;
+            result.containingType = containingType;
+            result.declarations = declarations;
+            result.type = isUnion ? getUnionType(propTypes) : getIntersectionType(propTypes);
+            return result;
         }
-        var failedLookupLocations = [];
-        // Check primary library paths
-        if (typeRoots && typeRoots.length) {
-            if (traceEnabled) {
-                trace(host, ts.Diagnostics.Resolving_with_primary_search_path_0, typeRoots.join(", "));
-            }
-            var primarySearchPaths = typeRoots;
-            for (var _i = 0, primarySearchPaths_1 = primarySearchPaths; _i < primarySearchPaths_1.length; _i++) {
-                var typeRoot = primarySearchPaths_1[_i];
-                var candidate = ts.combinePaths(typeRoot, typeReferenceDirectiveName);
-                var candidateDirectory = ts.getDirectoryPath(candidate);
-                var resolvedFile_1 = loadNodeModuleFromDirectory(typeReferenceExtensions, candidate, failedLookupLocations, !directoryProbablyExists(candidateDirectory, host), moduleResolutionState);
-                if (resolvedFile_1) {
-                    if (traceEnabled) {
-                        trace(host, ts.Diagnostics.Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2, typeReferenceDirectiveName, resolvedFile_1, true);
+        // Return the symbol for a given property in a union or intersection type, or undefined if the property
+        // does not exist in any constituent type. Note that the returned property may only be present in some
+        // constituents, in which case the isPartial flag is set when the containing type is union type. We need
+        // these partial properties when identifying discriminant properties, but otherwise they are filtered out
+        // and do not appear to be present in the union type.
+        function getUnionOrIntersectionProperty(type, name) {
+            var properties = type.propertyCache || (type.propertyCache = ts.createMap());
+            var property = properties.get(name);
+            if (!property) {
+                property = createUnionOrIntersectionProperty(type, name);
+                if (property) {
+                    properties.set(name, property);
+                }
+            }
+            return property;
+        }
+        function getPropertyOfUnionOrIntersectionType(type, name) {
+            var property = getUnionOrIntersectionProperty(type, name);
+            // We need to filter out partial properties in union types
+            return property && !(ts.getCheckFlags(property) & 16 /* Partial */) ? property : undefined;
+        }
+        /**
+         * Return the symbol for the property with the given name in the given type. Creates synthetic union properties when
+         * necessary, maps primitive types and type parameters are to their apparent types, and augments with properties from
+         * Object and Function as appropriate.
+         *
+         * @param type a type to look up property from
+         * @param name a name of property to look up in a given type
+         */
+        function getPropertyOfType(type, name) {
+            type = getApparentType(type);
+            if (type.flags & 32768 /* Object */) {
+                var resolved = resolveStructuredTypeMembers(type);
+                var symbol = resolved.members.get(name);
+                if (symbol && symbolIsValue(symbol)) {
+                    return symbol;
+                }
+                if (resolved === anyFunctionType || resolved.callSignatures.length || resolved.constructSignatures.length) {
+                    var symbol_1 = getPropertyOfObjectType(globalFunctionType, name);
+                    if (symbol_1) {
+                        return symbol_1;
                     }
-                    return {
-                        resolvedTypeReferenceDirective: { primary: true, resolvedFileName: resolvedFile_1 },
-                        failedLookupLocations: failedLookupLocations
-                    };
                 }
+                return getPropertyOfObjectType(globalObjectType, name);
+            }
+            if (type.flags & 196608 /* UnionOrIntersection */) {
+                return getPropertyOfUnionOrIntersectionType(type, name);
             }
+            return undefined;
         }
-        else {
-            if (traceEnabled) {
-                trace(host, ts.Diagnostics.Root_directory_cannot_be_determined_skipping_primary_search_paths);
+        function getSignaturesOfStructuredType(type, kind) {
+            if (type.flags & 229376 /* StructuredType */) {
+                var resolved = resolveStructuredTypeMembers(type);
+                return kind === 0 /* Call */ ? resolved.callSignatures : resolved.constructSignatures;
             }
+            return emptyArray;
         }
-        var resolvedFile;
-        var initialLocationForSecondaryLookup;
-        if (containingFile) {
-            initialLocationForSecondaryLookup = ts.getDirectoryPath(containingFile);
+        /**
+         * Return the signatures of the given kind in the given type. Creates synthetic union signatures when necessary and
+         * maps primitive types and type parameters are to their apparent types.
+         */
+        function getSignaturesOfType(type, kind) {
+            return getSignaturesOfStructuredType(getApparentType(type), kind);
         }
-        if (initialLocationForSecondaryLookup !== undefined) {
-            // check secondary locations
-            if (traceEnabled) {
-                trace(host, ts.Diagnostics.Looking_up_in_node_modules_folder_initial_location_0, initialLocationForSecondaryLookup);
+        function getIndexInfoOfStructuredType(type, kind) {
+            if (type.flags & 229376 /* StructuredType */) {
+                var resolved = resolveStructuredTypeMembers(type);
+                return kind === 0 /* String */ ? resolved.stringIndexInfo : resolved.numberIndexInfo;
             }
-            resolvedFile = loadModuleFromNodeModules(typeReferenceDirectiveName, initialLocationForSecondaryLookup, failedLookupLocations, moduleResolutionState, /*checkOneLevel*/ false);
-            if (traceEnabled) {
-                if (resolvedFile) {
-                    trace(host, ts.Diagnostics.Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2, typeReferenceDirectiveName, resolvedFile, false);
+        }
+        function getIndexTypeOfStructuredType(type, kind) {
+            var info = getIndexInfoOfStructuredType(type, kind);
+            return info && info.type;
+        }
+        // Return the indexing info of the given kind in the given type. Creates synthetic union index types when necessary and
+        // maps primitive types and type parameters are to their apparent types.
+        function getIndexInfoOfType(type, kind) {
+            return getIndexInfoOfStructuredType(getApparentType(type), kind);
+        }
+        // Return the index type of the given kind in the given type. Creates synthetic union index types when necessary and
+        // maps primitive types and type parameters are to their apparent types.
+        function getIndexTypeOfType(type, kind) {
+            return getIndexTypeOfStructuredType(getApparentType(type), kind);
+        }
+        function getImplicitIndexTypeOfType(type, kind) {
+            if (isObjectLiteralType(type)) {
+                var propTypes = [];
+                for (var _i = 0, _a = getPropertiesOfType(type); _i < _a.length; _i++) {
+                    var prop = _a[_i];
+                    if (kind === 0 /* String */ || isNumericLiteralName(prop.name)) {
+                        propTypes.push(getTypeOfSymbol(prop));
+                    }
                 }
-                else {
-                    trace(host, ts.Diagnostics.Type_reference_directive_0_was_not_resolved, typeReferenceDirectiveName);
+                if (propTypes.length) {
+                    return getUnionType(propTypes, /*subtypeReduction*/ true);
                 }
             }
+            return undefined;
         }
-        else {
-            if (traceEnabled) {
-                trace(host, ts.Diagnostics.Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_modules_folder);
-            }
+        // Return list of type parameters with duplicates removed (duplicate identifier errors are generated in the actual
+        // type checking functions).
+        function getTypeParametersFromDeclaration(declaration) {
+            var result;
+            ts.forEach(ts.getEffectiveTypeParameterDeclarations(declaration), function (node) {
+                var tp = getDeclaredTypeOfTypeParameter(node.symbol);
+                if (!ts.contains(result, tp)) {
+                    if (!result) {
+                        result = [];
+                    }
+                    result.push(tp);
+                }
+            });
+            return result;
         }
-        return {
-            resolvedTypeReferenceDirective: resolvedFile
-                ? { primary: false, resolvedFileName: resolvedFile }
-                : undefined,
-            failedLookupLocations: failedLookupLocations
-        };
-    }
-    ts.resolveTypeReferenceDirective = resolveTypeReferenceDirective;
-    /**
-      * Given a set of options, returns the set of type directive names
-      *   that should be included for this program automatically.
-      * This list could either come from the config file,
-      *   or from enumerating the types root + initial secondary types lookup location.
-      * More type directives might appear in the program later as a result of loading actual source files;
-      *   this list is only the set of defaults that are implicitly included.
-      */
-    function getAutomaticTypeDirectiveNames(options, host) {
-        // Use explicit type list from tsconfig.json
-        if (options.types) {
-            return options.types;
+        function symbolsToArray(symbols) {
+            var result = [];
+            symbols.forEach(function (symbol, id) {
+                if (!isReservedMemberName(id)) {
+                    result.push(symbol);
+                }
+            });
+            return result;
         }
-        // Walk the primary type lookup locations
-        var result = [];
-        if (host.directoryExists && host.getDirectories) {
-            var typeRoots = getEffectiveTypeRoots(options, host);
-            if (typeRoots) {
-                for (var _i = 0, typeRoots_1 = typeRoots; _i < typeRoots_1.length; _i++) {
-                    var root = typeRoots_1[_i];
-                    if (host.directoryExists(root)) {
-                        for (var _a = 0, _b = host.getDirectories(root); _a < _b.length; _a++) {
-                            var typeDirectivePath = _b[_a];
-                            var normalized = ts.normalizePath(typeDirectivePath);
-                            var packageJsonPath = pathToPackageJson(ts.combinePaths(root, normalized));
-                            // tslint:disable-next-line:no-null-keyword
-                            var isNotNeededPackage = host.fileExists(packageJsonPath) && readJson(packageJsonPath, host).typings === null;
-                            if (!isNotNeededPackage) {
-                                // Return just the type directive names
-                                result.push(ts.getBaseFileName(normalized));
-                            }
+        function isJSDocOptionalParameter(node) {
+            if (node.flags & 65536 /* JavaScriptFile */) {
+                if (node.type && node.type.kind === 278 /* JSDocOptionalType */) {
+                    return true;
+                }
+                var paramTags = ts.getJSDocParameterTags(node);
+                if (paramTags) {
+                    for (var _i = 0, paramTags_1 = paramTags; _i < paramTags_1.length; _i++) {
+                        var paramTag = paramTags_1[_i];
+                        if (paramTag.isBracketed) {
+                            return true;
+                        }
+                        if (paramTag.typeExpression) {
+                            return paramTag.typeExpression.type.kind === 278 /* JSDocOptionalType */;
                         }
                     }
                 }
             }
         }
-        return result;
-    }
-    ts.getAutomaticTypeDirectiveNames = getAutomaticTypeDirectiveNames;
-    function resolveModuleName(moduleName, containingFile, compilerOptions, host) {
-        var traceEnabled = isTraceEnabled(compilerOptions, host);
-        if (traceEnabled) {
-            trace(host, ts.Diagnostics.Resolving_module_0_from_1, moduleName, containingFile);
-        }
-        var moduleResolution = compilerOptions.moduleResolution;
-        if (moduleResolution === undefined) {
-            moduleResolution = ts.getEmitModuleKind(compilerOptions) === ts.ModuleKind.CommonJS ? ts.ModuleResolutionKind.NodeJs : ts.ModuleResolutionKind.Classic;
-            if (traceEnabled) {
-                trace(host, ts.Diagnostics.Module_resolution_kind_is_not_specified_using_0, ts.ModuleResolutionKind[moduleResolution]);
+        function tryFindAmbientModule(moduleName, withAugmentations) {
+            if (ts.isExternalModuleNameRelative(moduleName)) {
+                return undefined;
             }
+            var symbol = getSymbol(globals, "\"" + moduleName + "\"", 512 /* ValueModule */);
+            // merged symbol is module declaration symbol combined with all augmentations
+            return symbol && withAugmentations ? getMergedSymbol(symbol) : symbol;
         }
-        else {
-            if (traceEnabled) {
-                trace(host, ts.Diagnostics.Explicitly_specified_module_resolution_kind_Colon_0, ts.ModuleResolutionKind[moduleResolution]);
+        function isOptionalParameter(node) {
+            if (ts.hasQuestionToken(node) || isJSDocOptionalParameter(node)) {
+                return true;
             }
+            if (node.initializer) {
+                var signatureDeclaration = node.parent;
+                var signature = getSignatureFromDeclaration(signatureDeclaration);
+                var parameterIndex = ts.indexOf(signatureDeclaration.parameters, node);
+                ts.Debug.assert(parameterIndex >= 0);
+                return parameterIndex >= signature.minArgumentCount;
+            }
+            var iife = ts.getImmediatelyInvokedFunctionExpression(node.parent);
+            if (iife) {
+                return !node.type &&
+                    !node.dotDotDotToken &&
+                    ts.indexOf(node.parent.parameters, node) >= iife.arguments.length;
+            }
+            return false;
         }
-        var result;
-        switch (moduleResolution) {
-            case ts.ModuleResolutionKind.NodeJs:
-                result = nodeModuleNameResolver(moduleName, containingFile, compilerOptions, host);
-                break;
-            case ts.ModuleResolutionKind.Classic:
-                result = classicNameResolver(moduleName, containingFile, compilerOptions, host);
-                break;
-        }
-        if (traceEnabled) {
-            if (result.resolvedModule) {
-                trace(host, ts.Diagnostics.Module_name_0_was_successfully_resolved_to_1, moduleName, result.resolvedModule.resolvedFileName);
+        function createTypePredicateFromTypePredicateNode(node) {
+            if (node.parameterName.kind === 71 /* Identifier */) {
+                var parameterName = node.parameterName;
+                return {
+                    kind: 1 /* Identifier */,
+                    parameterName: parameterName ? parameterName.text : undefined,
+                    parameterIndex: parameterName ? getTypePredicateParameterIndex(node.parent.parameters, parameterName) : undefined,
+                    type: getTypeFromTypeNode(node.type)
+                };
             }
             else {
-                trace(host, ts.Diagnostics.Module_name_0_was_not_resolved, moduleName);
+                return {
+                    kind: 0 /* This */,
+                    type: getTypeFromTypeNode(node.type)
+                };
             }
         }
-        return result;
-    }
-    ts.resolveModuleName = resolveModuleName;
-    /**
-     * Any module resolution kind can be augmented with optional settings: 'baseUrl', 'paths' and 'rootDirs' - they are used to
-     * mitigate differences between design time structure of the project and its runtime counterpart so the same import name
-     * can be resolved successfully by TypeScript compiler and runtime module loader.
-     * If these settings are set then loading procedure will try to use them to resolve module name and it can of failure it will
-     * fallback to standard resolution routine.
-     *
-     * - baseUrl - this setting controls how non-relative module names are resolved. If this setting is specified then non-relative
-     * names will be resolved relative to baseUrl: i.e. if baseUrl is '/a/b' then candidate location to resolve module name 'c/d' will
-     * be '/a/b/c/d'
-     * - paths - this setting can only be used when baseUrl is specified. allows to tune how non-relative module names
-     * will be resolved based on the content of the module name.
-     * Structure of 'paths' compiler options
-     * 'paths': {
-     *    pattern-1: [...substitutions],
-     *    pattern-2: [...substitutions],
-     *    ...
-     *    pattern-n: [...substitutions]
-     * }
-     * Pattern here is a string that can contain zero or one '*' character. During module resolution module name will be matched against
-     * all patterns in the list. Matching for patterns that don't contain '*' means that module name must be equal to pattern respecting the case.
-     * If pattern contains '*' then to match pattern "<prefix>*<suffix>" module name must start with the <prefix> and end with <suffix>.
-     * <MatchedStar> denotes part of the module name between <prefix> and <suffix>.
-     * If module name can be matches with multiple patterns then pattern with the longest prefix will be picked.
-     * After selecting pattern we'll use list of substitutions to get candidate locations of the module and the try to load module
-     * from the candidate location.
-     * Substitution is a string that can contain zero or one '*'. To get candidate location from substitution we'll pick every
-     * substitution in the list and replace '*' with <MatchedStar> string. If candidate location is not rooted it
-     * will be converted to absolute using baseUrl.
-     * For example:
-     * baseUrl: /a/b/c
-     * "paths": {
-     *     // match all module names
-     *     "*": [
-     *         "*",        // use matched name as is,
-     *                     // <matched name> will be looked as /a/b/c/<matched name>
-     *
-     *         "folder1/*" // substitution will convert matched name to 'folder1/<matched name>',
-     *                     // since it is not rooted then final candidate location will be /a/b/c/folder1/<matched name>
-     *     ],
-     *     // match module names that start with 'components/'
-     *     "components/*": [ "/root/components/*" ] // substitution will convert /components/folder1/<matched name> to '/root/components/folder1/<matched name>',
-     *                                              // it is rooted so it will be final candidate location
-     * }
-     *
-     * 'rootDirs' allows the project to be spreaded across multiple locations and resolve modules with relative names as if
-     * they were in the same location. For example lets say there are two files
-     * '/local/src/content/file1.ts'
-     * '/shared/components/contracts/src/content/protocols/file2.ts'
-     * After bundling content of '/shared/components/contracts/src' will be merged with '/local/src' so
-     * if file1 has the following import 'import {x} from "./protocols/file2"' it will be resolved successfully in runtime.
-     * 'rootDirs' provides the way to tell compiler that in order to get the whole project it should behave as if content of all
-     * root dirs were merged together.
-     * I.e. for the example above 'rootDirs' will have two entries: [ '/local/src', '/shared/components/contracts/src' ].
-     * Compiler will first convert './protocols/file2' into absolute path relative to the location of containing file:
-     * '/local/src/content/protocols/file2' and try to load it - failure.
-     * Then it will search 'rootDirs' looking for a longest matching prefix of this absolute path and if such prefix is found - absolute path will
-     * be converted to a path relative to found rootDir entry './content/protocols/file2' (*). As a last step compiler will check all remaining
-     * entries in 'rootDirs', use them to build absolute path out of (*) and try to resolve module from this location.
-     */
-    function tryLoadModuleUsingOptionalResolutionSettings(moduleName, containingDirectory, loader, failedLookupLocations, supportedExtensions, state) {
-        if (moduleHasNonRelativeName(moduleName)) {
-            return tryLoadModuleUsingBaseUrl(moduleName, loader, failedLookupLocations, supportedExtensions, state);
-        }
-        else {
-            return tryLoadModuleUsingRootDirs(moduleName, containingDirectory, loader, failedLookupLocations, supportedExtensions, state);
-        }
-    }
-    function tryLoadModuleUsingRootDirs(moduleName, containingDirectory, loader, failedLookupLocations, supportedExtensions, state) {
-        if (!state.compilerOptions.rootDirs) {
-            return undefined;
-        }
-        if (state.traceEnabled) {
-            trace(state.host, ts.Diagnostics.rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0, moduleName);
-        }
-        var candidate = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
-        var matchedRootDir;
-        var matchedNormalizedPrefix;
-        for (var _i = 0, _a = state.compilerOptions.rootDirs; _i < _a.length; _i++) {
-            var rootDir = _a[_i];
-            // rootDirs are expected to be absolute
-            // in case of tsconfig.json this will happen automatically - compiler will expand relative names
-            // using location of tsconfig.json as base location
-            var normalizedRoot = ts.normalizePath(rootDir);
-            if (!ts.endsWith(normalizedRoot, ts.directorySeparator)) {
-                normalizedRoot += ts.directorySeparator;
+        /**
+         * Gets the minimum number of type arguments needed to satisfy all non-optional type
+         * parameters.
+         */
+        function getMinTypeArgumentCount(typeParameters) {
+            var minTypeArgumentCount = 0;
+            if (typeParameters) {
+                for (var i = 0; i < typeParameters.length; i++) {
+                    if (!getDefaultFromTypeParameter(typeParameters[i])) {
+                        minTypeArgumentCount = i + 1;
+                    }
+                }
             }
-            var isLongestMatchingPrefix = ts.startsWith(candidate, normalizedRoot) &&
-                (matchedNormalizedPrefix === undefined || matchedNormalizedPrefix.length < normalizedRoot.length);
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Checking_if_0_is_the_longest_matching_prefix_for_1_2, normalizedRoot, candidate, isLongestMatchingPrefix);
+            return minTypeArgumentCount;
+        }
+        /**
+         * Fill in default types for unsupplied type arguments. If `typeArguments` is undefined
+         * when a default type is supplied, a new array will be created and returned.
+         *
+         * @param typeArguments The supplied type arguments.
+         * @param typeParameters The requested type parameters.
+         * @param minTypeArgumentCount The minimum number of required type arguments.
+         */
+        function fillMissingTypeArguments(typeArguments, typeParameters, minTypeArgumentCount, location) {
+            var numTypeParameters = ts.length(typeParameters);
+            if (numTypeParameters) {
+                var numTypeArguments = ts.length(typeArguments);
+                var isJavaScript = ts.isInJavaScriptFile(location);
+                if ((isJavaScript || numTypeArguments >= minTypeArgumentCount) && numTypeArguments <= numTypeParameters) {
+                    if (!typeArguments) {
+                        typeArguments = [];
+                    }
+                    // Map an unsatisfied type parameter with a default type.
+                    // If a type parameter does not have a default type, or if the default type
+                    // is a forward reference, the empty object type is used.
+                    for (var i = numTypeArguments; i < numTypeParameters; i++) {
+                        typeArguments[i] = isJavaScript ? anyType : emptyObjectType;
+                    }
+                    for (var i = numTypeArguments; i < numTypeParameters; i++) {
+                        var mapper = createTypeMapper(typeParameters, typeArguments);
+                        var defaultType = getDefaultFromTypeParameter(typeParameters[i]);
+                        typeArguments[i] = defaultType ? instantiateType(defaultType, mapper) : isJavaScript ? anyType : emptyObjectType;
+                    }
+                }
             }
-            if (isLongestMatchingPrefix) {
-                matchedNormalizedPrefix = normalizedRoot;
-                matchedRootDir = rootDir;
+            return typeArguments;
+        }
+        function getSignatureFromDeclaration(declaration) {
+            var links = getNodeLinks(declaration);
+            if (!links.resolvedSignature) {
+                var parameters = [];
+                var hasLiteralTypes = false;
+                var minArgumentCount = 0;
+                var thisParameter = undefined;
+                var hasThisParameter = void 0;
+                var iife = ts.getImmediatelyInvokedFunctionExpression(declaration);
+                var isJSConstructSignature = ts.isJSDocConstructSignature(declaration);
+                var isUntypedSignatureInJSFile = !iife && !isJSConstructSignature && ts.isInJavaScriptFile(declaration) && !ts.hasJSDocParameterTags(declaration);
+                // If this is a JSDoc construct signature, then skip the first parameter in the
+                // parameter list.  The first parameter represents the return type of the construct
+                // signature.
+                for (var i = isJSConstructSignature ? 1 : 0; i < declaration.parameters.length; i++) {
+                    var param = declaration.parameters[i];
+                    var paramSymbol = param.symbol;
+                    // Include parameter symbol instead of property symbol in the signature
+                    if (paramSymbol && !!(paramSymbol.flags & 4 /* Property */) && !ts.isBindingPattern(param.name)) {
+                        var resolvedSymbol = resolveName(param, paramSymbol.name, 107455 /* Value */, undefined, undefined);
+                        paramSymbol = resolvedSymbol;
+                    }
+                    if (i === 0 && paramSymbol.name === "this") {
+                        hasThisParameter = true;
+                        thisParameter = param.symbol;
+                    }
+                    else {
+                        parameters.push(paramSymbol);
+                    }
+                    if (param.type && param.type.kind === 173 /* LiteralType */) {
+                        hasLiteralTypes = true;
+                    }
+                    // Record a new minimum argument count if this is not an optional parameter
+                    var isOptionalParameter_1 = param.initializer || param.questionToken || param.dotDotDotToken ||
+                        iife && parameters.length > iife.arguments.length && !param.type ||
+                        isJSDocOptionalParameter(param) ||
+                        isUntypedSignatureInJSFile;
+                    if (!isOptionalParameter_1) {
+                        minArgumentCount = parameters.length;
+                    }
+                }
+                // If only one accessor includes a this-type annotation, the other behaves as if it had the same type annotation
+                if ((declaration.kind === 153 /* GetAccessor */ || declaration.kind === 154 /* SetAccessor */) &&
+                    !ts.hasDynamicName(declaration) &&
+                    (!hasThisParameter || !thisParameter)) {
+                    var otherKind = declaration.kind === 153 /* GetAccessor */ ? 154 /* SetAccessor */ : 153 /* GetAccessor */;
+                    var other = ts.getDeclarationOfKind(declaration.symbol, otherKind);
+                    if (other) {
+                        thisParameter = getAnnotatedAccessorThisParameter(other);
+                    }
+                }
+                var classType = declaration.kind === 152 /* Constructor */ ?
+                    getDeclaredTypeOfClassOrInterface(getMergedSymbol(declaration.parent.symbol))
+                    : undefined;
+                var typeParameters = classType ? classType.localTypeParameters : getTypeParametersFromDeclaration(declaration);
+                var returnType = getSignatureReturnTypeFromDeclaration(declaration, isJSConstructSignature, classType);
+                var typePredicate = declaration.type && declaration.type.kind === 158 /* TypePredicate */ ?
+                    createTypePredicateFromTypePredicateNode(declaration.type) :
+                    undefined;
+                // JS functions get a free rest parameter if they reference `arguments`
+                var hasRestLikeParameter = ts.hasRestParameter(declaration);
+                if (!hasRestLikeParameter && ts.isInJavaScriptFile(declaration) && !ts.hasJSDocParameterTags(declaration) && containsArgumentsReference(declaration)) {
+                    hasRestLikeParameter = true;
+                    var syntheticArgsSymbol = createSymbol(3 /* Variable */, "args");
+                    syntheticArgsSymbol.type = anyArrayType;
+                    syntheticArgsSymbol.isRestParameter = true;
+                    parameters.push(syntheticArgsSymbol);
+                }
+                links.resolvedSignature = createSignature(declaration, typeParameters, thisParameter, parameters, returnType, typePredicate, minArgumentCount, hasRestLikeParameter, hasLiteralTypes);
             }
+            return links.resolvedSignature;
         }
-        if (matchedNormalizedPrefix) {
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Longest_matching_prefix_for_0_is_1, candidate, matchedNormalizedPrefix);
+        function getSignatureReturnTypeFromDeclaration(declaration, isJSConstructSignature, classType) {
+            if (isJSConstructSignature) {
+                return getTypeFromTypeNode(declaration.parameters[0].type);
             }
-            var suffix = candidate.substr(matchedNormalizedPrefix.length);
-            // first - try to load from a initial location
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Loading_0_from_the_root_dir_1_candidate_location_2, suffix, matchedNormalizedPrefix, candidate);
+            else if (classType) {
+                return classType;
             }
-            var resolvedFileName = loader(candidate, supportedExtensions, failedLookupLocations, !directoryProbablyExists(containingDirectory, state.host), state);
-            if (resolvedFileName) {
-                return resolvedFileName;
+            var typeNode = ts.getEffectiveReturnTypeNode(declaration);
+            if (typeNode) {
+                return getTypeFromTypeNode(typeNode);
             }
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Trying_other_entries_in_rootDirs);
+            // TypeScript 1.0 spec (April 2014):
+            // If only one accessor includes a type annotation, the other behaves as if it had the same type annotation.
+            if (declaration.kind === 153 /* GetAccessor */ && !ts.hasDynamicName(declaration)) {
+                var setter = ts.getDeclarationOfKind(declaration.symbol, 154 /* SetAccessor */);
+                return getAnnotatedAccessorType(setter);
             }
-            // then try to resolve using remaining entries in rootDirs
-            for (var _b = 0, _c = state.compilerOptions.rootDirs; _b < _c.length; _b++) {
-                var rootDir = _c[_b];
-                if (rootDir === matchedRootDir) {
-                    // skip the initially matched entry
-                    continue;
-                }
-                var candidate_1 = ts.combinePaths(ts.normalizePath(rootDir), suffix);
-                if (state.traceEnabled) {
-                    trace(state.host, ts.Diagnostics.Loading_0_from_the_root_dir_1_candidate_location_2, suffix, rootDir, candidate_1);
+            if (ts.nodeIsMissing(declaration.body)) {
+                return anyType;
+            }
+        }
+        function containsArgumentsReference(declaration) {
+            var links = getNodeLinks(declaration);
+            if (links.containsArgumentsReference === undefined) {
+                if (links.flags & 8192 /* CaptureArguments */) {
+                    links.containsArgumentsReference = true;
                 }
-                var baseDirectory = ts.getDirectoryPath(candidate_1);
-                var resolvedFileName_1 = loader(candidate_1, supportedExtensions, failedLookupLocations, !directoryProbablyExists(baseDirectory, state.host), state);
-                if (resolvedFileName_1) {
-                    return resolvedFileName_1;
+                else {
+                    links.containsArgumentsReference = traverse(declaration.body);
                 }
             }
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Module_resolution_using_rootDirs_has_failed);
+            return links.containsArgumentsReference;
+            function traverse(node) {
+                if (!node)
+                    return false;
+                switch (node.kind) {
+                    case 71 /* Identifier */:
+                        return node.text === "arguments" && ts.isPartOfExpression(node);
+                    case 149 /* PropertyDeclaration */:
+                    case 151 /* MethodDeclaration */:
+                    case 153 /* GetAccessor */:
+                    case 154 /* SetAccessor */:
+                        return node.name.kind === 144 /* ComputedPropertyName */
+                            && traverse(node.name);
+                    default:
+                        return !ts.nodeStartsNewLexicalEnvironment(node) && !ts.isPartOfTypeNode(node) && ts.forEachChild(node, traverse);
+                }
             }
         }
-        return undefined;
-    }
-    function tryLoadModuleUsingBaseUrl(moduleName, loader, failedLookupLocations, supportedExtensions, state) {
-        if (!state.compilerOptions.baseUrl) {
-            return undefined;
-        }
-        if (state.traceEnabled) {
-            trace(state.host, ts.Diagnostics.baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1, state.compilerOptions.baseUrl, moduleName);
-        }
-        // string is for exact match
-        var matchedPattern = undefined;
-        if (state.compilerOptions.paths) {
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.paths_option_is_specified_looking_for_a_pattern_to_match_module_name_0, moduleName);
+        function getSignaturesOfSymbol(symbol) {
+            if (!symbol)
+                return emptyArray;
+            var result = [];
+            for (var i = 0; i < symbol.declarations.length; i++) {
+                var node = symbol.declarations[i];
+                switch (node.kind) {
+                    case 160 /* FunctionType */:
+                    case 161 /* ConstructorType */:
+                    case 228 /* FunctionDeclaration */:
+                    case 151 /* MethodDeclaration */:
+                    case 150 /* MethodSignature */:
+                    case 152 /* Constructor */:
+                    case 155 /* CallSignature */:
+                    case 156 /* ConstructSignature */:
+                    case 157 /* IndexSignature */:
+                    case 153 /* GetAccessor */:
+                    case 154 /* SetAccessor */:
+                    case 186 /* FunctionExpression */:
+                    case 187 /* ArrowFunction */:
+                    case 279 /* JSDocFunctionType */:
+                        // Don't include signature if node is the implementation of an overloaded function. A node is considered
+                        // an implementation node if it has a body and the previous node is of the same kind and immediately
+                        // precedes the implementation node (i.e. has the same parent and ends where the implementation starts).
+                        if (i > 0 && node.body) {
+                            var previous = symbol.declarations[i - 1];
+                            if (node.parent === previous.parent && node.kind === previous.kind && node.pos === previous.end) {
+                                break;
+                            }
+                        }
+                        result.push(getSignatureFromDeclaration(node));
+                }
             }
-            matchedPattern = ts.matchPatternOrExact(ts.getOwnKeys(state.compilerOptions.paths), moduleName);
+            return result;
         }
-        if (matchedPattern) {
-            var matchedStar = typeof matchedPattern === "string" ? undefined : ts.matchedText(matchedPattern, moduleName);
-            var matchedPatternText = typeof matchedPattern === "string" ? matchedPattern : ts.patternText(matchedPattern);
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Module_name_0_matched_pattern_1, moduleName, matchedPatternText);
-            }
-            for (var _i = 0, _a = state.compilerOptions.paths[matchedPatternText]; _i < _a.length; _i++) {
-                var subst = _a[_i];
-                var path = matchedStar ? subst.replace("*", matchedStar) : subst;
-                var candidate = ts.normalizePath(ts.combinePaths(state.compilerOptions.baseUrl, path));
-                if (state.traceEnabled) {
-                    trace(state.host, ts.Diagnostics.Trying_substitution_0_candidate_module_location_Colon_1, subst, path);
-                }
-                var resolvedFileName = loader(candidate, supportedExtensions, failedLookupLocations, !directoryProbablyExists(ts.getDirectoryPath(candidate), state.host), state);
-                if (resolvedFileName) {
-                    return resolvedFileName;
+        function resolveExternalModuleTypeByLiteral(name) {
+            var moduleSym = resolveExternalModuleName(name, name);
+            if (moduleSym) {
+                var resolvedModuleSymbol = resolveExternalModuleSymbol(moduleSym);
+                if (resolvedModuleSymbol) {
+                    return getTypeOfSymbol(resolvedModuleSymbol);
                 }
             }
-            return undefined;
+            return anyType;
         }
-        else {
-            var candidate = ts.normalizePath(ts.combinePaths(state.compilerOptions.baseUrl, moduleName));
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Resolving_module_name_0_relative_to_base_url_1_2, moduleName, state.compilerOptions.baseUrl, candidate);
+        function getThisTypeOfSignature(signature) {
+            if (signature.thisParameter) {
+                return getTypeOfSymbol(signature.thisParameter);
             }
-            return loader(candidate, supportedExtensions, failedLookupLocations, !directoryProbablyExists(ts.getDirectoryPath(candidate), state.host), state);
         }
-    }
-    function nodeModuleNameResolver(moduleName, containingFile, compilerOptions, host) {
-        var containingDirectory = ts.getDirectoryPath(containingFile);
-        var supportedExtensions = ts.getSupportedExtensions(compilerOptions);
-        var traceEnabled = isTraceEnabled(compilerOptions, host);
-        var failedLookupLocations = [];
-        var state = { compilerOptions: compilerOptions, host: host, traceEnabled: traceEnabled, skipTsx: false };
-        var resolvedFileName = tryLoadModuleUsingOptionalResolutionSettings(moduleName, containingDirectory, nodeLoadModuleByRelativeName, failedLookupLocations, supportedExtensions, state);
-        var isExternalLibraryImport = false;
-        if (!resolvedFileName) {
-            if (moduleHasNonRelativeName(moduleName)) {
-                if (traceEnabled) {
-                    trace(host, ts.Diagnostics.Loading_module_0_from_node_modules_folder, moduleName);
+        function getReturnTypeOfSignature(signature) {
+            if (!signature.resolvedReturnType) {
+                if (!pushTypeResolution(signature, 3 /* ResolvedReturnType */)) {
+                    return unknownType;
+                }
+                var type = void 0;
+                if (signature.target) {
+                    type = instantiateType(getReturnTypeOfSignature(signature.target), signature.mapper);
+                }
+                else if (signature.unionSignatures) {
+                    type = getUnionType(ts.map(signature.unionSignatures, getReturnTypeOfSignature), /*subtypeReduction*/ true);
+                }
+                else {
+                    type = getReturnTypeFromBody(signature.declaration);
+                }
+                if (!popTypeResolution()) {
+                    type = anyType;
+                    if (noImplicitAny) {
+                        var declaration = signature.declaration;
+                        var name_20 = ts.getNameOfDeclaration(declaration);
+                        if (name_20) {
+                            error(name_20, ts.Diagnostics._0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions, ts.declarationNameToString(name_20));
+                        }
+                        else {
+                            error(declaration, ts.Diagnostics.Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions);
+                        }
+                    }
                 }
-                resolvedFileName = loadModuleFromNodeModules(moduleName, containingDirectory, failedLookupLocations, state, /*checkOneLevel*/ false);
-                isExternalLibraryImport = resolvedFileName !== undefined;
+                signature.resolvedReturnType = type;
             }
-            else {
-                var candidate = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
-                resolvedFileName = nodeLoadModuleByRelativeName(candidate, supportedExtensions, failedLookupLocations, /*onlyRecordFailures*/ false, state);
+            return signature.resolvedReturnType;
+        }
+        function getRestTypeOfSignature(signature) {
+            if (signature.hasRestParameter) {
+                var type = getTypeOfSymbol(ts.lastOrUndefined(signature.parameters));
+                if (getObjectFlags(type) & 4 /* Reference */ && type.target === globalArrayType) {
+                    return type.typeArguments[0];
+                }
             }
+            return anyType;
         }
-        if (resolvedFileName && host.realpath) {
-            var originalFileName = resolvedFileName;
-            resolvedFileName = ts.normalizePath(host.realpath(resolvedFileName));
-            if (traceEnabled) {
-                trace(host, ts.Diagnostics.Resolving_real_path_for_0_result_1, originalFileName, resolvedFileName);
+        function getSignatureInstantiation(signature, typeArguments) {
+            typeArguments = fillMissingTypeArguments(typeArguments, signature.typeParameters, getMinTypeArgumentCount(signature.typeParameters));
+            var instantiations = signature.instantiations || (signature.instantiations = ts.createMap());
+            var id = getTypeListId(typeArguments);
+            var instantiation = instantiations.get(id);
+            if (!instantiation) {
+                instantiations.set(id, instantiation = createSignatureInstantiation(signature, typeArguments));
             }
+            return instantiation;
         }
-        return createResolvedModule(resolvedFileName, isExternalLibraryImport, failedLookupLocations);
-    }
-    ts.nodeModuleNameResolver = nodeModuleNameResolver;
-    function nodeLoadModuleByRelativeName(candidate, supportedExtensions, failedLookupLocations, onlyRecordFailures, state) {
-        if (state.traceEnabled) {
-            trace(state.host, ts.Diagnostics.Loading_module_as_file_Slash_folder_candidate_module_location_0, candidate);
+        function createSignatureInstantiation(signature, typeArguments) {
+            return instantiateSignature(signature, createTypeMapper(signature.typeParameters, typeArguments), /*eraseTypeParameters*/ true);
         }
-        var resolvedFileName = !ts.pathEndsWithDirectorySeparator(candidate) && loadModuleFromFile(candidate, supportedExtensions, failedLookupLocations, onlyRecordFailures, state);
-        return resolvedFileName || loadNodeModuleFromDirectory(supportedExtensions, candidate, failedLookupLocations, onlyRecordFailures, state);
-    }
-    /* @internal */
-    function directoryProbablyExists(directoryName, host) {
-        // if host does not support 'directoryExists' assume that directory will exist
-        return !host.directoryExists || host.directoryExists(directoryName);
-    }
-    ts.directoryProbablyExists = directoryProbablyExists;
-    /**
-     * @param {boolean} onlyRecordFailures - if true then function won't try to actually load files but instead record all attempts as failures. This flag is necessary
-     * in cases when we know upfront that all load attempts will fail (because containing folder does not exists) however we still need to record all failed lookup locations.
-     */
-    function loadModuleFromFile(candidate, extensions, failedLookupLocation, onlyRecordFailures, state) {
-        // First, try adding an extension. An import of "foo" could be matched by a file "foo.ts", or "foo.js" by "foo.js.ts"
-        var resolvedByAddingExtension = tryAddingExtensions(candidate, extensions, failedLookupLocation, onlyRecordFailures, state);
-        if (resolvedByAddingExtension) {
-            return resolvedByAddingExtension;
+        function getErasedSignature(signature) {
+            if (!signature.typeParameters)
+                return signature;
+            if (!signature.erasedSignatureCache) {
+                signature.erasedSignatureCache = instantiateSignature(signature, createTypeEraser(signature.typeParameters), /*eraseTypeParameters*/ true);
+            }
+            return signature.erasedSignatureCache;
         }
-        // If that didn't work, try stripping a ".js" or ".jsx" extension and replacing it with a TypeScript one;
-        // e.g. "./foo.js" can be matched by "./foo.ts" or "./foo.d.ts"
-        if (ts.hasJavaScriptFileExtension(candidate)) {
-            var extensionless = ts.removeFileExtension(candidate);
-            if (state.traceEnabled) {
-                var extension = candidate.substring(extensionless.length);
-                trace(state.host, ts.Diagnostics.File_name_0_has_a_1_extension_stripping_it, candidate, extension);
+        function getOrCreateTypeFromSignature(signature) {
+            // There are two ways to declare a construct signature, one is by declaring a class constructor
+            // using the constructor keyword, and the other is declaring a bare construct signature in an
+            // object type literal or interface (using the new keyword). Each way of declaring a constructor
+            // will result in a different declaration kind.
+            if (!signature.isolatedSignatureType) {
+                var isConstructor = signature.declaration.kind === 152 /* Constructor */ || signature.declaration.kind === 156 /* ConstructSignature */;
+                var type = createObjectType(16 /* Anonymous */);
+                type.members = emptySymbols;
+                type.properties = emptyArray;
+                type.callSignatures = !isConstructor ? [signature] : emptyArray;
+                type.constructSignatures = isConstructor ? [signature] : emptyArray;
+                signature.isolatedSignatureType = type;
             }
-            return tryAddingExtensions(extensionless, extensions, failedLookupLocation, onlyRecordFailures, state);
+            return signature.isolatedSignatureType;
         }
-    }
-    /** Try to return an existing file that adds one of the `extensions` to `candidate`. */
-    function tryAddingExtensions(candidate, extensions, failedLookupLocation, onlyRecordFailures, state) {
-        if (!onlyRecordFailures) {
-            // check if containing folder exists - if it doesn't then just record failures for all supported extensions without disk probing
-            var directory = ts.getDirectoryPath(candidate);
-            if (directory) {
-                onlyRecordFailures = !directoryProbablyExists(directory, state.host);
+        function getIndexSymbol(symbol) {
+            return symbol.members.get("__index");
+        }
+        function getIndexDeclarationOfSymbol(symbol, kind) {
+            var syntaxKind = kind === 1 /* Number */ ? 133 /* NumberKeyword */ : 136 /* StringKeyword */;
+            var indexSymbol = getIndexSymbol(symbol);
+            if (indexSymbol) {
+                for (var _i = 0, _a = indexSymbol.declarations; _i < _a.length; _i++) {
+                    var decl = _a[_i];
+                    var node = decl;
+                    if (node.parameters.length === 1) {
+                        var parameter = node.parameters[0];
+                        if (parameter && parameter.type && parameter.type.kind === syntaxKind) {
+                            return node;
+                        }
+                    }
+                }
             }
+            return undefined;
         }
-        return ts.forEach(extensions, function (ext) {
-            return !(state.skipTsx && ts.isJsxOrTsxExtension(ext)) && tryFile(candidate + ext, failedLookupLocation, onlyRecordFailures, state);
-        });
-    }
-    /** Return the file if it exists. */
-    function tryFile(fileName, failedLookupLocation, onlyRecordFailures, state) {
-        if (!onlyRecordFailures && state.host.fileExists(fileName)) {
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.File_0_exist_use_it_as_a_name_resolution_result, fileName);
-            }
-            return fileName;
+        function createIndexInfo(type, isReadonly, declaration) {
+            return { type: type, isReadonly: isReadonly, declaration: declaration };
         }
-        else {
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.File_0_does_not_exist, fileName);
+        function getIndexInfoOfSymbol(symbol, kind) {
+            var declaration = getIndexDeclarationOfSymbol(symbol, kind);
+            if (declaration) {
+                return createIndexInfo(declaration.type ? getTypeFromTypeNode(declaration.type) : anyType, (ts.getModifierFlags(declaration) & 64 /* Readonly */) !== 0, declaration);
             }
-            failedLookupLocation.push(fileName);
             return undefined;
         }
-    }
-    function loadNodeModuleFromDirectory(extensions, candidate, failedLookupLocation, onlyRecordFailures, state) {
-        var packageJsonPath = pathToPackageJson(candidate);
-        var directoryExists = !onlyRecordFailures && directoryProbablyExists(candidate, state.host);
-        if (directoryExists && state.host.fileExists(packageJsonPath)) {
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Found_package_json_at_0, packageJsonPath);
-            }
-            var typesFile = tryReadTypesSection(packageJsonPath, candidate, state);
-            if (typesFile) {
-                var onlyRecordFailures_1 = !directoryProbablyExists(ts.getDirectoryPath(typesFile), state.host);
-                // A package.json "typings" may specify an exact filename, or may choose to omit an extension.
-                var result = tryFile(typesFile, failedLookupLocation, onlyRecordFailures_1, state) ||
-                    tryAddingExtensions(typesFile, extensions, failedLookupLocation, onlyRecordFailures_1, state);
-                if (result) {
-                    return result;
+        function getConstraintDeclaration(type) {
+            return ts.getDeclarationOfKind(type.symbol, 145 /* TypeParameter */).constraint;
+        }
+        function getConstraintFromTypeParameter(typeParameter) {
+            if (!typeParameter.constraint) {
+                if (typeParameter.target) {
+                    var targetConstraint = getConstraintOfTypeParameter(typeParameter.target);
+                    typeParameter.constraint = targetConstraint ? instantiateType(targetConstraint, typeParameter.mapper) : noConstraintType;
                 }
-            }
-            else {
-                if (state.traceEnabled) {
-                    trace(state.host, ts.Diagnostics.package_json_does_not_have_types_field);
+                else {
+                    var constraintDeclaration = getConstraintDeclaration(typeParameter);
+                    typeParameter.constraint = constraintDeclaration ? getTypeFromTypeNode(constraintDeclaration) : noConstraintType;
                 }
             }
+            return typeParameter.constraint === noConstraintType ? undefined : typeParameter.constraint;
         }
-        else {
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.File_0_does_not_exist, packageJsonPath);
-            }
-            // record package json as one of failed lookup locations - in the future if this file will appear it will invalidate resolution results
-            failedLookupLocation.push(packageJsonPath);
-        }
-        return loadModuleFromFile(ts.combinePaths(candidate, "index"), extensions, failedLookupLocation, !directoryExists, state);
-    }
-    function pathToPackageJson(directory) {
-        return ts.combinePaths(directory, "package.json");
-    }
-    function loadModuleFromNodeModulesFolder(moduleName, directory, failedLookupLocations, state) {
-        var nodeModulesFolder = ts.combinePaths(directory, "node_modules");
-        var nodeModulesFolderExists = directoryProbablyExists(nodeModulesFolder, state.host);
-        var candidate = ts.normalizePath(ts.combinePaths(nodeModulesFolder, moduleName));
-        var supportedExtensions = ts.getSupportedExtensions(state.compilerOptions);
-        var result = loadModuleFromFile(candidate, supportedExtensions, failedLookupLocations, !nodeModulesFolderExists, state);
-        if (result) {
-            return result;
-        }
-        result = loadNodeModuleFromDirectory(supportedExtensions, candidate, failedLookupLocations, !nodeModulesFolderExists, state);
-        if (result) {
-            return result;
+        function getParentSymbolOfTypeParameter(typeParameter) {
+            return getSymbolOfNode(ts.getDeclarationOfKind(typeParameter.symbol, 145 /* TypeParameter */).parent);
         }
-    }
-    /* @internal */
-    function loadModuleFromNodeModules(moduleName, directory, failedLookupLocations, state, checkOneLevel) {
-        directory = ts.normalizeSlashes(directory);
-        while (true) {
-            var baseName = ts.getBaseFileName(directory);
-            if (baseName !== "node_modules") {
-                // Try to load source from the package
-                var packageResult = loadModuleFromNodeModulesFolder(moduleName, directory, failedLookupLocations, state);
-                if (packageResult && ts.hasTypeScriptFileExtension(packageResult)) {
-                    // Always prefer a TypeScript (.ts, .tsx, .d.ts) file shipped with the package
-                    return packageResult;
-                }
-                else {
-                    // Else prefer a types package over non-TypeScript results (e.g. JavaScript files)
-                    var typesResult = loadModuleFromNodeModulesFolder(ts.combinePaths("@types", moduleName), directory, failedLookupLocations, state);
-                    if (typesResult || packageResult) {
-                        return typesResult || packageResult;
+        function getTypeListId(types) {
+            var result = "";
+            if (types) {
+                var length_4 = types.length;
+                var i = 0;
+                while (i < length_4) {
+                    var startId = types[i].id;
+                    var count = 1;
+                    while (i + count < length_4 && types[i + count].id === startId + count) {
+                        count++;
+                    }
+                    if (result.length) {
+                        result += ",";
+                    }
+                    result += startId;
+                    if (count > 1) {
+                        result += ":" + count;
                     }
+                    i += count;
                 }
             }
-            var parentPath = ts.getDirectoryPath(directory);
-            if (parentPath === directory || checkOneLevel) {
-                break;
-            }
-            directory = parentPath;
-        }
-        return undefined;
-    }
-    ts.loadModuleFromNodeModules = loadModuleFromNodeModules;
-    function classicNameResolver(moduleName, containingFile, compilerOptions, host) {
-        var traceEnabled = isTraceEnabled(compilerOptions, host);
-        var state = { compilerOptions: compilerOptions, host: host, traceEnabled: traceEnabled, skipTsx: !compilerOptions.jsx };
-        var failedLookupLocations = [];
-        var supportedExtensions = ts.getSupportedExtensions(compilerOptions);
-        var containingDirectory = ts.getDirectoryPath(containingFile);
-        var resolvedFileName = tryLoadModuleUsingOptionalResolutionSettings(moduleName, containingDirectory, loadModuleFromFile, failedLookupLocations, supportedExtensions, state);
-        if (resolvedFileName) {
-            return createResolvedModule(resolvedFileName, /*isExternalLibraryImport*/ false, failedLookupLocations);
+            return result;
         }
-        var referencedSourceFile;
-        if (moduleHasNonRelativeName(moduleName)) {
-            while (true) {
-                var searchName = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
-                referencedSourceFile = loadModuleFromFile(searchName, supportedExtensions, failedLookupLocations, /*onlyRecordFailures*/ false, state);
-                if (referencedSourceFile) {
-                    break;
-                }
-                var parentPath = ts.getDirectoryPath(containingDirectory);
-                if (parentPath === containingDirectory) {
-                    break;
+        // This function is used to propagate certain flags when creating new object type references and union types.
+        // It is only necessary to do so if a constituent type might be the undefined type, the null type, the type
+        // of an object literal or the anyFunctionType. This is because there are operations in the type checker
+        // that care about the presence of such types at arbitrary depth in a containing type.
+        function getPropagatingFlagsOfTypes(types, excludeKinds) {
+            var result = 0;
+            for (var _i = 0, types_4 = types; _i < types_4.length; _i++) {
+                var type = types_4[_i];
+                if (!(type.flags & excludeKinds)) {
+                    result |= type.flags;
                 }
-                containingDirectory = parentPath;
             }
+            return result & 14680064 /* PropagatingFlags */;
         }
-        else {
-            var candidate = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
-            referencedSourceFile = loadModuleFromFile(candidate, supportedExtensions, failedLookupLocations, /*onlyRecordFailures*/ false, state);
+        function createTypeReference(target, typeArguments) {
+            var id = getTypeListId(typeArguments);
+            var type = target.instantiations.get(id);
+            if (!type) {
+                type = createObjectType(4 /* Reference */, target.symbol);
+                target.instantiations.set(id, type);
+                type.flags |= typeArguments ? getPropagatingFlagsOfTypes(typeArguments, /*excludeKinds*/ 0) : 0;
+                type.target = target;
+                type.typeArguments = typeArguments;
+            }
+            return type;
         }
-        return referencedSourceFile
-            ? { resolvedModule: { resolvedFileName: referencedSourceFile }, failedLookupLocations: failedLookupLocations }
-            : { resolvedModule: undefined, failedLookupLocations: failedLookupLocations };
-    }
-    ts.classicNameResolver = classicNameResolver;
-})(ts || (ts = {}));
-/// <reference path="moduleNameResolver.ts"/>
-/// <reference path="binder.ts"/>
-/* @internal */
-var ts;
-(function (ts) {
-    var ambientModuleSymbolRegex = /^".+"$/;
-    var nextSymbolId = 1;
-    var nextNodeId = 1;
-    var nextMergeId = 1;
-    var nextFlowId = 1;
-    function getNodeId(node) {
-        if (!node.id) {
-            node.id = nextNodeId;
-            nextNodeId++;
+        function cloneTypeReference(source) {
+            var type = createType(source.flags);
+            type.symbol = source.symbol;
+            type.objectFlags = source.objectFlags;
+            type.target = source.target;
+            type.typeArguments = source.typeArguments;
+            return type;
         }
-        return node.id;
-    }
-    ts.getNodeId = getNodeId;
-    function getSymbolId(symbol) {
-        if (!symbol.id) {
-            symbol.id = nextSymbolId;
-            nextSymbolId++;
+        function getTypeReferenceArity(type) {
+            return ts.length(type.target.typeParameters);
         }
-        return symbol.id;
-    }
-    ts.getSymbolId = getSymbolId;
-    function createTypeChecker(host, produceDiagnostics) {
-        // Cancellation that controls whether or not we can cancel in the middle of type checking.
-        // In general cancelling is *not* safe for the type checker.  We might be in the middle of
-        // computing something, and we will leave our internals in an inconsistent state.  Callers
-        // who set the cancellation token should catch if a cancellation exception occurs, and
-        // should throw away and create a new TypeChecker.
-        //
-        // Currently we only support setting the cancellation token when getting diagnostics.  This
-        // is because diagnostics can be quite expensive, and we want to allow hosts to bail out if
-        // they no longer need the information (for example, if the user started editing again).
-        var cancellationToken;
-        var Symbol = ts.objectAllocator.getSymbolConstructor();
-        var Type = ts.objectAllocator.getTypeConstructor();
-        var Signature = ts.objectAllocator.getSignatureConstructor();
-        var typeCount = 0;
-        var symbolCount = 0;
-        var emptyArray = [];
-        var emptySymbols = ts.createMap();
-        var compilerOptions = host.getCompilerOptions();
-        var languageVersion = compilerOptions.target || 0 /* ES3 */;
-        var modulekind = ts.getEmitModuleKind(compilerOptions);
-        var noUnusedIdentifiers = !!compilerOptions.noUnusedLocals || !!compilerOptions.noUnusedParameters;
-        var allowSyntheticDefaultImports = typeof compilerOptions.allowSyntheticDefaultImports !== "undefined" ? compilerOptions.allowSyntheticDefaultImports : modulekind === ts.ModuleKind.System;
-        var strictNullChecks = compilerOptions.strictNullChecks;
-        var emitResolver = createResolver();
-        var undefinedSymbol = createSymbol(4 /* Property */ | 67108864 /* Transient */, "undefined");
-        undefinedSymbol.declarations = [];
-        var argumentsSymbol = createSymbol(4 /* Property */ | 67108864 /* Transient */, "arguments");
-        var checker = {
-            getNodeCount: function () { return ts.sum(host.getSourceFiles(), "nodeCount"); },
-            getIdentifierCount: function () { return ts.sum(host.getSourceFiles(), "identifierCount"); },
-            getSymbolCount: function () { return ts.sum(host.getSourceFiles(), "symbolCount") + symbolCount; },
-            getTypeCount: function () { return typeCount; },
-            isUndefinedSymbol: function (symbol) { return symbol === undefinedSymbol; },
-            isArgumentsSymbol: function (symbol) { return symbol === argumentsSymbol; },
-            isUnknownSymbol: function (symbol) { return symbol === unknownSymbol; },
-            getDiagnostics: getDiagnostics,
-            getGlobalDiagnostics: getGlobalDiagnostics,
-            getTypeOfSymbolAtLocation: getTypeOfSymbolAtLocation,
-            getSymbolsOfParameterPropertyDeclaration: getSymbolsOfParameterPropertyDeclaration,
-            getDeclaredTypeOfSymbol: getDeclaredTypeOfSymbol,
-            getPropertiesOfType: getPropertiesOfType,
-            getPropertyOfType: getPropertyOfType,
-            getSignaturesOfType: getSignaturesOfType,
-            getIndexTypeOfType: getIndexTypeOfType,
-            getBaseTypes: getBaseTypes,
-            getReturnTypeOfSignature: getReturnTypeOfSignature,
-            getNonNullableType: getNonNullableType,
-            getSymbolsInScope: getSymbolsInScope,
-            getSymbolAtLocation: getSymbolAtLocation,
-            getShorthandAssignmentValueSymbol: getShorthandAssignmentValueSymbol,
-            getExportSpecifierLocalTargetSymbol: getExportSpecifierLocalTargetSymbol,
-            getTypeAtLocation: getTypeOfNode,
-            getPropertySymbolOfDestructuringAssignment: getPropertySymbolOfDestructuringAssignment,
-            typeToString: typeToString,
-            getSymbolDisplayBuilder: getSymbolDisplayBuilder,
-            symbolToString: symbolToString,
-            getAugmentedPropertiesOfType: getAugmentedPropertiesOfType,
-            getRootSymbols: getRootSymbols,
-            getContextualType: getContextualType,
-            getFullyQualifiedName: getFullyQualifiedName,
-            getResolvedSignature: getResolvedSignature,
-            getConstantValue: getConstantValue,
-            isValidPropertyAccess: isValidPropertyAccess,
-            getSignatureFromDeclaration: getSignatureFromDeclaration,
-            isImplementationOfOverload: isImplementationOfOverload,
-            getAliasedSymbol: resolveAlias,
-            getEmitResolver: getEmitResolver,
-            getExportsOfModule: getExportsOfModuleAsArray,
-            getAmbientModules: getAmbientModules,
-            getJsxElementAttributesType: getJsxElementAttributesType,
-            getJsxIntrinsicTagNames: getJsxIntrinsicTagNames,
-            isOptionalParameter: isOptionalParameter
-        };
-        var tupleTypes = [];
-        var unionTypes = ts.createMap();
-        var intersectionTypes = ts.createMap();
-        var stringLiteralTypes = ts.createMap();
-        var numericLiteralTypes = ts.createMap();
-        var unknownSymbol = createSymbol(4 /* Property */ | 67108864 /* Transient */, "unknown");
-        var resolvingSymbol = createSymbol(67108864 /* Transient */, "__resolving__");
-        var anyType = createIntrinsicType(1 /* Any */, "any");
-        var unknownType = createIntrinsicType(1 /* Any */, "unknown");
-        var undefinedType = createIntrinsicType(2048 /* Undefined */, "undefined");
-        var undefinedWideningType = strictNullChecks ? undefinedType : createIntrinsicType(2048 /* Undefined */ | 33554432 /* ContainsWideningType */, "undefined");
-        var nullType = createIntrinsicType(4096 /* Null */, "null");
-        var nullWideningType = strictNullChecks ? nullType : createIntrinsicType(4096 /* Null */ | 33554432 /* ContainsWideningType */, "null");
-        var stringType = createIntrinsicType(2 /* String */, "string");
-        var numberType = createIntrinsicType(4 /* Number */, "number");
-        var trueType = createIntrinsicType(128 /* BooleanLiteral */, "true");
-        var falseType = createIntrinsicType(128 /* BooleanLiteral */, "false");
-        var booleanType = createBooleanType([trueType, falseType]);
-        var esSymbolType = createIntrinsicType(512 /* ESSymbol */, "symbol");
-        var voidType = createIntrinsicType(1024 /* Void */, "void");
-        var neverType = createIntrinsicType(8192 /* Never */, "never");
-        var silentNeverType = createIntrinsicType(8192 /* Never */, "never");
-        var emptyObjectType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
-        var emptyGenericType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
-        emptyGenericType.instantiations = ts.createMap();
-        var anyFunctionType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
-        // The anyFunctionType contains the anyFunctionType by definition. The flag is further propagated
-        // in getPropagatingFlagsOfTypes, and it is checked in inferFromTypes.
-        anyFunctionType.flags |= 134217728 /* ContainsAnyFunctionType */;
-        var noConstraintType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
-        var anySignature = createSignature(undefined, undefined, undefined, emptyArray, anyType, /*typePredicate*/ undefined, 0, /*hasRestParameter*/ false, /*hasLiteralTypes*/ false);
-        var unknownSignature = createSignature(undefined, undefined, undefined, emptyArray, unknownType, /*typePredicate*/ undefined, 0, /*hasRestParameter*/ false, /*hasLiteralTypes*/ false);
-        var resolvingSignature = createSignature(undefined, undefined, undefined, emptyArray, anyType, /*typePredicate*/ undefined, 0, /*hasRestParameter*/ false, /*hasLiteralTypes*/ false);
-        var silentNeverSignature = createSignature(undefined, undefined, undefined, emptyArray, silentNeverType, /*typePredicate*/ undefined, 0, /*hasRestParameter*/ false, /*hasLiteralTypes*/ false);
-        var enumNumberIndexInfo = createIndexInfo(stringType, /*isReadonly*/ true);
-        var globals = ts.createMap();
         /**
-         * List of every ambient module with a "*" wildcard.
-         * Unlike other ambient modules, these can't be stored in `globals` because symbol tables only deal with exact matches.
-         * This is only used if there is no exact match.
-        */
-        var patternAmbientModules;
-        var getGlobalESSymbolConstructorSymbol;
-        var getGlobalPromiseConstructorSymbol;
-        var tryGetGlobalPromiseConstructorSymbol;
-        var globalObjectType;
-        var globalFunctionType;
-        var globalArrayType;
-        var globalReadonlyArrayType;
-        var globalStringType;
-        var globalNumberType;
-        var globalBooleanType;
-        var globalRegExpType;
-        var anyArrayType;
-        var anyReadonlyArrayType;
-        // The library files are only loaded when the feature is used.
-        // This allows users to just specify library files they want to used through --lib
-        // and they will not get an error from not having unrelated library files
-        var getGlobalTemplateStringsArrayType;
-        var getGlobalESSymbolType;
-        var getGlobalIterableType;
-        var getGlobalIteratorType;
-        var getGlobalIterableIteratorType;
-        var getGlobalClassDecoratorType;
-        var getGlobalParameterDecoratorType;
-        var getGlobalPropertyDecoratorType;
-        var getGlobalMethodDecoratorType;
-        var getGlobalTypedPropertyDescriptorType;
-        var getGlobalPromiseType;
-        var tryGetGlobalPromiseType;
-        var getGlobalPromiseLikeType;
-        var getInstantiatedGlobalPromiseLikeType;
-        var getGlobalPromiseConstructorLikeType;
-        var getGlobalThenableType;
-        var jsxElementClassType;
-        var deferredNodes;
-        var deferredUnusedIdentifierNodes;
-        var flowLoopStart = 0;
-        var flowLoopCount = 0;
-        var visitedFlowCount = 0;
-        var emptyStringType = getLiteralTypeForText(32 /* StringLiteral */, "");
-        var zeroType = getLiteralTypeForText(64 /* NumberLiteral */, "0");
-        var resolutionTargets = [];
-        var resolutionResults = [];
-        var resolutionPropertyNames = [];
-        var mergedSymbols = [];
-        var symbolLinks = [];
-        var nodeLinks = [];
-        var flowLoopCaches = [];
-        var flowLoopNodes = [];
-        var flowLoopKeys = [];
-        var flowLoopTypes = [];
-        var visitedFlowNodes = [];
-        var visitedFlowTypes = [];
-        var potentialThisCollisions = [];
-        var awaitedTypeStack = [];
-        var diagnostics = ts.createDiagnosticCollection();
-        var TypeFacts;
-        (function (TypeFacts) {
-            TypeFacts[TypeFacts["None"] = 0] = "None";
-            TypeFacts[TypeFacts["TypeofEQString"] = 1] = "TypeofEQString";
-            TypeFacts[TypeFacts["TypeofEQNumber"] = 2] = "TypeofEQNumber";
-            TypeFacts[TypeFacts["TypeofEQBoolean"] = 4] = "TypeofEQBoolean";
-            TypeFacts[TypeFacts["TypeofEQSymbol"] = 8] = "TypeofEQSymbol";
-            TypeFacts[TypeFacts["TypeofEQObject"] = 16] = "TypeofEQObject";
-            TypeFacts[TypeFacts["TypeofEQFunction"] = 32] = "TypeofEQFunction";
-            TypeFacts[TypeFacts["TypeofEQHostObject"] = 64] = "TypeofEQHostObject";
-            TypeFacts[TypeFacts["TypeofNEString"] = 128] = "TypeofNEString";
-            TypeFacts[TypeFacts["TypeofNENumber"] = 256] = "TypeofNENumber";
-            TypeFacts[TypeFacts["TypeofNEBoolean"] = 512] = "TypeofNEBoolean";
-            TypeFacts[TypeFacts["TypeofNESymbol"] = 1024] = "TypeofNESymbol";
-            TypeFacts[TypeFacts["TypeofNEObject"] = 2048] = "TypeofNEObject";
-            TypeFacts[TypeFacts["TypeofNEFunction"] = 4096] = "TypeofNEFunction";
-            TypeFacts[TypeFacts["TypeofNEHostObject"] = 8192] = "TypeofNEHostObject";
-            TypeFacts[TypeFacts["EQUndefined"] = 16384] = "EQUndefined";
-            TypeFacts[TypeFacts["EQNull"] = 32768] = "EQNull";
-            TypeFacts[TypeFacts["EQUndefinedOrNull"] = 65536] = "EQUndefinedOrNull";
-            TypeFacts[TypeFacts["NEUndefined"] = 131072] = "NEUndefined";
-            TypeFacts[TypeFacts["NENull"] = 262144] = "NENull";
-            TypeFacts[TypeFacts["NEUndefinedOrNull"] = 524288] = "NEUndefinedOrNull";
-            TypeFacts[TypeFacts["Truthy"] = 1048576] = "Truthy";
-            TypeFacts[TypeFacts["Falsy"] = 2097152] = "Falsy";
-            TypeFacts[TypeFacts["Discriminatable"] = 4194304] = "Discriminatable";
-            TypeFacts[TypeFacts["All"] = 8388607] = "All";
-            // The following members encode facts about particular kinds of types for use in the getTypeFacts function.
-            // The presence of a particular fact means that the given test is true for some (and possibly all) values
-            // of that kind of type.
-            TypeFacts[TypeFacts["BaseStringStrictFacts"] = 933633] = "BaseStringStrictFacts";
-            TypeFacts[TypeFacts["BaseStringFacts"] = 3145473] = "BaseStringFacts";
-            TypeFacts[TypeFacts["StringStrictFacts"] = 4079361] = "StringStrictFacts";
-            TypeFacts[TypeFacts["StringFacts"] = 4194049] = "StringFacts";
-            TypeFacts[TypeFacts["EmptyStringStrictFacts"] = 3030785] = "EmptyStringStrictFacts";
-            TypeFacts[TypeFacts["EmptyStringFacts"] = 3145473] = "EmptyStringFacts";
-            TypeFacts[TypeFacts["NonEmptyStringStrictFacts"] = 1982209] = "NonEmptyStringStrictFacts";
-            TypeFacts[TypeFacts["NonEmptyStringFacts"] = 4194049] = "NonEmptyStringFacts";
-            TypeFacts[TypeFacts["BaseNumberStrictFacts"] = 933506] = "BaseNumberStrictFacts";
-            TypeFacts[TypeFacts["BaseNumberFacts"] = 3145346] = "BaseNumberFacts";
-            TypeFacts[TypeFacts["NumberStrictFacts"] = 4079234] = "NumberStrictFacts";
-            TypeFacts[TypeFacts["NumberFacts"] = 4193922] = "NumberFacts";
-            TypeFacts[TypeFacts["ZeroStrictFacts"] = 3030658] = "ZeroStrictFacts";
-            TypeFacts[TypeFacts["ZeroFacts"] = 3145346] = "ZeroFacts";
-            TypeFacts[TypeFacts["NonZeroStrictFacts"] = 1982082] = "NonZeroStrictFacts";
-            TypeFacts[TypeFacts["NonZeroFacts"] = 4193922] = "NonZeroFacts";
-            TypeFacts[TypeFacts["BaseBooleanStrictFacts"] = 933252] = "BaseBooleanStrictFacts";
-            TypeFacts[TypeFacts["BaseBooleanFacts"] = 3145092] = "BaseBooleanFacts";
-            TypeFacts[TypeFacts["BooleanStrictFacts"] = 4078980] = "BooleanStrictFacts";
-            TypeFacts[TypeFacts["BooleanFacts"] = 4193668] = "BooleanFacts";
-            TypeFacts[TypeFacts["FalseStrictFacts"] = 3030404] = "FalseStrictFacts";
-            TypeFacts[TypeFacts["FalseFacts"] = 3145092] = "FalseFacts";
-            TypeFacts[TypeFacts["TrueStrictFacts"] = 1981828] = "TrueStrictFacts";
-            TypeFacts[TypeFacts["TrueFacts"] = 4193668] = "TrueFacts";
-            TypeFacts[TypeFacts["SymbolStrictFacts"] = 1981320] = "SymbolStrictFacts";
-            TypeFacts[TypeFacts["SymbolFacts"] = 4193160] = "SymbolFacts";
-            TypeFacts[TypeFacts["ObjectStrictFacts"] = 6166480] = "ObjectStrictFacts";
-            TypeFacts[TypeFacts["ObjectFacts"] = 8378320] = "ObjectFacts";
-            TypeFacts[TypeFacts["FunctionStrictFacts"] = 6164448] = "FunctionStrictFacts";
-            TypeFacts[TypeFacts["FunctionFacts"] = 8376288] = "FunctionFacts";
-            TypeFacts[TypeFacts["UndefinedFacts"] = 2457472] = "UndefinedFacts";
-            TypeFacts[TypeFacts["NullFacts"] = 2340752] = "NullFacts";
-        })(TypeFacts || (TypeFacts = {}));
-        var typeofEQFacts = ts.createMap({
-            "string": 1 /* TypeofEQString */,
-            "number": 2 /* TypeofEQNumber */,
-            "boolean": 4 /* TypeofEQBoolean */,
-            "symbol": 8 /* TypeofEQSymbol */,
-            "undefined": 16384 /* EQUndefined */,
-            "object": 16 /* TypeofEQObject */,
-            "function": 32 /* TypeofEQFunction */
-        });
-        var typeofNEFacts = ts.createMap({
-            "string": 128 /* TypeofNEString */,
-            "number": 256 /* TypeofNENumber */,
-            "boolean": 512 /* TypeofNEBoolean */,
-            "symbol": 1024 /* TypeofNESymbol */,
-            "undefined": 131072 /* NEUndefined */,
-            "object": 2048 /* TypeofNEObject */,
-            "function": 4096 /* TypeofNEFunction */
-        });
-        var typeofTypesByName = ts.createMap({
-            "string": stringType,
-            "number": numberType,
-            "boolean": booleanType,
-            "symbol": esSymbolType,
-            "undefined": undefinedType
-        });
-        var jsxElementType;
-        /** Things we lazy load from the JSX namespace */
-        var jsxTypes = ts.createMap();
-        var JsxNames = {
-            JSX: "JSX",
-            IntrinsicElements: "IntrinsicElements",
-            ElementClass: "ElementClass",
-            ElementAttributesPropertyNameContainer: "ElementAttributesProperty",
-            Element: "Element",
-            IntrinsicAttributes: "IntrinsicAttributes",
-            IntrinsicClassAttributes: "IntrinsicClassAttributes"
-        };
-        var subtypeRelation = ts.createMap();
-        var assignableRelation = ts.createMap();
-        var comparableRelation = ts.createMap();
-        var identityRelation = ts.createMap();
-        var enumRelation = ts.createMap();
-        // This is for caching the result of getSymbolDisplayBuilder. Do not access directly.
-        var _displayBuilder;
-        var TypeSystemPropertyName;
-        (function (TypeSystemPropertyName) {
-            TypeSystemPropertyName[TypeSystemPropertyName["Type"] = 0] = "Type";
-            TypeSystemPropertyName[TypeSystemPropertyName["ResolvedBaseConstructorType"] = 1] = "ResolvedBaseConstructorType";
-            TypeSystemPropertyName[TypeSystemPropertyName["DeclaredType"] = 2] = "DeclaredType";
-            TypeSystemPropertyName[TypeSystemPropertyName["ResolvedReturnType"] = 3] = "ResolvedReturnType";
-        })(TypeSystemPropertyName || (TypeSystemPropertyName = {}));
-        var builtinGlobals = ts.createMap();
-        builtinGlobals[undefinedSymbol.name] = undefinedSymbol;
-        initializeTypeChecker();
-        return checker;
-        function getEmitResolver(sourceFile, cancellationToken) {
-            // Ensure we have all the type information in place for this file so that all the
-            // emitter questions of this resolver will return the right information.
-            getDiagnostics(sourceFile, cancellationToken);
-            return emitResolver;
-        }
-        function error(location, message, arg0, arg1, arg2) {
-            var diagnostic = location
-                ? ts.createDiagnosticForNode(location, message, arg0, arg1, arg2)
-                : ts.createCompilerDiagnostic(message, arg0, arg1, arg2);
-            diagnostics.add(diagnostic);
-        }
-        function createSymbol(flags, name) {
-            symbolCount++;
-            return new Symbol(flags, name);
-        }
-        function getExcludedSymbolFlags(flags) {
-            var result = 0;
-            if (flags & 2 /* BlockScopedVariable */)
-                result |= 107455 /* BlockScopedVariableExcludes */;
-            if (flags & 1 /* FunctionScopedVariable */)
-                result |= 107454 /* FunctionScopedVariableExcludes */;
-            if (flags & 4 /* Property */)
-                result |= 0 /* PropertyExcludes */;
-            if (flags & 8 /* EnumMember */)
-                result |= 900095 /* EnumMemberExcludes */;
-            if (flags & 16 /* Function */)
-                result |= 106927 /* FunctionExcludes */;
-            if (flags & 32 /* Class */)
-                result |= 899519 /* ClassExcludes */;
-            if (flags & 64 /* Interface */)
-                result |= 792968 /* InterfaceExcludes */;
-            if (flags & 256 /* RegularEnum */)
-                result |= 899327 /* RegularEnumExcludes */;
-            if (flags & 128 /* ConstEnum */)
-                result |= 899967 /* ConstEnumExcludes */;
-            if (flags & 512 /* ValueModule */)
-                result |= 106639 /* ValueModuleExcludes */;
-            if (flags & 8192 /* Method */)
-                result |= 99263 /* MethodExcludes */;
-            if (flags & 32768 /* GetAccessor */)
-                result |= 41919 /* GetAccessorExcludes */;
-            if (flags & 65536 /* SetAccessor */)
-                result |= 74687 /* SetAccessorExcludes */;
-            if (flags & 262144 /* TypeParameter */)
-                result |= 530920 /* TypeParameterExcludes */;
-            if (flags & 524288 /* TypeAlias */)
-                result |= 793064 /* TypeAliasExcludes */;
-            if (flags & 8388608 /* Alias */)
-                result |= 8388608 /* AliasExcludes */;
-            return result;
-        }
-        function recordMergedSymbol(target, source) {
-            if (!source.mergeId) {
-                source.mergeId = nextMergeId;
-                nextMergeId++;
+         * Get type from type-reference that reference to class or interface
+         */
+        function getTypeFromClassOrInterfaceReference(node, symbol, typeArgs) {
+            var type = getDeclaredTypeOfSymbol(getMergedSymbol(symbol));
+            var typeParameters = type.localTypeParameters;
+            if (typeParameters) {
+                var numTypeArguments = ts.length(node.typeArguments);
+                var minTypeArgumentCount = getMinTypeArgumentCount(typeParameters);
+                if (!ts.isInJavaScriptFile(node) && (numTypeArguments < minTypeArgumentCount || numTypeArguments > typeParameters.length)) {
+                    error(node, minTypeArgumentCount === typeParameters.length
+                        ? ts.Diagnostics.Generic_type_0_requires_1_type_argument_s
+                        : ts.Diagnostics.Generic_type_0_requires_between_1_and_2_type_arguments, typeToString(type, /*enclosingDeclaration*/ undefined, 1 /* WriteArrayAsGenericType */), minTypeArgumentCount, typeParameters.length);
+                    return unknownType;
+                }
+                // In a type reference, the outer type parameters of the referenced class or interface are automatically
+                // supplied as type arguments and the type reference only specifies arguments for the local type parameters
+                // of the class or interface.
+                var typeArguments = ts.concatenate(type.outerTypeParameters, fillMissingTypeArguments(typeArgs, typeParameters, minTypeArgumentCount, node));
+                return createTypeReference(type, typeArguments);
             }
-            mergedSymbols[source.mergeId] = target;
+            if (node.typeArguments) {
+                error(node, ts.Diagnostics.Type_0_is_not_generic, typeToString(type));
+                return unknownType;
+            }
+            return type;
         }
-        function cloneSymbol(symbol) {
-            var result = createSymbol(symbol.flags | 33554432 /* Merged */, symbol.name);
-            result.declarations = symbol.declarations.slice(0);
-            result.parent = symbol.parent;
-            if (symbol.valueDeclaration)
-                result.valueDeclaration = symbol.valueDeclaration;
-            if (symbol.constEnumOnlyModule)
-                result.constEnumOnlyModule = true;
-            if (symbol.members)
-                result.members = ts.cloneMap(symbol.members);
-            if (symbol.exports)
-                result.exports = ts.cloneMap(symbol.exports);
-            recordMergedSymbol(result, symbol);
-            return result;
+        function getTypeAliasInstantiation(symbol, typeArguments) {
+            var type = getDeclaredTypeOfSymbol(symbol);
+            var links = getSymbolLinks(symbol);
+            var typeParameters = links.typeParameters;
+            var id = getTypeListId(typeArguments);
+            var instantiation = links.instantiations.get(id);
+            if (!instantiation) {
+                links.instantiations.set(id, instantiation = instantiateTypeNoAlias(type, createTypeMapper(typeParameters, fillMissingTypeArguments(typeArguments, typeParameters, getMinTypeArgumentCount(typeParameters)))));
+            }
+            return instantiation;
         }
-        function mergeSymbol(target, source) {
-            if (!(target.flags & getExcludedSymbolFlags(source.flags))) {
-                if (source.flags & 512 /* ValueModule */ && target.flags & 512 /* ValueModule */ && target.constEnumOnlyModule && !source.constEnumOnlyModule) {
-                    // reset flag when merging instantiated module into value module that has only const enums
-                    target.constEnumOnlyModule = false;
-                }
-                target.flags |= source.flags;
-                if (source.valueDeclaration &&
-                    (!target.valueDeclaration ||
-                        (target.valueDeclaration.kind === 225 /* ModuleDeclaration */ && source.valueDeclaration.kind !== 225 /* ModuleDeclaration */))) {
-                    // other kinds of value declarations take precedence over modules
-                    target.valueDeclaration = source.valueDeclaration;
-                }
-                ts.forEach(source.declarations, function (node) {
-                    target.declarations.push(node);
-                });
-                if (source.members) {
-                    if (!target.members)
-                        target.members = ts.createMap();
-                    mergeSymbolTable(target.members, source.members);
-                }
-                if (source.exports) {
-                    if (!target.exports)
-                        target.exports = ts.createMap();
-                    mergeSymbolTable(target.exports, source.exports);
+        /**
+         * Get type from reference to type alias. When a type alias is generic, the declared type of the type alias may include
+         * references to the type parameters of the alias. We replace those with the actual type arguments by instantiating the
+         * declared type. Instantiations are cached using the type identities of the type arguments as the key.
+         */
+        function getTypeFromTypeAliasReference(node, symbol, typeArguments) {
+            var type = getDeclaredTypeOfSymbol(symbol);
+            var typeParameters = getSymbolLinks(symbol).typeParameters;
+            if (typeParameters) {
+                var numTypeArguments = ts.length(node.typeArguments);
+                var minTypeArgumentCount = getMinTypeArgumentCount(typeParameters);
+                if (numTypeArguments < minTypeArgumentCount || numTypeArguments > typeParameters.length) {
+                    error(node, minTypeArgumentCount === typeParameters.length
+                        ? ts.Diagnostics.Generic_type_0_requires_1_type_argument_s
+                        : ts.Diagnostics.Generic_type_0_requires_between_1_and_2_type_arguments, symbolToString(symbol), minTypeArgumentCount, typeParameters.length);
+                    return unknownType;
                 }
-                recordMergedSymbol(target, source);
+                return getTypeAliasInstantiation(symbol, typeArguments);
             }
-            else {
-                var message_2 = target.flags & 2 /* BlockScopedVariable */ || source.flags & 2 /* BlockScopedVariable */
-                    ? ts.Diagnostics.Cannot_redeclare_block_scoped_variable_0 : ts.Diagnostics.Duplicate_identifier_0;
-                ts.forEach(source.declarations, function (node) {
-                    error(node.name ? node.name : node, message_2, symbolToString(source));
-                });
-                ts.forEach(target.declarations, function (node) {
-                    error(node.name ? node.name : node, message_2, symbolToString(source));
-                });
+            if (node.typeArguments) {
+                error(node, ts.Diagnostics.Type_0_is_not_generic, symbolToString(symbol));
+                return unknownType;
+            }
+            return type;
+        }
+        /**
+         * Get type from reference to named type that cannot be generic (enum or type parameter)
+         */
+        function getTypeFromNonGenericTypeReference(node, symbol) {
+            if (node.typeArguments) {
+                error(node, ts.Diagnostics.Type_0_is_not_generic, symbolToString(symbol));
+                return unknownType;
+            }
+            return getDeclaredTypeOfSymbol(symbol);
+        }
+        function getTypeReferenceName(node) {
+            switch (node.kind) {
+                case 159 /* TypeReference */:
+                    return node.typeName;
+                case 277 /* JSDocTypeReference */:
+                    return node.name;
+                case 201 /* ExpressionWithTypeArguments */:
+                    // We only support expressions that are simple qualified names. For other
+                    // expressions this produces undefined.
+                    var expr = node.expression;
+                    if (ts.isEntityNameExpression(expr)) {
+                        return expr;
+                    }
             }
+            return undefined;
         }
-        function mergeSymbolTable(target, source) {
-            for (var id in source) {
-                var targetSymbol = target[id];
-                if (!targetSymbol) {
-                    target[id] = source[id];
-                }
-                else {
-                    if (!(targetSymbol.flags & 33554432 /* Merged */)) {
-                        target[id] = targetSymbol = cloneSymbol(targetSymbol);
-                    }
-                    mergeSymbol(targetSymbol, source[id]);
-                }
+        function resolveTypeReferenceName(typeReferenceName, meaning) {
+            if (!typeReferenceName) {
+                return unknownSymbol;
             }
+            return resolveEntityName(typeReferenceName, meaning) || unknownSymbol;
         }
-        function mergeModuleAugmentation(moduleName) {
-            var moduleAugmentation = moduleName.parent;
-            if (moduleAugmentation.symbol.declarations[0] !== moduleAugmentation) {
-                // this is a combined symbol for multiple augmentations within the same file.
-                // its symbol already has accumulated information for all declarations
-                // so we need to add it just once - do the work only for first declaration
-                ts.Debug.assert(moduleAugmentation.symbol.declarations.length > 1);
-                return;
+        function getTypeReferenceType(node, symbol) {
+            var typeArguments = typeArgumentsFromTypeReferenceNode(node); // Do unconditionally so we mark type arguments as referenced.
+            if (symbol === unknownSymbol) {
+                return unknownType;
             }
-            if (ts.isGlobalScopeAugmentation(moduleAugmentation)) {
-                mergeSymbolTable(globals, moduleAugmentation.symbol.exports);
+            var type = getTypeReferenceTypeWorker(node, symbol, typeArguments);
+            if (type) {
+                return type;
             }
-            else {
-                // find a module that about to be augmented
-                // do not validate names of augmentations that are defined in ambient context
-                var moduleNotFoundError = !ts.isInAmbientContext(moduleName.parent.parent)
-                    ? ts.Diagnostics.Invalid_module_name_in_augmentation_module_0_cannot_be_found
-                    : undefined;
-                var mainModule = resolveExternalModuleNameWorker(moduleName, moduleName, moduleNotFoundError);
-                if (!mainModule) {
-                    return;
-                }
-                // obtain item referenced by 'export='
-                mainModule = resolveExternalModuleSymbol(mainModule);
-                if (mainModule.flags & 1920 /* Namespace */) {
-                    // if module symbol has already been merged - it is safe to use it.
-                    // otherwise clone it
-                    mainModule = mainModule.flags & 33554432 /* Merged */ ? mainModule : cloneSymbol(mainModule);
-                    mergeSymbol(mainModule, moduleAugmentation.symbol);
+            if (symbol.flags & 107455 /* Value */ && node.kind === 277 /* JSDocTypeReference */) {
+                // A JSDocTypeReference may have resolved to a value (as opposed to a type). If
+                // the symbol is a constructor function, return the inferred class type; otherwise,
+                // the type of this reference is just the type of the value we resolved to.
+                var valueType = getTypeOfSymbol(symbol);
+                if (valueType.symbol && !isInferredClassType(valueType)) {
+                    var referenceType = getTypeReferenceTypeWorker(node, valueType.symbol, typeArguments);
+                    if (referenceType) {
+                        return referenceType;
+                    }
                 }
-                else {
-                    error(moduleName, ts.Diagnostics.Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity, moduleName.text);
+                // Resolve the type reference as a Type for the purpose of reporting errors.
+                resolveTypeReferenceName(getTypeReferenceName(node), 793064 /* Type */);
+                return valueType;
+            }
+            return getTypeFromNonGenericTypeReference(node, symbol);
+        }
+        function getTypeReferenceTypeWorker(node, symbol, typeArguments) {
+            if (symbol.flags & (32 /* Class */ | 64 /* Interface */)) {
+                return getTypeFromClassOrInterfaceReference(node, symbol, typeArguments);
+            }
+            if (symbol.flags & 524288 /* TypeAlias */) {
+                return getTypeFromTypeAliasReference(node, symbol, typeArguments);
+            }
+            if (symbol.flags & 16 /* Function */ && node.kind === 277 /* JSDocTypeReference */ && (symbol.members || ts.getJSDocClassTag(symbol.valueDeclaration))) {
+                return getInferredClassType(symbol);
+            }
+        }
+        function getPrimitiveTypeFromJSDocTypeReference(node) {
+            if (ts.isIdentifier(node.name)) {
+                switch (node.name.text) {
+                    case "String":
+                        return stringType;
+                    case "Number":
+                        return numberType;
+                    case "Boolean":
+                        return booleanType;
+                    case "Void":
+                        return voidType;
+                    case "Undefined":
+                        return undefinedType;
+                    case "Null":
+                        return nullType;
+                    case "Object":
+                        return anyType;
+                    case "Function":
+                    case "function":
+                        return globalFunctionType;
+                    case "Array":
+                    case "array":
+                        return !node.typeArguments || !node.typeArguments.length ? createArrayType(anyType) : undefined;
+                    case "Promise":
+                    case "promise":
+                        return !node.typeArguments || !node.typeArguments.length ? createPromiseType(anyType) : undefined;
                 }
             }
         }
-        function addToSymbolTable(target, source, message) {
-            for (var id in source) {
-                if (target[id]) {
-                    // Error on redeclarations
-                    ts.forEach(target[id].declarations, addDeclarationDiagnostic(id, message));
+        function getTypeFromJSDocNullableTypeNode(node) {
+            var type = getTypeFromTypeNode(node.type);
+            return strictNullChecks ? getUnionType([type, nullType]) : type;
+        }
+        function getTypeFromTypeReference(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                var symbol = void 0;
+                var type = void 0;
+                var meaning = 793064 /* Type */;
+                if (node.kind === 277 /* JSDocTypeReference */) {
+                    type = getPrimitiveTypeFromJSDocTypeReference(node);
+                    meaning |= 107455 /* Value */;
                 }
-                else {
-                    target[id] = source[id];
+                if (!type) {
+                    symbol = resolveTypeReferenceName(getTypeReferenceName(node), meaning);
+                    type = getTypeReferenceType(node, symbol);
                 }
+                // Cache both the resolved symbol and the resolved type. The resolved symbol is needed in when we check the
+                // type reference in checkTypeReferenceOrExpressionWithTypeArguments.
+                links.resolvedSymbol = symbol;
+                links.resolvedType = type;
             }
-            function addDeclarationDiagnostic(id, message) {
-                return function (declaration) { return diagnostics.add(ts.createDiagnosticForNode(declaration, message, id)); };
-            }
-        }
-        function getSymbolLinks(symbol) {
-            if (symbol.flags & 67108864 /* Transient */)
-                return symbol;
-            var id = getSymbolId(symbol);
-            return symbolLinks[id] || (symbolLinks[id] = {});
+            return links.resolvedType;
         }
-        function getNodeLinks(node) {
-            var nodeId = getNodeId(node);
-            return nodeLinks[nodeId] || (nodeLinks[nodeId] = { flags: 0 });
+        function typeArgumentsFromTypeReferenceNode(node) {
+            return ts.map(node.typeArguments, getTypeFromTypeNode);
         }
-        function isGlobalSourceFile(node) {
-            return node.kind === 256 /* SourceFile */ && !ts.isExternalOrCommonJsModule(node);
+        function getTypeFromTypeQueryNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                // TypeScript 1.0 spec (April 2014): 3.6.3
+                // The expression is processed as an identifier expression (section 4.3)
+                // or property access expression(section 4.10),
+                // the widened type(section 3.9) of which becomes the result.
+                links.resolvedType = getWidenedType(checkExpression(node.exprName));
+            }
+            return links.resolvedType;
         }
-        function getSymbol(symbols, name, meaning) {
-            if (meaning) {
-                var symbol = symbols[name];
-                if (symbol) {
-                    ts.Debug.assert((symbol.flags & 16777216 /* Instantiated */) === 0, "Should never get an instantiated symbol here.");
-                    if (symbol.flags & meaning) {
-                        return symbol;
-                    }
-                    if (symbol.flags & 8388608 /* Alias */) {
-                        var target = resolveAlias(symbol);
-                        // Unknown symbol means an error occurred in alias resolution, treat it as positive answer to avoid cascading errors
-                        if (target === unknownSymbol || target.flags & meaning) {
-                            return symbol;
-                        }
+        function getTypeOfGlobalSymbol(symbol, arity) {
+            function getTypeDeclaration(symbol) {
+                var declarations = symbol.declarations;
+                for (var _i = 0, declarations_4 = declarations; _i < declarations_4.length; _i++) {
+                    var declaration = declarations_4[_i];
+                    switch (declaration.kind) {
+                        case 229 /* ClassDeclaration */:
+                        case 230 /* InterfaceDeclaration */:
+                        case 232 /* EnumDeclaration */:
+                            return declaration;
                     }
                 }
             }
-            // return undefined if we can't find a symbol.
+            if (!symbol) {
+                return arity ? emptyGenericType : emptyObjectType;
+            }
+            var type = getDeclaredTypeOfSymbol(symbol);
+            if (!(type.flags & 32768 /* Object */)) {
+                error(getTypeDeclaration(symbol), ts.Diagnostics.Global_type_0_must_be_a_class_or_interface_type, symbol.name);
+                return arity ? emptyGenericType : emptyObjectType;
+            }
+            if (ts.length(type.typeParameters) !== arity) {
+                error(getTypeDeclaration(symbol), ts.Diagnostics.Global_type_0_must_have_1_type_parameter_s, symbol.name, arity);
+                return arity ? emptyGenericType : emptyObjectType;
+            }
+            return type;
+        }
+        function getGlobalValueSymbol(name, reportErrors) {
+            return getGlobalSymbol(name, 107455 /* Value */, reportErrors ? ts.Diagnostics.Cannot_find_global_value_0 : undefined);
+        }
+        function getGlobalTypeSymbol(name, reportErrors) {
+            return getGlobalSymbol(name, 793064 /* Type */, reportErrors ? ts.Diagnostics.Cannot_find_global_type_0 : undefined);
+        }
+        function getGlobalSymbol(name, meaning, diagnostic) {
+            return resolveName(undefined, name, meaning, diagnostic, name);
+        }
+        function getGlobalType(name, arity, reportErrors) {
+            var symbol = getGlobalTypeSymbol(name, reportErrors);
+            return symbol || reportErrors ? getTypeOfGlobalSymbol(symbol, arity) : undefined;
+        }
+        function getGlobalTypedPropertyDescriptorType() {
+            return deferredGlobalTypedPropertyDescriptorType || (deferredGlobalTypedPropertyDescriptorType = getGlobalType("TypedPropertyDescriptor", /*arity*/ 1, /*reportErrors*/ true)) || emptyGenericType;
+        }
+        function getGlobalTemplateStringsArrayType() {
+            return deferredGlobalTemplateStringsArrayType || (deferredGlobalTemplateStringsArrayType = getGlobalType("TemplateStringsArray", /*arity*/ 0, /*reportErrors*/ true)) || emptyObjectType;
+        }
+        function getGlobalESSymbolConstructorSymbol(reportErrors) {
+            return deferredGlobalESSymbolConstructorSymbol || (deferredGlobalESSymbolConstructorSymbol = getGlobalValueSymbol("Symbol", reportErrors));
+        }
+        function getGlobalESSymbolType(reportErrors) {
+            return deferredGlobalESSymbolType || (deferredGlobalESSymbolType = getGlobalType("Symbol", /*arity*/ 0, reportErrors)) || emptyObjectType;
+        }
+        function getGlobalPromiseType(reportErrors) {
+            return deferredGlobalPromiseType || (deferredGlobalPromiseType = getGlobalType("Promise", /*arity*/ 1, reportErrors)) || emptyGenericType;
+        }
+        function getGlobalPromiseConstructorSymbol(reportErrors) {
+            return deferredGlobalPromiseConstructorSymbol || (deferredGlobalPromiseConstructorSymbol = getGlobalValueSymbol("Promise", reportErrors));
+        }
+        function getGlobalPromiseConstructorLikeType(reportErrors) {
+            return deferredGlobalPromiseConstructorLikeType || (deferredGlobalPromiseConstructorLikeType = getGlobalType("PromiseConstructorLike", /*arity*/ 0, reportErrors)) || emptyObjectType;
+        }
+        function getGlobalAsyncIterableType(reportErrors) {
+            return deferredGlobalAsyncIterableType || (deferredGlobalAsyncIterableType = getGlobalType("AsyncIterable", /*arity*/ 1, reportErrors)) || emptyGenericType;
+        }
+        function getGlobalAsyncIteratorType(reportErrors) {
+            return deferredGlobalAsyncIteratorType || (deferredGlobalAsyncIteratorType = getGlobalType("AsyncIterator", /*arity*/ 1, reportErrors)) || emptyGenericType;
+        }
+        function getGlobalAsyncIterableIteratorType(reportErrors) {
+            return deferredGlobalAsyncIterableIteratorType || (deferredGlobalAsyncIterableIteratorType = getGlobalType("AsyncIterableIterator", /*arity*/ 1, reportErrors)) || emptyGenericType;
+        }
+        function getGlobalIterableType(reportErrors) {
+            return deferredGlobalIterableType || (deferredGlobalIterableType = getGlobalType("Iterable", /*arity*/ 1, reportErrors)) || emptyGenericType;
+        }
+        function getGlobalIteratorType(reportErrors) {
+            return deferredGlobalIteratorType || (deferredGlobalIteratorType = getGlobalType("Iterator", /*arity*/ 1, reportErrors)) || emptyGenericType;
+        }
+        function getGlobalIterableIteratorType(reportErrors) {
+            return deferredGlobalIterableIteratorType || (deferredGlobalIterableIteratorType = getGlobalType("IterableIterator", /*arity*/ 1, reportErrors)) || emptyGenericType;
+        }
+        function getGlobalTypeOrUndefined(name, arity) {
+            if (arity === void 0) { arity = 0; }
+            var symbol = getGlobalSymbol(name, 793064 /* Type */, /*diagnostic*/ undefined);
+            return symbol && getTypeOfGlobalSymbol(symbol, arity);
         }
         /**
-         * Get symbols that represent parameter-property-declaration as parameter and as property declaration
-         * @param parameter a parameterDeclaration node
-         * @param parameterName a name of the parameter to get the symbols for.
-         * @return a tuple of two symbols
+         * Returns a type that is inside a namespace at the global scope, e.g.
+         * getExportedTypeFromNamespace('JSX', 'Element') returns the JSX.Element type
          */
-        function getSymbolsOfParameterPropertyDeclaration(parameter, parameterName) {
-            var constructorDeclaration = parameter.parent;
-            var classDeclaration = parameter.parent.parent;
-            var parameterSymbol = getSymbol(constructorDeclaration.locals, parameterName, 107455 /* Value */);
-            var propertySymbol = getSymbol(classDeclaration.symbol.members, parameterName, 107455 /* Value */);
-            if (parameterSymbol && propertySymbol) {
-                return [parameterSymbol, propertySymbol];
+        function getExportedTypeFromNamespace(namespace, name) {
+            var namespaceSymbol = getGlobalSymbol(namespace, 1920 /* Namespace */, /*diagnosticMessage*/ undefined);
+            var typeSymbol = namespaceSymbol && getSymbol(namespaceSymbol.exports, name, 793064 /* Type */);
+            return typeSymbol && getDeclaredTypeOfSymbol(typeSymbol);
+        }
+        /**
+         * Instantiates a global type that is generic with some element type, and returns that instantiation.
+         */
+        function createTypeFromGenericGlobalType(genericGlobalType, typeArguments) {
+            return genericGlobalType !== emptyGenericType ? createTypeReference(genericGlobalType, typeArguments) : emptyObjectType;
+        }
+        function createTypedPropertyDescriptorType(propertyType) {
+            return createTypeFromGenericGlobalType(getGlobalTypedPropertyDescriptorType(), [propertyType]);
+        }
+        function createAsyncIterableType(iteratedType) {
+            return createTypeFromGenericGlobalType(getGlobalAsyncIterableType(/*reportErrors*/ true), [iteratedType]);
+        }
+        function createAsyncIterableIteratorType(iteratedType) {
+            return createTypeFromGenericGlobalType(getGlobalAsyncIterableIteratorType(/*reportErrors*/ true), [iteratedType]);
+        }
+        function createIterableType(iteratedType) {
+            return createTypeFromGenericGlobalType(getGlobalIterableType(/*reportErrors*/ true), [iteratedType]);
+        }
+        function createIterableIteratorType(iteratedType) {
+            return createTypeFromGenericGlobalType(getGlobalIterableIteratorType(/*reportErrors*/ true), [iteratedType]);
+        }
+        function createArrayType(elementType) {
+            return createTypeFromGenericGlobalType(globalArrayType, [elementType]);
+        }
+        function getTypeFromArrayTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = createArrayType(getTypeFromTypeNode(node.elementType));
             }
-            ts.Debug.fail("There should exist two symbols, one as property declaration and one as parameter declaration");
+            return links.resolvedType;
         }
-        function isBlockScopedNameDeclaredBeforeUse(declaration, usage) {
-            var declarationFile = ts.getSourceFileOfNode(declaration);
-            var useFile = ts.getSourceFileOfNode(usage);
-            if (declarationFile !== useFile) {
-                if ((modulekind && (declarationFile.externalModuleIndicator || useFile.externalModuleIndicator)) ||
-                    (!compilerOptions.outFile && !compilerOptions.out)) {
-                    // nodes are in different files and order cannot be determines
-                    return true;
-                }
-                var sourceFiles = host.getSourceFiles();
-                return ts.indexOf(sourceFiles, declarationFile) <= ts.indexOf(sourceFiles, useFile);
+        // We represent tuple types as type references to synthesized generic interface types created by
+        // this function. The types are of the form:
+        //
+        //   interface Tuple<T0, T1, T2, ...> extends Array<T0 | T1 | T2 | ...> { 0: T0, 1: T1, 2: T2, ... }
+        //
+        // Note that the generic type created by this function has no symbol associated with it. The same
+        // is true for each of the synthesized type parameters.
+        function createTupleTypeOfArity(arity) {
+            var typeParameters = [];
+            var properties = [];
+            for (var i = 0; i < arity; i++) {
+                var typeParameter = createType(16384 /* TypeParameter */);
+                typeParameters.push(typeParameter);
+                var property = createSymbol(4 /* Property */, "" + i);
+                property.type = typeParameter;
+                properties.push(property);
             }
-            if (declaration.pos <= usage.pos) {
-                // declaration is before usage
-                // still might be illegal if usage is in the initializer of the variable declaration
-                return declaration.kind !== 218 /* VariableDeclaration */ ||
-                    !isImmediatelyUsedInInitializerOfBlockScopedVariable(declaration, usage);
+            var type = createObjectType(8 /* Tuple */ | 4 /* Reference */);
+            type.typeParameters = typeParameters;
+            type.outerTypeParameters = undefined;
+            type.localTypeParameters = typeParameters;
+            type.instantiations = ts.createMap();
+            type.instantiations.set(getTypeListId(type.typeParameters), type);
+            type.target = type;
+            type.typeArguments = type.typeParameters;
+            type.thisType = createType(16384 /* TypeParameter */);
+            type.thisType.isThisType = true;
+            type.thisType.constraint = type;
+            type.declaredProperties = properties;
+            type.declaredCallSignatures = emptyArray;
+            type.declaredConstructSignatures = emptyArray;
+            type.declaredStringIndexInfo = undefined;
+            type.declaredNumberIndexInfo = undefined;
+            return type;
+        }
+        function getTupleTypeOfArity(arity) {
+            return tupleTypes[arity] || (tupleTypes[arity] = createTupleTypeOfArity(arity));
+        }
+        function createTupleType(elementTypes) {
+            return createTypeReference(getTupleTypeOfArity(elementTypes.length), elementTypes);
+        }
+        function getTypeFromTupleTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = createTupleType(ts.map(node.elementTypes, getTypeFromTypeNode));
             }
-            // declaration is after usage
-            // can be legal if usage is deferred (i.e. inside function or in initializer of instance property)
-            return isUsedInFunctionOrNonStaticProperty(declaration, usage);
-            function isImmediatelyUsedInInitializerOfBlockScopedVariable(declaration, usage) {
-                var container = ts.getEnclosingBlockScopeContainer(declaration);
-                switch (declaration.parent.parent.kind) {
-                    case 200 /* VariableStatement */:
-                    case 206 /* ForStatement */:
-                    case 208 /* ForOfStatement */:
-                        // variable statement/for/for-of statement case,
-                        // use site should not be inside variable declaration (initializer of declaration or binding element)
-                        if (isSameScopeDescendentOf(usage, declaration, container)) {
-                            return true;
-                        }
-                        break;
+            return links.resolvedType;
+        }
+        function binarySearchTypes(types, type) {
+            var low = 0;
+            var high = types.length - 1;
+            var typeId = type.id;
+            while (low <= high) {
+                var middle = low + ((high - low) >> 1);
+                var id = types[middle].id;
+                if (id === typeId) {
+                    return middle;
                 }
-                switch (declaration.parent.parent.kind) {
-                    case 207 /* ForInStatement */:
-                    case 208 /* ForOfStatement */:
-                        // ForIn/ForOf case - use site should not be used in expression part
-                        if (isSameScopeDescendentOf(usage, declaration.parent.parent.expression, container)) {
-                            return true;
-                        }
+                else if (id > typeId) {
+                    high = middle - 1;
                 }
-                return false;
-            }
-            function isUsedInFunctionOrNonStaticProperty(declaration, usage) {
-                var container = ts.getEnclosingBlockScopeContainer(declaration);
-                var current = usage;
-                while (current) {
-                    if (current === container) {
-                        return false;
-                    }
-                    if (ts.isFunctionLike(current)) {
-                        return true;
-                    }
-                    var initializerOfNonStaticProperty = current.parent &&
-                        current.parent.kind === 145 /* PropertyDeclaration */ &&
-                        (ts.getModifierFlags(current.parent) & 32 /* Static */) === 0 &&
-                        current.parent.initializer === current;
-                    if (initializerOfNonStaticProperty) {
-                        return true;
-                    }
-                    current = current.parent;
+                else {
+                    low = middle + 1;
                 }
-                return false;
             }
+            return ~low;
         }
-        // Resolve a given name for a given meaning at a given location. An error is reported if the name was not found and
-        // the nameNotFoundMessage argument is not undefined. Returns the resolved symbol, or undefined if no symbol with
-        // the given name can be found.
-        function resolveName(location, name, meaning, nameNotFoundMessage, nameArg) {
-            var result;
-            var lastLocation;
-            var propertyWithInvalidInitializer;
-            var errorLocation = location;
-            var grandparent;
-            var isInExternalModule = false;
-            loop: while (location) {
-                // Locals of a source file are not in scope (because they get merged into the global symbol table)
-                if (location.locals && !isGlobalSourceFile(location)) {
-                    if (result = getSymbol(location.locals, name, meaning)) {
-                        var useResult = true;
-                        if (ts.isFunctionLike(location) && lastLocation && lastLocation !== location.body) {
-                            // symbol lookup restrictions for function-like declarations
-                            // - Type parameters of a function are in scope in the entire function declaration, including the parameter
-                            //   list and return type. However, local types are only in scope in the function body.
-                            // - parameters are only in the scope of function body
-                            // This restriction does not apply to JSDoc comment types because they are parented
-                            // at a higher level than type parameters would normally be
-                            if (meaning & result.flags & 793064 /* Type */ && lastLocation.kind !== 273 /* JSDocComment */) {
-                                useResult = result.flags & 262144 /* TypeParameter */
-                                    ? lastLocation === location.type ||
-                                        lastLocation.kind === 142 /* Parameter */ ||
-                                        lastLocation.kind === 141 /* TypeParameter */
-                                    : false;
-                            }
-                            if (meaning & 107455 /* Value */ && result.flags & 1 /* FunctionScopedVariable */) {
-                                // parameters are visible only inside function body, parameter list and return type
-                                // technically for parameter list case here we might mix parameters and variables declared in function,
-                                // however it is detected separately when checking initializers of parameters
-                                // to make sure that they reference no variables declared after them.
-                                useResult =
-                                    lastLocation.kind === 142 /* Parameter */ ||
-                                        (lastLocation === location.type &&
-                                            result.valueDeclaration.kind === 142 /* Parameter */);
-                            }
-                        }
-                        if (useResult) {
-                            break loop;
-                        }
-                        else {
-                            result = undefined;
-                        }
-                    }
-                }
-                switch (location.kind) {
-                    case 256 /* SourceFile */:
-                        if (!ts.isExternalOrCommonJsModule(location))
-                            break;
-                        isInExternalModule = true;
-                    case 225 /* ModuleDeclaration */:
-                        var moduleExports = getSymbolOfNode(location).exports;
-                        if (location.kind === 256 /* SourceFile */ || ts.isAmbientModule(location)) {
-                            // It's an external module. First see if the module has an export default and if the local
-                            // name of that export default matches.
-                            if (result = moduleExports["default"]) {
-                                var localSymbol = ts.getLocalSymbolForExportDefault(result);
-                                if (localSymbol && (result.flags & meaning) && localSymbol.name === name) {
-                                    break loop;
-                                }
-                                result = undefined;
-                            }
-                            // Because of module/namespace merging, a module's exports are in scope,
-                            // yet we never want to treat an export specifier as putting a member in scope.
-                            // Therefore, if the name we find is purely an export specifier, it is not actually considered in scope.
-                            // Two things to note about this:
-                            //     1. We have to check this without calling getSymbol. The problem with calling getSymbol
-                            //        on an export specifier is that it might find the export specifier itself, and try to
-                            //        resolve it as an alias. This will cause the checker to consider the export specifier
-                            //        a circular alias reference when it might not be.
-                            //     2. We check === SymbolFlags.Alias in order to check that the symbol is *purely*
-                            //        an alias. If we used &, we'd be throwing out symbols that have non alias aspects,
-                            //        which is not the desired behavior.
-                            if (moduleExports[name] &&
-                                moduleExports[name].flags === 8388608 /* Alias */ &&
-                                ts.getDeclarationOfKind(moduleExports[name], 238 /* ExportSpecifier */)) {
-                                break;
-                            }
-                        }
-                        if (result = getSymbol(moduleExports, name, meaning & 8914931 /* ModuleMember */)) {
-                            break loop;
-                        }
-                        break;
-                    case 224 /* EnumDeclaration */:
-                        if (result = getSymbol(getSymbolOfNode(location).exports, name, meaning & 8 /* EnumMember */)) {
-                            break loop;
-                        }
-                        break;
-                    case 145 /* PropertyDeclaration */:
-                    case 144 /* PropertySignature */:
-                        // TypeScript 1.0 spec (April 2014): 8.4.1
-                        // Initializer expressions for instance member variables are evaluated in the scope
-                        // of the class constructor body but are not permitted to reference parameters or
-                        // local variables of the constructor. This effectively means that entities from outer scopes
-                        // by the same name as a constructor parameter or local variable are inaccessible
-                        // in initializer expressions for instance member variables.
-                        if (ts.isClassLike(location.parent) && !(ts.getModifierFlags(location) & 32 /* Static */)) {
-                            var ctor = findConstructorDeclaration(location.parent);
-                            if (ctor && ctor.locals) {
-                                if (getSymbol(ctor.locals, name, meaning & 107455 /* Value */)) {
-                                    // Remember the property node, it will be used later to report appropriate error
-                                    propertyWithInvalidInitializer = location;
-                                }
-                            }
-                        }
-                        break;
-                    case 221 /* ClassDeclaration */:
-                    case 192 /* ClassExpression */:
-                    case 222 /* InterfaceDeclaration */:
-                        if (result = getSymbol(getSymbolOfNode(location).members, name, meaning & 793064 /* Type */)) {
-                            if (lastLocation && ts.getModifierFlags(lastLocation) & 32 /* Static */) {
-                                // TypeScript 1.0 spec (April 2014): 3.4.1
-                                // The scope of a type parameter extends over the entire declaration with which the type
-                                // parameter list is associated, with the exception of static member declarations in classes.
-                                error(errorLocation, ts.Diagnostics.Static_members_cannot_reference_class_type_parameters);
-                                return undefined;
-                            }
-                            break loop;
-                        }
-                        if (location.kind === 192 /* ClassExpression */ && meaning & 32 /* Class */) {
-                            var className = location.name;
-                            if (className && name === className.text) {
-                                result = location.symbol;
-                                break loop;
-                            }
-                        }
-                        break;
-                    // It is not legal to reference a class's own type parameters from a computed property name that
-                    // belongs to the class. For example:
-                    //
-                    //   function foo<T>() { return '' }
-                    //   class C<T> { // <-- Class's own type parameter T
-                    //       [foo<T>()]() { } // <-- Reference to T from class's own computed property
-                    //   }
-                    //
-                    case 140 /* ComputedPropertyName */:
-                        grandparent = location.parent.parent;
-                        if (ts.isClassLike(grandparent) || grandparent.kind === 222 /* InterfaceDeclaration */) {
-                            // A reference to this grandparent's type parameters would be an error
-                            if (result = getSymbol(getSymbolOfNode(grandparent).members, name, meaning & 793064 /* Type */)) {
-                                error(errorLocation, ts.Diagnostics.A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type);
-                                return undefined;
-                            }
-                        }
-                        break;
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                    case 148 /* Constructor */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                    case 220 /* FunctionDeclaration */:
-                    case 180 /* ArrowFunction */:
-                        if (meaning & 3 /* Variable */ && name === "arguments") {
-                            result = argumentsSymbol;
-                            break loop;
-                        }
-                        break;
-                    case 179 /* FunctionExpression */:
-                        if (meaning & 3 /* Variable */ && name === "arguments") {
-                            result = argumentsSymbol;
-                            break loop;
-                        }
-                        if (meaning & 16 /* Function */) {
-                            var functionName = location.name;
-                            if (functionName && name === functionName.text) {
-                                result = location.symbol;
-                                break loop;
-                            }
-                        }
-                        break;
-                    case 143 /* Decorator */:
-                        // Decorators are resolved at the class declaration. Resolving at the parameter
-                        // or member would result in looking up locals in the method.
-                        //
-                        //   function y() {}
-                        //   class C {
-                        //       method(@y x, y) {} // <-- decorator y should be resolved at the class declaration, not the parameter.
-                        //   }
-                        //
-                        if (location.parent && location.parent.kind === 142 /* Parameter */) {
-                            location = location.parent;
-                        }
-                        //
-                        //   function y() {}
-                        //   class C {
-                        //       @y method(x, y) {} // <-- decorator y should be resolved at the class declaration, not the method.
-                        //   }
-                        //
-                        if (location.parent && ts.isClassElement(location.parent)) {
-                            location = location.parent;
-                        }
-                        break;
-                }
-                lastLocation = location;
-                location = location.parent;
-            }
-            if (result && nameNotFoundMessage && noUnusedIdentifiers) {
-                result.isReferenced = true;
-            }
-            if (!result) {
-                result = getSymbol(globals, name, meaning);
-            }
-            if (!result) {
-                if (nameNotFoundMessage) {
-                    if (!errorLocation ||
-                        !checkAndReportErrorForMissingPrefix(errorLocation, name, nameArg) &&
-                            !checkAndReportErrorForExtendingInterface(errorLocation) &&
-                            !checkAndReportErrorForUsingTypeAsValue(errorLocation, name, meaning)) {
-                        error(errorLocation, nameNotFoundMessage, typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg));
-                    }
-                }
-                return undefined;
+        function containsType(types, type) {
+            return binarySearchTypes(types, type) >= 0;
+        }
+        function addTypeToUnion(typeSet, type) {
+            var flags = type.flags;
+            if (flags & 65536 /* Union */) {
+                addTypesToUnion(typeSet, type.types);
             }
-            // Perform extra checks only if error reporting was requested
-            if (nameNotFoundMessage) {
-                if (propertyWithInvalidInitializer) {
-                    // We have a match, but the reference occurred within a property initializer and the identifier also binds
-                    // to a local variable in the constructor where the code will be emitted.
-                    var propertyName = propertyWithInvalidInitializer.name;
-                    error(errorLocation, ts.Diagnostics.Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor, ts.declarationNameToString(propertyName), typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg));
-                    return undefined;
-                }
-                // Only check for block-scoped variable if we are looking for the
-                // name with variable meaning
-                //      For example,
-                //          declare module foo {
-                //              interface bar {}
-                //          }
-                //      const foo/*1*/: foo/*2*/.bar;
-                // The foo at /*1*/ and /*2*/ will share same symbol with two meaning
-                // block - scope variable and namespace module. However, only when we
-                // try to resolve name in /*1*/ which is used in variable position,
-                // we want to check for block- scoped
-                if (meaning & 2 /* BlockScopedVariable */) {
-                    var exportOrLocalSymbol = getExportSymbolOfValueSymbolIfExported(result);
-                    if (exportOrLocalSymbol.flags & 2 /* BlockScopedVariable */) {
-                        checkResolvedBlockScopedVariable(exportOrLocalSymbol, errorLocation);
-                    }
-                }
-                // If we're in an external module, we can't reference value symbols created from UMD export declarations
-                if (result && isInExternalModule && (meaning & 107455 /* Value */) === 107455 /* Value */) {
-                    var decls = result.declarations;
-                    if (decls && decls.length === 1 && decls[0].kind === 228 /* NamespaceExportDeclaration */) {
-                        error(errorLocation, ts.Diagnostics.Identifier_0_must_be_imported_from_a_module, name);
-                    }
-                }
+            else if (flags & 1 /* Any */) {
+                typeSet.containsAny = true;
             }
-            return result;
-        }
-        function checkAndReportErrorForMissingPrefix(errorLocation, name, nameArg) {
-            if ((errorLocation.kind === 69 /* Identifier */ && (isTypeReferenceIdentifier(errorLocation)) || isInTypeQuery(errorLocation))) {
-                return false;
+            else if (!strictNullChecks && flags & 6144 /* Nullable */) {
+                if (flags & 2048 /* Undefined */)
+                    typeSet.containsUndefined = true;
+                if (flags & 4096 /* Null */)
+                    typeSet.containsNull = true;
+                if (!(flags & 2097152 /* ContainsWideningType */))
+                    typeSet.containsNonWideningType = true;
             }
-            var container = ts.getThisContainer(errorLocation, /* includeArrowFunctions */ true);
-            var location = container;
-            while (location) {
-                if (ts.isClassLike(location.parent)) {
-                    var classSymbol = getSymbolOfNode(location.parent);
-                    if (!classSymbol) {
-                        break;
-                    }
-                    // Check to see if a static member exists.
-                    var constructorType = getTypeOfSymbol(classSymbol);
-                    if (getPropertyOfType(constructorType, name)) {
-                        error(errorLocation, ts.Diagnostics.Cannot_find_name_0_Did_you_mean_the_static_member_1_0, typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg), symbolToString(classSymbol));
-                        return true;
-                    }
-                    // No static member is present.
-                    // Check if we're in an instance method and look for a relevant instance member.
-                    if (location === container && !(ts.getModifierFlags(location) & 32 /* Static */)) {
-                        var instanceType = getDeclaredTypeOfSymbol(classSymbol).thisType;
-                        if (getPropertyOfType(instanceType, name)) {
-                            error(errorLocation, ts.Diagnostics.Cannot_find_name_0_Did_you_mean_the_instance_member_this_0, typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg));
-                            return true;
-                        }
+            else if (!(flags & 8192 /* Never */)) {
+                if (flags & 2 /* String */)
+                    typeSet.containsString = true;
+                if (flags & 4 /* Number */)
+                    typeSet.containsNumber = true;
+                if (flags & 96 /* StringOrNumberLiteral */)
+                    typeSet.containsStringOrNumberLiteral = true;
+                var len = typeSet.length;
+                var index = len && type.id > typeSet[len - 1].id ? ~len : binarySearchTypes(typeSet, type);
+                if (index < 0) {
+                    if (!(flags & 32768 /* Object */ && type.objectFlags & 16 /* Anonymous */ &&
+                        type.symbol && type.symbol.flags & (16 /* Function */ | 8192 /* Method */) && containsIdenticalType(typeSet, type))) {
+                        typeSet.splice(~index, 0, type);
                     }
                 }
-                location = location.parent;
             }
-            return false;
         }
-        function checkAndReportErrorForExtendingInterface(errorLocation) {
-            var expression = getEntityNameForExtendingInterface(errorLocation);
-            var isError = !!(expression && resolveEntityName(expression, 64 /* Interface */, /*ignoreErrors*/ true));
-            if (isError) {
-                error(errorLocation, ts.Diagnostics.Cannot_extend_an_interface_0_Did_you_mean_implements, ts.getTextOfNode(expression));
+        // Add the given types to the given type set. Order is preserved, duplicates are removed,
+        // and nested types of the given kind are flattened into the set.
+        function addTypesToUnion(typeSet, types) {
+            for (var _i = 0, types_5 = types; _i < types_5.length; _i++) {
+                var type = types_5[_i];
+                addTypeToUnion(typeSet, type);
             }
-            return isError;
         }
-        /**
-         * Climbs up parents to an ExpressionWithTypeArguments, and returns its expression,
-         * but returns undefined if that expression is not an EntityNameExpression.
-         */
-        function getEntityNameForExtendingInterface(node) {
-            switch (node.kind) {
-                case 69 /* Identifier */:
-                case 172 /* PropertyAccessExpression */:
-                    return node.parent ? getEntityNameForExtendingInterface(node.parent) : undefined;
-                case 194 /* ExpressionWithTypeArguments */:
-                    ts.Debug.assert(ts.isEntityNameExpression(node.expression));
-                    return node.expression;
-                default:
-                    return undefined;
+        function containsIdenticalType(types, type) {
+            for (var _i = 0, types_6 = types; _i < types_6.length; _i++) {
+                var t = types_6[_i];
+                if (isTypeIdenticalTo(t, type)) {
+                    return true;
+                }
             }
+            return false;
         }
-        function checkAndReportErrorForUsingTypeAsValue(errorLocation, name, meaning) {
-            if (meaning & (107455 /* Value */ & ~1024 /* NamespaceModule */)) {
-                var symbol = resolveSymbol(resolveName(errorLocation, name, 793064 /* Type */ & ~107455 /* Value */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined));
-                if (symbol && !(symbol.flags & 1024 /* NamespaceModule */)) {
-                    error(errorLocation, ts.Diagnostics._0_only_refers_to_a_type_but_is_being_used_as_a_value_here, name);
+        function isSubtypeOfAny(candidate, types) {
+            for (var _i = 0, types_7 = types; _i < types_7.length; _i++) {
+                var type = types_7[_i];
+                if (candidate !== type && isTypeSubtypeOf(candidate, type)) {
                     return true;
                 }
             }
             return false;
         }
-        function checkResolvedBlockScopedVariable(result, errorLocation) {
-            ts.Debug.assert((result.flags & 2 /* BlockScopedVariable */) !== 0);
-            // Block-scoped variables cannot be used before their definition
-            var declaration = ts.forEach(result.declarations, function (d) { return ts.isBlockOrCatchScoped(d) ? d : undefined; });
-            ts.Debug.assert(declaration !== undefined, "Block-scoped variable declaration is undefined");
-            if (!ts.isInAmbientContext(declaration) && !isBlockScopedNameDeclaredBeforeUse(ts.getAncestor(declaration, 218 /* VariableDeclaration */), errorLocation)) {
-                error(errorLocation, ts.Diagnostics.Block_scoped_variable_0_used_before_its_declaration, ts.declarationNameToString(declaration.name));
+        function isSetOfLiteralsFromSameEnum(types) {
+            var first = types[0];
+            if (first.flags & 256 /* EnumLiteral */) {
+                var firstEnum = getParentOfSymbol(first.symbol);
+                for (var i = 1; i < types.length; i++) {
+                    var other = types[i];
+                    if (!(other.flags & 256 /* EnumLiteral */) || (firstEnum !== getParentOfSymbol(other.symbol))) {
+                        return false;
+                    }
+                }
+                return true;
             }
+            return false;
         }
-        /* Starting from 'initial' node walk up the parent chain until 'stopAt' node is reached.
-         * If at any point current node is equal to 'parent' node - return true.
-         * Return false if 'stopAt' node is reached or isFunctionLike(current) === true.
-         */
-        function isSameScopeDescendentOf(initial, parent, stopAt) {
-            if (!parent) {
-                return false;
+        function removeSubtypes(types) {
+            if (types.length === 0 || isSetOfLiteralsFromSameEnum(types)) {
+                return;
             }
-            for (var current = initial; current && current !== stopAt && !ts.isFunctionLike(current); current = current.parent) {
-                if (current === parent) {
-                    return true;
+            var i = types.length;
+            while (i > 0) {
+                i--;
+                if (isSubtypeOfAny(types[i], types)) {
+                    ts.orderedRemoveItemAt(types, i);
                 }
             }
-            return false;
         }
-        function getAnyImportSyntax(node) {
-            if (ts.isAliasSymbolDeclaration(node)) {
-                if (node.kind === 229 /* ImportEqualsDeclaration */) {
-                    return node;
-                }
-                while (node && node.kind !== 230 /* ImportDeclaration */) {
-                    node = node.parent;
+        function removeRedundantLiteralTypes(types) {
+            var i = types.length;
+            while (i > 0) {
+                i--;
+                var t = types[i];
+                var remove = t.flags & 32 /* StringLiteral */ && types.containsString ||
+                    t.flags & 64 /* NumberLiteral */ && types.containsNumber ||
+                    t.flags & 96 /* StringOrNumberLiteral */ && t.flags & 1048576 /* FreshLiteral */ && containsType(types, t.regularType);
+                if (remove) {
+                    ts.orderedRemoveItemAt(types, i);
                 }
-                return node;
             }
         }
-        function getDeclarationOfAliasSymbol(symbol) {
-            return ts.forEach(symbol.declarations, function (d) { return ts.isAliasSymbolDeclaration(d) ? d : undefined; });
+        // We sort and deduplicate the constituent types based on object identity. If the subtypeReduction
+        // flag is specified we also reduce the constituent type set to only include types that aren't subtypes
+        // of other types. Subtype reduction is expensive for large union types and is possible only when union
+        // types are known not to circularly reference themselves (as is the case with union types created by
+        // expression constructs such as array literals and the || and ?: operators). Named types can
+        // circularly reference themselves and therefore cannot be subtype reduced during their declaration.
+        // For example, "type Item = string | (() => Item" is a named type that circularly references itself.
+        function getUnionType(types, subtypeReduction, aliasSymbol, aliasTypeArguments) {
+            if (types.length === 0) {
+                return neverType;
+            }
+            if (types.length === 1) {
+                return types[0];
+            }
+            var typeSet = [];
+            addTypesToUnion(typeSet, types);
+            if (typeSet.containsAny) {
+                return anyType;
+            }
+            if (subtypeReduction) {
+                removeSubtypes(typeSet);
+            }
+            else if (typeSet.containsStringOrNumberLiteral) {
+                removeRedundantLiteralTypes(typeSet);
+            }
+            if (typeSet.length === 0) {
+                return typeSet.containsNull ? typeSet.containsNonWideningType ? nullType : nullWideningType :
+                    typeSet.containsUndefined ? typeSet.containsNonWideningType ? undefinedType : undefinedWideningType :
+                        neverType;
+            }
+            return getUnionTypeFromSortedList(typeSet, aliasSymbol, aliasTypeArguments);
         }
-        function getTargetOfImportEqualsDeclaration(node) {
-            if (node.moduleReference.kind === 240 /* ExternalModuleReference */) {
-                return resolveExternalModuleSymbol(resolveExternalModuleName(node, ts.getExternalModuleImportEqualsDeclarationExpression(node)));
+        // This function assumes the constituent type list is sorted and deduplicated.
+        function getUnionTypeFromSortedList(types, aliasSymbol, aliasTypeArguments) {
+            if (types.length === 0) {
+                return neverType;
+            }
+            if (types.length === 1) {
+                return types[0];
+            }
+            var id = getTypeListId(types);
+            var type = unionTypes.get(id);
+            if (!type) {
+                var propagatedFlags = getPropagatingFlagsOfTypes(types, /*excludeKinds*/ 6144 /* Nullable */);
+                type = createType(65536 /* Union */ | propagatedFlags);
+                unionTypes.set(id, type);
+                type.types = types;
+                type.aliasSymbol = aliasSymbol;
+                type.aliasTypeArguments = aliasTypeArguments;
             }
-            return getSymbolOfPartOfRightHandSideOfImportEquals(node.moduleReference, node);
+            return type;
         }
-        function getTargetOfImportClause(node) {
-            var moduleSymbol = resolveExternalModuleName(node, node.parent.moduleSpecifier);
-            if (moduleSymbol) {
-                var exportDefaultSymbol = ts.isShorthandAmbientModuleSymbol(moduleSymbol) ?
-                    moduleSymbol :
-                    moduleSymbol.exports["export="] ?
-                        getPropertyOfType(getTypeOfSymbol(moduleSymbol.exports["export="]), "default") :
-                        resolveSymbol(moduleSymbol.exports["default"]);
-                if (!exportDefaultSymbol && !allowSyntheticDefaultImports) {
-                    error(node.name, ts.Diagnostics.Module_0_has_no_default_export, symbolToString(moduleSymbol));
+        function getTypeFromUnionTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = getUnionType(ts.map(node.types, getTypeFromTypeNode), /*subtypeReduction*/ false, getAliasSymbolForTypeNode(node), getAliasTypeArgumentsForTypeNode(node));
+            }
+            return links.resolvedType;
+        }
+        function addTypeToIntersection(typeSet, type) {
+            if (type.flags & 131072 /* Intersection */) {
+                addTypesToIntersection(typeSet, type.types);
+            }
+            else if (type.flags & 1 /* Any */) {
+                typeSet.containsAny = true;
+            }
+            else if (type.flags & 8192 /* Never */) {
+                typeSet.containsNever = true;
+            }
+            else if (getObjectFlags(type) & 16 /* Anonymous */ && isEmptyObjectType(type)) {
+                typeSet.containsEmptyObject = true;
+            }
+            else if ((strictNullChecks || !(type.flags & 6144 /* Nullable */)) && !ts.contains(typeSet, type)) {
+                if (type.flags & 32768 /* Object */) {
+                    typeSet.containsObjectType = true;
                 }
-                else if (!exportDefaultSymbol && allowSyntheticDefaultImports) {
-                    return resolveExternalModuleSymbol(moduleSymbol) || resolveSymbol(moduleSymbol);
+                if (type.flags & 65536 /* Union */ && typeSet.unionIndex === undefined) {
+                    typeSet.unionIndex = typeSet.length;
+                }
+                if (!(type.flags & 32768 /* Object */ && type.objectFlags & 16 /* Anonymous */ &&
+                    type.symbol && type.symbol.flags & (16 /* Function */ | 8192 /* Method */) && containsIdenticalType(typeSet, type))) {
+                    typeSet.push(type);
                 }
-                return exportDefaultSymbol;
             }
         }
-        function getTargetOfNamespaceImport(node) {
-            var moduleSpecifier = node.parent.parent.moduleSpecifier;
-            return resolveESModuleSymbol(resolveExternalModuleName(node, moduleSpecifier), moduleSpecifier);
+        // Add the given types to the given type set. Order is preserved, duplicates are removed,
+        // and nested types of the given kind are flattened into the set.
+        function addTypesToIntersection(typeSet, types) {
+            for (var _i = 0, types_8 = types; _i < types_8.length; _i++) {
+                var type = types_8[_i];
+                addTypeToIntersection(typeSet, type);
+            }
         }
-        // This function creates a synthetic symbol that combines the value side of one symbol with the
-        // type/namespace side of another symbol. Consider this example:
-        //
-        //   declare module graphics {
-        //       interface Point {
-        //           x: number;
-        //           y: number;
-        //       }
-        //   }
-        //   declare var graphics: {
-        //       Point: new (x: number, y: number) => graphics.Point;
-        //   }
-        //   declare module "graphics" {
-        //       export = graphics;
-        //   }
+        // We normalize combinations of intersection and union types based on the distributive property of the '&'
+        // operator. Specifically, because X & (A | B) is equivalent to X & A | X & B, we can transform intersection
+        // types with union type constituents into equivalent union types with intersection type constituents and
+        // effectively ensure that union types are always at the top level in type representations.
         //
-        // An 'import { Point } from "graphics"' needs to create a symbol that combines the value side 'Point'
-        // property with the type/namespace side interface 'Point'.
-        function combineValueAndTypeSymbols(valueSymbol, typeSymbol) {
-            if (valueSymbol.flags & (793064 /* Type */ | 1920 /* Namespace */)) {
-                return valueSymbol;
+        // We do not perform structural deduplication on intersection types. Intersection types are created only by the &
+        // type operator and we can't reduce those because we want to support recursive intersection types. For example,
+        // a type alias of the form "type List<T> = T & { next: List<T> }" cannot be reduced during its declaration.
+        // Also, unlike union types, the order of the constituent types is preserved in order that overload resolution
+        // for intersections of types with signatures can be deterministic.
+        function getIntersectionType(types, aliasSymbol, aliasTypeArguments) {
+            if (types.length === 0) {
+                return emptyObjectType;
             }
-            var result = createSymbol(valueSymbol.flags | typeSymbol.flags, valueSymbol.name);
-            result.declarations = ts.concatenate(valueSymbol.declarations, typeSymbol.declarations);
-            result.parent = valueSymbol.parent || typeSymbol.parent;
-            if (valueSymbol.valueDeclaration)
-                result.valueDeclaration = valueSymbol.valueDeclaration;
-            if (typeSymbol.members)
-                result.members = typeSymbol.members;
-            if (valueSymbol.exports)
-                result.exports = valueSymbol.exports;
-            return result;
-        }
-        function getExportOfModule(symbol, name) {
-            if (symbol.flags & 1536 /* Module */) {
-                var exportedSymbol = getExportsOfSymbol(symbol)[name];
-                if (exportedSymbol) {
-                    return resolveSymbol(exportedSymbol);
-                }
+            var typeSet = [];
+            addTypesToIntersection(typeSet, types);
+            if (typeSet.containsNever) {
+                return neverType;
+            }
+            if (typeSet.containsAny) {
+                return anyType;
+            }
+            if (typeSet.containsEmptyObject && !typeSet.containsObjectType) {
+                typeSet.push(emptyObjectType);
             }
+            if (typeSet.length === 1) {
+                return typeSet[0];
+            }
+            var unionIndex = typeSet.unionIndex;
+            if (unionIndex !== undefined) {
+                // We are attempting to construct a type of the form X & (A | B) & Y. Transform this into a type of
+                // the form X & A & Y | X & B & Y and recursively reduce until no union type constituents remain.
+                var unionType = typeSet[unionIndex];
+                return getUnionType(ts.map(unionType.types, function (t) { return getIntersectionType(ts.replaceElement(typeSet, unionIndex, t)); }), 
+                /*subtypeReduction*/ false, aliasSymbol, aliasTypeArguments);
+            }
+            var id = getTypeListId(typeSet);
+            var type = intersectionTypes.get(id);
+            if (!type) {
+                var propagatedFlags = getPropagatingFlagsOfTypes(typeSet, /*excludeKinds*/ 6144 /* Nullable */);
+                type = createType(131072 /* Intersection */ | propagatedFlags);
+                intersectionTypes.set(id, type);
+                type.types = typeSet;
+                type.aliasSymbol = aliasSymbol;
+                type.aliasTypeArguments = aliasTypeArguments;
+            }
+            return type;
         }
-        function getPropertyOfVariable(symbol, name) {
-            if (symbol.flags & 3 /* Variable */) {
-                var typeAnnotation = symbol.valueDeclaration.type;
-                if (typeAnnotation) {
-                    return resolveSymbol(getPropertyOfType(getTypeFromTypeNode(typeAnnotation), name));
-                }
+        function getTypeFromIntersectionTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = getIntersectionType(ts.map(node.types, getTypeFromTypeNode), getAliasSymbolForTypeNode(node), getAliasTypeArgumentsForTypeNode(node));
             }
+            return links.resolvedType;
         }
-        function getExternalModuleMember(node, specifier) {
-            var moduleSymbol = resolveExternalModuleName(node, node.moduleSpecifier);
-            var targetSymbol = resolveESModuleSymbol(moduleSymbol, node.moduleSpecifier);
-            if (targetSymbol) {
-                var name_13 = specifier.propertyName || specifier.name;
-                if (name_13.text) {
-                    if (ts.isShorthandAmbientModuleSymbol(moduleSymbol)) {
-                        return moduleSymbol;
-                    }
-                    var symbolFromVariable = void 0;
-                    // First check if module was specified with "export=". If so, get the member from the resolved type
-                    if (moduleSymbol && moduleSymbol.exports && moduleSymbol.exports["export="]) {
-                        symbolFromVariable = getPropertyOfType(getTypeOfSymbol(targetSymbol), name_13.text);
-                    }
-                    else {
-                        symbolFromVariable = getPropertyOfVariable(targetSymbol, name_13.text);
-                    }
-                    // if symbolFromVariable is export - get its final target
-                    symbolFromVariable = resolveSymbol(symbolFromVariable);
-                    var symbolFromModule = getExportOfModule(targetSymbol, name_13.text);
-                    // If the export member we're looking for is default, and there is no real default but allowSyntheticDefaultImports is on, return the entire module as the default
-                    if (!symbolFromModule && allowSyntheticDefaultImports && name_13.text === "default") {
-                        symbolFromModule = resolveExternalModuleSymbol(moduleSymbol) || resolveSymbol(moduleSymbol);
-                    }
-                    var symbol = symbolFromModule && symbolFromVariable ?
-                        combineValueAndTypeSymbols(symbolFromVariable, symbolFromModule) :
-                        symbolFromModule || symbolFromVariable;
-                    if (!symbol) {
-                        error(name_13, ts.Diagnostics.Module_0_has_no_exported_member_1, getFullyQualifiedName(moduleSymbol), ts.declarationNameToString(name_13));
-                    }
-                    return symbol;
-                }
+        function getIndexTypeForGenericType(type) {
+            if (!type.resolvedIndexType) {
+                type.resolvedIndexType = createType(262144 /* Index */);
+                type.resolvedIndexType.type = type;
             }
+            return type.resolvedIndexType;
         }
-        function getTargetOfImportSpecifier(node) {
-            return getExternalModuleMember(node.parent.parent.parent, node);
+        function getLiteralTypeFromPropertyName(prop) {
+            return ts.getDeclarationModifierFlagsFromSymbol(prop) & 24 /* NonPublicAccessibilityModifier */ || ts.startsWith(prop.name, "__@") ?
+                neverType :
+                getLiteralType(ts.unescapeIdentifier(prop.name));
         }
-        function getTargetOfNamespaceExportDeclaration(node) {
-            return resolveExternalModuleSymbol(node.parent.symbol);
+        function getLiteralTypeFromPropertyNames(type) {
+            return getUnionType(ts.map(getPropertiesOfType(type), getLiteralTypeFromPropertyName));
         }
-        function getTargetOfExportSpecifier(node) {
-            return node.parent.parent.moduleSpecifier ?
-                getExternalModuleMember(node.parent.parent, node) :
-                resolveEntityName(node.propertyName || node.name, 107455 /* Value */ | 793064 /* Type */ | 1920 /* Namespace */);
+        function getIndexType(type) {
+            return maybeTypeOfKind(type, 540672 /* TypeVariable */) ? getIndexTypeForGenericType(type) :
+                getObjectFlags(type) & 32 /* Mapped */ ? getConstraintTypeFromMappedType(type) :
+                    type.flags & 1 /* Any */ || getIndexInfoOfType(type, 0 /* String */) ? stringType :
+                        getLiteralTypeFromPropertyNames(type);
         }
-        function getTargetOfExportAssignment(node) {
-            return resolveEntityName(node.expression, 107455 /* Value */ | 793064 /* Type */ | 1920 /* Namespace */);
+        function getIndexTypeOrString(type) {
+            var indexType = getIndexType(type);
+            return indexType !== neverType ? indexType : stringType;
         }
-        function getTargetOfAliasDeclaration(node) {
-            switch (node.kind) {
-                case 229 /* ImportEqualsDeclaration */:
-                    return getTargetOfImportEqualsDeclaration(node);
-                case 231 /* ImportClause */:
-                    return getTargetOfImportClause(node);
-                case 232 /* NamespaceImport */:
-                    return getTargetOfNamespaceImport(node);
-                case 234 /* ImportSpecifier */:
-                    return getTargetOfImportSpecifier(node);
-                case 238 /* ExportSpecifier */:
-                    return getTargetOfExportSpecifier(node);
-                case 235 /* ExportAssignment */:
-                    return getTargetOfExportAssignment(node);
-                case 228 /* NamespaceExportDeclaration */:
-                    return getTargetOfNamespaceExportDeclaration(node);
-            }
-        }
-        function resolveSymbol(symbol) {
-            return symbol && symbol.flags & 8388608 /* Alias */ && !(symbol.flags & (107455 /* Value */ | 793064 /* Type */ | 1920 /* Namespace */)) ? resolveAlias(symbol) : symbol;
+        function getTypeFromTypeOperatorNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = getIndexType(getTypeFromTypeNode(node.type));
+            }
+            return links.resolvedType;
         }
-        function resolveAlias(symbol) {
-            ts.Debug.assert((symbol.flags & 8388608 /* Alias */) !== 0, "Should only get Alias here.");
-            var links = getSymbolLinks(symbol);
-            if (!links.target) {
-                links.target = resolvingSymbol;
-                var node = getDeclarationOfAliasSymbol(symbol);
-                ts.Debug.assert(!!node);
-                var target = getTargetOfAliasDeclaration(node);
-                if (links.target === resolvingSymbol) {
-                    links.target = target || unknownSymbol;
-                }
-                else {
-                    error(node, ts.Diagnostics.Circular_definition_of_import_alias_0, symbolToString(symbol));
+        function createIndexedAccessType(objectType, indexType) {
+            var type = createType(524288 /* IndexedAccess */);
+            type.objectType = objectType;
+            type.indexType = indexType;
+            return type;
+        }
+        function getPropertyTypeForIndexType(objectType, indexType, accessNode, cacheSymbol) {
+            var accessExpression = accessNode && accessNode.kind === 180 /* ElementAccessExpression */ ? accessNode : undefined;
+            var propName = indexType.flags & 96 /* StringOrNumberLiteral */ ?
+                "" + indexType.value :
+                accessExpression && checkThatExpressionIsProperSymbolReference(accessExpression.argumentExpression, indexType, /*reportError*/ false) ?
+                    ts.getPropertyNameForKnownSymbolName(accessExpression.argumentExpression.name.text) :
+                    undefined;
+            if (propName !== undefined) {
+                var prop = getPropertyOfType(objectType, propName);
+                if (prop) {
+                    if (accessExpression) {
+                        if (ts.isAssignmentTarget(accessExpression) && (isReferenceToReadonlyEntity(accessExpression, prop) || isReferenceThroughNamespaceImport(accessExpression))) {
+                            error(accessExpression.argumentExpression, ts.Diagnostics.Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property, symbolToString(prop));
+                            return unknownType;
+                        }
+                        if (cacheSymbol) {
+                            getNodeLinks(accessNode).resolvedSymbol = prop;
+                        }
+                    }
+                    return getTypeOfSymbol(prop);
                 }
             }
-            else if (links.target === resolvingSymbol) {
-                links.target = unknownSymbol;
-            }
-            return links.target;
-        }
-        function markExportAsReferenced(node) {
-            var symbol = getSymbolOfNode(node);
-            var target = resolveAlias(symbol);
-            if (target) {
-                var markAlias = target === unknownSymbol ||
-                    ((target.flags & 107455 /* Value */) && !isConstEnumOrConstEnumOnlyModule(target));
-                if (markAlias) {
-                    markAliasSymbolAsReferenced(symbol);
+            if (isTypeAnyOrAllConstituentTypesHaveKind(indexType, 262178 /* StringLike */ | 84 /* NumberLike */ | 512 /* ESSymbol */)) {
+                if (isTypeAny(objectType)) {
+                    return anyType;
+                }
+                var indexInfo = isTypeAnyOrAllConstituentTypesHaveKind(indexType, 84 /* NumberLike */) && getIndexInfoOfType(objectType, 1 /* Number */) ||
+                    getIndexInfoOfType(objectType, 0 /* String */) ||
+                    undefined;
+                if (indexInfo) {
+                    if (accessExpression && indexInfo.isReadonly && (ts.isAssignmentTarget(accessExpression) || ts.isDeleteTarget(accessExpression))) {
+                        error(accessExpression, ts.Diagnostics.Index_signature_in_type_0_only_permits_reading, typeToString(objectType));
+                        return unknownType;
+                    }
+                    return indexInfo.type;
+                }
+                if (accessExpression && !isConstEnumObjectType(objectType)) {
+                    if (noImplicitAny && !compilerOptions.suppressImplicitAnyIndexErrors) {
+                        if (getIndexTypeOfType(objectType, 1 /* Number */)) {
+                            error(accessExpression.argumentExpression, ts.Diagnostics.Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number);
+                        }
+                        else {
+                            error(accessExpression, ts.Diagnostics.Element_implicitly_has_an_any_type_because_type_0_has_no_index_signature, typeToString(objectType));
+                        }
+                    }
+                    return anyType;
                 }
             }
-        }
-        // When an alias symbol is referenced, we need to mark the entity it references as referenced and in turn repeat that until
-        // we reach a non-alias or an exported entity (which is always considered referenced). We do this by checking the target of
-        // the alias as an expression (which recursively takes us back here if the target references another alias).
-        function markAliasSymbolAsReferenced(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.referenced) {
-                links.referenced = true;
-                var node = getDeclarationOfAliasSymbol(symbol);
-                ts.Debug.assert(!!node);
-                if (node.kind === 235 /* ExportAssignment */) {
-                    // export default <symbol>
-                    checkExpressionCached(node.expression);
+            if (accessNode) {
+                var indexNode = accessNode.kind === 180 /* ElementAccessExpression */ ? accessNode.argumentExpression : accessNode.indexType;
+                if (indexType.flags & (32 /* StringLiteral */ | 64 /* NumberLiteral */)) {
+                    error(indexNode, ts.Diagnostics.Property_0_does_not_exist_on_type_1, "" + indexType.value, typeToString(objectType));
                 }
-                else if (node.kind === 238 /* ExportSpecifier */) {
-                    // export { <symbol> } or export { <symbol> as foo }
-                    checkExpressionCached(node.propertyName || node.name);
+                else if (indexType.flags & (2 /* String */ | 4 /* Number */)) {
+                    error(indexNode, ts.Diagnostics.Type_0_has_no_matching_index_signature_for_type_1, typeToString(objectType), typeToString(indexType));
                 }
-                else if (ts.isInternalModuleImportEqualsDeclaration(node)) {
-                    // import foo = <symbol>
-                    checkExpressionCached(node.moduleReference);
+                else {
+                    error(indexNode, ts.Diagnostics.Type_0_cannot_be_used_as_an_index_type, typeToString(indexType));
                 }
+                return unknownType;
             }
+            return anyType;
         }
-        // This function is only for imports with entity names
-        function getSymbolOfPartOfRightHandSideOfImportEquals(entityName, importDeclaration, dontResolveAlias) {
-            // There are three things we might try to look for. In the following examples,
-            // the search term is enclosed in |...|:
-            //
-            //     import a = |b|; // Namespace
-            //     import a = |b.c|; // Value, type, namespace
-            //     import a = |b.c|.d; // Namespace
-            if (entityName.kind === 69 /* Identifier */ && ts.isRightSideOfQualifiedNameOrPropertyAccess(entityName)) {
-                entityName = entityName.parent;
+        function getIndexedAccessForMappedType(type, indexType, accessNode) {
+            var accessExpression = accessNode && accessNode.kind === 180 /* ElementAccessExpression */ ? accessNode : undefined;
+            if (accessExpression && ts.isAssignmentTarget(accessExpression) && type.declaration.readonlyToken) {
+                error(accessExpression, ts.Diagnostics.Index_signature_in_type_0_only_permits_reading, typeToString(type));
+                return unknownType;
             }
-            // Check for case 1 and 3 in the above example
-            if (entityName.kind === 69 /* Identifier */ || entityName.parent.kind === 139 /* QualifiedName */) {
-                return resolveEntityName(entityName, 1920 /* Namespace */, /*ignoreErrors*/ false, dontResolveAlias);
+            var mapper = createTypeMapper([getTypeParameterFromMappedType(type)], [indexType]);
+            var templateMapper = type.mapper ? combineTypeMappers(type.mapper, mapper) : mapper;
+            return instantiateType(getTemplateTypeFromMappedType(type), templateMapper);
+        }
+        function getIndexedAccessType(objectType, indexType, accessNode) {
+            // If the index type is generic, if the object type is generic and doesn't originate in an expression,
+            // or if the object type is a mapped type with a generic constraint, we are performing a higher-order
+            // index access where we cannot meaningfully access the properties of the object type. Note that for a
+            // generic T and a non-generic K, we eagerly resolve T[K] if it originates in an expression. This is to
+            // preserve backwards compatibility. For example, an element access 'this["foo"]' has always been resolved
+            // eagerly using the constraint type of 'this' at the given location.
+            if (maybeTypeOfKind(indexType, 540672 /* TypeVariable */ | 262144 /* Index */) ||
+                maybeTypeOfKind(objectType, 540672 /* TypeVariable */) && !(accessNode && accessNode.kind === 180 /* ElementAccessExpression */) ||
+                isGenericMappedType(objectType)) {
+                if (objectType.flags & 1 /* Any */) {
+                    return objectType;
+                }
+                // If the object type is a mapped type { [P in K]: E }, we instantiate E using a mapper that substitutes
+                // the index type for P. For example, for an index access { [P in K]: Box<T[P]> }[X], we construct the
+                // type Box<T[X]>.
+                if (isGenericMappedType(objectType)) {
+                    return getIndexedAccessForMappedType(objectType, indexType, accessNode);
+                }
+                // Otherwise we defer the operation by creating an indexed access type.
+                var id = objectType.id + "," + indexType.id;
+                var type = indexedAccessTypes.get(id);
+                if (!type) {
+                    indexedAccessTypes.set(id, type = createIndexedAccessType(objectType, indexType));
+                }
+                return type;
             }
-            else {
-                // Case 2 in above example
-                // entityName.kind could be a QualifiedName or a Missing identifier
-                ts.Debug.assert(entityName.parent.kind === 229 /* ImportEqualsDeclaration */);
-                return resolveEntityName(entityName, 107455 /* Value */ | 793064 /* Type */ | 1920 /* Namespace */, /*ignoreErrors*/ false, dontResolveAlias);
+            // In the following we resolve T[K] to the type of the property in T selected by K.
+            var apparentObjectType = getApparentType(objectType);
+            if (indexType.flags & 65536 /* Union */ && !(indexType.flags & 8190 /* Primitive */)) {
+                var propTypes = [];
+                for (var _i = 0, _a = indexType.types; _i < _a.length; _i++) {
+                    var t = _a[_i];
+                    var propType = getPropertyTypeForIndexType(apparentObjectType, t, accessNode, /*cacheSymbol*/ false);
+                    if (propType === unknownType) {
+                        return unknownType;
+                    }
+                    propTypes.push(propType);
+                }
+                return getUnionType(propTypes);
             }
+            return getPropertyTypeForIndexType(apparentObjectType, indexType, accessNode, /*cacheSymbol*/ true);
         }
-        function getFullyQualifiedName(symbol) {
-            return symbol.parent ? getFullyQualifiedName(symbol.parent) + "." + symbolToString(symbol) : symbolToString(symbol);
+        function getTypeFromIndexedAccessTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = getIndexedAccessType(getTypeFromTypeNode(node.objectType), getTypeFromTypeNode(node.indexType), node);
+            }
+            return links.resolvedType;
         }
-        // Resolves a qualified name and any involved aliases
-        function resolveEntityName(name, meaning, ignoreErrors, dontResolveAlias, location) {
-            if (ts.nodeIsMissing(name)) {
-                return undefined;
+        function getTypeFromMappedTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                var type = createObjectType(32 /* Mapped */, node.symbol);
+                type.declaration = node;
+                type.aliasSymbol = getAliasSymbolForTypeNode(node);
+                type.aliasTypeArguments = getAliasTypeArgumentsForTypeNode(node);
+                links.resolvedType = type;
+                // Eagerly resolve the constraint type which forces an error if the constraint type circularly
+                // references itself through one or more type aliases.
+                getConstraintTypeFromMappedType(type);
             }
-            var symbol;
-            if (name.kind === 69 /* Identifier */) {
-                var message = meaning === 1920 /* Namespace */ ? ts.Diagnostics.Cannot_find_namespace_0 : ts.Diagnostics.Cannot_find_name_0;
-                symbol = resolveName(location || name, name.text, meaning, ignoreErrors ? undefined : message, name);
-                if (!symbol) {
-                    return undefined;
+            return links.resolvedType;
+        }
+        function getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                // Deferred resolution of members is handled by resolveObjectTypeMembers
+                var aliasSymbol = getAliasSymbolForTypeNode(node);
+                if (node.symbol.members.size === 0 && !aliasSymbol) {
+                    links.resolvedType = emptyTypeLiteralType;
+                }
+                else {
+                    var type = createObjectType(16 /* Anonymous */, node.symbol);
+                    type.aliasSymbol = aliasSymbol;
+                    type.aliasTypeArguments = getAliasTypeArgumentsForTypeNode(node);
+                    links.resolvedType = type;
                 }
             }
-            else if (name.kind === 139 /* QualifiedName */ || name.kind === 172 /* PropertyAccessExpression */) {
-                var left = name.kind === 139 /* QualifiedName */ ? name.left : name.expression;
-                var right = name.kind === 139 /* QualifiedName */ ? name.right : name.name;
-                var namespace = resolveEntityName(left, 1920 /* Namespace */, ignoreErrors, /*dontResolveAlias*/ false, location);
-                if (!namespace || ts.nodeIsMissing(right)) {
-                    return undefined;
+            return links.resolvedType;
+        }
+        function getAliasSymbolForTypeNode(node) {
+            return node.parent.kind === 231 /* TypeAliasDeclaration */ ? getSymbolOfNode(node.parent) : undefined;
+        }
+        function getAliasTypeArgumentsForTypeNode(node) {
+            var symbol = getAliasSymbolForTypeNode(node);
+            return symbol ? getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol) : undefined;
+        }
+        /**
+         * Since the source of spread types are object literals, which are not binary,
+         * this function should be called in a left folding style, with left = previous result of getSpreadType
+         * and right = the new element to be spread.
+         */
+        function getSpreadType(left, right) {
+            if (left.flags & 1 /* Any */ || right.flags & 1 /* Any */) {
+                return anyType;
+            }
+            if (left.flags & 8192 /* Never */) {
+                return right;
+            }
+            if (right.flags & 8192 /* Never */) {
+                return left;
+            }
+            if (left.flags & 65536 /* Union */) {
+                return mapType(left, function (t) { return getSpreadType(t, right); });
+            }
+            if (right.flags & 65536 /* Union */) {
+                return mapType(right, function (t) { return getSpreadType(left, t); });
+            }
+            if (right.flags & 16777216 /* NonPrimitive */) {
+                return emptyObjectType;
+            }
+            var members = ts.createMap();
+            var skippedPrivateMembers = ts.createMap();
+            var stringIndexInfo;
+            var numberIndexInfo;
+            if (left === emptyObjectType) {
+                // for the first spread element, left === emptyObjectType, so take the right's string indexer
+                stringIndexInfo = getIndexInfoOfType(right, 0 /* String */);
+                numberIndexInfo = getIndexInfoOfType(right, 1 /* Number */);
+            }
+            else {
+                stringIndexInfo = unionSpreadIndexInfos(getIndexInfoOfType(left, 0 /* String */), getIndexInfoOfType(right, 0 /* String */));
+                numberIndexInfo = unionSpreadIndexInfos(getIndexInfoOfType(left, 1 /* Number */), getIndexInfoOfType(right, 1 /* Number */));
+            }
+            for (var _i = 0, _a = getPropertiesOfType(right); _i < _a.length; _i++) {
+                var rightProp = _a[_i];
+                // we approximate own properties as non-methods plus methods that are inside the object literal
+                var isSetterWithoutGetter = rightProp.flags & 65536 /* SetAccessor */ && !(rightProp.flags & 32768 /* GetAccessor */);
+                if (ts.getDeclarationModifierFlagsFromSymbol(rightProp) & (8 /* Private */ | 16 /* Protected */)) {
+                    skippedPrivateMembers.set(rightProp.name, true);
                 }
-                else if (namespace === unknownSymbol) {
-                    return namespace;
+                else if (!isClassMethod(rightProp) && !isSetterWithoutGetter) {
+                    members.set(rightProp.name, getNonReadonlySymbol(rightProp));
                 }
-                symbol = getSymbol(getExportsOfSymbol(namespace), right.text, meaning);
-                if (!symbol) {
-                    if (!ignoreErrors) {
-                        error(right, ts.Diagnostics.Namespace_0_has_no_exported_member_1, getFullyQualifiedName(namespace), ts.declarationNameToString(right));
+            }
+            for (var _b = 0, _c = getPropertiesOfType(left); _b < _c.length; _b++) {
+                var leftProp = _c[_b];
+                if (leftProp.flags & 65536 /* SetAccessor */ && !(leftProp.flags & 32768 /* GetAccessor */)
+                    || skippedPrivateMembers.has(leftProp.name)
+                    || isClassMethod(leftProp)) {
+                    continue;
+                }
+                if (members.has(leftProp.name)) {
+                    var rightProp = members.get(leftProp.name);
+                    var rightType = getTypeOfSymbol(rightProp);
+                    if (rightProp.flags & 67108864 /* Optional */) {
+                        var declarations = ts.concatenate(leftProp.declarations, rightProp.declarations);
+                        var flags = 4 /* Property */ | (leftProp.flags & 67108864 /* Optional */);
+                        var result = createSymbol(flags, leftProp.name);
+                        result.type = getUnionType([getTypeOfSymbol(leftProp), getTypeWithFacts(rightType, 131072 /* NEUndefined */)]);
+                        result.leftSpread = leftProp;
+                        result.rightSpread = rightProp;
+                        result.declarations = declarations;
+                        members.set(leftProp.name, result);
                     }
-                    return undefined;
+                }
+                else {
+                    members.set(leftProp.name, getNonReadonlySymbol(leftProp));
                 }
             }
-            else {
-                ts.Debug.fail("Unknown entity name kind.");
+            return createAnonymousType(undefined, members, emptyArray, emptyArray, stringIndexInfo, numberIndexInfo);
+        }
+        function getNonReadonlySymbol(prop) {
+            if (!isReadonlySymbol(prop)) {
+                return prop;
             }
-            ts.Debug.assert((symbol.flags & 16777216 /* Instantiated */) === 0, "Should never get an instantiated symbol here.");
-            return (symbol.flags & meaning) || dontResolveAlias ? symbol : resolveAlias(symbol);
+            var flags = 4 /* Property */ | (prop.flags & 67108864 /* Optional */);
+            var result = createSymbol(flags, prop.name);
+            result.type = getTypeOfSymbol(prop);
+            result.declarations = prop.declarations;
+            result.syntheticOrigin = prop;
+            return result;
         }
-        function resolveExternalModuleName(location, moduleReferenceExpression) {
-            return resolveExternalModuleNameWorker(location, moduleReferenceExpression, ts.Diagnostics.Cannot_find_module_0);
+        function isClassMethod(prop) {
+            return prop.flags & 8192 /* Method */ && ts.find(prop.declarations, function (decl) { return ts.isClassLike(decl.parent); });
         }
-        function resolveExternalModuleNameWorker(location, moduleReferenceExpression, moduleNotFoundError) {
-            if (moduleReferenceExpression.kind !== 9 /* StringLiteral */) {
-                return;
+        function createLiteralType(flags, value, symbol) {
+            var type = createType(flags);
+            type.symbol = symbol;
+            type.value = value;
+            return type;
+        }
+        function getFreshTypeOfLiteralType(type) {
+            if (type.flags & 96 /* StringOrNumberLiteral */ && !(type.flags & 1048576 /* FreshLiteral */)) {
+                if (!type.freshType) {
+                    var freshType = createLiteralType(type.flags | 1048576 /* FreshLiteral */, type.value, type.symbol);
+                    freshType.regularType = type;
+                    type.freshType = freshType;
+                }
+                return type.freshType;
             }
-            var moduleReferenceLiteral = moduleReferenceExpression;
-            return resolveExternalModule(location, moduleReferenceLiteral.text, moduleNotFoundError, moduleReferenceLiteral);
+            return type;
         }
-        function resolveExternalModule(location, moduleReference, moduleNotFoundError, errorNode) {
-            // Module names are escaped in our symbol table.  However, string literal values aren't.
-            // Escape the name in the "require(...)" clause to ensure we find the right symbol.
-            var moduleName = ts.escapeIdentifier(moduleReference);
-            if (moduleName === undefined) {
-                return;
+        function getRegularTypeOfLiteralType(type) {
+            return type.flags & 96 /* StringOrNumberLiteral */ && type.flags & 1048576 /* FreshLiteral */ ? type.regularType : type;
+        }
+        function getLiteralType(value, enumId, symbol) {
+            // We store all literal types in a single map with keys of the form '#NNN' and '@SSS',
+            // where NNN is the text representation of a numeric literal and SSS are the characters
+            // of a string literal. For literal enum members we use 'EEE#NNN' and 'EEE@SSS', where
+            // EEE is a unique id for the containing enum type.
+            var qualifier = typeof value === "number" ? "#" : "@";
+            var key = enumId ? enumId + qualifier + value : qualifier + value;
+            var type = literalTypes.get(key);
+            if (!type) {
+                var flags = (typeof value === "number" ? 64 /* NumberLiteral */ : 32 /* StringLiteral */) | (enumId ? 256 /* EnumLiteral */ : 0);
+                literalTypes.set(key, type = createLiteralType(flags, value, symbol));
             }
-            var isRelative = ts.isExternalModuleNameRelative(moduleName);
-            if (!isRelative) {
-                var symbol = getSymbol(globals, '"' + moduleName + '"', 512 /* ValueModule */);
-                if (symbol) {
-                    // merged symbol is module declaration symbol combined with all augmentations
-                    return getMergedSymbol(symbol);
-                }
+            return type;
+        }
+        function getTypeFromLiteralTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = getRegularTypeOfLiteralType(checkExpression(node.literal));
             }
-            var resolvedModule = ts.getResolvedModule(ts.getSourceFileOfNode(location), moduleReference);
-            var sourceFile = resolvedModule && host.getSourceFile(resolvedModule.resolvedFileName);
-            if (sourceFile) {
-                if (sourceFile.symbol) {
-                    // merged symbol is module declaration symbol combined with all augmentations
-                    return getMergedSymbol(sourceFile.symbol);
-                }
-                if (moduleNotFoundError) {
-                    // report errors only if it was requested
-                    error(errorNode, ts.Diagnostics.File_0_is_not_a_module, sourceFile.fileName);
-                }
-                return undefined;
+            return links.resolvedType;
+        }
+        function getTypeFromJSDocVariadicType(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                var type = getTypeFromTypeNode(node.type);
+                links.resolvedType = type ? createArrayType(type) : unknownType;
             }
-            if (patternAmbientModules) {
-                var pattern = ts.findBestPatternMatch(patternAmbientModules, function (_) { return _.pattern; }, moduleName);
-                if (pattern) {
-                    return getMergedSymbol(pattern.symbol);
+            return links.resolvedType;
+        }
+        function getTypeFromJSDocTupleType(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                var types = ts.map(node.types, getTypeFromTypeNode);
+                links.resolvedType = createTupleType(types);
+            }
+            return links.resolvedType;
+        }
+        function getThisType(node) {
+            var container = ts.getThisContainer(node, /*includeArrowFunctions*/ false);
+            var parent = container && container.parent;
+            if (parent && (ts.isClassLike(parent) || parent.kind === 230 /* InterfaceDeclaration */)) {
+                if (!(ts.getModifierFlags(container) & 32 /* Static */) &&
+                    (container.kind !== 152 /* Constructor */ || ts.isNodeDescendantOf(node, container.body))) {
+                    return getDeclaredTypeOfClassOrInterface(getSymbolOfNode(parent)).thisType;
                 }
             }
-            if (moduleNotFoundError) {
-                // report errors only if it was requested
-                var tsExtension = ts.tryExtractTypeScriptExtension(moduleName);
-                if (tsExtension) {
-                    var diag = ts.Diagnostics.An_import_path_cannot_end_with_a_0_extension_Consider_importing_1_instead;
-                    error(errorNode, diag, tsExtension, ts.removeExtension(moduleName, tsExtension));
-                }
-                else {
-                    error(errorNode, moduleNotFoundError, moduleName);
+            error(node, ts.Diagnostics.A_this_type_is_available_only_in_a_non_static_member_of_a_class_or_interface);
+            return unknownType;
+        }
+        function getTypeFromThisTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = getThisType(node);
+            }
+            return links.resolvedType;
+        }
+        function getTypeFromTypeNode(node) {
+            switch (node.kind) {
+                case 119 /* AnyKeyword */:
+                case 268 /* JSDocAllType */:
+                case 269 /* JSDocUnknownType */:
+                    return anyType;
+                case 136 /* StringKeyword */:
+                    return stringType;
+                case 133 /* NumberKeyword */:
+                    return numberType;
+                case 122 /* BooleanKeyword */:
+                    return booleanType;
+                case 137 /* SymbolKeyword */:
+                    return esSymbolType;
+                case 105 /* VoidKeyword */:
+                    return voidType;
+                case 139 /* UndefinedKeyword */:
+                    return undefinedType;
+                case 95 /* NullKeyword */:
+                    return nullType;
+                case 130 /* NeverKeyword */:
+                    return neverType;
+                case 134 /* ObjectKeyword */:
+                    return nonPrimitiveType;
+                case 169 /* ThisType */:
+                case 99 /* ThisKeyword */:
+                    return getTypeFromThisTypeNode(node);
+                case 173 /* LiteralType */:
+                    return getTypeFromLiteralTypeNode(node);
+                case 294 /* JSDocLiteralType */:
+                    return getTypeFromLiteralTypeNode(node.literal);
+                case 159 /* TypeReference */:
+                case 277 /* JSDocTypeReference */:
+                    return getTypeFromTypeReference(node);
+                case 158 /* TypePredicate */:
+                    return booleanType;
+                case 201 /* ExpressionWithTypeArguments */:
+                    return getTypeFromTypeReference(node);
+                case 162 /* TypeQuery */:
+                    return getTypeFromTypeQueryNode(node);
+                case 164 /* ArrayType */:
+                case 270 /* JSDocArrayType */:
+                    return getTypeFromArrayTypeNode(node);
+                case 165 /* TupleType */:
+                    return getTypeFromTupleTypeNode(node);
+                case 166 /* UnionType */:
+                case 271 /* JSDocUnionType */:
+                    return getTypeFromUnionTypeNode(node);
+                case 167 /* IntersectionType */:
+                    return getTypeFromIntersectionTypeNode(node);
+                case 273 /* JSDocNullableType */:
+                    return getTypeFromJSDocNullableTypeNode(node);
+                case 168 /* ParenthesizedType */:
+                case 274 /* JSDocNonNullableType */:
+                case 281 /* JSDocConstructorType */:
+                case 282 /* JSDocThisType */:
+                case 278 /* JSDocOptionalType */:
+                    return getTypeFromTypeNode(node.type);
+                case 275 /* JSDocRecordType */:
+                    return getTypeFromTypeNode(node.literal);
+                case 160 /* FunctionType */:
+                case 161 /* ConstructorType */:
+                case 163 /* TypeLiteral */:
+                case 293 /* JSDocTypeLiteral */:
+                case 279 /* JSDocFunctionType */:
+                    return getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node);
+                case 170 /* TypeOperator */:
+                    return getTypeFromTypeOperatorNode(node);
+                case 171 /* IndexedAccessType */:
+                    return getTypeFromIndexedAccessTypeNode(node);
+                case 172 /* MappedType */:
+                    return getTypeFromMappedTypeNode(node);
+                // This function assumes that an identifier or qualified name is a type expression
+                // Callers should first ensure this by calling isTypeNode
+                case 71 /* Identifier */:
+                case 143 /* QualifiedName */:
+                    var symbol = getSymbolAtLocation(node);
+                    return symbol && getDeclaredTypeOfSymbol(symbol);
+                case 272 /* JSDocTupleType */:
+                    return getTypeFromJSDocTupleType(node);
+                case 280 /* JSDocVariadicType */:
+                    return getTypeFromJSDocVariadicType(node);
+                default:
+                    return unknownType;
+            }
+        }
+        function instantiateList(items, mapper, instantiator) {
+            if (items && items.length) {
+                var result = [];
+                for (var _i = 0, items_1 = items; _i < items_1.length; _i++) {
+                    var v = items_1[_i];
+                    result.push(instantiator(v, mapper));
                 }
+                return result;
             }
-            return undefined;
+            return items;
         }
-        // An external module with an 'export =' declaration resolves to the target of the 'export =' declaration,
-        // and an external module with no 'export =' declaration resolves to the module itself.
-        function resolveExternalModuleSymbol(moduleSymbol) {
-            return moduleSymbol && getMergedSymbol(resolveSymbol(moduleSymbol.exports["export="])) || moduleSymbol;
+        function instantiateTypes(types, mapper) {
+            return instantiateList(types, mapper, instantiateType);
         }
-        // An external module with an 'export =' declaration may be referenced as an ES6 module provided the 'export ='
-        // references a symbol that is at least declared as a module or a variable. The target of the 'export =' may
-        // combine other declarations with the module or variable (e.g. a class/module, function/module, interface/variable).
-        function resolveESModuleSymbol(moduleSymbol, moduleReferenceExpression) {
-            var symbol = resolveExternalModuleSymbol(moduleSymbol);
-            if (symbol && !(symbol.flags & (1536 /* Module */ | 3 /* Variable */))) {
-                error(moduleReferenceExpression, ts.Diagnostics.Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct, symbolToString(moduleSymbol));
-                symbol = undefined;
-            }
-            return symbol;
+        function instantiateSignatures(signatures, mapper) {
+            return instantiateList(signatures, mapper, instantiateSignature);
         }
-        function hasExportAssignmentSymbol(moduleSymbol) {
-            return moduleSymbol.exports["export="] !== undefined;
+        function instantiateCached(type, mapper, instantiator) {
+            var instantiations = mapper.instantiations || (mapper.instantiations = []);
+            return instantiations[type.id] || (instantiations[type.id] = instantiator(type, mapper));
         }
-        function getExportsOfModuleAsArray(moduleSymbol) {
-            return symbolsToArray(getExportsOfModule(moduleSymbol));
+        function makeUnaryTypeMapper(source, target) {
+            return function (t) { return t === source ? target : t; };
         }
-        function getExportsOfSymbol(symbol) {
-            return symbol.flags & 1536 /* Module */ ? getExportsOfModule(symbol) : symbol.exports || emptySymbols;
+        function makeBinaryTypeMapper(source1, target1, source2, target2) {
+            return function (t) { return t === source1 ? target1 : t === source2 ? target2 : t; };
         }
-        function getExportsOfModule(moduleSymbol) {
-            var links = getSymbolLinks(moduleSymbol);
-            return links.resolvedExports || (links.resolvedExports = getExportsForModule(moduleSymbol));
+        function makeArrayTypeMapper(sources, targets) {
+            return function (t) {
+                for (var i = 0; i < sources.length; i++) {
+                    if (t === sources[i]) {
+                        return targets ? targets[i] : anyType;
+                    }
+                }
+                return t;
+            };
+        }
+        function createTypeMapper(sources, targets) {
+            var mapper = sources.length === 1 ? makeUnaryTypeMapper(sources[0], targets ? targets[0] : anyType) :
+                sources.length === 2 ? makeBinaryTypeMapper(sources[0], targets ? targets[0] : anyType, sources[1], targets ? targets[1] : anyType) :
+                    makeArrayTypeMapper(sources, targets);
+            mapper.mappedTypes = sources;
+            return mapper;
+        }
+        function createTypeEraser(sources) {
+            return createTypeMapper(sources, /*targets*/ undefined);
         }
         /**
-         * Extends one symbol table with another while collecting information on name collisions for error message generation into the `lookupTable` argument
-         * Not passing `lookupTable` and `exportNode` disables this collection, and just extends the tables
+         * Maps forward-references to later types parameters to the empty object type.
+         * This is used during inference when instantiating type parameter defaults.
          */
-        function extendExportSymbols(target, source, lookupTable, exportNode) {
-            for (var id in source) {
-                if (id !== "default" && !target[id]) {
-                    target[id] = source[id];
-                    if (lookupTable && exportNode) {
-                        lookupTable[id] = {
-                            specifierText: ts.getTextOfNode(exportNode.moduleSpecifier)
-                        };
-                    }
-                }
-                else if (lookupTable && exportNode && id !== "default" && target[id] && resolveSymbol(target[id]) !== resolveSymbol(source[id])) {
-                    if (!lookupTable[id].exportsWithDuplicate) {
-                        lookupTable[id].exportsWithDuplicate = [exportNode];
-                    }
-                    else {
-                        lookupTable[id].exportsWithDuplicate.push(exportNode);
-                    }
-                }
-            }
+        function createBackreferenceMapper(typeParameters, index) {
+            var mapper = function (t) { return ts.indexOf(typeParameters, t) >= index ? emptyObjectType : t; };
+            mapper.mappedTypes = typeParameters;
+            return mapper;
         }
-        function getExportsForModule(moduleSymbol) {
-            var visitedSymbols = [];
-            return visit(moduleSymbol) || moduleSymbol.exports;
-            // The ES6 spec permits export * declarations in a module to circularly reference the module itself. For example,
-            // module 'a' can 'export * from "b"' and 'b' can 'export * from "a"' without error.
-            function visit(symbol) {
-                if (!(symbol && symbol.flags & 1952 /* HasExports */ && !ts.contains(visitedSymbols, symbol))) {
-                    return;
-                }
-                visitedSymbols.push(symbol);
-                var symbols = ts.cloneMap(symbol.exports);
-                // All export * declarations are collected in an __export symbol by the binder
-                var exportStars = symbol.exports["__export"];
-                if (exportStars) {
-                    var nestedSymbols = ts.createMap();
-                    var lookupTable = ts.createMap();
-                    for (var _i = 0, _a = exportStars.declarations; _i < _a.length; _i++) {
-                        var node = _a[_i];
-                        var resolvedModule = resolveExternalModuleName(node, node.moduleSpecifier);
-                        var exportedSymbols = visit(resolvedModule);
-                        extendExportSymbols(nestedSymbols, exportedSymbols, lookupTable, node);
-                    }
-                    for (var id in lookupTable) {
-                        var exportsWithDuplicate = lookupTable[id].exportsWithDuplicate;
-                        // It's not an error if the file with multiple `export *`s with duplicate names exports a member with that name itself
-                        if (id === "export=" || !(exportsWithDuplicate && exportsWithDuplicate.length) || symbols[id]) {
-                            continue;
-                        }
-                        for (var _b = 0, exportsWithDuplicate_1 = exportsWithDuplicate; _b < exportsWithDuplicate_1.length; _b++) {
-                            var node = exportsWithDuplicate_1[_b];
-                            diagnostics.add(ts.createDiagnosticForNode(node, ts.Diagnostics.Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambiguity, lookupTable[id].specifierText, id));
-                        }
-                    }
-                    extendExportSymbols(symbols, nestedSymbols);
-                }
-                return symbols;
-            }
+        function isInferenceContext(mapper) {
+            return !!mapper.signature;
         }
-        function getMergedSymbol(symbol) {
-            var merged;
-            return symbol && symbol.mergeId && (merged = mergedSymbols[symbol.mergeId]) ? merged : symbol;
+        function cloneTypeMapper(mapper) {
+            return mapper && isInferenceContext(mapper) ?
+                createInferenceContext(mapper.signature, mapper.flags | 2 /* NoDefault */, mapper.inferences) :
+                mapper;
         }
-        function getSymbolOfNode(node) {
-            return getMergedSymbol(node.symbol);
+        function identityMapper(type) {
+            return type;
         }
-        function getParentOfSymbol(symbol) {
-            return getMergedSymbol(symbol.parent);
+        function combineTypeMappers(mapper1, mapper2) {
+            var mapper = function (t) { return instantiateType(mapper1(t), mapper2); };
+            mapper.mappedTypes = ts.concatenate(mapper1.mappedTypes, mapper2.mappedTypes);
+            return mapper;
         }
-        function getExportSymbolOfValueSymbolIfExported(symbol) {
-            return symbol && (symbol.flags & 1048576 /* ExportValue */) !== 0
-                ? getMergedSymbol(symbol.exportSymbol)
-                : symbol;
+        function createReplacementMapper(source, target, baseMapper) {
+            var mapper = function (t) { return t === source ? target : baseMapper(t); };
+            mapper.mappedTypes = baseMapper.mappedTypes;
+            return mapper;
         }
-        function symbolIsValue(symbol) {
-            // If it is an instantiated symbol, then it is a value if the symbol it is an
-            // instantiation of is a value.
-            if (symbol.flags & 16777216 /* Instantiated */) {
-                return symbolIsValue(getSymbolLinks(symbol).target);
-            }
-            // If the symbol has the value flag, it is trivially a value.
-            if (symbol.flags & 107455 /* Value */) {
-                return true;
+        function cloneTypeParameter(typeParameter) {
+            var result = createType(16384 /* TypeParameter */);
+            result.symbol = typeParameter.symbol;
+            result.target = typeParameter;
+            return result;
+        }
+        function cloneTypePredicate(predicate, mapper) {
+            if (ts.isIdentifierTypePredicate(predicate)) {
+                return {
+                    kind: 1 /* Identifier */,
+                    parameterName: predicate.parameterName,
+                    parameterIndex: predicate.parameterIndex,
+                    type: instantiateType(predicate.type, mapper)
+                };
             }
-            // If it is an alias, then it is a value if the symbol it resolves to is a value.
-            if (symbol.flags & 8388608 /* Alias */) {
-                return (resolveAlias(symbol).flags & 107455 /* Value */) !== 0;
+            else {
+                return {
+                    kind: 0 /* This */,
+                    type: instantiateType(predicate.type, mapper)
+                };
             }
-            return false;
         }
-        function findConstructorDeclaration(node) {
-            var members = node.members;
-            for (var _i = 0, members_1 = members; _i < members_1.length; _i++) {
-                var member = members_1[_i];
-                if (member.kind === 148 /* Constructor */ && ts.nodeIsPresent(member.body)) {
-                    return member;
+        function instantiateSignature(signature, mapper, eraseTypeParameters) {
+            var freshTypeParameters;
+            var freshTypePredicate;
+            if (signature.typeParameters && !eraseTypeParameters) {
+                // First create a fresh set of type parameters, then include a mapping from the old to the
+                // new type parameters in the mapper function. Finally store this mapper in the new type
+                // parameters such that we can use it when instantiating constraints.
+                freshTypeParameters = ts.map(signature.typeParameters, cloneTypeParameter);
+                mapper = combineTypeMappers(createTypeMapper(signature.typeParameters, freshTypeParameters), mapper);
+                for (var _i = 0, freshTypeParameters_1 = freshTypeParameters; _i < freshTypeParameters_1.length; _i++) {
+                    var tp = freshTypeParameters_1[_i];
+                    tp.mapper = mapper;
                 }
             }
-        }
-        function createType(flags) {
-            var result = new Type(checker, flags);
-            typeCount++;
-            result.id = typeCount;
+            if (signature.typePredicate) {
+                freshTypePredicate = cloneTypePredicate(signature.typePredicate, mapper);
+            }
+            var result = createSignature(signature.declaration, freshTypeParameters, signature.thisParameter && instantiateSymbol(signature.thisParameter, mapper), instantiateList(signature.parameters, mapper, instantiateSymbol), 
+            /*resolvedReturnType*/ undefined, freshTypePredicate, signature.minArgumentCount, signature.hasRestParameter, signature.hasLiteralTypes);
+            result.target = signature;
+            result.mapper = mapper;
             return result;
         }
-        function createIntrinsicType(kind, intrinsicName) {
-            var type = createType(kind);
-            type.intrinsicName = intrinsicName;
-            return type;
-        }
-        function createBooleanType(trueFalseTypes) {
-            var type = getUnionType(trueFalseTypes);
-            type.flags |= 8 /* Boolean */;
-            type.intrinsicName = "boolean";
-            return type;
-        }
-        function createObjectType(kind, symbol) {
-            var type = createType(kind);
-            type.symbol = symbol;
-            return type;
+        function instantiateSymbol(symbol, mapper) {
+            if (ts.getCheckFlags(symbol) & 1 /* Instantiated */) {
+                var links = getSymbolLinks(symbol);
+                // If symbol being instantiated is itself a instantiation, fetch the original target and combine the
+                // type mappers. This ensures that original type identities are properly preserved and that aliases
+                // always reference a non-aliases.
+                symbol = links.target;
+                mapper = combineTypeMappers(links.mapper, mapper);
+            }
+            // Keep the flags from the symbol we're instantiating.  Mark that is instantiated, and
+            // also transient so that we can just store data on it directly.
+            var result = createSymbol(symbol.flags, symbol.name);
+            result.checkFlags = 1 /* Instantiated */;
+            result.declarations = symbol.declarations;
+            result.parent = symbol.parent;
+            result.target = symbol;
+            result.mapper = mapper;
+            if (symbol.valueDeclaration) {
+                result.valueDeclaration = symbol.valueDeclaration;
+            }
+            return result;
         }
-        // A reserved member name starts with two underscores, but the third character cannot be an underscore
-        // or the @ symbol. A third underscore indicates an escaped form of an identifer that started
-        // with at least two underscores. The @ character indicates that the name is denoted by a well known ES
-        // Symbol instance.
-        function isReservedMemberName(name) {
-            return name.charCodeAt(0) === 95 /* _ */ &&
-                name.charCodeAt(1) === 95 /* _ */ &&
-                name.charCodeAt(2) !== 95 /* _ */ &&
-                name.charCodeAt(2) !== 64 /* at */;
+        function instantiateAnonymousType(type, mapper) {
+            var result = createObjectType(16 /* Anonymous */ | 64 /* Instantiated */, type.symbol);
+            result.target = type.objectFlags & 64 /* Instantiated */ ? type.target : type;
+            result.mapper = type.objectFlags & 64 /* Instantiated */ ? combineTypeMappers(type.mapper, mapper) : mapper;
+            result.aliasSymbol = type.aliasSymbol;
+            result.aliasTypeArguments = instantiateTypes(type.aliasTypeArguments, mapper);
+            return result;
         }
-        function getNamedMembers(members) {
-            var result;
-            for (var id in members) {
-                if (!isReservedMemberName(id)) {
-                    if (!result)
-                        result = [];
-                    var symbol = members[id];
-                    if (symbolIsValue(symbol)) {
-                        result.push(symbol);
+        function instantiateMappedType(type, mapper) {
+            // Check if we have a homomorphic mapped type, i.e. a type of the form { [P in keyof T]: X } for some
+            // type variable T. If so, the mapped type is distributive over a union type and when T is instantiated
+            // to a union type A | B, we produce { [P in keyof A]: X } | { [P in keyof B]: X }. Furthermore, for
+            // homomorphic mapped types we leave primitive types alone. For example, when T is instantiated to a
+            // union type A | undefined, we produce { [P in keyof A]: X } | undefined.
+            var constraintType = getConstraintTypeFromMappedType(type);
+            if (constraintType.flags & 262144 /* Index */) {
+                var typeVariable_1 = constraintType.type;
+                if (typeVariable_1.flags & 16384 /* TypeParameter */) {
+                    var mappedTypeVariable = instantiateType(typeVariable_1, mapper);
+                    if (typeVariable_1 !== mappedTypeVariable) {
+                        return mapType(mappedTypeVariable, function (t) {
+                            if (isMappableType(t)) {
+                                return instantiateMappedObjectType(type, createReplacementMapper(typeVariable_1, t, mapper));
+                            }
+                            return t;
+                        });
                     }
                 }
             }
-            return result || emptyArray;
+            return instantiateMappedObjectType(type, mapper);
         }
-        function setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo) {
-            type.members = members;
-            type.properties = getNamedMembers(members);
-            type.callSignatures = callSignatures;
-            type.constructSignatures = constructSignatures;
-            if (stringIndexInfo)
-                type.stringIndexInfo = stringIndexInfo;
-            if (numberIndexInfo)
-                type.numberIndexInfo = numberIndexInfo;
-            return type;
+        function isMappableType(type) {
+            return type.flags & (16384 /* TypeParameter */ | 32768 /* Object */ | 131072 /* Intersection */ | 524288 /* IndexedAccess */);
         }
-        function createAnonymousType(symbol, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo) {
-            return setObjectTypeMembers(createObjectType(2097152 /* Anonymous */, symbol), members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+        function instantiateMappedObjectType(type, mapper) {
+            var result = createObjectType(32 /* Mapped */ | 64 /* Instantiated */, type.symbol);
+            result.declaration = type.declaration;
+            result.mapper = type.mapper ? combineTypeMappers(type.mapper, mapper) : mapper;
+            result.aliasSymbol = type.aliasSymbol;
+            result.aliasTypeArguments = instantiateTypes(type.aliasTypeArguments, mapper);
+            return result;
         }
-        function forEachSymbolTableInScope(enclosingDeclaration, callback) {
-            var result;
-            for (var location_1 = enclosingDeclaration; location_1; location_1 = location_1.parent) {
-                // Locals of a source file are not in scope (because they get merged into the global symbol table)
-                if (location_1.locals && !isGlobalSourceFile(location_1)) {
-                    if (result = callback(location_1.locals)) {
-                        return result;
-                    }
+        function isSymbolInScopeOfMappedTypeParameter(symbol, mapper) {
+            if (!(symbol.declarations && symbol.declarations.length)) {
+                return false;
+            }
+            var mappedTypes = mapper.mappedTypes;
+            // Starting with the parent of the symbol's declaration, check if the mapper maps any of
+            // the type parameters introduced by enclosing declarations. We just pick the first
+            // declaration since multiple declarations will all have the same parent anyway.
+            return !!ts.findAncestor(symbol.declarations[0], function (node) {
+                if (node.kind === 233 /* ModuleDeclaration */ || node.kind === 265 /* SourceFile */) {
+                    return "quit";
                 }
-                switch (location_1.kind) {
-                    case 256 /* SourceFile */:
-                        if (!ts.isExternalOrCommonJsModule(location_1)) {
-                            break;
+                switch (node.kind) {
+                    case 160 /* FunctionType */:
+                    case 161 /* ConstructorType */:
+                    case 228 /* FunctionDeclaration */:
+                    case 151 /* MethodDeclaration */:
+                    case 150 /* MethodSignature */:
+                    case 152 /* Constructor */:
+                    case 155 /* CallSignature */:
+                    case 156 /* ConstructSignature */:
+                    case 157 /* IndexSignature */:
+                    case 153 /* GetAccessor */:
+                    case 154 /* SetAccessor */:
+                    case 186 /* FunctionExpression */:
+                    case 187 /* ArrowFunction */:
+                    case 229 /* ClassDeclaration */:
+                    case 199 /* ClassExpression */:
+                    case 230 /* InterfaceDeclaration */:
+                    case 231 /* TypeAliasDeclaration */:
+                        var typeParameters = ts.getEffectiveTypeParameterDeclarations(node);
+                        if (typeParameters) {
+                            for (var _i = 0, typeParameters_1 = typeParameters; _i < typeParameters_1.length; _i++) {
+                                var d = typeParameters_1[_i];
+                                if (ts.contains(mappedTypes, getDeclaredTypeOfTypeParameter(getSymbolOfNode(d)))) {
+                                    return true;
+                                }
+                            }
                         }
-                    case 225 /* ModuleDeclaration */:
-                        if (result = callback(getSymbolOfNode(location_1).exports)) {
-                            return result;
+                        if (ts.isClassLike(node) || node.kind === 230 /* InterfaceDeclaration */) {
+                            var thisType = getDeclaredTypeOfClassOrInterface(getSymbolOfNode(node)).thisType;
+                            if (thisType && ts.contains(mappedTypes, thisType)) {
+                                return true;
+                            }
+                        }
+                        break;
+                    case 172 /* MappedType */:
+                        if (ts.contains(mappedTypes, getDeclaredTypeOfTypeParameter(getSymbolOfNode(node.typeParameter)))) {
+                            return true;
+                        }
+                        break;
+                    case 279 /* JSDocFunctionType */:
+                        var func = node;
+                        for (var _a = 0, _b = func.parameters; _a < _b.length; _a++) {
+                            var p = _b[_a];
+                            if (ts.contains(mappedTypes, getTypeOfNode(p))) {
+                                return true;
+                            }
                         }
                         break;
                 }
-            }
-            return callback(globals);
+            });
         }
-        function getQualifiedLeftMeaning(rightMeaning) {
-            // If we are looking in value space, the parent meaning is value, other wise it is namespace
-            return rightMeaning === 107455 /* Value */ ? 107455 /* Value */ : 1920 /* Namespace */;
+        function isTopLevelTypeAlias(symbol) {
+            if (symbol.declarations && symbol.declarations.length) {
+                var parentKind = symbol.declarations[0].parent.kind;
+                return parentKind === 265 /* SourceFile */ || parentKind === 234 /* ModuleBlock */;
+            }
+            return false;
         }
-        function getAccessibleSymbolChain(symbol, enclosingDeclaration, meaning, useOnlyExternalAliasing) {
-            function getAccessibleSymbolChainFromSymbolTable(symbols) {
-                function canQualifySymbol(symbolFromSymbolTable, meaning) {
-                    // If the symbol is equivalent and doesn't need further qualification, this symbol is accessible
-                    if (!needsQualification(symbolFromSymbolTable, enclosingDeclaration, meaning)) {
-                        return true;
-                    }
-                    // If symbol needs qualification, make sure that parent is accessible, if it is then this symbol is accessible too
-                    var accessibleParent = getAccessibleSymbolChain(symbolFromSymbolTable.parent, enclosingDeclaration, getQualifiedLeftMeaning(meaning), useOnlyExternalAliasing);
-                    return !!accessibleParent;
-                }
-                function isAccessible(symbolFromSymbolTable, resolvedAliasSymbol) {
-                    if (symbol === (resolvedAliasSymbol || symbolFromSymbolTable)) {
-                        // if the symbolFromSymbolTable is not external module (it could be if it was determined as ambient external module and would be in globals table)
-                        // and if symbolFromSymbolTable or alias resolution matches the symbol,
-                        // check the symbol can be qualified, it is only then this symbol is accessible
-                        return !ts.forEach(symbolFromSymbolTable.declarations, hasExternalModuleSymbol) &&
-                            canQualifySymbol(symbolFromSymbolTable, meaning);
-                    }
-                }
-                // If symbol is directly available by its name in the symbol table
-                if (isAccessible(symbols[symbol.name])) {
-                    return [symbol];
-                }
-                // Check if symbol is any of the alias
-                return ts.forEachProperty(symbols, function (symbolFromSymbolTable) {
-                    if (symbolFromSymbolTable.flags & 8388608 /* Alias */
-                        && symbolFromSymbolTable.name !== "export="
-                        && !ts.getDeclarationOfKind(symbolFromSymbolTable, 238 /* ExportSpecifier */)) {
-                        if (!useOnlyExternalAliasing ||
-                            // Is this external alias, then use it to name
-                            ts.forEach(symbolFromSymbolTable.declarations, ts.isExternalModuleImportEqualsDeclaration)) {
-                            var resolvedImportedSymbol = resolveAlias(symbolFromSymbolTable);
-                            if (isAccessible(symbolFromSymbolTable, resolveAlias(symbolFromSymbolTable))) {
-                                return [symbolFromSymbolTable];
-                            }
-                            // Look in the exported members, if we can find accessibleSymbolChain, symbol is accessible using this chain
-                            // but only if the symbolFromSymbolTable can be qualified
-                            var accessibleSymbolsFromExports = resolvedImportedSymbol.exports ? getAccessibleSymbolChainFromSymbolTable(resolvedImportedSymbol.exports) : undefined;
-                            if (accessibleSymbolsFromExports && canQualifySymbol(symbolFromSymbolTable, getQualifiedLeftMeaning(meaning))) {
-                                return [symbolFromSymbolTable].concat(accessibleSymbolsFromExports);
-                            }
-                        }
+        function instantiateType(type, mapper) {
+            if (type && mapper !== identityMapper) {
+                // If we are instantiating a type that has a top-level type alias, obtain the instantiation through
+                // the type alias instead in order to share instantiations for the same type arguments. This can
+                // dramatically reduce the number of structurally identical types we generate. Note that we can only
+                // perform this optimization for top-level type aliases. Consider:
+                //
+                //   function f1<T>(x: T) {
+                //     type Foo<X> = { x: X, t: T };
+                //     let obj: Foo<T> = { x: x };
+                //     return obj;
+                //   }
+                //   function f2<U>(x: U) { return f1(x); }
+                //   let z = f2(42);
+                //
+                // Above, the declaration of f2 has an inferred return type that is an instantiation of f1's Foo<X>
+                // equivalent to { x: U, t: U }. When instantiating this return type, we can't go back to Foo<X>'s
+                // cache because all cached instantiations are of the form { x: ???, t: T }, i.e. they have not been
+                // instantiated for T. Instead, we need to further instantiate the { x: U, t: U } form.
+                if (type.aliasSymbol && isTopLevelTypeAlias(type.aliasSymbol)) {
+                    if (type.aliasTypeArguments) {
+                        return getTypeAliasInstantiation(type.aliasSymbol, instantiateTypes(type.aliasTypeArguments, mapper));
                     }
-                });
-            }
-            if (symbol) {
-                if (!(isPropertyOrMethodDeclarationSymbol(symbol))) {
-                    return forEachSymbolTableInScope(enclosingDeclaration, getAccessibleSymbolChainFromSymbolTable);
+                    return type;
                 }
+                return instantiateTypeNoAlias(type, mapper);
             }
+            return type;
         }
-        function needsQualification(symbol, enclosingDeclaration, meaning) {
-            var qualify = false;
-            forEachSymbolTableInScope(enclosingDeclaration, function (symbolTable) {
-                // If symbol of this name is not available in the symbol table we are ok
-                var symbolFromSymbolTable = symbolTable[symbol.name];
-                if (!symbolFromSymbolTable) {
-                    // Continue to the next symbol table
-                    return false;
+        function instantiateTypeNoAlias(type, mapper) {
+            if (type.flags & 16384 /* TypeParameter */) {
+                return mapper(type);
+            }
+            if (type.flags & 32768 /* Object */) {
+                if (type.objectFlags & 16 /* Anonymous */) {
+                    // If the anonymous type originates in a declaration of a function, method, class, or
+                    // interface, in an object type literal, or in an object literal expression, we may need
+                    // to instantiate the type because it might reference a type parameter. We skip instantiation
+                    // if none of the type parameters that are in scope in the type's declaration are mapped by
+                    // the given mapper, however we can only do that analysis if the type isn't itself an
+                    // instantiation.
+                    return type.symbol &&
+                        type.symbol.flags & (16 /* Function */ | 8192 /* Method */ | 32 /* Class */ | 2048 /* TypeLiteral */ | 4096 /* ObjectLiteral */) &&
+                        (type.objectFlags & 64 /* Instantiated */ || isSymbolInScopeOfMappedTypeParameter(type.symbol, mapper)) ?
+                        instantiateCached(type, mapper, instantiateAnonymousType) : type;
                 }
-                // If the symbol with this name is present it should refer to the symbol
-                if (symbolFromSymbolTable === symbol) {
-                    // No need to qualify
-                    return true;
+                if (type.objectFlags & 32 /* Mapped */) {
+                    return instantiateCached(type, mapper, instantiateMappedType);
                 }
-                // Qualify if the symbol from symbol table has same meaning as expected
-                symbolFromSymbolTable = (symbolFromSymbolTable.flags & 8388608 /* Alias */ && !ts.getDeclarationOfKind(symbolFromSymbolTable, 238 /* ExportSpecifier */)) ? resolveAlias(symbolFromSymbolTable) : symbolFromSymbolTable;
-                if (symbolFromSymbolTable.flags & meaning) {
-                    qualify = true;
-                    return true;
+                if (type.objectFlags & 4 /* Reference */) {
+                    return createTypeReference(type.target, instantiateTypes(type.typeArguments, mapper));
                 }
-                // Continue to the next symbol table
+            }
+            if (type.flags & 65536 /* Union */ && !(type.flags & 8190 /* Primitive */)) {
+                return getUnionType(instantiateTypes(type.types, mapper), /*subtypeReduction*/ false, type.aliasSymbol, instantiateTypes(type.aliasTypeArguments, mapper));
+            }
+            if (type.flags & 131072 /* Intersection */) {
+                return getIntersectionType(instantiateTypes(type.types, mapper), type.aliasSymbol, instantiateTypes(type.aliasTypeArguments, mapper));
+            }
+            if (type.flags & 262144 /* Index */) {
+                return getIndexType(instantiateType(type.type, mapper));
+            }
+            if (type.flags & 524288 /* IndexedAccess */) {
+                return getIndexedAccessType(instantiateType(type.objectType, mapper), instantiateType(type.indexType, mapper));
+            }
+            return type;
+        }
+        function instantiateIndexInfo(info, mapper) {
+            return info && createIndexInfo(instantiateType(info.type, mapper), info.isReadonly, info.declaration);
+        }
+        // Returns true if the given expression contains (at any level of nesting) a function or arrow expression
+        // that is subject to contextual typing.
+        function isContextSensitive(node) {
+            ts.Debug.assert(node.kind !== 151 /* MethodDeclaration */ || ts.isObjectLiteralMethod(node));
+            switch (node.kind) {
+                case 186 /* FunctionExpression */:
+                case 187 /* ArrowFunction */:
+                    return isContextSensitiveFunctionLikeDeclaration(node);
+                case 178 /* ObjectLiteralExpression */:
+                    return ts.forEach(node.properties, isContextSensitive);
+                case 177 /* ArrayLiteralExpression */:
+                    return ts.forEach(node.elements, isContextSensitive);
+                case 195 /* ConditionalExpression */:
+                    return isContextSensitive(node.whenTrue) ||
+                        isContextSensitive(node.whenFalse);
+                case 194 /* BinaryExpression */:
+                    return node.operatorToken.kind === 54 /* BarBarToken */ &&
+                        (isContextSensitive(node.left) || isContextSensitive(node.right));
+                case 261 /* PropertyAssignment */:
+                    return isContextSensitive(node.initializer);
+                case 151 /* MethodDeclaration */:
+                case 150 /* MethodSignature */:
+                    return isContextSensitiveFunctionLikeDeclaration(node);
+                case 185 /* ParenthesizedExpression */:
+                    return isContextSensitive(node.expression);
+                case 254 /* JsxAttributes */:
+                    return ts.forEach(node.properties, isContextSensitive);
+                case 253 /* JsxAttribute */:
+                    // If there is no initializer, JSX attribute has a boolean value of true which is not context sensitive.
+                    return node.initializer && isContextSensitive(node.initializer);
+                case 256 /* JsxExpression */:
+                    // It is possible to that node.expression is undefined (e.g <div x={} />)
+                    return node.expression && isContextSensitive(node.expression);
+            }
+            return false;
+        }
+        function isContextSensitiveFunctionLikeDeclaration(node) {
+            // Functions with type parameters are not context sensitive.
+            if (node.typeParameters) {
                 return false;
-            });
-            return qualify;
+            }
+            // Functions with any parameters that lack type annotations are context sensitive.
+            if (ts.forEach(node.parameters, function (p) { return !ts.getEffectiveTypeAnnotationNode(p); })) {
+                return true;
+            }
+            // For arrow functions we now know we're not context sensitive.
+            if (node.kind === 187 /* ArrowFunction */) {
+                return false;
+            }
+            // If the first parameter is not an explicit 'this' parameter, then the function has
+            // an implicit 'this' parameter which is subject to contextual typing. Otherwise we
+            // know that all parameters (including 'this') have type annotations and nothing is
+            // subject to contextual typing.
+            var parameter = ts.firstOrUndefined(node.parameters);
+            return !(parameter && ts.parameterIsThisKeyword(parameter));
         }
-        function isPropertyOrMethodDeclarationSymbol(symbol) {
-            if (symbol.declarations && symbol.declarations.length) {
-                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                    var declaration = _a[_i];
-                    switch (declaration.kind) {
-                        case 145 /* PropertyDeclaration */:
-                        case 147 /* MethodDeclaration */:
-                        case 149 /* GetAccessor */:
-                        case 150 /* SetAccessor */:
-                            continue;
-                        default:
-                            return false;
-                    }
+        function isContextSensitiveFunctionOrObjectLiteralMethod(func) {
+            return (isFunctionExpressionOrArrowFunction(func) || ts.isObjectLiteralMethod(func)) && isContextSensitiveFunctionLikeDeclaration(func);
+        }
+        function getTypeWithoutSignatures(type) {
+            if (type.flags & 32768 /* Object */) {
+                var resolved = resolveStructuredTypeMembers(type);
+                if (resolved.constructSignatures.length) {
+                    var result = createObjectType(16 /* Anonymous */, type.symbol);
+                    result.members = resolved.members;
+                    result.properties = resolved.properties;
+                    result.callSignatures = emptyArray;
+                    result.constructSignatures = emptyArray;
+                    return result;
                 }
-                return true;
             }
-            return false;
+            else if (type.flags & 131072 /* Intersection */) {
+                return getIntersectionType(ts.map(type.types, getTypeWithoutSignatures));
+            }
+            return type;
+        }
+        // TYPE CHECKING
+        function isTypeIdenticalTo(source, target) {
+            return isTypeRelatedTo(source, target, identityRelation);
+        }
+        function compareTypesIdentical(source, target) {
+            return isTypeRelatedTo(source, target, identityRelation) ? -1 /* True */ : 0 /* False */;
+        }
+        function compareTypesAssignable(source, target) {
+            return isTypeRelatedTo(source, target, assignableRelation) ? -1 /* True */ : 0 /* False */;
+        }
+        function isTypeSubtypeOf(source, target) {
+            return isTypeRelatedTo(source, target, subtypeRelation);
+        }
+        function isTypeAssignableTo(source, target) {
+            return isTypeRelatedTo(source, target, assignableRelation);
+        }
+        // A type S is considered to be an instance of a type T if S and T are the same type or if S is a
+        // subtype of T but not structurally identical to T. This specifically means that two distinct but
+        // structurally identical types (such as two classes) are not considered instances of each other.
+        function isTypeInstanceOf(source, target) {
+            return getTargetType(source) === getTargetType(target) || isTypeSubtypeOf(source, target) && !isTypeIdenticalTo(source, target);
         }
         /**
-         * Check if the given symbol in given enclosing declaration is accessible and mark all associated alias to be visible if requested
+         * This is *not* a bi-directional relationship.
+         * If one needs to check both directions for comparability, use a second call to this function or 'checkTypeComparableTo'.
          *
-         * @param symbol a Symbol to check if accessible
-         * @param enclosingDeclaration a Node containing reference to the symbol
-         * @param meaning a SymbolFlags to check if such meaning of the symbol is accessible
-         * @param shouldComputeAliasToMakeVisible a boolean value to indicate whether to return aliases to be mark visible in case the symbol is accessible
+         * A type S is comparable to a type T if some (but not necessarily all) of the possible values of S are also possible values of T.
+         * It is used to check following cases:
+         *   - the types of the left and right sides of equality/inequality operators (`===`, `!==`, `==`, `!=`).
+         *   - the types of `case` clause expressions and their respective `switch` expressions.
+         *   - the type of an expression in a type assertion with the type being asserted.
          */
-        function isSymbolAccessible(symbol, enclosingDeclaration, meaning, shouldComputeAliasesToMakeVisible) {
-            if (symbol && enclosingDeclaration && !(symbol.flags & 262144 /* TypeParameter */)) {
-                var initialSymbol = symbol;
-                var meaningToLook = meaning;
-                while (symbol) {
-                    // Symbol is accessible if it by itself is accessible
-                    var accessibleSymbolChain = getAccessibleSymbolChain(symbol, enclosingDeclaration, meaningToLook, /*useOnlyExternalAliasing*/ false);
-                    if (accessibleSymbolChain) {
-                        var hasAccessibleDeclarations = hasVisibleDeclarations(accessibleSymbolChain[0], shouldComputeAliasesToMakeVisible);
-                        if (!hasAccessibleDeclarations) {
-                            return {
-                                accessibility: 1 /* NotAccessible */,
-                                errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning),
-                                errorModuleName: symbol !== initialSymbol ? symbolToString(symbol, enclosingDeclaration, 1920 /* Namespace */) : undefined,
-                            };
+        function isTypeComparableTo(source, target) {
+            return isTypeRelatedTo(source, target, comparableRelation);
+        }
+        function areTypesComparable(type1, type2) {
+            return isTypeComparableTo(type1, type2) || isTypeComparableTo(type2, type1);
+        }
+        function checkTypeAssignableTo(source, target, errorNode, headMessage, containingMessageChain) {
+            return checkTypeRelatedTo(source, target, assignableRelation, errorNode, headMessage, containingMessageChain);
+        }
+        /**
+         * This is *not* a bi-directional relationship.
+         * If one needs to check both directions for comparability, use a second call to this function or 'isTypeComparableTo'.
+         */
+        function checkTypeComparableTo(source, target, errorNode, headMessage, containingMessageChain) {
+            return checkTypeRelatedTo(source, target, comparableRelation, errorNode, headMessage, containingMessageChain);
+        }
+        function isSignatureAssignableTo(source, target, ignoreReturnTypes) {
+            return compareSignaturesRelated(source, target, /*checkAsCallback*/ false, ignoreReturnTypes, /*reportErrors*/ false, 
+            /*errorReporter*/ undefined, compareTypesAssignable) !== 0 /* False */;
+        }
+        /**
+         * See signatureRelatedTo, compareSignaturesIdentical
+         */
+        function compareSignaturesRelated(source, target, checkAsCallback, ignoreReturnTypes, reportErrors, errorReporter, compareTypes) {
+            // TODO (drosen): De-duplicate code between related functions.
+            if (source === target) {
+                return -1 /* True */;
+            }
+            if (!target.hasRestParameter && source.minArgumentCount > target.parameters.length) {
+                return 0 /* False */;
+            }
+            if (source.typeParameters) {
+                source = instantiateSignatureInContextOf(source, target);
+            }
+            var result = -1 /* True */;
+            var sourceThisType = getThisTypeOfSignature(source);
+            if (sourceThisType && sourceThisType !== voidType) {
+                var targetThisType = getThisTypeOfSignature(target);
+                if (targetThisType) {
+                    // void sources are assignable to anything.
+                    var related = compareTypes(sourceThisType, targetThisType, /*reportErrors*/ false)
+                        || compareTypes(targetThisType, sourceThisType, reportErrors);
+                    if (!related) {
+                        if (reportErrors) {
+                            errorReporter(ts.Diagnostics.The_this_types_of_each_signature_are_incompatible);
                         }
-                        return hasAccessibleDeclarations;
+                        return 0 /* False */;
                     }
-                    // If we haven't got the accessible symbol, it doesn't mean the symbol is actually inaccessible.
-                    // It could be a qualified symbol and hence verify the path
-                    // e.g.:
-                    // module m {
-                    //     export class c {
-                    //     }
-                    // }
-                    // const x: typeof m.c
-                    // In the above example when we start with checking if typeof m.c symbol is accessible,
-                    // we are going to see if c can be accessed in scope directly.
-                    // But it can't, hence the accessible is going to be undefined, but that doesn't mean m.c is inaccessible
-                    // It is accessible if the parent m is accessible because then m.c can be accessed through qualification
-                    meaningToLook = getQualifiedLeftMeaning(meaning);
-                    symbol = getParentOfSymbol(symbol);
+                    result &= related;
                 }
-                // This could be a symbol that is not exported in the external module
-                // or it could be a symbol from different external module that is not aliased and hence cannot be named
-                var symbolExternalModule = ts.forEach(initialSymbol.declarations, getExternalModuleContainer);
-                if (symbolExternalModule) {
-                    var enclosingExternalModule = getExternalModuleContainer(enclosingDeclaration);
-                    if (symbolExternalModule !== enclosingExternalModule) {
-                        // name from different external module that is not visible
-                        return {
-                            accessibility: 2 /* CannotBeNamed */,
-                            errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning),
-                            errorModuleName: symbolToString(symbolExternalModule)
-                        };
+            }
+            var sourceMax = getNumNonRestParameters(source);
+            var targetMax = getNumNonRestParameters(target);
+            var checkCount = getNumParametersToCheckForSignatureRelatability(source, sourceMax, target, targetMax);
+            var sourceParams = source.parameters;
+            var targetParams = target.parameters;
+            for (var i = 0; i < checkCount; i++) {
+                var sourceType = i < sourceMax ? getTypeOfParameter(sourceParams[i]) : getRestTypeOfSignature(source);
+                var targetType = i < targetMax ? getTypeOfParameter(targetParams[i]) : getRestTypeOfSignature(target);
+                var sourceSig = getSingleCallSignature(getNonNullableType(sourceType));
+                var targetSig = getSingleCallSignature(getNonNullableType(targetType));
+                // In order to ensure that any generic type Foo<T> is at least co-variant with respect to T no matter
+                // how Foo uses T, we need to relate parameters bi-variantly (given that parameters are input positions,
+                // they naturally relate only contra-variantly). However, if the source and target parameters both have
+                // function types with a single call signature, we known we are relating two callback parameters. In
+                // that case it is sufficient to only relate the parameters of the signatures co-variantly because,
+                // similar to return values, callback parameters are output positions. This means that a Promise<T>,
+                // where T is used only in callback parameter positions, will be co-variant (as opposed to bi-variant)
+                // with respect to T.
+                var callbacks = sourceSig && targetSig && !sourceSig.typePredicate && !targetSig.typePredicate &&
+                    (getFalsyFlags(sourceType) & 6144 /* Nullable */) === (getFalsyFlags(targetType) & 6144 /* Nullable */);
+                var related = callbacks ?
+                    compareSignaturesRelated(targetSig, sourceSig, /*checkAsCallback*/ true, /*ignoreReturnTypes*/ false, reportErrors, errorReporter, compareTypes) :
+                    !checkAsCallback && compareTypes(sourceType, targetType, /*reportErrors*/ false) || compareTypes(targetType, sourceType, reportErrors);
+                if (!related) {
+                    if (reportErrors) {
+                        errorReporter(ts.Diagnostics.Types_of_parameters_0_and_1_are_incompatible, sourceParams[i < sourceMax ? i : sourceMax].name, targetParams[i < targetMax ? i : targetMax].name);
                     }
+                    return 0 /* False */;
                 }
-                // Just a local name that is not accessible
-                return {
-                    accessibility: 1 /* NotAccessible */,
-                    errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning),
-                };
+                result &= related;
             }
-            return { accessibility: 0 /* Accessible */ };
-            function getExternalModuleContainer(declaration) {
-                for (; declaration; declaration = declaration.parent) {
-                    if (hasExternalModuleSymbol(declaration)) {
-                        return getSymbolOfNode(declaration);
+            if (!ignoreReturnTypes) {
+                var targetReturnType = getReturnTypeOfSignature(target);
+                if (targetReturnType === voidType) {
+                    return result;
+                }
+                var sourceReturnType = getReturnTypeOfSignature(source);
+                // The following block preserves behavior forbidding boolean returning functions from being assignable to type guard returning functions
+                if (target.typePredicate) {
+                    if (source.typePredicate) {
+                        result &= compareTypePredicateRelatedTo(source.typePredicate, target.typePredicate, reportErrors, errorReporter, compareTypes);
+                    }
+                    else if (ts.isIdentifierTypePredicate(target.typePredicate)) {
+                        if (reportErrors) {
+                            errorReporter(ts.Diagnostics.Signature_0_must_have_a_type_predicate, signatureToString(source));
+                        }
+                        return 0 /* False */;
                     }
                 }
+                else {
+                    // When relating callback signatures, we still need to relate return types bi-variantly as otherwise
+                    // the containing type wouldn't be co-variant. For example, interface Foo<T> { add(cb: () => T): void }
+                    // wouldn't be co-variant for T without this rule.
+                    result &= checkAsCallback && compareTypes(targetReturnType, sourceReturnType, /*reportErrors*/ false) ||
+                        compareTypes(sourceReturnType, targetReturnType, reportErrors);
+                }
             }
+            return result;
         }
-        function hasExternalModuleSymbol(declaration) {
-            return ts.isAmbientModule(declaration) || (declaration.kind === 256 /* SourceFile */ && ts.isExternalOrCommonJsModule(declaration));
-        }
-        function hasVisibleDeclarations(symbol, shouldComputeAliasToMakeVisible) {
-            var aliasesToMakeVisible;
-            if (ts.forEach(symbol.declarations, function (declaration) { return !getIsDeclarationVisible(declaration); })) {
-                return undefined;
+        function compareTypePredicateRelatedTo(source, target, reportErrors, errorReporter, compareTypes) {
+            if (source.kind !== target.kind) {
+                if (reportErrors) {
+                    errorReporter(ts.Diagnostics.A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard);
+                    errorReporter(ts.Diagnostics.Type_predicate_0_is_not_assignable_to_1, typePredicateToString(source), typePredicateToString(target));
+                }
+                return 0 /* False */;
             }
-            return { accessibility: 0 /* Accessible */, aliasesToMakeVisible: aliasesToMakeVisible };
-            function getIsDeclarationVisible(declaration) {
-                if (!isDeclarationVisible(declaration)) {
-                    // Mark the unexported alias as visible if its parent is visible
-                    // because these kind of aliases can be used to name types in declaration file
-                    var anyImportSyntax = getAnyImportSyntax(declaration);
-                    if (anyImportSyntax &&
-                        !(ts.getModifierFlags(anyImportSyntax) & 1 /* Export */) &&
-                        isDeclarationVisible(anyImportSyntax.parent)) {
-                        // In function "buildTypeDisplay" where we decide whether to write type-alias or serialize types,
-                        // we want to just check if type- alias is accessible or not but we don't care about emitting those alias at that time
-                        // since we will do the emitting later in trackSymbol.
-                        if (shouldComputeAliasToMakeVisible) {
-                            getNodeLinks(declaration).isVisible = true;
-                            if (aliasesToMakeVisible) {
-                                if (!ts.contains(aliasesToMakeVisible, anyImportSyntax)) {
-                                    aliasesToMakeVisible.push(anyImportSyntax);
-                                }
-                            }
-                            else {
-                                aliasesToMakeVisible = [anyImportSyntax];
-                            }
-                        }
-                        return true;
+            if (source.kind === 1 /* Identifier */) {
+                var sourceIdentifierPredicate = source;
+                var targetIdentifierPredicate = target;
+                if (sourceIdentifierPredicate.parameterIndex !== targetIdentifierPredicate.parameterIndex) {
+                    if (reportErrors) {
+                        errorReporter(ts.Diagnostics.Parameter_0_is_not_in_the_same_position_as_parameter_1, sourceIdentifierPredicate.parameterName, targetIdentifierPredicate.parameterName);
+                        errorReporter(ts.Diagnostics.Type_predicate_0_is_not_assignable_to_1, typePredicateToString(source), typePredicateToString(target));
                     }
-                    // Declaration is not visible
-                    return false;
+                    return 0 /* False */;
                 }
-                return true;
             }
+            var related = compareTypes(source.type, target.type, reportErrors);
+            if (related === 0 /* False */ && reportErrors) {
+                errorReporter(ts.Diagnostics.Type_predicate_0_is_not_assignable_to_1, typePredicateToString(source), typePredicateToString(target));
+            }
+            return related;
         }
-        function isEntityNameVisible(entityName, enclosingDeclaration) {
-            // get symbol of the first identifier of the entityName
-            var meaning;
-            if (entityName.parent.kind === 158 /* TypeQuery */ || ts.isExpressionWithTypeArgumentsInClassExtendsClause(entityName.parent)) {
-                // Typeof value
-                meaning = 107455 /* Value */ | 1048576 /* ExportValue */;
+        function isImplementationCompatibleWithOverload(implementation, overload) {
+            var erasedSource = getErasedSignature(implementation);
+            var erasedTarget = getErasedSignature(overload);
+            // First see if the return types are compatible in either direction.
+            var sourceReturnType = getReturnTypeOfSignature(erasedSource);
+            var targetReturnType = getReturnTypeOfSignature(erasedTarget);
+            if (targetReturnType === voidType
+                || isTypeRelatedTo(targetReturnType, sourceReturnType, assignableRelation)
+                || isTypeRelatedTo(sourceReturnType, targetReturnType, assignableRelation)) {
+                return isSignatureAssignableTo(erasedSource, erasedTarget, /*ignoreReturnTypes*/ true);
             }
-            else if (entityName.kind === 139 /* QualifiedName */ || entityName.kind === 172 /* PropertyAccessExpression */ ||
-                entityName.parent.kind === 229 /* ImportEqualsDeclaration */) {
-                // Left identifier from type reference or TypeAlias
-                // Entity name of the import declaration
-                meaning = 1920 /* Namespace */;
+            return false;
+        }
+        function getNumNonRestParameters(signature) {
+            var numParams = signature.parameters.length;
+            return signature.hasRestParameter ?
+                numParams - 1 :
+                numParams;
+        }
+        function getNumParametersToCheckForSignatureRelatability(source, sourceNonRestParamCount, target, targetNonRestParamCount) {
+            if (source.hasRestParameter === target.hasRestParameter) {
+                if (source.hasRestParameter) {
+                    // If both have rest parameters, get the max and add 1 to
+                    // compensate for the rest parameter.
+                    return Math.max(sourceNonRestParamCount, targetNonRestParamCount) + 1;
+                }
+                else {
+                    return Math.min(sourceNonRestParamCount, targetNonRestParamCount);
+                }
             }
             else {
-                // Type Reference or TypeAlias entity = Identifier
-                meaning = 793064 /* Type */;
+                // Return the count for whichever signature doesn't have rest parameters.
+                return source.hasRestParameter ?
+                    targetNonRestParamCount :
+                    sourceNonRestParamCount;
             }
-            var firstIdentifier = getFirstIdentifier(entityName);
-            var symbol = resolveName(enclosingDeclaration, firstIdentifier.text, meaning, /*nodeNotFoundErrorMessage*/ undefined, /*nameArg*/ undefined);
-            // Verify if the symbol is accessible
-            return (symbol && hasVisibleDeclarations(symbol, /*shouldComputeAliasToMakeVisible*/ true)) || {
-                accessibility: 1 /* NotAccessible */,
-                errorSymbolName: ts.getTextOfNode(firstIdentifier),
-                errorNode: firstIdentifier
-            };
-        }
-        function writeKeyword(writer, kind) {
-            writer.writeKeyword(ts.tokenToString(kind));
-        }
-        function writePunctuation(writer, kind) {
-            writer.writePunctuation(ts.tokenToString(kind));
-        }
-        function writeSpace(writer) {
-            writer.writeSpace(" ");
         }
-        function symbolToString(symbol, enclosingDeclaration, meaning) {
-            var writer = ts.getSingleLineStringWriter();
-            getSymbolDisplayBuilder().buildSymbolDisplay(symbol, writer, enclosingDeclaration, meaning);
-            var result = writer.string();
-            ts.releaseStringWriter(writer);
-            return result;
+        function isEmptyResolvedType(t) {
+            return t.properties.length === 0 &&
+                t.callSignatures.length === 0 &&
+                t.constructSignatures.length === 0 &&
+                !t.stringIndexInfo &&
+                !t.numberIndexInfo;
         }
-        function signatureToString(signature, enclosingDeclaration, flags, kind) {
-            var writer = ts.getSingleLineStringWriter();
-            getSymbolDisplayBuilder().buildSignatureDisplay(signature, writer, enclosingDeclaration, flags, kind);
-            var result = writer.string();
-            ts.releaseStringWriter(writer);
-            return result;
+        function isEmptyObjectType(type) {
+            return type.flags & 32768 /* Object */ ? isEmptyResolvedType(resolveStructuredTypeMembers(type)) :
+                type.flags & 16777216 /* NonPrimitive */ ? true :
+                    type.flags & 65536 /* Union */ ? ts.forEach(type.types, isEmptyObjectType) :
+                        type.flags & 131072 /* Intersection */ ? !ts.forEach(type.types, function (t) { return !isEmptyObjectType(t); }) :
+                            false;
         }
-        function typeToString(type, enclosingDeclaration, flags) {
-            var writer = ts.getSingleLineStringWriter();
-            getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
-            var result = writer.string();
-            ts.releaseStringWriter(writer);
-            var maxLength = compilerOptions.noErrorTruncation || flags & 4 /* NoTruncation */ ? undefined : 100;
-            if (maxLength && result.length >= maxLength) {
-                result = result.substr(0, maxLength - "...".length) + "...";
+        function isEnumTypeRelatedTo(sourceSymbol, targetSymbol, errorReporter) {
+            if (sourceSymbol === targetSymbol) {
+                return true;
             }
-            return result;
-        }
-        function typePredicateToString(typePredicate, enclosingDeclaration, flags) {
-            var writer = ts.getSingleLineStringWriter();
-            getSymbolDisplayBuilder().buildTypePredicateDisplay(typePredicate, writer, enclosingDeclaration, flags);
-            var result = writer.string();
-            ts.releaseStringWriter(writer);
-            return result;
-        }
-        function formatUnionTypes(types) {
-            var result = [];
-            var flags = 0;
-            for (var i = 0; i < types.length; i++) {
-                var t = types[i];
-                flags |= t.flags;
-                if (!(t.flags & 6144 /* Nullable */)) {
-                    if (t.flags & (128 /* BooleanLiteral */ | 256 /* EnumLiteral */)) {
-                        var baseType = t.flags & 128 /* BooleanLiteral */ ? booleanType : t.baseType;
-                        var count = baseType.types.length;
-                        if (i + count <= types.length && types[i + count - 1] === baseType.types[count - 1]) {
-                            result.push(baseType);
-                            i += count - 1;
-                            continue;
+            var id = getSymbolId(sourceSymbol) + "," + getSymbolId(targetSymbol);
+            var relation = enumRelation.get(id);
+            if (relation !== undefined) {
+                return relation;
+            }
+            if (sourceSymbol.name !== targetSymbol.name || !(sourceSymbol.flags & 256 /* RegularEnum */) || !(targetSymbol.flags & 256 /* RegularEnum */)) {
+                enumRelation.set(id, false);
+                return false;
+            }
+            var targetEnumType = getTypeOfSymbol(targetSymbol);
+            for (var _i = 0, _a = getPropertiesOfType(getTypeOfSymbol(sourceSymbol)); _i < _a.length; _i++) {
+                var property = _a[_i];
+                if (property.flags & 8 /* EnumMember */) {
+                    var targetProperty = getPropertyOfType(targetEnumType, property.name);
+                    if (!targetProperty || !(targetProperty.flags & 8 /* EnumMember */)) {
+                        if (errorReporter) {
+                            errorReporter(ts.Diagnostics.Property_0_is_missing_in_type_1, property.name, typeToString(getDeclaredTypeOfSymbol(targetSymbol), /*enclosingDeclaration*/ undefined, 256 /* UseFullyQualifiedType */));
                         }
+                        enumRelation.set(id, false);
+                        return false;
                     }
-                    result.push(t);
                 }
             }
-            if (flags & 4096 /* Null */)
-                result.push(nullType);
-            if (flags & 2048 /* Undefined */)
-                result.push(undefinedType);
-            return result || types;
+            enumRelation.set(id, true);
+            return true;
         }
-        function visibilityToString(flags) {
-            if (flags === 8 /* Private */) {
-                return "private";
+        function isSimpleTypeRelatedTo(source, target, relation, errorReporter) {
+            var s = source.flags;
+            var t = target.flags;
+            if (t & 8192 /* Never */)
+                return false;
+            if (t & 1 /* Any */ || s & 8192 /* Never */)
+                return true;
+            if (s & 262178 /* StringLike */ && t & 2 /* String */)
+                return true;
+            if (s & 32 /* StringLiteral */ && s & 256 /* EnumLiteral */ &&
+                t & 32 /* StringLiteral */ && !(t & 256 /* EnumLiteral */) &&
+                source.value === target.value)
+                return true;
+            if (s & 84 /* NumberLike */ && t & 4 /* Number */)
+                return true;
+            if (s & 64 /* NumberLiteral */ && s & 256 /* EnumLiteral */ &&
+                t & 64 /* NumberLiteral */ && !(t & 256 /* EnumLiteral */) &&
+                source.value === target.value)
+                return true;
+            if (s & 136 /* BooleanLike */ && t & 8 /* Boolean */)
+                return true;
+            if (s & 16 /* Enum */ && t & 16 /* Enum */ && isEnumTypeRelatedTo(source.symbol, target.symbol, errorReporter))
+                return true;
+            if (s & 256 /* EnumLiteral */ && t & 256 /* EnumLiteral */) {
+                if (s & 65536 /* Union */ && t & 65536 /* Union */ && isEnumTypeRelatedTo(source.symbol, target.symbol, errorReporter))
+                    return true;
+                if (s & 224 /* Literal */ && t & 224 /* Literal */ &&
+                    source.value === target.value &&
+                    isEnumTypeRelatedTo(getParentOfSymbol(source.symbol), getParentOfSymbol(target.symbol), errorReporter))
+                    return true;
             }
-            if (flags === 16 /* Protected */) {
-                return "protected";
+            if (s & 2048 /* Undefined */ && (!strictNullChecks || t & (2048 /* Undefined */ | 1024 /* Void */)))
+                return true;
+            if (s & 4096 /* Null */ && (!strictNullChecks || t & 4096 /* Null */))
+                return true;
+            if (s & 32768 /* Object */ && t & 16777216 /* NonPrimitive */)
+                return true;
+            if (relation === assignableRelation || relation === comparableRelation) {
+                if (s & 1 /* Any */)
+                    return true;
+                // Type number or any numeric literal type is assignable to any numeric enum type or any
+                // numeric enum literal type. This rule exists for backwards compatibility reasons because
+                // bit-flag enum types sometimes look like literal enum types with numeric literal values.
+                if (s & (4 /* Number */ | 64 /* NumberLiteral */) && !(s & 256 /* EnumLiteral */) && (t & 16 /* Enum */ || t & 64 /* NumberLiteral */ && t & 256 /* EnumLiteral */))
+                    return true;
             }
-            return "public";
+            return false;
         }
-        function getTypeAliasForTypeLiteral(type) {
-            if (type.symbol && type.symbol.flags & 2048 /* TypeLiteral */) {
-                var node = type.symbol.declarations[0].parent;
-                while (node.kind === 164 /* ParenthesizedType */) {
-                    node = node.parent;
-                }
-                if (node.kind === 223 /* TypeAliasDeclaration */) {
-                    return getSymbolOfNode(node);
+        function isTypeRelatedTo(source, target, relation) {
+            if (source.flags & 96 /* StringOrNumberLiteral */ && source.flags & 1048576 /* FreshLiteral */) {
+                source = source.regularType;
+            }
+            if (target.flags & 96 /* StringOrNumberLiteral */ && target.flags & 1048576 /* FreshLiteral */) {
+                target = target.regularType;
+            }
+            if (source === target || relation !== identityRelation && isSimpleTypeRelatedTo(source, target, relation)) {
+                return true;
+            }
+            if (source.flags & 32768 /* Object */ && target.flags & 32768 /* Object */) {
+                var id = relation !== identityRelation || source.id < target.id ? source.id + "," + target.id : target.id + "," + source.id;
+                var related = relation.get(id);
+                if (related !== undefined) {
+                    return related === 1 /* Succeeded */;
                 }
             }
-            return undefined;
-        }
-        function isTopLevelInExternalModuleAugmentation(node) {
-            return node && node.parent &&
-                node.parent.kind === 226 /* ModuleBlock */ &&
-                ts.isExternalModuleAugmentation(node.parent.parent);
-        }
-        function literalTypeToString(type) {
-            return type.flags & 32 /* StringLiteral */ ? "\"" + ts.escapeString(type.text) + "\"" : type.text;
+            if (source.flags & 1032192 /* StructuredOrTypeVariable */ || target.flags & 1032192 /* StructuredOrTypeVariable */) {
+                return checkTypeRelatedTo(source, target, relation, /*errorNode*/ undefined);
+            }
+            return false;
         }
-        function getSymbolDisplayBuilder() {
-            function getNameOfSymbol(symbol) {
-                if (symbol.declarations && symbol.declarations.length) {
-                    var declaration = symbol.declarations[0];
-                    if (declaration.name) {
-                        return ts.declarationNameToString(declaration.name);
+        /**
+         * Checks if 'source' is related to 'target' (e.g.: is a assignable to).
+         * @param source The left-hand-side of the relation.
+         * @param target The right-hand-side of the relation.
+         * @param relation The relation considered. One of 'identityRelation', 'subtypeRelation', 'assignableRelation', or 'comparableRelation'.
+         * Used as both to determine which checks are performed and as a cache of previously computed results.
+         * @param errorNode The suggested node upon which all errors will be reported, if defined. This may or may not be the actual node used.
+         * @param headMessage If the error chain should be prepended by a head message, then headMessage will be used.
+         * @param containingMessageChain A chain of errors to prepend any new errors found.
+         */
+        function checkTypeRelatedTo(source, target, relation, errorNode, headMessage, containingMessageChain) {
+            var errorInfo;
+            var sourceStack;
+            var targetStack;
+            var maybeStack;
+            var expandingFlags;
+            var depth = 0;
+            var overflow = false;
+            var isIntersectionConstituent = false;
+            ts.Debug.assert(relation !== identityRelation || !errorNode, "no error reporting in identity checking");
+            var result = isRelatedTo(source, target, /*reportErrors*/ !!errorNode, headMessage);
+            if (overflow) {
+                error(errorNode, ts.Diagnostics.Excessive_stack_depth_comparing_types_0_and_1, typeToString(source), typeToString(target));
+            }
+            else if (errorInfo) {
+                if (containingMessageChain) {
+                    errorInfo = ts.concatenateDiagnosticMessageChains(containingMessageChain, errorInfo);
+                }
+                diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(errorNode, errorInfo));
+            }
+            return result !== 0 /* False */;
+            function reportError(message, arg0, arg1, arg2) {
+                ts.Debug.assert(!!errorNode);
+                errorInfo = ts.chainDiagnosticMessages(errorInfo, message, arg0, arg1, arg2);
+            }
+            function reportRelationError(message, source, target) {
+                var sourceType = typeToString(source);
+                var targetType = typeToString(target);
+                if (sourceType === targetType) {
+                    sourceType = typeToString(source, /*enclosingDeclaration*/ undefined, 256 /* UseFullyQualifiedType */);
+                    targetType = typeToString(target, /*enclosingDeclaration*/ undefined, 256 /* UseFullyQualifiedType */);
+                }
+                if (!message) {
+                    if (relation === comparableRelation) {
+                        message = ts.Diagnostics.Type_0_is_not_comparable_to_type_1;
                     }
-                    switch (declaration.kind) {
-                        case 192 /* ClassExpression */:
-                            return "(Anonymous class)";
-                        case 179 /* FunctionExpression */:
-                        case 180 /* ArrowFunction */:
-                            return "(Anonymous function)";
+                    else if (sourceType === targetType) {
+                        message = ts.Diagnostics.Type_0_is_not_assignable_to_type_1_Two_different_types_with_this_name_exist_but_they_are_unrelated;
+                    }
+                    else {
+                        message = ts.Diagnostics.Type_0_is_not_assignable_to_type_1;
                     }
                 }
-                return symbol.name;
+                reportError(message, sourceType, targetType);
             }
-            /**
-             * Writes only the name of the symbol out to the writer. Uses the original source text
-             * for the name of the symbol if it is available to match how the user wrote the name.
-             */
-            function appendSymbolNameOnly(symbol, writer) {
-                writer.writeSymbol(getNameOfSymbol(symbol), symbol);
+            function tryElaborateErrorsForPrimitivesAndObjects(source, target) {
+                var sourceType = typeToString(source);
+                var targetType = typeToString(target);
+                if ((globalStringType === source && stringType === target) ||
+                    (globalNumberType === source && numberType === target) ||
+                    (globalBooleanType === source && booleanType === target) ||
+                    (getGlobalESSymbolType(/*reportErrors*/ false) === source && esSymbolType === target)) {
+                    reportError(ts.Diagnostics._0_is_a_primitive_but_1_is_a_wrapper_object_Prefer_using_0_when_possible, targetType, sourceType);
+                }
+            }
+            function isUnionOrIntersectionTypeWithoutNullableConstituents(type) {
+                if (!(type.flags & 196608 /* UnionOrIntersection */)) {
+                    return false;
+                }
+                // at this point we know that this is union or intersection type possibly with nullable constituents.
+                // check if we still will have compound type if we ignore nullable components.
+                var seenNonNullable = false;
+                for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                    var t = _a[_i];
+                    if (t.flags & 6144 /* Nullable */) {
+                        continue;
+                    }
+                    if (seenNonNullable) {
+                        return true;
+                    }
+                    seenNonNullable = true;
+                }
+                return false;
             }
             /**
-             * Writes a property access or element access with the name of the symbol out to the writer.
-             * Uses the original source text for the name of the symbol if it is available to match how the user wrote the name,
-             * ensuring that any names written with literals use element accesses.
+             * Compare two types and return
+             * * Ternary.True if they are related with no assumptions,
+             * * Ternary.Maybe if they are related with assumptions of other relationships, or
+             * * Ternary.False if they are not related.
              */
-            function appendPropertyOrElementAccessForSymbol(symbol, writer) {
-                var symbolName = getNameOfSymbol(symbol);
-                var firstChar = symbolName.charCodeAt(0);
-                var needsElementAccess = !ts.isIdentifierStart(firstChar, languageVersion);
-                if (needsElementAccess) {
-                    writePunctuation(writer, 19 /* OpenBracketToken */);
-                    if (ts.isSingleOrDoubleQuote(firstChar)) {
-                        writer.writeStringLiteral(symbolName);
+            function isRelatedTo(source, target, reportErrors, headMessage) {
+                if (source.flags & 96 /* StringOrNumberLiteral */ && source.flags & 1048576 /* FreshLiteral */) {
+                    source = source.regularType;
+                }
+                if (target.flags & 96 /* StringOrNumberLiteral */ && target.flags & 1048576 /* FreshLiteral */) {
+                    target = target.regularType;
+                }
+                // both types are the same - covers 'they are the same primitive type or both are Any' or the same type parameter cases
+                if (source === target)
+                    return -1 /* True */;
+                if (relation === identityRelation) {
+                    return isIdenticalTo(source, target);
+                }
+                if (isSimpleTypeRelatedTo(source, target, relation, reportErrors ? reportError : undefined))
+                    return -1 /* True */;
+                if (getObjectFlags(source) & 128 /* ObjectLiteral */ && source.flags & 1048576 /* FreshLiteral */) {
+                    if (hasExcessProperties(source, target, reportErrors)) {
+                        if (reportErrors) {
+                            reportRelationError(headMessage, source, target);
+                        }
+                        return 0 /* False */;
                     }
-                    else {
-                        writer.writeSymbol(symbolName, symbol);
+                    // Above we check for excess properties with respect to the entire target type. When union
+                    // and intersection types are further deconstructed on the target side, we don't want to
+                    // make the check again (as it might fail for a partial target type). Therefore we obtain
+                    // the regular source type and proceed with that.
+                    if (isUnionOrIntersectionTypeWithoutNullableConstituents(target)) {
+                        source = getRegularTypeOfObjectLiteral(source);
+                    }
+                }
+                if (relation !== comparableRelation &&
+                    !(source.flags & 196608 /* UnionOrIntersection */) &&
+                    !(target.flags & 65536 /* Union */) &&
+                    !isIntersectionConstituent &&
+                    source !== globalObjectType &&
+                    getPropertiesOfType(source).length > 0 &&
+                    isWeakType(target) &&
+                    !hasCommonProperties(source, target)) {
+                    if (reportErrors) {
+                        reportError(ts.Diagnostics.Type_0_has_no_properties_in_common_with_type_1, typeToString(source), typeToString(target));
                     }
-                    writePunctuation(writer, 20 /* CloseBracketToken */);
+                    return 0 /* False */;
+                }
+                var result = 0 /* False */;
+                var saveErrorInfo = errorInfo;
+                var saveIsIntersectionConstituent = isIntersectionConstituent;
+                isIntersectionConstituent = false;
+                // Note that these checks are specifically ordered to produce correct results. In particular,
+                // we need to deconstruct unions before intersections (because unions are always at the top),
+                // and we need to handle "each" relations before "some" relations for the same kind of type.
+                if (source.flags & 65536 /* Union */) {
+                    result = relation === comparableRelation ?
+                        someTypeRelatedToType(source, target, reportErrors && !(source.flags & 8190 /* Primitive */)) :
+                        eachTypeRelatedToType(source, target, reportErrors && !(source.flags & 8190 /* Primitive */));
                 }
                 else {
-                    writePunctuation(writer, 21 /* DotToken */);
-                    writer.writeSymbol(symbolName, symbol);
+                    if (target.flags & 65536 /* Union */) {
+                        result = typeRelatedToSomeType(source, target, reportErrors && !(source.flags & 8190 /* Primitive */) && !(target.flags & 8190 /* Primitive */));
+                    }
+                    else if (target.flags & 131072 /* Intersection */) {
+                        isIntersectionConstituent = true;
+                        result = typeRelatedToEachType(source, target, reportErrors);
+                    }
+                    else if (source.flags & 131072 /* Intersection */) {
+                        // Check to see if any constituents of the intersection are immediately related to the target.
+                        //
+                        // Don't report errors though. Checking whether a constituent is related to the source is not actually
+                        // useful and leads to some confusing error messages. Instead it is better to let the below checks
+                        // take care of this, or to not elaborate at all. For instance,
+                        //
+                        //    - For an object type (such as 'C = A & B'), users are usually more interested in structural errors.
+                        //
+                        //    - For a union type (such as '(A | B) = (C & D)'), it's better to hold onto the whole intersection
+                        //          than to report that 'D' is not assignable to 'A' or 'B'.
+                        //
+                        //    - For a primitive type or type parameter (such as 'number = A & B') there is no point in
+                        //          breaking the intersection apart.
+                        result = someTypeRelatedToType(source, target, /*reportErrors*/ false);
+                    }
+                    if (!result && (source.flags & 1032192 /* StructuredOrTypeVariable */ || target.flags & 1032192 /* StructuredOrTypeVariable */)) {
+                        if (result = recursiveTypeRelatedTo(source, target, reportErrors)) {
+                            errorInfo = saveErrorInfo;
+                        }
+                    }
+                }
+                isIntersectionConstituent = saveIsIntersectionConstituent;
+                if (!result && reportErrors) {
+                    if (source.flags & 32768 /* Object */ && target.flags & 8190 /* Primitive */) {
+                        tryElaborateErrorsForPrimitivesAndObjects(source, target);
+                    }
+                    else if (source.symbol && source.flags & 32768 /* Object */ && globalObjectType === source) {
+                        reportError(ts.Diagnostics.The_Object_type_is_assignable_to_very_few_other_types_Did_you_mean_to_use_the_any_type_instead);
+                    }
+                    reportRelationError(headMessage, source, target);
+                }
+                return result;
+            }
+            function isIdenticalTo(source, target) {
+                var result;
+                if (source.flags & 32768 /* Object */ && target.flags & 32768 /* Object */) {
+                    return recursiveTypeRelatedTo(source, target, /*reportErrors*/ false);
+                }
+                if (source.flags & 65536 /* Union */ && target.flags & 65536 /* Union */ ||
+                    source.flags & 131072 /* Intersection */ && target.flags & 131072 /* Intersection */) {
+                    if (result = eachTypeRelatedToSomeType(source, target)) {
+                        if (result &= eachTypeRelatedToSomeType(target, source)) {
+                            return result;
+                        }
+                    }
                 }
+                return 0 /* False */;
             }
-            /**
-             * Enclosing declaration is optional when we don't want to get qualified name in the enclosing declaration scope
-             * Meaning needs to be specified if the enclosing declaration is given
-             */
-            function buildSymbolDisplay(symbol, writer, enclosingDeclaration, meaning, flags, typeFlags) {
-                var parentSymbol;
-                function appendParentTypeArgumentsAndSymbolName(symbol) {
-                    if (parentSymbol) {
-                        // Write type arguments of instantiated class/interface here
-                        if (flags & 1 /* WriteTypeParametersOrArguments */) {
-                            if (symbol.flags & 16777216 /* Instantiated */) {
-                                buildDisplayForTypeArgumentsAndDelimiters(getTypeParametersOfClassOrInterface(parentSymbol), symbol.mapper, writer, enclosingDeclaration);
+            function hasExcessProperties(source, target, reportErrors) {
+                if (maybeTypeOfKind(target, 32768 /* Object */) && !(getObjectFlags(target) & 512 /* ObjectLiteralPatternWithComputedProperties */)) {
+                    var isComparingJsxAttributes = !!(source.flags & 33554432 /* JsxAttributes */);
+                    if ((relation === assignableRelation || relation === comparableRelation) &&
+                        (isTypeSubsetOf(globalObjectType, target) || (!isComparingJsxAttributes && isEmptyObjectType(target)))) {
+                        return false;
+                    }
+                    var _loop_4 = function (prop) {
+                        if (!isKnownProperty(target, prop.name, isComparingJsxAttributes)) {
+                            if (reportErrors) {
+                                // We know *exactly* where things went wrong when comparing the types.
+                                // Use this property as the error node as this will be more helpful in
+                                // reasoning about what went wrong.
+                                ts.Debug.assert(!!errorNode);
+                                if (ts.isJsxAttributes(errorNode) || ts.isJsxOpeningLikeElement(errorNode)) {
+                                    // JsxAttributes has an object-literal flag and undergo same type-assignablity check as normal object-literal.
+                                    // However, using an object-literal error message will be very confusing to the users so we give different a message.
+                                    reportError(ts.Diagnostics.Property_0_does_not_exist_on_type_1, symbolToString(prop), typeToString(target));
+                                }
+                                else {
+                                    // use the property's value declaration if the property is assigned inside the literal itself
+                                    var objectLiteralDeclaration_1 = source.symbol && ts.firstOrUndefined(source.symbol.declarations);
+                                    if (prop.valueDeclaration && ts.findAncestor(prop.valueDeclaration, function (d) { return d === objectLiteralDeclaration_1; })) {
+                                        errorNode = prop.valueDeclaration;
+                                    }
+                                    reportError(ts.Diagnostics.Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1, symbolToString(prop), typeToString(target));
+                                }
                             }
-                            else {
-                                buildTypeParameterDisplayFromSymbol(parentSymbol, writer, enclosingDeclaration);
+                            return { value: true };
+                        }
+                    };
+                    for (var _i = 0, _a = getPropertiesOfObjectType(source); _i < _a.length; _i++) {
+                        var prop = _a[_i];
+                        var state_2 = _loop_4(prop);
+                        if (typeof state_2 === "object")
+                            return state_2.value;
+                    }
+                }
+                return false;
+            }
+            function eachTypeRelatedToSomeType(source, target) {
+                var result = -1 /* True */;
+                var sourceTypes = source.types;
+                for (var _i = 0, sourceTypes_1 = sourceTypes; _i < sourceTypes_1.length; _i++) {
+                    var sourceType = sourceTypes_1[_i];
+                    var related = typeRelatedToSomeType(sourceType, target, /*reportErrors*/ false);
+                    if (!related) {
+                        return 0 /* False */;
+                    }
+                    result &= related;
+                }
+                return result;
+            }
+            function typeRelatedToSomeType(source, target, reportErrors) {
+                var targetTypes = target.types;
+                if (target.flags & 65536 /* Union */ && containsType(targetTypes, source)) {
+                    return -1 /* True */;
+                }
+                for (var _i = 0, targetTypes_1 = targetTypes; _i < targetTypes_1.length; _i++) {
+                    var type = targetTypes_1[_i];
+                    var related = isRelatedTo(source, type, /*reportErrors*/ false);
+                    if (related) {
+                        return related;
+                    }
+                }
+                if (reportErrors) {
+                    var discriminantType = findMatchingDiscriminantType(source, target);
+                    isRelatedTo(source, discriminantType || targetTypes[targetTypes.length - 1], /*reportErrors*/ true);
+                }
+                return 0 /* False */;
+            }
+            function findMatchingDiscriminantType(source, target) {
+                var sourceProperties = getPropertiesOfObjectType(source);
+                if (sourceProperties) {
+                    for (var _i = 0, sourceProperties_1 = sourceProperties; _i < sourceProperties_1.length; _i++) {
+                        var sourceProperty = sourceProperties_1[_i];
+                        if (isDiscriminantProperty(target, sourceProperty.name)) {
+                            var sourceType = getTypeOfSymbol(sourceProperty);
+                            for (var _a = 0, _b = target.types; _a < _b.length; _a++) {
+                                var type = _b[_a];
+                                var targetType = getTypeOfPropertyOfType(type, sourceProperty.name);
+                                if (targetType && isRelatedTo(sourceType, targetType)) {
+                                    return type;
+                                }
                             }
                         }
-                        appendPropertyOrElementAccessForSymbol(symbol, writer);
+                    }
+                }
+            }
+            function typeRelatedToEachType(source, target, reportErrors) {
+                var result = -1 /* True */;
+                var targetTypes = target.types;
+                for (var _i = 0, targetTypes_2 = targetTypes; _i < targetTypes_2.length; _i++) {
+                    var targetType = targetTypes_2[_i];
+                    var related = isRelatedTo(source, targetType, reportErrors);
+                    if (!related) {
+                        return 0 /* False */;
+                    }
+                    result &= related;
+                }
+                return result;
+            }
+            function someTypeRelatedToType(source, target, reportErrors) {
+                var sourceTypes = source.types;
+                if (source.flags & 65536 /* Union */ && containsType(sourceTypes, target)) {
+                    return -1 /* True */;
+                }
+                var len = sourceTypes.length;
+                for (var i = 0; i < len; i++) {
+                    var related = isRelatedTo(sourceTypes[i], target, reportErrors && i === len - 1);
+                    if (related) {
+                        return related;
+                    }
+                }
+                return 0 /* False */;
+            }
+            function eachTypeRelatedToType(source, target, reportErrors) {
+                var result = -1 /* True */;
+                var sourceTypes = source.types;
+                for (var _i = 0, sourceTypes_2 = sourceTypes; _i < sourceTypes_2.length; _i++) {
+                    var sourceType = sourceTypes_2[_i];
+                    var related = isRelatedTo(sourceType, target, reportErrors);
+                    if (!related) {
+                        return 0 /* False */;
+                    }
+                    result &= related;
+                }
+                return result;
+            }
+            function typeArgumentsRelatedTo(source, target, reportErrors) {
+                var sources = source.typeArguments || emptyArray;
+                var targets = target.typeArguments || emptyArray;
+                if (sources.length !== targets.length && relation === identityRelation) {
+                    return 0 /* False */;
+                }
+                var length = sources.length <= targets.length ? sources.length : targets.length;
+                var result = -1 /* True */;
+                for (var i = 0; i < length; i++) {
+                    var related = isRelatedTo(sources[i], targets[i], reportErrors);
+                    if (!related) {
+                        return 0 /* False */;
+                    }
+                    result &= related;
+                }
+                return result;
+            }
+            // Determine if possibly recursive types are related. First, check if the result is already available in the global cache.
+            // Second, check if we have already started a comparison of the given two types in which case we assume the result to be true.
+            // Third, check if both types are part of deeply nested chains of generic type instantiations and if so assume the types are
+            // equal and infinitely expanding. Fourth, if we have reached a depth of 100 nested comparisons, assume we have runaway recursion
+            // and issue an error. Otherwise, actually compare the structure of the two types.
+            function recursiveTypeRelatedTo(source, target, reportErrors) {
+                if (overflow) {
+                    return 0 /* False */;
+                }
+                var id = relation !== identityRelation || source.id < target.id ? source.id + "," + target.id : target.id + "," + source.id;
+                var related = relation.get(id);
+                if (related !== undefined) {
+                    if (reportErrors && related === 2 /* Failed */) {
+                        // We are elaborating errors and the cached result is an unreported failure. Record the result as a reported
+                        // failure and continue computing the relation such that errors get reported.
+                        relation.set(id, 3 /* FailedAndReported */);
                     }
                     else {
-                        appendSymbolNameOnly(symbol, writer);
+                        return related === 1 /* Succeeded */ ? -1 /* True */ : 0 /* False */;
                     }
-                    parentSymbol = symbol;
                 }
-                // Let the writer know we just wrote out a symbol.  The declaration emitter writer uses
-                // this to determine if an import it has previously seen (and not written out) needs
-                // to be written to the file once the walk of the tree is complete.
-                //
-                // NOTE(cyrusn): This approach feels somewhat unfortunate.  A simple pass over the tree
-                // up front (for example, during checking) could determine if we need to emit the imports
-                // and we could then access that data during declaration emit.
-                writer.trackSymbol(symbol, enclosingDeclaration, meaning);
-                /** @param endOfChain Set to false for recursive calls; non-recursive calls should always output something. */
-                function walkSymbol(symbol, meaning, endOfChain) {
-                    var accessibleSymbolChain = getAccessibleSymbolChain(symbol, enclosingDeclaration, meaning, !!(flags & 2 /* UseOnlyExternalAliasing */));
-                    if (!accessibleSymbolChain ||
-                        needsQualification(accessibleSymbolChain[0], enclosingDeclaration, accessibleSymbolChain.length === 1 ? meaning : getQualifiedLeftMeaning(meaning))) {
-                        // Go up and add our parent.
-                        var parent_8 = getParentOfSymbol(accessibleSymbolChain ? accessibleSymbolChain[0] : symbol);
-                        if (parent_8) {
-                            walkSymbol(parent_8, getQualifiedLeftMeaning(meaning), /*endOfChain*/ false);
-                        }
-                    }
-                    if (accessibleSymbolChain) {
-                        for (var _i = 0, accessibleSymbolChain_1 = accessibleSymbolChain; _i < accessibleSymbolChain_1.length; _i++) {
-                            var accessibleSymbol = accessibleSymbolChain_1[_i];
-                            appendParentTypeArgumentsAndSymbolName(accessibleSymbol);
+                if (depth > 0) {
+                    for (var i = 0; i < depth; i++) {
+                        // If source and target are already being compared, consider them related with assumptions
+                        if (maybeStack[i].get(id)) {
+                            return 1 /* Maybe */;
                         }
                     }
-                    else if (
-                    // If this is the last part of outputting the symbol, always output. The cases apply only to parent symbols.
-                    endOfChain ||
-                        // If a parent symbol is an external module, don't write it. (We prefer just `x` vs `"foo/bar".x`.)
-                        !(!parentSymbol && ts.forEach(symbol.declarations, hasExternalModuleSymbol)) &&
-                            // If a parent symbol is an anonymous type, don't write it.
-                            !(symbol.flags & (2048 /* TypeLiteral */ | 4096 /* ObjectLiteral */))) {
-                        appendParentTypeArgumentsAndSymbolName(symbol);
+                    if (depth === 100) {
+                        overflow = true;
+                        return 0 /* False */;
                     }
                 }
-                // Get qualified name if the symbol is not a type parameter
-                // and there is an enclosing declaration or we specifically
-                // asked for it
-                var isTypeParameter = symbol.flags & 262144 /* TypeParameter */;
-                var typeFormatFlag = 128 /* UseFullyQualifiedType */ & typeFlags;
-                if (!isTypeParameter && (enclosingDeclaration || typeFormatFlag)) {
-                    walkSymbol(symbol, meaning, /*endOfChain*/ true);
+                else {
+                    sourceStack = [];
+                    targetStack = [];
+                    maybeStack = [];
+                    expandingFlags = 0;
+                }
+                sourceStack[depth] = source;
+                targetStack[depth] = target;
+                maybeStack[depth] = ts.createMap();
+                maybeStack[depth].set(id, 1 /* Succeeded */);
+                depth++;
+                var saveExpandingFlags = expandingFlags;
+                if (!(expandingFlags & 1) && isDeeplyNestedType(source, sourceStack, depth))
+                    expandingFlags |= 1;
+                if (!(expandingFlags & 2) && isDeeplyNestedType(target, targetStack, depth))
+                    expandingFlags |= 2;
+                var result = expandingFlags !== 3 ? structuredTypeRelatedTo(source, target, reportErrors) : 1 /* Maybe */;
+                expandingFlags = saveExpandingFlags;
+                depth--;
+                if (result) {
+                    var maybeCache = maybeStack[depth];
+                    // If result is definitely true, copy assumptions to global cache, else copy to next level up
+                    var destinationCache = (result === -1 /* True */ || depth === 0) ? relation : maybeStack[depth - 1];
+                    ts.copyEntries(maybeCache, destinationCache);
                 }
                 else {
-                    appendParentTypeArgumentsAndSymbolName(symbol);
+                    // A false result goes straight into global cache (when something is false under assumptions it
+                    // will also be false without assumptions)
+                    relation.set(id, reportErrors ? 3 /* FailedAndReported */ : 2 /* Failed */);
                 }
+                return result;
             }
-            function buildTypeDisplay(type, writer, enclosingDeclaration, globalFlags, symbolStack) {
-                var globalFlagsToPass = globalFlags & 16 /* WriteOwnNameForAnyLike */;
-                var inObjectTypeLiteral = false;
-                return writeType(type, globalFlags);
-                function writeType(type, flags) {
-                    var nextFlags = flags & ~512 /* InTypeAlias */;
-                    // Write undefined/null type as any
-                    if (type.flags & 16015 /* Intrinsic */) {
-                        // Special handling for unknown / resolving types, they should show up as any and not unknown or __resolving
-                        writer.writeKeyword(!(globalFlags & 16 /* WriteOwnNameForAnyLike */) && isTypeAny(type)
-                            ? "any"
-                            : type.intrinsicName);
-                    }
-                    else if (type.flags & 268435456 /* ThisType */) {
-                        if (inObjectTypeLiteral) {
-                            writer.reportInaccessibleThisError();
-                        }
-                        writer.writeKeyword("this");
-                    }
-                    else if (type.flags & 131072 /* Reference */) {
-                        writeTypeReference(type, nextFlags);
-                    }
-                    else if (type.flags & 256 /* EnumLiteral */) {
-                        buildSymbolDisplay(getParentOfSymbol(type.symbol), writer, enclosingDeclaration, 793064 /* Type */, 0 /* None */, nextFlags);
-                        writePunctuation(writer, 21 /* DotToken */);
-                        appendSymbolNameOnly(type.symbol, writer);
-                    }
-                    else if (type.flags & (32768 /* Class */ | 65536 /* Interface */ | 16 /* Enum */ | 16384 /* TypeParameter */)) {
-                        // The specified symbol flags need to be reinterpreted as type flags
-                        buildSymbolDisplay(type.symbol, writer, enclosingDeclaration, 793064 /* Type */, 0 /* None */, nextFlags);
-                    }
-                    else if (!(flags & 512 /* InTypeAlias */) && type.flags & (2097152 /* Anonymous */ | 1572864 /* UnionOrIntersection */) && type.aliasSymbol &&
-                        isSymbolAccessible(type.aliasSymbol, enclosingDeclaration, 793064 /* Type */, /*shouldComputeAliasesToMakeVisible*/ false).accessibility === 0 /* Accessible */) {
-                        // Only write out inferred type with its corresponding type-alias if type-alias is visible
-                        var typeArguments = type.aliasTypeArguments;
-                        writeSymbolTypeReference(type.aliasSymbol, typeArguments, 0, typeArguments ? typeArguments.length : 0, nextFlags);
-                    }
-                    else if (type.flags & 1572864 /* UnionOrIntersection */) {
-                        writeUnionOrIntersectionType(type, nextFlags);
-                    }
-                    else if (type.flags & 2097152 /* Anonymous */) {
-                        writeAnonymousType(type, nextFlags);
-                    }
-                    else if (type.flags & 96 /* StringOrNumberLiteral */) {
-                        writer.writeStringLiteral(literalTypeToString(type));
-                    }
-                    else {
-                        // Should never get here
-                        // { ... }
-                        writePunctuation(writer, 15 /* OpenBraceToken */);
-                        writeSpace(writer);
-                        writePunctuation(writer, 22 /* DotDotDotToken */);
-                        writeSpace(writer);
-                        writePunctuation(writer, 16 /* CloseBraceToken */);
-                    }
-                }
-                function writeTypeList(types, delimiter) {
-                    for (var i = 0; i < types.length; i++) {
-                        if (i > 0) {
-                            if (delimiter !== 24 /* CommaToken */) {
-                                writeSpace(writer);
+            function structuredTypeRelatedTo(source, target, reportErrors) {
+                var result;
+                var saveErrorInfo = errorInfo;
+                if (target.flags & 16384 /* TypeParameter */) {
+                    // A source type { [P in keyof T]: X } is related to a target type T if X is related to T[P].
+                    if (getObjectFlags(source) & 32 /* Mapped */ && getConstraintTypeFromMappedType(source) === getIndexType(target)) {
+                        if (!source.declaration.questionToken) {
+                            var templateType = getTemplateTypeFromMappedType(source);
+                            var indexedAccessType = getIndexedAccessType(target, getTypeParameterFromMappedType(source));
+                            if (result = isRelatedTo(templateType, indexedAccessType, reportErrors)) {
+                                return result;
                             }
-                            writePunctuation(writer, delimiter);
-                            writeSpace(writer);
                         }
-                        writeType(types[i], delimiter === 24 /* CommaToken */ ? 0 /* None */ : 64 /* InElementType */);
                     }
                 }
-                function writeSymbolTypeReference(symbol, typeArguments, pos, end, flags) {
-                    // Unnamed function expressions and arrow functions have reserved names that we don't want to display
-                    if (symbol.flags & 32 /* Class */ || !isReservedMemberName(symbol.name)) {
-                        buildSymbolDisplay(symbol, writer, enclosingDeclaration, 793064 /* Type */, 0 /* None */, flags);
+                else if (target.flags & 262144 /* Index */) {
+                    // A keyof S is related to a keyof T if T is related to S.
+                    if (source.flags & 262144 /* Index */) {
+                        if (result = isRelatedTo(target.type, source.type, /*reportErrors*/ false)) {
+                            return result;
+                        }
                     }
-                    if (pos < end) {
-                        writePunctuation(writer, 25 /* LessThanToken */);
-                        writeType(typeArguments[pos], 256 /* InFirstTypeArgument */);
-                        pos++;
-                        while (pos < end) {
-                            writePunctuation(writer, 24 /* CommaToken */);
-                            writeSpace(writer);
-                            writeType(typeArguments[pos], 0 /* None */);
-                            pos++;
+                    // A type S is assignable to keyof T if S is assignable to keyof C, where C is the
+                    // constraint of T.
+                    var constraint = getConstraintOfType(target.type);
+                    if (constraint) {
+                        if (result = isRelatedTo(source, getIndexType(constraint), reportErrors)) {
+                            return result;
                         }
-                        writePunctuation(writer, 27 /* GreaterThanToken */);
                     }
                 }
-                function writeTypeReference(type, flags) {
-                    var typeArguments = type.typeArguments || emptyArray;
-                    if (type.target === globalArrayType && !(flags & 1 /* WriteArrayAsGenericType */)) {
-                        writeType(typeArguments[0], 64 /* InElementType */);
-                        writePunctuation(writer, 19 /* OpenBracketToken */);
-                        writePunctuation(writer, 20 /* CloseBracketToken */);
+                else if (target.flags & 524288 /* IndexedAccess */) {
+                    // A type S is related to a type T[K] if S is related to A[K], where K is string-like and
+                    // A is the apparent type of S.
+                    var constraint = getConstraintOfType(target);
+                    if (constraint) {
+                        if (result = isRelatedTo(source, constraint, reportErrors)) {
+                            errorInfo = saveErrorInfo;
+                            return result;
+                        }
                     }
-                    else if (type.target.flags & 262144 /* Tuple */) {
-                        writePunctuation(writer, 19 /* OpenBracketToken */);
-                        writeTypeList(type.typeArguments.slice(0, getTypeReferenceArity(type)), 24 /* CommaToken */);
-                        writePunctuation(writer, 20 /* CloseBracketToken */);
+                }
+                if (source.flags & 16384 /* TypeParameter */) {
+                    // A source type T is related to a target type { [P in keyof T]: X } if T[P] is related to X.
+                    if (getObjectFlags(target) & 32 /* Mapped */ && getConstraintTypeFromMappedType(target) === getIndexType(source)) {
+                        var indexedAccessType = getIndexedAccessType(source, getTypeParameterFromMappedType(target));
+                        var templateType = getTemplateTypeFromMappedType(target);
+                        if (result = isRelatedTo(indexedAccessType, templateType, reportErrors)) {
+                            errorInfo = saveErrorInfo;
+                            return result;
+                        }
                     }
                     else {
-                        // Write the type reference in the format f<A>.g<B>.C<X, Y> where A and B are type arguments
-                        // for outer type parameters, and f and g are the respective declaring containers of those
-                        // type parameters.
-                        var outerTypeParameters = type.target.outerTypeParameters;
-                        var i = 0;
-                        if (outerTypeParameters) {
-                            var length_1 = outerTypeParameters.length;
-                            while (i < length_1) {
-                                // Find group of type arguments for type parameters with the same declaring container.
-                                var start = i;
-                                var parent_9 = getParentSymbolOfTypeParameter(outerTypeParameters[i]);
-                                do {
-                                    i++;
-                                } while (i < length_1 && getParentSymbolOfTypeParameter(outerTypeParameters[i]) === parent_9);
-                                // When type parameters are their own type arguments for the whole group (i.e. we have
-                                // the default outer type arguments), we don't show the group.
-                                if (!ts.rangeEquals(outerTypeParameters, typeArguments, start, i)) {
-                                    writeSymbolTypeReference(parent_9, typeArguments, start, i, flags);
-                                    writePunctuation(writer, 21 /* DotToken */);
-                                }
+                        var constraint = getConstraintOfTypeParameter(source);
+                        // A type parameter with no constraint is not related to the non-primitive object type.
+                        if (constraint || !(target.flags & 16777216 /* NonPrimitive */)) {
+                            if (!constraint || constraint.flags & 1 /* Any */) {
+                                constraint = emptyObjectType;
+                            }
+                            // The constraint may need to be further instantiated with its 'this' type.
+                            constraint = getTypeWithThisArgument(constraint, source);
+                            // Report constraint errors only if the constraint is not the empty object type
+                            var reportConstraintErrors = reportErrors && constraint !== emptyObjectType;
+                            if (result = isRelatedTo(constraint, target, reportConstraintErrors)) {
+                                errorInfo = saveErrorInfo;
+                                return result;
                             }
                         }
-                        var typeParameterCount = (type.target.typeParameters || emptyArray).length;
-                        writeSymbolTypeReference(type.symbol, typeArguments, i, typeParameterCount, flags);
                     }
                 }
-                function writeUnionOrIntersectionType(type, flags) {
-                    if (flags & 64 /* InElementType */) {
-                        writePunctuation(writer, 17 /* OpenParenToken */);
-                    }
-                    if (type.flags & 524288 /* Union */) {
-                        writeTypeList(formatUnionTypes(type.types), 47 /* BarToken */);
-                    }
-                    else {
-                        writeTypeList(type.types, 46 /* AmpersandToken */);
+                else if (source.flags & 524288 /* IndexedAccess */) {
+                    // A type S[K] is related to a type T if A[K] is related to T, where K is string-like and
+                    // A is the apparent type of S.
+                    var constraint = getConstraintOfType(source);
+                    if (constraint) {
+                        if (result = isRelatedTo(constraint, target, reportErrors)) {
+                            errorInfo = saveErrorInfo;
+                            return result;
+                        }
                     }
-                    if (flags & 64 /* InElementType */) {
-                        writePunctuation(writer, 18 /* CloseParenToken */);
+                    else if (target.flags & 524288 /* IndexedAccess */ && source.indexType === target.indexType) {
+                        // if we have indexed access types with identical index types, see if relationship holds for
+                        // the two object types.
+                        if (result = isRelatedTo(source.objectType, target.objectType, reportErrors)) {
+                            return result;
+                        }
                     }
                 }
-                function writeAnonymousType(type, flags) {
-                    var symbol = type.symbol;
-                    if (symbol) {
-                        // Always use 'typeof T' for type of class, enum, and module objects
-                        if (symbol.flags & (32 /* Class */ | 384 /* Enum */ | 512 /* ValueModule */)) {
-                            writeTypeOfSymbol(type, flags);
-                        }
-                        else if (shouldWriteTypeOfFunctionSymbol()) {
-                            writeTypeOfSymbol(type, flags);
+                else {
+                    if (getObjectFlags(source) & 4 /* Reference */ && getObjectFlags(target) & 4 /* Reference */ && source.target === target.target) {
+                        // We have type references to same target type, see if relationship holds for all type arguments
+                        if (result = typeArgumentsRelatedTo(source, target, reportErrors)) {
+                            return result;
                         }
-                        else if (ts.contains(symbolStack, symbol)) {
-                            // If type is an anonymous type literal in a type alias declaration, use type alias name
-                            var typeAlias = getTypeAliasForTypeLiteral(type);
-                            if (typeAlias) {
-                                // The specified symbol flags need to be reinterpreted as type flags
-                                buildSymbolDisplay(typeAlias, writer, enclosingDeclaration, 793064 /* Type */, 0 /* None */, flags);
-                            }
-                            else {
-                                // Recursive usage, use any
-                                writeKeyword(writer, 117 /* AnyKeyword */);
-                            }
+                    }
+                    // Even if relationship doesn't hold for unions, intersections, or generic type references,
+                    // it may hold in a structural comparison.
+                    var sourceIsPrimitive = !!(source.flags & 8190 /* Primitive */);
+                    if (relation !== identityRelation) {
+                        source = getApparentType(source);
+                    }
+                    // In a check of the form X = A & B, we will have previously checked if A relates to X or B relates
+                    // to X. Failing both of those we want to check if the aggregation of A and B's members structurally
+                    // relates to X. Thus, we include intersection types on the source side here.
+                    if (source.flags & (32768 /* Object */ | 131072 /* Intersection */) && target.flags & 32768 /* Object */) {
+                        // Report structural errors only if we haven't reported any errors yet
+                        var reportStructuralErrors = reportErrors && errorInfo === saveErrorInfo && !sourceIsPrimitive;
+                        if (isGenericMappedType(source) || isGenericMappedType(target)) {
+                            result = mappedTypeRelatedTo(source, target, reportStructuralErrors);
                         }
                         else {
-                            // Since instantiations of the same anonymous type have the same symbol, tracking symbols instead
-                            // of types allows us to catch circular references to instantiations of the same anonymous type
-                            if (!symbolStack) {
-                                symbolStack = [];
+                            result = propertiesRelatedTo(source, target, reportStructuralErrors);
+                            if (result) {
+                                result &= signaturesRelatedTo(source, target, 0 /* Call */, reportStructuralErrors);
+                                if (result) {
+                                    result &= signaturesRelatedTo(source, target, 1 /* Construct */, reportStructuralErrors);
+                                    if (result) {
+                                        result &= indexTypesRelatedTo(source, target, 0 /* String */, sourceIsPrimitive, reportStructuralErrors);
+                                        if (result) {
+                                            result &= indexTypesRelatedTo(source, target, 1 /* Number */, sourceIsPrimitive, reportStructuralErrors);
+                                        }
+                                    }
+                                }
                             }
-                            symbolStack.push(symbol);
-                            writeLiteralType(type, flags);
-                            symbolStack.pop();
                         }
-                    }
-                    else {
-                        // Anonymous types with no symbol are never circular
-                        writeLiteralType(type, flags);
-                    }
-                    function shouldWriteTypeOfFunctionSymbol() {
-                        var isStaticMethodSymbol = !!(symbol.flags & 8192 /* Method */ &&
-                            ts.forEach(symbol.declarations, function (declaration) { return ts.getModifierFlags(declaration) & 32 /* Static */; }));
-                        var isNonLocalFunctionSymbol = !!(symbol.flags & 16 /* Function */) &&
-                            (symbol.parent ||
-                                ts.forEach(symbol.declarations, function (declaration) {
-                                    return declaration.parent.kind === 256 /* SourceFile */ || declaration.parent.kind === 226 /* ModuleBlock */;
-                                }));
-                        if (isStaticMethodSymbol || isNonLocalFunctionSymbol) {
-                            // typeof is allowed only for static/non local functions
-                            return !!(flags & 2 /* UseTypeOfFunction */) ||
-                                (ts.contains(symbolStack, symbol)); // it is type of the symbol uses itself recursively
+                        if (result) {
+                            errorInfo = saveErrorInfo;
+                            return result;
                         }
                     }
                 }
-                function writeTypeOfSymbol(type, typeFormatFlags) {
-                    writeKeyword(writer, 101 /* TypeOfKeyword */);
-                    writeSpace(writer);
-                    buildSymbolDisplay(type.symbol, writer, enclosingDeclaration, 107455 /* Value */, 0 /* None */, typeFormatFlags);
-                }
-                function writeIndexSignature(info, keyword) {
-                    if (info) {
-                        if (info.isReadonly) {
-                            writeKeyword(writer, 128 /* ReadonlyKeyword */);
-                            writeSpace(writer);
+                return 0 /* False */;
+            }
+            // A type [P in S]: X is related to a type [Q in T]: Y if T is related to S and X' is
+            // related to Y, where X' is an instantiation of X in which P is replaced with Q. Notice
+            // that S and T are contra-variant whereas X and Y are co-variant.
+            function mappedTypeRelatedTo(source, target, reportErrors) {
+                if (isGenericMappedType(target)) {
+                    if (isGenericMappedType(source)) {
+                        var sourceReadonly = !!source.declaration.readonlyToken;
+                        var sourceOptional = !!source.declaration.questionToken;
+                        var targetReadonly = !!target.declaration.readonlyToken;
+                        var targetOptional = !!target.declaration.questionToken;
+                        var modifiersRelated = relation === identityRelation ?
+                            sourceReadonly === targetReadonly && sourceOptional === targetOptional :
+                            relation === comparableRelation || !sourceOptional || targetOptional;
+                        if (modifiersRelated) {
+                            var result_2;
+                            if (result_2 = isRelatedTo(getConstraintTypeFromMappedType(target), getConstraintTypeFromMappedType(source), reportErrors)) {
+                                var mapper = createTypeMapper([getTypeParameterFromMappedType(source)], [getTypeParameterFromMappedType(target)]);
+                                return result_2 & isRelatedTo(instantiateType(getTemplateTypeFromMappedType(source), mapper), getTemplateTypeFromMappedType(target), reportErrors);
+                            }
                         }
-                        writePunctuation(writer, 19 /* OpenBracketToken */);
-                        writer.writeParameter(info.declaration ? ts.declarationNameToString(info.declaration.parameters[0].name) : "x");
-                        writePunctuation(writer, 54 /* ColonToken */);
-                        writeSpace(writer);
-                        writeKeyword(writer, keyword);
-                        writePunctuation(writer, 20 /* CloseBracketToken */);
-                        writePunctuation(writer, 54 /* ColonToken */);
-                        writeSpace(writer);
-                        writeType(info.type, 0 /* None */);
-                        writePunctuation(writer, 23 /* SemicolonToken */);
-                        writer.writeLine();
-                    }
-                }
-                function writePropertyWithModifiers(prop) {
-                    if (isReadonlySymbol(prop)) {
-                        writeKeyword(writer, 128 /* ReadonlyKeyword */);
-                        writeSpace(writer);
                     }
-                    buildSymbolDisplay(prop, writer);
-                    if (prop.flags & 536870912 /* Optional */) {
-                        writePunctuation(writer, 53 /* QuestionToken */);
+                    else if (target.declaration.questionToken && isEmptyObjectType(source)) {
+                        return -1 /* True */;
                     }
                 }
-                function shouldAddParenthesisAroundFunctionType(callSignature, flags) {
-                    if (flags & 64 /* InElementType */) {
-                        return true;
-                    }
-                    else if (flags & 256 /* InFirstTypeArgument */) {
-                        // Add parenthesis around function type for the first type argument to avoid ambiguity
-                        var typeParameters = callSignature.target && (flags & 32 /* WriteTypeArgumentsOfSignature */) ?
-                            callSignature.target.typeParameters : callSignature.typeParameters;
-                        return typeParameters && typeParameters.length !== 0;
+                else if (relation !== identityRelation) {
+                    var resolved = resolveStructuredTypeMembers(target);
+                    if (isEmptyResolvedType(resolved) || resolved.stringIndexInfo && resolved.stringIndexInfo.type.flags & 1 /* Any */) {
+                        return -1 /* True */;
                     }
-                    return false;
                 }
-                function writeLiteralType(type, flags) {
-                    var resolved = resolveStructuredTypeMembers(type);
-                    if (!resolved.properties.length && !resolved.stringIndexInfo && !resolved.numberIndexInfo) {
-                        if (!resolved.callSignatures.length && !resolved.constructSignatures.length) {
-                            writePunctuation(writer, 15 /* OpenBraceToken */);
-                            writePunctuation(writer, 16 /* CloseBraceToken */);
-                            return;
+                return 0 /* False */;
+            }
+            function propertiesRelatedTo(source, target, reportErrors) {
+                if (relation === identityRelation) {
+                    return propertiesIdenticalTo(source, target);
+                }
+                var result = -1 /* True */;
+                var properties = getPropertiesOfObjectType(target);
+                var requireOptionalProperties = relation === subtypeRelation && !(getObjectFlags(source) & 128 /* ObjectLiteral */);
+                for (var _i = 0, properties_3 = properties; _i < properties_3.length; _i++) {
+                    var targetProp = properties_3[_i];
+                    var sourceProp = getPropertyOfType(source, targetProp.name);
+                    if (sourceProp !== targetProp) {
+                        if (!sourceProp) {
+                            if (!(targetProp.flags & 67108864 /* Optional */) || requireOptionalProperties) {
+                                if (reportErrors) {
+                                    reportError(ts.Diagnostics.Property_0_is_missing_in_type_1, symbolToString(targetProp), typeToString(source));
+                                }
+                                return 0 /* False */;
+                            }
                         }
-                        if (resolved.callSignatures.length === 1 && !resolved.constructSignatures.length) {
-                            var parenthesizeSignature = shouldAddParenthesisAroundFunctionType(resolved.callSignatures[0], flags);
-                            if (parenthesizeSignature) {
-                                writePunctuation(writer, 17 /* OpenParenToken */);
+                        else if (!(targetProp.flags & 16777216 /* Prototype */)) {
+                            var sourcePropFlags = ts.getDeclarationModifierFlagsFromSymbol(sourceProp);
+                            var targetPropFlags = ts.getDeclarationModifierFlagsFromSymbol(targetProp);
+                            if (sourcePropFlags & 8 /* Private */ || targetPropFlags & 8 /* Private */) {
+                                if (ts.getCheckFlags(sourceProp) & 256 /* ContainsPrivate */) {
+                                    if (reportErrors) {
+                                        reportError(ts.Diagnostics.Property_0_has_conflicting_declarations_and_is_inaccessible_in_type_1, symbolToString(sourceProp), typeToString(source));
+                                    }
+                                    return 0 /* False */;
+                                }
+                                if (sourceProp.valueDeclaration !== targetProp.valueDeclaration) {
+                                    if (reportErrors) {
+                                        if (sourcePropFlags & 8 /* Private */ && targetPropFlags & 8 /* Private */) {
+                                            reportError(ts.Diagnostics.Types_have_separate_declarations_of_a_private_property_0, symbolToString(targetProp));
+                                        }
+                                        else {
+                                            reportError(ts.Diagnostics.Property_0_is_private_in_type_1_but_not_in_type_2, symbolToString(targetProp), typeToString(sourcePropFlags & 8 /* Private */ ? source : target), typeToString(sourcePropFlags & 8 /* Private */ ? target : source));
+                                        }
+                                    }
+                                    return 0 /* False */;
+                                }
                             }
-                            buildSignatureDisplay(resolved.callSignatures[0], writer, enclosingDeclaration, globalFlagsToPass | 8 /* WriteArrowStyleSignature */, /*kind*/ undefined, symbolStack);
-                            if (parenthesizeSignature) {
-                                writePunctuation(writer, 18 /* CloseParenToken */);
+                            else if (targetPropFlags & 16 /* Protected */) {
+                                if (!isValidOverrideOf(sourceProp, targetProp)) {
+                                    if (reportErrors) {
+                                        reportError(ts.Diagnostics.Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2, symbolToString(targetProp), typeToString(getDeclaringClass(sourceProp) || source), typeToString(getDeclaringClass(targetProp) || target));
+                                    }
+                                    return 0 /* False */;
+                                }
                             }
-                            return;
-                        }
-                        if (resolved.constructSignatures.length === 1 && !resolved.callSignatures.length) {
-                            if (flags & 64 /* InElementType */) {
-                                writePunctuation(writer, 17 /* OpenParenToken */);
+                            else if (sourcePropFlags & 16 /* Protected */) {
+                                if (reportErrors) {
+                                    reportError(ts.Diagnostics.Property_0_is_protected_in_type_1_but_public_in_type_2, symbolToString(targetProp), typeToString(source), typeToString(target));
+                                }
+                                return 0 /* False */;
                             }
-                            writeKeyword(writer, 92 /* NewKeyword */);
-                            writeSpace(writer);
-                            buildSignatureDisplay(resolved.constructSignatures[0], writer, enclosingDeclaration, globalFlagsToPass | 8 /* WriteArrowStyleSignature */, /*kind*/ undefined, symbolStack);
-                            if (flags & 64 /* InElementType */) {
-                                writePunctuation(writer, 18 /* CloseParenToken */);
+                            var related = isRelatedTo(getTypeOfSymbol(sourceProp), getTypeOfSymbol(targetProp), reportErrors);
+                            if (!related) {
+                                if (reportErrors) {
+                                    reportError(ts.Diagnostics.Types_of_property_0_are_incompatible, symbolToString(targetProp));
+                                }
+                                return 0 /* False */;
                             }
-                            return;
-                        }
-                    }
-                    var saveInObjectTypeLiteral = inObjectTypeLiteral;
-                    inObjectTypeLiteral = true;
-                    writePunctuation(writer, 15 /* OpenBraceToken */);
-                    writer.writeLine();
-                    writer.increaseIndent();
-                    for (var _i = 0, _a = resolved.callSignatures; _i < _a.length; _i++) {
-                        var signature = _a[_i];
-                        buildSignatureDisplay(signature, writer, enclosingDeclaration, globalFlagsToPass, /*kind*/ undefined, symbolStack);
-                        writePunctuation(writer, 23 /* SemicolonToken */);
-                        writer.writeLine();
-                    }
-                    for (var _b = 0, _c = resolved.constructSignatures; _b < _c.length; _b++) {
-                        var signature = _c[_b];
-                        buildSignatureDisplay(signature, writer, enclosingDeclaration, globalFlagsToPass, 1 /* Construct */, symbolStack);
-                        writePunctuation(writer, 23 /* SemicolonToken */);
-                        writer.writeLine();
-                    }
-                    writeIndexSignature(resolved.stringIndexInfo, 132 /* StringKeyword */);
-                    writeIndexSignature(resolved.numberIndexInfo, 130 /* NumberKeyword */);
-                    for (var _d = 0, _e = resolved.properties; _d < _e.length; _d++) {
-                        var p = _e[_d];
-                        var t = getTypeOfSymbol(p);
-                        if (p.flags & (16 /* Function */ | 8192 /* Method */) && !getPropertiesOfObjectType(t).length) {
-                            var signatures = getSignaturesOfType(t, 0 /* Call */);
-                            for (var _f = 0, signatures_1 = signatures; _f < signatures_1.length; _f++) {
-                                var signature = signatures_1[_f];
-                                writePropertyWithModifiers(p);
-                                buildSignatureDisplay(signature, writer, enclosingDeclaration, globalFlagsToPass, /*kind*/ undefined, symbolStack);
-                                writePunctuation(writer, 23 /* SemicolonToken */);
-                                writer.writeLine();
+                            result &= related;
+                            // When checking for comparability, be more lenient with optional properties.
+                            if (relation !== comparableRelation && sourceProp.flags & 67108864 /* Optional */ && !(targetProp.flags & 67108864 /* Optional */)) {
+                                // TypeScript 1.0 spec (April 2014): 3.8.3
+                                // S is a subtype of a type T, and T is a supertype of S if ...
+                                // S' and T are object types and, for each member M in T..
+                                // M is a property and S' contains a property N where
+                                // if M is a required property, N is also a required property
+                                // (M - property in T)
+                                // (N - property in S)
+                                if (reportErrors) {
+                                    reportError(ts.Diagnostics.Property_0_is_optional_in_type_1_but_required_in_type_2, symbolToString(targetProp), typeToString(source), typeToString(target));
+                                }
+                                return 0 /* False */;
                             }
                         }
-                        else {
-                            writePropertyWithModifiers(p);
-                            writePunctuation(writer, 54 /* ColonToken */);
-                            writeSpace(writer);
-                            writeType(t, 0 /* None */);
-                            writePunctuation(writer, 23 /* SemicolonToken */);
-                            writer.writeLine();
-                        }
                     }
-                    writer.decreaseIndent();
-                    writePunctuation(writer, 16 /* CloseBraceToken */);
-                    inObjectTypeLiteral = saveInObjectTypeLiteral;
                 }
+                return result;
             }
-            function buildTypeParameterDisplayFromSymbol(symbol, writer, enclosingDeclaration, flags) {
-                var targetSymbol = getTargetSymbol(symbol);
-                if (targetSymbol.flags & 32 /* Class */ || targetSymbol.flags & 64 /* Interface */ || targetSymbol.flags & 524288 /* TypeAlias */) {
-                    buildDisplayForTypeParametersAndDelimiters(getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol), writer, enclosingDeclaration, flags);
+            /**
+             * A type is 'weak' if it is an object type with at least one optional property
+             * and no required properties, call/construct signatures or index signatures
+             */
+            function isWeakType(type) {
+                if (type.flags & 32768 /* Object */) {
+                    var resolved = resolveStructuredTypeMembers(type);
+                    return resolved.callSignatures.length === 0 && resolved.constructSignatures.length === 0 &&
+                        !resolved.stringIndexInfo && !resolved.numberIndexInfo &&
+                        resolved.properties.length > 0 &&
+                        ts.every(resolved.properties, function (p) { return !!(p.flags & 67108864 /* Optional */); });
                 }
-            }
-            function buildTypeParameterDisplay(tp, writer, enclosingDeclaration, flags, symbolStack) {
-                appendSymbolNameOnly(tp.symbol, writer);
-                var constraint = getConstraintOfTypeParameter(tp);
-                if (constraint) {
-                    writeSpace(writer);
-                    writeKeyword(writer, 83 /* ExtendsKeyword */);
-                    writeSpace(writer);
-                    buildTypeDisplay(constraint, writer, enclosingDeclaration, flags, symbolStack);
+                if (type.flags & 131072 /* Intersection */) {
+                    return ts.every(type.types, isWeakType);
                 }
+                return false;
             }
-            function buildParameterDisplay(p, writer, enclosingDeclaration, flags, symbolStack) {
-                var parameterNode = p.valueDeclaration;
-                if (ts.isRestParameter(parameterNode)) {
-                    writePunctuation(writer, 22 /* DotDotDotToken */);
+            function hasCommonProperties(source, target) {
+                var isComparingJsxAttributes = !!(source.flags & 33554432 /* JsxAttributes */);
+                for (var _i = 0, _a = getPropertiesOfType(source); _i < _a.length; _i++) {
+                    var prop = _a[_i];
+                    if (isKnownProperty(target, prop.name, isComparingJsxAttributes)) {
+                        return true;
+                    }
                 }
-                if (ts.isBindingPattern(parameterNode.name)) {
-                    buildBindingPatternDisplay(parameterNode.name, writer, enclosingDeclaration, flags, symbolStack);
+                return false;
+            }
+            function propertiesIdenticalTo(source, target) {
+                if (!(source.flags & 32768 /* Object */ && target.flags & 32768 /* Object */)) {
+                    return 0 /* False */;
                 }
-                else {
-                    appendSymbolNameOnly(p, writer);
+                var sourceProperties = getPropertiesOfObjectType(source);
+                var targetProperties = getPropertiesOfObjectType(target);
+                if (sourceProperties.length !== targetProperties.length) {
+                    return 0 /* False */;
                 }
-                if (isOptionalParameter(parameterNode)) {
-                    writePunctuation(writer, 53 /* QuestionToken */);
+                var result = -1 /* True */;
+                for (var _i = 0, sourceProperties_2 = sourceProperties; _i < sourceProperties_2.length; _i++) {
+                    var sourceProp = sourceProperties_2[_i];
+                    var targetProp = getPropertyOfObjectType(target, sourceProp.name);
+                    if (!targetProp) {
+                        return 0 /* False */;
+                    }
+                    var related = compareProperties(sourceProp, targetProp, isRelatedTo);
+                    if (!related) {
+                        return 0 /* False */;
+                    }
+                    result &= related;
                 }
-                writePunctuation(writer, 54 /* ColonToken */);
-                writeSpace(writer);
-                buildTypeDisplay(getTypeOfSymbol(p), writer, enclosingDeclaration, flags, symbolStack);
+                return result;
             }
-            function buildBindingPatternDisplay(bindingPattern, writer, enclosingDeclaration, flags, symbolStack) {
-                // We have to explicitly emit square bracket and bracket because these tokens are not stored inside the node.
-                if (bindingPattern.kind === 167 /* ObjectBindingPattern */) {
-                    writePunctuation(writer, 15 /* OpenBraceToken */);
-                    buildDisplayForCommaSeparatedList(bindingPattern.elements, writer, function (e) { return buildBindingElementDisplay(e, writer, enclosingDeclaration, flags, symbolStack); });
-                    writePunctuation(writer, 16 /* CloseBraceToken */);
+            function signaturesRelatedTo(source, target, kind, reportErrors) {
+                if (relation === identityRelation) {
+                    return signaturesIdenticalTo(source, target, kind);
                 }
-                else if (bindingPattern.kind === 168 /* ArrayBindingPattern */) {
-                    writePunctuation(writer, 19 /* OpenBracketToken */);
-                    var elements = bindingPattern.elements;
-                    buildDisplayForCommaSeparatedList(elements, writer, function (e) { return buildBindingElementDisplay(e, writer, enclosingDeclaration, flags, symbolStack); });
-                    if (elements && elements.hasTrailingComma) {
-                        writePunctuation(writer, 24 /* CommaToken */);
-                    }
-                    writePunctuation(writer, 20 /* CloseBracketToken */);
+                if (target === anyFunctionType || source === anyFunctionType) {
+                    return -1 /* True */;
                 }
-            }
-            function buildBindingElementDisplay(bindingElement, writer, enclosingDeclaration, flags, symbolStack) {
-                if (ts.isOmittedExpression(bindingElement)) {
-                    return;
+                var sourceSignatures = getSignaturesOfType(source, kind);
+                var targetSignatures = getSignaturesOfType(target, kind);
+                if (kind === 1 /* Construct */ && sourceSignatures.length && targetSignatures.length) {
+                    if (isAbstractConstructorType(source) && !isAbstractConstructorType(target)) {
+                        // An abstract constructor type is not assignable to a non-abstract constructor type
+                        // as it would otherwise be possible to new an abstract class. Note that the assignability
+                        // check we perform for an extends clause excludes construct signatures from the target,
+                        // so this check never proceeds.
+                        if (reportErrors) {
+                            reportError(ts.Diagnostics.Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type);
+                        }
+                        return 0 /* False */;
+                    }
+                    if (!constructorVisibilitiesAreCompatible(sourceSignatures[0], targetSignatures[0], reportErrors)) {
+                        return 0 /* False */;
+                    }
                 }
-                ts.Debug.assert(bindingElement.kind === 169 /* BindingElement */);
-                if (bindingElement.propertyName) {
-                    writer.writeSymbol(ts.getTextOfNode(bindingElement.propertyName), bindingElement.symbol);
-                    writePunctuation(writer, 54 /* ColonToken */);
-                    writeSpace(writer);
+                var result = -1 /* True */;
+                var saveErrorInfo = errorInfo;
+                if (getObjectFlags(source) & 64 /* Instantiated */ && getObjectFlags(target) & 64 /* Instantiated */ && source.symbol === target.symbol) {
+                    // We have instantiations of the same anonymous type (which typically will be the type of a
+                    // method). Simply do a pairwise comparison of the signatures in the two signature lists instead
+                    // of the much more expensive N * M comparison matrix we explore below. We erase type parameters
+                    // as they are known to always be the same.
+                    for (var i = 0; i < targetSignatures.length; i++) {
+                        var related = signatureRelatedTo(sourceSignatures[i], targetSignatures[i], /*erase*/ true, reportErrors);
+                        if (!related) {
+                            return 0 /* False */;
+                        }
+                        result &= related;
+                    }
                 }
-                if (ts.isBindingPattern(bindingElement.name)) {
-                    buildBindingPatternDisplay(bindingElement.name, writer, enclosingDeclaration, flags, symbolStack);
+                else if (sourceSignatures.length === 1 && targetSignatures.length === 1) {
+                    // For simple functions (functions with a single signature) we only erase type parameters for
+                    // the comparable relation. Otherwise, if the source signature is generic, we instantiate it
+                    // in the context of the target signature before checking the relationship. Ideally we'd do
+                    // this regardless of the number of signatures, but the potential costs are prohibitive due
+                    // to the quadratic nature of the logic below.
+                    var eraseGenerics = relation === comparableRelation || compilerOptions.noStrictGenericChecks;
+                    result = signatureRelatedTo(sourceSignatures[0], targetSignatures[0], eraseGenerics, reportErrors);
                 }
                 else {
-                    if (bindingElement.dotDotDotToken) {
-                        writePunctuation(writer, 22 /* DotDotDotToken */);
+                    outer: for (var _i = 0, targetSignatures_1 = targetSignatures; _i < targetSignatures_1.length; _i++) {
+                        var t = targetSignatures_1[_i];
+                        // Only elaborate errors from the first failure
+                        var shouldElaborateErrors = reportErrors;
+                        for (var _a = 0, sourceSignatures_1 = sourceSignatures; _a < sourceSignatures_1.length; _a++) {
+                            var s = sourceSignatures_1[_a];
+                            var related = signatureRelatedTo(s, t, /*erase*/ true, shouldElaborateErrors);
+                            if (related) {
+                                result &= related;
+                                errorInfo = saveErrorInfo;
+                                continue outer;
+                            }
+                            shouldElaborateErrors = false;
+                        }
+                        if (shouldElaborateErrors) {
+                            reportError(ts.Diagnostics.Type_0_provides_no_match_for_the_signature_1, typeToString(source), signatureToString(t, /*enclosingDeclaration*/ undefined, /*flags*/ undefined, kind));
+                        }
+                        return 0 /* False */;
                     }
-                    appendSymbolNameOnly(bindingElement.symbol, writer);
                 }
+                return result;
             }
-            function buildDisplayForTypeParametersAndDelimiters(typeParameters, writer, enclosingDeclaration, flags, symbolStack) {
-                if (typeParameters && typeParameters.length) {
-                    writePunctuation(writer, 25 /* LessThanToken */);
-                    buildDisplayForCommaSeparatedList(typeParameters, writer, function (p) { return buildTypeParameterDisplay(p, writer, enclosingDeclaration, flags, symbolStack); });
-                    writePunctuation(writer, 27 /* GreaterThanToken */);
-                }
+            /**
+             * See signatureAssignableTo, compareSignaturesIdentical
+             */
+            function signatureRelatedTo(source, target, erase, reportErrors) {
+                return compareSignaturesRelated(erase ? getErasedSignature(source) : source, erase ? getErasedSignature(target) : target, 
+                /*checkAsCallback*/ false, /*ignoreReturnTypes*/ false, reportErrors, reportError, isRelatedTo);
             }
-            function buildDisplayForCommaSeparatedList(list, writer, action) {
-                for (var i = 0; i < list.length; i++) {
-                    if (i > 0) {
-                        writePunctuation(writer, 24 /* CommaToken */);
-                        writeSpace(writer);
+            function signaturesIdenticalTo(source, target, kind) {
+                var sourceSignatures = getSignaturesOfType(source, kind);
+                var targetSignatures = getSignaturesOfType(target, kind);
+                if (sourceSignatures.length !== targetSignatures.length) {
+                    return 0 /* False */;
+                }
+                var result = -1 /* True */;
+                for (var i = 0; i < sourceSignatures.length; i++) {
+                    var related = compareSignaturesIdentical(sourceSignatures[i], targetSignatures[i], /*partialMatch*/ false, /*ignoreThisTypes*/ false, /*ignoreReturnTypes*/ false, isRelatedTo);
+                    if (!related) {
+                        return 0 /* False */;
                     }
-                    action(list[i]);
+                    result &= related;
                 }
+                return result;
             }
-            function buildDisplayForTypeArgumentsAndDelimiters(typeParameters, mapper, writer, enclosingDeclaration, flags, symbolStack) {
-                if (typeParameters && typeParameters.length) {
-                    writePunctuation(writer, 25 /* LessThanToken */);
-                    var flags_1 = 256 /* InFirstTypeArgument */;
-                    for (var i = 0; i < typeParameters.length; i++) {
-                        if (i > 0) {
-                            writePunctuation(writer, 24 /* CommaToken */);
-                            writeSpace(writer);
-                            flags_1 = 0 /* None */;
+            function eachPropertyRelatedTo(source, target, kind, reportErrors) {
+                var result = -1 /* True */;
+                for (var _i = 0, _a = getPropertiesOfObjectType(source); _i < _a.length; _i++) {
+                    var prop = _a[_i];
+                    if (kind === 0 /* String */ || isNumericLiteralName(prop.name)) {
+                        var related = isRelatedTo(getTypeOfSymbol(prop), target, reportErrors);
+                        if (!related) {
+                            if (reportErrors) {
+                                reportError(ts.Diagnostics.Property_0_is_incompatible_with_index_signature, symbolToString(prop));
+                            }
+                            return 0 /* False */;
                         }
-                        buildTypeDisplay(mapper(typeParameters[i]), writer, enclosingDeclaration, flags_1);
+                        result &= related;
                     }
-                    writePunctuation(writer, 27 /* GreaterThanToken */);
                 }
+                return result;
+            }
+            function indexInfoRelatedTo(sourceInfo, targetInfo, reportErrors) {
+                var related = isRelatedTo(sourceInfo.type, targetInfo.type, reportErrors);
+                if (!related && reportErrors) {
+                    reportError(ts.Diagnostics.Index_signatures_are_incompatible);
+                }
+                return related;
             }
-            function buildDisplayForParametersAndDelimiters(thisParameter, parameters, writer, enclosingDeclaration, flags, symbolStack) {
-                writePunctuation(writer, 17 /* OpenParenToken */);
-                if (thisParameter) {
-                    buildParameterDisplay(thisParameter, writer, enclosingDeclaration, flags, symbolStack);
+            function indexTypesRelatedTo(source, target, kind, sourceIsPrimitive, reportErrors) {
+                if (relation === identityRelation) {
+                    return indexTypesIdenticalTo(source, target, kind);
                 }
-                for (var i = 0; i < parameters.length; i++) {
-                    if (i > 0 || thisParameter) {
-                        writePunctuation(writer, 24 /* CommaToken */);
-                        writeSpace(writer);
+                var targetInfo = getIndexInfoOfType(target, kind);
+                if (!targetInfo || targetInfo.type.flags & 1 /* Any */ && !sourceIsPrimitive) {
+                    // Index signature of type any permits assignment from everything but primitives
+                    return -1 /* True */;
+                }
+                var sourceInfo = getIndexInfoOfType(source, kind) ||
+                    kind === 1 /* Number */ && getIndexInfoOfType(source, 0 /* String */);
+                if (sourceInfo) {
+                    return indexInfoRelatedTo(sourceInfo, targetInfo, reportErrors);
+                }
+                if (isObjectLiteralType(source)) {
+                    var related = -1 /* True */;
+                    if (kind === 0 /* String */) {
+                        var sourceNumberInfo = getIndexInfoOfType(source, 1 /* Number */);
+                        if (sourceNumberInfo) {
+                            related = indexInfoRelatedTo(sourceNumberInfo, targetInfo, reportErrors);
+                        }
                     }
-                    buildParameterDisplay(parameters[i], writer, enclosingDeclaration, flags, symbolStack);
+                    if (related) {
+                        related &= eachPropertyRelatedTo(source, targetInfo.type, kind, reportErrors);
+                    }
+                    return related;
+                }
+                if (reportErrors) {
+                    reportError(ts.Diagnostics.Index_signature_is_missing_in_type_0, typeToString(source));
                 }
-                writePunctuation(writer, 18 /* CloseParenToken */);
+                return 0 /* False */;
             }
-            function buildTypePredicateDisplay(predicate, writer, enclosingDeclaration, flags, symbolStack) {
-                if (ts.isIdentifierTypePredicate(predicate)) {
-                    writer.writeParameter(predicate.parameterName);
+            function indexTypesIdenticalTo(source, target, indexKind) {
+                var targetInfo = getIndexInfoOfType(target, indexKind);
+                var sourceInfo = getIndexInfoOfType(source, indexKind);
+                if (!sourceInfo && !targetInfo) {
+                    return -1 /* True */;
                 }
-                else {
-                    writeKeyword(writer, 97 /* ThisKeyword */);
+                if (sourceInfo && targetInfo && sourceInfo.isReadonly === targetInfo.isReadonly) {
+                    return isRelatedTo(sourceInfo.type, targetInfo.type);
                 }
-                writeSpace(writer);
-                writeKeyword(writer, 124 /* IsKeyword */);
-                writeSpace(writer);
-                buildTypeDisplay(predicate.type, writer, enclosingDeclaration, flags, symbolStack);
+                return 0 /* False */;
             }
-            function buildReturnTypeDisplay(signature, writer, enclosingDeclaration, flags, symbolStack) {
-                if (flags & 8 /* WriteArrowStyleSignature */) {
-                    writeSpace(writer);
-                    writePunctuation(writer, 34 /* EqualsGreaterThanToken */);
-                }
-                else {
-                    writePunctuation(writer, 54 /* ColonToken */);
+            function constructorVisibilitiesAreCompatible(sourceSignature, targetSignature, reportErrors) {
+                if (!sourceSignature.declaration || !targetSignature.declaration) {
+                    return true;
                 }
-                writeSpace(writer);
-                if (signature.typePredicate) {
-                    buildTypePredicateDisplay(signature.typePredicate, writer, enclosingDeclaration, flags, symbolStack);
+                var sourceAccessibility = ts.getModifierFlags(sourceSignature.declaration) & 24 /* NonPublicAccessibilityModifier */;
+                var targetAccessibility = ts.getModifierFlags(targetSignature.declaration) & 24 /* NonPublicAccessibilityModifier */;
+                // A public, protected and private signature is assignable to a private signature.
+                if (targetAccessibility === 8 /* Private */) {
+                    return true;
                 }
-                else {
-                    var returnType = getReturnTypeOfSignature(signature);
-                    buildTypeDisplay(returnType, writer, enclosingDeclaration, flags, symbolStack);
+                // A public and protected signature is assignable to a protected signature.
+                if (targetAccessibility === 16 /* Protected */ && sourceAccessibility !== 8 /* Private */) {
+                    return true;
                 }
-            }
-            function buildSignatureDisplay(signature, writer, enclosingDeclaration, flags, kind, symbolStack) {
-                if (kind === 1 /* Construct */) {
-                    writeKeyword(writer, 92 /* NewKeyword */);
-                    writeSpace(writer);
+                // Only a public signature is assignable to public signature.
+                if (targetAccessibility !== 16 /* Protected */ && !sourceAccessibility) {
+                    return true;
                 }
-                if (signature.target && (flags & 32 /* WriteTypeArgumentsOfSignature */)) {
-                    // Instantiated signature, write type arguments instead
-                    // This is achieved by passing in the mapper separately
-                    buildDisplayForTypeArgumentsAndDelimiters(signature.target.typeParameters, signature.mapper, writer, enclosingDeclaration);
+                if (reportErrors) {
+                    reportError(ts.Diagnostics.Cannot_assign_a_0_constructor_type_to_a_1_constructor_type, visibilityToString(sourceAccessibility), visibilityToString(targetAccessibility));
                 }
-                else {
-                    buildDisplayForTypeParametersAndDelimiters(signature.typeParameters, writer, enclosingDeclaration, flags, symbolStack);
+                return false;
+            }
+        }
+        // Invoke the callback for each underlying property symbol of the given symbol and return the first
+        // value that isn't undefined.
+        function forEachProperty(prop, callback) {
+            if (ts.getCheckFlags(prop) & 6 /* Synthetic */) {
+                for (var _i = 0, _a = prop.containingType.types; _i < _a.length; _i++) {
+                    var t = _a[_i];
+                    var p = getPropertyOfType(t, prop.name);
+                    var result = p && forEachProperty(p, callback);
+                    if (result) {
+                        return result;
+                    }
                 }
-                buildDisplayForParametersAndDelimiters(signature.thisParameter, signature.parameters, writer, enclosingDeclaration, flags, symbolStack);
-                buildReturnTypeDisplay(signature, writer, enclosingDeclaration, flags, symbolStack);
+                return undefined;
             }
-            return _displayBuilder || (_displayBuilder = {
-                buildSymbolDisplay: buildSymbolDisplay,
-                buildTypeDisplay: buildTypeDisplay,
-                buildTypeParameterDisplay: buildTypeParameterDisplay,
-                buildTypePredicateDisplay: buildTypePredicateDisplay,
-                buildParameterDisplay: buildParameterDisplay,
-                buildDisplayForParametersAndDelimiters: buildDisplayForParametersAndDelimiters,
-                buildDisplayForTypeParametersAndDelimiters: buildDisplayForTypeParametersAndDelimiters,
-                buildTypeParameterDisplayFromSymbol: buildTypeParameterDisplayFromSymbol,
-                buildSignatureDisplay: buildSignatureDisplay,
-                buildReturnTypeDisplay: buildReturnTypeDisplay
+            return callback(prop);
+        }
+        // Return the declaring class type of a property or undefined if property not declared in class
+        function getDeclaringClass(prop) {
+            return prop.parent && prop.parent.flags & 32 /* Class */ ? getDeclaredTypeOfSymbol(getParentOfSymbol(prop)) : undefined;
+        }
+        // Return true if some underlying source property is declared in a class that derives
+        // from the given base class.
+        function isPropertyInClassDerivedFrom(prop, baseClass) {
+            return forEachProperty(prop, function (sp) {
+                var sourceClass = getDeclaringClass(sp);
+                return sourceClass ? hasBaseType(sourceClass, baseClass) : false;
             });
         }
-        function isDeclarationVisible(node) {
-            if (node) {
-                var links = getNodeLinks(node);
-                if (links.isVisible === undefined) {
-                    links.isVisible = !!determineIfDeclarationIsVisible();
+        // Return true if source property is a valid override of protected parts of target property.
+        function isValidOverrideOf(sourceProp, targetProp) {
+            return !forEachProperty(targetProp, function (tp) { return ts.getDeclarationModifierFlagsFromSymbol(tp) & 16 /* Protected */ ?
+                !isPropertyInClassDerivedFrom(sourceProp, getDeclaringClass(tp)) : false; });
+        }
+        // Return true if the given class derives from each of the declaring classes of the protected
+        // constituents of the given property.
+        function isClassDerivedFromDeclaringClasses(checkClass, prop) {
+            return forEachProperty(prop, function (p) { return ts.getDeclarationModifierFlagsFromSymbol(p) & 16 /* Protected */ ?
+                !hasBaseType(checkClass, getDeclaringClass(p)) : false; }) ? undefined : checkClass;
+        }
+        // Return true if the given type is the constructor type for an abstract class
+        function isAbstractConstructorType(type) {
+            if (getObjectFlags(type) & 16 /* Anonymous */) {
+                var symbol = type.symbol;
+                if (symbol && symbol.flags & 32 /* Class */) {
+                    var declaration = getClassLikeDeclarationOfSymbol(symbol);
+                    if (declaration && ts.getModifierFlags(declaration) & 128 /* Abstract */) {
+                        return true;
+                    }
                 }
-                return links.isVisible;
             }
             return false;
-            function determineIfDeclarationIsVisible() {
-                switch (node.kind) {
-                    case 169 /* BindingElement */:
-                        return isDeclarationVisible(node.parent.parent);
-                    case 218 /* VariableDeclaration */:
-                        if (ts.isBindingPattern(node.name) &&
-                            !node.name.elements.length) {
-                            // If the binding pattern is empty, this variable declaration is not visible
-                            return false;
-                        }
-                    // Otherwise fall through
-                    case 225 /* ModuleDeclaration */:
-                    case 221 /* ClassDeclaration */:
-                    case 222 /* InterfaceDeclaration */:
-                    case 223 /* TypeAliasDeclaration */:
-                    case 220 /* FunctionDeclaration */:
-                    case 224 /* EnumDeclaration */:
-                    case 229 /* ImportEqualsDeclaration */:
-                        // external module augmentation is always visible
-                        if (ts.isExternalModuleAugmentation(node)) {
-                            return true;
-                        }
-                        var parent_10 = getDeclarationContainer(node);
-                        // If the node is not exported or it is not ambient module element (except import declaration)
-                        if (!(ts.getCombinedModifierFlags(node) & 1 /* Export */) &&
-                            !(node.kind !== 229 /* ImportEqualsDeclaration */ && parent_10.kind !== 256 /* SourceFile */ && ts.isInAmbientContext(parent_10))) {
-                            return isGlobalSourceFile(parent_10);
-                        }
-                        // Exported members/ambient module elements (exception import declaration) are visible if parent is visible
-                        return isDeclarationVisible(parent_10);
-                    case 145 /* PropertyDeclaration */:
-                    case 144 /* PropertySignature */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                        if (ts.getModifierFlags(node) & (8 /* Private */ | 16 /* Protected */)) {
-                            // Private/protected properties/methods are not visible
-                            return false;
+        }
+        // Return true if the given type is deeply nested. We consider this to be the case when structural type comparisons
+        // for 5 or more occurrences or instantiations of the type have been recorded on the given stack. It is possible,
+        // though highly unlikely, for this test to be true in a situation where a chain of instantiations is not infinitely
+        // expanding. Effectively, we will generate a false positive when two types are structurally equal to at least 5
+        // levels, but unequal at some level beyond that.
+        function isDeeplyNestedType(type, stack, depth) {
+            // We track all object types that have an associated symbol (representing the origin of the type)
+            if (depth >= 5 && type.flags & 32768 /* Object */) {
+                var symbol = type.symbol;
+                if (symbol) {
+                    var count = 0;
+                    for (var i = 0; i < depth; i++) {
+                        var t = stack[i];
+                        if (t.flags & 32768 /* Object */ && t.symbol === symbol) {
+                            count++;
+                            if (count >= 5)
+                                return true;
                         }
-                    // Public properties/methods are visible if its parents are visible, so const it fall into next case statement
-                    case 148 /* Constructor */:
-                    case 152 /* ConstructSignature */:
-                    case 151 /* CallSignature */:
-                    case 153 /* IndexSignature */:
-                    case 142 /* Parameter */:
-                    case 226 /* ModuleBlock */:
-                    case 156 /* FunctionType */:
-                    case 157 /* ConstructorType */:
-                    case 159 /* TypeLiteral */:
-                    case 155 /* TypeReference */:
-                    case 160 /* ArrayType */:
-                    case 161 /* TupleType */:
-                    case 162 /* UnionType */:
-                    case 163 /* IntersectionType */:
-                    case 164 /* ParenthesizedType */:
-                        return isDeclarationVisible(node.parent);
-                    // Default binding, import specifier and namespace import is visible
-                    // only on demand so by default it is not visible
-                    case 231 /* ImportClause */:
-                    case 232 /* NamespaceImport */:
-                    case 234 /* ImportSpecifier */:
-                        return false;
-                    // Type parameters are always visible
-                    case 141 /* TypeParameter */:
-                    // Source file and namespace export are always visible
-                    case 256 /* SourceFile */:
-                    case 228 /* NamespaceExportDeclaration */:
-                        return true;
-                    // Export assignments do not create name bindings outside the module
-                    case 235 /* ExportAssignment */:
-                        return false;
-                    default:
-                        return false;
+                    }
                 }
             }
+            return false;
         }
-        function collectLinkedAliases(node) {
-            var exportSymbol;
-            if (node.parent && node.parent.kind === 235 /* ExportAssignment */) {
-                exportSymbol = resolveName(node.parent, node.text, 107455 /* Value */ | 793064 /* Type */ | 1920 /* Namespace */ | 8388608 /* Alias */, ts.Diagnostics.Cannot_find_name_0, node);
+        function isPropertyIdenticalTo(sourceProp, targetProp) {
+            return compareProperties(sourceProp, targetProp, compareTypesIdentical) !== 0 /* False */;
+        }
+        function compareProperties(sourceProp, targetProp, compareTypes) {
+            // Two members are considered identical when
+            // - they are public properties with identical names, optionality, and types,
+            // - they are private or protected properties originating in the same declaration and having identical types
+            if (sourceProp === targetProp) {
+                return -1 /* True */;
             }
-            else if (node.parent.kind === 238 /* ExportSpecifier */) {
-                var exportSpecifier = node.parent;
-                exportSymbol = exportSpecifier.parent.parent.moduleSpecifier ?
-                    getExternalModuleMember(exportSpecifier.parent.parent, exportSpecifier) :
-                    resolveEntityName(exportSpecifier.propertyName || exportSpecifier.name, 107455 /* Value */ | 793064 /* Type */ | 1920 /* Namespace */ | 8388608 /* Alias */);
+            var sourcePropAccessibility = ts.getDeclarationModifierFlagsFromSymbol(sourceProp) & 24 /* NonPublicAccessibilityModifier */;
+            var targetPropAccessibility = ts.getDeclarationModifierFlagsFromSymbol(targetProp) & 24 /* NonPublicAccessibilityModifier */;
+            if (sourcePropAccessibility !== targetPropAccessibility) {
+                return 0 /* False */;
             }
-            var result = [];
-            if (exportSymbol) {
-                buildVisibleNodeList(exportSymbol.declarations);
+            if (sourcePropAccessibility) {
+                if (getTargetSymbol(sourceProp) !== getTargetSymbol(targetProp)) {
+                    return 0 /* False */;
+                }
             }
-            return result;
-            function buildVisibleNodeList(declarations) {
-                ts.forEach(declarations, function (declaration) {
-                    getNodeLinks(declaration).isVisible = true;
-                    var resultNode = getAnyImportSyntax(declaration) || declaration;
-                    if (!ts.contains(result, resultNode)) {
-                        result.push(resultNode);
-                    }
-                    if (ts.isInternalModuleImportEqualsDeclaration(declaration)) {
-                        // Add the referenced top container visible
-                        var internalModuleReference = declaration.moduleReference;
-                        var firstIdentifier = getFirstIdentifier(internalModuleReference);
-                        var importSymbol = resolveName(declaration, firstIdentifier.text, 107455 /* Value */ | 793064 /* Type */ | 1920 /* Namespace */, undefined, undefined);
-                        if (importSymbol) {
-                            buildVisibleNodeList(importSymbol.declarations);
-                        }
-                    }
-                });
+            else {
+                if ((sourceProp.flags & 67108864 /* Optional */) !== (targetProp.flags & 67108864 /* Optional */)) {
+                    return 0 /* False */;
+                }
+            }
+            if (isReadonlySymbol(sourceProp) !== isReadonlySymbol(targetProp)) {
+                return 0 /* False */;
+            }
+            return compareTypes(getTypeOfSymbol(sourceProp), getTypeOfSymbol(targetProp));
+        }
+        function isMatchingSignature(source, target, partialMatch) {
+            // A source signature matches a target signature if the two signatures have the same number of required,
+            // optional, and rest parameters.
+            if (source.parameters.length === target.parameters.length &&
+                source.minArgumentCount === target.minArgumentCount &&
+                source.hasRestParameter === target.hasRestParameter) {
+                return true;
+            }
+            // A source signature partially matches a target signature if the target signature has no fewer required
+            // parameters and no more overall parameters than the source signature (where a signature with a rest
+            // parameter is always considered to have more overall parameters than one without).
+            var sourceRestCount = source.hasRestParameter ? 1 : 0;
+            var targetRestCount = target.hasRestParameter ? 1 : 0;
+            if (partialMatch && source.minArgumentCount <= target.minArgumentCount && (sourceRestCount > targetRestCount ||
+                sourceRestCount === targetRestCount && source.parameters.length >= target.parameters.length)) {
+                return true;
             }
+            return false;
         }
         /**
-         * Push an entry on the type resolution stack. If an entry with the given target and the given property name
-         * is already on the stack, and no entries in between already have a type, then a circularity has occurred.
-         * In this case, the result values of the existing entry and all entries pushed after it are changed to false,
-         * and the value false is returned. Otherwise, the new entry is just pushed onto the stack, and true is returned.
-         * In order to see if the same query has already been done before, the target object and the propertyName both
-         * must match the one passed in.
-         *
-         * @param target The symbol, type, or signature whose type is being queried
-         * @param propertyName The property name that should be used to query the target for its type
+         * See signatureRelatedTo, compareSignaturesIdentical
          */
-        function pushTypeResolution(target, propertyName) {
-            var resolutionCycleStartIndex = findResolutionCycleStartIndex(target, propertyName);
-            if (resolutionCycleStartIndex >= 0) {
-                // A cycle was found
-                var length_2 = resolutionTargets.length;
-                for (var i = resolutionCycleStartIndex; i < length_2; i++) {
-                    resolutionResults[i] = false;
+        function compareSignaturesIdentical(source, target, partialMatch, ignoreThisTypes, ignoreReturnTypes, compareTypes) {
+            // TODO (drosen): De-duplicate code between related functions.
+            if (source === target) {
+                return -1 /* True */;
+            }
+            if (!(isMatchingSignature(source, target, partialMatch))) {
+                return 0 /* False */;
+            }
+            // Check that the two signatures have the same number of type parameters. We might consider
+            // also checking that any type parameter constraints match, but that would require instantiating
+            // the constraints with a common set of type arguments to get relatable entities in places where
+            // type parameters occur in the constraints. The complexity of doing that doesn't seem worthwhile,
+            // particularly as we're comparing erased versions of the signatures below.
+            if (ts.length(source.typeParameters) !== ts.length(target.typeParameters)) {
+                return 0 /* False */;
+            }
+            // Spec 1.0 Section 3.8.3 & 3.8.4:
+            // M and N (the signatures) are instantiated using type Any as the type argument for all type parameters declared by M and N
+            source = getErasedSignature(source);
+            target = getErasedSignature(target);
+            var result = -1 /* True */;
+            if (!ignoreThisTypes) {
+                var sourceThisType = getThisTypeOfSignature(source);
+                if (sourceThisType) {
+                    var targetThisType = getThisTypeOfSignature(target);
+                    if (targetThisType) {
+                        var related = compareTypes(sourceThisType, targetThisType);
+                        if (!related) {
+                            return 0 /* False */;
+                        }
+                        result &= related;
+                    }
                 }
-                return false;
             }
-            resolutionTargets.push(target);
-            resolutionResults.push(/*items*/ true);
-            resolutionPropertyNames.push(propertyName);
-            return true;
+            var targetLen = target.parameters.length;
+            for (var i = 0; i < targetLen; i++) {
+                var s = isRestParameterIndex(source, i) ? getRestTypeOfSignature(source) : getTypeOfParameter(source.parameters[i]);
+                var t = isRestParameterIndex(target, i) ? getRestTypeOfSignature(target) : getTypeOfParameter(target.parameters[i]);
+                var related = compareTypes(s, t);
+                if (!related) {
+                    return 0 /* False */;
+                }
+                result &= related;
+            }
+            if (!ignoreReturnTypes) {
+                result &= compareTypes(getReturnTypeOfSignature(source), getReturnTypeOfSignature(target));
+            }
+            return result;
         }
-        function findResolutionCycleStartIndex(target, propertyName) {
-            for (var i = resolutionTargets.length - 1; i >= 0; i--) {
-                if (hasType(resolutionTargets[i], resolutionPropertyNames[i])) {
-                    return -1;
+        function isRestParameterIndex(signature, parameterIndex) {
+            return signature.hasRestParameter && parameterIndex >= signature.parameters.length - 1;
+        }
+        function literalTypesWithSameBaseType(types) {
+            var commonBaseType;
+            for (var _i = 0, types_9 = types; _i < types_9.length; _i++) {
+                var t = types_9[_i];
+                var baseType = getBaseTypeOfLiteralType(t);
+                if (!commonBaseType) {
+                    commonBaseType = baseType;
                 }
-                if (resolutionTargets[i] === target && resolutionPropertyNames[i] === propertyName) {
-                    return i;
+                if (baseType === t || baseType !== commonBaseType) {
+                    return false;
                 }
             }
-            return -1;
+            return true;
         }
-        function hasType(target, propertyName) {
-            if (propertyName === 0 /* Type */) {
-                return getSymbolLinks(target).type;
-            }
-            if (propertyName === 2 /* DeclaredType */) {
-                return getSymbolLinks(target).declaredType;
-            }
-            if (propertyName === 1 /* ResolvedBaseConstructorType */) {
-                ts.Debug.assert(!!(target.flags & 32768 /* Class */));
-                return target.resolvedBaseConstructorType;
-            }
-            if (propertyName === 3 /* ResolvedReturnType */) {
-                return target.resolvedReturnType;
+        // When the candidate types are all literal types with the same base type, return a union
+        // of those literal types. Otherwise, return the leftmost type for which no type to the
+        // right is a supertype.
+        function getSupertypeOrUnion(types) {
+            return literalTypesWithSameBaseType(types) ?
+                getUnionType(types) :
+                ts.reduceLeft(types, function (s, t) { return isTypeSubtypeOf(s, t) ? t : s; });
+        }
+        function getCommonSupertype(types) {
+            if (!strictNullChecks) {
+                return getSupertypeOrUnion(types);
             }
-            ts.Debug.fail("Unhandled TypeSystemPropertyName " + propertyName);
+            var primaryTypes = ts.filter(types, function (t) { return !(t.flags & 6144 /* Nullable */); });
+            return primaryTypes.length ?
+                getNullableType(getSupertypeOrUnion(primaryTypes), getFalsyFlagsOfTypes(types) & 6144 /* Nullable */) :
+                getUnionType(types, /*subtypeReduction*/ true);
         }
-        // Pop an entry from the type resolution stack and return its associated result value. The result value will
-        // be true if no circularities were detected, or false if a circularity was found.
-        function popTypeResolution() {
-            resolutionTargets.pop();
-            resolutionPropertyNames.pop();
-            return resolutionResults.pop();
+        function isArrayType(type) {
+            return getObjectFlags(type) & 4 /* Reference */ && type.target === globalArrayType;
         }
-        function getDeclarationContainer(node) {
-            node = ts.getRootDeclaration(node);
-            while (node) {
-                switch (node.kind) {
-                    case 218 /* VariableDeclaration */:
-                    case 219 /* VariableDeclarationList */:
-                    case 234 /* ImportSpecifier */:
-                    case 233 /* NamedImports */:
-                    case 232 /* NamespaceImport */:
-                    case 231 /* ImportClause */:
-                        node = node.parent;
-                        break;
-                    default:
-                        return node.parent;
-                }
+        function isArrayLikeType(type) {
+            // A type is array-like if it is a reference to the global Array or global ReadonlyArray type,
+            // or if it is not the undefined or null type and if it is assignable to ReadonlyArray<any>
+            return getObjectFlags(type) & 4 /* Reference */ && (type.target === globalArrayType || type.target === globalReadonlyArrayType) ||
+                !(type.flags & 6144 /* Nullable */) && isTypeAssignableTo(type, anyReadonlyArrayType);
+        }
+        function isTupleLikeType(type) {
+            return !!getPropertyOfType(type, "0");
+        }
+        function isUnitType(type) {
+            return (type.flags & (224 /* Literal */ | 2048 /* Undefined */ | 4096 /* Null */)) !== 0;
+        }
+        function isLiteralType(type) {
+            return type.flags & 8 /* Boolean */ ? true :
+                type.flags & 65536 /* Union */ ? type.flags & 256 /* EnumLiteral */ ? true : !ts.forEach(type.types, function (t) { return !isUnitType(t); }) :
+                    isUnitType(type);
+        }
+        function getBaseTypeOfLiteralType(type) {
+            return type.flags & 256 /* EnumLiteral */ ? getBaseTypeOfEnumLiteralType(type) :
+                type.flags & 32 /* StringLiteral */ ? stringType :
+                    type.flags & 64 /* NumberLiteral */ ? numberType :
+                        type.flags & 128 /* BooleanLiteral */ ? booleanType :
+                            type.flags & 65536 /* Union */ ? getUnionType(ts.sameMap(type.types, getBaseTypeOfLiteralType)) :
+                                type;
+        }
+        function getWidenedLiteralType(type) {
+            return type.flags & 256 /* EnumLiteral */ ? getBaseTypeOfEnumLiteralType(type) :
+                type.flags & 32 /* StringLiteral */ && type.flags & 1048576 /* FreshLiteral */ ? stringType :
+                    type.flags & 64 /* NumberLiteral */ && type.flags & 1048576 /* FreshLiteral */ ? numberType :
+                        type.flags & 128 /* BooleanLiteral */ ? booleanType :
+                            type.flags & 65536 /* Union */ ? getUnionType(ts.sameMap(type.types, getWidenedLiteralType)) :
+                                type;
+        }
+        /**
+         * Check if a Type was written as a tuple type literal.
+         * Prefer using isTupleLikeType() unless the use of `elementTypes` is required.
+         */
+        function isTupleType(type) {
+            return !!(getObjectFlags(type) & 4 /* Reference */ && type.target.objectFlags & 8 /* Tuple */);
+        }
+        function getFalsyFlagsOfTypes(types) {
+            var result = 0;
+            for (var _i = 0, types_10 = types; _i < types_10.length; _i++) {
+                var t = types_10[_i];
+                result |= getFalsyFlags(t);
             }
+            return result;
         }
-        function getTypeOfPrototypeProperty(prototype) {
-            // TypeScript 1.0 spec (April 2014): 8.4
-            // Every class automatically contains a static property member named 'prototype',
-            // the type of which is an instantiation of the class type with type Any supplied as a type argument for each type parameter.
-            // It is an error to explicitly declare a static property member with the name 'prototype'.
-            var classType = getDeclaredTypeOfSymbol(getParentOfSymbol(prototype));
-            return classType.typeParameters ? createTypeReference(classType, ts.map(classType.typeParameters, function (_) { return anyType; })) : classType;
+        // Returns the String, Number, Boolean, StringLiteral, NumberLiteral, BooleanLiteral, Void, Undefined, or Null
+        // flags for the string, number, boolean, "", 0, false, void, undefined, or null types respectively. Returns
+        // no flags for all other types (including non-falsy literal types).
+        function getFalsyFlags(type) {
+            return type.flags & 65536 /* Union */ ? getFalsyFlagsOfTypes(type.types) :
+                type.flags & 32 /* StringLiteral */ ? type.value === "" ? 32 /* StringLiteral */ : 0 :
+                    type.flags & 64 /* NumberLiteral */ ? type.value === 0 ? 64 /* NumberLiteral */ : 0 :
+                        type.flags & 128 /* BooleanLiteral */ ? type === falseType ? 128 /* BooleanLiteral */ : 0 :
+                            type.flags & 7406 /* PossiblyFalsy */;
         }
-        // Return the type of the given property in the given type, or undefined if no such property exists
-        function getTypeOfPropertyOfType(type, name) {
-            var prop = getPropertyOfType(type, name);
-            return prop ? getTypeOfSymbol(prop) : undefined;
+        function removeDefinitelyFalsyTypes(type) {
+            return getFalsyFlags(type) & 7392 /* DefinitelyFalsy */ ?
+                filterType(type, function (t) { return !(getFalsyFlags(t) & 7392 /* DefinitelyFalsy */); }) :
+                type;
         }
-        function isTypeAny(type) {
-            return type && (type.flags & 1 /* Any */) !== 0;
+        function extractDefinitelyFalsyTypes(type) {
+            return mapType(type, getDefinitelyFalsyPartOfType);
+        }
+        function getDefinitelyFalsyPartOfType(type) {
+            return type.flags & 2 /* String */ ? emptyStringType :
+                type.flags & 4 /* Number */ ? zeroType :
+                    type.flags & 8 /* Boolean */ || type === falseType ? falseType :
+                        type.flags & (1024 /* Void */ | 2048 /* Undefined */ | 4096 /* Null */) ||
+                            type.flags & 32 /* StringLiteral */ && type.value === "" ||
+                            type.flags & 64 /* NumberLiteral */ && type.value === 0 ? type :
+                            neverType;
+        }
+        function getNullableType(type, flags) {
+            var missing = (flags & ~type.flags) & (2048 /* Undefined */ | 4096 /* Null */);
+            return missing === 0 ? type :
+                missing === 2048 /* Undefined */ ? getUnionType([type, undefinedType]) :
+                    missing === 4096 /* Null */ ? getUnionType([type, nullType]) :
+                        getUnionType([type, undefinedType, nullType]);
         }
-        function isTypeNever(type) {
-            return type && (type.flags & 8192 /* Never */) !== 0;
+        function getNonNullableType(type) {
+            return strictNullChecks ? getTypeWithFacts(type, 524288 /* NEUndefinedOrNull */) : type;
         }
-        // Return the type of a binding element parent. We check SymbolLinks first to see if a type has been
-        // assigned by contextual typing.
-        function getTypeForBindingElementParent(node) {
-            var symbol = getSymbolOfNode(node);
-            return symbol && getSymbolLinks(symbol).type || getTypeForVariableLikeDeclaration(node, /*includeOptionality*/ false);
+        /**
+         * Return true if type was inferred from an object literal or written as an object type literal
+         * with no call or construct signatures.
+         */
+        function isObjectLiteralType(type) {
+            return type.symbol && (type.symbol.flags & (4096 /* ObjectLiteral */ | 2048 /* TypeLiteral */)) !== 0 &&
+                getSignaturesOfType(type, 0 /* Call */).length === 0 &&
+                getSignaturesOfType(type, 1 /* Construct */).length === 0;
         }
-        function getTextOfPropertyName(name) {
-            switch (name.kind) {
-                case 69 /* Identifier */:
-                    return name.text;
-                case 9 /* StringLiteral */:
-                case 8 /* NumericLiteral */:
-                    return name.text;
-                case 140 /* ComputedPropertyName */:
-                    if (ts.isStringOrNumericLiteral(name.expression.kind)) {
-                        return name.expression.text;
-                    }
+        function createSymbolWithType(source, type) {
+            var symbol = createSymbol(source.flags, source.name);
+            symbol.declarations = source.declarations;
+            symbol.parent = source.parent;
+            symbol.type = type;
+            symbol.target = source;
+            if (source.valueDeclaration) {
+                symbol.valueDeclaration = source.valueDeclaration;
             }
-            return undefined;
+            return symbol;
         }
-        function isComputedNonLiteralName(name) {
-            return name.kind === 140 /* ComputedPropertyName */ && !ts.isStringOrNumericLiteral(name.expression.kind);
+        function transformTypeOfMembers(type, f) {
+            var members = ts.createMap();
+            for (var _i = 0, _a = getPropertiesOfObjectType(type); _i < _a.length; _i++) {
+                var property = _a[_i];
+                var original = getTypeOfSymbol(property);
+                var updated = f(original);
+                members.set(property.name, updated === original ? property : createSymbolWithType(property, updated));
+            }
+            return members;
         }
-        /** Return the inferred type for a binding element */
-        function getTypeForBindingElement(declaration) {
-            var pattern = declaration.parent;
-            var parentType = getTypeForBindingElementParent(pattern.parent);
-            // If parent has the unknown (error) type, then so does this binding element
-            if (parentType === unknownType) {
-                return unknownType;
+        /**
+         * If the the provided object literal is subject to the excess properties check,
+         * create a new that is exempt. Recursively mark object literal members as exempt.
+         * Leave signatures alone since they are not subject to the check.
+         */
+        function getRegularTypeOfObjectLiteral(type) {
+            if (!(getObjectFlags(type) & 128 /* ObjectLiteral */ && type.flags & 1048576 /* FreshLiteral */)) {
+                return type;
             }
-            // If no type was specified or inferred for parent, or if the specified or inferred type is any,
-            // infer from the initializer of the binding element if one is present. Otherwise, go with the
-            // undefined or any type of the parent.
-            if (!parentType || isTypeAny(parentType)) {
-                if (declaration.initializer) {
-                    return checkDeclarationInitializer(declaration);
-                }
-                return parentType;
+            var regularType = type.regularType;
+            if (regularType) {
+                return regularType;
             }
-            var type;
-            if (pattern.kind === 167 /* ObjectBindingPattern */) {
-                // Use explicitly specified property name ({ p: xxx } form), or otherwise the implied name ({ p } form)
-                var name_14 = declaration.propertyName || declaration.name;
-                if (isComputedNonLiteralName(name_14)) {
-                    // computed properties with non-literal names are treated as 'any'
+            var resolved = type;
+            var members = transformTypeOfMembers(type, getRegularTypeOfObjectLiteral);
+            var regularNew = createAnonymousType(resolved.symbol, members, resolved.callSignatures, resolved.constructSignatures, resolved.stringIndexInfo, resolved.numberIndexInfo);
+            regularNew.flags = resolved.flags & ~1048576 /* FreshLiteral */;
+            regularNew.objectFlags |= 128 /* ObjectLiteral */;
+            type.regularType = regularNew;
+            return regularNew;
+        }
+        function getWidenedProperty(prop) {
+            var original = getTypeOfSymbol(prop);
+            var widened = getWidenedType(original);
+            return widened === original ? prop : createSymbolWithType(prop, widened);
+        }
+        function getWidenedTypeOfObjectLiteral(type) {
+            var members = ts.createMap();
+            for (var _i = 0, _a = getPropertiesOfObjectType(type); _i < _a.length; _i++) {
+                var prop = _a[_i];
+                // Since get accessors already widen their return value there is no need to
+                // widen accessor based properties here.
+                members.set(prop.name, prop.flags & 4 /* Property */ ? getWidenedProperty(prop) : prop);
+            }
+            var stringIndexInfo = getIndexInfoOfType(type, 0 /* String */);
+            var numberIndexInfo = getIndexInfoOfType(type, 1 /* Number */);
+            return createAnonymousType(type.symbol, members, emptyArray, emptyArray, stringIndexInfo && createIndexInfo(getWidenedType(stringIndexInfo.type), stringIndexInfo.isReadonly), numberIndexInfo && createIndexInfo(getWidenedType(numberIndexInfo.type), numberIndexInfo.isReadonly));
+        }
+        function getWidenedConstituentType(type) {
+            return type.flags & 6144 /* Nullable */ ? type : getWidenedType(type);
+        }
+        function getWidenedType(type) {
+            if (type.flags & 6291456 /* RequiresWidening */) {
+                if (type.flags & 6144 /* Nullable */) {
                     return anyType;
                 }
-                if (declaration.initializer) {
-                    getContextualType(declaration.initializer);
-                }
-                // Use type of the specified property, or otherwise, for a numeric name, the type of the numeric index signature,
-                // or otherwise the type of the string index signature.
-                var text = getTextOfPropertyName(name_14);
-                type = getTypeOfPropertyOfType(parentType, text) ||
-                    isNumericLiteralName(text) && getIndexTypeOfType(parentType, 1 /* Number */) ||
-                    getIndexTypeOfType(parentType, 0 /* String */);
-                if (!type) {
-                    error(name_14, ts.Diagnostics.Type_0_has_no_property_1_and_no_string_index_signature, typeToString(parentType), ts.declarationNameToString(name_14));
-                    return unknownType;
+                if (getObjectFlags(type) & 128 /* ObjectLiteral */) {
+                    return getWidenedTypeOfObjectLiteral(type);
+                }
+                if (type.flags & 65536 /* Union */) {
+                    return getUnionType(ts.sameMap(type.types, getWidenedConstituentType));
+                }
+                if (isArrayType(type) || isTupleType(type)) {
+                    return createTypeReference(type.target, ts.sameMap(type.typeArguments, getWidenedType));
+                }
+            }
+            return type;
+        }
+        /**
+         * Reports implicit any errors that occur as a result of widening 'null' and 'undefined'
+         * to 'any'. A call to reportWideningErrorsInType is normally accompanied by a call to
+         * getWidenedType. But in some cases getWidenedType is called without reporting errors
+         * (type argument inference is an example).
+         *
+         * The return value indicates whether an error was in fact reported. The particular circumstances
+         * are on a best effort basis. Currently, if the null or undefined that causes widening is inside
+         * an object literal property (arbitrarily deeply), this function reports an error. If no error is
+         * reported, reportImplicitAnyError is a suitable fallback to report a general error.
+         */
+        function reportWideningErrorsInType(type) {
+            var errorReported = false;
+            if (type.flags & 65536 /* Union */) {
+                for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                    var t = _a[_i];
+                    if (reportWideningErrorsInType(t)) {
+                        errorReported = true;
+                    }
+                }
+            }
+            if (isArrayType(type) || isTupleType(type)) {
+                for (var _b = 0, _c = type.typeArguments; _b < _c.length; _b++) {
+                    var t = _c[_b];
+                    if (reportWideningErrorsInType(t)) {
+                        errorReported = true;
+                    }
                 }
             }
-            else {
-                // This elementType will be used if the specific property corresponding to this index is not
-                // present (aka the tuple element property). This call also checks that the parentType is in
-                // fact an iterable or array (depending on target language).
-                var elementType = checkIteratedTypeOrElementType(parentType, pattern, /*allowStringInput*/ false);
-                if (!declaration.dotDotDotToken) {
-                    // Use specific property type when parent is a tuple or numeric index type when parent is an array
-                    var propName = "" + ts.indexOf(pattern.elements, declaration);
-                    type = isTupleLikeType(parentType)
-                        ? getTypeOfPropertyOfType(parentType, propName)
-                        : elementType;
-                    if (!type) {
-                        if (isTupleType(parentType)) {
-                            error(declaration, ts.Diagnostics.Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2, typeToString(parentType), getTypeReferenceArity(parentType), pattern.elements.length);
-                        }
-                        else {
-                            error(declaration, ts.Diagnostics.Type_0_has_no_property_1, typeToString(parentType), propName);
+            if (getObjectFlags(type) & 128 /* ObjectLiteral */) {
+                for (var _d = 0, _e = getPropertiesOfObjectType(type); _d < _e.length; _d++) {
+                    var p = _e[_d];
+                    var t = getTypeOfSymbol(p);
+                    if (t.flags & 2097152 /* ContainsWideningType */) {
+                        if (!reportWideningErrorsInType(t)) {
+                            error(p.valueDeclaration, ts.Diagnostics.Object_literal_s_property_0_implicitly_has_an_1_type, p.name, typeToString(getWidenedType(t)));
                         }
-                        return unknownType;
+                        errorReported = true;
                     }
                 }
-                else {
-                    // Rest element has an array type with the same element type as the parent type
-                    type = createArrayType(elementType);
-                }
             }
-            // In strict null checking mode, if a default value of a non-undefined type is specified, remove
-            // undefined from the final type.
-            if (strictNullChecks && declaration.initializer && !(getFalsyFlags(checkExpressionCached(declaration.initializer)) & 2048 /* Undefined */)) {
-                type = getTypeWithFacts(type, 131072 /* NEUndefined */);
-            }
-            return declaration.initializer ?
-                getUnionType([type, checkExpressionCached(declaration.initializer)], /*subtypeReduction*/ true) :
-                type;
+            return errorReported;
         }
-        function getTypeForVariableLikeDeclarationFromJSDocComment(declaration) {
-            var jsDocType = getJSDocTypeForVariableLikeDeclarationFromJSDocComment(declaration);
-            if (jsDocType) {
-                return getTypeFromTypeNode(jsDocType);
+        function reportImplicitAnyError(declaration, type) {
+            var typeAsString = typeToString(getWidenedType(type));
+            var diagnostic;
+            switch (declaration.kind) {
+                case 149 /* PropertyDeclaration */:
+                case 148 /* PropertySignature */:
+                    diagnostic = ts.Diagnostics.Member_0_implicitly_has_an_1_type;
+                    break;
+                case 146 /* Parameter */:
+                    diagnostic = declaration.dotDotDotToken ?
+                        ts.Diagnostics.Rest_parameter_0_implicitly_has_an_any_type :
+                        ts.Diagnostics.Parameter_0_implicitly_has_an_1_type;
+                    break;
+                case 176 /* BindingElement */:
+                    diagnostic = ts.Diagnostics.Binding_element_0_implicitly_has_an_1_type;
+                    break;
+                case 228 /* FunctionDeclaration */:
+                case 151 /* MethodDeclaration */:
+                case 150 /* MethodSignature */:
+                case 153 /* GetAccessor */:
+                case 154 /* SetAccessor */:
+                case 186 /* FunctionExpression */:
+                case 187 /* ArrowFunction */:
+                    if (!declaration.name) {
+                        error(declaration, ts.Diagnostics.Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type, typeAsString);
+                        return;
+                    }
+                    diagnostic = ts.Diagnostics._0_which_lacks_return_type_annotation_implicitly_has_an_1_return_type;
+                    break;
+                default:
+                    diagnostic = ts.Diagnostics.Variable_0_implicitly_has_an_1_type;
             }
+            error(declaration, diagnostic, ts.declarationNameToString(ts.getNameOfDeclaration(declaration)), typeAsString);
         }
-        function getJSDocTypeForVariableLikeDeclarationFromJSDocComment(declaration) {
-            // First, see if this node has an @type annotation on it directly.
-            var typeTag = ts.getJSDocTypeTag(declaration);
-            if (typeTag && typeTag.typeExpression) {
-                return typeTag.typeExpression.type;
-            }
-            if (declaration.kind === 218 /* VariableDeclaration */ &&
-                declaration.parent.kind === 219 /* VariableDeclarationList */ &&
-                declaration.parent.parent.kind === 200 /* VariableStatement */) {
-                // @type annotation might have been on the variable statement, try that instead.
-                var annotation = ts.getJSDocTypeTag(declaration.parent.parent);
-                if (annotation && annotation.typeExpression) {
-                    return annotation.typeExpression.type;
-                }
-            }
-            else if (declaration.kind === 142 /* Parameter */) {
-                // If it's a parameter, see if the parent has a jsdoc comment with an @param
-                // annotation.
-                var paramTag = ts.getCorrespondingJSDocParameterTag(declaration);
-                if (paramTag && paramTag.typeExpression) {
-                    return paramTag.typeExpression.type;
+        function reportErrorsFromWidening(declaration, type) {
+            if (produceDiagnostics && noImplicitAny && type.flags & 2097152 /* ContainsWideningType */) {
+                // Report implicit any error within type if possible, otherwise report error on declaration
+                if (!reportWideningErrorsInType(type)) {
+                    reportImplicitAnyError(declaration, type);
                 }
             }
-            return undefined;
-        }
-        function addOptionality(type, optional) {
-            return strictNullChecks && optional ? includeFalsyTypes(type, 2048 /* Undefined */) : type;
         }
-        // Return the inferred type for a variable, parameter, or property declaration
-        function getTypeForVariableLikeDeclaration(declaration, includeOptionality) {
-            if (declaration.flags & 1048576 /* JavaScriptFile */) {
-                // If this is a variable in a JavaScript file, then use the JSDoc type (if it has
-                // one as its type), otherwise fallback to the below standard TS codepaths to
-                // try to figure it out.
-                var type = getTypeForVariableLikeDeclarationFromJSDocComment(declaration);
-                if (type && type !== unknownType) {
-                    return type;
-                }
+        function forEachMatchingParameterType(source, target, callback) {
+            var sourceMax = source.parameters.length;
+            var targetMax = target.parameters.length;
+            var count;
+            if (source.hasRestParameter && target.hasRestParameter) {
+                count = Math.max(sourceMax, targetMax);
             }
-            // A variable declared in a for..in statement is always of type string
-            if (declaration.parent.parent.kind === 207 /* ForInStatement */) {
-                return stringType;
+            else if (source.hasRestParameter) {
+                count = targetMax;
             }
-            if (declaration.parent.parent.kind === 208 /* ForOfStatement */) {
-                // checkRightHandSideOfForOf will return undefined if the for-of expression type was
-                // missing properties/signatures required to get its iteratedType (like
-                // [Symbol.iterator] or next). This may be because we accessed properties from anyType,
-                // or it may have led to an error inside getElementTypeOfIterable.
-                return checkRightHandSideOfForOf(declaration.parent.parent.expression) || anyType;
+            else if (target.hasRestParameter) {
+                count = sourceMax;
             }
-            if (ts.isBindingPattern(declaration.parent)) {
-                return getTypeForBindingElement(declaration);
+            else {
+                count = Math.min(sourceMax, targetMax);
             }
-            // Use type from type annotation if one is present
-            if (declaration.type) {
-                return addOptionality(getTypeFromTypeNode(declaration.type), /*optional*/ declaration.questionToken && includeOptionality);
+            for (var i = 0; i < count; i++) {
+                callback(getTypeAtPosition(source, i), getTypeAtPosition(target, i));
             }
-            if (declaration.kind === 142 /* Parameter */) {
-                var func = declaration.parent;
-                // For a parameter of a set accessor, use the type of the get accessor if one is present
-                if (func.kind === 150 /* SetAccessor */ && !ts.hasDynamicName(func)) {
-                    var getter = ts.getDeclarationOfKind(declaration.parent.symbol, 149 /* GetAccessor */);
-                    if (getter) {
-                        var getterSignature = getSignatureFromDeclaration(getter);
-                        var thisParameter = getAccessorThisParameter(func);
-                        if (thisParameter && declaration === thisParameter) {
-                            // Use the type from the *getter*
-                            ts.Debug.assert(!thisParameter.type);
-                            return getTypeOfSymbol(getterSignature.thisParameter);
-                        }
-                        return getReturnTypeOfSignature(getterSignature);
+        }
+        function createInferenceContext(signature, flags, baseInferences) {
+            var inferences = baseInferences ? ts.map(baseInferences, cloneInferenceInfo) : ts.map(signature.typeParameters, createInferenceInfo);
+            var context = mapper;
+            context.mappedTypes = signature.typeParameters;
+            context.signature = signature;
+            context.inferences = inferences;
+            context.flags = flags;
+            return context;
+            function mapper(t) {
+                for (var i = 0; i < inferences.length; i++) {
+                    if (t === inferences[i].typeParameter) {
+                        inferences[i].isFixed = true;
+                        return getInferredType(context, i);
                     }
                 }
-                // Use contextual parameter type if one is available
-                var type = void 0;
-                if (declaration.symbol.name === "this") {
-                    var thisParameter = getContextualThisParameter(func);
-                    type = thisParameter ? getTypeOfSymbol(thisParameter) : undefined;
-                }
-                else {
-                    type = getContextuallyTypedParameterType(declaration);
-                }
-                if (type) {
-                    return addOptionality(type, /*optional*/ declaration.questionToken && includeOptionality);
-                }
-            }
-            // Use the type of the initializer expression if one is present
-            if (declaration.initializer) {
-                var type = checkDeclarationInitializer(declaration);
-                return addOptionality(type, /*optional*/ declaration.questionToken && includeOptionality);
-            }
-            // If it is a short-hand property assignment, use the type of the identifier
-            if (declaration.kind === 254 /* ShorthandPropertyAssignment */) {
-                return checkIdentifier(declaration.name);
-            }
-            // If the declaration specifies a binding pattern, use the type implied by the binding pattern
-            if (ts.isBindingPattern(declaration.name)) {
-                return getTypeFromBindingPattern(declaration.name, /*includePatternInType*/ false, /*reportErrors*/ true);
+                return t;
             }
-            // No type specified and nothing can be inferred
-            return undefined;
         }
-        // Return the type implied by a binding pattern element. This is the type of the initializer of the element if
-        // one is present. Otherwise, if the element is itself a binding pattern, it is the type implied by the binding
-        // pattern. Otherwise, it is the type any.
-        function getTypeFromBindingElement(element, includePatternInType, reportErrors) {
-            if (element.initializer) {
-                return checkDeclarationInitializer(element);
-            }
-            if (ts.isBindingPattern(element.name)) {
-                return getTypeFromBindingPattern(element.name, includePatternInType, reportErrors);
-            }
-            if (reportErrors && compilerOptions.noImplicitAny && !declarationBelongsToPrivateAmbientMember(element)) {
-                reportImplicitAnyError(element, anyType);
-            }
-            return anyType;
+        function createInferenceInfo(typeParameter) {
+            return {
+                typeParameter: typeParameter,
+                candidates: undefined,
+                inferredType: undefined,
+                priority: undefined,
+                topLevel: true,
+                isFixed: false
+            };
         }
-        // Return the type implied by an object binding pattern
-        function getTypeFromObjectBindingPattern(pattern, includePatternInType, reportErrors) {
-            var members = ts.createMap();
-            var hasComputedProperties = false;
-            ts.forEach(pattern.elements, function (e) {
-                var name = e.propertyName || e.name;
-                if (isComputedNonLiteralName(name)) {
-                    // do not include computed properties in the implied type
-                    hasComputedProperties = true;
-                    return;
-                }
-                var text = getTextOfPropertyName(name);
-                var flags = 4 /* Property */ | 67108864 /* Transient */ | (e.initializer ? 536870912 /* Optional */ : 0);
-                var symbol = createSymbol(flags, text);
-                symbol.type = getTypeFromBindingElement(e, includePatternInType, reportErrors);
-                symbol.bindingElement = e;
-                members[symbol.name] = symbol;
-            });
-            var result = createAnonymousType(undefined, members, emptyArray, emptyArray, undefined, undefined);
-            if (includePatternInType) {
-                result.pattern = pattern;
-            }
-            if (hasComputedProperties) {
-                result.flags |= 536870912 /* ObjectLiteralPatternWithComputedProperties */;
-            }
-            return result;
+        function cloneInferenceInfo(inference) {
+            return {
+                typeParameter: inference.typeParameter,
+                candidates: inference.candidates && inference.candidates.slice(),
+                inferredType: inference.inferredType,
+                priority: inference.priority,
+                topLevel: inference.topLevel,
+                isFixed: inference.isFixed
+            };
         }
-        // Return the type implied by an array binding pattern
-        function getTypeFromArrayBindingPattern(pattern, includePatternInType, reportErrors) {
-            var elements = pattern.elements;
-            var lastElement = ts.lastOrUndefined(elements);
-            if (elements.length === 0 || (!ts.isOmittedExpression(lastElement) && lastElement.dotDotDotToken)) {
-                return languageVersion >= 2 /* ES6 */ ? createIterableType(anyType) : anyArrayType;
-            }
-            // If the pattern has at least one element, and no rest element, then it should imply a tuple type.
-            var elementTypes = ts.map(elements, function (e) { return ts.isOmittedExpression(e) ? anyType : getTypeFromBindingElement(e, includePatternInType, reportErrors); });
-            var result = createTupleType(elementTypes);
-            if (includePatternInType) {
-                result = cloneTypeReference(result);
-                result.pattern = pattern;
-            }
-            return result;
+        // Return true if the given type could possibly reference a type parameter for which
+        // we perform type inference (i.e. a type parameter of a generic function). We cache
+        // results for union and intersection types for performance reasons.
+        function couldContainTypeVariables(type) {
+            var objectFlags = getObjectFlags(type);
+            return !!(type.flags & 540672 /* TypeVariable */ ||
+                objectFlags & 4 /* Reference */ && ts.forEach(type.typeArguments, couldContainTypeVariables) ||
+                objectFlags & 16 /* Anonymous */ && type.symbol && type.symbol.flags & (16 /* Function */ | 8192 /* Method */ | 2048 /* TypeLiteral */ | 32 /* Class */) ||
+                objectFlags & 32 /* Mapped */ ||
+                type.flags & 196608 /* UnionOrIntersection */ && couldUnionOrIntersectionContainTypeVariables(type));
         }
-        // Return the type implied by a binding pattern. This is the type implied purely by the binding pattern itself
-        // and without regard to its context (i.e. without regard any type annotation or initializer associated with the
-        // declaration in which the binding pattern is contained). For example, the implied type of [x, y] is [any, any]
-        // and the implied type of { x, y: z = 1 } is { x: any; y: number; }. The type implied by a binding pattern is
-        // used as the contextual type of an initializer associated with the binding pattern. Also, for a destructuring
-        // parameter with no type annotation or initializer, the type implied by the binding pattern becomes the type of
-        // the parameter.
-        function getTypeFromBindingPattern(pattern, includePatternInType, reportErrors) {
-            return pattern.kind === 167 /* ObjectBindingPattern */
-                ? getTypeFromObjectBindingPattern(pattern, includePatternInType, reportErrors)
-                : getTypeFromArrayBindingPattern(pattern, includePatternInType, reportErrors);
+        function couldUnionOrIntersectionContainTypeVariables(type) {
+            if (type.couldContainTypeVariables === undefined) {
+                type.couldContainTypeVariables = ts.forEach(type.types, couldContainTypeVariables);
+            }
+            return type.couldContainTypeVariables;
         }
-        // Return the type associated with a variable, parameter, or property declaration. In the simple case this is the type
-        // specified in a type annotation or inferred from an initializer. However, in the case of a destructuring declaration it
-        // is a bit more involved. For example:
-        //
-        //   var [x, s = ""] = [1, "one"];
-        //
-        // Here, the array literal [1, "one"] is contextually typed by the type [any, string], which is the implied type of the
-        // binding pattern [x, s = ""]. Because the contextual type is a tuple type, the resulting type of [1, "one"] is the
-        // tuple type [number, string]. Thus, the type inferred for 'x' is number and the type inferred for 's' is string.
-        function getWidenedTypeForVariableLikeDeclaration(declaration, reportErrors) {
-            var type = getTypeForVariableLikeDeclaration(declaration, /*includeOptionality*/ true);
-            if (type) {
-                if (reportErrors) {
-                    reportErrorsFromWidening(declaration, type);
-                }
-                // During a normal type check we'll never get to here with a property assignment (the check of the containing
-                // object literal uses a different path). We exclude widening only so that language services and type verification
-                // tools see the actual type.
-                if (declaration.kind === 253 /* PropertyAssignment */) {
-                    return type;
+        function isTypeParameterAtTopLevel(type, typeParameter) {
+            return type === typeParameter || type.flags & 196608 /* UnionOrIntersection */ && ts.forEach(type.types, function (t) { return isTypeParameterAtTopLevel(t, typeParameter); });
+        }
+        // Infer a suitable input type for a homomorphic mapped type { [P in keyof T]: X }. We construct
+        // an object type with the same set of properties as the source type, where the type of each
+        // property is computed by inferring from the source property type to X for the type
+        // variable T[P] (i.e. we treat the type T[P] as the type variable we're inferring for).
+        function inferTypeForHomomorphicMappedType(source, target) {
+            var properties = getPropertiesOfType(source);
+            var indexInfo = getIndexInfoOfType(source, 0 /* String */);
+            if (properties.length === 0 && !indexInfo) {
+                return undefined;
+            }
+            var typeParameter = getIndexedAccessType(getConstraintTypeFromMappedType(target).type, getTypeParameterFromMappedType(target));
+            var inference = createInferenceInfo(typeParameter);
+            var inferences = [inference];
+            var templateType = getTemplateTypeFromMappedType(target);
+            var readonlyMask = target.declaration.readonlyToken ? false : true;
+            var optionalMask = target.declaration.questionToken ? 0 : 67108864 /* Optional */;
+            var members = ts.createMap();
+            for (var _i = 0, properties_4 = properties; _i < properties_4.length; _i++) {
+                var prop = properties_4[_i];
+                var inferredPropType = inferTargetType(getTypeOfSymbol(prop));
+                if (!inferredPropType) {
+                    return undefined;
                 }
-                return getWidenedType(type);
+                var inferredProp = createSymbol(4 /* Property */ | prop.flags & optionalMask, prop.name);
+                inferredProp.checkFlags = readonlyMask && isReadonlySymbol(prop) ? 8 /* Readonly */ : 0;
+                inferredProp.declarations = prop.declarations;
+                inferredProp.type = inferredPropType;
+                members.set(prop.name, inferredProp);
             }
-            // Rest parameters default to type any[], other parameters default to type any
-            type = declaration.dotDotDotToken ? anyArrayType : anyType;
-            // Report implicit any errors unless this is a private property within an ambient declaration
-            if (reportErrors && compilerOptions.noImplicitAny) {
-                if (!declarationBelongsToPrivateAmbientMember(declaration)) {
-                    reportImplicitAnyError(declaration, type);
+            if (indexInfo) {
+                var inferredIndexType = inferTargetType(indexInfo.type);
+                if (!inferredIndexType) {
+                    return undefined;
                 }
+                indexInfo = createIndexInfo(inferredIndexType, readonlyMask && indexInfo.isReadonly);
+            }
+            return createAnonymousType(undefined, members, emptyArray, emptyArray, indexInfo, undefined);
+            function inferTargetType(sourceType) {
+                inference.candidates = undefined;
+                inferTypes(inferences, sourceType, templateType);
+                return inference.candidates && getUnionType(inference.candidates, /*subtypeReduction*/ true);
             }
-            return type;
-        }
-        function declarationBelongsToPrivateAmbientMember(declaration) {
-            var root = ts.getRootDeclaration(declaration);
-            var memberDeclaration = root.kind === 142 /* Parameter */ ? root.parent : root;
-            return isPrivateWithinAmbient(memberDeclaration);
         }
-        function getTypeOfVariableOrParameterOrProperty(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.type) {
-                // Handle prototype property
-                if (symbol.flags & 134217728 /* Prototype */) {
-                    return links.type = getTypeOfPrototypeProperty(symbol);
+        function inferTypes(inferences, originalSource, originalTarget, priority) {
+            if (priority === void 0) { priority = 0; }
+            var symbolStack;
+            var visited;
+            inferFromTypes(originalSource, originalTarget);
+            function inferFromTypes(source, target) {
+                if (!couldContainTypeVariables(target)) {
+                    return;
                 }
-                // Handle catch clause variables
-                var declaration = symbol.valueDeclaration;
-                if (declaration.parent.kind === 252 /* CatchClause */) {
-                    return links.type = anyType;
+                if (source.aliasSymbol && source.aliasTypeArguments && source.aliasSymbol === target.aliasSymbol) {
+                    // Source and target are types originating in the same generic type alias declaration.
+                    // Simply infer from source type arguments to target type arguments.
+                    var sourceTypes = source.aliasTypeArguments;
+                    var targetTypes = target.aliasTypeArguments;
+                    for (var i = 0; i < sourceTypes.length; i++) {
+                        inferFromTypes(sourceTypes[i], targetTypes[i]);
+                    }
+                    return;
                 }
-                // Handle export default expressions
-                if (declaration.kind === 235 /* ExportAssignment */) {
-                    return links.type = checkExpression(declaration.expression);
+                if (source.flags & 65536 /* Union */ && target.flags & 65536 /* Union */ && !(source.flags & 256 /* EnumLiteral */ && target.flags & 256 /* EnumLiteral */) ||
+                    source.flags & 131072 /* Intersection */ && target.flags & 131072 /* Intersection */) {
+                    // Source and target are both unions or both intersections. If source and target
+                    // are the same type, just relate each constituent type to itself.
+                    if (source === target) {
+                        for (var _i = 0, _a = source.types; _i < _a.length; _i++) {
+                            var t = _a[_i];
+                            inferFromTypes(t, t);
+                        }
+                        return;
+                    }
+                    // Find each source constituent type that has an identically matching target constituent
+                    // type, and for each such type infer from the type to itself. When inferring from a
+                    // type to itself we effectively find all type parameter occurrences within that type
+                    // and infer themselves as their type arguments. We have special handling for numeric
+                    // and string literals because the number and string types are not represented as unions
+                    // of all their possible values.
+                    var matchingTypes = void 0;
+                    for (var _b = 0, _c = source.types; _b < _c.length; _b++) {
+                        var t = _c[_b];
+                        if (typeIdenticalToSomeType(t, target.types)) {
+                            (matchingTypes || (matchingTypes = [])).push(t);
+                            inferFromTypes(t, t);
+                        }
+                        else if (t.flags & (64 /* NumberLiteral */ | 32 /* StringLiteral */)) {
+                            var b = getBaseTypeOfLiteralType(t);
+                            if (typeIdenticalToSomeType(b, target.types)) {
+                                (matchingTypes || (matchingTypes = [])).push(t, b);
+                            }
+                        }
+                    }
+                    // Next, to improve the quality of inferences, reduce the source and target types by
+                    // removing the identically matched constituents. For example, when inferring from
+                    // 'string | string[]' to 'string | T' we reduce the types to 'string[]' and 'T'.
+                    if (matchingTypes) {
+                        source = removeTypesFromUnionOrIntersection(source, matchingTypes);
+                        target = removeTypesFromUnionOrIntersection(target, matchingTypes);
+                    }
                 }
-                if (declaration.flags & 1048576 /* JavaScriptFile */ && declaration.kind === 280 /* JSDocPropertyTag */ && declaration.typeExpression) {
-                    return links.type = getTypeFromTypeNode(declaration.typeExpression.type);
+                if (target.flags & 540672 /* TypeVariable */) {
+                    // If target is a type parameter, make an inference, unless the source type contains
+                    // the anyFunctionType (the wildcard type that's used to avoid contextually typing functions).
+                    // Because the anyFunctionType is internal, it should not be exposed to the user by adding
+                    // it as an inference candidate. Hopefully, a better candidate will come along that does
+                    // not contain anyFunctionType when we come back to this argument for its second round
+                    // of inference. Also, we exclude inferences for silentNeverType which is used as a wildcard
+                    // when constructing types from type parameters that had no inference candidates.
+                    if (source.flags & 8388608 /* ContainsAnyFunctionType */ || source === silentNeverType) {
+                        return;
+                    }
+                    var inference = getInferenceInfoForType(target);
+                    if (inference) {
+                        if (!inference.isFixed) {
+                            if (!inference.candidates || priority < inference.priority) {
+                                inference.candidates = [source];
+                                inference.priority = priority;
+                            }
+                            else if (priority === inference.priority) {
+                                inference.candidates.push(source);
+                            }
+                            if (!(priority & 4 /* ReturnType */) && target.flags & 16384 /* TypeParameter */ && !isTypeParameterAtTopLevel(originalTarget, target)) {
+                                inference.topLevel = false;
+                            }
+                        }
+                        return;
+                    }
                 }
-                // Handle variable, parameter or property
-                if (!pushTypeResolution(symbol, 0 /* Type */)) {
-                    return unknownType;
+                else if (getObjectFlags(source) & 4 /* Reference */ && getObjectFlags(target) & 4 /* Reference */ && source.target === target.target) {
+                    // If source and target are references to the same generic type, infer from type arguments
+                    var sourceTypes = source.typeArguments || emptyArray;
+                    var targetTypes = target.typeArguments || emptyArray;
+                    var count = sourceTypes.length < targetTypes.length ? sourceTypes.length : targetTypes.length;
+                    for (var i = 0; i < count; i++) {
+                        inferFromTypes(sourceTypes[i], targetTypes[i]);
+                    }
                 }
-                var type = void 0;
-                // Handle certain special assignment kinds, which happen to union across multiple declarations:
-                // * module.exports = expr
-                // * exports.p = expr
-                // * this.p = expr
-                // * className.prototype.method = expr
-                if (declaration.kind === 187 /* BinaryExpression */ ||
-                    declaration.kind === 172 /* PropertyAccessExpression */ && declaration.parent.kind === 187 /* BinaryExpression */) {
-                    // Use JS Doc type if present on parent expression statement
-                    if (declaration.flags & 1048576 /* JavaScriptFile */) {
-                        var typeTag = ts.getJSDocTypeTag(declaration.parent);
-                        if (typeTag && typeTag.typeExpression) {
-                            return links.type = getTypeFromTypeNode(typeTag.typeExpression.type);
+                else if (target.flags & 196608 /* UnionOrIntersection */) {
+                    var targetTypes = target.types;
+                    var typeVariableCount = 0;
+                    var typeVariable = void 0;
+                    // First infer to each type in union or intersection that isn't a type variable
+                    for (var _d = 0, targetTypes_3 = targetTypes; _d < targetTypes_3.length; _d++) {
+                        var t = targetTypes_3[_d];
+                        if (getInferenceInfoForType(t)) {
+                            typeVariable = t;
+                            typeVariableCount++;
+                        }
+                        else {
+                            inferFromTypes(source, t);
                         }
                     }
-                    var declaredTypes = ts.map(symbol.declarations, function (decl) { return decl.kind === 187 /* BinaryExpression */ ?
-                        checkExpressionCached(decl.right) :
-                        checkExpressionCached(decl.parent.right); });
-                    type = getUnionType(declaredTypes, /*subtypeReduction*/ true);
-                }
-                else {
-                    type = getWidenedTypeForVariableLikeDeclaration(declaration, /*reportErrors*/ true);
+                    // Next, if target containings a single naked type variable, make a secondary inference to that type
+                    // variable. This gives meaningful results for union types in co-variant positions and intersection
+                    // types in contra-variant positions (such as callback parameters).
+                    if (typeVariableCount === 1) {
+                        var savePriority = priority;
+                        priority |= 1 /* NakedTypeVariable */;
+                        inferFromTypes(source, typeVariable);
+                        priority = savePriority;
+                    }
                 }
-                if (!popTypeResolution()) {
-                    if (symbol.valueDeclaration.type) {
-                        // Variable has type annotation that circularly references the variable itself
-                        type = unknownType;
-                        error(symbol.valueDeclaration, ts.Diagnostics._0_is_referenced_directly_or_indirectly_in_its_own_type_annotation, symbolToString(symbol));
+                else if (source.flags & 196608 /* UnionOrIntersection */) {
+                    // Source is a union or intersection type, infer from each constituent type
+                    var sourceTypes = source.types;
+                    for (var _e = 0, sourceTypes_3 = sourceTypes; _e < sourceTypes_3.length; _e++) {
+                        var sourceType = sourceTypes_3[_e];
+                        inferFromTypes(sourceType, target);
                     }
-                    else {
-                        // Variable has initializer that circularly references the variable itself
-                        type = anyType;
-                        if (compilerOptions.noImplicitAny) {
-                            error(symbol.valueDeclaration, ts.Diagnostics._0_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_and_is_referenced_directly_or_indirectly_in_its_own_initializer, symbolToString(symbol));
+                }
+                else {
+                    source = getApparentType(source);
+                    if (source.flags & 32768 /* Object */) {
+                        var key = source.id + "," + target.id;
+                        if (visited && visited.get(key)) {
+                            return;
+                        }
+                        (visited || (visited = ts.createMap())).set(key, true);
+                        // If we are already processing another target type with the same associated symbol (such as
+                        // an instantiation of the same generic type), we do not explore this target as it would yield
+                        // no further inferences. We exclude the static side of classes from this check since it shares
+                        // its symbol with the instance side which would lead to false positives.
+                        var isNonConstructorObject = target.flags & 32768 /* Object */ &&
+                            !(getObjectFlags(target) & 16 /* Anonymous */ && target.symbol && target.symbol.flags & 32 /* Class */);
+                        var symbol = isNonConstructorObject ? target.symbol : undefined;
+                        if (symbol) {
+                            if (ts.contains(symbolStack, symbol)) {
+                                return;
+                            }
+                            (symbolStack || (symbolStack = [])).push(symbol);
+                            inferFromObjectTypes(source, target);
+                            symbolStack.pop();
+                        }
+                        else {
+                            inferFromObjectTypes(source, target);
                         }
                     }
                 }
-                links.type = type;
             }
-            return links.type;
-        }
-        function getAnnotatedAccessorType(accessor) {
-            if (accessor) {
-                if (accessor.kind === 149 /* GetAccessor */) {
-                    return accessor.type && getTypeFromTypeNode(accessor.type);
+            function getInferenceInfoForType(type) {
+                if (type.flags & 540672 /* TypeVariable */) {
+                    for (var _i = 0, inferences_1 = inferences; _i < inferences_1.length; _i++) {
+                        var inference = inferences_1[_i];
+                        if (type === inference.typeParameter) {
+                            return inference;
+                        }
+                    }
                 }
-                else {
-                    var setterTypeAnnotation = ts.getSetAccessorTypeAnnotationNode(accessor);
-                    return setterTypeAnnotation && getTypeFromTypeNode(setterTypeAnnotation);
+                return undefined;
+            }
+            function inferFromObjectTypes(source, target) {
+                if (getObjectFlags(target) & 32 /* Mapped */) {
+                    var constraintType = getConstraintTypeFromMappedType(target);
+                    if (constraintType.flags & 262144 /* Index */) {
+                        // We're inferring from some source type S to a homomorphic mapped type { [P in keyof T]: X },
+                        // where T is a type variable. Use inferTypeForHomomorphicMappedType to infer a suitable source
+                        // type and then make a secondary inference from that type to T. We make a secondary inference
+                        // such that direct inferences to T get priority over inferences to Partial<T>, for example.
+                        var inference = getInferenceInfoForType(constraintType.type);
+                        if (inference && !inference.isFixed) {
+                            var inferredType = inferTypeForHomomorphicMappedType(source, target);
+                            if (inferredType) {
+                                var savePriority = priority;
+                                priority |= 2 /* MappedType */;
+                                inferFromTypes(inferredType, inference.typeParameter);
+                                priority = savePriority;
+                            }
+                        }
+                        return;
+                    }
+                    if (constraintType.flags & 16384 /* TypeParameter */) {
+                        // We're inferring from some source type S to a mapped type { [P in T]: X }, where T is a type
+                        // parameter. Infer from 'keyof S' to T and infer from a union of each property type in S to X.
+                        inferFromTypes(getIndexType(source), constraintType);
+                        inferFromTypes(getUnionType(ts.map(getPropertiesOfType(source), getTypeOfSymbol)), getTemplateTypeFromMappedType(target));
+                        return;
+                    }
                 }
+                inferFromProperties(source, target);
+                inferFromSignatures(source, target, 0 /* Call */);
+                inferFromSignatures(source, target, 1 /* Construct */);
+                inferFromIndexTypes(source, target);
             }
-            return undefined;
-        }
-        function getAnnotatedAccessorThisParameter(accessor) {
-            var parameter = getAccessorThisParameter(accessor);
-            return parameter && parameter.symbol;
-        }
-        function getThisTypeOfDeclaration(declaration) {
-            return getThisTypeOfSignature(getSignatureFromDeclaration(declaration));
-        }
-        function getTypeOfAccessors(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.type) {
-                var getter = ts.getDeclarationOfKind(symbol, 149 /* GetAccessor */);
-                var setter = ts.getDeclarationOfKind(symbol, 150 /* SetAccessor */);
-                if (getter && getter.flags & 1048576 /* JavaScriptFile */) {
-                    var jsDocType = getTypeForVariableLikeDeclarationFromJSDocComment(getter);
-                    if (jsDocType) {
-                        return links.type = jsDocType;
+            function inferFromProperties(source, target) {
+                var properties = getPropertiesOfObjectType(target);
+                for (var _i = 0, properties_5 = properties; _i < properties_5.length; _i++) {
+                    var targetProp = properties_5[_i];
+                    var sourceProp = getPropertyOfObjectType(source, targetProp.name);
+                    if (sourceProp) {
+                        inferFromTypes(getTypeOfSymbol(sourceProp), getTypeOfSymbol(targetProp));
                     }
                 }
-                if (!pushTypeResolution(symbol, 0 /* Type */)) {
-                    return unknownType;
+            }
+            function inferFromSignatures(source, target, kind) {
+                var sourceSignatures = getSignaturesOfType(source, kind);
+                var targetSignatures = getSignaturesOfType(target, kind);
+                var sourceLen = sourceSignatures.length;
+                var targetLen = targetSignatures.length;
+                var len = sourceLen < targetLen ? sourceLen : targetLen;
+                for (var i = 0; i < len; i++) {
+                    inferFromSignature(getErasedSignature(sourceSignatures[sourceLen - len + i]), getErasedSignature(targetSignatures[targetLen - len + i]));
                 }
-                var type = void 0;
-                // First try to see if the user specified a return type on the get-accessor.
-                var getterReturnType = getAnnotatedAccessorType(getter);
-                if (getterReturnType) {
-                    type = getterReturnType;
+            }
+            function inferFromParameterTypes(source, target) {
+                return inferFromTypes(source, target);
+            }
+            function inferFromSignature(source, target) {
+                forEachMatchingParameterType(source, target, inferFromParameterTypes);
+                if (source.typePredicate && target.typePredicate && source.typePredicate.kind === target.typePredicate.kind) {
+                    inferFromTypes(source.typePredicate.type, target.typePredicate.type);
                 }
                 else {
-                    // If the user didn't specify a return type, try to use the set-accessor's parameter type.
-                    var setterParameterType = getAnnotatedAccessorType(setter);
-                    if (setterParameterType) {
-                        type = setterParameterType;
-                    }
-                    else {
-                        // If there are no specified types, try to infer it from the body of the get accessor if it exists.
-                        if (getter && getter.body) {
-                            type = getReturnTypeFromBody(getter);
-                        }
-                        else {
-                            if (compilerOptions.noImplicitAny) {
-                                if (setter) {
-                                    error(setter, ts.Diagnostics.Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_parameter_type_annotation, symbolToString(symbol));
-                                }
-                                else {
-                                    ts.Debug.assert(!!getter, "there must existed getter as we are current checking either setter or getter in this function");
-                                    error(getter, ts.Diagnostics.Property_0_implicitly_has_type_any_because_its_get_accessor_lacks_a_return_type_annotation, symbolToString(symbol));
-                                }
-                            }
-                            type = anyType;
-                        }
+                    inferFromTypes(getReturnTypeOfSignature(source), getReturnTypeOfSignature(target));
+                }
+            }
+            function inferFromIndexTypes(source, target) {
+                var targetStringIndexType = getIndexTypeOfType(target, 0 /* String */);
+                if (targetStringIndexType) {
+                    var sourceIndexType = getIndexTypeOfType(source, 0 /* String */) ||
+                        getImplicitIndexTypeOfType(source, 0 /* String */);
+                    if (sourceIndexType) {
+                        inferFromTypes(sourceIndexType, targetStringIndexType);
                     }
                 }
-                if (!popTypeResolution()) {
-                    type = anyType;
-                    if (compilerOptions.noImplicitAny) {
-                        var getter_1 = ts.getDeclarationOfKind(symbol, 149 /* GetAccessor */);
-                        error(getter_1, ts.Diagnostics._0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions, symbolToString(symbol));
+                var targetNumberIndexType = getIndexTypeOfType(target, 1 /* Number */);
+                if (targetNumberIndexType) {
+                    var sourceIndexType = getIndexTypeOfType(source, 1 /* Number */) ||
+                        getIndexTypeOfType(source, 0 /* String */) ||
+                        getImplicitIndexTypeOfType(source, 1 /* Number */);
+                    if (sourceIndexType) {
+                        inferFromTypes(sourceIndexType, targetNumberIndexType);
                     }
                 }
-                links.type = type;
             }
-            return links.type;
         }
-        function getTypeOfFuncClassEnumModule(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.type) {
-                if (symbol.valueDeclaration.kind === 225 /* ModuleDeclaration */ && ts.isShorthandAmbientModuleSymbol(symbol)) {
-                    links.type = anyType;
-                }
-                else {
-                    var type = createObjectType(2097152 /* Anonymous */, symbol);
-                    links.type = strictNullChecks && symbol.flags & 536870912 /* Optional */ ?
-                        includeFalsyTypes(type, 2048 /* Undefined */) : type;
+        function typeIdenticalToSomeType(type, types) {
+            for (var _i = 0, types_11 = types; _i < types_11.length; _i++) {
+                var t = types_11[_i];
+                if (isTypeIdenticalTo(t, type)) {
+                    return true;
                 }
             }
-            return links.type;
+            return false;
         }
-        function getTypeOfEnumMember(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.type) {
-                links.type = getDeclaredTypeOfEnumMember(symbol);
+        /**
+         * Return a new union or intersection type computed by removing a given set of types
+         * from a given union or intersection type.
+         */
+        function removeTypesFromUnionOrIntersection(type, typesToRemove) {
+            var reducedTypes = [];
+            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                var t = _a[_i];
+                if (!typeIdenticalToSomeType(t, typesToRemove)) {
+                    reducedTypes.push(t);
+                }
             }
-            return links.type;
+            return type.flags & 65536 /* Union */ ? getUnionType(reducedTypes) : getIntersectionType(reducedTypes);
         }
-        function getTypeOfAlias(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.type) {
-                var targetSymbol = resolveAlias(symbol);
-                // It only makes sense to get the type of a value symbol. If the result of resolving
-                // the alias is not a value, then it has no type. To get the type associated with a
-                // type symbol, call getDeclaredTypeOfSymbol.
-                // This check is important because without it, a call to getTypeOfSymbol could end
-                // up recursively calling getTypeOfAlias, causing a stack overflow.
-                links.type = targetSymbol.flags & 107455 /* Value */
-                    ? getTypeOfSymbol(targetSymbol)
-                    : unknownType;
+        function hasPrimitiveConstraint(type) {
+            var constraint = getConstraintOfTypeParameter(type);
+            return constraint && maybeTypeOfKind(constraint, 8190 /* Primitive */ | 262144 /* Index */);
+        }
+        function getInferredType(context, index) {
+            var inference = context.inferences[index];
+            var inferredType = inference.inferredType;
+            if (!inferredType) {
+                if (inference.candidates) {
+                    // We widen inferred literal types if
+                    // all inferences were made to top-level ocurrences of the type parameter, and
+                    // the type parameter has no constraint or its constraint includes no primitive or literal types, and
+                    // the type parameter was fixed during inference or does not occur at top-level in the return type.
+                    var signature = context.signature;
+                    var widenLiteralTypes = inference.topLevel &&
+                        !hasPrimitiveConstraint(inference.typeParameter) &&
+                        (inference.isFixed || !isTypeParameterAtTopLevel(getReturnTypeOfSignature(signature), inference.typeParameter));
+                    var baseCandidates = widenLiteralTypes ? ts.sameMap(inference.candidates, getWidenedLiteralType) : inference.candidates;
+                    // Infer widened union or supertype, or the unknown type for no common supertype. We infer union types
+                    // for inferences coming from return types in order to avoid common supertype failures.
+                    var unionOrSuperType = context.flags & 1 /* InferUnionTypes */ || inference.priority & 4 /* ReturnType */ ?
+                        getUnionType(baseCandidates, /*subtypeReduction*/ true) : getCommonSupertype(baseCandidates);
+                    inferredType = getWidenedType(unionOrSuperType);
+                }
+                else if (context.flags & 2 /* NoDefault */) {
+                    // We use silentNeverType as the wildcard that signals no inferences.
+                    inferredType = silentNeverType;
+                }
+                else {
+                    // Infer either the default or the empty object type when no inferences were
+                    // made. It is important to remember that in this case, inference still
+                    // succeeds, meaning there is no error for not having inference candidates. An
+                    // inference error only occurs when there are *conflicting* candidates, i.e.
+                    // candidates with no common supertype.
+                    var defaultType = getDefaultFromTypeParameter(inference.typeParameter);
+                    if (defaultType) {
+                        // Instantiate the default type. Any forward reference to a type
+                        // parameter should be instantiated to the empty object type.
+                        inferredType = instantiateType(defaultType, combineTypeMappers(createBackreferenceMapper(context.signature.typeParameters, index), context));
+                    }
+                    else {
+                        inferredType = context.flags & 4 /* AnyDefault */ ? anyType : emptyObjectType;
+                    }
+                }
+                inference.inferredType = inferredType;
+                var constraint = getConstraintOfTypeParameter(context.signature.typeParameters[index]);
+                if (constraint) {
+                    var instantiatedConstraint = instantiateType(constraint, context);
+                    if (!isTypeAssignableTo(inferredType, getTypeWithThisArgument(instantiatedConstraint, inferredType))) {
+                        inference.inferredType = inferredType = instantiatedConstraint;
+                    }
+                }
             }
-            return links.type;
+            return inferredType;
         }
-        function getTypeOfInstantiatedSymbol(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.type) {
-                links.type = instantiateType(getTypeOfSymbol(links.target), links.mapper);
+        function getInferredTypes(context) {
+            var result = [];
+            for (var i = 0; i < context.inferences.length; i++) {
+                result.push(getInferredType(context, i));
             }
-            return links.type;
+            return result;
         }
-        function getTypeOfSymbol(symbol) {
-            if (symbol.flags & 16777216 /* Instantiated */) {
-                return getTypeOfInstantiatedSymbol(symbol);
-            }
-            if (symbol.flags & (3 /* Variable */ | 4 /* Property */)) {
-                return getTypeOfVariableOrParameterOrProperty(symbol);
-            }
-            if (symbol.flags & (16 /* Function */ | 8192 /* Method */ | 32 /* Class */ | 384 /* Enum */ | 512 /* ValueModule */)) {
-                return getTypeOfFuncClassEnumModule(symbol);
+        // EXPRESSION TYPE CHECKING
+        function getResolvedSymbol(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedSymbol) {
+                links.resolvedSymbol = !ts.nodeIsMissing(node) && resolveName(node, node.text, 107455 /* Value */ | 1048576 /* ExportValue */, ts.Diagnostics.Cannot_find_name_0, node, ts.Diagnostics.Cannot_find_name_0_Did_you_mean_1) || unknownSymbol;
             }
-            if (symbol.flags & 8 /* EnumMember */) {
-                return getTypeOfEnumMember(symbol);
+            return links.resolvedSymbol;
+        }
+        function isInTypeQuery(node) {
+            // TypeScript 1.0 spec (April 2014): 3.6.3
+            // A type query consists of the keyword typeof followed by an expression.
+            // The expression is restricted to a single identifier or a sequence of identifiers separated by periods
+            return !!ts.findAncestor(node, function (n) { return n.kind === 162 /* TypeQuery */ ? true : n.kind === 71 /* Identifier */ || n.kind === 143 /* QualifiedName */ ? false : "quit"; });
+        }
+        // Return the flow cache key for a "dotted name" (i.e. a sequence of identifiers
+        // separated by dots). The key consists of the id of the symbol referenced by the
+        // leftmost identifier followed by zero or more property names separated by dots.
+        // The result is undefined if the reference isn't a dotted name. We prefix nodes
+        // occurring in an apparent type position with '@' because the control flow type
+        // of such nodes may be based on the apparent type instead of the declared type.
+        function getFlowCacheKey(node) {
+            if (node.kind === 71 /* Identifier */) {
+                var symbol = getResolvedSymbol(node);
+                return symbol !== unknownSymbol ? (isApparentTypePosition(node) ? "@" : "") + getSymbolId(symbol) : undefined;
             }
-            if (symbol.flags & 98304 /* Accessor */) {
-                return getTypeOfAccessors(symbol);
+            if (node.kind === 99 /* ThisKeyword */) {
+                return "0";
             }
-            if (symbol.flags & 8388608 /* Alias */) {
-                return getTypeOfAlias(symbol);
+            if (node.kind === 179 /* PropertyAccessExpression */) {
+                var key = getFlowCacheKey(node.expression);
+                return key && key + "." + node.name.text;
             }
-            return unknownType;
+            return undefined;
         }
-        function getTargetType(type) {
-            return type.flags & 131072 /* Reference */ ? type.target : type;
+        function getLeftmostIdentifierOrThis(node) {
+            switch (node.kind) {
+                case 71 /* Identifier */:
+                case 99 /* ThisKeyword */:
+                    return node;
+                case 179 /* PropertyAccessExpression */:
+                    return getLeftmostIdentifierOrThis(node.expression);
+            }
+            return undefined;
         }
-        function hasBaseType(type, checkBase) {
-            return check(type);
-            function check(type) {
-                var target = getTargetType(type);
-                return target === checkBase || ts.forEach(getBaseTypes(target), check);
+        function isMatchingReference(source, target) {
+            switch (source.kind) {
+                case 71 /* Identifier */:
+                    return target.kind === 71 /* Identifier */ && getResolvedSymbol(source) === getResolvedSymbol(target) ||
+                        (target.kind === 226 /* VariableDeclaration */ || target.kind === 176 /* BindingElement */) &&
+                            getExportSymbolOfValueSymbolIfExported(getResolvedSymbol(source)) === getSymbolOfNode(target);
+                case 99 /* ThisKeyword */:
+                    return target.kind === 99 /* ThisKeyword */;
+                case 97 /* SuperKeyword */:
+                    return target.kind === 97 /* SuperKeyword */;
+                case 179 /* PropertyAccessExpression */:
+                    return target.kind === 179 /* PropertyAccessExpression */ &&
+                        source.name.text === target.name.text &&
+                        isMatchingReference(source.expression, target.expression);
             }
+            return false;
         }
-        // Appends the type parameters given by a list of declarations to a set of type parameters and returns the resulting set.
-        // The function allocates a new array if the input type parameter set is undefined, but otherwise it modifies the set
-        // in-place and returns the same array.
-        function appendTypeParameters(typeParameters, declarations) {
-            for (var _i = 0, declarations_2 = declarations; _i < declarations_2.length; _i++) {
-                var declaration = declarations_2[_i];
-                var tp = getDeclaredTypeOfTypeParameter(getSymbolOfNode(declaration));
-                if (!typeParameters) {
-                    typeParameters = [tp];
-                }
-                else if (!ts.contains(typeParameters, tp)) {
-                    typeParameters.push(tp);
+        function containsMatchingReference(source, target) {
+            while (source.kind === 179 /* PropertyAccessExpression */) {
+                source = source.expression;
+                if (isMatchingReference(source, target)) {
+                    return true;
                 }
             }
-            return typeParameters;
+            return false;
         }
-        // Appends the outer type parameters of a node to a set of type parameters and returns the resulting set. The function
-        // allocates a new array if the input type parameter set is undefined, but otherwise it modifies the set in-place and
-        // returns the same array.
-        function appendOuterTypeParameters(typeParameters, node) {
-            while (true) {
-                node = node.parent;
-                if (!node) {
-                    return typeParameters;
-                }
-                if (node.kind === 221 /* ClassDeclaration */ || node.kind === 192 /* ClassExpression */ ||
-                    node.kind === 220 /* FunctionDeclaration */ || node.kind === 179 /* FunctionExpression */ ||
-                    node.kind === 147 /* MethodDeclaration */ || node.kind === 180 /* ArrowFunction */) {
-                    var declarations = node.typeParameters;
-                    if (declarations) {
-                        return appendTypeParameters(appendOuterTypeParameters(typeParameters, node), declarations);
+        // Return true if target is a property access xxx.yyy, source is a property access xxx.zzz, the declared
+        // type of xxx is a union type, and yyy is a property that is possibly a discriminant. We consider a property
+        // a possible discriminant if its type differs in the constituents of containing union type, and if every
+        // choice is a unit type or a union of unit types.
+        function containsMatchingReferenceDiscriminant(source, target) {
+            return target.kind === 179 /* PropertyAccessExpression */ &&
+                containsMatchingReference(source, target.expression) &&
+                isDiscriminantProperty(getDeclaredTypeOfReference(target.expression), target.name.text);
+        }
+        function getDeclaredTypeOfReference(expr) {
+            if (expr.kind === 71 /* Identifier */) {
+                return getTypeOfSymbol(getResolvedSymbol(expr));
+            }
+            if (expr.kind === 179 /* PropertyAccessExpression */) {
+                var type = getDeclaredTypeOfReference(expr.expression);
+                return type && getTypeOfPropertyOfType(type, expr.name.text);
+            }
+            return undefined;
+        }
+        function isDiscriminantProperty(type, name) {
+            if (type && type.flags & 65536 /* Union */) {
+                var prop = getUnionOrIntersectionProperty(type, name);
+                if (prop && ts.getCheckFlags(prop) & 2 /* SyntheticProperty */) {
+                    if (prop.isDiscriminantProperty === undefined) {
+                        prop.isDiscriminantProperty = prop.checkFlags & 32 /* HasNonUniformType */ && isLiteralType(getTypeOfSymbol(prop));
                     }
+                    return prop.isDiscriminantProperty;
                 }
             }
+            return false;
         }
-        // The outer type parameters are those defined by enclosing generic classes, methods, or functions.
-        function getOuterTypeParametersOfClassOrInterface(symbol) {
-            var declaration = symbol.flags & 32 /* Class */ ? symbol.valueDeclaration : ts.getDeclarationOfKind(symbol, 222 /* InterfaceDeclaration */);
-            return appendOuterTypeParameters(undefined, declaration);
+        function isOrContainsMatchingReference(source, target) {
+            return isMatchingReference(source, target) || containsMatchingReference(source, target);
         }
-        // The local type parameters are the combined set of type parameters from all declarations of the class,
-        // interface, or type alias.
-        function getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol) {
-            var result;
-            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                var node = _a[_i];
-                if (node.kind === 222 /* InterfaceDeclaration */ || node.kind === 221 /* ClassDeclaration */ ||
-                    node.kind === 192 /* ClassExpression */ || node.kind === 223 /* TypeAliasDeclaration */) {
-                    var declaration = node;
-                    if (declaration.typeParameters) {
-                        result = appendTypeParameters(result, declaration.typeParameters);
+        function hasMatchingArgument(callExpression, reference) {
+            if (callExpression.arguments) {
+                for (var _i = 0, _a = callExpression.arguments; _i < _a.length; _i++) {
+                    var argument = _a[_i];
+                    if (isOrContainsMatchingReference(reference, argument)) {
+                        return true;
                     }
                 }
             }
-            return result;
-        }
-        // The full set of type parameters for a generic class or interface type consists of its outer type parameters plus
-        // its locally declared type parameters.
-        function getTypeParametersOfClassOrInterface(symbol) {
-            return ts.concatenate(getOuterTypeParametersOfClassOrInterface(symbol), getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol));
-        }
-        function isConstructorType(type) {
-            return type.flags & 2588672 /* ObjectType */ && getSignaturesOfType(type, 1 /* Construct */).length > 0;
-        }
-        function getBaseTypeNodeOfClass(type) {
-            return ts.getClassExtendsHeritageClauseElement(type.symbol.valueDeclaration);
-        }
-        function getConstructorsForTypeArguments(type, typeArgumentNodes) {
-            var typeArgCount = typeArgumentNodes ? typeArgumentNodes.length : 0;
-            return ts.filter(getSignaturesOfType(type, 1 /* Construct */), function (sig) { return (sig.typeParameters ? sig.typeParameters.length : 0) === typeArgCount; });
+            if (callExpression.expression.kind === 179 /* PropertyAccessExpression */ &&
+                isOrContainsMatchingReference(reference, callExpression.expression.expression)) {
+                return true;
+            }
+            return false;
         }
-        function getInstantiatedConstructorsForTypeArguments(type, typeArgumentNodes) {
-            var signatures = getConstructorsForTypeArguments(type, typeArgumentNodes);
-            if (typeArgumentNodes) {
-                var typeArguments_1 = ts.map(typeArgumentNodes, getTypeFromTypeNodeNoAlias);
-                signatures = ts.map(signatures, function (sig) { return getSignatureInstantiation(sig, typeArguments_1); });
+        function getFlowNodeId(flow) {
+            if (!flow.id) {
+                flow.id = nextFlowId;
+                nextFlowId++;
             }
-            return signatures;
+            return flow.id;
         }
-        // The base constructor of a class can resolve to
-        // undefinedType if the class has no extends clause,
-        // unknownType if an error occurred during resolution of the extends expression,
-        // nullType if the extends expression is the null value, or
-        // an object type with at least one construct signature.
-        function getBaseConstructorTypeOfClass(type) {
-            if (!type.resolvedBaseConstructorType) {
-                var baseTypeNode = getBaseTypeNodeOfClass(type);
-                if (!baseTypeNode) {
-                    return type.resolvedBaseConstructorType = undefinedType;
-                }
-                if (!pushTypeResolution(type, 1 /* ResolvedBaseConstructorType */)) {
-                    return unknownType;
-                }
-                var baseConstructorType = checkExpression(baseTypeNode.expression);
-                if (baseConstructorType.flags & 2588672 /* ObjectType */) {
-                    // Resolving the members of a class requires us to resolve the base class of that class.
-                    // We force resolution here such that we catch circularities now.
-                    resolveStructuredTypeMembers(baseConstructorType);
-                }
-                if (!popTypeResolution()) {
-                    error(type.symbol.valueDeclaration, ts.Diagnostics._0_is_referenced_directly_or_indirectly_in_its_own_base_expression, symbolToString(type.symbol));
-                    return type.resolvedBaseConstructorType = unknownType;
-                }
-                if (baseConstructorType !== unknownType && baseConstructorType !== nullWideningType && !isConstructorType(baseConstructorType)) {
-                    error(baseTypeNode.expression, ts.Diagnostics.Type_0_is_not_a_constructor_function_type, typeToString(baseConstructorType));
-                    return type.resolvedBaseConstructorType = unknownType;
+        function typeMaybeAssignableTo(source, target) {
+            if (!(source.flags & 65536 /* Union */)) {
+                return isTypeAssignableTo(source, target);
+            }
+            for (var _i = 0, _a = source.types; _i < _a.length; _i++) {
+                var t = _a[_i];
+                if (isTypeAssignableTo(t, target)) {
+                    return true;
                 }
-                type.resolvedBaseConstructorType = baseConstructorType;
             }
-            return type.resolvedBaseConstructorType;
+            return false;
         }
-        function getBaseTypes(type) {
-            if (!type.resolvedBaseTypes) {
-                if (type.flags & 262144 /* Tuple */) {
-                    type.resolvedBaseTypes = [createArrayType(getUnionType(type.typeParameters))];
-                }
-                else if (type.symbol.flags & (32 /* Class */ | 64 /* Interface */)) {
-                    if (type.symbol.flags & 32 /* Class */) {
-                        resolveBaseTypesOfClass(type);
-                    }
-                    if (type.symbol.flags & 64 /* Interface */) {
-                        resolveBaseTypesOfInterface(type);
-                    }
+        // Remove those constituent types of declaredType to which no constituent type of assignedType is assignable.
+        // For example, when a variable of type number | string | boolean is assigned a value of type number | boolean,
+        // we remove type string.
+        function getAssignmentReducedType(declaredType, assignedType) {
+            if (declaredType !== assignedType) {
+                if (assignedType.flags & 8192 /* Never */) {
+                    return assignedType;
                 }
-                else {
-                    ts.Debug.fail("type must be class or interface");
+                var reducedType = filterType(declaredType, function (t) { return typeMaybeAssignableTo(assignedType, t); });
+                if (!(reducedType.flags & 8192 /* Never */)) {
+                    return reducedType;
                 }
             }
-            return type.resolvedBaseTypes;
+            return declaredType;
         }
-        function resolveBaseTypesOfClass(type) {
-            type.resolvedBaseTypes = type.resolvedBaseTypes || emptyArray;
-            var baseConstructorType = getBaseConstructorTypeOfClass(type);
-            if (!(baseConstructorType.flags & 2588672 /* ObjectType */)) {
-                return;
+        function getTypeFactsOfTypes(types) {
+            var result = 0 /* None */;
+            for (var _i = 0, types_12 = types; _i < types_12.length; _i++) {
+                var t = types_12[_i];
+                result |= getTypeFacts(t);
             }
-            var baseTypeNode = getBaseTypeNodeOfClass(type);
-            var baseType;
-            var originalBaseType = baseConstructorType && baseConstructorType.symbol ? getDeclaredTypeOfSymbol(baseConstructorType.symbol) : undefined;
-            if (baseConstructorType.symbol && baseConstructorType.symbol.flags & 32 /* Class */ &&
-                areAllOuterTypeParametersApplied(originalBaseType)) {
-                // When base constructor type is a class with no captured type arguments we know that the constructors all have the same type parameters as the
-                // class and all return the instance type of the class. There is no need for further checks and we can apply the
-                // type arguments in the same manner as a type reference to get the same error reporting experience.
-                baseType = getTypeFromClassOrInterfaceReference(baseTypeNode, baseConstructorType.symbol);
+            return result;
+        }
+        function isFunctionObjectType(type) {
+            // We do a quick check for a "bind" property before performing the more expensive subtype
+            // check. This gives us a quicker out in the common case where an object type is not a function.
+            var resolved = resolveStructuredTypeMembers(type);
+            return !!(resolved.callSignatures.length || resolved.constructSignatures.length ||
+                resolved.members.get("bind") && isTypeSubtypeOf(type, globalFunctionType));
+        }
+        function getTypeFacts(type) {
+            var flags = type.flags;
+            if (flags & 2 /* String */) {
+                return strictNullChecks ? 4079361 /* StringStrictFacts */ : 4194049 /* StringFacts */;
             }
-            else {
-                // The class derives from a "class-like" constructor function, check that we have at least one construct signature
-                // with a matching number of type parameters and use the return type of the first instantiated signature. Elsewhere
-                // we check that all instantiated signatures return the same type.
-                var constructors = getInstantiatedConstructorsForTypeArguments(baseConstructorType, baseTypeNode.typeArguments);
-                if (!constructors.length) {
-                    error(baseTypeNode.expression, ts.Diagnostics.No_base_constructor_has_the_specified_number_of_type_arguments);
-                    return;
-                }
-                baseType = getReturnTypeOfSignature(constructors[0]);
+            if (flags & 32 /* StringLiteral */) {
+                var isEmpty = type.value === "";
+                return strictNullChecks ?
+                    isEmpty ? 3030785 /* EmptyStringStrictFacts */ : 1982209 /* NonEmptyStringStrictFacts */ :
+                    isEmpty ? 3145473 /* EmptyStringFacts */ : 4194049 /* NonEmptyStringFacts */;
             }
-            if (baseType === unknownType) {
-                return;
+            if (flags & (4 /* Number */ | 16 /* Enum */)) {
+                return strictNullChecks ? 4079234 /* NumberStrictFacts */ : 4193922 /* NumberFacts */;
             }
-            if (!(getTargetType(baseType).flags & (32768 /* Class */ | 65536 /* Interface */))) {
-                error(baseTypeNode.expression, ts.Diagnostics.Base_constructor_return_type_0_is_not_a_class_or_interface_type, typeToString(baseType));
-                return;
+            if (flags & 64 /* NumberLiteral */) {
+                var isZero = type.value === 0;
+                return strictNullChecks ?
+                    isZero ? 3030658 /* ZeroStrictFacts */ : 1982082 /* NonZeroStrictFacts */ :
+                    isZero ? 3145346 /* ZeroFacts */ : 4193922 /* NonZeroFacts */;
             }
-            if (type === baseType || hasBaseType(baseType, type)) {
-                error(type.symbol.valueDeclaration, ts.Diagnostics.Type_0_recursively_references_itself_as_a_base_type, typeToString(type, /*enclosingDeclaration*/ undefined, 1 /* WriteArrayAsGenericType */));
-                return;
+            if (flags & 8 /* Boolean */) {
+                return strictNullChecks ? 4078980 /* BooleanStrictFacts */ : 4193668 /* BooleanFacts */;
             }
-            if (type.resolvedBaseTypes === emptyArray) {
-                type.resolvedBaseTypes = [baseType];
+            if (flags & 136 /* BooleanLike */) {
+                return strictNullChecks ?
+                    type === falseType ? 3030404 /* FalseStrictFacts */ : 1981828 /* TrueStrictFacts */ :
+                    type === falseType ? 3145092 /* FalseFacts */ : 4193668 /* TrueFacts */;
             }
-            else {
-                type.resolvedBaseTypes.push(baseType);
+            if (flags & 32768 /* Object */) {
+                return isFunctionObjectType(type) ?
+                    strictNullChecks ? 6164448 /* FunctionStrictFacts */ : 8376288 /* FunctionFacts */ :
+                    strictNullChecks ? 6166480 /* ObjectStrictFacts */ : 8378320 /* ObjectFacts */;
             }
-        }
-        function areAllOuterTypeParametersApplied(type) {
-            // An unapplied type parameter has its symbol still the same as the matching argument symbol.
-            // Since parameters are applied outer-to-inner, only the last outer parameter needs to be checked.
-            var outerTypeParameters = type.outerTypeParameters;
-            if (outerTypeParameters) {
-                var last = outerTypeParameters.length - 1;
-                var typeArguments = type.typeArguments;
-                return outerTypeParameters[last].symbol !== typeArguments[last].symbol;
+            if (flags & (1024 /* Void */ | 2048 /* Undefined */)) {
+                return 2457472 /* UndefinedFacts */;
             }
-            return true;
-        }
-        function resolveBaseTypesOfInterface(type) {
-            type.resolvedBaseTypes = type.resolvedBaseTypes || emptyArray;
-            for (var _i = 0, _a = type.symbol.declarations; _i < _a.length; _i++) {
-                var declaration = _a[_i];
-                if (declaration.kind === 222 /* InterfaceDeclaration */ && ts.getInterfaceBaseTypeNodes(declaration)) {
-                    for (var _b = 0, _c = ts.getInterfaceBaseTypeNodes(declaration); _b < _c.length; _b++) {
-                        var node = _c[_b];
-                        var baseType = getTypeFromTypeNode(node);
-                        if (baseType !== unknownType) {
-                            if (getTargetType(baseType).flags & (32768 /* Class */ | 65536 /* Interface */)) {
-                                if (type !== baseType && !hasBaseType(baseType, type)) {
-                                    if (type.resolvedBaseTypes === emptyArray) {
-                                        type.resolvedBaseTypes = [baseType];
-                                    }
-                                    else {
-                                        type.resolvedBaseTypes.push(baseType);
-                                    }
-                                }
-                                else {
-                                    error(declaration, ts.Diagnostics.Type_0_recursively_references_itself_as_a_base_type, typeToString(type, /*enclosingDeclaration*/ undefined, 1 /* WriteArrayAsGenericType */));
-                                }
-                            }
-                            else {
-                                error(node, ts.Diagnostics.An_interface_may_only_extend_a_class_or_another_interface);
-                            }
-                        }
-                    }
-                }
+            if (flags & 4096 /* Null */) {
+                return 2340752 /* NullFacts */;
             }
-        }
-        // Returns true if the interface given by the symbol is free of "this" references. Specifically, the result is
-        // true if the interface itself contains no references to "this" in its body, if all base types are interfaces,
-        // and if none of the base interfaces have a "this" type.
-        function isIndependentInterface(symbol) {
-            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                var declaration = _a[_i];
-                if (declaration.kind === 222 /* InterfaceDeclaration */) {
-                    if (declaration.flags & 64 /* ContainsThis */) {
-                        return false;
-                    }
-                    var baseTypeNodes = ts.getInterfaceBaseTypeNodes(declaration);
-                    if (baseTypeNodes) {
-                        for (var _b = 0, baseTypeNodes_1 = baseTypeNodes; _b < baseTypeNodes_1.length; _b++) {
-                            var node = baseTypeNodes_1[_b];
-                            if (ts.isEntityNameExpression(node.expression)) {
-                                var baseSymbol = resolveEntityName(node.expression, 793064 /* Type */, /*ignoreErrors*/ true);
-                                if (!baseSymbol || !(baseSymbol.flags & 64 /* Interface */) || getDeclaredTypeOfClassOrInterface(baseSymbol).thisType) {
-                                    return false;
-                                }
-                            }
-                        }
-                    }
-                }
+            if (flags & 512 /* ESSymbol */) {
+                return strictNullChecks ? 1981320 /* SymbolStrictFacts */ : 4193160 /* SymbolFacts */;
             }
-            return true;
-        }
-        function getDeclaredTypeOfClassOrInterface(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.declaredType) {
-                var kind = symbol.flags & 32 /* Class */ ? 32768 /* Class */ : 65536 /* Interface */;
-                var type = links.declaredType = createObjectType(kind, symbol);
-                var outerTypeParameters = getOuterTypeParametersOfClassOrInterface(symbol);
-                var localTypeParameters = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol);
-                // A class or interface is generic if it has type parameters or a "this" type. We always give classes a "this" type
-                // because it is not feasible to analyze all members to determine if the "this" type escapes the class (in particular,
-                // property types inferred from initializers and method return types inferred from return statements are very hard
-                // to exhaustively analyze). We give interfaces a "this" type if we can't definitely determine that they are free of
-                // "this" references.
-                if (outerTypeParameters || localTypeParameters || kind === 32768 /* Class */ || !isIndependentInterface(symbol)) {
-                    type.flags |= 131072 /* Reference */;
-                    type.typeParameters = ts.concatenate(outerTypeParameters, localTypeParameters);
-                    type.outerTypeParameters = outerTypeParameters;
-                    type.localTypeParameters = localTypeParameters;
-                    type.instantiations = ts.createMap();
-                    type.instantiations[getTypeListId(type.typeParameters)] = type;
-                    type.target = type;
-                    type.typeArguments = type.typeParameters;
-                    type.thisType = createType(16384 /* TypeParameter */ | 268435456 /* ThisType */);
-                    type.thisType.symbol = symbol;
-                    type.thisType.constraint = type;
-                }
+            if (flags & 16777216 /* NonPrimitive */) {
+                return strictNullChecks ? 6166480 /* ObjectStrictFacts */ : 8378320 /* ObjectFacts */;
             }
-            return links.declaredType;
-        }
-        function getDeclaredTypeOfTypeAlias(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.declaredType) {
-                // Note that we use the links object as the target here because the symbol object is used as the unique
-                // identity for resolution of the 'type' property in SymbolLinks.
-                if (!pushTypeResolution(symbol, 2 /* DeclaredType */)) {
-                    return unknownType;
-                }
-                var typeParameters = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol);
-                var declaration = ts.getDeclarationOfKind(symbol, 279 /* JSDocTypedefTag */);
-                var type = void 0;
-                if (declaration) {
-                    if (declaration.jsDocTypeLiteral) {
-                        type = getTypeFromTypeNode(declaration.jsDocTypeLiteral);
-                    }
-                    else {
-                        type = getTypeFromTypeNode(declaration.typeExpression.type);
-                    }
-                }
-                else {
-                    declaration = ts.getDeclarationOfKind(symbol, 223 /* TypeAliasDeclaration */);
-                    type = getTypeFromTypeNode(declaration.type, symbol, typeParameters);
-                }
-                if (popTypeResolution()) {
-                    links.typeParameters = typeParameters;
-                    if (typeParameters) {
-                        // Initialize the instantiation cache for generic type aliases. The declared type corresponds to
-                        // an instantiation of the type alias with the type parameters supplied as type arguments.
-                        links.instantiations = ts.createMap();
-                        links.instantiations[getTypeListId(links.typeParameters)] = type;
-                    }
-                }
-                else {
-                    type = unknownType;
-                    error(declaration.name, ts.Diagnostics.Type_alias_0_circularly_references_itself, symbolToString(symbol));
-                }
-                links.declaredType = type;
+            if (flags & 540672 /* TypeVariable */) {
+                return getTypeFacts(getBaseConstraintOfType(type) || emptyObjectType);
             }
-            return links.declaredType;
-        }
-        function isLiteralEnumMember(symbol, member) {
-            var expr = member.initializer;
-            if (!expr) {
-                return !ts.isInAmbientContext(member);
+            if (flags & 196608 /* UnionOrIntersection */) {
+                return getTypeFactsOfTypes(type.types);
             }
-            return expr.kind === 8 /* NumericLiteral */ ||
-                expr.kind === 185 /* PrefixUnaryExpression */ && expr.operator === 36 /* MinusToken */ &&
-                    expr.operand.kind === 8 /* NumericLiteral */ ||
-                expr.kind === 69 /* Identifier */ && !!symbol.exports[expr.text];
+            return 8388607 /* All */;
         }
-        function enumHasLiteralMembers(symbol) {
-            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                var declaration = _a[_i];
-                if (declaration.kind === 224 /* EnumDeclaration */) {
-                    for (var _b = 0, _c = declaration.members; _b < _c.length; _b++) {
-                        var member = _c[_b];
-                        if (!isLiteralEnumMember(symbol, member)) {
-                            return false;
-                        }
-                    }
-                }
-            }
-            return true;
+        function getTypeWithFacts(type, include) {
+            return filterType(type, function (t) { return (getTypeFacts(t) & include) !== 0; });
         }
-        function createEnumLiteralType(symbol, baseType, text) {
-            var type = createType(256 /* EnumLiteral */);
-            type.symbol = symbol;
-            type.baseType = baseType;
-            type.text = text;
+        function getTypeWithDefault(type, defaultExpression) {
+            if (defaultExpression) {
+                var defaultType = getTypeOfExpression(defaultExpression);
+                return getUnionType([getTypeWithFacts(type, 131072 /* NEUndefined */), defaultType]);
+            }
             return type;
         }
-        function getDeclaredTypeOfEnum(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.declaredType) {
-                var enumType = links.declaredType = createType(16 /* Enum */);
-                enumType.symbol = symbol;
-                if (enumHasLiteralMembers(symbol)) {
-                    var memberTypeList = [];
-                    var memberTypes = ts.createMap();
-                    for (var _i = 0, _a = enumType.symbol.declarations; _i < _a.length; _i++) {
-                        var declaration = _a[_i];
-                        if (declaration.kind === 224 /* EnumDeclaration */) {
-                            computeEnumMemberValues(declaration);
-                            for (var _b = 0, _c = declaration.members; _b < _c.length; _b++) {
-                                var member = _c[_b];
-                                var memberSymbol = getSymbolOfNode(member);
-                                var value = getEnumMemberValue(member);
-                                if (!memberTypes[value]) {
-                                    var memberType = memberTypes[value] = createEnumLiteralType(memberSymbol, enumType, "" + value);
-                                    memberTypeList.push(memberType);
-                                }
-                            }
-                        }
-                    }
-                    enumType.memberTypes = memberTypes;
-                    if (memberTypeList.length > 1) {
-                        enumType.flags |= 524288 /* Union */;
-                        enumType.types = memberTypeList;
-                        unionTypes[getTypeListId(memberTypeList)] = enumType;
-                    }
-                }
-            }
-            return links.declaredType;
+        function getTypeOfDestructuredProperty(type, name) {
+            var text = ts.getTextOfPropertyName(name);
+            return getTypeOfPropertyOfType(type, text) ||
+                isNumericLiteralName(text) && getIndexTypeOfType(type, 1 /* Number */) ||
+                getIndexTypeOfType(type, 0 /* String */) ||
+                unknownType;
         }
-        function getDeclaredTypeOfEnumMember(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.declaredType) {
-                var enumType = getDeclaredTypeOfEnum(getParentOfSymbol(symbol));
-                links.declaredType = enumType.flags & 524288 /* Union */ ?
-                    enumType.memberTypes[getEnumMemberValue(symbol.valueDeclaration)] :
-                    enumType;
-            }
-            return links.declaredType;
+        function getTypeOfDestructuredArrayElement(type, index) {
+            return isTupleLikeType(type) && getTypeOfPropertyOfType(type, "" + index) ||
+                checkIteratedTypeOrElementType(type, /*errorNode*/ undefined, /*allowStringInput*/ false, /*allowAsyncIterables*/ false) ||
+                unknownType;
         }
-        function getDeclaredTypeOfTypeParameter(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.declaredType) {
-                var type = createType(16384 /* TypeParameter */);
-                type.symbol = symbol;
-                if (!ts.getDeclarationOfKind(symbol, 141 /* TypeParameter */).constraint) {
-                    type.constraint = noConstraintType;
-                }
-                links.declaredType = type;
-            }
-            return links.declaredType;
+        function getTypeOfDestructuredSpreadExpression(type) {
+            return createArrayType(checkIteratedTypeOrElementType(type, /*errorNode*/ undefined, /*allowStringInput*/ false, /*allowAsyncIterables*/ false) || unknownType);
         }
-        function getDeclaredTypeOfAlias(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.declaredType) {
-                links.declaredType = getDeclaredTypeOfSymbol(resolveAlias(symbol));
-            }
-            return links.declaredType;
+        function getAssignedTypeOfBinaryExpression(node) {
+            var isDestructuringDefaultAssignment = node.parent.kind === 177 /* ArrayLiteralExpression */ && isDestructuringAssignmentTarget(node.parent) ||
+                node.parent.kind === 261 /* PropertyAssignment */ && isDestructuringAssignmentTarget(node.parent.parent);
+            return isDestructuringDefaultAssignment ?
+                getTypeWithDefault(getAssignedType(node), node.right) :
+                getTypeOfExpression(node.right);
         }
-        function getDeclaredTypeOfSymbol(symbol) {
-            ts.Debug.assert((symbol.flags & 16777216 /* Instantiated */) === 0);
-            if (symbol.flags & (32 /* Class */ | 64 /* Interface */)) {
-                return getDeclaredTypeOfClassOrInterface(symbol);
-            }
-            if (symbol.flags & 524288 /* TypeAlias */) {
-                return getDeclaredTypeOfTypeAlias(symbol);
-            }
-            if (symbol.flags & 262144 /* TypeParameter */) {
-                return getDeclaredTypeOfTypeParameter(symbol);
-            }
-            if (symbol.flags & 384 /* Enum */) {
-                return getDeclaredTypeOfEnum(symbol);
+        function isDestructuringAssignmentTarget(parent) {
+            return parent.parent.kind === 194 /* BinaryExpression */ && parent.parent.left === parent ||
+                parent.parent.kind === 216 /* ForOfStatement */ && parent.parent.initializer === parent;
+        }
+        function getAssignedTypeOfArrayLiteralElement(node, element) {
+            return getTypeOfDestructuredArrayElement(getAssignedType(node), ts.indexOf(node.elements, element));
+        }
+        function getAssignedTypeOfSpreadExpression(node) {
+            return getTypeOfDestructuredSpreadExpression(getAssignedType(node.parent));
+        }
+        function getAssignedTypeOfPropertyAssignment(node) {
+            return getTypeOfDestructuredProperty(getAssignedType(node.parent), node.name);
+        }
+        function getAssignedTypeOfShorthandPropertyAssignment(node) {
+            return getTypeWithDefault(getAssignedTypeOfPropertyAssignment(node), node.objectAssignmentInitializer);
+        }
+        function getAssignedType(node) {
+            var parent = node.parent;
+            switch (parent.kind) {
+                case 215 /* ForInStatement */:
+                    return stringType;
+                case 216 /* ForOfStatement */:
+                    return checkRightHandSideOfForOf(parent.expression, parent.awaitModifier) || unknownType;
+                case 194 /* BinaryExpression */:
+                    return getAssignedTypeOfBinaryExpression(parent);
+                case 188 /* DeleteExpression */:
+                    return undefinedType;
+                case 177 /* ArrayLiteralExpression */:
+                    return getAssignedTypeOfArrayLiteralElement(parent, node);
+                case 198 /* SpreadElement */:
+                    return getAssignedTypeOfSpreadExpression(parent);
+                case 261 /* PropertyAssignment */:
+                    return getAssignedTypeOfPropertyAssignment(parent);
+                case 262 /* ShorthandPropertyAssignment */:
+                    return getAssignedTypeOfShorthandPropertyAssignment(parent);
             }
-            if (symbol.flags & 8 /* EnumMember */) {
-                return getDeclaredTypeOfEnumMember(symbol);
+            return unknownType;
+        }
+        function getInitialTypeOfBindingElement(node) {
+            var pattern = node.parent;
+            var parentType = getInitialType(pattern.parent);
+            var type = pattern.kind === 174 /* ObjectBindingPattern */ ?
+                getTypeOfDestructuredProperty(parentType, node.propertyName || node.name) :
+                !node.dotDotDotToken ?
+                    getTypeOfDestructuredArrayElement(parentType, ts.indexOf(pattern.elements, node)) :
+                    getTypeOfDestructuredSpreadExpression(parentType);
+            return getTypeWithDefault(type, node.initializer);
+        }
+        function getTypeOfInitializer(node) {
+            // Return the cached type if one is available. If the type of the variable was inferred
+            // from its initializer, we'll already have cached the type. Otherwise we compute it now
+            // without caching such that transient types are reflected.
+            var links = getNodeLinks(node);
+            return links.resolvedType || getTypeOfExpression(node);
+        }
+        function getInitialTypeOfVariableDeclaration(node) {
+            if (node.initializer) {
+                return getTypeOfInitializer(node.initializer);
             }
-            if (symbol.flags & 8388608 /* Alias */) {
-                return getDeclaredTypeOfAlias(symbol);
+            if (node.parent.parent.kind === 215 /* ForInStatement */) {
+                return stringType;
+            }
+            if (node.parent.parent.kind === 216 /* ForOfStatement */) {
+                return checkRightHandSideOfForOf(node.parent.parent.expression, node.parent.parent.awaitModifier) || unknownType;
             }
             return unknownType;
         }
-        // A type reference is considered independent if each type argument is considered independent.
-        function isIndependentTypeReference(node) {
-            if (node.typeArguments) {
-                for (var _i = 0, _a = node.typeArguments; _i < _a.length; _i++) {
-                    var typeNode = _a[_i];
-                    if (!isIndependentType(typeNode)) {
-                        return false;
-                    }
-                }
-            }
-            return true;
+        function getInitialType(node) {
+            return node.kind === 226 /* VariableDeclaration */ ?
+                getInitialTypeOfVariableDeclaration(node) :
+                getInitialTypeOfBindingElement(node);
         }
-        // A type is considered independent if it the any, string, number, boolean, symbol, or void keyword, a string
-        // literal type, an array with an element type that is considered independent, or a type reference that is
-        // considered independent.
-        function isIndependentType(node) {
+        function getInitialOrAssignedType(node) {
+            return node.kind === 226 /* VariableDeclaration */ || node.kind === 176 /* BindingElement */ ?
+                getInitialType(node) :
+                getAssignedType(node);
+        }
+        function isEmptyArrayAssignment(node) {
+            return node.kind === 226 /* VariableDeclaration */ && node.initializer &&
+                isEmptyArrayLiteral(node.initializer) ||
+                node.kind !== 176 /* BindingElement */ && node.parent.kind === 194 /* BinaryExpression */ &&
+                    isEmptyArrayLiteral(node.parent.right);
+        }
+        function getReferenceCandidate(node) {
             switch (node.kind) {
-                case 117 /* AnyKeyword */:
-                case 132 /* StringKeyword */:
-                case 130 /* NumberKeyword */:
-                case 120 /* BooleanKeyword */:
-                case 133 /* SymbolKeyword */:
-                case 103 /* VoidKeyword */:
-                case 135 /* UndefinedKeyword */:
-                case 93 /* NullKeyword */:
-                case 127 /* NeverKeyword */:
-                case 166 /* LiteralType */:
-                    return true;
-                case 160 /* ArrayType */:
-                    return isIndependentType(node.elementType);
-                case 155 /* TypeReference */:
-                    return isIndependentTypeReference(node);
+                case 185 /* ParenthesizedExpression */:
+                    return getReferenceCandidate(node.expression);
+                case 194 /* BinaryExpression */:
+                    switch (node.operatorToken.kind) {
+                        case 58 /* EqualsToken */:
+                            return getReferenceCandidate(node.left);
+                        case 26 /* CommaToken */:
+                            return getReferenceCandidate(node.right);
+                    }
             }
-            return false;
+            return node;
         }
-        // A variable-like declaration is considered independent (free of this references) if it has a type annotation
-        // that specifies an independent type, or if it has no type annotation and no initializer (and thus of type any).
-        function isIndependentVariableLikeDeclaration(node) {
-            return node.type && isIndependentType(node.type) || !node.type && !node.initializer;
+        function getReferenceRoot(node) {
+            var parent = node.parent;
+            return parent.kind === 185 /* ParenthesizedExpression */ ||
+                parent.kind === 194 /* BinaryExpression */ && parent.operatorToken.kind === 58 /* EqualsToken */ && parent.left === node ||
+                parent.kind === 194 /* BinaryExpression */ && parent.operatorToken.kind === 26 /* CommaToken */ && parent.right === node ?
+                getReferenceRoot(parent) : node;
         }
-        // A function-like declaration is considered independent (free of this references) if it has a return type
-        // annotation that is considered independent and if each parameter is considered independent.
-        function isIndependentFunctionLikeDeclaration(node) {
-            if (node.kind !== 148 /* Constructor */ && (!node.type || !isIndependentType(node.type))) {
-                return false;
-            }
-            for (var _i = 0, _a = node.parameters; _i < _a.length; _i++) {
-                var parameter = _a[_i];
-                if (!isIndependentVariableLikeDeclaration(parameter)) {
-                    return false;
-                }
+        function getTypeOfSwitchClause(clause) {
+            if (clause.kind === 257 /* CaseClause */) {
+                var caseType = getRegularTypeOfLiteralType(getTypeOfExpression(clause.expression));
+                return isUnitType(caseType) ? caseType : undefined;
             }
-            return true;
+            return neverType;
         }
-        // Returns true if the class or interface member given by the symbol is free of "this" references. The
-        // function may return false for symbols that are actually free of "this" references because it is not
-        // feasible to perform a complete analysis in all cases. In particular, property members with types
-        // inferred from their initializers and function members with inferred return types are conservatively
-        // assumed not to be free of "this" references.
-        function isIndependentMember(symbol) {
-            if (symbol.declarations && symbol.declarations.length === 1) {
-                var declaration = symbol.declarations[0];
-                if (declaration) {
-                    switch (declaration.kind) {
-                        case 145 /* PropertyDeclaration */:
-                        case 144 /* PropertySignature */:
-                            return isIndependentVariableLikeDeclaration(declaration);
-                        case 147 /* MethodDeclaration */:
-                        case 146 /* MethodSignature */:
-                        case 148 /* Constructor */:
-                            return isIndependentFunctionLikeDeclaration(declaration);
-                    }
-                }
+        function getSwitchClauseTypes(switchStatement) {
+            var links = getNodeLinks(switchStatement);
+            if (!links.switchTypes) {
+                // If all case clauses specify expressions that have unit types, we return an array
+                // of those unit types. Otherwise we return an empty array.
+                var types = ts.map(switchStatement.caseBlock.clauses, getTypeOfSwitchClause);
+                links.switchTypes = !ts.contains(types, undefined) ? types : emptyArray;
             }
-            return false;
+            return links.switchTypes;
         }
-        function createSymbolTable(symbols) {
-            var result = ts.createMap();
-            for (var _i = 0, symbols_1 = symbols; _i < symbols_1.length; _i++) {
-                var symbol = symbols_1[_i];
-                result[symbol.name] = symbol;
-            }
-            return result;
+        function eachTypeContainedIn(source, types) {
+            return source.flags & 65536 /* Union */ ? !ts.forEach(source.types, function (t) { return !ts.contains(types, t); }) : ts.contains(types, source);
         }
-        // The mappingThisOnly flag indicates that the only type parameter being mapped is "this". When the flag is true,
-        // we check symbols to see if we can quickly conclude they are free of "this" references, thus needing no instantiation.
-        function createInstantiatedSymbolTable(symbols, mapper, mappingThisOnly) {
-            var result = ts.createMap();
-            for (var _i = 0, symbols_2 = symbols; _i < symbols_2.length; _i++) {
-                var symbol = symbols_2[_i];
-                result[symbol.name] = mappingThisOnly && isIndependentMember(symbol) ? symbol : instantiateSymbol(symbol, mapper);
-            }
-            return result;
+        function isTypeSubsetOf(source, target) {
+            return source === target || target.flags & 65536 /* Union */ && isTypeSubsetOfUnion(source, target);
         }
-        function addInheritedMembers(symbols, baseSymbols) {
-            for (var _i = 0, baseSymbols_1 = baseSymbols; _i < baseSymbols_1.length; _i++) {
-                var s = baseSymbols_1[_i];
-                if (!symbols[s.name]) {
-                    symbols[s.name] = s;
+        function isTypeSubsetOfUnion(source, target) {
+            if (source.flags & 65536 /* Union */) {
+                for (var _i = 0, _a = source.types; _i < _a.length; _i++) {
+                    var t = _a[_i];
+                    if (!containsType(target.types, t)) {
+                        return false;
+                    }
                 }
+                return true;
             }
-        }
-        function resolveDeclaredMembers(type) {
-            if (!type.declaredProperties) {
-                var symbol = type.symbol;
-                type.declaredProperties = getNamedMembers(symbol.members);
-                type.declaredCallSignatures = getSignaturesOfSymbol(symbol.members["__call"]);
-                type.declaredConstructSignatures = getSignaturesOfSymbol(symbol.members["__new"]);
-                type.declaredStringIndexInfo = getIndexInfoOfSymbol(symbol, 0 /* String */);
-                type.declaredNumberIndexInfo = getIndexInfoOfSymbol(symbol, 1 /* Number */);
+            if (source.flags & 256 /* EnumLiteral */ && getBaseTypeOfEnumLiteralType(source) === target) {
+                return true;
             }
-            return type;
+            return containsType(target.types, source);
         }
-        function getTypeWithThisArgument(type, thisArgument) {
-            if (type.flags & 131072 /* Reference */) {
-                return createTypeReference(type.target, ts.concatenate(type.typeArguments, [thisArgument || type.target.thisType]));
-            }
-            return type;
+        function forEachType(type, f) {
+            return type.flags & 65536 /* Union */ ? ts.forEach(type.types, f) : f(type);
         }
-        function resolveObjectTypeMembers(type, source, typeParameters, typeArguments) {
-            var mapper;
-            var members;
-            var callSignatures;
-            var constructSignatures;
-            var stringIndexInfo;
-            var numberIndexInfo;
-            if (ts.rangeEquals(typeParameters, typeArguments, 0, typeParameters.length)) {
-                mapper = identityMapper;
-                members = source.symbol ? source.symbol.members : createSymbolTable(source.declaredProperties);
-                callSignatures = source.declaredCallSignatures;
-                constructSignatures = source.declaredConstructSignatures;
-                stringIndexInfo = source.declaredStringIndexInfo;
-                numberIndexInfo = source.declaredNumberIndexInfo;
+        function filterType(type, f) {
+            if (type.flags & 65536 /* Union */) {
+                var types = type.types;
+                var filtered = ts.filter(types, f);
+                return filtered === types ? type : getUnionTypeFromSortedList(filtered);
             }
-            else {
-                mapper = createTypeMapper(typeParameters, typeArguments);
-                members = createInstantiatedSymbolTable(source.declaredProperties, mapper, /*mappingThisOnly*/ typeParameters.length === 1);
-                callSignatures = instantiateList(source.declaredCallSignatures, mapper, instantiateSignature);
-                constructSignatures = instantiateList(source.declaredConstructSignatures, mapper, instantiateSignature);
-                stringIndexInfo = instantiateIndexInfo(source.declaredStringIndexInfo, mapper);
-                numberIndexInfo = instantiateIndexInfo(source.declaredNumberIndexInfo, mapper);
+            return f(type) ? type : neverType;
+        }
+        // Apply a mapping function to a type and return the resulting type. If the source type
+        // is a union type, the mapping function is applied to each constituent type and a union
+        // of the resulting types is returned.
+        function mapType(type, mapper) {
+            if (!(type.flags & 65536 /* Union */)) {
+                return mapper(type);
             }
-            var baseTypes = getBaseTypes(source);
-            if (baseTypes.length) {
-                if (source.symbol && members === source.symbol.members) {
-                    members = createSymbolTable(source.declaredProperties);
-                }
-                var thisArgument = ts.lastOrUndefined(typeArguments);
-                for (var _i = 0, baseTypes_1 = baseTypes; _i < baseTypes_1.length; _i++) {
-                    var baseType = baseTypes_1[_i];
-                    var instantiatedBaseType = thisArgument ? getTypeWithThisArgument(instantiateType(baseType, mapper), thisArgument) : baseType;
-                    addInheritedMembers(members, getPropertiesOfObjectType(instantiatedBaseType));
-                    callSignatures = ts.concatenate(callSignatures, getSignaturesOfType(instantiatedBaseType, 0 /* Call */));
-                    constructSignatures = ts.concatenate(constructSignatures, getSignaturesOfType(instantiatedBaseType, 1 /* Construct */));
-                    stringIndexInfo = stringIndexInfo || getIndexInfoOfType(instantiatedBaseType, 0 /* String */);
-                    numberIndexInfo = numberIndexInfo || getIndexInfoOfType(instantiatedBaseType, 1 /* Number */);
+            var types = type.types;
+            var mappedType;
+            var mappedTypes;
+            for (var _i = 0, types_13 = types; _i < types_13.length; _i++) {
+                var current = types_13[_i];
+                var t = mapper(current);
+                if (t) {
+                    if (!mappedType) {
+                        mappedType = t;
+                    }
+                    else if (!mappedTypes) {
+                        mappedTypes = [mappedType, t];
+                    }
+                    else {
+                        mappedTypes.push(t);
+                    }
                 }
             }
-            setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+            return mappedTypes ? getUnionType(mappedTypes) : mappedType;
         }
-        function resolveClassOrInterfaceMembers(type) {
-            resolveObjectTypeMembers(type, resolveDeclaredMembers(type), emptyArray, emptyArray);
+        function extractTypesOfKind(type, kind) {
+            return filterType(type, function (t) { return (t.flags & kind) !== 0; });
+        }
+        // Return a new type in which occurrences of the string and number primitive types in
+        // typeWithPrimitives have been replaced with occurrences of string literals and numeric
+        // literals in typeWithLiterals, respectively.
+        function replacePrimitivesWithLiterals(typeWithPrimitives, typeWithLiterals) {
+            if (isTypeSubsetOf(stringType, typeWithPrimitives) && maybeTypeOfKind(typeWithLiterals, 32 /* StringLiteral */) ||
+                isTypeSubsetOf(numberType, typeWithPrimitives) && maybeTypeOfKind(typeWithLiterals, 64 /* NumberLiteral */)) {
+                return mapType(typeWithPrimitives, function (t) {
+                    return t.flags & 2 /* String */ ? extractTypesOfKind(typeWithLiterals, 2 /* String */ | 32 /* StringLiteral */) :
+                        t.flags & 4 /* Number */ ? extractTypesOfKind(typeWithLiterals, 4 /* Number */ | 64 /* NumberLiteral */) :
+                            t;
+                });
+            }
+            return typeWithPrimitives;
         }
-        function resolveTypeReferenceMembers(type) {
-            var source = resolveDeclaredMembers(type.target);
-            var typeParameters = ts.concatenate(source.typeParameters, [source.thisType]);
-            var typeArguments = type.typeArguments && type.typeArguments.length === typeParameters.length ?
-                type.typeArguments : ts.concatenate(type.typeArguments, [type]);
-            resolveObjectTypeMembers(type, source, typeParameters, typeArguments);
+        function isIncomplete(flowType) {
+            return flowType.flags === 0;
         }
-        function createSignature(declaration, typeParameters, thisParameter, parameters, resolvedReturnType, typePredicate, minArgumentCount, hasRestParameter, hasLiteralTypes) {
-            var sig = new Signature(checker);
-            sig.declaration = declaration;
-            sig.typeParameters = typeParameters;
-            sig.parameters = parameters;
-            sig.thisParameter = thisParameter;
-            sig.resolvedReturnType = resolvedReturnType;
-            sig.typePredicate = typePredicate;
-            sig.minArgumentCount = minArgumentCount;
-            sig.hasRestParameter = hasRestParameter;
-            sig.hasLiteralTypes = hasLiteralTypes;
-            return sig;
+        function getTypeFromFlowType(flowType) {
+            return flowType.flags === 0 ? flowType.type : flowType;
         }
-        function cloneSignature(sig) {
-            return createSignature(sig.declaration, sig.typeParameters, sig.thisParameter, sig.parameters, sig.resolvedReturnType, sig.typePredicate, sig.minArgumentCount, sig.hasRestParameter, sig.hasLiteralTypes);
+        function createFlowType(type, incomplete) {
+            return incomplete ? { flags: 0, type: type } : type;
         }
-        function getDefaultConstructSignatures(classType) {
-            var baseConstructorType = getBaseConstructorTypeOfClass(classType);
-            var baseSignatures = getSignaturesOfType(baseConstructorType, 1 /* Construct */);
-            if (baseSignatures.length === 0) {
-                return [createSignature(undefined, classType.localTypeParameters, undefined, emptyArray, classType, /*typePredicate*/ undefined, 0, /*hasRestParameter*/ false, /*hasLiteralTypes*/ false)];
-            }
-            var baseTypeNode = getBaseTypeNodeOfClass(classType);
-            var typeArguments = ts.map(baseTypeNode.typeArguments, getTypeFromTypeNodeNoAlias);
-            var typeArgCount = typeArguments ? typeArguments.length : 0;
-            var result = [];
-            for (var _i = 0, baseSignatures_1 = baseSignatures; _i < baseSignatures_1.length; _i++) {
-                var baseSig = baseSignatures_1[_i];
-                var typeParamCount = baseSig.typeParameters ? baseSig.typeParameters.length : 0;
-                if (typeParamCount === typeArgCount) {
-                    var sig = typeParamCount ? getSignatureInstantiation(baseSig, typeArguments) : cloneSignature(baseSig);
-                    sig.typeParameters = classType.localTypeParameters;
-                    sig.resolvedReturnType = classType;
-                    result.push(sig);
-                }
-            }
+        // An evolving array type tracks the element types that have so far been seen in an
+        // 'x.push(value)' or 'x[n] = value' operation along the control flow graph. Evolving
+        // array types are ultimately converted into manifest array types (using getFinalArrayType)
+        // and never escape the getFlowTypeOfReference function.
+        function createEvolvingArrayType(elementType) {
+            var result = createObjectType(256 /* EvolvingArray */);
+            result.elementType = elementType;
             return result;
         }
-        function findMatchingSignature(signatureList, signature, partialMatch, ignoreThisTypes, ignoreReturnTypes) {
-            for (var _i = 0, signatureList_1 = signatureList; _i < signatureList_1.length; _i++) {
-                var s = signatureList_1[_i];
-                if (compareSignaturesIdentical(s, signature, partialMatch, ignoreThisTypes, ignoreReturnTypes, compareTypesIdentical)) {
-                    return s;
-                }
+        function getEvolvingArrayType(elementType) {
+            return evolvingArrayTypes[elementType.id] || (evolvingArrayTypes[elementType.id] = createEvolvingArrayType(elementType));
+        }
+        // When adding evolving array element types we do not perform subtype reduction. Instead,
+        // we defer subtype reduction until the evolving array type is finalized into a manifest
+        // array type.
+        function addEvolvingArrayElementType(evolvingArrayType, node) {
+            var elementType = getBaseTypeOfLiteralType(getContextFreeTypeOfExpression(node));
+            return isTypeSubsetOf(elementType, evolvingArrayType.elementType) ? evolvingArrayType : getEvolvingArrayType(getUnionType([evolvingArrayType.elementType, elementType]));
+        }
+        function createFinalArrayType(elementType) {
+            return elementType.flags & 8192 /* Never */ ?
+                autoArrayType :
+                createArrayType(elementType.flags & 65536 /* Union */ ?
+                    getUnionType(elementType.types, /*subtypeReduction*/ true) :
+                    elementType);
+        }
+        // We perform subtype reduction upon obtaining the final array type from an evolving array type.
+        function getFinalArrayType(evolvingArrayType) {
+            return evolvingArrayType.finalArrayType || (evolvingArrayType.finalArrayType = createFinalArrayType(evolvingArrayType.elementType));
+        }
+        function finalizeEvolvingArrayType(type) {
+            return getObjectFlags(type) & 256 /* EvolvingArray */ ? getFinalArrayType(type) : type;
+        }
+        function getElementTypeOfEvolvingArrayType(type) {
+            return getObjectFlags(type) & 256 /* EvolvingArray */ ? type.elementType : neverType;
+        }
+        function isEvolvingArrayTypeList(types) {
+            var hasEvolvingArrayType = false;
+            for (var _i = 0, types_14 = types; _i < types_14.length; _i++) {
+                var t = types_14[_i];
+                if (!(t.flags & 8192 /* Never */)) {
+                    if (!(getObjectFlags(t) & 256 /* EvolvingArray */)) {
+                        return false;
+                    }
+                    hasEvolvingArrayType = true;
+                }
+            }
+            return hasEvolvingArrayType;
+        }
+        // At flow control branch or loop junctions, if the type along every antecedent code path
+        // is an evolving array type, we construct a combined evolving array type. Otherwise we
+        // finalize all evolving array types.
+        function getUnionOrEvolvingArrayType(types, subtypeReduction) {
+            return isEvolvingArrayTypeList(types) ?
+                getEvolvingArrayType(getUnionType(ts.map(types, getElementTypeOfEvolvingArrayType))) :
+                getUnionType(ts.sameMap(types, finalizeEvolvingArrayType), subtypeReduction);
+        }
+        // Return true if the given node is 'x' in an 'x.length', x.push(value)', 'x.unshift(value)' or
+        // 'x[n] = value' operation, where 'n' is an expression of type any, undefined, or a number-like type.
+        function isEvolvingArrayOperationTarget(node) {
+            var root = getReferenceRoot(node);
+            var parent = root.parent;
+            var isLengthPushOrUnshift = parent.kind === 179 /* PropertyAccessExpression */ && (parent.name.text === "length" ||
+                parent.parent.kind === 181 /* CallExpression */ && ts.isPushOrUnshiftIdentifier(parent.name));
+            var isElementAssignment = parent.kind === 180 /* ElementAccessExpression */ &&
+                parent.expression === root &&
+                parent.parent.kind === 194 /* BinaryExpression */ &&
+                parent.parent.operatorToken.kind === 58 /* EqualsToken */ &&
+                parent.parent.left === parent &&
+                !ts.isAssignmentTarget(parent.parent) &&
+                isTypeAnyOrAllConstituentTypesHaveKind(getTypeOfExpression(parent.argumentExpression), 84 /* NumberLike */ | 2048 /* Undefined */);
+            return isLengthPushOrUnshift || isElementAssignment;
+        }
+        function maybeTypePredicateCall(node) {
+            var links = getNodeLinks(node);
+            if (links.maybeTypePredicate === undefined) {
+                links.maybeTypePredicate = getMaybeTypePredicate(node);
             }
+            return links.maybeTypePredicate;
         }
-        function findMatchingSignatures(signatureLists, signature, listIndex) {
-            if (signature.typeParameters) {
-                // We require an exact match for generic signatures, so we only return signatures from the first
-                // signature list and only if they have exact matches in the other signature lists.
-                if (listIndex > 0) {
-                    return undefined;
+        function getMaybeTypePredicate(node) {
+            if (node.expression.kind !== 97 /* SuperKeyword */) {
+                var funcType = checkNonNullExpression(node.expression);
+                if (funcType !== silentNeverType) {
+                    var apparentType = getApparentType(funcType);
+                    if (apparentType !== unknownType) {
+                        var callSignatures = getSignaturesOfType(apparentType, 0 /* Call */);
+                        return !!ts.forEach(callSignatures, function (sig) { return sig.typePredicate; });
+                    }
                 }
-                for (var i = 1; i < signatureLists.length; i++) {
-                    if (!findMatchingSignature(signatureLists[i], signature, /*partialMatch*/ false, /*ignoreThisTypes*/ false, /*ignoreReturnTypes*/ false)) {
-                        return undefined;
+            }
+            return false;
+        }
+        function getFlowTypeOfReference(reference, declaredType, initialType, flowContainer, couldBeUninitialized) {
+            if (initialType === void 0) { initialType = declaredType; }
+            var key;
+            if (!reference.flowNode || !couldBeUninitialized && !(declaredType.flags & 17810175 /* Narrowable */)) {
+                return declaredType;
+            }
+            var visitedFlowStart = visitedFlowCount;
+            var evolvedType = getTypeFromFlowType(getTypeAtFlowNode(reference.flowNode));
+            visitedFlowCount = visitedFlowStart;
+            // When the reference is 'x' in an 'x.length', 'x.push(value)', 'x.unshift(value)' or x[n] = value' operation,
+            // we give type 'any[]' to 'x' instead of using the type determined by control flow analysis such that operations
+            // on empty arrays are possible without implicit any errors and new element types can be inferred without
+            // type mismatch errors.
+            var resultType = getObjectFlags(evolvedType) & 256 /* EvolvingArray */ && isEvolvingArrayOperationTarget(reference) ? anyArrayType : finalizeEvolvingArrayType(evolvedType);
+            if (reference.parent.kind === 203 /* NonNullExpression */ && getTypeWithFacts(resultType, 524288 /* NEUndefinedOrNull */).flags & 8192 /* Never */) {
+                return declaredType;
+            }
+            return resultType;
+            function getTypeAtFlowNode(flow) {
+                while (true) {
+                    if (flow.flags & 1024 /* Shared */) {
+                        // We cache results of flow type resolution for shared nodes that were previously visited in
+                        // the same getFlowTypeOfReference invocation. A node is considered shared when it is the
+                        // antecedent of more than one node.
+                        for (var i = visitedFlowStart; i < visitedFlowCount; i++) {
+                            if (visitedFlowNodes[i] === flow) {
+                                return visitedFlowTypes[i];
+                            }
+                        }
+                    }
+                    var type = void 0;
+                    if (flow.flags & 4096 /* AfterFinally */) {
+                        // block flow edge: finally -> pre-try (for larger explanation check comment in binder.ts - bindTryStatement
+                        flow.locked = true;
+                        type = getTypeAtFlowNode(flow.antecedent);
+                        flow.locked = false;
+                    }
+                    else if (flow.flags & 2048 /* PreFinally */) {
+                        // locked pre-finally flows are filtered out in getTypeAtFlowBranchLabel
+                        // so here just redirect to antecedent
+                        flow = flow.antecedent;
+                        continue;
+                    }
+                    else if (flow.flags & 16 /* Assignment */) {
+                        type = getTypeAtFlowAssignment(flow);
+                        if (!type) {
+                            flow = flow.antecedent;
+                            continue;
+                        }
+                    }
+                    else if (flow.flags & 96 /* Condition */) {
+                        type = getTypeAtFlowCondition(flow);
+                    }
+                    else if (flow.flags & 128 /* SwitchClause */) {
+                        type = getTypeAtSwitchClause(flow);
+                    }
+                    else if (flow.flags & 12 /* Label */) {
+                        if (flow.antecedents.length === 1) {
+                            flow = flow.antecedents[0];
+                            continue;
+                        }
+                        type = flow.flags & 4 /* BranchLabel */ ?
+                            getTypeAtFlowBranchLabel(flow) :
+                            getTypeAtFlowLoopLabel(flow);
+                    }
+                    else if (flow.flags & 256 /* ArrayMutation */) {
+                        type = getTypeAtFlowArrayMutation(flow);
+                        if (!type) {
+                            flow = flow.antecedent;
+                            continue;
+                        }
+                    }
+                    else if (flow.flags & 2 /* Start */) {
+                        // Check if we should continue with the control flow of the containing function.
+                        var container = flow.container;
+                        if (container && container !== flowContainer && reference.kind !== 179 /* PropertyAccessExpression */ && reference.kind !== 99 /* ThisKeyword */) {
+                            flow = container.flowNode;
+                            continue;
+                        }
+                        // At the top of the flow we have the initial type.
+                        type = initialType;
+                    }
+                    else {
+                        // Unreachable code errors are reported in the binding phase. Here we
+                        // simply return the non-auto declared type to reduce follow-on errors.
+                        type = convertAutoToAny(declaredType);
+                    }
+                    if (flow.flags & 1024 /* Shared */) {
+                        // Record visited node and the associated type in the cache.
+                        visitedFlowNodes[visitedFlowCount] = flow;
+                        visitedFlowTypes[visitedFlowCount] = type;
+                        visitedFlowCount++;
                     }
+                    return type;
                 }
-                return [signature];
             }
-            var result = undefined;
-            for (var i = 0; i < signatureLists.length; i++) {
-                // Allow matching non-generic signatures to have excess parameters and different return types
-                var match = i === listIndex ? signature : findMatchingSignature(signatureLists[i], signature, /*partialMatch*/ true, /*ignoreThisTypes*/ true, /*ignoreReturnTypes*/ true);
-                if (!match) {
-                    return undefined;
+            function getTypeAtFlowAssignment(flow) {
+                var node = flow.node;
+                // Assignments only narrow the computed type if the declared type is a union type. Thus, we
+                // only need to evaluate the assigned type if the declared type is a union type.
+                if (isMatchingReference(reference, node)) {
+                    if (ts.getAssignmentTargetKind(node) === 2 /* Compound */) {
+                        var flowType = getTypeAtFlowNode(flow.antecedent);
+                        return createFlowType(getBaseTypeOfLiteralType(getTypeFromFlowType(flowType)), isIncomplete(flowType));
+                    }
+                    if (declaredType === autoType || declaredType === autoArrayType) {
+                        if (isEmptyArrayAssignment(node)) {
+                            return getEvolvingArrayType(neverType);
+                        }
+                        var assignedType = getBaseTypeOfLiteralType(getInitialOrAssignedType(node));
+                        return isTypeAssignableTo(assignedType, declaredType) ? assignedType : anyArrayType;
+                    }
+                    if (declaredType.flags & 65536 /* Union */) {
+                        return getAssignmentReducedType(declaredType, getInitialOrAssignedType(node));
+                    }
+                    return declaredType;
                 }
-                if (!ts.contains(result, match)) {
-                    (result || (result = [])).push(match);
+                // We didn't have a direct match. However, if the reference is a dotted name, this
+                // may be an assignment to a left hand part of the reference. For example, for a
+                // reference 'x.y.z', we may be at an assignment to 'x.y' or 'x'. In that case,
+                // return the declared type.
+                if (containsMatchingReference(reference, node)) {
+                    return declaredType;
                 }
+                // Assignment doesn't affect reference
+                return undefined;
             }
-            return result;
-        }
-        // The signatures of a union type are those signatures that are present in each of the constituent types.
-        // Generic signatures must match exactly, but non-generic signatures are allowed to have extra optional
-        // parameters and may differ in return types. When signatures differ in return types, the resulting return
-        // type is the union of the constituent return types.
-        function getUnionSignatures(types, kind) {
-            var signatureLists = ts.map(types, function (t) { return getSignaturesOfType(t, kind); });
-            var result = undefined;
-            for (var i = 0; i < signatureLists.length; i++) {
-                for (var _i = 0, _a = signatureLists[i]; _i < _a.length; _i++) {
-                    var signature = _a[_i];
-                    // Only process signatures with parameter lists that aren't already in the result list
-                    if (!result || !findMatchingSignature(result, signature, /*partialMatch*/ false, /*ignoreThisTypes*/ true, /*ignoreReturnTypes*/ true)) {
-                        var unionSignatures = findMatchingSignatures(signatureLists, signature, i);
-                        if (unionSignatures) {
-                            var s = signature;
-                            // Union the result types when more than one signature matches
-                            if (unionSignatures.length > 1) {
-                                s = cloneSignature(signature);
-                                if (ts.forEach(unionSignatures, function (sig) { return sig.thisParameter; })) {
-                                    var thisType = getUnionType(ts.map(unionSignatures, function (sig) { return getTypeOfSymbol(sig.thisParameter) || anyType; }), /*subtypeReduction*/ true);
-                                    s.thisParameter = createTransientSymbol(signature.thisParameter, thisType);
-                                }
-                                // Clear resolved return type we possibly got from cloneSignature
-                                s.resolvedReturnType = undefined;
-                                s.unionSignatures = unionSignatures;
+            function getTypeAtFlowArrayMutation(flow) {
+                var node = flow.node;
+                var expr = node.kind === 181 /* CallExpression */ ?
+                    node.expression.expression :
+                    node.left.expression;
+                if (isMatchingReference(reference, getReferenceCandidate(expr))) {
+                    var flowType = getTypeAtFlowNode(flow.antecedent);
+                    var type = getTypeFromFlowType(flowType);
+                    if (getObjectFlags(type) & 256 /* EvolvingArray */) {
+                        var evolvedType_1 = type;
+                        if (node.kind === 181 /* CallExpression */) {
+                            for (var _i = 0, _a = node.arguments; _i < _a.length; _i++) {
+                                var arg = _a[_i];
+                                evolvedType_1 = addEvolvingArrayElementType(evolvedType_1, arg);
                             }
-                            (result || (result = [])).push(s);
                         }
+                        else {
+                            var indexType = getTypeOfExpression(node.left.argumentExpression);
+                            if (isTypeAnyOrAllConstituentTypesHaveKind(indexType, 84 /* NumberLike */ | 2048 /* Undefined */)) {
+                                evolvedType_1 = addEvolvingArrayElementType(evolvedType_1, node.right);
+                            }
+                        }
+                        return evolvedType_1 === type ? flowType : createFlowType(evolvedType_1, isIncomplete(flowType));
                     }
+                    return flowType;
                 }
+                return undefined;
             }
-            return result || emptyArray;
-        }
-        function getUnionIndexInfo(types, kind) {
-            var indexTypes = [];
-            var isAnyReadonly = false;
-            for (var _i = 0, types_1 = types; _i < types_1.length; _i++) {
-                var type = types_1[_i];
-                var indexInfo = getIndexInfoOfType(type, kind);
-                if (!indexInfo) {
-                    return undefined;
+            function getTypeAtFlowCondition(flow) {
+                var flowType = getTypeAtFlowNode(flow.antecedent);
+                var type = getTypeFromFlowType(flowType);
+                if (type.flags & 8192 /* Never */) {
+                    return flowType;
+                }
+                // If we have an antecedent type (meaning we're reachable in some way), we first
+                // attempt to narrow the antecedent type. If that produces the never type, and if
+                // the antecedent type is incomplete (i.e. a transient type in a loop), then we
+                // take the type guard as an indication that control *could* reach here once we
+                // have the complete type. We proceed by switching to the silent never type which
+                // doesn't report errors when operators are applied to it. Note that this is the
+                // *only* place a silent never type is ever generated.
+                var assumeTrue = (flow.flags & 32 /* TrueCondition */) !== 0;
+                var nonEvolvingType = finalizeEvolvingArrayType(type);
+                var narrowedType = narrowType(nonEvolvingType, flow.expression, assumeTrue);
+                if (narrowedType === nonEvolvingType) {
+                    return flowType;
+                }
+                var incomplete = isIncomplete(flowType);
+                var resultType = incomplete && narrowedType.flags & 8192 /* Never */ ? silentNeverType : narrowedType;
+                return createFlowType(resultType, incomplete);
+            }
+            function getTypeAtSwitchClause(flow) {
+                var flowType = getTypeAtFlowNode(flow.antecedent);
+                var type = getTypeFromFlowType(flowType);
+                var expr = flow.switchStatement.expression;
+                if (isMatchingReference(reference, expr)) {
+                    type = narrowTypeBySwitchOnDiscriminant(type, flow.switchStatement, flow.clauseStart, flow.clauseEnd);
                 }
-                indexTypes.push(indexInfo.type);
-                isAnyReadonly = isAnyReadonly || indexInfo.isReadonly;
+                else if (isMatchingReferenceDiscriminant(expr)) {
+                    type = narrowTypeByDiscriminant(type, expr, function (t) { return narrowTypeBySwitchOnDiscriminant(t, flow.switchStatement, flow.clauseStart, flow.clauseEnd); });
+                }
+                return createFlowType(type, isIncomplete(flowType));
             }
-            return createIndexInfo(getUnionType(indexTypes, /*subtypeReduction*/ true), isAnyReadonly);
-        }
-        function resolveUnionTypeMembers(type) {
-            // The members and properties collections are empty for union types. To get all properties of a union
-            // type use getPropertiesOfType (only the language service uses this).
-            var callSignatures = getUnionSignatures(type.types, 0 /* Call */);
-            var constructSignatures = getUnionSignatures(type.types, 1 /* Construct */);
-            var stringIndexInfo = getUnionIndexInfo(type.types, 0 /* String */);
-            var numberIndexInfo = getUnionIndexInfo(type.types, 1 /* Number */);
-            setObjectTypeMembers(type, emptySymbols, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
-        }
-        function intersectTypes(type1, type2) {
-            return !type1 ? type2 : !type2 ? type1 : getIntersectionType([type1, type2]);
-        }
-        function intersectIndexInfos(info1, info2) {
-            return !info1 ? info2 : !info2 ? info1 : createIndexInfo(getIntersectionType([info1.type, info2.type]), info1.isReadonly && info2.isReadonly);
-        }
-        function resolveIntersectionTypeMembers(type) {
-            // The members and properties collections are empty for intersection types. To get all properties of an
-            // intersection type use getPropertiesOfType (only the language service uses this).
-            var callSignatures = emptyArray;
-            var constructSignatures = emptyArray;
-            var stringIndexInfo = undefined;
-            var numberIndexInfo = undefined;
-            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                var t = _a[_i];
-                callSignatures = ts.concatenate(callSignatures, getSignaturesOfType(t, 0 /* Call */));
-                constructSignatures = ts.concatenate(constructSignatures, getSignaturesOfType(t, 1 /* Construct */));
-                stringIndexInfo = intersectIndexInfos(stringIndexInfo, getIndexInfoOfType(t, 0 /* String */));
-                numberIndexInfo = intersectIndexInfos(numberIndexInfo, getIndexInfoOfType(t, 1 /* Number */));
+            function getTypeAtFlowBranchLabel(flow) {
+                var antecedentTypes = [];
+                var subtypeReduction = false;
+                var seenIncomplete = false;
+                for (var _i = 0, _a = flow.antecedents; _i < _a.length; _i++) {
+                    var antecedent = _a[_i];
+                    if (antecedent.flags & 2048 /* PreFinally */ && antecedent.lock.locked) {
+                        // if flow correspond to branch from pre-try to finally and this branch is locked - this means that
+                        // we initially have started following the flow outside the finally block.
+                        // in this case we should ignore this branch.
+                        continue;
+                    }
+                    var flowType = getTypeAtFlowNode(antecedent);
+                    var type = getTypeFromFlowType(flowType);
+                    // If the type at a particular antecedent path is the declared type and the
+                    // reference is known to always be assigned (i.e. when declared and initial types
+                    // are the same), there is no reason to process more antecedents since the only
+                    // possible outcome is subtypes that will be removed in the final union type anyway.
+                    if (type === declaredType && declaredType === initialType) {
+                        return type;
+                    }
+                    if (!ts.contains(antecedentTypes, type)) {
+                        antecedentTypes.push(type);
+                    }
+                    // If an antecedent type is not a subset of the declared type, we need to perform
+                    // subtype reduction. This happens when a "foreign" type is injected into the control
+                    // flow using the instanceof operator or a user defined type predicate.
+                    if (!isTypeSubsetOf(type, declaredType)) {
+                        subtypeReduction = true;
+                    }
+                    if (isIncomplete(flowType)) {
+                        seenIncomplete = true;
+                    }
+                }
+                return createFlowType(getUnionOrEvolvingArrayType(antecedentTypes, subtypeReduction), seenIncomplete);
             }
-            setObjectTypeMembers(type, emptySymbols, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
-        }
-        function resolveAnonymousTypeMembers(type) {
-            var symbol = type.symbol;
-            if (type.target) {
-                var members = createInstantiatedSymbolTable(getPropertiesOfObjectType(type.target), type.mapper, /*mappingThisOnly*/ false);
-                var callSignatures = instantiateList(getSignaturesOfType(type.target, 0 /* Call */), type.mapper, instantiateSignature);
-                var constructSignatures = instantiateList(getSignaturesOfType(type.target, 1 /* Construct */), type.mapper, instantiateSignature);
-                var stringIndexInfo = instantiateIndexInfo(getIndexInfoOfType(type.target, 0 /* String */), type.mapper);
-                var numberIndexInfo = instantiateIndexInfo(getIndexInfoOfType(type.target, 1 /* Number */), type.mapper);
-                setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+            function getTypeAtFlowLoopLabel(flow) {
+                // If we have previously computed the control flow type for the reference at
+                // this flow loop junction, return the cached type.
+                var id = getFlowNodeId(flow);
+                var cache = flowLoopCaches[id] || (flowLoopCaches[id] = ts.createMap());
+                if (!key) {
+                    key = getFlowCacheKey(reference);
+                }
+                var cached = cache.get(key);
+                if (cached) {
+                    return cached;
+                }
+                // If this flow loop junction and reference are already being processed, return
+                // the union of the types computed for each branch so far, marked as incomplete.
+                // It is possible to see an empty array in cases where loops are nested and the
+                // back edge of the outer loop reaches an inner loop that is already being analyzed.
+                // In such cases we restart the analysis of the inner loop, which will then see
+                // a non-empty in-process array for the outer loop and eventually terminate because
+                // the first antecedent of a loop junction is always the non-looping control flow
+                // path that leads to the top.
+                for (var i = flowLoopStart; i < flowLoopCount; i++) {
+                    if (flowLoopNodes[i] === flow && flowLoopKeys[i] === key && flowLoopTypes[i].length) {
+                        return createFlowType(getUnionOrEvolvingArrayType(flowLoopTypes[i], /*subtypeReduction*/ false), /*incomplete*/ true);
+                    }
+                }
+                // Add the flow loop junction and reference to the in-process stack and analyze
+                // each antecedent code path.
+                var antecedentTypes = [];
+                var subtypeReduction = false;
+                var firstAntecedentType;
+                flowLoopNodes[flowLoopCount] = flow;
+                flowLoopKeys[flowLoopCount] = key;
+                flowLoopTypes[flowLoopCount] = antecedentTypes;
+                for (var _i = 0, _a = flow.antecedents; _i < _a.length; _i++) {
+                    var antecedent = _a[_i];
+                    flowLoopCount++;
+                    var flowType = getTypeAtFlowNode(antecedent);
+                    flowLoopCount--;
+                    if (!firstAntecedentType) {
+                        firstAntecedentType = flowType;
+                    }
+                    var type = getTypeFromFlowType(flowType);
+                    // If we see a value appear in the cache it is a sign that control flow  analysis
+                    // was restarted and completed by checkExpressionCached. We can simply pick up
+                    // the resulting type and bail out.
+                    var cached_1 = cache.get(key);
+                    if (cached_1) {
+                        return cached_1;
+                    }
+                    if (!ts.contains(antecedentTypes, type)) {
+                        antecedentTypes.push(type);
+                    }
+                    // If an antecedent type is not a subset of the declared type, we need to perform
+                    // subtype reduction. This happens when a "foreign" type is injected into the control
+                    // flow using the instanceof operator or a user defined type predicate.
+                    if (!isTypeSubsetOf(type, declaredType)) {
+                        subtypeReduction = true;
+                    }
+                    // If the type at a particular antecedent path is the declared type there is no
+                    // reason to process more antecedents since the only possible outcome is subtypes
+                    // that will be removed in the final union type anyway.
+                    if (type === declaredType) {
+                        break;
+                    }
+                }
+                // The result is incomplete if the first antecedent (the non-looping control flow path)
+                // is incomplete.
+                var result = getUnionOrEvolvingArrayType(antecedentTypes, subtypeReduction);
+                if (isIncomplete(firstAntecedentType)) {
+                    return createFlowType(result, /*incomplete*/ true);
+                }
+                cache.set(key, result);
+                return result;
+            }
+            function isMatchingReferenceDiscriminant(expr) {
+                return expr.kind === 179 /* PropertyAccessExpression */ &&
+                    declaredType.flags & 65536 /* Union */ &&
+                    isMatchingReference(reference, expr.expression) &&
+                    isDiscriminantProperty(declaredType, expr.name.text);
             }
-            else if (symbol.flags & 2048 /* TypeLiteral */) {
-                var members = symbol.members;
-                var callSignatures = getSignaturesOfSymbol(members["__call"]);
-                var constructSignatures = getSignaturesOfSymbol(members["__new"]);
-                var stringIndexInfo = getIndexInfoOfSymbol(symbol, 0 /* String */);
-                var numberIndexInfo = getIndexInfoOfSymbol(symbol, 1 /* Number */);
-                setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+            function narrowTypeByDiscriminant(type, propAccess, narrowType) {
+                var propName = propAccess.name.text;
+                var propType = getTypeOfPropertyOfType(type, propName);
+                var narrowedPropType = propType && narrowType(propType);
+                return propType === narrowedPropType ? type : filterType(type, function (t) { return isTypeComparableTo(getTypeOfPropertyOfType(t, propName), narrowedPropType); });
             }
-            else {
-                // Combinations of function, class, enum and module
-                var members = emptySymbols;
-                var constructSignatures = emptyArray;
-                if (symbol.flags & 1952 /* HasExports */) {
-                    members = getExportsOfSymbol(symbol);
+            function narrowTypeByTruthiness(type, expr, assumeTrue) {
+                if (isMatchingReference(reference, expr)) {
+                    return getTypeWithFacts(type, assumeTrue ? 1048576 /* Truthy */ : 2097152 /* Falsy */);
                 }
-                if (symbol.flags & 32 /* Class */) {
-                    var classType = getDeclaredTypeOfClassOrInterface(symbol);
-                    constructSignatures = getSignaturesOfSymbol(symbol.members["__constructor"]);
-                    if (!constructSignatures.length) {
-                        constructSignatures = getDefaultConstructSignatures(classType);
-                    }
-                    var baseConstructorType = getBaseConstructorTypeOfClass(classType);
-                    if (baseConstructorType.flags & 2588672 /* ObjectType */) {
-                        members = createSymbolTable(getNamedMembers(members));
-                        addInheritedMembers(members, getPropertiesOfObjectType(baseConstructorType));
-                    }
+                if (isMatchingReferenceDiscriminant(expr)) {
+                    return narrowTypeByDiscriminant(type, expr, function (t) { return getTypeWithFacts(t, assumeTrue ? 1048576 /* Truthy */ : 2097152 /* Falsy */); });
                 }
-                var numberIndexInfo = symbol.flags & 384 /* Enum */ ? enumNumberIndexInfo : undefined;
-                setObjectTypeMembers(type, members, emptyArray, constructSignatures, undefined, numberIndexInfo);
-                // We resolve the members before computing the signatures because a signature may use
-                // typeof with a qualified name expression that circularly references the type we are
-                // in the process of resolving (see issue #6072). The temporarily empty signature list
-                // will never be observed because a qualified name can't reference signatures.
-                if (symbol.flags & (16 /* Function */ | 8192 /* Method */)) {
-                    type.callSignatures = getSignaturesOfSymbol(symbol);
+                if (containsMatchingReferenceDiscriminant(reference, expr)) {
+                    return declaredType;
                 }
+                return type;
             }
-        }
-        function resolveStructuredTypeMembers(type) {
-            if (!type.members) {
-                if (type.flags & 131072 /* Reference */) {
-                    resolveTypeReferenceMembers(type);
+            function narrowTypeByBinaryExpression(type, expr, assumeTrue) {
+                switch (expr.operatorToken.kind) {
+                    case 58 /* EqualsToken */:
+                        return narrowTypeByTruthiness(type, expr.left, assumeTrue);
+                    case 32 /* EqualsEqualsToken */:
+                    case 33 /* ExclamationEqualsToken */:
+                    case 34 /* EqualsEqualsEqualsToken */:
+                    case 35 /* ExclamationEqualsEqualsToken */:
+                        var operator_1 = expr.operatorToken.kind;
+                        var left_1 = getReferenceCandidate(expr.left);
+                        var right_1 = getReferenceCandidate(expr.right);
+                        if (left_1.kind === 189 /* TypeOfExpression */ && right_1.kind === 9 /* StringLiteral */) {
+                            return narrowTypeByTypeof(type, left_1, operator_1, right_1, assumeTrue);
+                        }
+                        if (right_1.kind === 189 /* TypeOfExpression */ && left_1.kind === 9 /* StringLiteral */) {
+                            return narrowTypeByTypeof(type, right_1, operator_1, left_1, assumeTrue);
+                        }
+                        if (isMatchingReference(reference, left_1)) {
+                            return narrowTypeByEquality(type, operator_1, right_1, assumeTrue);
+                        }
+                        if (isMatchingReference(reference, right_1)) {
+                            return narrowTypeByEquality(type, operator_1, left_1, assumeTrue);
+                        }
+                        if (isMatchingReferenceDiscriminant(left_1)) {
+                            return narrowTypeByDiscriminant(type, left_1, function (t) { return narrowTypeByEquality(t, operator_1, right_1, assumeTrue); });
+                        }
+                        if (isMatchingReferenceDiscriminant(right_1)) {
+                            return narrowTypeByDiscriminant(type, right_1, function (t) { return narrowTypeByEquality(t, operator_1, left_1, assumeTrue); });
+                        }
+                        if (containsMatchingReferenceDiscriminant(reference, left_1) || containsMatchingReferenceDiscriminant(reference, right_1)) {
+                            return declaredType;
+                        }
+                        break;
+                    case 93 /* InstanceOfKeyword */:
+                        return narrowTypeByInstanceof(type, expr, assumeTrue);
+                    case 26 /* CommaToken */:
+                        return narrowType(type, expr.right, assumeTrue);
                 }
-                else if (type.flags & (32768 /* Class */ | 65536 /* Interface */)) {
-                    resolveClassOrInterfaceMembers(type);
+                return type;
+            }
+            function narrowTypeByEquality(type, operator, value, assumeTrue) {
+                if (type.flags & 1 /* Any */) {
+                    return type;
                 }
-                else if (type.flags & 2097152 /* Anonymous */) {
-                    resolveAnonymousTypeMembers(type);
+                if (operator === 33 /* ExclamationEqualsToken */ || operator === 35 /* ExclamationEqualsEqualsToken */) {
+                    assumeTrue = !assumeTrue;
                 }
-                else if (type.flags & 524288 /* Union */) {
-                    resolveUnionTypeMembers(type);
+                var valueType = getTypeOfExpression(value);
+                if (valueType.flags & 6144 /* Nullable */) {
+                    if (!strictNullChecks) {
+                        return type;
+                    }
+                    var doubleEquals = operator === 32 /* EqualsEqualsToken */ || operator === 33 /* ExclamationEqualsToken */;
+                    var facts = doubleEquals ?
+                        assumeTrue ? 65536 /* EQUndefinedOrNull */ : 524288 /* NEUndefinedOrNull */ :
+                        value.kind === 95 /* NullKeyword */ ?
+                            assumeTrue ? 32768 /* EQNull */ : 262144 /* NENull */ :
+                            assumeTrue ? 16384 /* EQUndefined */ : 131072 /* NEUndefined */;
+                    return getTypeWithFacts(type, facts);
                 }
-                else if (type.flags & 1048576 /* Intersection */) {
-                    resolveIntersectionTypeMembers(type);
+                if (type.flags & 16810497 /* NotUnionOrUnit */) {
+                    return type;
                 }
-            }
-            return type;
-        }
-        /** Return properties of an object type or an empty array for other types */
-        function getPropertiesOfObjectType(type) {
-            if (type.flags & 2588672 /* ObjectType */) {
-                return resolveStructuredTypeMembers(type).properties;
-            }
-            return emptyArray;
-        }
-        /** If the given type is an object type and that type has a property by the given name,
-         * return the symbol for that property. Otherwise return undefined. */
-        function getPropertyOfObjectType(type, name) {
-            if (type.flags & 2588672 /* ObjectType */) {
-                var resolved = resolveStructuredTypeMembers(type);
-                var symbol = resolved.members[name];
-                if (symbol && symbolIsValue(symbol)) {
-                    return symbol;
+                if (assumeTrue) {
+                    var narrowedType = filterType(type, function (t) { return areTypesComparable(t, valueType); });
+                    return narrowedType.flags & 8192 /* Never */ ? type : replacePrimitivesWithLiterals(narrowedType, valueType);
                 }
-            }
-        }
-        function getPropertiesOfUnionOrIntersectionType(type) {
-            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                var current = _a[_i];
-                for (var _b = 0, _c = getPropertiesOfType(current); _b < _c.length; _b++) {
-                    var prop = _c[_b];
-                    getUnionOrIntersectionProperty(type, prop.name);
-                }
-                // The properties of a union type are those that are present in all constituent types, so
-                // we only need to check the properties of the first type
-                if (type.flags & 524288 /* Union */) {
-                    break;
+                if (isUnitType(valueType)) {
+                    var regularType_1 = getRegularTypeOfLiteralType(valueType);
+                    return filterType(type, function (t) { return getRegularTypeOfLiteralType(t) !== regularType_1; });
                 }
+                return type;
             }
-            var props = type.resolvedProperties;
-            if (props) {
-                var result = [];
-                for (var key in props) {
-                    var prop = props[key];
-                    // We need to filter out partial properties in union types
-                    if (!(prop.flags & 268435456 /* SyntheticProperty */ && prop.isPartial)) {
-                        result.push(prop);
+            function narrowTypeByTypeof(type, typeOfExpr, operator, literal, assumeTrue) {
+                // We have '==', '!=', '====', or !==' operator with 'typeof xxx' and string literal operands
+                var target = getReferenceCandidate(typeOfExpr.expression);
+                if (!isMatchingReference(reference, target)) {
+                    // For a reference of the form 'x.y', a 'typeof x === ...' type guard resets the
+                    // narrowed type of 'y' to its declared type.
+                    if (containsMatchingReference(reference, target)) {
+                        return declaredType;
                     }
+                    return type;
                 }
-                return result;
-            }
-            return emptyArray;
-        }
-        function getPropertiesOfType(type) {
-            type = getApparentType(type);
-            return type.flags & 1572864 /* UnionOrIntersection */ ? getPropertiesOfUnionOrIntersectionType(type) : getPropertiesOfObjectType(type);
-        }
-        /**
-         * The apparent type of a type parameter is the base constraint instantiated with the type parameter
-         * as the type argument for the 'this' type.
-         */
-        function getApparentTypeOfTypeParameter(type) {
-            if (!type.resolvedApparentType) {
-                var constraintType = getConstraintOfTypeParameter(type);
-                while (constraintType && constraintType.flags & 16384 /* TypeParameter */) {
-                    constraintType = getConstraintOfTypeParameter(constraintType);
+                if (operator === 33 /* ExclamationEqualsToken */ || operator === 35 /* ExclamationEqualsEqualsToken */) {
+                    assumeTrue = !assumeTrue;
                 }
-                type.resolvedApparentType = getTypeWithThisArgument(constraintType || emptyObjectType, type);
-            }
-            return type.resolvedApparentType;
-        }
-        /**
-         * For a type parameter, return the base constraint of the type parameter. For the string, number,
-         * boolean, and symbol primitive types, return the corresponding object types. Otherwise return the
-         * type itself. Note that the apparent type of a union type is the union type itself.
-         */
-        function getApparentType(type) {
-            if (type.flags & 16384 /* TypeParameter */) {
-                type = getApparentTypeOfTypeParameter(type);
-            }
-            if (type.flags & 34 /* StringLike */) {
-                type = globalStringType;
-            }
-            else if (type.flags & 340 /* NumberLike */) {
-                type = globalNumberType;
-            }
-            else if (type.flags & 136 /* BooleanLike */) {
-                type = globalBooleanType;
-            }
-            else if (type.flags & 512 /* ESSymbol */) {
-                type = getGlobalESSymbolType();
-            }
-            return type;
-        }
-        function createUnionOrIntersectionProperty(containingType, name) {
-            var types = containingType.types;
-            var props;
-            // Flags we want to propagate to the result if they exist in all source symbols
-            var commonFlags = (containingType.flags & 1048576 /* Intersection */) ? 536870912 /* Optional */ : 0 /* None */;
-            var isReadonly = false;
-            var isPartial = false;
-            for (var _i = 0, types_2 = types; _i < types_2.length; _i++) {
-                var current = types_2[_i];
-                var type = getApparentType(current);
-                if (type !== unknownType) {
-                    var prop = getPropertyOfType(type, name);
-                    if (prop && !(getDeclarationModifierFlagsFromSymbol(prop) & (8 /* Private */ | 16 /* Protected */))) {
-                        commonFlags &= prop.flags;
-                        if (!props) {
-                            props = [prop];
-                        }
-                        else if (!ts.contains(props, prop)) {
-                            props.push(prop);
-                        }
-                        if (isReadonlySymbol(prop)) {
-                            isReadonly = true;
+                if (assumeTrue && !(type.flags & 65536 /* Union */)) {
+                    // We narrow a non-union type to an exact primitive type if the non-union type
+                    // is a supertype of that primitive type. For example, type 'any' can be narrowed
+                    // to one of the primitive types.
+                    var targetType = typeofTypesByName.get(literal.text);
+                    if (targetType) {
+                        if (isTypeSubtypeOf(targetType, type)) {
+                            return targetType;
+                        }
+                        if (type.flags & 540672 /* TypeVariable */) {
+                            var constraint = getBaseConstraintOfType(type) || anyType;
+                            if (isTypeSubtypeOf(targetType, constraint)) {
+                                return getIntersectionType([type, targetType]);
+                            }
                         }
                     }
-                    else if (containingType.flags & 524288 /* Union */) {
-                        isPartial = true;
-                    }
                 }
+                var facts = assumeTrue ?
+                    typeofEQFacts.get(literal.text) || 64 /* TypeofEQHostObject */ :
+                    typeofNEFacts.get(literal.text) || 8192 /* TypeofNEHostObject */;
+                return getTypeWithFacts(type, facts);
             }
-            if (!props) {
-                return undefined;
-            }
-            if (props.length === 1 && !isPartial) {
-                return props[0];
+            function narrowTypeBySwitchOnDiscriminant(type, switchStatement, clauseStart, clauseEnd) {
+                // We only narrow if all case expressions specify values with unit types
+                var switchTypes = getSwitchClauseTypes(switchStatement);
+                if (!switchTypes.length) {
+                    return type;
+                }
+                var clauseTypes = switchTypes.slice(clauseStart, clauseEnd);
+                var hasDefaultClause = clauseStart === clauseEnd || ts.contains(clauseTypes, neverType);
+                var discriminantType = getUnionType(clauseTypes);
+                var caseType = discriminantType.flags & 8192 /* Never */ ? neverType :
+                    replacePrimitivesWithLiterals(filterType(type, function (t) { return isTypeComparableTo(discriminantType, t); }), discriminantType);
+                if (!hasDefaultClause) {
+                    return caseType;
+                }
+                var defaultType = filterType(type, function (t) { return !(isUnitType(t) && ts.contains(switchTypes, getRegularTypeOfLiteralType(t))); });
+                return caseType.flags & 8192 /* Never */ ? defaultType : getUnionType([caseType, defaultType]);
             }
-            var propTypes = [];
-            var declarations = [];
-            var commonType = undefined;
-            var hasNonUniformType = false;
-            for (var _a = 0, props_1 = props; _a < props_1.length; _a++) {
-                var prop = props_1[_a];
-                if (prop.declarations) {
-                    ts.addRange(declarations, prop.declarations);
+            function narrowTypeByInstanceof(type, expr, assumeTrue) {
+                var left = getReferenceCandidate(expr.left);
+                if (!isMatchingReference(reference, left)) {
+                    // For a reference of the form 'x.y', an 'x instanceof T' type guard resets the
+                    // narrowed type of 'y' to its declared type.
+                    if (containsMatchingReference(reference, left)) {
+                        return declaredType;
+                    }
+                    return type;
                 }
-                var type = getTypeOfSymbol(prop);
-                if (!commonType) {
-                    commonType = type;
+                // Check that right operand is a function type with a prototype property
+                var rightType = getTypeOfExpression(expr.right);
+                if (!isTypeSubtypeOf(rightType, globalFunctionType)) {
+                    return type;
                 }
-                else if (type !== commonType) {
-                    hasNonUniformType = true;
+                var targetType;
+                var prototypeProperty = getPropertyOfType(rightType, "prototype");
+                if (prototypeProperty) {
+                    // Target type is type of the prototype property
+                    var prototypePropertyType = getTypeOfSymbol(prototypeProperty);
+                    if (!isTypeAny(prototypePropertyType)) {
+                        targetType = prototypePropertyType;
+                    }
                 }
-                propTypes.push(type);
-            }
-            var result = createSymbol(4 /* Property */ | 67108864 /* Transient */ | 268435456 /* SyntheticProperty */ | commonFlags, name);
-            result.containingType = containingType;
-            result.hasNonUniformType = hasNonUniformType;
-            result.isPartial = isPartial;
-            result.declarations = declarations;
-            result.isReadonly = isReadonly;
-            result.type = containingType.flags & 524288 /* Union */ ? getUnionType(propTypes) : getIntersectionType(propTypes);
-            return result;
-        }
-        // Return the symbol for a given property in a union or intersection type, or undefined if the property
-        // does not exist in any constituent type. Note that the returned property may only be present in some
-        // constituents, in which case the isPartial flag is set when the containing type is union type. We need
-        // these partial properties when identifying discriminant properties, but otherwise they are filtered out
-        // and do not appear to be present in the union type.
-        function getUnionOrIntersectionProperty(type, name) {
-            var properties = type.resolvedProperties || (type.resolvedProperties = ts.createMap());
-            var property = properties[name];
-            if (!property) {
-                property = createUnionOrIntersectionProperty(type, name);
-                if (property) {
-                    properties[name] = property;
+                // Don't narrow from 'any' if the target type is exactly 'Object' or 'Function'
+                if (isTypeAny(type) && (targetType === globalObjectType || targetType === globalFunctionType)) {
+                    return type;
+                }
+                if (!targetType) {
+                    // Target type is type of construct signature
+                    var constructSignatures = void 0;
+                    if (getObjectFlags(rightType) & 2 /* Interface */) {
+                        constructSignatures = resolveDeclaredMembers(rightType).declaredConstructSignatures;
+                    }
+                    else if (getObjectFlags(rightType) & 16 /* Anonymous */) {
+                        constructSignatures = getSignaturesOfType(rightType, 1 /* Construct */);
+                    }
+                    if (constructSignatures && constructSignatures.length) {
+                        targetType = getUnionType(ts.map(constructSignatures, function (signature) { return getReturnTypeOfSignature(getErasedSignature(signature)); }));
+                    }
                 }
+                if (targetType) {
+                    return getNarrowedType(type, targetType, assumeTrue, isTypeInstanceOf);
+                }
+                return type;
             }
-            return property;
-        }
-        function getPropertyOfUnionOrIntersectionType(type, name) {
-            var property = getUnionOrIntersectionProperty(type, name);
-            // We need to filter out partial properties in union types
-            return property && !(property.flags & 268435456 /* SyntheticProperty */ && property.isPartial) ? property : undefined;
-        }
-        /**
-         * Return the symbol for the property with the given name in the given type. Creates synthetic union properties when
-         * necessary, maps primitive types and type parameters are to their apparent types, and augments with properties from
-         * Object and Function as appropriate.
-         *
-         * @param type a type to look up property from
-         * @param name a name of property to look up in a given type
-         */
-        function getPropertyOfType(type, name) {
-            type = getApparentType(type);
-            if (type.flags & 2588672 /* ObjectType */) {
-                var resolved = resolveStructuredTypeMembers(type);
-                var symbol = resolved.members[name];
-                if (symbol && symbolIsValue(symbol)) {
-                    return symbol;
+            function getNarrowedType(type, candidate, assumeTrue, isRelated) {
+                if (!assumeTrue) {
+                    return filterType(type, function (t) { return !isRelated(t, candidate); });
                 }
-                if (resolved === anyFunctionType || resolved.callSignatures.length || resolved.constructSignatures.length) {
-                    var symbol_1 = getPropertyOfObjectType(globalFunctionType, name);
-                    if (symbol_1) {
-                        return symbol_1;
+                // If the current type is a union type, remove all constituents that couldn't be instances of
+                // the candidate type. If one or more constituents remain, return a union of those.
+                if (type.flags & 65536 /* Union */) {
+                    var assignableType = filterType(type, function (t) { return isRelated(t, candidate); });
+                    if (!(assignableType.flags & 8192 /* Never */)) {
+                        return assignableType;
                     }
                 }
-                return getPropertyOfObjectType(globalObjectType, name);
-            }
-            if (type.flags & 1572864 /* UnionOrIntersection */) {
-                return getPropertyOfUnionOrIntersectionType(type, name);
-            }
-            return undefined;
-        }
-        function getSignaturesOfStructuredType(type, kind) {
-            if (type.flags & 4161536 /* StructuredType */) {
-                var resolved = resolveStructuredTypeMembers(type);
-                return kind === 0 /* Call */ ? resolved.callSignatures : resolved.constructSignatures;
-            }
-            return emptyArray;
-        }
-        /**
-         * Return the signatures of the given kind in the given type. Creates synthetic union signatures when necessary and
-         * maps primitive types and type parameters are to their apparent types.
-         */
-        function getSignaturesOfType(type, kind) {
-            return getSignaturesOfStructuredType(getApparentType(type), kind);
-        }
-        function getIndexInfoOfStructuredType(type, kind) {
-            if (type.flags & 4161536 /* StructuredType */) {
-                var resolved = resolveStructuredTypeMembers(type);
-                return kind === 0 /* String */ ? resolved.stringIndexInfo : resolved.numberIndexInfo;
+                // If the candidate type is a subtype of the target type, narrow to the candidate type.
+                // Otherwise, if the target type is assignable to the candidate type, keep the target type.
+                // Otherwise, if the candidate type is assignable to the target type, narrow to the candidate
+                // type. Otherwise, the types are completely unrelated, so narrow to an intersection of the
+                // two types.
+                return isTypeSubtypeOf(candidate, type) ? candidate :
+                    isTypeAssignableTo(type, candidate) ? type :
+                        isTypeAssignableTo(candidate, type) ? candidate :
+                            getIntersectionType([type, candidate]);
             }
-        }
-        function getIndexTypeOfStructuredType(type, kind) {
-            var info = getIndexInfoOfStructuredType(type, kind);
-            return info && info.type;
-        }
-        // Return the indexing info of the given kind in the given type. Creates synthetic union index types when necessary and
-        // maps primitive types and type parameters are to their apparent types.
-        function getIndexInfoOfType(type, kind) {
-            return getIndexInfoOfStructuredType(getApparentType(type), kind);
-        }
-        // Return the index type of the given kind in the given type. Creates synthetic union index types when necessary and
-        // maps primitive types and type parameters are to their apparent types.
-        function getIndexTypeOfType(type, kind) {
-            return getIndexTypeOfStructuredType(getApparentType(type), kind);
-        }
-        function getImplicitIndexTypeOfType(type, kind) {
-            if (isObjectLiteralType(type)) {
-                var propTypes = [];
-                for (var _i = 0, _a = getPropertiesOfType(type); _i < _a.length; _i++) {
-                    var prop = _a[_i];
-                    if (kind === 0 /* String */ || isNumericLiteralName(prop.name)) {
-                        propTypes.push(getTypeOfSymbol(prop));
+            function narrowTypeByTypePredicate(type, callExpression, assumeTrue) {
+                if (!hasMatchingArgument(callExpression, reference) || !maybeTypePredicateCall(callExpression)) {
+                    return type;
+                }
+                var signature = getResolvedSignature(callExpression);
+                var predicate = signature.typePredicate;
+                if (!predicate) {
+                    return type;
+                }
+                // Don't narrow from 'any' if the predicate type is exactly 'Object' or 'Function'
+                if (isTypeAny(type) && (predicate.type === globalObjectType || predicate.type === globalFunctionType)) {
+                    return type;
+                }
+                if (ts.isIdentifierTypePredicate(predicate)) {
+                    var predicateArgument = callExpression.arguments[predicate.parameterIndex - (signature.thisParameter ? 1 : 0)];
+                    if (predicateArgument) {
+                        if (isMatchingReference(reference, predicateArgument)) {
+                            return getNarrowedType(type, predicate.type, assumeTrue, isTypeSubtypeOf);
+                        }
+                        if (containsMatchingReference(reference, predicateArgument)) {
+                            return declaredType;
+                        }
                     }
                 }
-                if (propTypes.length) {
-                    return getUnionType(propTypes, /*subtypeReduction*/ true);
+                else {
+                    var invokedExpression = ts.skipParentheses(callExpression.expression);
+                    if (invokedExpression.kind === 180 /* ElementAccessExpression */ || invokedExpression.kind === 179 /* PropertyAccessExpression */) {
+                        var accessExpression = invokedExpression;
+                        var possibleReference = ts.skipParentheses(accessExpression.expression);
+                        if (isMatchingReference(reference, possibleReference)) {
+                            return getNarrowedType(type, predicate.type, assumeTrue, isTypeSubtypeOf);
+                        }
+                        if (containsMatchingReference(reference, possibleReference)) {
+                            return declaredType;
+                        }
+                    }
                 }
+                return type;
             }
-            return undefined;
-        }
-        function getTypeParametersFromJSDocTemplate(declaration) {
-            if (declaration.flags & 1048576 /* JavaScriptFile */) {
-                var templateTag = ts.getJSDocTemplateTag(declaration);
-                if (templateTag) {
-                    return getTypeParametersFromDeclaration(templateTag.typeParameters);
+            // Narrow the given type based on the given expression having the assumed boolean value. The returned type
+            // will be a subtype or the same type as the argument.
+            function narrowType(type, expr, assumeTrue) {
+                switch (expr.kind) {
+                    case 71 /* Identifier */:
+                    case 99 /* ThisKeyword */:
+                    case 97 /* SuperKeyword */:
+                    case 179 /* PropertyAccessExpression */:
+                        return narrowTypeByTruthiness(type, expr, assumeTrue);
+                    case 181 /* CallExpression */:
+                        return narrowTypeByTypePredicate(type, expr, assumeTrue);
+                    case 185 /* ParenthesizedExpression */:
+                        return narrowType(type, expr.expression, assumeTrue);
+                    case 194 /* BinaryExpression */:
+                        return narrowTypeByBinaryExpression(type, expr, assumeTrue);
+                    case 192 /* PrefixUnaryExpression */:
+                        if (expr.operator === 51 /* ExclamationToken */) {
+                            return narrowType(type, expr.operand, !assumeTrue);
+                        }
+                        break;
                 }
+                return type;
             }
-            return undefined;
         }
-        // Return list of type parameters with duplicates removed (duplicate identifier errors are generated in the actual
-        // type checking functions).
-        function getTypeParametersFromDeclaration(typeParameterDeclarations) {
-            var result = [];
-            ts.forEach(typeParameterDeclarations, function (node) {
-                var tp = getDeclaredTypeOfTypeParameter(node.symbol);
-                if (!ts.contains(result, tp)) {
-                    result.push(tp);
+        function getTypeOfSymbolAtLocation(symbol, location) {
+            // If we have an identifier or a property access at the given location, if the location is
+            // an dotted name expression, and if the location is not an assignment target, obtain the type
+            // of the expression (which will reflect control flow analysis). If the expression indeed
+            // resolved to the given symbol, return the narrowed type.
+            if (location.kind === 71 /* Identifier */) {
+                if (ts.isRightSideOfQualifiedNameOrPropertyAccess(location)) {
+                    location = location.parent;
+                }
+                if (ts.isPartOfExpression(location) && !ts.isAssignmentTarget(location)) {
+                    var type = getTypeOfExpression(location);
+                    if (getExportSymbolOfValueSymbolIfExported(getNodeLinks(location).resolvedSymbol) === symbol) {
+                        return type;
+                    }
                 }
+            }
+            // The location isn't a reference to the given symbol, meaning we're being asked
+            // a hypothetical question of what type the symbol would have if there was a reference
+            // to it at the given location. Since we have no control flow information for the
+            // hypothetical reference (control flow information is created and attached by the
+            // binder), we simply return the declared type of the symbol.
+            return getTypeOfSymbol(symbol);
+        }
+        function getControlFlowContainer(node) {
+            return ts.findAncestor(node.parent, function (node) {
+                return ts.isFunctionLike(node) && !ts.getImmediatelyInvokedFunctionExpression(node) ||
+                    node.kind === 234 /* ModuleBlock */ ||
+                    node.kind === 265 /* SourceFile */ ||
+                    node.kind === 149 /* PropertyDeclaration */;
             });
-            return result;
         }
-        function symbolsToArray(symbols) {
-            var result = [];
-            for (var id in symbols) {
-                if (!isReservedMemberName(id)) {
-                    result.push(symbols[id]);
+        // Check if a parameter is assigned anywhere within its declaring function.
+        function isParameterAssigned(symbol) {
+            var func = ts.getRootDeclaration(symbol.valueDeclaration).parent;
+            var links = getNodeLinks(func);
+            if (!(links.flags & 4194304 /* AssignmentsMarked */)) {
+                links.flags |= 4194304 /* AssignmentsMarked */;
+                if (!hasParentWithAssignmentsMarked(func)) {
+                    markParameterAssignments(func);
                 }
             }
-            return result;
+            return symbol.isAssigned || false;
         }
-        function isJSDocOptionalParameter(node) {
-            if (node.flags & 1048576 /* JavaScriptFile */) {
-                if (node.type && node.type.kind === 268 /* JSDocOptionalType */) {
-                    return true;
-                }
-                var paramTag = ts.getCorrespondingJSDocParameterTag(node);
-                if (paramTag) {
-                    if (paramTag.isBracketed) {
-                        return true;
-                    }
-                    if (paramTag.typeExpression) {
-                        return paramTag.typeExpression.type.kind === 268 /* JSDocOptionalType */;
+        function hasParentWithAssignmentsMarked(node) {
+            return !!ts.findAncestor(node.parent, function (node) { return ts.isFunctionLike(node) && !!(getNodeLinks(node).flags & 4194304 /* AssignmentsMarked */); });
+        }
+        function markParameterAssignments(node) {
+            if (node.kind === 71 /* Identifier */) {
+                if (ts.isAssignmentTarget(node)) {
+                    var symbol = getResolvedSymbol(node);
+                    if (symbol.valueDeclaration && ts.getRootDeclaration(symbol.valueDeclaration).kind === 146 /* Parameter */) {
+                        symbol.isAssigned = true;
                     }
                 }
             }
-        }
-        function isOptionalParameter(node) {
-            if (ts.hasQuestionToken(node) || isJSDocOptionalParameter(node)) {
-                return true;
-            }
-            if (node.initializer) {
-                var signatureDeclaration = node.parent;
-                var signature = getSignatureFromDeclaration(signatureDeclaration);
-                var parameterIndex = ts.indexOf(signatureDeclaration.parameters, node);
-                ts.Debug.assert(parameterIndex >= 0);
-                return parameterIndex >= signature.minArgumentCount;
+            else {
+                ts.forEachChild(node, markParameterAssignments);
             }
-            return false;
         }
-        function createTypePredicateFromTypePredicateNode(node) {
-            if (node.parameterName.kind === 69 /* Identifier */) {
-                var parameterName = node.parameterName;
-                return {
-                    kind: 1 /* Identifier */,
-                    parameterName: parameterName ? parameterName.text : undefined,
-                    parameterIndex: parameterName ? getTypePredicateParameterIndex(node.parent.parameters, parameterName) : undefined,
-                    type: getTypeFromTypeNode(node.type)
-                };
-            }
-            else {
-                return {
-                    kind: 0 /* This */,
-                    type: getTypeFromTypeNode(node.type)
-                };
+        function isConstVariable(symbol) {
+            return symbol.flags & 3 /* Variable */ && (getDeclarationNodeFlagsFromSymbol(symbol) & 2 /* Const */) !== 0 && getTypeOfSymbol(symbol) !== autoArrayType;
+        }
+        /** remove undefined from the annotated type of a parameter when there is an initializer (that doesn't include undefined) */
+        function removeOptionalityFromDeclaredType(declaredType, declaration) {
+            var annotationIncludesUndefined = strictNullChecks &&
+                declaration.kind === 146 /* Parameter */ &&
+                declaration.initializer &&
+                getFalsyFlags(declaredType) & 2048 /* Undefined */ &&
+                !(getFalsyFlags(checkExpression(declaration.initializer)) & 2048 /* Undefined */);
+            return annotationIncludesUndefined ? getTypeWithFacts(declaredType, 131072 /* NEUndefined */) : declaredType;
+        }
+        function isApparentTypePosition(node) {
+            var parent = node.parent;
+            return parent.kind === 179 /* PropertyAccessExpression */ ||
+                parent.kind === 181 /* CallExpression */ && parent.expression === node ||
+                parent.kind === 180 /* ElementAccessExpression */ && parent.expression === node;
+        }
+        function typeHasNullableConstraint(type) {
+            return type.flags & 540672 /* TypeVariable */ && maybeTypeOfKind(getBaseConstraintOfType(type) || emptyObjectType, 6144 /* Nullable */);
+        }
+        function getDeclaredOrApparentType(symbol, node) {
+            // When a node is the left hand expression of a property access, element access, or call expression,
+            // and the type of the node includes type variables with constraints that are nullable, we fetch the
+            // apparent type of the node *before* performing control flow analysis such that narrowings apply to
+            // the constraint type.
+            var type = getTypeOfSymbol(symbol);
+            if (isApparentTypePosition(node) && forEachType(type, typeHasNullableConstraint)) {
+                return mapType(getWidenedType(type), getApparentType);
             }
+            return type;
         }
-        function getSignatureFromDeclaration(declaration) {
-            var links = getNodeLinks(declaration);
-            if (!links.resolvedSignature) {
-                var parameters = [];
-                var hasLiteralTypes = false;
-                var minArgumentCount = -1;
-                var thisParameter = undefined;
-                var hasThisParameter = void 0;
-                var isJSConstructSignature = ts.isJSDocConstructSignature(declaration);
-                // If this is a JSDoc construct signature, then skip the first parameter in the
-                // parameter list.  The first parameter represents the return type of the construct
-                // signature.
-                for (var i = isJSConstructSignature ? 1 : 0, n = declaration.parameters.length; i < n; i++) {
-                    var param = declaration.parameters[i];
-                    var paramSymbol = param.symbol;
-                    // Include parameter symbol instead of property symbol in the signature
-                    if (paramSymbol && !!(paramSymbol.flags & 4 /* Property */) && !ts.isBindingPattern(param.name)) {
-                        var resolvedSymbol = resolveName(param, paramSymbol.name, 107455 /* Value */, undefined, undefined);
-                        paramSymbol = resolvedSymbol;
-                    }
-                    if (i === 0 && paramSymbol.name === "this") {
-                        hasThisParameter = true;
-                        thisParameter = param.symbol;
-                    }
-                    else {
-                        parameters.push(paramSymbol);
+        function checkIdentifier(node) {
+            var symbol = getResolvedSymbol(node);
+            if (symbol === unknownSymbol) {
+                return unknownType;
+            }
+            // As noted in ECMAScript 6 language spec, arrow functions never have an arguments objects.
+            // Although in down-level emit of arrow function, we emit it using function expression which means that
+            // arguments objects will be bound to the inner object; emitting arrow function natively in ES6, arguments objects
+            // will be bound to non-arrow function that contain this arrow function. This results in inconsistent behavior.
+            // To avoid that we will give an error to users if they use arguments objects in arrow function so that they
+            // can explicitly bound arguments objects
+            if (symbol === argumentsSymbol) {
+                var container = ts.getContainingFunction(node);
+                if (languageVersion < 2 /* ES2015 */) {
+                    if (container.kind === 187 /* ArrowFunction */) {
+                        error(node, ts.Diagnostics.The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_standard_function_expression);
                     }
-                    if (param.type && param.type.kind === 166 /* LiteralType */) {
-                        hasLiteralTypes = true;
+                    else if (ts.hasModifier(container, 256 /* Async */)) {
+                        error(node, ts.Diagnostics.The_arguments_object_cannot_be_referenced_in_an_async_function_or_method_in_ES3_and_ES5_Consider_using_a_standard_function_or_method);
                     }
-                    if (param.initializer || param.questionToken || param.dotDotDotToken || isJSDocOptionalParameter(param)) {
-                        if (minArgumentCount < 0) {
-                            minArgumentCount = i - (hasThisParameter ? 1 : 0);
+                }
+                getNodeLinks(container).flags |= 8192 /* CaptureArguments */;
+                return getTypeOfSymbol(symbol);
+            }
+            // We should only mark aliases as referenced if there isn't a local value declaration
+            // for the symbol.
+            if (isNonLocalAlias(symbol, /*excludes*/ 107455 /* Value */) && !isInTypeQuery(node) && !isConstEnumOrConstEnumOnlyModule(resolveAlias(symbol))) {
+                markAliasSymbolAsReferenced(symbol);
+            }
+            var localOrExportSymbol = getExportSymbolOfValueSymbolIfExported(symbol);
+            if (localOrExportSymbol.flags & 32 /* Class */) {
+                var declaration_1 = localOrExportSymbol.valueDeclaration;
+                // Due to the emit for class decorators, any reference to the class from inside of the class body
+                // must instead be rewritten to point to a temporary variable to avoid issues with the double-bind
+                // behavior of class names in ES6.
+                if (declaration_1.kind === 229 /* ClassDeclaration */
+                    && ts.nodeIsDecorated(declaration_1)) {
+                    var container = ts.getContainingClass(node);
+                    while (container !== undefined) {
+                        if (container === declaration_1 && container.name !== node) {
+                            getNodeLinks(declaration_1).flags |= 8388608 /* ClassWithConstructorReference */;
+                            getNodeLinks(node).flags |= 16777216 /* ConstructorReferenceInClass */;
+                            break;
                         }
-                    }
-                    else {
-                        // If we see any required parameters, it means the prior ones were not in fact optional.
-                        minArgumentCount = -1;
+                        container = ts.getContainingClass(container);
                     }
                 }
-                // If only one accessor includes a this-type annotation, the other behaves as if it had the same type annotation
-                if ((declaration.kind === 149 /* GetAccessor */ || declaration.kind === 150 /* SetAccessor */) &&
-                    !ts.hasDynamicName(declaration) &&
-                    (!hasThisParameter || !thisParameter)) {
-                    var otherKind = declaration.kind === 149 /* GetAccessor */ ? 150 /* SetAccessor */ : 149 /* GetAccessor */;
-                    var other = ts.getDeclarationOfKind(declaration.symbol, otherKind);
-                    if (other) {
-                        thisParameter = getAnnotatedAccessorThisParameter(other);
+                else if (declaration_1.kind === 199 /* ClassExpression */) {
+                    // When we emit a class expression with static members that contain a reference
+                    // to the constructor in the initializer, we will need to substitute that
+                    // binding with an alias as the class name is not in scope.
+                    var container = ts.getThisContainer(node, /*includeArrowFunctions*/ false);
+                    while (container !== undefined) {
+                        if (container.parent === declaration_1) {
+                            if (container.kind === 149 /* PropertyDeclaration */ && ts.hasModifier(container, 32 /* Static */)) {
+                                getNodeLinks(declaration_1).flags |= 8388608 /* ClassWithConstructorReference */;
+                                getNodeLinks(node).flags |= 16777216 /* ConstructorReferenceInClass */;
+                            }
+                            break;
+                        }
+                        container = ts.getThisContainer(container, /*includeArrowFunctions*/ false);
                     }
                 }
-                if (minArgumentCount < 0) {
-                    minArgumentCount = declaration.parameters.length - (hasThisParameter ? 1 : 0);
-                }
-                if (isJSConstructSignature) {
-                    minArgumentCount--;
+            }
+            checkCollisionWithCapturedSuperVariable(node, node);
+            checkCollisionWithCapturedThisVariable(node, node);
+            checkCollisionWithCapturedNewTargetVariable(node, node);
+            checkNestedBlockScopedBinding(node, symbol);
+            var type = getDeclaredOrApparentType(localOrExportSymbol, node);
+            var declaration = localOrExportSymbol.valueDeclaration;
+            var assignmentKind = ts.getAssignmentTargetKind(node);
+            if (assignmentKind) {
+                if (!(localOrExportSymbol.flags & 3 /* Variable */)) {
+                    error(node, ts.Diagnostics.Cannot_assign_to_0_because_it_is_not_a_variable, symbolToString(symbol));
+                    return unknownType;
                 }
-                if (!thisParameter && ts.isObjectLiteralMethod(declaration)) {
-                    thisParameter = getContextualThisParameter(declaration);
+                if (isReadonlySymbol(localOrExportSymbol)) {
+                    error(node, ts.Diagnostics.Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property, symbolToString(symbol));
+                    return unknownType;
                 }
-                var classType = declaration.kind === 148 /* Constructor */ ?
-                    getDeclaredTypeOfClassOrInterface(getMergedSymbol(declaration.parent.symbol))
-                    : undefined;
-                var typeParameters = classType ? classType.localTypeParameters :
-                    declaration.typeParameters ? getTypeParametersFromDeclaration(declaration.typeParameters) :
-                        getTypeParametersFromJSDocTemplate(declaration);
-                var returnType = getSignatureReturnTypeFromDeclaration(declaration, minArgumentCount, isJSConstructSignature, classType);
-                var typePredicate = declaration.type && declaration.type.kind === 154 /* TypePredicate */ ?
-                    createTypePredicateFromTypePredicateNode(declaration.type) :
-                    undefined;
-                links.resolvedSignature = createSignature(declaration, typeParameters, thisParameter, parameters, returnType, typePredicate, minArgumentCount, ts.hasRestParameter(declaration), hasLiteralTypes);
             }
-            return links.resolvedSignature;
-        }
-        function getSignatureReturnTypeFromDeclaration(declaration, minArgumentCount, isJSConstructSignature, classType) {
-            if (isJSConstructSignature) {
-                return getTypeFromTypeNode(declaration.parameters[0].type);
-            }
-            else if (classType) {
-                return classType;
+            // We only narrow variables and parameters occurring in a non-assignment position. For all other
+            // entities we simply return the declared type.
+            if (!(localOrExportSymbol.flags & 3 /* Variable */) || assignmentKind === 1 /* Definite */ || !declaration) {
+                return type;
             }
-            else if (declaration.type) {
-                return getTypeFromTypeNode(declaration.type);
+            // The declaration container is the innermost function that encloses the declaration of the variable
+            // or parameter. The flow container is the innermost function starting with which we analyze the control
+            // flow graph to determine the control flow based type.
+            var isParameter = ts.getRootDeclaration(declaration).kind === 146 /* Parameter */;
+            var declarationContainer = getControlFlowContainer(declaration);
+            var flowContainer = getControlFlowContainer(node);
+            var isOuterVariable = flowContainer !== declarationContainer;
+            // When the control flow originates in a function expression or arrow function and we are referencing
+            // a const variable or parameter from an outer function, we extend the origin of the control flow
+            // analysis to include the immediately enclosing function.
+            while (flowContainer !== declarationContainer && (flowContainer.kind === 186 /* FunctionExpression */ ||
+                flowContainer.kind === 187 /* ArrowFunction */ || ts.isObjectLiteralOrClassExpressionMethod(flowContainer)) &&
+                (isConstVariable(localOrExportSymbol) || isParameter && !isParameterAssigned(localOrExportSymbol))) {
+                flowContainer = getControlFlowContainer(flowContainer);
             }
-            if (declaration.flags & 1048576 /* JavaScriptFile */) {
-                var type = getReturnTypeFromJSDocComment(declaration);
-                if (type && type !== unknownType) {
-                    return type;
+            // We only look for uninitialized variables in strict null checking mode, and only when we can analyze
+            // the entire control flow graph from the variable's declaration (i.e. when the flow container and
+            // declaration container are the same).
+            var assumeInitialized = isParameter || isOuterVariable ||
+                type !== autoType && type !== autoArrayType && (!strictNullChecks || (type.flags & 1 /* Any */) !== 0 || isInTypeQuery(node) || node.parent.kind === 246 /* ExportSpecifier */) ||
+                node.parent.kind === 203 /* NonNullExpression */ ||
+                ts.isInAmbientContext(declaration);
+            var initialType = assumeInitialized ? (isParameter ? removeOptionalityFromDeclaredType(type, ts.getRootDeclaration(declaration)) : type) :
+                type === autoType || type === autoArrayType ? undefinedType :
+                    getNullableType(type, 2048 /* Undefined */);
+            var flowType = getFlowTypeOfReference(node, type, initialType, flowContainer, !assumeInitialized);
+            // A variable is considered uninitialized when it is possible to analyze the entire control flow graph
+            // from declaration to use, and when the variable's declared type doesn't include undefined but the
+            // control flow based type does include undefined.
+            if (type === autoType || type === autoArrayType) {
+                if (flowType === autoType || flowType === autoArrayType) {
+                    if (noImplicitAny) {
+                        error(ts.getNameOfDeclaration(declaration), ts.Diagnostics.Variable_0_implicitly_has_type_1_in_some_locations_where_its_type_cannot_be_determined, symbolToString(symbol), typeToString(flowType));
+                        error(node, ts.Diagnostics.Variable_0_implicitly_has_an_1_type, symbolToString(symbol), typeToString(flowType));
+                    }
+                    return convertAutoToAny(flowType);
                 }
             }
-            // TypeScript 1.0 spec (April 2014):
-            // If only one accessor includes a type annotation, the other behaves as if it had the same type annotation.
-            if (declaration.kind === 149 /* GetAccessor */ && !ts.hasDynamicName(declaration)) {
-                var setter = ts.getDeclarationOfKind(declaration.symbol, 150 /* SetAccessor */);
-                return getAnnotatedAccessorType(setter);
-            }
-            if (ts.nodeIsMissing(declaration.body)) {
-                return anyType;
-            }
-        }
-        function getSignaturesOfSymbol(symbol) {
-            if (!symbol)
-                return emptyArray;
-            var result = [];
-            for (var i = 0, len = symbol.declarations.length; i < len; i++) {
-                var node = symbol.declarations[i];
-                switch (node.kind) {
-                    case 156 /* FunctionType */:
-                    case 157 /* ConstructorType */:
-                    case 220 /* FunctionDeclaration */:
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                    case 148 /* Constructor */:
-                    case 151 /* CallSignature */:
-                    case 152 /* ConstructSignature */:
-                    case 153 /* IndexSignature */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                    case 179 /* FunctionExpression */:
-                    case 180 /* ArrowFunction */:
-                    case 269 /* JSDocFunctionType */:
-                        // Don't include signature if node is the implementation of an overloaded function. A node is considered
-                        // an implementation node if it has a body and the previous node is of the same kind and immediately
-                        // precedes the implementation node (i.e. has the same parent and ends where the implementation starts).
-                        if (i > 0 && node.body) {
-                            var previous = symbol.declarations[i - 1];
-                            if (node.parent === previous.parent && node.kind === previous.kind && node.pos === previous.end) {
-                                break;
-                            }
-                        }
-                        result.push(getSignatureFromDeclaration(node));
-                }
+            else if (!assumeInitialized && !(getFalsyFlags(type) & 2048 /* Undefined */) && getFalsyFlags(flowType) & 2048 /* Undefined */) {
+                error(node, ts.Diagnostics.Variable_0_is_used_before_being_assigned, symbolToString(symbol));
+                // Return the declared type to reduce follow-on errors
+                return type;
             }
-            return result;
+            return assignmentKind ? getBaseTypeOfLiteralType(flowType) : flowType;
         }
-        function resolveExternalModuleTypeByLiteral(name) {
-            var moduleSym = resolveExternalModuleName(name, name);
-            if (moduleSym) {
-                var resolvedModuleSymbol = resolveExternalModuleSymbol(moduleSym);
-                if (resolvedModuleSymbol) {
-                    return getTypeOfSymbol(resolvedModuleSymbol);
-                }
-            }
-            return anyType;
+        function isInsideFunction(node, threshold) {
+            return !!ts.findAncestor(node, function (n) { return n === threshold ? "quit" : ts.isFunctionLike(n); });
         }
-        function getThisTypeOfSignature(signature) {
-            if (signature.thisParameter) {
-                return getTypeOfSymbol(signature.thisParameter);
+        function checkNestedBlockScopedBinding(node, symbol) {
+            if (languageVersion >= 2 /* ES2015 */ ||
+                (symbol.flags & (2 /* BlockScopedVariable */ | 32 /* Class */)) === 0 ||
+                symbol.valueDeclaration.parent.kind === 260 /* CatchClause */) {
+                return;
             }
-        }
-        function getReturnTypeOfSignature(signature) {
-            if (!signature.resolvedReturnType) {
-                if (!pushTypeResolution(signature, 3 /* ResolvedReturnType */)) {
-                    return unknownType;
-                }
-                var type = void 0;
-                if (signature.target) {
-                    type = instantiateType(getReturnTypeOfSignature(signature.target), signature.mapper);
-                }
-                else if (signature.unionSignatures) {
-                    type = getUnionType(ts.map(signature.unionSignatures, getReturnTypeOfSignature), /*subtypeReduction*/ true);
+            // 1. walk from the use site up to the declaration and check
+            // if there is anything function like between declaration and use-site (is binding/class is captured in function).
+            // 2. walk from the declaration up to the boundary of lexical environment and check
+            // if there is an iteration statement in between declaration and boundary (is binding/class declared inside iteration statement)
+            var container = ts.getEnclosingBlockScopeContainer(symbol.valueDeclaration);
+            var usedInFunction = isInsideFunction(node.parent, container);
+            var current = container;
+            var containedInIterationStatement = false;
+            while (current && !ts.nodeStartsNewLexicalEnvironment(current)) {
+                if (ts.isIterationStatement(current, /*lookInLabeledStatements*/ false)) {
+                    containedInIterationStatement = true;
+                    break;
                 }
-                else {
-                    type = getReturnTypeFromBody(signature.declaration);
+                current = current.parent;
+            }
+            if (containedInIterationStatement) {
+                if (usedInFunction) {
+                    // mark iteration statement as containing block-scoped binding captured in some function
+                    getNodeLinks(current).flags |= 65536 /* LoopWithCapturedBlockScopedBinding */;
                 }
-                if (!popTypeResolution()) {
-                    type = anyType;
-                    if (compilerOptions.noImplicitAny) {
-                        var declaration = signature.declaration;
-                        if (declaration.name) {
-                            error(declaration.name, ts.Diagnostics._0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions, ts.declarationNameToString(declaration.name));
-                        }
-                        else {
-                            error(declaration, ts.Diagnostics.Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions);
-                        }
-                    }
+                // mark variables that are declared in loop initializer and reassigned inside the body of ForStatement.
+                // if body of ForStatement will be converted to function then we'll need a extra machinery to propagate reassigned values back.
+                if (container.kind === 214 /* ForStatement */ &&
+                    ts.getAncestor(symbol.valueDeclaration, 227 /* VariableDeclarationList */).parent === container &&
+                    isAssignedInBodyOfForStatement(node, container)) {
+                    getNodeLinks(symbol.valueDeclaration).flags |= 2097152 /* NeedsLoopOutParameter */;
                 }
-                signature.resolvedReturnType = type;
+                // set 'declared inside loop' bit on the block-scoped binding
+                getNodeLinks(symbol.valueDeclaration).flags |= 262144 /* BlockScopedBindingInLoop */;
             }
-            return signature.resolvedReturnType;
-        }
-        function getRestTypeOfSignature(signature) {
-            if (signature.hasRestParameter) {
-                var type = getTypeOfSymbol(ts.lastOrUndefined(signature.parameters));
-                if (type.flags & 131072 /* Reference */ && type.target === globalArrayType) {
-                    return type.typeArguments[0];
-                }
+            if (usedInFunction) {
+                getNodeLinks(symbol.valueDeclaration).flags |= 131072 /* CapturedBlockScopedBinding */;
             }
-            return anyType;
-        }
-        function getSignatureInstantiation(signature, typeArguments) {
-            return instantiateSignature(signature, createTypeMapper(signature.typeParameters, typeArguments), /*eraseTypeParameters*/ true);
         }
-        function getErasedSignature(signature) {
-            if (!signature.typeParameters)
-                return signature;
-            if (!signature.erasedSignatureCache) {
-                signature.erasedSignatureCache = instantiateSignature(signature, createTypeEraser(signature.typeParameters), /*eraseTypeParameters*/ true);
+        function isAssignedInBodyOfForStatement(node, container) {
+            // skip parenthesized nodes
+            var current = node;
+            while (current.parent.kind === 185 /* ParenthesizedExpression */) {
+                current = current.parent;
             }
-            return signature.erasedSignatureCache;
-        }
-        function getOrCreateTypeFromSignature(signature) {
-            // There are two ways to declare a construct signature, one is by declaring a class constructor
-            // using the constructor keyword, and the other is declaring a bare construct signature in an
-            // object type literal or interface (using the new keyword). Each way of declaring a constructor
-            // will result in a different declaration kind.
-            if (!signature.isolatedSignatureType) {
-                var isConstructor = signature.declaration.kind === 148 /* Constructor */ || signature.declaration.kind === 152 /* ConstructSignature */;
-                var type = createObjectType(2097152 /* Anonymous */);
-                type.members = emptySymbols;
-                type.properties = emptyArray;
-                type.callSignatures = !isConstructor ? [signature] : emptyArray;
-                type.constructSignatures = isConstructor ? [signature] : emptyArray;
-                signature.isolatedSignatureType = type;
+            // check if node is used as LHS in some assignment expression
+            var isAssigned = false;
+            if (ts.isAssignmentTarget(current)) {
+                isAssigned = true;
             }
-            return signature.isolatedSignatureType;
-        }
-        function getIndexSymbol(symbol) {
-            return symbol.members["__index"];
+            else if ((current.parent.kind === 192 /* PrefixUnaryExpression */ || current.parent.kind === 193 /* PostfixUnaryExpression */)) {
+                var expr = current.parent;
+                isAssigned = expr.operator === 43 /* PlusPlusToken */ || expr.operator === 44 /* MinusMinusToken */;
+            }
+            if (!isAssigned) {
+                return false;
+            }
+            // at this point we know that node is the target of assignment
+            // now check that modification happens inside the statement part of the ForStatement
+            return !!ts.findAncestor(current, function (n) { return n === container ? "quit" : n === container.statement; });
         }
-        function getIndexDeclarationOfSymbol(symbol, kind) {
-            var syntaxKind = kind === 1 /* Number */ ? 130 /* NumberKeyword */ : 132 /* StringKeyword */;
-            var indexSymbol = getIndexSymbol(symbol);
-            if (indexSymbol) {
-                for (var _i = 0, _a = indexSymbol.declarations; _i < _a.length; _i++) {
-                    var decl = _a[_i];
-                    var node = decl;
-                    if (node.parameters.length === 1) {
-                        var parameter = node.parameters[0];
-                        if (parameter && parameter.type && parameter.type.kind === syntaxKind) {
-                            return node;
-                        }
-                    }
-                }
+        function captureLexicalThis(node, container) {
+            getNodeLinks(node).flags |= 2 /* LexicalThis */;
+            if (container.kind === 149 /* PropertyDeclaration */ || container.kind === 152 /* Constructor */) {
+                var classNode = container.parent;
+                getNodeLinks(classNode).flags |= 4 /* CaptureThis */;
+            }
+            else {
+                getNodeLinks(container).flags |= 4 /* CaptureThis */;
             }
-            return undefined;
         }
-        function createIndexInfo(type, isReadonly, declaration) {
-            return { type: type, isReadonly: isReadonly, declaration: declaration };
+        function findFirstSuperCall(n) {
+            if (ts.isSuperCall(n)) {
+                return n;
+            }
+            else if (ts.isFunctionLike(n)) {
+                return undefined;
+            }
+            return ts.forEachChild(n, findFirstSuperCall);
         }
-        function getIndexInfoOfSymbol(symbol, kind) {
-            var declaration = getIndexDeclarationOfSymbol(symbol, kind);
-            if (declaration) {
-                return createIndexInfo(declaration.type ? getTypeFromTypeNode(declaration.type) : anyType, (ts.getModifierFlags(declaration) & 64 /* Readonly */) !== 0, declaration);
+        /**
+         * Return a cached result if super-statement is already found.
+         * Otherwise, find a super statement in a given constructor function and cache the result in the node-links of the constructor
+         *
+         * @param constructor constructor-function to look for super statement
+         */
+        function getSuperCallInConstructor(constructor) {
+            var links = getNodeLinks(constructor);
+            // Only trying to find super-call if we haven't yet tried to find one.  Once we try, we will record the result
+            if (links.hasSuperCall === undefined) {
+                links.superCall = findFirstSuperCall(constructor.body);
+                links.hasSuperCall = links.superCall ? true : false;
             }
-            return undefined;
+            return links.superCall;
         }
-        function getConstraintDeclaration(type) {
-            return ts.getDeclarationOfKind(type.symbol, 141 /* TypeParameter */).constraint;
+        /**
+         * Check if the given class-declaration extends null then return true.
+         * Otherwise, return false
+         * @param classDecl a class declaration to check if it extends null
+         */
+        function classDeclarationExtendsNull(classDecl) {
+            var classSymbol = getSymbolOfNode(classDecl);
+            var classInstanceType = getDeclaredTypeOfSymbol(classSymbol);
+            var baseConstructorType = getBaseConstructorTypeOfClass(classInstanceType);
+            return baseConstructorType === nullWideningType;
         }
-        function hasConstraintReferenceTo(type, target) {
-            var checked;
-            while (type && !(type.flags & 268435456 /* ThisType */) && type.flags & 16384 /* TypeParameter */ && !ts.contains(checked, type)) {
-                if (type === target) {
-                    return true;
+        function checkThisBeforeSuper(node, container, diagnosticMessage) {
+            var containingClassDecl = container.parent;
+            var baseTypeNode = ts.getClassExtendsHeritageClauseElement(containingClassDecl);
+            // If a containing class does not have extends clause or the class extends null
+            // skip checking whether super statement is called before "this" accessing.
+            if (baseTypeNode && !classDeclarationExtendsNull(containingClassDecl)) {
+                var superCall = getSuperCallInConstructor(container);
+                // We should give an error in the following cases:
+                //      - No super-call
+                //      - "this" is accessing before super-call.
+                //          i.e super(this)
+                //              this.x; super();
+                // We want to make sure that super-call is done before accessing "this" so that
+                // "this" is not accessed as a parameter of the super-call.
+                if (!superCall || superCall.end > node.pos) {
+                    // In ES6, super inside constructor of class-declaration has to precede "this" accessing
+                    error(node, diagnosticMessage);
                 }
-                (checked || (checked = [])).push(type);
-                var constraintDeclaration = getConstraintDeclaration(type);
-                type = constraintDeclaration && getTypeFromTypeNode(constraintDeclaration);
             }
-            return false;
         }
-        function getConstraintOfTypeParameter(typeParameter) {
-            if (!typeParameter.constraint) {
-                if (typeParameter.target) {
-                    var targetConstraint = getConstraintOfTypeParameter(typeParameter.target);
-                    typeParameter.constraint = targetConstraint ? instantiateType(targetConstraint, typeParameter.mapper) : noConstraintType;
-                }
-                else {
-                    var constraintDeclaration = getConstraintDeclaration(typeParameter);
-                    var constraint = getTypeFromTypeNode(constraintDeclaration);
-                    if (hasConstraintReferenceTo(constraint, typeParameter)) {
-                        error(constraintDeclaration, ts.Diagnostics.Type_parameter_0_has_a_circular_constraint, typeToString(typeParameter));
-                        constraint = unknownType;
-                    }
-                    typeParameter.constraint = constraint;
-                }
+        function checkThisExpression(node) {
+            // Stop at the first arrow function so that we can
+            // tell whether 'this' needs to be captured.
+            var container = ts.getThisContainer(node, /* includeArrowFunctions */ true);
+            var needToCaptureLexicalThis = false;
+            if (container.kind === 152 /* Constructor */) {
+                checkThisBeforeSuper(node, container, ts.Diagnostics.super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class);
             }
-            return typeParameter.constraint === noConstraintType ? undefined : typeParameter.constraint;
-        }
-        function getParentSymbolOfTypeParameter(typeParameter) {
-            return getSymbolOfNode(ts.getDeclarationOfKind(typeParameter.symbol, 141 /* TypeParameter */).parent);
-        }
-        function getTypeListId(types) {
-            var result = "";
-            if (types) {
-                var length_3 = types.length;
-                var i = 0;
-                while (i < length_3) {
-                    var startId = types[i].id;
-                    var count = 1;
-                    while (i + count < length_3 && types[i + count].id === startId + count) {
-                        count++;
+            // Now skip arrow functions to get the "real" owner of 'this'.
+            if (container.kind === 187 /* ArrowFunction */) {
+                container = ts.getThisContainer(container, /* includeArrowFunctions */ false);
+                // When targeting es6, arrow function lexically bind "this" so we do not need to do the work of binding "this" in emitted code
+                needToCaptureLexicalThis = (languageVersion < 2 /* ES2015 */);
+            }
+            switch (container.kind) {
+                case 233 /* ModuleDeclaration */:
+                    error(node, ts.Diagnostics.this_cannot_be_referenced_in_a_module_or_namespace_body);
+                    // do not return here so in case if lexical this is captured - it will be reflected in flags on NodeLinks
+                    break;
+                case 232 /* EnumDeclaration */:
+                    error(node, ts.Diagnostics.this_cannot_be_referenced_in_current_location);
+                    // do not return here so in case if lexical this is captured - it will be reflected in flags on NodeLinks
+                    break;
+                case 152 /* Constructor */:
+                    if (isInConstructorArgumentInitializer(node, container)) {
+                        error(node, ts.Diagnostics.this_cannot_be_referenced_in_constructor_arguments);
+                        // do not return here so in case if lexical this is captured - it will be reflected in flags on NodeLinks
                     }
-                    if (result.length) {
-                        result += ",";
+                    break;
+                case 149 /* PropertyDeclaration */:
+                case 148 /* PropertySignature */:
+                    if (ts.getModifierFlags(container) & 32 /* Static */) {
+                        error(node, ts.Diagnostics.this_cannot_be_referenced_in_a_static_property_initializer);
+                        // do not return here so in case if lexical this is captured - it will be reflected in flags on NodeLinks
                     }
-                    result += startId;
-                    if (count > 1) {
-                        result += ":" + count;
+                    break;
+                case 144 /* ComputedPropertyName */:
+                    error(node, ts.Diagnostics.this_cannot_be_referenced_in_a_computed_property_name);
+                    break;
+            }
+            if (needToCaptureLexicalThis) {
+                captureLexicalThis(node, container);
+            }
+            if (ts.isFunctionLike(container) &&
+                (!isInParameterInitializerBeforeContainingFunction(node) || ts.getThisParameter(container))) {
+                // Note: a parameter initializer should refer to class-this unless function-this is explicitly annotated.
+                // If this is a function in a JS file, it might be a class method. Check if it's the RHS
+                // of a x.prototype.y = function [name]() { .... }
+                if (container.kind === 186 /* FunctionExpression */ &&
+                    container.parent.kind === 194 /* BinaryExpression */ &&
+                    ts.getSpecialPropertyAssignmentKind(container.parent) === 3 /* PrototypeProperty */) {
+                    // Get the 'x' of 'x.prototype.y = f' (here, 'f' is 'container')
+                    var className = container.parent // x.prototype.y = f
+                        .left // x.prototype.y
+                        .expression // x.prototype
+                        .expression; // x
+                    var classSymbol = checkExpression(className).symbol;
+                    if (classSymbol && classSymbol.members && (classSymbol.flags & 16 /* Function */)) {
+                        return getInferredClassType(classSymbol);
                     }
-                    i += count;
                 }
-            }
-            return result;
-        }
-        // This function is used to propagate certain flags when creating new object type references and union types.
-        // It is only necessary to do so if a constituent type might be the undefined type, the null type, the type
-        // of an object literal or the anyFunctionType. This is because there are operations in the type checker
-        // that care about the presence of such types at arbitrary depth in a containing type.
-        function getPropagatingFlagsOfTypes(types, excludeKinds) {
-            var result = 0;
-            for (var _i = 0, types_3 = types; _i < types_3.length; _i++) {
-                var type = types_3[_i];
-                if (!(type.flags & excludeKinds)) {
-                    result |= type.flags;
+                var thisType = getThisTypeOfDeclaration(container) || getContextualThisParameterType(container);
+                if (thisType) {
+                    return thisType;
                 }
             }
-            return result & 234881024 /* PropagatingFlags */;
-        }
-        function createTypeReference(target, typeArguments) {
-            var id = getTypeListId(typeArguments);
-            var type = target.instantiations[id];
-            if (!type) {
-                var propagatedFlags = typeArguments ? getPropagatingFlagsOfTypes(typeArguments, /*excludeKinds*/ 0) : 0;
-                var flags = 131072 /* Reference */ | propagatedFlags;
-                type = target.instantiations[id] = createObjectType(flags, target.symbol);
-                type.target = target;
-                type.typeArguments = typeArguments;
+            if (ts.isClassLike(container.parent)) {
+                var symbol = getSymbolOfNode(container.parent);
+                var type = ts.hasModifier(container, 32 /* Static */) ? getTypeOfSymbol(symbol) : getDeclaredTypeOfSymbol(symbol).thisType;
+                return getFlowTypeOfReference(node, type);
             }
-            return type;
-        }
-        function cloneTypeReference(source) {
-            var type = createObjectType(source.flags, source.symbol);
-            type.target = source.target;
-            type.typeArguments = source.typeArguments;
-            return type;
-        }
-        function getTypeReferenceArity(type) {
-            return type.target.typeParameters ? type.target.typeParameters.length : 0;
-        }
-        // Get type from reference to class or interface
-        function getTypeFromClassOrInterfaceReference(node, symbol) {
-            var type = getDeclaredTypeOfSymbol(getMergedSymbol(symbol));
-            var typeParameters = type.localTypeParameters;
-            if (typeParameters) {
-                if (!node.typeArguments || node.typeArguments.length !== typeParameters.length) {
-                    error(node, ts.Diagnostics.Generic_type_0_requires_1_type_argument_s, typeToString(type, /*enclosingDeclaration*/ undefined, 1 /* WriteArrayAsGenericType */), typeParameters.length);
-                    return unknownType;
+            if (ts.isInJavaScriptFile(node)) {
+                var type = getTypeForThisExpressionFromJSDoc(container);
+                if (type && type !== unknownType) {
+                    return type;
                 }
-                // In a type reference, the outer type parameters of the referenced class or interface are automatically
-                // supplied as type arguments and the type reference only specifies arguments for the local type parameters
-                // of the class or interface.
-                return createTypeReference(type, ts.concatenate(type.outerTypeParameters, ts.map(node.typeArguments, getTypeFromTypeNodeNoAlias)));
             }
-            if (node.typeArguments) {
-                error(node, ts.Diagnostics.Type_0_is_not_generic, typeToString(type));
-                return unknownType;
+            if (noImplicitThis) {
+                // With noImplicitThis, functions may not reference 'this' if it has type 'any'
+                error(node, ts.Diagnostics.this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation);
             }
-            return type;
+            return anyType;
         }
-        // Get type from reference to type alias. When a type alias is generic, the declared type of the type alias may include
-        // references to the type parameters of the alias. We replace those with the actual type arguments by instantiating the
-        // declared type. Instantiations are cached using the type identities of the type arguments as the key.
-        function getTypeFromTypeAliasReference(node, symbol) {
-            var type = getDeclaredTypeOfSymbol(symbol);
-            var links = getSymbolLinks(symbol);
-            var typeParameters = links.typeParameters;
-            if (typeParameters) {
-                if (!node.typeArguments || node.typeArguments.length !== typeParameters.length) {
-                    error(node, ts.Diagnostics.Generic_type_0_requires_1_type_argument_s, symbolToString(symbol), typeParameters.length);
-                    return unknownType;
+        function getTypeForThisExpressionFromJSDoc(node) {
+            var jsdocType = ts.getJSDocType(node);
+            if (jsdocType && jsdocType.kind === 279 /* JSDocFunctionType */) {
+                var jsDocFunctionType = jsdocType;
+                if (jsDocFunctionType.parameters.length > 0 && jsDocFunctionType.parameters[0].type.kind === 282 /* JSDocThisType */) {
+                    return getTypeFromTypeNode(jsDocFunctionType.parameters[0].type);
                 }
-                var typeArguments = ts.map(node.typeArguments, getTypeFromTypeNodeNoAlias);
-                var id = getTypeListId(typeArguments);
-                return links.instantiations[id] || (links.instantiations[id] = instantiateType(type, createTypeMapper(typeParameters, typeArguments)));
-            }
-            if (node.typeArguments) {
-                error(node, ts.Diagnostics.Type_0_is_not_generic, symbolToString(symbol));
-                return unknownType;
             }
-            return type;
-        }
-        // Get type from reference to named type that cannot be generic (enum or type parameter)
-        function getTypeFromNonGenericTypeReference(node, symbol) {
-            if (node.typeArguments) {
-                error(node, ts.Diagnostics.Type_0_is_not_generic, symbolToString(symbol));
-                return unknownType;
-            }
-            return getDeclaredTypeOfSymbol(symbol);
         }
-        function getTypeReferenceName(node) {
-            switch (node.kind) {
-                case 155 /* TypeReference */:
-                    return node.typeName;
-                case 267 /* JSDocTypeReference */:
-                    return node.name;
-                case 194 /* ExpressionWithTypeArguments */:
-                    // We only support expressions that are simple qualified names. For other
-                    // expressions this produces undefined.
-                    var expr = node.expression;
-                    if (ts.isEntityNameExpression(expr)) {
-                        return expr;
-                    }
-            }
-            return undefined;
+        function isInConstructorArgumentInitializer(node, constructorDecl) {
+            return !!ts.findAncestor(node, function (n) { return n === constructorDecl ? "quit" : n.kind === 146 /* Parameter */; });
         }
-        function resolveTypeReferenceName(node, typeReferenceName) {
-            if (!typeReferenceName) {
-                return unknownSymbol;
+        function checkSuperExpression(node) {
+            var isCallExpression = node.parent.kind === 181 /* CallExpression */ && node.parent.expression === node;
+            var container = ts.getSuperContainer(node, /*stopOnFunctions*/ true);
+            var needToCaptureLexicalThis = false;
+            // adjust the container reference in case if super is used inside arrow functions with arbitrarily deep nesting
+            if (!isCallExpression) {
+                while (container && container.kind === 187 /* ArrowFunction */) {
+                    container = ts.getSuperContainer(container, /*stopOnFunctions*/ true);
+                    needToCaptureLexicalThis = languageVersion < 2 /* ES2015 */;
+                }
             }
-            return resolveEntityName(typeReferenceName, 793064 /* Type */) || unknownSymbol;
-        }
-        function getTypeReferenceType(node, symbol) {
-            if (symbol === unknownSymbol) {
+            var canUseSuperExpression = isLegalUsageOfSuperExpression(container);
+            var nodeCheckFlag = 0;
+            if (!canUseSuperExpression) {
+                // issue more specific error if super is used in computed property name
+                // class A { foo() { return "1" }}
+                // class B {
+                //     [super.foo()]() {}
+                // }
+                var current = ts.findAncestor(node, function (n) { return n === container ? "quit" : n.kind === 144 /* ComputedPropertyName */; });
+                if (current && current.kind === 144 /* ComputedPropertyName */) {
+                    error(node, ts.Diagnostics.super_cannot_be_referenced_in_a_computed_property_name);
+                }
+                else if (isCallExpression) {
+                    error(node, ts.Diagnostics.Super_calls_are_not_permitted_outside_constructors_or_in_nested_functions_inside_constructors);
+                }
+                else if (!container || !container.parent || !(ts.isClassLike(container.parent) || container.parent.kind === 178 /* ObjectLiteralExpression */)) {
+                    error(node, ts.Diagnostics.super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions);
+                }
+                else {
+                    error(node, ts.Diagnostics.super_property_access_is_permitted_only_in_a_constructor_member_function_or_member_accessor_of_a_derived_class);
+                }
                 return unknownType;
             }
-            if (symbol.flags & (32 /* Class */ | 64 /* Interface */)) {
-                return getTypeFromClassOrInterfaceReference(node, symbol);
+            if (!isCallExpression && container.kind === 152 /* Constructor */) {
+                checkThisBeforeSuper(node, container, ts.Diagnostics.super_must_be_called_before_accessing_a_property_of_super_in_the_constructor_of_a_derived_class);
             }
-            if (symbol.flags & 524288 /* TypeAlias */) {
-                return getTypeFromTypeAliasReference(node, symbol);
+            if ((ts.getModifierFlags(container) & 32 /* Static */) || isCallExpression) {
+                nodeCheckFlag = 512 /* SuperStatic */;
             }
-            if (symbol.flags & 107455 /* Value */ && node.kind === 267 /* JSDocTypeReference */) {
-                // A JSDocTypeReference may have resolved to a value (as opposed to a type). In
-                // that case, the type of this reference is just the type of the value we resolved
-                // to.
-                return getTypeOfSymbol(symbol);
+            else {
+                nodeCheckFlag = 256 /* SuperInstance */;
             }
-            return getTypeFromNonGenericTypeReference(node, symbol);
-        }
-        function getTypeFromTypeReference(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                var symbol = void 0;
-                var type = void 0;
-                if (node.kind === 267 /* JSDocTypeReference */) {
-                    var typeReferenceName = getTypeReferenceName(node);
-                    symbol = resolveTypeReferenceName(node, typeReferenceName);
-                    type = getTypeReferenceType(node, symbol);
+            getNodeLinks(node).flags |= nodeCheckFlag;
+            // Due to how we emit async functions, we need to specialize the emit for an async method that contains a `super` reference.
+            // This is due to the fact that we emit the body of an async function inside of a generator function. As generator
+            // functions cannot reference `super`, we emit a helper inside of the method body, but outside of the generator. This helper
+            // uses an arrow function, which is permitted to reference `super`.
+            //
+            // There are two primary ways we can access `super` from within an async method. The first is getting the value of a property
+            // or indexed access on super, either as part of a right-hand-side expression or call expression. The second is when setting the value
+            // of a property or indexed access, either as part of an assignment expression or destructuring assignment.
+            //
+            // The simplest case is reading a value, in which case we will emit something like the following:
+            //
+            //  // ts
+            //  ...
+            //  async asyncMethod() {
+            //    let x = await super.asyncMethod();
+            //    return x;
+            //  }
+            //  ...
+            //
+            //  // js
+            //  ...
+            //  asyncMethod() {
+            //      const _super = name => super[name];
+            //      return __awaiter(this, arguments, Promise, function *() {
+            //          let x = yield _super("asyncMethod").call(this);
+            //          return x;
+            //      });
+            //  }
+            //  ...
+            //
+            // The more complex case is when we wish to assign a value, especially as part of a destructuring assignment. As both cases
+            // are legal in ES6, but also likely less frequent, we emit the same more complex helper for both scenarios:
+            //
+            //  // ts
+            //  ...
+            //  async asyncMethod(ar: Promise<any[]>) {
+            //      [super.a, super.b] = await ar;
+            //  }
+            //  ...
+            //
+            //  // js
+            //  ...
+            //  asyncMethod(ar) {
+            //      const _super = (function (geti, seti) {
+            //          const cache = Object.create(null);
+            //          return name => cache[name] || (cache[name] = { get value() { return geti(name); }, set value(v) { seti(name, v); } });
+            //      })(name => super[name], (name, value) => super[name] = value);
+            //      return __awaiter(this, arguments, Promise, function *() {
+            //          [_super("a").value, _super("b").value] = yield ar;
+            //      });
+            //  }
+            //  ...
+            //
+            // This helper creates an object with a "value" property that wraps the `super` property or indexed access for both get and set.
+            // This is required for destructuring assignments, as a call expression cannot be used as the target of a destructuring assignment
+            // while a property access can.
+            if (container.kind === 151 /* MethodDeclaration */ && ts.getModifierFlags(container) & 256 /* Async */) {
+                if (ts.isSuperProperty(node.parent) && ts.isAssignmentTarget(node.parent)) {
+                    getNodeLinks(container).flags |= 4096 /* AsyncMethodWithSuperBinding */;
                 }
                 else {
-                    // We only support expressions that are simple qualified names. For other expressions this produces undefined.
-                    var typeNameOrExpression = node.kind === 155 /* TypeReference */
-                        ? node.typeName
-                        : ts.isEntityNameExpression(node.expression)
-                            ? node.expression
-                            : undefined;
-                    symbol = typeNameOrExpression && resolveEntityName(typeNameOrExpression, 793064 /* Type */) || unknownSymbol;
-                    type = symbol === unknownSymbol ? unknownType :
-                        symbol.flags & (32 /* Class */ | 64 /* Interface */) ? getTypeFromClassOrInterfaceReference(node, symbol) :
-                            symbol.flags & 524288 /* TypeAlias */ ? getTypeFromTypeAliasReference(node, symbol) :
-                                getTypeFromNonGenericTypeReference(node, symbol);
+                    getNodeLinks(container).flags |= 2048 /* AsyncMethodWithSuper */;
                 }
-                // Cache both the resolved symbol and the resolved type. The resolved symbol is needed in when we check the
-                // type reference in checkTypeReferenceOrExpressionWithTypeArguments.
-                links.resolvedSymbol = symbol;
-                links.resolvedType = type;
             }
-            return links.resolvedType;
-        }
-        function getTypeFromTypeQueryNode(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                // TypeScript 1.0 spec (April 2014): 3.6.3
-                // The expression is processed as an identifier expression (section 4.3)
-                // or property access expression(section 4.10),
-                // the widened type(section 3.9) of which becomes the result.
-                links.resolvedType = getWidenedType(checkExpression(node.exprName));
+            if (needToCaptureLexicalThis) {
+                // call expressions are allowed only in constructors so they should always capture correct 'this'
+                // super property access expressions can also appear in arrow functions -
+                // in this case they should also use correct lexical this
+                captureLexicalThis(node.parent, container);
             }
-            return links.resolvedType;
-        }
-        function getTypeOfGlobalSymbol(symbol, arity) {
-            function getTypeDeclaration(symbol) {
-                var declarations = symbol.declarations;
-                for (var _i = 0, declarations_3 = declarations; _i < declarations_3.length; _i++) {
-                    var declaration = declarations_3[_i];
-                    switch (declaration.kind) {
-                        case 221 /* ClassDeclaration */:
-                        case 222 /* InterfaceDeclaration */:
-                        case 224 /* EnumDeclaration */:
-                            return declaration;
-                    }
+            if (container.parent.kind === 178 /* ObjectLiteralExpression */) {
+                if (languageVersion < 2 /* ES2015 */) {
+                    error(node, ts.Diagnostics.super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_higher);
+                    return unknownType;
+                }
+                else {
+                    // for object literal assume that type of 'super' is 'any'
+                    return anyType;
                 }
             }
-            if (!symbol) {
-                return arity ? emptyGenericType : emptyObjectType;
+            // at this point the only legal case for parent is ClassLikeDeclaration
+            var classLikeDeclaration = container.parent;
+            var classType = getDeclaredTypeOfSymbol(getSymbolOfNode(classLikeDeclaration));
+            var baseClassType = classType && getBaseTypes(classType)[0];
+            if (!baseClassType) {
+                if (!ts.getClassExtendsHeritageClauseElement(classLikeDeclaration)) {
+                    error(node, ts.Diagnostics.super_can_only_be_referenced_in_a_derived_class);
+                }
+                return unknownType;
             }
-            var type = getDeclaredTypeOfSymbol(symbol);
-            if (!(type.flags & 2588672 /* ObjectType */)) {
-                error(getTypeDeclaration(symbol), ts.Diagnostics.Global_type_0_must_be_a_class_or_interface_type, symbol.name);
-                return arity ? emptyGenericType : emptyObjectType;
+            if (container.kind === 152 /* Constructor */ && isInConstructorArgumentInitializer(node, container)) {
+                // issue custom error message for super property access in constructor arguments (to be aligned with old compiler)
+                error(node, ts.Diagnostics.super_cannot_be_referenced_in_constructor_arguments);
+                return unknownType;
             }
-            if ((type.typeParameters ? type.typeParameters.length : 0) !== arity) {
-                error(getTypeDeclaration(symbol), ts.Diagnostics.Global_type_0_must_have_1_type_parameter_s, symbol.name, arity);
-                return arity ? emptyGenericType : emptyObjectType;
+            return nodeCheckFlag === 512 /* SuperStatic */
+                ? getBaseConstructorTypeOfClass(classType)
+                : getTypeWithThisArgument(baseClassType, classType.thisType);
+            function isLegalUsageOfSuperExpression(container) {
+                if (!container) {
+                    return false;
+                }
+                if (isCallExpression) {
+                    // TS 1.0 SPEC (April 2014): 4.8.1
+                    // Super calls are only permitted in constructors of derived classes
+                    return container.kind === 152 /* Constructor */;
+                }
+                else {
+                    // TS 1.0 SPEC (April 2014)
+                    // 'super' property access is allowed
+                    // - In a constructor, instance member function, instance member accessor, or instance member variable initializer where this references a derived class instance
+                    // - In a static member function or static member accessor
+                    // topmost container must be something that is directly nested in the class declaration\object literal expression
+                    if (ts.isClassLike(container.parent) || container.parent.kind === 178 /* ObjectLiteralExpression */) {
+                        if (ts.getModifierFlags(container) & 32 /* Static */) {
+                            return container.kind === 151 /* MethodDeclaration */ ||
+                                container.kind === 150 /* MethodSignature */ ||
+                                container.kind === 153 /* GetAccessor */ ||
+                                container.kind === 154 /* SetAccessor */;
+                        }
+                        else {
+                            return container.kind === 151 /* MethodDeclaration */ ||
+                                container.kind === 150 /* MethodSignature */ ||
+                                container.kind === 153 /* GetAccessor */ ||
+                                container.kind === 154 /* SetAccessor */ ||
+                                container.kind === 149 /* PropertyDeclaration */ ||
+                                container.kind === 148 /* PropertySignature */ ||
+                                container.kind === 152 /* Constructor */;
+                        }
+                    }
+                }
+                return false;
             }
-            return type;
-        }
-        function getGlobalValueSymbol(name) {
-            return getGlobalSymbol(name, 107455 /* Value */, ts.Diagnostics.Cannot_find_global_value_0);
-        }
-        function getGlobalTypeSymbol(name) {
-            return getGlobalSymbol(name, 793064 /* Type */, ts.Diagnostics.Cannot_find_global_type_0);
-        }
-        function getGlobalSymbol(name, meaning, diagnostic) {
-            return resolveName(undefined, name, meaning, diagnostic, name);
-        }
-        function getGlobalType(name, arity) {
-            if (arity === void 0) { arity = 0; }
-            return getTypeOfGlobalSymbol(getGlobalTypeSymbol(name), arity);
-        }
-        /**
-         * Returns a type that is inside a namespace at the global scope, e.g.
-         * getExportedTypeFromNamespace('JSX', 'Element') returns the JSX.Element type
-         */
-        function getExportedTypeFromNamespace(namespace, name) {
-            var namespaceSymbol = getGlobalSymbol(namespace, 1920 /* Namespace */, /*diagnosticMessage*/ undefined);
-            var typeSymbol = namespaceSymbol && getSymbol(namespaceSymbol.exports, name, 793064 /* Type */);
-            return typeSymbol && getDeclaredTypeOfSymbol(typeSymbol);
-        }
-        /**
-          * Creates a TypeReference for a generic `TypedPropertyDescriptor<T>`.
-          */
-        function createTypedPropertyDescriptorType(propertyType) {
-            var globalTypedPropertyDescriptorType = getGlobalTypedPropertyDescriptorType();
-            return globalTypedPropertyDescriptorType !== emptyGenericType
-                ? createTypeReference(globalTypedPropertyDescriptorType, [propertyType])
-                : emptyObjectType;
-        }
-        /**
-         * Instantiates a global type that is generic with some element type, and returns that instantiation.
-         */
-        function createTypeFromGenericGlobalType(genericGlobalType, typeArguments) {
-            return genericGlobalType !== emptyGenericType ? createTypeReference(genericGlobalType, typeArguments) : emptyObjectType;
         }
-        function createIterableType(elementType) {
-            return createTypeFromGenericGlobalType(getGlobalIterableType(), [elementType]);
+        function getContainingObjectLiteral(func) {
+            return (func.kind === 151 /* MethodDeclaration */ ||
+                func.kind === 153 /* GetAccessor */ ||
+                func.kind === 154 /* SetAccessor */) && func.parent.kind === 178 /* ObjectLiteralExpression */ ? func.parent :
+                func.kind === 186 /* FunctionExpression */ && func.parent.kind === 261 /* PropertyAssignment */ ? func.parent.parent :
+                    undefined;
         }
-        function createIterableIteratorType(elementType) {
-            return createTypeFromGenericGlobalType(getGlobalIterableIteratorType(), [elementType]);
+        function getThisTypeArgument(type) {
+            return getObjectFlags(type) & 4 /* Reference */ && type.target === globalThisType ? type.typeArguments[0] : undefined;
         }
-        function createArrayType(elementType) {
-            return createTypeFromGenericGlobalType(globalArrayType, [elementType]);
+        function getThisTypeFromContextualType(type) {
+            return mapType(type, function (t) {
+                return t.flags & 131072 /* Intersection */ ? ts.forEach(t.types, getThisTypeArgument) : getThisTypeArgument(t);
+            });
         }
-        function getTypeFromArrayTypeNode(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                links.resolvedType = createArrayType(getTypeFromTypeNode(node.elementType));
+        function getContextualThisParameterType(func) {
+            if (func.kind === 187 /* ArrowFunction */) {
+                return undefined;
             }
-            return links.resolvedType;
-        }
-        // We represent tuple types as type references to synthesized generic interface types created by
-        // this function. The types are of the form:
-        //
-        //   interface Tuple<T0, T1, T2, ...> extends Array<T0 | T1 | T2 | ...> { 0: T0, 1: T1, 2: T2, ... }
-        //
-        // Note that the generic type created by this function has no symbol associated with it. The same
-        // is true for each of the synthesized type parameters.
-        function createTupleTypeOfArity(arity) {
-            var typeParameters = [];
-            var properties = [];
-            for (var i = 0; i < arity; i++) {
-                var typeParameter = createType(16384 /* TypeParameter */);
-                typeParameters.push(typeParameter);
-                var property = createSymbol(4 /* Property */ | 67108864 /* Transient */, "" + i);
-                property.type = typeParameter;
-                properties.push(property);
+            if (isContextSensitiveFunctionOrObjectLiteralMethod(func)) {
+                var contextualSignature = getContextualSignature(func);
+                if (contextualSignature) {
+                    var thisParameter = contextualSignature.thisParameter;
+                    if (thisParameter) {
+                        return getTypeOfSymbol(thisParameter);
+                    }
+                }
+            }
+            if (noImplicitThis) {
+                var containingLiteral = getContainingObjectLiteral(func);
+                if (containingLiteral) {
+                    // We have an object literal method. Check if the containing object literal has a contextual type
+                    // that includes a ThisType<T>. If so, T is the contextual type for 'this'. We continue looking in
+                    // any directly enclosing object literals.
+                    var contextualType = getApparentTypeOfContextualType(containingLiteral);
+                    var literal = containingLiteral;
+                    var type = contextualType;
+                    while (type) {
+                        var thisType = getThisTypeFromContextualType(type);
+                        if (thisType) {
+                            return instantiateType(thisType, getContextualMapper(containingLiteral));
+                        }
+                        if (literal.parent.kind !== 261 /* PropertyAssignment */) {
+                            break;
+                        }
+                        literal = literal.parent.parent;
+                        type = getApparentTypeOfContextualType(literal);
+                    }
+                    // There was no contextual ThisType<T> for the containing object literal, so the contextual type
+                    // for 'this' is the non-null form of the contextual type for the containing object literal or
+                    // the type of the object literal itself.
+                    return contextualType ? getNonNullableType(contextualType) : checkExpressionCached(containingLiteral);
+                }
+                // In an assignment of the form 'obj.xxx = function(...)' or 'obj[xxx] = function(...)', the
+                // contextual type for 'this' is 'obj'.
+                if (func.parent.kind === 194 /* BinaryExpression */ && func.parent.operatorToken.kind === 58 /* EqualsToken */) {
+                    var target = func.parent.left;
+                    if (target.kind === 179 /* PropertyAccessExpression */ || target.kind === 180 /* ElementAccessExpression */) {
+                        return checkExpressionCached(target.expression);
+                    }
+                }
             }
-            var type = createObjectType(262144 /* Tuple */ | 131072 /* Reference */);
-            type.typeParameters = typeParameters;
-            type.outerTypeParameters = undefined;
-            type.localTypeParameters = typeParameters;
-            type.instantiations = ts.createMap();
-            type.instantiations[getTypeListId(type.typeParameters)] = type;
-            type.target = type;
-            type.typeArguments = type.typeParameters;
-            type.thisType = createType(16384 /* TypeParameter */ | 268435456 /* ThisType */);
-            type.thisType.constraint = type;
-            type.declaredProperties = properties;
-            type.declaredCallSignatures = emptyArray;
-            type.declaredConstructSignatures = emptyArray;
-            type.declaredStringIndexInfo = undefined;
-            type.declaredNumberIndexInfo = undefined;
-            return type;
-        }
-        function getTupleTypeOfArity(arity) {
-            return tupleTypes[arity] || (tupleTypes[arity] = createTupleTypeOfArity(arity));
-        }
-        function createTupleType(elementTypes) {
-            return createTypeReference(getTupleTypeOfArity(elementTypes.length), elementTypes);
+            return undefined;
         }
-        function getTypeFromTupleTypeNode(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                links.resolvedType = createTupleType(ts.map(node.elementTypes, getTypeFromTypeNodeNoAlias));
+        // Return contextual type of parameter or undefined if no contextual type is available
+        function getContextuallyTypedParameterType(parameter) {
+            var func = parameter.parent;
+            if (isContextSensitiveFunctionOrObjectLiteralMethod(func)) {
+                var iife = ts.getImmediatelyInvokedFunctionExpression(func);
+                if (iife && iife.arguments) {
+                    var indexOfParameter = ts.indexOf(func.parameters, parameter);
+                    if (parameter.dotDotDotToken) {
+                        var restTypes = [];
+                        for (var i = indexOfParameter; i < iife.arguments.length; i++) {
+                            restTypes.push(getWidenedLiteralType(checkExpression(iife.arguments[i])));
+                        }
+                        return restTypes.length ? createArrayType(getUnionType(restTypes)) : undefined;
+                    }
+                    var links = getNodeLinks(iife);
+                    var cached = links.resolvedSignature;
+                    links.resolvedSignature = anySignature;
+                    var type = indexOfParameter < iife.arguments.length ?
+                        getWidenedLiteralType(checkExpression(iife.arguments[indexOfParameter])) :
+                        parameter.initializer ? undefined : undefinedWideningType;
+                    links.resolvedSignature = cached;
+                    return type;
+                }
+                var contextualSignature = getContextualSignature(func);
+                if (contextualSignature) {
+                    var funcHasRestParameters = ts.hasRestParameter(func);
+                    var len = func.parameters.length - (funcHasRestParameters ? 1 : 0);
+                    var indexOfParameter = ts.indexOf(func.parameters, parameter);
+                    if (indexOfParameter < len) {
+                        return getTypeAtPosition(contextualSignature, indexOfParameter);
+                    }
+                    // If last parameter is contextually rest parameter get its type
+                    if (funcHasRestParameters &&
+                        indexOfParameter === (func.parameters.length - 1) &&
+                        isRestParameterIndex(contextualSignature, func.parameters.length - 1)) {
+                        return getTypeOfSymbol(ts.lastOrUndefined(contextualSignature.parameters));
+                    }
+                }
             }
-            return links.resolvedType;
+            return undefined;
         }
-        function binarySearchTypes(types, type) {
-            var low = 0;
-            var high = types.length - 1;
-            var typeId = type.id;
-            while (low <= high) {
-                var middle = low + ((high - low) >> 1);
-                var id = types[middle].id;
-                if (id === typeId) {
-                    return middle;
+        // In a variable, parameter or property declaration with a type annotation,
+        //   the contextual type of an initializer expression is the type of the variable, parameter or property.
+        // Otherwise, in a parameter declaration of a contextually typed function expression,
+        //   the contextual type of an initializer expression is the contextual type of the parameter.
+        // Otherwise, in a variable or parameter declaration with a binding pattern name,
+        //   the contextual type of an initializer expression is the type implied by the binding pattern.
+        // Otherwise, in a binding pattern inside a variable or parameter declaration,
+        //   the contextual type of an initializer expression is the type annotation of the containing declaration, if present.
+        function getContextualTypeForInitializerExpression(node) {
+            var declaration = node.parent;
+            if (node === declaration.initializer) {
+                var typeNode = ts.getEffectiveTypeAnnotationNode(declaration);
+                if (typeNode) {
+                    return getTypeFromTypeNode(typeNode);
                 }
-                else if (id > typeId) {
-                    high = middle - 1;
+                if (ts.isInJavaScriptFile(declaration)) {
+                    var jsDocType = getTypeForDeclarationFromJSDocComment(declaration);
+                    if (jsDocType) {
+                        return jsDocType;
+                    }
                 }
-                else {
-                    low = middle + 1;
+                if (declaration.kind === 146 /* Parameter */) {
+                    var type = getContextuallyTypedParameterType(declaration);
+                    if (type) {
+                        return type;
+                    }
                 }
-            }
-            return ~low;
-        }
-        function containsType(types, type) {
-            return binarySearchTypes(types, type) >= 0;
-        }
-        function addTypeToUnion(typeSet, type) {
-            var flags = type.flags;
-            if (flags & 524288 /* Union */) {
-                addTypesToUnion(typeSet, type.types);
-            }
-            else if (flags & 1 /* Any */) {
-                typeSet.containsAny = true;
-            }
-            else if (!strictNullChecks && flags & 6144 /* Nullable */) {
-                if (flags & 2048 /* Undefined */)
-                    typeSet.containsUndefined = true;
-                if (flags & 4096 /* Null */)
-                    typeSet.containsNull = true;
-                if (!(flags & 33554432 /* ContainsWideningType */))
-                    typeSet.containsNonWideningType = true;
-            }
-            else if (!(flags & 8192 /* Never */)) {
-                if (flags & 2 /* String */)
-                    typeSet.containsString = true;
-                if (flags & 4 /* Number */)
-                    typeSet.containsNumber = true;
-                if (flags & 96 /* StringOrNumberLiteral */)
-                    typeSet.containsStringOrNumberLiteral = true;
-                var len = typeSet.length;
-                var index = len && type.id > typeSet[len - 1].id ? ~len : binarySearchTypes(typeSet, type);
-                if (index < 0) {
-                    if (!(flags & 2097152 /* Anonymous */ && type.symbol && type.symbol.flags & (16 /* Function */ | 8192 /* Method */) && containsIdenticalType(typeSet, type))) {
-                        typeSet.splice(~index, 0, type);
+                if (ts.isBindingPattern(declaration.name)) {
+                    return getTypeFromBindingPattern(declaration.name, /*includePatternInType*/ true, /*reportErrors*/ false);
+                }
+                if (ts.isBindingPattern(declaration.parent)) {
+                    var parentDeclaration = declaration.parent.parent;
+                    var name_21 = declaration.propertyName || declaration.name;
+                    if (parentDeclaration.kind !== 176 /* BindingElement */) {
+                        var parentTypeNode = ts.getEffectiveTypeAnnotationNode(parentDeclaration);
+                        if (parentTypeNode && !ts.isBindingPattern(name_21)) {
+                            var text = ts.getTextOfPropertyName(name_21);
+                            if (text) {
+                                return getTypeOfPropertyOfType(getTypeFromTypeNode(parentTypeNode), text);
+                            }
+                        }
                     }
                 }
             }
+            return undefined;
         }
-        // Add the given types to the given type set. Order is preserved, duplicates are removed,
-        // and nested types of the given kind are flattened into the set.
-        function addTypesToUnion(typeSet, types) {
-            for (var _i = 0, types_4 = types; _i < types_4.length; _i++) {
-                var type = types_4[_i];
-                addTypeToUnion(typeSet, type);
+        function getContextualTypeForReturnExpression(node) {
+            var func = ts.getContainingFunction(node);
+            if (func) {
+                var functionFlags = ts.getFunctionFlags(func);
+                if (functionFlags & 1 /* Generator */) {
+                    return undefined;
+                }
+                var contextualReturnType = getContextualReturnType(func);
+                return functionFlags & 2 /* Async */
+                    ? contextualReturnType && getAwaitedTypeOfPromise(contextualReturnType) // Async function
+                    : contextualReturnType; // Regular function
             }
+            return undefined;
         }
-        function containsIdenticalType(types, type) {
-            for (var _i = 0, types_5 = types; _i < types_5.length; _i++) {
-                var t = types_5[_i];
-                if (isTypeIdenticalTo(t, type)) {
-                    return true;
+        function getContextualTypeForYieldOperand(node) {
+            var func = ts.getContainingFunction(node);
+            if (func) {
+                var functionFlags = ts.getFunctionFlags(func);
+                var contextualReturnType = getContextualReturnType(func);
+                if (contextualReturnType) {
+                    return node.asteriskToken
+                        ? contextualReturnType
+                        : getIteratedTypeOfGenerator(contextualReturnType, (functionFlags & 2 /* Async */) !== 0);
                 }
             }
-            return false;
+            return undefined;
         }
-        function isSubtypeOfAny(candidate, types) {
-            for (var i = 0, len = types.length; i < len; i++) {
-                if (candidate !== types[i] && isTypeSubtypeOf(candidate, types[i])) {
+        function isInParameterInitializerBeforeContainingFunction(node) {
+            while (node.parent && !ts.isFunctionLike(node.parent)) {
+                if (node.parent.kind === 146 /* Parameter */ && node.parent.initializer === node) {
                     return true;
                 }
+                node = node.parent;
             }
             return false;
         }
-        function removeSubtypes(types) {
-            var i = types.length;
-            while (i > 0) {
-                i--;
-                if (isSubtypeOfAny(types[i], types)) {
-                    ts.orderedRemoveItemAt(types, i);
-                }
+        function getContextualReturnType(functionDecl) {
+            // If the containing function has a return type annotation, is a constructor, or is a get accessor whose
+            // corresponding set accessor has a type annotation, return statements in the function are contextually typed
+            if (functionDecl.kind === 152 /* Constructor */ ||
+                ts.getEffectiveReturnTypeNode(functionDecl) ||
+                isGetAccessorWithAnnotatedSetAccessor(functionDecl)) {
+                return getReturnTypeOfSignature(getSignatureFromDeclaration(functionDecl));
             }
-        }
-        function removeRedundantLiteralTypes(types) {
-            var i = types.length;
-            while (i > 0) {
-                i--;
-                var t = types[i];
-                var remove = t.flags & 32 /* StringLiteral */ && types.containsString ||
-                    t.flags & 64 /* NumberLiteral */ && types.containsNumber ||
-                    t.flags & 96 /* StringOrNumberLiteral */ && t.flags & 16777216 /* FreshLiteral */ && containsType(types, t.regularType);
-                if (remove) {
-                    ts.orderedRemoveItemAt(types, i);
-                }
+            // Otherwise, if the containing function is contextually typed by a function type with exactly one call signature
+            // and that call signature is non-generic, return statements are contextually typed by the return type of the signature
+            var signature = getContextualSignatureForFunctionLikeDeclaration(functionDecl);
+            if (signature) {
+                return getReturnTypeOfSignature(signature);
             }
+            return undefined;
         }
-        // We sort and deduplicate the constituent types based on object identity. If the subtypeReduction
-        // flag is specified we also reduce the constituent type set to only include types that aren't subtypes
-        // of other types. Subtype reduction is expensive for large union types and is possible only when union
-        // types are known not to circularly reference themselves (as is the case with union types created by
-        // expression constructs such as array literals and the || and ?: operators). Named types can
-        // circularly reference themselves and therefore cannot be subtype reduced during their declaration.
-        // For example, "type Item = string | (() => Item" is a named type that circularly references itself.
-        function getUnionType(types, subtypeReduction, aliasSymbol, aliasTypeArguments) {
-            if (types.length === 0) {
-                return neverType;
-            }
-            if (types.length === 1) {
-                return types[0];
+        // In a typed function call, an argument or substitution expression is contextually typed by the type of the corresponding parameter.
+        function getContextualTypeForArgument(callTarget, arg) {
+            var args = getEffectiveCallArguments(callTarget);
+            var argIndex = ts.indexOf(args, arg);
+            if (argIndex >= 0) {
+                var signature = getResolvedOrAnySignature(callTarget);
+                return getTypeAtPosition(signature, argIndex);
             }
-            var typeSet = [];
-            addTypesToUnion(typeSet, types);
-            if (typeSet.containsAny) {
-                return anyType;
+            return undefined;
+        }
+        function getContextualTypeForSubstitutionExpression(template, substitutionExpression) {
+            if (template.parent.kind === 183 /* TaggedTemplateExpression */) {
+                return getContextualTypeForArgument(template.parent, substitutionExpression);
             }
-            if (subtypeReduction) {
-                removeSubtypes(typeSet);
+            return undefined;
+        }
+        function getContextualTypeForBinaryOperand(node) {
+            var binaryExpression = node.parent;
+            var operator = binaryExpression.operatorToken.kind;
+            if (ts.isAssignmentOperator(operator)) {
+                // Don't do this for special property assignments to avoid circularity
+                if (ts.getSpecialPropertyAssignmentKind(binaryExpression) !== 0 /* None */) {
+                    return undefined;
+                }
+                // In an assignment expression, the right operand is contextually typed by the type of the left operand.
+                if (node === binaryExpression.right) {
+                    return getTypeOfExpression(binaryExpression.left);
+                }
             }
-            else if (typeSet.containsStringOrNumberLiteral) {
-                removeRedundantLiteralTypes(typeSet);
+            else if (operator === 54 /* BarBarToken */) {
+                // When an || expression has a contextual type, the operands are contextually typed by that type. When an ||
+                // expression has no contextual type, the right operand is contextually typed by the type of the left operand.
+                var type = getContextualType(binaryExpression);
+                if (!type && node === binaryExpression.right) {
+                    type = getTypeOfExpression(binaryExpression.left);
+                }
+                return type;
             }
-            if (typeSet.length === 0) {
-                return typeSet.containsNull ? typeSet.containsNonWideningType ? nullType : nullWideningType :
-                    typeSet.containsUndefined ? typeSet.containsNonWideningType ? undefinedType : undefinedWideningType :
-                        neverType;
+            else if (operator === 53 /* AmpersandAmpersandToken */ || operator === 26 /* CommaToken */) {
+                if (node === binaryExpression.right) {
+                    return getContextualType(binaryExpression);
+                }
             }
-            return getUnionTypeFromSortedList(typeSet, aliasSymbol, aliasTypeArguments);
+            return undefined;
         }
-        // This function assumes the constituent type list is sorted and deduplicated.
-        function getUnionTypeFromSortedList(types, aliasSymbol, aliasTypeArguments) {
-            if (types.length === 0) {
-                return neverType;
-            }
-            if (types.length === 1) {
-                return types[0];
+        function getTypeOfPropertyOfContextualType(type, name) {
+            return mapType(type, function (t) {
+                var prop = t.flags & 229376 /* StructuredType */ ? getPropertyOfType(t, name) : undefined;
+                return prop ? getTypeOfSymbol(prop) : undefined;
+            });
+        }
+        function getIndexTypeOfContextualType(type, kind) {
+            return mapType(type, function (t) { return getIndexTypeOfStructuredType(t, kind); });
+        }
+        // Return true if the given contextual type is a tuple-like type
+        function contextualTypeIsTupleLikeType(type) {
+            return !!(type.flags & 65536 /* Union */ ? ts.forEach(type.types, isTupleLikeType) : isTupleLikeType(type));
+        }
+        // In an object literal contextually typed by a type T, the contextual type of a property assignment is the type of
+        // the matching property in T, if one exists. Otherwise, it is the type of the numeric index signature in T, if one
+        // exists. Otherwise, it is the type of the string index signature in T, if one exists.
+        function getContextualTypeForObjectLiteralMethod(node) {
+            ts.Debug.assert(ts.isObjectLiteralMethod(node));
+            if (isInsideWithStatementBody(node)) {
+                // We cannot answer semantic questions within a with block, do not proceed any further
+                return undefined;
             }
-            var id = getTypeListId(types);
-            var type = unionTypes[id];
-            if (!type) {
-                var propagatedFlags = getPropagatingFlagsOfTypes(types, /*excludeKinds*/ 6144 /* Nullable */);
-                type = unionTypes[id] = createObjectType(524288 /* Union */ | propagatedFlags);
-                type.types = types;
-                type.aliasSymbol = aliasSymbol;
-                type.aliasTypeArguments = aliasTypeArguments;
+            return getContextualTypeForObjectLiteralElement(node);
+        }
+        function getContextualTypeForObjectLiteralElement(element) {
+            var objectLiteral = element.parent;
+            var type = getApparentTypeOfContextualType(objectLiteral);
+            if (type) {
+                if (!ts.hasDynamicName(element)) {
+                    // For a (non-symbol) computed property, there is no reason to look up the name
+                    // in the type. It will just be "__computed", which does not appear in any
+                    // SymbolTable.
+                    var symbolName = getSymbolOfNode(element).name;
+                    var propertyType = getTypeOfPropertyOfContextualType(type, symbolName);
+                    if (propertyType) {
+                        return propertyType;
+                    }
+                }
+                return isNumericName(element.name) && getIndexTypeOfContextualType(type, 1 /* Number */) ||
+                    getIndexTypeOfContextualType(type, 0 /* String */);
             }
-            return type;
+            return undefined;
         }
-        function getTypeFromUnionTypeNode(node, aliasSymbol, aliasTypeArguments) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                links.resolvedType = getUnionType(ts.map(node.types, getTypeFromTypeNodeNoAlias), /*subtypeReduction*/ false, aliasSymbol, aliasTypeArguments);
+        // In an array literal contextually typed by a type T, the contextual type of an element expression at index N is
+        // the type of the property with the numeric name N in T, if one exists. Otherwise, if T has a numeric index signature,
+        // it is the type of the numeric index signature in T. Otherwise, in ES6 and higher, the contextual type is the iterated
+        // type of T.
+        function getContextualTypeForElementExpression(node) {
+            var arrayLiteral = node.parent;
+            var type = getApparentTypeOfContextualType(arrayLiteral);
+            if (type) {
+                var index = ts.indexOf(arrayLiteral.elements, node);
+                return getTypeOfPropertyOfContextualType(type, "" + index)
+                    || getIndexTypeOfContextualType(type, 1 /* Number */)
+                    || getIteratedTypeOrElementType(type, /*errorNode*/ undefined, /*allowStringInput*/ false, /*allowAsyncIterables*/ false, /*checkAssignability*/ false);
             }
-            return links.resolvedType;
+            return undefined;
         }
-        function addTypeToIntersection(typeSet, type) {
-            if (type.flags & 1048576 /* Intersection */) {
-                addTypesToIntersection(typeSet, type.types);
+        // In a contextually typed conditional expression, the true/false expressions are contextually typed by the same type.
+        function getContextualTypeForConditionalOperand(node) {
+            var conditional = node.parent;
+            return node === conditional.whenTrue || node === conditional.whenFalse ? getContextualType(conditional) : undefined;
+        }
+        function getContextualTypeForJsxExpression(node) {
+            // JSX expression can appear in two position : JSX Element's children or JSX attribute
+            var jsxAttributes = ts.isJsxAttributeLike(node.parent) ?
+                node.parent.parent :
+                node.parent.openingElement.attributes; // node.parent is JsxElement
+            // When we trying to resolve JsxOpeningLikeElement as a stateless function element, we will already give its attributes a contextual type
+            // which is a type of the parameter of the signature we are trying out.
+            // If there is no contextual type (e.g. we are trying to resolve stateful component), get attributes type from resolving element's tagName
+            var attributesType = getContextualType(jsxAttributes);
+            if (!attributesType || isTypeAny(attributesType)) {
+                return undefined;
             }
-            else if (type.flags & 1 /* Any */) {
-                typeSet.containsAny = true;
+            if (ts.isJsxAttribute(node.parent)) {
+                // JSX expression is in JSX attribute
+                return getTypeOfPropertyOfType(attributesType, node.parent.name.text);
             }
-            else if (!(type.flags & 8192 /* Never */) && (strictNullChecks || !(type.flags & 6144 /* Nullable */)) && !ts.contains(typeSet, type)) {
-                typeSet.push(type);
+            else if (node.parent.kind === 249 /* JsxElement */) {
+                // JSX expression is in children of JSX Element, we will look for an "children" atttribute (we get the name from JSX.ElementAttributesProperty)
+                var jsxChildrenPropertyName = getJsxElementChildrenPropertyname();
+                return jsxChildrenPropertyName && jsxChildrenPropertyName !== "" ? getTypeOfPropertyOfType(attributesType, jsxChildrenPropertyName) : anyType;
             }
-        }
-        // Add the given types to the given type set. Order is preserved, duplicates are removed,
-        // and nested types of the given kind are flattened into the set.
-        function addTypesToIntersection(typeSet, types) {
-            for (var _i = 0, types_6 = types; _i < types_6.length; _i++) {
-                var type = types_6[_i];
-                addTypeToIntersection(typeSet, type);
+            else {
+                // JSX expression is in JSX spread attribute
+                return attributesType;
             }
         }
-        // We do not perform structural deduplication on intersection types. Intersection types are created only by the &
-        // type operator and we can't reduce those because we want to support recursive intersection types. For example,
-        // a type alias of the form "type List<T> = T & { next: List<T> }" cannot be reduced during its declaration.
-        // Also, unlike union types, the order of the constituent types is preserved in order that overload resolution
-        // for intersections of types with signatures can be deterministic.
-        function getIntersectionType(types, aliasSymbol, aliasTypeArguments) {
-            if (types.length === 0) {
-                return emptyObjectType;
+        function getContextualTypeForJsxAttribute(attribute) {
+            // When we trying to resolve JsxOpeningLikeElement as a stateless function element, we will already give its attributes a contextual type
+            // which is a type of the parameter of the signature we are trying out.
+            // If there is no contextual type (e.g. we are trying to resolve stateful component), get attributes type from resolving element's tagName
+            var attributesType = getContextualType(attribute.parent);
+            if (ts.isJsxAttribute(attribute)) {
+                if (!attributesType || isTypeAny(attributesType)) {
+                    return undefined;
+                }
+                return getTypeOfPropertyOfType(attributesType, attribute.name.text);
             }
-            var typeSet = [];
-            addTypesToIntersection(typeSet, types);
-            if (typeSet.containsAny) {
-                return anyType;
+            else {
+                return attributesType;
+            }
+        }
+        // Return the contextual type for a given expression node. During overload resolution, a contextual type may temporarily
+        // be "pushed" onto a node using the contextualType property.
+        function getApparentTypeOfContextualType(node) {
+            var type = getContextualType(node);
+            return type && getApparentType(type);
+        }
+        /**
+         * Woah! Do you really want to use this function?
+         *
+         * Unless you're trying to get the *non-apparent* type for a
+         * value-literal type or you're authoring relevant portions of this algorithm,
+         * you probably meant to use 'getApparentTypeOfContextualType'.
+         * Otherwise this may not be very useful.
+         *
+         * In cases where you *are* working on this function, you should understand
+         * when it is appropriate to use 'getContextualType' and 'getApparentTypeOfContextualType'.
+         *
+         *   - Use 'getContextualType' when you are simply going to propagate the result to the expression.
+         *   - Use 'getApparentTypeOfContextualType' when you're going to need the members of the type.
+         *
+         * @param node the expression whose contextual type will be returned.
+         * @returns the contextual type of an expression.
+         */
+        function getContextualType(node) {
+            if (isInsideWithStatementBody(node)) {
+                // We cannot answer semantic questions within a with block, do not proceed any further
+                return undefined;
             }
-            if (typeSet.length === 1) {
-                return typeSet[0];
+            if (node.contextualType) {
+                return node.contextualType;
             }
-            var id = getTypeListId(typeSet);
-            var type = intersectionTypes[id];
-            if (!type) {
-                var propagatedFlags = getPropagatingFlagsOfTypes(typeSet, /*excludeKinds*/ 6144 /* Nullable */);
-                type = intersectionTypes[id] = createObjectType(1048576 /* Intersection */ | propagatedFlags);
-                type.types = typeSet;
-                type.aliasSymbol = aliasSymbol;
-                type.aliasTypeArguments = aliasTypeArguments;
+            var parent = node.parent;
+            switch (parent.kind) {
+                case 226 /* VariableDeclaration */:
+                case 146 /* Parameter */:
+                case 149 /* PropertyDeclaration */:
+                case 148 /* PropertySignature */:
+                case 176 /* BindingElement */:
+                    return getContextualTypeForInitializerExpression(node);
+                case 187 /* ArrowFunction */:
+                case 219 /* ReturnStatement */:
+                    return getContextualTypeForReturnExpression(node);
+                case 197 /* YieldExpression */:
+                    return getContextualTypeForYieldOperand(parent);
+                case 181 /* CallExpression */:
+                case 182 /* NewExpression */:
+                    return getContextualTypeForArgument(parent, node);
+                case 184 /* TypeAssertionExpression */:
+                case 202 /* AsExpression */:
+                    return getTypeFromTypeNode(parent.type);
+                case 194 /* BinaryExpression */:
+                    return getContextualTypeForBinaryOperand(node);
+                case 261 /* PropertyAssignment */:
+                case 262 /* ShorthandPropertyAssignment */:
+                    return getContextualTypeForObjectLiteralElement(parent);
+                case 263 /* SpreadAssignment */:
+                    return getApparentTypeOfContextualType(parent.parent);
+                case 177 /* ArrayLiteralExpression */:
+                    return getContextualTypeForElementExpression(node);
+                case 195 /* ConditionalExpression */:
+                    return getContextualTypeForConditionalOperand(node);
+                case 205 /* TemplateSpan */:
+                    ts.Debug.assert(parent.parent.kind === 196 /* TemplateExpression */);
+                    return getContextualTypeForSubstitutionExpression(parent.parent, node);
+                case 185 /* ParenthesizedExpression */:
+                    return getContextualType(parent);
+                case 256 /* JsxExpression */:
+                    return getContextualTypeForJsxExpression(parent);
+                case 253 /* JsxAttribute */:
+                case 255 /* JsxSpreadAttribute */:
+                    return getContextualTypeForJsxAttribute(parent);
+                case 251 /* JsxOpeningElement */:
+                case 250 /* JsxSelfClosingElement */:
+                    return getAttributesTypeFromJsxOpeningLikeElement(parent);
             }
-            return type;
+            return undefined;
         }
-        function getTypeFromIntersectionTypeNode(node, aliasSymbol, aliasTypeArguments) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                links.resolvedType = getIntersectionType(ts.map(node.types, getTypeFromTypeNodeNoAlias), aliasSymbol, aliasTypeArguments);
-            }
-            return links.resolvedType;
+        function getContextualMapper(node) {
+            node = ts.findAncestor(node, function (n) { return !!n.contextualMapper; });
+            return node ? node.contextualMapper : identityMapper;
         }
-        function getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node, aliasSymbol, aliasTypeArguments) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                // Deferred resolution of members is handled by resolveObjectTypeMembers
-                var type = createObjectType(2097152 /* Anonymous */, node.symbol);
-                type.aliasSymbol = aliasSymbol;
-                type.aliasTypeArguments = aliasTypeArguments;
-                links.resolvedType = type;
+        // If the given type is an object or union type with a single signature, and if that signature has at
+        // least as many parameters as the given function, return the signature. Otherwise return undefined.
+        function getContextualCallSignature(type, node) {
+            var signatures = getSignaturesOfStructuredType(type, 0 /* Call */);
+            if (signatures.length === 1) {
+                var signature = signatures[0];
+                if (!isAritySmaller(signature, node)) {
+                    return signature;
+                }
             }
-            return links.resolvedType;
         }
-        function createLiteralType(flags, text) {
-            var type = createType(flags);
-            type.text = text;
-            return type;
-        }
-        function getFreshTypeOfLiteralType(type) {
-            if (type.flags & 96 /* StringOrNumberLiteral */ && !(type.flags & 16777216 /* FreshLiteral */)) {
-                if (!type.freshType) {
-                    var freshType = createLiteralType(type.flags | 16777216 /* FreshLiteral */, type.text);
-                    freshType.regularType = type;
-                    type.freshType = freshType;
+        /** If the contextual signature has fewer parameters than the function expression, do not use it */
+        function isAritySmaller(signature, target) {
+            var targetParameterCount = 0;
+            for (; targetParameterCount < target.parameters.length; targetParameterCount++) {
+                var param = target.parameters[targetParameterCount];
+                if (param.initializer || param.questionToken || param.dotDotDotToken || isJSDocOptionalParameter(param)) {
+                    break;
                 }
-                return type.freshType;
             }
-            return type;
+            if (target.parameters.length && ts.parameterIsThisKeyword(target.parameters[0])) {
+                targetParameterCount--;
+            }
+            var sourceLength = signature.hasRestParameter ? Number.MAX_VALUE : signature.parameters.length;
+            return sourceLength < targetParameterCount;
         }
-        function getRegularTypeOfLiteralType(type) {
-            return type.flags & 96 /* StringOrNumberLiteral */ && type.flags & 16777216 /* FreshLiteral */ ? type.regularType : type;
+        function isFunctionExpressionOrArrowFunction(node) {
+            return node.kind === 186 /* FunctionExpression */ || node.kind === 187 /* ArrowFunction */;
         }
-        function getLiteralTypeForText(flags, text) {
-            var map = flags & 32 /* StringLiteral */ ? stringLiteralTypes : numericLiteralTypes;
-            return map[text] || (map[text] = createLiteralType(flags, text));
+        function getContextualSignatureForFunctionLikeDeclaration(node) {
+            // Only function expressions, arrow functions, and object literal methods are contextually typed.
+            return isFunctionExpressionOrArrowFunction(node) || ts.isObjectLiteralMethod(node)
+                ? getContextualSignature(node)
+                : undefined;
         }
-        function getTypeFromLiteralTypeNode(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                links.resolvedType = getRegularTypeOfLiteralType(checkExpression(node.literal));
-            }
-            return links.resolvedType;
+        function getContextualTypeForFunctionLikeDeclaration(node) {
+            return ts.isObjectLiteralMethod(node) ?
+                getContextualTypeForObjectLiteralMethod(node) :
+                getApparentTypeOfContextualType(node);
         }
-        function getTypeFromJSDocVariadicType(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                var type = getTypeFromTypeNode(node.type);
-                links.resolvedType = type ? createArrayType(type) : unknownType;
+        // Return the contextual signature for a given expression node. A contextual type provides a
+        // contextual signature if it has a single call signature and if that call signature is non-generic.
+        // If the contextual type is a union type, get the signature from each type possible and if they are
+        // all identical ignoring their return type, the result is same signature but with return type as
+        // union type of return types from these signatures
+        function getContextualSignature(node) {
+            ts.Debug.assert(node.kind !== 151 /* MethodDeclaration */ || ts.isObjectLiteralMethod(node));
+            var type = getContextualTypeForFunctionLikeDeclaration(node);
+            if (!type) {
+                return undefined;
             }
-            return links.resolvedType;
-        }
-        function getTypeFromJSDocTupleType(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                var types = ts.map(node.types, getTypeFromTypeNodeNoAlias);
-                links.resolvedType = createTupleType(types);
+            if (!(type.flags & 65536 /* Union */)) {
+                return getContextualCallSignature(type, node);
             }
-            return links.resolvedType;
-        }
-        function getThisType(node) {
-            var container = ts.getThisContainer(node, /*includeArrowFunctions*/ false);
-            var parent = container && container.parent;
-            if (parent && (ts.isClassLike(parent) || parent.kind === 222 /* InterfaceDeclaration */)) {
-                if (!(ts.getModifierFlags(container) & 32 /* Static */) &&
-                    (container.kind !== 148 /* Constructor */ || ts.isNodeDescendantOf(node, container.body))) {
-                    return getDeclaredTypeOfClassOrInterface(getSymbolOfNode(parent)).thisType;
+            var signatureList;
+            var types = type.types;
+            for (var _i = 0, types_15 = types; _i < types_15.length; _i++) {
+                var current = types_15[_i];
+                var signature = getContextualCallSignature(current, node);
+                if (signature) {
+                    if (!signatureList) {
+                        // This signature will contribute to contextual union signature
+                        signatureList = [signature];
+                    }
+                    else if (!compareSignaturesIdentical(signatureList[0], signature, /*partialMatch*/ false, /*ignoreThisTypes*/ true, /*ignoreReturnTypes*/ true, compareTypesIdentical)) {
+                        // Signatures aren't identical, do not use
+                        return undefined;
+                    }
+                    else {
+                        // Use this signature for contextual union signature
+                        signatureList.push(signature);
+                    }
                 }
             }
-            error(node, ts.Diagnostics.A_this_type_is_available_only_in_a_non_static_member_of_a_class_or_interface);
-            return unknownType;
-        }
-        function getTypeFromThisTypeNode(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                links.resolvedType = getThisType(node);
-            }
-            return links.resolvedType;
-        }
-        function getTypeFromTypeNodeNoAlias(type) {
-            return getTypeFromTypeNode(type, /*aliasSymbol*/ undefined, /*aliasTypeArguments*/ undefined);
-        }
-        function getTypeFromTypeNode(node, aliasSymbol, aliasTypeArguments) {
-            switch (node.kind) {
-                case 117 /* AnyKeyword */:
-                case 258 /* JSDocAllType */:
-                case 259 /* JSDocUnknownType */:
-                    return anyType;
-                case 132 /* StringKeyword */:
-                    return stringType;
-                case 130 /* NumberKeyword */:
-                    return numberType;
-                case 120 /* BooleanKeyword */:
-                    return booleanType;
-                case 133 /* SymbolKeyword */:
-                    return esSymbolType;
-                case 103 /* VoidKeyword */:
-                    return voidType;
-                case 135 /* UndefinedKeyword */:
-                    return undefinedType;
-                case 93 /* NullKeyword */:
-                    return nullType;
-                case 127 /* NeverKeyword */:
-                    return neverType;
-                case 283 /* JSDocNullKeyword */:
-                    return nullType;
-                case 284 /* JSDocUndefinedKeyword */:
-                    return undefinedType;
-                case 285 /* JSDocNeverKeyword */:
-                    return neverType;
-                case 165 /* ThisType */:
-                case 97 /* ThisKeyword */:
-                    return getTypeFromThisTypeNode(node);
-                case 166 /* LiteralType */:
-                    return getTypeFromLiteralTypeNode(node);
-                case 282 /* JSDocLiteralType */:
-                    return getTypeFromLiteralTypeNode(node.literal);
-                case 155 /* TypeReference */:
-                case 267 /* JSDocTypeReference */:
-                    return getTypeFromTypeReference(node);
-                case 154 /* TypePredicate */:
-                    return booleanType;
-                case 194 /* ExpressionWithTypeArguments */:
-                    return getTypeFromTypeReference(node);
-                case 158 /* TypeQuery */:
-                    return getTypeFromTypeQueryNode(node);
-                case 160 /* ArrayType */:
-                case 260 /* JSDocArrayType */:
-                    return getTypeFromArrayTypeNode(node);
-                case 161 /* TupleType */:
-                    return getTypeFromTupleTypeNode(node);
-                case 162 /* UnionType */:
-                case 261 /* JSDocUnionType */:
-                    return getTypeFromUnionTypeNode(node, aliasSymbol, aliasTypeArguments);
-                case 163 /* IntersectionType */:
-                    return getTypeFromIntersectionTypeNode(node, aliasSymbol, aliasTypeArguments);
-                case 164 /* ParenthesizedType */:
-                case 263 /* JSDocNullableType */:
-                case 264 /* JSDocNonNullableType */:
-                case 271 /* JSDocConstructorType */:
-                case 272 /* JSDocThisType */:
-                case 268 /* JSDocOptionalType */:
-                    return getTypeFromTypeNode(node.type);
-                case 265 /* JSDocRecordType */:
-                    return getTypeFromTypeNode(node.literal);
-                case 156 /* FunctionType */:
-                case 157 /* ConstructorType */:
-                case 159 /* TypeLiteral */:
-                case 281 /* JSDocTypeLiteral */:
-                case 269 /* JSDocFunctionType */:
-                    return getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node, aliasSymbol, aliasTypeArguments);
-                // This function assumes that an identifier or qualified name is a type expression
-                // Callers should first ensure this by calling isTypeNode
-                case 69 /* Identifier */:
-                case 139 /* QualifiedName */:
-                    var symbol = getSymbolAtLocation(node);
-                    return symbol && getDeclaredTypeOfSymbol(symbol);
-                case 262 /* JSDocTupleType */:
-                    return getTypeFromJSDocTupleType(node);
-                case 270 /* JSDocVariadicType */:
-                    return getTypeFromJSDocVariadicType(node);
-                default:
-                    return unknownType;
+            // Result is union of signatures collected (return type is union of return types of this signature set)
+            var result;
+            if (signatureList) {
+                result = cloneSignature(signatureList[0]);
+                // Clear resolved return type we possibly got from cloneSignature
+                result.resolvedReturnType = undefined;
+                result.unionSignatures = signatureList;
             }
+            return result;
         }
-        function instantiateList(items, mapper, instantiator) {
-            if (items && items.length) {
-                var result = [];
-                for (var _i = 0, items_1 = items; _i < items_1.length; _i++) {
-                    var v = items_1[_i];
-                    result.push(instantiator(v, mapper));
-                }
-                return result;
+        function checkSpreadExpression(node, checkMode) {
+            if (languageVersion < 2 /* ES2015 */ && compilerOptions.downlevelIteration) {
+                checkExternalEmitHelpers(node, 1536 /* SpreadIncludes */);
             }
-            return items;
-        }
-        function createUnaryTypeMapper(source, target) {
-            return function (t) { return t === source ? target : t; };
+            var arrayOrIterableType = checkExpression(node.expression, checkMode);
+            return checkIteratedTypeOrElementType(arrayOrIterableType, node.expression, /*allowStringInput*/ false, /*allowAsyncIterables*/ false);
         }
-        function createBinaryTypeMapper(source1, target1, source2, target2) {
-            return function (t) { return t === source1 ? target1 : t === source2 ? target2 : t; };
+        function hasDefaultValue(node) {
+            return (node.kind === 176 /* BindingElement */ && !!node.initializer) ||
+                (node.kind === 194 /* BinaryExpression */ && node.operatorToken.kind === 58 /* EqualsToken */);
         }
-        function createArrayTypeMapper(sources, targets) {
-            return function (t) {
-                for (var i = 0; i < sources.length; i++) {
-                    if (t === sources[i]) {
-                        return targets ? targets[i] : anyType;
+        function checkArrayLiteral(node, checkMode) {
+            var elements = node.elements;
+            var hasSpreadElement = false;
+            var elementTypes = [];
+            var inDestructuringPattern = ts.isAssignmentTarget(node);
+            for (var _i = 0, elements_1 = elements; _i < elements_1.length; _i++) {
+                var e = elements_1[_i];
+                if (inDestructuringPattern && e.kind === 198 /* SpreadElement */) {
+                    // Given the following situation:
+                    //    var c: {};
+                    //    [...c] = ["", 0];
+                    //
+                    // c is represented in the tree as a spread element in an array literal.
+                    // But c really functions as a rest element, and its purpose is to provide
+                    // a contextual type for the right hand side of the assignment. Therefore,
+                    // instead of calling checkExpression on "...c", which will give an error
+                    // if c is not iterable/array-like, we need to act as if we are trying to
+                    // get the contextual element type from it. So we do something similar to
+                    // getContextualTypeForElementExpression, which will crucially not error
+                    // if there is no index type / iterated type.
+                    var restArrayType = checkExpression(e.expression, checkMode);
+                    var restElementType = getIndexTypeOfType(restArrayType, 1 /* Number */) ||
+                        getIteratedTypeOrElementType(restArrayType, /*errorNode*/ undefined, /*allowStringInput*/ false, /*allowAsyncIterables*/ false, /*checkAssignability*/ false);
+                    if (restElementType) {
+                        elementTypes.push(restElementType);
                     }
                 }
-                return t;
-            };
-        }
-        function createTypeMapper(sources, targets) {
-            var count = sources.length;
-            var mapper = count == 1 ? createUnaryTypeMapper(sources[0], targets ? targets[0] : anyType) :
-                count == 2 ? createBinaryTypeMapper(sources[0], targets ? targets[0] : anyType, sources[1], targets ? targets[1] : anyType) :
-                    createArrayTypeMapper(sources, targets);
-            mapper.mappedTypes = sources;
-            mapper.targetTypes = targets;
-            return mapper;
-        }
-        function createTypeEraser(sources) {
-            return createTypeMapper(sources, undefined);
-        }
-        function getInferenceMapper(context) {
-            if (!context.mapper) {
-                var mapper = function (t) {
-                    var typeParameters = context.signature.typeParameters;
-                    for (var i = 0; i < typeParameters.length; i++) {
-                        if (t === typeParameters[i]) {
-                            context.inferences[i].isFixed = true;
-                            return getInferredType(context, i);
+                else {
+                    var type = checkExpressionForMutableLocation(e, checkMode);
+                    elementTypes.push(type);
+                }
+                hasSpreadElement = hasSpreadElement || e.kind === 198 /* SpreadElement */;
+            }
+            if (!hasSpreadElement) {
+                // If array literal is actually a destructuring pattern, mark it as an implied type. We do this such
+                // that we get the same behavior for "var [x, y] = []" and "[x, y] = []".
+                if (inDestructuringPattern && elementTypes.length) {
+                    var type = cloneTypeReference(createTupleType(elementTypes));
+                    type.pattern = node;
+                    return type;
+                }
+                var contextualType = getApparentTypeOfContextualType(node);
+                if (contextualType && contextualTypeIsTupleLikeType(contextualType)) {
+                    var pattern = contextualType.pattern;
+                    // If array literal is contextually typed by a binding pattern or an assignment pattern, pad the resulting
+                    // tuple type with the corresponding binding or assignment element types to make the lengths equal.
+                    if (pattern && (pattern.kind === 175 /* ArrayBindingPattern */ || pattern.kind === 177 /* ArrayLiteralExpression */)) {
+                        var patternElements = pattern.elements;
+                        for (var i = elementTypes.length; i < patternElements.length; i++) {
+                            var patternElement = patternElements[i];
+                            if (hasDefaultValue(patternElement)) {
+                                elementTypes.push(contextualType.typeArguments[i]);
+                            }
+                            else {
+                                if (patternElement.kind !== 200 /* OmittedExpression */) {
+                                    error(patternElement, ts.Diagnostics.Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value);
+                                }
+                                elementTypes.push(unknownType);
+                            }
                         }
                     }
-                    return t;
-                };
-                mapper.mappedTypes = context.signature.typeParameters;
-                mapper.context = context;
-                context.mapper = mapper;
+                    if (elementTypes.length) {
+                        return createTupleType(elementTypes);
+                    }
+                }
             }
-            return context.mapper;
+            return createArrayType(elementTypes.length ?
+                getUnionType(elementTypes, /*subtypeReduction*/ true) :
+                strictNullChecks ? neverType : undefinedWideningType);
         }
-        function identityMapper(type) {
-            return type;
+        function isNumericName(name) {
+            return name.kind === 144 /* ComputedPropertyName */ ? isNumericComputedName(name) : isNumericLiteralName(name.text);
         }
-        function combineTypeMappers(mapper1, mapper2) {
-            var mapper = function (t) { return instantiateType(mapper1(t), mapper2); };
-            mapper.mappedTypes = mapper1.mappedTypes;
-            return mapper;
+        function isNumericComputedName(name) {
+            // It seems odd to consider an expression of type Any to result in a numeric name,
+            // but this behavior is consistent with checkIndexedAccess
+            return isTypeAnyOrAllConstituentTypesHaveKind(checkComputedPropertyName(name), 84 /* NumberLike */);
         }
-        function cloneTypeParameter(typeParameter) {
-            var result = createType(16384 /* TypeParameter */);
-            result.symbol = typeParameter.symbol;
-            result.target = typeParameter;
-            return result;
+        function isTypeAnyOrAllConstituentTypesHaveKind(type, kind) {
+            return isTypeAny(type) || isTypeOfKind(type, kind);
         }
-        function cloneTypePredicate(predicate, mapper) {
-            if (ts.isIdentifierTypePredicate(predicate)) {
-                return {
-                    kind: 1 /* Identifier */,
-                    parameterName: predicate.parameterName,
-                    parameterIndex: predicate.parameterIndex,
-                    type: instantiateType(predicate.type, mapper)
-                };
-            }
-            else {
-                return {
-                    kind: 0 /* This */,
-                    type: instantiateType(predicate.type, mapper)
-                };
-            }
+        function isInfinityOrNaNString(name) {
+            return name === "Infinity" || name === "-Infinity" || name === "NaN";
         }
-        function instantiateSignature(signature, mapper, eraseTypeParameters) {
-            var freshTypeParameters;
-            var freshTypePredicate;
-            if (signature.typeParameters && !eraseTypeParameters) {
-                // First create a fresh set of type parameters, then include a mapping from the old to the
-                // new type parameters in the mapper function. Finally store this mapper in the new type
-                // parameters such that we can use it when instantiating constraints.
-                freshTypeParameters = ts.map(signature.typeParameters, cloneTypeParameter);
-                mapper = combineTypeMappers(createTypeMapper(signature.typeParameters, freshTypeParameters), mapper);
-                for (var _i = 0, freshTypeParameters_1 = freshTypeParameters; _i < freshTypeParameters_1.length; _i++) {
-                    var tp = freshTypeParameters_1[_i];
-                    tp.mapper = mapper;
-                }
-            }
-            if (signature.typePredicate) {
-                freshTypePredicate = cloneTypePredicate(signature.typePredicate, mapper);
-            }
-            var result = createSignature(signature.declaration, freshTypeParameters, signature.thisParameter && instantiateSymbol(signature.thisParameter, mapper), instantiateList(signature.parameters, mapper, instantiateSymbol), instantiateType(signature.resolvedReturnType, mapper), freshTypePredicate, signature.minArgumentCount, signature.hasRestParameter, signature.hasLiteralTypes);
-            result.target = signature;
-            result.mapper = mapper;
-            return result;
+        function isNumericLiteralName(name) {
+            // The intent of numeric names is that
+            //     - they are names with text in a numeric form, and that
+            //     - setting properties/indexing with them is always equivalent to doing so with the numeric literal 'numLit',
+            //         acquired by applying the abstract 'ToNumber' operation on the name's text.
+            //
+            // The subtlety is in the latter portion, as we cannot reliably say that anything that looks like a numeric literal is a numeric name.
+            // In fact, it is the case that the text of the name must be equal to 'ToString(numLit)' for this to hold.
+            //
+            // Consider the property name '"0xF00D"'. When one indexes with '0xF00D', they are actually indexing with the value of 'ToString(0xF00D)'
+            // according to the ECMAScript specification, so it is actually as if the user indexed with the string '"61453"'.
+            // Thus, the text of all numeric literals equivalent to '61543' such as '0xF00D', '0xf00D', '0170015', etc. are not valid numeric names
+            // because their 'ToString' representation is not equal to their original text.
+            // This is motivated by ECMA-262 sections 9.3.1, 9.8.1, 11.1.5, and 11.2.1.
+            //
+            // Here, we test whether 'ToString(ToNumber(name))' is exactly equal to 'name'.
+            // The '+' prefix operator is equivalent here to applying the abstract ToNumber operation.
+            // Applying the 'toString()' method on a number gives us the abstract ToString operation on a number.
+            //
+            // Note that this accepts the values 'Infinity', '-Infinity', and 'NaN', and that this is intentional.
+            // This is desired behavior, because when indexing with them as numeric entities, you are indexing
+            // with the strings '"Infinity"', '"-Infinity"', and '"NaN"' respectively.
+            return (+name).toString() === name;
         }
-        function instantiateSymbol(symbol, mapper) {
-            if (symbol.flags & 16777216 /* Instantiated */) {
-                var links = getSymbolLinks(symbol);
-                // If symbol being instantiated is itself a instantiation, fetch the original target and combine the
-                // type mappers. This ensures that original type identities are properly preserved and that aliases
-                // always reference a non-aliases.
-                symbol = links.target;
-                mapper = combineTypeMappers(links.mapper, mapper);
-            }
-            // Keep the flags from the symbol we're instantiating.  Mark that is instantiated, and
-            // also transient so that we can just store data on it directly.
-            var result = createSymbol(16777216 /* Instantiated */ | 67108864 /* Transient */ | symbol.flags, symbol.name);
-            result.declarations = symbol.declarations;
-            result.parent = symbol.parent;
-            result.target = symbol;
-            result.mapper = mapper;
-            if (symbol.valueDeclaration) {
-                result.valueDeclaration = symbol.valueDeclaration;
+        function checkComputedPropertyName(node) {
+            var links = getNodeLinks(node.expression);
+            if (!links.resolvedType) {
+                links.resolvedType = checkExpression(node.expression);
+                // This will allow types number, string, symbol or any. It will also allow enums, the unknown
+                // type, and any union of these types (like string | number).
+                if (!isTypeAnyOrAllConstituentTypesHaveKind(links.resolvedType, 84 /* NumberLike */ | 262178 /* StringLike */ | 512 /* ESSymbol */)) {
+                    error(node, ts.Diagnostics.A_computed_property_name_must_be_of_type_string_number_symbol_or_any);
+                }
+                else {
+                    checkThatExpressionIsProperSymbolReference(node.expression, links.resolvedType, /*reportError*/ true);
+                }
             }
-            return result;
+            return links.resolvedType;
         }
-        function instantiateAnonymousType(type, mapper) {
-            if (mapper.instantiations) {
-                var cachedType = mapper.instantiations[type.id];
-                if (cachedType) {
-                    return cachedType;
+        function getObjectLiteralIndexInfo(propertyNodes, offset, properties, kind) {
+            var propTypes = [];
+            for (var i = 0; i < properties.length; i++) {
+                if (kind === 0 /* String */ || isNumericName(propertyNodes[i + offset].name)) {
+                    propTypes.push(getTypeOfSymbol(properties[i]));
                 }
             }
-            else {
-                mapper.instantiations = [];
-            }
-            // Mark the anonymous type as instantiated such that our infinite instantiation detection logic can recognize it
-            var result = createObjectType(2097152 /* Anonymous */ | 4194304 /* Instantiated */, type.symbol);
-            result.target = type;
-            result.mapper = mapper;
-            result.aliasSymbol = type.aliasSymbol;
-            result.aliasTypeArguments = mapper.targetTypes;
-            mapper.instantiations[type.id] = result;
-            return result;
+            var unionType = propTypes.length ? getUnionType(propTypes, /*subtypeReduction*/ true) : undefinedType;
+            return createIndexInfo(unionType, /*isReadonly*/ false);
         }
-        function isSymbolInScopeOfMappedTypeParameter(symbol, mapper) {
-            var mappedTypes = mapper.mappedTypes;
-            // Starting with the parent of the symbol's declaration, check if the mapper maps any of
-            // the type parameters introduced by enclosing declarations. We just pick the first
-            // declaration since multiple declarations will all have the same parent anyway.
-            var node = symbol.declarations[0].parent;
-            while (node) {
-                switch (node.kind) {
-                    case 156 /* FunctionType */:
-                    case 157 /* ConstructorType */:
-                    case 220 /* FunctionDeclaration */:
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                    case 148 /* Constructor */:
-                    case 151 /* CallSignature */:
-                    case 152 /* ConstructSignature */:
-                    case 153 /* IndexSignature */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                    case 179 /* FunctionExpression */:
-                    case 180 /* ArrowFunction */:
-                    case 221 /* ClassDeclaration */:
-                    case 192 /* ClassExpression */:
-                    case 222 /* InterfaceDeclaration */:
-                    case 223 /* TypeAliasDeclaration */:
-                        var declaration = node;
-                        if (declaration.typeParameters) {
-                            for (var _i = 0, _a = declaration.typeParameters; _i < _a.length; _i++) {
-                                var d = _a[_i];
-                                if (ts.contains(mappedTypes, getDeclaredTypeOfTypeParameter(getSymbolOfNode(d)))) {
-                                    return true;
-                                }
-                            }
+        function checkObjectLiteral(node, checkMode) {
+            var inDestructuringPattern = ts.isAssignmentTarget(node);
+            // Grammar checking
+            checkGrammarObjectLiteralExpression(node, inDestructuringPattern);
+            var propertiesTable = ts.createMap();
+            var propertiesArray = [];
+            var spread = emptyObjectType;
+            var propagatedFlags = 0;
+            var contextualType = getApparentTypeOfContextualType(node);
+            var contextualTypeHasPattern = contextualType && contextualType.pattern &&
+                (contextualType.pattern.kind === 174 /* ObjectBindingPattern */ || contextualType.pattern.kind === 178 /* ObjectLiteralExpression */);
+            var isJSObjectLiteral = !contextualType && ts.isInJavaScriptFile(node);
+            var typeFlags = 0;
+            var patternWithComputedProperties = false;
+            var hasComputedStringProperty = false;
+            var hasComputedNumberProperty = false;
+            var offset = 0;
+            for (var i = 0; i < node.properties.length; i++) {
+                var memberDecl = node.properties[i];
+                var member = memberDecl.symbol;
+                if (memberDecl.kind === 261 /* PropertyAssignment */ ||
+                    memberDecl.kind === 262 /* ShorthandPropertyAssignment */ ||
+                    ts.isObjectLiteralMethod(memberDecl)) {
+                    var type = void 0;
+                    if (memberDecl.kind === 261 /* PropertyAssignment */) {
+                        type = checkPropertyAssignment(memberDecl, checkMode);
+                    }
+                    else if (memberDecl.kind === 151 /* MethodDeclaration */) {
+                        type = checkObjectLiteralMethod(memberDecl, checkMode);
+                    }
+                    else {
+                        ts.Debug.assert(memberDecl.kind === 262 /* ShorthandPropertyAssignment */);
+                        type = checkExpressionForMutableLocation(memberDecl.name, checkMode);
+                    }
+                    typeFlags |= type.flags;
+                    var prop = createSymbol(4 /* Property */ | member.flags, member.name);
+                    if (inDestructuringPattern) {
+                        // If object literal is an assignment pattern and if the assignment pattern specifies a default value
+                        // for the property, make the property optional.
+                        var isOptional = (memberDecl.kind === 261 /* PropertyAssignment */ && hasDefaultValue(memberDecl.initializer)) ||
+                            (memberDecl.kind === 262 /* ShorthandPropertyAssignment */ && memberDecl.objectAssignmentInitializer);
+                        if (isOptional) {
+                            prop.flags |= 67108864 /* Optional */;
                         }
-                        if (ts.isClassLike(node) || node.kind === 222 /* InterfaceDeclaration */) {
-                            var thisType = getDeclaredTypeOfClassOrInterface(getSymbolOfNode(node)).thisType;
-                            if (thisType && ts.contains(mappedTypes, thisType)) {
-                                return true;
-                            }
+                        if (ts.hasDynamicName(memberDecl)) {
+                            patternWithComputedProperties = true;
                         }
-                        break;
-                    case 225 /* ModuleDeclaration */:
-                    case 256 /* SourceFile */:
-                        return false;
-                }
-                node = node.parent;
-            }
-            return false;
-        }
-        function instantiateType(type, mapper) {
-            if (type && mapper !== identityMapper) {
-                if (type.flags & 16384 /* TypeParameter */) {
-                    return mapper(type);
+                    }
+                    else if (contextualTypeHasPattern && !(getObjectFlags(contextualType) & 512 /* ObjectLiteralPatternWithComputedProperties */)) {
+                        // If object literal is contextually typed by the implied type of a binding pattern, and if the
+                        // binding pattern specifies a default value for the property, make the property optional.
+                        var impliedProp = getPropertyOfType(contextualType, member.name);
+                        if (impliedProp) {
+                            prop.flags |= impliedProp.flags & 67108864 /* Optional */;
+                        }
+                        else if (!compilerOptions.suppressExcessPropertyErrors && !getIndexInfoOfType(contextualType, 0 /* String */)) {
+                            error(memberDecl.name, ts.Diagnostics.Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1, symbolToString(member), typeToString(contextualType));
+                        }
+                    }
+                    prop.declarations = member.declarations;
+                    prop.parent = member.parent;
+                    if (member.valueDeclaration) {
+                        prop.valueDeclaration = member.valueDeclaration;
+                    }
+                    prop.type = type;
+                    prop.target = member;
+                    member = prop;
                 }
-                if (type.flags & 2097152 /* Anonymous */) {
-                    // If the anonymous type originates in a declaration of a function, method, class, or
-                    // interface, in an object type literal, or in an object literal expression, we may need
-                    // to instantiate the type because it might reference a type parameter. We skip instantiation
-                    // if none of the type parameters that are in scope in the type's declaration are mapped by
-                    // the given mapper, however we can only do that analysis if the type isn't itself an
-                    // instantiation.
-                    return type.symbol &&
-                        type.symbol.flags & (16 /* Function */ | 8192 /* Method */ | 32 /* Class */ | 2048 /* TypeLiteral */ | 4096 /* ObjectLiteral */) &&
-                        (type.flags & 4194304 /* Instantiated */ || isSymbolInScopeOfMappedTypeParameter(type.symbol, mapper)) ?
-                        instantiateAnonymousType(type, mapper) : type;
+                else if (memberDecl.kind === 263 /* SpreadAssignment */) {
+                    if (languageVersion < 2 /* ES2015 */) {
+                        checkExternalEmitHelpers(memberDecl, 2 /* Assign */);
+                    }
+                    if (propertiesArray.length > 0) {
+                        spread = getSpreadType(spread, createObjectLiteralType());
+                        propertiesArray = [];
+                        propertiesTable = ts.createMap();
+                        hasComputedStringProperty = false;
+                        hasComputedNumberProperty = false;
+                        typeFlags = 0;
+                    }
+                    var type = checkExpression(memberDecl.expression);
+                    if (!isValidSpreadType(type)) {
+                        error(memberDecl, ts.Diagnostics.Spread_types_may_only_be_created_from_object_types);
+                        return unknownType;
+                    }
+                    spread = getSpreadType(spread, type);
+                    offset = i + 1;
+                    continue;
                 }
-                if (type.flags & 131072 /* Reference */) {
-                    return createTypeReference(type.target, instantiateList(type.typeArguments, mapper, instantiateType));
+                else {
+                    // TypeScript 1.0 spec (April 2014)
+                    // A get accessor declaration is processed in the same manner as
+                    // an ordinary function declaration(section 6.1) with no parameters.
+                    // A set accessor declaration is processed in the same manner
+                    // as an ordinary function declaration with a single parameter and a Void return type.
+                    ts.Debug.assert(memberDecl.kind === 153 /* GetAccessor */ || memberDecl.kind === 154 /* SetAccessor */);
+                    checkNodeDeferred(memberDecl);
                 }
-                if (type.flags & 524288 /* Union */ && !(type.flags & 8190 /* Primitive */)) {
-                    return getUnionType(instantiateList(type.types, mapper, instantiateType), /*subtypeReduction*/ false, type.aliasSymbol, mapper.targetTypes);
+                if (ts.hasDynamicName(memberDecl)) {
+                    if (isNumericName(memberDecl.name)) {
+                        hasComputedNumberProperty = true;
+                    }
+                    else {
+                        hasComputedStringProperty = true;
+                    }
                 }
-                if (type.flags & 1048576 /* Intersection */) {
-                    return getIntersectionType(instantiateList(type.types, mapper, instantiateType), type.aliasSymbol, mapper.targetTypes);
+                else {
+                    propertiesTable.set(member.name, member);
                 }
+                propertiesArray.push(member);
             }
-            return type;
-        }
-        function instantiateIndexInfo(info, mapper) {
-            return info && createIndexInfo(instantiateType(info.type, mapper), info.isReadonly, info.declaration);
-        }
-        // Returns true if the given expression contains (at any level of nesting) a function or arrow expression
-        // that is subject to contextual typing.
-        function isContextSensitive(node) {
-            ts.Debug.assert(node.kind !== 147 /* MethodDeclaration */ || ts.isObjectLiteralMethod(node));
-            switch (node.kind) {
-                case 179 /* FunctionExpression */:
-                case 180 /* ArrowFunction */:
-                    return isContextSensitiveFunctionLikeDeclaration(node);
-                case 171 /* ObjectLiteralExpression */:
-                    return ts.forEach(node.properties, isContextSensitive);
-                case 170 /* ArrayLiteralExpression */:
-                    return ts.forEach(node.elements, isContextSensitive);
-                case 188 /* ConditionalExpression */:
-                    return isContextSensitive(node.whenTrue) ||
-                        isContextSensitive(node.whenFalse);
-                case 187 /* BinaryExpression */:
-                    return node.operatorToken.kind === 52 /* BarBarToken */ &&
-                        (isContextSensitive(node.left) || isContextSensitive(node.right));
-                case 253 /* PropertyAssignment */:
-                    return isContextSensitive(node.initializer);
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                    return isContextSensitiveFunctionLikeDeclaration(node);
-                case 178 /* ParenthesizedExpression */:
-                    return isContextSensitive(node.expression);
-            }
-            return false;
-        }
-        function isContextSensitiveFunctionLikeDeclaration(node) {
-            var areAllParametersUntyped = !ts.forEach(node.parameters, function (p) { return p.type; });
-            var isNullaryArrow = node.kind === 180 /* ArrowFunction */ && !node.parameters.length;
-            return !node.typeParameters && areAllParametersUntyped && !isNullaryArrow;
-        }
-        function isContextSensitiveFunctionOrObjectLiteralMethod(func) {
-            return (isFunctionExpressionOrArrowFunction(func) || ts.isObjectLiteralMethod(func)) && isContextSensitiveFunctionLikeDeclaration(func);
-        }
-        function getTypeWithoutSignatures(type) {
-            if (type.flags & 2588672 /* ObjectType */) {
-                var resolved = resolveStructuredTypeMembers(type);
-                if (resolved.constructSignatures.length) {
-                    var result = createObjectType(2097152 /* Anonymous */, type.symbol);
-                    result.members = resolved.members;
-                    result.properties = resolved.properties;
-                    result.callSignatures = emptyArray;
-                    result.constructSignatures = emptyArray;
-                    type = result;
+            // If object literal is contextually typed by the implied type of a binding pattern, augment the result
+            // type with those properties for which the binding pattern specifies a default value.
+            if (contextualTypeHasPattern) {
+                for (var _i = 0, _a = getPropertiesOfType(contextualType); _i < _a.length; _i++) {
+                    var prop = _a[_i];
+                    if (!propertiesTable.get(prop.name)) {
+                        if (!(prop.flags & 67108864 /* Optional */)) {
+                            error(prop.valueDeclaration || prop.bindingElement, ts.Diagnostics.Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value);
+                        }
+                        propertiesTable.set(prop.name, prop);
+                        propertiesArray.push(prop);
+                    }
                 }
             }
-            return type;
-        }
-        // TYPE CHECKING
-        function isTypeIdenticalTo(source, target) {
-            return isTypeRelatedTo(source, target, identityRelation);
-        }
-        function compareTypesIdentical(source, target) {
-            return isTypeRelatedTo(source, target, identityRelation) ? -1 /* True */ : 0 /* False */;
-        }
-        function compareTypesAssignable(source, target) {
-            return isTypeRelatedTo(source, target, assignableRelation) ? -1 /* True */ : 0 /* False */;
+            if (spread !== emptyObjectType) {
+                if (propertiesArray.length > 0) {
+                    spread = getSpreadType(spread, createObjectLiteralType());
+                }
+                if (spread.flags & 32768 /* Object */) {
+                    // only set the symbol and flags if this is a (fresh) object type
+                    spread.flags |= propagatedFlags;
+                    spread.flags |= 1048576 /* FreshLiteral */;
+                    spread.objectFlags |= 128 /* ObjectLiteral */;
+                    spread.symbol = node.symbol;
+                }
+                return spread;
+            }
+            return createObjectLiteralType();
+            function createObjectLiteralType() {
+                var stringIndexInfo = isJSObjectLiteral ? jsObjectLiteralIndexInfo : hasComputedStringProperty ? getObjectLiteralIndexInfo(node.properties, offset, propertiesArray, 0 /* String */) : undefined;
+                var numberIndexInfo = hasComputedNumberProperty && !isJSObjectLiteral ? getObjectLiteralIndexInfo(node.properties, offset, propertiesArray, 1 /* Number */) : undefined;
+                var result = createAnonymousType(node.symbol, propertiesTable, emptyArray, emptyArray, stringIndexInfo, numberIndexInfo);
+                var freshObjectLiteralFlag = compilerOptions.suppressExcessPropertyErrors ? 0 : 1048576 /* FreshLiteral */;
+                result.flags |= 4194304 /* ContainsObjectLiteral */ | freshObjectLiteralFlag | (typeFlags & 14680064 /* PropagatingFlags */);
+                result.objectFlags |= 128 /* ObjectLiteral */;
+                if (patternWithComputedProperties) {
+                    result.objectFlags |= 512 /* ObjectLiteralPatternWithComputedProperties */;
+                }
+                if (inDestructuringPattern) {
+                    result.pattern = node;
+                }
+                if (!(result.flags & 6144 /* Nullable */)) {
+                    propagatedFlags |= (result.flags & 14680064 /* PropagatingFlags */);
+                }
+                return result;
+            }
         }
-        function isTypeSubtypeOf(source, target) {
-            return isTypeRelatedTo(source, target, subtypeRelation);
+        function isValidSpreadType(type) {
+            return !!(type.flags & (1 /* Any */ | 4096 /* Null */ | 2048 /* Undefined */ | 16777216 /* NonPrimitive */) ||
+                type.flags & 32768 /* Object */ && !isGenericMappedType(type) ||
+                type.flags & 196608 /* UnionOrIntersection */ && !ts.forEach(type.types, function (t) { return !isValidSpreadType(t); }));
         }
-        function isTypeAssignableTo(source, target) {
-            return isTypeRelatedTo(source, target, assignableRelation);
+        function checkJsxSelfClosingElement(node) {
+            checkJsxOpeningLikeElement(node);
+            return getJsxGlobalElementType() || anyType;
         }
-        // A type S is considered to be an instance of a type T if S and T are the same type or if S is a
-        // subtype of T but not structurally identical to T. This specifically means that two distinct but
-        // structurally identical types (such as two classes) are not considered instances of each other.
-        function isTypeInstanceOf(source, target) {
-            return source === target || isTypeSubtypeOf(source, target) && !isTypeIdenticalTo(source, target);
+        function checkJsxElement(node) {
+            // Check attributes
+            checkJsxOpeningLikeElement(node.openingElement);
+            // Perform resolution on the closing tag so that rename/go to definition/etc work
+            if (isJsxIntrinsicIdentifier(node.closingElement.tagName)) {
+                getIntrinsicTagSymbol(node.closingElement);
+            }
+            else {
+                checkExpression(node.closingElement.tagName);
+            }
+            return getJsxGlobalElementType() || anyType;
         }
         /**
-         * This is *not* a bi-directional relationship.
-         * If one needs to check both directions for comparability, use a second call to this function or 'checkTypeComparableTo'.
+         * Returns true iff the JSX element name would be a valid JS identifier, ignoring restrictions about keywords not being identifiers
          */
-        function isTypeComparableTo(source, target) {
-            return isTypeRelatedTo(source, target, comparableRelation);
-        }
-        function areTypesComparable(type1, type2) {
-            return isTypeComparableTo(type1, type2) || isTypeComparableTo(type2, type1);
-        }
-        function checkTypeSubtypeOf(source, target, errorNode, headMessage, containingMessageChain) {
-            return checkTypeRelatedTo(source, target, subtypeRelation, errorNode, headMessage, containingMessageChain);
-        }
-        function checkTypeAssignableTo(source, target, errorNode, headMessage, containingMessageChain) {
-            return checkTypeRelatedTo(source, target, assignableRelation, errorNode, headMessage, containingMessageChain);
+        function isUnhyphenatedJsxName(name) {
+            // - is the only character supported in JSX attribute names that isn't valid in JavaScript identifiers
+            return name.indexOf("-") < 0;
         }
         /**
-         * This is *not* a bi-directional relationship.
-         * If one needs to check both directions for comparability, use a second call to this function or 'isTypeComparableTo'.
+         * Returns true iff React would emit this tag name as a string rather than an identifier or qualified name
          */
-        function checkTypeComparableTo(source, target, errorNode, headMessage, containingMessageChain) {
-            return checkTypeRelatedTo(source, target, comparableRelation, errorNode, headMessage, containingMessageChain);
-        }
-        function isSignatureAssignableTo(source, target, ignoreReturnTypes) {
-            return compareSignaturesRelated(source, target, ignoreReturnTypes, /*reportErrors*/ false, /*errorReporter*/ undefined, compareTypesAssignable) !== 0 /* False */;
+        function isJsxIntrinsicIdentifier(tagName) {
+            // TODO (yuisu): comment
+            if (tagName.kind === 179 /* PropertyAccessExpression */ || tagName.kind === 99 /* ThisKeyword */) {
+                return false;
+            }
+            else {
+                return ts.isIntrinsicJsxName(tagName.text);
+            }
         }
         /**
-         * See signatureRelatedTo, compareSignaturesIdentical
+         * Get attributes type of the JSX opening-like element. The result is from resolving "attributes" property of the opening-like element.
+         *
+         * @param openingLikeElement a JSX opening-like element
+         * @param filter a function to remove attributes that will not participate in checking whether attributes are assignable
+         * @return an anonymous type (similar to the one returned by checkObjectLiteral) in which its properties are attributes property.
+         * @remarks Because this function calls getSpreadType, it needs to use the same checks as checkObjectLiteral,
+         * which also calls getSpreadType.
          */
-        function compareSignaturesRelated(source, target, ignoreReturnTypes, reportErrors, errorReporter, compareTypes) {
-            // TODO (drosen): De-duplicate code between related functions.
-            if (source === target) {
-                return -1 /* True */;
-            }
-            if (!target.hasRestParameter && source.minArgumentCount > target.parameters.length) {
-                return 0 /* False */;
-            }
-            // Spec 1.0 Section 3.8.3 & 3.8.4:
-            // M and N (the signatures) are instantiated using type Any as the type argument for all type parameters declared by M and N
-            source = getErasedSignature(source);
-            target = getErasedSignature(target);
-            var result = -1 /* True */;
-            var sourceThisType = getThisTypeOfSignature(source);
-            if (sourceThisType && sourceThisType !== voidType) {
-                var targetThisType = getThisTypeOfSignature(target);
-                if (targetThisType) {
-                    // void sources are assignable to anything.
-                    var related = compareTypes(sourceThisType, targetThisType, /*reportErrors*/ false)
-                        || compareTypes(targetThisType, sourceThisType, reportErrors);
-                    if (!related) {
-                        if (reportErrors) {
-                            errorReporter(ts.Diagnostics.The_this_types_of_each_signature_are_incompatible);
-                        }
-                        return 0 /* False */;
+        function createJsxAttributesTypeFromAttributesProperty(openingLikeElement, filter, checkMode) {
+            var attributes = openingLikeElement.attributes;
+            var attributesTable = ts.createMap();
+            var spread = emptyObjectType;
+            var attributesArray = [];
+            var hasSpreadAnyType = false;
+            var typeToIntersect;
+            var explicitlySpecifyChildrenAttribute = false;
+            var jsxChildrenPropertyName = getJsxElementChildrenPropertyname();
+            for (var _i = 0, _a = attributes.properties; _i < _a.length; _i++) {
+                var attributeDecl = _a[_i];
+                var member = attributeDecl.symbol;
+                if (ts.isJsxAttribute(attributeDecl)) {
+                    var exprType = attributeDecl.initializer ?
+                        checkExpression(attributeDecl.initializer, checkMode) :
+                        trueType; // <Elem attr /> is sugar for <Elem attr={true} />
+                    var attributeSymbol = createSymbol(4 /* Property */ | 134217728 /* Transient */ | member.flags, member.name);
+                    attributeSymbol.declarations = member.declarations;
+                    attributeSymbol.parent = member.parent;
+                    if (member.valueDeclaration) {
+                        attributeSymbol.valueDeclaration = member.valueDeclaration;
+                    }
+                    attributeSymbol.type = exprType;
+                    attributeSymbol.target = member;
+                    attributesTable.set(attributeSymbol.name, attributeSymbol);
+                    attributesArray.push(attributeSymbol);
+                    if (attributeDecl.name.text === jsxChildrenPropertyName) {
+                        explicitlySpecifyChildrenAttribute = true;
                     }
-                    result &= related;
                 }
-            }
-            var sourceMax = getNumNonRestParameters(source);
-            var targetMax = getNumNonRestParameters(target);
-            var checkCount = getNumParametersToCheckForSignatureRelatability(source, sourceMax, target, targetMax);
-            var sourceParams = source.parameters;
-            var targetParams = target.parameters;
-            for (var i = 0; i < checkCount; i++) {
-                var s = i < sourceMax ? getTypeOfParameter(sourceParams[i]) : getRestTypeOfSignature(source);
-                var t = i < targetMax ? getTypeOfParameter(targetParams[i]) : getRestTypeOfSignature(target);
-                var related = compareTypes(s, t, /*reportErrors*/ false) || compareTypes(t, s, reportErrors);
-                if (!related) {
-                    if (reportErrors) {
-                        errorReporter(ts.Diagnostics.Types_of_parameters_0_and_1_are_incompatible, sourceParams[i < sourceMax ? i : sourceMax].name, targetParams[i < targetMax ? i : targetMax].name);
+                else {
+                    ts.Debug.assert(attributeDecl.kind === 255 /* JsxSpreadAttribute */);
+                    if (attributesArray.length > 0) {
+                        spread = getSpreadType(spread, createJsxAttributesType(attributes.symbol, attributesTable));
+                        attributesArray = [];
+                        attributesTable = ts.createMap();
+                    }
+                    var exprType = checkExpression(attributeDecl.expression);
+                    if (isTypeAny(exprType)) {
+                        hasSpreadAnyType = true;
+                    }
+                    if (isValidSpreadType(exprType)) {
+                        spread = getSpreadType(spread, exprType);
+                    }
+                    else {
+                        typeToIntersect = typeToIntersect ? getIntersectionType([typeToIntersect, exprType]) : exprType;
                     }
-                    return 0 /* False */;
                 }
-                result &= related;
             }
-            if (!ignoreReturnTypes) {
-                var targetReturnType = getReturnTypeOfSignature(target);
-                if (targetReturnType === voidType) {
-                    return result;
-                }
-                var sourceReturnType = getReturnTypeOfSignature(source);
-                // The following block preserves behavior forbidding boolean returning functions from being assignable to type guard returning functions
-                if (target.typePredicate) {
-                    if (source.typePredicate) {
-                        result &= compareTypePredicateRelatedTo(source.typePredicate, target.typePredicate, reportErrors, errorReporter, compareTypes);
-                    }
-                    else if (ts.isIdentifierTypePredicate(target.typePredicate)) {
-                        if (reportErrors) {
-                            errorReporter(ts.Diagnostics.Signature_0_must_have_a_type_predicate, signatureToString(source));
-                        }
-                        return 0 /* False */;
+            if (!hasSpreadAnyType) {
+                if (spread !== emptyObjectType) {
+                    if (attributesArray.length > 0) {
+                        spread = getSpreadType(spread, createJsxAttributesType(attributes.symbol, attributesTable));
                     }
+                    attributesArray = getPropertiesOfType(spread);
                 }
-                else {
-                    result &= compareTypes(sourceReturnType, targetReturnType, reportErrors);
+                attributesTable = ts.createMap();
+                for (var _b = 0, attributesArray_1 = attributesArray; _b < attributesArray_1.length; _b++) {
+                    var attr = attributesArray_1[_b];
+                    if (!filter || filter(attr)) {
+                        attributesTable.set(attr.name, attr);
+                    }
                 }
             }
-            return result;
-        }
-        function compareTypePredicateRelatedTo(source, target, reportErrors, errorReporter, compareTypes) {
-            if (source.kind !== target.kind) {
-                if (reportErrors) {
-                    errorReporter(ts.Diagnostics.A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard);
-                    errorReporter(ts.Diagnostics.Type_predicate_0_is_not_assignable_to_1, typePredicateToString(source), typePredicateToString(target));
+            // Handle children attribute
+            var parent = openingLikeElement.parent.kind === 249 /* JsxElement */ ? openingLikeElement.parent : undefined;
+            // We have to check that openingElement of the parent is the one we are visiting as this may not be true for selfClosingElement
+            if (parent && parent.openingElement === openingLikeElement && parent.children.length > 0) {
+                var childrenTypes = [];
+                for (var _c = 0, _d = parent.children; _c < _d.length; _c++) {
+                    var child = _d[_c];
+                    // In React, JSX text that contains only whitespaces will be ignored so we don't want to type-check that
+                    // because then type of children property will have constituent of string type.
+                    if (child.kind === 10 /* JsxText */) {
+                        if (!child.containsOnlyWhiteSpaces) {
+                            childrenTypes.push(stringType);
+                        }
+                    }
+                    else {
+                        childrenTypes.push(checkExpression(child, checkMode));
+                    }
                 }
-                return 0 /* False */;
-            }
-            if (source.kind === 1 /* Identifier */) {
-                var sourceIdentifierPredicate = source;
-                var targetIdentifierPredicate = target;
-                if (sourceIdentifierPredicate.parameterIndex !== targetIdentifierPredicate.parameterIndex) {
-                    if (reportErrors) {
-                        errorReporter(ts.Diagnostics.Parameter_0_is_not_in_the_same_position_as_parameter_1, sourceIdentifierPredicate.parameterName, targetIdentifierPredicate.parameterName);
-                        errorReporter(ts.Diagnostics.Type_predicate_0_is_not_assignable_to_1, typePredicateToString(source), typePredicateToString(target));
+                if (!hasSpreadAnyType && jsxChildrenPropertyName && jsxChildrenPropertyName !== "") {
+                    // Error if there is a attribute named "children" explicitly specified and children element.
+                    // This is because children element will overwrite the value from attributes.
+                    // Note: we will not warn "children" attribute overwritten if "children" attribute is specified in object spread.
+                    if (explicitlySpecifyChildrenAttribute) {
+                        error(attributes, ts.Diagnostics._0_are_specified_twice_The_attribute_named_0_will_be_overwritten, jsxChildrenPropertyName);
                     }
-                    return 0 /* False */;
+                    // If there are children in the body of JSX element, create dummy attribute "children" with anyType so that it will pass the attribute checking process
+                    var childrenPropSymbol = createSymbol(4 /* Property */ | 134217728 /* Transient */, jsxChildrenPropertyName);
+                    childrenPropSymbol.type = childrenTypes.length === 1 ?
+                        childrenTypes[0] :
+                        createArrayType(getUnionType(childrenTypes, /*subtypeReduction*/ false));
+                    attributesTable.set(jsxChildrenPropertyName, childrenPropSymbol);
                 }
             }
-            var related = compareTypes(source.type, target.type, reportErrors);
-            if (related === 0 /* False */ && reportErrors) {
-                errorReporter(ts.Diagnostics.Type_predicate_0_is_not_assignable_to_1, typePredicateToString(source), typePredicateToString(target));
+            if (hasSpreadAnyType) {
+                return anyType;
             }
-            return related;
-        }
-        function isImplementationCompatibleWithOverload(implementation, overload) {
-            var erasedSource = getErasedSignature(implementation);
-            var erasedTarget = getErasedSignature(overload);
-            // First see if the return types are compatible in either direction.
-            var sourceReturnType = getReturnTypeOfSignature(erasedSource);
-            var targetReturnType = getReturnTypeOfSignature(erasedTarget);
-            if (targetReturnType === voidType
-                || isTypeRelatedTo(targetReturnType, sourceReturnType, assignableRelation)
-                || isTypeRelatedTo(sourceReturnType, targetReturnType, assignableRelation)) {
-                return isSignatureAssignableTo(erasedSource, erasedTarget, /*ignoreReturnTypes*/ true);
+            var attributeType = createJsxAttributesType(attributes.symbol, attributesTable);
+            return typeToIntersect && attributesTable.size ? getIntersectionType([typeToIntersect, attributeType]) :
+                typeToIntersect ? typeToIntersect : attributeType;
+            /**
+             * Create anonymous type from given attributes symbol table.
+             * @param symbol a symbol of JsxAttributes containing attributes corresponding to attributesTable
+             * @param attributesTable a symbol table of attributes property
+             */
+            function createJsxAttributesType(symbol, attributesTable) {
+                var result = createAnonymousType(symbol, attributesTable, emptyArray, emptyArray, /*stringIndexInfo*/ undefined, /*numberIndexInfo*/ undefined);
+                result.flags |= 33554432 /* JsxAttributes */ | 4194304 /* ContainsObjectLiteral */;
+                result.objectFlags |= 128 /* ObjectLiteral */;
+                return result;
             }
-            return false;
         }
-        function getNumNonRestParameters(signature) {
-            var numParams = signature.parameters.length;
-            return signature.hasRestParameter ?
-                numParams - 1 :
-                numParams;
+        /**
+         * Check attributes property of opening-like element. This function is called during chooseOverload to get call signature of a JSX opening-like element.
+         * (See "checkApplicableSignatureForJsxOpeningLikeElement" for how the function is used)
+         * @param node a JSXAttributes to be resolved of its type
+         */
+        function checkJsxAttributes(node, checkMode) {
+            return createJsxAttributesTypeFromAttributesProperty(node.parent, /*filter*/ undefined, checkMode);
         }
-        function getNumParametersToCheckForSignatureRelatability(source, sourceNonRestParamCount, target, targetNonRestParamCount) {
-            if (source.hasRestParameter === target.hasRestParameter) {
-                if (source.hasRestParameter) {
-                    // If both have rest parameters, get the max and add 1 to
-                    // compensate for the rest parameter.
-                    return Math.max(sourceNonRestParamCount, targetNonRestParamCount) + 1;
+        function getJsxType(name) {
+            var jsxType = jsxTypes.get(name);
+            if (jsxType === undefined) {
+                jsxTypes.set(name, jsxType = getExportedTypeFromNamespace(JsxNames.JSX, name) || unknownType);
+            }
+            return jsxType;
+        }
+        /**
+         * Looks up an intrinsic tag name and returns a symbol that either points to an intrinsic
+         * property (in which case nodeLinks.jsxFlags will be IntrinsicNamedElement) or an intrinsic
+         * string index signature (in which case nodeLinks.jsxFlags will be IntrinsicIndexedElement).
+         * May also return unknownSymbol if both of these lookups fail.
+         */
+        function getIntrinsicTagSymbol(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedSymbol) {
+                var intrinsicElementsType = getJsxType(JsxNames.IntrinsicElements);
+                if (intrinsicElementsType !== unknownType) {
+                    // Property case
+                    var intrinsicProp = getPropertyOfType(intrinsicElementsType, node.tagName.text);
+                    if (intrinsicProp) {
+                        links.jsxFlags |= 1 /* IntrinsicNamedElement */;
+                        return links.resolvedSymbol = intrinsicProp;
+                    }
+                    // Intrinsic string indexer case
+                    var indexSignatureType = getIndexTypeOfType(intrinsicElementsType, 0 /* String */);
+                    if (indexSignatureType) {
+                        links.jsxFlags |= 2 /* IntrinsicIndexedElement */;
+                        return links.resolvedSymbol = intrinsicElementsType.symbol;
+                    }
+                    // Wasn't found
+                    error(node, ts.Diagnostics.Property_0_does_not_exist_on_type_1, node.tagName.text, "JSX." + JsxNames.IntrinsicElements);
+                    return links.resolvedSymbol = unknownSymbol;
                 }
                 else {
-                    return Math.min(sourceNonRestParamCount, targetNonRestParamCount);
+                    if (noImplicitAny) {
+                        error(node, ts.Diagnostics.JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists, JsxNames.IntrinsicElements);
+                    }
+                    return links.resolvedSymbol = unknownSymbol;
                 }
             }
-            else {
-                // Return the count for whichever signature doesn't have rest parameters.
-                return source.hasRestParameter ?
-                    targetNonRestParamCount :
-                    sourceNonRestParamCount;
-            }
+            return links.resolvedSymbol;
         }
-        function isEnumTypeRelatedTo(source, target, errorReporter) {
-            if (source === target) {
-                return true;
-            }
-            var id = source.id + "," + target.id;
-            if (enumRelation[id] !== undefined) {
-                return enumRelation[id];
+        /**
+         * Given a JSX element that is a class element, finds the Element Instance Type. If the
+         * element is not a class element, or the class element type cannot be determined, returns 'undefined'.
+         * For example, in the element <MyClass>, the element instance type is `MyClass` (not `typeof MyClass`).
+         */
+        function getJsxElementInstanceType(node, valueType) {
+            ts.Debug.assert(!(valueType.flags & 65536 /* Union */));
+            if (isTypeAny(valueType)) {
+                // Short-circuit if the class tag is using an element type 'any'
+                return anyType;
             }
-            if (source.symbol.name !== target.symbol.name ||
-                !(source.symbol.flags & 256 /* RegularEnum */) || !(target.symbol.flags & 256 /* RegularEnum */) ||
-                (source.flags & 524288 /* Union */) !== (target.flags & 524288 /* Union */)) {
-                return enumRelation[id] = false;
+            // Resolve the signatures, preferring constructor
+            var signatures = getSignaturesOfType(valueType, 1 /* Construct */);
+            if (signatures.length === 0) {
+                // No construct signatures, try call signatures
+                signatures = getSignaturesOfType(valueType, 0 /* Call */);
+                if (signatures.length === 0) {
+                    // We found no signatures at all, which is an error
+                    error(node.tagName, ts.Diagnostics.JSX_element_type_0_does_not_have_any_construct_or_call_signatures, ts.getTextOfNode(node.tagName));
+                    return unknownType;
+                }
             }
-            var targetEnumType = getTypeOfSymbol(target.symbol);
-            for (var _i = 0, _a = getPropertiesOfType(getTypeOfSymbol(source.symbol)); _i < _a.length; _i++) {
-                var property = _a[_i];
-                if (property.flags & 8 /* EnumMember */) {
-                    var targetProperty = getPropertyOfType(targetEnumType, property.name);
-                    if (!targetProperty || !(targetProperty.flags & 8 /* EnumMember */)) {
-                        if (errorReporter) {
-                            errorReporter(ts.Diagnostics.Property_0_is_missing_in_type_1, property.name, typeToString(target, /*enclosingDeclaration*/ undefined, 128 /* UseFullyQualifiedType */));
-                        }
-                        return enumRelation[id] = false;
-                    }
+            var instantiatedSignatures = [];
+            for (var _i = 0, signatures_3 = signatures; _i < signatures_3.length; _i++) {
+                var signature = signatures_3[_i];
+                if (signature.typeParameters) {
+                    var typeArguments = fillMissingTypeArguments(/*typeArguments*/ undefined, signature.typeParameters, /*minTypeArgumentCount*/ 0);
+                    instantiatedSignatures.push(getSignatureInstantiation(signature, typeArguments));
+                }
+                else {
+                    instantiatedSignatures.push(signature);
                 }
             }
-            return enumRelation[id] = true;
+            return getUnionType(ts.map(instantiatedSignatures, getReturnTypeOfSignature), /*subtypeReduction*/ true);
         }
-        function isSimpleTypeRelatedTo(source, target, relation, errorReporter) {
-            if (target.flags & 8192 /* Never */)
-                return false;
-            if (target.flags & 1 /* Any */ || source.flags & 8192 /* Never */)
-                return true;
-            if (source.flags & 34 /* StringLike */ && target.flags & 2 /* String */)
-                return true;
-            if (source.flags & 340 /* NumberLike */ && target.flags & 4 /* Number */)
-                return true;
-            if (source.flags & 136 /* BooleanLike */ && target.flags & 8 /* Boolean */)
-                return true;
-            if (source.flags & 256 /* EnumLiteral */ && target.flags & 16 /* Enum */ && source.baseType === target)
-                return true;
-            if (source.flags & 16 /* Enum */ && target.flags & 16 /* Enum */ && isEnumTypeRelatedTo(source, target, errorReporter))
-                return true;
-            if (source.flags & 2048 /* Undefined */ && (!strictNullChecks || target.flags & (2048 /* Undefined */ | 1024 /* Void */)))
-                return true;
-            if (source.flags & 4096 /* Null */ && (!strictNullChecks || target.flags & 4096 /* Null */))
-                return true;
-            if (relation === assignableRelation || relation === comparableRelation) {
-                if (source.flags & 1 /* Any */)
-                    return true;
-                if ((source.flags & 4 /* Number */ | source.flags & 64 /* NumberLiteral */) && target.flags & 272 /* EnumLike */)
-                    return true;
-                if (source.flags & 256 /* EnumLiteral */ &&
-                    target.flags & 256 /* EnumLiteral */ &&
-                    source.text === target.text &&
-                    isEnumTypeRelatedTo(source.baseType, target.baseType, errorReporter)) {
-                    return true;
+        /**
+         * Look into JSX namespace and then look for container with matching name as nameOfAttribPropContainer.
+         * Get a single property from that container if existed. Report an error if there are more than one property.
+         *
+         * @param nameOfAttribPropContainer a string of value JsxNames.ElementAttributesPropertyNameContainer or JsxNames.ElementChildrenAttributeNameContainer
+         *          if other string is given or the container doesn't exist, return undefined.
+         */
+        function getNameFromJsxElementAttributesContainer(nameOfAttribPropContainer) {
+            // JSX
+            var jsxNamespace = getGlobalSymbol(JsxNames.JSX, 1920 /* Namespace */, /*diagnosticMessage*/ undefined);
+            // JSX.ElementAttributesProperty | JSX.ElementChildrenAttribute [symbol]
+            var jsxElementAttribPropInterfaceSym = jsxNamespace && getSymbol(jsxNamespace.exports, nameOfAttribPropContainer, 793064 /* Type */);
+            // JSX.ElementAttributesProperty | JSX.ElementChildrenAttribute [type]
+            var jsxElementAttribPropInterfaceType = jsxElementAttribPropInterfaceSym && getDeclaredTypeOfSymbol(jsxElementAttribPropInterfaceSym);
+            // The properties of JSX.ElementAttributesProperty | JSX.ElementChildrenAttribute
+            var propertiesOfJsxElementAttribPropInterface = jsxElementAttribPropInterfaceType && getPropertiesOfType(jsxElementAttribPropInterfaceType);
+            if (propertiesOfJsxElementAttribPropInterface) {
+                // Element Attributes has zero properties, so the element attributes type will be the class instance type
+                if (propertiesOfJsxElementAttribPropInterface.length === 0) {
+                    return "";
                 }
-                if (source.flags & 256 /* EnumLiteral */ &&
-                    target.flags & 16 /* Enum */ &&
-                    isEnumTypeRelatedTo(target, source.baseType, errorReporter)) {
-                    return true;
+                else if (propertiesOfJsxElementAttribPropInterface.length === 1) {
+                    return propertiesOfJsxElementAttribPropInterface[0].name;
+                }
+                else if (propertiesOfJsxElementAttribPropInterface.length > 1) {
+                    // More than one property on ElementAttributesProperty is an error
+                    error(jsxElementAttribPropInterfaceSym.declarations[0], ts.Diagnostics.The_global_type_JSX_0_may_not_have_more_than_one_property, nameOfAttribPropContainer);
                 }
             }
-            return false;
+            return undefined;
         }
-        function isTypeRelatedTo(source, target, relation) {
-            if (source.flags & 96 /* StringOrNumberLiteral */ && source.flags & 16777216 /* FreshLiteral */) {
-                source = source.regularType;
+        /// e.g. "props" for React.d.ts,
+        /// or 'undefined' if ElementAttributesProperty doesn't exist (which means all
+        ///     non-intrinsic elements' attributes type is 'any'),
+        /// or '' if it has 0 properties (which means every
+        ///     non-intrinsic elements' attributes type is the element instance type)
+        function getJsxElementPropertiesName() {
+            if (!_hasComputedJsxElementPropertiesName) {
+                _hasComputedJsxElementPropertiesName = true;
+                _jsxElementPropertiesName = getNameFromJsxElementAttributesContainer(JsxNames.ElementAttributesPropertyNameContainer);
             }
-            if (target.flags & 96 /* StringOrNumberLiteral */ && target.flags & 16777216 /* FreshLiteral */) {
-                target = target.regularType;
+            return _jsxElementPropertiesName;
+        }
+        function getJsxElementChildrenPropertyname() {
+            if (!_hasComputedJsxElementChildrenPropertyName) {
+                _hasComputedJsxElementChildrenPropertyName = true;
+                _jsxElementChildrenPropertyName = getNameFromJsxElementAttributesContainer(JsxNames.ElementChildrenAttributeNameContainer);
             }
-            if (source === target || relation !== identityRelation && isSimpleTypeRelatedTo(source, target, relation)) {
-                return true;
+            return _jsxElementChildrenPropertyName;
+        }
+        function getApparentTypeOfJsxPropsType(propsType) {
+            if (!propsType) {
+                return undefined;
             }
-            if (source.flags & 2588672 /* ObjectType */ && target.flags & 2588672 /* ObjectType */) {
-                var id = relation !== identityRelation || source.id < target.id ? source.id + "," + target.id : target.id + "," + source.id;
-                var related = relation[id];
-                if (related !== undefined) {
-                    return related === 1 /* Succeeded */;
+            if (propsType.flags & 131072 /* Intersection */) {
+                var propsApparentType = [];
+                for (var _i = 0, _a = propsType.types; _i < _a.length; _i++) {
+                    var t = _a[_i];
+                    propsApparentType.push(getApparentType(t));
                 }
+                return getIntersectionType(propsApparentType);
             }
-            if (source.flags & 4177920 /* StructuredOrTypeParameter */ || target.flags & 4177920 /* StructuredOrTypeParameter */) {
-                return checkTypeRelatedTo(source, target, relation, undefined, undefined, undefined);
-            }
-            return false;
+            return getApparentType(propsType);
         }
         /**
-         * Checks if 'source' is related to 'target' (e.g.: is a assignable to).
-         * @param source The left-hand-side of the relation.
-         * @param target The right-hand-side of the relation.
-         * @param relation The relation considered. One of 'identityRelation', 'subtypeRelation', 'assignableRelation', or 'comparableRelation'.
-         * Used as both to determine which checks are performed and as a cache of previously computed results.
-         * @param errorNode The suggested node upon which all errors will be reported, if defined. This may or may not be the actual node used.
-         * @param headMessage If the error chain should be prepended by a head message, then headMessage will be used.
-         * @param containingMessageChain A chain of errors to prepend any new errors found.
+         * Get JSX attributes type by trying to resolve openingLikeElement as a stateless function component.
+         * Return only attributes type of successfully resolved call signature.
+         * This function assumes that the caller handled other possible element type of the JSX element (e.g. stateful component)
+         * Unlike tryGetAllJsxStatelessFunctionAttributesType, this function is a default behavior of type-checkers.
+         * @param openingLikeElement a JSX opening-like element to find attributes type
+         * @param elementType a type of the opening-like element. This elementType can't be an union type
+         * @param elemInstanceType an element instance type (the result of newing or invoking this tag)
+         * @param elementClassType a JSX-ElementClass type. This is a result of looking up ElementClass interface in the JSX global
          */
-        function checkTypeRelatedTo(source, target, relation, errorNode, headMessage, containingMessageChain) {
-            var errorInfo;
-            var sourceStack;
-            var targetStack;
-            var maybeStack;
-            var expandingFlags;
-            var depth = 0;
-            var overflow = false;
-            ts.Debug.assert(relation !== identityRelation || !errorNode, "no error reporting in identity checking");
-            var result = isRelatedTo(source, target, /*reportErrors*/ !!errorNode, headMessage);
-            if (overflow) {
-                error(errorNode, ts.Diagnostics.Excessive_stack_depth_comparing_types_0_and_1, typeToString(source), typeToString(target));
+        function defaultTryGetJsxStatelessFunctionAttributesType(openingLikeElement, elementType, elemInstanceType, elementClassType) {
+            ts.Debug.assert(!(elementType.flags & 65536 /* Union */));
+            if (!elementClassType || !isTypeAssignableTo(elemInstanceType, elementClassType)) {
+                var jsxStatelessElementType = getJsxGlobalStatelessElementType();
+                if (jsxStatelessElementType) {
+                    // We don't call getResolvedSignature here because we have already resolve the type of JSX Element.
+                    var callSignature = getResolvedJsxStatelessFunctionSignature(openingLikeElement, elementType, /*candidatesOutArray*/ undefined);
+                    if (callSignature !== unknownSignature) {
+                        var callReturnType = callSignature && getReturnTypeOfSignature(callSignature);
+                        var paramType = callReturnType && (callSignature.parameters.length === 0 ? emptyObjectType : getTypeOfSymbol(callSignature.parameters[0]));
+                        paramType = getApparentTypeOfJsxPropsType(paramType);
+                        if (callReturnType && isTypeAssignableTo(callReturnType, jsxStatelessElementType)) {
+                            // Intersect in JSX.IntrinsicAttributes if it exists
+                            var intrinsicAttributes = getJsxType(JsxNames.IntrinsicAttributes);
+                            if (intrinsicAttributes !== unknownType) {
+                                paramType = intersectTypes(intrinsicAttributes, paramType);
+                            }
+                            return paramType;
+                        }
+                    }
+                }
             }
-            else if (errorInfo) {
-                if (containingMessageChain) {
-                    errorInfo = ts.concatenateDiagnosticMessageChains(containingMessageChain, errorInfo);
+            return undefined;
+        }
+        /**
+         * Get JSX attributes type by trying to resolve openingLikeElement as a stateless function component.
+         * Return all attributes type of resolved call signature including candidate signatures.
+         * This function assumes that the caller handled other possible element type of the JSX element.
+         * This function is a behavior used by language service when looking up completion in JSX element.
+         * @param openingLikeElement a JSX opening-like element to find attributes type
+         * @param elementType a type of the opening-like element. This elementType can't be an union type
+         * @param elemInstanceType an element instance type (the result of newing or invoking this tag)
+         * @param elementClassType a JSX-ElementClass type. This is a result of looking up ElementClass interface in the JSX global
+         */
+        function tryGetAllJsxStatelessFunctionAttributesType(openingLikeElement, elementType, elemInstanceType, elementClassType) {
+            ts.Debug.assert(!(elementType.flags & 65536 /* Union */));
+            if (!elementClassType || !isTypeAssignableTo(elemInstanceType, elementClassType)) {
+                // Is this is a stateless function component? See if its single signature's return type is assignable to the JSX Element Type
+                var jsxStatelessElementType = getJsxGlobalStatelessElementType();
+                if (jsxStatelessElementType) {
+                    // We don't call getResolvedSignature because here we have already resolve the type of JSX Element.
+                    var candidatesOutArray = [];
+                    getResolvedJsxStatelessFunctionSignature(openingLikeElement, elementType, candidatesOutArray);
+                    var result = void 0;
+                    var allMatchingAttributesType = void 0;
+                    for (var _i = 0, candidatesOutArray_1 = candidatesOutArray; _i < candidatesOutArray_1.length; _i++) {
+                        var candidate = candidatesOutArray_1[_i];
+                        var callReturnType = getReturnTypeOfSignature(candidate);
+                        var paramType = callReturnType && (candidate.parameters.length === 0 ? emptyObjectType : getTypeOfSymbol(candidate.parameters[0]));
+                        paramType = getApparentTypeOfJsxPropsType(paramType);
+                        if (callReturnType && isTypeAssignableTo(callReturnType, jsxStatelessElementType)) {
+                            var shouldBeCandidate = true;
+                            for (var _a = 0, _b = openingLikeElement.attributes.properties; _a < _b.length; _a++) {
+                                var attribute = _b[_a];
+                                if (ts.isJsxAttribute(attribute) &&
+                                    isUnhyphenatedJsxName(attribute.name.text) &&
+                                    !getPropertyOfType(paramType, attribute.name.text)) {
+                                    shouldBeCandidate = false;
+                                    break;
+                                }
+                            }
+                            if (shouldBeCandidate) {
+                                result = intersectTypes(result, paramType);
+                            }
+                            allMatchingAttributesType = intersectTypes(allMatchingAttributesType, paramType);
+                        }
+                    }
+                    // If we can't find any matching, just return everything.
+                    if (!result) {
+                        result = allMatchingAttributesType;
+                    }
+                    // Intersect in JSX.IntrinsicAttributes if it exists
+                    var intrinsicAttributes = getJsxType(JsxNames.IntrinsicAttributes);
+                    if (intrinsicAttributes !== unknownType) {
+                        result = intersectTypes(intrinsicAttributes, result);
+                    }
+                    return result;
                 }
-                diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(errorNode, errorInfo));
             }
-            return result !== 0 /* False */;
-            function reportError(message, arg0, arg1, arg2) {
-                ts.Debug.assert(!!errorNode);
-                errorInfo = ts.chainDiagnosticMessages(errorInfo, message, arg0, arg1, arg2);
+            return undefined;
+        }
+        /**
+         * Resolve attributes type of the given opening-like element. The attributes type is a type of attributes associated with the given elementType.
+         * For instance:
+         *      declare function Foo(attr: { p1: string}): JSX.Element;
+         *      <Foo p1={10} />;  // This function will try resolve "Foo" and return an attributes type of "Foo" which is "{ p1: string }"
+         *
+         * The function is intended to initially be called from getAttributesTypeFromJsxOpeningLikeElement which already handle JSX-intrinsic-element..
+         * This function will try to resolve custom JSX attributes type in following order: string literal, stateless function, and stateful component
+         *
+         * @param openingLikeElement a non-intrinsic JSXOPeningLikeElement
+         * @param shouldIncludeAllStatelessAttributesType a boolean indicating whether to include all attributes types from all stateless function signature
+         * @param elementType an instance type of the given opening-like element. If undefined, the function will check type openinglikeElement's tagname.
+         * @param elementClassType a JSX-ElementClass type. This is a result of looking up ElementClass interface in the JSX global (imported from react.d.ts)
+         * @return attributes type if able to resolve the type of node
+         *         anyType if there is no type ElementAttributesProperty or there is an error
+         *         emptyObjectType if there is no "prop" in the element instance type
+         */
+        function resolveCustomJsxElementAttributesType(openingLikeElement, shouldIncludeAllStatelessAttributesType, elementType, elementClassType) {
+            if (!elementType) {
+                elementType = checkExpression(openingLikeElement.tagName);
             }
-            function reportRelationError(message, source, target) {
-                var sourceType = typeToString(source);
-                var targetType = typeToString(target);
-                if (sourceType === targetType) {
-                    sourceType = typeToString(source, /*enclosingDeclaration*/ undefined, 128 /* UseFullyQualifiedType */);
-                    targetType = typeToString(target, /*enclosingDeclaration*/ undefined, 128 /* UseFullyQualifiedType */);
-                }
-                if (!message) {
-                    message = relation === comparableRelation ?
-                        ts.Diagnostics.Type_0_is_not_comparable_to_type_1 :
-                        ts.Diagnostics.Type_0_is_not_assignable_to_type_1;
-                }
-                reportError(message, sourceType, targetType);
+            if (elementType.flags & 65536 /* Union */) {
+                var types = elementType.types;
+                return getUnionType(types.map(function (type) {
+                    return resolveCustomJsxElementAttributesType(openingLikeElement, shouldIncludeAllStatelessAttributesType, type, elementClassType);
+                }), /*subtypeReduction*/ true);
             }
-            function tryElaborateErrorsForPrimitivesAndObjects(source, target) {
-                var sourceType = typeToString(source);
-                var targetType = typeToString(target);
-                if ((globalStringType === source && stringType === target) ||
-                    (globalNumberType === source && numberType === target) ||
-                    (globalBooleanType === source && booleanType === target) ||
-                    (getGlobalESSymbolType() === source && esSymbolType === target)) {
-                    reportError(ts.Diagnostics._0_is_a_primitive_but_1_is_a_wrapper_object_Prefer_using_0_when_possible, targetType, sourceType);
-                }
+            // If the elemType is a string type, we have to return anyType to prevent an error downstream as we will try to find construct or call signature of the type
+            if (elementType.flags & 2 /* String */) {
+                return anyType;
             }
-            // Compare two types and return
-            // Ternary.True if they are related with no assumptions,
-            // Ternary.Maybe if they are related with assumptions of other relationships, or
-            // Ternary.False if they are not related.
-            function isRelatedTo(source, target, reportErrors, headMessage) {
-                var result;
-                if (source.flags & 96 /* StringOrNumberLiteral */ && source.flags & 16777216 /* FreshLiteral */) {
-                    source = source.regularType;
-                }
-                if (target.flags & 96 /* StringOrNumberLiteral */ && target.flags & 16777216 /* FreshLiteral */) {
-                    target = target.regularType;
-                }
-                // both types are the same - covers 'they are the same primitive type or both are Any' or the same type parameter cases
-                if (source === target)
-                    return -1 /* True */;
-                if (relation === identityRelation) {
-                    return isIdenticalTo(source, target);
-                }
-                if (isSimpleTypeRelatedTo(source, target, relation, reportErrors ? reportError : undefined))
-                    return -1 /* True */;
-                if (source.flags & 8388608 /* ObjectLiteral */ && source.flags & 16777216 /* FreshLiteral */) {
-                    if (hasExcessProperties(source, target, reportErrors)) {
-                        if (reportErrors) {
-                            reportRelationError(headMessage, source, target);
-                        }
-                        return 0 /* False */;
+            else if (elementType.flags & 32 /* StringLiteral */) {
+                // If the elemType is a stringLiteral type, we can then provide a check to make sure that the string literal type is one of the Jsx intrinsic element type
+                // For example:
+                //      var CustomTag: "h1" = "h1";
+                //      <CustomTag> Hello World </CustomTag>
+                var intrinsicElementsType = getJsxType(JsxNames.IntrinsicElements);
+                if (intrinsicElementsType !== unknownType) {
+                    var stringLiteralTypeName = elementType.value;
+                    var intrinsicProp = getPropertyOfType(intrinsicElementsType, stringLiteralTypeName);
+                    if (intrinsicProp) {
+                        return getTypeOfSymbol(intrinsicProp);
                     }
-                    // Above we check for excess properties with respect to the entire target type. When union
-                    // and intersection types are further deconstructed on the target side, we don't want to
-                    // make the check again (as it might fail for a partial target type). Therefore we obtain
-                    // the regular source type and proceed with that.
-                    if (target.flags & 1572864 /* UnionOrIntersection */) {
-                        source = getRegularTypeOfObjectLiteral(source);
+                    var indexSignatureType = getIndexTypeOfType(intrinsicElementsType, 0 /* String */);
+                    if (indexSignatureType) {
+                        return indexSignatureType;
                     }
+                    error(openingLikeElement, ts.Diagnostics.Property_0_does_not_exist_on_type_1, stringLiteralTypeName, "JSX." + JsxNames.IntrinsicElements);
                 }
-                var saveErrorInfo = errorInfo;
-                // Note that these checks are specifically ordered to produce correct results.
-                if (source.flags & 524288 /* Union */) {
-                    if (relation === comparableRelation) {
-                        result = someTypeRelatedToType(source, target, reportErrors && !(source.flags & 8190 /* Primitive */));
-                    }
-                    else {
-                        result = eachTypeRelatedToType(source, target, reportErrors && !(source.flags & 8190 /* Primitive */));
-                    }
-                    if (result) {
-                        return result;
-                    }
+                // If we need to report an error, we already done so here. So just return any to prevent any more error downstream
+                return anyType;
+            }
+            // Get the element instance type (the result of newing or invoking this tag)
+            var elemInstanceType = getJsxElementInstanceType(openingLikeElement, elementType);
+            // If we should include all stateless attributes type, then get all attributes type from all stateless function signature.
+            // Otherwise get only attributes type from the signature picked by choose-overload logic.
+            var statelessAttributesType = shouldIncludeAllStatelessAttributesType ?
+                tryGetAllJsxStatelessFunctionAttributesType(openingLikeElement, elementType, elemInstanceType, elementClassType) :
+                defaultTryGetJsxStatelessFunctionAttributesType(openingLikeElement, elementType, elemInstanceType, elementClassType);
+            if (statelessAttributesType) {
+                return statelessAttributesType;
+            }
+            // Issue an error if this return type isn't assignable to JSX.ElementClass
+            if (elementClassType) {
+                checkTypeRelatedTo(elemInstanceType, elementClassType, assignableRelation, openingLikeElement, ts.Diagnostics.JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements);
+            }
+            if (isTypeAny(elemInstanceType)) {
+                return elemInstanceType;
+            }
+            var propsName = getJsxElementPropertiesName();
+            if (propsName === undefined) {
+                // There is no type ElementAttributesProperty, return 'any'
+                return anyType;
+            }
+            else if (propsName === "") {
+                // If there is no e.g. 'props' member in ElementAttributesProperty, use the element class type instead
+                return elemInstanceType;
+            }
+            else {
+                var attributesType = getTypeOfPropertyOfType(elemInstanceType, propsName);
+                if (!attributesType) {
+                    // There is no property named 'props' on this instance type
+                    return emptyObjectType;
                 }
-                else if (target.flags & 1048576 /* Intersection */) {
-                    result = typeRelatedToEachType(source, target, reportErrors);
-                    if (result) {
-                        return result;
-                    }
+                else if (isTypeAny(attributesType) || (attributesType === unknownType)) {
+                    // Props is of type 'any' or unknown
+                    return attributesType;
                 }
                 else {
-                    // It is necessary to try these "some" checks on both sides because there may be nested "each" checks
-                    // on either side that need to be prioritized. For example, A | B = (A | B) & (C | D) or
-                    // A & B = (A & B) | (C & D).
-                    if (source.flags & 1048576 /* Intersection */) {
-                        // Check to see if any constituents of the intersection are immediately related to the target.
-                        //
-                        // Don't report errors though. Checking whether a constituent is related to the source is not actually
-                        // useful and leads to some confusing error messages. Instead it is better to let the below checks
-                        // take care of this, or to not elaborate at all. For instance,
-                        //
-                        //    - For an object type (such as 'C = A & B'), users are usually more interested in structural errors.
-                        //
-                        //    - For a union type (such as '(A | B) = (C & D)'), it's better to hold onto the whole intersection
-                        //          than to report that 'D' is not assignable to 'A' or 'B'.
-                        //
-                        //    - For a primitive type or type parameter (such as 'number = A & B') there is no point in
-                        //          breaking the intersection apart.
-                        if (result = someTypeRelatedToType(source, target, /*reportErrors*/ false)) {
-                            return result;
+                    // Normal case -- add in IntrinsicClassElements<T> and IntrinsicElements
+                    var apparentAttributesType = attributesType;
+                    var intrinsicClassAttribs = getJsxType(JsxNames.IntrinsicClassAttributes);
+                    if (intrinsicClassAttribs !== unknownType) {
+                        var typeParams = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(intrinsicClassAttribs.symbol);
+                        if (typeParams) {
+                            if (typeParams.length === 1) {
+                                apparentAttributesType = intersectTypes(createTypeReference(intrinsicClassAttribs, [elemInstanceType]), apparentAttributesType);
+                            }
                         }
-                    }
-                    if (target.flags & 524288 /* Union */) {
-                        if (result = typeRelatedToSomeType(source, target, reportErrors && !(source.flags & 8190 /* Primitive */) && !(target.flags & 8190 /* Primitive */))) {
-                            return result;
+                        else {
+                            apparentAttributesType = intersectTypes(attributesType, intrinsicClassAttribs);
                         }
                     }
-                }
-                if (source.flags & 16384 /* TypeParameter */) {
-                    var constraint = getConstraintOfTypeParameter(source);
-                    if (!constraint || constraint.flags & 1 /* Any */) {
-                        constraint = emptyObjectType;
-                    }
-                    // The constraint may need to be further instantiated with its 'this' type.
-                    constraint = getTypeWithThisArgument(constraint, source);
-                    // Report constraint errors only if the constraint is not the empty object type
-                    var reportConstraintErrors = reportErrors && constraint !== emptyObjectType;
-                    if (result = isRelatedTo(constraint, target, reportConstraintErrors)) {
-                        errorInfo = saveErrorInfo;
-                        return result;
+                    var intrinsicAttribs = getJsxType(JsxNames.IntrinsicAttributes);
+                    if (intrinsicAttribs !== unknownType) {
+                        apparentAttributesType = intersectTypes(intrinsicAttribs, apparentAttributesType);
                     }
+                    return apparentAttributesType;
+                }
+            }
+        }
+        /**
+         * Get attributes type of the given intrinsic opening-like Jsx element by resolving the tag name.
+         * The function is intended to be called from a function which has checked that the opening element is an intrinsic element.
+         * @param node an intrinsic JSX opening-like element
+         */
+        function getIntrinsicAttributesTypeFromJsxOpeningLikeElement(node) {
+            ts.Debug.assert(isJsxIntrinsicIdentifier(node.tagName));
+            var links = getNodeLinks(node);
+            if (!links.resolvedJsxElementAttributesType) {
+                var symbol = getIntrinsicTagSymbol(node);
+                if (links.jsxFlags & 1 /* IntrinsicNamedElement */) {
+                    return links.resolvedJsxElementAttributesType = getTypeOfSymbol(symbol);
+                }
+                else if (links.jsxFlags & 2 /* IntrinsicIndexedElement */) {
+                    return links.resolvedJsxElementAttributesType = getIndexInfoOfSymbol(symbol, 0 /* String */).type;
                 }
                 else {
-                    if (source.flags & 131072 /* Reference */ && target.flags & 131072 /* Reference */ && source.target === target.target) {
-                        // We have type references to same target type, see if relationship holds for all type arguments
-                        if (result = typeArgumentsRelatedTo(source, target, reportErrors)) {
-                            return result;
-                        }
-                    }
-                    // Even if relationship doesn't hold for unions, intersections, or generic type references,
-                    // it may hold in a structural comparison.
-                    var apparentSource = getApparentType(source);
-                    // In a check of the form X = A & B, we will have previously checked if A relates to X or B relates
-                    // to X. Failing both of those we want to check if the aggregation of A and B's members structurally
-                    // relates to X. Thus, we include intersection types on the source side here.
-                    if (apparentSource.flags & (2588672 /* ObjectType */ | 1048576 /* Intersection */) && target.flags & 2588672 /* ObjectType */) {
-                        // Report structural errors only if we haven't reported any errors yet
-                        var reportStructuralErrors = reportErrors && errorInfo === saveErrorInfo && !(source.flags & 8190 /* Primitive */);
-                        if (result = objectTypeRelatedTo(apparentSource, source, target, reportStructuralErrors)) {
-                            errorInfo = saveErrorInfo;
-                            return result;
-                        }
-                    }
+                    return links.resolvedJsxElementAttributesType = unknownType;
+                }
+            }
+            return links.resolvedJsxElementAttributesType;
+        }
+        /**
+         * Get attributes type of the given custom opening-like JSX element.
+         * This function is intended to be called from a caller that handles intrinsic JSX element already.
+         * @param node a custom JSX opening-like element
+         * @param shouldIncludeAllStatelessAttributesType a boolean value used by language service to get all possible attributes type from an overload stateless function component
+         */
+        function getCustomJsxElementAttributesType(node, shouldIncludeAllStatelessAttributesType) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedJsxElementAttributesType) {
+                var elemClassType = getJsxGlobalElementClassType();
+                return links.resolvedJsxElementAttributesType = resolveCustomJsxElementAttributesType(node, shouldIncludeAllStatelessAttributesType, /*elementType*/ undefined, elemClassType);
+            }
+            return links.resolvedJsxElementAttributesType;
+        }
+        /**
+         * Get all possible attributes type, especially from an overload stateless function component, of the given JSX opening-like element.
+         * This function is called by language service (see: completions-tryGetGlobalSymbols).
+         * @param node a JSX opening-like element to get attributes type for
+         */
+        function getAllAttributesTypeFromJsxOpeningLikeElement(node) {
+            if (isJsxIntrinsicIdentifier(node.tagName)) {
+                return getIntrinsicAttributesTypeFromJsxOpeningLikeElement(node);
+            }
+            else {
+                // Because in language service, the given JSX opening-like element may be incomplete and therefore,
+                // we can't resolve to exact signature if the element is a stateless function component so the best thing to do is return all attributes type from all overloads.
+                return getCustomJsxElementAttributesType(node, /*shouldIncludeAllStatelessAttributesType*/ true);
+            }
+        }
+        /**
+         * Get the attributes type, which indicates the attributes that are valid on the given JSXOpeningLikeElement.
+         * @param node a JSXOpeningLikeElement node
+         * @return an attributes type of the given node
+         */
+        function getAttributesTypeFromJsxOpeningLikeElement(node) {
+            if (isJsxIntrinsicIdentifier(node.tagName)) {
+                return getIntrinsicAttributesTypeFromJsxOpeningLikeElement(node);
+            }
+            else {
+                return getCustomJsxElementAttributesType(node, /*shouldIncludeAllStatelessAttributesType*/ false);
+            }
+        }
+        /**
+         * Given a JSX attribute, returns the symbol for the corresponds property
+         * of the element attributes type. Will return unknownSymbol for attributes
+         * that have no matching element attributes type property.
+         */
+        function getJsxAttributePropertySymbol(attrib) {
+            var attributesType = getAttributesTypeFromJsxOpeningLikeElement(attrib.parent.parent);
+            var prop = getPropertyOfType(attributesType, attrib.name.text);
+            return prop || unknownSymbol;
+        }
+        function getJsxGlobalElementClassType() {
+            if (!deferredJsxElementClassType) {
+                deferredJsxElementClassType = getExportedTypeFromNamespace(JsxNames.JSX, JsxNames.ElementClass);
+            }
+            return deferredJsxElementClassType;
+        }
+        function getJsxGlobalElementType() {
+            if (!deferredJsxElementType) {
+                deferredJsxElementType = getExportedTypeFromNamespace(JsxNames.JSX, JsxNames.Element);
+            }
+            return deferredJsxElementType;
+        }
+        function getJsxGlobalStatelessElementType() {
+            if (!deferredJsxStatelessElementType) {
+                var jsxElementType = getJsxGlobalElementType();
+                if (jsxElementType) {
+                    deferredJsxStatelessElementType = getUnionType([jsxElementType, nullType]);
                 }
-                if (reportErrors) {
-                    if (source.flags & 2588672 /* ObjectType */ && target.flags & 8190 /* Primitive */) {
-                        tryElaborateErrorsForPrimitivesAndObjects(source, target);
-                    }
-                    else if (source.symbol && source.flags & 2588672 /* ObjectType */ && globalObjectType === source) {
-                        reportError(ts.Diagnostics.The_Object_type_is_assignable_to_very_few_other_types_Did_you_mean_to_use_the_any_type_instead);
-                    }
-                    reportRelationError(headMessage, source, target);
+            }
+            return deferredJsxStatelessElementType;
+        }
+        /**
+         * Returns all the properties of the Jsx.IntrinsicElements interface
+         */
+        function getJsxIntrinsicTagNames() {
+            var intrinsics = getJsxType(JsxNames.IntrinsicElements);
+            return intrinsics ? getPropertiesOfType(intrinsics) : emptyArray;
+        }
+        function checkJsxPreconditions(errorNode) {
+            // Preconditions for using JSX
+            if ((compilerOptions.jsx || 0 /* None */) === 0 /* None */) {
+                error(errorNode, ts.Diagnostics.Cannot_use_JSX_unless_the_jsx_flag_is_provided);
+            }
+            if (getJsxGlobalElementType() === undefined) {
+                if (noImplicitAny) {
+                    error(errorNode, ts.Diagnostics.JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist);
                 }
-                return 0 /* False */;
             }
-            function isIdenticalTo(source, target) {
-                var result;
-                if (source.flags & 2588672 /* ObjectType */ && target.flags & 2588672 /* ObjectType */) {
-                    if (source.flags & 131072 /* Reference */ && target.flags & 131072 /* Reference */ && source.target === target.target) {
-                        // We have type references to same target type, see if all type arguments are identical
-                        if (result = typeArgumentsRelatedTo(source, target, /*reportErrors*/ false)) {
-                            return result;
-                        }
-                    }
-                    return objectTypeRelatedTo(source, source, target, /*reportErrors*/ false);
+        }
+        function checkJsxOpeningLikeElement(node) {
+            checkGrammarJsxElement(node);
+            checkJsxPreconditions(node);
+            // The reactNamespace/jsxFactory's root symbol should be marked as 'used' so we don't incorrectly elide its import.
+            // And if there is no reactNamespace/jsxFactory's symbol in scope when targeting React emit, we should issue an error.
+            var reactRefErr = diagnostics && compilerOptions.jsx === 2 /* React */ ? ts.Diagnostics.Cannot_find_name_0 : undefined;
+            var reactNamespace = getJsxNamespace();
+            var reactSym = resolveName(node.tagName, reactNamespace, 107455 /* Value */, reactRefErr, reactNamespace);
+            if (reactSym) {
+                // Mark local symbol as referenced here because it might not have been marked
+                // if jsx emit was not react as there wont be error being emitted
+                reactSym.isReferenced = true;
+                // If react symbol is alias, mark it as refereced
+                if (reactSym.flags & 8388608 /* Alias */ && !isConstEnumOrConstEnumOnlyModule(resolveAlias(reactSym))) {
+                    markAliasSymbolAsReferenced(reactSym);
                 }
-                if (source.flags & 524288 /* Union */ && target.flags & 524288 /* Union */ ||
-                    source.flags & 1048576 /* Intersection */ && target.flags & 1048576 /* Intersection */) {
-                    if (result = eachTypeRelatedToSomeType(source, target, /*reportErrors*/ false)) {
-                        if (result &= eachTypeRelatedToSomeType(target, source, /*reportErrors*/ false)) {
-                            return result;
-                        }
-                    }
+            }
+            checkJsxAttributesAssignableToTagNameAttributes(node);
+        }
+        /**
+         * Check if a property with the given name is known anywhere in the given type. In an object type, a property
+         * is considered known if
+         * 1. the object type is empty and the check is for assignability, or
+         * 2. if the object type has index signatures, or
+         * 3. if the property is actually declared in the object type
+         *    (this means that 'toString', for example, is not usually a known property).
+         * 4. In a union or intersection type,
+         *    a property is considered known if it is known in any constituent type.
+         * @param targetType a type to search a given name in
+         * @param name a property name to search
+         * @param isComparingJsxAttributes a boolean flag indicating whether we are searching in JsxAttributesType
+         */
+        function isKnownProperty(targetType, name, isComparingJsxAttributes) {
+            if (targetType.flags & 32768 /* Object */) {
+                var resolved = resolveStructuredTypeMembers(targetType);
+                if (resolved.stringIndexInfo ||
+                    resolved.numberIndexInfo && isNumericLiteralName(name) ||
+                    getPropertyOfObjectType(targetType, name) ||
+                    isComparingJsxAttributes && !isUnhyphenatedJsxName(name)) {
+                    // For JSXAttributes, if the attribute has a hyphenated name, consider that the attribute to be known.
+                    return true;
                 }
-                return 0 /* False */;
             }
-            // Check if a property with the given name is known anywhere in the given type. In an object type, a property
-            // is considered known if the object type is empty and the check is for assignability, if the object type has
-            // index signatures, or if the property is actually declared in the object type. In a union or intersection
-            // type, a property is considered known if it is known in any constituent type.
-            function isKnownProperty(type, name) {
-                if (type.flags & 2588672 /* ObjectType */) {
-                    var resolved = resolveStructuredTypeMembers(type);
-                    if ((relation === assignableRelation || relation === comparableRelation) && (type === globalObjectType || isEmptyObjectType(resolved)) ||
-                        resolved.stringIndexInfo ||
-                        (resolved.numberIndexInfo && isNumericLiteralName(name)) ||
-                        getPropertyOfType(type, name)) {
+            else if (targetType.flags & 196608 /* UnionOrIntersection */) {
+                for (var _i = 0, _a = targetType.types; _i < _a.length; _i++) {
+                    var t = _a[_i];
+                    if (isKnownProperty(t, name, isComparingJsxAttributes)) {
                         return true;
                     }
                 }
-                else if (type.flags & 1572864 /* UnionOrIntersection */) {
-                    for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                        var t = _a[_i];
-                        if (isKnownProperty(t, name)) {
-                            return true;
-                        }
-                    }
-                }
-                return false;
             }
-            function isEmptyObjectType(t) {
-                return t.properties.length === 0 &&
-                    t.callSignatures.length === 0 &&
-                    t.constructSignatures.length === 0 &&
-                    !t.stringIndexInfo &&
-                    !t.numberIndexInfo;
+            return false;
+        }
+        /**
+         * Check whether the given attributes of JSX opening-like element is assignable to the tagName attributes.
+         *      Get the attributes type of the opening-like element through resolving the tagName, "target attributes"
+         *      Check assignablity between given attributes property, "source attributes", and the "target attributes"
+         * @param openingLikeElement an opening-like JSX element to check its JSXAttributes
+         */
+        function checkJsxAttributesAssignableToTagNameAttributes(openingLikeElement) {
+            // The function involves following steps:
+            //      1. Figure out expected attributes type by resolving tagName of the JSX opening-like element, targetAttributesType.
+            //         During these steps, we will try to resolve the tagName as intrinsic name, stateless function, stateful component (in the order)
+            //      2. Solved JSX attributes type given by users, sourceAttributesType, which is by resolving "attributes" property of the JSX opening-like element.
+            //      3. Check if the two are assignable to each other
+            // targetAttributesType is a type of an attributes from resolving tagName of an opening-like JSX element.
+            var targetAttributesType = isJsxIntrinsicIdentifier(openingLikeElement.tagName) ?
+                getIntrinsicAttributesTypeFromJsxOpeningLikeElement(openingLikeElement) :
+                getCustomJsxElementAttributesType(openingLikeElement, /*shouldIncludeAllStatelessAttributesType*/ false);
+            // sourceAttributesType is a type of an attributes properties.
+            // i.e <div attr1={10} attr2="string" />
+            //     attr1 and attr2 are treated as JSXAttributes attached in the JsxOpeningLikeElement as "attributes".
+            var sourceAttributesType = createJsxAttributesTypeFromAttributesProperty(openingLikeElement, function (attribute) {
+                return isUnhyphenatedJsxName(attribute.name) || !!(getPropertyOfType(targetAttributesType, attribute.name));
+            });
+            // If the targetAttributesType is an emptyObjectType, indicating that there is no property named 'props' on this instance type.
+            // but there exists a sourceAttributesType, we need to explicitly give an error as normal assignability check allow excess properties and will pass.
+            if (targetAttributesType === emptyObjectType && (isTypeAny(sourceAttributesType) || sourceAttributesType.properties.length > 0)) {
+                error(openingLikeElement, ts.Diagnostics.JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property, getJsxElementPropertiesName());
             }
-            function hasExcessProperties(source, target, reportErrors) {
-                if (!(target.flags & 536870912 /* ObjectLiteralPatternWithComputedProperties */) && maybeTypeOfKind(target, 2588672 /* ObjectType */)) {
-                    for (var _i = 0, _a = getPropertiesOfObjectType(source); _i < _a.length; _i++) {
-                        var prop = _a[_i];
-                        if (!isKnownProperty(target, prop.name)) {
-                            if (reportErrors) {
-                                // We know *exactly* where things went wrong when comparing the types.
-                                // Use this property as the error node as this will be more helpful in
-                                // reasoning about what went wrong.
-                                ts.Debug.assert(!!errorNode);
-                                errorNode = prop.valueDeclaration;
-                                reportError(ts.Diagnostics.Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1, symbolToString(prop), typeToString(target));
-                            }
-                            return true;
+            else {
+                // Check if sourceAttributesType assignable to targetAttributesType though this check will allow excess properties
+                var isSourceAttributeTypeAssignableToTarget = checkTypeAssignableTo(sourceAttributesType, targetAttributesType, openingLikeElement.attributes.properties.length > 0 ? openingLikeElement.attributes : openingLikeElement);
+                // After we check for assignability, we will do another pass to check that all explicitly specified attributes have correct name corresponding in targetAttributeType.
+                // This will allow excess properties in spread type as it is very common pattern to spread outter attributes into React component in its render method.
+                if (isSourceAttributeTypeAssignableToTarget && !isTypeAny(sourceAttributesType) && !isTypeAny(targetAttributesType)) {
+                    for (var _i = 0, _a = openingLikeElement.attributes.properties; _i < _a.length; _i++) {
+                        var attribute = _a[_i];
+                        if (ts.isJsxAttribute(attribute) && !isKnownProperty(targetAttributesType, attribute.name.text, /*isComparingJsxAttributes*/ true)) {
+                            error(attribute, ts.Diagnostics.Property_0_does_not_exist_on_type_1, attribute.name.text, typeToString(targetAttributesType));
+                            // We break here so that errors won't be cascading
+                            break;
                         }
                     }
                 }
-                return false;
             }
-            function eachTypeRelatedToSomeType(source, target, reportErrors) {
-                var result = -1 /* True */;
-                var sourceTypes = source.types;
-                for (var _i = 0, sourceTypes_1 = sourceTypes; _i < sourceTypes_1.length; _i++) {
-                    var sourceType = sourceTypes_1[_i];
-                    var related = typeRelatedToSomeType(sourceType, target, /*reportErrors*/ false);
-                    if (!related) {
-                        return 0 /* False */;
-                    }
-                    result &= related;
+        }
+        function checkJsxExpression(node, checkMode) {
+            if (node.expression) {
+                var type = checkExpression(node.expression, checkMode);
+                if (node.dotDotDotToken && type !== anyType && !isArrayType(type)) {
+                    error(node, ts.Diagnostics.JSX_spread_child_must_be_an_array_type, node.toString(), typeToString(type));
                 }
-                return result;
+                return type;
             }
-            function typeRelatedToSomeType(source, target, reportErrors) {
-                var targetTypes = target.types;
-                if (target.flags & 524288 /* Union */ && containsType(targetTypes, source)) {
-                    return -1 /* True */;
-                }
-                var len = targetTypes.length;
-                for (var i = 0; i < len; i++) {
-                    var related = isRelatedTo(source, targetTypes[i], reportErrors && i === len - 1);
-                    if (related) {
-                        return related;
+            else {
+                return unknownType;
+            }
+        }
+        // If a symbol is a synthesized symbol with no value declaration, we assume it is a property. Example of this are the synthesized
+        // '.prototype' property as well as synthesized tuple index properties.
+        function getDeclarationKindFromSymbol(s) {
+            return s.valueDeclaration ? s.valueDeclaration.kind : 149 /* PropertyDeclaration */;
+        }
+        function getDeclarationNodeFlagsFromSymbol(s) {
+            return s.valueDeclaration ? ts.getCombinedNodeFlags(s.valueDeclaration) : 0;
+        }
+        function isMethodLike(symbol) {
+            return !!(symbol.flags & 8192 /* Method */ || ts.getCheckFlags(symbol) & 4 /* SyntheticMethod */);
+        }
+        /**
+         * Check whether the requested property access is valid.
+         * Returns true if node is a valid property access, and false otherwise.
+         * @param node The node to be checked.
+         * @param left The left hand side of the property access (e.g.: the super in `super.foo`).
+         * @param type The type of left.
+         * @param prop The symbol for the right hand side of the property access.
+         */
+        function checkPropertyAccessibility(node, left, type, prop) {
+            var flags = ts.getDeclarationModifierFlagsFromSymbol(prop);
+            var errorNode = node.kind === 179 /* PropertyAccessExpression */ || node.kind === 226 /* VariableDeclaration */ ?
+                node.name :
+                node.right;
+            if (ts.getCheckFlags(prop) & 256 /* ContainsPrivate */) {
+                // Synthetic property with private constituent property
+                error(errorNode, ts.Diagnostics.Property_0_has_conflicting_declarations_and_is_inaccessible_in_type_1, symbolToString(prop), typeToString(type));
+                return false;
+            }
+            if (left.kind === 97 /* SuperKeyword */) {
+                // TS 1.0 spec (April 2014): 4.8.2
+                // - In a constructor, instance member function, instance member accessor, or
+                //   instance member variable initializer where this references a derived class instance,
+                //   a super property access is permitted and must specify a public instance member function of the base class.
+                // - In a static member function or static member accessor
+                //   where this references the constructor function object of a derived class,
+                //   a super property access is permitted and must specify a public static member function of the base class.
+                if (languageVersion < 2 /* ES2015 */) {
+                    var hasNonMethodDeclaration = forEachProperty(prop, function (p) {
+                        var propKind = getDeclarationKindFromSymbol(p);
+                        return propKind !== 151 /* MethodDeclaration */ && propKind !== 150 /* MethodSignature */;
+                    });
+                    if (hasNonMethodDeclaration) {
+                        error(errorNode, ts.Diagnostics.Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword);
+                        return false;
                     }
                 }
-                return 0 /* False */;
+                if (flags & 128 /* Abstract */) {
+                    // A method cannot be accessed in a super property access if the method is abstract.
+                    // This error could mask a private property access error. But, a member
+                    // cannot simultaneously be private and abstract, so this will trigger an
+                    // additional error elsewhere.
+                    error(errorNode, ts.Diagnostics.Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression, symbolToString(prop), typeToString(getDeclaringClass(prop)));
+                    return false;
+                }
             }
-            function typeRelatedToEachType(source, target, reportErrors) {
-                var result = -1 /* True */;
-                var targetTypes = target.types;
-                for (var _i = 0, targetTypes_1 = targetTypes; _i < targetTypes_1.length; _i++) {
-                    var targetType = targetTypes_1[_i];
-                    var related = isRelatedTo(source, targetType, reportErrors);
-                    if (!related) {
-                        return 0 /* False */;
-                    }
-                    result &= related;
+            // Public properties are otherwise accessible.
+            if (!(flags & 24 /* NonPublicAccessibilityModifier */)) {
+                return true;
+            }
+            // Property is known to be private or protected at this point
+            // Private property is accessible if the property is within the declaring class
+            if (flags & 8 /* Private */) {
+                var declaringClassDeclaration = getClassLikeDeclarationOfSymbol(getParentOfSymbol(prop));
+                if (!isNodeWithinClass(node, declaringClassDeclaration)) {
+                    error(errorNode, ts.Diagnostics.Property_0_is_private_and_only_accessible_within_class_1, symbolToString(prop), typeToString(getDeclaringClass(prop)));
+                    return false;
                 }
-                return result;
+                return true;
             }
-            function someTypeRelatedToType(source, target, reportErrors) {
-                var sourceTypes = source.types;
-                if (source.flags & 524288 /* Union */ && containsType(sourceTypes, target)) {
-                    return -1 /* True */;
+            // Property is known to be protected at this point
+            // All protected properties of a supertype are accessible in a super access
+            if (left.kind === 97 /* SuperKeyword */) {
+                return true;
+            }
+            // Find the first enclosing class that has the declaring classes of the protected constituents
+            // of the property as base classes
+            var enclosingClass = forEachEnclosingClass(node, function (enclosingDeclaration) {
+                var enclosingClass = getDeclaredTypeOfSymbol(getSymbolOfNode(enclosingDeclaration));
+                return isClassDerivedFromDeclaringClasses(enclosingClass, prop) ? enclosingClass : undefined;
+            });
+            // A protected property is accessible if the property is within the declaring class or classes derived from it
+            if (!enclosingClass) {
+                error(errorNode, ts.Diagnostics.Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses, symbolToString(prop), typeToString(getDeclaringClass(prop) || type));
+                return false;
+            }
+            // No further restrictions for static properties
+            if (flags & 32 /* Static */) {
+                return true;
+            }
+            // An instance property must be accessed through an instance of the enclosing class
+            if (type.flags & 16384 /* TypeParameter */ && type.isThisType) {
+                // get the original type -- represented as the type constraint of the 'this' type
+                type = getConstraintOfTypeParameter(type);
+            }
+            if (!(getObjectFlags(getTargetType(type)) & 3 /* ClassOrInterface */ && hasBaseType(type, enclosingClass))) {
+                error(errorNode, ts.Diagnostics.Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1, symbolToString(prop), typeToString(enclosingClass));
+                return false;
+            }
+            return true;
+        }
+        function checkNonNullExpression(node) {
+            return checkNonNullType(checkExpression(node), node);
+        }
+        function checkNonNullType(type, errorNode) {
+            var kind = (strictNullChecks ? getFalsyFlags(type) : type.flags) & 6144 /* Nullable */;
+            if (kind) {
+                error(errorNode, kind & 2048 /* Undefined */ ? kind & 4096 /* Null */ ?
+                    ts.Diagnostics.Object_is_possibly_null_or_undefined :
+                    ts.Diagnostics.Object_is_possibly_undefined :
+                    ts.Diagnostics.Object_is_possibly_null);
+                var t = getNonNullableType(type);
+                return t.flags & (6144 /* Nullable */ | 8192 /* Never */) ? unknownType : t;
+            }
+            return type;
+        }
+        function checkPropertyAccessExpression(node) {
+            return checkPropertyAccessExpressionOrQualifiedName(node, node.expression, node.name);
+        }
+        function checkQualifiedName(node) {
+            return checkPropertyAccessExpressionOrQualifiedName(node, node.left, node.right);
+        }
+        function checkPropertyAccessExpressionOrQualifiedName(node, left, right) {
+            var type = checkNonNullExpression(left);
+            if (isTypeAny(type) || type === silentNeverType) {
+                return type;
+            }
+            var apparentType = getApparentType(getWidenedType(type));
+            if (apparentType === unknownType || (type.flags & 16384 /* TypeParameter */ && isTypeAny(apparentType))) {
+                // handle cases when type is Type parameter with invalid or any constraint
+                return apparentType;
+            }
+            var prop = getPropertyOfType(apparentType, right.text);
+            if (!prop) {
+                var stringIndexType = getIndexTypeOfType(apparentType, 0 /* String */);
+                if (stringIndexType) {
+                    return stringIndexType;
                 }
-                var len = sourceTypes.length;
-                for (var i = 0; i < len; i++) {
-                    var related = isRelatedTo(sourceTypes[i], target, reportErrors && i === len - 1);
-                    if (related) {
-                        return related;
-                    }
+                if (right.text && !checkAndReportErrorForExtendingInterface(node)) {
+                    reportNonexistentProperty(right, type.flags & 16384 /* TypeParameter */ && type.isThisType ? apparentType : type);
                 }
-                return 0 /* False */;
+                return unknownType;
             }
-            function eachTypeRelatedToType(source, target, reportErrors) {
-                var result = -1 /* True */;
-                var sourceTypes = source.types;
-                for (var _i = 0, sourceTypes_2 = sourceTypes; _i < sourceTypes_2.length; _i++) {
-                    var sourceType = sourceTypes_2[_i];
-                    var related = isRelatedTo(sourceType, target, reportErrors);
-                    if (!related) {
-                        return 0 /* False */;
-                    }
-                    result &= related;
+            if (prop.valueDeclaration) {
+                if (isInPropertyInitializer(node) &&
+                    !isBlockScopedNameDeclaredBeforeUse(prop.valueDeclaration, right)) {
+                    error(right, ts.Diagnostics.Block_scoped_variable_0_used_before_its_declaration, right.text);
+                }
+                if (prop.valueDeclaration.kind === 229 /* ClassDeclaration */ &&
+                    node.parent && node.parent.kind !== 159 /* TypeReference */ &&
+                    !ts.isInAmbientContext(prop.valueDeclaration) &&
+                    !isBlockScopedNameDeclaredBeforeUse(prop.valueDeclaration, right)) {
+                    error(right, ts.Diagnostics.Class_0_used_before_its_declaration, right.text);
                 }
-                return result;
             }
-            function typeArgumentsRelatedTo(source, target, reportErrors) {
-                var sources = source.typeArguments || emptyArray;
-                var targets = target.typeArguments || emptyArray;
-                if (sources.length !== targets.length && relation === identityRelation) {
-                    return 0 /* False */;
+            markPropertyAsReferenced(prop);
+            getNodeLinks(node).resolvedSymbol = prop;
+            checkPropertyAccessibility(node, left, apparentType, prop);
+            var propType = getDeclaredOrApparentType(prop, node);
+            var assignmentKind = ts.getAssignmentTargetKind(node);
+            if (assignmentKind) {
+                if (isReferenceToReadonlyEntity(node, prop) || isReferenceThroughNamespaceImport(node)) {
+                    error(right, ts.Diagnostics.Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property, right.text);
+                    return unknownType;
                 }
-                var length = sources.length <= targets.length ? sources.length : targets.length;
-                var result = -1 /* True */;
-                for (var i = 0; i < length; i++) {
-                    var related = isRelatedTo(sources[i], targets[i], reportErrors);
-                    if (!related) {
-                        return 0 /* False */;
+            }
+            // Only compute control flow type if this is a property access expression that isn't an
+            // assignment target, and the referenced property was declared as a variable, property,
+            // accessor, or optional method.
+            if (node.kind !== 179 /* PropertyAccessExpression */ || assignmentKind === 1 /* Definite */ ||
+                !(prop.flags & (3 /* Variable */ | 4 /* Property */ | 98304 /* Accessor */)) &&
+                    !(prop.flags & 8192 /* Method */ && propType.flags & 65536 /* Union */)) {
+                return propType;
+            }
+            var flowType = getFlowTypeOfReference(node, propType);
+            return assignmentKind ? getBaseTypeOfLiteralType(flowType) : flowType;
+        }
+        function reportNonexistentProperty(propNode, containingType) {
+            var errorInfo;
+            if (containingType.flags & 65536 /* Union */ && !(containingType.flags & 8190 /* Primitive */)) {
+                for (var _i = 0, _a = containingType.types; _i < _a.length; _i++) {
+                    var subtype = _a[_i];
+                    if (!getPropertyOfType(subtype, propNode.text)) {
+                        errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.Property_0_does_not_exist_on_type_1, ts.declarationNameToString(propNode), typeToString(subtype));
+                        break;
                     }
-                    result &= related;
                 }
-                return result;
             }
-            // Determine if two object types are related by structure. First, check if the result is already available in the global cache.
-            // Second, check if we have already started a comparison of the given two types in which case we assume the result to be true.
-            // Third, check if both types are part of deeply nested chains of generic type instantiations and if so assume the types are
-            // equal and infinitely expanding. Fourth, if we have reached a depth of 100 nested comparisons, assume we have runaway recursion
-            // and issue an error. Otherwise, actually compare the structure of the two types.
-            function objectTypeRelatedTo(source, originalSource, target, reportErrors) {
-                if (overflow) {
-                    return 0 /* False */;
+            var suggestion = getSuggestionForNonexistentProperty(propNode, containingType);
+            if (suggestion) {
+                errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.Property_0_does_not_exist_on_type_1_Did_you_mean_2, ts.declarationNameToString(propNode), typeToString(containingType), suggestion);
+            }
+            else {
+                errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.Property_0_does_not_exist_on_type_1, ts.declarationNameToString(propNode), typeToString(containingType));
+            }
+            diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(propNode, errorInfo));
+        }
+        function getSuggestionForNonexistentProperty(node, containingType) {
+            var suggestion = getSpellingSuggestionForName(node.text, getPropertiesOfObjectType(containingType), 107455 /* Value */);
+            return suggestion && suggestion.name;
+        }
+        function getSuggestionForNonexistentSymbol(location, name, meaning) {
+            var result = resolveNameHelper(location, name, meaning, /*nameNotFoundMessage*/ undefined, name, function (symbols, name, meaning) {
+                var symbol = getSymbol(symbols, name, meaning);
+                if (symbol) {
+                    // Sometimes the symbol is found when location is a return type of a function: `typeof x` and `x` is declared in the body of the function
+                    // So the table *contains* `x` but `x` isn't actually in scope.
+                    // However, resolveNameHelper will continue and call this callback again, so we'll eventually get a correct suggestion.
+                    return symbol;
                 }
-                var id = relation !== identityRelation || source.id < target.id ? source.id + "," + target.id : target.id + "," + source.id;
-                var related = relation[id];
-                if (related !== undefined) {
-                    if (reportErrors && related === 2 /* Failed */) {
-                        // We are elaborating errors and the cached result is an unreported failure. Record the result as a reported
-                        // failure and continue computing the relation such that errors get reported.
-                        relation[id] = 3 /* FailedAndReported */;
+                return getSpellingSuggestionForName(name, ts.arrayFrom(symbols.values()), meaning);
+            });
+            if (result) {
+                return result.name;
+            }
+        }
+        /**
+         * Given a name and a list of symbols whose names are *not* equal to the name, return a spelling suggestion if there is one that is close enough.
+         * Names less than length 3 only check for case-insensitive equality, not levenshtein distance.
+         *
+         * If there is a candidate that's the same except for case, return that.
+         * If there is a candidate that's within one edit of the name, return that.
+         * Otherwise, return the candidate with the smallest Levenshtein distance,
+         *    except for candidates:
+         *      * With no name
+         *      * Whose meaning doesn't match the `meaning` parameter.
+         *      * Whose length differs from the target name by more than 0.3 of the length of the name.
+         *      * Whose levenshtein distance is more than 0.4 of the length of the name
+         *        (0.4 allows 1 substitution/transposition for every 5 characters,
+         *         and 1 insertion/deletion at 3 characters)
+         * Names longer than 30 characters don't get suggestions because Levenshtein distance is an n**2 algorithm.
+         */
+        function getSpellingSuggestionForName(name, symbols, meaning) {
+            var worstDistance = name.length * 0.4;
+            var maximumLengthDifference = Math.min(3, name.length * 0.34);
+            var bestDistance = Number.MAX_VALUE;
+            var bestCandidate = undefined;
+            var justCheckExactMatches = false;
+            if (name.length > 30) {
+                return undefined;
+            }
+            name = name.toLowerCase();
+            for (var _i = 0, symbols_3 = symbols; _i < symbols_3.length; _i++) {
+                var candidate = symbols_3[_i];
+                if (candidate.flags & meaning &&
+                    candidate.name &&
+                    Math.abs(candidate.name.length - name.length) < maximumLengthDifference) {
+                    var candidateName = candidate.name.toLowerCase();
+                    if (candidateName === name) {
+                        return candidate;
                     }
-                    else {
-                        return related === 1 /* Succeeded */ ? -1 /* True */ : 0 /* False */;
+                    if (justCheckExactMatches) {
+                        continue;
                     }
-                }
-                if (depth > 0) {
-                    for (var i = 0; i < depth; i++) {
-                        // If source and target are already being compared, consider them related with assumptions
-                        if (maybeStack[i][id]) {
-                            return 1 /* Maybe */;
-                        }
+                    if (candidateName.length < 3 ||
+                        name.length < 3 ||
+                        candidateName === "eval" ||
+                        candidateName === "intl" ||
+                        candidateName === "undefined" ||
+                        candidateName === "map" ||
+                        candidateName === "nan" ||
+                        candidateName === "set") {
+                        continue;
                     }
-                    if (depth === 100) {
-                        overflow = true;
-                        return 0 /* False */;
+                    var distance = ts.levenshtein(name, candidateName);
+                    if (distance > worstDistance) {
+                        continue;
                     }
-                }
-                else {
-                    sourceStack = [];
-                    targetStack = [];
-                    maybeStack = [];
-                    expandingFlags = 0;
-                }
-                sourceStack[depth] = source;
-                targetStack[depth] = target;
-                maybeStack[depth] = ts.createMap();
-                maybeStack[depth][id] = 1 /* Succeeded */;
-                depth++;
-                var saveExpandingFlags = expandingFlags;
-                if (!(expandingFlags & 1) && isDeeplyNestedGeneric(source, sourceStack, depth))
-                    expandingFlags |= 1;
-                if (!(expandingFlags & 2) && isDeeplyNestedGeneric(target, targetStack, depth))
-                    expandingFlags |= 2;
-                var result;
-                if (expandingFlags === 3) {
-                    result = 1 /* Maybe */;
-                }
-                else {
-                    result = propertiesRelatedTo(source, target, reportErrors);
-                    if (result) {
-                        result &= signaturesRelatedTo(source, target, 0 /* Call */, reportErrors);
-                        if (result) {
-                            result &= signaturesRelatedTo(source, target, 1 /* Construct */, reportErrors);
-                            if (result) {
-                                result &= indexTypesRelatedTo(source, originalSource, target, 0 /* String */, reportErrors);
-                                if (result) {
-                                    result &= indexTypesRelatedTo(source, originalSource, target, 1 /* Number */, reportErrors);
-                                }
-                            }
-                        }
+                    if (distance < 3) {
+                        justCheckExactMatches = true;
+                        bestCandidate = candidate;
                     }
-                }
-                expandingFlags = saveExpandingFlags;
-                depth--;
-                if (result) {
-                    var maybeCache = maybeStack[depth];
-                    // If result is definitely true, copy assumptions to global cache, else copy to next level up
-                    var destinationCache = (result === -1 /* True */ || depth === 0) ? relation : maybeStack[depth - 1];
-                    ts.copyProperties(maybeCache, destinationCache);
-                }
-                else {
-                    // A false result goes straight into global cache (when something is false under assumptions it
-                    // will also be false without assumptions)
-                    relation[id] = reportErrors ? 3 /* FailedAndReported */ : 2 /* Failed */;
-                }
-                return result;
-            }
-            function propertiesRelatedTo(source, target, reportErrors) {
-                if (relation === identityRelation) {
-                    return propertiesIdenticalTo(source, target);
-                }
-                var result = -1 /* True */;
-                var properties = getPropertiesOfObjectType(target);
-                var requireOptionalProperties = relation === subtypeRelation && !(source.flags & 8388608 /* ObjectLiteral */);
-                for (var _i = 0, properties_2 = properties; _i < properties_2.length; _i++) {
-                    var targetProp = properties_2[_i];
-                    var sourceProp = getPropertyOfType(source, targetProp.name);
-                    if (sourceProp !== targetProp) {
-                        if (!sourceProp) {
-                            if (!(targetProp.flags & 536870912 /* Optional */) || requireOptionalProperties) {
-                                if (reportErrors) {
-                                    reportError(ts.Diagnostics.Property_0_is_missing_in_type_1, symbolToString(targetProp), typeToString(source));
-                                }
-                                return 0 /* False */;
-                            }
-                        }
-                        else if (!(targetProp.flags & 134217728 /* Prototype */)) {
-                            var sourcePropFlags = getDeclarationModifierFlagsFromSymbol(sourceProp);
-                            var targetPropFlags = getDeclarationModifierFlagsFromSymbol(targetProp);
-                            if (sourcePropFlags & 8 /* Private */ || targetPropFlags & 8 /* Private */) {
-                                if (sourceProp.valueDeclaration !== targetProp.valueDeclaration) {
-                                    if (reportErrors) {
-                                        if (sourcePropFlags & 8 /* Private */ && targetPropFlags & 8 /* Private */) {
-                                            reportError(ts.Diagnostics.Types_have_separate_declarations_of_a_private_property_0, symbolToString(targetProp));
-                                        }
-                                        else {
-                                            reportError(ts.Diagnostics.Property_0_is_private_in_type_1_but_not_in_type_2, symbolToString(targetProp), typeToString(sourcePropFlags & 8 /* Private */ ? source : target), typeToString(sourcePropFlags & 8 /* Private */ ? target : source));
-                                        }
-                                    }
-                                    return 0 /* False */;
-                                }
-                            }
-                            else if (targetPropFlags & 16 /* Protected */) {
-                                var sourceDeclaredInClass = sourceProp.parent && sourceProp.parent.flags & 32 /* Class */;
-                                var sourceClass = sourceDeclaredInClass ? getDeclaredTypeOfSymbol(getParentOfSymbol(sourceProp)) : undefined;
-                                var targetClass = getDeclaredTypeOfSymbol(getParentOfSymbol(targetProp));
-                                if (!sourceClass || !hasBaseType(sourceClass, targetClass)) {
-                                    if (reportErrors) {
-                                        reportError(ts.Diagnostics.Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2, symbolToString(targetProp), typeToString(sourceClass || source), typeToString(targetClass));
-                                    }
-                                    return 0 /* False */;
-                                }
-                            }
-                            else if (sourcePropFlags & 16 /* Protected */) {
-                                if (reportErrors) {
-                                    reportError(ts.Diagnostics.Property_0_is_protected_in_type_1_but_public_in_type_2, symbolToString(targetProp), typeToString(source), typeToString(target));
-                                }
-                                return 0 /* False */;
-                            }
-                            var related = isRelatedTo(getTypeOfSymbol(sourceProp), getTypeOfSymbol(targetProp), reportErrors);
-                            if (!related) {
-                                if (reportErrors) {
-                                    reportError(ts.Diagnostics.Types_of_property_0_are_incompatible, symbolToString(targetProp));
-                                }
-                                return 0 /* False */;
-                            }
-                            result &= related;
-                            if (sourceProp.flags & 536870912 /* Optional */ && !(targetProp.flags & 536870912 /* Optional */)) {
-                                // TypeScript 1.0 spec (April 2014): 3.8.3
-                                // S is a subtype of a type T, and T is a supertype of S if ...
-                                // S' and T are object types and, for each member M in T..
-                                // M is a property and S' contains a property N where
-                                // if M is a required property, N is also a required property
-                                // (M - property in T)
-                                // (N - property in S)
-                                if (reportErrors) {
-                                    reportError(ts.Diagnostics.Property_0_is_optional_in_type_1_but_required_in_type_2, symbolToString(targetProp), typeToString(source), typeToString(target));
-                                }
-                                return 0 /* False */;
-                            }
-                        }
+                    else if (distance < bestDistance) {
+                        bestDistance = distance;
+                        bestCandidate = candidate;
                     }
                 }
-                return result;
             }
-            function propertiesIdenticalTo(source, target) {
-                if (!(source.flags & 2588672 /* ObjectType */ && target.flags & 2588672 /* ObjectType */)) {
-                    return 0 /* False */;
-                }
-                var sourceProperties = getPropertiesOfObjectType(source);
-                var targetProperties = getPropertiesOfObjectType(target);
-                if (sourceProperties.length !== targetProperties.length) {
-                    return 0 /* False */;
+            return bestCandidate;
+        }
+        function markPropertyAsReferenced(prop) {
+            if (prop &&
+                noUnusedIdentifiers &&
+                (prop.flags & 106500 /* ClassMember */) &&
+                prop.valueDeclaration && (ts.getModifierFlags(prop.valueDeclaration) & 8 /* Private */)) {
+                if (ts.getCheckFlags(prop) & 1 /* Instantiated */) {
+                    getSymbolLinks(prop).target.isReferenced = true;
                 }
-                var result = -1 /* True */;
-                for (var _i = 0, sourceProperties_1 = sourceProperties; _i < sourceProperties_1.length; _i++) {
-                    var sourceProp = sourceProperties_1[_i];
-                    var targetProp = getPropertyOfObjectType(target, sourceProp.name);
-                    if (!targetProp) {
-                        return 0 /* False */;
-                    }
-                    var related = compareProperties(sourceProp, targetProp, isRelatedTo);
-                    if (!related) {
-                        return 0 /* False */;
-                    }
-                    result &= related;
+                else {
+                    prop.isReferenced = true;
                 }
-                return result;
             }
-            function signaturesRelatedTo(source, target, kind, reportErrors) {
-                if (relation === identityRelation) {
-                    return signaturesIdenticalTo(source, target, kind);
-                }
-                if (target === anyFunctionType || source === anyFunctionType) {
-                    return -1 /* True */;
+        }
+        function isInPropertyInitializer(node) {
+            while (node) {
+                if (node.parent && node.parent.kind === 149 /* PropertyDeclaration */ && node.parent.initializer === node) {
+                    return true;
                 }
-                var sourceSignatures = getSignaturesOfType(source, kind);
-                var targetSignatures = getSignaturesOfType(target, kind);
-                if (kind === 1 /* Construct */ && sourceSignatures.length && targetSignatures.length) {
-                    if (isAbstractConstructorType(source) && !isAbstractConstructorType(target)) {
-                        // An abstract constructor type is not assignable to a non-abstract constructor type
-                        // as it would otherwise be possible to new an abstract class. Note that the assignability
-                        // check we perform for an extends clause excludes construct signatures from the target,
-                        // so this check never proceeds.
-                        if (reportErrors) {
-                            reportError(ts.Diagnostics.Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type);
-                        }
-                        return 0 /* False */;
-                    }
-                    if (!constructorVisibilitiesAreCompatible(sourceSignatures[0], targetSignatures[0], reportErrors)) {
-                        return 0 /* False */;
-                    }
+                node = node.parent;
+            }
+            return false;
+        }
+        function isValidPropertyAccess(node, propertyName) {
+            var left = node.kind === 179 /* PropertyAccessExpression */
+                ? node.expression
+                : node.left;
+            return isValidPropertyAccessWithType(node, left, propertyName, getWidenedType(checkExpression(left)));
+        }
+        function isValidPropertyAccessWithType(node, left, propertyName, type) {
+            if (type !== unknownType && !isTypeAny(type)) {
+                var prop = getPropertyOfType(type, propertyName);
+                if (prop) {
+                    return checkPropertyAccessibility(node, left, type, prop);
                 }
-                var result = -1 /* True */;
-                var saveErrorInfo = errorInfo;
-                outer: for (var _i = 0, targetSignatures_1 = targetSignatures; _i < targetSignatures_1.length; _i++) {
-                    var t = targetSignatures_1[_i];
-                    // Only elaborate errors from the first failure
-                    var shouldElaborateErrors = reportErrors;
-                    for (var _a = 0, sourceSignatures_1 = sourceSignatures; _a < sourceSignatures_1.length; _a++) {
-                        var s = sourceSignatures_1[_a];
-                        var related = signatureRelatedTo(s, t, shouldElaborateErrors);
-                        if (related) {
-                            result &= related;
-                            errorInfo = saveErrorInfo;
-                            continue outer;
+                // In js files properties of unions are allowed in completion
+                if (ts.isInJavaScriptFile(left) && (type.flags & 65536 /* Union */)) {
+                    for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                        var elementType = _a[_i];
+                        if (isValidPropertyAccessWithType(node, left, propertyName, elementType)) {
+                            return true;
                         }
-                        shouldElaborateErrors = false;
-                    }
-                    if (shouldElaborateErrors) {
-                        reportError(ts.Diagnostics.Type_0_provides_no_match_for_the_signature_1, typeToString(source), signatureToString(t, /*enclosingDeclaration*/ undefined, /*flags*/ undefined, kind));
                     }
-                    return 0 /* False */;
                 }
-                return result;
-            }
-            /**
-             * See signatureAssignableTo, compareSignaturesIdentical
-             */
-            function signatureRelatedTo(source, target, reportErrors) {
-                return compareSignaturesRelated(source, target, /*ignoreReturnTypes*/ false, reportErrors, reportError, isRelatedTo);
+                return false;
             }
-            function signaturesIdenticalTo(source, target, kind) {
-                var sourceSignatures = getSignaturesOfType(source, kind);
-                var targetSignatures = getSignaturesOfType(target, kind);
-                if (sourceSignatures.length !== targetSignatures.length) {
-                    return 0 /* False */;
-                }
-                var result = -1 /* True */;
-                for (var i = 0, len = sourceSignatures.length; i < len; i++) {
-                    var related = compareSignaturesIdentical(sourceSignatures[i], targetSignatures[i], /*partialMatch*/ false, /*ignoreThisTypes*/ false, /*ignoreReturnTypes*/ false, isRelatedTo);
-                    if (!related) {
-                        return 0 /* False */;
-                    }
-                    result &= related;
+            return true;
+        }
+        /**
+         * Return the symbol of the for-in variable declared or referenced by the given for-in statement.
+         */
+        function getForInVariableSymbol(node) {
+            var initializer = node.initializer;
+            if (initializer.kind === 227 /* VariableDeclarationList */) {
+                var variable = initializer.declarations[0];
+                if (variable && !ts.isBindingPattern(variable.name)) {
+                    return getSymbolOfNode(variable);
                 }
-                return result;
             }
-            function eachPropertyRelatedTo(source, target, kind, reportErrors) {
-                var result = -1 /* True */;
-                for (var _i = 0, _a = getPropertiesOfObjectType(source); _i < _a.length; _i++) {
-                    var prop = _a[_i];
-                    if (kind === 0 /* String */ || isNumericLiteralName(prop.name)) {
-                        var related = isRelatedTo(getTypeOfSymbol(prop), target, reportErrors);
-                        if (!related) {
-                            if (reportErrors) {
-                                reportError(ts.Diagnostics.Property_0_is_incompatible_with_index_signature, symbolToString(prop));
-                            }
-                            return 0 /* False */;
+            else if (initializer.kind === 71 /* Identifier */) {
+                return getResolvedSymbol(initializer);
+            }
+            return undefined;
+        }
+        /**
+         * Return true if the given type is considered to have numeric property names.
+         */
+        function hasNumericPropertyNames(type) {
+            return getIndexTypeOfType(type, 1 /* Number */) && !getIndexTypeOfType(type, 0 /* String */);
+        }
+        /**
+         * Return true if given node is an expression consisting of an identifier (possibly parenthesized)
+         * that references a for-in variable for an object with numeric property names.
+         */
+        function isForInVariableForNumericPropertyNames(expr) {
+            var e = ts.skipParentheses(expr);
+            if (e.kind === 71 /* Identifier */) {
+                var symbol = getResolvedSymbol(e);
+                if (symbol.flags & 3 /* Variable */) {
+                    var child = expr;
+                    var node = expr.parent;
+                    while (node) {
+                        if (node.kind === 215 /* ForInStatement */ &&
+                            child === node.statement &&
+                            getForInVariableSymbol(node) === symbol &&
+                            hasNumericPropertyNames(getTypeOfExpression(node.expression))) {
+                            return true;
                         }
-                        result &= related;
+                        child = node;
+                        node = node.parent;
                     }
                 }
-                return result;
             }
-            function indexInfoRelatedTo(sourceInfo, targetInfo, reportErrors) {
-                var related = isRelatedTo(sourceInfo.type, targetInfo.type, reportErrors);
-                if (!related && reportErrors) {
-                    reportError(ts.Diagnostics.Index_signatures_are_incompatible);
+            return false;
+        }
+        function checkIndexedAccess(node) {
+            var objectType = checkNonNullExpression(node.expression);
+            var indexExpression = node.argumentExpression;
+            if (!indexExpression) {
+                var sourceFile = ts.getSourceFileOfNode(node);
+                if (node.parent.kind === 182 /* NewExpression */ && node.parent.expression === node) {
+                    var start = ts.skipTrivia(sourceFile.text, node.expression.end);
+                    var end = node.end;
+                    grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead);
                 }
-                return related;
-            }
-            function indexTypesRelatedTo(source, originalSource, target, kind, reportErrors) {
-                if (relation === identityRelation) {
-                    return indexTypesIdenticalTo(source, target, kind);
+                else {
+                    var start = node.end - "]".length;
+                    var end = node.end;
+                    grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.Expression_expected);
                 }
-                var targetInfo = getIndexInfoOfType(target, kind);
-                if (!targetInfo || ((targetInfo.type.flags & 1 /* Any */) && !(originalSource.flags & 8190 /* Primitive */))) {
-                    // Index signature of type any permits assignment from everything but primitives
-                    return -1 /* True */;
+                return unknownType;
+            }
+            var indexType = isForInVariableForNumericPropertyNames(indexExpression) ? numberType : checkExpression(indexExpression);
+            if (objectType === unknownType || objectType === silentNeverType) {
+                return objectType;
+            }
+            if (isConstEnumObjectType(objectType) && indexExpression.kind !== 9 /* StringLiteral */) {
+                error(indexExpression, ts.Diagnostics.A_const_enum_member_can_only_be_accessed_using_a_string_literal);
+                return unknownType;
+            }
+            return checkIndexedAccessIndexType(getIndexedAccessType(objectType, indexType, node), node);
+        }
+        function checkThatExpressionIsProperSymbolReference(expression, expressionType, reportError) {
+            if (expressionType === unknownType) {
+                // There is already an error, so no need to report one.
+                return false;
+            }
+            if (!ts.isWellKnownSymbolSyntactically(expression)) {
+                return false;
+            }
+            // Make sure the property type is the primitive symbol type
+            if ((expressionType.flags & 512 /* ESSymbol */) === 0) {
+                if (reportError) {
+                    error(expression, ts.Diagnostics.A_computed_property_name_of_the_form_0_must_be_of_type_symbol, ts.getTextOfNode(expression));
                 }
-                var sourceInfo = getIndexInfoOfType(source, kind) ||
-                    kind === 1 /* Number */ && getIndexInfoOfType(source, 0 /* String */);
-                if (sourceInfo) {
-                    return indexInfoRelatedTo(sourceInfo, targetInfo, reportErrors);
+                return false;
+            }
+            // The name is Symbol.<someName>, so make sure Symbol actually resolves to the
+            // global Symbol object
+            var leftHandSide = expression.expression;
+            var leftHandSideSymbol = getResolvedSymbol(leftHandSide);
+            if (!leftHandSideSymbol) {
+                return false;
+            }
+            var globalESSymbol = getGlobalESSymbolConstructorSymbol(/*reportErrors*/ true);
+            if (!globalESSymbol) {
+                // Already errored when we tried to look up the symbol
+                return false;
+            }
+            if (leftHandSideSymbol !== globalESSymbol) {
+                if (reportError) {
+                    error(leftHandSide, ts.Diagnostics.Symbol_reference_does_not_refer_to_the_global_Symbol_constructor_object);
                 }
-                if (isObjectLiteralType(source)) {
-                    var related = -1 /* True */;
-                    if (kind === 0 /* String */) {
-                        var sourceNumberInfo = getIndexInfoOfType(source, 1 /* Number */);
-                        if (sourceNumberInfo) {
-                            related = indexInfoRelatedTo(sourceNumberInfo, targetInfo, reportErrors);
-                        }
+                return false;
+            }
+            return true;
+        }
+        function callLikeExpressionMayHaveTypeArguments(node) {
+            // TODO: Also include tagged templates (https://github.com/Microsoft/TypeScript/issues/11947)
+            return ts.isCallOrNewExpression(node);
+        }
+        function resolveUntypedCall(node) {
+            if (callLikeExpressionMayHaveTypeArguments(node)) {
+                // Check type arguments even though we will give an error that untyped calls may not accept type arguments.
+                // This gets us diagnostics for the type arguments and marks them as referenced.
+                ts.forEach(node.typeArguments, checkSourceElement);
+            }
+            if (node.kind === 183 /* TaggedTemplateExpression */) {
+                checkExpression(node.template);
+            }
+            else if (node.kind !== 147 /* Decorator */) {
+                ts.forEach(node.arguments, function (argument) {
+                    checkExpression(argument);
+                });
+            }
+            return anySignature;
+        }
+        function resolveErrorCall(node) {
+            resolveUntypedCall(node);
+            return unknownSignature;
+        }
+        // Re-order candidate signatures into the result array. Assumes the result array to be empty.
+        // The candidate list orders groups in reverse, but within a group signatures are kept in declaration order
+        // A nit here is that we reorder only signatures that belong to the same symbol,
+        // so order how inherited signatures are processed is still preserved.
+        // interface A { (x: string): void }
+        // interface B extends A { (x: 'foo'): string }
+        // const b: B;
+        // b('foo') // <- here overloads should be processed as [(x:'foo'): string, (x: string): void]
+        function reorderCandidates(signatures, result) {
+            var lastParent;
+            var lastSymbol;
+            var cutoffIndex = 0;
+            var index;
+            var specializedIndex = -1;
+            var spliceIndex;
+            ts.Debug.assert(!result.length);
+            for (var _i = 0, signatures_4 = signatures; _i < signatures_4.length; _i++) {
+                var signature = signatures_4[_i];
+                var symbol = signature.declaration && getSymbolOfNode(signature.declaration);
+                var parent_12 = signature.declaration && signature.declaration.parent;
+                if (!lastSymbol || symbol === lastSymbol) {
+                    if (lastParent && parent_12 === lastParent) {
+                        index++;
                     }
-                    if (related) {
-                        related &= eachPropertyRelatedTo(source, targetInfo.type, kind, reportErrors);
+                    else {
+                        lastParent = parent_12;
+                        index = cutoffIndex;
                     }
-                    return related;
                 }
-                if (reportErrors) {
-                    reportError(ts.Diagnostics.Index_signature_is_missing_in_type_0, typeToString(source));
+                else {
+                    // current declaration belongs to a different symbol
+                    // set cutoffIndex so re-orderings in the future won't change result set from 0 to cutoffIndex
+                    index = cutoffIndex = result.length;
+                    lastParent = parent_12;
                 }
-                return 0 /* False */;
-            }
-            function indexTypesIdenticalTo(source, target, indexKind) {
-                var targetInfo = getIndexInfoOfType(target, indexKind);
-                var sourceInfo = getIndexInfoOfType(source, indexKind);
-                if (!sourceInfo && !targetInfo) {
-                    return -1 /* True */;
+                lastSymbol = symbol;
+                // specialized signatures always need to be placed before non-specialized signatures regardless
+                // of the cutoff position; see GH#1133
+                if (signature.hasLiteralTypes) {
+                    specializedIndex++;
+                    spliceIndex = specializedIndex;
+                    // The cutoff index always needs to be greater than or equal to the specialized signature index
+                    // in order to prevent non-specialized signatures from being added before a specialized
+                    // signature.
+                    cutoffIndex++;
                 }
-                if (sourceInfo && targetInfo && sourceInfo.isReadonly === targetInfo.isReadonly) {
-                    return isRelatedTo(sourceInfo.type, targetInfo.type);
+                else {
+                    spliceIndex = index;
                 }
-                return 0 /* False */;
+                result.splice(spliceIndex, 0, signature);
             }
-            function constructorVisibilitiesAreCompatible(sourceSignature, targetSignature, reportErrors) {
-                if (!sourceSignature.declaration || !targetSignature.declaration) {
-                    return true;
-                }
-                var sourceAccessibility = ts.getModifierFlags(sourceSignature.declaration) & 24 /* NonPublicAccessibilityModifier */;
-                var targetAccessibility = ts.getModifierFlags(targetSignature.declaration) & 24 /* NonPublicAccessibilityModifier */;
-                // A public, protected and private signature is assignable to a private signature.
-                if (targetAccessibility === 8 /* Private */) {
-                    return true;
+        }
+        function getSpreadArgumentIndex(args) {
+            for (var i = 0; i < args.length; i++) {
+                var arg = args[i];
+                if (arg && arg.kind === 198 /* SpreadElement */) {
+                    return i;
                 }
-                // A public and protected signature is assignable to a protected signature.
-                if (targetAccessibility === 16 /* Protected */ && sourceAccessibility !== 8 /* Private */) {
-                    return true;
+            }
+            return -1;
+        }
+        function hasCorrectArity(node, args, signature, signatureHelpTrailingComma) {
+            if (signatureHelpTrailingComma === void 0) { signatureHelpTrailingComma = false; }
+            var argCount; // Apparent number of arguments we will have in this call
+            var typeArguments; // Type arguments (undefined if none)
+            var callIsIncomplete; // In incomplete call we want to be lenient when we have too few arguments
+            var isDecorator;
+            var spreadArgIndex = -1;
+            if (ts.isJsxOpeningLikeElement(node)) {
+                // The arity check will be done in "checkApplicableSignatureForJsxOpeningLikeElement".
+                return true;
+            }
+            if (node.kind === 183 /* TaggedTemplateExpression */) {
+                var tagExpression = node;
+                // Even if the call is incomplete, we'll have a missing expression as our last argument,
+                // so we can say the count is just the arg list length
+                argCount = args.length;
+                typeArguments = undefined;
+                if (tagExpression.template.kind === 196 /* TemplateExpression */) {
+                    // If a tagged template expression lacks a tail literal, the call is incomplete.
+                    // Specifically, a template only can end in a TemplateTail or a Missing literal.
+                    var templateExpression = tagExpression.template;
+                    var lastSpan = ts.lastOrUndefined(templateExpression.templateSpans);
+                    ts.Debug.assert(lastSpan !== undefined); // we should always have at least one span.
+                    callIsIncomplete = ts.nodeIsMissing(lastSpan.literal) || !!lastSpan.literal.isUnterminated;
                 }
-                // Only a public signature is assignable to public signature.
-                if (targetAccessibility !== 16 /* Protected */ && !sourceAccessibility) {
-                    return true;
+                else {
+                    // If the template didn't end in a backtick, or its beginning occurred right prior to EOF,
+                    // then this might actually turn out to be a TemplateHead in the future;
+                    // so we consider the call to be incomplete.
+                    var templateLiteral = tagExpression.template;
+                    ts.Debug.assert(templateLiteral.kind === 13 /* NoSubstitutionTemplateLiteral */);
+                    callIsIncomplete = !!templateLiteral.isUnterminated;
                 }
-                if (reportErrors) {
-                    reportError(ts.Diagnostics.Cannot_assign_a_0_constructor_type_to_a_1_constructor_type, visibilityToString(sourceAccessibility), visibilityToString(targetAccessibility));
+            }
+            else if (node.kind === 147 /* Decorator */) {
+                isDecorator = true;
+                typeArguments = undefined;
+                argCount = getEffectiveArgumentCount(node, /*args*/ undefined, signature);
+            }
+            else {
+                var callExpression = node;
+                if (!callExpression.arguments) {
+                    // This only happens when we have something of the form: 'new C'
+                    ts.Debug.assert(callExpression.kind === 182 /* NewExpression */);
+                    return signature.minArgumentCount === 0;
                 }
+                argCount = signatureHelpTrailingComma ? args.length + 1 : args.length;
+                // If we are missing the close parenthesis, the call is incomplete.
+                callIsIncomplete = callExpression.arguments.end === callExpression.end;
+                typeArguments = callExpression.typeArguments;
+                spreadArgIndex = getSpreadArgumentIndex(args);
+            }
+            // If the user supplied type arguments, but the number of type arguments does not match
+            // the declared number of type parameters, the call has an incorrect arity.
+            var numTypeParameters = ts.length(signature.typeParameters);
+            var minTypeArgumentCount = getMinTypeArgumentCount(signature.typeParameters);
+            var hasRightNumberOfTypeArgs = !typeArguments ||
+                (typeArguments.length >= minTypeArgumentCount && typeArguments.length <= numTypeParameters);
+            if (!hasRightNumberOfTypeArgs) {
                 return false;
             }
-        }
-        // Return true if the given type is the constructor type for an abstract class
-        function isAbstractConstructorType(type) {
-            if (type.flags & 2097152 /* Anonymous */) {
-                var symbol = type.symbol;
-                if (symbol && symbol.flags & 32 /* Class */) {
-                    var declaration = getClassLikeDeclarationOfSymbol(symbol);
-                    if (declaration && ts.getModifierFlags(declaration) & 128 /* Abstract */) {
-                        return true;
-                    }
-                }
+            // If spread arguments are present, check that they correspond to a rest parameter. If so, no
+            // further checking is necessary.
+            if (spreadArgIndex >= 0) {
+                return isRestParameterIndex(signature, spreadArgIndex) || spreadArgIndex >= signature.minArgumentCount;
             }
-            return false;
+            // Too many arguments implies incorrect arity.
+            if (!signature.hasRestParameter && argCount > signature.parameters.length) {
+                return false;
+            }
+            // If the call is incomplete, we should skip the lower bound check.
+            var hasEnoughArguments = argCount >= signature.minArgumentCount;
+            return callIsIncomplete || hasEnoughArguments;
         }
-        // Return true if the given type is part of a deeply nested chain of generic instantiations. We consider this to be the case
-        // when structural type comparisons have been started for 10 or more instantiations of the same generic type. It is possible,
-        // though highly unlikely, for this test to be true in a situation where a chain of instantiations is not infinitely expanding.
-        // Effectively, we will generate a false positive when two types are structurally equal to at least 10 levels, but unequal at
-        // some level beyond that.
-        function isDeeplyNestedGeneric(type, stack, depth) {
-            // We track type references (created by createTypeReference) and instantiated types (created by instantiateType)
-            if (type.flags & (131072 /* Reference */ | 4194304 /* Instantiated */) && depth >= 5) {
-                var symbol = type.symbol;
-                var count = 0;
-                for (var i = 0; i < depth; i++) {
-                    var t = stack[i];
-                    if (t.flags & (131072 /* Reference */ | 4194304 /* Instantiated */) && t.symbol === symbol) {
-                        count++;
-                        if (count >= 5)
-                            return true;
-                    }
+        // If type has a single call signature and no other members, return that signature. Otherwise, return undefined.
+        function getSingleCallSignature(type) {
+            if (type.flags & 32768 /* Object */) {
+                var resolved = resolveStructuredTypeMembers(type);
+                if (resolved.callSignatures.length === 1 && resolved.constructSignatures.length === 0 &&
+                    resolved.properties.length === 0 && !resolved.stringIndexInfo && !resolved.numberIndexInfo) {
+                    return resolved.callSignatures[0];
                 }
             }
-            return false;
-        }
-        function isPropertyIdenticalTo(sourceProp, targetProp) {
-            return compareProperties(sourceProp, targetProp, compareTypesIdentical) !== 0 /* False */;
+            return undefined;
         }
-        function compareProperties(sourceProp, targetProp, compareTypes) {
-            // Two members are considered identical when
-            // - they are public properties with identical names, optionality, and types,
-            // - they are private or protected properties originating in the same declaration and having identical types
-            if (sourceProp === targetProp) {
-                return -1 /* True */;
+        // Instantiate a generic signature in the context of a non-generic signature (section 3.8.5 in TypeScript spec)
+        function instantiateSignatureInContextOf(signature, contextualSignature, contextualMapper) {
+            var context = createInferenceContext(signature, 1 /* InferUnionTypes */);
+            forEachMatchingParameterType(contextualSignature, signature, function (source, target) {
+                // Type parameters from outer context referenced by source type are fixed by instantiation of the source type
+                inferTypes(context.inferences, instantiateType(source, contextualMapper || identityMapper), target);
+            });
+            if (!contextualMapper) {
+                inferTypes(context.inferences, getReturnTypeOfSignature(contextualSignature), getReturnTypeOfSignature(signature), 4 /* ReturnType */);
             }
-            var sourcePropAccessibility = getDeclarationModifierFlagsFromSymbol(sourceProp) & 24 /* NonPublicAccessibilityModifier */;
-            var targetPropAccessibility = getDeclarationModifierFlagsFromSymbol(targetProp) & 24 /* NonPublicAccessibilityModifier */;
-            if (sourcePropAccessibility !== targetPropAccessibility) {
-                return 0 /* False */;
+            return getSignatureInstantiation(signature, getInferredTypes(context));
+        }
+        function inferTypeArguments(node, signature, args, excludeArgument, context) {
+            var inferences = context.inferences;
+            // Clear out all the inference results from the last time inferTypeArguments was called on this context
+            for (var i = 0; i < inferences.length; i++) {
+                // As an optimization, we don't have to clear (and later recompute) inferred types
+                // for type parameters that have already been fixed on the previous call to inferTypeArguments.
+                // It would be just as correct to reset all of them. But then we'd be repeating the same work
+                // for the type parameters that were fixed, namely the work done by getInferredType.
+                if (!inferences[i].isFixed) {
+                    inferences[i].inferredType = undefined;
+                }
             }
-            if (sourcePropAccessibility) {
-                if (getTargetSymbol(sourceProp) !== getTargetSymbol(targetProp)) {
-                    return 0 /* False */;
+            // If a contextual type is available, infer from that type to the return type of the call expression. For
+            // example, given a 'function wrap<T, U>(cb: (x: T) => U): (x: T) => U' and a call expression
+            // 'let f: (x: string) => number = wrap(s => s.length)', we infer from the declared type of 'f' to the
+            // return type of 'wrap'.
+            if (ts.isExpression(node)) {
+                var contextualType = getContextualType(node);
+                if (contextualType) {
+                    // We clone the contextual mapper to avoid disturbing a resolution in progress for an
+                    // outer call expression. Effectively we just want a snapshot of whatever has been
+                    // inferred for any outer call expression so far.
+                    var instantiatedType = instantiateType(contextualType, cloneTypeMapper(getContextualMapper(node)));
+                    // If the contextual type is a generic function type with a single call signature, we
+                    // instantiate the type with its own type parameters and type arguments. This ensures that
+                    // the type parameters are not erased to type any during type inference such that they can
+                    // be inferred as actual types from the contextual type. For example:
+                    //   declare function arrayMap<T, U>(f: (x: T) => U): (a: T[]) => U[];
+                    //   const boxElements: <A>(a: A[]) => { value: A }[] = arrayMap(value => ({ value }));
+                    // Above, the type of the 'value' parameter is inferred to be 'A'.
+                    var contextualSignature = getSingleCallSignature(instantiatedType);
+                    var inferenceSourceType = contextualSignature && contextualSignature.typeParameters ?
+                        getOrCreateTypeFromSignature(getSignatureInstantiation(contextualSignature, contextualSignature.typeParameters)) :
+                        instantiatedType;
+                    var inferenceTargetType = getReturnTypeOfSignature(signature);
+                    // Inferences made from return types have lower priority than all other inferences.
+                    inferTypes(context.inferences, inferenceSourceType, inferenceTargetType, 4 /* ReturnType */);
                 }
             }
-            else {
-                if ((sourceProp.flags & 536870912 /* Optional */) !== (targetProp.flags & 536870912 /* Optional */)) {
-                    return 0 /* False */;
+            var thisType = getThisTypeOfSignature(signature);
+            if (thisType) {
+                var thisArgumentNode = getThisArgumentOfCall(node);
+                var thisArgumentType = thisArgumentNode ? checkExpression(thisArgumentNode) : voidType;
+                inferTypes(context.inferences, thisArgumentType, thisType);
+            }
+            // We perform two passes over the arguments. In the first pass we infer from all arguments, but use
+            // wildcards for all context sensitive function expressions.
+            var argCount = getEffectiveArgumentCount(node, args, signature);
+            for (var i = 0; i < argCount; i++) {
+                var arg = getEffectiveArgument(node, args, i);
+                // If the effective argument is 'undefined', then it is an argument that is present but is synthetic.
+                if (arg === undefined || arg.kind !== 200 /* OmittedExpression */) {
+                    var paramType = getTypeAtPosition(signature, i);
+                    var argType = getEffectiveArgumentType(node, i);
+                    // If the effective argument type is 'undefined', there is no synthetic type
+                    // for the argument. In that case, we should check the argument.
+                    if (argType === undefined) {
+                        // For context sensitive arguments we pass the identityMapper, which is a signal to treat all
+                        // context sensitive function expressions as wildcards
+                        var mapper = excludeArgument && excludeArgument[i] !== undefined ? identityMapper : context;
+                        argType = checkExpressionWithContextualType(arg, paramType, mapper);
+                    }
+                    inferTypes(context.inferences, argType, paramType);
                 }
             }
-            if (isReadonlySymbol(sourceProp) !== isReadonlySymbol(targetProp)) {
-                return 0 /* False */;
+            // In the second pass we visit only context sensitive arguments, and only those that aren't excluded, this
+            // time treating function expressions normally (which may cause previously inferred type arguments to be fixed
+            // as we construct types for contextually typed parameters)
+            // Decorators will not have `excludeArgument`, as their arguments cannot be contextually typed.
+            // Tagged template expressions will always have `undefined` for `excludeArgument[0]`.
+            if (excludeArgument) {
+                for (var i = 0; i < argCount; i++) {
+                    // No need to check for omitted args and template expressions, their exclusion value is always undefined
+                    if (excludeArgument[i] === false) {
+                        var arg = args[i];
+                        var paramType = getTypeAtPosition(signature, i);
+                        inferTypes(context.inferences, checkExpressionWithContextualType(arg, paramType, context), paramType);
+                    }
+                }
             }
-            return compareTypes(getTypeOfSymbol(sourceProp), getTypeOfSymbol(targetProp));
+            return getInferredTypes(context);
         }
-        function isMatchingSignature(source, target, partialMatch) {
-            // A source signature matches a target signature if the two signatures have the same number of required,
-            // optional, and rest parameters.
-            if (source.parameters.length === target.parameters.length &&
-                source.minArgumentCount === target.minArgumentCount &&
-                source.hasRestParameter === target.hasRestParameter) {
-                return true;
-            }
-            // A source signature partially matches a target signature if the target signature has no fewer required
-            // parameters and no more overall parameters than the source signature (where a signature with a rest
-            // parameter is always considered to have more overall parameters than one without).
-            var sourceRestCount = source.hasRestParameter ? 1 : 0;
-            var targetRestCount = target.hasRestParameter ? 1 : 0;
-            if (partialMatch && source.minArgumentCount <= target.minArgumentCount && (sourceRestCount > targetRestCount ||
-                sourceRestCount === targetRestCount && source.parameters.length >= target.parameters.length)) {
-                return true;
+        function checkTypeArguments(signature, typeArgumentNodes, typeArgumentTypes, reportErrors, headMessage) {
+            var typeParameters = signature.typeParameters;
+            var typeArgumentsAreAssignable = true;
+            var mapper;
+            for (var i = 0; i < typeArgumentNodes.length; i++) {
+                if (typeArgumentsAreAssignable /* so far */) {
+                    var constraint = getConstraintOfTypeParameter(typeParameters[i]);
+                    if (constraint) {
+                        var errorInfo = void 0;
+                        var typeArgumentHeadMessage = ts.Diagnostics.Type_0_does_not_satisfy_the_constraint_1;
+                        if (reportErrors && headMessage) {
+                            errorInfo = ts.chainDiagnosticMessages(errorInfo, typeArgumentHeadMessage);
+                            typeArgumentHeadMessage = headMessage;
+                        }
+                        if (!mapper) {
+                            mapper = createTypeMapper(typeParameters, typeArgumentTypes);
+                        }
+                        var typeArgument = typeArgumentTypes[i];
+                        typeArgumentsAreAssignable = checkTypeAssignableTo(typeArgument, getTypeWithThisArgument(instantiateType(constraint, mapper), typeArgument), reportErrors ? typeArgumentNodes[i] : undefined, typeArgumentHeadMessage, errorInfo);
+                    }
+                }
             }
-            return false;
+            return typeArgumentsAreAssignable;
         }
         /**
-         * See signatureRelatedTo, compareSignaturesIdentical
+         * Check if the given signature can possibly be a signature called by the JSX opening-like element.
+         * @param node a JSX opening-like element we are trying to figure its call signature
+         * @param signature a candidate signature we are trying whether it is a call signature
+         * @param relation a relationship to check parameter and argument type
+         * @param excludeArgument
          */
-        function compareSignaturesIdentical(source, target, partialMatch, ignoreThisTypes, ignoreReturnTypes, compareTypes) {
-            // TODO (drosen): De-duplicate code between related functions.
-            if (source === target) {
-                return -1 /* True */;
+        function checkApplicableSignatureForJsxOpeningLikeElement(node, signature, relation) {
+            // JSX opening-like element has correct arity for stateless-function component if the one of the following condition is true:
+            //      1. callIsIncomplete
+            //      2. attributes property has same number of properties as the parameter object type.
+            //         We can figure that out by resolving attributes property and check number of properties in the resolved type
+            // If the call has correct arity, we will then check if the argument type and parameter type is assignable
+            var callIsIncomplete = node.attributes.end === node.end; // If we are missing the close "/>", the call is incomplete
+            if (callIsIncomplete) {
+                return true;
             }
-            if (!(isMatchingSignature(source, target, partialMatch))) {
-                return 0 /* False */;
+            var headMessage = ts.Diagnostics.Argument_of_type_0_is_not_assignable_to_parameter_of_type_1;
+            // Stateless function components can have maximum of three arguments: "props", "context", and "updater".
+            // However "context" and "updater" are implicit and can't be specify by users. Only the first parameter, props,
+            // can be specified by users through attributes property.
+            var paramType = getTypeAtPosition(signature, 0);
+            var attributesType = checkExpressionWithContextualType(node.attributes, paramType, /*contextualMapper*/ undefined);
+            var argProperties = getPropertiesOfType(attributesType);
+            for (var _i = 0, argProperties_1 = argProperties; _i < argProperties_1.length; _i++) {
+                var arg = argProperties_1[_i];
+                if (!getPropertyOfType(paramType, arg.name) && isUnhyphenatedJsxName(arg.name)) {
+                    return false;
+                }
             }
-            // Check that the two signatures have the same number of type parameters. We might consider
-            // also checking that any type parameter constraints match, but that would require instantiating
-            // the constraints with a common set of type arguments to get relatable entities in places where
-            // type parameters occur in the constraints. The complexity of doing that doesn't seem worthwhile,
-            // particularly as we're comparing erased versions of the signatures below.
-            if ((source.typeParameters ? source.typeParameters.length : 0) !== (target.typeParameters ? target.typeParameters.length : 0)) {
-                return 0 /* False */;
+            return checkTypeRelatedTo(attributesType, paramType, relation, /*errorNode*/ undefined, headMessage);
+        }
+        function checkApplicableSignature(node, args, signature, relation, excludeArgument, reportErrors) {
+            if (ts.isJsxOpeningLikeElement(node)) {
+                return checkApplicableSignatureForJsxOpeningLikeElement(node, signature, relation);
             }
-            // Spec 1.0 Section 3.8.3 & 3.8.4:
-            // M and N (the signatures) are instantiated using type Any as the type argument for all type parameters declared by M and N
-            source = getErasedSignature(source);
-            target = getErasedSignature(target);
-            var result = -1 /* True */;
-            if (!ignoreThisTypes) {
-                var sourceThisType = getThisTypeOfSignature(source);
-                if (sourceThisType) {
-                    var targetThisType = getThisTypeOfSignature(target);
-                    if (targetThisType) {
-                        var related = compareTypes(sourceThisType, targetThisType);
-                        if (!related) {
-                            return 0 /* False */;
-                        }
-                        result &= related;
+            var thisType = getThisTypeOfSignature(signature);
+            if (thisType && thisType !== voidType && node.kind !== 182 /* NewExpression */) {
+                // If the called expression is not of the form `x.f` or `x["f"]`, then sourceType = voidType
+                // If the signature's 'this' type is voidType, then the check is skipped -- anything is compatible.
+                // If the expression is a new expression, then the check is skipped.
+                var thisArgumentNode = getThisArgumentOfCall(node);
+                var thisArgumentType = thisArgumentNode ? checkExpression(thisArgumentNode) : voidType;
+                var errorNode = reportErrors ? (thisArgumentNode || node) : undefined;
+                var headMessage_1 = ts.Diagnostics.The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1;
+                if (!checkTypeRelatedTo(thisArgumentType, getThisTypeOfSignature(signature), relation, errorNode, headMessage_1)) {
+                    return false;
+                }
+            }
+            var headMessage = ts.Diagnostics.Argument_of_type_0_is_not_assignable_to_parameter_of_type_1;
+            var argCount = getEffectiveArgumentCount(node, args, signature);
+            for (var i = 0; i < argCount; i++) {
+                var arg = getEffectiveArgument(node, args, i);
+                // If the effective argument is 'undefined', then it is an argument that is present but is synthetic.
+                if (arg === undefined || arg.kind !== 200 /* OmittedExpression */) {
+                    // Check spread elements against rest type (from arity check we know spread argument corresponds to a rest parameter)
+                    var paramType = getTypeAtPosition(signature, i);
+                    var argType = getEffectiveArgumentType(node, i);
+                    // If the effective argument type is 'undefined', there is no synthetic type
+                    // for the argument. In that case, we should check the argument.
+                    if (argType === undefined) {
+                        argType = checkExpressionWithContextualType(arg, paramType, excludeArgument && excludeArgument[i] ? identityMapper : undefined);
+                    }
+                    // Use argument expression as error location when reporting errors
+                    var errorNode = reportErrors ? getEffectiveArgumentErrorNode(node, i, arg) : undefined;
+                    if (!checkTypeRelatedTo(argType, paramType, relation, errorNode, headMessage)) {
+                        return false;
                     }
                 }
             }
-            var targetLen = target.parameters.length;
-            for (var i = 0; i < targetLen; i++) {
-                var s = isRestParameterIndex(source, i) ? getRestTypeOfSignature(source) : getTypeOfParameter(source.parameters[i]);
-                var t = isRestParameterIndex(target, i) ? getRestTypeOfSignature(target) : getTypeOfParameter(target.parameters[i]);
-                var related = compareTypes(s, t);
-                if (!related) {
-                    return 0 /* False */;
+            return true;
+        }
+        /**
+         * Returns the this argument in calls like x.f(...) and x[f](...). Undefined otherwise.
+         */
+        function getThisArgumentOfCall(node) {
+            if (node.kind === 181 /* CallExpression */) {
+                var callee = node.expression;
+                if (callee.kind === 179 /* PropertyAccessExpression */) {
+                    return callee.expression;
+                }
+                else if (callee.kind === 180 /* ElementAccessExpression */) {
+                    return callee.expression;
                 }
-                result &= related;
             }
-            if (!ignoreReturnTypes) {
-                result &= compareTypes(getReturnTypeOfSignature(source), getReturnTypeOfSignature(target));
+        }
+        /**
+         * Returns the effective arguments for an expression that works like a function invocation.
+         *
+         * If 'node' is a CallExpression or a NewExpression, then its argument list is returned.
+         * If 'node' is a TaggedTemplateExpression, a new argument list is constructed from the substitution
+         *    expressions, where the first element of the list is `undefined`.
+         * If 'node' is a Decorator, the argument list will be `undefined`, and its arguments and types
+         *    will be supplied from calls to `getEffectiveArgumentCount` and `getEffectiveArgumentType`.
+         */
+        function getEffectiveCallArguments(node) {
+            var args;
+            if (node.kind === 183 /* TaggedTemplateExpression */) {
+                var template = node.template;
+                args = [undefined];
+                if (template.kind === 196 /* TemplateExpression */) {
+                    ts.forEach(template.templateSpans, function (span) {
+                        args.push(span.expression);
+                    });
+                }
             }
-            return result;
+            else if (node.kind === 147 /* Decorator */) {
+                // For a decorator, we return undefined as we will determine
+                // the number and types of arguments for a decorator using
+                // `getEffectiveArgumentCount` and `getEffectiveArgumentType` below.
+                return undefined;
+            }
+            else if (ts.isJsxOpeningLikeElement(node)) {
+                args = node.attributes.properties.length > 0 ? [node.attributes] : emptyArray;
+            }
+            else {
+                args = node.arguments || emptyArray;
+            }
+            return args;
         }
-        function isRestParameterIndex(signature, parameterIndex) {
-            return signature.hasRestParameter && parameterIndex >= signature.parameters.length - 1;
+        /**
+         * Returns the effective argument count for a node that works like a function invocation.
+         * If 'node' is a Decorator, the number of arguments is derived from the decoration
+         *    target and the signature:
+         *    If 'node.target' is a class declaration or class expression, the effective argument
+         *       count is 1.
+         *    If 'node.target' is a parameter declaration, the effective argument count is 3.
+         *    If 'node.target' is a property declaration, the effective argument count is 2.
+         *    If 'node.target' is a method or accessor declaration, the effective argument count
+         *       is 3, although it can be 2 if the signature only accepts two arguments, allowing
+         *       us to match a property decorator.
+         * Otherwise, the argument count is the length of the 'args' array.
+         */
+        function getEffectiveArgumentCount(node, args, signature) {
+            if (node.kind === 147 /* Decorator */) {
+                switch (node.parent.kind) {
+                    case 229 /* ClassDeclaration */:
+                    case 199 /* ClassExpression */:
+                        // A class decorator will have one argument (see `ClassDecorator` in core.d.ts)
+                        return 1;
+                    case 149 /* PropertyDeclaration */:
+                        // A property declaration decorator will have two arguments (see
+                        // `PropertyDecorator` in core.d.ts)
+                        return 2;
+                    case 151 /* MethodDeclaration */:
+                    case 153 /* GetAccessor */:
+                    case 154 /* SetAccessor */:
+                        // A method or accessor declaration decorator will have two or three arguments (see
+                        // `PropertyDecorator` and `MethodDecorator` in core.d.ts)
+                        // If we are emitting decorators for ES3, we will only pass two arguments.
+                        if (languageVersion === 0 /* ES3 */) {
+                            return 2;
+                        }
+                        // If the method decorator signature only accepts a target and a key, we will only
+                        // type check those arguments.
+                        return signature.parameters.length >= 3 ? 3 : 2;
+                    case 146 /* Parameter */:
+                        // A parameter declaration decorator will have three arguments (see
+                        // `ParameterDecorator` in core.d.ts)
+                        return 3;
+                }
+            }
+            else {
+                return args.length;
+            }
         }
-        function isSupertypeOfEach(candidate, types) {
-            for (var _i = 0, types_7 = types; _i < types_7.length; _i++) {
-                var t = types_7[_i];
-                if (candidate !== t && !isTypeSubtypeOf(t, candidate))
-                    return false;
+        /**
+         * Returns the effective type of the first argument to a decorator.
+         * If 'node' is a class declaration or class expression, the effective argument type
+         *    is the type of the static side of the class.
+         * If 'node' is a parameter declaration, the effective argument type is either the type
+         *    of the static or instance side of the class for the parameter's parent method,
+         *    depending on whether the method is declared static.
+         *    For a constructor, the type is always the type of the static side of the class.
+         * If 'node' is a property, method, or accessor declaration, the effective argument
+         *    type is the type of the static or instance side of the parent class for class
+         *    element, depending on whether the element is declared static.
+         */
+        function getEffectiveDecoratorFirstArgumentType(node) {
+            // The first argument to a decorator is its `target`.
+            if (node.kind === 229 /* ClassDeclaration */) {
+                // For a class decorator, the `target` is the type of the class (e.g. the
+                // "static" or "constructor" side of the class)
+                var classSymbol = getSymbolOfNode(node);
+                return getTypeOfSymbol(classSymbol);
             }
-            return true;
-        }
-        function literalTypesWithSameBaseType(types) {
-            var commonBaseType;
-            for (var _i = 0, types_8 = types; _i < types_8.length; _i++) {
-                var t = types_8[_i];
-                var baseType = getBaseTypeOfLiteralType(t);
-                if (!commonBaseType) {
-                    commonBaseType = baseType;
-                }
-                if (baseType === t || baseType !== commonBaseType) {
-                    return false;
+            if (node.kind === 146 /* Parameter */) {
+                // For a parameter decorator, the `target` is the parent type of the
+                // parameter's containing method.
+                node = node.parent;
+                if (node.kind === 152 /* Constructor */) {
+                    var classSymbol = getSymbolOfNode(node);
+                    return getTypeOfSymbol(classSymbol);
                 }
             }
-            return true;
-        }
-        // When the candidate types are all literal types with the same base type, the common
-        // supertype is a union of those literal types. Otherwise, the common supertype is the
-        // first type that is a supertype of each of the other types.
-        function getSupertypeOrUnion(types) {
-            return literalTypesWithSameBaseType(types) ? getUnionType(types) : ts.forEach(types, function (t) { return isSupertypeOfEach(t, types) ? t : undefined; });
+            if (node.kind === 149 /* PropertyDeclaration */ ||
+                node.kind === 151 /* MethodDeclaration */ ||
+                node.kind === 153 /* GetAccessor */ ||
+                node.kind === 154 /* SetAccessor */) {
+                // For a property or method decorator, the `target` is the
+                // "static"-side type of the parent of the member if the member is
+                // declared "static"; otherwise, it is the "instance"-side type of the
+                // parent of the member.
+                return getParentTypeOfClassElement(node);
+            }
+            ts.Debug.fail("Unsupported decorator target.");
+            return unknownType;
         }
-        function getCommonSupertype(types) {
-            if (!strictNullChecks) {
-                return getSupertypeOrUnion(types);
+        /**
+         * Returns the effective type for the second argument to a decorator.
+         * If 'node' is a parameter, its effective argument type is one of the following:
+         *    If 'node.parent' is a constructor, the effective argument type is 'any', as we
+         *       will emit `undefined`.
+         *    If 'node.parent' is a member with an identifier, numeric, or string literal name,
+         *       the effective argument type will be a string literal type for the member name.
+         *    If 'node.parent' is a computed property name, the effective argument type will
+         *       either be a symbol type or the string type.
+         * If 'node' is a member with an identifier, numeric, or string literal name, the
+         *    effective argument type will be a string literal type for the member name.
+         * If 'node' is a computed property name, the effective argument type will either
+         *    be a symbol type or the string type.
+         * A class decorator does not have a second argument type.
+         */
+        function getEffectiveDecoratorSecondArgumentType(node) {
+            // The second argument to a decorator is its `propertyKey`
+            if (node.kind === 229 /* ClassDeclaration */) {
+                ts.Debug.fail("Class decorators should not have a second synthetic argument.");
+                return unknownType;
             }
-            var primaryTypes = ts.filter(types, function (t) { return !(t.flags & 6144 /* Nullable */); });
-            if (!primaryTypes.length) {
-                return getUnionType(types, /*subtypeReduction*/ true);
-            }
-            var supertype = getSupertypeOrUnion(primaryTypes);
-            return supertype && includeFalsyTypes(supertype, getFalsyFlagsOfTypes(types) & 6144 /* Nullable */);
-        }
-        function reportNoCommonSupertypeError(types, errorLocation, errorMessageChainHead) {
-            // The downfallType/bestSupertypeDownfallType is the first type that caused a particular candidate
-            // to not be the common supertype. So if it weren't for this one downfallType (and possibly others),
-            // the type in question could have been the common supertype.
-            var bestSupertype;
-            var bestSupertypeDownfallType;
-            var bestSupertypeScore = 0;
-            for (var i = 0; i < types.length; i++) {
-                var score = 0;
-                var downfallType = undefined;
-                for (var j = 0; j < types.length; j++) {
-                    if (isTypeSubtypeOf(types[j], types[i])) {
-                        score++;
-                    }
-                    else if (!downfallType) {
-                        downfallType = types[j];
-                    }
-                }
-                ts.Debug.assert(!!downfallType, "If there is no common supertype, each type should have a downfallType");
-                if (score > bestSupertypeScore) {
-                    bestSupertype = types[i];
-                    bestSupertypeDownfallType = downfallType;
-                    bestSupertypeScore = score;
+            if (node.kind === 146 /* Parameter */) {
+                node = node.parent;
+                if (node.kind === 152 /* Constructor */) {
+                    // For a constructor parameter decorator, the `propertyKey` will be `undefined`.
+                    return anyType;
                 }
-                // types.length - 1 is the maximum score, given that getCommonSupertype returned false
-                if (bestSupertypeScore === types.length - 1) {
-                    break;
+                // For a non-constructor parameter decorator, the `propertyKey` will be either
+                // a string or a symbol, based on the name of the parameter's containing method.
+            }
+            if (node.kind === 149 /* PropertyDeclaration */ ||
+                node.kind === 151 /* MethodDeclaration */ ||
+                node.kind === 153 /* GetAccessor */ ||
+                node.kind === 154 /* SetAccessor */) {
+                // The `propertyKey` for a property or method decorator will be a
+                // string literal type if the member name is an identifier, number, or string;
+                // otherwise, if the member name is a computed property name it will
+                // be either string or symbol.
+                var element = node;
+                switch (element.name.kind) {
+                    case 71 /* Identifier */:
+                    case 8 /* NumericLiteral */:
+                    case 9 /* StringLiteral */:
+                        return getLiteralType(element.name.text);
+                    case 144 /* ComputedPropertyName */:
+                        var nameType = checkComputedPropertyName(element.name);
+                        if (isTypeOfKind(nameType, 512 /* ESSymbol */)) {
+                            return nameType;
+                        }
+                        else {
+                            return stringType;
+                        }
+                    default:
+                        ts.Debug.fail("Unsupported property name.");
+                        return unknownType;
                 }
             }
-            // In the following errors, the {1} slot is before the {0} slot because checkTypeSubtypeOf supplies the
-            // subtype as the first argument to the error
-            checkTypeSubtypeOf(bestSupertypeDownfallType, bestSupertype, errorLocation, ts.Diagnostics.Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0, errorMessageChainHead);
-        }
-        function isArrayType(type) {
-            return type.flags & 131072 /* Reference */ && type.target === globalArrayType;
-        }
-        function isArrayLikeType(type) {
-            // A type is array-like if it is a reference to the global Array or global ReadonlyArray type,
-            // or if it is not the undefined or null type and if it is assignable to ReadonlyArray<any>
-            return type.flags & 131072 /* Reference */ && (type.target === globalArrayType || type.target === globalReadonlyArrayType) ||
-                !(type.flags & 6144 /* Nullable */) && isTypeAssignableTo(type, anyReadonlyArrayType);
-        }
-        function isTupleLikeType(type) {
-            return !!getPropertyOfType(type, "0");
-        }
-        function isUnitType(type) {
-            return (type.flags & (480 /* Literal */ | 2048 /* Undefined */ | 4096 /* Null */)) !== 0;
-        }
-        function isLiteralType(type) {
-            return type.flags & 8 /* Boolean */ ? true :
-                type.flags & 524288 /* Union */ ? type.flags & 16 /* Enum */ ? true : !ts.forEach(type.types, function (t) { return !isUnitType(t); }) :
-                    isUnitType(type);
-        }
-        function getBaseTypeOfLiteralType(type) {
-            return type.flags & 32 /* StringLiteral */ ? stringType :
-                type.flags & 64 /* NumberLiteral */ ? numberType :
-                    type.flags & 128 /* BooleanLiteral */ ? booleanType :
-                        type.flags & 256 /* EnumLiteral */ ? type.baseType :
-                            type.flags & 524288 /* Union */ && !(type.flags & 16 /* Enum */) ? getUnionType(ts.map(type.types, getBaseTypeOfLiteralType)) :
-                                type;
-        }
-        function getWidenedLiteralType(type) {
-            return type.flags & 32 /* StringLiteral */ && type.flags & 16777216 /* FreshLiteral */ ? stringType :
-                type.flags & 64 /* NumberLiteral */ && type.flags & 16777216 /* FreshLiteral */ ? numberType :
-                    type.flags & 128 /* BooleanLiteral */ ? booleanType :
-                        type.flags & 256 /* EnumLiteral */ ? type.baseType :
-                            type.flags & 524288 /* Union */ && !(type.flags & 16 /* Enum */) ? getUnionType(ts.map(type.types, getWidenedLiteralType)) :
-                                type;
+            ts.Debug.fail("Unsupported decorator target.");
+            return unknownType;
         }
         /**
-         * Check if a Type was written as a tuple type literal.
-         * Prefer using isTupleLikeType() unless the use of `elementTypes` is required.
+         * Returns the effective argument type for the third argument to a decorator.
+         * If 'node' is a parameter, the effective argument type is the number type.
+         * If 'node' is a method or accessor, the effective argument type is a
+         *    `TypedPropertyDescriptor<T>` instantiated with the type of the member.
+         * Class and property decorators do not have a third effective argument.
          */
-        function isTupleType(type) {
-            return !!(type.flags & 131072 /* Reference */ && type.target.flags & 262144 /* Tuple */);
-        }
-        function getFalsyFlagsOfTypes(types) {
-            var result = 0;
-            for (var _i = 0, types_9 = types; _i < types_9.length; _i++) {
-                var t = types_9[_i];
-                result |= getFalsyFlags(t);
+        function getEffectiveDecoratorThirdArgumentType(node) {
+            // The third argument to a decorator is either its `descriptor` for a method decorator
+            // or its `parameterIndex` for a parameter decorator
+            if (node.kind === 229 /* ClassDeclaration */) {
+                ts.Debug.fail("Class decorators should not have a third synthetic argument.");
+                return unknownType;
             }
-            return result;
-        }
-        // Returns the String, Number, Boolean, StringLiteral, NumberLiteral, BooleanLiteral, Void, Undefined, or Null
-        // flags for the string, number, boolean, "", 0, false, void, undefined, or null types respectively. Returns
-        // no flags for all other types (including non-falsy literal types).
-        function getFalsyFlags(type) {
-            return type.flags & 524288 /* Union */ ? getFalsyFlagsOfTypes(type.types) :
-                type.flags & 32 /* StringLiteral */ ? type.text === "" ? 32 /* StringLiteral */ : 0 :
-                    type.flags & 64 /* NumberLiteral */ ? type.text === "0" ? 64 /* NumberLiteral */ : 0 :
-                        type.flags & 128 /* BooleanLiteral */ ? type === falseType ? 128 /* BooleanLiteral */ : 0 :
-                            type.flags & 7406 /* PossiblyFalsy */;
-        }
-        function includeFalsyTypes(type, flags) {
-            if ((getFalsyFlags(type) & flags) === flags) {
-                return type;
+            if (node.kind === 146 /* Parameter */) {
+                // The `parameterIndex` for a parameter decorator is always a number
+                return numberType;
             }
-            var types = [type];
-            if (flags & 34 /* StringLike */)
-                types.push(emptyStringType);
-            if (flags & 340 /* NumberLike */)
-                types.push(zeroType);
-            if (flags & 136 /* BooleanLike */)
-                types.push(falseType);
-            if (flags & 1024 /* Void */)
-                types.push(voidType);
-            if (flags & 2048 /* Undefined */)
-                types.push(undefinedType);
-            if (flags & 4096 /* Null */)
-                types.push(nullType);
-            return getUnionType(types, /*subtypeReduction*/ true);
-        }
-        function removeDefinitelyFalsyTypes(type) {
-            return getFalsyFlags(type) & 7392 /* DefinitelyFalsy */ ?
-                filterType(type, function (t) { return !(getFalsyFlags(t) & 7392 /* DefinitelyFalsy */); }) :
-                type;
-        }
-        function getNonNullableType(type) {
-            return strictNullChecks ? getTypeWithFacts(type, 524288 /* NEUndefinedOrNull */) : type;
+            if (node.kind === 149 /* PropertyDeclaration */) {
+                ts.Debug.fail("Property decorators should not have a third synthetic argument.");
+                return unknownType;
+            }
+            if (node.kind === 151 /* MethodDeclaration */ ||
+                node.kind === 153 /* GetAccessor */ ||
+                node.kind === 154 /* SetAccessor */) {
+                // The `descriptor` for a method decorator will be a `TypedPropertyDescriptor<T>`
+                // for the type of the member.
+                var propertyType = getTypeOfNode(node);
+                return createTypedPropertyDescriptorType(propertyType);
+            }
+            ts.Debug.fail("Unsupported decorator target.");
+            return unknownType;
         }
         /**
-         * Return true if type was inferred from an object literal or written as an object type literal
-         * with no call or construct signatures.
+         * Returns the effective argument type for the provided argument to a decorator.
          */
-        function isObjectLiteralType(type) {
-            return type.symbol && (type.symbol.flags & (4096 /* ObjectLiteral */ | 2048 /* TypeLiteral */)) !== 0 &&
-                getSignaturesOfType(type, 0 /* Call */).length === 0 &&
-                getSignaturesOfType(type, 1 /* Construct */).length === 0;
-        }
-        function createTransientSymbol(source, type) {
-            var symbol = createSymbol(source.flags | 67108864 /* Transient */, source.name);
-            symbol.declarations = source.declarations;
-            symbol.parent = source.parent;
-            symbol.type = type;
-            symbol.target = source;
-            if (source.valueDeclaration) {
-                symbol.valueDeclaration = source.valueDeclaration;
+        function getEffectiveDecoratorArgumentType(node, argIndex) {
+            if (argIndex === 0) {
+                return getEffectiveDecoratorFirstArgumentType(node.parent);
             }
-            return symbol;
-        }
-        function transformTypeOfMembers(type, f) {
-            var members = ts.createMap();
-            for (var _i = 0, _a = getPropertiesOfObjectType(type); _i < _a.length; _i++) {
-                var property = _a[_i];
-                var original = getTypeOfSymbol(property);
-                var updated = f(original);
-                members[property.name] = updated === original ? property : createTransientSymbol(property, updated);
+            else if (argIndex === 1) {
+                return getEffectiveDecoratorSecondArgumentType(node.parent);
             }
-            ;
-            return members;
+            else if (argIndex === 2) {
+                return getEffectiveDecoratorThirdArgumentType(node.parent);
+            }
+            ts.Debug.fail("Decorators should not have a fourth synthetic argument.");
+            return unknownType;
         }
         /**
-         * If the the provided object literal is subject to the excess properties check,
-         * create a new that is exempt. Recursively mark object literal members as exempt.
-         * Leave signatures alone since they are not subject to the check.
+         * Gets the effective argument type for an argument in a call expression.
          */
-        function getRegularTypeOfObjectLiteral(type) {
-            if (!(type.flags & 8388608 /* ObjectLiteral */ && type.flags & 16777216 /* FreshLiteral */)) {
-                return type;
+        function getEffectiveArgumentType(node, argIndex) {
+            // Decorators provide special arguments, a tagged template expression provides
+            // a special first argument, and string literals get string literal types
+            // unless we're reporting errors
+            if (node.kind === 147 /* Decorator */) {
+                return getEffectiveDecoratorArgumentType(node, argIndex);
             }
-            var regularType = type.regularType;
-            if (regularType) {
-                return regularType;
+            else if (argIndex === 0 && node.kind === 183 /* TaggedTemplateExpression */) {
+                return getGlobalTemplateStringsArrayType();
             }
-            var resolved = type;
-            var members = transformTypeOfMembers(type, getRegularTypeOfObjectLiteral);
-            var regularNew = createAnonymousType(resolved.symbol, members, resolved.callSignatures, resolved.constructSignatures, resolved.stringIndexInfo, resolved.numberIndexInfo);
-            regularNew.flags = resolved.flags & ~16777216 /* FreshLiteral */;
-            type.regularType = regularNew;
-            return regularNew;
-        }
-        function getWidenedTypeOfObjectLiteral(type) {
-            var members = transformTypeOfMembers(type, function (prop) {
-                var widened = getWidenedType(prop);
-                return prop === widened ? prop : widened;
-            });
-            var stringIndexInfo = getIndexInfoOfType(type, 0 /* String */);
-            var numberIndexInfo = getIndexInfoOfType(type, 1 /* Number */);
-            return createAnonymousType(type.symbol, members, emptyArray, emptyArray, stringIndexInfo && createIndexInfo(getWidenedType(stringIndexInfo.type), stringIndexInfo.isReadonly), numberIndexInfo && createIndexInfo(getWidenedType(numberIndexInfo.type), numberIndexInfo.isReadonly));
-        }
-        function getWidenedConstituentType(type) {
-            return type.flags & 6144 /* Nullable */ ? type : getWidenedType(type);
+            // This is not a synthetic argument, so we return 'undefined'
+            // to signal that the caller needs to check the argument.
+            return undefined;
         }
-        function getWidenedType(type) {
-            if (type.flags & 100663296 /* RequiresWidening */) {
-                if (type.flags & 6144 /* Nullable */) {
-                    return anyType;
-                }
-                if (type.flags & 8388608 /* ObjectLiteral */) {
-                    return getWidenedTypeOfObjectLiteral(type);
-                }
-                if (type.flags & 524288 /* Union */) {
-                    return getUnionType(ts.map(type.types, getWidenedConstituentType));
-                }
-                if (isArrayType(type) || isTupleType(type)) {
-                    return createTypeReference(type.target, ts.map(type.typeArguments, getWidenedType));
-                }
+        /**
+         * Gets the effective argument expression for an argument in a call expression.
+         */
+        function getEffectiveArgument(node, args, argIndex) {
+            // For a decorator or the first argument of a tagged template expression we return undefined.
+            if (node.kind === 147 /* Decorator */ ||
+                (argIndex === 0 && node.kind === 183 /* TaggedTemplateExpression */)) {
+                return undefined;
             }
-            return type;
+            return args[argIndex];
         }
         /**
-         * Reports implicit any errors that occur as a result of widening 'null' and 'undefined'
-         * to 'any'. A call to reportWideningErrorsInType is normally accompanied by a call to
-         * getWidenedType. But in some cases getWidenedType is called without reporting errors
-         * (type argument inference is an example).
-         *
-         * The return value indicates whether an error was in fact reported. The particular circumstances
-         * are on a best effort basis. Currently, if the null or undefined that causes widening is inside
-         * an object literal property (arbitrarily deeply), this function reports an error. If no error is
-         * reported, reportImplicitAnyError is a suitable fallback to report a general error.
+         * Gets the error node to use when reporting errors for an effective argument.
          */
-        function reportWideningErrorsInType(type) {
-            var errorReported = false;
-            if (type.flags & 524288 /* Union */) {
-                for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                    var t = _a[_i];
-                    if (reportWideningErrorsInType(t)) {
-                        errorReported = true;
-                    }
-                }
-            }
-            if (isArrayType(type) || isTupleType(type)) {
-                for (var _b = 0, _c = type.typeArguments; _b < _c.length; _b++) {
-                    var t = _c[_b];
-                    if (reportWideningErrorsInType(t)) {
-                        errorReported = true;
-                    }
-                }
+        function getEffectiveArgumentErrorNode(node, argIndex, arg) {
+            if (node.kind === 147 /* Decorator */) {
+                // For a decorator, we use the expression of the decorator for error reporting.
+                return node.expression;
             }
-            if (type.flags & 8388608 /* ObjectLiteral */) {
-                for (var _d = 0, _e = getPropertiesOfObjectType(type); _d < _e.length; _d++) {
-                    var p = _e[_d];
-                    var t = getTypeOfSymbol(p);
-                    if (t.flags & 33554432 /* ContainsWideningType */) {
-                        if (!reportWideningErrorsInType(t)) {
-                            error(p.valueDeclaration, ts.Diagnostics.Object_literal_s_property_0_implicitly_has_an_1_type, p.name, typeToString(getWidenedType(t)));
-                        }
-                        errorReported = true;
-                    }
-                }
+            else if (argIndex === 0 && node.kind === 183 /* TaggedTemplateExpression */) {
+                // For a the first argument of a tagged template expression, we use the template of the tag for error reporting.
+                return node.template;
             }
-            return errorReported;
-        }
-        function reportImplicitAnyError(declaration, type) {
-            var typeAsString = typeToString(getWidenedType(type));
-            var diagnostic;
-            switch (declaration.kind) {
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
-                    diagnostic = ts.Diagnostics.Member_0_implicitly_has_an_1_type;
-                    break;
-                case 142 /* Parameter */:
-                    diagnostic = declaration.dotDotDotToken ?
-                        ts.Diagnostics.Rest_parameter_0_implicitly_has_an_any_type :
-                        ts.Diagnostics.Parameter_0_implicitly_has_an_1_type;
-                    break;
-                case 169 /* BindingElement */:
-                    diagnostic = ts.Diagnostics.Binding_element_0_implicitly_has_an_1_type;
-                    break;
-                case 220 /* FunctionDeclaration */:
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                case 179 /* FunctionExpression */:
-                case 180 /* ArrowFunction */:
-                    if (!declaration.name) {
-                        error(declaration, ts.Diagnostics.Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type, typeAsString);
-                        return;
-                    }
-                    diagnostic = ts.Diagnostics._0_which_lacks_return_type_annotation_implicitly_has_an_1_return_type;
-                    break;
-                default:
-                    diagnostic = ts.Diagnostics.Variable_0_implicitly_has_an_1_type;
+            else {
+                return arg;
             }
-            error(declaration, diagnostic, ts.declarationNameToString(declaration.name), typeAsString);
         }
-        function reportErrorsFromWidening(declaration, type) {
-            if (produceDiagnostics && compilerOptions.noImplicitAny && type.flags & 33554432 /* ContainsWideningType */) {
-                // Report implicit any error within type if possible, otherwise report error on declaration
-                if (!reportWideningErrorsInType(type)) {
-                    reportImplicitAnyError(declaration, type);
+        function resolveCall(node, signatures, candidatesOutArray, fallbackError) {
+            var isTaggedTemplate = node.kind === 183 /* TaggedTemplateExpression */;
+            var isDecorator = node.kind === 147 /* Decorator */;
+            var isJsxOpeningOrSelfClosingElement = ts.isJsxOpeningLikeElement(node);
+            var typeArguments;
+            if (!isTaggedTemplate && !isDecorator && !isJsxOpeningOrSelfClosingElement) {
+                typeArguments = node.typeArguments;
+                // We already perform checking on the type arguments on the class declaration itself.
+                if (node.expression.kind !== 97 /* SuperKeyword */) {
+                    ts.forEach(typeArguments, checkSourceElement);
                 }
             }
-        }
-        function forEachMatchingParameterType(source, target, callback) {
-            var sourceMax = source.parameters.length;
-            var targetMax = target.parameters.length;
-            var count;
-            if (source.hasRestParameter && target.hasRestParameter) {
-                count = Math.max(sourceMax, targetMax);
-            }
-            else if (source.hasRestParameter) {
-                count = targetMax;
+            var candidates = candidatesOutArray || [];
+            // reorderCandidates fills up the candidates array directly
+            reorderCandidates(signatures, candidates);
+            if (!candidates.length) {
+                diagnostics.add(ts.createDiagnosticForNode(node, ts.Diagnostics.Call_target_does_not_contain_any_signatures));
+                return resolveErrorCall(node);
             }
-            else if (target.hasRestParameter) {
-                count = sourceMax;
+            var args = getEffectiveCallArguments(node);
+            // The following applies to any value of 'excludeArgument[i]':
+            //    - true:      the argument at 'i' is susceptible to a one-time permanent contextual typing.
+            //    - undefined: the argument at 'i' is *not* susceptible to permanent contextual typing.
+            //    - false:     the argument at 'i' *was* and *has been* permanently contextually typed.
+            //
+            // The idea is that we will perform type argument inference & assignability checking once
+            // without using the susceptible parameters that are functions, and once more for each of those
+            // parameters, contextually typing each as we go along.
+            //
+            // For a tagged template, then the first argument be 'undefined' if necessary
+            // because it represents a TemplateStringsArray.
+            //
+            // For a decorator, no arguments are susceptible to contextual typing due to the fact
+            // decorators are applied to a declaration by the emitter, and not to an expression.
+            var excludeArgument;
+            if (!isDecorator) {
+                // We do not need to call `getEffectiveArgumentCount` here as it only
+                // applies when calculating the number of arguments for a decorator.
+                for (var i = isTaggedTemplate ? 1 : 0; i < args.length; i++) {
+                    if (isContextSensitive(args[i])) {
+                        if (!excludeArgument) {
+                            excludeArgument = new Array(args.length);
+                        }
+                        excludeArgument[i] = true;
+                    }
+                }
             }
-            else {
-                count = Math.min(sourceMax, targetMax);
+            // The following variables are captured and modified by calls to chooseOverload.
+            // If overload resolution or type argument inference fails, we want to report the
+            // best error possible. The best error is one which says that an argument was not
+            // assignable to a parameter. This implies that everything else about the overload
+            // was fine. So if there is any overload that is only incorrect because of an
+            // argument, we will report an error on that one.
+            //
+            //     function foo(s: string): void;
+            //     function foo(n: number): void; // Report argument error on this overload
+            //     function foo(): void;
+            //     foo(true);
+            //
+            // If none of the overloads even made it that far, there are two possibilities.
+            // There was a problem with type arguments for some overload, in which case
+            // report an error on that. Or none of the overloads even had correct arity,
+            // in which case give an arity error.
+            //
+            //     function foo<T extends string>(x: T): void; // Report type argument error
+            //     function foo(): void;
+            //     foo<number>(0);
+            //
+            var candidateForArgumentError;
+            var candidateForTypeArgumentError;
+            var result;
+            // If we are in signature help, a trailing comma indicates that we intend to provide another argument,
+            // so we will only accept overloads with arity at least 1 higher than the current number of provided arguments.
+            var signatureHelpTrailingComma = candidatesOutArray && node.kind === 181 /* CallExpression */ && node.arguments.hasTrailingComma;
+            // Section 4.12.1:
+            // if the candidate list contains one or more signatures for which the type of each argument
+            // expression is a subtype of each corresponding parameter type, the return type of the first
+            // of those signatures becomes the return type of the function call.
+            // Otherwise, the return type of the first signature in the candidate list becomes the return
+            // type of the function call.
+            //
+            // Whether the call is an error is determined by assignability of the arguments. The subtype pass
+            // is just important for choosing the best signature. So in the case where there is only one
+            // signature, the subtype pass is useless. So skipping it is an optimization.
+            if (candidates.length > 1) {
+                result = chooseOverload(candidates, subtypeRelation, signatureHelpTrailingComma);
             }
-            for (var i = 0; i < count; i++) {
-                callback(getTypeAtPosition(source, i), getTypeAtPosition(target, i));
+            if (!result) {
+                result = chooseOverload(candidates, assignableRelation, signatureHelpTrailingComma);
             }
-        }
-        function createInferenceContext(signature, inferUnionTypes) {
-            var inferences = ts.map(signature.typeParameters, createTypeInferencesObject);
-            return {
-                signature: signature,
-                inferUnionTypes: inferUnionTypes,
-                inferences: inferences,
-                inferredTypes: new Array(signature.typeParameters.length),
-            };
-        }
-        function createTypeInferencesObject() {
-            return {
-                primary: undefined,
-                secondary: undefined,
-                topLevel: true,
-                isFixed: false,
-            };
-        }
-        // Return true if the given type could possibly reference a type parameter for which
-        // we perform type inference (i.e. a type parameter of a generic function). We cache
-        // results for union and intersection types for performance reasons.
-        function couldContainTypeParameters(type) {
-            return !!(type.flags & 16384 /* TypeParameter */ ||
-                type.flags & 131072 /* Reference */ && ts.forEach(type.typeArguments, couldContainTypeParameters) ||
-                type.flags & 2097152 /* Anonymous */ && type.symbol && type.symbol.flags & (8192 /* Method */ | 2048 /* TypeLiteral */ | 32 /* Class */) ||
-                type.flags & 1572864 /* UnionOrIntersection */ && couldUnionOrIntersectionContainTypeParameters(type));
-        }
-        function couldUnionOrIntersectionContainTypeParameters(type) {
-            if (type.couldContainTypeParameters === undefined) {
-                type.couldContainTypeParameters = ts.forEach(type.types, couldContainTypeParameters);
+            if (result) {
+                return result;
             }
-            return type.couldContainTypeParameters;
-        }
-        function isTypeParameterAtTopLevel(type, typeParameter) {
-            return type === typeParameter || type.flags & 1572864 /* UnionOrIntersection */ && ts.forEach(type.types, function (t) { return isTypeParameterAtTopLevel(t, typeParameter); });
-        }
-        function inferTypes(context, originalSource, originalTarget) {
-            var typeParameters = context.signature.typeParameters;
-            var sourceStack;
-            var targetStack;
-            var depth = 0;
-            var inferiority = 0;
-            var visited = ts.createMap();
-            inferFromTypes(originalSource, originalTarget);
-            function isInProcess(source, target) {
-                for (var i = 0; i < depth; i++) {
-                    if (source === sourceStack[i] && target === targetStack[i]) {
-                        return true;
-                    }
+            // No signatures were applicable. Now report errors based on the last applicable signature with
+            // no arguments excluded from assignability checks.
+            // If candidate is undefined, it means that no candidates had a suitable arity. In that case,
+            // skip the checkApplicableSignature check.
+            if (candidateForArgumentError) {
+                if (isJsxOpeningOrSelfClosingElement) {
+                    // We do not report any error here because any error will be handled in "resolveCustomJsxElementAttributesType".
+                    return candidateForArgumentError;
                 }
-                return false;
+                // excludeArgument is undefined, in this case also equivalent to [undefined, undefined, ...]
+                // The importance of excludeArgument is to prevent us from typing function expression parameters
+                // in arguments too early. If possible, we'd like to only type them once we know the correct
+                // overload. However, this matters for the case where the call is correct. When the call is
+                // an error, we don't need to exclude any arguments, although it would cause no harm to do so.
+                checkApplicableSignature(node, args, candidateForArgumentError, assignableRelation, /*excludeArgument*/ undefined, /*reportErrors*/ true);
             }
-            function inferFromTypes(source, target) {
-                if (!couldContainTypeParameters(target)) {
-                    return;
-                }
-                if (source.flags & 524288 /* Union */ && target.flags & 524288 /* Union */ && !(source.flags & 16 /* Enum */ && target.flags & 16 /* Enum */) ||
-                    source.flags & 1048576 /* Intersection */ && target.flags & 1048576 /* Intersection */) {
-                    // Source and target are both unions or both intersections. If source and target
-                    // are the same type, just relate each constituent type to itself.
-                    if (source === target) {
-                        for (var _i = 0, _a = source.types; _i < _a.length; _i++) {
-                            var t = _a[_i];
-                            inferFromTypes(t, t);
-                        }
-                        return;
-                    }
-                    // Find each source constituent type that has an identically matching target constituent
-                    // type, and for each such type infer from the type to itself. When inferring from a
-                    // type to itself we effectively find all type parameter occurrences within that type
-                    // and infer themselves as their type arguments. We have special handling for numeric
-                    // and string literals because the number and string types are not represented as unions
-                    // of all their possible values.
-                    var matchingTypes = void 0;
-                    for (var _b = 0, _c = source.types; _b < _c.length; _b++) {
-                        var t = _c[_b];
-                        if (typeIdenticalToSomeType(t, target.types)) {
-                            (matchingTypes || (matchingTypes = [])).push(t);
-                            inferFromTypes(t, t);
-                        }
-                        else if (t.flags & (64 /* NumberLiteral */ | 32 /* StringLiteral */)) {
-                            var b = getBaseTypeOfLiteralType(t);
-                            if (typeIdenticalToSomeType(b, target.types)) {
-                                (matchingTypes || (matchingTypes = [])).push(t, b);
-                            }
+            else if (candidateForTypeArgumentError) {
+                var typeArguments_1 = node.typeArguments;
+                checkTypeArguments(candidateForTypeArgumentError, typeArguments_1, ts.map(typeArguments_1, getTypeFromTypeNode), /*reportErrors*/ true, fallbackError);
+            }
+            else if (typeArguments && ts.every(signatures, function (sig) { return ts.length(sig.typeParameters) !== typeArguments.length; })) {
+                var min = Number.POSITIVE_INFINITY;
+                var max = Number.NEGATIVE_INFINITY;
+                for (var _i = 0, signatures_5 = signatures; _i < signatures_5.length; _i++) {
+                    var sig = signatures_5[_i];
+                    min = Math.min(min, getMinTypeArgumentCount(sig.typeParameters));
+                    max = Math.max(max, ts.length(sig.typeParameters));
+                }
+                var paramCount = min < max ? min + "-" + max : min;
+                diagnostics.add(ts.createDiagnosticForNode(node, ts.Diagnostics.Expected_0_type_arguments_but_got_1, paramCount, typeArguments.length));
+            }
+            else if (args) {
+                var min = Number.POSITIVE_INFINITY;
+                var max = Number.NEGATIVE_INFINITY;
+                for (var _a = 0, signatures_6 = signatures; _a < signatures_6.length; _a++) {
+                    var sig = signatures_6[_a];
+                    min = Math.min(min, sig.minArgumentCount);
+                    max = Math.max(max, sig.parameters.length);
+                }
+                var hasRestParameter_1 = ts.some(signatures, function (sig) { return sig.hasRestParameter; });
+                var hasSpreadArgument = getSpreadArgumentIndex(args) > -1;
+                var paramCount = hasRestParameter_1 ? min :
+                    min < max ? min + "-" + max :
+                        min;
+                var argCount = args.length - (hasSpreadArgument ? 1 : 0);
+                var error_1 = hasRestParameter_1 && hasSpreadArgument ? ts.Diagnostics.Expected_at_least_0_arguments_but_got_a_minimum_of_1 :
+                    hasRestParameter_1 ? ts.Diagnostics.Expected_at_least_0_arguments_but_got_1 :
+                        hasSpreadArgument ? ts.Diagnostics.Expected_0_arguments_but_got_a_minimum_of_1 :
+                            ts.Diagnostics.Expected_0_arguments_but_got_1;
+                diagnostics.add(ts.createDiagnosticForNode(node, error_1, paramCount, argCount));
+            }
+            else if (fallbackError) {
+                diagnostics.add(ts.createDiagnosticForNode(node, fallbackError));
+            }
+            // No signature was applicable. We have already reported the errors for the invalid signature.
+            // If this is a type resolution session, e.g. Language Service, try to get better information that anySignature.
+            // Pick the first candidate that matches the arity. This way we can get a contextual type for cases like:
+            //  declare function f(a: { xa: number; xb: number; });
+            //  f({ |
+            if (!produceDiagnostics) {
+                for (var _b = 0, candidates_1 = candidates; _b < candidates_1.length; _b++) {
+                    var candidate = candidates_1[_b];
+                    if (hasCorrectArity(node, args, candidate)) {
+                        if (candidate.typeParameters && typeArguments) {
+                            candidate = getSignatureInstantiation(candidate, ts.map(typeArguments, getTypeFromTypeNode));
                         }
-                    }
-                    // Next, to improve the quality of inferences, reduce the source and target types by
-                    // removing the identically matched constituents. For example, when inferring from
-                    // 'string | string[]' to 'string | T' we reduce the types to 'string[]' and 'T'.
-                    if (matchingTypes) {
-                        source = removeTypesFromUnionOrIntersection(source, matchingTypes);
-                        target = removeTypesFromUnionOrIntersection(target, matchingTypes);
+                        return candidate;
                     }
                 }
-                if (target.flags & 16384 /* TypeParameter */) {
-                    // If target is a type parameter, make an inference, unless the source type contains
-                    // the anyFunctionType (the wildcard type that's used to avoid contextually typing functions).
-                    // Because the anyFunctionType is internal, it should not be exposed to the user by adding
-                    // it as an inference candidate. Hopefully, a better candidate will come along that does
-                    // not contain anyFunctionType when we come back to this argument for its second round
-                    // of inference.
-                    if (source.flags & 134217728 /* ContainsAnyFunctionType */) {
-                        return;
+            }
+            return resolveErrorCall(node);
+            function chooseOverload(candidates, relation, signatureHelpTrailingComma) {
+                if (signatureHelpTrailingComma === void 0) { signatureHelpTrailingComma = false; }
+                candidateForArgumentError = undefined;
+                candidateForTypeArgumentError = undefined;
+                for (var _i = 0, candidates_2 = candidates; _i < candidates_2.length; _i++) {
+                    var originalCandidate = candidates_2[_i];
+                    if (!hasCorrectArity(node, args, originalCandidate, signatureHelpTrailingComma)) {
+                        continue;
                     }
-                    for (var i = 0; i < typeParameters.length; i++) {
-                        if (target === typeParameters[i]) {
-                            var inferences = context.inferences[i];
-                            if (!inferences.isFixed) {
-                                // Any inferences that are made to a type parameter in a union type are inferior
-                                // to inferences made to a flat (non-union) type. This is because if we infer to
-                                // T | string[], we really don't know if we should be inferring to T or not (because
-                                // the correct constituent on the target side could be string[]). Therefore, we put
-                                // such inferior inferences into a secondary bucket, and only use them if the primary
-                                // bucket is empty.
-                                var candidates = inferiority ?
-                                    inferences.secondary || (inferences.secondary = []) :
-                                    inferences.primary || (inferences.primary = []);
-                                if (!ts.contains(candidates, source)) {
-                                    candidates.push(source);
-                                }
-                                if (!isTypeParameterAtTopLevel(originalTarget, target)) {
-                                    inferences.topLevel = false;
+                    var candidate = void 0;
+                    var inferenceContext = originalCandidate.typeParameters ?
+                        createInferenceContext(originalCandidate, /*flags*/ ts.isInJavaScriptFile(node) ? 4 /* AnyDefault */ : 0) :
+                        undefined;
+                    while (true) {
+                        candidate = originalCandidate;
+                        if (candidate.typeParameters) {
+                            var typeArgumentTypes = void 0;
+                            if (typeArguments) {
+                                typeArgumentTypes = fillMissingTypeArguments(ts.map(typeArguments, getTypeFromTypeNode), candidate.typeParameters, getMinTypeArgumentCount(candidate.typeParameters));
+                                if (!checkTypeArguments(candidate, typeArguments, typeArgumentTypes, /*reportErrors*/ false)) {
+                                    candidateForTypeArgumentError = originalCandidate;
+                                    break;
                                 }
                             }
-                            return;
-                        }
-                    }
-                }
-                else if (source.flags & 131072 /* Reference */ && target.flags & 131072 /* Reference */ && source.target === target.target) {
-                    // If source and target are references to the same generic type, infer from type arguments
-                    var sourceTypes = source.typeArguments || emptyArray;
-                    var targetTypes = target.typeArguments || emptyArray;
-                    var count = sourceTypes.length < targetTypes.length ? sourceTypes.length : targetTypes.length;
-                    for (var i = 0; i < count; i++) {
-                        inferFromTypes(sourceTypes[i], targetTypes[i]);
-                    }
-                }
-                else if (target.flags & 1572864 /* UnionOrIntersection */) {
-                    var targetTypes = target.types;
-                    var typeParameterCount = 0;
-                    var typeParameter = void 0;
-                    // First infer to each type in union or intersection that isn't a type parameter
-                    for (var _d = 0, targetTypes_2 = targetTypes; _d < targetTypes_2.length; _d++) {
-                        var t = targetTypes_2[_d];
-                        if (t.flags & 16384 /* TypeParameter */ && ts.contains(typeParameters, t)) {
-                            typeParameter = t;
-                            typeParameterCount++;
-                        }
-                        else {
-                            inferFromTypes(source, t);
-                        }
-                    }
-                    // Next, if target containings a single naked type parameter, make a secondary inference to that type
-                    // parameter. This gives meaningful results for union types in co-variant positions and intersection
-                    // types in contra-variant positions (such as callback parameters).
-                    if (typeParameterCount === 1) {
-                        inferiority++;
-                        inferFromTypes(source, typeParameter);
-                        inferiority--;
-                    }
-                }
-                else if (source.flags & 1572864 /* UnionOrIntersection */) {
-                    // Source is a union or intersection type, infer from each constituent type
-                    var sourceTypes = source.types;
-                    for (var _e = 0, sourceTypes_3 = sourceTypes; _e < sourceTypes_3.length; _e++) {
-                        var sourceType = sourceTypes_3[_e];
-                        inferFromTypes(sourceType, target);
-                    }
-                }
-                else {
-                    source = getApparentType(source);
-                    if (source.flags & 2588672 /* ObjectType */) {
-                        if (isInProcess(source, target)) {
-                            return;
-                        }
-                        if (isDeeplyNestedGeneric(source, sourceStack, depth) && isDeeplyNestedGeneric(target, targetStack, depth)) {
-                            return;
+                            else {
+                                typeArgumentTypes = inferTypeArguments(node, candidate, args, excludeArgument, inferenceContext);
+                            }
+                            candidate = getSignatureInstantiation(candidate, typeArgumentTypes);
                         }
-                        var key = source.id + "," + target.id;
-                        if (visited[key]) {
-                            return;
+                        if (!checkApplicableSignature(node, args, candidate, relation, excludeArgument, /*reportErrors*/ false)) {
+                            candidateForArgumentError = candidate;
+                            break;
                         }
-                        visited[key] = true;
-                        if (depth === 0) {
-                            sourceStack = [];
-                            targetStack = [];
+                        var index = excludeArgument ? ts.indexOf(excludeArgument, /*value*/ true) : -1;
+                        if (index < 0) {
+                            return candidate;
                         }
-                        sourceStack[depth] = source;
-                        targetStack[depth] = target;
-                        depth++;
-                        inferFromProperties(source, target);
-                        inferFromSignatures(source, target, 0 /* Call */);
-                        inferFromSignatures(source, target, 1 /* Construct */);
-                        inferFromIndexTypes(source, target);
-                        depth--;
+                        excludeArgument[index] = false;
                     }
                 }
+                return undefined;
             }
-            function inferFromProperties(source, target) {
-                var properties = getPropertiesOfObjectType(target);
-                for (var _i = 0, properties_3 = properties; _i < properties_3.length; _i++) {
-                    var targetProp = properties_3[_i];
-                    var sourceProp = getPropertyOfObjectType(source, targetProp.name);
-                    if (sourceProp) {
-                        inferFromTypes(getTypeOfSymbol(sourceProp), getTypeOfSymbol(targetProp));
+        }
+        function resolveCallExpression(node, candidatesOutArray) {
+            if (node.expression.kind === 97 /* SuperKeyword */) {
+                var superType = checkSuperExpression(node.expression);
+                if (superType !== unknownType) {
+                    // In super call, the candidate signatures are the matching arity signatures of the base constructor function instantiated
+                    // with the type arguments specified in the extends clause.
+                    var baseTypeNode = ts.getClassExtendsHeritageClauseElement(ts.getContainingClass(node));
+                    if (baseTypeNode) {
+                        var baseConstructors = getInstantiatedConstructorsForTypeArguments(superType, baseTypeNode.typeArguments, baseTypeNode);
+                        return resolveCall(node, baseConstructors, candidatesOutArray);
                     }
                 }
+                return resolveUntypedCall(node);
             }
-            function inferFromSignatures(source, target, kind) {
-                var sourceSignatures = getSignaturesOfType(source, kind);
-                var targetSignatures = getSignaturesOfType(target, kind);
-                var sourceLen = sourceSignatures.length;
-                var targetLen = targetSignatures.length;
-                var len = sourceLen < targetLen ? sourceLen : targetLen;
-                for (var i = 0; i < len; i++) {
-                    inferFromSignature(getErasedSignature(sourceSignatures[sourceLen - len + i]), getErasedSignature(targetSignatures[targetLen - len + i]));
-                }
+            var funcType = checkNonNullExpression(node.expression);
+            if (funcType === silentNeverType) {
+                return silentNeverSignature;
             }
-            function inferFromParameterTypes(source, target) {
-                return inferFromTypes(source, target);
+            var apparentType = getApparentType(funcType);
+            if (apparentType === unknownType) {
+                // Another error has already been reported
+                return resolveErrorCall(node);
             }
-            function inferFromSignature(source, target) {
-                forEachMatchingParameterType(source, target, inferFromParameterTypes);
-                if (source.typePredicate && target.typePredicate && source.typePredicate.kind === target.typePredicate.kind) {
-                    inferFromTypes(source.typePredicate.type, target.typePredicate.type);
-                }
-                else {
-                    inferFromTypes(getReturnTypeOfSignature(source), getReturnTypeOfSignature(target));
+            // Technically, this signatures list may be incomplete. We are taking the apparent type,
+            // but we are not including call signatures that may have been added to the Object or
+            // Function interface, since they have none by default. This is a bit of a leap of faith
+            // that the user will not add any.
+            var callSignatures = getSignaturesOfType(apparentType, 0 /* Call */);
+            var constructSignatures = getSignaturesOfType(apparentType, 1 /* Construct */);
+            // TS 1.0 Spec: 4.12
+            // In an untyped function call no TypeArgs are permitted, Args can be any argument list, no contextual
+            // types are provided for the argument expressions, and the result is always of type Any.
+            if (isUntypedFunctionCall(funcType, apparentType, callSignatures.length, constructSignatures.length)) {
+                // The unknownType indicates that an error already occurred (and was reported).  No
+                // need to report another error in this case.
+                if (funcType !== unknownType && node.typeArguments) {
+                    error(node, ts.Diagnostics.Untyped_function_calls_may_not_accept_type_arguments);
                 }
+                return resolveUntypedCall(node);
             }
-            function inferFromIndexTypes(source, target) {
-                var targetStringIndexType = getIndexTypeOfType(target, 0 /* String */);
-                if (targetStringIndexType) {
-                    var sourceIndexType = getIndexTypeOfType(source, 0 /* String */) ||
-                        getImplicitIndexTypeOfType(source, 0 /* String */);
-                    if (sourceIndexType) {
-                        inferFromTypes(sourceIndexType, targetStringIndexType);
-                    }
-                }
-                var targetNumberIndexType = getIndexTypeOfType(target, 1 /* Number */);
-                if (targetNumberIndexType) {
-                    var sourceIndexType = getIndexTypeOfType(source, 1 /* Number */) ||
-                        getIndexTypeOfType(source, 0 /* String */) ||
-                        getImplicitIndexTypeOfType(source, 1 /* Number */);
-                    if (sourceIndexType) {
-                        inferFromTypes(sourceIndexType, targetNumberIndexType);
-                    }
+            // If FuncExpr's apparent type(section 3.8.1) is a function type, the call is a typed function call.
+            // TypeScript employs overload resolution in typed function calls in order to support functions
+            // with multiple call signatures.
+            if (!callSignatures.length) {
+                if (constructSignatures.length) {
+                    error(node, ts.Diagnostics.Value_of_type_0_is_not_callable_Did_you_mean_to_include_new, typeToString(funcType));
                 }
-            }
-        }
-        function typeIdenticalToSomeType(type, types) {
-            for (var _i = 0, types_10 = types; _i < types_10.length; _i++) {
-                var t = types_10[_i];
-                if (isTypeIdenticalTo(t, type)) {
-                    return true;
+                else {
+                    error(node, ts.Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures, typeToString(apparentType));
                 }
+                return resolveErrorCall(node);
             }
-            return false;
+            return resolveCall(node, callSignatures, candidatesOutArray);
         }
         /**
-         * Return a new union or intersection type computed by removing a given set of types
-         * from a given union or intersection type.
+         * TS 1.0 spec: 4.12
+         * If FuncExpr is of type Any, or of an object type that has no call or construct signatures
+         * but is a subtype of the Function interface, the call is an untyped function call.
          */
-        function removeTypesFromUnionOrIntersection(type, typesToRemove) {
-            var reducedTypes = [];
-            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                var t = _a[_i];
-                if (!typeIdenticalToSomeType(t, typesToRemove)) {
-                    reducedTypes.push(t);
-                }
-            }
-            return type.flags & 524288 /* Union */ ? getUnionType(reducedTypes) : getIntersectionType(reducedTypes);
-        }
-        function getInferenceCandidates(context, index) {
-            var inferences = context.inferences[index];
-            return inferences.primary || inferences.secondary || emptyArray;
-        }
-        function hasPrimitiveConstraint(type) {
-            var constraint = getConstraintOfTypeParameter(type);
-            return constraint && maybeTypeOfKind(constraint, 8190 /* Primitive */);
-        }
-        function getInferredType(context, index) {
-            var inferredType = context.inferredTypes[index];
-            var inferenceSucceeded;
-            if (!inferredType) {
-                var inferences = getInferenceCandidates(context, index);
-                if (inferences.length) {
-                    // We widen inferred literal types if
-                    // all inferences were made to top-level ocurrences of the type parameter, and
-                    // the type parameter has no constraint or its constraint includes no primitive or literal types, and
-                    // the type parameter was fixed during inference or does not occur at top-level in the return type.
-                    var signature = context.signature;
-                    var widenLiteralTypes = context.inferences[index].topLevel &&
-                        !hasPrimitiveConstraint(signature.typeParameters[index]) &&
-                        (context.inferences[index].isFixed || !isTypeParameterAtTopLevel(getReturnTypeOfSignature(signature), signature.typeParameters[index]));
-                    var baseInferences = widenLiteralTypes ? ts.map(inferences, getWidenedLiteralType) : inferences;
-                    // Infer widened union or supertype, or the unknown type for no common supertype
-                    var unionOrSuperType = context.inferUnionTypes ? getUnionType(baseInferences, /*subtypeReduction*/ true) : getCommonSupertype(baseInferences);
-                    inferredType = unionOrSuperType ? getWidenedType(unionOrSuperType) : unknownType;
-                    inferenceSucceeded = !!unionOrSuperType;
-                }
-                else {
-                    // Infer the empty object type when no inferences were made. It is important to remember that
-                    // in this case, inference still succeeds, meaning there is no error for not having inference
-                    // candidates. An inference error only occurs when there are *conflicting* candidates, i.e.
-                    // candidates with no common supertype.
-                    inferredType = emptyObjectType;
-                    inferenceSucceeded = true;
-                }
-                context.inferredTypes[index] = inferredType;
-                // Only do the constraint check if inference succeeded (to prevent cascading errors)
-                if (inferenceSucceeded) {
-                    var constraint = getConstraintOfTypeParameter(context.signature.typeParameters[index]);
-                    if (constraint) {
-                        var instantiatedConstraint = instantiateType(constraint, getInferenceMapper(context));
-                        if (!isTypeAssignableTo(inferredType, getTypeWithThisArgument(instantiatedConstraint, inferredType))) {
-                            context.inferredTypes[index] = inferredType = instantiatedConstraint;
-                        }
-                    }
-                }
-                else if (context.failedTypeParameterIndex === undefined || context.failedTypeParameterIndex > index) {
-                    // If inference failed, it is necessary to record the index of the failed type parameter (the one we are on).
-                    // It might be that inference has already failed on a later type parameter on a previous call to inferTypeArguments.
-                    // So if this failure is on preceding type parameter, this type parameter is the new failure index.
-                    context.failedTypeParameterIndex = index;
-                }
-            }
-            return inferredType;
-        }
-        function getInferredTypes(context) {
-            for (var i = 0; i < context.inferredTypes.length; i++) {
-                getInferredType(context, i);
+        function isUntypedFunctionCall(funcType, apparentFuncType, numCallSignatures, numConstructSignatures) {
+            if (isTypeAny(funcType)) {
+                return true;
             }
-            return context.inferredTypes;
-        }
-        // EXPRESSION TYPE CHECKING
-        function getResolvedSymbol(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedSymbol) {
-                links.resolvedSymbol = !ts.nodeIsMissing(node) && resolveName(node, node.text, 107455 /* Value */ | 1048576 /* ExportValue */, ts.Diagnostics.Cannot_find_name_0, node) || unknownSymbol;
+            if (isTypeAny(apparentFuncType) && funcType.flags & 16384 /* TypeParameter */) {
+                return true;
             }
-            return links.resolvedSymbol;
-        }
-        function isInTypeQuery(node) {
-            // TypeScript 1.0 spec (April 2014): 3.6.3
-            // A type query consists of the keyword typeof followed by an expression.
-            // The expression is restricted to a single identifier or a sequence of identifiers separated by periods
-            while (node) {
-                switch (node.kind) {
-                    case 158 /* TypeQuery */:
-                        return true;
-                    case 69 /* Identifier */:
-                    case 139 /* QualifiedName */:
-                        node = node.parent;
-                        continue;
-                    default:
-                        return false;
+            if (!numCallSignatures && !numConstructSignatures) {
+                // We exclude union types because we may have a union of function types that happen to have
+                // no common signatures.
+                if (funcType.flags & 65536 /* Union */) {
+                    return false;
                 }
-            }
-            ts.Debug.fail("should not get here");
-        }
-        // Return the flow cache key for a "dotted name" (i.e. a sequence of identifiers
-        // separated by dots). The key consists of the id of the symbol referenced by the
-        // leftmost identifier followed by zero or more property names separated by dots.
-        // The result is undefined if the reference isn't a dotted name.
-        function getFlowCacheKey(node) {
-            if (node.kind === 69 /* Identifier */) {
-                var symbol = getResolvedSymbol(node);
-                return symbol !== unknownSymbol ? "" + getSymbolId(symbol) : undefined;
-            }
-            if (node.kind === 97 /* ThisKeyword */) {
-                return "0";
-            }
-            if (node.kind === 172 /* PropertyAccessExpression */) {
-                var key = getFlowCacheKey(node.expression);
-                return key && key + "." + node.name.text;
-            }
-            return undefined;
-        }
-        function getLeftmostIdentifierOrThis(node) {
-            switch (node.kind) {
-                case 69 /* Identifier */:
-                case 97 /* ThisKeyword */:
-                    return node;
-                case 172 /* PropertyAccessExpression */:
-                    return getLeftmostIdentifierOrThis(node.expression);
-            }
-            return undefined;
-        }
-        function isMatchingReference(source, target) {
-            switch (source.kind) {
-                case 69 /* Identifier */:
-                    return target.kind === 69 /* Identifier */ && getResolvedSymbol(source) === getResolvedSymbol(target) ||
-                        (target.kind === 218 /* VariableDeclaration */ || target.kind === 169 /* BindingElement */) &&
-                            getExportSymbolOfValueSymbolIfExported(getResolvedSymbol(source)) === getSymbolOfNode(target);
-                case 97 /* ThisKeyword */:
-                    return target.kind === 97 /* ThisKeyword */;
-                case 172 /* PropertyAccessExpression */:
-                    return target.kind === 172 /* PropertyAccessExpression */ &&
-                        source.name.text === target.name.text &&
-                        isMatchingReference(source.expression, target.expression);
+                return isTypeAssignableTo(funcType, globalFunctionType);
             }
             return false;
         }
-        function containsMatchingReference(source, target) {
-            while (source.kind === 172 /* PropertyAccessExpression */) {
-                source = source.expression;
-                if (isMatchingReference(source, target)) {
-                    return true;
+        function resolveNewExpression(node, candidatesOutArray) {
+            if (node.arguments && languageVersion < 1 /* ES5 */) {
+                var spreadIndex = getSpreadArgumentIndex(node.arguments);
+                if (spreadIndex >= 0) {
+                    error(node.arguments[spreadIndex], ts.Diagnostics.Spread_operator_in_new_expressions_is_only_available_when_targeting_ECMAScript_5_and_higher);
                 }
             }
-            return false;
-        }
-        // Return true if target is a property access xxx.yyy, source is a property access xxx.zzz, the declared
-        // type of xxx is a union type, and yyy is a property that is possibly a discriminant. We consider a property
-        // a possible discriminant if its type differs in the constituents of containing union type, and if every
-        // choice is a unit type or a union of unit types.
-        function containsMatchingReferenceDiscriminant(source, target) {
-            return target.kind === 172 /* PropertyAccessExpression */ &&
-                containsMatchingReference(source, target.expression) &&
-                isDiscriminantProperty(getDeclaredTypeOfReference(target.expression), target.name.text);
-        }
-        function getDeclaredTypeOfReference(expr) {
-            if (expr.kind === 69 /* Identifier */) {
-                return getTypeOfSymbol(getResolvedSymbol(expr));
+            var expressionType = checkNonNullExpression(node.expression);
+            if (expressionType === silentNeverType) {
+                return silentNeverSignature;
             }
-            if (expr.kind === 172 /* PropertyAccessExpression */) {
-                var type = getDeclaredTypeOfReference(expr.expression);
-                return type && getTypeOfPropertyOfType(type, expr.name.text);
+            // If expressionType's apparent type(section 3.8.1) is an object type with one or
+            // more construct signatures, the expression is processed in the same manner as a
+            // function call, but using the construct signatures as the initial set of candidate
+            // signatures for overload resolution. The result type of the function call becomes
+            // the result type of the operation.
+            expressionType = getApparentType(expressionType);
+            if (expressionType === unknownType) {
+                // Another error has already been reported
+                return resolveErrorCall(node);
             }
-            return undefined;
-        }
-        function isDiscriminantProperty(type, name) {
-            if (type && type.flags & 524288 /* Union */) {
-                var prop = getUnionOrIntersectionProperty(type, name);
-                if (prop && prop.flags & 268435456 /* SyntheticProperty */) {
-                    if (prop.isDiscriminantProperty === undefined) {
-                        prop.isDiscriminantProperty = prop.hasNonUniformType && isLiteralType(getTypeOfSymbol(prop));
-                    }
-                    return prop.isDiscriminantProperty;
-                }
+            // If the expression is a class of abstract type, then it cannot be instantiated.
+            // Note, only class declarations can be declared abstract.
+            // In the case of a merged class-module or class-interface declaration,
+            // only the class declaration node will have the Abstract flag set.
+            var valueDecl = expressionType.symbol && getClassLikeDeclarationOfSymbol(expressionType.symbol);
+            if (valueDecl && ts.getModifierFlags(valueDecl) & 128 /* Abstract */) {
+                error(node, ts.Diagnostics.Cannot_create_an_instance_of_the_abstract_class_0, ts.declarationNameToString(ts.getNameOfDeclaration(valueDecl)));
+                return resolveErrorCall(node);
             }
-            return false;
-        }
-        function isOrContainsMatchingReference(source, target) {
-            return isMatchingReference(source, target) || containsMatchingReference(source, target);
-        }
-        function hasMatchingArgument(callExpression, reference) {
-            if (callExpression.arguments) {
-                for (var _i = 0, _a = callExpression.arguments; _i < _a.length; _i++) {
-                    var argument = _a[_i];
-                    if (isOrContainsMatchingReference(reference, argument)) {
-                        return true;
-                    }
+            // TS 1.0 spec: 4.11
+            // If expressionType is of type Any, Args can be any argument
+            // list and the result of the operation is of type Any.
+            if (isTypeAny(expressionType)) {
+                if (node.typeArguments) {
+                    error(node, ts.Diagnostics.Untyped_function_calls_may_not_accept_type_arguments);
                 }
+                return resolveUntypedCall(node);
             }
-            if (callExpression.expression.kind === 172 /* PropertyAccessExpression */ &&
-                isOrContainsMatchingReference(reference, callExpression.expression.expression)) {
-                return true;
-            }
-            return false;
-        }
-        function getFlowNodeId(flow) {
-            if (!flow.id) {
-                flow.id = nextFlowId;
-                nextFlowId++;
-            }
-            return flow.id;
-        }
-        function typeMaybeAssignableTo(source, target) {
-            if (!(source.flags & 524288 /* Union */)) {
-                return isTypeAssignableTo(source, target);
-            }
-            for (var _i = 0, _a = source.types; _i < _a.length; _i++) {
-                var t = _a[_i];
-                if (isTypeAssignableTo(t, target)) {
-                    return true;
+            // Technically, this signatures list may be incomplete. We are taking the apparent type,
+            // but we are not including construct signatures that may have been added to the Object or
+            // Function interface, since they have none by default. This is a bit of a leap of faith
+            // that the user will not add any.
+            var constructSignatures = getSignaturesOfType(expressionType, 1 /* Construct */);
+            if (constructSignatures.length) {
+                if (!isConstructorAccessible(node, constructSignatures[0])) {
+                    return resolveErrorCall(node);
                 }
+                return resolveCall(node, constructSignatures, candidatesOutArray);
             }
-            return false;
-        }
-        // Remove those constituent types of declaredType to which no constituent type of assignedType is assignable.
-        // For example, when a variable of type number | string | boolean is assigned a value of type number | boolean,
-        // we remove type string.
-        function getAssignmentReducedType(declaredType, assignedType) {
-            if (declaredType !== assignedType) {
-                if (assignedType.flags & 8192 /* Never */) {
-                    return assignedType;
+            // If expressionType's apparent type is an object type with no construct signatures but
+            // one or more call signatures, the expression is processed as a function call. A compile-time
+            // error occurs if the result of the function call is not Void. The type of the result of the
+            // operation is Any. It is an error to have a Void this type.
+            var callSignatures = getSignaturesOfType(expressionType, 0 /* Call */);
+            if (callSignatures.length) {
+                var signature = resolveCall(node, callSignatures, candidatesOutArray);
+                if (!isJavaScriptConstructor(signature.declaration) && getReturnTypeOfSignature(signature) !== voidType) {
+                    error(node, ts.Diagnostics.Only_a_void_function_can_be_called_with_the_new_keyword);
                 }
-                var reducedType = filterType(declaredType, function (t) { return typeMaybeAssignableTo(assignedType, t); });
-                if (!(reducedType.flags & 8192 /* Never */)) {
-                    return reducedType;
+                if (getThisTypeOfSignature(signature) === voidType) {
+                    error(node, ts.Diagnostics.A_function_that_is_called_with_the_new_keyword_cannot_have_a_this_type_that_is_void);
                 }
+                return signature;
             }
-            return declaredType;
-        }
-        function getTypeFactsOfTypes(types) {
-            var result = 0 /* None */;
-            for (var _i = 0, types_11 = types; _i < types_11.length; _i++) {
-                var t = types_11[_i];
-                result |= getTypeFacts(t);
-            }
-            return result;
-        }
-        function isFunctionObjectType(type) {
-            // We do a quick check for a "bind" property before performing the more expensive subtype
-            // check. This gives us a quicker out in the common case where an object type is not a function.
-            var resolved = resolveStructuredTypeMembers(type);
-            return !!(resolved.callSignatures.length || resolved.constructSignatures.length ||
-                resolved.members["bind"] && isTypeSubtypeOf(type, globalFunctionType));
+            error(node, ts.Diagnostics.Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature);
+            return resolveErrorCall(node);
         }
-        function getTypeFacts(type) {
-            var flags = type.flags;
-            if (flags & 2 /* String */) {
-                return strictNullChecks ? 4079361 /* StringStrictFacts */ : 4194049 /* StringFacts */;
-            }
-            if (flags & 32 /* StringLiteral */) {
-                return strictNullChecks ?
-                    type.text === "" ? 3030785 /* EmptyStringStrictFacts */ : 1982209 /* NonEmptyStringStrictFacts */ :
-                    type.text === "" ? 3145473 /* EmptyStringFacts */ : 4194049 /* NonEmptyStringFacts */;
-            }
-            if (flags & (4 /* Number */ | 16 /* Enum */)) {
-                return strictNullChecks ? 4079234 /* NumberStrictFacts */ : 4193922 /* NumberFacts */;
-            }
-            if (flags & (64 /* NumberLiteral */ | 256 /* EnumLiteral */)) {
-                var isZero = type.text === "0";
-                return strictNullChecks ?
-                    isZero ? 3030658 /* ZeroStrictFacts */ : 1982082 /* NonZeroStrictFacts */ :
-                    isZero ? 3145346 /* ZeroFacts */ : 4193922 /* NonZeroFacts */;
-            }
-            if (flags & 8 /* Boolean */) {
-                return strictNullChecks ? 4078980 /* BooleanStrictFacts */ : 4193668 /* BooleanFacts */;
-            }
-            if (flags & 136 /* BooleanLike */) {
-                return strictNullChecks ?
-                    type === falseType ? 3030404 /* FalseStrictFacts */ : 1981828 /* TrueStrictFacts */ :
-                    type === falseType ? 3145092 /* FalseFacts */ : 4193668 /* TrueFacts */;
-            }
-            if (flags & 2588672 /* ObjectType */) {
-                return isFunctionObjectType(type) ?
-                    strictNullChecks ? 6164448 /* FunctionStrictFacts */ : 8376288 /* FunctionFacts */ :
-                    strictNullChecks ? 6166480 /* ObjectStrictFacts */ : 8378320 /* ObjectFacts */;
-            }
-            if (flags & (1024 /* Void */ | 2048 /* Undefined */)) {
-                return 2457472 /* UndefinedFacts */;
-            }
-            if (flags & 4096 /* Null */) {
-                return 2340752 /* NullFacts */;
-            }
-            if (flags & 512 /* ESSymbol */) {
-                return strictNullChecks ? 1981320 /* SymbolStrictFacts */ : 4193160 /* SymbolFacts */;
-            }
-            if (flags & 16384 /* TypeParameter */) {
-                var constraint = getConstraintOfTypeParameter(type);
-                return getTypeFacts(constraint || emptyObjectType);
-            }
-            if (flags & 1572864 /* UnionOrIntersection */) {
-                return getTypeFactsOfTypes(type.types);
+        function isConstructorAccessible(node, signature) {
+            if (!signature || !signature.declaration) {
+                return true;
             }
-            return 8388607 /* All */;
-        }
-        function getTypeWithFacts(type, include) {
-            return filterType(type, function (t) { return (getTypeFacts(t) & include) !== 0; });
-        }
-        function getTypeWithDefault(type, defaultExpression) {
-            if (defaultExpression) {
-                var defaultType = checkExpression(defaultExpression);
-                return getUnionType([getTypeWithFacts(type, 131072 /* NEUndefined */), defaultType]);
+            var declaration = signature.declaration;
+            var modifiers = ts.getModifierFlags(declaration);
+            // Public constructor is accessible.
+            if (!(modifiers & 24 /* NonPublicAccessibilityModifier */)) {
+                return true;
             }
-            return type;
-        }
-        function getTypeOfDestructuredProperty(type, name) {
-            var text = getTextOfPropertyName(name);
-            return getTypeOfPropertyOfType(type, text) ||
-                isNumericLiteralName(text) && getIndexTypeOfType(type, 1 /* Number */) ||
-                getIndexTypeOfType(type, 0 /* String */) ||
-                unknownType;
-        }
-        function getTypeOfDestructuredArrayElement(type, index) {
-            return isTupleLikeType(type) && getTypeOfPropertyOfType(type, "" + index) ||
-                checkIteratedTypeOrElementType(type, /*errorNode*/ undefined, /*allowStringInput*/ false) ||
-                unknownType;
-        }
-        function getTypeOfDestructuredSpreadElement(type) {
-            return createArrayType(checkIteratedTypeOrElementType(type, /*errorNode*/ undefined, /*allowStringInput*/ false) || unknownType);
-        }
-        function getAssignedTypeOfBinaryExpression(node) {
-            return node.parent.kind === 170 /* ArrayLiteralExpression */ || node.parent.kind === 253 /* PropertyAssignment */ ?
-                getTypeWithDefault(getAssignedType(node), node.right) :
-                checkExpression(node.right);
-        }
-        function getAssignedTypeOfArrayLiteralElement(node, element) {
-            return getTypeOfDestructuredArrayElement(getAssignedType(node), ts.indexOf(node.elements, element));
-        }
-        function getAssignedTypeOfSpreadElement(node) {
-            return getTypeOfDestructuredSpreadElement(getAssignedType(node.parent));
-        }
-        function getAssignedTypeOfPropertyAssignment(node) {
-            return getTypeOfDestructuredProperty(getAssignedType(node.parent), node.name);
-        }
-        function getAssignedTypeOfShorthandPropertyAssignment(node) {
-            return getTypeWithDefault(getAssignedTypeOfPropertyAssignment(node), node.objectAssignmentInitializer);
-        }
-        function getAssignedType(node) {
-            var parent = node.parent;
-            switch (parent.kind) {
-                case 207 /* ForInStatement */:
-                    return stringType;
-                case 208 /* ForOfStatement */:
-                    return checkRightHandSideOfForOf(parent.expression) || unknownType;
-                case 187 /* BinaryExpression */:
-                    return getAssignedTypeOfBinaryExpression(parent);
-                case 181 /* DeleteExpression */:
-                    return undefinedType;
-                case 170 /* ArrayLiteralExpression */:
-                    return getAssignedTypeOfArrayLiteralElement(parent, node);
-                case 191 /* SpreadElementExpression */:
-                    return getAssignedTypeOfSpreadElement(parent);
-                case 253 /* PropertyAssignment */:
-                    return getAssignedTypeOfPropertyAssignment(parent);
-                case 254 /* ShorthandPropertyAssignment */:
-                    return getAssignedTypeOfShorthandPropertyAssignment(parent);
+            var declaringClassDeclaration = getClassLikeDeclarationOfSymbol(declaration.parent.symbol);
+            var declaringClass = getDeclaredTypeOfSymbol(declaration.parent.symbol);
+            // A private or protected constructor can only be instantiated within its own class (or a subclass, for protected)
+            if (!isNodeWithinClass(node, declaringClassDeclaration)) {
+                var containingClass = ts.getContainingClass(node);
+                if (containingClass) {
+                    var containingType = getTypeOfNode(containingClass);
+                    var baseTypes = getBaseTypes(containingType);
+                    while (baseTypes.length) {
+                        var baseType = baseTypes[0];
+                        if (modifiers & 16 /* Protected */ &&
+                            baseType.symbol === declaration.parent.symbol) {
+                            return true;
+                        }
+                        baseTypes = getBaseTypes(baseType);
+                    }
+                }
+                if (modifiers & 8 /* Private */) {
+                    error(node, ts.Diagnostics.Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration, typeToString(declaringClass));
+                }
+                if (modifiers & 16 /* Protected */) {
+                    error(node, ts.Diagnostics.Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration, typeToString(declaringClass));
+                }
+                return false;
             }
-            return unknownType;
-        }
-        function getInitialTypeOfBindingElement(node) {
-            var pattern = node.parent;
-            var parentType = getInitialType(pattern.parent);
-            var type = pattern.kind === 167 /* ObjectBindingPattern */ ?
-                getTypeOfDestructuredProperty(parentType, node.propertyName || node.name) :
-                !node.dotDotDotToken ?
-                    getTypeOfDestructuredArrayElement(parentType, ts.indexOf(pattern.elements, node)) :
-                    getTypeOfDestructuredSpreadElement(parentType);
-            return getTypeWithDefault(type, node.initializer);
-        }
-        function getTypeOfInitializer(node) {
-            // Return the cached type if one is available. If the type of the variable was inferred
-            // from its initializer, we'll already have cached the type. Otherwise we compute it now
-            // without caching such that transient types are reflected.
-            var links = getNodeLinks(node);
-            return links.resolvedType || checkExpression(node);
+            return true;
         }
-        function getInitialTypeOfVariableDeclaration(node) {
-            if (node.initializer) {
-                return getTypeOfInitializer(node.initializer);
-            }
-            if (node.parent.parent.kind === 207 /* ForInStatement */) {
-                return stringType;
-            }
-            if (node.parent.parent.kind === 208 /* ForOfStatement */) {
-                return checkRightHandSideOfForOf(node.parent.parent.expression) || unknownType;
+        function resolveTaggedTemplateExpression(node, candidatesOutArray) {
+            var tagType = checkExpression(node.tag);
+            var apparentType = getApparentType(tagType);
+            if (apparentType === unknownType) {
+                // Another error has already been reported
+                return resolveErrorCall(node);
             }
-            return unknownType;
-        }
-        function getInitialType(node) {
-            return node.kind === 218 /* VariableDeclaration */ ?
-                getInitialTypeOfVariableDeclaration(node) :
-                getInitialTypeOfBindingElement(node);
-        }
-        function getInitialOrAssignedType(node) {
-            return node.kind === 218 /* VariableDeclaration */ || node.kind === 169 /* BindingElement */ ?
-                getInitialType(node) :
-                getAssignedType(node);
-        }
-        function getReferenceCandidate(node) {
-            switch (node.kind) {
-                case 178 /* ParenthesizedExpression */:
-                    return getReferenceCandidate(node.expression);
-                case 187 /* BinaryExpression */:
-                    switch (node.operatorToken.kind) {
-                        case 56 /* EqualsToken */:
-                            return getReferenceCandidate(node.left);
-                        case 24 /* CommaToken */:
-                            return getReferenceCandidate(node.right);
-                    }
+            var callSignatures = getSignaturesOfType(apparentType, 0 /* Call */);
+            var constructSignatures = getSignaturesOfType(apparentType, 1 /* Construct */);
+            if (isUntypedFunctionCall(tagType, apparentType, callSignatures.length, constructSignatures.length)) {
+                return resolveUntypedCall(node);
             }
-            return node;
-        }
-        function getTypeOfSwitchClause(clause) {
-            if (clause.kind === 249 /* CaseClause */) {
-                var caseType = getRegularTypeOfLiteralType(checkExpression(clause.expression));
-                return isUnitType(caseType) ? caseType : undefined;
+            if (!callSignatures.length) {
+                error(node, ts.Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures, typeToString(apparentType));
+                return resolveErrorCall(node);
             }
-            return neverType;
+            return resolveCall(node, callSignatures, candidatesOutArray);
         }
-        function getSwitchClauseTypes(switchStatement) {
-            var links = getNodeLinks(switchStatement);
-            if (!links.switchTypes) {
-                // If all case clauses specify expressions that have unit types, we return an array
-                // of those unit types. Otherwise we return an empty array.
-                var types = ts.map(switchStatement.caseBlock.clauses, getTypeOfSwitchClause);
-                links.switchTypes = !ts.contains(types, undefined) ? types : emptyArray;
+        /**
+         * Gets the localized diagnostic head message to use for errors when resolving a decorator as a call expression.
+         */
+        function getDiagnosticHeadMessageForDecoratorResolution(node) {
+            switch (node.parent.kind) {
+                case 229 /* ClassDeclaration */:
+                case 199 /* ClassExpression */:
+                    return ts.Diagnostics.Unable_to_resolve_signature_of_class_decorator_when_called_as_an_expression;
+                case 146 /* Parameter */:
+                    return ts.Diagnostics.Unable_to_resolve_signature_of_parameter_decorator_when_called_as_an_expression;
+                case 149 /* PropertyDeclaration */:
+                    return ts.Diagnostics.Unable_to_resolve_signature_of_property_decorator_when_called_as_an_expression;
+                case 151 /* MethodDeclaration */:
+                case 153 /* GetAccessor */:
+                case 154 /* SetAccessor */:
+                    return ts.Diagnostics.Unable_to_resolve_signature_of_method_decorator_when_called_as_an_expression;
             }
-            return links.switchTypes;
         }
-        function eachTypeContainedIn(source, types) {
-            return source.flags & 524288 /* Union */ ? !ts.forEach(source.types, function (t) { return !ts.contains(types, t); }) : ts.contains(types, source);
+        /**
+         * Resolves a decorator as if it were a call expression.
+         */
+        function resolveDecorator(node, candidatesOutArray) {
+            var funcType = checkExpression(node.expression);
+            var apparentType = getApparentType(funcType);
+            if (apparentType === unknownType) {
+                return resolveErrorCall(node);
+            }
+            var callSignatures = getSignaturesOfType(apparentType, 0 /* Call */);
+            var constructSignatures = getSignaturesOfType(apparentType, 1 /* Construct */);
+            if (isUntypedFunctionCall(funcType, apparentType, callSignatures.length, constructSignatures.length)) {
+                return resolveUntypedCall(node);
+            }
+            var headMessage = getDiagnosticHeadMessageForDecoratorResolution(node);
+            if (!callSignatures.length) {
+                var errorInfo = void 0;
+                errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures, typeToString(apparentType));
+                errorInfo = ts.chainDiagnosticMessages(errorInfo, headMessage);
+                diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(node, errorInfo));
+                return resolveErrorCall(node);
+            }
+            return resolveCall(node, callSignatures, candidatesOutArray, headMessage);
         }
-        function isTypeSubsetOf(source, target) {
-            return source === target || target.flags & 524288 /* Union */ && isTypeSubsetOfUnion(source, target);
+        /**
+         * This function is similar to getResolvedSignature but is exclusively for trying to resolve JSX stateless-function component.
+         * The main reason we have to use this function instead of getResolvedSignature because, the caller of this function will already check the type of openingLikeElement's tagName
+         * and pass the type as elementType. The elementType can not be a union (as such case should be handled by the caller of this function)
+         * Note: at this point, we are still not sure whether the opening-like element is a stateless function component or not.
+         * @param openingLikeElement an opening-like JSX element to try to resolve as JSX stateless function
+         * @param elementType an element type of the opneing-like element by checking opening-like element's tagname.
+         * @param candidatesOutArray an array of signature to be filled in by the function. It is passed by signature help in the language service;
+         *                           the function will fill it up with appropriate candidate signatures
+         */
+        function getResolvedJsxStatelessFunctionSignature(openingLikeElement, elementType, candidatesOutArray) {
+            ts.Debug.assert(!(elementType.flags & 65536 /* Union */));
+            var callSignature = resolveStatelessJsxOpeningLikeElement(openingLikeElement, elementType, candidatesOutArray);
+            return callSignature;
         }
-        function isTypeSubsetOfUnion(source, target) {
-            if (source.flags & 524288 /* Union */) {
-                for (var _i = 0, _a = source.types; _i < _a.length; _i++) {
-                    var t = _a[_i];
-                    if (!containsType(target.types, t)) {
-                        return false;
-                    }
+        /**
+         * Try treating a given opening-like element as stateless function component and resolve a tagName to a function signature.
+         * @param openingLikeElement an JSX opening-like element we want to try resolve its stateless function if possible
+         * @param elementType a type of the opening-like JSX element, a result of resolving tagName in opening-like element.
+         * @param candidatesOutArray an array of signature to be filled in by the function. It is passed by signature help in the language service;
+         *                           the function will fill it up with appropriate candidate signatures
+         * @return a resolved signature if we can find function matching function signature through resolve call or a first signature in the list of functions.
+         *         otherwise return undefined if tag-name of the opening-like element doesn't have call signatures
+         */
+        function resolveStatelessJsxOpeningLikeElement(openingLikeElement, elementType, candidatesOutArray) {
+            // If this function is called from language service, elementType can be a union type. This is not possible if the function is called from compiler (see: resolveCustomJsxElementAttributesType)
+            if (elementType.flags & 65536 /* Union */) {
+                var types = elementType.types;
+                var result = void 0;
+                for (var _i = 0, types_16 = types; _i < types_16.length; _i++) {
+                    var type = types_16[_i];
+                    result = result || resolveStatelessJsxOpeningLikeElement(openingLikeElement, type, candidatesOutArray);
                 }
-                return true;
+                return result;
             }
-            if (source.flags & 256 /* EnumLiteral */ && target.flags & 16 /* Enum */ && source.baseType === target) {
-                return true;
+            var callSignatures = elementType && getSignaturesOfType(elementType, 0 /* Call */);
+            if (callSignatures && callSignatures.length > 0) {
+                var callSignature = void 0;
+                callSignature = resolveCall(openingLikeElement, callSignatures, candidatesOutArray);
+                return callSignature;
             }
-            return containsType(target.types, source);
+            return undefined;
         }
-        function filterType(type, f) {
-            if (type.flags & 524288 /* Union */) {
-                var types = type.types;
-                var filtered = ts.filter(types, f);
-                return filtered === types ? type : getUnionTypeFromSortedList(filtered);
+        function resolveSignature(node, candidatesOutArray) {
+            switch (node.kind) {
+                case 181 /* CallExpression */:
+                    return resolveCallExpression(node, candidatesOutArray);
+                case 182 /* NewExpression */:
+                    return resolveNewExpression(node, candidatesOutArray);
+                case 183 /* TaggedTemplateExpression */:
+                    return resolveTaggedTemplateExpression(node, candidatesOutArray);
+                case 147 /* Decorator */:
+                    return resolveDecorator(node, candidatesOutArray);
+                case 251 /* JsxOpeningElement */:
+                case 250 /* JsxSelfClosingElement */:
+                    // This code-path is called by language service
+                    return resolveStatelessJsxOpeningLikeElement(node, checkExpression(node.tagName), candidatesOutArray);
             }
-            return f(type) ? type : neverType;
+            ts.Debug.fail("Branch in 'resolveSignature' should be unreachable.");
         }
-        function isIncomplete(flowType) {
-            return flowType.flags === 0;
+        /**
+         * Resolve a signature of a given call-like expression.
+         * @param node a call-like expression to try resolve a signature for
+         * @param candidatesOutArray an array of signature to be filled in by the function. It is passed by signature help in the language service;
+         *                           the function will fill it up with appropriate candidate signatures
+         * @return a signature of the call-like expression or undefined if one can't be found
+         */
+        function getResolvedSignature(node, candidatesOutArray) {
+            var links = getNodeLinks(node);
+            // If getResolvedSignature has already been called, we will have cached the resolvedSignature.
+            // However, it is possible that either candidatesOutArray was not passed in the first time,
+            // or that a different candidatesOutArray was passed in. Therefore, we need to redo the work
+            // to correctly fill the candidatesOutArray.
+            var cached = links.resolvedSignature;
+            if (cached && cached !== resolvingSignature && !candidatesOutArray) {
+                return cached;
+            }
+            links.resolvedSignature = resolvingSignature;
+            var result = resolveSignature(node, candidatesOutArray);
+            // If signature resolution originated in control flow type analysis (for example to compute the
+            // assigned type in a flow assignment) we don't cache the result as it may be based on temporary
+            // types from the control flow analysis.
+            links.resolvedSignature = flowLoopStart === flowLoopCount ? result : cached;
+            return result;
         }
-        function getTypeFromFlowType(flowType) {
-            return flowType.flags === 0 ? flowType.type : flowType;
+        function getResolvedOrAnySignature(node) {
+            // If we're already in the process of resolving the given signature, don't resolve again as
+            // that could cause infinite recursion. Instead, return anySignature.
+            return getNodeLinks(node).resolvedSignature === resolvingSignature ? resolvingSignature : getResolvedSignature(node);
         }
-        function createFlowType(type, incomplete) {
-            return incomplete ? { flags: 0, type: type } : type;
+        /**
+         * Indicates whether a declaration can be treated as a constructor in a JavaScript
+         * file.
+         */
+        function isJavaScriptConstructor(node) {
+            if (ts.isInJavaScriptFile(node)) {
+                // If the node has a @class tag, treat it like a constructor.
+                if (ts.getJSDocClassTag(node))
+                    return true;
+                // If the symbol of the node has members, treat it like a constructor.
+                var symbol = ts.isFunctionDeclaration(node) || ts.isFunctionExpression(node) ? getSymbolOfNode(node) :
+                    ts.isVariableDeclaration(node) && ts.isFunctionExpression(node.initializer) ? getSymbolOfNode(node.initializer) :
+                        undefined;
+                return symbol && symbol.members !== undefined;
+            }
+            return false;
         }
-        function getFlowTypeOfReference(reference, declaredType, assumeInitialized, flowContainer) {
-            var key;
-            if (!reference.flowNode || assumeInitialized && !(declaredType.flags & 4178943 /* Narrowable */)) {
-                return declaredType;
+        function getInferredClassType(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.inferredClassType) {
+                links.inferredClassType = createAnonymousType(symbol, symbol.members || emptySymbols, emptyArray, emptyArray, /*stringIndexType*/ undefined, /*numberIndexType*/ undefined);
             }
-            var initialType = assumeInitialized ? declaredType : includeFalsyTypes(declaredType, 2048 /* Undefined */);
-            var visitedFlowStart = visitedFlowCount;
-            var result = getTypeFromFlowType(getTypeAtFlowNode(reference.flowNode));
-            visitedFlowCount = visitedFlowStart;
-            if (reference.parent.kind === 196 /* NonNullExpression */ && getTypeWithFacts(result, 524288 /* NEUndefinedOrNull */).flags & 8192 /* Never */) {
-                return declaredType;
+            return links.inferredClassType;
+        }
+        function isInferredClassType(type) {
+            return type.symbol
+                && getObjectFlags(type) & 16 /* Anonymous */
+                && getSymbolLinks(type.symbol).inferredClassType === type;
+        }
+        /**
+         * Syntactically and semantically checks a call or new expression.
+         * @param node The call/new expression to be checked.
+         * @returns On success, the expression's signature's return type. On failure, anyType.
+         */
+        function checkCallExpression(node) {
+            // Grammar checking; stop grammar-checking if checkGrammarTypeArguments return true
+            checkGrammarTypeArguments(node, node.typeArguments) || checkGrammarArguments(node, node.arguments);
+            var signature = getResolvedSignature(node);
+            if (node.expression.kind === 97 /* SuperKeyword */) {
+                return voidType;
             }
-            return result;
-            function getTypeAtFlowNode(flow) {
-                while (true) {
-                    if (flow.flags & 512 /* Shared */) {
-                        // We cache results of flow type resolution for shared nodes that were previously visited in
-                        // the same getFlowTypeOfReference invocation. A node is considered shared when it is the
-                        // antecedent of more than one node.
-                        for (var i = visitedFlowStart; i < visitedFlowCount; i++) {
-                            if (visitedFlowNodes[i] === flow) {
-                                return visitedFlowTypes[i];
-                            }
-                        }
-                    }
-                    var type = void 0;
-                    if (flow.flags & 16 /* Assignment */) {
-                        type = getTypeAtFlowAssignment(flow);
-                        if (!type) {
-                            flow = flow.antecedent;
-                            continue;
-                        }
-                    }
-                    else if (flow.flags & 96 /* Condition */) {
-                        type = getTypeAtFlowCondition(flow);
-                    }
-                    else if (flow.flags & 128 /* SwitchClause */) {
-                        type = getTypeAtSwitchClause(flow);
-                    }
-                    else if (flow.flags & 12 /* Label */) {
-                        if (flow.antecedents.length === 1) {
-                            flow = flow.antecedents[0];
-                            continue;
-                        }
-                        type = flow.flags & 4 /* BranchLabel */ ?
-                            getTypeAtFlowBranchLabel(flow) :
-                            getTypeAtFlowLoopLabel(flow);
-                    }
-                    else if (flow.flags & 2 /* Start */) {
-                        // Check if we should continue with the control flow of the containing function.
-                        var container = flow.container;
-                        if (container && container !== flowContainer && reference.kind !== 172 /* PropertyAccessExpression */) {
-                            flow = container.flowNode;
-                            continue;
-                        }
-                        // At the top of the flow we have the initial type.
-                        type = initialType;
+            if (node.kind === 182 /* NewExpression */) {
+                var declaration = signature.declaration;
+                if (declaration &&
+                    declaration.kind !== 152 /* Constructor */ &&
+                    declaration.kind !== 156 /* ConstructSignature */ &&
+                    declaration.kind !== 161 /* ConstructorType */ &&
+                    !ts.isJSDocConstructSignature(declaration)) {
+                    // When resolved signature is a call signature (and not a construct signature) the result type is any, unless
+                    // the declaring function had members created through 'x.prototype.y = expr' or 'this.y = expr' psuedodeclarations
+                    // in a JS file
+                    // Note:JS inferred classes might come from a variable declaration instead of a function declaration.
+                    // In this case, using getResolvedSymbol directly is required to avoid losing the members from the declaration.
+                    var funcSymbol = node.expression.kind === 71 /* Identifier */ ?
+                        getResolvedSymbol(node.expression) :
+                        checkExpression(node.expression).symbol;
+                    if (funcSymbol && ts.isDeclarationOfFunctionOrClassExpression(funcSymbol)) {
+                        funcSymbol = getSymbolOfNode(funcSymbol.valueDeclaration.initializer);
                     }
-                    else {
-                        // Unreachable code errors are reported in the binding phase. Here we
-                        // simply return the declared type to reduce follow-on errors.
-                        type = declaredType;
+                    if (funcSymbol && funcSymbol.flags & 16 /* Function */ && (funcSymbol.members || ts.getJSDocClassTag(funcSymbol.valueDeclaration))) {
+                        return getInferredClassType(funcSymbol);
                     }
-                    if (flow.flags & 512 /* Shared */) {
-                        // Record visited node and the associated type in the cache.
-                        visitedFlowNodes[visitedFlowCount] = flow;
-                        visitedFlowTypes[visitedFlowCount] = type;
-                        visitedFlowCount++;
+                    else if (noImplicitAny) {
+                        error(node, ts.Diagnostics.new_expression_whose_target_lacks_a_construct_signature_implicitly_has_an_any_type);
                     }
-                    return type;
+                    return anyType;
                 }
             }
-            function getTypeAtFlowAssignment(flow) {
-                var node = flow.node;
-                // Assignments only narrow the computed type if the declared type is a union type. Thus, we
-                // only need to evaluate the assigned type if the declared type is a union type.
-                if (isMatchingReference(reference, node)) {
-                    var isIncrementOrDecrement = node.parent.kind === 185 /* PrefixUnaryExpression */ || node.parent.kind === 186 /* PostfixUnaryExpression */;
-                    return declaredType.flags & 524288 /* Union */ && !isIncrementOrDecrement ?
-                        getAssignmentReducedType(declaredType, getInitialOrAssignedType(node)) :
-                        declaredType;
-                }
-                // We didn't have a direct match. However, if the reference is a dotted name, this
-                // may be an assignment to a left hand part of the reference. For example, for a
-                // reference 'x.y.z', we may be at an assignment to 'x.y' or 'x'. In that case,
-                // return the declared type.
-                if (containsMatchingReference(reference, node)) {
-                    return declaredType;
-                }
-                // Assignment doesn't affect reference
-                return undefined;
+            // In JavaScript files, calls to any identifier 'require' are treated as external module imports
+            if (ts.isInJavaScriptFile(node) && isCommonJsRequire(node)) {
+                return resolveExternalModuleTypeByLiteral(node.arguments[0]);
             }
-            function getTypeAtFlowCondition(flow) {
-                var flowType = getTypeAtFlowNode(flow.antecedent);
-                var type = getTypeFromFlowType(flowType);
-                if (!(type.flags & 8192 /* Never */)) {
-                    // If we have an antecedent type (meaning we're reachable in some way), we first
-                    // attempt to narrow the antecedent type. If that produces the never type, and if
-                    // the antecedent type is incomplete (i.e. a transient type in a loop), then we
-                    // take the type guard as an indication that control *could* reach here once we
-                    // have the complete type. We proceed by switching to the silent never type which
-                    // doesn't report errors when operators are applied to it. Note that this is the
-                    // *only* place a silent never type is ever generated.
-                    var assumeTrue = (flow.flags & 32 /* TrueCondition */) !== 0;
-                    type = narrowType(type, flow.expression, assumeTrue);
-                    if (type.flags & 8192 /* Never */ && isIncomplete(flowType)) {
-                        type = silentNeverType;
-                    }
-                }
-                return createFlowType(type, isIncomplete(flowType));
+            return getReturnTypeOfSignature(signature);
+        }
+        function checkImportCallExpression(node) {
+            // Check grammar of dynamic import
+            checkGrammarArguments(node, node.arguments) || checkGrammarImportCallExpression(node);
+            if (node.arguments.length === 0) {
+                return createPromiseReturnType(node, anyType);
             }
-            function getTypeAtSwitchClause(flow) {
-                var flowType = getTypeAtFlowNode(flow.antecedent);
-                var type = getTypeFromFlowType(flowType);
-                var expr = flow.switchStatement.expression;
-                if (isMatchingReference(reference, expr)) {
-                    type = narrowTypeBySwitchOnDiscriminant(type, flow.switchStatement, flow.clauseStart, flow.clauseEnd);
-                }
-                else if (isMatchingReferenceDiscriminant(expr)) {
-                    type = narrowTypeByDiscriminant(type, expr, function (t) { return narrowTypeBySwitchOnDiscriminant(t, flow.switchStatement, flow.clauseStart, flow.clauseEnd); });
-                }
-                return createFlowType(type, isIncomplete(flowType));
+            var specifier = node.arguments[0];
+            var specifierType = checkExpressionCached(specifier);
+            // Even though multiple arugments is grammatically incorrect, type-check extra arguments for completion
+            for (var i = 1; i < node.arguments.length; ++i) {
+                checkExpressionCached(node.arguments[i]);
             }
-            function getTypeAtFlowBranchLabel(flow) {
-                var antecedentTypes = [];
-                var subtypeReduction = false;
-                var seenIncomplete = false;
-                for (var _i = 0, _a = flow.antecedents; _i < _a.length; _i++) {
-                    var antecedent = _a[_i];
-                    var flowType = getTypeAtFlowNode(antecedent);
-                    var type = getTypeFromFlowType(flowType);
-                    // If the type at a particular antecedent path is the declared type and the
-                    // reference is known to always be assigned (i.e. when declared and initial types
-                    // are the same), there is no reason to process more antecedents since the only
-                    // possible outcome is subtypes that will be removed in the final union type anyway.
-                    if (type === declaredType && declaredType === initialType) {
-                        return type;
-                    }
-                    if (!ts.contains(antecedentTypes, type)) {
-                        antecedentTypes.push(type);
-                    }
-                    // If an antecedent type is not a subset of the declared type, we need to perform
-                    // subtype reduction. This happens when a "foreign" type is injected into the control
-                    // flow using the instanceof operator or a user defined type predicate.
-                    if (!isTypeSubsetOf(type, declaredType)) {
-                        subtypeReduction = true;
-                    }
-                    if (isIncomplete(flowType)) {
-                        seenIncomplete = true;
-                    }
-                }
-                return createFlowType(getUnionType(antecedentTypes, subtypeReduction), seenIncomplete);
+            if (specifierType.flags & 2048 /* Undefined */ || specifierType.flags & 4096 /* Null */ || !isTypeAssignableTo(specifierType, stringType)) {
+                error(specifier, ts.Diagnostics.Dynamic_import_s_specifier_must_be_of_type_string_but_here_has_type_0, typeToString(specifierType));
             }
-            function getTypeAtFlowLoopLabel(flow) {
-                // If we have previously computed the control flow type for the reference at
-                // this flow loop junction, return the cached type.
-                var id = getFlowNodeId(flow);
-                var cache = flowLoopCaches[id] || (flowLoopCaches[id] = ts.createMap());
-                if (!key) {
-                    key = getFlowCacheKey(reference);
-                }
-                if (cache[key]) {
-                    return cache[key];
-                }
-                // If this flow loop junction and reference are already being processed, return
-                // the union of the types computed for each branch so far, marked as incomplete.
-                // We should never see an empty array here because the first antecedent of a loop
-                // junction is always the non-looping control flow path that leads to the top.
-                for (var i = flowLoopStart; i < flowLoopCount; i++) {
-                    if (flowLoopNodes[i] === flow && flowLoopKeys[i] === key) {
-                        return createFlowType(getUnionType(flowLoopTypes[i]), /*incomplete*/ true);
-                    }
-                }
-                // Add the flow loop junction and reference to the in-process stack and analyze
-                // each antecedent code path.
-                var antecedentTypes = [];
-                var subtypeReduction = false;
-                var firstAntecedentType;
-                flowLoopNodes[flowLoopCount] = flow;
-                flowLoopKeys[flowLoopCount] = key;
-                flowLoopTypes[flowLoopCount] = antecedentTypes;
-                for (var _i = 0, _a = flow.antecedents; _i < _a.length; _i++) {
-                    var antecedent = _a[_i];
-                    flowLoopCount++;
-                    var flowType = getTypeAtFlowNode(antecedent);
-                    flowLoopCount--;
-                    if (!firstAntecedentType) {
-                        firstAntecedentType = flowType;
-                    }
-                    var type = getTypeFromFlowType(flowType);
-                    // If we see a value appear in the cache it is a sign that control flow  analysis
-                    // was restarted and completed by checkExpressionCached. We can simply pick up
-                    // the resulting type and bail out.
-                    if (cache[key]) {
-                        return cache[key];
-                    }
-                    if (!ts.contains(antecedentTypes, type)) {
-                        antecedentTypes.push(type);
-                    }
-                    // If an antecedent type is not a subset of the declared type, we need to perform
-                    // subtype reduction. This happens when a "foreign" type is injected into the control
-                    // flow using the instanceof operator or a user defined type predicate.
-                    if (!isTypeSubsetOf(type, declaredType)) {
-                        subtypeReduction = true;
-                    }
-                    // If the type at a particular antecedent path is the declared type there is no
-                    // reason to process more antecedents since the only possible outcome is subtypes
-                    // that will be removed in the final union type anyway.
-                    if (type === declaredType) {
-                        break;
-                    }
-                }
-                // The result is incomplete if the first antecedent (the non-looping control flow path)
-                // is incomplete.
-                var result = getUnionType(antecedentTypes, subtypeReduction);
-                if (isIncomplete(firstAntecedentType)) {
-                    return createFlowType(result, /*incomplete*/ true);
+            // resolveExternalModuleName will return undefined if the moduleReferenceExpression is not a string literal
+            var moduleSymbol = resolveExternalModuleName(node, specifier);
+            if (moduleSymbol) {
+                var esModuleSymbol = resolveESModuleSymbol(moduleSymbol, specifier, /*dontRecursivelyResolve*/ true);
+                if (esModuleSymbol) {
+                    return createPromiseReturnType(node, getTypeOfSymbol(esModuleSymbol));
                 }
-                return cache[key] = result;
-            }
-            function isMatchingReferenceDiscriminant(expr) {
-                return expr.kind === 172 /* PropertyAccessExpression */ &&
-                    declaredType.flags & 524288 /* Union */ &&
-                    isMatchingReference(reference, expr.expression) &&
-                    isDiscriminantProperty(declaredType, expr.name.text);
             }
-            function narrowTypeByDiscriminant(type, propAccess, narrowType) {
-                var propName = propAccess.name.text;
-                var propType = getTypeOfPropertyOfType(type, propName);
-                var narrowedPropType = propType && narrowType(propType);
-                return propType === narrowedPropType ? type : filterType(type, function (t) { return isTypeComparableTo(getTypeOfPropertyOfType(t, propName), narrowedPropType); });
+            return createPromiseReturnType(node, anyType);
+        }
+        function isCommonJsRequire(node) {
+            if (!ts.isRequireCall(node, /*checkArgumentIsStringLiteral*/ true)) {
+                return false;
             }
-            function narrowTypeByTruthiness(type, expr, assumeTrue) {
-                if (isMatchingReference(reference, expr)) {
-                    return getTypeWithFacts(type, assumeTrue ? 1048576 /* Truthy */ : 2097152 /* Falsy */);
-                }
-                if (isMatchingReferenceDiscriminant(expr)) {
-                    return narrowTypeByDiscriminant(type, expr, function (t) { return getTypeWithFacts(t, assumeTrue ? 1048576 /* Truthy */ : 2097152 /* Falsy */); });
-                }
-                if (containsMatchingReferenceDiscriminant(reference, expr)) {
-                    return declaredType;
-                }
-                return type;
+            // Make sure require is not a local function
+            var resolvedRequire = resolveName(node.expression, node.expression.text, 107455 /* Value */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined);
+            if (!resolvedRequire) {
+                // project does not contain symbol named 'require' - assume commonjs require
+                return true;
             }
-            function narrowTypeByBinaryExpression(type, expr, assumeTrue) {
-                switch (expr.operatorToken.kind) {
-                    case 56 /* EqualsToken */:
-                        return narrowTypeByTruthiness(type, expr.left, assumeTrue);
-                    case 30 /* EqualsEqualsToken */:
-                    case 31 /* ExclamationEqualsToken */:
-                    case 32 /* EqualsEqualsEqualsToken */:
-                    case 33 /* ExclamationEqualsEqualsToken */:
-                        var operator_1 = expr.operatorToken.kind;
-                        var left_1 = getReferenceCandidate(expr.left);
-                        var right_1 = getReferenceCandidate(expr.right);
-                        if (left_1.kind === 182 /* TypeOfExpression */ && right_1.kind === 9 /* StringLiteral */) {
-                            return narrowTypeByTypeof(type, left_1, operator_1, right_1, assumeTrue);
-                        }
-                        if (right_1.kind === 182 /* TypeOfExpression */ && left_1.kind === 9 /* StringLiteral */) {
-                            return narrowTypeByTypeof(type, right_1, operator_1, left_1, assumeTrue);
-                        }
-                        if (isMatchingReference(reference, left_1)) {
-                            return narrowTypeByEquality(type, operator_1, right_1, assumeTrue);
-                        }
-                        if (isMatchingReference(reference, right_1)) {
-                            return narrowTypeByEquality(type, operator_1, left_1, assumeTrue);
-                        }
-                        if (isMatchingReferenceDiscriminant(left_1)) {
-                            return narrowTypeByDiscriminant(type, left_1, function (t) { return narrowTypeByEquality(t, operator_1, right_1, assumeTrue); });
-                        }
-                        if (isMatchingReferenceDiscriminant(right_1)) {
-                            return narrowTypeByDiscriminant(type, right_1, function (t) { return narrowTypeByEquality(t, operator_1, left_1, assumeTrue); });
-                        }
-                        if (containsMatchingReferenceDiscriminant(reference, left_1) || containsMatchingReferenceDiscriminant(reference, right_1)) {
-                            return declaredType;
-                        }
-                        break;
-                    case 91 /* InstanceOfKeyword */:
-                        return narrowTypeByInstanceof(type, expr, assumeTrue);
-                    case 24 /* CommaToken */:
-                        return narrowType(type, expr.right, assumeTrue);
-                }
-                return type;
+            // project includes symbol named 'require' - make sure that it it ambient and local non-alias
+            if (resolvedRequire.flags & 8388608 /* Alias */) {
+                return false;
             }
-            function narrowTypeByEquality(type, operator, value, assumeTrue) {
-                if (type.flags & 1 /* Any */) {
-                    return type;
-                }
-                if (operator === 31 /* ExclamationEqualsToken */ || operator === 33 /* ExclamationEqualsEqualsToken */) {
-                    assumeTrue = !assumeTrue;
-                }
-                var valueType = checkExpression(value);
-                if (valueType.flags & 6144 /* Nullable */) {
-                    if (!strictNullChecks) {
-                        return type;
-                    }
-                    var doubleEquals = operator === 30 /* EqualsEqualsToken */ || operator === 31 /* ExclamationEqualsToken */;
-                    var facts = doubleEquals ?
-                        assumeTrue ? 65536 /* EQUndefinedOrNull */ : 524288 /* NEUndefinedOrNull */ :
-                        value.kind === 93 /* NullKeyword */ ?
-                            assumeTrue ? 32768 /* EQNull */ : 262144 /* NENull */ :
-                            assumeTrue ? 16384 /* EQUndefined */ : 131072 /* NEUndefined */;
-                    return getTypeWithFacts(type, facts);
-                }
-                if (type.flags & 2589191 /* NotUnionOrUnit */) {
-                    return type;
-                }
-                if (assumeTrue) {
-                    var narrowedType = filterType(type, function (t) { return areTypesComparable(t, valueType); });
-                    return narrowedType.flags & 8192 /* Never */ ? type : narrowedType;
-                }
-                if (isUnitType(valueType)) {
-                    var regularType_1 = getRegularTypeOfLiteralType(valueType);
-                    return filterType(type, function (t) { return getRegularTypeOfLiteralType(t) !== regularType_1; });
-                }
-                return type;
+            var targetDeclarationKind = resolvedRequire.flags & 16 /* Function */
+                ? 228 /* FunctionDeclaration */
+                : resolvedRequire.flags & 3 /* Variable */
+                    ? 226 /* VariableDeclaration */
+                    : 0 /* Unknown */;
+            if (targetDeclarationKind !== 0 /* Unknown */) {
+                var decl = ts.getDeclarationOfKind(resolvedRequire, targetDeclarationKind);
+                // function/variable declaration should be ambient
+                return ts.isInAmbientContext(decl);
             }
-            function narrowTypeByTypeof(type, typeOfExpr, operator, literal, assumeTrue) {
-                // We have '==', '!=', '====', or !==' operator with 'typeof xxx' and string literal operands
-                var target = getReferenceCandidate(typeOfExpr.expression);
-                if (!isMatchingReference(reference, target)) {
-                    // For a reference of the form 'x.y', a 'typeof x === ...' type guard resets the
-                    // narrowed type of 'y' to its declared type.
-                    if (containsMatchingReference(reference, target)) {
-                        return declaredType;
-                    }
-                    return type;
-                }
-                if (operator === 31 /* ExclamationEqualsToken */ || operator === 33 /* ExclamationEqualsEqualsToken */) {
-                    assumeTrue = !assumeTrue;
-                }
-                if (assumeTrue && !(type.flags & 524288 /* Union */)) {
-                    // We narrow a non-union type to an exact primitive type if the non-union type
-                    // is a supertype of that primitive type. For example, type 'any' can be narrowed
-                    // to one of the primitive types.
-                    var targetType = typeofTypesByName[literal.text];
-                    if (targetType && isTypeSubtypeOf(targetType, type)) {
-                        return targetType;
-                    }
+            return false;
+        }
+        function checkTaggedTemplateExpression(node) {
+            return getReturnTypeOfSignature(getResolvedSignature(node));
+        }
+        function checkAssertion(node) {
+            var exprType = getRegularTypeOfObjectLiteral(getBaseTypeOfLiteralType(checkExpression(node.expression)));
+            checkSourceElement(node.type);
+            var targetType = getTypeFromTypeNode(node.type);
+            if (produceDiagnostics && targetType !== unknownType) {
+                var widenedType = getWidenedType(exprType);
+                if (!isTypeComparableTo(targetType, widenedType)) {
+                    checkTypeComparableTo(exprType, targetType, node, ts.Diagnostics.Type_0_cannot_be_converted_to_type_1);
                 }
-                var facts = assumeTrue ?
-                    typeofEQFacts[literal.text] || 64 /* TypeofEQHostObject */ :
-                    typeofNEFacts[literal.text] || 8192 /* TypeofNEHostObject */;
-                return getTypeWithFacts(type, facts);
             }
-            function narrowTypeBySwitchOnDiscriminant(type, switchStatement, clauseStart, clauseEnd) {
-                // We only narrow if all case expressions specify values with unit types
-                var switchTypes = getSwitchClauseTypes(switchStatement);
-                if (!switchTypes.length) {
-                    return type;
-                }
-                var clauseTypes = switchTypes.slice(clauseStart, clauseEnd);
-                var hasDefaultClause = clauseStart === clauseEnd || ts.contains(clauseTypes, neverType);
-                var discriminantType = getUnionType(clauseTypes);
-                var caseType = discriminantType.flags & 8192 /* Never */ ? neverType : filterType(type, function (t) { return isTypeComparableTo(discriminantType, t); });
-                if (!hasDefaultClause) {
-                    return caseType;
-                }
-                var defaultType = filterType(type, function (t) { return !(isUnitType(t) && ts.contains(switchTypes, getRegularTypeOfLiteralType(t))); });
-                return caseType.flags & 8192 /* Never */ ? defaultType : getUnionType([caseType, defaultType]);
+            return targetType;
+        }
+        function checkNonNullAssertion(node) {
+            return getNonNullableType(checkExpression(node.expression));
+        }
+        function checkMetaProperty(node) {
+            checkGrammarMetaProperty(node);
+            var container = ts.getNewTargetContainer(node);
+            if (!container) {
+                error(node, ts.Diagnostics.Meta_property_0_is_only_allowed_in_the_body_of_a_function_declaration_function_expression_or_constructor, "new.target");
+                return unknownType;
             }
-            function narrowTypeByInstanceof(type, expr, assumeTrue) {
-                var left = getReferenceCandidate(expr.left);
-                if (!isMatchingReference(reference, left)) {
-                    // For a reference of the form 'x.y', an 'x instanceof T' type guard resets the
-                    // narrowed type of 'y' to its declared type.
-                    if (containsMatchingReference(reference, left)) {
-                        return declaredType;
-                    }
-                    return type;
-                }
-                // Check that right operand is a function type with a prototype property
-                var rightType = checkExpression(expr.right);
-                if (!isTypeSubtypeOf(rightType, globalFunctionType)) {
-                    return type;
-                }
-                var targetType;
-                var prototypeProperty = getPropertyOfType(rightType, "prototype");
-                if (prototypeProperty) {
-                    // Target type is type of the prototype property
-                    var prototypePropertyType = getTypeOfSymbol(prototypeProperty);
-                    if (!isTypeAny(prototypePropertyType)) {
-                        targetType = prototypePropertyType;
-                    }
-                }
-                // Don't narrow from 'any' if the target type is exactly 'Object' or 'Function'
-                if (isTypeAny(type) && (targetType === globalObjectType || targetType === globalFunctionType)) {
-                    return type;
-                }
-                if (!targetType) {
-                    // Target type is type of construct signature
-                    var constructSignatures = void 0;
-                    if (rightType.flags & 65536 /* Interface */) {
-                        constructSignatures = resolveDeclaredMembers(rightType).declaredConstructSignatures;
-                    }
-                    else if (rightType.flags & 2097152 /* Anonymous */) {
-                        constructSignatures = getSignaturesOfType(rightType, 1 /* Construct */);
-                    }
-                    if (constructSignatures && constructSignatures.length) {
-                        targetType = getUnionType(ts.map(constructSignatures, function (signature) { return getReturnTypeOfSignature(getErasedSignature(signature)); }));
-                    }
-                }
-                if (targetType) {
-                    return getNarrowedType(type, targetType, assumeTrue);
-                }
-                return type;
+            else if (container.kind === 152 /* Constructor */) {
+                var symbol = getSymbolOfNode(container.parent);
+                return getTypeOfSymbol(symbol);
             }
-            function getNarrowedType(type, candidate, assumeTrue) {
-                if (!assumeTrue) {
-                    return filterType(type, function (t) { return !isTypeInstanceOf(t, candidate); });
-                }
-                // If the current type is a union type, remove all constituents that couldn't be instances of
-                // the candidate type. If one or more constituents remain, return a union of those.
-                if (type.flags & 524288 /* Union */) {
-                    var assignableType = filterType(type, function (t) { return isTypeInstanceOf(t, candidate); });
-                    if (!(assignableType.flags & 8192 /* Never */)) {
-                        return assignableType;
-                    }
-                }
-                // If the candidate type is a subtype of the target type, narrow to the candidate type.
-                // Otherwise, if the target type is assignable to the candidate type, keep the target type.
-                // Otherwise, if the candidate type is assignable to the target type, narrow to the candidate
-                // type. Otherwise, the types are completely unrelated, so narrow to an intersection of the
-                // two types.
-                var targetType = type.flags & 16384 /* TypeParameter */ ? getApparentType(type) : type;
-                return isTypeSubtypeOf(candidate, type) ? candidate :
-                    isTypeAssignableTo(type, candidate) ? type :
-                        isTypeAssignableTo(candidate, targetType) ? candidate :
-                            getIntersectionType([type, candidate]);
+            else {
+                var symbol = getSymbolOfNode(container);
+                return getTypeOfSymbol(symbol);
             }
-            function narrowTypeByTypePredicate(type, callExpression, assumeTrue) {
-                if (!hasMatchingArgument(callExpression, reference)) {
-                    return type;
-                }
-                var signature = getResolvedSignature(callExpression);
-                var predicate = signature.typePredicate;
-                if (!predicate) {
-                    return type;
-                }
-                // Don't narrow from 'any' if the predicate type is exactly 'Object' or 'Function'
-                if (isTypeAny(type) && (predicate.type === globalObjectType || predicate.type === globalFunctionType)) {
-                    return type;
-                }
-                if (ts.isIdentifierTypePredicate(predicate)) {
-                    var predicateArgument = callExpression.arguments[predicate.parameterIndex];
-                    if (predicateArgument) {
-                        if (isMatchingReference(reference, predicateArgument)) {
-                            return getNarrowedType(type, predicate.type, assumeTrue);
-                        }
-                        if (containsMatchingReference(reference, predicateArgument)) {
-                            return declaredType;
-                        }
+        }
+        function getTypeOfParameter(symbol) {
+            var type = getTypeOfSymbol(symbol);
+            if (strictNullChecks) {
+                var declaration = symbol.valueDeclaration;
+                if (declaration && declaration.initializer) {
+                    return getNullableType(type, 2048 /* Undefined */);
+                }
+            }
+            return type;
+        }
+        function getTypeAtPosition(signature, pos) {
+            return signature.hasRestParameter ?
+                pos < signature.parameters.length - 1 ? getTypeOfParameter(signature.parameters[pos]) : getRestTypeOfSignature(signature) :
+                pos < signature.parameters.length ? getTypeOfParameter(signature.parameters[pos]) : anyType;
+        }
+        function getTypeOfFirstParameterOfSignature(signature) {
+            return signature.parameters.length > 0 ? getTypeAtPosition(signature, 0) : neverType;
+        }
+        function inferFromAnnotatedParameters(signature, context, mapper) {
+            var len = signature.parameters.length - (signature.hasRestParameter ? 1 : 0);
+            for (var i = 0; i < len; i++) {
+                var declaration = signature.parameters[i].valueDeclaration;
+                if (declaration.type) {
+                    var typeNode = ts.getEffectiveTypeAnnotationNode(declaration);
+                    if (typeNode) {
+                        inferTypes(mapper.inferences, getTypeFromTypeNode(typeNode), getTypeAtPosition(context, i));
                     }
                 }
-                else {
-                    var invokedExpression = skipParenthesizedNodes(callExpression.expression);
-                    if (invokedExpression.kind === 173 /* ElementAccessExpression */ || invokedExpression.kind === 172 /* PropertyAccessExpression */) {
-                        var accessExpression = invokedExpression;
-                        var possibleReference = skipParenthesizedNodes(accessExpression.expression);
-                        if (isMatchingReference(reference, possibleReference)) {
-                            return getNarrowedType(type, predicate.type, assumeTrue);
-                        }
-                        if (containsMatchingReference(reference, possibleReference)) {
-                            return declaredType;
-                        }
+            }
+        }
+        function assignContextualParameterTypes(signature, context) {
+            signature.typeParameters = context.typeParameters;
+            if (context.thisParameter) {
+                var parameter = signature.thisParameter;
+                if (!parameter || parameter.valueDeclaration && !parameter.valueDeclaration.type) {
+                    if (!parameter) {
+                        signature.thisParameter = createSymbolWithType(context.thisParameter, /*type*/ undefined);
                     }
+                    assignTypeToParameterAndFixTypeParameters(signature.thisParameter, getTypeOfSymbol(context.thisParameter));
                 }
-                return type;
             }
-            // Narrow the given type based on the given expression having the assumed boolean value. The returned type
-            // will be a subtype or the same type as the argument.
-            function narrowType(type, expr, assumeTrue) {
-                switch (expr.kind) {
-                    case 69 /* Identifier */:
-                    case 97 /* ThisKeyword */:
-                    case 172 /* PropertyAccessExpression */:
-                        return narrowTypeByTruthiness(type, expr, assumeTrue);
-                    case 174 /* CallExpression */:
-                        return narrowTypeByTypePredicate(type, expr, assumeTrue);
-                    case 178 /* ParenthesizedExpression */:
-                        return narrowType(type, expr.expression, assumeTrue);
-                    case 187 /* BinaryExpression */:
-                        return narrowTypeByBinaryExpression(type, expr, assumeTrue);
-                    case 185 /* PrefixUnaryExpression */:
-                        if (expr.operator === 49 /* ExclamationToken */) {
-                            return narrowType(type, expr.operand, !assumeTrue);
-                        }
-                        break;
+            var len = signature.parameters.length - (signature.hasRestParameter ? 1 : 0);
+            for (var i = 0; i < len; i++) {
+                var parameter = signature.parameters[i];
+                if (!ts.getEffectiveTypeAnnotationNode(parameter.valueDeclaration)) {
+                    var contextualParameterType = getTypeAtPosition(context, i);
+                    assignTypeToParameterAndFixTypeParameters(parameter, contextualParameterType);
                 }
-                return type;
             }
-        }
-        function getTypeOfSymbolAtLocation(symbol, location) {
-            // If we have an identifier or a property access at the given location, if the location is
-            // an dotted name expression, and if the location is not an assignment target, obtain the type
-            // of the expression (which will reflect control flow analysis). If the expression indeed
-            // resolved to the given symbol, return the narrowed type.
-            if (location.kind === 69 /* Identifier */) {
-                if (ts.isRightSideOfQualifiedNameOrPropertyAccess(location)) {
-                    location = location.parent;
+            if (signature.hasRestParameter && isRestParameterIndex(context, signature.parameters.length - 1)) {
+                var parameter = ts.lastOrUndefined(signature.parameters);
+                if (!ts.getEffectiveTypeAnnotationNode(parameter.valueDeclaration)) {
+                    var contextualParameterType = getTypeOfSymbol(ts.lastOrUndefined(context.parameters));
+                    assignTypeToParameterAndFixTypeParameters(parameter, contextualParameterType);
                 }
-                if (ts.isExpression(location) && !ts.isAssignmentTarget(location)) {
-                    var type = checkExpression(location);
-                    if (getExportSymbolOfValueSymbolIfExported(getNodeLinks(location).resolvedSymbol) === symbol) {
-                        return type;
+            }
+        }
+        // When contextual typing assigns a type to a parameter that contains a binding pattern, we also need to push
+        // the destructured type into the contained binding elements.
+        function assignBindingElementTypes(node) {
+            if (ts.isBindingPattern(node.name)) {
+                for (var _i = 0, _a = node.name.elements; _i < _a.length; _i++) {
+                    var element = _a[_i];
+                    if (!ts.isOmittedExpression(element)) {
+                        if (element.name.kind === 71 /* Identifier */) {
+                            getSymbolLinks(getSymbolOfNode(element)).type = getTypeForBindingElement(element);
+                        }
+                        assignBindingElementTypes(element);
                     }
                 }
             }
-            // The location isn't a reference to the given symbol, meaning we're being asked
-            // a hypothetical question of what type the symbol would have if there was a reference
-            // to it at the given location. Since we have no control flow information for the
-            // hypothetical reference (control flow information is created and attached by the
-            // binder), we simply return the declared type of the symbol.
-            return getTypeOfSymbol(symbol);
         }
-        function skipParenthesizedNodes(expression) {
-            while (expression.kind === 178 /* ParenthesizedExpression */) {
-                expression = expression.expression;
+        function assignTypeToParameterAndFixTypeParameters(parameter, contextualType) {
+            var links = getSymbolLinks(parameter);
+            if (!links.type) {
+                links.type = contextualType;
+                var name_22 = ts.getNameOfDeclaration(parameter.valueDeclaration);
+                // if inference didn't come up with anything but {}, fall back to the binding pattern if present.
+                if (links.type === emptyObjectType &&
+                    (name_22.kind === 174 /* ObjectBindingPattern */ || name_22.kind === 175 /* ArrayBindingPattern */)) {
+                    links.type = getTypeFromBindingPattern(name_22);
+                }
+                assignBindingElementTypes(parameter.valueDeclaration);
             }
-            return expression;
         }
-        function getControlFlowContainer(node) {
-            while (true) {
-                node = node.parent;
-                if (ts.isFunctionLike(node) && !ts.getImmediatelyInvokedFunctionExpression(node) ||
-                    node.kind === 226 /* ModuleBlock */ ||
-                    node.kind === 256 /* SourceFile */ ||
-                    node.kind === 145 /* PropertyDeclaration */) {
-                    return node;
-                }
+        function createPromiseType(promisedType) {
+            // creates a `Promise<T>` type where `T` is the promisedType argument
+            var globalPromiseType = getGlobalPromiseType(/*reportErrors*/ true);
+            if (globalPromiseType !== emptyGenericType) {
+                // if the promised type is itself a promise, get the underlying type; otherwise, fallback to the promised type
+                promisedType = getAwaitedType(promisedType) || emptyObjectType;
+                return createTypeReference(globalPromiseType, [promisedType]);
             }
+            return emptyObjectType;
         }
-        // Check if a parameter is assigned anywhere within its declaring function.
-        function isParameterAssigned(symbol) {
-            var func = ts.getRootDeclaration(symbol.valueDeclaration).parent;
-            var links = getNodeLinks(func);
-            if (!(links.flags & 4194304 /* AssignmentsMarked */)) {
-                links.flags |= 4194304 /* AssignmentsMarked */;
-                if (!hasParentWithAssignmentsMarked(func)) {
-                    markParameterAssignments(func);
-                }
+        function createPromiseReturnType(func, promisedType) {
+            var promiseType = createPromiseType(promisedType);
+            if (promiseType === emptyObjectType) {
+                error(func, ts.isImportCall(func) ?
+                    ts.Diagnostics.A_dynamic_import_call_returns_a_Promise_Make_sure_you_have_a_declaration_for_Promise_or_include_ES2015_in_your_lib_option :
+                    ts.Diagnostics.An_async_function_or_method_must_return_a_Promise_Make_sure_you_have_a_declaration_for_Promise_or_include_ES2015_in_your_lib_option);
+                return unknownType;
             }
-            return symbol.isAssigned || false;
+            else if (!getGlobalPromiseConstructorSymbol(/*reportErrors*/ true)) {
+                error(func, ts.isImportCall(func) ?
+                    ts.Diagnostics.A_dynamic_import_call_in_ES5_SlashES3_requires_the_Promise_constructor_Make_sure_you_have_a_declaration_for_the_Promise_constructor_or_include_ES2015_in_your_lib_option :
+                    ts.Diagnostics.An_async_function_or_method_in_ES5_SlashES3_requires_the_Promise_constructor_Make_sure_you_have_a_declaration_for_the_Promise_constructor_or_include_ES2015_in_your_lib_option);
+            }
+            return promiseType;
         }
-        function hasParentWithAssignmentsMarked(node) {
-            while (true) {
-                node = node.parent;
-                if (!node) {
-                    return false;
+        function getReturnTypeFromBody(func, checkMode) {
+            var contextualSignature = getContextualSignatureForFunctionLikeDeclaration(func);
+            if (!func.body) {
+                return unknownType;
+            }
+            var functionFlags = ts.getFunctionFlags(func);
+            var type;
+            if (func.body.kind !== 207 /* Block */) {
+                type = checkExpressionCached(func.body, checkMode);
+                if (functionFlags & 2 /* Async */) {
+                    // From within an async function you can return either a non-promise value or a promise. Any
+                    // Promise/A+ compatible implementation will always assimilate any foreign promise, so the
+                    // return type of the body should be unwrapped to its awaited type, which we will wrap in
+                    // the native Promise<T> type later in this function.
+                    type = checkAwaitedType(type, /*errorNode*/ func, ts.Diagnostics.The_return_type_of_an_async_function_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member);
                 }
-                if (ts.isFunctionLike(node) && getNodeLinks(node).flags & 4194304 /* AssignmentsMarked */) {
-                    return true;
+            }
+            else {
+                var types = void 0;
+                if (functionFlags & 1 /* Generator */) {
+                    types = ts.concatenate(checkAndAggregateYieldOperandTypes(func, checkMode), checkAndAggregateReturnExpressionTypes(func, checkMode));
+                    if (!types || types.length === 0) {
+                        var iterableIteratorAny = functionFlags & 2 /* Async */
+                            ? createAsyncIterableIteratorType(anyType) // AsyncGenerator function
+                            : createIterableIteratorType(anyType); // Generator function
+                        if (noImplicitAny) {
+                            error(func.asteriskToken, ts.Diagnostics.Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_type, typeToString(iterableIteratorAny));
+                        }
+                        return iterableIteratorAny;
+                    }
+                }
+                else {
+                    types = checkAndAggregateReturnExpressionTypes(func, checkMode);
+                    if (!types) {
+                        // For an async function, the return type will not be never, but rather a Promise for never.
+                        return functionFlags & 2 /* Async */
+                            ? createPromiseReturnType(func, neverType) // Async function
+                            : neverType; // Normal function
+                    }
+                    if (types.length === 0) {
+                        // For an async function, the return type will not be void, but rather a Promise for void.
+                        return functionFlags & 2 /* Async */
+                            ? createPromiseReturnType(func, voidType) // Async function
+                            : voidType; // Normal function
+                    }
+                }
+                // Return a union of the return expression types.
+                type = getUnionType(types, /*subtypeReduction*/ true);
+                if (functionFlags & 1 /* Generator */) {
+                    type = functionFlags & 2 /* Async */
+                        ? createAsyncIterableIteratorType(type) // AsyncGenerator function
+                        : createIterableIteratorType(type); // Generator function
                 }
             }
+            if (!contextualSignature) {
+                reportErrorsFromWidening(func, type);
+            }
+            if (isUnitType(type) &&
+                !(contextualSignature &&
+                    isLiteralContextualType(contextualSignature === getSignatureFromDeclaration(func) ? type : getReturnTypeOfSignature(contextualSignature)))) {
+                type = getWidenedLiteralType(type);
+            }
+            var widenedType = getWidenedType(type);
+            // From within an async function you can return either a non-promise value or a promise. Any
+            // Promise/A+ compatible implementation will always assimilate any foreign promise, so the
+            // return type of the body is awaited type of the body, wrapped in a native Promise<T> type.
+            return (functionFlags & 3 /* AsyncGenerator */) === 2 /* Async */
+                ? createPromiseReturnType(func, widenedType) // Async function
+                : widenedType; // Generator function, AsyncGenerator function, or normal function
         }
-        function markParameterAssignments(node) {
-            if (node.kind === 69 /* Identifier */) {
-                if (ts.isAssignmentTarget(node)) {
-                    var symbol = getResolvedSymbol(node);
-                    if (symbol.valueDeclaration && ts.getRootDeclaration(symbol.valueDeclaration).kind === 142 /* Parameter */) {
-                        symbol.isAssigned = true;
+        function checkAndAggregateYieldOperandTypes(func, checkMode) {
+            var aggregatedTypes = [];
+            var functionFlags = ts.getFunctionFlags(func);
+            ts.forEachYieldExpression(func.body, function (yieldExpression) {
+                var expr = yieldExpression.expression;
+                if (expr) {
+                    var type = checkExpressionCached(expr, checkMode);
+                    if (yieldExpression.asteriskToken) {
+                        // A yield* expression effectively yields everything that its operand yields
+                        type = checkIteratedTypeOrElementType(type, yieldExpression.expression, /*allowStringInput*/ false, (functionFlags & 2 /* Async */) !== 0);
+                    }
+                    if (functionFlags & 2 /* Async */) {
+                        type = checkAwaitedType(type, expr, yieldExpression.asteriskToken
+                            ? ts.Diagnostics.Type_of_iterated_elements_of_a_yield_Asterisk_operand_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member
+                            : ts.Diagnostics.Type_of_yield_operand_in_an_async_generator_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member);
+                    }
+                    if (!ts.contains(aggregatedTypes, type)) {
+                        aggregatedTypes.push(type);
                     }
                 }
+            });
+            return aggregatedTypes;
+        }
+        function isExhaustiveSwitchStatement(node) {
+            if (!node.possiblyExhaustive) {
+                return false;
             }
-            else {
-                ts.forEachChild(node, markParameterAssignments);
+            var type = getTypeOfExpression(node.expression);
+            if (!isLiteralType(type)) {
+                return false;
+            }
+            var switchTypes = getSwitchClauseTypes(node);
+            if (!switchTypes.length) {
+                return false;
             }
+            return eachTypeContainedIn(mapType(type, getRegularTypeOfLiteralType), switchTypes);
         }
-        function checkIdentifier(node) {
-            var symbol = getResolvedSymbol(node);
-            // As noted in ECMAScript 6 language spec, arrow functions never have an arguments objects.
-            // Although in down-level emit of arrow function, we emit it using function expression which means that
-            // arguments objects will be bound to the inner object; emitting arrow function natively in ES6, arguments objects
-            // will be bound to non-arrow function that contain this arrow function. This results in inconsistent behavior.
-            // To avoid that we will give an error to users if they use arguments objects in arrow function so that they
-            // can explicitly bound arguments objects
-            if (symbol === argumentsSymbol) {
-                var container = ts.getContainingFunction(node);
-                if (languageVersion < 2 /* ES6 */) {
-                    if (container.kind === 180 /* ArrowFunction */) {
-                        error(node, ts.Diagnostics.The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_standard_function_expression);
+        function functionHasImplicitReturn(func) {
+            if (!(func.flags & 128 /* HasImplicitReturn */)) {
+                return false;
+            }
+            var lastStatement = ts.lastOrUndefined(func.body.statements);
+            if (lastStatement && lastStatement.kind === 221 /* SwitchStatement */ && isExhaustiveSwitchStatement(lastStatement)) {
+                return false;
+            }
+            return true;
+        }
+        function checkAndAggregateReturnExpressionTypes(func, checkMode) {
+            var functionFlags = ts.getFunctionFlags(func);
+            var aggregatedTypes = [];
+            var hasReturnWithNoExpression = functionHasImplicitReturn(func);
+            var hasReturnOfTypeNever = false;
+            ts.forEachReturnStatement(func.body, function (returnStatement) {
+                var expr = returnStatement.expression;
+                if (expr) {
+                    var type = checkExpressionCached(expr, checkMode);
+                    if (functionFlags & 2 /* Async */) {
+                        // From within an async function you can return either a non-promise value or a promise. Any
+                        // Promise/A+ compatible implementation will always assimilate any foreign promise, so the
+                        // return type of the body should be unwrapped to its awaited type, which should be wrapped in
+                        // the native Promise<T> type by the caller.
+                        type = checkAwaitedType(type, func, ts.Diagnostics.The_return_type_of_an_async_function_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member);
                     }
-                    else if (ts.hasModifier(container, 256 /* Async */)) {
-                        error(node, ts.Diagnostics.The_arguments_object_cannot_be_referenced_in_an_async_function_or_method_in_ES3_and_ES5_Consider_using_a_standard_function_or_method);
+                    if (type.flags & 8192 /* Never */) {
+                        hasReturnOfTypeNever = true;
+                    }
+                    else if (!ts.contains(aggregatedTypes, type)) {
+                        aggregatedTypes.push(type);
                     }
                 }
-                if (node.flags & 262144 /* AwaitContext */) {
-                    getNodeLinks(container).flags |= 8192 /* CaptureArguments */;
+                else {
+                    hasReturnWithNoExpression = true;
                 }
+            });
+            if (aggregatedTypes.length === 0 && !hasReturnWithNoExpression && (hasReturnOfTypeNever ||
+                func.kind === 186 /* FunctionExpression */ || func.kind === 187 /* ArrowFunction */)) {
+                return undefined;
             }
-            if (symbol.flags & 8388608 /* Alias */ && !isInTypeQuery(node) && !isConstEnumOrConstEnumOnlyModule(resolveAlias(symbol))) {
-                markAliasSymbolAsReferenced(symbol);
+            if (strictNullChecks && aggregatedTypes.length && hasReturnWithNoExpression) {
+                if (!ts.contains(aggregatedTypes, undefinedType)) {
+                    aggregatedTypes.push(undefinedType);
+                }
             }
-            var localOrExportSymbol = getExportSymbolOfValueSymbolIfExported(symbol);
-            if (localOrExportSymbol.flags & 32 /* Class */) {
-                var declaration_1 = localOrExportSymbol.valueDeclaration;
-                // Due to the emit for class decorators, any reference to the class from inside of the class body
-                // must instead be rewritten to point to a temporary variable to avoid issues with the double-bind
-                // behavior of class names in ES6.
-                if (languageVersion === 2 /* ES6 */
-                    && declaration_1.kind === 221 /* ClassDeclaration */
-                    && ts.nodeIsDecorated(declaration_1)) {
-                    var container = ts.getContainingClass(node);
-                    while (container !== undefined) {
-                        if (container === declaration_1 && container.name !== node) {
-                            getNodeLinks(declaration_1).flags |= 8388608 /* ClassWithConstructorReference */;
-                            getNodeLinks(node).flags |= 16777216 /* ConstructorReferenceInClass */;
-                            break;
-                        }
-                        container = ts.getContainingClass(container);
+            return aggregatedTypes;
+        }
+        /**
+         * TypeScript Specification 1.0 (6.3) - July 2014
+         *   An explicitly typed function whose return type isn't the Void type,
+         *   the Any type, or a union type containing the Void or Any type as a constituent
+         *   must have at least one return statement somewhere in its body.
+         *   An exception to this rule is if the function implementation consists of a single 'throw' statement.
+         *
+         * @param returnType - return type of the function, can be undefined if return type is not explicitly specified
+         */
+        function checkAllCodePathsInNonVoidFunctionReturnOrThrow(func, returnType) {
+            if (!produceDiagnostics) {
+                return;
+            }
+            // Functions with with an explicitly specified 'void' or 'any' return type don't need any return expressions.
+            if (returnType && maybeTypeOfKind(returnType, 1 /* Any */ | 1024 /* Void */)) {
+                return;
+            }
+            // If all we have is a function signature, or an arrow function with an expression body, then there is nothing to check.
+            // also if HasImplicitReturn flag is not set this means that all codepaths in function body end with return or throw
+            if (ts.nodeIsMissing(func.body) || func.body.kind !== 207 /* Block */ || !functionHasImplicitReturn(func)) {
+                return;
+            }
+            var hasExplicitReturn = func.flags & 256 /* HasExplicitReturn */;
+            if (returnType && returnType.flags & 8192 /* Never */) {
+                error(ts.getEffectiveReturnTypeNode(func), ts.Diagnostics.A_function_returning_never_cannot_have_a_reachable_end_point);
+            }
+            else if (returnType && !hasExplicitReturn) {
+                // minimal check: function has syntactic return type annotation and no explicit return statements in the body
+                // this function does not conform to the specification.
+                // NOTE: having returnType !== undefined is a precondition for entering this branch so func.type will always be present
+                error(ts.getEffectiveReturnTypeNode(func), ts.Diagnostics.A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value);
+            }
+            else if (returnType && strictNullChecks && !isTypeAssignableTo(undefinedType, returnType)) {
+                error(ts.getEffectiveReturnTypeNode(func), ts.Diagnostics.Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined);
+            }
+            else if (compilerOptions.noImplicitReturns) {
+                if (!returnType) {
+                    // If return type annotation is omitted check if function has any explicit return statements.
+                    // If it does not have any - its inferred return type is void - don't do any checks.
+                    // Otherwise get inferred return type from function body and report error only if it is not void / anytype
+                    if (!hasExplicitReturn) {
+                        return;
+                    }
+                    var inferredReturnType = getReturnTypeOfSignature(getSignatureFromDeclaration(func));
+                    if (isUnwrappedReturnTypeVoidOrAny(func, inferredReturnType)) {
+                        return;
                     }
                 }
-                else if (declaration_1.kind === 192 /* ClassExpression */) {
-                    // When we emit a class expression with static members that contain a reference
-                    // to the constructor in the initializer, we will need to substitute that
-                    // binding with an alias as the class name is not in scope.
-                    var container = ts.getThisContainer(node, /*includeArrowFunctions*/ false);
-                    while (container !== undefined) {
-                        if (container.parent === declaration_1) {
-                            if (container.kind === 145 /* PropertyDeclaration */ && ts.hasModifier(container, 32 /* Static */)) {
-                                getNodeLinks(declaration_1).flags |= 8388608 /* ClassWithConstructorReference */;
-                                getNodeLinks(node).flags |= 16777216 /* ConstructorReferenceInClass */;
+                error(ts.getEffectiveReturnTypeNode(func) || func, ts.Diagnostics.Not_all_code_paths_return_a_value);
+            }
+        }
+        function checkFunctionExpressionOrObjectLiteralMethod(node, checkMode) {
+            ts.Debug.assert(node.kind !== 151 /* MethodDeclaration */ || ts.isObjectLiteralMethod(node));
+            // Grammar checking
+            var hasGrammarError = checkGrammarFunctionLikeDeclaration(node);
+            if (!hasGrammarError && node.kind === 186 /* FunctionExpression */) {
+                checkGrammarForGenerator(node);
+            }
+            // The identityMapper object is used to indicate that function expressions are wildcards
+            if (checkMode === 1 /* SkipContextSensitive */ && isContextSensitive(node)) {
+                checkNodeDeferred(node);
+                return anyFunctionType;
+            }
+            var links = getNodeLinks(node);
+            var type = getTypeOfSymbol(node.symbol);
+            // Check if function expression is contextually typed and assign parameter types if so.
+            if (!(links.flags & 1024 /* ContextChecked */)) {
+                var contextualSignature = getContextualSignature(node);
+                // If a type check is started at a function expression that is an argument of a function call, obtaining the
+                // contextual type may recursively get back to here during overload resolution of the call. If so, we will have
+                // already assigned contextual types.
+                if (!(links.flags & 1024 /* ContextChecked */)) {
+                    links.flags |= 1024 /* ContextChecked */;
+                    if (contextualSignature) {
+                        var signature = getSignaturesOfType(type, 0 /* Call */)[0];
+                        if (isContextSensitive(node)) {
+                            var contextualMapper = getContextualMapper(node);
+                            if (checkMode === 2 /* Inferential */) {
+                                inferFromAnnotatedParameters(signature, contextualSignature, contextualMapper);
+                            }
+                            var instantiatedContextualSignature = contextualMapper === identityMapper ?
+                                contextualSignature : instantiateSignature(contextualSignature, contextualMapper);
+                            assignContextualParameterTypes(signature, instantiatedContextualSignature);
+                        }
+                        if (!ts.getEffectiveReturnTypeNode(node) && !signature.resolvedReturnType) {
+                            var returnType = getReturnTypeFromBody(node, checkMode);
+                            if (!signature.resolvedReturnType) {
+                                signature.resolvedReturnType = returnType;
                             }
-                            break;
                         }
-                        container = ts.getThisContainer(container, /*includeArrowFunctions*/ false);
                     }
+                    checkSignatureDeclaration(node);
+                    checkNodeDeferred(node);
                 }
             }
-            checkCollisionWithCapturedSuperVariable(node, node);
-            checkCollisionWithCapturedThisVariable(node, node);
-            checkNestedBlockScopedBinding(node, symbol);
-            var type = getTypeOfSymbol(localOrExportSymbol);
-            var declaration = localOrExportSymbol.valueDeclaration;
-            // We only narrow variables and parameters occurring in a non-assignment position. For all other
-            // entities we simply return the declared type.
-            if (!(localOrExportSymbol.flags & 3 /* Variable */) || ts.isAssignmentTarget(node) || !declaration) {
-                return type;
-            }
-            // The declaration container is the innermost function that encloses the declaration of the variable
-            // or parameter. The flow container is the innermost function starting with which we analyze the control
-            // flow graph to determine the control flow based type.
-            var isParameter = ts.getRootDeclaration(declaration).kind === 142 /* Parameter */;
-            var declarationContainer = getControlFlowContainer(declaration);
-            var flowContainer = getControlFlowContainer(node);
-            var isOuterVariable = flowContainer !== declarationContainer;
-            // When the control flow originates in a function expression or arrow function and we are referencing
-            // a const variable or parameter from an outer function, we extend the origin of the control flow
-            // analysis to include the immediately enclosing function.
-            while (flowContainer !== declarationContainer &&
-                (flowContainer.kind === 179 /* FunctionExpression */ || flowContainer.kind === 180 /* ArrowFunction */) &&
-                (isReadonlySymbol(localOrExportSymbol) || isParameter && !isParameterAssigned(localOrExportSymbol))) {
-                flowContainer = getControlFlowContainer(flowContainer);
-            }
-            // We only look for uninitialized variables in strict null checking mode, and only when we can analyze
-            // the entire control flow graph from the variable's declaration (i.e. when the flow container and
-            // declaration container are the same).
-            var assumeInitialized = !strictNullChecks || (type.flags & 1 /* Any */) !== 0 || isParameter ||
-                isOuterVariable || ts.isInAmbientContext(declaration);
-            var flowType = getFlowTypeOfReference(node, type, assumeInitialized, flowContainer);
-            // A variable is considered uninitialized when it is possible to analyze the entire control flow graph
-            // from declaration to use, and when the variable's declared type doesn't include undefined but the
-            // control flow based type does include undefined.
-            if (!assumeInitialized && !(getFalsyFlags(type) & 2048 /* Undefined */) && getFalsyFlags(flowType) & 2048 /* Undefined */) {
-                error(node, ts.Diagnostics.Variable_0_is_used_before_being_assigned, symbolToString(symbol));
-                // Return the declared type to reduce follow-on errors
-                return type;
+            if (produceDiagnostics && node.kind !== 151 /* MethodDeclaration */) {
+                checkCollisionWithCapturedSuperVariable(node, node.name);
+                checkCollisionWithCapturedThisVariable(node, node.name);
+                checkCollisionWithCapturedNewTargetVariable(node, node.name);
             }
-            return flowType;
+            return type;
         }
-        function isInsideFunction(node, threshold) {
-            var current = node;
-            while (current && current !== threshold) {
-                if (ts.isFunctionLike(current)) {
-                    return true;
+        function checkFunctionExpressionOrObjectLiteralMethodDeferred(node) {
+            ts.Debug.assert(node.kind !== 151 /* MethodDeclaration */ || ts.isObjectLiteralMethod(node));
+            var functionFlags = ts.getFunctionFlags(node);
+            var returnTypeNode = ts.getEffectiveReturnTypeNode(node);
+            var returnOrPromisedType = returnTypeNode &&
+                ((functionFlags & 3 /* AsyncGenerator */) === 2 /* Async */ ?
+                    checkAsyncFunctionReturnType(node) :
+                    getTypeFromTypeNode(returnTypeNode)); // AsyncGenerator function, Generator function, or normal function
+            if ((functionFlags & 1 /* Generator */) === 0) {
+                // return is not necessary in the body of generators
+                checkAllCodePathsInNonVoidFunctionReturnOrThrow(node, returnOrPromisedType);
+            }
+            if (node.body) {
+                if (!returnTypeNode) {
+                    // There are some checks that are only performed in getReturnTypeFromBody, that may produce errors
+                    // we need. An example is the noImplicitAny errors resulting from widening the return expression
+                    // of a function. Because checking of function expression bodies is deferred, there was never an
+                    // appropriate time to do this during the main walk of the file (see the comment at the top of
+                    // checkFunctionExpressionBodies). So it must be done now.
+                    getReturnTypeOfSignature(getSignatureFromDeclaration(node));
                 }
-                current = current.parent;
+                if (node.body.kind === 207 /* Block */) {
+                    checkSourceElement(node.body);
+                }
+                else {
+                    // From within an async function you can return either a non-promise value or a promise. Any
+                    // Promise/A+ compatible implementation will always assimilate any foreign promise, so we
+                    // should not be checking assignability of a promise to the return type. Instead, we need to
+                    // check assignability of the awaited type of the expression body against the promised type of
+                    // its return type annotation.
+                    var exprType = checkExpression(node.body);
+                    if (returnOrPromisedType) {
+                        if ((functionFlags & 3 /* AsyncGenerator */) === 2 /* Async */) {
+                            var awaitedType = checkAwaitedType(exprType, node.body, ts.Diagnostics.The_return_type_of_an_async_function_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member);
+                            checkTypeAssignableTo(awaitedType, returnOrPromisedType, node.body);
+                        }
+                        else {
+                            checkTypeAssignableTo(exprType, returnOrPromisedType, node.body);
+                        }
+                    }
+                }
+                registerForUnusedIdentifiersCheck(node);
             }
-            return false;
         }
-        function checkNestedBlockScopedBinding(node, symbol) {
-            if (languageVersion >= 2 /* ES6 */ ||
-                (symbol.flags & (2 /* BlockScopedVariable */ | 32 /* Class */)) === 0 ||
-                symbol.valueDeclaration.parent.kind === 252 /* CatchClause */) {
-                return;
+        function checkArithmeticOperandType(operand, type, diagnostic) {
+            if (!isTypeAnyOrAllConstituentTypesHaveKind(type, 84 /* NumberLike */)) {
+                error(operand, diagnostic);
+                return false;
             }
-            // 1. walk from the use site up to the declaration and check
-            // if there is anything function like between declaration and use-site (is binding/class is captured in function).
-            // 2. walk from the declaration up to the boundary of lexical environment and check
-            // if there is an iteration statement in between declaration and boundary (is binding/class declared inside iteration statement)
-            var container = ts.getEnclosingBlockScopeContainer(symbol.valueDeclaration);
-            var usedInFunction = isInsideFunction(node.parent, container);
-            var current = container;
-            var containedInIterationStatement = false;
-            while (current && !ts.nodeStartsNewLexicalEnvironment(current)) {
-                if (ts.isIterationStatement(current, /*lookInLabeledStatements*/ false)) {
-                    containedInIterationStatement = true;
-                    break;
+            return true;
+        }
+        function isReadonlySymbol(symbol) {
+            // The following symbols are considered read-only:
+            // Properties with a 'readonly' modifier
+            // Variables declared with 'const'
+            // Get accessors without matching set accessors
+            // Enum members
+            // Unions and intersections of the above (unions and intersections eagerly set isReadonly on creation)
+            return !!(ts.getCheckFlags(symbol) & 8 /* Readonly */ ||
+                symbol.flags & 4 /* Property */ && ts.getDeclarationModifierFlagsFromSymbol(symbol) & 64 /* Readonly */ ||
+                symbol.flags & 3 /* Variable */ && getDeclarationNodeFlagsFromSymbol(symbol) & 2 /* Const */ ||
+                symbol.flags & 98304 /* Accessor */ && !(symbol.flags & 65536 /* SetAccessor */) ||
+                symbol.flags & 8 /* EnumMember */);
+        }
+        function isReferenceToReadonlyEntity(expr, symbol) {
+            if (isReadonlySymbol(symbol)) {
+                // Allow assignments to readonly properties within constructors of the same class declaration.
+                if (symbol.flags & 4 /* Property */ &&
+                    (expr.kind === 179 /* PropertyAccessExpression */ || expr.kind === 180 /* ElementAccessExpression */) &&
+                    expr.expression.kind === 99 /* ThisKeyword */) {
+                    // Look for if this is the constructor for the class that `symbol` is a property of.
+                    var func = ts.getContainingFunction(expr);
+                    if (!(func && func.kind === 152 /* Constructor */)) {
+                        return true;
+                    }
+                    // If func.parent is a class and symbol is a (readonly) property of that class, or
+                    // if func is a constructor and symbol is a (readonly) parameter property declared in it,
+                    // then symbol is writeable here.
+                    return !(func.parent === symbol.valueDeclaration.parent || func === symbol.valueDeclaration.parent);
                 }
-                current = current.parent;
+                return true;
             }
-            if (containedInIterationStatement) {
-                if (usedInFunction) {
-                    // mark iteration statement as containing block-scoped binding captured in some function
-                    getNodeLinks(current).flags |= 65536 /* LoopWithCapturedBlockScopedBinding */;
-                }
-                // mark variables that are declared in loop initializer and reassigned inside the body of ForStatement.
-                // if body of ForStatement will be converted to function then we'll need a extra machinery to propagate reassigned values back.
-                if (container.kind === 206 /* ForStatement */ &&
-                    ts.getAncestor(symbol.valueDeclaration, 219 /* VariableDeclarationList */).parent === container &&
-                    isAssignedInBodyOfForStatement(node, container)) {
-                    getNodeLinks(symbol.valueDeclaration).flags |= 2097152 /* NeedsLoopOutParameter */;
+            return false;
+        }
+        function isReferenceThroughNamespaceImport(expr) {
+            if (expr.kind === 179 /* PropertyAccessExpression */ || expr.kind === 180 /* ElementAccessExpression */) {
+                var node = ts.skipParentheses(expr.expression);
+                if (node.kind === 71 /* Identifier */) {
+                    var symbol = getNodeLinks(node).resolvedSymbol;
+                    if (symbol.flags & 8388608 /* Alias */) {
+                        var declaration = getDeclarationOfAliasSymbol(symbol);
+                        return declaration && declaration.kind === 240 /* NamespaceImport */;
+                    }
                 }
-                // set 'declared inside loop' bit on the block-scoped binding
-                getNodeLinks(symbol.valueDeclaration).flags |= 262144 /* BlockScopedBindingInLoop */;
-            }
-            if (usedInFunction) {
-                getNodeLinks(symbol.valueDeclaration).flags |= 131072 /* CapturedBlockScopedBinding */;
             }
+            return false;
         }
-        function isAssignedInBodyOfForStatement(node, container) {
-            var current = node;
-            // skip parenthesized nodes
-            while (current.parent.kind === 178 /* ParenthesizedExpression */) {
-                current = current.parent;
-            }
-            // check if node is used as LHS in some assignment expression
-            var isAssigned = false;
-            if (ts.isAssignmentTarget(current)) {
-                isAssigned = true;
+        function checkReferenceExpression(expr, invalidReferenceMessage) {
+            // References are combinations of identifiers, parentheses, and property accesses.
+            var node = ts.skipOuterExpressions(expr, 2 /* Assertions */ | 1 /* Parentheses */);
+            if (node.kind !== 71 /* Identifier */ && node.kind !== 179 /* PropertyAccessExpression */ && node.kind !== 180 /* ElementAccessExpression */) {
+                error(expr, invalidReferenceMessage);
+                return false;
             }
-            else if ((current.parent.kind === 185 /* PrefixUnaryExpression */ || current.parent.kind === 186 /* PostfixUnaryExpression */)) {
-                var expr = current.parent;
-                isAssigned = expr.operator === 41 /* PlusPlusToken */ || expr.operator === 42 /* MinusMinusToken */;
+            return true;
+        }
+        function checkDeleteExpression(node) {
+            checkExpression(node.expression);
+            var expr = ts.skipParentheses(node.expression);
+            if (expr.kind !== 179 /* PropertyAccessExpression */ && expr.kind !== 180 /* ElementAccessExpression */) {
+                error(expr, ts.Diagnostics.The_operand_of_a_delete_operator_must_be_a_property_reference);
+                return booleanType;
             }
-            if (!isAssigned) {
-                return false;
+            var links = getNodeLinks(expr);
+            var symbol = getExportSymbolOfValueSymbolIfExported(links.resolvedSymbol);
+            if (symbol && isReadonlySymbol(symbol)) {
+                error(expr, ts.Diagnostics.The_operand_of_a_delete_operator_cannot_be_a_read_only_property);
             }
-            // at this point we know that node is the target of assignment
-            // now check that modification happens inside the statement part of the ForStatement
-            while (current !== container) {
-                if (current === container.statement) {
-                    return true;
+            return booleanType;
+        }
+        function checkTypeOfExpression(node) {
+            checkExpression(node.expression);
+            return typeofType;
+        }
+        function checkVoidExpression(node) {
+            checkExpression(node.expression);
+            return undefinedWideningType;
+        }
+        function checkAwaitExpression(node) {
+            // Grammar checking
+            if (produceDiagnostics) {
+                if (!(node.flags & 16384 /* AwaitContext */)) {
+                    grammarErrorOnFirstToken(node, ts.Diagnostics.await_expression_is_only_allowed_within_an_async_function);
                 }
-                else {
-                    current = current.parent;
+                if (isInParameterInitializerBeforeContainingFunction(node)) {
+                    error(node, ts.Diagnostics.await_expressions_cannot_be_used_in_a_parameter_initializer);
                 }
             }
-            return false;
+            var operandType = checkExpression(node.expression);
+            return checkAwaitedType(operandType, node, ts.Diagnostics.Type_of_await_operand_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member);
         }
-        function captureLexicalThis(node, container) {
-            getNodeLinks(node).flags |= 2 /* LexicalThis */;
-            if (container.kind === 145 /* PropertyDeclaration */ || container.kind === 148 /* Constructor */) {
-                var classNode = container.parent;
-                getNodeLinks(classNode).flags |= 4 /* CaptureThis */;
+        function checkPrefixUnaryExpression(node) {
+            var operandType = checkExpression(node.operand);
+            if (operandType === silentNeverType) {
+                return silentNeverType;
             }
-            else {
-                getNodeLinks(container).flags |= 4 /* CaptureThis */;
+            if (node.operator === 38 /* MinusToken */ && node.operand.kind === 8 /* NumericLiteral */) {
+                return getFreshTypeOfLiteralType(getLiteralType(-node.operand.text));
+            }
+            switch (node.operator) {
+                case 37 /* PlusToken */:
+                case 38 /* MinusToken */:
+                case 52 /* TildeToken */:
+                    checkNonNullType(operandType, node.operand);
+                    if (maybeTypeOfKind(operandType, 512 /* ESSymbol */)) {
+                        error(node.operand, ts.Diagnostics.The_0_operator_cannot_be_applied_to_type_symbol, ts.tokenToString(node.operator));
+                    }
+                    return numberType;
+                case 51 /* ExclamationToken */:
+                    var facts = getTypeFacts(operandType) & (1048576 /* Truthy */ | 2097152 /* Falsy */);
+                    return facts === 1048576 /* Truthy */ ? falseType :
+                        facts === 2097152 /* Falsy */ ? trueType :
+                            booleanType;
+                case 43 /* PlusPlusToken */:
+                case 44 /* MinusMinusToken */:
+                    var ok = checkArithmeticOperandType(node.operand, checkNonNullType(operandType, node.operand), ts.Diagnostics.An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type);
+                    if (ok) {
+                        // run check only if former checks succeeded to avoid reporting cascading errors
+                        checkReferenceExpression(node.operand, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_or_a_property_access);
+                    }
+                    return numberType;
             }
+            return unknownType;
         }
-        function findFirstSuperCall(n) {
-            if (ts.isSuperCallExpression(n)) {
-                return n;
+        function checkPostfixUnaryExpression(node) {
+            var operandType = checkExpression(node.operand);
+            if (operandType === silentNeverType) {
+                return silentNeverType;
             }
-            else if (ts.isFunctionLike(n)) {
-                return undefined;
+            var ok = checkArithmeticOperandType(node.operand, checkNonNullType(operandType, node.operand), ts.Diagnostics.An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type);
+            if (ok) {
+                // run check only if former checks succeeded to avoid reporting cascading errors
+                checkReferenceExpression(node.operand, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_or_a_property_access);
             }
-            return ts.forEachChild(n, findFirstSuperCall);
+            return numberType;
         }
-        /**
-         * Return a cached result if super-statement is already found.
-         * Otherwise, find a super statement in a given constructor function and cache the result in the node-links of the constructor
-         *
-         * @param constructor constructor-function to look for super statement
-         */
-        function getSuperCallInConstructor(constructor) {
-            var links = getNodeLinks(constructor);
-            // Only trying to find super-call if we haven't yet tried to find one.  Once we try, we will record the result
-            if (links.hasSuperCall === undefined) {
-                links.superCall = findFirstSuperCall(constructor.body);
-                links.hasSuperCall = links.superCall ? true : false;
+        // Return true if type might be of the given kind. A union or intersection type might be of a given
+        // kind if at least one constituent type is of the given kind.
+        function maybeTypeOfKind(type, kind) {
+            if (type.flags & kind) {
+                return true;
             }
-            return links.superCall;
-        }
-        /**
-         * Check if the given class-declaration extends null then return true.
-         * Otherwise, return false
-         * @param classDecl a class declaration to check if it extends null
-         */
-        function classDeclarationExtendsNull(classDecl) {
-            var classSymbol = getSymbolOfNode(classDecl);
-            var classInstanceType = getDeclaredTypeOfSymbol(classSymbol);
-            var baseConstructorType = getBaseConstructorTypeOfClass(classInstanceType);
-            return baseConstructorType === nullWideningType;
-        }
-        function checkThisExpression(node) {
-            // Stop at the first arrow function so that we can
-            // tell whether 'this' needs to be captured.
-            var container = ts.getThisContainer(node, /* includeArrowFunctions */ true);
-            var needToCaptureLexicalThis = false;
-            if (container.kind === 148 /* Constructor */) {
-                var containingClassDecl = container.parent;
-                var baseTypeNode = ts.getClassExtendsHeritageClauseElement(containingClassDecl);
-                // If a containing class does not have extends clause or the class extends null
-                // skip checking whether super statement is called before "this" accessing.
-                if (baseTypeNode && !classDeclarationExtendsNull(containingClassDecl)) {
-                    var superCall = getSuperCallInConstructor(container);
-                    // We should give an error in the following cases:
-                    //      - No super-call
-                    //      - "this" is accessing before super-call.
-                    //          i.e super(this)
-                    //              this.x; super();
-                    // We want to make sure that super-call is done before accessing "this" so that
-                    // "this" is not accessed as a parameter of the super-call.
-                    if (!superCall || superCall.end > node.pos) {
-                        // In ES6, super inside constructor of class-declaration has to precede "this" accessing
-                        error(node, ts.Diagnostics.super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class);
+            if (type.flags & 196608 /* UnionOrIntersection */) {
+                var types = type.types;
+                for (var _i = 0, types_17 = types; _i < types_17.length; _i++) {
+                    var t = types_17[_i];
+                    if (maybeTypeOfKind(t, kind)) {
+                        return true;
                     }
                 }
             }
-            // Now skip arrow functions to get the "real" owner of 'this'.
-            if (container.kind === 180 /* ArrowFunction */) {
-                container = ts.getThisContainer(container, /* includeArrowFunctions */ false);
-                // When targeting es6, arrow function lexically bind "this" so we do not need to do the work of binding "this" in emitted code
-                needToCaptureLexicalThis = (languageVersion < 2 /* ES6 */);
+            return false;
+        }
+        // Return true if type is of the given kind. A union type is of a given kind if all constituent types
+        // are of the given kind. An intersection type is of a given kind if at least one constituent type is
+        // of the given kind.
+        function isTypeOfKind(type, kind) {
+            if (type.flags & kind) {
+                return true;
             }
-            switch (container.kind) {
-                case 225 /* ModuleDeclaration */:
-                    error(node, ts.Diagnostics.this_cannot_be_referenced_in_a_module_or_namespace_body);
-                    // do not return here so in case if lexical this is captured - it will be reflected in flags on NodeLinks
-                    break;
-                case 224 /* EnumDeclaration */:
-                    error(node, ts.Diagnostics.this_cannot_be_referenced_in_current_location);
-                    // do not return here so in case if lexical this is captured - it will be reflected in flags on NodeLinks
-                    break;
-                case 148 /* Constructor */:
-                    if (isInConstructorArgumentInitializer(node, container)) {
-                        error(node, ts.Diagnostics.this_cannot_be_referenced_in_constructor_arguments);
-                    }
-                    break;
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
-                    if (ts.getModifierFlags(container) & 32 /* Static */) {
-                        error(node, ts.Diagnostics.this_cannot_be_referenced_in_a_static_property_initializer);
+            if (type.flags & 65536 /* Union */) {
+                var types = type.types;
+                for (var _i = 0, types_18 = types; _i < types_18.length; _i++) {
+                    var t = types_18[_i];
+                    if (!isTypeOfKind(t, kind)) {
+                        return false;
                     }
-                    break;
-                case 140 /* ComputedPropertyName */:
-                    error(node, ts.Diagnostics.this_cannot_be_referenced_in_a_computed_property_name);
-                    break;
-            }
-            if (needToCaptureLexicalThis) {
-                captureLexicalThis(node, container);
+                }
+                return true;
             }
-            if (ts.isFunctionLike(container) &&
-                (!isInParameterInitializerBeforeContainingFunction(node) || getFunctionLikeThisParameter(container))) {
-                // Note: a parameter initializer should refer to class-this unless function-this is explicitly annotated.
-                // If this is a function in a JS file, it might be a class method. Check if it's the RHS
-                // of a x.prototype.y = function [name]() { .... }
-                if (container.kind === 179 /* FunctionExpression */ &&
-                    ts.isInJavaScriptFile(container.parent) &&
-                    ts.getSpecialPropertyAssignmentKind(container.parent) === 3 /* PrototypeProperty */) {
-                    // Get the 'x' of 'x.prototype.y = f' (here, 'f' is 'container')
-                    var className = container.parent // x.prototype.y = f
-                        .left // x.prototype.y
-                        .expression // x.prototype
-                        .expression; // x
-                    var classSymbol = checkExpression(className).symbol;
-                    if (classSymbol && classSymbol.members && (classSymbol.flags & 16 /* Function */)) {
-                        return getInferredClassType(classSymbol);
+            if (type.flags & 131072 /* Intersection */) {
+                var types = type.types;
+                for (var _a = 0, types_19 = types; _a < types_19.length; _a++) {
+                    var t = types_19[_a];
+                    if (isTypeOfKind(t, kind)) {
+                        return true;
                     }
                 }
-                var thisType = getThisTypeOfDeclaration(container);
-                if (thisType) {
-                    return thisType;
-                }
             }
-            if (ts.isClassLike(container.parent)) {
-                var symbol = getSymbolOfNode(container.parent);
-                var type = ts.hasModifier(container, 32 /* Static */) ? getTypeOfSymbol(symbol) : getDeclaredTypeOfSymbol(symbol).thisType;
-                return getFlowTypeOfReference(node, type, /*assumeInitialized*/ true, /*flowContainer*/ undefined);
+            return false;
+        }
+        function isConstEnumObjectType(type) {
+            return getObjectFlags(type) & 16 /* Anonymous */ && type.symbol && isConstEnumSymbol(type.symbol);
+        }
+        function isConstEnumSymbol(symbol) {
+            return (symbol.flags & 128 /* ConstEnum */) !== 0;
+        }
+        function checkInstanceOfExpression(left, right, leftType, rightType) {
+            if (leftType === silentNeverType || rightType === silentNeverType) {
+                return silentNeverType;
             }
-            if (ts.isInJavaScriptFile(node)) {
-                var type = getTypeForThisExpressionFromJSDoc(container);
-                if (type && type !== unknownType) {
-                    return type;
-                }
+            // TypeScript 1.0 spec (April 2014): 4.15.4
+            // The instanceof operator requires the left operand to be of type Any, an object type, or a type parameter type,
+            // and the right operand to be of type Any, a subtype of the 'Function' interface type, or have a call or construct signature.
+            // The result is always of the Boolean primitive type.
+            // NOTE: do not raise error if leftType is unknown as related error was already reported
+            if (isTypeOfKind(leftType, 8190 /* Primitive */)) {
+                error(left, ts.Diagnostics.The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_parameter);
             }
-            if (compilerOptions.noImplicitThis) {
-                // With noImplicitThis, functions may not reference 'this' if it has type 'any'
-                error(node, ts.Diagnostics.this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation);
+            // NOTE: do not raise error if right is unknown as related error was already reported
+            if (!(isTypeAny(rightType) ||
+                getSignaturesOfType(rightType, 0 /* Call */).length ||
+                getSignaturesOfType(rightType, 1 /* Construct */).length ||
+                isTypeSubtypeOf(rightType, globalFunctionType))) {
+                error(right, ts.Diagnostics.The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_Function_interface_type);
             }
-            return anyType;
+            return booleanType;
         }
-        function getTypeForThisExpressionFromJSDoc(node) {
-            var typeTag = ts.getJSDocTypeTag(node);
-            if (typeTag && typeTag.typeExpression && typeTag.typeExpression.type && typeTag.typeExpression.type.kind === 269 /* JSDocFunctionType */) {
-                var jsDocFunctionType = typeTag.typeExpression.type;
-                if (jsDocFunctionType.parameters.length > 0 && jsDocFunctionType.parameters[0].type.kind === 272 /* JSDocThisType */) {
-                    return getTypeFromTypeNode(jsDocFunctionType.parameters[0].type);
-                }
+        function checkInExpression(left, right, leftType, rightType) {
+            if (leftType === silentNeverType || rightType === silentNeverType) {
+                return silentNeverType;
             }
-        }
-        function isInConstructorArgumentInitializer(node, constructorDecl) {
-            for (var n = node; n && n !== constructorDecl; n = n.parent) {
-                if (n.kind === 142 /* Parameter */) {
-                    return true;
-                }
+            leftType = checkNonNullType(leftType, left);
+            rightType = checkNonNullType(rightType, right);
+            // TypeScript 1.0 spec (April 2014): 4.15.5
+            // The in operator requires the left operand to be of type Any, the String primitive type, or the Number primitive type,
+            // and the right operand to be of type Any, an object type, or a type parameter type.
+            // The result is always of the Boolean primitive type.
+            if (!(isTypeComparableTo(leftType, stringType) || isTypeOfKind(leftType, 84 /* NumberLike */ | 512 /* ESSymbol */))) {
+                error(left, ts.Diagnostics.The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol);
             }
-            return false;
+            if (!isTypeAnyOrAllConstituentTypesHaveKind(rightType, 32768 /* Object */ | 540672 /* TypeVariable */ | 16777216 /* NonPrimitive */)) {
+                error(right, ts.Diagnostics.The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter);
+            }
+            return booleanType;
         }
-        function checkSuperExpression(node) {
-            var isCallExpression = node.parent.kind === 174 /* CallExpression */ && node.parent.expression === node;
-            var container = ts.getSuperContainer(node, /*stopOnFunctions*/ true);
-            var needToCaptureLexicalThis = false;
-            // adjust the container reference in case if super is used inside arrow functions with arbitrarily deep nesting
-            if (!isCallExpression) {
-                while (container && container.kind === 180 /* ArrowFunction */) {
-                    container = ts.getSuperContainer(container, /*stopOnFunctions*/ true);
-                    needToCaptureLexicalThis = languageVersion < 2 /* ES6 */;
-                }
+        function checkObjectLiteralAssignment(node, sourceType) {
+            var properties = node.properties;
+            for (var _i = 0, properties_6 = properties; _i < properties_6.length; _i++) {
+                var p = properties_6[_i];
+                checkObjectLiteralDestructuringPropertyAssignment(sourceType, p, properties);
             }
-            var canUseSuperExpression = isLegalUsageOfSuperExpression(container);
-            var nodeCheckFlag = 0;
-            if (!canUseSuperExpression) {
-                // issue more specific error if super is used in computed property name
-                // class A { foo() { return "1" }}
-                // class B {
-                //     [super.foo()]() {}
-                // }
-                var current = node;
-                while (current && current !== container && current.kind !== 140 /* ComputedPropertyName */) {
-                    current = current.parent;
-                }
-                if (current && current.kind === 140 /* ComputedPropertyName */) {
-                    error(node, ts.Diagnostics.super_cannot_be_referenced_in_a_computed_property_name);
+            return sourceType;
+        }
+        /** Note: If property cannot be a SpreadAssignment, then allProperties does not need to be provided */
+        function checkObjectLiteralDestructuringPropertyAssignment(objectLiteralType, property, allProperties) {
+            if (property.kind === 261 /* PropertyAssignment */ || property.kind === 262 /* ShorthandPropertyAssignment */) {
+                var name_23 = property.name;
+                if (name_23.kind === 144 /* ComputedPropertyName */) {
+                    checkComputedPropertyName(name_23);
                 }
-                else if (isCallExpression) {
-                    error(node, ts.Diagnostics.Super_calls_are_not_permitted_outside_constructors_or_in_nested_functions_inside_constructors);
+                if (isComputedNonLiteralName(name_23)) {
+                    return undefined;
                 }
-                else if (!container || !container.parent || !(ts.isClassLike(container.parent) || container.parent.kind === 171 /* ObjectLiteralExpression */)) {
-                    error(node, ts.Diagnostics.super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions);
+                var text = ts.getTextOfPropertyName(name_23);
+                var type = isTypeAny(objectLiteralType)
+                    ? objectLiteralType
+                    : getTypeOfPropertyOfType(objectLiteralType, text) ||
+                        isNumericLiteralName(text) && getIndexTypeOfType(objectLiteralType, 1 /* Number */) ||
+                        getIndexTypeOfType(objectLiteralType, 0 /* String */);
+                if (type) {
+                    if (property.kind === 262 /* ShorthandPropertyAssignment */) {
+                        return checkDestructuringAssignment(property, type);
+                    }
+                    else {
+                        // non-shorthand property assignments should always have initializers
+                        return checkDestructuringAssignment(property.initializer, type);
+                    }
                 }
                 else {
-                    error(node, ts.Diagnostics.super_property_access_is_permitted_only_in_a_constructor_member_function_or_member_accessor_of_a_derived_class);
+                    error(name_23, ts.Diagnostics.Type_0_has_no_property_1_and_no_string_index_signature, typeToString(objectLiteralType), ts.declarationNameToString(name_23));
                 }
-                return unknownType;
-            }
-            if ((ts.getModifierFlags(container) & 32 /* Static */) || isCallExpression) {
-                nodeCheckFlag = 512 /* SuperStatic */;
-            }
-            else {
-                nodeCheckFlag = 256 /* SuperInstance */;
             }
-            getNodeLinks(node).flags |= nodeCheckFlag;
-            // Due to how we emit async functions, we need to specialize the emit for an async method that contains a `super` reference.
-            // This is due to the fact that we emit the body of an async function inside of a generator function. As generator
-            // functions cannot reference `super`, we emit a helper inside of the method body, but outside of the generator. This helper
-            // uses an arrow function, which is permitted to reference `super`.
-            //
-            // There are two primary ways we can access `super` from within an async method. The first is getting the value of a property
-            // or indexed access on super, either as part of a right-hand-side expression or call expression. The second is when setting the value
-            // of a property or indexed access, either as part of an assignment expression or destructuring assignment.
-            //
-            // The simplest case is reading a value, in which case we will emit something like the following:
-            //
-            //  // ts
-            //  ...
-            //  async asyncMethod() {
-            //    let x = await super.asyncMethod();
-            //    return x;
-            //  }
-            //  ...
-            //
-            //  // js
-            //  ...
-            //  asyncMethod() {
-            //      const _super = name => super[name];
-            //      return __awaiter(this, arguments, Promise, function *() {
-            //          let x = yield _super("asyncMethod").call(this);
-            //          return x;
-            //      });
-            //  }
-            //  ...
-            //
-            // The more complex case is when we wish to assign a value, especially as part of a destructuring assignment. As both cases
-            // are legal in ES6, but also likely less frequent, we emit the same more complex helper for both scenarios:
-            //
-            //  // ts
-            //  ...
-            //  async asyncMethod(ar: Promise<any[]>) {
-            //      [super.a, super.b] = await ar;
-            //  }
-            //  ...
-            //
-            //  // js
-            //  ...
-            //  asyncMethod(ar) {
-            //      const _super = (function (geti, seti) {
-            //          const cache = Object.create(null);
-            //          return name => cache[name] || (cache[name] = { get value() { return geti(name); }, set value(v) { seti(name, v); } });
-            //      })(name => super[name], (name, value) => super[name] = value);
-            //      return __awaiter(this, arguments, Promise, function *() {
-            //          [_super("a").value, _super("b").value] = yield ar;
-            //      });
-            //  }
-            //  ...
-            //
-            // This helper creates an object with a "value" property that wraps the `super` property or indexed access for both get and set.
-            // This is required for destructuring assignments, as a call expression cannot be used as the target of a destructuring assignment
-            // while a property access can.
-            if (container.kind === 147 /* MethodDeclaration */ && ts.getModifierFlags(container) & 256 /* Async */) {
-                if (ts.isSuperProperty(node.parent) && ts.isAssignmentTarget(node.parent)) {
-                    getNodeLinks(container).flags |= 4096 /* AsyncMethodWithSuperBinding */;
+            else if (property.kind === 263 /* SpreadAssignment */) {
+                if (languageVersion < 5 /* ESNext */) {
+                    checkExternalEmitHelpers(property, 4 /* Rest */);
                 }
-                else {
-                    getNodeLinks(container).flags |= 2048 /* AsyncMethodWithSuper */;
+                var nonRestNames = [];
+                if (allProperties) {
+                    for (var i = 0; i < allProperties.length - 1; i++) {
+                        nonRestNames.push(allProperties[i].name);
+                    }
                 }
+                var type = getRestType(objectLiteralType, nonRestNames, objectLiteralType.symbol);
+                return checkDestructuringAssignment(property.expression, type);
             }
-            if (needToCaptureLexicalThis) {
-                // call expressions are allowed only in constructors so they should always capture correct 'this'
-                // super property access expressions can also appear in arrow functions -
-                // in this case they should also use correct lexical this
-                captureLexicalThis(node.parent, container);
-            }
-            if (container.parent.kind === 171 /* ObjectLiteralExpression */) {
-                if (languageVersion < 2 /* ES6 */) {
-                    error(node, ts.Diagnostics.super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_higher);
-                    return unknownType;
-                }
-                else {
-                    // for object literal assume that type of 'super' is 'any'
-                    return anyType;
-                }
+            else {
+                error(property, ts.Diagnostics.Property_assignment_expected);
             }
-            // at this point the only legal case for parent is ClassLikeDeclaration
-            var classLikeDeclaration = container.parent;
-            var classType = getDeclaredTypeOfSymbol(getSymbolOfNode(classLikeDeclaration));
-            var baseClassType = classType && getBaseTypes(classType)[0];
-            if (!baseClassType) {
-                if (!ts.getClassExtendsHeritageClauseElement(classLikeDeclaration)) {
-                    error(node, ts.Diagnostics.super_can_only_be_referenced_in_a_derived_class);
-                }
-                return unknownType;
+        }
+        function checkArrayLiteralAssignment(node, sourceType, checkMode) {
+            if (languageVersion < 2 /* ES2015 */ && compilerOptions.downlevelIteration) {
+                checkExternalEmitHelpers(node, 512 /* Read */);
             }
-            if (container.kind === 148 /* Constructor */ && isInConstructorArgumentInitializer(node, container)) {
-                // issue custom error message for super property access in constructor arguments (to be aligned with old compiler)
-                error(node, ts.Diagnostics.super_cannot_be_referenced_in_constructor_arguments);
-                return unknownType;
+            // This elementType will be used if the specific property corresponding to this index is not
+            // present (aka the tuple element property). This call also checks that the parentType is in
+            // fact an iterable or array (depending on target language).
+            var elementType = checkIteratedTypeOrElementType(sourceType, node, /*allowStringInput*/ false, /*allowAsyncIterables*/ false) || unknownType;
+            var elements = node.elements;
+            for (var i = 0; i < elements.length; i++) {
+                checkArrayLiteralDestructuringElementAssignment(node, sourceType, i, elementType, checkMode);
             }
-            return nodeCheckFlag === 512 /* SuperStatic */
-                ? getBaseConstructorTypeOfClass(classType)
-                : getTypeWithThisArgument(baseClassType, classType.thisType);
-            function isLegalUsageOfSuperExpression(container) {
-                if (!container) {
-                    return false;
-                }
-                if (isCallExpression) {
-                    // TS 1.0 SPEC (April 2014): 4.8.1
-                    // Super calls are only permitted in constructors of derived classes
-                    return container.kind === 148 /* Constructor */;
+            return sourceType;
+        }
+        function checkArrayLiteralDestructuringElementAssignment(node, sourceType, elementIndex, elementType, checkMode) {
+            var elements = node.elements;
+            var element = elements[elementIndex];
+            if (element.kind !== 200 /* OmittedExpression */) {
+                if (element.kind !== 198 /* SpreadElement */) {
+                    var propName = "" + elementIndex;
+                    var type = isTypeAny(sourceType)
+                        ? sourceType
+                        : isTupleLikeType(sourceType)
+                            ? getTypeOfPropertyOfType(sourceType, propName)
+                            : elementType;
+                    if (type) {
+                        return checkDestructuringAssignment(element, type, checkMode);
+                    }
+                    else {
+                        // We still need to check element expression here because we may need to set appropriate flag on the expression
+                        // such as NodeCheckFlags.LexicalThis on "this"expression.
+                        checkExpression(element);
+                        if (isTupleType(sourceType)) {
+                            error(element, ts.Diagnostics.Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2, typeToString(sourceType), getTypeReferenceArity(sourceType), elements.length);
+                        }
+                        else {
+                            error(element, ts.Diagnostics.Type_0_has_no_property_1, typeToString(sourceType), propName);
+                        }
+                    }
                 }
                 else {
-                    // TS 1.0 SPEC (April 2014)
-                    // 'super' property access is allowed
-                    // - In a constructor, instance member function, instance member accessor, or instance member variable initializer where this references a derived class instance
-                    // - In a static member function or static member accessor
-                    // topmost container must be something that is directly nested in the class declaration\object literal expression
-                    if (ts.isClassLike(container.parent) || container.parent.kind === 171 /* ObjectLiteralExpression */) {
-                        if (ts.getModifierFlags(container) & 32 /* Static */) {
-                            return container.kind === 147 /* MethodDeclaration */ ||
-                                container.kind === 146 /* MethodSignature */ ||
-                                container.kind === 149 /* GetAccessor */ ||
-                                container.kind === 150 /* SetAccessor */;
+                    if (elementIndex < elements.length - 1) {
+                        error(element, ts.Diagnostics.A_rest_element_must_be_last_in_a_destructuring_pattern);
+                    }
+                    else {
+                        var restExpression = element.expression;
+                        if (restExpression.kind === 194 /* BinaryExpression */ && restExpression.operatorToken.kind === 58 /* EqualsToken */) {
+                            error(restExpression.operatorToken, ts.Diagnostics.A_rest_element_cannot_have_an_initializer);
                         }
                         else {
-                            return container.kind === 147 /* MethodDeclaration */ ||
-                                container.kind === 146 /* MethodSignature */ ||
-                                container.kind === 149 /* GetAccessor */ ||
-                                container.kind === 150 /* SetAccessor */ ||
-                                container.kind === 145 /* PropertyDeclaration */ ||
-                                container.kind === 144 /* PropertySignature */ ||
-                                container.kind === 148 /* Constructor */;
+                            return checkDestructuringAssignment(restExpression, createArrayType(elementType), checkMode);
                         }
                     }
                 }
-                return false;
-            }
-        }
-        function getContextualThisParameter(func) {
-            if (isContextSensitiveFunctionOrObjectLiteralMethod(func) && func.kind !== 180 /* ArrowFunction */) {
-                var contextualSignature = getContextualSignature(func);
-                if (contextualSignature) {
-                    return contextualSignature.thisParameter;
-                }
             }
             return undefined;
         }
-        // Return contextual type of parameter or undefined if no contextual type is available
-        function getContextuallyTypedParameterType(parameter) {
-            var func = parameter.parent;
-            if (isContextSensitiveFunctionOrObjectLiteralMethod(func)) {
-                var iife = ts.getImmediatelyInvokedFunctionExpression(func);
-                if (iife) {
-                    var indexOfParameter = ts.indexOf(func.parameters, parameter);
-                    if (iife.arguments && indexOfParameter < iife.arguments.length) {
-                        if (parameter.dotDotDotToken) {
-                            var restTypes = [];
-                            for (var i = indexOfParameter; i < iife.arguments.length; i++) {
-                                restTypes.push(getWidenedLiteralType(checkExpression(iife.arguments[i])));
-                            }
-                            return createArrayType(getUnionType(restTypes));
-                        }
-                        var links = getNodeLinks(iife);
-                        var cached = links.resolvedSignature;
-                        links.resolvedSignature = anySignature;
-                        var type = getWidenedLiteralType(checkExpression(iife.arguments[indexOfParameter]));
-                        links.resolvedSignature = cached;
-                        return type;
+        function checkDestructuringAssignment(exprOrAssignment, sourceType, checkMode) {
+            var target;
+            if (exprOrAssignment.kind === 262 /* ShorthandPropertyAssignment */) {
+                var prop = exprOrAssignment;
+                if (prop.objectAssignmentInitializer) {
+                    // In strict null checking mode, if a default value of a non-undefined type is specified, remove
+                    // undefined from the final type.
+                    if (strictNullChecks &&
+                        !(getFalsyFlags(checkExpression(prop.objectAssignmentInitializer)) & 2048 /* Undefined */)) {
+                        sourceType = getTypeWithFacts(sourceType, 131072 /* NEUndefined */);
                     }
+                    checkBinaryLikeExpression(prop.name, prop.equalsToken, prop.objectAssignmentInitializer, checkMode);
                 }
-                var contextualSignature = getContextualSignature(func);
-                if (contextualSignature) {
-                    var funcHasRestParameters = ts.hasRestParameter(func);
-                    var len = func.parameters.length - (funcHasRestParameters ? 1 : 0);
-                    var indexOfParameter = ts.indexOf(func.parameters, parameter);
-                    if (indexOfParameter < len) {
-                        return getTypeAtPosition(contextualSignature, indexOfParameter);
+                target = exprOrAssignment.name;
+            }
+            else {
+                target = exprOrAssignment;
+            }
+            if (target.kind === 194 /* BinaryExpression */ && target.operatorToken.kind === 58 /* EqualsToken */) {
+                checkBinaryExpression(target, checkMode);
+                target = target.left;
+            }
+            if (target.kind === 178 /* ObjectLiteralExpression */) {
+                return checkObjectLiteralAssignment(target, sourceType);
+            }
+            if (target.kind === 177 /* ArrayLiteralExpression */) {
+                return checkArrayLiteralAssignment(target, sourceType, checkMode);
+            }
+            return checkReferenceAssignment(target, sourceType, checkMode);
+        }
+        function checkReferenceAssignment(target, sourceType, checkMode) {
+            var targetType = checkExpression(target, checkMode);
+            var error = target.parent.kind === 263 /* SpreadAssignment */ ?
+                ts.Diagnostics.The_target_of_an_object_rest_assignment_must_be_a_variable_or_a_property_access :
+                ts.Diagnostics.The_left_hand_side_of_an_assignment_expression_must_be_a_variable_or_a_property_access;
+            if (checkReferenceExpression(target, error)) {
+                checkTypeAssignableTo(sourceType, targetType, target, /*headMessage*/ undefined);
+            }
+            return sourceType;
+        }
+        /**
+         * This is a *shallow* check: An expression is side-effect-free if the
+         * evaluation of the expression *itself* cannot produce side effects.
+         * For example, x++ / 3 is side-effect free because the / operator
+         * does not have side effects.
+         * The intent is to "smell test" an expression for correctness in positions where
+         * its value is discarded (e.g. the left side of the comma operator).
+         */
+        function isSideEffectFree(node) {
+            node = ts.skipParentheses(node);
+            switch (node.kind) {
+                case 71 /* Identifier */:
+                case 9 /* StringLiteral */:
+                case 12 /* RegularExpressionLiteral */:
+                case 183 /* TaggedTemplateExpression */:
+                case 196 /* TemplateExpression */:
+                case 13 /* NoSubstitutionTemplateLiteral */:
+                case 8 /* NumericLiteral */:
+                case 101 /* TrueKeyword */:
+                case 86 /* FalseKeyword */:
+                case 95 /* NullKeyword */:
+                case 139 /* UndefinedKeyword */:
+                case 186 /* FunctionExpression */:
+                case 199 /* ClassExpression */:
+                case 187 /* ArrowFunction */:
+                case 177 /* ArrayLiteralExpression */:
+                case 178 /* ObjectLiteralExpression */:
+                case 189 /* TypeOfExpression */:
+                case 203 /* NonNullExpression */:
+                case 250 /* JsxSelfClosingElement */:
+                case 249 /* JsxElement */:
+                    return true;
+                case 195 /* ConditionalExpression */:
+                    return isSideEffectFree(node.whenTrue) &&
+                        isSideEffectFree(node.whenFalse);
+                case 194 /* BinaryExpression */:
+                    if (ts.isAssignmentOperator(node.operatorToken.kind)) {
+                        return false;
                     }
-                    // If last parameter is contextually rest parameter get its type
-                    if (funcHasRestParameters &&
-                        indexOfParameter === (func.parameters.length - 1) &&
-                        isRestParameterIndex(contextualSignature, func.parameters.length - 1)) {
-                        return getTypeOfSymbol(ts.lastOrUndefined(contextualSignature.parameters));
+                    return isSideEffectFree(node.left) &&
+                        isSideEffectFree(node.right);
+                case 192 /* PrefixUnaryExpression */:
+                case 193 /* PostfixUnaryExpression */:
+                    // Unary operators ~, !, +, and - have no side effects.
+                    // The rest do.
+                    switch (node.operator) {
+                        case 51 /* ExclamationToken */:
+                        case 37 /* PlusToken */:
+                        case 38 /* MinusToken */:
+                        case 52 /* TildeToken */:
+                            return true;
                     }
-                }
+                    return false;
+                // Some forms listed here for clarity
+                case 190 /* VoidExpression */: // Explicit opt-out
+                case 184 /* TypeAssertionExpression */: // Not SEF, but can produce useful type warnings
+                case 202 /* AsExpression */: // Not SEF, but can produce useful type warnings
+                default:
+                    return false;
             }
-            return undefined;
         }
-        // In a variable, parameter or property declaration with a type annotation,
-        //   the contextual type of an initializer expression is the type of the variable, parameter or property.
-        // Otherwise, in a parameter declaration of a contextually typed function expression,
-        //   the contextual type of an initializer expression is the contextual type of the parameter.
-        // Otherwise, in a variable or parameter declaration with a binding pattern name,
-        //   the contextual type of an initializer expression is the type implied by the binding pattern.
-        // Otherwise, in a binding pattern inside a variable or parameter declaration,
-        //   the contextual type of an initializer expression is the type annotation of the containing declaration, if present.
-        function getContextualTypeForInitializerExpression(node) {
-            var declaration = node.parent;
-            if (node === declaration.initializer) {
-                if (declaration.type) {
-                    return getTypeFromTypeNode(declaration.type);
-                }
-                if (declaration.kind === 142 /* Parameter */) {
-                    var type = getContextuallyTypedParameterType(declaration);
-                    if (type) {
-                        return type;
+        function isTypeEqualityComparableTo(source, target) {
+            return (target.flags & 6144 /* Nullable */) !== 0 || isTypeComparableTo(source, target);
+        }
+        function getBestChoiceType(type1, type2) {
+            var firstAssignableToSecond = isTypeAssignableTo(type1, type2);
+            var secondAssignableToFirst = isTypeAssignableTo(type2, type1);
+            return secondAssignableToFirst && !firstAssignableToSecond ? type1 :
+                firstAssignableToSecond && !secondAssignableToFirst ? type2 :
+                    getUnionType([type1, type2], /*subtypeReduction*/ true);
+        }
+        function checkBinaryExpression(node, checkMode) {
+            return checkBinaryLikeExpression(node.left, node.operatorToken, node.right, checkMode, node);
+        }
+        function checkBinaryLikeExpression(left, operatorToken, right, checkMode, errorNode) {
+            var operator = operatorToken.kind;
+            if (operator === 58 /* EqualsToken */ && (left.kind === 178 /* ObjectLiteralExpression */ || left.kind === 177 /* ArrayLiteralExpression */)) {
+                return checkDestructuringAssignment(left, checkExpression(right, checkMode), checkMode);
+            }
+            var leftType = checkExpression(left, checkMode);
+            var rightType = checkExpression(right, checkMode);
+            switch (operator) {
+                case 39 /* AsteriskToken */:
+                case 40 /* AsteriskAsteriskToken */:
+                case 61 /* AsteriskEqualsToken */:
+                case 62 /* AsteriskAsteriskEqualsToken */:
+                case 41 /* SlashToken */:
+                case 63 /* SlashEqualsToken */:
+                case 42 /* PercentToken */:
+                case 64 /* PercentEqualsToken */:
+                case 38 /* MinusToken */:
+                case 60 /* MinusEqualsToken */:
+                case 45 /* LessThanLessThanToken */:
+                case 65 /* LessThanLessThanEqualsToken */:
+                case 46 /* GreaterThanGreaterThanToken */:
+                case 66 /* GreaterThanGreaterThanEqualsToken */:
+                case 47 /* GreaterThanGreaterThanGreaterThanToken */:
+                case 67 /* GreaterThanGreaterThanGreaterThanEqualsToken */:
+                case 49 /* BarToken */:
+                case 69 /* BarEqualsToken */:
+                case 50 /* CaretToken */:
+                case 70 /* CaretEqualsToken */:
+                case 48 /* AmpersandToken */:
+                case 68 /* AmpersandEqualsToken */:
+                    if (leftType === silentNeverType || rightType === silentNeverType) {
+                        return silentNeverType;
+                    }
+                    leftType = checkNonNullType(leftType, left);
+                    rightType = checkNonNullType(rightType, right);
+                    var suggestedOperator = void 0;
+                    // if a user tries to apply a bitwise operator to 2 boolean operands
+                    // try and return them a helpful suggestion
+                    if ((leftType.flags & 136 /* BooleanLike */) &&
+                        (rightType.flags & 136 /* BooleanLike */) &&
+                        (suggestedOperator = getSuggestedBooleanOperator(operatorToken.kind)) !== undefined) {
+                        error(errorNode || operatorToken, ts.Diagnostics.The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead, ts.tokenToString(operatorToken.kind), ts.tokenToString(suggestedOperator));
+                    }
+                    else {
+                        // otherwise just check each operand separately and report errors as normal
+                        var leftOk = checkArithmeticOperandType(left, leftType, ts.Diagnostics.The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type);
+                        var rightOk = checkArithmeticOperandType(right, rightType, ts.Diagnostics.The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type);
+                        if (leftOk && rightOk) {
+                            checkAssignmentOperator(numberType);
+                        }
+                    }
+                    return numberType;
+                case 37 /* PlusToken */:
+                case 59 /* PlusEqualsToken */:
+                    if (leftType === silentNeverType || rightType === silentNeverType) {
+                        return silentNeverType;
+                    }
+                    if (!isTypeOfKind(leftType, 1 /* Any */ | 262178 /* StringLike */) && !isTypeOfKind(rightType, 1 /* Any */ | 262178 /* StringLike */)) {
+                        leftType = checkNonNullType(leftType, left);
+                        rightType = checkNonNullType(rightType, right);
+                    }
+                    var resultType = void 0;
+                    if (isTypeOfKind(leftType, 84 /* NumberLike */) && isTypeOfKind(rightType, 84 /* NumberLike */)) {
+                        // Operands of an enum type are treated as having the primitive type Number.
+                        // If both operands are of the Number primitive type, the result is of the Number primitive type.
+                        resultType = numberType;
+                    }
+                    else {
+                        if (isTypeOfKind(leftType, 262178 /* StringLike */) || isTypeOfKind(rightType, 262178 /* StringLike */)) {
+                            // If one or both operands are of the String primitive type, the result is of the String primitive type.
+                            resultType = stringType;
+                        }
+                        else if (isTypeAny(leftType) || isTypeAny(rightType)) {
+                            // Otherwise, the result is of type Any.
+                            // NOTE: unknown type here denotes error type. Old compiler treated this case as any type so do we.
+                            resultType = leftType === unknownType || rightType === unknownType ? unknownType : anyType;
+                        }
+                        // Symbols are not allowed at all in arithmetic expressions
+                        if (resultType && !checkForDisallowedESSymbolOperand(operator)) {
+                            return resultType;
+                        }
+                    }
+                    if (!resultType) {
+                        reportOperatorError();
+                        return anyType;
+                    }
+                    if (operator === 59 /* PlusEqualsToken */) {
+                        checkAssignmentOperator(resultType);
+                    }
+                    return resultType;
+                case 27 /* LessThanToken */:
+                case 29 /* GreaterThanToken */:
+                case 30 /* LessThanEqualsToken */:
+                case 31 /* GreaterThanEqualsToken */:
+                    if (checkForDisallowedESSymbolOperand(operator)) {
+                        leftType = getBaseTypeOfLiteralType(checkNonNullType(leftType, left));
+                        rightType = getBaseTypeOfLiteralType(checkNonNullType(rightType, right));
+                        if (!isTypeComparableTo(leftType, rightType) && !isTypeComparableTo(rightType, leftType)) {
+                            reportOperatorError();
+                        }
+                    }
+                    return booleanType;
+                case 32 /* EqualsEqualsToken */:
+                case 33 /* ExclamationEqualsToken */:
+                case 34 /* EqualsEqualsEqualsToken */:
+                case 35 /* ExclamationEqualsEqualsToken */:
+                    var leftIsLiteral = isLiteralType(leftType);
+                    var rightIsLiteral = isLiteralType(rightType);
+                    if (!leftIsLiteral || !rightIsLiteral) {
+                        leftType = leftIsLiteral ? getBaseTypeOfLiteralType(leftType) : leftType;
+                        rightType = rightIsLiteral ? getBaseTypeOfLiteralType(rightType) : rightType;
+                    }
+                    if (!isTypeEqualityComparableTo(leftType, rightType) && !isTypeEqualityComparableTo(rightType, leftType)) {
+                        reportOperatorError();
                     }
-                }
-                if (ts.isBindingPattern(declaration.name)) {
-                    return getTypeFromBindingPattern(declaration.name, /*includePatternInType*/ true, /*reportErrors*/ false);
-                }
-                if (ts.isBindingPattern(declaration.parent)) {
-                    var parentDeclaration = declaration.parent.parent;
-                    var name_15 = declaration.propertyName || declaration.name;
-                    if (ts.isVariableLike(parentDeclaration) &&
-                        parentDeclaration.type &&
-                        !ts.isBindingPattern(name_15)) {
-                        var text = getTextOfPropertyName(name_15);
-                        if (text) {
-                            return getTypeOfPropertyOfType(getTypeFromTypeNode(parentDeclaration.type), text);
-                        }
+                    return booleanType;
+                case 93 /* InstanceOfKeyword */:
+                    return checkInstanceOfExpression(left, right, leftType, rightType);
+                case 92 /* InKeyword */:
+                    return checkInExpression(left, right, leftType, rightType);
+                case 53 /* AmpersandAmpersandToken */:
+                    return getTypeFacts(leftType) & 1048576 /* Truthy */ ?
+                        getUnionType([extractDefinitelyFalsyTypes(strictNullChecks ? leftType : getBaseTypeOfLiteralType(rightType)), rightType]) :
+                        leftType;
+                case 54 /* BarBarToken */:
+                    return getTypeFacts(leftType) & 2097152 /* Falsy */ ?
+                        getBestChoiceType(removeDefinitelyFalsyTypes(leftType), rightType) :
+                        leftType;
+                case 58 /* EqualsToken */:
+                    checkAssignmentOperator(rightType);
+                    return getRegularTypeOfObjectLiteral(rightType);
+                case 26 /* CommaToken */:
+                    if (!compilerOptions.allowUnreachableCode && isSideEffectFree(left) && !isEvalNode(right)) {
+                        error(left, ts.Diagnostics.Left_side_of_comma_operator_is_unused_and_has_no_side_effects);
                     }
-                }
+                    return rightType;
             }
-            return undefined;
-        }
-        function getContextualTypeForReturnExpression(node) {
-            var func = ts.getContainingFunction(node);
-            if (ts.isAsyncFunctionLike(func)) {
-                var contextualReturnType = getContextualReturnType(func);
-                if (contextualReturnType) {
-                    return getPromisedType(contextualReturnType);
+            function isEvalNode(node) {
+                return node.kind === 71 /* Identifier */ && node.text === "eval";
+            }
+            // Return true if there was no error, false if there was an error.
+            function checkForDisallowedESSymbolOperand(operator) {
+                var offendingSymbolOperand = maybeTypeOfKind(leftType, 512 /* ESSymbol */) ? left :
+                    maybeTypeOfKind(rightType, 512 /* ESSymbol */) ? right :
+                        undefined;
+                if (offendingSymbolOperand) {
+                    error(offendingSymbolOperand, ts.Diagnostics.The_0_operator_cannot_be_applied_to_type_symbol, ts.tokenToString(operator));
+                    return false;
                 }
-                return undefined;
+                return true;
             }
-            if (func && !func.asteriskToken) {
-                return getContextualReturnType(func);
+            function getSuggestedBooleanOperator(operator) {
+                switch (operator) {
+                    case 49 /* BarToken */:
+                    case 69 /* BarEqualsToken */:
+                        return 54 /* BarBarToken */;
+                    case 50 /* CaretToken */:
+                    case 70 /* CaretEqualsToken */:
+                        return 35 /* ExclamationEqualsEqualsToken */;
+                    case 48 /* AmpersandToken */:
+                    case 68 /* AmpersandEqualsToken */:
+                        return 53 /* AmpersandAmpersandToken */;
+                    default:
+                        return undefined;
+                }
             }
-            return undefined;
-        }
-        function getContextualTypeForYieldOperand(node) {
-            var func = ts.getContainingFunction(node);
-            if (func) {
-                var contextualReturnType = getContextualReturnType(func);
-                if (contextualReturnType) {
-                    return node.asteriskToken
-                        ? contextualReturnType
-                        : getElementTypeOfIterableIterator(contextualReturnType);
+            function checkAssignmentOperator(valueType) {
+                if (produceDiagnostics && ts.isAssignmentOperator(operator)) {
+                    // TypeScript 1.0 spec (April 2014): 4.17
+                    // An assignment of the form
+                    //    VarExpr = ValueExpr
+                    // requires VarExpr to be classified as a reference
+                    // A compound assignment furthermore requires VarExpr to be classified as a reference (section 4.1)
+                    // and the type of the non - compound operation to be assignable to the type of VarExpr.
+                    if (checkReferenceExpression(left, ts.Diagnostics.The_left_hand_side_of_an_assignment_expression_must_be_a_variable_or_a_property_access)) {
+                        // to avoid cascading errors check assignability only if 'isReference' check succeeded and no errors were reported
+                        checkTypeAssignableTo(valueType, leftType, left, /*headMessage*/ undefined);
+                    }
                 }
             }
-            return undefined;
+            function reportOperatorError() {
+                error(errorNode || operatorToken, ts.Diagnostics.Operator_0_cannot_be_applied_to_types_1_and_2, ts.tokenToString(operatorToken.kind), typeToString(leftType), typeToString(rightType));
+            }
         }
-        function isInParameterInitializerBeforeContainingFunction(node) {
-            while (node.parent && !ts.isFunctionLike(node.parent)) {
-                if (node.parent.kind === 142 /* Parameter */ && node.parent.initializer === node) {
+        function isYieldExpressionInClass(node) {
+            var current = node;
+            var parent = node.parent;
+            while (parent) {
+                if (ts.isFunctionLike(parent) && current === parent.body) {
+                    return false;
+                }
+                else if (ts.isClassLike(current)) {
                     return true;
                 }
-                node = node.parent;
+                current = parent;
+                parent = parent.parent;
             }
             return false;
         }
-        function getContextualReturnType(functionDecl) {
-            // If the containing function has a return type annotation, is a constructor, or is a get accessor whose
-            // corresponding set accessor has a type annotation, return statements in the function are contextually typed
-            if (functionDecl.type ||
-                functionDecl.kind === 148 /* Constructor */ ||
-                functionDecl.kind === 149 /* GetAccessor */ && ts.getSetAccessorTypeAnnotationNode(ts.getDeclarationOfKind(functionDecl.symbol, 150 /* SetAccessor */))) {
-                return getReturnTypeOfSignature(getSignatureFromDeclaration(functionDecl));
-            }
-            // Otherwise, if the containing function is contextually typed by a function type with exactly one call signature
-            // and that call signature is non-generic, return statements are contextually typed by the return type of the signature
-            var signature = getContextualSignatureForFunctionLikeDeclaration(functionDecl);
-            if (signature) {
-                return getReturnTypeOfSignature(signature);
-            }
-            return undefined;
-        }
-        // In a typed function call, an argument or substitution expression is contextually typed by the type of the corresponding parameter.
-        function getContextualTypeForArgument(callTarget, arg) {
-            var args = getEffectiveCallArguments(callTarget);
-            var argIndex = ts.indexOf(args, arg);
-            if (argIndex >= 0) {
-                var signature = getResolvedOrAnySignature(callTarget);
-                return getTypeAtPosition(signature, argIndex);
-            }
-            return undefined;
-        }
-        function getContextualTypeForSubstitutionExpression(template, substitutionExpression) {
-            if (template.parent.kind === 176 /* TaggedTemplateExpression */) {
-                return getContextualTypeForArgument(template.parent, substitutionExpression);
-            }
-            return undefined;
-        }
-        function getContextualTypeForBinaryOperand(node) {
-            var binaryExpression = node.parent;
-            var operator = binaryExpression.operatorToken.kind;
-            if (operator >= 56 /* FirstAssignment */ && operator <= 68 /* LastAssignment */) {
-                // Don't do this for special property assignments to avoid circularity
-                if (ts.getSpecialPropertyAssignmentKind(binaryExpression) !== 0 /* None */) {
-                    return undefined;
+        function checkYieldExpression(node) {
+            // Grammar checking
+            if (produceDiagnostics) {
+                if (!(node.flags & 4096 /* YieldContext */) || isYieldExpressionInClass(node)) {
+                    grammarErrorOnFirstToken(node, ts.Diagnostics.A_yield_expression_is_only_allowed_in_a_generator_body);
                 }
-                // In an assignment expression, the right operand is contextually typed by the type of the left operand.
-                if (node === binaryExpression.right) {
-                    return checkExpression(binaryExpression.left);
+                if (isInParameterInitializerBeforeContainingFunction(node)) {
+                    error(node, ts.Diagnostics.yield_expressions_cannot_be_used_in_a_parameter_initializer);
                 }
             }
-            else if (operator === 52 /* BarBarToken */) {
-                // When an || expression has a contextual type, the operands are contextually typed by that type. When an ||
-                // expression has no contextual type, the right operand is contextually typed by the type of the left operand.
-                var type = getContextualType(binaryExpression);
-                if (!type && node === binaryExpression.right) {
-                    type = checkExpression(binaryExpression.left);
+            if (node.expression) {
+                var func = ts.getContainingFunction(node);
+                // If the user's code is syntactically correct, the func should always have a star. After all,
+                // we are in a yield context.
+                var functionFlags = func && ts.getFunctionFlags(func);
+                if (node.asteriskToken) {
+                    // Async generator functions prior to ESNext require the __await, __asyncDelegator,
+                    // and __asyncValues helpers
+                    if ((functionFlags & 3 /* AsyncGenerator */) === 3 /* AsyncGenerator */ &&
+                        languageVersion < 5 /* ESNext */) {
+                        checkExternalEmitHelpers(node, 26624 /* AsyncDelegatorIncludes */);
+                    }
+                    // Generator functions prior to ES2015 require the __values helper
+                    if ((functionFlags & 3 /* AsyncGenerator */) === 1 /* Generator */ &&
+                        languageVersion < 2 /* ES2015 */ && compilerOptions.downlevelIteration) {
+                        checkExternalEmitHelpers(node, 256 /* Values */);
+                    }
                 }
-                return type;
-            }
-            else if (operator === 51 /* AmpersandAmpersandToken */ || operator === 24 /* CommaToken */) {
-                if (node === binaryExpression.right) {
-                    return getContextualType(binaryExpression);
+                if (functionFlags & 1 /* Generator */) {
+                    var expressionType = checkExpressionCached(node.expression, /*contextualMapper*/ undefined);
+                    var expressionElementType = void 0;
+                    var nodeIsYieldStar = !!node.asteriskToken;
+                    if (nodeIsYieldStar) {
+                        expressionElementType = checkIteratedTypeOrElementType(expressionType, node.expression, /*allowStringInput*/ false, (functionFlags & 2 /* Async */) !== 0);
+                    }
+                    // There is no point in doing an assignability check if the function
+                    // has no explicit return type because the return type is directly computed
+                    // from the yield expressions.
+                    var returnType = ts.getEffectiveReturnTypeNode(func);
+                    if (returnType) {
+                        var signatureElementType = getIteratedTypeOfGenerator(getTypeFromTypeNode(returnType), (functionFlags & 2 /* Async */) !== 0) || anyType;
+                        if (nodeIsYieldStar) {
+                            checkTypeAssignableTo(functionFlags & 2 /* Async */
+                                ? getAwaitedType(expressionElementType, node.expression, ts.Diagnostics.Type_of_iterated_elements_of_a_yield_Asterisk_operand_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member)
+                                : expressionElementType, signatureElementType, node.expression, 
+                            /*headMessage*/ undefined);
+                        }
+                        else {
+                            checkTypeAssignableTo(functionFlags & 2 /* Async */
+                                ? getAwaitedType(expressionType, node.expression, ts.Diagnostics.Type_of_yield_operand_in_an_async_generator_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member)
+                                : expressionType, signatureElementType, node.expression, 
+                            /*headMessage*/ undefined);
+                        }
+                    }
                 }
             }
-            return undefined;
+            // Both yield and yield* expressions have type 'any'
+            return anyType;
         }
-        // Apply a mapping function to a contextual type and return the resulting type. If the contextual type
-        // is a union type, the mapping function is applied to each constituent type and a union of the resulting
-        // types is returned.
-        function applyToContextualType(type, mapper) {
-            if (!(type.flags & 524288 /* Union */)) {
-                return mapper(type);
+        function checkConditionalExpression(node, checkMode) {
+            checkExpression(node.condition);
+            var type1 = checkExpression(node.whenTrue, checkMode);
+            var type2 = checkExpression(node.whenFalse, checkMode);
+            return getBestChoiceType(type1, type2);
+        }
+        function checkLiteralExpression(node) {
+            if (node.kind === 8 /* NumericLiteral */) {
+                checkGrammarNumericLiteral(node);
             }
-            var types = type.types;
-            var mappedType;
-            var mappedTypes;
-            for (var _i = 0, types_12 = types; _i < types_12.length; _i++) {
-                var current = types_12[_i];
-                var t = mapper(current);
-                if (t) {
-                    if (!mappedType) {
-                        mappedType = t;
-                    }
-                    else if (!mappedTypes) {
-                        mappedTypes = [mappedType, t];
-                    }
-                    else {
-                        mappedTypes.push(t);
-                    }
-                }
+            switch (node.kind) {
+                case 9 /* StringLiteral */:
+                    return getFreshTypeOfLiteralType(getLiteralType(node.text));
+                case 8 /* NumericLiteral */:
+                    return getFreshTypeOfLiteralType(getLiteralType(+node.text));
+                case 101 /* TrueKeyword */:
+                    return trueType;
+                case 86 /* FalseKeyword */:
+                    return falseType;
             }
-            return mappedTypes ? getUnionType(mappedTypes) : mappedType;
         }
-        function getTypeOfPropertyOfContextualType(type, name) {
-            return applyToContextualType(type, function (t) {
-                var prop = t.flags & 4161536 /* StructuredType */ ? getPropertyOfType(t, name) : undefined;
-                return prop ? getTypeOfSymbol(prop) : undefined;
+        function checkTemplateExpression(node) {
+            // We just want to check each expressions, but we are unconcerned with
+            // the type of each expression, as any value may be coerced into a string.
+            // It is worth asking whether this is what we really want though.
+            // A place where we actually *are* concerned with the expressions' types are
+            // in tagged templates.
+            ts.forEach(node.templateSpans, function (templateSpan) {
+                checkExpression(templateSpan.expression);
             });
+            return stringType;
         }
-        function getIndexTypeOfContextualType(type, kind) {
-            return applyToContextualType(type, function (t) { return getIndexTypeOfStructuredType(t, kind); });
-        }
-        // Return true if the given contextual type is a tuple-like type
-        function contextualTypeIsTupleLikeType(type) {
-            return !!(type.flags & 524288 /* Union */ ? ts.forEach(type.types, isTupleLikeType) : isTupleLikeType(type));
+        function checkExpressionWithContextualType(node, contextualType, contextualMapper) {
+            var saveContextualType = node.contextualType;
+            var saveContextualMapper = node.contextualMapper;
+            node.contextualType = contextualType;
+            node.contextualMapper = contextualMapper;
+            var checkMode = contextualMapper === identityMapper ? 1 /* SkipContextSensitive */ :
+                contextualMapper ? 2 /* Inferential */ : 0 /* Normal */;
+            var result = checkExpression(node, checkMode);
+            node.contextualType = saveContextualType;
+            node.contextualMapper = saveContextualMapper;
+            return result;
         }
-        // In an object literal contextually typed by a type T, the contextual type of a property assignment is the type of
-        // the matching property in T, if one exists. Otherwise, it is the type of the numeric index signature in T, if one
-        // exists. Otherwise, it is the type of the string index signature in T, if one exists.
-        function getContextualTypeForObjectLiteralMethod(node) {
-            ts.Debug.assert(ts.isObjectLiteralMethod(node));
-            if (isInsideWithStatementBody(node)) {
-                // We cannot answer semantic questions within a with block, do not proceed any further
-                return undefined;
+        function checkExpressionCached(node, checkMode) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                // When computing a type that we're going to cache, we need to ignore any ongoing control flow
+                // analysis because variables may have transient types in indeterminable states. Moving flowLoopStart
+                // to the top of the stack ensures all transient types are computed from a known point.
+                var saveFlowLoopStart = flowLoopStart;
+                flowLoopStart = flowLoopCount;
+                links.resolvedType = checkExpression(node, checkMode);
+                flowLoopStart = saveFlowLoopStart;
             }
-            return getContextualTypeForObjectLiteralElement(node);
+            return links.resolvedType;
         }
-        function getContextualTypeForObjectLiteralElement(element) {
-            var objectLiteral = element.parent;
-            var type = getApparentTypeOfContextualType(objectLiteral);
-            if (type) {
-                if (!ts.hasDynamicName(element)) {
-                    // For a (non-symbol) computed property, there is no reason to look up the name
-                    // in the type. It will just be "__computed", which does not appear in any
-                    // SymbolTable.
-                    var symbolName = getSymbolOfNode(element).name;
-                    var propertyType = getTypeOfPropertyOfContextualType(type, symbolName);
-                    if (propertyType) {
-                        return propertyType;
+        function isTypeAssertion(node) {
+            node = ts.skipParentheses(node);
+            return node.kind === 184 /* TypeAssertionExpression */ || node.kind === 202 /* AsExpression */;
+        }
+        function checkDeclarationInitializer(declaration) {
+            var type = getTypeOfExpression(declaration.initializer, /*cache*/ true);
+            return ts.getCombinedNodeFlags(declaration) & 2 /* Const */ ||
+                ts.getCombinedModifierFlags(declaration) & 64 /* Readonly */ && !ts.isParameterPropertyDeclaration(declaration) ||
+                isTypeAssertion(declaration.initializer) ? type : getWidenedLiteralType(type);
+        }
+        function isLiteralContextualType(contextualType) {
+            if (contextualType) {
+                if (contextualType.flags & 540672 /* TypeVariable */) {
+                    var constraint = getBaseConstraintOfType(contextualType) || emptyObjectType;
+                    // If the type parameter is constrained to the base primitive type we're checking for,
+                    // consider this a literal context. For example, given a type parameter 'T extends string',
+                    // this causes us to infer string literal types for T.
+                    if (constraint.flags & (2 /* String */ | 4 /* Number */ | 8 /* Boolean */ | 16 /* Enum */)) {
+                        return true;
                     }
+                    contextualType = constraint;
                 }
-                return isNumericName(element.name) && getIndexTypeOfContextualType(type, 1 /* Number */) ||
-                    getIndexTypeOfContextualType(type, 0 /* String */);
+                return maybeTypeOfKind(contextualType, (224 /* Literal */ | 262144 /* Index */));
             }
-            return undefined;
+            return false;
         }
-        // In an array literal contextually typed by a type T, the contextual type of an element expression at index N is
-        // the type of the property with the numeric name N in T, if one exists. Otherwise, if T has a numeric index signature,
-        // it is the type of the numeric index signature in T. Otherwise, in ES6 and higher, the contextual type is the iterated
-        // type of T.
-        function getContextualTypeForElementExpression(node) {
-            var arrayLiteral = node.parent;
-            var type = getApparentTypeOfContextualType(arrayLiteral);
-            if (type) {
-                var index = ts.indexOf(arrayLiteral.elements, node);
-                return getTypeOfPropertyOfContextualType(type, "" + index)
-                    || getIndexTypeOfContextualType(type, 1 /* Number */)
-                    || (languageVersion >= 2 /* ES6 */ ? getElementTypeOfIterable(type, /*errorNode*/ undefined) : undefined);
+        function checkExpressionForMutableLocation(node, checkMode) {
+            var type = checkExpression(node, checkMode);
+            return isTypeAssertion(node) || isLiteralContextualType(getContextualType(node)) ? type : getWidenedLiteralType(type);
+        }
+        function checkPropertyAssignment(node, checkMode) {
+            // Do not use hasDynamicName here, because that returns false for well known symbols.
+            // We want to perform checkComputedPropertyName for all computed properties, including
+            // well known symbols.
+            if (node.name.kind === 144 /* ComputedPropertyName */) {
+                checkComputedPropertyName(node.name);
             }
-            return undefined;
+            return checkExpressionForMutableLocation(node.initializer, checkMode);
         }
-        // In a contextually typed conditional expression, the true/false expressions are contextually typed by the same type.
-        function getContextualTypeForConditionalOperand(node) {
-            var conditional = node.parent;
-            return node === conditional.whenTrue || node === conditional.whenFalse ? getContextualType(conditional) : undefined;
+        function checkObjectLiteralMethod(node, checkMode) {
+            // Grammar checking
+            checkGrammarMethod(node);
+            // Do not use hasDynamicName here, because that returns false for well known symbols.
+            // We want to perform checkComputedPropertyName for all computed properties, including
+            // well known symbols.
+            if (node.name.kind === 144 /* ComputedPropertyName */) {
+                checkComputedPropertyName(node.name);
+            }
+            var uninstantiatedType = checkFunctionExpressionOrObjectLiteralMethod(node, checkMode);
+            return instantiateTypeWithSingleGenericCallSignature(node, uninstantiatedType, checkMode);
         }
-        function getContextualTypeForJsxAttribute(attribute) {
-            var kind = attribute.kind;
-            var jsxElement = attribute.parent;
-            var attrsType = getJsxElementAttributesType(jsxElement);
-            if (attribute.kind === 246 /* JsxAttribute */) {
-                if (!attrsType || isTypeAny(attrsType)) {
-                    return undefined;
+        function instantiateTypeWithSingleGenericCallSignature(node, type, checkMode) {
+            if (checkMode === 2 /* Inferential */) {
+                var signature = getSingleCallSignature(type);
+                if (signature && signature.typeParameters) {
+                    var contextualType = getApparentTypeOfContextualType(node);
+                    if (contextualType) {
+                        var contextualSignature = getSingleCallSignature(getNonNullableType(contextualType));
+                        if (contextualSignature && !contextualSignature.typeParameters) {
+                            return getOrCreateTypeFromSignature(instantiateSignatureInContextOf(signature, contextualSignature, getContextualMapper(node)));
+                        }
+                    }
                 }
-                return getTypeOfPropertyOfType(attrsType, attribute.name.text);
-            }
-            else if (attribute.kind === 247 /* JsxSpreadAttribute */) {
-                return attrsType;
             }
-            ts.Debug.fail("Expected JsxAttribute or JsxSpreadAttribute, got ts.SyntaxKind[" + kind + "]");
-        }
-        // Return the contextual type for a given expression node. During overload resolution, a contextual type may temporarily
-        // be "pushed" onto a node using the contextualType property.
-        function getApparentTypeOfContextualType(node) {
-            var type = getContextualType(node);
-            return type && getApparentType(type);
+            return type;
         }
         /**
-         * Woah! Do you really want to use this function?
-         *
-         * Unless you're trying to get the *non-apparent* type for a
-         * value-literal type or you're authoring relevant portions of this algorithm,
-         * you probably meant to use 'getApparentTypeOfContextualType'.
-         * Otherwise this may not be very useful.
-         *
-         * In cases where you *are* working on this function, you should understand
-         * when it is appropriate to use 'getContextualType' and 'getApparentTypeOfContextualType'.
-         *
-         *   - Use 'getContextualType' when you are simply going to propagate the result to the expression.
-         *   - Use 'getApparentTypeOfContextualType' when you're going to need the members of the type.
-         *
-         * @param node the expression whose contextual type will be returned.
-         * @returns the contextual type of an expression.
+         * Returns the type of an expression. Unlike checkExpression, this function is simply concerned
+         * with computing the type and may not fully check all contained sub-expressions for errors.
+         * A cache argument of true indicates that if the function performs a full type check, it is ok
+         * to cache the result.
          */
-        function getContextualType(node) {
-            if (isInsideWithStatementBody(node)) {
-                // We cannot answer semantic questions within a with block, do not proceed any further
-                return undefined;
+        function getTypeOfExpression(node, cache) {
+            // Optimize for the common case of a call to a function with a single non-generic call
+            // signature where we can just fetch the return type without checking the arguments.
+            if (node.kind === 181 /* CallExpression */ && node.expression.kind !== 97 /* SuperKeyword */ && !ts.isRequireCall(node, /*checkArgumentIsStringLiteral*/ true)) {
+                var funcType = checkNonNullExpression(node.expression);
+                var signature = getSingleCallSignature(funcType);
+                if (signature && !signature.typeParameters) {
+                    return getReturnTypeOfSignature(signature);
+                }
             }
-            if (node.contextualType) {
-                return node.contextualType;
+            // Otherwise simply call checkExpression. Ideally, the entire family of checkXXX functions
+            // should have a parameter that indicates whether full error checking is required such that
+            // we can perform the optimizations locally.
+            return cache ? checkExpressionCached(node) : checkExpression(node);
+        }
+        /**
+         * Returns the type of an expression. Unlike checkExpression, this function is simply concerned
+         * with computing the type and may not fully check all contained sub-expressions for errors.
+         * It is intended for uses where you know there is no contextual type,
+         * and requesting the contextual type might cause a circularity or other bad behaviour.
+         * It sets the contextual type of the node to any before calling getTypeOfExpression.
+         */
+        function getContextFreeTypeOfExpression(node) {
+            var saveContextualType = node.contextualType;
+            node.contextualType = anyType;
+            var type = getTypeOfExpression(node);
+            node.contextualType = saveContextualType;
+            return type;
+        }
+        // Checks an expression and returns its type. The contextualMapper parameter serves two purposes: When
+        // contextualMapper is not undefined and not equal to the identityMapper function object it indicates that the
+        // expression is being inferentially typed (section 4.15.2 in spec) and provides the type mapper to use in
+        // conjunction with the generic contextual type. When contextualMapper is equal to the identityMapper function
+        // object, it serves as an indicator that all contained function and arrow expressions should be considered to
+        // have the wildcard function type; this form of type check is used during overload resolution to exclude
+        // contextually typed function and arrow expressions in the initial phase.
+        function checkExpression(node, checkMode) {
+            var type;
+            if (node.kind === 143 /* QualifiedName */) {
+                type = checkQualifiedName(node);
             }
-            var parent = node.parent;
-            switch (parent.kind) {
-                case 218 /* VariableDeclaration */:
-                case 142 /* Parameter */:
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
-                case 169 /* BindingElement */:
-                    return getContextualTypeForInitializerExpression(node);
-                case 180 /* ArrowFunction */:
-                case 211 /* ReturnStatement */:
-                    return getContextualTypeForReturnExpression(node);
-                case 190 /* YieldExpression */:
-                    return getContextualTypeForYieldOperand(parent);
-                case 174 /* CallExpression */:
-                case 175 /* NewExpression */:
-                    return getContextualTypeForArgument(parent, node);
-                case 177 /* TypeAssertionExpression */:
-                case 195 /* AsExpression */:
-                    return getTypeFromTypeNode(parent.type);
-                case 187 /* BinaryExpression */:
-                    return getContextualTypeForBinaryOperand(node);
-                case 253 /* PropertyAssignment */:
-                case 254 /* ShorthandPropertyAssignment */:
-                    return getContextualTypeForObjectLiteralElement(parent);
-                case 170 /* ArrayLiteralExpression */:
-                    return getContextualTypeForElementExpression(node);
-                case 188 /* ConditionalExpression */:
-                    return getContextualTypeForConditionalOperand(node);
-                case 197 /* TemplateSpan */:
-                    ts.Debug.assert(parent.parent.kind === 189 /* TemplateExpression */);
-                    return getContextualTypeForSubstitutionExpression(parent.parent, node);
-                case 178 /* ParenthesizedExpression */:
-                    return getContextualType(parent);
-                case 248 /* JsxExpression */:
-                    return getContextualType(parent);
-                case 246 /* JsxAttribute */:
-                case 247 /* JsxSpreadAttribute */:
-                    return getContextualTypeForJsxAttribute(parent);
+            else {
+                var uninstantiatedType = checkExpressionWorker(node, checkMode);
+                type = instantiateTypeWithSingleGenericCallSignature(node, uninstantiatedType, checkMode);
             }
-            return undefined;
-        }
-        // If the given type is an object or union type, if that type has a single signature, and if
-        // that signature is non-generic, return the signature. Otherwise return undefined.
-        function getNonGenericSignature(type) {
-            var signatures = getSignaturesOfStructuredType(type, 0 /* Call */);
-            if (signatures.length === 1) {
-                var signature = signatures[0];
-                if (!signature.typeParameters) {
-                    return signature;
+            if (isConstEnumObjectType(type)) {
+                // enum object type for const enums are only permitted in:
+                // - 'left' in property access
+                // - 'object' in indexed access
+                // - target in rhs of import statement
+                var ok = (node.parent.kind === 179 /* PropertyAccessExpression */ && node.parent.expression === node) ||
+                    (node.parent.kind === 180 /* ElementAccessExpression */ && node.parent.expression === node) ||
+                    ((node.kind === 71 /* Identifier */ || node.kind === 143 /* QualifiedName */) && isInRightSideOfImportOrExportAssignment(node));
+                if (!ok) {
+                    error(node, ts.Diagnostics.const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_import_declaration_or_export_assignment);
                 }
             }
+            return type;
         }
-        function isFunctionExpressionOrArrowFunction(node) {
-            return node.kind === 179 /* FunctionExpression */ || node.kind === 180 /* ArrowFunction */;
-        }
-        function getContextualSignatureForFunctionLikeDeclaration(node) {
-            // Only function expressions, arrow functions, and object literal methods are contextually typed.
-            return isFunctionExpressionOrArrowFunction(node) || ts.isObjectLiteralMethod(node)
-                ? getContextualSignature(node)
-                : undefined;
+        function checkExpressionWorker(node, checkMode) {
+            switch (node.kind) {
+                case 71 /* Identifier */:
+                    return checkIdentifier(node);
+                case 99 /* ThisKeyword */:
+                    return checkThisExpression(node);
+                case 97 /* SuperKeyword */:
+                    return checkSuperExpression(node);
+                case 95 /* NullKeyword */:
+                    return nullWideningType;
+                case 9 /* StringLiteral */:
+                case 8 /* NumericLiteral */:
+                case 101 /* TrueKeyword */:
+                case 86 /* FalseKeyword */:
+                    return checkLiteralExpression(node);
+                case 196 /* TemplateExpression */:
+                    return checkTemplateExpression(node);
+                case 13 /* NoSubstitutionTemplateLiteral */:
+                    return stringType;
+                case 12 /* RegularExpressionLiteral */:
+                    return globalRegExpType;
+                case 177 /* ArrayLiteralExpression */:
+                    return checkArrayLiteral(node, checkMode);
+                case 178 /* ObjectLiteralExpression */:
+                    return checkObjectLiteral(node, checkMode);
+                case 179 /* PropertyAccessExpression */:
+                    return checkPropertyAccessExpression(node);
+                case 180 /* ElementAccessExpression */:
+                    return checkIndexedAccess(node);
+                case 181 /* CallExpression */:
+                    if (node.expression.kind === 91 /* ImportKeyword */) {
+                        return checkImportCallExpression(node);
+                    }
+                /* falls through */
+                case 182 /* NewExpression */:
+                    return checkCallExpression(node);
+                case 183 /* TaggedTemplateExpression */:
+                    return checkTaggedTemplateExpression(node);
+                case 185 /* ParenthesizedExpression */:
+                    return checkExpression(node.expression, checkMode);
+                case 199 /* ClassExpression */:
+                    return checkClassExpression(node);
+                case 186 /* FunctionExpression */:
+                case 187 /* ArrowFunction */:
+                    return checkFunctionExpressionOrObjectLiteralMethod(node, checkMode);
+                case 189 /* TypeOfExpression */:
+                    return checkTypeOfExpression(node);
+                case 184 /* TypeAssertionExpression */:
+                case 202 /* AsExpression */:
+                    return checkAssertion(node);
+                case 203 /* NonNullExpression */:
+                    return checkNonNullAssertion(node);
+                case 204 /* MetaProperty */:
+                    return checkMetaProperty(node);
+                case 188 /* DeleteExpression */:
+                    return checkDeleteExpression(node);
+                case 190 /* VoidExpression */:
+                    return checkVoidExpression(node);
+                case 191 /* AwaitExpression */:
+                    return checkAwaitExpression(node);
+                case 192 /* PrefixUnaryExpression */:
+                    return checkPrefixUnaryExpression(node);
+                case 193 /* PostfixUnaryExpression */:
+                    return checkPostfixUnaryExpression(node);
+                case 194 /* BinaryExpression */:
+                    return checkBinaryExpression(node, checkMode);
+                case 195 /* ConditionalExpression */:
+                    return checkConditionalExpression(node, checkMode);
+                case 198 /* SpreadElement */:
+                    return checkSpreadExpression(node, checkMode);
+                case 200 /* OmittedExpression */:
+                    return undefinedWideningType;
+                case 197 /* YieldExpression */:
+                    return checkYieldExpression(node);
+                case 256 /* JsxExpression */:
+                    return checkJsxExpression(node, checkMode);
+                case 249 /* JsxElement */:
+                    return checkJsxElement(node);
+                case 250 /* JsxSelfClosingElement */:
+                    return checkJsxSelfClosingElement(node);
+                case 254 /* JsxAttributes */:
+                    return checkJsxAttributes(node, checkMode);
+                case 251 /* JsxOpeningElement */:
+                    ts.Debug.fail("Shouldn't ever directly check a JsxOpeningElement");
+            }
+            return unknownType;
         }
-        function getContextualTypeForFunctionLikeDeclaration(node) {
-            return ts.isObjectLiteralMethod(node) ?
-                getContextualTypeForObjectLiteralMethod(node) :
-                getApparentTypeOfContextualType(node);
+        // DECLARATION AND STATEMENT TYPE CHECKING
+        function checkTypeParameter(node) {
+            // Grammar Checking
+            if (node.expression) {
+                grammarErrorOnFirstToken(node.expression, ts.Diagnostics.Type_expected);
+            }
+            checkSourceElement(node.constraint);
+            checkSourceElement(node.default);
+            var typeParameter = getDeclaredTypeOfTypeParameter(getSymbolOfNode(node));
+            if (!hasNonCircularBaseConstraint(typeParameter)) {
+                error(node.constraint, ts.Diagnostics.Type_parameter_0_has_a_circular_constraint, typeToString(typeParameter));
+            }
+            var constraintType = getConstraintOfTypeParameter(typeParameter);
+            var defaultType = getDefaultFromTypeParameter(typeParameter);
+            if (constraintType && defaultType) {
+                checkTypeAssignableTo(defaultType, getTypeWithThisArgument(constraintType, defaultType), node.default, ts.Diagnostics.Type_0_does_not_satisfy_the_constraint_1);
+            }
+            if (produceDiagnostics) {
+                checkTypeNameIsReserved(node.name, ts.Diagnostics.Type_parameter_name_cannot_be_0);
+            }
         }
-        // Return the contextual signature for a given expression node. A contextual type provides a
-        // contextual signature if it has a single call signature and if that call signature is non-generic.
-        // If the contextual type is a union type, get the signature from each type possible and if they are
-        // all identical ignoring their return type, the result is same signature but with return type as
-        // union type of return types from these signatures
-        function getContextualSignature(node) {
-            ts.Debug.assert(node.kind !== 147 /* MethodDeclaration */ || ts.isObjectLiteralMethod(node));
-            var type = getContextualTypeForFunctionLikeDeclaration(node);
-            if (!type) {
-                return undefined;
+        function checkParameter(node) {
+            // Grammar checking
+            // It is a SyntaxError if the Identifier "eval" or the Identifier "arguments" occurs as the
+            // Identifier in a PropertySetParameterList of a PropertyAssignment that is contained in strict code
+            // or if its FunctionBody is strict code(11.1.5).
+            // Grammar checking
+            checkGrammarDecorators(node) || checkGrammarModifiers(node);
+            checkVariableLikeDeclaration(node);
+            var func = ts.getContainingFunction(node);
+            if (ts.getModifierFlags(node) & 92 /* ParameterPropertyModifier */) {
+                func = ts.getContainingFunction(node);
+                if (!(func.kind === 152 /* Constructor */ && ts.nodeIsPresent(func.body))) {
+                    error(node, ts.Diagnostics.A_parameter_property_is_only_allowed_in_a_constructor_implementation);
+                }
             }
-            if (!(type.flags & 524288 /* Union */)) {
-                return getNonGenericSignature(type);
+            if (node.questionToken && ts.isBindingPattern(node.name) && func.body) {
+                error(node, ts.Diagnostics.A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature);
             }
-            var signatureList;
-            var types = type.types;
-            for (var _i = 0, types_13 = types; _i < types_13.length; _i++) {
-                var current = types_13[_i];
-                var signature = getNonGenericSignature(current);
-                if (signature) {
-                    if (!signatureList) {
-                        // This signature will contribute to contextual union signature
-                        signatureList = [signature];
-                    }
-                    else if (!compareSignaturesIdentical(signatureList[0], signature, /*partialMatch*/ false, /*ignoreThisTypes*/ true, /*ignoreReturnTypes*/ true, compareTypesIdentical)) {
-                        // Signatures aren't identical, do not use
-                        return undefined;
-                    }
-                    else {
-                        // Use this signature for contextual union signature
-                        signatureList.push(signature);
-                    }
+            if (node.name.text === "this") {
+                if (ts.indexOf(func.parameters, node) !== 0) {
+                    error(node, ts.Diagnostics.A_this_parameter_must_be_the_first_parameter);
+                }
+                if (func.kind === 152 /* Constructor */ || func.kind === 156 /* ConstructSignature */ || func.kind === 161 /* ConstructorType */) {
+                    error(node, ts.Diagnostics.A_constructor_cannot_have_a_this_parameter);
                 }
             }
-            // Result is union of signatures collected (return type is union of return types of this signature set)
-            var result;
-            if (signatureList) {
-                result = cloneSignature(signatureList[0]);
-                // Clear resolved return type we possibly got from cloneSignature
-                result.resolvedReturnType = undefined;
-                result.unionSignatures = signatureList;
+            // Only check rest parameter type if it's not a binding pattern. Since binding patterns are
+            // not allowed in a rest parameter, we already have an error from checkGrammarParameterList.
+            if (node.dotDotDotToken && !ts.isBindingPattern(node.name) && !isArrayType(getTypeOfSymbol(node.symbol))) {
+                error(node, ts.Diagnostics.A_rest_parameter_must_be_of_an_array_type);
             }
-            return result;
-        }
-        /**
-         * Detect if the mapper implies an inference context. Specifically, there are 4 possible values
-         * for a mapper. Let's go through each one of them:
-         *
-         *    1. undefined - this means we are not doing inferential typing, but we may do contextual typing,
-         *       which could cause us to assign a parameter a type
-         *    2. identityMapper - means we want to avoid assigning a parameter a type, whether or not we are in
-         *       inferential typing (context is undefined for the identityMapper)
-         *    3. a mapper created by createInferenceMapper - we are doing inferential typing, we want to assign
-         *       types to parameters and fix type parameters (context is defined)
-         *    4. an instantiation mapper created by createTypeMapper or createTypeEraser - this should never be
-         *       passed as the contextual mapper when checking an expression (context is undefined for these)
-         *
-         * isInferentialContext is detecting if we are in case 3
-         */
-        function isInferentialContext(mapper) {
-            return mapper && mapper.context;
-        }
-        function checkSpreadElementExpression(node, contextualMapper) {
-            // It is usually not safe to call checkExpressionCached if we can be contextually typing.
-            // You can tell that we are contextually typing because of the contextualMapper parameter.
-            // While it is true that a spread element can have a contextual type, it does not do anything
-            // with this type. It is neither affected by it, nor does it propagate it to its operand.
-            // So the fact that contextualMapper is passed is not important, because the operand of a spread
-            // element is not contextually typed.
-            var arrayOrIterableType = checkExpressionCached(node.expression, contextualMapper);
-            return checkIteratedTypeOrElementType(arrayOrIterableType, node.expression, /*allowStringInput*/ false);
         }
-        function hasDefaultValue(node) {
-            return (node.kind === 169 /* BindingElement */ && !!node.initializer) ||
-                (node.kind === 187 /* BinaryExpression */ && node.operatorToken.kind === 56 /* EqualsToken */);
-        }
-        function checkArrayLiteral(node, contextualMapper) {
-            var elements = node.elements;
-            var hasSpreadElement = false;
-            var elementTypes = [];
-            var inDestructuringPattern = ts.isAssignmentTarget(node);
-            for (var _i = 0, elements_1 = elements; _i < elements_1.length; _i++) {
-                var e = elements_1[_i];
-                if (inDestructuringPattern && e.kind === 191 /* SpreadElementExpression */) {
-                    // Given the following situation:
-                    //    var c: {};
-                    //    [...c] = ["", 0];
-                    //
-                    // c is represented in the tree as a spread element in an array literal.
-                    // But c really functions as a rest element, and its purpose is to provide
-                    // a contextual type for the right hand side of the assignment. Therefore,
-                    // instead of calling checkExpression on "...c", which will give an error
-                    // if c is not iterable/array-like, we need to act as if we are trying to
-                    // get the contextual element type from it. So we do something similar to
-                    // getContextualTypeForElementExpression, which will crucially not error
-                    // if there is no index type / iterated type.
-                    var restArrayType = checkExpression(e.expression, contextualMapper);
-                    var restElementType = getIndexTypeOfType(restArrayType, 1 /* Number */) ||
-                        (languageVersion >= 2 /* ES6 */ ? getElementTypeOfIterable(restArrayType, /*errorNode*/ undefined) : undefined);
-                    if (restElementType) {
-                        elementTypes.push(restElementType);
-                    }
-                }
-                else {
-                    var type = checkExpressionForMutableLocation(e, contextualMapper);
-                    elementTypes.push(type);
+        function getTypePredicateParameterIndex(parameterList, parameter) {
+            if (parameterList) {
+                for (var i = 0; i < parameterList.length; i++) {
+                    var param = parameterList[i];
+                    if (param.name.kind === 71 /* Identifier */ &&
+                        param.name.text === parameter.text) {
+                        return i;
+                    }
                 }
-                hasSpreadElement = hasSpreadElement || e.kind === 191 /* SpreadElementExpression */;
             }
-            if (!hasSpreadElement) {
-                // If array literal is actually a destructuring pattern, mark it as an implied type. We do this such
-                // that we get the same behavior for "var [x, y] = []" and "[x, y] = []".
-                if (inDestructuringPattern && elementTypes.length) {
-                    var type = cloneTypeReference(createTupleType(elementTypes));
-                    type.pattern = node;
-                    return type;
+            return -1;
+        }
+        function checkTypePredicate(node) {
+            var parent = getTypePredicateParent(node);
+            if (!parent) {
+                // The parent must not be valid.
+                error(node, ts.Diagnostics.A_type_predicate_is_only_allowed_in_return_type_position_for_functions_and_methods);
+                return;
+            }
+            var typePredicate = getSignatureFromDeclaration(parent).typePredicate;
+            if (!typePredicate) {
+                return;
+            }
+            var parameterName = node.parameterName;
+            if (ts.isThisTypePredicate(typePredicate)) {
+                getTypeFromThisTypeNode(parameterName);
+            }
+            else {
+                if (typePredicate.parameterIndex >= 0) {
+                    if (parent.parameters[typePredicate.parameterIndex].dotDotDotToken) {
+                        error(parameterName, ts.Diagnostics.A_type_predicate_cannot_reference_a_rest_parameter);
+                    }
+                    else {
+                        var leadingError = ts.chainDiagnosticMessages(/*details*/ undefined, ts.Diagnostics.A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type);
+                        checkTypeAssignableTo(typePredicate.type, getTypeOfNode(parent.parameters[typePredicate.parameterIndex]), node.type, 
+                        /*headMessage*/ undefined, leadingError);
+                    }
                 }
-                var contextualType = getApparentTypeOfContextualType(node);
-                if (contextualType && contextualTypeIsTupleLikeType(contextualType)) {
-                    var pattern = contextualType.pattern;
-                    // If array literal is contextually typed by a binding pattern or an assignment pattern, pad the resulting
-                    // tuple type with the corresponding binding or assignment element types to make the lengths equal.
-                    if (pattern && (pattern.kind === 168 /* ArrayBindingPattern */ || pattern.kind === 170 /* ArrayLiteralExpression */)) {
-                        var patternElements = pattern.elements;
-                        for (var i = elementTypes.length; i < patternElements.length; i++) {
-                            var patternElement = patternElements[i];
-                            if (hasDefaultValue(patternElement)) {
-                                elementTypes.push(contextualType.typeArguments[i]);
-                            }
-                            else {
-                                if (patternElement.kind !== 193 /* OmittedExpression */) {
-                                    error(patternElement, ts.Diagnostics.Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value);
-                                }
-                                elementTypes.push(unknownType);
-                            }
+                else if (parameterName) {
+                    var hasReportedError = false;
+                    for (var _i = 0, _a = parent.parameters; _i < _a.length; _i++) {
+                        var name_24 = _a[_i].name;
+                        if (ts.isBindingPattern(name_24) &&
+                            checkIfTypePredicateVariableIsDeclaredInBindingPattern(name_24, parameterName, typePredicate.parameterName)) {
+                            hasReportedError = true;
+                            break;
                         }
                     }
-                    if (elementTypes.length) {
-                        return createTupleType(elementTypes);
+                    if (!hasReportedError) {
+                        error(node.parameterName, ts.Diagnostics.Cannot_find_parameter_0, typePredicate.parameterName);
                     }
                 }
             }
-            return createArrayType(elementTypes.length ?
-                getUnionType(elementTypes, /*subtypeReduction*/ true) :
-                strictNullChecks ? neverType : undefinedWideningType);
-        }
-        function isNumericName(name) {
-            return name.kind === 140 /* ComputedPropertyName */ ? isNumericComputedName(name) : isNumericLiteralName(name.text);
-        }
-        function isNumericComputedName(name) {
-            // It seems odd to consider an expression of type Any to result in a numeric name,
-            // but this behavior is consistent with checkIndexedAccess
-            return isTypeAnyOrAllConstituentTypesHaveKind(checkComputedPropertyName(name), 340 /* NumberLike */);
-        }
-        function isTypeAnyOrAllConstituentTypesHaveKind(type, kind) {
-            return isTypeAny(type) || isTypeOfKind(type, kind);
         }
-        function isInfinityOrNaNString(name) {
-            return name === "Infinity" || name === "-Infinity" || name === "NaN";
-        }
-        function isNumericLiteralName(name) {
-            // The intent of numeric names is that
-            //     - they are names with text in a numeric form, and that
-            //     - setting properties/indexing with them is always equivalent to doing so with the numeric literal 'numLit',
-            //         acquired by applying the abstract 'ToNumber' operation on the name's text.
-            //
-            // The subtlety is in the latter portion, as we cannot reliably say that anything that looks like a numeric literal is a numeric name.
-            // In fact, it is the case that the text of the name must be equal to 'ToString(numLit)' for this to hold.
-            //
-            // Consider the property name '"0xF00D"'. When one indexes with '0xF00D', they are actually indexing with the value of 'ToString(0xF00D)'
-            // according to the ECMAScript specification, so it is actually as if the user indexed with the string '"61453"'.
-            // Thus, the text of all numeric literals equivalent to '61543' such as '0xF00D', '0xf00D', '0170015', etc. are not valid numeric names
-            // because their 'ToString' representation is not equal to their original text.
-            // This is motivated by ECMA-262 sections 9.3.1, 9.8.1, 11.1.5, and 11.2.1.
-            //
-            // Here, we test whether 'ToString(ToNumber(name))' is exactly equal to 'name'.
-            // The '+' prefix operator is equivalent here to applying the abstract ToNumber operation.
-            // Applying the 'toString()' method on a number gives us the abstract ToString operation on a number.
-            //
-            // Note that this accepts the values 'Infinity', '-Infinity', and 'NaN', and that this is intentional.
-            // This is desired behavior, because when indexing with them as numeric entities, you are indexing
-            // with the strings '"Infinity"', '"-Infinity"', and '"NaN"' respectively.
-            return (+name).toString() === name;
+        function getTypePredicateParent(node) {
+            switch (node.parent.kind) {
+                case 187 /* ArrowFunction */:
+                case 155 /* CallSignature */:
+                case 228 /* FunctionDeclaration */:
+                case 186 /* FunctionExpression */:
+                case 160 /* FunctionType */:
+                case 151 /* MethodDeclaration */:
+                case 150 /* MethodSignature */:
+                    var parent_13 = node.parent;
+                    if (node === parent_13.type) {
+                        return parent_13;
+                    }
+            }
         }
-        function checkComputedPropertyName(node) {
-            var links = getNodeLinks(node.expression);
-            if (!links.resolvedType) {
-                links.resolvedType = checkExpression(node.expression);
-                // This will allow types number, string, symbol or any. It will also allow enums, the unknown
-                // type, and any union of these types (like string | number).
-                if (!isTypeAnyOrAllConstituentTypesHaveKind(links.resolvedType, 340 /* NumberLike */ | 34 /* StringLike */ | 512 /* ESSymbol */)) {
-                    error(node, ts.Diagnostics.A_computed_property_name_must_be_of_type_string_number_symbol_or_any);
+        function checkIfTypePredicateVariableIsDeclaredInBindingPattern(pattern, predicateVariableNode, predicateVariableName) {
+            for (var _i = 0, _a = pattern.elements; _i < _a.length; _i++) {
+                var element = _a[_i];
+                if (ts.isOmittedExpression(element)) {
+                    continue;
                 }
-                else {
-                    checkThatExpressionIsProperSymbolReference(node.expression, links.resolvedType, /*reportError*/ true);
+                var name_25 = element.name;
+                if (name_25.kind === 71 /* Identifier */ &&
+                    name_25.text === predicateVariableName) {
+                    error(predicateVariableNode, ts.Diagnostics.A_type_predicate_cannot_reference_element_0_in_a_binding_pattern, predicateVariableName);
+                    return true;
                 }
-            }
-            return links.resolvedType;
-        }
-        function getObjectLiteralIndexInfo(node, properties, kind) {
-            var propTypes = [];
-            for (var i = 0; i < properties.length; i++) {
-                if (kind === 0 /* String */ || isNumericName(node.properties[i].name)) {
-                    propTypes.push(getTypeOfSymbol(properties[i]));
+                else if (name_25.kind === 175 /* ArrayBindingPattern */ ||
+                    name_25.kind === 174 /* ObjectBindingPattern */) {
+                    if (checkIfTypePredicateVariableIsDeclaredInBindingPattern(name_25, predicateVariableNode, predicateVariableName)) {
+                        return true;
+                    }
                 }
             }
-            var unionType = propTypes.length ? getUnionType(propTypes, /*subtypeReduction*/ true) : undefinedType;
-            return createIndexInfo(unionType, /*isReadonly*/ false);
         }
-        function checkObjectLiteral(node, contextualMapper) {
-            var inDestructuringPattern = ts.isAssignmentTarget(node);
+        function checkSignatureDeclaration(node) {
             // Grammar checking
-            checkGrammarObjectLiteralExpression(node, inDestructuringPattern);
-            var propertiesTable = ts.createMap();
-            var propertiesArray = [];
-            var contextualType = getApparentTypeOfContextualType(node);
-            var contextualTypeHasPattern = contextualType && contextualType.pattern &&
-                (contextualType.pattern.kind === 167 /* ObjectBindingPattern */ || contextualType.pattern.kind === 171 /* ObjectLiteralExpression */);
-            var typeFlags = 0;
-            var patternWithComputedProperties = false;
-            var hasComputedStringProperty = false;
-            var hasComputedNumberProperty = false;
-            for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
-                var memberDecl = _a[_i];
-                var member = memberDecl.symbol;
-                if (memberDecl.kind === 253 /* PropertyAssignment */ ||
-                    memberDecl.kind === 254 /* ShorthandPropertyAssignment */ ||
-                    ts.isObjectLiteralMethod(memberDecl)) {
-                    var type = void 0;
-                    if (memberDecl.kind === 253 /* PropertyAssignment */) {
-                        type = checkPropertyAssignment(memberDecl, contextualMapper);
-                    }
-                    else if (memberDecl.kind === 147 /* MethodDeclaration */) {
-                        type = checkObjectLiteralMethod(memberDecl, contextualMapper);
-                    }
-                    else {
-                        ts.Debug.assert(memberDecl.kind === 254 /* ShorthandPropertyAssignment */);
-                        type = checkExpressionForMutableLocation(memberDecl.name, contextualMapper);
-                    }
-                    typeFlags |= type.flags;
-                    var prop = createSymbol(4 /* Property */ | 67108864 /* Transient */ | member.flags, member.name);
-                    if (inDestructuringPattern) {
-                        // If object literal is an assignment pattern and if the assignment pattern specifies a default value
-                        // for the property, make the property optional.
-                        var isOptional = (memberDecl.kind === 253 /* PropertyAssignment */ && hasDefaultValue(memberDecl.initializer)) ||
-                            (memberDecl.kind === 254 /* ShorthandPropertyAssignment */ && memberDecl.objectAssignmentInitializer);
-                        if (isOptional) {
-                            prop.flags |= 536870912 /* Optional */;
-                        }
-                        if (ts.hasDynamicName(memberDecl)) {
-                            patternWithComputedProperties = true;
-                        }
+            if (node.kind === 157 /* IndexSignature */) {
+                checkGrammarIndexSignature(node);
+            }
+            else if (node.kind === 160 /* FunctionType */ || node.kind === 228 /* FunctionDeclaration */ || node.kind === 161 /* ConstructorType */ ||
+                node.kind === 155 /* CallSignature */ || node.kind === 152 /* Constructor */ ||
+                node.kind === 156 /* ConstructSignature */) {
+                checkGrammarFunctionLikeDeclaration(node);
+            }
+            var functionFlags = ts.getFunctionFlags(node);
+            if (!(functionFlags & 4 /* Invalid */)) {
+                // Async generators prior to ESNext require the __await and __asyncGenerator helpers
+                if ((functionFlags & 3 /* AsyncGenerator */) === 3 /* AsyncGenerator */ && languageVersion < 5 /* ESNext */) {
+                    checkExternalEmitHelpers(node, 6144 /* AsyncGeneratorIncludes */);
+                }
+                // Async functions prior to ES2017 require the __awaiter helper
+                if ((functionFlags & 3 /* AsyncGenerator */) === 2 /* Async */ && languageVersion < 4 /* ES2017 */) {
+                    checkExternalEmitHelpers(node, 64 /* Awaiter */);
+                }
+                // Generator functions, Async functions, and Async Generator functions prior to
+                // ES2015 require the __generator helper
+                if ((functionFlags & 3 /* AsyncGenerator */) !== 0 /* Normal */ && languageVersion < 2 /* ES2015 */) {
+                    checkExternalEmitHelpers(node, 128 /* Generator */);
+                }
+            }
+            checkTypeParameters(node.typeParameters);
+            ts.forEach(node.parameters, checkParameter);
+            // TODO(rbuckton): Should we start checking JSDoc types?
+            if (node.type) {
+                checkSourceElement(node.type);
+            }
+            if (produceDiagnostics) {
+                checkCollisionWithArgumentsInGeneratedCode(node);
+                var returnTypeNode = ts.getEffectiveReturnTypeNode(node);
+                if (noImplicitAny && !returnTypeNode) {
+                    switch (node.kind) {
+                        case 156 /* ConstructSignature */:
+                            error(node, ts.Diagnostics.Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type);
+                            break;
+                        case 155 /* CallSignature */:
+                            error(node, ts.Diagnostics.Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type);
+                            break;
                     }
-                    else if (contextualTypeHasPattern && !(contextualType.flags & 536870912 /* ObjectLiteralPatternWithComputedProperties */)) {
-                        // If object literal is contextually typed by the implied type of a binding pattern, and if the
-                        // binding pattern specifies a default value for the property, make the property optional.
-                        var impliedProp = getPropertyOfType(contextualType, member.name);
-                        if (impliedProp) {
-                            prop.flags |= impliedProp.flags & 536870912 /* Optional */;
+                }
+                if (returnTypeNode) {
+                    var functionFlags_1 = ts.getFunctionFlags(node);
+                    if ((functionFlags_1 & (4 /* Invalid */ | 1 /* Generator */)) === 1 /* Generator */) {
+                        var returnType = getTypeFromTypeNode(returnTypeNode);
+                        if (returnType === voidType) {
+                            error(returnTypeNode, ts.Diagnostics.A_generator_cannot_have_a_void_type_annotation);
                         }
-                        else if (!compilerOptions.suppressExcessPropertyErrors) {
-                            error(memberDecl.name, ts.Diagnostics.Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1, symbolToString(member), typeToString(contextualType));
+                        else {
+                            var generatorElementType = getIteratedTypeOfGenerator(returnType, (functionFlags_1 & 2 /* Async */) !== 0) || anyType;
+                            var iterableIteratorInstantiation = functionFlags_1 & 2 /* Async */
+                                ? createAsyncIterableIteratorType(generatorElementType) // AsyncGenerator function
+                                : createIterableIteratorType(generatorElementType); // Generator function
+                            // Naively, one could check that IterableIterator<any> is assignable to the return type annotation.
+                            // However, that would not catch the error in the following case.
+                            //
+                            //    interface BadGenerator extends Iterable<number>, Iterator<string> { }
+                            //    function* g(): BadGenerator { } // Iterable and Iterator have different types!
+                            //
+                            checkTypeAssignableTo(iterableIteratorInstantiation, returnType, returnTypeNode);
                         }
                     }
-                    prop.declarations = member.declarations;
-                    prop.parent = member.parent;
-                    if (member.valueDeclaration) {
-                        prop.valueDeclaration = member.valueDeclaration;
+                    else if ((functionFlags_1 & 3 /* AsyncGenerator */) === 2 /* Async */) {
+                        checkAsyncFunctionReturnType(node);
                     }
-                    prop.type = type;
-                    prop.target = member;
-                    member = prop;
                 }
-                else {
-                    // TypeScript 1.0 spec (April 2014)
-                    // A get accessor declaration is processed in the same manner as
-                    // an ordinary function declaration(section 6.1) with no parameters.
-                    // A set accessor declaration is processed in the same manner
-                    // as an ordinary function declaration with a single parameter and a Void return type.
-                    ts.Debug.assert(memberDecl.kind === 149 /* GetAccessor */ || memberDecl.kind === 150 /* SetAccessor */);
-                    checkAccessorDeclaration(memberDecl);
+                if (noUnusedIdentifiers && !node.body) {
+                    checkUnusedTypeParameters(node);
                 }
-                if (ts.hasDynamicName(memberDecl)) {
-                    if (isNumericName(memberDecl.name)) {
-                        hasComputedNumberProperty = true;
-                    }
-                    else {
-                        hasComputedStringProperty = true;
+            }
+        }
+        function checkClassForDuplicateDeclarations(node) {
+            var Declaration;
+            (function (Declaration) {
+                Declaration[Declaration["Getter"] = 1] = "Getter";
+                Declaration[Declaration["Setter"] = 2] = "Setter";
+                Declaration[Declaration["Method"] = 4] = "Method";
+                Declaration[Declaration["Property"] = 3] = "Property";
+            })(Declaration || (Declaration = {}));
+            var instanceNames = ts.createMap();
+            var staticNames = ts.createMap();
+            for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
+                var member = _a[_i];
+                if (member.kind === 152 /* Constructor */) {
+                    for (var _b = 0, _c = member.parameters; _b < _c.length; _b++) {
+                        var param = _c[_b];
+                        if (ts.isParameterPropertyDeclaration(param)) {
+                            addName(instanceNames, param.name, param.name.text, 3 /* Property */);
+                        }
                     }
                 }
                 else {
-                    propertiesTable[member.name] = member;
+                    var isStatic = ts.getModifierFlags(member) & 32 /* Static */;
+                    var names = isStatic ? staticNames : instanceNames;
+                    var memberName = member.name && ts.getPropertyNameForPropertyNameNode(member.name);
+                    if (memberName) {
+                        switch (member.kind) {
+                            case 153 /* GetAccessor */:
+                                addName(names, member.name, memberName, 1 /* Getter */);
+                                break;
+                            case 154 /* SetAccessor */:
+                                addName(names, member.name, memberName, 2 /* Setter */);
+                                break;
+                            case 149 /* PropertyDeclaration */:
+                                addName(names, member.name, memberName, 3 /* Property */);
+                                break;
+                            case 151 /* MethodDeclaration */:
+                                addName(names, member.name, memberName, 4 /* Method */);
+                                break;
+                        }
+                    }
                 }
-                propertiesArray.push(member);
             }
-            // If object literal is contextually typed by the implied type of a binding pattern, augment the result
-            // type with those properties for which the binding pattern specifies a default value.
-            if (contextualTypeHasPattern) {
-                for (var _b = 0, _c = getPropertiesOfType(contextualType); _b < _c.length; _b++) {
-                    var prop = _c[_b];
-                    if (!propertiesTable[prop.name]) {
-                        if (!(prop.flags & 536870912 /* Optional */)) {
-                            error(prop.valueDeclaration || prop.bindingElement, ts.Diagnostics.Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value);
+            function addName(names, location, name, meaning) {
+                var prev = names.get(name);
+                if (prev) {
+                    if (prev & 4 /* Method */) {
+                        if (meaning !== 4 /* Method */) {
+                            error(location, ts.Diagnostics.Duplicate_identifier_0, ts.getTextOfNode(location));
                         }
-                        propertiesTable[prop.name] = prop;
-                        propertiesArray.push(prop);
+                    }
+                    else if (prev & meaning) {
+                        error(location, ts.Diagnostics.Duplicate_identifier_0, ts.getTextOfNode(location));
+                    }
+                    else {
+                        names.set(name, prev | meaning);
                     }
                 }
-            }
-            var stringIndexInfo = hasComputedStringProperty ? getObjectLiteralIndexInfo(node, propertiesArray, 0 /* String */) : undefined;
-            var numberIndexInfo = hasComputedNumberProperty ? getObjectLiteralIndexInfo(node, propertiesArray, 1 /* Number */) : undefined;
-            var result = createAnonymousType(node.symbol, propertiesTable, emptyArray, emptyArray, stringIndexInfo, numberIndexInfo);
-            var freshObjectLiteralFlag = compilerOptions.suppressExcessPropertyErrors ? 0 : 16777216 /* FreshLiteral */;
-            result.flags |= 8388608 /* ObjectLiteral */ | 67108864 /* ContainsObjectLiteral */ | freshObjectLiteralFlag | (typeFlags & 234881024 /* PropagatingFlags */) | (patternWithComputedProperties ? 536870912 /* ObjectLiteralPatternWithComputedProperties */ : 0);
-            if (inDestructuringPattern) {
-                result.pattern = node;
-            }
-            return result;
-        }
-        function checkJsxSelfClosingElement(node) {
-            checkJsxOpeningLikeElement(node);
-            return jsxElementType || anyType;
-        }
-        function checkJsxElement(node) {
-            // Check attributes
-            checkJsxOpeningLikeElement(node.openingElement);
-            // Perform resolution on the closing tag so that rename/go to definition/etc work
-            if (isJsxIntrinsicIdentifier(node.closingElement.tagName)) {
-                getIntrinsicTagSymbol(node.closingElement);
-            }
-            else {
-                checkExpression(node.closingElement.tagName);
-            }
-            // Check children
-            for (var _i = 0, _a = node.children; _i < _a.length; _i++) {
-                var child = _a[_i];
-                switch (child.kind) {
-                    case 248 /* JsxExpression */:
-                        checkJsxExpression(child);
-                        break;
-                    case 241 /* JsxElement */:
-                        checkJsxElement(child);
-                        break;
-                    case 242 /* JsxSelfClosingElement */:
-                        checkJsxSelfClosingElement(child);
-                        break;
+                else {
+                    names.set(name, meaning);
                 }
             }
-            return jsxElementType || anyType;
-        }
-        /**
-         * Returns true iff the JSX element name would be a valid JS identifier, ignoring restrictions about keywords not being identifiers
-         */
-        function isUnhyphenatedJsxName(name) {
-            // - is the only character supported in JSX attribute names that isn't valid in JavaScript identifiers
-            return name.indexOf("-") < 0;
         }
         /**
-         * Returns true iff React would emit this tag name as a string rather than an identifier or qualified name
+         * Static members being set on a constructor function may conflict with built-in properties
+         * of Function. Esp. in ECMAScript 5 there are non-configurable and non-writable
+         * built-in properties. This check issues a transpile error when a class has a static
+         * member with the same name as a non-writable built-in property.
+         *
+         * @see http://www.ecma-international.org/ecma-262/5.1/#sec-15.3.3
+         * @see http://www.ecma-international.org/ecma-262/5.1/#sec-15.3.5
+         * @see http://www.ecma-international.org/ecma-262/6.0/#sec-properties-of-the-function-constructor
+         * @see http://www.ecma-international.org/ecma-262/6.0/#sec-function-instances
          */
-        function isJsxIntrinsicIdentifier(tagName) {
-            // TODO (yuisu): comment
-            if (tagName.kind === 172 /* PropertyAccessExpression */ || tagName.kind === 97 /* ThisKeyword */) {
-                return false;
-            }
-            else {
-                return ts.isIntrinsicJsxName(tagName.text);
+        function checkClassForStaticPropertyNameConflicts(node) {
+            for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
+                var member = _a[_i];
+                var memberNameNode = member.name;
+                var isStatic = ts.getModifierFlags(member) & 32 /* Static */;
+                if (isStatic && memberNameNode) {
+                    var memberName = ts.getPropertyNameForPropertyNameNode(memberNameNode);
+                    switch (memberName) {
+                        case "name":
+                        case "length":
+                        case "caller":
+                        case "arguments":
+                        case "prototype":
+                            var message = ts.Diagnostics.Static_property_0_conflicts_with_built_in_property_Function_0_of_constructor_function_1;
+                            var className = getNameOfSymbol(getSymbolOfNode(node));
+                            error(memberNameNode, message, memberName, className);
+                            break;
+                    }
+                }
             }
         }
-        function checkJsxAttribute(node, elementAttributesType, nameTable) {
-            var correspondingPropType = undefined;
-            // Look up the corresponding property for this attribute
-            if (elementAttributesType === emptyObjectType && isUnhyphenatedJsxName(node.name.text)) {
-                // If there is no 'props' property, you may not have non-"data-" attributes
-                error(node.parent, ts.Diagnostics.JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property, getJsxElementPropertiesName());
-            }
-            else if (elementAttributesType && !isTypeAny(elementAttributesType)) {
-                var correspondingPropSymbol = getPropertyOfType(elementAttributesType, node.name.text);
-                correspondingPropType = correspondingPropSymbol && getTypeOfSymbol(correspondingPropSymbol);
-                if (isUnhyphenatedJsxName(node.name.text)) {
-                    var attributeType = getTypeOfPropertyOfType(elementAttributesType, getTextOfPropertyName(node.name)) || getIndexTypeOfType(elementAttributesType, 0 /* String */);
-                    if (attributeType) {
-                        correspondingPropType = attributeType;
+        function checkObjectTypeForDuplicateDeclarations(node) {
+            var names = ts.createMap();
+            for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
+                var member = _a[_i];
+                if (member.kind === 148 /* PropertySignature */) {
+                    var memberName = void 0;
+                    switch (member.name.kind) {
+                        case 9 /* StringLiteral */:
+                        case 8 /* NumericLiteral */:
+                        case 71 /* Identifier */:
+                            memberName = member.name.text;
+                            break;
+                        default:
+                            continue;
+                    }
+                    if (names.get(memberName)) {
+                        error(ts.getNameOfDeclaration(member.symbol.valueDeclaration), ts.Diagnostics.Duplicate_identifier_0, memberName);
+                        error(member.name, ts.Diagnostics.Duplicate_identifier_0, memberName);
                     }
                     else {
-                        // If there's no corresponding property with this name, error
-                        if (!correspondingPropType) {
-                            error(node.name, ts.Diagnostics.Property_0_does_not_exist_on_type_1, node.name.text, typeToString(elementAttributesType));
-                            return unknownType;
-                        }
+                        names.set(memberName, true);
                     }
                 }
             }
-            var exprType;
-            if (node.initializer) {
-                exprType = checkExpression(node.initializer);
-            }
-            else {
-                // <Elem attr /> is sugar for <Elem attr={true} />
-                exprType = booleanType;
-            }
-            if (correspondingPropType) {
-                checkTypeAssignableTo(exprType, correspondingPropType, node);
-            }
-            nameTable[node.name.text] = true;
-            return exprType;
         }
-        function checkJsxSpreadAttribute(node, elementAttributesType, nameTable) {
-            var type = checkExpression(node.expression);
-            var props = getPropertiesOfType(type);
-            for (var _i = 0, props_2 = props; _i < props_2.length; _i++) {
-                var prop = props_2[_i];
-                // Is there a corresponding property in the element attributes type? Skip checking of properties
-                // that have already been assigned to, as these are not actually pushed into the resulting type
-                if (!nameTable[prop.name]) {
-                    var targetPropSym = getPropertyOfType(elementAttributesType, prop.name);
-                    if (targetPropSym) {
-                        var msg = ts.chainDiagnosticMessages(undefined, ts.Diagnostics.Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property, prop.name);
-                        checkTypeAssignableTo(getTypeOfSymbol(prop), getTypeOfSymbol(targetPropSym), node, undefined, msg);
+        function checkTypeForDuplicateIndexSignatures(node) {
+            if (node.kind === 230 /* InterfaceDeclaration */) {
+                var nodeSymbol = getSymbolOfNode(node);
+                // in case of merging interface declaration it is possible that we'll enter this check procedure several times for every declaration
+                // to prevent this run check only for the first declaration of a given kind
+                if (nodeSymbol.declarations.length > 0 && nodeSymbol.declarations[0] !== node) {
+                    return;
+                }
+            }
+            // TypeScript 1.0 spec (April 2014)
+            // 3.7.4: An object type can contain at most one string index signature and one numeric index signature.
+            // 8.5: A class declaration can have at most one string index member declaration and one numeric index member declaration
+            var indexSymbol = getIndexSymbol(getSymbolOfNode(node));
+            if (indexSymbol) {
+                var seenNumericIndexer = false;
+                var seenStringIndexer = false;
+                for (var _i = 0, _a = indexSymbol.declarations; _i < _a.length; _i++) {
+                    var decl = _a[_i];
+                    var declaration = decl;
+                    if (declaration.parameters.length === 1 && declaration.parameters[0].type) {
+                        switch (declaration.parameters[0].type.kind) {
+                            case 136 /* StringKeyword */:
+                                if (!seenStringIndexer) {
+                                    seenStringIndexer = true;
+                                }
+                                else {
+                                    error(declaration, ts.Diagnostics.Duplicate_string_index_signature);
+                                }
+                                break;
+                            case 133 /* NumberKeyword */:
+                                if (!seenNumericIndexer) {
+                                    seenNumericIndexer = true;
+                                }
+                                else {
+                                    error(declaration, ts.Diagnostics.Duplicate_number_index_signature);
+                                }
+                                break;
+                        }
                     }
-                    nameTable[prop.name] = true;
                 }
             }
-            return type;
         }
-        function getJsxType(name) {
-            if (jsxTypes[name] === undefined) {
-                return jsxTypes[name] = getExportedTypeFromNamespace(JsxNames.JSX, name) || unknownType;
-            }
-            return jsxTypes[name];
+        function checkPropertyDeclaration(node) {
+            // Grammar checking
+            checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarProperty(node) || checkGrammarComputedPropertyName(node.name);
+            checkVariableLikeDeclaration(node);
         }
-        /**
-          * Looks up an intrinsic tag name and returns a symbol that either points to an intrinsic
-          * property (in which case nodeLinks.jsxFlags will be IntrinsicNamedElement) or an intrinsic
-          * string index signature (in which case nodeLinks.jsxFlags will be IntrinsicIndexedElement).
-          * May also return unknownSymbol if both of these lookups fail.
-          */
-        function getIntrinsicTagSymbol(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedSymbol) {
-                var intrinsicElementsType = getJsxType(JsxNames.IntrinsicElements);
-                if (intrinsicElementsType !== unknownType) {
-                    // Property case
-                    var intrinsicProp = getPropertyOfType(intrinsicElementsType, node.tagName.text);
-                    if (intrinsicProp) {
-                        links.jsxFlags |= 1 /* IntrinsicNamedElement */;
-                        return links.resolvedSymbol = intrinsicProp;
-                    }
-                    // Intrinsic string indexer case
-                    var indexSignatureType = getIndexTypeOfType(intrinsicElementsType, 0 /* String */);
-                    if (indexSignatureType) {
-                        links.jsxFlags |= 2 /* IntrinsicIndexedElement */;
-                        return links.resolvedSymbol = intrinsicElementsType.symbol;
-                    }
-                    // Wasn't found
-                    error(node, ts.Diagnostics.Property_0_does_not_exist_on_type_1, node.tagName.text, "JSX." + JsxNames.IntrinsicElements);
-                    return links.resolvedSymbol = unknownSymbol;
-                }
-                else {
-                    if (compilerOptions.noImplicitAny) {
-                        error(node, ts.Diagnostics.JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists, JsxNames.IntrinsicElements);
-                    }
-                    return links.resolvedSymbol = unknownSymbol;
-                }
+        function checkMethodDeclaration(node) {
+            // Grammar checking
+            checkGrammarMethod(node) || checkGrammarComputedPropertyName(node.name);
+            // Grammar checking for modifiers is done inside the function checkGrammarFunctionLikeDeclaration
+            checkFunctionOrMethodDeclaration(node);
+            // Abstract methods cannot have an implementation.
+            // Extra checks are to avoid reporting multiple errors relating to the "abstractness" of the node.
+            if (ts.getModifierFlags(node) & 128 /* Abstract */ && node.body) {
+                error(node, ts.Diagnostics.Method_0_cannot_have_an_implementation_because_it_is_marked_abstract, ts.declarationNameToString(node.name));
             }
-            return links.resolvedSymbol;
         }
-        /**
-         * Given a JSX element that is a class element, finds the Element Instance Type. If the
-         * element is not a class element, or the class element type cannot be determined, returns 'undefined'.
-         * For example, in the element <MyClass>, the element instance type is `MyClass` (not `typeof MyClass`).
-         */
-        function getJsxElementInstanceType(node, valueType) {
-            ts.Debug.assert(!(valueType.flags & 524288 /* Union */));
-            if (isTypeAny(valueType)) {
-                // Short-circuit if the class tag is using an element type 'any'
-                return anyType;
+        function checkConstructorDeclaration(node) {
+            // Grammar check on signature of constructor and modifier of the constructor is done in checkSignatureDeclaration function.
+            checkSignatureDeclaration(node);
+            // Grammar check for checking only related to constructorDeclaration
+            checkGrammarConstructorTypeParameters(node) || checkGrammarConstructorTypeAnnotation(node);
+            checkSourceElement(node.body);
+            registerForUnusedIdentifiersCheck(node);
+            var symbol = getSymbolOfNode(node);
+            var firstDeclaration = ts.getDeclarationOfKind(symbol, node.kind);
+            // Only type check the symbol once
+            if (node === firstDeclaration) {
+                checkFunctionOrConstructorSymbol(symbol);
             }
-            // Resolve the signatures, preferring constructor
-            var signatures = getSignaturesOfType(valueType, 1 /* Construct */);
-            if (signatures.length === 0) {
-                // No construct signatures, try call signatures
-                signatures = getSignaturesOfType(valueType, 0 /* Call */);
-                if (signatures.length === 0) {
-                    // We found no signatures at all, which is an error
-                    error(node.tagName, ts.Diagnostics.JSX_element_type_0_does_not_have_any_construct_or_call_signatures, ts.getTextOfNode(node.tagName));
-                    return unknownType;
-                }
+            // exit early in the case of signature - super checks are not relevant to them
+            if (ts.nodeIsMissing(node.body)) {
+                return;
             }
-            return getUnionType(signatures.map(getReturnTypeOfSignature), /*subtypeReduction*/ true);
-        }
-        /// e.g. "props" for React.d.ts,
-        /// or 'undefined' if ElementAttributesProperty doesn't exist (which means all
-        ///     non-intrinsic elements' attributes type is 'any'),
-        /// or '' if it has 0 properties (which means every
-        ///     non-intrinsic elements' attributes type is the element instance type)
-        function getJsxElementPropertiesName() {
-            // JSX
-            var jsxNamespace = getGlobalSymbol(JsxNames.JSX, 1920 /* Namespace */, /*diagnosticMessage*/ undefined);
-            // JSX.ElementAttributesProperty [symbol]
-            var attribsPropTypeSym = jsxNamespace && getSymbol(jsxNamespace.exports, JsxNames.ElementAttributesPropertyNameContainer, 793064 /* Type */);
-            // JSX.ElementAttributesProperty [type]
-            var attribPropType = attribsPropTypeSym && getDeclaredTypeOfSymbol(attribsPropTypeSym);
-            // The properties of JSX.ElementAttributesProperty
-            var attribProperties = attribPropType && getPropertiesOfType(attribPropType);
-            if (attribProperties) {
-                // Element Attributes has zero properties, so the element attributes type will be the class instance type
-                if (attribProperties.length === 0) {
-                    return "";
+            if (!produceDiagnostics) {
+                return;
+            }
+            function containsSuperCallAsComputedPropertyName(n) {
+                var name = ts.getNameOfDeclaration(n);
+                return name && containsSuperCall(name);
+            }
+            function containsSuperCall(n) {
+                if (ts.isSuperCall(n)) {
+                    return true;
                 }
-                else if (attribProperties.length === 1) {
-                    return attribProperties[0].name;
+                else if (ts.isFunctionLike(n)) {
+                    return false;
                 }
-                else {
-                    error(attribsPropTypeSym.declarations[0], ts.Diagnostics.The_global_type_JSX_0_may_not_have_more_than_one_property, JsxNames.ElementAttributesPropertyNameContainer);
-                    return undefined;
+                else if (ts.isClassLike(n)) {
+                    return ts.forEach(n.members, containsSuperCallAsComputedPropertyName);
                 }
+                return ts.forEachChild(n, containsSuperCall);
             }
-            else {
-                // No interface exists, so the element attributes type will be an implicit any
-                return undefined;
-            }
-        }
-        /**
-         * Given React element instance type and the class type, resolve the Jsx type
-         * Pass elemType to handle individual type in the union typed element type.
-         */
-        function getResolvedJsxType(node, elemType, elemClassType) {
-            if (!elemType) {
-                elemType = checkExpression(node.tagName);
-            }
-            if (elemType.flags & 524288 /* Union */) {
-                var types = elemType.types;
-                return getUnionType(types.map(function (type) {
-                    return getResolvedJsxType(node, type, elemClassType);
-                }), /*subtypeReduction*/ true);
+            function markThisReferencesAsErrors(n) {
+                if (n.kind === 99 /* ThisKeyword */) {
+                    error(n, ts.Diagnostics.this_cannot_be_referenced_in_current_location);
+                }
+                else if (n.kind !== 186 /* FunctionExpression */ && n.kind !== 228 /* FunctionDeclaration */) {
+                    ts.forEachChild(n, markThisReferencesAsErrors);
+                }
             }
-            // If the elemType is a string type, we have to return anyType to prevent an error downstream as we will try to find construct or call signature of the type
-            if (elemType.flags & 2 /* String */) {
-                return anyType;
+            function isInstancePropertyWithInitializer(n) {
+                return n.kind === 149 /* PropertyDeclaration */ &&
+                    !(ts.getModifierFlags(n) & 32 /* Static */) &&
+                    !!n.initializer;
             }
-            else if (elemType.flags & 32 /* StringLiteral */) {
-                // If the elemType is a stringLiteral type, we can then provide a check to make sure that the string literal type is one of the Jsx intrinsic element type
-                var intrinsicElementsType = getJsxType(JsxNames.IntrinsicElements);
-                if (intrinsicElementsType !== unknownType) {
-                    var stringLiteralTypeName = elemType.text;
-                    var intrinsicProp = getPropertyOfType(intrinsicElementsType, stringLiteralTypeName);
-                    if (intrinsicProp) {
-                        return getTypeOfSymbol(intrinsicProp);
+            // TS 1.0 spec (April 2014): 8.3.2
+            // Constructors of classes with no extends clause may not contain super calls, whereas
+            // constructors of derived classes must contain at least one super call somewhere in their function body.
+            var containingClassDecl = node.parent;
+            if (ts.getClassExtendsHeritageClauseElement(containingClassDecl)) {
+                captureLexicalThis(node.parent, containingClassDecl);
+                var classExtendsNull = classDeclarationExtendsNull(containingClassDecl);
+                var superCall = getSuperCallInConstructor(node);
+                if (superCall) {
+                    if (classExtendsNull) {
+                        error(superCall, ts.Diagnostics.A_constructor_cannot_contain_a_super_call_when_its_class_extends_null);
                     }
-                    var indexSignatureType = getIndexTypeOfType(intrinsicElementsType, 0 /* String */);
-                    if (indexSignatureType) {
-                        return indexSignatureType;
+                    // The first statement in the body of a constructor (excluding prologue directives) must be a super call
+                    // if both of the following are true:
+                    // - The containing class is a derived class.
+                    // - The constructor declares parameter properties
+                    //   or the containing class declares instance member variables with initializers.
+                    var superCallShouldBeFirst = ts.forEach(node.parent.members, isInstancePropertyWithInitializer) ||
+                        ts.forEach(node.parameters, function (p) { return ts.getModifierFlags(p) & 92 /* ParameterPropertyModifier */; });
+                    // Skip past any prologue directives to find the first statement
+                    // to ensure that it was a super call.
+                    if (superCallShouldBeFirst) {
+                        var statements = node.body.statements;
+                        var superCallStatement = void 0;
+                        for (var _i = 0, statements_2 = statements; _i < statements_2.length; _i++) {
+                            var statement = statements_2[_i];
+                            if (statement.kind === 210 /* ExpressionStatement */ && ts.isSuperCall(statement.expression)) {
+                                superCallStatement = statement;
+                                break;
+                            }
+                            if (!ts.isPrologueDirective(statement)) {
+                                break;
+                            }
+                        }
+                        if (!superCallStatement) {
+                            error(node, ts.Diagnostics.A_super_call_must_be_the_first_statement_in_the_constructor_when_a_class_contains_initialized_properties_or_has_parameter_properties);
+                        }
                     }
-                    error(node, ts.Diagnostics.Property_0_does_not_exist_on_type_1, stringLiteralTypeName, "JSX." + JsxNames.IntrinsicElements);
                 }
-                // If we need to report an error, we already done so here. So just return any to prevent any more error downstream
-                return anyType;
+                else if (!classExtendsNull) {
+                    error(node, ts.Diagnostics.Constructors_for_derived_classes_must_contain_a_super_call);
+                }
             }
-            // Get the element instance type (the result of newing or invoking this tag)
-            var elemInstanceType = getJsxElementInstanceType(node, elemType);
-            if (!elemClassType || !isTypeAssignableTo(elemInstanceType, elemClassType)) {
-                // Is this is a stateless function component? See if its single signature's return type is
-                // assignable to the JSX Element Type
-                if (jsxElementType) {
-                    var callSignatures = elemType && getSignaturesOfType(elemType, 0 /* Call */);
-                    var callSignature = callSignatures && callSignatures.length > 0 && callSignatures[0];
-                    var callReturnType = callSignature && getReturnTypeOfSignature(callSignature);
-                    var paramType = callReturnType && (callSignature.parameters.length === 0 ? emptyObjectType : getTypeOfSymbol(callSignature.parameters[0]));
-                    if (callReturnType && isTypeAssignableTo(callReturnType, jsxElementType)) {
-                        // Intersect in JSX.IntrinsicAttributes if it exists
-                        var intrinsicAttributes = getJsxType(JsxNames.IntrinsicAttributes);
-                        if (intrinsicAttributes !== unknownType) {
-                            paramType = intersectTypes(intrinsicAttributes, paramType);
+        }
+        function checkAccessorDeclaration(node) {
+            if (produceDiagnostics) {
+                // Grammar checking accessors
+                checkGrammarFunctionLikeDeclaration(node) || checkGrammarAccessor(node) || checkGrammarComputedPropertyName(node.name);
+                checkDecorators(node);
+                checkSignatureDeclaration(node);
+                if (node.kind === 153 /* GetAccessor */) {
+                    if (!ts.isInAmbientContext(node) && ts.nodeIsPresent(node.body) && (node.flags & 128 /* HasImplicitReturn */)) {
+                        if (!(node.flags & 256 /* HasExplicitReturn */)) {
+                            error(node.name, ts.Diagnostics.A_get_accessor_must_return_a_value);
                         }
-                        return paramType;
                     }
                 }
-            }
-            // Issue an error if this return type isn't assignable to JSX.ElementClass
-            if (elemClassType) {
-                checkTypeRelatedTo(elemInstanceType, elemClassType, assignableRelation, node, ts.Diagnostics.JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements);
-            }
-            if (isTypeAny(elemInstanceType)) {
-                return elemInstanceType;
-            }
-            var propsName = getJsxElementPropertiesName();
-            if (propsName === undefined) {
-                // There is no type ElementAttributesProperty, return 'any'
-                return anyType;
-            }
-            else if (propsName === "") {
-                // If there is no e.g. 'props' member in ElementAttributesProperty, use the element class type instead
-                return elemInstanceType;
-            }
-            else {
-                var attributesType = getTypeOfPropertyOfType(elemInstanceType, propsName);
-                if (!attributesType) {
-                    // There is no property named 'props' on this instance type
-                    return emptyObjectType;
-                }
-                else if (isTypeAny(attributesType) || (attributesType === unknownType)) {
-                    // Props is of type 'any' or unknown
-                    return attributesType;
-                }
-                else if (attributesType.flags & 524288 /* Union */) {
-                    // Props cannot be a union type
-                    error(node.tagName, ts.Diagnostics.JSX_element_attributes_type_0_may_not_be_a_union_type, typeToString(attributesType));
-                    return anyType;
+                // Do not use hasDynamicName here, because that returns false for well known symbols.
+                // We want to perform checkComputedPropertyName for all computed properties, including
+                // well known symbols.
+                if (node.name.kind === 144 /* ComputedPropertyName */) {
+                    checkComputedPropertyName(node.name);
                 }
-                else {
-                    // Normal case -- add in IntrinsicClassElements<T> and IntrinsicElements
-                    var apparentAttributesType = attributesType;
-                    var intrinsicClassAttribs = getJsxType(JsxNames.IntrinsicClassAttributes);
-                    if (intrinsicClassAttribs !== unknownType) {
-                        var typeParams = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(intrinsicClassAttribs.symbol);
-                        if (typeParams) {
-                            if (typeParams.length === 1) {
-                                apparentAttributesType = intersectTypes(createTypeReference(intrinsicClassAttribs, [elemInstanceType]), apparentAttributesType);
-                            }
+                if (!ts.hasDynamicName(node)) {
+                    // TypeScript 1.0 spec (April 2014): 8.4.3
+                    // Accessors for the same member name must specify the same accessibility.
+                    var otherKind = node.kind === 153 /* GetAccessor */ ? 154 /* SetAccessor */ : 153 /* GetAccessor */;
+                    var otherAccessor = ts.getDeclarationOfKind(node.symbol, otherKind);
+                    if (otherAccessor) {
+                        if ((ts.getModifierFlags(node) & 28 /* AccessibilityModifier */) !== (ts.getModifierFlags(otherAccessor) & 28 /* AccessibilityModifier */)) {
+                            error(node.name, ts.Diagnostics.Getter_and_setter_accessors_do_not_agree_in_visibility);
                         }
-                        else {
-                            apparentAttributesType = intersectTypes(attributesType, intrinsicClassAttribs);
+                        if (ts.hasModifier(node, 128 /* Abstract */) !== ts.hasModifier(otherAccessor, 128 /* Abstract */)) {
+                            error(node.name, ts.Diagnostics.Accessors_must_both_be_abstract_or_non_abstract);
                         }
-                    }
-                    var intrinsicAttribs = getJsxType(JsxNames.IntrinsicAttributes);
-                    if (intrinsicAttribs !== unknownType) {
-                        apparentAttributesType = intersectTypes(intrinsicAttribs, apparentAttributesType);
-                    }
-                    return apparentAttributesType;
-                }
-            }
-        }
-        /**
-         * Given an opening/self-closing element, get the 'element attributes type', i.e. the type that tells
-         * us which attributes are valid on a given element.
-         */
-        function getJsxElementAttributesType(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedJsxType) {
-                if (isJsxIntrinsicIdentifier(node.tagName)) {
-                    var symbol = getIntrinsicTagSymbol(node);
-                    if (links.jsxFlags & 1 /* IntrinsicNamedElement */) {
-                        return links.resolvedJsxType = getTypeOfSymbol(symbol);
-                    }
-                    else if (links.jsxFlags & 2 /* IntrinsicIndexedElement */) {
-                        return links.resolvedJsxType = getIndexInfoOfSymbol(symbol, 0 /* String */).type;
-                    }
-                    else {
-                        return links.resolvedJsxType = unknownType;
+                        // TypeScript 1.0 spec (April 2014): 4.5
+                        // If both accessors include type annotations, the specified types must be identical.
+                        checkAccessorDeclarationTypesIdentical(node, otherAccessor, getAnnotatedAccessorType, ts.Diagnostics.get_and_set_accessor_must_have_the_same_type);
+                        checkAccessorDeclarationTypesIdentical(node, otherAccessor, getThisTypeOfDeclaration, ts.Diagnostics.get_and_set_accessor_must_have_the_same_this_type);
                     }
                 }
-                else {
-                    var elemClassType = getJsxGlobalElementClassType();
-                    return links.resolvedJsxType = getResolvedJsxType(node, undefined, elemClassType);
+                var returnType = getTypeOfAccessors(getSymbolOfNode(node));
+                if (node.kind === 153 /* GetAccessor */) {
+                    checkAllCodePathsInNonVoidFunctionReturnOrThrow(node, returnType);
                 }
             }
-            return links.resolvedJsxType;
-        }
-        /**
-         * Given a JSX attribute, returns the symbol for the corresponds property
-         * of the element attributes type. Will return unknownSymbol for attributes
-         * that have no matching element attributes type property.
-         */
-        function getJsxAttributePropertySymbol(attrib) {
-            var attributesType = getJsxElementAttributesType(attrib.parent);
-            var prop = getPropertyOfType(attributesType, attrib.name.text);
-            return prop || unknownSymbol;
+            checkSourceElement(node.body);
+            registerForUnusedIdentifiersCheck(node);
         }
-        function getJsxGlobalElementClassType() {
-            if (!jsxElementClassType) {
-                jsxElementClassType = getExportedTypeFromNamespace(JsxNames.JSX, JsxNames.ElementClass);
+        function checkAccessorDeclarationTypesIdentical(first, second, getAnnotatedType, message) {
+            var firstType = getAnnotatedType(first);
+            var secondType = getAnnotatedType(second);
+            if (firstType && secondType && !isTypeIdenticalTo(firstType, secondType)) {
+                error(first, message);
             }
-            return jsxElementClassType;
         }
-        /// Returns all the properties of the Jsx.IntrinsicElements interface
-        function getJsxIntrinsicTagNames() {
-            var intrinsics = getJsxType(JsxNames.IntrinsicElements);
-            return intrinsics ? getPropertiesOfType(intrinsics) : emptyArray;
+        function checkMissingDeclaration(node) {
+            checkDecorators(node);
         }
-        function checkJsxPreconditions(errorNode) {
-            // Preconditions for using JSX
-            if ((compilerOptions.jsx || 0 /* None */) === 0 /* None */) {
-                error(errorNode, ts.Diagnostics.Cannot_use_JSX_unless_the_jsx_flag_is_provided);
-            }
-            if (jsxElementType === undefined) {
-                if (compilerOptions.noImplicitAny) {
-                    error(errorNode, ts.Diagnostics.JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist);
+        function checkTypeArgumentConstraints(typeParameters, typeArgumentNodes) {
+            var minTypeArgumentCount = getMinTypeArgumentCount(typeParameters);
+            var typeArguments;
+            var mapper;
+            var result = true;
+            for (var i = 0; i < typeParameters.length; i++) {
+                var constraint = getConstraintOfTypeParameter(typeParameters[i]);
+                if (constraint) {
+                    if (!typeArguments) {
+                        typeArguments = fillMissingTypeArguments(ts.map(typeArgumentNodes, getTypeFromTypeNode), typeParameters, minTypeArgumentCount);
+                        mapper = createTypeMapper(typeParameters, typeArguments);
+                    }
+                    var typeArgument = typeArguments[i];
+                    result = result && checkTypeAssignableTo(typeArgument, getTypeWithThisArgument(instantiateType(constraint, mapper), typeArgument), typeArgumentNodes[i], ts.Diagnostics.Type_0_does_not_satisfy_the_constraint_1);
                 }
             }
+            return result;
         }
-        function checkJsxOpeningLikeElement(node) {
-            checkGrammarJsxElement(node);
-            checkJsxPreconditions(node);
-            // The reactNamespace symbol should be marked as 'used' so we don't incorrectly elide its import. And if there
-            // is no reactNamespace symbol in scope when targeting React emit, we should issue an error.
-            var reactRefErr = compilerOptions.jsx === 2 /* React */ ? ts.Diagnostics.Cannot_find_name_0 : undefined;
-            var reactNamespace = compilerOptions.reactNamespace ? compilerOptions.reactNamespace : "React";
-            var reactSym = resolveName(node.tagName, reactNamespace, 107455 /* Value */, reactRefErr, reactNamespace);
-            if (reactSym) {
-                getSymbolLinks(reactSym).referenced = true;
-            }
-            var targetAttributesType = getJsxElementAttributesType(node);
-            var nameTable = ts.createMap();
-            // Process this array in right-to-left order so we know which
-            // attributes (mostly from spreads) are being overwritten and
-            // thus should have their types ignored
-            var sawSpreadedAny = false;
-            for (var i = node.attributes.length - 1; i >= 0; i--) {
-                if (node.attributes[i].kind === 246 /* JsxAttribute */) {
-                    checkJsxAttribute((node.attributes[i]), targetAttributesType, nameTable);
-                }
-                else {
-                    ts.Debug.assert(node.attributes[i].kind === 247 /* JsxSpreadAttribute */);
-                    var spreadType = checkJsxSpreadAttribute((node.attributes[i]), targetAttributesType, nameTable);
-                    if (isTypeAny(spreadType)) {
-                        sawSpreadedAny = true;
+        function checkTypeReferenceNode(node) {
+            checkGrammarTypeArguments(node, node.typeArguments);
+            var type = getTypeFromTypeReference(node);
+            if (type !== unknownType) {
+                if (node.typeArguments) {
+                    // Do type argument local checks only if referenced type is successfully resolved
+                    ts.forEach(node.typeArguments, checkSourceElement);
+                    if (produceDiagnostics) {
+                        var symbol = getNodeLinks(node).resolvedSymbol;
+                        var typeParameters = symbol.flags & 524288 /* TypeAlias */ ? getSymbolLinks(symbol).typeParameters : type.target.localTypeParameters;
+                        checkTypeArgumentConstraints(typeParameters, node.typeArguments);
                     }
                 }
-            }
-            // Check that all required properties have been provided. If an 'any'
-            // was spreaded in, though, assume that it provided all required properties
-            if (targetAttributesType && !sawSpreadedAny) {
-                var targetProperties = getPropertiesOfType(targetAttributesType);
-                for (var i = 0; i < targetProperties.length; i++) {
-                    if (!(targetProperties[i].flags & 536870912 /* Optional */) &&
-                        !nameTable[targetProperties[i].name]) {
-                        error(node, ts.Diagnostics.Property_0_is_missing_in_type_1, targetProperties[i].name, typeToString(targetAttributesType));
-                    }
+                if (type.flags & 16 /* Enum */ && getNodeLinks(node).resolvedSymbol.flags & 8 /* EnumMember */) {
+                    error(node, ts.Diagnostics.Enum_type_0_has_members_with_initializers_that_are_not_literals, typeToString(type));
                 }
             }
         }
-        function checkJsxExpression(node) {
-            if (node.expression) {
-                return checkExpression(node.expression);
-            }
-            else {
-                return unknownType;
+        function checkTypeQuery(node) {
+            getTypeFromTypeQueryNode(node);
+        }
+        function checkTypeLiteral(node) {
+            ts.forEach(node.members, checkSourceElement);
+            if (produceDiagnostics) {
+                var type = getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node);
+                checkIndexConstraints(type);
+                checkTypeForDuplicateIndexSignatures(node);
+                checkObjectTypeForDuplicateDeclarations(node);
             }
         }
-        // If a symbol is a synthesized symbol with no value declaration, we assume it is a property. Example of this are the synthesized
-        // '.prototype' property as well as synthesized tuple index properties.
-        function getDeclarationKindFromSymbol(s) {
-            return s.valueDeclaration ? s.valueDeclaration.kind : 145 /* PropertyDeclaration */;
+        function checkArrayType(node) {
+            checkSourceElement(node.elementType);
         }
-        function getDeclarationModifierFlagsFromSymbol(s) {
-            return s.valueDeclaration ? ts.getCombinedModifierFlags(s.valueDeclaration) : s.flags & 134217728 /* Prototype */ ? 4 /* Public */ | 32 /* Static */ : 0;
+        function checkTupleType(node) {
+            // Grammar checking
+            var hasErrorFromDisallowedTrailingComma = checkGrammarForDisallowedTrailingComma(node.elementTypes);
+            if (!hasErrorFromDisallowedTrailingComma && node.elementTypes.length === 0) {
+                grammarErrorOnNode(node, ts.Diagnostics.A_tuple_type_element_list_cannot_be_empty);
+            }
+            ts.forEach(node.elementTypes, checkSourceElement);
         }
-        function getDeclarationNodeFlagsFromSymbol(s) {
-            return s.valueDeclaration ? ts.getCombinedNodeFlags(s.valueDeclaration) : 0;
+        function checkUnionOrIntersectionType(node) {
+            ts.forEach(node.types, checkSourceElement);
         }
-        /**
-         * Check whether the requested property access is valid.
-         * Returns true if node is a valid property access, and false otherwise.
-         * @param node The node to be checked.
-         * @param left The left hand side of the property access (e.g.: the super in `super.foo`).
-         * @param type The type of left.
-         * @param prop The symbol for the right hand side of the property access.
-         */
-        function checkClassPropertyAccess(node, left, type, prop) {
-            var flags = getDeclarationModifierFlagsFromSymbol(prop);
-            var declaringClass = getDeclaredTypeOfSymbol(getParentOfSymbol(prop));
-            var errorNode = node.kind === 172 /* PropertyAccessExpression */ || node.kind === 218 /* VariableDeclaration */ ?
-                node.name :
-                node.right;
-            if (left.kind === 95 /* SuperKeyword */) {
-                // TS 1.0 spec (April 2014): 4.8.2
-                // - In a constructor, instance member function, instance member accessor, or
-                //   instance member variable initializer where this references a derived class instance,
-                //   a super property access is permitted and must specify a public instance member function of the base class.
-                // - In a static member function or static member accessor
-                //   where this references the constructor function object of a derived class,
-                //   a super property access is permitted and must specify a public static member function of the base class.
-                if (languageVersion < 2 /* ES6 */ && getDeclarationKindFromSymbol(prop) !== 147 /* MethodDeclaration */) {
-                    // `prop` refers to a *property* declared in the super class
-                    // rather than a *method*, so it does not satisfy the above criteria.
-                    error(errorNode, ts.Diagnostics.Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword);
-                    return false;
-                }
-                if (flags & 128 /* Abstract */) {
-                    // A method cannot be accessed in a super property access if the method is abstract.
-                    // This error could mask a private property access error. But, a member
-                    // cannot simultaneously be private and abstract, so this will trigger an
-                    // additional error elsewhere.
-                    error(errorNode, ts.Diagnostics.Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression, symbolToString(prop), typeToString(declaringClass));
-                    return false;
-                }
-            }
-            // Public properties are otherwise accessible.
-            if (!(flags & 24 /* NonPublicAccessibilityModifier */)) {
-                return true;
-            }
-            // Property is known to be private or protected at this point
-            // Private property is accessible if the property is within the declaring class
-            if (flags & 8 /* Private */) {
-                var declaringClassDeclaration = getClassLikeDeclarationOfSymbol(getParentOfSymbol(prop));
-                if (!isNodeWithinClass(node, declaringClassDeclaration)) {
-                    error(errorNode, ts.Diagnostics.Property_0_is_private_and_only_accessible_within_class_1, symbolToString(prop), typeToString(declaringClass));
-                    return false;
-                }
-                return true;
-            }
-            // Property is known to be protected at this point
-            // All protected properties of a supertype are accessible in a super access
-            if (left.kind === 95 /* SuperKeyword */) {
-                return true;
-            }
-            // Get the enclosing class that has the declaring class as its base type
-            var enclosingClass = forEachEnclosingClass(node, function (enclosingDeclaration) {
-                var enclosingClass = getDeclaredTypeOfSymbol(getSymbolOfNode(enclosingDeclaration));
-                return hasBaseType(enclosingClass, declaringClass) ? enclosingClass : undefined;
-            });
-            // A protected property is accessible if the property is within the declaring class or classes derived from it
-            if (!enclosingClass) {
-                error(errorNode, ts.Diagnostics.Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses, symbolToString(prop), typeToString(declaringClass));
-                return false;
-            }
-            // No further restrictions for static properties
-            if (flags & 32 /* Static */) {
-                return true;
-            }
-            // An instance property must be accessed through an instance of the enclosing class
-            if (type.flags & 268435456 /* ThisType */) {
-                // get the original type -- represented as the type constraint of the 'this' type
-                type = getConstraintOfTypeParameter(type);
+        function checkIndexedAccessIndexType(type, accessNode) {
+            if (!(type.flags & 524288 /* IndexedAccess */)) {
+                return type;
             }
-            // TODO: why is the first part of this check here?
-            if (!(getTargetType(type).flags & (32768 /* Class */ | 65536 /* Interface */) && hasBaseType(type, enclosingClass))) {
-                error(errorNode, ts.Diagnostics.Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1, symbolToString(prop), typeToString(enclosingClass));
-                return false;
+            // Check if the index type is assignable to 'keyof T' for the object type.
+            var objectType = type.objectType;
+            var indexType = type.indexType;
+            if (isTypeAssignableTo(indexType, getIndexType(objectType))) {
+                return type;
             }
-            return true;
-        }
-        function checkNonNullExpression(node) {
-            var type = checkExpression(node);
-            if (strictNullChecks) {
-                var kind = getFalsyFlags(type) & 6144 /* Nullable */;
-                if (kind) {
-                    error(node, kind & 2048 /* Undefined */ ? kind & 4096 /* Null */ ?
-                        ts.Diagnostics.Object_is_possibly_null_or_undefined :
-                        ts.Diagnostics.Object_is_possibly_undefined :
-                        ts.Diagnostics.Object_is_possibly_null);
+            // Check if we're indexing with a numeric type and the object type is a generic
+            // type with a constraint that has a numeric index signature.
+            if (maybeTypeOfKind(objectType, 540672 /* TypeVariable */) && isTypeOfKind(indexType, 84 /* NumberLike */)) {
+                var constraint = getBaseConstraintOfType(objectType);
+                if (constraint && getIndexInfoOfType(constraint, 1 /* Number */)) {
+                    return type;
                 }
-                return getNonNullableType(type);
             }
+            error(accessNode, ts.Diagnostics.Type_0_cannot_be_used_to_index_type_1, typeToString(indexType), typeToString(objectType));
             return type;
         }
-        function checkPropertyAccessExpression(node) {
-            return checkPropertyAccessExpressionOrQualifiedName(node, node.expression, node.name);
+        function checkIndexedAccessType(node) {
+            checkIndexedAccessIndexType(getTypeFromIndexedAccessTypeNode(node), node);
         }
-        function checkQualifiedName(node) {
-            return checkPropertyAccessExpressionOrQualifiedName(node, node.left, node.right);
+        function checkMappedType(node) {
+            checkSourceElement(node.typeParameter);
+            checkSourceElement(node.type);
+            var type = getTypeFromMappedTypeNode(node);
+            var constraintType = getConstraintTypeFromMappedType(type);
+            checkTypeAssignableTo(constraintType, stringType, node.typeParameter.constraint);
         }
-        function checkPropertyAccessExpressionOrQualifiedName(node, left, right) {
-            var type = checkNonNullExpression(left);
-            if (isTypeAny(type) || type === silentNeverType) {
-                return type;
+        function isPrivateWithinAmbient(node) {
+            return (ts.getModifierFlags(node) & 8 /* Private */) && ts.isInAmbientContext(node);
+        }
+        function getEffectiveDeclarationFlags(n, flagsToCheck) {
+            var flags = ts.getCombinedModifierFlags(n);
+            // children of classes (even ambient classes) should not be marked as ambient or export
+            // because those flags have no useful semantics there.
+            if (n.parent.kind !== 230 /* InterfaceDeclaration */ &&
+                n.parent.kind !== 229 /* ClassDeclaration */ &&
+                n.parent.kind !== 199 /* ClassExpression */ &&
+                ts.isInAmbientContext(n)) {
+                if (!(flags & 2 /* Ambient */)) {
+                    // It is nested in an ambient context, which means it is automatically exported
+                    flags |= 1 /* Export */;
+                }
+                flags |= 2 /* Ambient */;
             }
-            var apparentType = getApparentType(getWidenedType(type));
-            if (apparentType === unknownType || (type.flags & 16384 /* TypeParameter */ && isTypeAny(apparentType))) {
-                // handle cases when type is Type parameter with invalid or any constraint
-                return apparentType;
+            return flags & flagsToCheck;
+        }
+        function checkFunctionOrConstructorSymbol(symbol) {
+            if (!produceDiagnostics) {
+                return;
             }
-            var prop = getPropertyOfType(apparentType, right.text);
-            if (!prop) {
-                if (right.text && !checkAndReportErrorForExtendingInterface(node)) {
-                    reportNonexistentProperty(right, type.flags & 268435456 /* ThisType */ ? apparentType : type);
+            function getCanonicalOverload(overloads, implementation) {
+                // Consider the canonical set of flags to be the flags of the bodyDeclaration or the first declaration
+                // Error on all deviations from this canonical set of flags
+                // The caveat is that if some overloads are defined in lib.d.ts, we don't want to
+                // report the errors on those. To achieve this, we will say that the implementation is
+                // the canonical signature only if it is in the same container as the first overload
+                var implementationSharesContainerWithFirstOverload = implementation !== undefined && implementation.parent === overloads[0].parent;
+                return implementationSharesContainerWithFirstOverload ? implementation : overloads[0];
+            }
+            function checkFlagAgreementBetweenOverloads(overloads, implementation, flagsToCheck, someOverloadFlags, allOverloadFlags) {
+                // Error if some overloads have a flag that is not shared by all overloads. To find the
+                // deviations, we XOR someOverloadFlags with allOverloadFlags
+                var someButNotAllOverloadFlags = someOverloadFlags ^ allOverloadFlags;
+                if (someButNotAllOverloadFlags !== 0) {
+                    var canonicalFlags_1 = getEffectiveDeclarationFlags(getCanonicalOverload(overloads, implementation), flagsToCheck);
+                    ts.forEach(overloads, function (o) {
+                        var deviation = getEffectiveDeclarationFlags(o, flagsToCheck) ^ canonicalFlags_1;
+                        if (deviation & 1 /* Export */) {
+                            error(ts.getNameOfDeclaration(o), ts.Diagnostics.Overload_signatures_must_all_be_exported_or_non_exported);
+                        }
+                        else if (deviation & 2 /* Ambient */) {
+                            error(ts.getNameOfDeclaration(o), ts.Diagnostics.Overload_signatures_must_all_be_ambient_or_non_ambient);
+                        }
+                        else if (deviation & (8 /* Private */ | 16 /* Protected */)) {
+                            error(ts.getNameOfDeclaration(o) || o, ts.Diagnostics.Overload_signatures_must_all_be_public_private_or_protected);
+                        }
+                        else if (deviation & 128 /* Abstract */) {
+                            error(ts.getNameOfDeclaration(o), ts.Diagnostics.Overload_signatures_must_all_be_abstract_or_non_abstract);
+                        }
+                    });
                 }
-                return unknownType;
             }
-            if (noUnusedIdentifiers &&
-                (prop.flags & 106500 /* ClassMember */) &&
-                prop.valueDeclaration && (ts.getModifierFlags(prop.valueDeclaration) & 8 /* Private */)) {
-                if (prop.flags & 16777216 /* Instantiated */) {
-                    getSymbolLinks(prop).target.isReferenced = true;
+            function checkQuestionTokenAgreementBetweenOverloads(overloads, implementation, someHaveQuestionToken, allHaveQuestionToken) {
+                if (someHaveQuestionToken !== allHaveQuestionToken) {
+                    var canonicalHasQuestionToken_1 = ts.hasQuestionToken(getCanonicalOverload(overloads, implementation));
+                    ts.forEach(overloads, function (o) {
+                        var deviation = ts.hasQuestionToken(o) !== canonicalHasQuestionToken_1;
+                        if (deviation) {
+                            error(ts.getNameOfDeclaration(o), ts.Diagnostics.Overload_signatures_must_all_be_optional_or_required);
+                        }
+                    });
+                }
+            }
+            var flagsToCheck = 1 /* Export */ | 2 /* Ambient */ | 8 /* Private */ | 16 /* Protected */ | 128 /* Abstract */;
+            var someNodeFlags = 0 /* None */;
+            var allNodeFlags = flagsToCheck;
+            var someHaveQuestionToken = false;
+            var allHaveQuestionToken = true;
+            var hasOverloads = false;
+            var bodyDeclaration;
+            var lastSeenNonAmbientDeclaration;
+            var previousDeclaration;
+            var declarations = symbol.declarations;
+            var isConstructor = (symbol.flags & 16384 /* Constructor */) !== 0;
+            function reportImplementationExpectedError(node) {
+                if (node.name && ts.nodeIsMissing(node.name)) {
+                    return;
+                }
+                var seen = false;
+                var subsequentNode = ts.forEachChild(node.parent, function (c) {
+                    if (seen) {
+                        return c;
+                    }
+                    else {
+                        seen = c === node;
+                    }
+                });
+                // We may be here because of some extra nodes between overloads that could not be parsed into a valid node.
+                // In this case the subsequent node is not really consecutive (.pos !== node.end), and we must ignore it here.
+                if (subsequentNode && subsequentNode.pos === node.end) {
+                    if (subsequentNode.kind === node.kind) {
+                        var errorNode_1 = subsequentNode.name || subsequentNode;
+                        // TODO(jfreeman): These are methods, so handle computed name case
+                        if (node.name && subsequentNode.name && node.name.text === subsequentNode.name.text) {
+                            var reportError = (node.kind === 151 /* MethodDeclaration */ || node.kind === 150 /* MethodSignature */) &&
+                                (ts.getModifierFlags(node) & 32 /* Static */) !== (ts.getModifierFlags(subsequentNode) & 32 /* Static */);
+                            // we can get here in two cases
+                            // 1. mixed static and instance class members
+                            // 2. something with the same name was defined before the set of overloads that prevents them from merging
+                            // here we'll report error only for the first case since for second we should already report error in binder
+                            if (reportError) {
+                                var diagnostic = ts.getModifierFlags(node) & 32 /* Static */ ? ts.Diagnostics.Function_overload_must_be_static : ts.Diagnostics.Function_overload_must_not_be_static;
+                                error(errorNode_1, diagnostic);
+                            }
+                            return;
+                        }
+                        else if (ts.nodeIsPresent(subsequentNode.body)) {
+                            error(errorNode_1, ts.Diagnostics.Function_implementation_name_must_be_0, ts.declarationNameToString(node.name));
+                            return;
+                        }
+                    }
+                }
+                var errorNode = node.name || node;
+                if (isConstructor) {
+                    error(errorNode, ts.Diagnostics.Constructor_implementation_is_missing);
                 }
                 else {
-                    prop.isReferenced = true;
+                    // Report different errors regarding non-consecutive blocks of declarations depending on whether
+                    // the node in question is abstract.
+                    if (ts.getModifierFlags(node) & 128 /* Abstract */) {
+                        error(errorNode, ts.Diagnostics.All_declarations_of_an_abstract_method_must_be_consecutive);
+                    }
+                    else {
+                        error(errorNode, ts.Diagnostics.Function_implementation_is_missing_or_not_immediately_following_the_declaration);
+                    }
                 }
             }
-            getNodeLinks(node).resolvedSymbol = prop;
-            if (prop.parent && prop.parent.flags & 32 /* Class */) {
-                checkClassPropertyAccess(node, left, apparentType, prop);
-            }
-            var propType = getTypeOfSymbol(prop);
-            // Only compute control flow type if this is a property access expression that isn't an
-            // assignment target, and the referenced property was declared as a variable, property,
-            // accessor, or optional method.
-            if (node.kind !== 172 /* PropertyAccessExpression */ || ts.isAssignmentTarget(node) ||
-                !(prop.flags & (3 /* Variable */ | 4 /* Property */ | 98304 /* Accessor */)) &&
-                    !(prop.flags & 8192 /* Method */ && propType.flags & 524288 /* Union */)) {
-                return propType;
-            }
-            return getFlowTypeOfReference(node, propType, /*assumeInitialized*/ true, /*flowContainer*/ undefined);
-            function reportNonexistentProperty(propNode, containingType) {
-                var errorInfo;
-                if (containingType.flags & 524288 /* Union */ && !(containingType.flags & 8190 /* Primitive */)) {
-                    for (var _i = 0, _a = containingType.types; _i < _a.length; _i++) {
-                        var subtype = _a[_i];
-                        if (!getPropertyOfType(subtype, propNode.text)) {
-                            errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.Property_0_does_not_exist_on_type_1, ts.declarationNameToString(propNode), typeToString(subtype));
-                            break;
+            var duplicateFunctionDeclaration = false;
+            var multipleConstructorImplementation = false;
+            for (var _i = 0, declarations_5 = declarations; _i < declarations_5.length; _i++) {
+                var current = declarations_5[_i];
+                var node = current;
+                var inAmbientContext = ts.isInAmbientContext(node);
+                var inAmbientContextOrInterface = node.parent.kind === 230 /* InterfaceDeclaration */ || node.parent.kind === 163 /* TypeLiteral */ || inAmbientContext;
+                if (inAmbientContextOrInterface) {
+                    // check if declarations are consecutive only if they are non-ambient
+                    // 1. ambient declarations can be interleaved
+                    // i.e. this is legal
+                    //     declare function foo();
+                    //     declare function bar();
+                    //     declare function foo();
+                    // 2. mixing ambient and non-ambient declarations is a separate error that will be reported - do not want to report an extra one
+                    previousDeclaration = undefined;
+                }
+                if (node.kind === 228 /* FunctionDeclaration */ || node.kind === 151 /* MethodDeclaration */ || node.kind === 150 /* MethodSignature */ || node.kind === 152 /* Constructor */) {
+                    var currentNodeFlags = getEffectiveDeclarationFlags(node, flagsToCheck);
+                    someNodeFlags |= currentNodeFlags;
+                    allNodeFlags &= currentNodeFlags;
+                    someHaveQuestionToken = someHaveQuestionToken || ts.hasQuestionToken(node);
+                    allHaveQuestionToken = allHaveQuestionToken && ts.hasQuestionToken(node);
+                    if (ts.nodeIsPresent(node.body) && bodyDeclaration) {
+                        if (isConstructor) {
+                            multipleConstructorImplementation = true;
+                        }
+                        else {
+                            duplicateFunctionDeclaration = true;
+                        }
+                    }
+                    else if (previousDeclaration && previousDeclaration.parent === node.parent && previousDeclaration.end !== node.pos) {
+                        reportImplementationExpectedError(previousDeclaration);
+                    }
+                    if (ts.nodeIsPresent(node.body)) {
+                        if (!bodyDeclaration) {
+                            bodyDeclaration = node;
                         }
                     }
+                    else {
+                        hasOverloads = true;
+                    }
+                    previousDeclaration = node;
+                    if (!inAmbientContextOrInterface) {
+                        lastSeenNonAmbientDeclaration = node;
+                    }
                 }
-                errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.Property_0_does_not_exist_on_type_1, ts.declarationNameToString(propNode), typeToString(containingType));
-                diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(propNode, errorInfo));
             }
-        }
-        function isValidPropertyAccess(node, propertyName) {
-            var left = node.kind === 172 /* PropertyAccessExpression */
-                ? node.expression
-                : node.left;
-            var type = checkExpression(left);
-            if (type !== unknownType && !isTypeAny(type)) {
-                var prop = getPropertyOfType(getWidenedType(type), propertyName);
-                if (prop && prop.parent && prop.parent.flags & 32 /* Class */) {
-                    return checkClassPropertyAccess(node, left, type, prop);
-                }
+            if (multipleConstructorImplementation) {
+                ts.forEach(declarations, function (declaration) {
+                    error(declaration, ts.Diagnostics.Multiple_constructor_implementations_are_not_allowed);
+                });
             }
-            return true;
-        }
-        /**
-         * Return the symbol of the for-in variable declared or referenced by the given for-in statement.
-         */
-        function getForInVariableSymbol(node) {
-            var initializer = node.initializer;
-            if (initializer.kind === 219 /* VariableDeclarationList */) {
-                var variable = initializer.declarations[0];
-                if (variable && !ts.isBindingPattern(variable.name)) {
-                    return getSymbolOfNode(variable);
-                }
+            if (duplicateFunctionDeclaration) {
+                ts.forEach(declarations, function (declaration) {
+                    error(ts.getNameOfDeclaration(declaration), ts.Diagnostics.Duplicate_function_implementation);
+                });
             }
-            else if (initializer.kind === 69 /* Identifier */) {
-                return getResolvedSymbol(initializer);
+            // Abstract methods can't have an implementation -- in particular, they don't need one.
+            if (lastSeenNonAmbientDeclaration && !lastSeenNonAmbientDeclaration.body &&
+                !(ts.getModifierFlags(lastSeenNonAmbientDeclaration) & 128 /* Abstract */) && !lastSeenNonAmbientDeclaration.questionToken) {
+                reportImplementationExpectedError(lastSeenNonAmbientDeclaration);
             }
-            return undefined;
-        }
-        /**
-         * Return true if the given type is considered to have numeric property names.
-         */
-        function hasNumericPropertyNames(type) {
-            return getIndexTypeOfType(type, 1 /* Number */) && !getIndexTypeOfType(type, 0 /* String */);
-        }
-        /**
-         * Return true if given node is an expression consisting of an identifier (possibly parenthesized)
-         * that references a for-in variable for an object with numeric property names.
-         */
-        function isForInVariableForNumericPropertyNames(expr) {
-            var e = skipParenthesizedNodes(expr);
-            if (e.kind === 69 /* Identifier */) {
-                var symbol = getResolvedSymbol(e);
-                if (symbol.flags & 3 /* Variable */) {
-                    var child = expr;
-                    var node = expr.parent;
-                    while (node) {
-                        if (node.kind === 207 /* ForInStatement */ &&
-                            child === node.statement &&
-                            getForInVariableSymbol(node) === symbol &&
-                            hasNumericPropertyNames(checkExpression(node.expression))) {
-                            return true;
+            if (hasOverloads) {
+                checkFlagAgreementBetweenOverloads(declarations, bodyDeclaration, flagsToCheck, someNodeFlags, allNodeFlags);
+                checkQuestionTokenAgreementBetweenOverloads(declarations, bodyDeclaration, someHaveQuestionToken, allHaveQuestionToken);
+                if (bodyDeclaration) {
+                    var signatures = getSignaturesOfSymbol(symbol);
+                    var bodySignature = getSignatureFromDeclaration(bodyDeclaration);
+                    for (var _a = 0, signatures_7 = signatures; _a < signatures_7.length; _a++) {
+                        var signature = signatures_7[_a];
+                        if (!isImplementationCompatibleWithOverload(bodySignature, signature)) {
+                            error(signature.declaration, ts.Diagnostics.Overload_signature_is_not_compatible_with_function_implementation);
+                            break;
                         }
-                        child = node;
-                        node = node.parent;
                     }
                 }
             }
-            return false;
         }
-        function checkIndexedAccess(node) {
-            // Grammar checking
-            if (!node.argumentExpression) {
-                var sourceFile = ts.getSourceFileOfNode(node);
-                if (node.parent.kind === 175 /* NewExpression */ && node.parent.expression === node) {
-                    var start = ts.skipTrivia(sourceFile.text, node.expression.end);
-                    var end = node.end;
-                    grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead);
-                }
-                else {
-                    var start = node.end - "]".length;
-                    var end = node.end;
-                    grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.Expression_expected);
-                }
+        function checkExportsOnMergedDeclarations(node) {
+            if (!produceDiagnostics) {
+                return;
             }
-            // Obtain base constraint such that we can bail out if the constraint is an unknown type
-            var objectType = getApparentType(checkNonNullExpression(node.expression));
-            var indexType = node.argumentExpression ? checkExpression(node.argumentExpression) : unknownType;
-            if (objectType === unknownType || objectType === silentNeverType) {
-                return objectType;
+            // if localSymbol is defined on node then node itself is exported - check is required
+            var symbol = node.localSymbol;
+            if (!symbol) {
+                // local symbol is undefined => this declaration is non-exported.
+                // however symbol might contain other declarations that are exported
+                symbol = getSymbolOfNode(node);
+                if (!(symbol.flags & 7340032 /* Export */)) {
+                    // this is a pure local symbol (all declarations are non-exported) - no need to check anything
+                    return;
+                }
             }
-            var isConstEnum = isConstEnumObjectType(objectType);
-            if (isConstEnum &&
-                (!node.argumentExpression || node.argumentExpression.kind !== 9 /* StringLiteral */)) {
-                error(node.argumentExpression, ts.Diagnostics.A_const_enum_member_can_only_be_accessed_using_a_string_literal);
-                return unknownType;
+            // run the check only for the first declaration in the list
+            if (ts.getDeclarationOfKind(symbol, node.kind) !== node) {
+                return;
             }
-            // TypeScript 1.0 spec (April 2014): 4.10 Property Access
-            // - If IndexExpr is a string literal or a numeric literal and ObjExpr's apparent type has a property with the name
-            //    given by that literal(converted to its string representation in the case of a numeric literal), the property access is of the type of that property.
-            // - Otherwise, if ObjExpr's apparent type has a numeric index signature and IndexExpr is of type Any, the Number primitive type, or an enum type,
-            //    the property access is of the type of that index signature.
-            // - Otherwise, if ObjExpr's apparent type has a string index signature and IndexExpr is of type Any, the String or Number primitive type, or an enum type,
-            //    the property access is of the type of that index signature.
-            // - Otherwise, if IndexExpr is of type Any, the String or Number primitive type, or an enum type, the property access is of type Any.
-            // See if we can index as a property.
-            if (node.argumentExpression) {
-                var name_16 = getPropertyNameForIndexedAccess(node.argumentExpression, indexType);
-                if (name_16 !== undefined) {
-                    var prop = getPropertyOfType(objectType, name_16);
-                    if (prop) {
-                        getNodeLinks(node).resolvedSymbol = prop;
-                        return getTypeOfSymbol(prop);
-                    }
-                    else if (isConstEnum) {
-                        error(node.argumentExpression, ts.Diagnostics.Property_0_does_not_exist_on_const_enum_1, name_16, symbolToString(objectType.symbol));
-                        return unknownType;
+            // we use SymbolFlags.ExportValue, SymbolFlags.ExportType and SymbolFlags.ExportNamespace
+            // to denote disjoint declarationSpaces (without making new enum type).
+            var exportedDeclarationSpaces = 0 /* None */;
+            var nonExportedDeclarationSpaces = 0 /* None */;
+            var defaultExportedDeclarationSpaces = 0 /* None */;
+            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                var d = _a[_i];
+                var declarationSpaces = getDeclarationSpaces(d);
+                var effectiveDeclarationFlags = getEffectiveDeclarationFlags(d, 1 /* Export */ | 512 /* Default */);
+                if (effectiveDeclarationFlags & 1 /* Export */) {
+                    if (effectiveDeclarationFlags & 512 /* Default */) {
+                        defaultExportedDeclarationSpaces |= declarationSpaces;
                     }
+                    else {
+                        exportedDeclarationSpaces |= declarationSpaces;
+                    }
+                }
+                else {
+                    nonExportedDeclarationSpaces |= declarationSpaces;
                 }
             }
-            // Check for compatible indexer types.
-            var allowedNullableFlags = strictNullChecks ? 0 : 6144 /* Nullable */;
-            if (isTypeAnyOrAllConstituentTypesHaveKind(indexType, 34 /* StringLike */ | 340 /* NumberLike */ | 512 /* ESSymbol */ | allowedNullableFlags)) {
-                // Try to use a number indexer.
-                if (isTypeAnyOrAllConstituentTypesHaveKind(indexType, 340 /* NumberLike */ | allowedNullableFlags) || isForInVariableForNumericPropertyNames(node.argumentExpression)) {
-                    var numberIndexInfo = getIndexInfoOfType(objectType, 1 /* Number */);
-                    if (numberIndexInfo) {
-                        getNodeLinks(node).resolvedIndexInfo = numberIndexInfo;
-                        return numberIndexInfo.type;
+            // Spaces for anything not declared a 'default export'.
+            var nonDefaultExportedDeclarationSpaces = exportedDeclarationSpaces | nonExportedDeclarationSpaces;
+            var commonDeclarationSpacesForExportsAndLocals = exportedDeclarationSpaces & nonExportedDeclarationSpaces;
+            var commonDeclarationSpacesForDefaultAndNonDefault = defaultExportedDeclarationSpaces & nonDefaultExportedDeclarationSpaces;
+            if (commonDeclarationSpacesForExportsAndLocals || commonDeclarationSpacesForDefaultAndNonDefault) {
+                // declaration spaces for exported and non-exported declarations intersect
+                for (var _b = 0, _c = symbol.declarations; _b < _c.length; _b++) {
+                    var d = _c[_b];
+                    var declarationSpaces = getDeclarationSpaces(d);
+                    var name_26 = ts.getNameOfDeclaration(d);
+                    // Only error on the declarations that contributed to the intersecting spaces.
+                    if (declarationSpaces & commonDeclarationSpacesForDefaultAndNonDefault) {
+                        error(name_26, ts.Diagnostics.Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead, ts.declarationNameToString(name_26));
+                    }
+                    else if (declarationSpaces & commonDeclarationSpacesForExportsAndLocals) {
+                        error(name_26, ts.Diagnostics.Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local, ts.declarationNameToString(name_26));
                     }
                 }
-                // Try to use string indexing.
-                var stringIndexInfo = getIndexInfoOfType(objectType, 0 /* String */);
-                if (stringIndexInfo) {
-                    getNodeLinks(node).resolvedIndexInfo = stringIndexInfo;
-                    return stringIndexInfo.type;
-                }
-                // Fall back to any.
-                if (compilerOptions.noImplicitAny && !compilerOptions.suppressImplicitAnyIndexErrors && !isTypeAny(objectType)) {
-                    error(node, getIndexTypeOfType(objectType, 1 /* Number */) ?
-                        ts.Diagnostics.Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number :
-                        ts.Diagnostics.Index_signature_of_object_type_implicitly_has_an_any_type);
+            }
+            function getDeclarationSpaces(d) {
+                switch (d.kind) {
+                    case 230 /* InterfaceDeclaration */:
+                        return 2097152 /* ExportType */;
+                    case 233 /* ModuleDeclaration */:
+                        return ts.isAmbientModule(d) || ts.getModuleInstanceState(d) !== 0 /* NonInstantiated */
+                            ? 4194304 /* ExportNamespace */ | 1048576 /* ExportValue */
+                            : 4194304 /* ExportNamespace */;
+                    case 229 /* ClassDeclaration */:
+                    case 232 /* EnumDeclaration */:
+                        return 2097152 /* ExportType */ | 1048576 /* ExportValue */;
+                    case 237 /* ImportEqualsDeclaration */:
+                        var result_3 = 0;
+                        var target = resolveAlias(getSymbolOfNode(d));
+                        ts.forEach(target.declarations, function (d) { result_3 |= getDeclarationSpaces(d); });
+                        return result_3;
+                    default:
+                        return 1048576 /* ExportValue */;
                 }
-                return anyType;
             }
-            // REVIEW: Users should know the type that was actually used.
-            error(node, ts.Diagnostics.An_index_expression_argument_must_be_of_type_string_number_symbol_or_any);
-            return unknownType;
+        }
+        function getAwaitedTypeOfPromise(type, errorNode, diagnosticMessage) {
+            var promisedType = getPromisedTypeOfPromise(type, errorNode);
+            return promisedType && getAwaitedType(promisedType, errorNode, diagnosticMessage);
         }
         /**
-         * If indexArgumentExpression is a string literal or number literal, returns its text.
-         * If indexArgumentExpression is a constant value, returns its string value.
-         * If indexArgumentExpression is a well known symbol, returns the property name corresponding
-         *    to this symbol, as long as it is a proper symbol reference.
-         * Otherwise, returns undefined.
+         * Gets the "promised type" of a promise.
+         * @param type The type of the promise.
+         * @remarks The "promised type" of a type is the type of the "value" parameter of the "onfulfilled" callback.
          */
-        function getPropertyNameForIndexedAccess(indexArgumentExpression, indexArgumentType) {
-            if (indexArgumentExpression.kind === 9 /* StringLiteral */ || indexArgumentExpression.kind === 8 /* NumericLiteral */) {
-                return indexArgumentExpression.text;
-            }
-            if (indexArgumentExpression.kind === 173 /* ElementAccessExpression */ || indexArgumentExpression.kind === 172 /* PropertyAccessExpression */) {
-                var value = getConstantValue(indexArgumentExpression);
-                if (value !== undefined) {
-                    return value.toString();
-                }
+        function getPromisedTypeOfPromise(promise, errorNode) {
+            //
+            //  { // promise
+            //      then( // thenFunction
+            //          onfulfilled: ( // onfulfilledParameterType
+            //              value: T // valueParameterType
+            //          ) => any
+            //      ): any;
+            //  }
+            //
+            if (isTypeAny(promise)) {
+                return undefined;
             }
-            if (checkThatExpressionIsProperSymbolReference(indexArgumentExpression, indexArgumentType, /*reportError*/ false)) {
-                var rightHandSideName = indexArgumentExpression.name.text;
-                return ts.getPropertyNameForKnownSymbolName(rightHandSideName);
+            var typeAsPromise = promise;
+            if (typeAsPromise.promisedTypeOfPromise) {
+                return typeAsPromise.promisedTypeOfPromise;
             }
-            return undefined;
-        }
-        /**
-         * A proper symbol reference requires the following:
-         *   1. The property access denotes a property that exists
-         *   2. The expression is of the form Symbol.<identifier>
-         *   3. The property access is of the primitive type symbol.
-         *   4. Symbol in this context resolves to the global Symbol object
-         */
-        function checkThatExpressionIsProperSymbolReference(expression, expressionType, reportError) {
-            if (expressionType === unknownType) {
-                // There is already an error, so no need to report one.
-                return false;
+            if (isReferenceToType(promise, getGlobalPromiseType(/*reportErrors*/ false))) {
+                return typeAsPromise.promisedTypeOfPromise = promise.typeArguments[0];
             }
-            if (!ts.isWellKnownSymbolSyntactically(expression)) {
-                return false;
+            var thenFunction = getTypeOfPropertyOfType(promise, "then");
+            if (isTypeAny(thenFunction)) {
+                return undefined;
             }
-            // Make sure the property type is the primitive symbol type
-            if ((expressionType.flags & 512 /* ESSymbol */) === 0) {
-                if (reportError) {
-                    error(expression, ts.Diagnostics.A_computed_property_name_of_the_form_0_must_be_of_type_symbol, ts.getTextOfNode(expression));
+            var thenSignatures = thenFunction ? getSignaturesOfType(thenFunction, 0 /* Call */) : emptyArray;
+            if (thenSignatures.length === 0) {
+                if (errorNode) {
+                    error(errorNode, ts.Diagnostics.A_promise_must_have_a_then_method);
                 }
-                return false;
-            }
-            // The name is Symbol.<someName>, so make sure Symbol actually resolves to the
-            // global Symbol object
-            var leftHandSide = expression.expression;
-            var leftHandSideSymbol = getResolvedSymbol(leftHandSide);
-            if (!leftHandSideSymbol) {
-                return false;
+                return undefined;
             }
-            var globalESSymbol = getGlobalESSymbolConstructorSymbol();
-            if (!globalESSymbol) {
-                // Already errored when we tried to look up the symbol
-                return false;
+            var onfulfilledParameterType = getTypeWithFacts(getUnionType(ts.map(thenSignatures, getTypeOfFirstParameterOfSignature)), 524288 /* NEUndefinedOrNull */);
+            if (isTypeAny(onfulfilledParameterType)) {
+                return undefined;
             }
-            if (leftHandSideSymbol !== globalESSymbol) {
-                if (reportError) {
-                    error(leftHandSide, ts.Diagnostics.Symbol_reference_does_not_refer_to_the_global_Symbol_constructor_object);
+            var onfulfilledParameterSignatures = getSignaturesOfType(onfulfilledParameterType, 0 /* Call */);
+            if (onfulfilledParameterSignatures.length === 0) {
+                if (errorNode) {
+                    error(errorNode, ts.Diagnostics.The_first_parameter_of_the_then_method_of_a_promise_must_be_a_callback);
                 }
-                return false;
+                return undefined;
             }
-            return true;
+            return typeAsPromise.promisedTypeOfPromise = getUnionType(ts.map(onfulfilledParameterSignatures, getTypeOfFirstParameterOfSignature), /*subtypeReduction*/ true);
         }
-        function resolveUntypedCall(node) {
-            if (node.kind === 176 /* TaggedTemplateExpression */) {
-                checkExpression(node.template);
+        /**
+         * Gets the "awaited type" of a type.
+         * @param type The type to await.
+         * @remarks The "awaited type" of an expression is its "promised type" if the expression is a
+         * Promise-like type; otherwise, it is the type of the expression. This is used to reflect
+         * The runtime behavior of the `await` keyword.
+         */
+        function checkAwaitedType(type, errorNode, diagnosticMessage) {
+            return getAwaitedType(type, errorNode, diagnosticMessage) || unknownType;
+        }
+        function getAwaitedType(type, errorNode, diagnosticMessage) {
+            var typeAsAwaitable = type;
+            if (typeAsAwaitable.awaitedTypeOfType) {
+                return typeAsAwaitable.awaitedTypeOfType;
             }
-            else if (node.kind !== 143 /* Decorator */) {
-                ts.forEach(node.arguments, function (argument) {
-                    checkExpression(argument);
-                });
+            if (isTypeAny(type)) {
+                return typeAsAwaitable.awaitedTypeOfType = type;
             }
-            return anySignature;
-        }
-        function resolveErrorCall(node) {
-            resolveUntypedCall(node);
-            return unknownSignature;
-        }
-        // Re-order candidate signatures into the result array. Assumes the result array to be empty.
-        // The candidate list orders groups in reverse, but within a group signatures are kept in declaration order
-        // A nit here is that we reorder only signatures that belong to the same symbol,
-        // so order how inherited signatures are processed is still preserved.
-        // interface A { (x: string): void }
-        // interface B extends A { (x: 'foo'): string }
-        // const b: B;
-        // b('foo') // <- here overloads should be processed as [(x:'foo'): string, (x: string): void]
-        function reorderCandidates(signatures, result) {
-            var lastParent;
-            var lastSymbol;
-            var cutoffIndex = 0;
-            var index;
-            var specializedIndex = -1;
-            var spliceIndex;
-            ts.Debug.assert(!result.length);
-            for (var _i = 0, signatures_2 = signatures; _i < signatures_2.length; _i++) {
-                var signature = signatures_2[_i];
-                var symbol = signature.declaration && getSymbolOfNode(signature.declaration);
-                var parent_11 = signature.declaration && signature.declaration.parent;
-                if (!lastSymbol || symbol === lastSymbol) {
-                    if (lastParent && parent_11 === lastParent) {
-                        index++;
-                    }
-                    else {
-                        lastParent = parent_11;
-                        index = cutoffIndex;
-                    }
+            if (type.flags & 65536 /* Union */) {
+                var types = void 0;
+                for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                    var constituentType = _a[_i];
+                    types = ts.append(types, getAwaitedType(constituentType, errorNode, diagnosticMessage));
                 }
-                else {
-                    // current declaration belongs to a different symbol
-                    // set cutoffIndex so re-orderings in the future won't change result set from 0 to cutoffIndex
-                    index = cutoffIndex = result.length;
-                    lastParent = parent_11;
+                if (!types) {
+                    return undefined;
                 }
-                lastSymbol = symbol;
-                // specialized signatures always need to be placed before non-specialized signatures regardless
-                // of the cutoff position; see GH#1133
-                if (signature.hasLiteralTypes) {
-                    specializedIndex++;
-                    spliceIndex = specializedIndex;
-                    // The cutoff index always needs to be greater than or equal to the specialized signature index
-                    // in order to prevent non-specialized signatures from being added before a specialized
-                    // signature.
-                    cutoffIndex++;
+                return typeAsAwaitable.awaitedTypeOfType = getUnionType(types, /*subtypeReduction*/ true);
+            }
+            var promisedType = getPromisedTypeOfPromise(type);
+            if (promisedType) {
+                if (type.id === promisedType.id || ts.indexOf(awaitedTypeStack, promisedType.id) >= 0) {
+                    // Verify that we don't have a bad actor in the form of a promise whose
+                    // promised type is the same as the promise type, or a mutually recursive
+                    // promise. If so, we return undefined as we cannot guess the shape. If this
+                    // were the actual case in the JavaScript, this Promise would never resolve.
+                    //
+                    // An example of a bad actor with a singly-recursive promise type might
+                    // be:
+                    //
+                    //  interface BadPromise {
+                    //      then(
+                    //          onfulfilled: (value: BadPromise) => any,
+                    //          onrejected: (error: any) => any): BadPromise;
+                    //  }
+                    // The above interface will pass the PromiseLike check, and return a
+                    // promised type of `BadPromise`. Since this is a self reference, we
+                    // don't want to keep recursing ad infinitum.
+                    //
+                    // An example of a bad actor in the form of a mutually-recursive
+                    // promise type might be:
+                    //
+                    //  interface BadPromiseA {
+                    //      then(
+                    //          onfulfilled: (value: BadPromiseB) => any,
+                    //          onrejected: (error: any) => any): BadPromiseB;
+                    //  }
+                    //
+                    //  interface BadPromiseB {
+                    //      then(
+                    //          onfulfilled: (value: BadPromiseA) => any,
+                    //          onrejected: (error: any) => any): BadPromiseA;
+                    //  }
+                    //
+                    if (errorNode) {
+                        error(errorNode, ts.Diagnostics.Type_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method);
+                    }
+                    return undefined;
                 }
-                else {
-                    spliceIndex = index;
+                // Keep track of the type we're about to unwrap to avoid bad recursive promise types.
+                // See the comments above for more information.
+                awaitedTypeStack.push(type.id);
+                var awaitedType = getAwaitedType(promisedType, errorNode, diagnosticMessage);
+                awaitedTypeStack.pop();
+                if (!awaitedType) {
+                    return undefined;
                 }
-                result.splice(spliceIndex, 0, signature);
+                return typeAsAwaitable.awaitedTypeOfType = awaitedType;
             }
-        }
-        function getSpreadArgumentIndex(args) {
-            for (var i = 0; i < args.length; i++) {
-                var arg = args[i];
-                if (arg && arg.kind === 191 /* SpreadElementExpression */) {
-                    return i;
+            // The type was not a promise, so it could not be unwrapped any further.
+            // As long as the type does not have a callable "then" property, it is
+            // safe to return the type; otherwise, an error will be reported in
+            // the call to getNonThenableType and we will return undefined.
+            //
+            // An example of a non-promise "thenable" might be:
+            //
+            //  await { then(): void {} }
+            //
+            // The "thenable" does not match the minimal definition for a promise. When
+            // a Promise/A+-compatible or ES6 promise tries to adopt this value, the promise
+            // will never settle. We treat this as an error to help flag an early indicator
+            // of a runtime problem. If the user wants to return this value from an async
+            // function, they would need to wrap it in some other value. If they want it to
+            // be treated as a promise, they can cast to <any>.
+            var thenFunction = getTypeOfPropertyOfType(type, "then");
+            if (thenFunction && getSignaturesOfType(thenFunction, 0 /* Call */).length > 0) {
+                if (errorNode) {
+                    ts.Debug.assert(!!diagnosticMessage);
+                    error(errorNode, diagnosticMessage);
                 }
+                return undefined;
             }
-            return -1;
+            return typeAsAwaitable.awaitedTypeOfType = type;
         }
-        function hasCorrectArity(node, args, signature, signatureHelpTrailingComma) {
-            if (signatureHelpTrailingComma === void 0) { signatureHelpTrailingComma = false; }
-            var argCount; // Apparent number of arguments we will have in this call
-            var typeArguments; // Type arguments (undefined if none)
-            var callIsIncomplete; // In incomplete call we want to be lenient when we have too few arguments
-            var isDecorator;
-            var spreadArgIndex = -1;
-            if (node.kind === 176 /* TaggedTemplateExpression */) {
-                var tagExpression = node;
-                // Even if the call is incomplete, we'll have a missing expression as our last argument,
-                // so we can say the count is just the arg list length
-                argCount = args.length;
-                typeArguments = undefined;
-                if (tagExpression.template.kind === 189 /* TemplateExpression */) {
-                    // If a tagged template expression lacks a tail literal, the call is incomplete.
-                    // Specifically, a template only can end in a TemplateTail or a Missing literal.
-                    var templateExpression = tagExpression.template;
-                    var lastSpan = ts.lastOrUndefined(templateExpression.templateSpans);
-                    ts.Debug.assert(lastSpan !== undefined); // we should always have at least one span.
-                    callIsIncomplete = ts.nodeIsMissing(lastSpan.literal) || !!lastSpan.literal.isUnterminated;
+        /**
+         * Checks the return type of an async function to ensure it is a compatible
+         * Promise implementation.
+         *
+         * This checks that an async function has a valid Promise-compatible return type,
+         * and returns the *awaited type* of the promise. An async function has a valid
+         * Promise-compatible return type if the resolved value of the return type has a
+         * construct signature that takes in an `initializer` function that in turn supplies
+         * a `resolve` function as one of its arguments and results in an object with a
+         * callable `then` signature.
+         *
+         * @param node The signature to check
+         */
+        function checkAsyncFunctionReturnType(node) {
+            // As part of our emit for an async function, we will need to emit the entity name of
+            // the return type annotation as an expression. To meet the necessary runtime semantics
+            // for __awaiter, we must also check that the type of the declaration (e.g. the static
+            // side or "constructor" of the promise type) is compatible `PromiseConstructorLike`.
+            //
+            // An example might be (from lib.es6.d.ts):
+            //
+            //  interface Promise<T> { ... }
+            //  interface PromiseConstructor {
+            //      new <T>(...): Promise<T>;
+            //  }
+            //  declare var Promise: PromiseConstructor;
+            //
+            // When an async function declares a return type annotation of `Promise<T>`, we
+            // need to get the type of the `Promise` variable declaration above, which would
+            // be `PromiseConstructor`.
+            //
+            // The same case applies to a class:
+            //
+            //  declare class Promise<T> {
+            //      constructor(...);
+            //      then<U>(...): Promise<U>;
+            //  }
+            //
+            var returnTypeNode = ts.getEffectiveReturnTypeNode(node);
+            var returnType = getTypeFromTypeNode(returnTypeNode);
+            if (languageVersion >= 2 /* ES2015 */) {
+                if (returnType === unknownType) {
+                    return unknownType;
                 }
-                else {
-                    // If the template didn't end in a backtick, or its beginning occurred right prior to EOF,
-                    // then this might actually turn out to be a TemplateHead in the future;
-                    // so we consider the call to be incomplete.
-                    var templateLiteral = tagExpression.template;
-                    ts.Debug.assert(templateLiteral.kind === 11 /* NoSubstitutionTemplateLiteral */);
-                    callIsIncomplete = !!templateLiteral.isUnterminated;
+                var globalPromiseType = getGlobalPromiseType(/*reportErrors*/ true);
+                if (globalPromiseType !== emptyGenericType && !isReferenceToType(returnType, globalPromiseType)) {
+                    // The promise type was not a valid type reference to the global promise type, so we
+                    // report an error and return the unknown type.
+                    error(returnTypeNode, ts.Diagnostics.The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type);
+                    return unknownType;
                 }
             }
-            else if (node.kind === 143 /* Decorator */) {
-                isDecorator = true;
-                typeArguments = undefined;
-                argCount = getEffectiveArgumentCount(node, /*args*/ undefined, signature);
-            }
             else {
-                var callExpression = node;
-                if (!callExpression.arguments) {
-                    // This only happens when we have something of the form: 'new C'
-                    ts.Debug.assert(callExpression.kind === 175 /* NewExpression */);
-                    return signature.minArgumentCount === 0;
+                // Always mark the type node as referenced if it points to a value
+                markTypeNodeAsReferenced(returnTypeNode);
+                if (returnType === unknownType) {
+                    return unknownType;
+                }
+                var promiseConstructorName = ts.getEntityNameFromTypeNode(returnTypeNode);
+                if (promiseConstructorName === undefined) {
+                    error(returnTypeNode, ts.Diagnostics.Type_0_is_not_a_valid_async_function_return_type_in_ES5_SlashES3_because_it_does_not_refer_to_a_Promise_compatible_constructor_value, typeToString(returnType));
+                    return unknownType;
+                }
+                var promiseConstructorSymbol = resolveEntityName(promiseConstructorName, 107455 /* Value */, /*ignoreErrors*/ true);
+                var promiseConstructorType = promiseConstructorSymbol ? getTypeOfSymbol(promiseConstructorSymbol) : unknownType;
+                if (promiseConstructorType === unknownType) {
+                    if (promiseConstructorName.kind === 71 /* Identifier */ && promiseConstructorName.text === "Promise" && getTargetType(returnType) === getGlobalPromiseType(/*reportErrors*/ false)) {
+                        error(returnTypeNode, ts.Diagnostics.An_async_function_or_method_in_ES5_SlashES3_requires_the_Promise_constructor_Make_sure_you_have_a_declaration_for_the_Promise_constructor_or_include_ES2015_in_your_lib_option);
+                    }
+                    else {
+                        error(returnTypeNode, ts.Diagnostics.Type_0_is_not_a_valid_async_function_return_type_in_ES5_SlashES3_because_it_does_not_refer_to_a_Promise_compatible_constructor_value, ts.entityNameToString(promiseConstructorName));
+                    }
+                    return unknownType;
+                }
+                var globalPromiseConstructorLikeType = getGlobalPromiseConstructorLikeType(/*reportErrors*/ true);
+                if (globalPromiseConstructorLikeType === emptyObjectType) {
+                    // If we couldn't resolve the global PromiseConstructorLike type we cannot verify
+                    // compatibility with __awaiter.
+                    error(returnTypeNode, ts.Diagnostics.Type_0_is_not_a_valid_async_function_return_type_in_ES5_SlashES3_because_it_does_not_refer_to_a_Promise_compatible_constructor_value, ts.entityNameToString(promiseConstructorName));
+                    return unknownType;
+                }
+                if (!checkTypeAssignableTo(promiseConstructorType, globalPromiseConstructorLikeType, returnTypeNode, ts.Diagnostics.Type_0_is_not_a_valid_async_function_return_type_in_ES5_SlashES3_because_it_does_not_refer_to_a_Promise_compatible_constructor_value)) {
+                    return unknownType;
+                }
+                // Verify there is no local declaration that could collide with the promise constructor.
+                var rootName = promiseConstructorName && getFirstIdentifier(promiseConstructorName);
+                var collidingSymbol = getSymbol(node.locals, rootName.text, 107455 /* Value */);
+                if (collidingSymbol) {
+                    error(collidingSymbol.valueDeclaration, ts.Diagnostics.Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions, rootName.text, ts.entityNameToString(promiseConstructorName));
+                    return unknownType;
                 }
-                argCount = signatureHelpTrailingComma ? args.length + 1 : args.length;
-                // If we are missing the close paren, the call is incomplete.
-                callIsIncomplete = callExpression.arguments.end === callExpression.end;
-                typeArguments = callExpression.typeArguments;
-                spreadArgIndex = getSpreadArgumentIndex(args);
             }
-            // If the user supplied type arguments, but the number of type arguments does not match
-            // the declared number of type parameters, the call has an incorrect arity.
-            var hasRightNumberOfTypeArgs = !typeArguments ||
-                (signature.typeParameters && typeArguments.length === signature.typeParameters.length);
-            if (!hasRightNumberOfTypeArgs) {
-                return false;
+            // Get and return the awaited type of the return type.
+            return checkAwaitedType(returnType, node, ts.Diagnostics.The_return_type_of_an_async_function_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member);
+        }
+        /** Check a decorator */
+        function checkDecorator(node) {
+            var signature = getResolvedSignature(node);
+            var returnType = getReturnTypeOfSignature(signature);
+            if (returnType.flags & 1 /* Any */) {
+                return;
             }
-            // If spread arguments are present, check that they correspond to a rest parameter. If so, no
-            // further checking is necessary.
-            if (spreadArgIndex >= 0) {
-                return isRestParameterIndex(signature, spreadArgIndex);
+            var expectedReturnType;
+            var headMessage = getDiagnosticHeadMessageForDecoratorResolution(node);
+            var errorInfo;
+            switch (node.parent.kind) {
+                case 229 /* ClassDeclaration */:
+                    var classSymbol = getSymbolOfNode(node.parent);
+                    var classConstructorType = getTypeOfSymbol(classSymbol);
+                    expectedReturnType = getUnionType([classConstructorType, voidType]);
+                    break;
+                case 146 /* Parameter */:
+                    expectedReturnType = voidType;
+                    errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any);
+                    break;
+                case 149 /* PropertyDeclaration */:
+                    expectedReturnType = voidType;
+                    errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.The_return_type_of_a_property_decorator_function_must_be_either_void_or_any);
+                    break;
+                case 151 /* MethodDeclaration */:
+                case 153 /* GetAccessor */:
+                case 154 /* SetAccessor */:
+                    var methodType = getTypeOfNode(node.parent);
+                    var descriptorType = createTypedPropertyDescriptorType(methodType);
+                    expectedReturnType = getUnionType([descriptorType, voidType]);
+                    break;
             }
-            // Too many arguments implies incorrect arity.
-            if (!signature.hasRestParameter && argCount > signature.parameters.length) {
-                return false;
+            checkTypeAssignableTo(returnType, expectedReturnType, node, headMessage, errorInfo);
+        }
+        /**
+         * If a TypeNode can be resolved to a value symbol imported from an external module, it is
+         * marked as referenced to prevent import elision.
+         */
+        function markTypeNodeAsReferenced(node) {
+            markEntityNameOrEntityExpressionAsReference(node && ts.getEntityNameFromTypeNode(node));
+        }
+        function markEntityNameOrEntityExpressionAsReference(typeName) {
+            var rootName = typeName && getFirstIdentifier(typeName);
+            var rootSymbol = rootName && resolveName(rootName, rootName.text, (typeName.kind === 71 /* Identifier */ ? 793064 /* Type */ : 1920 /* Namespace */) | 8388608 /* Alias */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined);
+            if (rootSymbol
+                && rootSymbol.flags & 8388608 /* Alias */
+                && symbolIsValue(rootSymbol)
+                && !isConstEnumOrConstEnumOnlyModule(resolveAlias(rootSymbol))) {
+                markAliasSymbolAsReferenced(rootSymbol);
             }
-            // If the call is incomplete, we should skip the lower bound check.
-            var hasEnoughArguments = argCount >= signature.minArgumentCount;
-            return callIsIncomplete || hasEnoughArguments;
         }
-        // If type has a single call signature and no other members, return that signature. Otherwise, return undefined.
-        function getSingleCallSignature(type) {
-            if (type.flags & 2588672 /* ObjectType */) {
-                var resolved = resolveStructuredTypeMembers(type);
-                if (resolved.callSignatures.length === 1 && resolved.constructSignatures.length === 0 &&
-                    resolved.properties.length === 0 && !resolved.stringIndexInfo && !resolved.numberIndexInfo) {
-                    return resolved.callSignatures[0];
+        /**
+         * This function marks the type used for metadata decorator as referenced if it is import
+         * from external module.
+         * This is different from markTypeNodeAsReferenced because it tries to simplify type nodes in
+         * union and intersection type
+         * @param node
+         */
+        function markDecoratorMedataDataTypeNodeAsReferenced(node) {
+            var entityName = getEntityNameForDecoratorMetadata(node);
+            if (entityName && ts.isEntityName(entityName)) {
+                markEntityNameOrEntityExpressionAsReference(entityName);
+            }
+        }
+        function getEntityNameForDecoratorMetadata(node) {
+            if (node) {
+                switch (node.kind) {
+                    case 167 /* IntersectionType */:
+                    case 166 /* UnionType */:
+                        var commonEntityName = void 0;
+                        for (var _i = 0, _a = node.types; _i < _a.length; _i++) {
+                            var typeNode = _a[_i];
+                            var individualEntityName = getEntityNameForDecoratorMetadata(typeNode);
+                            if (!individualEntityName) {
+                                // Individual is something like string number
+                                // So it would be serialized to either that type or object
+                                // Safe to return here
+                                return undefined;
+                            }
+                            if (commonEntityName) {
+                                // Note this is in sync with the transformation that happens for type node.
+                                // Keep this in sync with serializeUnionOrIntersectionType
+                                // Verify if they refer to same entity and is identifier
+                                // return undefined if they dont match because we would emit object
+                                if (!ts.isIdentifier(commonEntityName) ||
+                                    !ts.isIdentifier(individualEntityName) ||
+                                    commonEntityName.text !== individualEntityName.text) {
+                                    return undefined;
+                                }
+                            }
+                            else {
+                                commonEntityName = individualEntityName;
+                            }
+                        }
+                        return commonEntityName;
+                    case 168 /* ParenthesizedType */:
+                        return getEntityNameForDecoratorMetadata(node.type);
+                    case 159 /* TypeReference */:
+                        return node.typeName;
                 }
             }
-            return undefined;
         }
-        // Instantiate a generic signature in the context of a non-generic signature (section 3.8.5 in TypeScript spec)
-        function instantiateSignatureInContextOf(signature, contextualSignature, contextualMapper) {
-            var context = createInferenceContext(signature, /*inferUnionTypes*/ true);
-            forEachMatchingParameterType(contextualSignature, signature, function (source, target) {
-                // Type parameters from outer context referenced by source type are fixed by instantiation of the source type
-                inferTypes(context, instantiateType(source, contextualMapper), target);
-            });
-            return getSignatureInstantiation(signature, getInferredTypes(context));
+        function getParameterTypeNodeForDecoratorCheck(node) {
+            var typeNode = ts.getEffectiveTypeAnnotationNode(node);
+            return ts.isRestParameter(node) ? ts.getRestParameterElementType(typeNode) : typeNode;
         }
-        function inferTypeArguments(node, signature, args, excludeArgument, context) {
-            var typeParameters = signature.typeParameters;
-            var inferenceMapper = getInferenceMapper(context);
-            // Clear out all the inference results from the last time inferTypeArguments was called on this context
-            for (var i = 0; i < typeParameters.length; i++) {
-                // As an optimization, we don't have to clear (and later recompute) inferred types
-                // for type parameters that have already been fixed on the previous call to inferTypeArguments.
-                // It would be just as correct to reset all of them. But then we'd be repeating the same work
-                // for the type parameters that were fixed, namely the work done by getInferredType.
-                if (!context.inferences[i].isFixed) {
-                    context.inferredTypes[i] = undefined;
-                }
+        /** Check the decorators of a node */
+        function checkDecorators(node) {
+            if (!node.decorators) {
+                return;
             }
-            // On this call to inferTypeArguments, we may get more inferences for certain type parameters that were not
-            // fixed last time. This means that a type parameter that failed inference last time may succeed this time,
-            // or vice versa. Therefore, the failedTypeParameterIndex is useless if it points to an unfixed type parameter,
-            // because it may change. So here we reset it. However, getInferredType will not revisit any type parameters
-            // that were previously fixed. So if a fixed type parameter failed previously, it will fail again because
-            // it will contain the exact same set of inferences. So if we reset the index from a fixed type parameter,
-            // we will lose information that we won't recover this time around.
-            if (context.failedTypeParameterIndex !== undefined && !context.inferences[context.failedTypeParameterIndex].isFixed) {
-                context.failedTypeParameterIndex = undefined;
+            // skip this check for nodes that cannot have decorators. These should have already had an error reported by
+            // checkGrammarDecorators.
+            if (!ts.nodeCanBeDecorated(node)) {
+                return;
             }
-            var thisType = getThisTypeOfSignature(signature);
-            if (thisType) {
-                var thisArgumentNode = getThisArgumentOfCall(node);
-                var thisArgumentType = thisArgumentNode ? checkExpression(thisArgumentNode) : voidType;
-                inferTypes(context, thisArgumentType, thisType);
+            if (!compilerOptions.experimentalDecorators) {
+                error(node, ts.Diagnostics.Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning);
             }
-            // We perform two passes over the arguments. In the first pass we infer from all arguments, but use
-            // wildcards for all context sensitive function expressions.
-            var argCount = getEffectiveArgumentCount(node, args, signature);
-            for (var i = 0; i < argCount; i++) {
-                var arg = getEffectiveArgument(node, args, i);
-                // If the effective argument is 'undefined', then it is an argument that is present but is synthetic.
-                if (arg === undefined || arg.kind !== 193 /* OmittedExpression */) {
-                    var paramType = getTypeAtPosition(signature, i);
-                    var argType = getEffectiveArgumentType(node, i, arg);
-                    // If the effective argument type is 'undefined', there is no synthetic type
-                    // for the argument. In that case, we should check the argument.
-                    if (argType === undefined) {
-                        // For context sensitive arguments we pass the identityMapper, which is a signal to treat all
-                        // context sensitive function expressions as wildcards
-                        var mapper = excludeArgument && excludeArgument[i] !== undefined ? identityMapper : inferenceMapper;
-                        argType = checkExpressionWithContextualType(arg, paramType, mapper);
-                    }
-                    inferTypes(context, argType, paramType);
-                }
+            var firstDecorator = node.decorators[0];
+            checkExternalEmitHelpers(firstDecorator, 8 /* Decorate */);
+            if (node.kind === 146 /* Parameter */) {
+                checkExternalEmitHelpers(firstDecorator, 32 /* Param */);
             }
-            // In the second pass we visit only context sensitive arguments, and only those that aren't excluded, this
-            // time treating function expressions normally (which may cause previously inferred type arguments to be fixed
-            // as we construct types for contextually typed parameters)
-            // Decorators will not have `excludeArgument`, as their arguments cannot be contextually typed.
-            // Tagged template expressions will always have `undefined` for `excludeArgument[0]`.
-            if (excludeArgument) {
-                for (var i = 0; i < argCount; i++) {
-                    // No need to check for omitted args and template expressions, their exclusion value is always undefined
-                    if (excludeArgument[i] === false) {
-                        var arg = args[i];
-                        var paramType = getTypeAtPosition(signature, i);
-                        inferTypes(context, checkExpressionWithContextualType(arg, paramType, inferenceMapper), paramType);
-                    }
+            if (compilerOptions.emitDecoratorMetadata) {
+                checkExternalEmitHelpers(firstDecorator, 16 /* Metadata */);
+                // we only need to perform these checks if we are emitting serialized type metadata for the target of a decorator.
+                switch (node.kind) {
+                    case 229 /* ClassDeclaration */:
+                        var constructor = ts.getFirstConstructorWithBody(node);
+                        if (constructor) {
+                            for (var _i = 0, _a = constructor.parameters; _i < _a.length; _i++) {
+                                var parameter = _a[_i];
+                                markDecoratorMedataDataTypeNodeAsReferenced(getParameterTypeNodeForDecoratorCheck(parameter));
+                            }
+                        }
+                        break;
+                    case 151 /* MethodDeclaration */:
+                    case 153 /* GetAccessor */:
+                    case 154 /* SetAccessor */:
+                        for (var _b = 0, _c = node.parameters; _b < _c.length; _b++) {
+                            var parameter = _c[_b];
+                            markDecoratorMedataDataTypeNodeAsReferenced(getParameterTypeNodeForDecoratorCheck(parameter));
+                        }
+                        markDecoratorMedataDataTypeNodeAsReferenced(ts.getEffectiveReturnTypeNode(node));
+                        break;
+                    case 149 /* PropertyDeclaration */:
+                        markDecoratorMedataDataTypeNodeAsReferenced(ts.getEffectiveTypeAnnotationNode(node));
+                        break;
+                    case 146 /* Parameter */:
+                        markDecoratorMedataDataTypeNodeAsReferenced(getParameterTypeNodeForDecoratorCheck(node));
+                        break;
                 }
             }
-            getInferredTypes(context);
+            ts.forEach(node.decorators, checkDecorator);
         }
-        function checkTypeArguments(signature, typeArgumentNodes, typeArgumentTypes, reportErrors, headMessage) {
-            var typeParameters = signature.typeParameters;
-            var typeArgumentsAreAssignable = true;
-            var mapper;
-            for (var i = 0; i < typeParameters.length; i++) {
-                if (typeArgumentsAreAssignable /* so far */) {
-                    var constraint = getConstraintOfTypeParameter(typeParameters[i]);
-                    if (constraint) {
-                        var errorInfo = void 0;
-                        var typeArgumentHeadMessage = ts.Diagnostics.Type_0_does_not_satisfy_the_constraint_1;
-                        if (reportErrors && headMessage) {
-                            errorInfo = ts.chainDiagnosticMessages(errorInfo, typeArgumentHeadMessage);
-                            typeArgumentHeadMessage = headMessage;
-                        }
-                        if (!mapper) {
-                            mapper = createTypeMapper(typeParameters, typeArgumentTypes);
-                        }
-                        var typeArgument = typeArgumentTypes[i];
-                        typeArgumentsAreAssignable = checkTypeAssignableTo(typeArgument, getTypeWithThisArgument(instantiateType(constraint, mapper), typeArgument), reportErrors ? typeArgumentNodes[i] : undefined, typeArgumentHeadMessage, errorInfo);
-                    }
-                }
+        function checkFunctionDeclaration(node) {
+            if (produceDiagnostics) {
+                checkFunctionOrMethodDeclaration(node);
+                checkGrammarForGenerator(node);
+                checkCollisionWithCapturedSuperVariable(node, node.name);
+                checkCollisionWithCapturedThisVariable(node, node.name);
+                checkCollisionWithCapturedNewTargetVariable(node, node.name);
+                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
+                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
             }
-            return typeArgumentsAreAssignable;
         }
-        function checkApplicableSignature(node, args, signature, relation, excludeArgument, reportErrors) {
-            var thisType = getThisTypeOfSignature(signature);
-            if (thisType && thisType !== voidType && node.kind !== 175 /* NewExpression */) {
-                // If the called expression is not of the form `x.f` or `x["f"]`, then sourceType = voidType
-                // If the signature's 'this' type is voidType, then the check is skipped -- anything is compatible.
-                // If the expression is a new expression, then the check is skipped.
-                var thisArgumentNode = getThisArgumentOfCall(node);
-                var thisArgumentType = thisArgumentNode ? checkExpression(thisArgumentNode) : voidType;
-                var errorNode = reportErrors ? (thisArgumentNode || node) : undefined;
-                var headMessage_1 = ts.Diagnostics.The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1;
-                if (!checkTypeRelatedTo(thisArgumentType, getThisTypeOfSignature(signature), relation, errorNode, headMessage_1)) {
-                    return false;
-                }
+        function checkFunctionOrMethodDeclaration(node) {
+            checkDecorators(node);
+            checkSignatureDeclaration(node);
+            var functionFlags = ts.getFunctionFlags(node);
+            // Do not use hasDynamicName here, because that returns false for well known symbols.
+            // We want to perform checkComputedPropertyName for all computed properties, including
+            // well known symbols.
+            if (node.name && node.name.kind === 144 /* ComputedPropertyName */) {
+                // This check will account for methods in class/interface declarations,
+                // as well as accessors in classes/object literals
+                checkComputedPropertyName(node.name);
             }
-            var headMessage = ts.Diagnostics.Argument_of_type_0_is_not_assignable_to_parameter_of_type_1;
-            var argCount = getEffectiveArgumentCount(node, args, signature);
-            for (var i = 0; i < argCount; i++) {
-                var arg = getEffectiveArgument(node, args, i);
-                // If the effective argument is 'undefined', then it is an argument that is present but is synthetic.
-                if (arg === undefined || arg.kind !== 193 /* OmittedExpression */) {
-                    // Check spread elements against rest type (from arity check we know spread argument corresponds to a rest parameter)
-                    var paramType = getTypeAtPosition(signature, i);
-                    var argType = getEffectiveArgumentType(node, i, arg);
-                    // If the effective argument type is 'undefined', there is no synthetic type
-                    // for the argument. In that case, we should check the argument.
-                    if (argType === undefined) {
-                        argType = checkExpressionWithContextualType(arg, paramType, excludeArgument && excludeArgument[i] ? identityMapper : undefined);
-                    }
-                    // Use argument expression as error location when reporting errors
-                    var errorNode = reportErrors ? getEffectiveArgumentErrorNode(node, i, arg) : undefined;
-                    if (!checkTypeRelatedTo(argType, paramType, relation, errorNode, headMessage)) {
-                        return false;
+            if (!ts.hasDynamicName(node)) {
+                // first we want to check the local symbol that contain this declaration
+                // - if node.localSymbol !== undefined - this is current declaration is exported and localSymbol points to the local symbol
+                // - if node.localSymbol === undefined - this node is non-exported so we can just pick the result of getSymbolOfNode
+                var symbol = getSymbolOfNode(node);
+                var localSymbol = node.localSymbol || symbol;
+                // Since the javascript won't do semantic analysis like typescript,
+                // if the javascript file comes before the typescript file and both contain same name functions,
+                // checkFunctionOrConstructorSymbol wouldn't be called if we didnt ignore javascript function.
+                var firstDeclaration = ts.forEach(localSymbol.declarations, 
+                // Get first non javascript function declaration
+                function (declaration) { return declaration.kind === node.kind && !ts.isSourceFileJavaScript(ts.getSourceFileOfNode(declaration)) ?
+                    declaration : undefined; });
+                // Only type check the symbol once
+                if (node === firstDeclaration) {
+                    checkFunctionOrConstructorSymbol(localSymbol);
+                }
+                if (symbol.parent) {
+                    // run check once for the first declaration
+                    if (ts.getDeclarationOfKind(symbol, node.kind) === node) {
+                        // run check on export symbol to check that modifiers agree across all exported declarations
+                        checkFunctionOrConstructorSymbol(symbol);
                     }
                 }
             }
-            return true;
-        }
-        /**
-         * Returns the this argument in calls like x.f(...) and x[f](...). Undefined otherwise.
-         */
-        function getThisArgumentOfCall(node) {
-            if (node.kind === 174 /* CallExpression */) {
-                var callee = node.expression;
-                if (callee.kind === 172 /* PropertyAccessExpression */) {
-                    return callee.expression;
+            checkSourceElement(node.body);
+            var returnTypeNode = ts.getEffectiveReturnTypeNode(node);
+            if ((functionFlags & 1 /* Generator */) === 0) {
+                var returnOrPromisedType = returnTypeNode && (functionFlags & 2 /* Async */
+                    ? checkAsyncFunctionReturnType(node) // Async function
+                    : getTypeFromTypeNode(returnTypeNode)); // normal function
+                checkAllCodePathsInNonVoidFunctionReturnOrThrow(node, returnOrPromisedType);
+            }
+            if (produceDiagnostics && !returnTypeNode) {
+                // Report an implicit any error if there is no body, no explicit return type, and node is not a private method
+                // in an ambient context
+                if (noImplicitAny && ts.nodeIsMissing(node.body) && !isPrivateWithinAmbient(node)) {
+                    reportImplicitAnyError(node, anyType);
                 }
-                else if (callee.kind === 173 /* ElementAccessExpression */) {
-                    return callee.expression;
+                if (functionFlags & 1 /* Generator */ && ts.nodeIsPresent(node.body)) {
+                    // A generator with a body and no type annotation can still cause errors. It can error if the
+                    // yielded values have no common supertype, or it can give an implicit any error if it has no
+                    // yielded values. The only way to trigger these errors is to try checking its return type.
+                    getReturnTypeOfSignature(getSignatureFromDeclaration(node));
                 }
             }
+            registerForUnusedIdentifiersCheck(node);
         }
-        /**
-         * Returns the effective arguments for an expression that works like a function invocation.
-         *
-         * If 'node' is a CallExpression or a NewExpression, then its argument list is returned.
-         * If 'node' is a TaggedTemplateExpression, a new argument list is constructed from the substitution
-         *    expressions, where the first element of the list is `undefined`.
-         * If 'node' is a Decorator, the argument list will be `undefined`, and its arguments and types
-         *    will be supplied from calls to `getEffectiveArgumentCount` and `getEffectiveArgumentType`.
-         */
-        function getEffectiveCallArguments(node) {
-            var args;
-            if (node.kind === 176 /* TaggedTemplateExpression */) {
-                var template = node.template;
-                args = [undefined];
-                if (template.kind === 189 /* TemplateExpression */) {
-                    ts.forEach(template.templateSpans, function (span) {
-                        args.push(span.expression);
-                    });
-                }
-            }
-            else if (node.kind === 143 /* Decorator */) {
-                // For a decorator, we return undefined as we will determine
-                // the number and types of arguments for a decorator using
-                // `getEffectiveArgumentCount` and `getEffectiveArgumentType` below.
-                return undefined;
-            }
-            else {
-                args = node.arguments || emptyArray;
+        function registerForUnusedIdentifiersCheck(node) {
+            if (deferredUnusedIdentifierNodes) {
+                deferredUnusedIdentifierNodes.push(node);
             }
-            return args;
         }
-        /**
-          * Returns the effective argument count for a node that works like a function invocation.
-          * If 'node' is a Decorator, the number of arguments is derived from the decoration
-          *    target and the signature:
-          *    If 'node.target' is a class declaration or class expression, the effective argument
-          *       count is 1.
-          *    If 'node.target' is a parameter declaration, the effective argument count is 3.
-          *    If 'node.target' is a property declaration, the effective argument count is 2.
-          *    If 'node.target' is a method or accessor declaration, the effective argument count
-          *       is 3, although it can be 2 if the signature only accepts two arguments, allowing
-          *       us to match a property decorator.
-          * Otherwise, the argument count is the length of the 'args' array.
-          */
-        function getEffectiveArgumentCount(node, args, signature) {
-            if (node.kind === 143 /* Decorator */) {
-                switch (node.parent.kind) {
-                    case 221 /* ClassDeclaration */:
-                    case 192 /* ClassExpression */:
-                        // A class decorator will have one argument (see `ClassDecorator` in core.d.ts)
-                        return 1;
-                    case 145 /* PropertyDeclaration */:
-                        // A property declaration decorator will have two arguments (see
-                        // `PropertyDecorator` in core.d.ts)
-                        return 2;
-                    case 147 /* MethodDeclaration */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                        // A method or accessor declaration decorator will have two or three arguments (see
-                        // `PropertyDecorator` and `MethodDecorator` in core.d.ts)
-                        // If we are emitting decorators for ES3, we will only pass two arguments.
-                        if (languageVersion === 0 /* ES3 */) {
-                            return 2;
-                        }
-                        // If the method decorator signature only accepts a target and a key, we will only
-                        // type check those arguments.
-                        return signature.parameters.length >= 3 ? 3 : 2;
-                    case 142 /* Parameter */:
-                        // A parameter declaration decorator will have three arguments (see
-                        // `ParameterDecorator` in core.d.ts)
-                        return 3;
+        function checkUnusedIdentifiers() {
+            if (deferredUnusedIdentifierNodes) {
+                for (var _i = 0, deferredUnusedIdentifierNodes_1 = deferredUnusedIdentifierNodes; _i < deferredUnusedIdentifierNodes_1.length; _i++) {
+                    var node = deferredUnusedIdentifierNodes_1[_i];
+                    switch (node.kind) {
+                        case 265 /* SourceFile */:
+                        case 233 /* ModuleDeclaration */:
+                            checkUnusedModuleMembers(node);
+                            break;
+                        case 229 /* ClassDeclaration */:
+                        case 199 /* ClassExpression */:
+                            checkUnusedClassMembers(node);
+                            checkUnusedTypeParameters(node);
+                            break;
+                        case 230 /* InterfaceDeclaration */:
+                            checkUnusedTypeParameters(node);
+                            break;
+                        case 207 /* Block */:
+                        case 235 /* CaseBlock */:
+                        case 214 /* ForStatement */:
+                        case 215 /* ForInStatement */:
+                        case 216 /* ForOfStatement */:
+                            checkUnusedLocalsAndParameters(node);
+                            break;
+                        case 152 /* Constructor */:
+                        case 186 /* FunctionExpression */:
+                        case 228 /* FunctionDeclaration */:
+                        case 187 /* ArrowFunction */:
+                        case 151 /* MethodDeclaration */:
+                        case 153 /* GetAccessor */:
+                        case 154 /* SetAccessor */:
+                            if (node.body) {
+                                checkUnusedLocalsAndParameters(node);
+                            }
+                            checkUnusedTypeParameters(node);
+                            break;
+                        case 150 /* MethodSignature */:
+                        case 155 /* CallSignature */:
+                        case 156 /* ConstructSignature */:
+                        case 157 /* IndexSignature */:
+                        case 160 /* FunctionType */:
+                        case 161 /* ConstructorType */:
+                            checkUnusedTypeParameters(node);
+                            break;
+                    }
                 }
             }
-            else {
-                return args.length;
+        }
+        function checkUnusedLocalsAndParameters(node) {
+            if (node.parent.kind !== 230 /* InterfaceDeclaration */ && noUnusedIdentifiers && !ts.isInAmbientContext(node)) {
+                node.locals.forEach(function (local) {
+                    if (!local.isReferenced) {
+                        if (local.valueDeclaration && ts.getRootDeclaration(local.valueDeclaration).kind === 146 /* Parameter */) {
+                            var parameter = ts.getRootDeclaration(local.valueDeclaration);
+                            var name_27 = ts.getNameOfDeclaration(local.valueDeclaration);
+                            if (compilerOptions.noUnusedParameters &&
+                                !ts.isParameterPropertyDeclaration(parameter) &&
+                                !ts.parameterIsThisKeyword(parameter) &&
+                                !parameterNameStartsWithUnderscore(name_27)) {
+                                error(name_27, ts.Diagnostics._0_is_declared_but_never_used, local.name);
+                            }
+                        }
+                        else if (compilerOptions.noUnusedLocals) {
+                            ts.forEach(local.declarations, function (d) { return errorUnusedLocal(ts.getNameOfDeclaration(d) || d, local.name); });
+                        }
+                    }
+                });
             }
         }
-        /**
-          * Returns the effective type of the first argument to a decorator.
-          * If 'node' is a class declaration or class expression, the effective argument type
-          *    is the type of the static side of the class.
-          * If 'node' is a parameter declaration, the effective argument type is either the type
-          *    of the static or instance side of the class for the parameter's parent method,
-          *    depending on whether the method is declared static.
-          *    For a constructor, the type is always the type of the static side of the class.
-          * If 'node' is a property, method, or accessor declaration, the effective argument
-          *    type is the type of the static or instance side of the parent class for class
-          *    element, depending on whether the element is declared static.
-          */
-        function getEffectiveDecoratorFirstArgumentType(node) {
-            // The first argument to a decorator is its `target`.
-            if (node.kind === 221 /* ClassDeclaration */) {
-                // For a class decorator, the `target` is the type of the class (e.g. the
-                // "static" or "constructor" side of the class)
-                var classSymbol = getSymbolOfNode(node);
-                return getTypeOfSymbol(classSymbol);
+        function isRemovedPropertyFromObjectSpread(node) {
+            if (ts.isBindingElement(node) && ts.isObjectBindingPattern(node.parent)) {
+                var lastElement = ts.lastOrUndefined(node.parent.elements);
+                return lastElement !== node && !!lastElement.dotDotDotToken;
             }
-            if (node.kind === 142 /* Parameter */) {
-                // For a parameter decorator, the `target` is the parent type of the
-                // parameter's containing method.
-                node = node.parent;
-                if (node.kind === 148 /* Constructor */) {
-                    var classSymbol = getSymbolOfNode(node);
-                    return getTypeOfSymbol(classSymbol);
+            return false;
+        }
+        function errorUnusedLocal(node, name) {
+            if (isIdentifierThatStartsWithUnderScore(node)) {
+                var declaration = ts.getRootDeclaration(node.parent);
+                if (declaration.kind === 226 /* VariableDeclaration */ && ts.isForInOrOfStatement(declaration.parent.parent)) {
+                    return;
                 }
             }
-            if (node.kind === 145 /* PropertyDeclaration */ ||
-                node.kind === 147 /* MethodDeclaration */ ||
-                node.kind === 149 /* GetAccessor */ ||
-                node.kind === 150 /* SetAccessor */) {
-                // For a property or method decorator, the `target` is the
-                // "static"-side type of the parent of the member if the member is
-                // declared "static"; otherwise, it is the "instance"-side type of the
-                // parent of the member.
-                return getParentTypeOfClassElement(node);
+            if (!isRemovedPropertyFromObjectSpread(node.kind === 71 /* Identifier */ ? node.parent : node)) {
+                error(node, ts.Diagnostics._0_is_declared_but_never_used, name);
             }
-            ts.Debug.fail("Unsupported decorator target.");
-            return unknownType;
         }
-        /**
-          * Returns the effective type for the second argument to a decorator.
-          * If 'node' is a parameter, its effective argument type is one of the following:
-          *    If 'node.parent' is a constructor, the effective argument type is 'any', as we
-          *       will emit `undefined`.
-          *    If 'node.parent' is a member with an identifier, numeric, or string literal name,
-          *       the effective argument type will be a string literal type for the member name.
-          *    If 'node.parent' is a computed property name, the effective argument type will
-          *       either be a symbol type or the string type.
-          * If 'node' is a member with an identifier, numeric, or string literal name, the
-          *    effective argument type will be a string literal type for the member name.
-          * If 'node' is a computed property name, the effective argument type will either
-          *    be a symbol type or the string type.
-          * A class decorator does not have a second argument type.
-          */
-        function getEffectiveDecoratorSecondArgumentType(node) {
-            // The second argument to a decorator is its `propertyKey`
-            if (node.kind === 221 /* ClassDeclaration */) {
-                ts.Debug.fail("Class decorators should not have a second synthetic argument.");
-                return unknownType;
-            }
-            if (node.kind === 142 /* Parameter */) {
-                node = node.parent;
-                if (node.kind === 148 /* Constructor */) {
-                    // For a constructor parameter decorator, the `propertyKey` will be `undefined`.
-                    return anyType;
+        function parameterNameStartsWithUnderscore(parameterName) {
+            return parameterName && isIdentifierThatStartsWithUnderScore(parameterName);
+        }
+        function isIdentifierThatStartsWithUnderScore(node) {
+            return node.kind === 71 /* Identifier */ && node.text.charCodeAt(0) === 95 /* _ */;
+        }
+        function checkUnusedClassMembers(node) {
+            if (compilerOptions.noUnusedLocals && !ts.isInAmbientContext(node)) {
+                if (node.members) {
+                    for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
+                        var member = _a[_i];
+                        if (member.kind === 151 /* MethodDeclaration */ || member.kind === 149 /* PropertyDeclaration */) {
+                            if (!member.symbol.isReferenced && ts.getModifierFlags(member) & 8 /* Private */) {
+                                error(member.name, ts.Diagnostics._0_is_declared_but_never_used, member.symbol.name);
+                            }
+                        }
+                        else if (member.kind === 152 /* Constructor */) {
+                            for (var _b = 0, _c = member.parameters; _b < _c.length; _b++) {
+                                var parameter = _c[_b];
+                                if (!parameter.symbol.isReferenced && ts.getModifierFlags(parameter) & 8 /* Private */) {
+                                    error(parameter.name, ts.Diagnostics.Property_0_is_declared_but_never_used, parameter.symbol.name);
+                                }
+                            }
+                        }
+                    }
                 }
             }
-            if (node.kind === 145 /* PropertyDeclaration */ ||
-                node.kind === 147 /* MethodDeclaration */ ||
-                node.kind === 149 /* GetAccessor */ ||
-                node.kind === 150 /* SetAccessor */) {
-                // The `propertyKey` for a property or method decorator will be a
-                // string literal type if the member name is an identifier, number, or string;
-                // otherwise, if the member name is a computed property name it will
-                // be either string or symbol.
-                var element = node;
-                switch (element.name.kind) {
-                    case 69 /* Identifier */:
-                    case 8 /* NumericLiteral */:
-                    case 9 /* StringLiteral */:
-                        return getLiteralTypeForText(32 /* StringLiteral */, element.name.text);
-                    case 140 /* ComputedPropertyName */:
-                        var nameType = checkComputedPropertyName(element.name);
-                        if (isTypeOfKind(nameType, 512 /* ESSymbol */)) {
-                            return nameType;
-                        }
-                        else {
-                            return stringType;
+        }
+        function checkUnusedTypeParameters(node) {
+            if (compilerOptions.noUnusedLocals && !ts.isInAmbientContext(node)) {
+                if (node.typeParameters) {
+                    // Only report errors on the last declaration for the type parameter container;
+                    // this ensures that all uses have been accounted for.
+                    var symbol = getSymbolOfNode(node);
+                    var lastDeclaration = symbol && symbol.declarations && ts.lastOrUndefined(symbol.declarations);
+                    if (lastDeclaration !== node) {
+                        return;
+                    }
+                    for (var _i = 0, _a = node.typeParameters; _i < _a.length; _i++) {
+                        var typeParameter = _a[_i];
+                        if (!getMergedSymbol(typeParameter.symbol).isReferenced) {
+                            error(typeParameter.name, ts.Diagnostics._0_is_declared_but_never_used, typeParameter.symbol.name);
                         }
-                    default:
-                        ts.Debug.fail("Unsupported property name.");
-                        return unknownType;
+                    }
                 }
             }
-            ts.Debug.fail("Unsupported decorator target.");
-            return unknownType;
         }
-        /**
-          * Returns the effective argument type for the third argument to a decorator.
-          * If 'node' is a parameter, the effective argument type is the number type.
-          * If 'node' is a method or accessor, the effective argument type is a
-          *    `TypedPropertyDescriptor<T>` instantiated with the type of the member.
-          * Class and property decorators do not have a third effective argument.
-          */
-        function getEffectiveDecoratorThirdArgumentType(node) {
-            // The third argument to a decorator is either its `descriptor` for a method decorator
-            // or its `parameterIndex` for a parameter decorator
-            if (node.kind === 221 /* ClassDeclaration */) {
-                ts.Debug.fail("Class decorators should not have a third synthetic argument.");
-                return unknownType;
+        function checkUnusedModuleMembers(node) {
+            if (compilerOptions.noUnusedLocals && !ts.isInAmbientContext(node)) {
+                node.locals.forEach(function (local) {
+                    if (!local.isReferenced && !local.exportSymbol) {
+                        for (var _i = 0, _a = local.declarations; _i < _a.length; _i++) {
+                            var declaration = _a[_i];
+                            if (!ts.isAmbientModule(declaration)) {
+                                errorUnusedLocal(ts.getNameOfDeclaration(declaration), local.name);
+                            }
+                        }
+                    }
+                });
             }
-            if (node.kind === 142 /* Parameter */) {
-                // The `parameterIndex` for a parameter decorator is always a number
-                return numberType;
+        }
+        function checkBlock(node) {
+            // Grammar checking for SyntaxKind.Block
+            if (node.kind === 207 /* Block */) {
+                checkGrammarStatementInAmbientContext(node);
             }
-            if (node.kind === 145 /* PropertyDeclaration */) {
-                ts.Debug.fail("Property decorators should not have a third synthetic argument.");
-                return unknownType;
+            ts.forEach(node.statements, checkSourceElement);
+            if (node.locals) {
+                registerForUnusedIdentifiersCheck(node);
             }
-            if (node.kind === 147 /* MethodDeclaration */ ||
-                node.kind === 149 /* GetAccessor */ ||
-                node.kind === 150 /* SetAccessor */) {
-                // The `descriptor` for a method decorator will be a `TypedPropertyDescriptor<T>`
-                // for the type of the member.
-                var propertyType = getTypeOfNode(node);
-                return createTypedPropertyDescriptorType(propertyType);
+        }
+        function checkCollisionWithArgumentsInGeneratedCode(node) {
+            // no rest parameters \ declaration context \ overload - no codegen impact
+            if (!ts.hasDeclaredRestParameter(node) || ts.isInAmbientContext(node) || ts.nodeIsMissing(node.body)) {
+                return;
             }
-            ts.Debug.fail("Unsupported decorator target.");
-            return unknownType;
+            ts.forEach(node.parameters, function (p) {
+                if (p.name && !ts.isBindingPattern(p.name) && p.name.text === argumentsSymbol.name) {
+                    error(p, ts.Diagnostics.Duplicate_identifier_arguments_Compiler_uses_arguments_to_initialize_rest_parameters);
+                }
+            });
         }
-        /**
-          * Returns the effective argument type for the provided argument to a decorator.
-          */
-        function getEffectiveDecoratorArgumentType(node, argIndex) {
-            if (argIndex === 0) {
-                return getEffectiveDecoratorFirstArgumentType(node.parent);
+        function needCollisionCheckForIdentifier(node, identifier, name) {
+            if (!(identifier && identifier.text === name)) {
+                return false;
             }
-            else if (argIndex === 1) {
-                return getEffectiveDecoratorSecondArgumentType(node.parent);
+            if (node.kind === 149 /* PropertyDeclaration */ ||
+                node.kind === 148 /* PropertySignature */ ||
+                node.kind === 151 /* MethodDeclaration */ ||
+                node.kind === 150 /* MethodSignature */ ||
+                node.kind === 153 /* GetAccessor */ ||
+                node.kind === 154 /* SetAccessor */) {
+                // it is ok to have member named '_super' or '_this' - member access is always qualified
+                return false;
             }
-            else if (argIndex === 2) {
-                return getEffectiveDecoratorThirdArgumentType(node.parent);
+            if (ts.isInAmbientContext(node)) {
+                // ambient context - no codegen impact
+                return false;
             }
-            ts.Debug.fail("Decorators should not have a fourth synthetic argument.");
-            return unknownType;
-        }
-        /**
-          * Gets the effective argument type for an argument in a call expression.
-          */
-        function getEffectiveArgumentType(node, argIndex, arg) {
-            // Decorators provide special arguments, a tagged template expression provides
-            // a special first argument, and string literals get string literal types
-            // unless we're reporting errors
-            if (node.kind === 143 /* Decorator */) {
-                return getEffectiveDecoratorArgumentType(node, argIndex);
+            var root = ts.getRootDeclaration(node);
+            if (root.kind === 146 /* Parameter */ && ts.nodeIsMissing(root.parent.body)) {
+                // just an overload - no codegen impact
+                return false;
             }
-            else if (argIndex === 0 && node.kind === 176 /* TaggedTemplateExpression */) {
-                return getGlobalTemplateStringsArrayType();
+            return true;
+        }
+        function checkCollisionWithCapturedThisVariable(node, name) {
+            if (needCollisionCheckForIdentifier(node, name, "_this")) {
+                potentialThisCollisions.push(node);
             }
-            // This is not a synthetic argument, so we return 'undefined'
-            // to signal that the caller needs to check the argument.
-            return undefined;
         }
-        /**
-          * Gets the effective argument expression for an argument in a call expression.
-          */
-        function getEffectiveArgument(node, args, argIndex) {
-            // For a decorator or the first argument of a tagged template expression we return undefined.
-            if (node.kind === 143 /* Decorator */ ||
-                (argIndex === 0 && node.kind === 176 /* TaggedTemplateExpression */)) {
-                return undefined;
+        function checkCollisionWithCapturedNewTargetVariable(node, name) {
+            if (needCollisionCheckForIdentifier(node, name, "_newTarget")) {
+                potentialNewTargetCollisions.push(node);
             }
-            return args[argIndex];
         }
-        /**
-          * Gets the error node to use when reporting errors for an effective argument.
-          */
-        function getEffectiveArgumentErrorNode(node, argIndex, arg) {
-            if (node.kind === 143 /* Decorator */) {
-                // For a decorator, we use the expression of the decorator for error reporting.
-                return node.expression;
+        // this function will run after checking the source file so 'CaptureThis' is correct for all nodes
+        function checkIfThisIsCapturedInEnclosingScope(node) {
+            ts.findAncestor(node, function (current) {
+                if (getNodeCheckFlags(current) & 4 /* CaptureThis */) {
+                    var isDeclaration_1 = node.kind !== 71 /* Identifier */;
+                    if (isDeclaration_1) {
+                        error(ts.getNameOfDeclaration(node), ts.Diagnostics.Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference);
+                    }
+                    else {
+                        error(node, ts.Diagnostics.Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference);
+                    }
+                    return true;
+                }
+            });
+        }
+        function checkIfNewTargetIsCapturedInEnclosingScope(node) {
+            ts.findAncestor(node, function (current) {
+                if (getNodeCheckFlags(current) & 8 /* CaptureNewTarget */) {
+                    var isDeclaration_2 = node.kind !== 71 /* Identifier */;
+                    if (isDeclaration_2) {
+                        error(ts.getNameOfDeclaration(node), ts.Diagnostics.Duplicate_identifier_newTarget_Compiler_uses_variable_declaration_newTarget_to_capture_new_target_meta_property_reference);
+                    }
+                    else {
+                        error(node, ts.Diagnostics.Expression_resolves_to_variable_declaration_newTarget_that_compiler_uses_to_capture_new_target_meta_property_reference);
+                    }
+                    return true;
+                }
+            });
+        }
+        function checkCollisionWithCapturedSuperVariable(node, name) {
+            if (!needCollisionCheckForIdentifier(node, name, "_super")) {
+                return;
             }
-            else if (argIndex === 0 && node.kind === 176 /* TaggedTemplateExpression */) {
-                // For a the first argument of a tagged template expression, we use the template of the tag for error reporting.
-                return node.template;
+            // bubble up and find containing type
+            var enclosingClass = ts.getContainingClass(node);
+            // if containing type was not found or it is ambient - exit (no codegen)
+            if (!enclosingClass || ts.isInAmbientContext(enclosingClass)) {
+                return;
             }
-            else {
-                return arg;
+            if (ts.getClassExtendsHeritageClauseElement(enclosingClass)) {
+                var isDeclaration_3 = node.kind !== 71 /* Identifier */;
+                if (isDeclaration_3) {
+                    error(node, ts.Diagnostics.Duplicate_identifier_super_Compiler_uses_super_to_capture_base_class_reference);
+                }
+                else {
+                    error(node, ts.Diagnostics.Expression_resolves_to_super_that_compiler_uses_to_capture_base_class_reference);
+                }
             }
         }
-        function resolveCall(node, signatures, candidatesOutArray, headMessage) {
-            var isTaggedTemplate = node.kind === 176 /* TaggedTemplateExpression */;
-            var isDecorator = node.kind === 143 /* Decorator */;
-            var typeArguments;
-            if (!isTaggedTemplate && !isDecorator) {
-                typeArguments = node.typeArguments;
-                // We already perform checking on the type arguments on the class declaration itself.
-                if (node.expression.kind !== 95 /* SuperKeyword */) {
-                    ts.forEach(typeArguments, checkSourceElement);
-                }
+        function checkCollisionWithRequireExportsInGeneratedCode(node, name) {
+            // No need to check for require or exports for ES6 modules and later
+            if (modulekind >= ts.ModuleKind.ES2015) {
+                return;
             }
-            var candidates = candidatesOutArray || [];
-            // reorderCandidates fills up the candidates array directly
-            reorderCandidates(signatures, candidates);
-            if (!candidates.length) {
-                reportError(ts.Diagnostics.Supplied_parameters_do_not_match_any_signature_of_call_target);
-                return resolveErrorCall(node);
+            if (!needCollisionCheckForIdentifier(node, name, "require") && !needCollisionCheckForIdentifier(node, name, "exports")) {
+                return;
             }
-            var args = getEffectiveCallArguments(node);
-            // The following applies to any value of 'excludeArgument[i]':
-            //    - true:      the argument at 'i' is susceptible to a one-time permanent contextual typing.
-            //    - undefined: the argument at 'i' is *not* susceptible to permanent contextual typing.
-            //    - false:     the argument at 'i' *was* and *has been* permanently contextually typed.
-            //
-            // The idea is that we will perform type argument inference & assignability checking once
-            // without using the susceptible parameters that are functions, and once more for each of those
-            // parameters, contextually typing each as we go along.
-            //
-            // For a tagged template, then the first argument be 'undefined' if necessary
-            // because it represents a TemplateStringsArray.
-            //
-            // For a decorator, no arguments are susceptible to contextual typing due to the fact
-            // decorators are applied to a declaration by the emitter, and not to an expression.
-            var excludeArgument;
-            if (!isDecorator) {
-                // We do not need to call `getEffectiveArgumentCount` here as it only
-                // applies when calculating the number of arguments for a decorator.
-                for (var i = isTaggedTemplate ? 1 : 0; i < args.length; i++) {
-                    if (isContextSensitive(args[i])) {
-                        if (!excludeArgument) {
-                            excludeArgument = new Array(args.length);
-                        }
-                        excludeArgument[i] = true;
-                    }
-                }
+            // Uninstantiated modules shouldnt do this check
+            if (node.kind === 233 /* ModuleDeclaration */ && ts.getModuleInstanceState(node) !== 1 /* Instantiated */) {
+                return;
             }
-            // The following variables are captured and modified by calls to chooseOverload.
-            // If overload resolution or type argument inference fails, we want to report the
-            // best error possible. The best error is one which says that an argument was not
-            // assignable to a parameter. This implies that everything else about the overload
-            // was fine. So if there is any overload that is only incorrect because of an
-            // argument, we will report an error on that one.
-            //
-            //     function foo(s: string) {}
-            //     function foo(n: number) {} // Report argument error on this overload
-            //     function foo() {}
-            //     foo(true);
-            //
-            // If none of the overloads even made it that far, there are two possibilities.
-            // There was a problem with type arguments for some overload, in which case
-            // report an error on that. Or none of the overloads even had correct arity,
-            // in which case give an arity error.
-            //
-            //     function foo<T>(x: T, y: T) {} // Report type argument inference error
-            //     function foo() {}
-            //     foo(0, true);
-            //
-            var candidateForArgumentError;
-            var candidateForTypeArgumentError;
-            var resultOfFailedInference;
-            var result;
-            // If we are in signature help, a trailing comma indicates that we intend to provide another argument,
-            // so we will only accept overloads with arity at least 1 higher than the current number of provided arguments.
-            var signatureHelpTrailingComma = candidatesOutArray && node.kind === 174 /* CallExpression */ && node.arguments.hasTrailingComma;
-            // Section 4.12.1:
-            // if the candidate list contains one or more signatures for which the type of each argument
-            // expression is a subtype of each corresponding parameter type, the return type of the first
-            // of those signatures becomes the return type of the function call.
-            // Otherwise, the return type of the first signature in the candidate list becomes the return
-            // type of the function call.
-            //
-            // Whether the call is an error is determined by assignability of the arguments. The subtype pass
-            // is just important for choosing the best signature. So in the case where there is only one
-            // signature, the subtype pass is useless. So skipping it is an optimization.
-            if (candidates.length > 1) {
-                result = chooseOverload(candidates, subtypeRelation, signatureHelpTrailingComma);
+            // In case of variable declaration, node.parent is variable statement so look at the variable statement's parent
+            var parent = getDeclarationContainer(node);
+            if (parent.kind === 265 /* SourceFile */ && ts.isExternalOrCommonJsModule(parent)) {
+                // If the declaration happens to be in external module, report error that require and exports are reserved keywords
+                error(name, ts.Diagnostics.Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module, ts.declarationNameToString(name), ts.declarationNameToString(name));
             }
-            if (!result) {
-                // Reinitialize these pointers for round two
-                candidateForArgumentError = undefined;
-                candidateForTypeArgumentError = undefined;
-                resultOfFailedInference = undefined;
-                result = chooseOverload(candidates, assignableRelation, signatureHelpTrailingComma);
+        }
+        function checkCollisionWithGlobalPromiseInGeneratedCode(node, name) {
+            if (languageVersion >= 4 /* ES2017 */ || !needCollisionCheckForIdentifier(node, name, "Promise")) {
+                return;
             }
-            if (result) {
-                return result;
+            // Uninstantiated modules shouldnt do this check
+            if (node.kind === 233 /* ModuleDeclaration */ && ts.getModuleInstanceState(node) !== 1 /* Instantiated */) {
+                return;
             }
-            // No signatures were applicable. Now report errors based on the last applicable signature with
-            // no arguments excluded from assignability checks.
-            // If candidate is undefined, it means that no candidates had a suitable arity. In that case,
-            // skip the checkApplicableSignature check.
-            if (candidateForArgumentError) {
-                // excludeArgument is undefined, in this case also equivalent to [undefined, undefined, ...]
-                // The importance of excludeArgument is to prevent us from typing function expression parameters
-                // in arguments too early. If possible, we'd like to only type them once we know the correct
-                // overload. However, this matters for the case where the call is correct. When the call is
-                // an error, we don't need to exclude any arguments, although it would cause no harm to do so.
-                checkApplicableSignature(node, args, candidateForArgumentError, assignableRelation, /*excludeArgument*/ undefined, /*reportErrors*/ true);
+            // In case of variable declaration, node.parent is variable statement so look at the variable statement's parent
+            var parent = getDeclarationContainer(node);
+            if (parent.kind === 265 /* SourceFile */ && ts.isExternalOrCommonJsModule(parent) && parent.flags & 1024 /* HasAsyncFunctions */) {
+                // If the declaration happens to be in external module, report error that Promise is a reserved identifier.
+                error(name, ts.Diagnostics.Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_containing_async_functions, ts.declarationNameToString(name), ts.declarationNameToString(name));
             }
-            else if (candidateForTypeArgumentError) {
-                if (!isTaggedTemplate && !isDecorator && typeArguments) {
-                    var typeArguments_2 = node.typeArguments;
-                    checkTypeArguments(candidateForTypeArgumentError, typeArguments_2, ts.map(typeArguments_2, getTypeFromTypeNodeNoAlias), /*reportErrors*/ true, headMessage);
-                }
-                else {
-                    ts.Debug.assert(resultOfFailedInference.failedTypeParameterIndex >= 0);
-                    var failedTypeParameter = candidateForTypeArgumentError.typeParameters[resultOfFailedInference.failedTypeParameterIndex];
-                    var inferenceCandidates = getInferenceCandidates(resultOfFailedInference, resultOfFailedInference.failedTypeParameterIndex);
-                    var diagnosticChainHead = ts.chainDiagnosticMessages(/*details*/ undefined, // details will be provided by call to reportNoCommonSupertypeError
-                    ts.Diagnostics.The_type_argument_for_type_parameter_0_cannot_be_inferred_from_the_usage_Consider_specifying_the_type_arguments_explicitly, typeToString(failedTypeParameter));
-                    if (headMessage) {
-                        diagnosticChainHead = ts.chainDiagnosticMessages(diagnosticChainHead, headMessage);
-                    }
-                    reportNoCommonSupertypeError(inferenceCandidates, node.expression || node.tag, diagnosticChainHead);
-                }
+        }
+        function checkVarDeclaredNamesNotShadowed(node) {
+            // - ScriptBody : StatementList
+            // It is a Syntax Error if any element of the LexicallyDeclaredNames of StatementList
+            // also occurs in the VarDeclaredNames of StatementList.
+            // - Block : { StatementList }
+            // It is a Syntax Error if any element of the LexicallyDeclaredNames of StatementList
+            // also occurs in the VarDeclaredNames of StatementList.
+            // Variable declarations are hoisted to the top of their function scope. They can shadow
+            // block scoped declarations, which bind tighter. this will not be flagged as duplicate definition
+            // by the binder as the declaration scope is different.
+            // A non-initialized declaration is a no-op as the block declaration will resolve before the var
+            // declaration. the problem is if the declaration has an initializer. this will act as a write to the
+            // block declared value. this is fine for let, but not const.
+            // Only consider declarations with initializers, uninitialized const declarations will not
+            // step on a let/const variable.
+            // Do not consider const and const declarations, as duplicate block-scoped declarations
+            // are handled by the binder.
+            // We are only looking for const declarations that step on let\const declarations from a
+            // different scope. e.g.:
+            //      {
+            //          const x = 0; // localDeclarationSymbol obtained after name resolution will correspond to this declaration
+            //          const x = 0; // symbol for this declaration will be 'symbol'
+            //      }
+            // skip block-scoped variables and parameters
+            if ((ts.getCombinedNodeFlags(node) & 3 /* BlockScoped */) !== 0 || ts.isParameterDeclaration(node)) {
+                return;
             }
-            else {
-                reportError(ts.Diagnostics.Supplied_parameters_do_not_match_any_signature_of_call_target);
+            // skip variable declarations that don't have initializers
+            // NOTE: in ES6 spec initializer is required in variable declarations where name is binding pattern
+            // so we'll always treat binding elements as initialized
+            if (node.kind === 226 /* VariableDeclaration */ && !node.initializer) {
+                return;
             }
-            // No signature was applicable. We have already reported the errors for the invalid signature.
-            // If this is a type resolution session, e.g. Language Service, try to get better information that anySignature.
-            // Pick the first candidate that matches the arity. This way we can get a contextual type for cases like:
-            //  declare function f(a: { xa: number; xb: number; });
-            //  f({ |
-            if (!produceDiagnostics) {
-                for (var _i = 0, candidates_1 = candidates; _i < candidates_1.length; _i++) {
-                    var candidate = candidates_1[_i];
-                    if (hasCorrectArity(node, args, candidate)) {
-                        if (candidate.typeParameters && typeArguments) {
-                            candidate = getSignatureInstantiation(candidate, ts.map(typeArguments, getTypeFromTypeNodeNoAlias));
+            var symbol = getSymbolOfNode(node);
+            if (symbol.flags & 1 /* FunctionScopedVariable */) {
+                var localDeclarationSymbol = resolveName(node, node.name.text, 3 /* Variable */, /*nodeNotFoundErrorMessage*/ undefined, /*nameArg*/ undefined);
+                if (localDeclarationSymbol &&
+                    localDeclarationSymbol !== symbol &&
+                    localDeclarationSymbol.flags & 2 /* BlockScopedVariable */) {
+                    if (getDeclarationNodeFlagsFromSymbol(localDeclarationSymbol) & 3 /* BlockScoped */) {
+                        var varDeclList = ts.getAncestor(localDeclarationSymbol.valueDeclaration, 227 /* VariableDeclarationList */);
+                        var container = varDeclList.parent.kind === 208 /* VariableStatement */ && varDeclList.parent.parent
+                            ? varDeclList.parent.parent
+                            : undefined;
+                        // names of block-scoped and function scoped variables can collide only
+                        // if block scoped variable is defined in the function\module\source file scope (because of variable hoisting)
+                        var namesShareScope = container &&
+                            (container.kind === 207 /* Block */ && ts.isFunctionLike(container.parent) ||
+                                container.kind === 234 /* ModuleBlock */ ||
+                                container.kind === 233 /* ModuleDeclaration */ ||
+                                container.kind === 265 /* SourceFile */);
+                        // here we know that function scoped variable is shadowed by block scoped one
+                        // if they are defined in the same scope - binder has already reported redeclaration error
+                        // otherwise if variable has an initializer - show error that initialization will fail
+                        // since LHS will be block scoped name instead of function scoped
+                        if (!namesShareScope) {
+                            var name_28 = symbolToString(localDeclarationSymbol);
+                            error(node, ts.Diagnostics.Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1, name_28, name_28);
                         }
-                        return candidate;
                     }
                 }
             }
-            return resolveErrorCall(node);
-            function reportError(message, arg0, arg1, arg2) {
-                var errorInfo;
-                errorInfo = ts.chainDiagnosticMessages(errorInfo, message, arg0, arg1, arg2);
-                if (headMessage) {
-                    errorInfo = ts.chainDiagnosticMessages(errorInfo, headMessage);
-                }
-                diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(node, errorInfo));
+        }
+        // Check that a parameter initializer contains no references to parameters declared to the right of itself
+        function checkParameterInitializer(node) {
+            if (ts.getRootDeclaration(node).kind !== 146 /* Parameter */) {
+                return;
             }
-            function chooseOverload(candidates, relation, signatureHelpTrailingComma) {
-                if (signatureHelpTrailingComma === void 0) { signatureHelpTrailingComma = false; }
-                for (var _i = 0, candidates_2 = candidates; _i < candidates_2.length; _i++) {
-                    var originalCandidate = candidates_2[_i];
-                    if (!hasCorrectArity(node, args, originalCandidate, signatureHelpTrailingComma)) {
-                        continue;
-                    }
-                    var candidate = void 0;
-                    var typeArgumentsAreValid = void 0;
-                    var inferenceContext = originalCandidate.typeParameters
-                        ? createInferenceContext(originalCandidate, /*inferUnionTypes*/ false)
-                        : undefined;
-                    while (true) {
-                        candidate = originalCandidate;
-                        if (candidate.typeParameters) {
-                            var typeArgumentTypes = void 0;
-                            if (typeArguments) {
-                                typeArgumentTypes = ts.map(typeArguments, getTypeFromTypeNodeNoAlias);
-                                typeArgumentsAreValid = checkTypeArguments(candidate, typeArguments, typeArgumentTypes, /*reportErrors*/ false);
-                            }
-                            else {
-                                inferTypeArguments(node, candidate, args, excludeArgument, inferenceContext);
-                                typeArgumentsAreValid = inferenceContext.failedTypeParameterIndex === undefined;
-                                typeArgumentTypes = inferenceContext.inferredTypes;
-                            }
-                            if (!typeArgumentsAreValid) {
-                                break;
-                            }
-                            candidate = getSignatureInstantiation(candidate, typeArgumentTypes);
-                        }
-                        if (!checkApplicableSignature(node, args, candidate, relation, excludeArgument, /*reportErrors*/ false)) {
-                            break;
-                        }
-                        var index = excludeArgument ? ts.indexOf(excludeArgument, true) : -1;
-                        if (index < 0) {
-                            return candidate;
-                        }
-                        excludeArgument[index] = false;
+            var func = ts.getContainingFunction(node);
+            visit(node.initializer);
+            function visit(n) {
+                if (ts.isTypeNode(n) || ts.isDeclarationName(n)) {
+                    // do not dive in types
+                    // skip declaration names (i.e. in object literal expressions)
+                    return;
+                }
+                if (n.kind === 179 /* PropertyAccessExpression */) {
+                    // skip property names in property access expression
+                    return visit(n.expression);
+                }
+                else if (n.kind === 71 /* Identifier */) {
+                    // check FunctionLikeDeclaration.locals (stores parameters\function local variable)
+                    // if it contains entry with a specified name
+                    var symbol = resolveName(n, n.text, 107455 /* Value */ | 8388608 /* Alias */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined);
+                    if (!symbol || symbol === unknownSymbol || !symbol.valueDeclaration) {
+                        return;
                     }
-                    // A post-mortem of this iteration of the loop. The signature was not applicable,
-                    // so we want to track it as a candidate for reporting an error. If the candidate
-                    // had no type parameters, or had no issues related to type arguments, we can
-                    // report an error based on the arguments. If there was an issue with type
-                    // arguments, then we can only report an error based on the type arguments.
-                    if (originalCandidate.typeParameters) {
-                        var instantiatedCandidate = candidate;
-                        if (typeArgumentsAreValid) {
-                            candidateForArgumentError = instantiatedCandidate;
-                        }
-                        else {
-                            candidateForTypeArgumentError = originalCandidate;
-                            if (!typeArguments) {
-                                resultOfFailedInference = inferenceContext;
+                    if (symbol.valueDeclaration === node) {
+                        error(n, ts.Diagnostics.Parameter_0_cannot_be_referenced_in_its_initializer, ts.declarationNameToString(node.name));
+                        return;
+                    }
+                    // locals map for function contain both parameters and function locals
+                    // so we need to do a bit of extra work to check if reference is legal
+                    var enclosingContainer = ts.getEnclosingBlockScopeContainer(symbol.valueDeclaration);
+                    if (enclosingContainer === func) {
+                        if (symbol.valueDeclaration.kind === 146 /* Parameter */ ||
+                            symbol.valueDeclaration.kind === 176 /* BindingElement */) {
+                            // it is ok to reference parameter in initializer if either
+                            // - parameter is located strictly on the left of current parameter declaration
+                            if (symbol.valueDeclaration.pos < node.pos) {
+                                return;
+                            }
+                            // - parameter is wrapped in function-like entity
+                            if (ts.findAncestor(n, function (current) {
+                                if (current === node.initializer) {
+                                    return "quit";
+                                }
+                                return ts.isFunctionLike(current.parent) ||
+                                    // computed property names/initializers in instance property declaration of class like entities
+                                    // are executed in constructor and thus deferred
+                                    (current.parent.kind === 149 /* PropertyDeclaration */ &&
+                                        !(ts.hasModifier(current.parent, 32 /* Static */)) &&
+                                        ts.isClassLike(current.parent.parent));
+                            })) {
+                                return;
                             }
+                            // fall through to report error
                         }
-                    }
-                    else {
-                        ts.Debug.assert(originalCandidate === candidate);
-                        candidateForArgumentError = originalCandidate;
+                        error(n, ts.Diagnostics.Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it, ts.declarationNameToString(node.name), ts.declarationNameToString(n));
                     }
                 }
-                return undefined;
+                else {
+                    return ts.forEachChild(n, visit);
+                }
             }
         }
-        function resolveCallExpression(node, candidatesOutArray) {
-            if (node.expression.kind === 95 /* SuperKeyword */) {
-                var superType = checkSuperExpression(node.expression);
-                if (superType !== unknownType) {
-                    // In super call, the candidate signatures are the matching arity signatures of the base constructor function instantiated
-                    // with the type arguments specified in the extends clause.
-                    var baseTypeNode = ts.getClassExtendsHeritageClauseElement(ts.getContainingClass(node));
-                    if (baseTypeNode) {
-                        var baseConstructors = getInstantiatedConstructorsForTypeArguments(superType, baseTypeNode.typeArguments);
-                        return resolveCall(node, baseConstructors, candidatesOutArray);
-                    }
+        function convertAutoToAny(type) {
+            return type === autoType ? anyType : type === autoArrayType ? anyArrayType : type;
+        }
+        // Check variable, parameter, or property declaration
+        function checkVariableLikeDeclaration(node) {
+            checkDecorators(node);
+            checkSourceElement(node.type);
+            // For a computed property, just check the initializer and exit
+            // Do not use hasDynamicName here, because that returns false for well known symbols.
+            // We want to perform checkComputedPropertyName for all computed properties, including
+            // well known symbols.
+            if (node.name.kind === 144 /* ComputedPropertyName */) {
+                checkComputedPropertyName(node.name);
+                if (node.initializer) {
+                    checkExpressionCached(node.initializer);
                 }
-                return resolveUntypedCall(node);
-            }
-            var funcType = checkNonNullExpression(node.expression);
-            if (funcType === silentNeverType) {
-                return silentNeverSignature;
-            }
-            var apparentType = getApparentType(funcType);
-            if (apparentType === unknownType) {
-                // Another error has already been reported
-                return resolveErrorCall(node);
             }
-            // Technically, this signatures list may be incomplete. We are taking the apparent type,
-            // but we are not including call signatures that may have been added to the Object or
-            // Function interface, since they have none by default. This is a bit of a leap of faith
-            // that the user will not add any.
-            var callSignatures = getSignaturesOfType(apparentType, 0 /* Call */);
-            var constructSignatures = getSignaturesOfType(apparentType, 1 /* Construct */);
-            // TS 1.0 Spec: 4.12
-            // In an untyped function call no TypeArgs are permitted, Args can be any argument list, no contextual
-            // types are provided for the argument expressions, and the result is always of type Any.
-            if (isUntypedFunctionCall(funcType, apparentType, callSignatures.length, constructSignatures.length)) {
-                // The unknownType indicates that an error already occurred (and was reported).  No
-                // need to report another error in this case.
-                if (funcType !== unknownType && node.typeArguments) {
-                    error(node, ts.Diagnostics.Untyped_function_calls_may_not_accept_type_arguments);
+            if (node.kind === 176 /* BindingElement */) {
+                if (node.parent.kind === 174 /* ObjectBindingPattern */ && languageVersion < 5 /* ESNext */) {
+                    checkExternalEmitHelpers(node, 4 /* Rest */);
                 }
-                return resolveUntypedCall(node);
-            }
-            // If FuncExpr's apparent type(section 3.8.1) is a function type, the call is a typed function call.
-            // TypeScript employs overload resolution in typed function calls in order to support functions
-            // with multiple call signatures.
-            if (!callSignatures.length) {
-                if (constructSignatures.length) {
-                    error(node, ts.Diagnostics.Value_of_type_0_is_not_callable_Did_you_mean_to_include_new, typeToString(funcType));
+                // check computed properties inside property names of binding elements
+                if (node.propertyName && node.propertyName.kind === 144 /* ComputedPropertyName */) {
+                    checkComputedPropertyName(node.propertyName);
                 }
-                else {
-                    error(node, ts.Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures, typeToString(apparentType));
+                // check private/protected variable access
+                var parent_14 = node.parent.parent;
+                var parentType = getTypeForBindingElementParent(parent_14);
+                var name_29 = node.propertyName || node.name;
+                var property = getPropertyOfType(parentType, ts.getTextOfPropertyName(name_29));
+                markPropertyAsReferenced(property);
+                if (parent_14.initializer && property) {
+                    checkPropertyAccessibility(parent_14, parent_14.initializer, parentType, property);
                 }
-                return resolveErrorCall(node);
             }
-            return resolveCall(node, callSignatures, candidatesOutArray);
-        }
-        /**
-         * TS 1.0 spec: 4.12
-         * If FuncExpr is of type Any, or of an object type that has no call or construct signatures
-         * but is a subtype of the Function interface, the call is an untyped function call.
-         */
-        function isUntypedFunctionCall(funcType, apparentFuncType, numCallSignatures, numConstructSignatures) {
-            if (isTypeAny(funcType)) {
-                return true;
+            // For a binding pattern, check contained binding elements
+            if (ts.isBindingPattern(node.name)) {
+                if (node.name.kind === 175 /* ArrayBindingPattern */ && languageVersion < 2 /* ES2015 */ && compilerOptions.downlevelIteration) {
+                    checkExternalEmitHelpers(node, 512 /* Read */);
+                }
+                ts.forEach(node.name.elements, checkSourceElement);
             }
-            if (isTypeAny(apparentFuncType) && funcType.flags & 16384 /* TypeParameter */) {
-                return true;
+            // For a parameter declaration with an initializer, error and exit if the containing function doesn't have a body
+            if (node.initializer && ts.getRootDeclaration(node).kind === 146 /* Parameter */ && ts.nodeIsMissing(ts.getContainingFunction(node).body)) {
+                error(node, ts.Diagnostics.A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation);
+                return;
             }
-            if (!numCallSignatures && !numConstructSignatures) {
-                // We exclude union types because we may have a union of function types that happen to have
-                // no common signatures.
-                if (funcType.flags & 524288 /* Union */) {
-                    return false;
+            // For a binding pattern, validate the initializer and exit
+            if (ts.isBindingPattern(node.name)) {
+                // Don't validate for-in initializer as it is already an error
+                if (node.initializer && node.parent.parent.kind !== 215 /* ForInStatement */) {
+                    checkTypeAssignableTo(checkExpressionCached(node.initializer), getWidenedTypeForVariableLikeDeclaration(node), node, /*headMessage*/ undefined);
+                    checkParameterInitializer(node);
                 }
-                return isTypeAssignableTo(funcType, globalFunctionType);
+                return;
             }
-            return false;
-        }
-        function resolveNewExpression(node, candidatesOutArray) {
-            if (node.arguments && languageVersion < 1 /* ES5 */) {
-                var spreadIndex = getSpreadArgumentIndex(node.arguments);
-                if (spreadIndex >= 0) {
-                    error(node.arguments[spreadIndex], ts.Diagnostics.Spread_operator_in_new_expressions_is_only_available_when_targeting_ECMAScript_5_and_higher);
+            var symbol = getSymbolOfNode(node);
+            var type = convertAutoToAny(getTypeOfVariableOrParameterOrProperty(symbol));
+            if (node === symbol.valueDeclaration) {
+                // Node is the primary declaration of the symbol, just validate the initializer
+                // Don't validate for-in initializer as it is already an error
+                if (node.initializer && node.parent.parent.kind !== 215 /* ForInStatement */) {
+                    checkTypeAssignableTo(checkExpressionCached(node.initializer), type, node, /*headMessage*/ undefined);
+                    checkParameterInitializer(node);
                 }
             }
-            var expressionType = checkNonNullExpression(node.expression);
-            if (expressionType === silentNeverType) {
-                return silentNeverSignature;
-            }
-            // If expressionType's apparent type(section 3.8.1) is an object type with one or
-            // more construct signatures, the expression is processed in the same manner as a
-            // function call, but using the construct signatures as the initial set of candidate
-            // signatures for overload resolution. The result type of the function call becomes
-            // the result type of the operation.
-            expressionType = getApparentType(expressionType);
-            if (expressionType === unknownType) {
-                // Another error has already been reported
-                return resolveErrorCall(node);
-            }
-            // If the expression is a class of abstract type, then it cannot be instantiated.
-            // Note, only class declarations can be declared abstract.
-            // In the case of a merged class-module or class-interface declaration,
-            // only the class declaration node will have the Abstract flag set.
-            var valueDecl = expressionType.symbol && getClassLikeDeclarationOfSymbol(expressionType.symbol);
-            if (valueDecl && ts.getModifierFlags(valueDecl) & 128 /* Abstract */) {
-                error(node, ts.Diagnostics.Cannot_create_an_instance_of_the_abstract_class_0, ts.declarationNameToString(valueDecl.name));
-                return resolveErrorCall(node);
-            }
-            // TS 1.0 spec: 4.11
-            // If expressionType is of type Any, Args can be any argument
-            // list and the result of the operation is of type Any.
-            if (isTypeAny(expressionType)) {
-                if (node.typeArguments) {
-                    error(node, ts.Diagnostics.Untyped_function_calls_may_not_accept_type_arguments);
+            else {
+                // Node is a secondary declaration, check that type is identical to primary declaration and check that
+                // initializer is consistent with type associated with the node
+                var declarationType = convertAutoToAny(getWidenedTypeForVariableLikeDeclaration(node));
+                if (type !== unknownType && declarationType !== unknownType && !isTypeIdenticalTo(type, declarationType)) {
+                    error(node.name, ts.Diagnostics.Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_type_2, ts.declarationNameToString(node.name), typeToString(type), typeToString(declarationType));
                 }
-                return resolveUntypedCall(node);
-            }
-            // Technically, this signatures list may be incomplete. We are taking the apparent type,
-            // but we are not including construct signatures that may have been added to the Object or
-            // Function interface, since they have none by default. This is a bit of a leap of faith
-            // that the user will not add any.
-            var constructSignatures = getSignaturesOfType(expressionType, 1 /* Construct */);
-            if (constructSignatures.length) {
-                if (!isConstructorAccessible(node, constructSignatures[0])) {
-                    return resolveErrorCall(node);
+                if (node.initializer) {
+                    checkTypeAssignableTo(checkExpressionCached(node.initializer), declarationType, node, /*headMessage*/ undefined);
                 }
-                return resolveCall(node, constructSignatures, candidatesOutArray);
-            }
-            // If expressionType's apparent type is an object type with no construct signatures but
-            // one or more call signatures, the expression is processed as a function call. A compile-time
-            // error occurs if the result of the function call is not Void. The type of the result of the
-            // operation is Any. It is an error to have a Void this type.
-            var callSignatures = getSignaturesOfType(expressionType, 0 /* Call */);
-            if (callSignatures.length) {
-                var signature = resolveCall(node, callSignatures, candidatesOutArray);
-                if (getReturnTypeOfSignature(signature) !== voidType) {
-                    error(node, ts.Diagnostics.Only_a_void_function_can_be_called_with_the_new_keyword);
+                if (!areDeclarationFlagsIdentical(node, symbol.valueDeclaration)) {
+                    error(ts.getNameOfDeclaration(symbol.valueDeclaration), ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
+                    error(node.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
                 }
-                if (getThisTypeOfSignature(signature) === voidType) {
-                    error(node, ts.Diagnostics.A_function_that_is_called_with_the_new_keyword_cannot_have_a_this_type_that_is_void);
+            }
+            if (node.kind !== 149 /* PropertyDeclaration */ && node.kind !== 148 /* PropertySignature */) {
+                // We know we don't have a binding pattern or computed name here
+                checkExportsOnMergedDeclarations(node);
+                if (node.kind === 226 /* VariableDeclaration */ || node.kind === 176 /* BindingElement */) {
+                    checkVarDeclaredNamesNotShadowed(node);
                 }
-                return signature;
+                checkCollisionWithCapturedSuperVariable(node, node.name);
+                checkCollisionWithCapturedThisVariable(node, node.name);
+                checkCollisionWithCapturedNewTargetVariable(node, node.name);
+                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
+                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
             }
-            error(node, ts.Diagnostics.Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature);
-            return resolveErrorCall(node);
         }
-        function isConstructorAccessible(node, signature) {
-            if (!signature || !signature.declaration) {
-                return true;
-            }
-            var declaration = signature.declaration;
-            var modifiers = ts.getModifierFlags(declaration);
-            // Public constructor is accessible.
-            if (!(modifiers & 24 /* NonPublicAccessibilityModifier */)) {
+        function areDeclarationFlagsIdentical(left, right) {
+            if ((left.kind === 146 /* Parameter */ && right.kind === 226 /* VariableDeclaration */) ||
+                (left.kind === 226 /* VariableDeclaration */ && right.kind === 146 /* Parameter */)) {
+                // Differences in optionality between parameters and variables are allowed.
                 return true;
             }
-            var declaringClassDeclaration = getClassLikeDeclarationOfSymbol(declaration.parent.symbol);
-            var declaringClass = getDeclaredTypeOfSymbol(declaration.parent.symbol);
-            // A private or protected constructor can only be instantiated within its own class (or a subclass, for protected)
-            if (!isNodeWithinClass(node, declaringClassDeclaration)) {
-                var containingClass = ts.getContainingClass(node);
-                if (containingClass) {
-                    var containingType = getTypeOfNode(containingClass);
-                    var baseTypes = getBaseTypes(containingType);
-                    if (baseTypes.length) {
-                        var baseType = baseTypes[0];
-                        if (modifiers & 16 /* Protected */ &&
-                            baseType.symbol === declaration.parent.symbol) {
-                            return true;
-                        }
-                    }
-                }
-                if (modifiers & 8 /* Private */) {
-                    error(node, ts.Diagnostics.Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration, typeToString(declaringClass));
-                }
-                if (modifiers & 16 /* Protected */) {
-                    error(node, ts.Diagnostics.Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration, typeToString(declaringClass));
-                }
+            if (ts.hasQuestionToken(left) !== ts.hasQuestionToken(right)) {
                 return false;
             }
-            return true;
-        }
-        function resolveTaggedTemplateExpression(node, candidatesOutArray) {
-            var tagType = checkExpression(node.tag);
-            var apparentType = getApparentType(tagType);
-            if (apparentType === unknownType) {
-                // Another error has already been reported
-                return resolveErrorCall(node);
-            }
-            var callSignatures = getSignaturesOfType(apparentType, 0 /* Call */);
-            var constructSignatures = getSignaturesOfType(apparentType, 1 /* Construct */);
-            if (isUntypedFunctionCall(tagType, apparentType, callSignatures.length, constructSignatures.length)) {
-                return resolveUntypedCall(node);
-            }
-            if (!callSignatures.length) {
-                error(node, ts.Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures, typeToString(apparentType));
-                return resolveErrorCall(node);
-            }
-            return resolveCall(node, callSignatures, candidatesOutArray);
-        }
-        /**
-          * Gets the localized diagnostic head message to use for errors when resolving a decorator as a call expression.
-          */
-        function getDiagnosticHeadMessageForDecoratorResolution(node) {
-            switch (node.parent.kind) {
-                case 221 /* ClassDeclaration */:
-                case 192 /* ClassExpression */:
-                    return ts.Diagnostics.Unable_to_resolve_signature_of_class_decorator_when_called_as_an_expression;
-                case 142 /* Parameter */:
-                    return ts.Diagnostics.Unable_to_resolve_signature_of_parameter_decorator_when_called_as_an_expression;
-                case 145 /* PropertyDeclaration */:
-                    return ts.Diagnostics.Unable_to_resolve_signature_of_property_decorator_when_called_as_an_expression;
-                case 147 /* MethodDeclaration */:
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                    return ts.Diagnostics.Unable_to_resolve_signature_of_method_decorator_when_called_as_an_expression;
-            }
-        }
-        /**
-          * Resolves a decorator as if it were a call expression.
-          */
-        function resolveDecorator(node, candidatesOutArray) {
-            var funcType = checkExpression(node.expression);
-            var apparentType = getApparentType(funcType);
-            if (apparentType === unknownType) {
-                return resolveErrorCall(node);
-            }
-            var callSignatures = getSignaturesOfType(apparentType, 0 /* Call */);
-            var constructSignatures = getSignaturesOfType(apparentType, 1 /* Construct */);
-            if (isUntypedFunctionCall(funcType, apparentType, callSignatures.length, constructSignatures.length)) {
-                return resolveUntypedCall(node);
-            }
-            var headMessage = getDiagnosticHeadMessageForDecoratorResolution(node);
-            if (!callSignatures.length) {
-                var errorInfo = void 0;
-                errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures, typeToString(apparentType));
-                errorInfo = ts.chainDiagnosticMessages(errorInfo, headMessage);
-                diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(node, errorInfo));
-                return resolveErrorCall(node);
-            }
-            return resolveCall(node, callSignatures, candidatesOutArray, headMessage);
-        }
-        function resolveSignature(node, candidatesOutArray) {
-            switch (node.kind) {
-                case 174 /* CallExpression */:
-                    return resolveCallExpression(node, candidatesOutArray);
-                case 175 /* NewExpression */:
-                    return resolveNewExpression(node, candidatesOutArray);
-                case 176 /* TaggedTemplateExpression */:
-                    return resolveTaggedTemplateExpression(node, candidatesOutArray);
-                case 143 /* Decorator */:
-                    return resolveDecorator(node, candidatesOutArray);
-            }
-            ts.Debug.fail("Branch in 'resolveSignature' should be unreachable.");
+            var interestingFlags = 8 /* Private */ |
+                16 /* Protected */ |
+                256 /* Async */ |
+                128 /* Abstract */ |
+                64 /* Readonly */ |
+                32 /* Static */;
+            return (ts.getModifierFlags(left) & interestingFlags) === (ts.getModifierFlags(right) & interestingFlags);
         }
-        // candidatesOutArray is passed by signature help in the language service, and collectCandidates
-        // must fill it up with the appropriate candidate signatures
-        function getResolvedSignature(node, candidatesOutArray) {
-            var links = getNodeLinks(node);
-            // If getResolvedSignature has already been called, we will have cached the resolvedSignature.
-            // However, it is possible that either candidatesOutArray was not passed in the first time,
-            // or that a different candidatesOutArray was passed in. Therefore, we need to redo the work
-            // to correctly fill the candidatesOutArray.
-            var cached = links.resolvedSignature;
-            if (cached && cached !== resolvingSignature && !candidatesOutArray) {
-                return cached;
-            }
-            links.resolvedSignature = resolvingSignature;
-            var result = resolveSignature(node, candidatesOutArray);
-            // If signature resolution originated in control flow type analysis (for example to compute the
-            // assigned type in a flow assignment) we don't cache the result as it may be based on temporary
-            // types from the control flow analysis.
-            links.resolvedSignature = flowLoopStart === flowLoopCount ? result : cached;
-            return result;
+        function checkVariableDeclaration(node) {
+            checkGrammarVariableDeclaration(node);
+            return checkVariableLikeDeclaration(node);
         }
-        function getResolvedOrAnySignature(node) {
-            // If we're already in the process of resolving the given signature, don't resolve again as
-            // that could cause infinite recursion. Instead, return anySignature.
-            return getNodeLinks(node).resolvedSignature === resolvingSignature ? resolvingSignature : getResolvedSignature(node);
+        function checkBindingElement(node) {
+            checkGrammarBindingElement(node);
+            return checkVariableLikeDeclaration(node);
         }
-        function getInferredClassType(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.inferredClassType) {
-                links.inferredClassType = createAnonymousType(symbol, symbol.members, emptyArray, emptyArray, /*stringIndexType*/ undefined, /*numberIndexType*/ undefined);
-            }
-            return links.inferredClassType;
+        function checkVariableStatement(node) {
+            // Grammar checking
+            checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarVariableDeclarationList(node.declarationList) || checkGrammarForDisallowedLetOrConstStatement(node);
+            ts.forEach(node.declarationList.declarations, checkSourceElement);
         }
-        /**
-         * Syntactically and semantically checks a call or new expression.
-         * @param node The call/new expression to be checked.
-         * @returns On success, the expression's signature's return type. On failure, anyType.
-         */
-        function checkCallExpression(node) {
-            // Grammar checking; stop grammar-checking if checkGrammarTypeArguments return true
-            checkGrammarTypeArguments(node, node.typeArguments) || checkGrammarArguments(node, node.arguments);
-            var signature = getResolvedSignature(node);
-            if (node.expression.kind === 95 /* SuperKeyword */) {
-                return voidType;
-            }
-            if (node.kind === 175 /* NewExpression */) {
-                var declaration = signature.declaration;
-                if (declaration &&
-                    declaration.kind !== 148 /* Constructor */ &&
-                    declaration.kind !== 152 /* ConstructSignature */ &&
-                    declaration.kind !== 157 /* ConstructorType */ &&
-                    !ts.isJSDocConstructSignature(declaration)) {
-                    // When resolved signature is a call signature (and not a construct signature) the result type is any, unless
-                    // the declaring function had members created through 'x.prototype.y = expr' or 'this.y = expr' psuedodeclarations
-                    // in a JS file
-                    // Note:JS inferred classes might come from a variable declaration instead of a function declaration.
-                    // In this case, using getResolvedSymbol directly is required to avoid losing the members from the declaration.
-                    var funcSymbol = node.expression.kind === 69 /* Identifier */ ?
-                        getResolvedSymbol(node.expression) :
-                        checkExpression(node.expression).symbol;
-                    if (funcSymbol && funcSymbol.members && (funcSymbol.flags & 16 /* Function */ || ts.isDeclarationOfFunctionExpression(funcSymbol))) {
-                        return getInferredClassType(funcSymbol);
-                    }
-                    else if (compilerOptions.noImplicitAny) {
-                        error(node, ts.Diagnostics.new_expression_whose_target_lacks_a_construct_signature_implicitly_has_an_any_type);
+        function checkGrammarDisallowedModifiersOnObjectLiteralExpressionMethod(node) {
+            // We only disallow modifier on a method declaration if it is a property of object-literal-expression
+            if (node.modifiers && node.parent.kind === 178 /* ObjectLiteralExpression */) {
+                if (ts.getFunctionFlags(node) & 2 /* Async */) {
+                    if (node.modifiers.length > 1) {
+                        return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
                     }
-                    return anyType;
                 }
-            }
-            // In JavaScript files, calls to any identifier 'require' are treated as external module imports
-            if (ts.isInJavaScriptFile(node) && ts.isRequireCall(node, /*checkArgumentIsStringLiteral*/ true)) {
-                return resolveExternalModuleTypeByLiteral(node.arguments[0]);
-            }
-            return getReturnTypeOfSignature(signature);
-        }
-        function checkTaggedTemplateExpression(node) {
-            return getReturnTypeOfSignature(getResolvedSignature(node));
-        }
-        function checkAssertion(node) {
-            var exprType = getRegularTypeOfObjectLiteral(getBaseTypeOfLiteralType(checkExpression(node.expression)));
-            checkSourceElement(node.type);
-            var targetType = getTypeFromTypeNode(node.type);
-            if (produceDiagnostics && targetType !== unknownType) {
-                var widenedType = getWidenedType(exprType);
-                if (!isTypeComparableTo(targetType, widenedType)) {
-                    checkTypeComparableTo(exprType, targetType, node, ts.Diagnostics.Type_0_cannot_be_converted_to_type_1);
+                else {
+                    return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
                 }
             }
-            return targetType;
         }
-        function checkNonNullAssertion(node) {
-            return getNonNullableType(checkExpression(node.expression));
+        function checkExpressionStatement(node) {
+            // Grammar checking
+            checkGrammarStatementInAmbientContext(node);
+            checkExpression(node.expression);
         }
-        function getTypeOfParameter(symbol) {
-            var type = getTypeOfSymbol(symbol);
-            if (strictNullChecks) {
-                var declaration = symbol.valueDeclaration;
-                if (declaration && declaration.initializer) {
-                    return includeFalsyTypes(type, 2048 /* Undefined */);
-                }
+        function checkIfStatement(node) {
+            // Grammar checking
+            checkGrammarStatementInAmbientContext(node);
+            checkExpression(node.expression);
+            checkSourceElement(node.thenStatement);
+            if (node.thenStatement.kind === 209 /* EmptyStatement */) {
+                error(node.thenStatement, ts.Diagnostics.The_body_of_an_if_statement_cannot_be_the_empty_statement);
             }
-            return type;
+            checkSourceElement(node.elseStatement);
         }
-        function getTypeAtPosition(signature, pos) {
-            return signature.hasRestParameter ?
-                pos < signature.parameters.length - 1 ? getTypeOfParameter(signature.parameters[pos]) : getRestTypeOfSignature(signature) :
-                pos < signature.parameters.length ? getTypeOfParameter(signature.parameters[pos]) : anyType;
+        function checkDoStatement(node) {
+            // Grammar checking
+            checkGrammarStatementInAmbientContext(node);
+            checkSourceElement(node.statement);
+            checkExpression(node.expression);
         }
-        function assignContextualParameterTypes(signature, context, mapper) {
-            var len = signature.parameters.length - (signature.hasRestParameter ? 1 : 0);
-            if (context.thisParameter) {
-                if (!signature.thisParameter) {
-                    signature.thisParameter = createTransientSymbol(context.thisParameter, undefined);
+        function checkWhileStatement(node) {
+            // Grammar checking
+            checkGrammarStatementInAmbientContext(node);
+            checkExpression(node.expression);
+            checkSourceElement(node.statement);
+        }
+        function checkForStatement(node) {
+            // Grammar checking
+            if (!checkGrammarStatementInAmbientContext(node)) {
+                if (node.initializer && node.initializer.kind === 227 /* VariableDeclarationList */) {
+                    checkGrammarVariableDeclarationList(node.initializer);
                 }
-                assignTypeToParameterAndFixTypeParameters(signature.thisParameter, getTypeOfSymbol(context.thisParameter), mapper);
             }
-            for (var i = 0; i < len; i++) {
-                var parameter = signature.parameters[i];
-                var contextualParameterType = getTypeAtPosition(context, i);
-                assignTypeToParameterAndFixTypeParameters(parameter, contextualParameterType, mapper);
+            if (node.initializer) {
+                if (node.initializer.kind === 227 /* VariableDeclarationList */) {
+                    ts.forEach(node.initializer.declarations, checkVariableDeclaration);
+                }
+                else {
+                    checkExpression(node.initializer);
+                }
             }
-            if (signature.hasRestParameter && isRestParameterIndex(context, signature.parameters.length - 1)) {
-                var parameter = ts.lastOrUndefined(signature.parameters);
-                var contextualParameterType = getTypeOfSymbol(ts.lastOrUndefined(context.parameters));
-                assignTypeToParameterAndFixTypeParameters(parameter, contextualParameterType, mapper);
+            if (node.condition)
+                checkExpression(node.condition);
+            if (node.incrementor)
+                checkExpression(node.incrementor);
+            checkSourceElement(node.statement);
+            if (node.locals) {
+                registerForUnusedIdentifiersCheck(node);
             }
         }
-        // When contextual typing assigns a type to a parameter that contains a binding pattern, we also need to push
-        // the destructured type into the contained binding elements.
-        function assignBindingElementTypes(node) {
-            if (ts.isBindingPattern(node.name)) {
-                for (var _i = 0, _a = node.name.elements; _i < _a.length; _i++) {
-                    var element = _a[_i];
-                    if (!ts.isOmittedExpression(element)) {
-                        if (element.name.kind === 69 /* Identifier */) {
-                            getSymbolLinks(getSymbolOfNode(element)).type = getTypeForBindingElement(element);
-                        }
-                        assignBindingElementTypes(element);
+        function checkForOfStatement(node) {
+            checkGrammarForInOrForOfStatement(node);
+            if (node.kind === 216 /* ForOfStatement */) {
+                if (node.awaitModifier) {
+                    var functionFlags = ts.getFunctionFlags(ts.getContainingFunction(node));
+                    if ((functionFlags & (4 /* Invalid */ | 2 /* Async */)) === 2 /* Async */ && languageVersion < 5 /* ESNext */) {
+                        // for..await..of in an async function or async generator function prior to ESNext requires the __asyncValues helper
+                        checkExternalEmitHelpers(node, 16384 /* ForAwaitOfIncludes */);
                     }
                 }
-            }
-        }
-        function assignTypeToParameterAndFixTypeParameters(parameter, contextualType, mapper) {
-            var links = getSymbolLinks(parameter);
-            if (!links.type) {
-                links.type = instantiateType(contextualType, mapper);
-                // if inference didn't come up with anything but {}, fall back to the binding pattern if present.
-                if (links.type === emptyObjectType &&
-                    (parameter.valueDeclaration.name.kind === 167 /* ObjectBindingPattern */ ||
-                        parameter.valueDeclaration.name.kind === 168 /* ArrayBindingPattern */)) {
-                    links.type = getTypeFromBindingPattern(parameter.valueDeclaration.name);
+                else if (compilerOptions.downlevelIteration && languageVersion < 2 /* ES2015 */) {
+                    // for..of prior to ES2015 requires the __values helper when downlevelIteration is enabled
+                    checkExternalEmitHelpers(node, 256 /* ForOfIncludes */);
                 }
-                assignBindingElementTypes(parameter.valueDeclaration);
-            }
-            else if (isInferentialContext(mapper)) {
-                // Even if the parameter already has a type, it might be because it was given a type while
-                // processing the function as an argument to a prior signature during overload resolution.
-                // If this was the case, it may have caused some type parameters to be fixed. So here,
-                // we need to ensure that type parameters at the same positions get fixed again. This is
-                // done by calling instantiateType to attach the mapper to the contextualType, and then
-                // calling inferTypes to force a walk of contextualType so that all the correct fixing
-                // happens. The choice to pass in links.type may seem kind of arbitrary, but it serves
-                // to make sure that all the correct positions in contextualType are reached by the walk.
-                // Here is an example:
-                //
-                //      interface Base {
-                //          baseProp;
-                //      }
-                //      interface Derived extends Base {
-                //          toBase(): Base;
-                //      }
-                //
-                //      var derived: Derived;
-                //
-                //      declare function foo<T>(x: T, func: (p: T) => T): T;
-                //      declare function foo<T>(x: T, func: (p: T) => T): T;
-                //
-                //      var result = foo(derived, d => d.toBase());
-                //
-                // We are typing d while checking the second overload. But we've already given d
-                // a type (Derived) from the first overload. However, we still want to fix the
-                // T in the second overload so that we do not infer Base as a candidate for T
-                // (inferring Base would make type argument inference inconsistent between the two
-                // overloads).
-                inferTypes(mapper.context, links.type, instantiateType(contextualType, mapper));
             }
-        }
-        function getReturnTypeFromJSDocComment(func) {
-            var returnTag = ts.getJSDocReturnTag(func);
-            if (returnTag && returnTag.typeExpression) {
-                return getTypeFromTypeNode(returnTag.typeExpression.type);
-            }
-            return undefined;
-        }
-        function createPromiseType(promisedType) {
-            // creates a `Promise<T>` type where `T` is the promisedType argument
-            var globalPromiseType = getGlobalPromiseType();
-            if (globalPromiseType !== emptyGenericType) {
-                // if the promised type is itself a promise, get the underlying type; otherwise, fallback to the promised type
-                promisedType = getAwaitedType(promisedType);
-                return createTypeReference(globalPromiseType, [promisedType]);
+            // Check the LHS and RHS
+            // If the LHS is a declaration, just check it as a variable declaration, which will in turn check the RHS
+            // via checkRightHandSideOfForOf.
+            // If the LHS is an expression, check the LHS, as a destructuring assignment or as a reference.
+            // Then check that the RHS is assignable to it.
+            if (node.initializer.kind === 227 /* VariableDeclarationList */) {
+                checkForInOrForOfVariableDeclaration(node);
             }
-            return emptyObjectType;
-        }
-        function createPromiseReturnType(func, promisedType) {
-            var promiseType = createPromiseType(promisedType);
-            if (promiseType === emptyObjectType) {
-                error(func, ts.Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type);
-                return unknownType;
+            else {
+                var varExpr = node.initializer;
+                var iteratedType = checkRightHandSideOfForOf(node.expression, node.awaitModifier);
+                // There may be a destructuring assignment on the left side
+                if (varExpr.kind === 177 /* ArrayLiteralExpression */ || varExpr.kind === 178 /* ObjectLiteralExpression */) {
+                    // iteratedType may be undefined. In this case, we still want to check the structure of
+                    // varExpr, in particular making sure it's a valid LeftHandSideExpression. But we'd like
+                    // to short circuit the type relation checking as much as possible, so we pass the unknownType.
+                    checkDestructuringAssignment(varExpr, iteratedType || unknownType);
+                }
+                else {
+                    var leftType = checkExpression(varExpr);
+                    checkReferenceExpression(varExpr, ts.Diagnostics.The_left_hand_side_of_a_for_of_statement_must_be_a_variable_or_a_property_access);
+                    // iteratedType will be undefined if the rightType was missing properties/signatures
+                    // required to get its iteratedType (like [Symbol.iterator] or next). This may be
+                    // because we accessed properties from anyType, or it may have led to an error inside
+                    // getElementTypeOfIterable.
+                    if (iteratedType) {
+                        checkTypeAssignableTo(iteratedType, leftType, varExpr, /*headMessage*/ undefined);
+                    }
+                }
             }
-            return promiseType;
-        }
-        function getReturnTypeFromBody(func, contextualMapper) {
-            var contextualSignature = getContextualSignatureForFunctionLikeDeclaration(func);
-            if (!func.body) {
-                return unknownType;
+            checkSourceElement(node.statement);
+            if (node.locals) {
+                registerForUnusedIdentifiersCheck(node);
             }
-            var isAsync = ts.isAsyncFunctionLike(func);
-            var type;
-            if (func.body.kind !== 199 /* Block */) {
-                type = checkExpressionCached(func.body, contextualMapper);
-                if (isAsync) {
-                    // From within an async function you can return either a non-promise value or a promise. Any
-                    // Promise/A+ compatible implementation will always assimilate any foreign promise, so the
-                    // return type of the body should be unwrapped to its awaited type, which we will wrap in
-                    // the native Promise<T> type later in this function.
-                    type = checkAwaitedType(type, func, ts.Diagnostics.Return_expression_in_async_function_does_not_have_a_valid_callable_then_member);
+        }
+        function checkForInStatement(node) {
+            // Grammar checking
+            checkGrammarForInOrForOfStatement(node);
+            var rightType = checkNonNullExpression(node.expression);
+            // TypeScript 1.0 spec  (April 2014): 5.4
+            // In a 'for-in' statement of the form
+            // for (let VarDecl in Expr) Statement
+            //   VarDecl must be a variable declaration without a type annotation that declares a variable of type Any,
+            //   and Expr must be an expression of type Any, an object type, or a type parameter type.
+            if (node.initializer.kind === 227 /* VariableDeclarationList */) {
+                var variable = node.initializer.declarations[0];
+                if (variable && ts.isBindingPattern(variable.name)) {
+                    error(variable.name, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern);
                 }
+                checkForInOrForOfVariableDeclaration(node);
             }
             else {
-                var types = void 0;
-                var funcIsGenerator = !!func.asteriskToken;
-                if (funcIsGenerator) {
-                    types = checkAndAggregateYieldOperandTypes(func, contextualMapper);
-                    if (types.length === 0) {
-                        var iterableIteratorAny = createIterableIteratorType(anyType);
-                        if (compilerOptions.noImplicitAny) {
-                            error(func.asteriskToken, ts.Diagnostics.Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_type, typeToString(iterableIteratorAny));
-                        }
-                        return iterableIteratorAny;
-                    }
+                // In a 'for-in' statement of the form
+                // for (Var in Expr) Statement
+                //   Var must be an expression classified as a reference of type Any or the String primitive type,
+                //   and Expr must be an expression of type Any, an object type, or a type parameter type.
+                var varExpr = node.initializer;
+                var leftType = checkExpression(varExpr);
+                if (varExpr.kind === 177 /* ArrayLiteralExpression */ || varExpr.kind === 178 /* ObjectLiteralExpression */) {
+                    error(varExpr, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern);
                 }
-                else {
-                    types = checkAndAggregateReturnExpressionTypes(func, contextualMapper);
-                    if (!types) {
-                        // For an async function, the return type will not be never, but rather a Promise for never.
-                        return isAsync ? createPromiseReturnType(func, neverType) : neverType;
-                    }
-                    if (types.length === 0) {
-                        // For an async function, the return type will not be void, but rather a Promise for void.
-                        return isAsync ? createPromiseReturnType(func, voidType) : voidType;
-                    }
+                else if (!isTypeAssignableTo(getIndexTypeOrString(rightType), leftType)) {
+                    error(varExpr, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any);
                 }
-                // Return a union of the return expression types.
-                type = getUnionType(types, /*subtypeReduction*/ true);
-                if (funcIsGenerator) {
-                    type = createIterableIteratorType(type);
+                else {
+                    // run check only former check succeeded to avoid cascading errors
+                    checkReferenceExpression(varExpr, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_must_be_a_variable_or_a_property_access);
                 }
             }
-            if (!contextualSignature) {
-                reportErrorsFromWidening(func, type);
+            // unknownType is returned i.e. if node.expression is identifier whose name cannot be resolved
+            // in this case error about missing name is already reported - do not report extra one
+            if (!isTypeAnyOrAllConstituentTypesHaveKind(rightType, 32768 /* Object */ | 540672 /* TypeVariable */ | 16777216 /* NonPrimitive */)) {
+                error(node.expression, ts.Diagnostics.The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter);
             }
-            if (isUnitType(type) && !(contextualSignature && isLiteralContextualType(getReturnTypeOfSignature(contextualSignature)))) {
-                type = getWidenedLiteralType(type);
+            checkSourceElement(node.statement);
+            if (node.locals) {
+                registerForUnusedIdentifiersCheck(node);
             }
-            var widenedType = getWidenedType(type);
-            // From within an async function you can return either a non-promise value or a promise. Any
-            // Promise/A+ compatible implementation will always assimilate any foreign promise, so the
-            // return type of the body is awaited type of the body, wrapped in a native Promise<T> type.
-            return isAsync ? createPromiseReturnType(func, widenedType) : widenedType;
-        }
-        function checkAndAggregateYieldOperandTypes(func, contextualMapper) {
-            var aggregatedTypes = [];
-            ts.forEachYieldExpression(func.body, function (yieldExpression) {
-                var expr = yieldExpression.expression;
-                if (expr) {
-                    var type = checkExpressionCached(expr, contextualMapper);
-                    if (yieldExpression.asteriskToken) {
-                        // A yield* expression effectively yields everything that its operand yields
-                        type = checkElementTypeOfIterable(type, yieldExpression.expression);
-                    }
-                    if (!ts.contains(aggregatedTypes, type)) {
-                        aggregatedTypes.push(type);
-                    }
-                }
-            });
-            return aggregatedTypes;
         }
-        function isExhaustiveSwitchStatement(node) {
-            if (!node.possiblyExhaustive) {
-                return false;
-            }
-            var type = checkExpression(node.expression);
-            if (!isLiteralType(type)) {
-                return false;
-            }
-            var switchTypes = getSwitchClauseTypes(node);
-            if (!switchTypes.length) {
-                return false;
+        function checkForInOrForOfVariableDeclaration(iterationStatement) {
+            var variableDeclarationList = iterationStatement.initializer;
+            // checkGrammarForInOrForOfStatement will check that there is exactly one declaration.
+            if (variableDeclarationList.declarations.length >= 1) {
+                var decl = variableDeclarationList.declarations[0];
+                checkVariableDeclaration(decl);
             }
-            return eachTypeContainedIn(type, switchTypes);
         }
-        function functionHasImplicitReturn(func) {
-            if (!(func.flags & 128 /* HasImplicitReturn */)) {
-                return false;
-            }
-            var lastStatement = ts.lastOrUndefined(func.body.statements);
-            if (lastStatement && lastStatement.kind === 213 /* SwitchStatement */ && isExhaustiveSwitchStatement(lastStatement)) {
-                return false;
+        function checkRightHandSideOfForOf(rhsExpression, awaitModifier) {
+            var expressionType = checkNonNullExpression(rhsExpression);
+            return checkIteratedTypeOrElementType(expressionType, rhsExpression, /*allowStringInput*/ true, awaitModifier !== undefined);
+        }
+        function checkIteratedTypeOrElementType(inputType, errorNode, allowStringInput, allowAsyncIterables) {
+            if (isTypeAny(inputType)) {
+                return inputType;
             }
-            return true;
+            return getIteratedTypeOrElementType(inputType, errorNode, allowStringInput, allowAsyncIterables, /*checkAssignability*/ true) || anyType;
         }
-        function checkAndAggregateReturnExpressionTypes(func, contextualMapper) {
-            var isAsync = ts.isAsyncFunctionLike(func);
-            var aggregatedTypes = [];
-            var hasReturnWithNoExpression = functionHasImplicitReturn(func);
-            var hasReturnOfTypeNever = false;
-            ts.forEachReturnStatement(func.body, function (returnStatement) {
-                var expr = returnStatement.expression;
-                if (expr) {
-                    var type = checkExpressionCached(expr, contextualMapper);
-                    if (isAsync) {
-                        // From within an async function you can return either a non-promise value or a promise. Any
-                        // Promise/A+ compatible implementation will always assimilate any foreign promise, so the
-                        // return type of the body should be unwrapped to its awaited type, which should be wrapped in
-                        // the native Promise<T> type by the caller.
-                        type = checkAwaitedType(type, func, ts.Diagnostics.Return_expression_in_async_function_does_not_have_a_valid_callable_then_member);
+        /**
+         * When consuming an iterable type in a for..of, spread, or iterator destructuring assignment
+         * we want to get the iterated type of an iterable for ES2015 or later, or the iterated type
+         * of a iterable (if defined globally) or element type of an array like for ES2015 or earlier.
+         */
+        function getIteratedTypeOrElementType(inputType, errorNode, allowStringInput, allowAsyncIterables, checkAssignability) {
+            var uplevelIteration = languageVersion >= 2 /* ES2015 */;
+            var downlevelIteration = !uplevelIteration && compilerOptions.downlevelIteration;
+            // Get the iterated type of an `Iterable<T>` or `IterableIterator<T>` only in ES2015
+            // or higher, when inside of an async generator or for-await-if, or when
+            // downlevelIteration is requested.
+            if (uplevelIteration || downlevelIteration || allowAsyncIterables) {
+                // We only report errors for an invalid iterable type in ES2015 or higher.
+                var iteratedType = getIteratedTypeOfIterable(inputType, uplevelIteration ? errorNode : undefined, allowAsyncIterables, /*allowSyncIterables*/ true, checkAssignability);
+                if (iteratedType || uplevelIteration) {
+                    return iteratedType;
+                }
+            }
+            var arrayType = inputType;
+            var reportedError = false;
+            var hasStringConstituent = false;
+            // If strings are permitted, remove any string-like constituents from the array type.
+            // This allows us to find other non-string element types from an array unioned with
+            // a string.
+            if (allowStringInput) {
+                if (arrayType.flags & 65536 /* Union */) {
+                    // After we remove all types that are StringLike, we will know if there was a string constituent
+                    // based on whether the result of filter is a new array.
+                    var arrayTypes = inputType.types;
+                    var filteredTypes = ts.filter(arrayTypes, function (t) { return !(t.flags & 262178 /* StringLike */); });
+                    if (filteredTypes !== arrayTypes) {
+                        arrayType = getUnionType(filteredTypes, /*subtypeReduction*/ true);
                     }
-                    if (type.flags & 8192 /* Never */) {
-                        hasReturnOfTypeNever = true;
+                }
+                else if (arrayType.flags & 262178 /* StringLike */) {
+                    arrayType = neverType;
+                }
+                hasStringConstituent = arrayType !== inputType;
+                if (hasStringConstituent) {
+                    if (languageVersion < 1 /* ES5 */) {
+                        if (errorNode) {
+                            error(errorNode, ts.Diagnostics.Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher);
+                            reportedError = true;
+                        }
                     }
-                    else if (!ts.contains(aggregatedTypes, type)) {
-                        aggregatedTypes.push(type);
+                    // Now that we've removed all the StringLike types, if no constituents remain, then the entire
+                    // arrayOrStringType was a string.
+                    if (arrayType.flags & 8192 /* Never */) {
+                        return stringType;
                     }
                 }
-                else {
-                    hasReturnWithNoExpression = true;
+            }
+            if (!isArrayLikeType(arrayType)) {
+                if (errorNode && !reportedError) {
+                    // Which error we report depends on whether we allow strings or if there was a
+                    // string constituent. For example, if the input type is number | string, we
+                    // want to say that number is not an array type. But if the input was just
+                    // number and string input is allowed, we want to say that number is not an
+                    // array type or a string type.
+                    var diagnostic = !allowStringInput || hasStringConstituent
+                        ? downlevelIteration
+                            ? ts.Diagnostics.Type_0_is_not_an_array_type_or_does_not_have_a_Symbol_iterator_method_that_returns_an_iterator
+                            : ts.Diagnostics.Type_0_is_not_an_array_type
+                        : downlevelIteration
+                            ? ts.Diagnostics.Type_0_is_not_an_array_type_or_a_string_type_or_does_not_have_a_Symbol_iterator_method_that_returns_an_iterator
+                            : ts.Diagnostics.Type_0_is_not_an_array_type_or_a_string_type;
+                    error(errorNode, diagnostic, typeToString(arrayType));
                 }
-            });
-            if (aggregatedTypes.length === 0 && !hasReturnWithNoExpression && (hasReturnOfTypeNever ||
-                func.kind === 179 /* FunctionExpression */ || func.kind === 180 /* ArrowFunction */)) {
-                return undefined;
+                return hasStringConstituent ? stringType : undefined;
             }
-            if (strictNullChecks && aggregatedTypes.length && hasReturnWithNoExpression) {
-                if (!ts.contains(aggregatedTypes, undefinedType)) {
-                    aggregatedTypes.push(undefinedType);
+            var arrayElementType = getIndexTypeOfType(arrayType, 1 /* Number */);
+            if (hasStringConstituent && arrayElementType) {
+                // This is just an optimization for the case where arrayOrStringType is string | string[]
+                if (arrayElementType.flags & 262178 /* StringLike */) {
+                    return stringType;
                 }
+                return getUnionType([arrayElementType, stringType], /*subtypeReduction*/ true);
             }
-            return aggregatedTypes;
+            return arrayElementType;
         }
         /**
-         * TypeScript Specification 1.0 (6.3) - July 2014
-         *   An explicitly typed function whose return type isn't the Void type,
-         *   the Any type, or a union type containing the Void or Any type as a constituent
-         *   must have at least one return statement somewhere in its body.
-         *   An exception to this rule is if the function implementation consists of a single 'throw' statement.
+         * We want to treat type as an iterable, and get the type it is an iterable of. The iterable
+         * must have the following structure (annotated with the names of the variables below):
          *
-         * @param returnType - return type of the function, can be undefined if return type is not explicitly specified
+         *     { // iterable
+         *         [Symbol.iterator]: { // iteratorMethod
+         *             (): Iterator<T>
+         *         }
+         *     }
+         *
+         * For an async iterable, we expect the following structure:
+         *
+         *     { // iterable
+         *         [Symbol.asyncIterator]: { // iteratorMethod
+         *             (): AsyncIterator<T>
+         *         }
+         *     }
+         *
+         * T is the type we are after. At every level that involves analyzing return types
+         * of signatures, we union the return types of all the signatures.
+         *
+         * Another thing to note is that at any step of this process, we could run into a dead end,
+         * meaning either the property is missing, or we run into the anyType. If either of these things
+         * happens, we return undefined to signal that we could not find the iterated type. If a property
+         * is missing, and the previous step did not result in 'any', then we also give an error if the
+         * caller requested it. Then the caller can decide what to do in the case where there is no iterated
+         * type. This is different from returning anyType, because that would signify that we have matched the
+         * whole pattern and that T (above) is 'any'.
+         *
+         * For a **for-of** statement, `yield*` (in a normal generator), spread, array
+         * destructuring, or normal generator we will only ever look for a `[Symbol.iterator]()`
+         * method.
+         *
+         * For an async generator we will only ever look at the `[Symbol.asyncIterator]()` method.
+         *
+         * For a **for-await-of** statement or a `yield*` in an async generator we will look for
+         * the `[Symbol.asyncIterator]()` method first, and then the `[Symbol.iterator]()` method.
          */
-        function checkAllCodePathsInNonVoidFunctionReturnOrThrow(func, returnType) {
-            if (!produceDiagnostics) {
-                return;
-            }
-            // Functions with with an explicitly specified 'void' or 'any' return type don't need any return expressions.
-            if (returnType && maybeTypeOfKind(returnType, 1 /* Any */ | 1024 /* Void */)) {
-                return;
-            }
-            // If all we have is a function signature, or an arrow function with an expression body, then there is nothing to check.
-            // also if HasImplicitReturn flag is not set this means that all codepaths in function body end with return or throw
-            if (ts.nodeIsMissing(func.body) || func.body.kind !== 199 /* Block */ || !functionHasImplicitReturn(func)) {
-                return;
-            }
-            var hasExplicitReturn = func.flags & 256 /* HasExplicitReturn */;
-            if (returnType && returnType.flags & 8192 /* Never */) {
-                error(func.type, ts.Diagnostics.A_function_returning_never_cannot_have_a_reachable_end_point);
-            }
-            else if (returnType && !hasExplicitReturn) {
-                // minimal check: function has syntactic return type annotation and no explicit return statements in the body
-                // this function does not conform to the specification.
-                // NOTE: having returnType !== undefined is a precondition for entering this branch so func.type will always be present
-                error(func.type, ts.Diagnostics.A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value);
-            }
-            else if (returnType && strictNullChecks && !isTypeAssignableTo(undefinedType, returnType)) {
-                error(func.type, ts.Diagnostics.Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined);
+        function getIteratedTypeOfIterable(type, errorNode, allowAsyncIterables, allowSyncIterables, checkAssignability) {
+            if (isTypeAny(type)) {
+                return undefined;
             }
-            else if (compilerOptions.noImplicitReturns) {
-                if (!returnType) {
-                    // If return type annotation is omitted check if function has any explicit return statements.
-                    // If it does not have any - its inferred return type is void - don't do any checks.
-                    // Otherwise get inferred return type from function body and report error only if it is not void / anytype
-                    if (!hasExplicitReturn) {
-                        return;
+            return mapType(type, getIteratedType);
+            function getIteratedType(type) {
+                var typeAsIterable = type;
+                if (allowAsyncIterables) {
+                    if (typeAsIterable.iteratedTypeOfAsyncIterable) {
+                        return typeAsIterable.iteratedTypeOfAsyncIterable;
                     }
-                    var inferredReturnType = getReturnTypeOfSignature(getSignatureFromDeclaration(func));
-                    if (isUnwrappedReturnTypeVoidOrAny(func, inferredReturnType)) {
-                        return;
+                    // As an optimization, if the type is an instantiation of the global `AsyncIterable<T>`
+                    // or the global `AsyncIterableIterator<T>` then just grab its type argument.
+                    if (isReferenceToType(type, getGlobalAsyncIterableType(/*reportErrors*/ false)) ||
+                        isReferenceToType(type, getGlobalAsyncIterableIteratorType(/*reportErrors*/ false))) {
+                        return typeAsIterable.iteratedTypeOfAsyncIterable = type.typeArguments[0];
                     }
                 }
-                error(func.type || func, ts.Diagnostics.Not_all_code_paths_return_a_value);
-            }
-        }
-        function checkFunctionExpressionOrObjectLiteralMethod(node, contextualMapper) {
-            ts.Debug.assert(node.kind !== 147 /* MethodDeclaration */ || ts.isObjectLiteralMethod(node));
-            // Grammar checking
-            var hasGrammarError = checkGrammarFunctionLikeDeclaration(node);
-            if (!hasGrammarError && node.kind === 179 /* FunctionExpression */) {
-                checkGrammarForGenerator(node);
-            }
-            // The identityMapper object is used to indicate that function expressions are wildcards
-            if (contextualMapper === identityMapper && isContextSensitive(node)) {
-                checkNodeDeferred(node);
-                return anyFunctionType;
-            }
-            var links = getNodeLinks(node);
-            var type = getTypeOfSymbol(node.symbol);
-            var contextSensitive = isContextSensitive(node);
-            var mightFixTypeParameters = contextSensitive && isInferentialContext(contextualMapper);
-            // Check if function expression is contextually typed and assign parameter types if so.
-            // See the comment in assignTypeToParameterAndFixTypeParameters to understand why we need to
-            // check mightFixTypeParameters.
-            if (mightFixTypeParameters || !(links.flags & 1024 /* ContextChecked */)) {
-                var contextualSignature = getContextualSignature(node);
-                // If a type check is started at a function expression that is an argument of a function call, obtaining the
-                // contextual type may recursively get back to here during overload resolution of the call. If so, we will have
-                // already assigned contextual types.
-                var contextChecked = !!(links.flags & 1024 /* ContextChecked */);
-                if (mightFixTypeParameters || !contextChecked) {
-                    links.flags |= 1024 /* ContextChecked */;
-                    if (contextualSignature) {
-                        var signature = getSignaturesOfType(type, 0 /* Call */)[0];
-                        if (contextSensitive) {
-                            assignContextualParameterTypes(signature, contextualSignature, contextualMapper || identityMapper);
-                        }
-                        if (mightFixTypeParameters || !node.type && !signature.resolvedReturnType) {
-                            var returnType = getReturnTypeFromBody(node, contextualMapper);
-                            if (!signature.resolvedReturnType) {
-                                signature.resolvedReturnType = returnType;
-                            }
-                        }
+                if (allowSyncIterables) {
+                    if (typeAsIterable.iteratedTypeOfIterable) {
+                        return typeAsIterable.iteratedTypeOfIterable;
                     }
-                    if (!contextChecked) {
-                        checkSignatureDeclaration(node);
-                        checkNodeDeferred(node);
+                    // As an optimization, if the type is an instantiation of the global `Iterable<T>` or
+                    // `IterableIterator<T>` then just grab its type argument.
+                    if (isReferenceToType(type, getGlobalIterableType(/*reportErrors*/ false)) ||
+                        isReferenceToType(type, getGlobalIterableIteratorType(/*reportErrors*/ false))) {
+                        return typeAsIterable.iteratedTypeOfIterable = type.typeArguments[0];
                     }
                 }
-            }
-            if (produceDiagnostics && node.kind !== 147 /* MethodDeclaration */ && node.kind !== 146 /* MethodSignature */) {
-                checkCollisionWithCapturedSuperVariable(node, node.name);
-                checkCollisionWithCapturedThisVariable(node, node.name);
-            }
-            return type;
-        }
-        function checkFunctionExpressionOrObjectLiteralMethodDeferred(node) {
-            ts.Debug.assert(node.kind !== 147 /* MethodDeclaration */ || ts.isObjectLiteralMethod(node));
-            var isAsync = ts.isAsyncFunctionLike(node);
-            var returnOrPromisedType = node.type && (isAsync ? checkAsyncFunctionReturnType(node) : getTypeFromTypeNode(node.type));
-            if (!node.asteriskToken) {
-                // return is not necessary in the body of generators
-                checkAllCodePathsInNonVoidFunctionReturnOrThrow(node, returnOrPromisedType);
-            }
-            if (node.body) {
-                if (!node.type) {
-                    // There are some checks that are only performed in getReturnTypeFromBody, that may produce errors
-                    // we need. An example is the noImplicitAny errors resulting from widening the return expression
-                    // of a function. Because checking of function expression bodies is deferred, there was never an
-                    // appropriate time to do this during the main walk of the file (see the comment at the top of
-                    // checkFunctionExpressionBodies). So it must be done now.
-                    getReturnTypeOfSignature(getSignatureFromDeclaration(node));
-                }
-                if (node.body.kind === 199 /* Block */) {
-                    checkSourceElement(node.body);
+                var asyncMethodType = allowAsyncIterables && getTypeOfPropertyOfType(type, ts.getPropertyNameForKnownSymbolName("asyncIterator"));
+                var methodType = asyncMethodType || (allowSyncIterables && getTypeOfPropertyOfType(type, ts.getPropertyNameForKnownSymbolName("iterator")));
+                if (isTypeAny(methodType)) {
+                    return undefined;
                 }
-                else {
-                    // From within an async function you can return either a non-promise value or a promise. Any
-                    // Promise/A+ compatible implementation will always assimilate any foreign promise, so we
-                    // should not be checking assignability of a promise to the return type. Instead, we need to
-                    // check assignability of the awaited type of the expression body against the promised type of
-                    // its return type annotation.
-                    var exprType = checkExpression(node.body);
-                    if (returnOrPromisedType) {
-                        if (isAsync) {
-                            var awaitedType = checkAwaitedType(exprType, node.body, ts.Diagnostics.Expression_body_for_async_arrow_function_does_not_have_a_valid_callable_then_member);
-                            checkTypeAssignableTo(awaitedType, returnOrPromisedType, node.body);
-                        }
-                        else {
-                            checkTypeAssignableTo(exprType, returnOrPromisedType, node.body);
-                        }
+                var signatures = methodType && getSignaturesOfType(methodType, 0 /* Call */);
+                if (!ts.some(signatures)) {
+                    if (errorNode) {
+                        error(errorNode, allowAsyncIterables
+                            ? ts.Diagnostics.Type_must_have_a_Symbol_asyncIterator_method_that_returns_an_async_iterator
+                            : ts.Diagnostics.Type_must_have_a_Symbol_iterator_method_that_returns_an_iterator);
+                        // only report on the first error
+                        errorNode = undefined;
                     }
+                    return undefined;
                 }
-                registerForUnusedIdentifiersCheck(node);
+                var returnType = getUnionType(ts.map(signatures, getReturnTypeOfSignature), /*subtypeReduction*/ true);
+                var iteratedType = getIteratedTypeOfIterator(returnType, errorNode, /*isAsyncIterator*/ !!asyncMethodType);
+                if (checkAssignability && errorNode && iteratedType) {
+                    // If `checkAssignability` was specified, we were called from
+                    // `checkIteratedTypeOrElementType`. As such, we need to validate that
+                    // the type passed in is actually an Iterable.
+                    checkTypeAssignableTo(type, asyncMethodType
+                        ? createAsyncIterableType(iteratedType)
+                        : createIterableType(iteratedType), errorNode);
+                }
+                return asyncMethodType
+                    ? typeAsIterable.iteratedTypeOfAsyncIterable = iteratedType
+                    : typeAsIterable.iteratedTypeOfIterable = iteratedType;
             }
         }
-        function checkArithmeticOperandType(operand, type, diagnostic) {
-            if (!isTypeAnyOrAllConstituentTypesHaveKind(type, 340 /* NumberLike */)) {
-                error(operand, diagnostic);
-                return false;
+        /**
+         * This function has very similar logic as getIteratedTypeOfIterable, except that it operates on
+         * Iterators instead of Iterables. Here is the structure:
+         *
+         *  { // iterator
+         *      next: { // nextMethod
+         *          (): { // nextResult
+         *              value: T // nextValue
+         *          }
+         *      }
+         *  }
+         *
+         * For an async iterator, we expect the following structure:
+         *
+         *  { // iterator
+         *      next: { // nextMethod
+         *          (): PromiseLike<{ // nextResult
+         *              value: T // nextValue
+         *          }>
+         *      }
+         *  }
+         */
+        function getIteratedTypeOfIterator(type, errorNode, isAsyncIterator) {
+            if (isTypeAny(type)) {
+                return undefined;
             }
-            return true;
-        }
-        function isReadonlySymbol(symbol) {
-            // The following symbols are considered read-only:
-            // Properties with a 'readonly' modifier
-            // Variables declared with 'const'
-            // Get accessors without matching set accessors
-            // Enum members
-            // Unions and intersections of the above (unions and intersections eagerly set isReadonly on creation)
-            return symbol.isReadonly ||
-                symbol.flags & 4 /* Property */ && (getDeclarationModifierFlagsFromSymbol(symbol) & 64 /* Readonly */) !== 0 ||
-                symbol.flags & 3 /* Variable */ && (getDeclarationNodeFlagsFromSymbol(symbol) & 2 /* Const */) !== 0 ||
-                symbol.flags & 98304 /* Accessor */ && !(symbol.flags & 65536 /* SetAccessor */) ||
-                (symbol.flags & 8 /* EnumMember */) !== 0;
-        }
-        function isReferenceToReadonlyEntity(expr, symbol) {
-            if (isReadonlySymbol(symbol)) {
-                // Allow assignments to readonly properties within constructors of the same class declaration.
-                if (symbol.flags & 4 /* Property */ &&
-                    (expr.kind === 172 /* PropertyAccessExpression */ || expr.kind === 173 /* ElementAccessExpression */) &&
-                    expr.expression.kind === 97 /* ThisKeyword */) {
-                    // Look for if this is the constructor for the class that `symbol` is a property of.
-                    var func = ts.getContainingFunction(expr);
-                    if (!(func && func.kind === 148 /* Constructor */))
-                        return true;
-                    // If func.parent is a class and symbol is a (readonly) property of that class, or
-                    // if func is a constructor and symbol is a (readonly) parameter property declared in it,
-                    // then symbol is writeable here.
-                    return !(func.parent === symbol.valueDeclaration.parent || func === symbol.valueDeclaration.parent);
-                }
-                return true;
+            var typeAsIterator = type;
+            if (isAsyncIterator ? typeAsIterator.iteratedTypeOfAsyncIterator : typeAsIterator.iteratedTypeOfIterator) {
+                return isAsyncIterator ? typeAsIterator.iteratedTypeOfAsyncIterator : typeAsIterator.iteratedTypeOfIterator;
+            }
+            // As an optimization, if the type is an instantiation of the global `Iterator<T>` (for
+            // a non-async iterator) or the global `AsyncIterator<T>` (for an async-iterator) then
+            // just grab its type argument.
+            var getIteratorType = isAsyncIterator ? getGlobalAsyncIteratorType : getGlobalIteratorType;
+            if (isReferenceToType(type, getIteratorType(/*reportErrors*/ false))) {
+                return isAsyncIterator
+                    ? typeAsIterator.iteratedTypeOfAsyncIterator = type.typeArguments[0]
+                    : typeAsIterator.iteratedTypeOfIterator = type.typeArguments[0];
+            }
+            // Both async and non-async iterators must have a `next` method.
+            var nextMethod = getTypeOfPropertyOfType(type, "next");
+            if (isTypeAny(nextMethod)) {
+                return undefined;
             }
-            return false;
-        }
-        function isReferenceThroughNamespaceImport(expr) {
-            if (expr.kind === 172 /* PropertyAccessExpression */ || expr.kind === 173 /* ElementAccessExpression */) {
-                var node = skipParenthesizedNodes(expr.expression);
-                if (node.kind === 69 /* Identifier */) {
-                    var symbol = getNodeLinks(node).resolvedSymbol;
-                    if (symbol.flags & 8388608 /* Alias */) {
-                        var declaration = getDeclarationOfAliasSymbol(symbol);
-                        return declaration && declaration.kind === 232 /* NamespaceImport */;
-                    }
+            var nextMethodSignatures = nextMethod ? getSignaturesOfType(nextMethod, 0 /* Call */) : emptyArray;
+            if (nextMethodSignatures.length === 0) {
+                if (errorNode) {
+                    error(errorNode, isAsyncIterator
+                        ? ts.Diagnostics.An_async_iterator_must_have_a_next_method
+                        : ts.Diagnostics.An_iterator_must_have_a_next_method);
                 }
+                return undefined;
             }
-            return false;
-        }
-        function checkReferenceExpression(expr, invalidReferenceMessage, constantVariableMessage) {
-            // References are combinations of identifiers, parentheses, and property accesses.
-            var node = skipParenthesizedNodes(expr);
-            if (node.kind !== 69 /* Identifier */ && node.kind !== 172 /* PropertyAccessExpression */ && node.kind !== 173 /* ElementAccessExpression */) {
-                error(expr, invalidReferenceMessage);
-                return false;
+            var nextResult = getUnionType(ts.map(nextMethodSignatures, getReturnTypeOfSignature), /*subtypeReduction*/ true);
+            if (isTypeAny(nextResult)) {
+                return undefined;
             }
-            // Because we get the symbol from the resolvedSymbol property, it might be of kind
-            // SymbolFlags.ExportValue. In this case it is necessary to get the actual export
-            // symbol, which will have the correct flags set on it.
-            var links = getNodeLinks(node);
-            var symbol = getExportSymbolOfValueSymbolIfExported(links.resolvedSymbol);
-            if (symbol) {
-                if (symbol !== unknownSymbol && symbol !== argumentsSymbol) {
-                    // Only variables (and not functions, classes, namespaces, enum objects, or enum members)
-                    // are considered references when referenced using a simple identifier.
-                    if (node.kind === 69 /* Identifier */ && !(symbol.flags & 3 /* Variable */)) {
-                        error(expr, invalidReferenceMessage);
-                        return false;
-                    }
-                    if (isReferenceToReadonlyEntity(node, symbol) || isReferenceThroughNamespaceImport(node)) {
-                        error(expr, constantVariableMessage);
-                        return false;
-                    }
+            // For an async iterator, we must get the awaited type of the return type.
+            if (isAsyncIterator) {
+                nextResult = getAwaitedTypeOfPromise(nextResult, errorNode, ts.Diagnostics.The_type_returned_by_the_next_method_of_an_async_iterator_must_be_a_promise_for_a_type_with_a_value_property);
+                if (isTypeAny(nextResult)) {
+                    return undefined;
                 }
             }
-            else if (node.kind === 173 /* ElementAccessExpression */) {
-                if (links.resolvedIndexInfo && links.resolvedIndexInfo.isReadonly) {
-                    error(expr, constantVariableMessage);
-                    return false;
+            var nextValue = nextResult && getTypeOfPropertyOfType(nextResult, "value");
+            if (!nextValue) {
+                if (errorNode) {
+                    error(errorNode, isAsyncIterator
+                        ? ts.Diagnostics.The_type_returned_by_the_next_method_of_an_async_iterator_must_be_a_promise_for_a_type_with_a_value_property
+                        : ts.Diagnostics.The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property);
                 }
+                return undefined;
             }
-            return true;
+            return isAsyncIterator
+                ? typeAsIterator.iteratedTypeOfAsyncIterator = nextValue
+                : typeAsIterator.iteratedTypeOfIterator = nextValue;
         }
-        function checkDeleteExpression(node) {
-            checkExpression(node.expression);
-            return booleanType;
+        /**
+         * A generator may have a return type of `Iterator<T>`, `Iterable<T>`, or
+         * `IterableIterator<T>`. An async generator may have a return type of `AsyncIterator<T>`,
+         * `AsyncIterable<T>`, or `AsyncIterableIterator<T>`. This function can be used to extract
+         * the iterated type from this return type for contextual typing and verifying signatures.
+         */
+        function getIteratedTypeOfGenerator(returnType, isAsyncGenerator) {
+            if (isTypeAny(returnType)) {
+                return undefined;
+            }
+            return getIteratedTypeOfIterable(returnType, /*errorNode*/ undefined, /*allowAsyncIterables*/ isAsyncGenerator, /*allowSyncIterables*/ !isAsyncGenerator, /*checkAssignability*/ false)
+                || getIteratedTypeOfIterator(returnType, /*errorNode*/ undefined, isAsyncGenerator);
         }
-        function checkTypeOfExpression(node) {
-            checkExpression(node.expression);
-            return stringType;
+        function checkBreakOrContinueStatement(node) {
+            // Grammar checking
+            checkGrammarStatementInAmbientContext(node) || checkGrammarBreakOrContinueStatement(node);
+            // TODO: Check that target label is valid
         }
-        function checkVoidExpression(node) {
-            checkExpression(node.expression);
-            return undefinedWideningType;
+        function isGetAccessorWithAnnotatedSetAccessor(node) {
+            return node.kind === 153 /* GetAccessor */
+                && ts.getEffectiveSetAccessorTypeAnnotationNode(ts.getDeclarationOfKind(node.symbol, 154 /* SetAccessor */)) !== undefined;
         }
-        function checkAwaitExpression(node) {
+        function isUnwrappedReturnTypeVoidOrAny(func, returnType) {
+            var unwrappedReturnType = (ts.getFunctionFlags(func) & 3 /* AsyncGenerator */) === 2 /* Async */
+                ? getPromisedTypeOfPromise(returnType) // Async function
+                : returnType; // AsyncGenerator function, Generator function, or normal function
+            return unwrappedReturnType && maybeTypeOfKind(unwrappedReturnType, 1024 /* Void */ | 1 /* Any */);
+        }
+        function checkReturnStatement(node) {
             // Grammar checking
-            if (produceDiagnostics) {
-                if (!(node.flags & 262144 /* AwaitContext */)) {
-                    grammarErrorOnFirstToken(node, ts.Diagnostics.await_expression_is_only_allowed_within_an_async_function);
-                }
-                if (isInParameterInitializerBeforeContainingFunction(node)) {
-                    error(node, ts.Diagnostics.await_expressions_cannot_be_used_in_a_parameter_initializer);
+            if (!checkGrammarStatementInAmbientContext(node)) {
+                var functionBlock = ts.getContainingFunction(node);
+                if (!functionBlock) {
+                    grammarErrorOnFirstToken(node, ts.Diagnostics.A_return_statement_can_only_be_used_within_a_function_body);
                 }
             }
-            var operandType = checkExpression(node.expression);
-            return checkAwaitedType(operandType, node);
-        }
-        function checkPrefixUnaryExpression(node) {
-            var operandType = checkExpression(node.operand);
-            if (operandType === silentNeverType) {
-                return silentNeverType;
-            }
-            if (node.operator === 36 /* MinusToken */ && node.operand.kind === 8 /* NumericLiteral */) {
-                return getFreshTypeOfLiteralType(getLiteralTypeForText(64 /* NumberLiteral */, "" + -node.operand.text));
-            }
-            switch (node.operator) {
-                case 35 /* PlusToken */:
-                case 36 /* MinusToken */:
-                case 50 /* TildeToken */:
-                    if (maybeTypeOfKind(operandType, 512 /* ESSymbol */)) {
-                        error(node.operand, ts.Diagnostics.The_0_operator_cannot_be_applied_to_type_symbol, ts.tokenToString(node.operator));
+            var func = ts.getContainingFunction(node);
+            if (func) {
+                var signature = getSignatureFromDeclaration(func);
+                var returnType = getReturnTypeOfSignature(signature);
+                if (strictNullChecks || node.expression || returnType.flags & 8192 /* Never */) {
+                    var exprType = node.expression ? checkExpressionCached(node.expression) : undefinedType;
+                    var functionFlags = ts.getFunctionFlags(func);
+                    if (functionFlags & 1 /* Generator */) {
+                        // A generator does not need its return expressions checked against its return type.
+                        // Instead, the yield expressions are checked against the element type.
+                        // TODO: Check return expressions of generators when return type tracking is added
+                        // for generators.
+                        return;
                     }
-                    return numberType;
-                case 49 /* ExclamationToken */:
-                    var facts = getTypeFacts(operandType) & (1048576 /* Truthy */ | 2097152 /* Falsy */);
-                    return facts === 1048576 /* Truthy */ ? falseType :
-                        facts === 2097152 /* Falsy */ ? trueType :
-                            booleanType;
-                case 41 /* PlusPlusToken */:
-                case 42 /* MinusMinusToken */:
-                    var ok = checkArithmeticOperandType(node.operand, getNonNullableType(operandType), ts.Diagnostics.An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type);
-                    if (ok) {
-                        // run check only if former checks succeeded to avoid reporting cascading errors
-                        checkReferenceExpression(node.operand, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property);
+                    if (func.kind === 154 /* SetAccessor */) {
+                        if (node.expression) {
+                            error(node, ts.Diagnostics.Setters_cannot_return_a_value);
+                        }
                     }
-                    return numberType;
-            }
-            return unknownType;
-        }
-        function checkPostfixUnaryExpression(node) {
-            var operandType = checkExpression(node.operand);
-            if (operandType === silentNeverType) {
-                return silentNeverType;
-            }
-            var ok = checkArithmeticOperandType(node.operand, getNonNullableType(operandType), ts.Diagnostics.An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type);
-            if (ok) {
-                // run check only if former checks succeeded to avoid reporting cascading errors
-                checkReferenceExpression(node.operand, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property);
-            }
-            return numberType;
-        }
-        // Return true if type might be of the given kind. A union or intersection type might be of a given
-        // kind if at least one constituent type is of the given kind.
-        function maybeTypeOfKind(type, kind) {
-            if (type.flags & kind) {
-                return true;
-            }
-            if (type.flags & 1572864 /* UnionOrIntersection */) {
-                var types = type.types;
-                for (var _i = 0, types_14 = types; _i < types_14.length; _i++) {
-                    var t = types_14[_i];
-                    if (maybeTypeOfKind(t, kind)) {
-                        return true;
+                    else if (func.kind === 152 /* Constructor */) {
+                        if (node.expression && !checkTypeAssignableTo(exprType, returnType, node)) {
+                            error(node, ts.Diagnostics.Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class);
+                        }
                     }
-                }
-            }
-            return false;
-        }
-        // Return true if type is of the given kind. A union type is of a given kind if all constituent types
-        // are of the given kind. An intersection type is of a given kind if at least one constituent type is
-        // of the given kind.
-        function isTypeOfKind(type, kind) {
-            if (type.flags & kind) {
-                return true;
-            }
-            if (type.flags & 524288 /* Union */) {
-                var types = type.types;
-                for (var _i = 0, types_15 = types; _i < types_15.length; _i++) {
-                    var t = types_15[_i];
-                    if (!isTypeOfKind(t, kind)) {
-                        return false;
+                    else if (ts.getEffectiveReturnTypeNode(func) || isGetAccessorWithAnnotatedSetAccessor(func)) {
+                        if (functionFlags & 2 /* Async */) {
+                            var promisedType = getPromisedTypeOfPromise(returnType);
+                            var awaitedType = checkAwaitedType(exprType, node, ts.Diagnostics.The_return_type_of_an_async_function_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member);
+                            if (promisedType) {
+                                // If the function has a return type, but promisedType is
+                                // undefined, an error will be reported in checkAsyncFunctionReturnType
+                                // so we don't need to report one here.
+                                checkTypeAssignableTo(awaitedType, promisedType, node);
+                            }
+                        }
+                        else {
+                            checkTypeAssignableTo(exprType, returnType, node);
+                        }
                     }
                 }
-                return true;
-            }
-            if (type.flags & 1048576 /* Intersection */) {
-                var types = type.types;
-                for (var _a = 0, types_16 = types; _a < types_16.length; _a++) {
-                    var t = types_16[_a];
-                    if (isTypeOfKind(t, kind)) {
-                        return true;
-                    }
+                else if (func.kind !== 152 /* Constructor */ && compilerOptions.noImplicitReturns && !isUnwrappedReturnTypeVoidOrAny(func, returnType)) {
+                    // The function has a return type, but the return statement doesn't have an expression.
+                    error(node, ts.Diagnostics.Not_all_code_paths_return_a_value);
                 }
             }
-            return false;
-        }
-        function isConstEnumObjectType(type) {
-            return type.flags & (2588672 /* ObjectType */ | 2097152 /* Anonymous */) && type.symbol && isConstEnumSymbol(type.symbol);
-        }
-        function isConstEnumSymbol(symbol) {
-            return (symbol.flags & 128 /* ConstEnum */) !== 0;
-        }
-        function checkInstanceOfExpression(left, right, leftType, rightType) {
-            if (leftType === silentNeverType || rightType === silentNeverType) {
-                return silentNeverType;
-            }
-            // TypeScript 1.0 spec (April 2014): 4.15.4
-            // The instanceof operator requires the left operand to be of type Any, an object type, or a type parameter type,
-            // and the right operand to be of type Any or a subtype of the 'Function' interface type.
-            // The result is always of the Boolean primitive type.
-            // NOTE: do not raise error if leftType is unknown as related error was already reported
-            if (isTypeOfKind(leftType, 8190 /* Primitive */)) {
-                error(left, ts.Diagnostics.The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_parameter);
-            }
-            // NOTE: do not raise error if right is unknown as related error was already reported
-            if (!(isTypeAny(rightType) || isTypeSubtypeOf(rightType, globalFunctionType))) {
-                error(right, ts.Diagnostics.The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_Function_interface_type);
-            }
-            return booleanType;
         }
-        function checkInExpression(left, right, leftType, rightType) {
-            if (leftType === silentNeverType || rightType === silentNeverType) {
-                return silentNeverType;
-            }
-            // TypeScript 1.0 spec (April 2014): 4.15.5
-            // The in operator requires the left operand to be of type Any, the String primitive type, or the Number primitive type,
-            // and the right operand to be of type Any, an object type, or a type parameter type.
-            // The result is always of the Boolean primitive type.
-            if (!isTypeAnyOrAllConstituentTypesHaveKind(leftType, 34 /* StringLike */ | 340 /* NumberLike */ | 512 /* ESSymbol */)) {
-                error(left, ts.Diagnostics.The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol);
-            }
-            if (!isTypeAnyOrAllConstituentTypesHaveKind(rightType, 2588672 /* ObjectType */ | 16384 /* TypeParameter */)) {
-                error(right, ts.Diagnostics.The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter);
+        function checkWithStatement(node) {
+            // Grammar checking for withStatement
+            if (!checkGrammarStatementInAmbientContext(node)) {
+                if (node.flags & 16384 /* AwaitContext */) {
+                    grammarErrorOnFirstToken(node, ts.Diagnostics.with_statements_are_not_allowed_in_an_async_function_block);
+                }
             }
-            return booleanType;
-        }
-        function checkObjectLiteralAssignment(node, sourceType, contextualMapper) {
-            var properties = node.properties;
-            for (var _i = 0, properties_4 = properties; _i < properties_4.length; _i++) {
-                var p = properties_4[_i];
-                checkObjectLiteralDestructuringPropertyAssignment(sourceType, p, contextualMapper);
+            checkExpression(node.expression);
+            var sourceFile = ts.getSourceFileOfNode(node);
+            if (!hasParseDiagnostics(sourceFile)) {
+                var start = ts.getSpanOfTokenAtPosition(sourceFile, node.pos).start;
+                var end = node.statement.pos;
+                grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.The_with_statement_is_not_supported_All_symbols_in_a_with_block_will_have_type_any);
             }
-            return sourceType;
         }
-        function checkObjectLiteralDestructuringPropertyAssignment(objectLiteralType, property, contextualMapper) {
-            if (property.kind === 253 /* PropertyAssignment */ || property.kind === 254 /* ShorthandPropertyAssignment */) {
-                var name_17 = property.name;
-                if (name_17.kind === 140 /* ComputedPropertyName */) {
-                    checkComputedPropertyName(name_17);
-                }
-                if (isComputedNonLiteralName(name_17)) {
-                    return undefined;
-                }
-                var text = getTextOfPropertyName(name_17);
-                var type = isTypeAny(objectLiteralType)
-                    ? objectLiteralType
-                    : getTypeOfPropertyOfType(objectLiteralType, text) ||
-                        isNumericLiteralName(text) && getIndexTypeOfType(objectLiteralType, 1 /* Number */) ||
-                        getIndexTypeOfType(objectLiteralType, 0 /* String */);
-                if (type) {
-                    if (property.kind === 254 /* ShorthandPropertyAssignment */) {
-                        return checkDestructuringAssignment(property, type);
+        function checkSwitchStatement(node) {
+            // Grammar checking
+            checkGrammarStatementInAmbientContext(node);
+            var firstDefaultClause;
+            var hasDuplicateDefaultClause = false;
+            var expressionType = checkExpression(node.expression);
+            var expressionIsLiteral = isLiteralType(expressionType);
+            ts.forEach(node.caseBlock.clauses, function (clause) {
+                // Grammar check for duplicate default clauses, skip if we already report duplicate default clause
+                if (clause.kind === 258 /* DefaultClause */ && !hasDuplicateDefaultClause) {
+                    if (firstDefaultClause === undefined) {
+                        firstDefaultClause = clause;
                     }
                     else {
-                        // non-shorthand property assignments should always have initializers
-                        return checkDestructuringAssignment(property.initializer, type);
+                        var sourceFile = ts.getSourceFileOfNode(node);
+                        var start = ts.skipTrivia(sourceFile.text, clause.pos);
+                        var end = clause.statements.length > 0 ? clause.statements[0].pos : clause.end;
+                        grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.A_default_clause_cannot_appear_more_than_once_in_a_switch_statement);
+                        hasDuplicateDefaultClause = true;
                     }
                 }
-                else {
-                    error(name_17, ts.Diagnostics.Type_0_has_no_property_1_and_no_string_index_signature, typeToString(objectLiteralType), ts.declarationNameToString(name_17));
+                if (produceDiagnostics && clause.kind === 257 /* CaseClause */) {
+                    var caseClause = clause;
+                    // TypeScript 1.0 spec (April 2014): 5.9
+                    // In a 'switch' statement, each 'case' expression must be of a type that is comparable
+                    // to or from the type of the 'switch' expression.
+                    var caseType = checkExpression(caseClause.expression);
+                    var caseIsLiteral = isLiteralType(caseType);
+                    var comparedExpressionType = expressionType;
+                    if (!caseIsLiteral || !expressionIsLiteral) {
+                        caseType = caseIsLiteral ? getBaseTypeOfLiteralType(caseType) : caseType;
+                        comparedExpressionType = getBaseTypeOfLiteralType(expressionType);
+                    }
+                    if (!isTypeEqualityComparableTo(comparedExpressionType, caseType)) {
+                        // expressionType is not comparable to caseType, try the reversed check and report errors if it fails
+                        checkTypeComparableTo(caseType, comparedExpressionType, caseClause.expression, /*headMessage*/ undefined);
+                    }
                 }
+                ts.forEach(clause.statements, checkSourceElement);
+            });
+            if (node.caseBlock.locals) {
+                registerForUnusedIdentifiersCheck(node.caseBlock);
             }
-            else {
-                error(property, ts.Diagnostics.Property_assignment_expected);
+        }
+        function checkLabeledStatement(node) {
+            // Grammar checking
+            if (!checkGrammarStatementInAmbientContext(node)) {
+                ts.findAncestor(node.parent, function (current) {
+                    if (ts.isFunctionLike(current)) {
+                        return "quit";
+                    }
+                    if (current.kind === 222 /* LabeledStatement */ && current.label.text === node.label.text) {
+                        var sourceFile = ts.getSourceFileOfNode(node);
+                        grammarErrorOnNode(node.label, ts.Diagnostics.Duplicate_label_0, ts.getTextOfNodeFromSourceText(sourceFile.text, node.label));
+                        return true;
+                    }
+                });
             }
+            // ensure that label is unique
+            checkSourceElement(node.statement);
         }
-        function checkArrayLiteralAssignment(node, sourceType, contextualMapper) {
-            // This elementType will be used if the specific property corresponding to this index is not
-            // present (aka the tuple element property). This call also checks that the parentType is in
-            // fact an iterable or array (depending on target language).
-            var elementType = checkIteratedTypeOrElementType(sourceType, node, /*allowStringInput*/ false) || unknownType;
-            var elements = node.elements;
-            for (var i = 0; i < elements.length; i++) {
-                checkArrayLiteralDestructuringElementAssignment(node, sourceType, i, elementType, contextualMapper);
+        function checkThrowStatement(node) {
+            // Grammar checking
+            if (!checkGrammarStatementInAmbientContext(node)) {
+                if (node.expression === undefined) {
+                    grammarErrorAfterFirstToken(node, ts.Diagnostics.Line_break_not_permitted_here);
+                }
+            }
+            if (node.expression) {
+                checkExpression(node.expression);
             }
-            return sourceType;
         }
-        function checkArrayLiteralDestructuringElementAssignment(node, sourceType, elementIndex, elementType, contextualMapper) {
-            var elements = node.elements;
-            var element = elements[elementIndex];
-            if (element.kind !== 193 /* OmittedExpression */) {
-                if (element.kind !== 191 /* SpreadElementExpression */) {
-                    var propName = "" + elementIndex;
-                    var type = isTypeAny(sourceType)
-                        ? sourceType
-                        : isTupleLikeType(sourceType)
-                            ? getTypeOfPropertyOfType(sourceType, propName)
-                            : elementType;
-                    if (type) {
-                        return checkDestructuringAssignment(element, type, contextualMapper);
-                    }
-                    else {
-                        // We still need to check element expression here because we may need to set appropriate flag on the expression
-                        // such as NodeCheckFlags.LexicalThis on "this"expression.
-                        checkExpression(element);
-                        if (isTupleType(sourceType)) {
-                            error(element, ts.Diagnostics.Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2, typeToString(sourceType), getTypeReferenceArity(sourceType), elements.length);
-                        }
-                        else {
-                            error(element, ts.Diagnostics.Type_0_has_no_property_1, typeToString(sourceType), propName);
-                        }
+        function checkTryStatement(node) {
+            // Grammar checking
+            checkGrammarStatementInAmbientContext(node);
+            checkBlock(node.tryBlock);
+            var catchClause = node.catchClause;
+            if (catchClause) {
+                // Grammar checking
+                if (catchClause.variableDeclaration) {
+                    if (catchClause.variableDeclaration.type) {
+                        grammarErrorOnFirstToken(catchClause.variableDeclaration.type, ts.Diagnostics.Catch_clause_variable_cannot_have_a_type_annotation);
                     }
-                }
-                else {
-                    if (elementIndex < elements.length - 1) {
-                        error(element, ts.Diagnostics.A_rest_element_must_be_last_in_an_array_destructuring_pattern);
+                    else if (catchClause.variableDeclaration.initializer) {
+                        grammarErrorOnFirstToken(catchClause.variableDeclaration.initializer, ts.Diagnostics.Catch_clause_variable_cannot_have_an_initializer);
                     }
                     else {
-                        var restExpression = element.expression;
-                        if (restExpression.kind === 187 /* BinaryExpression */ && restExpression.operatorToken.kind === 56 /* EqualsToken */) {
-                            error(restExpression.operatorToken, ts.Diagnostics.A_rest_element_cannot_have_an_initializer);
-                        }
-                        else {
-                            return checkDestructuringAssignment(restExpression, createArrayType(elementType), contextualMapper);
+                        var blockLocals_1 = catchClause.block.locals;
+                        if (blockLocals_1) {
+                            ts.forEachKey(catchClause.locals, function (caughtName) {
+                                var blockLocal = blockLocals_1.get(caughtName);
+                                if (blockLocal && (blockLocal.flags & 2 /* BlockScopedVariable */) !== 0) {
+                                    grammarErrorOnNode(blockLocal.valueDeclaration, ts.Diagnostics.Cannot_redeclare_identifier_0_in_catch_clause, caughtName);
+                                }
+                            });
                         }
                     }
                 }
+                checkBlock(catchClause.block);
+            }
+            if (node.finallyBlock) {
+                checkBlock(node.finallyBlock);
             }
-            return undefined;
         }
-        function checkDestructuringAssignment(exprOrAssignment, sourceType, contextualMapper) {
-            var target;
-            if (exprOrAssignment.kind === 254 /* ShorthandPropertyAssignment */) {
-                var prop = exprOrAssignment;
-                if (prop.objectAssignmentInitializer) {
-                    // In strict null checking mode, if a default value of a non-undefined type is specified, remove
-                    // undefined from the final type.
-                    if (strictNullChecks &&
-                        !(getFalsyFlags(checkExpression(prop.objectAssignmentInitializer)) & 2048 /* Undefined */)) {
-                        sourceType = getTypeWithFacts(sourceType, 131072 /* NEUndefined */);
+        function checkIndexConstraints(type) {
+            var declaredNumberIndexer = getIndexDeclarationOfSymbol(type.symbol, 1 /* Number */);
+            var declaredStringIndexer = getIndexDeclarationOfSymbol(type.symbol, 0 /* String */);
+            var stringIndexType = getIndexTypeOfType(type, 0 /* String */);
+            var numberIndexType = getIndexTypeOfType(type, 1 /* Number */);
+            if (stringIndexType || numberIndexType) {
+                ts.forEach(getPropertiesOfObjectType(type), function (prop) {
+                    var propType = getTypeOfSymbol(prop);
+                    checkIndexConstraintForProperty(prop, propType, type, declaredStringIndexer, stringIndexType, 0 /* String */);
+                    checkIndexConstraintForProperty(prop, propType, type, declaredNumberIndexer, numberIndexType, 1 /* Number */);
+                });
+                if (getObjectFlags(type) & 1 /* Class */ && ts.isClassLike(type.symbol.valueDeclaration)) {
+                    var classDeclaration = type.symbol.valueDeclaration;
+                    for (var _i = 0, _a = classDeclaration.members; _i < _a.length; _i++) {
+                        var member = _a[_i];
+                        // Only process instance properties with computed names here.
+                        // Static properties cannot be in conflict with indexers,
+                        // and properties with literal names were already checked.
+                        if (!(ts.getModifierFlags(member) & 32 /* Static */) && ts.hasDynamicName(member)) {
+                            var propType = getTypeOfSymbol(member.symbol);
+                            checkIndexConstraintForProperty(member.symbol, propType, type, declaredStringIndexer, stringIndexType, 0 /* String */);
+                            checkIndexConstraintForProperty(member.symbol, propType, type, declaredNumberIndexer, numberIndexType, 1 /* Number */);
+                        }
                     }
-                    checkBinaryLikeExpression(prop.name, prop.equalsToken, prop.objectAssignmentInitializer, contextualMapper);
                 }
-                target = exprOrAssignment.name;
             }
-            else {
-                target = exprOrAssignment;
-            }
-            if (target.kind === 187 /* BinaryExpression */ && target.operatorToken.kind === 56 /* EqualsToken */) {
-                checkBinaryExpression(target, contextualMapper);
-                target = target.left;
+            var errorNode;
+            if (stringIndexType && numberIndexType) {
+                errorNode = declaredNumberIndexer || declaredStringIndexer;
+                // condition 'errorNode === undefined' may appear if types does not declare nor string neither number indexer
+                if (!errorNode && (getObjectFlags(type) & 2 /* Interface */)) {
+                    var someBaseTypeHasBothIndexers = ts.forEach(getBaseTypes(type), function (base) { return getIndexTypeOfType(base, 0 /* String */) && getIndexTypeOfType(base, 1 /* Number */); });
+                    errorNode = someBaseTypeHasBothIndexers ? undefined : type.symbol.declarations[0];
+                }
             }
-            if (target.kind === 171 /* ObjectLiteralExpression */) {
-                return checkObjectLiteralAssignment(target, sourceType, contextualMapper);
+            if (errorNode && !isTypeAssignableTo(numberIndexType, stringIndexType)) {
+                error(errorNode, ts.Diagnostics.Numeric_index_type_0_is_not_assignable_to_string_index_type_1, typeToString(numberIndexType), typeToString(stringIndexType));
             }
-            if (target.kind === 170 /* ArrayLiteralExpression */) {
-                return checkArrayLiteralAssignment(target, sourceType, contextualMapper);
+            function checkIndexConstraintForProperty(prop, propertyType, containingType, indexDeclaration, indexType, indexKind) {
+                if (!indexType) {
+                    return;
+                }
+                var propDeclaration = prop.valueDeclaration;
+                // index is numeric and property name is not valid numeric literal
+                if (indexKind === 1 /* Number */ && !(propDeclaration ? isNumericName(ts.getNameOfDeclaration(propDeclaration)) : isNumericLiteralName(prop.name))) {
+                    return;
+                }
+                // perform property check if property or indexer is declared in 'type'
+                // this allows us to rule out cases when both property and indexer are inherited from the base class
+                var errorNode;
+                if (propDeclaration &&
+                    (propDeclaration.kind === 194 /* BinaryExpression */ ||
+                        ts.getNameOfDeclaration(propDeclaration).kind === 144 /* ComputedPropertyName */ ||
+                        prop.parent === containingType.symbol)) {
+                    errorNode = propDeclaration;
+                }
+                else if (indexDeclaration) {
+                    errorNode = indexDeclaration;
+                }
+                else if (getObjectFlags(containingType) & 2 /* Interface */) {
+                    // for interfaces property and indexer might be inherited from different bases
+                    // check if any base class already has both property and indexer.
+                    // check should be performed only if 'type' is the first type that brings property\indexer together
+                    var someBaseClassHasBothPropertyAndIndexer = ts.forEach(getBaseTypes(containingType), function (base) { return getPropertyOfObjectType(base, prop.name) && getIndexTypeOfType(base, indexKind); });
+                    errorNode = someBaseClassHasBothPropertyAndIndexer ? undefined : containingType.symbol.declarations[0];
+                }
+                if (errorNode && !isTypeAssignableTo(propertyType, indexType)) {
+                    var errorMessage = indexKind === 0 /* String */
+                        ? ts.Diagnostics.Property_0_of_type_1_is_not_assignable_to_string_index_type_2
+                        : ts.Diagnostics.Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2;
+                    error(errorNode, errorMessage, symbolToString(prop), typeToString(propertyType), typeToString(indexType));
+                }
             }
-            return checkReferenceAssignment(target, sourceType, contextualMapper);
         }
-        function checkReferenceAssignment(target, sourceType, contextualMapper) {
-            var targetType = checkExpression(target, contextualMapper);
-            if (checkReferenceExpression(target, ts.Diagnostics.Invalid_left_hand_side_of_assignment_expression, ts.Diagnostics.Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property)) {
-                checkTypeAssignableTo(sourceType, targetType, target, /*headMessage*/ undefined);
+        function checkTypeNameIsReserved(name, message) {
+            // TS 1.0 spec (April 2014): 3.6.1
+            // The predefined type keywords are reserved and cannot be used as names of user defined types.
+            switch (name.text) {
+                case "any":
+                case "number":
+                case "boolean":
+                case "string":
+                case "symbol":
+                case "void":
+                case "object":
+                    error(name, message, name.text);
             }
-            return sourceType;
         }
         /**
-         * This is a *shallow* check: An expression is side-effect-free if the
-         * evaluation of the expression *itself* cannot produce side effects.
-         * For example, x++ / 3 is side-effect free because the / operator
-         * does not have side effects.
-         * The intent is to "smell test" an expression for correctness in positions where
-         * its value is discarded (e.g. the left side of the comma operator).
+         * Check each type parameter and check that type parameters have no duplicate type parameter declarations
          */
-        function isSideEffectFree(node) {
-            node = ts.skipParentheses(node);
-            switch (node.kind) {
-                case 69 /* Identifier */:
-                case 9 /* StringLiteral */:
-                case 10 /* RegularExpressionLiteral */:
-                case 176 /* TaggedTemplateExpression */:
-                case 189 /* TemplateExpression */:
-                case 11 /* NoSubstitutionTemplateLiteral */:
-                case 8 /* NumericLiteral */:
-                case 99 /* TrueKeyword */:
-                case 84 /* FalseKeyword */:
-                case 93 /* NullKeyword */:
-                case 135 /* UndefinedKeyword */:
-                case 179 /* FunctionExpression */:
-                case 192 /* ClassExpression */:
-                case 180 /* ArrowFunction */:
-                case 170 /* ArrayLiteralExpression */:
-                case 171 /* ObjectLiteralExpression */:
-                case 182 /* TypeOfExpression */:
-                case 196 /* NonNullExpression */:
-                case 242 /* JsxSelfClosingElement */:
-                case 241 /* JsxElement */:
-                    return true;
-                case 188 /* ConditionalExpression */:
-                    return isSideEffectFree(node.whenTrue) &&
-                        isSideEffectFree(node.whenFalse);
-                case 187 /* BinaryExpression */:
-                    if (ts.isAssignmentOperator(node.operatorToken.kind)) {
-                        return false;
+        function checkTypeParameters(typeParameterDeclarations) {
+            if (typeParameterDeclarations) {
+                var seenDefault = false;
+                for (var i = 0; i < typeParameterDeclarations.length; i++) {
+                    var node = typeParameterDeclarations[i];
+                    checkTypeParameter(node);
+                    if (produceDiagnostics) {
+                        if (node.default) {
+                            seenDefault = true;
+                        }
+                        else if (seenDefault) {
+                            error(node, ts.Diagnostics.Required_type_parameters_may_not_follow_optional_type_parameters);
+                        }
+                        for (var j = 0; j < i; j++) {
+                            if (typeParameterDeclarations[j].symbol === node.symbol) {
+                                error(node.name, ts.Diagnostics.Duplicate_identifier_0, ts.declarationNameToString(node.name));
+                            }
+                        }
                     }
-                    return isSideEffectFree(node.left) &&
-                        isSideEffectFree(node.right);
-                case 185 /* PrefixUnaryExpression */:
-                case 186 /* PostfixUnaryExpression */:
-                    // Unary operators ~, !, +, and - have no side effects.
-                    // The rest do.
-                    switch (node.operator) {
-                        case 49 /* ExclamationToken */:
-                        case 35 /* PlusToken */:
-                        case 36 /* MinusToken */:
-                        case 50 /* TildeToken */:
-                            return true;
+                }
+            }
+        }
+        /** Check that type parameter lists are identical across multiple declarations */
+        function checkTypeParameterListsIdentical(symbol) {
+            if (symbol.declarations.length === 1) {
+                return;
+            }
+            var links = getSymbolLinks(symbol);
+            if (!links.typeParametersChecked) {
+                links.typeParametersChecked = true;
+                var declarations = getClassOrInterfaceDeclarationsOfSymbol(symbol);
+                if (declarations.length <= 1) {
+                    return;
+                }
+                var type = getDeclaredTypeOfSymbol(symbol);
+                if (!areTypeParametersIdentical(declarations, type.localTypeParameters)) {
+                    // Report an error on every conflicting declaration.
+                    var name_30 = symbolToString(symbol);
+                    for (var _i = 0, declarations_6 = declarations; _i < declarations_6.length; _i++) {
+                        var declaration = declarations_6[_i];
+                        error(declaration.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_type_parameters, name_30);
                     }
+                }
+            }
+        }
+        function areTypeParametersIdentical(declarations, typeParameters) {
+            var maxTypeArgumentCount = ts.length(typeParameters);
+            var minTypeArgumentCount = getMinTypeArgumentCount(typeParameters);
+            for (var _i = 0, declarations_7 = declarations; _i < declarations_7.length; _i++) {
+                var declaration = declarations_7[_i];
+                // If this declaration has too few or too many type parameters, we report an error
+                var numTypeParameters = ts.length(declaration.typeParameters);
+                if (numTypeParameters < minTypeArgumentCount || numTypeParameters > maxTypeArgumentCount) {
                     return false;
-                // Some forms listed here for clarity
-                case 183 /* VoidExpression */: // Explicit opt-out
-                case 177 /* TypeAssertionExpression */: // Not SEF, but can produce useful type warnings
-                case 195 /* AsExpression */: // Not SEF, but can produce useful type warnings
-                default:
-                    return false;
+                }
+                for (var i = 0; i < numTypeParameters; i++) {
+                    var source = declaration.typeParameters[i];
+                    var target = typeParameters[i];
+                    // If the type parameter node does not have the same as the resolved type
+                    // parameter at this position, we report an error.
+                    if (source.name.text !== target.symbol.name) {
+                        return false;
+                    }
+                    // If the type parameter node does not have an identical constraint as the resolved
+                    // type parameter at this position, we report an error.
+                    var sourceConstraint = source.constraint && getTypeFromTypeNode(source.constraint);
+                    var targetConstraint = getConstraintFromTypeParameter(target);
+                    if ((sourceConstraint || targetConstraint) &&
+                        (!sourceConstraint || !targetConstraint || !isTypeIdenticalTo(sourceConstraint, targetConstraint))) {
+                        return false;
+                    }
+                    // If the type parameter node has a default and it is not identical to the default
+                    // for the type parameter at this position, we report an error.
+                    var sourceDefault = source.default && getTypeFromTypeNode(source.default);
+                    var targetDefault = getDefaultFromTypeParameter(target);
+                    if (sourceDefault && targetDefault && !isTypeIdenticalTo(sourceDefault, targetDefault)) {
+                        return false;
+                    }
+                }
             }
+            return true;
         }
-        function isTypeEqualityComparableTo(source, target) {
-            return (target.flags & 6144 /* Nullable */) !== 0 || isTypeComparableTo(source, target);
+        function checkClassExpression(node) {
+            checkClassLikeDeclaration(node);
+            checkNodeDeferred(node);
+            return getTypeOfSymbol(getSymbolOfNode(node));
         }
-        function getBestChoiceType(type1, type2) {
-            var firstAssignableToSecond = isTypeAssignableTo(type1, type2);
-            var secondAssignableToFirst = isTypeAssignableTo(type2, type1);
-            return secondAssignableToFirst && !firstAssignableToSecond ? type1 :
-                firstAssignableToSecond && !secondAssignableToFirst ? type2 :
-                    getUnionType([type1, type2], /*subtypeReduction*/ true);
+        function checkClassExpressionDeferred(node) {
+            ts.forEach(node.members, checkSourceElement);
+            registerForUnusedIdentifiersCheck(node);
         }
-        function checkBinaryExpression(node, contextualMapper) {
-            return checkBinaryLikeExpression(node.left, node.operatorToken, node.right, contextualMapper, node);
+        function checkClassDeclaration(node) {
+            if (!node.name && !(ts.getModifierFlags(node) & 512 /* Default */)) {
+                grammarErrorOnFirstToken(node, ts.Diagnostics.A_class_declaration_without_the_default_modifier_must_have_a_name);
+            }
+            checkClassLikeDeclaration(node);
+            ts.forEach(node.members, checkSourceElement);
+            registerForUnusedIdentifiersCheck(node);
         }
-        function checkBinaryLikeExpression(left, operatorToken, right, contextualMapper, errorNode) {
-            var operator = operatorToken.kind;
-            if (operator === 56 /* EqualsToken */ && (left.kind === 171 /* ObjectLiteralExpression */ || left.kind === 170 /* ArrayLiteralExpression */)) {
-                return checkDestructuringAssignment(left, checkExpression(right, contextualMapper), contextualMapper);
+        function checkClassLikeDeclaration(node) {
+            checkGrammarClassLikeDeclaration(node);
+            checkDecorators(node);
+            if (node.name) {
+                checkTypeNameIsReserved(node.name, ts.Diagnostics.Class_name_cannot_be_0);
+                checkCollisionWithCapturedThisVariable(node, node.name);
+                checkCollisionWithCapturedNewTargetVariable(node, node.name);
+                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
+                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
             }
-            var leftType = checkExpression(left, contextualMapper);
-            var rightType = checkExpression(right, contextualMapper);
-            switch (operator) {
-                case 37 /* AsteriskToken */:
-                case 38 /* AsteriskAsteriskToken */:
-                case 59 /* AsteriskEqualsToken */:
-                case 60 /* AsteriskAsteriskEqualsToken */:
-                case 39 /* SlashToken */:
-                case 61 /* SlashEqualsToken */:
-                case 40 /* PercentToken */:
-                case 62 /* PercentEqualsToken */:
-                case 36 /* MinusToken */:
-                case 58 /* MinusEqualsToken */:
-                case 43 /* LessThanLessThanToken */:
-                case 63 /* LessThanLessThanEqualsToken */:
-                case 44 /* GreaterThanGreaterThanToken */:
-                case 64 /* GreaterThanGreaterThanEqualsToken */:
-                case 45 /* GreaterThanGreaterThanGreaterThanToken */:
-                case 65 /* GreaterThanGreaterThanGreaterThanEqualsToken */:
-                case 47 /* BarToken */:
-                case 67 /* BarEqualsToken */:
-                case 48 /* CaretToken */:
-                case 68 /* CaretEqualsToken */:
-                case 46 /* AmpersandToken */:
-                case 66 /* AmpersandEqualsToken */:
-                    if (leftType === silentNeverType || rightType === silentNeverType) {
-                        return silentNeverType;
-                    }
-                    // TypeScript 1.0 spec (April 2014): 4.19.1
-                    // These operators require their operands to be of type Any, the Number primitive type,
-                    // or an enum type. Operands of an enum type are treated
-                    // as having the primitive type Number. If one operand is the null or undefined value,
-                    // it is treated as having the type of the other operand.
-                    // The result is always of the Number primitive type.
-                    if (leftType.flags & 6144 /* Nullable */)
-                        leftType = rightType;
-                    if (rightType.flags & 6144 /* Nullable */)
-                        rightType = leftType;
-                    leftType = getNonNullableType(leftType);
-                    rightType = getNonNullableType(rightType);
-                    var suggestedOperator = void 0;
-                    // if a user tries to apply a bitwise operator to 2 boolean operands
-                    // try and return them a helpful suggestion
-                    if ((leftType.flags & 136 /* BooleanLike */) &&
-                        (rightType.flags & 136 /* BooleanLike */) &&
-                        (suggestedOperator = getSuggestedBooleanOperator(operatorToken.kind)) !== undefined) {
-                        error(errorNode || operatorToken, ts.Diagnostics.The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead, ts.tokenToString(operatorToken.kind), ts.tokenToString(suggestedOperator));
-                    }
-                    else {
-                        // otherwise just check each operand separately and report errors as normal
-                        var leftOk = checkArithmeticOperandType(left, leftType, ts.Diagnostics.The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type);
-                        var rightOk = checkArithmeticOperandType(right, rightType, ts.Diagnostics.The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type);
-                        if (leftOk && rightOk) {
-                            checkAssignmentOperator(numberType);
+            checkTypeParameters(node.typeParameters);
+            checkExportsOnMergedDeclarations(node);
+            var symbol = getSymbolOfNode(node);
+            var type = getDeclaredTypeOfSymbol(symbol);
+            var typeWithThis = getTypeWithThisArgument(type);
+            var staticType = getTypeOfSymbol(symbol);
+            checkTypeParameterListsIdentical(symbol);
+            checkClassForDuplicateDeclarations(node);
+            // Only check for reserved static identifiers on non-ambient context.
+            if (!ts.isInAmbientContext(node)) {
+                checkClassForStaticPropertyNameConflicts(node);
+            }
+            var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
+            if (baseTypeNode) {
+                if (languageVersion < 2 /* ES2015 */) {
+                    checkExternalEmitHelpers(baseTypeNode.parent, 1 /* Extends */);
+                }
+                var baseTypes = getBaseTypes(type);
+                if (baseTypes.length && produceDiagnostics) {
+                    var baseType_1 = baseTypes[0];
+                    var baseConstructorType = getBaseConstructorTypeOfClass(type);
+                    var staticBaseType = getApparentType(baseConstructorType);
+                    checkBaseTypeAccessibility(staticBaseType, baseTypeNode);
+                    checkSourceElement(baseTypeNode.expression);
+                    if (ts.some(baseTypeNode.typeArguments)) {
+                        ts.forEach(baseTypeNode.typeArguments, checkSourceElement);
+                        for (var _i = 0, _a = getConstructorsForTypeArguments(staticBaseType, baseTypeNode.typeArguments, baseTypeNode); _i < _a.length; _i++) {
+                            var constructor = _a[_i];
+                            if (!checkTypeArgumentConstraints(constructor.typeParameters, baseTypeNode.typeArguments)) {
+                                break;
+                            }
                         }
                     }
-                    return numberType;
-                case 35 /* PlusToken */:
-                case 57 /* PlusEqualsToken */:
-                    if (leftType === silentNeverType || rightType === silentNeverType) {
-                        return silentNeverType;
-                    }
-                    // TypeScript 1.0 spec (April 2014): 4.19.2
-                    // The binary + operator requires both operands to be of the Number primitive type or an enum type,
-                    // or at least one of the operands to be of type Any or the String primitive type.
-                    // If one operand is the null or undefined value, it is treated as having the type of the other operand.
-                    if (leftType.flags & 6144 /* Nullable */)
-                        leftType = rightType;
-                    if (rightType.flags & 6144 /* Nullable */)
-                        rightType = leftType;
-                    leftType = getNonNullableType(leftType);
-                    rightType = getNonNullableType(rightType);
-                    var resultType = void 0;
-                    if (isTypeOfKind(leftType, 340 /* NumberLike */) && isTypeOfKind(rightType, 340 /* NumberLike */)) {
-                        // Operands of an enum type are treated as having the primitive type Number.
-                        // If both operands are of the Number primitive type, the result is of the Number primitive type.
-                        resultType = numberType;
+                    checkTypeAssignableTo(typeWithThis, getTypeWithThisArgument(baseType_1, type.thisType), node.name || node, ts.Diagnostics.Class_0_incorrectly_extends_base_class_1);
+                    checkTypeAssignableTo(staticType, getTypeWithoutSignatures(staticBaseType), node.name || node, ts.Diagnostics.Class_static_side_0_incorrectly_extends_base_class_static_side_1);
+                    if (baseConstructorType.flags & 540672 /* TypeVariable */ && !isMixinConstructorType(staticType)) {
+                        error(node.name || node, ts.Diagnostics.A_mixin_class_must_have_a_constructor_with_a_single_rest_parameter_of_type_any);
                     }
-                    else {
-                        if (isTypeOfKind(leftType, 34 /* StringLike */) || isTypeOfKind(rightType, 34 /* StringLike */)) {
-                            // If one or both operands are of the String primitive type, the result is of the String primitive type.
-                            resultType = stringType;
-                        }
-                        else if (isTypeAny(leftType) || isTypeAny(rightType)) {
-                            // Otherwise, the result is of type Any.
-                            // NOTE: unknown type here denotes error type. Old compiler treated this case as any type so do we.
-                            resultType = leftType === unknownType || rightType === unknownType ? unknownType : anyType;
-                        }
-                        // Symbols are not allowed at all in arithmetic expressions
-                        if (resultType && !checkForDisallowedESSymbolOperand(operator)) {
-                            return resultType;
+                    if (!(staticBaseType.symbol && staticBaseType.symbol.flags & 32 /* Class */) && !(baseConstructorType.flags & 540672 /* TypeVariable */)) {
+                        // When the static base type is a "class-like" constructor function (but not actually a class), we verify
+                        // that all instantiated base constructor signatures return the same type. We can simply compare the type
+                        // references (as opposed to checking the structure of the types) because elsewhere we have already checked
+                        // that the base type is a class or interface type (and not, for example, an anonymous object type).
+                        var constructors = getInstantiatedConstructorsForTypeArguments(staticBaseType, baseTypeNode.typeArguments, baseTypeNode);
+                        if (ts.forEach(constructors, function (sig) { return getReturnTypeOfSignature(sig) !== baseType_1; })) {
+                            error(baseTypeNode.expression, ts.Diagnostics.Base_constructors_must_all_have_the_same_return_type);
                         }
                     }
-                    if (!resultType) {
-                        reportOperatorError();
-                        return anyType;
-                    }
-                    if (operator === 57 /* PlusEqualsToken */) {
-                        checkAssignmentOperator(resultType);
+                    checkKindsOfPropertyMemberOverrides(type, baseType_1);
+                }
+            }
+            var implementedTypeNodes = ts.getClassImplementsHeritageClauseElements(node);
+            if (implementedTypeNodes) {
+                for (var _b = 0, implementedTypeNodes_1 = implementedTypeNodes; _b < implementedTypeNodes_1.length; _b++) {
+                    var typeRefNode = implementedTypeNodes_1[_b];
+                    if (!ts.isEntityNameExpression(typeRefNode.expression)) {
+                        error(typeRefNode.expression, ts.Diagnostics.A_class_can_only_implement_an_identifier_Slashqualified_name_with_optional_type_arguments);
                     }
-                    return resultType;
-                case 25 /* LessThanToken */:
-                case 27 /* GreaterThanToken */:
-                case 28 /* LessThanEqualsToken */:
-                case 29 /* GreaterThanEqualsToken */:
-                    if (checkForDisallowedESSymbolOperand(operator)) {
-                        if (!isTypeComparableTo(leftType, rightType) && !isTypeComparableTo(rightType, leftType)) {
-                            reportOperatorError();
+                    checkTypeReferenceNode(typeRefNode);
+                    if (produceDiagnostics) {
+                        var t = getTypeFromTypeNode(typeRefNode);
+                        if (t !== unknownType) {
+                            if (isValidBaseType(t)) {
+                                checkTypeAssignableTo(typeWithThis, getTypeWithThisArgument(t, type.thisType), node.name || node, ts.Diagnostics.Class_0_incorrectly_implements_interface_1);
+                            }
+                            else {
+                                error(typeRefNode, ts.Diagnostics.A_class_may_only_implement_another_class_or_interface);
+                            }
                         }
                     }
-                    return booleanType;
-                case 30 /* EqualsEqualsToken */:
-                case 31 /* ExclamationEqualsToken */:
-                case 32 /* EqualsEqualsEqualsToken */:
-                case 33 /* ExclamationEqualsEqualsToken */:
-                    var leftIsLiteral = isLiteralType(leftType);
-                    var rightIsLiteral = isLiteralType(rightType);
-                    if (!leftIsLiteral || !rightIsLiteral) {
-                        leftType = leftIsLiteral ? getBaseTypeOfLiteralType(leftType) : leftType;
-                        rightType = rightIsLiteral ? getBaseTypeOfLiteralType(rightType) : rightType;
-                    }
-                    if (!isTypeEqualityComparableTo(leftType, rightType) && !isTypeEqualityComparableTo(rightType, leftType)) {
-                        reportOperatorError();
-                    }
-                    return booleanType;
-                case 91 /* InstanceOfKeyword */:
-                    return checkInstanceOfExpression(left, right, leftType, rightType);
-                case 90 /* InKeyword */:
-                    return checkInExpression(left, right, leftType, rightType);
-                case 51 /* AmpersandAmpersandToken */:
-                    return getTypeFacts(leftType) & 1048576 /* Truthy */ ?
-                        includeFalsyTypes(rightType, getFalsyFlags(strictNullChecks ? leftType : getBaseTypeOfLiteralType(rightType))) :
-                        leftType;
-                case 52 /* BarBarToken */:
-                    return getTypeFacts(leftType) & 2097152 /* Falsy */ ?
-                        getBestChoiceType(removeDefinitelyFalsyTypes(leftType), rightType) :
-                        leftType;
-                case 56 /* EqualsToken */:
-                    checkAssignmentOperator(rightType);
-                    return getRegularTypeOfObjectLiteral(rightType);
-                case 24 /* CommaToken */:
-                    if (!compilerOptions.allowUnreachableCode && isSideEffectFree(left)) {
-                        error(left, ts.Diagnostics.Left_side_of_comma_operator_is_unused_and_has_no_side_effects);
-                    }
-                    return rightType;
-            }
-            // Return true if there was no error, false if there was an error.
-            function checkForDisallowedESSymbolOperand(operator) {
-                var offendingSymbolOperand = maybeTypeOfKind(leftType, 512 /* ESSymbol */) ? left :
-                    maybeTypeOfKind(rightType, 512 /* ESSymbol */) ? right :
-                        undefined;
-                if (offendingSymbolOperand) {
-                    error(offendingSymbolOperand, ts.Diagnostics.The_0_operator_cannot_be_applied_to_type_symbol, ts.tokenToString(operator));
-                    return false;
                 }
-                return true;
             }
-            function getSuggestedBooleanOperator(operator) {
-                switch (operator) {
-                    case 47 /* BarToken */:
-                    case 67 /* BarEqualsToken */:
-                        return 52 /* BarBarToken */;
-                    case 48 /* CaretToken */:
-                    case 68 /* CaretEqualsToken */:
-                        return 33 /* ExclamationEqualsEqualsToken */;
-                    case 46 /* AmpersandToken */:
-                    case 66 /* AmpersandEqualsToken */:
-                        return 51 /* AmpersandAmpersandToken */;
-                    default:
-                        return undefined;
-                }
+            if (produceDiagnostics) {
+                checkIndexConstraints(type);
+                checkTypeForDuplicateIndexSignatures(node);
             }
-            function checkAssignmentOperator(valueType) {
-                if (produceDiagnostics && operator >= 56 /* FirstAssignment */ && operator <= 68 /* LastAssignment */) {
-                    // TypeScript 1.0 spec (April 2014): 4.17
-                    // An assignment of the form
-                    //    VarExpr = ValueExpr
-                    // requires VarExpr to be classified as a reference
-                    // A compound assignment furthermore requires VarExpr to be classified as a reference (section 4.1)
-                    // and the type of the non - compound operation to be assignable to the type of VarExpr.
-                    var ok = checkReferenceExpression(left, ts.Diagnostics.Invalid_left_hand_side_of_assignment_expression, ts.Diagnostics.Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property);
-                    // Use default messages
-                    if (ok) {
-                        // to avoid cascading errors check assignability only if 'isReference' check succeeded and no errors were reported
-                        checkTypeAssignableTo(valueType, leftType, left, /*headMessage*/ undefined);
+        }
+        function checkBaseTypeAccessibility(type, node) {
+            var signatures = getSignaturesOfType(type, 1 /* Construct */);
+            if (signatures.length) {
+                var declaration = signatures[0].declaration;
+                if (declaration && ts.getModifierFlags(declaration) & 8 /* Private */) {
+                    var typeClassDeclaration = getClassLikeDeclarationOfSymbol(type.symbol);
+                    if (!isNodeWithinClass(node, typeClassDeclaration)) {
+                        error(node, ts.Diagnostics.Cannot_extend_a_class_0_Class_constructor_is_marked_as_private, getFullyQualifiedName(type.symbol));
                     }
                 }
             }
-            function reportOperatorError() {
-                error(errorNode || operatorToken, ts.Diagnostics.Operator_0_cannot_be_applied_to_types_1_and_2, ts.tokenToString(operatorToken.kind), typeToString(leftType), typeToString(rightType));
-            }
         }
-        function isYieldExpressionInClass(node) {
-            var current = node;
-            var parent = node.parent;
-            while (parent) {
-                if (ts.isFunctionLike(parent) && current === parent.body) {
-                    return false;
-                }
-                else if (ts.isClassLike(current)) {
-                    return true;
-                }
-                current = parent;
-                parent = parent.parent;
-            }
-            return false;
+        function getTargetSymbol(s) {
+            // if symbol is instantiated its flags are not copied from the 'target'
+            // so we'll need to get back original 'target' symbol to work with correct set of flags
+            return ts.getCheckFlags(s) & 1 /* Instantiated */ ? s.target : s;
         }
-        function checkYieldExpression(node) {
-            // Grammar checking
-            if (produceDiagnostics) {
-                if (!(node.flags & 65536 /* YieldContext */) || isYieldExpressionInClass(node)) {
-                    grammarErrorOnFirstToken(node, ts.Diagnostics.A_yield_expression_is_only_allowed_in_a_generator_body);
-                }
-                if (isInParameterInitializerBeforeContainingFunction(node)) {
-                    error(node, ts.Diagnostics.yield_expressions_cannot_be_used_in_a_parameter_initializer);
+        function getClassLikeDeclarationOfSymbol(symbol) {
+            return ts.forEach(symbol.declarations, function (d) { return ts.isClassLike(d) ? d : undefined; });
+        }
+        function getClassOrInterfaceDeclarationsOfSymbol(symbol) {
+            return ts.filter(symbol.declarations, function (d) {
+                return d.kind === 229 /* ClassDeclaration */ || d.kind === 230 /* InterfaceDeclaration */;
+            });
+        }
+        function checkKindsOfPropertyMemberOverrides(type, baseType) {
+            // TypeScript 1.0 spec (April 2014): 8.2.3
+            // A derived class inherits all members from its base class it doesn't override.
+            // Inheritance means that a derived class implicitly contains all non - overridden members of the base class.
+            // Both public and private property members are inherited, but only public property members can be overridden.
+            // A property member in a derived class is said to override a property member in a base class
+            // when the derived class property member has the same name and kind(instance or static)
+            // as the base class property member.
+            // The type of an overriding property member must be assignable(section 3.8.4)
+            // to the type of the overridden property member, or otherwise a compile - time error occurs.
+            // Base class instance member functions can be overridden by derived class instance member functions,
+            // but not by other kinds of members.
+            // Base class instance member variables and accessors can be overridden by
+            // derived class instance member variables and accessors, but not by other kinds of members.
+            // NOTE: assignability is checked in checkClassDeclaration
+            var baseProperties = getPropertiesOfType(baseType);
+            for (var _i = 0, baseProperties_1 = baseProperties; _i < baseProperties_1.length; _i++) {
+                var baseProperty = baseProperties_1[_i];
+                var base = getTargetSymbol(baseProperty);
+                if (base.flags & 16777216 /* Prototype */) {
+                    continue;
                 }
-            }
-            if (node.expression) {
-                var func = ts.getContainingFunction(node);
-                // If the user's code is syntactically correct, the func should always have a star. After all,
-                // we are in a yield context.
-                if (func && func.asteriskToken) {
-                    var expressionType = checkExpressionCached(node.expression, /*contextualMapper*/ undefined);
-                    var expressionElementType = void 0;
-                    var nodeIsYieldStar = !!node.asteriskToken;
-                    if (nodeIsYieldStar) {
-                        expressionElementType = checkElementTypeOfIterable(expressionType, node.expression);
+                var derived = getTargetSymbol(getPropertyOfObjectType(type, base.name));
+                var baseDeclarationFlags = ts.getDeclarationModifierFlagsFromSymbol(base);
+                ts.Debug.assert(!!derived, "derived should point to something, even if it is the base class' declaration.");
+                if (derived) {
+                    // In order to resolve whether the inherited method was overridden in the base class or not,
+                    // we compare the Symbols obtained. Since getTargetSymbol returns the symbol on the *uninstantiated*
+                    // type declaration, derived and base resolve to the same symbol even in the case of generic classes.
+                    if (derived === base) {
+                        // derived class inherits base without override/redeclaration
+                        var derivedClassDecl = getClassLikeDeclarationOfSymbol(type.symbol);
+                        // It is an error to inherit an abstract member without implementing it or being declared abstract.
+                        // If there is no declaration for the derived class (as in the case of class expressions),
+                        // then the class cannot be declared abstract.
+                        if (baseDeclarationFlags & 128 /* Abstract */ && (!derivedClassDecl || !(ts.getModifierFlags(derivedClassDecl) & 128 /* Abstract */))) {
+                            if (derivedClassDecl.kind === 199 /* ClassExpression */) {
+                                error(derivedClassDecl, ts.Diagnostics.Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1, symbolToString(baseProperty), typeToString(baseType));
+                            }
+                            else {
+                                error(derivedClassDecl, ts.Diagnostics.Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2, typeToString(type), symbolToString(baseProperty), typeToString(baseType));
+                            }
+                        }
                     }
-                    // There is no point in doing an assignability check if the function
-                    // has no explicit return type because the return type is directly computed
-                    // from the yield expressions.
-                    if (func.type) {
-                        var signatureElementType = getElementTypeOfIterableIterator(getTypeFromTypeNode(func.type)) || anyType;
-                        if (nodeIsYieldStar) {
-                            checkTypeAssignableTo(expressionElementType, signatureElementType, node.expression, /*headMessage*/ undefined);
+                    else {
+                        // derived overrides base.
+                        var derivedDeclarationFlags = ts.getDeclarationModifierFlagsFromSymbol(derived);
+                        if (baseDeclarationFlags & 8 /* Private */ || derivedDeclarationFlags & 8 /* Private */) {
+                            // either base or derived property is private - not override, skip it
+                            continue;
+                        }
+                        if (isMethodLike(base) && isMethodLike(derived) || base.flags & 98308 /* PropertyOrAccessor */ && derived.flags & 98308 /* PropertyOrAccessor */) {
+                            // method is overridden with method or property/accessor is overridden with property/accessor - correct case
+                            continue;
+                        }
+                        var errorMessage = void 0;
+                        if (isMethodLike(base)) {
+                            if (derived.flags & 98304 /* Accessor */) {
+                                errorMessage = ts.Diagnostics.Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_accessor;
+                            }
+                            else {
+                                errorMessage = ts.Diagnostics.Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_property;
+                            }
+                        }
+                        else if (base.flags & 4 /* Property */) {
+                            errorMessage = ts.Diagnostics.Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_function;
                         }
                         else {
-                            checkTypeAssignableTo(expressionType, signatureElementType, node.expression, /*headMessage*/ undefined);
+                            errorMessage = ts.Diagnostics.Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_function;
                         }
+                        error(ts.getNameOfDeclaration(derived.valueDeclaration) || derived.valueDeclaration, errorMessage, typeToString(baseType), symbolToString(base), typeToString(type));
                     }
                 }
             }
-            // Both yield and yield* expressions have type 'any'
-            return anyType;
-        }
-        function checkConditionalExpression(node, contextualMapper) {
-            checkExpression(node.condition);
-            var type1 = checkExpression(node.whenTrue, contextualMapper);
-            var type2 = checkExpression(node.whenFalse, contextualMapper);
-            return getBestChoiceType(type1, type2);
         }
-        function checkLiteralExpression(node) {
-            if (node.kind === 8 /* NumericLiteral */) {
-                checkGrammarNumericLiteral(node);
-            }
-            switch (node.kind) {
-                case 9 /* StringLiteral */:
-                    return getFreshTypeOfLiteralType(getLiteralTypeForText(32 /* StringLiteral */, node.text));
-                case 8 /* NumericLiteral */:
-                    return getFreshTypeOfLiteralType(getLiteralTypeForText(64 /* NumberLiteral */, node.text));
-                case 99 /* TrueKeyword */:
-                    return trueType;
-                case 84 /* FalseKeyword */:
-                    return falseType;
+        function checkInheritedPropertiesAreIdentical(type, typeNode) {
+            var baseTypes = getBaseTypes(type);
+            if (baseTypes.length < 2) {
+                return true;
             }
-        }
-        function checkTemplateExpression(node) {
-            // We just want to check each expressions, but we are unconcerned with
-            // the type of each expression, as any value may be coerced into a string.
-            // It is worth asking whether this is what we really want though.
-            // A place where we actually *are* concerned with the expressions' types are
-            // in tagged templates.
-            ts.forEach(node.templateSpans, function (templateSpan) {
-                checkExpression(templateSpan.expression);
-            });
-            return stringType;
-        }
-        function checkExpressionWithContextualType(node, contextualType, contextualMapper) {
-            var saveContextualType = node.contextualType;
-            node.contextualType = contextualType;
-            var result = checkExpression(node, contextualMapper);
-            node.contextualType = saveContextualType;
-            return result;
-        }
-        function checkExpressionCached(node, contextualMapper) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                // When computing a type that we're going to cache, we need to ignore any ongoing control flow
-                // analysis because variables may have transient types in indeterminable states. Moving flowLoopStart
-                // to the top of the stack ensures all transient types are computed from a known point.
-                var saveFlowLoopStart = flowLoopStart;
-                flowLoopStart = flowLoopCount;
-                links.resolvedType = checkExpression(node, contextualMapper);
-                flowLoopStart = saveFlowLoopStart;
+            var seen = ts.createMap();
+            ts.forEach(resolveDeclaredMembers(type).declaredProperties, function (p) { seen.set(p.name, { prop: p, containingType: type }); });
+            var ok = true;
+            for (var _i = 0, baseTypes_2 = baseTypes; _i < baseTypes_2.length; _i++) {
+                var base = baseTypes_2[_i];
+                var properties = getPropertiesOfType(getTypeWithThisArgument(base, type.thisType));
+                for (var _a = 0, properties_7 = properties; _a < properties_7.length; _a++) {
+                    var prop = properties_7[_a];
+                    var existing = seen.get(prop.name);
+                    if (!existing) {
+                        seen.set(prop.name, { prop: prop, containingType: base });
+                    }
+                    else {
+                        var isInheritedProperty = existing.containingType !== type;
+                        if (isInheritedProperty && !isPropertyIdenticalTo(existing.prop, prop)) {
+                            ok = false;
+                            var typeName1 = typeToString(existing.containingType);
+                            var typeName2 = typeToString(base);
+                            var errorInfo = ts.chainDiagnosticMessages(/*details*/ undefined, ts.Diagnostics.Named_property_0_of_types_1_and_2_are_not_identical, symbolToString(prop), typeName1, typeName2);
+                            errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.Interface_0_cannot_simultaneously_extend_types_1_and_2, typeToString(type), typeName1, typeName2);
+                            diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(typeNode, errorInfo));
+                        }
+                    }
+                }
             }
-            return links.resolvedType;
-        }
-        function isTypeAssertion(node) {
-            node = skipParenthesizedNodes(node);
-            return node.kind === 177 /* TypeAssertionExpression */ || node.kind === 195 /* AsExpression */;
-        }
-        function checkDeclarationInitializer(declaration) {
-            var type = checkExpressionCached(declaration.initializer);
-            return ts.getCombinedNodeFlags(declaration) & 2 /* Const */ ||
-                ts.getCombinedModifierFlags(declaration) & 64 /* Readonly */ ||
-                isTypeAssertion(declaration.initializer) ? type : getWidenedLiteralType(type);
+            return ok;
         }
-        function isLiteralContextualType(contextualType) {
-            if (contextualType) {
-                if (contextualType.flags & 16384 /* TypeParameter */) {
-                    var apparentType = getApparentTypeOfTypeParameter(contextualType);
-                    // If the type parameter is constrained to the base primitive type we're checking for,
-                    // consider this a literal context. For example, given a type parameter 'T extends string',
-                    // this causes us to infer string literal types for T.
-                    if (apparentType.flags & (2 /* String */ | 4 /* Number */ | 8 /* Boolean */ | 16 /* Enum */)) {
-                        return true;
+        function checkInterfaceDeclaration(node) {
+            // Grammar checking
+            checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarInterfaceDeclaration(node);
+            checkTypeParameters(node.typeParameters);
+            if (produceDiagnostics) {
+                checkTypeNameIsReserved(node.name, ts.Diagnostics.Interface_name_cannot_be_0);
+                checkExportsOnMergedDeclarations(node);
+                var symbol = getSymbolOfNode(node);
+                checkTypeParameterListsIdentical(symbol);
+                // Only check this symbol once
+                var firstInterfaceDecl = ts.getDeclarationOfKind(symbol, 230 /* InterfaceDeclaration */);
+                if (node === firstInterfaceDecl) {
+                    var type = getDeclaredTypeOfSymbol(symbol);
+                    var typeWithThis = getTypeWithThisArgument(type);
+                    // run subsequent checks only if first set succeeded
+                    if (checkInheritedPropertiesAreIdentical(type, node.name)) {
+                        for (var _i = 0, _a = getBaseTypes(type); _i < _a.length; _i++) {
+                            var baseType = _a[_i];
+                            checkTypeAssignableTo(typeWithThis, getTypeWithThisArgument(baseType, type.thisType), node.name, ts.Diagnostics.Interface_0_incorrectly_extends_interface_1);
+                        }
+                        checkIndexConstraints(type);
                     }
-                    contextualType = apparentType;
                 }
-                return maybeTypeOfKind(contextualType, 480 /* Literal */);
+                checkObjectTypeForDuplicateDeclarations(node);
             }
-            return false;
-        }
-        function checkExpressionForMutableLocation(node, contextualMapper) {
-            var type = checkExpression(node, contextualMapper);
-            return isTypeAssertion(node) || isLiteralContextualType(getContextualType(node)) ? type : getWidenedLiteralType(type);
-        }
-        function checkPropertyAssignment(node, contextualMapper) {
-            // Do not use hasDynamicName here, because that returns false for well known symbols.
-            // We want to perform checkComputedPropertyName for all computed properties, including
-            // well known symbols.
-            if (node.name.kind === 140 /* ComputedPropertyName */) {
-                checkComputedPropertyName(node.name);
+            ts.forEach(ts.getInterfaceBaseTypeNodes(node), function (heritageElement) {
+                if (!ts.isEntityNameExpression(heritageElement.expression)) {
+                    error(heritageElement.expression, ts.Diagnostics.An_interface_can_only_extend_an_identifier_Slashqualified_name_with_optional_type_arguments);
+                }
+                checkTypeReferenceNode(heritageElement);
+            });
+            ts.forEach(node.members, checkSourceElement);
+            if (produceDiagnostics) {
+                checkTypeForDuplicateIndexSignatures(node);
+                registerForUnusedIdentifiersCheck(node);
             }
-            return checkExpressionForMutableLocation(node.initializer, contextualMapper);
         }
-        function checkObjectLiteralMethod(node, contextualMapper) {
+        function checkTypeAliasDeclaration(node) {
             // Grammar checking
-            checkGrammarMethod(node);
-            // Do not use hasDynamicName here, because that returns false for well known symbols.
-            // We want to perform checkComputedPropertyName for all computed properties, including
-            // well known symbols.
-            if (node.name.kind === 140 /* ComputedPropertyName */) {
-                checkComputedPropertyName(node.name);
-            }
-            var uninstantiatedType = checkFunctionExpressionOrObjectLiteralMethod(node, contextualMapper);
-            return instantiateTypeWithSingleGenericCallSignature(node, uninstantiatedType, contextualMapper);
+            checkGrammarDecorators(node) || checkGrammarModifiers(node);
+            checkTypeNameIsReserved(node.name, ts.Diagnostics.Type_alias_name_cannot_be_0);
+            checkTypeParameters(node.typeParameters);
+            checkSourceElement(node.type);
         }
-        function instantiateTypeWithSingleGenericCallSignature(node, type, contextualMapper) {
-            if (isInferentialContext(contextualMapper)) {
-                var signature = getSingleCallSignature(type);
-                if (signature && signature.typeParameters) {
-                    var contextualType = getApparentTypeOfContextualType(node);
-                    if (contextualType) {
-                        var contextualSignature = getSingleCallSignature(contextualType);
-                        if (contextualSignature && !contextualSignature.typeParameters) {
-                            return getOrCreateTypeFromSignature(instantiateSignatureInContextOf(signature, contextualSignature, contextualMapper));
-                        }
-                    }
+        function computeEnumMemberValues(node) {
+            var nodeLinks = getNodeLinks(node);
+            if (!(nodeLinks.flags & 16384 /* EnumValuesComputed */)) {
+                nodeLinks.flags |= 16384 /* EnumValuesComputed */;
+                var autoValue = 0;
+                for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
+                    var member = _a[_i];
+                    var value = computeMemberValue(member, autoValue);
+                    getNodeLinks(member).enumMemberValue = value;
+                    autoValue = typeof value === "number" ? value + 1 : undefined;
                 }
             }
-            return type;
         }
-        // Checks an expression and returns its type. The contextualMapper parameter serves two purposes: When
-        // contextualMapper is not undefined and not equal to the identityMapper function object it indicates that the
-        // expression is being inferentially typed (section 4.15.2 in spec) and provides the type mapper to use in
-        // conjunction with the generic contextual type. When contextualMapper is equal to the identityMapper function
-        // object, it serves as an indicator that all contained function and arrow expressions should be considered to
-        // have the wildcard function type; this form of type check is used during overload resolution to exclude
-        // contextually typed function and arrow expressions in the initial phase.
-        function checkExpression(node, contextualMapper) {
-            var type;
-            if (node.kind === 139 /* QualifiedName */) {
-                type = checkQualifiedName(node);
+        function computeMemberValue(member, autoValue) {
+            if (isComputedNonLiteralName(member.name)) {
+                error(member.name, ts.Diagnostics.Computed_property_names_are_not_allowed_in_enums);
             }
             else {
-                var uninstantiatedType = checkExpressionWorker(node, contextualMapper);
-                type = instantiateTypeWithSingleGenericCallSignature(node, uninstantiatedType, contextualMapper);
-            }
-            if (isConstEnumObjectType(type)) {
-                // enum object type for const enums are only permitted in:
-                // - 'left' in property access
-                // - 'object' in indexed access
-                // - target in rhs of import statement
-                var ok = (node.parent.kind === 172 /* PropertyAccessExpression */ && node.parent.expression === node) ||
-                    (node.parent.kind === 173 /* ElementAccessExpression */ && node.parent.expression === node) ||
-                    ((node.kind === 69 /* Identifier */ || node.kind === 139 /* QualifiedName */) && isInRightSideOfImportOrExportAssignment(node));
-                if (!ok) {
-                    error(node, ts.Diagnostics.const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_import_declaration_or_export_assignment);
+                var text = ts.getTextOfPropertyName(member.name);
+                if (isNumericLiteralName(text) && !isInfinityOrNaNString(text)) {
+                    error(member.name, ts.Diagnostics.An_enum_member_cannot_have_a_numeric_name);
                 }
             }
-            return type;
-        }
-        function checkExpressionWorker(node, contextualMapper) {
-            switch (node.kind) {
-                case 69 /* Identifier */:
-                    return checkIdentifier(node);
-                case 97 /* ThisKeyword */:
-                    return checkThisExpression(node);
-                case 95 /* SuperKeyword */:
-                    return checkSuperExpression(node);
-                case 93 /* NullKeyword */:
-                    return nullWideningType;
-                case 9 /* StringLiteral */:
-                case 8 /* NumericLiteral */:
-                case 99 /* TrueKeyword */:
-                case 84 /* FalseKeyword */:
-                    return checkLiteralExpression(node);
-                case 189 /* TemplateExpression */:
-                    return checkTemplateExpression(node);
-                case 11 /* NoSubstitutionTemplateLiteral */:
-                    return stringType;
-                case 10 /* RegularExpressionLiteral */:
-                    return globalRegExpType;
-                case 170 /* ArrayLiteralExpression */:
-                    return checkArrayLiteral(node, contextualMapper);
-                case 171 /* ObjectLiteralExpression */:
-                    return checkObjectLiteral(node, contextualMapper);
-                case 172 /* PropertyAccessExpression */:
-                    return checkPropertyAccessExpression(node);
-                case 173 /* ElementAccessExpression */:
-                    return checkIndexedAccess(node);
-                case 174 /* CallExpression */:
-                case 175 /* NewExpression */:
-                    return checkCallExpression(node);
-                case 176 /* TaggedTemplateExpression */:
-                    return checkTaggedTemplateExpression(node);
-                case 178 /* ParenthesizedExpression */:
-                    return checkExpression(node.expression, contextualMapper);
-                case 192 /* ClassExpression */:
-                    return checkClassExpression(node);
-                case 179 /* FunctionExpression */:
-                case 180 /* ArrowFunction */:
-                    return checkFunctionExpressionOrObjectLiteralMethod(node, contextualMapper);
-                case 182 /* TypeOfExpression */:
-                    return checkTypeOfExpression(node);
-                case 177 /* TypeAssertionExpression */:
-                case 195 /* AsExpression */:
-                    return checkAssertion(node);
-                case 196 /* NonNullExpression */:
-                    return checkNonNullAssertion(node);
-                case 181 /* DeleteExpression */:
-                    return checkDeleteExpression(node);
-                case 183 /* VoidExpression */:
-                    return checkVoidExpression(node);
-                case 184 /* AwaitExpression */:
-                    return checkAwaitExpression(node);
-                case 185 /* PrefixUnaryExpression */:
-                    return checkPrefixUnaryExpression(node);
-                case 186 /* PostfixUnaryExpression */:
-                    return checkPostfixUnaryExpression(node);
-                case 187 /* BinaryExpression */:
-                    return checkBinaryExpression(node, contextualMapper);
-                case 188 /* ConditionalExpression */:
-                    return checkConditionalExpression(node, contextualMapper);
-                case 191 /* SpreadElementExpression */:
-                    return checkSpreadElementExpression(node, contextualMapper);
-                case 193 /* OmittedExpression */:
-                    return undefinedWideningType;
-                case 190 /* YieldExpression */:
-                    return checkYieldExpression(node);
-                case 248 /* JsxExpression */:
-                    return checkJsxExpression(node);
-                case 241 /* JsxElement */:
-                    return checkJsxElement(node);
-                case 242 /* JsxSelfClosingElement */:
-                    return checkJsxSelfClosingElement(node);
-                case 243 /* JsxOpeningElement */:
-                    ts.Debug.fail("Shouldn't ever directly check a JsxOpeningElement");
+            if (member.initializer) {
+                return computeConstantValue(member);
             }
-            return unknownType;
-        }
-        // DECLARATION AND STATEMENT TYPE CHECKING
-        function checkTypeParameter(node) {
-            // Grammar Checking
-            if (node.expression) {
-                grammarErrorOnFirstToken(node.expression, ts.Diagnostics.Type_expected);
+            // In ambient enum declarations that specify no const modifier, enum member declarations that omit
+            // a value are considered computed members (as opposed to having auto-incremented values).
+            if (ts.isInAmbientContext(member.parent) && !ts.isConst(member.parent)) {
+                return undefined;
             }
-            checkSourceElement(node.constraint);
-            getConstraintOfTypeParameter(getDeclaredTypeOfTypeParameter(getSymbolOfNode(node)));
-            if (produceDiagnostics) {
-                checkTypeNameIsReserved(node.name, ts.Diagnostics.Type_parameter_name_cannot_be_0);
+            // If the member declaration specifies no value, the member is considered a constant enum member.
+            // If the member is the first member in the enum declaration, it is assigned the value zero.
+            // Otherwise, it is assigned the value of the immediately preceding member plus one, and an error
+            // occurs if the immediately preceding member is not a constant enum member.
+            if (autoValue !== undefined) {
+                return autoValue;
             }
+            error(member.name, ts.Diagnostics.Enum_member_must_have_initializer);
+            return undefined;
         }
-        function checkParameter(node) {
-            // Grammar checking
-            // It is a SyntaxError if the Identifier "eval" or the Identifier "arguments" occurs as the
-            // Identifier in a PropertySetParameterList of a PropertyAssignment that is contained in strict code
-            // or if its FunctionBody is strict code(11.1.5).
-            // Grammar checking
-            checkGrammarDecorators(node) || checkGrammarModifiers(node);
-            checkVariableLikeDeclaration(node);
-            var func = ts.getContainingFunction(node);
-            if (ts.getModifierFlags(node) & 92 /* ParameterPropertyModifier */) {
-                func = ts.getContainingFunction(node);
-                if (!(func.kind === 148 /* Constructor */ && ts.nodeIsPresent(func.body))) {
-                    error(node, ts.Diagnostics.A_parameter_property_is_only_allowed_in_a_constructor_implementation);
+        function computeConstantValue(member) {
+            var enumKind = getEnumKind(getSymbolOfNode(member.parent));
+            var isConstEnum = ts.isConst(member.parent);
+            var initializer = member.initializer;
+            var value = enumKind === 1 /* Literal */ && !isLiteralEnumMember(member) ? undefined : evaluate(initializer);
+            if (value !== undefined) {
+                if (isConstEnum && typeof value === "number" && !isFinite(value)) {
+                    error(initializer, isNaN(value) ?
+                        ts.Diagnostics.const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN :
+                        ts.Diagnostics.const_enum_member_initializer_was_evaluated_to_a_non_finite_value);
                 }
             }
-            if (node.questionToken && ts.isBindingPattern(node.name) && func.body) {
-                error(node, ts.Diagnostics.A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature);
+            else if (enumKind === 1 /* Literal */) {
+                error(initializer, ts.Diagnostics.Computed_values_are_not_permitted_in_an_enum_with_string_valued_members);
+                return 0;
             }
-            if (node.name.text === "this") {
-                if (ts.indexOf(func.parameters, node) !== 0) {
-                    error(node, ts.Diagnostics.A_this_parameter_must_be_the_first_parameter);
-                }
-                if (func.kind === 148 /* Constructor */ || func.kind === 152 /* ConstructSignature */ || func.kind === 157 /* ConstructorType */) {
-                    error(node, ts.Diagnostics.A_constructor_cannot_have_a_this_parameter);
-                }
+            else if (isConstEnum) {
+                error(initializer, ts.Diagnostics.In_const_enum_declarations_member_initializer_must_be_constant_expression);
             }
-            // Only check rest parameter type if it's not a binding pattern. Since binding patterns are
-            // not allowed in a rest parameter, we already have an error from checkGrammarParameterList.
-            if (node.dotDotDotToken && !ts.isBindingPattern(node.name) && !isArrayType(getTypeOfSymbol(node.symbol))) {
-                error(node, ts.Diagnostics.A_rest_parameter_must_be_of_an_array_type);
+            else if (ts.isInAmbientContext(member.parent)) {
+                error(initializer, ts.Diagnostics.In_ambient_enum_declarations_member_initializer_must_be_constant_expression);
             }
-        }
-        function isSyntacticallyValidGenerator(node) {
-            if (!node.asteriskToken || !node.body) {
-                return false;
+            else {
+                // Only here do we need to check that the initializer is assignable to the enum type.
+                checkTypeAssignableTo(checkExpression(initializer), getDeclaredTypeOfSymbol(getSymbolOfNode(member.parent)), initializer, /*headMessage*/ undefined);
             }
-            return node.kind === 147 /* MethodDeclaration */ ||
-                node.kind === 220 /* FunctionDeclaration */ ||
-                node.kind === 179 /* FunctionExpression */;
-        }
-        function getTypePredicateParameterIndex(parameterList, parameter) {
-            if (parameterList) {
-                for (var i = 0; i < parameterList.length; i++) {
-                    var param = parameterList[i];
-                    if (param.name.kind === 69 /* Identifier */ &&
-                        param.name.text === parameter.text) {
-                        return i;
+            return value;
+            function evaluate(expr) {
+                switch (expr.kind) {
+                    case 192 /* PrefixUnaryExpression */:
+                        var value_1 = evaluate(expr.operand);
+                        if (typeof value_1 === "number") {
+                            switch (expr.operator) {
+                                case 37 /* PlusToken */: return value_1;
+                                case 38 /* MinusToken */: return -value_1;
+                                case 52 /* TildeToken */: return ~value_1;
+                            }
+                        }
+                        break;
+                    case 194 /* BinaryExpression */:
+                        var left = evaluate(expr.left);
+                        var right = evaluate(expr.right);
+                        if (typeof left === "number" && typeof right === "number") {
+                            switch (expr.operatorToken.kind) {
+                                case 49 /* BarToken */: return left | right;
+                                case 48 /* AmpersandToken */: return left & right;
+                                case 46 /* GreaterThanGreaterThanToken */: return left >> right;
+                                case 47 /* GreaterThanGreaterThanGreaterThanToken */: return left >>> right;
+                                case 45 /* LessThanLessThanToken */: return left << right;
+                                case 50 /* CaretToken */: return left ^ right;
+                                case 39 /* AsteriskToken */: return left * right;
+                                case 41 /* SlashToken */: return left / right;
+                                case 37 /* PlusToken */: return left + right;
+                                case 38 /* MinusToken */: return left - right;
+                                case 42 /* PercentToken */: return left % right;
+                            }
+                        }
+                        break;
+                    case 9 /* StringLiteral */:
+                        return expr.text;
+                    case 8 /* NumericLiteral */:
+                        checkGrammarNumericLiteral(expr);
+                        return +expr.text;
+                    case 185 /* ParenthesizedExpression */:
+                        return evaluate(expr.expression);
+                    case 71 /* Identifier */:
+                        return ts.nodeIsMissing(expr) ? 0 : evaluateEnumMember(expr, getSymbolOfNode(member.parent), expr.text);
+                    case 180 /* ElementAccessExpression */:
+                    case 179 /* PropertyAccessExpression */:
+                        if (isConstantMemberAccess(expr)) {
+                            var type = getTypeOfExpression(expr.expression);
+                            if (type.symbol && type.symbol.flags & 384 /* Enum */) {
+                                var name_31 = expr.kind === 179 /* PropertyAccessExpression */ ?
+                                    expr.name.text :
+                                    expr.argumentExpression.text;
+                                return evaluateEnumMember(expr, type.symbol, name_31);
+                            }
+                        }
+                        break;
+                }
+                return undefined;
+            }
+            function evaluateEnumMember(expr, enumSymbol, name) {
+                var memberSymbol = enumSymbol.exports.get(name);
+                if (memberSymbol) {
+                    var declaration = memberSymbol.valueDeclaration;
+                    if (declaration !== member) {
+                        if (isBlockScopedNameDeclaredBeforeUse(declaration, member)) {
+                            return getNodeLinks(declaration).enumMemberValue;
+                        }
+                        error(expr, ts.Diagnostics.A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums);
+                        return 0;
                     }
                 }
+                return undefined;
             }
-            return -1;
         }
-        function checkTypePredicate(node) {
-            var parent = getTypePredicateParent(node);
-            if (!parent) {
-                // The parent must not be valid.
-                error(node, ts.Diagnostics.A_type_predicate_is_only_allowed_in_return_type_position_for_functions_and_methods);
+        function isConstantMemberAccess(node) {
+            return node.kind === 71 /* Identifier */ ||
+                node.kind === 179 /* PropertyAccessExpression */ && isConstantMemberAccess(node.expression) ||
+                node.kind === 180 /* ElementAccessExpression */ && isConstantMemberAccess(node.expression) &&
+                    node.argumentExpression.kind === 9 /* StringLiteral */;
+        }
+        function checkEnumDeclaration(node) {
+            if (!produceDiagnostics) {
                 return;
             }
-            var typePredicate = getSignatureFromDeclaration(parent).typePredicate;
-            if (!typePredicate) {
-                return;
+            // Grammar checking
+            checkGrammarDecorators(node) || checkGrammarModifiers(node);
+            checkTypeNameIsReserved(node.name, ts.Diagnostics.Enum_name_cannot_be_0);
+            checkCollisionWithCapturedThisVariable(node, node.name);
+            checkCollisionWithCapturedNewTargetVariable(node, node.name);
+            checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
+            checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
+            checkExportsOnMergedDeclarations(node);
+            computeEnumMemberValues(node);
+            var enumIsConst = ts.isConst(node);
+            if (compilerOptions.isolatedModules && enumIsConst && ts.isInAmbientContext(node)) {
+                error(node.name, ts.Diagnostics.Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided);
             }
-            var parameterName = node.parameterName;
-            if (ts.isThisTypePredicate(typePredicate)) {
-                getTypeFromThisTypeNode(parameterName);
+            // Spec 2014 - Section 9.3:
+            // It isn't possible for one enum declaration to continue the automatic numbering sequence of another,
+            // and when an enum type has multiple declarations, only one declaration is permitted to omit a value
+            // for the first member.
+            //
+            // Only perform this check once per symbol
+            var enumSymbol = getSymbolOfNode(node);
+            var firstDeclaration = ts.getDeclarationOfKind(enumSymbol, node.kind);
+            if (node === firstDeclaration) {
+                if (enumSymbol.declarations.length > 1) {
+                    // check that const is placed\omitted on all enum declarations
+                    ts.forEach(enumSymbol.declarations, function (decl) {
+                        if (ts.isConstEnumDeclaration(decl) !== enumIsConst) {
+                            error(ts.getNameOfDeclaration(decl), ts.Diagnostics.Enum_declarations_must_all_be_const_or_non_const);
+                        }
+                    });
+                }
+                var seenEnumMissingInitialInitializer_1 = false;
+                ts.forEach(enumSymbol.declarations, function (declaration) {
+                    // return true if we hit a violation of the rule, false otherwise
+                    if (declaration.kind !== 232 /* EnumDeclaration */) {
+                        return false;
+                    }
+                    var enumDeclaration = declaration;
+                    if (!enumDeclaration.members.length) {
+                        return false;
+                    }
+                    var firstEnumMember = enumDeclaration.members[0];
+                    if (!firstEnumMember.initializer) {
+                        if (seenEnumMissingInitialInitializer_1) {
+                            error(firstEnumMember.name, ts.Diagnostics.In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enum_element);
+                        }
+                        else {
+                            seenEnumMissingInitialInitializer_1 = true;
+                        }
+                    }
+                });
+            }
+        }
+        function getFirstNonAmbientClassOrFunctionDeclaration(symbol) {
+            var declarations = symbol.declarations;
+            for (var _i = 0, declarations_8 = declarations; _i < declarations_8.length; _i++) {
+                var declaration = declarations_8[_i];
+                if ((declaration.kind === 229 /* ClassDeclaration */ ||
+                    (declaration.kind === 228 /* FunctionDeclaration */ && ts.nodeIsPresent(declaration.body))) &&
+                    !ts.isInAmbientContext(declaration)) {
+                    return declaration;
+                }
+            }
+            return undefined;
+        }
+        function inSameLexicalScope(node1, node2) {
+            var container1 = ts.getEnclosingBlockScopeContainer(node1);
+            var container2 = ts.getEnclosingBlockScopeContainer(node2);
+            if (isGlobalSourceFile(container1)) {
+                return isGlobalSourceFile(container2);
+            }
+            else if (isGlobalSourceFile(container2)) {
+                return false;
             }
             else {
-                if (typePredicate.parameterIndex >= 0) {
-                    if (parent.parameters[typePredicate.parameterIndex].dotDotDotToken) {
-                        error(parameterName, ts.Diagnostics.A_type_predicate_cannot_reference_a_rest_parameter);
+                return container1 === container2;
+            }
+        }
+        function checkModuleDeclaration(node) {
+            if (produceDiagnostics) {
+                // Grammar checking
+                var isGlobalAugmentation = ts.isGlobalScopeAugmentation(node);
+                var inAmbientContext = ts.isInAmbientContext(node);
+                if (isGlobalAugmentation && !inAmbientContext) {
+                    error(node.name, ts.Diagnostics.Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambient_context);
+                }
+                var isAmbientExternalModule = ts.isAmbientModule(node);
+                var contextErrorMessage = isAmbientExternalModule
+                    ? ts.Diagnostics.An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file
+                    : ts.Diagnostics.A_namespace_declaration_is_only_allowed_in_a_namespace_or_module;
+                if (checkGrammarModuleElementContext(node, contextErrorMessage)) {
+                    // If we hit a module declaration in an illegal context, just bail out to avoid cascading errors.
+                    return;
+                }
+                if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node)) {
+                    if (!inAmbientContext && node.name.kind === 9 /* StringLiteral */) {
+                        grammarErrorOnNode(node.name, ts.Diagnostics.Only_ambient_modules_can_use_quoted_names);
                     }
-                    else {
-                        var leadingError = ts.chainDiagnosticMessages(undefined, ts.Diagnostics.A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type);
-                        checkTypeAssignableTo(typePredicate.type, getTypeOfNode(parent.parameters[typePredicate.parameterIndex]), node.type, 
-                        /*headMessage*/ undefined, leadingError);
+                }
+                if (ts.isIdentifier(node.name)) {
+                    checkCollisionWithCapturedThisVariable(node, node.name);
+                    checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
+                    checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
+                }
+                checkExportsOnMergedDeclarations(node);
+                var symbol = getSymbolOfNode(node);
+                // The following checks only apply on a non-ambient instantiated module declaration.
+                if (symbol.flags & 512 /* ValueModule */
+                    && symbol.declarations.length > 1
+                    && !inAmbientContext
+                    && isInstantiatedModule(node, compilerOptions.preserveConstEnums || compilerOptions.isolatedModules)) {
+                    var firstNonAmbientClassOrFunc = getFirstNonAmbientClassOrFunctionDeclaration(symbol);
+                    if (firstNonAmbientClassOrFunc) {
+                        if (ts.getSourceFileOfNode(node) !== ts.getSourceFileOfNode(firstNonAmbientClassOrFunc)) {
+                            error(node.name, ts.Diagnostics.A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merged);
+                        }
+                        else if (node.pos < firstNonAmbientClassOrFunc.pos) {
+                            error(node.name, ts.Diagnostics.A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged);
+                        }
+                    }
+                    // if the module merges with a class declaration in the same lexical scope,
+                    // we need to track this to ensure the correct emit.
+                    var mergedClass = ts.getDeclarationOfKind(symbol, 229 /* ClassDeclaration */);
+                    if (mergedClass &&
+                        inSameLexicalScope(node, mergedClass)) {
+                        getNodeLinks(node).flags |= 32768 /* LexicalModuleMergesWithClass */;
                     }
                 }
-                else if (parameterName) {
-                    var hasReportedError = false;
-                    for (var _i = 0, _a = parent.parameters; _i < _a.length; _i++) {
-                        var name_18 = _a[_i].name;
-                        if (ts.isBindingPattern(name_18) &&
-                            checkIfTypePredicateVariableIsDeclaredInBindingPattern(name_18, parameterName, typePredicate.parameterName)) {
-                            hasReportedError = true;
-                            break;
+                if (isAmbientExternalModule) {
+                    if (ts.isExternalModuleAugmentation(node)) {
+                        // body of the augmentation should be checked for consistency only if augmentation was applied to its target (either global scope or module)
+                        // otherwise we'll be swamped in cascading errors.
+                        // We can detect if augmentation was applied using following rules:
+                        // - augmentation for a global scope is always applied
+                        // - augmentation for some external module is applied if symbol for augmentation is merged (it was combined with target module).
+                        var checkBody = isGlobalAugmentation || (getSymbolOfNode(node).flags & 134217728 /* Transient */);
+                        if (checkBody && node.body) {
+                            // body of ambient external module is always a module block
+                            for (var _i = 0, _a = node.body.statements; _i < _a.length; _i++) {
+                                var statement = _a[_i];
+                                checkModuleAugmentationElement(statement, isGlobalAugmentation);
+                            }
                         }
                     }
-                    if (!hasReportedError) {
-                        error(node.parameterName, ts.Diagnostics.Cannot_find_parameter_0, typePredicate.parameterName);
+                    else if (isGlobalSourceFile(node.parent)) {
+                        if (isGlobalAugmentation) {
+                            error(node.name, ts.Diagnostics.Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations);
+                        }
+                        else if (ts.isExternalModuleNameRelative(node.name.text)) {
+                            error(node.name, ts.Diagnostics.Ambient_module_declaration_cannot_specify_relative_module_name);
+                        }
+                    }
+                    else {
+                        if (isGlobalAugmentation) {
+                            error(node.name, ts.Diagnostics.Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations);
+                        }
+                        else {
+                            // Node is not an augmentation and is not located on the script level.
+                            // This means that this is declaration of ambient module that is located in other module or namespace which is prohibited.
+                            error(node.name, ts.Diagnostics.Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces);
+                        }
                     }
                 }
             }
+            if (node.body) {
+                checkSourceElement(node.body);
+                if (!ts.isGlobalScopeAugmentation(node)) {
+                    registerForUnusedIdentifiersCheck(node);
+                }
+            }
         }
-        function getTypePredicateParent(node) {
-            switch (node.parent.kind) {
-                case 180 /* ArrowFunction */:
-                case 151 /* CallSignature */:
-                case 220 /* FunctionDeclaration */:
-                case 179 /* FunctionExpression */:
-                case 156 /* FunctionType */:
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                    var parent_12 = node.parent;
-                    if (node === parent_12.type) {
-                        return parent_12;
+        function checkModuleAugmentationElement(node, isGlobalAugmentation) {
+            switch (node.kind) {
+                case 208 /* VariableStatement */:
+                    // error each individual name in variable statement instead of marking the entire variable statement
+                    for (var _i = 0, _a = node.declarationList.declarations; _i < _a.length; _i++) {
+                        var decl = _a[_i];
+                        checkModuleAugmentationElement(decl, isGlobalAugmentation);
+                    }
+                    break;
+                case 243 /* ExportAssignment */:
+                case 244 /* ExportDeclaration */:
+                    grammarErrorOnFirstToken(node, ts.Diagnostics.Exports_and_export_assignments_are_not_permitted_in_module_augmentations);
+                    break;
+                case 237 /* ImportEqualsDeclaration */:
+                case 238 /* ImportDeclaration */:
+                    grammarErrorOnFirstToken(node, ts.Diagnostics.Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_module);
+                    break;
+                case 176 /* BindingElement */:
+                case 226 /* VariableDeclaration */:
+                    var name_32 = node.name;
+                    if (ts.isBindingPattern(name_32)) {
+                        for (var _b = 0, _c = name_32.elements; _b < _c.length; _b++) {
+                            var el = _c[_b];
+                            // mark individual names in binding pattern
+                            checkModuleAugmentationElement(el, isGlobalAugmentation);
+                        }
+                        break;
+                    }
+                // falls through
+                case 229 /* ClassDeclaration */:
+                case 232 /* EnumDeclaration */:
+                case 228 /* FunctionDeclaration */:
+                case 230 /* InterfaceDeclaration */:
+                case 233 /* ModuleDeclaration */:
+                case 231 /* TypeAliasDeclaration */:
+                    if (isGlobalAugmentation) {
+                        return;
+                    }
+                    var symbol = getSymbolOfNode(node);
+                    if (symbol) {
+                        // module augmentations cannot introduce new names on the top level scope of the module
+                        // this is done it two steps
+                        // 1. quick check - if symbol for node is not merged - this is local symbol to this augmentation - report error
+                        // 2. main check - report error if value declaration of the parent symbol is module augmentation)
+                        var reportError = !(symbol.flags & 134217728 /* Transient */);
+                        if (!reportError) {
+                            // symbol should not originate in augmentation
+                            reportError = ts.isExternalModuleAugmentation(symbol.parent.declarations[0]);
+                        }
                     }
+                    break;
+            }
+        }
+        function getFirstIdentifier(node) {
+            switch (node.kind) {
+                case 71 /* Identifier */:
+                    return node;
+                case 143 /* QualifiedName */:
+                    do {
+                        node = node.left;
+                    } while (node.kind !== 71 /* Identifier */);
+                    return node;
+                case 179 /* PropertyAccessExpression */:
+                    do {
+                        node = node.expression;
+                    } while (node.kind !== 71 /* Identifier */);
+                    return node;
+            }
+        }
+        function checkExternalImportOrExportDeclaration(node) {
+            var moduleName = ts.getExternalModuleName(node);
+            if (!ts.nodeIsMissing(moduleName) && moduleName.kind !== 9 /* StringLiteral */) {
+                error(moduleName, ts.Diagnostics.String_literal_expected);
+                return false;
+            }
+            var inAmbientExternalModule = node.parent.kind === 234 /* ModuleBlock */ && ts.isAmbientModule(node.parent.parent);
+            if (node.parent.kind !== 265 /* SourceFile */ && !inAmbientExternalModule) {
+                error(moduleName, node.kind === 244 /* ExportDeclaration */ ?
+                    ts.Diagnostics.Export_declarations_are_not_permitted_in_a_namespace :
+                    ts.Diagnostics.Import_declarations_in_a_namespace_cannot_reference_a_module);
+                return false;
+            }
+            if (inAmbientExternalModule && ts.isExternalModuleNameRelative(moduleName.text)) {
+                // we have already reported errors on top level imports\exports in external module augmentations in checkModuleDeclaration
+                // no need to do this again.
+                if (!isTopLevelInExternalModuleAugmentation(node)) {
+                    // TypeScript 1.0 spec (April 2013): 12.1.6
+                    // An ExternalImportDeclaration in an AmbientExternalModuleDeclaration may reference
+                    // other external modules only through top - level external module names.
+                    // Relative external module names are not permitted.
+                    error(node, ts.Diagnostics.Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relative_module_name);
+                    return false;
+                }
             }
+            return true;
         }
-        function checkIfTypePredicateVariableIsDeclaredInBindingPattern(pattern, predicateVariableNode, predicateVariableName) {
-            for (var _i = 0, _a = pattern.elements; _i < _a.length; _i++) {
-                var element = _a[_i];
-                if (ts.isOmittedExpression(element)) {
-                    continue;
-                }
-                var name_19 = element.name;
-                if (name_19.kind === 69 /* Identifier */ &&
-                    name_19.text === predicateVariableName) {
-                    error(predicateVariableNode, ts.Diagnostics.A_type_predicate_cannot_reference_element_0_in_a_binding_pattern, predicateVariableName);
-                    return true;
+        function checkAliasSymbol(node) {
+            var symbol = getSymbolOfNode(node);
+            var target = resolveAlias(symbol);
+            if (target !== unknownSymbol) {
+                // For external modules symbol represent local symbol for an alias.
+                // This local symbol will merge any other local declarations (excluding other aliases)
+                // and symbol.flags will contains combined representation for all merged declaration.
+                // Based on symbol.flags we can compute a set of excluded meanings (meaning that resolved alias should not have,
+                // otherwise it will conflict with some local declaration). Note that in addition to normal flags we include matching SymbolFlags.Export*
+                // in order to prevent collisions with declarations that were exported from the current module (they still contribute to local names).
+                var excludedMeanings = (symbol.flags & (107455 /* Value */ | 1048576 /* ExportValue */) ? 107455 /* Value */ : 0) |
+                    (symbol.flags & 793064 /* Type */ ? 793064 /* Type */ : 0) |
+                    (symbol.flags & 1920 /* Namespace */ ? 1920 /* Namespace */ : 0);
+                if (target.flags & excludedMeanings) {
+                    var message = node.kind === 246 /* ExportSpecifier */ ?
+                        ts.Diagnostics.Export_declaration_conflicts_with_exported_declaration_of_0 :
+                        ts.Diagnostics.Import_declaration_conflicts_with_local_declaration_of_0;
+                    error(node, message, symbolToString(symbol));
                 }
-                else if (name_19.kind === 168 /* ArrayBindingPattern */ ||
-                    name_19.kind === 167 /* ObjectBindingPattern */) {
-                    if (checkIfTypePredicateVariableIsDeclaredInBindingPattern(name_19, predicateVariableNode, predicateVariableName)) {
-                        return true;
-                    }
+                // Don't allow to re-export something with no value side when `--isolatedModules` is set.
+                if (compilerOptions.isolatedModules
+                    && node.kind === 246 /* ExportSpecifier */
+                    && !(target.flags & 107455 /* Value */)
+                    && !ts.isInAmbientContext(node)) {
+                    error(node, ts.Diagnostics.Cannot_re_export_a_type_when_the_isolatedModules_flag_is_provided);
                 }
             }
         }
-        function checkSignatureDeclaration(node) {
-            // Grammar checking
-            if (node.kind === 153 /* IndexSignature */) {
-                checkGrammarIndexSignature(node);
-            }
-            else if (node.kind === 156 /* FunctionType */ || node.kind === 220 /* FunctionDeclaration */ || node.kind === 157 /* ConstructorType */ ||
-                node.kind === 151 /* CallSignature */ || node.kind === 148 /* Constructor */ ||
-                node.kind === 152 /* ConstructSignature */) {
-                checkGrammarFunctionLikeDeclaration(node);
+        function checkImportBinding(node) {
+            checkCollisionWithCapturedThisVariable(node, node.name);
+            checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
+            checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
+            checkAliasSymbol(node);
+        }
+        function checkImportDeclaration(node) {
+            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_import_declaration_can_only_be_used_in_a_namespace_or_module)) {
+                // If we hit an import declaration in an illegal context, just bail out to avoid cascading errors.
+                return;
             }
-            checkTypeParameters(node.typeParameters);
-            ts.forEach(node.parameters, checkParameter);
-            if (node.type) {
-                checkSourceElement(node.type);
+            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && ts.getModifierFlags(node) !== 0) {
+                grammarErrorOnFirstToken(node, ts.Diagnostics.An_import_declaration_cannot_have_modifiers);
             }
-            if (produceDiagnostics) {
-                checkCollisionWithArgumentsInGeneratedCode(node);
-                if (compilerOptions.noImplicitAny && !node.type) {
-                    switch (node.kind) {
-                        case 152 /* ConstructSignature */:
-                            error(node, ts.Diagnostics.Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type);
-                            break;
-                        case 151 /* CallSignature */:
-                            error(node, ts.Diagnostics.Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type);
-                            break;
+            if (checkExternalImportOrExportDeclaration(node)) {
+                var importClause = node.importClause;
+                if (importClause) {
+                    if (importClause.name) {
+                        checkImportBinding(importClause);
                     }
-                }
-                if (node.type) {
-                    if (languageVersion >= 2 /* ES6 */ && isSyntacticallyValidGenerator(node)) {
-                        var returnType = getTypeFromTypeNode(node.type);
-                        if (returnType === voidType) {
-                            error(node.type, ts.Diagnostics.A_generator_cannot_have_a_void_type_annotation);
+                    if (importClause.namedBindings) {
+                        if (importClause.namedBindings.kind === 240 /* NamespaceImport */) {
+                            checkImportBinding(importClause.namedBindings);
                         }
                         else {
-                            var generatorElementType = getElementTypeOfIterableIterator(returnType) || anyType;
-                            var iterableIteratorInstantiation = createIterableIteratorType(generatorElementType);
-                            // Naively, one could check that IterableIterator<any> is assignable to the return type annotation.
-                            // However, that would not catch the error in the following case.
-                            //
-                            //    interface BadGenerator extends Iterable<number>, Iterator<string> { }
-                            //    function* g(): BadGenerator { } // Iterable and Iterator have different types!
-                            //
-                            checkTypeAssignableTo(iterableIteratorInstantiation, returnType, node.type);
+                            ts.forEach(importClause.namedBindings.elements, checkImportBinding);
                         }
                     }
-                    else if (ts.isAsyncFunctionLike(node)) {
-                        checkAsyncFunctionReturnType(node);
-                    }
-                }
-                if (noUnusedIdentifiers && !node.body) {
-                    checkUnusedTypeParameters(node);
                 }
             }
         }
-        function checkClassForDuplicateDeclarations(node) {
-            var Accessor;
-            (function (Accessor) {
-                Accessor[Accessor["Getter"] = 1] = "Getter";
-                Accessor[Accessor["Setter"] = 2] = "Setter";
-                Accessor[Accessor["Property"] = 3] = "Property";
-            })(Accessor || (Accessor = {}));
-            var instanceNames = ts.createMap();
-            var staticNames = ts.createMap();
-            for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
-                var member = _a[_i];
-                if (member.kind === 148 /* Constructor */) {
-                    for (var _b = 0, _c = member.parameters; _b < _c.length; _b++) {
-                        var param = _c[_b];
-                        if (ts.isParameterPropertyDeclaration(param)) {
-                            addName(instanceNames, param.name, param.name.text, 3 /* Property */);
+        function checkImportEqualsDeclaration(node) {
+            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_import_declaration_can_only_be_used_in_a_namespace_or_module)) {
+                // If we hit an import declaration in an illegal context, just bail out to avoid cascading errors.
+                return;
+            }
+            checkGrammarDecorators(node) || checkGrammarModifiers(node);
+            if (ts.isInternalModuleImportEqualsDeclaration(node) || checkExternalImportOrExportDeclaration(node)) {
+                checkImportBinding(node);
+                if (ts.getModifierFlags(node) & 1 /* Export */) {
+                    markExportAsReferenced(node);
+                }
+                if (ts.isInternalModuleImportEqualsDeclaration(node)) {
+                    var target = resolveAlias(getSymbolOfNode(node));
+                    if (target !== unknownSymbol) {
+                        if (target.flags & 107455 /* Value */) {
+                            // Target is a value symbol, check that it is not hidden by a local declaration with the same name
+                            var moduleName = getFirstIdentifier(node.moduleReference);
+                            if (!(resolveEntityName(moduleName, 107455 /* Value */ | 1920 /* Namespace */).flags & 1920 /* Namespace */)) {
+                                error(moduleName, ts.Diagnostics.Module_0_is_hidden_by_a_local_declaration_with_the_same_name, ts.declarationNameToString(moduleName));
+                            }
+                        }
+                        if (target.flags & 793064 /* Type */) {
+                            checkTypeNameIsReserved(node.name, ts.Diagnostics.Import_name_cannot_be_0);
                         }
                     }
                 }
                 else {
-                    var isStatic = ts.forEach(member.modifiers, function (m) { return m.kind === 113 /* StaticKeyword */; });
-                    var names = isStatic ? staticNames : instanceNames;
-                    var memberName = member.name && ts.getPropertyNameForPropertyNameNode(member.name);
-                    if (memberName) {
-                        switch (member.kind) {
-                            case 149 /* GetAccessor */:
-                                addName(names, member.name, memberName, 1 /* Getter */);
-                                break;
-                            case 150 /* SetAccessor */:
-                                addName(names, member.name, memberName, 2 /* Setter */);
-                                break;
-                            case 145 /* PropertyDeclaration */:
-                                addName(names, member.name, memberName, 3 /* Property */);
-                                break;
-                        }
+                    if (modulekind === ts.ModuleKind.ES2015 && !ts.isInAmbientContext(node)) {
+                        // Import equals declaration is deprecated in es6 or above
+                        grammarErrorOnNode(node, ts.Diagnostics.Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead);
                     }
                 }
             }
-            function addName(names, location, name, meaning) {
-                var prev = names[name];
-                if (prev) {
-                    if (prev & meaning) {
-                        error(location, ts.Diagnostics.Duplicate_identifier_0, ts.getTextOfNode(location));
-                    }
-                    else {
-                        names[name] = prev | meaning;
+        }
+        function checkExportDeclaration(node) {
+            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_export_declaration_can_only_be_used_in_a_module)) {
+                // If we hit an export in an illegal context, just bail out to avoid cascading errors.
+                return;
+            }
+            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && ts.getModifierFlags(node) !== 0) {
+                grammarErrorOnFirstToken(node, ts.Diagnostics.An_export_declaration_cannot_have_modifiers);
+            }
+            if (!node.moduleSpecifier || checkExternalImportOrExportDeclaration(node)) {
+                if (node.exportClause) {
+                    // export { x, y }
+                    // export { x, y } from "foo"
+                    ts.forEach(node.exportClause.elements, checkExportSpecifier);
+                    var inAmbientExternalModule = node.parent.kind === 234 /* ModuleBlock */ && ts.isAmbientModule(node.parent.parent);
+                    var inAmbientNamespaceDeclaration = !inAmbientExternalModule && node.parent.kind === 234 /* ModuleBlock */ &&
+                        !node.moduleSpecifier && ts.isInAmbientContext(node);
+                    if (node.parent.kind !== 265 /* SourceFile */ && !inAmbientExternalModule && !inAmbientNamespaceDeclaration) {
+                        error(node, ts.Diagnostics.Export_declarations_are_not_permitted_in_a_namespace);
                     }
                 }
                 else {
-                    names[name] = meaning;
-                }
-            }
-        }
-        function checkObjectTypeForDuplicateDeclarations(node) {
-            var names = ts.createMap();
-            for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
-                var member = _a[_i];
-                if (member.kind == 144 /* PropertySignature */) {
-                    var memberName = void 0;
-                    switch (member.name.kind) {
-                        case 9 /* StringLiteral */:
-                        case 8 /* NumericLiteral */:
-                        case 69 /* Identifier */:
-                            memberName = member.name.text;
-                            break;
-                        default:
-                            continue;
-                    }
-                    if (names[memberName]) {
-                        error(member.symbol.valueDeclaration.name, ts.Diagnostics.Duplicate_identifier_0, memberName);
-                        error(member.name, ts.Diagnostics.Duplicate_identifier_0, memberName);
+                    // export * from "foo"
+                    var moduleSymbol = resolveExternalModuleName(node, node.moduleSpecifier);
+                    if (moduleSymbol && hasExportAssignmentSymbol(moduleSymbol)) {
+                        error(node.moduleSpecifier, ts.Diagnostics.Module_0_uses_export_and_cannot_be_used_with_export_Asterisk, symbolToString(moduleSymbol));
                     }
-                    else {
-                        names[memberName] = true;
+                    if (modulekind !== ts.ModuleKind.System && modulekind !== ts.ModuleKind.ES2015) {
+                        checkExternalEmitHelpers(node, 32768 /* ExportStar */);
                     }
                 }
             }
         }
-        function checkTypeForDuplicateIndexSignatures(node) {
-            if (node.kind === 222 /* InterfaceDeclaration */) {
-                var nodeSymbol = getSymbolOfNode(node);
-                // in case of merging interface declaration it is possible that we'll enter this check procedure several times for every declaration
-                // to prevent this run check only for the first declaration of a given kind
-                if (nodeSymbol.declarations.length > 0 && nodeSymbol.declarations[0] !== node) {
-                    return;
-                }
-            }
-            // TypeScript 1.0 spec (April 2014)
-            // 3.7.4: An object type can contain at most one string index signature and one numeric index signature.
-            // 8.5: A class declaration can have at most one string index member declaration and one numeric index member declaration
-            var indexSymbol = getIndexSymbol(getSymbolOfNode(node));
-            if (indexSymbol) {
-                var seenNumericIndexer = false;
-                var seenStringIndexer = false;
-                for (var _i = 0, _a = indexSymbol.declarations; _i < _a.length; _i++) {
-                    var decl = _a[_i];
-                    var declaration = decl;
-                    if (declaration.parameters.length === 1 && declaration.parameters[0].type) {
-                        switch (declaration.parameters[0].type.kind) {
-                            case 132 /* StringKeyword */:
-                                if (!seenStringIndexer) {
-                                    seenStringIndexer = true;
-                                }
-                                else {
-                                    error(declaration, ts.Diagnostics.Duplicate_string_index_signature);
-                                }
-                                break;
-                            case 130 /* NumberKeyword */:
-                                if (!seenNumericIndexer) {
-                                    seenNumericIndexer = true;
-                                }
-                                else {
-                                    error(declaration, ts.Diagnostics.Duplicate_number_index_signature);
-                                }
-                                break;
-                        }
-                    }
-                }
+        function checkGrammarModuleElementContext(node, errorMessage) {
+            var isInAppropriateContext = node.parent.kind === 265 /* SourceFile */ || node.parent.kind === 234 /* ModuleBlock */ || node.parent.kind === 233 /* ModuleDeclaration */;
+            if (!isInAppropriateContext) {
+                grammarErrorOnFirstToken(node, errorMessage);
             }
+            return !isInAppropriateContext;
         }
-        function checkPropertyDeclaration(node) {
-            // Grammar checking
-            checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarProperty(node) || checkGrammarComputedPropertyName(node.name);
-            checkVariableLikeDeclaration(node);
-        }
-        function checkMethodDeclaration(node) {
-            // Grammar checking
-            checkGrammarMethod(node) || checkGrammarComputedPropertyName(node.name);
-            // Grammar checking for modifiers is done inside the function checkGrammarFunctionLikeDeclaration
-            checkFunctionOrMethodDeclaration(node);
-            // Abstract methods cannot have an implementation.
-            // Extra checks are to avoid reporting multiple errors relating to the "abstractness" of the node.
-            if (ts.getModifierFlags(node) & 128 /* Abstract */ && node.body) {
-                error(node, ts.Diagnostics.Method_0_cannot_have_an_implementation_because_it_is_marked_abstract, ts.declarationNameToString(node.name));
+        function checkExportSpecifier(node) {
+            checkAliasSymbol(node);
+            if (!node.parent.parent.moduleSpecifier) {
+                var exportedName = node.propertyName || node.name;
+                // find immediate value referenced by exported name (SymbolFlags.Alias is set so we don't chase down aliases)
+                var symbol = resolveName(exportedName, exportedName.text, 107455 /* Value */ | 793064 /* Type */ | 1920 /* Namespace */ | 8388608 /* Alias */, 
+                /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined);
+                if (symbol && (symbol === undefinedSymbol || isGlobalSourceFile(getDeclarationContainer(symbol.declarations[0])))) {
+                    error(exportedName, ts.Diagnostics.Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module, exportedName.text);
+                }
+                else {
+                    markExportAsReferenced(node);
+                }
             }
         }
-        function checkConstructorDeclaration(node) {
-            // Grammar check on signature of constructor and modifier of the constructor is done in checkSignatureDeclaration function.
-            checkSignatureDeclaration(node);
-            // Grammar check for checking only related to constructorDeclaration
-            checkGrammarConstructorTypeParameters(node) || checkGrammarConstructorTypeAnnotation(node);
-            checkSourceElement(node.body);
-            registerForUnusedIdentifiersCheck(node);
-            var symbol = getSymbolOfNode(node);
-            var firstDeclaration = ts.getDeclarationOfKind(symbol, node.kind);
-            // Only type check the symbol once
-            if (node === firstDeclaration) {
-                checkFunctionOrConstructorSymbol(symbol);
-            }
-            // exit early in the case of signature - super checks are not relevant to them
-            if (ts.nodeIsMissing(node.body)) {
+        function checkExportAssignment(node) {
+            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_export_assignment_can_only_be_used_in_a_module)) {
+                // If we hit an export assignment in an illegal context, just bail out to avoid cascading errors.
                 return;
             }
-            if (!produceDiagnostics) {
+            var container = node.parent.kind === 265 /* SourceFile */ ? node.parent : node.parent.parent;
+            if (container.kind === 233 /* ModuleDeclaration */ && !ts.isAmbientModule(container)) {
+                if (node.isExportEquals) {
+                    error(node, ts.Diagnostics.An_export_assignment_cannot_be_used_in_a_namespace);
+                }
+                else {
+                    error(node, ts.Diagnostics.A_default_export_can_only_be_used_in_an_ECMAScript_style_module);
+                }
                 return;
             }
-            function containsSuperCallAsComputedPropertyName(n) {
-                return n.name && containsSuperCall(n.name);
+            // Grammar checking
+            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && ts.getModifierFlags(node) !== 0) {
+                grammarErrorOnFirstToken(node, ts.Diagnostics.An_export_assignment_cannot_have_modifiers);
             }
-            function containsSuperCall(n) {
-                if (ts.isSuperCallExpression(n)) {
-                    return true;
-                }
-                else if (ts.isFunctionLike(n)) {
-                    return false;
-                }
-                else if (ts.isClassLike(n)) {
-                    return ts.forEach(n.members, containsSuperCallAsComputedPropertyName);
-                }
-                return ts.forEachChild(n, containsSuperCall);
+            if (node.expression.kind === 71 /* Identifier */) {
+                markExportAsReferenced(node);
             }
-            function markThisReferencesAsErrors(n) {
-                if (n.kind === 97 /* ThisKeyword */) {
-                    error(n, ts.Diagnostics.this_cannot_be_referenced_in_current_location);
+            else {
+                checkExpressionCached(node.expression);
+            }
+            checkExternalModuleExports(container);
+            if (node.isExportEquals && !ts.isInAmbientContext(node)) {
+                if (modulekind === ts.ModuleKind.ES2015) {
+                    // export assignment is not supported in es6 modules
+                    grammarErrorOnNode(node, ts.Diagnostics.Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_or_another_module_format_instead);
                 }
-                else if (n.kind !== 179 /* FunctionExpression */ && n.kind !== 220 /* FunctionDeclaration */) {
-                    ts.forEachChild(n, markThisReferencesAsErrors);
+                else if (modulekind === ts.ModuleKind.System) {
+                    // system modules does not support export assignment
+                    grammarErrorOnNode(node, ts.Diagnostics.Export_assignment_is_not_supported_when_module_flag_is_system);
                 }
             }
-            function isInstancePropertyWithInitializer(n) {
-                return n.kind === 145 /* PropertyDeclaration */ &&
-                    !(ts.getModifierFlags(n) & 32 /* Static */) &&
-                    !!n.initializer;
-            }
-            // TS 1.0 spec (April 2014): 8.3.2
-            // Constructors of classes with no extends clause may not contain super calls, whereas
-            // constructors of derived classes must contain at least one super call somewhere in their function body.
-            var containingClassDecl = node.parent;
-            if (ts.getClassExtendsHeritageClauseElement(containingClassDecl)) {
-                captureLexicalThis(node.parent, containingClassDecl);
-                var classExtendsNull = classDeclarationExtendsNull(containingClassDecl);
-                var superCall = getSuperCallInConstructor(node);
-                if (superCall) {
-                    if (classExtendsNull) {
-                        error(superCall, ts.Diagnostics.A_constructor_cannot_contain_a_super_call_when_its_class_extends_null);
+        }
+        function hasExportedMembers(moduleSymbol) {
+            return ts.forEachEntry(moduleSymbol.exports, function (_, id) { return id !== "export="; });
+        }
+        function checkExternalModuleExports(node) {
+            var moduleSymbol = getSymbolOfNode(node);
+            var links = getSymbolLinks(moduleSymbol);
+            if (!links.exportsChecked) {
+                var exportEqualsSymbol = moduleSymbol.exports.get("export=");
+                if (exportEqualsSymbol && hasExportedMembers(moduleSymbol)) {
+                    var declaration = getDeclarationOfAliasSymbol(exportEqualsSymbol) || exportEqualsSymbol.valueDeclaration;
+                    if (!isTopLevelInExternalModuleAugmentation(declaration)) {
+                        error(declaration, ts.Diagnostics.An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements);
                     }
-                    // The first statement in the body of a constructor (excluding prologue directives) must be a super call
-                    // if both of the following are true:
-                    // - The containing class is a derived class.
-                    // - The constructor declares parameter properties
-                    //   or the containing class declares instance member variables with initializers.
-                    var superCallShouldBeFirst = ts.forEach(node.parent.members, isInstancePropertyWithInitializer) ||
-                        ts.forEach(node.parameters, function (p) { return ts.getModifierFlags(p) & 92 /* ParameterPropertyModifier */; });
-                    // Skip past any prologue directives to find the first statement
-                    // to ensure that it was a super call.
-                    if (superCallShouldBeFirst) {
-                        var statements = node.body.statements;
-                        var superCallStatement = void 0;
-                        for (var _i = 0, statements_2 = statements; _i < statements_2.length; _i++) {
-                            var statement = statements_2[_i];
-                            if (statement.kind === 202 /* ExpressionStatement */ && ts.isSuperCallExpression(statement.expression)) {
-                                superCallStatement = statement;
-                                break;
-                            }
-                            if (!ts.isPrologueDirective(statement)) {
-                                break;
+                }
+                // Checks for export * conflicts
+                var exports = getExportsOfModule(moduleSymbol);
+                exports && exports.forEach(function (_a, id) {
+                    var declarations = _a.declarations, flags = _a.flags;
+                    if (id === "__export") {
+                        return;
+                    }
+                    // ECMA262: 15.2.1.1 It is a Syntax Error if the ExportedNames of ModuleItemList contains any duplicate entries.
+                    // (TS Exceptions: namespaces, function overloads, enums, and interfaces)
+                    if (flags & (1920 /* Namespace */ | 64 /* Interface */ | 384 /* Enum */)) {
+                        return;
+                    }
+                    var exportedDeclarationsCount = ts.countWhere(declarations, isNotOverload);
+                    if (flags & 524288 /* TypeAlias */ && exportedDeclarationsCount <= 2) {
+                        // it is legal to merge type alias with other values
+                        // so count should be either 1 (just type alias) or 2 (type alias + merged value)
+                        return;
+                    }
+                    if (exportedDeclarationsCount > 1) {
+                        for (var _i = 0, declarations_9 = declarations; _i < declarations_9.length; _i++) {
+                            var declaration = declarations_9[_i];
+                            if (isNotOverload(declaration)) {
+                                diagnostics.add(ts.createDiagnosticForNode(declaration, ts.Diagnostics.Cannot_redeclare_exported_variable_0, id));
                             }
                         }
-                        if (!superCallStatement) {
-                            error(node, ts.Diagnostics.A_super_call_must_be_the_first_statement_in_the_constructor_when_a_class_contains_initialized_properties_or_has_parameter_properties);
-                        }
                     }
+                });
+                links.exportsChecked = true;
+            }
+            function isNotOverload(declaration) {
+                return (declaration.kind !== 228 /* FunctionDeclaration */ && declaration.kind !== 151 /* MethodDeclaration */) ||
+                    !!declaration.body;
+            }
+        }
+        function checkSourceElement(node) {
+            if (!node) {
+                return;
+            }
+            var kind = node.kind;
+            if (cancellationToken) {
+                // Only bother checking on a few construct kinds.  We don't want to be excessively
+                // hitting the cancellation token on every node we check.
+                switch (kind) {
+                    case 233 /* ModuleDeclaration */:
+                    case 229 /* ClassDeclaration */:
+                    case 230 /* InterfaceDeclaration */:
+                    case 228 /* FunctionDeclaration */:
+                        cancellationToken.throwIfCancellationRequested();
                 }
-                else if (!classExtendsNull) {
-                    error(node, ts.Diagnostics.Constructors_for_derived_classes_must_contain_a_super_call);
+            }
+            switch (kind) {
+                case 145 /* TypeParameter */:
+                    return checkTypeParameter(node);
+                case 146 /* Parameter */:
+                    return checkParameter(node);
+                case 149 /* PropertyDeclaration */:
+                case 148 /* PropertySignature */:
+                    return checkPropertyDeclaration(node);
+                case 160 /* FunctionType */:
+                case 161 /* ConstructorType */:
+                case 155 /* CallSignature */:
+                case 156 /* ConstructSignature */:
+                    return checkSignatureDeclaration(node);
+                case 157 /* IndexSignature */:
+                    return checkSignatureDeclaration(node);
+                case 151 /* MethodDeclaration */:
+                case 150 /* MethodSignature */:
+                    return checkMethodDeclaration(node);
+                case 152 /* Constructor */:
+                    return checkConstructorDeclaration(node);
+                case 153 /* GetAccessor */:
+                case 154 /* SetAccessor */:
+                    return checkAccessorDeclaration(node);
+                case 159 /* TypeReference */:
+                    return checkTypeReferenceNode(node);
+                case 158 /* TypePredicate */:
+                    return checkTypePredicate(node);
+                case 162 /* TypeQuery */:
+                    return checkTypeQuery(node);
+                case 163 /* TypeLiteral */:
+                    return checkTypeLiteral(node);
+                case 164 /* ArrayType */:
+                    return checkArrayType(node);
+                case 165 /* TupleType */:
+                    return checkTupleType(node);
+                case 166 /* UnionType */:
+                case 167 /* IntersectionType */:
+                    return checkUnionOrIntersectionType(node);
+                case 168 /* ParenthesizedType */:
+                case 170 /* TypeOperator */:
+                    return checkSourceElement(node.type);
+                case 171 /* IndexedAccessType */:
+                    return checkIndexedAccessType(node);
+                case 172 /* MappedType */:
+                    return checkMappedType(node);
+                case 228 /* FunctionDeclaration */:
+                    return checkFunctionDeclaration(node);
+                case 207 /* Block */:
+                case 234 /* ModuleBlock */:
+                    return checkBlock(node);
+                case 208 /* VariableStatement */:
+                    return checkVariableStatement(node);
+                case 210 /* ExpressionStatement */:
+                    return checkExpressionStatement(node);
+                case 211 /* IfStatement */:
+                    return checkIfStatement(node);
+                case 212 /* DoStatement */:
+                    return checkDoStatement(node);
+                case 213 /* WhileStatement */:
+                    return checkWhileStatement(node);
+                case 214 /* ForStatement */:
+                    return checkForStatement(node);
+                case 215 /* ForInStatement */:
+                    return checkForInStatement(node);
+                case 216 /* ForOfStatement */:
+                    return checkForOfStatement(node);
+                case 217 /* ContinueStatement */:
+                case 218 /* BreakStatement */:
+                    return checkBreakOrContinueStatement(node);
+                case 219 /* ReturnStatement */:
+                    return checkReturnStatement(node);
+                case 220 /* WithStatement */:
+                    return checkWithStatement(node);
+                case 221 /* SwitchStatement */:
+                    return checkSwitchStatement(node);
+                case 222 /* LabeledStatement */:
+                    return checkLabeledStatement(node);
+                case 223 /* ThrowStatement */:
+                    return checkThrowStatement(node);
+                case 224 /* TryStatement */:
+                    return checkTryStatement(node);
+                case 226 /* VariableDeclaration */:
+                    return checkVariableDeclaration(node);
+                case 176 /* BindingElement */:
+                    return checkBindingElement(node);
+                case 229 /* ClassDeclaration */:
+                    return checkClassDeclaration(node);
+                case 230 /* InterfaceDeclaration */:
+                    return checkInterfaceDeclaration(node);
+                case 231 /* TypeAliasDeclaration */:
+                    return checkTypeAliasDeclaration(node);
+                case 232 /* EnumDeclaration */:
+                    return checkEnumDeclaration(node);
+                case 233 /* ModuleDeclaration */:
+                    return checkModuleDeclaration(node);
+                case 238 /* ImportDeclaration */:
+                    return checkImportDeclaration(node);
+                case 237 /* ImportEqualsDeclaration */:
+                    return checkImportEqualsDeclaration(node);
+                case 244 /* ExportDeclaration */:
+                    return checkExportDeclaration(node);
+                case 243 /* ExportAssignment */:
+                    return checkExportAssignment(node);
+                case 209 /* EmptyStatement */:
+                    checkGrammarStatementInAmbientContext(node);
+                    return;
+                case 225 /* DebuggerStatement */:
+                    checkGrammarStatementInAmbientContext(node);
+                    return;
+                case 247 /* MissingDeclaration */:
+                    return checkMissingDeclaration(node);
+            }
+        }
+        // Function and class expression bodies are checked after all statements in the enclosing body. This is
+        // to ensure constructs like the following are permitted:
+        //     const foo = function () {
+        //        const s = foo();
+        //        return "hello";
+        //     }
+        // Here, performing a full type check of the body of the function expression whilst in the process of
+        // determining the type of foo would cause foo to be given type any because of the recursive reference.
+        // Delaying the type check of the body ensures foo has been assigned a type.
+        function checkNodeDeferred(node) {
+            if (deferredNodes) {
+                deferredNodes.push(node);
+            }
+        }
+        function checkDeferredNodes() {
+            for (var _i = 0, deferredNodes_1 = deferredNodes; _i < deferredNodes_1.length; _i++) {
+                var node = deferredNodes_1[_i];
+                switch (node.kind) {
+                    case 186 /* FunctionExpression */:
+                    case 187 /* ArrowFunction */:
+                    case 151 /* MethodDeclaration */:
+                    case 150 /* MethodSignature */:
+                        checkFunctionExpressionOrObjectLiteralMethodDeferred(node);
+                        break;
+                    case 153 /* GetAccessor */:
+                    case 154 /* SetAccessor */:
+                        checkAccessorDeclaration(node);
+                        break;
+                    case 199 /* ClassExpression */:
+                        checkClassExpressionDeferred(node);
+                        break;
                 }
             }
         }
-        function checkAccessorDeclaration(node) {
-            if (produceDiagnostics) {
-                // Grammar checking accessors
-                checkGrammarFunctionLikeDeclaration(node) || checkGrammarAccessor(node) || checkGrammarComputedPropertyName(node.name);
-                checkDecorators(node);
-                checkSignatureDeclaration(node);
-                if (node.kind === 149 /* GetAccessor */) {
-                    if (!ts.isInAmbientContext(node) && ts.nodeIsPresent(node.body) && (node.flags & 128 /* HasImplicitReturn */)) {
-                        if (!(node.flags & 256 /* HasExplicitReturn */)) {
-                            error(node.name, ts.Diagnostics.A_get_accessor_must_return_a_value);
-                        }
-                    }
+        function checkSourceFile(node) {
+            ts.performance.mark("beforeCheck");
+            checkSourceFileWorker(node);
+            ts.performance.mark("afterCheck");
+            ts.performance.measure("Check", "beforeCheck", "afterCheck");
+        }
+        // Fully type check a source file and collect the relevant diagnostics.
+        function checkSourceFileWorker(node) {
+            var links = getNodeLinks(node);
+            if (!(links.flags & 1 /* TypeChecked */)) {
+                // If skipLibCheck is enabled, skip type checking if file is a declaration file.
+                // If skipDefaultLibCheck is enabled, skip type checking if file contains a
+                // '/// <reference no-default-lib="true"/>' directive.
+                if (compilerOptions.skipLibCheck && node.isDeclarationFile || compilerOptions.skipDefaultLibCheck && node.hasNoDefaultLib) {
+                    return;
                 }
-                // Do not use hasDynamicName here, because that returns false for well known symbols.
-                // We want to perform checkComputedPropertyName for all computed properties, including
-                // well known symbols.
-                if (node.name.kind === 140 /* ComputedPropertyName */) {
-                    checkComputedPropertyName(node.name);
+                // Grammar checking
+                checkGrammarSourceFile(node);
+                potentialThisCollisions.length = 0;
+                potentialNewTargetCollisions.length = 0;
+                deferredNodes = [];
+                deferredUnusedIdentifierNodes = produceDiagnostics && noUnusedIdentifiers ? [] : undefined;
+                ts.forEach(node.statements, checkSourceElement);
+                checkDeferredNodes();
+                if (ts.isExternalModule(node)) {
+                    registerForUnusedIdentifiersCheck(node);
                 }
-                if (!ts.hasDynamicName(node)) {
-                    // TypeScript 1.0 spec (April 2014): 8.4.3
-                    // Accessors for the same member name must specify the same accessibility.
-                    var otherKind = node.kind === 149 /* GetAccessor */ ? 150 /* SetAccessor */ : 149 /* GetAccessor */;
-                    var otherAccessor = ts.getDeclarationOfKind(node.symbol, otherKind);
-                    if (otherAccessor) {
-                        if ((ts.getModifierFlags(node) & 28 /* AccessibilityModifier */) !== (ts.getModifierFlags(otherAccessor) & 28 /* AccessibilityModifier */)) {
-                            error(node.name, ts.Diagnostics.Getter_and_setter_accessors_do_not_agree_in_visibility);
-                        }
-                        if (ts.hasModifier(node, 128 /* Abstract */) !== ts.hasModifier(otherAccessor, 128 /* Abstract */)) {
-                            error(node.name, ts.Diagnostics.Accessors_must_both_be_abstract_or_non_abstract);
-                        }
-                        // TypeScript 1.0 spec (April 2014): 4.5
-                        // If both accessors include type annotations, the specified types must be identical.
-                        checkAccessorDeclarationTypesIdentical(node, otherAccessor, getAnnotatedAccessorType, ts.Diagnostics.get_and_set_accessor_must_have_the_same_type);
-                        checkAccessorDeclarationTypesIdentical(node, otherAccessor, getThisTypeOfDeclaration, ts.Diagnostics.get_and_set_accessor_must_have_the_same_this_type);
-                    }
+                if (!node.isDeclarationFile) {
+                    checkUnusedIdentifiers();
+                }
+                deferredNodes = undefined;
+                deferredUnusedIdentifierNodes = undefined;
+                if (ts.isExternalOrCommonJsModule(node)) {
+                    checkExternalModuleExports(node);
+                }
+                if (potentialThisCollisions.length) {
+                    ts.forEach(potentialThisCollisions, checkIfThisIsCapturedInEnclosingScope);
+                    potentialThisCollisions.length = 0;
                 }
-                var returnType = getTypeOfAccessors(getSymbolOfNode(node));
-                if (node.kind === 149 /* GetAccessor */) {
-                    checkAllCodePathsInNonVoidFunctionReturnOrThrow(node, returnType);
+                if (potentialNewTargetCollisions.length) {
+                    ts.forEach(potentialNewTargetCollisions, checkIfNewTargetIsCapturedInEnclosingScope);
+                    potentialNewTargetCollisions.length = 0;
                 }
+                links.flags |= 1 /* TypeChecked */;
             }
-            if (node.parent.kind !== 171 /* ObjectLiteralExpression */) {
-                checkSourceElement(node.body);
-                registerForUnusedIdentifiersCheck(node);
+        }
+        function getDiagnostics(sourceFile, ct) {
+            try {
+                // Record the cancellation token so it can be checked later on during checkSourceElement.
+                // Do this in a finally block so we can ensure that it gets reset back to nothing after
+                // this call is done.
+                cancellationToken = ct;
+                return getDiagnosticsWorker(sourceFile);
             }
-            else {
-                checkNodeDeferred(node);
+            finally {
+                cancellationToken = undefined;
             }
         }
-        function checkAccessorDeclarationTypesIdentical(first, second, getAnnotatedType, message) {
-            var firstType = getAnnotatedType(first);
-            var secondType = getAnnotatedType(second);
-            if (firstType && secondType && !isTypeIdenticalTo(firstType, secondType)) {
-                error(first, message);
+        function getDiagnosticsWorker(sourceFile) {
+            throwIfNonDiagnosticsProducing();
+            if (sourceFile) {
+                // Some global diagnostics are deferred until they are needed and
+                // may not be reported in the firt call to getGlobalDiagnostics.
+                // We should catch these changes and report them.
+                var previousGlobalDiagnostics = diagnostics.getGlobalDiagnostics();
+                var previousGlobalDiagnosticsSize = previousGlobalDiagnostics.length;
+                checkSourceFile(sourceFile);
+                var semanticDiagnostics = diagnostics.getDiagnostics(sourceFile.fileName);
+                var currentGlobalDiagnostics = diagnostics.getGlobalDiagnostics();
+                if (currentGlobalDiagnostics !== previousGlobalDiagnostics) {
+                    // If the arrays are not the same reference, new diagnostics were added.
+                    var deferredGlobalDiagnostics = ts.relativeComplement(previousGlobalDiagnostics, currentGlobalDiagnostics, ts.compareDiagnostics);
+                    return ts.concatenate(deferredGlobalDiagnostics, semanticDiagnostics);
+                }
+                else if (previousGlobalDiagnosticsSize === 0 && currentGlobalDiagnostics.length > 0) {
+                    // If the arrays are the same reference, but the length has changed, a single
+                    // new diagnostic was added as DiagnosticCollection attempts to reuse the
+                    // same array.
+                    return ts.concatenate(currentGlobalDiagnostics, semanticDiagnostics);
+                }
+                return semanticDiagnostics;
             }
+            // Global diagnostics are always added when a file is not provided to
+            // getDiagnostics
+            ts.forEach(host.getSourceFiles(), checkSourceFile);
+            return diagnostics.getDiagnostics();
         }
-        function checkAccessorDeferred(node) {
-            checkSourceElement(node.body);
-            registerForUnusedIdentifiersCheck(node);
+        function getGlobalDiagnostics() {
+            throwIfNonDiagnosticsProducing();
+            return diagnostics.getGlobalDiagnostics();
         }
-        function checkMissingDeclaration(node) {
-            checkDecorators(node);
+        function throwIfNonDiagnosticsProducing() {
+            if (!produceDiagnostics) {
+                throw new Error("Trying to get diagnostics from a type checker that does not produce them.");
+            }
         }
-        function checkTypeArgumentConstraints(typeParameters, typeArgumentNodes) {
-            var typeArguments;
-            var mapper;
-            var result = true;
-            for (var i = 0; i < typeParameters.length; i++) {
-                var constraint = getConstraintOfTypeParameter(typeParameters[i]);
-                if (constraint) {
-                    if (!typeArguments) {
-                        typeArguments = ts.map(typeArgumentNodes, getTypeFromTypeNodeNoAlias);
-                        mapper = createTypeMapper(typeParameters, typeArguments);
+        // Language service support
+        function isInsideWithStatementBody(node) {
+            if (node) {
+                while (node.parent) {
+                    if (node.parent.kind === 220 /* WithStatement */ && node.parent.statement === node) {
+                        return true;
                     }
-                    var typeArgument = typeArguments[i];
-                    result = result && checkTypeAssignableTo(typeArgument, getTypeWithThisArgument(instantiateType(constraint, mapper), typeArgument), typeArgumentNodes[i], ts.Diagnostics.Type_0_does_not_satisfy_the_constraint_1);
+                    node = node.parent;
                 }
             }
-            return result;
+            return false;
         }
-        function checkTypeReferenceNode(node) {
-            checkGrammarTypeArguments(node, node.typeArguments);
-            var type = getTypeFromTypeReference(node);
-            if (type !== unknownType) {
-                if (node.typeArguments) {
-                    // Do type argument local checks only if referenced type is successfully resolved
-                    ts.forEach(node.typeArguments, checkSourceElement);
-                    if (produceDiagnostics) {
-                        var symbol = getNodeLinks(node).resolvedSymbol;
-                        var typeParameters = symbol.flags & 524288 /* TypeAlias */ ? getSymbolLinks(symbol).typeParameters : type.target.localTypeParameters;
-                        checkTypeArgumentConstraints(typeParameters, node.typeArguments);
+        function getSymbolsInScope(location, meaning) {
+            if (isInsideWithStatementBody(location)) {
+                // We cannot answer semantic questions within a with block, do not proceed any further
+                return [];
+            }
+            var symbols = ts.createMap();
+            var memberFlags = 0 /* None */;
+            populateSymbols();
+            return symbolsToArray(symbols);
+            function populateSymbols() {
+                while (location) {
+                    if (location.locals && !isGlobalSourceFile(location)) {
+                        copySymbols(location.locals, meaning);
+                    }
+                    switch (location.kind) {
+                        case 265 /* SourceFile */:
+                            if (!ts.isExternalOrCommonJsModule(location)) {
+                                break;
+                            }
+                        // falls through
+                        case 233 /* ModuleDeclaration */:
+                            copySymbols(getSymbolOfNode(location).exports, meaning & 8914931 /* ModuleMember */);
+                            break;
+                        case 232 /* EnumDeclaration */:
+                            copySymbols(getSymbolOfNode(location).exports, meaning & 8 /* EnumMember */);
+                            break;
+                        case 199 /* ClassExpression */:
+                            var className = location.name;
+                            if (className) {
+                                copySymbol(location.symbol, meaning);
+                            }
+                        // falls through
+                        // this fall-through is necessary because we would like to handle
+                        // type parameter inside class expression similar to how we handle it in classDeclaration and interface Declaration
+                        case 229 /* ClassDeclaration */:
+                        case 230 /* InterfaceDeclaration */:
+                            // If we didn't come from static member of class or interface,
+                            // add the type parameters into the symbol table
+                            // (type parameters of classDeclaration/classExpression and interface are in member property of the symbol.
+                            // Note: that the memberFlags come from previous iteration.
+                            if (!(memberFlags & 32 /* Static */)) {
+                                copySymbols(getSymbolOfNode(location).members, meaning & 793064 /* Type */);
+                            }
+                            break;
+                        case 186 /* FunctionExpression */:
+                            var funcName = location.name;
+                            if (funcName) {
+                                copySymbol(location.symbol, meaning);
+                            }
+                            break;
                     }
+                    if (ts.introducesArgumentsExoticObject(location)) {
+                        copySymbol(argumentsSymbol, meaning);
+                    }
+                    memberFlags = ts.getModifierFlags(location);
+                    location = location.parent;
                 }
-                if (type.flags & 16 /* Enum */ && !type.memberTypes && getNodeLinks(node).resolvedSymbol.flags & 8 /* EnumMember */) {
-                    error(node, ts.Diagnostics.Enum_type_0_has_members_with_initializers_that_are_not_literals, typeToString(type));
+                copySymbols(globals, meaning);
+            }
+            /**
+             * Copy the given symbol into symbol tables if the symbol has the given meaning
+             * and it doesn't already existed in the symbol table
+             * @param key a key for storing in symbol table; if undefined, use symbol.name
+             * @param symbol the symbol to be added into symbol table
+             * @param meaning meaning of symbol to filter by before adding to symbol table
+             */
+            function copySymbol(symbol, meaning) {
+                if (symbol.flags & meaning) {
+                    var id = symbol.name;
+                    // We will copy all symbol regardless of its reserved name because
+                    // symbolsToArray will check whether the key is a reserved name and
+                    // it will not copy symbol with reserved name to the array
+                    if (!symbols.has(id)) {
+                        symbols.set(id, symbol);
+                    }
+                }
+            }
+            function copySymbols(source, meaning) {
+                if (meaning) {
+                    source.forEach(function (symbol) {
+                        copySymbol(symbol, meaning);
+                    });
                 }
             }
         }
-        function checkTypeQuery(node) {
-            getTypeFromTypeQueryNode(node);
+        function isTypeDeclarationName(name) {
+            return name.kind === 71 /* Identifier */ &&
+                isTypeDeclaration(name.parent) &&
+                name.parent.name === name;
         }
-        function checkTypeLiteral(node) {
-            ts.forEach(node.members, checkSourceElement);
-            if (produceDiagnostics) {
-                var type = getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node);
-                checkIndexConstraints(type);
-                checkTypeForDuplicateIndexSignatures(node);
-                checkObjectTypeForDuplicateDeclarations(node);
+        function isTypeDeclaration(node) {
+            switch (node.kind) {
+                case 145 /* TypeParameter */:
+                case 229 /* ClassDeclaration */:
+                case 230 /* InterfaceDeclaration */:
+                case 231 /* TypeAliasDeclaration */:
+                case 232 /* EnumDeclaration */:
+                    return true;
             }
         }
-        function checkArrayType(node) {
-            checkSourceElement(node.elementType);
+        // True if the given identifier is part of a type reference
+        function isTypeReferenceIdentifier(entityName) {
+            var node = entityName;
+            while (node.parent && node.parent.kind === 143 /* QualifiedName */) {
+                node = node.parent;
+            }
+            return node.parent && (node.parent.kind === 159 /* TypeReference */ || node.parent.kind === 277 /* JSDocTypeReference */);
         }
-        function checkTupleType(node) {
-            // Grammar checking
-            var hasErrorFromDisallowedTrailingComma = checkGrammarForDisallowedTrailingComma(node.elementTypes);
-            if (!hasErrorFromDisallowedTrailingComma && node.elementTypes.length === 0) {
-                grammarErrorOnNode(node, ts.Diagnostics.A_tuple_type_element_list_cannot_be_empty);
+        function isHeritageClauseElementIdentifier(entityName) {
+            var node = entityName;
+            while (node.parent && node.parent.kind === 179 /* PropertyAccessExpression */) {
+                node = node.parent;
             }
-            ts.forEach(node.elementTypes, checkSourceElement);
+            return node.parent && node.parent.kind === 201 /* ExpressionWithTypeArguments */;
         }
-        function checkUnionOrIntersectionType(node) {
-            ts.forEach(node.types, checkSourceElement);
+        function forEachEnclosingClass(node, callback) {
+            var result;
+            while (true) {
+                node = ts.getContainingClass(node);
+                if (!node)
+                    break;
+                if (result = callback(node))
+                    break;
+            }
+            return result;
         }
-        function isPrivateWithinAmbient(node) {
-            return (ts.getModifierFlags(node) & 8 /* Private */) && ts.isInAmbientContext(node);
+        function isNodeWithinClass(node, classDeclaration) {
+            return !!forEachEnclosingClass(node, function (n) { return n === classDeclaration; });
         }
-        function getEffectiveDeclarationFlags(n, flagsToCheck) {
-            var flags = ts.getCombinedModifierFlags(n);
-            // children of classes (even ambient classes) should not be marked as ambient or export
-            // because those flags have no useful semantics there.
-            if (n.parent.kind !== 222 /* InterfaceDeclaration */ &&
-                n.parent.kind !== 221 /* ClassDeclaration */ &&
-                n.parent.kind !== 192 /* ClassExpression */ &&
-                ts.isInAmbientContext(n)) {
-                if (!(flags & 2 /* Ambient */)) {
-                    // It is nested in an ambient context, which means it is automatically exported
-                    flags |= 1 /* Export */;
-                }
-                flags |= 2 /* Ambient */;
+        function getLeftSideOfImportEqualsOrExportAssignment(nodeOnRightSide) {
+            while (nodeOnRightSide.parent.kind === 143 /* QualifiedName */) {
+                nodeOnRightSide = nodeOnRightSide.parent;
             }
-            return flags & flagsToCheck;
+            if (nodeOnRightSide.parent.kind === 237 /* ImportEqualsDeclaration */) {
+                return nodeOnRightSide.parent.moduleReference === nodeOnRightSide && nodeOnRightSide.parent;
+            }
+            if (nodeOnRightSide.parent.kind === 243 /* ExportAssignment */) {
+                return nodeOnRightSide.parent.expression === nodeOnRightSide && nodeOnRightSide.parent;
+            }
+            return undefined;
         }
-        function checkFunctionOrConstructorSymbol(symbol) {
-            if (!produceDiagnostics) {
-                return;
+        function isInRightSideOfImportOrExportAssignment(node) {
+            return getLeftSideOfImportEqualsOrExportAssignment(node) !== undefined;
+        }
+        function getSpecialPropertyAssignmentSymbolFromEntityName(entityName) {
+            var specialPropertyAssignmentKind = ts.getSpecialPropertyAssignmentKind(entityName.parent.parent);
+            switch (specialPropertyAssignmentKind) {
+                case 1 /* ExportsProperty */:
+                case 3 /* PrototypeProperty */:
+                    return getSymbolOfNode(entityName.parent);
+                case 4 /* ThisProperty */:
+                case 2 /* ModuleExports */:
+                case 5 /* Property */:
+                    return getSymbolOfNode(entityName.parent.parent);
             }
-            function getCanonicalOverload(overloads, implementation) {
-                // Consider the canonical set of flags to be the flags of the bodyDeclaration or the first declaration
-                // Error on all deviations from this canonical set of flags
-                // The caveat is that if some overloads are defined in lib.d.ts, we don't want to
-                // report the errors on those. To achieve this, we will say that the implementation is
-                // the canonical signature only if it is in the same container as the first overload
-                var implementationSharesContainerWithFirstOverload = implementation !== undefined && implementation.parent === overloads[0].parent;
-                return implementationSharesContainerWithFirstOverload ? implementation : overloads[0];
+        }
+        function getSymbolOfEntityNameOrPropertyAccessExpression(entityName) {
+            if (ts.isDeclarationName(entityName)) {
+                return getSymbolOfNode(entityName.parent);
             }
-            function checkFlagAgreementBetweenOverloads(overloads, implementation, flagsToCheck, someOverloadFlags, allOverloadFlags) {
-                // Error if some overloads have a flag that is not shared by all overloads. To find the
-                // deviations, we XOR someOverloadFlags with allOverloadFlags
-                var someButNotAllOverloadFlags = someOverloadFlags ^ allOverloadFlags;
-                if (someButNotAllOverloadFlags !== 0) {
-                    var canonicalFlags_1 = getEffectiveDeclarationFlags(getCanonicalOverload(overloads, implementation), flagsToCheck);
-                    ts.forEach(overloads, function (o) {
-                        var deviation = getEffectiveDeclarationFlags(o, flagsToCheck) ^ canonicalFlags_1;
-                        if (deviation & 1 /* Export */) {
-                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_exported_or_non_exported);
-                        }
-                        else if (deviation & 2 /* Ambient */) {
-                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_ambient_or_non_ambient);
-                        }
-                        else if (deviation & (8 /* Private */ | 16 /* Protected */)) {
-                            error(o.name || o, ts.Diagnostics.Overload_signatures_must_all_be_public_private_or_protected);
-                        }
-                        else if (deviation & 128 /* Abstract */) {
-                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_abstract_or_non_abstract);
-                        }
-                    });
+            if (ts.isInJavaScriptFile(entityName) &&
+                entityName.parent.kind === 179 /* PropertyAccessExpression */ &&
+                entityName.parent === entityName.parent.parent.left) {
+                // Check if this is a special property assignment
+                var specialPropertyAssignmentSymbol = getSpecialPropertyAssignmentSymbolFromEntityName(entityName);
+                if (specialPropertyAssignmentSymbol) {
+                    return specialPropertyAssignmentSymbol;
                 }
             }
-            function checkQuestionTokenAgreementBetweenOverloads(overloads, implementation, someHaveQuestionToken, allHaveQuestionToken) {
-                if (someHaveQuestionToken !== allHaveQuestionToken) {
-                    var canonicalHasQuestionToken_1 = ts.hasQuestionToken(getCanonicalOverload(overloads, implementation));
-                    ts.forEach(overloads, function (o) {
-                        var deviation = ts.hasQuestionToken(o) !== canonicalHasQuestionToken_1;
-                        if (deviation) {
-                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_optional_or_required);
-                        }
-                    });
-                }
+            if (entityName.parent.kind === 243 /* ExportAssignment */ && ts.isEntityNameExpression(entityName)) {
+                return resolveEntityName(entityName, 
+                /*all meanings*/ 107455 /* Value */ | 793064 /* Type */ | 1920 /* Namespace */ | 8388608 /* Alias */);
             }
-            var flagsToCheck = 1 /* Export */ | 2 /* Ambient */ | 8 /* Private */ | 16 /* Protected */ | 128 /* Abstract */;
-            var someNodeFlags = 0 /* None */;
-            var allNodeFlags = flagsToCheck;
-            var someHaveQuestionToken = false;
-            var allHaveQuestionToken = true;
-            var hasOverloads = false;
-            var bodyDeclaration;
-            var lastSeenNonAmbientDeclaration;
-            var previousDeclaration;
-            var declarations = symbol.declarations;
-            var isConstructor = (symbol.flags & 16384 /* Constructor */) !== 0;
-            function reportImplementationExpectedError(node) {
-                if (node.name && ts.nodeIsMissing(node.name)) {
-                    return;
-                }
-                var seen = false;
-                var subsequentNode = ts.forEachChild(node.parent, function (c) {
-                    if (seen) {
-                        return c;
-                    }
-                    else {
-                        seen = c === node;
-                    }
-                });
-                // We may be here because of some extra nodes between overloads that could not be parsed into a valid node.
-                // In this case the subsequent node is not really consecutive (.pos !== node.end), and we must ignore it here.
-                if (subsequentNode && subsequentNode.pos === node.end) {
-                    if (subsequentNode.kind === node.kind) {
-                        var errorNode_1 = subsequentNode.name || subsequentNode;
-                        // TODO(jfreeman): These are methods, so handle computed name case
-                        if (node.name && subsequentNode.name && node.name.text === subsequentNode.name.text) {
-                            var reportError = (node.kind === 147 /* MethodDeclaration */ || node.kind === 146 /* MethodSignature */) &&
-                                (ts.getModifierFlags(node) & 32 /* Static */) !== (ts.getModifierFlags(subsequentNode) & 32 /* Static */);
-                            // we can get here in two cases
-                            // 1. mixed static and instance class members
-                            // 2. something with the same name was defined before the set of overloads that prevents them from merging
-                            // here we'll report error only for the first case since for second we should already report error in binder
-                            if (reportError) {
-                                var diagnostic = ts.getModifierFlags(node) & 32 /* Static */ ? ts.Diagnostics.Function_overload_must_be_static : ts.Diagnostics.Function_overload_must_not_be_static;
-                                error(errorNode_1, diagnostic);
-                            }
-                            return;
-                        }
-                        else if (ts.nodeIsPresent(subsequentNode.body)) {
-                            error(errorNode_1, ts.Diagnostics.Function_implementation_name_must_be_0, ts.declarationNameToString(node.name));
-                            return;
-                        }
+            if (entityName.kind !== 179 /* PropertyAccessExpression */ && isInRightSideOfImportOrExportAssignment(entityName)) {
+                // Since we already checked for ExportAssignment, this really could only be an Import
+                var importEqualsDeclaration = ts.getAncestor(entityName, 237 /* ImportEqualsDeclaration */);
+                ts.Debug.assert(importEqualsDeclaration !== undefined);
+                return getSymbolOfPartOfRightHandSideOfImportEquals(entityName, /*dontResolveAlias*/ true);
+            }
+            if (ts.isRightSideOfQualifiedNameOrPropertyAccess(entityName)) {
+                entityName = entityName.parent;
+            }
+            if (isHeritageClauseElementIdentifier(entityName)) {
+                var meaning = 0 /* None */;
+                // In an interface or class, we're definitely interested in a type.
+                if (entityName.parent.kind === 201 /* ExpressionWithTypeArguments */) {
+                    meaning = 793064 /* Type */;
+                    // In a class 'extends' clause we are also looking for a value.
+                    if (ts.isExpressionWithTypeArgumentsInClassExtendsClause(entityName.parent)) {
+                        meaning |= 107455 /* Value */;
                     }
                 }
-                var errorNode = node.name || node;
-                if (isConstructor) {
-                    error(errorNode, ts.Diagnostics.Constructor_implementation_is_missing);
-                }
                 else {
-                    // Report different errors regarding non-consecutive blocks of declarations depending on whether
-                    // the node in question is abstract.
-                    if (ts.getModifierFlags(node) & 128 /* Abstract */) {
-                        error(errorNode, ts.Diagnostics.All_declarations_of_an_abstract_method_must_be_consecutive);
-                    }
-                    else {
-                        error(errorNode, ts.Diagnostics.Function_implementation_is_missing_or_not_immediately_following_the_declaration);
-                    }
+                    meaning = 1920 /* Namespace */;
+                }
+                meaning |= 8388608 /* Alias */;
+                var entityNameSymbol = resolveEntityName(entityName, meaning);
+                if (entityNameSymbol) {
+                    return entityNameSymbol;
                 }
             }
-            var duplicateFunctionDeclaration = false;
-            var multipleConstructorImplementation = false;
-            for (var _i = 0, declarations_4 = declarations; _i < declarations_4.length; _i++) {
-                var current = declarations_4[_i];
-                var node = current;
-                var inAmbientContext = ts.isInAmbientContext(node);
-                var inAmbientContextOrInterface = node.parent.kind === 222 /* InterfaceDeclaration */ || node.parent.kind === 159 /* TypeLiteral */ || inAmbientContext;
-                if (inAmbientContextOrInterface) {
-                    // check if declarations are consecutive only if they are non-ambient
-                    // 1. ambient declarations can be interleaved
-                    // i.e. this is legal
-                    //     declare function foo();
-                    //     declare function bar();
-                    //     declare function foo();
-                    // 2. mixing ambient and non-ambient declarations is a separate error that will be reported - do not want to report an extra one
-                    previousDeclaration = undefined;
+            if (entityName.parent.kind === 287 /* JSDocParameterTag */) {
+                var parameter = ts.getParameterFromJSDoc(entityName.parent);
+                return parameter && parameter.symbol;
+            }
+            if (entityName.parent.kind === 145 /* TypeParameter */ && entityName.parent.parent.kind === 290 /* JSDocTemplateTag */) {
+                ts.Debug.assert(!ts.isInJavaScriptFile(entityName)); // Otherwise `isDeclarationName` would have been true.
+                var typeParameter = ts.getTypeParameterFromJsDoc(entityName.parent);
+                return typeParameter && typeParameter.symbol;
+            }
+            if (ts.isPartOfExpression(entityName)) {
+                if (ts.nodeIsMissing(entityName)) {
+                    // Missing entity name.
+                    return undefined;
                 }
-                if (node.kind === 220 /* FunctionDeclaration */ || node.kind === 147 /* MethodDeclaration */ || node.kind === 146 /* MethodSignature */ || node.kind === 148 /* Constructor */) {
-                    var currentNodeFlags = getEffectiveDeclarationFlags(node, flagsToCheck);
-                    someNodeFlags |= currentNodeFlags;
-                    allNodeFlags &= currentNodeFlags;
-                    someHaveQuestionToken = someHaveQuestionToken || ts.hasQuestionToken(node);
-                    allHaveQuestionToken = allHaveQuestionToken && ts.hasQuestionToken(node);
-                    if (ts.nodeIsPresent(node.body) && bodyDeclaration) {
-                        if (isConstructor) {
-                            multipleConstructorImplementation = true;
-                        }
-                        else {
-                            duplicateFunctionDeclaration = true;
-                        }
-                    }
-                    else if (previousDeclaration && previousDeclaration.parent === node.parent && previousDeclaration.end !== node.pos) {
-                        reportImplementationExpectedError(previousDeclaration);
-                    }
-                    if (ts.nodeIsPresent(node.body)) {
-                        if (!bodyDeclaration) {
-                            bodyDeclaration = node;
-                        }
+                if (entityName.kind === 71 /* Identifier */) {
+                    if (ts.isJSXTagName(entityName) && isJsxIntrinsicIdentifier(entityName)) {
+                        return getIntrinsicTagSymbol(entityName.parent);
                     }
-                    else {
-                        hasOverloads = true;
+                    return resolveEntityName(entityName, 107455 /* Value */, /*ignoreErrors*/ false, /*dontResolveAlias*/ true);
+                }
+                else if (entityName.kind === 179 /* PropertyAccessExpression */) {
+                    var symbol = getNodeLinks(entityName).resolvedSymbol;
+                    if (!symbol) {
+                        checkPropertyAccessExpression(entityName);
                     }
-                    previousDeclaration = node;
-                    if (!inAmbientContextOrInterface) {
-                        lastSeenNonAmbientDeclaration = node;
+                    return getNodeLinks(entityName).resolvedSymbol;
+                }
+                else if (entityName.kind === 143 /* QualifiedName */) {
+                    var symbol = getNodeLinks(entityName).resolvedSymbol;
+                    if (!symbol) {
+                        checkQualifiedName(entityName);
                     }
+                    return getNodeLinks(entityName).resolvedSymbol;
                 }
             }
-            if (multipleConstructorImplementation) {
-                ts.forEach(declarations, function (declaration) {
-                    error(declaration, ts.Diagnostics.Multiple_constructor_implementations_are_not_allowed);
-                });
-            }
-            if (duplicateFunctionDeclaration) {
-                ts.forEach(declarations, function (declaration) {
-                    error(declaration.name, ts.Diagnostics.Duplicate_function_implementation);
-                });
+            else if (isTypeReferenceIdentifier(entityName)) {
+                var meaning = (entityName.parent.kind === 159 /* TypeReference */ || entityName.parent.kind === 277 /* JSDocTypeReference */) ? 793064 /* Type */ : 1920 /* Namespace */;
+                return resolveEntityName(entityName, meaning, /*ignoreErrors*/ false, /*dontResolveAlias*/ true);
             }
-            // Abstract methods can't have an implementation -- in particular, they don't need one.
-            if (lastSeenNonAmbientDeclaration && !lastSeenNonAmbientDeclaration.body &&
-                !(ts.getModifierFlags(lastSeenNonAmbientDeclaration) & 128 /* Abstract */) && !lastSeenNonAmbientDeclaration.questionToken) {
-                reportImplementationExpectedError(lastSeenNonAmbientDeclaration);
+            else if (entityName.parent.kind === 253 /* JsxAttribute */) {
+                return getJsxAttributePropertySymbol(entityName.parent);
             }
-            if (hasOverloads) {
-                checkFlagAgreementBetweenOverloads(declarations, bodyDeclaration, flagsToCheck, someNodeFlags, allNodeFlags);
-                checkQuestionTokenAgreementBetweenOverloads(declarations, bodyDeclaration, someHaveQuestionToken, allHaveQuestionToken);
-                if (bodyDeclaration) {
-                    var signatures = getSignaturesOfSymbol(symbol);
-                    var bodySignature = getSignatureFromDeclaration(bodyDeclaration);
-                    for (var _a = 0, signatures_3 = signatures; _a < signatures_3.length; _a++) {
-                        var signature = signatures_3[_a];
-                        if (!isImplementationCompatibleWithOverload(bodySignature, signature)) {
-                            error(signature.declaration, ts.Diagnostics.Overload_signature_is_not_compatible_with_function_implementation);
-                            break;
-                        }
-                    }
-                }
+            if (entityName.parent.kind === 158 /* TypePredicate */) {
+                return resolveEntityName(entityName, /*meaning*/ 1 /* FunctionScopedVariable */);
             }
+            // Do we want to return undefined here?
+            return undefined;
         }
-        function checkExportsOnMergedDeclarations(node) {
-            if (!produceDiagnostics) {
-                return;
+        function getSymbolAtLocation(node) {
+            if (node.kind === 265 /* SourceFile */) {
+                return ts.isExternalModule(node) ? getMergedSymbol(node.symbol) : undefined;
             }
-            // if localSymbol is defined on node then node itself is exported - check is required
-            var symbol = node.localSymbol;
-            if (!symbol) {
-                // local symbol is undefined => this declaration is non-exported.
-                // however symbol might contain other declarations that are exported
-                symbol = getSymbolOfNode(node);
-                if (!(symbol.flags & 7340032 /* Export */)) {
-                    // this is a pure local symbol (all declarations are non-exported) - no need to check anything
-                    return;
-                }
+            if (isInsideWithStatementBody(node)) {
+                // We cannot answer semantic questions within a with block, do not proceed any further
+                return undefined;
             }
-            // run the check only for the first declaration in the list
-            if (ts.getDeclarationOfKind(symbol, node.kind) !== node) {
-                return;
+            if (isDeclarationNameOrImportPropertyName(node)) {
+                // This is a declaration, call getSymbolOfNode
+                return getSymbolOfNode(node.parent);
             }
-            // we use SymbolFlags.ExportValue, SymbolFlags.ExportType and SymbolFlags.ExportNamespace
-            // to denote disjoint declarationSpaces (without making new enum type).
-            var exportedDeclarationSpaces = 0 /* None */;
-            var nonExportedDeclarationSpaces = 0 /* None */;
-            var defaultExportedDeclarationSpaces = 0 /* None */;
-            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                var d = _a[_i];
-                var declarationSpaces = getDeclarationSpaces(d);
-                var effectiveDeclarationFlags = getEffectiveDeclarationFlags(d, 1 /* Export */ | 512 /* Default */);
-                if (effectiveDeclarationFlags & 1 /* Export */) {
-                    if (effectiveDeclarationFlags & 512 /* Default */) {
-                        defaultExportedDeclarationSpaces |= declarationSpaces;
-                    }
-                    else {
-                        exportedDeclarationSpaces |= declarationSpaces;
-                    }
+            else if (ts.isLiteralComputedPropertyDeclarationName(node)) {
+                return getSymbolOfNode(node.parent.parent);
+            }
+            if (node.kind === 71 /* Identifier */) {
+                if (isInRightSideOfImportOrExportAssignment(node)) {
+                    return getSymbolOfEntityNameOrPropertyAccessExpression(node);
                 }
-                else {
-                    nonExportedDeclarationSpaces |= declarationSpaces;
+                else if (node.parent.kind === 176 /* BindingElement */ &&
+                    node.parent.parent.kind === 174 /* ObjectBindingPattern */ &&
+                    node === node.parent.propertyName) {
+                    var typeOfPattern = getTypeOfNode(node.parent.parent);
+                    var propertyDeclaration = typeOfPattern && getPropertyOfType(typeOfPattern, node.text);
+                    if (propertyDeclaration) {
+                        return propertyDeclaration;
+                    }
                 }
             }
-            // Spaces for anything not declared a 'default export'.
-            var nonDefaultExportedDeclarationSpaces = exportedDeclarationSpaces | nonExportedDeclarationSpaces;
-            var commonDeclarationSpacesForExportsAndLocals = exportedDeclarationSpaces & nonExportedDeclarationSpaces;
-            var commonDeclarationSpacesForDefaultAndNonDefault = defaultExportedDeclarationSpaces & nonDefaultExportedDeclarationSpaces;
-            if (commonDeclarationSpacesForExportsAndLocals || commonDeclarationSpacesForDefaultAndNonDefault) {
-                // declaration spaces for exported and non-exported declarations intersect
-                for (var _b = 0, _c = symbol.declarations; _b < _c.length; _b++) {
-                    var d = _c[_b];
-                    var declarationSpaces = getDeclarationSpaces(d);
-                    // Only error on the declarations that contributed to the intersecting spaces.
-                    if (declarationSpaces & commonDeclarationSpacesForDefaultAndNonDefault) {
-                        error(d.name, ts.Diagnostics.Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead, ts.declarationNameToString(d.name));
+            switch (node.kind) {
+                case 71 /* Identifier */:
+                case 179 /* PropertyAccessExpression */:
+                case 143 /* QualifiedName */:
+                    return getSymbolOfEntityNameOrPropertyAccessExpression(node);
+                case 99 /* ThisKeyword */:
+                    var container = ts.getThisContainer(node, /*includeArrowFunctions*/ false);
+                    if (ts.isFunctionLike(container)) {
+                        var sig = getSignatureFromDeclaration(container);
+                        if (sig.thisParameter) {
+                            return sig.thisParameter;
+                        }
                     }
-                    else if (declarationSpaces & commonDeclarationSpacesForExportsAndLocals) {
-                        error(d.name, ts.Diagnostics.Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local, ts.declarationNameToString(d.name));
+                // falls through
+                case 97 /* SuperKeyword */:
+                    var type = ts.isPartOfExpression(node) ? getTypeOfExpression(node) : getTypeFromTypeNode(node);
+                    return type.symbol;
+                case 169 /* ThisType */:
+                    return getTypeFromTypeNode(node).symbol;
+                case 123 /* ConstructorKeyword */:
+                    // constructor keyword for an overload, should take us to the definition if it exist
+                    var constructorDeclaration = node.parent;
+                    if (constructorDeclaration && constructorDeclaration.kind === 152 /* Constructor */) {
+                        return constructorDeclaration.parent.symbol;
                     }
-                }
-            }
-            function getDeclarationSpaces(d) {
-                switch (d.kind) {
-                    case 222 /* InterfaceDeclaration */:
-                        return 2097152 /* ExportType */;
-                    case 225 /* ModuleDeclaration */:
-                        return ts.isAmbientModule(d) || ts.getModuleInstanceState(d) !== 0 /* NonInstantiated */
-                            ? 4194304 /* ExportNamespace */ | 1048576 /* ExportValue */
-                            : 4194304 /* ExportNamespace */;
-                    case 221 /* ClassDeclaration */:
-                    case 224 /* EnumDeclaration */:
-                        return 2097152 /* ExportType */ | 1048576 /* ExportValue */;
-                    case 229 /* ImportEqualsDeclaration */:
-                        var result_2 = 0;
-                        var target = resolveAlias(getSymbolOfNode(d));
-                        ts.forEach(target.declarations, function (d) { result_2 |= getDeclarationSpaces(d); });
-                        return result_2;
-                    default:
-                        return 1048576 /* ExportValue */;
-                }
+                    return undefined;
+                case 9 /* StringLiteral */:
+                    // 1). import x = require("./mo/*gotToDefinitionHere*/d")
+                    // 2). External module name in an import declaration
+                    // 3). Dynamic import call or require in javascript
+                    if ((ts.isExternalModuleImportEqualsDeclaration(node.parent.parent) && ts.getExternalModuleImportEqualsDeclarationExpression(node.parent.parent) === node) ||
+                        ((node.parent.kind === 238 /* ImportDeclaration */ || node.parent.kind === 244 /* ExportDeclaration */) && node.parent.moduleSpecifier === node) ||
+                        ((ts.isInJavaScriptFile(node) && ts.isRequireCall(node.parent, /*checkArgumentIsStringLiteral*/ false)) || ts.isImportCall(node.parent))) {
+                        return resolveExternalModuleName(node, node);
+                    }
+                // falls through
+                case 8 /* NumericLiteral */:
+                    // index access
+                    if (node.parent.kind === 180 /* ElementAccessExpression */ && node.parent.argumentExpression === node) {
+                        var objectType = getTypeOfExpression(node.parent.expression);
+                        if (objectType === unknownType)
+                            return undefined;
+                        var apparentType = getApparentType(objectType);
+                        if (apparentType === unknownType)
+                            return undefined;
+                        return getPropertyOfType(apparentType, node.text);
+                    }
+                    break;
             }
+            return undefined;
         }
-        function checkNonThenableType(type, location, message) {
-            type = getWidenedType(type);
-            if (!isTypeAny(type) && !isTypeNever(type) && isTypeAssignableTo(type, getGlobalThenableType())) {
-                if (location) {
-                    if (!message) {
-                        message = ts.Diagnostics.Operand_for_await_does_not_have_a_valid_callable_then_member;
-                    }
-                    error(location, message);
-                }
-                return unknownType;
+        function getShorthandAssignmentValueSymbol(location) {
+            // The function returns a value symbol of an identifier in the short-hand property assignment.
+            // This is necessary as an identifier in short-hand property assignment can contains two meaning:
+            // property name and property value.
+            if (location && location.kind === 262 /* ShorthandPropertyAssignment */) {
+                return resolveEntityName(location.name, 107455 /* Value */ | 8388608 /* Alias */);
             }
-            return type;
+            return undefined;
         }
-        /**
-          * Gets the "promised type" of a promise.
-          * @param type The type of the promise.
-          * @remarks The "promised type" of a type is the type of the "value" parameter of the "onfulfilled" callback.
-          */
-        function getPromisedType(promise) {
-            //
-            //  { // promise
-            //      then( // thenFunction
-            //          onfulfilled: ( // onfulfilledParameterType
-            //              value: T // valueParameterType
-            //          ) => any
-            //      ): any;
-            //  }
-            //
-            if (isTypeAny(promise)) {
-                return undefined;
+        /** Returns the target of an export specifier without following aliases */
+        function getExportSpecifierLocalTargetSymbol(node) {
+            return node.parent.parent.moduleSpecifier ?
+                getExternalModuleMember(node.parent.parent, node) :
+                resolveEntityName(node.propertyName || node.name, 107455 /* Value */ | 793064 /* Type */ | 1920 /* Namespace */ | 8388608 /* Alias */);
+        }
+        function getTypeOfNode(node) {
+            if (isInsideWithStatementBody(node)) {
+                // We cannot answer semantic questions within a with block, do not proceed any further
+                return unknownType;
             }
-            if (promise.flags & 131072 /* Reference */) {
-                if (promise.target === tryGetGlobalPromiseType()
-                    || promise.target === getGlobalPromiseLikeType()) {
-                    return promise.typeArguments[0];
+            if (ts.isPartOfTypeNode(node)) {
+                var typeFromTypeNode = getTypeFromTypeNode(node);
+                if (typeFromTypeNode && ts.isExpressionWithTypeArgumentsInClassImplementsClause(node)) {
+                    var containingClass = ts.getContainingClass(node);
+                    var classType = getTypeOfNode(containingClass);
+                    typeFromTypeNode = getTypeWithThisArgument(typeFromTypeNode, classType.thisType);
                 }
+                return typeFromTypeNode;
             }
-            var globalPromiseLikeType = getInstantiatedGlobalPromiseLikeType();
-            if (globalPromiseLikeType === emptyObjectType || !isTypeAssignableTo(promise, globalPromiseLikeType)) {
-                return undefined;
+            if (ts.isPartOfExpression(node)) {
+                return getRegularTypeOfExpression(node);
             }
-            var thenFunction = getTypeOfPropertyOfType(promise, "then");
-            if (!thenFunction || isTypeAny(thenFunction)) {
-                return undefined;
+            if (ts.isExpressionWithTypeArgumentsInClassExtendsClause(node)) {
+                // A SyntaxKind.ExpressionWithTypeArguments is considered a type node, except when it occurs in the
+                // extends clause of a class. We handle that case here.
+                var classNode = ts.getContainingClass(node);
+                var classType = getDeclaredTypeOfSymbol(getSymbolOfNode(classNode));
+                var baseType = getBaseTypes(classType)[0];
+                return baseType && getTypeWithThisArgument(baseType, classType.thisType);
             }
-            var thenSignatures = getSignaturesOfType(thenFunction, 0 /* Call */);
-            if (thenSignatures.length === 0) {
-                return undefined;
+            if (isTypeDeclaration(node)) {
+                // In this case, we call getSymbolOfNode instead of getSymbolAtLocation because it is a declaration
+                var symbol = getSymbolOfNode(node);
+                return getDeclaredTypeOfSymbol(symbol);
             }
-            var onfulfilledParameterType = getTypeWithFacts(getUnionType(ts.map(thenSignatures, getTypeOfFirstParameterOfSignature)), 131072 /* NEUndefined */);
-            if (isTypeAny(onfulfilledParameterType)) {
-                return undefined;
+            if (isTypeDeclarationName(node)) {
+                var symbol = getSymbolAtLocation(node);
+                return symbol && getDeclaredTypeOfSymbol(symbol);
             }
-            var onfulfilledParameterSignatures = getSignaturesOfType(onfulfilledParameterType, 0 /* Call */);
-            if (onfulfilledParameterSignatures.length === 0) {
-                return undefined;
+            if (ts.isDeclaration(node)) {
+                // In this case, we call getSymbolOfNode instead of getSymbolAtLocation because it is a declaration
+                var symbol = getSymbolOfNode(node);
+                return getTypeOfSymbol(symbol);
             }
-            return getUnionType(ts.map(onfulfilledParameterSignatures, getTypeOfFirstParameterOfSignature), /*subtypeReduction*/ true);
-        }
-        function getTypeOfFirstParameterOfSignature(signature) {
-            return signature.parameters.length > 0 ? getTypeAtPosition(signature, 0) : neverType;
-        }
-        /**
-          * Gets the "awaited type" of a type.
-          * @param type The type to await.
-          * @remarks The "awaited type" of an expression is its "promised type" if the expression is a
-          * Promise-like type; otherwise, it is the type of the expression. This is used to reflect
-          * The runtime behavior of the `await` keyword.
-          */
-        function getAwaitedType(type) {
-            return checkAwaitedType(type, /*location*/ undefined, /*message*/ undefined);
-        }
-        function checkAwaitedType(type, location, message) {
-            return checkAwaitedTypeWorker(type);
-            function checkAwaitedTypeWorker(type) {
-                if (type.flags & 524288 /* Union */) {
-                    var types = [];
-                    for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                        var constituentType = _a[_i];
-                        types.push(checkAwaitedTypeWorker(constituentType));
-                    }
-                    return getUnionType(types, /*subtypeReduction*/ true);
-                }
-                else {
-                    var promisedType = getPromisedType(type);
-                    if (promisedType === undefined) {
-                        // The type was not a PromiseLike, so it could not be unwrapped any further.
-                        // As long as the type does not have a callable "then" property, it is
-                        // safe to return the type; otherwise, an error will have been reported in
-                        // the call to checkNonThenableType and we will return unknownType.
-                        //
-                        // An example of a non-promise "thenable" might be:
-                        //
-                        //  await { then(): void {} }
-                        //
-                        // The "thenable" does not match the minimal definition for a PromiseLike. When
-                        // a Promise/A+-compatible or ES6 promise tries to adopt this value, the promise
-                        // will never settle. We treat this as an error to help flag an early indicator
-                        // of a runtime problem. If the user wants to return this value from an async
-                        // function, they would need to wrap it in some other value. If they want it to
-                        // be treated as a promise, they can cast to <any>.
-                        return checkNonThenableType(type, location, message);
-                    }
-                    else {
-                        if (type.id === promisedType.id || ts.indexOf(awaitedTypeStack, promisedType.id) >= 0) {
-                            // We have a bad actor in the form of a promise whose promised type is
-                            // the same promise type, or a mutually recursive promise. Return the
-                            // unknown type as we cannot guess the shape. If this were the actual
-                            // case in the JavaScript, this Promise would never resolve.
-                            //
-                            // An example of a bad actor with a singly-recursive promise type might
-                            // be:
-                            //
-                            //  interface BadPromise {
-                            //      then(
-                            //          onfulfilled: (value: BadPromise) => any,
-                            //          onrejected: (error: any) => any): BadPromise;
-                            //  }
-                            //
-                            // The above interface will pass the PromiseLike check, and return a
-                            // promised type of `BadPromise`. Since this is a self reference, we
-                            // don't want to keep recursing ad infinitum.
-                            //
-                            // An example of a bad actor in the form of a mutually-recursive
-                            // promise type might be:
-                            //
-                            //  interface BadPromiseA {
-                            //      then(
-                            //          onfulfilled: (value: BadPromiseB) => any,
-                            //          onrejected: (error: any) => any): BadPromiseB;
-                            //  }
-                            //
-                            //  interface BadPromiseB {
-                            //      then(
-                            //          onfulfilled: (value: BadPromiseA) => any,
-                            //          onrejected: (error: any) => any): BadPromiseA;
-                            //  }
-                            //
-                            if (location) {
-                                error(location, ts.Diagnostics._0_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method, symbolToString(type.symbol));
-                            }
-                            return unknownType;
-                        }
-                        // Keep track of the type we're about to unwrap to avoid bad recursive promise types.
-                        // See the comments above for more information.
-                        awaitedTypeStack.push(type.id);
-                        var awaitedType = checkAwaitedTypeWorker(promisedType);
-                        awaitedTypeStack.pop();
-                        return awaitedType;
-                    }
-                }
+            if (isDeclarationNameOrImportPropertyName(node)) {
+                var symbol = getSymbolAtLocation(node);
+                return symbol && getTypeOfSymbol(symbol);
             }
-        }
-        /**
-         * Checks that the return type provided is an instantiation of the global Promise<T> type
-         * and returns the awaited type of the return type.
-         *
-         * @param returnType The return type of a FunctionLikeDeclaration
-         * @param location The node on which to report the error.
-         */
-        function checkCorrectPromiseType(returnType, location, diagnostic, typeName) {
-            if (returnType === unknownType) {
-                // The return type already had some other error, so we ignore and return
-                // the unknown type.
-                return unknownType;
+            if (ts.isBindingPattern(node)) {
+                return getTypeForVariableLikeDeclaration(node.parent, /*includeOptionality*/ true);
+            }
+            if (isInRightSideOfImportOrExportAssignment(node)) {
+                var symbol = getSymbolAtLocation(node);
+                var declaredType = symbol && getDeclaredTypeOfSymbol(symbol);
+                return declaredType !== unknownType ? declaredType : getTypeOfSymbol(symbol);
             }
-            var globalPromiseType = getGlobalPromiseType();
-            if (globalPromiseType === emptyGenericType
-                || globalPromiseType === getTargetType(returnType)) {
-                // Either we couldn't resolve the global promise type, which would have already
-                // reported an error, or we could resolve it and the return type is a valid type
-                // reference to the global type. In either case, we return the awaited type for
-                // the return type.
-                return checkAwaitedType(returnType, location, ts.Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type);
-            }
-            // The promise type was not a valid type reference to the global promise type, so we
-            // report an error and return the unknown type.
-            error(location, diagnostic, typeName);
             return unknownType;
         }
-        /**
-          * Checks the return type of an async function to ensure it is a compatible
-          * Promise implementation.
-          * @param node The signature to check
-          * @param returnType The return type for the function
-          * @remarks
-          * This checks that an async function has a valid Promise-compatible return type,
-          * and returns the *awaited type* of the promise. An async function has a valid
-          * Promise-compatible return type if the resolved value of the return type has a
-          * construct signature that takes in an `initializer` function that in turn supplies
-          * a `resolve` function as one of its arguments and results in an object with a
-          * callable `then` signature.
-          */
-        function checkAsyncFunctionReturnType(node) {
-            if (languageVersion >= 2 /* ES6 */) {
-                var returnType = getTypeFromTypeNode(node.type);
-                return checkCorrectPromiseType(returnType, node.type, ts.Diagnostics.The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type);
-            }
-            var globalPromiseConstructorLikeType = getGlobalPromiseConstructorLikeType();
-            if (globalPromiseConstructorLikeType === emptyObjectType) {
-                // If we couldn't resolve the global PromiseConstructorLike type we cannot verify
-                // compatibility with __awaiter.
-                return unknownType;
-            }
-            // As part of our emit for an async function, we will need to emit the entity name of
-            // the return type annotation as an expression. To meet the necessary runtime semantics
-            // for __awaiter, we must also check that the type of the declaration (e.g. the static
-            // side or "constructor" of the promise type) is compatible `PromiseConstructorLike`.
-            //
-            // An example might be (from lib.es6.d.ts):
-            //
-            //  interface Promise<T> { ... }
-            //  interface PromiseConstructor {
-            //      new <T>(...): Promise<T>;
-            //  }
-            //  declare var Promise: PromiseConstructor;
-            //
-            // When an async function declares a return type annotation of `Promise<T>`, we
-            // need to get the type of the `Promise` variable declaration above, which would
-            // be `PromiseConstructor`.
-            //
-            // The same case applies to a class:
-            //
-            //  declare class Promise<T> {
-            //      constructor(...);
-            //      then<U>(...): Promise<U>;
-            //  }
-            //
-            // When we get the type of the `Promise` symbol here, we get the type of the static
-            // side of the `Promise` class, which would be `{ new <T>(...): Promise<T> }`.
-            var promiseType = getTypeFromTypeNode(node.type);
-            if (promiseType === unknownType && compilerOptions.isolatedModules) {
-                // If we are compiling with isolatedModules, we may not be able to resolve the
-                // type as a value. As such, we will just return unknownType;
-                return unknownType;
+        // Gets the type of object literal or array literal of destructuring assignment.
+        // { a } from
+        //     for ( { a } of elems) {
+        //     }
+        // [ a ] from
+        //     [a] = [ some array ...]
+        function getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(expr) {
+            ts.Debug.assert(expr.kind === 178 /* ObjectLiteralExpression */ || expr.kind === 177 /* ArrayLiteralExpression */);
+            // If this is from "for of"
+            //     for ( { a } of elems) {
+            //     }
+            if (expr.parent.kind === 216 /* ForOfStatement */) {
+                var iteratedType = checkRightHandSideOfForOf(expr.parent.expression, expr.parent.awaitModifier);
+                return checkDestructuringAssignment(expr, iteratedType || unknownType);
             }
-            var promiseConstructor = getNodeLinks(node.type).resolvedSymbol;
-            if (!promiseConstructor || !symbolIsValue(promiseConstructor)) {
-                // try to fall back to global promise type.
-                var typeName = promiseConstructor
-                    ? symbolToString(promiseConstructor)
-                    : typeToString(promiseType);
-                return checkCorrectPromiseType(promiseType, node.type, ts.Diagnostics.Type_0_is_not_a_valid_async_function_return_type, typeName);
-            }
-            // If the Promise constructor, resolved locally, is an alias symbol we should mark it as referenced.
-            checkReturnTypeAnnotationAsExpression(node);
-            // Validate the promise constructor type.
-            var promiseConstructorType = getTypeOfSymbol(promiseConstructor);
-            if (!checkTypeAssignableTo(promiseConstructorType, globalPromiseConstructorLikeType, node.type, ts.Diagnostics.Type_0_is_not_a_valid_async_function_return_type)) {
-                return unknownType;
+            // If this is from "for" initializer
+            //     for ({a } = elems[0];.....) { }
+            if (expr.parent.kind === 194 /* BinaryExpression */) {
+                var iteratedType = getTypeOfExpression(expr.parent.right);
+                return checkDestructuringAssignment(expr, iteratedType || unknownType);
             }
-            // Verify there is no local declaration that could collide with the promise constructor.
-            var promiseName = ts.getEntityNameFromTypeNode(node.type);
-            var promiseNameOrNamespaceRoot = getFirstIdentifier(promiseName);
-            var rootSymbol = getSymbol(node.locals, promiseNameOrNamespaceRoot.text, 107455 /* Value */);
-            if (rootSymbol) {
-                error(rootSymbol.valueDeclaration, ts.Diagnostics.Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions, promiseNameOrNamespaceRoot.text, getFullyQualifiedName(promiseConstructor));
-                return unknownType;
+            // If this is from nested object binding pattern
+            //     for ({ skills: { primary, secondary } } = multiRobot, i = 0; i < 1; i++) {
+            if (expr.parent.kind === 261 /* PropertyAssignment */) {
+                var typeOfParentObjectLiteral = getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(expr.parent.parent);
+                return checkObjectLiteralDestructuringPropertyAssignment(typeOfParentObjectLiteral || unknownType, expr.parent);
             }
-            // Get and return the awaited type of the return type.
-            return checkAwaitedType(promiseType, node, ts.Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type);
+            // Array literal assignment - array destructuring pattern
+            ts.Debug.assert(expr.parent.kind === 177 /* ArrayLiteralExpression */);
+            //    [{ property1: p1, property2 }] = elems;
+            var typeOfArrayLiteral = getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(expr.parent);
+            var elementType = checkIteratedTypeOrElementType(typeOfArrayLiteral || unknownType, expr.parent, /*allowStringInput*/ false, /*allowAsyncIterables*/ false) || unknownType;
+            return checkArrayLiteralDestructuringElementAssignment(expr.parent, typeOfArrayLiteral, ts.indexOf(expr.parent.elements, expr), elementType || unknownType);
         }
-        /** Check a decorator */
-        function checkDecorator(node) {
-            var signature = getResolvedSignature(node);
-            var returnType = getReturnTypeOfSignature(signature);
-            if (returnType.flags & 1 /* Any */) {
-                return;
+        // Gets the property symbol corresponding to the property in destructuring assignment
+        // 'property1' from
+        //     for ( { property1: a } of elems) {
+        //     }
+        // 'property1' at location 'a' from:
+        //     [a] = [ property1, property2 ]
+        function getPropertySymbolOfDestructuringAssignment(location) {
+            // Get the type of the object or array literal and then look for property of given name in the type
+            var typeOfObjectLiteral = getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(location.parent.parent);
+            return typeOfObjectLiteral && getPropertyOfType(typeOfObjectLiteral, location.text);
+        }
+        function getRegularTypeOfExpression(expr) {
+            if (ts.isRightSideOfQualifiedNameOrPropertyAccess(expr)) {
+                expr = expr.parent;
             }
-            var expectedReturnType;
-            var headMessage = getDiagnosticHeadMessageForDecoratorResolution(node);
-            var errorInfo;
-            switch (node.parent.kind) {
-                case 221 /* ClassDeclaration */:
-                    var classSymbol = getSymbolOfNode(node.parent);
-                    var classConstructorType = getTypeOfSymbol(classSymbol);
-                    expectedReturnType = getUnionType([classConstructorType, voidType]);
-                    break;
-                case 142 /* Parameter */:
-                    expectedReturnType = voidType;
-                    errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any);
-                    break;
-                case 145 /* PropertyDeclaration */:
-                    expectedReturnType = voidType;
-                    errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.The_return_type_of_a_property_decorator_function_must_be_either_void_or_any);
-                    break;
-                case 147 /* MethodDeclaration */:
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                    var methodType = getTypeOfNode(node.parent);
-                    var descriptorType = createTypedPropertyDescriptorType(methodType);
-                    expectedReturnType = getUnionType([descriptorType, voidType]);
-                    break;
+            return getRegularTypeOfLiteralType(getTypeOfExpression(expr));
+        }
+        /**
+         * Gets either the static or instance type of a class element, based on
+         * whether the element is declared as "static".
+         */
+        function getParentTypeOfClassElement(node) {
+            var classSymbol = getSymbolOfNode(node.parent);
+            return ts.getModifierFlags(node) & 32 /* Static */
+                ? getTypeOfSymbol(classSymbol)
+                : getDeclaredTypeOfSymbol(classSymbol);
+        }
+        // Return the list of properties of the given type, augmented with properties from Function
+        // if the type has call or construct signatures
+        function getAugmentedPropertiesOfType(type) {
+            type = getApparentType(type);
+            var propsByName = createSymbolTable(getPropertiesOfType(type));
+            if (getSignaturesOfType(type, 0 /* Call */).length || getSignaturesOfType(type, 1 /* Construct */).length) {
+                ts.forEach(getPropertiesOfType(globalFunctionType), function (p) {
+                    if (!propsByName.has(p.name)) {
+                        propsByName.set(p.name, p);
+                    }
+                });
             }
-            checkTypeAssignableTo(returnType, expectedReturnType, node, headMessage, errorInfo);
+            return getNamedMembers(propsByName);
         }
-        /** Checks a type reference node as an expression. */
-        function checkTypeNodeAsExpression(node) {
-            // When we are emitting type metadata for decorators, we need to try to check the type
-            // as if it were an expression so that we can emit the type in a value position when we
-            // serialize the type metadata.
-            if (node && node.kind === 155 /* TypeReference */) {
-                var root = getFirstIdentifier(node.typeName);
-                var meaning = root.parent.kind === 155 /* TypeReference */ ? 793064 /* Type */ : 1920 /* Namespace */;
-                // Resolve type so we know which symbol is referenced
-                var rootSymbol = resolveName(root, root.text, meaning | 8388608 /* Alias */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined);
-                // Resolved symbol is alias
-                if (rootSymbol && rootSymbol.flags & 8388608 /* Alias */) {
-                    var aliasTarget = resolveAlias(rootSymbol);
-                    // If alias has value symbol - mark alias as referenced
-                    if (aliasTarget.flags & 107455 /* Value */ && !isConstEnumOrConstEnumOnlyModule(resolveAlias(rootSymbol))) {
-                        markAliasSymbolAsReferenced(rootSymbol);
+        function getRootSymbols(symbol) {
+            if (ts.getCheckFlags(symbol) & 6 /* Synthetic */) {
+                var symbols_4 = [];
+                var name_33 = symbol.name;
+                ts.forEach(getSymbolLinks(symbol).containingType.types, function (t) {
+                    var symbol = getPropertyOfType(t, name_33);
+                    if (symbol) {
+                        symbols_4.push(symbol);
                     }
+                });
+                return symbols_4;
+            }
+            else if (symbol.flags & 134217728 /* Transient */) {
+                var transient = symbol;
+                if (transient.leftSpread) {
+                    return getRootSymbols(transient.leftSpread).concat(getRootSymbols(transient.rightSpread));
+                }
+                if (transient.syntheticOrigin) {
+                    return getRootSymbols(transient.syntheticOrigin);
+                }
+                var target = void 0;
+                var next = symbol;
+                while (next = getSymbolLinks(next).target) {
+                    target = next;
+                }
+                if (target) {
+                    return [target];
                 }
             }
+            return [symbol];
         }
-        /**
-          * Checks the type annotation of an accessor declaration or property declaration as
-          * an expression if it is a type reference to a type with a value declaration.
-          */
-        function checkTypeAnnotationAsExpression(node) {
-            checkTypeNodeAsExpression(node.type);
-        }
-        function checkReturnTypeAnnotationAsExpression(node) {
-            checkTypeNodeAsExpression(node.type);
-        }
-        /** Checks the type annotation of the parameters of a function/method or the constructor of a class as expressions */
-        function checkParameterTypeAnnotationsAsExpressions(node) {
-            // ensure all type annotations with a value declaration are checked as an expression
-            for (var _i = 0, _a = node.parameters; _i < _a.length; _i++) {
-                var parameter = _a[_i];
-                checkTypeAnnotationAsExpression(parameter);
+        // Emitter support
+        function isArgumentsLocalBinding(node) {
+            if (!ts.isGeneratedIdentifier(node)) {
+                node = ts.getParseTreeNode(node, ts.isIdentifier);
+                if (node) {
+                    var isPropertyName_1 = node.parent.kind === 179 /* PropertyAccessExpression */ && node.parent.name === node;
+                    return !isPropertyName_1 && getReferencedValueSymbol(node) === argumentsSymbol;
+                }
             }
+            return false;
         }
-        /** Check the decorators of a node */
-        function checkDecorators(node) {
-            if (!node.decorators) {
-                return;
+        function moduleExportsSomeValue(moduleReferenceExpression) {
+            var moduleSymbol = resolveExternalModuleName(moduleReferenceExpression.parent, moduleReferenceExpression);
+            if (!moduleSymbol || ts.isShorthandAmbientModuleSymbol(moduleSymbol)) {
+                // If the module is not found or is shorthand, assume that it may export a value.
+                return true;
             }
-            // skip this check for nodes that cannot have decorators. These should have already had an error reported by
-            // checkGrammarDecorators.
-            if (!ts.nodeCanBeDecorated(node)) {
-                return;
+            var hasExportAssignment = hasExportAssignmentSymbol(moduleSymbol);
+            // if module has export assignment then 'resolveExternalModuleSymbol' will return resolved symbol for export assignment
+            // otherwise it will return moduleSymbol itself
+            moduleSymbol = resolveExternalModuleSymbol(moduleSymbol);
+            var symbolLinks = getSymbolLinks(moduleSymbol);
+            if (symbolLinks.exportsSomeValue === undefined) {
+                // for export assignments - check if resolved symbol for RHS is itself a value
+                // otherwise - check if at least one export is value
+                symbolLinks.exportsSomeValue = hasExportAssignment
+                    ? !!(moduleSymbol.flags & 107455 /* Value */)
+                    : ts.forEachEntry(getExportsOfModule(moduleSymbol), isValue);
             }
-            if (!compilerOptions.experimentalDecorators) {
-                error(node, ts.Diagnostics.Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning);
+            return symbolLinks.exportsSomeValue;
+            function isValue(s) {
+                s = resolveSymbol(s);
+                return s && !!(s.flags & 107455 /* Value */);
             }
-            if (compilerOptions.emitDecoratorMetadata) {
-                // we only need to perform these checks if we are emitting serialized type metadata for the target of a decorator.
-                switch (node.kind) {
-                    case 221 /* ClassDeclaration */:
-                        var constructor = ts.getFirstConstructorWithBody(node);
-                        if (constructor) {
-                            checkParameterTypeAnnotationsAsExpressions(constructor);
+        }
+        function isNameOfModuleOrEnumDeclaration(node) {
+            var parent = node.parent;
+            return parent && ts.isModuleOrEnumDeclaration(parent) && node === parent.name;
+        }
+        // When resolved as an expression identifier, if the given node references an exported entity, return the declaration
+        // node of the exported entity's container. Otherwise, return undefined.
+        function getReferencedExportContainer(node, prefixLocals) {
+            node = ts.getParseTreeNode(node, ts.isIdentifier);
+            if (node) {
+                // When resolving the export container for the name of a module or enum
+                // declaration, we need to start resolution at the declaration's container.
+                // Otherwise, we could incorrectly resolve the export container as the
+                // declaration if it contains an exported member with the same name.
+                var symbol = getReferencedValueSymbol(node, /*startInDeclarationContainer*/ isNameOfModuleOrEnumDeclaration(node));
+                if (symbol) {
+                    if (symbol.flags & 1048576 /* ExportValue */) {
+                        // If we reference an exported entity within the same module declaration, then whether
+                        // we prefix depends on the kind of entity. SymbolFlags.ExportHasLocal encompasses all the
+                        // kinds that we do NOT prefix.
+                        var exportSymbol = getMergedSymbol(symbol.exportSymbol);
+                        if (!prefixLocals && exportSymbol.flags & 944 /* ExportHasLocal */) {
+                            return undefined;
                         }
-                        break;
-                    case 147 /* MethodDeclaration */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                        checkParameterTypeAnnotationsAsExpressions(node);
-                        checkReturnTypeAnnotationAsExpression(node);
-                        break;
-                    case 145 /* PropertyDeclaration */:
-                    case 142 /* Parameter */:
-                        checkTypeAnnotationAsExpression(node);
-                        break;
+                        symbol = exportSymbol;
+                    }
+                    var parentSymbol_1 = getParentOfSymbol(symbol);
+                    if (parentSymbol_1) {
+                        if (parentSymbol_1.flags & 512 /* ValueModule */ && parentSymbol_1.valueDeclaration.kind === 265 /* SourceFile */) {
+                            var symbolFile = parentSymbol_1.valueDeclaration;
+                            var referenceFile = ts.getSourceFileOfNode(node);
+                            // If `node` accesses an export and that export isn't in the same file, then symbol is a namespace export, so return undefined.
+                            var symbolIsUmdExport = symbolFile !== referenceFile;
+                            return symbolIsUmdExport ? undefined : symbolFile;
+                        }
+                        return ts.findAncestor(node.parent, function (n) { return ts.isModuleOrEnumDeclaration(n) && getSymbolOfNode(n) === parentSymbol_1; });
+                    }
                 }
             }
-            ts.forEach(node.decorators, checkDecorator);
         }
-        function checkFunctionDeclaration(node) {
-            if (produceDiagnostics) {
-                checkFunctionOrMethodDeclaration(node) || checkGrammarForGenerator(node);
-                checkCollisionWithCapturedSuperVariable(node, node.name);
-                checkCollisionWithCapturedThisVariable(node, node.name);
-                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
-                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
+        // When resolved as an expression identifier, if the given node references an import, return the declaration of
+        // that import. Otherwise, return undefined.
+        function getReferencedImportDeclaration(node) {
+            node = ts.getParseTreeNode(node, ts.isIdentifier);
+            if (node) {
+                var symbol = getReferencedValueSymbol(node);
+                // We should only get the declaration of an alias if there isn't a local value
+                // declaration for the symbol
+                if (isNonLocalAlias(symbol, /*excludes*/ 107455 /* Value */)) {
+                    return getDeclarationOfAliasSymbol(symbol);
+                }
             }
+            return undefined;
         }
-        function checkFunctionOrMethodDeclaration(node) {
-            checkDecorators(node);
-            checkSignatureDeclaration(node);
-            var isAsync = ts.isAsyncFunctionLike(node);
-            // Do not use hasDynamicName here, because that returns false for well known symbols.
-            // We want to perform checkComputedPropertyName for all computed properties, including
-            // well known symbols.
-            if (node.name && node.name.kind === 140 /* ComputedPropertyName */) {
-                // This check will account for methods in class/interface declarations,
-                // as well as accessors in classes/object literals
-                checkComputedPropertyName(node.name);
-            }
-            if (!ts.hasDynamicName(node)) {
-                // first we want to check the local symbol that contain this declaration
-                // - if node.localSymbol !== undefined - this is current declaration is exported and localSymbol points to the local symbol
-                // - if node.localSymbol === undefined - this node is non-exported so we can just pick the result of getSymbolOfNode
-                var symbol = getSymbolOfNode(node);
-                var localSymbol = node.localSymbol || symbol;
-                // Since the javascript won't do semantic analysis like typescript,
-                // if the javascript file comes before the typescript file and both contain same name functions,
-                // checkFunctionOrConstructorSymbol wouldn't be called if we didnt ignore javascript function.
-                var firstDeclaration = ts.forEach(localSymbol.declarations, 
-                // Get first non javascript function declaration
-                function (declaration) { return declaration.kind === node.kind && !ts.isSourceFileJavaScript(ts.getSourceFileOfNode(declaration)) ?
-                    declaration : undefined; });
-                // Only type check the symbol once
-                if (node === firstDeclaration) {
-                    checkFunctionOrConstructorSymbol(localSymbol);
-                }
-                if (symbol.parent) {
-                    // run check once for the first declaration
-                    if (ts.getDeclarationOfKind(symbol, node.kind) === node) {
-                        // run check on export symbol to check that modifiers agree across all exported declarations
-                        checkFunctionOrConstructorSymbol(symbol);
+        function isSymbolOfDeclarationWithCollidingName(symbol) {
+            if (symbol.flags & 418 /* BlockScoped */) {
+                var links = getSymbolLinks(symbol);
+                if (links.isDeclarationWithCollidingName === undefined) {
+                    var container = ts.getEnclosingBlockScopeContainer(symbol.valueDeclaration);
+                    if (ts.isStatementWithLocals(container)) {
+                        var nodeLinks_1 = getNodeLinks(symbol.valueDeclaration);
+                        if (!!resolveName(container.parent, symbol.name, 107455 /* Value */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined)) {
+                            // redeclaration - always should be renamed
+                            links.isDeclarationWithCollidingName = true;
+                        }
+                        else if (nodeLinks_1.flags & 131072 /* CapturedBlockScopedBinding */) {
+                            // binding is captured in the function
+                            // should be renamed if:
+                            // - binding is not top level - top level bindings never collide with anything
+                            // AND
+                            //   - binding is not declared in loop, should be renamed to avoid name reuse across siblings
+                            //     let a, b
+                            //     { let x = 1; a = () => x;  }
+                            //     { let x = 100; b = () => x; }
+                            //     console.log(a()); // should print '1'
+                            //     console.log(b()); // should print '100'
+                            //     OR
+                            //   - binding is declared inside loop but not in inside initializer of iteration statement or directly inside loop body
+                            //     * variables from initializer are passed to rewritten loop body as parameters so they are not captured directly
+                            //     * variables that are declared immediately in loop body will become top level variable after loop is rewritten and thus
+                            //       they will not collide with anything
+                            var isDeclaredInLoop = nodeLinks_1.flags & 262144 /* BlockScopedBindingInLoop */;
+                            var inLoopInitializer = ts.isIterationStatement(container, /*lookInLabeledStatements*/ false);
+                            var inLoopBodyBlock = container.kind === 207 /* Block */ && ts.isIterationStatement(container.parent, /*lookInLabeledStatements*/ false);
+                            links.isDeclarationWithCollidingName = !ts.isBlockScopedContainerTopLevel(container) && (!isDeclaredInLoop || (!inLoopInitializer && !inLoopBodyBlock));
+                        }
+                        else {
+                            links.isDeclarationWithCollidingName = false;
+                        }
                     }
                 }
+                return links.isDeclarationWithCollidingName;
             }
-            checkSourceElement(node.body);
-            if (!node.asteriskToken) {
-                var returnOrPromisedType = node.type && (isAsync ? checkAsyncFunctionReturnType(node) : getTypeFromTypeNode(node.type));
-                checkAllCodePathsInNonVoidFunctionReturnOrThrow(node, returnOrPromisedType);
-            }
-            if (produceDiagnostics && !node.type) {
-                // Report an implicit any error if there is no body, no explicit return type, and node is not a private method
-                // in an ambient context
-                if (compilerOptions.noImplicitAny && ts.nodeIsMissing(node.body) && !isPrivateWithinAmbient(node)) {
-                    reportImplicitAnyError(node, anyType);
+            return false;
+        }
+        // When resolved as an expression identifier, if the given node references a nested block scoped entity with
+        // a name that either hides an existing name or might hide it when compiled downlevel,
+        // return the declaration of that entity. Otherwise, return undefined.
+        function getReferencedDeclarationWithCollidingName(node) {
+            if (!ts.isGeneratedIdentifier(node)) {
+                node = ts.getParseTreeNode(node, ts.isIdentifier);
+                if (node) {
+                    var symbol = getReferencedValueSymbol(node);
+                    if (symbol && isSymbolOfDeclarationWithCollidingName(symbol)) {
+                        return symbol.valueDeclaration;
+                    }
                 }
-                if (node.asteriskToken && ts.nodeIsPresent(node.body)) {
-                    // A generator with a body and no type annotation can still cause errors. It can error if the
-                    // yielded values have no common supertype, or it can give an implicit any error if it has no
-                    // yielded values. The only way to trigger these errors is to try checking its return type.
-                    getReturnTypeOfSignature(getSignatureFromDeclaration(node));
+            }
+            return undefined;
+        }
+        // Return true if the given node is a declaration of a nested block scoped entity with a name that either hides an
+        // existing name or might hide a name when compiled downlevel
+        function isDeclarationWithCollidingName(node) {
+            node = ts.getParseTreeNode(node, ts.isDeclaration);
+            if (node) {
+                var symbol = getSymbolOfNode(node);
+                if (symbol) {
+                    return isSymbolOfDeclarationWithCollidingName(symbol);
                 }
             }
-            registerForUnusedIdentifiersCheck(node);
+            return false;
         }
-        function registerForUnusedIdentifiersCheck(node) {
-            if (deferredUnusedIdentifierNodes) {
-                deferredUnusedIdentifierNodes.push(node);
+        function isValueAliasDeclaration(node) {
+            switch (node.kind) {
+                case 237 /* ImportEqualsDeclaration */:
+                case 239 /* ImportClause */:
+                case 240 /* NamespaceImport */:
+                case 242 /* ImportSpecifier */:
+                case 246 /* ExportSpecifier */:
+                    return isAliasResolvedToValue(getSymbolOfNode(node) || unknownSymbol);
+                case 244 /* ExportDeclaration */:
+                    var exportClause = node.exportClause;
+                    return exportClause && ts.forEach(exportClause.elements, isValueAliasDeclaration);
+                case 243 /* ExportAssignment */:
+                    return node.expression
+                        && node.expression.kind === 71 /* Identifier */
+                        ? isAliasResolvedToValue(getSymbolOfNode(node) || unknownSymbol)
+                        : true;
             }
+            return false;
         }
-        function checkUnusedIdentifiers() {
-            if (deferredUnusedIdentifierNodes) {
-                for (var _i = 0, deferredUnusedIdentifierNodes_1 = deferredUnusedIdentifierNodes; _i < deferredUnusedIdentifierNodes_1.length; _i++) {
-                    var node = deferredUnusedIdentifierNodes_1[_i];
-                    switch (node.kind) {
-                        case 256 /* SourceFile */:
-                        case 225 /* ModuleDeclaration */:
-                            checkUnusedModuleMembers(node);
-                            break;
-                        case 221 /* ClassDeclaration */:
-                        case 192 /* ClassExpression */:
-                            checkUnusedClassMembers(node);
-                            checkUnusedTypeParameters(node);
-                            break;
-                        case 222 /* InterfaceDeclaration */:
-                            checkUnusedTypeParameters(node);
-                            break;
-                        case 199 /* Block */:
-                        case 227 /* CaseBlock */:
-                        case 206 /* ForStatement */:
-                        case 207 /* ForInStatement */:
-                        case 208 /* ForOfStatement */:
-                            checkUnusedLocalsAndParameters(node);
-                            break;
-                        case 148 /* Constructor */:
-                        case 179 /* FunctionExpression */:
-                        case 220 /* FunctionDeclaration */:
-                        case 180 /* ArrowFunction */:
-                        case 147 /* MethodDeclaration */:
-                        case 149 /* GetAccessor */:
-                        case 150 /* SetAccessor */:
-                            if (node.body) {
-                                checkUnusedLocalsAndParameters(node);
-                            }
-                            checkUnusedTypeParameters(node);
-                            break;
-                        case 146 /* MethodSignature */:
-                        case 151 /* CallSignature */:
-                        case 152 /* ConstructSignature */:
-                        case 153 /* IndexSignature */:
-                        case 156 /* FunctionType */:
-                        case 157 /* ConstructorType */:
-                            checkUnusedTypeParameters(node);
-                            break;
-                    }
-                    ;
-                }
+        function isTopLevelValueImportEqualsWithEntityName(node) {
+            node = ts.getParseTreeNode(node, ts.isImportEqualsDeclaration);
+            if (node === undefined || node.parent.kind !== 265 /* SourceFile */ || !ts.isInternalModuleImportEqualsDeclaration(node)) {
+                // parent is not source file or it is not reference to internal module
+                return false;
             }
+            var isValue = isAliasResolvedToValue(getSymbolOfNode(node));
+            return isValue && node.moduleReference && !ts.nodeIsMissing(node.moduleReference);
         }
-        function checkUnusedLocalsAndParameters(node) {
-            if (node.parent.kind !== 222 /* InterfaceDeclaration */ && noUnusedIdentifiers && !ts.isInAmbientContext(node)) {
-                var _loop_1 = function (key) {
-                    var local = node.locals[key];
-                    if (!local.isReferenced) {
-                        if (local.valueDeclaration && local.valueDeclaration.kind === 142 /* Parameter */) {
-                            var parameter = local.valueDeclaration;
-                            if (compilerOptions.noUnusedParameters &&
-                                !ts.isParameterPropertyDeclaration(parameter) &&
-                                !parameterIsThisKeyword(parameter) &&
-                                !parameterNameStartsWithUnderscore(parameter)) {
-                                error(local.valueDeclaration.name, ts.Diagnostics._0_is_declared_but_never_used, local.name);
-                            }
-                        }
-                        else if (compilerOptions.noUnusedLocals) {
-                            ts.forEach(local.declarations, function (d) { return error(d.name || d, ts.Diagnostics._0_is_declared_but_never_used, local.name); });
-                        }
-                    }
-                };
-                for (var key in node.locals) {
-                    _loop_1(key);
+        function isAliasResolvedToValue(symbol) {
+            var target = resolveAlias(symbol);
+            if (target === unknownSymbol) {
+                return true;
+            }
+            // const enums and modules that contain only const enums are not considered values from the emit perspective
+            // unless 'preserveConstEnums' option is set to true
+            return target.flags & 107455 /* Value */ &&
+                (compilerOptions.preserveConstEnums || !isConstEnumOrConstEnumOnlyModule(target));
+        }
+        function isConstEnumOrConstEnumOnlyModule(s) {
+            return isConstEnumSymbol(s) || s.constEnumOnlyModule;
+        }
+        function isReferencedAliasDeclaration(node, checkChildren) {
+            if (ts.isAliasSymbolDeclaration(node)) {
+                var symbol = getSymbolOfNode(node);
+                if (symbol && getSymbolLinks(symbol).referenced) {
+                    return true;
                 }
             }
+            if (checkChildren) {
+                return ts.forEachChild(node, function (node) { return isReferencedAliasDeclaration(node, checkChildren); });
+            }
+            return false;
+        }
+        function isImplementationOfOverload(node) {
+            if (ts.nodeIsPresent(node.body)) {
+                var symbol = getSymbolOfNode(node);
+                var signaturesOfSymbol = getSignaturesOfSymbol(symbol);
+                // If this function body corresponds to function with multiple signature, it is implementation of overload
+                // e.g.: function foo(a: string): string;
+                //       function foo(a: number): number;
+                //       function foo(a: any) { // This is implementation of the overloads
+                //           return a;
+                //       }
+                return signaturesOfSymbol.length > 1 ||
+                    // If there is single signature for the symbol, it is overload if that signature isn't coming from the node
+                    // e.g.: function foo(a: string): string;
+                    //       function foo(a: any) { // This is implementation of the overloads
+                    //           return a;
+                    //       }
+                    (signaturesOfSymbol.length === 1 && signaturesOfSymbol[0].declaration !== node);
+            }
+            return false;
         }
-        function parameterIsThisKeyword(parameter) {
-            return parameter.name && parameter.name.originalKeywordKind === 97 /* ThisKeyword */;
+        function isRequiredInitializedParameter(parameter) {
+            return strictNullChecks &&
+                !isOptionalParameter(parameter) &&
+                parameter.initializer &&
+                !(ts.getModifierFlags(parameter) & 92 /* ParameterPropertyModifier */);
         }
-        function parameterNameStartsWithUnderscore(parameter) {
-            return parameter.name && parameter.name.kind === 69 /* Identifier */ && parameter.name.text.charCodeAt(0) === 95 /* _ */;
+        function isOptionalUninitializedParameterProperty(parameter) {
+            return strictNullChecks &&
+                isOptionalParameter(parameter) &&
+                !parameter.initializer &&
+                !!(ts.getModifierFlags(parameter) & 92 /* ParameterPropertyModifier */);
         }
-        function checkUnusedClassMembers(node) {
-            if (compilerOptions.noUnusedLocals && !ts.isInAmbientContext(node)) {
-                if (node.members) {
-                    for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
-                        var member = _a[_i];
-                        if (member.kind === 147 /* MethodDeclaration */ || member.kind === 145 /* PropertyDeclaration */) {
-                            if (!member.symbol.isReferenced && ts.getModifierFlags(member) & 8 /* Private */) {
-                                error(member.name, ts.Diagnostics._0_is_declared_but_never_used, member.symbol.name);
-                            }
-                        }
-                        else if (member.kind === 148 /* Constructor */) {
-                            for (var _b = 0, _c = member.parameters; _b < _c.length; _b++) {
-                                var parameter = _c[_b];
-                                if (!parameter.symbol.isReferenced && ts.getModifierFlags(parameter) & 8 /* Private */) {
-                                    error(parameter.name, ts.Diagnostics.Property_0_is_declared_but_never_used, parameter.symbol.name);
-                                }
-                            }
-                        }
-                    }
-                }
-            }
+        function getNodeCheckFlags(node) {
+            return getNodeLinks(node).flags;
         }
-        function checkUnusedTypeParameters(node) {
-            if (compilerOptions.noUnusedLocals && !ts.isInAmbientContext(node)) {
-                if (node.typeParameters) {
-                    // Only report errors on the last declaration for the type parameter container;
-                    // this ensures that all uses have been accounted for.
-                    var symbol = getSymbolOfNode(node);
-                    var lastDeclaration = symbol && symbol.declarations && ts.lastOrUndefined(symbol.declarations);
-                    if (lastDeclaration !== node) {
-                        return;
-                    }
-                    for (var _i = 0, _a = node.typeParameters; _i < _a.length; _i++) {
-                        var typeParameter = _a[_i];
-                        if (!getMergedSymbol(typeParameter.symbol).isReferenced) {
-                            error(typeParameter.name, ts.Diagnostics._0_is_declared_but_never_used, typeParameter.symbol.name);
-                        }
-                    }
-                }
-            }
+        function getEnumMemberValue(node) {
+            computeEnumMemberValues(node.parent);
+            return getNodeLinks(node).enumMemberValue;
         }
-        function checkUnusedModuleMembers(node) {
-            if (compilerOptions.noUnusedLocals && !ts.isInAmbientContext(node)) {
-                for (var key in node.locals) {
-                    var local = node.locals[key];
-                    if (!local.isReferenced && !local.exportSymbol) {
-                        for (var _i = 0, _a = local.declarations; _i < _a.length; _i++) {
-                            var declaration = _a[_i];
-                            if (!ts.isAmbientModule(declaration)) {
-                                error(declaration.name, ts.Diagnostics._0_is_declared_but_never_used, local.name);
-                            }
-                        }
-                    }
-                }
+        function canHaveConstantValue(node) {
+            switch (node.kind) {
+                case 264 /* EnumMember */:
+                case 179 /* PropertyAccessExpression */:
+                case 180 /* ElementAccessExpression */:
+                    return true;
             }
+            return false;
         }
-        function checkBlock(node) {
-            // Grammar checking for SyntaxKind.Block
-            if (node.kind === 199 /* Block */) {
-                checkGrammarStatementInAmbientContext(node);
+        function getConstantValue(node) {
+            if (node.kind === 264 /* EnumMember */) {
+                return getEnumMemberValue(node);
             }
-            ts.forEach(node.statements, checkSourceElement);
-            if (node.locals) {
-                registerForUnusedIdentifiersCheck(node);
+            var symbol = getNodeLinks(node).resolvedSymbol;
+            if (symbol && (symbol.flags & 8 /* EnumMember */)) {
+                // inline property\index accesses only for const enums
+                if (ts.isConstEnumDeclaration(symbol.valueDeclaration.parent)) {
+                    return getEnumMemberValue(symbol.valueDeclaration);
+                }
             }
+            return undefined;
         }
-        function checkCollisionWithArgumentsInGeneratedCode(node) {
-            // no rest parameters \ declaration context \ overload - no codegen impact
-            if (!ts.hasDeclaredRestParameter(node) || ts.isInAmbientContext(node) || ts.nodeIsMissing(node.body)) {
-                return;
-            }
-            ts.forEach(node.parameters, function (p) {
-                if (p.name && !ts.isBindingPattern(p.name) && p.name.text === argumentsSymbol.name) {
-                    error(p, ts.Diagnostics.Duplicate_identifier_arguments_Compiler_uses_arguments_to_initialize_rest_parameters);
-                }
-            });
+        function isFunctionType(type) {
+            return type.flags & 32768 /* Object */ && getSignaturesOfType(type, 0 /* Call */).length > 0;
         }
-        function needCollisionCheckForIdentifier(node, identifier, name) {
-            if (!(identifier && identifier.text === name)) {
-                return false;
+        function getTypeReferenceSerializationKind(typeName, location) {
+            // Resolve the symbol as a value to ensure the type can be reached at runtime during emit.
+            var valueSymbol = resolveEntityName(typeName, 107455 /* Value */, /*ignoreErrors*/ true, /*dontResolveAlias*/ false, location);
+            // Resolve the symbol as a type so that we can provide a more useful hint for the type serializer.
+            var typeSymbol = resolveEntityName(typeName, 793064 /* Type */, /*ignoreErrors*/ true, /*dontResolveAlias*/ false, location);
+            if (valueSymbol && valueSymbol === typeSymbol) {
+                var globalPromiseSymbol = getGlobalPromiseConstructorSymbol(/*reportErrors*/ false);
+                if (globalPromiseSymbol && valueSymbol === globalPromiseSymbol) {
+                    return ts.TypeReferenceSerializationKind.Promise;
+                }
+                var constructorType = getTypeOfSymbol(valueSymbol);
+                if (constructorType && isConstructorType(constructorType)) {
+                    return ts.TypeReferenceSerializationKind.TypeWithConstructSignatureAndValue;
+                }
             }
-            if (node.kind === 145 /* PropertyDeclaration */ ||
-                node.kind === 144 /* PropertySignature */ ||
-                node.kind === 147 /* MethodDeclaration */ ||
-                node.kind === 146 /* MethodSignature */ ||
-                node.kind === 149 /* GetAccessor */ ||
-                node.kind === 150 /* SetAccessor */) {
-                // it is ok to have member named '_super' or '_this' - member access is always qualified
-                return false;
+            // We might not be able to resolve type symbol so use unknown type in that case (eg error case)
+            if (!typeSymbol) {
+                return ts.TypeReferenceSerializationKind.ObjectType;
             }
-            if (ts.isInAmbientContext(node)) {
-                // ambient context - no codegen impact
-                return false;
+            var type = getDeclaredTypeOfSymbol(typeSymbol);
+            if (type === unknownType) {
+                return ts.TypeReferenceSerializationKind.Unknown;
             }
-            var root = ts.getRootDeclaration(node);
-            if (root.kind === 142 /* Parameter */ && ts.nodeIsMissing(root.parent.body)) {
-                // just an overload - no codegen impact
-                return false;
+            else if (type.flags & 1 /* Any */) {
+                return ts.TypeReferenceSerializationKind.ObjectType;
             }
-            return true;
-        }
-        function checkCollisionWithCapturedThisVariable(node, name) {
-            if (needCollisionCheckForIdentifier(node, name, "_this")) {
-                potentialThisCollisions.push(node);
+            else if (isTypeOfKind(type, 1024 /* Void */ | 6144 /* Nullable */ | 8192 /* Never */)) {
+                return ts.TypeReferenceSerializationKind.VoidNullableOrNeverType;
             }
-        }
-        // this function will run after checking the source file so 'CaptureThis' is correct for all nodes
-        function checkIfThisIsCapturedInEnclosingScope(node) {
-            var current = node;
-            while (current) {
-                if (getNodeCheckFlags(current) & 4 /* CaptureThis */) {
-                    var isDeclaration_1 = node.kind !== 69 /* Identifier */;
-                    if (isDeclaration_1) {
-                        error(node.name, ts.Diagnostics.Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference);
-                    }
-                    else {
-                        error(node, ts.Diagnostics.Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference);
-                    }
-                    return;
-                }
-                current = current.parent;
+            else if (isTypeOfKind(type, 136 /* BooleanLike */)) {
+                return ts.TypeReferenceSerializationKind.BooleanType;
             }
-        }
-        function checkCollisionWithCapturedSuperVariable(node, name) {
-            if (!needCollisionCheckForIdentifier(node, name, "_super")) {
-                return;
+            else if (isTypeOfKind(type, 84 /* NumberLike */)) {
+                return ts.TypeReferenceSerializationKind.NumberLikeType;
             }
-            // bubble up and find containing type
-            var enclosingClass = ts.getContainingClass(node);
-            // if containing type was not found or it is ambient - exit (no codegen)
-            if (!enclosingClass || ts.isInAmbientContext(enclosingClass)) {
-                return;
+            else if (isTypeOfKind(type, 262178 /* StringLike */)) {
+                return ts.TypeReferenceSerializationKind.StringLikeType;
             }
-            if (ts.getClassExtendsHeritageClauseElement(enclosingClass)) {
-                var isDeclaration_2 = node.kind !== 69 /* Identifier */;
-                if (isDeclaration_2) {
-                    error(node, ts.Diagnostics.Duplicate_identifier_super_Compiler_uses_super_to_capture_base_class_reference);
-                }
-                else {
-                    error(node, ts.Diagnostics.Expression_resolves_to_super_that_compiler_uses_to_capture_base_class_reference);
-                }
+            else if (isTupleType(type)) {
+                return ts.TypeReferenceSerializationKind.ArrayLikeType;
             }
-        }
-        function checkCollisionWithRequireExportsInGeneratedCode(node, name) {
-            // No need to check for require or exports for ES6 modules and later
-            if (modulekind >= ts.ModuleKind.ES6) {
-                return;
+            else if (isTypeOfKind(type, 512 /* ESSymbol */)) {
+                return ts.TypeReferenceSerializationKind.ESSymbolType;
             }
-            if (!needCollisionCheckForIdentifier(node, name, "require") && !needCollisionCheckForIdentifier(node, name, "exports")) {
-                return;
+            else if (isFunctionType(type)) {
+                return ts.TypeReferenceSerializationKind.TypeWithCallSignature;
             }
-            // Uninstantiated modules shouldnt do this check
-            if (node.kind === 225 /* ModuleDeclaration */ && ts.getModuleInstanceState(node) !== 1 /* Instantiated */) {
-                return;
+            else if (isArrayType(type)) {
+                return ts.TypeReferenceSerializationKind.ArrayLikeType;
             }
-            // In case of variable declaration, node.parent is variable statement so look at the variable statement's parent
-            var parent = getDeclarationContainer(node);
-            if (parent.kind === 256 /* SourceFile */ && ts.isExternalOrCommonJsModule(parent)) {
-                // If the declaration happens to be in external module, report error that require and exports are reserved keywords
-                error(name, ts.Diagnostics.Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module, ts.declarationNameToString(name), ts.declarationNameToString(name));
+            else {
+                return ts.TypeReferenceSerializationKind.ObjectType;
             }
         }
-        function checkCollisionWithGlobalPromiseInGeneratedCode(node, name) {
-            if (!needCollisionCheckForIdentifier(node, name, "Promise")) {
-                return;
-            }
-            // Uninstantiated modules shouldnt do this check
-            if (node.kind === 225 /* ModuleDeclaration */ && ts.getModuleInstanceState(node) !== 1 /* Instantiated */) {
-                return;
-            }
-            // In case of variable declaration, node.parent is variable statement so look at the variable statement's parent
-            var parent = getDeclarationContainer(node);
-            if (parent.kind === 256 /* SourceFile */ && ts.isExternalOrCommonJsModule(parent) && parent.flags & 8192 /* HasAsyncFunctions */) {
-                // If the declaration happens to be in external module, report error that Promise is a reserved identifier.
-                error(name, ts.Diagnostics.Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_containing_async_functions, ts.declarationNameToString(name), ts.declarationNameToString(name));
+        function writeTypeOfDeclaration(declaration, enclosingDeclaration, flags, writer) {
+            // Get type of the symbol if this is the valid symbol otherwise get type at location
+            var symbol = getSymbolOfNode(declaration);
+            var type = symbol && !(symbol.flags & (2048 /* TypeLiteral */ | 131072 /* Signature */))
+                ? getWidenedLiteralType(getTypeOfSymbol(symbol))
+                : unknownType;
+            if (flags & 8192 /* AddUndefined */) {
+                type = getNullableType(type, 2048 /* Undefined */);
             }
+            getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
         }
-        function checkVarDeclaredNamesNotShadowed(node) {
-            // - ScriptBody : StatementList
-            // It is a Syntax Error if any element of the LexicallyDeclaredNames of StatementList
-            // also occurs in the VarDeclaredNames of StatementList.
-            // - Block : { StatementList }
-            // It is a Syntax Error if any element of the LexicallyDeclaredNames of StatementList
-            // also occurs in the VarDeclaredNames of StatementList.
-            // Variable declarations are hoisted to the top of their function scope. They can shadow
-            // block scoped declarations, which bind tighter. this will not be flagged as duplicate definition
-            // by the binder as the declaration scope is different.
-            // A non-initialized declaration is a no-op as the block declaration will resolve before the var
-            // declaration. the problem is if the declaration has an initializer. this will act as a write to the
-            // block declared value. this is fine for let, but not const.
-            // Only consider declarations with initializers, uninitialized const declarations will not
-            // step on a let/const variable.
-            // Do not consider const and const declarations, as duplicate block-scoped declarations
-            // are handled by the binder.
-            // We are only looking for const declarations that step on let\const declarations from a
-            // different scope. e.g.:
-            //      {
-            //          const x = 0; // localDeclarationSymbol obtained after name resolution will correspond to this declaration
-            //          const x = 0; // symbol for this declaration will be 'symbol'
-            //      }
-            // skip block-scoped variables and parameters
-            if ((ts.getCombinedNodeFlags(node) & 3 /* BlockScoped */) !== 0 || ts.isParameterDeclaration(node)) {
-                return;
+        function writeReturnTypeOfSignatureDeclaration(signatureDeclaration, enclosingDeclaration, flags, writer) {
+            var signature = getSignatureFromDeclaration(signatureDeclaration);
+            getSymbolDisplayBuilder().buildTypeDisplay(getReturnTypeOfSignature(signature), writer, enclosingDeclaration, flags);
+        }
+        function writeTypeOfExpression(expr, enclosingDeclaration, flags, writer) {
+            var type = getWidenedType(getRegularTypeOfExpression(expr));
+            getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
+        }
+        function hasGlobalName(name) {
+            return globals.has(name);
+        }
+        function getReferencedValueSymbol(reference, startInDeclarationContainer) {
+            var resolvedSymbol = getNodeLinks(reference).resolvedSymbol;
+            if (resolvedSymbol) {
+                return resolvedSymbol;
             }
-            // skip variable declarations that don't have initializers
-            // NOTE: in ES6 spec initializer is required in variable declarations where name is binding pattern
-            // so we'll always treat binding elements as initialized
-            if (node.kind === 218 /* VariableDeclaration */ && !node.initializer) {
-                return;
+            var location = reference;
+            if (startInDeclarationContainer) {
+                // When resolving the name of a declaration as a value, we need to start resolution
+                // at a point outside of the declaration.
+                var parent_15 = reference.parent;
+                if (ts.isDeclaration(parent_15) && reference === parent_15.name) {
+                    location = getDeclarationContainer(parent_15);
+                }
             }
-            var symbol = getSymbolOfNode(node);
-            if (symbol.flags & 1 /* FunctionScopedVariable */) {
-                var localDeclarationSymbol = resolveName(node, node.name.text, 3 /* Variable */, /*nodeNotFoundErrorMessage*/ undefined, /*nameArg*/ undefined);
-                if (localDeclarationSymbol &&
-                    localDeclarationSymbol !== symbol &&
-                    localDeclarationSymbol.flags & 2 /* BlockScopedVariable */) {
-                    if (getDeclarationNodeFlagsFromSymbol(localDeclarationSymbol) & 3 /* BlockScoped */) {
-                        var varDeclList = ts.getAncestor(localDeclarationSymbol.valueDeclaration, 219 /* VariableDeclarationList */);
-                        var container = varDeclList.parent.kind === 200 /* VariableStatement */ && varDeclList.parent.parent
-                            ? varDeclList.parent.parent
-                            : undefined;
-                        // names of block-scoped and function scoped variables can collide only
-                        // if block scoped variable is defined in the function\module\source file scope (because of variable hoisting)
-                        var namesShareScope = container &&
-                            (container.kind === 199 /* Block */ && ts.isFunctionLike(container.parent) ||
-                                container.kind === 226 /* ModuleBlock */ ||
-                                container.kind === 225 /* ModuleDeclaration */ ||
-                                container.kind === 256 /* SourceFile */);
-                        // here we know that function scoped variable is shadowed by block scoped one
-                        // if they are defined in the same scope - binder has already reported redeclaration error
-                        // otherwise if variable has an initializer - show error that initialization will fail
-                        // since LHS will be block scoped name instead of function scoped
-                        if (!namesShareScope) {
-                            var name_20 = symbolToString(localDeclarationSymbol);
-                            error(node, ts.Diagnostics.Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1, name_20, name_20);
-                        }
+            return resolveName(location, reference.text, 107455 /* Value */ | 1048576 /* ExportValue */ | 8388608 /* Alias */, /*nodeNotFoundMessage*/ undefined, /*nameArg*/ undefined);
+        }
+        function getReferencedValueDeclaration(reference) {
+            if (!ts.isGeneratedIdentifier(reference)) {
+                reference = ts.getParseTreeNode(reference, ts.isIdentifier);
+                if (reference) {
+                    var symbol = getReferencedValueSymbol(reference);
+                    if (symbol) {
+                        return getExportSymbolOfValueSymbolIfExported(symbol).valueDeclaration;
                     }
                 }
             }
+            return undefined;
         }
-        // Check that a parameter initializer contains no references to parameters declared to the right of itself
-        function checkParameterInitializer(node) {
-            if (ts.getRootDeclaration(node).kind !== 142 /* Parameter */) {
-                return;
+        function isLiteralConstDeclaration(node) {
+            if (ts.isConst(node)) {
+                var type = getTypeOfSymbol(getSymbolOfNode(node));
+                return !!(type.flags & 96 /* StringOrNumberLiteral */ && type.flags & 1048576 /* FreshLiteral */);
             }
-            var func = ts.getContainingFunction(node);
-            visit(node.initializer);
-            function visit(n) {
-                if (ts.isTypeNode(n) || ts.isDeclarationName(n)) {
-                    // do not dive in types
-                    // skip declaration names (i.e. in object literal expressions)
-                    return;
-                }
-                if (n.kind === 172 /* PropertyAccessExpression */) {
-                    // skip property names in property access expression
-                    return visit(n.expression);
-                }
-                else if (n.kind === 69 /* Identifier */) {
-                    // check FunctionLikeDeclaration.locals (stores parameters\function local variable)
-                    // if it contains entry with a specified name
-                    var symbol = resolveName(n, n.text, 107455 /* Value */ | 8388608 /* Alias */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined);
-                    if (!symbol || symbol === unknownSymbol || !symbol.valueDeclaration) {
-                        return;
-                    }
-                    if (symbol.valueDeclaration === node) {
-                        error(n, ts.Diagnostics.Parameter_0_cannot_be_referenced_in_its_initializer, ts.declarationNameToString(node.name));
+            return false;
+        }
+        function writeLiteralConstValue(node, writer) {
+            var type = getTypeOfSymbol(getSymbolOfNode(node));
+            writer.writeStringLiteral(literalTypeToString(type));
+        }
+        function createResolver() {
+            // this variable and functions that use it are deliberately moved here from the outer scope
+            // to avoid scope pollution
+            var resolvedTypeReferenceDirectives = host.getResolvedTypeReferenceDirectives();
+            var fileToDirective;
+            if (resolvedTypeReferenceDirectives) {
+                // populate reverse mapping: file path -> type reference directive that was resolved to this file
+                fileToDirective = ts.createFileMap();
+                resolvedTypeReferenceDirectives.forEach(function (resolvedDirective, key) {
+                    if (!resolvedDirective) {
                         return;
                     }
-                    // locals map for function contain both parameters and function locals
-                    // so we need to do a bit of extra work to check if reference is legal
-                    var enclosingContainer = ts.getEnclosingBlockScopeContainer(symbol.valueDeclaration);
-                    if (enclosingContainer === func) {
-                        if (symbol.valueDeclaration.kind === 142 /* Parameter */) {
-                            // it is ok to reference parameter in initializer if either
-                            // - parameter is located strictly on the left of current parameter declaration
-                            if (symbol.valueDeclaration.pos < node.pos) {
-                                return;
-                            }
-                            // - parameter is wrapped in function-like entity
-                            var current = n;
-                            while (current !== node.initializer) {
-                                if (ts.isFunctionLike(current.parent)) {
-                                    return;
-                                }
-                                // computed property names/initializers in instance property declaration of class like entities
-                                // are executed in constructor and thus deferred
-                                if (current.parent.kind === 145 /* PropertyDeclaration */ &&
-                                    !(ts.hasModifier(current.parent, 32 /* Static */)) &&
-                                    ts.isClassLike(current.parent.parent)) {
-                                    return;
-                                }
-                                current = current.parent;
-                            }
-                        }
-                        error(n, ts.Diagnostics.Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it, ts.declarationNameToString(node.name), ts.declarationNameToString(n));
-                    }
-                }
-                else {
-                    return ts.forEachChild(n, visit);
-                }
+                    var file = host.getSourceFile(resolvedDirective.resolvedFileName);
+                    fileToDirective.set(file.path, key);
+                });
             }
-        }
-        // Check variable, parameter, or property declaration
-        function checkVariableLikeDeclaration(node) {
-            checkDecorators(node);
-            checkSourceElement(node.type);
-            // For a computed property, just check the initializer and exit
-            // Do not use hasDynamicName here, because that returns false for well known symbols.
-            // We want to perform checkComputedPropertyName for all computed properties, including
-            // well known symbols.
-            if (node.name.kind === 140 /* ComputedPropertyName */) {
-                checkComputedPropertyName(node.name);
-                if (node.initializer) {
-                    checkExpressionCached(node.initializer);
+            return {
+                getReferencedExportContainer: getReferencedExportContainer,
+                getReferencedImportDeclaration: getReferencedImportDeclaration,
+                getReferencedDeclarationWithCollidingName: getReferencedDeclarationWithCollidingName,
+                isDeclarationWithCollidingName: isDeclarationWithCollidingName,
+                isValueAliasDeclaration: function (node) {
+                    node = ts.getParseTreeNode(node);
+                    // Synthesized nodes are always treated like values.
+                    return node ? isValueAliasDeclaration(node) : true;
+                },
+                hasGlobalName: hasGlobalName,
+                isReferencedAliasDeclaration: function (node, checkChildren) {
+                    node = ts.getParseTreeNode(node);
+                    // Synthesized nodes are always treated as referenced.
+                    return node ? isReferencedAliasDeclaration(node, checkChildren) : true;
+                },
+                getNodeCheckFlags: function (node) {
+                    node = ts.getParseTreeNode(node);
+                    return node ? getNodeCheckFlags(node) : undefined;
+                },
+                isTopLevelValueImportEqualsWithEntityName: isTopLevelValueImportEqualsWithEntityName,
+                isDeclarationVisible: isDeclarationVisible,
+                isImplementationOfOverload: isImplementationOfOverload,
+                isRequiredInitializedParameter: isRequiredInitializedParameter,
+                isOptionalUninitializedParameterProperty: isOptionalUninitializedParameterProperty,
+                writeTypeOfDeclaration: writeTypeOfDeclaration,
+                writeReturnTypeOfSignatureDeclaration: writeReturnTypeOfSignatureDeclaration,
+                writeTypeOfExpression: writeTypeOfExpression,
+                isSymbolAccessible: isSymbolAccessible,
+                isEntityNameVisible: isEntityNameVisible,
+                getConstantValue: function (node) {
+                    node = ts.getParseTreeNode(node, canHaveConstantValue);
+                    return node ? getConstantValue(node) : undefined;
+                },
+                collectLinkedAliases: collectLinkedAliases,
+                getReferencedValueDeclaration: getReferencedValueDeclaration,
+                getTypeReferenceSerializationKind: getTypeReferenceSerializationKind,
+                isOptionalParameter: isOptionalParameter,
+                moduleExportsSomeValue: moduleExportsSomeValue,
+                isArgumentsLocalBinding: isArgumentsLocalBinding,
+                getExternalModuleFileFromDeclaration: getExternalModuleFileFromDeclaration,
+                getTypeReferenceDirectivesForEntityName: getTypeReferenceDirectivesForEntityName,
+                getTypeReferenceDirectivesForSymbol: getTypeReferenceDirectivesForSymbol,
+                isLiteralConstDeclaration: isLiteralConstDeclaration,
+                writeLiteralConstValue: writeLiteralConstValue,
+                getJsxFactoryEntity: function () { return _jsxFactoryEntity; }
+            };
+            // defined here to avoid outer scope pollution
+            function getTypeReferenceDirectivesForEntityName(node) {
+                // program does not have any files with type reference directives - bail out
+                if (!fileToDirective) {
+                    return undefined;
                 }
+                // property access can only be used as values
+                // qualified names can only be used as types\namespaces
+                // identifiers are treated as values only if they appear in type queries
+                var meaning = (node.kind === 179 /* PropertyAccessExpression */) || (node.kind === 71 /* Identifier */ && isInTypeQuery(node))
+                    ? 107455 /* Value */ | 1048576 /* ExportValue */
+                    : 793064 /* Type */ | 1920 /* Namespace */;
+                var symbol = resolveEntityName(node, meaning, /*ignoreErrors*/ true);
+                return symbol && symbol !== unknownSymbol ? getTypeReferenceDirectivesForSymbol(symbol, meaning) : undefined;
             }
-            if (node.kind === 169 /* BindingElement */) {
-                // check computed properties inside property names of binding elements
-                if (node.propertyName && node.propertyName.kind === 140 /* ComputedPropertyName */) {
-                    checkComputedPropertyName(node.propertyName);
-                }
-                // check private/protected variable access
-                var parent_13 = node.parent.parent;
-                var parentType = getTypeForBindingElementParent(parent_13);
-                var name_21 = node.propertyName || node.name;
-                var property = getPropertyOfType(parentType, getTextOfPropertyName(name_21));
-                if (parent_13.initializer && property && getParentOfSymbol(property)) {
-                    checkClassPropertyAccess(parent_13, parent_13.initializer, parentType, property);
+            // defined here to avoid outer scope pollution
+            function getTypeReferenceDirectivesForSymbol(symbol, meaning) {
+                // program does not have any files with type reference directives - bail out
+                if (!fileToDirective) {
+                    return undefined;
                 }
-            }
-            // For a binding pattern, check contained binding elements
-            if (ts.isBindingPattern(node.name)) {
-                ts.forEach(node.name.elements, checkSourceElement);
-            }
-            // For a parameter declaration with an initializer, error and exit if the containing function doesn't have a body
-            if (node.initializer && ts.getRootDeclaration(node).kind === 142 /* Parameter */ && ts.nodeIsMissing(ts.getContainingFunction(node).body)) {
-                error(node, ts.Diagnostics.A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation);
-                return;
-            }
-            // For a binding pattern, validate the initializer and exit
-            if (ts.isBindingPattern(node.name)) {
-                // Don't validate for-in initializer as it is already an error
-                if (node.initializer && node.parent.parent.kind !== 207 /* ForInStatement */) {
-                    checkTypeAssignableTo(checkExpressionCached(node.initializer), getWidenedTypeForVariableLikeDeclaration(node), node, /*headMessage*/ undefined);
-                    checkParameterInitializer(node);
+                if (!isSymbolFromTypeDeclarationFile(symbol)) {
+                    return undefined;
                 }
-                return;
-            }
-            var symbol = getSymbolOfNode(node);
-            var type = getTypeOfVariableOrParameterOrProperty(symbol);
-            if (node === symbol.valueDeclaration) {
-                // Node is the primary declaration of the symbol, just validate the initializer
-                // Don't validate for-in initializer as it is already an error
-                if (node.initializer && node.parent.parent.kind !== 207 /* ForInStatement */) {
-                    checkTypeAssignableTo(checkExpressionCached(node.initializer), type, node, /*headMessage*/ undefined);
-                    checkParameterInitializer(node);
+                // check what declarations in the symbol can contribute to the target meaning
+                var typeReferenceDirectives;
+                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                    var decl = _a[_i];
+                    // check meaning of the local symbol to see if declaration needs to be analyzed further
+                    if (decl.symbol && decl.symbol.flags & meaning) {
+                        var file = ts.getSourceFileOfNode(decl);
+                        var typeReferenceDirective = fileToDirective.get(file.path);
+                        if (typeReferenceDirective) {
+                            (typeReferenceDirectives || (typeReferenceDirectives = [])).push(typeReferenceDirective);
+                        }
+                        else {
+                            // found at least one entry that does not originate from type reference directive
+                            return undefined;
+                        }
+                    }
                 }
+                return typeReferenceDirectives;
             }
-            else {
-                // Node is a secondary declaration, check that type is identical to primary declaration and check that
-                // initializer is consistent with type associated with the node
-                var declarationType = getWidenedTypeForVariableLikeDeclaration(node);
-                if (type !== unknownType && declarationType !== unknownType && !isTypeIdenticalTo(type, declarationType)) {
-                    error(node.name, ts.Diagnostics.Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_type_2, ts.declarationNameToString(node.name), typeToString(type), typeToString(declarationType));
+            function isSymbolFromTypeDeclarationFile(symbol) {
+                // bail out if symbol does not have associated declarations (i.e. this is transient symbol created for property in binding pattern)
+                if (!symbol.declarations) {
+                    return false;
                 }
-                if (node.initializer) {
-                    checkTypeAssignableTo(checkExpressionCached(node.initializer), declarationType, node, /*headMessage*/ undefined);
+                // walk the parent chain for symbols to make sure that top level parent symbol is in the global scope
+                // external modules cannot define or contribute to type declaration files
+                var current = symbol;
+                while (true) {
+                    var parent_16 = getParentOfSymbol(current);
+                    if (parent_16) {
+                        current = parent_16;
+                    }
+                    else {
+                        break;
+                    }
                 }
-                if (!areDeclarationFlagsIdentical(node, symbol.valueDeclaration)) {
-                    error(symbol.valueDeclaration.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
-                    error(node.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
+                if (current.valueDeclaration && current.valueDeclaration.kind === 265 /* SourceFile */ && current.flags & 512 /* ValueModule */) {
+                    return false;
                 }
-            }
-            if (node.kind !== 145 /* PropertyDeclaration */ && node.kind !== 144 /* PropertySignature */) {
-                // We know we don't have a binding pattern or computed name here
-                checkExportsOnMergedDeclarations(node);
-                if (node.kind === 218 /* VariableDeclaration */ || node.kind === 169 /* BindingElement */) {
-                    checkVarDeclaredNamesNotShadowed(node);
+                // check that at least one declaration of top level symbol originates from type declaration file
+                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                    var decl = _a[_i];
+                    var file = ts.getSourceFileOfNode(decl);
+                    if (fileToDirective.contains(file.path)) {
+                        return true;
+                    }
                 }
-                checkCollisionWithCapturedSuperVariable(node, node.name);
-                checkCollisionWithCapturedThisVariable(node, node.name);
-                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
-                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
-            }
-        }
-        function areDeclarationFlagsIdentical(left, right) {
-            if ((left.kind === 142 /* Parameter */ && right.kind === 218 /* VariableDeclaration */) ||
-                (left.kind === 218 /* VariableDeclaration */ && right.kind === 142 /* Parameter */)) {
-                // Differences in optionality between parameters and variables are allowed.
-                return true;
-            }
-            if (ts.hasQuestionToken(left) !== ts.hasQuestionToken(right)) {
                 return false;
             }
-            var interestingFlags = 8 /* Private */ |
-                16 /* Protected */ |
-                256 /* Async */ |
-                128 /* Abstract */ |
-                64 /* Readonly */ |
-                32 /* Static */;
-            return (ts.getModifierFlags(left) & interestingFlags) === (ts.getModifierFlags(right) & interestingFlags);
-        }
-        function checkVariableDeclaration(node) {
-            checkGrammarVariableDeclaration(node);
-            return checkVariableLikeDeclaration(node);
         }
-        function checkBindingElement(node) {
-            checkGrammarBindingElement(node);
-            return checkVariableLikeDeclaration(node);
-        }
-        function checkVariableStatement(node) {
-            // Grammar checking
-            checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarVariableDeclarationList(node.declarationList) || checkGrammarForDisallowedLetOrConstStatement(node);
-            ts.forEach(node.declarationList.declarations, checkSourceElement);
+        function getExternalModuleFileFromDeclaration(declaration) {
+            var specifier = ts.getExternalModuleName(declaration);
+            var moduleSymbol = resolveExternalModuleNameWorker(specifier, specifier, /*moduleNotFoundError*/ undefined);
+            if (!moduleSymbol) {
+                return undefined;
+            }
+            return ts.getDeclarationOfKind(moduleSymbol, 265 /* SourceFile */);
         }
-        function checkGrammarDisallowedModifiersOnObjectLiteralExpressionMethod(node) {
-            // We only disallow modifier on a method declaration if it is a property of object-literal-expression
-            if (node.modifiers && node.parent.kind === 171 /* ObjectLiteralExpression */) {
-                if (ts.isAsyncFunctionLike(node)) {
-                    if (node.modifiers.length > 1) {
-                        return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
+        function initializeTypeChecker() {
+            // Bind all source files and propagate errors
+            for (var _i = 0, _a = host.getSourceFiles(); _i < _a.length; _i++) {
+                var file = _a[_i];
+                ts.bindSourceFile(file, compilerOptions);
+            }
+            // Initialize global symbol table
+            var augmentations;
+            for (var _b = 0, _c = host.getSourceFiles(); _b < _c.length; _b++) {
+                var file = _c[_b];
+                if (!ts.isExternalOrCommonJsModule(file)) {
+                    mergeSymbolTable(globals, file.locals);
+                }
+                if (file.patternAmbientModules && file.patternAmbientModules.length) {
+                    patternAmbientModules = ts.concatenate(patternAmbientModules, file.patternAmbientModules);
+                }
+                if (file.moduleAugmentations.length) {
+                    (augmentations || (augmentations = [])).push(file.moduleAugmentations);
+                }
+                if (file.symbol && file.symbol.globalExports) {
+                    // Merge in UMD exports with first-in-wins semantics (see #9771)
+                    var source = file.symbol.globalExports;
+                    source.forEach(function (sourceSymbol, id) {
+                        if (!globals.has(id)) {
+                            globals.set(id, sourceSymbol);
+                        }
+                    });
+                }
+            }
+            if (augmentations) {
+                // merge module augmentations.
+                // this needs to be done after global symbol table is initialized to make sure that all ambient modules are indexed
+                for (var _d = 0, augmentations_1 = augmentations; _d < augmentations_1.length; _d++) {
+                    var list = augmentations_1[_d];
+                    for (var _e = 0, list_1 = list; _e < list_1.length; _e++) {
+                        var augmentation = list_1[_e];
+                        mergeModuleAugmentation(augmentation);
                     }
                 }
-                else {
-                    return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
+            }
+            // Setup global builtins
+            addToSymbolTable(globals, builtinGlobals, ts.Diagnostics.Declaration_name_conflicts_with_built_in_global_identifier_0);
+            getSymbolLinks(undefinedSymbol).type = undefinedWideningType;
+            getSymbolLinks(argumentsSymbol).type = getGlobalType("IArguments", /*arity*/ 0, /*reportErrors*/ true);
+            getSymbolLinks(unknownSymbol).type = unknownType;
+            // Initialize special types
+            globalArrayType = getGlobalType("Array", /*arity*/ 1, /*reportErrors*/ true);
+            globalObjectType = getGlobalType("Object", /*arity*/ 0, /*reportErrors*/ true);
+            globalFunctionType = getGlobalType("Function", /*arity*/ 0, /*reportErrors*/ true);
+            globalStringType = getGlobalType("String", /*arity*/ 0, /*reportErrors*/ true);
+            globalNumberType = getGlobalType("Number", /*arity*/ 0, /*reportErrors*/ true);
+            globalBooleanType = getGlobalType("Boolean", /*arity*/ 0, /*reportErrors*/ true);
+            globalRegExpType = getGlobalType("RegExp", /*arity*/ 0, /*reportErrors*/ true);
+            anyArrayType = createArrayType(anyType);
+            autoArrayType = createArrayType(autoType);
+            globalReadonlyArrayType = getGlobalTypeOrUndefined("ReadonlyArray", /*arity*/ 1);
+            anyReadonlyArrayType = globalReadonlyArrayType ? createTypeFromGenericGlobalType(globalReadonlyArrayType, [anyType]) : anyArrayType;
+            globalThisType = getGlobalTypeOrUndefined("ThisType", /*arity*/ 1);
+        }
+        function checkExternalEmitHelpers(location, helpers) {
+            if ((requestedExternalEmitHelpers & helpers) !== helpers && compilerOptions.importHelpers) {
+                var sourceFile = ts.getSourceFileOfNode(location);
+                if (ts.isEffectiveExternalModule(sourceFile, compilerOptions) && !ts.isInAmbientContext(location)) {
+                    var helpersModule = resolveHelpersModule(sourceFile, location);
+                    if (helpersModule !== unknownSymbol) {
+                        var uncheckedHelpers = helpers & ~requestedExternalEmitHelpers;
+                        for (var helper = 1 /* FirstEmitHelper */; helper <= 32768 /* LastEmitHelper */; helper <<= 1) {
+                            if (uncheckedHelpers & helper) {
+                                var name_34 = getHelperName(helper);
+                                var symbol = getSymbol(helpersModule.exports, ts.escapeIdentifier(name_34), 107455 /* Value */);
+                                if (!symbol) {
+                                    error(location, ts.Diagnostics.This_syntax_requires_an_imported_helper_named_1_but_module_0_has_no_exported_member_1, ts.externalHelpersModuleNameText, name_34);
+                                }
+                            }
+                        }
+                    }
+                    requestedExternalEmitHelpers |= helpers;
                 }
             }
         }
-        function checkExpressionStatement(node) {
-            // Grammar checking
-            checkGrammarStatementInAmbientContext(node);
-            checkExpression(node.expression);
-        }
-        function checkIfStatement(node) {
-            // Grammar checking
-            checkGrammarStatementInAmbientContext(node);
-            checkExpression(node.expression);
-            checkSourceElement(node.thenStatement);
-            if (node.thenStatement.kind === 201 /* EmptyStatement */) {
-                error(node.thenStatement, ts.Diagnostics.The_body_of_an_if_statement_cannot_be_the_empty_statement);
+        function getHelperName(helper) {
+            switch (helper) {
+                case 1 /* Extends */: return "__extends";
+                case 2 /* Assign */: return "__assign";
+                case 4 /* Rest */: return "__rest";
+                case 8 /* Decorate */: return "__decorate";
+                case 16 /* Metadata */: return "__metadata";
+                case 32 /* Param */: return "__param";
+                case 64 /* Awaiter */: return "__awaiter";
+                case 128 /* Generator */: return "__generator";
+                case 256 /* Values */: return "__values";
+                case 512 /* Read */: return "__read";
+                case 1024 /* Spread */: return "__spread";
+                case 2048 /* Await */: return "__await";
+                case 4096 /* AsyncGenerator */: return "__asyncGenerator";
+                case 8192 /* AsyncDelegator */: return "__asyncDelegator";
+                case 16384 /* AsyncValues */: return "__asyncValues";
+                case 32768 /* ExportStar */: return "__exportStar";
+                default: ts.Debug.fail("Unrecognized helper");
             }
-            checkSourceElement(node.elseStatement);
-        }
-        function checkDoStatement(node) {
-            // Grammar checking
-            checkGrammarStatementInAmbientContext(node);
-            checkSourceElement(node.statement);
-            checkExpression(node.expression);
         }
-        function checkWhileStatement(node) {
-            // Grammar checking
-            checkGrammarStatementInAmbientContext(node);
-            checkExpression(node.expression);
-            checkSourceElement(node.statement);
+        function resolveHelpersModule(node, errorNode) {
+            if (!externalHelpersModule) {
+                externalHelpersModule = resolveExternalModule(node, ts.externalHelpersModuleNameText, ts.Diagnostics.This_syntax_requires_an_imported_helper_but_module_0_cannot_be_found, errorNode) || unknownSymbol;
+            }
+            return externalHelpersModule;
         }
-        function checkForStatement(node) {
-            // Grammar checking
-            if (!checkGrammarStatementInAmbientContext(node)) {
-                if (node.initializer && node.initializer.kind === 219 /* VariableDeclarationList */) {
-                    checkGrammarVariableDeclarationList(node.initializer);
-                }
+        // GRAMMAR CHECKING
+        function checkGrammarDecorators(node) {
+            if (!node.decorators) {
+                return false;
             }
-            if (node.initializer) {
-                if (node.initializer.kind === 219 /* VariableDeclarationList */) {
-                    ts.forEach(node.initializer.declarations, checkVariableDeclaration);
+            if (!ts.nodeCanBeDecorated(node)) {
+                if (node.kind === 151 /* MethodDeclaration */ && !ts.nodeIsPresent(node.body)) {
+                    return grammarErrorOnFirstToken(node, ts.Diagnostics.A_decorator_can_only_decorate_a_method_implementation_not_an_overload);
                 }
                 else {
-                    checkExpression(node.initializer);
+                    return grammarErrorOnFirstToken(node, ts.Diagnostics.Decorators_are_not_valid_here);
                 }
             }
-            if (node.condition)
-                checkExpression(node.condition);
-            if (node.incrementor)
-                checkExpression(node.incrementor);
-            checkSourceElement(node.statement);
-            if (node.locals) {
-                registerForUnusedIdentifiersCheck(node);
+            else if (node.kind === 153 /* GetAccessor */ || node.kind === 154 /* SetAccessor */) {
+                var accessors = ts.getAllAccessorDeclarations(node.parent.members, node);
+                if (accessors.firstAccessor.decorators && node === accessors.secondAccessor) {
+                    return grammarErrorOnFirstToken(node, ts.Diagnostics.Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name);
+                }
             }
+            return false;
         }
-        function checkForOfStatement(node) {
-            checkGrammarForInOrForOfStatement(node);
-            // Check the LHS and RHS
-            // If the LHS is a declaration, just check it as a variable declaration, which will in turn check the RHS
-            // via checkRightHandSideOfForOf.
-            // If the LHS is an expression, check the LHS, as a destructuring assignment or as a reference.
-            // Then check that the RHS is assignable to it.
-            if (node.initializer.kind === 219 /* VariableDeclarationList */) {
-                checkForInOrForOfVariableDeclaration(node);
+        function checkGrammarModifiers(node) {
+            var quickResult = reportObviousModifierErrors(node);
+            if (quickResult !== undefined) {
+                return quickResult;
             }
-            else {
-                var varExpr = node.initializer;
-                var iteratedType = checkRightHandSideOfForOf(node.expression);
-                // There may be a destructuring assignment on the left side
-                if (varExpr.kind === 170 /* ArrayLiteralExpression */ || varExpr.kind === 171 /* ObjectLiteralExpression */) {
-                    // iteratedType may be undefined. In this case, we still want to check the structure of
-                    // varExpr, in particular making sure it's a valid LeftHandSideExpression. But we'd like
-                    // to short circuit the type relation checking as much as possible, so we pass the unknownType.
-                    checkDestructuringAssignment(varExpr, iteratedType || unknownType);
-                }
-                else {
-                    var leftType = checkExpression(varExpr);
-                    checkReferenceExpression(varExpr, /*invalidReferenceMessage*/ ts.Diagnostics.Invalid_left_hand_side_in_for_of_statement, 
-                    /*constantVariableMessage*/ ts.Diagnostics.The_left_hand_side_of_a_for_of_statement_cannot_be_a_constant_or_a_read_only_property);
-                    // iteratedType will be undefined if the rightType was missing properties/signatures
-                    // required to get its iteratedType (like [Symbol.iterator] or next). This may be
-                    // because we accessed properties from anyType, or it may have led to an error inside
-                    // getElementTypeOfIterable.
-                    if (iteratedType) {
-                        checkTypeAssignableTo(iteratedType, leftType, varExpr, /*headMessage*/ undefined);
+            var lastStatic, lastPrivate, lastProtected, lastDeclare, lastAsync, lastReadonly;
+            var flags = 0 /* None */;
+            for (var _i = 0, _a = node.modifiers; _i < _a.length; _i++) {
+                var modifier = _a[_i];
+                if (modifier.kind !== 131 /* ReadonlyKeyword */) {
+                    if (node.kind === 148 /* PropertySignature */ || node.kind === 150 /* MethodSignature */) {
+                        return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_type_member, ts.tokenToString(modifier.kind));
+                    }
+                    if (node.kind === 157 /* IndexSignature */) {
+                        return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_an_index_signature, ts.tokenToString(modifier.kind));
                     }
                 }
-            }
-            checkSourceElement(node.statement);
-            if (node.locals) {
-                registerForUnusedIdentifiersCheck(node);
-            }
-        }
-        function checkForInStatement(node) {
-            // Grammar checking
-            checkGrammarForInOrForOfStatement(node);
-            // TypeScript 1.0 spec  (April 2014): 5.4
-            // In a 'for-in' statement of the form
-            // for (let VarDecl in Expr) Statement
-            //   VarDecl must be a variable declaration without a type annotation that declares a variable of type Any,
-            //   and Expr must be an expression of type Any, an object type, or a type parameter type.
-            if (node.initializer.kind === 219 /* VariableDeclarationList */) {
-                var variable = node.initializer.declarations[0];
-                if (variable && ts.isBindingPattern(variable.name)) {
-                    error(variable.name, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern);
+                switch (modifier.kind) {
+                    case 76 /* ConstKeyword */:
+                        if (node.kind !== 232 /* EnumDeclaration */ && node.parent.kind === 229 /* ClassDeclaration */) {
+                            return grammarErrorOnNode(node, ts.Diagnostics.A_class_member_cannot_have_the_0_keyword, ts.tokenToString(76 /* ConstKeyword */));
+                        }
+                        break;
+                    case 114 /* PublicKeyword */:
+                    case 113 /* ProtectedKeyword */:
+                    case 112 /* PrivateKeyword */:
+                        var text = visibilityToString(ts.modifierToFlag(modifier.kind));
+                        if (modifier.kind === 113 /* ProtectedKeyword */) {
+                            lastProtected = modifier;
+                        }
+                        else if (modifier.kind === 112 /* PrivateKeyword */) {
+                            lastPrivate = modifier;
+                        }
+                        if (flags & 28 /* AccessibilityModifier */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics.Accessibility_modifier_already_seen);
+                        }
+                        else if (flags & 32 /* Static */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "static");
+                        }
+                        else if (flags & 64 /* Readonly */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "readonly");
+                        }
+                        else if (flags & 256 /* Async */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "async");
+                        }
+                        else if (node.parent.kind === 234 /* ModuleBlock */ || node.parent.kind === 265 /* SourceFile */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_module_or_namespace_element, text);
+                        }
+                        else if (flags & 128 /* Abstract */) {
+                            if (modifier.kind === 112 /* PrivateKeyword */) {
+                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, text, "abstract");
+                            }
+                            else {
+                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "abstract");
+                            }
+                        }
+                        flags |= ts.modifierToFlag(modifier.kind);
+                        break;
+                    case 115 /* StaticKeyword */:
+                        if (flags & 32 /* Static */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "static");
+                        }
+                        else if (flags & 64 /* Readonly */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "static", "readonly");
+                        }
+                        else if (flags & 256 /* Async */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "static", "async");
+                        }
+                        else if (node.parent.kind === 234 /* ModuleBlock */ || node.parent.kind === 265 /* SourceFile */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_module_or_namespace_element, "static");
+                        }
+                        else if (node.kind === 146 /* Parameter */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "static");
+                        }
+                        else if (flags & 128 /* Abstract */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, "static", "abstract");
+                        }
+                        flags |= 32 /* Static */;
+                        lastStatic = modifier;
+                        break;
+                    case 131 /* ReadonlyKeyword */:
+                        if (flags & 64 /* Readonly */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "readonly");
+                        }
+                        else if (node.kind !== 149 /* PropertyDeclaration */ && node.kind !== 148 /* PropertySignature */ && node.kind !== 157 /* IndexSignature */ && node.kind !== 146 /* Parameter */) {
+                            // If node.kind === SyntaxKind.Parameter, checkParameter report an error if it's not a parameter property.
+                            return grammarErrorOnNode(modifier, ts.Diagnostics.readonly_modifier_can_only_appear_on_a_property_declaration_or_index_signature);
+                        }
+                        flags |= 64 /* Readonly */;
+                        lastReadonly = modifier;
+                        break;
+                    case 84 /* ExportKeyword */:
+                        if (flags & 1 /* Export */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "export");
+                        }
+                        else if (flags & 2 /* Ambient */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "export", "declare");
+                        }
+                        else if (flags & 128 /* Abstract */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "export", "abstract");
+                        }
+                        else if (flags & 256 /* Async */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "export", "async");
+                        }
+                        else if (node.parent.kind === 229 /* ClassDeclaration */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_class_element, "export");
+                        }
+                        else if (node.kind === 146 /* Parameter */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "export");
+                        }
+                        flags |= 1 /* Export */;
+                        break;
+                    case 124 /* DeclareKeyword */:
+                        if (flags & 2 /* Ambient */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "declare");
+                        }
+                        else if (flags & 256 /* Async */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_in_an_ambient_context, "async");
+                        }
+                        else if (node.parent.kind === 229 /* ClassDeclaration */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_class_element, "declare");
+                        }
+                        else if (node.kind === 146 /* Parameter */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "declare");
+                        }
+                        else if (ts.isInAmbientContext(node.parent) && node.parent.kind === 234 /* ModuleBlock */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics.A_declare_modifier_cannot_be_used_in_an_already_ambient_context);
+                        }
+                        flags |= 2 /* Ambient */;
+                        lastDeclare = modifier;
+                        break;
+                    case 117 /* AbstractKeyword */:
+                        if (flags & 128 /* Abstract */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "abstract");
+                        }
+                        if (node.kind !== 229 /* ClassDeclaration */) {
+                            if (node.kind !== 151 /* MethodDeclaration */ &&
+                                node.kind !== 149 /* PropertyDeclaration */ &&
+                                node.kind !== 153 /* GetAccessor */ &&
+                                node.kind !== 154 /* SetAccessor */) {
+                                return grammarErrorOnNode(modifier, ts.Diagnostics.abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration);
+                            }
+                            if (!(node.parent.kind === 229 /* ClassDeclaration */ && ts.getModifierFlags(node.parent) & 128 /* Abstract */)) {
+                                return grammarErrorOnNode(modifier, ts.Diagnostics.Abstract_methods_can_only_appear_within_an_abstract_class);
+                            }
+                            if (flags & 32 /* Static */) {
+                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, "static", "abstract");
+                            }
+                            if (flags & 8 /* Private */) {
+                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, "private", "abstract");
+                            }
+                        }
+                        flags |= 128 /* Abstract */;
+                        break;
+                    case 120 /* AsyncKeyword */:
+                        if (flags & 256 /* Async */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "async");
+                        }
+                        else if (flags & 2 /* Ambient */ || ts.isInAmbientContext(node.parent)) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_in_an_ambient_context, "async");
+                        }
+                        else if (node.kind === 146 /* Parameter */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "async");
+                        }
+                        flags |= 256 /* Async */;
+                        lastAsync = modifier;
+                        break;
                 }
-                checkForInOrForOfVariableDeclaration(node);
             }
-            else {
-                // In a 'for-in' statement of the form
-                // for (Var in Expr) Statement
-                //   Var must be an expression classified as a reference of type Any or the String primitive type,
-                //   and Expr must be an expression of type Any, an object type, or a type parameter type.
-                var varExpr = node.initializer;
-                var leftType = checkExpression(varExpr);
-                if (varExpr.kind === 170 /* ArrayLiteralExpression */ || varExpr.kind === 171 /* ObjectLiteralExpression */) {
-                    error(varExpr, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern);
+            if (node.kind === 152 /* Constructor */) {
+                if (flags & 32 /* Static */) {
+                    return grammarErrorOnNode(lastStatic, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "static");
                 }
-                else if (!isTypeAnyOrAllConstituentTypesHaveKind(leftType, 34 /* StringLike */)) {
-                    error(varExpr, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any);
+                if (flags & 128 /* Abstract */) {
+                    return grammarErrorOnNode(lastStatic, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "abstract");
                 }
-                else {
-                    // run check only former check succeeded to avoid cascading errors
-                    checkReferenceExpression(varExpr, ts.Diagnostics.Invalid_left_hand_side_in_for_in_statement, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_be_a_constant_or_a_read_only_property);
+                else if (flags & 256 /* Async */) {
+                    return grammarErrorOnNode(lastAsync, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "async");
                 }
+                else if (flags & 64 /* Readonly */) {
+                    return grammarErrorOnNode(lastReadonly, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "readonly");
+                }
+                return;
             }
-            var rightType = checkNonNullExpression(node.expression);
-            // unknownType is returned i.e. if node.expression is identifier whose name cannot be resolved
-            // in this case error about missing name is already reported - do not report extra one
-            if (!isTypeAnyOrAllConstituentTypesHaveKind(rightType, 2588672 /* ObjectType */ | 16384 /* TypeParameter */)) {
-                error(node.expression, ts.Diagnostics.The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter);
-            }
-            checkSourceElement(node.statement);
-            if (node.locals) {
-                registerForUnusedIdentifiersCheck(node);
-            }
-        }
-        function checkForInOrForOfVariableDeclaration(iterationStatement) {
-            var variableDeclarationList = iterationStatement.initializer;
-            // checkGrammarForInOrForOfStatement will check that there is exactly one declaration.
-            if (variableDeclarationList.declarations.length >= 1) {
-                var decl = variableDeclarationList.declarations[0];
-                checkVariableDeclaration(decl);
-            }
-        }
-        function checkRightHandSideOfForOf(rhsExpression) {
-            var expressionType = checkNonNullExpression(rhsExpression);
-            return checkIteratedTypeOrElementType(expressionType, rhsExpression, /*allowStringInput*/ true);
-        }
-        function checkIteratedTypeOrElementType(inputType, errorNode, allowStringInput) {
-            if (isTypeAny(inputType)) {
-                return inputType;
-            }
-            if (languageVersion >= 2 /* ES6 */) {
-                return checkElementTypeOfIterable(inputType, errorNode);
+            else if ((node.kind === 238 /* ImportDeclaration */ || node.kind === 237 /* ImportEqualsDeclaration */) && flags & 2 /* Ambient */) {
+                return grammarErrorOnNode(lastDeclare, ts.Diagnostics.A_0_modifier_cannot_be_used_with_an_import_declaration, "declare");
             }
-            if (allowStringInput) {
-                return checkElementTypeOfArrayOrString(inputType, errorNode);
+            else if (node.kind === 146 /* Parameter */ && (flags & 92 /* ParameterPropertyModifier */) && ts.isBindingPattern(node.name)) {
+                return grammarErrorOnNode(node, ts.Diagnostics.A_parameter_property_may_not_be_declared_using_a_binding_pattern);
             }
-            if (isArrayLikeType(inputType)) {
-                var indexType = getIndexTypeOfType(inputType, 1 /* Number */);
-                if (indexType) {
-                    return indexType;
-                }
+            else if (node.kind === 146 /* Parameter */ && (flags & 92 /* ParameterPropertyModifier */) && node.dotDotDotToken) {
+                return grammarErrorOnNode(node, ts.Diagnostics.A_parameter_property_cannot_be_declared_using_a_rest_parameter);
             }
-            if (errorNode) {
-                error(errorNode, ts.Diagnostics.Type_0_is_not_an_array_type, typeToString(inputType));
+            if (flags & 256 /* Async */) {
+                return checkGrammarAsyncModifier(node, lastAsync);
             }
-            return unknownType;
         }
         /**
-         * When errorNode is undefined, it means we should not report any errors.
+         * true | false: Early return this value from checkGrammarModifiers.
+         * undefined: Need to do full checking on the modifiers.
          */
-        function checkElementTypeOfIterable(iterable, errorNode) {
-            var elementType = getElementTypeOfIterable(iterable, errorNode);
-            // Now even though we have extracted the iteratedType, we will have to validate that the type
-            // passed in is actually an Iterable.
-            if (errorNode && elementType) {
-                checkTypeAssignableTo(iterable, createIterableType(elementType), errorNode);
-            }
-            return elementType || anyType;
+        function reportObviousModifierErrors(node) {
+            return !node.modifiers
+                ? false
+                : shouldReportBadModifier(node)
+                    ? grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here)
+                    : undefined;
         }
-        /**
-         * We want to treat type as an iterable, and get the type it is an iterable of. The iterable
-         * must have the following structure (annotated with the names of the variables below):
-         *
-         * { // iterable
-         *     [Symbol.iterator]: { // iteratorFunction
-         *         (): Iterator<T>
-         *     }
-         * }
-         *
-         * T is the type we are after. At every level that involves analyzing return types
-         * of signatures, we union the return types of all the signatures.
-         *
-         * Another thing to note is that at any step of this process, we could run into a dead end,
-         * meaning either the property is missing, or we run into the anyType. If either of these things
-         * happens, we return undefined to signal that we could not find the iterated type. If a property
-         * is missing, and the previous step did not result in 'any', then we also give an error if the
-         * caller requested it. Then the caller can decide what to do in the case where there is no iterated
-         * type. This is different from returning anyType, because that would signify that we have matched the
-         * whole pattern and that T (above) is 'any'.
-         */
-        function getElementTypeOfIterable(type, errorNode) {
-            if (isTypeAny(type)) {
-                return undefined;
-            }
-            var typeAsIterable = type;
-            if (!typeAsIterable.iterableElementType) {
-                // As an optimization, if the type is instantiated directly using the globalIterableType (Iterable<number>),
-                // then just grab its type argument.
-                if ((type.flags & 131072 /* Reference */) && type.target === getGlobalIterableType()) {
-                    typeAsIterable.iterableElementType = type.typeArguments[0];
-                }
-                else {
-                    var iteratorFunction = getTypeOfPropertyOfType(type, ts.getPropertyNameForKnownSymbolName("iterator"));
-                    if (isTypeAny(iteratorFunction)) {
-                        return undefined;
+        function shouldReportBadModifier(node) {
+            switch (node.kind) {
+                case 153 /* GetAccessor */:
+                case 154 /* SetAccessor */:
+                case 152 /* Constructor */:
+                case 149 /* PropertyDeclaration */:
+                case 148 /* PropertySignature */:
+                case 151 /* MethodDeclaration */:
+                case 150 /* MethodSignature */:
+                case 157 /* IndexSignature */:
+                case 233 /* ModuleDeclaration */:
+                case 238 /* ImportDeclaration */:
+                case 237 /* ImportEqualsDeclaration */:
+                case 244 /* ExportDeclaration */:
+                case 243 /* ExportAssignment */:
+                case 186 /* FunctionExpression */:
+                case 187 /* ArrowFunction */:
+                case 146 /* Parameter */:
+                    return false;
+                default:
+                    if (node.parent.kind === 234 /* ModuleBlock */ || node.parent.kind === 265 /* SourceFile */) {
+                        return false;
                     }
-                    var iteratorFunctionSignatures = iteratorFunction ? getSignaturesOfType(iteratorFunction, 0 /* Call */) : emptyArray;
-                    if (iteratorFunctionSignatures.length === 0) {
-                        if (errorNode) {
-                            error(errorNode, ts.Diagnostics.Type_must_have_a_Symbol_iterator_method_that_returns_an_iterator);
-                        }
-                        return undefined;
+                    switch (node.kind) {
+                        case 228 /* FunctionDeclaration */:
+                            return nodeHasAnyModifiersExcept(node, 120 /* AsyncKeyword */);
+                        case 229 /* ClassDeclaration */:
+                            return nodeHasAnyModifiersExcept(node, 117 /* AbstractKeyword */);
+                        case 230 /* InterfaceDeclaration */:
+                        case 208 /* VariableStatement */:
+                        case 231 /* TypeAliasDeclaration */:
+                            return true;
+                        case 232 /* EnumDeclaration */:
+                            return nodeHasAnyModifiersExcept(node, 76 /* ConstKeyword */);
+                        default:
+                            ts.Debug.fail();
+                            return false;
                     }
-                    typeAsIterable.iterableElementType = getElementTypeOfIterator(getUnionType(ts.map(iteratorFunctionSignatures, getReturnTypeOfSignature), /*subtypeReduction*/ true), errorNode);
-                }
             }
-            return typeAsIterable.iterableElementType;
         }
-        /**
-         * This function has very similar logic as getElementTypeOfIterable, except that it operates on
-         * Iterators instead of Iterables. Here is the structure:
-         *
-         *  { // iterator
-         *      next: { // iteratorNextFunction
-         *          (): { // iteratorNextResult
-         *              value: T // iteratorNextValue
-         *          }
-         *      }
-         *  }
-         *
-         */
-        function getElementTypeOfIterator(type, errorNode) {
-            if (isTypeAny(type)) {
-                return undefined;
+        function nodeHasAnyModifiersExcept(node, allowedModifier) {
+            return node.modifiers.length > 1 || node.modifiers[0].kind !== allowedModifier;
+        }
+        function checkGrammarAsyncModifier(node, asyncModifier) {
+            switch (node.kind) {
+                case 151 /* MethodDeclaration */:
+                case 228 /* FunctionDeclaration */:
+                case 186 /* FunctionExpression */:
+                case 187 /* ArrowFunction */:
+                    return false;
             }
-            var typeAsIterator = type;
-            if (!typeAsIterator.iteratorElementType) {
-                // As an optimization, if the type is instantiated directly using the globalIteratorType (Iterator<number>),
-                // then just grab its type argument.
-                if ((type.flags & 131072 /* Reference */) && type.target === getGlobalIteratorType()) {
-                    typeAsIterator.iteratorElementType = type.typeArguments[0];
-                }
-                else {
-                    var iteratorNextFunction = getTypeOfPropertyOfType(type, "next");
-                    if (isTypeAny(iteratorNextFunction)) {
-                        return undefined;
+            return grammarErrorOnNode(asyncModifier, ts.Diagnostics._0_modifier_cannot_be_used_here, "async");
+        }
+        function checkGrammarForDisallowedTrailingComma(list) {
+            if (list && list.hasTrailingComma) {
+                var start = list.end - ",".length;
+                var end = list.end;
+                var sourceFile = ts.getSourceFileOfNode(list[0]);
+                return grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.Trailing_comma_not_allowed);
+            }
+        }
+        function checkGrammarTypeParameterList(typeParameters, file) {
+            if (checkGrammarForDisallowedTrailingComma(typeParameters)) {
+                return true;
+            }
+            if (typeParameters && typeParameters.length === 0) {
+                var start = typeParameters.pos - "<".length;
+                var end = ts.skipTrivia(file.text, typeParameters.end) + ">".length;
+                return grammarErrorAtPos(file, start, end - start, ts.Diagnostics.Type_parameter_list_cannot_be_empty);
+            }
+        }
+        function checkGrammarParameterList(parameters) {
+            var seenOptionalParameter = false;
+            var parameterCount = parameters.length;
+            for (var i = 0; i < parameterCount; i++) {
+                var parameter = parameters[i];
+                if (parameter.dotDotDotToken) {
+                    if (i !== (parameterCount - 1)) {
+                        return grammarErrorOnNode(parameter.dotDotDotToken, ts.Diagnostics.A_rest_parameter_must_be_last_in_a_parameter_list);
                     }
-                    var iteratorNextFunctionSignatures = iteratorNextFunction ? getSignaturesOfType(iteratorNextFunction, 0 /* Call */) : emptyArray;
-                    if (iteratorNextFunctionSignatures.length === 0) {
-                        if (errorNode) {
-                            error(errorNode, ts.Diagnostics.An_iterator_must_have_a_next_method);
-                        }
-                        return undefined;
+                    if (ts.isBindingPattern(parameter.name)) {
+                        return grammarErrorOnNode(parameter.name, ts.Diagnostics.A_rest_element_cannot_contain_a_binding_pattern);
                     }
-                    var iteratorNextResult = getUnionType(ts.map(iteratorNextFunctionSignatures, getReturnTypeOfSignature), /*subtypeReduction*/ true);
-                    if (isTypeAny(iteratorNextResult)) {
-                        return undefined;
+                    if (parameter.questionToken) {
+                        return grammarErrorOnNode(parameter.questionToken, ts.Diagnostics.A_rest_parameter_cannot_be_optional);
                     }
-                    var iteratorNextValue = getTypeOfPropertyOfType(iteratorNextResult, "value");
-                    if (!iteratorNextValue) {
-                        if (errorNode) {
-                            error(errorNode, ts.Diagnostics.The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property);
-                        }
-                        return undefined;
+                    if (parameter.initializer) {
+                        return grammarErrorOnNode(parameter.name, ts.Diagnostics.A_rest_parameter_cannot_have_an_initializer);
                     }
-                    typeAsIterator.iteratorElementType = iteratorNextValue;
+                }
+                else if (parameter.questionToken) {
+                    seenOptionalParameter = true;
+                    if (parameter.initializer) {
+                        return grammarErrorOnNode(parameter.name, ts.Diagnostics.Parameter_cannot_have_question_mark_and_initializer);
+                    }
+                }
+                else if (seenOptionalParameter && !parameter.initializer) {
+                    return grammarErrorOnNode(parameter.name, ts.Diagnostics.A_required_parameter_cannot_follow_an_optional_parameter);
                 }
             }
-            return typeAsIterator.iteratorElementType;
         }
-        function getElementTypeOfIterableIterator(type) {
-            if (isTypeAny(type)) {
-                return undefined;
-            }
-            // As an optimization, if the type is instantiated directly using the globalIterableIteratorType (IterableIterator<number>),
-            // then just grab its type argument.
-            if ((type.flags & 131072 /* Reference */) && type.target === getGlobalIterableIteratorType()) {
-                return type.typeArguments[0];
-            }
-            return getElementTypeOfIterable(type, /*errorNode*/ undefined) ||
-                getElementTypeOfIterator(type, /*errorNode*/ undefined);
+        function checkGrammarFunctionLikeDeclaration(node) {
+            // Prevent cascading error by short-circuit
+            var file = ts.getSourceFileOfNode(node);
+            return checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarTypeParameterList(node.typeParameters, file) ||
+                checkGrammarParameterList(node.parameters) || checkGrammarArrowFunction(node, file);
         }
-        /**
-         * This function does the following steps:
-         *   1. Break up arrayOrStringType (possibly a union) into its string constituents and array constituents.
-         *   2. Take the element types of the array constituents.
-         *   3. Return the union of the element types, and string if there was a string constituent.
-         *
-         * For example:
-         *     string -> string
-         *     number[] -> number
-         *     string[] | number[] -> string | number
-         *     string | number[] -> string | number
-         *     string | string[] | number[] -> string | number
-         *
-         * It also errors if:
-         *   1. Some constituent is neither a string nor an array.
-         *   2. Some constituent is a string and target is less than ES5 (because in ES3 string is not indexable).
-         */
-        function checkElementTypeOfArrayOrString(arrayOrStringType, errorNode) {
-            ts.Debug.assert(languageVersion < 2 /* ES6 */);
-            // After we remove all types that are StringLike, we will know if there was a string constituent
-            // based on whether the remaining type is the same as the initial type.
-            var arrayType = arrayOrStringType;
-            if (arrayOrStringType.flags & 524288 /* Union */) {
-                arrayType = getUnionType(ts.filter(arrayOrStringType.types, function (t) { return !(t.flags & 34 /* StringLike */); }), /*subtypeReduction*/ true);
-            }
-            else if (arrayOrStringType.flags & 34 /* StringLike */) {
-                arrayType = neverType;
-            }
-            var hasStringConstituent = arrayOrStringType !== arrayType;
-            var reportedError = false;
-            if (hasStringConstituent) {
-                if (languageVersion < 1 /* ES5 */) {
-                    error(errorNode, ts.Diagnostics.Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher);
-                    reportedError = true;
-                }
-                // Now that we've removed all the StringLike types, if no constituents remain, then the entire
-                // arrayOrStringType was a string.
-                if (arrayType.flags & 8192 /* Never */) {
-                    return stringType;
+        function checkGrammarClassLikeDeclaration(node) {
+            var file = ts.getSourceFileOfNode(node);
+            return checkGrammarClassDeclarationHeritageClauses(node) || checkGrammarTypeParameterList(node.typeParameters, file);
+        }
+        function checkGrammarArrowFunction(node, file) {
+            if (node.kind === 187 /* ArrowFunction */) {
+                var arrowFunction = node;
+                var startLine = ts.getLineAndCharacterOfPosition(file, arrowFunction.equalsGreaterThanToken.pos).line;
+                var endLine = ts.getLineAndCharacterOfPosition(file, arrowFunction.equalsGreaterThanToken.end).line;
+                if (startLine !== endLine) {
+                    return grammarErrorOnNode(arrowFunction.equalsGreaterThanToken, ts.Diagnostics.Line_terminator_not_permitted_before_arrow);
                 }
             }
-            if (!isArrayLikeType(arrayType)) {
-                if (!reportedError) {
-                    // Which error we report depends on whether there was a string constituent. For example,
-                    // if the input type is number | string, we want to say that number is not an array type.
-                    // But if the input was just number, we want to say that number is not an array type
-                    // or a string type.
-                    var diagnostic = hasStringConstituent
-                        ? ts.Diagnostics.Type_0_is_not_an_array_type
-                        : ts.Diagnostics.Type_0_is_not_an_array_type_or_a_string_type;
-                    error(errorNode, diagnostic, typeToString(arrayType));
+            return false;
+        }
+        function checkGrammarIndexSignatureParameters(node) {
+            var parameter = node.parameters[0];
+            if (node.parameters.length !== 1) {
+                if (parameter) {
+                    return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_must_have_exactly_one_parameter);
                 }
-                return hasStringConstituent ? stringType : unknownType;
-            }
-            var arrayElementType = getIndexTypeOfType(arrayType, 1 /* Number */) || unknownType;
-            if (hasStringConstituent) {
-                // This is just an optimization for the case where arrayOrStringType is string | string[]
-                if (arrayElementType.flags & 34 /* StringLike */) {
-                    return stringType;
+                else {
+                    return grammarErrorOnNode(node, ts.Diagnostics.An_index_signature_must_have_exactly_one_parameter);
                 }
-                return getUnionType([arrayElementType, stringType], /*subtypeReduction*/ true);
             }
-            return arrayElementType;
-        }
-        function checkBreakOrContinueStatement(node) {
-            // Grammar checking
-            checkGrammarStatementInAmbientContext(node) || checkGrammarBreakOrContinueStatement(node);
-            // TODO: Check that target label is valid
-        }
-        function isGetAccessorWithAnnotatedSetAccessor(node) {
-            return !!(node.kind === 149 /* GetAccessor */ && ts.getSetAccessorTypeAnnotationNode(ts.getDeclarationOfKind(node.symbol, 150 /* SetAccessor */)));
+            if (parameter.dotDotDotToken) {
+                return grammarErrorOnNode(parameter.dotDotDotToken, ts.Diagnostics.An_index_signature_cannot_have_a_rest_parameter);
+            }
+            if (ts.getModifierFlags(parameter) !== 0) {
+                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_cannot_have_an_accessibility_modifier);
+            }
+            if (parameter.questionToken) {
+                return grammarErrorOnNode(parameter.questionToken, ts.Diagnostics.An_index_signature_parameter_cannot_have_a_question_mark);
+            }
+            if (parameter.initializer) {
+                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_cannot_have_an_initializer);
+            }
+            if (!parameter.type) {
+                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_must_have_a_type_annotation);
+            }
+            if (parameter.type.kind !== 136 /* StringKeyword */ && parameter.type.kind !== 133 /* NumberKeyword */) {
+                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_type_must_be_string_or_number);
+            }
+            if (!node.type) {
+                return grammarErrorOnNode(node, ts.Diagnostics.An_index_signature_must_have_a_type_annotation);
+            }
         }
-        function isUnwrappedReturnTypeVoidOrAny(func, returnType) {
-            var unwrappedReturnType = ts.isAsyncFunctionLike(func) ? getPromisedType(returnType) : returnType;
-            return unwrappedReturnType && maybeTypeOfKind(unwrappedReturnType, 1024 /* Void */ | 1 /* Any */);
+        function checkGrammarIndexSignature(node) {
+            // Prevent cascading error by short-circuit
+            return checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarIndexSignatureParameters(node);
         }
-        function checkReturnStatement(node) {
-            // Grammar checking
-            if (!checkGrammarStatementInAmbientContext(node)) {
-                var functionBlock = ts.getContainingFunction(node);
-                if (!functionBlock) {
-                    grammarErrorOnFirstToken(node, ts.Diagnostics.A_return_statement_can_only_be_used_within_a_function_body);
-                }
+        function checkGrammarForAtLeastOneTypeArgument(node, typeArguments) {
+            if (typeArguments && typeArguments.length === 0) {
+                var sourceFile = ts.getSourceFileOfNode(node);
+                var start = typeArguments.pos - "<".length;
+                var end = ts.skipTrivia(sourceFile.text, typeArguments.end) + ">".length;
+                return grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.Type_argument_list_cannot_be_empty);
             }
-            var func = ts.getContainingFunction(node);
-            if (func) {
-                var signature = getSignatureFromDeclaration(func);
-                var returnType = getReturnTypeOfSignature(signature);
-                if (strictNullChecks || node.expression || returnType.flags & 8192 /* Never */) {
-                    var exprType = node.expression ? checkExpressionCached(node.expression) : undefinedType;
-                    if (func.asteriskToken) {
-                        // A generator does not need its return expressions checked against its return type.
-                        // Instead, the yield expressions are checked against the element type.
-                        // TODO: Check return expressions of generators when return type tracking is added
-                        // for generators.
-                        return;
-                    }
-                    if (func.kind === 150 /* SetAccessor */) {
-                        if (node.expression) {
-                            error(node.expression, ts.Diagnostics.Setters_cannot_return_a_value);
-                        }
-                    }
-                    else if (func.kind === 148 /* Constructor */) {
-                        if (node.expression && !checkTypeAssignableTo(exprType, returnType, node.expression)) {
-                            error(node.expression, ts.Diagnostics.Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class);
-                        }
-                    }
-                    else if (func.type || isGetAccessorWithAnnotatedSetAccessor(func)) {
-                        if (ts.isAsyncFunctionLike(func)) {
-                            var promisedType = getPromisedType(returnType);
-                            var awaitedType = checkAwaitedType(exprType, node.expression || node, ts.Diagnostics.Return_expression_in_async_function_does_not_have_a_valid_callable_then_member);
-                            if (promisedType) {
-                                // If the function has a return type, but promisedType is
-                                // undefined, an error will be reported in checkAsyncFunctionReturnType
-                                // so we don't need to report one here.
-                                checkTypeAssignableTo(awaitedType, promisedType, node.expression || node);
-                            }
-                        }
-                        else {
-                            checkTypeAssignableTo(exprType, returnType, node.expression || node);
-                        }
+        }
+        function checkGrammarTypeArguments(node, typeArguments) {
+            return checkGrammarForDisallowedTrailingComma(typeArguments) ||
+                checkGrammarForAtLeastOneTypeArgument(node, typeArguments);
+        }
+        function checkGrammarForOmittedArgument(node, args) {
+            if (args) {
+                var sourceFile = ts.getSourceFileOfNode(node);
+                for (var _i = 0, args_4 = args; _i < args_4.length; _i++) {
+                    var arg = args_4[_i];
+                    if (arg.kind === 200 /* OmittedExpression */) {
+                        return grammarErrorAtPos(sourceFile, arg.pos, 0, ts.Diagnostics.Argument_expression_expected);
                     }
                 }
-                else if (func.kind !== 148 /* Constructor */ && compilerOptions.noImplicitReturns && !isUnwrappedReturnTypeVoidOrAny(func, returnType)) {
-                    // The function has a return type, but the return statement doesn't have an expression.
-                    error(node, ts.Diagnostics.Not_all_code_paths_return_a_value);
-                }
             }
         }
-        function checkWithStatement(node) {
-            // Grammar checking for withStatement
-            if (!checkGrammarStatementInAmbientContext(node)) {
-                if (node.flags & 262144 /* AwaitContext */) {
-                    grammarErrorOnFirstToken(node, ts.Diagnostics.with_statements_are_not_allowed_in_an_async_function_block);
-                }
+        function checkGrammarArguments(node, args) {
+            return checkGrammarForOmittedArgument(node, args);
+        }
+        function checkGrammarHeritageClause(node) {
+            var types = node.types;
+            if (checkGrammarForDisallowedTrailingComma(types)) {
+                return true;
             }
-            checkExpression(node.expression);
-            var sourceFile = ts.getSourceFileOfNode(node);
-            if (!hasParseDiagnostics(sourceFile)) {
-                var start = ts.getSpanOfTokenAtPosition(sourceFile, node.pos).start;
-                var end = node.statement.pos;
-                grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.The_with_statement_is_not_supported_All_symbols_in_a_with_block_will_have_type_any);
+            if (types && types.length === 0) {
+                var listType = ts.tokenToString(node.token);
+                var sourceFile = ts.getSourceFileOfNode(node);
+                return grammarErrorAtPos(sourceFile, types.pos, 0, ts.Diagnostics._0_list_cannot_be_empty, listType);
             }
+            return ts.forEach(types, checkGrammarExpressionWithTypeArguments);
         }
-        function checkSwitchStatement(node) {
-            // Grammar checking
-            checkGrammarStatementInAmbientContext(node);
-            var firstDefaultClause;
-            var hasDuplicateDefaultClause = false;
-            var expressionType = checkExpression(node.expression);
-            ts.forEach(node.caseBlock.clauses, function (clause) {
-                // Grammar check for duplicate default clauses, skip if we already report duplicate default clause
-                if (clause.kind === 250 /* DefaultClause */ && !hasDuplicateDefaultClause) {
-                    if (firstDefaultClause === undefined) {
-                        firstDefaultClause = clause;
+        function checkGrammarExpressionWithTypeArguments(node) {
+            return checkGrammarTypeArguments(node, node.typeArguments);
+        }
+        function checkGrammarClassDeclarationHeritageClauses(node) {
+            var seenExtendsClause = false;
+            var seenImplementsClause = false;
+            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && node.heritageClauses) {
+                for (var _i = 0, _a = node.heritageClauses; _i < _a.length; _i++) {
+                    var heritageClause = _a[_i];
+                    if (heritageClause.token === 85 /* ExtendsKeyword */) {
+                        if (seenExtendsClause) {
+                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.extends_clause_already_seen);
+                        }
+                        if (seenImplementsClause) {
+                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.extends_clause_must_precede_implements_clause);
+                        }
+                        if (heritageClause.types.length > 1) {
+                            return grammarErrorOnFirstToken(heritageClause.types[1], ts.Diagnostics.Classes_can_only_extend_a_single_class);
+                        }
+                        seenExtendsClause = true;
                     }
                     else {
-                        var sourceFile = ts.getSourceFileOfNode(node);
-                        var start = ts.skipTrivia(sourceFile.text, clause.pos);
-                        var end = clause.statements.length > 0 ? clause.statements[0].pos : clause.end;
-                        grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.A_default_clause_cannot_appear_more_than_once_in_a_switch_statement);
-                        hasDuplicateDefaultClause = true;
-                    }
-                }
-                if (produceDiagnostics && clause.kind === 249 /* CaseClause */) {
-                    var caseClause = clause;
-                    // TypeScript 1.0 spec (April 2014): 5.9
-                    // In a 'switch' statement, each 'case' expression must be of a type that is comparable
-                    // to or from the type of the 'switch' expression.
-                    var caseType = checkExpression(caseClause.expression);
-                    if (!isTypeEqualityComparableTo(expressionType, caseType)) {
-                        // expressionType is not comparable to caseType, try the reversed check and report errors if it fails
-                        checkTypeComparableTo(caseType, expressionType, caseClause.expression, /*headMessage*/ undefined);
+                        ts.Debug.assert(heritageClause.token === 108 /* ImplementsKeyword */);
+                        if (seenImplementsClause) {
+                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.implements_clause_already_seen);
+                        }
+                        seenImplementsClause = true;
                     }
+                    // Grammar checking heritageClause inside class declaration
+                    checkGrammarHeritageClause(heritageClause);
                 }
-                ts.forEach(clause.statements, checkSourceElement);
-            });
-            if (node.caseBlock.locals) {
-                registerForUnusedIdentifiersCheck(node.caseBlock);
             }
         }
-        function checkLabeledStatement(node) {
-            // Grammar checking
-            if (!checkGrammarStatementInAmbientContext(node)) {
-                var current = node.parent;
-                while (current) {
-                    if (ts.isFunctionLike(current)) {
-                        break;
+        function checkGrammarInterfaceDeclaration(node) {
+            var seenExtendsClause = false;
+            if (node.heritageClauses) {
+                for (var _i = 0, _a = node.heritageClauses; _i < _a.length; _i++) {
+                    var heritageClause = _a[_i];
+                    if (heritageClause.token === 85 /* ExtendsKeyword */) {
+                        if (seenExtendsClause) {
+                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.extends_clause_already_seen);
+                        }
+                        seenExtendsClause = true;
                     }
-                    if (current.kind === 214 /* LabeledStatement */ && current.label.text === node.label.text) {
-                        var sourceFile = ts.getSourceFileOfNode(node);
-                        grammarErrorOnNode(node.label, ts.Diagnostics.Duplicate_label_0, ts.getTextOfNodeFromSourceText(sourceFile.text, node.label));
-                        break;
+                    else {
+                        ts.Debug.assert(heritageClause.token === 108 /* ImplementsKeyword */);
+                        return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.Interface_declaration_cannot_have_implements_clause);
                     }
-                    current = current.parent;
+                    // Grammar checking heritageClause inside class declaration
+                    checkGrammarHeritageClause(heritageClause);
                 }
             }
-            // ensure that label is unique
-            checkSourceElement(node.statement);
+            return false;
         }
-        function checkThrowStatement(node) {
-            // Grammar checking
-            if (!checkGrammarStatementInAmbientContext(node)) {
-                if (node.expression === undefined) {
-                    grammarErrorAfterFirstToken(node, ts.Diagnostics.Line_break_not_permitted_here);
-                }
+        function checkGrammarComputedPropertyName(node) {
+            // If node is not a computedPropertyName, just skip the grammar checking
+            if (node.kind !== 144 /* ComputedPropertyName */) {
+                return false;
             }
-            if (node.expression) {
-                checkExpression(node.expression);
+            var computedPropertyName = node;
+            if (computedPropertyName.expression.kind === 194 /* BinaryExpression */ && computedPropertyName.expression.operatorToken.kind === 26 /* CommaToken */) {
+                return grammarErrorOnNode(computedPropertyName.expression, ts.Diagnostics.A_comma_expression_is_not_allowed_in_a_computed_property_name);
             }
         }
-        function checkTryStatement(node) {
-            // Grammar checking
-            checkGrammarStatementInAmbientContext(node);
-            checkBlock(node.tryBlock);
-            var catchClause = node.catchClause;
-            if (catchClause) {
-                // Grammar checking
-                if (catchClause.variableDeclaration) {
-                    if (catchClause.variableDeclaration.name.kind !== 69 /* Identifier */) {
-                        grammarErrorOnFirstToken(catchClause.variableDeclaration.name, ts.Diagnostics.Catch_clause_variable_name_must_be_an_identifier);
-                    }
-                    else if (catchClause.variableDeclaration.type) {
-                        grammarErrorOnFirstToken(catchClause.variableDeclaration.type, ts.Diagnostics.Catch_clause_variable_cannot_have_a_type_annotation);
-                    }
-                    else if (catchClause.variableDeclaration.initializer) {
-                        grammarErrorOnFirstToken(catchClause.variableDeclaration.initializer, ts.Diagnostics.Catch_clause_variable_cannot_have_an_initializer);
-                    }
-                    else {
-                        var identifierName = catchClause.variableDeclaration.name.text;
-                        var locals = catchClause.block.locals;
-                        if (locals) {
-                            var localSymbol = locals[identifierName];
-                            if (localSymbol && (localSymbol.flags & 2 /* BlockScopedVariable */) !== 0) {
-                                grammarErrorOnNode(localSymbol.valueDeclaration, ts.Diagnostics.Cannot_redeclare_identifier_0_in_catch_clause, identifierName);
-                            }
-                        }
-                    }
+        function checkGrammarForGenerator(node) {
+            if (node.asteriskToken) {
+                ts.Debug.assert(node.kind === 228 /* FunctionDeclaration */ ||
+                    node.kind === 186 /* FunctionExpression */ ||
+                    node.kind === 151 /* MethodDeclaration */);
+                if (ts.isInAmbientContext(node)) {
+                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.Generators_are_not_allowed_in_an_ambient_context);
+                }
+                if (!node.body) {
+                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.An_overload_signature_cannot_be_declared_as_a_generator);
                 }
-                checkBlock(catchClause.block);
             }
-            if (node.finallyBlock) {
-                checkBlock(node.finallyBlock);
+        }
+        function checkGrammarForInvalidQuestionMark(questionToken, message) {
+            if (questionToken) {
+                return grammarErrorOnNode(questionToken, message);
             }
         }
-        function checkIndexConstraints(type) {
-            var declaredNumberIndexer = getIndexDeclarationOfSymbol(type.symbol, 1 /* Number */);
-            var declaredStringIndexer = getIndexDeclarationOfSymbol(type.symbol, 0 /* String */);
-            var stringIndexType = getIndexTypeOfType(type, 0 /* String */);
-            var numberIndexType = getIndexTypeOfType(type, 1 /* Number */);
-            if (stringIndexType || numberIndexType) {
-                ts.forEach(getPropertiesOfObjectType(type), function (prop) {
-                    var propType = getTypeOfSymbol(prop);
-                    checkIndexConstraintForProperty(prop, propType, type, declaredStringIndexer, stringIndexType, 0 /* String */);
-                    checkIndexConstraintForProperty(prop, propType, type, declaredNumberIndexer, numberIndexType, 1 /* Number */);
-                });
-                if (type.flags & 32768 /* Class */ && ts.isClassLike(type.symbol.valueDeclaration)) {
-                    var classDeclaration = type.symbol.valueDeclaration;
-                    for (var _i = 0, _a = classDeclaration.members; _i < _a.length; _i++) {
-                        var member = _a[_i];
-                        // Only process instance properties with computed names here.
-                        // Static properties cannot be in conflict with indexers,
-                        // and properties with literal names were already checked.
-                        if (!(ts.getModifierFlags(member) & 32 /* Static */) && ts.hasDynamicName(member)) {
-                            var propType = getTypeOfSymbol(member.symbol);
-                            checkIndexConstraintForProperty(member.symbol, propType, type, declaredStringIndexer, stringIndexType, 0 /* String */);
-                            checkIndexConstraintForProperty(member.symbol, propType, type, declaredNumberIndexer, numberIndexType, 1 /* Number */);
+        function checkGrammarObjectLiteralExpression(node, inDestructuring) {
+            var seen = ts.createMap();
+            var Property = 1;
+            var GetAccessor = 2;
+            var SetAccessor = 4;
+            var GetOrSetAccessor = GetAccessor | SetAccessor;
+            for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
+                var prop = _a[_i];
+                if (prop.kind === 263 /* SpreadAssignment */) {
+                    continue;
+                }
+                var name_35 = prop.name;
+                if (name_35.kind === 144 /* ComputedPropertyName */) {
+                    // If the name is not a ComputedPropertyName, the grammar checking will skip it
+                    checkGrammarComputedPropertyName(name_35);
+                }
+                if (prop.kind === 262 /* ShorthandPropertyAssignment */ && !inDestructuring && prop.objectAssignmentInitializer) {
+                    // having objectAssignmentInitializer is only valid in ObjectAssignmentPattern
+                    // outside of destructuring it is a syntax error
+                    return grammarErrorOnNode(prop.equalsToken, ts.Diagnostics.can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment);
+                }
+                // Modifiers are never allowed on properties except for 'async' on a method declaration
+                if (prop.modifiers) {
+                    for (var _b = 0, _c = prop.modifiers; _b < _c.length; _b++) {
+                        var mod = _c[_b];
+                        if (mod.kind !== 120 /* AsyncKeyword */ || prop.kind !== 151 /* MethodDeclaration */) {
+                            grammarErrorOnNode(mod, ts.Diagnostics._0_modifier_cannot_be_used_here, ts.getTextOfNode(mod));
                         }
                     }
                 }
-            }
-            var errorNode;
-            if (stringIndexType && numberIndexType) {
-                errorNode = declaredNumberIndexer || declaredStringIndexer;
-                // condition 'errorNode === undefined' may appear if types does not declare nor string neither number indexer
-                if (!errorNode && (type.flags & 65536 /* Interface */)) {
-                    var someBaseTypeHasBothIndexers = ts.forEach(getBaseTypes(type), function (base) { return getIndexTypeOfType(base, 0 /* String */) && getIndexTypeOfType(base, 1 /* Number */); });
-                    errorNode = someBaseTypeHasBothIndexers ? undefined : type.symbol.declarations[0];
+                // ECMA-262 11.1.5 Object Initializer
+                // If previous is not undefined then throw a SyntaxError exception if any of the following conditions are true
+                // a.This production is contained in strict code and IsDataDescriptor(previous) is true and
+                // IsDataDescriptor(propId.descriptor) is true.
+                //    b.IsDataDescriptor(previous) is true and IsAccessorDescriptor(propId.descriptor) is true.
+                //    c.IsAccessorDescriptor(previous) is true and IsDataDescriptor(propId.descriptor) is true.
+                //    d.IsAccessorDescriptor(previous) is true and IsAccessorDescriptor(propId.descriptor) is true
+                // and either both previous and propId.descriptor have[[Get]] fields or both previous and propId.descriptor have[[Set]] fields
+                var currentKind = void 0;
+                if (prop.kind === 261 /* PropertyAssignment */ || prop.kind === 262 /* ShorthandPropertyAssignment */) {
+                    // Grammar checking for computedPropertyName and shorthandPropertyAssignment
+                    checkGrammarForInvalidQuestionMark(prop.questionToken, ts.Diagnostics.An_object_member_cannot_be_declared_optional);
+                    if (name_35.kind === 8 /* NumericLiteral */) {
+                        checkGrammarNumericLiteral(name_35);
+                    }
+                    currentKind = Property;
                 }
-            }
-            if (errorNode && !isTypeAssignableTo(numberIndexType, stringIndexType)) {
-                error(errorNode, ts.Diagnostics.Numeric_index_type_0_is_not_assignable_to_string_index_type_1, typeToString(numberIndexType), typeToString(stringIndexType));
-            }
-            function checkIndexConstraintForProperty(prop, propertyType, containingType, indexDeclaration, indexType, indexKind) {
-                if (!indexType) {
-                    return;
+                else if (prop.kind === 151 /* MethodDeclaration */) {
+                    currentKind = Property;
                 }
-                // index is numeric and property name is not valid numeric literal
-                if (indexKind === 1 /* Number */ && !isNumericName(prop.valueDeclaration.name)) {
-                    return;
+                else if (prop.kind === 153 /* GetAccessor */) {
+                    currentKind = GetAccessor;
                 }
-                // perform property check if property or indexer is declared in 'type'
-                // this allows to rule out cases when both property and indexer are inherited from the base class
-                var errorNode;
-                if (prop.valueDeclaration.name.kind === 140 /* ComputedPropertyName */ || prop.parent === containingType.symbol) {
-                    errorNode = prop.valueDeclaration;
+                else if (prop.kind === 154 /* SetAccessor */) {
+                    currentKind = SetAccessor;
                 }
-                else if (indexDeclaration) {
-                    errorNode = indexDeclaration;
+                else {
+                    ts.Debug.fail("Unexpected syntax kind:" + prop.kind);
                 }
-                else if (containingType.flags & 65536 /* Interface */) {
-                    // for interfaces property and indexer might be inherited from different bases
-                    // check if any base class already has both property and indexer.
-                    // check should be performed only if 'type' is the first type that brings property\indexer together
-                    var someBaseClassHasBothPropertyAndIndexer = ts.forEach(getBaseTypes(containingType), function (base) { return getPropertyOfObjectType(base, prop.name) && getIndexTypeOfType(base, indexKind); });
-                    errorNode = someBaseClassHasBothPropertyAndIndexer ? undefined : containingType.symbol.declarations[0];
+                var effectiveName = ts.getPropertyNameForPropertyNameNode(name_35);
+                if (effectiveName === undefined) {
+                    continue;
                 }
-                if (errorNode && !isTypeAssignableTo(propertyType, indexType)) {
-                    var errorMessage = indexKind === 0 /* String */
-                        ? ts.Diagnostics.Property_0_of_type_1_is_not_assignable_to_string_index_type_2
-                        : ts.Diagnostics.Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2;
-                    error(errorNode, errorMessage, symbolToString(prop), typeToString(propertyType), typeToString(indexType));
+                var existingKind = seen.get(effectiveName);
+                if (!existingKind) {
+                    seen.set(effectiveName, currentKind);
                 }
-            }
-        }
-        function checkTypeNameIsReserved(name, message) {
-            // TS 1.0 spec (April 2014): 3.6.1
-            // The predefined type keywords are reserved and cannot be used as names of user defined types.
-            switch (name.text) {
-                case "any":
-                case "number":
-                case "boolean":
-                case "string":
-                case "symbol":
-                case "void":
-                    error(name, message, name.text);
-            }
-        }
-        /** Check each type parameter and check that type parameters have no duplicate type parameter declarations */
-        function checkTypeParameters(typeParameterDeclarations) {
-            if (typeParameterDeclarations) {
-                for (var i = 0, n = typeParameterDeclarations.length; i < n; i++) {
-                    var node = typeParameterDeclarations[i];
-                    checkTypeParameter(node);
-                    if (produceDiagnostics) {
-                        for (var j = 0; j < i; j++) {
-                            if (typeParameterDeclarations[j].symbol === node.symbol) {
-                                error(node.name, ts.Diagnostics.Duplicate_identifier_0, ts.declarationNameToString(node.name));
-                            }
+                else {
+                    if (currentKind === Property && existingKind === Property) {
+                        grammarErrorOnNode(name_35, ts.Diagnostics.Duplicate_identifier_0, ts.getTextOfNode(name_35));
+                    }
+                    else if ((currentKind & GetOrSetAccessor) && (existingKind & GetOrSetAccessor)) {
+                        if (existingKind !== GetOrSetAccessor && currentKind !== existingKind) {
+                            seen.set(effectiveName, currentKind | existingKind);
                         }
+                        else {
+                            return grammarErrorOnNode(name_35, ts.Diagnostics.An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name);
+                        }
+                    }
+                    else {
+                        return grammarErrorOnNode(name_35, ts.Diagnostics.An_object_literal_cannot_have_property_and_accessor_with_the_same_name);
                     }
                 }
             }
         }
-        /** Check that type parameter lists are identical across multiple declarations */
-        function checkTypeParameterListsIdentical(node, symbol) {
-            if (symbol.declarations.length === 1) {
-                return;
-            }
-            var firstDecl;
-            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                var declaration = _a[_i];
-                if (declaration.kind === 221 /* ClassDeclaration */ || declaration.kind === 222 /* InterfaceDeclaration */) {
-                    if (!firstDecl) {
-                        firstDecl = declaration;
-                    }
-                    else if (!areTypeParametersIdentical(firstDecl.typeParameters, node.typeParameters)) {
-                        error(node.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_type_parameters, node.name.text);
-                    }
+        function checkGrammarJsxElement(node) {
+            var seen = ts.createMap();
+            for (var _i = 0, _a = node.attributes.properties; _i < _a.length; _i++) {
+                var attr = _a[_i];
+                if (attr.kind === 255 /* JsxSpreadAttribute */) {
+                    continue;
+                }
+                var jsxAttr = attr;
+                var name_36 = jsxAttr.name;
+                if (!seen.get(name_36.text)) {
+                    seen.set(name_36.text, true);
+                }
+                else {
+                    return grammarErrorOnNode(name_36, ts.Diagnostics.JSX_elements_cannot_have_multiple_attributes_with_the_same_name);
+                }
+                var initializer = jsxAttr.initializer;
+                if (initializer && initializer.kind === 256 /* JsxExpression */ && !initializer.expression) {
+                    return grammarErrorOnNode(jsxAttr.initializer, ts.Diagnostics.JSX_attributes_must_only_be_assigned_a_non_empty_expression);
                 }
             }
         }
-        function checkClassExpression(node) {
-            checkClassLikeDeclaration(node);
-            checkNodeDeferred(node);
-            return getTypeOfSymbol(getSymbolOfNode(node));
-        }
-        function checkClassExpressionDeferred(node) {
-            ts.forEach(node.members, checkSourceElement);
-            registerForUnusedIdentifiersCheck(node);
-        }
-        function checkClassDeclaration(node) {
-            if (!node.name && !(ts.getModifierFlags(node) & 512 /* Default */)) {
-                grammarErrorOnFirstToken(node, ts.Diagnostics.A_class_declaration_without_the_default_modifier_must_have_a_name);
+        function checkGrammarForInOrForOfStatement(forInOrOfStatement) {
+            if (checkGrammarStatementInAmbientContext(forInOrOfStatement)) {
+                return true;
             }
-            checkClassLikeDeclaration(node);
-            ts.forEach(node.members, checkSourceElement);
-            registerForUnusedIdentifiersCheck(node);
-        }
-        function checkClassLikeDeclaration(node) {
-            checkGrammarClassDeclarationHeritageClauses(node);
-            checkDecorators(node);
-            if (node.name) {
-                checkTypeNameIsReserved(node.name, ts.Diagnostics.Class_name_cannot_be_0);
-                checkCollisionWithCapturedThisVariable(node, node.name);
-                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
-                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
+            if (forInOrOfStatement.kind === 216 /* ForOfStatement */ && forInOrOfStatement.awaitModifier) {
+                if ((forInOrOfStatement.flags & 16384 /* AwaitContext */) === 0 /* None */) {
+                    return grammarErrorOnNode(forInOrOfStatement.awaitModifier, ts.Diagnostics.A_for_await_of_statement_is_only_allowed_within_an_async_function_or_async_generator);
+                }
             }
-            checkTypeParameters(node.typeParameters);
-            checkExportsOnMergedDeclarations(node);
-            var symbol = getSymbolOfNode(node);
-            var type = getDeclaredTypeOfSymbol(symbol);
-            var typeWithThis = getTypeWithThisArgument(type);
-            var staticType = getTypeOfSymbol(symbol);
-            checkTypeParameterListsIdentical(node, symbol);
-            checkClassForDuplicateDeclarations(node);
-            var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
-            if (baseTypeNode) {
-                var baseTypes = getBaseTypes(type);
-                if (baseTypes.length && produceDiagnostics) {
-                    var baseType_1 = baseTypes[0];
-                    var staticBaseType = getBaseConstructorTypeOfClass(type);
-                    checkBaseTypeAccessibility(staticBaseType, baseTypeNode);
-                    checkSourceElement(baseTypeNode.expression);
-                    if (baseTypeNode.typeArguments) {
-                        ts.forEach(baseTypeNode.typeArguments, checkSourceElement);
-                        for (var _i = 0, _a = getConstructorsForTypeArguments(staticBaseType, baseTypeNode.typeArguments); _i < _a.length; _i++) {
-                            var constructor = _a[_i];
-                            if (!checkTypeArgumentConstraints(constructor.typeParameters, baseTypeNode.typeArguments)) {
-                                break;
-                            }
-                        }
-                    }
-                    checkTypeAssignableTo(typeWithThis, getTypeWithThisArgument(baseType_1, type.thisType), node.name || node, ts.Diagnostics.Class_0_incorrectly_extends_base_class_1);
-                    checkTypeAssignableTo(staticType, getTypeWithoutSignatures(staticBaseType), node.name || node, ts.Diagnostics.Class_static_side_0_incorrectly_extends_base_class_static_side_1);
-                    if (baseType_1.symbol.valueDeclaration && !ts.isInAmbientContext(baseType_1.symbol.valueDeclaration)) {
-                        if (!isBlockScopedNameDeclaredBeforeUse(baseType_1.symbol.valueDeclaration, node)) {
-                            error(baseTypeNode, ts.Diagnostics.A_class_must_be_declared_after_its_base_class);
-                        }
+            if (forInOrOfStatement.initializer.kind === 227 /* VariableDeclarationList */) {
+                var variableList = forInOrOfStatement.initializer;
+                if (!checkGrammarVariableDeclarationList(variableList)) {
+                    var declarations = variableList.declarations;
+                    // declarations.length can be zero if there is an error in variable declaration in for-of or for-in
+                    // See http://www.ecma-international.org/ecma-262/6.0/#sec-for-in-and-for-of-statements for details
+                    // For example:
+                    //      var let = 10;
+                    //      for (let of [1,2,3]) {} // this is invalid ES6 syntax
+                    //      for (let in [1,2,3]) {} // this is invalid ES6 syntax
+                    // We will then want to skip on grammar checking on variableList declaration
+                    if (!declarations.length) {
+                        return false;
                     }
-                    if (!(staticBaseType.symbol && staticBaseType.symbol.flags & 32 /* Class */)) {
-                        // When the static base type is a "class-like" constructor function (but not actually a class), we verify
-                        // that all instantiated base constructor signatures return the same type. We can simply compare the type
-                        // references (as opposed to checking the structure of the types) because elsewhere we have already checked
-                        // that the base type is a class or interface type (and not, for example, an anonymous object type).
-                        var constructors = getInstantiatedConstructorsForTypeArguments(staticBaseType, baseTypeNode.typeArguments);
-                        if (ts.forEach(constructors, function (sig) { return getReturnTypeOfSignature(sig) !== baseType_1; })) {
-                            error(baseTypeNode.expression, ts.Diagnostics.Base_constructors_must_all_have_the_same_return_type);
-                        }
+                    if (declarations.length > 1) {
+                        var diagnostic = forInOrOfStatement.kind === 215 /* ForInStatement */
+                            ? ts.Diagnostics.Only_a_single_variable_declaration_is_allowed_in_a_for_in_statement
+                            : ts.Diagnostics.Only_a_single_variable_declaration_is_allowed_in_a_for_of_statement;
+                        return grammarErrorOnFirstToken(variableList.declarations[1], diagnostic);
                     }
-                    checkKindsOfPropertyMemberOverrides(type, baseType_1);
-                }
-            }
-            var implementedTypeNodes = ts.getClassImplementsHeritageClauseElements(node);
-            if (implementedTypeNodes) {
-                for (var _b = 0, implementedTypeNodes_1 = implementedTypeNodes; _b < implementedTypeNodes_1.length; _b++) {
-                    var typeRefNode = implementedTypeNodes_1[_b];
-                    if (!ts.isEntityNameExpression(typeRefNode.expression)) {
-                        error(typeRefNode.expression, ts.Diagnostics.A_class_can_only_implement_an_identifier_Slashqualified_name_with_optional_type_arguments);
+                    var firstDeclaration = declarations[0];
+                    if (firstDeclaration.initializer) {
+                        var diagnostic = forInOrOfStatement.kind === 215 /* ForInStatement */
+                            ? ts.Diagnostics.The_variable_declaration_of_a_for_in_statement_cannot_have_an_initializer
+                            : ts.Diagnostics.The_variable_declaration_of_a_for_of_statement_cannot_have_an_initializer;
+                        return grammarErrorOnNode(firstDeclaration.name, diagnostic);
                     }
-                    checkTypeReferenceNode(typeRefNode);
-                    if (produceDiagnostics) {
-                        var t = getTypeFromTypeNode(typeRefNode);
-                        if (t !== unknownType) {
-                            var declaredType = (t.flags & 131072 /* Reference */) ? t.target : t;
-                            if (declaredType.flags & (32768 /* Class */ | 65536 /* Interface */)) {
-                                checkTypeAssignableTo(typeWithThis, getTypeWithThisArgument(t, type.thisType), node.name || node, ts.Diagnostics.Class_0_incorrectly_implements_interface_1);
-                            }
-                            else {
-                                error(typeRefNode, ts.Diagnostics.A_class_may_only_implement_another_class_or_interface);
-                            }
-                        }
+                    if (firstDeclaration.type) {
+                        var diagnostic = forInOrOfStatement.kind === 215 /* ForInStatement */
+                            ? ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation
+                            : ts.Diagnostics.The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation;
+                        return grammarErrorOnNode(firstDeclaration, diagnostic);
                     }
                 }
             }
-            if (produceDiagnostics) {
-                checkIndexConstraints(type);
-                checkTypeForDuplicateIndexSignatures(node);
-            }
+            return false;
         }
-        function checkBaseTypeAccessibility(type, node) {
-            var signatures = getSignaturesOfType(type, 1 /* Construct */);
-            if (signatures.length) {
-                var declaration = signatures[0].declaration;
-                if (declaration && ts.getModifierFlags(declaration) & 8 /* Private */) {
-                    var typeClassDeclaration = getClassLikeDeclarationOfSymbol(type.symbol);
-                    if (!isNodeWithinClass(node, typeClassDeclaration)) {
-                        error(node, ts.Diagnostics.Cannot_extend_a_class_0_Class_constructor_is_marked_as_private, node.expression.text);
-                    }
-                }
+        function checkGrammarAccessor(accessor) {
+            var kind = accessor.kind;
+            if (languageVersion < 1 /* ES5 */) {
+                return grammarErrorOnNode(accessor.name, ts.Diagnostics.Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher);
             }
-        }
-        function getTargetSymbol(s) {
-            // if symbol is instantiated its flags are not copied from the 'target'
-            // so we'll need to get back original 'target' symbol to work with correct set of flags
-            return s.flags & 16777216 /* Instantiated */ ? getSymbolLinks(s).target : s;
-        }
-        function getClassLikeDeclarationOfSymbol(symbol) {
-            return ts.forEach(symbol.declarations, function (d) { return ts.isClassLike(d) ? d : undefined; });
-        }
-        function checkKindsOfPropertyMemberOverrides(type, baseType) {
-            // TypeScript 1.0 spec (April 2014): 8.2.3
-            // A derived class inherits all members from its base class it doesn't override.
-            // Inheritance means that a derived class implicitly contains all non - overridden members of the base class.
-            // Both public and private property members are inherited, but only public property members can be overridden.
-            // A property member in a derived class is said to override a property member in a base class
-            // when the derived class property member has the same name and kind(instance or static)
-            // as the base class property member.
-            // The type of an overriding property member must be assignable(section 3.8.4)
-            // to the type of the overridden property member, or otherwise a compile - time error occurs.
-            // Base class instance member functions can be overridden by derived class instance member functions,
-            // but not by other kinds of members.
-            // Base class instance member variables and accessors can be overridden by
-            // derived class instance member variables and accessors, but not by other kinds of members.
-            // NOTE: assignability is checked in checkClassDeclaration
-            var baseProperties = getPropertiesOfObjectType(baseType);
-            for (var _i = 0, baseProperties_1 = baseProperties; _i < baseProperties_1.length; _i++) {
-                var baseProperty = baseProperties_1[_i];
-                var base = getTargetSymbol(baseProperty);
-                if (base.flags & 134217728 /* Prototype */) {
-                    continue;
+            else if (ts.isInAmbientContext(accessor)) {
+                return grammarErrorOnNode(accessor.name, ts.Diagnostics.An_accessor_cannot_be_declared_in_an_ambient_context);
+            }
+            else if (accessor.body === undefined && !(ts.getModifierFlags(accessor) & 128 /* Abstract */)) {
+                return grammarErrorAtPos(ts.getSourceFileOfNode(accessor), accessor.end - 1, ";".length, ts.Diagnostics._0_expected, "{");
+            }
+            else if (accessor.body && ts.getModifierFlags(accessor) & 128 /* Abstract */) {
+                return grammarErrorOnNode(accessor, ts.Diagnostics.An_abstract_accessor_cannot_have_an_implementation);
+            }
+            else if (accessor.typeParameters) {
+                return grammarErrorOnNode(accessor.name, ts.Diagnostics.An_accessor_cannot_have_type_parameters);
+            }
+            else if (!doesAccessorHaveCorrectParameterCount(accessor)) {
+                return grammarErrorOnNode(accessor.name, kind === 153 /* GetAccessor */ ?
+                    ts.Diagnostics.A_get_accessor_cannot_have_parameters :
+                    ts.Diagnostics.A_set_accessor_must_have_exactly_one_parameter);
+            }
+            else if (kind === 154 /* SetAccessor */) {
+                if (accessor.type) {
+                    return grammarErrorOnNode(accessor.name, ts.Diagnostics.A_set_accessor_cannot_have_a_return_type_annotation);
                 }
-                var derived = getTargetSymbol(getPropertyOfObjectType(type, base.name));
-                var baseDeclarationFlags = getDeclarationModifierFlagsFromSymbol(base);
-                ts.Debug.assert(!!derived, "derived should point to something, even if it is the base class' declaration.");
-                if (derived) {
-                    // In order to resolve whether the inherited method was overridden in the base class or not,
-                    // we compare the Symbols obtained. Since getTargetSymbol returns the symbol on the *uninstantiated*
-                    // type declaration, derived and base resolve to the same symbol even in the case of generic classes.
-                    if (derived === base) {
-                        // derived class inherits base without override/redeclaration
-                        var derivedClassDecl = getClassLikeDeclarationOfSymbol(type.symbol);
-                        // It is an error to inherit an abstract member without implementing it or being declared abstract.
-                        // If there is no declaration for the derived class (as in the case of class expressions),
-                        // then the class cannot be declared abstract.
-                        if (baseDeclarationFlags & 128 /* Abstract */ && (!derivedClassDecl || !(ts.getModifierFlags(derivedClassDecl) & 128 /* Abstract */))) {
-                            if (derivedClassDecl.kind === 192 /* ClassExpression */) {
-                                error(derivedClassDecl, ts.Diagnostics.Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1, symbolToString(baseProperty), typeToString(baseType));
-                            }
-                            else {
-                                error(derivedClassDecl, ts.Diagnostics.Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2, typeToString(type), symbolToString(baseProperty), typeToString(baseType));
-                            }
-                        }
+                else {
+                    var parameter = accessor.parameters[0];
+                    if (parameter.dotDotDotToken) {
+                        return grammarErrorOnNode(parameter.dotDotDotToken, ts.Diagnostics.A_set_accessor_cannot_have_rest_parameter);
                     }
-                    else {
-                        // derived overrides base.
-                        var derivedDeclarationFlags = getDeclarationModifierFlagsFromSymbol(derived);
-                        if ((baseDeclarationFlags & 8 /* Private */) || (derivedDeclarationFlags & 8 /* Private */)) {
-                            // either base or derived property is private - not override, skip it
-                            continue;
-                        }
-                        if ((baseDeclarationFlags & 32 /* Static */) !== (derivedDeclarationFlags & 32 /* Static */)) {
-                            // value of 'static' is not the same for properties - not override, skip it
-                            continue;
-                        }
-                        if ((base.flags & derived.flags & 8192 /* Method */) || ((base.flags & 98308 /* PropertyOrAccessor */) && (derived.flags & 98308 /* PropertyOrAccessor */))) {
-                            // method is overridden with method or property/accessor is overridden with property/accessor - correct case
-                            continue;
-                        }
-                        var errorMessage = void 0;
-                        if (base.flags & 8192 /* Method */) {
-                            if (derived.flags & 98304 /* Accessor */) {
-                                errorMessage = ts.Diagnostics.Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_accessor;
-                            }
-                            else {
-                                ts.Debug.assert((derived.flags & 4 /* Property */) !== 0);
-                                errorMessage = ts.Diagnostics.Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_property;
-                            }
-                        }
-                        else if (base.flags & 4 /* Property */) {
-                            ts.Debug.assert((derived.flags & 8192 /* Method */) !== 0);
-                            errorMessage = ts.Diagnostics.Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_function;
-                        }
-                        else {
-                            ts.Debug.assert((base.flags & 98304 /* Accessor */) !== 0);
-                            ts.Debug.assert((derived.flags & 8192 /* Method */) !== 0);
-                            errorMessage = ts.Diagnostics.Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_function;
-                        }
-                        error(derived.valueDeclaration.name, errorMessage, typeToString(baseType), symbolToString(base), typeToString(type));
+                    else if (parameter.questionToken) {
+                        return grammarErrorOnNode(parameter.questionToken, ts.Diagnostics.A_set_accessor_cannot_have_an_optional_parameter);
+                    }
+                    else if (parameter.initializer) {
+                        return grammarErrorOnNode(accessor.name, ts.Diagnostics.A_set_accessor_parameter_cannot_have_an_initializer);
                     }
                 }
             }
         }
-        function isAccessor(kind) {
-            return kind === 149 /* GetAccessor */ || kind === 150 /* SetAccessor */;
+        /** Does the accessor have the right number of parameters?
+         * A get accessor has no parameters or a single `this` parameter.
+         * A set accessor has one parameter or a `this` parameter and one more parameter.
+         */
+        function doesAccessorHaveCorrectParameterCount(accessor) {
+            return getAccessorThisParameter(accessor) || accessor.parameters.length === (accessor.kind === 153 /* GetAccessor */ ? 0 : 1);
+        }
+        function getAccessorThisParameter(accessor) {
+            if (accessor.parameters.length === (accessor.kind === 153 /* GetAccessor */ ? 1 : 2)) {
+                return ts.getThisParameter(accessor);
+            }
+        }
+        function checkGrammarForNonSymbolComputedProperty(node, message) {
+            if (ts.isDynamicName(node)) {
+                return grammarErrorOnNode(node, message);
+            }
         }
-        function areTypeParametersIdentical(list1, list2) {
-            if (!list1 && !list2) {
+        function checkGrammarMethod(node) {
+            if (checkGrammarDisallowedModifiersOnObjectLiteralExpressionMethod(node) ||
+                checkGrammarFunctionLikeDeclaration(node) ||
+                checkGrammarForGenerator(node)) {
                 return true;
             }
-            if (!list1 || !list2 || list1.length !== list2.length) {
-                return false;
-            }
-            // TypeScript 1.0 spec (April 2014):
-            // When a generic interface has multiple declarations,  all declarations must have identical type parameter
-            // lists, i.e. identical type parameter names with identical constraints in identical order.
-            for (var i = 0, len = list1.length; i < len; i++) {
-                var tp1 = list1[i];
-                var tp2 = list2[i];
-                if (tp1.name.text !== tp2.name.text) {
-                    return false;
+            if (node.parent.kind === 178 /* ObjectLiteralExpression */) {
+                if (checkGrammarForInvalidQuestionMark(node.questionToken, ts.Diagnostics.An_object_member_cannot_be_declared_optional)) {
+                    return true;
                 }
-                if (!tp1.constraint && !tp2.constraint) {
-                    continue;
+                else if (node.body === undefined) {
+                    return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.end - 1, ";".length, ts.Diagnostics._0_expected, "{");
                 }
-                if (!tp1.constraint || !tp2.constraint) {
-                    return false;
+            }
+            if (ts.isClassLike(node.parent)) {
+                // Technically, computed properties in ambient contexts is disallowed
+                // for property declarations and accessors too, not just methods.
+                // However, property declarations disallow computed names in general,
+                // and accessors are not allowed in ambient contexts in general,
+                // so this error only really matters for methods.
+                if (ts.isInAmbientContext(node)) {
+                    return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_an_ambient_context_must_directly_refer_to_a_built_in_symbol);
                 }
-                if (!isTypeIdenticalTo(getTypeFromTypeNode(tp1.constraint), getTypeFromTypeNode(tp2.constraint))) {
-                    return false;
+                else if (!node.body) {
+                    return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_method_overload_must_directly_refer_to_a_built_in_symbol);
                 }
             }
-            return true;
-        }
-        function checkInheritedPropertiesAreIdentical(type, typeNode) {
-            var baseTypes = getBaseTypes(type);
-            if (baseTypes.length < 2) {
-                return true;
+            else if (node.parent.kind === 230 /* InterfaceDeclaration */) {
+                return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol);
             }
-            var seen = ts.createMap();
-            ts.forEach(resolveDeclaredMembers(type).declaredProperties, function (p) { seen[p.name] = { prop: p, containingType: type }; });
-            var ok = true;
-            for (var _i = 0, baseTypes_2 = baseTypes; _i < baseTypes_2.length; _i++) {
-                var base = baseTypes_2[_i];
-                var properties = getPropertiesOfObjectType(getTypeWithThisArgument(base, type.thisType));
-                for (var _a = 0, properties_5 = properties; _a < properties_5.length; _a++) {
-                    var prop = properties_5[_a];
-                    var existing = seen[prop.name];
-                    if (!existing) {
-                        seen[prop.name] = { prop: prop, containingType: base };
-                    }
-                    else {
-                        var isInheritedProperty = existing.containingType !== type;
-                        if (isInheritedProperty && !isPropertyIdenticalTo(existing.prop, prop)) {
-                            ok = false;
-                            var typeName1 = typeToString(existing.containingType);
-                            var typeName2 = typeToString(base);
-                            var errorInfo = ts.chainDiagnosticMessages(undefined, ts.Diagnostics.Named_property_0_of_types_1_and_2_are_not_identical, symbolToString(prop), typeName1, typeName2);
-                            errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.Interface_0_cannot_simultaneously_extend_types_1_and_2, typeToString(type), typeName1, typeName2);
-                            diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(typeNode, errorInfo));
-                        }
-                    }
-                }
+            else if (node.parent.kind === 163 /* TypeLiteral */) {
+                return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol);
             }
-            return ok;
         }
-        function checkInterfaceDeclaration(node) {
-            // Grammar checking
-            checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarInterfaceDeclaration(node);
-            checkTypeParameters(node.typeParameters);
-            if (produceDiagnostics) {
-                checkTypeNameIsReserved(node.name, ts.Diagnostics.Interface_name_cannot_be_0);
-                checkExportsOnMergedDeclarations(node);
-                var symbol = getSymbolOfNode(node);
-                checkTypeParameterListsIdentical(node, symbol);
-                // Only check this symbol once
-                var firstInterfaceDecl = ts.getDeclarationOfKind(symbol, 222 /* InterfaceDeclaration */);
-                if (node === firstInterfaceDecl) {
-                    var type = getDeclaredTypeOfSymbol(symbol);
-                    var typeWithThis = getTypeWithThisArgument(type);
-                    // run subsequent checks only if first set succeeded
-                    if (checkInheritedPropertiesAreIdentical(type, node.name)) {
-                        for (var _i = 0, _a = getBaseTypes(type); _i < _a.length; _i++) {
-                            var baseType = _a[_i];
-                            checkTypeAssignableTo(typeWithThis, getTypeWithThisArgument(baseType, type.thisType), node.name, ts.Diagnostics.Interface_0_incorrectly_extends_interface_1);
+        function checkGrammarBreakOrContinueStatement(node) {
+            var current = node;
+            while (current) {
+                if (ts.isFunctionLike(current)) {
+                    return grammarErrorOnNode(node, ts.Diagnostics.Jump_target_cannot_cross_function_boundary);
+                }
+                switch (current.kind) {
+                    case 222 /* LabeledStatement */:
+                        if (node.label && current.label.text === node.label.text) {
+                            // found matching label - verify that label usage is correct
+                            // continue can only target labels that are on iteration statements
+                            var isMisplacedContinueLabel = node.kind === 217 /* ContinueStatement */
+                                && !ts.isIterationStatement(current.statement, /*lookInLabeledStatement*/ true);
+                            if (isMisplacedContinueLabel) {
+                                return grammarErrorOnNode(node, ts.Diagnostics.A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement);
+                            }
+                            return false;
                         }
-                        checkIndexConstraints(type);
-                    }
+                        break;
+                    case 221 /* SwitchStatement */:
+                        if (node.kind === 218 /* BreakStatement */ && !node.label) {
+                            // unlabeled break within switch statement - ok
+                            return false;
+                        }
+                        break;
+                    default:
+                        if (ts.isIterationStatement(current, /*lookInLabeledStatement*/ false) && !node.label) {
+                            // unlabeled break or continue within iteration statement - ok
+                            return false;
+                        }
+                        break;
                 }
-                checkObjectTypeForDuplicateDeclarations(node);
+                current = current.parent;
             }
-            ts.forEach(ts.getInterfaceBaseTypeNodes(node), function (heritageElement) {
-                if (!ts.isEntityNameExpression(heritageElement.expression)) {
-                    error(heritageElement.expression, ts.Diagnostics.An_interface_can_only_extend_an_identifier_Slashqualified_name_with_optional_type_arguments);
+            if (node.label) {
+                var message = node.kind === 218 /* BreakStatement */
+                    ? ts.Diagnostics.A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement
+                    : ts.Diagnostics.A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement;
+                return grammarErrorOnNode(node, message);
+            }
+            else {
+                var message = node.kind === 218 /* BreakStatement */
+                    ? ts.Diagnostics.A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement
+                    : ts.Diagnostics.A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement;
+                return grammarErrorOnNode(node, message);
+            }
+        }
+        function checkGrammarBindingElement(node) {
+            if (node.dotDotDotToken) {
+                var elements = node.parent.elements;
+                if (node !== ts.lastOrUndefined(elements)) {
+                    return grammarErrorOnNode(node, ts.Diagnostics.A_rest_element_must_be_last_in_a_destructuring_pattern);
+                }
+                if (node.name.kind === 175 /* ArrayBindingPattern */ || node.name.kind === 174 /* ObjectBindingPattern */) {
+                    return grammarErrorOnNode(node.name, ts.Diagnostics.A_rest_element_cannot_contain_a_binding_pattern);
+                }
+                if (node.initializer) {
+                    // Error on equals token which immediately precedes the initializer
+                    return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.initializer.pos - 1, 1, ts.Diagnostics.A_rest_element_cannot_have_an_initializer);
                 }
-                checkTypeReferenceNode(heritageElement);
-            });
-            ts.forEach(node.members, checkSourceElement);
-            if (produceDiagnostics) {
-                checkTypeForDuplicateIndexSignatures(node);
-                registerForUnusedIdentifiersCheck(node);
             }
         }
-        function checkTypeAliasDeclaration(node) {
-            // Grammar checking
-            checkGrammarDecorators(node) || checkGrammarModifiers(node);
-            checkTypeNameIsReserved(node.name, ts.Diagnostics.Type_alias_name_cannot_be_0);
-            checkSourceElement(node.type);
+        function isStringOrNumberLiteralExpression(expr) {
+            return expr.kind === 9 /* StringLiteral */ || expr.kind === 8 /* NumericLiteral */ ||
+                expr.kind === 192 /* PrefixUnaryExpression */ && expr.operator === 38 /* MinusToken */ &&
+                    expr.operand.kind === 8 /* NumericLiteral */;
         }
-        function computeEnumMemberValues(node) {
-            var nodeLinks = getNodeLinks(node);
-            if (!(nodeLinks.flags & 16384 /* EnumValuesComputed */)) {
-                var enumSymbol = getSymbolOfNode(node);
-                var enumType = getDeclaredTypeOfSymbol(enumSymbol);
-                var autoValue = 0; // set to undefined when enum member is non-constant
-                var ambient = ts.isInAmbientContext(node);
-                var enumIsConst = ts.isConst(node);
-                for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
-                    var member = _a[_i];
-                    if (isComputedNonLiteralName(member.name)) {
-                        error(member.name, ts.Diagnostics.Computed_property_names_are_not_allowed_in_enums);
-                    }
-                    else {
-                        var text = getTextOfPropertyName(member.name);
-                        if (isNumericLiteralName(text) && !isInfinityOrNaNString(text)) {
-                            error(member.name, ts.Diagnostics.An_enum_member_cannot_have_a_numeric_name);
+        function checkGrammarVariableDeclaration(node) {
+            if (node.parent.parent.kind !== 215 /* ForInStatement */ && node.parent.parent.kind !== 216 /* ForOfStatement */) {
+                if (ts.isInAmbientContext(node)) {
+                    if (node.initializer) {
+                        if (ts.isConst(node) && !node.type) {
+                            if (!isStringOrNumberLiteralExpression(node.initializer)) {
+                                return grammarErrorOnNode(node.initializer, ts.Diagnostics.A_const_initializer_in_an_ambient_context_must_be_a_string_or_numeric_literal);
+                            }
+                        }
+                        else {
+                            // Error on equals token which immediate precedes the initializer
+                            var equalsTokenLength = "=".length;
+                            return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.initializer.pos - equalsTokenLength, equalsTokenLength, ts.Diagnostics.Initializers_are_not_allowed_in_ambient_contexts);
                         }
                     }
-                    var previousEnumMemberIsNonConstant = autoValue === undefined;
-                    var initializer = member.initializer;
-                    if (initializer) {
-                        autoValue = computeConstantValueForEnumMemberInitializer(initializer, enumType, enumIsConst, ambient);
-                    }
-                    else if (ambient && !enumIsConst) {
-                        // In ambient enum declarations that specify no const modifier, enum member declarations
-                        // that omit a value are considered computed members (as opposed to having auto-incremented values assigned).
-                        autoValue = undefined;
+                    if (node.initializer && !(ts.isConst(node) && isStringOrNumberLiteralExpression(node.initializer))) {
+                        // Error on equals token which immediate precedes the initializer
+                        var equalsTokenLength = "=".length;
+                        return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.initializer.pos - equalsTokenLength, equalsTokenLength, ts.Diagnostics.Initializers_are_not_allowed_in_ambient_contexts);
                     }
-                    else if (previousEnumMemberIsNonConstant) {
-                        // If the member declaration specifies no value, the member is considered a constant enum member.
-                        // If the member is the first member in the enum declaration, it is assigned the value zero.
-                        // Otherwise, it is assigned the value of the immediately preceding member plus one,
-                        // and an error occurs if the immediately preceding member is not a constant enum member
-                        error(member.name, ts.Diagnostics.Enum_member_must_have_initializer);
+                }
+                else if (!node.initializer) {
+                    if (ts.isBindingPattern(node.name) && !ts.isBindingPattern(node.parent)) {
+                        return grammarErrorOnNode(node, ts.Diagnostics.A_destructuring_declaration_must_have_an_initializer);
                     }
-                    if (autoValue !== undefined) {
-                        getNodeLinks(member).enumMemberValue = autoValue;
-                        autoValue++;
+                    if (ts.isConst(node)) {
+                        return grammarErrorOnNode(node, ts.Diagnostics.const_declarations_must_be_initialized);
                     }
                 }
-                nodeLinks.flags |= 16384 /* EnumValuesComputed */;
             }
-            function computeConstantValueForEnumMemberInitializer(initializer, enumType, enumIsConst, ambient) {
-                // Controls if error should be reported after evaluation of constant value is completed
-                // Can be false if another more precise error was already reported during evaluation.
-                var reportError = true;
-                var value = evalConstant(initializer);
-                if (reportError) {
-                    if (value === undefined) {
-                        if (enumIsConst) {
-                            error(initializer, ts.Diagnostics.In_const_enum_declarations_member_initializer_must_be_constant_expression);
-                        }
-                        else if (ambient) {
-                            error(initializer, ts.Diagnostics.In_ambient_enum_declarations_member_initializer_must_be_constant_expression);
-                        }
-                        else {
-                            // Only here do we need to check that the initializer is assignable to the enum type.
-                            checkTypeAssignableTo(checkExpression(initializer), enumType, initializer, /*headMessage*/ undefined);
-                        }
-                    }
-                    else if (enumIsConst) {
-                        if (isNaN(value)) {
-                            error(initializer, ts.Diagnostics.const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN);
-                        }
-                        else if (!isFinite(value)) {
-                            error(initializer, ts.Diagnostics.const_enum_member_initializer_was_evaluated_to_a_non_finite_value);
-                        }
+            if (compilerOptions.module !== ts.ModuleKind.ES2015 && compilerOptions.module !== ts.ModuleKind.System && !compilerOptions.noEmit &&
+                !ts.isInAmbientContext(node.parent.parent) && ts.hasModifier(node.parent.parent, 1 /* Export */)) {
+                checkESModuleMarker(node.name);
+            }
+            var checkLetConstNames = (ts.isLet(node) || ts.isConst(node));
+            // 1. LexicalDeclaration : LetOrConst BindingList ;
+            // It is a Syntax Error if the BoundNames of BindingList contains "let".
+            // 2. ForDeclaration: ForDeclaration : LetOrConst ForBinding
+            // It is a Syntax Error if the BoundNames of ForDeclaration contains "let".
+            // It is a SyntaxError if a VariableDeclaration or VariableDeclarationNoIn occurs within strict code
+            // and its Identifier is eval or arguments
+            return checkLetConstNames && checkGrammarNameInLetOrConstDeclarations(node.name);
+        }
+        function checkESModuleMarker(name) {
+            if (name.kind === 71 /* Identifier */) {
+                if (ts.unescapeIdentifier(name.text) === "__esModule") {
+                    return grammarErrorOnNode(name, ts.Diagnostics.Identifier_expected_esModule_is_reserved_as_an_exported_marker_when_transforming_ECMAScript_modules);
+                }
+            }
+            else {
+                var elements = name.elements;
+                for (var _i = 0, elements_2 = elements; _i < elements_2.length; _i++) {
+                    var element = elements_2[_i];
+                    if (!ts.isOmittedExpression(element)) {
+                        return checkESModuleMarker(element.name);
                     }
                 }
-                return value;
-                function evalConstant(e) {
-                    switch (e.kind) {
-                        case 185 /* PrefixUnaryExpression */:
-                            var value_1 = evalConstant(e.operand);
-                            if (value_1 === undefined) {
-                                return undefined;
-                            }
-                            switch (e.operator) {
-                                case 35 /* PlusToken */: return value_1;
-                                case 36 /* MinusToken */: return -value_1;
-                                case 50 /* TildeToken */: return ~value_1;
-                            }
-                            return undefined;
-                        case 187 /* BinaryExpression */:
-                            var left = evalConstant(e.left);
-                            if (left === undefined) {
-                                return undefined;
-                            }
-                            var right = evalConstant(e.right);
-                            if (right === undefined) {
-                                return undefined;
-                            }
-                            switch (e.operatorToken.kind) {
-                                case 47 /* BarToken */: return left | right;
-                                case 46 /* AmpersandToken */: return left & right;
-                                case 44 /* GreaterThanGreaterThanToken */: return left >> right;
-                                case 45 /* GreaterThanGreaterThanGreaterThanToken */: return left >>> right;
-                                case 43 /* LessThanLessThanToken */: return left << right;
-                                case 48 /* CaretToken */: return left ^ right;
-                                case 37 /* AsteriskToken */: return left * right;
-                                case 39 /* SlashToken */: return left / right;
-                                case 35 /* PlusToken */: return left + right;
-                                case 36 /* MinusToken */: return left - right;
-                                case 40 /* PercentToken */: return left % right;
-                            }
-                            return undefined;
-                        case 8 /* NumericLiteral */:
-                            return +e.text;
-                        case 178 /* ParenthesizedExpression */:
-                            return evalConstant(e.expression);
-                        case 69 /* Identifier */:
-                        case 173 /* ElementAccessExpression */:
-                        case 172 /* PropertyAccessExpression */:
-                            var member = initializer.parent;
-                            var currentType = getTypeOfSymbol(getSymbolOfNode(member.parent));
-                            var enumType_1;
-                            var propertyName = void 0;
-                            if (e.kind === 69 /* Identifier */) {
-                                // unqualified names can refer to member that reside in different declaration of the enum so just doing name resolution won't work.
-                                // instead pick current enum type and later try to fetch member from the type
-                                enumType_1 = currentType;
-                                propertyName = e.text;
-                            }
-                            else {
-                                var expression = void 0;
-                                if (e.kind === 173 /* ElementAccessExpression */) {
-                                    if (e.argumentExpression === undefined ||
-                                        e.argumentExpression.kind !== 9 /* StringLiteral */) {
-                                        return undefined;
-                                    }
-                                    expression = e.expression;
-                                    propertyName = e.argumentExpression.text;
-                                }
-                                else {
-                                    expression = e.expression;
-                                    propertyName = e.name.text;
-                                }
-                                // expression part in ElementAccess\PropertyAccess should be either identifier or dottedName
-                                var current = expression;
-                                while (current) {
-                                    if (current.kind === 69 /* Identifier */) {
-                                        break;
-                                    }
-                                    else if (current.kind === 172 /* PropertyAccessExpression */) {
-                                        current = current.expression;
-                                    }
-                                    else {
-                                        return undefined;
-                                    }
-                                }
-                                enumType_1 = checkExpression(expression);
-                                // allow references to constant members of other enums
-                                if (!(enumType_1.symbol && (enumType_1.symbol.flags & 384 /* Enum */))) {
-                                    return undefined;
-                                }
-                            }
-                            if (propertyName === undefined) {
-                                return undefined;
-                            }
-                            var property = getPropertyOfObjectType(enumType_1, propertyName);
-                            if (!property || !(property.flags & 8 /* EnumMember */)) {
-                                return undefined;
-                            }
-                            var propertyDecl = property.valueDeclaration;
-                            // self references are illegal
-                            if (member === propertyDecl) {
-                                return undefined;
-                            }
-                            // illegal case: forward reference
-                            if (!isBlockScopedNameDeclaredBeforeUse(propertyDecl, member)) {
-                                reportError = false;
-                                error(e, ts.Diagnostics.A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums);
-                                return undefined;
-                            }
-                            return getNodeLinks(propertyDecl).enumMemberValue;
+            }
+        }
+        function checkGrammarNameInLetOrConstDeclarations(name) {
+            if (name.kind === 71 /* Identifier */) {
+                if (name.originalKeywordKind === 110 /* LetKeyword */) {
+                    return grammarErrorOnNode(name, ts.Diagnostics.let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations);
+                }
+            }
+            else {
+                var elements = name.elements;
+                for (var _i = 0, elements_3 = elements; _i < elements_3.length; _i++) {
+                    var element = elements_3[_i];
+                    if (!ts.isOmittedExpression(element)) {
+                        checkGrammarNameInLetOrConstDeclarations(element.name);
                     }
                 }
             }
         }
-        function checkEnumDeclaration(node) {
-            if (!produceDiagnostics) {
-                return;
+        function checkGrammarVariableDeclarationList(declarationList) {
+            var declarations = declarationList.declarations;
+            if (checkGrammarForDisallowedTrailingComma(declarationList.declarations)) {
+                return true;
             }
-            // Grammar checking
-            checkGrammarDecorators(node) || checkGrammarModifiers(node);
-            checkTypeNameIsReserved(node.name, ts.Diagnostics.Enum_name_cannot_be_0);
-            checkCollisionWithCapturedThisVariable(node, node.name);
-            checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
-            checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
-            checkExportsOnMergedDeclarations(node);
-            computeEnumMemberValues(node);
-            var enumIsConst = ts.isConst(node);
-            if (compilerOptions.isolatedModules && enumIsConst && ts.isInAmbientContext(node)) {
-                error(node.name, ts.Diagnostics.Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided);
+            if (!declarationList.declarations.length) {
+                return grammarErrorAtPos(ts.getSourceFileOfNode(declarationList), declarations.pos, declarations.end - declarations.pos, ts.Diagnostics.Variable_declaration_list_cannot_be_empty);
             }
-            // Spec 2014 - Section 9.3:
-            // It isn't possible for one enum declaration to continue the automatic numbering sequence of another,
-            // and when an enum type has multiple declarations, only one declaration is permitted to omit a value
-            // for the first member.
-            //
-            // Only perform this check once per symbol
-            var enumSymbol = getSymbolOfNode(node);
-            var firstDeclaration = ts.getDeclarationOfKind(enumSymbol, node.kind);
-            if (node === firstDeclaration) {
-                if (enumSymbol.declarations.length > 1) {
-                    // check that const is placed\omitted on all enum declarations
-                    ts.forEach(enumSymbol.declarations, function (decl) {
-                        if (ts.isConstEnumDeclaration(decl) !== enumIsConst) {
-                            error(decl.name, ts.Diagnostics.Enum_declarations_must_all_be_const_or_non_const);
-                        }
-                    });
+        }
+        function allowLetAndConstDeclarations(parent) {
+            switch (parent.kind) {
+                case 211 /* IfStatement */:
+                case 212 /* DoStatement */:
+                case 213 /* WhileStatement */:
+                case 220 /* WithStatement */:
+                case 214 /* ForStatement */:
+                case 215 /* ForInStatement */:
+                case 216 /* ForOfStatement */:
+                    return false;
+                case 222 /* LabeledStatement */:
+                    return allowLetAndConstDeclarations(parent.parent);
+            }
+            return true;
+        }
+        function checkGrammarForDisallowedLetOrConstStatement(node) {
+            if (!allowLetAndConstDeclarations(node.parent)) {
+                if (ts.isLet(node.declarationList)) {
+                    return grammarErrorOnNode(node, ts.Diagnostics.let_declarations_can_only_be_declared_inside_a_block);
+                }
+                else if (ts.isConst(node.declarationList)) {
+                    return grammarErrorOnNode(node, ts.Diagnostics.const_declarations_can_only_be_declared_inside_a_block);
                 }
-                var seenEnumMissingInitialInitializer_1 = false;
-                ts.forEach(enumSymbol.declarations, function (declaration) {
-                    // return true if we hit a violation of the rule, false otherwise
-                    if (declaration.kind !== 224 /* EnumDeclaration */) {
-                        return false;
-                    }
-                    var enumDeclaration = declaration;
-                    if (!enumDeclaration.members.length) {
-                        return false;
-                    }
-                    var firstEnumMember = enumDeclaration.members[0];
-                    if (!firstEnumMember.initializer) {
-                        if (seenEnumMissingInitialInitializer_1) {
-                            error(firstEnumMember.name, ts.Diagnostics.In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enum_element);
-                        }
-                        else {
-                            seenEnumMissingInitialInitializer_1 = true;
-                        }
-                    }
-                });
             }
         }
-        function getFirstNonAmbientClassOrFunctionDeclaration(symbol) {
-            var declarations = symbol.declarations;
-            for (var _i = 0, declarations_5 = declarations; _i < declarations_5.length; _i++) {
-                var declaration = declarations_5[_i];
-                if ((declaration.kind === 221 /* ClassDeclaration */ ||
-                    (declaration.kind === 220 /* FunctionDeclaration */ && ts.nodeIsPresent(declaration.body))) &&
-                    !ts.isInAmbientContext(declaration)) {
-                    return declaration;
+        function checkGrammarMetaProperty(node) {
+            if (node.keywordToken === 94 /* NewKeyword */) {
+                if (node.name.text !== "target") {
+                    return grammarErrorOnNode(node.name, ts.Diagnostics._0_is_not_a_valid_meta_property_for_keyword_1_Did_you_mean_2, node.name.text, ts.tokenToString(node.keywordToken), "target");
                 }
             }
-            return undefined;
         }
-        function inSameLexicalScope(node1, node2) {
-            var container1 = ts.getEnclosingBlockScopeContainer(node1);
-            var container2 = ts.getEnclosingBlockScopeContainer(node2);
-            if (isGlobalSourceFile(container1)) {
-                return isGlobalSourceFile(container2);
+        function hasParseDiagnostics(sourceFile) {
+            return sourceFile.parseDiagnostics.length > 0;
+        }
+        function grammarErrorOnFirstToken(node, message, arg0, arg1, arg2) {
+            var sourceFile = ts.getSourceFileOfNode(node);
+            if (!hasParseDiagnostics(sourceFile)) {
+                var span_4 = ts.getSpanOfTokenAtPosition(sourceFile, node.pos);
+                diagnostics.add(ts.createFileDiagnostic(sourceFile, span_4.start, span_4.length, message, arg0, arg1, arg2));
+                return true;
             }
-            else if (isGlobalSourceFile(container2)) {
-                return false;
+        }
+        function grammarErrorAtPos(sourceFile, start, length, message, arg0, arg1, arg2) {
+            if (!hasParseDiagnostics(sourceFile)) {
+                diagnostics.add(ts.createFileDiagnostic(sourceFile, start, length, message, arg0, arg1, arg2));
+                return true;
             }
-            else {
-                return container1 === container2;
+        }
+        function grammarErrorOnNode(node, message, arg0, arg1, arg2) {
+            var sourceFile = ts.getSourceFileOfNode(node);
+            if (!hasParseDiagnostics(sourceFile)) {
+                diagnostics.add(ts.createDiagnosticForNode(node, message, arg0, arg1, arg2));
+                return true;
             }
         }
-        function checkModuleDeclaration(node) {
-            if (produceDiagnostics) {
-                // Grammar checking
-                var isGlobalAugmentation = ts.isGlobalScopeAugmentation(node);
-                var inAmbientContext = ts.isInAmbientContext(node);
-                if (isGlobalAugmentation && !inAmbientContext) {
-                    error(node.name, ts.Diagnostics.Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambient_context);
+        function checkGrammarConstructorTypeParameters(node) {
+            if (node.typeParameters) {
+                return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.typeParameters.pos, node.typeParameters.end - node.typeParameters.pos, ts.Diagnostics.Type_parameters_cannot_appear_on_a_constructor_declaration);
+            }
+        }
+        function checkGrammarConstructorTypeAnnotation(node) {
+            if (node.type) {
+                return grammarErrorOnNode(node.type, ts.Diagnostics.Type_annotation_cannot_appear_on_a_constructor_declaration);
+            }
+        }
+        function checkGrammarProperty(node) {
+            if (ts.isClassLike(node.parent)) {
+                if (checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_class_property_declaration_must_directly_refer_to_a_built_in_symbol)) {
+                    return true;
                 }
-                var isAmbientExternalModule = ts.isAmbientModule(node);
-                var contextErrorMessage = isAmbientExternalModule
-                    ? ts.Diagnostics.An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file
-                    : ts.Diagnostics.A_namespace_declaration_is_only_allowed_in_a_namespace_or_module;
-                if (checkGrammarModuleElementContext(node, contextErrorMessage)) {
-                    // If we hit a module declaration in an illegal context, just bail out to avoid cascading errors.
-                    return;
+            }
+            else if (node.parent.kind === 230 /* InterfaceDeclaration */) {
+                if (checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol)) {
+                    return true;
                 }
-                if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node)) {
-                    if (!inAmbientContext && node.name.kind === 9 /* StringLiteral */) {
-                        grammarErrorOnNode(node.name, ts.Diagnostics.Only_ambient_modules_can_use_quoted_names);
-                    }
+                if (node.initializer) {
+                    return grammarErrorOnNode(node.initializer, ts.Diagnostics.An_interface_property_cannot_have_an_initializer);
                 }
-                checkCollisionWithCapturedThisVariable(node, node.name);
-                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
-                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
-                checkExportsOnMergedDeclarations(node);
-                var symbol = getSymbolOfNode(node);
-                // The following checks only apply on a non-ambient instantiated module declaration.
-                if (symbol.flags & 512 /* ValueModule */
-                    && symbol.declarations.length > 1
-                    && !inAmbientContext
-                    && ts.isInstantiatedModule(node, compilerOptions.preserveConstEnums || compilerOptions.isolatedModules)) {
-                    var firstNonAmbientClassOrFunc = getFirstNonAmbientClassOrFunctionDeclaration(symbol);
-                    if (firstNonAmbientClassOrFunc) {
-                        if (ts.getSourceFileOfNode(node) !== ts.getSourceFileOfNode(firstNonAmbientClassOrFunc)) {
-                            error(node.name, ts.Diagnostics.A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merged);
-                        }
-                        else if (node.pos < firstNonAmbientClassOrFunc.pos) {
-                            error(node.name, ts.Diagnostics.A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged);
-                        }
-                    }
-                    // if the module merges with a class declaration in the same lexical scope,
-                    // we need to track this to ensure the correct emit.
-                    var mergedClass = ts.getDeclarationOfKind(symbol, 221 /* ClassDeclaration */);
-                    if (mergedClass &&
-                        inSameLexicalScope(node, mergedClass)) {
-                        getNodeLinks(node).flags |= 32768 /* LexicalModuleMergesWithClass */;
-                    }
+            }
+            else if (node.parent.kind === 163 /* TypeLiteral */) {
+                if (checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol)) {
+                    return true;
                 }
-                if (isAmbientExternalModule) {
-                    if (ts.isExternalModuleAugmentation(node)) {
-                        // body of the augmentation should be checked for consistency only if augmentation was applied to its target (either global scope or module)
-                        // otherwise we'll be swamped in cascading errors.
-                        // We can detect if augmentation was applied using following rules:
-                        // - augmentation for a global scope is always applied
-                        // - augmentation for some external module is applied if symbol for augmentation is merged (it was combined with target module).
-                        var checkBody = isGlobalAugmentation || (getSymbolOfNode(node).flags & 33554432 /* Merged */);
-                        if (checkBody && node.body) {
-                            // body of ambient external module is always a module block
-                            for (var _i = 0, _a = node.body.statements; _i < _a.length; _i++) {
-                                var statement = _a[_i];
-                                checkModuleAugmentationElement(statement, isGlobalAugmentation);
-                            }
-                        }
-                    }
-                    else if (isGlobalSourceFile(node.parent)) {
-                        if (isGlobalAugmentation) {
-                            error(node.name, ts.Diagnostics.Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations);
-                        }
-                        else if (ts.isExternalModuleNameRelative(node.name.text)) {
-                            error(node.name, ts.Diagnostics.Ambient_module_declaration_cannot_specify_relative_module_name);
-                        }
+                if (node.initializer) {
+                    return grammarErrorOnNode(node.initializer, ts.Diagnostics.A_type_literal_property_cannot_have_an_initializer);
+                }
+            }
+            if (ts.isInAmbientContext(node) && node.initializer) {
+                return grammarErrorOnFirstToken(node.initializer, ts.Diagnostics.Initializers_are_not_allowed_in_ambient_contexts);
+            }
+        }
+        function checkGrammarTopLevelElementForRequiredDeclareModifier(node) {
+            // A declare modifier is required for any top level .d.ts declaration except export=, export default, export as namespace
+            // interfaces and imports categories:
+            //
+            //  DeclarationElement:
+            //     ExportAssignment
+            //     export_opt   InterfaceDeclaration
+            //     export_opt   TypeAliasDeclaration
+            //     export_opt   ImportDeclaration
+            //     export_opt   ExternalImportDeclaration
+            //     export_opt   AmbientDeclaration
+            //
+            // TODO: The spec needs to be amended to reflect this grammar.
+            if (node.kind === 230 /* InterfaceDeclaration */ ||
+                node.kind === 231 /* TypeAliasDeclaration */ ||
+                node.kind === 238 /* ImportDeclaration */ ||
+                node.kind === 237 /* ImportEqualsDeclaration */ ||
+                node.kind === 244 /* ExportDeclaration */ ||
+                node.kind === 243 /* ExportAssignment */ ||
+                node.kind === 236 /* NamespaceExportDeclaration */ ||
+                ts.getModifierFlags(node) & (2 /* Ambient */ | 1 /* Export */ | 512 /* Default */)) {
+                return false;
+            }
+            return grammarErrorOnFirstToken(node, ts.Diagnostics.A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file);
+        }
+        function checkGrammarTopLevelElementsForRequiredDeclareModifier(file) {
+            for (var _i = 0, _a = file.statements; _i < _a.length; _i++) {
+                var decl = _a[_i];
+                if (ts.isDeclaration(decl) || decl.kind === 208 /* VariableStatement */) {
+                    if (checkGrammarTopLevelElementForRequiredDeclareModifier(decl)) {
+                        return true;
                     }
-                    else {
-                        if (isGlobalAugmentation) {
-                            error(node.name, ts.Diagnostics.Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations);
-                        }
-                        else {
-                            // Node is not an augmentation and is not located on the script level.
-                            // This means that this is declaration of ambient module that is located in other module or namespace which is prohibited.
-                            error(node.name, ts.Diagnostics.Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces);
-                        }
+                }
+            }
+        }
+        function checkGrammarSourceFile(node) {
+            return ts.isInAmbientContext(node) && checkGrammarTopLevelElementsForRequiredDeclareModifier(node);
+        }
+        function checkGrammarStatementInAmbientContext(node) {
+            if (ts.isInAmbientContext(node)) {
+                // An accessors is already reported about the ambient context
+                if (ts.isAccessor(node.parent)) {
+                    return getNodeLinks(node).hasReportedStatementInAmbientContext = true;
+                }
+                // Find containing block which is either Block, ModuleBlock, SourceFile
+                var links = getNodeLinks(node);
+                if (!links.hasReportedStatementInAmbientContext && ts.isFunctionLike(node.parent)) {
+                    return getNodeLinks(node).hasReportedStatementInAmbientContext = grammarErrorOnFirstToken(node, ts.Diagnostics.An_implementation_cannot_be_declared_in_ambient_contexts);
+                }
+                // We are either parented by another statement, or some sort of block.
+                // If we're in a block, we only want to really report an error once
+                // to prevent noisiness.  So use a bit on the block to indicate if
+                // this has already been reported, and don't report if it has.
+                //
+                if (node.parent.kind === 207 /* Block */ || node.parent.kind === 234 /* ModuleBlock */ || node.parent.kind === 265 /* SourceFile */) {
+                    var links_1 = getNodeLinks(node.parent);
+                    // Check if the containing block ever report this error
+                    if (!links_1.hasReportedStatementInAmbientContext) {
+                        return links_1.hasReportedStatementInAmbientContext = grammarErrorOnFirstToken(node, ts.Diagnostics.Statements_are_not_allowed_in_ambient_contexts);
                     }
                 }
+                else {
+                    // We must be parented by a statement.  If so, there's no need
+                    // to report the error as our parent will have already done it.
+                    // Debug.assert(isStatement(node.parent));
+                }
+            }
+        }
+        function checkGrammarNumericLiteral(node) {
+            // Grammar checking
+            if (node.numericLiteralFlags & 4 /* Octal */) {
+                var diagnosticMessage = void 0;
+                if (languageVersion >= 1 /* ES5 */) {
+                    diagnosticMessage = ts.Diagnostics.Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher_Use_the_syntax_0;
+                }
+                else if (ts.isChildOfNodeWithKind(node, 173 /* LiteralType */)) {
+                    diagnosticMessage = ts.Diagnostics.Octal_literal_types_must_use_ES2015_syntax_Use_the_syntax_0;
+                }
+                else if (ts.isChildOfNodeWithKind(node, 264 /* EnumMember */)) {
+                    diagnosticMessage = ts.Diagnostics.Octal_literals_are_not_allowed_in_enums_members_initializer_Use_the_syntax_0;
+                }
+                if (diagnosticMessage) {
+                    var withMinus = ts.isPrefixUnaryExpression(node.parent) && node.parent.operator === 38 /* MinusToken */;
+                    var literal = (withMinus ? "-" : "") + "0o" + node.text;
+                    return grammarErrorOnNode(withMinus ? node.parent : node, diagnosticMessage, literal);
+                }
+            }
+        }
+        function grammarErrorAfterFirstToken(node, message, arg0, arg1, arg2) {
+            var sourceFile = ts.getSourceFileOfNode(node);
+            if (!hasParseDiagnostics(sourceFile)) {
+                var span_5 = ts.getSpanOfTokenAtPosition(sourceFile, node.pos);
+                diagnostics.add(ts.createFileDiagnostic(sourceFile, ts.textSpanEnd(span_5), /*length*/ 0, message, arg0, arg1, arg2));
+                return true;
+            }
+        }
+        function getAmbientModules() {
+            var result = [];
+            globals.forEach(function (global, sym) {
+                if (ambientModuleSymbolRegex.test(sym)) {
+                    result.push(global);
+                }
+            });
+            return result;
+        }
+        function checkGrammarImportCallExpression(node) {
+            if (modulekind === ts.ModuleKind.ES2015) {
+                return grammarErrorOnNode(node, ts.Diagnostics.Dynamic_import_cannot_be_used_when_targeting_ECMAScript_2015_modules);
+            }
+            if (node.typeArguments) {
+                return grammarErrorOnNode(node, ts.Diagnostics.Dynamic_import_cannot_have_type_arguments);
+            }
+            var nodeArguments = node.arguments;
+            if (nodeArguments.length !== 1) {
+                return grammarErrorOnNode(node, ts.Diagnostics.Dynamic_import_must_have_one_specifier_as_an_argument);
+            }
+            // see: parseArgumentOrArrayLiteralElement...we use this function which parse arguments of callExpression to parse specifier for dynamic import.
+            // parseArgumentOrArrayLiteralElement allows spread element to be in an argument list which is not allowed as specifier in dynamic import.
+            if (ts.isSpreadElement(nodeArguments[0])) {
+                return grammarErrorOnNode(nodeArguments[0], ts.Diagnostics.Specifier_of_dynamic_import_cannot_be_spread_element);
+            }
+        }
+    }
+    ts.createTypeChecker = createTypeChecker;
+    /** Like 'isDeclarationName', but returns true for LHS of `import { x as y }` or `export { x as y }`. */
+    function isDeclarationNameOrImportPropertyName(name) {
+        switch (name.parent.kind) {
+            case 242 /* ImportSpecifier */:
+            case 246 /* ExportSpecifier */:
+                return true;
+            default:
+                return ts.isDeclarationName(name);
+        }
+    }
+})(ts || (ts = {}));
+/// <reference path="sys.ts"/>
+/// <reference path="types.ts"/>
+/// <reference path="core.ts"/>
+/// <reference path="diagnosticInformationMap.generated.ts"/>
+/// <reference path="parser.ts"/>
+var ts;
+(function (ts) {
+    /* @internal */
+    ts.compileOnSaveCommandLineOption = { name: "compileOnSave", type: "boolean" };
+    /* @internal */
+    ts.optionDeclarations = [
+        // CommandLine only options
+        {
+            name: "help",
+            shortName: "h",
+            type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Command_line_Options,
+            description: ts.Diagnostics.Print_this_message,
+        },
+        {
+            name: "help",
+            shortName: "?",
+            type: "boolean"
+        },
+        {
+            name: "all",
+            type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Command_line_Options,
+            description: ts.Diagnostics.Show_all_compiler_options,
+        },
+        {
+            name: "version",
+            shortName: "v",
+            type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Command_line_Options,
+            description: ts.Diagnostics.Print_the_compiler_s_version,
+        },
+        {
+            name: "init",
+            type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Command_line_Options,
+            description: ts.Diagnostics.Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file,
+        },
+        {
+            name: "project",
+            shortName: "p",
+            type: "string",
+            isFilePath: true,
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Command_line_Options,
+            paramType: ts.Diagnostics.FILE_OR_DIRECTORY,
+            description: ts.Diagnostics.Compile_the_project_given_the_path_to_its_configuration_file_or_to_a_folder_with_a_tsconfig_json,
+        },
+        {
+            name: "pretty",
+            type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Command_line_Options,
+            description: ts.Diagnostics.Stylize_errors_and_messages_using_color_and_context_experimental
+        },
+        {
+            name: "watch",
+            shortName: "w",
+            type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Command_line_Options,
+            description: ts.Diagnostics.Watch_input_files,
+        },
+        // Basic
+        {
+            name: "target",
+            shortName: "t",
+            type: ts.createMapFromTemplate({
+                "es3": 0 /* ES3 */,
+                "es5": 1 /* ES5 */,
+                "es6": 2 /* ES2015 */,
+                "es2015": 2 /* ES2015 */,
+                "es2016": 3 /* ES2016 */,
+                "es2017": 4 /* ES2017 */,
+                "esnext": 5 /* ESNext */,
+            }),
+            paramType: ts.Diagnostics.VERSION,
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Basic_Options,
+            description: ts.Diagnostics.Specify_ECMAScript_target_version_Colon_ES3_default_ES5_ES2015_ES2016_ES2017_or_ESNEXT,
+        },
+        {
+            name: "module",
+            shortName: "m",
+            type: ts.createMapFromTemplate({
+                "none": ts.ModuleKind.None,
+                "commonjs": ts.ModuleKind.CommonJS,
+                "amd": ts.ModuleKind.AMD,
+                "system": ts.ModuleKind.System,
+                "umd": ts.ModuleKind.UMD,
+                "es6": ts.ModuleKind.ES2015,
+                "es2015": ts.ModuleKind.ES2015,
+                "esnext": ts.ModuleKind.ESNext
+            }),
+            paramType: ts.Diagnostics.KIND,
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Basic_Options,
+            description: ts.Diagnostics.Specify_module_code_generation_Colon_commonjs_amd_system_umd_es2015_or_ESNext,
+        },
+        {
+            name: "lib",
+            type: "list",
+            element: {
+                name: "lib",
+                type: ts.createMapFromTemplate({
+                    // JavaScript only
+                    "es5": "lib.es5.d.ts",
+                    "es6": "lib.es2015.d.ts",
+                    "es2015": "lib.es2015.d.ts",
+                    "es7": "lib.es2016.d.ts",
+                    "es2016": "lib.es2016.d.ts",
+                    "es2017": "lib.es2017.d.ts",
+                    "esnext": "lib.esnext.d.ts",
+                    // Host only
+                    "dom": "lib.dom.d.ts",
+                    "dom.iterable": "lib.dom.iterable.d.ts",
+                    "webworker": "lib.webworker.d.ts",
+                    "scripthost": "lib.scripthost.d.ts",
+                    // ES2015 Or ESNext By-feature options
+                    "es2015.core": "lib.es2015.core.d.ts",
+                    "es2015.collection": "lib.es2015.collection.d.ts",
+                    "es2015.generator": "lib.es2015.generator.d.ts",
+                    "es2015.iterable": "lib.es2015.iterable.d.ts",
+                    "es2015.promise": "lib.es2015.promise.d.ts",
+                    "es2015.proxy": "lib.es2015.proxy.d.ts",
+                    "es2015.reflect": "lib.es2015.reflect.d.ts",
+                    "es2015.symbol": "lib.es2015.symbol.d.ts",
+                    "es2015.symbol.wellknown": "lib.es2015.symbol.wellknown.d.ts",
+                    "es2016.array.include": "lib.es2016.array.include.d.ts",
+                    "es2017.object": "lib.es2017.object.d.ts",
+                    "es2017.sharedmemory": "lib.es2017.sharedmemory.d.ts",
+                    "es2017.string": "lib.es2017.string.d.ts",
+                    "es2017.intl": "lib.es2017.intl.d.ts",
+                    "esnext.asynciterable": "lib.esnext.asynciterable.d.ts",
+                }),
+            },
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Basic_Options,
+            description: ts.Diagnostics.Specify_library_files_to_be_included_in_the_compilation_Colon
+        },
+        {
+            name: "allowJs",
+            type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Basic_Options,
+            description: ts.Diagnostics.Allow_javascript_files_to_be_compiled
+        },
+        {
+            name: "checkJs",
+            type: "boolean",
+            category: ts.Diagnostics.Basic_Options,
+            description: ts.Diagnostics.Report_errors_in_js_files
+        },
+        {
+            name: "jsx",
+            type: ts.createMapFromTemplate({
+                "preserve": 1 /* Preserve */,
+                "react-native": 3 /* ReactNative */,
+                "react": 2 /* React */
+            }),
+            paramType: ts.Diagnostics.KIND,
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Basic_Options,
+            description: ts.Diagnostics.Specify_JSX_code_generation_Colon_preserve_react_native_or_react,
+        },
+        {
+            name: "declaration",
+            shortName: "d",
+            type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Basic_Options,
+            description: ts.Diagnostics.Generates_corresponding_d_ts_file,
+        },
+        {
+            name: "sourceMap",
+            type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Basic_Options,
+            description: ts.Diagnostics.Generates_corresponding_map_file,
+        },
+        {
+            name: "outFile",
+            type: "string",
+            isFilePath: true,
+            paramType: ts.Diagnostics.FILE,
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Basic_Options,
+            description: ts.Diagnostics.Concatenate_and_emit_output_to_single_file,
+        },
+        {
+            name: "outDir",
+            type: "string",
+            isFilePath: true,
+            paramType: ts.Diagnostics.DIRECTORY,
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Basic_Options,
+            description: ts.Diagnostics.Redirect_output_structure_to_the_directory,
+        },
+        {
+            name: "rootDir",
+            type: "string",
+            isFilePath: true,
+            paramType: ts.Diagnostics.LOCATION,
+            category: ts.Diagnostics.Basic_Options,
+            description: ts.Diagnostics.Specify_the_root_directory_of_input_files_Use_to_control_the_output_directory_structure_with_outDir,
+        },
+        {
+            name: "removeComments",
+            type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Basic_Options,
+            description: ts.Diagnostics.Do_not_emit_comments_to_output,
+        },
+        {
+            name: "noEmit",
+            type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Basic_Options,
+            description: ts.Diagnostics.Do_not_emit_outputs,
+        },
+        {
+            name: "importHelpers",
+            type: "boolean",
+            category: ts.Diagnostics.Basic_Options,
+            description: ts.Diagnostics.Import_emit_helpers_from_tslib
+        },
+        {
+            name: "downlevelIteration",
+            type: "boolean",
+            category: ts.Diagnostics.Basic_Options,
+            description: ts.Diagnostics.Provide_full_support_for_iterables_in_for_of_spread_and_destructuring_when_targeting_ES5_or_ES3
+        },
+        {
+            name: "isolatedModules",
+            type: "boolean",
+            category: ts.Diagnostics.Basic_Options,
+            description: ts.Diagnostics.Transpile_each_file_as_a_separate_module_similar_to_ts_transpileModule
+        },
+        // Strict Type Checks
+        {
+            name: "strict",
+            type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Strict_Type_Checking_Options,
+            description: ts.Diagnostics.Enable_all_strict_type_checking_options
+        },
+        {
+            name: "noImplicitAny",
+            type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Strict_Type_Checking_Options,
+            description: ts.Diagnostics.Raise_error_on_expressions_and_declarations_with_an_implied_any_type,
+        },
+        {
+            name: "strictNullChecks",
+            type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Strict_Type_Checking_Options,
+            description: ts.Diagnostics.Enable_strict_null_checks
+        },
+        {
+            name: "noImplicitThis",
+            type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Strict_Type_Checking_Options,
+            description: ts.Diagnostics.Raise_error_on_this_expressions_with_an_implied_any_type,
+        },
+        {
+            name: "alwaysStrict",
+            type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Strict_Type_Checking_Options,
+            description: ts.Diagnostics.Parse_in_strict_mode_and_emit_use_strict_for_each_source_file
+        },
+        // Additional Checks
+        {
+            name: "noUnusedLocals",
+            type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Additional_Checks,
+            description: ts.Diagnostics.Report_errors_on_unused_locals,
+        },
+        {
+            name: "noUnusedParameters",
+            type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Additional_Checks,
+            description: ts.Diagnostics.Report_errors_on_unused_parameters,
+        },
+        {
+            name: "noImplicitReturns",
+            type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Additional_Checks,
+            description: ts.Diagnostics.Report_error_when_not_all_code_paths_in_function_return_a_value
+        },
+        {
+            name: "noFallthroughCasesInSwitch",
+            type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Additional_Checks,
+            description: ts.Diagnostics.Report_errors_for_fallthrough_cases_in_switch_statement
+        },
+        // Module Resolution
+        {
+            name: "moduleResolution",
+            type: ts.createMapFromTemplate({
+                "node": ts.ModuleResolutionKind.NodeJs,
+                "classic": ts.ModuleResolutionKind.Classic,
+            }),
+            paramType: ts.Diagnostics.STRATEGY,
+            category: ts.Diagnostics.Module_Resolution_Options,
+            description: ts.Diagnostics.Specify_module_resolution_strategy_Colon_node_Node_js_or_classic_TypeScript_pre_1_6,
+        },
+        {
+            name: "baseUrl",
+            type: "string",
+            isFilePath: true,
+            category: ts.Diagnostics.Module_Resolution_Options,
+            description: ts.Diagnostics.Base_directory_to_resolve_non_absolute_module_names
+        },
+        {
+            // this option can only be specified in tsconfig.json
+            // use type = object to copy the value as-is
+            name: "paths",
+            type: "object",
+            isTSConfigOnly: true,
+            category: ts.Diagnostics.Module_Resolution_Options,
+            description: ts.Diagnostics.A_series_of_entries_which_re_map_imports_to_lookup_locations_relative_to_the_baseUrl
+        },
+        {
+            // this option can only be specified in tsconfig.json
+            // use type = object to copy the value as-is
+            name: "rootDirs",
+            type: "list",
+            isTSConfigOnly: true,
+            element: {
+                name: "rootDirs",
+                type: "string",
+                isFilePath: true
+            },
+            category: ts.Diagnostics.Module_Resolution_Options,
+            description: ts.Diagnostics.List_of_root_folders_whose_combined_content_represents_the_structure_of_the_project_at_runtime
+        },
+        {
+            name: "typeRoots",
+            type: "list",
+            element: {
+                name: "typeRoots",
+                type: "string",
+                isFilePath: true
+            },
+            category: ts.Diagnostics.Module_Resolution_Options,
+            description: ts.Diagnostics.List_of_folders_to_include_type_definitions_from
+        },
+        {
+            name: "types",
+            type: "list",
+            element: {
+                name: "types",
+                type: "string"
+            },
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Module_Resolution_Options,
+            description: ts.Diagnostics.Type_declaration_files_to_be_included_in_compilation
+        },
+        {
+            name: "allowSyntheticDefaultImports",
+            type: "boolean",
+            category: ts.Diagnostics.Module_Resolution_Options,
+            description: ts.Diagnostics.Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typechecking
+        },
+        // Source Maps
+        {
+            name: "sourceRoot",
+            type: "string",
+            isFilePath: true,
+            paramType: ts.Diagnostics.LOCATION,
+            category: ts.Diagnostics.Source_Map_Options,
+            description: ts.Diagnostics.Specify_the_location_where_debugger_should_locate_TypeScript_files_instead_of_source_locations,
+        },
+        {
+            name: "mapRoot",
+            type: "string",
+            isFilePath: true,
+            paramType: ts.Diagnostics.LOCATION,
+            category: ts.Diagnostics.Source_Map_Options,
+            description: ts.Diagnostics.Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations,
+        },
+        {
+            name: "inlineSourceMap",
+            type: "boolean",
+            category: ts.Diagnostics.Source_Map_Options,
+            description: ts.Diagnostics.Emit_a_single_file_with_source_maps_instead_of_having_a_separate_file
+        },
+        {
+            name: "inlineSources",
+            type: "boolean",
+            category: ts.Diagnostics.Source_Map_Options,
+            description: ts.Diagnostics.Emit_the_source_alongside_the_sourcemaps_within_a_single_file_requires_inlineSourceMap_or_sourceMap_to_be_set
+        },
+        // Experimental
+        {
+            name: "experimentalDecorators",
+            type: "boolean",
+            category: ts.Diagnostics.Experimental_Options,
+            description: ts.Diagnostics.Enables_experimental_support_for_ES7_decorators
+        },
+        {
+            name: "emitDecoratorMetadata",
+            type: "boolean",
+            category: ts.Diagnostics.Experimental_Options,
+            description: ts.Diagnostics.Enables_experimental_support_for_emitting_type_metadata_for_decorators
+        },
+        // Advanced
+        {
+            name: "jsxFactory",
+            type: "string",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Specify_the_JSX_factory_function_to_use_when_targeting_react_JSX_emit_e_g_React_createElement_or_h
+        },
+        {
+            name: "diagnostics",
+            type: "boolean",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Show_diagnostic_information
+        },
+        {
+            name: "extendedDiagnostics",
+            type: "boolean",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Show_verbose_diagnostic_information
+        },
+        {
+            name: "traceResolution",
+            type: "boolean",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Enable_tracing_of_the_name_resolution_process
+        },
+        {
+            name: "listFiles",
+            type: "boolean",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Print_names_of_files_part_of_the_compilation
+        },
+        {
+            name: "listEmittedFiles",
+            type: "boolean",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Print_names_of_generated_files_part_of_the_compilation
+        },
+        {
+            name: "out",
+            type: "string",
+            isFilePath: false,
+            // for correct behaviour, please use outFile
+            category: ts.Diagnostics.Advanced_Options,
+            paramType: ts.Diagnostics.FILE,
+            description: ts.Diagnostics.Deprecated_Use_outFile_instead_Concatenate_and_emit_output_to_single_file,
+        },
+        {
+            name: "reactNamespace",
+            type: "string",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Deprecated_Use_jsxFactory_instead_Specify_the_object_invoked_for_createElement_when_targeting_react_JSX_emit
+        },
+        {
+            name: "skipDefaultLibCheck",
+            type: "boolean",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Deprecated_Use_skipLibCheck_instead_Skip_type_checking_of_default_library_declaration_files
+        },
+        {
+            name: "charset",
+            type: "string",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.The_character_set_of_the_input_files
+        },
+        {
+            name: "emitBOM",
+            type: "boolean",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Emit_a_UTF_8_Byte_Order_Mark_BOM_in_the_beginning_of_output_files
+        },
+        {
+            name: "locale",
+            type: "string",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.The_locale_used_when_displaying_messages_to_the_user_e_g_en_us
+        },
+        {
+            name: "newLine",
+            type: ts.createMapFromTemplate({
+                "crlf": 0 /* CarriageReturnLineFeed */,
+                "lf": 1 /* LineFeed */
+            }),
+            paramType: ts.Diagnostics.NEWLINE,
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Specify_the_end_of_line_sequence_to_be_used_when_emitting_files_Colon_CRLF_dos_or_LF_unix,
+        },
+        {
+            name: "noErrorTruncation",
+            type: "boolean",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Do_not_truncate_error_messages
+        },
+        {
+            name: "noLib",
+            type: "boolean",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Do_not_include_the_default_library_file_lib_d_ts
+        },
+        {
+            name: "noResolve",
+            type: "boolean",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Do_not_add_triple_slash_references_or_imported_modules_to_the_list_of_compiled_files
+        },
+        {
+            name: "stripInternal",
+            type: "boolean",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Do_not_emit_declarations_for_code_that_has_an_internal_annotation,
+        },
+        {
+            name: "disableSizeLimit",
+            type: "boolean",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Disable_size_limitations_on_JavaScript_projects
+        },
+        {
+            name: "noImplicitUseStrict",
+            type: "boolean",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Do_not_emit_use_strict_directives_in_module_output
+        },
+        {
+            name: "noEmitHelpers",
+            type: "boolean",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Do_not_generate_custom_helper_functions_like_extends_in_compiled_output
+        },
+        {
+            name: "noEmitOnError",
+            type: "boolean",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Do_not_emit_outputs_if_any_errors_were_reported,
+        },
+        {
+            name: "preserveConstEnums",
+            type: "boolean",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Do_not_erase_const_enum_declarations_in_generated_code
+        },
+        {
+            name: "declarationDir",
+            type: "string",
+            isFilePath: true,
+            paramType: ts.Diagnostics.DIRECTORY,
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Output_directory_for_generated_declaration_files
+        },
+        {
+            name: "skipLibCheck",
+            type: "boolean",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Skip_type_checking_of_declaration_files,
+        },
+        {
+            name: "allowUnusedLabels",
+            type: "boolean",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Do_not_report_errors_on_unused_labels
+        },
+        {
+            name: "allowUnreachableCode",
+            type: "boolean",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Do_not_report_errors_on_unreachable_code
+        },
+        {
+            name: "suppressExcessPropertyErrors",
+            type: "boolean",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Suppress_excess_property_checks_for_object_literals,
+        },
+        {
+            name: "suppressImplicitAnyIndexErrors",
+            type: "boolean",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Suppress_noImplicitAny_errors_for_indexing_objects_lacking_index_signatures,
+        },
+        {
+            name: "forceConsistentCasingInFileNames",
+            type: "boolean",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Disallow_inconsistently_cased_references_to_the_same_file
+        },
+        {
+            name: "maxNodeModuleJsDepth",
+            type: "number",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.The_maximum_dependency_depth_to_search_under_node_modules_and_load_JavaScript_files
+        },
+        {
+            name: "noStrictGenericChecks",
+            type: "boolean",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Disable_strict_checking_of_generic_signatures_in_function_types,
+        },
+        {
+            // A list of plugins to load in the language service
+            name: "plugins",
+            type: "list",
+            isTSConfigOnly: true,
+            element: {
+                name: "plugin",
+                type: "object"
+            },
+            description: ts.Diagnostics.List_of_language_service_plugins
+        }
+    ];
+    /* @internal */
+    ts.typeAcquisitionDeclarations = [
+        {
+            /* @deprecated typingOptions.enableAutoDiscovery
+             * Use typeAcquisition.enable instead.
+             */
+            name: "enableAutoDiscovery",
+            type: "boolean",
+        },
+        {
+            name: "enable",
+            type: "boolean",
+        },
+        {
+            name: "include",
+            type: "list",
+            element: {
+                name: "include",
+                type: "string"
             }
-            if (node.body) {
-                checkSourceElement(node.body);
-                if (!ts.isGlobalScopeAugmentation(node)) {
-                    registerForUnusedIdentifiersCheck(node);
-                }
+        },
+        {
+            name: "exclude",
+            type: "list",
+            element: {
+                name: "exclude",
+                type: "string"
             }
         }
-        function checkModuleAugmentationElement(node, isGlobalAugmentation) {
-            switch (node.kind) {
-                case 200 /* VariableStatement */:
-                    // error each individual name in variable statement instead of marking the entire variable statement
-                    for (var _i = 0, _a = node.declarationList.declarations; _i < _a.length; _i++) {
-                        var decl = _a[_i];
-                        checkModuleAugmentationElement(decl, isGlobalAugmentation);
-                    }
-                    break;
-                case 235 /* ExportAssignment */:
-                case 236 /* ExportDeclaration */:
-                    grammarErrorOnFirstToken(node, ts.Diagnostics.Exports_and_export_assignments_are_not_permitted_in_module_augmentations);
-                    break;
-                case 229 /* ImportEqualsDeclaration */:
-                case 230 /* ImportDeclaration */:
-                    grammarErrorOnFirstToken(node, ts.Diagnostics.Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_module);
-                    break;
-                case 169 /* BindingElement */:
-                case 218 /* VariableDeclaration */:
-                    var name_22 = node.name;
-                    if (ts.isBindingPattern(name_22)) {
-                        for (var _b = 0, _c = name_22.elements; _b < _c.length; _b++) {
-                            var el = _c[_b];
-                            // mark individual names in binding pattern
-                            checkModuleAugmentationElement(el, isGlobalAugmentation);
-                        }
-                        break;
-                    }
-                // fallthrough
-                case 221 /* ClassDeclaration */:
-                case 224 /* EnumDeclaration */:
-                case 220 /* FunctionDeclaration */:
-                case 222 /* InterfaceDeclaration */:
-                case 225 /* ModuleDeclaration */:
-                case 223 /* TypeAliasDeclaration */:
-                    if (isGlobalAugmentation) {
-                        return;
-                    }
-                    var symbol = getSymbolOfNode(node);
-                    if (symbol) {
-                        // module augmentations cannot introduce new names on the top level scope of the module
-                        // this is done it two steps
-                        // 1. quick check - if symbol for node is not merged - this is local symbol to this augmentation - report error
-                        // 2. main check - report error if value declaration of the parent symbol is module augmentation)
-                        var reportError = !(symbol.flags & 33554432 /* Merged */);
-                        if (!reportError) {
-                            // symbol should not originate in augmentation
-                            reportError = ts.isExternalModuleAugmentation(symbol.parent.declarations[0]);
-                        }
-                    }
-                    break;
-            }
+    ];
+    /* @internal */
+    ts.defaultInitCompilerOptions = {
+        module: ts.ModuleKind.CommonJS,
+        target: 1 /* ES5 */,
+        strict: true
+    };
+    var optionNameMapCache;
+    /* @internal */
+    function convertEnableAutoDiscoveryToEnable(typeAcquisition) {
+        // Convert deprecated typingOptions.enableAutoDiscovery to typeAcquisition.enable
+        if (typeAcquisition && typeAcquisition.enableAutoDiscovery !== undefined && typeAcquisition.enable === undefined) {
+            var result = {
+                enable: typeAcquisition.enableAutoDiscovery,
+                include: typeAcquisition.include || [],
+                exclude: typeAcquisition.exclude || []
+            };
+            return result;
         }
-        function getFirstIdentifier(node) {
-            switch (node.kind) {
-                case 69 /* Identifier */:
-                    return node;
-                case 139 /* QualifiedName */:
-                    do {
-                        node = node.left;
-                    } while (node.kind !== 69 /* Identifier */);
-                    return node;
-                case 172 /* PropertyAccessExpression */:
-                    do {
-                        node = node.expression;
-                    } while (node.kind !== 69 /* Identifier */);
-                    return node;
-            }
+        return typeAcquisition;
+    }
+    ts.convertEnableAutoDiscoveryToEnable = convertEnableAutoDiscoveryToEnable;
+    function getOptionNameMap() {
+        if (optionNameMapCache) {
+            return optionNameMapCache;
         }
-        function checkExternalImportOrExportDeclaration(node) {
-            var moduleName = ts.getExternalModuleName(node);
-            if (!ts.nodeIsMissing(moduleName) && moduleName.kind !== 9 /* StringLiteral */) {
-                error(moduleName, ts.Diagnostics.String_literal_expected);
-                return false;
-            }
-            var inAmbientExternalModule = node.parent.kind === 226 /* ModuleBlock */ && ts.isAmbientModule(node.parent.parent);
-            if (node.parent.kind !== 256 /* SourceFile */ && !inAmbientExternalModule) {
-                error(moduleName, node.kind === 236 /* ExportDeclaration */ ?
-                    ts.Diagnostics.Export_declarations_are_not_permitted_in_a_namespace :
-                    ts.Diagnostics.Import_declarations_in_a_namespace_cannot_reference_a_module);
-                return false;
-            }
-            if (inAmbientExternalModule && ts.isExternalModuleNameRelative(moduleName.text)) {
-                // we have already reported errors on top level imports\exports in external module augmentations in checkModuleDeclaration
-                // no need to do this again.
-                if (!isTopLevelInExternalModuleAugmentation(node)) {
-                    // TypeScript 1.0 spec (April 2013): 12.1.6
-                    // An ExternalImportDeclaration in an AmbientExternalModuleDeclaration may reference
-                    // other external modules only through top - level external module names.
-                    // Relative external module names are not permitted.
-                    error(node, ts.Diagnostics.Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relative_module_name);
-                    return false;
-                }
+        var optionNameMap = ts.createMap();
+        var shortOptionNames = ts.createMap();
+        ts.forEach(ts.optionDeclarations, function (option) {
+            optionNameMap.set(option.name.toLowerCase(), option);
+            if (option.shortName) {
+                shortOptionNames.set(option.shortName, option.name);
             }
-            return true;
+        });
+        optionNameMapCache = { optionNameMap: optionNameMap, shortOptionNames: shortOptionNames };
+        return optionNameMapCache;
+    }
+    /* @internal */
+    function createCompilerDiagnosticForInvalidCustomType(opt) {
+        return createDiagnosticForInvalidCustomType(opt, ts.createCompilerDiagnostic);
+    }
+    ts.createCompilerDiagnosticForInvalidCustomType = createCompilerDiagnosticForInvalidCustomType;
+    function createDiagnosticForInvalidCustomType(opt, createDiagnostic) {
+        var namesOfType = ts.arrayFrom(opt.type.keys()).map(function (key) { return "'" + key + "'"; }).join(", ");
+        return createDiagnostic(ts.Diagnostics.Argument_for_0_option_must_be_Colon_1, "--" + opt.name, namesOfType);
+    }
+    /* @internal */
+    function parseCustomTypeOption(opt, value, errors) {
+        return convertJsonOptionOfCustomType(opt, trimString(value || ""), errors);
+    }
+    ts.parseCustomTypeOption = parseCustomTypeOption;
+    /* @internal */
+    function parseListTypeOption(opt, value, errors) {
+        if (value === void 0) { value = ""; }
+        value = trimString(value);
+        if (ts.startsWith(value, "-")) {
+            return undefined;
         }
-        function checkAliasSymbol(node) {
-            var symbol = getSymbolOfNode(node);
-            var target = resolveAlias(symbol);
-            if (target !== unknownSymbol) {
-                // For external modules symbol represent local symbol for an alias.
-                // This local symbol will merge any other local declarations (excluding other aliases)
-                // and symbol.flags will contains combined representation for all merged declaration.
-                // Based on symbol.flags we can compute a set of excluded meanings (meaning that resolved alias should not have,
-                // otherwise it will conflict with some local declaration). Note that in addition to normal flags we include matching SymbolFlags.Export*
-                // in order to prevent collisions with declarations that were exported from the current module (they still contribute to local names).
-                var excludedMeanings = (symbol.flags & (107455 /* Value */ | 1048576 /* ExportValue */) ? 107455 /* Value */ : 0) |
-                    (symbol.flags & 793064 /* Type */ ? 793064 /* Type */ : 0) |
-                    (symbol.flags & 1920 /* Namespace */ ? 1920 /* Namespace */ : 0);
-                if (target.flags & excludedMeanings) {
-                    var message = node.kind === 238 /* ExportSpecifier */ ?
-                        ts.Diagnostics.Export_declaration_conflicts_with_exported_declaration_of_0 :
-                        ts.Diagnostics.Import_declaration_conflicts_with_local_declaration_of_0;
-                    error(node, message, symbolToString(symbol));
-                }
-            }
+        if (value === "") {
+            return [];
         }
-        function checkImportBinding(node) {
-            checkCollisionWithCapturedThisVariable(node, node.name);
-            checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
-            checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
-            checkAliasSymbol(node);
+        var values = value.split(",");
+        switch (opt.element.type) {
+            case "number":
+                return ts.map(values, parseInt);
+            case "string":
+                return ts.map(values, function (v) { return v || ""; });
+            default:
+                return ts.filter(ts.map(values, function (v) { return parseCustomTypeOption(opt.element, v, errors); }), function (v) { return !!v; });
         }
-        function checkImportDeclaration(node) {
-            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_import_declaration_can_only_be_used_in_a_namespace_or_module)) {
-                // If we hit an import declaration in an illegal context, just bail out to avoid cascading errors.
-                return;
-            }
-            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && ts.getModifierFlags(node) !== 0) {
-                grammarErrorOnFirstToken(node, ts.Diagnostics.An_import_declaration_cannot_have_modifiers);
-            }
-            if (checkExternalImportOrExportDeclaration(node)) {
-                var importClause = node.importClause;
-                if (importClause) {
-                    if (importClause.name) {
-                        checkImportBinding(importClause);
-                    }
-                    if (importClause.namedBindings) {
-                        if (importClause.namedBindings.kind === 232 /* NamespaceImport */) {
-                            checkImportBinding(importClause.namedBindings);
+    }
+    ts.parseListTypeOption = parseListTypeOption;
+    function parseCommandLine(commandLine, readFile) {
+        var options = {};
+        var fileNames = [];
+        var errors = [];
+        parseStrings(commandLine);
+        return {
+            options: options,
+            fileNames: fileNames,
+            errors: errors
+        };
+        function parseStrings(args) {
+            var i = 0;
+            while (i < args.length) {
+                var s = args[i];
+                i++;
+                if (s.charCodeAt(0) === 64 /* at */) {
+                    parseResponseFile(s.slice(1));
+                }
+                else if (s.charCodeAt(0) === 45 /* minus */) {
+                    var opt = getOptionFromName(s.slice(s.charCodeAt(1) === 45 /* minus */ ? 2 : 1), /*allowShort*/ true);
+                    if (opt) {
+                        if (opt.isTSConfigOnly) {
+                            errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_can_only_be_specified_in_tsconfig_json_file, opt.name));
                         }
                         else {
-                            ts.forEach(importClause.namedBindings.elements, checkImportBinding);
-                        }
-                    }
-                }
-            }
-        }
-        function checkImportEqualsDeclaration(node) {
-            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_import_declaration_can_only_be_used_in_a_namespace_or_module)) {
-                // If we hit an import declaration in an illegal context, just bail out to avoid cascading errors.
-                return;
-            }
-            checkGrammarDecorators(node) || checkGrammarModifiers(node);
-            if (ts.isInternalModuleImportEqualsDeclaration(node) || checkExternalImportOrExportDeclaration(node)) {
-                checkImportBinding(node);
-                if (ts.getModifierFlags(node) & 1 /* Export */) {
-                    markExportAsReferenced(node);
-                }
-                if (ts.isInternalModuleImportEqualsDeclaration(node)) {
-                    var target = resolveAlias(getSymbolOfNode(node));
-                    if (target !== unknownSymbol) {
-                        if (target.flags & 107455 /* Value */) {
-                            // Target is a value symbol, check that it is not hidden by a local declaration with the same name
-                            var moduleName = getFirstIdentifier(node.moduleReference);
-                            if (!(resolveEntityName(moduleName, 107455 /* Value */ | 1920 /* Namespace */).flags & 1920 /* Namespace */)) {
-                                error(moduleName, ts.Diagnostics.Module_0_is_hidden_by_a_local_declaration_with_the_same_name, ts.declarationNameToString(moduleName));
+                            // Check to see if no argument was provided (e.g. "--locale" is the last command-line argument).
+                            if (!args[i] && opt.type !== "boolean") {
+                                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_expects_an_argument, opt.name));
                             }
-                        }
-                        if (target.flags & 793064 /* Type */) {
-                            checkTypeNameIsReserved(node.name, ts.Diagnostics.Import_name_cannot_be_0);
-                        }
-                    }
-                }
-                else {
-                    if (modulekind === ts.ModuleKind.ES6 && !ts.isInAmbientContext(node)) {
-                        // Import equals declaration is deprecated in es6 or above
-                        grammarErrorOnNode(node, ts.Diagnostics.Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead);
-                    }
-                }
-            }
-        }
-        function checkExportDeclaration(node) {
-            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_export_declaration_can_only_be_used_in_a_module)) {
-                // If we hit an export in an illegal context, just bail out to avoid cascading errors.
-                return;
-            }
-            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && ts.getModifierFlags(node) !== 0) {
-                grammarErrorOnFirstToken(node, ts.Diagnostics.An_export_declaration_cannot_have_modifiers);
-            }
-            if (!node.moduleSpecifier || checkExternalImportOrExportDeclaration(node)) {
-                if (node.exportClause) {
-                    // export { x, y }
-                    // export { x, y } from "foo"
-                    ts.forEach(node.exportClause.elements, checkExportSpecifier);
-                    var inAmbientExternalModule = node.parent.kind === 226 /* ModuleBlock */ && ts.isAmbientModule(node.parent.parent);
-                    if (node.parent.kind !== 256 /* SourceFile */ && !inAmbientExternalModule) {
-                        error(node, ts.Diagnostics.Export_declarations_are_not_permitted_in_a_namespace);
-                    }
-                }
-                else {
-                    // export * from "foo"
-                    var moduleSymbol = resolveExternalModuleName(node, node.moduleSpecifier);
-                    if (moduleSymbol && hasExportAssignmentSymbol(moduleSymbol)) {
-                        error(node.moduleSpecifier, ts.Diagnostics.Module_0_uses_export_and_cannot_be_used_with_export_Asterisk, symbolToString(moduleSymbol));
-                    }
-                }
-            }
-        }
-        function checkGrammarModuleElementContext(node, errorMessage) {
-            var isInAppropriateContext = node.parent.kind === 256 /* SourceFile */ || node.parent.kind === 226 /* ModuleBlock */ || node.parent.kind === 225 /* ModuleDeclaration */;
-            if (!isInAppropriateContext) {
-                grammarErrorOnFirstToken(node, errorMessage);
-            }
-            return !isInAppropriateContext;
-        }
-        function checkExportSpecifier(node) {
-            checkAliasSymbol(node);
-            if (!node.parent.parent.moduleSpecifier) {
-                var exportedName = node.propertyName || node.name;
-                // find immediate value referenced by exported name (SymbolFlags.Alias is set so we don't chase down aliases)
-                var symbol = resolveName(exportedName, exportedName.text, 107455 /* Value */ | 793064 /* Type */ | 1920 /* Namespace */ | 8388608 /* Alias */, 
-                /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined);
-                if (symbol && (symbol === undefinedSymbol || isGlobalSourceFile(getDeclarationContainer(symbol.declarations[0])))) {
-                    error(exportedName, ts.Diagnostics.Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module, exportedName.text);
-                }
-                else {
-                    markExportAsReferenced(node);
-                }
-            }
-        }
-        function checkExportAssignment(node) {
-            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_export_assignment_can_only_be_used_in_a_module)) {
-                // If we hit an export assignment in an illegal context, just bail out to avoid cascading errors.
-                return;
-            }
-            var container = node.parent.kind === 256 /* SourceFile */ ? node.parent : node.parent.parent;
-            if (container.kind === 225 /* ModuleDeclaration */ && !ts.isAmbientModule(container)) {
-                error(node, ts.Diagnostics.An_export_assignment_cannot_be_used_in_a_namespace);
-                return;
-            }
-            // Grammar checking
-            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && ts.getModifierFlags(node) !== 0) {
-                grammarErrorOnFirstToken(node, ts.Diagnostics.An_export_assignment_cannot_have_modifiers);
-            }
-            if (node.expression.kind === 69 /* Identifier */) {
-                markExportAsReferenced(node);
-            }
-            else {
-                checkExpressionCached(node.expression);
-            }
-            checkExternalModuleExports(container);
-            if (node.isExportEquals && !ts.isInAmbientContext(node)) {
-                if (modulekind === ts.ModuleKind.ES6) {
-                    // export assignment is not supported in es6 modules
-                    grammarErrorOnNode(node, ts.Diagnostics.Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_or_another_module_format_instead);
-                }
-                else if (modulekind === ts.ModuleKind.System) {
-                    // system modules does not support export assignment
-                    grammarErrorOnNode(node, ts.Diagnostics.Export_assignment_is_not_supported_when_module_flag_is_system);
-                }
-            }
-        }
-        function hasExportedMembers(moduleSymbol) {
-            for (var id in moduleSymbol.exports) {
-                if (id !== "export=") {
-                    return true;
-                }
-            }
-            return false;
-        }
-        function checkExternalModuleExports(node) {
-            var moduleSymbol = getSymbolOfNode(node);
-            var links = getSymbolLinks(moduleSymbol);
-            if (!links.exportsChecked) {
-                var exportEqualsSymbol = moduleSymbol.exports["export="];
-                if (exportEqualsSymbol && hasExportedMembers(moduleSymbol)) {
-                    var declaration = getDeclarationOfAliasSymbol(exportEqualsSymbol) || exportEqualsSymbol.valueDeclaration;
-                    if (!isTopLevelInExternalModuleAugmentation(declaration)) {
-                        error(declaration, ts.Diagnostics.An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements);
-                    }
-                }
-                // Checks for export * conflicts
-                var exports = getExportsOfModule(moduleSymbol);
-                for (var id in exports) {
-                    if (id === "__export") {
-                        continue;
-                    }
-                    var _a = exports[id], declarations = _a.declarations, flags = _a.flags;
-                    // ECMA262: 15.2.1.1 It is a Syntax Error if the ExportedNames of ModuleItemList contains any duplicate entries.
-                    // (TS Exceptions: namespaces, function overloads, enums, and interfaces)
-                    if (flags & (1920 /* Namespace */ | 64 /* Interface */ | 384 /* Enum */)) {
-                        continue;
-                    }
-                    var exportedDeclarationsCount = ts.countWhere(declarations, isNotOverload);
-                    if (flags & 524288 /* TypeAlias */ && exportedDeclarationsCount <= 2) {
-                        // it is legal to merge type alias with other values
-                        // so count should be either 1 (just type alias) or 2 (type alias + merged value)
-                        continue;
-                    }
-                    if (exportedDeclarationsCount > 1) {
-                        for (var _i = 0, declarations_6 = declarations; _i < declarations_6.length; _i++) {
-                            var declaration = declarations_6[_i];
-                            if (isNotOverload(declaration)) {
-                                diagnostics.add(ts.createDiagnosticForNode(declaration, ts.Diagnostics.Cannot_redeclare_exported_variable_0, id));
+                            switch (opt.type) {
+                                case "number":
+                                    options[opt.name] = parseInt(args[i]);
+                                    i++;
+                                    break;
+                                case "boolean":
+                                    // boolean flag has optional value true, false, others
+                                    var optValue = args[i];
+                                    options[opt.name] = optValue !== "false";
+                                    // consume next argument as boolean flag value
+                                    if (optValue === "false" || optValue === "true") {
+                                        i++;
+                                    }
+                                    break;
+                                case "string":
+                                    options[opt.name] = args[i] || "";
+                                    i++;
+                                    break;
+                                case "list":
+                                    var result = parseListTypeOption(opt, args[i], errors);
+                                    options[opt.name] = result || [];
+                                    if (result) {
+                                        i++;
+                                    }
+                                    break;
+                                // If not a primitive, the possible types are specified in what is effectively a map of options.
+                                default:
+                                    options[opt.name] = parseCustomTypeOption(opt, args[i], errors);
+                                    i++;
+                                    break;
                             }
-                        }
-                    }
-                }
-                links.exportsChecked = true;
-            }
-            function isNotOverload(declaration) {
-                return declaration.kind !== 220 /* FunctionDeclaration */ || !!declaration.body;
-            }
-        }
-        function checkSourceElement(node) {
-            if (!node) {
-                return;
-            }
-            var kind = node.kind;
-            if (cancellationToken) {
-                // Only bother checking on a few construct kinds.  We don't want to be excessively
-                // hitting the cancellation token on every node we check.
-                switch (kind) {
-                    case 225 /* ModuleDeclaration */:
-                    case 221 /* ClassDeclaration */:
-                    case 222 /* InterfaceDeclaration */:
-                    case 220 /* FunctionDeclaration */:
-                        cancellationToken.throwIfCancellationRequested();
-                }
-            }
-            switch (kind) {
-                case 141 /* TypeParameter */:
-                    return checkTypeParameter(node);
-                case 142 /* Parameter */:
-                    return checkParameter(node);
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
-                    return checkPropertyDeclaration(node);
-                case 156 /* FunctionType */:
-                case 157 /* ConstructorType */:
-                case 151 /* CallSignature */:
-                case 152 /* ConstructSignature */:
-                    return checkSignatureDeclaration(node);
-                case 153 /* IndexSignature */:
-                    return checkSignatureDeclaration(node);
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                    return checkMethodDeclaration(node);
-                case 148 /* Constructor */:
-                    return checkConstructorDeclaration(node);
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                    return checkAccessorDeclaration(node);
-                case 155 /* TypeReference */:
-                    return checkTypeReferenceNode(node);
-                case 154 /* TypePredicate */:
-                    return checkTypePredicate(node);
-                case 158 /* TypeQuery */:
-                    return checkTypeQuery(node);
-                case 159 /* TypeLiteral */:
-                    return checkTypeLiteral(node);
-                case 160 /* ArrayType */:
-                    return checkArrayType(node);
-                case 161 /* TupleType */:
-                    return checkTupleType(node);
-                case 162 /* UnionType */:
-                case 163 /* IntersectionType */:
-                    return checkUnionOrIntersectionType(node);
-                case 164 /* ParenthesizedType */:
-                    return checkSourceElement(node.type);
-                case 220 /* FunctionDeclaration */:
-                    return checkFunctionDeclaration(node);
-                case 199 /* Block */:
-                case 226 /* ModuleBlock */:
-                    return checkBlock(node);
-                case 200 /* VariableStatement */:
-                    return checkVariableStatement(node);
-                case 202 /* ExpressionStatement */:
-                    return checkExpressionStatement(node);
-                case 203 /* IfStatement */:
-                    return checkIfStatement(node);
-                case 204 /* DoStatement */:
-                    return checkDoStatement(node);
-                case 205 /* WhileStatement */:
-                    return checkWhileStatement(node);
-                case 206 /* ForStatement */:
-                    return checkForStatement(node);
-                case 207 /* ForInStatement */:
-                    return checkForInStatement(node);
-                case 208 /* ForOfStatement */:
-                    return checkForOfStatement(node);
-                case 209 /* ContinueStatement */:
-                case 210 /* BreakStatement */:
-                    return checkBreakOrContinueStatement(node);
-                case 211 /* ReturnStatement */:
-                    return checkReturnStatement(node);
-                case 212 /* WithStatement */:
-                    return checkWithStatement(node);
-                case 213 /* SwitchStatement */:
-                    return checkSwitchStatement(node);
-                case 214 /* LabeledStatement */:
-                    return checkLabeledStatement(node);
-                case 215 /* ThrowStatement */:
-                    return checkThrowStatement(node);
-                case 216 /* TryStatement */:
-                    return checkTryStatement(node);
-                case 218 /* VariableDeclaration */:
-                    return checkVariableDeclaration(node);
-                case 169 /* BindingElement */:
-                    return checkBindingElement(node);
-                case 221 /* ClassDeclaration */:
-                    return checkClassDeclaration(node);
-                case 222 /* InterfaceDeclaration */:
-                    return checkInterfaceDeclaration(node);
-                case 223 /* TypeAliasDeclaration */:
-                    return checkTypeAliasDeclaration(node);
-                case 224 /* EnumDeclaration */:
-                    return checkEnumDeclaration(node);
-                case 225 /* ModuleDeclaration */:
-                    return checkModuleDeclaration(node);
-                case 230 /* ImportDeclaration */:
-                    return checkImportDeclaration(node);
-                case 229 /* ImportEqualsDeclaration */:
-                    return checkImportEqualsDeclaration(node);
-                case 236 /* ExportDeclaration */:
-                    return checkExportDeclaration(node);
-                case 235 /* ExportAssignment */:
-                    return checkExportAssignment(node);
-                case 201 /* EmptyStatement */:
-                    checkGrammarStatementInAmbientContext(node);
-                    return;
-                case 217 /* DebuggerStatement */:
-                    checkGrammarStatementInAmbientContext(node);
-                    return;
-                case 239 /* MissingDeclaration */:
-                    return checkMissingDeclaration(node);
-            }
-        }
-        // Function and class expression bodies are checked after all statements in the enclosing body. This is
-        // to ensure constructs like the following are permitted:
-        //     const foo = function () {
-        //        const s = foo();
-        //        return "hello";
-        //     }
-        // Here, performing a full type check of the body of the function expression whilst in the process of
-        // determining the type of foo would cause foo to be given type any because of the recursive reference.
-        // Delaying the type check of the body ensures foo has been assigned a type.
-        function checkNodeDeferred(node) {
-            if (deferredNodes) {
-                deferredNodes.push(node);
-            }
-        }
-        function checkDeferredNodes() {
-            for (var _i = 0, deferredNodes_1 = deferredNodes; _i < deferredNodes_1.length; _i++) {
-                var node = deferredNodes_1[_i];
-                switch (node.kind) {
-                    case 179 /* FunctionExpression */:
-                    case 180 /* ArrowFunction */:
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                        checkFunctionExpressionOrObjectLiteralMethodDeferred(node);
-                        break;
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                        checkAccessorDeferred(node);
-                        break;
-                    case 192 /* ClassExpression */:
-                        checkClassExpressionDeferred(node);
-                        break;
-                }
-            }
-        }
-        function checkSourceFile(node) {
-            ts.performance.mark("beforeCheck");
-            checkSourceFileWorker(node);
-            ts.performance.mark("afterCheck");
-            ts.performance.measure("Check", "beforeCheck", "afterCheck");
-        }
-        // Fully type check a source file and collect the relevant diagnostics.
-        function checkSourceFileWorker(node) {
-            var links = getNodeLinks(node);
-            if (!(links.flags & 1 /* TypeChecked */)) {
-                // If skipLibCheck is enabled, skip type checking if file is a declaration file.
-                // If skipDefaultLibCheck is enabled, skip type checking if file contains a
-                // '/// <reference no-default-lib="true"/>' directive.
-                if (compilerOptions.skipLibCheck && node.isDeclarationFile || compilerOptions.skipDefaultLibCheck && node.hasNoDefaultLib) {
-                    return;
-                }
-                // Grammar checking
-                checkGrammarSourceFile(node);
-                potentialThisCollisions.length = 0;
-                deferredNodes = [];
-                deferredUnusedIdentifierNodes = produceDiagnostics && noUnusedIdentifiers ? [] : undefined;
-                ts.forEach(node.statements, checkSourceElement);
-                checkDeferredNodes();
-                if (ts.isExternalModule(node)) {
-                    registerForUnusedIdentifiersCheck(node);
-                }
-                if (!node.isDeclarationFile) {
-                    checkUnusedIdentifiers();
-                }
-                deferredNodes = undefined;
-                deferredUnusedIdentifierNodes = undefined;
-                if (ts.isExternalOrCommonJsModule(node)) {
-                    checkExternalModuleExports(node);
+                        }
+                    }
+                    else {
+                        errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unknown_compiler_option_0, s));
+                    }
                 }
-                if (potentialThisCollisions.length) {
-                    ts.forEach(potentialThisCollisions, checkIfThisIsCapturedInEnclosingScope);
-                    potentialThisCollisions.length = 0;
+                else {
+                    fileNames.push(s);
                 }
-                links.flags |= 1 /* TypeChecked */;
             }
         }
-        function getDiagnostics(sourceFile, ct) {
-            try {
-                // Record the cancellation token so it can be checked later on during checkSourceElement.
-                // Do this in a finally block so we can ensure that it gets reset back to nothing after
-                // this call is done.
-                cancellationToken = ct;
-                return getDiagnosticsWorker(sourceFile);
+        function parseResponseFile(fileName) {
+            var text = readFile ? readFile(fileName) : ts.sys.readFile(fileName);
+            if (!text) {
+                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.File_0_not_found, fileName));
+                return;
             }
-            finally {
-                cancellationToken = undefined;
+            var args = [];
+            var pos = 0;
+            while (true) {
+                while (pos < text.length && text.charCodeAt(pos) <= 32 /* space */)
+                    pos++;
+                if (pos >= text.length)
+                    break;
+                var start = pos;
+                if (text.charCodeAt(start) === 34 /* doubleQuote */) {
+                    pos++;
+                    while (pos < text.length && text.charCodeAt(pos) !== 34 /* doubleQuote */)
+                        pos++;
+                    if (pos < text.length) {
+                        args.push(text.substring(start + 1, pos));
+                        pos++;
+                    }
+                    else {
+                        errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unterminated_quoted_string_in_response_file_0, fileName));
+                    }
+                }
+                else {
+                    while (text.charCodeAt(pos) > 32 /* space */)
+                        pos++;
+                    args.push(text.substring(start, pos));
+                }
             }
+            parseStrings(args);
         }
-        function getDiagnosticsWorker(sourceFile) {
-            throwIfNonDiagnosticsProducing();
-            if (sourceFile) {
-                checkSourceFile(sourceFile);
-                return diagnostics.getDiagnostics(sourceFile.fileName);
+    }
+    ts.parseCommandLine = parseCommandLine;
+    function getOptionFromName(optionName, allowShort) {
+        if (allowShort === void 0) { allowShort = false; }
+        optionName = optionName.toLowerCase();
+        var _a = getOptionNameMap(), optionNameMap = _a.optionNameMap, shortOptionNames = _a.shortOptionNames;
+        // Try to translate short option names to their full equivalents.
+        if (allowShort) {
+            var short = shortOptionNames.get(optionName);
+            if (short !== undefined) {
+                optionName = short;
             }
-            ts.forEach(host.getSourceFiles(), checkSourceFile);
-            return diagnostics.getDiagnostics();
         }
-        function getGlobalDiagnostics() {
-            throwIfNonDiagnosticsProducing();
-            return diagnostics.getGlobalDiagnostics();
+        return optionNameMap.get(optionName);
+    }
+    /**
+     * Read tsconfig.json file
+     * @param fileName The path to the config file
+     */
+    function readConfigFile(fileName, readFile) {
+        var text = "";
+        try {
+            text = readFile(fileName);
         }
-        function throwIfNonDiagnosticsProducing() {
-            if (!produceDiagnostics) {
-                throw new Error("Trying to get diagnostics from a type checker that does not produce them.");
-            }
+        catch (e) {
+            return { config: {}, error: ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_read_file_0_Colon_1, fileName, e.message) };
         }
-        // Language service support
-        function isInsideWithStatementBody(node) {
-            if (node) {
-                while (node.parent) {
-                    if (node.parent.kind === 212 /* WithStatement */ && node.parent.statement === node) {
-                        return true;
-                    }
-                    node = node.parent;
-                }
-            }
-            return false;
+        return parseConfigFileTextToJson(fileName, text);
+    }
+    ts.readConfigFile = readConfigFile;
+    /**
+     * Parse the text of the tsconfig.json file
+     * @param fileName The path to the config file
+     * @param jsonText The text of the config file
+     */
+    function parseConfigFileTextToJson(fileName, jsonText) {
+        var jsonSourceFile = ts.parseJsonText(fileName, jsonText);
+        return {
+            config: convertToObject(jsonSourceFile, jsonSourceFile.parseDiagnostics),
+            error: jsonSourceFile.parseDiagnostics.length ? jsonSourceFile.parseDiagnostics[0] : undefined
+        };
+    }
+    ts.parseConfigFileTextToJson = parseConfigFileTextToJson;
+    /**
+     * Read tsconfig.json file
+     * @param fileName The path to the config file
+     */
+    function readJsonConfigFile(fileName, readFile) {
+        var text = "";
+        try {
+            text = readFile(fileName);
         }
-        function getSymbolsInScope(location, meaning) {
-            var symbols = ts.createMap();
-            var memberFlags = 0 /* None */;
-            if (isInsideWithStatementBody(location)) {
-                // We cannot answer semantic questions within a with block, do not proceed any further
-                return [];
-            }
-            populateSymbols();
-            return symbolsToArray(symbols);
-            function populateSymbols() {
-                while (location) {
-                    if (location.locals && !isGlobalSourceFile(location)) {
-                        copySymbols(location.locals, meaning);
-                    }
-                    switch (location.kind) {
-                        case 256 /* SourceFile */:
-                            if (!ts.isExternalOrCommonJsModule(location)) {
-                                break;
-                            }
-                        case 225 /* ModuleDeclaration */:
-                            copySymbols(getSymbolOfNode(location).exports, meaning & 8914931 /* ModuleMember */);
-                            break;
-                        case 224 /* EnumDeclaration */:
-                            copySymbols(getSymbolOfNode(location).exports, meaning & 8 /* EnumMember */);
-                            break;
-                        case 192 /* ClassExpression */:
-                            var className = location.name;
-                            if (className) {
-                                copySymbol(location.symbol, meaning);
-                            }
-                        // fall through; this fall-through is necessary because we would like to handle
-                        // type parameter inside class expression similar to how we handle it in classDeclaration and interface Declaration
-                        case 221 /* ClassDeclaration */:
-                        case 222 /* InterfaceDeclaration */:
-                            // If we didn't come from static member of class or interface,
-                            // add the type parameters into the symbol table
-                            // (type parameters of classDeclaration/classExpression and interface are in member property of the symbol.
-                            // Note: that the memberFlags come from previous iteration.
-                            if (!(memberFlags & 32 /* Static */)) {
-                                copySymbols(getSymbolOfNode(location).members, meaning & 793064 /* Type */);
-                            }
-                            break;
-                        case 179 /* FunctionExpression */:
-                            var funcName = location.name;
-                            if (funcName) {
-                                copySymbol(location.symbol, meaning);
-                            }
-                            break;
+        catch (e) {
+            return { parseDiagnostics: [ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_read_file_0_Colon_1, fileName, e.message)] };
+        }
+        return ts.parseJsonText(fileName, text);
+    }
+    ts.readJsonConfigFile = readJsonConfigFile;
+    function commandLineOptionsToMap(options) {
+        return ts.arrayToMap(options, function (option) { return option.name; });
+    }
+    var _tsconfigRootOptions;
+    function getTsconfigRootOptionsMap() {
+        if (_tsconfigRootOptions === undefined) {
+            _tsconfigRootOptions = commandLineOptionsToMap([
+                {
+                    name: "compilerOptions",
+                    type: "object",
+                    elementOptions: commandLineOptionsToMap(ts.optionDeclarations),
+                    extraKeyDiagnosticMessage: ts.Diagnostics.Unknown_compiler_option_0
+                },
+                {
+                    name: "typingOptions",
+                    type: "object",
+                    elementOptions: commandLineOptionsToMap(ts.typeAcquisitionDeclarations),
+                    extraKeyDiagnosticMessage: ts.Diagnostics.Unknown_type_acquisition_option_0
+                },
+                {
+                    name: "typeAcquisition",
+                    type: "object",
+                    elementOptions: commandLineOptionsToMap(ts.typeAcquisitionDeclarations),
+                    extraKeyDiagnosticMessage: ts.Diagnostics.Unknown_type_acquisition_option_0
+                },
+                {
+                    name: "extends",
+                    type: "string"
+                },
+                {
+                    name: "files",
+                    type: "list",
+                    element: {
+                        name: "files",
+                        type: "string"
                     }
-                    if (ts.introducesArgumentsExoticObject(location)) {
-                        copySymbol(argumentsSymbol, meaning);
+                },
+                {
+                    name: "include",
+                    type: "list",
+                    element: {
+                        name: "include",
+                        type: "string"
                     }
-                    memberFlags = ts.getModifierFlags(location);
-                    location = location.parent;
-                }
-                copySymbols(globals, meaning);
-            }
-            /**
-             * Copy the given symbol into symbol tables if the symbol has the given meaning
-             * and it doesn't already existed in the symbol table
-             * @param key a key for storing in symbol table; if undefined, use symbol.name
-             * @param symbol the symbol to be added into symbol table
-             * @param meaning meaning of symbol to filter by before adding to symbol table
-             */
-            function copySymbol(symbol, meaning) {
-                if (symbol.flags & meaning) {
-                    var id = symbol.name;
-                    // We will copy all symbol regardless of its reserved name because
-                    // symbolsToArray will check whether the key is a reserved name and
-                    // it will not copy symbol with reserved name to the array
-                    if (!symbols[id]) {
-                        symbols[id] = symbol;
+                },
+                {
+                    name: "exclude",
+                    type: "list",
+                    element: {
+                        name: "exclude",
+                        type: "string"
                     }
+                },
+                ts.compileOnSaveCommandLineOption
+            ]);
+        }
+        return _tsconfigRootOptions;
+    }
+    /**
+     * Convert the json syntax tree into the json value
+     */
+    function convertToObject(sourceFile, errors) {
+        return convertToObjectWorker(sourceFile, errors, /*knownRootOptions*/ undefined, /*jsonConversionNotifier*/ undefined);
+    }
+    ts.convertToObject = convertToObject;
+    /**
+     * Convert the json syntax tree into the json value
+     */
+    function convertToObjectWorker(sourceFile, errors, knownRootOptions, jsonConversionNotifier) {
+        if (!sourceFile.jsonObject) {
+            return {};
+        }
+        return convertObjectLiteralExpressionToJson(sourceFile.jsonObject, knownRootOptions, 
+        /*extraKeyDiagnosticMessage*/ undefined, /*parentOption*/ undefined);
+        function convertObjectLiteralExpressionToJson(node, knownOptions, extraKeyDiagnosticMessage, parentOption) {
+            var result = {};
+            for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
+                var element = _a[_i];
+                if (element.kind !== 261 /* PropertyAssignment */) {
+                    errors.push(ts.createDiagnosticForNodeInSourceFile(sourceFile, element, ts.Diagnostics.Property_assignment_expected));
+                    continue;
                 }
-            }
-            function copySymbols(source, meaning) {
-                if (meaning) {
-                    for (var id in source) {
-                        var symbol = source[id];
-                        copySymbol(symbol, meaning);
+                if (element.questionToken) {
+                    errors.push(ts.createDiagnosticForNodeInSourceFile(sourceFile, element.questionToken, ts.Diagnostics._0_can_only_be_used_in_a_ts_file, "?"));
+                }
+                if (!isDoubleQuotedString(element.name)) {
+                    errors.push(ts.createDiagnosticForNodeInSourceFile(sourceFile, element.name, ts.Diagnostics.String_literal_with_double_quotes_expected));
+                }
+                var keyText = ts.getTextOfPropertyName(element.name);
+                var option = knownOptions ? knownOptions.get(keyText) : undefined;
+                if (extraKeyDiagnosticMessage && !option) {
+                    errors.push(ts.createDiagnosticForNodeInSourceFile(sourceFile, element.name, extraKeyDiagnosticMessage, keyText));
+                }
+                var value = convertPropertyValueToJson(element.initializer, option);
+                if (typeof keyText !== undefined && typeof value !== undefined) {
+                    result[keyText] = value;
+                    // Notify key value set, if user asked for it
+                    if (jsonConversionNotifier &&
+                        // Current callbacks are only on known parent option or if we are setting values in the root
+                        (parentOption || knownOptions === knownRootOptions)) {
+                        var isValidOptionValue = isCompilerOptionsValue(option, value);
+                        if (parentOption) {
+                            if (isValidOptionValue) {
+                                // Notify option set in the parent if its a valid option value
+                                jsonConversionNotifier.onSetValidOptionKeyValueInParent(parentOption, option, value);
+                            }
+                        }
+                        else if (knownOptions === knownRootOptions) {
+                            if (isValidOptionValue) {
+                                // Notify about the valid root key value being set
+                                jsonConversionNotifier.onSetValidOptionKeyValueInRoot(keyText, element.name, value, element.initializer);
+                            }
+                            else if (!option) {
+                                // Notify about the unknown root key value being set
+                                jsonConversionNotifier.onSetUnknownOptionKeyValueInRoot(keyText, element.name, value, element.initializer);
+                            }
+                        }
                     }
                 }
             }
-        }
-        function isTypeDeclarationName(name) {
-            return name.kind === 69 /* Identifier */ &&
-                isTypeDeclaration(name.parent) &&
-                name.parent.name === name;
-        }
-        function isTypeDeclaration(node) {
-            switch (node.kind) {
-                case 141 /* TypeParameter */:
-                case 221 /* ClassDeclaration */:
-                case 222 /* InterfaceDeclaration */:
-                case 223 /* TypeAliasDeclaration */:
-                case 224 /* EnumDeclaration */:
-                    return true;
-            }
-        }
-        // True if the given identifier is part of a type reference
-        function isTypeReferenceIdentifier(entityName) {
-            var node = entityName;
-            while (node.parent && node.parent.kind === 139 /* QualifiedName */) {
-                node = node.parent;
-            }
-            return node.parent && (node.parent.kind === 155 /* TypeReference */ || node.parent.kind === 267 /* JSDocTypeReference */);
-        }
-        function isHeritageClauseElementIdentifier(entityName) {
-            var node = entityName;
-            while (node.parent && node.parent.kind === 172 /* PropertyAccessExpression */) {
-                node = node.parent;
-            }
-            return node.parent && node.parent.kind === 194 /* ExpressionWithTypeArguments */;
-        }
-        function forEachEnclosingClass(node, callback) {
-            var result;
-            while (true) {
-                node = ts.getContainingClass(node);
-                if (!node)
-                    break;
-                if (result = callback(node))
-                    break;
-            }
             return result;
         }
-        function isNodeWithinClass(node, classDeclaration) {
-            return !!forEachEnclosingClass(node, function (n) { return n === classDeclaration; });
-        }
-        function getLeftSideOfImportEqualsOrExportAssignment(nodeOnRightSide) {
-            while (nodeOnRightSide.parent.kind === 139 /* QualifiedName */) {
-                nodeOnRightSide = nodeOnRightSide.parent;
-            }
-            if (nodeOnRightSide.parent.kind === 229 /* ImportEqualsDeclaration */) {
-                return nodeOnRightSide.parent.moduleReference === nodeOnRightSide && nodeOnRightSide.parent;
-            }
-            if (nodeOnRightSide.parent.kind === 235 /* ExportAssignment */) {
-                return nodeOnRightSide.parent.expression === nodeOnRightSide && nodeOnRightSide.parent;
+        function convertArrayLiteralExpressionToJson(elements, elementOption) {
+            var result = [];
+            for (var _i = 0, elements_4 = elements; _i < elements_4.length; _i++) {
+                var element = elements_4[_i];
+                result.push(convertPropertyValueToJson(element, elementOption));
             }
-            return undefined;
-        }
-        function isInRightSideOfImportOrExportAssignment(node) {
-            return getLeftSideOfImportEqualsOrExportAssignment(node) !== undefined;
+            return result;
         }
-        function getSymbolOfEntityNameOrPropertyAccessExpression(entityName) {
-            if (ts.isDeclarationName(entityName)) {
-                return getSymbolOfNode(entityName.parent);
-            }
-            if (ts.isInJavaScriptFile(entityName) && entityName.parent.kind === 172 /* PropertyAccessExpression */) {
-                var specialPropertyAssignmentKind = ts.getSpecialPropertyAssignmentKind(entityName.parent.parent);
-                switch (specialPropertyAssignmentKind) {
-                    case 1 /* ExportsProperty */:
-                    case 3 /* PrototypeProperty */:
-                        return getSymbolOfNode(entityName.parent);
-                    case 4 /* ThisProperty */:
-                    case 2 /* ModuleExports */:
-                        return getSymbolOfNode(entityName.parent.parent);
-                    default:
-                }
-            }
-            if (entityName.parent.kind === 235 /* ExportAssignment */ && ts.isEntityNameExpression(entityName)) {
-                return resolveEntityName(entityName, 
-                /*all meanings*/ 107455 /* Value */ | 793064 /* Type */ | 1920 /* Namespace */ | 8388608 /* Alias */);
-            }
-            if (entityName.kind !== 172 /* PropertyAccessExpression */ && isInRightSideOfImportOrExportAssignment(entityName)) {
-                // Since we already checked for ExportAssignment, this really could only be an Import
-                var importEqualsDeclaration = ts.getAncestor(entityName, 229 /* ImportEqualsDeclaration */);
-                ts.Debug.assert(importEqualsDeclaration !== undefined);
-                return getSymbolOfPartOfRightHandSideOfImportEquals(entityName, importEqualsDeclaration, /*dontResolveAlias*/ true);
-            }
-            if (ts.isRightSideOfQualifiedNameOrPropertyAccess(entityName)) {
-                entityName = entityName.parent;
-            }
-            if (isHeritageClauseElementIdentifier(entityName)) {
-                var meaning = 0 /* None */;
-                // In an interface or class, we're definitely interested in a type.
-                if (entityName.parent.kind === 194 /* ExpressionWithTypeArguments */) {
-                    meaning = 793064 /* Type */;
-                    // In a class 'extends' clause we are also looking for a value.
-                    if (ts.isExpressionWithTypeArgumentsInClassExtendsClause(entityName.parent)) {
-                        meaning |= 107455 /* Value */;
+        function convertPropertyValueToJson(valueExpression, option) {
+            switch (valueExpression.kind) {
+                case 101 /* TrueKeyword */:
+                    reportInvalidOptionValue(option && option.type !== "boolean");
+                    return true;
+                case 86 /* FalseKeyword */:
+                    reportInvalidOptionValue(option && option.type !== "boolean");
+                    return false;
+                case 95 /* NullKeyword */:
+                    reportInvalidOptionValue(!!option);
+                    return null; // tslint:disable-line:no-null-keyword
+                case 9 /* StringLiteral */:
+                    if (!isDoubleQuotedString(valueExpression)) {
+                        errors.push(ts.createDiagnosticForNodeInSourceFile(sourceFile, valueExpression, ts.Diagnostics.String_literal_with_double_quotes_expected));
                     }
-                }
-                else {
-                    meaning = 1920 /* Namespace */;
-                }
-                meaning |= 8388608 /* Alias */;
-                return resolveEntityName(entityName, meaning);
-            }
-            else if (ts.isPartOfExpression(entityName)) {
-                if (ts.nodeIsMissing(entityName)) {
-                    // Missing entity name.
-                    return undefined;
-                }
-                if (entityName.kind === 69 /* Identifier */) {
-                    if (ts.isJSXTagName(entityName) && isJsxIntrinsicIdentifier(entityName)) {
-                        return getIntrinsicTagSymbol(entityName.parent);
+                    reportInvalidOptionValue(option && (typeof option.type === "string" && option.type !== "string"));
+                    var text = valueExpression.text;
+                    if (option && typeof option.type !== "string") {
+                        var customOption = option;
+                        // Validate custom option type
+                        if (!customOption.type.has(text)) {
+                            errors.push(createDiagnosticForInvalidCustomType(customOption, function (message, arg0, arg1) { return ts.createDiagnosticForNodeInSourceFile(sourceFile, valueExpression, message, arg0, arg1); }));
+                        }
                     }
-                    return resolveEntityName(entityName, 107455 /* Value */, /*ignoreErrors*/ false, /*dontResolveAlias*/ true);
-                }
-                else if (entityName.kind === 172 /* PropertyAccessExpression */) {
-                    var symbol = getNodeLinks(entityName).resolvedSymbol;
-                    if (!symbol) {
-                        checkPropertyAccessExpression(entityName);
+                    return text;
+                case 8 /* NumericLiteral */:
+                    reportInvalidOptionValue(option && option.type !== "number");
+                    return Number(valueExpression.text);
+                case 178 /* ObjectLiteralExpression */:
+                    reportInvalidOptionValue(option && option.type !== "object");
+                    var objectLiteralExpression = valueExpression;
+                    // Currently having element option declaration in the tsconfig with type "object"
+                    // determines if it needs onSetValidOptionKeyValueInParent callback or not
+                    // At moment there are only "compilerOptions", "typeAcquisition" and "typingOptions"
+                    // that satifies it and need it to modify options set in them (for normalizing file paths)
+                    // vs what we set in the json
+                    // If need arises, we can modify this interface and callbacks as needed
+                    if (option) {
+                        var _a = option, elementOptions = _a.elementOptions, extraKeyDiagnosticMessage = _a.extraKeyDiagnosticMessage, optionName = _a.name;
+                        return convertObjectLiteralExpressionToJson(objectLiteralExpression, elementOptions, extraKeyDiagnosticMessage, optionName);
                     }
-                    return getNodeLinks(entityName).resolvedSymbol;
-                }
-                else if (entityName.kind === 139 /* QualifiedName */) {
-                    var symbol = getNodeLinks(entityName).resolvedSymbol;
-                    if (!symbol) {
-                        checkQualifiedName(entityName);
+                    else {
+                        return convertObjectLiteralExpressionToJson(objectLiteralExpression, /* knownOptions*/ undefined, 
+                        /*extraKeyDiagnosticMessage */ undefined, /*parentOption*/ undefined);
                     }
-                    return getNodeLinks(entityName).resolvedSymbol;
-                }
+                case 177 /* ArrayLiteralExpression */:
+                    reportInvalidOptionValue(option && option.type !== "list");
+                    return convertArrayLiteralExpressionToJson(valueExpression.elements, option && option.element);
             }
-            else if (isTypeReferenceIdentifier(entityName)) {
-                var meaning = (entityName.parent.kind === 155 /* TypeReference */ || entityName.parent.kind === 267 /* JSDocTypeReference */) ? 793064 /* Type */ : 1920 /* Namespace */;
-                return resolveEntityName(entityName, meaning, /*ignoreErrors*/ false, /*dontResolveAlias*/ true);
-            }
-            else if (entityName.parent.kind === 246 /* JsxAttribute */) {
-                return getJsxAttributePropertySymbol(entityName.parent);
+            // Not in expected format
+            if (option) {
+                reportInvalidOptionValue(/*isError*/ true);
             }
-            if (entityName.parent.kind === 154 /* TypePredicate */) {
-                return resolveEntityName(entityName, /*meaning*/ 1 /* FunctionScopedVariable */);
+            else {
+                errors.push(ts.createDiagnosticForNodeInSourceFile(sourceFile, valueExpression, ts.Diagnostics.Property_value_can_only_be_string_literal_numeric_literal_true_false_null_object_literal_or_array_literal));
             }
-            // Do we want to return undefined here?
             return undefined;
+            function reportInvalidOptionValue(isError) {
+                if (isError) {
+                    errors.push(ts.createDiagnosticForNodeInSourceFile(sourceFile, valueExpression, ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1, option.name, getCompilerOptionValueTypeString(option)));
+                }
+            }
         }
-        function getSymbolAtLocation(node) {
-            if (node.kind === 256 /* SourceFile */) {
-                return ts.isExternalModule(node) ? getMergedSymbol(node.symbol) : undefined;
+        function isDoubleQuotedString(node) {
+            return node.kind === 9 /* StringLiteral */ && ts.getSourceTextOfNodeFromSourceFile(sourceFile, node).charCodeAt(0) === 34 /* doubleQuote */;
+        }
+    }
+    function getCompilerOptionValueTypeString(option) {
+        return option.type === "list" ?
+            "Array" :
+            typeof option.type === "string" ? option.type : "string";
+    }
+    function isCompilerOptionsValue(option, value) {
+        if (option) {
+            if (option.type === "list") {
+                return ts.isArray(value);
             }
-            if (isInsideWithStatementBody(node)) {
-                // We cannot answer semantic questions within a with block, do not proceed any further
+            var expectedType = typeof option.type === "string" ? option.type : "string";
+            return typeof value === expectedType;
+        }
+    }
+    /**
+     * Generate tsconfig configuration when running command line "--init"
+     * @param options commandlineOptions to be generated into tsconfig.json
+     * @param fileNames array of filenames to be generated into tsconfig.json
+     */
+    /* @internal */
+    function generateTSConfig(options, fileNames, newLine) {
+        var compilerOptions = ts.extend(options, ts.defaultInitCompilerOptions);
+        var configurations = {
+            compilerOptions: serializeCompilerOptions(compilerOptions)
+        };
+        if (fileNames && fileNames.length) {
+            // only set the files property if we have at least one file
+            configurations.files = fileNames;
+        }
+        return writeConfigurations();
+        function getCustomTypeMapOfCommandLineOption(optionDefinition) {
+            if (optionDefinition.type === "string" || optionDefinition.type === "number" || optionDefinition.type === "boolean") {
+                // this is of a type CommandLineOptionOfPrimitiveType
                 return undefined;
             }
-            if (ts.isDeclarationName(node)) {
-                // This is a declaration, call getSymbolOfNode
-                return getSymbolOfNode(node.parent);
+            else if (optionDefinition.type === "list") {
+                return getCustomTypeMapOfCommandLineOption(optionDefinition.element);
             }
-            else if (ts.isLiteralComputedPropertyDeclarationName(node)) {
-                return getSymbolOfNode(node.parent.parent);
+            else {
+                return optionDefinition.type;
             }
-            if (node.kind === 69 /* Identifier */) {
-                if (isInRightSideOfImportOrExportAssignment(node)) {
-                    return getSymbolOfEntityNameOrPropertyAccessExpression(node);
+        }
+        function getNameOfCompilerOptionValue(value, customTypeMap) {
+            // There is a typeMap associated with this command-line option so use it to map value back to its name
+            return ts.forEachEntry(customTypeMap, function (mapValue, key) {
+                if (mapValue === value) {
+                    return key;
                 }
-                else if (node.parent.kind === 169 /* BindingElement */ &&
-                    node.parent.parent.kind === 167 /* ObjectBindingPattern */ &&
-                    node === node.parent.propertyName) {
-                    var typeOfPattern = getTypeOfNode(node.parent.parent);
-                    var propertyDeclaration = typeOfPattern && getPropertyOfType(typeOfPattern, node.text);
-                    if (propertyDeclaration) {
-                        return propertyDeclaration;
+            });
+        }
+        function serializeCompilerOptions(options) {
+            var result = {};
+            var optionsNameMap = getOptionNameMap().optionNameMap;
+            for (var name_37 in options) {
+                if (ts.hasProperty(options, name_37)) {
+                    // tsconfig only options cannot be specified via command line,
+                    // so we can assume that only types that can appear here string | number | boolean
+                    if (optionsNameMap.has(name_37) && optionsNameMap.get(name_37).category === ts.Diagnostics.Command_line_Options) {
+                        continue;
                     }
-                }
-            }
-            switch (node.kind) {
-                case 69 /* Identifier */:
-                case 172 /* PropertyAccessExpression */:
-                case 139 /* QualifiedName */:
-                    return getSymbolOfEntityNameOrPropertyAccessExpression(node);
-                case 97 /* ThisKeyword */:
-                    var container = ts.getThisContainer(node, /*includeArrowFunctions*/ false);
-                    if (ts.isFunctionLike(container)) {
-                        var sig = getSignatureFromDeclaration(container);
-                        if (sig.thisParameter) {
-                            return sig.thisParameter;
+                    var value = options[name_37];
+                    var optionDefinition = optionsNameMap.get(name_37.toLowerCase());
+                    if (optionDefinition) {
+                        var customTypeMap = getCustomTypeMapOfCommandLineOption(optionDefinition);
+                        if (!customTypeMap) {
+                            // There is no map associated with this compiler option then use the value as-is
+                            // This is the case if the value is expect to be string, number, boolean or list of string
+                            result[name_37] = value;
+                        }
+                        else {
+                            if (optionDefinition.type === "list") {
+                                var convertedValue = [];
+                                for (var _i = 0, _a = value; _i < _a.length; _i++) {
+                                    var element = _a[_i];
+                                    convertedValue.push(getNameOfCompilerOptionValue(element, customTypeMap));
+                                }
+                                result[name_37] = convertedValue;
+                            }
+                            else {
+                                // There is a typeMap associated with this command-line option so use it to map value back to its name
+                                result[name_37] = getNameOfCompilerOptionValue(value, customTypeMap);
+                            }
                         }
                     }
-                // fallthrough
-                case 95 /* SuperKeyword */:
-                    var type = ts.isPartOfExpression(node) ? checkExpression(node) : getTypeFromTypeNode(node);
-                    return type.symbol;
-                case 165 /* ThisType */:
-                    return getTypeFromTypeNode(node).symbol;
-                case 121 /* ConstructorKeyword */:
-                    // constructor keyword for an overload, should take us to the definition if it exist
-                    var constructorDeclaration = node.parent;
-                    if (constructorDeclaration && constructorDeclaration.kind === 148 /* Constructor */) {
-                        return constructorDeclaration.parent.symbol;
-                    }
-                    return undefined;
-                case 9 /* StringLiteral */:
-                    // External module name in an import declaration
-                    if ((ts.isExternalModuleImportEqualsDeclaration(node.parent.parent) &&
-                        ts.getExternalModuleImportEqualsDeclarationExpression(node.parent.parent) === node) ||
-                        ((node.parent.kind === 230 /* ImportDeclaration */ || node.parent.kind === 236 /* ExportDeclaration */) &&
-                            node.parent.moduleSpecifier === node)) {
-                        return resolveExternalModuleName(node, node);
-                    }
-                // Fall through
-                case 8 /* NumericLiteral */:
-                    // index access
-                    if (node.parent.kind === 173 /* ElementAccessExpression */ && node.parent.argumentExpression === node) {
-                        var objectType = checkExpression(node.parent.expression);
-                        if (objectType === unknownType)
-                            return undefined;
-                        var apparentType = getApparentType(objectType);
-                        if (apparentType === unknownType)
-                            return undefined;
-                        return getPropertyOfType(apparentType, node.text);
-                    }
-                    break;
+                }
             }
-            return undefined;
+            return result;
         }
-        function getShorthandAssignmentValueSymbol(location) {
-            // The function returns a value symbol of an identifier in the short-hand property assignment.
-            // This is necessary as an identifier in short-hand property assignment can contains two meaning:
-            // property name and property value.
-            if (location && location.kind === 254 /* ShorthandPropertyAssignment */) {
-                return resolveEntityName(location.name, 107455 /* Value */ | 8388608 /* Alias */);
+        function getDefaultValueForOption(option) {
+            switch (option.type) {
+                case "number":
+                    return 1;
+                case "boolean":
+                    return true;
+                case "string":
+                    return option.isFilePath ? "./" : "";
+                case "list":
+                    return [];
+                case "object":
+                    return {};
+                default:
+                    return ts.arrayFrom(option.type.keys())[0];
             }
-            return undefined;
         }
-        /** Returns the target of an export specifier without following aliases */
-        function getExportSpecifierLocalTargetSymbol(node) {
-            return node.parent.parent.moduleSpecifier ?
-                getExternalModuleMember(node.parent.parent, node) :
-                resolveEntityName(node.propertyName || node.name, 107455 /* Value */ | 793064 /* Type */ | 1920 /* Namespace */ | 8388608 /* Alias */);
-        }
-        function getTypeOfNode(node) {
-            if (isInsideWithStatementBody(node)) {
-                // We cannot answer semantic questions within a with block, do not proceed any further
-                return unknownType;
-            }
-            if (ts.isPartOfTypeNode(node)) {
-                return getTypeFromTypeNode(node);
-            }
-            if (ts.isPartOfExpression(node)) {
-                return getTypeOfExpression(node);
-            }
-            if (ts.isExpressionWithTypeArgumentsInClassExtendsClause(node)) {
-                // A SyntaxKind.ExpressionWithTypeArguments is considered a type node, except when it occurs in the
-                // extends clause of a class. We handle that case here.
-                return getBaseTypes(getDeclaredTypeOfSymbol(getSymbolOfNode(node.parent.parent)))[0];
-            }
-            if (isTypeDeclaration(node)) {
-                // In this case, we call getSymbolOfNode instead of getSymbolAtLocation because it is a declaration
-                var symbol = getSymbolOfNode(node);
-                return getDeclaredTypeOfSymbol(symbol);
-            }
-            if (isTypeDeclarationName(node)) {
-                var symbol = getSymbolAtLocation(node);
-                return symbol && getDeclaredTypeOfSymbol(symbol);
-            }
-            if (ts.isDeclaration(node)) {
-                // In this case, we call getSymbolOfNode instead of getSymbolAtLocation because it is a declaration
-                var symbol = getSymbolOfNode(node);
-                return getTypeOfSymbol(symbol);
-            }
-            if (ts.isDeclarationName(node)) {
-                var symbol = getSymbolAtLocation(node);
-                return symbol && getTypeOfSymbol(symbol);
-            }
-            if (ts.isBindingPattern(node)) {
-                return getTypeForVariableLikeDeclaration(node.parent, /*includeOptionality*/ true);
-            }
-            if (isInRightSideOfImportOrExportAssignment(node)) {
-                var symbol = getSymbolAtLocation(node);
-                var declaredType = symbol && getDeclaredTypeOfSymbol(symbol);
-                return declaredType !== unknownType ? declaredType : getTypeOfSymbol(symbol);
-            }
-            return unknownType;
+        function makePadding(paddingLength) {
+            return Array(paddingLength + 1).join(" ");
         }
-        // Gets the type of object literal or array literal of destructuring assignment.
-        // { a } from
-        //     for ( { a } of elems) {
-        //     }
-        // [ a ] from
-        //     [a] = [ some array ...]
-        function getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(expr) {
-            ts.Debug.assert(expr.kind === 171 /* ObjectLiteralExpression */ || expr.kind === 170 /* ArrayLiteralExpression */);
-            // If this is from "for of"
-            //     for ( { a } of elems) {
-            //     }
-            if (expr.parent.kind === 208 /* ForOfStatement */) {
-                var iteratedType = checkRightHandSideOfForOf(expr.parent.expression);
-                return checkDestructuringAssignment(expr, iteratedType || unknownType);
-            }
-            // If this is from "for" initializer
-            //     for ({a } = elems[0];.....) { }
-            if (expr.parent.kind === 187 /* BinaryExpression */) {
-                var iteratedType = checkExpression(expr.parent.right);
-                return checkDestructuringAssignment(expr, iteratedType || unknownType);
+        function writeConfigurations() {
+            // Filter applicable options to place in the file
+            var categorizedOptions = ts.reduceLeft(ts.filter(ts.optionDeclarations, function (o) { return o.category !== ts.Diagnostics.Command_line_Options && o.category !== ts.Diagnostics.Advanced_Options; }), function (memo, value) {
+                if (value.category) {
+                    var name_38 = ts.getLocaleSpecificMessage(value.category);
+                    (memo[name_38] || (memo[name_38] = [])).push(value);
+                }
+                return memo;
+            }, {});
+            // Serialize all options and thier descriptions
+            var marginLength = 0;
+            var seenKnownKeys = 0;
+            var nameColumn = [];
+            var descriptionColumn = [];
+            var knownKeysCount = ts.getOwnKeys(configurations.compilerOptions).length;
+            for (var category in categorizedOptions) {
+                if (nameColumn.length !== 0) {
+                    nameColumn.push("");
+                    descriptionColumn.push("");
+                }
+                nameColumn.push("/* " + category + " */");
+                descriptionColumn.push("");
+                for (var _i = 0, _a = categorizedOptions[category]; _i < _a.length; _i++) {
+                    var option = _a[_i];
+                    var optionName = void 0;
+                    if (ts.hasProperty(configurations.compilerOptions, option.name)) {
+                        optionName = "\"" + option.name + "\": " + JSON.stringify(configurations.compilerOptions[option.name]) + ((seenKnownKeys += 1) === knownKeysCount ? "" : ",");
+                    }
+                    else {
+                        optionName = "// \"" + option.name + "\": " + JSON.stringify(getDefaultValueForOption(option)) + ",";
+                    }
+                    nameColumn.push(optionName);
+                    descriptionColumn.push("/* " + (option.description && ts.getLocaleSpecificMessage(option.description) || option.name) + " */");
+                    marginLength = Math.max(optionName.length, marginLength);
+                }
             }
-            // If this is from nested object binding pattern
-            //     for ({ skills: { primary, secondary } } = multiRobot, i = 0; i < 1; i++) {
-            if (expr.parent.kind === 253 /* PropertyAssignment */) {
-                var typeOfParentObjectLiteral = getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(expr.parent.parent);
-                return checkObjectLiteralDestructuringPropertyAssignment(typeOfParentObjectLiteral || unknownType, expr.parent);
+            // Write the output
+            var tab = makePadding(2);
+            var result = [];
+            result.push("{");
+            result.push(tab + "\"compilerOptions\": {");
+            // Print out each row, aligning all the descriptions on the same column.
+            for (var i = 0; i < nameColumn.length; i++) {
+                var optionName = nameColumn[i];
+                var description = descriptionColumn[i];
+                result.push(optionName && "" + tab + tab + optionName + (description && (makePadding(marginLength - optionName.length + 2) + description)));
+            }
+            if (configurations.files && configurations.files.length) {
+                result.push(tab + "},");
+                result.push(tab + "\"files\": [");
+                for (var i = 0; i < configurations.files.length; i++) {
+                    result.push("" + tab + tab + JSON.stringify(configurations.files[i]) + (i === configurations.files.length - 1 ? "" : ","));
+                }
+                result.push(tab + "]");
             }
-            // Array literal assignment - array destructuring pattern
-            ts.Debug.assert(expr.parent.kind === 170 /* ArrayLiteralExpression */);
-            //    [{ property1: p1, property2 }] = elems;
-            var typeOfArrayLiteral = getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(expr.parent);
-            var elementType = checkIteratedTypeOrElementType(typeOfArrayLiteral || unknownType, expr.parent, /*allowStringInput*/ false) || unknownType;
-            return checkArrayLiteralDestructuringElementAssignment(expr.parent, typeOfArrayLiteral, ts.indexOf(expr.parent.elements, expr), elementType || unknownType);
-        }
-        // Gets the property symbol corresponding to the property in destructuring assignment
-        // 'property1' from
-        //     for ( { property1: a } of elems) {
-        //     }
-        // 'property1' at location 'a' from:
-        //     [a] = [ property1, property2 ]
-        function getPropertySymbolOfDestructuringAssignment(location) {
-            // Get the type of the object or array literal and then look for property of given name in the type
-            var typeOfObjectLiteral = getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(location.parent.parent);
-            return typeOfObjectLiteral && getPropertyOfType(typeOfObjectLiteral, location.text);
-        }
-        function getTypeOfExpression(expr) {
-            if (ts.isRightSideOfQualifiedNameOrPropertyAccess(expr)) {
-                expr = expr.parent;
+            else {
+                result.push(tab + "}");
             }
-            return getRegularTypeOfLiteralType(checkExpression(expr));
-        }
-        /**
-          * Gets either the static or instance type of a class element, based on
-          * whether the element is declared as "static".
-          */
-        function getParentTypeOfClassElement(node) {
-            var classSymbol = getSymbolOfNode(node.parent);
-            return ts.getModifierFlags(node) & 32 /* Static */
-                ? getTypeOfSymbol(classSymbol)
-                : getDeclaredTypeOfSymbol(classSymbol);
+            result.push("}");
+            return result.join(newLine);
         }
-        // Return the list of properties of the given type, augmented with properties from Function
-        // if the type has call or construct signatures
-        function getAugmentedPropertiesOfType(type) {
-            type = getApparentType(type);
-            var propsByName = createSymbolTable(getPropertiesOfType(type));
-            if (getSignaturesOfType(type, 0 /* Call */).length || getSignaturesOfType(type, 1 /* Construct */).length) {
-                ts.forEach(getPropertiesOfType(globalFunctionType), function (p) {
-                    if (!propsByName[p.name]) {
-                        propsByName[p.name] = p;
-                    }
-                });
-            }
-            return getNamedMembers(propsByName);
+    }
+    ts.generateTSConfig = generateTSConfig;
+    /**
+     * Parse the contents of a config file (tsconfig.json).
+     * @param json The contents of the config file to parse
+     * @param host Instance of ParseConfigHost used to enumerate files in folder.
+     * @param basePath A root directory to resolve relative path entries in the config
+     *    file to. e.g. outDir
+     */
+    function parseJsonConfigFileContent(json, host, basePath, existingOptions, configFileName, resolutionStack, extraFileExtensions) {
+        return parseJsonConfigFileContentWorker(json, /*sourceFile*/ undefined, host, basePath, existingOptions, configFileName, resolutionStack, extraFileExtensions);
+    }
+    ts.parseJsonConfigFileContent = parseJsonConfigFileContent;
+    /**
+     * Parse the contents of a config file (tsconfig.json).
+     * @param jsonNode The contents of the config file to parse
+     * @param host Instance of ParseConfigHost used to enumerate files in folder.
+     * @param basePath A root directory to resolve relative path entries in the config
+     *    file to. e.g. outDir
+     */
+    function parseJsonSourceFileConfigFileContent(sourceFile, host, basePath, existingOptions, configFileName, resolutionStack, extraFileExtensions) {
+        return parseJsonConfigFileContentWorker(/*json*/ undefined, sourceFile, host, basePath, existingOptions, configFileName, resolutionStack, extraFileExtensions);
+    }
+    ts.parseJsonSourceFileConfigFileContent = parseJsonSourceFileConfigFileContent;
+    /*@internal*/
+    function setConfigFileInOptions(options, configFile) {
+        if (configFile) {
+            Object.defineProperty(options, "configFile", { enumerable: false, writable: false, value: configFile });
         }
-        function getRootSymbols(symbol) {
-            if (symbol.flags & 268435456 /* SyntheticProperty */) {
-                var symbols_3 = [];
-                var name_23 = symbol.name;
-                ts.forEach(getSymbolLinks(symbol).containingType.types, function (t) {
-                    var symbol = getPropertyOfType(t, name_23);
-                    if (symbol) {
-                        symbols_3.push(symbol);
+    }
+    ts.setConfigFileInOptions = setConfigFileInOptions;
+    /**
+     * Parse the contents of a config file from json or json source file (tsconfig.json).
+     * @param json The contents of the config file to parse
+     * @param sourceFile sourceFile corresponding to the Json
+     * @param host Instance of ParseConfigHost used to enumerate files in folder.
+     * @param basePath A root directory to resolve relative path entries in the config
+     *    file to. e.g. outDir
+     * @param resolutionStack Only present for backwards-compatibility. Should be empty.
+     */
+    function parseJsonConfigFileContentWorker(json, sourceFile, host, basePath, existingOptions, configFileName, resolutionStack, extraFileExtensions) {
+        if (existingOptions === void 0) { existingOptions = {}; }
+        if (resolutionStack === void 0) { resolutionStack = []; }
+        if (extraFileExtensions === void 0) { extraFileExtensions = []; }
+        ts.Debug.assert((json === undefined && sourceFile !== undefined) || (json !== undefined && sourceFile === undefined));
+        var errors = [];
+        var parsedConfig = parseConfig(json, sourceFile, host, basePath, configFileName, resolutionStack, errors);
+        var raw = parsedConfig.raw;
+        var options = ts.extend(existingOptions, parsedConfig.options || {});
+        options.configFilePath = configFileName;
+        setConfigFileInOptions(options, sourceFile);
+        var _a = getFileNames(), fileNames = _a.fileNames, wildcardDirectories = _a.wildcardDirectories;
+        return {
+            options: options,
+            fileNames: fileNames,
+            typeAcquisition: parsedConfig.typeAcquisition || getDefaultTypeAcquisition(),
+            raw: raw,
+            errors: errors,
+            wildcardDirectories: wildcardDirectories,
+            compileOnSave: !!raw.compileOnSave
+        };
+        function getFileNames() {
+            var fileNames;
+            if (ts.hasProperty(raw, "files")) {
+                if (ts.isArray(raw["files"])) {
+                    fileNames = raw["files"];
+                    if (fileNames.length === 0) {
+                        createCompilerDiagnosticOnlyIfJson(ts.Diagnostics.The_files_list_in_config_file_0_is_empty, configFileName || "tsconfig.json");
                     }
-                });
-                return symbols_3;
+                }
+                else {
+                    createCompilerDiagnosticOnlyIfJson(ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1, "files", "Array");
+                }
             }
-            else if (symbol.flags & 67108864 /* Transient */) {
-                var target = void 0;
-                var next = symbol;
-                while (next = getSymbolLinks(next).target) {
-                    target = next;
+            var includeSpecs;
+            if (ts.hasProperty(raw, "include")) {
+                if (ts.isArray(raw["include"])) {
+                    includeSpecs = raw["include"];
                 }
-                if (target) {
-                    return [target];
+                else {
+                    createCompilerDiagnosticOnlyIfJson(ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1, "include", "Array");
                 }
             }
-            return [symbol];
-        }
-        // Emitter support
-        function isArgumentsLocalBinding(node) {
-            if (!ts.isGeneratedIdentifier(node)) {
-                node = ts.getParseTreeNode(node, ts.isIdentifier);
-                if (node) {
-                    return getReferencedValueSymbol(node) === argumentsSymbol;
+            var excludeSpecs;
+            if (ts.hasProperty(raw, "exclude")) {
+                if (ts.isArray(raw["exclude"])) {
+                    excludeSpecs = raw["exclude"];
+                }
+                else {
+                    createCompilerDiagnosticOnlyIfJson(ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1, "exclude", "Array");
                 }
             }
-            return false;
-        }
-        function moduleExportsSomeValue(moduleReferenceExpression) {
-            var moduleSymbol = resolveExternalModuleName(moduleReferenceExpression.parent, moduleReferenceExpression);
-            if (!moduleSymbol || ts.isShorthandAmbientModuleSymbol(moduleSymbol)) {
-                // If the module is not found or is shorthand, assume that it may export a value.
-                return true;
+            else {
+                // If no includes were specified, exclude common package folders and the outDir
+                excludeSpecs = includeSpecs ? [] : ["node_modules", "bower_components", "jspm_packages"];
+                var outDir = raw["compilerOptions"] && raw["compilerOptions"]["outDir"];
+                if (outDir) {
+                    excludeSpecs.push(outDir);
+                }
             }
-            var hasExportAssignment = hasExportAssignmentSymbol(moduleSymbol);
-            // if module has export assignment then 'resolveExternalModuleSymbol' will return resolved symbol for export assignment
-            // otherwise it will return moduleSymbol itself
-            moduleSymbol = resolveExternalModuleSymbol(moduleSymbol);
-            var symbolLinks = getSymbolLinks(moduleSymbol);
-            if (symbolLinks.exportsSomeValue === undefined) {
-                // for export assignments - check if resolved symbol for RHS is itself a value
-                // otherwise - check if at least one export is value
-                symbolLinks.exportsSomeValue = hasExportAssignment
-                    ? !!(moduleSymbol.flags & 107455 /* Value */)
-                    : ts.forEachProperty(getExportsOfModule(moduleSymbol), isValue);
+            if (fileNames === undefined && includeSpecs === undefined) {
+                includeSpecs = ["**/*"];
             }
-            return symbolLinks.exportsSomeValue;
-            function isValue(s) {
-                s = resolveSymbol(s);
-                return s && !!(s.flags & 107455 /* Value */);
+            var result = matchFileNames(fileNames, includeSpecs, excludeSpecs, basePath, options, host, errors, extraFileExtensions, sourceFile);
+            if (result.fileNames.length === 0 && !ts.hasProperty(raw, "files") && resolutionStack.length === 0) {
+                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.No_inputs_were_found_in_config_file_0_Specified_include_paths_were_1_and_exclude_paths_were_2, configFileName || "tsconfig.json", JSON.stringify(includeSpecs || []), JSON.stringify(excludeSpecs || [])));
             }
+            return result;
         }
-        function isNameOfModuleOrEnumDeclaration(node) {
-            var parent = node.parent;
-            return ts.isModuleOrEnumDeclaration(parent) && node === parent.name;
+        function createCompilerDiagnosticOnlyIfJson(message, arg0, arg1) {
+            if (!sourceFile) {
+                errors.push(ts.createCompilerDiagnostic(message, arg0, arg1));
+            }
         }
-        // When resolved as an expression identifier, if the given node references an exported entity, return the declaration
-        // node of the exported entity's container. Otherwise, return undefined.
-        function getReferencedExportContainer(node, prefixLocals) {
-            node = ts.getParseTreeNode(node, ts.isIdentifier);
-            if (node) {
-                // When resolving the export container for the name of a module or enum
-                // declaration, we need to start resolution at the declaration's container.
-                // Otherwise, we could incorrectly resolve the export container as the
-                // declaration if it contains an exported member with the same name.
-                var symbol = getReferencedValueSymbol(node, /*startInDeclarationContainer*/ isNameOfModuleOrEnumDeclaration(node));
-                if (symbol) {
-                    if (symbol.flags & 1048576 /* ExportValue */) {
-                        // If we reference an exported entity within the same module declaration, then whether
-                        // we prefix depends on the kind of entity. SymbolFlags.ExportHasLocal encompasses all the
-                        // kinds that we do NOT prefix.
-                        var exportSymbol = getMergedSymbol(symbol.exportSymbol);
-                        if (!prefixLocals && exportSymbol.flags & 944 /* ExportHasLocal */) {
-                            return undefined;
-                        }
-                        symbol = exportSymbol;
+    }
+    function isSuccessfulParsedTsconfig(value) {
+        return !!value.options;
+    }
+    /**
+     * This *just* extracts options/include/exclude/files out of a config file.
+     * It does *not* resolve the included files.
+     */
+    function parseConfig(json, sourceFile, host, basePath, configFileName, resolutionStack, errors) {
+        basePath = ts.normalizeSlashes(basePath);
+        var getCanonicalFileName = ts.createGetCanonicalFileName(host.useCaseSensitiveFileNames);
+        var resolvedPath = ts.toPath(configFileName || "", basePath, getCanonicalFileName);
+        if (resolutionStack.indexOf(resolvedPath) >= 0) {
+            errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Circularity_detected_while_resolving_configuration_Colon_0, resolutionStack.concat([resolvedPath]).join(" -> ")));
+            return { raw: json || convertToObject(sourceFile, errors) };
+        }
+        var ownConfig = json ?
+            parseOwnConfigOfJson(json, host, basePath, getCanonicalFileName, configFileName, errors) :
+            parseOwnConfigOfJsonSourceFile(sourceFile, host, basePath, getCanonicalFileName, configFileName, errors);
+        if (ownConfig.extendedConfigPath) {
+            // copy the resolution stack so it is never reused between branches in potential diamond-problem scenarios.
+            resolutionStack = resolutionStack.concat([resolvedPath]);
+            var extendedConfig = getExtendedConfig(sourceFile, ownConfig.extendedConfigPath, host, basePath, getCanonicalFileName, resolutionStack, errors);
+            if (extendedConfig && isSuccessfulParsedTsconfig(extendedConfig)) {
+                var baseRaw_1 = extendedConfig.raw;
+                var raw_1 = ownConfig.raw;
+                var setPropertyInRawIfNotUndefined = function (propertyName) {
+                    var value = raw_1[propertyName] || baseRaw_1[propertyName];
+                    if (value) {
+                        raw_1[propertyName] = value;
                     }
-                    var parentSymbol = getParentOfSymbol(symbol);
-                    if (parentSymbol) {
-                        if (parentSymbol.flags & 512 /* ValueModule */ && parentSymbol.valueDeclaration.kind === 256 /* SourceFile */) {
-                            var symbolFile = parentSymbol.valueDeclaration;
-                            var referenceFile = ts.getSourceFileOfNode(node);
-                            // If `node` accesses an export and that export isn't in the same file, then symbol is a namespace export, so return undefined.
-                            var symbolIsUmdExport = symbolFile !== referenceFile;
-                            return symbolIsUmdExport ? undefined : symbolFile;
-                        }
-                        for (var n = node.parent; n; n = n.parent) {
-                            if (ts.isModuleOrEnumDeclaration(n) && getSymbolOfNode(n) === parentSymbol) {
-                                return n;
-                            }
+                };
+                setPropertyInRawIfNotUndefined("include");
+                setPropertyInRawIfNotUndefined("exclude");
+                setPropertyInRawIfNotUndefined("files");
+                if (raw_1.compileOnSave === undefined) {
+                    raw_1.compileOnSave = baseRaw_1.compileOnSave;
+                }
+                ownConfig.options = ts.assign({}, extendedConfig.options, ownConfig.options);
+                // TODO extend type typeAcquisition
+            }
+        }
+        return ownConfig;
+    }
+    function parseOwnConfigOfJson(json, host, basePath, getCanonicalFileName, configFileName, errors) {
+        if (ts.hasProperty(json, "excludes")) {
+            errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unknown_option_excludes_Did_you_mean_exclude));
+        }
+        var options = convertCompilerOptionsFromJsonWorker(json.compilerOptions, basePath, errors, configFileName);
+        // typingOptions has been deprecated and is only supported for backward compatibility purposes.
+        // It should be removed in future releases - use typeAcquisition instead.
+        var typeAcquisition = convertTypeAcquisitionFromJsonWorker(json["typeAcquisition"] || json["typingOptions"], basePath, errors, configFileName);
+        json.compileOnSave = convertCompileOnSaveOptionFromJson(json, basePath, errors);
+        var extendedConfigPath;
+        if (json.extends) {
+            if (typeof json.extends !== "string") {
+                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1, "extends", "string"));
+            }
+            else {
+                extendedConfigPath = getExtendsConfigPath(json.extends, host, basePath, getCanonicalFileName, errors, ts.createCompilerDiagnostic);
+            }
+        }
+        return { raw: json, options: options, typeAcquisition: typeAcquisition, extendedConfigPath: extendedConfigPath };
+    }
+    function parseOwnConfigOfJsonSourceFile(sourceFile, host, basePath, getCanonicalFileName, configFileName, errors) {
+        var options = getDefaultCompilerOptions(configFileName);
+        var typeAcquisition, typingOptionstypeAcquisition;
+        var extendedConfigPath;
+        var optionsIterator = {
+            onSetValidOptionKeyValueInParent: function (parentOption, option, value) {
+                ts.Debug.assert(parentOption === "compilerOptions" || parentOption === "typeAcquisition" || parentOption === "typingOptions");
+                var currentOption = parentOption === "compilerOptions" ?
+                    options :
+                    parentOption === "typeAcquisition" ?
+                        (typeAcquisition || (typeAcquisition = getDefaultTypeAcquisition(configFileName))) :
+                        (typingOptionstypeAcquisition || (typingOptionstypeAcquisition = getDefaultTypeAcquisition(configFileName)));
+                currentOption[option.name] = normalizeOptionValue(option, basePath, value);
+            },
+            onSetValidOptionKeyValueInRoot: function (key, _keyNode, value, valueNode) {
+                switch (key) {
+                    case "extends":
+                        extendedConfigPath = getExtendsConfigPath(value, host, basePath, getCanonicalFileName, errors, function (message, arg0) {
+                            return ts.createDiagnosticForNodeInSourceFile(sourceFile, valueNode, message, arg0);
+                        });
+                        return;
+                    case "files":
+                        if (value.length === 0) {
+                            errors.push(ts.createDiagnosticForNodeInSourceFile(sourceFile, valueNode, ts.Diagnostics.The_files_list_in_config_file_0_is_empty, configFileName || "tsconfig.json"));
                         }
-                    }
+                        return;
                 }
-            }
-        }
-        // When resolved as an expression identifier, if the given node references an import, return the declaration of
-        // that import. Otherwise, return undefined.
-        function getReferencedImportDeclaration(node) {
-            node = ts.getParseTreeNode(node, ts.isIdentifier);
-            if (node) {
-                var symbol = getReferencedValueSymbol(node);
-                if (symbol && symbol.flags & 8388608 /* Alias */) {
-                    return getDeclarationOfAliasSymbol(symbol);
+            },
+            onSetUnknownOptionKeyValueInRoot: function (key, keyNode, _value, _valueNode) {
+                if (key === "excludes") {
+                    errors.push(ts.createDiagnosticForNodeInSourceFile(sourceFile, keyNode, ts.Diagnostics.Unknown_option_excludes_Did_you_mean_exclude));
                 }
             }
+        };
+        var json = convertToObjectWorker(sourceFile, errors, getTsconfigRootOptionsMap(), optionsIterator);
+        if (!typeAcquisition) {
+            if (typingOptionstypeAcquisition) {
+                typeAcquisition = (typingOptionstypeAcquisition.enableAutoDiscovery !== undefined) ?
+                    {
+                        enable: typingOptionstypeAcquisition.enableAutoDiscovery,
+                        include: typingOptionstypeAcquisition.include,
+                        exclude: typingOptionstypeAcquisition.exclude
+                    } :
+                    typingOptionstypeAcquisition;
+            }
+            else {
+                typeAcquisition = getDefaultTypeAcquisition(configFileName);
+            }
+        }
+        return { raw: json, options: options, typeAcquisition: typeAcquisition, extendedConfigPath: extendedConfigPath };
+    }
+    function getExtendsConfigPath(extendedConfig, host, basePath, getCanonicalFileName, errors, createDiagnostic) {
+        extendedConfig = ts.normalizeSlashes(extendedConfig);
+        // If the path isn't a rooted or relative path, don't try to resolve it (we reserve the right to special case module-id like paths in the future)
+        if (!(ts.isRootedDiskPath(extendedConfig) || ts.startsWith(extendedConfig, "./") || ts.startsWith(extendedConfig, "../"))) {
+            errors.push(createDiagnostic(ts.Diagnostics.A_path_in_an_extends_option_must_be_relative_or_rooted_but_0_is_not, extendedConfig));
             return undefined;
         }
-        function isSymbolOfDeclarationWithCollidingName(symbol) {
-            if (symbol.flags & 418 /* BlockScoped */) {
-                var links = getSymbolLinks(symbol);
-                if (links.isDeclarationWithCollidingName === undefined) {
-                    var container = ts.getEnclosingBlockScopeContainer(symbol.valueDeclaration);
-                    if (ts.isStatementWithLocals(container)) {
-                        var nodeLinks_1 = getNodeLinks(symbol.valueDeclaration);
-                        if (!!resolveName(container.parent, symbol.name, 107455 /* Value */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined)) {
-                            // redeclaration - always should be renamed
-                            links.isDeclarationWithCollidingName = true;
-                        }
-                        else if (nodeLinks_1.flags & 131072 /* CapturedBlockScopedBinding */) {
-                            // binding is captured in the function
-                            // should be renamed if:
-                            // - binding is not top level - top level bindings never collide with anything
-                            // AND
-                            //   - binding is not declared in loop, should be renamed to avoid name reuse across siblings
-                            //     let a, b
-                            //     { let x = 1; a = () => x;  }
-                            //     { let x = 100; b = () => x; }
-                            //     console.log(a()); // should print '1'
-                            //     console.log(b()); // should print '100'
-                            //     OR
-                            //   - binding is declared inside loop but not in inside initializer of iteration statement or directly inside loop body
-                            //     * variables from initializer are passed to rewritten loop body as parameters so they are not captured directly
-                            //     * variables that are declared immediately in loop body will become top level variable after loop is rewritten and thus
-                            //       they will not collide with anything
-                            var isDeclaredInLoop = nodeLinks_1.flags & 262144 /* BlockScopedBindingInLoop */;
-                            var inLoopInitializer = ts.isIterationStatement(container, /*lookInLabeledStatements*/ false);
-                            var inLoopBodyBlock = container.kind === 199 /* Block */ && ts.isIterationStatement(container.parent, /*lookInLabeledStatements*/ false);
-                            links.isDeclarationWithCollidingName = !ts.isBlockScopedContainerTopLevel(container) && (!isDeclaredInLoop || (!inLoopInitializer && !inLoopBodyBlock));
-                        }
-                        else {
-                            links.isDeclarationWithCollidingName = false;
-                        }
-                    }
-                }
-                return links.isDeclarationWithCollidingName;
+        var extendedConfigPath = ts.toPath(extendedConfig, basePath, getCanonicalFileName);
+        if (!host.fileExists(extendedConfigPath) && !ts.endsWith(extendedConfigPath, ".json")) {
+            extendedConfigPath = extendedConfigPath + ".json";
+            if (!host.fileExists(extendedConfigPath)) {
+                errors.push(createDiagnostic(ts.Diagnostics.File_0_does_not_exist, extendedConfig));
+                return undefined;
             }
-            return false;
         }
-        // When resolved as an expression identifier, if the given node references a nested block scoped entity with
-        // a name that either hides an existing name or might hide it when compiled downlevel,
-        // return the declaration of that entity. Otherwise, return undefined.
-        function getReferencedDeclarationWithCollidingName(node) {
-            if (!ts.isGeneratedIdentifier(node)) {
-                node = ts.getParseTreeNode(node, ts.isIdentifier);
-                if (node) {
-                    var symbol = getReferencedValueSymbol(node);
-                    if (symbol && isSymbolOfDeclarationWithCollidingName(symbol)) {
-                        return symbol.valueDeclaration;
-                    }
-                }
-            }
+        return extendedConfigPath;
+    }
+    function getExtendedConfig(sourceFile, extendedConfigPath, host, basePath, getCanonicalFileName, resolutionStack, errors) {
+        var extendedResult = readJsonConfigFile(extendedConfigPath, function (path) { return host.readFile(path); });
+        if (sourceFile) {
+            (sourceFile.extendedSourceFiles || (sourceFile.extendedSourceFiles = [])).push(extendedResult.fileName);
+        }
+        if (extendedResult.parseDiagnostics.length) {
+            errors.push.apply(errors, extendedResult.parseDiagnostics);
             return undefined;
         }
-        // Return true if the given node is a declaration of a nested block scoped entity with a name that either hides an
-        // existing name or might hide a name when compiled downlevel
-        function isDeclarationWithCollidingName(node) {
-            node = ts.getParseTreeNode(node, ts.isDeclaration);
-            if (node) {
-                var symbol = getSymbolOfNode(node);
-                if (symbol) {
-                    return isSymbolOfDeclarationWithCollidingName(symbol);
+        var extendedDirname = ts.getDirectoryPath(extendedConfigPath);
+        var extendedConfig = parseConfig(/*json*/ undefined, extendedResult, host, extendedDirname, ts.getBaseFileName(extendedConfigPath), resolutionStack, errors);
+        if (sourceFile) {
+            (_a = sourceFile.extendedSourceFiles).push.apply(_a, extendedResult.extendedSourceFiles);
+        }
+        if (isSuccessfulParsedTsconfig(extendedConfig)) {
+            // Update the paths to reflect base path
+            var relativeDifference_1 = ts.convertToRelativePath(extendedDirname, basePath, getCanonicalFileName);
+            var updatePath_1 = function (path) { return ts.isRootedDiskPath(path) ? path : ts.combinePaths(relativeDifference_1, path); };
+            var mapPropertiesInRawIfNotUndefined = function (propertyName) {
+                if (raw_2[propertyName]) {
+                    raw_2[propertyName] = ts.map(raw_2[propertyName], updatePath_1);
                 }
+            };
+            var raw_2 = extendedConfig.raw;
+            mapPropertiesInRawIfNotUndefined("include");
+            mapPropertiesInRawIfNotUndefined("exclude");
+            mapPropertiesInRawIfNotUndefined("files");
+        }
+        return extendedConfig;
+        var _a;
+    }
+    function convertCompileOnSaveOptionFromJson(jsonOption, basePath, errors) {
+        if (!ts.hasProperty(jsonOption, ts.compileOnSaveCommandLineOption.name)) {
+            return undefined;
+        }
+        var result = convertJsonOption(ts.compileOnSaveCommandLineOption, jsonOption["compileOnSave"], basePath, errors);
+        if (typeof result === "boolean" && result) {
+            return result;
+        }
+        return false;
+    }
+    function convertCompilerOptionsFromJson(jsonOptions, basePath, configFileName) {
+        var errors = [];
+        var options = convertCompilerOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName);
+        return { options: options, errors: errors };
+    }
+    ts.convertCompilerOptionsFromJson = convertCompilerOptionsFromJson;
+    function convertTypeAcquisitionFromJson(jsonOptions, basePath, configFileName) {
+        var errors = [];
+        var options = convertTypeAcquisitionFromJsonWorker(jsonOptions, basePath, errors, configFileName);
+        return { options: options, errors: errors };
+    }
+    ts.convertTypeAcquisitionFromJson = convertTypeAcquisitionFromJson;
+    function getDefaultCompilerOptions(configFileName) {
+        var options = ts.getBaseFileName(configFileName) === "jsconfig.json"
+            ? { allowJs: true, maxNodeModuleJsDepth: 2, allowSyntheticDefaultImports: true, skipLibCheck: true }
+            : {};
+        return options;
+    }
+    function convertCompilerOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName) {
+        var options = getDefaultCompilerOptions(configFileName);
+        convertOptionsFromJson(ts.optionDeclarations, jsonOptions, basePath, options, ts.Diagnostics.Unknown_compiler_option_0, errors);
+        return options;
+    }
+    function getDefaultTypeAcquisition(configFileName) {
+        var options = { enable: ts.getBaseFileName(configFileName) === "jsconfig.json", include: [], exclude: [] };
+        return options;
+    }
+    function convertTypeAcquisitionFromJsonWorker(jsonOptions, basePath, errors, configFileName) {
+        var options = getDefaultTypeAcquisition(configFileName);
+        var typeAcquisition = convertEnableAutoDiscoveryToEnable(jsonOptions);
+        convertOptionsFromJson(ts.typeAcquisitionDeclarations, typeAcquisition, basePath, options, ts.Diagnostics.Unknown_type_acquisition_option_0, errors);
+        return options;
+    }
+    function convertOptionsFromJson(optionDeclarations, jsonOptions, basePath, defaultOptions, diagnosticMessage, errors) {
+        if (!jsonOptions) {
+            return;
+        }
+        var optionNameMap = commandLineOptionsToMap(optionDeclarations);
+        for (var id in jsonOptions) {
+            var opt = optionNameMap.get(id);
+            if (opt) {
+                defaultOptions[opt.name] = convertJsonOption(opt, jsonOptions[id], basePath, errors);
+            }
+            else {
+                errors.push(ts.createCompilerDiagnostic(diagnosticMessage, id));
             }
-            return false;
         }
-        function isValueAliasDeclaration(node) {
-            node = ts.getParseTreeNode(node);
-            if (node === undefined) {
-                // A synthesized node comes from an emit transformation and is always a value.
-                return true;
+    }
+    function convertJsonOption(opt, value, basePath, errors) {
+        if (isCompilerOptionsValue(opt, value)) {
+            var optType = opt.type;
+            if (optType === "list" && ts.isArray(value)) {
+                return convertJsonOptionOfListType(opt, value, basePath, errors);
             }
-            switch (node.kind) {
-                case 229 /* ImportEqualsDeclaration */:
-                case 231 /* ImportClause */:
-                case 232 /* NamespaceImport */:
-                case 234 /* ImportSpecifier */:
-                case 238 /* ExportSpecifier */:
-                    return isAliasResolvedToValue(getSymbolOfNode(node) || unknownSymbol);
-                case 236 /* ExportDeclaration */:
-                    var exportClause = node.exportClause;
-                    return exportClause && ts.forEach(exportClause.elements, isValueAliasDeclaration);
-                case 235 /* ExportAssignment */:
-                    return node.expression
-                        && node.expression.kind === 69 /* Identifier */
-                        ? isAliasResolvedToValue(getSymbolOfNode(node) || unknownSymbol)
-                        : true;
+            else if (typeof optType !== "string") {
+                return convertJsonOptionOfCustomType(opt, value, errors);
             }
-            return false;
+            return normalizeNonListOptionValue(opt, basePath, value);
         }
-        function isTopLevelValueImportEqualsWithEntityName(node) {
-            node = ts.getParseTreeNode(node, ts.isImportEqualsDeclaration);
-            if (node === undefined || node.parent.kind !== 256 /* SourceFile */ || !ts.isInternalModuleImportEqualsDeclaration(node)) {
-                // parent is not source file or it is not reference to internal module
-                return false;
+        else {
+            errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1, opt.name, getCompilerOptionValueTypeString(opt)));
+        }
+    }
+    function normalizeOptionValue(option, basePath, value) {
+        if (option.type === "list") {
+            var listOption_1 = option;
+            if (listOption_1.element.isFilePath || typeof listOption_1.element.type !== "string") {
+                return ts.filter(ts.map(value, function (v) { return normalizeOptionValue(listOption_1.element, basePath, v); }), function (v) { return !!v; });
             }
-            var isValue = isAliasResolvedToValue(getSymbolOfNode(node));
-            return isValue && node.moduleReference && !ts.nodeIsMissing(node.moduleReference);
+            return value;
         }
-        function isAliasResolvedToValue(symbol) {
-            var target = resolveAlias(symbol);
-            if (target === unknownSymbol) {
-                return true;
+        else if (typeof option.type !== "string") {
+            return option.type.get(value);
+        }
+        return normalizeNonListOptionValue(option, basePath, value);
+    }
+    function normalizeNonListOptionValue(option, basePath, value) {
+        if (option.isFilePath) {
+            value = ts.normalizePath(ts.combinePaths(basePath, value));
+            if (value === "") {
+                value = ".";
             }
-            // const enums and modules that contain only const enums are not considered values from the emit perspective
-            // unless 'preserveConstEnums' option is set to true
-            return target.flags & 107455 /* Value */ &&
-                (compilerOptions.preserveConstEnums || !isConstEnumOrConstEnumOnlyModule(target));
         }
-        function isConstEnumOrConstEnumOnlyModule(s) {
-            return isConstEnumSymbol(s) || s.constEnumOnlyModule;
+        return value;
+    }
+    function convertJsonOptionOfCustomType(opt, value, errors) {
+        var key = value.toLowerCase();
+        var val = opt.type.get(key);
+        if (val !== undefined) {
+            return val;
         }
-        function isReferencedAliasDeclaration(node, checkChildren) {
-            node = ts.getParseTreeNode(node);
-            // Purely synthesized nodes are always emitted.
-            if (node === undefined) {
-                return true;
+        else {
+            errors.push(createCompilerDiagnosticForInvalidCustomType(opt));
+        }
+    }
+    function convertJsonOptionOfListType(option, values, basePath, errors) {
+        return ts.filter(ts.map(values, function (v) { return convertJsonOption(option.element, v, basePath, errors); }), function (v) { return !!v; });
+    }
+    function trimString(s) {
+        return typeof s.trim === "function" ? s.trim() : s.replace(/^[\s]+|[\s]+$/g, "");
+    }
+    /**
+     * Tests for a path that ends in a recursive directory wildcard.
+     * Matches **, \**, **\, and \**\, but not a**b.
+     *
+     * NOTE: used \ in place of / above to avoid issues with multiline comments.
+     *
+     * Breakdown:
+     *  (^|\/)      # matches either the beginning of the string or a directory separator.
+     *  \*\*        # matches the recursive directory wildcard "**".
+     *  \/?$        # matches an optional trailing directory separator at the end of the string.
+     */
+    var invalidTrailingRecursionPattern = /(^|\/)\*\*\/?$/;
+    /**
+     * Tests for a path with multiple recursive directory wildcards.
+     * Matches **\** and **\a\**, but not **\a**b.
+     *
+     * NOTE: used \ in place of / above to avoid issues with multiline comments.
+     *
+     * Breakdown:
+     *  (^|\/)      # matches either the beginning of the string or a directory separator.
+     *  \*\*\/      # matches a recursive directory wildcard "**" followed by a directory separator.
+     *  (.*\/)?     # optionally matches any number of characters followed by a directory separator.
+     *  \*\*        # matches a recursive directory wildcard "**"
+     *  ($|\/)      # matches either the end of the string or a directory separator.
+     */
+    var invalidMultipleRecursionPatterns = /(^|\/)\*\*\/(.*\/)?\*\*($|\/)/;
+    /**
+     * Tests for a path where .. appears after a recursive directory wildcard.
+     * Matches **\..\*, **\a\..\*, and **\.., but not ..\**\*
+     *
+     * NOTE: used \ in place of / above to avoid issues with multiline comments.
+     *
+     * Breakdown:
+     *  (^|\/)      # matches either the beginning of the string or a directory separator.
+     *  \*\*\/      # matches a recursive directory wildcard "**" followed by a directory separator.
+     *  (.*\/)?     # optionally matches any number of characters followed by a directory separator.
+     *  \.\.        # matches a parent directory path component ".."
+     *  ($|\/)      # matches either the end of the string or a directory separator.
+     */
+    var invalidDotDotAfterRecursiveWildcardPattern = /(^|\/)\*\*\/(.*\/)?\.\.($|\/)/;
+    /**
+     * Tests for a path containing a wildcard character in a directory component of the path.
+     * Matches \*\, \?\, and \a*b\, but not \a\ or \a\*.
+     *
+     * NOTE: used \ in place of / above to avoid issues with multiline comments.
+     *
+     * Breakdown:
+     *  \/          # matches a directory separator.
+     *  [^/]*?      # matches any number of characters excluding directory separators (non-greedy).
+     *  [*?]        # matches either a wildcard character (* or ?)
+     *  [^/]*       # matches any number of characters excluding directory separators (greedy).
+     *  \/          # matches a directory separator.
+     */
+    var watchRecursivePattern = /\/[^/]*?[*?][^/]*\//;
+    /**
+     * Matches the portion of a wildcard path that does not contain wildcards.
+     * Matches \a of \a\*, or \a\b\c of \a\b\c\?\d.
+     *
+     * NOTE: used \ in place of / above to avoid issues with multiline comments.
+     *
+     * Breakdown:
+     *  ^                   # matches the beginning of the string
+     *  [^*?]*              # matches any number of non-wildcard characters
+     *  (?=\/[^/]*[*?])     # lookahead that matches a directory separator followed by
+     *                      # a path component that contains at least one wildcard character (* or ?).
+     */
+    var wildcardDirectoryPattern = /^[^*?]*(?=\/[^/]*[*?])/;
+    /**
+     * Expands an array of file specifications.
+     *
+     * @param fileNames The literal file names to include.
+     * @param include The wildcard file specifications to include.
+     * @param exclude The wildcard file specifications to exclude.
+     * @param basePath The base path for any relative file specifications.
+     * @param options Compiler options.
+     * @param host The host used to resolve files and directories.
+     * @param errors An array for diagnostic reporting.
+     */
+    function matchFileNames(fileNames, include, exclude, basePath, options, host, errors, extraFileExtensions, jsonSourceFile) {
+        basePath = ts.normalizePath(basePath);
+        // The exclude spec list is converted into a regular expression, which allows us to quickly
+        // test whether a file or directory should be excluded before recursively traversing the
+        // file system.
+        var keyMapper = host.useCaseSensitiveFileNames ? caseSensitiveKeyMapper : caseInsensitiveKeyMapper;
+        // Literal file names (provided via the "files" array in tsconfig.json) are stored in a
+        // file map with a possibly case insensitive key. We use this map later when when including
+        // wildcard paths.
+        var literalFileMap = ts.createMap();
+        // Wildcard paths (provided via the "includes" array in tsconfig.json) are stored in a
+        // file map with a possibly case insensitive key. We use this map to store paths matched
+        // via wildcard, and to handle extension priority.
+        var wildcardFileMap = ts.createMap();
+        if (include) {
+            include = validateSpecs(include, errors, /*allowTrailingRecursion*/ false, jsonSourceFile, "include");
+        }
+        if (exclude) {
+            exclude = validateSpecs(exclude, errors, /*allowTrailingRecursion*/ true, jsonSourceFile, "exclude");
+        }
+        // Wildcard directories (provided as part of a wildcard path) are stored in a
+        // file map that marks whether it was a regular wildcard match (with a `*` or `?` token),
+        // or a recursive directory. This information is used by filesystem watchers to monitor for
+        // new entries in these paths.
+        var wildcardDirectories = getWildcardDirectories(include, exclude, basePath, host.useCaseSensitiveFileNames);
+        // Rather than requery this for each file and filespec, we query the supported extensions
+        // once and store it on the expansion context.
+        var supportedExtensions = ts.getSupportedExtensions(options, extraFileExtensions);
+        // Literal files are always included verbatim. An "include" or "exclude" specification cannot
+        // remove a literal file.
+        if (fileNames) {
+            for (var _i = 0, fileNames_1 = fileNames; _i < fileNames_1.length; _i++) {
+                var fileName = fileNames_1[_i];
+                var file = ts.combinePaths(basePath, fileName);
+                literalFileMap.set(keyMapper(file), file);
             }
-            if (ts.isAliasSymbolDeclaration(node)) {
-                var symbol = getSymbolOfNode(node);
-                if (symbol && getSymbolLinks(symbol).referenced) {
-                    return true;
+        }
+        if (include && include.length > 0) {
+            for (var _a = 0, _b = host.readDirectory(basePath, supportedExtensions, exclude, include); _a < _b.length; _a++) {
+                var file = _b[_a];
+                // If we have already included a literal or wildcard path with a
+                // higher priority extension, we should skip this file.
+                //
+                // This handles cases where we may encounter both <file>.ts and
+                // <file>.d.ts (or <file>.js if "allowJs" is enabled) in the same
+                // directory when they are compilation outputs.
+                if (hasFileWithHigherPriorityExtension(file, literalFileMap, wildcardFileMap, supportedExtensions, keyMapper)) {
+                    continue;
+                }
+                // We may have included a wildcard path with a lower priority
+                // extension due to the user-defined order of entries in the
+                // "include" array. If there is a lower priority extension in the
+                // same directory, we should remove it.
+                removeWildcardFilesWithLowerPriorityExtension(file, wildcardFileMap, supportedExtensions, keyMapper);
+                var key = keyMapper(file);
+                if (!literalFileMap.has(key) && !wildcardFileMap.has(key)) {
+                    wildcardFileMap.set(key, file);
                 }
             }
-            if (checkChildren) {
-                return ts.forEachChild(node, function (node) { return isReferencedAliasDeclaration(node, checkChildren); });
+        }
+        var literalFiles = ts.arrayFrom(literalFileMap.values());
+        var wildcardFiles = ts.arrayFrom(wildcardFileMap.values());
+        return {
+            fileNames: literalFiles.concat(wildcardFiles),
+            wildcardDirectories: wildcardDirectories
+        };
+    }
+    function validateSpecs(specs, errors, allowTrailingRecursion, jsonSourceFile, specKey) {
+        var validSpecs = [];
+        for (var _i = 0, specs_1 = specs; _i < specs_1.length; _i++) {
+            var spec = specs_1[_i];
+            if (!allowTrailingRecursion && invalidTrailingRecursionPattern.test(spec)) {
+                errors.push(createDiagnostic(ts.Diagnostics.File_specification_cannot_end_in_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0, spec));
+            }
+            else if (invalidMultipleRecursionPatterns.test(spec)) {
+                errors.push(createDiagnostic(ts.Diagnostics.File_specification_cannot_contain_multiple_recursive_directory_wildcards_Asterisk_Asterisk_Colon_0, spec));
+            }
+            else if (invalidDotDotAfterRecursiveWildcardPattern.test(spec)) {
+                errors.push(createDiagnostic(ts.Diagnostics.File_specification_cannot_contain_a_parent_directory_that_appears_after_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0, spec));
+            }
+            else {
+                validSpecs.push(spec);
             }
-            return false;
         }
-        function isImplementationOfOverload(node) {
-            if (ts.nodeIsPresent(node.body)) {
-                var symbol = getSymbolOfNode(node);
-                var signaturesOfSymbol = getSignaturesOfSymbol(symbol);
-                // If this function body corresponds to function with multiple signature, it is implementation of overload
-                // e.g.: function foo(a: string): string;
-                //       function foo(a: number): number;
-                //       function foo(a: any) { // This is implementation of the overloads
-                //           return a;
-                //       }
-                return signaturesOfSymbol.length > 1 ||
-                    // If there is single signature for the symbol, it is overload if that signature isn't coming from the node
-                    // e.g.: function foo(a: string): string;
-                    //       function foo(a: any) { // This is implementation of the overloads
-                    //           return a;
-                    //       }
-                    (signaturesOfSymbol.length === 1 && signaturesOfSymbol[0].declaration !== node);
+        return validSpecs;
+        function createDiagnostic(message, spec) {
+            if (jsonSourceFile && jsonSourceFile.jsonObject) {
+                for (var _i = 0, _a = ts.getPropertyAssignment(jsonSourceFile.jsonObject, specKey); _i < _a.length; _i++) {
+                    var property = _a[_i];
+                    if (ts.isArrayLiteralExpression(property.initializer)) {
+                        for (var _b = 0, _c = property.initializer.elements; _b < _c.length; _b++) {
+                            var element = _c[_b];
+                            if (element.kind === 9 /* StringLiteral */ && element.text === spec) {
+                                return ts.createDiagnosticForNodeInSourceFile(jsonSourceFile, element, message, spec);
+                            }
+                        }
+                    }
+                }
             }
-            return false;
+            return ts.createCompilerDiagnostic(message, spec);
         }
-        function getNodeCheckFlags(node) {
-            node = ts.getParseTreeNode(node);
-            return node ? getNodeLinks(node).flags : undefined;
+    }
+    /**
+     * Gets directories in a set of include patterns that should be watched for changes.
+     */
+    function getWildcardDirectories(include, exclude, path, useCaseSensitiveFileNames) {
+        // We watch a directory recursively if it contains a wildcard anywhere in a directory segment
+        // of the pattern:
+        //
+        //  /a/b/**/d   - Watch /a/b recursively to catch changes to any d in any subfolder recursively
+        //  /a/b/*/d    - Watch /a/b recursively to catch any d in any immediate subfolder, even if a new subfolder is added
+        //  /a/b        - Watch /a/b recursively to catch changes to anything in any recursive subfoler
+        //
+        // We watch a directory without recursion if it contains a wildcard in the file segment of
+        // the pattern:
+        //
+        //  /a/b/*      - Watch /a/b directly to catch any new file
+        //  /a/b/a?z    - Watch /a/b directly to catch any new file matching a?z
+        var rawExcludeRegex = ts.getRegularExpressionForWildcard(exclude, path, "exclude");
+        var excludeRegex = rawExcludeRegex && new RegExp(rawExcludeRegex, useCaseSensitiveFileNames ? "" : "i");
+        var wildcardDirectories = {};
+        if (include !== undefined) {
+            var recursiveKeys = [];
+            for (var _i = 0, include_1 = include; _i < include_1.length; _i++) {
+                var file = include_1[_i];
+                var spec = ts.normalizePath(ts.combinePaths(path, file));
+                if (excludeRegex && excludeRegex.test(spec)) {
+                    continue;
+                }
+                var match = getWildcardDirectoryFromSpec(spec, useCaseSensitiveFileNames);
+                if (match) {
+                    var key = match.key, flags = match.flags;
+                    var existingFlags = wildcardDirectories[key];
+                    if (existingFlags === undefined || existingFlags < flags) {
+                        wildcardDirectories[key] = flags;
+                        if (flags === 1 /* Recursive */) {
+                            recursiveKeys.push(key);
+                        }
+                    }
+                }
+            }
+            // Remove any subpaths under an existing recursively watched directory.
+            for (var key in wildcardDirectories) {
+                if (ts.hasProperty(wildcardDirectories, key)) {
+                    for (var _a = 0, recursiveKeys_1 = recursiveKeys; _a < recursiveKeys_1.length; _a++) {
+                        var recursiveKey = recursiveKeys_1[_a];
+                        if (key !== recursiveKey && ts.containsPath(recursiveKey, key, path, !useCaseSensitiveFileNames)) {
+                            delete wildcardDirectories[key];
+                        }
+                    }
+                }
+            }
+        }
+        return wildcardDirectories;
+    }
+    function getWildcardDirectoryFromSpec(spec, useCaseSensitiveFileNames) {
+        var match = wildcardDirectoryPattern.exec(spec);
+        if (match) {
+            return {
+                key: useCaseSensitiveFileNames ? match[0] : match[0].toLowerCase(),
+                flags: watchRecursivePattern.test(spec) ? 1 /* Recursive */ : 0 /* None */
+            };
         }
-        function getEnumMemberValue(node) {
-            computeEnumMemberValues(node.parent);
-            return getNodeLinks(node).enumMemberValue;
+        if (ts.isImplicitGlob(spec)) {
+            return { key: spec, flags: 1 /* Recursive */ };
         }
-        function getConstantValue(node) {
-            if (node.kind === 255 /* EnumMember */) {
-                return getEnumMemberValue(node);
+        return undefined;
+    }
+    /**
+     * Determines whether a literal or wildcard file has already been included that has a higher
+     * extension priority.
+     *
+     * @param file The path to the file.
+     * @param extensionPriority The priority of the extension.
+     * @param context The expansion context.
+     */
+    function hasFileWithHigherPriorityExtension(file, literalFiles, wildcardFiles, extensions, keyMapper) {
+        var extensionPriority = ts.getExtensionPriority(file, extensions);
+        var adjustedExtensionPriority = ts.adjustExtensionPriority(extensionPriority, extensions);
+        for (var i = 0 /* Highest */; i < adjustedExtensionPriority; i++) {
+            var higherPriorityExtension = extensions[i];
+            var higherPriorityPath = keyMapper(ts.changeExtension(file, higherPriorityExtension));
+            if (literalFiles.has(higherPriorityPath) || wildcardFiles.has(higherPriorityPath)) {
+                return true;
             }
-            var symbol = getNodeLinks(node).resolvedSymbol;
-            if (symbol && (symbol.flags & 8 /* EnumMember */)) {
-                // inline property\index accesses only for const enums
-                if (ts.isConstEnumDeclaration(symbol.valueDeclaration.parent)) {
-                    return getEnumMemberValue(symbol.valueDeclaration);
+        }
+        return false;
+    }
+    /**
+     * Removes files included via wildcard expansion with a lower extension priority that have
+     * already been included.
+     *
+     * @param file The path to the file.
+     * @param extensionPriority The priority of the extension.
+     * @param context The expansion context.
+     */
+    function removeWildcardFilesWithLowerPriorityExtension(file, wildcardFiles, extensions, keyMapper) {
+        var extensionPriority = ts.getExtensionPriority(file, extensions);
+        var nextExtensionPriority = ts.getNextLowestExtensionPriority(extensionPriority, extensions);
+        for (var i = nextExtensionPriority; i < extensions.length; i++) {
+            var lowerPriorityExtension = extensions[i];
+            var lowerPriorityPath = keyMapper(ts.changeExtension(file, lowerPriorityExtension));
+            wildcardFiles.delete(lowerPriorityPath);
+        }
+    }
+    /**
+     * Gets a case sensitive key.
+     *
+     * @param key The original key.
+     */
+    function caseSensitiveKeyMapper(key) {
+        return key;
+    }
+    /**
+     * Gets a case insensitive key.
+     *
+     * @param key The original key.
+     */
+    function caseInsensitiveKeyMapper(key) {
+        return key.toLowerCase();
+    }
+    /**
+     * Produces a cleaned version of compiler options with personally identifiying info (aka, paths) removed.
+     * Also converts enum values back to strings.
+     */
+    /* @internal */
+    function convertCompilerOptionsForTelemetry(opts) {
+        var out = {};
+        for (var key in opts) {
+            if (opts.hasOwnProperty(key)) {
+                var type = getOptionFromName(key);
+                if (type !== undefined) {
+                    out[key] = getOptionValueWithEmptyStrings(opts[key], type);
                 }
             }
-            return undefined;
         }
-        function isFunctionType(type) {
-            return type.flags & 2588672 /* ObjectType */ && getSignaturesOfType(type, 0 /* Call */).length > 0;
+        return out;
+    }
+    ts.convertCompilerOptionsForTelemetry = convertCompilerOptionsForTelemetry;
+    function getOptionValueWithEmptyStrings(value, option) {
+        switch (option.type) {
+            case "object":
+                return "";
+            case "string":
+                return "";
+            case "number":
+                return typeof value === "number" ? value : "";
+            case "boolean":
+                return typeof value === "boolean" ? value : "";
+            case "list":
+                var elementType_1 = option.element;
+                return ts.isArray(value) ? value.map(function (v) { return getOptionValueWithEmptyStrings(v, elementType_1); }) : "";
+            default:
+                return ts.forEachEntry(option.type, function (optionEnumValue, optionStringValue) {
+                    if (optionEnumValue === value) {
+                        return optionStringValue;
+                    }
+                });
         }
-        function getTypeReferenceSerializationKind(typeName, location) {
-            // Resolve the symbol as a value to ensure the type can be reached at runtime during emit.
-            var valueSymbol = resolveEntityName(typeName, 107455 /* Value */, /*ignoreErrors*/ true, /*dontResolveAlias*/ false, location);
-            var globalPromiseSymbol = tryGetGlobalPromiseConstructorSymbol();
-            if (globalPromiseSymbol && valueSymbol === globalPromiseSymbol) {
-                return ts.TypeReferenceSerializationKind.Promise;
-            }
-            var constructorType = valueSymbol ? getTypeOfSymbol(valueSymbol) : undefined;
-            if (constructorType && isConstructorType(constructorType)) {
-                return ts.TypeReferenceSerializationKind.TypeWithConstructSignatureAndValue;
-            }
-            // Resolve the symbol as a type so that we can provide a more useful hint for the type serializer.
-            var typeSymbol = resolveEntityName(typeName, 793064 /* Type */, /*ignoreErrors*/ true, /*dontResolveAlias*/ false, location);
-            // We might not be able to resolve type symbol so use unknown type in that case (eg error case)
-            if (!typeSymbol) {
-                return ts.TypeReferenceSerializationKind.ObjectType;
-            }
-            var type = getDeclaredTypeOfSymbol(typeSymbol);
-            if (type === unknownType) {
-                return ts.TypeReferenceSerializationKind.Unknown;
-            }
-            else if (type.flags & 1 /* Any */) {
-                return ts.TypeReferenceSerializationKind.ObjectType;
-            }
-            else if (isTypeOfKind(type, 1024 /* Void */ | 6144 /* Nullable */ | 8192 /* Never */)) {
-                return ts.TypeReferenceSerializationKind.VoidNullableOrNeverType;
-            }
-            else if (isTypeOfKind(type, 136 /* BooleanLike */)) {
-                return ts.TypeReferenceSerializationKind.BooleanType;
-            }
-            else if (isTypeOfKind(type, 340 /* NumberLike */)) {
-                return ts.TypeReferenceSerializationKind.NumberLikeType;
-            }
-            else if (isTypeOfKind(type, 34 /* StringLike */)) {
-                return ts.TypeReferenceSerializationKind.StringLikeType;
+    }
+})(ts || (ts = {}));
+/// <reference path="checker.ts"/>
+/* @internal */
+var ts;
+(function (ts) {
+    function getDeclarationDiagnostics(host, resolver, targetSourceFile) {
+        var declarationDiagnostics = ts.createDiagnosticCollection();
+        ts.forEachEmittedFile(host, getDeclarationDiagnosticsFromFile, targetSourceFile);
+        return declarationDiagnostics.getDiagnostics(targetSourceFile ? targetSourceFile.fileName : undefined);
+        function getDeclarationDiagnosticsFromFile(_a, sourceFileOrBundle) {
+            var declarationFilePath = _a.declarationFilePath;
+            emitDeclarations(host, resolver, declarationDiagnostics, declarationFilePath, sourceFileOrBundle, /*emitOnlyDtsFiles*/ false);
+        }
+    }
+    ts.getDeclarationDiagnostics = getDeclarationDiagnostics;
+    function emitDeclarations(host, resolver, emitterDiagnostics, declarationFilePath, sourceFileOrBundle, emitOnlyDtsFiles) {
+        var sourceFiles = sourceFileOrBundle.kind === 266 /* Bundle */ ? sourceFileOrBundle.sourceFiles : [sourceFileOrBundle];
+        var isBundledEmit = sourceFileOrBundle.kind === 266 /* Bundle */;
+        var newLine = host.getNewLine();
+        var compilerOptions = host.getCompilerOptions();
+        var write;
+        var writeLine;
+        var increaseIndent;
+        var decreaseIndent;
+        var writeTextOfNode;
+        var writer;
+        createAndSetNewTextWriterWithSymbolWriter();
+        var enclosingDeclaration;
+        var resultHasExternalModuleIndicator;
+        var currentText;
+        var currentLineMap;
+        var currentIdentifiers;
+        var isCurrentFileExternalModule;
+        var reportedDeclarationError = false;
+        var errorNameNode;
+        var emitJsDocComments = compilerOptions.removeComments ? ts.noop : writeJsDocComments;
+        var emit = compilerOptions.stripInternal ? stripInternal : emitNode;
+        var needsDeclare = true;
+        var moduleElementDeclarationEmitInfo = [];
+        var asynchronousSubModuleDeclarationEmitInfo;
+        // Contains the reference paths that needs to go in the declaration file.
+        // Collecting this separately because reference paths need to be first thing in the declaration file
+        // and we could be collecting these paths from multiple files into single one with --out option
+        var referencesOutput = "";
+        var usedTypeDirectiveReferences;
+        // Emit references corresponding to each file
+        var emittedReferencedFiles = [];
+        var addedGlobalFileReference = false;
+        var allSourcesModuleElementDeclarationEmitInfo = [];
+        ts.forEach(sourceFiles, function (sourceFile) {
+            // Dont emit for javascript file
+            if (ts.isSourceFileJavaScript(sourceFile)) {
+                return;
             }
-            else if (isTupleType(type)) {
-                return ts.TypeReferenceSerializationKind.ArrayLikeType;
+            // Check what references need to be added
+            if (!compilerOptions.noResolve) {
+                ts.forEach(sourceFile.referencedFiles, function (fileReference) {
+                    var referencedFile = ts.tryResolveScriptReference(host, sourceFile, fileReference);
+                    // Emit reference in dts, if the file reference was not already emitted
+                    if (referencedFile && !ts.contains(emittedReferencedFiles, referencedFile)) {
+                        // Add a reference to generated dts file,
+                        // global file reference is added only
+                        //  - if it is not bundled emit (because otherwise it would be self reference)
+                        //  - and it is not already added
+                        if (writeReferencePath(referencedFile, !isBundledEmit && !addedGlobalFileReference, emitOnlyDtsFiles)) {
+                            addedGlobalFileReference = true;
+                        }
+                        emittedReferencedFiles.push(referencedFile);
+                    }
+                });
             }
-            else if (isTypeOfKind(type, 512 /* ESSymbol */)) {
-                return ts.TypeReferenceSerializationKind.ESSymbolType;
+            resultHasExternalModuleIndicator = false;
+            if (!isBundledEmit || !ts.isExternalModule(sourceFile)) {
+                needsDeclare = true;
+                emitSourceFile(sourceFile);
             }
-            else if (isFunctionType(type)) {
-                return ts.TypeReferenceSerializationKind.TypeWithCallSignature;
+            else if (ts.isExternalModule(sourceFile)) {
+                needsDeclare = false;
+                write("declare module \"" + ts.getResolvedExternalModuleName(host, sourceFile) + "\" {");
+                writeLine();
+                increaseIndent();
+                emitSourceFile(sourceFile);
+                decreaseIndent();
+                write("}");
+                writeLine();
             }
-            else if (isArrayType(type)) {
-                return ts.TypeReferenceSerializationKind.ArrayLikeType;
+            // create asynchronous output for the importDeclarations
+            if (moduleElementDeclarationEmitInfo.length) {
+                var oldWriter = writer;
+                ts.forEach(moduleElementDeclarationEmitInfo, function (aliasEmitInfo) {
+                    if (aliasEmitInfo.isVisible && !aliasEmitInfo.asynchronousOutput) {
+                        ts.Debug.assert(aliasEmitInfo.node.kind === 238 /* ImportDeclaration */);
+                        createAndSetNewTextWriterWithSymbolWriter();
+                        ts.Debug.assert(aliasEmitInfo.indent === 0 || (aliasEmitInfo.indent === 1 && isBundledEmit));
+                        for (var i = 0; i < aliasEmitInfo.indent; i++) {
+                            increaseIndent();
+                        }
+                        writeImportDeclaration(aliasEmitInfo.node);
+                        aliasEmitInfo.asynchronousOutput = writer.getText();
+                        for (var i = 0; i < aliasEmitInfo.indent; i++) {
+                            decreaseIndent();
+                        }
+                    }
+                });
+                setWriter(oldWriter);
+                allSourcesModuleElementDeclarationEmitInfo = allSourcesModuleElementDeclarationEmitInfo.concat(moduleElementDeclarationEmitInfo);
+                moduleElementDeclarationEmitInfo = [];
             }
-            else {
-                return ts.TypeReferenceSerializationKind.ObjectType;
+            if (!isBundledEmit && ts.isExternalModule(sourceFile) && sourceFile.moduleAugmentations.length && !resultHasExternalModuleIndicator) {
+                // if file was external module with augmentations - this fact should be preserved in .d.ts as well.
+                // in case if we didn't write any external module specifiers in .d.ts we need to emit something
+                // that will force compiler to think that this file is an external module - 'export {}' is a reasonable choice here.
+                write("export {};");
+                writeLine();
             }
+        });
+        if (usedTypeDirectiveReferences) {
+            ts.forEachKey(usedTypeDirectiveReferences, function (directive) {
+                referencesOutput += "/// <reference types=\"" + directive + "\" />" + newLine;
+            });
         }
-        function writeTypeOfDeclaration(declaration, enclosingDeclaration, flags, writer) {
-            // Get type of the symbol if this is the valid symbol otherwise get type at location
-            var symbol = getSymbolOfNode(declaration);
-            var type = symbol && !(symbol.flags & (2048 /* TypeLiteral */ | 131072 /* Signature */))
-                ? getWidenedLiteralType(getTypeOfSymbol(symbol))
-                : unknownType;
-            getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
-        }
-        function writeReturnTypeOfSignatureDeclaration(signatureDeclaration, enclosingDeclaration, flags, writer) {
-            var signature = getSignatureFromDeclaration(signatureDeclaration);
-            getSymbolDisplayBuilder().buildTypeDisplay(getReturnTypeOfSignature(signature), writer, enclosingDeclaration, flags);
-        }
-        function writeTypeOfExpression(expr, enclosingDeclaration, flags, writer) {
-            var type = getWidenedType(getTypeOfExpression(expr));
-            getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
-        }
-        function writeBaseConstructorTypeOfClass(node, enclosingDeclaration, flags, writer) {
-            var classType = getDeclaredTypeOfSymbol(getSymbolOfNode(node));
-            resolveBaseTypesOfClass(classType);
-            var baseType = classType.resolvedBaseTypes.length ? classType.resolvedBaseTypes[0] : unknownType;
-            getSymbolDisplayBuilder().buildTypeDisplay(baseType, writer, enclosingDeclaration, flags);
-        }
-        function hasGlobalName(name) {
-            return !!globals[name];
-        }
-        function getReferencedValueSymbol(reference, startInDeclarationContainer) {
-            var resolvedSymbol = getNodeLinks(reference).resolvedSymbol;
-            if (resolvedSymbol) {
-                return resolvedSymbol;
-            }
-            var location = reference;
-            if (startInDeclarationContainer) {
-                // When resolving the name of a declaration as a value, we need to start resolution
-                // at a point outside of the declaration.
-                var parent_14 = reference.parent;
-                if (ts.isDeclaration(parent_14) && reference === parent_14.name) {
-                    location = getDeclarationContainer(parent_14);
-                }
-            }
-            return resolveName(location, reference.text, 107455 /* Value */ | 1048576 /* ExportValue */ | 8388608 /* Alias */, /*nodeNotFoundMessage*/ undefined, /*nameArg*/ undefined);
+        return {
+            reportedDeclarationError: reportedDeclarationError,
+            moduleElementDeclarationEmitInfo: allSourcesModuleElementDeclarationEmitInfo,
+            synchronousDeclarationOutput: writer.getText(),
+            referencesOutput: referencesOutput,
+        };
+        function hasInternalAnnotation(range) {
+            var comment = currentText.substring(range.pos, range.end);
+            return comment.indexOf("@internal") >= 0;
         }
-        function getReferencedValueDeclaration(reference) {
-            if (!ts.isGeneratedIdentifier(reference)) {
-                reference = ts.getParseTreeNode(reference, ts.isIdentifier);
-                if (reference) {
-                    var symbol = getReferencedValueSymbol(reference);
-                    if (symbol) {
-                        return getExportSymbolOfValueSymbolIfExported(symbol).valueDeclaration;
-                    }
+        function stripInternal(node) {
+            if (node) {
+                var leadingCommentRanges = ts.getLeadingCommentRanges(currentText, node.pos);
+                if (ts.forEach(leadingCommentRanges, hasInternalAnnotation)) {
+                    return;
                 }
+                emitNode(node);
             }
-            return undefined;
         }
-        function isLiteralConstDeclaration(node) {
-            if (ts.isConst(node)) {
-                var type = getTypeOfSymbol(getSymbolOfNode(node));
-                return !!(type.flags & 96 /* StringOrNumberLiteral */ && type.flags & 16777216 /* FreshLiteral */);
-            }
-            return false;
+        function createAndSetNewTextWriterWithSymbolWriter() {
+            var writer = ts.createTextWriter(newLine);
+            writer.trackSymbol = trackSymbol;
+            writer.reportInaccessibleThisError = reportInaccessibleThisError;
+            writer.reportPrivateInBaseOfClassExpression = reportPrivateInBaseOfClassExpression;
+            writer.writeKeyword = writer.write;
+            writer.writeOperator = writer.write;
+            writer.writePunctuation = writer.write;
+            writer.writeSpace = writer.write;
+            writer.writeStringLiteral = writer.writeLiteral;
+            writer.writeParameter = writer.write;
+            writer.writeProperty = writer.write;
+            writer.writeSymbol = writer.write;
+            setWriter(writer);
         }
-        function writeLiteralConstValue(node, writer) {
-            var type = getTypeOfSymbol(getSymbolOfNode(node));
-            writer.writeStringLiteral(literalTypeToString(type));
+        function setWriter(newWriter) {
+            writer = newWriter;
+            write = newWriter.write;
+            writeTextOfNode = newWriter.writeTextOfNode;
+            writeLine = newWriter.writeLine;
+            increaseIndent = newWriter.increaseIndent;
+            decreaseIndent = newWriter.decreaseIndent;
         }
-        function createResolver() {
-            // this variable and functions that use it are deliberately moved here from the outer scope
-            // to avoid scope pollution
-            var resolvedTypeReferenceDirectives = host.getResolvedTypeReferenceDirectives();
-            var fileToDirective;
-            if (resolvedTypeReferenceDirectives) {
-                // populate reverse mapping: file path -> type reference directive that was resolved to this file
-                fileToDirective = ts.createFileMap();
-                for (var key in resolvedTypeReferenceDirectives) {
-                    var resolvedDirective = resolvedTypeReferenceDirectives[key];
-                    if (!resolvedDirective) {
-                        continue;
-                    }
-                    var file = host.getSourceFile(resolvedDirective.resolvedFileName);
-                    fileToDirective.set(file.path, key);
+        function writeAsynchronousModuleElements(nodes) {
+            var oldWriter = writer;
+            ts.forEach(nodes, function (declaration) {
+                var nodeToCheck;
+                if (declaration.kind === 226 /* VariableDeclaration */) {
+                    nodeToCheck = declaration.parent.parent;
                 }
-            }
-            return {
-                getReferencedExportContainer: getReferencedExportContainer,
-                getReferencedImportDeclaration: getReferencedImportDeclaration,
-                getReferencedDeclarationWithCollidingName: getReferencedDeclarationWithCollidingName,
-                isDeclarationWithCollidingName: isDeclarationWithCollidingName,
-                isValueAliasDeclaration: isValueAliasDeclaration,
-                hasGlobalName: hasGlobalName,
-                isReferencedAliasDeclaration: isReferencedAliasDeclaration,
-                getNodeCheckFlags: getNodeCheckFlags,
-                isTopLevelValueImportEqualsWithEntityName: isTopLevelValueImportEqualsWithEntityName,
-                isDeclarationVisible: isDeclarationVisible,
-                isImplementationOfOverload: isImplementationOfOverload,
-                writeTypeOfDeclaration: writeTypeOfDeclaration,
-                writeReturnTypeOfSignatureDeclaration: writeReturnTypeOfSignatureDeclaration,
-                writeTypeOfExpression: writeTypeOfExpression,
-                writeBaseConstructorTypeOfClass: writeBaseConstructorTypeOfClass,
-                isSymbolAccessible: isSymbolAccessible,
-                isEntityNameVisible: isEntityNameVisible,
-                getConstantValue: getConstantValue,
-                collectLinkedAliases: collectLinkedAliases,
-                getReferencedValueDeclaration: getReferencedValueDeclaration,
-                getTypeReferenceSerializationKind: getTypeReferenceSerializationKind,
-                isOptionalParameter: isOptionalParameter,
-                moduleExportsSomeValue: moduleExportsSomeValue,
-                isArgumentsLocalBinding: isArgumentsLocalBinding,
-                getExternalModuleFileFromDeclaration: getExternalModuleFileFromDeclaration,
-                getTypeReferenceDirectivesForEntityName: getTypeReferenceDirectivesForEntityName,
-                getTypeReferenceDirectivesForSymbol: getTypeReferenceDirectivesForSymbol,
-                isLiteralConstDeclaration: isLiteralConstDeclaration,
-                writeLiteralConstValue: writeLiteralConstValue
-            };
-            // defined here to avoid outer scope pollution
-            function getTypeReferenceDirectivesForEntityName(node) {
-                // program does not have any files with type reference directives - bail out
-                if (!fileToDirective) {
-                    return undefined;
+                else if (declaration.kind === 241 /* NamedImports */ || declaration.kind === 242 /* ImportSpecifier */ || declaration.kind === 239 /* ImportClause */) {
+                    ts.Debug.fail("We should be getting ImportDeclaration instead to write");
                 }
-                // property access can only be used as values
-                // qualified names can only be used as types\namespaces
-                // identifiers are treated as values only if they appear in type queries
-                var meaning = (node.kind === 172 /* PropertyAccessExpression */) || (node.kind === 69 /* Identifier */ && isInTypeQuery(node))
-                    ? 107455 /* Value */ | 1048576 /* ExportValue */
-                    : 793064 /* Type */ | 1920 /* Namespace */;
-                var symbol = resolveEntityName(node, meaning, /*ignoreErrors*/ true);
-                return symbol && symbol !== unknownSymbol ? getTypeReferenceDirectivesForSymbol(symbol, meaning) : undefined;
-            }
-            // defined here to avoid outer scope pollution
-            function getTypeReferenceDirectivesForSymbol(symbol, meaning) {
-                // program does not have any files with type reference directives - bail out
-                if (!fileToDirective) {
-                    return undefined;
+                else {
+                    nodeToCheck = declaration;
                 }
-                if (!isSymbolFromTypeDeclarationFile(symbol)) {
-                    return undefined;
+                var moduleElementEmitInfo = ts.forEach(moduleElementDeclarationEmitInfo, function (declEmitInfo) { return declEmitInfo.node === nodeToCheck ? declEmitInfo : undefined; });
+                if (!moduleElementEmitInfo && asynchronousSubModuleDeclarationEmitInfo) {
+                    moduleElementEmitInfo = ts.forEach(asynchronousSubModuleDeclarationEmitInfo, function (declEmitInfo) { return declEmitInfo.node === nodeToCheck ? declEmitInfo : undefined; });
                 }
-                // check what declarations in the symbol can contribute to the target meaning
-                var typeReferenceDirectives;
-                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                    var decl = _a[_i];
-                    // check meaning of the local symbol to see if declaration needs to be analyzed further
-                    if (decl.symbol && decl.symbol.flags & meaning) {
-                        var file = ts.getSourceFileOfNode(decl);
-                        var typeReferenceDirective = fileToDirective.get(file.path);
-                        if (typeReferenceDirective) {
-                            (typeReferenceDirectives || (typeReferenceDirectives = [])).push(typeReferenceDirective);
+                // If the alias was marked as not visible when we saw its declaration, we would have saved the aliasEmitInfo, but if we haven't yet visited the alias declaration
+                // then we don't need to write it at this point. We will write it when we actually see its declaration
+                // Eg.
+                // export function bar(a: foo.Foo) { }
+                // import foo = require("foo");
+                // Writing of function bar would mark alias declaration foo as visible but we haven't yet visited that declaration so do nothing,
+                // we would write alias foo declaration when we visit it since it would now be marked as visible
+                if (moduleElementEmitInfo) {
+                    if (moduleElementEmitInfo.node.kind === 238 /* ImportDeclaration */) {
+                        // we have to create asynchronous output only after we have collected complete information
+                        // because it is possible to enable multiple bindings as asynchronously visible
+                        moduleElementEmitInfo.isVisible = true;
+                    }
+                    else {
+                        createAndSetNewTextWriterWithSymbolWriter();
+                        for (var declarationIndent = moduleElementEmitInfo.indent; declarationIndent; declarationIndent--) {
+                            increaseIndent();
+                        }
+                        if (nodeToCheck.kind === 233 /* ModuleDeclaration */) {
+                            ts.Debug.assert(asynchronousSubModuleDeclarationEmitInfo === undefined);
+                            asynchronousSubModuleDeclarationEmitInfo = [];
+                        }
+                        writeModuleElement(nodeToCheck);
+                        if (nodeToCheck.kind === 233 /* ModuleDeclaration */) {
+                            moduleElementEmitInfo.subModuleElementDeclarationEmitInfo = asynchronousSubModuleDeclarationEmitInfo;
+                            asynchronousSubModuleDeclarationEmitInfo = undefined;
                         }
+                        moduleElementEmitInfo.asynchronousOutput = writer.getText();
                     }
                 }
-                return typeReferenceDirectives;
+            });
+            setWriter(oldWriter);
+        }
+        function recordTypeReferenceDirectivesIfNecessary(typeReferenceDirectives) {
+            if (!typeReferenceDirectives) {
+                return;
             }
-            function isSymbolFromTypeDeclarationFile(symbol) {
-                // bail out if symbol does not have associated declarations (i.e. this is transient symbol created for property in binding pattern)
-                if (!symbol.declarations) {
-                    return false;
+            if (!usedTypeDirectiveReferences) {
+                usedTypeDirectiveReferences = ts.createMap();
+            }
+            for (var _i = 0, typeReferenceDirectives_1 = typeReferenceDirectives; _i < typeReferenceDirectives_1.length; _i++) {
+                var directive = typeReferenceDirectives_1[_i];
+                if (!usedTypeDirectiveReferences.has(directive)) {
+                    usedTypeDirectiveReferences.set(directive, directive);
                 }
-                // walk the parent chain for symbols to make sure that top level parent symbol is in the global scope
-                // external modules cannot define or contribute to type declaration files
-                var current = symbol;
-                while (true) {
-                    var parent_15 = getParentOfSymbol(current);
-                    if (parent_15) {
-                        current = parent_15;
+            }
+        }
+        function handleSymbolAccessibilityError(symbolAccessibilityResult) {
+            if (symbolAccessibilityResult.accessibility === 0 /* Accessible */) {
+                // write the aliases
+                if (symbolAccessibilityResult && symbolAccessibilityResult.aliasesToMakeVisible) {
+                    writeAsynchronousModuleElements(symbolAccessibilityResult.aliasesToMakeVisible);
+                }
+            }
+            else {
+                // Report error
+                reportedDeclarationError = true;
+                var errorInfo = writer.getSymbolAccessibilityDiagnostic(symbolAccessibilityResult);
+                if (errorInfo) {
+                    if (errorInfo.typeName) {
+                        emitterDiagnostics.add(ts.createDiagnosticForNode(symbolAccessibilityResult.errorNode || errorInfo.errorNode, errorInfo.diagnosticMessage, ts.getTextOfNodeFromSourceText(currentText, errorInfo.typeName), symbolAccessibilityResult.errorSymbolName, symbolAccessibilityResult.errorModuleName));
                     }
                     else {
-                        break;
-                    }
-                }
-                if (current.valueDeclaration && current.valueDeclaration.kind === 256 /* SourceFile */ && current.flags & 512 /* ValueModule */) {
-                    return false;
-                }
-                // check that at least one declaration of top level symbol originates from type declaration file
-                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                    var decl = _a[_i];
-                    var file = ts.getSourceFileOfNode(decl);
-                    if (fileToDirective.contains(file.path)) {
-                        return true;
+                        emitterDiagnostics.add(ts.createDiagnosticForNode(symbolAccessibilityResult.errorNode || errorInfo.errorNode, errorInfo.diagnosticMessage, symbolAccessibilityResult.errorSymbolName, symbolAccessibilityResult.errorModuleName));
                     }
                 }
-                return false;
             }
         }
-        function getExternalModuleFileFromDeclaration(declaration) {
-            var specifier = ts.getExternalModuleName(declaration);
-            var moduleSymbol = resolveExternalModuleNameWorker(specifier, specifier, /*moduleNotFoundError*/ undefined);
-            if (!moduleSymbol) {
-                return undefined;
+        function trackSymbol(symbol, enclosingDeclaration, meaning) {
+            handleSymbolAccessibilityError(resolver.isSymbolAccessible(symbol, enclosingDeclaration, meaning, /*shouldComputeAliasesToMakeVisible*/ true));
+            recordTypeReferenceDirectivesIfNecessary(resolver.getTypeReferenceDirectivesForSymbol(symbol, meaning));
+        }
+        function reportPrivateInBaseOfClassExpression(propertyName) {
+            if (errorNameNode) {
+                reportedDeclarationError = true;
+                emitterDiagnostics.add(ts.createDiagnosticForNode(errorNameNode, ts.Diagnostics.Property_0_of_exported_class_expression_may_not_be_private_or_protected, propertyName));
             }
-            return ts.getDeclarationOfKind(moduleSymbol, 256 /* SourceFile */);
         }
-        function initializeTypeChecker() {
-            // Bind all source files and propagate errors
-            for (var _i = 0, _a = host.getSourceFiles(); _i < _a.length; _i++) {
-                var file = _a[_i];
-                ts.bindSourceFile(file, compilerOptions);
+        function reportInaccessibleThisError() {
+            if (errorNameNode) {
+                reportedDeclarationError = true;
+                emitterDiagnostics.add(ts.createDiagnosticForNode(errorNameNode, ts.Diagnostics.The_inferred_type_of_0_references_an_inaccessible_this_type_A_type_annotation_is_necessary, ts.declarationNameToString(errorNameNode)));
             }
-            // Initialize global symbol table
-            var augmentations;
-            var requestedExternalEmitHelpers = 0;
-            var firstFileRequestingExternalHelpers;
-            for (var _b = 0, _c = host.getSourceFiles(); _b < _c.length; _b++) {
-                var file = _c[_b];
-                if (!ts.isExternalOrCommonJsModule(file)) {
-                    mergeSymbolTable(globals, file.locals);
-                }
-                if (file.patternAmbientModules && file.patternAmbientModules.length) {
-                    patternAmbientModules = ts.concatenate(patternAmbientModules, file.patternAmbientModules);
-                }
-                if (file.moduleAugmentations.length) {
-                    (augmentations || (augmentations = [])).push(file.moduleAugmentations);
-                }
-                if (file.symbol && file.symbol.globalExports) {
-                    // Merge in UMD exports with first-in-wins semantics (see #9771)
-                    var source = file.symbol.globalExports;
-                    for (var id in source) {
-                        if (!(id in globals)) {
-                            globals[id] = source[id];
-                        }
-                    }
-                }
-                if ((compilerOptions.isolatedModules || ts.isExternalModule(file)) && !file.isDeclarationFile) {
-                    var fileRequestedExternalEmitHelpers = file.flags & 31744 /* EmitHelperFlags */;
-                    if (fileRequestedExternalEmitHelpers) {
-                        requestedExternalEmitHelpers |= fileRequestedExternalEmitHelpers;
-                        if (firstFileRequestingExternalHelpers === undefined) {
-                            firstFileRequestingExternalHelpers = file;
-                        }
-                    }
-                }
+        }
+        function writeTypeOfDeclaration(declaration, type, getSymbolAccessibilityDiagnostic) {
+            writer.getSymbolAccessibilityDiagnostic = getSymbolAccessibilityDiagnostic;
+            write(": ");
+            // use the checker's type, not the declared type,
+            // for optional parameter properties
+            // and also for non-optional initialized parameters that aren't a parameter property
+            // these types may need to add `undefined`.
+            var shouldUseResolverType = declaration.kind === 146 /* Parameter */ &&
+                (resolver.isRequiredInitializedParameter(declaration) ||
+                    resolver.isOptionalUninitializedParameterProperty(declaration));
+            if (type && !shouldUseResolverType) {
+                // Write the type
+                emitType(type);
             }
-            if (augmentations) {
-                // merge module augmentations.
-                // this needs to be done after global symbol table is initialized to make sure that all ambient modules are indexed
-                for (var _d = 0, augmentations_1 = augmentations; _d < augmentations_1.length; _d++) {
-                    var list = augmentations_1[_d];
-                    for (var _e = 0, list_1 = list; _e < list_1.length; _e++) {
-                        var augmentation = list_1[_e];
-                        mergeModuleAugmentation(augmentation);
-                    }
-                }
+            else {
+                errorNameNode = declaration.name;
+                var format = 4 /* UseTypeOfFunction */ |
+                    16384 /* WriteClassExpressionAsTypeLiteral */ |
+                    2048 /* UseTypeAliasValue */ |
+                    (shouldUseResolverType ? 8192 /* AddUndefined */ : 0);
+                resolver.writeTypeOfDeclaration(declaration, enclosingDeclaration, format, writer);
+                errorNameNode = undefined;
             }
-            // Setup global builtins
-            addToSymbolTable(globals, builtinGlobals, ts.Diagnostics.Declaration_name_conflicts_with_built_in_global_identifier_0);
-            getSymbolLinks(undefinedSymbol).type = undefinedWideningType;
-            getSymbolLinks(argumentsSymbol).type = getGlobalType("IArguments");
-            getSymbolLinks(unknownSymbol).type = unknownType;
-            // Initialize special types
-            globalArrayType = getGlobalType("Array", /*arity*/ 1);
-            globalObjectType = getGlobalType("Object");
-            globalFunctionType = getGlobalType("Function");
-            globalStringType = getGlobalType("String");
-            globalNumberType = getGlobalType("Number");
-            globalBooleanType = getGlobalType("Boolean");
-            globalRegExpType = getGlobalType("RegExp");
-            jsxElementType = getExportedTypeFromNamespace("JSX", JsxNames.Element);
-            getGlobalClassDecoratorType = ts.memoize(function () { return getGlobalType("ClassDecorator"); });
-            getGlobalPropertyDecoratorType = ts.memoize(function () { return getGlobalType("PropertyDecorator"); });
-            getGlobalMethodDecoratorType = ts.memoize(function () { return getGlobalType("MethodDecorator"); });
-            getGlobalParameterDecoratorType = ts.memoize(function () { return getGlobalType("ParameterDecorator"); });
-            getGlobalTypedPropertyDescriptorType = ts.memoize(function () { return getGlobalType("TypedPropertyDescriptor", /*arity*/ 1); });
-            getGlobalESSymbolConstructorSymbol = ts.memoize(function () { return getGlobalValueSymbol("Symbol"); });
-            getGlobalPromiseType = ts.memoize(function () { return getGlobalType("Promise", /*arity*/ 1); });
-            tryGetGlobalPromiseType = ts.memoize(function () { return getGlobalSymbol("Promise", 793064 /* Type */, /*diagnostic*/ undefined) && getGlobalPromiseType(); });
-            getGlobalPromiseLikeType = ts.memoize(function () { return getGlobalType("PromiseLike", /*arity*/ 1); });
-            getInstantiatedGlobalPromiseLikeType = ts.memoize(createInstantiatedPromiseLikeType);
-            getGlobalPromiseConstructorSymbol = ts.memoize(function () { return getGlobalValueSymbol("Promise"); });
-            tryGetGlobalPromiseConstructorSymbol = ts.memoize(function () { return getGlobalSymbol("Promise", 107455 /* Value */, /*diagnostic*/ undefined) && getGlobalPromiseConstructorSymbol(); });
-            getGlobalPromiseConstructorLikeType = ts.memoize(function () { return getGlobalType("PromiseConstructorLike"); });
-            getGlobalThenableType = ts.memoize(createThenableType);
-            getGlobalTemplateStringsArrayType = ts.memoize(function () { return getGlobalType("TemplateStringsArray"); });
-            if (languageVersion >= 2 /* ES6 */) {
-                getGlobalESSymbolType = ts.memoize(function () { return getGlobalType("Symbol"); });
-                getGlobalIterableType = ts.memoize(function () { return getGlobalType("Iterable", /*arity*/ 1); });
-                getGlobalIteratorType = ts.memoize(function () { return getGlobalType("Iterator", /*arity*/ 1); });
-                getGlobalIterableIteratorType = ts.memoize(function () { return getGlobalType("IterableIterator", /*arity*/ 1); });
+        }
+        function writeReturnTypeAtSignature(signature, getSymbolAccessibilityDiagnostic) {
+            writer.getSymbolAccessibilityDiagnostic = getSymbolAccessibilityDiagnostic;
+            write(": ");
+            if (signature.type) {
+                // Write the type
+                emitType(signature.type);
             }
             else {
-                getGlobalESSymbolType = ts.memoize(function () { return emptyObjectType; });
-                getGlobalIterableType = ts.memoize(function () { return emptyGenericType; });
-                getGlobalIteratorType = ts.memoize(function () { return emptyGenericType; });
-                getGlobalIterableIteratorType = ts.memoize(function () { return emptyGenericType; });
+                errorNameNode = signature.name;
+                resolver.writeReturnTypeOfSignatureDeclaration(signature, enclosingDeclaration, 4 /* UseTypeOfFunction */ | 2048 /* UseTypeAliasValue */ | 16384 /* WriteClassExpressionAsTypeLiteral */, writer);
+                errorNameNode = undefined;
             }
-            anyArrayType = createArrayType(anyType);
-            var symbol = getGlobalSymbol("ReadonlyArray", 793064 /* Type */, /*diagnostic*/ undefined);
-            globalReadonlyArrayType = symbol && getTypeOfGlobalSymbol(symbol, /*arity*/ 1);
-            anyReadonlyArrayType = globalReadonlyArrayType ? createTypeFromGenericGlobalType(globalReadonlyArrayType, [anyType]) : anyArrayType;
-            // If we have specified that we are importing helpers, we should report global
-            // errors if we cannot resolve the helpers external module, or if it does not have
-            // the necessary helpers exported.
-            if (compilerOptions.importHelpers && firstFileRequestingExternalHelpers) {
-                // Find the first reference to the helpers module.
-                var helpersModule = resolveExternalModule(firstFileRequestingExternalHelpers, ts.externalHelpersModuleNameText, ts.Diagnostics.Cannot_find_module_0, 
-                /*errorNode*/ undefined);
-                // If we found the module, report errors if it does not have the necessary exports.
-                if (helpersModule) {
-                    var exports = helpersModule.exports;
-                    if (requestedExternalEmitHelpers & 1024 /* HasClassExtends */ && languageVersion < 2 /* ES6 */) {
-                        verifyHelperSymbol(exports, "__extends", 107455 /* Value */);
-                    }
-                    if (requestedExternalEmitHelpers & 16384 /* HasJsxSpreadAttributes */ && compilerOptions.jsx !== 1 /* Preserve */) {
-                        verifyHelperSymbol(exports, "__assign", 107455 /* Value */);
-                    }
-                    if (requestedExternalEmitHelpers & 2048 /* HasDecorators */) {
-                        verifyHelperSymbol(exports, "__decorate", 107455 /* Value */);
-                        if (compilerOptions.emitDecoratorMetadata) {
-                            verifyHelperSymbol(exports, "__metadata", 107455 /* Value */);
-                        }
-                    }
-                    if (requestedExternalEmitHelpers & 4096 /* HasParamDecorators */) {
-                        verifyHelperSymbol(exports, "__param", 107455 /* Value */);
-                    }
-                    if (requestedExternalEmitHelpers & 8192 /* HasAsyncFunctions */) {
-                        verifyHelperSymbol(exports, "__awaiter", 107455 /* Value */);
-                        if (languageVersion < 2 /* ES6 */) {
-                            verifyHelperSymbol(exports, "__generator", 107455 /* Value */);
-                        }
+        }
+        function emitLines(nodes) {
+            for (var _i = 0, nodes_3 = nodes; _i < nodes_3.length; _i++) {
+                var node = nodes_3[_i];
+                emit(node);
+            }
+        }
+        function emitSeparatedList(nodes, separator, eachNodeEmitFn, canEmitFn) {
+            var currentWriterPos = writer.getTextPos();
+            for (var _i = 0, nodes_4 = nodes; _i < nodes_4.length; _i++) {
+                var node = nodes_4[_i];
+                if (!canEmitFn || canEmitFn(node)) {
+                    if (currentWriterPos !== writer.getTextPos()) {
+                        write(separator);
                     }
+                    currentWriterPos = writer.getTextPos();
+                    eachNodeEmitFn(node);
                 }
             }
         }
-        function verifyHelperSymbol(symbols, name, meaning) {
-            var symbol = getSymbol(symbols, ts.escapeIdentifier(name), meaning);
-            if (!symbol) {
-                error(/*location*/ undefined, ts.Diagnostics.Module_0_has_no_exported_member_1, ts.externalHelpersModuleNameText, name);
-            }
+        function emitCommaList(nodes, eachNodeEmitFn, canEmitFn) {
+            emitSeparatedList(nodes, ", ", eachNodeEmitFn, canEmitFn);
         }
-        function createInstantiatedPromiseLikeType() {
-            var promiseLikeType = getGlobalPromiseLikeType();
-            if (promiseLikeType !== emptyGenericType) {
-                return createTypeReference(promiseLikeType, [anyType]);
+        function writeJsDocComments(declaration) {
+            if (declaration) {
+                var jsDocComments = ts.getJSDocCommentRanges(declaration, currentText);
+                ts.emitNewLineBeforeLeadingComments(currentLineMap, writer, declaration, jsDocComments);
+                // jsDoc comments are emitted at /*leading comment1 */space/*leading comment*/space
+                ts.emitComments(currentText, currentLineMap, writer, jsDocComments, /*leadingSeparator*/ false, /*trailingSeparator*/ true, newLine, ts.writeCommentRange);
             }
-            return emptyObjectType;
         }
-        function createThenableType() {
-            // build the thenable type that is used to verify against a non-promise "thenable" operand to `await`.
-            var thenPropertySymbol = createSymbol(67108864 /* Transient */ | 4 /* Property */, "then");
-            getSymbolLinks(thenPropertySymbol).type = globalFunctionType;
-            var thenableType = createObjectType(2097152 /* Anonymous */);
-            thenableType.properties = [thenPropertySymbol];
-            thenableType.members = createSymbolTable(thenableType.properties);
-            thenableType.callSignatures = [];
-            thenableType.constructSignatures = [];
-            return thenableType;
+        function emitTypeWithNewGetSymbolAccessibilityDiagnostic(type, getSymbolAccessibilityDiagnostic) {
+            writer.getSymbolAccessibilityDiagnostic = getSymbolAccessibilityDiagnostic;
+            emitType(type);
         }
-        // GRAMMAR CHECKING
-        function checkGrammarDecorators(node) {
-            if (!node.decorators) {
-                return false;
+        function emitType(type) {
+            switch (type.kind) {
+                case 119 /* AnyKeyword */:
+                case 136 /* StringKeyword */:
+                case 133 /* NumberKeyword */:
+                case 122 /* BooleanKeyword */:
+                case 134 /* ObjectKeyword */:
+                case 137 /* SymbolKeyword */:
+                case 105 /* VoidKeyword */:
+                case 139 /* UndefinedKeyword */:
+                case 95 /* NullKeyword */:
+                case 130 /* NeverKeyword */:
+                case 169 /* ThisType */:
+                case 173 /* LiteralType */:
+                    return writeTextOfNode(currentText, type);
+                case 201 /* ExpressionWithTypeArguments */:
+                    return emitExpressionWithTypeArguments(type);
+                case 159 /* TypeReference */:
+                    return emitTypeReference(type);
+                case 162 /* TypeQuery */:
+                    return emitTypeQuery(type);
+                case 164 /* ArrayType */:
+                    return emitArrayType(type);
+                case 165 /* TupleType */:
+                    return emitTupleType(type);
+                case 166 /* UnionType */:
+                    return emitUnionType(type);
+                case 167 /* IntersectionType */:
+                    return emitIntersectionType(type);
+                case 168 /* ParenthesizedType */:
+                    return emitParenType(type);
+                case 170 /* TypeOperator */:
+                    return emitTypeOperator(type);
+                case 171 /* IndexedAccessType */:
+                    return emitIndexedAccessType(type);
+                case 172 /* MappedType */:
+                    return emitMappedType(type);
+                case 160 /* FunctionType */:
+                case 161 /* ConstructorType */:
+                    return emitSignatureDeclarationWithJsDocComments(type);
+                case 163 /* TypeLiteral */:
+                    return emitTypeLiteral(type);
+                case 71 /* Identifier */:
+                    return emitEntityName(type);
+                case 143 /* QualifiedName */:
+                    return emitEntityName(type);
+                case 158 /* TypePredicate */:
+                    return emitTypePredicate(type);
             }
-            if (!ts.nodeCanBeDecorated(node)) {
-                if (node.kind === 147 /* MethodDeclaration */ && !ts.nodeIsPresent(node.body)) {
-                    return grammarErrorOnFirstToken(node, ts.Diagnostics.A_decorator_can_only_decorate_a_method_implementation_not_an_overload);
+            function writeEntityName(entityName) {
+                if (entityName.kind === 71 /* Identifier */) {
+                    writeTextOfNode(currentText, entityName);
                 }
                 else {
-                    return grammarErrorOnFirstToken(node, ts.Diagnostics.Decorators_are_not_valid_here);
-                }
-            }
-            else if (node.kind === 149 /* GetAccessor */ || node.kind === 150 /* SetAccessor */) {
-                var accessors = ts.getAllAccessorDeclarations(node.parent.members, node);
-                if (accessors.firstAccessor.decorators && node === accessors.secondAccessor) {
-                    return grammarErrorOnFirstToken(node, ts.Diagnostics.Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name);
+                    var left = entityName.kind === 143 /* QualifiedName */ ? entityName.left : entityName.expression;
+                    var right = entityName.kind === 143 /* QualifiedName */ ? entityName.right : entityName.name;
+                    writeEntityName(left);
+                    write(".");
+                    writeTextOfNode(currentText, right);
                 }
             }
-            return false;
-        }
-        function checkGrammarModifiers(node) {
-            var quickResult = reportObviousModifierErrors(node);
-            if (quickResult !== undefined) {
-                return quickResult;
+            function emitEntityName(entityName) {
+                var visibilityResult = resolver.isEntityNameVisible(entityName, 
+                // Aliases can be written asynchronously so use correct enclosing declaration
+                entityName.parent.kind === 237 /* ImportEqualsDeclaration */ ? entityName.parent : enclosingDeclaration);
+                handleSymbolAccessibilityError(visibilityResult);
+                recordTypeReferenceDirectivesIfNecessary(resolver.getTypeReferenceDirectivesForEntityName(entityName));
+                writeEntityName(entityName);
             }
-            var lastStatic, lastPrivate, lastProtected, lastDeclare, lastAsync, lastReadonly;
-            var flags = 0 /* None */;
-            for (var _i = 0, _a = node.modifiers; _i < _a.length; _i++) {
-                var modifier = _a[_i];
-                if (modifier.kind !== 128 /* ReadonlyKeyword */) {
-                    if (node.kind === 144 /* PropertySignature */ || node.kind === 146 /* MethodSignature */) {
-                        return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_type_member, ts.tokenToString(modifier.kind));
-                    }
-                    if (node.kind === 153 /* IndexSignature */) {
-                        return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_an_index_signature, ts.tokenToString(modifier.kind));
+            function emitExpressionWithTypeArguments(node) {
+                if (ts.isEntityNameExpression(node.expression)) {
+                    ts.Debug.assert(node.expression.kind === 71 /* Identifier */ || node.expression.kind === 179 /* PropertyAccessExpression */);
+                    emitEntityName(node.expression);
+                    if (node.typeArguments) {
+                        write("<");
+                        emitCommaList(node.typeArguments, emitType);
+                        write(">");
                     }
                 }
-                switch (modifier.kind) {
-                    case 74 /* ConstKeyword */:
-                        if (node.kind !== 224 /* EnumDeclaration */ && node.parent.kind === 221 /* ClassDeclaration */) {
-                            return grammarErrorOnNode(node, ts.Diagnostics.A_class_member_cannot_have_the_0_keyword, ts.tokenToString(74 /* ConstKeyword */));
-                        }
-                        break;
-                    case 112 /* PublicKeyword */:
-                    case 111 /* ProtectedKeyword */:
-                    case 110 /* PrivateKeyword */:
-                        var text = visibilityToString(ts.modifierToFlag(modifier.kind));
-                        if (modifier.kind === 111 /* ProtectedKeyword */) {
-                            lastProtected = modifier;
-                        }
-                        else if (modifier.kind === 110 /* PrivateKeyword */) {
-                            lastPrivate = modifier;
-                        }
-                        if (flags & 28 /* AccessibilityModifier */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics.Accessibility_modifier_already_seen);
-                        }
-                        else if (flags & 32 /* Static */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "static");
-                        }
-                        else if (flags & 64 /* Readonly */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "readonly");
-                        }
-                        else if (flags & 256 /* Async */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "async");
-                        }
-                        else if (node.parent.kind === 226 /* ModuleBlock */ || node.parent.kind === 256 /* SourceFile */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_module_or_namespace_element, text);
-                        }
-                        else if (flags & 128 /* Abstract */) {
-                            if (modifier.kind === 110 /* PrivateKeyword */) {
-                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, text, "abstract");
-                            }
-                            else {
-                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "abstract");
-                            }
-                        }
-                        flags |= ts.modifierToFlag(modifier.kind);
-                        break;
-                    case 113 /* StaticKeyword */:
-                        if (flags & 32 /* Static */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "static");
-                        }
-                        else if (flags & 64 /* Readonly */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "static", "readonly");
-                        }
-                        else if (flags & 256 /* Async */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "static", "async");
-                        }
-                        else if (node.parent.kind === 226 /* ModuleBlock */ || node.parent.kind === 256 /* SourceFile */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_module_or_namespace_element, "static");
-                        }
-                        else if (node.kind === 142 /* Parameter */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "static");
-                        }
-                        else if (flags & 128 /* Abstract */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, "static", "abstract");
-                        }
-                        flags |= 32 /* Static */;
-                        lastStatic = modifier;
-                        break;
-                    case 128 /* ReadonlyKeyword */:
-                        if (flags & 64 /* Readonly */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "readonly");
-                        }
-                        else if (node.kind !== 145 /* PropertyDeclaration */ && node.kind !== 144 /* PropertySignature */ && node.kind !== 153 /* IndexSignature */ && node.kind !== 142 /* Parameter */) {
-                            // If node.kind === SyntaxKind.Parameter, checkParameter report an error if it's not a parameter property.
-                            return grammarErrorOnNode(modifier, ts.Diagnostics.readonly_modifier_can_only_appear_on_a_property_declaration_or_index_signature);
-                        }
-                        flags |= 64 /* Readonly */;
-                        lastReadonly = modifier;
-                        break;
-                    case 82 /* ExportKeyword */:
-                        if (flags & 1 /* Export */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "export");
-                        }
-                        else if (flags & 2 /* Ambient */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "export", "declare");
-                        }
-                        else if (flags & 128 /* Abstract */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "export", "abstract");
-                        }
-                        else if (flags & 256 /* Async */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "export", "async");
-                        }
-                        else if (node.parent.kind === 221 /* ClassDeclaration */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_class_element, "export");
-                        }
-                        else if (node.kind === 142 /* Parameter */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "export");
-                        }
-                        flags |= 1 /* Export */;
-                        break;
-                    case 122 /* DeclareKeyword */:
-                        if (flags & 2 /* Ambient */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "declare");
-                        }
-                        else if (flags & 256 /* Async */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_in_an_ambient_context, "async");
-                        }
-                        else if (node.parent.kind === 221 /* ClassDeclaration */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_class_element, "declare");
-                        }
-                        else if (node.kind === 142 /* Parameter */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "declare");
-                        }
-                        else if (ts.isInAmbientContext(node.parent) && node.parent.kind === 226 /* ModuleBlock */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics.A_declare_modifier_cannot_be_used_in_an_already_ambient_context);
-                        }
-                        flags |= 2 /* Ambient */;
-                        lastDeclare = modifier;
-                        break;
-                    case 115 /* AbstractKeyword */:
-                        if (flags & 128 /* Abstract */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "abstract");
-                        }
-                        if (node.kind !== 221 /* ClassDeclaration */) {
-                            if (node.kind !== 147 /* MethodDeclaration */ &&
-                                node.kind !== 145 /* PropertyDeclaration */ &&
-                                node.kind !== 149 /* GetAccessor */ &&
-                                node.kind !== 150 /* SetAccessor */) {
-                                return grammarErrorOnNode(modifier, ts.Diagnostics.abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration);
-                            }
-                            if (!(node.parent.kind === 221 /* ClassDeclaration */ && ts.getModifierFlags(node.parent) & 128 /* Abstract */)) {
-                                return grammarErrorOnNode(modifier, ts.Diagnostics.Abstract_methods_can_only_appear_within_an_abstract_class);
-                            }
-                            if (flags & 32 /* Static */) {
-                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, "static", "abstract");
-                            }
-                            if (flags & 8 /* Private */) {
-                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, "private", "abstract");
-                            }
-                        }
-                        flags |= 128 /* Abstract */;
-                        break;
-                    case 118 /* AsyncKeyword */:
-                        if (flags & 256 /* Async */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "async");
-                        }
-                        else if (flags & 2 /* Ambient */ || ts.isInAmbientContext(node.parent)) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_in_an_ambient_context, "async");
-                        }
-                        else if (node.kind === 142 /* Parameter */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "async");
-                        }
-                        flags |= 256 /* Async */;
-                        lastAsync = modifier;
-                        break;
+            }
+            function emitTypeReference(type) {
+                emitEntityName(type.typeName);
+                if (type.typeArguments) {
+                    write("<");
+                    emitCommaList(type.typeArguments, emitType);
+                    write(">");
                 }
             }
-            if (node.kind === 148 /* Constructor */) {
-                if (flags & 32 /* Static */) {
-                    return grammarErrorOnNode(lastStatic, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "static");
+            function emitTypePredicate(type) {
+                writeTextOfNode(currentText, type.parameterName);
+                write(" is ");
+                emitType(type.type);
+            }
+            function emitTypeQuery(type) {
+                write("typeof ");
+                emitEntityName(type.exprName);
+            }
+            function emitArrayType(type) {
+                emitType(type.elementType);
+                write("[]");
+            }
+            function emitTupleType(type) {
+                write("[");
+                emitCommaList(type.elementTypes, emitType);
+                write("]");
+            }
+            function emitUnionType(type) {
+                emitSeparatedList(type.types, " | ", emitType);
+            }
+            function emitIntersectionType(type) {
+                emitSeparatedList(type.types, " & ", emitType);
+            }
+            function emitParenType(type) {
+                write("(");
+                emitType(type.type);
+                write(")");
+            }
+            function emitTypeOperator(type) {
+                write(ts.tokenToString(type.operator));
+                write(" ");
+                emitType(type.type);
+            }
+            function emitIndexedAccessType(node) {
+                emitType(node.objectType);
+                write("[");
+                emitType(node.indexType);
+                write("]");
+            }
+            function emitMappedType(node) {
+                var prevEnclosingDeclaration = enclosingDeclaration;
+                enclosingDeclaration = node;
+                write("{");
+                writeLine();
+                increaseIndent();
+                if (node.readonlyToken) {
+                    write("readonly ");
                 }
-                if (flags & 128 /* Abstract */) {
-                    return grammarErrorOnNode(lastStatic, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "abstract");
+                write("[");
+                writeEntityName(node.typeParameter.name);
+                write(" in ");
+                emitType(node.typeParameter.constraint);
+                write("]");
+                if (node.questionToken) {
+                    write("?");
                 }
-                else if (flags & 256 /* Async */) {
-                    return grammarErrorOnNode(lastAsync, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "async");
+                write(": ");
+                emitType(node.type);
+                write(";");
+                writeLine();
+                decreaseIndent();
+                write("}");
+                enclosingDeclaration = prevEnclosingDeclaration;
+            }
+            function emitTypeLiteral(type) {
+                write("{");
+                if (type.members.length) {
+                    writeLine();
+                    increaseIndent();
+                    // write members
+                    emitLines(type.members);
+                    decreaseIndent();
                 }
-                else if (flags & 64 /* Readonly */) {
-                    return grammarErrorOnNode(lastReadonly, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "readonly");
+                write("}");
+            }
+        }
+        function emitSourceFile(node) {
+            currentText = node.text;
+            currentLineMap = ts.getLineStarts(node);
+            currentIdentifiers = node.identifiers;
+            isCurrentFileExternalModule = ts.isExternalModule(node);
+            enclosingDeclaration = node;
+            ts.emitDetachedComments(currentText, currentLineMap, writer, ts.writeCommentRange, node, newLine, /*removeComments*/ true);
+            emitLines(node.statements);
+        }
+        // Return a temp variable name to be used in `export default`/`export class ... extends` statements.
+        // The temp name will be of the form _default_counter.
+        // Note that export default is only allowed at most once in a module, so we
+        // do not need to keep track of created temp names.
+        function getExportTempVariableName(baseName) {
+            if (!currentIdentifiers.has(baseName)) {
+                return baseName;
+            }
+            var count = 0;
+            while (true) {
+                count++;
+                var name_39 = baseName + "_" + count;
+                if (!currentIdentifiers.has(name_39)) {
+                    return name_39;
                 }
-                return;
             }
-            else if ((node.kind === 230 /* ImportDeclaration */ || node.kind === 229 /* ImportEqualsDeclaration */) && flags & 2 /* Ambient */) {
-                return grammarErrorOnNode(lastDeclare, ts.Diagnostics.A_0_modifier_cannot_be_used_with_an_import_declaration, "declare");
+        }
+        function emitTempVariableDeclaration(expr, baseName, diagnostic, needsDeclare) {
+            var tempVarName = getExportTempVariableName(baseName);
+            if (needsDeclare) {
+                write("declare ");
             }
-            else if (node.kind === 142 /* Parameter */ && (flags & 92 /* ParameterPropertyModifier */) && ts.isBindingPattern(node.name)) {
-                return grammarErrorOnNode(node, ts.Diagnostics.A_parameter_property_may_not_be_declared_using_a_binding_pattern);
+            write("const ");
+            write(tempVarName);
+            write(": ");
+            writer.getSymbolAccessibilityDiagnostic = function () { return diagnostic; };
+            resolver.writeTypeOfExpression(expr, enclosingDeclaration, 4 /* UseTypeOfFunction */ | 2048 /* UseTypeAliasValue */ | 16384 /* WriteClassExpressionAsTypeLiteral */, writer);
+            write(";");
+            writeLine();
+            return tempVarName;
+        }
+        function emitExportAssignment(node) {
+            if (node.expression.kind === 71 /* Identifier */) {
+                write(node.isExportEquals ? "export = " : "export default ");
+                writeTextOfNode(currentText, node.expression);
             }
-            else if (node.kind === 142 /* Parameter */ && (flags & 92 /* ParameterPropertyModifier */) && node.dotDotDotToken) {
-                return grammarErrorOnNode(node, ts.Diagnostics.A_parameter_property_cannot_be_declared_using_a_rest_parameter);
+            else {
+                var tempVarName = emitTempVariableDeclaration(node.expression, "_default", {
+                    diagnosticMessage: ts.Diagnostics.Default_export_of_the_module_has_or_is_using_private_name_0,
+                    errorNode: node
+                }, needsDeclare);
+                write(node.isExportEquals ? "export = " : "export default ");
+                write(tempVarName);
             }
-            if (flags & 256 /* Async */) {
-                return checkGrammarAsyncModifier(node, lastAsync);
+            write(";");
+            writeLine();
+            // Make all the declarations visible for the export name
+            if (node.expression.kind === 71 /* Identifier */) {
+                var nodes = resolver.collectLinkedAliases(node.expression);
+                // write each of these declarations asynchronously
+                writeAsynchronousModuleElements(nodes);
             }
         }
-        /**
-         * true | false: Early return this value from checkGrammarModifiers.
-         * undefined: Need to do full checking on the modifiers.
-         */
-        function reportObviousModifierErrors(node) {
-            return !node.modifiers
-                ? false
-                : shouldReportBadModifier(node)
-                    ? grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here)
-                    : undefined;
+        function isModuleElementVisible(node) {
+            return resolver.isDeclarationVisible(node);
         }
-        function shouldReportBadModifier(node) {
-            switch (node.kind) {
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                case 148 /* Constructor */:
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                case 153 /* IndexSignature */:
-                case 225 /* ModuleDeclaration */:
-                case 230 /* ImportDeclaration */:
-                case 229 /* ImportEqualsDeclaration */:
-                case 236 /* ExportDeclaration */:
-                case 235 /* ExportAssignment */:
-                case 179 /* FunctionExpression */:
-                case 180 /* ArrowFunction */:
-                case 142 /* Parameter */:
-                    return false;
-                default:
-                    if (node.parent.kind === 226 /* ModuleBlock */ || node.parent.kind === 256 /* SourceFile */) {
-                        return false;
-                    }
-                    switch (node.kind) {
-                        case 220 /* FunctionDeclaration */:
-                            return nodeHasAnyModifiersExcept(node, 118 /* AsyncKeyword */);
-                        case 221 /* ClassDeclaration */:
-                            return nodeHasAnyModifiersExcept(node, 115 /* AbstractKeyword */);
-                        case 222 /* InterfaceDeclaration */:
-                        case 200 /* VariableStatement */:
-                        case 223 /* TypeAliasDeclaration */:
-                            return true;
-                        case 224 /* EnumDeclaration */:
-                            return nodeHasAnyModifiersExcept(node, 74 /* ConstKeyword */);
-                        default:
-                            ts.Debug.fail();
-                            return false;
-                    }
+        function emitModuleElement(node, isModuleElementVisible) {
+            if (isModuleElementVisible) {
+                writeModuleElement(node);
             }
-        }
-        function nodeHasAnyModifiersExcept(node, allowedModifier) {
-            return node.modifiers.length > 1 || node.modifiers[0].kind !== allowedModifier;
-        }
-        function checkGrammarAsyncModifier(node, asyncModifier) {
-            switch (node.kind) {
-                case 147 /* MethodDeclaration */:
-                case 220 /* FunctionDeclaration */:
-                case 179 /* FunctionExpression */:
-                case 180 /* ArrowFunction */:
-                    if (!node.asteriskToken) {
-                        return false;
+            else if (node.kind === 237 /* ImportEqualsDeclaration */ ||
+                (node.parent.kind === 265 /* SourceFile */ && isCurrentFileExternalModule)) {
+                var isVisible = void 0;
+                if (asynchronousSubModuleDeclarationEmitInfo && node.parent.kind !== 265 /* SourceFile */) {
+                    // Import declaration of another module that is visited async so lets put it in right spot
+                    asynchronousSubModuleDeclarationEmitInfo.push({
+                        node: node,
+                        outputPos: writer.getTextPos(),
+                        indent: writer.getIndent(),
+                        isVisible: isVisible
+                    });
+                }
+                else {
+                    if (node.kind === 238 /* ImportDeclaration */) {
+                        var importDeclaration = node;
+                        if (importDeclaration.importClause) {
+                            isVisible = (importDeclaration.importClause.name && resolver.isDeclarationVisible(importDeclaration.importClause)) ||
+                                isVisibleNamedBinding(importDeclaration.importClause.namedBindings);
+                        }
                     }
-                    break;
-            }
-            return grammarErrorOnNode(asyncModifier, ts.Diagnostics._0_modifier_cannot_be_used_here, "async");
-        }
-        function checkGrammarForDisallowedTrailingComma(list) {
-            if (list && list.hasTrailingComma) {
-                var start = list.end - ",".length;
-                var end = list.end;
-                var sourceFile = ts.getSourceFileOfNode(list[0]);
-                return grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.Trailing_comma_not_allowed);
+                    moduleElementDeclarationEmitInfo.push({
+                        node: node,
+                        outputPos: writer.getTextPos(),
+                        indent: writer.getIndent(),
+                        isVisible: isVisible
+                    });
+                }
             }
         }
-        function checkGrammarTypeParameterList(node, typeParameters, file) {
-            if (checkGrammarForDisallowedTrailingComma(typeParameters)) {
-                return true;
-            }
-            if (typeParameters && typeParameters.length === 0) {
-                var start = typeParameters.pos - "<".length;
-                var end = ts.skipTrivia(file.text, typeParameters.end) + ">".length;
-                return grammarErrorAtPos(file, start, end - start, ts.Diagnostics.Type_parameter_list_cannot_be_empty);
+        function writeModuleElement(node) {
+            switch (node.kind) {
+                case 228 /* FunctionDeclaration */:
+                    return writeFunctionDeclaration(node);
+                case 208 /* VariableStatement */:
+                    return writeVariableStatement(node);
+                case 230 /* InterfaceDeclaration */:
+                    return writeInterfaceDeclaration(node);
+                case 229 /* ClassDeclaration */:
+                    return writeClassDeclaration(node);
+                case 231 /* TypeAliasDeclaration */:
+                    return writeTypeAliasDeclaration(node);
+                case 232 /* EnumDeclaration */:
+                    return writeEnumDeclaration(node);
+                case 233 /* ModuleDeclaration */:
+                    return writeModuleDeclaration(node);
+                case 237 /* ImportEqualsDeclaration */:
+                    return writeImportEqualsDeclaration(node);
+                case 238 /* ImportDeclaration */:
+                    return writeImportDeclaration(node);
+                default:
+                    ts.Debug.fail("Unknown symbol kind");
             }
         }
-        function checkGrammarParameterList(parameters) {
-            var seenOptionalParameter = false;
-            var parameterCount = parameters.length;
-            for (var i = 0; i < parameterCount; i++) {
-                var parameter = parameters[i];
-                if (parameter.dotDotDotToken) {
-                    if (i !== (parameterCount - 1)) {
-                        return grammarErrorOnNode(parameter.dotDotDotToken, ts.Diagnostics.A_rest_parameter_must_be_last_in_a_parameter_list);
-                    }
-                    if (ts.isBindingPattern(parameter.name)) {
-                        return grammarErrorOnNode(parameter.name, ts.Diagnostics.A_rest_element_cannot_contain_a_binding_pattern);
-                    }
-                    if (parameter.questionToken) {
-                        return grammarErrorOnNode(parameter.questionToken, ts.Diagnostics.A_rest_parameter_cannot_be_optional);
-                    }
-                    if (parameter.initializer) {
-                        return grammarErrorOnNode(parameter.name, ts.Diagnostics.A_rest_parameter_cannot_have_an_initializer);
-                    }
+        function emitModuleElementDeclarationFlags(node) {
+            // If the node is parented in the current source file we need to emit export declare or just export
+            if (node.parent.kind === 265 /* SourceFile */) {
+                var modifiers = ts.getModifierFlags(node);
+                // If the node is exported
+                if (modifiers & 1 /* Export */) {
+                    write("export ");
                 }
-                else if (parameter.questionToken) {
-                    seenOptionalParameter = true;
-                    if (parameter.initializer) {
-                        return grammarErrorOnNode(parameter.name, ts.Diagnostics.Parameter_cannot_have_question_mark_and_initializer);
-                    }
+                if (modifiers & 512 /* Default */) {
+                    write("default ");
                 }
-                else if (seenOptionalParameter && !parameter.initializer) {
-                    return grammarErrorOnNode(parameter.name, ts.Diagnostics.A_required_parameter_cannot_follow_an_optional_parameter);
+                else if (node.kind !== 230 /* InterfaceDeclaration */ && needsDeclare) {
+                    write("declare ");
                 }
             }
         }
-        function checkGrammarFunctionLikeDeclaration(node) {
-            // Prevent cascading error by short-circuit
-            var file = ts.getSourceFileOfNode(node);
-            return checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarTypeParameterList(node, node.typeParameters, file) ||
-                checkGrammarParameterList(node.parameters) || checkGrammarArrowFunction(node, file);
+        function emitClassMemberDeclarationFlags(flags) {
+            if (flags & 8 /* Private */) {
+                write("private ");
+            }
+            else if (flags & 16 /* Protected */) {
+                write("protected ");
+            }
+            if (flags & 32 /* Static */) {
+                write("static ");
+            }
+            if (flags & 64 /* Readonly */) {
+                write("readonly ");
+            }
+            if (flags & 128 /* Abstract */) {
+                write("abstract ");
+            }
         }
-        function checkGrammarArrowFunction(node, file) {
-            if (node.kind === 180 /* ArrowFunction */) {
-                var arrowFunction = node;
-                var startLine = ts.getLineAndCharacterOfPosition(file, arrowFunction.equalsGreaterThanToken.pos).line;
-                var endLine = ts.getLineAndCharacterOfPosition(file, arrowFunction.equalsGreaterThanToken.end).line;
-                if (startLine !== endLine) {
-                    return grammarErrorOnNode(arrowFunction.equalsGreaterThanToken, ts.Diagnostics.Line_terminator_not_permitted_before_arrow);
-                }
+        function writeImportEqualsDeclaration(node) {
+            // note usage of writer. methods instead of aliases created, just to make sure we are using
+            // correct writer especially to handle asynchronous alias writing
+            emitJsDocComments(node);
+            if (ts.hasModifier(node, 1 /* Export */)) {
+                write("export ");
+            }
+            write("import ");
+            writeTextOfNode(currentText, node.name);
+            write(" = ");
+            if (ts.isInternalModuleImportEqualsDeclaration(node)) {
+                emitTypeWithNewGetSymbolAccessibilityDiagnostic(node.moduleReference, getImportEntityNameVisibilityError);
+                write(";");
+            }
+            else {
+                write("require(");
+                emitExternalModuleSpecifier(node);
+                write(");");
+            }
+            writer.writeLine();
+            function getImportEntityNameVisibilityError() {
+                return {
+                    diagnosticMessage: ts.Diagnostics.Import_declaration_0_is_using_private_name_1,
+                    errorNode: node,
+                    typeName: node.name
+                };
             }
-            return false;
         }
-        function checkGrammarIndexSignatureParameters(node) {
-            var parameter = node.parameters[0];
-            if (node.parameters.length !== 1) {
-                if (parameter) {
-                    return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_must_have_exactly_one_parameter);
+        function isVisibleNamedBinding(namedBindings) {
+            if (namedBindings) {
+                if (namedBindings.kind === 240 /* NamespaceImport */) {
+                    return resolver.isDeclarationVisible(namedBindings);
                 }
                 else {
-                    return grammarErrorOnNode(node, ts.Diagnostics.An_index_signature_must_have_exactly_one_parameter);
+                    return ts.forEach(namedBindings.elements, function (namedImport) { return resolver.isDeclarationVisible(namedImport); });
                 }
             }
-            if (parameter.dotDotDotToken) {
-                return grammarErrorOnNode(parameter.dotDotDotToken, ts.Diagnostics.An_index_signature_cannot_have_a_rest_parameter);
+        }
+        function writeImportDeclaration(node) {
+            emitJsDocComments(node);
+            if (ts.hasModifier(node, 1 /* Export */)) {
+                write("export ");
             }
-            if (ts.getModifierFlags(parameter) !== 0) {
-                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_cannot_have_an_accessibility_modifier);
+            write("import ");
+            if (node.importClause) {
+                var currentWriterPos = writer.getTextPos();
+                if (node.importClause.name && resolver.isDeclarationVisible(node.importClause)) {
+                    writeTextOfNode(currentText, node.importClause.name);
+                }
+                if (node.importClause.namedBindings && isVisibleNamedBinding(node.importClause.namedBindings)) {
+                    if (currentWriterPos !== writer.getTextPos()) {
+                        // If the default binding was emitted, write the separated
+                        write(", ");
+                    }
+                    if (node.importClause.namedBindings.kind === 240 /* NamespaceImport */) {
+                        write("* as ");
+                        writeTextOfNode(currentText, node.importClause.namedBindings.name);
+                    }
+                    else {
+                        write("{ ");
+                        emitCommaList(node.importClause.namedBindings.elements, emitImportOrExportSpecifier, resolver.isDeclarationVisible);
+                        write(" }");
+                    }
+                }
+                write(" from ");
             }
-            if (parameter.questionToken) {
-                return grammarErrorOnNode(parameter.questionToken, ts.Diagnostics.An_index_signature_parameter_cannot_have_a_question_mark);
+            emitExternalModuleSpecifier(node);
+            write(";");
+            writer.writeLine();
+        }
+        function emitExternalModuleSpecifier(parent) {
+            // emitExternalModuleSpecifier is usually called when we emit something in the.d.ts file that will make it an external module (i.e. import/export declarations).
+            // the only case when it is not true is when we call it to emit correct name for module augmentation - d.ts files with just module augmentations are not considered
+            // external modules since they are indistinguishable from script files with ambient modules. To fix this in such d.ts files we'll emit top level 'export {}'
+            // so compiler will treat them as external modules.
+            resultHasExternalModuleIndicator = resultHasExternalModuleIndicator || parent.kind !== 233 /* ModuleDeclaration */;
+            var moduleSpecifier;
+            if (parent.kind === 237 /* ImportEqualsDeclaration */) {
+                var node = parent;
+                moduleSpecifier = ts.getExternalModuleImportEqualsDeclarationExpression(node);
             }
-            if (parameter.initializer) {
-                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_cannot_have_an_initializer);
+            else if (parent.kind === 233 /* ModuleDeclaration */) {
+                moduleSpecifier = parent.name;
             }
-            if (!parameter.type) {
-                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_must_have_a_type_annotation);
+            else {
+                var node = parent;
+                moduleSpecifier = node.moduleSpecifier;
             }
-            if (parameter.type.kind !== 132 /* StringKeyword */ && parameter.type.kind !== 130 /* NumberKeyword */) {
-                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_type_must_be_string_or_number);
+            if (moduleSpecifier.kind === 9 /* StringLiteral */ && isBundledEmit && (compilerOptions.out || compilerOptions.outFile)) {
+                var moduleName = ts.getExternalModuleNameFromDeclaration(host, resolver, parent);
+                if (moduleName) {
+                    write('"');
+                    write(moduleName);
+                    write('"');
+                    return;
+                }
             }
-            if (!node.type) {
-                return grammarErrorOnNode(node, ts.Diagnostics.An_index_signature_must_have_a_type_annotation);
+            writeTextOfNode(currentText, moduleSpecifier);
+        }
+        function emitImportOrExportSpecifier(node) {
+            if (node.propertyName) {
+                writeTextOfNode(currentText, node.propertyName);
+                write(" as ");
             }
+            writeTextOfNode(currentText, node.name);
         }
-        function checkGrammarIndexSignature(node) {
-            // Prevent cascading error by short-circuit
-            return checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarIndexSignatureParameters(node);
+        function emitExportSpecifier(node) {
+            emitImportOrExportSpecifier(node);
+            // Make all the declarations visible for the export name
+            var nodes = resolver.collectLinkedAliases(node.propertyName || node.name);
+            // write each of these declarations asynchronously
+            writeAsynchronousModuleElements(nodes);
         }
-        function checkGrammarForAtLeastOneTypeArgument(node, typeArguments) {
-            if (typeArguments && typeArguments.length === 0) {
-                var sourceFile = ts.getSourceFileOfNode(node);
-                var start = typeArguments.pos - "<".length;
-                var end = ts.skipTrivia(sourceFile.text, typeArguments.end) + ">".length;
-                return grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.Type_argument_list_cannot_be_empty);
+        function emitExportDeclaration(node) {
+            emitJsDocComments(node);
+            write("export ");
+            if (node.exportClause) {
+                write("{ ");
+                emitCommaList(node.exportClause.elements, emitExportSpecifier);
+                write(" }");
             }
+            else {
+                write("*");
+            }
+            if (node.moduleSpecifier) {
+                write(" from ");
+                emitExternalModuleSpecifier(node);
+            }
+            write(";");
+            writer.writeLine();
         }
-        function checkGrammarTypeArguments(node, typeArguments) {
-            return checkGrammarForDisallowedTrailingComma(typeArguments) ||
-                checkGrammarForAtLeastOneTypeArgument(node, typeArguments);
-        }
-        function checkGrammarForOmittedArgument(node, args) {
-            if (args) {
-                var sourceFile = ts.getSourceFileOfNode(node);
-                for (var _i = 0, args_4 = args; _i < args_4.length; _i++) {
-                    var arg = args_4[_i];
-                    if (arg.kind === 193 /* OmittedExpression */) {
-                        return grammarErrorAtPos(sourceFile, arg.pos, 0, ts.Diagnostics.Argument_expression_expected);
-                    }
+        function writeModuleDeclaration(node) {
+            emitJsDocComments(node);
+            emitModuleElementDeclarationFlags(node);
+            if (ts.isGlobalScopeAugmentation(node)) {
+                write("global ");
+            }
+            else {
+                if (node.flags & 16 /* Namespace */) {
+                    write("namespace ");
+                }
+                else {
+                    write("module ");
+                }
+                if (ts.isExternalModuleAugmentation(node)) {
+                    emitExternalModuleSpecifier(node);
+                }
+                else {
+                    writeTextOfNode(currentText, node.name);
                 }
             }
+            while (node.body && node.body.kind !== 234 /* ModuleBlock */) {
+                node = node.body;
+                write(".");
+                writeTextOfNode(currentText, node.name);
+            }
+            var prevEnclosingDeclaration = enclosingDeclaration;
+            if (node.body) {
+                enclosingDeclaration = node;
+                write(" {");
+                writeLine();
+                increaseIndent();
+                emitLines(node.body.statements);
+                decreaseIndent();
+                write("}");
+                writeLine();
+                enclosingDeclaration = prevEnclosingDeclaration;
+            }
+            else {
+                write(";");
+            }
         }
-        function checkGrammarArguments(node, args) {
-            return checkGrammarForOmittedArgument(node, args);
+        function writeTypeAliasDeclaration(node) {
+            var prevEnclosingDeclaration = enclosingDeclaration;
+            enclosingDeclaration = node;
+            emitJsDocComments(node);
+            emitModuleElementDeclarationFlags(node);
+            write("type ");
+            writeTextOfNode(currentText, node.name);
+            emitTypeParameters(node.typeParameters);
+            write(" = ");
+            emitTypeWithNewGetSymbolAccessibilityDiagnostic(node.type, getTypeAliasDeclarationVisibilityError);
+            write(";");
+            writeLine();
+            enclosingDeclaration = prevEnclosingDeclaration;
+            function getTypeAliasDeclarationVisibilityError() {
+                return {
+                    diagnosticMessage: ts.Diagnostics.Exported_type_alias_0_has_or_is_using_private_name_1,
+                    errorNode: node.type,
+                    typeName: node.name
+                };
+            }
         }
-        function checkGrammarHeritageClause(node) {
-            var types = node.types;
-            if (checkGrammarForDisallowedTrailingComma(types)) {
-                return true;
+        function writeEnumDeclaration(node) {
+            emitJsDocComments(node);
+            emitModuleElementDeclarationFlags(node);
+            if (ts.isConst(node)) {
+                write("const ");
             }
-            if (types && types.length === 0) {
-                var listType = ts.tokenToString(node.token);
-                var sourceFile = ts.getSourceFileOfNode(node);
-                return grammarErrorAtPos(sourceFile, types.pos, 0, ts.Diagnostics._0_list_cannot_be_empty, listType);
+            write("enum ");
+            writeTextOfNode(currentText, node.name);
+            write(" {");
+            writeLine();
+            increaseIndent();
+            emitLines(node.members);
+            decreaseIndent();
+            write("}");
+            writeLine();
+        }
+        function emitEnumMemberDeclaration(node) {
+            emitJsDocComments(node);
+            writeTextOfNode(currentText, node.name);
+            var enumMemberValue = resolver.getConstantValue(node);
+            if (enumMemberValue !== undefined) {
+                write(" = ");
+                write(ts.getTextOfConstantValue(enumMemberValue));
             }
+            write(",");
+            writeLine();
         }
-        function checkGrammarClassDeclarationHeritageClauses(node) {
-            var seenExtendsClause = false;
-            var seenImplementsClause = false;
-            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && node.heritageClauses) {
-                for (var _i = 0, _a = node.heritageClauses; _i < _a.length; _i++) {
-                    var heritageClause = _a[_i];
-                    if (heritageClause.token === 83 /* ExtendsKeyword */) {
-                        if (seenExtendsClause) {
-                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.extends_clause_already_seen);
-                        }
-                        if (seenImplementsClause) {
-                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.extends_clause_must_precede_implements_clause);
-                        }
-                        if (heritageClause.types.length > 1) {
-                            return grammarErrorOnFirstToken(heritageClause.types[1], ts.Diagnostics.Classes_can_only_extend_a_single_class);
-                        }
-                        seenExtendsClause = true;
+        function isPrivateMethodTypeParameter(node) {
+            return node.parent.kind === 151 /* MethodDeclaration */ && ts.hasModifier(node.parent, 8 /* Private */);
+        }
+        function emitTypeParameters(typeParameters) {
+            function emitTypeParameter(node) {
+                increaseIndent();
+                emitJsDocComments(node);
+                decreaseIndent();
+                writeTextOfNode(currentText, node.name);
+                // If there is constraint present and this is not a type parameter of the private method emit the constraint
+                if (node.constraint && !isPrivateMethodTypeParameter(node)) {
+                    write(" extends ");
+                    if (node.parent.kind === 160 /* FunctionType */ ||
+                        node.parent.kind === 161 /* ConstructorType */ ||
+                        (node.parent.parent && node.parent.parent.kind === 163 /* TypeLiteral */)) {
+                        ts.Debug.assert(node.parent.kind === 151 /* MethodDeclaration */ ||
+                            node.parent.kind === 150 /* MethodSignature */ ||
+                            node.parent.kind === 160 /* FunctionType */ ||
+                            node.parent.kind === 161 /* ConstructorType */ ||
+                            node.parent.kind === 155 /* CallSignature */ ||
+                            node.parent.kind === 156 /* ConstructSignature */);
+                        emitType(node.constraint);
                     }
                     else {
-                        ts.Debug.assert(heritageClause.token === 106 /* ImplementsKeyword */);
-                        if (seenImplementsClause) {
-                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.implements_clause_already_seen);
-                        }
-                        seenImplementsClause = true;
+                        emitTypeWithNewGetSymbolAccessibilityDiagnostic(node.constraint, getTypeParameterConstraintVisibilityError);
                     }
-                    // Grammar checking heritageClause inside class declaration
-                    checkGrammarHeritageClause(heritageClause);
                 }
-            }
-        }
-        function checkGrammarInterfaceDeclaration(node) {
-            var seenExtendsClause = false;
-            if (node.heritageClauses) {
-                for (var _i = 0, _a = node.heritageClauses; _i < _a.length; _i++) {
-                    var heritageClause = _a[_i];
-                    if (heritageClause.token === 83 /* ExtendsKeyword */) {
-                        if (seenExtendsClause) {
-                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.extends_clause_already_seen);
-                        }
-                        seenExtendsClause = true;
+                if (node.default && !isPrivateMethodTypeParameter(node)) {
+                    write(" = ");
+                    if (node.parent.kind === 160 /* FunctionType */ ||
+                        node.parent.kind === 161 /* ConstructorType */ ||
+                        (node.parent.parent && node.parent.parent.kind === 163 /* TypeLiteral */)) {
+                        ts.Debug.assert(node.parent.kind === 151 /* MethodDeclaration */ ||
+                            node.parent.kind === 150 /* MethodSignature */ ||
+                            node.parent.kind === 160 /* FunctionType */ ||
+                            node.parent.kind === 161 /* ConstructorType */ ||
+                            node.parent.kind === 155 /* CallSignature */ ||
+                            node.parent.kind === 156 /* ConstructSignature */);
+                        emitType(node.default);
                     }
                     else {
-                        ts.Debug.assert(heritageClause.token === 106 /* ImplementsKeyword */);
-                        return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.Interface_declaration_cannot_have_implements_clause);
+                        emitTypeWithNewGetSymbolAccessibilityDiagnostic(node.default, getTypeParameterConstraintVisibilityError);
                     }
-                    // Grammar checking heritageClause inside class declaration
-                    checkGrammarHeritageClause(heritageClause);
+                }
+                function getTypeParameterConstraintVisibilityError() {
+                    // Type parameter constraints are named by user so we should always be able to name it
+                    var diagnosticMessage;
+                    switch (node.parent.kind) {
+                        case 229 /* ClassDeclaration */:
+                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_class_has_or_is_using_private_name_1;
+                            break;
+                        case 230 /* InterfaceDeclaration */:
+                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1;
+                            break;
+                        case 156 /* ConstructSignature */:
+                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1;
+                            break;
+                        case 155 /* CallSignature */:
+                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1;
+                            break;
+                        case 151 /* MethodDeclaration */:
+                        case 150 /* MethodSignature */:
+                            if (ts.hasModifier(node.parent, 32 /* Static */)) {
+                                diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1;
+                            }
+                            else if (node.parent.parent.kind === 229 /* ClassDeclaration */) {
+                                diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1;
+                            }
+                            else {
+                                diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1;
+                            }
+                            break;
+                        case 228 /* FunctionDeclaration */:
+                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_function_has_or_is_using_private_name_1;
+                            break;
+                        case 231 /* TypeAliasDeclaration */:
+                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_type_alias_has_or_is_using_private_name_1;
+                            break;
+                        default:
+                            ts.Debug.fail("This is unknown parent for type parameter: " + node.parent.kind);
+                    }
+                    return {
+                        diagnosticMessage: diagnosticMessage,
+                        errorNode: node,
+                        typeName: node.name
+                    };
                 }
             }
-            return false;
-        }
-        function checkGrammarComputedPropertyName(node) {
-            // If node is not a computedPropertyName, just skip the grammar checking
-            if (node.kind !== 140 /* ComputedPropertyName */) {
-                return false;
-            }
-            var computedPropertyName = node;
-            if (computedPropertyName.expression.kind === 187 /* BinaryExpression */ && computedPropertyName.expression.operatorToken.kind === 24 /* CommaToken */) {
-                return grammarErrorOnNode(computedPropertyName.expression, ts.Diagnostics.A_comma_expression_is_not_allowed_in_a_computed_property_name);
+            if (typeParameters) {
+                write("<");
+                emitCommaList(typeParameters, emitTypeParameter);
+                write(">");
             }
         }
-        function checkGrammarForGenerator(node) {
-            if (node.asteriskToken) {
-                ts.Debug.assert(node.kind === 220 /* FunctionDeclaration */ ||
-                    node.kind === 179 /* FunctionExpression */ ||
-                    node.kind === 147 /* MethodDeclaration */);
-                if (ts.isInAmbientContext(node)) {
-                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.Generators_are_not_allowed_in_an_ambient_context);
+        function emitHeritageClause(typeReferences, isImplementsList) {
+            if (typeReferences) {
+                write(isImplementsList ? " implements " : " extends ");
+                emitCommaList(typeReferences, emitTypeOfTypeReference);
+            }
+            function emitTypeOfTypeReference(node) {
+                if (ts.isEntityNameExpression(node.expression)) {
+                    emitTypeWithNewGetSymbolAccessibilityDiagnostic(node, getHeritageClauseVisibilityError);
                 }
-                if (!node.body) {
-                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.An_overload_signature_cannot_be_declared_as_a_generator);
+                else if (!isImplementsList && node.expression.kind === 95 /* NullKeyword */) {
+                    write("null");
                 }
-                if (languageVersion < 2 /* ES6 */) {
-                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher);
+                function getHeritageClauseVisibilityError() {
+                    var diagnosticMessage;
+                    // Heritage clause is written by user so it can always be named
+                    if (node.parent.parent.kind === 229 /* ClassDeclaration */) {
+                        // Class or Interface implemented/extended is inaccessible
+                        diagnosticMessage = isImplementsList ?
+                            ts.Diagnostics.Implements_clause_of_exported_class_0_has_or_is_using_private_name_1 :
+                            ts.Diagnostics.extends_clause_of_exported_class_0_has_or_is_using_private_name_1;
+                    }
+                    else {
+                        // interface is inaccessible
+                        diagnosticMessage = ts.Diagnostics.extends_clause_of_exported_interface_0_has_or_is_using_private_name_1;
+                    }
+                    return {
+                        diagnosticMessage: diagnosticMessage,
+                        errorNode: node,
+                        typeName: ts.getNameOfDeclaration(node.parent.parent)
+                    };
                 }
             }
         }
-        function checkGrammarForInvalidQuestionMark(node, questionToken, message) {
-            if (questionToken) {
-                return grammarErrorOnNode(questionToken, message);
-            }
-        }
-        function checkGrammarObjectLiteralExpression(node, inDestructuring) {
-            var seen = ts.createMap();
-            var Property = 1;
-            var GetAccessor = 2;
-            var SetAccessor = 4;
-            var GetOrSetAccessor = GetAccessor | SetAccessor;
-            for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
-                var prop = _a[_i];
-                var name_24 = prop.name;
-                if (prop.kind === 193 /* OmittedExpression */ ||
-                    name_24.kind === 140 /* ComputedPropertyName */) {
-                    // If the name is not a ComputedPropertyName, the grammar checking will skip it
-                    checkGrammarComputedPropertyName(name_24);
-                }
-                if (prop.kind === 254 /* ShorthandPropertyAssignment */ && !inDestructuring && prop.objectAssignmentInitializer) {
-                    // having objectAssignmentInitializer is only valid in ObjectAssignmentPattern
-                    // outside of destructuring it is a syntax error
-                    return grammarErrorOnNode(prop.equalsToken, ts.Diagnostics.can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment);
-                }
-                // Modifiers are never allowed on properties except for 'async' on a method declaration
-                if (prop.modifiers) {
-                    for (var _b = 0, _c = prop.modifiers; _b < _c.length; _b++) {
-                        var mod = _c[_b];
-                        if (mod.kind !== 118 /* AsyncKeyword */ || prop.kind !== 147 /* MethodDeclaration */) {
-                            grammarErrorOnNode(mod, ts.Diagnostics._0_modifier_cannot_be_used_here, ts.getTextOfNode(mod));
+        function writeClassDeclaration(node) {
+            function emitParameterProperties(constructorDeclaration) {
+                if (constructorDeclaration) {
+                    ts.forEach(constructorDeclaration.parameters, function (param) {
+                        if (ts.hasModifier(param, 92 /* ParameterPropertyModifier */)) {
+                            emitPropertyDeclaration(param);
                         }
-                    }
+                    });
                 }
-                // ECMA-262 11.1.5 Object Initializer
-                // If previous is not undefined then throw a SyntaxError exception if any of the following conditions are true
-                // a.This production is contained in strict code and IsDataDescriptor(previous) is true and
-                // IsDataDescriptor(propId.descriptor) is true.
-                //    b.IsDataDescriptor(previous) is true and IsAccessorDescriptor(propId.descriptor) is true.
-                //    c.IsAccessorDescriptor(previous) is true and IsDataDescriptor(propId.descriptor) is true.
-                //    d.IsAccessorDescriptor(previous) is true and IsAccessorDescriptor(propId.descriptor) is true
-                // and either both previous and propId.descriptor have[[Get]] fields or both previous and propId.descriptor have[[Set]] fields
-                var currentKind = void 0;
-                if (prop.kind === 253 /* PropertyAssignment */ || prop.kind === 254 /* ShorthandPropertyAssignment */) {
-                    // Grammar checking for computedPropertyName and shorthandPropertyAssignment
-                    checkGrammarForInvalidQuestionMark(prop, prop.questionToken, ts.Diagnostics.An_object_member_cannot_be_declared_optional);
-                    if (name_24.kind === 8 /* NumericLiteral */) {
-                        checkGrammarNumericLiteral(name_24);
+            }
+            var prevEnclosingDeclaration = enclosingDeclaration;
+            enclosingDeclaration = node;
+            var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
+            var tempVarName;
+            if (baseTypeNode && !ts.isEntityNameExpression(baseTypeNode.expression)) {
+                tempVarName = baseTypeNode.expression.kind === 95 /* NullKeyword */ ?
+                    "null" :
+                    emitTempVariableDeclaration(baseTypeNode.expression, node.name.text + "_base", {
+                        diagnosticMessage: ts.Diagnostics.extends_clause_of_exported_class_0_has_or_is_using_private_name_1,
+                        errorNode: baseTypeNode,
+                        typeName: node.name
+                    }, !ts.findAncestor(node, function (n) { return n.kind === 233 /* ModuleDeclaration */; }));
+            }
+            emitJsDocComments(node);
+            emitModuleElementDeclarationFlags(node);
+            if (ts.hasModifier(node, 128 /* Abstract */)) {
+                write("abstract ");
+            }
+            write("class ");
+            writeTextOfNode(currentText, node.name);
+            emitTypeParameters(node.typeParameters);
+            if (baseTypeNode) {
+                if (!ts.isEntityNameExpression(baseTypeNode.expression)) {
+                    write(" extends ");
+                    write(tempVarName);
+                    if (baseTypeNode.typeArguments) {
+                        write("<");
+                        emitCommaList(baseTypeNode.typeArguments, emitType);
+                        write(">");
                     }
-                    currentKind = Property;
-                }
-                else if (prop.kind === 147 /* MethodDeclaration */) {
-                    currentKind = Property;
-                }
-                else if (prop.kind === 149 /* GetAccessor */) {
-                    currentKind = GetAccessor;
-                }
-                else if (prop.kind === 150 /* SetAccessor */) {
-                    currentKind = SetAccessor;
                 }
                 else {
-                    ts.Debug.fail("Unexpected syntax kind:" + prop.kind);
-                }
-                var effectiveName = ts.getPropertyNameForPropertyNameNode(name_24);
-                if (effectiveName === undefined) {
-                    continue;
+                    emitHeritageClause([baseTypeNode], /*isImplementsList*/ false);
                 }
-                if (!seen[effectiveName]) {
-                    seen[effectiveName] = currentKind;
+            }
+            emitHeritageClause(ts.getClassImplementsHeritageClauseElements(node), /*isImplementsList*/ true);
+            write(" {");
+            writeLine();
+            increaseIndent();
+            emitParameterProperties(ts.getFirstConstructorWithBody(node));
+            emitLines(node.members);
+            decreaseIndent();
+            write("}");
+            writeLine();
+            enclosingDeclaration = prevEnclosingDeclaration;
+        }
+        function writeInterfaceDeclaration(node) {
+            emitJsDocComments(node);
+            emitModuleElementDeclarationFlags(node);
+            write("interface ");
+            writeTextOfNode(currentText, node.name);
+            var prevEnclosingDeclaration = enclosingDeclaration;
+            enclosingDeclaration = node;
+            emitTypeParameters(node.typeParameters);
+            var interfaceExtendsTypes = ts.filter(ts.getInterfaceBaseTypeNodes(node), function (base) { return ts.isEntityNameExpression(base.expression); });
+            if (interfaceExtendsTypes && interfaceExtendsTypes.length) {
+                emitHeritageClause(interfaceExtendsTypes, /*isImplementsList*/ false);
+            }
+            write(" {");
+            writeLine();
+            increaseIndent();
+            emitLines(node.members);
+            decreaseIndent();
+            write("}");
+            writeLine();
+            enclosingDeclaration = prevEnclosingDeclaration;
+        }
+        function emitPropertyDeclaration(node) {
+            if (ts.hasDynamicName(node)) {
+                return;
+            }
+            emitJsDocComments(node);
+            emitClassMemberDeclarationFlags(ts.getModifierFlags(node));
+            emitVariableDeclaration(node);
+            write(";");
+            writeLine();
+        }
+        function emitVariableDeclaration(node) {
+            // If we are emitting property it isn't moduleElement and hence we already know it needs to be emitted
+            // so there is no check needed to see if declaration is visible
+            if (node.kind !== 226 /* VariableDeclaration */ || resolver.isDeclarationVisible(node)) {
+                if (ts.isBindingPattern(node.name)) {
+                    emitBindingPattern(node.name);
                 }
                 else {
-                    var existingKind = seen[effectiveName];
-                    if (currentKind === Property && existingKind === Property) {
-                        grammarErrorOnNode(name_24, ts.Diagnostics.Duplicate_identifier_0, ts.getTextOfNode(name_24));
+                    // If this node is a computed name, it can only be a symbol, because we've already skipped
+                    // it if it's not a well known symbol. In that case, the text of the name will be exactly
+                    // what we want, namely the name expression enclosed in brackets.
+                    writeTextOfNode(currentText, node.name);
+                    // If optional property emit ? but in the case of parameterProperty declaration with "?" indicating optional parameter for the constructor
+                    // we don't want to emit property declaration with "?"
+                    if ((node.kind === 149 /* PropertyDeclaration */ || node.kind === 148 /* PropertySignature */ ||
+                        (node.kind === 146 /* Parameter */ && !ts.isParameterPropertyDeclaration(node))) && ts.hasQuestionToken(node)) {
+                        write("?");
                     }
-                    else if ((currentKind & GetOrSetAccessor) && (existingKind & GetOrSetAccessor)) {
-                        if (existingKind !== GetOrSetAccessor && currentKind !== existingKind) {
-                            seen[effectiveName] = currentKind | existingKind;
-                        }
-                        else {
-                            return grammarErrorOnNode(name_24, ts.Diagnostics.An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name);
-                        }
+                    if ((node.kind === 149 /* PropertyDeclaration */ || node.kind === 148 /* PropertySignature */) && node.parent.kind === 163 /* TypeLiteral */) {
+                        emitTypeOfVariableDeclarationFromTypeLiteral(node);
                     }
-                    else {
-                        return grammarErrorOnNode(name_24, ts.Diagnostics.An_object_literal_cannot_have_property_and_accessor_with_the_same_name);
+                    else if (resolver.isLiteralConstDeclaration(node)) {
+                        write(" = ");
+                        resolver.writeLiteralConstValue(node, writer);
+                    }
+                    else if (!ts.hasModifier(node, 8 /* Private */)) {
+                        writeTypeOfDeclaration(node, node.type, getVariableDeclarationTypeVisibilityError);
                     }
                 }
             }
-        }
-        function checkGrammarJsxElement(node) {
-            var seen = ts.createMap();
-            for (var _i = 0, _a = node.attributes; _i < _a.length; _i++) {
-                var attr = _a[_i];
-                if (attr.kind === 247 /* JsxSpreadAttribute */) {
-                    continue;
-                }
-                var jsxAttr = attr;
-                var name_25 = jsxAttr.name;
-                if (!seen[name_25.text]) {
-                    seen[name_25.text] = true;
-                }
-                else {
-                    return grammarErrorOnNode(name_25, ts.Diagnostics.JSX_elements_cannot_have_multiple_attributes_with_the_same_name);
-                }
-                var initializer = jsxAttr.initializer;
-                if (initializer && initializer.kind === 248 /* JsxExpression */ && !initializer.expression) {
-                    return grammarErrorOnNode(jsxAttr.initializer, ts.Diagnostics.JSX_attributes_must_only_be_assigned_a_non_empty_expression);
-                }
-            }
-        }
-        function checkGrammarForInOrForOfStatement(forInOrOfStatement) {
-            if (checkGrammarStatementInAmbientContext(forInOrOfStatement)) {
-                return true;
-            }
-            if (forInOrOfStatement.initializer.kind === 219 /* VariableDeclarationList */) {
-                var variableList = forInOrOfStatement.initializer;
-                if (!checkGrammarVariableDeclarationList(variableList)) {
-                    var declarations = variableList.declarations;
-                    // declarations.length can be zero if there is an error in variable declaration in for-of or for-in
-                    // See http://www.ecma-international.org/ecma-262/6.0/#sec-for-in-and-for-of-statements for details
-                    // For example:
-                    //      var let = 10;
-                    //      for (let of [1,2,3]) {} // this is invalid ES6 syntax
-                    //      for (let in [1,2,3]) {} // this is invalid ES6 syntax
-                    // We will then want to skip on grammar checking on variableList declaration
-                    if (!declarations.length) {
-                        return false;
-                    }
-                    if (declarations.length > 1) {
-                        var diagnostic = forInOrOfStatement.kind === 207 /* ForInStatement */
-                            ? ts.Diagnostics.Only_a_single_variable_declaration_is_allowed_in_a_for_in_statement
-                            : ts.Diagnostics.Only_a_single_variable_declaration_is_allowed_in_a_for_of_statement;
-                        return grammarErrorOnFirstToken(variableList.declarations[1], diagnostic);
+            function getVariableDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult) {
+                if (node.kind === 226 /* VariableDeclaration */) {
+                    return symbolAccessibilityResult.errorModuleName ?
+                        symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                            ts.Diagnostics.Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                            ts.Diagnostics.Exported_variable_0_has_or_is_using_name_1_from_private_module_2 :
+                        ts.Diagnostics.Exported_variable_0_has_or_is_using_private_name_1;
+                }
+                else if (node.kind === 149 /* PropertyDeclaration */ || node.kind === 148 /* PropertySignature */ ||
+                    (node.kind === 146 /* Parameter */ && ts.hasModifier(node.parent, 8 /* Private */))) {
+                    // TODO(jfreeman): Deal with computed properties in error reporting.
+                    if (ts.hasModifier(node, 32 /* Static */)) {
+                        return symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                                ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                                ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_private_name_1;
                     }
-                    var firstDeclaration = declarations[0];
-                    if (firstDeclaration.initializer) {
-                        var diagnostic = forInOrOfStatement.kind === 207 /* ForInStatement */
-                            ? ts.Diagnostics.The_variable_declaration_of_a_for_in_statement_cannot_have_an_initializer
-                            : ts.Diagnostics.The_variable_declaration_of_a_for_of_statement_cannot_have_an_initializer;
-                        return grammarErrorOnNode(firstDeclaration.name, diagnostic);
+                    else if (node.parent.kind === 229 /* ClassDeclaration */ || node.kind === 146 /* Parameter */) {
+                        return symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                                ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                                ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_private_name_1;
                     }
-                    if (firstDeclaration.type) {
-                        var diagnostic = forInOrOfStatement.kind === 207 /* ForInStatement */
-                            ? ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation
-                            : ts.Diagnostics.The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation;
-                        return grammarErrorOnNode(firstDeclaration, diagnostic);
+                    else {
+                        // Interfaces cannot have types that cannot be named
+                        return symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Property_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Property_0_of_exported_interface_has_or_is_using_private_name_1;
                     }
                 }
             }
-            return false;
-        }
-        function checkGrammarAccessor(accessor) {
-            var kind = accessor.kind;
-            if (languageVersion < 1 /* ES5 */) {
-                return grammarErrorOnNode(accessor.name, ts.Diagnostics.Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher);
-            }
-            else if (ts.isInAmbientContext(accessor)) {
-                return grammarErrorOnNode(accessor.name, ts.Diagnostics.An_accessor_cannot_be_declared_in_an_ambient_context);
-            }
-            else if (accessor.body === undefined && !(ts.getModifierFlags(accessor) & 128 /* Abstract */)) {
-                return grammarErrorAtPos(ts.getSourceFileOfNode(accessor), accessor.end - 1, ";".length, ts.Diagnostics._0_expected, "{");
-            }
-            else if (accessor.typeParameters) {
-                return grammarErrorOnNode(accessor.name, ts.Diagnostics.An_accessor_cannot_have_type_parameters);
+            function getVariableDeclarationTypeVisibilityError(symbolAccessibilityResult) {
+                var diagnosticMessage = getVariableDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult);
+                return diagnosticMessage !== undefined ? {
+                    diagnosticMessage: diagnosticMessage,
+                    errorNode: node,
+                    typeName: node.name
+                } : undefined;
             }
-            else if (!doesAccessorHaveCorrectParameterCount(accessor)) {
-                return grammarErrorOnNode(accessor.name, kind === 149 /* GetAccessor */ ?
-                    ts.Diagnostics.A_get_accessor_cannot_have_parameters :
-                    ts.Diagnostics.A_set_accessor_must_have_exactly_one_parameter);
+            function emitBindingPattern(bindingPattern) {
+                // Only select non-omitted expression from the bindingPattern's elements.
+                // We have to do this to avoid emitting trailing commas.
+                // For example:
+                //      original: var [, c,,] = [ 2,3,4]
+                //      emitted: declare var c: number; // instead of declare var c:number, ;
+                var elements = [];
+                for (var _i = 0, _a = bindingPattern.elements; _i < _a.length; _i++) {
+                    var element = _a[_i];
+                    if (element.kind !== 200 /* OmittedExpression */) {
+                        elements.push(element);
+                    }
+                }
+                emitCommaList(elements, emitBindingElement);
             }
-            else if (kind === 150 /* SetAccessor */) {
-                if (accessor.type) {
-                    return grammarErrorOnNode(accessor.name, ts.Diagnostics.A_set_accessor_cannot_have_a_return_type_annotation);
+            function emitBindingElement(bindingElement) {
+                function getBindingElementTypeVisibilityError(symbolAccessibilityResult) {
+                    var diagnosticMessage = getVariableDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult);
+                    return diagnosticMessage !== undefined ? {
+                        diagnosticMessage: diagnosticMessage,
+                        errorNode: bindingElement,
+                        typeName: bindingElement.name
+                    } : undefined;
                 }
-                else {
-                    var parameter = accessor.parameters[0];
-                    if (parameter.dotDotDotToken) {
-                        return grammarErrorOnNode(parameter.dotDotDotToken, ts.Diagnostics.A_set_accessor_cannot_have_rest_parameter);
-                    }
-                    else if (parameter.questionToken) {
-                        return grammarErrorOnNode(parameter.questionToken, ts.Diagnostics.A_set_accessor_cannot_have_an_optional_parameter);
+                if (bindingElement.name) {
+                    if (ts.isBindingPattern(bindingElement.name)) {
+                        emitBindingPattern(bindingElement.name);
                     }
-                    else if (parameter.initializer) {
-                        return grammarErrorOnNode(accessor.name, ts.Diagnostics.A_set_accessor_parameter_cannot_have_an_initializer);
+                    else {
+                        writeTextOfNode(currentText, bindingElement.name);
+                        writeTypeOfDeclaration(bindingElement, /*type*/ undefined, getBindingElementTypeVisibilityError);
                     }
                 }
             }
         }
-        /** Does the accessor have the right number of parameters?
-
-            A get accessor has no parameters or a single `this` parameter.
-            A set accessor has one parameter or a `this` parameter and one more parameter */
-        function doesAccessorHaveCorrectParameterCount(accessor) {
-            return getAccessorThisParameter(accessor) || accessor.parameters.length === (accessor.kind === 149 /* GetAccessor */ ? 0 : 1);
-        }
-        function getAccessorThisParameter(accessor) {
-            if (accessor.parameters.length === (accessor.kind === 149 /* GetAccessor */ ? 1 : 2) &&
-                accessor.parameters[0].name.kind === 69 /* Identifier */ &&
-                accessor.parameters[0].name.originalKeywordKind === 97 /* ThisKeyword */) {
-                return accessor.parameters[0];
+        function emitTypeOfVariableDeclarationFromTypeLiteral(node) {
+            // if this is property of type literal,
+            // or is parameter of method/call/construct/index signature of type literal
+            // emit only if type is specified
+            if (node.type) {
+                write(": ");
+                emitType(node.type);
             }
         }
-        function getFunctionLikeThisParameter(func) {
-            if (func.parameters.length &&
-                func.parameters[0].name.kind === 69 /* Identifier */ &&
-                func.parameters[0].name.originalKeywordKind === 97 /* ThisKeyword */) {
-                return func.parameters[0];
-            }
+        function isVariableStatementVisible(node) {
+            return ts.forEach(node.declarationList.declarations, function (varDeclaration) { return resolver.isDeclarationVisible(varDeclaration); });
         }
-        function checkGrammarForNonSymbolComputedProperty(node, message) {
-            if (ts.isDynamicName(node)) {
-                return grammarErrorOnNode(node, message);
+        function writeVariableStatement(node) {
+            emitJsDocComments(node);
+            emitModuleElementDeclarationFlags(node);
+            if (ts.isLet(node.declarationList)) {
+                write("let ");
+            }
+            else if (ts.isConst(node.declarationList)) {
+                write("const ");
+            }
+            else {
+                write("var ");
             }
+            emitCommaList(node.declarationList.declarations, emitVariableDeclaration, resolver.isDeclarationVisible);
+            write(";");
+            writeLine();
         }
-        function checkGrammarMethod(node) {
-            if (checkGrammarDisallowedModifiersOnObjectLiteralExpressionMethod(node) ||
-                checkGrammarFunctionLikeDeclaration(node) ||
-                checkGrammarForGenerator(node)) {
-                return true;
+        function emitAccessorDeclaration(node) {
+            if (ts.hasDynamicName(node)) {
+                return;
             }
-            if (node.parent.kind === 171 /* ObjectLiteralExpression */) {
-                if (checkGrammarForInvalidQuestionMark(node, node.questionToken, ts.Diagnostics.An_object_member_cannot_be_declared_optional)) {
-                    return true;
+            var accessors = ts.getAllAccessorDeclarations(node.parent.members, node);
+            var accessorWithTypeAnnotation;
+            if (node === accessors.firstAccessor) {
+                emitJsDocComments(accessors.getAccessor);
+                emitJsDocComments(accessors.setAccessor);
+                emitClassMemberDeclarationFlags(ts.getModifierFlags(node) | (accessors.setAccessor ? 0 : 64 /* Readonly */));
+                writeTextOfNode(currentText, node.name);
+                if (!ts.hasModifier(node, 8 /* Private */)) {
+                    accessorWithTypeAnnotation = node;
+                    var type = getTypeAnnotationFromAccessor(node);
+                    if (!type) {
+                        // couldn't get type for the first accessor, try the another one
+                        var anotherAccessor = node.kind === 153 /* GetAccessor */ ? accessors.setAccessor : accessors.getAccessor;
+                        type = getTypeAnnotationFromAccessor(anotherAccessor);
+                        if (type) {
+                            accessorWithTypeAnnotation = anotherAccessor;
+                        }
+                    }
+                    writeTypeOfDeclaration(node, type, getAccessorDeclarationTypeVisibilityError);
                 }
-                else if (node.body === undefined) {
-                    return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.end - 1, ";".length, ts.Diagnostics._0_expected, "{");
+                write(";");
+                writeLine();
+            }
+            function getTypeAnnotationFromAccessor(accessor) {
+                if (accessor) {
+                    return accessor.kind === 153 /* GetAccessor */
+                        ? accessor.type // Getter - return type
+                        : accessor.parameters.length > 0
+                            ? accessor.parameters[0].type // Setter parameter type
+                            : undefined;
                 }
             }
-            if (ts.isClassLike(node.parent)) {
-                // Technically, computed properties in ambient contexts is disallowed
-                // for property declarations and accessors too, not just methods.
-                // However, property declarations disallow computed names in general,
-                // and accessors are not allowed in ambient contexts in general,
-                // so this error only really matters for methods.
-                if (ts.isInAmbientContext(node)) {
-                    return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_an_ambient_context_must_directly_refer_to_a_built_in_symbol);
+            function getAccessorDeclarationTypeVisibilityError(symbolAccessibilityResult) {
+                var diagnosticMessage;
+                if (accessorWithTypeAnnotation.kind === 154 /* SetAccessor */) {
+                    // Setters have to have type named and cannot infer it so, the type should always be named
+                    if (ts.hasModifier(accessorWithTypeAnnotation.parent, 32 /* Static */)) {
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_private_name_1;
+                    }
+                    else {
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_private_name_1;
+                    }
+                    return {
+                        diagnosticMessage: diagnosticMessage,
+                        errorNode: accessorWithTypeAnnotation.parameters[0],
+                        // TODO(jfreeman): Investigate why we are passing node.name instead of node.parameters[0].name
+                        typeName: accessorWithTypeAnnotation.name
+                    };
                 }
-                else if (!node.body) {
-                    return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_method_overload_must_directly_refer_to_a_built_in_symbol);
+                else {
+                    if (ts.hasModifier(accessorWithTypeAnnotation, 32 /* Static */)) {
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                                ts.Diagnostics.Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
+                                ts.Diagnostics.Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
+                            ts.Diagnostics.Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_private_name_0;
+                    }
+                    else {
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                                ts.Diagnostics.Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
+                                ts.Diagnostics.Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
+                            ts.Diagnostics.Return_type_of_public_property_getter_from_exported_class_has_or_is_using_private_name_0;
+                    }
+                    return {
+                        diagnosticMessage: diagnosticMessage,
+                        errorNode: accessorWithTypeAnnotation.name,
+                        typeName: undefined
+                    };
                 }
             }
-            else if (node.parent.kind === 222 /* InterfaceDeclaration */) {
-                return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol);
-            }
-            else if (node.parent.kind === 159 /* TypeLiteral */) {
-                return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol);
-            }
         }
-        function checkGrammarBreakOrContinueStatement(node) {
-            var current = node;
-            while (current) {
-                if (ts.isFunctionLike(current)) {
-                    return grammarErrorOnNode(node, ts.Diagnostics.Jump_target_cannot_cross_function_boundary);
+        function writeFunctionDeclaration(node) {
+            if (ts.hasDynamicName(node)) {
+                return;
+            }
+            // If we are emitting Method/Constructor it isn't moduleElement and hence already determined to be emitting
+            // so no need to verify if the declaration is visible
+            if (!resolver.isImplementationOfOverload(node)) {
+                emitJsDocComments(node);
+                if (node.kind === 228 /* FunctionDeclaration */) {
+                    emitModuleElementDeclarationFlags(node);
                 }
-                switch (current.kind) {
-                    case 214 /* LabeledStatement */:
-                        if (node.label && current.label.text === node.label.text) {
-                            // found matching label - verify that label usage is correct
-                            // continue can only target labels that are on iteration statements
-                            var isMisplacedContinueLabel = node.kind === 209 /* ContinueStatement */
-                                && !ts.isIterationStatement(current.statement, /*lookInLabeledStatement*/ true);
-                            if (isMisplacedContinueLabel) {
-                                return grammarErrorOnNode(node, ts.Diagnostics.A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement);
-                            }
-                            return false;
-                        }
-                        break;
-                    case 213 /* SwitchStatement */:
-                        if (node.kind === 210 /* BreakStatement */ && !node.label) {
-                            // unlabeled break within switch statement - ok
-                            return false;
-                        }
-                        break;
-                    default:
-                        if (ts.isIterationStatement(current, /*lookInLabeledStatement*/ false) && !node.label) {
-                            // unlabeled break or continue within iteration statement - ok
-                            return false;
-                        }
-                        break;
+                else if (node.kind === 151 /* MethodDeclaration */ || node.kind === 152 /* Constructor */) {
+                    emitClassMemberDeclarationFlags(ts.getModifierFlags(node));
                 }
-                current = current.parent;
-            }
-            if (node.label) {
-                var message = node.kind === 210 /* BreakStatement */
-                    ? ts.Diagnostics.A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement
-                    : ts.Diagnostics.A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement;
-                return grammarErrorOnNode(node, message);
-            }
-            else {
-                var message = node.kind === 210 /* BreakStatement */
-                    ? ts.Diagnostics.A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement
-                    : ts.Diagnostics.A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement;
-                return grammarErrorOnNode(node, message);
-            }
-        }
-        function checkGrammarBindingElement(node) {
-            if (node.dotDotDotToken) {
-                var elements = node.parent.elements;
-                if (node !== ts.lastOrUndefined(elements)) {
-                    return grammarErrorOnNode(node, ts.Diagnostics.A_rest_element_must_be_last_in_an_array_destructuring_pattern);
+                if (node.kind === 228 /* FunctionDeclaration */) {
+                    write("function ");
+                    writeTextOfNode(currentText, node.name);
                 }
-                if (node.name.kind === 168 /* ArrayBindingPattern */ || node.name.kind === 167 /* ObjectBindingPattern */) {
-                    return grammarErrorOnNode(node.name, ts.Diagnostics.A_rest_element_cannot_contain_a_binding_pattern);
+                else if (node.kind === 152 /* Constructor */) {
+                    write("constructor");
                 }
-                if (node.initializer) {
-                    // Error on equals token which immediate precedes the initializer
-                    return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.initializer.pos - 1, 1, ts.Diagnostics.A_rest_element_cannot_have_an_initializer);
+                else {
+                    writeTextOfNode(currentText, node.name);
+                    if (ts.hasQuestionToken(node)) {
+                        write("?");
+                    }
                 }
+                emitSignatureDeclaration(node);
             }
         }
-        function isStringOrNumberLiteralExpression(expr) {
-            return expr.kind === 9 /* StringLiteral */ || expr.kind === 8 /* NumericLiteral */ ||
-                expr.kind === 185 /* PrefixUnaryExpression */ && expr.operator === 36 /* MinusToken */ &&
-                    expr.operand.kind === 8 /* NumericLiteral */;
+        function emitSignatureDeclarationWithJsDocComments(node) {
+            emitJsDocComments(node);
+            emitSignatureDeclaration(node);
         }
-        function checkGrammarVariableDeclaration(node) {
-            if (node.parent.parent.kind !== 207 /* ForInStatement */ && node.parent.parent.kind !== 208 /* ForOfStatement */) {
-                if (ts.isInAmbientContext(node)) {
-                    if (node.initializer) {
-                        if (ts.isConst(node) && !node.type) {
-                            if (!isStringOrNumberLiteralExpression(node.initializer)) {
-                                return grammarErrorOnNode(node.initializer, ts.Diagnostics.A_const_initializer_in_an_ambient_context_must_be_a_string_or_numeric_literal);
-                            }
-                        }
-                        else {
-                            // Error on equals token which immediate precedes the initializer
-                            var equalsTokenLength = "=".length;
-                            return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.initializer.pos - equalsTokenLength, equalsTokenLength, ts.Diagnostics.Initializers_are_not_allowed_in_ambient_contexts);
-                        }
-                    }
-                    if (node.initializer && !(ts.isConst(node) && isStringOrNumberLiteralExpression(node.initializer))) {
-                        // Error on equals token which immediate precedes the initializer
-                        var equalsTokenLength = "=".length;
-                        return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.initializer.pos - equalsTokenLength, equalsTokenLength, ts.Diagnostics.Initializers_are_not_allowed_in_ambient_contexts);
-                    }
+        function emitSignatureDeclaration(node) {
+            var prevEnclosingDeclaration = enclosingDeclaration;
+            enclosingDeclaration = node;
+            var closeParenthesizedFunctionType = false;
+            if (node.kind === 157 /* IndexSignature */) {
+                // Index signature can have readonly modifier
+                emitClassMemberDeclarationFlags(ts.getModifierFlags(node));
+                write("[");
+            }
+            else {
+                if (node.kind === 152 /* Constructor */ && ts.hasModifier(node, 8 /* Private */)) {
+                    write("();");
+                    writeLine();
+                    return;
                 }
-                else if (!node.initializer) {
-                    if (ts.isBindingPattern(node.name) && !ts.isBindingPattern(node.parent)) {
-                        return grammarErrorOnNode(node, ts.Diagnostics.A_destructuring_declaration_must_have_an_initializer);
-                    }
-                    if (ts.isConst(node)) {
-                        return grammarErrorOnNode(node, ts.Diagnostics.const_declarations_must_be_initialized);
+                // Construct signature or constructor type write new Signature
+                if (node.kind === 156 /* ConstructSignature */ || node.kind === 161 /* ConstructorType */) {
+                    write("new ");
+                }
+                else if (node.kind === 160 /* FunctionType */) {
+                    var currentOutput = writer.getText();
+                    // Do not generate incorrect type when function type with type parameters is type argument
+                    // This could happen if user used space between two '<' making it error free
+                    // e.g var x: A< <Tany>(a: Tany)=>Tany>;
+                    if (node.typeParameters && currentOutput.charAt(currentOutput.length - 1) === "<") {
+                        closeParenthesizedFunctionType = true;
+                        write("(");
                     }
                 }
+                emitTypeParameters(node.typeParameters);
+                write("(");
             }
-            var checkLetConstNames = (ts.isLet(node) || ts.isConst(node));
-            // 1. LexicalDeclaration : LetOrConst BindingList ;
-            // It is a Syntax Error if the BoundNames of BindingList contains "let".
-            // 2. ForDeclaration: ForDeclaration : LetOrConst ForBinding
-            // It is a Syntax Error if the BoundNames of ForDeclaration contains "let".
-            // It is a SyntaxError if a VariableDeclaration or VariableDeclarationNoIn occurs within strict code
-            // and its Identifier is eval or arguments
-            return checkLetConstNames && checkGrammarNameInLetOrConstDeclarations(node.name);
-        }
-        function checkGrammarNameInLetOrConstDeclarations(name) {
-            if (name.kind === 69 /* Identifier */) {
-                if (name.originalKeywordKind === 108 /* LetKeyword */) {
-                    return grammarErrorOnNode(name, ts.Diagnostics.let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations);
-                }
+            // Parameters
+            emitCommaList(node.parameters, emitParameterDeclaration);
+            if (node.kind === 157 /* IndexSignature */) {
+                write("]");
             }
             else {
-                var elements = name.elements;
-                for (var _i = 0, elements_2 = elements; _i < elements_2.length; _i++) {
-                    var element = elements_2[_i];
-                    if (!ts.isOmittedExpression(element)) {
-                        checkGrammarNameInLetOrConstDeclarations(element.name);
-                    }
+                write(")");
+            }
+            // If this is not a constructor and is not private, emit the return type
+            var isFunctionTypeOrConstructorType = node.kind === 160 /* FunctionType */ || node.kind === 161 /* ConstructorType */;
+            if (isFunctionTypeOrConstructorType || node.parent.kind === 163 /* TypeLiteral */) {
+                // Emit type literal signature return type only if specified
+                if (node.type) {
+                    write(isFunctionTypeOrConstructorType ? " => " : ": ");
+                    emitType(node.type);
                 }
             }
-        }
-        function checkGrammarVariableDeclarationList(declarationList) {
-            var declarations = declarationList.declarations;
-            if (checkGrammarForDisallowedTrailingComma(declarationList.declarations)) {
-                return true;
+            else if (node.kind !== 152 /* Constructor */ && !ts.hasModifier(node, 8 /* Private */)) {
+                writeReturnTypeAtSignature(node, getReturnTypeVisibilityError);
             }
-            if (!declarationList.declarations.length) {
-                return grammarErrorAtPos(ts.getSourceFileOfNode(declarationList), declarations.pos, declarations.end - declarations.pos, ts.Diagnostics.Variable_declaration_list_cannot_be_empty);
+            enclosingDeclaration = prevEnclosingDeclaration;
+            if (!isFunctionTypeOrConstructorType) {
+                write(";");
+                writeLine();
             }
-        }
-        function allowLetAndConstDeclarations(parent) {
-            switch (parent.kind) {
-                case 203 /* IfStatement */:
-                case 204 /* DoStatement */:
-                case 205 /* WhileStatement */:
-                case 212 /* WithStatement */:
-                case 206 /* ForStatement */:
-                case 207 /* ForInStatement */:
-                case 208 /* ForOfStatement */:
-                    return false;
-                case 214 /* LabeledStatement */:
-                    return allowLetAndConstDeclarations(parent.parent);
+            else if (closeParenthesizedFunctionType) {
+                write(")");
             }
-            return true;
-        }
-        function checkGrammarForDisallowedLetOrConstStatement(node) {
-            if (!allowLetAndConstDeclarations(node.parent)) {
-                if (ts.isLet(node.declarationList)) {
-                    return grammarErrorOnNode(node, ts.Diagnostics.let_declarations_can_only_be_declared_inside_a_block);
-                }
-                else if (ts.isConst(node.declarationList)) {
-                    return grammarErrorOnNode(node, ts.Diagnostics.const_declarations_can_only_be_declared_inside_a_block);
+            function getReturnTypeVisibilityError(symbolAccessibilityResult) {
+                var diagnosticMessage;
+                switch (node.kind) {
+                    case 156 /* ConstructSignature */:
+                        // Interfaces cannot have return types that cannot be named
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
+                            ts.Diagnostics.Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_0;
+                        break;
+                    case 155 /* CallSignature */:
+                        // Interfaces cannot have return types that cannot be named
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Return_type_of_call_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
+                            ts.Diagnostics.Return_type_of_call_signature_from_exported_interface_has_or_is_using_private_name_0;
+                        break;
+                    case 157 /* IndexSignature */:
+                        // Interfaces cannot have return types that cannot be named
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Return_type_of_index_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
+                            ts.Diagnostics.Return_type_of_index_signature_from_exported_interface_has_or_is_using_private_name_0;
+                        break;
+                    case 151 /* MethodDeclaration */:
+                    case 150 /* MethodSignature */:
+                        if (ts.hasModifier(node, 32 /* Static */)) {
+                            diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                                symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                                    ts.Diagnostics.Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
+                                    ts.Diagnostics.Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
+                                ts.Diagnostics.Return_type_of_public_static_method_from_exported_class_has_or_is_using_private_name_0;
+                        }
+                        else if (node.parent.kind === 229 /* ClassDeclaration */) {
+                            diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                                symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                                    ts.Diagnostics.Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
+                                    ts.Diagnostics.Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
+                                ts.Diagnostics.Return_type_of_public_method_from_exported_class_has_or_is_using_private_name_0;
+                        }
+                        else {
+                            // Interfaces cannot have return types that cannot be named
+                            diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                                ts.Diagnostics.Return_type_of_method_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
+                                ts.Diagnostics.Return_type_of_method_from_exported_interface_has_or_is_using_private_name_0;
+                        }
+                        break;
+                    case 228 /* FunctionDeclaration */:
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                                ts.Diagnostics.Return_type_of_exported_function_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
+                                ts.Diagnostics.Return_type_of_exported_function_has_or_is_using_name_0_from_private_module_1 :
+                            ts.Diagnostics.Return_type_of_exported_function_has_or_is_using_private_name_0;
+                        break;
+                    default:
+                        ts.Debug.fail("This is unknown kind for signature: " + node.kind);
                 }
+                return {
+                    diagnosticMessage: diagnosticMessage,
+                    errorNode: node.name || node
+                };
             }
         }
-        function hasParseDiagnostics(sourceFile) {
-            return sourceFile.parseDiagnostics.length > 0;
-        }
-        function grammarErrorOnFirstToken(node, message, arg0, arg1, arg2) {
-            var sourceFile = ts.getSourceFileOfNode(node);
-            if (!hasParseDiagnostics(sourceFile)) {
-                var span_4 = ts.getSpanOfTokenAtPosition(sourceFile, node.pos);
-                diagnostics.add(ts.createFileDiagnostic(sourceFile, span_4.start, span_4.length, message, arg0, arg1, arg2));
-                return true;
+        function emitParameterDeclaration(node) {
+            increaseIndent();
+            emitJsDocComments(node);
+            if (node.dotDotDotToken) {
+                write("...");
             }
-        }
-        function grammarErrorAtPos(sourceFile, start, length, message, arg0, arg1, arg2) {
-            if (!hasParseDiagnostics(sourceFile)) {
-                diagnostics.add(ts.createFileDiagnostic(sourceFile, start, length, message, arg0, arg1, arg2));
-                return true;
+            if (ts.isBindingPattern(node.name)) {
+                // For bindingPattern, we can't simply writeTextOfNode from the source file
+                // because we want to omit the initializer and using writeTextOfNode will result in initializer get emitted.
+                // Therefore, we will have to recursively emit each element in the bindingPattern.
+                emitBindingPattern(node.name);
             }
-        }
-        function grammarErrorOnNode(node, message, arg0, arg1, arg2) {
-            var sourceFile = ts.getSourceFileOfNode(node);
-            if (!hasParseDiagnostics(sourceFile)) {
-                diagnostics.add(ts.createDiagnosticForNode(node, message, arg0, arg1, arg2));
-                return true;
+            else {
+                writeTextOfNode(currentText, node.name);
             }
-        }
-        function checkGrammarConstructorTypeParameters(node) {
-            if (node.typeParameters) {
-                return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.typeParameters.pos, node.typeParameters.end - node.typeParameters.pos, ts.Diagnostics.Type_parameters_cannot_appear_on_a_constructor_declaration);
+            if (resolver.isOptionalParameter(node)) {
+                write("?");
             }
-        }
-        function checkGrammarConstructorTypeAnnotation(node) {
-            if (node.type) {
-                return grammarErrorOnNode(node.type, ts.Diagnostics.Type_annotation_cannot_appear_on_a_constructor_declaration);
+            decreaseIndent();
+            if (node.parent.kind === 160 /* FunctionType */ ||
+                node.parent.kind === 161 /* ConstructorType */ ||
+                node.parent.parent.kind === 163 /* TypeLiteral */) {
+                emitTypeOfVariableDeclarationFromTypeLiteral(node);
             }
-        }
-        function checkGrammarProperty(node) {
-            if (ts.isClassLike(node.parent)) {
-                if (checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_class_property_declaration_must_directly_refer_to_a_built_in_symbol)) {
-                    return true;
-                }
+            else if (!ts.hasModifier(node.parent, 8 /* Private */)) {
+                writeTypeOfDeclaration(node, node.type, getParameterDeclarationTypeVisibilityError);
             }
-            else if (node.parent.kind === 222 /* InterfaceDeclaration */) {
-                if (checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol)) {
-                    return true;
-                }
-                if (node.initializer) {
-                    return grammarErrorOnNode(node.initializer, ts.Diagnostics.An_interface_property_cannot_have_an_initializer);
+            function getParameterDeclarationTypeVisibilityError(symbolAccessibilityResult) {
+                var diagnosticMessage = getParameterDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult);
+                return diagnosticMessage !== undefined ? {
+                    diagnosticMessage: diagnosticMessage,
+                    errorNode: node,
+                    typeName: node.name
+                } : undefined;
+            }
+            function getParameterDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult) {
+                switch (node.parent.kind) {
+                    case 152 /* Constructor */:
+                        return symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                                ts.Diagnostics.Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                                ts.Diagnostics.Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Parameter_0_of_constructor_from_exported_class_has_or_is_using_private_name_1;
+                    case 156 /* ConstructSignature */:
+                        // Interfaces cannot have parameter types that cannot be named
+                        return symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1;
+                    case 155 /* CallSignature */:
+                        // Interfaces cannot have parameter types that cannot be named
+                        return symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1;
+                    case 157 /* IndexSignature */:
+                        // Interfaces cannot have parameter types that cannot be named
+                        return symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Parameter_0_of_index_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Parameter_0_of_index_signature_from_exported_interface_has_or_is_using_private_name_1;
+                    case 151 /* MethodDeclaration */:
+                    case 150 /* MethodSignature */:
+                        if (ts.hasModifier(node.parent, 32 /* Static */)) {
+                            return symbolAccessibilityResult.errorModuleName ?
+                                symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                                    ts.Diagnostics.Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                                    ts.Diagnostics.Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                                ts.Diagnostics.Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1;
+                        }
+                        else if (node.parent.parent.kind === 229 /* ClassDeclaration */) {
+                            return symbolAccessibilityResult.errorModuleName ?
+                                symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                                    ts.Diagnostics.Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                                    ts.Diagnostics.Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                                ts.Diagnostics.Parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1;
+                        }
+                        else {
+                            // Interfaces cannot have parameter types that cannot be named
+                            return symbolAccessibilityResult.errorModuleName ?
+                                ts.Diagnostics.Parameter_0_of_method_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
+                                ts.Diagnostics.Parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1;
+                        }
+                    case 228 /* FunctionDeclaration */:
+                        return symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                                ts.Diagnostics.Parameter_0_of_exported_function_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                                ts.Diagnostics.Parameter_0_of_exported_function_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Parameter_0_of_exported_function_has_or_is_using_private_name_1;
+                    default:
+                        ts.Debug.fail("This is unknown parent for parameter: " + node.parent.kind);
                 }
             }
-            else if (node.parent.kind === 159 /* TypeLiteral */) {
-                if (checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol)) {
-                    return true;
-                }
-                if (node.initializer) {
-                    return grammarErrorOnNode(node.initializer, ts.Diagnostics.A_type_literal_property_cannot_have_an_initializer);
+            function emitBindingPattern(bindingPattern) {
+                // We have to explicitly emit square bracket and bracket because these tokens are not store inside the node.
+                if (bindingPattern.kind === 174 /* ObjectBindingPattern */) {
+                    write("{");
+                    emitCommaList(bindingPattern.elements, emitBindingElement);
+                    write("}");
                 }
-            }
-            if (ts.isInAmbientContext(node) && node.initializer) {
-                return grammarErrorOnFirstToken(node.initializer, ts.Diagnostics.Initializers_are_not_allowed_in_ambient_contexts);
-            }
-        }
-        function checkGrammarTopLevelElementForRequiredDeclareModifier(node) {
-            // A declare modifier is required for any top level .d.ts declaration except export=, export default, export as namespace
-            // interfaces and imports categories:
-            //
-            //  DeclarationElement:
-            //     ExportAssignment
-            //     export_opt   InterfaceDeclaration
-            //     export_opt   TypeAliasDeclaration
-            //     export_opt   ImportDeclaration
-            //     export_opt   ExternalImportDeclaration
-            //     export_opt   AmbientDeclaration
-            //
-            // TODO: The spec needs to be amended to reflect this grammar.
-            if (node.kind === 222 /* InterfaceDeclaration */ ||
-                node.kind === 223 /* TypeAliasDeclaration */ ||
-                node.kind === 230 /* ImportDeclaration */ ||
-                node.kind === 229 /* ImportEqualsDeclaration */ ||
-                node.kind === 236 /* ExportDeclaration */ ||
-                node.kind === 235 /* ExportAssignment */ ||
-                node.kind === 228 /* NamespaceExportDeclaration */ ||
-                ts.getModifierFlags(node) & (2 /* Ambient */ | 1 /* Export */ | 512 /* Default */)) {
-                return false;
-            }
-            return grammarErrorOnFirstToken(node, ts.Diagnostics.A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file);
-        }
-        function checkGrammarTopLevelElementsForRequiredDeclareModifier(file) {
-            for (var _i = 0, _a = file.statements; _i < _a.length; _i++) {
-                var decl = _a[_i];
-                if (ts.isDeclaration(decl) || decl.kind === 200 /* VariableStatement */) {
-                    if (checkGrammarTopLevelElementForRequiredDeclareModifier(decl)) {
-                        return true;
+                else if (bindingPattern.kind === 175 /* ArrayBindingPattern */) {
+                    write("[");
+                    var elements = bindingPattern.elements;
+                    emitCommaList(elements, emitBindingElement);
+                    if (elements && elements.hasTrailingComma) {
+                        write(", ");
                     }
+                    write("]");
                 }
             }
-        }
-        function checkGrammarSourceFile(node) {
-            return ts.isInAmbientContext(node) && checkGrammarTopLevelElementsForRequiredDeclareModifier(node);
-        }
-        function checkGrammarStatementInAmbientContext(node) {
-            if (ts.isInAmbientContext(node)) {
-                // An accessors is already reported about the ambient context
-                if (isAccessor(node.parent.kind)) {
-                    return getNodeLinks(node).hasReportedStatementInAmbientContext = true;
-                }
-                // Find containing block which is either Block, ModuleBlock, SourceFile
-                var links = getNodeLinks(node);
-                if (!links.hasReportedStatementInAmbientContext && ts.isFunctionLike(node.parent)) {
-                    return getNodeLinks(node).hasReportedStatementInAmbientContext = grammarErrorOnFirstToken(node, ts.Diagnostics.An_implementation_cannot_be_declared_in_ambient_contexts);
+            function emitBindingElement(bindingElement) {
+                if (bindingElement.kind === 200 /* OmittedExpression */) {
+                    // If bindingElement is an omittedExpression (i.e. containing elision),
+                    // we will emit blank space (although this may differ from users' original code,
+                    // it allows emitSeparatedList to write separator appropriately)
+                    // Example:
+                    //      original: function foo([, x, ,]) {}
+                    //      emit    : function foo([ , x,  , ]) {}
+                    write(" ");
                 }
-                // We are either parented by another statement, or some sort of block.
-                // If we're in a block, we only want to really report an error once
-                // to prevent noisiness.  So use a bit on the block to indicate if
-                // this has already been reported, and don't report if it has.
-                //
-                if (node.parent.kind === 199 /* Block */ || node.parent.kind === 226 /* ModuleBlock */ || node.parent.kind === 256 /* SourceFile */) {
-                    var links_1 = getNodeLinks(node.parent);
-                    // Check if the containing block ever report this error
-                    if (!links_1.hasReportedStatementInAmbientContext) {
-                        return links_1.hasReportedStatementInAmbientContext = grammarErrorOnFirstToken(node, ts.Diagnostics.Statements_are_not_allowed_in_ambient_contexts);
+                else if (bindingElement.kind === 176 /* BindingElement */) {
+                    if (bindingElement.propertyName) {
+                        // bindingElement has propertyName property in the following case:
+                        //      { y: [a,b,c] ...} -> bindingPattern will have a property called propertyName for "y"
+                        // We have to explicitly emit the propertyName before descending into its binding elements.
+                        // Example:
+                        //      original: function foo({y: [a,b,c]}) {}
+                        //      emit    : declare function foo({y: [a, b, c]}: { y: [any, any, any] }) void;
+                        writeTextOfNode(currentText, bindingElement.propertyName);
+                        write(": ");
+                    }
+                    if (bindingElement.name) {
+                        if (ts.isBindingPattern(bindingElement.name)) {
+                            // If it is a nested binding pattern, we will recursively descend into each element and emit each one separately.
+                            // In the case of rest element, we will omit rest element.
+                            // Example:
+                            //      original: function foo([a, [[b]], c] = [1,[["string"]], 3]) {}
+                            //      emit    : declare function foo([a, [[b]], c]: [number, [[string]], number]): void;
+                            //      original with rest: function foo([a, ...c]) {}
+                            //      emit              : declare function foo([a, ...c]): void;
+                            emitBindingPattern(bindingElement.name);
+                        }
+                        else {
+                            ts.Debug.assert(bindingElement.name.kind === 71 /* Identifier */);
+                            // If the node is just an identifier, we will simply emit the text associated with the node's name
+                            // Example:
+                            //      original: function foo({y = 10, x}) {}
+                            //      emit    : declare function foo({y, x}: {number, any}): void;
+                            if (bindingElement.dotDotDotToken) {
+                                write("...");
+                            }
+                            writeTextOfNode(currentText, bindingElement.name);
+                        }
                     }
-                }
-                else {
-                }
-            }
-        }
-        function checkGrammarNumericLiteral(node) {
-            // Grammar checking
-            if (node.isOctalLiteral && languageVersion >= 1 /* ES5 */) {
-                return grammarErrorOnNode(node, ts.Diagnostics.Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher);
-            }
-        }
-        function grammarErrorAfterFirstToken(node, message, arg0, arg1, arg2) {
-            var sourceFile = ts.getSourceFileOfNode(node);
-            if (!hasParseDiagnostics(sourceFile)) {
-                var span_5 = ts.getSpanOfTokenAtPosition(sourceFile, node.pos);
-                diagnostics.add(ts.createFileDiagnostic(sourceFile, ts.textSpanEnd(span_5), /*length*/ 0, message, arg0, arg1, arg2));
-                return true;
-            }
-        }
-        function getAmbientModules() {
-            var result = [];
-            for (var sym in globals) {
-                if (ambientModuleSymbolRegex.test(sym)) {
-                    result.push(globals[sym]);
                 }
             }
-            return result;
         }
-    }
-    ts.createTypeChecker = createTypeChecker;
-})(ts || (ts = {}));
-/// <reference path="sys.ts"/>
-/// <reference path="types.ts"/>
-/// <reference path="core.ts"/>
-/// <reference path="diagnosticInformationMap.generated.ts"/>
-/// <reference path="scanner.ts"/>
-var ts;
-(function (ts) {
-    /* @internal */
-    ts.compileOnSaveCommandLineOption = { name: "compileOnSave", type: "boolean" };
-    /* @internal */
-    ts.optionDeclarations = [
-        {
-            name: "charset",
-            type: "string",
-        },
-        ts.compileOnSaveCommandLineOption,
-        {
-            name: "declaration",
-            shortName: "d",
-            type: "boolean",
-            description: ts.Diagnostics.Generates_corresponding_d_ts_file,
-        },
-        {
-            name: "declarationDir",
-            type: "string",
-            isFilePath: true,
-            paramType: ts.Diagnostics.DIRECTORY,
-        },
-        {
-            name: "diagnostics",
-            type: "boolean",
-        },
-        {
-            name: "extendedDiagnostics",
-            type: "boolean",
-            experimental: true
-        },
-        {
-            name: "emitBOM",
-            type: "boolean"
-        },
-        {
-            name: "help",
-            shortName: "h",
-            type: "boolean",
-            description: ts.Diagnostics.Print_this_message,
-        },
-        {
-            name: "help",
-            shortName: "?",
-            type: "boolean"
-        },
-        {
-            name: "init",
-            type: "boolean",
-            description: ts.Diagnostics.Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file,
-        },
-        {
-            name: "inlineSourceMap",
-            type: "boolean",
-        },
-        {
-            name: "inlineSources",
-            type: "boolean",
-        },
-        {
-            name: "jsx",
-            type: ts.createMap({
-                "preserve": 1 /* Preserve */,
-                "react": 2 /* React */
-            }),
-            paramType: ts.Diagnostics.KIND,
-            description: ts.Diagnostics.Specify_JSX_code_generation_Colon_preserve_or_react,
-        },
-        {
-            name: "reactNamespace",
-            type: "string",
-            description: ts.Diagnostics.Specify_the_object_invoked_for_createElement_and_spread_when_targeting_react_JSX_emit
-        },
-        {
-            name: "listFiles",
-            type: "boolean",
-        },
-        {
-            name: "locale",
-            type: "string",
-        },
-        {
-            name: "mapRoot",
-            type: "string",
-            isFilePath: true,
-            description: ts.Diagnostics.Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations,
-            paramType: ts.Diagnostics.LOCATION,
-        },
-        {
-            name: "module",
-            shortName: "m",
-            type: ts.createMap({
-                "none": ts.ModuleKind.None,
-                "commonjs": ts.ModuleKind.CommonJS,
-                "amd": ts.ModuleKind.AMD,
-                "system": ts.ModuleKind.System,
-                "umd": ts.ModuleKind.UMD,
-                "es6": ts.ModuleKind.ES6,
-                "es2015": ts.ModuleKind.ES2015,
-            }),
-            description: ts.Diagnostics.Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015,
-            paramType: ts.Diagnostics.KIND,
-        },
-        {
-            name: "newLine",
-            type: ts.createMap({
-                "crlf": 0 /* CarriageReturnLineFeed */,
-                "lf": 1 /* LineFeed */
-            }),
-            description: ts.Diagnostics.Specify_the_end_of_line_sequence_to_be_used_when_emitting_files_Colon_CRLF_dos_or_LF_unix,
-            paramType: ts.Diagnostics.NEWLINE,
-        },
-        {
-            name: "noEmit",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_emit_outputs,
-        },
-        {
-            name: "noEmitHelpers",
-            type: "boolean"
-        },
-        {
-            name: "noEmitOnError",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_emit_outputs_if_any_errors_were_reported,
-        },
-        {
-            name: "noErrorTruncation",
-            type: "boolean"
-        },
-        {
-            name: "noImplicitAny",
-            type: "boolean",
-            description: ts.Diagnostics.Raise_error_on_expressions_and_declarations_with_an_implied_any_type,
-        },
-        {
-            name: "noImplicitThis",
-            type: "boolean",
-            description: ts.Diagnostics.Raise_error_on_this_expressions_with_an_implied_any_type,
-        },
-        {
-            name: "noUnusedLocals",
-            type: "boolean",
-            description: ts.Diagnostics.Report_errors_on_unused_locals,
-        },
-        {
-            name: "noUnusedParameters",
-            type: "boolean",
-            description: ts.Diagnostics.Report_errors_on_unused_parameters,
-        },
-        {
-            name: "noLib",
-            type: "boolean",
-        },
-        {
-            name: "noResolve",
-            type: "boolean",
-        },
-        {
-            name: "skipDefaultLibCheck",
-            type: "boolean",
-        },
-        {
-            name: "skipLibCheck",
-            type: "boolean",
-            description: ts.Diagnostics.Skip_type_checking_of_declaration_files,
-        },
-        {
-            name: "out",
-            type: "string",
-            isFilePath: false,
-            // for correct behaviour, please use outFile
-            paramType: ts.Diagnostics.FILE,
-        },
-        {
-            name: "outFile",
-            type: "string",
-            isFilePath: true,
-            description: ts.Diagnostics.Concatenate_and_emit_output_to_single_file,
-            paramType: ts.Diagnostics.FILE,
-        },
-        {
-            name: "outDir",
-            type: "string",
-            isFilePath: true,
-            description: ts.Diagnostics.Redirect_output_structure_to_the_directory,
-            paramType: ts.Diagnostics.DIRECTORY,
-        },
-        {
-            name: "preserveConstEnums",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_erase_const_enum_declarations_in_generated_code
-        },
-        {
-            name: "pretty",
-            description: ts.Diagnostics.Stylize_errors_and_messages_using_color_and_context_experimental,
-            type: "boolean"
-        },
-        {
-            name: "project",
-            shortName: "p",
-            type: "string",
-            isFilePath: true,
-            description: ts.Diagnostics.Compile_the_project_in_the_given_directory,
-            paramType: ts.Diagnostics.DIRECTORY
-        },
-        {
-            name: "removeComments",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_emit_comments_to_output,
-        },
-        {
-            name: "rootDir",
-            type: "string",
-            isFilePath: true,
-            paramType: ts.Diagnostics.LOCATION,
-            description: ts.Diagnostics.Specify_the_root_directory_of_input_files_Use_to_control_the_output_directory_structure_with_outDir,
-        },
-        {
-            name: "isolatedModules",
-            type: "boolean",
-        },
-        {
-            name: "sourceMap",
-            type: "boolean",
-            description: ts.Diagnostics.Generates_corresponding_map_file,
-        },
-        {
-            name: "sourceRoot",
-            type: "string",
-            isFilePath: true,
-            description: ts.Diagnostics.Specify_the_location_where_debugger_should_locate_TypeScript_files_instead_of_source_locations,
-            paramType: ts.Diagnostics.LOCATION,
-        },
-        {
-            name: "suppressExcessPropertyErrors",
-            type: "boolean",
-            description: ts.Diagnostics.Suppress_excess_property_checks_for_object_literals,
-            experimental: true
-        },
-        {
-            name: "suppressImplicitAnyIndexErrors",
-            type: "boolean",
-            description: ts.Diagnostics.Suppress_noImplicitAny_errors_for_indexing_objects_lacking_index_signatures,
-        },
-        {
-            name: "stripInternal",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_emit_declarations_for_code_that_has_an_internal_annotation,
-            experimental: true
-        },
-        {
-            name: "target",
-            shortName: "t",
-            type: ts.createMap({
-                "es3": 0 /* ES3 */,
-                "es5": 1 /* ES5 */,
-                "es6": 2 /* ES6 */,
-                "es2015": 2 /* ES2015 */,
-            }),
-            description: ts.Diagnostics.Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015,
-            paramType: ts.Diagnostics.VERSION,
-        },
-        {
-            name: "version",
-            shortName: "v",
-            type: "boolean",
-            description: ts.Diagnostics.Print_the_compiler_s_version,
-        },
-        {
-            name: "watch",
-            shortName: "w",
-            type: "boolean",
-            description: ts.Diagnostics.Watch_input_files,
-        },
-        {
-            name: "experimentalDecorators",
-            type: "boolean",
-            description: ts.Diagnostics.Enables_experimental_support_for_ES7_decorators
-        },
-        {
-            name: "emitDecoratorMetadata",
-            type: "boolean",
-            experimental: true,
-            description: ts.Diagnostics.Enables_experimental_support_for_emitting_type_metadata_for_decorators
-        },
-        {
-            name: "moduleResolution",
-            type: ts.createMap({
-                "node": ts.ModuleResolutionKind.NodeJs,
-                "classic": ts.ModuleResolutionKind.Classic,
-            }),
-            description: ts.Diagnostics.Specify_module_resolution_strategy_Colon_node_Node_js_or_classic_TypeScript_pre_1_6,
-            paramType: ts.Diagnostics.STRATEGY,
-        },
-        {
-            name: "allowUnusedLabels",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_report_errors_on_unused_labels
-        },
-        {
-            name: "noImplicitReturns",
-            type: "boolean",
-            description: ts.Diagnostics.Report_error_when_not_all_code_paths_in_function_return_a_value
-        },
-        {
-            name: "noFallthroughCasesInSwitch",
-            type: "boolean",
-            description: ts.Diagnostics.Report_errors_for_fallthrough_cases_in_switch_statement
-        },
-        {
-            name: "allowUnreachableCode",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_report_errors_on_unreachable_code
-        },
-        {
-            name: "forceConsistentCasingInFileNames",
-            type: "boolean",
-            description: ts.Diagnostics.Disallow_inconsistently_cased_references_to_the_same_file
-        },
-        {
-            name: "baseUrl",
-            type: "string",
-            isFilePath: true,
-            description: ts.Diagnostics.Base_directory_to_resolve_non_absolute_module_names
-        },
-        {
-            // this option can only be specified in tsconfig.json
-            // use type = object to copy the value as-is
-            name: "paths",
-            type: "object",
-            isTSConfigOnly: true
-        },
-        {
-            // this option can only be specified in tsconfig.json
-            // use type = object to copy the value as-is
-            name: "rootDirs",
-            type: "list",
-            isTSConfigOnly: true,
-            element: {
-                name: "rootDirs",
-                type: "string",
-                isFilePath: true
-            }
-        },
-        {
-            name: "typeRoots",
-            type: "list",
-            element: {
-                name: "typeRoots",
-                type: "string",
-                isFilePath: true
+        function emitNode(node) {
+            switch (node.kind) {
+                case 228 /* FunctionDeclaration */:
+                case 233 /* ModuleDeclaration */:
+                case 237 /* ImportEqualsDeclaration */:
+                case 230 /* InterfaceDeclaration */:
+                case 229 /* ClassDeclaration */:
+                case 231 /* TypeAliasDeclaration */:
+                case 232 /* EnumDeclaration */:
+                    return emitModuleElement(node, isModuleElementVisible(node));
+                case 208 /* VariableStatement */:
+                    return emitModuleElement(node, isVariableStatementVisible(node));
+                case 238 /* ImportDeclaration */:
+                    // Import declaration without import clause is visible, otherwise it is not visible
+                    return emitModuleElement(node, /*isModuleElementVisible*/ !node.importClause);
+                case 244 /* ExportDeclaration */:
+                    return emitExportDeclaration(node);
+                case 152 /* Constructor */:
+                case 151 /* MethodDeclaration */:
+                case 150 /* MethodSignature */:
+                    return writeFunctionDeclaration(node);
+                case 156 /* ConstructSignature */:
+                case 155 /* CallSignature */:
+                case 157 /* IndexSignature */:
+                    return emitSignatureDeclarationWithJsDocComments(node);
+                case 153 /* GetAccessor */:
+                case 154 /* SetAccessor */:
+                    return emitAccessorDeclaration(node);
+                case 149 /* PropertyDeclaration */:
+                case 148 /* PropertySignature */:
+                    return emitPropertyDeclaration(node);
+                case 264 /* EnumMember */:
+                    return emitEnumMemberDeclaration(node);
+                case 243 /* ExportAssignment */:
+                    return emitExportAssignment(node);
+                case 265 /* SourceFile */:
+                    return emitSourceFile(node);
             }
-        },
-        {
-            name: "types",
-            type: "list",
-            element: {
-                name: "types",
-                type: "string"
-            },
-            description: ts.Diagnostics.Type_declaration_files_to_be_included_in_compilation
-        },
-        {
-            name: "traceResolution",
-            type: "boolean",
-            description: ts.Diagnostics.Enable_tracing_of_the_name_resolution_process
-        },
-        {
-            name: "allowJs",
-            type: "boolean",
-            description: ts.Diagnostics.Allow_javascript_files_to_be_compiled
-        },
-        {
-            name: "allowSyntheticDefaultImports",
-            type: "boolean",
-            description: ts.Diagnostics.Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typechecking
-        },
-        {
-            name: "noImplicitUseStrict",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_emit_use_strict_directives_in_module_output
-        },
-        {
-            name: "maxNodeModuleJsDepth",
-            type: "number",
-            description: ts.Diagnostics.The_maximum_dependency_depth_to_search_under_node_modules_and_load_JavaScript_files
-        },
-        {
-            name: "listEmittedFiles",
-            type: "boolean"
-        },
-        {
-            name: "lib",
-            type: "list",
-            element: {
-                name: "lib",
-                type: ts.createMap({
-                    // JavaScript only
-                    "es5": "lib.es5.d.ts",
-                    "es6": "lib.es2015.d.ts",
-                    "es2015": "lib.es2015.d.ts",
-                    "es7": "lib.es2016.d.ts",
-                    "es2016": "lib.es2016.d.ts",
-                    "es2017": "lib.es2017.d.ts",
-                    // Host only
-                    "dom": "lib.dom.d.ts",
-                    "dom.iterable": "lib.dom.iterable.d.ts",
-                    "webworker": "lib.webworker.d.ts",
-                    "scripthost": "lib.scripthost.d.ts",
-                    // ES2015 Or ESNext By-feature options
-                    "es2015.core": "lib.es2015.core.d.ts",
-                    "es2015.collection": "lib.es2015.collection.d.ts",
-                    "es2015.generator": "lib.es2015.generator.d.ts",
-                    "es2015.iterable": "lib.es2015.iterable.d.ts",
-                    "es2015.promise": "lib.es2015.promise.d.ts",
-                    "es2015.proxy": "lib.es2015.proxy.d.ts",
-                    "es2015.reflect": "lib.es2015.reflect.d.ts",
-                    "es2015.symbol": "lib.es2015.symbol.d.ts",
-                    "es2015.symbol.wellknown": "lib.es2015.symbol.wellknown.d.ts",
-                    "es2016.array.include": "lib.es2016.array.include.d.ts",
-                    "es2017.object": "lib.es2017.object.d.ts",
-                    "es2017.sharedmemory": "lib.es2017.sharedmemory.d.ts"
-                }),
-            },
-            description: ts.Diagnostics.Specify_library_files_to_be_included_in_the_compilation_Colon
-        },
-        {
-            name: "disableSizeLimit",
-            type: "boolean"
-        },
-        {
-            name: "strictNullChecks",
-            type: "boolean",
-            description: ts.Diagnostics.Enable_strict_null_checks
-        },
-        {
-            name: "importHelpers",
-            type: "boolean",
-            description: ts.Diagnostics.Import_emit_helpers_from_tslib
         }
-    ];
-    /* @internal */
-    ts.typingOptionDeclarations = [
-        {
-            name: "enableAutoDiscovery",
-            type: "boolean",
-        },
-        {
-            name: "include",
-            type: "list",
-            element: {
-                name: "include",
-                type: "string"
+        /**
+         * Adds the reference to referenced file, returns true if global file reference was emitted
+         * @param referencedFile
+         * @param addBundledFileReference Determines if global file reference corresponding to bundled file should be emitted or not
+         */
+        function writeReferencePath(referencedFile, addBundledFileReference, emitOnlyDtsFiles) {
+            var declFileName;
+            var addedBundledEmitReference = false;
+            if (referencedFile.isDeclarationFile) {
+                // Declaration file, use declaration file name
+                declFileName = referencedFile.fileName;
             }
-        },
-        {
-            name: "exclude",
-            type: "list",
-            element: {
-                name: "exclude",
-                type: "string"
+            else {
+                // Get the declaration file path
+                ts.forEachEmittedFile(host, getDeclFileName, referencedFile, emitOnlyDtsFiles);
+            }
+            if (declFileName) {
+                declFileName = ts.getRelativePathToDirectoryOrUrl(ts.getDirectoryPath(ts.normalizeSlashes(declarationFilePath)), declFileName, host.getCurrentDirectory(), host.getCanonicalFileName, 
+                /*isAbsolutePathAnUrl*/ false);
+                referencesOutput += "/// <reference path=\"" + declFileName + "\" />" + newLine;
+            }
+            return addedBundledEmitReference;
+            function getDeclFileName(emitFileNames, sourceFileOrBundle) {
+                // Dont add reference path to this file if it is a bundled emit and caller asked not emit bundled file path
+                var isBundledEmit = sourceFileOrBundle.kind === 266 /* Bundle */;
+                if (isBundledEmit && !addBundledFileReference) {
+                    return;
+                }
+                ts.Debug.assert(!!emitFileNames.declarationFilePath || ts.isSourceFileJavaScript(referencedFile), "Declaration file is not present only for javascript files");
+                declFileName = emitFileNames.declarationFilePath || emitFileNames.jsFilePath;
+                addedBundledEmitReference = isBundledEmit;
             }
         }
-    ];
+    }
     /* @internal */
-    ts.defaultInitCompilerOptions = {
-        module: ts.ModuleKind.CommonJS,
-        target: 1 /* ES5 */,
-        noImplicitAny: false,
-        sourceMap: false,
-    };
-    var optionNameMapCache;
+    function writeDeclarationFile(declarationFilePath, sourceFileOrBundle, host, resolver, emitterDiagnostics, emitOnlyDtsFiles) {
+        var emitDeclarationResult = emitDeclarations(host, resolver, emitterDiagnostics, declarationFilePath, sourceFileOrBundle, emitOnlyDtsFiles);
+        var emitSkipped = emitDeclarationResult.reportedDeclarationError || host.isEmitBlocked(declarationFilePath) || host.getCompilerOptions().noEmit;
+        if (!emitSkipped) {
+            var sourceFiles = sourceFileOrBundle.kind === 266 /* Bundle */ ? sourceFileOrBundle.sourceFiles : [sourceFileOrBundle];
+            var declarationOutput = emitDeclarationResult.referencesOutput
+                + getDeclarationOutput(emitDeclarationResult.synchronousDeclarationOutput, emitDeclarationResult.moduleElementDeclarationEmitInfo);
+            ts.writeFile(host, emitterDiagnostics, declarationFilePath, declarationOutput, host.getCompilerOptions().emitBOM, sourceFiles);
+        }
+        return emitSkipped;
+        function getDeclarationOutput(synchronousDeclarationOutput, moduleElementDeclarationEmitInfo) {
+            var appliedSyncOutputPos = 0;
+            var declarationOutput = "";
+            // apply asynchronous additions to the synchronous output
+            ts.forEach(moduleElementDeclarationEmitInfo, function (aliasEmitInfo) {
+                if (aliasEmitInfo.asynchronousOutput) {
+                    declarationOutput += synchronousDeclarationOutput.substring(appliedSyncOutputPos, aliasEmitInfo.outputPos);
+                    declarationOutput += getDeclarationOutput(aliasEmitInfo.asynchronousOutput, aliasEmitInfo.subModuleElementDeclarationEmitInfo);
+                    appliedSyncOutputPos = aliasEmitInfo.outputPos;
+                }
+            });
+            declarationOutput += synchronousDeclarationOutput.substring(appliedSyncOutputPos);
+            return declarationOutput;
+        }
+    }
+    ts.writeDeclarationFile = writeDeclarationFile;
+})(ts || (ts = {}));
+/// <reference path="core.ts"/>
+/// <reference path="utilities.ts"/>
+var ts;
+(function (ts) {
+    function createSynthesizedNode(kind) {
+        var node = ts.createNode(kind, -1, -1);
+        node.flags |= 8 /* Synthesized */;
+        return node;
+    }
     /* @internal */
-    function getOptionNameMap() {
-        if (optionNameMapCache) {
-            return optionNameMapCache;
+    function updateNode(updated, original) {
+        if (updated !== original) {
+            setOriginalNode(updated, original);
+            setTextRange(updated, original);
+            if (original.startsOnNewLine) {
+                updated.startsOnNewLine = true;
+            }
+            ts.aggregateTransformFlags(updated);
         }
-        var optionNameMap = ts.createMap();
-        var shortOptionNames = ts.createMap();
-        ts.forEach(ts.optionDeclarations, function (option) {
-            optionNameMap[option.name.toLowerCase()] = option;
-            if (option.shortName) {
-                shortOptionNames[option.shortName] = option.name;
+        return updated;
+    }
+    ts.updateNode = updateNode;
+    /**
+     * Make `elements` into a `NodeArray<T>`. If `elements` is `undefined`, returns an empty `NodeArray<T>`.
+     */
+    function createNodeArray(elements, hasTrailingComma) {
+        if (elements) {
+            if (ts.isNodeArray(elements)) {
+                return elements;
             }
-        });
-        optionNameMapCache = { optionNameMap: optionNameMap, shortOptionNames: shortOptionNames };
-        return optionNameMapCache;
+        }
+        else {
+            elements = [];
+        }
+        var array = elements;
+        array.pos = -1;
+        array.end = -1;
+        array.hasTrailingComma = hasTrailingComma;
+        return array;
+    }
+    ts.createNodeArray = createNodeArray;
+    /**
+     * Creates a shallow, memberwise clone of a node with no source map location.
+     */
+    /* @internal */
+    function getSynthesizedClone(node) {
+        // We don't use "clone" from core.ts here, as we need to preserve the prototype chain of
+        // the original node. We also need to exclude specific properties and only include own-
+        // properties (to skip members already defined on the shared prototype).
+        var clone = createSynthesizedNode(node.kind);
+        clone.flags |= node.flags;
+        setOriginalNode(clone, node);
+        for (var key in node) {
+            if (clone.hasOwnProperty(key) || !node.hasOwnProperty(key)) {
+                continue;
+            }
+            clone[key] = node[key];
+        }
+        return clone;
+    }
+    ts.getSynthesizedClone = getSynthesizedClone;
+    function createLiteral(value) {
+        if (typeof value === "number") {
+            return createNumericLiteral(value + "");
+        }
+        if (typeof value === "boolean") {
+            return value ? createTrue() : createFalse();
+        }
+        if (typeof value === "string") {
+            return createStringLiteral(value);
+        }
+        return createLiteralFromNode(value);
+    }
+    ts.createLiteral = createLiteral;
+    function createNumericLiteral(value) {
+        var node = createSynthesizedNode(8 /* NumericLiteral */);
+        node.text = value;
+        node.numericLiteralFlags = 0;
+        return node;
+    }
+    ts.createNumericLiteral = createNumericLiteral;
+    function createStringLiteral(text) {
+        var node = createSynthesizedNode(9 /* StringLiteral */);
+        node.text = text;
+        return node;
+    }
+    function createLiteralFromNode(sourceNode) {
+        var node = createStringLiteral(sourceNode.text);
+        node.textSourceNode = sourceNode;
+        return node;
+    }
+    function createIdentifier(text, typeArguments) {
+        var node = createSynthesizedNode(71 /* Identifier */);
+        node.text = ts.escapeIdentifier(text);
+        node.originalKeywordKind = text ? ts.stringToToken(text) : 0 /* Unknown */;
+        node.autoGenerateKind = 0 /* None */;
+        node.autoGenerateId = 0;
+        if (typeArguments) {
+            node.typeArguments = createNodeArray(typeArguments);
+        }
+        return node;
+    }
+    ts.createIdentifier = createIdentifier;
+    function updateIdentifier(node, typeArguments) {
+        return node.typeArguments !== typeArguments
+            ? updateNode(createIdentifier(node.text, typeArguments), node)
+            : node;
+    }
+    ts.updateIdentifier = updateIdentifier;
+    var nextAutoGenerateId = 0;
+    /** Create a unique temporary variable. */
+    function createTempVariable(recordTempVariable) {
+        var name = createIdentifier("");
+        name.autoGenerateKind = 1 /* Auto */;
+        name.autoGenerateId = nextAutoGenerateId;
+        nextAutoGenerateId++;
+        if (recordTempVariable) {
+            recordTempVariable(name);
+        }
+        return name;
+    }
+    ts.createTempVariable = createTempVariable;
+    /** Create a unique temporary variable for use in a loop. */
+    function createLoopVariable() {
+        var name = createIdentifier("");
+        name.autoGenerateKind = 2 /* Loop */;
+        name.autoGenerateId = nextAutoGenerateId;
+        nextAutoGenerateId++;
+        return name;
+    }
+    ts.createLoopVariable = createLoopVariable;
+    /** Create a unique name based on the supplied text. */
+    function createUniqueName(text) {
+        var name = createIdentifier(text);
+        name.autoGenerateKind = 3 /* Unique */;
+        name.autoGenerateId = nextAutoGenerateId;
+        nextAutoGenerateId++;
+        return name;
+    }
+    ts.createUniqueName = createUniqueName;
+    /** Create a unique name generated for a node. */
+    function getGeneratedNameForNode(node) {
+        var name = createIdentifier("");
+        name.autoGenerateKind = 4 /* Node */;
+        name.autoGenerateId = nextAutoGenerateId;
+        name.original = node;
+        nextAutoGenerateId++;
+        return name;
+    }
+    ts.getGeneratedNameForNode = getGeneratedNameForNode;
+    // Punctuation
+    function createToken(token) {
+        return createSynthesizedNode(token);
+    }
+    ts.createToken = createToken;
+    // Reserved words
+    function createSuper() {
+        return createSynthesizedNode(97 /* SuperKeyword */);
+    }
+    ts.createSuper = createSuper;
+    function createThis() {
+        return createSynthesizedNode(99 /* ThisKeyword */);
+    }
+    ts.createThis = createThis;
+    function createNull() {
+        return createSynthesizedNode(95 /* NullKeyword */);
+    }
+    ts.createNull = createNull;
+    function createTrue() {
+        return createSynthesizedNode(101 /* TrueKeyword */);
+    }
+    ts.createTrue = createTrue;
+    function createFalse() {
+        return createSynthesizedNode(86 /* FalseKeyword */);
+    }
+    ts.createFalse = createFalse;
+    // Names
+    function createQualifiedName(left, right) {
+        var node = createSynthesizedNode(143 /* QualifiedName */);
+        node.left = left;
+        node.right = asName(right);
+        return node;
+    }
+    ts.createQualifiedName = createQualifiedName;
+    function updateQualifiedName(node, left, right) {
+        return node.left !== left
+            || node.right !== right
+            ? updateNode(createQualifiedName(left, right), node)
+            : node;
+    }
+    ts.updateQualifiedName = updateQualifiedName;
+    function createComputedPropertyName(expression) {
+        var node = createSynthesizedNode(144 /* ComputedPropertyName */);
+        node.expression = expression;
+        return node;
+    }
+    ts.createComputedPropertyName = createComputedPropertyName;
+    function updateComputedPropertyName(node, expression) {
+        return node.expression !== expression
+            ? updateNode(createComputedPropertyName(expression), node)
+            : node;
+    }
+    ts.updateComputedPropertyName = updateComputedPropertyName;
+    // Signature elements
+    function createTypeParameterDeclaration(name, constraint, defaultType) {
+        var node = createSynthesizedNode(145 /* TypeParameter */);
+        node.name = asName(name);
+        node.constraint = constraint;
+        node.default = defaultType;
+        return node;
+    }
+    ts.createTypeParameterDeclaration = createTypeParameterDeclaration;
+    function updateTypeParameterDeclaration(node, name, constraint, defaultType) {
+        return node.name !== name
+            || node.constraint !== constraint
+            || node.default !== defaultType
+            ? updateNode(createTypeParameterDeclaration(name, constraint, defaultType), node)
+            : node;
+    }
+    ts.updateTypeParameterDeclaration = updateTypeParameterDeclaration;
+    function createParameter(decorators, modifiers, dotDotDotToken, name, questionToken, type, initializer) {
+        var node = createSynthesizedNode(146 /* Parameter */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.dotDotDotToken = dotDotDotToken;
+        node.name = asName(name);
+        node.questionToken = questionToken;
+        node.type = type;
+        node.initializer = initializer ? ts.parenthesizeExpressionForList(initializer) : undefined;
+        return node;
+    }
+    ts.createParameter = createParameter;
+    function updateParameter(node, decorators, modifiers, dotDotDotToken, name, questionToken, type, initializer) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.dotDotDotToken !== dotDotDotToken
+            || node.name !== name
+            || node.questionToken !== questionToken
+            || node.type !== type
+            || node.initializer !== initializer
+            ? updateNode(createParameter(decorators, modifiers, dotDotDotToken, name, node.questionToken, type, initializer), node)
+            : node;
+    }
+    ts.updateParameter = updateParameter;
+    function createDecorator(expression) {
+        var node = createSynthesizedNode(147 /* Decorator */);
+        node.expression = ts.parenthesizeForAccess(expression);
+        return node;
+    }
+    ts.createDecorator = createDecorator;
+    function updateDecorator(node, expression) {
+        return node.expression !== expression
+            ? updateNode(createDecorator(expression), node)
+            : node;
+    }
+    ts.updateDecorator = updateDecorator;
+    // Type Elements
+    function createPropertySignature(modifiers, name, questionToken, type, initializer) {
+        var node = createSynthesizedNode(148 /* PropertySignature */);
+        node.modifiers = asNodeArray(modifiers);
+        node.name = asName(name);
+        node.questionToken = questionToken;
+        node.type = type;
+        node.initializer = initializer;
+        return node;
+    }
+    ts.createPropertySignature = createPropertySignature;
+    function updatePropertySignature(node, modifiers, name, questionToken, type, initializer) {
+        return node.modifiers !== modifiers
+            || node.name !== name
+            || node.questionToken !== questionToken
+            || node.type !== type
+            || node.initializer !== initializer
+            ? updateNode(createPropertySignature(modifiers, name, questionToken, type, initializer), node)
+            : node;
+    }
+    ts.updatePropertySignature = updatePropertySignature;
+    function createProperty(decorators, modifiers, name, questionToken, type, initializer) {
+        var node = createSynthesizedNode(149 /* PropertyDeclaration */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.name = asName(name);
+        node.questionToken = questionToken;
+        node.type = type;
+        node.initializer = initializer;
+        return node;
+    }
+    ts.createProperty = createProperty;
+    function updateProperty(node, decorators, modifiers, name, type, initializer) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.name !== name
+            || node.type !== type
+            || node.initializer !== initializer
+            ? updateNode(createProperty(decorators, modifiers, name, node.questionToken, type, initializer), node)
+            : node;
+    }
+    ts.updateProperty = updateProperty;
+    function createMethodSignature(typeParameters, parameters, type, name, questionToken) {
+        var node = createSignatureDeclaration(150 /* MethodSignature */, typeParameters, parameters, type);
+        node.name = asName(name);
+        node.questionToken = questionToken;
+        return node;
+    }
+    ts.createMethodSignature = createMethodSignature;
+    function updateMethodSignature(node, typeParameters, parameters, type, name, questionToken) {
+        return node.typeParameters !== typeParameters
+            || node.parameters !== parameters
+            || node.type !== type
+            || node.name !== name
+            || node.questionToken !== questionToken
+            ? updateNode(createMethodSignature(typeParameters, parameters, type, name, questionToken), node)
+            : node;
+    }
+    ts.updateMethodSignature = updateMethodSignature;
+    function createMethod(decorators, modifiers, asteriskToken, name, questionToken, typeParameters, parameters, type, body) {
+        var node = createSynthesizedNode(151 /* MethodDeclaration */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.asteriskToken = asteriskToken;
+        node.name = asName(name);
+        node.questionToken = questionToken;
+        node.typeParameters = asNodeArray(typeParameters);
+        node.parameters = createNodeArray(parameters);
+        node.type = type;
+        node.body = body;
+        return node;
+    }
+    ts.createMethod = createMethod;
+    function updateMethod(node, decorators, modifiers, asteriskToken, name, questionToken, typeParameters, parameters, type, body) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.asteriskToken !== asteriskToken
+            || node.name !== name
+            || node.typeParameters !== typeParameters
+            || node.parameters !== parameters
+            || node.type !== type
+            || node.body !== body
+            ? updateNode(createMethod(decorators, modifiers, asteriskToken, name, questionToken, typeParameters, parameters, type, body), node)
+            : node;
+    }
+    ts.updateMethod = updateMethod;
+    function createConstructor(decorators, modifiers, parameters, body) {
+        var node = createSynthesizedNode(152 /* Constructor */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.typeParameters = undefined;
+        node.parameters = createNodeArray(parameters);
+        node.type = undefined;
+        node.body = body;
+        return node;
+    }
+    ts.createConstructor = createConstructor;
+    function updateConstructor(node, decorators, modifiers, parameters, body) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.parameters !== parameters
+            || node.body !== body
+            ? updateNode(createConstructor(decorators, modifiers, parameters, body), node)
+            : node;
+    }
+    ts.updateConstructor = updateConstructor;
+    function createGetAccessor(decorators, modifiers, name, parameters, type, body) {
+        var node = createSynthesizedNode(153 /* GetAccessor */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.name = asName(name);
+        node.typeParameters = undefined;
+        node.parameters = createNodeArray(parameters);
+        node.type = type;
+        node.body = body;
+        return node;
+    }
+    ts.createGetAccessor = createGetAccessor;
+    function updateGetAccessor(node, decorators, modifiers, name, parameters, type, body) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.name !== name
+            || node.parameters !== parameters
+            || node.type !== type
+            || node.body !== body
+            ? updateNode(createGetAccessor(decorators, modifiers, name, parameters, type, body), node)
+            : node;
+    }
+    ts.updateGetAccessor = updateGetAccessor;
+    function createSetAccessor(decorators, modifiers, name, parameters, body) {
+        var node = createSynthesizedNode(154 /* SetAccessor */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.name = asName(name);
+        node.typeParameters = undefined;
+        node.parameters = createNodeArray(parameters);
+        node.body = body;
+        return node;
+    }
+    ts.createSetAccessor = createSetAccessor;
+    function updateSetAccessor(node, decorators, modifiers, name, parameters, body) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.name !== name
+            || node.parameters !== parameters
+            || node.body !== body
+            ? updateNode(createSetAccessor(decorators, modifiers, name, parameters, body), node)
+            : node;
+    }
+    ts.updateSetAccessor = updateSetAccessor;
+    function createCallSignature(typeParameters, parameters, type) {
+        return createSignatureDeclaration(155 /* CallSignature */, typeParameters, parameters, type);
+    }
+    ts.createCallSignature = createCallSignature;
+    function updateCallSignature(node, typeParameters, parameters, type) {
+        return updateSignatureDeclaration(node, typeParameters, parameters, type);
+    }
+    ts.updateCallSignature = updateCallSignature;
+    function createConstructSignature(typeParameters, parameters, type) {
+        return createSignatureDeclaration(156 /* ConstructSignature */, typeParameters, parameters, type);
+    }
+    ts.createConstructSignature = createConstructSignature;
+    function updateConstructSignature(node, typeParameters, parameters, type) {
+        return updateSignatureDeclaration(node, typeParameters, parameters, type);
+    }
+    ts.updateConstructSignature = updateConstructSignature;
+    function createIndexSignature(decorators, modifiers, parameters, type) {
+        var node = createSynthesizedNode(157 /* IndexSignature */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.parameters = createNodeArray(parameters);
+        node.type = type;
+        return node;
+    }
+    ts.createIndexSignature = createIndexSignature;
+    function updateIndexSignature(node, decorators, modifiers, parameters, type) {
+        return node.parameters !== parameters
+            || node.type !== type
+            || node.decorators !== decorators
+            || node.modifiers !== modifiers
+            ? updateNode(createIndexSignature(decorators, modifiers, parameters, type), node)
+            : node;
+    }
+    ts.updateIndexSignature = updateIndexSignature;
+    /* @internal */
+    function createSignatureDeclaration(kind, typeParameters, parameters, type) {
+        var node = createSynthesizedNode(kind);
+        node.typeParameters = asNodeArray(typeParameters);
+        node.parameters = asNodeArray(parameters);
+        node.type = type;
+        return node;
+    }
+    ts.createSignatureDeclaration = createSignatureDeclaration;
+    function updateSignatureDeclaration(node, typeParameters, parameters, type) {
+        return node.typeParameters !== typeParameters
+            || node.parameters !== parameters
+            || node.type !== type
+            ? updateNode(createSignatureDeclaration(node.kind, typeParameters, parameters, type), node)
+            : node;
+    }
+    // Types
+    function createKeywordTypeNode(kind) {
+        return createSynthesizedNode(kind);
+    }
+    ts.createKeywordTypeNode = createKeywordTypeNode;
+    function createTypePredicateNode(parameterName, type) {
+        var node = createSynthesizedNode(158 /* TypePredicate */);
+        node.parameterName = asName(parameterName);
+        node.type = type;
+        return node;
+    }
+    ts.createTypePredicateNode = createTypePredicateNode;
+    function updateTypePredicateNode(node, parameterName, type) {
+        return node.parameterName !== parameterName
+            || node.type !== type
+            ? updateNode(createTypePredicateNode(parameterName, type), node)
+            : node;
+    }
+    ts.updateTypePredicateNode = updateTypePredicateNode;
+    function createTypeReferenceNode(typeName, typeArguments) {
+        var node = createSynthesizedNode(159 /* TypeReference */);
+        node.typeName = asName(typeName);
+        node.typeArguments = typeArguments && ts.parenthesizeTypeParameters(typeArguments);
+        return node;
+    }
+    ts.createTypeReferenceNode = createTypeReferenceNode;
+    function updateTypeReferenceNode(node, typeName, typeArguments) {
+        return node.typeName !== typeName
+            || node.typeArguments !== typeArguments
+            ? updateNode(createTypeReferenceNode(typeName, typeArguments), node)
+            : node;
+    }
+    ts.updateTypeReferenceNode = updateTypeReferenceNode;
+    function createFunctionTypeNode(typeParameters, parameters, type) {
+        return createSignatureDeclaration(160 /* FunctionType */, typeParameters, parameters, type);
+    }
+    ts.createFunctionTypeNode = createFunctionTypeNode;
+    function updateFunctionTypeNode(node, typeParameters, parameters, type) {
+        return updateSignatureDeclaration(node, typeParameters, parameters, type);
+    }
+    ts.updateFunctionTypeNode = updateFunctionTypeNode;
+    function createConstructorTypeNode(typeParameters, parameters, type) {
+        return createSignatureDeclaration(161 /* ConstructorType */, typeParameters, parameters, type);
+    }
+    ts.createConstructorTypeNode = createConstructorTypeNode;
+    function updateConstructorTypeNode(node, typeParameters, parameters, type) {
+        return updateSignatureDeclaration(node, typeParameters, parameters, type);
+    }
+    ts.updateConstructorTypeNode = updateConstructorTypeNode;
+    function createTypeQueryNode(exprName) {
+        var node = createSynthesizedNode(162 /* TypeQuery */);
+        node.exprName = exprName;
+        return node;
+    }
+    ts.createTypeQueryNode = createTypeQueryNode;
+    function updateTypeQueryNode(node, exprName) {
+        return node.exprName !== exprName
+            ? updateNode(createTypeQueryNode(exprName), node)
+            : node;
+    }
+    ts.updateTypeQueryNode = updateTypeQueryNode;
+    function createTypeLiteralNode(members) {
+        var node = createSynthesizedNode(163 /* TypeLiteral */);
+        node.members = createNodeArray(members);
+        return node;
+    }
+    ts.createTypeLiteralNode = createTypeLiteralNode;
+    function updateTypeLiteralNode(node, members) {
+        return node.members !== members
+            ? updateNode(createTypeLiteralNode(members), node)
+            : node;
+    }
+    ts.updateTypeLiteralNode = updateTypeLiteralNode;
+    function createArrayTypeNode(elementType) {
+        var node = createSynthesizedNode(164 /* ArrayType */);
+        node.elementType = ts.parenthesizeElementTypeMember(elementType);
+        return node;
+    }
+    ts.createArrayTypeNode = createArrayTypeNode;
+    function updateArrayTypeNode(node, elementType) {
+        return node.elementType !== elementType
+            ? updateNode(createArrayTypeNode(elementType), node)
+            : node;
+    }
+    ts.updateArrayTypeNode = updateArrayTypeNode;
+    function createTupleTypeNode(elementTypes) {
+        var node = createSynthesizedNode(165 /* TupleType */);
+        node.elementTypes = createNodeArray(elementTypes);
+        return node;
+    }
+    ts.createTupleTypeNode = createTupleTypeNode;
+    function updateTypleTypeNode(node, elementTypes) {
+        return node.elementTypes !== elementTypes
+            ? updateNode(createTupleTypeNode(elementTypes), node)
+            : node;
+    }
+    ts.updateTypleTypeNode = updateTypleTypeNode;
+    function createUnionTypeNode(types) {
+        return createUnionOrIntersectionTypeNode(166 /* UnionType */, types);
+    }
+    ts.createUnionTypeNode = createUnionTypeNode;
+    function updateUnionTypeNode(node, types) {
+        return updateUnionOrIntersectionTypeNode(node, types);
+    }
+    ts.updateUnionTypeNode = updateUnionTypeNode;
+    function createIntersectionTypeNode(types) {
+        return createUnionOrIntersectionTypeNode(167 /* IntersectionType */, types);
+    }
+    ts.createIntersectionTypeNode = createIntersectionTypeNode;
+    function updateIntersectionTypeNode(node, types) {
+        return updateUnionOrIntersectionTypeNode(node, types);
+    }
+    ts.updateIntersectionTypeNode = updateIntersectionTypeNode;
+    function createUnionOrIntersectionTypeNode(kind, types) {
+        var node = createSynthesizedNode(kind);
+        node.types = ts.parenthesizeElementTypeMembers(types);
+        return node;
+    }
+    ts.createUnionOrIntersectionTypeNode = createUnionOrIntersectionTypeNode;
+    function updateUnionOrIntersectionTypeNode(node, types) {
+        return node.types !== types
+            ? updateNode(createUnionOrIntersectionTypeNode(node.kind, types), node)
+            : node;
+    }
+    function createParenthesizedType(type) {
+        var node = createSynthesizedNode(168 /* ParenthesizedType */);
+        node.type = type;
+        return node;
+    }
+    ts.createParenthesizedType = createParenthesizedType;
+    function updateParenthesizedType(node, type) {
+        return node.type !== type
+            ? updateNode(createParenthesizedType(type), node)
+            : node;
+    }
+    ts.updateParenthesizedType = updateParenthesizedType;
+    function createThisTypeNode() {
+        return createSynthesizedNode(169 /* ThisType */);
+    }
+    ts.createThisTypeNode = createThisTypeNode;
+    function createTypeOperatorNode(type) {
+        var node = createSynthesizedNode(170 /* TypeOperator */);
+        node.operator = 127 /* KeyOfKeyword */;
+        node.type = ts.parenthesizeElementTypeMember(type);
+        return node;
+    }
+    ts.createTypeOperatorNode = createTypeOperatorNode;
+    function updateTypeOperatorNode(node, type) {
+        return node.type !== type ? updateNode(createTypeOperatorNode(type), node) : node;
+    }
+    ts.updateTypeOperatorNode = updateTypeOperatorNode;
+    function createIndexedAccessTypeNode(objectType, indexType) {
+        var node = createSynthesizedNode(171 /* IndexedAccessType */);
+        node.objectType = ts.parenthesizeElementTypeMember(objectType);
+        node.indexType = indexType;
+        return node;
+    }
+    ts.createIndexedAccessTypeNode = createIndexedAccessTypeNode;
+    function updateIndexedAccessTypeNode(node, objectType, indexType) {
+        return node.objectType !== objectType
+            || node.indexType !== indexType
+            ? updateNode(createIndexedAccessTypeNode(objectType, indexType), node)
+            : node;
+    }
+    ts.updateIndexedAccessTypeNode = updateIndexedAccessTypeNode;
+    function createMappedTypeNode(readonlyToken, typeParameter, questionToken, type) {
+        var node = createSynthesizedNode(172 /* MappedType */);
+        node.readonlyToken = readonlyToken;
+        node.typeParameter = typeParameter;
+        node.questionToken = questionToken;
+        node.type = type;
+        return node;
+    }
+    ts.createMappedTypeNode = createMappedTypeNode;
+    function updateMappedTypeNode(node, readonlyToken, typeParameter, questionToken, type) {
+        return node.readonlyToken !== readonlyToken
+            || node.typeParameter !== typeParameter
+            || node.questionToken !== questionToken
+            || node.type !== type
+            ? updateNode(createMappedTypeNode(readonlyToken, typeParameter, questionToken, type), node)
+            : node;
+    }
+    ts.updateMappedTypeNode = updateMappedTypeNode;
+    function createLiteralTypeNode(literal) {
+        var node = createSynthesizedNode(173 /* LiteralType */);
+        node.literal = literal;
+        return node;
+    }
+    ts.createLiteralTypeNode = createLiteralTypeNode;
+    function updateLiteralTypeNode(node, literal) {
+        return node.literal !== literal
+            ? updateNode(createLiteralTypeNode(literal), node)
+            : node;
+    }
+    ts.updateLiteralTypeNode = updateLiteralTypeNode;
+    // Binding Patterns
+    function createObjectBindingPattern(elements) {
+        var node = createSynthesizedNode(174 /* ObjectBindingPattern */);
+        node.elements = createNodeArray(elements);
+        return node;
+    }
+    ts.createObjectBindingPattern = createObjectBindingPattern;
+    function updateObjectBindingPattern(node, elements) {
+        return node.elements !== elements
+            ? updateNode(createObjectBindingPattern(elements), node)
+            : node;
+    }
+    ts.updateObjectBindingPattern = updateObjectBindingPattern;
+    function createArrayBindingPattern(elements) {
+        var node = createSynthesizedNode(175 /* ArrayBindingPattern */);
+        node.elements = createNodeArray(elements);
+        return node;
+    }
+    ts.createArrayBindingPattern = createArrayBindingPattern;
+    function updateArrayBindingPattern(node, elements) {
+        return node.elements !== elements
+            ? updateNode(createArrayBindingPattern(elements), node)
+            : node;
+    }
+    ts.updateArrayBindingPattern = updateArrayBindingPattern;
+    function createBindingElement(dotDotDotToken, propertyName, name, initializer) {
+        var node = createSynthesizedNode(176 /* BindingElement */);
+        node.dotDotDotToken = dotDotDotToken;
+        node.propertyName = asName(propertyName);
+        node.name = asName(name);
+        node.initializer = initializer;
+        return node;
+    }
+    ts.createBindingElement = createBindingElement;
+    function updateBindingElement(node, dotDotDotToken, propertyName, name, initializer) {
+        return node.propertyName !== propertyName
+            || node.dotDotDotToken !== dotDotDotToken
+            || node.name !== name
+            || node.initializer !== initializer
+            ? updateNode(createBindingElement(dotDotDotToken, propertyName, name, initializer), node)
+            : node;
+    }
+    ts.updateBindingElement = updateBindingElement;
+    // Expression
+    function createArrayLiteral(elements, multiLine) {
+        var node = createSynthesizedNode(177 /* ArrayLiteralExpression */);
+        node.elements = ts.parenthesizeListElements(createNodeArray(elements));
+        if (multiLine)
+            node.multiLine = true;
+        return node;
+    }
+    ts.createArrayLiteral = createArrayLiteral;
+    function updateArrayLiteral(node, elements) {
+        return node.elements !== elements
+            ? updateNode(createArrayLiteral(elements, node.multiLine), node)
+            : node;
+    }
+    ts.updateArrayLiteral = updateArrayLiteral;
+    function createObjectLiteral(properties, multiLine) {
+        var node = createSynthesizedNode(178 /* ObjectLiteralExpression */);
+        node.properties = createNodeArray(properties);
+        if (multiLine)
+            node.multiLine = true;
+        return node;
+    }
+    ts.createObjectLiteral = createObjectLiteral;
+    function updateObjectLiteral(node, properties) {
+        return node.properties !== properties
+            ? updateNode(createObjectLiteral(properties, node.multiLine), node)
+            : node;
+    }
+    ts.updateObjectLiteral = updateObjectLiteral;
+    function createPropertyAccess(expression, name) {
+        var node = createSynthesizedNode(179 /* PropertyAccessExpression */);
+        node.expression = ts.parenthesizeForAccess(expression);
+        node.name = asName(name);
+        setEmitFlags(node, 131072 /* NoIndentation */);
+        return node;
+    }
+    ts.createPropertyAccess = createPropertyAccess;
+    function updatePropertyAccess(node, expression, name) {
+        // Because we are updating existed propertyAccess we want to inherit its emitFlags
+        // instead of using the default from createPropertyAccess
+        return node.expression !== expression
+            || node.name !== name
+            ? updateNode(setEmitFlags(createPropertyAccess(expression, name), ts.getEmitFlags(node)), node)
+            : node;
+    }
+    ts.updatePropertyAccess = updatePropertyAccess;
+    function createElementAccess(expression, index) {
+        var node = createSynthesizedNode(180 /* ElementAccessExpression */);
+        node.expression = ts.parenthesizeForAccess(expression);
+        node.argumentExpression = asExpression(index);
+        return node;
     }
-    ts.getOptionNameMap = getOptionNameMap;
-    /* @internal */
-    function createCompilerDiagnosticForInvalidCustomType(opt) {
-        var namesOfType = [];
-        for (var key in opt.type) {
-            namesOfType.push(" '" + key + "'");
-        }
-        return ts.createCompilerDiagnostic(ts.Diagnostics.Argument_for_0_option_must_be_Colon_1, "--" + opt.name, namesOfType);
+    ts.createElementAccess = createElementAccess;
+    function updateElementAccess(node, expression, argumentExpression) {
+        return node.expression !== expression
+            || node.argumentExpression !== argumentExpression
+            ? updateNode(createElementAccess(expression, argumentExpression), node)
+            : node;
     }
-    ts.createCompilerDiagnosticForInvalidCustomType = createCompilerDiagnosticForInvalidCustomType;
-    /* @internal */
-    function parseCustomTypeOption(opt, value, errors) {
-        var key = trimString((value || "")).toLowerCase();
-        var map = opt.type;
-        if (key in map) {
-            return map[key];
-        }
-        else {
-            errors.push(createCompilerDiagnosticForInvalidCustomType(opt));
-        }
+    ts.updateElementAccess = updateElementAccess;
+    function createCall(expression, typeArguments, argumentsArray) {
+        var node = createSynthesizedNode(181 /* CallExpression */);
+        node.expression = ts.parenthesizeForAccess(expression);
+        node.typeArguments = asNodeArray(typeArguments);
+        node.arguments = ts.parenthesizeListElements(createNodeArray(argumentsArray));
+        return node;
     }
-    ts.parseCustomTypeOption = parseCustomTypeOption;
-    /* @internal */
-    function parseListTypeOption(opt, value, errors) {
-        if (value === void 0) { value = ""; }
-        value = trimString(value);
-        if (ts.startsWith(value, "-")) {
-            return undefined;
-        }
-        if (value === "") {
-            return [];
-        }
-        var values = value.split(",");
-        switch (opt.element.type) {
-            case "number":
-                return ts.map(values, parseInt);
-            case "string":
-                return ts.map(values, function (v) { return v || ""; });
-            default:
-                return ts.filter(ts.map(values, function (v) { return parseCustomTypeOption(opt.element, v, errors); }), function (v) { return !!v; });
-        }
+    ts.createCall = createCall;
+    function updateCall(node, expression, typeArguments, argumentsArray) {
+        return node.expression !== expression
+            || node.typeArguments !== typeArguments
+            || node.arguments !== argumentsArray
+            ? updateNode(createCall(expression, typeArguments, argumentsArray), node)
+            : node;
     }
-    ts.parseListTypeOption = parseListTypeOption;
-    /* @internal */
-    function parseCommandLine(commandLine, readFile) {
-        var options = {};
-        var fileNames = [];
-        var errors = [];
-        var _a = getOptionNameMap(), optionNameMap = _a.optionNameMap, shortOptionNames = _a.shortOptionNames;
-        parseStrings(commandLine);
-        return {
-            options: options,
-            fileNames: fileNames,
-            errors: errors
-        };
-        function parseStrings(args) {
-            var i = 0;
-            while (i < args.length) {
-                var s = args[i];
-                i++;
-                if (s.charCodeAt(0) === 64 /* at */) {
-                    parseResponseFile(s.slice(1));
-                }
-                else if (s.charCodeAt(0) === 45 /* minus */) {
-                    s = s.slice(s.charCodeAt(1) === 45 /* minus */ ? 2 : 1).toLowerCase();
-                    // Try to translate short option names to their full equivalents.
-                    if (s in shortOptionNames) {
-                        s = shortOptionNames[s];
-                    }
-                    if (s in optionNameMap) {
-                        var opt = optionNameMap[s];
-                        if (opt.isTSConfigOnly) {
-                            errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_can_only_be_specified_in_tsconfig_json_file, opt.name));
-                        }
-                        else {
-                            // Check to see if no argument was provided (e.g. "--locale" is the last command-line argument).
-                            if (!args[i] && opt.type !== "boolean") {
-                                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_expects_an_argument, opt.name));
-                            }
-                            switch (opt.type) {
-                                case "number":
-                                    options[opt.name] = parseInt(args[i]);
-                                    i++;
-                                    break;
-                                case "boolean":
-                                    options[opt.name] = true;
-                                    break;
-                                case "string":
-                                    options[opt.name] = args[i] || "";
-                                    i++;
-                                    break;
-                                case "list":
-                                    var result = parseListTypeOption(opt, args[i], errors);
-                                    options[opt.name] = result || [];
-                                    if (result) {
-                                        i++;
-                                    }
-                                    break;
-                                // If not a primitive, the possible types are specified in what is effectively a map of options.
-                                default:
-                                    options[opt.name] = parseCustomTypeOption(opt, args[i], errors);
-                                    i++;
-                                    break;
-                            }
-                        }
-                    }
-                    else {
-                        errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unknown_compiler_option_0, s));
-                    }
-                }
-                else {
-                    fileNames.push(s);
-                }
-            }
-        }
-        function parseResponseFile(fileName) {
-            var text = readFile ? readFile(fileName) : ts.sys.readFile(fileName);
-            if (!text) {
-                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.File_0_not_found, fileName));
-                return;
-            }
-            var args = [];
-            var pos = 0;
-            while (true) {
-                while (pos < text.length && text.charCodeAt(pos) <= 32 /* space */)
-                    pos++;
-                if (pos >= text.length)
-                    break;
-                var start = pos;
-                if (text.charCodeAt(start) === 34 /* doubleQuote */) {
-                    pos++;
-                    while (pos < text.length && text.charCodeAt(pos) !== 34 /* doubleQuote */)
-                        pos++;
-                    if (pos < text.length) {
-                        args.push(text.substring(start + 1, pos));
-                        pos++;
-                    }
-                    else {
-                        errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unterminated_quoted_string_in_response_file_0, fileName));
-                    }
-                }
-                else {
-                    while (text.charCodeAt(pos) > 32 /* space */)
-                        pos++;
-                    args.push(text.substring(start, pos));
-                }
-            }
-            parseStrings(args);
-        }
+    ts.updateCall = updateCall;
+    function createNew(expression, typeArguments, argumentsArray) {
+        var node = createSynthesizedNode(182 /* NewExpression */);
+        node.expression = ts.parenthesizeForNew(expression);
+        node.typeArguments = asNodeArray(typeArguments);
+        node.arguments = argumentsArray ? ts.parenthesizeListElements(createNodeArray(argumentsArray)) : undefined;
+        return node;
+    }
+    ts.createNew = createNew;
+    function updateNew(node, expression, typeArguments, argumentsArray) {
+        return node.expression !== expression
+            || node.typeArguments !== typeArguments
+            || node.arguments !== argumentsArray
+            ? updateNode(createNew(expression, typeArguments, argumentsArray), node)
+            : node;
+    }
+    ts.updateNew = updateNew;
+    function createTaggedTemplate(tag, template) {
+        var node = createSynthesizedNode(183 /* TaggedTemplateExpression */);
+        node.tag = ts.parenthesizeForAccess(tag);
+        node.template = template;
+        return node;
+    }
+    ts.createTaggedTemplate = createTaggedTemplate;
+    function updateTaggedTemplate(node, tag, template) {
+        return node.tag !== tag
+            || node.template !== template
+            ? updateNode(createTaggedTemplate(tag, template), node)
+            : node;
+    }
+    ts.updateTaggedTemplate = updateTaggedTemplate;
+    function createTypeAssertion(type, expression) {
+        var node = createSynthesizedNode(184 /* TypeAssertionExpression */);
+        node.type = type;
+        node.expression = ts.parenthesizePrefixOperand(expression);
+        return node;
+    }
+    ts.createTypeAssertion = createTypeAssertion;
+    function updateTypeAssertion(node, type, expression) {
+        return node.type !== type
+            || node.expression !== expression
+            ? updateNode(createTypeAssertion(type, expression), node)
+            : node;
+    }
+    ts.updateTypeAssertion = updateTypeAssertion;
+    function createParen(expression) {
+        var node = createSynthesizedNode(185 /* ParenthesizedExpression */);
+        node.expression = expression;
+        return node;
+    }
+    ts.createParen = createParen;
+    function updateParen(node, expression) {
+        return node.expression !== expression
+            ? updateNode(createParen(expression), node)
+            : node;
+    }
+    ts.updateParen = updateParen;
+    function createFunctionExpression(modifiers, asteriskToken, name, typeParameters, parameters, type, body) {
+        var node = createSynthesizedNode(186 /* FunctionExpression */);
+        node.modifiers = asNodeArray(modifiers);
+        node.asteriskToken = asteriskToken;
+        node.name = asName(name);
+        node.typeParameters = asNodeArray(typeParameters);
+        node.parameters = createNodeArray(parameters);
+        node.type = type;
+        node.body = body;
+        return node;
+    }
+    ts.createFunctionExpression = createFunctionExpression;
+    function updateFunctionExpression(node, modifiers, asteriskToken, name, typeParameters, parameters, type, body) {
+        return node.name !== name
+            || node.modifiers !== modifiers
+            || node.asteriskToken !== asteriskToken
+            || node.typeParameters !== typeParameters
+            || node.parameters !== parameters
+            || node.type !== type
+            || node.body !== body
+            ? updateNode(createFunctionExpression(modifiers, asteriskToken, name, typeParameters, parameters, type, body), node)
+            : node;
+    }
+    ts.updateFunctionExpression = updateFunctionExpression;
+    function createArrowFunction(modifiers, typeParameters, parameters, type, equalsGreaterThanToken, body) {
+        var node = createSynthesizedNode(187 /* ArrowFunction */);
+        node.modifiers = asNodeArray(modifiers);
+        node.typeParameters = asNodeArray(typeParameters);
+        node.parameters = createNodeArray(parameters);
+        node.type = type;
+        node.equalsGreaterThanToken = equalsGreaterThanToken || createToken(36 /* EqualsGreaterThanToken */);
+        node.body = ts.parenthesizeConciseBody(body);
+        return node;
+    }
+    ts.createArrowFunction = createArrowFunction;
+    function updateArrowFunction(node, modifiers, typeParameters, parameters, type, body) {
+        return node.modifiers !== modifiers
+            || node.typeParameters !== typeParameters
+            || node.parameters !== parameters
+            || node.type !== type
+            || node.body !== body
+            ? updateNode(createArrowFunction(modifiers, typeParameters, parameters, type, node.equalsGreaterThanToken, body), node)
+            : node;
+    }
+    ts.updateArrowFunction = updateArrowFunction;
+    function createDelete(expression) {
+        var node = createSynthesizedNode(188 /* DeleteExpression */);
+        node.expression = ts.parenthesizePrefixOperand(expression);
+        return node;
+    }
+    ts.createDelete = createDelete;
+    function updateDelete(node, expression) {
+        return node.expression !== expression
+            ? updateNode(createDelete(expression), node)
+            : node;
+    }
+    ts.updateDelete = updateDelete;
+    function createTypeOf(expression) {
+        var node = createSynthesizedNode(189 /* TypeOfExpression */);
+        node.expression = ts.parenthesizePrefixOperand(expression);
+        return node;
+    }
+    ts.createTypeOf = createTypeOf;
+    function updateTypeOf(node, expression) {
+        return node.expression !== expression
+            ? updateNode(createTypeOf(expression), node)
+            : node;
+    }
+    ts.updateTypeOf = updateTypeOf;
+    function createVoid(expression) {
+        var node = createSynthesizedNode(190 /* VoidExpression */);
+        node.expression = ts.parenthesizePrefixOperand(expression);
+        return node;
+    }
+    ts.createVoid = createVoid;
+    function updateVoid(node, expression) {
+        return node.expression !== expression
+            ? updateNode(createVoid(expression), node)
+            : node;
+    }
+    ts.updateVoid = updateVoid;
+    function createAwait(expression) {
+        var node = createSynthesizedNode(191 /* AwaitExpression */);
+        node.expression = ts.parenthesizePrefixOperand(expression);
+        return node;
+    }
+    ts.createAwait = createAwait;
+    function updateAwait(node, expression) {
+        return node.expression !== expression
+            ? updateNode(createAwait(expression), node)
+            : node;
+    }
+    ts.updateAwait = updateAwait;
+    function createPrefix(operator, operand) {
+        var node = createSynthesizedNode(192 /* PrefixUnaryExpression */);
+        node.operator = operator;
+        node.operand = ts.parenthesizePrefixOperand(operand);
+        return node;
+    }
+    ts.createPrefix = createPrefix;
+    function updatePrefix(node, operand) {
+        return node.operand !== operand
+            ? updateNode(createPrefix(node.operator, operand), node)
+            : node;
+    }
+    ts.updatePrefix = updatePrefix;
+    function createPostfix(operand, operator) {
+        var node = createSynthesizedNode(193 /* PostfixUnaryExpression */);
+        node.operand = ts.parenthesizePostfixOperand(operand);
+        node.operator = operator;
+        return node;
+    }
+    ts.createPostfix = createPostfix;
+    function updatePostfix(node, operand) {
+        return node.operand !== operand
+            ? updateNode(createPostfix(operand, node.operator), node)
+            : node;
+    }
+    ts.updatePostfix = updatePostfix;
+    function createBinary(left, operator, right) {
+        var node = createSynthesizedNode(194 /* BinaryExpression */);
+        var operatorToken = asToken(operator);
+        var operatorKind = operatorToken.kind;
+        node.left = ts.parenthesizeBinaryOperand(operatorKind, left, /*isLeftSideOfBinary*/ true, /*leftOperand*/ undefined);
+        node.operatorToken = operatorToken;
+        node.right = ts.parenthesizeBinaryOperand(operatorKind, right, /*isLeftSideOfBinary*/ false, node.left);
+        return node;
+    }
+    ts.createBinary = createBinary;
+    function updateBinary(node, left, right, operator) {
+        return node.left !== left
+            || node.right !== right
+            ? updateNode(createBinary(left, operator || node.operatorToken, right), node)
+            : node;
+    }
+    ts.updateBinary = updateBinary;
+    function createConditional(condition, questionTokenOrWhenTrue, whenTrueOrWhenFalse, colonToken, whenFalse) {
+        var node = createSynthesizedNode(195 /* ConditionalExpression */);
+        node.condition = ts.parenthesizeForConditionalHead(condition);
+        node.questionToken = whenFalse ? questionTokenOrWhenTrue : createToken(55 /* QuestionToken */);
+        node.whenTrue = ts.parenthesizeSubexpressionOfConditionalExpression(whenFalse ? whenTrueOrWhenFalse : questionTokenOrWhenTrue);
+        node.colonToken = whenFalse ? colonToken : createToken(56 /* ColonToken */);
+        node.whenFalse = ts.parenthesizeSubexpressionOfConditionalExpression(whenFalse ? whenFalse : whenTrueOrWhenFalse);
+        return node;
+    }
+    ts.createConditional = createConditional;
+    function updateConditional(node, condition, whenTrue, whenFalse) {
+        return node.condition !== condition
+            || node.whenTrue !== whenTrue
+            || node.whenFalse !== whenFalse
+            ? updateNode(createConditional(condition, node.questionToken, whenTrue, node.colonToken, whenFalse), node)
+            : node;
+    }
+    ts.updateConditional = updateConditional;
+    function createTemplateExpression(head, templateSpans) {
+        var node = createSynthesizedNode(196 /* TemplateExpression */);
+        node.head = head;
+        node.templateSpans = createNodeArray(templateSpans);
+        return node;
+    }
+    ts.createTemplateExpression = createTemplateExpression;
+    function updateTemplateExpression(node, head, templateSpans) {
+        return node.head !== head
+            || node.templateSpans !== templateSpans
+            ? updateNode(createTemplateExpression(head, templateSpans), node)
+            : node;
+    }
+    ts.updateTemplateExpression = updateTemplateExpression;
+    function createYield(asteriskTokenOrExpression, expression) {
+        var node = createSynthesizedNode(197 /* YieldExpression */);
+        node.asteriskToken = asteriskTokenOrExpression && asteriskTokenOrExpression.kind === 39 /* AsteriskToken */ ? asteriskTokenOrExpression : undefined;
+        node.expression = asteriskTokenOrExpression && asteriskTokenOrExpression.kind !== 39 /* AsteriskToken */ ? asteriskTokenOrExpression : expression;
+        return node;
+    }
+    ts.createYield = createYield;
+    function updateYield(node, asteriskToken, expression) {
+        return node.expression !== expression
+            || node.asteriskToken !== asteriskToken
+            ? updateNode(createYield(asteriskToken, expression), node)
+            : node;
+    }
+    ts.updateYield = updateYield;
+    function createSpread(expression) {
+        var node = createSynthesizedNode(198 /* SpreadElement */);
+        node.expression = ts.parenthesizeExpressionForList(expression);
+        return node;
+    }
+    ts.createSpread = createSpread;
+    function updateSpread(node, expression) {
+        return node.expression !== expression
+            ? updateNode(createSpread(expression), node)
+            : node;
+    }
+    ts.updateSpread = updateSpread;
+    function createClassExpression(modifiers, name, typeParameters, heritageClauses, members) {
+        var node = createSynthesizedNode(199 /* ClassExpression */);
+        node.decorators = undefined;
+        node.modifiers = asNodeArray(modifiers);
+        node.name = asName(name);
+        node.typeParameters = asNodeArray(typeParameters);
+        node.heritageClauses = asNodeArray(heritageClauses);
+        node.members = createNodeArray(members);
+        return node;
+    }
+    ts.createClassExpression = createClassExpression;
+    function updateClassExpression(node, modifiers, name, typeParameters, heritageClauses, members) {
+        return node.modifiers !== modifiers
+            || node.name !== name
+            || node.typeParameters !== typeParameters
+            || node.heritageClauses !== heritageClauses
+            || node.members !== members
+            ? updateNode(createClassExpression(modifiers, name, typeParameters, heritageClauses, members), node)
+            : node;
+    }
+    ts.updateClassExpression = updateClassExpression;
+    function createOmittedExpression() {
+        return createSynthesizedNode(200 /* OmittedExpression */);
+    }
+    ts.createOmittedExpression = createOmittedExpression;
+    function createExpressionWithTypeArguments(typeArguments, expression) {
+        var node = createSynthesizedNode(201 /* ExpressionWithTypeArguments */);
+        node.expression = ts.parenthesizeForAccess(expression);
+        node.typeArguments = asNodeArray(typeArguments);
+        return node;
+    }
+    ts.createExpressionWithTypeArguments = createExpressionWithTypeArguments;
+    function updateExpressionWithTypeArguments(node, typeArguments, expression) {
+        return node.typeArguments !== typeArguments
+            || node.expression !== expression
+            ? updateNode(createExpressionWithTypeArguments(typeArguments, expression), node)
+            : node;
+    }
+    ts.updateExpressionWithTypeArguments = updateExpressionWithTypeArguments;
+    function createAsExpression(expression, type) {
+        var node = createSynthesizedNode(202 /* AsExpression */);
+        node.expression = expression;
+        node.type = type;
+        return node;
+    }
+    ts.createAsExpression = createAsExpression;
+    function updateAsExpression(node, expression, type) {
+        return node.expression !== expression
+            || node.type !== type
+            ? updateNode(createAsExpression(expression, type), node)
+            : node;
+    }
+    ts.updateAsExpression = updateAsExpression;
+    function createNonNullExpression(expression) {
+        var node = createSynthesizedNode(203 /* NonNullExpression */);
+        node.expression = ts.parenthesizeForAccess(expression);
+        return node;
+    }
+    ts.createNonNullExpression = createNonNullExpression;
+    function updateNonNullExpression(node, expression) {
+        return node.expression !== expression
+            ? updateNode(createNonNullExpression(expression), node)
+            : node;
+    }
+    ts.updateNonNullExpression = updateNonNullExpression;
+    function createMetaProperty(keywordToken, name) {
+        var node = createSynthesizedNode(204 /* MetaProperty */);
+        node.keywordToken = keywordToken;
+        node.name = name;
+        return node;
+    }
+    ts.createMetaProperty = createMetaProperty;
+    function updateMetaProperty(node, name) {
+        return node.name !== name
+            ? updateNode(createMetaProperty(node.keywordToken, name), node)
+            : node;
+    }
+    ts.updateMetaProperty = updateMetaProperty;
+    // Misc
+    function createTemplateSpan(expression, literal) {
+        var node = createSynthesizedNode(205 /* TemplateSpan */);
+        node.expression = expression;
+        node.literal = literal;
+        return node;
+    }
+    ts.createTemplateSpan = createTemplateSpan;
+    function updateTemplateSpan(node, expression, literal) {
+        return node.expression !== expression
+            || node.literal !== literal
+            ? updateNode(createTemplateSpan(expression, literal), node)
+            : node;
+    }
+    ts.updateTemplateSpan = updateTemplateSpan;
+    function createSemicolonClassElement() {
+        return createSynthesizedNode(206 /* SemicolonClassElement */);
+    }
+    ts.createSemicolonClassElement = createSemicolonClassElement;
+    // Element
+    function createBlock(statements, multiLine) {
+        var block = createSynthesizedNode(207 /* Block */);
+        block.statements = createNodeArray(statements);
+        if (multiLine)
+            block.multiLine = multiLine;
+        return block;
+    }
+    ts.createBlock = createBlock;
+    function updateBlock(node, statements) {
+        return node.statements !== statements
+            ? updateNode(createBlock(statements, node.multiLine), node)
+            : node;
+    }
+    ts.updateBlock = updateBlock;
+    function createVariableStatement(modifiers, declarationList) {
+        var node = createSynthesizedNode(208 /* VariableStatement */);
+        node.decorators = undefined;
+        node.modifiers = asNodeArray(modifiers);
+        node.declarationList = ts.isArray(declarationList) ? createVariableDeclarationList(declarationList) : declarationList;
+        return node;
+    }
+    ts.createVariableStatement = createVariableStatement;
+    function updateVariableStatement(node, modifiers, declarationList) {
+        return node.modifiers !== modifiers
+            || node.declarationList !== declarationList
+            ? updateNode(createVariableStatement(modifiers, declarationList), node)
+            : node;
+    }
+    ts.updateVariableStatement = updateVariableStatement;
+    function createEmptyStatement() {
+        return createSynthesizedNode(209 /* EmptyStatement */);
+    }
+    ts.createEmptyStatement = createEmptyStatement;
+    function createStatement(expression) {
+        var node = createSynthesizedNode(210 /* ExpressionStatement */);
+        node.expression = ts.parenthesizeExpressionForExpressionStatement(expression);
+        return node;
+    }
+    ts.createStatement = createStatement;
+    function updateStatement(node, expression) {
+        return node.expression !== expression
+            ? updateNode(createStatement(expression), node)
+            : node;
+    }
+    ts.updateStatement = updateStatement;
+    function createIf(expression, thenStatement, elseStatement) {
+        var node = createSynthesizedNode(211 /* IfStatement */);
+        node.expression = expression;
+        node.thenStatement = thenStatement;
+        node.elseStatement = elseStatement;
+        return node;
+    }
+    ts.createIf = createIf;
+    function updateIf(node, expression, thenStatement, elseStatement) {
+        return node.expression !== expression
+            || node.thenStatement !== thenStatement
+            || node.elseStatement !== elseStatement
+            ? updateNode(createIf(expression, thenStatement, elseStatement), node)
+            : node;
+    }
+    ts.updateIf = updateIf;
+    function createDo(statement, expression) {
+        var node = createSynthesizedNode(212 /* DoStatement */);
+        node.statement = statement;
+        node.expression = expression;
+        return node;
+    }
+    ts.createDo = createDo;
+    function updateDo(node, statement, expression) {
+        return node.statement !== statement
+            || node.expression !== expression
+            ? updateNode(createDo(statement, expression), node)
+            : node;
+    }
+    ts.updateDo = updateDo;
+    function createWhile(expression, statement) {
+        var node = createSynthesizedNode(213 /* WhileStatement */);
+        node.expression = expression;
+        node.statement = statement;
+        return node;
+    }
+    ts.createWhile = createWhile;
+    function updateWhile(node, expression, statement) {
+        return node.expression !== expression
+            || node.statement !== statement
+            ? updateNode(createWhile(expression, statement), node)
+            : node;
+    }
+    ts.updateWhile = updateWhile;
+    function createFor(initializer, condition, incrementor, statement) {
+        var node = createSynthesizedNode(214 /* ForStatement */);
+        node.initializer = initializer;
+        node.condition = condition;
+        node.incrementor = incrementor;
+        node.statement = statement;
+        return node;
+    }
+    ts.createFor = createFor;
+    function updateFor(node, initializer, condition, incrementor, statement) {
+        return node.initializer !== initializer
+            || node.condition !== condition
+            || node.incrementor !== incrementor
+            || node.statement !== statement
+            ? updateNode(createFor(initializer, condition, incrementor, statement), node)
+            : node;
+    }
+    ts.updateFor = updateFor;
+    function createForIn(initializer, expression, statement) {
+        var node = createSynthesizedNode(215 /* ForInStatement */);
+        node.initializer = initializer;
+        node.expression = expression;
+        node.statement = statement;
+        return node;
+    }
+    ts.createForIn = createForIn;
+    function updateForIn(node, initializer, expression, statement) {
+        return node.initializer !== initializer
+            || node.expression !== expression
+            || node.statement !== statement
+            ? updateNode(createForIn(initializer, expression, statement), node)
+            : node;
+    }
+    ts.updateForIn = updateForIn;
+    function createForOf(awaitModifier, initializer, expression, statement) {
+        var node = createSynthesizedNode(216 /* ForOfStatement */);
+        node.awaitModifier = awaitModifier;
+        node.initializer = initializer;
+        node.expression = expression;
+        node.statement = statement;
+        return node;
+    }
+    ts.createForOf = createForOf;
+    function updateForOf(node, awaitModifier, initializer, expression, statement) {
+        return node.awaitModifier !== awaitModifier
+            || node.initializer !== initializer
+            || node.expression !== expression
+            || node.statement !== statement
+            ? updateNode(createForOf(awaitModifier, initializer, expression, statement), node)
+            : node;
+    }
+    ts.updateForOf = updateForOf;
+    function createContinue(label) {
+        var node = createSynthesizedNode(217 /* ContinueStatement */);
+        node.label = asName(label);
+        return node;
+    }
+    ts.createContinue = createContinue;
+    function updateContinue(node, label) {
+        return node.label !== label
+            ? updateNode(createContinue(label), node)
+            : node;
+    }
+    ts.updateContinue = updateContinue;
+    function createBreak(label) {
+        var node = createSynthesizedNode(218 /* BreakStatement */);
+        node.label = asName(label);
+        return node;
+    }
+    ts.createBreak = createBreak;
+    function updateBreak(node, label) {
+        return node.label !== label
+            ? updateNode(createBreak(label), node)
+            : node;
+    }
+    ts.updateBreak = updateBreak;
+    function createReturn(expression) {
+        var node = createSynthesizedNode(219 /* ReturnStatement */);
+        node.expression = expression;
+        return node;
+    }
+    ts.createReturn = createReturn;
+    function updateReturn(node, expression) {
+        return node.expression !== expression
+            ? updateNode(createReturn(expression), node)
+            : node;
+    }
+    ts.updateReturn = updateReturn;
+    function createWith(expression, statement) {
+        var node = createSynthesizedNode(220 /* WithStatement */);
+        node.expression = expression;
+        node.statement = statement;
+        return node;
+    }
+    ts.createWith = createWith;
+    function updateWith(node, expression, statement) {
+        return node.expression !== expression
+            || node.statement !== statement
+            ? updateNode(createWith(expression, statement), node)
+            : node;
+    }
+    ts.updateWith = updateWith;
+    function createSwitch(expression, caseBlock) {
+        var node = createSynthesizedNode(221 /* SwitchStatement */);
+        node.expression = ts.parenthesizeExpressionForList(expression);
+        node.caseBlock = caseBlock;
+        return node;
+    }
+    ts.createSwitch = createSwitch;
+    function updateSwitch(node, expression, caseBlock) {
+        return node.expression !== expression
+            || node.caseBlock !== caseBlock
+            ? updateNode(createSwitch(expression, caseBlock), node)
+            : node;
+    }
+    ts.updateSwitch = updateSwitch;
+    function createLabel(label, statement) {
+        var node = createSynthesizedNode(222 /* LabeledStatement */);
+        node.label = asName(label);
+        node.statement = statement;
+        return node;
+    }
+    ts.createLabel = createLabel;
+    function updateLabel(node, label, statement) {
+        return node.label !== label
+            || node.statement !== statement
+            ? updateNode(createLabel(label, statement), node)
+            : node;
+    }
+    ts.updateLabel = updateLabel;
+    function createThrow(expression) {
+        var node = createSynthesizedNode(223 /* ThrowStatement */);
+        node.expression = expression;
+        return node;
+    }
+    ts.createThrow = createThrow;
+    function updateThrow(node, expression) {
+        return node.expression !== expression
+            ? updateNode(createThrow(expression), node)
+            : node;
+    }
+    ts.updateThrow = updateThrow;
+    function createTry(tryBlock, catchClause, finallyBlock) {
+        var node = createSynthesizedNode(224 /* TryStatement */);
+        node.tryBlock = tryBlock;
+        node.catchClause = catchClause;
+        node.finallyBlock = finallyBlock;
+        return node;
+    }
+    ts.createTry = createTry;
+    function updateTry(node, tryBlock, catchClause, finallyBlock) {
+        return node.tryBlock !== tryBlock
+            || node.catchClause !== catchClause
+            || node.finallyBlock !== finallyBlock
+            ? updateNode(createTry(tryBlock, catchClause, finallyBlock), node)
+            : node;
+    }
+    ts.updateTry = updateTry;
+    function createDebuggerStatement() {
+        return createSynthesizedNode(225 /* DebuggerStatement */);
+    }
+    ts.createDebuggerStatement = createDebuggerStatement;
+    function createVariableDeclaration(name, type, initializer) {
+        var node = createSynthesizedNode(226 /* VariableDeclaration */);
+        node.name = asName(name);
+        node.type = type;
+        node.initializer = initializer !== undefined ? ts.parenthesizeExpressionForList(initializer) : undefined;
+        return node;
+    }
+    ts.createVariableDeclaration = createVariableDeclaration;
+    function updateVariableDeclaration(node, name, type, initializer) {
+        return node.name !== name
+            || node.type !== type
+            || node.initializer !== initializer
+            ? updateNode(createVariableDeclaration(name, type, initializer), node)
+            : node;
+    }
+    ts.updateVariableDeclaration = updateVariableDeclaration;
+    function createVariableDeclarationList(declarations, flags) {
+        var node = createSynthesizedNode(227 /* VariableDeclarationList */);
+        node.flags |= flags & 3 /* BlockScoped */;
+        node.declarations = createNodeArray(declarations);
+        return node;
+    }
+    ts.createVariableDeclarationList = createVariableDeclarationList;
+    function updateVariableDeclarationList(node, declarations) {
+        return node.declarations !== declarations
+            ? updateNode(createVariableDeclarationList(declarations, node.flags), node)
+            : node;
+    }
+    ts.updateVariableDeclarationList = updateVariableDeclarationList;
+    function createFunctionDeclaration(decorators, modifiers, asteriskToken, name, typeParameters, parameters, type, body) {
+        var node = createSynthesizedNode(228 /* FunctionDeclaration */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.asteriskToken = asteriskToken;
+        node.name = asName(name);
+        node.typeParameters = asNodeArray(typeParameters);
+        node.parameters = createNodeArray(parameters);
+        node.type = type;
+        node.body = body;
+        return node;
+    }
+    ts.createFunctionDeclaration = createFunctionDeclaration;
+    function updateFunctionDeclaration(node, decorators, modifiers, asteriskToken, name, typeParameters, parameters, type, body) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.asteriskToken !== asteriskToken
+            || node.name !== name
+            || node.typeParameters !== typeParameters
+            || node.parameters !== parameters
+            || node.type !== type
+            || node.body !== body
+            ? updateNode(createFunctionDeclaration(decorators, modifiers, asteriskToken, name, typeParameters, parameters, type, body), node)
+            : node;
+    }
+    ts.updateFunctionDeclaration = updateFunctionDeclaration;
+    function createClassDeclaration(decorators, modifiers, name, typeParameters, heritageClauses, members) {
+        var node = createSynthesizedNode(229 /* ClassDeclaration */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.name = asName(name);
+        node.typeParameters = asNodeArray(typeParameters);
+        node.heritageClauses = asNodeArray(heritageClauses);
+        node.members = createNodeArray(members);
+        return node;
+    }
+    ts.createClassDeclaration = createClassDeclaration;
+    function updateClassDeclaration(node, decorators, modifiers, name, typeParameters, heritageClauses, members) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.name !== name
+            || node.typeParameters !== typeParameters
+            || node.heritageClauses !== heritageClauses
+            || node.members !== members
+            ? updateNode(createClassDeclaration(decorators, modifiers, name, typeParameters, heritageClauses, members), node)
+            : node;
+    }
+    ts.updateClassDeclaration = updateClassDeclaration;
+    function createInterfaceDeclaration(decorators, modifiers, name, typeParameters, heritageClauses, members) {
+        var node = createSynthesizedNode(230 /* InterfaceDeclaration */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.name = asName(name);
+        node.typeParameters = asNodeArray(typeParameters);
+        node.heritageClauses = asNodeArray(heritageClauses);
+        node.members = createNodeArray(members);
+        return node;
+    }
+    ts.createInterfaceDeclaration = createInterfaceDeclaration;
+    function updateInterfaceDeclaration(node, decorators, modifiers, name, typeParameters, heritageClauses, members) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.name !== name
+            || node.typeParameters !== typeParameters
+            || node.heritageClauses !== heritageClauses
+            || node.members !== members
+            ? updateNode(createInterfaceDeclaration(decorators, modifiers, name, typeParameters, heritageClauses, members), node)
+            : node;
+    }
+    ts.updateInterfaceDeclaration = updateInterfaceDeclaration;
+    function createTypeAliasDeclaration(decorators, modifiers, name, typeParameters, type) {
+        var node = createSynthesizedNode(231 /* TypeAliasDeclaration */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.name = asName(name);
+        node.typeParameters = asNodeArray(typeParameters);
+        node.type = type;
+        return node;
+    }
+    ts.createTypeAliasDeclaration = createTypeAliasDeclaration;
+    function updateTypeAliasDeclaration(node, decorators, modifiers, name, typeParameters, type) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.name !== name
+            || node.typeParameters !== typeParameters
+            || node.type !== type
+            ? updateNode(createTypeAliasDeclaration(decorators, modifiers, name, typeParameters, type), node)
+            : node;
+    }
+    ts.updateTypeAliasDeclaration = updateTypeAliasDeclaration;
+    function createEnumDeclaration(decorators, modifiers, name, members) {
+        var node = createSynthesizedNode(232 /* EnumDeclaration */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.name = asName(name);
+        node.members = createNodeArray(members);
+        return node;
+    }
+    ts.createEnumDeclaration = createEnumDeclaration;
+    function updateEnumDeclaration(node, decorators, modifiers, name, members) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.name !== name
+            || node.members !== members
+            ? updateNode(createEnumDeclaration(decorators, modifiers, name, members), node)
+            : node;
     }
-    ts.parseCommandLine = parseCommandLine;
-    /**
-      * Read tsconfig.json file
-      * @param fileName The path to the config file
-      */
-    function readConfigFile(fileName, readFile) {
-        var text = "";
-        try {
-            text = readFile(fileName);
-        }
-        catch (e) {
-            return { error: ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_read_file_0_Colon_1, fileName, e.message) };
-        }
-        return parseConfigFileTextToJson(fileName, text);
+    ts.updateEnumDeclaration = updateEnumDeclaration;
+    function createModuleDeclaration(decorators, modifiers, name, body, flags) {
+        var node = createSynthesizedNode(233 /* ModuleDeclaration */);
+        node.flags |= flags & (16 /* Namespace */ | 4 /* NestedNamespace */ | 512 /* GlobalAugmentation */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.name = name;
+        node.body = body;
+        return node;
     }
-    ts.readConfigFile = readConfigFile;
-    /**
-      * Parse the text of the tsconfig.json file
-      * @param fileName The path to the config file
-      * @param jsonText The text of the config file
-      */
-    function parseConfigFileTextToJson(fileName, jsonText, stripComments) {
-        if (stripComments === void 0) { stripComments = true; }
-        try {
-            var jsonTextToParse = stripComments ? removeComments(jsonText) : jsonText;
-            return { config: /\S/.test(jsonTextToParse) ? JSON.parse(jsonTextToParse) : {} };
-        }
-        catch (e) {
-            return { error: ts.createCompilerDiagnostic(ts.Diagnostics.Failed_to_parse_file_0_Colon_1, fileName, e.message) };
-        }
+    ts.createModuleDeclaration = createModuleDeclaration;
+    function updateModuleDeclaration(node, decorators, modifiers, name, body) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.name !== name
+            || node.body !== body
+            ? updateNode(createModuleDeclaration(decorators, modifiers, name, body, node.flags), node)
+            : node;
     }
-    ts.parseConfigFileTextToJson = parseConfigFileTextToJson;
-    /**
-     * Generate tsconfig configuration when running command line "--init"
-     * @param options commandlineOptions to be generated into tsconfig.json
-     * @param fileNames array of filenames to be generated into tsconfig.json
-     */
-    /* @internal */
-    function generateTSConfig(options, fileNames) {
-        var compilerOptions = ts.extend(options, ts.defaultInitCompilerOptions);
-        var configurations = {
-            compilerOptions: serializeCompilerOptions(compilerOptions)
-        };
-        if (fileNames && fileNames.length) {
-            // only set the files property if we have at least one file
-            configurations.files = fileNames;
-        }
-        return configurations;
-        function getCustomTypeMapOfCommandLineOption(optionDefinition) {
-            if (optionDefinition.type === "string" || optionDefinition.type === "number" || optionDefinition.type === "boolean") {
-                // this is of a type CommandLineOptionOfPrimitiveType
-                return undefined;
-            }
-            else if (optionDefinition.type === "list") {
-                return getCustomTypeMapOfCommandLineOption(optionDefinition.element);
-            }
-            else {
-                return optionDefinition.type;
-            }
-        }
-        function getNameOfCompilerOptionValue(value, customTypeMap) {
-            // There is a typeMap associated with this command-line option so use it to map value back to its name
-            for (var key in customTypeMap) {
-                if (customTypeMap[key] === value) {
-                    return key;
-                }
-            }
-            return undefined;
-        }
-        function serializeCompilerOptions(options) {
-            var result = ts.createMap();
-            var optionsNameMap = getOptionNameMap().optionNameMap;
-            for (var name_26 in options) {
-                if (ts.hasProperty(options, name_26)) {
-                    // tsconfig only options cannot be specified via command line,
-                    // so we can assume that only types that can appear here string | number | boolean
-                    switch (name_26) {
-                        case "init":
-                        case "watch":
-                        case "version":
-                        case "help":
-                        case "project":
-                            break;
-                        default:
-                            var value = options[name_26];
-                            var optionDefinition = optionsNameMap[name_26.toLowerCase()];
-                            if (optionDefinition) {
-                                var customTypeMap = getCustomTypeMapOfCommandLineOption(optionDefinition);
-                                if (!customTypeMap) {
-                                    // There is no map associated with this compiler option then use the value as-is
-                                    // This is the case if the value is expect to be string, number, boolean or list of string
-                                    result[name_26] = value;
-                                }
-                                else {
-                                    if (optionDefinition.type === "list") {
-                                        var convertedValue = [];
-                                        for (var _i = 0, _a = value; _i < _a.length; _i++) {
-                                            var element = _a[_i];
-                                            convertedValue.push(getNameOfCompilerOptionValue(element, customTypeMap));
-                                        }
-                                        result[name_26] = convertedValue;
-                                    }
-                                    else {
-                                        // There is a typeMap associated with this command-line option so use it to map value back to its name
-                                        result[name_26] = getNameOfCompilerOptionValue(value, customTypeMap);
-                                    }
-                                }
-                            }
-                            break;
-                    }
-                }
-            }
-            return result;
-        }
+    ts.updateModuleDeclaration = updateModuleDeclaration;
+    function createModuleBlock(statements) {
+        var node = createSynthesizedNode(234 /* ModuleBlock */);
+        node.statements = createNodeArray(statements);
+        return node;
     }
-    ts.generateTSConfig = generateTSConfig;
-    /**
-     * Remove the comments from a json like text.
-     * Comments can be single line comments (starting with # or //) or multiline comments using / * * /
-     *
-     * This method replace comment content by whitespace rather than completely remove them to keep positions in json parsing error reporting accurate.
-     */
-    function removeComments(jsonText) {
-        var output = "";
-        var scanner = ts.createScanner(1 /* ES5 */, /* skipTrivia */ false, 0 /* Standard */, jsonText);
-        var token;
-        while ((token = scanner.scan()) !== 1 /* EndOfFileToken */) {
-            switch (token) {
-                case 2 /* SingleLineCommentTrivia */:
-                case 3 /* MultiLineCommentTrivia */:
-                    // replace comments with whitespace to preserve original character positions
-                    output += scanner.getTokenText().replace(/\S/g, " ");
-                    break;
-                default:
-                    output += scanner.getTokenText();
-                    break;
-            }
-        }
-        return output;
+    ts.createModuleBlock = createModuleBlock;
+    function updateModuleBlock(node, statements) {
+        return node.statements !== statements
+            ? updateNode(createModuleBlock(statements), node)
+            : node;
     }
-    /**
-      * Parse the contents of a config file (tsconfig.json).
-      * @param json The contents of the config file to parse
-      * @param host Instance of ParseConfigHost used to enumerate files in folder.
-      * @param basePath A root directory to resolve relative path entries in the config
-      *    file to. e.g. outDir
-      */
-    function parseJsonConfigFileContent(json, host, basePath, existingOptions, configFileName, resolutionStack) {
-        if (existingOptions === void 0) { existingOptions = {}; }
-        if (resolutionStack === void 0) { resolutionStack = []; }
-        var errors = [];
-        var getCanonicalFileName = ts.createGetCanonicalFileName(host.useCaseSensitiveFileNames);
-        var resolvedPath = ts.toPath(configFileName || "", basePath, getCanonicalFileName);
-        if (resolutionStack.indexOf(resolvedPath) >= 0) {
-            return {
-                options: {},
-                fileNames: [],
-                typingOptions: {},
-                raw: json,
-                errors: [ts.createCompilerDiagnostic(ts.Diagnostics.Circularity_detected_while_resolving_configuration_Colon_0, resolutionStack.concat([resolvedPath]).join(" -> "))],
-                wildcardDirectories: {}
-            };
-        }
-        var options = convertCompilerOptionsFromJsonWorker(json["compilerOptions"], basePath, errors, configFileName);
-        var typingOptions = convertTypingOptionsFromJsonWorker(json["typingOptions"], basePath, errors, configFileName);
-        if (json["extends"]) {
-            var _a = [undefined, undefined, undefined, {}], include = _a[0], exclude = _a[1], files = _a[2], baseOptions = _a[3];
-            if (typeof json["extends"] === "string") {
-                _b = (tryExtendsName(json["extends"]) || [include, exclude, files, baseOptions]), include = _b[0], exclude = _b[1], files = _b[2], baseOptions = _b[3];
-            }
-            else {
-                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1, "extends", "string"));
-            }
-            if (include && !json["include"]) {
-                json["include"] = include;
-            }
-            if (exclude && !json["exclude"]) {
-                json["exclude"] = exclude;
-            }
-            if (files && !json["files"]) {
-                json["files"] = files;
-            }
-            options = ts.assign({}, baseOptions, options);
-        }
-        options = ts.extend(existingOptions, options);
-        options.configFilePath = configFileName;
-        var _c = getFileNames(errors), fileNames = _c.fileNames, wildcardDirectories = _c.wildcardDirectories;
-        var compileOnSave = convertCompileOnSaveOptionFromJson(json, basePath, errors);
-        return {
-            options: options,
-            fileNames: fileNames,
-            typingOptions: typingOptions,
-            raw: json,
-            errors: errors,
-            wildcardDirectories: wildcardDirectories,
-            compileOnSave: compileOnSave
-        };
-        function tryExtendsName(extendedConfig) {
-            // If the path isn't a rooted or relative path, don't try to resolve it (we reserve the right to special case module-id like paths in the future)
-            if (!(ts.isRootedDiskPath(extendedConfig) || ts.startsWith(ts.normalizeSlashes(extendedConfig), "./") || ts.startsWith(ts.normalizeSlashes(extendedConfig), "../"))) {
-                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.The_path_in_an_extends_options_must_be_relative_or_rooted));
-                return;
-            }
-            var extendedConfigPath = ts.toPath(extendedConfig, basePath, getCanonicalFileName);
-            if (!host.fileExists(extendedConfigPath) && !ts.endsWith(extendedConfigPath, ".json")) {
-                extendedConfigPath = extendedConfigPath + ".json";
-                if (!host.fileExists(extendedConfigPath)) {
-                    errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.File_0_does_not_exist, extendedConfig));
-                    return;
-                }
-            }
-            var extendedResult = readConfigFile(extendedConfigPath, function (path) { return host.readFile(path); });
-            if (extendedResult.error) {
-                errors.push(extendedResult.error);
-                return;
-            }
-            var extendedDirname = ts.getDirectoryPath(extendedConfigPath);
-            var relativeDifference = ts.convertToRelativePath(extendedDirname, basePath, getCanonicalFileName);
-            var updatePath = function (path) { return ts.isRootedDiskPath(path) ? path : ts.combinePaths(relativeDifference, path); };
-            // Merge configs (copy the resolution stack so it is never reused between branches in potential diamond-problem scenarios)
-            var result = parseJsonConfigFileContent(extendedResult.config, host, extendedDirname, /*existingOptions*/ undefined, ts.getBaseFileName(extendedConfigPath), resolutionStack.concat([resolvedPath]));
-            errors.push.apply(errors, result.errors);
-            var _a = ts.map(["include", "exclude", "files"], function (key) {
-                if (!json[key] && extendedResult.config[key]) {
-                    return ts.map(extendedResult.config[key], updatePath);
-                }
-            }), include = _a[0], exclude = _a[1], files = _a[2];
-            return [include, exclude, files, result.options];
-        }
-        function getFileNames(errors) {
-            var fileNames;
-            if (ts.hasProperty(json, "files")) {
-                if (ts.isArray(json["files"])) {
-                    fileNames = json["files"];
-                }
-                else {
-                    errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1, "files", "Array"));
-                }
-            }
-            var includeSpecs;
-            if (ts.hasProperty(json, "include")) {
-                if (ts.isArray(json["include"])) {
-                    includeSpecs = json["include"];
-                }
-                else {
-                    errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1, "include", "Array"));
-                }
-            }
-            var excludeSpecs;
-            if (ts.hasProperty(json, "exclude")) {
-                if (ts.isArray(json["exclude"])) {
-                    excludeSpecs = json["exclude"];
-                }
-                else {
-                    errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1, "exclude", "Array"));
-                }
-            }
-            else if (ts.hasProperty(json, "excludes")) {
-                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unknown_option_excludes_Did_you_mean_exclude));
-            }
-            else {
-                // By default, exclude common package folders and the outDir
-                excludeSpecs = ["node_modules", "bower_components", "jspm_packages"];
-                var outDir = json["compilerOptions"] && json["compilerOptions"]["outDir"];
-                if (outDir) {
-                    excludeSpecs.push(outDir);
-                }
-            }
-            if (fileNames === undefined && includeSpecs === undefined) {
-                includeSpecs = ["**/*"];
-            }
-            return matchFileNames(fileNames, includeSpecs, excludeSpecs, basePath, options, host, errors);
-        }
-        var _b;
+    ts.updateModuleBlock = updateModuleBlock;
+    function createCaseBlock(clauses) {
+        var node = createSynthesizedNode(235 /* CaseBlock */);
+        node.clauses = createNodeArray(clauses);
+        return node;
     }
-    ts.parseJsonConfigFileContent = parseJsonConfigFileContent;
-    function convertCompileOnSaveOptionFromJson(jsonOption, basePath, errors) {
-        if (!ts.hasProperty(jsonOption, ts.compileOnSaveCommandLineOption.name)) {
-            return false;
-        }
-        var result = convertJsonOption(ts.compileOnSaveCommandLineOption, jsonOption["compileOnSave"], basePath, errors);
-        if (typeof result === "boolean" && result) {
-            return result;
-        }
-        return false;
+    ts.createCaseBlock = createCaseBlock;
+    function updateCaseBlock(node, clauses) {
+        return node.clauses !== clauses
+            ? updateNode(createCaseBlock(clauses), node)
+            : node;
     }
-    ts.convertCompileOnSaveOptionFromJson = convertCompileOnSaveOptionFromJson;
-    function convertCompilerOptionsFromJson(jsonOptions, basePath, configFileName) {
-        var errors = [];
-        var options = convertCompilerOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName);
-        return { options: options, errors: errors };
+    ts.updateCaseBlock = updateCaseBlock;
+    function createNamespaceExportDeclaration(name) {
+        var node = createSynthesizedNode(236 /* NamespaceExportDeclaration */);
+        node.name = asName(name);
+        return node;
     }
-    ts.convertCompilerOptionsFromJson = convertCompilerOptionsFromJson;
-    function convertTypingOptionsFromJson(jsonOptions, basePath, configFileName) {
-        var errors = [];
-        var options = convertTypingOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName);
-        return { options: options, errors: errors };
+    ts.createNamespaceExportDeclaration = createNamespaceExportDeclaration;
+    function updateNamespaceExportDeclaration(node, name) {
+        return node.name !== name
+            ? updateNode(createNamespaceExportDeclaration(name), node)
+            : node;
     }
-    ts.convertTypingOptionsFromJson = convertTypingOptionsFromJson;
-    function convertCompilerOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName) {
-        var options = ts.getBaseFileName(configFileName) === "jsconfig.json"
-            ? { allowJs: true, maxNodeModuleJsDepth: 2, allowSyntheticDefaultImports: true }
-            : {};
-        convertOptionsFromJson(ts.optionDeclarations, jsonOptions, basePath, options, ts.Diagnostics.Unknown_compiler_option_0, errors);
-        return options;
+    ts.updateNamespaceExportDeclaration = updateNamespaceExportDeclaration;
+    function createImportEqualsDeclaration(decorators, modifiers, name, moduleReference) {
+        var node = createSynthesizedNode(237 /* ImportEqualsDeclaration */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.name = asName(name);
+        node.moduleReference = moduleReference;
+        return node;
     }
-    function convertTypingOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName) {
-        var options = ts.getBaseFileName(configFileName) === "jsconfig.json"
-            ? { enableAutoDiscovery: true, include: [], exclude: [] }
-            : { enableAutoDiscovery: false, include: [], exclude: [] };
-        convertOptionsFromJson(ts.typingOptionDeclarations, jsonOptions, basePath, options, ts.Diagnostics.Unknown_typing_option_0, errors);
-        return options;
+    ts.createImportEqualsDeclaration = createImportEqualsDeclaration;
+    function updateImportEqualsDeclaration(node, decorators, modifiers, name, moduleReference) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.name !== name
+            || node.moduleReference !== moduleReference
+            ? updateNode(createImportEqualsDeclaration(decorators, modifiers, name, moduleReference), node)
+            : node;
     }
-    function convertOptionsFromJson(optionDeclarations, jsonOptions, basePath, defaultOptions, diagnosticMessage, errors) {
-        if (!jsonOptions) {
-            return;
-        }
-        var optionNameMap = ts.arrayToMap(optionDeclarations, function (opt) { return opt.name; });
-        for (var id in jsonOptions) {
-            if (id in optionNameMap) {
-                var opt = optionNameMap[id];
-                defaultOptions[opt.name] = convertJsonOption(opt, jsonOptions[id], basePath, errors);
-            }
-            else {
-                errors.push(ts.createCompilerDiagnostic(diagnosticMessage, id));
-            }
-        }
+    ts.updateImportEqualsDeclaration = updateImportEqualsDeclaration;
+    function createImportDeclaration(decorators, modifiers, importClause, moduleSpecifier) {
+        var node = createSynthesizedNode(238 /* ImportDeclaration */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.importClause = importClause;
+        node.moduleSpecifier = moduleSpecifier;
+        return node;
     }
-    function convertJsonOption(opt, value, basePath, errors) {
-        var optType = opt.type;
-        var expectedType = typeof optType === "string" ? optType : "string";
-        if (optType === "list" && ts.isArray(value)) {
-            return convertJsonOptionOfListType(opt, value, basePath, errors);
-        }
-        else if (typeof value === expectedType) {
-            if (typeof optType !== "string") {
-                return convertJsonOptionOfCustomType(opt, value, errors);
-            }
-            else {
-                if (opt.isFilePath) {
-                    value = ts.normalizePath(ts.combinePaths(basePath, value));
-                    if (value === "") {
-                        value = ".";
-                    }
-                }
-            }
-            return value;
-        }
-        else {
-            errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1, opt.name, expectedType));
-        }
+    ts.createImportDeclaration = createImportDeclaration;
+    function updateImportDeclaration(node, decorators, modifiers, importClause, moduleSpecifier) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.importClause !== importClause
+            || node.moduleSpecifier !== moduleSpecifier
+            ? updateNode(createImportDeclaration(decorators, modifiers, importClause, moduleSpecifier), node)
+            : node;
     }
-    function convertJsonOptionOfCustomType(opt, value, errors) {
-        var key = value.toLowerCase();
-        if (key in opt.type) {
-            return opt.type[key];
-        }
-        else {
-            errors.push(createCompilerDiagnosticForInvalidCustomType(opt));
-        }
+    ts.updateImportDeclaration = updateImportDeclaration;
+    function createImportClause(name, namedBindings) {
+        var node = createSynthesizedNode(239 /* ImportClause */);
+        node.name = name;
+        node.namedBindings = namedBindings;
+        return node;
     }
-    function convertJsonOptionOfListType(option, values, basePath, errors) {
-        return ts.filter(ts.map(values, function (v) { return convertJsonOption(option.element, v, basePath, errors); }), function (v) { return !!v; });
+    ts.createImportClause = createImportClause;
+    function updateImportClause(node, name, namedBindings) {
+        return node.name !== name
+            || node.namedBindings !== namedBindings
+            ? updateNode(createImportClause(name, namedBindings), node)
+            : node;
     }
-    function trimString(s) {
-        return typeof s.trim === "function" ? s.trim() : s.replace(/^[\s]+|[\s]+$/g, "");
+    ts.updateImportClause = updateImportClause;
+    function createNamespaceImport(name) {
+        var node = createSynthesizedNode(240 /* NamespaceImport */);
+        node.name = name;
+        return node;
     }
-    /**
-     * Tests for a path that ends in a recursive directory wildcard.
-     * Matches **, \**, **\, and \**\, but not a**b.
-     *
-     * NOTE: used \ in place of / above to avoid issues with multiline comments.
-     *
-     * Breakdown:
-     *  (^|\/)      # matches either the beginning of the string or a directory separator.
-     *  \*\*        # matches the recursive directory wildcard "**".
-     *  \/?$        # matches an optional trailing directory separator at the end of the string.
-     */
-    var invalidTrailingRecursionPattern = /(^|\/)\*\*\/?$/;
-    /**
-     * Tests for a path with multiple recursive directory wildcards.
-     * Matches **\** and **\a\**, but not **\a**b.
-     *
-     * NOTE: used \ in place of / above to avoid issues with multiline comments.
-     *
-     * Breakdown:
-     *  (^|\/)      # matches either the beginning of the string or a directory separator.
-     *  \*\*\/      # matches a recursive directory wildcard "**" followed by a directory separator.
-     *  (.*\/)?     # optionally matches any number of characters followed by a directory separator.
-     *  \*\*        # matches a recursive directory wildcard "**"
-     *  ($|\/)      # matches either the end of the string or a directory separator.
-     */
-    var invalidMultipleRecursionPatterns = /(^|\/)\*\*\/(.*\/)?\*\*($|\/)/;
-    /**
-     * Tests for a path where .. appears after a recursive directory wildcard.
-     * Matches **\..\*, **\a\..\*, and **\.., but not ..\**\*
-     *
-     * NOTE: used \ in place of / above to avoid issues with multiline comments.
-     *
-     * Breakdown:
-     *  (^|\/)      # matches either the beginning of the string or a directory separator.
-     *  \*\*\/      # matches a recursive directory wildcard "**" followed by a directory separator.
-     *  (.*\/)?     # optionally matches any number of characters followed by a directory separator.
-     *  \.\.        # matches a parent directory path component ".."
-     *  ($|\/)      # matches either the end of the string or a directory separator.
-     */
-    var invalidDotDotAfterRecursiveWildcardPattern = /(^|\/)\*\*\/(.*\/)?\.\.($|\/)/;
-    /**
-     * Tests for a path containing a wildcard character in a directory component of the path.
-     * Matches \*\, \?\, and \a*b\, but not \a\ or \a\*.
-     *
-     * NOTE: used \ in place of / above to avoid issues with multiline comments.
-     *
-     * Breakdown:
-     *  \/          # matches a directory separator.
-     *  [^/]*?      # matches any number of characters excluding directory separators (non-greedy).
-     *  [*?]        # matches either a wildcard character (* or ?)
-     *  [^/]*       # matches any number of characters excluding directory separators (greedy).
-     *  \/          # matches a directory separator.
-     */
-    var watchRecursivePattern = /\/[^/]*?[*?][^/]*\//;
-    /**
-     * Matches the portion of a wildcard path that does not contain wildcards.
-     * Matches \a of \a\*, or \a\b\c of \a\b\c\?\d.
-     *
-     * NOTE: used \ in place of / above to avoid issues with multiline comments.
-     *
-     * Breakdown:
-     *  ^                   # matches the beginning of the string
-     *  [^*?]*              # matches any number of non-wildcard characters
-     *  (?=\/[^/]*[*?])     # lookahead that matches a directory separator followed by
-     *                      # a path component that contains at least one wildcard character (* or ?).
-     */
-    var wildcardDirectoryPattern = /^[^*?]*(?=\/[^/]*[*?])/;
-    /**
-     * Expands an array of file specifications.
-     *
-     * @param fileNames The literal file names to include.
-     * @param include The wildcard file specifications to include.
-     * @param exclude The wildcard file specifications to exclude.
-     * @param basePath The base path for any relative file specifications.
-     * @param options Compiler options.
-     * @param host The host used to resolve files and directories.
-     * @param errors An array for diagnostic reporting.
-     */
-    function matchFileNames(fileNames, include, exclude, basePath, options, host, errors) {
-        basePath = ts.normalizePath(basePath);
-        // The exclude spec list is converted into a regular expression, which allows us to quickly
-        // test whether a file or directory should be excluded before recursively traversing the
-        // file system.
-        var keyMapper = host.useCaseSensitiveFileNames ? caseSensitiveKeyMapper : caseInsensitiveKeyMapper;
-        // Literal file names (provided via the "files" array in tsconfig.json) are stored in a
-        // file map with a possibly case insensitive key. We use this map later when when including
-        // wildcard paths.
-        var literalFileMap = ts.createMap();
-        // Wildcard paths (provided via the "includes" array in tsconfig.json) are stored in a
-        // file map with a possibly case insensitive key. We use this map to store paths matched
-        // via wildcard, and to handle extension priority.
-        var wildcardFileMap = ts.createMap();
-        if (include) {
-            include = validateSpecs(include, errors, /*allowTrailingRecursion*/ false);
-        }
-        if (exclude) {
-            exclude = validateSpecs(exclude, errors, /*allowTrailingRecursion*/ true);
-        }
-        // Wildcard directories (provided as part of a wildcard path) are stored in a
-        // file map that marks whether it was a regular wildcard match (with a `*` or `?` token),
-        // or a recursive directory. This information is used by filesystem watchers to monitor for
-        // new entries in these paths.
-        var wildcardDirectories = getWildcardDirectories(include, exclude, basePath, host.useCaseSensitiveFileNames);
-        // Rather than requery this for each file and filespec, we query the supported extensions
-        // once and store it on the expansion context.
-        var supportedExtensions = ts.getSupportedExtensions(options);
-        // Literal files are always included verbatim. An "include" or "exclude" specification cannot
-        // remove a literal file.
-        if (fileNames) {
-            for (var _i = 0, fileNames_1 = fileNames; _i < fileNames_1.length; _i++) {
-                var fileName = fileNames_1[_i];
-                var file = ts.combinePaths(basePath, fileName);
-                literalFileMap[keyMapper(file)] = file;
-            }
-        }
-        if (include && include.length > 0) {
-            for (var _a = 0, _b = host.readDirectory(basePath, supportedExtensions, exclude, include); _a < _b.length; _a++) {
-                var file = _b[_a];
-                // If we have already included a literal or wildcard path with a
-                // higher priority extension, we should skip this file.
-                //
-                // This handles cases where we may encounter both <file>.ts and
-                // <file>.d.ts (or <file>.js if "allowJs" is enabled) in the same
-                // directory when they are compilation outputs.
-                if (hasFileWithHigherPriorityExtension(file, literalFileMap, wildcardFileMap, supportedExtensions, keyMapper)) {
-                    continue;
-                }
-                // We may have included a wildcard path with a lower priority
-                // extension due to the user-defined order of entries in the
-                // "include" array. If there is a lower priority extension in the
-                // same directory, we should remove it.
-                removeWildcardFilesWithLowerPriorityExtension(file, wildcardFileMap, supportedExtensions, keyMapper);
-                var key = keyMapper(file);
-                if (!(key in literalFileMap) && !(key in wildcardFileMap)) {
-                    wildcardFileMap[key] = file;
-                }
-            }
-        }
-        var literalFiles = ts.reduceProperties(literalFileMap, addFileToOutput, []);
-        var wildcardFiles = ts.reduceProperties(wildcardFileMap, addFileToOutput, []);
-        wildcardFiles.sort(host.useCaseSensitiveFileNames ? ts.compareStrings : ts.compareStringsCaseInsensitive);
-        return {
-            fileNames: literalFiles.concat(wildcardFiles),
-            wildcardDirectories: wildcardDirectories
-        };
+    ts.createNamespaceImport = createNamespaceImport;
+    function updateNamespaceImport(node, name) {
+        return node.name !== name
+            ? updateNode(createNamespaceImport(name), node)
+            : node;
     }
-    function validateSpecs(specs, errors, allowTrailingRecursion) {
-        var validSpecs = [];
-        for (var _i = 0, specs_2 = specs; _i < specs_2.length; _i++) {
-            var spec = specs_2[_i];
-            if (!allowTrailingRecursion && invalidTrailingRecursionPattern.test(spec)) {
-                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.File_specification_cannot_end_in_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0, spec));
-            }
-            else if (invalidMultipleRecursionPatterns.test(spec)) {
-                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.File_specification_cannot_contain_multiple_recursive_directory_wildcards_Asterisk_Asterisk_Colon_0, spec));
-            }
-            else if (invalidDotDotAfterRecursiveWildcardPattern.test(spec)) {
-                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.File_specification_cannot_contain_a_parent_directory_that_appears_after_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0, spec));
-            }
-            else {
-                validSpecs.push(spec);
-            }
-        }
-        return validSpecs;
+    ts.updateNamespaceImport = updateNamespaceImport;
+    function createNamedImports(elements) {
+        var node = createSynthesizedNode(241 /* NamedImports */);
+        node.elements = createNodeArray(elements);
+        return node;
     }
-    /**
-     * Gets directories in a set of include patterns that should be watched for changes.
-     */
-    function getWildcardDirectories(include, exclude, path, useCaseSensitiveFileNames) {
-        // We watch a directory recursively if it contains a wildcard anywhere in a directory segment
-        // of the pattern:
-        //
-        //  /a/b/**/d   - Watch /a/b recursively to catch changes to any d in any subfolder recursively
-        //  /a/b/*/d    - Watch /a/b recursively to catch any d in any immediate subfolder, even if a new subfolder is added
-        //
-        // We watch a directory without recursion if it contains a wildcard in the file segment of
-        // the pattern:
-        //
-        //  /a/b/*      - Watch /a/b directly to catch any new file
-        //  /a/b/a?z    - Watch /a/b directly to catch any new file matching a?z
-        var rawExcludeRegex = ts.getRegularExpressionForWildcard(exclude, path, "exclude");
-        var excludeRegex = rawExcludeRegex && new RegExp(rawExcludeRegex, useCaseSensitiveFileNames ? "" : "i");
-        var wildcardDirectories = ts.createMap();
-        if (include !== undefined) {
-            var recursiveKeys = [];
-            for (var _i = 0, include_1 = include; _i < include_1.length; _i++) {
-                var file = include_1[_i];
-                var name_27 = ts.normalizePath(ts.combinePaths(path, file));
-                if (excludeRegex && excludeRegex.test(name_27)) {
-                    continue;
-                }
-                var match = wildcardDirectoryPattern.exec(name_27);
-                if (match) {
-                    var key = useCaseSensitiveFileNames ? match[0] : match[0].toLowerCase();
-                    var flags = watchRecursivePattern.test(name_27) ? 1 /* Recursive */ : 0 /* None */;
-                    var existingFlags = wildcardDirectories[key];
-                    if (existingFlags === undefined || existingFlags < flags) {
-                        wildcardDirectories[key] = flags;
-                        if (flags === 1 /* Recursive */) {
-                            recursiveKeys.push(key);
-                        }
-                    }
-                }
-            }
-            // Remove any subpaths under an existing recursively watched directory.
-            for (var key in wildcardDirectories) {
-                for (var _a = 0, recursiveKeys_1 = recursiveKeys; _a < recursiveKeys_1.length; _a++) {
-                    var recursiveKey = recursiveKeys_1[_a];
-                    if (key !== recursiveKey && ts.containsPath(recursiveKey, key, path, !useCaseSensitiveFileNames)) {
-                        delete wildcardDirectories[key];
-                    }
-                }
-            }
-        }
-        return wildcardDirectories;
+    ts.createNamedImports = createNamedImports;
+    function updateNamedImports(node, elements) {
+        return node.elements !== elements
+            ? updateNode(createNamedImports(elements), node)
+            : node;
+    }
+    ts.updateNamedImports = updateNamedImports;
+    function createImportSpecifier(propertyName, name) {
+        var node = createSynthesizedNode(242 /* ImportSpecifier */);
+        node.propertyName = propertyName;
+        node.name = name;
+        return node;
+    }
+    ts.createImportSpecifier = createImportSpecifier;
+    function updateImportSpecifier(node, propertyName, name) {
+        return node.propertyName !== propertyName
+            || node.name !== name
+            ? updateNode(createImportSpecifier(propertyName, name), node)
+            : node;
+    }
+    ts.updateImportSpecifier = updateImportSpecifier;
+    function createExportAssignment(decorators, modifiers, isExportEquals, expression) {
+        var node = createSynthesizedNode(243 /* ExportAssignment */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.isExportEquals = isExportEquals;
+        node.expression = expression;
+        return node;
+    }
+    ts.createExportAssignment = createExportAssignment;
+    function updateExportAssignment(node, decorators, modifiers, expression) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.expression !== expression
+            ? updateNode(createExportAssignment(decorators, modifiers, node.isExportEquals, expression), node)
+            : node;
+    }
+    ts.updateExportAssignment = updateExportAssignment;
+    function createExportDeclaration(decorators, modifiers, exportClause, moduleSpecifier) {
+        var node = createSynthesizedNode(244 /* ExportDeclaration */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.exportClause = exportClause;
+        node.moduleSpecifier = moduleSpecifier;
+        return node;
+    }
+    ts.createExportDeclaration = createExportDeclaration;
+    function updateExportDeclaration(node, decorators, modifiers, exportClause, moduleSpecifier) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.exportClause !== exportClause
+            || node.moduleSpecifier !== moduleSpecifier
+            ? updateNode(createExportDeclaration(decorators, modifiers, exportClause, moduleSpecifier), node)
+            : node;
+    }
+    ts.updateExportDeclaration = updateExportDeclaration;
+    function createNamedExports(elements) {
+        var node = createSynthesizedNode(245 /* NamedExports */);
+        node.elements = createNodeArray(elements);
+        return node;
+    }
+    ts.createNamedExports = createNamedExports;
+    function updateNamedExports(node, elements) {
+        return node.elements !== elements
+            ? updateNode(createNamedExports(elements), node)
+            : node;
+    }
+    ts.updateNamedExports = updateNamedExports;
+    function createExportSpecifier(propertyName, name) {
+        var node = createSynthesizedNode(246 /* ExportSpecifier */);
+        node.propertyName = asName(propertyName);
+        node.name = asName(name);
+        return node;
+    }
+    ts.createExportSpecifier = createExportSpecifier;
+    function updateExportSpecifier(node, propertyName, name) {
+        return node.propertyName !== propertyName
+            || node.name !== name
+            ? updateNode(createExportSpecifier(propertyName, name), node)
+            : node;
+    }
+    ts.updateExportSpecifier = updateExportSpecifier;
+    // Module references
+    function createExternalModuleReference(expression) {
+        var node = createSynthesizedNode(248 /* ExternalModuleReference */);
+        node.expression = expression;
+        return node;
+    }
+    ts.createExternalModuleReference = createExternalModuleReference;
+    function updateExternalModuleReference(node, expression) {
+        return node.expression !== expression
+            ? updateNode(createExternalModuleReference(expression), node)
+            : node;
+    }
+    ts.updateExternalModuleReference = updateExternalModuleReference;
+    // JSX
+    function createJsxElement(openingElement, children, closingElement) {
+        var node = createSynthesizedNode(249 /* JsxElement */);
+        node.openingElement = openingElement;
+        node.children = createNodeArray(children);
+        node.closingElement = closingElement;
+        return node;
+    }
+    ts.createJsxElement = createJsxElement;
+    function updateJsxElement(node, openingElement, children, closingElement) {
+        return node.openingElement !== openingElement
+            || node.children !== children
+            || node.closingElement !== closingElement
+            ? updateNode(createJsxElement(openingElement, children, closingElement), node)
+            : node;
+    }
+    ts.updateJsxElement = updateJsxElement;
+    function createJsxSelfClosingElement(tagName, attributes) {
+        var node = createSynthesizedNode(250 /* JsxSelfClosingElement */);
+        node.tagName = tagName;
+        node.attributes = attributes;
+        return node;
+    }
+    ts.createJsxSelfClosingElement = createJsxSelfClosingElement;
+    function updateJsxSelfClosingElement(node, tagName, attributes) {
+        return node.tagName !== tagName
+            || node.attributes !== attributes
+            ? updateNode(createJsxSelfClosingElement(tagName, attributes), node)
+            : node;
+    }
+    ts.updateJsxSelfClosingElement = updateJsxSelfClosingElement;
+    function createJsxOpeningElement(tagName, attributes) {
+        var node = createSynthesizedNode(251 /* JsxOpeningElement */);
+        node.tagName = tagName;
+        node.attributes = attributes;
+        return node;
+    }
+    ts.createJsxOpeningElement = createJsxOpeningElement;
+    function updateJsxOpeningElement(node, tagName, attributes) {
+        return node.tagName !== tagName
+            || node.attributes !== attributes
+            ? updateNode(createJsxOpeningElement(tagName, attributes), node)
+            : node;
+    }
+    ts.updateJsxOpeningElement = updateJsxOpeningElement;
+    function createJsxClosingElement(tagName) {
+        var node = createSynthesizedNode(252 /* JsxClosingElement */);
+        node.tagName = tagName;
+        return node;
+    }
+    ts.createJsxClosingElement = createJsxClosingElement;
+    function updateJsxClosingElement(node, tagName) {
+        return node.tagName !== tagName
+            ? updateNode(createJsxClosingElement(tagName), node)
+            : node;
     }
-    /**
-     * Determines whether a literal or wildcard file has already been included that has a higher
-     * extension priority.
-     *
-     * @param file The path to the file.
-     * @param extensionPriority The priority of the extension.
-     * @param context The expansion context.
-     */
-    function hasFileWithHigherPriorityExtension(file, literalFiles, wildcardFiles, extensions, keyMapper) {
-        var extensionPriority = ts.getExtensionPriority(file, extensions);
-        var adjustedExtensionPriority = ts.adjustExtensionPriority(extensionPriority);
-        for (var i = 0 /* Highest */; i < adjustedExtensionPriority; i++) {
-            var higherPriorityExtension = extensions[i];
-            var higherPriorityPath = keyMapper(ts.changeExtension(file, higherPriorityExtension));
-            if (higherPriorityPath in literalFiles || higherPriorityPath in wildcardFiles) {
-                return true;
-            }
-        }
-        return false;
+    ts.updateJsxClosingElement = updateJsxClosingElement;
+    function createJsxAttribute(name, initializer) {
+        var node = createSynthesizedNode(253 /* JsxAttribute */);
+        node.name = name;
+        node.initializer = initializer;
+        return node;
     }
-    /**
-     * Removes files included via wildcard expansion with a lower extension priority that have
-     * already been included.
-     *
-     * @param file The path to the file.
-     * @param extensionPriority The priority of the extension.
-     * @param context The expansion context.
-     */
-    function removeWildcardFilesWithLowerPriorityExtension(file, wildcardFiles, extensions, keyMapper) {
-        var extensionPriority = ts.getExtensionPriority(file, extensions);
-        var nextExtensionPriority = ts.getNextLowestExtensionPriority(extensionPriority);
-        for (var i = nextExtensionPriority; i < extensions.length; i++) {
-            var lowerPriorityExtension = extensions[i];
-            var lowerPriorityPath = keyMapper(ts.changeExtension(file, lowerPriorityExtension));
-            delete wildcardFiles[lowerPriorityPath];
-        }
+    ts.createJsxAttribute = createJsxAttribute;
+    function updateJsxAttribute(node, name, initializer) {
+        return node.name !== name
+            || node.initializer !== initializer
+            ? updateNode(createJsxAttribute(name, initializer), node)
+            : node;
     }
-    /**
-     * Adds a file to an array of files.
-     *
-     * @param output The output array.
-     * @param file The file path.
-     */
-    function addFileToOutput(output, file) {
-        output.push(file);
-        return output;
+    ts.updateJsxAttribute = updateJsxAttribute;
+    function createJsxAttributes(properties) {
+        var node = createSynthesizedNode(254 /* JsxAttributes */);
+        node.properties = createNodeArray(properties);
+        return node;
     }
-    /**
-     * Gets a case sensitive key.
-     *
-     * @param key The original key.
-     */
-    function caseSensitiveKeyMapper(key) {
-        return key;
+    ts.createJsxAttributes = createJsxAttributes;
+    function updateJsxAttributes(node, properties) {
+        return node.properties !== properties
+            ? updateNode(createJsxAttributes(properties), node)
+            : node;
     }
-    /**
-     * Gets a case insensitive key.
-     *
-     * @param key The original key.
-     */
-    function caseInsensitiveKeyMapper(key) {
-        return key.toLowerCase();
+    ts.updateJsxAttributes = updateJsxAttributes;
+    function createJsxSpreadAttribute(expression) {
+        var node = createSynthesizedNode(255 /* JsxSpreadAttribute */);
+        node.expression = expression;
+        return node;
     }
-})(ts || (ts = {}));
-/// <reference path="checker.ts"/>
-/* @internal */
-var ts;
-(function (ts) {
-    function getDeclarationDiagnostics(host, resolver, targetSourceFile) {
-        var declarationDiagnostics = ts.createDiagnosticCollection();
-        ts.forEachExpectedEmitFile(host, getDeclarationDiagnosticsFromFile, targetSourceFile);
-        return declarationDiagnostics.getDiagnostics(targetSourceFile ? targetSourceFile.fileName : undefined);
-        function getDeclarationDiagnosticsFromFile(_a, sources, isBundledEmit) {
-            var declarationFilePath = _a.declarationFilePath;
-            emitDeclarations(host, resolver, declarationDiagnostics, declarationFilePath, sources, isBundledEmit, /*emitOnlyDtsFiles*/ false);
-        }
+    ts.createJsxSpreadAttribute = createJsxSpreadAttribute;
+    function updateJsxSpreadAttribute(node, expression) {
+        return node.expression !== expression
+            ? updateNode(createJsxSpreadAttribute(expression), node)
+            : node;
     }
-    ts.getDeclarationDiagnostics = getDeclarationDiagnostics;
-    function emitDeclarations(host, resolver, emitterDiagnostics, declarationFilePath, sourceFiles, isBundledEmit, emitOnlyDtsFiles) {
-        var newLine = host.getNewLine();
-        var compilerOptions = host.getCompilerOptions();
-        var write;
-        var writeLine;
-        var increaseIndent;
-        var decreaseIndent;
-        var writeTextOfNode;
-        var writer;
-        createAndSetNewTextWriterWithSymbolWriter();
-        var enclosingDeclaration;
-        var resultHasExternalModuleIndicator;
-        var currentText;
-        var currentLineMap;
-        var currentIdentifiers;
-        var isCurrentFileExternalModule;
-        var reportedDeclarationError = false;
-        var errorNameNode;
-        var emitJsDocComments = compilerOptions.removeComments ? function (declaration) { } : writeJsDocComments;
-        var emit = compilerOptions.stripInternal ? stripInternal : emitNode;
-        var noDeclare;
-        var moduleElementDeclarationEmitInfo = [];
-        var asynchronousSubModuleDeclarationEmitInfo;
-        // Contains the reference paths that needs to go in the declaration file.
-        // Collecting this separately because reference paths need to be first thing in the declaration file
-        // and we could be collecting these paths from multiple files into single one with --out option
-        var referencesOutput = "";
-        var usedTypeDirectiveReferences;
-        // Emit references corresponding to each file
-        var emittedReferencedFiles = [];
-        var addedGlobalFileReference = false;
-        var allSourcesModuleElementDeclarationEmitInfo = [];
-        ts.forEach(sourceFiles, function (sourceFile) {
-            // Dont emit for javascript file
-            if (ts.isSourceFileJavaScript(sourceFile)) {
-                return;
-            }
-            // Check what references need to be added
-            if (!compilerOptions.noResolve) {
-                ts.forEach(sourceFile.referencedFiles, function (fileReference) {
-                    var referencedFile = ts.tryResolveScriptReference(host, sourceFile, fileReference);
-                    // Emit reference in dts, if the file reference was not already emitted
-                    if (referencedFile && !ts.contains(emittedReferencedFiles, referencedFile)) {
-                        // Add a reference to generated dts file,
-                        // global file reference is added only
-                        //  - if it is not bundled emit (because otherwise it would be self reference)
-                        //  - and it is not already added
-                        if (writeReferencePath(referencedFile, !isBundledEmit && !addedGlobalFileReference, emitOnlyDtsFiles)) {
-                            addedGlobalFileReference = true;
-                        }
-                        emittedReferencedFiles.push(referencedFile);
-                    }
-                });
-            }
-            resultHasExternalModuleIndicator = false;
-            if (!isBundledEmit || !ts.isExternalModule(sourceFile)) {
-                noDeclare = false;
-                emitSourceFile(sourceFile);
-            }
-            else if (ts.isExternalModule(sourceFile)) {
-                noDeclare = true;
-                write("declare module \"" + ts.getResolvedExternalModuleName(host, sourceFile) + "\" {");
-                writeLine();
-                increaseIndent();
-                emitSourceFile(sourceFile);
-                decreaseIndent();
-                write("}");
-                writeLine();
-            }
-            // create asynchronous output for the importDeclarations
-            if (moduleElementDeclarationEmitInfo.length) {
-                var oldWriter = writer;
-                ts.forEach(moduleElementDeclarationEmitInfo, function (aliasEmitInfo) {
-                    if (aliasEmitInfo.isVisible && !aliasEmitInfo.asynchronousOutput) {
-                        ts.Debug.assert(aliasEmitInfo.node.kind === 230 /* ImportDeclaration */);
-                        createAndSetNewTextWriterWithSymbolWriter();
-                        ts.Debug.assert(aliasEmitInfo.indent === 0 || (aliasEmitInfo.indent === 1 && isBundledEmit));
-                        for (var i = 0; i < aliasEmitInfo.indent; i++) {
-                            increaseIndent();
-                        }
-                        writeImportDeclaration(aliasEmitInfo.node);
-                        aliasEmitInfo.asynchronousOutput = writer.getText();
-                        for (var i = 0; i < aliasEmitInfo.indent; i++) {
-                            decreaseIndent();
-                        }
-                    }
-                });
-                setWriter(oldWriter);
-                allSourcesModuleElementDeclarationEmitInfo = allSourcesModuleElementDeclarationEmitInfo.concat(moduleElementDeclarationEmitInfo);
-                moduleElementDeclarationEmitInfo = [];
-            }
-            if (!isBundledEmit && ts.isExternalModule(sourceFile) && sourceFile.moduleAugmentations.length && !resultHasExternalModuleIndicator) {
-                // if file was external module with augmentations - this fact should be preserved in .d.ts as well.
-                // in case if we didn't write any external module specifiers in .d.ts we need to emit something
-                // that will force compiler to think that this file is an external module - 'export {}' is a reasonable choice here.
-                write("export {};");
-                writeLine();
-            }
-        });
-        if (usedTypeDirectiveReferences) {
-            for (var directive in usedTypeDirectiveReferences) {
-                referencesOutput += "/// <reference types=\"" + directive + "\" />" + newLine;
-            }
-        }
-        return {
-            reportedDeclarationError: reportedDeclarationError,
-            moduleElementDeclarationEmitInfo: allSourcesModuleElementDeclarationEmitInfo,
-            synchronousDeclarationOutput: writer.getText(),
-            referencesOutput: referencesOutput,
-        };
-        function hasInternalAnnotation(range) {
-            var comment = currentText.substring(range.pos, range.end);
-            return comment.indexOf("@internal") >= 0;
-        }
-        function stripInternal(node) {
-            if (node) {
-                var leadingCommentRanges = ts.getLeadingCommentRanges(currentText, node.pos);
-                if (ts.forEach(leadingCommentRanges, hasInternalAnnotation)) {
-                    return;
-                }
-                emitNode(node);
-            }
-        }
-        function createAndSetNewTextWriterWithSymbolWriter() {
-            var writer = ts.createTextWriter(newLine);
-            writer.trackSymbol = trackSymbol;
-            writer.reportInaccessibleThisError = reportInaccessibleThisError;
-            writer.writeKeyword = writer.write;
-            writer.writeOperator = writer.write;
-            writer.writePunctuation = writer.write;
-            writer.writeSpace = writer.write;
-            writer.writeStringLiteral = writer.writeLiteral;
-            writer.writeParameter = writer.write;
-            writer.writeSymbol = writer.write;
-            setWriter(writer);
-        }
-        function setWriter(newWriter) {
-            writer = newWriter;
-            write = newWriter.write;
-            writeTextOfNode = newWriter.writeTextOfNode;
-            writeLine = newWriter.writeLine;
-            increaseIndent = newWriter.increaseIndent;
-            decreaseIndent = newWriter.decreaseIndent;
-        }
-        function writeAsynchronousModuleElements(nodes) {
-            var oldWriter = writer;
-            ts.forEach(nodes, function (declaration) {
-                var nodeToCheck;
-                if (declaration.kind === 218 /* VariableDeclaration */) {
-                    nodeToCheck = declaration.parent.parent;
-                }
-                else if (declaration.kind === 233 /* NamedImports */ || declaration.kind === 234 /* ImportSpecifier */ || declaration.kind === 231 /* ImportClause */) {
-                    ts.Debug.fail("We should be getting ImportDeclaration instead to write");
-                }
-                else {
-                    nodeToCheck = declaration;
-                }
-                var moduleElementEmitInfo = ts.forEach(moduleElementDeclarationEmitInfo, function (declEmitInfo) { return declEmitInfo.node === nodeToCheck ? declEmitInfo : undefined; });
-                if (!moduleElementEmitInfo && asynchronousSubModuleDeclarationEmitInfo) {
-                    moduleElementEmitInfo = ts.forEach(asynchronousSubModuleDeclarationEmitInfo, function (declEmitInfo) { return declEmitInfo.node === nodeToCheck ? declEmitInfo : undefined; });
-                }
-                // If the alias was marked as not visible when we saw its declaration, we would have saved the aliasEmitInfo, but if we haven't yet visited the alias declaration
-                // then we don't need to write it at this point. We will write it when we actually see its declaration
-                // Eg.
-                // export function bar(a: foo.Foo) { }
-                // import foo = require("foo");
-                // Writing of function bar would mark alias declaration foo as visible but we haven't yet visited that declaration so do nothing,
-                // we would write alias foo declaration when we visit it since it would now be marked as visible
-                if (moduleElementEmitInfo) {
-                    if (moduleElementEmitInfo.node.kind === 230 /* ImportDeclaration */) {
-                        // we have to create asynchronous output only after we have collected complete information
-                        // because it is possible to enable multiple bindings as asynchronously visible
-                        moduleElementEmitInfo.isVisible = true;
-                    }
-                    else {
-                        createAndSetNewTextWriterWithSymbolWriter();
-                        for (var declarationIndent = moduleElementEmitInfo.indent; declarationIndent; declarationIndent--) {
-                            increaseIndent();
-                        }
-                        if (nodeToCheck.kind === 225 /* ModuleDeclaration */) {
-                            ts.Debug.assert(asynchronousSubModuleDeclarationEmitInfo === undefined);
-                            asynchronousSubModuleDeclarationEmitInfo = [];
-                        }
-                        writeModuleElement(nodeToCheck);
-                        if (nodeToCheck.kind === 225 /* ModuleDeclaration */) {
-                            moduleElementEmitInfo.subModuleElementDeclarationEmitInfo = asynchronousSubModuleDeclarationEmitInfo;
-                            asynchronousSubModuleDeclarationEmitInfo = undefined;
-                        }
-                        moduleElementEmitInfo.asynchronousOutput = writer.getText();
-                    }
-                }
-            });
-            setWriter(oldWriter);
-        }
-        function recordTypeReferenceDirectivesIfNecessary(typeReferenceDirectives) {
-            if (!typeReferenceDirectives) {
-                return;
-            }
-            if (!usedTypeDirectiveReferences) {
-                usedTypeDirectiveReferences = ts.createMap();
-            }
-            for (var _i = 0, typeReferenceDirectives_1 = typeReferenceDirectives; _i < typeReferenceDirectives_1.length; _i++) {
-                var directive = typeReferenceDirectives_1[_i];
-                if (!(directive in usedTypeDirectiveReferences)) {
-                    usedTypeDirectiveReferences[directive] = directive;
-                }
-            }
-        }
-        function handleSymbolAccessibilityError(symbolAccessibilityResult) {
-            if (symbolAccessibilityResult.accessibility === 0 /* Accessible */) {
-                // write the aliases
-                if (symbolAccessibilityResult && symbolAccessibilityResult.aliasesToMakeVisible) {
-                    writeAsynchronousModuleElements(symbolAccessibilityResult.aliasesToMakeVisible);
-                }
-            }
-            else {
-                // Report error
-                reportedDeclarationError = true;
-                var errorInfo = writer.getSymbolAccessibilityDiagnostic(symbolAccessibilityResult);
-                if (errorInfo) {
-                    if (errorInfo.typeName) {
-                        emitterDiagnostics.add(ts.createDiagnosticForNode(symbolAccessibilityResult.errorNode || errorInfo.errorNode, errorInfo.diagnosticMessage, ts.getTextOfNodeFromSourceText(currentText, errorInfo.typeName), symbolAccessibilityResult.errorSymbolName, symbolAccessibilityResult.errorModuleName));
-                    }
-                    else {
-                        emitterDiagnostics.add(ts.createDiagnosticForNode(symbolAccessibilityResult.errorNode || errorInfo.errorNode, errorInfo.diagnosticMessage, symbolAccessibilityResult.errorSymbolName, symbolAccessibilityResult.errorModuleName));
-                    }
-                }
-            }
-        }
-        function trackSymbol(symbol, enclosingDeclaration, meaning) {
-            handleSymbolAccessibilityError(resolver.isSymbolAccessible(symbol, enclosingDeclaration, meaning, /*shouldComputeAliasesToMakeVisible*/ true));
-            recordTypeReferenceDirectivesIfNecessary(resolver.getTypeReferenceDirectivesForSymbol(symbol, meaning));
-        }
-        function reportInaccessibleThisError() {
-            if (errorNameNode) {
-                reportedDeclarationError = true;
-                emitterDiagnostics.add(ts.createDiagnosticForNode(errorNameNode, ts.Diagnostics.The_inferred_type_of_0_references_an_inaccessible_this_type_A_type_annotation_is_necessary, ts.declarationNameToString(errorNameNode)));
-            }
-        }
-        function writeTypeOfDeclaration(declaration, type, getSymbolAccessibilityDiagnostic) {
-            writer.getSymbolAccessibilityDiagnostic = getSymbolAccessibilityDiagnostic;
-            write(": ");
-            if (type) {
-                // Write the type
-                emitType(type);
-            }
-            else {
-                errorNameNode = declaration.name;
-                resolver.writeTypeOfDeclaration(declaration, enclosingDeclaration, 2 /* UseTypeOfFunction */ | 1024 /* UseTypeAliasValue */, writer);
-                errorNameNode = undefined;
-            }
-        }
-        function writeReturnTypeAtSignature(signature, getSymbolAccessibilityDiagnostic) {
-            writer.getSymbolAccessibilityDiagnostic = getSymbolAccessibilityDiagnostic;
-            write(": ");
-            if (signature.type) {
-                // Write the type
-                emitType(signature.type);
-            }
-            else {
-                errorNameNode = signature.name;
-                resolver.writeReturnTypeOfSignatureDeclaration(signature, enclosingDeclaration, 2 /* UseTypeOfFunction */ | 1024 /* UseTypeAliasValue */, writer);
-                errorNameNode = undefined;
-            }
-        }
-        function emitLines(nodes) {
-            for (var _i = 0, nodes_2 = nodes; _i < nodes_2.length; _i++) {
-                var node = nodes_2[_i];
-                emit(node);
-            }
-        }
-        function emitSeparatedList(nodes, separator, eachNodeEmitFn, canEmitFn) {
-            var currentWriterPos = writer.getTextPos();
-            for (var _i = 0, nodes_3 = nodes; _i < nodes_3.length; _i++) {
-                var node = nodes_3[_i];
-                if (!canEmitFn || canEmitFn(node)) {
-                    if (currentWriterPos !== writer.getTextPos()) {
-                        write(separator);
-                    }
-                    currentWriterPos = writer.getTextPos();
-                    eachNodeEmitFn(node);
-                }
-            }
-        }
-        function emitCommaList(nodes, eachNodeEmitFn, canEmitFn) {
-            emitSeparatedList(nodes, ", ", eachNodeEmitFn, canEmitFn);
-        }
-        function writeJsDocComments(declaration) {
-            if (declaration) {
-                var jsDocComments = ts.getJsDocCommentsFromText(declaration, currentText);
-                ts.emitNewLineBeforeLeadingComments(currentLineMap, writer, declaration, jsDocComments);
-                // jsDoc comments are emitted at /*leading comment1 */space/*leading comment*/space
-                ts.emitComments(currentText, currentLineMap, writer, jsDocComments, /*leadingSeparator*/ false, /*trailingSeparator*/ true, newLine, ts.writeCommentRange);
-            }
-        }
-        function emitTypeWithNewGetSymbolAccessibilityDiagnostic(type, getSymbolAccessibilityDiagnostic) {
-            writer.getSymbolAccessibilityDiagnostic = getSymbolAccessibilityDiagnostic;
-            emitType(type);
-        }
-        function emitType(type) {
-            switch (type.kind) {
-                case 117 /* AnyKeyword */:
-                case 132 /* StringKeyword */:
-                case 130 /* NumberKeyword */:
-                case 120 /* BooleanKeyword */:
-                case 133 /* SymbolKeyword */:
-                case 103 /* VoidKeyword */:
-                case 135 /* UndefinedKeyword */:
-                case 93 /* NullKeyword */:
-                case 127 /* NeverKeyword */:
-                case 165 /* ThisType */:
-                case 166 /* LiteralType */:
-                    return writeTextOfNode(currentText, type);
-                case 194 /* ExpressionWithTypeArguments */:
-                    return emitExpressionWithTypeArguments(type);
-                case 155 /* TypeReference */:
-                    return emitTypeReference(type);
-                case 158 /* TypeQuery */:
-                    return emitTypeQuery(type);
-                case 160 /* ArrayType */:
-                    return emitArrayType(type);
-                case 161 /* TupleType */:
-                    return emitTupleType(type);
-                case 162 /* UnionType */:
-                    return emitUnionType(type);
-                case 163 /* IntersectionType */:
-                    return emitIntersectionType(type);
-                case 164 /* ParenthesizedType */:
-                    return emitParenType(type);
-                case 156 /* FunctionType */:
-                case 157 /* ConstructorType */:
-                    return emitSignatureDeclarationWithJsDocComments(type);
-                case 159 /* TypeLiteral */:
-                    return emitTypeLiteral(type);
-                case 69 /* Identifier */:
-                    return emitEntityName(type);
-                case 139 /* QualifiedName */:
-                    return emitEntityName(type);
-                case 154 /* TypePredicate */:
-                    return emitTypePredicate(type);
-            }
-            function writeEntityName(entityName) {
-                if (entityName.kind === 69 /* Identifier */) {
-                    writeTextOfNode(currentText, entityName);
-                }
-                else {
-                    var left = entityName.kind === 139 /* QualifiedName */ ? entityName.left : entityName.expression;
-                    var right = entityName.kind === 139 /* QualifiedName */ ? entityName.right : entityName.name;
-                    writeEntityName(left);
-                    write(".");
-                    writeTextOfNode(currentText, right);
-                }
-            }
-            function emitEntityName(entityName) {
-                var visibilityResult = resolver.isEntityNameVisible(entityName, 
-                // Aliases can be written asynchronously so use correct enclosing declaration
-                entityName.parent.kind === 229 /* ImportEqualsDeclaration */ ? entityName.parent : enclosingDeclaration);
-                handleSymbolAccessibilityError(visibilityResult);
-                recordTypeReferenceDirectivesIfNecessary(resolver.getTypeReferenceDirectivesForEntityName(entityName));
-                writeEntityName(entityName);
-            }
-            function emitExpressionWithTypeArguments(node) {
-                if (ts.isEntityNameExpression(node.expression)) {
-                    ts.Debug.assert(node.expression.kind === 69 /* Identifier */ || node.expression.kind === 172 /* PropertyAccessExpression */);
-                    emitEntityName(node.expression);
-                    if (node.typeArguments) {
-                        write("<");
-                        emitCommaList(node.typeArguments, emitType);
-                        write(">");
-                    }
-                }
-            }
-            function emitTypeReference(type) {
-                emitEntityName(type.typeName);
-                if (type.typeArguments) {
-                    write("<");
-                    emitCommaList(type.typeArguments, emitType);
-                    write(">");
-                }
-            }
-            function emitTypePredicate(type) {
-                writeTextOfNode(currentText, type.parameterName);
-                write(" is ");
-                emitType(type.type);
-            }
-            function emitTypeQuery(type) {
-                write("typeof ");
-                emitEntityName(type.exprName);
-            }
-            function emitArrayType(type) {
-                emitType(type.elementType);
-                write("[]");
-            }
-            function emitTupleType(type) {
-                write("[");
-                emitCommaList(type.elementTypes, emitType);
-                write("]");
-            }
-            function emitUnionType(type) {
-                emitSeparatedList(type.types, " | ", emitType);
-            }
-            function emitIntersectionType(type) {
-                emitSeparatedList(type.types, " & ", emitType);
-            }
-            function emitParenType(type) {
-                write("(");
-                emitType(type.type);
-                write(")");
-            }
-            function emitTypeLiteral(type) {
-                write("{");
-                if (type.members.length) {
-                    writeLine();
-                    increaseIndent();
-                    // write members
-                    emitLines(type.members);
-                    decreaseIndent();
-                }
-                write("}");
-            }
-        }
-        function emitSourceFile(node) {
-            currentText = node.text;
-            currentLineMap = ts.getLineStarts(node);
-            currentIdentifiers = node.identifiers;
-            isCurrentFileExternalModule = ts.isExternalModule(node);
-            enclosingDeclaration = node;
-            ts.emitDetachedComments(currentText, currentLineMap, writer, ts.writeCommentRange, node, newLine, true /* remove comments */);
-            emitLines(node.statements);
-        }
-        // Return a temp variable name to be used in `export default` statements.
-        // The temp name will be of the form _default_counter.
-        // Note that export default is only allowed at most once in a module, so we
-        // do not need to keep track of created temp names.
-        function getExportDefaultTempVariableName() {
-            var baseName = "_default";
-            if (!(baseName in currentIdentifiers)) {
-                return baseName;
-            }
-            var count = 0;
-            while (true) {
-                count++;
-                var name_28 = baseName + "_" + count;
-                if (!(name_28 in currentIdentifiers)) {
-                    return name_28;
-                }
-            }
-        }
-        function emitExportAssignment(node) {
-            if (node.expression.kind === 69 /* Identifier */) {
-                write(node.isExportEquals ? "export = " : "export default ");
-                writeTextOfNode(currentText, node.expression);
-            }
-            else {
-                // Expression
-                var tempVarName = getExportDefaultTempVariableName();
-                if (!noDeclare) {
-                    write("declare ");
-                }
-                write("var ");
-                write(tempVarName);
-                write(": ");
-                writer.getSymbolAccessibilityDiagnostic = getDefaultExportAccessibilityDiagnostic;
-                resolver.writeTypeOfExpression(node.expression, enclosingDeclaration, 2 /* UseTypeOfFunction */ | 1024 /* UseTypeAliasValue */, writer);
-                write(";");
-                writeLine();
-                write(node.isExportEquals ? "export = " : "export default ");
-                write(tempVarName);
-            }
-            write(";");
-            writeLine();
-            // Make all the declarations visible for the export name
-            if (node.expression.kind === 69 /* Identifier */) {
-                var nodes = resolver.collectLinkedAliases(node.expression);
-                // write each of these declarations asynchronously
-                writeAsynchronousModuleElements(nodes);
-            }
-            function getDefaultExportAccessibilityDiagnostic(diagnostic) {
-                return {
-                    diagnosticMessage: ts.Diagnostics.Default_export_of_the_module_has_or_is_using_private_name_0,
-                    errorNode: node
-                };
-            }
-        }
-        function isModuleElementVisible(node) {
-            return resolver.isDeclarationVisible(node);
+    ts.updateJsxSpreadAttribute = updateJsxSpreadAttribute;
+    function createJsxExpression(dotDotDotToken, expression) {
+        var node = createSynthesizedNode(256 /* JsxExpression */);
+        node.dotDotDotToken = dotDotDotToken;
+        node.expression = expression;
+        return node;
+    }
+    ts.createJsxExpression = createJsxExpression;
+    function updateJsxExpression(node, expression) {
+        return node.expression !== expression
+            ? updateNode(createJsxExpression(node.dotDotDotToken, expression), node)
+            : node;
+    }
+    ts.updateJsxExpression = updateJsxExpression;
+    // Clauses
+    function createCaseClause(expression, statements) {
+        var node = createSynthesizedNode(257 /* CaseClause */);
+        node.expression = ts.parenthesizeExpressionForList(expression);
+        node.statements = createNodeArray(statements);
+        return node;
+    }
+    ts.createCaseClause = createCaseClause;
+    function updateCaseClause(node, expression, statements) {
+        return node.expression !== expression
+            || node.statements !== statements
+            ? updateNode(createCaseClause(expression, statements), node)
+            : node;
+    }
+    ts.updateCaseClause = updateCaseClause;
+    function createDefaultClause(statements) {
+        var node = createSynthesizedNode(258 /* DefaultClause */);
+        node.statements = createNodeArray(statements);
+        return node;
+    }
+    ts.createDefaultClause = createDefaultClause;
+    function updateDefaultClause(node, statements) {
+        return node.statements !== statements
+            ? updateNode(createDefaultClause(statements), node)
+            : node;
+    }
+    ts.updateDefaultClause = updateDefaultClause;
+    function createHeritageClause(token, types) {
+        var node = createSynthesizedNode(259 /* HeritageClause */);
+        node.token = token;
+        node.types = createNodeArray(types);
+        return node;
+    }
+    ts.createHeritageClause = createHeritageClause;
+    function updateHeritageClause(node, types) {
+        return node.types !== types
+            ? updateNode(createHeritageClause(node.token, types), node)
+            : node;
+    }
+    ts.updateHeritageClause = updateHeritageClause;
+    function createCatchClause(variableDeclaration, block) {
+        var node = createSynthesizedNode(260 /* CatchClause */);
+        node.variableDeclaration = typeof variableDeclaration === "string" ? createVariableDeclaration(variableDeclaration) : variableDeclaration;
+        node.block = block;
+        return node;
+    }
+    ts.createCatchClause = createCatchClause;
+    function updateCatchClause(node, variableDeclaration, block) {
+        return node.variableDeclaration !== variableDeclaration
+            || node.block !== block
+            ? updateNode(createCatchClause(variableDeclaration, block), node)
+            : node;
+    }
+    ts.updateCatchClause = updateCatchClause;
+    // Property assignments
+    function createPropertyAssignment(name, initializer) {
+        var node = createSynthesizedNode(261 /* PropertyAssignment */);
+        node.name = asName(name);
+        node.questionToken = undefined;
+        node.initializer = initializer !== undefined ? ts.parenthesizeExpressionForList(initializer) : undefined;
+        return node;
+    }
+    ts.createPropertyAssignment = createPropertyAssignment;
+    function updatePropertyAssignment(node, name, initializer) {
+        return node.name !== name
+            || node.initializer !== initializer
+            ? updateNode(createPropertyAssignment(name, initializer), node)
+            : node;
+    }
+    ts.updatePropertyAssignment = updatePropertyAssignment;
+    function createShorthandPropertyAssignment(name, objectAssignmentInitializer) {
+        var node = createSynthesizedNode(262 /* ShorthandPropertyAssignment */);
+        node.name = asName(name);
+        node.objectAssignmentInitializer = objectAssignmentInitializer !== undefined ? ts.parenthesizeExpressionForList(objectAssignmentInitializer) : undefined;
+        return node;
+    }
+    ts.createShorthandPropertyAssignment = createShorthandPropertyAssignment;
+    function updateShorthandPropertyAssignment(node, name, objectAssignmentInitializer) {
+        return node.name !== name
+            || node.objectAssignmentInitializer !== objectAssignmentInitializer
+            ? updateNode(createShorthandPropertyAssignment(name, objectAssignmentInitializer), node)
+            : node;
+    }
+    ts.updateShorthandPropertyAssignment = updateShorthandPropertyAssignment;
+    function createSpreadAssignment(expression) {
+        var node = createSynthesizedNode(263 /* SpreadAssignment */);
+        node.expression = expression !== undefined ? ts.parenthesizeExpressionForList(expression) : undefined;
+        return node;
+    }
+    ts.createSpreadAssignment = createSpreadAssignment;
+    function updateSpreadAssignment(node, expression) {
+        return node.expression !== expression
+            ? updateNode(createSpreadAssignment(expression), node)
+            : node;
+    }
+    ts.updateSpreadAssignment = updateSpreadAssignment;
+    // Enum
+    function createEnumMember(name, initializer) {
+        var node = createSynthesizedNode(264 /* EnumMember */);
+        node.name = asName(name);
+        node.initializer = initializer && ts.parenthesizeExpressionForList(initializer);
+        return node;
+    }
+    ts.createEnumMember = createEnumMember;
+    function updateEnumMember(node, name, initializer) {
+        return node.name !== name
+            || node.initializer !== initializer
+            ? updateNode(createEnumMember(name, initializer), node)
+            : node;
+    }
+    ts.updateEnumMember = updateEnumMember;
+    // Top-level nodes
+    function updateSourceFileNode(node, statements) {
+        if (node.statements !== statements) {
+            var updated = createSynthesizedNode(265 /* SourceFile */);
+            updated.flags |= node.flags;
+            updated.statements = createNodeArray(statements);
+            updated.endOfFileToken = node.endOfFileToken;
+            updated.fileName = node.fileName;
+            updated.path = node.path;
+            updated.text = node.text;
+            if (node.amdDependencies !== undefined)
+                updated.amdDependencies = node.amdDependencies;
+            if (node.moduleName !== undefined)
+                updated.moduleName = node.moduleName;
+            if (node.referencedFiles !== undefined)
+                updated.referencedFiles = node.referencedFiles;
+            if (node.typeReferenceDirectives !== undefined)
+                updated.typeReferenceDirectives = node.typeReferenceDirectives;
+            if (node.languageVariant !== undefined)
+                updated.languageVariant = node.languageVariant;
+            if (node.isDeclarationFile !== undefined)
+                updated.isDeclarationFile = node.isDeclarationFile;
+            if (node.renamedDependencies !== undefined)
+                updated.renamedDependencies = node.renamedDependencies;
+            if (node.hasNoDefaultLib !== undefined)
+                updated.hasNoDefaultLib = node.hasNoDefaultLib;
+            if (node.languageVersion !== undefined)
+                updated.languageVersion = node.languageVersion;
+            if (node.scriptKind !== undefined)
+                updated.scriptKind = node.scriptKind;
+            if (node.externalModuleIndicator !== undefined)
+                updated.externalModuleIndicator = node.externalModuleIndicator;
+            if (node.commonJsModuleIndicator !== undefined)
+                updated.commonJsModuleIndicator = node.commonJsModuleIndicator;
+            if (node.identifiers !== undefined)
+                updated.identifiers = node.identifiers;
+            if (node.nodeCount !== undefined)
+                updated.nodeCount = node.nodeCount;
+            if (node.identifierCount !== undefined)
+                updated.identifierCount = node.identifierCount;
+            if (node.symbolCount !== undefined)
+                updated.symbolCount = node.symbolCount;
+            if (node.parseDiagnostics !== undefined)
+                updated.parseDiagnostics = node.parseDiagnostics;
+            if (node.bindDiagnostics !== undefined)
+                updated.bindDiagnostics = node.bindDiagnostics;
+            if (node.lineMap !== undefined)
+                updated.lineMap = node.lineMap;
+            if (node.classifiableNames !== undefined)
+                updated.classifiableNames = node.classifiableNames;
+            if (node.resolvedModules !== undefined)
+                updated.resolvedModules = node.resolvedModules;
+            if (node.resolvedTypeReferenceDirectiveNames !== undefined)
+                updated.resolvedTypeReferenceDirectiveNames = node.resolvedTypeReferenceDirectiveNames;
+            if (node.imports !== undefined)
+                updated.imports = node.imports;
+            if (node.moduleAugmentations !== undefined)
+                updated.moduleAugmentations = node.moduleAugmentations;
+            return updateNode(updated, node);
         }
-        function emitModuleElement(node, isModuleElementVisible) {
-            if (isModuleElementVisible) {
-                writeModuleElement(node);
-            }
-            else if (node.kind === 229 /* ImportEqualsDeclaration */ ||
-                (node.parent.kind === 256 /* SourceFile */ && isCurrentFileExternalModule)) {
-                var isVisible = void 0;
-                if (asynchronousSubModuleDeclarationEmitInfo && node.parent.kind !== 256 /* SourceFile */) {
-                    // Import declaration of another module that is visited async so lets put it in right spot
-                    asynchronousSubModuleDeclarationEmitInfo.push({
-                        node: node,
-                        outputPos: writer.getTextPos(),
-                        indent: writer.getIndent(),
-                        isVisible: isVisible
-                    });
-                }
-                else {
-                    if (node.kind === 230 /* ImportDeclaration */) {
-                        var importDeclaration = node;
-                        if (importDeclaration.importClause) {
-                            isVisible = (importDeclaration.importClause.name && resolver.isDeclarationVisible(importDeclaration.importClause)) ||
-                                isVisibleNamedBinding(importDeclaration.importClause.namedBindings);
-                        }
-                    }
-                    moduleElementDeclarationEmitInfo.push({
-                        node: node,
-                        outputPos: writer.getTextPos(),
-                        indent: writer.getIndent(),
-                        isVisible: isVisible
-                    });
-                }
-            }
+        return node;
+    }
+    ts.updateSourceFileNode = updateSourceFileNode;
+    /**
+     * Creates a shallow, memberwise clone of a node for mutation.
+     */
+    function getMutableClone(node) {
+        var clone = getSynthesizedClone(node);
+        clone.pos = node.pos;
+        clone.end = node.end;
+        clone.parent = node.parent;
+        return clone;
+    }
+    ts.getMutableClone = getMutableClone;
+    // Transformation nodes
+    /**
+     * Creates a synthetic statement to act as a placeholder for a not-emitted statement in
+     * order to preserve comments.
+     *
+     * @param original The original statement.
+     */
+    function createNotEmittedStatement(original) {
+        var node = createSynthesizedNode(296 /* NotEmittedStatement */);
+        node.original = original;
+        setTextRange(node, original);
+        return node;
+    }
+    ts.createNotEmittedStatement = createNotEmittedStatement;
+    /**
+     * Creates a synthetic element to act as a placeholder for the end of an emitted declaration in
+     * order to properly emit exports.
+     */
+    /* @internal */
+    function createEndOfDeclarationMarker(original) {
+        var node = createSynthesizedNode(300 /* EndOfDeclarationMarker */);
+        node.emitNode = {};
+        node.original = original;
+        return node;
+    }
+    ts.createEndOfDeclarationMarker = createEndOfDeclarationMarker;
+    /**
+     * Creates a synthetic element to act as a placeholder for the beginning of a merged declaration in
+     * order to properly emit exports.
+     */
+    /* @internal */
+    function createMergeDeclarationMarker(original) {
+        var node = createSynthesizedNode(299 /* MergeDeclarationMarker */);
+        node.emitNode = {};
+        node.original = original;
+        return node;
+    }
+    ts.createMergeDeclarationMarker = createMergeDeclarationMarker;
+    /**
+     * Creates a synthetic expression to act as a placeholder for a not-emitted expression in
+     * order to preserve comments or sourcemap positions.
+     *
+     * @param expression The inner expression to emit.
+     * @param original The original outer expression.
+     * @param location The location for the expression. Defaults to the positions from "original" if provided.
+     */
+    function createPartiallyEmittedExpression(expression, original) {
+        var node = createSynthesizedNode(297 /* PartiallyEmittedExpression */);
+        node.expression = expression;
+        node.original = original;
+        setTextRange(node, original);
+        return node;
+    }
+    ts.createPartiallyEmittedExpression = createPartiallyEmittedExpression;
+    function updatePartiallyEmittedExpression(node, expression) {
+        if (node.expression !== expression) {
+            return updateNode(createPartiallyEmittedExpression(expression, node.original), node);
         }
-        function writeModuleElement(node) {
-            switch (node.kind) {
-                case 220 /* FunctionDeclaration */:
-                    return writeFunctionDeclaration(node);
-                case 200 /* VariableStatement */:
-                    return writeVariableStatement(node);
-                case 222 /* InterfaceDeclaration */:
-                    return writeInterfaceDeclaration(node);
-                case 221 /* ClassDeclaration */:
-                    return writeClassDeclaration(node);
-                case 223 /* TypeAliasDeclaration */:
-                    return writeTypeAliasDeclaration(node);
-                case 224 /* EnumDeclaration */:
-                    return writeEnumDeclaration(node);
-                case 225 /* ModuleDeclaration */:
-                    return writeModuleDeclaration(node);
-                case 229 /* ImportEqualsDeclaration */:
-                    return writeImportEqualsDeclaration(node);
-                case 230 /* ImportDeclaration */:
-                    return writeImportDeclaration(node);
-                default:
-                    ts.Debug.fail("Unknown symbol kind");
+        return node;
+    }
+    ts.updatePartiallyEmittedExpression = updatePartiallyEmittedExpression;
+    function flattenCommaElements(node) {
+        if (ts.nodeIsSynthesized(node) && !ts.isParseTreeNode(node) && !node.original && !node.emitNode && !node.id) {
+            if (node.kind === 298 /* CommaListExpression */) {
+                return node.elements;
             }
-        }
-        function emitModuleElementDeclarationFlags(node) {
-            // If the node is parented in the current source file we need to emit export declare or just export
-            if (node.parent.kind === 256 /* SourceFile */) {
-                var modifiers = ts.getModifierFlags(node);
-                // If the node is exported
-                if (modifiers & 1 /* Export */) {
-                    write("export ");
-                }
-                if (modifiers & 512 /* Default */) {
-                    write("default ");
-                }
-                else if (node.kind !== 222 /* InterfaceDeclaration */ && !noDeclare) {
-                    write("declare ");
-                }
+            if (ts.isBinaryExpression(node) && node.operatorToken.kind === 26 /* CommaToken */) {
+                return [node.left, node.right];
             }
         }
-        function emitClassMemberDeclarationFlags(flags) {
-            if (flags & 8 /* Private */) {
-                write("private ");
-            }
-            else if (flags & 16 /* Protected */) {
-                write("protected ");
-            }
-            if (flags & 32 /* Static */) {
-                write("static ");
-            }
-            if (flags & 64 /* Readonly */) {
-                write("readonly ");
-            }
-            if (flags & 128 /* Abstract */) {
-                write("abstract ");
-            }
+        return node;
+    }
+    function createCommaList(elements) {
+        var node = createSynthesizedNode(298 /* CommaListExpression */);
+        node.elements = createNodeArray(ts.sameFlatMap(elements, flattenCommaElements));
+        return node;
+    }
+    ts.createCommaList = createCommaList;
+    function updateCommaList(node, elements) {
+        return node.elements !== elements
+            ? updateNode(createCommaList(elements), node)
+            : node;
+    }
+    ts.updateCommaList = updateCommaList;
+    function createBundle(sourceFiles) {
+        var node = ts.createNode(266 /* Bundle */);
+        node.sourceFiles = sourceFiles;
+        return node;
+    }
+    ts.createBundle = createBundle;
+    function updateBundle(node, sourceFiles) {
+        if (node.sourceFiles !== sourceFiles) {
+            return createBundle(sourceFiles);
         }
-        function writeImportEqualsDeclaration(node) {
-            // note usage of writer. methods instead of aliases created, just to make sure we are using
-            // correct writer especially to handle asynchronous alias writing
-            emitJsDocComments(node);
-            if (ts.hasModifier(node, 1 /* Export */)) {
-                write("export ");
-            }
-            write("import ");
-            writeTextOfNode(currentText, node.name);
-            write(" = ");
-            if (ts.isInternalModuleImportEqualsDeclaration(node)) {
-                emitTypeWithNewGetSymbolAccessibilityDiagnostic(node.moduleReference, getImportEntityNameVisibilityError);
-                write(";");
-            }
-            else {
-                write("require(");
-                emitExternalModuleSpecifier(node);
-                write(");");
-            }
-            writer.writeLine();
-            function getImportEntityNameVisibilityError(symbolAccessibilityResult) {
-                return {
-                    diagnosticMessage: ts.Diagnostics.Import_declaration_0_is_using_private_name_1,
-                    errorNode: node,
-                    typeName: node.name
-                };
+        return node;
+    }
+    ts.updateBundle = updateBundle;
+    function createImmediatelyInvokedFunctionExpression(statements, param, paramValue) {
+        return createCall(createFunctionExpression(
+        /*modifiers*/ undefined, 
+        /*asteriskToken*/ undefined, 
+        /*name*/ undefined, 
+        /*typeParameters*/ undefined, 
+        /*parameters*/ param ? [param] : [], 
+        /*type*/ undefined, createBlock(statements, /*multiLine*/ true)), 
+        /*typeArguments*/ undefined, 
+        /*argumentsArray*/ paramValue ? [paramValue] : []);
+    }
+    ts.createImmediatelyInvokedFunctionExpression = createImmediatelyInvokedFunctionExpression;
+    function createComma(left, right) {
+        return createBinary(left, 26 /* CommaToken */, right);
+    }
+    ts.createComma = createComma;
+    function createLessThan(left, right) {
+        return createBinary(left, 27 /* LessThanToken */, right);
+    }
+    ts.createLessThan = createLessThan;
+    function createAssignment(left, right) {
+        return createBinary(left, 58 /* EqualsToken */, right);
+    }
+    ts.createAssignment = createAssignment;
+    function createStrictEquality(left, right) {
+        return createBinary(left, 34 /* EqualsEqualsEqualsToken */, right);
+    }
+    ts.createStrictEquality = createStrictEquality;
+    function createStrictInequality(left, right) {
+        return createBinary(left, 35 /* ExclamationEqualsEqualsToken */, right);
+    }
+    ts.createStrictInequality = createStrictInequality;
+    function createAdd(left, right) {
+        return createBinary(left, 37 /* PlusToken */, right);
+    }
+    ts.createAdd = createAdd;
+    function createSubtract(left, right) {
+        return createBinary(left, 38 /* MinusToken */, right);
+    }
+    ts.createSubtract = createSubtract;
+    function createPostfixIncrement(operand) {
+        return createPostfix(operand, 43 /* PlusPlusToken */);
+    }
+    ts.createPostfixIncrement = createPostfixIncrement;
+    function createLogicalAnd(left, right) {
+        return createBinary(left, 53 /* AmpersandAmpersandToken */, right);
+    }
+    ts.createLogicalAnd = createLogicalAnd;
+    function createLogicalOr(left, right) {
+        return createBinary(left, 54 /* BarBarToken */, right);
+    }
+    ts.createLogicalOr = createLogicalOr;
+    function createLogicalNot(operand) {
+        return createPrefix(51 /* ExclamationToken */, operand);
+    }
+    ts.createLogicalNot = createLogicalNot;
+    function createVoidZero() {
+        return createVoid(createLiteral(0));
+    }
+    ts.createVoidZero = createVoidZero;
+    function createExportDefault(expression) {
+        return createExportAssignment(/*decorators*/ undefined, /*modifiers*/ undefined, /*isExportEquals*/ false, expression);
+    }
+    ts.createExportDefault = createExportDefault;
+    function createExternalModuleExport(exportName) {
+        return createExportDeclaration(/*decorators*/ undefined, /*modifiers*/ undefined, createNamedExports([createExportSpecifier(/*propertyName*/ undefined, exportName)]));
+    }
+    ts.createExternalModuleExport = createExternalModuleExport;
+    function asName(name) {
+        return typeof name === "string" ? createIdentifier(name) : name;
+    }
+    function asExpression(value) {
+        return typeof value === "string" || typeof value === "number" ? createLiteral(value) : value;
+    }
+    function asNodeArray(array) {
+        return array ? createNodeArray(array) : undefined;
+    }
+    function asToken(value) {
+        return typeof value === "number" ? createToken(value) : value;
+    }
+    /**
+     * Clears any EmitNode entries from parse-tree nodes.
+     * @param sourceFile A source file.
+     */
+    function disposeEmitNodes(sourceFile) {
+        // During transformation we may need to annotate a parse tree node with transient
+        // transformation properties. As parse tree nodes live longer than transformation
+        // nodes, we need to make sure we reclaim any memory allocated for custom ranges
+        // from these nodes to ensure we do not hold onto entire subtrees just for position
+        // information. We also need to reset these nodes to a pre-transformation state
+        // for incremental parsing scenarios so that we do not impact later emit.
+        sourceFile = ts.getSourceFileOfNode(ts.getParseTreeNode(sourceFile));
+        var emitNode = sourceFile && sourceFile.emitNode;
+        var annotatedNodes = emitNode && emitNode.annotatedNodes;
+        if (annotatedNodes) {
+            for (var _i = 0, annotatedNodes_1 = annotatedNodes; _i < annotatedNodes_1.length; _i++) {
+                var node = annotatedNodes_1[_i];
+                node.emitNode = undefined;
             }
         }
-        function isVisibleNamedBinding(namedBindings) {
-            if (namedBindings) {
-                if (namedBindings.kind === 232 /* NamespaceImport */) {
-                    return resolver.isDeclarationVisible(namedBindings);
-                }
-                else {
-                    return ts.forEach(namedBindings.elements, function (namedImport) { return resolver.isDeclarationVisible(namedImport); });
+    }
+    ts.disposeEmitNodes = disposeEmitNodes;
+    /**
+     * Associates a node with the current transformation, initializing
+     * various transient transformation properties.
+     */
+    /* @internal */
+    function getOrCreateEmitNode(node) {
+        if (!node.emitNode) {
+            if (ts.isParseTreeNode(node)) {
+                // To avoid holding onto transformation artifacts, we keep track of any
+                // parse tree node we are annotating. This allows us to clean them up after
+                // all transformations have completed.
+                if (node.kind === 265 /* SourceFile */) {
+                    return node.emitNode = { annotatedNodes: [node] };
                 }
+                var sourceFile = ts.getSourceFileOfNode(node);
+                getOrCreateEmitNode(sourceFile).annotatedNodes.push(node);
             }
+            node.emitNode = {};
         }
-        function writeImportDeclaration(node) {
-            emitJsDocComments(node);
-            if (ts.hasModifier(node, 1 /* Export */)) {
-                write("export ");
-            }
-            write("import ");
-            if (node.importClause) {
-                var currentWriterPos = writer.getTextPos();
-                if (node.importClause.name && resolver.isDeclarationVisible(node.importClause)) {
-                    writeTextOfNode(currentText, node.importClause.name);
-                }
-                if (node.importClause.namedBindings && isVisibleNamedBinding(node.importClause.namedBindings)) {
-                    if (currentWriterPos !== writer.getTextPos()) {
-                        // If the default binding was emitted, write the separated
-                        write(", ");
-                    }
-                    if (node.importClause.namedBindings.kind === 232 /* NamespaceImport */) {
-                        write("* as ");
-                        writeTextOfNode(currentText, node.importClause.namedBindings.name);
-                    }
-                    else {
-                        write("{ ");
-                        emitCommaList(node.importClause.namedBindings.elements, emitImportOrExportSpecifier, resolver.isDeclarationVisible);
-                        write(" }");
-                    }
-                }
-                write(" from ");
-            }
-            emitExternalModuleSpecifier(node);
-            write(";");
-            writer.writeLine();
+        return node.emitNode;
+    }
+    ts.getOrCreateEmitNode = getOrCreateEmitNode;
+    function setTextRange(range, location) {
+        if (location) {
+            range.pos = location.pos;
+            range.end = location.end;
         }
-        function emitExternalModuleSpecifier(parent) {
-            // emitExternalModuleSpecifier is usually called when we emit something in the.d.ts file that will make it an external module (i.e. import/export declarations).
-            // the only case when it is not true is when we call it to emit correct name for module augmentation - d.ts files with just module augmentations are not considered
-            // external modules since they are indistinguishable from script files with ambient modules. To fix this in such d.ts files we'll emit top level 'export {}'
-            // so compiler will treat them as external modules.
-            resultHasExternalModuleIndicator = resultHasExternalModuleIndicator || parent.kind !== 225 /* ModuleDeclaration */;
-            var moduleSpecifier;
-            if (parent.kind === 229 /* ImportEqualsDeclaration */) {
-                var node = parent;
-                moduleSpecifier = ts.getExternalModuleImportEqualsDeclarationExpression(node);
-            }
-            else if (parent.kind === 225 /* ModuleDeclaration */) {
-                moduleSpecifier = parent.name;
-            }
-            else {
-                var node = parent;
-                moduleSpecifier = node.moduleSpecifier;
-            }
-            if (moduleSpecifier.kind === 9 /* StringLiteral */ && isBundledEmit && (compilerOptions.out || compilerOptions.outFile)) {
-                var moduleName = ts.getExternalModuleNameFromDeclaration(host, resolver, parent);
-                if (moduleName) {
-                    write('"');
-                    write(moduleName);
-                    write('"');
-                    return;
+        return range;
+    }
+    ts.setTextRange = setTextRange;
+    /**
+     * Sets flags that control emit behavior of a node.
+     */
+    function setEmitFlags(node, emitFlags) {
+        getOrCreateEmitNode(node).flags = emitFlags;
+        return node;
+    }
+    ts.setEmitFlags = setEmitFlags;
+    /**
+     * Gets a custom text range to use when emitting source maps.
+     */
+    function getSourceMapRange(node) {
+        var emitNode = node.emitNode;
+        return (emitNode && emitNode.sourceMapRange) || node;
+    }
+    ts.getSourceMapRange = getSourceMapRange;
+    /**
+     * Sets a custom text range to use when emitting source maps.
+     */
+    function setSourceMapRange(node, range) {
+        getOrCreateEmitNode(node).sourceMapRange = range;
+        return node;
+    }
+    ts.setSourceMapRange = setSourceMapRange;
+    var SourceMapSource;
+    /**
+     * Create an external source map source file reference
+     */
+    function createSourceMapSource(fileName, text, skipTrivia) {
+        return new (SourceMapSource || (SourceMapSource = ts.objectAllocator.getSourceMapSourceConstructor()))(fileName, text, skipTrivia);
+    }
+    ts.createSourceMapSource = createSourceMapSource;
+    /**
+     * Gets the TextRange to use for source maps for a token of a node.
+     */
+    function getTokenSourceMapRange(node, token) {
+        var emitNode = node.emitNode;
+        var tokenSourceMapRanges = emitNode && emitNode.tokenSourceMapRanges;
+        return tokenSourceMapRanges && tokenSourceMapRanges[token];
+    }
+    ts.getTokenSourceMapRange = getTokenSourceMapRange;
+    /**
+     * Sets the TextRange to use for source maps for a token of a node.
+     */
+    function setTokenSourceMapRange(node, token, range) {
+        var emitNode = getOrCreateEmitNode(node);
+        var tokenSourceMapRanges = emitNode.tokenSourceMapRanges || (emitNode.tokenSourceMapRanges = []);
+        tokenSourceMapRanges[token] = range;
+        return node;
+    }
+    ts.setTokenSourceMapRange = setTokenSourceMapRange;
+    /**
+     * Gets a custom text range to use when emitting comments.
+     */
+    function getCommentRange(node) {
+        var emitNode = node.emitNode;
+        return (emitNode && emitNode.commentRange) || node;
+    }
+    ts.getCommentRange = getCommentRange;
+    /**
+     * Sets a custom text range to use when emitting comments.
+     */
+    function setCommentRange(node, range) {
+        getOrCreateEmitNode(node).commentRange = range;
+        return node;
+    }
+    ts.setCommentRange = setCommentRange;
+    function getSyntheticLeadingComments(node) {
+        var emitNode = node.emitNode;
+        return emitNode && emitNode.leadingComments;
+    }
+    ts.getSyntheticLeadingComments = getSyntheticLeadingComments;
+    function setSyntheticLeadingComments(node, comments) {
+        getOrCreateEmitNode(node).leadingComments = comments;
+        return node;
+    }
+    ts.setSyntheticLeadingComments = setSyntheticLeadingComments;
+    function addSyntheticLeadingComment(node, kind, text, hasTrailingNewLine) {
+        return setSyntheticLeadingComments(node, ts.append(getSyntheticLeadingComments(node), { kind: kind, pos: -1, end: -1, hasTrailingNewLine: hasTrailingNewLine, text: text }));
+    }
+    ts.addSyntheticLeadingComment = addSyntheticLeadingComment;
+    function getSyntheticTrailingComments(node) {
+        var emitNode = node.emitNode;
+        return emitNode && emitNode.trailingComments;
+    }
+    ts.getSyntheticTrailingComments = getSyntheticTrailingComments;
+    function setSyntheticTrailingComments(node, comments) {
+        getOrCreateEmitNode(node).trailingComments = comments;
+        return node;
+    }
+    ts.setSyntheticTrailingComments = setSyntheticTrailingComments;
+    function addSyntheticTrailingComment(node, kind, text, hasTrailingNewLine) {
+        return setSyntheticTrailingComments(node, ts.append(getSyntheticTrailingComments(node), { kind: kind, pos: -1, end: -1, hasTrailingNewLine: hasTrailingNewLine, text: text }));
+    }
+    ts.addSyntheticTrailingComment = addSyntheticTrailingComment;
+    /**
+     * Gets the constant value to emit for an expression.
+     */
+    function getConstantValue(node) {
+        var emitNode = node.emitNode;
+        return emitNode && emitNode.constantValue;
+    }
+    ts.getConstantValue = getConstantValue;
+    /**
+     * Sets the constant value to emit for an expression.
+     */
+    function setConstantValue(node, value) {
+        var emitNode = getOrCreateEmitNode(node);
+        emitNode.constantValue = value;
+        return node;
+    }
+    ts.setConstantValue = setConstantValue;
+    /**
+     * Adds an EmitHelper to a node.
+     */
+    function addEmitHelper(node, helper) {
+        var emitNode = getOrCreateEmitNode(node);
+        emitNode.helpers = ts.append(emitNode.helpers, helper);
+        return node;
+    }
+    ts.addEmitHelper = addEmitHelper;
+    /**
+     * Add EmitHelpers to a node.
+     */
+    function addEmitHelpers(node, helpers) {
+        if (ts.some(helpers)) {
+            var emitNode = getOrCreateEmitNode(node);
+            for (var _i = 0, helpers_1 = helpers; _i < helpers_1.length; _i++) {
+                var helper = helpers_1[_i];
+                if (!ts.contains(emitNode.helpers, helper)) {
+                    emitNode.helpers = ts.append(emitNode.helpers, helper);
                 }
             }
-            writeTextOfNode(currentText, moduleSpecifier);
-        }
-        function emitImportOrExportSpecifier(node) {
-            if (node.propertyName) {
-                writeTextOfNode(currentText, node.propertyName);
-                write(" as ");
-            }
-            writeTextOfNode(currentText, node.name);
-        }
-        function emitExportSpecifier(node) {
-            emitImportOrExportSpecifier(node);
-            // Make all the declarations visible for the export name
-            var nodes = resolver.collectLinkedAliases(node.propertyName || node.name);
-            // write each of these declarations asynchronously
-            writeAsynchronousModuleElements(nodes);
         }
-        function emitExportDeclaration(node) {
-            emitJsDocComments(node);
-            write("export ");
-            if (node.exportClause) {
-                write("{ ");
-                emitCommaList(node.exportClause.elements, emitExportSpecifier);
-                write(" }");
-            }
-            else {
-                write("*");
-            }
-            if (node.moduleSpecifier) {
-                write(" from ");
-                emitExternalModuleSpecifier(node);
+        return node;
+    }
+    ts.addEmitHelpers = addEmitHelpers;
+    /**
+     * Removes an EmitHelper from a node.
+     */
+    function removeEmitHelper(node, helper) {
+        var emitNode = node.emitNode;
+        if (emitNode) {
+            var helpers = emitNode.helpers;
+            if (helpers) {
+                return ts.orderedRemoveItem(helpers, helper);
             }
-            write(";");
-            writer.writeLine();
         }
-        function writeModuleDeclaration(node) {
-            emitJsDocComments(node);
-            emitModuleElementDeclarationFlags(node);
-            if (ts.isGlobalScopeAugmentation(node)) {
-                write("global ");
-            }
-            else {
-                if (node.flags & 16 /* Namespace */) {
-                    write("namespace ");
-                }
-                else {
-                    write("module ");
-                }
-                if (ts.isExternalModuleAugmentation(node)) {
-                    emitExternalModuleSpecifier(node);
-                }
-                else {
-                    writeTextOfNode(currentText, node.name);
+        return false;
+    }
+    ts.removeEmitHelper = removeEmitHelper;
+    /**
+     * Gets the EmitHelpers of a node.
+     */
+    function getEmitHelpers(node) {
+        var emitNode = node.emitNode;
+        return emitNode && emitNode.helpers;
+    }
+    ts.getEmitHelpers = getEmitHelpers;
+    /**
+     * Moves matching emit helpers from a source node to a target node.
+     */
+    function moveEmitHelpers(source, target, predicate) {
+        var sourceEmitNode = source.emitNode;
+        var sourceEmitHelpers = sourceEmitNode && sourceEmitNode.helpers;
+        if (!ts.some(sourceEmitHelpers))
+            return;
+        var targetEmitNode = getOrCreateEmitNode(target);
+        var helpersRemoved = 0;
+        for (var i = 0; i < sourceEmitHelpers.length; i++) {
+            var helper = sourceEmitHelpers[i];
+            if (predicate(helper)) {
+                helpersRemoved++;
+                if (!ts.contains(targetEmitNode.helpers, helper)) {
+                    targetEmitNode.helpers = ts.append(targetEmitNode.helpers, helper);
                 }
             }
-            while (node.body && node.body.kind !== 226 /* ModuleBlock */) {
-                node = node.body;
-                write(".");
-                writeTextOfNode(currentText, node.name);
-            }
-            var prevEnclosingDeclaration = enclosingDeclaration;
-            if (node.body) {
-                enclosingDeclaration = node;
-                write(" {");
-                writeLine();
-                increaseIndent();
-                emitLines(node.body.statements);
-                decreaseIndent();
-                write("}");
-                writeLine();
-                enclosingDeclaration = prevEnclosingDeclaration;
-            }
-            else {
-                write(";");
+            else if (helpersRemoved > 0) {
+                sourceEmitHelpers[i - helpersRemoved] = helper;
             }
         }
-        function writeTypeAliasDeclaration(node) {
-            var prevEnclosingDeclaration = enclosingDeclaration;
-            enclosingDeclaration = node;
-            emitJsDocComments(node);
-            emitModuleElementDeclarationFlags(node);
-            write("type ");
-            writeTextOfNode(currentText, node.name);
-            emitTypeParameters(node.typeParameters);
-            write(" = ");
-            emitTypeWithNewGetSymbolAccessibilityDiagnostic(node.type, getTypeAliasDeclarationVisibilityError);
-            write(";");
-            writeLine();
-            enclosingDeclaration = prevEnclosingDeclaration;
-            function getTypeAliasDeclarationVisibilityError(symbolAccessibilityResult) {
-                return {
-                    diagnosticMessage: ts.Diagnostics.Exported_type_alias_0_has_or_is_using_private_name_1,
-                    errorNode: node.type,
-                    typeName: node.name
-                };
-            }
+        if (helpersRemoved > 0) {
+            sourceEmitHelpers.length -= helpersRemoved;
         }
-        function writeEnumDeclaration(node) {
-            emitJsDocComments(node);
-            emitModuleElementDeclarationFlags(node);
-            if (ts.isConst(node)) {
-                write("const ");
-            }
-            write("enum ");
-            writeTextOfNode(currentText, node.name);
-            write(" {");
-            writeLine();
-            increaseIndent();
-            emitLines(node.members);
-            decreaseIndent();
-            write("}");
-            writeLine();
+    }
+    ts.moveEmitHelpers = moveEmitHelpers;
+    /* @internal */
+    function compareEmitHelpers(x, y) {
+        if (x === y)
+            return 0 /* EqualTo */;
+        if (x.priority === y.priority)
+            return 0 /* EqualTo */;
+        if (x.priority === undefined)
+            return 1 /* GreaterThan */;
+        if (y.priority === undefined)
+            return -1 /* LessThan */;
+        return ts.compareValues(x.priority, y.priority);
+    }
+    ts.compareEmitHelpers = compareEmitHelpers;
+    function setOriginalNode(node, original) {
+        node.original = original;
+        if (original) {
+            var emitNode = original.emitNode;
+            if (emitNode)
+                node.emitNode = mergeEmitNode(emitNode, node.emitNode);
         }
-        function emitEnumMemberDeclaration(node) {
-            emitJsDocComments(node);
-            writeTextOfNode(currentText, node.name);
-            var enumMemberValue = resolver.getConstantValue(node);
-            if (enumMemberValue !== undefined) {
-                write(" = ");
-                write(enumMemberValue.toString());
-            }
-            write(",");
-            writeLine();
+        return node;
+    }
+    ts.setOriginalNode = setOriginalNode;
+    function mergeEmitNode(sourceEmitNode, destEmitNode) {
+        var flags = sourceEmitNode.flags, leadingComments = sourceEmitNode.leadingComments, trailingComments = sourceEmitNode.trailingComments, commentRange = sourceEmitNode.commentRange, sourceMapRange = sourceEmitNode.sourceMapRange, tokenSourceMapRanges = sourceEmitNode.tokenSourceMapRanges, constantValue = sourceEmitNode.constantValue, helpers = sourceEmitNode.helpers;
+        if (!destEmitNode)
+            destEmitNode = {};
+        // We are using `.slice()` here in case `destEmitNode.leadingComments` is pushed to later.
+        if (leadingComments)
+            destEmitNode.leadingComments = ts.addRange(leadingComments.slice(), destEmitNode.leadingComments);
+        if (trailingComments)
+            destEmitNode.trailingComments = ts.addRange(trailingComments.slice(), destEmitNode.trailingComments);
+        if (flags)
+            destEmitNode.flags = flags;
+        if (commentRange)
+            destEmitNode.commentRange = commentRange;
+        if (sourceMapRange)
+            destEmitNode.sourceMapRange = sourceMapRange;
+        if (tokenSourceMapRanges)
+            destEmitNode.tokenSourceMapRanges = mergeTokenSourceMapRanges(tokenSourceMapRanges, destEmitNode.tokenSourceMapRanges);
+        if (constantValue !== undefined)
+            destEmitNode.constantValue = constantValue;
+        if (helpers)
+            destEmitNode.helpers = ts.addRange(destEmitNode.helpers, helpers);
+        return destEmitNode;
+    }
+    function mergeTokenSourceMapRanges(sourceRanges, destRanges) {
+        if (!destRanges)
+            destRanges = [];
+        for (var key in sourceRanges) {
+            destRanges[key] = sourceRanges[key];
         }
-        function isPrivateMethodTypeParameter(node) {
-            return node.parent.kind === 147 /* MethodDeclaration */ && ts.hasModifier(node.parent, 8 /* Private */);
+        return destRanges;
+    }
+})(ts || (ts = {}));
+/* @internal */
+(function (ts) {
+    ts.nullTransformationContext = {
+        enableEmitNotification: ts.noop,
+        enableSubstitution: ts.noop,
+        endLexicalEnvironment: function () { return undefined; },
+        getCompilerOptions: ts.notImplemented,
+        getEmitHost: ts.notImplemented,
+        getEmitResolver: ts.notImplemented,
+        hoistFunctionDeclaration: ts.noop,
+        hoistVariableDeclaration: ts.noop,
+        isEmitNotificationEnabled: ts.notImplemented,
+        isSubstitutionEnabled: ts.notImplemented,
+        onEmitNode: ts.noop,
+        onSubstituteNode: ts.notImplemented,
+        readEmitHelpers: ts.notImplemented,
+        requestEmitHelper: ts.noop,
+        resumeLexicalEnvironment: ts.noop,
+        startLexicalEnvironment: ts.noop,
+        suspendLexicalEnvironment: ts.noop
+    };
+    function createTypeCheck(value, tag) {
+        return tag === "undefined"
+            ? ts.createStrictEquality(value, ts.createVoidZero())
+            : ts.createStrictEquality(ts.createTypeOf(value), ts.createLiteral(tag));
+    }
+    ts.createTypeCheck = createTypeCheck;
+    function createMemberAccessForPropertyName(target, memberName, location) {
+        if (ts.isComputedPropertyName(memberName)) {
+            return ts.setTextRange(ts.createElementAccess(target, memberName.expression), location);
         }
-        function emitTypeParameters(typeParameters) {
-            function emitTypeParameter(node) {
-                increaseIndent();
-                emitJsDocComments(node);
-                decreaseIndent();
-                writeTextOfNode(currentText, node.name);
-                // If there is constraint present and this is not a type parameter of the private method emit the constraint
-                if (node.constraint && !isPrivateMethodTypeParameter(node)) {
-                    write(" extends ");
-                    if (node.parent.kind === 156 /* FunctionType */ ||
-                        node.parent.kind === 157 /* ConstructorType */ ||
-                        (node.parent.parent && node.parent.parent.kind === 159 /* TypeLiteral */)) {
-                        ts.Debug.assert(node.parent.kind === 147 /* MethodDeclaration */ ||
-                            node.parent.kind === 146 /* MethodSignature */ ||
-                            node.parent.kind === 156 /* FunctionType */ ||
-                            node.parent.kind === 157 /* ConstructorType */ ||
-                            node.parent.kind === 151 /* CallSignature */ ||
-                            node.parent.kind === 152 /* ConstructSignature */);
-                        emitType(node.constraint);
-                    }
-                    else {
-                        emitTypeWithNewGetSymbolAccessibilityDiagnostic(node.constraint, getTypeParameterConstraintVisibilityError);
-                    }
-                }
-                function getTypeParameterConstraintVisibilityError(symbolAccessibilityResult) {
-                    // Type parameter constraints are named by user so we should always be able to name it
-                    var diagnosticMessage;
-                    switch (node.parent.kind) {
-                        case 221 /* ClassDeclaration */:
-                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_class_has_or_is_using_private_name_1;
-                            break;
-                        case 222 /* InterfaceDeclaration */:
-                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1;
-                            break;
-                        case 152 /* ConstructSignature */:
-                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1;
-                            break;
-                        case 151 /* CallSignature */:
-                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1;
-                            break;
-                        case 147 /* MethodDeclaration */:
-                        case 146 /* MethodSignature */:
-                            if (ts.hasModifier(node.parent, 32 /* Static */)) {
-                                diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1;
-                            }
-                            else if (node.parent.parent.kind === 221 /* ClassDeclaration */) {
-                                diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1;
-                            }
-                            else {
-                                diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1;
-                            }
-                            break;
-                        case 220 /* FunctionDeclaration */:
-                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_function_has_or_is_using_private_name_1;
-                            break;
-                        default:
-                            ts.Debug.fail("This is unknown parent for type parameter: " + node.parent.kind);
-                    }
-                    return {
-                        diagnosticMessage: diagnosticMessage,
-                        errorNode: node,
-                        typeName: node.name
-                    };
-                }
-            }
-            if (typeParameters) {
-                write("<");
-                emitCommaList(typeParameters, emitTypeParameter);
-                write(">");
-            }
+        else {
+            var expression = ts.setTextRange(ts.isIdentifier(memberName)
+                ? ts.createPropertyAccess(target, memberName)
+                : ts.createElementAccess(target, memberName), memberName);
+            ts.getOrCreateEmitNode(expression).flags |= 64 /* NoNestedSourceMaps */;
+            return expression;
         }
-        function emitHeritageClause(typeReferences, isImplementsList) {
-            if (typeReferences) {
-                write(isImplementsList ? " implements " : " extends ");
-                emitCommaList(typeReferences, emitTypeOfTypeReference);
-            }
-            function emitTypeOfTypeReference(node) {
-                if (ts.isEntityNameExpression(node.expression)) {
-                    emitTypeWithNewGetSymbolAccessibilityDiagnostic(node, getHeritageClauseVisibilityError);
-                }
-                else if (!isImplementsList && node.expression.kind === 93 /* NullKeyword */) {
-                    write("null");
-                }
-                else {
-                    writer.getSymbolAccessibilityDiagnostic = getHeritageClauseVisibilityError;
-                    resolver.writeBaseConstructorTypeOfClass(enclosingDeclaration, enclosingDeclaration, 2 /* UseTypeOfFunction */ | 1024 /* UseTypeAliasValue */, writer);
-                }
-                function getHeritageClauseVisibilityError(symbolAccessibilityResult) {
-                    var diagnosticMessage;
-                    // Heritage clause is written by user so it can always be named
-                    if (node.parent.parent.kind === 221 /* ClassDeclaration */) {
-                        // Class or Interface implemented/extended is inaccessible
-                        diagnosticMessage = isImplementsList ?
-                            ts.Diagnostics.Implements_clause_of_exported_class_0_has_or_is_using_private_name_1 :
-                            ts.Diagnostics.Extends_clause_of_exported_class_0_has_or_is_using_private_name_1;
-                    }
-                    else {
-                        // interface is inaccessible
-                        diagnosticMessage = ts.Diagnostics.Extends_clause_of_exported_interface_0_has_or_is_using_private_name_1;
-                    }
-                    return {
-                        diagnosticMessage: diagnosticMessage,
-                        errorNode: node,
-                        typeName: node.parent.parent.name
-                    };
-                }
-            }
+    }
+    ts.createMemberAccessForPropertyName = createMemberAccessForPropertyName;
+    function createFunctionCall(func, thisArg, argumentsList, location) {
+        return ts.setTextRange(ts.createCall(ts.createPropertyAccess(func, "call"), 
+        /*typeArguments*/ undefined, [
+            thisArg
+        ].concat(argumentsList)), location);
+    }
+    ts.createFunctionCall = createFunctionCall;
+    function createFunctionApply(func, thisArg, argumentsExpression, location) {
+        return ts.setTextRange(ts.createCall(ts.createPropertyAccess(func, "apply"), 
+        /*typeArguments*/ undefined, [
+            thisArg,
+            argumentsExpression
+        ]), location);
+    }
+    ts.createFunctionApply = createFunctionApply;
+    function createArraySlice(array, start) {
+        var argumentsList = [];
+        if (start !== undefined) {
+            argumentsList.push(typeof start === "number" ? ts.createLiteral(start) : start);
         }
-        function writeClassDeclaration(node) {
-            function emitParameterProperties(constructorDeclaration) {
-                if (constructorDeclaration) {
-                    ts.forEach(constructorDeclaration.parameters, function (param) {
-                        if (ts.hasModifier(param, 92 /* ParameterPropertyModifier */)) {
-                            emitPropertyDeclaration(param);
-                        }
-                    });
-                }
-            }
-            emitJsDocComments(node);
-            emitModuleElementDeclarationFlags(node);
-            if (ts.hasModifier(node, 128 /* Abstract */)) {
-                write("abstract ");
-            }
-            write("class ");
-            writeTextOfNode(currentText, node.name);
-            var prevEnclosingDeclaration = enclosingDeclaration;
-            enclosingDeclaration = node;
-            emitTypeParameters(node.typeParameters);
-            var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
-            if (baseTypeNode) {
-                emitHeritageClause([baseTypeNode], /*isImplementsList*/ false);
-            }
-            emitHeritageClause(ts.getClassImplementsHeritageClauseElements(node), /*isImplementsList*/ true);
-            write(" {");
-            writeLine();
-            increaseIndent();
-            emitParameterProperties(ts.getFirstConstructorWithBody(node));
-            emitLines(node.members);
-            decreaseIndent();
-            write("}");
-            writeLine();
-            enclosingDeclaration = prevEnclosingDeclaration;
+        return ts.createCall(ts.createPropertyAccess(array, "slice"), /*typeArguments*/ undefined, argumentsList);
+    }
+    ts.createArraySlice = createArraySlice;
+    function createArrayConcat(array, values) {
+        return ts.createCall(ts.createPropertyAccess(array, "concat"), 
+        /*typeArguments*/ undefined, values);
+    }
+    ts.createArrayConcat = createArrayConcat;
+    function createMathPow(left, right, location) {
+        return ts.setTextRange(ts.createCall(ts.createPropertyAccess(ts.createIdentifier("Math"), "pow"), 
+        /*typeArguments*/ undefined, [left, right]), location);
+    }
+    ts.createMathPow = createMathPow;
+    function createReactNamespace(reactNamespace, parent) {
+        // To ensure the emit resolver can properly resolve the namespace, we need to
+        // treat this identifier as if it were a source tree node by clearing the `Synthesized`
+        // flag and setting a parent node.
+        var react = ts.createIdentifier(reactNamespace || "React");
+        react.flags &= ~8 /* Synthesized */;
+        // Set the parent that is in parse tree
+        // this makes sure that parent chain is intact for checker to traverse complete scope tree
+        react.parent = ts.getParseTreeNode(parent);
+        return react;
+    }
+    function createJsxFactoryExpressionFromEntityName(jsxFactory, parent) {
+        if (ts.isQualifiedName(jsxFactory)) {
+            var left = createJsxFactoryExpressionFromEntityName(jsxFactory.left, parent);
+            var right = ts.createIdentifier(jsxFactory.right.text);
+            right.text = jsxFactory.right.text;
+            return ts.createPropertyAccess(left, right);
         }
-        function writeInterfaceDeclaration(node) {
-            emitJsDocComments(node);
-            emitModuleElementDeclarationFlags(node);
-            write("interface ");
-            writeTextOfNode(currentText, node.name);
-            var prevEnclosingDeclaration = enclosingDeclaration;
-            enclosingDeclaration = node;
-            emitTypeParameters(node.typeParameters);
-            emitHeritageClause(ts.getInterfaceBaseTypeNodes(node), /*isImplementsList*/ false);
-            write(" {");
-            writeLine();
-            increaseIndent();
-            emitLines(node.members);
-            decreaseIndent();
-            write("}");
-            writeLine();
-            enclosingDeclaration = prevEnclosingDeclaration;
+        else {
+            return createReactNamespace(jsxFactory.text, parent);
         }
-        function emitPropertyDeclaration(node) {
-            if (ts.hasDynamicName(node)) {
-                return;
-            }
-            emitJsDocComments(node);
-            emitClassMemberDeclarationFlags(ts.getModifierFlags(node));
-            emitVariableDeclaration(node);
-            write(";");
-            writeLine();
+    }
+    function createJsxFactoryExpression(jsxFactoryEntity, reactNamespace, parent) {
+        return jsxFactoryEntity ?
+            createJsxFactoryExpressionFromEntityName(jsxFactoryEntity, parent) :
+            ts.createPropertyAccess(createReactNamespace(reactNamespace, parent), "createElement");
+    }
+    function createExpressionForJsxElement(jsxFactoryEntity, reactNamespace, tagName, props, children, parentElement, location) {
+        var argumentsList = [tagName];
+        if (props) {
+            argumentsList.push(props);
         }
-        function emitVariableDeclaration(node) {
-            // If we are emitting property it isn't moduleElement and hence we already know it needs to be emitted
-            // so there is no check needed to see if declaration is visible
-            if (node.kind !== 218 /* VariableDeclaration */ || resolver.isDeclarationVisible(node)) {
-                if (ts.isBindingPattern(node.name)) {
-                    emitBindingPattern(node.name);
-                }
-                else {
-                    // If this node is a computed name, it can only be a symbol, because we've already skipped
-                    // it if it's not a well known symbol. In that case, the text of the name will be exactly
-                    // what we want, namely the name expression enclosed in brackets.
-                    writeTextOfNode(currentText, node.name);
-                    // If optional property emit ? but in the case of parameterProperty declaration with "?" indicating optional parameter for the constructor
-                    // we don't want to emit property declaration with "?"
-                    if ((node.kind === 145 /* PropertyDeclaration */ || node.kind === 144 /* PropertySignature */ ||
-                        (node.kind === 142 /* Parameter */ && !ts.isParameterPropertyDeclaration(node))) && ts.hasQuestionToken(node)) {
-                        write("?");
-                    }
-                    if ((node.kind === 145 /* PropertyDeclaration */ || node.kind === 144 /* PropertySignature */) && node.parent.kind === 159 /* TypeLiteral */) {
-                        emitTypeOfVariableDeclarationFromTypeLiteral(node);
-                    }
-                    else if (resolver.isLiteralConstDeclaration(node)) {
-                        write(" = ");
-                        resolver.writeLiteralConstValue(node, writer);
-                    }
-                    else if (!ts.hasModifier(node, 8 /* Private */)) {
-                        writeTypeOfDeclaration(node, node.type, getVariableDeclarationTypeVisibilityError);
-                    }
-                }
-            }
-            function getVariableDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult) {
-                if (node.kind === 218 /* VariableDeclaration */) {
-                    return symbolAccessibilityResult.errorModuleName ?
-                        symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
-                            ts.Diagnostics.Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
-                            ts.Diagnostics.Exported_variable_0_has_or_is_using_name_1_from_private_module_2 :
-                        ts.Diagnostics.Exported_variable_0_has_or_is_using_private_name_1;
-                }
-                else if (node.kind === 145 /* PropertyDeclaration */ || node.kind === 144 /* PropertySignature */) {
-                    // TODO(jfreeman): Deal with computed properties in error reporting.
-                    if (ts.hasModifier(node, 32 /* Static */)) {
-                        return symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
-                                ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
-                                ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_private_name_1;
-                    }
-                    else if (node.parent.kind === 221 /* ClassDeclaration */) {
-                        return symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
-                                ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
-                                ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_private_name_1;
-                    }
-                    else {
-                        // Interfaces cannot have types that cannot be named
-                        return symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Property_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Property_0_of_exported_interface_has_or_is_using_private_name_1;
-                    }
-                }
-            }
-            function getVariableDeclarationTypeVisibilityError(symbolAccessibilityResult) {
-                var diagnosticMessage = getVariableDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult);
-                return diagnosticMessage !== undefined ? {
-                    diagnosticMessage: diagnosticMessage,
-                    errorNode: node,
-                    typeName: node.name
-                } : undefined;
-            }
-            function emitBindingPattern(bindingPattern) {
-                // Only select non-omitted expression from the bindingPattern's elements.
-                // We have to do this to avoid emitting trailing commas.
-                // For example:
-                //      original: var [, c,,] = [ 2,3,4]
-                //      emitted: declare var c: number; // instead of declare var c:number, ;
-                var elements = [];
-                for (var _i = 0, _a = bindingPattern.elements; _i < _a.length; _i++) {
-                    var element = _a[_i];
-                    if (element.kind !== 193 /* OmittedExpression */) {
-                        elements.push(element);
-                    }
-                }
-                emitCommaList(elements, emitBindingElement);
+        if (children && children.length > 0) {
+            if (!props) {
+                argumentsList.push(ts.createNull());
             }
-            function emitBindingElement(bindingElement) {
-                function getBindingElementTypeVisibilityError(symbolAccessibilityResult) {
-                    var diagnosticMessage = getVariableDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult);
-                    return diagnosticMessage !== undefined ? {
-                        diagnosticMessage: diagnosticMessage,
-                        errorNode: bindingElement,
-                        typeName: bindingElement.name
-                    } : undefined;
-                }
-                if (bindingElement.name) {
-                    if (ts.isBindingPattern(bindingElement.name)) {
-                        emitBindingPattern(bindingElement.name);
-                    }
-                    else {
-                        writeTextOfNode(currentText, bindingElement.name);
-                        writeTypeOfDeclaration(bindingElement, /*type*/ undefined, getBindingElementTypeVisibilityError);
-                    }
+            if (children.length > 1) {
+                for (var _i = 0, children_1 = children; _i < children_1.length; _i++) {
+                    var child = children_1[_i];
+                    child.startsOnNewLine = true;
+                    argumentsList.push(child);
                 }
             }
-        }
-        function emitTypeOfVariableDeclarationFromTypeLiteral(node) {
-            // if this is property of type literal,
-            // or is parameter of method/call/construct/index signature of type literal
-            // emit only if type is specified
-            if (node.type) {
-                write(": ");
-                emitType(node.type);
+            else {
+                argumentsList.push(children[0]);
             }
         }
-        function isVariableStatementVisible(node) {
-            return ts.forEach(node.declarationList.declarations, function (varDeclaration) { return resolver.isDeclarationVisible(varDeclaration); });
+        return ts.setTextRange(ts.createCall(createJsxFactoryExpression(jsxFactoryEntity, reactNamespace, parentElement), 
+        /*typeArguments*/ undefined, argumentsList), location);
+    }
+    ts.createExpressionForJsxElement = createExpressionForJsxElement;
+    // Helpers
+    function getHelperName(name) {
+        return ts.setEmitFlags(ts.createIdentifier(name), 4096 /* HelperName */ | 2 /* AdviseOnEmitNode */);
+    }
+    ts.getHelperName = getHelperName;
+    var valuesHelper = {
+        name: "typescript:values",
+        scoped: false,
+        text: "\n            var __values = (this && this.__values) || function (o) {\n                var m = typeof Symbol === \"function\" && o[Symbol.iterator], i = 0;\n                if (m) return m.call(o);\n                return {\n                    next: function () {\n                        if (o && i >= o.length) o = void 0;\n                        return { value: o && o[i++], done: !o };\n                    }\n                };\n            };\n        "
+    };
+    function createValuesHelper(context, expression, location) {
+        context.requestEmitHelper(valuesHelper);
+        return ts.setTextRange(ts.createCall(getHelperName("__values"), 
+        /*typeArguments*/ undefined, [expression]), location);
+    }
+    ts.createValuesHelper = createValuesHelper;
+    var readHelper = {
+        name: "typescript:read",
+        scoped: false,
+        text: "\n            var __read = (this && this.__read) || function (o, n) {\n                var m = typeof Symbol === \"function\" && o[Symbol.iterator];\n                if (!m) return o;\n                var i = m.call(o), r, ar = [], e;\n                try {\n                    while ((n === void 0 || n-- > 0) && !(r = i.next()).done) ar.push(r.value);\n                }\n                catch (error) { e = { error: error }; }\n                finally {\n                    try {\n                        if (r && !r.done && (m = i[\"return\"])) m.call(i);\n                    }\n                    finally { if (e) throw e.error; }\n                }\n                return ar;\n            };\n        "
+    };
+    function createReadHelper(context, iteratorRecord, count, location) {
+        context.requestEmitHelper(readHelper);
+        return ts.setTextRange(ts.createCall(getHelperName("__read"), 
+        /*typeArguments*/ undefined, count !== undefined
+            ? [iteratorRecord, ts.createLiteral(count)]
+            : [iteratorRecord]), location);
+    }
+    ts.createReadHelper = createReadHelper;
+    var spreadHelper = {
+        name: "typescript:spread",
+        scoped: false,
+        text: "\n            var __spread = (this && this.__spread) || function () {\n                for (var ar = [], i = 0; i < arguments.length; i++) ar = ar.concat(__read(arguments[i]));\n                return ar;\n            };"
+    };
+    function createSpreadHelper(context, argumentList, location) {
+        context.requestEmitHelper(readHelper);
+        context.requestEmitHelper(spreadHelper);
+        return ts.setTextRange(ts.createCall(getHelperName("__spread"), 
+        /*typeArguments*/ undefined, argumentList), location);
+    }
+    ts.createSpreadHelper = createSpreadHelper;
+    // Utilities
+    function createForOfBindingStatement(node, boundValue) {
+        if (ts.isVariableDeclarationList(node)) {
+            var firstDeclaration = ts.firstOrUndefined(node.declarations);
+            var updatedDeclaration = ts.updateVariableDeclaration(firstDeclaration, firstDeclaration.name, 
+            /*typeNode*/ undefined, boundValue);
+            return ts.setTextRange(ts.createVariableStatement(
+            /*modifiers*/ undefined, ts.updateVariableDeclarationList(node, [updatedDeclaration])), 
+            /*location*/ node);
         }
-        function writeVariableStatement(node) {
-            emitJsDocComments(node);
-            emitModuleElementDeclarationFlags(node);
-            if (ts.isLet(node.declarationList)) {
-                write("let ");
-            }
-            else if (ts.isConst(node.declarationList)) {
-                write("const ");
-            }
-            else {
-                write("var ");
-            }
-            emitCommaList(node.declarationList.declarations, emitVariableDeclaration, resolver.isDeclarationVisible);
-            write(";");
-            writeLine();
+        else {
+            var updatedExpression = ts.setTextRange(ts.createAssignment(node, boundValue), /*location*/ node);
+            return ts.setTextRange(ts.createStatement(updatedExpression), /*location*/ node);
         }
-        function emitAccessorDeclaration(node) {
-            if (ts.hasDynamicName(node)) {
-                return;
-            }
-            var accessors = ts.getAllAccessorDeclarations(node.parent.members, node);
-            var accessorWithTypeAnnotation;
-            if (node === accessors.firstAccessor) {
-                emitJsDocComments(accessors.getAccessor);
-                emitJsDocComments(accessors.setAccessor);
-                emitClassMemberDeclarationFlags(ts.getModifierFlags(node) | (accessors.setAccessor ? 0 : 64 /* Readonly */));
-                writeTextOfNode(currentText, node.name);
-                if (!ts.hasModifier(node, 8 /* Private */)) {
-                    accessorWithTypeAnnotation = node;
-                    var type = getTypeAnnotationFromAccessor(node);
-                    if (!type) {
-                        // couldn't get type for the first accessor, try the another one
-                        var anotherAccessor = node.kind === 149 /* GetAccessor */ ? accessors.setAccessor : accessors.getAccessor;
-                        type = getTypeAnnotationFromAccessor(anotherAccessor);
-                        if (type) {
-                            accessorWithTypeAnnotation = anotherAccessor;
-                        }
-                    }
-                    writeTypeOfDeclaration(node, type, getAccessorDeclarationTypeVisibilityError);
-                }
-                write(";");
-                writeLine();
-            }
-            function getTypeAnnotationFromAccessor(accessor) {
-                if (accessor) {
-                    return accessor.kind === 149 /* GetAccessor */
-                        ? accessor.type // Getter - return type
-                        : accessor.parameters.length > 0
-                            ? accessor.parameters[0].type // Setter parameter type
-                            : undefined;
+    }
+    ts.createForOfBindingStatement = createForOfBindingStatement;
+    function insertLeadingStatement(dest, source) {
+        if (ts.isBlock(dest)) {
+            return ts.updateBlock(dest, ts.setTextRange(ts.createNodeArray([source].concat(dest.statements)), dest.statements));
+        }
+        else {
+            return ts.createBlock(ts.createNodeArray([dest, source]), /*multiLine*/ true);
+        }
+    }
+    ts.insertLeadingStatement = insertLeadingStatement;
+    function restoreEnclosingLabel(node, outermostLabeledStatement, afterRestoreLabelCallback) {
+        if (!outermostLabeledStatement) {
+            return node;
+        }
+        var updated = ts.updateLabel(outermostLabeledStatement, outermostLabeledStatement.label, outermostLabeledStatement.statement.kind === 222 /* LabeledStatement */
+            ? restoreEnclosingLabel(node, outermostLabeledStatement.statement)
+            : node);
+        if (afterRestoreLabelCallback) {
+            afterRestoreLabelCallback(outermostLabeledStatement);
+        }
+        return updated;
+    }
+    ts.restoreEnclosingLabel = restoreEnclosingLabel;
+    function shouldBeCapturedInTempVariable(node, cacheIdentifiers) {
+        var target = skipParentheses(node);
+        switch (target.kind) {
+            case 71 /* Identifier */:
+                return cacheIdentifiers;
+            case 99 /* ThisKeyword */:
+            case 8 /* NumericLiteral */:
+            case 9 /* StringLiteral */:
+                return false;
+            case 177 /* ArrayLiteralExpression */:
+                var elements = target.elements;
+                if (elements.length === 0) {
+                    return false;
                 }
-            }
-            function getAccessorDeclarationTypeVisibilityError(symbolAccessibilityResult) {
-                var diagnosticMessage;
-                if (accessorWithTypeAnnotation.kind === 150 /* SetAccessor */) {
-                    // Setters have to have type named and cannot infer it so, the type should always be named
-                    if (ts.hasModifier(accessorWithTypeAnnotation.parent, 32 /* Static */)) {
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_private_name_1;
+                return true;
+            case 178 /* ObjectLiteralExpression */:
+                return target.properties.length > 0;
+            default:
+                return true;
+        }
+    }
+    function createCallBinding(expression, recordTempVariable, languageVersion, cacheIdentifiers) {
+        var callee = skipOuterExpressions(expression, 7 /* All */);
+        var thisArg;
+        var target;
+        if (ts.isSuperProperty(callee)) {
+            thisArg = ts.createThis();
+            target = callee;
+        }
+        else if (callee.kind === 97 /* SuperKeyword */) {
+            thisArg = ts.createThis();
+            target = languageVersion < 2 /* ES2015 */
+                ? ts.setTextRange(ts.createIdentifier("_super"), callee)
+                : callee;
+        }
+        else if (ts.getEmitFlags(callee) & 4096 /* HelperName */) {
+            thisArg = ts.createVoidZero();
+            target = parenthesizeForAccess(callee);
+        }
+        else {
+            switch (callee.kind) {
+                case 179 /* PropertyAccessExpression */: {
+                    if (shouldBeCapturedInTempVariable(callee.expression, cacheIdentifiers)) {
+                        // for `a.b()` target is `(_a = a).b` and thisArg is `_a`
+                        thisArg = ts.createTempVariable(recordTempVariable);
+                        target = ts.createPropertyAccess(ts.setTextRange(ts.createAssignment(thisArg, callee.expression), callee.expression), callee.name);
+                        ts.setTextRange(target, callee);
                     }
                     else {
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_private_name_1;
+                        thisArg = callee.expression;
+                        target = callee;
                     }
-                    return {
-                        diagnosticMessage: diagnosticMessage,
-                        errorNode: accessorWithTypeAnnotation.parameters[0],
-                        // TODO(jfreeman): Investigate why we are passing node.name instead of node.parameters[0].name
-                        typeName: accessorWithTypeAnnotation.name
-                    };
+                    break;
                 }
-                else {
-                    if (ts.hasModifier(accessorWithTypeAnnotation, 32 /* Static */)) {
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
-                                ts.Diagnostics.Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
-                                ts.Diagnostics.Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
-                            ts.Diagnostics.Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_private_name_0;
+                case 180 /* ElementAccessExpression */: {
+                    if (shouldBeCapturedInTempVariable(callee.expression, cacheIdentifiers)) {
+                        // for `a[b]()` target is `(_a = a)[b]` and thisArg is `_a`
+                        thisArg = ts.createTempVariable(recordTempVariable);
+                        target = ts.createElementAccess(ts.setTextRange(ts.createAssignment(thisArg, callee.expression), callee.expression), callee.argumentExpression);
+                        ts.setTextRange(target, callee);
                     }
                     else {
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
-                                ts.Diagnostics.Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
-                                ts.Diagnostics.Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
-                            ts.Diagnostics.Return_type_of_public_property_getter_from_exported_class_has_or_is_using_private_name_0;
+                        thisArg = callee.expression;
+                        target = callee;
                     }
-                    return {
-                        diagnosticMessage: diagnosticMessage,
-                        errorNode: accessorWithTypeAnnotation.name,
-                        typeName: undefined
-                    };
+                    break;
+                }
+                default: {
+                    // for `a()` target is `a` and thisArg is `void 0`
+                    thisArg = ts.createVoidZero();
+                    target = parenthesizeForAccess(expression);
+                    break;
                 }
             }
         }
-        function writeFunctionDeclaration(node) {
-            if (ts.hasDynamicName(node)) {
-                return;
+        return { target: target, thisArg: thisArg };
+    }
+    ts.createCallBinding = createCallBinding;
+    function inlineExpressions(expressions) {
+        // Avoid deeply nested comma expressions as traversing them during emit can result in "Maximum call
+        // stack size exceeded" errors.
+        return expressions.length > 10
+            ? ts.createCommaList(expressions)
+            : ts.reduceLeft(expressions, ts.createComma);
+    }
+    ts.inlineExpressions = inlineExpressions;
+    function createExpressionFromEntityName(node) {
+        if (ts.isQualifiedName(node)) {
+            var left = createExpressionFromEntityName(node.left);
+            var right = ts.getMutableClone(node.right);
+            return ts.setTextRange(ts.createPropertyAccess(left, right), node);
+        }
+        else {
+            return ts.getMutableClone(node);
+        }
+    }
+    ts.createExpressionFromEntityName = createExpressionFromEntityName;
+    function createExpressionForPropertyName(memberName) {
+        if (ts.isIdentifier(memberName)) {
+            return ts.createLiteral(memberName);
+        }
+        else if (ts.isComputedPropertyName(memberName)) {
+            return ts.getMutableClone(memberName.expression);
+        }
+        else {
+            return ts.getMutableClone(memberName);
+        }
+    }
+    ts.createExpressionForPropertyName = createExpressionForPropertyName;
+    function createExpressionForObjectLiteralElementLike(node, property, receiver) {
+        switch (property.kind) {
+            case 153 /* GetAccessor */:
+            case 154 /* SetAccessor */:
+                return createExpressionForAccessorDeclaration(node.properties, property, receiver, node.multiLine);
+            case 261 /* PropertyAssignment */:
+                return createExpressionForPropertyAssignment(property, receiver);
+            case 262 /* ShorthandPropertyAssignment */:
+                return createExpressionForShorthandPropertyAssignment(property, receiver);
+            case 151 /* MethodDeclaration */:
+                return createExpressionForMethodDeclaration(property, receiver);
+        }
+    }
+    ts.createExpressionForObjectLiteralElementLike = createExpressionForObjectLiteralElementLike;
+    function createExpressionForAccessorDeclaration(properties, property, receiver, multiLine) {
+        var _a = ts.getAllAccessorDeclarations(properties, property), firstAccessor = _a.firstAccessor, getAccessor = _a.getAccessor, setAccessor = _a.setAccessor;
+        if (property === firstAccessor) {
+            var properties_8 = [];
+            if (getAccessor) {
+                var getterFunction = ts.createFunctionExpression(getAccessor.modifiers, 
+                /*asteriskToken*/ undefined, 
+                /*name*/ undefined, 
+                /*typeParameters*/ undefined, getAccessor.parameters, 
+                /*type*/ undefined, getAccessor.body);
+                ts.setTextRange(getterFunction, getAccessor);
+                ts.setOriginalNode(getterFunction, getAccessor);
+                var getter = ts.createPropertyAssignment("get", getterFunction);
+                properties_8.push(getter);
             }
-            // If we are emitting Method/Constructor it isn't moduleElement and hence already determined to be emitting
-            // so no need to verify if the declaration is visible
-            if (!resolver.isImplementationOfOverload(node)) {
-                emitJsDocComments(node);
-                if (node.kind === 220 /* FunctionDeclaration */) {
-                    emitModuleElementDeclarationFlags(node);
-                }
-                else if (node.kind === 147 /* MethodDeclaration */ || node.kind === 148 /* Constructor */) {
-                    emitClassMemberDeclarationFlags(ts.getModifierFlags(node));
-                }
-                if (node.kind === 220 /* FunctionDeclaration */) {
-                    write("function ");
-                    writeTextOfNode(currentText, node.name);
-                }
-                else if (node.kind === 148 /* Constructor */) {
-                    write("constructor");
-                }
-                else {
-                    writeTextOfNode(currentText, node.name);
-                    if (ts.hasQuestionToken(node)) {
-                        write("?");
-                    }
-                }
-                emitSignatureDeclaration(node);
+            if (setAccessor) {
+                var setterFunction = ts.createFunctionExpression(setAccessor.modifiers, 
+                /*asteriskToken*/ undefined, 
+                /*name*/ undefined, 
+                /*typeParameters*/ undefined, setAccessor.parameters, 
+                /*type*/ undefined, setAccessor.body);
+                ts.setTextRange(setterFunction, setAccessor);
+                ts.setOriginalNode(setterFunction, setAccessor);
+                var setter = ts.createPropertyAssignment("set", setterFunction);
+                properties_8.push(setter);
             }
+            properties_8.push(ts.createPropertyAssignment("enumerable", ts.createTrue()));
+            properties_8.push(ts.createPropertyAssignment("configurable", ts.createTrue()));
+            var expression = ts.setTextRange(ts.createCall(ts.createPropertyAccess(ts.createIdentifier("Object"), "defineProperty"), 
+            /*typeArguments*/ undefined, [
+                receiver,
+                createExpressionForPropertyName(property.name),
+                ts.createObjectLiteral(properties_8, multiLine)
+            ]), 
+            /*location*/ firstAccessor);
+            return ts.aggregateTransformFlags(expression);
         }
-        function emitSignatureDeclarationWithJsDocComments(node) {
-            emitJsDocComments(node);
-            emitSignatureDeclaration(node);
+        return undefined;
+    }
+    function createExpressionForPropertyAssignment(property, receiver) {
+        return ts.aggregateTransformFlags(ts.setOriginalNode(ts.setTextRange(ts.createAssignment(createMemberAccessForPropertyName(receiver, property.name, /*location*/ property.name), property.initializer), property), property));
+    }
+    function createExpressionForShorthandPropertyAssignment(property, receiver) {
+        return ts.aggregateTransformFlags(ts.setOriginalNode(ts.setTextRange(ts.createAssignment(createMemberAccessForPropertyName(receiver, property.name, /*location*/ property.name), ts.getSynthesizedClone(property.name)), 
+        /*location*/ property), 
+        /*original*/ property));
+    }
+    function createExpressionForMethodDeclaration(method, receiver) {
+        return ts.aggregateTransformFlags(ts.setOriginalNode(ts.setTextRange(ts.createAssignment(createMemberAccessForPropertyName(receiver, method.name, /*location*/ method.name), ts.setOriginalNode(ts.setTextRange(ts.createFunctionExpression(method.modifiers, method.asteriskToken, 
+        /*name*/ undefined, 
+        /*typeParameters*/ undefined, method.parameters, 
+        /*type*/ undefined, method.body), 
+        /*location*/ method), 
+        /*original*/ method)), 
+        /*location*/ method), 
+        /*original*/ method));
+    }
+    /**
+     * Gets the internal name of a declaration. This is primarily used for declarations that can be
+     * referred to by name in the body of an ES5 class function body. An internal name will *never*
+     * be prefixed with an module or namespace export modifier like "exports." when emitted as an
+     * expression. An internal name will also *never* be renamed due to a collision with a block
+     * scoped variable.
+     *
+     * @param node The declaration.
+     * @param allowComments A value indicating whether comments may be emitted for the name.
+     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
+     */
+    function getInternalName(node, allowComments, allowSourceMaps) {
+        return getName(node, allowComments, allowSourceMaps, 16384 /* LocalName */ | 32768 /* InternalName */);
+    }
+    ts.getInternalName = getInternalName;
+    /**
+     * Gets whether an identifier should only be referred to by its internal name.
+     */
+    function isInternalName(node) {
+        return (ts.getEmitFlags(node) & 32768 /* InternalName */) !== 0;
+    }
+    ts.isInternalName = isInternalName;
+    /**
+     * Gets the local name of a declaration. This is primarily used for declarations that can be
+     * referred to by name in the declaration's immediate scope (classes, enums, namespaces). A
+     * local name will *never* be prefixed with an module or namespace export modifier like
+     * "exports." when emitted as an expression.
+     *
+     * @param node The declaration.
+     * @param allowComments A value indicating whether comments may be emitted for the name.
+     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
+     */
+    function getLocalName(node, allowComments, allowSourceMaps) {
+        return getName(node, allowComments, allowSourceMaps, 16384 /* LocalName */);
+    }
+    ts.getLocalName = getLocalName;
+    /**
+     * Gets whether an identifier should only be referred to by its local name.
+     */
+    function isLocalName(node) {
+        return (ts.getEmitFlags(node) & 16384 /* LocalName */) !== 0;
+    }
+    ts.isLocalName = isLocalName;
+    /**
+     * Gets the export name of a declaration. This is primarily used for declarations that can be
+     * referred to by name in the declaration's immediate scope (classes, enums, namespaces). An
+     * export name will *always* be prefixed with an module or namespace export modifier like
+     * `"exports."` when emitted as an expression if the name points to an exported symbol.
+     *
+     * @param node The declaration.
+     * @param allowComments A value indicating whether comments may be emitted for the name.
+     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
+     */
+    function getExportName(node, allowComments, allowSourceMaps) {
+        return getName(node, allowComments, allowSourceMaps, 8192 /* ExportName */);
+    }
+    ts.getExportName = getExportName;
+    /**
+     * Gets whether an identifier should only be referred to by its export representation if the
+     * name points to an exported symbol.
+     */
+    function isExportName(node) {
+        return (ts.getEmitFlags(node) & 8192 /* ExportName */) !== 0;
+    }
+    ts.isExportName = isExportName;
+    /**
+     * Gets the name of a declaration for use in declarations.
+     *
+     * @param node The declaration.
+     * @param allowComments A value indicating whether comments may be emitted for the name.
+     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
+     */
+    function getDeclarationName(node, allowComments, allowSourceMaps) {
+        return getName(node, allowComments, allowSourceMaps);
+    }
+    ts.getDeclarationName = getDeclarationName;
+    function getName(node, allowComments, allowSourceMaps, emitFlags) {
+        var nodeName = ts.getNameOfDeclaration(node);
+        if (nodeName && ts.isIdentifier(nodeName) && !ts.isGeneratedIdentifier(nodeName)) {
+            var name_40 = ts.getMutableClone(nodeName);
+            emitFlags |= ts.getEmitFlags(nodeName);
+            if (!allowSourceMaps)
+                emitFlags |= 48 /* NoSourceMap */;
+            if (!allowComments)
+                emitFlags |= 1536 /* NoComments */;
+            if (emitFlags)
+                ts.setEmitFlags(name_40, emitFlags);
+            return name_40;
+        }
+        return ts.getGeneratedNameForNode(node);
+    }
+    /**
+     * Gets the exported name of a declaration for use in expressions.
+     *
+     * An exported name will *always* be prefixed with an module or namespace export modifier like
+     * "exports." if the name points to an exported symbol.
+     *
+     * @param ns The namespace identifier.
+     * @param node The declaration.
+     * @param allowComments A value indicating whether comments may be emitted for the name.
+     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
+     */
+    function getExternalModuleOrNamespaceExportName(ns, node, allowComments, allowSourceMaps) {
+        if (ns && ts.hasModifier(node, 1 /* Export */)) {
+            return getNamespaceMemberName(ns, getName(node), allowComments, allowSourceMaps);
         }
-        function emitSignatureDeclaration(node) {
-            var prevEnclosingDeclaration = enclosingDeclaration;
-            enclosingDeclaration = node;
-            var closeParenthesizedFunctionType = false;
-            if (node.kind === 153 /* IndexSignature */) {
-                // Index signature can have readonly modifier
-                emitClassMemberDeclarationFlags(ts.getModifierFlags(node));
-                write("[");
+        return getExportName(node, allowComments, allowSourceMaps);
+    }
+    ts.getExternalModuleOrNamespaceExportName = getExternalModuleOrNamespaceExportName;
+    /**
+     * Gets a namespace-qualified name for use in expressions.
+     *
+     * @param ns The namespace identifier.
+     * @param name The name.
+     * @param allowComments A value indicating whether comments may be emitted for the name.
+     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
+     */
+    function getNamespaceMemberName(ns, name, allowComments, allowSourceMaps) {
+        var qualifiedName = ts.createPropertyAccess(ns, ts.nodeIsSynthesized(name) ? name : ts.getSynthesizedClone(name));
+        ts.setTextRange(qualifiedName, name);
+        var emitFlags;
+        if (!allowSourceMaps)
+            emitFlags |= 48 /* NoSourceMap */;
+        if (!allowComments)
+            emitFlags |= 1536 /* NoComments */;
+        if (emitFlags)
+            ts.setEmitFlags(qualifiedName, emitFlags);
+        return qualifiedName;
+    }
+    ts.getNamespaceMemberName = getNamespaceMemberName;
+    function convertToFunctionBody(node, multiLine) {
+        return ts.isBlock(node) ? node : ts.setTextRange(ts.createBlock([ts.setTextRange(ts.createReturn(node), node)], multiLine), node);
+    }
+    ts.convertToFunctionBody = convertToFunctionBody;
+    function convertFunctionDeclarationToExpression(node) {
+        ts.Debug.assert(!!node.body);
+        var updated = ts.createFunctionExpression(node.modifiers, node.asteriskToken, node.name, node.typeParameters, node.parameters, node.type, node.body);
+        ts.setOriginalNode(updated, node);
+        ts.setTextRange(updated, node);
+        if (node.startsOnNewLine) {
+            updated.startsOnNewLine = true;
+        }
+        ts.aggregateTransformFlags(updated);
+        return updated;
+    }
+    ts.convertFunctionDeclarationToExpression = convertFunctionDeclarationToExpression;
+    function isUseStrictPrologue(node) {
+        return node.expression.text === "use strict";
+    }
+    /**
+     * Add any necessary prologue-directives into target statement-array.
+     * The function needs to be called during each transformation step.
+     * This function needs to be called whenever we transform the statement
+     * list of a source file, namespace, or function-like body.
+     *
+     * @param target: result statements array
+     * @param source: origin statements array
+     * @param ensureUseStrict: boolean determining whether the function need to add prologue-directives
+     * @param visitor: Optional callback used to visit any custom prologue directives.
+     */
+    function addPrologue(target, source, ensureUseStrict, visitor) {
+        var offset = addStandardPrologue(target, source, ensureUseStrict);
+        return addCustomPrologue(target, source, offset, visitor);
+    }
+    ts.addPrologue = addPrologue;
+    /**
+     * Add just the standard (string-expression) prologue-directives into target statement-array.
+     * The function needs to be called during each transformation step.
+     * This function needs to be called whenever we transform the statement
+     * list of a source file, namespace, or function-like body.
+     */
+    function addStandardPrologue(target, source, ensureUseStrict) {
+        ts.Debug.assert(target.length === 0, "Prologue directives should be at the first statement in the target statements array");
+        var foundUseStrict = false;
+        var statementOffset = 0;
+        var numStatements = source.length;
+        while (statementOffset < numStatements) {
+            var statement = source[statementOffset];
+            if (ts.isPrologueDirective(statement)) {
+                if (isUseStrictPrologue(statement)) {
+                    foundUseStrict = true;
+                }
+                target.push(statement);
             }
             else {
-                // Construct signature or constructor type write new Signature
-                if (node.kind === 152 /* ConstructSignature */ || node.kind === 157 /* ConstructorType */) {
-                    write("new ");
-                }
-                else if (node.kind === 156 /* FunctionType */) {
-                    var currentOutput = writer.getText();
-                    // Do not generate incorrect type when function type with type parameters is type argument
-                    // This could happen if user used space between two '<' making it error free
-                    // e.g var x: A< <Tany>(a: Tany)=>Tany>;
-                    if (node.typeParameters && currentOutput.charAt(currentOutput.length - 1) === "<") {
-                        closeParenthesizedFunctionType = true;
-                        write("(");
-                    }
-                }
-                emitTypeParameters(node.typeParameters);
-                write("(");
+                break;
             }
-            // Parameters
-            emitCommaList(node.parameters, emitParameterDeclaration);
-            if (node.kind === 153 /* IndexSignature */) {
-                write("]");
+            statementOffset++;
+        }
+        if (ensureUseStrict && !foundUseStrict) {
+            target.push(startOnNewLine(ts.createStatement(ts.createLiteral("use strict"))));
+        }
+        return statementOffset;
+    }
+    ts.addStandardPrologue = addStandardPrologue;
+    /**
+     * Add just the custom prologue-directives into target statement-array.
+     * The function needs to be called during each transformation step.
+     * This function needs to be called whenever we transform the statement
+     * list of a source file, namespace, or function-like body.
+     */
+    function addCustomPrologue(target, source, statementOffset, visitor) {
+        var numStatements = source.length;
+        while (statementOffset < numStatements) {
+            var statement = source[statementOffset];
+            if (ts.getEmitFlags(statement) & 1048576 /* CustomPrologue */) {
+                target.push(visitor ? ts.visitNode(statement, visitor, ts.isStatement) : statement);
             }
             else {
-                write(")");
+                break;
             }
-            // If this is not a constructor and is not private, emit the return type
-            var isFunctionTypeOrConstructorType = node.kind === 156 /* FunctionType */ || node.kind === 157 /* ConstructorType */;
-            if (isFunctionTypeOrConstructorType || node.parent.kind === 159 /* TypeLiteral */) {
-                // Emit type literal signature return type only if specified
-                if (node.type) {
-                    write(isFunctionTypeOrConstructorType ? " => " : ": ");
-                    emitType(node.type);
+            statementOffset++;
+        }
+        return statementOffset;
+    }
+    ts.addCustomPrologue = addCustomPrologue;
+    function startsWithUseStrict(statements) {
+        var firstStatement = ts.firstOrUndefined(statements);
+        return firstStatement !== undefined
+            && ts.isPrologueDirective(firstStatement)
+            && isUseStrictPrologue(firstStatement);
+    }
+    ts.startsWithUseStrict = startsWithUseStrict;
+    /**
+     * Ensures "use strict" directive is added
+     *
+     * @param statements An array of statements
+     */
+    function ensureUseStrict(statements) {
+        var foundUseStrict = false;
+        for (var _i = 0, statements_3 = statements; _i < statements_3.length; _i++) {
+            var statement = statements_3[_i];
+            if (ts.isPrologueDirective(statement)) {
+                if (isUseStrictPrologue(statement)) {
+                    foundUseStrict = true;
+                    break;
                 }
             }
-            else if (node.kind !== 148 /* Constructor */ && !ts.hasModifier(node, 8 /* Private */)) {
-                writeReturnTypeAtSignature(node, getReturnTypeVisibilityError);
-            }
-            enclosingDeclaration = prevEnclosingDeclaration;
-            if (!isFunctionTypeOrConstructorType) {
-                write(";");
-                writeLine();
-            }
-            else if (closeParenthesizedFunctionType) {
-                write(")");
+            else {
+                break;
             }
-            function getReturnTypeVisibilityError(symbolAccessibilityResult) {
-                var diagnosticMessage;
-                switch (node.kind) {
-                    case 152 /* ConstructSignature */:
-                        // Interfaces cannot have return types that cannot be named
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
-                            ts.Diagnostics.Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_0;
-                        break;
-                    case 151 /* CallSignature */:
-                        // Interfaces cannot have return types that cannot be named
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Return_type_of_call_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
-                            ts.Diagnostics.Return_type_of_call_signature_from_exported_interface_has_or_is_using_private_name_0;
-                        break;
-                    case 153 /* IndexSignature */:
-                        // Interfaces cannot have return types that cannot be named
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Return_type_of_index_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
-                            ts.Diagnostics.Return_type_of_index_signature_from_exported_interface_has_or_is_using_private_name_0;
-                        break;
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                        if (ts.hasModifier(node, 32 /* Static */)) {
-                            diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                                symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
-                                    ts.Diagnostics.Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
-                                    ts.Diagnostics.Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
-                                ts.Diagnostics.Return_type_of_public_static_method_from_exported_class_has_or_is_using_private_name_0;
-                        }
-                        else if (node.parent.kind === 221 /* ClassDeclaration */) {
-                            diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                                symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
-                                    ts.Diagnostics.Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
-                                    ts.Diagnostics.Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
-                                ts.Diagnostics.Return_type_of_public_method_from_exported_class_has_or_is_using_private_name_0;
+        }
+        if (!foundUseStrict) {
+            return ts.setTextRange(ts.createNodeArray([
+                startOnNewLine(ts.createStatement(ts.createLiteral("use strict")))
+            ].concat(statements)), statements);
+        }
+        return statements;
+    }
+    ts.ensureUseStrict = ensureUseStrict;
+    /**
+     * Wraps the operand to a BinaryExpression in parentheses if they are needed to preserve the intended
+     * order of operations.
+     *
+     * @param binaryOperator The operator for the BinaryExpression.
+     * @param operand The operand for the BinaryExpression.
+     * @param isLeftSideOfBinary A value indicating whether the operand is the left side of the
+     *                           BinaryExpression.
+     */
+    function parenthesizeBinaryOperand(binaryOperator, operand, isLeftSideOfBinary, leftOperand) {
+        var skipped = ts.skipPartiallyEmittedExpressions(operand);
+        // If the resulting expression is already parenthesized, we do not need to do any further processing.
+        if (skipped.kind === 185 /* ParenthesizedExpression */) {
+            return operand;
+        }
+        return binaryOperandNeedsParentheses(binaryOperator, operand, isLeftSideOfBinary, leftOperand)
+            ? ts.createParen(operand)
+            : operand;
+    }
+    ts.parenthesizeBinaryOperand = parenthesizeBinaryOperand;
+    /**
+     * Determines whether the operand to a BinaryExpression needs to be parenthesized.
+     *
+     * @param binaryOperator The operator for the BinaryExpression.
+     * @param operand The operand for the BinaryExpression.
+     * @param isLeftSideOfBinary A value indicating whether the operand is the left side of the
+     *                           BinaryExpression.
+     */
+    function binaryOperandNeedsParentheses(binaryOperator, operand, isLeftSideOfBinary, leftOperand) {
+        // If the operand has lower precedence, then it needs to be parenthesized to preserve the
+        // intent of the expression. For example, if the operand is `a + b` and the operator is
+        // `*`, then we need to parenthesize the operand to preserve the intended order of
+        // operations: `(a + b) * x`.
+        //
+        // If the operand has higher precedence, then it does not need to be parenthesized. For
+        // example, if the operand is `a * b` and the operator is `+`, then we do not need to
+        // parenthesize to preserve the intended order of operations: `a * b + x`.
+        //
+        // If the operand has the same precedence, then we need to check the associativity of
+        // the operator based on whether this is the left or right operand of the expression.
+        //
+        // For example, if `a / d` is on the right of operator `*`, we need to parenthesize
+        // to preserve the intended order of operations: `x * (a / d)`
+        //
+        // If `a ** d` is on the left of operator `**`, we need to parenthesize to preserve
+        // the intended order of operations: `(a ** b) ** c`
+        var binaryOperatorPrecedence = ts.getOperatorPrecedence(194 /* BinaryExpression */, binaryOperator);
+        var binaryOperatorAssociativity = ts.getOperatorAssociativity(194 /* BinaryExpression */, binaryOperator);
+        var emittedOperand = ts.skipPartiallyEmittedExpressions(operand);
+        var operandPrecedence = ts.getExpressionPrecedence(emittedOperand);
+        switch (ts.compareValues(operandPrecedence, binaryOperatorPrecedence)) {
+            case -1 /* LessThan */:
+                // If the operand is the right side of a right-associative binary operation
+                // and is a yield expression, then we do not need parentheses.
+                if (!isLeftSideOfBinary
+                    && binaryOperatorAssociativity === 1 /* Right */
+                    && operand.kind === 197 /* YieldExpression */) {
+                    return false;
+                }
+                return true;
+            case 1 /* GreaterThan */:
+                return false;
+            case 0 /* EqualTo */:
+                if (isLeftSideOfBinary) {
+                    // No need to parenthesize the left operand when the binary operator is
+                    // left associative:
+                    //  (a*b)/x    ->  a*b/x
+                    //  (a**b)/x   ->  a**b/x
+                    //
+                    // Parentheses are needed for the left operand when the binary operator is
+                    // right associative:
+                    //  (a/b)**x   ->  (a/b)**x
+                    //  (a**b)**x  ->  (a**b)**x
+                    return binaryOperatorAssociativity === 1 /* Right */;
+                }
+                else {
+                    if (ts.isBinaryExpression(emittedOperand)
+                        && emittedOperand.operatorToken.kind === binaryOperator) {
+                        // No need to parenthesize the right operand when the binary operator and
+                        // operand are the same and one of the following:
+                        //  x*(a*b)     => x*a*b
+                        //  x|(a|b)     => x|a|b
+                        //  x&(a&b)     => x&a&b
+                        //  x^(a^b)     => x^a^b
+                        if (operatorHasAssociativeProperty(binaryOperator)) {
+                            return false;
                         }
-                        else {
-                            // Interfaces cannot have return types that cannot be named
-                            diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                                ts.Diagnostics.Return_type_of_method_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
-                                ts.Diagnostics.Return_type_of_method_from_exported_interface_has_or_is_using_private_name_0;
+                        // No need to parenthesize the right operand when the binary operator
+                        // is plus (+) if both the left and right operands consist solely of either
+                        // literals of the same kind or binary plus (+) expressions for literals of
+                        // the same kind (recursively).
+                        //  "a"+(1+2)       => "a"+(1+2)
+                        //  "a"+("b"+"c")   => "a"+"b"+"c"
+                        if (binaryOperator === 37 /* PlusToken */) {
+                            var leftKind = leftOperand ? getLiteralKindOfBinaryPlusOperand(leftOperand) : 0 /* Unknown */;
+                            if (ts.isLiteralKind(leftKind) && leftKind === getLiteralKindOfBinaryPlusOperand(emittedOperand)) {
+                                return false;
+                            }
                         }
-                        break;
-                    case 220 /* FunctionDeclaration */:
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
-                                ts.Diagnostics.Return_type_of_exported_function_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
-                                ts.Diagnostics.Return_type_of_exported_function_has_or_is_using_name_0_from_private_module_1 :
-                            ts.Diagnostics.Return_type_of_exported_function_has_or_is_using_private_name_0;
-                        break;
-                    default:
-                        ts.Debug.fail("This is unknown kind for signature: " + node.kind);
+                    }
+                    // No need to parenthesize the right operand when the operand is right
+                    // associative:
+                    //  x/(a**b)    -> x/a**b
+                    //  x**(a**b)   -> x**a**b
+                    //
+                    // Parentheses are needed for the right operand when the operand is left
+                    // associative:
+                    //  x/(a*b)     -> x/(a*b)
+                    //  x**(a/b)    -> x**(a/b)
+                    var operandAssociativity = ts.getExpressionAssociativity(emittedOperand);
+                    return operandAssociativity === 0 /* Left */;
+                }
+        }
+    }
+    /**
+     * Determines whether a binary operator is mathematically associative.
+     *
+     * @param binaryOperator The binary operator.
+     */
+    function operatorHasAssociativeProperty(binaryOperator) {
+        // The following operators are associative in JavaScript:
+        //  (a*b)*c     -> a*(b*c)  -> a*b*c
+        //  (a|b)|c     -> a|(b|c)  -> a|b|c
+        //  (a&b)&c     -> a&(b&c)  -> a&b&c
+        //  (a^b)^c     -> a^(b^c)  -> a^b^c
+        //
+        // While addition is associative in mathematics, JavaScript's `+` is not
+        // guaranteed to be associative as it is overloaded with string concatenation.
+        return binaryOperator === 39 /* AsteriskToken */
+            || binaryOperator === 49 /* BarToken */
+            || binaryOperator === 48 /* AmpersandToken */
+            || binaryOperator === 50 /* CaretToken */;
+    }
+    /**
+     * This function determines whether an expression consists of a homogeneous set of
+     * literal expressions or binary plus expressions that all share the same literal kind.
+     * It is used to determine whether the right-hand operand of a binary plus expression can be
+     * emitted without parentheses.
+     */
+    function getLiteralKindOfBinaryPlusOperand(node) {
+        node = ts.skipPartiallyEmittedExpressions(node);
+        if (ts.isLiteralKind(node.kind)) {
+            return node.kind;
+        }
+        if (node.kind === 194 /* BinaryExpression */ && node.operatorToken.kind === 37 /* PlusToken */) {
+            if (node.cachedLiteralKind !== undefined) {
+                return node.cachedLiteralKind;
+            }
+            var leftKind = getLiteralKindOfBinaryPlusOperand(node.left);
+            var literalKind = ts.isLiteralKind(leftKind)
+                && leftKind === getLiteralKindOfBinaryPlusOperand(node.right)
+                ? leftKind
+                : 0 /* Unknown */;
+            node.cachedLiteralKind = literalKind;
+            return literalKind;
+        }
+        return 0 /* Unknown */;
+    }
+    function parenthesizeForConditionalHead(condition) {
+        var conditionalPrecedence = ts.getOperatorPrecedence(195 /* ConditionalExpression */, 55 /* QuestionToken */);
+        var emittedCondition = ts.skipPartiallyEmittedExpressions(condition);
+        var conditionPrecedence = ts.getExpressionPrecedence(emittedCondition);
+        if (ts.compareValues(conditionPrecedence, conditionalPrecedence) === -1 /* LessThan */) {
+            return ts.createParen(condition);
+        }
+        return condition;
+    }
+    ts.parenthesizeForConditionalHead = parenthesizeForConditionalHead;
+    function parenthesizeSubexpressionOfConditionalExpression(e) {
+        // per ES grammar both 'whenTrue' and 'whenFalse' parts of conditional expression are assignment expressions
+        // so in case when comma expression is introduced as a part of previous transformations
+        // if should be wrapped in parens since comma operator has the lowest precedence
+        return e.kind === 194 /* BinaryExpression */ && e.operatorToken.kind === 26 /* CommaToken */
+            ? ts.createParen(e)
+            : e;
+    }
+    ts.parenthesizeSubexpressionOfConditionalExpression = parenthesizeSubexpressionOfConditionalExpression;
+    /**
+     * Wraps an expression in parentheses if it is needed in order to use the expression
+     * as the expression of a NewExpression node.
+     *
+     * @param expression The Expression node.
+     */
+    function parenthesizeForNew(expression) {
+        var emittedExpression = ts.skipPartiallyEmittedExpressions(expression);
+        switch (emittedExpression.kind) {
+            case 181 /* CallExpression */:
+                return ts.createParen(expression);
+            case 182 /* NewExpression */:
+                return emittedExpression.arguments
+                    ? expression
+                    : ts.createParen(expression);
+        }
+        return parenthesizeForAccess(expression);
+    }
+    ts.parenthesizeForNew = parenthesizeForNew;
+    /**
+     * Wraps an expression in parentheses if it is needed in order to use the expression for
+     * property or element access.
+     *
+     * @param expr The expression node.
+     */
+    function parenthesizeForAccess(expression) {
+        // isLeftHandSideExpression is almost the correct criterion for when it is not necessary
+        // to parenthesize the expression before a dot. The known exception is:
+        //
+        //    NewExpression:
+        //       new C.x        -> not the same as (new C).x
+        //
+        var emittedExpression = ts.skipPartiallyEmittedExpressions(expression);
+        if (ts.isLeftHandSideExpression(emittedExpression)
+            && (emittedExpression.kind !== 182 /* NewExpression */ || emittedExpression.arguments)) {
+            return expression;
+        }
+        return ts.setTextRange(ts.createParen(expression), expression);
+    }
+    ts.parenthesizeForAccess = parenthesizeForAccess;
+    function parenthesizePostfixOperand(operand) {
+        return ts.isLeftHandSideExpression(operand)
+            ? operand
+            : ts.setTextRange(ts.createParen(operand), operand);
+    }
+    ts.parenthesizePostfixOperand = parenthesizePostfixOperand;
+    function parenthesizePrefixOperand(operand) {
+        return ts.isUnaryExpression(operand)
+            ? operand
+            : ts.setTextRange(ts.createParen(operand), operand);
+    }
+    ts.parenthesizePrefixOperand = parenthesizePrefixOperand;
+    function parenthesizeListElements(elements) {
+        var result;
+        for (var i = 0; i < elements.length; i++) {
+            var element = parenthesizeExpressionForList(elements[i]);
+            if (result !== undefined || element !== elements[i]) {
+                if (result === undefined) {
+                    result = elements.slice(0, i);
                 }
-                return {
-                    diagnosticMessage: diagnosticMessage,
-                    errorNode: node.name || node
-                };
+                result.push(element);
             }
         }
-        function emitParameterDeclaration(node) {
-            increaseIndent();
-            emitJsDocComments(node);
-            if (node.dotDotDotToken) {
-                write("...");
-            }
-            if (ts.isBindingPattern(node.name)) {
-                // For bindingPattern, we can't simply writeTextOfNode from the source file
-                // because we want to omit the initializer and using writeTextOfNode will result in initializer get emitted.
-                // Therefore, we will have to recursively emit each element in the bindingPattern.
-                emitBindingPattern(node.name);
+        if (result !== undefined) {
+            return ts.setTextRange(ts.createNodeArray(result, elements.hasTrailingComma), elements);
+        }
+        return elements;
+    }
+    ts.parenthesizeListElements = parenthesizeListElements;
+    function parenthesizeExpressionForList(expression) {
+        var emittedExpression = ts.skipPartiallyEmittedExpressions(expression);
+        var expressionPrecedence = ts.getExpressionPrecedence(emittedExpression);
+        var commaPrecedence = ts.getOperatorPrecedence(194 /* BinaryExpression */, 26 /* CommaToken */);
+        return expressionPrecedence > commaPrecedence
+            ? expression
+            : ts.setTextRange(ts.createParen(expression), expression);
+    }
+    ts.parenthesizeExpressionForList = parenthesizeExpressionForList;
+    function parenthesizeExpressionForExpressionStatement(expression) {
+        var emittedExpression = ts.skipPartiallyEmittedExpressions(expression);
+        if (ts.isCallExpression(emittedExpression)) {
+            var callee = emittedExpression.expression;
+            var kind = ts.skipPartiallyEmittedExpressions(callee).kind;
+            if (kind === 186 /* FunctionExpression */ || kind === 187 /* ArrowFunction */) {
+                var mutableCall = ts.getMutableClone(emittedExpression);
+                mutableCall.expression = ts.setTextRange(ts.createParen(callee), callee);
+                return recreateOuterExpressions(expression, mutableCall, 4 /* PartiallyEmittedExpressions */);
             }
-            else {
-                writeTextOfNode(currentText, node.name);
+        }
+        else {
+            var leftmostExpressionKind = getLeftmostExpression(emittedExpression).kind;
+            if (leftmostExpressionKind === 178 /* ObjectLiteralExpression */ || leftmostExpressionKind === 186 /* FunctionExpression */) {
+                return ts.setTextRange(ts.createParen(expression), expression);
             }
-            if (resolver.isOptionalParameter(node)) {
-                write("?");
+        }
+        return expression;
+    }
+    ts.parenthesizeExpressionForExpressionStatement = parenthesizeExpressionForExpressionStatement;
+    function parenthesizeElementTypeMember(member) {
+        switch (member.kind) {
+            case 166 /* UnionType */:
+            case 167 /* IntersectionType */:
+            case 160 /* FunctionType */:
+            case 161 /* ConstructorType */:
+                return ts.createParenthesizedType(member);
+        }
+        return member;
+    }
+    ts.parenthesizeElementTypeMember = parenthesizeElementTypeMember;
+    function parenthesizeElementTypeMembers(members) {
+        return ts.createNodeArray(ts.sameMap(members, parenthesizeElementTypeMember));
+    }
+    ts.parenthesizeElementTypeMembers = parenthesizeElementTypeMembers;
+    function parenthesizeTypeParameters(typeParameters) {
+        if (ts.some(typeParameters)) {
+            var nodeArray = ts.createNodeArray();
+            for (var i = 0; i < typeParameters.length; ++i) {
+                var entry = typeParameters[i];
+                nodeArray.push(i === 0 && ts.isFunctionOrConstructorTypeNode(entry) && entry.typeParameters ?
+                    ts.createParenthesizedType(entry) :
+                    entry);
+            }
+            return nodeArray;
+        }
+    }
+    ts.parenthesizeTypeParameters = parenthesizeTypeParameters;
+    function getLeftmostExpression(node) {
+        while (true) {
+            switch (node.kind) {
+                case 193 /* PostfixUnaryExpression */:
+                    node = node.operand;
+                    continue;
+                case 194 /* BinaryExpression */:
+                    node = node.left;
+                    continue;
+                case 195 /* ConditionalExpression */:
+                    node = node.condition;
+                    continue;
+                case 181 /* CallExpression */:
+                case 180 /* ElementAccessExpression */:
+                case 179 /* PropertyAccessExpression */:
+                    node = node.expression;
+                    continue;
+                case 297 /* PartiallyEmittedExpression */:
+                    node = node.expression;
+                    continue;
             }
-            decreaseIndent();
-            if (node.parent.kind === 156 /* FunctionType */ ||
-                node.parent.kind === 157 /* ConstructorType */ ||
-                node.parent.parent.kind === 159 /* TypeLiteral */) {
-                emitTypeOfVariableDeclarationFromTypeLiteral(node);
+            return node;
+        }
+    }
+    function parenthesizeConciseBody(body) {
+        if (!ts.isBlock(body) && getLeftmostExpression(body).kind === 178 /* ObjectLiteralExpression */) {
+            return ts.setTextRange(ts.createParen(body), body);
+        }
+        return body;
+    }
+    ts.parenthesizeConciseBody = parenthesizeConciseBody;
+    var OuterExpressionKinds;
+    (function (OuterExpressionKinds) {
+        OuterExpressionKinds[OuterExpressionKinds["Parentheses"] = 1] = "Parentheses";
+        OuterExpressionKinds[OuterExpressionKinds["Assertions"] = 2] = "Assertions";
+        OuterExpressionKinds[OuterExpressionKinds["PartiallyEmittedExpressions"] = 4] = "PartiallyEmittedExpressions";
+        OuterExpressionKinds[OuterExpressionKinds["All"] = 7] = "All";
+    })(OuterExpressionKinds = ts.OuterExpressionKinds || (ts.OuterExpressionKinds = {}));
+    function isOuterExpression(node, kinds) {
+        if (kinds === void 0) { kinds = 7 /* All */; }
+        switch (node.kind) {
+            case 185 /* ParenthesizedExpression */:
+                return (kinds & 1 /* Parentheses */) !== 0;
+            case 184 /* TypeAssertionExpression */:
+            case 202 /* AsExpression */:
+            case 203 /* NonNullExpression */:
+                return (kinds & 2 /* Assertions */) !== 0;
+            case 297 /* PartiallyEmittedExpression */:
+                return (kinds & 4 /* PartiallyEmittedExpressions */) !== 0;
+        }
+        return false;
+    }
+    ts.isOuterExpression = isOuterExpression;
+    function skipOuterExpressions(node, kinds) {
+        if (kinds === void 0) { kinds = 7 /* All */; }
+        var previousNode;
+        do {
+            previousNode = node;
+            if (kinds & 1 /* Parentheses */) {
+                node = skipParentheses(node);
             }
-            else if (!ts.hasModifier(node.parent, 8 /* Private */)) {
-                writeTypeOfDeclaration(node, node.type, getParameterDeclarationTypeVisibilityError);
+            if (kinds & 2 /* Assertions */) {
+                node = skipAssertions(node);
             }
-            function getParameterDeclarationTypeVisibilityError(symbolAccessibilityResult) {
-                var diagnosticMessage = getParameterDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult);
-                return diagnosticMessage !== undefined ? {
-                    diagnosticMessage: diagnosticMessage,
-                    errorNode: node,
-                    typeName: node.name
-                } : undefined;
+            if (kinds & 4 /* PartiallyEmittedExpressions */) {
+                node = ts.skipPartiallyEmittedExpressions(node);
             }
-            function getParameterDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult) {
-                switch (node.parent.kind) {
-                    case 148 /* Constructor */:
-                        return symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
-                                ts.Diagnostics.Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
-                                ts.Diagnostics.Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Parameter_0_of_constructor_from_exported_class_has_or_is_using_private_name_1;
-                    case 152 /* ConstructSignature */:
-                        // Interfaces cannot have parameter types that cannot be named
-                        return symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1;
-                    case 151 /* CallSignature */:
-                        // Interfaces cannot have parameter types that cannot be named
-                        return symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1;
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                        if (ts.hasModifier(node.parent, 32 /* Static */)) {
-                            return symbolAccessibilityResult.errorModuleName ?
-                                symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
-                                    ts.Diagnostics.Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
-                                    ts.Diagnostics.Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
-                                ts.Diagnostics.Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1;
-                        }
-                        else if (node.parent.parent.kind === 221 /* ClassDeclaration */) {
-                            return symbolAccessibilityResult.errorModuleName ?
-                                symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
-                                    ts.Diagnostics.Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
-                                    ts.Diagnostics.Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
-                                ts.Diagnostics.Parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1;
-                        }
-                        else {
-                            // Interfaces cannot have parameter types that cannot be named
-                            return symbolAccessibilityResult.errorModuleName ?
-                                ts.Diagnostics.Parameter_0_of_method_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
-                                ts.Diagnostics.Parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1;
+        } while (previousNode !== node);
+        return node;
+    }
+    ts.skipOuterExpressions = skipOuterExpressions;
+    function skipParentheses(node) {
+        while (node.kind === 185 /* ParenthesizedExpression */) {
+            node = node.expression;
+        }
+        return node;
+    }
+    ts.skipParentheses = skipParentheses;
+    function skipAssertions(node) {
+        while (ts.isAssertionExpression(node) || node.kind === 203 /* NonNullExpression */) {
+            node = node.expression;
+        }
+        return node;
+    }
+    ts.skipAssertions = skipAssertions;
+    function updateOuterExpression(outerExpression, expression) {
+        switch (outerExpression.kind) {
+            case 185 /* ParenthesizedExpression */: return ts.updateParen(outerExpression, expression);
+            case 184 /* TypeAssertionExpression */: return ts.updateTypeAssertion(outerExpression, outerExpression.type, expression);
+            case 202 /* AsExpression */: return ts.updateAsExpression(outerExpression, expression, outerExpression.type);
+            case 203 /* NonNullExpression */: return ts.updateNonNullExpression(outerExpression, expression);
+            case 297 /* PartiallyEmittedExpression */: return ts.updatePartiallyEmittedExpression(outerExpression, expression);
+        }
+    }
+    function recreateOuterExpressions(outerExpression, innerExpression, kinds) {
+        if (kinds === void 0) { kinds = 7 /* All */; }
+        if (outerExpression && isOuterExpression(outerExpression, kinds)) {
+            return updateOuterExpression(outerExpression, recreateOuterExpressions(outerExpression.expression, innerExpression));
+        }
+        return innerExpression;
+    }
+    ts.recreateOuterExpressions = recreateOuterExpressions;
+    function startOnNewLine(node) {
+        node.startsOnNewLine = true;
+        return node;
+    }
+    ts.startOnNewLine = startOnNewLine;
+    function getExternalHelpersModuleName(node) {
+        var parseNode = ts.getOriginalNode(node, ts.isSourceFile);
+        var emitNode = parseNode && parseNode.emitNode;
+        return emitNode && emitNode.externalHelpersModuleName;
+    }
+    ts.getExternalHelpersModuleName = getExternalHelpersModuleName;
+    function getOrCreateExternalHelpersModuleNameIfNeeded(node, compilerOptions, hasExportStarsToExportValues) {
+        if (compilerOptions.importHelpers && ts.isEffectiveExternalModule(node, compilerOptions)) {
+            var externalHelpersModuleName = getExternalHelpersModuleName(node);
+            if (externalHelpersModuleName) {
+                return externalHelpersModuleName;
+            }
+            var moduleKind = ts.getEmitModuleKind(compilerOptions);
+            var create = hasExportStarsToExportValues
+                && moduleKind !== ts.ModuleKind.System
+                && moduleKind !== ts.ModuleKind.ES2015;
+            if (!create) {
+                var helpers = ts.getEmitHelpers(node);
+                if (helpers) {
+                    for (var _i = 0, helpers_2 = helpers; _i < helpers_2.length; _i++) {
+                        var helper = helpers_2[_i];
+                        if (!helper.scoped) {
+                            create = true;
+                            break;
                         }
-                    case 220 /* FunctionDeclaration */:
-                        return symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
-                                ts.Diagnostics.Parameter_0_of_exported_function_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
-                                ts.Diagnostics.Parameter_0_of_exported_function_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Parameter_0_of_exported_function_has_or_is_using_private_name_1;
-                    default:
-                        ts.Debug.fail("This is unknown parent for parameter: " + node.parent.kind);
+                    }
                 }
             }
-            function emitBindingPattern(bindingPattern) {
-                // We have to explicitly emit square bracket and bracket because these tokens are not store inside the node.
-                if (bindingPattern.kind === 167 /* ObjectBindingPattern */) {
-                    write("{");
-                    emitCommaList(bindingPattern.elements, emitBindingElement);
-                    write("}");
+            if (create) {
+                var parseNode = ts.getOriginalNode(node, ts.isSourceFile);
+                var emitNode = ts.getOrCreateEmitNode(parseNode);
+                return emitNode.externalHelpersModuleName || (emitNode.externalHelpersModuleName = ts.createUniqueName(ts.externalHelpersModuleNameText));
+            }
+        }
+    }
+    ts.getOrCreateExternalHelpersModuleNameIfNeeded = getOrCreateExternalHelpersModuleNameIfNeeded;
+    /**
+     * Get the name of that target module from an import or export declaration
+     */
+    function getLocalNameForExternalImport(node, sourceFile) {
+        var namespaceDeclaration = ts.getNamespaceDeclarationNode(node);
+        if (namespaceDeclaration && !ts.isDefaultImport(node)) {
+            var name_41 = namespaceDeclaration.name;
+            return ts.isGeneratedIdentifier(name_41) ? name_41 : ts.createIdentifier(ts.getSourceTextOfNodeFromSourceFile(sourceFile, namespaceDeclaration.name));
+        }
+        if (node.kind === 238 /* ImportDeclaration */ && node.importClause) {
+            return ts.getGeneratedNameForNode(node);
+        }
+        if (node.kind === 244 /* ExportDeclaration */ && node.moduleSpecifier) {
+            return ts.getGeneratedNameForNode(node);
+        }
+        return undefined;
+    }
+    ts.getLocalNameForExternalImport = getLocalNameForExternalImport;
+    /**
+     * Get the name of a target module from an import/export declaration as should be written in the emitted output.
+     * The emitted output name can be different from the input if:
+     *  1. The module has a /// <amd-module name="<new name>" />
+     *  2. --out or --outFile is used, making the name relative to the rootDir
+     *  3- The containing SourceFile has an entry in renamedDependencies for the import as requested by some module loaders (e.g. System).
+     * Otherwise, a new StringLiteral node representing the module name will be returned.
+     */
+    function getExternalModuleNameLiteral(importNode, sourceFile, host, resolver, compilerOptions) {
+        var moduleName = ts.getExternalModuleName(importNode);
+        if (moduleName.kind === 9 /* StringLiteral */) {
+            return tryGetModuleNameFromDeclaration(importNode, host, resolver, compilerOptions)
+                || tryRenameExternalModule(moduleName, sourceFile)
+                || ts.getSynthesizedClone(moduleName);
+        }
+        return undefined;
+    }
+    ts.getExternalModuleNameLiteral = getExternalModuleNameLiteral;
+    /**
+     * Some bundlers (SystemJS builder) sometimes want to rename dependencies.
+     * Here we check if alternative name was provided for a given moduleName and return it if possible.
+     */
+    function tryRenameExternalModule(moduleName, sourceFile) {
+        var rename = sourceFile.renamedDependencies && sourceFile.renamedDependencies.get(moduleName.text);
+        return rename && ts.createLiteral(rename);
+    }
+    /**
+     * Get the name of a module as should be written in the emitted output.
+     * The emitted output name can be different from the input if:
+     *  1. The module has a /// <amd-module name="<new name>" />
+     *  2. --out or --outFile is used, making the name relative to the rootDir
+     * Otherwise, a new StringLiteral node representing the module name will be returned.
+     */
+    function tryGetModuleNameFromFile(file, host, options) {
+        if (!file) {
+            return undefined;
+        }
+        if (file.moduleName) {
+            return ts.createLiteral(file.moduleName);
+        }
+        if (!file.isDeclarationFile && (options.out || options.outFile)) {
+            return ts.createLiteral(ts.getExternalModuleNameFromPath(host, file.fileName));
+        }
+        return undefined;
+    }
+    ts.tryGetModuleNameFromFile = tryGetModuleNameFromFile;
+    function tryGetModuleNameFromDeclaration(declaration, host, resolver, compilerOptions) {
+        return tryGetModuleNameFromFile(resolver.getExternalModuleFileFromDeclaration(declaration), host, compilerOptions);
+    }
+    /**
+     * Gets the initializer of an BindingOrAssignmentElement.
+     */
+    function getInitializerOfBindingOrAssignmentElement(bindingElement) {
+        if (ts.isDeclarationBindingElement(bindingElement)) {
+            // `1` in `let { a = 1 } = ...`
+            // `1` in `let { a: b = 1 } = ...`
+            // `1` in `let { a: {b} = 1 } = ...`
+            // `1` in `let { a: [b] = 1 } = ...`
+            // `1` in `let [a = 1] = ...`
+            // `1` in `let [{a} = 1] = ...`
+            // `1` in `let [[a] = 1] = ...`
+            return bindingElement.initializer;
+        }
+        if (ts.isPropertyAssignment(bindingElement)) {
+            // `1` in `({ a: b = 1 } = ...)`
+            // `1` in `({ a: {b} = 1 } = ...)`
+            // `1` in `({ a: [b] = 1 } = ...)`
+            return ts.isAssignmentExpression(bindingElement.initializer, /*excludeCompoundAssignment*/ true)
+                ? bindingElement.initializer.right
+                : undefined;
+        }
+        if (ts.isShorthandPropertyAssignment(bindingElement)) {
+            // `1` in `({ a = 1 } = ...)`
+            return bindingElement.objectAssignmentInitializer;
+        }
+        if (ts.isAssignmentExpression(bindingElement, /*excludeCompoundAssignment*/ true)) {
+            // `1` in `[a = 1] = ...`
+            // `1` in `[{a} = 1] = ...`
+            // `1` in `[[a] = 1] = ...`
+            return bindingElement.right;
+        }
+        if (ts.isSpreadElement(bindingElement)) {
+            // Recovery consistent with existing emit.
+            return getInitializerOfBindingOrAssignmentElement(bindingElement.expression);
+        }
+    }
+    ts.getInitializerOfBindingOrAssignmentElement = getInitializerOfBindingOrAssignmentElement;
+    /**
+     * Gets the name of an BindingOrAssignmentElement.
+     */
+    function getTargetOfBindingOrAssignmentElement(bindingElement) {
+        if (ts.isDeclarationBindingElement(bindingElement)) {
+            // `a` in `let { a } = ...`
+            // `a` in `let { a = 1 } = ...`
+            // `b` in `let { a: b } = ...`
+            // `b` in `let { a: b = 1 } = ...`
+            // `a` in `let { ...a } = ...`
+            // `{b}` in `let { a: {b} } = ...`
+            // `{b}` in `let { a: {b} = 1 } = ...`
+            // `[b]` in `let { a: [b] } = ...`
+            // `[b]` in `let { a: [b] = 1 } = ...`
+            // `a` in `let [a] = ...`
+            // `a` in `let [a = 1] = ...`
+            // `a` in `let [...a] = ...`
+            // `{a}` in `let [{a}] = ...`
+            // `{a}` in `let [{a} = 1] = ...`
+            // `[a]` in `let [[a]] = ...`
+            // `[a]` in `let [[a] = 1] = ...`
+            return bindingElement.name;
+        }
+        if (ts.isObjectLiteralElementLike(bindingElement)) {
+            switch (bindingElement.kind) {
+                case 261 /* PropertyAssignment */:
+                    // `b` in `({ a: b } = ...)`
+                    // `b` in `({ a: b = 1 } = ...)`
+                    // `{b}` in `({ a: {b} } = ...)`
+                    // `{b}` in `({ a: {b} = 1 } = ...)`
+                    // `[b]` in `({ a: [b] } = ...)`
+                    // `[b]` in `({ a: [b] = 1 } = ...)`
+                    // `b.c` in `({ a: b.c } = ...)`
+                    // `b.c` in `({ a: b.c = 1 } = ...)`
+                    // `b[0]` in `({ a: b[0] } = ...)`
+                    // `b[0]` in `({ a: b[0] = 1 } = ...)`
+                    return getTargetOfBindingOrAssignmentElement(bindingElement.initializer);
+                case 262 /* ShorthandPropertyAssignment */:
+                    // `a` in `({ a } = ...)`
+                    // `a` in `({ a = 1 } = ...)`
+                    return bindingElement.name;
+                case 263 /* SpreadAssignment */:
+                    // `a` in `({ ...a } = ...)`
+                    return getTargetOfBindingOrAssignmentElement(bindingElement.expression);
+            }
+            // no target
+            return undefined;
+        }
+        if (ts.isAssignmentExpression(bindingElement, /*excludeCompoundAssignment*/ true)) {
+            // `a` in `[a = 1] = ...`
+            // `{a}` in `[{a} = 1] = ...`
+            // `[a]` in `[[a] = 1] = ...`
+            // `a.b` in `[a.b = 1] = ...`
+            // `a[0]` in `[a[0] = 1] = ...`
+            return getTargetOfBindingOrAssignmentElement(bindingElement.left);
+        }
+        if (ts.isSpreadElement(bindingElement)) {
+            // `a` in `[...a] = ...`
+            return getTargetOfBindingOrAssignmentElement(bindingElement.expression);
+        }
+        // `a` in `[a] = ...`
+        // `{a}` in `[{a}] = ...`
+        // `[a]` in `[[a]] = ...`
+        // `a.b` in `[a.b] = ...`
+        // `a[0]` in `[a[0]] = ...`
+        return bindingElement;
+    }
+    ts.getTargetOfBindingOrAssignmentElement = getTargetOfBindingOrAssignmentElement;
+    /**
+     * Determines whether an BindingOrAssignmentElement is a rest element.
+     */
+    function getRestIndicatorOfBindingOrAssignmentElement(bindingElement) {
+        switch (bindingElement.kind) {
+            case 146 /* Parameter */:
+            case 176 /* BindingElement */:
+                // `...` in `let [...a] = ...`
+                return bindingElement.dotDotDotToken;
+            case 198 /* SpreadElement */:
+            case 263 /* SpreadAssignment */:
+                // `...` in `[...a] = ...`
+                return bindingElement;
+        }
+        return undefined;
+    }
+    ts.getRestIndicatorOfBindingOrAssignmentElement = getRestIndicatorOfBindingOrAssignmentElement;
+    /**
+     * Gets the property name of a BindingOrAssignmentElement
+     */
+    function getPropertyNameOfBindingOrAssignmentElement(bindingElement) {
+        switch (bindingElement.kind) {
+            case 176 /* BindingElement */:
+                // `a` in `let { a: b } = ...`
+                // `[a]` in `let { [a]: b } = ...`
+                // `"a"` in `let { "a": b } = ...`
+                // `1` in `let { 1: b } = ...`
+                if (bindingElement.propertyName) {
+                    var propertyName = bindingElement.propertyName;
+                    return ts.isComputedPropertyName(propertyName) && ts.isStringOrNumericLiteral(propertyName.expression)
+                        ? propertyName.expression
+                        : propertyName;
                 }
-                else if (bindingPattern.kind === 168 /* ArrayBindingPattern */) {
-                    write("[");
-                    var elements = bindingPattern.elements;
-                    emitCommaList(elements, emitBindingElement);
-                    if (elements && elements.hasTrailingComma) {
-                        write(", ");
-                    }
-                    write("]");
+                break;
+            case 261 /* PropertyAssignment */:
+                // `a` in `({ a: b } = ...)`
+                // `[a]` in `({ [a]: b } = ...)`
+                // `"a"` in `({ "a": b } = ...)`
+                // `1` in `({ 1: b } = ...)`
+                if (bindingElement.name) {
+                    var propertyName = bindingElement.name;
+                    return ts.isComputedPropertyName(propertyName) && ts.isStringOrNumericLiteral(propertyName.expression)
+                        ? propertyName.expression
+                        : propertyName;
                 }
-            }
-            function emitBindingElement(bindingElement) {
-                if (bindingElement.kind === 193 /* OmittedExpression */) {
-                    // If bindingElement is an omittedExpression (i.e. containing elision),
-                    // we will emit blank space (although this may differ from users' original code,
-                    // it allows emitSeparatedList to write separator appropriately)
-                    // Example:
-                    //      original: function foo([, x, ,]) {}
-                    //      emit    : function foo([ , x,  , ]) {}
-                    write(" ");
+                break;
+            case 263 /* SpreadAssignment */:
+                // `a` in `({ ...a } = ...)`
+                return bindingElement.name;
+        }
+        var target = getTargetOfBindingOrAssignmentElement(bindingElement);
+        if (target && ts.isPropertyName(target)) {
+            return ts.isComputedPropertyName(target) && ts.isStringOrNumericLiteral(target.expression)
+                ? target.expression
+                : target;
+        }
+        ts.Debug.fail("Invalid property name for binding element.");
+    }
+    ts.getPropertyNameOfBindingOrAssignmentElement = getPropertyNameOfBindingOrAssignmentElement;
+    /**
+     * Gets the elements of a BindingOrAssignmentPattern
+     */
+    function getElementsOfBindingOrAssignmentPattern(name) {
+        switch (name.kind) {
+            case 174 /* ObjectBindingPattern */:
+            case 175 /* ArrayBindingPattern */:
+            case 177 /* ArrayLiteralExpression */:
+                // `a` in `{a}`
+                // `a` in `[a]`
+                return name.elements;
+            case 178 /* ObjectLiteralExpression */:
+                // `a` in `{a}`
+                return name.properties;
+        }
+    }
+    ts.getElementsOfBindingOrAssignmentPattern = getElementsOfBindingOrAssignmentPattern;
+    function convertToArrayAssignmentElement(element) {
+        if (ts.isBindingElement(element)) {
+            if (element.dotDotDotToken) {
+                ts.Debug.assertNode(element.name, ts.isIdentifier);
+                return ts.setOriginalNode(ts.setTextRange(ts.createSpread(element.name), element), element);
+            }
+            var expression = convertToAssignmentElementTarget(element.name);
+            return element.initializer
+                ? ts.setOriginalNode(ts.setTextRange(ts.createAssignment(expression, element.initializer), element), element)
+                : expression;
+        }
+        ts.Debug.assertNode(element, ts.isExpression);
+        return element;
+    }
+    ts.convertToArrayAssignmentElement = convertToArrayAssignmentElement;
+    function convertToObjectAssignmentElement(element) {
+        if (ts.isBindingElement(element)) {
+            if (element.dotDotDotToken) {
+                ts.Debug.assertNode(element.name, ts.isIdentifier);
+                return ts.setOriginalNode(ts.setTextRange(ts.createSpreadAssignment(element.name), element), element);
+            }
+            if (element.propertyName) {
+                var expression = convertToAssignmentElementTarget(element.name);
+                return ts.setOriginalNode(ts.setTextRange(ts.createPropertyAssignment(element.propertyName, element.initializer ? ts.createAssignment(expression, element.initializer) : expression), element), element);
+            }
+            ts.Debug.assertNode(element.name, ts.isIdentifier);
+            return ts.setOriginalNode(ts.setTextRange(ts.createShorthandPropertyAssignment(element.name, element.initializer), element), element);
+        }
+        ts.Debug.assertNode(element, ts.isObjectLiteralElementLike);
+        return element;
+    }
+    ts.convertToObjectAssignmentElement = convertToObjectAssignmentElement;
+    function convertToAssignmentPattern(node) {
+        switch (node.kind) {
+            case 175 /* ArrayBindingPattern */:
+            case 177 /* ArrayLiteralExpression */:
+                return convertToArrayAssignmentPattern(node);
+            case 174 /* ObjectBindingPattern */:
+            case 178 /* ObjectLiteralExpression */:
+                return convertToObjectAssignmentPattern(node);
+        }
+    }
+    ts.convertToAssignmentPattern = convertToAssignmentPattern;
+    function convertToObjectAssignmentPattern(node) {
+        if (ts.isObjectBindingPattern(node)) {
+            return ts.setOriginalNode(ts.setTextRange(ts.createObjectLiteral(ts.map(node.elements, convertToObjectAssignmentElement)), node), node);
+        }
+        ts.Debug.assertNode(node, ts.isObjectLiteralExpression);
+        return node;
+    }
+    ts.convertToObjectAssignmentPattern = convertToObjectAssignmentPattern;
+    function convertToArrayAssignmentPattern(node) {
+        if (ts.isArrayBindingPattern(node)) {
+            return ts.setOriginalNode(ts.setTextRange(ts.createArrayLiteral(ts.map(node.elements, convertToArrayAssignmentElement)), node), node);
+        }
+        ts.Debug.assertNode(node, ts.isArrayLiteralExpression);
+        return node;
+    }
+    ts.convertToArrayAssignmentPattern = convertToArrayAssignmentPattern;
+    function convertToAssignmentElementTarget(node) {
+        if (ts.isBindingPattern(node)) {
+            return convertToAssignmentPattern(node);
+        }
+        ts.Debug.assertNode(node, ts.isExpression);
+        return node;
+    }
+    ts.convertToAssignmentElementTarget = convertToAssignmentElementTarget;
+})(ts || (ts = {}));
+/// <reference path="checker.ts" />
+/// <reference path="factory.ts" />
+/// <reference path="utilities.ts" />
+var ts;
+(function (ts) {
+    function visitNode(node, visitor, test, lift) {
+        if (node === undefined || visitor === undefined) {
+            return node;
+        }
+        ts.aggregateTransformFlags(node);
+        var visited = visitor(node);
+        if (visited === node) {
+            return node;
+        }
+        var visitedNode;
+        if (visited === undefined) {
+            return undefined;
+        }
+        else if (ts.isArray(visited)) {
+            visitedNode = (lift || extractSingleNode)(visited);
+        }
+        else {
+            visitedNode = visited;
+        }
+        ts.Debug.assertNode(visitedNode, test);
+        ts.aggregateTransformFlags(visitedNode);
+        return visitedNode;
+    }
+    ts.visitNode = visitNode;
+    /**
+     * Visits a NodeArray using the supplied visitor, possibly returning a new NodeArray in its place.
+     *
+     * @param nodes The NodeArray to visit.
+     * @param visitor The callback used to visit a Node.
+     * @param test A node test to execute for each node.
+     * @param start An optional value indicating the starting offset at which to start visiting.
+     * @param count An optional value indicating the maximum number of nodes to visit.
+     */
+    function visitNodes(nodes, visitor, test, start, count) {
+        if (nodes === undefined || visitor === undefined) {
+            return nodes;
+        }
+        var updated;
+        // Ensure start and count have valid values
+        var length = nodes.length;
+        if (start === undefined || start < 0) {
+            start = 0;
+        }
+        if (count === undefined || count > length - start) {
+            count = length - start;
+        }
+        if (start > 0 || count < length) {
+            // If we are not visiting all of the original nodes, we must always create a new array.
+            // Since this is a fragment of a node array, we do not copy over the previous location
+            // and will only copy over `hasTrailingComma` if we are including the last element.
+            updated = ts.createNodeArray([], /*hasTrailingComma*/ nodes.hasTrailingComma && start + count === length);
+        }
+        // Visit each original node.
+        for (var i = 0; i < count; i++) {
+            var node = nodes[i + start];
+            ts.aggregateTransformFlags(node);
+            var visited = node !== undefined ? visitor(node) : undefined;
+            if (updated !== undefined || visited === undefined || visited !== node) {
+                if (updated === undefined) {
+                    // Ensure we have a copy of `nodes`, up to the current index.
+                    updated = ts.createNodeArray(nodes.slice(0, i), nodes.hasTrailingComma);
+                    ts.setTextRange(updated, nodes);
                 }
-                else if (bindingElement.kind === 169 /* BindingElement */) {
-                    if (bindingElement.propertyName) {
-                        // bindingElement has propertyName property in the following case:
-                        //      { y: [a,b,c] ...} -> bindingPattern will have a property called propertyName for "y"
-                        // We have to explicitly emit the propertyName before descending into its binding elements.
-                        // Example:
-                        //      original: function foo({y: [a,b,c]}) {}
-                        //      emit    : declare function foo({y: [a, b, c]}: { y: [any, any, any] }) void;
-                        writeTextOfNode(currentText, bindingElement.propertyName);
-                        write(": ");
-                    }
-                    if (bindingElement.name) {
-                        if (ts.isBindingPattern(bindingElement.name)) {
-                            // If it is a nested binding pattern, we will recursively descend into each element and emit each one separately.
-                            // In the case of rest element, we will omit rest element.
-                            // Example:
-                            //      original: function foo([a, [[b]], c] = [1,[["string"]], 3]) {}
-                            //      emit    : declare function foo([a, [[b]], c]: [number, [[string]], number]): void;
-                            //      original with rest: function foo([a, ...c]) {}
-                            //      emit              : declare function foo([a, ...c]): void;
-                            emitBindingPattern(bindingElement.name);
-                        }
-                        else {
-                            ts.Debug.assert(bindingElement.name.kind === 69 /* Identifier */);
-                            // If the node is just an identifier, we will simply emit the text associated with the node's name
-                            // Example:
-                            //      original: function foo({y = 10, x}) {}
-                            //      emit    : declare function foo({y, x}: {number, any}): void;
-                            if (bindingElement.dotDotDotToken) {
-                                write("...");
-                            }
-                            writeTextOfNode(currentText, bindingElement.name);
+                if (visited) {
+                    if (ts.isArray(visited)) {
+                        for (var _i = 0, visited_1 = visited; _i < visited_1.length; _i++) {
+                            var visitedNode = visited_1[_i];
+                            ts.Debug.assertNode(visitedNode, test);
+                            ts.aggregateTransformFlags(visitedNode);
+                            updated.push(visitedNode);
                         }
                     }
+                    else {
+                        ts.Debug.assertNode(visited, test);
+                        ts.aggregateTransformFlags(visited);
+                        updated.push(visited);
+                    }
                 }
             }
         }
-        function emitNode(node) {
-            switch (node.kind) {
-                case 220 /* FunctionDeclaration */:
-                case 225 /* ModuleDeclaration */:
-                case 229 /* ImportEqualsDeclaration */:
-                case 222 /* InterfaceDeclaration */:
-                case 221 /* ClassDeclaration */:
-                case 223 /* TypeAliasDeclaration */:
-                case 224 /* EnumDeclaration */:
-                    return emitModuleElement(node, isModuleElementVisible(node));
-                case 200 /* VariableStatement */:
-                    return emitModuleElement(node, isVariableStatementVisible(node));
-                case 230 /* ImportDeclaration */:
-                    // Import declaration without import clause is visible, otherwise it is not visible
-                    return emitModuleElement(node, /*isModuleElementVisible*/ !node.importClause);
-                case 236 /* ExportDeclaration */:
-                    return emitExportDeclaration(node);
-                case 148 /* Constructor */:
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                    return writeFunctionDeclaration(node);
-                case 152 /* ConstructSignature */:
-                case 151 /* CallSignature */:
-                case 153 /* IndexSignature */:
-                    return emitSignatureDeclarationWithJsDocComments(node);
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                    return emitAccessorDeclaration(node);
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
-                    return emitPropertyDeclaration(node);
-                case 255 /* EnumMember */:
-                    return emitEnumMemberDeclaration(node);
-                case 235 /* ExportAssignment */:
-                    return emitExportAssignment(node);
-                case 256 /* SourceFile */:
-                    return emitSourceFile(node);
-            }
+        return updated || nodes;
+    }
+    ts.visitNodes = visitNodes;
+    /**
+     * Starts a new lexical environment and visits a statement list, ending the lexical environment
+     * and merging hoisted declarations upon completion.
+     */
+    function visitLexicalEnvironment(statements, visitor, context, start, ensureUseStrict) {
+        context.startLexicalEnvironment();
+        statements = visitNodes(statements, visitor, ts.isStatement, start);
+        if (ensureUseStrict && !ts.startsWithUseStrict(statements)) {
+            statements = ts.setTextRange(ts.createNodeArray([ts.createStatement(ts.createLiteral("use strict"))].concat(statements)), statements);
         }
-        /**
-         * Adds the reference to referenced file, returns true if global file reference was emitted
-         * @param referencedFile
-         * @param addBundledFileReference Determines if global file reference corresponding to bundled file should be emitted or not
-         */
-        function writeReferencePath(referencedFile, addBundledFileReference, emitOnlyDtsFiles) {
-            var declFileName;
-            var addedBundledEmitReference = false;
-            if (ts.isDeclarationFile(referencedFile)) {
-                // Declaration file, use declaration file name
-                declFileName = referencedFile.fileName;
-            }
-            else {
-                // Get the declaration file path
-                ts.forEachExpectedEmitFile(host, getDeclFileName, referencedFile, emitOnlyDtsFiles);
-            }
-            if (declFileName) {
-                declFileName = ts.getRelativePathToDirectoryOrUrl(ts.getDirectoryPath(ts.normalizeSlashes(declarationFilePath)), declFileName, host.getCurrentDirectory(), host.getCanonicalFileName, 
-                /*isAbsolutePathAnUrl*/ false);
-                referencesOutput += "/// <reference path=\"" + declFileName + "\" />" + newLine;
-            }
-            return addedBundledEmitReference;
-            function getDeclFileName(emitFileNames, sourceFiles, isBundledEmit) {
-                // Dont add reference path to this file if it is a bundled emit and caller asked not emit bundled file path
-                if (isBundledEmit && !addBundledFileReference) {
-                    return;
-                }
-                ts.Debug.assert(!!emitFileNames.declarationFilePath || ts.isSourceFileJavaScript(referencedFile), "Declaration file is not present only for javascript files");
-                declFileName = emitFileNames.declarationFilePath || emitFileNames.jsFilePath;
-                addedBundledEmitReference = isBundledEmit;
-            }
+        var declarations = context.endLexicalEnvironment();
+        return ts.setTextRange(ts.createNodeArray(ts.concatenate(statements, declarations)), statements);
+    }
+    ts.visitLexicalEnvironment = visitLexicalEnvironment;
+    /**
+     * Starts a new lexical environment and visits a parameter list, suspending the lexical
+     * environment upon completion.
+     */
+    function visitParameterList(nodes, visitor, context, nodesVisitor) {
+        if (nodesVisitor === void 0) { nodesVisitor = visitNodes; }
+        context.startLexicalEnvironment();
+        var updated = nodesVisitor(nodes, visitor, ts.isParameterDeclaration);
+        context.suspendLexicalEnvironment();
+        return updated;
+    }
+    ts.visitParameterList = visitParameterList;
+    function visitFunctionBody(node, visitor, context) {
+        context.resumeLexicalEnvironment();
+        var updated = visitNode(node, visitor, ts.isConciseBody);
+        var declarations = context.endLexicalEnvironment();
+        if (ts.some(declarations)) {
+            var block = ts.convertToFunctionBody(updated);
+            var statements = ts.mergeLexicalEnvironment(block.statements, declarations);
+            return ts.updateBlock(block, statements);
         }
+        return updated;
     }
-    /* @internal */
-    function writeDeclarationFile(declarationFilePath, sourceFiles, isBundledEmit, host, resolver, emitterDiagnostics, emitOnlyDtsFiles) {
-        var emitDeclarationResult = emitDeclarations(host, resolver, emitterDiagnostics, declarationFilePath, sourceFiles, isBundledEmit, emitOnlyDtsFiles);
-        var emitSkipped = emitDeclarationResult.reportedDeclarationError || host.isEmitBlocked(declarationFilePath) || host.getCompilerOptions().noEmit;
-        if (!emitSkipped) {
-            var declarationOutput = emitDeclarationResult.referencesOutput
-                + getDeclarationOutput(emitDeclarationResult.synchronousDeclarationOutput, emitDeclarationResult.moduleElementDeclarationEmitInfo);
-            ts.writeFile(host, emitterDiagnostics, declarationFilePath, declarationOutput, host.getCompilerOptions().emitBOM, sourceFiles);
+    ts.visitFunctionBody = visitFunctionBody;
+    function visitEachChild(node, visitor, context, nodesVisitor, tokenVisitor) {
+        if (nodesVisitor === void 0) { nodesVisitor = visitNodes; }
+        if (node === undefined) {
+            return undefined;
         }
-        return emitSkipped;
-        function getDeclarationOutput(synchronousDeclarationOutput, moduleElementDeclarationEmitInfo) {
-            var appliedSyncOutputPos = 0;
-            var declarationOutput = "";
-            // apply asynchronous additions to the synchronous output
-            ts.forEach(moduleElementDeclarationEmitInfo, function (aliasEmitInfo) {
-                if (aliasEmitInfo.asynchronousOutput) {
-                    declarationOutput += synchronousDeclarationOutput.substring(appliedSyncOutputPos, aliasEmitInfo.outputPos);
-                    declarationOutput += getDeclarationOutput(aliasEmitInfo.asynchronousOutput, aliasEmitInfo.subModuleElementDeclarationEmitInfo);
-                    appliedSyncOutputPos = aliasEmitInfo.outputPos;
-                }
-            });
-            declarationOutput += synchronousDeclarationOutput.substring(appliedSyncOutputPos);
-            return declarationOutput;
+        var kind = node.kind;
+        // No need to visit nodes with no children.
+        if ((kind > 0 /* FirstToken */ && kind <= 142 /* LastToken */) || kind === 169 /* ThisType */) {
+            return node;
+        }
+        switch (kind) {
+            // Names
+            case 71 /* Identifier */:
+                return ts.updateIdentifier(node, nodesVisitor(node.typeArguments, visitor, ts.isTypeNode));
+            case 143 /* QualifiedName */:
+                return ts.updateQualifiedName(node, visitNode(node.left, visitor, ts.isEntityName), visitNode(node.right, visitor, ts.isIdentifier));
+            case 144 /* ComputedPropertyName */:
+                return ts.updateComputedPropertyName(node, visitNode(node.expression, visitor, ts.isExpression));
+            // Signature elements
+            case 145 /* TypeParameter */:
+                return ts.updateTypeParameterDeclaration(node, visitNode(node.name, visitor, ts.isIdentifier), visitNode(node.constraint, visitor, ts.isTypeNode), visitNode(node.default, visitor, ts.isTypeNode));
+            case 146 /* Parameter */:
+                return ts.updateParameter(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.dotDotDotToken, tokenVisitor, ts.isToken), visitNode(node.name, visitor, ts.isBindingName), visitNode(node.questionToken, tokenVisitor, ts.isToken), visitNode(node.type, visitor, ts.isTypeNode), visitNode(node.initializer, visitor, ts.isExpression));
+            case 147 /* Decorator */:
+                return ts.updateDecorator(node, visitNode(node.expression, visitor, ts.isExpression));
+            // Type elements
+            case 148 /* PropertySignature */:
+                return ts.updatePropertySignature(node, nodesVisitor(node.modifiers, visitor, ts.isToken), visitNode(node.name, visitor, ts.isPropertyName), visitNode(node.questionToken, tokenVisitor, ts.isToken), visitNode(node.type, visitor, ts.isTypeNode), visitNode(node.initializer, visitor, ts.isExpression));
+            case 149 /* PropertyDeclaration */:
+                return ts.updateProperty(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isPropertyName), visitNode(node.type, visitor, ts.isTypeNode), visitNode(node.initializer, visitor, ts.isExpression));
+            case 150 /* MethodSignature */:
+                return ts.updateMethodSignature(node, nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), nodesVisitor(node.parameters, visitor, ts.isParameterDeclaration), visitNode(node.type, visitor, ts.isTypeNode), visitNode(node.name, visitor, ts.isPropertyName), visitNode(node.questionToken, tokenVisitor, ts.isToken));
+            case 151 /* MethodDeclaration */:
+                return ts.updateMethod(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.asteriskToken, tokenVisitor, ts.isToken), visitNode(node.name, visitor, ts.isPropertyName), visitNode(node.questionToken, tokenVisitor, ts.isToken), nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), visitParameterList(node.parameters, visitor, context, nodesVisitor), visitNode(node.type, visitor, ts.isTypeNode), visitFunctionBody(node.body, visitor, context));
+            case 152 /* Constructor */:
+                return ts.updateConstructor(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitParameterList(node.parameters, visitor, context, nodesVisitor), visitFunctionBody(node.body, visitor, context));
+            case 153 /* GetAccessor */:
+                return ts.updateGetAccessor(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isPropertyName), visitParameterList(node.parameters, visitor, context, nodesVisitor), visitNode(node.type, visitor, ts.isTypeNode), visitFunctionBody(node.body, visitor, context));
+            case 154 /* SetAccessor */:
+                return ts.updateSetAccessor(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isPropertyName), visitParameterList(node.parameters, visitor, context, nodesVisitor), visitFunctionBody(node.body, visitor, context));
+            case 155 /* CallSignature */:
+                return ts.updateCallSignature(node, nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), nodesVisitor(node.parameters, visitor, ts.isParameterDeclaration), visitNode(node.type, visitor, ts.isTypeNode));
+            case 156 /* ConstructSignature */:
+                return ts.updateConstructSignature(node, nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), nodesVisitor(node.parameters, visitor, ts.isParameterDeclaration), visitNode(node.type, visitor, ts.isTypeNode));
+            case 157 /* IndexSignature */:
+                return ts.updateIndexSignature(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), nodesVisitor(node.parameters, visitor, ts.isParameterDeclaration), visitNode(node.type, visitor, ts.isTypeNode));
+            // Types
+            case 158 /* TypePredicate */:
+                return ts.updateTypePredicateNode(node, visitNode(node.parameterName, visitor), visitNode(node.type, visitor, ts.isTypeNode));
+            case 159 /* TypeReference */:
+                return ts.updateTypeReferenceNode(node, visitNode(node.typeName, visitor, ts.isEntityName), nodesVisitor(node.typeArguments, visitor, ts.isTypeNode));
+            case 160 /* FunctionType */:
+                return ts.updateFunctionTypeNode(node, nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), nodesVisitor(node.parameters, visitor, ts.isParameterDeclaration), visitNode(node.type, visitor, ts.isTypeNode));
+            case 161 /* ConstructorType */:
+                return ts.updateConstructorTypeNode(node, nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), nodesVisitor(node.parameters, visitor, ts.isParameterDeclaration), visitNode(node.type, visitor, ts.isTypeNode));
+            case 162 /* TypeQuery */:
+                return ts.updateTypeQueryNode(node, visitNode(node.exprName, visitor, ts.isEntityName));
+            case 163 /* TypeLiteral */:
+                return ts.updateTypeLiteralNode(node, nodesVisitor(node.members, visitor, ts.isTypeElement));
+            case 164 /* ArrayType */:
+                return ts.updateArrayTypeNode(node, visitNode(node.elementType, visitor, ts.isTypeNode));
+            case 165 /* TupleType */:
+                return ts.updateTypleTypeNode(node, nodesVisitor(node.elementTypes, visitor, ts.isTypeNode));
+            case 166 /* UnionType */:
+                return ts.updateUnionTypeNode(node, nodesVisitor(node.types, visitor, ts.isTypeNode));
+            case 167 /* IntersectionType */:
+                return ts.updateIntersectionTypeNode(node, nodesVisitor(node.types, visitor, ts.isTypeNode));
+            case 168 /* ParenthesizedType */:
+                return ts.updateParenthesizedType(node, visitNode(node.type, visitor, ts.isTypeNode));
+            case 170 /* TypeOperator */:
+                return ts.updateTypeOperatorNode(node, visitNode(node.type, visitor, ts.isTypeNode));
+            case 171 /* IndexedAccessType */:
+                return ts.updateIndexedAccessTypeNode(node, visitNode(node.objectType, visitor, ts.isTypeNode), visitNode(node.indexType, visitor, ts.isTypeNode));
+            case 172 /* MappedType */:
+                return ts.updateMappedTypeNode(node, visitNode(node.readonlyToken, tokenVisitor, ts.isToken), visitNode(node.typeParameter, visitor, ts.isTypeParameterDeclaration), visitNode(node.questionToken, tokenVisitor, ts.isToken), visitNode(node.type, visitor, ts.isTypeNode));
+            case 173 /* LiteralType */:
+                return ts.updateLiteralTypeNode(node, visitNode(node.literal, visitor, ts.isExpression));
+            // Binding patterns
+            case 174 /* ObjectBindingPattern */:
+                return ts.updateObjectBindingPattern(node, nodesVisitor(node.elements, visitor, ts.isBindingElement));
+            case 175 /* ArrayBindingPattern */:
+                return ts.updateArrayBindingPattern(node, nodesVisitor(node.elements, visitor, ts.isArrayBindingElement));
+            case 176 /* BindingElement */:
+                return ts.updateBindingElement(node, visitNode(node.dotDotDotToken, tokenVisitor, ts.isToken), visitNode(node.propertyName, visitor, ts.isPropertyName), visitNode(node.name, visitor, ts.isBindingName), visitNode(node.initializer, visitor, ts.isExpression));
+            // Expression
+            case 177 /* ArrayLiteralExpression */:
+                return ts.updateArrayLiteral(node, nodesVisitor(node.elements, visitor, ts.isExpression));
+            case 178 /* ObjectLiteralExpression */:
+                return ts.updateObjectLiteral(node, nodesVisitor(node.properties, visitor, ts.isObjectLiteralElementLike));
+            case 179 /* PropertyAccessExpression */:
+                return ts.updatePropertyAccess(node, visitNode(node.expression, visitor, ts.isExpression), visitNode(node.name, visitor, ts.isIdentifier));
+            case 180 /* ElementAccessExpression */:
+                return ts.updateElementAccess(node, visitNode(node.expression, visitor, ts.isExpression), visitNode(node.argumentExpression, visitor, ts.isExpression));
+            case 181 /* CallExpression */:
+                return ts.updateCall(node, visitNode(node.expression, visitor, ts.isExpression), nodesVisitor(node.typeArguments, visitor, ts.isTypeNode), nodesVisitor(node.arguments, visitor, ts.isExpression));
+            case 182 /* NewExpression */:
+                return ts.updateNew(node, visitNode(node.expression, visitor, ts.isExpression), nodesVisitor(node.typeArguments, visitor, ts.isTypeNode), nodesVisitor(node.arguments, visitor, ts.isExpression));
+            case 183 /* TaggedTemplateExpression */:
+                return ts.updateTaggedTemplate(node, visitNode(node.tag, visitor, ts.isExpression), visitNode(node.template, visitor, ts.isTemplateLiteral));
+            case 184 /* TypeAssertionExpression */:
+                return ts.updateTypeAssertion(node, visitNode(node.type, visitor, ts.isTypeNode), visitNode(node.expression, visitor, ts.isExpression));
+            case 185 /* ParenthesizedExpression */:
+                return ts.updateParen(node, visitNode(node.expression, visitor, ts.isExpression));
+            case 186 /* FunctionExpression */:
+                return ts.updateFunctionExpression(node, nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.asteriskToken, tokenVisitor, ts.isToken), visitNode(node.name, visitor, ts.isIdentifier), nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), visitParameterList(node.parameters, visitor, context, nodesVisitor), visitNode(node.type, visitor, ts.isTypeNode), visitFunctionBody(node.body, visitor, context));
+            case 187 /* ArrowFunction */:
+                return ts.updateArrowFunction(node, nodesVisitor(node.modifiers, visitor, ts.isModifier), nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), visitParameterList(node.parameters, visitor, context, nodesVisitor), visitNode(node.type, visitor, ts.isTypeNode), visitFunctionBody(node.body, visitor, context));
+            case 188 /* DeleteExpression */:
+                return ts.updateDelete(node, visitNode(node.expression, visitor, ts.isExpression));
+            case 189 /* TypeOfExpression */:
+                return ts.updateTypeOf(node, visitNode(node.expression, visitor, ts.isExpression));
+            case 190 /* VoidExpression */:
+                return ts.updateVoid(node, visitNode(node.expression, visitor, ts.isExpression));
+            case 191 /* AwaitExpression */:
+                return ts.updateAwait(node, visitNode(node.expression, visitor, ts.isExpression));
+            case 192 /* PrefixUnaryExpression */:
+                return ts.updatePrefix(node, visitNode(node.operand, visitor, ts.isExpression));
+            case 193 /* PostfixUnaryExpression */:
+                return ts.updatePostfix(node, visitNode(node.operand, visitor, ts.isExpression));
+            case 194 /* BinaryExpression */:
+                return ts.updateBinary(node, visitNode(node.left, visitor, ts.isExpression), visitNode(node.right, visitor, ts.isExpression), visitNode(node.operatorToken, visitor, ts.isToken));
+            case 195 /* ConditionalExpression */:
+                return ts.updateConditional(node, visitNode(node.condition, visitor, ts.isExpression), visitNode(node.whenTrue, visitor, ts.isExpression), visitNode(node.whenFalse, visitor, ts.isExpression));
+            case 196 /* TemplateExpression */:
+                return ts.updateTemplateExpression(node, visitNode(node.head, visitor, ts.isTemplateHead), nodesVisitor(node.templateSpans, visitor, ts.isTemplateSpan));
+            case 197 /* YieldExpression */:
+                return ts.updateYield(node, visitNode(node.asteriskToken, tokenVisitor, ts.isToken), visitNode(node.expression, visitor, ts.isExpression));
+            case 198 /* SpreadElement */:
+                return ts.updateSpread(node, visitNode(node.expression, visitor, ts.isExpression));
+            case 199 /* ClassExpression */:
+                return ts.updateClassExpression(node, nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isIdentifier), nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), nodesVisitor(node.heritageClauses, visitor, ts.isHeritageClause), nodesVisitor(node.members, visitor, ts.isClassElement));
+            case 201 /* ExpressionWithTypeArguments */:
+                return ts.updateExpressionWithTypeArguments(node, nodesVisitor(node.typeArguments, visitor, ts.isTypeNode), visitNode(node.expression, visitor, ts.isExpression));
+            case 202 /* AsExpression */:
+                return ts.updateAsExpression(node, visitNode(node.expression, visitor, ts.isExpression), visitNode(node.type, visitor, ts.isTypeNode));
+            case 203 /* NonNullExpression */:
+                return ts.updateNonNullExpression(node, visitNode(node.expression, visitor, ts.isExpression));
+            case 204 /* MetaProperty */:
+                return ts.updateMetaProperty(node, visitNode(node.name, visitor, ts.isIdentifier));
+            // Misc
+            case 205 /* TemplateSpan */:
+                return ts.updateTemplateSpan(node, visitNode(node.expression, visitor, ts.isExpression), visitNode(node.literal, visitor, ts.isTemplateMiddleOrTemplateTail));
+            // Element
+            case 207 /* Block */:
+                return ts.updateBlock(node, nodesVisitor(node.statements, visitor, ts.isStatement));
+            case 208 /* VariableStatement */:
+                return ts.updateVariableStatement(node, nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.declarationList, visitor, ts.isVariableDeclarationList));
+            case 210 /* ExpressionStatement */:
+                return ts.updateStatement(node, visitNode(node.expression, visitor, ts.isExpression));
+            case 211 /* IfStatement */:
+                return ts.updateIf(node, visitNode(node.expression, visitor, ts.isExpression), visitNode(node.thenStatement, visitor, ts.isStatement, ts.liftToBlock), visitNode(node.elseStatement, visitor, ts.isStatement, ts.liftToBlock));
+            case 212 /* DoStatement */:
+                return ts.updateDo(node, visitNode(node.statement, visitor, ts.isStatement, ts.liftToBlock), visitNode(node.expression, visitor, ts.isExpression));
+            case 213 /* WhileStatement */:
+                return ts.updateWhile(node, visitNode(node.expression, visitor, ts.isExpression), visitNode(node.statement, visitor, ts.isStatement, ts.liftToBlock));
+            case 214 /* ForStatement */:
+                return ts.updateFor(node, visitNode(node.initializer, visitor, ts.isForInitializer), visitNode(node.condition, visitor, ts.isExpression), visitNode(node.incrementor, visitor, ts.isExpression), visitNode(node.statement, visitor, ts.isStatement, ts.liftToBlock));
+            case 215 /* ForInStatement */:
+                return ts.updateForIn(node, visitNode(node.initializer, visitor, ts.isForInitializer), visitNode(node.expression, visitor, ts.isExpression), visitNode(node.statement, visitor, ts.isStatement, ts.liftToBlock));
+            case 216 /* ForOfStatement */:
+                return ts.updateForOf(node, node.awaitModifier, visitNode(node.initializer, visitor, ts.isForInitializer), visitNode(node.expression, visitor, ts.isExpression), visitNode(node.statement, visitor, ts.isStatement, ts.liftToBlock));
+            case 217 /* ContinueStatement */:
+                return ts.updateContinue(node, visitNode(node.label, visitor, ts.isIdentifier));
+            case 218 /* BreakStatement */:
+                return ts.updateBreak(node, visitNode(node.label, visitor, ts.isIdentifier));
+            case 219 /* ReturnStatement */:
+                return ts.updateReturn(node, visitNode(node.expression, visitor, ts.isExpression));
+            case 220 /* WithStatement */:
+                return ts.updateWith(node, visitNode(node.expression, visitor, ts.isExpression), visitNode(node.statement, visitor, ts.isStatement, ts.liftToBlock));
+            case 221 /* SwitchStatement */:
+                return ts.updateSwitch(node, visitNode(node.expression, visitor, ts.isExpression), visitNode(node.caseBlock, visitor, ts.isCaseBlock));
+            case 222 /* LabeledStatement */:
+                return ts.updateLabel(node, visitNode(node.label, visitor, ts.isIdentifier), visitNode(node.statement, visitor, ts.isStatement, ts.liftToBlock));
+            case 223 /* ThrowStatement */:
+                return ts.updateThrow(node, visitNode(node.expression, visitor, ts.isExpression));
+            case 224 /* TryStatement */:
+                return ts.updateTry(node, visitNode(node.tryBlock, visitor, ts.isBlock), visitNode(node.catchClause, visitor, ts.isCatchClause), visitNode(node.finallyBlock, visitor, ts.isBlock));
+            case 226 /* VariableDeclaration */:
+                return ts.updateVariableDeclaration(node, visitNode(node.name, visitor, ts.isBindingName), visitNode(node.type, visitor, ts.isTypeNode), visitNode(node.initializer, visitor, ts.isExpression));
+            case 227 /* VariableDeclarationList */:
+                return ts.updateVariableDeclarationList(node, nodesVisitor(node.declarations, visitor, ts.isVariableDeclaration));
+            case 228 /* FunctionDeclaration */:
+                return ts.updateFunctionDeclaration(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.asteriskToken, tokenVisitor, ts.isToken), visitNode(node.name, visitor, ts.isIdentifier), nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), visitParameterList(node.parameters, visitor, context, nodesVisitor), visitNode(node.type, visitor, ts.isTypeNode), visitFunctionBody(node.body, visitor, context));
+            case 229 /* ClassDeclaration */:
+                return ts.updateClassDeclaration(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isIdentifier), nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), nodesVisitor(node.heritageClauses, visitor, ts.isHeritageClause), nodesVisitor(node.members, visitor, ts.isClassElement));
+            case 230 /* InterfaceDeclaration */:
+                return ts.updateInterfaceDeclaration(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isIdentifier), nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), nodesVisitor(node.heritageClauses, visitor, ts.isHeritageClause), nodesVisitor(node.members, visitor, ts.isTypeElement));
+            case 231 /* TypeAliasDeclaration */:
+                return ts.updateTypeAliasDeclaration(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isIdentifier), nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), visitNode(node.type, visitor, ts.isTypeNode));
+            case 232 /* EnumDeclaration */:
+                return ts.updateEnumDeclaration(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isIdentifier), nodesVisitor(node.members, visitor, ts.isEnumMember));
+            case 233 /* ModuleDeclaration */:
+                return ts.updateModuleDeclaration(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isIdentifier), visitNode(node.body, visitor, ts.isModuleBody));
+            case 234 /* ModuleBlock */:
+                return ts.updateModuleBlock(node, nodesVisitor(node.statements, visitor, ts.isStatement));
+            case 235 /* CaseBlock */:
+                return ts.updateCaseBlock(node, nodesVisitor(node.clauses, visitor, ts.isCaseOrDefaultClause));
+            case 236 /* NamespaceExportDeclaration */:
+                return ts.updateNamespaceExportDeclaration(node, visitNode(node.name, visitor, ts.isIdentifier));
+            case 237 /* ImportEqualsDeclaration */:
+                return ts.updateImportEqualsDeclaration(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isIdentifier), visitNode(node.moduleReference, visitor, ts.isModuleReference));
+            case 238 /* ImportDeclaration */:
+                return ts.updateImportDeclaration(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.importClause, visitor, ts.isImportClause), visitNode(node.moduleSpecifier, visitor, ts.isExpression));
+            case 239 /* ImportClause */:
+                return ts.updateImportClause(node, visitNode(node.name, visitor, ts.isIdentifier), visitNode(node.namedBindings, visitor, ts.isNamedImportBindings));
+            case 240 /* NamespaceImport */:
+                return ts.updateNamespaceImport(node, visitNode(node.name, visitor, ts.isIdentifier));
+            case 241 /* NamedImports */:
+                return ts.updateNamedImports(node, nodesVisitor(node.elements, visitor, ts.isImportSpecifier));
+            case 242 /* ImportSpecifier */:
+                return ts.updateImportSpecifier(node, visitNode(node.propertyName, visitor, ts.isIdentifier), visitNode(node.name, visitor, ts.isIdentifier));
+            case 243 /* ExportAssignment */:
+                return ts.updateExportAssignment(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.expression, visitor, ts.isExpression));
+            case 244 /* ExportDeclaration */:
+                return ts.updateExportDeclaration(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.exportClause, visitor, ts.isNamedExports), visitNode(node.moduleSpecifier, visitor, ts.isExpression));
+            case 245 /* NamedExports */:
+                return ts.updateNamedExports(node, nodesVisitor(node.elements, visitor, ts.isExportSpecifier));
+            case 246 /* ExportSpecifier */:
+                return ts.updateExportSpecifier(node, visitNode(node.propertyName, visitor, ts.isIdentifier), visitNode(node.name, visitor, ts.isIdentifier));
+            // Module references
+            case 248 /* ExternalModuleReference */:
+                return ts.updateExternalModuleReference(node, visitNode(node.expression, visitor, ts.isExpression));
+            // JSX
+            case 249 /* JsxElement */:
+                return ts.updateJsxElement(node, visitNode(node.openingElement, visitor, ts.isJsxOpeningElement), nodesVisitor(node.children, visitor, ts.isJsxChild), visitNode(node.closingElement, visitor, ts.isJsxClosingElement));
+            case 250 /* JsxSelfClosingElement */:
+                return ts.updateJsxSelfClosingElement(node, visitNode(node.tagName, visitor, ts.isJsxTagNameExpression), visitNode(node.attributes, visitor, ts.isJsxAttributes));
+            case 251 /* JsxOpeningElement */:
+                return ts.updateJsxOpeningElement(node, visitNode(node.tagName, visitor, ts.isJsxTagNameExpression), visitNode(node.attributes, visitor, ts.isJsxAttributes));
+            case 252 /* JsxClosingElement */:
+                return ts.updateJsxClosingElement(node, visitNode(node.tagName, visitor, ts.isJsxTagNameExpression));
+            case 253 /* JsxAttribute */:
+                return ts.updateJsxAttribute(node, visitNode(node.name, visitor, ts.isIdentifier), visitNode(node.initializer, visitor, ts.isStringLiteralOrJsxExpression));
+            case 254 /* JsxAttributes */:
+                return ts.updateJsxAttributes(node, nodesVisitor(node.properties, visitor, ts.isJsxAttributeLike));
+            case 255 /* JsxSpreadAttribute */:
+                return ts.updateJsxSpreadAttribute(node, visitNode(node.expression, visitor, ts.isExpression));
+            case 256 /* JsxExpression */:
+                return ts.updateJsxExpression(node, visitNode(node.expression, visitor, ts.isExpression));
+            // Clauses
+            case 257 /* CaseClause */:
+                return ts.updateCaseClause(node, visitNode(node.expression, visitor, ts.isExpression), nodesVisitor(node.statements, visitor, ts.isStatement));
+            case 258 /* DefaultClause */:
+                return ts.updateDefaultClause(node, nodesVisitor(node.statements, visitor, ts.isStatement));
+            case 259 /* HeritageClause */:
+                return ts.updateHeritageClause(node, nodesVisitor(node.types, visitor, ts.isExpressionWithTypeArguments));
+            case 260 /* CatchClause */:
+                return ts.updateCatchClause(node, visitNode(node.variableDeclaration, visitor, ts.isVariableDeclaration), visitNode(node.block, visitor, ts.isBlock));
+            // Property assignments
+            case 261 /* PropertyAssignment */:
+                return ts.updatePropertyAssignment(node, visitNode(node.name, visitor, ts.isPropertyName), visitNode(node.initializer, visitor, ts.isExpression));
+            case 262 /* ShorthandPropertyAssignment */:
+                return ts.updateShorthandPropertyAssignment(node, visitNode(node.name, visitor, ts.isIdentifier), visitNode(node.objectAssignmentInitializer, visitor, ts.isExpression));
+            case 263 /* SpreadAssignment */:
+                return ts.updateSpreadAssignment(node, visitNode(node.expression, visitor, ts.isExpression));
+            // Enum
+            case 264 /* EnumMember */:
+                return ts.updateEnumMember(node, visitNode(node.name, visitor, ts.isPropertyName), visitNode(node.initializer, visitor, ts.isExpression));
+            // Top-level nodes
+            case 265 /* SourceFile */:
+                return ts.updateSourceFileNode(node, visitLexicalEnvironment(node.statements, visitor, context));
+            // Transformation nodes
+            case 297 /* PartiallyEmittedExpression */:
+                return ts.updatePartiallyEmittedExpression(node, visitNode(node.expression, visitor, ts.isExpression));
+            case 298 /* CommaListExpression */:
+                return ts.updateCommaList(node, nodesVisitor(node.elements, visitor, ts.isExpression));
+            default:
+                // No need to visit nodes with no children.
+                return node;
         }
     }
-    ts.writeDeclarationFile = writeDeclarationFile;
-})(ts || (ts = {}));
-/// <reference path="checker.ts" />
-/// <reference path="factory.ts" />
-/// <reference path="utilities.ts" />
-/* @internal */
-var ts;
-(function (ts) {
-    ;
+    ts.visitEachChild = visitEachChild;
     /**
-     * This map contains information about the shape of each Node in "types.ts" pertaining to how
-     * each node should be traversed during a transformation.
-     *
-     * Each edge corresponds to a property in a Node subtype that should be traversed when visiting
-     * each child. The properties are assigned in the order in which traversal should occur.
-     *
-     * We only add entries for nodes that do not have a create/update pair defined in factory.ts
+     * Extracts the single node from a NodeArray.
      *
-     * NOTE: This needs to be kept up to date with changes to nodes in "types.ts". Currently, this
-     *       map is not comprehensive. Only node edges relevant to tree transformation are
-     *       currently defined. We may extend this to be more comprehensive, and eventually
-     *       supplant the existing `forEachChild` implementation if performance is not
-     *       significantly impacted.
+     * @param nodes The NodeArray.
      */
-    var nodeEdgeTraversalMap = ts.createMap((_a = {},
-        _a[139 /* QualifiedName */] = [
-            { name: "left", test: ts.isEntityName },
-            { name: "right", test: ts.isIdentifier }
-        ],
-        _a[143 /* Decorator */] = [
-            { name: "expression", test: ts.isLeftHandSideExpression }
-        ],
-        _a[177 /* TypeAssertionExpression */] = [
-            { name: "type", test: ts.isTypeNode },
-            { name: "expression", test: ts.isUnaryExpression }
-        ],
-        _a[195 /* AsExpression */] = [
-            { name: "expression", test: ts.isExpression },
-            { name: "type", test: ts.isTypeNode }
-        ],
-        _a[196 /* NonNullExpression */] = [
-            { name: "expression", test: ts.isLeftHandSideExpression }
-        ],
-        _a[224 /* EnumDeclaration */] = [
-            { name: "decorators", test: ts.isDecorator },
-            { name: "modifiers", test: ts.isModifier },
-            { name: "name", test: ts.isIdentifier },
-            { name: "members", test: ts.isEnumMember }
-        ],
-        _a[225 /* ModuleDeclaration */] = [
-            { name: "decorators", test: ts.isDecorator },
-            { name: "modifiers", test: ts.isModifier },
-            { name: "name", test: ts.isModuleName },
-            { name: "body", test: ts.isModuleBody }
-        ],
-        _a[226 /* ModuleBlock */] = [
-            { name: "statements", test: ts.isStatement }
-        ],
-        _a[229 /* ImportEqualsDeclaration */] = [
-            { name: "decorators", test: ts.isDecorator },
-            { name: "modifiers", test: ts.isModifier },
-            { name: "name", test: ts.isIdentifier },
-            { name: "moduleReference", test: ts.isModuleReference }
-        ],
-        _a[240 /* ExternalModuleReference */] = [
-            { name: "expression", test: ts.isExpression, optional: true }
-        ],
-        _a[255 /* EnumMember */] = [
-            { name: "name", test: ts.isPropertyName },
-            { name: "initializer", test: ts.isExpression, optional: true, parenthesize: ts.parenthesizeExpressionForList }
-        ],
-        _a));
+    function extractSingleNode(nodes) {
+        ts.Debug.assert(nodes.length <= 1, "Too many nodes written to output.");
+        return ts.singleOrUndefined(nodes);
+    }
+})(ts || (ts = {}));
+/* @internal */
+(function (ts) {
     function reduceNode(node, f, initial) {
         return node ? f(initial, node) : initial;
     }
+    function reduceNodeArray(nodes, f, initial) {
+        return nodes ? f(initial, nodes) : initial;
+    }
     /**
      * Similar to `reduceLeft`, performs a reduction against each child of a node.
-     * NOTE: Unlike `forEachChild`, this does *not* visit every node. Only nodes added to the
-     *       `nodeEdgeTraversalMap` above will be visited.
+     * NOTE: Unlike `forEachChild`, this does *not* visit every node.
      *
      * @param node The node containing the children to reduce.
-     * @param f The callback function
      * @param initial The initial value to supply to the reduction.
+     * @param f The callback function
      */
-    function reduceEachChild(node, f, initial) {
+    function reduceEachChild(node, initial, cbNode, cbNodeArray) {
         if (node === undefined) {
             return initial;
         }
+        var reduceNodes = cbNodeArray ? reduceNodeArray : ts.reduceLeft;
+        var cbNodes = cbNodeArray || cbNode;
         var kind = node.kind;
         // No need to visit nodes with no children.
-        if ((kind > 0 /* FirstToken */ && kind <= 138 /* LastToken */)) {
+        if ((kind > 0 /* FirstToken */ && kind <= 142 /* LastToken */)) {
             return initial;
         }
         // We do not yet support types.
-        if ((kind >= 154 /* TypePredicate */ && kind <= 166 /* LiteralType */)) {
+        if ((kind >= 158 /* TypePredicate */ && kind <= 173 /* LiteralType */)) {
             return initial;
         }
         var result = initial;
         switch (node.kind) {
             // Leaf nodes
-            case 198 /* SemicolonClassElement */:
-            case 201 /* EmptyStatement */:
-            case 193 /* OmittedExpression */:
-            case 217 /* DebuggerStatement */:
-            case 287 /* NotEmittedStatement */:
+            case 206 /* SemicolonClassElement */:
+            case 209 /* EmptyStatement */:
+            case 200 /* OmittedExpression */:
+            case 225 /* DebuggerStatement */:
+            case 296 /* NotEmittedStatement */:
                 // No need to visit nodes with no children.
                 break;
             // Names
-            case 140 /* ComputedPropertyName */:
-                result = reduceNode(node.expression, f, result);
+            case 143 /* QualifiedName */:
+                result = reduceNode(node.left, cbNode, result);
+                result = reduceNode(node.right, cbNode, result);
+                break;
+            case 144 /* ComputedPropertyName */:
+                result = reduceNode(node.expression, cbNode, result);
                 break;
             // Signature elements
-            case 142 /* Parameter */:
-                result = ts.reduceLeft(node.decorators, f, result);
-                result = ts.reduceLeft(node.modifiers, f, result);
-                result = reduceNode(node.name, f, result);
-                result = reduceNode(node.type, f, result);
-                result = reduceNode(node.initializer, f, result);
+            case 146 /* Parameter */:
+                result = reduceNodes(node.decorators, cbNodes, result);
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNode(node.type, cbNode, result);
+                result = reduceNode(node.initializer, cbNode, result);
                 break;
-            case 143 /* Decorator */:
-                result = reduceNode(node.expression, f, result);
+            case 147 /* Decorator */:
+                result = reduceNode(node.expression, cbNode, result);
                 break;
             // Type member
-            case 145 /* PropertyDeclaration */:
-                result = ts.reduceLeft(node.decorators, f, result);
-                result = ts.reduceLeft(node.modifiers, f, result);
-                result = reduceNode(node.name, f, result);
-                result = reduceNode(node.type, f, result);
-                result = reduceNode(node.initializer, f, result);
+            case 148 /* PropertySignature */:
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNode(node.questionToken, cbNode, result);
+                result = reduceNode(node.type, cbNode, result);
+                result = reduceNode(node.initializer, cbNode, result);
+                break;
+            case 149 /* PropertyDeclaration */:
+                result = reduceNodes(node.decorators, cbNodes, result);
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNode(node.type, cbNode, result);
+                result = reduceNode(node.initializer, cbNode, result);
                 break;
-            case 147 /* MethodDeclaration */:
-                result = ts.reduceLeft(node.decorators, f, result);
-                result = ts.reduceLeft(node.modifiers, f, result);
-                result = reduceNode(node.name, f, result);
-                result = ts.reduceLeft(node.typeParameters, f, result);
-                result = ts.reduceLeft(node.parameters, f, result);
-                result = reduceNode(node.type, f, result);
-                result = reduceNode(node.body, f, result);
+            case 151 /* MethodDeclaration */:
+                result = reduceNodes(node.decorators, cbNodes, result);
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNodes(node.typeParameters, cbNodes, result);
+                result = reduceNodes(node.parameters, cbNodes, result);
+                result = reduceNode(node.type, cbNode, result);
+                result = reduceNode(node.body, cbNode, result);
                 break;
-            case 148 /* Constructor */:
-                result = ts.reduceLeft(node.modifiers, f, result);
-                result = ts.reduceLeft(node.parameters, f, result);
-                result = reduceNode(node.body, f, result);
+            case 152 /* Constructor */:
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNodes(node.parameters, cbNodes, result);
+                result = reduceNode(node.body, cbNode, result);
                 break;
-            case 149 /* GetAccessor */:
-                result = ts.reduceLeft(node.decorators, f, result);
-                result = ts.reduceLeft(node.modifiers, f, result);
-                result = reduceNode(node.name, f, result);
-                result = ts.reduceLeft(node.parameters, f, result);
-                result = reduceNode(node.type, f, result);
-                result = reduceNode(node.body, f, result);
+            case 153 /* GetAccessor */:
+                result = reduceNodes(node.decorators, cbNodes, result);
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNodes(node.parameters, cbNodes, result);
+                result = reduceNode(node.type, cbNode, result);
+                result = reduceNode(node.body, cbNode, result);
                 break;
-            case 150 /* SetAccessor */:
-                result = ts.reduceLeft(node.decorators, f, result);
-                result = ts.reduceLeft(node.modifiers, f, result);
-                result = reduceNode(node.name, f, result);
-                result = ts.reduceLeft(node.parameters, f, result);
-                result = reduceNode(node.body, f, result);
+            case 154 /* SetAccessor */:
+                result = reduceNodes(node.decorators, cbNodes, result);
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNodes(node.parameters, cbNodes, result);
+                result = reduceNode(node.body, cbNode, result);
                 break;
             // Binding patterns
-            case 167 /* ObjectBindingPattern */:
-            case 168 /* ArrayBindingPattern */:
-                result = ts.reduceLeft(node.elements, f, result);
+            case 174 /* ObjectBindingPattern */:
+            case 175 /* ArrayBindingPattern */:
+                result = reduceNodes(node.elements, cbNodes, result);
                 break;
-            case 169 /* BindingElement */:
-                result = reduceNode(node.propertyName, f, result);
-                result = reduceNode(node.name, f, result);
-                result = reduceNode(node.initializer, f, result);
+            case 176 /* BindingElement */:
+                result = reduceNode(node.propertyName, cbNode, result);
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNode(node.initializer, cbNode, result);
                 break;
             // Expression
-            case 170 /* ArrayLiteralExpression */:
-                result = ts.reduceLeft(node.elements, f, result);
+            case 177 /* ArrayLiteralExpression */:
+                result = reduceNodes(node.elements, cbNodes, result);
+                break;
+            case 178 /* ObjectLiteralExpression */:
+                result = reduceNodes(node.properties, cbNodes, result);
+                break;
+            case 179 /* PropertyAccessExpression */:
+                result = reduceNode(node.expression, cbNode, result);
+                result = reduceNode(node.name, cbNode, result);
                 break;
-            case 171 /* ObjectLiteralExpression */:
-                result = ts.reduceLeft(node.properties, f, result);
+            case 180 /* ElementAccessExpression */:
+                result = reduceNode(node.expression, cbNode, result);
+                result = reduceNode(node.argumentExpression, cbNode, result);
                 break;
-            case 172 /* PropertyAccessExpression */:
-                result = reduceNode(node.expression, f, result);
-                result = reduceNode(node.name, f, result);
+            case 181 /* CallExpression */:
+                result = reduceNode(node.expression, cbNode, result);
+                result = reduceNodes(node.typeArguments, cbNodes, result);
+                result = reduceNodes(node.arguments, cbNodes, result);
                 break;
-            case 173 /* ElementAccessExpression */:
-                result = reduceNode(node.expression, f, result);
-                result = reduceNode(node.argumentExpression, f, result);
+            case 182 /* NewExpression */:
+                result = reduceNode(node.expression, cbNode, result);
+                result = reduceNodes(node.typeArguments, cbNodes, result);
+                result = reduceNodes(node.arguments, cbNodes, result);
                 break;
-            case 174 /* CallExpression */:
-                result = reduceNode(node.expression, f, result);
-                result = ts.reduceLeft(node.typeArguments, f, result);
-                result = ts.reduceLeft(node.arguments, f, result);
+            case 183 /* TaggedTemplateExpression */:
+                result = reduceNode(node.tag, cbNode, result);
+                result = reduceNode(node.template, cbNode, result);
                 break;
-            case 175 /* NewExpression */:
-                result = reduceNode(node.expression, f, result);
-                result = ts.reduceLeft(node.typeArguments, f, result);
-                result = ts.reduceLeft(node.arguments, f, result);
+            case 184 /* TypeAssertionExpression */:
+                result = reduceNode(node.type, cbNode, result);
+                result = reduceNode(node.expression, cbNode, result);
                 break;
-            case 176 /* TaggedTemplateExpression */:
-                result = reduceNode(node.tag, f, result);
-                result = reduceNode(node.template, f, result);
+            case 186 /* FunctionExpression */:
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNodes(node.typeParameters, cbNodes, result);
+                result = reduceNodes(node.parameters, cbNodes, result);
+                result = reduceNode(node.type, cbNode, result);
+                result = reduceNode(node.body, cbNode, result);
                 break;
-            case 179 /* FunctionExpression */:
-                result = ts.reduceLeft(node.modifiers, f, result);
-                result = reduceNode(node.name, f, result);
-                result = ts.reduceLeft(node.typeParameters, f, result);
-                result = ts.reduceLeft(node.parameters, f, result);
-                result = reduceNode(node.type, f, result);
-                result = reduceNode(node.body, f, result);
+            case 187 /* ArrowFunction */:
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNodes(node.typeParameters, cbNodes, result);
+                result = reduceNodes(node.parameters, cbNodes, result);
+                result = reduceNode(node.type, cbNode, result);
+                result = reduceNode(node.body, cbNode, result);
                 break;
-            case 180 /* ArrowFunction */:
-                result = ts.reduceLeft(node.modifiers, f, result);
-                result = ts.reduceLeft(node.typeParameters, f, result);
-                result = ts.reduceLeft(node.parameters, f, result);
-                result = reduceNode(node.type, f, result);
-                result = reduceNode(node.body, f, result);
+            case 185 /* ParenthesizedExpression */:
+            case 188 /* DeleteExpression */:
+            case 189 /* TypeOfExpression */:
+            case 190 /* VoidExpression */:
+            case 191 /* AwaitExpression */:
+            case 197 /* YieldExpression */:
+            case 198 /* SpreadElement */:
+            case 203 /* NonNullExpression */:
+                result = reduceNode(node.expression, cbNode, result);
                 break;
-            case 178 /* ParenthesizedExpression */:
-            case 181 /* DeleteExpression */:
-            case 182 /* TypeOfExpression */:
-            case 183 /* VoidExpression */:
-            case 184 /* AwaitExpression */:
-            case 190 /* YieldExpression */:
-            case 191 /* SpreadElementExpression */:
-            case 196 /* NonNullExpression */:
-                result = reduceNode(node.expression, f, result);
+            case 192 /* PrefixUnaryExpression */:
+            case 193 /* PostfixUnaryExpression */:
+                result = reduceNode(node.operand, cbNode, result);
                 break;
-            case 185 /* PrefixUnaryExpression */:
-            case 186 /* PostfixUnaryExpression */:
-                result = reduceNode(node.operand, f, result);
+            case 194 /* BinaryExpression */:
+                result = reduceNode(node.left, cbNode, result);
+                result = reduceNode(node.right, cbNode, result);
                 break;
-            case 187 /* BinaryExpression */:
-                result = reduceNode(node.left, f, result);
-                result = reduceNode(node.right, f, result);
+            case 195 /* ConditionalExpression */:
+                result = reduceNode(node.condition, cbNode, result);
+                result = reduceNode(node.whenTrue, cbNode, result);
+                result = reduceNode(node.whenFalse, cbNode, result);
                 break;
-            case 188 /* ConditionalExpression */:
-                result = reduceNode(node.condition, f, result);
-                result = reduceNode(node.whenTrue, f, result);
-                result = reduceNode(node.whenFalse, f, result);
+            case 196 /* TemplateExpression */:
+                result = reduceNode(node.head, cbNode, result);
+                result = reduceNodes(node.templateSpans, cbNodes, result);
                 break;
-            case 189 /* TemplateExpression */:
-                result = reduceNode(node.head, f, result);
-                result = ts.reduceLeft(node.templateSpans, f, result);
+            case 199 /* ClassExpression */:
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNodes(node.typeParameters, cbNodes, result);
+                result = reduceNodes(node.heritageClauses, cbNodes, result);
+                result = reduceNodes(node.members, cbNodes, result);
                 break;
-            case 192 /* ClassExpression */:
-                result = ts.reduceLeft(node.modifiers, f, result);
-                result = reduceNode(node.name, f, result);
-                result = ts.reduceLeft(node.typeParameters, f, result);
-                result = ts.reduceLeft(node.heritageClauses, f, result);
-                result = ts.reduceLeft(node.members, f, result);
+            case 201 /* ExpressionWithTypeArguments */:
+                result = reduceNode(node.expression, cbNode, result);
+                result = reduceNodes(node.typeArguments, cbNodes, result);
                 break;
-            case 194 /* ExpressionWithTypeArguments */:
-                result = reduceNode(node.expression, f, result);
-                result = ts.reduceLeft(node.typeArguments, f, result);
+            case 202 /* AsExpression */:
+                result = reduceNode(node.expression, cbNode, result);
+                result = reduceNode(node.type, cbNode, result);
+                break;
+            case 203 /* NonNullExpression */:
+                result = reduceNode(node.expression, cbNode, result);
                 break;
             // Misc
-            case 197 /* TemplateSpan */:
-                result = reduceNode(node.expression, f, result);
-                result = reduceNode(node.literal, f, result);
+            case 205 /* TemplateSpan */:
+                result = reduceNode(node.expression, cbNode, result);
+                result = reduceNode(node.literal, cbNode, result);
                 break;
             // Element
-            case 199 /* Block */:
-                result = ts.reduceLeft(node.statements, f, result);
+            case 207 /* Block */:
+                result = reduceNodes(node.statements, cbNodes, result);
+                break;
+            case 208 /* VariableStatement */:
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNode(node.declarationList, cbNode, result);
+                break;
+            case 210 /* ExpressionStatement */:
+                result = reduceNode(node.expression, cbNode, result);
+                break;
+            case 211 /* IfStatement */:
+                result = reduceNode(node.expression, cbNode, result);
+                result = reduceNode(node.thenStatement, cbNode, result);
+                result = reduceNode(node.elseStatement, cbNode, result);
                 break;
-            case 200 /* VariableStatement */:
-                result = ts.reduceLeft(node.modifiers, f, result);
-                result = reduceNode(node.declarationList, f, result);
+            case 212 /* DoStatement */:
+                result = reduceNode(node.statement, cbNode, result);
+                result = reduceNode(node.expression, cbNode, result);
                 break;
-            case 202 /* ExpressionStatement */:
-                result = reduceNode(node.expression, f, result);
+            case 213 /* WhileStatement */:
+            case 220 /* WithStatement */:
+                result = reduceNode(node.expression, cbNode, result);
+                result = reduceNode(node.statement, cbNode, result);
                 break;
-            case 203 /* IfStatement */:
-                result = reduceNode(node.expression, f, result);
-                result = reduceNode(node.thenStatement, f, result);
-                result = reduceNode(node.elseStatement, f, result);
+            case 214 /* ForStatement */:
+                result = reduceNode(node.initializer, cbNode, result);
+                result = reduceNode(node.condition, cbNode, result);
+                result = reduceNode(node.incrementor, cbNode, result);
+                result = reduceNode(node.statement, cbNode, result);
                 break;
-            case 204 /* DoStatement */:
-                result = reduceNode(node.statement, f, result);
-                result = reduceNode(node.expression, f, result);
+            case 215 /* ForInStatement */:
+            case 216 /* ForOfStatement */:
+                result = reduceNode(node.initializer, cbNode, result);
+                result = reduceNode(node.expression, cbNode, result);
+                result = reduceNode(node.statement, cbNode, result);
                 break;
-            case 205 /* WhileStatement */:
-            case 212 /* WithStatement */:
-                result = reduceNode(node.expression, f, result);
-                result = reduceNode(node.statement, f, result);
+            case 219 /* ReturnStatement */:
+            case 223 /* ThrowStatement */:
+                result = reduceNode(node.expression, cbNode, result);
                 break;
-            case 206 /* ForStatement */:
-                result = reduceNode(node.initializer, f, result);
-                result = reduceNode(node.condition, f, result);
-                result = reduceNode(node.incrementor, f, result);
-                result = reduceNode(node.statement, f, result);
+            case 221 /* SwitchStatement */:
+                result = reduceNode(node.expression, cbNode, result);
+                result = reduceNode(node.caseBlock, cbNode, result);
                 break;
-            case 207 /* ForInStatement */:
-            case 208 /* ForOfStatement */:
-                result = reduceNode(node.initializer, f, result);
-                result = reduceNode(node.expression, f, result);
-                result = reduceNode(node.statement, f, result);
+            case 222 /* LabeledStatement */:
+                result = reduceNode(node.label, cbNode, result);
+                result = reduceNode(node.statement, cbNode, result);
                 break;
-            case 211 /* ReturnStatement */:
-            case 215 /* ThrowStatement */:
-                result = reduceNode(node.expression, f, result);
+            case 224 /* TryStatement */:
+                result = reduceNode(node.tryBlock, cbNode, result);
+                result = reduceNode(node.catchClause, cbNode, result);
+                result = reduceNode(node.finallyBlock, cbNode, result);
                 break;
-            case 213 /* SwitchStatement */:
-                result = reduceNode(node.expression, f, result);
-                result = reduceNode(node.caseBlock, f, result);
+            case 226 /* VariableDeclaration */:
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNode(node.type, cbNode, result);
+                result = reduceNode(node.initializer, cbNode, result);
                 break;
-            case 214 /* LabeledStatement */:
-                result = reduceNode(node.label, f, result);
-                result = reduceNode(node.statement, f, result);
+            case 227 /* VariableDeclarationList */:
+                result = reduceNodes(node.declarations, cbNodes, result);
                 break;
-            case 216 /* TryStatement */:
-                result = reduceNode(node.tryBlock, f, result);
-                result = reduceNode(node.catchClause, f, result);
-                result = reduceNode(node.finallyBlock, f, result);
+            case 228 /* FunctionDeclaration */:
+                result = reduceNodes(node.decorators, cbNodes, result);
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNodes(node.typeParameters, cbNodes, result);
+                result = reduceNodes(node.parameters, cbNodes, result);
+                result = reduceNode(node.type, cbNode, result);
+                result = reduceNode(node.body, cbNode, result);
                 break;
-            case 218 /* VariableDeclaration */:
-                result = reduceNode(node.name, f, result);
-                result = reduceNode(node.type, f, result);
-                result = reduceNode(node.initializer, f, result);
+            case 229 /* ClassDeclaration */:
+                result = reduceNodes(node.decorators, cbNodes, result);
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNodes(node.typeParameters, cbNodes, result);
+                result = reduceNodes(node.heritageClauses, cbNodes, result);
+                result = reduceNodes(node.members, cbNodes, result);
                 break;
-            case 219 /* VariableDeclarationList */:
-                result = ts.reduceLeft(node.declarations, f, result);
+            case 232 /* EnumDeclaration */:
+                result = reduceNodes(node.decorators, cbNodes, result);
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNodes(node.members, cbNodes, result);
                 break;
-            case 220 /* FunctionDeclaration */:
-                result = ts.reduceLeft(node.decorators, f, result);
-                result = ts.reduceLeft(node.modifiers, f, result);
-                result = reduceNode(node.name, f, result);
-                result = ts.reduceLeft(node.typeParameters, f, result);
-                result = ts.reduceLeft(node.parameters, f, result);
-                result = reduceNode(node.type, f, result);
-                result = reduceNode(node.body, f, result);
+            case 233 /* ModuleDeclaration */:
+                result = reduceNodes(node.decorators, cbNodes, result);
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNode(node.body, cbNode, result);
                 break;
-            case 221 /* ClassDeclaration */:
-                result = ts.reduceLeft(node.decorators, f, result);
-                result = ts.reduceLeft(node.modifiers, f, result);
-                result = reduceNode(node.name, f, result);
-                result = ts.reduceLeft(node.typeParameters, f, result);
-                result = ts.reduceLeft(node.heritageClauses, f, result);
-                result = ts.reduceLeft(node.members, f, result);
+            case 234 /* ModuleBlock */:
+                result = reduceNodes(node.statements, cbNodes, result);
                 break;
-            case 227 /* CaseBlock */:
-                result = ts.reduceLeft(node.clauses, f, result);
+            case 235 /* CaseBlock */:
+                result = reduceNodes(node.clauses, cbNodes, result);
                 break;
-            case 230 /* ImportDeclaration */:
-                result = ts.reduceLeft(node.decorators, f, result);
-                result = ts.reduceLeft(node.modifiers, f, result);
-                result = reduceNode(node.importClause, f, result);
-                result = reduceNode(node.moduleSpecifier, f, result);
+            case 237 /* ImportEqualsDeclaration */:
+                result = reduceNodes(node.decorators, cbNodes, result);
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNode(node.moduleReference, cbNode, result);
                 break;
-            case 231 /* ImportClause */:
-                result = reduceNode(node.name, f, result);
-                result = reduceNode(node.namedBindings, f, result);
+            case 238 /* ImportDeclaration */:
+                result = reduceNodes(node.decorators, cbNodes, result);
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNode(node.importClause, cbNode, result);
+                result = reduceNode(node.moduleSpecifier, cbNode, result);
                 break;
-            case 232 /* NamespaceImport */:
-                result = reduceNode(node.name, f, result);
+            case 239 /* ImportClause */:
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNode(node.namedBindings, cbNode, result);
                 break;
-            case 233 /* NamedImports */:
-            case 237 /* NamedExports */:
-                result = ts.reduceLeft(node.elements, f, result);
+            case 240 /* NamespaceImport */:
+                result = reduceNode(node.name, cbNode, result);
                 break;
-            case 234 /* ImportSpecifier */:
-            case 238 /* ExportSpecifier */:
-                result = reduceNode(node.propertyName, f, result);
-                result = reduceNode(node.name, f, result);
+            case 241 /* NamedImports */:
+            case 245 /* NamedExports */:
+                result = reduceNodes(node.elements, cbNodes, result);
                 break;
-            case 235 /* ExportAssignment */:
-                result = ts.reduceLeft(node.decorators, f, result);
-                result = ts.reduceLeft(node.modifiers, f, result);
-                result = reduceNode(node.expression, f, result);
+            case 242 /* ImportSpecifier */:
+            case 246 /* ExportSpecifier */:
+                result = reduceNode(node.propertyName, cbNode, result);
+                result = reduceNode(node.name, cbNode, result);
                 break;
-            case 236 /* ExportDeclaration */:
-                result = ts.reduceLeft(node.decorators, f, result);
-                result = ts.reduceLeft(node.modifiers, f, result);
-                result = reduceNode(node.exportClause, f, result);
-                result = reduceNode(node.moduleSpecifier, f, result);
+            case 243 /* ExportAssignment */:
+                result = ts.reduceLeft(node.decorators, cbNode, result);
+                result = ts.reduceLeft(node.modifiers, cbNode, result);
+                result = reduceNode(node.expression, cbNode, result);
+                break;
+            case 244 /* ExportDeclaration */:
+                result = ts.reduceLeft(node.decorators, cbNode, result);
+                result = ts.reduceLeft(node.modifiers, cbNode, result);
+                result = reduceNode(node.exportClause, cbNode, result);
+                result = reduceNode(node.moduleSpecifier, cbNode, result);
+                break;
+            // Module references
+            case 248 /* ExternalModuleReference */:
+                result = reduceNode(node.expression, cbNode, result);
                 break;
             // JSX
-            case 241 /* JsxElement */:
-                result = reduceNode(node.openingElement, f, result);
-                result = ts.reduceLeft(node.children, f, result);
-                result = reduceNode(node.closingElement, f, result);
+            case 249 /* JsxElement */:
+                result = reduceNode(node.openingElement, cbNode, result);
+                result = ts.reduceLeft(node.children, cbNode, result);
+                result = reduceNode(node.closingElement, cbNode, result);
                 break;
-            case 242 /* JsxSelfClosingElement */:
-            case 243 /* JsxOpeningElement */:
-                result = reduceNode(node.tagName, f, result);
-                result = ts.reduceLeft(node.attributes, f, result);
+            case 250 /* JsxSelfClosingElement */:
+            case 251 /* JsxOpeningElement */:
+                result = reduceNode(node.tagName, cbNode, result);
+                result = reduceNode(node.attributes, cbNode, result);
                 break;
-            case 245 /* JsxClosingElement */:
-                result = reduceNode(node.tagName, f, result);
+            case 254 /* JsxAttributes */:
+                result = reduceNodes(node.properties, cbNodes, result);
                 break;
-            case 246 /* JsxAttribute */:
-                result = reduceNode(node.name, f, result);
-                result = reduceNode(node.initializer, f, result);
+            case 252 /* JsxClosingElement */:
+                result = reduceNode(node.tagName, cbNode, result);
                 break;
-            case 247 /* JsxSpreadAttribute */:
-                result = reduceNode(node.expression, f, result);
+            case 253 /* JsxAttribute */:
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNode(node.initializer, cbNode, result);
                 break;
-            case 248 /* JsxExpression */:
-                result = reduceNode(node.expression, f, result);
+            case 255 /* JsxSpreadAttribute */:
+                result = reduceNode(node.expression, cbNode, result);
+                break;
+            case 256 /* JsxExpression */:
+                result = reduceNode(node.expression, cbNode, result);
                 break;
             // Clauses
-            case 249 /* CaseClause */:
-                result = reduceNode(node.expression, f, result);
-            // fall-through
-            case 250 /* DefaultClause */:
-                result = ts.reduceLeft(node.statements, f, result);
+            case 257 /* CaseClause */:
+                result = reduceNode(node.expression, cbNode, result);
+            // falls through
+            case 258 /* DefaultClause */:
+                result = reduceNodes(node.statements, cbNodes, result);
                 break;
-            case 251 /* HeritageClause */:
-                result = ts.reduceLeft(node.types, f, result);
+            case 259 /* HeritageClause */:
+                result = reduceNodes(node.types, cbNodes, result);
                 break;
-            case 252 /* CatchClause */:
-                result = reduceNode(node.variableDeclaration, f, result);
-                result = reduceNode(node.block, f, result);
+            case 260 /* CatchClause */:
+                result = reduceNode(node.variableDeclaration, cbNode, result);
+                result = reduceNode(node.block, cbNode, result);
                 break;
             // Property assignments
-            case 253 /* PropertyAssignment */:
-                result = reduceNode(node.name, f, result);
-                result = reduceNode(node.initializer, f, result);
+            case 261 /* PropertyAssignment */:
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNode(node.initializer, cbNode, result);
+                break;
+            case 262 /* ShorthandPropertyAssignment */:
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNode(node.objectAssignmentInitializer, cbNode, result);
                 break;
-            case 254 /* ShorthandPropertyAssignment */:
-                result = reduceNode(node.name, f, result);
-                result = reduceNode(node.objectAssignmentInitializer, f, result);
+            case 263 /* SpreadAssignment */:
+                result = reduceNode(node.expression, cbNode, result);
+                break;
+            // Enum
+            case 264 /* EnumMember */:
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNode(node.initializer, cbNode, result);
                 break;
             // Top-level nodes
-            case 256 /* SourceFile */:
-                result = ts.reduceLeft(node.statements, f, result);
+            case 265 /* SourceFile */:
+                result = reduceNodes(node.statements, cbNodes, result);
+                break;
+            // Transformation nodes
+            case 297 /* PartiallyEmittedExpression */:
+                result = reduceNode(node.expression, cbNode, result);
                 break;
-            case 288 /* PartiallyEmittedExpression */:
-                result = reduceNode(node.expression, f, result);
+            case 298 /* CommaListExpression */:
+                result = reduceNodes(node.elements, cbNodes, result);
                 break;
             default:
-                var edgeTraversalPath = nodeEdgeTraversalMap[kind];
-                if (edgeTraversalPath) {
-                    for (var _i = 0, edgeTraversalPath_1 = edgeTraversalPath; _i < edgeTraversalPath_1.length; _i++) {
-                        var edge = edgeTraversalPath_1[_i];
-                        var value = node[edge.name];
-                        if (value !== undefined) {
-                            result = ts.isArray(value)
-                                ? ts.reduceLeft(value, f, result)
-                                : f(result, value);
-                        }
-                    }
-                }
                 break;
         }
         return result;
     }
     ts.reduceEachChild = reduceEachChild;
-    function visitNode(node, visitor, test, optional, lift, parenthesize, parentNode) {
-        if (node === undefined) {
-            return undefined;
-        }
-        var visited = visitor(node);
-        if (visited === node) {
-            return node;
-        }
-        var visitedNode;
-        if (visited === undefined) {
-            if (!optional) {
-                Debug.failNotOptional();
-            }
-            return undefined;
-        }
-        else if (ts.isArray(visited)) {
-            visitedNode = (lift || extractSingleNode)(visited);
-        }
-        else {
-            visitedNode = visited;
-        }
-        if (parenthesize !== undefined) {
-            visitedNode = parenthesize(visitedNode, parentNode);
-        }
-        Debug.assertNode(visitedNode, test);
-        aggregateTransformFlags(visitedNode);
-        return visitedNode;
-    }
-    ts.visitNode = visitNode;
-    function visitNodes(nodes, visitor, test, start, count, parenthesize, parentNode) {
-        if (nodes === undefined) {
-            return undefined;
-        }
-        var updated;
-        // Ensure start and count have valid values
-        var length = nodes.length;
-        if (start === undefined || start < 0) {
-            start = 0;
-        }
-        if (count === undefined || count > length - start) {
-            count = length - start;
-        }
-        if (start > 0 || count < length) {
-            // If we are not visiting all of the original nodes, we must always create a new array.
-            // Since this is a fragment of a node array, we do not copy over the previous location
-            // and will only copy over `hasTrailingComma` if we are including the last element.
-            updated = ts.createNodeArray([], /*location*/ undefined, 
-            /*hasTrailingComma*/ nodes.hasTrailingComma && start + count === length);
-        }
-        // Visit each original node.
-        for (var i = 0; i < count; i++) {
-            var node = nodes[i + start];
-            var visited = node !== undefined ? visitor(node) : undefined;
-            if (updated !== undefined || visited === undefined || visited !== node) {
-                if (updated === undefined) {
-                    // Ensure we have a copy of `nodes`, up to the current index.
-                    updated = ts.createNodeArray(nodes.slice(0, i), /*location*/ nodes, nodes.hasTrailingComma);
-                }
-                if (visited) {
-                    if (ts.isArray(visited)) {
-                        for (var _i = 0, visited_1 = visited; _i < visited_1.length; _i++) {
-                            var visitedNode = visited_1[_i];
-                            visitedNode = parenthesize
-                                ? parenthesize(visitedNode, parentNode)
-                                : visitedNode;
-                            Debug.assertNode(visitedNode, test);
-                            aggregateTransformFlags(visitedNode);
-                            updated.push(visitedNode);
-                        }
-                    }
-                    else {
-                        var visitedNode = parenthesize
-                            ? parenthesize(visited, parentNode)
-                            : visited;
-                        Debug.assertNode(visitedNode, test);
-                        aggregateTransformFlags(visitedNode);
-                        updated.push(visitedNode);
-                    }
-                }
-            }
-        }
-        return updated || nodes;
-    }
-    ts.visitNodes = visitNodes;
-    function visitEachChild(node, visitor, context) {
-        if (node === undefined) {
-            return undefined;
-        }
-        var kind = node.kind;
-        // No need to visit nodes with no children.
-        if ((kind > 0 /* FirstToken */ && kind <= 138 /* LastToken */)) {
-            return node;
-        }
-        // We do not yet support types.
-        if ((kind >= 154 /* TypePredicate */ && kind <= 166 /* LiteralType */)) {
-            return node;
-        }
-        switch (node.kind) {
-            case 198 /* SemicolonClassElement */:
-            case 201 /* EmptyStatement */:
-            case 193 /* OmittedExpression */:
-            case 217 /* DebuggerStatement */:
-                // No need to visit nodes with no children.
-                return node;
-            // Names
-            case 140 /* ComputedPropertyName */:
-                return ts.updateComputedPropertyName(node, visitNode(node.expression, visitor, ts.isExpression));
-            // Signature elements
-            case 142 /* Parameter */:
-                return ts.updateParameterDeclaration(node, visitNodes(node.decorators, visitor, ts.isDecorator), visitNodes(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isBindingName), visitNode(node.type, visitor, ts.isTypeNode, /*optional*/ true), visitNode(node.initializer, visitor, ts.isExpression, /*optional*/ true));
-            // Type member
-            case 145 /* PropertyDeclaration */:
-                return ts.updateProperty(node, visitNodes(node.decorators, visitor, ts.isDecorator), visitNodes(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isPropertyName), visitNode(node.type, visitor, ts.isTypeNode, /*optional*/ true), visitNode(node.initializer, visitor, ts.isExpression, /*optional*/ true));
-            case 147 /* MethodDeclaration */:
-                return ts.updateMethod(node, visitNodes(node.decorators, visitor, ts.isDecorator), visitNodes(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isPropertyName), visitNodes(node.typeParameters, visitor, ts.isTypeParameter), (context.startLexicalEnvironment(), visitNodes(node.parameters, visitor, ts.isParameter)), visitNode(node.type, visitor, ts.isTypeNode, /*optional*/ true), mergeFunctionBodyLexicalEnvironment(visitNode(node.body, visitor, ts.isFunctionBody, /*optional*/ true), context.endLexicalEnvironment()));
-            case 148 /* Constructor */:
-                return ts.updateConstructor(node, visitNodes(node.decorators, visitor, ts.isDecorator), visitNodes(node.modifiers, visitor, ts.isModifier), (context.startLexicalEnvironment(), visitNodes(node.parameters, visitor, ts.isParameter)), mergeFunctionBodyLexicalEnvironment(visitNode(node.body, visitor, ts.isFunctionBody, /*optional*/ true), context.endLexicalEnvironment()));
-            case 149 /* GetAccessor */:
-                return ts.updateGetAccessor(node, visitNodes(node.decorators, visitor, ts.isDecorator), visitNodes(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isPropertyName), (context.startLexicalEnvironment(), visitNodes(node.parameters, visitor, ts.isParameter)), visitNode(node.type, visitor, ts.isTypeNode, /*optional*/ true), mergeFunctionBodyLexicalEnvironment(visitNode(node.body, visitor, ts.isFunctionBody, /*optional*/ true), context.endLexicalEnvironment()));
-            case 150 /* SetAccessor */:
-                return ts.updateSetAccessor(node, visitNodes(node.decorators, visitor, ts.isDecorator), visitNodes(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isPropertyName), (context.startLexicalEnvironment(), visitNodes(node.parameters, visitor, ts.isParameter)), mergeFunctionBodyLexicalEnvironment(visitNode(node.body, visitor, ts.isFunctionBody, /*optional*/ true), context.endLexicalEnvironment()));
-            // Binding patterns
-            case 167 /* ObjectBindingPattern */:
-                return ts.updateObjectBindingPattern(node, visitNodes(node.elements, visitor, ts.isBindingElement));
-            case 168 /* ArrayBindingPattern */:
-                return ts.updateArrayBindingPattern(node, visitNodes(node.elements, visitor, ts.isArrayBindingElement));
-            case 169 /* BindingElement */:
-                return ts.updateBindingElement(node, visitNode(node.propertyName, visitor, ts.isPropertyName, /*optional*/ true), visitNode(node.name, visitor, ts.isBindingName), visitNode(node.initializer, visitor, ts.isExpression, /*optional*/ true));
-            // Expression
-            case 170 /* ArrayLiteralExpression */:
-                return ts.updateArrayLiteral(node, visitNodes(node.elements, visitor, ts.isExpression));
-            case 171 /* ObjectLiteralExpression */:
-                return ts.updateObjectLiteral(node, visitNodes(node.properties, visitor, ts.isObjectLiteralElementLike));
-            case 172 /* PropertyAccessExpression */:
-                return ts.updatePropertyAccess(node, visitNode(node.expression, visitor, ts.isExpression), visitNode(node.name, visitor, ts.isIdentifier));
-            case 173 /* ElementAccessExpression */:
-                return ts.updateElementAccess(node, visitNode(node.expression, visitor, ts.isExpression), visitNode(node.argumentExpression, visitor, ts.isExpression));
-            case 174 /* CallExpression */:
-                return ts.updateCall(node, visitNode(node.expression, visitor, ts.isExpression), visitNodes(node.typeArguments, visitor, ts.isTypeNode), visitNodes(node.arguments, visitor, ts.isExpression));
-            case 175 /* NewExpression */:
-                return ts.updateNew(node, visitNode(node.expression, visitor, ts.isExpression), visitNodes(node.typeArguments, visitor, ts.isTypeNode), visitNodes(node.arguments, visitor, ts.isExpression));
-            case 176 /* TaggedTemplateExpression */:
-                return ts.updateTaggedTemplate(node, visitNode(node.tag, visitor, ts.isExpression), visitNode(node.template, visitor, ts.isTemplate));
-            case 178 /* ParenthesizedExpression */:
-                return ts.updateParen(node, visitNode(node.expression, visitor, ts.isExpression));
-            case 179 /* FunctionExpression */:
-                return ts.updateFunctionExpression(node, visitNode(node.name, visitor, ts.isPropertyName), visitNodes(node.typeParameters, visitor, ts.isTypeParameter), (context.startLexicalEnvironment(), visitNodes(node.parameters, visitor, ts.isParameter)), visitNode(node.type, visitor, ts.isTypeNode, /*optional*/ true), mergeFunctionBodyLexicalEnvironment(visitNode(node.body, visitor, ts.isFunctionBody, /*optional*/ true), context.endLexicalEnvironment()));
-            case 180 /* ArrowFunction */:
-                return ts.updateArrowFunction(node, visitNodes(node.modifiers, visitor, ts.isModifier), visitNodes(node.typeParameters, visitor, ts.isTypeParameter), (context.startLexicalEnvironment(), visitNodes(node.parameters, visitor, ts.isParameter)), visitNode(node.type, visitor, ts.isTypeNode, /*optional*/ true), mergeFunctionBodyLexicalEnvironment(visitNode(node.body, visitor, ts.isConciseBody, /*optional*/ true), context.endLexicalEnvironment()));
-            case 181 /* DeleteExpression */:
-                return ts.updateDelete(node, visitNode(node.expression, visitor, ts.isExpression));
-            case 182 /* TypeOfExpression */:
-                return ts.updateTypeOf(node, visitNode(node.expression, visitor, ts.isExpression));
-            case 183 /* VoidExpression */:
-                return ts.updateVoid(node, visitNode(node.expression, visitor, ts.isExpression));
-            case 184 /* AwaitExpression */:
-                return ts.updateAwait(node, visitNode(node.expression, visitor, ts.isExpression));
-            case 187 /* BinaryExpression */:
-                return ts.updateBinary(node, visitNode(node.left, visitor, ts.isExpression), visitNode(node.right, visitor, ts.isExpression));
-            case 185 /* PrefixUnaryExpression */:
-                return ts.updatePrefix(node, visitNode(node.operand, visitor, ts.isExpression));
-            case 186 /* PostfixUnaryExpression */:
-                return ts.updatePostfix(node, visitNode(node.operand, visitor, ts.isExpression));
-            case 188 /* ConditionalExpression */:
-                return ts.updateConditional(node, visitNode(node.condition, visitor, ts.isExpression), visitNode(node.whenTrue, visitor, ts.isExpression), visitNode(node.whenFalse, visitor, ts.isExpression));
-            case 189 /* TemplateExpression */:
-                return ts.updateTemplateExpression(node, visitNode(node.head, visitor, ts.isTemplateLiteralFragment), visitNodes(node.templateSpans, visitor, ts.isTemplateSpan));
-            case 190 /* YieldExpression */:
-                return ts.updateYield(node, visitNode(node.expression, visitor, ts.isExpression));
-            case 191 /* SpreadElementExpression */:
-                return ts.updateSpread(node, visitNode(node.expression, visitor, ts.isExpression));
-            case 192 /* ClassExpression */:
-                return ts.updateClassExpression(node, visitNodes(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isIdentifier, /*optional*/ true), visitNodes(node.typeParameters, visitor, ts.isTypeParameter), visitNodes(node.heritageClauses, visitor, ts.isHeritageClause), visitNodes(node.members, visitor, ts.isClassElement));
-            case 194 /* ExpressionWithTypeArguments */:
-                return ts.updateExpressionWithTypeArguments(node, visitNodes(node.typeArguments, visitor, ts.isTypeNode), visitNode(node.expression, visitor, ts.isExpression));
-            // Misc
-            case 197 /* TemplateSpan */:
-                return ts.updateTemplateSpan(node, visitNode(node.expression, visitor, ts.isExpression), visitNode(node.literal, visitor, ts.isTemplateLiteralFragment));
-            // Element
-            case 199 /* Block */:
-                return ts.updateBlock(node, visitNodes(node.statements, visitor, ts.isStatement));
-            case 200 /* VariableStatement */:
-                return ts.updateVariableStatement(node, visitNodes(node.modifiers, visitor, ts.isModifier), visitNode(node.declarationList, visitor, ts.isVariableDeclarationList));
-            case 202 /* ExpressionStatement */:
-                return ts.updateStatement(node, visitNode(node.expression, visitor, ts.isExpression));
-            case 203 /* IfStatement */:
-                return ts.updateIf(node, visitNode(node.expression, visitor, ts.isExpression), visitNode(node.thenStatement, visitor, ts.isStatement, /*optional*/ false, liftToBlock), visitNode(node.elseStatement, visitor, ts.isStatement, /*optional*/ true, liftToBlock));
-            case 204 /* DoStatement */:
-                return ts.updateDo(node, visitNode(node.statement, visitor, ts.isStatement, /*optional*/ false, liftToBlock), visitNode(node.expression, visitor, ts.isExpression));
-            case 205 /* WhileStatement */:
-                return ts.updateWhile(node, visitNode(node.expression, visitor, ts.isExpression), visitNode(node.statement, visitor, ts.isStatement, /*optional*/ false, liftToBlock));
-            case 206 /* ForStatement */:
-                return ts.updateFor(node, visitNode(node.initializer, visitor, ts.isForInitializer), visitNode(node.condition, visitor, ts.isExpression), visitNode(node.incrementor, visitor, ts.isExpression), visitNode(node.statement, visitor, ts.isStatement, /*optional*/ false, liftToBlock));
-            case 207 /* ForInStatement */:
-                return ts.updateForIn(node, visitNode(node.initializer, visitor, ts.isForInitializer), visitNode(node.expression, visitor, ts.isExpression), visitNode(node.statement, visitor, ts.isStatement, /*optional*/ false, liftToBlock));
-            case 208 /* ForOfStatement */:
-                return ts.updateForOf(node, visitNode(node.initializer, visitor, ts.isForInitializer), visitNode(node.expression, visitor, ts.isExpression), visitNode(node.statement, visitor, ts.isStatement, /*optional*/ false, liftToBlock));
-            case 209 /* ContinueStatement */:
-                return ts.updateContinue(node, visitNode(node.label, visitor, ts.isIdentifier, /*optional*/ true));
-            case 210 /* BreakStatement */:
-                return ts.updateBreak(node, visitNode(node.label, visitor, ts.isIdentifier, /*optional*/ true));
-            case 211 /* ReturnStatement */:
-                return ts.updateReturn(node, visitNode(node.expression, visitor, ts.isExpression, /*optional*/ true));
-            case 212 /* WithStatement */:
-                return ts.updateWith(node, visitNode(node.expression, visitor, ts.isExpression), visitNode(node.statement, visitor, ts.isStatement, /*optional*/ false, liftToBlock));
-            case 213 /* SwitchStatement */:
-                return ts.updateSwitch(node, visitNode(node.expression, visitor, ts.isExpression), visitNode(node.caseBlock, visitor, ts.isCaseBlock));
-            case 214 /* LabeledStatement */:
-                return ts.updateLabel(node, visitNode(node.label, visitor, ts.isIdentifier), visitNode(node.statement, visitor, ts.isStatement, /*optional*/ false, liftToBlock));
-            case 215 /* ThrowStatement */:
-                return ts.updateThrow(node, visitNode(node.expression, visitor, ts.isExpression));
-            case 216 /* TryStatement */:
-                return ts.updateTry(node, visitNode(node.tryBlock, visitor, ts.isBlock), visitNode(node.catchClause, visitor, ts.isCatchClause, /*optional*/ true), visitNode(node.finallyBlock, visitor, ts.isBlock, /*optional*/ true));
-            case 218 /* VariableDeclaration */:
-                return ts.updateVariableDeclaration(node, visitNode(node.name, visitor, ts.isBindingName), visitNode(node.type, visitor, ts.isTypeNode, /*optional*/ true), visitNode(node.initializer, visitor, ts.isExpression, /*optional*/ true));
-            case 219 /* VariableDeclarationList */:
-                return ts.updateVariableDeclarationList(node, visitNodes(node.declarations, visitor, ts.isVariableDeclaration));
-            case 220 /* FunctionDeclaration */:
-                return ts.updateFunctionDeclaration(node, visitNodes(node.decorators, visitor, ts.isDecorator), visitNodes(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isPropertyName), visitNodes(node.typeParameters, visitor, ts.isTypeParameter), (context.startLexicalEnvironment(), visitNodes(node.parameters, visitor, ts.isParameter)), visitNode(node.type, visitor, ts.isTypeNode, /*optional*/ true), mergeFunctionBodyLexicalEnvironment(visitNode(node.body, visitor, ts.isFunctionBody, /*optional*/ true), context.endLexicalEnvironment()));
-            case 221 /* ClassDeclaration */:
-                return ts.updateClassDeclaration(node, visitNodes(node.decorators, visitor, ts.isDecorator), visitNodes(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isIdentifier, /*optional*/ true), visitNodes(node.typeParameters, visitor, ts.isTypeParameter), visitNodes(node.heritageClauses, visitor, ts.isHeritageClause), visitNodes(node.members, visitor, ts.isClassElement));
-            case 227 /* CaseBlock */:
-                return ts.updateCaseBlock(node, visitNodes(node.clauses, visitor, ts.isCaseOrDefaultClause));
-            case 230 /* ImportDeclaration */:
-                return ts.updateImportDeclaration(node, visitNodes(node.decorators, visitor, ts.isDecorator), visitNodes(node.modifiers, visitor, ts.isModifier), visitNode(node.importClause, visitor, ts.isImportClause, /*optional*/ true), visitNode(node.moduleSpecifier, visitor, ts.isExpression));
-            case 231 /* ImportClause */:
-                return ts.updateImportClause(node, visitNode(node.name, visitor, ts.isIdentifier, /*optional*/ true), visitNode(node.namedBindings, visitor, ts.isNamedImportBindings, /*optional*/ true));
-            case 232 /* NamespaceImport */:
-                return ts.updateNamespaceImport(node, visitNode(node.name, visitor, ts.isIdentifier));
-            case 233 /* NamedImports */:
-                return ts.updateNamedImports(node, visitNodes(node.elements, visitor, ts.isImportSpecifier));
-            case 234 /* ImportSpecifier */:
-                return ts.updateImportSpecifier(node, visitNode(node.propertyName, visitor, ts.isIdentifier, /*optional*/ true), visitNode(node.name, visitor, ts.isIdentifier));
-            case 235 /* ExportAssignment */:
-                return ts.updateExportAssignment(node, visitNodes(node.decorators, visitor, ts.isDecorator), visitNodes(node.modifiers, visitor, ts.isModifier), visitNode(node.expression, visitor, ts.isExpression));
-            case 236 /* ExportDeclaration */:
-                return ts.updateExportDeclaration(node, visitNodes(node.decorators, visitor, ts.isDecorator), visitNodes(node.modifiers, visitor, ts.isModifier), visitNode(node.exportClause, visitor, ts.isNamedExports, /*optional*/ true), visitNode(node.moduleSpecifier, visitor, ts.isExpression, /*optional*/ true));
-            case 237 /* NamedExports */:
-                return ts.updateNamedExports(node, visitNodes(node.elements, visitor, ts.isExportSpecifier));
-            case 238 /* ExportSpecifier */:
-                return ts.updateExportSpecifier(node, visitNode(node.propertyName, visitor, ts.isIdentifier, /*optional*/ true), visitNode(node.name, visitor, ts.isIdentifier));
-            // JSX
-            case 241 /* JsxElement */:
-                return ts.updateJsxElement(node, visitNode(node.openingElement, visitor, ts.isJsxOpeningElement), visitNodes(node.children, visitor, ts.isJsxChild), visitNode(node.closingElement, visitor, ts.isJsxClosingElement));
-            case 242 /* JsxSelfClosingElement */:
-                return ts.updateJsxSelfClosingElement(node, visitNode(node.tagName, visitor, ts.isJsxTagNameExpression), visitNodes(node.attributes, visitor, ts.isJsxAttributeLike));
-            case 243 /* JsxOpeningElement */:
-                return ts.updateJsxOpeningElement(node, visitNode(node.tagName, visitor, ts.isJsxTagNameExpression), visitNodes(node.attributes, visitor, ts.isJsxAttributeLike));
-            case 245 /* JsxClosingElement */:
-                return ts.updateJsxClosingElement(node, visitNode(node.tagName, visitor, ts.isJsxTagNameExpression));
-            case 246 /* JsxAttribute */:
-                return ts.updateJsxAttribute(node, visitNode(node.name, visitor, ts.isIdentifier), visitNode(node.initializer, visitor, ts.isStringLiteralOrJsxExpression));
-            case 247 /* JsxSpreadAttribute */:
-                return ts.updateJsxSpreadAttribute(node, visitNode(node.expression, visitor, ts.isExpression));
-            case 248 /* JsxExpression */:
-                return ts.updateJsxExpression(node, visitNode(node.expression, visitor, ts.isExpression));
-            // Clauses
-            case 249 /* CaseClause */:
-                return ts.updateCaseClause(node, visitNode(node.expression, visitor, ts.isExpression), visitNodes(node.statements, visitor, ts.isStatement));
-            case 250 /* DefaultClause */:
-                return ts.updateDefaultClause(node, visitNodes(node.statements, visitor, ts.isStatement));
-            case 251 /* HeritageClause */:
-                return ts.updateHeritageClause(node, visitNodes(node.types, visitor, ts.isExpressionWithTypeArguments));
-            case 252 /* CatchClause */:
-                return ts.updateCatchClause(node, visitNode(node.variableDeclaration, visitor, ts.isVariableDeclaration), visitNode(node.block, visitor, ts.isBlock));
-            // Property assignments
-            case 253 /* PropertyAssignment */:
-                return ts.updatePropertyAssignment(node, visitNode(node.name, visitor, ts.isPropertyName), visitNode(node.initializer, visitor, ts.isExpression));
-            case 254 /* ShorthandPropertyAssignment */:
-                return ts.updateShorthandPropertyAssignment(node, visitNode(node.name, visitor, ts.isIdentifier), visitNode(node.objectAssignmentInitializer, visitor, ts.isExpression));
-            // Top-level nodes
-            case 256 /* SourceFile */:
-                context.startLexicalEnvironment();
-                return ts.updateSourceFileNode(node, ts.createNodeArray(ts.concatenate(visitNodes(node.statements, visitor, ts.isStatement), context.endLexicalEnvironment()), node.statements));
-            // Transformation nodes
-            case 288 /* PartiallyEmittedExpression */:
-                return ts.updatePartiallyEmittedExpression(node, visitNode(node.expression, visitor, ts.isExpression));
-            default:
-                var updated = void 0;
-                var edgeTraversalPath = nodeEdgeTraversalMap[kind];
-                if (edgeTraversalPath) {
-                    for (var _i = 0, edgeTraversalPath_2 = edgeTraversalPath; _i < edgeTraversalPath_2.length; _i++) {
-                        var edge = edgeTraversalPath_2[_i];
-                        var value = node[edge.name];
-                        if (value !== undefined) {
-                            var visited = ts.isArray(value)
-                                ? visitNodes(value, visitor, edge.test, 0, value.length, edge.parenthesize, node)
-                                : visitNode(value, visitor, edge.test, edge.optional, edge.lift, edge.parenthesize, node);
-                            if (updated !== undefined || visited !== value) {
-                                if (updated === undefined) {
-                                    updated = ts.getMutableClone(node);
-                                }
-                                if (visited !== value) {
-                                    updated[edge.name] = visited;
-                                }
-                            }
-                        }
-                    }
-                }
-                return updated ? ts.updateNode(updated, node) : node;
-        }
-        // return node;
-    }
-    ts.visitEachChild = visitEachChild;
-    function mergeFunctionBodyLexicalEnvironment(body, declarations) {
-        if (body && declarations !== undefined && declarations.length > 0) {
-            if (ts.isBlock(body)) {
-                return ts.updateBlock(body, ts.createNodeArray(ts.concatenate(body.statements, declarations), body.statements));
-            }
-            else {
-                return ts.createBlock(ts.createNodeArray([ts.createReturn(body, /*location*/ body)].concat(declarations), body), 
-                /*location*/ body, 
-                /*multiLine*/ true);
-            }
+    function mergeLexicalEnvironment(statements, declarations) {
+        if (!ts.some(declarations)) {
+            return statements;
         }
-        return body;
+        return ts.isNodeArray(statements)
+            ? ts.setTextRange(ts.createNodeArray(ts.concatenate(statements, declarations)), statements)
+            : ts.addRange(statements, declarations);
     }
-    ts.mergeFunctionBodyLexicalEnvironment = mergeFunctionBodyLexicalEnvironment;
+    ts.mergeLexicalEnvironment = mergeLexicalEnvironment;
     /**
      * Lifts a NodeArray containing only Statement nodes to a block.
      *
@@ -44755,15 +53569,6 @@ var ts;
         return ts.singleOrUndefined(nodes) || ts.createBlock(nodes);
     }
     ts.liftToBlock = liftToBlock;
-    /**
-     * Extracts the single node from a NodeArray.
-     *
-     * @param nodes The NodeArray.
-     */
-    function extractSingleNode(nodes) {
-        Debug.assert(nodes.length <= 1, "Too many nodes written to output.");
-        return ts.singleOrUndefined(nodes);
-    }
     /**
      * Aggregates the TransformFlags for a Node and its subtree.
      */
@@ -44783,13 +53588,25 @@ var ts;
         if (node === undefined) {
             return 0 /* None */;
         }
-        else if (node.transformFlags & 536870912 /* HasComputedFlags */) {
-            return node.transformFlags & ~getTransformFlagsSubtreeExclusions(node.kind);
+        if (node.transformFlags & 536870912 /* HasComputedFlags */) {
+            return node.transformFlags & ~ts.getTransformFlagsSubtreeExclusions(node.kind);
         }
-        else {
-            var subtreeFlags = aggregateTransformFlagsForSubtree(node);
-            return ts.computeTransformFlagsForNode(node, subtreeFlags);
+        var subtreeFlags = aggregateTransformFlagsForSubtree(node);
+        return ts.computeTransformFlagsForNode(node, subtreeFlags);
+    }
+    function aggregateTransformFlagsForNodeArray(nodes) {
+        if (nodes === undefined) {
+            return 0 /* None */;
         }
+        var subtreeFlags = 0 /* None */;
+        var nodeArrayFlags = 0 /* None */;
+        for (var _i = 0, nodes_5 = nodes; _i < nodes_5.length; _i++) {
+            var node = nodes_5[_i];
+            subtreeFlags |= aggregateTransformFlagsForNode(node);
+            nodeArrayFlags |= node.transformFlags & ~536870912 /* HasComputedFlags */;
+        }
+        nodes.transformFlags = nodeArrayFlags | 536870912 /* HasComputedFlags */;
+        return subtreeFlags;
     }
     /**
      * Aggregates the transform flags for the subtree of a node.
@@ -44797,437 +53614,604 @@ var ts;
     function aggregateTransformFlagsForSubtree(node) {
         // We do not transform ambient declarations or types, so there is no need to
         // recursively aggregate transform flags.
-        if (ts.hasModifier(node, 2 /* Ambient */) || ts.isTypeNode(node)) {
+        if (ts.hasModifier(node, 2 /* Ambient */) || (ts.isTypeNode(node) && node.kind !== 201 /* ExpressionWithTypeArguments */)) {
             return 0 /* None */;
         }
         // Aggregate the transform flags of each child.
-        return reduceEachChild(node, aggregateTransformFlagsForChildNode, 0 /* None */);
+        return reduceEachChild(node, 0 /* None */, aggregateTransformFlagsForChildNode, aggregateTransformFlagsForChildNodes);
     }
     /**
      * Aggregates the TransformFlags of a child node with the TransformFlags of its
      * siblings.
      */
-    function aggregateTransformFlagsForChildNode(transformFlags, child) {
-        return transformFlags | aggregateTransformFlagsForNode(child);
+    function aggregateTransformFlagsForChildNode(transformFlags, node) {
+        return transformFlags | aggregateTransformFlagsForNode(node);
     }
-    /**
-     * Gets the transform flags to exclude when unioning the transform flags of a subtree.
-     *
-     * NOTE: This needs to be kept up-to-date with the exclusions used in `computeTransformFlagsForNode`.
-     *       For performance reasons, `computeTransformFlagsForNode` uses local constant values rather
-     *       than calling this function.
-     */
-    function getTransformFlagsSubtreeExclusions(kind) {
-        if (kind >= 154 /* FirstTypeNode */ && kind <= 166 /* LastTypeNode */) {
-            return -3 /* TypeExcludes */;
-        }
-        switch (kind) {
-            case 174 /* CallExpression */:
-            case 175 /* NewExpression */:
-            case 170 /* ArrayLiteralExpression */:
-                return 537133909 /* ArrayLiteralOrCallOrNewExcludes */;
-            case 225 /* ModuleDeclaration */:
-                return 546335573 /* ModuleExcludes */;
-            case 142 /* Parameter */:
-                return 538968917 /* ParameterExcludes */;
-            case 180 /* ArrowFunction */:
-                return 550710101 /* ArrowFunctionExcludes */;
-            case 179 /* FunctionExpression */:
-            case 220 /* FunctionDeclaration */:
-                return 550726485 /* FunctionExcludes */;
-            case 219 /* VariableDeclarationList */:
-                return 538968917 /* VariableDeclarationListExcludes */;
-            case 221 /* ClassDeclaration */:
-            case 192 /* ClassExpression */:
-                return 537590613 /* ClassExcludes */;
-            case 148 /* Constructor */:
-                return 550593365 /* ConstructorExcludes */;
-            case 147 /* MethodDeclaration */:
-            case 149 /* GetAccessor */:
-            case 150 /* SetAccessor */:
-                return 550593365 /* MethodOrAccessorExcludes */;
-            case 117 /* AnyKeyword */:
-            case 130 /* NumberKeyword */:
-            case 127 /* NeverKeyword */:
-            case 132 /* StringKeyword */:
-            case 120 /* BooleanKeyword */:
-            case 133 /* SymbolKeyword */:
-            case 103 /* VoidKeyword */:
-            case 141 /* TypeParameter */:
-            case 144 /* PropertySignature */:
-            case 146 /* MethodSignature */:
-            case 151 /* CallSignature */:
-            case 152 /* ConstructSignature */:
-            case 153 /* IndexSignature */:
-            case 222 /* InterfaceDeclaration */:
-            case 223 /* TypeAliasDeclaration */:
-                return -3 /* TypeExcludes */;
-            case 171 /* ObjectLiteralExpression */:
-                return 537430869 /* ObjectLiteralExcludes */;
-            default:
-                return 536871765 /* NodeExcludes */;
-        }
+    function aggregateTransformFlagsForChildNodes(transformFlags, nodes) {
+        return transformFlags | aggregateTransformFlagsForNodeArray(nodes);
     }
     var Debug;
     (function (Debug) {
-        Debug.failNotOptional = Debug.shouldAssert(1 /* Normal */)
-            ? function (message) { return Debug.assert(false, message || "Node not optional."); }
-            : function (message) { };
+        var isDebugInfoEnabled = false;
         Debug.failBadSyntaxKind = Debug.shouldAssert(1 /* Normal */)
-            ? function (node, message) { return Debug.assert(false, message || "Unexpected node.", function () { return "Node " + ts.formatSyntaxKind(node.kind) + " was unexpected."; }); }
-            : function (node, message) { };
+            ? function (node, message) { return Debug.fail((message || "Unexpected node.") + "\r\nNode " + ts.formatSyntaxKind(node.kind) + " was unexpected.", Debug.failBadSyntaxKind); }
+            : ts.noop;
+        Debug.assertEachNode = Debug.shouldAssert(1 /* Normal */)
+            ? function (nodes, test, message) { return Debug.assert(test === undefined || ts.every(nodes, test), message || "Unexpected node.", function () { return "Node array did not pass test '" + Debug.getFunctionName(test) + "'."; }, Debug.assertEachNode); }
+            : ts.noop;
         Debug.assertNode = Debug.shouldAssert(1 /* Normal */)
-            ? function (node, test, message) { return Debug.assert(test === undefined || test(node), message || "Unexpected node.", function () { return "Node " + ts.formatSyntaxKind(node.kind) + " did not pass test '" + getFunctionName(test) + "'."; }); }
-            : function (node, test, message) { };
-        function getFunctionName(func) {
-            if (typeof func !== "function") {
-                return "";
+            ? function (node, test, message) { return Debug.assert(test === undefined || test(node), message || "Unexpected node.", function () { return "Node " + ts.formatSyntaxKind(node.kind) + " did not pass test '" + Debug.getFunctionName(test) + "'."; }, Debug.assertNode); }
+            : ts.noop;
+        Debug.assertOptionalNode = Debug.shouldAssert(1 /* Normal */)
+            ? function (node, test, message) { return Debug.assert(test === undefined || node === undefined || test(node), message || "Unexpected node.", function () { return "Node " + ts.formatSyntaxKind(node.kind) + " did not pass test '" + Debug.getFunctionName(test) + "'."; }, Debug.assertOptionalNode); }
+            : ts.noop;
+        Debug.assertOptionalToken = Debug.shouldAssert(1 /* Normal */)
+            ? function (node, kind, message) { return Debug.assert(kind === undefined || node === undefined || node.kind === kind, message || "Unexpected node.", function () { return "Node " + ts.formatSyntaxKind(node.kind) + " was not a '" + ts.formatSyntaxKind(kind) + "' token."; }, Debug.assertOptionalToken); }
+            : ts.noop;
+        Debug.assertMissingNode = Debug.shouldAssert(1 /* Normal */)
+            ? function (node, message) { return Debug.assert(node === undefined, message || "Unexpected node.", function () { return "Node " + ts.formatSyntaxKind(node.kind) + " was unexpected'."; }, Debug.assertMissingNode); }
+            : ts.noop;
+        /**
+         * Injects debug information into frequently used types.
+         */
+        function enableDebugInfo() {
+            if (isDebugInfoEnabled)
+                return;
+            // Add additional properties in debug mode to assist with debugging.
+            Object.defineProperties(ts.objectAllocator.getSymbolConstructor().prototype, {
+                "__debugFlags": { get: function () { return ts.formatSymbolFlags(this.flags); } }
+            });
+            Object.defineProperties(ts.objectAllocator.getTypeConstructor().prototype, {
+                "__debugFlags": { get: function () { return ts.formatTypeFlags(this.flags); } },
+                "__debugObjectFlags": { get: function () { return this.flags & 32768 /* Object */ ? ts.formatObjectFlags(this.objectFlags) : ""; } },
+                "__debugTypeToString": { value: function () { return this.checker.typeToString(this); } },
+            });
+            var nodeConstructors = [
+                ts.objectAllocator.getNodeConstructor(),
+                ts.objectAllocator.getIdentifierConstructor(),
+                ts.objectAllocator.getTokenConstructor(),
+                ts.objectAllocator.getSourceFileConstructor()
+            ];
+            for (var _i = 0, nodeConstructors_1 = nodeConstructors; _i < nodeConstructors_1.length; _i++) {
+                var ctor = nodeConstructors_1[_i];
+                if (!ctor.prototype.hasOwnProperty("__debugKind")) {
+                    Object.defineProperties(ctor.prototype, {
+                        "__debugKind": { get: function () { return ts.formatSyntaxKind(this.kind); } },
+                        "__debugModifierFlags": { get: function () { return ts.formatModifierFlags(ts.getModifierFlagsNoCache(this)); } },
+                        "__debugTransformFlags": { get: function () { return ts.formatTransformFlags(this.transformFlags); } },
+                        "__debugEmitFlags": { get: function () { return ts.formatEmitFlags(ts.getEmitFlags(this)); } },
+                        "__debugGetText": {
+                            value: function (includeTrivia) {
+                                if (ts.nodeIsSynthesized(this))
+                                    return "";
+                                var parseNode = ts.getParseTreeNode(this);
+                                var sourceFile = parseNode && ts.getSourceFileOfNode(parseNode);
+                                return sourceFile ? ts.getSourceTextOfNodeFromSourceFile(sourceFile, parseNode, includeTrivia) : "";
+                            }
+                        }
+                    });
+                }
             }
-            else if (func.hasOwnProperty("name")) {
-                return func.name;
+            isDebugInfoEnabled = true;
+        }
+        Debug.enableDebugInfo = enableDebugInfo;
+    })(Debug = ts.Debug || (ts.Debug = {}));
+})(ts || (ts = {}));
+/* @internal */
+var ts;
+(function (ts) {
+    function getOriginalNodeId(node) {
+        node = ts.getOriginalNode(node);
+        return node ? ts.getNodeId(node) : 0;
+    }
+    ts.getOriginalNodeId = getOriginalNodeId;
+    function collectExternalModuleInfo(sourceFile, resolver, compilerOptions) {
+        var externalImports = [];
+        var exportSpecifiers = ts.createMultiMap();
+        var exportedBindings = [];
+        var uniqueExports = ts.createMap();
+        var exportedNames;
+        var hasExportDefault = false;
+        var exportEquals = undefined;
+        var hasExportStarsToExportValues = false;
+        for (var _i = 0, _a = sourceFile.statements; _i < _a.length; _i++) {
+            var node = _a[_i];
+            switch (node.kind) {
+                case 238 /* ImportDeclaration */:
+                    // import "mod"
+                    // import x from "mod"
+                    // import * as x from "mod"
+                    // import { x, y } from "mod"
+                    externalImports.push(node);
+                    break;
+                case 237 /* ImportEqualsDeclaration */:
+                    if (node.moduleReference.kind === 248 /* ExternalModuleReference */) {
+                        // import x = require("mod")
+                        externalImports.push(node);
+                    }
+                    break;
+                case 244 /* ExportDeclaration */:
+                    if (node.moduleSpecifier) {
+                        if (!node.exportClause) {
+                            // export * from "mod"
+                            externalImports.push(node);
+                            hasExportStarsToExportValues = true;
+                        }
+                        else {
+                            // export { x, y } from "mod"
+                            externalImports.push(node);
+                        }
+                    }
+                    else {
+                        // export { x, y }
+                        for (var _b = 0, _c = node.exportClause.elements; _b < _c.length; _b++) {
+                            var specifier = _c[_b];
+                            if (!uniqueExports.get(specifier.name.text)) {
+                                var name_42 = specifier.propertyName || specifier.name;
+                                exportSpecifiers.add(name_42.text, specifier);
+                                var decl = resolver.getReferencedImportDeclaration(name_42)
+                                    || resolver.getReferencedValueDeclaration(name_42);
+                                if (decl) {
+                                    multiMapSparseArrayAdd(exportedBindings, getOriginalNodeId(decl), specifier.name);
+                                }
+                                uniqueExports.set(specifier.name.text, true);
+                                exportedNames = ts.append(exportedNames, specifier.name);
+                            }
+                        }
+                    }
+                    break;
+                case 243 /* ExportAssignment */:
+                    if (node.isExportEquals && !exportEquals) {
+                        // export = x
+                        exportEquals = node;
+                    }
+                    break;
+                case 208 /* VariableStatement */:
+                    if (ts.hasModifier(node, 1 /* Export */)) {
+                        for (var _d = 0, _e = node.declarationList.declarations; _d < _e.length; _d++) {
+                            var decl = _e[_d];
+                            exportedNames = collectExportedVariableInfo(decl, uniqueExports, exportedNames);
+                        }
+                    }
+                    break;
+                case 228 /* FunctionDeclaration */:
+                    if (ts.hasModifier(node, 1 /* Export */)) {
+                        if (ts.hasModifier(node, 512 /* Default */)) {
+                            // export default function() { }
+                            if (!hasExportDefault) {
+                                multiMapSparseArrayAdd(exportedBindings, getOriginalNodeId(node), ts.getDeclarationName(node));
+                                hasExportDefault = true;
+                            }
+                        }
+                        else {
+                            // export function x() { }
+                            var name_43 = node.name;
+                            if (!uniqueExports.get(name_43.text)) {
+                                multiMapSparseArrayAdd(exportedBindings, getOriginalNodeId(node), name_43);
+                                uniqueExports.set(name_43.text, true);
+                                exportedNames = ts.append(exportedNames, name_43);
+                            }
+                        }
+                    }
+                    break;
+                case 229 /* ClassDeclaration */:
+                    if (ts.hasModifier(node, 1 /* Export */)) {
+                        if (ts.hasModifier(node, 512 /* Default */)) {
+                            // export default class { }
+                            if (!hasExportDefault) {
+                                multiMapSparseArrayAdd(exportedBindings, getOriginalNodeId(node), ts.getDeclarationName(node));
+                                hasExportDefault = true;
+                            }
+                        }
+                        else {
+                            // export class x { }
+                            var name_44 = node.name;
+                            if (!uniqueExports.get(name_44.text)) {
+                                multiMapSparseArrayAdd(exportedBindings, getOriginalNodeId(node), name_44);
+                                uniqueExports.set(name_44.text, true);
+                                exportedNames = ts.append(exportedNames, name_44);
+                            }
+                        }
+                    }
+                    break;
             }
-            else {
-                var text = Function.prototype.toString.call(func);
-                var match = /^function\s+([\w\$]+)\s*\(/.exec(text);
-                return match ? match[1] : "";
+        }
+        var externalHelpersModuleName = ts.getOrCreateExternalHelpersModuleNameIfNeeded(sourceFile, compilerOptions, hasExportStarsToExportValues);
+        var externalHelpersImportDeclaration = externalHelpersModuleName && ts.createImportDeclaration(
+        /*decorators*/ undefined, 
+        /*modifiers*/ undefined, ts.createImportClause(/*name*/ undefined, ts.createNamespaceImport(externalHelpersModuleName)), ts.createLiteral(ts.externalHelpersModuleNameText));
+        if (externalHelpersImportDeclaration) {
+            externalImports.unshift(externalHelpersImportDeclaration);
+        }
+        return { externalImports: externalImports, exportSpecifiers: exportSpecifiers, exportEquals: exportEquals, hasExportStarsToExportValues: hasExportStarsToExportValues, exportedBindings: exportedBindings, exportedNames: exportedNames, externalHelpersImportDeclaration: externalHelpersImportDeclaration };
+    }
+    ts.collectExternalModuleInfo = collectExternalModuleInfo;
+    function collectExportedVariableInfo(decl, uniqueExports, exportedNames) {
+        if (ts.isBindingPattern(decl.name)) {
+            for (var _i = 0, _a = decl.name.elements; _i < _a.length; _i++) {
+                var element = _a[_i];
+                if (!ts.isOmittedExpression(element)) {
+                    exportedNames = collectExportedVariableInfo(element, uniqueExports, exportedNames);
+                }
             }
         }
-    })(Debug = ts.Debug || (ts.Debug = {}));
-    var _a;
+        else if (!ts.isGeneratedIdentifier(decl.name)) {
+            if (!uniqueExports.get(decl.name.text)) {
+                uniqueExports.set(decl.name.text, true);
+                exportedNames = ts.append(exportedNames, decl.name);
+            }
+        }
+        return exportedNames;
+    }
+    /** Use a sparse array as a multi-map. */
+    function multiMapSparseArrayAdd(map, key, value) {
+        var values = map[key];
+        if (values) {
+            values.push(value);
+        }
+        else {
+            map[key] = values = [value];
+        }
+        return values;
+    }
 })(ts || (ts = {}));
 /// <reference path="../factory.ts" />
 /// <reference path="../visitor.ts" />
 /*@internal*/
 var ts;
 (function (ts) {
+    var FlattenLevel;
+    (function (FlattenLevel) {
+        FlattenLevel[FlattenLevel["All"] = 0] = "All";
+        FlattenLevel[FlattenLevel["ObjectRest"] = 1] = "ObjectRest";
+    })(FlattenLevel = ts.FlattenLevel || (ts.FlattenLevel = {}));
     /**
-     * Flattens a destructuring assignment expression.
+     * Flattens a DestructuringAssignment or a VariableDeclaration to an expression.
      *
-     * @param root The destructuring assignment expression.
-     * @param needsValue Indicates whether the value from the right-hand-side of the
-     *                   destructuring assignment is needed as part of a larger expression.
-     * @param recordTempVariable A callback used to record new temporary variables.
-     * @param visitor An optional visitor to use to visit expressions.
+     * @param node The node to flatten.
+     * @param visitor An optional visitor used to visit initializers.
+     * @param context The transformation context.
+     * @param level Indicates the extent to which flattening should occur.
+     * @param needsValue An optional value indicating whether the value from the right-hand-side of
+     * the destructuring assignment is needed as part of a larger expression.
+     * @param createAssignmentCallback An optional callback used to create the assignment expression.
      */
-    function flattenDestructuringAssignment(context, node, needsValue, recordTempVariable, visitor) {
-        if (ts.isEmptyObjectLiteralOrArrayLiteral(node.left)) {
-            var right = node.right;
-            if (ts.isDestructuringAssignment(right)) {
-                return flattenDestructuringAssignment(context, right, needsValue, recordTempVariable, visitor);
+    function flattenDestructuringAssignment(node, visitor, context, level, needsValue, createAssignmentCallback) {
+        var location = node;
+        var value;
+        if (ts.isDestructuringAssignment(node)) {
+            value = node.right;
+            while (ts.isEmptyArrayLiteral(node.left) || ts.isEmptyObjectLiteral(node.left)) {
+                if (ts.isDestructuringAssignment(value)) {
+                    location = node = value;
+                    value = node.right;
+                }
+                else {
+                    return value;
+                }
+            }
+        }
+        var expressions;
+        var flattenContext = {
+            context: context,
+            level: level,
+            downlevelIteration: context.getCompilerOptions().downlevelIteration,
+            hoistTempVariables: true,
+            emitExpression: emitExpression,
+            emitBindingOrAssignment: emitBindingOrAssignment,
+            createArrayBindingOrAssignmentPattern: makeArrayAssignmentPattern,
+            createObjectBindingOrAssignmentPattern: makeObjectAssignmentPattern,
+            createArrayBindingOrAssignmentElement: makeAssignmentElement,
+            visitor: visitor
+        };
+        if (value) {
+            value = ts.visitNode(value, visitor, ts.isExpression);
+            if (needsValue) {
+                // If the right-hand value of the destructuring assignment needs to be preserved (as
+                // is the case when the destructuring assignment is part of a larger expression),
+                // then we need to cache the right-hand value.
+                //
+                // The source map location for the assignment should point to the entire binary
+                // expression.
+                value = ensureIdentifier(flattenContext, value, /*reuseIdentifierExpressions*/ true, location);
             }
-            else {
-                return node.right;
+            else if (ts.nodeIsSynthesized(node)) {
+                // Generally, the source map location for a destructuring assignment is the root
+                // expression.
+                //
+                // However, if the root expression is synthesized (as in the case
+                // of the initializer when transforming a ForOfStatement), then the source map
+                // location should point to the right-hand value of the expression.
+                location = value;
             }
         }
-        var location = node;
-        var value = node.right;
-        var expressions = [];
-        if (needsValue) {
-            // If the right-hand value of the destructuring assignment needs to be preserved (as
-            // is the case when the destructuring assignmen) is part of a larger expression),
-            // then we need to cache the right-hand value.
-            //
-            // The source map location for the assignment should point to the entire binary
-            // expression.
-            value = ensureIdentifier(value, /*reuseIdentifierExpressions*/ true, location, emitTempVariableAssignment, visitor);
-        }
-        else if (ts.nodeIsSynthesized(node)) {
-            // Generally, the source map location for a destructuring assignment is the root
-            // expression.
-            //
-            // However, if the root expression is synthesized (as in the case
-            // of the initializer when transforming a ForOfStatement), then the source map
-            // location should point to the right-hand value of the expression.
-            location = value;
-        }
-        flattenDestructuring(context, node, value, location, emitAssignment, emitTempVariableAssignment, visitor);
-        if (needsValue) {
+        flattenBindingOrAssignmentElement(flattenContext, node, value, location, /*skipInitializer*/ ts.isDestructuringAssignment(node));
+        if (value && needsValue) {
+            if (!ts.some(expressions)) {
+                return value;
+            }
             expressions.push(value);
         }
-        var expression = ts.inlineExpressions(expressions);
-        ts.aggregateTransformFlags(expression);
-        return expression;
-        function emitAssignment(name, value, location) {
-            var expression = ts.createAssignment(name, value, location);
+        return ts.aggregateTransformFlags(ts.inlineExpressions(expressions)) || ts.createOmittedExpression();
+        function emitExpression(expression) {
             // NOTE: this completely disables source maps, but aligns with the behavior of
             //       `emitAssignment` in the old emitter.
-            ts.setEmitFlags(expression, 2048 /* NoNestedSourceMaps */);
+            ts.setEmitFlags(expression, 64 /* NoNestedSourceMaps */);
             ts.aggregateTransformFlags(expression);
-            expressions.push(expression);
+            expressions = ts.append(expressions, expression);
         }
-        function emitTempVariableAssignment(value, location) {
-            var name = ts.createTempVariable(recordTempVariable);
-            emitAssignment(name, value, location);
-            return name;
+        function emitBindingOrAssignment(target, value, location, original) {
+            ts.Debug.assertNode(target, createAssignmentCallback ? ts.isIdentifier : ts.isExpression);
+            var expression = createAssignmentCallback
+                ? createAssignmentCallback(target, value, location)
+                : ts.setTextRange(ts.createAssignment(ts.visitNode(target, visitor, ts.isExpression), value), location);
+            expression.original = original;
+            emitExpression(expression);
         }
     }
     ts.flattenDestructuringAssignment = flattenDestructuringAssignment;
     /**
-     * Flattens binding patterns in a parameter declaration.
+     * Flattens a VariableDeclaration or ParameterDeclaration to one or more variable declarations.
      *
-     * @param node The ParameterDeclaration to flatten.
-     * @param value The rhs value for the binding pattern.
-     * @param visitor An optional visitor to use to visit expressions.
+     * @param node The node to flatten.
+     * @param visitor An optional visitor used to visit initializers.
+     * @param context The transformation context.
+     * @param boundValue The value bound to the declaration.
+     * @param skipInitializer A value indicating whether to ignore the initializer of `node`.
+     * @param hoistTempVariables Indicates whether temporary variables should not be recorded in-line.
+     * @param level Indicates the extent to which flattening should occur.
      */
-    function flattenParameterDestructuring(context, node, value, visitor) {
+    function flattenDestructuringBinding(node, visitor, context, level, rval, hoistTempVariables, skipInitializer) {
+        var pendingExpressions;
+        var pendingDeclarations = [];
         var declarations = [];
-        flattenDestructuring(context, node, value, node, emitAssignment, emitTempVariableAssignment, visitor);
-        return declarations;
-        function emitAssignment(name, value, location) {
-            var declaration = ts.createVariableDeclaration(name, /*type*/ undefined, value, location);
-            // NOTE: this completely disables source maps, but aligns with the behavior of
-            //       `emitAssignment` in the old emitter.
-            ts.setEmitFlags(declaration, 2048 /* NoNestedSourceMaps */);
-            ts.aggregateTransformFlags(declaration);
-            declarations.push(declaration);
+        var flattenContext = {
+            context: context,
+            level: level,
+            downlevelIteration: context.getCompilerOptions().downlevelIteration,
+            hoistTempVariables: hoistTempVariables,
+            emitExpression: emitExpression,
+            emitBindingOrAssignment: emitBindingOrAssignment,
+            createArrayBindingOrAssignmentPattern: makeArrayBindingPattern,
+            createObjectBindingOrAssignmentPattern: makeObjectBindingPattern,
+            createArrayBindingOrAssignmentElement: makeBindingElement,
+            visitor: visitor
+        };
+        flattenBindingOrAssignmentElement(flattenContext, node, rval, node, skipInitializer);
+        if (pendingExpressions) {
+            var temp = ts.createTempVariable(/*recordTempVariable*/ undefined);
+            if (hoistTempVariables) {
+                var value = ts.inlineExpressions(pendingExpressions);
+                pendingExpressions = undefined;
+                emitBindingOrAssignment(temp, value, /*location*/ undefined, /*original*/ undefined);
+            }
+            else {
+                context.hoistVariableDeclaration(temp);
+                var pendingDeclaration = ts.lastOrUndefined(pendingDeclarations);
+                pendingDeclaration.pendingExpressions = ts.append(pendingDeclaration.pendingExpressions, ts.createAssignment(temp, pendingDeclaration.value));
+                ts.addRange(pendingDeclaration.pendingExpressions, pendingExpressions);
+                pendingDeclaration.value = temp;
+            }
         }
-        function emitTempVariableAssignment(value, location) {
-            var name = ts.createTempVariable(/*recordTempVariable*/ undefined);
-            emitAssignment(name, value, location);
-            return name;
+        for (var _i = 0, pendingDeclarations_1 = pendingDeclarations; _i < pendingDeclarations_1.length; _i++) {
+            var _a = pendingDeclarations_1[_i], pendingExpressions_1 = _a.pendingExpressions, name_45 = _a.name, value = _a.value, location_2 = _a.location, original = _a.original;
+            var variable = ts.createVariableDeclaration(name_45, 
+            /*type*/ undefined, pendingExpressions_1 ? ts.inlineExpressions(ts.append(pendingExpressions_1, value)) : value);
+            variable.original = original;
+            ts.setTextRange(variable, location_2);
+            if (ts.isIdentifier(name_45)) {
+                ts.setEmitFlags(variable, 64 /* NoNestedSourceMaps */);
+            }
+            ts.aggregateTransformFlags(variable);
+            declarations.push(variable);
         }
-    }
-    ts.flattenParameterDestructuring = flattenParameterDestructuring;
-    /**
-     * Flattens binding patterns in a variable declaration.
-     *
-     * @param node The VariableDeclaration to flatten.
-     * @param value An optional rhs value for the binding pattern.
-     * @param visitor An optional visitor to use to visit expressions.
-     */
-    function flattenVariableDestructuring(context, node, value, visitor, recordTempVariable) {
-        var declarations = [];
-        var pendingAssignments;
-        flattenDestructuring(context, node, value, node, emitAssignment, emitTempVariableAssignment, visitor);
         return declarations;
-        function emitAssignment(name, value, location, original) {
-            if (pendingAssignments) {
-                pendingAssignments.push(value);
-                value = ts.inlineExpressions(pendingAssignments);
-                pendingAssignments = undefined;
-            }
-            var declaration = ts.createVariableDeclaration(name, /*type*/ undefined, value, location);
-            declaration.original = original;
-            // NOTE: this completely disables source maps, but aligns with the behavior of
-            //       `emitAssignment` in the old emitter.
-            ts.setEmitFlags(declaration, 2048 /* NoNestedSourceMaps */);
-            declarations.push(declaration);
-            ts.aggregateTransformFlags(declaration);
+        function emitExpression(value) {
+            pendingExpressions = ts.append(pendingExpressions, value);
         }
-        function emitTempVariableAssignment(value, location) {
-            var name = ts.createTempVariable(recordTempVariable);
-            if (recordTempVariable) {
-                var assignment = ts.createAssignment(name, value, location);
-                if (pendingAssignments) {
-                    pendingAssignments.push(assignment);
-                }
-                else {
-                    pendingAssignments = [assignment];
-                }
-            }
-            else {
-                emitAssignment(name, value, location, /*original*/ undefined);
+        function emitBindingOrAssignment(target, value, location, original) {
+            ts.Debug.assertNode(target, ts.isBindingName);
+            if (pendingExpressions) {
+                value = ts.inlineExpressions(ts.append(pendingExpressions, value));
+                pendingExpressions = undefined;
             }
-            return name;
+            pendingDeclarations.push({ pendingExpressions: pendingExpressions, name: target, value: value, location: location, original: original });
         }
     }
-    ts.flattenVariableDestructuring = flattenVariableDestructuring;
+    ts.flattenDestructuringBinding = flattenDestructuringBinding;
     /**
-     * Flattens binding patterns in a variable declaration and transforms them into an expression.
+     * Flattens a BindingOrAssignmentElement into zero or more bindings or assignments.
      *
-     * @param node The VariableDeclaration to flatten.
-     * @param recordTempVariable A callback used to record new temporary variables.
-     * @param nameSubstitution An optional callback used to substitute binding names.
-     * @param visitor An optional visitor to use to visit expressions.
+     * @param flattenContext Options used to control flattening.
+     * @param element The element to flatten.
+     * @param value The current RHS value to assign to the element.
+     * @param location The location to use for source maps and comments.
+     * @param skipInitializer An optional value indicating whether to include the initializer
+     * for the element.
      */
-    function flattenVariableDestructuringToExpression(context, node, recordTempVariable, nameSubstitution, visitor) {
-        var pendingAssignments = [];
-        flattenDestructuring(context, node, /*value*/ undefined, node, emitAssignment, emitTempVariableAssignment, visitor);
-        var expression = ts.inlineExpressions(pendingAssignments);
-        ts.aggregateTransformFlags(expression);
-        return expression;
-        function emitAssignment(name, value, location, original) {
-            var left = nameSubstitution && nameSubstitution(name) || name;
-            emitPendingAssignment(left, value, location, original);
-        }
-        function emitTempVariableAssignment(value, location) {
-            var name = ts.createTempVariable(recordTempVariable);
-            emitPendingAssignment(name, value, location, /*original*/ undefined);
-            return name;
-        }
-        function emitPendingAssignment(name, value, location, original) {
-            var expression = ts.createAssignment(name, value, location);
-            expression.original = original;
-            // NOTE: this completely disables source maps, but aligns with the behavior of
-            //       `emitAssignment` in the old emitter.
-            ts.setEmitFlags(expression, 2048 /* NoNestedSourceMaps */);
-            pendingAssignments.push(expression);
-            return expression;
-        }
-    }
-    ts.flattenVariableDestructuringToExpression = flattenVariableDestructuringToExpression;
-    function flattenDestructuring(context, root, value, location, emitAssignment, emitTempVariableAssignment, visitor) {
-        if (value && visitor) {
-            value = ts.visitNode(value, visitor, ts.isExpression);
-        }
-        if (ts.isBinaryExpression(root)) {
-            emitDestructuringAssignment(root.left, value, location);
-        }
-        else {
-            emitBindingElement(root, value);
-        }
-        function emitDestructuringAssignment(bindingTarget, value, location) {
-            // When emitting target = value use source map node to highlight, including any temporary assignments needed for this
-            var target;
-            if (ts.isShorthandPropertyAssignment(bindingTarget)) {
-                var initializer = visitor
-                    ? ts.visitNode(bindingTarget.objectAssignmentInitializer, visitor, ts.isExpression)
-                    : bindingTarget.objectAssignmentInitializer;
-                if (initializer) {
-                    value = createDefaultValueCheck(value, initializer, location);
-                }
-                target = bindingTarget.name;
-            }
-            else if (ts.isBinaryExpression(bindingTarget) && bindingTarget.operatorToken.kind === 56 /* EqualsToken */) {
-                var initializer = visitor
-                    ? ts.visitNode(bindingTarget.right, visitor, ts.isExpression)
-                    : bindingTarget.right;
-                value = createDefaultValueCheck(value, initializer, location);
-                target = bindingTarget.left;
-            }
-            else {
-                target = bindingTarget;
-            }
-            if (target.kind === 171 /* ObjectLiteralExpression */) {
-                emitObjectLiteralAssignment(target, value, location);
-            }
-            else if (target.kind === 170 /* ArrayLiteralExpression */) {
-                emitArrayLiteralAssignment(target, value, location);
-            }
-            else {
-                var name_29 = ts.getMutableClone(target);
-                ts.setSourceMapRange(name_29, target);
-                ts.setCommentRange(name_29, target);
-                emitAssignment(name_29, value, location, /*original*/ undefined);
-            }
-        }
-        function emitObjectLiteralAssignment(target, value, location) {
-            var properties = target.properties;
-            if (properties.length !== 1) {
-                // For anything but a single element destructuring we need to generate a temporary
-                // to ensure value is evaluated exactly once.
-                // When doing so we want to hightlight the passed in source map node since thats the one needing this temp assignment
-                value = ensureIdentifier(value, /*reuseIdentifierExpressions*/ true, location, emitTempVariableAssignment);
-            }
-            for (var _i = 0, properties_6 = properties; _i < properties_6.length; _i++) {
-                var p = properties_6[_i];
-                if (p.kind === 253 /* PropertyAssignment */ || p.kind === 254 /* ShorthandPropertyAssignment */) {
-                    var propName = p.name;
-                    var target_1 = p.kind === 254 /* ShorthandPropertyAssignment */ ? p : p.initializer || propName;
-                    // Assignment for target = value.propName should highligh whole property, hence use p as source map node
-                    emitDestructuringAssignment(target_1, createDestructuringPropertyAccess(value, propName), p);
-                }
-            }
-        }
-        function emitArrayLiteralAssignment(target, value, location) {
-            var elements = target.elements;
-            var numElements = elements.length;
-            if (numElements !== 1) {
-                // For anything but a single element destructuring we need to generate a temporary
-                // to ensure value is evaluated exactly once.
-                // When doing so we want to hightlight the passed in source map node since thats the one needing this temp assignment
-                value = ensureIdentifier(value, /*reuseIdentifierExpressions*/ true, location, emitTempVariableAssignment);
-            }
-            for (var i = 0; i < numElements; i++) {
-                var e = elements[i];
-                if (e.kind !== 193 /* OmittedExpression */) {
-                    // Assignment for target = value.propName should highligh whole property, hence use e as source map node
-                    if (e.kind !== 191 /* SpreadElementExpression */) {
-                        emitDestructuringAssignment(e, ts.createElementAccess(value, ts.createLiteral(i)), e);
-                    }
-                    else if (i === numElements - 1) {
-                        emitDestructuringAssignment(e.expression, ts.createArraySlice(value, i), e);
-                    }
-                }
-            }
-        }
-        function emitBindingElement(target, value) {
-            // Any temporary assignments needed to emit target = value should point to target
-            var initializer = visitor ? ts.visitNode(target.initializer, visitor, ts.isExpression) : target.initializer;
+    function flattenBindingOrAssignmentElement(flattenContext, element, value, location, skipInitializer) {
+        if (!skipInitializer) {
+            var initializer = ts.visitNode(ts.getInitializerOfBindingOrAssignmentElement(element), flattenContext.visitor, ts.isExpression);
             if (initializer) {
                 // Combine value and initializer
-                value = value ? createDefaultValueCheck(value, initializer, target) : initializer;
+                value = value ? createDefaultValueCheck(flattenContext, value, initializer, location) : initializer;
             }
             else if (!value) {
                 // Use 'void 0' in absence of value and initializer
                 value = ts.createVoidZero();
             }
-            var name = target.name;
-            if (ts.isBindingPattern(name)) {
-                var elements = name.elements;
-                var numElements = elements.length;
-                if (numElements !== 1) {
-                    // For anything other than a single-element destructuring we need to generate a temporary
-                    // to ensure value is evaluated exactly once. Additionally, if we have zero elements
-                    // we need to emit *something* to ensure that in case a 'var' keyword was already emitted,
-                    // so in that case, we'll intentionally create that temporary.
-                    value = ensureIdentifier(value, /*reuseIdentifierExpressions*/ numElements !== 0, target, emitTempVariableAssignment);
-                }
-                for (var i = 0; i < numElements; i++) {
-                    var element = elements[i];
-                    if (ts.isOmittedExpression(element)) {
-                        continue;
-                    }
-                    else if (name.kind === 167 /* ObjectBindingPattern */) {
-                        // Rewrite element to a declaration with an initializer that fetches property
-                        var propName = element.propertyName || element.name;
-                        emitBindingElement(element, createDestructuringPropertyAccess(value, propName));
+        }
+        var bindingTarget = ts.getTargetOfBindingOrAssignmentElement(element);
+        if (ts.isObjectBindingOrAssignmentPattern(bindingTarget)) {
+            flattenObjectBindingOrAssignmentPattern(flattenContext, element, bindingTarget, value, location);
+        }
+        else if (ts.isArrayBindingOrAssignmentPattern(bindingTarget)) {
+            flattenArrayBindingOrAssignmentPattern(flattenContext, element, bindingTarget, value, location);
+        }
+        else {
+            flattenContext.emitBindingOrAssignment(bindingTarget, value, location, /*original*/ element);
+        }
+    }
+    /**
+     * Flattens an ObjectBindingOrAssignmentPattern into zero or more bindings or assignments.
+     *
+     * @param flattenContext Options used to control flattening.
+     * @param parent The parent element of the pattern.
+     * @param pattern The ObjectBindingOrAssignmentPattern to flatten.
+     * @param value The current RHS value to assign to the element.
+     * @param location The location to use for source maps and comments.
+     */
+    function flattenObjectBindingOrAssignmentPattern(flattenContext, parent, pattern, value, location) {
+        var elements = ts.getElementsOfBindingOrAssignmentPattern(pattern);
+        var numElements = elements.length;
+        if (numElements !== 1) {
+            // For anything other than a single-element destructuring we need to generate a temporary
+            // to ensure value is evaluated exactly once. Additionally, if we have zero elements
+            // we need to emit *something* to ensure that in case a 'var' keyword was already emitted,
+            // so in that case, we'll intentionally create that temporary.
+            var reuseIdentifierExpressions = !ts.isDeclarationBindingElement(parent) || numElements !== 0;
+            value = ensureIdentifier(flattenContext, value, reuseIdentifierExpressions, location);
+        }
+        var bindingElements;
+        var computedTempVariables;
+        for (var i = 0; i < numElements; i++) {
+            var element = elements[i];
+            if (!ts.getRestIndicatorOfBindingOrAssignmentElement(element)) {
+                var propertyName = ts.getPropertyNameOfBindingOrAssignmentElement(element);
+                if (flattenContext.level >= 1 /* ObjectRest */
+                    && !(element.transformFlags & (524288 /* ContainsRest */ | 1048576 /* ContainsObjectRest */))
+                    && !(ts.getTargetOfBindingOrAssignmentElement(element).transformFlags & (524288 /* ContainsRest */ | 1048576 /* ContainsObjectRest */))
+                    && !ts.isComputedPropertyName(propertyName)) {
+                    bindingElements = ts.append(bindingElements, element);
+                }
+                else {
+                    if (bindingElements) {
+                        flattenContext.emitBindingOrAssignment(flattenContext.createObjectBindingOrAssignmentPattern(bindingElements), value, location, pattern);
+                        bindingElements = undefined;
                     }
-                    else {
-                        if (!element.dotDotDotToken) {
-                            // Rewrite element to a declaration that accesses array element at index i
-                            emitBindingElement(element, ts.createElementAccess(value, i));
-                        }
-                        else if (i === numElements - 1) {
-                            emitBindingElement(element, ts.createArraySlice(value, i));
-                        }
+                    var rhsValue = createDestructuringPropertyAccess(flattenContext, value, propertyName);
+                    if (ts.isComputedPropertyName(propertyName)) {
+                        computedTempVariables = ts.append(computedTempVariables, rhsValue.argumentExpression);
                     }
+                    flattenBindingOrAssignmentElement(flattenContext, element, rhsValue, /*location*/ element);
                 }
             }
-            else {
-                emitAssignment(name, value, target, target);
+            else if (i === numElements - 1) {
+                if (bindingElements) {
+                    flattenContext.emitBindingOrAssignment(flattenContext.createObjectBindingOrAssignmentPattern(bindingElements), value, location, pattern);
+                    bindingElements = undefined;
+                }
+                var rhsValue = createRestCall(flattenContext.context, value, elements, computedTempVariables, pattern);
+                flattenBindingOrAssignmentElement(flattenContext, element, rhsValue, element);
             }
         }
-        function createDefaultValueCheck(value, defaultValue, location) {
-            value = ensureIdentifier(value, /*reuseIdentifierExpressions*/ true, location, emitTempVariableAssignment);
-            return ts.createConditional(ts.createStrictEquality(value, ts.createVoidZero()), ts.createToken(53 /* QuestionToken */), defaultValue, ts.createToken(54 /* ColonToken */), value);
+        if (bindingElements) {
+            flattenContext.emitBindingOrAssignment(flattenContext.createObjectBindingOrAssignmentPattern(bindingElements), value, location, pattern);
         }
-        /**
-         * Creates either a PropertyAccessExpression or an ElementAccessExpression for the
-         * right-hand side of a transformed destructuring assignment.
-         *
-         * @param expression The right-hand expression that is the source of the property.
-         * @param propertyName The destructuring property name.
-         */
-        function createDestructuringPropertyAccess(expression, propertyName) {
-            if (ts.isComputedPropertyName(propertyName)) {
-                return ts.createElementAccess(expression, ensureIdentifier(propertyName.expression, /*reuseIdentifierExpressions*/ false, /*location*/ propertyName, emitTempVariableAssignment));
-            }
-            else if (ts.isLiteralExpression(propertyName)) {
-                var clone_2 = ts.getSynthesizedClone(propertyName);
-                clone_2.text = ts.unescapeIdentifier(clone_2.text);
-                return ts.createElementAccess(expression, clone_2);
-            }
-            else {
-                if (ts.isGeneratedIdentifier(propertyName)) {
-                    var clone_3 = ts.getSynthesizedClone(propertyName);
-                    clone_3.text = ts.unescapeIdentifier(clone_3.text);
-                    return ts.createPropertyAccess(expression, clone_3);
+    }
+    /**
+     * Flattens an ArrayBindingOrAssignmentPattern into zero or more bindings or assignments.
+     *
+     * @param flattenContext Options used to control flattening.
+     * @param parent The parent element of the pattern.
+     * @param pattern The ArrayBindingOrAssignmentPattern to flatten.
+     * @param value The current RHS value to assign to the element.
+     * @param location The location to use for source maps and comments.
+     */
+    function flattenArrayBindingOrAssignmentPattern(flattenContext, parent, pattern, value, location) {
+        var elements = ts.getElementsOfBindingOrAssignmentPattern(pattern);
+        var numElements = elements.length;
+        if (flattenContext.level < 1 /* ObjectRest */ && flattenContext.downlevelIteration) {
+            // Read the elements of the iterable into an array
+            value = ensureIdentifier(flattenContext, ts.createReadHelper(flattenContext.context, value, numElements > 0 && ts.getRestIndicatorOfBindingOrAssignmentElement(elements[numElements - 1])
+                ? undefined
+                : numElements, location), 
+            /*reuseIdentifierExpressions*/ false, location);
+        }
+        else if (numElements !== 1 && (flattenContext.level < 1 /* ObjectRest */ || numElements === 0)) {
+            // For anything other than a single-element destructuring we need to generate a temporary
+            // to ensure value is evaluated exactly once. Additionally, if we have zero elements
+            // we need to emit *something* to ensure that in case a 'var' keyword was already emitted,
+            // so in that case, we'll intentionally create that temporary.
+            var reuseIdentifierExpressions = !ts.isDeclarationBindingElement(parent) || numElements !== 0;
+            value = ensureIdentifier(flattenContext, value, reuseIdentifierExpressions, location);
+        }
+        var bindingElements;
+        var restContainingElements;
+        for (var i = 0; i < numElements; i++) {
+            var element = elements[i];
+            if (flattenContext.level >= 1 /* ObjectRest */) {
+                // If an array pattern contains an ObjectRest, we must cache the result so that we
+                // can perform the ObjectRest destructuring in a different declaration
+                if (element.transformFlags & 1048576 /* ContainsObjectRest */) {
+                    var temp = ts.createTempVariable(/*recordTempVariable*/ undefined);
+                    if (flattenContext.hoistTempVariables) {
+                        flattenContext.context.hoistVariableDeclaration(temp);
+                    }
+                    restContainingElements = ts.append(restContainingElements, [temp, element]);
+                    bindingElements = ts.append(bindingElements, flattenContext.createArrayBindingOrAssignmentElement(temp));
                 }
                 else {
-                    return ts.createPropertyAccess(expression, ts.createIdentifier(ts.unescapeIdentifier(propertyName.text)));
+                    bindingElements = ts.append(bindingElements, element);
                 }
             }
+            else if (ts.isOmittedExpression(element)) {
+                continue;
+            }
+            else if (!ts.getRestIndicatorOfBindingOrAssignmentElement(element)) {
+                var rhsValue = ts.createElementAccess(value, i);
+                flattenBindingOrAssignmentElement(flattenContext, element, rhsValue, /*location*/ element);
+            }
+            else if (i === numElements - 1) {
+                var rhsValue = ts.createArraySlice(value, i);
+                flattenBindingOrAssignmentElement(flattenContext, element, rhsValue, /*location*/ element);
+            }
+        }
+        if (bindingElements) {
+            flattenContext.emitBindingOrAssignment(flattenContext.createArrayBindingOrAssignmentPattern(bindingElements), value, location, pattern);
+        }
+        if (restContainingElements) {
+            for (var _i = 0, restContainingElements_1 = restContainingElements; _i < restContainingElements_1.length; _i++) {
+                var _a = restContainingElements_1[_i], id = _a[0], element = _a[1];
+                flattenBindingOrAssignmentElement(flattenContext, element, id, element);
+            }
+        }
+    }
+    /**
+     * Creates an expression used to provide a default value if a value is `undefined` at runtime.
+     *
+     * @param flattenContext Options used to control flattening.
+     * @param value The RHS value to test.
+     * @param defaultValue The default value to use if `value` is `undefined` at runtime.
+     * @param location The location to use for source maps and comments.
+     */
+    function createDefaultValueCheck(flattenContext, value, defaultValue, location) {
+        value = ensureIdentifier(flattenContext, value, /*reuseIdentifierExpressions*/ true, location);
+        return ts.createConditional(ts.createTypeCheck(value, "undefined"), defaultValue, value);
+    }
+    /**
+     * Creates either a PropertyAccessExpression or an ElementAccessExpression for the
+     * right-hand side of a transformed destructuring assignment.
+     *
+     * @link https://tc39.github.io/ecma262/#sec-runtime-semantics-keyeddestructuringassignmentevaluation
+     *
+     * @param flattenContext Options used to control flattening.
+     * @param value The RHS value that is the source of the property.
+     * @param propertyName The destructuring property name.
+     */
+    function createDestructuringPropertyAccess(flattenContext, value, propertyName) {
+        if (ts.isComputedPropertyName(propertyName)) {
+            var argumentExpression = ensureIdentifier(flattenContext, propertyName.expression, /*reuseIdentifierExpressions*/ false, /*location*/ propertyName);
+            return ts.createElementAccess(value, argumentExpression);
+        }
+        else if (ts.isStringOrNumericLiteral(propertyName)) {
+            var argumentExpression = ts.getSynthesizedClone(propertyName);
+            argumentExpression.text = ts.unescapeIdentifier(argumentExpression.text);
+            return ts.createElementAccess(value, argumentExpression);
+        }
+        else {
+            var name_46 = ts.createIdentifier(ts.unescapeIdentifier(propertyName.text));
+            return ts.createPropertyAccess(value, name_46);
         }
     }
     /**
@@ -45235,23 +54219,79 @@ var ts;
      * This function is useful to ensure that the expression's value can be read from in subsequent expressions.
      * Unless 'reuseIdentifierExpressions' is false, 'value' will be returned if it is just an identifier.
      *
+     * @param flattenContext Options used to control flattening.
      * @param value the expression whose value needs to be bound.
      * @param reuseIdentifierExpressions true if identifier expressions can simply be returned;
-     *                                   false if it is necessary to always emit an identifier.
+     * false if it is necessary to always emit an identifier.
      * @param location The location to use for source maps and comments.
-     * @param emitTempVariableAssignment A callback used to emit a temporary variable.
-     * @param visitor An optional callback used to visit the value.
      */
-    function ensureIdentifier(value, reuseIdentifierExpressions, location, emitTempVariableAssignment, visitor) {
+    function ensureIdentifier(flattenContext, value, reuseIdentifierExpressions, location) {
         if (ts.isIdentifier(value) && reuseIdentifierExpressions) {
             return value;
         }
         else {
-            if (visitor) {
-                value = ts.visitNode(value, visitor, ts.isExpression);
+            var temp = ts.createTempVariable(/*recordTempVariable*/ undefined);
+            if (flattenContext.hoistTempVariables) {
+                flattenContext.context.hoistVariableDeclaration(temp);
+                flattenContext.emitExpression(ts.setTextRange(ts.createAssignment(temp, value), location));
+            }
+            else {
+                flattenContext.emitBindingOrAssignment(temp, value, location, /*original*/ undefined);
+            }
+            return temp;
+        }
+    }
+    function makeArrayBindingPattern(elements) {
+        ts.Debug.assertEachNode(elements, ts.isArrayBindingElement);
+        return ts.createArrayBindingPattern(elements);
+    }
+    function makeArrayAssignmentPattern(elements) {
+        return ts.createArrayLiteral(ts.map(elements, ts.convertToArrayAssignmentElement));
+    }
+    function makeObjectBindingPattern(elements) {
+        ts.Debug.assertEachNode(elements, ts.isBindingElement);
+        return ts.createObjectBindingPattern(elements);
+    }
+    function makeObjectAssignmentPattern(elements) {
+        return ts.createObjectLiteral(ts.map(elements, ts.convertToObjectAssignmentElement));
+    }
+    function makeBindingElement(name) {
+        return ts.createBindingElement(/*dotDotDotToken*/ undefined, /*propertyName*/ undefined, name);
+    }
+    function makeAssignmentElement(name) {
+        return name;
+    }
+    var restHelper = {
+        name: "typescript:rest",
+        scoped: false,
+        text: "\n            var __rest = (this && this.__rest) || function (s, e) {\n                var t = {};\n                for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)\n                    t[p] = s[p];\n                if (s != null && typeof Object.getOwnPropertySymbols === \"function\")\n                    for (var i = 0, p = Object.getOwnPropertySymbols(s); i < p.length; i++) if (e.indexOf(p[i]) < 0)\n                        t[p[i]] = s[p[i]];\n                return t;\n            };"
+    };
+    /** Given value: o, propName: p, pattern: { a, b, ...p } from the original statement
+     * `{ a, b, ...p } = o`, create `p = __rest(o, ["a", "b"]);`
+     */
+    function createRestCall(context, value, elements, computedTempVariables, location) {
+        context.requestEmitHelper(restHelper);
+        var propertyNames = [];
+        var computedTempVariableOffset = 0;
+        for (var i = 0; i < elements.length - 1; i++) {
+            var propertyName = ts.getPropertyNameOfBindingOrAssignmentElement(elements[i]);
+            if (propertyName) {
+                if (ts.isComputedPropertyName(propertyName)) {
+                    var temp = computedTempVariables[computedTempVariableOffset];
+                    computedTempVariableOffset++;
+                    // typeof _tmp === "symbol" ? _tmp : _tmp + ""
+                    propertyNames.push(ts.createConditional(ts.createTypeCheck(temp, "symbol"), temp, ts.createAdd(temp, ts.createLiteral(""))));
+                }
+                else {
+                    propertyNames.push(ts.createLiteral(propertyName));
+                }
             }
-            return emitTempVariableAssignment(value, location);
         }
+        return ts.createCall(ts.getHelperName("__rest"), 
+        /*typeArguments*/ undefined, [
+            value,
+            ts.setTextRange(ts.createArrayLiteral(propertyNames), location)
+        ]);
     }
 })(ts || (ts = {}));
 /// <reference path="../factory.ts" />
@@ -45270,13 +54310,27 @@ var ts;
         TypeScriptSubstitutionFlags[TypeScriptSubstitutionFlags["ClassAliases"] = 1] = "ClassAliases";
         /** Enables substitutions for namespace exports. */
         TypeScriptSubstitutionFlags[TypeScriptSubstitutionFlags["NamespaceExports"] = 2] = "NamespaceExports";
-        /** Enables substitutions for async methods with `super` calls. */
-        TypeScriptSubstitutionFlags[TypeScriptSubstitutionFlags["AsyncMethodsWithSuper"] = 4] = "AsyncMethodsWithSuper";
         /* Enables substitutions for unqualified enum members */
         TypeScriptSubstitutionFlags[TypeScriptSubstitutionFlags["NonQualifiedEnumMembers"] = 8] = "NonQualifiedEnumMembers";
     })(TypeScriptSubstitutionFlags || (TypeScriptSubstitutionFlags = {}));
+    var ClassFacts;
+    (function (ClassFacts) {
+        ClassFacts[ClassFacts["None"] = 0] = "None";
+        ClassFacts[ClassFacts["HasStaticInitializedProperties"] = 1] = "HasStaticInitializedProperties";
+        ClassFacts[ClassFacts["HasConstructorDecorators"] = 2] = "HasConstructorDecorators";
+        ClassFacts[ClassFacts["HasMemberDecorators"] = 4] = "HasMemberDecorators";
+        ClassFacts[ClassFacts["IsExportOfNamespace"] = 8] = "IsExportOfNamespace";
+        ClassFacts[ClassFacts["IsNamedExternalExport"] = 16] = "IsNamedExternalExport";
+        ClassFacts[ClassFacts["IsDefaultExternalExport"] = 32] = "IsDefaultExternalExport";
+        ClassFacts[ClassFacts["HasExtendsClause"] = 64] = "HasExtendsClause";
+        ClassFacts[ClassFacts["UseImmediatelyInvokedFunctionExpression"] = 128] = "UseImmediatelyInvokedFunctionExpression";
+        ClassFacts[ClassFacts["HasAnyDecorators"] = 6] = "HasAnyDecorators";
+        ClassFacts[ClassFacts["NeedsName"] = 5] = "NeedsName";
+        ClassFacts[ClassFacts["MayNeedImmediatelyInvokedFunctionExpression"] = 7] = "MayNeedImmediatelyInvokedFunctionExpression";
+        ClassFacts[ClassFacts["IsExported"] = 56] = "IsExported";
+    })(ClassFacts || (ClassFacts = {}));
     function transformTypeScript(context) {
-        var startLexicalEnvironment = context.startLexicalEnvironment, endLexicalEnvironment = context.endLexicalEnvironment, hoistVariableDeclaration = context.hoistVariableDeclaration;
+        var startLexicalEnvironment = context.startLexicalEnvironment, resumeLexicalEnvironment = context.resumeLexicalEnvironment, endLexicalEnvironment = context.endLexicalEnvironment, hoistVariableDeclaration = context.hoistVariableDeclaration;
         var resolver = context.getEmitResolver();
         var compilerOptions = context.getCompilerOptions();
         var languageVersion = ts.getEmitScriptTarget(compilerOptions);
@@ -45288,15 +54342,14 @@ var ts;
         context.onEmitNode = onEmitNode;
         context.onSubstituteNode = onSubstituteNode;
         // Enable substitution for property/element access to emit const enum values.
-        context.enableSubstitution(172 /* PropertyAccessExpression */);
-        context.enableSubstitution(173 /* ElementAccessExpression */);
+        context.enableSubstitution(179 /* PropertyAccessExpression */);
+        context.enableSubstitution(180 /* ElementAccessExpression */);
         // These variables contain state that changes as we descend into the tree.
         var currentSourceFile;
         var currentNamespace;
         var currentNamespaceContainerName;
         var currentScope;
         var currentScopeFirstDeclarationsOfName;
-        var currentSourceFileExternalHelpersModuleName;
         /**
          * Keeps track of whether expression substitution has been enabled for specific edge cases.
          * They are persisted between each SourceFile transformation and should not be reset.
@@ -45312,11 +54365,6 @@ var ts;
          * just-in-time substitution while printing an expression identifier.
          */
         var applicableSubstitutions;
-        /**
-         * This keeps track of containers where `super` is valid, for use with
-         * just-in-time substitution for `super` expressions inside of async methods.
-         */
-        var currentSuperContainer;
         return transformSourceFile;
         /**
          * Transform TypeScript-specific syntax in a SourceFile.
@@ -45324,10 +54372,14 @@ var ts;
          * @param node A SourceFile node.
          */
         function transformSourceFile(node) {
-            if (ts.isDeclarationFile(node)) {
+            if (node.isDeclarationFile) {
                 return node;
             }
-            return ts.visitNode(node, visitor, ts.isSourceFile);
+            currentSourceFile = node;
+            var visited = saveStateAndInvoke(node, visitSourceFile);
+            ts.addEmitHelpers(visited, context.readEmitHelpers());
+            currentSourceFile = undefined;
+            return visited;
         }
         /**
          * Visits a node, saving and restoring state variables on the stack.
@@ -45348,6 +54400,29 @@ var ts;
             currentScope = savedCurrentScope;
             return visited;
         }
+        /**
+         * Performs actions that should always occur immediately before visiting a node.
+         *
+         * @param node The node to visit.
+         */
+        function onBeforeVisitNode(node) {
+            switch (node.kind) {
+                case 265 /* SourceFile */:
+                case 235 /* CaseBlock */:
+                case 234 /* ModuleBlock */:
+                case 207 /* Block */:
+                    currentScope = node;
+                    currentScopeFirstDeclarationsOfName = undefined;
+                    break;
+                case 229 /* ClassDeclaration */:
+                case 228 /* FunctionDeclaration */:
+                    if (ts.hasModifier(node, 2 /* Ambient */)) {
+                        break;
+                    }
+                    recordEmittedDeclarationInScope(node);
+                    break;
+            }
+        }
         /**
          * General-purpose node visitor.
          *
@@ -45362,10 +54437,7 @@ var ts;
          * @param node The node to visit.
          */
         function visitorWorker(node) {
-            if (node.kind === 256 /* SourceFile */) {
-                return visitSourceFile(node);
-            }
-            else if (node.transformFlags & 1 /* TypeScript */) {
+            if (node.transformFlags & 1 /* TypeScript */) {
                 // This node is explicitly marked as TypeScript, so we should transform the node.
                 return visitTypeScript(node);
             }
@@ -45375,6 +54447,33 @@ var ts;
             }
             return node;
         }
+        /**
+         * Specialized visitor that visits the immediate children of a SourceFile.
+         *
+         * @param node The node to visit.
+         */
+        function sourceElementVisitor(node) {
+            return saveStateAndInvoke(node, sourceElementVisitorWorker);
+        }
+        /**
+         * Specialized visitor that visits the immediate children of a SourceFile.
+         *
+         * @param node The node to visit.
+         */
+        function sourceElementVisitorWorker(node) {
+            switch (node.kind) {
+                case 238 /* ImportDeclaration */:
+                    return visitImportDeclaration(node);
+                case 237 /* ImportEqualsDeclaration */:
+                    return visitImportEqualsDeclaration(node);
+                case 243 /* ExportAssignment */:
+                    return visitExportAssignment(node);
+                case 244 /* ExportDeclaration */:
+                    return visitExportDeclaration(node);
+                default:
+                    return visitorWorker(node);
+            }
+        }
         /**
          * Specialized visitor that visits the immediate children of a namespace.
          *
@@ -45389,11 +54488,11 @@ var ts;
          * @param node The node to visit.
          */
         function namespaceElementVisitorWorker(node) {
-            if (node.kind === 236 /* ExportDeclaration */ ||
-                node.kind === 230 /* ImportDeclaration */ ||
-                node.kind === 231 /* ImportClause */ ||
-                (node.kind === 229 /* ImportEqualsDeclaration */ &&
-                    node.moduleReference.kind === 240 /* ExternalModuleReference */)) {
+            if (node.kind === 244 /* ExportDeclaration */ ||
+                node.kind === 238 /* ImportDeclaration */ ||
+                node.kind === 239 /* ImportClause */ ||
+                (node.kind === 237 /* ImportEqualsDeclaration */ &&
+                    node.moduleReference.kind === 248 /* ExternalModuleReference */)) {
                 // do not emit ES6 imports and exports since they are illegal inside a namespace
                 return undefined;
             }
@@ -45423,25 +54522,34 @@ var ts;
          */
         function classElementVisitorWorker(node) {
             switch (node.kind) {
-                case 148 /* Constructor */:
+                case 152 /* Constructor */:
                     // TypeScript constructors are transformed in `visitClassDeclaration`.
                     // We elide them here as `visitorWorker` checks transform flags, which could
                     // erronously include an ES6 constructor without TypeScript syntax.
                     return undefined;
-                case 145 /* PropertyDeclaration */:
-                case 153 /* IndexSignature */:
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                case 147 /* MethodDeclaration */:
+                case 149 /* PropertyDeclaration */:
+                case 157 /* IndexSignature */:
+                case 153 /* GetAccessor */:
+                case 154 /* SetAccessor */:
+                case 151 /* MethodDeclaration */:
                     // Fallback to the default visit behavior.
                     return visitorWorker(node);
-                case 198 /* SemicolonClassElement */:
+                case 206 /* SemicolonClassElement */:
                     return node;
                 default:
                     ts.Debug.failBadSyntaxKind(node);
                     return undefined;
             }
         }
+        function modifierVisitor(node) {
+            if (ts.modifierToFlag(node.kind) & 2270 /* TypeScriptModifier */) {
+                return undefined;
+            }
+            else if (currentNamespace && node.kind === 84 /* ExportKeyword */) {
+                return undefined;
+            }
+            return node;
+        }
         /**
          * Branching visitor, visits a TypeScript syntax node.
          *
@@ -45454,57 +54562,61 @@ var ts;
                 return ts.createNotEmittedStatement(node);
             }
             switch (node.kind) {
-                case 82 /* ExportKeyword */:
-                case 77 /* DefaultKeyword */:
+                case 84 /* ExportKeyword */:
+                case 79 /* DefaultKeyword */:
                     // ES6 export and default modifiers are elided when inside a namespace.
                     return currentNamespace ? undefined : node;
-                case 112 /* PublicKeyword */:
-                case 110 /* PrivateKeyword */:
-                case 111 /* ProtectedKeyword */:
-                case 115 /* AbstractKeyword */:
-                case 118 /* AsyncKeyword */:
-                case 74 /* ConstKeyword */:
-                case 122 /* DeclareKeyword */:
-                case 128 /* ReadonlyKeyword */:
+                case 114 /* PublicKeyword */:
+                case 112 /* PrivateKeyword */:
+                case 113 /* ProtectedKeyword */:
+                case 117 /* AbstractKeyword */:
+                case 76 /* ConstKeyword */:
+                case 124 /* DeclareKeyword */:
+                case 131 /* ReadonlyKeyword */:
                 // TypeScript accessibility and readonly modifiers are elided.
-                case 160 /* ArrayType */:
-                case 161 /* TupleType */:
-                case 159 /* TypeLiteral */:
-                case 154 /* TypePredicate */:
-                case 141 /* TypeParameter */:
-                case 117 /* AnyKeyword */:
-                case 120 /* BooleanKeyword */:
-                case 132 /* StringKeyword */:
-                case 130 /* NumberKeyword */:
-                case 127 /* NeverKeyword */:
-                case 103 /* VoidKeyword */:
-                case 133 /* SymbolKeyword */:
-                case 157 /* ConstructorType */:
-                case 156 /* FunctionType */:
-                case 158 /* TypeQuery */:
-                case 155 /* TypeReference */:
-                case 162 /* UnionType */:
-                case 163 /* IntersectionType */:
-                case 164 /* ParenthesizedType */:
-                case 165 /* ThisType */:
-                case 166 /* LiteralType */:
+                case 164 /* ArrayType */:
+                case 165 /* TupleType */:
+                case 163 /* TypeLiteral */:
+                case 158 /* TypePredicate */:
+                case 145 /* TypeParameter */:
+                case 119 /* AnyKeyword */:
+                case 122 /* BooleanKeyword */:
+                case 136 /* StringKeyword */:
+                case 133 /* NumberKeyword */:
+                case 130 /* NeverKeyword */:
+                case 105 /* VoidKeyword */:
+                case 137 /* SymbolKeyword */:
+                case 161 /* ConstructorType */:
+                case 160 /* FunctionType */:
+                case 162 /* TypeQuery */:
+                case 159 /* TypeReference */:
+                case 166 /* UnionType */:
+                case 167 /* IntersectionType */:
+                case 168 /* ParenthesizedType */:
+                case 169 /* ThisType */:
+                case 170 /* TypeOperator */:
+                case 171 /* IndexedAccessType */:
+                case 172 /* MappedType */:
+                case 173 /* LiteralType */:
                 // TypeScript type nodes are elided.
-                case 153 /* IndexSignature */:
+                case 157 /* IndexSignature */:
                 // TypeScript index signatures are elided.
-                case 143 /* Decorator */:
+                case 147 /* Decorator */:
                 // TypeScript decorators are elided. They will be emitted as part of visitClassDeclaration.
-                case 223 /* TypeAliasDeclaration */:
+                case 231 /* TypeAliasDeclaration */:
                 // TypeScript type-only declarations are elided.
-                case 145 /* PropertyDeclaration */:
+                case 149 /* PropertyDeclaration */:
                 // TypeScript property declarations are elided.
-                case 148 /* Constructor */:
-                    // TypeScript constructors are transformed in `visitClassDeclaration`.
+                case 236 /* NamespaceExportDeclaration */:
+                    // TypeScript namespace export declarations are elided.
                     return undefined;
-                case 222 /* InterfaceDeclaration */:
+                case 152 /* Constructor */:
+                    return visitConstructor(node);
+                case 230 /* InterfaceDeclaration */:
                     // TypeScript interfaces are elided, but some comments may be preserved.
                     // See the implementation of `getLeadingComments` in comments.ts for more details.
                     return ts.createNotEmittedStatement(node);
-                case 221 /* ClassDeclaration */:
+                case 229 /* ClassDeclaration */:
                     // This is a class declaration with TypeScript syntax extensions.
                     //
                     // TypeScript class syntax extensions include:
@@ -45514,9 +54626,8 @@ var ts;
                     // - property declarations
                     // - index signatures
                     // - method overload signatures
-                    // - async methods
                     return visitClassDeclaration(node);
-                case 192 /* ClassExpression */:
+                case 199 /* ClassExpression */:
                     // This is a class expression with TypeScript syntax extensions.
                     //
                     // TypeScript class syntax extensions include:
@@ -45526,37 +54637,36 @@ var ts;
                     // - property declarations
                     // - index signatures
                     // - method overload signatures
-                    // - async methods
                     return visitClassExpression(node);
-                case 251 /* HeritageClause */:
+                case 259 /* HeritageClause */:
                     // This is a heritage clause with TypeScript syntax extensions.
                     //
                     // TypeScript heritage clause extensions include:
                     // - `implements` clause
                     return visitHeritageClause(node);
-                case 194 /* ExpressionWithTypeArguments */:
+                case 201 /* ExpressionWithTypeArguments */:
                     // TypeScript supports type arguments on an expression in an `extends` heritage clause.
                     return visitExpressionWithTypeArguments(node);
-                case 147 /* MethodDeclaration */:
-                    // TypeScript method declarations may be 'async', and may have decorators, modifiers
+                case 151 /* MethodDeclaration */:
+                    // TypeScript method declarations may have decorators, modifiers
                     // or type annotations.
                     return visitMethodDeclaration(node);
-                case 149 /* GetAccessor */:
+                case 153 /* GetAccessor */:
                     // Get Accessors can have TypeScript modifiers, decorators, and type annotations.
                     return visitGetAccessor(node);
-                case 150 /* SetAccessor */:
-                    // Set Accessors can have TypeScript modifiers, decorators, and type annotations.
+                case 154 /* SetAccessor */:
+                    // Set Accessors can have TypeScript modifiers and type annotations.
                     return visitSetAccessor(node);
-                case 220 /* FunctionDeclaration */:
-                    // TypeScript function declarations may be 'async'
+                case 228 /* FunctionDeclaration */:
+                    // Typescript function declarations can have modifiers, decorators, and type annotations.
                     return visitFunctionDeclaration(node);
-                case 179 /* FunctionExpression */:
-                    // TypeScript function expressions may be 'async'
+                case 186 /* FunctionExpression */:
+                    // TypeScript function expressions can have modifiers and type annotations.
                     return visitFunctionExpression(node);
-                case 180 /* ArrowFunction */:
-                    // TypeScript arrow functions may be 'async'
+                case 187 /* ArrowFunction */:
+                    // TypeScript arrow functions can have modifiers and type annotations.
                     return visitArrowFunction(node);
-                case 142 /* Parameter */:
+                case 146 /* Parameter */:
                     // This is a parameter declaration with TypeScript syntax extensions.
                     //
                     // TypeScript parameter declaration syntax extensions include:
@@ -45566,30 +54676,33 @@ var ts;
                     // - type annotations
                     // - this parameters
                     return visitParameter(node);
-                case 178 /* ParenthesizedExpression */:
+                case 185 /* ParenthesizedExpression */:
                     // ParenthesizedExpressions are TypeScript if their expression is a
                     // TypeAssertion or AsExpression
                     return visitParenthesizedExpression(node);
-                case 177 /* TypeAssertionExpression */:
-                case 195 /* AsExpression */:
+                case 184 /* TypeAssertionExpression */:
+                case 202 /* AsExpression */:
                     // TypeScript type assertions are removed, but their subtrees are preserved.
                     return visitAssertionExpression(node);
-                case 196 /* NonNullExpression */:
+                case 181 /* CallExpression */:
+                    return visitCallExpression(node);
+                case 182 /* NewExpression */:
+                    return visitNewExpression(node);
+                case 203 /* NonNullExpression */:
                     // TypeScript non-null expressions are removed, but their subtrees are preserved.
                     return visitNonNullExpression(node);
-                case 224 /* EnumDeclaration */:
+                case 232 /* EnumDeclaration */:
                     // TypeScript enum declarations do not exist in ES6 and must be rewritten.
                     return visitEnumDeclaration(node);
-                case 184 /* AwaitExpression */:
-                    // TypeScript 'await' expressions must be transformed.
-                    return visitAwaitExpression(node);
-                case 200 /* VariableStatement */:
+                case 208 /* VariableStatement */:
                     // TypeScript namespace exports for variable statements must be transformed.
                     return visitVariableStatement(node);
-                case 225 /* ModuleDeclaration */:
+                case 226 /* VariableDeclaration */:
+                    return visitVariableDeclaration(node);
+                case 233 /* ModuleDeclaration */:
                     // TypeScript namespace declarations must be transformed.
                     return visitModuleDeclaration(node);
-                case 229 /* ImportEqualsDeclaration */:
+                case 237 /* ImportEqualsDeclaration */:
                     // TypeScript namespace or external module import.
                     return visitImportEqualsDeclaration(node);
                 default:
@@ -45597,59 +54710,10 @@ var ts;
                     return ts.visitEachChild(node, visitor, context);
             }
         }
-        /**
-         * Performs actions that should always occur immediately before visiting a node.
-         *
-         * @param node The node to visit.
-         */
-        function onBeforeVisitNode(node) {
-            switch (node.kind) {
-                case 256 /* SourceFile */:
-                case 227 /* CaseBlock */:
-                case 226 /* ModuleBlock */:
-                case 199 /* Block */:
-                    currentScope = node;
-                    currentScopeFirstDeclarationsOfName = undefined;
-                    break;
-                case 221 /* ClassDeclaration */:
-                case 220 /* FunctionDeclaration */:
-                    if (ts.hasModifier(node, 2 /* Ambient */)) {
-                        break;
-                    }
-                    recordEmittedDeclarationInScope(node);
-                    break;
-            }
-        }
         function visitSourceFile(node) {
-            currentSourceFile = node;
-            // If the source file requires any helpers and is an external module, and
-            // the importHelpers compiler option is enabled, emit a synthesized import
-            // statement for the helpers library.
-            if (node.flags & 31744 /* EmitHelperFlags */
-                && compilerOptions.importHelpers
-                && (ts.isExternalModule(node) || compilerOptions.isolatedModules)) {
-                startLexicalEnvironment();
-                var statements = [];
-                var statementOffset = ts.addPrologueDirectives(statements, node.statements, /*ensureUseStrict*/ false, visitor);
-                var externalHelpersModuleName = ts.createUniqueName(ts.externalHelpersModuleNameText);
-                var externalHelpersModuleImport = ts.createImportDeclaration(
-                /*decorators*/ undefined, 
-                /*modifiers*/ undefined, ts.createImportClause(/*name*/ undefined, ts.createNamespaceImport(externalHelpersModuleName)), ts.createLiteral(ts.externalHelpersModuleNameText));
-                externalHelpersModuleImport.parent = node;
-                externalHelpersModuleImport.flags &= ~8 /* Synthesized */;
-                statements.push(externalHelpersModuleImport);
-                currentSourceFileExternalHelpersModuleName = externalHelpersModuleName;
-                ts.addRange(statements, ts.visitNodes(node.statements, visitor, ts.isStatement, statementOffset));
-                ts.addRange(statements, endLexicalEnvironment());
-                currentSourceFileExternalHelpersModuleName = undefined;
-                node = ts.updateSourceFileNode(node, ts.createNodeArray(statements, node.statements));
-                node.externalHelpersModuleName = externalHelpersModuleName;
-            }
-            else {
-                node = ts.visitEachChild(node, visitor, context);
-            }
-            ts.setEmitFlags(node, 1 /* EmitEmitHelpers */ | ts.getEmitFlags(node));
-            return node;
+            var alwaysStrict = (compilerOptions.alwaysStrict === undefined ? compilerOptions.strict : compilerOptions.alwaysStrict) &&
+                !(ts.isExternalModule(node) && moduleKind === ts.ModuleKind.ES2015);
+            return ts.updateSourceFileNode(node, ts.visitLexicalEnvironment(node.statements, sourceElementVisitor, context, /*start*/ 0, alwaysStrict));
         }
         /**
          * Tests whether we should emit a __decorate call for a class declaration.
@@ -45670,6 +54734,26 @@ var ts;
         function shouldEmitDecorateCallForParameter(parameter) {
             return parameter.decorators !== undefined && parameter.decorators.length > 0;
         }
+        function getClassFacts(node, staticProperties) {
+            var facts = 0 /* None */;
+            if (ts.some(staticProperties))
+                facts |= 1 /* HasStaticInitializedProperties */;
+            if (ts.getClassExtendsHeritageClauseElement(node))
+                facts |= 64 /* HasExtendsClause */;
+            if (shouldEmitDecorateCallForClass(node))
+                facts |= 2 /* HasConstructorDecorators */;
+            if (ts.childIsDecorated(node))
+                facts |= 4 /* HasMemberDecorators */;
+            if (isExportOfNamespace(node))
+                facts |= 8 /* IsExportOfNamespace */;
+            else if (isDefaultExternalModuleExport(node))
+                facts |= 32 /* IsDefaultExternalExport */;
+            else if (isNamedExternalModuleExport(node))
+                facts |= 16 /* IsNamedExternalExport */;
+            if (languageVersion <= 1 /* ES5 */ && (facts & 7 /* MayNeedImmediatelyInvokedFunctionExpression */))
+                facts |= 128 /* UseImmediatelyInvokedFunctionExpression */;
+            return facts;
+        }
         /**
          * Transforms a class declaration with TypeScript syntax into compatible ES6.
          *
@@ -45683,77 +54767,117 @@ var ts;
          */
         function visitClassDeclaration(node) {
             var staticProperties = getInitializedProperties(node, /*isStatic*/ true);
-            var hasExtendsClause = ts.getClassExtendsHeritageClauseElement(node) !== undefined;
-            var isDecoratedClass = shouldEmitDecorateCallForClass(node);
-            var classAlias;
-            // emit name if
-            // - node has a name
-            // - node has static initializers
-            //
-            var name = node.name;
-            if (!name && staticProperties.length > 0) {
-                name = ts.getGeneratedNameForNode(node);
-            }
-            var statements = [];
-            if (!isDecoratedClass) {
-                //  ${modifiers} class ${name} ${heritageClauses} {
-                //      ${members}
-                //  }
-                var classDeclaration = ts.createClassDeclaration(
-                /*decorators*/ undefined, ts.visitNodes(node.modifiers, visitor, ts.isModifier), name, 
-                /*typeParameters*/ undefined, ts.visitNodes(node.heritageClauses, visitor, ts.isHeritageClause), transformClassMembers(node, hasExtendsClause), 
-                /*location*/ node);
-                ts.setOriginalNode(classDeclaration, node);
-                // To better align with the old emitter, we should not emit a trailing source map
-                // entry if the class has static properties.
-                if (staticProperties.length > 0) {
-                    ts.setEmitFlags(classDeclaration, 1024 /* NoTrailingSourceMap */ | ts.getEmitFlags(classDeclaration));
-                }
-                statements.push(classDeclaration);
-            }
-            else {
-                classAlias = addClassDeclarationHeadWithDecorators(statements, node, name, hasExtendsClause);
+            var facts = getClassFacts(node, staticProperties);
+            if (facts & 128 /* UseImmediatelyInvokedFunctionExpression */) {
+                context.startLexicalEnvironment();
             }
+            var name = node.name || (facts & 5 /* NeedsName */ ? ts.getGeneratedNameForNode(node) : undefined);
+            var classStatement = facts & 2 /* HasConstructorDecorators */
+                ? createClassDeclarationHeadWithDecorators(node, name, facts)
+                : createClassDeclarationHeadWithoutDecorators(node, name, facts);
+            var statements = [classStatement];
             // Emit static property assignment. Because classDeclaration is lexically evaluated,
             // it is safe to emit static property assignment after classDeclaration
             // From ES6 specification:
             //      HasLexicalDeclaration (N) : Determines if the argument identifier has a binding in this environment record that was created using
             //                                  a lexical declaration such as a LexicalDeclaration or a ClassDeclaration.
-            if (staticProperties.length) {
-                addInitializedPropertyStatements(statements, node, staticProperties, getLocalName(node, /*noSourceMaps*/ true));
+            if (facts & 1 /* HasStaticInitializedProperties */) {
+                addInitializedPropertyStatements(statements, staticProperties, facts & 128 /* UseImmediatelyInvokedFunctionExpression */ ? ts.getInternalName(node) : ts.getLocalName(node));
             }
             // Write any decorators of the node.
             addClassElementDecorationStatements(statements, node, /*isStatic*/ false);
             addClassElementDecorationStatements(statements, node, /*isStatic*/ true);
-            addConstructorDecorationStatement(statements, node, classAlias);
+            addConstructorDecorationStatement(statements, node);
+            if (facts & 128 /* UseImmediatelyInvokedFunctionExpression */) {
+                // When we emit a TypeScript class down to ES5, we must wrap it in an IIFE so that the
+                // 'es2015' transformer can properly nest static initializers and decorators. The result
+                // looks something like:
+                //
+                //  var C = function () {
+                //      class C {
+                //      }
+                //      C.static_prop = 1;
+                //      return C;
+                //  }();
+                //
+                var closingBraceLocation = ts.createTokenRange(ts.skipTrivia(currentSourceFile.text, node.members.end), 18 /* CloseBraceToken */);
+                var localName = ts.getInternalName(node);
+                // The following partially-emitted expression exists purely to align our sourcemap
+                // emit with the original emitter.
+                var outer = ts.createPartiallyEmittedExpression(localName);
+                outer.end = closingBraceLocation.end;
+                ts.setEmitFlags(outer, 1536 /* NoComments */);
+                var statement = ts.createReturn(outer);
+                statement.pos = closingBraceLocation.pos;
+                ts.setEmitFlags(statement, 1536 /* NoComments */ | 384 /* NoTokenSourceMaps */);
+                statements.push(statement);
+                ts.addRange(statements, context.endLexicalEnvironment());
+                var varStatement = ts.createVariableStatement(
+                /*modifiers*/ undefined, ts.createVariableDeclarationList([
+                    ts.createVariableDeclaration(ts.getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ false), 
+                    /*type*/ undefined, ts.createImmediatelyInvokedFunctionExpression(statements))
+                ]));
+                ts.setOriginalNode(varStatement, node);
+                ts.setCommentRange(varStatement, node);
+                ts.setSourceMapRange(varStatement, ts.moveRangePastDecorators(node));
+                ts.startOnNewLine(varStatement);
+                statements = [varStatement];
+            }
             // If the class is exported as part of a TypeScript namespace, emit the namespace export.
             // Otherwise, if the class was exported at the top level and was decorated, emit an export
             // declaration or export default for the class.
-            if (isNamespaceExport(node)) {
+            if (facts & 8 /* IsExportOfNamespace */) {
                 addExportMemberAssignment(statements, node);
             }
-            else if (isDecoratedClass) {
-                if (isDefaultExternalModuleExport(node)) {
-                    statements.push(ts.createExportAssignment(
-                    /*decorators*/ undefined, 
-                    /*modifiers*/ undefined, 
-                    /*isExportEquals*/ false, getLocalName(node)));
+            else if (facts & 128 /* UseImmediatelyInvokedFunctionExpression */ || facts & 2 /* HasConstructorDecorators */) {
+                if (facts & 32 /* IsDefaultExternalExport */) {
+                    statements.push(ts.createExportDefault(ts.getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ true)));
                 }
-                else if (isNamedExternalModuleExport(node)) {
-                    statements.push(createExternalModuleExport(name));
+                else if (facts & 16 /* IsNamedExternalExport */) {
+                    statements.push(ts.createExternalModuleExport(ts.getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ true)));
                 }
             }
-            return statements;
+            if (statements.length > 1) {
+                // Add a DeclarationMarker as a marker for the end of the declaration
+                statements.push(ts.createEndOfDeclarationMarker(node));
+                ts.setEmitFlags(classStatement, ts.getEmitFlags(classStatement) | 4194304 /* HasEndOfDeclarationMarker */);
+            }
+            return ts.singleOrMany(statements);
         }
         /**
-         * Transforms a decorated class declaration and appends the resulting statements. If
-         * the class requires an alias to avoid issues with double-binding, the alias is returned.
+         * Transforms a non-decorated class declaration and appends the resulting statements.
          *
          * @param node A ClassDeclaration node.
          * @param name The name of the class.
-         * @param hasExtendsClause A value indicating whether
+         * @param facts Precomputed facts about the class.
          */
-        function addClassDeclarationHeadWithDecorators(statements, node, name, hasExtendsClause) {
+        function createClassDeclarationHeadWithoutDecorators(node, name, facts) {
+            //  ${modifiers} class ${name} ${heritageClauses} {
+            //      ${members}
+            //  }
+            // we do not emit modifiers on the declaration if we are emitting an IIFE
+            var modifiers = !(facts & 128 /* UseImmediatelyInvokedFunctionExpression */)
+                ? ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier)
+                : undefined;
+            var classDeclaration = ts.createClassDeclaration(
+            /*decorators*/ undefined, modifiers, name, 
+            /*typeParameters*/ undefined, ts.visitNodes(node.heritageClauses, visitor, ts.isHeritageClause), transformClassMembers(node, (facts & 64 /* HasExtendsClause */) !== 0));
+            // To better align with the old emitter, we should not emit a trailing source map
+            // entry if the class has static properties.
+            var emitFlags = ts.getEmitFlags(node);
+            if (facts & 1 /* HasStaticInitializedProperties */) {
+                emitFlags |= 32 /* NoTrailingSourceMap */;
+            }
+            ts.setTextRange(classDeclaration, node);
+            ts.setOriginalNode(classDeclaration, node);
+            ts.setEmitFlags(classDeclaration, emitFlags);
+            return classDeclaration;
+        }
+        /**
+         * Transforms a decorated class declaration and appends the resulting statements. If
+         * the class requires an alias to avoid issues with double-binding, the alias is returned.
+         */
+        function createClassDeclarationHeadWithDecorators(node, name, facts) {
             // When we emit an ES6 class that has a class decorator, we must tailor the
             // emit to certain specific cases.
             //
@@ -45788,20 +54912,20 @@ var ts;
             //  ---------------------------------------------------------------------
             //  TypeScript                      | Javascript
             //  ---------------------------------------------------------------------
-            //  @dec                            | let C_1 = class C {
+            //  @dec                            | let C = C_1 = class C {
             //  class C {                       |   static x() { return C_1.y; }
             //    static x() { return C.y; }    | }
-            //    static y = 1;                 | let C = C_1;
-            //  }                               | C.y = 1;
-            //                                  | C = C_1 = __decorate([dec], C);
+            //    static y = 1;                 | C.y = 1;
+            //  }                               | C = C_1 = __decorate([dec], C);
+            //                                  | var C_1;
             //  ---------------------------------------------------------------------
-            //  @dec                            | let C_1 = class C {
+            //  @dec                            | let C = class C {
             //  export class C {                |   static x() { return C_1.y; }
             //    static x() { return C.y; }    | }
-            //    static y = 1;                 | let C = C_1;
-            //  }                               | C.y = 1;
-            //                                  | C = C_1 = __decorate([dec], C);
+            //    static y = 1;                 | C.y = 1;
+            //  }                               | C = C_1 = __decorate([dec], C);
             //                                  | export { C };
+            //                                  | var C_1;
             //  ---------------------------------------------------------------------
             //
             // If a class declaration is the default export of a module, we instead emit
@@ -45830,59 +54954,37 @@ var ts;
             //  ---------------------------------------------------------------------
             //  TypeScript                      | Javascript
             //  ---------------------------------------------------------------------
-            //  @dec                            | let C_1 = class C {
+            //  @dec                            | let C = class C {
             //  export default class C {        |   static x() { return C_1.y; }
             //    static x() { return C.y; }    | }
-            //    static y = 1;                 | let C = C_1;
-            //  }                               | C.y = 1;
-            //                                  | C = C_1 = __decorate([dec], C);
+            //    static y = 1;                 | C.y = 1;
+            //  }                               | C = C_1 = __decorate([dec], C);
             //                                  | export default C;
+            //                                  | var C_1;
             //  ---------------------------------------------------------------------
             //
             var location = ts.moveRangePastDecorators(node);
+            var classAlias = getClassAliasIfNeeded(node);
+            var declName = ts.getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ true);
             //  ... = class ${name} ${heritageClauses} {
             //      ${members}
             //  }
-            var classExpression = ts.setOriginalNode(ts.createClassExpression(
-            /*modifiers*/ undefined, name, 
-            /*typeParameters*/ undefined, ts.visitNodes(node.heritageClauses, visitor, ts.isHeritageClause), transformClassMembers(node, hasExtendsClause), 
-            /*location*/ location), node);
-            if (!name) {
-                name = ts.getGeneratedNameForNode(node);
-            }
-            // Record an alias to avoid class double-binding.
-            var classAlias;
-            if (resolver.getNodeCheckFlags(node) & 8388608 /* ClassWithConstructorReference */) {
-                enableSubstitutionForClassAliases();
-                classAlias = ts.createUniqueName(node.name && !ts.isGeneratedIdentifier(node.name) ? node.name.text : "default");
-                classAliases[ts.getOriginalNodeId(node)] = classAlias;
-            }
-            var declaredName = getDeclarationName(node, /*allowComments*/ true);
+            var heritageClauses = ts.visitNodes(node.heritageClauses, visitor, ts.isHeritageClause);
+            var members = transformClassMembers(node, (facts & 64 /* HasExtendsClause */) !== 0);
+            var classExpression = ts.createClassExpression(/*modifiers*/ undefined, name, /*typeParameters*/ undefined, heritageClauses, members);
+            ts.setOriginalNode(classExpression, node);
+            ts.setTextRange(classExpression, location);
             //  let ${name} = ${classExpression} where name is either declaredName if the class doesn't contain self-reference
             //                                         or decoratedClassAlias if the class contain self-reference.
-            var transformedClassExpression = ts.createVariableStatement(
-            /*modifiers*/ undefined, ts.createLetDeclarationList([
-                ts.createVariableDeclaration(classAlias || declaredName, 
-                /*type*/ undefined, classExpression)
-            ]), 
-            /*location*/ location);
-            ts.setCommentRange(transformedClassExpression, node);
-            statements.push(ts.setOriginalNode(
-            /*node*/ transformedClassExpression, 
-            /*original*/ node));
-            if (classAlias) {
-                // We emit the class alias as a `let` declaration here so that it has the same
-                // TDZ as the class.
-                // let ${declaredName} = ${decoratedClassAlias}
-                statements.push(ts.setOriginalNode(ts.createVariableStatement(
-                /*modifiers*/ undefined, ts.createLetDeclarationList([
-                    ts.createVariableDeclaration(declaredName, 
-                    /*type*/ undefined, classAlias)
-                ]), 
-                /*location*/ location), 
-                /*original*/ node));
-            }
-            return classAlias;
+            var statement = ts.createVariableStatement(
+            /*modifiers*/ undefined, ts.createVariableDeclarationList([
+                ts.createVariableDeclaration(declName, 
+                /*type*/ undefined, classAlias ? ts.createAssignment(classAlias, classExpression) : classExpression)
+            ], 1 /* Let */));
+            ts.setOriginalNode(statement, node);
+            ts.setTextRange(statement, location);
+            ts.setCommentRange(statement, node);
+            return statement;
         }
         /**
          * Transforms a class expression with TypeScript syntax into compatible ES6.
@@ -45896,11 +54998,12 @@ var ts;
         function visitClassExpression(node) {
             var staticProperties = getInitializedProperties(node, /*isStatic*/ true);
             var heritageClauses = ts.visitNodes(node.heritageClauses, visitor, ts.isHeritageClause);
-            var members = transformClassMembers(node, heritageClauses !== undefined);
-            var classExpression = ts.setOriginalNode(ts.createClassExpression(
+            var members = transformClassMembers(node, ts.some(heritageClauses, function (c) { return c.token === 85 /* ExtendsKeyword */; }));
+            var classExpression = ts.createClassExpression(
             /*modifiers*/ undefined, node.name, 
-            /*typeParameters*/ undefined, heritageClauses, members, 
-            /*location*/ node), node);
+            /*typeParameters*/ undefined, heritageClauses, members);
+            ts.setOriginalNode(classExpression, node);
+            ts.setTextRange(classExpression, node);
             if (staticProperties.length > 0) {
                 var expressions = [];
                 var temp = ts.createTempVariable(hoistVariableDeclaration);
@@ -45911,9 +55014,9 @@ var ts;
                 }
                 // To preserve the behavior of the old emitter, we explicitly indent
                 // the body of a class with static initializers.
-                ts.setEmitFlags(classExpression, 524288 /* Indented */ | ts.getEmitFlags(classExpression));
+                ts.setEmitFlags(classExpression, 65536 /* Indented */ | ts.getEmitFlags(classExpression));
                 expressions.push(ts.startOnNewLine(ts.createAssignment(temp, classExpression)));
-                ts.addRange(expressions, generateInitializedPropertyExpressions(node, staticProperties, temp));
+                ts.addRange(expressions, generateInitializedPropertyExpressions(staticProperties, temp));
                 expressions.push(ts.startOnNewLine(temp));
                 return ts.inlineExpressions(expressions);
             }
@@ -45932,7 +55035,7 @@ var ts;
                 members.push(constructor);
             }
             ts.addRange(members, ts.visitNodes(node.members, classElementVisitor, ts.isClassElement));
-            return ts.createNodeArray(members, /*location*/ node.members);
+            return ts.setTextRange(ts.createNodeArray(members), /*location*/ node.members);
         }
         /**
          * Transforms (or creates) a constructor for a class.
@@ -45945,7 +55048,7 @@ var ts;
             // If there is a property assignment, we need to emit constructor whether users define it or not
             // If there is no property assignment, we can omit constructor if users do not define it
             var hasInstancePropertyWithInitializer = ts.forEach(node.members, isInstanceInitializedProperty);
-            var hasParameterPropertyAssignments = node.transformFlags & 131072 /* ContainsParameterPropertyAssignments */;
+            var hasParameterPropertyAssignments = node.transformFlags & 262144 /* ContainsParameterPropertyAssignments */;
             var constructor = ts.getFirstConstructorWithBody(node);
             // If the class does not contain nodes that require a synthesized constructor,
             // accept the current constructor if it exists.
@@ -45953,14 +55056,13 @@ var ts;
                 return ts.visitEachChild(constructor, visitor, context);
             }
             var parameters = transformConstructorParameters(constructor);
-            var body = transformConstructorBody(node, constructor, hasExtendsClause, parameters);
+            var body = transformConstructorBody(node, constructor, hasExtendsClause);
             //  constructor(${parameters}) {
             //      ${body}
             //  }
-            return ts.startOnNewLine(ts.setOriginalNode(ts.createConstructor(
+            return ts.startOnNewLine(ts.setOriginalNode(ts.setTextRange(ts.createConstructor(
             /*decorators*/ undefined, 
-            /*modifiers*/ undefined, parameters, body, 
-            /*location*/ constructor || node), constructor));
+            /*modifiers*/ undefined, parameters, body), constructor || node), constructor));
         }
         /**
          * Transforms (or creates) the parameters for the constructor of a class with
@@ -45985,9 +55087,8 @@ var ts;
             // downlevel the '...args' portion less efficiently by naively copying the contents of 'arguments' to an array.
             // Instead, we'll avoid using a rest parameter and spread into the super call as
             // 'super(...arguments)' instead of 'super(...args)', as you can see in "transformConstructorBody".
-            return constructor
-                ? ts.visitNodes(constructor.parameters, visitor, ts.isParameter)
-                : [];
+            return ts.visitParameterList(constructor && constructor.parameters, visitor, context)
+                || [];
         }
         /**
          * Transforms (or creates) a constructor body for a class with parameter property
@@ -45996,13 +55097,11 @@ var ts;
          * @param node The current class.
          * @param constructor The current class constructor.
          * @param hasExtendsClause A value indicating whether the class has an extends clause.
-         * @param parameters The transformed parameters for the constructor.
          */
-        function transformConstructorBody(node, constructor, hasExtendsClause, parameters) {
+        function transformConstructorBody(node, constructor, hasExtendsClause) {
             var statements = [];
             var indexOfFirstStatement = 0;
-            // The body of a constructor is a new lexical environment
-            startLexicalEnvironment();
+            resumeLexicalEnvironment();
             if (constructor) {
                 indexOfFirstStatement = addPrologueDirectivesAndInitialSuperCall(constructor, statements);
                 // Add parameters with property assignments. Transforms this:
@@ -46039,16 +55138,17 @@ var ts;
             //  }
             //
             var properties = getInitializedProperties(node, /*isStatic*/ false);
-            addInitializedPropertyStatements(statements, node, properties, ts.createThis());
+            addInitializedPropertyStatements(statements, properties, ts.createThis());
             if (constructor) {
                 // The class already had a constructor, so we should add the existing statements, skipping the initial super call.
                 ts.addRange(statements, ts.visitNodes(constructor.body.statements, visitor, ts.isStatement, indexOfFirstStatement));
             }
             // End the lexical environment.
-            ts.addRange(statements, endLexicalEnvironment());
-            return ts.setMultiLine(ts.createBlock(ts.createNodeArray(statements, 
+            statements = ts.mergeLexicalEnvironment(statements, endLexicalEnvironment());
+            return ts.setTextRange(ts.createBlock(ts.setTextRange(ts.createNodeArray(statements), 
             /*location*/ constructor ? constructor.body.statements : node.members), 
-            /*location*/ constructor ? constructor.body : undefined), true);
+            /*multiLine*/ true), 
+            /*location*/ constructor ? constructor.body : undefined);
         }
         /**
          * Adds super call and preceding prologue directives into the list of statements.
@@ -46060,13 +55160,13 @@ var ts;
             if (ctor.body) {
                 var statements = ctor.body.statements;
                 // add prologue directives to the list (if any)
-                var index = ts.addPrologueDirectives(result, statements, /*ensureUseStrict*/ false, visitor);
+                var index = ts.addPrologue(result, statements, /*ensureUseStrict*/ false, visitor);
                 if (index === statements.length) {
                     // list contains nothing but prologue directives (or empty) - exit
                     return index;
                 }
                 var statement = statements[index];
-                if (statement.kind === 202 /* ExpressionStatement */ && ts.isSuperCallExpression(statement.expression)) {
+                if (statement.kind === 210 /* ExpressionStatement */ && ts.isSuperCall(statement.expression)) {
                     result.push(ts.visitNode(statement, visitor, ts.isStatement));
                     return index + 1;
                 }
@@ -46100,12 +55200,10 @@ var ts;
             ts.Debug.assert(ts.isIdentifier(node.name));
             var name = node.name;
             var propertyName = ts.getMutableClone(name);
-            ts.setEmitFlags(propertyName, 49152 /* NoComments */ | 1536 /* NoSourceMap */);
+            ts.setEmitFlags(propertyName, 1536 /* NoComments */ | 48 /* NoSourceMap */);
             var localName = ts.getMutableClone(name);
-            ts.setEmitFlags(localName, 49152 /* NoComments */);
-            return ts.startOnNewLine(ts.createStatement(ts.createAssignment(ts.createPropertyAccess(ts.createThis(), propertyName, 
-            /*location*/ node.name), localName), 
-            /*location*/ ts.moveRangePos(node, -1)));
+            ts.setEmitFlags(localName, 1536 /* NoComments */);
+            return ts.startOnNewLine(ts.setTextRange(ts.createStatement(ts.createAssignment(ts.setTextRange(ts.createPropertyAccess(ts.createThis(), propertyName), node.name), localName)), ts.moveRangePos(node, -1)));
         }
         /**
          * Gets all property declarations with initializers on either the static or instance side of a class.
@@ -46139,21 +55237,20 @@ var ts;
          * @param isStatic A value indicating whether the member should be a static or instance member.
          */
         function isInitializedProperty(member, isStatic) {
-            return member.kind === 145 /* PropertyDeclaration */
+            return member.kind === 149 /* PropertyDeclaration */
                 && isStatic === ts.hasModifier(member, 32 /* Static */)
                 && member.initializer !== undefined;
         }
         /**
          * Generates assignment statements for property initializers.
          *
-         * @param node The class node.
          * @param properties An array of property declarations to transform.
          * @param receiver The receiver on which each property should be assigned.
          */
-        function addInitializedPropertyStatements(statements, node, properties, receiver) {
-            for (var _i = 0, properties_7 = properties; _i < properties_7.length; _i++) {
-                var property = properties_7[_i];
-                var statement = ts.createStatement(transformInitializedProperty(node, property, receiver));
+        function addInitializedPropertyStatements(statements, properties, receiver) {
+            for (var _i = 0, properties_9 = properties; _i < properties_9.length; _i++) {
+                var property = properties_9[_i];
+                var statement = ts.createStatement(transformInitializedProperty(property, receiver));
                 ts.setSourceMapRange(statement, ts.moveRangePastModifiers(property));
                 ts.setCommentRange(statement, property);
                 statements.push(statement);
@@ -46162,15 +55259,14 @@ var ts;
         /**
          * Generates assignment expressions for property initializers.
          *
-         * @param node The class node.
          * @param properties An array of property declarations to transform.
          * @param receiver The receiver on which each property should be assigned.
          */
-        function generateInitializedPropertyExpressions(node, properties, receiver) {
+        function generateInitializedPropertyExpressions(properties, receiver) {
             var expressions = [];
-            for (var _i = 0, properties_8 = properties; _i < properties_8.length; _i++) {
-                var property = properties_8[_i];
-                var expression = transformInitializedProperty(node, property, receiver);
+            for (var _i = 0, properties_10 = properties; _i < properties_10.length; _i++) {
+                var property = properties_10[_i];
+                var expression = transformInitializedProperty(property, receiver);
                 expression.startsOnNewLine = true;
                 ts.setSourceMapRange(expression, ts.moveRangePastModifiers(property));
                 ts.setCommentRange(expression, property);
@@ -46181,11 +55277,10 @@ var ts;
         /**
          * Transforms a property initializer into an assignment statement.
          *
-         * @param node The class containing the property.
          * @param property The property declaration.
          * @param receiver The object receiving the property assignment.
          */
-        function transformInitializedProperty(node, property, receiver) {
+        function transformInitializedProperty(property, receiver) {
             var propertyName = visitPropertyNameOfClassElement(property);
             var initializer = ts.visitNode(property.initializer, visitor, ts.isExpression);
             var memberAccess = ts.createMemberAccessForPropertyName(receiver, propertyName, /*location*/ propertyName);
@@ -46277,12 +55372,12 @@ var ts;
          */
         function getAllDecoratorsOfClassElement(node, member) {
             switch (member.kind) {
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
+                case 153 /* GetAccessor */:
+                case 154 /* SetAccessor */:
                     return getAllDecoratorsOfAccessors(node, member);
-                case 147 /* MethodDeclaration */:
+                case 151 /* MethodDeclaration */:
                     return getAllDecoratorsOfMethod(member);
-                case 145 /* PropertyDeclaration */:
+                case 149 /* PropertyDeclaration */:
                     return getAllDecoratorsOfProperty(member);
                 default:
                     return undefined;
@@ -46299,10 +55394,11 @@ var ts;
                 return undefined;
             }
             var _a = ts.getAllAccessorDeclarations(node.members, accessor), firstAccessor = _a.firstAccessor, secondAccessor = _a.secondAccessor, setAccessor = _a.setAccessor;
-            if (accessor !== firstAccessor) {
+            var firstAccessorWithDecorators = firstAccessor.decorators ? firstAccessor : secondAccessor && secondAccessor.decorators ? secondAccessor : undefined;
+            if (!firstAccessorWithDecorators || accessor !== firstAccessorWithDecorators) {
                 return undefined;
             }
-            var decorators = firstAccessor.decorators || (secondAccessor && secondAccessor.decorators);
+            var decorators = firstAccessorWithDecorators.decorators;
             var parameters = getDecoratorsOfParameters(setAccessor);
             if (!decorators && !parameters) {
                 return undefined;
@@ -46343,14 +55439,14 @@ var ts;
          * @param node The declaration node.
          * @param allDecorators An object containing all of the decorators for the declaration.
          */
-        function transformAllDecoratorsOfDeclaration(node, allDecorators) {
+        function transformAllDecoratorsOfDeclaration(node, container, allDecorators) {
             if (!allDecorators) {
                 return undefined;
             }
             var decoratorExpressions = [];
             ts.addRange(decoratorExpressions, ts.map(allDecorators.decorators, transformDecorator));
             ts.addRange(decoratorExpressions, ts.flatMap(allDecorators.parameters, transformDecoratorsOfParameter));
-            addTypeMetadata(node, decoratorExpressions);
+            addTypeMetadata(node, container, decoratorExpressions);
             return decoratorExpressions;
         }
         /**
@@ -46375,8 +55471,8 @@ var ts;
         function generateClassElementDecorationExpressions(node, isStatic) {
             var members = getDecoratedClassElements(node, isStatic);
             var expressions;
-            for (var _i = 0, members_2 = members; _i < members_2.length; _i++) {
-                var member = members_2[_i];
+            for (var _i = 0, members_3 = members; _i < members_3.length; _i++) {
+                var member = members_3[_i];
                 var expression = generateClassElementDecorationExpression(node, member);
                 if (expression) {
                     if (!expressions) {
@@ -46397,7 +55493,7 @@ var ts;
          */
         function generateClassElementDecorationExpression(node, member) {
             var allDecorators = getAllDecoratorsOfClassElement(node, member);
-            var decoratorExpressions = transformAllDecoratorsOfDeclaration(member, allDecorators);
+            var decoratorExpressions = transformAllDecoratorsOfDeclaration(member, node, allDecorators);
             if (!decoratorExpressions) {
                 return undefined;
             }
@@ -46417,13 +55513,13 @@ var ts;
             //       __metadata("design:type", Function),
             //       __metadata("design:paramtypes", [Object]),
             //       __metadata("design:returntype", void 0)
-            //   ], C.prototype, "method", undefined);
+            //   ], C.prototype, "method", null);
             //
             // The emit for an accessor is:
             //
             //   __decorate([
             //       dec
-            //   ], C.prototype, "accessor", undefined);
+            //   ], C.prototype, "accessor", null);
             //
             // The emit for a property is:
             //
@@ -46434,12 +55530,12 @@ var ts;
             var prefix = getClassMemberPrefix(node, member);
             var memberName = getExpressionForPropertyName(member, /*generateNameForComputedPropertyName*/ true);
             var descriptor = languageVersion > 0 /* ES3 */
-                ? member.kind === 145 /* PropertyDeclaration */
+                ? member.kind === 149 /* PropertyDeclaration */
                     ? ts.createVoidZero()
                     : ts.createNull()
                 : undefined;
-            var helper = ts.createDecorateHelper(currentSourceFileExternalHelpersModuleName, decoratorExpressions, prefix, memberName, descriptor, ts.moveRangePastDecorators(member));
-            ts.setEmitFlags(helper, 49152 /* NoComments */);
+            var helper = createDecorateHelper(context, decoratorExpressions, prefix, memberName, descriptor, ts.moveRangePastDecorators(member));
+            ts.setEmitFlags(helper, 1536 /* NoComments */);
             return helper;
         }
         /**
@@ -46447,8 +55543,8 @@ var ts;
          *
          * @param node The class node.
          */
-        function addConstructorDecorationStatement(statements, node, decoratedClassAlias) {
-            var expression = generateConstructorDecorationExpression(node, decoratedClassAlias);
+        function addConstructorDecorationStatement(statements, node) {
+            var expression = generateConstructorDecorationExpression(node);
             if (expression) {
                 statements.push(ts.setOriginalNode(ts.createStatement(expression), node));
             }
@@ -46458,33 +55554,19 @@ var ts;
          *
          * @param node The class node.
          */
-        function generateConstructorDecorationExpression(node, decoratedClassAlias) {
+        function generateConstructorDecorationExpression(node) {
             var allDecorators = getAllDecoratorsOfConstructor(node);
-            var decoratorExpressions = transformAllDecoratorsOfDeclaration(node, allDecorators);
+            var decoratorExpressions = transformAllDecoratorsOfDeclaration(node, node, allDecorators);
             if (!decoratorExpressions) {
                 return undefined;
             }
-            // Emit the call to __decorate. Given the class:
-            //
-            //   @dec
-            //   class C {
-            //   }
-            //
-            // The emit for the class is:
-            //
-            //   C = C_1 = __decorate([dec], C);
-            //
-            if (decoratedClassAlias) {
-                var expression = ts.createAssignment(decoratedClassAlias, ts.createDecorateHelper(currentSourceFileExternalHelpersModuleName, decoratorExpressions, getDeclarationName(node)));
-                var result = ts.createAssignment(getDeclarationName(node), expression, ts.moveRangePastDecorators(node));
-                ts.setEmitFlags(result, 49152 /* NoComments */);
-                return result;
-            }
-            else {
-                var result = ts.createAssignment(getDeclarationName(node), ts.createDecorateHelper(currentSourceFileExternalHelpersModuleName, decoratorExpressions, getDeclarationName(node)), ts.moveRangePastDecorators(node));
-                ts.setEmitFlags(result, 49152 /* NoComments */);
-                return result;
-            }
+            var classAlias = classAliases && classAliases[ts.getOriginalNodeId(node)];
+            var localName = ts.getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ true);
+            var decorate = createDecorateHelper(context, decoratorExpressions, localName);
+            var expression = ts.createAssignment(localName, classAlias ? ts.createAssignment(classAlias, decorate) : decorate);
+            ts.setEmitFlags(expression, 1536 /* NoComments */);
+            ts.setSourceMapRange(expression, ts.moveRangePastDecorators(node));
+            return expression;
         }
         /**
          * Transforms a decorator into an expression.
@@ -46506,9 +55588,9 @@ var ts;
                 expressions = [];
                 for (var _i = 0, decorators_1 = decorators; _i < decorators_1.length; _i++) {
                     var decorator = decorators_1[_i];
-                    var helper = ts.createParamHelper(currentSourceFileExternalHelpersModuleName, transformDecorator(decorator), parameterOffset, 
+                    var helper = createParamHelper(context, transformDecorator(decorator), parameterOffset, 
                     /*location*/ decorator.expression);
-                    ts.setEmitFlags(helper, 49152 /* NoComments */);
+                    ts.setEmitFlags(helper, 1536 /* NoComments */);
                     expressions.push(helper);
                 }
             }
@@ -46520,41 +55602,41 @@ var ts;
          * @param node The declaration node.
          * @param decoratorExpressions The destination array to which to add new decorator expressions.
          */
-        function addTypeMetadata(node, decoratorExpressions) {
+        function addTypeMetadata(node, container, decoratorExpressions) {
             if (USE_NEW_TYPE_METADATA_FORMAT) {
-                addNewTypeMetadata(node, decoratorExpressions);
+                addNewTypeMetadata(node, container, decoratorExpressions);
             }
             else {
-                addOldTypeMetadata(node, decoratorExpressions);
+                addOldTypeMetadata(node, container, decoratorExpressions);
             }
         }
-        function addOldTypeMetadata(node, decoratorExpressions) {
+        function addOldTypeMetadata(node, container, decoratorExpressions) {
             if (compilerOptions.emitDecoratorMetadata) {
                 if (shouldAddTypeMetadata(node)) {
-                    decoratorExpressions.push(ts.createMetadataHelper(currentSourceFileExternalHelpersModuleName, "design:type", serializeTypeOfNode(node)));
+                    decoratorExpressions.push(createMetadataHelper(context, "design:type", serializeTypeOfNode(node)));
                 }
                 if (shouldAddParamTypesMetadata(node)) {
-                    decoratorExpressions.push(ts.createMetadataHelper(currentSourceFileExternalHelpersModuleName, "design:paramtypes", serializeParameterTypesOfNode(node)));
+                    decoratorExpressions.push(createMetadataHelper(context, "design:paramtypes", serializeParameterTypesOfNode(node, container)));
                 }
                 if (shouldAddReturnTypeMetadata(node)) {
-                    decoratorExpressions.push(ts.createMetadataHelper(currentSourceFileExternalHelpersModuleName, "design:returntype", serializeReturnTypeOfNode(node)));
+                    decoratorExpressions.push(createMetadataHelper(context, "design:returntype", serializeReturnTypeOfNode(node)));
                 }
             }
         }
-        function addNewTypeMetadata(node, decoratorExpressions) {
+        function addNewTypeMetadata(node, container, decoratorExpressions) {
             if (compilerOptions.emitDecoratorMetadata) {
                 var properties = void 0;
                 if (shouldAddTypeMetadata(node)) {
-                    (properties || (properties = [])).push(ts.createPropertyAssignment("type", ts.createArrowFunction(/*modifiers*/ undefined, /*typeParameters*/ undefined, [], /*type*/ undefined, /*equalsGreaterThanToken*/ undefined, serializeTypeOfNode(node))));
+                    (properties || (properties = [])).push(ts.createPropertyAssignment("type", ts.createArrowFunction(/*modifiers*/ undefined, /*typeParameters*/ undefined, [], /*type*/ undefined, ts.createToken(36 /* EqualsGreaterThanToken */), serializeTypeOfNode(node))));
                 }
                 if (shouldAddParamTypesMetadata(node)) {
-                    (properties || (properties = [])).push(ts.createPropertyAssignment("paramTypes", ts.createArrowFunction(/*modifiers*/ undefined, /*typeParameters*/ undefined, [], /*type*/ undefined, /*equalsGreaterThanToken*/ undefined, serializeParameterTypesOfNode(node))));
+                    (properties || (properties = [])).push(ts.createPropertyAssignment("paramTypes", ts.createArrowFunction(/*modifiers*/ undefined, /*typeParameters*/ undefined, [], /*type*/ undefined, ts.createToken(36 /* EqualsGreaterThanToken */), serializeParameterTypesOfNode(node, container))));
                 }
                 if (shouldAddReturnTypeMetadata(node)) {
-                    (properties || (properties = [])).push(ts.createPropertyAssignment("returnType", ts.createArrowFunction(/*modifiers*/ undefined, /*typeParameters*/ undefined, [], /*type*/ undefined, /*equalsGreaterThanToken*/ undefined, serializeReturnTypeOfNode(node))));
+                    (properties || (properties = [])).push(ts.createPropertyAssignment("returnType", ts.createArrowFunction(/*modifiers*/ undefined, /*typeParameters*/ undefined, [], /*type*/ undefined, ts.createToken(36 /* EqualsGreaterThanToken */), serializeReturnTypeOfNode(node))));
                 }
                 if (properties) {
-                    decoratorExpressions.push(ts.createMetadataHelper(currentSourceFileExternalHelpersModuleName, "design:typeinfo", ts.createObjectLiteral(properties, /*location*/ undefined, /*multiLine*/ true)));
+                    decoratorExpressions.push(createMetadataHelper(context, "design:typeinfo", ts.createObjectLiteral(properties, /*multiLine*/ true)));
                 }
             }
         }
@@ -46567,10 +55649,10 @@ var ts;
          */
         function shouldAddTypeMetadata(node) {
             var kind = node.kind;
-            return kind === 147 /* MethodDeclaration */
-                || kind === 149 /* GetAccessor */
-                || kind === 150 /* SetAccessor */
-                || kind === 145 /* PropertyDeclaration */;
+            return kind === 151 /* MethodDeclaration */
+                || kind === 153 /* GetAccessor */
+                || kind === 154 /* SetAccessor */
+                || kind === 149 /* PropertyDeclaration */;
         }
         /**
          * Determines whether to emit the "design:returntype" metadata based on the node's kind.
@@ -46580,7 +55662,7 @@ var ts;
          * @param node The node to test.
          */
         function shouldAddReturnTypeMetadata(node) {
-            return node.kind === 147 /* MethodDeclaration */;
+            return node.kind === 151 /* MethodDeclaration */;
         }
         /**
          * Determines whether to emit the "design:paramtypes" metadata based on the node's kind.
@@ -46590,12 +55672,16 @@ var ts;
          * @param node The node to test.
          */
         function shouldAddParamTypesMetadata(node) {
-            var kind = node.kind;
-            return kind === 221 /* ClassDeclaration */
-                || kind === 192 /* ClassExpression */
-                || kind === 147 /* MethodDeclaration */
-                || kind === 149 /* GetAccessor */
-                || kind === 150 /* SetAccessor */;
+            switch (node.kind) {
+                case 229 /* ClassDeclaration */:
+                case 199 /* ClassExpression */:
+                    return ts.getFirstConstructorWithBody(node) !== undefined;
+                case 151 /* MethodDeclaration */:
+                case 153 /* GetAccessor */:
+                case 154 /* SetAccessor */:
+                    return true;
+            }
+            return false;
         }
         /**
          * Serializes the type of a node for use with decorator type metadata.
@@ -46604,43 +55690,26 @@ var ts;
          */
         function serializeTypeOfNode(node) {
             switch (node.kind) {
-                case 145 /* PropertyDeclaration */:
-                case 142 /* Parameter */:
-                case 149 /* GetAccessor */:
+                case 149 /* PropertyDeclaration */:
+                case 146 /* Parameter */:
+                case 153 /* GetAccessor */:
                     return serializeTypeNode(node.type);
-                case 150 /* SetAccessor */:
+                case 154 /* SetAccessor */:
                     return serializeTypeNode(ts.getSetAccessorTypeAnnotationNode(node));
-                case 221 /* ClassDeclaration */:
-                case 192 /* ClassExpression */:
-                case 147 /* MethodDeclaration */:
+                case 229 /* ClassDeclaration */:
+                case 199 /* ClassExpression */:
+                case 151 /* MethodDeclaration */:
                     return ts.createIdentifier("Function");
                 default:
                     return ts.createVoidZero();
             }
         }
-        /**
-         * Gets the most likely element type for a TypeNode. This is not an exhaustive test
-         * as it assumes a rest argument can only be an array type (either T[], or Array<T>).
-         *
-         * @param node The type node.
-         */
-        function getRestParameterElementType(node) {
-            if (node && node.kind === 160 /* ArrayType */) {
-                return node.elementType;
-            }
-            else if (node && node.kind === 155 /* TypeReference */) {
-                return ts.singleOrUndefined(node.typeArguments);
-            }
-            else {
-                return undefined;
-            }
-        }
         /**
          * Serializes the types of the parameters of a node for use with decorator type metadata.
          *
          * @param node The node that should have its parameter types serialized.
          */
-        function serializeParameterTypesOfNode(node) {
+        function serializeParameterTypesOfNode(node, container) {
             var valueDeclaration = ts.isClassLike(node)
                 ? ts.getFirstConstructorWithBody(node)
                 : ts.isFunctionLike(node) && ts.nodeIsPresent(node.body)
@@ -46648,7 +55717,7 @@ var ts;
                     : undefined;
             var expressions = [];
             if (valueDeclaration) {
-                var parameters = valueDeclaration.parameters;
+                var parameters = getParametersOfDecoratedDeclaration(valueDeclaration, container);
                 var numParameters = parameters.length;
                 for (var i = 0; i < numParameters; i++) {
                     var parameter = parameters[i];
@@ -46656,7 +55725,7 @@ var ts;
                         continue;
                     }
                     if (parameter.dotDotDotToken) {
-                        expressions.push(serializeTypeNode(getRestParameterElementType(parameter.type)));
+                        expressions.push(serializeTypeNode(ts.getRestParameterElementType(parameter.type)));
                     }
                     else {
                         expressions.push(serializeTypeOfNode(parameter));
@@ -46665,6 +55734,15 @@ var ts;
             }
             return ts.createArrayLiteral(expressions);
         }
+        function getParametersOfDecoratedDeclaration(node, container) {
+            if (container && node.kind === 153 /* GetAccessor */) {
+                var setAccessor = ts.getAllAccessorDeclarations(container.members, node).setAccessor;
+                if (setAccessor) {
+                    return setAccessor.parameters;
+                }
+            }
+            return node.parameters;
+        }
         /**
          * Serializes the return type of a node for use with decorator type metadata.
          *
@@ -46674,7 +55752,7 @@ var ts;
             if (ts.isFunctionLike(node) && node.type) {
                 return serializeTypeNode(node.type);
             }
-            else if (ts.isAsyncFunctionLike(node)) {
+            else if (ts.isAsyncFunction(node)) {
                 return ts.createIdentifier("Promise");
             }
             return ts.createVoidZero();
@@ -46702,49 +55780,58 @@ var ts;
                 return ts.createIdentifier("Object");
             }
             switch (node.kind) {
-                case 103 /* VoidKeyword */:
+                case 105 /* VoidKeyword */:
+                case 139 /* UndefinedKeyword */:
+                case 95 /* NullKeyword */:
+                case 130 /* NeverKeyword */:
                     return ts.createVoidZero();
-                case 164 /* ParenthesizedType */:
+                case 168 /* ParenthesizedType */:
                     return serializeTypeNode(node.type);
-                case 156 /* FunctionType */:
-                case 157 /* ConstructorType */:
+                case 160 /* FunctionType */:
+                case 161 /* ConstructorType */:
                     return ts.createIdentifier("Function");
-                case 160 /* ArrayType */:
-                case 161 /* TupleType */:
+                case 164 /* ArrayType */:
+                case 165 /* TupleType */:
                     return ts.createIdentifier("Array");
-                case 154 /* TypePredicate */:
-                case 120 /* BooleanKeyword */:
+                case 158 /* TypePredicate */:
+                case 122 /* BooleanKeyword */:
                     return ts.createIdentifier("Boolean");
-                case 132 /* StringKeyword */:
+                case 136 /* StringKeyword */:
                     return ts.createIdentifier("String");
-                case 166 /* LiteralType */:
+                case 134 /* ObjectKeyword */:
+                    return ts.createIdentifier("Object");
+                case 173 /* LiteralType */:
                     switch (node.literal.kind) {
                         case 9 /* StringLiteral */:
                             return ts.createIdentifier("String");
                         case 8 /* NumericLiteral */:
                             return ts.createIdentifier("Number");
-                        case 99 /* TrueKeyword */:
-                        case 84 /* FalseKeyword */:
+                        case 101 /* TrueKeyword */:
+                        case 86 /* FalseKeyword */:
                             return ts.createIdentifier("Boolean");
                         default:
                             ts.Debug.failBadSyntaxKind(node.literal);
                             break;
                     }
                     break;
-                case 130 /* NumberKeyword */:
+                case 133 /* NumberKeyword */:
                     return ts.createIdentifier("Number");
-                case 133 /* SymbolKeyword */:
-                    return languageVersion < 2 /* ES6 */
+                case 137 /* SymbolKeyword */:
+                    return languageVersion < 2 /* ES2015 */
                         ? getGlobalSymbolNameWithFallback()
                         : ts.createIdentifier("Symbol");
-                case 155 /* TypeReference */:
+                case 159 /* TypeReference */:
                     return serializeTypeReferenceNode(node);
-                case 158 /* TypeQuery */:
-                case 159 /* TypeLiteral */:
-                case 162 /* UnionType */:
-                case 163 /* IntersectionType */:
-                case 117 /* AnyKeyword */:
-                case 165 /* ThisType */:
+                case 167 /* IntersectionType */:
+                case 166 /* UnionType */:
+                    return serializeUnionOrIntersectionType(node);
+                case 162 /* TypeQuery */:
+                case 170 /* TypeOperator */:
+                case 171 /* IndexedAccessType */:
+                case 172 /* MappedType */:
+                case 163 /* TypeLiteral */:
+                case 119 /* AnyKeyword */:
+                case 169 /* ThisType */:
                     break;
                 default:
                     ts.Debug.failBadSyntaxKind(node);
@@ -46752,6 +55839,33 @@ var ts;
             }
             return ts.createIdentifier("Object");
         }
+        function serializeUnionOrIntersectionType(node) {
+            // Note when updating logic here also update getEntityNameForDecoratorMetadata
+            // so that aliases can be marked as referenced
+            var serializedUnion;
+            for (var _i = 0, _a = node.types; _i < _a.length; _i++) {
+                var typeNode = _a[_i];
+                var serializedIndividual = serializeTypeNode(typeNode);
+                if (ts.isIdentifier(serializedIndividual) && serializedIndividual.text === "Object") {
+                    // One of the individual is global object, return immediately
+                    return serializedIndividual;
+                }
+                else if (serializedUnion) {
+                    // Different types
+                    if (!ts.isIdentifier(serializedUnion) ||
+                        !ts.isIdentifier(serializedIndividual) ||
+                        serializedUnion.text !== serializedIndividual.text) {
+                        return ts.createIdentifier("Object");
+                    }
+                }
+                else {
+                    // Initialize the union type
+                    serializedUnion = serializedIndividual;
+                }
+            }
+            // If we were able to find common type, use it
+            return serializedUnion;
+        }
         /**
          * Serializes a TypeReferenceNode to an appropriate JS constructor value for use with
          * decorator type metadata.
@@ -46763,7 +55877,7 @@ var ts;
                 case ts.TypeReferenceSerializationKind.Unknown:
                     var serialized = serializeEntityNameAsExpression(node.typeName, /*useFallback*/ true);
                     var temp = ts.createTempVariable(hoistVariableDeclaration);
-                    return ts.createLogicalOr(ts.createLogicalAnd(ts.createStrictEquality(ts.createTypeOf(ts.createAssignment(temp, serialized)), ts.createLiteral("function")), temp), ts.createIdentifier("Object"));
+                    return ts.createLogicalOr(ts.createLogicalAnd(ts.createTypeCheck(ts.createAssignment(temp, serialized), "function"), temp), ts.createIdentifier("Object"));
                 case ts.TypeReferenceSerializationKind.TypeWithConstructSignatureAndValue:
                     return serializeEntityNameAsExpression(node.typeName, /*useFallback*/ false);
                 case ts.TypeReferenceSerializationKind.VoidNullableOrNeverType:
@@ -46777,7 +55891,7 @@ var ts;
                 case ts.TypeReferenceSerializationKind.ArrayLikeType:
                     return ts.createIdentifier("Array");
                 case ts.TypeReferenceSerializationKind.ESSymbolType:
-                    return languageVersion < 2 /* ES6 */
+                    return languageVersion < 2 /* ES2015 */
                         ? getGlobalSymbolNameWithFallback()
                         : ts.createIdentifier("Symbol");
                 case ts.TypeReferenceSerializationKind.TypeWithCallSignature:
@@ -46798,18 +55912,18 @@ var ts;
          */
         function serializeEntityNameAsExpression(node, useFallback) {
             switch (node.kind) {
-                case 69 /* Identifier */:
+                case 71 /* Identifier */:
                     // Create a clone of the name with a new parent, and treat it as if it were
                     // a source tree node for the purposes of the checker.
-                    var name_30 = ts.getMutableClone(node);
-                    name_30.flags &= ~8 /* Synthesized */;
-                    name_30.original = undefined;
-                    name_30.parent = currentScope;
+                    var name_47 = ts.getMutableClone(node);
+                    name_47.flags &= ~8 /* Synthesized */;
+                    name_47.original = undefined;
+                    name_47.parent = currentScope;
                     if (useFallback) {
-                        return ts.createLogicalAnd(ts.createStrictInequality(ts.createTypeOf(name_30), ts.createLiteral("undefined")), name_30);
+                        return ts.createLogicalAnd(ts.createStrictInequality(ts.createTypeOf(name_47), ts.createLiteral("undefined")), name_47);
                     }
-                    return name_30;
-                case 139 /* QualifiedName */:
+                    return name_47;
+                case 143 /* QualifiedName */:
                     return serializeQualifiedNameAsExpression(node, useFallback);
             }
         }
@@ -46822,7 +55936,7 @@ var ts;
          */
         function serializeQualifiedNameAsExpression(node, useFallback) {
             var left;
-            if (node.left.kind === 69 /* Identifier */) {
+            if (node.left.kind === 71 /* Identifier */) {
                 left = serializeEntityNameAsExpression(node.left, useFallback);
             }
             else if (useFallback) {
@@ -46839,7 +55953,7 @@ var ts;
          * available.
          */
         function getGlobalSymbolNameWithFallback() {
-            return ts.createConditional(ts.createStrictEquality(ts.createTypeOf(ts.createIdentifier("Symbol")), ts.createLiteral("function")), ts.createToken(53 /* QuestionToken */), ts.createIdentifier("Symbol"), ts.createToken(54 /* ColonToken */), ts.createIdentifier("Object"));
+            return ts.createConditional(ts.createTypeCheck(ts.createIdentifier("Symbol"), "function"), ts.createIdentifier("Symbol"), ts.createIdentifier("Object"));
         }
         /**
          * Gets an expression that represents a property name. For a computed property, a
@@ -46855,7 +55969,7 @@ var ts;
                     : name.expression;
             }
             else if (ts.isIdentifier(name)) {
-                return ts.createLiteral(name.text);
+                return ts.createLiteral(ts.unescapeIdentifier(name.text));
             }
             else {
                 return ts.getSynthesizedClone(name);
@@ -46877,7 +55991,7 @@ var ts;
                     hoistVariableDeclaration(generatedName);
                     expression = ts.createAssignment(generatedName, expression);
                 }
-                return ts.setOriginalNode(ts.createComputedPropertyName(expression, /*location*/ name), name);
+                return ts.updateComputedPropertyName(name, expression);
             }
             else {
                 return name;
@@ -46893,9 +56007,9 @@ var ts;
          * @param node The HeritageClause to transform.
          */
         function visitHeritageClause(node) {
-            if (node.token === 83 /* ExtendsKeyword */) {
+            if (node.token === 85 /* ExtendsKeyword */) {
                 var types = ts.visitNodes(node.types, visitor, ts.isExpressionWithTypeArguments, 0, 1);
-                return ts.createHeritageClause(83 /* ExtendsKeyword */, types, node);
+                return ts.setTextRange(ts.createHeritageClause(85 /* ExtendsKeyword */, types), node);
             }
             return undefined;
         }
@@ -46908,9 +56022,8 @@ var ts;
          * @param node The ExpressionWithTypeArguments to transform.
          */
         function visitExpressionWithTypeArguments(node) {
-            var expression = ts.visitNode(node.expression, visitor, ts.isLeftHandSideExpression);
-            return ts.createExpressionWithTypeArguments(
-            /*typeArguments*/ undefined, expression, node);
+            return ts.updateExpressionWithTypeArguments(node, 
+            /*typeArguments*/ undefined, ts.visitNode(node.expression, visitor, ts.isLeftHandSideExpression));
         }
         /**
          * Determines whether to emit a function-like declaration. We should not emit the
@@ -46921,12 +56034,18 @@ var ts;
         function shouldEmitFunctionLikeDeclaration(node) {
             return !ts.nodeIsMissing(node.body);
         }
+        function visitConstructor(node) {
+            if (!shouldEmitFunctionLikeDeclaration(node)) {
+                return undefined;
+            }
+            return ts.updateConstructor(node, ts.visitNodes(node.decorators, visitor, ts.isDecorator), ts.visitNodes(node.modifiers, visitor, ts.isModifier), ts.visitParameterList(node.parameters, visitor, context), ts.visitFunctionBody(node.body, visitor, context));
+        }
         /**
          * Visits a method declaration of a class.
          *
          * This function will be called when one of the following conditions are met:
          * - The node is an overload
-         * - The node is marked as abstract, async, public, private, protected, or readonly
+         * - The node is marked as abstract, public, private, protected, or readonly
          * - The node has both a decorator and a computed property name
          *
          * @param node The method node.
@@ -46935,17 +56054,18 @@ var ts;
             if (!shouldEmitFunctionLikeDeclaration(node)) {
                 return undefined;
             }
-            var method = ts.createMethod(
-            /*decorators*/ undefined, ts.visitNodes(node.modifiers, visitor, ts.isModifier), node.asteriskToken, visitPropertyNameOfClassElement(node), 
-            /*typeParameters*/ undefined, ts.visitNodes(node.parameters, visitor, ts.isParameter), 
-            /*type*/ undefined, transformFunctionBody(node), 
-            /*location*/ node);
-            // While we emit the source map for the node after skipping decorators and modifiers,
-            // we need to emit the comments for the original range.
-            ts.setCommentRange(method, node);
-            ts.setSourceMapRange(method, ts.moveRangePastDecorators(node));
-            ts.setOriginalNode(method, node);
-            return method;
+            var updated = ts.updateMethod(node, 
+            /*decorators*/ undefined, ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), node.asteriskToken, visitPropertyNameOfClassElement(node), 
+            /*questionToken*/ undefined, 
+            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
+            /*type*/ undefined, ts.visitFunctionBody(node.body, visitor, context));
+            if (updated !== node) {
+                // While we emit the source map for the node after skipping decorators and modifiers,
+                // we need to emit the comments for the original range.
+                ts.setCommentRange(updated, node);
+                ts.setSourceMapRange(updated, ts.moveRangePastDecorators(node));
+            }
+            return updated;
         }
         /**
          * Determines whether to emit an accessor declaration. We should not emit the
@@ -46969,16 +56089,16 @@ var ts;
             if (!shouldEmitAccessorDeclaration(node)) {
                 return undefined;
             }
-            var accessor = ts.createGetAccessor(
-            /*decorators*/ undefined, ts.visitNodes(node.modifiers, visitor, ts.isModifier), visitPropertyNameOfClassElement(node), ts.visitNodes(node.parameters, visitor, ts.isParameter), 
-            /*type*/ undefined, node.body ? ts.visitEachChild(node.body, visitor, context) : ts.createBlock([]), 
-            /*location*/ node);
-            // While we emit the source map for the node after skipping decorators and modifiers,
-            // we need to emit the comments for the original range.
-            ts.setCommentRange(accessor, node);
-            ts.setSourceMapRange(accessor, ts.moveRangePastDecorators(node));
-            ts.setOriginalNode(accessor, node);
-            return accessor;
+            var updated = ts.updateGetAccessor(node, 
+            /*decorators*/ undefined, ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), visitPropertyNameOfClassElement(node), ts.visitParameterList(node.parameters, visitor, context), 
+            /*type*/ undefined, ts.visitFunctionBody(node.body, visitor, context) || ts.createBlock([]));
+            if (updated !== node) {
+                // While we emit the source map for the node after skipping decorators and modifiers,
+                // we need to emit the comments for the original range.
+                ts.setCommentRange(updated, node);
+                ts.setSourceMapRange(updated, ts.moveRangePastDecorators(node));
+            }
+            return updated;
         }
         /**
          * Visits a set accessor declaration of a class.
@@ -46993,23 +56113,23 @@ var ts;
             if (!shouldEmitAccessorDeclaration(node)) {
                 return undefined;
             }
-            var accessor = ts.createSetAccessor(
-            /*decorators*/ undefined, ts.visitNodes(node.modifiers, visitor, ts.isModifier), visitPropertyNameOfClassElement(node), ts.visitNodes(node.parameters, visitor, ts.isParameter), node.body ? ts.visitEachChild(node.body, visitor, context) : ts.createBlock([]), 
-            /*location*/ node);
-            // While we emit the source map for the node after skipping decorators and modifiers,
-            // we need to emit the comments for the original range.
-            ts.setCommentRange(accessor, node);
-            ts.setSourceMapRange(accessor, ts.moveRangePastDecorators(node));
-            ts.setOriginalNode(accessor, node);
-            return accessor;
+            var updated = ts.updateSetAccessor(node, 
+            /*decorators*/ undefined, ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), visitPropertyNameOfClassElement(node), ts.visitParameterList(node.parameters, visitor, context), ts.visitFunctionBody(node.body, visitor, context) || ts.createBlock([]));
+            if (updated !== node) {
+                // While we emit the source map for the node after skipping decorators and modifiers,
+                // we need to emit the comments for the original range.
+                ts.setCommentRange(updated, node);
+                ts.setSourceMapRange(updated, ts.moveRangePastDecorators(node));
+            }
+            return updated;
         }
         /**
          * Visits a function declaration.
          *
          * This function will be called when one of the following conditions are met:
          * - The node is an overload
-         * - The node is marked async
          * - The node is exported from a TypeScript namespace
+         * - The node has decorators
          *
          * @param node The function node.
          */
@@ -47017,136 +56137,44 @@ var ts;
             if (!shouldEmitFunctionLikeDeclaration(node)) {
                 return ts.createNotEmittedStatement(node);
             }
-            var func = ts.createFunctionDeclaration(
-            /*decorators*/ undefined, ts.visitNodes(node.modifiers, visitor, ts.isModifier), node.asteriskToken, node.name, 
-            /*typeParameters*/ undefined, ts.visitNodes(node.parameters, visitor, ts.isParameter), 
-            /*type*/ undefined, transformFunctionBody(node), 
-            /*location*/ node);
-            ts.setOriginalNode(func, node);
-            if (isNamespaceExport(node)) {
-                var statements = [func];
+            var updated = ts.updateFunctionDeclaration(node, 
+            /*decorators*/ undefined, ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), node.asteriskToken, node.name, 
+            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
+            /*type*/ undefined, ts.visitFunctionBody(node.body, visitor, context) || ts.createBlock([]));
+            if (isExportOfNamespace(node)) {
+                var statements = [updated];
                 addExportMemberAssignment(statements, node);
                 return statements;
             }
-            return func;
+            return updated;
         }
         /**
          * Visits a function expression node.
          *
          * This function will be called when one of the following conditions are met:
-         * - The node is marked async
+         * - The node has type annotations
          *
          * @param node The function expression node.
          */
         function visitFunctionExpression(node) {
-            if (ts.nodeIsMissing(node.body)) {
+            if (!shouldEmitFunctionLikeDeclaration(node)) {
                 return ts.createOmittedExpression();
             }
-            var func = ts.createFunctionExpression(node.asteriskToken, node.name, 
-            /*typeParameters*/ undefined, ts.visitNodes(node.parameters, visitor, ts.isParameter), 
-            /*type*/ undefined, transformFunctionBody(node), 
-            /*location*/ node);
-            ts.setOriginalNode(func, node);
-            return func;
+            var updated = ts.updateFunctionExpression(node, ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), node.asteriskToken, node.name, 
+            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
+            /*type*/ undefined, ts.visitFunctionBody(node.body, visitor, context) || ts.createBlock([]));
+            return updated;
         }
         /**
          * @remarks
          * This function will be called when one of the following conditions are met:
-         * - The node is marked async
+         * - The node has type annotations
          */
         function visitArrowFunction(node) {
-            var func = ts.createArrowFunction(
-            /*modifiers*/ undefined, 
-            /*typeParameters*/ undefined, ts.visitNodes(node.parameters, visitor, ts.isParameter), 
-            /*type*/ undefined, node.equalsGreaterThanToken, transformConciseBody(node), 
-            /*location*/ node);
-            ts.setOriginalNode(func, node);
-            return func;
-        }
-        function transformFunctionBody(node) {
-            if (ts.isAsyncFunctionLike(node)) {
-                return transformAsyncFunctionBody(node);
-            }
-            return transformFunctionBodyWorker(node.body);
-        }
-        function transformFunctionBodyWorker(body, start) {
-            if (start === void 0) { start = 0; }
-            var savedCurrentScope = currentScope;
-            currentScope = body;
-            startLexicalEnvironment();
-            var statements = ts.visitNodes(body.statements, visitor, ts.isStatement, start);
-            var visited = ts.updateBlock(body, statements);
-            var declarations = endLexicalEnvironment();
-            currentScope = savedCurrentScope;
-            return ts.mergeFunctionBodyLexicalEnvironment(visited, declarations);
-        }
-        function transformConciseBody(node) {
-            if (ts.isAsyncFunctionLike(node)) {
-                return transformAsyncFunctionBody(node);
-            }
-            return transformConciseBodyWorker(node.body, /*forceBlockFunctionBody*/ false);
-        }
-        function transformConciseBodyWorker(body, forceBlockFunctionBody) {
-            if (ts.isBlock(body)) {
-                return transformFunctionBodyWorker(body);
-            }
-            else {
-                startLexicalEnvironment();
-                var visited = ts.visitNode(body, visitor, ts.isConciseBody);
-                var declarations = endLexicalEnvironment();
-                var merged = ts.mergeFunctionBodyLexicalEnvironment(visited, declarations);
-                if (forceBlockFunctionBody && !ts.isBlock(merged)) {
-                    return ts.createBlock([
-                        ts.createReturn(merged)
-                    ]);
-                }
-                else {
-                    return merged;
-                }
-            }
-        }
-        function getPromiseConstructor(type) {
-            var typeName = ts.getEntityNameFromTypeNode(type);
-            if (typeName && ts.isEntityName(typeName)) {
-                var serializationKind = resolver.getTypeReferenceSerializationKind(typeName);
-                if (serializationKind === ts.TypeReferenceSerializationKind.TypeWithConstructSignatureAndValue
-                    || serializationKind === ts.TypeReferenceSerializationKind.Unknown) {
-                    return typeName;
-                }
-            }
-            return undefined;
-        }
-        function transformAsyncFunctionBody(node) {
-            var promiseConstructor = languageVersion < 2 /* ES6 */ ? getPromiseConstructor(node.type) : undefined;
-            var isArrowFunction = node.kind === 180 /* ArrowFunction */;
-            var hasLexicalArguments = (resolver.getNodeCheckFlags(node) & 8192 /* CaptureArguments */) !== 0;
-            // An async function is emit as an outer function that calls an inner
-            // generator function. To preserve lexical bindings, we pass the current
-            // `this` and `arguments` objects to `__awaiter`. The generator function
-            // passed to `__awaiter` is executed inside of the callback to the
-            // promise constructor.
-            if (!isArrowFunction) {
-                var statements = [];
-                var statementOffset = ts.addPrologueDirectives(statements, node.body.statements, /*ensureUseStrict*/ false, visitor);
-                statements.push(ts.createReturn(ts.createAwaiterHelper(currentSourceFileExternalHelpersModuleName, hasLexicalArguments, promiseConstructor, transformFunctionBodyWorker(node.body, statementOffset))));
-                var block = ts.createBlock(statements, /*location*/ node.body, /*multiLine*/ true);
-                // Minor optimization, emit `_super` helper to capture `super` access in an arrow.
-                // This step isn't needed if we eventually transform this to ES5.
-                if (languageVersion >= 2 /* ES6 */) {
-                    if (resolver.getNodeCheckFlags(node) & 4096 /* AsyncMethodWithSuperBinding */) {
-                        enableSubstitutionForAsyncMethodsWithSuper();
-                        ts.setEmitFlags(block, 8 /* EmitAdvancedSuperHelper */);
-                    }
-                    else if (resolver.getNodeCheckFlags(node) & 2048 /* AsyncMethodWithSuper */) {
-                        enableSubstitutionForAsyncMethodsWithSuper();
-                        ts.setEmitFlags(block, 4 /* EmitSuperHelper */);
-                    }
-                }
-                return block;
-            }
-            else {
-                return ts.createAwaiterHelper(currentSourceFileExternalHelpersModuleName, hasLexicalArguments, promiseConstructor, transformConciseBodyWorker(node.body, /*forceBlockFunctionBody*/ true));
-            }
+            var updated = ts.updateArrowFunction(node, ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), 
+            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
+            /*type*/ undefined, ts.visitFunctionBody(node.body, visitor, context));
+            return updated;
         }
         /**
          * Visits a parameter declaration node.
@@ -47159,21 +56187,21 @@ var ts;
          * @param node The parameter declaration node.
          */
         function visitParameter(node) {
-            if (node.name && ts.isIdentifier(node.name) && node.name.originalKeywordKind === 97 /* ThisKeyword */) {
+            if (ts.parameterIsThisKeyword(node)) {
                 return undefined;
             }
-            var parameter = ts.createParameterDeclaration(
+            var parameter = ts.createParameter(
             /*decorators*/ undefined, 
             /*modifiers*/ undefined, node.dotDotDotToken, ts.visitNode(node.name, visitor, ts.isBindingName), 
             /*questionToken*/ undefined, 
-            /*type*/ undefined, ts.visitNode(node.initializer, visitor, ts.isExpression), 
-            /*location*/ ts.moveRangePastModifiers(node));
+            /*type*/ undefined, ts.visitNode(node.initializer, visitor, ts.isExpression));
             // While we emit the source map for the node after skipping decorators and modifiers,
             // we need to emit the comments for the original range.
             ts.setOriginalNode(parameter, node);
+            ts.setTextRange(parameter, ts.moveRangePastModifiers(node));
             ts.setCommentRange(parameter, node);
             ts.setSourceMapRange(parameter, ts.moveRangePastModifiers(node));
-            ts.setEmitFlags(parameter.name, 1024 /* NoTrailingSourceMap */);
+            ts.setEmitFlags(parameter.name, 32 /* NoTrailingSourceMap */);
             return parameter;
         }
         /**
@@ -47183,14 +56211,13 @@ var ts;
          * - The node is exported from a TypeScript namespace.
          */
         function visitVariableStatement(node) {
-            if (isNamespaceExport(node)) {
+            if (isExportOfNamespace(node)) {
                 var variables = ts.getInitializedVariables(node.declarationList);
                 if (variables.length === 0) {
                     // elide statement if there are no initialized variables.
                     return undefined;
                 }
-                return ts.createStatement(ts.inlineExpressions(ts.map(variables, transformInitializedVariable)), 
-                /*location*/ node);
+                return ts.setTextRange(ts.createStatement(ts.inlineExpressions(ts.map(variables, transformInitializedVariable))), node);
             }
             else {
                 return ts.visitEachChild(node, visitor, context);
@@ -47199,24 +56226,17 @@ var ts;
         function transformInitializedVariable(node) {
             var name = node.name;
             if (ts.isBindingPattern(name)) {
-                return ts.flattenVariableDestructuringToExpression(context, node, hoistVariableDeclaration, getNamespaceMemberNameWithSourceMapsAndWithoutComments, visitor);
+                return ts.flattenDestructuringAssignment(node, visitor, context, 0 /* All */, 
+                /*needsValue*/ false, createNamespaceExportExpression);
             }
             else {
-                return ts.createAssignment(getNamespaceMemberNameWithSourceMapsAndWithoutComments(name), ts.visitNode(node.initializer, visitor, ts.isExpression), 
+                return ts.setTextRange(ts.createAssignment(getNamespaceMemberNameWithSourceMapsAndWithoutComments(name), ts.visitNode(node.initializer, visitor, ts.isExpression)), 
                 /*location*/ node);
             }
         }
-        /**
-         * Visits an await expression.
-         *
-         * This function will be called any time a TypeScript await expression is encountered.
-         *
-         * @param node The await expression node.
-         */
-        function visitAwaitExpression(node) {
-            return ts.setOriginalNode(ts.createYield(
-            /*asteriskToken*/ undefined, ts.visitNode(node.expression, visitor, ts.isExpression), 
-            /*location*/ node), node);
+        function visitVariableDeclaration(node) {
+            return ts.updateVariableDeclaration(node, ts.visitNode(node.name, visitor, ts.isBindingName), 
+            /*type*/ undefined, ts.visitNode(node.initializer, visitor, ts.isExpression));
         }
         /**
          * Visits a parenthesized expression that contains either a type assertion or an `as`
@@ -47236,13 +56256,13 @@ var ts;
                 // code if the casted expression has a lower precedence than the rest of the
                 // expression.
                 //
+                // To preserve comments, we return a "PartiallyEmittedExpression" here which will
+                // preserve the position information of the original expression.
+                //
                 // Due to the auto-parenthesization rules used by the visitor and factory functions
                 // we can safely elide the parentheses here, as a new synthetic
                 // ParenthesizedExpression will be inserted if we remove parentheses too
                 // aggressively.
-                //
-                // To preserve comments, we return a "PartiallyEmittedExpression" here which will
-                // preserve the position information of the original expression.
                 return ts.createPartiallyEmittedExpression(expression, node);
             }
             return ts.visitEachChild(node, visitor, context);
@@ -47255,6 +56275,14 @@ var ts;
             var expression = ts.visitNode(node.expression, visitor, ts.isLeftHandSideExpression);
             return ts.createPartiallyEmittedExpression(expression, node);
         }
+        function visitCallExpression(node) {
+            return ts.updateCall(node, ts.visitNode(node.expression, visitor, ts.isExpression), 
+            /*typeArguments*/ undefined, ts.visitNodes(node.arguments, visitor, ts.isExpression));
+        }
+        function visitNewExpression(node) {
+            return ts.updateNew(node, ts.visitNode(node.expression, visitor, ts.isExpression), 
+            /*typeArguments*/ undefined, ts.visitNodes(node.arguments, visitor, ts.isExpression));
+        }
         /**
          * Determines whether to emit an enum declaration.
          *
@@ -47265,21 +56293,6 @@ var ts;
                 || compilerOptions.preserveConstEnums
                 || compilerOptions.isolatedModules;
         }
-        function shouldEmitVarForEnumDeclaration(node) {
-            return isFirstEmittedDeclarationInScope(node)
-                && (!ts.hasModifier(node, 1 /* Export */)
-                    || isES6ExportedDeclaration(node));
-        }
-        /*
-         * Adds a trailing VariableStatement for an enum or module declaration.
-         */
-        function addVarForEnumExportedFromNamespace(statements, node) {
-            var statement = ts.createVariableStatement(
-            /*modifiers*/ undefined, [ts.createVariableDeclaration(getDeclarationName(node), 
-                /*type*/ undefined, getExportName(node))]);
-            ts.setSourceMapRange(statement, node);
-            statements.push(statement);
-        }
         /**
          * Visits an enum declaration.
          *
@@ -47294,16 +56307,14 @@ var ts;
             var statements = [];
             // We request to be advised when the printer is about to print this node. This allows
             // us to set up the correct state for later substitutions.
-            var emitFlags = 64 /* AdviseOnEmitNode */;
+            var emitFlags = 2 /* AdviseOnEmitNode */;
             // If needed, we should emit a variable declaration for the enum. If we emit
             // a leading variable declaration, we should not emit leading comments for the
             // enum body.
-            recordEmittedDeclarationInScope(node);
-            if (shouldEmitVarForEnumDeclaration(node)) {
-                addVarForEnumOrModuleDeclaration(statements, node);
+            if (addVarForEnumOrModuleDeclaration(statements, node)) {
                 // We should still emit the comments if we are emitting a system module.
                 if (moduleKind !== ts.ModuleKind.System || currentScope !== currentSourceFile) {
-                    emitFlags |= 16384 /* NoLeadingComments */;
+                    emitFlags |= 512 /* NoLeadingComments */;
                 }
             }
             // `parameterName` is the declaration name used inside of the enum.
@@ -47311,24 +56322,36 @@ var ts;
             // `containerName` is the expression used inside of the enum for assignments.
             var containerName = getNamespaceContainerName(node);
             // `exportName` is the expression used within this node's container for any exported references.
-            var exportName = getExportName(node);
+            var exportName = ts.hasModifier(node, 1 /* Export */)
+                ? ts.getExternalModuleOrNamespaceExportName(currentNamespaceContainerName, node, /*allowComments*/ false, /*allowSourceMaps*/ true)
+                : ts.getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ true);
+            //  x || (x = {})
+            //  exports.x || (exports.x = {})
+            var moduleArg = ts.createLogicalOr(exportName, ts.createAssignment(exportName, ts.createObjectLiteral()));
+            if (hasNamespaceQualifiedExportName(node)) {
+                // `localName` is the expression used within this node's containing scope for any local references.
+                var localName = ts.getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ true);
+                //  x = (exports.x || (exports.x = {}))
+                moduleArg = ts.createAssignment(localName, moduleArg);
+            }
             //  (function (x) {
             //      x[x["y"] = 0] = "y";
             //      ...
             //  })(x || (x = {}));
             var enumStatement = ts.createStatement(ts.createCall(ts.createFunctionExpression(
+            /*modifiers*/ undefined, 
             /*asteriskToken*/ undefined, 
             /*name*/ undefined, 
-            /*typeParameters*/ undefined, [ts.createParameter(parameterName)], 
+            /*typeParameters*/ undefined, [ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, parameterName)], 
             /*type*/ undefined, transformEnumBody(node, containerName)), 
-            /*typeArguments*/ undefined, [ts.createLogicalOr(exportName, ts.createAssignment(exportName, ts.createObjectLiteral()))]), 
-            /*location*/ node);
+            /*typeArguments*/ undefined, [moduleArg]));
             ts.setOriginalNode(enumStatement, node);
+            ts.setTextRange(enumStatement, node);
             ts.setEmitFlags(enumStatement, emitFlags);
             statements.push(enumStatement);
-            if (isNamespaceExport(node)) {
-                addVarForEnumExportedFromNamespace(statements, node);
-            }
+            // Add a DeclarationMarker for the enum to preserve trailing comments and mark
+            // the end of the declaration.
+            statements.push(ts.createEndOfDeclarationMarker(node));
             return statements;
         }
         /**
@@ -47344,8 +56367,7 @@ var ts;
             ts.addRange(statements, ts.map(node.members, transformEnumMember));
             ts.addRange(statements, endLexicalEnvironment());
             currentNamespaceContainerName = savedCurrentNamespaceLocalName;
-            return ts.createBlock(ts.createNodeArray(statements, /*location*/ node.members), 
-            /*location*/ undefined, 
+            return ts.createBlock(ts.setTextRange(ts.createNodeArray(statements), /*location*/ node.members), 
             /*multiLine*/ true);
         }
         /**
@@ -47358,9 +56380,12 @@ var ts;
             // we pass false as 'generateNameForComputedPropertyName' for a backward compatibility purposes
             // old emitter always generate 'expression' part of the name as-is.
             var name = getExpressionForPropertyName(member, /*generateNameForComputedPropertyName*/ false);
-            return ts.createStatement(ts.createAssignment(ts.createElementAccess(currentNamespaceContainerName, ts.createAssignment(ts.createElementAccess(currentNamespaceContainerName, name), transformEnumMemberDeclarationValue(member))), name, 
-            /*location*/ member), 
-            /*location*/ member);
+            var valueExpression = transformEnumMemberDeclarationValue(member);
+            var innerAssignment = ts.createAssignment(ts.createElementAccess(currentNamespaceContainerName, name), valueExpression);
+            var outerAssignment = valueExpression.kind === 9 /* StringLiteral */ ?
+                innerAssignment :
+                ts.createAssignment(ts.createElementAccess(currentNamespaceContainerName, innerAssignment), name);
+            return ts.setTextRange(ts.createStatement(ts.setTextRange(outerAssignment, member)), member);
         }
         /**
          * Transforms the value of an enum member.
@@ -47390,9 +56415,15 @@ var ts;
         function shouldEmitModuleDeclaration(node) {
             return ts.isInstantiatedModule(node, compilerOptions.preserveConstEnums || compilerOptions.isolatedModules);
         }
-        function isES6ExportedDeclaration(node) {
-            return isExternalModuleExport(node)
-                && moduleKind === ts.ModuleKind.ES6;
+        /**
+         * Determines whether an exported declaration will have a qualified export name (e.g. `f.x`
+         * or `exports.x`).
+         */
+        function hasNamespaceQualifiedExportName(node) {
+            return isExportOfNamespace(node)
+                || (isExternalModuleExport(node)
+                    && moduleKind !== ts.ModuleKind.ES2015
+                    && moduleKind !== ts.ModuleKind.System);
         }
         /**
          * Records that a declaration was emitted in the current scope, if it was the first
@@ -47407,8 +56438,8 @@ var ts;
                 if (!currentScopeFirstDeclarationsOfName) {
                     currentScopeFirstDeclarationsOfName = ts.createMap();
                 }
-                if (!(name in currentScopeFirstDeclarationsOfName)) {
-                    currentScopeFirstDeclarationsOfName[name] = node;
+                if (!currentScopeFirstDeclarationsOfName.has(name)) {
+                    currentScopeFirstDeclarationsOfName.set(name, node);
                 }
             }
         }
@@ -47418,55 +56449,66 @@ var ts;
          */
         function isFirstEmittedDeclarationInScope(node) {
             if (currentScopeFirstDeclarationsOfName) {
-                var name_31 = node.symbol && node.symbol.name;
-                if (name_31) {
-                    return currentScopeFirstDeclarationsOfName[name_31] === node;
+                var name_48 = node.symbol && node.symbol.name;
+                if (name_48) {
+                    return currentScopeFirstDeclarationsOfName.get(name_48) === node;
                 }
             }
             return false;
         }
-        function shouldEmitVarForModuleDeclaration(node) {
-            return isFirstEmittedDeclarationInScope(node);
-        }
         /**
          * Adds a leading VariableStatement for a enum or module declaration.
          */
         function addVarForEnumOrModuleDeclaration(statements, node) {
-            // Emit a variable statement for the module.
-            var statement = ts.createVariableStatement(isES6ExportedDeclaration(node)
-                ? ts.visitNodes(node.modifiers, visitor, ts.isModifier)
-                : undefined, [
-                ts.createVariableDeclaration(getDeclarationName(node, /*allowComments*/ false, /*allowSourceMaps*/ true))
-            ]);
-            ts.setOriginalNode(statement, /*original*/ node);
-            // Adjust the source map emit to match the old emitter.
-            if (node.kind === 224 /* EnumDeclaration */) {
-                ts.setSourceMapRange(statement.declarationList, node);
-            }
-            else {
-                ts.setSourceMapRange(statement, node);
-            }
-            // Trailing comments for module declaration should be emitted after the function closure
-            // instead of the variable statement:
-            //
-            //     /** Module comment*/
-            //     module m1 {
-            //         function foo4Export() {
-            //         }
-            //     } // trailing comment module
-            //
-            // Should emit:
-            //
-            //     /** Module comment*/
-            //     var m1;
-            //     (function (m1) {
-            //         function foo4Export() {
-            //         }
-            //     })(m1 || (m1 = {})); // trailing comment module
-            //
-            ts.setCommentRange(statement, node);
-            ts.setEmitFlags(statement, 32768 /* NoTrailingComments */);
-            statements.push(statement);
+            // Emit a variable statement for the module. We emit top-level enums as a `var`
+            // declaration to avoid static errors in global scripts scripts due to redeclaration.
+            // enums in any other scope are emitted as a `let` declaration.
+            var statement = ts.createVariableStatement(ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), ts.createVariableDeclarationList([
+                ts.createVariableDeclaration(ts.getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ true))
+            ], currentScope.kind === 265 /* SourceFile */ ? 0 /* None */ : 1 /* Let */));
+            ts.setOriginalNode(statement, node);
+            recordEmittedDeclarationInScope(node);
+            if (isFirstEmittedDeclarationInScope(node)) {
+                // Adjust the source map emit to match the old emitter.
+                if (node.kind === 232 /* EnumDeclaration */) {
+                    ts.setSourceMapRange(statement.declarationList, node);
+                }
+                else {
+                    ts.setSourceMapRange(statement, node);
+                }
+                // Trailing comments for module declaration should be emitted after the function closure
+                // instead of the variable statement:
+                //
+                //     /** Module comment*/
+                //     module m1 {
+                //         function foo4Export() {
+                //         }
+                //     } // trailing comment module
+                //
+                // Should emit:
+                //
+                //     /** Module comment*/
+                //     var m1;
+                //     (function (m1) {
+                //         function foo4Export() {
+                //         }
+                //     })(m1 || (m1 = {})); // trailing comment module
+                //
+                ts.setCommentRange(statement, node);
+                ts.setEmitFlags(statement, 1024 /* NoTrailingComments */ | 4194304 /* HasEndOfDeclarationMarker */);
+                statements.push(statement);
+                return true;
+            }
+            else {
+                // For an EnumDeclaration or ModuleDeclaration that merges with a preceeding
+                // declaration we do not emit a leading variable declaration. To preserve the
+                // begin/end semantics of the declararation and to properly handle exports
+                // we wrap the leading variable declaration in a `MergeDeclarationMarker`.
+                var mergeMarker = ts.createMergeDeclarationMarker(statement);
+                ts.setEmitFlags(mergeMarker, 1536 /* NoComments */ | 4194304 /* HasEndOfDeclarationMarker */);
+                statements.push(mergeMarker);
+                return false;
+            }
         }
         /**
          * Visits a module declaration node.
@@ -47484,16 +56526,14 @@ var ts;
             var statements = [];
             // We request to be advised when the printer is about to print this node. This allows
             // us to set up the correct state for later substitutions.
-            var emitFlags = 64 /* AdviseOnEmitNode */;
+            var emitFlags = 2 /* AdviseOnEmitNode */;
             // If needed, we should emit a variable declaration for the module. If we emit
             // a leading variable declaration, we should not emit leading comments for the
             // module body.
-            recordEmittedDeclarationInScope(node);
-            if (shouldEmitVarForModuleDeclaration(node)) {
-                addVarForEnumOrModuleDeclaration(statements, node);
+            if (addVarForEnumOrModuleDeclaration(statements, node)) {
                 // We should still emit the comments if we are emitting a system module.
                 if (moduleKind !== ts.ModuleKind.System || currentScope !== currentSourceFile) {
-                    emitFlags |= 16384 /* NoLeadingComments */;
+                    emitFlags |= 512 /* NoLeadingComments */;
                 }
             }
             // `parameterName` is the declaration name used inside of the namespace.
@@ -47501,13 +56541,15 @@ var ts;
             // `containerName` is the expression used inside of the namespace for exports.
             var containerName = getNamespaceContainerName(node);
             // `exportName` is the expression used within this node's container for any exported references.
-            var exportName = getExportName(node);
+            var exportName = ts.hasModifier(node, 1 /* Export */)
+                ? ts.getExternalModuleOrNamespaceExportName(currentNamespaceContainerName, node, /*allowComments*/ false, /*allowSourceMaps*/ true)
+                : ts.getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ true);
             //  x || (x = {})
             //  exports.x || (exports.x = {})
             var moduleArg = ts.createLogicalOr(exportName, ts.createAssignment(exportName, ts.createObjectLiteral()));
-            if (ts.hasModifier(node, 1 /* Export */) && !isES6ExportedDeclaration(node)) {
+            if (hasNamespaceQualifiedExportName(node)) {
                 // `localName` is the expression used within this node's containing scope for any local references.
-                var localName = getLocalName(node);
+                var localName = ts.getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ true);
                 //  x = (exports.x || (exports.x = {}))
                 moduleArg = ts.createAssignment(localName, moduleArg);
             }
@@ -47515,15 +56557,19 @@ var ts;
             //      x_1.y = ...;
             //  })(x || (x = {}));
             var moduleStatement = ts.createStatement(ts.createCall(ts.createFunctionExpression(
+            /*modifiers*/ undefined, 
             /*asteriskToken*/ undefined, 
             /*name*/ undefined, 
-            /*typeParameters*/ undefined, [ts.createParameter(parameterName)], 
+            /*typeParameters*/ undefined, [ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, parameterName)], 
             /*type*/ undefined, transformModuleBody(node, containerName)), 
-            /*typeArguments*/ undefined, [moduleArg]), 
-            /*location*/ node);
+            /*typeArguments*/ undefined, [moduleArg]));
             ts.setOriginalNode(moduleStatement, node);
+            ts.setTextRange(moduleStatement, node);
             ts.setEmitFlags(moduleStatement, emitFlags);
             statements.push(moduleStatement);
+            // Add a DeclarationMarker for the namespace to preserve trailing comments and mark
+            // the end of the declaration.
+            statements.push(ts.createEndOfDeclarationMarker(node));
             return statements;
         }
         /**
@@ -47543,8 +56589,8 @@ var ts;
             var statementsLocation;
             var blockLocation;
             var body = node.body;
-            if (body.kind === 226 /* ModuleBlock */) {
-                ts.addRange(statements, ts.visitNodes(body.statements, namespaceElementVisitor, ts.isStatement));
+            if (body.kind === 234 /* ModuleBlock */) {
+                saveStateAndInvoke(body, function (body) { return ts.addRange(statements, ts.visitNodes(body.statements, namespaceElementVisitor, ts.isStatement)); });
                 statementsLocation = body.statements;
                 blockLocation = body;
             }
@@ -47565,10 +56611,10 @@ var ts;
             currentNamespaceContainerName = savedCurrentNamespaceContainerName;
             currentNamespace = savedCurrentNamespace;
             currentScopeFirstDeclarationsOfName = savedCurrentScopeFirstDeclarationsOfName;
-            var block = ts.createBlock(ts.createNodeArray(statements, 
+            var block = ts.createBlock(ts.setTextRange(ts.createNodeArray(statements), 
             /*location*/ statementsLocation), 
-            /*location*/ blockLocation, 
             /*multiLine*/ true);
+            ts.setTextRange(block, blockLocation);
             // namespace hello.hi.world {
             //      function foo() {}
             //
@@ -47589,17 +56635,127 @@ var ts;
             //     })(hi = hello.hi || (hello.hi = {}));
             // })(hello || (hello = {}));
             // We only want to emit comment on the namespace which contains block body itself, not the containing namespaces.
-            if (body.kind !== 226 /* ModuleBlock */) {
-                ts.setEmitFlags(block, ts.getEmitFlags(block) | 49152 /* NoComments */);
+            if (body.kind !== 234 /* ModuleBlock */) {
+                ts.setEmitFlags(block, ts.getEmitFlags(block) | 1536 /* NoComments */);
             }
             return block;
         }
         function getInnerMostModuleDeclarationFromDottedModule(moduleDeclaration) {
-            if (moduleDeclaration.body.kind === 225 /* ModuleDeclaration */) {
+            if (moduleDeclaration.body.kind === 233 /* ModuleDeclaration */) {
                 var recursiveInnerModule = getInnerMostModuleDeclarationFromDottedModule(moduleDeclaration.body);
                 return recursiveInnerModule || moduleDeclaration.body;
             }
         }
+        /**
+         * Visits an import declaration, eliding it if it is not referenced.
+         *
+         * @param node The import declaration node.
+         */
+        function visitImportDeclaration(node) {
+            if (!node.importClause) {
+                // Do not elide a side-effect only import declaration.
+                //  import "foo";
+                return node;
+            }
+            // Elide the declaration if the import clause was elided.
+            var importClause = ts.visitNode(node.importClause, visitImportClause, ts.isImportClause);
+            return importClause
+                ? ts.updateImportDeclaration(node, 
+                /*decorators*/ undefined, 
+                /*modifiers*/ undefined, importClause, node.moduleSpecifier)
+                : undefined;
+        }
+        /**
+         * Visits an import clause, eliding it if it is not referenced.
+         *
+         * @param node The import clause node.
+         */
+        function visitImportClause(node) {
+            // Elide the import clause if we elide both its name and its named bindings.
+            var name = resolver.isReferencedAliasDeclaration(node) ? node.name : undefined;
+            var namedBindings = ts.visitNode(node.namedBindings, visitNamedImportBindings, ts.isNamedImportBindings);
+            return (name || namedBindings) ? ts.updateImportClause(node, name, namedBindings) : undefined;
+        }
+        /**
+         * Visits named import bindings, eliding it if it is not referenced.
+         *
+         * @param node The named import bindings node.
+         */
+        function visitNamedImportBindings(node) {
+            if (node.kind === 240 /* NamespaceImport */) {
+                // Elide a namespace import if it is not referenced.
+                return resolver.isReferencedAliasDeclaration(node) ? node : undefined;
+            }
+            else {
+                // Elide named imports if all of its import specifiers are elided.
+                var elements = ts.visitNodes(node.elements, visitImportSpecifier, ts.isImportSpecifier);
+                return ts.some(elements) ? ts.updateNamedImports(node, elements) : undefined;
+            }
+        }
+        /**
+         * Visits an import specifier, eliding it if it is not referenced.
+         *
+         * @param node The import specifier node.
+         */
+        function visitImportSpecifier(node) {
+            // Elide an import specifier if it is not referenced.
+            return resolver.isReferencedAliasDeclaration(node) ? node : undefined;
+        }
+        /**
+         * Visits an export assignment, eliding it if it does not contain a clause that resolves
+         * to a value.
+         *
+         * @param node The export assignment node.
+         */
+        function visitExportAssignment(node) {
+            // Elide the export assignment if it does not reference a value.
+            return resolver.isValueAliasDeclaration(node)
+                ? ts.visitEachChild(node, visitor, context)
+                : undefined;
+        }
+        /**
+         * Visits an export declaration, eliding it if it does not contain a clause that resolves
+         * to a value.
+         *
+         * @param node The export declaration node.
+         */
+        function visitExportDeclaration(node) {
+            if (!node.exportClause) {
+                // Elide a star export if the module it references does not export a value.
+                return compilerOptions.isolatedModules || resolver.moduleExportsSomeValue(node.moduleSpecifier) ? node : undefined;
+            }
+            if (!resolver.isValueAliasDeclaration(node)) {
+                // Elide the export declaration if it does not export a value.
+                return undefined;
+            }
+            // Elide the export declaration if all of its named exports are elided.
+            var exportClause = ts.visitNode(node.exportClause, visitNamedExports, ts.isNamedExports);
+            return exportClause
+                ? ts.updateExportDeclaration(node, 
+                /*decorators*/ undefined, 
+                /*modifiers*/ undefined, exportClause, node.moduleSpecifier)
+                : undefined;
+        }
+        /**
+         * Visits named exports, eliding it if it does not contain an export specifier that
+         * resolves to a value.
+         *
+         * @param node The named exports node.
+         */
+        function visitNamedExports(node) {
+            // Elide the named exports if all of its export specifiers were elided.
+            var elements = ts.visitNodes(node.elements, visitExportSpecifier, ts.isExportSpecifier);
+            return ts.some(elements) ? ts.updateNamedExports(node, elements) : undefined;
+        }
+        /**
+         * Visits an export specifier, eliding it if it does not resolve to a value.
+         *
+         * @param node The export specifier node.
+         */
+        function visitExportSpecifier(node) {
+            // Elide an export specifier if it does not reference a value.
+            return resolver.isValueAliasDeclaration(node) ? node : undefined;
+        }
         /**
          * Determines whether to emit an import equals declaration.
          *
@@ -47620,20 +56776,23 @@ var ts;
          */
         function visitImportEqualsDeclaration(node) {
             if (ts.isExternalModuleImportEqualsDeclaration(node)) {
-                return ts.visitEachChild(node, visitor, context);
+                // Elide external module `import=` if it is not referenced.
+                return resolver.isReferencedAliasDeclaration(node)
+                    ? ts.visitEachChild(node, visitor, context)
+                    : undefined;
             }
             if (!shouldEmitImportEqualsDeclaration(node)) {
                 return undefined;
             }
             var moduleReference = ts.createExpressionFromEntityName(node.moduleReference);
-            ts.setEmitFlags(moduleReference, 49152 /* NoComments */ | 65536 /* NoNestedComments */);
-            if (isNamedExternalModuleExport(node) || !isNamespaceExport(node)) {
+            ts.setEmitFlags(moduleReference, 1536 /* NoComments */ | 2048 /* NoNestedComments */);
+            if (isNamedExternalModuleExport(node) || !isExportOfNamespace(node)) {
                 //  export var ${name} = ${moduleReference};
                 //  var ${name} = ${moduleReference};
-                return ts.setOriginalNode(ts.createVariableStatement(ts.visitNodes(node.modifiers, visitor, ts.isModifier), ts.createVariableDeclarationList([
-                    ts.createVariableDeclaration(node.name, 
-                    /*type*/ undefined, moduleReference)
-                ]), node), node);
+                return ts.setOriginalNode(ts.setTextRange(ts.createVariableStatement(ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), ts.createVariableDeclarationList([
+                    ts.setOriginalNode(ts.createVariableDeclaration(node.name, 
+                    /*type*/ undefined, moduleReference), node)
+                ])), node), node);
             }
             else {
                 // exports.${name} = ${moduleReference};
@@ -47645,7 +56804,7 @@ var ts;
          *
          * @param node The node to test.
          */
-        function isNamespaceExport(node) {
+        function isExportOfNamespace(node) {
             return currentNamespace !== undefined && ts.hasModifier(node, 1 /* Export */);
         }
         /**
@@ -47678,379 +56837,1262 @@ var ts;
          * Creates a statement for the provided expression. This is used in calls to `map`.
          */
         function expressionToStatement(expression) {
-            return ts.createStatement(expression, /*location*/ undefined);
+            return ts.createStatement(expression);
         }
         function addExportMemberAssignment(statements, node) {
-            var expression = ts.createAssignment(getExportName(node), getLocalName(node, /*noSourceMaps*/ true));
+            var expression = ts.createAssignment(ts.getExternalModuleOrNamespaceExportName(currentNamespaceContainerName, node, /*allowComments*/ false, /*allowSourceMaps*/ true), ts.getLocalName(node));
             ts.setSourceMapRange(expression, ts.createRange(node.name.pos, node.end));
             var statement = ts.createStatement(expression);
             ts.setSourceMapRange(statement, ts.createRange(-1, node.end));
             statements.push(statement);
         }
-        function createNamespaceExport(exportName, exportValue, location) {
-            return ts.createStatement(ts.createAssignment(getNamespaceMemberName(exportName, /*allowComments*/ false, /*allowSourceMaps*/ true), exportValue), location);
+        function createNamespaceExport(exportName, exportValue, location) {
+            return ts.setTextRange(ts.createStatement(ts.createAssignment(ts.getNamespaceMemberName(currentNamespaceContainerName, exportName, /*allowComments*/ false, /*allowSourceMaps*/ true), exportValue)), location);
+        }
+        function createNamespaceExportExpression(exportName, exportValue, location) {
+            return ts.setTextRange(ts.createAssignment(getNamespaceMemberNameWithSourceMapsAndWithoutComments(exportName), exportValue), location);
+        }
+        function getNamespaceMemberNameWithSourceMapsAndWithoutComments(name) {
+            return ts.getNamespaceMemberName(currentNamespaceContainerName, name, /*allowComments*/ false, /*allowSourceMaps*/ true);
+        }
+        /**
+         * Gets the declaration name used inside of a namespace or enum.
+         */
+        function getNamespaceParameterName(node) {
+            var name = ts.getGeneratedNameForNode(node);
+            ts.setSourceMapRange(name, node.name);
+            return name;
+        }
+        /**
+         * Gets the expression used to refer to a namespace or enum within the body
+         * of its declaration.
+         */
+        function getNamespaceContainerName(node) {
+            return ts.getGeneratedNameForNode(node);
+        }
+        /**
+         * Gets a local alias for a class declaration if it is a decorated class with an internal
+         * reference to the static side of the class. This is necessary to avoid issues with
+         * double-binding semantics for the class name.
+         */
+        function getClassAliasIfNeeded(node) {
+            if (resolver.getNodeCheckFlags(node) & 8388608 /* ClassWithConstructorReference */) {
+                enableSubstitutionForClassAliases();
+                var classAlias = ts.createUniqueName(node.name && !ts.isGeneratedIdentifier(node.name) ? ts.unescapeIdentifier(node.name.text) : "default");
+                classAliases[ts.getOriginalNodeId(node)] = classAlias;
+                hoistVariableDeclaration(classAlias);
+                return classAlias;
+            }
+        }
+        function getClassPrototype(node) {
+            return ts.createPropertyAccess(ts.getDeclarationName(node), "prototype");
+        }
+        function getClassMemberPrefix(node, member) {
+            return ts.hasModifier(member, 32 /* Static */)
+                ? ts.getDeclarationName(node)
+                : getClassPrototype(node);
+        }
+        function enableSubstitutionForNonQualifiedEnumMembers() {
+            if ((enabledSubstitutions & 8 /* NonQualifiedEnumMembers */) === 0) {
+                enabledSubstitutions |= 8 /* NonQualifiedEnumMembers */;
+                context.enableSubstitution(71 /* Identifier */);
+            }
+        }
+        function enableSubstitutionForClassAliases() {
+            if ((enabledSubstitutions & 1 /* ClassAliases */) === 0) {
+                enabledSubstitutions |= 1 /* ClassAliases */;
+                // We need to enable substitutions for identifiers. This allows us to
+                // substitute class names inside of a class declaration.
+                context.enableSubstitution(71 /* Identifier */);
+                // Keep track of class aliases.
+                classAliases = [];
+            }
+        }
+        function enableSubstitutionForNamespaceExports() {
+            if ((enabledSubstitutions & 2 /* NamespaceExports */) === 0) {
+                enabledSubstitutions |= 2 /* NamespaceExports */;
+                // We need to enable substitutions for identifiers and shorthand property assignments. This allows us to
+                // substitute the names of exported members of a namespace.
+                context.enableSubstitution(71 /* Identifier */);
+                context.enableSubstitution(262 /* ShorthandPropertyAssignment */);
+                // We need to be notified when entering and exiting namespaces.
+                context.enableEmitNotification(233 /* ModuleDeclaration */);
+            }
+        }
+        function isTransformedModuleDeclaration(node) {
+            return ts.getOriginalNode(node).kind === 233 /* ModuleDeclaration */;
+        }
+        function isTransformedEnumDeclaration(node) {
+            return ts.getOriginalNode(node).kind === 232 /* EnumDeclaration */;
+        }
+        /**
+         * Hook for node emit.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to emit.
+         * @param emit A callback used to emit the node in the printer.
+         */
+        function onEmitNode(hint, node, emitCallback) {
+            var savedApplicableSubstitutions = applicableSubstitutions;
+            var savedCurrentSourceFile = currentSourceFile;
+            if (ts.isSourceFile(node)) {
+                currentSourceFile = node;
+            }
+            if (enabledSubstitutions & 2 /* NamespaceExports */ && isTransformedModuleDeclaration(node)) {
+                applicableSubstitutions |= 2 /* NamespaceExports */;
+            }
+            if (enabledSubstitutions & 8 /* NonQualifiedEnumMembers */ && isTransformedEnumDeclaration(node)) {
+                applicableSubstitutions |= 8 /* NonQualifiedEnumMembers */;
+            }
+            previousOnEmitNode(hint, node, emitCallback);
+            applicableSubstitutions = savedApplicableSubstitutions;
+            currentSourceFile = savedCurrentSourceFile;
+        }
+        /**
+         * Hooks node substitutions.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to substitute.
+         */
+        function onSubstituteNode(hint, node) {
+            node = previousOnSubstituteNode(hint, node);
+            if (hint === 1 /* Expression */) {
+                return substituteExpression(node);
+            }
+            else if (ts.isShorthandPropertyAssignment(node)) {
+                return substituteShorthandPropertyAssignment(node);
+            }
+            return node;
+        }
+        function substituteShorthandPropertyAssignment(node) {
+            if (enabledSubstitutions & 2 /* NamespaceExports */) {
+                var name_49 = node.name;
+                var exportedName = trySubstituteNamespaceExportedName(name_49);
+                if (exportedName) {
+                    // A shorthand property with an assignment initializer is probably part of a
+                    // destructuring assignment
+                    if (node.objectAssignmentInitializer) {
+                        var initializer = ts.createAssignment(exportedName, node.objectAssignmentInitializer);
+                        return ts.setTextRange(ts.createPropertyAssignment(name_49, initializer), node);
+                    }
+                    return ts.setTextRange(ts.createPropertyAssignment(name_49, exportedName), node);
+                }
+            }
+            return node;
+        }
+        function substituteExpression(node) {
+            switch (node.kind) {
+                case 71 /* Identifier */:
+                    return substituteExpressionIdentifier(node);
+                case 179 /* PropertyAccessExpression */:
+                    return substitutePropertyAccessExpression(node);
+                case 180 /* ElementAccessExpression */:
+                    return substituteElementAccessExpression(node);
+            }
+            return node;
+        }
+        function substituteExpressionIdentifier(node) {
+            return trySubstituteClassAlias(node)
+                || trySubstituteNamespaceExportedName(node)
+                || node;
+        }
+        function trySubstituteClassAlias(node) {
+            if (enabledSubstitutions & 1 /* ClassAliases */) {
+                if (resolver.getNodeCheckFlags(node) & 16777216 /* ConstructorReferenceInClass */) {
+                    // Due to the emit for class decorators, any reference to the class from inside of the class body
+                    // must instead be rewritten to point to a temporary variable to avoid issues with the double-bind
+                    // behavior of class names in ES6.
+                    // Also, when emitting statics for class expressions, we must substitute a class alias for
+                    // constructor references in static property initializers.
+                    var declaration = resolver.getReferencedValueDeclaration(node);
+                    if (declaration) {
+                        var classAlias = classAliases[declaration.id];
+                        if (classAlias) {
+                            var clone_1 = ts.getSynthesizedClone(classAlias);
+                            ts.setSourceMapRange(clone_1, node);
+                            ts.setCommentRange(clone_1, node);
+                            return clone_1;
+                        }
+                    }
+                }
+            }
+            return undefined;
+        }
+        function trySubstituteNamespaceExportedName(node) {
+            // If this is explicitly a local name, do not substitute.
+            if (enabledSubstitutions & applicableSubstitutions && !ts.isGeneratedIdentifier(node) && !ts.isLocalName(node)) {
+                // If we are nested within a namespace declaration, we may need to qualifiy
+                // an identifier that is exported from a merged namespace.
+                var container = resolver.getReferencedExportContainer(node, /*prefixLocals*/ false);
+                if (container && container.kind !== 265 /* SourceFile */) {
+                    var substitute = (applicableSubstitutions & 2 /* NamespaceExports */ && container.kind === 233 /* ModuleDeclaration */) ||
+                        (applicableSubstitutions & 8 /* NonQualifiedEnumMembers */ && container.kind === 232 /* EnumDeclaration */);
+                    if (substitute) {
+                        return ts.setTextRange(ts.createPropertyAccess(ts.getGeneratedNameForNode(container), node), 
+                        /*location*/ node);
+                    }
+                }
+            }
+            return undefined;
+        }
+        function substitutePropertyAccessExpression(node) {
+            return substituteConstantValue(node);
+        }
+        function substituteElementAccessExpression(node) {
+            return substituteConstantValue(node);
+        }
+        function substituteConstantValue(node) {
+            var constantValue = tryGetConstEnumValue(node);
+            if (constantValue !== undefined) {
+                // track the constant value on the node for the printer in needsDotDotForPropertyAccess
+                ts.setConstantValue(node, constantValue);
+                var substitute = ts.createLiteral(constantValue);
+                if (!compilerOptions.removeComments) {
+                    var propertyName = ts.isPropertyAccessExpression(node)
+                        ? ts.declarationNameToString(node.name)
+                        : ts.getTextOfNode(node.argumentExpression);
+                    ts.addSyntheticTrailingComment(substitute, 3 /* MultiLineCommentTrivia */, " " + propertyName + " ");
+                }
+                return substitute;
+            }
+            return node;
+        }
+        function tryGetConstEnumValue(node) {
+            if (compilerOptions.isolatedModules) {
+                return undefined;
+            }
+            return ts.isPropertyAccessExpression(node) || ts.isElementAccessExpression(node)
+                ? resolver.getConstantValue(node)
+                : undefined;
+        }
+    }
+    ts.transformTypeScript = transformTypeScript;
+    function createDecorateHelper(context, decoratorExpressions, target, memberName, descriptor, location) {
+        var argumentsArray = [];
+        argumentsArray.push(ts.createArrayLiteral(decoratorExpressions, /*multiLine*/ true));
+        argumentsArray.push(target);
+        if (memberName) {
+            argumentsArray.push(memberName);
+            if (descriptor) {
+                argumentsArray.push(descriptor);
+            }
+        }
+        context.requestEmitHelper(decorateHelper);
+        return ts.setTextRange(ts.createCall(ts.getHelperName("__decorate"), 
+        /*typeArguments*/ undefined, argumentsArray), location);
+    }
+    var decorateHelper = {
+        name: "typescript:decorate",
+        scoped: false,
+        priority: 2,
+        text: "\n            var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {\n                var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;\n                if (typeof Reflect === \"object\" && typeof Reflect.decorate === \"function\") r = Reflect.decorate(decorators, target, key, desc);\n                else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;\n                return c > 3 && r && Object.defineProperty(target, key, r), r;\n            };"
+    };
+    function createMetadataHelper(context, metadataKey, metadataValue) {
+        context.requestEmitHelper(metadataHelper);
+        return ts.createCall(ts.getHelperName("__metadata"), 
+        /*typeArguments*/ undefined, [
+            ts.createLiteral(metadataKey),
+            metadataValue
+        ]);
+    }
+    var metadataHelper = {
+        name: "typescript:metadata",
+        scoped: false,
+        priority: 3,
+        text: "\n            var __metadata = (this && this.__metadata) || function (k, v) {\n                if (typeof Reflect === \"object\" && typeof Reflect.metadata === \"function\") return Reflect.metadata(k, v);\n            };"
+    };
+    function createParamHelper(context, expression, parameterOffset, location) {
+        context.requestEmitHelper(paramHelper);
+        return ts.setTextRange(ts.createCall(ts.getHelperName("__param"), 
+        /*typeArguments*/ undefined, [
+            ts.createLiteral(parameterOffset),
+            expression
+        ]), location);
+    }
+    var paramHelper = {
+        name: "typescript:param",
+        scoped: false,
+        priority: 4,
+        text: "\n            var __param = (this && this.__param) || function (paramIndex, decorator) {\n                return function (target, key) { decorator(target, key, paramIndex); }\n            };"
+    };
+})(ts || (ts = {}));
+/// <reference path="../factory.ts" />
+/// <reference path="../visitor.ts" />
+/*@internal*/
+var ts;
+(function (ts) {
+    var ES2017SubstitutionFlags;
+    (function (ES2017SubstitutionFlags) {
+        /** Enables substitutions for async methods with `super` calls. */
+        ES2017SubstitutionFlags[ES2017SubstitutionFlags["AsyncMethodsWithSuper"] = 1] = "AsyncMethodsWithSuper";
+    })(ES2017SubstitutionFlags || (ES2017SubstitutionFlags = {}));
+    function transformES2017(context) {
+        var startLexicalEnvironment = context.startLexicalEnvironment, resumeLexicalEnvironment = context.resumeLexicalEnvironment, endLexicalEnvironment = context.endLexicalEnvironment;
+        var resolver = context.getEmitResolver();
+        var compilerOptions = context.getCompilerOptions();
+        var languageVersion = ts.getEmitScriptTarget(compilerOptions);
+        // These variables contain state that changes as we descend into the tree.
+        var currentSourceFile;
+        /**
+         * Keeps track of whether expression substitution has been enabled for specific edge cases.
+         * They are persisted between each SourceFile transformation and should not be reset.
+         */
+        var enabledSubstitutions;
+        /**
+         * This keeps track of containers where `super` is valid, for use with
+         * just-in-time substitution for `super` expressions inside of async methods.
+         */
+        var enclosingSuperContainerFlags = 0;
+        // Save the previous transformation hooks.
+        var previousOnEmitNode = context.onEmitNode;
+        var previousOnSubstituteNode = context.onSubstituteNode;
+        // Set new transformation hooks.
+        context.onEmitNode = onEmitNode;
+        context.onSubstituteNode = onSubstituteNode;
+        return transformSourceFile;
+        function transformSourceFile(node) {
+            if (node.isDeclarationFile) {
+                return node;
+            }
+            currentSourceFile = node;
+            var visited = ts.visitEachChild(node, visitor, context);
+            ts.addEmitHelpers(visited, context.readEmitHelpers());
+            currentSourceFile = undefined;
+            return visited;
+        }
+        function visitor(node) {
+            if ((node.transformFlags & 16 /* ContainsES2017 */) === 0) {
+                return node;
+            }
+            switch (node.kind) {
+                case 120 /* AsyncKeyword */:
+                    // ES2017 async modifier should be elided for targets < ES2017
+                    return undefined;
+                case 191 /* AwaitExpression */:
+                    return visitAwaitExpression(node);
+                case 151 /* MethodDeclaration */:
+                    return visitMethodDeclaration(node);
+                case 228 /* FunctionDeclaration */:
+                    return visitFunctionDeclaration(node);
+                case 186 /* FunctionExpression */:
+                    return visitFunctionExpression(node);
+                case 187 /* ArrowFunction */:
+                    return visitArrowFunction(node);
+                default:
+                    return ts.visitEachChild(node, visitor, context);
+            }
+        }
+        /**
+         * Visits an AwaitExpression node.
+         *
+         * This function will be called any time a ES2017 await expression is encountered.
+         *
+         * @param node The node to visit.
+         */
+        function visitAwaitExpression(node) {
+            return ts.setOriginalNode(ts.setTextRange(ts.createYield(
+            /*asteriskToken*/ undefined, ts.visitNode(node.expression, visitor, ts.isExpression)), node), node);
+        }
+        /**
+         * Visits a MethodDeclaration node.
+         *
+         * This function will be called when one of the following conditions are met:
+         * - The node is marked as async
+         *
+         * @param node The node to visit.
+         */
+        function visitMethodDeclaration(node) {
+            return ts.updateMethod(node, 
+            /*decorators*/ undefined, ts.visitNodes(node.modifiers, visitor, ts.isModifier), node.asteriskToken, node.name, 
+            /*questionToken*/ undefined, 
+            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
+            /*type*/ undefined, ts.getFunctionFlags(node) & 2 /* Async */
+                ? transformAsyncFunctionBody(node)
+                : ts.visitFunctionBody(node.body, visitor, context));
+        }
+        /**
+         * Visits a FunctionDeclaration node.
+         *
+         * This function will be called when one of the following conditions are met:
+         * - The node is marked async
+         *
+         * @param node The node to visit.
+         */
+        function visitFunctionDeclaration(node) {
+            return ts.updateFunctionDeclaration(node, 
+            /*decorators*/ undefined, ts.visitNodes(node.modifiers, visitor, ts.isModifier), node.asteriskToken, node.name, 
+            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
+            /*type*/ undefined, ts.getFunctionFlags(node) & 2 /* Async */
+                ? transformAsyncFunctionBody(node)
+                : ts.visitFunctionBody(node.body, visitor, context));
+        }
+        /**
+         * Visits a FunctionExpression node.
+         *
+         * This function will be called when one of the following conditions are met:
+         * - The node is marked async
+         *
+         * @param node The node to visit.
+         */
+        function visitFunctionExpression(node) {
+            return ts.updateFunctionExpression(node, ts.visitNodes(node.modifiers, visitor, ts.isModifier), node.asteriskToken, node.name, 
+            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
+            /*type*/ undefined, ts.getFunctionFlags(node) & 2 /* Async */
+                ? transformAsyncFunctionBody(node)
+                : ts.visitFunctionBody(node.body, visitor, context));
+        }
+        /**
+         * Visits an ArrowFunction.
+         *
+         * This function will be called when one of the following conditions are met:
+         * - The node is marked async
+         *
+         * @param node The node to visit.
+         */
+        function visitArrowFunction(node) {
+            return ts.updateArrowFunction(node, ts.visitNodes(node.modifiers, visitor, ts.isModifier), 
+            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
+            /*type*/ undefined, ts.getFunctionFlags(node) & 2 /* Async */
+                ? transformAsyncFunctionBody(node)
+                : ts.visitFunctionBody(node.body, visitor, context));
+        }
+        function transformAsyncFunctionBody(node) {
+            resumeLexicalEnvironment();
+            var original = ts.getOriginalNode(node, ts.isFunctionLike);
+            var nodeType = original.type;
+            var promiseConstructor = languageVersion < 2 /* ES2015 */ ? getPromiseConstructor(nodeType) : undefined;
+            var isArrowFunction = node.kind === 187 /* ArrowFunction */;
+            var hasLexicalArguments = (resolver.getNodeCheckFlags(node) & 8192 /* CaptureArguments */) !== 0;
+            // An async function is emit as an outer function that calls an inner
+            // generator function. To preserve lexical bindings, we pass the current
+            // `this` and `arguments` objects to `__awaiter`. The generator function
+            // passed to `__awaiter` is executed inside of the callback to the
+            // promise constructor.
+            if (!isArrowFunction) {
+                var statements = [];
+                var statementOffset = ts.addPrologue(statements, node.body.statements, /*ensureUseStrict*/ false, visitor);
+                statements.push(ts.createReturn(createAwaiterHelper(context, hasLexicalArguments, promiseConstructor, transformFunctionBodyWorker(node.body, statementOffset))));
+                ts.addRange(statements, endLexicalEnvironment());
+                var block = ts.createBlock(statements, /*multiLine*/ true);
+                ts.setTextRange(block, node.body);
+                // Minor optimization, emit `_super` helper to capture `super` access in an arrow.
+                // This step isn't needed if we eventually transform this to ES5.
+                if (languageVersion >= 2 /* ES2015 */) {
+                    if (resolver.getNodeCheckFlags(node) & 4096 /* AsyncMethodWithSuperBinding */) {
+                        enableSubstitutionForAsyncMethodsWithSuper();
+                        ts.addEmitHelper(block, ts.advancedAsyncSuperHelper);
+                    }
+                    else if (resolver.getNodeCheckFlags(node) & 2048 /* AsyncMethodWithSuper */) {
+                        enableSubstitutionForAsyncMethodsWithSuper();
+                        ts.addEmitHelper(block, ts.asyncSuperHelper);
+                    }
+                }
+                return block;
+            }
+            else {
+                var expression = createAwaiterHelper(context, hasLexicalArguments, promiseConstructor, transformFunctionBodyWorker(node.body));
+                var declarations = endLexicalEnvironment();
+                if (ts.some(declarations)) {
+                    var block = ts.convertToFunctionBody(expression);
+                    return ts.updateBlock(block, ts.setTextRange(ts.createNodeArray(ts.concatenate(block.statements, declarations)), block.statements));
+                }
+                return expression;
+            }
+        }
+        function transformFunctionBodyWorker(body, start) {
+            if (ts.isBlock(body)) {
+                return ts.updateBlock(body, ts.visitLexicalEnvironment(body.statements, visitor, context, start));
+            }
+            else {
+                startLexicalEnvironment();
+                var visited = ts.convertToFunctionBody(ts.visitNode(body, visitor, ts.isConciseBody));
+                var declarations = endLexicalEnvironment();
+                return ts.updateBlock(visited, ts.setTextRange(ts.createNodeArray(ts.concatenate(visited.statements, declarations)), visited.statements));
+            }
+        }
+        function getPromiseConstructor(type) {
+            var typeName = type && ts.getEntityNameFromTypeNode(type);
+            if (typeName && ts.isEntityName(typeName)) {
+                var serializationKind = resolver.getTypeReferenceSerializationKind(typeName);
+                if (serializationKind === ts.TypeReferenceSerializationKind.TypeWithConstructSignatureAndValue
+                    || serializationKind === ts.TypeReferenceSerializationKind.Unknown) {
+                    return typeName;
+                }
+            }
+            return undefined;
+        }
+        function enableSubstitutionForAsyncMethodsWithSuper() {
+            if ((enabledSubstitutions & 1 /* AsyncMethodsWithSuper */) === 0) {
+                enabledSubstitutions |= 1 /* AsyncMethodsWithSuper */;
+                // We need to enable substitutions for call, property access, and element access
+                // if we need to rewrite super calls.
+                context.enableSubstitution(181 /* CallExpression */);
+                context.enableSubstitution(179 /* PropertyAccessExpression */);
+                context.enableSubstitution(180 /* ElementAccessExpression */);
+                // We need to be notified when entering and exiting declarations that bind super.
+                context.enableEmitNotification(229 /* ClassDeclaration */);
+                context.enableEmitNotification(151 /* MethodDeclaration */);
+                context.enableEmitNotification(153 /* GetAccessor */);
+                context.enableEmitNotification(154 /* SetAccessor */);
+                context.enableEmitNotification(152 /* Constructor */);
+            }
+        }
+        /**
+         * Hook for node emit.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to emit.
+         * @param emit A callback used to emit the node in the printer.
+         */
+        function onEmitNode(hint, node, emitCallback) {
+            // If we need to support substitutions for `super` in an async method,
+            // we should track it here.
+            if (enabledSubstitutions & 1 /* AsyncMethodsWithSuper */ && isSuperContainer(node)) {
+                var superContainerFlags = resolver.getNodeCheckFlags(node) & (2048 /* AsyncMethodWithSuper */ | 4096 /* AsyncMethodWithSuperBinding */);
+                if (superContainerFlags !== enclosingSuperContainerFlags) {
+                    var savedEnclosingSuperContainerFlags = enclosingSuperContainerFlags;
+                    enclosingSuperContainerFlags = superContainerFlags;
+                    previousOnEmitNode(hint, node, emitCallback);
+                    enclosingSuperContainerFlags = savedEnclosingSuperContainerFlags;
+                    return;
+                }
+            }
+            previousOnEmitNode(hint, node, emitCallback);
+        }
+        /**
+         * Hooks node substitutions.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to substitute.
+         */
+        function onSubstituteNode(hint, node) {
+            node = previousOnSubstituteNode(hint, node);
+            if (hint === 1 /* Expression */ && enclosingSuperContainerFlags) {
+                return substituteExpression(node);
+            }
+            return node;
+        }
+        function substituteExpression(node) {
+            switch (node.kind) {
+                case 179 /* PropertyAccessExpression */:
+                    return substitutePropertyAccessExpression(node);
+                case 180 /* ElementAccessExpression */:
+                    return substituteElementAccessExpression(node);
+                case 181 /* CallExpression */:
+                    return substituteCallExpression(node);
+            }
+            return node;
+        }
+        function substitutePropertyAccessExpression(node) {
+            if (node.expression.kind === 97 /* SuperKeyword */) {
+                return createSuperAccessInAsyncMethod(ts.createLiteral(node.name.text), node);
+            }
+            return node;
+        }
+        function substituteElementAccessExpression(node) {
+            if (node.expression.kind === 97 /* SuperKeyword */) {
+                return createSuperAccessInAsyncMethod(node.argumentExpression, node);
+            }
+            return node;
+        }
+        function substituteCallExpression(node) {
+            var expression = node.expression;
+            if (ts.isSuperProperty(expression)) {
+                var argumentExpression = ts.isPropertyAccessExpression(expression)
+                    ? substitutePropertyAccessExpression(expression)
+                    : substituteElementAccessExpression(expression);
+                return ts.createCall(ts.createPropertyAccess(argumentExpression, "call"), 
+                /*typeArguments*/ undefined, [
+                    ts.createThis()
+                ].concat(node.arguments));
+            }
+            return node;
+        }
+        function isSuperContainer(node) {
+            var kind = node.kind;
+            return kind === 229 /* ClassDeclaration */
+                || kind === 152 /* Constructor */
+                || kind === 151 /* MethodDeclaration */
+                || kind === 153 /* GetAccessor */
+                || kind === 154 /* SetAccessor */;
+        }
+        function createSuperAccessInAsyncMethod(argumentExpression, location) {
+            if (enclosingSuperContainerFlags & 4096 /* AsyncMethodWithSuperBinding */) {
+                return ts.setTextRange(ts.createPropertyAccess(ts.createCall(ts.createIdentifier("_super"), 
+                /*typeArguments*/ undefined, [argumentExpression]), "value"), location);
+            }
+            else {
+                return ts.setTextRange(ts.createCall(ts.createIdentifier("_super"), 
+                /*typeArguments*/ undefined, [argumentExpression]), location);
+            }
+        }
+    }
+    ts.transformES2017 = transformES2017;
+    var awaiterHelper = {
+        name: "typescript:awaiter",
+        scoped: false,
+        priority: 5,
+        text: "\n            var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {\n                return new (P || (P = Promise))(function (resolve, reject) {\n                    function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }\n                    function rejected(value) { try { step(generator[\"throw\"](value)); } catch (e) { reject(e); } }\n                    function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }\n                    step((generator = generator.apply(thisArg, _arguments || [])).next());\n                });\n            };"
+    };
+    function createAwaiterHelper(context, hasLexicalArguments, promiseConstructor, body) {
+        context.requestEmitHelper(awaiterHelper);
+        var generatorFunc = ts.createFunctionExpression(
+        /*modifiers*/ undefined, ts.createToken(39 /* AsteriskToken */), 
+        /*name*/ undefined, 
+        /*typeParameters*/ undefined, 
+        /*parameters*/ [], 
+        /*type*/ undefined, body);
+        // Mark this node as originally an async function
+        (generatorFunc.emitNode || (generatorFunc.emitNode = {})).flags |= 262144 /* AsyncFunctionBody */;
+        return ts.createCall(ts.getHelperName("__awaiter"), 
+        /*typeArguments*/ undefined, [
+            ts.createThis(),
+            hasLexicalArguments ? ts.createIdentifier("arguments") : ts.createVoidZero(),
+            promiseConstructor ? ts.createExpressionFromEntityName(promiseConstructor) : ts.createVoidZero(),
+            generatorFunc
+        ]);
+    }
+    ts.asyncSuperHelper = {
+        name: "typescript:async-super",
+        scoped: true,
+        text: "\n            const _super = name => super[name];\n        "
+    };
+    ts.advancedAsyncSuperHelper = {
+        name: "typescript:advanced-async-super",
+        scoped: true,
+        text: "\n            const _super = (function (geti, seti) {\n                const cache = Object.create(null);\n                return name => cache[name] || (cache[name] = { get value() { return geti(name); }, set value(v) { seti(name, v); } });\n            })(name => super[name], (name, value) => super[name] = value);\n        "
+    };
+})(ts || (ts = {}));
+/// <reference path="../factory.ts" />
+/// <reference path="../visitor.ts" />
+/// <reference path="es2017.ts" />
+/*@internal*/
+var ts;
+(function (ts) {
+    var ESNextSubstitutionFlags;
+    (function (ESNextSubstitutionFlags) {
+        /** Enables substitutions for async methods with `super` calls. */
+        ESNextSubstitutionFlags[ESNextSubstitutionFlags["AsyncMethodsWithSuper"] = 1] = "AsyncMethodsWithSuper";
+    })(ESNextSubstitutionFlags || (ESNextSubstitutionFlags = {}));
+    function transformESNext(context) {
+        var resumeLexicalEnvironment = context.resumeLexicalEnvironment, endLexicalEnvironment = context.endLexicalEnvironment, hoistVariableDeclaration = context.hoistVariableDeclaration;
+        var resolver = context.getEmitResolver();
+        var compilerOptions = context.getCompilerOptions();
+        var languageVersion = ts.getEmitScriptTarget(compilerOptions);
+        var previousOnEmitNode = context.onEmitNode;
+        context.onEmitNode = onEmitNode;
+        var previousOnSubstituteNode = context.onSubstituteNode;
+        context.onSubstituteNode = onSubstituteNode;
+        var enabledSubstitutions;
+        var enclosingFunctionFlags;
+        var enclosingSuperContainerFlags = 0;
+        return transformSourceFile;
+        function transformSourceFile(node) {
+            if (node.isDeclarationFile) {
+                return node;
+            }
+            var visited = ts.visitEachChild(node, visitor, context);
+            ts.addEmitHelpers(visited, context.readEmitHelpers());
+            return visited;
+        }
+        function visitor(node) {
+            return visitorWorker(node, /*noDestructuringValue*/ false);
+        }
+        function visitorNoDestructuringValue(node) {
+            return visitorWorker(node, /*noDestructuringValue*/ true);
+        }
+        function visitorNoAsyncModifier(node) {
+            if (node.kind === 120 /* AsyncKeyword */) {
+                return undefined;
+            }
+            return node;
+        }
+        function visitorWorker(node, noDestructuringValue) {
+            if ((node.transformFlags & 8 /* ContainsESNext */) === 0) {
+                return node;
+            }
+            switch (node.kind) {
+                case 191 /* AwaitExpression */:
+                    return visitAwaitExpression(node);
+                case 197 /* YieldExpression */:
+                    return visitYieldExpression(node);
+                case 222 /* LabeledStatement */:
+                    return visitLabeledStatement(node);
+                case 178 /* ObjectLiteralExpression */:
+                    return visitObjectLiteralExpression(node);
+                case 194 /* BinaryExpression */:
+                    return visitBinaryExpression(node, noDestructuringValue);
+                case 226 /* VariableDeclaration */:
+                    return visitVariableDeclaration(node);
+                case 216 /* ForOfStatement */:
+                    return visitForOfStatement(node, /*outermostLabeledStatement*/ undefined);
+                case 214 /* ForStatement */:
+                    return visitForStatement(node);
+                case 190 /* VoidExpression */:
+                    return visitVoidExpression(node);
+                case 152 /* Constructor */:
+                    return visitConstructorDeclaration(node);
+                case 151 /* MethodDeclaration */:
+                    return visitMethodDeclaration(node);
+                case 153 /* GetAccessor */:
+                    return visitGetAccessorDeclaration(node);
+                case 154 /* SetAccessor */:
+                    return visitSetAccessorDeclaration(node);
+                case 228 /* FunctionDeclaration */:
+                    return visitFunctionDeclaration(node);
+                case 186 /* FunctionExpression */:
+                    return visitFunctionExpression(node);
+                case 187 /* ArrowFunction */:
+                    return visitArrowFunction(node);
+                case 146 /* Parameter */:
+                    return visitParameter(node);
+                case 210 /* ExpressionStatement */:
+                    return visitExpressionStatement(node);
+                case 185 /* ParenthesizedExpression */:
+                    return visitParenthesizedExpression(node, noDestructuringValue);
+                default:
+                    return ts.visitEachChild(node, visitor, context);
+            }
+        }
+        function visitAwaitExpression(node) {
+            if (enclosingFunctionFlags & 2 /* Async */ && enclosingFunctionFlags & 1 /* Generator */) {
+                return ts.setOriginalNode(ts.setTextRange(ts.createYield(createAwaitHelper(context, ts.visitNode(node.expression, visitor, ts.isExpression))), 
+                /*location*/ node), node);
+            }
+            return ts.visitEachChild(node, visitor, context);
         }
-        function createExternalModuleExport(exportName) {
-            return ts.createExportDeclaration(
-            /*decorators*/ undefined, 
-            /*modifiers*/ undefined, ts.createNamedExports([
-                ts.createExportSpecifier(exportName)
-            ]));
+        function visitYieldExpression(node) {
+            if (enclosingFunctionFlags & 2 /* Async */ && enclosingFunctionFlags & 1 /* Generator */ && node.asteriskToken) {
+                var expression = ts.visitNode(node.expression, visitor, ts.isExpression);
+                return ts.setOriginalNode(ts.setTextRange(ts.createYield(createAwaitHelper(context, ts.updateYield(node, node.asteriskToken, createAsyncDelegatorHelper(context, createAsyncValuesHelper(context, expression, expression), expression)))), node), node);
+            }
+            return ts.visitEachChild(node, visitor, context);
         }
-        function getNamespaceMemberName(name, allowComments, allowSourceMaps) {
-            var qualifiedName = ts.createPropertyAccess(currentNamespaceContainerName, ts.getSynthesizedClone(name), /*location*/ name);
-            var emitFlags;
-            if (!allowComments) {
-                emitFlags |= 49152 /* NoComments */;
+        function visitLabeledStatement(node) {
+            if (enclosingFunctionFlags & 2 /* Async */ && enclosingFunctionFlags & 1 /* Generator */) {
+                var statement = ts.unwrapInnermostStatementOfLabel(node);
+                if (statement.kind === 216 /* ForOfStatement */ && statement.awaitModifier) {
+                    return visitForOfStatement(statement, node);
+                }
+                return ts.restoreEnclosingLabel(ts.visitEachChild(node, visitor, context), node);
             }
-            if (!allowSourceMaps) {
-                emitFlags |= 1536 /* NoSourceMap */;
+            return ts.visitEachChild(node, visitor, context);
+        }
+        function chunkObjectLiteralElements(elements) {
+            var chunkObject;
+            var objects = [];
+            for (var _i = 0, elements_5 = elements; _i < elements_5.length; _i++) {
+                var e = elements_5[_i];
+                if (e.kind === 263 /* SpreadAssignment */) {
+                    if (chunkObject) {
+                        objects.push(ts.createObjectLiteral(chunkObject));
+                        chunkObject = undefined;
+                    }
+                    var target = e.expression;
+                    objects.push(ts.visitNode(target, visitor, ts.isExpression));
+                }
+                else {
+                    if (!chunkObject) {
+                        chunkObject = [];
+                    }
+                    if (e.kind === 261 /* PropertyAssignment */) {
+                        var p = e;
+                        chunkObject.push(ts.createPropertyAssignment(p.name, ts.visitNode(p.initializer, visitor, ts.isExpression)));
+                    }
+                    else {
+                        chunkObject.push(e);
+                    }
+                }
             }
-            if (emitFlags) {
-                ts.setEmitFlags(qualifiedName, emitFlags);
+            if (chunkObject) {
+                objects.push(ts.createObjectLiteral(chunkObject));
             }
-            return qualifiedName;
+            return objects;
         }
-        function getNamespaceMemberNameWithSourceMapsAndWithoutComments(name) {
-            return getNamespaceMemberName(name, /*allowComments*/ false, /*allowSourceMaps*/ true);
+        function visitObjectLiteralExpression(node) {
+            if (node.transformFlags & 1048576 /* ContainsObjectSpread */) {
+                // spread elements emit like so:
+                // non-spread elements are chunked together into object literals, and then all are passed to __assign:
+                //     { a, ...o, b } => __assign({a}, o, {b});
+                // If the first element is a spread element, then the first argument to __assign is {}:
+                //     { ...o, a, b, ...o2 } => __assign({}, o, {a, b}, o2)
+                var objects = chunkObjectLiteralElements(node.properties);
+                if (objects.length && objects[0].kind !== 178 /* ObjectLiteralExpression */) {
+                    objects.unshift(ts.createObjectLiteral());
+                }
+                return createAssignHelper(context, objects);
+            }
+            return ts.visitEachChild(node, visitor, context);
         }
-        /**
-         * Gets the declaration name used inside of a namespace or enum.
-         */
-        function getNamespaceParameterName(node) {
-            var name = ts.getGeneratedNameForNode(node);
-            ts.setSourceMapRange(name, node.name);
-            return name;
+        function visitExpressionStatement(node) {
+            return ts.visitEachChild(node, visitorNoDestructuringValue, context);
         }
-        /**
-         * Gets the expression used to refer to a namespace or enum within the body
-         * of its declaration.
-         */
-        function getNamespaceContainerName(node) {
-            return ts.getGeneratedNameForNode(node);
+        function visitParenthesizedExpression(node, noDestructuringValue) {
+            return ts.visitEachChild(node, noDestructuringValue ? visitorNoDestructuringValue : visitor, context);
         }
         /**
-         * Gets the local name for a declaration for use in expressions.
-         *
-         * A local name will *never* be prefixed with an module or namespace export modifier like
-         * "exports.".
+         * Visits a BinaryExpression that contains a destructuring assignment.
          *
-         * @param node The declaration.
-         * @param noSourceMaps A value indicating whether source maps may not be emitted for the name.
-         * @param allowComments A value indicating whether comments may be emitted for the name.
+         * @param node A BinaryExpression node.
          */
-        function getLocalName(node, noSourceMaps, allowComments) {
-            return getDeclarationName(node, allowComments, !noSourceMaps, 262144 /* LocalName */);
+        function visitBinaryExpression(node, noDestructuringValue) {
+            if (ts.isDestructuringAssignment(node) && node.left.transformFlags & 1048576 /* ContainsObjectRest */) {
+                return ts.flattenDestructuringAssignment(node, visitor, context, 1 /* ObjectRest */, !noDestructuringValue);
+            }
+            else if (node.operatorToken.kind === 26 /* CommaToken */) {
+                return ts.updateBinary(node, ts.visitNode(node.left, visitorNoDestructuringValue, ts.isExpression), ts.visitNode(node.right, noDestructuringValue ? visitorNoDestructuringValue : visitor, ts.isExpression));
+            }
+            return ts.visitEachChild(node, visitor, context);
         }
         /**
-         * Gets the export name for a declaration for use in expressions.
-         *
-         * An export name will *always* be prefixed with an module or namespace export modifier
-         * like "exports." if one is required.
+         * Visits a VariableDeclaration node with a binding pattern.
          *
-         * @param node The declaration.
-         * @param noSourceMaps A value indicating whether source maps may not be emitted for the name.
-         * @param allowComments A value indicating whether comments may be emitted for the name.
+         * @param node A VariableDeclaration node.
          */
-        function getExportName(node, noSourceMaps, allowComments) {
-            if (isNamespaceExport(node)) {
-                return getNamespaceMemberName(getDeclarationName(node), allowComments, !noSourceMaps);
+        function visitVariableDeclaration(node) {
+            // If we are here it is because the name contains a binding pattern with a rest somewhere in it.
+            if (ts.isBindingPattern(node.name) && node.name.transformFlags & 1048576 /* ContainsObjectRest */) {
+                return ts.flattenDestructuringBinding(node, visitor, context, 1 /* ObjectRest */);
             }
-            return getDeclarationName(node, allowComments, !noSourceMaps, 131072 /* ExportName */);
+            return ts.visitEachChild(node, visitor, context);
+        }
+        function visitForStatement(node) {
+            return ts.updateFor(node, ts.visitNode(node.initializer, visitorNoDestructuringValue, ts.isForInitializer), ts.visitNode(node.condition, visitor, ts.isExpression), ts.visitNode(node.incrementor, visitor, ts.isExpression), ts.visitNode(node.statement, visitor, ts.isStatement));
+        }
+        function visitVoidExpression(node) {
+            return ts.visitEachChild(node, visitorNoDestructuringValue, context);
         }
         /**
-         * Gets the name for a declaration for use in declarations.
+         * Visits a ForOfStatement and converts it into a ES2015-compatible ForOfStatement.
          *
-         * @param node The declaration.
-         * @param allowComments A value indicating whether comments may be emitted for the name.
-         * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
-         * @param emitFlags Additional NodeEmitFlags to specify for the name.
+         * @param node A ForOfStatement.
          */
-        function getDeclarationName(node, allowComments, allowSourceMaps, emitFlags) {
-            if (node.name) {
-                var name_32 = ts.getMutableClone(node.name);
-                emitFlags |= ts.getEmitFlags(node.name);
-                if (!allowSourceMaps) {
-                    emitFlags |= 1536 /* NoSourceMap */;
-                }
-                if (!allowComments) {
-                    emitFlags |= 49152 /* NoComments */;
-                }
-                if (emitFlags) {
-                    ts.setEmitFlags(name_32, emitFlags);
-                }
-                return name_32;
+        function visitForOfStatement(node, outermostLabeledStatement) {
+            if (node.initializer.transformFlags & 1048576 /* ContainsObjectRest */) {
+                node = transformForOfStatementWithObjectRest(node);
+            }
+            if (node.awaitModifier) {
+                return transformForAwaitOfStatement(node, outermostLabeledStatement);
             }
             else {
-                return ts.getGeneratedNameForNode(node);
+                return ts.restoreEnclosingLabel(ts.visitEachChild(node, visitor, context), outermostLabeledStatement);
+            }
+        }
+        function transformForOfStatementWithObjectRest(node) {
+            var initializerWithoutParens = ts.skipParentheses(node.initializer);
+            if (ts.isVariableDeclarationList(initializerWithoutParens) || ts.isAssignmentPattern(initializerWithoutParens)) {
+                var bodyLocation = void 0;
+                var statementsLocation = void 0;
+                var temp = ts.createTempVariable(/*recordTempVariable*/ undefined);
+                var statements = [ts.createForOfBindingStatement(initializerWithoutParens, temp)];
+                if (ts.isBlock(node.statement)) {
+                    ts.addRange(statements, node.statement.statements);
+                    bodyLocation = node.statement;
+                    statementsLocation = node.statement.statements;
+                }
+                return ts.updateForOf(node, node.awaitModifier, ts.setTextRange(ts.createVariableDeclarationList([
+                    ts.setTextRange(ts.createVariableDeclaration(temp), node.initializer)
+                ], 1 /* Let */), node.initializer), node.expression, ts.setTextRange(ts.createBlock(ts.setTextRange(ts.createNodeArray(statements), statementsLocation), 
+                /*multiLine*/ true), bodyLocation));
             }
+            return node;
         }
-        function getClassPrototype(node) {
-            return ts.createPropertyAccess(getDeclarationName(node), "prototype");
+        function convertForOfStatementHead(node, boundValue) {
+            var binding = ts.createForOfBindingStatement(node.initializer, boundValue);
+            var bodyLocation;
+            var statementsLocation;
+            var statements = [ts.visitNode(binding, visitor, ts.isStatement)];
+            var statement = ts.visitNode(node.statement, visitor, ts.isStatement);
+            if (ts.isBlock(statement)) {
+                ts.addRange(statements, statement.statements);
+                bodyLocation = statement;
+                statementsLocation = statement.statements;
+            }
+            else {
+                statements.push(statement);
+            }
+            return ts.setEmitFlags(ts.setTextRange(ts.createBlock(ts.setTextRange(ts.createNodeArray(statements), statementsLocation), 
+            /*multiLine*/ true), bodyLocation), 48 /* NoSourceMap */ | 384 /* NoTokenSourceMaps */);
         }
-        function getClassMemberPrefix(node, member) {
-            return ts.hasModifier(member, 32 /* Static */)
-                ? getDeclarationName(node)
-                : getClassPrototype(node);
+        function createDownlevelAwait(expression) {
+            return enclosingFunctionFlags & 1 /* Generator */
+                ? ts.createYield(/*asteriskToken*/ undefined, createAwaitHelper(context, expression))
+                : ts.createAwait(expression);
         }
-        function enableSubstitutionForNonQualifiedEnumMembers() {
-            if ((enabledSubstitutions & 8 /* NonQualifiedEnumMembers */) === 0) {
-                enabledSubstitutions |= 8 /* NonQualifiedEnumMembers */;
-                context.enableSubstitution(69 /* Identifier */);
-            }
+        function transformForAwaitOfStatement(node, outermostLabeledStatement) {
+            var expression = ts.visitNode(node.expression, visitor, ts.isExpression);
+            var iterator = ts.isIdentifier(expression) ? ts.getGeneratedNameForNode(expression) : ts.createTempVariable(/*recordTempVariable*/ undefined);
+            var result = ts.isIdentifier(expression) ? ts.getGeneratedNameForNode(iterator) : ts.createTempVariable(/*recordTempVariable*/ undefined);
+            var errorRecord = ts.createUniqueName("e");
+            var catchVariable = ts.getGeneratedNameForNode(errorRecord);
+            var returnMethod = ts.createTempVariable(/*recordTempVariable*/ undefined);
+            var callValues = createAsyncValuesHelper(context, expression, /*location*/ node.expression);
+            var callNext = ts.createCall(ts.createPropertyAccess(iterator, "next"), /*typeArguments*/ undefined, []);
+            var getDone = ts.createPropertyAccess(result, "done");
+            var getValue = ts.createPropertyAccess(result, "value");
+            var callReturn = ts.createFunctionCall(returnMethod, iterator, []);
+            hoistVariableDeclaration(errorRecord);
+            hoistVariableDeclaration(returnMethod);
+            var forStatement = ts.setEmitFlags(ts.setTextRange(ts.createFor(
+            /*initializer*/ ts.setEmitFlags(ts.setTextRange(ts.createVariableDeclarationList([
+                ts.setTextRange(ts.createVariableDeclaration(iterator, /*type*/ undefined, callValues), node.expression),
+                ts.createVariableDeclaration(result)
+            ]), node.expression), 2097152 /* NoHoisting */), 
+            /*condition*/ ts.createComma(ts.createAssignment(result, createDownlevelAwait(callNext)), ts.createLogicalNot(getDone)), 
+            /*incrementor*/ undefined, 
+            /*statement*/ convertForOfStatementHead(node, createDownlevelAwait(getValue))), 
+            /*location*/ node), 256 /* NoTokenTrailingSourceMaps */);
+            return ts.createTry(ts.createBlock([
+                ts.restoreEnclosingLabel(forStatement, outermostLabeledStatement)
+            ]), ts.createCatchClause(ts.createVariableDeclaration(catchVariable), ts.setEmitFlags(ts.createBlock([
+                ts.createStatement(ts.createAssignment(errorRecord, ts.createObjectLiteral([
+                    ts.createPropertyAssignment("error", catchVariable)
+                ])))
+            ]), 1 /* SingleLine */)), ts.createBlock([
+                ts.createTry(
+                /*tryBlock*/ ts.createBlock([
+                    ts.setEmitFlags(ts.createIf(ts.createLogicalAnd(ts.createLogicalAnd(result, ts.createLogicalNot(getDone)), ts.createAssignment(returnMethod, ts.createPropertyAccess(iterator, "return"))), ts.createStatement(createDownlevelAwait(callReturn))), 1 /* SingleLine */)
+                ]), 
+                /*catchClause*/ undefined, 
+                /*finallyBlock*/ ts.setEmitFlags(ts.createBlock([
+                    ts.setEmitFlags(ts.createIf(errorRecord, ts.createThrow(ts.createPropertyAccess(errorRecord, "error"))), 1 /* SingleLine */)
+                ]), 1 /* SingleLine */))
+            ]));
         }
-        function enableSubstitutionForAsyncMethodsWithSuper() {
-            if ((enabledSubstitutions & 4 /* AsyncMethodsWithSuper */) === 0) {
-                enabledSubstitutions |= 4 /* AsyncMethodsWithSuper */;
-                // We need to enable substitutions for call, property access, and element access
-                // if we need to rewrite super calls.
-                context.enableSubstitution(174 /* CallExpression */);
-                context.enableSubstitution(172 /* PropertyAccessExpression */);
-                context.enableSubstitution(173 /* ElementAccessExpression */);
-                // We need to be notified when entering and exiting declarations that bind super.
-                context.enableEmitNotification(221 /* ClassDeclaration */);
-                context.enableEmitNotification(147 /* MethodDeclaration */);
-                context.enableEmitNotification(149 /* GetAccessor */);
-                context.enableEmitNotification(150 /* SetAccessor */);
-                context.enableEmitNotification(148 /* Constructor */);
+        function visitParameter(node) {
+            if (node.transformFlags & 1048576 /* ContainsObjectRest */) {
+                // Binding patterns are converted into a generated name and are
+                // evaluated inside the function body.
+                return ts.updateParameter(node, 
+                /*decorators*/ undefined, 
+                /*modifiers*/ undefined, node.dotDotDotToken, ts.getGeneratedNameForNode(node), 
+                /*questionToken*/ undefined, 
+                /*type*/ undefined, ts.visitNode(node.initializer, visitor, ts.isExpression));
             }
+            return ts.visitEachChild(node, visitor, context);
         }
-        function enableSubstitutionForClassAliases() {
-            if ((enabledSubstitutions & 1 /* ClassAliases */) === 0) {
-                enabledSubstitutions |= 1 /* ClassAliases */;
-                // We need to enable substitutions for identifiers. This allows us to
-                // substitute class names inside of a class declaration.
-                context.enableSubstitution(69 /* Identifier */);
-                // Keep track of class aliases.
-                classAliases = ts.createMap();
-            }
+        function visitConstructorDeclaration(node) {
+            var savedEnclosingFunctionFlags = enclosingFunctionFlags;
+            enclosingFunctionFlags = 0 /* Normal */;
+            var updated = ts.updateConstructor(node, 
+            /*decorators*/ undefined, node.modifiers, ts.visitParameterList(node.parameters, visitor, context), transformFunctionBody(node));
+            enclosingFunctionFlags = savedEnclosingFunctionFlags;
+            return updated;
         }
-        function enableSubstitutionForNamespaceExports() {
-            if ((enabledSubstitutions & 2 /* NamespaceExports */) === 0) {
-                enabledSubstitutions |= 2 /* NamespaceExports */;
-                // We need to enable substitutions for identifiers and shorthand property assignments. This allows us to
-                // substitute the names of exported members of a namespace.
-                context.enableSubstitution(69 /* Identifier */);
-                context.enableSubstitution(254 /* ShorthandPropertyAssignment */);
-                // We need to be notified when entering and exiting namespaces.
-                context.enableEmitNotification(225 /* ModuleDeclaration */);
+        function visitGetAccessorDeclaration(node) {
+            var savedEnclosingFunctionFlags = enclosingFunctionFlags;
+            enclosingFunctionFlags = 0 /* Normal */;
+            var updated = ts.updateGetAccessor(node, 
+            /*decorators*/ undefined, node.modifiers, ts.visitNode(node.name, visitor, ts.isPropertyName), ts.visitParameterList(node.parameters, visitor, context), 
+            /*type*/ undefined, transformFunctionBody(node));
+            enclosingFunctionFlags = savedEnclosingFunctionFlags;
+            return updated;
+        }
+        function visitSetAccessorDeclaration(node) {
+            var savedEnclosingFunctionFlags = enclosingFunctionFlags;
+            enclosingFunctionFlags = 0 /* Normal */;
+            var updated = ts.updateSetAccessor(node, 
+            /*decorators*/ undefined, node.modifiers, ts.visitNode(node.name, visitor, ts.isPropertyName), ts.visitParameterList(node.parameters, visitor, context), transformFunctionBody(node));
+            enclosingFunctionFlags = savedEnclosingFunctionFlags;
+            return updated;
+        }
+        function visitMethodDeclaration(node) {
+            var savedEnclosingFunctionFlags = enclosingFunctionFlags;
+            enclosingFunctionFlags = ts.getFunctionFlags(node);
+            var updated = ts.updateMethod(node, 
+            /*decorators*/ undefined, enclosingFunctionFlags & 1 /* Generator */
+                ? ts.visitNodes(node.modifiers, visitorNoAsyncModifier, ts.isModifier)
+                : node.modifiers, enclosingFunctionFlags & 2 /* Async */
+                ? undefined
+                : node.asteriskToken, ts.visitNode(node.name, visitor, ts.isPropertyName), ts.visitNode(/*questionToken*/ undefined, visitor, ts.isToken), 
+            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
+            /*type*/ undefined, enclosingFunctionFlags & 2 /* Async */ && enclosingFunctionFlags & 1 /* Generator */
+                ? transformAsyncGeneratorFunctionBody(node)
+                : transformFunctionBody(node));
+            enclosingFunctionFlags = savedEnclosingFunctionFlags;
+            return updated;
+        }
+        function visitFunctionDeclaration(node) {
+            var savedEnclosingFunctionFlags = enclosingFunctionFlags;
+            enclosingFunctionFlags = ts.getFunctionFlags(node);
+            var updated = ts.updateFunctionDeclaration(node, 
+            /*decorators*/ undefined, enclosingFunctionFlags & 1 /* Generator */
+                ? ts.visitNodes(node.modifiers, visitorNoAsyncModifier, ts.isModifier)
+                : node.modifiers, enclosingFunctionFlags & 2 /* Async */
+                ? undefined
+                : node.asteriskToken, node.name, 
+            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
+            /*type*/ undefined, enclosingFunctionFlags & 2 /* Async */ && enclosingFunctionFlags & 1 /* Generator */
+                ? transformAsyncGeneratorFunctionBody(node)
+                : transformFunctionBody(node));
+            enclosingFunctionFlags = savedEnclosingFunctionFlags;
+            return updated;
+        }
+        function visitArrowFunction(node) {
+            var savedEnclosingFunctionFlags = enclosingFunctionFlags;
+            enclosingFunctionFlags = ts.getFunctionFlags(node);
+            var updated = ts.updateArrowFunction(node, node.modifiers, 
+            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
+            /*type*/ undefined, transformFunctionBody(node));
+            enclosingFunctionFlags = savedEnclosingFunctionFlags;
+            return updated;
+        }
+        function visitFunctionExpression(node) {
+            var savedEnclosingFunctionFlags = enclosingFunctionFlags;
+            enclosingFunctionFlags = ts.getFunctionFlags(node);
+            var updated = ts.updateFunctionExpression(node, enclosingFunctionFlags & 1 /* Generator */
+                ? ts.visitNodes(node.modifiers, visitorNoAsyncModifier, ts.isModifier)
+                : node.modifiers, enclosingFunctionFlags & 2 /* Async */
+                ? undefined
+                : node.asteriskToken, node.name, 
+            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
+            /*type*/ undefined, enclosingFunctionFlags & 2 /* Async */ && enclosingFunctionFlags & 1 /* Generator */
+                ? transformAsyncGeneratorFunctionBody(node)
+                : transformFunctionBody(node));
+            enclosingFunctionFlags = savedEnclosingFunctionFlags;
+            return updated;
+        }
+        function transformAsyncGeneratorFunctionBody(node) {
+            resumeLexicalEnvironment();
+            var statements = [];
+            var statementOffset = ts.addPrologue(statements, node.body.statements, /*ensureUseStrict*/ false, visitor);
+            appendObjectRestAssignmentsIfNeeded(statements, node);
+            statements.push(ts.createReturn(createAsyncGeneratorHelper(context, ts.createFunctionExpression(
+            /*modifiers*/ undefined, ts.createToken(39 /* AsteriskToken */), node.name && ts.getGeneratedNameForNode(node.name), 
+            /*typeParameters*/ undefined, 
+            /*parameters*/ [], 
+            /*type*/ undefined, ts.updateBlock(node.body, ts.visitLexicalEnvironment(node.body.statements, visitor, context, statementOffset))))));
+            ts.addRange(statements, endLexicalEnvironment());
+            var block = ts.updateBlock(node.body, statements);
+            // Minor optimization, emit `_super` helper to capture `super` access in an arrow.
+            // This step isn't needed if we eventually transform this to ES5.
+            if (languageVersion >= 2 /* ES2015 */) {
+                if (resolver.getNodeCheckFlags(node) & 4096 /* AsyncMethodWithSuperBinding */) {
+                    enableSubstitutionForAsyncMethodsWithSuper();
+                    ts.addEmitHelper(block, ts.advancedAsyncSuperHelper);
+                }
+                else if (resolver.getNodeCheckFlags(node) & 2048 /* AsyncMethodWithSuper */) {
+                    enableSubstitutionForAsyncMethodsWithSuper();
+                    ts.addEmitHelper(block, ts.asyncSuperHelper);
+                }
             }
+            return block;
         }
-        function isSuperContainer(node) {
-            var kind = node.kind;
-            return kind === 221 /* ClassDeclaration */
-                || kind === 148 /* Constructor */
-                || kind === 147 /* MethodDeclaration */
-                || kind === 149 /* GetAccessor */
-                || kind === 150 /* SetAccessor */;
+        function transformFunctionBody(node) {
+            resumeLexicalEnvironment();
+            var statementOffset = 0;
+            var statements = [];
+            var body = ts.visitNode(node.body, visitor, ts.isConciseBody);
+            if (ts.isBlock(body)) {
+                statementOffset = ts.addPrologue(statements, body.statements, /*ensureUseStrict*/ false, visitor);
+            }
+            ts.addRange(statements, appendObjectRestAssignmentsIfNeeded(/*statements*/ undefined, node));
+            var trailingStatements = endLexicalEnvironment();
+            if (statementOffset > 0 || ts.some(statements) || ts.some(trailingStatements)) {
+                var block = ts.convertToFunctionBody(body, /*multiLine*/ true);
+                ts.addRange(statements, block.statements.slice(statementOffset));
+                ts.addRange(statements, trailingStatements);
+                return ts.updateBlock(block, ts.setTextRange(ts.createNodeArray(statements), block.statements));
+            }
+            return body;
         }
-        function isTransformedModuleDeclaration(node) {
-            return ts.getOriginalNode(node).kind === 225 /* ModuleDeclaration */;
+        function appendObjectRestAssignmentsIfNeeded(statements, node) {
+            for (var _i = 0, _a = node.parameters; _i < _a.length; _i++) {
+                var parameter = _a[_i];
+                if (parameter.transformFlags & 1048576 /* ContainsObjectRest */) {
+                    var temp = ts.getGeneratedNameForNode(parameter);
+                    var declarations = ts.flattenDestructuringBinding(parameter, visitor, context, 1 /* ObjectRest */, temp, 
+                    /*doNotRecordTempVariablesInLine*/ false, 
+                    /*skipInitializer*/ true);
+                    if (ts.some(declarations)) {
+                        var statement = ts.createVariableStatement(
+                        /*modifiers*/ undefined, ts.createVariableDeclarationList(declarations));
+                        ts.setEmitFlags(statement, 1048576 /* CustomPrologue */);
+                        statements = ts.append(statements, statement);
+                    }
+                }
+            }
+            return statements;
         }
-        function isTransformedEnumDeclaration(node) {
-            return ts.getOriginalNode(node).kind === 224 /* EnumDeclaration */;
+        function enableSubstitutionForAsyncMethodsWithSuper() {
+            if ((enabledSubstitutions & 1 /* AsyncMethodsWithSuper */) === 0) {
+                enabledSubstitutions |= 1 /* AsyncMethodsWithSuper */;
+                // We need to enable substitutions for call, property access, and element access
+                // if we need to rewrite super calls.
+                context.enableSubstitution(181 /* CallExpression */);
+                context.enableSubstitution(179 /* PropertyAccessExpression */);
+                context.enableSubstitution(180 /* ElementAccessExpression */);
+                // We need to be notified when entering and exiting declarations that bind super.
+                context.enableEmitNotification(229 /* ClassDeclaration */);
+                context.enableEmitNotification(151 /* MethodDeclaration */);
+                context.enableEmitNotification(153 /* GetAccessor */);
+                context.enableEmitNotification(154 /* SetAccessor */);
+                context.enableEmitNotification(152 /* Constructor */);
+            }
         }
         /**
-         * Hook for node emit.
+         * Called by the printer just before a node is printed.
          *
-         * @param node The node to emit.
-         * @param emit A callback used to emit the node in the printer.
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to be printed.
+         * @param emitCallback The callback used to emit the node.
          */
-        function onEmitNode(emitContext, node, emitCallback) {
-            var savedApplicableSubstitutions = applicableSubstitutions;
-            var savedCurrentSuperContainer = currentSuperContainer;
+        function onEmitNode(hint, node, emitCallback) {
             // If we need to support substitutions for `super` in an async method,
             // we should track it here.
-            if (enabledSubstitutions & 4 /* AsyncMethodsWithSuper */ && isSuperContainer(node)) {
-                currentSuperContainer = node;
-            }
-            if (enabledSubstitutions & 2 /* NamespaceExports */ && isTransformedModuleDeclaration(node)) {
-                applicableSubstitutions |= 2 /* NamespaceExports */;
-            }
-            if (enabledSubstitutions & 8 /* NonQualifiedEnumMembers */ && isTransformedEnumDeclaration(node)) {
-                applicableSubstitutions |= 8 /* NonQualifiedEnumMembers */;
+            if (enabledSubstitutions & 1 /* AsyncMethodsWithSuper */ && isSuperContainer(node)) {
+                var superContainerFlags = resolver.getNodeCheckFlags(node) & (2048 /* AsyncMethodWithSuper */ | 4096 /* AsyncMethodWithSuperBinding */);
+                if (superContainerFlags !== enclosingSuperContainerFlags) {
+                    var savedEnclosingSuperContainerFlags = enclosingSuperContainerFlags;
+                    enclosingSuperContainerFlags = superContainerFlags;
+                    previousOnEmitNode(hint, node, emitCallback);
+                    enclosingSuperContainerFlags = savedEnclosingSuperContainerFlags;
+                    return;
+                }
             }
-            previousOnEmitNode(emitContext, node, emitCallback);
-            applicableSubstitutions = savedApplicableSubstitutions;
-            currentSuperContainer = savedCurrentSuperContainer;
+            previousOnEmitNode(hint, node, emitCallback);
         }
         /**
          * Hooks node substitutions.
          *
+         * @param hint The context for the emitter.
          * @param node The node to substitute.
-         * @param isExpression A value indicating whether the node is to be used in an expression
-         *                     position.
          */
-        function onSubstituteNode(emitContext, node) {
-            node = previousOnSubstituteNode(emitContext, node);
-            if (emitContext === 1 /* Expression */) {
+        function onSubstituteNode(hint, node) {
+            node = previousOnSubstituteNode(hint, node);
+            if (hint === 1 /* Expression */ && enclosingSuperContainerFlags) {
                 return substituteExpression(node);
             }
-            else if (ts.isShorthandPropertyAssignment(node)) {
-                return substituteShorthandPropertyAssignment(node);
-            }
-            return node;
-        }
-        function substituteShorthandPropertyAssignment(node) {
-            if (enabledSubstitutions & 2 /* NamespaceExports */) {
-                var name_33 = node.name;
-                var exportedName = trySubstituteNamespaceExportedName(name_33);
-                if (exportedName) {
-                    // A shorthand property with an assignment initializer is probably part of a
-                    // destructuring assignment
-                    if (node.objectAssignmentInitializer) {
-                        var initializer = ts.createAssignment(exportedName, node.objectAssignmentInitializer);
-                        return ts.createPropertyAssignment(name_33, initializer, /*location*/ node);
-                    }
-                    return ts.createPropertyAssignment(name_33, exportedName, /*location*/ node);
-                }
-            }
             return node;
         }
         function substituteExpression(node) {
             switch (node.kind) {
-                case 69 /* Identifier */:
-                    return substituteExpressionIdentifier(node);
-                case 172 /* PropertyAccessExpression */:
+                case 179 /* PropertyAccessExpression */:
                     return substitutePropertyAccessExpression(node);
-                case 173 /* ElementAccessExpression */:
+                case 180 /* ElementAccessExpression */:
                     return substituteElementAccessExpression(node);
-                case 174 /* CallExpression */:
-                    if (enabledSubstitutions & 4 /* AsyncMethodsWithSuper */) {
-                        return substituteCallExpression(node);
-                    }
-                    break;
+                case 181 /* CallExpression */:
+                    return substituteCallExpression(node);
             }
             return node;
         }
-        function substituteExpressionIdentifier(node) {
-            return trySubstituteClassAlias(node)
-                || trySubstituteNamespaceExportedName(node)
-                || node;
-        }
-        function trySubstituteClassAlias(node) {
-            if (enabledSubstitutions & 1 /* ClassAliases */) {
-                if (resolver.getNodeCheckFlags(node) & 16777216 /* ConstructorReferenceInClass */) {
-                    // Due to the emit for class decorators, any reference to the class from inside of the class body
-                    // must instead be rewritten to point to a temporary variable to avoid issues with the double-bind
-                    // behavior of class names in ES6.
-                    // Also, when emitting statics for class expressions, we must substitute a class alias for
-                    // constructor references in static property initializers.
-                    var declaration = resolver.getReferencedValueDeclaration(node);
-                    if (declaration) {
-                        var classAlias = classAliases[declaration.id];
-                        if (classAlias) {
-                            var clone_4 = ts.getSynthesizedClone(classAlias);
-                            ts.setSourceMapRange(clone_4, node);
-                            ts.setCommentRange(clone_4, node);
-                            return clone_4;
-                        }
-                    }
-                }
+        function substitutePropertyAccessExpression(node) {
+            if (node.expression.kind === 97 /* SuperKeyword */) {
+                return createSuperAccessInAsyncMethod(ts.createLiteral(node.name.text), node);
             }
-            return undefined;
+            return node;
         }
-        function trySubstituteNamespaceExportedName(node) {
-            // If this is explicitly a local name, do not substitute.
-            if (enabledSubstitutions & applicableSubstitutions && (ts.getEmitFlags(node) & 262144 /* LocalName */) === 0) {
-                // If we are nested within a namespace declaration, we may need to qualifiy
-                // an identifier that is exported from a merged namespace.
-                var container = resolver.getReferencedExportContainer(node, /*prefixLocals*/ false);
-                if (container) {
-                    var substitute = (applicableSubstitutions & 2 /* NamespaceExports */ && container.kind === 225 /* ModuleDeclaration */) ||
-                        (applicableSubstitutions & 8 /* NonQualifiedEnumMembers */ && container.kind === 224 /* EnumDeclaration */);
-                    if (substitute) {
-                        return ts.createPropertyAccess(ts.getGeneratedNameForNode(container), node, /*location*/ node);
-                    }
-                }
+        function substituteElementAccessExpression(node) {
+            if (node.expression.kind === 97 /* SuperKeyword */) {
+                return createSuperAccessInAsyncMethod(node.argumentExpression, node);
             }
-            return undefined;
+            return node;
         }
         function substituteCallExpression(node) {
             var expression = node.expression;
             if (ts.isSuperProperty(expression)) {
-                var flags = getSuperContainerAsyncMethodFlags();
-                if (flags) {
-                    var argumentExpression = ts.isPropertyAccessExpression(expression)
-                        ? substitutePropertyAccessExpression(expression)
-                        : substituteElementAccessExpression(expression);
-                    return ts.createCall(ts.createPropertyAccess(argumentExpression, "call"), 
-                    /*typeArguments*/ undefined, [
-                        ts.createThis()
-                    ].concat(node.arguments));
-                }
-            }
-            return node;
-        }
-        function substitutePropertyAccessExpression(node) {
-            if (enabledSubstitutions & 4 /* AsyncMethodsWithSuper */ && node.expression.kind === 95 /* SuperKeyword */) {
-                var flags = getSuperContainerAsyncMethodFlags();
-                if (flags) {
-                    return createSuperAccessInAsyncMethod(ts.createLiteral(node.name.text), flags, node);
-                }
-            }
-            return substituteConstantValue(node);
-        }
-        function substituteElementAccessExpression(node) {
-            if (enabledSubstitutions & 4 /* AsyncMethodsWithSuper */ && node.expression.kind === 95 /* SuperKeyword */) {
-                var flags = getSuperContainerAsyncMethodFlags();
-                if (flags) {
-                    return createSuperAccessInAsyncMethod(node.argumentExpression, flags, node);
-                }
-            }
-            return substituteConstantValue(node);
-        }
-        function substituteConstantValue(node) {
-            var constantValue = tryGetConstEnumValue(node);
-            if (constantValue !== undefined) {
-                var substitute = ts.createLiteral(constantValue);
-                ts.setSourceMapRange(substitute, node);
-                ts.setCommentRange(substitute, node);
-                if (!compilerOptions.removeComments) {
-                    var propertyName = ts.isPropertyAccessExpression(node)
-                        ? ts.declarationNameToString(node.name)
-                        : ts.getTextOfNode(node.argumentExpression);
-                    substitute.trailingComment = " " + propertyName + " ";
-                }
-                ts.setConstantValue(node, constantValue);
-                return substitute;
+                var argumentExpression = ts.isPropertyAccessExpression(expression)
+                    ? substitutePropertyAccessExpression(expression)
+                    : substituteElementAccessExpression(expression);
+                return ts.createCall(ts.createPropertyAccess(argumentExpression, "call"), 
+                /*typeArguments*/ undefined, [
+                    ts.createThis()
+                ].concat(node.arguments));
             }
             return node;
         }
-        function tryGetConstEnumValue(node) {
-            if (compilerOptions.isolatedModules) {
-                return undefined;
-            }
-            return ts.isPropertyAccessExpression(node) || ts.isElementAccessExpression(node)
-                ? resolver.getConstantValue(node)
-                : undefined;
+        function isSuperContainer(node) {
+            var kind = node.kind;
+            return kind === 229 /* ClassDeclaration */
+                || kind === 152 /* Constructor */
+                || kind === 151 /* MethodDeclaration */
+                || kind === 153 /* GetAccessor */
+                || kind === 154 /* SetAccessor */;
         }
-        function createSuperAccessInAsyncMethod(argumentExpression, flags, location) {
-            if (flags & 4096 /* AsyncMethodWithSuperBinding */) {
-                return ts.createPropertyAccess(ts.createCall(ts.createIdentifier("_super"), 
-                /*typeArguments*/ undefined, [argumentExpression]), "value", location);
+        function createSuperAccessInAsyncMethod(argumentExpression, location) {
+            if (enclosingSuperContainerFlags & 4096 /* AsyncMethodWithSuperBinding */) {
+                return ts.setTextRange(ts.createPropertyAccess(ts.createCall(ts.createIdentifier("_super"), 
+                /*typeArguments*/ undefined, [argumentExpression]), "value"), location);
             }
             else {
-                return ts.createCall(ts.createIdentifier("_super"), 
-                /*typeArguments*/ undefined, [argumentExpression], location);
+                return ts.setTextRange(ts.createCall(ts.createIdentifier("_super"), 
+                /*typeArguments*/ undefined, [argumentExpression]), location);
             }
         }
-        function getSuperContainerAsyncMethodFlags() {
-            return currentSuperContainer !== undefined
-                && resolver.getNodeCheckFlags(currentSuperContainer) & (2048 /* AsyncMethodWithSuper */ | 4096 /* AsyncMethodWithSuperBinding */);
+    }
+    ts.transformESNext = transformESNext;
+    var assignHelper = {
+        name: "typescript:assign",
+        scoped: false,
+        priority: 1,
+        text: "\n            var __assign = (this && this.__assign) || Object.assign || function(t) {\n                for (var s, i = 1, n = arguments.length; i < n; i++) {\n                    s = arguments[i];\n                    for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))\n                        t[p] = s[p];\n                }\n                return t;\n            };"
+    };
+    function createAssignHelper(context, attributesSegments) {
+        if (context.getCompilerOptions().target >= 2 /* ES2015 */) {
+            return ts.createCall(ts.createPropertyAccess(ts.createIdentifier("Object"), "assign"), 
+            /*typeArguments*/ undefined, attributesSegments);
         }
+        context.requestEmitHelper(assignHelper);
+        return ts.createCall(ts.getHelperName("__assign"), 
+        /*typeArguments*/ undefined, attributesSegments);
+    }
+    ts.createAssignHelper = createAssignHelper;
+    var awaitHelper = {
+        name: "typescript:await",
+        scoped: false,
+        text: "\n            var __await = (this && this.__await) || function (v) { return this instanceof __await ? (this.v = v, this) : new __await(v); }\n        "
+    };
+    function createAwaitHelper(context, expression) {
+        context.requestEmitHelper(awaitHelper);
+        return ts.createCall(ts.getHelperName("__await"), /*typeArguments*/ undefined, [expression]);
+    }
+    var asyncGeneratorHelper = {
+        name: "typescript:asyncGenerator",
+        scoped: false,
+        text: "\n            var __asyncGenerator = (this && this.__asyncGenerator) || function (thisArg, _arguments, generator) {\n                if (!Symbol.asyncIterator) throw new TypeError(\"Symbol.asyncIterator is not defined.\");\n                var g = generator.apply(thisArg, _arguments || []), i, q = [];\n                return i = {}, verb(\"next\"), verb(\"throw\"), verb(\"return\"), i[Symbol.asyncIterator] = function () { return this; }, i;\n                function verb(n) { if (g[n]) i[n] = function (v) { return new Promise(function (a, b) { q.push([n, v, a, b]) > 1 || resume(n, v); }); }; }\n                function resume(n, v) { try { step(g[n](v)); } catch (e) { settle(q[0][3], e); } }\n                function step(r) { r.value instanceof __await ? Promise.resolve(r.value.v).then(fulfill, reject) : settle(q[0][2], r);  }\n                function fulfill(value) { resume(\"next\", value); }\n                function reject(value) { resume(\"throw\", value); }\n                function settle(f, v) { if (f(v), q.shift(), q.length) resume(q[0][0], q[0][1]); }\n            };\n        "
+    };
+    function createAsyncGeneratorHelper(context, generatorFunc) {
+        context.requestEmitHelper(awaitHelper);
+        context.requestEmitHelper(asyncGeneratorHelper);
+        // Mark this node as originally an async function
+        (generatorFunc.emitNode || (generatorFunc.emitNode = {})).flags |= 262144 /* AsyncFunctionBody */;
+        return ts.createCall(ts.getHelperName("__asyncGenerator"), 
+        /*typeArguments*/ undefined, [
+            ts.createThis(),
+            ts.createIdentifier("arguments"),
+            generatorFunc
+        ]);
+    }
+    var asyncDelegator = {
+        name: "typescript:asyncDelegator",
+        scoped: false,
+        text: "\n            var __asyncDelegator = (this && this.__asyncDelegator) || function (o) {\n                var i, p;\n                return i = {}, verb(\"next\"), verb(\"throw\", function (e) { throw e; }), verb(\"return\"), i[Symbol.iterator] = function () { return this; }, i;\n                function verb(n, f) { if (o[n]) i[n] = function (v) { return (p = !p) ? { value: __await(o[n](v)), done: n === \"return\" } : f ? f(v) : v; }; }\n            };\n        "
+    };
+    function createAsyncDelegatorHelper(context, expression, location) {
+        context.requestEmitHelper(awaitHelper);
+        context.requestEmitHelper(asyncDelegator);
+        return ts.setTextRange(ts.createCall(ts.getHelperName("__asyncDelegator"), 
+        /*typeArguments*/ undefined, [expression]), location);
+    }
+    var asyncValues = {
+        name: "typescript:asyncValues",
+        scoped: false,
+        text: "\n            var __asyncValues = (this && this.__asyncIterator) || function (o) {\n                if (!Symbol.asyncIterator) throw new TypeError(\"Symbol.asyncIterator is not defined.\");\n                var m = o[Symbol.asyncIterator];\n                return m ? m.call(o) : typeof __values === \"function\" ? __values(o) : o[Symbol.iterator]();\n            };\n        "
+    };
+    function createAsyncValuesHelper(context, expression, location) {
+        context.requestEmitHelper(asyncValues);
+        return ts.setTextRange(ts.createCall(ts.getHelperName("__asyncValues"), 
+        /*typeArguments*/ undefined, [expression]), location);
     }
-    ts.transformTypeScript = transformTypeScript;
 })(ts || (ts = {}));
 /// <reference path="../factory.ts" />
 /// <reference path="../visitor.ts" />
+/// <reference path="./esnext.ts" />
 /*@internal*/
 var ts;
 (function (ts) {
-    var entities = createEntitiesMap();
     function transformJsx(context) {
         var compilerOptions = context.getCompilerOptions();
-        var currentSourceFile;
         return transformSourceFile;
         /**
          * Transform JSX-specific syntax in a SourceFile.
@@ -48058,47 +58100,42 @@ var ts;
          * @param node A SourceFile node.
          */
         function transformSourceFile(node) {
-            if (ts.isDeclarationFile(node)) {
+            if (node.isDeclarationFile) {
                 return node;
             }
-            currentSourceFile = node;
-            node = ts.visitEachChild(node, visitor, context);
-            currentSourceFile = undefined;
-            return node;
+            var visited = ts.visitEachChild(node, visitor, context);
+            ts.addEmitHelpers(visited, context.readEmitHelpers());
+            return visited;
         }
         function visitor(node) {
-            if (node.transformFlags & 4 /* Jsx */) {
+            if (node.transformFlags & 4 /* ContainsJsx */) {
                 return visitorWorker(node);
             }
-            else if (node.transformFlags & 8 /* ContainsJsx */) {
-                return ts.visitEachChild(node, visitor, context);
-            }
             else {
                 return node;
             }
         }
         function visitorWorker(node) {
             switch (node.kind) {
-                case 241 /* JsxElement */:
+                case 249 /* JsxElement */:
                     return visitJsxElement(node, /*isChild*/ false);
-                case 242 /* JsxSelfClosingElement */:
+                case 250 /* JsxSelfClosingElement */:
                     return visitJsxSelfClosingElement(node, /*isChild*/ false);
-                case 248 /* JsxExpression */:
+                case 256 /* JsxExpression */:
                     return visitJsxExpression(node);
                 default:
-                    ts.Debug.failBadSyntaxKind(node);
-                    return undefined;
+                    return ts.visitEachChild(node, visitor, context);
             }
         }
         function transformJsxChildToExpression(node) {
             switch (node.kind) {
-                case 244 /* JsxText */:
+                case 10 /* JsxText */:
                     return visitJsxText(node);
-                case 248 /* JsxExpression */:
+                case 256 /* JsxExpression */:
                     return visitJsxExpression(node);
-                case 241 /* JsxElement */:
+                case 249 /* JsxElement */:
                     return visitJsxElement(node, /*isChild*/ true);
-                case 242 /* JsxSelfClosingElement */:
+                case 250 /* JsxSelfClosingElement */:
                     return visitJsxSelfClosingElement(node, /*isChild*/ true);
                 default:
                     ts.Debug.failBadSyntaxKind(node);
@@ -48114,7 +58151,7 @@ var ts;
         function visitJsxOpeningLikeElement(node, children, isChild, location) {
             var tagName = getTagName(node);
             var objectProperties;
-            var attrs = node.attributes;
+            var attrs = node.attributes.properties;
             if (attrs.length === 0) {
                 // When there are no attributes, React wants "null"
                 objectProperties = ts.createNull();
@@ -48132,10 +58169,12 @@ var ts;
                 }
                 // Either emit one big object literal (no spread attribs), or
                 // a call to the __assign helper.
-                objectProperties = ts.singleOrUndefined(segments)
-                    || ts.createAssignHelper(currentSourceFile.externalHelpersModuleName, segments);
+                objectProperties = ts.singleOrUndefined(segments);
+                if (!objectProperties) {
+                    objectProperties = ts.createAssignHelper(context, segments);
+                }
             }
-            var element = ts.createReactCreateElement(compilerOptions.reactNamespace, tagName, objectProperties, ts.filter(ts.map(children, transformJsxChildToExpression), ts.isDefined), node, location);
+            var element = ts.createExpressionForJsxElement(context.getEmitResolver().getJsxFactoryEntity(), compilerOptions.reactNamespace, tagName, objectProperties, ts.filter(ts.map(children, transformJsxChildToExpression), ts.isDefined), node, location);
             if (isChild) {
                 ts.startOnNewLine(element);
             }
@@ -48151,13 +58190,16 @@ var ts;
         }
         function transformJsxAttributeInitializer(node) {
             if (node === undefined) {
-                return ts.createLiteral(true);
+                return ts.createTrue();
             }
             else if (node.kind === 9 /* StringLiteral */) {
                 var decoded = tryDecodeEntities(node.text);
-                return decoded ? ts.createLiteral(decoded, /*location*/ node) : node;
+                return decoded ? ts.setTextRange(ts.createLiteral(decoded), node) : node;
             }
-            else if (node.kind === 248 /* JsxExpression */) {
+            else if (node.kind === 256 /* JsxExpression */) {
+                if (node.expression === undefined) {
+                    return ts.createTrue();
+                }
                 return visitJsxExpression(node);
             }
             else {
@@ -48165,54 +58207,61 @@ var ts;
             }
         }
         function visitJsxText(node) {
-            var text = ts.getTextOfNode(node, /*includeTrivia*/ true);
-            var parts;
+            var fixed = fixupWhitespaceAndDecodeEntities(ts.getTextOfNode(node, /*includeTrivia*/ true));
+            return fixed === undefined ? undefined : ts.createLiteral(fixed);
+        }
+        /**
+         * JSX trims whitespace at the end and beginning of lines, except that the
+         * start/end of a tag is considered a start/end of a line only if that line is
+         * on the same line as the closing tag. See examples in
+         * tests/cases/conformance/jsx/tsxReactEmitWhitespace.tsx
+         * See also https://www.w3.org/TR/html4/struct/text.html#h-9.1 and https://www.w3.org/TR/CSS2/text.html#white-space-model
+         *
+         * An equivalent algorithm would be:
+         * - If there is only one line, return it.
+         * - If there is only whitespace (but multiple lines), return `undefined`.
+         * - Split the text into lines.
+         * - 'trimRight' the first line, 'trimLeft' the last line, 'trim' middle lines.
+         * - Decode entities on each line (individually).
+         * - Remove empty lines and join the rest with " ".
+         */
+        function fixupWhitespaceAndDecodeEntities(text) {
+            var acc;
+            // First non-whitespace character on this line.
             var firstNonWhitespace = 0;
+            // Last non-whitespace character on this line.
             var lastNonWhitespace = -1;
-            // JSX trims whitespace at the end and beginning of lines, except that the
-            // start/end of a tag is considered a start/end of a line only if that line is
-            // on the same line as the closing tag. See examples in
-            // tests/cases/conformance/jsx/tsxReactEmitWhitespace.tsx
+            // These initial values are special because the first line is:
+            // firstNonWhitespace = 0 to indicate that we want leading whitsepace,
+            // but lastNonWhitespace = -1 as a special flag to indicate that we *don't* include the line if it's all whitespace.
             for (var i = 0; i < text.length; i++) {
                 var c = text.charCodeAt(i);
                 if (ts.isLineBreak(c)) {
-                    if (firstNonWhitespace !== -1 && (lastNonWhitespace - firstNonWhitespace + 1 > 0)) {
-                        var part = text.substr(firstNonWhitespace, lastNonWhitespace - firstNonWhitespace + 1);
-                        if (!parts) {
-                            parts = [];
-                        }
-                        // We do not escape the string here as that is handled by the printer
-                        // when it emits the literal. We do, however, need to decode JSX entities.
-                        parts.push(ts.createLiteral(decodeEntities(part)));
+                    // If we've seen any non-whitespace characters on this line, add the 'trim' of the line.
+                    // (lastNonWhitespace === -1 is a special flag to detect whether the first line is all whitespace.)
+                    if (firstNonWhitespace !== -1 && lastNonWhitespace !== -1) {
+                        acc = addLineOfJsxText(acc, text.substr(firstNonWhitespace, lastNonWhitespace - firstNonWhitespace + 1));
                     }
+                    // Reset firstNonWhitespace for the next line.
+                    // Don't bother to reset lastNonWhitespace because we ignore it if firstNonWhitespace = -1.
                     firstNonWhitespace = -1;
                 }
-                else if (!ts.isWhiteSpace(c)) {
+                else if (!ts.isWhiteSpaceSingleLine(c)) {
                     lastNonWhitespace = i;
                     if (firstNonWhitespace === -1) {
                         firstNonWhitespace = i;
                     }
                 }
             }
-            if (firstNonWhitespace !== -1) {
-                var part = text.substr(firstNonWhitespace);
-                if (!parts) {
-                    parts = [];
-                }
-                // We do not escape the string here as that is handled by the printer
-                // when it emits the literal. We do, however, need to decode JSX entities.
-                parts.push(ts.createLiteral(decodeEntities(part)));
-            }
-            if (parts) {
-                return ts.reduceLeft(parts, aggregateJsxTextParts);
-            }
-            return undefined;
+            return firstNonWhitespace !== -1
+                ? addLineOfJsxText(acc, text.substr(firstNonWhitespace))
+                : acc;
         }
-        /**
-         * Aggregates two expressions by interpolating them with a whitespace literal.
-         */
-        function aggregateJsxTextParts(left, right) {
-            return ts.createAdd(ts.createAdd(left, ts.createLiteral(" ")), right);
+        function addLineOfJsxText(acc, trimmedLine) {
+            // We do not escape the string here as that is handled by the printer
+            // when it emits the literal. We do, however, need to decode JSX entities.
+            var decoded = decodeEntities(trimmedLine);
+            return acc === undefined ? decoded : acc + " " + decoded;
         }
         /**
          * Replace entities like "&nbsp;", "&#123;", and "&#xDEADBEEF;" with the characters they encode.
@@ -48227,7 +58276,7 @@ var ts;
                     return String.fromCharCode(parseInt(hex, 16));
                 }
                 else {
-                    var ch = entities[word];
+                    var ch = entities.get(word);
                     // If this is not a valid entity, then just use `match` (replace it with itself, i.e. don't replace)
                     return ch ? String.fromCharCode(ch) : match;
                 }
@@ -48239,16 +58288,16 @@ var ts;
             return decoded === text ? undefined : decoded;
         }
         function getTagName(node) {
-            if (node.kind === 241 /* JsxElement */) {
+            if (node.kind === 249 /* JsxElement */) {
                 return getTagName(node.openingElement);
             }
             else {
-                var name_34 = node.tagName;
-                if (ts.isIdentifier(name_34) && ts.isIntrinsicJsxName(name_34.text)) {
-                    return ts.createLiteral(name_34.text);
+                var name_50 = node.tagName;
+                if (ts.isIdentifier(name_50) && ts.isIntrinsicJsxName(name_50.text)) {
+                    return ts.createLiteral(name_50.text);
                 }
                 else {
-                    return ts.createExpressionFromEntityName(name_34);
+                    return ts.createExpressionFromEntityName(name_50);
                 }
             }
         }
@@ -48271,353 +58320,344 @@ var ts;
         }
     }
     ts.transformJsx = transformJsx;
-    function createEntitiesMap() {
-        return ts.createMap({
-            "quot": 0x0022,
-            "amp": 0x0026,
-            "apos": 0x0027,
-            "lt": 0x003C,
-            "gt": 0x003E,
-            "nbsp": 0x00A0,
-            "iexcl": 0x00A1,
-            "cent": 0x00A2,
-            "pound": 0x00A3,
-            "curren": 0x00A4,
-            "yen": 0x00A5,
-            "brvbar": 0x00A6,
-            "sect": 0x00A7,
-            "uml": 0x00A8,
-            "copy": 0x00A9,
-            "ordf": 0x00AA,
-            "laquo": 0x00AB,
-            "not": 0x00AC,
-            "shy": 0x00AD,
-            "reg": 0x00AE,
-            "macr": 0x00AF,
-            "deg": 0x00B0,
-            "plusmn": 0x00B1,
-            "sup2": 0x00B2,
-            "sup3": 0x00B3,
-            "acute": 0x00B4,
-            "micro": 0x00B5,
-            "para": 0x00B6,
-            "middot": 0x00B7,
-            "cedil": 0x00B8,
-            "sup1": 0x00B9,
-            "ordm": 0x00BA,
-            "raquo": 0x00BB,
-            "frac14": 0x00BC,
-            "frac12": 0x00BD,
-            "frac34": 0x00BE,
-            "iquest": 0x00BF,
-            "Agrave": 0x00C0,
-            "Aacute": 0x00C1,
-            "Acirc": 0x00C2,
-            "Atilde": 0x00C3,
-            "Auml": 0x00C4,
-            "Aring": 0x00C5,
-            "AElig": 0x00C6,
-            "Ccedil": 0x00C7,
-            "Egrave": 0x00C8,
-            "Eacute": 0x00C9,
-            "Ecirc": 0x00CA,
-            "Euml": 0x00CB,
-            "Igrave": 0x00CC,
-            "Iacute": 0x00CD,
-            "Icirc": 0x00CE,
-            "Iuml": 0x00CF,
-            "ETH": 0x00D0,
-            "Ntilde": 0x00D1,
-            "Ograve": 0x00D2,
-            "Oacute": 0x00D3,
-            "Ocirc": 0x00D4,
-            "Otilde": 0x00D5,
-            "Ouml": 0x00D6,
-            "times": 0x00D7,
-            "Oslash": 0x00D8,
-            "Ugrave": 0x00D9,
-            "Uacute": 0x00DA,
-            "Ucirc": 0x00DB,
-            "Uuml": 0x00DC,
-            "Yacute": 0x00DD,
-            "THORN": 0x00DE,
-            "szlig": 0x00DF,
-            "agrave": 0x00E0,
-            "aacute": 0x00E1,
-            "acirc": 0x00E2,
-            "atilde": 0x00E3,
-            "auml": 0x00E4,
-            "aring": 0x00E5,
-            "aelig": 0x00E6,
-            "ccedil": 0x00E7,
-            "egrave": 0x00E8,
-            "eacute": 0x00E9,
-            "ecirc": 0x00EA,
-            "euml": 0x00EB,
-            "igrave": 0x00EC,
-            "iacute": 0x00ED,
-            "icirc": 0x00EE,
-            "iuml": 0x00EF,
-            "eth": 0x00F0,
-            "ntilde": 0x00F1,
-            "ograve": 0x00F2,
-            "oacute": 0x00F3,
-            "ocirc": 0x00F4,
-            "otilde": 0x00F5,
-            "ouml": 0x00F6,
-            "divide": 0x00F7,
-            "oslash": 0x00F8,
-            "ugrave": 0x00F9,
-            "uacute": 0x00FA,
-            "ucirc": 0x00FB,
-            "uuml": 0x00FC,
-            "yacute": 0x00FD,
-            "thorn": 0x00FE,
-            "yuml": 0x00FF,
-            "OElig": 0x0152,
-            "oelig": 0x0153,
-            "Scaron": 0x0160,
-            "scaron": 0x0161,
-            "Yuml": 0x0178,
-            "fnof": 0x0192,
-            "circ": 0x02C6,
-            "tilde": 0x02DC,
-            "Alpha": 0x0391,
-            "Beta": 0x0392,
-            "Gamma": 0x0393,
-            "Delta": 0x0394,
-            "Epsilon": 0x0395,
-            "Zeta": 0x0396,
-            "Eta": 0x0397,
-            "Theta": 0x0398,
-            "Iota": 0x0399,
-            "Kappa": 0x039A,
-            "Lambda": 0x039B,
-            "Mu": 0x039C,
-            "Nu": 0x039D,
-            "Xi": 0x039E,
-            "Omicron": 0x039F,
-            "Pi": 0x03A0,
-            "Rho": 0x03A1,
-            "Sigma": 0x03A3,
-            "Tau": 0x03A4,
-            "Upsilon": 0x03A5,
-            "Phi": 0x03A6,
-            "Chi": 0x03A7,
-            "Psi": 0x03A8,
-            "Omega": 0x03A9,
-            "alpha": 0x03B1,
-            "beta": 0x03B2,
-            "gamma": 0x03B3,
-            "delta": 0x03B4,
-            "epsilon": 0x03B5,
-            "zeta": 0x03B6,
-            "eta": 0x03B7,
-            "theta": 0x03B8,
-            "iota": 0x03B9,
-            "kappa": 0x03BA,
-            "lambda": 0x03BB,
-            "mu": 0x03BC,
-            "nu": 0x03BD,
-            "xi": 0x03BE,
-            "omicron": 0x03BF,
-            "pi": 0x03C0,
-            "rho": 0x03C1,
-            "sigmaf": 0x03C2,
-            "sigma": 0x03C3,
-            "tau": 0x03C4,
-            "upsilon": 0x03C5,
-            "phi": 0x03C6,
-            "chi": 0x03C7,
-            "psi": 0x03C8,
-            "omega": 0x03C9,
-            "thetasym": 0x03D1,
-            "upsih": 0x03D2,
-            "piv": 0x03D6,
-            "ensp": 0x2002,
-            "emsp": 0x2003,
-            "thinsp": 0x2009,
-            "zwnj": 0x200C,
-            "zwj": 0x200D,
-            "lrm": 0x200E,
-            "rlm": 0x200F,
-            "ndash": 0x2013,
-            "mdash": 0x2014,
-            "lsquo": 0x2018,
-            "rsquo": 0x2019,
-            "sbquo": 0x201A,
-            "ldquo": 0x201C,
-            "rdquo": 0x201D,
-            "bdquo": 0x201E,
-            "dagger": 0x2020,
-            "Dagger": 0x2021,
-            "bull": 0x2022,
-            "hellip": 0x2026,
-            "permil": 0x2030,
-            "prime": 0x2032,
-            "Prime": 0x2033,
-            "lsaquo": 0x2039,
-            "rsaquo": 0x203A,
-            "oline": 0x203E,
-            "frasl": 0x2044,
-            "euro": 0x20AC,
-            "image": 0x2111,
-            "weierp": 0x2118,
-            "real": 0x211C,
-            "trade": 0x2122,
-            "alefsym": 0x2135,
-            "larr": 0x2190,
-            "uarr": 0x2191,
-            "rarr": 0x2192,
-            "darr": 0x2193,
-            "harr": 0x2194,
-            "crarr": 0x21B5,
-            "lArr": 0x21D0,
-            "uArr": 0x21D1,
-            "rArr": 0x21D2,
-            "dArr": 0x21D3,
-            "hArr": 0x21D4,
-            "forall": 0x2200,
-            "part": 0x2202,
-            "exist": 0x2203,
-            "empty": 0x2205,
-            "nabla": 0x2207,
-            "isin": 0x2208,
-            "notin": 0x2209,
-            "ni": 0x220B,
-            "prod": 0x220F,
-            "sum": 0x2211,
-            "minus": 0x2212,
-            "lowast": 0x2217,
-            "radic": 0x221A,
-            "prop": 0x221D,
-            "infin": 0x221E,
-            "ang": 0x2220,
-            "and": 0x2227,
-            "or": 0x2228,
-            "cap": 0x2229,
-            "cup": 0x222A,
-            "int": 0x222B,
-            "there4": 0x2234,
-            "sim": 0x223C,
-            "cong": 0x2245,
-            "asymp": 0x2248,
-            "ne": 0x2260,
-            "equiv": 0x2261,
-            "le": 0x2264,
-            "ge": 0x2265,
-            "sub": 0x2282,
-            "sup": 0x2283,
-            "nsub": 0x2284,
-            "sube": 0x2286,
-            "supe": 0x2287,
-            "oplus": 0x2295,
-            "otimes": 0x2297,
-            "perp": 0x22A5,
-            "sdot": 0x22C5,
-            "lceil": 0x2308,
-            "rceil": 0x2309,
-            "lfloor": 0x230A,
-            "rfloor": 0x230B,
-            "lang": 0x2329,
-            "rang": 0x232A,
-            "loz": 0x25CA,
-            "spades": 0x2660,
-            "clubs": 0x2663,
-            "hearts": 0x2665,
-            "diams": 0x2666
-        });
-    }
+    var entities = ts.createMapFromTemplate({
+        "quot": 0x0022,
+        "amp": 0x0026,
+        "apos": 0x0027,
+        "lt": 0x003C,
+        "gt": 0x003E,
+        "nbsp": 0x00A0,
+        "iexcl": 0x00A1,
+        "cent": 0x00A2,
+        "pound": 0x00A3,
+        "curren": 0x00A4,
+        "yen": 0x00A5,
+        "brvbar": 0x00A6,
+        "sect": 0x00A7,
+        "uml": 0x00A8,
+        "copy": 0x00A9,
+        "ordf": 0x00AA,
+        "laquo": 0x00AB,
+        "not": 0x00AC,
+        "shy": 0x00AD,
+        "reg": 0x00AE,
+        "macr": 0x00AF,
+        "deg": 0x00B0,
+        "plusmn": 0x00B1,
+        "sup2": 0x00B2,
+        "sup3": 0x00B3,
+        "acute": 0x00B4,
+        "micro": 0x00B5,
+        "para": 0x00B6,
+        "middot": 0x00B7,
+        "cedil": 0x00B8,
+        "sup1": 0x00B9,
+        "ordm": 0x00BA,
+        "raquo": 0x00BB,
+        "frac14": 0x00BC,
+        "frac12": 0x00BD,
+        "frac34": 0x00BE,
+        "iquest": 0x00BF,
+        "Agrave": 0x00C0,
+        "Aacute": 0x00C1,
+        "Acirc": 0x00C2,
+        "Atilde": 0x00C3,
+        "Auml": 0x00C4,
+        "Aring": 0x00C5,
+        "AElig": 0x00C6,
+        "Ccedil": 0x00C7,
+        "Egrave": 0x00C8,
+        "Eacute": 0x00C9,
+        "Ecirc": 0x00CA,
+        "Euml": 0x00CB,
+        "Igrave": 0x00CC,
+        "Iacute": 0x00CD,
+        "Icirc": 0x00CE,
+        "Iuml": 0x00CF,
+        "ETH": 0x00D0,
+        "Ntilde": 0x00D1,
+        "Ograve": 0x00D2,
+        "Oacute": 0x00D3,
+        "Ocirc": 0x00D4,
+        "Otilde": 0x00D5,
+        "Ouml": 0x00D6,
+        "times": 0x00D7,
+        "Oslash": 0x00D8,
+        "Ugrave": 0x00D9,
+        "Uacute": 0x00DA,
+        "Ucirc": 0x00DB,
+        "Uuml": 0x00DC,
+        "Yacute": 0x00DD,
+        "THORN": 0x00DE,
+        "szlig": 0x00DF,
+        "agrave": 0x00E0,
+        "aacute": 0x00E1,
+        "acirc": 0x00E2,
+        "atilde": 0x00E3,
+        "auml": 0x00E4,
+        "aring": 0x00E5,
+        "aelig": 0x00E6,
+        "ccedil": 0x00E7,
+        "egrave": 0x00E8,
+        "eacute": 0x00E9,
+        "ecirc": 0x00EA,
+        "euml": 0x00EB,
+        "igrave": 0x00EC,
+        "iacute": 0x00ED,
+        "icirc": 0x00EE,
+        "iuml": 0x00EF,
+        "eth": 0x00F0,
+        "ntilde": 0x00F1,
+        "ograve": 0x00F2,
+        "oacute": 0x00F3,
+        "ocirc": 0x00F4,
+        "otilde": 0x00F5,
+        "ouml": 0x00F6,
+        "divide": 0x00F7,
+        "oslash": 0x00F8,
+        "ugrave": 0x00F9,
+        "uacute": 0x00FA,
+        "ucirc": 0x00FB,
+        "uuml": 0x00FC,
+        "yacute": 0x00FD,
+        "thorn": 0x00FE,
+        "yuml": 0x00FF,
+        "OElig": 0x0152,
+        "oelig": 0x0153,
+        "Scaron": 0x0160,
+        "scaron": 0x0161,
+        "Yuml": 0x0178,
+        "fnof": 0x0192,
+        "circ": 0x02C6,
+        "tilde": 0x02DC,
+        "Alpha": 0x0391,
+        "Beta": 0x0392,
+        "Gamma": 0x0393,
+        "Delta": 0x0394,
+        "Epsilon": 0x0395,
+        "Zeta": 0x0396,
+        "Eta": 0x0397,
+        "Theta": 0x0398,
+        "Iota": 0x0399,
+        "Kappa": 0x039A,
+        "Lambda": 0x039B,
+        "Mu": 0x039C,
+        "Nu": 0x039D,
+        "Xi": 0x039E,
+        "Omicron": 0x039F,
+        "Pi": 0x03A0,
+        "Rho": 0x03A1,
+        "Sigma": 0x03A3,
+        "Tau": 0x03A4,
+        "Upsilon": 0x03A5,
+        "Phi": 0x03A6,
+        "Chi": 0x03A7,
+        "Psi": 0x03A8,
+        "Omega": 0x03A9,
+        "alpha": 0x03B1,
+        "beta": 0x03B2,
+        "gamma": 0x03B3,
+        "delta": 0x03B4,
+        "epsilon": 0x03B5,
+        "zeta": 0x03B6,
+        "eta": 0x03B7,
+        "theta": 0x03B8,
+        "iota": 0x03B9,
+        "kappa": 0x03BA,
+        "lambda": 0x03BB,
+        "mu": 0x03BC,
+        "nu": 0x03BD,
+        "xi": 0x03BE,
+        "omicron": 0x03BF,
+        "pi": 0x03C0,
+        "rho": 0x03C1,
+        "sigmaf": 0x03C2,
+        "sigma": 0x03C3,
+        "tau": 0x03C4,
+        "upsilon": 0x03C5,
+        "phi": 0x03C6,
+        "chi": 0x03C7,
+        "psi": 0x03C8,
+        "omega": 0x03C9,
+        "thetasym": 0x03D1,
+        "upsih": 0x03D2,
+        "piv": 0x03D6,
+        "ensp": 0x2002,
+        "emsp": 0x2003,
+        "thinsp": 0x2009,
+        "zwnj": 0x200C,
+        "zwj": 0x200D,
+        "lrm": 0x200E,
+        "rlm": 0x200F,
+        "ndash": 0x2013,
+        "mdash": 0x2014,
+        "lsquo": 0x2018,
+        "rsquo": 0x2019,
+        "sbquo": 0x201A,
+        "ldquo": 0x201C,
+        "rdquo": 0x201D,
+        "bdquo": 0x201E,
+        "dagger": 0x2020,
+        "Dagger": 0x2021,
+        "bull": 0x2022,
+        "hellip": 0x2026,
+        "permil": 0x2030,
+        "prime": 0x2032,
+        "Prime": 0x2033,
+        "lsaquo": 0x2039,
+        "rsaquo": 0x203A,
+        "oline": 0x203E,
+        "frasl": 0x2044,
+        "euro": 0x20AC,
+        "image": 0x2111,
+        "weierp": 0x2118,
+        "real": 0x211C,
+        "trade": 0x2122,
+        "alefsym": 0x2135,
+        "larr": 0x2190,
+        "uarr": 0x2191,
+        "rarr": 0x2192,
+        "darr": 0x2193,
+        "harr": 0x2194,
+        "crarr": 0x21B5,
+        "lArr": 0x21D0,
+        "uArr": 0x21D1,
+        "rArr": 0x21D2,
+        "dArr": 0x21D3,
+        "hArr": 0x21D4,
+        "forall": 0x2200,
+        "part": 0x2202,
+        "exist": 0x2203,
+        "empty": 0x2205,
+        "nabla": 0x2207,
+        "isin": 0x2208,
+        "notin": 0x2209,
+        "ni": 0x220B,
+        "prod": 0x220F,
+        "sum": 0x2211,
+        "minus": 0x2212,
+        "lowast": 0x2217,
+        "radic": 0x221A,
+        "prop": 0x221D,
+        "infin": 0x221E,
+        "ang": 0x2220,
+        "and": 0x2227,
+        "or": 0x2228,
+        "cap": 0x2229,
+        "cup": 0x222A,
+        "int": 0x222B,
+        "there4": 0x2234,
+        "sim": 0x223C,
+        "cong": 0x2245,
+        "asymp": 0x2248,
+        "ne": 0x2260,
+        "equiv": 0x2261,
+        "le": 0x2264,
+        "ge": 0x2265,
+        "sub": 0x2282,
+        "sup": 0x2283,
+        "nsub": 0x2284,
+        "sube": 0x2286,
+        "supe": 0x2287,
+        "oplus": 0x2295,
+        "otimes": 0x2297,
+        "perp": 0x22A5,
+        "sdot": 0x22C5,
+        "lceil": 0x2308,
+        "rceil": 0x2309,
+        "lfloor": 0x230A,
+        "rfloor": 0x230B,
+        "lang": 0x2329,
+        "rang": 0x232A,
+        "loz": 0x25CA,
+        "spades": 0x2660,
+        "clubs": 0x2663,
+        "hearts": 0x2665,
+        "diams": 0x2666
+    });
 })(ts || (ts = {}));
 /// <reference path="../factory.ts" />
 /// <reference path="../visitor.ts" />
 /*@internal*/
 var ts;
 (function (ts) {
-    function transformES7(context) {
+    function transformES2016(context) {
         var hoistVariableDeclaration = context.hoistVariableDeclaration;
         return transformSourceFile;
         function transformSourceFile(node) {
-            if (ts.isDeclarationFile(node)) {
+            if (node.isDeclarationFile) {
                 return node;
             }
             return ts.visitEachChild(node, visitor, context);
         }
         function visitor(node) {
-            if (node.transformFlags & 16 /* ES7 */) {
-                return visitorWorker(node);
-            }
-            else if (node.transformFlags & 32 /* ContainsES7 */) {
-                return ts.visitEachChild(node, visitor, context);
-            }
-            else {
+            if ((node.transformFlags & 32 /* ContainsES2016 */) === 0) {
                 return node;
             }
-        }
-        function visitorWorker(node) {
             switch (node.kind) {
-                case 187 /* BinaryExpression */:
+                case 194 /* BinaryExpression */:
                     return visitBinaryExpression(node);
                 default:
-                    ts.Debug.failBadSyntaxKind(node);
                     return ts.visitEachChild(node, visitor, context);
             }
         }
         function visitBinaryExpression(node) {
-            // We are here because ES7 adds support for the exponentiation operator.
+            switch (node.operatorToken.kind) {
+                case 62 /* AsteriskAsteriskEqualsToken */:
+                    return visitExponentiationAssignmentExpression(node);
+                case 40 /* AsteriskAsteriskToken */:
+                    return visitExponentiationExpression(node);
+                default:
+                    return ts.visitEachChild(node, visitor, context);
+            }
+        }
+        function visitExponentiationAssignmentExpression(node) {
+            var target;
+            var value;
             var left = ts.visitNode(node.left, visitor, ts.isExpression);
             var right = ts.visitNode(node.right, visitor, ts.isExpression);
-            if (node.operatorToken.kind === 60 /* AsteriskAsteriskEqualsToken */) {
-                var target = void 0;
-                var value = void 0;
-                if (ts.isElementAccessExpression(left)) {
-                    // Transforms `a[x] **= b` into `(_a = a)[_x = x] = Math.pow(_a[_x], b)`
-                    var expressionTemp = ts.createTempVariable(hoistVariableDeclaration);
-                    var argumentExpressionTemp = ts.createTempVariable(hoistVariableDeclaration);
-                    target = ts.createElementAccess(ts.createAssignment(expressionTemp, left.expression, /*location*/ left.expression), ts.createAssignment(argumentExpressionTemp, left.argumentExpression, /*location*/ left.argumentExpression), 
-                    /*location*/ left);
-                    value = ts.createElementAccess(expressionTemp, argumentExpressionTemp, 
-                    /*location*/ left);
-                }
-                else if (ts.isPropertyAccessExpression(left)) {
-                    // Transforms `a.x **= b` into `(_a = a).x = Math.pow(_a.x, b)`
-                    var expressionTemp = ts.createTempVariable(hoistVariableDeclaration);
-                    target = ts.createPropertyAccess(ts.createAssignment(expressionTemp, left.expression, /*location*/ left.expression), left.name, 
-                    /*location*/ left);
-                    value = ts.createPropertyAccess(expressionTemp, left.name, 
-                    /*location*/ left);
-                }
-                else {
-                    // Transforms `a **= b` into `a = Math.pow(a, b)`
-                    target = left;
-                    value = left;
-                }
-                return ts.createAssignment(target, ts.createMathPow(value, right, /*location*/ node), /*location*/ node);
-            }
-            else if (node.operatorToken.kind === 38 /* AsteriskAsteriskToken */) {
-                // Transforms `a ** b` into `Math.pow(a, b)`
-                return ts.createMathPow(left, right, /*location*/ node);
+            if (ts.isElementAccessExpression(left)) {
+                // Transforms `a[x] **= b` into `(_a = a)[_x = x] = Math.pow(_a[_x], b)`
+                var expressionTemp = ts.createTempVariable(hoistVariableDeclaration);
+                var argumentExpressionTemp = ts.createTempVariable(hoistVariableDeclaration);
+                target = ts.setTextRange(ts.createElementAccess(ts.setTextRange(ts.createAssignment(expressionTemp, left.expression), left.expression), ts.setTextRange(ts.createAssignment(argumentExpressionTemp, left.argumentExpression), left.argumentExpression)), left);
+                value = ts.setTextRange(ts.createElementAccess(expressionTemp, argumentExpressionTemp), left);
+            }
+            else if (ts.isPropertyAccessExpression(left)) {
+                // Transforms `a.x **= b` into `(_a = a).x = Math.pow(_a.x, b)`
+                var expressionTemp = ts.createTempVariable(hoistVariableDeclaration);
+                target = ts.setTextRange(ts.createPropertyAccess(ts.setTextRange(ts.createAssignment(expressionTemp, left.expression), left.expression), left.name), left);
+                value = ts.setTextRange(ts.createPropertyAccess(expressionTemp, left.name), left);
             }
             else {
-                ts.Debug.failBadSyntaxKind(node);
-                return ts.visitEachChild(node, visitor, context);
+                // Transforms `a **= b` into `a = Math.pow(a, b)`
+                target = left;
+                value = left;
             }
+            return ts.setTextRange(ts.createAssignment(target, ts.createMathPow(value, right, /*location*/ node)), node);
+        }
+        function visitExponentiationExpression(node) {
+            // Transforms `a ** b` into `Math.pow(a, b)`
+            var left = ts.visitNode(node.left, visitor, ts.isExpression);
+            var right = ts.visitNode(node.right, visitor, ts.isExpression);
+            return ts.createMathPow(left, right, /*location*/ node);
         }
     }
-    ts.transformES7 = transformES7;
+    ts.transformES2016 = transformES2016;
 })(ts || (ts = {}));
 /// <reference path="../factory.ts" />
 /// <reference path="../visitor.ts" />
+/// <reference path="./destructuring.ts" />
 /*@internal*/
 var ts;
 (function (ts) {
-    var ES6SubstitutionFlags;
-    (function (ES6SubstitutionFlags) {
+    var ES2015SubstitutionFlags;
+    (function (ES2015SubstitutionFlags) {
         /** Enables substitutions for captured `this` */
-        ES6SubstitutionFlags[ES6SubstitutionFlags["CapturedThis"] = 1] = "CapturedThis";
+        ES2015SubstitutionFlags[ES2015SubstitutionFlags["CapturedThis"] = 1] = "CapturedThis";
         /** Enables substitutions for block-scoped bindings. */
-        ES6SubstitutionFlags[ES6SubstitutionFlags["BlockScopedBindings"] = 2] = "BlockScopedBindings";
-    })(ES6SubstitutionFlags || (ES6SubstitutionFlags = {}));
+        ES2015SubstitutionFlags[ES2015SubstitutionFlags["BlockScopedBindings"] = 2] = "BlockScopedBindings";
+    })(ES2015SubstitutionFlags || (ES2015SubstitutionFlags = {}));
     var CopyDirection;
     (function (CopyDirection) {
         CopyDirection[CopyDirection["ToOriginal"] = 0] = "ToOriginal";
@@ -48653,8 +58693,85 @@ var ts;
          */
         SuperCaptureResult[SuperCaptureResult["ReplaceWithReturn"] = 2] = "ReplaceWithReturn";
     })(SuperCaptureResult || (SuperCaptureResult = {}));
-    function transformES6(context) {
-        var startLexicalEnvironment = context.startLexicalEnvironment, endLexicalEnvironment = context.endLexicalEnvironment, hoistVariableDeclaration = context.hoistVariableDeclaration;
+    // Facts we track as we traverse the tree
+    var HierarchyFacts;
+    (function (HierarchyFacts) {
+        HierarchyFacts[HierarchyFacts["None"] = 0] = "None";
+        //
+        // Ancestor facts
+        //
+        HierarchyFacts[HierarchyFacts["Function"] = 1] = "Function";
+        HierarchyFacts[HierarchyFacts["ArrowFunction"] = 2] = "ArrowFunction";
+        HierarchyFacts[HierarchyFacts["AsyncFunctionBody"] = 4] = "AsyncFunctionBody";
+        HierarchyFacts[HierarchyFacts["NonStaticClassElement"] = 8] = "NonStaticClassElement";
+        HierarchyFacts[HierarchyFacts["CapturesThis"] = 16] = "CapturesThis";
+        HierarchyFacts[HierarchyFacts["ExportedVariableStatement"] = 32] = "ExportedVariableStatement";
+        HierarchyFacts[HierarchyFacts["TopLevel"] = 64] = "TopLevel";
+        HierarchyFacts[HierarchyFacts["Block"] = 128] = "Block";
+        HierarchyFacts[HierarchyFacts["IterationStatement"] = 256] = "IterationStatement";
+        HierarchyFacts[HierarchyFacts["IterationStatementBlock"] = 512] = "IterationStatementBlock";
+        HierarchyFacts[HierarchyFacts["ForStatement"] = 1024] = "ForStatement";
+        HierarchyFacts[HierarchyFacts["ForInOrForOfStatement"] = 2048] = "ForInOrForOfStatement";
+        HierarchyFacts[HierarchyFacts["ConstructorWithCapturedSuper"] = 4096] = "ConstructorWithCapturedSuper";
+        HierarchyFacts[HierarchyFacts["ComputedPropertyName"] = 8192] = "ComputedPropertyName";
+        // NOTE: do not add more ancestor flags without also updating AncestorFactsMask below.
+        //
+        // Ancestor masks
+        //
+        HierarchyFacts[HierarchyFacts["AncestorFactsMask"] = 16383] = "AncestorFactsMask";
+        // We are always in *some* kind of block scope, but only specific block-scope containers are
+        // top-level or Blocks.
+        HierarchyFacts[HierarchyFacts["BlockScopeIncludes"] = 0] = "BlockScopeIncludes";
+        HierarchyFacts[HierarchyFacts["BlockScopeExcludes"] = 4032] = "BlockScopeExcludes";
+        // A source file is a top-level block scope.
+        HierarchyFacts[HierarchyFacts["SourceFileIncludes"] = 64] = "SourceFileIncludes";
+        HierarchyFacts[HierarchyFacts["SourceFileExcludes"] = 3968] = "SourceFileExcludes";
+        // Functions, methods, and accessors are both new lexical scopes and new block scopes.
+        HierarchyFacts[HierarchyFacts["FunctionIncludes"] = 65] = "FunctionIncludes";
+        HierarchyFacts[HierarchyFacts["FunctionExcludes"] = 16286] = "FunctionExcludes";
+        HierarchyFacts[HierarchyFacts["AsyncFunctionBodyIncludes"] = 69] = "AsyncFunctionBodyIncludes";
+        HierarchyFacts[HierarchyFacts["AsyncFunctionBodyExcludes"] = 16278] = "AsyncFunctionBodyExcludes";
+        // Arrow functions are lexically scoped to their container, but are new block scopes.
+        HierarchyFacts[HierarchyFacts["ArrowFunctionIncludes"] = 66] = "ArrowFunctionIncludes";
+        HierarchyFacts[HierarchyFacts["ArrowFunctionExcludes"] = 16256] = "ArrowFunctionExcludes";
+        // Constructors are both new lexical scopes and new block scopes. Constructors are also
+        // always considered non-static members of a class.
+        HierarchyFacts[HierarchyFacts["ConstructorIncludes"] = 73] = "ConstructorIncludes";
+        HierarchyFacts[HierarchyFacts["ConstructorExcludes"] = 16278] = "ConstructorExcludes";
+        // 'do' and 'while' statements are not block scopes. We track that the subtree is contained
+        // within an IterationStatement to indicate whether the embedded statement is an
+        // IterationStatementBlock.
+        HierarchyFacts[HierarchyFacts["DoOrWhileStatementIncludes"] = 256] = "DoOrWhileStatementIncludes";
+        HierarchyFacts[HierarchyFacts["DoOrWhileStatementExcludes"] = 0] = "DoOrWhileStatementExcludes";
+        // 'for' statements are new block scopes and have special handling for 'let' declarations.
+        HierarchyFacts[HierarchyFacts["ForStatementIncludes"] = 1280] = "ForStatementIncludes";
+        HierarchyFacts[HierarchyFacts["ForStatementExcludes"] = 3008] = "ForStatementExcludes";
+        // 'for-in' and 'for-of' statements are new block scopes and have special handling for
+        // 'let' declarations.
+        HierarchyFacts[HierarchyFacts["ForInOrForOfStatementIncludes"] = 2304] = "ForInOrForOfStatementIncludes";
+        HierarchyFacts[HierarchyFacts["ForInOrForOfStatementExcludes"] = 1984] = "ForInOrForOfStatementExcludes";
+        // Blocks (other than function bodies) are new block scopes.
+        HierarchyFacts[HierarchyFacts["BlockIncludes"] = 128] = "BlockIncludes";
+        HierarchyFacts[HierarchyFacts["BlockExcludes"] = 3904] = "BlockExcludes";
+        HierarchyFacts[HierarchyFacts["IterationStatementBlockIncludes"] = 512] = "IterationStatementBlockIncludes";
+        HierarchyFacts[HierarchyFacts["IterationStatementBlockExcludes"] = 4032] = "IterationStatementBlockExcludes";
+        // Computed property names track subtree flags differently than their containing members.
+        HierarchyFacts[HierarchyFacts["ComputedPropertyNameIncludes"] = 8192] = "ComputedPropertyNameIncludes";
+        HierarchyFacts[HierarchyFacts["ComputedPropertyNameExcludes"] = 0] = "ComputedPropertyNameExcludes";
+        //
+        // Subtree facts
+        //
+        HierarchyFacts[HierarchyFacts["NewTarget"] = 16384] = "NewTarget";
+        HierarchyFacts[HierarchyFacts["NewTargetInComputedPropertyName"] = 32768] = "NewTargetInComputedPropertyName";
+        //
+        // Subtree masks
+        //
+        HierarchyFacts[HierarchyFacts["SubtreeFactsMask"] = -16384] = "SubtreeFactsMask";
+        HierarchyFacts[HierarchyFacts["PropagateNewTargetMask"] = 49152] = "PropagateNewTargetMask";
+    })(HierarchyFacts || (HierarchyFacts = {}));
+    function transformES2015(context) {
+        var startLexicalEnvironment = context.startLexicalEnvironment, resumeLexicalEnvironment = context.resumeLexicalEnvironment, endLexicalEnvironment = context.endLexicalEnvironment, hoistVariableDeclaration = context.hoistVariableDeclaration;
+        var compilerOptions = context.getCompilerOptions();
         var resolver = context.getEmitResolver();
         var previousOnSubstituteNode = context.onSubstituteNode;
         var previousOnEmitNode = context.onEmitNode;
@@ -48662,14 +58779,7 @@ var ts;
         context.onSubstituteNode = onSubstituteNode;
         var currentSourceFile;
         var currentText;
-        var currentParent;
-        var currentNode;
-        var enclosingVariableStatement;
-        var enclosingBlockScopeContainer;
-        var enclosingBlockScopeContainerParent;
-        var enclosingFunction;
-        var enclosingNonArrowFunction;
-        var enclosingNonAsyncFunctionBody;
+        var hierarchyFacts;
         /**
          * Used to track if we are emitting body of the converted loop
          */
@@ -48682,231 +58792,273 @@ var ts;
         var enabledSubstitutions;
         return transformSourceFile;
         function transformSourceFile(node) {
-            if (ts.isDeclarationFile(node)) {
+            if (node.isDeclarationFile) {
                 return node;
             }
             currentSourceFile = node;
             currentText = node.text;
-            return ts.visitNode(node, visitor, ts.isSourceFile);
+            var visited = visitSourceFile(node);
+            ts.addEmitHelpers(visited, context.readEmitHelpers());
+            currentSourceFile = undefined;
+            currentText = undefined;
+            hierarchyFacts = 0 /* None */;
+            return visited;
         }
-        function visitor(node) {
-            return saveStateAndInvoke(node, dispatcher);
+        /**
+         * Sets the `HierarchyFacts` for this node prior to visiting this node's subtree, returning the facts set prior to modification.
+         * @param excludeFacts The existing `HierarchyFacts` to reset before visiting the subtree.
+         * @param includeFacts The new `HierarchyFacts` to set before visiting the subtree.
+         */
+        function enterSubtree(excludeFacts, includeFacts) {
+            var ancestorFacts = hierarchyFacts;
+            hierarchyFacts = (hierarchyFacts & ~excludeFacts | includeFacts) & 16383 /* AncestorFactsMask */;
+            return ancestorFacts;
+        }
+        /**
+         * Restores the `HierarchyFacts` for this node's ancestor after visiting this node's
+         * subtree, propagating specific facts from the subtree.
+         * @param ancestorFacts The `HierarchyFacts` of the ancestor to restore after visiting the subtree.
+         * @param excludeFacts The existing `HierarchyFacts` of the subtree that should not be propagated.
+         * @param includeFacts The new `HierarchyFacts` of the subtree that should be propagated.
+         */
+        function exitSubtree(ancestorFacts, excludeFacts, includeFacts) {
+            hierarchyFacts = (hierarchyFacts & ~excludeFacts | includeFacts) & -16384 /* SubtreeFactsMask */ | ancestorFacts;
         }
-        function dispatcher(node) {
-            return convertedLoopState
-                ? visitorForConvertedLoopWorker(node)
-                : visitorWorker(node);
+        function isReturnVoidStatementInConstructorWithCapturedSuper(node) {
+            return hierarchyFacts & 4096 /* ConstructorWithCapturedSuper */
+                && node.kind === 219 /* ReturnStatement */
+                && !node.expression;
         }
-        function saveStateAndInvoke(node, f) {
-            var savedEnclosingFunction = enclosingFunction;
-            var savedEnclosingNonArrowFunction = enclosingNonArrowFunction;
-            var savedEnclosingNonAsyncFunctionBody = enclosingNonAsyncFunctionBody;
-            var savedEnclosingBlockScopeContainer = enclosingBlockScopeContainer;
-            var savedEnclosingBlockScopeContainerParent = enclosingBlockScopeContainerParent;
-            var savedEnclosingVariableStatement = enclosingVariableStatement;
-            var savedCurrentParent = currentParent;
-            var savedCurrentNode = currentNode;
-            var savedConvertedLoopState = convertedLoopState;
-            if (ts.nodeStartsNewLexicalEnvironment(node)) {
-                // don't treat content of nodes that start new lexical environment as part of converted loop copy
-                convertedLoopState = undefined;
+        function isClassLikeVariableStatement(node) {
+            if (!ts.isVariableStatement(node))
+                return false;
+            var variable = ts.singleOrUndefined(node.declarationList.declarations);
+            return variable
+                && variable.initializer
+                && ts.isIdentifier(variable.name)
+                && (ts.isClassLike(variable.initializer)
+                    || (ts.isAssignmentExpression(variable.initializer)
+                        && ts.isIdentifier(variable.initializer.left)
+                        && ts.isClassLike(variable.initializer.right)));
+        }
+        function isTypeScriptClassWrapper(node) {
+            var call = ts.tryCast(node, ts.isCallExpression);
+            if (!call || ts.isParseTreeNode(call) ||
+                ts.some(call.typeArguments) ||
+                ts.some(call.arguments)) {
+                return false;
             }
-            onBeforeVisitNode(node);
-            var visited = f(node);
-            convertedLoopState = savedConvertedLoopState;
-            enclosingFunction = savedEnclosingFunction;
-            enclosingNonArrowFunction = savedEnclosingNonArrowFunction;
-            enclosingNonAsyncFunctionBody = savedEnclosingNonAsyncFunctionBody;
-            enclosingBlockScopeContainer = savedEnclosingBlockScopeContainer;
-            enclosingBlockScopeContainerParent = savedEnclosingBlockScopeContainerParent;
-            enclosingVariableStatement = savedEnclosingVariableStatement;
-            currentParent = savedCurrentParent;
-            currentNode = savedCurrentNode;
-            return visited;
+            var func = ts.tryCast(ts.skipOuterExpressions(call.expression), ts.isFunctionExpression);
+            if (!func || ts.isParseTreeNode(func) ||
+                ts.some(func.typeParameters) ||
+                ts.some(func.parameters) ||
+                func.type ||
+                !func.body) {
+                return false;
+            }
+            var statements = func.body.statements;
+            if (statements.length < 2) {
+                return false;
+            }
+            var firstStatement = statements[0];
+            if (ts.isParseTreeNode(firstStatement) ||
+                !ts.isClassLike(firstStatement) &&
+                    !isClassLikeVariableStatement(firstStatement)) {
+                return false;
+            }
+            var lastStatement = ts.elementAt(statements, -1);
+            var returnStatement = ts.tryCast(ts.isVariableStatement(lastStatement) ? ts.elementAt(statements, -2) : lastStatement, ts.isReturnStatement);
+            if (!returnStatement ||
+                !returnStatement.expression ||
+                !ts.isIdentifier(ts.skipOuterExpressions(returnStatement.expression))) {
+                return false;
+            }
+            return true;
         }
-        function shouldCheckNode(node) {
-            return (node.transformFlags & 64 /* ES6 */) !== 0 ||
-                node.kind === 214 /* LabeledStatement */ ||
-                (ts.isIterationStatement(node, /*lookInLabeledStatements*/ false) && shouldConvertIterationStatementBody(node));
+        function shouldVisitNode(node) {
+            return (node.transformFlags & 128 /* ContainsES2015 */) !== 0
+                || convertedLoopState !== undefined
+                || (hierarchyFacts & 4096 /* ConstructorWithCapturedSuper */ && ts.isStatement(node))
+                || (ts.isIterationStatement(node, /*lookInLabeledStatements*/ false) && shouldConvertIterationStatementBody(node))
+                || isTypeScriptClassWrapper(node);
         }
-        function visitorWorker(node) {
-            if (shouldCheckNode(node)) {
+        function visitor(node) {
+            if (shouldVisitNode(node)) {
                 return visitJavaScript(node);
             }
-            else if (node.transformFlags & 128 /* ContainsES6 */) {
-                return ts.visitEachChild(node, visitor, context);
-            }
             else {
                 return node;
             }
         }
-        function visitorForConvertedLoopWorker(node) {
-            var result;
-            if (shouldCheckNode(node)) {
-                result = visitJavaScript(node);
+        function functionBodyVisitor(node) {
+            if (shouldVisitNode(node)) {
+                return visitBlock(node, /*isFunctionBody*/ true);
             }
-            else {
-                result = visitNodesInConvertedLoop(node);
-            }
-            return result;
+            return node;
         }
-        function visitNodesInConvertedLoop(node) {
-            switch (node.kind) {
-                case 211 /* ReturnStatement */:
-                    return visitReturnStatement(node);
-                case 200 /* VariableStatement */:
-                    return visitVariableStatement(node);
-                case 213 /* SwitchStatement */:
-                    return visitSwitchStatement(node);
-                case 210 /* BreakStatement */:
-                case 209 /* ContinueStatement */:
-                    return visitBreakOrContinueStatement(node);
-                case 97 /* ThisKeyword */:
-                    return visitThisKeyword(node);
-                case 69 /* Identifier */:
-                    return visitIdentifier(node);
-                default:
-                    return ts.visitEachChild(node, visitor, context);
+        function callExpressionVisitor(node) {
+            if (node.kind === 97 /* SuperKeyword */) {
+                return visitSuperKeyword(/*isExpressionOfCall*/ true);
             }
+            return visitor(node);
         }
         function visitJavaScript(node) {
             switch (node.kind) {
-                case 82 /* ExportKeyword */:
-                    return node;
-                case 221 /* ClassDeclaration */:
+                case 115 /* StaticKeyword */:
+                    return undefined; // elide static keyword
+                case 229 /* ClassDeclaration */:
                     return visitClassDeclaration(node);
-                case 192 /* ClassExpression */:
+                case 199 /* ClassExpression */:
                     return visitClassExpression(node);
-                case 142 /* Parameter */:
+                case 146 /* Parameter */:
                     return visitParameter(node);
-                case 220 /* FunctionDeclaration */:
+                case 228 /* FunctionDeclaration */:
                     return visitFunctionDeclaration(node);
-                case 180 /* ArrowFunction */:
+                case 187 /* ArrowFunction */:
                     return visitArrowFunction(node);
-                case 179 /* FunctionExpression */:
+                case 186 /* FunctionExpression */:
                     return visitFunctionExpression(node);
-                case 218 /* VariableDeclaration */:
+                case 226 /* VariableDeclaration */:
                     return visitVariableDeclaration(node);
-                case 69 /* Identifier */:
+                case 71 /* Identifier */:
                     return visitIdentifier(node);
-                case 219 /* VariableDeclarationList */:
+                case 227 /* VariableDeclarationList */:
                     return visitVariableDeclarationList(node);
-                case 214 /* LabeledStatement */:
+                case 221 /* SwitchStatement */:
+                    return visitSwitchStatement(node);
+                case 235 /* CaseBlock */:
+                    return visitCaseBlock(node);
+                case 207 /* Block */:
+                    return visitBlock(node, /*isFunctionBody*/ false);
+                case 218 /* BreakStatement */:
+                case 217 /* ContinueStatement */:
+                    return visitBreakOrContinueStatement(node);
+                case 222 /* LabeledStatement */:
                     return visitLabeledStatement(node);
-                case 204 /* DoStatement */:
-                    return visitDoStatement(node);
-                case 205 /* WhileStatement */:
-                    return visitWhileStatement(node);
-                case 206 /* ForStatement */:
-                    return visitForStatement(node);
-                case 207 /* ForInStatement */:
-                    return visitForInStatement(node);
-                case 208 /* ForOfStatement */:
-                    return visitForOfStatement(node);
-                case 202 /* ExpressionStatement */:
+                case 212 /* DoStatement */:
+                case 213 /* WhileStatement */:
+                    return visitDoOrWhileStatement(node, /*outermostLabeledStatement*/ undefined);
+                case 214 /* ForStatement */:
+                    return visitForStatement(node, /*outermostLabeledStatement*/ undefined);
+                case 215 /* ForInStatement */:
+                    return visitForInStatement(node, /*outermostLabeledStatement*/ undefined);
+                case 216 /* ForOfStatement */:
+                    return visitForOfStatement(node, /*outermostLabeledStatement*/ undefined);
+                case 210 /* ExpressionStatement */:
                     return visitExpressionStatement(node);
-                case 171 /* ObjectLiteralExpression */:
+                case 178 /* ObjectLiteralExpression */:
                     return visitObjectLiteralExpression(node);
-                case 254 /* ShorthandPropertyAssignment */:
+                case 260 /* CatchClause */:
+                    return visitCatchClause(node);
+                case 262 /* ShorthandPropertyAssignment */:
                     return visitShorthandPropertyAssignment(node);
-                case 170 /* ArrayLiteralExpression */:
+                case 144 /* ComputedPropertyName */:
+                    return visitComputedPropertyName(node);
+                case 177 /* ArrayLiteralExpression */:
                     return visitArrayLiteralExpression(node);
-                case 174 /* CallExpression */:
+                case 181 /* CallExpression */:
                     return visitCallExpression(node);
-                case 175 /* NewExpression */:
+                case 182 /* NewExpression */:
                     return visitNewExpression(node);
-                case 178 /* ParenthesizedExpression */:
+                case 185 /* ParenthesizedExpression */:
                     return visitParenthesizedExpression(node, /*needsDestructuringValue*/ true);
-                case 187 /* BinaryExpression */:
+                case 194 /* BinaryExpression */:
                     return visitBinaryExpression(node, /*needsDestructuringValue*/ true);
-                case 11 /* NoSubstitutionTemplateLiteral */:
-                case 12 /* TemplateHead */:
-                case 13 /* TemplateMiddle */:
-                case 14 /* TemplateTail */:
+                case 13 /* NoSubstitutionTemplateLiteral */:
+                case 14 /* TemplateHead */:
+                case 15 /* TemplateMiddle */:
+                case 16 /* TemplateTail */:
                     return visitTemplateLiteral(node);
-                case 176 /* TaggedTemplateExpression */:
+                case 9 /* StringLiteral */:
+                    return visitStringLiteral(node);
+                case 8 /* NumericLiteral */:
+                    return visitNumericLiteral(node);
+                case 183 /* TaggedTemplateExpression */:
                     return visitTaggedTemplateExpression(node);
-                case 189 /* TemplateExpression */:
+                case 196 /* TemplateExpression */:
                     return visitTemplateExpression(node);
-                case 190 /* YieldExpression */:
+                case 197 /* YieldExpression */:
                     return visitYieldExpression(node);
-                case 95 /* SuperKeyword */:
-                    return visitSuperKeyword(node);
-                case 190 /* YieldExpression */:
-                    // `yield` will be handled by a generators transform.
-                    return ts.visitEachChild(node, visitor, context);
-                case 147 /* MethodDeclaration */:
+                case 198 /* SpreadElement */:
+                    return visitSpreadElement(node);
+                case 97 /* SuperKeyword */:
+                    return visitSuperKeyword(/*isExpressionOfCall*/ false);
+                case 99 /* ThisKeyword */:
+                    return visitThisKeyword(node);
+                case 204 /* MetaProperty */:
+                    return visitMetaProperty(node);
+                case 151 /* MethodDeclaration */:
                     return visitMethodDeclaration(node);
-                case 256 /* SourceFile */:
-                    return visitSourceFileNode(node);
-                case 200 /* VariableStatement */:
+                case 153 /* GetAccessor */:
+                case 154 /* SetAccessor */:
+                    return visitAccessorDeclaration(node);
+                case 208 /* VariableStatement */:
                     return visitVariableStatement(node);
+                case 219 /* ReturnStatement */:
+                    return visitReturnStatement(node);
                 default:
-                    ts.Debug.failBadSyntaxKind(node);
                     return ts.visitEachChild(node, visitor, context);
             }
         }
-        function onBeforeVisitNode(node) {
-            if (currentNode) {
-                if (ts.isBlockScope(currentNode, currentParent)) {
-                    enclosingBlockScopeContainer = currentNode;
-                    enclosingBlockScopeContainerParent = currentParent;
-                }
-                if (ts.isFunctionLike(currentNode)) {
-                    enclosingFunction = currentNode;
-                    if (currentNode.kind !== 180 /* ArrowFunction */) {
-                        enclosingNonArrowFunction = currentNode;
-                        if (!(ts.getEmitFlags(currentNode) & 2097152 /* AsyncFunctionBody */)) {
-                            enclosingNonAsyncFunctionBody = currentNode;
-                        }
-                    }
-                }
-                // keep track of the enclosing variable statement when in the context of
-                // variable statements, variable declarations, binding elements, and binding
-                // patterns.
-                switch (currentNode.kind) {
-                    case 200 /* VariableStatement */:
-                        enclosingVariableStatement = currentNode;
-                        break;
-                    case 219 /* VariableDeclarationList */:
-                    case 218 /* VariableDeclaration */:
-                    case 169 /* BindingElement */:
-                    case 167 /* ObjectBindingPattern */:
-                    case 168 /* ArrayBindingPattern */:
-                        break;
-                    default:
-                        enclosingVariableStatement = undefined;
-                }
-            }
-            currentParent = currentNode;
-            currentNode = node;
+        function visitSourceFile(node) {
+            var ancestorFacts = enterSubtree(3968 /* SourceFileExcludes */, 64 /* SourceFileIncludes */);
+            var statements = [];
+            startLexicalEnvironment();
+            var statementOffset = ts.addStandardPrologue(statements, node.statements, /*ensureUseStrict*/ false);
+            addCaptureThisForNodeIfNeeded(statements, node);
+            statementOffset = ts.addCustomPrologue(statements, node.statements, statementOffset, visitor);
+            ts.addRange(statements, ts.visitNodes(node.statements, visitor, ts.isStatement, statementOffset));
+            ts.addRange(statements, endLexicalEnvironment());
+            exitSubtree(ancestorFacts, 0 /* None */, 0 /* None */);
+            return ts.updateSourceFileNode(node, ts.setTextRange(ts.createNodeArray(statements), node.statements));
         }
         function visitSwitchStatement(node) {
-            ts.Debug.assert(convertedLoopState !== undefined);
-            var savedAllowedNonLabeledJumps = convertedLoopState.allowedNonLabeledJumps;
-            // for switch statement allow only non-labeled break
-            convertedLoopState.allowedNonLabeledJumps |= 2 /* Break */;
-            var result = ts.visitEachChild(node, visitor, context);
-            convertedLoopState.allowedNonLabeledJumps = savedAllowedNonLabeledJumps;
-            return result;
+            if (convertedLoopState !== undefined) {
+                var savedAllowedNonLabeledJumps = convertedLoopState.allowedNonLabeledJumps;
+                // for switch statement allow only non-labeled break
+                convertedLoopState.allowedNonLabeledJumps |= 2 /* Break */;
+                var result = ts.visitEachChild(node, visitor, context);
+                convertedLoopState.allowedNonLabeledJumps = savedAllowedNonLabeledJumps;
+                return result;
+            }
+            return ts.visitEachChild(node, visitor, context);
+        }
+        function visitCaseBlock(node) {
+            var ancestorFacts = enterSubtree(4032 /* BlockScopeExcludes */, 0 /* BlockScopeIncludes */);
+            var updated = ts.visitEachChild(node, visitor, context);
+            exitSubtree(ancestorFacts, 0 /* None */, 0 /* None */);
+            return updated;
+        }
+        function returnCapturedThis(node) {
+            return ts.setOriginalNode(ts.createReturn(ts.createIdentifier("_this")), node);
         }
         function visitReturnStatement(node) {
-            ts.Debug.assert(convertedLoopState !== undefined);
-            convertedLoopState.nonLocalJumps |= 8 /* Return */;
-            return ts.createReturn(ts.createObjectLiteral([
-                ts.createPropertyAssignment(ts.createIdentifier("value"), node.expression
-                    ? ts.visitNode(node.expression, visitor, ts.isExpression)
-                    : ts.createVoidZero())
-            ]));
+            if (convertedLoopState) {
+                convertedLoopState.nonLocalJumps |= 8 /* Return */;
+                if (isReturnVoidStatementInConstructorWithCapturedSuper(node)) {
+                    node = returnCapturedThis(node);
+                }
+                return ts.createReturn(ts.createObjectLiteral([
+                    ts.createPropertyAssignment(ts.createIdentifier("value"), node.expression
+                        ? ts.visitNode(node.expression, visitor, ts.isExpression)
+                        : ts.createVoidZero())
+                ]));
+            }
+            else if (isReturnVoidStatementInConstructorWithCapturedSuper(node)) {
+                return returnCapturedThis(node);
+            }
+            return ts.visitEachChild(node, visitor, context);
         }
         function visitThisKeyword(node) {
-            ts.Debug.assert(convertedLoopState !== undefined);
-            if (enclosingFunction && enclosingFunction.kind === 180 /* ArrowFunction */) {
-                // if the enclosing function is an ArrowFunction is then we use the captured 'this' keyword.
-                convertedLoopState.containsLexicalThis = true;
-                return node;
+            if (convertedLoopState) {
+                if (hierarchyFacts & 2 /* ArrowFunction */) {
+                    // if the enclosing function is an ArrowFunction then we use the captured 'this' keyword.
+                    convertedLoopState.containsLexicalThis = true;
+                    return node;
+                }
+                return convertedLoopState.thisName || (convertedLoopState.thisName = ts.createUniqueName("this"));
             }
-            return convertedLoopState.thisName || (convertedLoopState.thisName = ts.createUniqueName("this"));
+            return node;
         }
         function visitIdentifier(node) {
             if (!convertedLoopState) {
@@ -48915,7 +59067,7 @@ var ts;
             if (ts.isGeneratedIdentifier(node)) {
                 return node;
             }
-            if (node.text !== "arguments" && !resolver.isArgumentsLocalBinding(node)) {
+            if (node.text !== "arguments" || !resolver.isArgumentsLocalBinding(node)) {
                 return node;
             }
             return convertedLoopState.argumentsName || (convertedLoopState.argumentsName = ts.createUniqueName("arguments"));
@@ -48926,13 +59078,13 @@ var ts;
                 // it is possible if either
                 //   - break/continue is labeled and label is located inside the converted loop
                 //   - break/continue is non-labeled and located in non-converted loop/switch statement
-                var jump = node.kind === 210 /* BreakStatement */ ? 2 /* Break */ : 4 /* Continue */;
-                var canUseBreakOrContinue = (node.label && convertedLoopState.labels && convertedLoopState.labels[node.label.text]) ||
+                var jump = node.kind === 218 /* BreakStatement */ ? 2 /* Break */ : 4 /* Continue */;
+                var canUseBreakOrContinue = (node.label && convertedLoopState.labels && convertedLoopState.labels.get(node.label.text)) ||
                     (!node.label && (convertedLoopState.allowedNonLabeledJumps & jump));
                 if (!canUseBreakOrContinue) {
                     var labelMarker = void 0;
                     if (!node.label) {
-                        if (node.kind === 210 /* BreakStatement */) {
+                        if (node.kind === 218 /* BreakStatement */) {
                             convertedLoopState.nonLocalJumps |= 2 /* Break */;
                             labelMarker = "break";
                         }
@@ -48943,7 +59095,7 @@ var ts;
                         }
                     }
                     else {
-                        if (node.kind === 210 /* BreakStatement */) {
+                        if (node.kind === 218 /* BreakStatement */) {
                             labelMarker = "break-" + node.label.text;
                             setLabeledJump(convertedLoopState, /*isBreak*/ true, node.label.text, labelMarker);
                         }
@@ -48962,10 +59114,10 @@ var ts;
                                 expr = copyExpr;
                             }
                             else {
-                                expr = ts.createBinary(expr, 24 /* CommaToken */, copyExpr);
+                                expr = ts.createBinary(expr, 26 /* CommaToken */, copyExpr);
                             }
                         }
-                        returnExpression = ts.createBinary(expr, 24 /* CommaToken */, returnExpression);
+                        returnExpression = ts.createBinary(expr, 26 /* CommaToken */, returnExpression);
                     }
                     return ts.createReturn(returnExpression);
                 }
@@ -48987,33 +59139,30 @@ var ts;
             //          }
             //          return C;
             //      }());
-            var modifierFlags = ts.getModifierFlags(node);
-            var isExported = modifierFlags & 1 /* Export */;
-            var isDefault = modifierFlags & 512 /* Default */;
-            // Add an `export` modifier to the statement if needed (for `--target es5 --module es6`)
-            var modifiers = isExported && !isDefault
-                ? ts.filter(node.modifiers, isExportModifier)
-                : undefined;
-            var statement = ts.createVariableStatement(modifiers, ts.createVariableDeclarationList([
-                ts.createVariableDeclaration(getDeclarationName(node, /*allowComments*/ true), 
-                /*type*/ undefined, transformClassLikeDeclarationToExpression(node))
-            ]), 
-            /*location*/ node);
+            var variable = ts.createVariableDeclaration(ts.getLocalName(node, /*allowComments*/ true), 
+            /*type*/ undefined, transformClassLikeDeclarationToExpression(node));
+            ts.setOriginalNode(variable, node);
+            var statements = [];
+            var statement = ts.createVariableStatement(/*modifiers*/ undefined, ts.createVariableDeclarationList([variable]));
             ts.setOriginalNode(statement, node);
+            ts.setTextRange(statement, node);
             ts.startOnNewLine(statement);
+            statements.push(statement);
             // Add an `export default` statement for default exports (for `--target es5 --module es6`)
-            if (isExported && isDefault) {
-                var statements = [statement];
-                statements.push(ts.createExportAssignment(
-                /*decorators*/ undefined, 
-                /*modifiers*/ undefined, 
-                /*isExportEquals*/ false, getDeclarationName(node, /*allowComments*/ false)));
-                return statements;
+            if (ts.hasModifier(node, 1 /* Export */)) {
+                var exportStatement = ts.hasModifier(node, 512 /* Default */)
+                    ? ts.createExportDefault(ts.getLocalName(node))
+                    : ts.createExternalModuleExport(ts.getLocalName(node));
+                ts.setOriginalNode(exportStatement, statement);
+                statements.push(exportStatement);
             }
-            return statement;
-        }
-        function isExportModifier(node) {
-            return node.kind === 82 /* ExportKeyword */;
+            var emitFlags = ts.getEmitFlags(node);
+            if ((emitFlags & 4194304 /* HasEndOfDeclarationMarker */) === 0) {
+                // Add a DeclarationMarker as a marker for the end of the declaration
+                statements.push(ts.createEndOfDeclarationMarker(node));
+                ts.setEmitFlags(statement, emitFlags | 4194304 /* HasEndOfDeclarationMarker */);
+            }
+            return ts.singleOrMany(statements);
         }
         /**
          * Visits a ClassExpression and transforms it into an expression.
@@ -49065,24 +59214,25 @@ var ts;
             }
             var extendsClauseElement = ts.getClassExtendsHeritageClauseElement(node);
             var classFunction = ts.createFunctionExpression(
+            /*modifiers*/ undefined, 
             /*asteriskToken*/ undefined, 
             /*name*/ undefined, 
-            /*typeParameters*/ undefined, extendsClauseElement ? [ts.createParameter("_super")] : [], 
+            /*typeParameters*/ undefined, extendsClauseElement ? [ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, "_super")] : [], 
             /*type*/ undefined, transformClassBody(node, extendsClauseElement));
             // To preserve the behavior of the old emitter, we explicitly indent
             // the body of the function here if it was requested in an earlier
             // transformation.
-            if (ts.getEmitFlags(node) & 524288 /* Indented */) {
-                ts.setEmitFlags(classFunction, 524288 /* Indented */);
+            if (ts.getEmitFlags(node) & 65536 /* Indented */) {
+                ts.setEmitFlags(classFunction, 65536 /* Indented */);
             }
             // "inner" and "outer" below are added purely to preserve source map locations from
             // the old emitter
             var inner = ts.createPartiallyEmittedExpression(classFunction);
             inner.end = node.end;
-            ts.setEmitFlags(inner, 49152 /* NoComments */);
+            ts.setEmitFlags(inner, 1536 /* NoComments */);
             var outer = ts.createPartiallyEmittedExpression(inner);
             outer.end = ts.skipTrivia(currentText, node.pos);
-            ts.setEmitFlags(outer, 49152 /* NoComments */);
+            ts.setEmitFlags(outer, 1536 /* NoComments */);
             return ts.createParen(ts.createCall(outer, 
             /*typeArguments*/ undefined, extendsClauseElement
                 ? [ts.visitNode(extendsClauseElement.expression, visitor, ts.isExpression)]
@@ -49101,20 +59251,20 @@ var ts;
             addConstructor(statements, node, extendsClauseElement);
             addClassMembers(statements, node);
             // Create a synthetic text range for the return statement.
-            var closingBraceLocation = ts.createTokenRange(ts.skipTrivia(currentText, node.members.end), 16 /* CloseBraceToken */);
-            var localName = getLocalName(node);
+            var closingBraceLocation = ts.createTokenRange(ts.skipTrivia(currentText, node.members.end), 18 /* CloseBraceToken */);
+            var localName = ts.getInternalName(node);
             // The following partially-emitted expression exists purely to align our sourcemap
             // emit with the original emitter.
             var outer = ts.createPartiallyEmittedExpression(localName);
             outer.end = closingBraceLocation.end;
-            ts.setEmitFlags(outer, 49152 /* NoComments */);
+            ts.setEmitFlags(outer, 1536 /* NoComments */);
             var statement = ts.createReturn(outer);
             statement.pos = closingBraceLocation.pos;
-            ts.setEmitFlags(statement, 49152 /* NoComments */ | 12288 /* NoTokenSourceMaps */);
+            ts.setEmitFlags(statement, 1536 /* NoComments */ | 384 /* NoTokenSourceMaps */);
             statements.push(statement);
             ts.addRange(statements, endLexicalEnvironment());
-            var block = ts.createBlock(ts.createNodeArray(statements, /*location*/ node.members), /*location*/ undefined, /*multiLine*/ true);
-            ts.setEmitFlags(block, 49152 /* NoComments */);
+            var block = ts.createBlock(ts.setTextRange(ts.createNodeArray(statements), /*location*/ node.members), /*multiLine*/ true);
+            ts.setEmitFlags(block, 1536 /* NoComments */);
             return block;
         }
         /**
@@ -49126,7 +59276,7 @@ var ts;
          */
         function addExtendsHelperIfNeeded(statements, node, extendsClauseElement) {
             if (extendsClauseElement) {
-                statements.push(ts.createStatement(ts.createExtendsHelper(currentSourceFile.externalHelpersModuleName, getDeclarationName(node)), 
+                statements.push(ts.setTextRange(ts.createStatement(createExtendsHelper(context, ts.getLocalName(node))), 
                 /*location*/ extendsClauseElement));
             }
         }
@@ -49138,19 +59288,24 @@ var ts;
          * @param extendsClauseElement The expression for the class `extends` clause.
          */
         function addConstructor(statements, node, extendsClauseElement) {
+            var savedConvertedLoopState = convertedLoopState;
+            convertedLoopState = undefined;
+            var ancestorFacts = enterSubtree(16278 /* ConstructorExcludes */, 73 /* ConstructorIncludes */);
             var constructor = ts.getFirstConstructorWithBody(node);
             var hasSynthesizedSuper = hasSynthesizedDefaultSuperCall(constructor, extendsClauseElement !== undefined);
             var constructorFunction = ts.createFunctionDeclaration(
             /*decorators*/ undefined, 
             /*modifiers*/ undefined, 
-            /*asteriskToken*/ undefined, getDeclarationName(node), 
+            /*asteriskToken*/ undefined, ts.getInternalName(node), 
             /*typeParameters*/ undefined, transformConstructorParameters(constructor, hasSynthesizedSuper), 
-            /*type*/ undefined, transformConstructorBody(constructor, node, extendsClauseElement, hasSynthesizedSuper), 
-            /*location*/ constructor || node);
+            /*type*/ undefined, transformConstructorBody(constructor, node, extendsClauseElement, hasSynthesizedSuper));
+            ts.setTextRange(constructorFunction, constructor || node);
             if (extendsClauseElement) {
-                ts.setEmitFlags(constructorFunction, 256 /* CapturesThis */);
+                ts.setEmitFlags(constructorFunction, 8 /* CapturesThis */);
             }
             statements.push(constructorFunction);
+            exitSubtree(ancestorFacts, 49152 /* PropagateNewTargetMask */, 0 /* None */);
+            convertedLoopState = savedConvertedLoopState;
         }
         /**
          * Transforms the parameters of the constructor declaration of a class.
@@ -49165,10 +59320,8 @@ var ts;
             // `super` call.
             // If this is the case, we do not include the synthetic `...args` parameter and
             // will instead use the `arguments` object in ES5/3.
-            if (constructor && !hasSynthesizedSuper) {
-                return ts.visitNodes(constructor.parameters, visitor, ts.isParameter);
-            }
-            return [];
+            return ts.visitParameterList(constructor && !hasSynthesizedSuper && constructor.parameters, visitor, context)
+                || [];
         }
         /**
          * Transforms the body of a constructor declaration of a class.
@@ -49181,46 +59334,57 @@ var ts;
          */
         function transformConstructorBody(constructor, node, extendsClauseElement, hasSynthesizedSuper) {
             var statements = [];
-            startLexicalEnvironment();
+            resumeLexicalEnvironment();
             var statementOffset = -1;
             if (hasSynthesizedSuper) {
                 // If a super call has already been synthesized,
                 // we're going to assume that we should just transform everything after that.
                 // The assumption is that no prior step in the pipeline has added any prologue directives.
-                statementOffset = 1;
+                statementOffset = 0;
             }
             else if (constructor) {
-                // Otherwise, try to emit all potential prologue directives first.
-                statementOffset = ts.addPrologueDirectives(statements, constructor.body.statements, /*ensureUseStrict*/ false, visitor);
+                statementOffset = ts.addStandardPrologue(statements, constructor.body.statements, /*ensureUseStrict*/ false);
             }
             if (constructor) {
                 addDefaultValueAssignmentsIfNeeded(statements, constructor);
                 addRestParameterIfNeeded(statements, constructor, hasSynthesizedSuper);
+                if (!hasSynthesizedSuper) {
+                    // If no super call has been synthesized, emit custom prologue directives.
+                    statementOffset = ts.addCustomPrologue(statements, constructor.body.statements, statementOffset, visitor);
+                }
                 ts.Debug.assert(statementOffset >= 0, "statementOffset not initialized correctly!");
             }
-            var superCaptureStatus = declareOrCaptureOrReturnThisForConstructorIfNeeded(statements, constructor, !!extendsClauseElement, hasSynthesizedSuper, statementOffset);
+            // determine whether the class is known syntactically to be a derived class (e.g. a
+            // class that extends a value that is not syntactically known to be `null`).
+            var isDerivedClass = extendsClauseElement && ts.skipOuterExpressions(extendsClauseElement.expression).kind !== 95 /* NullKeyword */;
+            var superCaptureStatus = declareOrCaptureOrReturnThisForConstructorIfNeeded(statements, constructor, isDerivedClass, hasSynthesizedSuper, statementOffset);
             // The last statement expression was replaced. Skip it.
             if (superCaptureStatus === 1 /* ReplaceSuperCapture */ || superCaptureStatus === 2 /* ReplaceWithReturn */) {
                 statementOffset++;
             }
             if (constructor) {
-                var body = saveStateAndInvoke(constructor, function (constructor) { return ts.visitNodes(constructor.body.statements, visitor, ts.isStatement, /*start*/ statementOffset); });
-                ts.addRange(statements, body);
+                if (superCaptureStatus === 1 /* ReplaceSuperCapture */) {
+                    hierarchyFacts |= 4096 /* ConstructorWithCapturedSuper */;
+                }
+                ts.addRange(statements, ts.visitNodes(constructor.body.statements, visitor, ts.isStatement, /*start*/ statementOffset));
             }
             // Return `_this` unless we're sure enough that it would be pointless to add a return statement.
             // If there's a constructor that we can tell returns in enough places, then we *do not* want to add a return.
-            if (extendsClauseElement
+            if (isDerivedClass
                 && superCaptureStatus !== 2 /* ReplaceWithReturn */
                 && !(constructor && isSufficientlyCoveredByReturnStatements(constructor.body))) {
                 statements.push(ts.createReturn(ts.createIdentifier("_this")));
             }
             ts.addRange(statements, endLexicalEnvironment());
-            var block = ts.createBlock(ts.createNodeArray(statements, 
+            if (constructor) {
+                prependCaptureNewTargetIfNeeded(statements, constructor, /*copyOnWrite*/ false);
+            }
+            var block = ts.createBlock(ts.setTextRange(ts.createNodeArray(statements), 
             /*location*/ constructor ? constructor.body.statements : node.members), 
-            /*location*/ constructor ? constructor.body : node, 
             /*multiLine*/ true);
+            ts.setTextRange(block, constructor ? constructor.body : node);
             if (!constructor) {
-                ts.setEmitFlags(block, 49152 /* NoComments */);
+                ts.setEmitFlags(block, 1536 /* NoComments */);
             }
             return block;
         }
@@ -49231,17 +59395,17 @@ var ts;
          */
         function isSufficientlyCoveredByReturnStatements(statement) {
             // A return statement is considered covered.
-            if (statement.kind === 211 /* ReturnStatement */) {
+            if (statement.kind === 219 /* ReturnStatement */) {
                 return true;
             }
-            else if (statement.kind === 203 /* IfStatement */) {
+            else if (statement.kind === 211 /* IfStatement */) {
                 var ifStatement = statement;
                 if (ifStatement.elseStatement) {
                     return isSufficientlyCoveredByReturnStatements(ifStatement.thenStatement) &&
                         isSufficientlyCoveredByReturnStatements(ifStatement.elseStatement);
                 }
             }
-            else if (statement.kind === 199 /* Block */) {
+            else if (statement.kind === 207 /* Block */) {
                 var lastStatement = ts.lastOrUndefined(statement.statements);
                 if (lastStatement && isSufficientlyCoveredByReturnStatements(lastStatement)) {
                     return true;
@@ -49254,9 +59418,9 @@ var ts;
          *
          * @returns The new statement offset into the `statements` array.
          */
-        function declareOrCaptureOrReturnThisForConstructorIfNeeded(statements, ctor, hasExtendsClause, hasSynthesizedSuper, statementOffset) {
+        function declareOrCaptureOrReturnThisForConstructorIfNeeded(statements, ctor, isDerivedClass, hasSynthesizedSuper, statementOffset) {
             // If this isn't a derived class, just capture 'this' for arrow functions if necessary.
-            if (!hasExtendsClause) {
+            if (!isDerivedClass) {
                 if (ctor) {
                     addCaptureThisForNodeIfNeeded(statements, ctor);
                 }
@@ -49299,29 +59463,38 @@ var ts;
             var ctorStatements = ctor.body.statements;
             if (statementOffset < ctorStatements.length) {
                 firstStatement = ctorStatements[statementOffset];
-                if (firstStatement.kind === 202 /* ExpressionStatement */ && ts.isSuperCallExpression(firstStatement.expression)) {
-                    var superCall = firstStatement.expression;
-                    superCallExpression = ts.setOriginalNode(saveStateAndInvoke(superCall, visitImmediateSuperCallInBody), superCall);
-                }
-            }
-            // Return the result if we have an immediate super() call on the last statement.
-            if (superCallExpression && statementOffset === ctorStatements.length - 1) {
-                statements.push(ts.createReturn(superCallExpression));
+                if (firstStatement.kind === 210 /* ExpressionStatement */ && ts.isSuperCall(firstStatement.expression)) {
+                    superCallExpression = visitImmediateSuperCallInBody(firstStatement.expression);
+                }
+            }
+            // Return the result if we have an immediate super() call on the last statement,
+            // but only if the constructor itself doesn't use 'this' elsewhere.
+            if (superCallExpression
+                && statementOffset === ctorStatements.length - 1
+                && !(ctor.transformFlags & (16384 /* ContainsLexicalThis */ | 32768 /* ContainsCapturedLexicalThis */))) {
+                var returnStatement = ts.createReturn(superCallExpression);
+                if (superCallExpression.kind !== 194 /* BinaryExpression */
+                    || superCallExpression.left.kind !== 181 /* CallExpression */) {
+                    ts.Debug.fail("Assumed generated super call would have form 'super.call(...) || this'.");
+                }
+                // Shift comments from the original super call to the return statement.
+                ts.setCommentRange(returnStatement, ts.getCommentRange(ts.setEmitFlags(superCallExpression.left, 1536 /* NoComments */)));
+                statements.push(returnStatement);
                 return 2 /* ReplaceWithReturn */;
             }
             // Perform the capture.
-            captureThisForNode(statements, ctor, superCallExpression, firstStatement);
+            captureThisForNode(statements, ctor, superCallExpression || createActualThis(), firstStatement);
             // If we're actually replacing the original statement, we need to signal this to the caller.
             if (superCallExpression) {
                 return 1 /* ReplaceSuperCapture */;
             }
             return 0 /* NoReplacement */;
         }
+        function createActualThis() {
+            return ts.setEmitFlags(ts.createThis(), 4 /* NoSubstitution */);
+        }
         function createDefaultSuperCallOrThis() {
-            var actualThis = ts.createThis();
-            ts.setEmitFlags(actualThis, 128 /* NoSubstitution */);
-            var superCall = ts.createFunctionApply(ts.createIdentifier("_super"), actualThis, ts.createIdentifier("arguments"));
-            return ts.createLogicalOr(superCall, actualThis);
+            return ts.createLogicalOr(ts.createLogicalAnd(ts.createStrictInequality(ts.createIdentifier("_super"), ts.createNull()), ts.createFunctionApply(ts.createIdentifier("_super"), createActualThis(), ts.createIdentifier("arguments"))), createActualThis());
         }
         /**
          * Visits a parameter declaration.
@@ -49336,15 +59509,25 @@ var ts;
             else if (ts.isBindingPattern(node.name)) {
                 // Binding patterns are converted into a generated name and are
                 // evaluated inside the function body.
-                return ts.setOriginalNode(ts.createParameter(ts.getGeneratedNameForNode(node), 
-                /*initializer*/ undefined, 
+                return ts.setOriginalNode(ts.setTextRange(ts.createParameter(
+                /*decorators*/ undefined, 
+                /*modifiers*/ undefined, 
+                /*dotDotDotToken*/ undefined, ts.getGeneratedNameForNode(node), 
+                /*questionToken*/ undefined, 
+                /*type*/ undefined, 
+                /*initializer*/ undefined), 
                 /*location*/ node), 
                 /*original*/ node);
             }
             else if (node.initializer) {
                 // Initializers are elided
-                return ts.setOriginalNode(ts.createParameter(node.name, 
-                /*initializer*/ undefined, 
+                return ts.setOriginalNode(ts.setTextRange(ts.createParameter(
+                /*decorators*/ undefined, 
+                /*modifiers*/ undefined, 
+                /*dotDotDotToken*/ undefined, node.name, 
+                /*questionToken*/ undefined, 
+                /*type*/ undefined, 
+                /*initializer*/ undefined), 
                 /*location*/ node), 
                 /*original*/ node);
             }
@@ -49359,7 +59542,7 @@ var ts;
          * @param node A function-like node.
          */
         function shouldAddDefaultValueAssignments(node) {
-            return (node.transformFlags & 65536 /* ContainsDefaultValueAssignments */) !== 0;
+            return (node.transformFlags & 131072 /* ContainsDefaultValueAssignments */) !== 0;
         }
         /**
          * Adds statements to the body of a function-like node if it contains parameters with
@@ -49374,17 +59557,17 @@ var ts;
             }
             for (var _i = 0, _a = node.parameters; _i < _a.length; _i++) {
                 var parameter = _a[_i];
-                var name_35 = parameter.name, initializer = parameter.initializer, dotDotDotToken = parameter.dotDotDotToken;
+                var name_51 = parameter.name, initializer = parameter.initializer, dotDotDotToken = parameter.dotDotDotToken;
                 // A rest parameter cannot have a binding pattern or an initializer,
                 // so let's just ignore it.
                 if (dotDotDotToken) {
                     continue;
                 }
-                if (ts.isBindingPattern(name_35)) {
-                    addDefaultValueAssignmentForBindingPattern(statements, parameter, name_35, initializer);
+                if (ts.isBindingPattern(name_51)) {
+                    addDefaultValueAssignmentForBindingPattern(statements, parameter, name_51, initializer);
                 }
                 else if (initializer) {
-                    addDefaultValueAssignmentForInitializer(statements, parameter, name_35, initializer);
+                    addDefaultValueAssignmentForInitializer(statements, parameter, name_51, initializer);
                 }
             }
         }
@@ -49403,10 +59586,10 @@ var ts;
             // of an initializer, we must emit that expression to preserve side effects.
             if (name.elements.length > 0) {
                 statements.push(ts.setEmitFlags(ts.createVariableStatement(
-                /*modifiers*/ undefined, ts.createVariableDeclarationList(ts.flattenParameterDestructuring(context, parameter, temp, visitor))), 8388608 /* CustomPrologue */));
+                /*modifiers*/ undefined, ts.createVariableDeclarationList(ts.flattenDestructuringBinding(parameter, visitor, context, 0 /* All */, temp))), 1048576 /* CustomPrologue */));
             }
             else if (initializer) {
-                statements.push(ts.setEmitFlags(ts.createStatement(ts.createAssignment(temp, ts.visitNode(initializer, visitor, ts.isExpression))), 8388608 /* CustomPrologue */));
+                statements.push(ts.setEmitFlags(ts.createStatement(ts.createAssignment(temp, ts.visitNode(initializer, visitor, ts.isExpression))), 1048576 /* CustomPrologue */));
             }
         }
         /**
@@ -49419,14 +59602,12 @@ var ts;
          */
         function addDefaultValueAssignmentForInitializer(statements, parameter, name, initializer) {
             initializer = ts.visitNode(initializer, visitor, ts.isExpression);
-            var statement = ts.createIf(ts.createStrictEquality(ts.getSynthesizedClone(name), ts.createVoidZero()), ts.setEmitFlags(ts.createBlock([
-                ts.createStatement(ts.createAssignment(ts.setEmitFlags(ts.getMutableClone(name), 1536 /* NoSourceMap */), ts.setEmitFlags(initializer, 1536 /* NoSourceMap */ | ts.getEmitFlags(initializer)), 
-                /*location*/ parameter))
-            ], /*location*/ parameter), 32 /* SingleLine */ | 1024 /* NoTrailingSourceMap */ | 12288 /* NoTokenSourceMaps */), 
-            /*elseStatement*/ undefined, 
-            /*location*/ parameter);
+            var statement = ts.createIf(ts.createTypeCheck(ts.getSynthesizedClone(name), "undefined"), ts.setEmitFlags(ts.setTextRange(ts.createBlock([
+                ts.createStatement(ts.setTextRange(ts.createAssignment(ts.setEmitFlags(ts.getMutableClone(name), 48 /* NoSourceMap */), ts.setEmitFlags(initializer, 48 /* NoSourceMap */ | ts.getEmitFlags(initializer))), parameter))
+            ]), parameter), 1 /* SingleLine */ | 32 /* NoTrailingSourceMap */ | 384 /* NoTokenSourceMaps */));
             statement.startsOnNewLine = true;
-            ts.setEmitFlags(statement, 12288 /* NoTokenSourceMaps */ | 1024 /* NoTrailingSourceMap */ | 8388608 /* CustomPrologue */);
+            ts.setTextRange(statement, parameter);
+            ts.setEmitFlags(statement, 384 /* NoTokenSourceMaps */ | 32 /* NoTrailingSourceMap */ | 1048576 /* CustomPrologue */);
             statements.push(statement);
         }
         /**
@@ -49438,7 +59619,7 @@ var ts;
          *                                          synthesized call to `super`
          */
         function shouldAddRestParameter(node, inConstructorWithSynthesizedSuper) {
-            return node && node.dotDotDotToken && node.name.kind === 69 /* Identifier */ && !inConstructorWithSynthesizedSuper;
+            return node && node.dotDotDotToken && node.name.kind === 71 /* Identifier */ && !inConstructorWithSynthesizedSuper;
         }
         /**
          * Adds statements to the body of a function-like node if it contains a rest parameter.
@@ -49456,29 +59637,30 @@ var ts;
             }
             // `declarationName` is the name of the local declaration for the parameter.
             var declarationName = ts.getMutableClone(parameter.name);
-            ts.setEmitFlags(declarationName, 1536 /* NoSourceMap */);
+            ts.setEmitFlags(declarationName, 48 /* NoSourceMap */);
             // `expressionName` is the name of the parameter used in expressions.
             var expressionName = ts.getSynthesizedClone(parameter.name);
             var restIndex = node.parameters.length - 1;
             var temp = ts.createLoopVariable();
             // var param = [];
-            statements.push(ts.setEmitFlags(ts.createVariableStatement(
+            statements.push(ts.setEmitFlags(ts.setTextRange(ts.createVariableStatement(
             /*modifiers*/ undefined, ts.createVariableDeclarationList([
                 ts.createVariableDeclaration(declarationName, 
                 /*type*/ undefined, ts.createArrayLiteral([]))
-            ]), 
-            /*location*/ parameter), 8388608 /* CustomPrologue */));
+            ])), 
+            /*location*/ parameter), 1048576 /* CustomPrologue */));
             // for (var _i = restIndex; _i < arguments.length; _i++) {
             //   param[_i - restIndex] = arguments[_i];
             // }
-            var forStatement = ts.createFor(ts.createVariableDeclarationList([
+            var forStatement = ts.createFor(ts.setTextRange(ts.createVariableDeclarationList([
                 ts.createVariableDeclaration(temp, /*type*/ undefined, ts.createLiteral(restIndex))
-            ], /*location*/ parameter), ts.createLessThan(temp, ts.createPropertyAccess(ts.createIdentifier("arguments"), "length"), 
-            /*location*/ parameter), ts.createPostfixIncrement(temp, /*location*/ parameter), ts.createBlock([
-                ts.startOnNewLine(ts.createStatement(ts.createAssignment(ts.createElementAccess(expressionName, ts.createSubtract(temp, ts.createLiteral(restIndex))), ts.createElementAccess(ts.createIdentifier("arguments"), temp)), 
+            ]), parameter), ts.setTextRange(ts.createLessThan(temp, ts.createPropertyAccess(ts.createIdentifier("arguments"), "length")), parameter), ts.setTextRange(ts.createPostfixIncrement(temp), parameter), ts.createBlock([
+                ts.startOnNewLine(ts.setTextRange(ts.createStatement(ts.createAssignment(ts.createElementAccess(expressionName, restIndex === 0
+                    ? temp
+                    : ts.createSubtract(temp, ts.createLiteral(restIndex))), ts.createElementAccess(ts.createIdentifier("arguments"), temp))), 
                 /*location*/ parameter))
             ]));
-            ts.setEmitFlags(forStatement, 8388608 /* CustomPrologue */);
+            ts.setEmitFlags(forStatement, 1048576 /* CustomPrologue */);
             ts.startOnNewLine(forStatement);
             statements.push(forStatement);
         }
@@ -49489,7 +59671,7 @@ var ts;
          * @param node A node.
          */
         function addCaptureThisForNodeIfNeeded(statements, node) {
-            if (node.transformFlags & 16384 /* ContainsCapturedLexicalThis */ && node.kind !== 180 /* ArrowFunction */) {
+            if (node.transformFlags & 32768 /* ContainsCapturedLexicalThis */ && node.kind !== 187 /* ArrowFunction */) {
                 captureThisForNode(statements, node, ts.createThis());
             }
         }
@@ -49499,11 +59681,52 @@ var ts;
             /*modifiers*/ undefined, ts.createVariableDeclarationList([
                 ts.createVariableDeclaration("_this", 
                 /*type*/ undefined, initializer)
-            ]), originalStatement);
-            ts.setEmitFlags(captureThisStatement, 49152 /* NoComments */ | 8388608 /* CustomPrologue */);
+            ]));
+            ts.setEmitFlags(captureThisStatement, 1536 /* NoComments */ | 1048576 /* CustomPrologue */);
+            ts.setTextRange(captureThisStatement, originalStatement);
             ts.setSourceMapRange(captureThisStatement, node);
             statements.push(captureThisStatement);
         }
+        function prependCaptureNewTargetIfNeeded(statements, node, copyOnWrite) {
+            if (hierarchyFacts & 16384 /* NewTarget */) {
+                var newTarget = void 0;
+                switch (node.kind) {
+                    case 187 /* ArrowFunction */:
+                        return statements;
+                    case 151 /* MethodDeclaration */:
+                    case 153 /* GetAccessor */:
+                    case 154 /* SetAccessor */:
+                        // Methods and accessors cannot be constructors, so 'new.target' will
+                        // always return 'undefined'.
+                        newTarget = ts.createVoidZero();
+                        break;
+                    case 152 /* Constructor */:
+                        // Class constructors can only be called with `new`, so `this.constructor`
+                        // should be relatively safe to use.
+                        newTarget = ts.createPropertyAccess(ts.setEmitFlags(ts.createThis(), 4 /* NoSubstitution */), "constructor");
+                        break;
+                    case 228 /* FunctionDeclaration */:
+                    case 186 /* FunctionExpression */:
+                        // Functions can be called or constructed, and may have a `this` due to
+                        // being a member or when calling an imported function via `other_1.f()`.
+                        newTarget = ts.createConditional(ts.createLogicalAnd(ts.setEmitFlags(ts.createThis(), 4 /* NoSubstitution */), ts.createBinary(ts.setEmitFlags(ts.createThis(), 4 /* NoSubstitution */), 93 /* InstanceOfKeyword */, ts.getLocalName(node))), ts.createPropertyAccess(ts.setEmitFlags(ts.createThis(), 4 /* NoSubstitution */), "constructor"), ts.createVoidZero());
+                        break;
+                    default:
+                        ts.Debug.failBadSyntaxKind(node);
+                        break;
+                }
+                var captureNewTargetStatement = ts.createVariableStatement(
+                /*modifiers*/ undefined, ts.createVariableDeclarationList([
+                    ts.createVariableDeclaration("_newTarget", 
+                    /*type*/ undefined, newTarget)
+                ]));
+                if (copyOnWrite) {
+                    return [captureNewTargetStatement].concat(statements);
+                }
+                statements.unshift(captureNewTargetStatement);
+            }
+            return statements;
+        }
         /**
          * Adds statements to the class body function for a class to define the members of the
          * class.
@@ -49515,20 +59738,20 @@ var ts;
             for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
                 var member = _a[_i];
                 switch (member.kind) {
-                    case 198 /* SemicolonClassElement */:
+                    case 206 /* SemicolonClassElement */:
                         statements.push(transformSemicolonClassElementToStatement(member));
                         break;
-                    case 147 /* MethodDeclaration */:
-                        statements.push(transformClassMethodDeclarationToStatement(getClassMemberPrefix(node, member), member));
+                    case 151 /* MethodDeclaration */:
+                        statements.push(transformClassMethodDeclarationToStatement(getClassMemberPrefix(node, member), member, node));
                         break;
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
+                    case 153 /* GetAccessor */:
+                    case 154 /* SetAccessor */:
                         var accessors = ts.getAllAccessorDeclarations(node.members, member);
                         if (member === accessors.firstAccessor) {
-                            statements.push(transformAccessorsToStatement(getClassMemberPrefix(node, member), accessors));
+                            statements.push(transformAccessorsToStatement(getClassMemberPrefix(node, member), accessors, node));
                         }
                         break;
-                    case 148 /* Constructor */:
+                    case 152 /* Constructor */:
                         // Constructors are handled in visitClassExpression/visitClassDeclaration
                         break;
                     default:
@@ -49543,7 +59766,7 @@ var ts;
          * @param member The SemicolonClassElement node.
          */
         function transformSemicolonClassElementToStatement(member) {
-            return ts.createEmptyStatement(/*location*/ member);
+            return ts.setTextRange(ts.createEmptyStatement(), member);
         }
         /**
          * Transforms a MethodDeclaration into a statement for a class body function.
@@ -49551,21 +59774,23 @@ var ts;
          * @param receiver The receiver for the member.
          * @param member The MethodDeclaration node.
          */
-        function transformClassMethodDeclarationToStatement(receiver, member) {
+        function transformClassMethodDeclarationToStatement(receiver, member, container) {
+            var ancestorFacts = enterSubtree(0 /* None */, 0 /* None */);
             var commentRange = ts.getCommentRange(member);
             var sourceMapRange = ts.getSourceMapRange(member);
-            var func = transformFunctionLikeToExpression(member, /*location*/ member, /*name*/ undefined);
-            ts.setEmitFlags(func, 49152 /* NoComments */);
-            ts.setSourceMapRange(func, sourceMapRange);
-            var statement = ts.createStatement(ts.createAssignment(ts.createMemberAccessForPropertyName(receiver, ts.visitNode(member.name, visitor, ts.isPropertyName), 
-            /*location*/ member.name), func), 
+            var memberName = ts.createMemberAccessForPropertyName(receiver, ts.visitNode(member.name, visitor, ts.isPropertyName), /*location*/ member.name);
+            var memberFunction = transformFunctionLikeToExpression(member, /*location*/ member, /*name*/ undefined, container);
+            ts.setEmitFlags(memberFunction, 1536 /* NoComments */);
+            ts.setSourceMapRange(memberFunction, sourceMapRange);
+            var statement = ts.setTextRange(ts.createStatement(ts.createAssignment(memberName, memberFunction)), 
             /*location*/ member);
             ts.setOriginalNode(statement, member);
             ts.setCommentRange(statement, commentRange);
             // The location for the statement is used to emit comments only.
             // No source map should be emitted for this statement to align with the
             // old emitter.
-            ts.setEmitFlags(statement, 1536 /* NoSourceMap */);
+            ts.setEmitFlags(statement, 48 /* NoSourceMap */);
+            exitSubtree(ancestorFacts, 49152 /* PropagateNewTargetMask */, hierarchyFacts & 49152 /* PropagateNewTargetMask */ ? 16384 /* NewTarget */ : 0 /* None */);
             return statement;
         }
         /**
@@ -49574,13 +59799,13 @@ var ts;
          * @param receiver The receiver for the member.
          * @param accessors The set of related get/set accessors.
          */
-        function transformAccessorsToStatement(receiver, accessors) {
-            var statement = ts.createStatement(transformAccessorsToExpression(receiver, accessors, /*startsOnNewLine*/ false), 
-            /*location*/ ts.getSourceMapRange(accessors.firstAccessor));
+        function transformAccessorsToStatement(receiver, accessors, container) {
+            var statement = ts.createStatement(transformAccessorsToExpression(receiver, accessors, container, /*startsOnNewLine*/ false));
             // The location for the statement is used to emit source maps only.
             // No comments should be emitted for this statement to align with the
             // old emitter.
-            ts.setEmitFlags(statement, 49152 /* NoComments */);
+            ts.setEmitFlags(statement, 1536 /* NoComments */);
+            ts.setSourceMapRange(statement, ts.getSourceMapRange(accessors.firstAccessor));
             return statement;
         }
         /**
@@ -49589,41 +59814,45 @@ var ts;
          *
          * @param receiver The receiver for the member.
          */
-        function transformAccessorsToExpression(receiver, _a, startsOnNewLine) {
+        function transformAccessorsToExpression(receiver, _a, container, startsOnNewLine) {
             var firstAccessor = _a.firstAccessor, getAccessor = _a.getAccessor, setAccessor = _a.setAccessor;
+            var ancestorFacts = enterSubtree(0 /* None */, 0 /* None */);
             // To align with source maps in the old emitter, the receiver and property name
             // arguments are both mapped contiguously to the accessor name.
             var target = ts.getMutableClone(receiver);
-            ts.setEmitFlags(target, 49152 /* NoComments */ | 1024 /* NoTrailingSourceMap */);
+            ts.setEmitFlags(target, 1536 /* NoComments */ | 32 /* NoTrailingSourceMap */);
             ts.setSourceMapRange(target, firstAccessor.name);
             var propertyName = ts.createExpressionForPropertyName(ts.visitNode(firstAccessor.name, visitor, ts.isPropertyName));
-            ts.setEmitFlags(propertyName, 49152 /* NoComments */ | 512 /* NoLeadingSourceMap */);
+            ts.setEmitFlags(propertyName, 1536 /* NoComments */ | 16 /* NoLeadingSourceMap */);
             ts.setSourceMapRange(propertyName, firstAccessor.name);
             var properties = [];
             if (getAccessor) {
-                var getterFunction = transformFunctionLikeToExpression(getAccessor, /*location*/ undefined, /*name*/ undefined);
+                var getterFunction = transformFunctionLikeToExpression(getAccessor, /*location*/ undefined, /*name*/ undefined, container);
                 ts.setSourceMapRange(getterFunction, ts.getSourceMapRange(getAccessor));
+                ts.setEmitFlags(getterFunction, 512 /* NoLeadingComments */);
                 var getter = ts.createPropertyAssignment("get", getterFunction);
                 ts.setCommentRange(getter, ts.getCommentRange(getAccessor));
                 properties.push(getter);
             }
             if (setAccessor) {
-                var setterFunction = transformFunctionLikeToExpression(setAccessor, /*location*/ undefined, /*name*/ undefined);
+                var setterFunction = transformFunctionLikeToExpression(setAccessor, /*location*/ undefined, /*name*/ undefined, container);
                 ts.setSourceMapRange(setterFunction, ts.getSourceMapRange(setAccessor));
+                ts.setEmitFlags(setterFunction, 512 /* NoLeadingComments */);
                 var setter = ts.createPropertyAssignment("set", setterFunction);
                 ts.setCommentRange(setter, ts.getCommentRange(setAccessor));
                 properties.push(setter);
             }
-            properties.push(ts.createPropertyAssignment("enumerable", ts.createLiteral(true)), ts.createPropertyAssignment("configurable", ts.createLiteral(true)));
+            properties.push(ts.createPropertyAssignment("enumerable", ts.createTrue()), ts.createPropertyAssignment("configurable", ts.createTrue()));
             var call = ts.createCall(ts.createPropertyAccess(ts.createIdentifier("Object"), "defineProperty"), 
             /*typeArguments*/ undefined, [
                 target,
                 propertyName,
-                ts.createObjectLiteral(properties, /*location*/ undefined, /*multiLine*/ true)
+                ts.createObjectLiteral(properties, /*multiLine*/ true)
             ]);
             if (startsOnNewLine) {
                 call.startsOnNewLine = true;
             }
+            exitSubtree(ancestorFacts, 49152 /* PropagateNewTargetMask */, hierarchyFacts & 49152 /* PropagateNewTargetMask */ ? 16384 /* NewTarget */ : 0 /* None */);
             return call;
         }
         /**
@@ -49632,11 +59861,23 @@ var ts;
          * @param node An ArrowFunction node.
          */
         function visitArrowFunction(node) {
-            if (node.transformFlags & 8192 /* ContainsLexicalThis */) {
+            if (node.transformFlags & 16384 /* ContainsLexicalThis */) {
                 enableSubstitutionsForCapturedThis();
             }
-            var func = transformFunctionLikeToExpression(node, /*location*/ node, /*name*/ undefined);
-            ts.setEmitFlags(func, 256 /* CapturesThis */);
+            var savedConvertedLoopState = convertedLoopState;
+            convertedLoopState = undefined;
+            var ancestorFacts = enterSubtree(16256 /* ArrowFunctionExcludes */, 66 /* ArrowFunctionIncludes */);
+            var func = ts.createFunctionExpression(
+            /*modifiers*/ undefined, 
+            /*asteriskToken*/ undefined, 
+            /*name*/ undefined, 
+            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
+            /*type*/ undefined, transformFunctionBody(node));
+            ts.setTextRange(func, node);
+            ts.setOriginalNode(func, node);
+            ts.setEmitFlags(func, 8 /* CapturesThis */);
+            exitSubtree(ancestorFacts, 0 /* None */, 0 /* None */);
+            convertedLoopState = savedConvertedLoopState;
             return func;
         }
         /**
@@ -49645,7 +59886,24 @@ var ts;
          * @param node a FunctionExpression node.
          */
         function visitFunctionExpression(node) {
-            return transformFunctionLikeToExpression(node, /*location*/ node, node.name);
+            var ancestorFacts = ts.getEmitFlags(node) & 262144 /* AsyncFunctionBody */
+                ? enterSubtree(16278 /* AsyncFunctionBodyExcludes */, 69 /* AsyncFunctionBodyIncludes */)
+                : enterSubtree(16286 /* FunctionExcludes */, 65 /* FunctionIncludes */);
+            var savedConvertedLoopState = convertedLoopState;
+            convertedLoopState = undefined;
+            var parameters = ts.visitParameterList(node.parameters, visitor, context);
+            var body = node.transformFlags & 64 /* ES2015 */
+                ? transformFunctionBody(node)
+                : visitFunctionBodyDownLevel(node);
+            var name = hierarchyFacts & 16384 /* NewTarget */
+                ? ts.getLocalName(node)
+                : node.name;
+            exitSubtree(ancestorFacts, 49152 /* PropagateNewTargetMask */, 0 /* None */);
+            convertedLoopState = savedConvertedLoopState;
+            return ts.updateFunctionExpression(node, 
+            /*modifiers*/ undefined, node.asteriskToken, name, 
+            /*typeParameters*/ undefined, parameters, 
+            /*type*/ undefined, body);
         }
         /**
          * Visits a FunctionDeclaration node.
@@ -49653,12 +59911,22 @@ var ts;
          * @param node a FunctionDeclaration node.
          */
         function visitFunctionDeclaration(node) {
-            return ts.setOriginalNode(ts.createFunctionDeclaration(
-            /*decorators*/ undefined, node.modifiers, node.asteriskToken, node.name, 
-            /*typeParameters*/ undefined, ts.visitNodes(node.parameters, visitor, ts.isParameter), 
-            /*type*/ undefined, transformFunctionBody(node), 
-            /*location*/ node), 
-            /*original*/ node);
+            var savedConvertedLoopState = convertedLoopState;
+            convertedLoopState = undefined;
+            var ancestorFacts = enterSubtree(16286 /* FunctionExcludes */, 65 /* FunctionIncludes */);
+            var parameters = ts.visitParameterList(node.parameters, visitor, context);
+            var body = node.transformFlags & 64 /* ES2015 */
+                ? transformFunctionBody(node)
+                : visitFunctionBodyDownLevel(node);
+            var name = hierarchyFacts & 16384 /* NewTarget */
+                ? ts.getLocalName(node)
+                : node.name;
+            exitSubtree(ancestorFacts, 49152 /* PropagateNewTargetMask */, 0 /* None */);
+            convertedLoopState = savedConvertedLoopState;
+            return ts.updateFunctionDeclaration(node, 
+            /*decorators*/ undefined, ts.visitNodes(node.modifiers, visitor, ts.isModifier), node.asteriskToken, name, 
+            /*typeParameters*/ undefined, parameters, 
+            /*type*/ undefined, body);
         }
         /**
          * Transforms a function-like node into a FunctionExpression.
@@ -49667,17 +59935,24 @@ var ts;
          * @param location The source-map location for the new FunctionExpression.
          * @param name The name of the new FunctionExpression.
          */
-        function transformFunctionLikeToExpression(node, location, name) {
-            var savedContainingNonArrowFunction = enclosingNonArrowFunction;
-            if (node.kind !== 180 /* ArrowFunction */) {
-                enclosingNonArrowFunction = node;
+        function transformFunctionLikeToExpression(node, location, name, container) {
+            var savedConvertedLoopState = convertedLoopState;
+            convertedLoopState = undefined;
+            var ancestorFacts = container && ts.isClassLike(container) && !ts.hasModifier(node, 32 /* Static */)
+                ? enterSubtree(16286 /* FunctionExcludes */, 65 /* FunctionIncludes */ | 8 /* NonStaticClassElement */)
+                : enterSubtree(16286 /* FunctionExcludes */, 65 /* FunctionIncludes */);
+            var parameters = ts.visitParameterList(node.parameters, visitor, context);
+            var body = transformFunctionBody(node);
+            if (hierarchyFacts & 16384 /* NewTarget */ && !name && (node.kind === 228 /* FunctionDeclaration */ || node.kind === 186 /* FunctionExpression */)) {
+                name = ts.getGeneratedNameForNode(node);
             }
-            var expression = ts.setOriginalNode(ts.createFunctionExpression(node.asteriskToken, name, 
-            /*typeParameters*/ undefined, ts.visitNodes(node.parameters, visitor, ts.isParameter), 
-            /*type*/ undefined, saveStateAndInvoke(node, transformFunctionBody), location), 
+            exitSubtree(ancestorFacts, 49152 /* PropagateNewTargetMask */, 0 /* None */);
+            convertedLoopState = savedConvertedLoopState;
+            return ts.setOriginalNode(ts.setTextRange(ts.createFunctionExpression(
+            /*modifiers*/ undefined, node.asteriskToken, name, 
+            /*typeParameters*/ undefined, parameters, 
+            /*type*/ undefined, body), location), 
             /*original*/ node);
-            enclosingNonArrowFunction = savedContainingNonArrowFunction;
-            return expression;
         }
         /**
          * Transforms the body of a function-like node.
@@ -49692,11 +59967,11 @@ var ts;
             var statements = [];
             var body = node.body;
             var statementOffset;
-            startLexicalEnvironment();
+            resumeLexicalEnvironment();
             if (ts.isBlock(body)) {
                 // ensureUseStrict is false because no new prologue-directive should be added.
-                // addPrologueDirectives will simply put already-existing directives at the beginning of the target statement-array
-                statementOffset = ts.addPrologueDirectives(statements, body.statements, /*ensureUseStrict*/ false, visitor);
+                // addStandardPrologue will put already-existing directives at the beginning of the target statement-array
+                statementOffset = ts.addStandardPrologue(statements, body.statements, /*ensureUseStrict*/ false);
             }
             addCaptureThisForNodeIfNeeded(statements, node);
             addDefaultValueAssignmentsIfNeeded(statements, node);
@@ -49706,6 +59981,8 @@ var ts;
                 multiLine = true;
             }
             if (ts.isBlock(body)) {
+                // addCustomPrologue puts already-existing directives at the beginning of the target statement-array
+                statementOffset = ts.addCustomPrologue(statements, body.statements, statementOffset, visitor);
                 statementsLocation = body.statements;
                 ts.addRange(statements, ts.visitNodes(body.statements, visitor, ts.isStatement, statementOffset));
                 // If the original body was a multi-line block, this must be a multi-line block.
@@ -49714,7 +59991,7 @@ var ts;
                 }
             }
             else {
-                ts.Debug.assert(node.kind === 180 /* ArrowFunction */);
+                ts.Debug.assert(node.kind === 187 /* ArrowFunction */);
                 // To align with the old emitter, we use a synthetic end position on the location
                 // for the statement list we synthesize when we down-level an arrow function with
                 // an expression function body. This prevents both comments and source maps from
@@ -49730,29 +60007,49 @@ var ts;
                     }
                 }
                 var expression = ts.visitNode(body, visitor, ts.isExpression);
-                var returnStatement = ts.createReturn(expression, /*location*/ body);
-                ts.setEmitFlags(returnStatement, 12288 /* NoTokenSourceMaps */ | 1024 /* NoTrailingSourceMap */ | 32768 /* NoTrailingComments */);
+                var returnStatement = ts.createReturn(expression);
+                ts.setTextRange(returnStatement, body);
+                ts.setEmitFlags(returnStatement, 384 /* NoTokenSourceMaps */ | 32 /* NoTrailingSourceMap */ | 1024 /* NoTrailingComments */);
                 statements.push(returnStatement);
                 // To align with the source map emit for the old emitter, we set a custom
                 // source map location for the close brace.
                 closeBraceLocation = body;
             }
-            var lexicalEnvironment = endLexicalEnvironment();
+            var lexicalEnvironment = context.endLexicalEnvironment();
             ts.addRange(statements, lexicalEnvironment);
+            prependCaptureNewTargetIfNeeded(statements, node, /*copyOnWrite*/ false);
             // If we added any final generated statements, this must be a multi-line block
             if (!multiLine && lexicalEnvironment && lexicalEnvironment.length) {
                 multiLine = true;
             }
-            var block = ts.createBlock(ts.createNodeArray(statements, statementsLocation), node.body, multiLine);
+            var block = ts.createBlock(ts.setTextRange(ts.createNodeArray(statements), statementsLocation), multiLine);
+            ts.setTextRange(block, node.body);
             if (!multiLine && singleLine) {
-                ts.setEmitFlags(block, 32 /* SingleLine */);
+                ts.setEmitFlags(block, 1 /* SingleLine */);
             }
             if (closeBraceLocation) {
-                ts.setTokenSourceMapRange(block, 16 /* CloseBraceToken */, closeBraceLocation);
+                ts.setTokenSourceMapRange(block, 18 /* CloseBraceToken */, closeBraceLocation);
             }
             ts.setOriginalNode(block, node.body);
             return block;
         }
+        function visitFunctionBodyDownLevel(node) {
+            var updated = ts.visitFunctionBody(node.body, functionBodyVisitor, context);
+            return ts.updateBlock(updated, ts.setTextRange(ts.createNodeArray(prependCaptureNewTargetIfNeeded(updated.statements, node, /*copyOnWrite*/ true)), 
+            /*location*/ updated.statements));
+        }
+        function visitBlock(node, isFunctionBody) {
+            if (isFunctionBody) {
+                // A function body is not a block scope.
+                return ts.visitEachChild(node, visitor, context);
+            }
+            var ancestorFacts = hierarchyFacts & 256 /* IterationStatement */
+                ? enterSubtree(4032 /* IterationStatementBlockExcludes */, 512 /* IterationStatementBlockIncludes */)
+                : enterSubtree(3904 /* BlockExcludes */, 128 /* BlockIncludes */);
+            var updated = ts.visitEachChild(node, visitor, context);
+            exitSubtree(ancestorFacts, 0 /* None */, 0 /* None */);
+            return updated;
+        }
         /**
          * Visits an ExpressionStatement that contains a destructuring assignment.
          *
@@ -49761,9 +60058,9 @@ var ts;
         function visitExpressionStatement(node) {
             // If we are here it is most likely because our expression is a destructuring assignment.
             switch (node.expression.kind) {
-                case 178 /* ParenthesizedExpression */:
+                case 185 /* ParenthesizedExpression */:
                     return ts.updateStatement(node, visitParenthesizedExpression(node.expression, /*needsDestructuringValue*/ false));
-                case 187 /* BinaryExpression */:
+                case 194 /* BinaryExpression */:
                     return ts.updateStatement(node, visitBinaryExpression(node.expression, /*needsDestructuringValue*/ false));
             }
             return ts.visitEachChild(node, visitor, context);
@@ -49777,14 +60074,15 @@ var ts;
          */
         function visitParenthesizedExpression(node, needsDestructuringValue) {
             // If we are here it is most likely because our expression is a destructuring assignment.
-            if (needsDestructuringValue) {
+            if (!needsDestructuringValue) {
+                // By default we always emit the RHS at the end of a flattened destructuring
+                // expression. If we are in a state where we do not need the destructuring value,
+                // we pass that information along to the children that care about it.
                 switch (node.expression.kind) {
-                    case 178 /* ParenthesizedExpression */:
-                        return ts.createParen(visitParenthesizedExpression(node.expression, /*needsDestructuringValue*/ true), 
-                        /*location*/ node);
-                    case 187 /* BinaryExpression */:
-                        return ts.createParen(visitBinaryExpression(node.expression, /*needsDestructuringValue*/ true), 
-                        /*location*/ node);
+                    case 185 /* ParenthesizedExpression */:
+                        return ts.updateParen(node, visitParenthesizedExpression(node.expression, /*needsDestructuringValue*/ false));
+                    case 194 /* BinaryExpression */:
+                        return ts.updateParen(node, visitBinaryExpression(node.expression, /*needsDestructuringValue*/ false));
                 }
             }
             return ts.visitEachChild(node, visitor, context);
@@ -49798,11 +60096,15 @@ var ts;
          */
         function visitBinaryExpression(node, needsDestructuringValue) {
             // If we are here it is because this is a destructuring assignment.
-            ts.Debug.assert(ts.isDestructuringAssignment(node));
-            return ts.flattenDestructuringAssignment(context, node, needsDestructuringValue, hoistVariableDeclaration, visitor);
+            if (ts.isDestructuringAssignment(node)) {
+                return ts.flattenDestructuringAssignment(node, visitor, context, 0 /* All */, needsDestructuringValue);
+            }
+            return ts.visitEachChild(node, visitor, context);
         }
         function visitVariableStatement(node) {
-            if (convertedLoopState && (ts.getCombinedNodeFlags(node.declarationList) & 3 /* BlockScoped */) == 0) {
+            var ancestorFacts = enterSubtree(0 /* None */, ts.hasModifier(node, 1 /* Export */) ? 32 /* ExportedVariableStatement */ : 0 /* None */);
+            var updated;
+            if (convertedLoopState && (node.declarationList.flags & 3 /* BlockScoped */) === 0) {
                 // we are inside a converted loop - hoist variable declarations
                 var assignments = void 0;
                 for (var _i = 0, _a = node.declarationList.declarations; _i < _a.length; _i++) {
@@ -49811,23 +60113,28 @@ var ts;
                     if (decl.initializer) {
                         var assignment = void 0;
                         if (ts.isBindingPattern(decl.name)) {
-                            assignment = ts.flattenVariableDestructuringToExpression(context, decl, hoistVariableDeclaration, /*nameSubstitution*/ undefined, visitor);
+                            assignment = ts.flattenDestructuringAssignment(decl, visitor, context, 0 /* All */);
                         }
                         else {
-                            assignment = ts.createBinary(decl.name, 56 /* EqualsToken */, decl.initializer);
+                            assignment = ts.createBinary(decl.name, 58 /* EqualsToken */, ts.visitNode(decl.initializer, visitor, ts.isExpression));
+                            ts.setTextRange(assignment, decl);
                         }
-                        (assignments || (assignments = [])).push(assignment);
+                        assignments = ts.append(assignments, assignment);
                     }
                 }
                 if (assignments) {
-                    return ts.createStatement(ts.reduceLeft(assignments, function (acc, v) { return ts.createBinary(v, 24 /* CommaToken */, acc); }), node);
+                    updated = ts.setTextRange(ts.createStatement(ts.inlineExpressions(assignments)), node);
                 }
                 else {
                     // none of declarations has initializer - the entire variable statement can be deleted
-                    return undefined;
+                    updated = undefined;
                 }
             }
-            return ts.visitEachChild(node, visitor, context);
+            else {
+                updated = ts.visitEachChild(node, visitor, context);
+            }
+            exitSubtree(ancestorFacts, 0 /* None */, 0 /* None */);
+            return updated;
         }
         /**
          * Visits a VariableDeclarationList that is block scoped (e.g. `let` or `const`).
@@ -49835,25 +60142,29 @@ var ts;
          * @param node A VariableDeclarationList node.
          */
         function visitVariableDeclarationList(node) {
-            if (node.flags & 3 /* BlockScoped */) {
-                enableSubstitutionsForBlockScopedBindings();
-            }
-            var declarations = ts.flatten(ts.map(node.declarations, node.flags & 1 /* Let */
-                ? visitVariableDeclarationInLetDeclarationList
-                : visitVariableDeclaration));
-            var declarationList = ts.createVariableDeclarationList(declarations, /*location*/ node);
-            ts.setOriginalNode(declarationList, node);
-            ts.setCommentRange(declarationList, node);
-            if (node.transformFlags & 2097152 /* ContainsBindingPattern */
-                && (ts.isBindingPattern(node.declarations[0].name)
-                    || ts.isBindingPattern(ts.lastOrUndefined(node.declarations).name))) {
-                // If the first or last declaration is a binding pattern, we need to modify
-                // the source map range for the declaration list.
-                var firstDeclaration = ts.firstOrUndefined(declarations);
-                var lastDeclaration = ts.lastOrUndefined(declarations);
-                ts.setSourceMapRange(declarationList, ts.createRange(firstDeclaration.pos, lastDeclaration.end));
+            if (node.transformFlags & 64 /* ES2015 */) {
+                if (node.flags & 3 /* BlockScoped */) {
+                    enableSubstitutionsForBlockScopedBindings();
+                }
+                var declarations = ts.flatMap(node.declarations, node.flags & 1 /* Let */
+                    ? visitVariableDeclarationInLetDeclarationList
+                    : visitVariableDeclaration);
+                var declarationList = ts.createVariableDeclarationList(declarations);
+                ts.setOriginalNode(declarationList, node);
+                ts.setTextRange(declarationList, node);
+                ts.setCommentRange(declarationList, node);
+                if (node.transformFlags & 8388608 /* ContainsBindingPattern */
+                    && (ts.isBindingPattern(node.declarations[0].name)
+                        || ts.isBindingPattern(ts.lastOrUndefined(node.declarations).name))) {
+                    // If the first or last declaration is a binding pattern, we need to modify
+                    // the source map range for the declaration list.
+                    var firstDeclaration = ts.firstOrUndefined(declarations);
+                    var lastDeclaration = ts.lastOrUndefined(declarations);
+                    ts.setSourceMapRange(declarationList, ts.createRange(firstDeclaration.pos, lastDeclaration.end));
+                }
+                return declarationList;
             }
-            return declarationList;
+            return ts.visitEachChild(node, visitor, context);
         }
         /**
          * Gets a value indicating whether we should emit an explicit initializer for a variable
@@ -49904,18 +60215,16 @@ var ts;
             var flags = resolver.getNodeCheckFlags(node);
             var isCapturedInFunction = flags & 131072 /* CapturedBlockScopedBinding */;
             var isDeclaredInLoop = flags & 262144 /* BlockScopedBindingInLoop */;
-            var emittedAsTopLevel = ts.isBlockScopedContainerTopLevel(enclosingBlockScopeContainer)
+            var emittedAsTopLevel = (hierarchyFacts & 64 /* TopLevel */) !== 0
                 || (isCapturedInFunction
                     && isDeclaredInLoop
-                    && ts.isBlock(enclosingBlockScopeContainer)
-                    && ts.isIterationStatement(enclosingBlockScopeContainerParent, /*lookInLabeledStatements*/ false));
+                    && (hierarchyFacts & 512 /* IterationStatementBlock */) !== 0);
             var emitExplicitInitializer = !emittedAsTopLevel
-                && enclosingBlockScopeContainer.kind !== 207 /* ForInStatement */
-                && enclosingBlockScopeContainer.kind !== 208 /* ForOfStatement */
+                && (hierarchyFacts & 2048 /* ForInOrForOfStatement */) === 0
                 && (!resolver.isDeclarationWithCollidingName(node)
                     || (isDeclaredInLoop
                         && !isCapturedInFunction
-                        && !ts.isIterationStatement(enclosingBlockScopeContainer, /*lookInLabeledStatements*/ false)));
+                        && (hierarchyFacts & (1024 /* ForStatement */ | 2048 /* ForInOrForOfStatement */)) === 0));
             return emitExplicitInitializer;
         }
         /**
@@ -49932,9 +60241,9 @@ var ts;
                 return visitVariableDeclaration(node);
             }
             if (!node.initializer && shouldEmitExplicitInitializerForLetDeclaration(node)) {
-                var clone_5 = ts.getMutableClone(node);
-                clone_5.initializer = ts.createVoidZero();
-                return clone_5;
+                var clone_2 = ts.getMutableClone(node);
+                clone_2.initializer = ts.createVoidZero();
+                return clone_2;
             }
             return ts.visitEachChild(node, visitor, context);
         }
@@ -49944,99 +60253,77 @@ var ts;
          * @param node A VariableDeclaration node.
          */
         function visitVariableDeclaration(node) {
-            // If we are here it is because the name contains a binding pattern.
+            var ancestorFacts = enterSubtree(32 /* ExportedVariableStatement */, 0 /* None */);
+            var updated;
             if (ts.isBindingPattern(node.name)) {
-                var recordTempVariablesInLine = !enclosingVariableStatement
-                    || !ts.hasModifier(enclosingVariableStatement, 1 /* Export */);
-                return ts.flattenVariableDestructuring(context, node, /*value*/ undefined, visitor, recordTempVariablesInLine ? undefined : hoistVariableDeclaration);
-            }
-            return ts.visitEachChild(node, visitor, context);
-        }
-        function visitLabeledStatement(node) {
-            if (convertedLoopState) {
-                if (!convertedLoopState.labels) {
-                    convertedLoopState.labels = ts.createMap();
-                }
-                convertedLoopState.labels[node.label.text] = node.label.text;
-            }
-            var result;
-            if (ts.isIterationStatement(node.statement, /*lookInLabeledStatements*/ false) && shouldConvertIterationStatementBody(node.statement)) {
-                result = ts.visitNodes(ts.createNodeArray([node.statement]), visitor, ts.isStatement);
+                updated = ts.flattenDestructuringBinding(node, visitor, context, 0 /* All */, 
+                /*value*/ undefined, (ancestorFacts & 32 /* ExportedVariableStatement */) !== 0);
             }
             else {
-                result = ts.visitEachChild(node, visitor, context);
+                updated = ts.visitEachChild(node, visitor, context);
             }
-            if (convertedLoopState) {
-                convertedLoopState.labels[node.label.text] = undefined;
+            exitSubtree(ancestorFacts, 0 /* None */, 0 /* None */);
+            return updated;
+        }
+        function recordLabel(node) {
+            convertedLoopState.labels.set(node.label.text, node.label.text);
+        }
+        function resetLabel(node) {
+            convertedLoopState.labels.set(node.label.text, undefined);
+        }
+        function visitLabeledStatement(node) {
+            if (convertedLoopState && !convertedLoopState.labels) {
+                convertedLoopState.labels = ts.createMap();
             }
-            return result;
+            var statement = ts.unwrapInnermostStatementOfLabel(node, convertedLoopState && recordLabel);
+            return ts.isIterationStatement(statement, /*lookInLabeledStatements*/ false)
+                ? visitIterationStatement(statement, /*outermostLabeledStatement*/ node)
+                : ts.restoreEnclosingLabel(ts.visitNode(statement, visitor, ts.isStatement), node, convertedLoopState && resetLabel);
         }
-        function visitDoStatement(node) {
-            return convertIterationStatementBodyIfNecessary(node);
+        function visitIterationStatement(node, outermostLabeledStatement) {
+            switch (node.kind) {
+                case 212 /* DoStatement */:
+                case 213 /* WhileStatement */:
+                    return visitDoOrWhileStatement(node, outermostLabeledStatement);
+                case 214 /* ForStatement */:
+                    return visitForStatement(node, outermostLabeledStatement);
+                case 215 /* ForInStatement */:
+                    return visitForInStatement(node, outermostLabeledStatement);
+                case 216 /* ForOfStatement */:
+                    return visitForOfStatement(node, outermostLabeledStatement);
+            }
+        }
+        function visitIterationStatementWithFacts(excludeFacts, includeFacts, node, outermostLabeledStatement, convert) {
+            var ancestorFacts = enterSubtree(excludeFacts, includeFacts);
+            var updated = convertIterationStatementBodyIfNecessary(node, outermostLabeledStatement, convert);
+            exitSubtree(ancestorFacts, 0 /* None */, 0 /* None */);
+            return updated;
         }
-        function visitWhileStatement(node) {
-            return convertIterationStatementBodyIfNecessary(node);
+        function visitDoOrWhileStatement(node, outermostLabeledStatement) {
+            return visitIterationStatementWithFacts(0 /* DoOrWhileStatementExcludes */, 256 /* DoOrWhileStatementIncludes */, node, outermostLabeledStatement);
         }
-        function visitForStatement(node) {
-            return convertIterationStatementBodyIfNecessary(node);
+        function visitForStatement(node, outermostLabeledStatement) {
+            return visitIterationStatementWithFacts(3008 /* ForStatementExcludes */, 1280 /* ForStatementIncludes */, node, outermostLabeledStatement);
         }
-        function visitForInStatement(node) {
-            return convertIterationStatementBodyIfNecessary(node);
+        function visitForInStatement(node, outermostLabeledStatement) {
+            return visitIterationStatementWithFacts(1984 /* ForInOrForOfStatementExcludes */, 2304 /* ForInOrForOfStatementIncludes */, node, outermostLabeledStatement);
         }
-        /**
-         * Visits a ForOfStatement and converts it into a compatible ForStatement.
-         *
-         * @param node A ForOfStatement.
-         */
-        function visitForOfStatement(node) {
-            return convertIterationStatementBodyIfNecessary(node, convertForOfToFor);
+        function visitForOfStatement(node, outermostLabeledStatement) {
+            return visitIterationStatementWithFacts(1984 /* ForInOrForOfStatementExcludes */, 2304 /* ForInOrForOfStatementIncludes */, node, outermostLabeledStatement, compilerOptions.downlevelIteration ? convertForOfStatementForIterable : convertForOfStatementForArray);
         }
-        function convertForOfToFor(node, convertedLoopBodyStatements) {
-            // The following ES6 code:
-            //
-            //    for (let v of expr) { }
-            //
-            // should be emitted as
-            //
-            //    for (var _i = 0, _a = expr; _i < _a.length; _i++) {
-            //        var v = _a[_i];
-            //    }
-            //
-            // where _a and _i are temps emitted to capture the RHS and the counter,
-            // respectively.
-            // When the left hand side is an expression instead of a let declaration,
-            // the "let v" is not emitted.
-            // When the left hand side is a let/const, the v is renamed if there is
-            // another v in scope.
-            // Note that all assignments to the LHS are emitted in the body, including
-            // all destructuring.
-            // Note also that because an extra statement is needed to assign to the LHS,
-            // for-of bodies are always emitted as blocks.
-            var expression = ts.visitNode(node.expression, visitor, ts.isExpression);
-            var initializer = node.initializer;
+        function convertForOfStatementHead(node, boundValue, convertedLoopBodyStatements) {
             var statements = [];
-            // In the case where the user wrote an identifier as the RHS, like this:
-            //
-            //     for (let v of arr) { }
-            //
-            // we don't want to emit a temporary variable for the RHS, just use it directly.
-            var counter = ts.createLoopVariable();
-            var rhsReference = expression.kind === 69 /* Identifier */
-                ? ts.createUniqueName(expression.text)
-                : ts.createTempVariable(/*recordTempVariable*/ undefined);
-            // Initialize LHS
-            // var v = _a[_i];
-            if (ts.isVariableDeclarationList(initializer)) {
-                if (initializer.flags & 3 /* BlockScoped */) {
+            if (ts.isVariableDeclarationList(node.initializer)) {
+                if (node.initializer.flags & 3 /* BlockScoped */) {
                     enableSubstitutionsForBlockScopedBindings();
                 }
-                var firstOriginalDeclaration = ts.firstOrUndefined(initializer.declarations);
+                var firstOriginalDeclaration = ts.firstOrUndefined(node.initializer.declarations);
                 if (firstOriginalDeclaration && ts.isBindingPattern(firstOriginalDeclaration.name)) {
                     // This works whether the declaration is a var, let, or const.
                     // It will use rhsIterationValue _a[_i] as the initializer.
-                    var declarations = ts.flattenVariableDestructuring(context, firstOriginalDeclaration, ts.createElementAccess(rhsReference, counter), visitor);
-                    var declarationList = ts.createVariableDeclarationList(declarations, /*location*/ initializer);
-                    ts.setOriginalNode(declarationList, initializer);
+                    var declarations = ts.flattenDestructuringBinding(firstOriginalDeclaration, visitor, context, 0 /* All */, boundValue);
+                    var declarationList = ts.setTextRange(ts.createVariableDeclarationList(declarations), node.initializer);
+                    ts.setOriginalNode(declarationList, node.initializer);
                     // Adjust the source map range for the first declaration to align with the old
                     // emitter.
                     var firstDeclaration = declarations[0];
@@ -50048,28 +60335,24 @@ var ts;
                 else {
                     // The following call does not include the initializer, so we have
                     // to emit it separately.
-                    statements.push(ts.createVariableStatement(
-                    /*modifiers*/ undefined, ts.createVariableDeclarationList([
+                    statements.push(ts.setTextRange(ts.createVariableStatement(
+                    /*modifiers*/ undefined, ts.setOriginalNode(ts.setTextRange(ts.createVariableDeclarationList([
                         ts.createVariableDeclaration(firstOriginalDeclaration ? firstOriginalDeclaration.name : ts.createTempVariable(/*recordTempVariable*/ undefined), 
-                        /*type*/ undefined, ts.createElementAccess(rhsReference, counter))
-                    ], /*location*/ ts.moveRangePos(initializer, -1)), 
-                    /*location*/ ts.moveRangeEnd(initializer, -1)));
+                        /*type*/ undefined, boundValue)
+                    ]), ts.moveRangePos(node.initializer, -1)), node.initializer)), ts.moveRangeEnd(node.initializer, -1)));
                 }
             }
             else {
                 // Initializer is an expression. Emit the expression in the body, so that it's
                 // evaluated on every iteration.
-                var assignment = ts.createAssignment(initializer, ts.createElementAccess(rhsReference, counter));
+                var assignment = ts.createAssignment(node.initializer, boundValue);
                 if (ts.isDestructuringAssignment(assignment)) {
-                    // This is a destructuring pattern, so we flatten the destructuring instead.
-                    statements.push(ts.createStatement(ts.flattenDestructuringAssignment(context, assignment, 
-                    /*needsValue*/ false, hoistVariableDeclaration, visitor)));
+                    ts.aggregateTransformFlags(assignment);
+                    statements.push(ts.createStatement(visitBinaryExpression(assignment, /*needsDestructuringValue*/ false)));
                 }
                 else {
-                    // Currently there is not way to check that assignment is binary expression of destructing assignment
-                    // so we have to cast never type to binaryExpression
-                    assignment.end = initializer.end;
-                    statements.push(ts.createStatement(assignment, /*location*/ ts.moveRangeEnd(initializer, -1)));
+                    assignment.end = node.initializer.end;
+                    statements.push(ts.setTextRange(ts.createStatement(ts.visitNode(assignment, visitor, ts.isExpression)), ts.moveRangeEnd(node.initializer, -1)));
                 }
             }
             var bodyLocation;
@@ -50078,7 +60361,7 @@ var ts;
                 ts.addRange(statements, convertedLoopBodyStatements);
             }
             else {
-                var statement = ts.visitNode(node.statement, visitor, ts.isStatement);
+                var statement = ts.visitNode(node.statement, visitor, ts.isStatement, ts.liftToBlock);
                 if (ts.isBlock(statement)) {
                     ts.addRange(statements, statement.statements);
                     bodyLocation = statement;
@@ -50088,22 +60371,92 @@ var ts;
                     statements.push(statement);
                 }
             }
-            // The old emitter does not emit source maps for the expression
-            ts.setEmitFlags(expression, 1536 /* NoSourceMap */ | ts.getEmitFlags(expression));
             // The old emitter does not emit source maps for the block.
             // We add the location to preserve comments.
-            var body = ts.createBlock(ts.createNodeArray(statements, /*location*/ statementsLocation), 
-            /*location*/ bodyLocation);
-            ts.setEmitFlags(body, 1536 /* NoSourceMap */ | 12288 /* NoTokenSourceMaps */);
-            var forStatement = ts.createFor(ts.createVariableDeclarationList([
-                ts.createVariableDeclaration(counter, /*type*/ undefined, ts.createLiteral(0), /*location*/ ts.moveRangePos(node.expression, -1)),
-                ts.createVariableDeclaration(rhsReference, /*type*/ undefined, expression, /*location*/ node.expression)
-            ], /*location*/ node.expression), ts.createLessThan(counter, ts.createPropertyAccess(rhsReference, "length"), 
-            /*location*/ node.expression), ts.createPostfixIncrement(counter, /*location*/ node.expression), body, 
+            return ts.setEmitFlags(ts.setTextRange(ts.createBlock(ts.setTextRange(ts.createNodeArray(statements), statementsLocation), 
+            /*multiLine*/ true), bodyLocation), 48 /* NoSourceMap */ | 384 /* NoTokenSourceMaps */);
+        }
+        function convertForOfStatementForArray(node, outermostLabeledStatement, convertedLoopBodyStatements) {
+            // The following ES6 code:
+            //
+            //    for (let v of expr) { }
+            //
+            // should be emitted as
+            //
+            //    for (var _i = 0, _a = expr; _i < _a.length; _i++) {
+            //        var v = _a[_i];
+            //    }
+            //
+            // where _a and _i are temps emitted to capture the RHS and the counter,
+            // respectively.
+            // When the left hand side is an expression instead of a let declaration,
+            // the "let v" is not emitted.
+            // When the left hand side is a let/const, the v is renamed if there is
+            // another v in scope.
+            // Note that all assignments to the LHS are emitted in the body, including
+            // all destructuring.
+            // Note also that because an extra statement is needed to assign to the LHS,
+            // for-of bodies are always emitted as blocks.
+            var expression = ts.visitNode(node.expression, visitor, ts.isExpression);
+            // In the case where the user wrote an identifier as the RHS, like this:
+            //
+            //     for (let v of arr) { }
+            //
+            // we don't want to emit a temporary variable for the RHS, just use it directly.
+            var counter = ts.createLoopVariable();
+            var rhsReference = ts.isIdentifier(expression) ? ts.getGeneratedNameForNode(expression) : ts.createTempVariable(/*recordTempVariable*/ undefined);
+            // The old emitter does not emit source maps for the expression
+            ts.setEmitFlags(expression, 48 /* NoSourceMap */ | ts.getEmitFlags(expression));
+            var forStatement = ts.setTextRange(ts.createFor(
+            /*initializer*/ ts.setEmitFlags(ts.setTextRange(ts.createVariableDeclarationList([
+                ts.setTextRange(ts.createVariableDeclaration(counter, /*type*/ undefined, ts.createLiteral(0)), ts.moveRangePos(node.expression, -1)),
+                ts.setTextRange(ts.createVariableDeclaration(rhsReference, /*type*/ undefined, expression), node.expression)
+            ]), node.expression), 2097152 /* NoHoisting */), 
+            /*condition*/ ts.setTextRange(ts.createLessThan(counter, ts.createPropertyAccess(rhsReference, "length")), node.expression), 
+            /*incrementor*/ ts.setTextRange(ts.createPostfixIncrement(counter), node.expression), 
+            /*statement*/ convertForOfStatementHead(node, ts.createElementAccess(rhsReference, counter), convertedLoopBodyStatements)), 
             /*location*/ node);
             // Disable trailing source maps for the OpenParenToken to align source map emit with the old emitter.
-            ts.setEmitFlags(forStatement, 8192 /* NoTokenTrailingSourceMaps */);
-            return forStatement;
+            ts.setEmitFlags(forStatement, 256 /* NoTokenTrailingSourceMaps */);
+            ts.setTextRange(forStatement, node);
+            return ts.restoreEnclosingLabel(forStatement, outermostLabeledStatement, convertedLoopState && resetLabel);
+        }
+        function convertForOfStatementForIterable(node, outermostLabeledStatement, convertedLoopBodyStatements) {
+            var expression = ts.visitNode(node.expression, visitor, ts.isExpression);
+            var iterator = ts.isIdentifier(expression) ? ts.getGeneratedNameForNode(expression) : ts.createTempVariable(/*recordTempVariable*/ undefined);
+            var result = ts.isIdentifier(expression) ? ts.getGeneratedNameForNode(iterator) : ts.createTempVariable(/*recordTempVariable*/ undefined);
+            var errorRecord = ts.createUniqueName("e");
+            var catchVariable = ts.getGeneratedNameForNode(errorRecord);
+            var returnMethod = ts.createTempVariable(/*recordTempVariable*/ undefined);
+            var values = ts.createValuesHelper(context, expression, node.expression);
+            var next = ts.createCall(ts.createPropertyAccess(iterator, "next"), /*typeArguments*/ undefined, []);
+            hoistVariableDeclaration(errorRecord);
+            hoistVariableDeclaration(returnMethod);
+            var forStatement = ts.setEmitFlags(ts.setTextRange(ts.createFor(
+            /*initializer*/ ts.setEmitFlags(ts.setTextRange(ts.createVariableDeclarationList([
+                ts.setTextRange(ts.createVariableDeclaration(iterator, /*type*/ undefined, values), node.expression),
+                ts.createVariableDeclaration(result, /*type*/ undefined, next)
+            ]), node.expression), 2097152 /* NoHoisting */), 
+            /*condition*/ ts.createLogicalNot(ts.createPropertyAccess(result, "done")), 
+            /*incrementor*/ ts.createAssignment(result, next), 
+            /*statement*/ convertForOfStatementHead(node, ts.createPropertyAccess(result, "value"), convertedLoopBodyStatements)), 
+            /*location*/ node), 256 /* NoTokenTrailingSourceMaps */);
+            return ts.createTry(ts.createBlock([
+                ts.restoreEnclosingLabel(forStatement, outermostLabeledStatement, convertedLoopState && resetLabel)
+            ]), ts.createCatchClause(ts.createVariableDeclaration(catchVariable), ts.setEmitFlags(ts.createBlock([
+                ts.createStatement(ts.createAssignment(errorRecord, ts.createObjectLiteral([
+                    ts.createPropertyAssignment("error", catchVariable)
+                ])))
+            ]), 1 /* SingleLine */)), ts.createBlock([
+                ts.createTry(
+                /*tryBlock*/ ts.createBlock([
+                    ts.setEmitFlags(ts.createIf(ts.createLogicalAnd(ts.createLogicalAnd(result, ts.createLogicalNot(ts.createPropertyAccess(result, "done"))), ts.createAssignment(returnMethod, ts.createPropertyAccess(iterator, "return"))), ts.createStatement(ts.createFunctionCall(returnMethod, iterator, []))), 1 /* SingleLine */),
+                ]), 
+                /*catchClause*/ undefined, 
+                /*finallyBlock*/ ts.setEmitFlags(ts.createBlock([
+                    ts.setEmitFlags(ts.createIf(errorRecord, ts.createThrow(ts.createPropertyAccess(errorRecord, "error"))), 1 /* SingleLine */)
+                ]), 1 /* SingleLine */))
+            ]));
         }
         /**
          * Visits an ObjectLiteralExpression with computed propety names.
@@ -50117,31 +60470,39 @@ var ts;
             // Find the first computed property.
             // Everything until that point can be emitted as part of the initial object literal.
             var numInitialProperties = numProperties;
+            var numInitialPropertiesWithoutYield = numProperties;
             for (var i = 0; i < numProperties; i++) {
                 var property = properties[i];
-                if (property.transformFlags & 4194304 /* ContainsYield */
-                    || property.name.kind === 140 /* ComputedPropertyName */) {
+                if ((property.transformFlags & 16777216 /* ContainsYield */ && hierarchyFacts & 4 /* AsyncFunctionBody */)
+                    && i < numInitialPropertiesWithoutYield) {
+                    numInitialPropertiesWithoutYield = i;
+                }
+                if (property.name.kind === 144 /* ComputedPropertyName */) {
                     numInitialProperties = i;
                     break;
                 }
             }
-            ts.Debug.assert(numInitialProperties !== numProperties);
-            // For computed properties, we need to create a unique handle to the object
-            // literal so we can modify it without risking internal assignments tainting the object.
-            var temp = ts.createTempVariable(hoistVariableDeclaration);
-            // Write out the first non-computed properties, then emit the rest through indexing on the temp variable.
-            var expressions = [];
-            var assignment = ts.createAssignment(temp, ts.setEmitFlags(ts.createObjectLiteral(ts.visitNodes(properties, visitor, ts.isObjectLiteralElementLike, 0, numInitialProperties), 
-            /*location*/ undefined, node.multiLine), 524288 /* Indented */));
-            if (node.multiLine) {
-                assignment.startsOnNewLine = true;
-            }
-            expressions.push(assignment);
-            addObjectLiteralMembers(expressions, node, temp, numInitialProperties);
-            // We need to clone the temporary identifier so that we can write it on a
-            // new line
-            expressions.push(node.multiLine ? ts.startOnNewLine(ts.getMutableClone(temp)) : temp);
-            return ts.inlineExpressions(expressions);
+            if (numInitialProperties !== numProperties) {
+                if (numInitialPropertiesWithoutYield < numInitialProperties) {
+                    numInitialProperties = numInitialPropertiesWithoutYield;
+                }
+                // For computed properties, we need to create a unique handle to the object
+                // literal so we can modify it without risking internal assignments tainting the object.
+                var temp = ts.createTempVariable(hoistVariableDeclaration);
+                // Write out the first non-computed properties, then emit the rest through indexing on the temp variable.
+                var expressions = [];
+                var assignment = ts.createAssignment(temp, ts.setEmitFlags(ts.createObjectLiteral(ts.visitNodes(properties, visitor, ts.isObjectLiteralElementLike, 0, numInitialProperties), node.multiLine), 65536 /* Indented */));
+                if (node.multiLine) {
+                    assignment.startsOnNewLine = true;
+                }
+                expressions.push(assignment);
+                addObjectLiteralMembers(expressions, node, temp, numInitialProperties);
+                // We need to clone the temporary identifier so that we can write it on a
+                // new line
+                expressions.push(node.multiLine ? ts.startOnNewLine(ts.getMutableClone(temp)) : temp);
+                return ts.inlineExpressions(expressions);
+            }
+            return ts.visitEachChild(node, visitor, context);
         }
         function shouldConvertIterationStatementBody(node) {
             return (resolver.getNodeCheckFlags(node) & 65536 /* LoopWithCapturedBlockScopedBinding */) !== 0;
@@ -50155,7 +60516,7 @@ var ts;
             }
             visit(node.name);
             function visit(node) {
-                if (node.kind === 69 /* Identifier */) {
+                if (node.kind === 71 /* Identifier */) {
                     state.hoistedLocalVariables.push(node);
                 }
                 else {
@@ -50168,7 +60529,7 @@ var ts;
                 }
             }
         }
-        function convertIterationStatementBodyIfNecessary(node, convert) {
+        function convertIterationStatementBodyIfNecessary(node, outermostLabeledStatement, convert) {
             if (!shouldConvertIterationStatementBody(node)) {
                 var saveAllowedNonLabeledJumps = void 0;
                 if (convertedLoopState) {
@@ -50177,7 +60538,9 @@ var ts;
                     saveAllowedNonLabeledJumps = convertedLoopState.allowedNonLabeledJumps;
                     convertedLoopState.allowedNonLabeledJumps = 2 /* Break */ | 4 /* Continue */;
                 }
-                var result = convert ? convert(node, /*convertedLoopBodyStatements*/ undefined) : ts.visitEachChild(node, visitor, context);
+                var result = convert
+                    ? convert(node, outermostLabeledStatement, /*convertedLoopBodyStatements*/ undefined)
+                    : ts.restoreEnclosingLabel(ts.visitEachChild(node, visitor, context), outermostLabeledStatement, convertedLoopState && resetLabel);
                 if (convertedLoopState) {
                     convertedLoopState.allowedNonLabeledJumps = saveAllowedNonLabeledJumps;
                 }
@@ -50186,11 +60549,11 @@ var ts;
             var functionName = ts.createUniqueName("_loop");
             var loopInitializer;
             switch (node.kind) {
-                case 206 /* ForStatement */:
-                case 207 /* ForInStatement */:
-                case 208 /* ForOfStatement */:
+                case 214 /* ForStatement */:
+                case 215 /* ForInStatement */:
+                case 216 /* ForOfStatement */:
                     var initializer = node.initializer;
-                    if (initializer && initializer.kind === 219 /* VariableDeclarationList */) {
+                    if (initializer && initializer.kind === 227 /* VariableDeclarationList */) {
                         loopInitializer = initializer;
                     }
                     break;
@@ -50226,35 +60589,43 @@ var ts;
                     convertedLoopState.hoistedLocalVariables = outerConvertedLoopState.hoistedLocalVariables;
                 }
             }
-            var loopBody = ts.visitNode(node.statement, visitor, ts.isStatement);
+            startLexicalEnvironment();
+            var loopBody = ts.visitNode(node.statement, visitor, ts.isStatement, ts.liftToBlock);
+            var lexicalEnvironment = endLexicalEnvironment();
             var currentState = convertedLoopState;
             convertedLoopState = outerConvertedLoopState;
-            if (loopOutParameters.length) {
-                var statements_3 = ts.isBlock(loopBody) ? loopBody.statements.slice() : [loopBody];
-                copyOutParameters(loopOutParameters, 1 /* ToOutParameter */, statements_3);
-                loopBody = ts.createBlock(statements_3, /*location*/ undefined, /*multiline*/ true);
+            if (loopOutParameters.length || lexicalEnvironment) {
+                var statements_4 = ts.isBlock(loopBody) ? loopBody.statements.slice() : [loopBody];
+                if (loopOutParameters.length) {
+                    copyOutParameters(loopOutParameters, 1 /* ToOutParameter */, statements_4);
+                }
+                ts.addRange(statements_4, lexicalEnvironment);
+                loopBody = ts.createBlock(statements_4, /*multiline*/ true);
+            }
+            if (ts.isBlock(loopBody)) {
+                loopBody.multiLine = true;
             }
-            if (!ts.isBlock(loopBody)) {
-                loopBody = ts.createBlock([loopBody], /*location*/ undefined, /*multiline*/ true);
+            else {
+                loopBody = ts.createBlock([loopBody], /*multiline*/ true);
             }
-            var isAsyncBlockContainingAwait = enclosingNonArrowFunction
-                && (ts.getEmitFlags(enclosingNonArrowFunction) & 2097152 /* AsyncFunctionBody */) !== 0
-                && (node.statement.transformFlags & 4194304 /* ContainsYield */) !== 0;
+            var containsYield = (node.statement.transformFlags & 16777216 /* ContainsYield */) !== 0;
+            var isAsyncBlockContainingAwait = containsYield && (hierarchyFacts & 4 /* AsyncFunctionBody */) !== 0;
             var loopBodyFlags = 0;
             if (currentState.containsLexicalThis) {
-                loopBodyFlags |= 256 /* CapturesThis */;
+                loopBodyFlags |= 8 /* CapturesThis */;
             }
             if (isAsyncBlockContainingAwait) {
-                loopBodyFlags |= 2097152 /* AsyncFunctionBody */;
+                loopBodyFlags |= 262144 /* AsyncFunctionBody */;
             }
             var convertedLoopVariable = ts.createVariableStatement(
-            /*modifiers*/ undefined, ts.createVariableDeclarationList([
+            /*modifiers*/ undefined, ts.setEmitFlags(ts.createVariableDeclarationList([
                 ts.createVariableDeclaration(functionName, 
-                /*type*/ undefined, ts.setEmitFlags(ts.createFunctionExpression(isAsyncBlockContainingAwait ? ts.createToken(37 /* AsteriskToken */) : undefined, 
+                /*type*/ undefined, ts.setEmitFlags(ts.createFunctionExpression(
+                /*modifiers*/ undefined, containsYield ? ts.createToken(39 /* AsteriskToken */) : undefined, 
                 /*name*/ undefined, 
                 /*typeParameters*/ undefined, loopParameters, 
                 /*type*/ undefined, loopBody), loopBodyFlags))
-            ]));
+            ]), 2097152 /* NoHoisting */));
             var statements = [convertedLoopVariable];
             var extraVariableDeclarations;
             // propagate state from the inner loop to the outer loop if necessary
@@ -50296,8 +60667,8 @@ var ts;
                         extraVariableDeclarations = [];
                     }
                     // hoist collected variable declarations
-                    for (var name_36 in currentState.hoistedLocalVariables) {
-                        var identifier = currentState.hoistedLocalVariables[name_36];
+                    for (var _b = 0, _c = currentState.hoistedLocalVariables; _b < _c.length; _b++) {
+                        var identifier = _c[_b];
                         extraVariableDeclarations.push(ts.createVariableDeclaration(identifier));
                     }
                 }
@@ -50307,8 +60678,8 @@ var ts;
                 if (!extraVariableDeclarations) {
                     extraVariableDeclarations = [];
                 }
-                for (var _b = 0, loopOutParameters_1 = loopOutParameters; _b < loopOutParameters_1.length; _b++) {
-                    var outParam = loopOutParameters_1[_b];
+                for (var _d = 0, loopOutParameters_1 = loopOutParameters; _d < loopOutParameters_1.length; _d++) {
+                    var outParam = loopOutParameters_1[_d];
                     extraVariableDeclarations.push(ts.createVariableDeclaration(outParam.outParamName));
                 }
             }
@@ -50317,34 +60688,31 @@ var ts;
                 statements.push(ts.createVariableStatement(
                 /*modifiers*/ undefined, ts.createVariableDeclarationList(extraVariableDeclarations)));
             }
-            var convertedLoopBodyStatements = generateCallToConvertedLoop(functionName, loopParameters, currentState, isAsyncBlockContainingAwait);
+            var convertedLoopBodyStatements = generateCallToConvertedLoop(functionName, loopParameters, currentState, containsYield);
             var loop;
             if (convert) {
-                loop = convert(node, convertedLoopBodyStatements);
+                loop = convert(node, outermostLabeledStatement, convertedLoopBodyStatements);
             }
             else {
-                loop = ts.getMutableClone(node);
+                var clone_3 = ts.getMutableClone(node);
                 // clean statement part
-                loop.statement = undefined;
+                clone_3.statement = undefined;
                 // visit childnodes to transform initializer/condition/incrementor parts
-                loop = ts.visitEachChild(loop, visitor, context);
+                clone_3 = ts.visitEachChild(clone_3, visitor, context);
                 // set loop statement
-                loop.statement = ts.createBlock(convertedLoopBodyStatements, 
-                /*location*/ undefined, 
-                /*multiline*/ true);
+                clone_3.statement = ts.createBlock(convertedLoopBodyStatements, /*multiline*/ true);
                 // reset and re-aggregate the transform flags
-                loop.transformFlags = 0;
-                ts.aggregateTransformFlags(loop);
+                clone_3.transformFlags = 0;
+                ts.aggregateTransformFlags(clone_3);
+                loop = ts.restoreEnclosingLabel(clone_3, outermostLabeledStatement, convertedLoopState && resetLabel);
             }
-            statements.push(currentParent.kind === 214 /* LabeledStatement */
-                ? ts.createLabel(currentParent.label, loop)
-                : loop);
+            statements.push(loop);
             return statements;
         }
         function copyOutParameter(outParam, copyDirection) {
             var source = copyDirection === 0 /* ToOriginal */ ? outParam.outParamName : outParam.originalName;
             var target = copyDirection === 0 /* ToOriginal */ ? outParam.originalName : outParam.outParamName;
-            return ts.createBinary(target, 56 /* EqualsToken */, source);
+            return ts.createBinary(target, 58 /* EqualsToken */, source);
         }
         function copyOutParameters(outParams, copyDirection, statements) {
             for (var _i = 0, outParams_1 = outParams; _i < outParams_1.length; _i++) {
@@ -50362,7 +60730,9 @@ var ts;
                 !state.labeledNonLocalBreaks &&
                 !state.labeledNonLocalContinues;
             var call = ts.createCall(loopFunctionExpressionName, /*typeArguments*/ undefined, ts.map(parameters, function (p) { return p.name; }));
-            var callResult = isAsyncBlockContainingAwait ? ts.createYield(ts.createToken(37 /* AsteriskToken */), call) : call;
+            var callResult = isAsyncBlockContainingAwait
+                ? ts.createYield(ts.createToken(39 /* AsteriskToken */), ts.setEmitFlags(call, 8388608 /* Iterator */))
+                : call;
             if (isSimpleLoop) {
                 statements.push(ts.createStatement(callResult));
                 copyOutParameters(state.loopOutParameters, 0 /* ToOriginal */, statements);
@@ -50382,10 +60752,10 @@ var ts;
                     else {
                         returnStatement = ts.createReturn(ts.createPropertyAccess(loopResultName, "value"));
                     }
-                    statements.push(ts.createIf(ts.createBinary(ts.createTypeOf(loopResultName), 32 /* EqualsEqualsEqualsToken */, ts.createLiteral("object")), returnStatement));
+                    statements.push(ts.createIf(ts.createBinary(ts.createTypeOf(loopResultName), 34 /* EqualsEqualsEqualsToken */, ts.createLiteral("object")), returnStatement));
                 }
                 if (state.nonLocalJumps & 2 /* Break */) {
-                    statements.push(ts.createIf(ts.createBinary(loopResultName, 32 /* EqualsEqualsEqualsToken */, ts.createLiteral("break")), ts.createBreak()));
+                    statements.push(ts.createIf(ts.createBinary(loopResultName, 34 /* EqualsEqualsEqualsToken */, ts.createLiteral("break")), ts.createBreak()));
                 }
                 if (state.labeledNonLocalBreaks || state.labeledNonLocalContinues) {
                     var caseClauses = [];
@@ -50401,26 +60771,25 @@ var ts;
                 if (!state.labeledNonLocalBreaks) {
                     state.labeledNonLocalBreaks = ts.createMap();
                 }
-                state.labeledNonLocalBreaks[labelText] = labelMarker;
+                state.labeledNonLocalBreaks.set(labelText, labelMarker);
             }
             else {
                 if (!state.labeledNonLocalContinues) {
                     state.labeledNonLocalContinues = ts.createMap();
                 }
-                state.labeledNonLocalContinues[labelText] = labelMarker;
+                state.labeledNonLocalContinues.set(labelText, labelMarker);
             }
         }
         function processLabeledJumps(table, isBreak, loopResultName, outerLoop, caseClauses) {
             if (!table) {
                 return;
             }
-            for (var labelText in table) {
-                var labelMarker = table[labelText];
+            table.forEach(function (labelMarker, labelText) {
                 var statements = [];
                 // if there are no outer converted loop or outer label in question is located inside outer converted loop
                 // then emit labeled break\continue
                 // otherwise propagate pair 'label -> marker' to outer converted loop and emit 'return labelMarker' so outer loop can later decide what to do
-                if (!outerLoop || (outerLoop.labels && outerLoop.labels[labelText])) {
+                if (!outerLoop || (outerLoop.labels && outerLoop.labels.get(labelText))) {
                     var label = ts.createIdentifier(labelText);
                     statements.push(isBreak ? ts.createBreak(label) : ts.createContinue(label));
                 }
@@ -50429,7 +60798,7 @@ var ts;
                     statements.push(ts.createReturn(loopResultName));
                 }
                 caseClauses.push(ts.createCaseClause(ts.createLiteral(labelMarker), statements));
-            }
+            });
         }
         function processLoopVariableDeclaration(decl, loopParameters, loopOutParameters) {
             var name = decl.name;
@@ -50442,9 +60811,9 @@ var ts;
                 }
             }
             else {
-                loopParameters.push(ts.createParameter(name));
+                loopParameters.push(ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, name));
                 if (resolver.getNodeCheckFlags(decl) & 2097152 /* NeedsLoopOutParameter */) {
-                    var outParamName = ts.createUniqueName("out_" + name.text);
+                    var outParamName = ts.createUniqueName("out_" + ts.unescapeIdentifier(name.text));
                     loopOutParameters.push({ originalName: name, outParamName: outParamName });
                 }
             }
@@ -50464,21 +60833,21 @@ var ts;
             for (var i = start; i < numProperties; i++) {
                 var property = properties[i];
                 switch (property.kind) {
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
+                    case 153 /* GetAccessor */:
+                    case 154 /* SetAccessor */:
                         var accessors = ts.getAllAccessorDeclarations(node.properties, property);
                         if (property === accessors.firstAccessor) {
-                            expressions.push(transformAccessorsToExpression(receiver, accessors, node.multiLine));
+                            expressions.push(transformAccessorsToExpression(receiver, accessors, node, node.multiLine));
                         }
                         break;
-                    case 253 /* PropertyAssignment */:
-                        expressions.push(transformPropertyAssignmentToExpression(node, property, receiver, node.multiLine));
+                    case 151 /* MethodDeclaration */:
+                        expressions.push(transformObjectLiteralMethodDeclarationToExpression(property, receiver, node, node.multiLine));
                         break;
-                    case 254 /* ShorthandPropertyAssignment */:
-                        expressions.push(transformShorthandPropertyAssignmentToExpression(node, property, receiver, node.multiLine));
+                    case 261 /* PropertyAssignment */:
+                        expressions.push(transformPropertyAssignmentToExpression(property, receiver, node.multiLine));
                         break;
-                    case 147 /* MethodDeclaration */:
-                        expressions.push(transformObjectLiteralMethodDeclarationToExpression(node, property, receiver, node.multiLine));
+                    case 262 /* ShorthandPropertyAssignment */:
+                        expressions.push(transformShorthandPropertyAssignmentToExpression(property, receiver, node.multiLine));
                         break;
                     default:
                         ts.Debug.failBadSyntaxKind(node);
@@ -50493,9 +60862,9 @@ var ts;
          * @param property The PropertyAssignment node.
          * @param receiver The receiver for the assignment.
          */
-        function transformPropertyAssignmentToExpression(node, property, receiver, startsOnNewLine) {
-            var expression = ts.createAssignment(ts.createMemberAccessForPropertyName(receiver, ts.visitNode(property.name, visitor, ts.isPropertyName)), ts.visitNode(property.initializer, visitor, ts.isExpression), 
-            /*location*/ property);
+        function transformPropertyAssignmentToExpression(property, receiver, startsOnNewLine) {
+            var expression = ts.createAssignment(ts.createMemberAccessForPropertyName(receiver, ts.visitNode(property.name, visitor, ts.isPropertyName)), ts.visitNode(property.initializer, visitor, ts.isExpression));
+            ts.setTextRange(expression, property);
             if (startsOnNewLine) {
                 expression.startsOnNewLine = true;
             }
@@ -50508,9 +60877,9 @@ var ts;
          * @param property The ShorthandPropertyAssignment node.
          * @param receiver The receiver for the assignment.
          */
-        function transformShorthandPropertyAssignmentToExpression(node, property, receiver, startsOnNewLine) {
-            var expression = ts.createAssignment(ts.createMemberAccessForPropertyName(receiver, ts.visitNode(property.name, visitor, ts.isPropertyName)), ts.getSynthesizedClone(property.name), 
-            /*location*/ property);
+        function transformShorthandPropertyAssignmentToExpression(property, receiver, startsOnNewLine) {
+            var expression = ts.createAssignment(ts.createMemberAccessForPropertyName(receiver, ts.visitNode(property.name, visitor, ts.isPropertyName)), ts.getSynthesizedClone(property.name));
+            ts.setTextRange(expression, property);
             if (startsOnNewLine) {
                 expression.startsOnNewLine = true;
             }
@@ -50523,14 +60892,39 @@ var ts;
          * @param method The MethodDeclaration node.
          * @param receiver The receiver for the assignment.
          */
-        function transformObjectLiteralMethodDeclarationToExpression(node, method, receiver, startsOnNewLine) {
-            var expression = ts.createAssignment(ts.createMemberAccessForPropertyName(receiver, ts.visitNode(method.name, visitor, ts.isPropertyName)), transformFunctionLikeToExpression(method, /*location*/ method, /*name*/ undefined), 
-            /*location*/ method);
+        function transformObjectLiteralMethodDeclarationToExpression(method, receiver, container, startsOnNewLine) {
+            var ancestorFacts = enterSubtree(0 /* None */, 0 /* None */);
+            var expression = ts.createAssignment(ts.createMemberAccessForPropertyName(receiver, ts.visitNode(method.name, visitor, ts.isPropertyName)), transformFunctionLikeToExpression(method, /*location*/ method, /*name*/ undefined, container));
+            ts.setTextRange(expression, method);
             if (startsOnNewLine) {
                 expression.startsOnNewLine = true;
             }
+            exitSubtree(ancestorFacts, 49152 /* PropagateNewTargetMask */, hierarchyFacts & 49152 /* PropagateNewTargetMask */ ? 16384 /* NewTarget */ : 0 /* None */);
             return expression;
         }
+        function visitCatchClause(node) {
+            var ancestorFacts = enterSubtree(4032 /* BlockScopeExcludes */, 0 /* BlockScopeIncludes */);
+            var updated;
+            if (ts.isBindingPattern(node.variableDeclaration.name)) {
+                var temp = ts.createTempVariable(/*recordTempVariable*/ undefined);
+                var newVariableDeclaration = ts.createVariableDeclaration(temp);
+                ts.setTextRange(newVariableDeclaration, node.variableDeclaration);
+                var vars = ts.flattenDestructuringBinding(node.variableDeclaration, visitor, context, 0 /* All */, temp);
+                var list = ts.createVariableDeclarationList(vars);
+                ts.setTextRange(list, node.variableDeclaration);
+                var destructure = ts.createVariableStatement(/*modifiers*/ undefined, list);
+                updated = ts.updateCatchClause(node, newVariableDeclaration, addStatementToStartOfBlock(node.block, destructure));
+            }
+            else {
+                updated = ts.visitEachChild(node, visitor, context);
+            }
+            exitSubtree(ancestorFacts, 0 /* None */, 0 /* None */);
+            return updated;
+        }
+        function addStatementToStartOfBlock(block, statement) {
+            var transformedStatements = ts.visitNodes(block.statements, visitor, ts.isStatement);
+            return ts.updateBlock(block, [statement].concat(transformedStatements));
+        }
         /**
          * Visits a MethodDeclaration of an ObjectLiteralExpression and transforms it into a
          * PropertyAssignment.
@@ -50542,20 +60936,54 @@ var ts;
             // Methods on classes are handled in visitClassDeclaration/visitClassExpression.
             // Methods with computed property names are handled in visitObjectLiteralExpression.
             ts.Debug.assert(!ts.isComputedPropertyName(node.name));
-            var functionExpression = transformFunctionLikeToExpression(node, /*location*/ ts.moveRangePos(node, -1), /*name*/ undefined);
-            ts.setEmitFlags(functionExpression, 16384 /* NoLeadingComments */ | ts.getEmitFlags(functionExpression));
-            return ts.createPropertyAssignment(node.name, functionExpression, 
+            var functionExpression = transformFunctionLikeToExpression(node, /*location*/ ts.moveRangePos(node, -1), /*name*/ undefined, /*container*/ undefined);
+            ts.setEmitFlags(functionExpression, 512 /* NoLeadingComments */ | ts.getEmitFlags(functionExpression));
+            return ts.setTextRange(ts.createPropertyAssignment(node.name, functionExpression), 
             /*location*/ node);
         }
+        /**
+         * Visits an AccessorDeclaration of an ObjectLiteralExpression.
+         *
+         * @param node An AccessorDeclaration node.
+         */
+        function visitAccessorDeclaration(node) {
+            ts.Debug.assert(!ts.isComputedPropertyName(node.name));
+            var savedConvertedLoopState = convertedLoopState;
+            convertedLoopState = undefined;
+            var ancestorFacts = enterSubtree(16286 /* FunctionExcludes */, 65 /* FunctionIncludes */);
+            var updated;
+            if (node.transformFlags & 32768 /* ContainsCapturedLexicalThis */) {
+                var parameters = ts.visitParameterList(node.parameters, visitor, context);
+                var body = transformFunctionBody(node);
+                if (node.kind === 153 /* GetAccessor */) {
+                    updated = ts.updateGetAccessor(node, node.decorators, node.modifiers, node.name, parameters, node.type, body);
+                }
+                else {
+                    updated = ts.updateSetAccessor(node, node.decorators, node.modifiers, node.name, parameters, body);
+                }
+            }
+            else {
+                updated = ts.visitEachChild(node, visitor, context);
+            }
+            exitSubtree(ancestorFacts, 49152 /* PropagateNewTargetMask */, 0 /* None */);
+            convertedLoopState = savedConvertedLoopState;
+            return updated;
+        }
         /**
          * Visits a ShorthandPropertyAssignment and transforms it into a PropertyAssignment.
          *
          * @param node A ShorthandPropertyAssignment node.
          */
         function visitShorthandPropertyAssignment(node) {
-            return ts.createPropertyAssignment(node.name, ts.getSynthesizedClone(node.name), 
+            return ts.setTextRange(ts.createPropertyAssignment(node.name, ts.getSynthesizedClone(node.name)), 
             /*location*/ node);
         }
+        function visitComputedPropertyName(node) {
+            var ancestorFacts = enterSubtree(0 /* ComputedPropertyNameExcludes */, 8192 /* ComputedPropertyNameIncludes */);
+            var updated = ts.visitEachChild(node, visitor, context);
+            exitSubtree(ancestorFacts, 49152 /* PropagateNewTargetMask */, hierarchyFacts & 49152 /* PropagateNewTargetMask */ ? 32768 /* NewTargetInComputedPropertyName */ : 0 /* None */);
+            return updated;
+        }
         /**
          * Visits a YieldExpression node.
          *
@@ -50571,8 +60999,11 @@ var ts;
          * @param node An ArrayLiteralExpression node.
          */
         function visitArrayLiteralExpression(node) {
-            // We are here because we contain a SpreadElementExpression.
-            return transformAndSpreadElements(node.elements, /*needsUniqueCopy*/ true, node.multiLine, /*hasTrailingComma*/ node.elements.hasTrailingComma);
+            if (node.transformFlags & 64 /* ES2015 */) {
+                // We are here because we contain a SpreadElementExpression.
+                return transformAndSpreadElements(node.elements, /*needsUniqueCopy*/ true, node.multiLine, /*hasTrailingComma*/ node.elements.hasTrailingComma);
+            }
+            return ts.visitEachChild(node, visitor, context);
         }
         /**
          * Visits a CallExpression that contains either a spread element or `super`.
@@ -50580,7 +61011,121 @@ var ts;
          * @param node a CallExpression.
          */
         function visitCallExpression(node) {
-            return visitCallExpressionWithPotentialCapturedThisAssignment(node, /*assignToCapturedThis*/ true);
+            if (isTypeScriptClassWrapper(node)) {
+                return visitTypeScriptClassWrapper(node);
+            }
+            if (node.transformFlags & 64 /* ES2015 */) {
+                return visitCallExpressionWithPotentialCapturedThisAssignment(node, /*assignToCapturedThis*/ true);
+            }
+            return ts.updateCall(node, ts.visitNode(node.expression, callExpressionVisitor, ts.isExpression), 
+            /*typeArguments*/ undefined, ts.visitNodes(node.arguments, visitor, ts.isExpression));
+        }
+        function visitTypeScriptClassWrapper(node) {
+            // This is a call to a class wrapper function (an IIFE) created by the 'ts' transformer.
+            // The wrapper has a form similar to:
+            //
+            //  (function() {
+            //      class C { // 1
+            //      }
+            //      C.x = 1; // 2
+            //      return C;
+            //  }())
+            //
+            // When we transform the class, we end up with something like this:
+            //
+            //  (function () {
+            //      var C = (function () { // 3
+            //          function C() {
+            //          }
+            //          return C; // 4
+            //      }());
+            //      C.x = 1;
+            //      return C;
+            //  }())
+            //
+            // We want to simplify the two nested IIFEs to end up with something like this:
+            //
+            //  (function () {
+            //      function C() {
+            //      }
+            //      C.x = 1;
+            //      return C;
+            //  }())
+            // We skip any outer expressions in a number of places to get to the innermost
+            // expression, but we will restore them later to preserve comments and source maps.
+            var body = ts.cast(ts.skipOuterExpressions(node.expression), ts.isFunctionExpression).body;
+            // The class statements are the statements generated by visiting the first statement of the
+            // body (1), while all other statements are added to remainingStatements (2)
+            var classStatements = ts.visitNodes(body.statements, visitor, ts.isStatement, 0, 1);
+            var remainingStatements = ts.visitNodes(body.statements, visitor, ts.isStatement, 1, body.statements.length - 1);
+            var varStatement = ts.cast(ts.firstOrUndefined(classStatements), ts.isVariableStatement);
+            // We know there is only one variable declaration here as we verified this in an
+            // earlier call to isTypeScriptClassWrapper
+            var variable = varStatement.declarationList.declarations[0];
+            var initializer = ts.skipOuterExpressions(variable.initializer);
+            // Under certain conditions, the 'ts' transformer may introduce a class alias, which
+            // we see as an assignment, for example:
+            //
+            //  (function () {
+            //      var C = C_1 = (function () {
+            //          function C() {
+            //          }
+            //          C.x = function () { return C_1; }
+            //          return C;
+            //      }());
+            //      C = C_1 = __decorate([dec], C);
+            //      return C;
+            //      var C_1;
+            //  }())
+            //
+            var aliasAssignment = ts.tryCast(initializer, ts.isAssignmentExpression);
+            // The underlying call (3) is another IIFE that may contain a '_super' argument.
+            var call = ts.cast(aliasAssignment ? ts.skipOuterExpressions(aliasAssignment.right) : initializer, ts.isCallExpression);
+            var func = ts.cast(ts.skipOuterExpressions(call.expression), ts.isFunctionExpression);
+            var funcStatements = func.body.statements;
+            var classBodyStart = 0;
+            var classBodyEnd = -1;
+            var statements = [];
+            if (aliasAssignment) {
+                // If we have a class alias assignment, we need to move it to the down-level constructor
+                // function we generated for the class.
+                var extendsCall = ts.tryCast(funcStatements[classBodyStart], ts.isExpressionStatement);
+                if (extendsCall) {
+                    statements.push(extendsCall);
+                    classBodyStart++;
+                }
+                // The next statement is the function declaration.
+                statements.push(funcStatements[classBodyStart]);
+                classBodyStart++;
+                // Add the class alias following the declaration.
+                statements.push(ts.createStatement(ts.createAssignment(aliasAssignment.left, ts.cast(variable.name, ts.isIdentifier))));
+            }
+            // Find the trailing 'return' statement (4)
+            while (!ts.isReturnStatement(ts.elementAt(funcStatements, classBodyEnd))) {
+                classBodyEnd--;
+            }
+            // When we extract the statements of the inner IIFE, we exclude the 'return' statement (4)
+            // as we already have one that has been introduced by the 'ts' transformer.
+            ts.addRange(statements, funcStatements, classBodyStart, classBodyEnd);
+            if (classBodyEnd < -1) {
+                // If there were any hoisted declarations following the return statement, we should
+                // append them.
+                ts.addRange(statements, funcStatements, classBodyEnd + 1);
+            }
+            // Add the remaining statements of the outer wrapper.
+            ts.addRange(statements, remainingStatements);
+            // The 'es2015' class transform may add an end-of-declaration marker. If so we will add it
+            // after the remaining statements from the 'ts' transformer.
+            ts.addRange(statements, classStatements, /*start*/ 1);
+            // Recreate any outer parentheses or partially-emitted expressions to preserve source map
+            // and comment locations.
+            return ts.recreateOuterExpressions(node.expression, ts.recreateOuterExpressions(variable.initializer, ts.recreateOuterExpressions(aliasAssignment && aliasAssignment.right, ts.updateCall(call, ts.recreateOuterExpressions(call.expression, ts.updateFunctionExpression(func, 
+            /*modifiers*/ undefined, 
+            /*asteriskToken*/ undefined, 
+            /*name*/ undefined, 
+            /*typeParameters*/ undefined, func.parameters, 
+            /*type*/ undefined, ts.updateBlock(func.body, statements))), 
+            /*typeArguments*/ undefined, call.arguments))));
         }
         function visitImmediateSuperCallInBody(node) {
             return visitCallExpressionWithPotentialCapturedThisAssignment(node, /*assignToCapturedThis*/ false);
@@ -50589,11 +61134,11 @@ var ts;
             // We are here either because SuperKeyword was used somewhere in the expression, or
             // because we contain a SpreadElementExpression.
             var _a = ts.createCallBinding(node.expression, hoistVariableDeclaration), target = _a.target, thisArg = _a.thisArg;
-            if (node.expression.kind === 95 /* SuperKeyword */) {
-                ts.setEmitFlags(thisArg, 128 /* NoSubstitution */);
+            if (node.expression.kind === 97 /* SuperKeyword */) {
+                ts.setEmitFlags(thisArg, 4 /* NoSubstitution */);
             }
             var resultingCall;
-            if (node.transformFlags & 262144 /* ContainsSpreadElementExpression */) {
+            if (node.transformFlags & 524288 /* ContainsSpread */) {
                 // [source]
                 //      f(...a, b)
                 //      x.m(...a, b)
@@ -50607,7 +61152,7 @@ var ts;
                 //      _super.apply(this, a.concat([b]))
                 //      _super.m.apply(this, a.concat([b]))
                 //      _super.prototype.m.apply(this, a.concat([b]))
-                resultingCall = ts.createFunctionApply(ts.visitNode(target, visitor, ts.isExpression), ts.visitNode(thisArg, visitor, ts.isExpression), transformAndSpreadElements(node.arguments, /*needsUniqueCopy*/ false, /*multiLine*/ false, /*hasTrailingComma*/ false));
+                resultingCall = ts.createFunctionApply(ts.visitNode(target, callExpressionVisitor, ts.isExpression), ts.visitNode(thisArg, visitor, ts.isExpression), transformAndSpreadElements(node.arguments, /*needsUniqueCopy*/ false, /*multiLine*/ false, /*hasTrailingComma*/ false));
             }
             else {
                 // [source]
@@ -50619,18 +61164,18 @@ var ts;
                 //      _super.call(this, a)
                 //      _super.m.call(this, a)
                 //      _super.prototype.m.call(this, a)
-                resultingCall = ts.createFunctionCall(ts.visitNode(target, visitor, ts.isExpression), ts.visitNode(thisArg, visitor, ts.isExpression), ts.visitNodes(node.arguments, visitor, ts.isExpression), 
+                resultingCall = ts.createFunctionCall(ts.visitNode(target, callExpressionVisitor, ts.isExpression), ts.visitNode(thisArg, visitor, ts.isExpression), ts.visitNodes(node.arguments, visitor, ts.isExpression), 
                 /*location*/ node);
             }
-            if (node.expression.kind === 95 /* SuperKeyword */) {
+            if (node.expression.kind === 97 /* SuperKeyword */) {
                 var actualThis = ts.createThis();
-                ts.setEmitFlags(actualThis, 128 /* NoSubstitution */);
+                ts.setEmitFlags(actualThis, 4 /* NoSubstitution */);
                 var initializer = ts.createLogicalOr(resultingCall, actualThis);
-                return assignToCapturedThis
+                resultingCall = assignToCapturedThis
                     ? ts.createAssignment(ts.createIdentifier("_this"), initializer)
                     : initializer;
             }
-            return resultingCall;
+            return ts.setOriginalNode(resultingCall, node);
         }
         /**
          * Visits a NewExpression that contains a spread element.
@@ -50638,19 +61183,21 @@ var ts;
          * @param node A NewExpression node.
          */
         function visitNewExpression(node) {
-            // We are here because we contain a SpreadElementExpression.
-            ts.Debug.assert((node.transformFlags & 262144 /* ContainsSpreadElementExpression */) !== 0);
-            // [source]
-            //      new C(...a)
-            //
-            // [output]
-            //      new ((_a = C).bind.apply(_a, [void 0].concat(a)))()
-            var _a = ts.createCallBinding(ts.createPropertyAccess(node.expression, "bind"), hoistVariableDeclaration), target = _a.target, thisArg = _a.thisArg;
-            return ts.createNew(ts.createFunctionApply(ts.visitNode(target, visitor, ts.isExpression), thisArg, transformAndSpreadElements(ts.createNodeArray([ts.createVoidZero()].concat(node.arguments)), /*needsUniqueCopy*/ false, /*multiLine*/ false, /*hasTrailingComma*/ false)), 
-            /*typeArguments*/ undefined, []);
+            if (node.transformFlags & 524288 /* ContainsSpread */) {
+                // We are here because we contain a SpreadElementExpression.
+                // [source]
+                //      new C(...a)
+                //
+                // [output]
+                //      new ((_a = C).bind.apply(_a, [void 0].concat(a)))()
+                var _a = ts.createCallBinding(ts.createPropertyAccess(node.expression, "bind"), hoistVariableDeclaration), target = _a.target, thisArg = _a.thisArg;
+                return ts.createNew(ts.createFunctionApply(ts.visitNode(target, visitor, ts.isExpression), thisArg, transformAndSpreadElements(ts.createNodeArray([ts.createVoidZero()].concat(node.arguments)), /*needsUniqueCopy*/ false, /*multiLine*/ false, /*hasTrailingComma*/ false)), 
+                /*typeArguments*/ undefined, []);
+            }
+            return ts.visitEachChild(node, visitor, context);
         }
         /**
-         * Transforms an array of Expression nodes that contains a SpreadElementExpression.
+         * Transforms an array of Expression nodes that contains a SpreadExpression.
          *
          * @param elements The array of Expression nodes.
          * @param needsUniqueCopy A value indicating whether to ensure that the result is a fresh array.
@@ -50665,36 +61212,52 @@ var ts;
             // Map spans of spread expressions into their expressions and spans of other
             // expressions into an array literal.
             var numElements = elements.length;
-            var segments = ts.flatten(ts.spanMap(elements, partitionSpreadElement, function (partition, visitPartition, start, end) {
+            var segments = ts.flatten(ts.spanMap(elements, partitionSpread, function (partition, visitPartition, _start, end) {
                 return visitPartition(partition, multiLine, hasTrailingComma && end === numElements);
             }));
-            if (segments.length === 1) {
-                var firstElement = elements[0];
-                return needsUniqueCopy && ts.isSpreadElementExpression(firstElement) && firstElement.expression.kind !== 170 /* ArrayLiteralExpression */
-                    ? ts.createArraySlice(segments[0])
-                    : segments[0];
+            if (compilerOptions.downlevelIteration) {
+                if (segments.length === 1) {
+                    var firstSegment = segments[0];
+                    if (ts.isCallExpression(firstSegment)
+                        && ts.isIdentifier(firstSegment.expression)
+                        && (ts.getEmitFlags(firstSegment.expression) & 4096 /* HelperName */)
+                        && firstSegment.expression.text === "___spread") {
+                        return segments[0];
+                    }
+                }
+                return ts.createSpreadHelper(context, segments);
+            }
+            else {
+                if (segments.length === 1) {
+                    var firstElement = elements[0];
+                    return needsUniqueCopy && ts.isSpreadElement(firstElement) && firstElement.expression.kind !== 177 /* ArrayLiteralExpression */
+                        ? ts.createArraySlice(segments[0])
+                        : segments[0];
+                }
+                // Rewrite using the pattern <segment0>.concat(<segment1>, <segment2>, ...)
+                return ts.createArrayConcat(segments.shift(), segments);
             }
-            // Rewrite using the pattern <segment0>.concat(<segment1>, <segment2>, ...)
-            return ts.createArrayConcat(segments.shift(), segments);
         }
-        function partitionSpreadElement(node) {
-            return ts.isSpreadElementExpression(node)
-                ? visitSpanOfSpreadElements
-                : visitSpanOfNonSpreadElements;
+        function partitionSpread(node) {
+            return ts.isSpreadElement(node)
+                ? visitSpanOfSpreads
+                : visitSpanOfNonSpreads;
         }
-        function visitSpanOfSpreadElements(chunk, multiLine, hasTrailingComma) {
-            return ts.map(chunk, visitExpressionOfSpreadElement);
+        function visitSpanOfSpreads(chunk) {
+            return ts.map(chunk, visitExpressionOfSpread);
         }
-        function visitSpanOfNonSpreadElements(chunk, multiLine, hasTrailingComma) {
-            return ts.createArrayLiteral(ts.visitNodes(ts.createNodeArray(chunk, /*location*/ undefined, hasTrailingComma), visitor, ts.isExpression), 
-            /*location*/ undefined, multiLine);
+        function visitSpanOfNonSpreads(chunk, multiLine, hasTrailingComma) {
+            return ts.createArrayLiteral(ts.visitNodes(ts.createNodeArray(chunk, hasTrailingComma), visitor, ts.isExpression), multiLine);
+        }
+        function visitSpreadElement(node) {
+            return ts.visitNode(node.expression, visitor, ts.isExpression);
         }
         /**
-         * Transforms the expression of a SpreadElementExpression node.
+         * Transforms the expression of a SpreadExpression node.
          *
-         * @param node A SpreadElementExpression node.
+         * @param node A SpreadExpression node.
          */
-        function visitExpressionOfSpreadElement(node) {
+        function visitExpressionOfSpread(node) {
             return ts.visitNode(node.expression, visitor, ts.isExpression);
         }
         /**
@@ -50703,7 +61266,29 @@ var ts;
          * @param node A template literal.
          */
         function visitTemplateLiteral(node) {
-            return ts.createLiteral(node.text, /*location*/ node);
+            return ts.setTextRange(ts.createLiteral(node.text), node);
+        }
+        /**
+         * Visits a string literal with an extended unicode escape.
+         *
+         * @param node A string literal.
+         */
+        function visitStringLiteral(node) {
+            if (node.hasExtendedUnicodeEscape) {
+                return ts.setTextRange(ts.createLiteral(node.text), node);
+            }
+            return node;
+        }
+        /**
+         * Visits a binary or octal (ES6) numeric literal.
+         *
+         * @param node A string literal.
+         */
+        function visitNumericLiteral(node) {
+            if (node.numericLiteralFlags & 48 /* BinaryOrOctalSpecifier */) {
+                return ts.setTextRange(ts.createNumericLiteral(node.text), node);
+            }
+            return node;
         }
         /**
          * Visits a TaggedTemplateExpression node.
@@ -50757,13 +61342,13 @@ var ts;
             // thus we need to remove those characters.
             // First template piece starts with "`", others with "}"
             // Last template piece ends with "`", others with "${"
-            var isLast = node.kind === 11 /* NoSubstitutionTemplateLiteral */ || node.kind === 14 /* TemplateTail */;
+            var isLast = node.kind === 13 /* NoSubstitutionTemplateLiteral */ || node.kind === 16 /* TemplateTail */;
             text = text.substring(1, text.length - (isLast ? 1 : 2));
             // Newline normalization:
             // ES6 Spec 11.8.6.1 - Static Semantics of TV's and TRV's
             // <CR><LF> and <CR> LineTerminatorSequences are normalized to <LF> for both TV and TRV.
             text = text.replace(/\r\n?/g, "\n");
-            return ts.createLiteral(text, /*location*/ node);
+            return ts.setTextRange(ts.createLiteral(text), node);
         }
         /**
          * Visits a TemplateExpression node.
@@ -50785,7 +61370,8 @@ var ts;
             //    "abc" + (1 << 2) + ""
             var expression = ts.reduceLeft(expressions, ts.createAdd);
             if (ts.nodeIsSynthesized(expression)) {
-                ts.setTextRange(expression, node);
+                expression.pos = node.pos;
+                expression.end = node.end;
             }
             return expression;
         }
@@ -50847,39 +61433,42 @@ var ts;
         /**
          * Visits the `super` keyword
          */
-        function visitSuperKeyword(node) {
-            return enclosingNonAsyncFunctionBody
-                && ts.isClassElement(enclosingNonAsyncFunctionBody)
-                && !ts.hasModifier(enclosingNonAsyncFunctionBody, 32 /* Static */)
-                && currentParent.kind !== 174 /* CallExpression */
+        function visitSuperKeyword(isExpressionOfCall) {
+            return hierarchyFacts & 8 /* NonStaticClassElement */
+                && !isExpressionOfCall
                 ? ts.createPropertyAccess(ts.createIdentifier("_super"), "prototype")
                 : ts.createIdentifier("_super");
         }
-        function visitSourceFileNode(node) {
-            var _a = ts.span(node.statements, ts.isPrologueDirective), prologue = _a[0], remaining = _a[1];
-            var statements = [];
-            startLexicalEnvironment();
-            ts.addRange(statements, prologue);
-            addCaptureThisForNodeIfNeeded(statements, node);
-            ts.addRange(statements, ts.visitNodes(ts.createNodeArray(remaining), visitor, ts.isStatement));
-            ts.addRange(statements, endLexicalEnvironment());
-            var clone = ts.getMutableClone(node);
-            clone.statements = ts.createNodeArray(statements, /*location*/ node.statements);
-            return clone;
+        function visitMetaProperty(node) {
+            if (node.keywordToken === 94 /* NewKeyword */ && node.name.text === "target") {
+                if (hierarchyFacts & 8192 /* ComputedPropertyName */) {
+                    hierarchyFacts |= 32768 /* NewTargetInComputedPropertyName */;
+                }
+                else {
+                    hierarchyFacts |= 16384 /* NewTarget */;
+                }
+                return ts.createIdentifier("_newTarget");
+            }
+            return node;
         }
         /**
          * Called by the printer just before a node is printed.
          *
+         * @param hint A hint as to the intended usage of the node.
          * @param node The node to be printed.
+         * @param emitCallback The callback used to emit the node.
          */
-        function onEmitNode(emitContext, node, emitCallback) {
-            var savedEnclosingFunction = enclosingFunction;
+        function onEmitNode(hint, node, emitCallback) {
             if (enabledSubstitutions & 1 /* CapturedThis */ && ts.isFunctionLike(node)) {
                 // If we are tracking a captured `this`, keep track of the enclosing function.
-                enclosingFunction = node;
+                var ancestorFacts = enterSubtree(16286 /* FunctionExcludes */, ts.getEmitFlags(node) & 8 /* CapturesThis */
+                    ? 65 /* FunctionIncludes */ | 16 /* CapturesThis */
+                    : 65 /* FunctionIncludes */);
+                previousOnEmitNode(hint, node, emitCallback);
+                exitSubtree(ancestorFacts, 0 /* None */, 0 /* None */);
+                return;
             }
-            previousOnEmitNode(emitContext, node, emitCallback);
-            enclosingFunction = savedEnclosingFunction;
+            previousOnEmitNode(hint, node, emitCallback);
         }
         /**
          * Enables a more costly code path for substitutions when we determine a source file
@@ -50888,7 +61477,7 @@ var ts;
         function enableSubstitutionsForBlockScopedBindings() {
             if ((enabledSubstitutions & 2 /* BlockScopedBindings */) === 0) {
                 enabledSubstitutions |= 2 /* BlockScopedBindings */;
-                context.enableSubstitution(69 /* Identifier */);
+                context.enableSubstitution(71 /* Identifier */);
             }
         }
         /**
@@ -50898,26 +61487,25 @@ var ts;
         function enableSubstitutionsForCapturedThis() {
             if ((enabledSubstitutions & 1 /* CapturedThis */) === 0) {
                 enabledSubstitutions |= 1 /* CapturedThis */;
-                context.enableSubstitution(97 /* ThisKeyword */);
-                context.enableEmitNotification(148 /* Constructor */);
-                context.enableEmitNotification(147 /* MethodDeclaration */);
-                context.enableEmitNotification(149 /* GetAccessor */);
-                context.enableEmitNotification(150 /* SetAccessor */);
-                context.enableEmitNotification(180 /* ArrowFunction */);
-                context.enableEmitNotification(179 /* FunctionExpression */);
-                context.enableEmitNotification(220 /* FunctionDeclaration */);
+                context.enableSubstitution(99 /* ThisKeyword */);
+                context.enableEmitNotification(152 /* Constructor */);
+                context.enableEmitNotification(151 /* MethodDeclaration */);
+                context.enableEmitNotification(153 /* GetAccessor */);
+                context.enableEmitNotification(154 /* SetAccessor */);
+                context.enableEmitNotification(187 /* ArrowFunction */);
+                context.enableEmitNotification(186 /* FunctionExpression */);
+                context.enableEmitNotification(228 /* FunctionDeclaration */);
             }
         }
         /**
          * Hooks node substitutions.
          *
+         * @param hint The context for the emitter.
          * @param node The node to substitute.
-         * @param isExpression A value indicating whether the node is to be used in an expression
-         *                     position.
          */
-        function onSubstituteNode(emitContext, node) {
-            node = previousOnSubstituteNode(emitContext, node);
-            if (emitContext === 1 /* Expression */) {
+        function onSubstituteNode(hint, node) {
+            node = previousOnSubstituteNode(hint, node);
+            if (hint === 1 /* Expression */) {
                 return substituteExpression(node);
             }
             if (ts.isIdentifier(node)) {
@@ -50931,10 +61519,10 @@ var ts;
         function substituteIdentifier(node) {
             // Only substitute the identifier if we have enabled substitutions for block-scoped
             // bindings.
-            if (enabledSubstitutions & 2 /* BlockScopedBindings */) {
+            if (enabledSubstitutions & 2 /* BlockScopedBindings */ && !ts.isInternalName(node)) {
                 var original = ts.getParseTreeNode(node, ts.isIdentifier);
                 if (original && isNameOfDeclarationWithCollidingName(original)) {
-                    return ts.getGeneratedNameForNode(original);
+                    return ts.setTextRange(ts.getGeneratedNameForNode(original), node);
                 }
             }
             return node;
@@ -50948,10 +61536,10 @@ var ts;
         function isNameOfDeclarationWithCollidingName(node) {
             var parent = node.parent;
             switch (parent.kind) {
-                case 169 /* BindingElement */:
-                case 221 /* ClassDeclaration */:
-                case 224 /* EnumDeclaration */:
-                case 218 /* VariableDeclaration */:
+                case 176 /* BindingElement */:
+                case 229 /* ClassDeclaration */:
+                case 232 /* EnumDeclaration */:
+                case 226 /* VariableDeclaration */:
                     return parent.name === node
                         && resolver.isDeclarationWithCollidingName(parent);
             }
@@ -50964,9 +61552,9 @@ var ts;
          */
         function substituteExpression(node) {
             switch (node.kind) {
-                case 69 /* Identifier */:
+                case 71 /* Identifier */:
                     return substituteExpressionIdentifier(node);
-                case 97 /* ThisKeyword */:
+                case 99 /* ThisKeyword */:
                     return substituteThisKeyword(node);
             }
             return node;
@@ -50977,14 +61565,37 @@ var ts;
          * @param node An Identifier node.
          */
         function substituteExpressionIdentifier(node) {
-            if (enabledSubstitutions & 2 /* BlockScopedBindings */) {
+            if (enabledSubstitutions & 2 /* BlockScopedBindings */ && !ts.isInternalName(node)) {
                 var declaration = resolver.getReferencedDeclarationWithCollidingName(node);
-                if (declaration) {
-                    return ts.getGeneratedNameForNode(declaration.name);
+                if (declaration && !(ts.isClassLike(declaration) && isPartOfClassBody(declaration, node))) {
+                    return ts.setTextRange(ts.getGeneratedNameForNode(ts.getNameOfDeclaration(declaration)), node);
                 }
             }
             return node;
         }
+        function isPartOfClassBody(declaration, node) {
+            var currentNode = ts.getParseTreeNode(node);
+            if (!currentNode || currentNode === declaration || currentNode.end <= declaration.pos || currentNode.pos >= declaration.end) {
+                // if the node has no correlation to a parse tree node, its definitely not
+                // part of the body.
+                // if the node is outside of the document range of the declaration, its
+                // definitely not part of the body.
+                return false;
+            }
+            var blockScope = ts.getEnclosingBlockScopeContainer(declaration);
+            while (currentNode) {
+                if (currentNode === blockScope || currentNode === declaration) {
+                    // if we are in the enclosing block scope of the declaration, we are definitely
+                    // not inside the class body.
+                    return false;
+                }
+                if (ts.isClassElement(currentNode) && currentNode.parent === declaration) {
+                    return true;
+                }
+                currentNode = currentNode.parent;
+            }
+            return false;
+        }
         /**
          * Substitutes `this` when contained within an arrow function.
          *
@@ -50992,81 +61603,58 @@ var ts;
          */
         function substituteThisKeyword(node) {
             if (enabledSubstitutions & 1 /* CapturedThis */
-                && enclosingFunction
-                && ts.getEmitFlags(enclosingFunction) & 256 /* CapturesThis */) {
-                return ts.createIdentifier("_this", /*location*/ node);
+                && hierarchyFacts & 16 /* CapturesThis */) {
+                return ts.setTextRange(ts.createIdentifier("_this"), node);
             }
             return node;
         }
-        /**
-         * Gets the local name for a declaration for use in expressions.
-         *
-         * A local name will *never* be prefixed with an module or namespace export modifier like
-         * "exports.".
-         *
-         * @param node The declaration.
-         * @param allowComments A value indicating whether comments may be emitted for the name.
-         * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
-         */
-        function getLocalName(node, allowComments, allowSourceMaps) {
-            return getDeclarationName(node, allowComments, allowSourceMaps, 262144 /* LocalName */);
-        }
-        /**
-         * Gets the name of a declaration, without source map or comments.
-         *
-         * @param node The declaration.
-         * @param allowComments Allow comments for the name.
-         */
-        function getDeclarationName(node, allowComments, allowSourceMaps, emitFlags) {
-            if (node.name && !ts.isGeneratedIdentifier(node.name)) {
-                var name_37 = ts.getMutableClone(node.name);
-                emitFlags |= ts.getEmitFlags(node.name);
-                if (!allowSourceMaps) {
-                    emitFlags |= 1536 /* NoSourceMap */;
-                }
-                if (!allowComments) {
-                    emitFlags |= 49152 /* NoComments */;
-                }
-                if (emitFlags) {
-                    ts.setEmitFlags(name_37, emitFlags);
-                }
-                return name_37;
-            }
-            return ts.getGeneratedNameForNode(node);
-        }
         function getClassMemberPrefix(node, member) {
-            var expression = getLocalName(node);
-            return ts.hasModifier(member, 32 /* Static */) ? expression : ts.createPropertyAccess(expression, "prototype");
+            return ts.hasModifier(member, 32 /* Static */)
+                ? ts.getInternalName(node)
+                : ts.createPropertyAccess(ts.getInternalName(node), "prototype");
         }
         function hasSynthesizedDefaultSuperCall(constructor, hasExtendsClause) {
             if (!constructor || !hasExtendsClause) {
                 return false;
             }
-            var parameter = ts.singleOrUndefined(constructor.parameters);
-            if (!parameter || !ts.nodeIsSynthesized(parameter) || !parameter.dotDotDotToken) {
+            if (ts.some(constructor.parameters)) {
                 return false;
             }
             var statement = ts.firstOrUndefined(constructor.body.statements);
-            if (!statement || !ts.nodeIsSynthesized(statement) || statement.kind !== 202 /* ExpressionStatement */) {
+            if (!statement || !ts.nodeIsSynthesized(statement) || statement.kind !== 210 /* ExpressionStatement */) {
                 return false;
             }
             var statementExpression = statement.expression;
-            if (!ts.nodeIsSynthesized(statementExpression) || statementExpression.kind !== 174 /* CallExpression */) {
+            if (!ts.nodeIsSynthesized(statementExpression) || statementExpression.kind !== 181 /* CallExpression */) {
                 return false;
             }
             var callTarget = statementExpression.expression;
-            if (!ts.nodeIsSynthesized(callTarget) || callTarget.kind !== 95 /* SuperKeyword */) {
+            if (!ts.nodeIsSynthesized(callTarget) || callTarget.kind !== 97 /* SuperKeyword */) {
                 return false;
             }
             var callArgument = ts.singleOrUndefined(statementExpression.arguments);
-            if (!callArgument || !ts.nodeIsSynthesized(callArgument) || callArgument.kind !== 191 /* SpreadElementExpression */) {
+            if (!callArgument || !ts.nodeIsSynthesized(callArgument) || callArgument.kind !== 198 /* SpreadElement */) {
                 return false;
             }
             var expression = callArgument.expression;
-            return ts.isIdentifier(expression) && expression === parameter.name;
+            return ts.isIdentifier(expression) && expression.text === "arguments";
         }
     }
-    ts.transformES6 = transformES6;
+    ts.transformES2015 = transformES2015;
+    function createExtendsHelper(context, name) {
+        context.requestEmitHelper(extendsHelper);
+        return ts.createCall(ts.getHelperName("__extends"), 
+        /*typeArguments*/ undefined, [
+            name,
+            ts.createIdentifier("_super")
+        ]);
+    }
+    var extendsHelper = {
+        name: "typescript:extends",
+        scoped: false,
+        priority: 0,
+        text: "\n            var __extends = (this && this.__extends) || (function () {\n                var extendStatics = Object.setPrototypeOf ||\n                    ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\n                    function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };\n                return function (d, b) {\n                    extendStatics(d, b);\n                    function __() { this.constructor = d; }\n                    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\n                };\n            })();"
+    };
 })(ts || (ts = {}));
 /// <reference path="../factory.ts" />
 /// <reference path="../visitor.ts" />
@@ -51240,15 +61828,17 @@ var ts;
         Instruction[Instruction["Catch"] = 6] = "Catch";
         Instruction[Instruction["Endfinally"] = 7] = "Endfinally";
     })(Instruction || (Instruction = {}));
-    var instructionNames = ts.createMap((_a = {},
-        _a[2 /* Return */] = "return",
-        _a[3 /* Break */] = "break",
-        _a[4 /* Yield */] = "yield",
-        _a[5 /* YieldStar */] = "yield*",
-        _a[7 /* Endfinally */] = "endfinally",
-        _a));
+    function getInstructionName(instruction) {
+        switch (instruction) {
+            case 2 /* Return */: return "return";
+            case 3 /* Break */: return "break";
+            case 4 /* Yield */: return "yield";
+            case 5 /* YieldStar */: return "yield*";
+            case 7 /* Endfinally */: return "endfinally";
+        }
+    }
     function transformGenerators(context) {
-        var startLexicalEnvironment = context.startLexicalEnvironment, endLexicalEnvironment = context.endLexicalEnvironment, hoistFunctionDeclaration = context.hoistFunctionDeclaration, hoistVariableDeclaration = context.hoistVariableDeclaration;
+        var resumeLexicalEnvironment = context.resumeLexicalEnvironment, endLexicalEnvironment = context.endLexicalEnvironment, hoistFunctionDeclaration = context.hoistFunctionDeclaration, hoistVariableDeclaration = context.hoistVariableDeclaration;
         var compilerOptions = context.getCompilerOptions();
         var languageVersion = ts.getEmitScriptTarget(compilerOptions);
         var resolver = context.getEmitResolver();
@@ -51298,15 +61888,14 @@ var ts;
         var withBlockStack; // A stack containing `with` blocks.
         return transformSourceFile;
         function transformSourceFile(node) {
-            if (ts.isDeclarationFile(node)) {
+            if (node.isDeclarationFile || (node.transformFlags & 512 /* ContainsGenerator */) === 0) {
                 return node;
             }
-            if (node.transformFlags & 1024 /* ContainsGenerator */) {
-                currentSourceFile = node;
-                node = ts.visitEachChild(node, visitor, context);
-                currentSourceFile = undefined;
-            }
-            return node;
+            currentSourceFile = node;
+            var visited = ts.visitEachChild(node, visitor, context);
+            ts.addEmitHelpers(visited, context.readEmitHelpers());
+            currentSourceFile = undefined;
+            return visited;
         }
         /**
          * Visits a node.
@@ -51321,10 +61910,10 @@ var ts;
             else if (inGeneratorFunctionBody) {
                 return visitJavaScriptInGeneratorFunctionBody(node);
             }
-            else if (transformFlags & 512 /* Generator */) {
+            else if (transformFlags & 256 /* Generator */) {
                 return visitGenerator(node);
             }
-            else if (transformFlags & 1024 /* ContainsGenerator */) {
+            else if (transformFlags & 512 /* ContainsGenerator */) {
                 return ts.visitEachChild(node, visitor, context);
             }
             else {
@@ -51338,13 +61927,13 @@ var ts;
          */
         function visitJavaScriptInStatementContainingYield(node) {
             switch (node.kind) {
-                case 204 /* DoStatement */:
+                case 212 /* DoStatement */:
                     return visitDoStatement(node);
-                case 205 /* WhileStatement */:
+                case 213 /* WhileStatement */:
                     return visitWhileStatement(node);
-                case 213 /* SwitchStatement */:
+                case 221 /* SwitchStatement */:
                     return visitSwitchStatement(node);
-                case 214 /* LabeledStatement */:
+                case 222 /* LabeledStatement */:
                     return visitLabeledStatement(node);
                 default:
                     return visitJavaScriptInGeneratorFunctionBody(node);
@@ -51357,30 +61946,30 @@ var ts;
          */
         function visitJavaScriptInGeneratorFunctionBody(node) {
             switch (node.kind) {
-                case 220 /* FunctionDeclaration */:
+                case 228 /* FunctionDeclaration */:
                     return visitFunctionDeclaration(node);
-                case 179 /* FunctionExpression */:
+                case 186 /* FunctionExpression */:
                     return visitFunctionExpression(node);
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
+                case 153 /* GetAccessor */:
+                case 154 /* SetAccessor */:
                     return visitAccessorDeclaration(node);
-                case 200 /* VariableStatement */:
+                case 208 /* VariableStatement */:
                     return visitVariableStatement(node);
-                case 206 /* ForStatement */:
+                case 214 /* ForStatement */:
                     return visitForStatement(node);
-                case 207 /* ForInStatement */:
+                case 215 /* ForInStatement */:
                     return visitForInStatement(node);
-                case 210 /* BreakStatement */:
+                case 218 /* BreakStatement */:
                     return visitBreakStatement(node);
-                case 209 /* ContinueStatement */:
+                case 217 /* ContinueStatement */:
                     return visitContinueStatement(node);
-                case 211 /* ReturnStatement */:
+                case 219 /* ReturnStatement */:
                     return visitReturnStatement(node);
                 default:
-                    if (node.transformFlags & 4194304 /* ContainsYield */) {
+                    if (node.transformFlags & 16777216 /* ContainsYield */) {
                         return visitJavaScriptContainingYield(node);
                     }
-                    else if (node.transformFlags & (1024 /* ContainsGenerator */ | 8388608 /* ContainsHoistedDeclarationOrCompletion */)) {
+                    else if (node.transformFlags & (512 /* ContainsGenerator */ | 33554432 /* ContainsHoistedDeclarationOrCompletion */)) {
                         return ts.visitEachChild(node, visitor, context);
                     }
                     else {
@@ -51395,21 +61984,21 @@ var ts;
          */
         function visitJavaScriptContainingYield(node) {
             switch (node.kind) {
-                case 187 /* BinaryExpression */:
+                case 194 /* BinaryExpression */:
                     return visitBinaryExpression(node);
-                case 188 /* ConditionalExpression */:
+                case 195 /* ConditionalExpression */:
                     return visitConditionalExpression(node);
-                case 190 /* YieldExpression */:
+                case 197 /* YieldExpression */:
                     return visitYieldExpression(node);
-                case 170 /* ArrayLiteralExpression */:
+                case 177 /* ArrayLiteralExpression */:
                     return visitArrayLiteralExpression(node);
-                case 171 /* ObjectLiteralExpression */:
+                case 178 /* ObjectLiteralExpression */:
                     return visitObjectLiteralExpression(node);
-                case 173 /* ElementAccessExpression */:
+                case 180 /* ElementAccessExpression */:
                     return visitElementAccessExpression(node);
-                case 174 /* CallExpression */:
+                case 181 /* CallExpression */:
                     return visitCallExpression(node);
-                case 175 /* NewExpression */:
+                case 182 /* NewExpression */:
                     return visitNewExpression(node);
                 default:
                     return ts.visitEachChild(node, visitor, context);
@@ -51422,9 +62011,9 @@ var ts;
          */
         function visitGenerator(node) {
             switch (node.kind) {
-                case 220 /* FunctionDeclaration */:
+                case 228 /* FunctionDeclaration */:
                     return visitFunctionDeclaration(node);
-                case 179 /* FunctionExpression */:
+                case 186 /* FunctionExpression */:
                     return visitFunctionExpression(node);
                 default:
                     ts.Debug.failBadSyntaxKind(node);
@@ -51442,13 +62031,12 @@ var ts;
          */
         function visitFunctionDeclaration(node) {
             // Currently, we only support generators that were originally async functions.
-            if (node.asteriskToken && ts.getEmitFlags(node) & 2097152 /* AsyncFunctionBody */) {
-                node = ts.setOriginalNode(ts.createFunctionDeclaration(
-                /*decorators*/ undefined, 
-                /*modifiers*/ undefined, 
+            if (node.asteriskToken) {
+                node = ts.setOriginalNode(ts.setTextRange(ts.createFunctionDeclaration(
+                /*decorators*/ undefined, node.modifiers, 
                 /*asteriskToken*/ undefined, node.name, 
-                /*typeParameters*/ undefined, node.parameters, 
-                /*type*/ undefined, transformGeneratorFunctionBody(node.body), 
+                /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
+                /*type*/ undefined, transformGeneratorFunctionBody(node.body)), 
                 /*location*/ node), node);
             }
             else {
@@ -51481,11 +62069,12 @@ var ts;
          */
         function visitFunctionExpression(node) {
             // Currently, we only support generators that were originally async functions.
-            if (node.asteriskToken && ts.getEmitFlags(node) & 2097152 /* AsyncFunctionBody */) {
-                node = ts.setOriginalNode(ts.createFunctionExpression(
+            if (node.asteriskToken) {
+                node = ts.setOriginalNode(ts.setTextRange(ts.createFunctionExpression(
+                /*modifiers*/ undefined, 
                 /*asteriskToken*/ undefined, node.name, 
-                /*typeParameters*/ undefined, node.parameters, 
-                /*type*/ undefined, transformGeneratorFunctionBody(node.body), 
+                /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
+                /*type*/ undefined, transformGeneratorFunctionBody(node.body)), 
                 /*location*/ node), node);
             }
             else {
@@ -51530,6 +62119,7 @@ var ts;
             var savedBlocks = blocks;
             var savedBlockOffsets = blockOffsets;
             var savedBlockActions = blockActions;
+            var savedBlockStack = blockStack;
             var savedLabelOffsets = labelOffsets;
             var savedLabelExpressions = labelExpressions;
             var savedNextLabelId = nextLabelId;
@@ -51543,6 +62133,7 @@ var ts;
             blocks = undefined;
             blockOffsets = undefined;
             blockActions = undefined;
+            blockStack = undefined;
             labelOffsets = undefined;
             labelExpressions = undefined;
             nextLabelId = 1;
@@ -51551,8 +62142,8 @@ var ts;
             operationLocations = undefined;
             state = ts.createTempVariable(/*recordTempVariable*/ undefined);
             // Build the generator
-            startLexicalEnvironment();
-            var statementOffset = ts.addPrologueDirectives(statements, body.statements, /*ensureUseStrict*/ false, visitor);
+            resumeLexicalEnvironment();
+            var statementOffset = ts.addPrologue(statements, body.statements, /*ensureUseStrict*/ false, visitor);
             transformAndEmitStatements(body.statements, statementOffset);
             var buildResult = build();
             ts.addRange(statements, endLexicalEnvironment());
@@ -51563,6 +62154,7 @@ var ts;
             blocks = savedBlocks;
             blockOffsets = savedBlockOffsets;
             blockActions = savedBlockActions;
+            blockStack = savedBlockStack;
             labelOffsets = savedLabelOffsets;
             labelExpressions = savedLabelExpressions;
             nextLabelId = savedNextLabelId;
@@ -51570,7 +62162,7 @@ var ts;
             operationArguments = savedOperationArguments;
             operationLocations = savedOperationLocations;
             state = savedState;
-            return ts.createBlock(statements, /*location*/ body, body.multiLine);
+            return ts.setTextRange(ts.createBlock(statements, body.multiLine), body);
         }
         /**
          * Visits a variable statement.
@@ -51581,13 +62173,13 @@ var ts;
          * @param node The node to visit.
          */
         function visitVariableStatement(node) {
-            if (node.transformFlags & 4194304 /* ContainsYield */) {
+            if (node.transformFlags & 16777216 /* ContainsYield */) {
                 transformAndEmitVariableDeclarationList(node.declarationList);
                 return undefined;
             }
             else {
                 // Do not hoist custom prologues.
-                if (ts.getEmitFlags(node) & 8388608 /* CustomPrologue */) {
+                if (ts.getEmitFlags(node) & 1048576 /* CustomPrologue */) {
                     return node;
                 }
                 for (var _i = 0, _a = node.declarationList.declarations; _i < _a.length; _i++) {
@@ -51598,7 +62190,7 @@ var ts;
                 if (variables.length === 0) {
                     return undefined;
                 }
-                return ts.createStatement(ts.inlineExpressions(ts.map(variables, transformInitializedVariable)));
+                return ts.setSourceMapRange(ts.createStatement(ts.inlineExpressions(ts.map(variables, transformInitializedVariable))), node);
             }
         }
         /**
@@ -51620,23 +62212,23 @@ var ts;
             }
         }
         function isCompoundAssignment(kind) {
-            return kind >= 57 /* FirstCompoundAssignment */
-                && kind <= 68 /* LastCompoundAssignment */;
+            return kind >= 59 /* FirstCompoundAssignment */
+                && kind <= 70 /* LastCompoundAssignment */;
         }
         function getOperatorForCompoundAssignment(kind) {
             switch (kind) {
-                case 57 /* PlusEqualsToken */: return 35 /* PlusToken */;
-                case 58 /* MinusEqualsToken */: return 36 /* MinusToken */;
-                case 59 /* AsteriskEqualsToken */: return 37 /* AsteriskToken */;
-                case 60 /* AsteriskAsteriskEqualsToken */: return 38 /* AsteriskAsteriskToken */;
-                case 61 /* SlashEqualsToken */: return 39 /* SlashToken */;
-                case 62 /* PercentEqualsToken */: return 40 /* PercentToken */;
-                case 63 /* LessThanLessThanEqualsToken */: return 43 /* LessThanLessThanToken */;
-                case 64 /* GreaterThanGreaterThanEqualsToken */: return 44 /* GreaterThanGreaterThanToken */;
-                case 65 /* GreaterThanGreaterThanGreaterThanEqualsToken */: return 45 /* GreaterThanGreaterThanGreaterThanToken */;
-                case 66 /* AmpersandEqualsToken */: return 46 /* AmpersandToken */;
-                case 67 /* BarEqualsToken */: return 47 /* BarToken */;
-                case 68 /* CaretEqualsToken */: return 48 /* CaretToken */;
+                case 59 /* PlusEqualsToken */: return 37 /* PlusToken */;
+                case 60 /* MinusEqualsToken */: return 38 /* MinusToken */;
+                case 61 /* AsteriskEqualsToken */: return 39 /* AsteriskToken */;
+                case 62 /* AsteriskAsteriskEqualsToken */: return 40 /* AsteriskAsteriskToken */;
+                case 63 /* SlashEqualsToken */: return 41 /* SlashToken */;
+                case 64 /* PercentEqualsToken */: return 42 /* PercentToken */;
+                case 65 /* LessThanLessThanEqualsToken */: return 45 /* LessThanLessThanToken */;
+                case 66 /* GreaterThanGreaterThanEqualsToken */: return 46 /* GreaterThanGreaterThanToken */;
+                case 67 /* GreaterThanGreaterThanGreaterThanEqualsToken */: return 47 /* GreaterThanGreaterThanGreaterThanToken */;
+                case 68 /* AmpersandEqualsToken */: return 48 /* AmpersandToken */;
+                case 69 /* BarEqualsToken */: return 49 /* BarToken */;
+                case 70 /* CaretEqualsToken */: return 50 /* CaretToken */;
             }
         }
         /**
@@ -51649,7 +62241,7 @@ var ts;
             if (containsYield(right)) {
                 var target = void 0;
                 switch (left.kind) {
-                    case 172 /* PropertyAccessExpression */:
+                    case 179 /* PropertyAccessExpression */:
                         // [source]
                         //      a.b = yield;
                         //
@@ -51661,7 +62253,7 @@ var ts;
                         //      _a.b = %sent%;
                         target = ts.updatePropertyAccess(left, cacheExpression(ts.visitNode(left.expression, visitor, ts.isLeftHandSideExpression)), left.name);
                         break;
-                    case 173 /* ElementAccessExpression */:
+                    case 180 /* ElementAccessExpression */:
                         // [source]
                         //      a[b] = yield;
                         //
@@ -51680,7 +62272,7 @@ var ts;
                 }
                 var operator = node.operatorToken.kind;
                 if (isCompoundAssignment(operator)) {
-                    return ts.createBinary(target, 56 /* EqualsToken */, ts.createBinary(cacheExpression(target), getOperatorForCompoundAssignment(operator), ts.visitNode(right, visitor, ts.isExpression), node), node);
+                    return ts.setTextRange(ts.createAssignment(target, ts.setTextRange(ts.createBinary(cacheExpression(target), getOperatorForCompoundAssignment(operator), ts.visitNode(right, visitor, ts.isExpression)), node)), node);
                 }
                 else {
                     return ts.updateBinary(node, target, ts.visitNode(right, visitor, ts.isExpression));
@@ -51693,7 +62285,7 @@ var ts;
                 if (ts.isLogicalOperator(node.operatorToken.kind)) {
                     return visitLogicalBinaryExpression(node);
                 }
-                else if (node.operatorToken.kind === 24 /* CommaToken */) {
+                else if (node.operatorToken.kind === 26 /* CommaToken */) {
                     return visitCommaExpression(node);
                 }
                 // [source]
@@ -51704,10 +62296,10 @@ var ts;
                 //      _a = a();
                 //  .yield resumeLabel
                 //      _a + %sent% + c()
-                var clone_6 = ts.getMutableClone(node);
-                clone_6.left = cacheExpression(ts.visitNode(node.left, visitor, ts.isExpression));
-                clone_6.right = ts.visitNode(node.right, visitor, ts.isExpression);
-                return clone_6;
+                var clone_4 = ts.getMutableClone(node);
+                clone_4.left = cacheExpression(ts.visitNode(node.left, visitor, ts.isExpression));
+                clone_4.right = ts.visitNode(node.right, visitor, ts.isExpression);
+                return clone_4;
             }
             return ts.visitEachChild(node, visitor, context);
         }
@@ -51748,7 +62340,7 @@ var ts;
             var resultLabel = defineLabel();
             var resultLocal = declareLocal();
             emitAssignment(resultLocal, ts.visitNode(node.left, visitor, ts.isExpression), /*location*/ node.left);
-            if (node.operatorToken.kind === 51 /* AmpersandAmpersandToken */) {
+            if (node.operatorToken.kind === 53 /* AmpersandAmpersandToken */) {
                 // Logical `&&` shortcuts when the left-hand operand is falsey.
                 emitBreakWhenFalse(resultLabel, resultLocal, /*location*/ node.left);
             }
@@ -51779,7 +62371,7 @@ var ts;
             visit(node.right);
             return ts.inlineExpressions(pendingExpressions);
             function visit(node) {
-                if (ts.isBinaryExpression(node) && node.operatorToken.kind === 24 /* CommaToken */) {
+                if (ts.isBinaryExpression(node) && node.operatorToken.kind === 26 /* CommaToken */) {
                     visit(node.left);
                     visit(node.right);
                 }
@@ -51842,17 +62434,19 @@ var ts;
             //  .yield resumeLabel, (a())
             //  .mark resumeLabel
             //      x = %sent%;
-            // NOTE: we are explicitly not handling YieldStar at this time.
             var resumeLabel = defineLabel();
             var expression = ts.visitNode(node.expression, visitor, ts.isExpression);
             if (node.asteriskToken) {
-                emitYieldStar(expression, /*location*/ node);
+                var iterator = (ts.getEmitFlags(node.expression) & 8388608 /* Iterator */) === 0
+                    ? ts.createValuesHelper(context, expression, /*location*/ node)
+                    : expression;
+                emitYieldStar(iterator, /*location*/ node);
             }
             else {
                 emitYield(expression, /*location*/ node);
             }
             markLabel(resumeLabel);
-            return createGeneratorResume();
+            return createGeneratorResume(/*location*/ node);
         }
         /**
          * Visits an ArrayLiteralExpression that contains a YieldExpression.
@@ -51860,7 +62454,7 @@ var ts;
          * @param node The node to visit.
          */
         function visitArrayLiteralExpression(node) {
-            return visitElements(node.elements, node.multiLine);
+            return visitElements(node.elements, /*leadingElement*/ undefined, /*location*/ undefined, node.multiLine);
         }
         /**
          * Visits an array of expressions containing one or more YieldExpression nodes
@@ -51869,7 +62463,7 @@ var ts;
          * @param elements The elements to visit.
          * @param multiLine Whether array literals created should be emitted on multiple lines.
          */
-        function visitElements(elements, multiLine) {
+        function visitElements(elements, leadingElement, location, multiLine) {
             // [source]
             //      ar = [1, yield, 2];
             //
@@ -51880,22 +62474,28 @@ var ts;
             //  .mark resumeLabel
             //      ar = _a.concat([%sent%, 2]);
             var numInitialElements = countInitialNodesWithoutYield(elements);
-            var temp = declareLocal();
-            var hasAssignedTemp = false;
+            var temp;
             if (numInitialElements > 0) {
-                emitAssignment(temp, ts.createArrayLiteral(ts.visitNodes(elements, visitor, ts.isExpression, 0, numInitialElements)));
-                hasAssignedTemp = true;
+                temp = declareLocal();
+                var initialElements = ts.visitNodes(elements, visitor, ts.isExpression, 0, numInitialElements);
+                emitAssignment(temp, ts.createArrayLiteral(leadingElement
+                    ? [leadingElement].concat(initialElements) : initialElements));
+                leadingElement = undefined;
             }
             var expressions = ts.reduceLeft(elements, reduceElement, [], numInitialElements);
-            return hasAssignedTemp
-                ? ts.createArrayConcat(temp, [ts.createArrayLiteral(expressions)])
-                : ts.createArrayLiteral(expressions);
+            return temp
+                ? ts.createArrayConcat(temp, [ts.createArrayLiteral(expressions, multiLine)])
+                : ts.setTextRange(ts.createArrayLiteral(leadingElement ? [leadingElement].concat(expressions) : expressions, multiLine), location);
             function reduceElement(expressions, element) {
                 if (containsYield(element) && expressions.length > 0) {
+                    var hasAssignedTemp = temp !== undefined;
+                    if (!temp) {
+                        temp = declareLocal();
+                    }
                     emitAssignment(temp, hasAssignedTemp
-                        ? ts.createArrayConcat(temp, [ts.createArrayLiteral(expressions)])
-                        : ts.createArrayLiteral(expressions));
-                    hasAssignedTemp = true;
+                        ? ts.createArrayConcat(temp, [ts.createArrayLiteral(expressions, multiLine)])
+                        : ts.createArrayLiteral(leadingElement ? [leadingElement].concat(expressions) : expressions, multiLine));
+                    leadingElement = undefined;
                     expressions = [];
                 }
                 expressions.push(ts.visitNode(element, visitor, ts.isExpression));
@@ -51924,8 +62524,7 @@ var ts;
             var multiLine = node.multiLine;
             var numInitialProperties = countInitialNodesWithoutYield(properties);
             var temp = declareLocal();
-            emitAssignment(temp, ts.createObjectLiteral(ts.visitNodes(properties, visitor, ts.isObjectLiteralElementLike, 0, numInitialProperties), 
-            /*location*/ undefined, multiLine));
+            emitAssignment(temp, ts.createObjectLiteral(ts.visitNodes(properties, visitor, ts.isObjectLiteralElementLike, 0, numInitialProperties), multiLine));
             var expressions = ts.reduceLeft(properties, reduceProperty, [], numInitialProperties);
             expressions.push(multiLine ? ts.startOnNewLine(ts.getMutableClone(temp)) : temp);
             return ts.inlineExpressions(expressions);
@@ -51961,10 +62560,10 @@ var ts;
                 //  .yield resumeLabel
                 //  .mark resumeLabel
                 //      a = _a[%sent%]
-                var clone_7 = ts.getMutableClone(node);
-                clone_7.expression = cacheExpression(ts.visitNode(node.expression, visitor, ts.isLeftHandSideExpression));
-                clone_7.argumentExpression = ts.visitNode(node.argumentExpression, visitor, ts.isExpression);
-                return clone_7;
+                var clone_5 = ts.getMutableClone(node);
+                clone_5.expression = cacheExpression(ts.visitNode(node.expression, visitor, ts.isLeftHandSideExpression));
+                clone_5.argumentExpression = ts.visitNode(node.argumentExpression, visitor, ts.isExpression);
+                return clone_5;
             }
             return ts.visitEachChild(node, visitor, context);
         }
@@ -51981,7 +62580,7 @@ var ts;
                 //  .mark resumeLabel
                 //      _b.apply(_a, _c.concat([%sent%, 2]));
                 var _a = ts.createCallBinding(node.expression, hoistVariableDeclaration, languageVersion, /*cacheIdentifiers*/ true), target = _a.target, thisArg = _a.thisArg;
-                return ts.setOriginalNode(ts.createFunctionApply(cacheExpression(ts.visitNode(target, visitor, ts.isLeftHandSideExpression)), thisArg, visitElements(node.arguments, /*multiLine*/ false), 
+                return ts.setOriginalNode(ts.createFunctionApply(cacheExpression(ts.visitNode(target, visitor, ts.isLeftHandSideExpression)), thisArg, visitElements(node.arguments), 
                 /*location*/ node), node);
             }
             return ts.visitEachChild(node, visitor, context);
@@ -51999,9 +62598,9 @@ var ts;
                 //  .mark resumeLabel
                 //      new (_b.apply(_a, _c.concat([%sent%, 2])));
                 var _a = ts.createCallBinding(ts.createPropertyAccess(node.expression, "bind"), hoistVariableDeclaration), target = _a.target, thisArg = _a.thisArg;
-                return ts.setOriginalNode(ts.createNew(ts.createFunctionApply(cacheExpression(ts.visitNode(target, visitor, ts.isExpression)), thisArg, visitElements(node.arguments, /*multiLine*/ false)), 
-                /*typeArguments*/ undefined, [], 
-                /*location*/ node), node);
+                return ts.setOriginalNode(ts.setTextRange(ts.createNew(ts.createFunctionApply(cacheExpression(ts.visitNode(target, visitor, ts.isExpression)), thisArg, visitElements(node.arguments, 
+                /*leadingElement*/ ts.createVoidZero())), 
+                /*typeArguments*/ undefined, []), node), node);
             }
             return ts.visitEachChild(node, visitor, context);
         }
@@ -52030,38 +62629,38 @@ var ts;
         }
         function transformAndEmitStatementWorker(node) {
             switch (node.kind) {
-                case 199 /* Block */:
+                case 207 /* Block */:
                     return transformAndEmitBlock(node);
-                case 202 /* ExpressionStatement */:
+                case 210 /* ExpressionStatement */:
                     return transformAndEmitExpressionStatement(node);
-                case 203 /* IfStatement */:
+                case 211 /* IfStatement */:
                     return transformAndEmitIfStatement(node);
-                case 204 /* DoStatement */:
+                case 212 /* DoStatement */:
                     return transformAndEmitDoStatement(node);
-                case 205 /* WhileStatement */:
+                case 213 /* WhileStatement */:
                     return transformAndEmitWhileStatement(node);
-                case 206 /* ForStatement */:
+                case 214 /* ForStatement */:
                     return transformAndEmitForStatement(node);
-                case 207 /* ForInStatement */:
+                case 215 /* ForInStatement */:
                     return transformAndEmitForInStatement(node);
-                case 209 /* ContinueStatement */:
+                case 217 /* ContinueStatement */:
                     return transformAndEmitContinueStatement(node);
-                case 210 /* BreakStatement */:
+                case 218 /* BreakStatement */:
                     return transformAndEmitBreakStatement(node);
-                case 211 /* ReturnStatement */:
+                case 219 /* ReturnStatement */:
                     return transformAndEmitReturnStatement(node);
-                case 212 /* WithStatement */:
+                case 220 /* WithStatement */:
                     return transformAndEmitWithStatement(node);
-                case 213 /* SwitchStatement */:
+                case 221 /* SwitchStatement */:
                     return transformAndEmitSwitchStatement(node);
-                case 214 /* LabeledStatement */:
+                case 222 /* LabeledStatement */:
                     return transformAndEmitLabeledStatement(node);
-                case 215 /* ThrowStatement */:
+                case 223 /* ThrowStatement */:
                     return transformAndEmitThrowStatement(node);
-                case 216 /* TryStatement */:
+                case 224 /* TryStatement */:
                     return transformAndEmitTryStatement(node);
                 default:
-                    return emitStatement(ts.visitNode(node, visitor, ts.isStatement, /*optional*/ true));
+                    return emitStatement(ts.visitNode(node, visitor, ts.isStatement));
             }
         }
         function transformAndEmitBlock(node) {
@@ -52078,7 +62677,9 @@ var ts;
         function transformAndEmitVariableDeclarationList(node) {
             for (var _i = 0, _a = node.declarations; _i < _a.length; _i++) {
                 var variable = _a[_i];
-                hoistVariableDeclaration(variable.name);
+                var name_52 = ts.getSynthesizedClone(variable.name);
+                ts.setCommentRange(name_52, variable.name);
+                hoistVariableDeclaration(name_52);
             }
             var variables = ts.getInitializedVariables(node);
             var numVariables = variables.length;
@@ -52101,7 +62702,7 @@ var ts;
             return undefined;
         }
         function transformInitializedVariable(node) {
-            return ts.createAssignment(ts.getSynthesizedClone(node.name), ts.visitNode(node.initializer, visitor, ts.isExpression));
+            return ts.setSourceMapRange(ts.createAssignment(ts.setSourceMapRange(ts.getSynthesizedClone(node.name), node.name), ts.visitNode(node.initializer, visitor, ts.isExpression)), node);
         }
         function transformAndEmitIfStatement(node) {
             if (containsYield(node)) {
@@ -52121,7 +62722,7 @@ var ts;
                 if (containsYield(node.thenStatement) || containsYield(node.elseStatement)) {
                     var endLabel = defineLabel();
                     var elseLabel = node.elseStatement ? defineLabel() : undefined;
-                    emitBreakWhenFalse(node.elseStatement ? elseLabel : endLabel, ts.visitNode(node.expression, visitor, ts.isExpression));
+                    emitBreakWhenFalse(node.elseStatement ? elseLabel : endLabel, ts.visitNode(node.expression, visitor, ts.isExpression), /*location*/ node.expression);
                     transformAndEmitEmbeddedStatement(node.thenStatement);
                     if (node.elseStatement) {
                         emitBreak(endLabel);
@@ -52244,8 +62845,7 @@ var ts;
                         transformAndEmitVariableDeclarationList(initializer);
                     }
                     else {
-                        emitStatement(ts.createStatement(ts.visitNode(initializer, visitor, ts.isExpression), 
-                        /*location*/ initializer));
+                        emitStatement(ts.setTextRange(ts.createStatement(ts.visitNode(initializer, visitor, ts.isExpression)), initializer));
                     }
                 }
                 markLabel(conditionLabel);
@@ -52255,8 +62855,7 @@ var ts;
                 transformAndEmitEmbeddedStatement(node.statement);
                 markLabel(incrementLabel);
                 if (node.incrementor) {
-                    emitStatement(ts.createStatement(ts.visitNode(node.incrementor, visitor, ts.isExpression), 
-                    /*location*/ node.incrementor));
+                    emitStatement(ts.setTextRange(ts.createStatement(ts.visitNode(node.incrementor, visitor, ts.isExpression)), node.incrementor));
                 }
                 emitBreak(conditionLabel);
                 endLoopBlock();
@@ -52270,7 +62869,7 @@ var ts;
                 beginScriptLoopBlock();
             }
             var initializer = node.initializer;
-            if (ts.isVariableDeclarationList(initializer)) {
+            if (initializer && ts.isVariableDeclarationList(initializer)) {
                 for (var _i = 0, _a = initializer.declarations; _i < _a.length; _i++) {
                     var variable = _a[_i];
                     hoistVariableDeclaration(variable.name);
@@ -52278,7 +62877,7 @@ var ts;
                 var variables = ts.getInitializedVariables(initializer);
                 node = ts.updateFor(node, variables.length > 0
                     ? ts.inlineExpressions(ts.map(variables, transformInitializedVariable))
-                    : undefined, ts.visitNode(node.condition, visitor, ts.isExpression, /*optional*/ true), ts.visitNode(node.incrementor, visitor, ts.isExpression, /*optional*/ true), ts.visitNode(node.statement, visitor, ts.isStatement, /*optional*/ false, ts.liftToBlock));
+                    : undefined, ts.visitNode(node.condition, visitor, ts.isExpression), ts.visitNode(node.incrementor, visitor, ts.isExpression), ts.visitNode(node.statement, visitor, ts.isStatement, ts.liftToBlock));
             }
             else {
                 node = ts.visitEachChild(node, visitor, context);
@@ -52370,7 +62969,7 @@ var ts;
                     var variable = _a[_i];
                     hoistVariableDeclaration(variable.name);
                 }
-                node = ts.updateForIn(node, initializer.declarations[0].name, ts.visitNode(node.expression, visitor, ts.isExpression), ts.visitNode(node.statement, visitor, ts.isStatement, /*optional*/ false, ts.liftToBlock));
+                node = ts.updateForIn(node, initializer.declarations[0].name, ts.visitNode(node.expression, visitor, ts.isExpression), ts.visitNode(node.statement, visitor, ts.isStatement, ts.liftToBlock));
             }
             else {
                 node = ts.visitEachChild(node, visitor, context);
@@ -52409,11 +63008,11 @@ var ts;
             return ts.visitEachChild(node, visitor, context);
         }
         function transformAndEmitReturnStatement(node) {
-            emitReturn(ts.visitNode(node.expression, visitor, ts.isExpression, /*optional*/ true), 
+            emitReturn(ts.visitNode(node.expression, visitor, ts.isExpression), 
             /*location*/ node);
         }
         function visitReturnStatement(node) {
-            return createInlineReturn(ts.visitNode(node.expression, visitor, ts.isExpression, /*optional*/ true), 
+            return createInlineReturn(ts.visitNode(node.expression, visitor, ts.isExpression), 
             /*location*/ node);
         }
         function transformAndEmitWithStatement(node) {
@@ -52478,7 +63077,7 @@ var ts;
                 for (var i = 0; i < numClauses; i++) {
                     var clause = caseBlock.clauses[i];
                     clauseLabels.push(defineLabel());
-                    if (clause.kind === 250 /* DefaultClause */ && defaultClauseIndex === -1) {
+                    if (clause.kind === 258 /* DefaultClause */ && defaultClauseIndex === -1) {
                         defaultClauseIndex = i;
                     }
                 }
@@ -52491,7 +63090,7 @@ var ts;
                     var defaultClausesSkipped = 0;
                     for (var i = clausesWritten; i < numClauses; i++) {
                         var clause = caseBlock.clauses[i];
-                        if (clause.kind === 249 /* CaseClause */) {
+                        if (clause.kind === 257 /* CaseClause */) {
                             var caseClause = clause;
                             if (containsYield(caseClause.expression) && pendingClauses.length > 0) {
                                 break;
@@ -52622,7 +63221,7 @@ var ts;
             }
         }
         function containsYield(node) {
-            return node && (node.transformFlags & 4194304 /* ContainsYield */) !== 0;
+            return node && (node.transformFlags & 16777216 /* ContainsYield */) !== 0;
         }
         function countInitialNodesWithoutYield(nodes) {
             var numNodes = nodes.length;
@@ -52633,9 +63232,9 @@ var ts;
             }
             return -1;
         }
-        function onSubstituteNode(emitContext, node) {
-            node = previousOnSubstituteNode(emitContext, node);
-            if (emitContext === 1 /* Expression */) {
+        function onSubstituteNode(hint, node) {
+            node = previousOnSubstituteNode(hint, node);
+            if (hint === 1 /* Expression */) {
                 return substituteExpression(node);
             }
             return node;
@@ -52647,17 +63246,17 @@ var ts;
             return node;
         }
         function substituteExpressionIdentifier(node) {
-            if (renamedCatchVariables && ts.hasProperty(renamedCatchVariables, node.text)) {
+            if (!ts.isGeneratedIdentifier(node) && renamedCatchVariables && renamedCatchVariables.has(node.text)) {
                 var original = ts.getOriginalNode(node);
                 if (ts.isIdentifier(original) && original.parent) {
                     var declaration = resolver.getReferencedValueDeclaration(original);
                     if (declaration) {
-                        var name_38 = ts.getProperty(renamedCatchVariableDeclarations, String(ts.getOriginalNodeId(declaration)));
-                        if (name_38) {
-                            var clone_8 = ts.getMutableClone(name_38);
-                            ts.setSourceMapRange(clone_8, node);
-                            ts.setCommentRange(clone_8, node);
-                            return clone_8;
+                        var name_53 = renamedCatchVariableDeclarations[ts.getOriginalNodeId(declaration)];
+                        if (name_53) {
+                            var clone_6 = ts.getMutableClone(name_53);
+                            ts.setSourceMapRange(clone_6, node);
+                            ts.setCommentRange(clone_6, node);
+                            return clone_6;
                         }
                     }
                 }
@@ -52666,7 +63265,7 @@ var ts;
         }
         function cacheExpression(node) {
             var temp;
-            if (ts.isGeneratedIdentifier(node)) {
+            if (ts.isGeneratedIdentifier(node) || ts.getEmitFlags(node) & 4096 /* HelperName */) {
                 return node;
             }
             temp = ts.createTempVariable(hoistVariableDeclaration);
@@ -52794,15 +63393,23 @@ var ts;
          */
         function beginCatchBlock(variable) {
             ts.Debug.assert(peekBlockKind() === 0 /* Exception */);
-            var text = variable.name.text;
-            var name = declareLocal(text);
-            if (!renamedCatchVariables) {
-                renamedCatchVariables = ts.createMap();
-                renamedCatchVariableDeclarations = ts.createMap();
-                context.enableSubstitution(69 /* Identifier */);
-            }
-            renamedCatchVariables[text] = true;
-            renamedCatchVariableDeclarations[ts.getOriginalNodeId(variable)] = name;
+            // generated identifiers should already be unique within a file
+            var name;
+            if (ts.isGeneratedIdentifier(variable.name)) {
+                name = variable.name;
+                hoistVariableDeclaration(variable.name);
+            }
+            else {
+                var text = variable.name.text;
+                name = declareLocal(text);
+                if (!renamedCatchVariables) {
+                    renamedCatchVariables = ts.createMap();
+                    renamedCatchVariableDeclarations = [];
+                    context.enableSubstitution(71 /* Identifier */);
+                }
+                renamedCatchVariables.set(text, true);
+                renamedCatchVariableDeclarations[ts.getOriginalNodeId(variable)] = name;
+            }
             var exception = peekBlock();
             ts.Debug.assert(exception.state < 1 /* Catch */);
             var endLabel = exception.endLabel;
@@ -53056,7 +63663,7 @@ var ts;
                 if (labelExpressions === undefined) {
                     labelExpressions = [];
                 }
-                var expression = ts.createSynthesizedNode(8 /* NumericLiteral */);
+                var expression = ts.createLiteral(-1);
                 if (labelExpressions[label] === undefined) {
                     labelExpressions[label] = [expression];
                 }
@@ -53065,14 +63672,14 @@ var ts;
                 }
                 return expression;
             }
-            return ts.createNode(193 /* OmittedExpression */);
+            return ts.createOmittedExpression();
         }
         /**
          * Creates a numeric literal for the provided instruction.
          */
         function createInstruction(instruction) {
             var literal = ts.createLiteral(instruction);
-            literal.trailingComment = instructionNames[instruction];
+            ts.addSyntheticTrailingComment(literal, 3 /* MultiLineCommentTrivia */, getInstructionName(instruction));
             return literal;
         }
         /**
@@ -53083,10 +63690,10 @@ var ts;
          */
         function createInlineBreak(label, location) {
             ts.Debug.assert(label > 0, "Invalid label: " + label);
-            return ts.createReturn(ts.createArrayLiteral([
+            return ts.setTextRange(ts.createReturn(ts.createArrayLiteral([
                 createInstruction(3 /* Break */),
                 createLabel(label)
-            ]), location);
+            ])), location);
         }
         /**
          * Creates a statement that can be used indicate a Return operation.
@@ -53095,15 +63702,16 @@ var ts;
          * @param location An optional source map location for the statement.
          */
         function createInlineReturn(expression, location) {
-            return ts.createReturn(ts.createArrayLiteral(expression
+            return ts.setTextRange(ts.createReturn(ts.createArrayLiteral(expression
                 ? [createInstruction(2 /* Return */), expression]
-                : [createInstruction(2 /* Return */)]), location);
+                : [createInstruction(2 /* Return */)])), location);
         }
         /**
          * Creates an expression that can be used to resume from a Yield operation.
          */
         function createGeneratorResume(location) {
-            return ts.createCall(ts.createPropertyAccess(state, "sent"), /*typeArguments*/ undefined, [], location);
+            return ts.setTextRange(ts.createCall(ts.createPropertyAccess(state, "sent"), 
+            /*typeArguments*/ undefined, []), location);
         }
         /**
          * Emits an empty instruction.
@@ -53243,17 +63851,13 @@ var ts;
             currentExceptionBlock = undefined;
             withBlockStack = undefined;
             var buildResult = buildStatements();
-            return ts.createCall(ts.createHelperName(currentSourceFile.externalHelpersModuleName, "__generator"), 
-            /*typeArguments*/ undefined, [
-                ts.createThis(),
-                ts.setEmitFlags(ts.createFunctionExpression(
-                /*asteriskToken*/ undefined, 
-                /*name*/ undefined, 
-                /*typeParameters*/ undefined, [ts.createParameter(state)], 
-                /*type*/ undefined, ts.createBlock(buildResult, 
-                /*location*/ undefined, 
-                /*multiLine*/ buildResult.length > 0)), 4194304 /* ReuseTempVariableScope */)
-            ]);
+            return createGeneratorHelper(context, ts.setEmitFlags(ts.createFunctionExpression(
+            /*modifiers*/ undefined, 
+            /*asteriskToken*/ undefined, 
+            /*name*/ undefined, 
+            /*typeParameters*/ undefined, [ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, state)], 
+            /*type*/ undefined, ts.createBlock(buildResult, 
+            /*multiLine*/ buildResult.length > 0)), 524288 /* ReuseTempVariableScope */));
         }
         /**
          * Builds the statements for the generator function body.
@@ -53523,7 +64127,7 @@ var ts;
          * @param operationLocation The source map location for the operation.
          */
         function writeAssign(left, right, operationLocation) {
-            writeStatement(ts.createStatement(ts.createAssignment(left, right), operationLocation));
+            writeStatement(ts.setTextRange(ts.createStatement(ts.createAssignment(left, right)), operationLocation));
         }
         /**
          * Writes a Throw operation to the current label's statement list.
@@ -53534,7 +64138,7 @@ var ts;
         function writeThrow(expression, operationLocation) {
             lastOperationWasAbrupt = true;
             lastOperationWasCompletion = true;
-            writeStatement(ts.createThrow(expression, operationLocation));
+            writeStatement(ts.setTextRange(ts.createThrow(expression), operationLocation));
         }
         /**
          * Writes a Return operation to the current label's statement list.
@@ -53545,9 +64149,9 @@ var ts;
         function writeReturn(expression, operationLocation) {
             lastOperationWasAbrupt = true;
             lastOperationWasCompletion = true;
-            writeStatement(ts.createReturn(ts.createArrayLiteral(expression
+            writeStatement(ts.setEmitFlags(ts.setTextRange(ts.createReturn(ts.createArrayLiteral(expression
                 ? [createInstruction(2 /* Return */), expression]
-                : [createInstruction(2 /* Return */)]), operationLocation));
+                : [createInstruction(2 /* Return */)])), operationLocation), 384 /* NoTokenSourceMaps */));
         }
         /**
          * Writes a Break operation to the current label's statement list.
@@ -53557,10 +64161,10 @@ var ts;
          */
         function writeBreak(label, operationLocation) {
             lastOperationWasAbrupt = true;
-            writeStatement(ts.createReturn(ts.createArrayLiteral([
+            writeStatement(ts.setEmitFlags(ts.setTextRange(ts.createReturn(ts.createArrayLiteral([
                 createInstruction(3 /* Break */),
                 createLabel(label)
-            ]), operationLocation));
+            ])), operationLocation), 384 /* NoTokenSourceMaps */));
         }
         /**
          * Writes a BreakWhenTrue operation to the current label's statement list.
@@ -53570,10 +64174,10 @@ var ts;
          * @param operationLocation The source map location for the operation.
          */
         function writeBreakWhenTrue(label, condition, operationLocation) {
-            writeStatement(ts.createIf(condition, ts.createReturn(ts.createArrayLiteral([
+            writeStatement(ts.setEmitFlags(ts.createIf(condition, ts.setEmitFlags(ts.setTextRange(ts.createReturn(ts.createArrayLiteral([
                 createInstruction(3 /* Break */),
                 createLabel(label)
-            ]), operationLocation)));
+            ])), operationLocation), 384 /* NoTokenSourceMaps */)), 1 /* SingleLine */));
         }
         /**
          * Writes a BreakWhenFalse operation to the current label's statement list.
@@ -53583,10 +64187,10 @@ var ts;
          * @param operationLocation The source map location for the operation.
          */
         function writeBreakWhenFalse(label, condition, operationLocation) {
-            writeStatement(ts.createIf(ts.createLogicalNot(condition), ts.createReturn(ts.createArrayLiteral([
+            writeStatement(ts.setEmitFlags(ts.createIf(ts.createLogicalNot(condition), ts.setEmitFlags(ts.setTextRange(ts.createReturn(ts.createArrayLiteral([
                 createInstruction(3 /* Break */),
                 createLabel(label)
-            ]), operationLocation)));
+            ])), operationLocation), 384 /* NoTokenSourceMaps */)), 1 /* SingleLine */));
         }
         /**
          * Writes a Yield operation to the current label's statement list.
@@ -53596,9 +64200,9 @@ var ts;
          */
         function writeYield(expression, operationLocation) {
             lastOperationWasAbrupt = true;
-            writeStatement(ts.createReturn(ts.createArrayLiteral(expression
+            writeStatement(ts.setEmitFlags(ts.setTextRange(ts.createReturn(ts.createArrayLiteral(expression
                 ? [createInstruction(4 /* Yield */), expression]
-                : [createInstruction(4 /* Yield */)]), operationLocation));
+                : [createInstruction(4 /* Yield */)])), operationLocation), 384 /* NoTokenSourceMaps */));
         }
         /**
          * Writes a YieldStar instruction to the current label's statement list.
@@ -53608,10 +64212,10 @@ var ts;
          */
         function writeYieldStar(expression, operationLocation) {
             lastOperationWasAbrupt = true;
-            writeStatement(ts.createReturn(ts.createArrayLiteral([
+            writeStatement(ts.setEmitFlags(ts.setTextRange(ts.createReturn(ts.createArrayLiteral([
                 createInstruction(5 /* YieldStar */),
                 expression
-            ]), operationLocation));
+            ])), operationLocation), 384 /* NoTokenSourceMaps */));
         }
         /**
          * Writes an Endfinally instruction to the current label's statement list.
@@ -53624,21 +64228,204 @@ var ts;
         }
     }
     ts.transformGenerators = transformGenerators;
-    var _a;
+    function createGeneratorHelper(context, body) {
+        context.requestEmitHelper(generatorHelper);
+        return ts.createCall(ts.getHelperName("__generator"), 
+        /*typeArguments*/ undefined, [ts.createThis(), body]);
+    }
+    // The __generator helper is used by down-level transformations to emulate the runtime
+    // semantics of an ES2015 generator function. When called, this helper returns an
+    // object that implements the Iterator protocol, in that it has `next`, `return`, and
+    // `throw` methods that step through the generator when invoked.
+    //
+    // parameters:
+    //  thisArg  The value to use as the `this` binding for the transformed generator body.
+    //  body     A function that acts as the transformed generator body.
+    //
+    // variables:
+    //  _       Persistent state for the generator that is shared between the helper and the
+    //          generator body. The state object has the following members:
+    //            sent() - A method that returns or throws the current completion value.
+    //            label  - The next point at which to resume evaluation of the generator body.
+    //            trys   - A stack of protected regions (try/catch/finally blocks).
+    //            ops    - A stack of pending instructions when inside of a finally block.
+    //  f       A value indicating whether the generator is executing.
+    //  y       An iterator to delegate for a yield*.
+    //  t       A temporary variable that holds one of the following values (note that these
+    //          cases do not overlap):
+    //          - The completion value when resuming from a `yield` or `yield*`.
+    //          - The error value for a catch block.
+    //          - The current protected region (array of try/catch/finally/end labels).
+    //          - The verb (`next`, `throw`, or `return` method) to delegate to the expression
+    //            of a `yield*`.
+    //          - The result of evaluating the verb delegated to the expression of a `yield*`.
+    //
+    // functions:
+    //  verb(n)     Creates a bound callback to the `step` function for opcode `n`.
+    //  step(op)    Evaluates opcodes in a generator body until execution is suspended or
+    //              completed.
+    //
+    // The __generator helper understands a limited set of instructions:
+    //  0: next(value?)     - Start or resume the generator with the specified value.
+    //  1: throw(error)     - Resume the generator with an exception. If the generator is
+    //                        suspended inside of one or more protected regions, evaluates
+    //                        any intervening finally blocks between the current label and
+    //                        the nearest catch block or function boundary. If uncaught, the
+    //                        exception is thrown to the caller.
+    //  2: return(value?)   - Resume the generator as if with a return. If the generator is
+    //                        suspended inside of one or more protected regions, evaluates any
+    //                        intervening finally blocks.
+    //  3: break(label)     - Jump to the specified label. If the label is outside of the
+    //                        current protected region, evaluates any intervening finally
+    //                        blocks.
+    //  4: yield(value?)    - Yield execution to the caller with an optional value. When
+    //                        resumed, the generator will continue at the next label.
+    //  5: yield*(value)    - Delegates evaluation to the supplied iterator. When
+    //                        delegation completes, the generator will continue at the next
+    //                        label.
+    //  6: catch(error)     - Handles an exception thrown from within the generator body. If
+    //                        the current label is inside of one or more protected regions,
+    //                        evaluates any intervening finally blocks between the current
+    //                        label and the nearest catch block or function boundary. If
+    //                        uncaught, the exception is thrown to the caller.
+    //  7: endfinally       - Ends a finally block, resuming the last instruction prior to
+    //                        entering a finally block.
+    //
+    // For examples of how these are used, see the comments in ./transformers/generators.ts
+    var generatorHelper = {
+        name: "typescript:generator",
+        scoped: false,
+        priority: 6,
+        text: "\n            var __generator = (this && this.__generator) || function (thisArg, body) {\n                var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;\n                return g = { next: verb(0), \"throw\": verb(1), \"return\": verb(2) }, typeof Symbol === \"function\" && (g[Symbol.iterator] = function() { return this; }), g;\n                function verb(n) { return function (v) { return step([n, v]); }; }\n                function step(op) {\n                    if (f) throw new TypeError(\"Generator is already executing.\");\n                    while (_) try {\n                        if (f = 1, y && (t = y[op[0] & 2 ? \"return\" : op[0] ? \"throw\" : \"next\"]) && !(t = t.call(y, op[1])).done) return t;\n                        if (y = 0, t) op = [0, t.value];\n                        switch (op[0]) {\n                            case 0: case 1: t = op; break;\n                            case 4: _.label++; return { value: op[1], done: false };\n                            case 5: _.label++; y = op[1]; op = [0]; continue;\n                            case 7: op = _.ops.pop(); _.trys.pop(); continue;\n                            default:\n                                if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }\n                                if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }\n                                if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }\n                                if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }\n                                if (t[2]) _.ops.pop();\n                                _.trys.pop(); continue;\n                        }\n                        op = body.call(thisArg, _);\n                    } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }\n                    if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };\n                }\n            };"
+    };
+})(ts || (ts = {}));
+/// <reference path="../factory.ts" />
+/// <reference path="../visitor.ts" />
+/*@internal*/
+var ts;
+(function (ts) {
+    /**
+     * Transforms ES5 syntax into ES3 syntax.
+     *
+     * @param context Context and state information for the transformation.
+     */
+    function transformES5(context) {
+        var compilerOptions = context.getCompilerOptions();
+        // enable emit notification only if using --jsx preserve or react-native
+        var previousOnEmitNode;
+        var noSubstitution;
+        if (compilerOptions.jsx === 1 /* Preserve */ || compilerOptions.jsx === 3 /* ReactNative */) {
+            previousOnEmitNode = context.onEmitNode;
+            context.onEmitNode = onEmitNode;
+            context.enableEmitNotification(251 /* JsxOpeningElement */);
+            context.enableEmitNotification(252 /* JsxClosingElement */);
+            context.enableEmitNotification(250 /* JsxSelfClosingElement */);
+            noSubstitution = [];
+        }
+        var previousOnSubstituteNode = context.onSubstituteNode;
+        context.onSubstituteNode = onSubstituteNode;
+        context.enableSubstitution(179 /* PropertyAccessExpression */);
+        context.enableSubstitution(261 /* PropertyAssignment */);
+        return transformSourceFile;
+        /**
+         * Transforms an ES5 source file to ES3.
+         *
+         * @param node A SourceFile
+         */
+        function transformSourceFile(node) {
+            return node;
+        }
+        /**
+         * Called by the printer just before a node is printed.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to emit.
+         * @param emitCallback A callback used to emit the node.
+         */
+        function onEmitNode(hint, node, emitCallback) {
+            switch (node.kind) {
+                case 251 /* JsxOpeningElement */:
+                case 252 /* JsxClosingElement */:
+                case 250 /* JsxSelfClosingElement */:
+                    var tagName = node.tagName;
+                    noSubstitution[ts.getOriginalNodeId(tagName)] = true;
+                    break;
+            }
+            previousOnEmitNode(hint, node, emitCallback);
+        }
+        /**
+         * Hooks node substitutions.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to substitute.
+         */
+        function onSubstituteNode(hint, node) {
+            if (node.id && noSubstitution && noSubstitution[node.id]) {
+                return previousOnSubstituteNode(hint, node);
+            }
+            node = previousOnSubstituteNode(hint, node);
+            if (ts.isPropertyAccessExpression(node)) {
+                return substitutePropertyAccessExpression(node);
+            }
+            else if (ts.isPropertyAssignment(node)) {
+                return substitutePropertyAssignment(node);
+            }
+            return node;
+        }
+        /**
+         * Substitutes a PropertyAccessExpression whose name is a reserved word.
+         *
+         * @param node A PropertyAccessExpression
+         */
+        function substitutePropertyAccessExpression(node) {
+            var literalName = trySubstituteReservedName(node.name);
+            if (literalName) {
+                return ts.setTextRange(ts.createElementAccess(node.expression, literalName), node);
+            }
+            return node;
+        }
+        /**
+         * Substitutes a PropertyAssignment whose name is a reserved word.
+         *
+         * @param node A PropertyAssignment
+         */
+        function substitutePropertyAssignment(node) {
+            var literalName = ts.isIdentifier(node.name) && trySubstituteReservedName(node.name);
+            if (literalName) {
+                return ts.updatePropertyAssignment(node, literalName, node.initializer);
+            }
+            return node;
+        }
+        /**
+         * If an identifier name is a reserved word, returns a string literal for the name.
+         *
+         * @param name An Identifier
+         */
+        function trySubstituteReservedName(name) {
+            var token = name.originalKeywordKind || (ts.nodeIsSynthesized(name) ? ts.stringToToken(name.text) : undefined);
+            if (token >= 72 /* FirstReservedWord */ && token <= 107 /* LastReservedWord */) {
+                return ts.setTextRange(ts.createLiteral(name), name);
+            }
+            return undefined;
+        }
+    }
+    ts.transformES5 = transformES5;
 })(ts || (ts = {}));
 /// <reference path="../../factory.ts" />
 /// <reference path="../../visitor.ts" />
+/// <reference path="../destructuring.ts" />
 /*@internal*/
 var ts;
 (function (ts) {
     function transformModule(context) {
-        var transformModuleDelegates = ts.createMap((_a = {},
-            _a[ts.ModuleKind.None] = transformCommonJSModule,
-            _a[ts.ModuleKind.CommonJS] = transformCommonJSModule,
-            _a[ts.ModuleKind.AMD] = transformAMDModule,
-            _a[ts.ModuleKind.UMD] = transformUMDModule,
-            _a));
-        var startLexicalEnvironment = context.startLexicalEnvironment, endLexicalEnvironment = context.endLexicalEnvironment, hoistVariableDeclaration = context.hoistVariableDeclaration;
+        function getTransformModuleDelegate(moduleKind) {
+            switch (moduleKind) {
+                case ts.ModuleKind.AMD: return transformAMDModule;
+                case ts.ModuleKind.UMD: return transformUMDModule;
+                default: return transformCommonJSModule;
+            }
+        }
+        var startLexicalEnvironment = context.startLexicalEnvironment, endLexicalEnvironment = context.endLexicalEnvironment;
         var compilerOptions = context.getCompilerOptions();
         var resolver = context.getEmitResolver();
         var host = context.getEmitHost();
@@ -53648,21 +64435,18 @@ var ts;
         var previousOnEmitNode = context.onEmitNode;
         context.onSubstituteNode = onSubstituteNode;
         context.onEmitNode = onEmitNode;
-        context.enableSubstitution(69 /* Identifier */);
-        context.enableSubstitution(187 /* BinaryExpression */);
-        context.enableSubstitution(185 /* PrefixUnaryExpression */);
-        context.enableSubstitution(186 /* PostfixUnaryExpression */);
-        context.enableSubstitution(254 /* ShorthandPropertyAssignment */);
-        context.enableEmitNotification(256 /* SourceFile */);
-        var currentSourceFile;
-        var externalImports;
-        var exportSpecifiers;
-        var exportEquals;
-        var bindingNameExportSpecifiersMap;
-        // Subset of exportSpecifiers that is a binding-name.
-        // This is to reduce amount of memory we have to keep around even after we done with module-transformer
-        var bindingNameExportSpecifiersForFileMap = ts.createMap();
-        var hasExportStarsToExportValues;
+        context.enableSubstitution(71 /* Identifier */); // Substitutes expression identifiers with imported/exported symbols.
+        context.enableSubstitution(194 /* BinaryExpression */); // Substitutes assignments to exported symbols.
+        context.enableSubstitution(192 /* PrefixUnaryExpression */); // Substitutes updates to exported symbols.
+        context.enableSubstitution(193 /* PostfixUnaryExpression */); // Substitutes updates to exported symbols.
+        context.enableSubstitution(262 /* ShorthandPropertyAssignment */); // Substitutes shorthand property assignments for imported/exported symbols.
+        context.enableEmitNotification(265 /* SourceFile */); // Restore state when substituting nodes in a file.
+        var moduleInfoMap = []; // The ExternalModuleInfo for each file.
+        var deferredExports = []; // Exports to defer until an EndOfDeclarationMarker is found.
+        var currentSourceFile; // The current file.
+        var currentModuleInfo; // The ExternalModuleInfo for the current file.
+        var noSubstitution; // Set of nodes for which substitution rules should be ignored.
+        var needUMDDynamicImportHelper;
         return transformSourceFile;
         /**
          * Transforms the module aspects of a SourceFile.
@@ -53670,26 +64454,25 @@ var ts;
          * @param node The SourceFile node.
          */
         function transformSourceFile(node) {
-            if (ts.isDeclarationFile(node)) {
+            if (node.isDeclarationFile || !(ts.isExternalModule(node) || compilerOptions.isolatedModules || node.transformFlags & 67108864 /* ContainsDynamicImport */)) {
                 return node;
             }
-            if (ts.isExternalModule(node) || compilerOptions.isolatedModules) {
-                currentSourceFile = node;
-                // Collect information about the external module.
-                (_a = ts.collectExternalModuleInfo(node, resolver), externalImports = _a.externalImports, exportSpecifiers = _a.exportSpecifiers, exportEquals = _a.exportEquals, hasExportStarsToExportValues = _a.hasExportStarsToExportValues, _a);
-                // Perform the transformation.
-                var transformModule_1 = transformModuleDelegates[moduleKind] || transformModuleDelegates[ts.ModuleKind.None];
-                var updated = transformModule_1(node);
-                ts.aggregateTransformFlags(updated);
-                currentSourceFile = undefined;
-                externalImports = undefined;
-                exportSpecifiers = undefined;
-                exportEquals = undefined;
-                hasExportStarsToExportValues = false;
-                return updated;
+            currentSourceFile = node;
+            currentModuleInfo = ts.collectExternalModuleInfo(node, resolver, compilerOptions);
+            moduleInfoMap[ts.getOriginalNodeId(node)] = currentModuleInfo;
+            // Perform the transformation.
+            var transformModule = getTransformModuleDelegate(moduleKind);
+            var updated = transformModule(node);
+            currentSourceFile = undefined;
+            currentModuleInfo = undefined;
+            needUMDDynamicImportHelper = false;
+            return ts.aggregateTransformFlags(updated);
+        }
+        function shouldEmitUnderscoreUnderscoreESModule() {
+            if (!currentModuleInfo.exportEquals && ts.isExternalModule(currentSourceFile)) {
+                return true;
             }
-            return node;
-            var _a;
+            return false;
         }
         /**
          * Transforms a SourceFile into a CommonJS module.
@@ -53699,14 +64482,22 @@ var ts;
         function transformCommonJSModule(node) {
             startLexicalEnvironment();
             var statements = [];
-            var statementOffset = ts.addPrologueDirectives(statements, node.statements, /*ensureUseStrict*/ !compilerOptions.noImplicitUseStrict, visitor);
-            ts.addRange(statements, ts.visitNodes(node.statements, visitor, ts.isStatement, statementOffset));
-            ts.addRange(statements, endLexicalEnvironment());
+            var ensureUseStrict = compilerOptions.alwaysStrict || (!compilerOptions.noImplicitUseStrict && ts.isExternalModule(currentSourceFile));
+            var statementOffset = ts.addPrologue(statements, node.statements, ensureUseStrict, sourceElementVisitor);
+            if (shouldEmitUnderscoreUnderscoreESModule()) {
+                ts.append(statements, createUnderscoreUnderscoreESModule());
+            }
+            ts.append(statements, ts.visitNode(currentModuleInfo.externalHelpersImportDeclaration, sourceElementVisitor, ts.isStatement));
+            ts.addRange(statements, ts.visitNodes(node.statements, sourceElementVisitor, ts.isStatement, statementOffset));
             addExportEqualsIfNeeded(statements, /*emitAsReturn*/ false);
-            var updated = updateSourceFile(node, statements);
-            if (hasExportStarsToExportValues) {
-                ts.setEmitFlags(updated, 2 /* EmitExportStar */ | ts.getEmitFlags(node));
+            ts.addRange(statements, endLexicalEnvironment());
+            var updated = ts.updateSourceFileNode(node, ts.setTextRange(ts.createNodeArray(statements), node.statements));
+            if (currentModuleInfo.hasExportStarsToExportValues && !compilerOptions.importHelpers) {
+                // If we have any `export * from ...` declarations
+                // we need to inform the emitter to add the __export helper.
+                ts.addEmitHelper(updated, exportStarHelper);
             }
+            ts.addEmitHelpers(updated, context.readEmitHelpers());
             return updated;
         }
         /**
@@ -53717,27 +64508,6 @@ var ts;
         function transformAMDModule(node) {
             var define = ts.createIdentifier("define");
             var moduleName = ts.tryGetModuleNameFromFile(node, host, compilerOptions);
-            return transformAsynchronousModule(node, define, moduleName, /*includeNonAmdDependencies*/ true);
-        }
-        /**
-         * Transforms a SourceFile into a UMD module.
-         *
-         * @param node The SourceFile node.
-         */
-        function transformUMDModule(node) {
-            var define = ts.createIdentifier("define");
-            ts.setEmitFlags(define, 16 /* UMDDefine */);
-            return transformAsynchronousModule(node, define, /*moduleName*/ undefined, /*includeNonAmdDependencies*/ false);
-        }
-        /**
-         * Transforms a SourceFile into an AMD or UMD module.
-         *
-         * @param node The SourceFile node.
-         * @param define The expression used to define the module.
-         * @param moduleName An expression for the module name, if available.
-         * @param includeNonAmdDependencies A value indicating whether to incldue any non-AMD dependencies.
-         */
-        function transformAsynchronousModule(node, define, moduleName, includeNonAmdDependencies) {
             // An AMD define function has the following shape:
             //
             //     define(id?, dependencies?, factory);
@@ -53758,11 +64528,11 @@ var ts;
             //     /// <amd-dependency path= "a.css" />
             //
             // we need to add modules without alias names to the end of the dependencies list
-            var _a = collectAsynchronousDependencies(node, includeNonAmdDependencies), aliasedModuleNames = _a.aliasedModuleNames, unaliasedModuleNames = _a.unaliasedModuleNames, importAliasNames = _a.importAliasNames;
+            var _a = collectAsynchronousDependencies(node, /*includeNonAmdDependencies*/ true), aliasedModuleNames = _a.aliasedModuleNames, unaliasedModuleNames = _a.unaliasedModuleNames, importAliasNames = _a.importAliasNames;
             // Create an updated SourceFile:
             //
             //     define(moduleName?, ["module1", "module2"], function ...
-            return updateSourceFile(node, [
+            return ts.updateSourceFileNode(node, ts.setTextRange(ts.createNodeArray([
                 ts.createStatement(ts.createCall(define, 
                 /*typeArguments*/ undefined, (moduleName ? [moduleName] : []).concat([
                     // Add the dependency array argument:
@@ -53776,15 +64546,134 @@ var ts;
                     //
                     //     function (require, exports, module1, module2) ...
                     ts.createFunctionExpression(
+                    /*modifiers*/ undefined, 
                     /*asteriskToken*/ undefined, 
                     /*name*/ undefined, 
                     /*typeParameters*/ undefined, [
-                        ts.createParameter("require"),
-                        ts.createParameter("exports")
+                        ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, "require"),
+                        ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, "exports")
                     ].concat(importAliasNames), 
                     /*type*/ undefined, transformAsynchronousModuleBody(node))
                 ])))
-            ]);
+            ]), 
+            /*location*/ node.statements));
+        }
+        /**
+         * Transforms a SourceFile into a UMD module.
+         *
+         * @param node The SourceFile node.
+         */
+        function transformUMDModule(node) {
+            var _a = collectAsynchronousDependencies(node, /*includeNonAmdDependencies*/ false), aliasedModuleNames = _a.aliasedModuleNames, unaliasedModuleNames = _a.unaliasedModuleNames, importAliasNames = _a.importAliasNames;
+            var umdHeader = ts.createFunctionExpression(
+            /*modifiers*/ undefined, 
+            /*asteriskToken*/ undefined, 
+            /*name*/ undefined, 
+            /*typeParameters*/ undefined, [ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, "factory")], 
+            /*type*/ undefined, ts.setTextRange(ts.createBlock([
+                ts.createIf(ts.createLogicalAnd(ts.createTypeCheck(ts.createIdentifier("module"), "object"), ts.createTypeCheck(ts.createPropertyAccess(ts.createIdentifier("module"), "exports"), "object")), ts.createBlock([
+                    ts.createVariableStatement(
+                    /*modifiers*/ undefined, [
+                        ts.createVariableDeclaration("v", 
+                        /*type*/ undefined, ts.createCall(ts.createIdentifier("factory"), 
+                        /*typeArguments*/ undefined, [
+                            ts.createIdentifier("require"),
+                            ts.createIdentifier("exports")
+                        ]))
+                    ]),
+                    ts.setEmitFlags(ts.createIf(ts.createStrictInequality(ts.createIdentifier("v"), ts.createIdentifier("undefined")), ts.createStatement(ts.createAssignment(ts.createPropertyAccess(ts.createIdentifier("module"), "exports"), ts.createIdentifier("v")))), 1 /* SingleLine */)
+                ]), ts.createIf(ts.createLogicalAnd(ts.createTypeCheck(ts.createIdentifier("define"), "function"), ts.createPropertyAccess(ts.createIdentifier("define"), "amd")), ts.createBlock([
+                    ts.createStatement(ts.createCall(ts.createIdentifier("define"), 
+                    /*typeArguments*/ undefined, [
+                        ts.createArrayLiteral([
+                            ts.createLiteral("require"),
+                            ts.createLiteral("exports")
+                        ].concat(aliasedModuleNames, unaliasedModuleNames)),
+                        ts.createIdentifier("factory")
+                    ]))
+                ])))
+            ], 
+            /*multiLine*/ true), 
+            /*location*/ undefined));
+            // Create an updated SourceFile:
+            //
+            //  (function (factory) {
+            //      if (typeof module === "object" && typeof module.exports === "object") {
+            //          var v = factory(require, exports);
+            //          if (v !== undefined) module.exports = v;
+            //      }
+            //      else if (typeof define === 'function' && define.amd) {
+            //          define(["require", "exports"], factory);
+            //      }
+            //  })(function ...)
+            return ts.updateSourceFileNode(node, ts.setTextRange(ts.createNodeArray([
+                ts.createStatement(ts.createCall(umdHeader, 
+                /*typeArguments*/ undefined, [
+                    // Add the module body function argument:
+                    //
+                    //     function (require, exports) ...
+                    ts.createFunctionExpression(
+                    /*modifiers*/ undefined, 
+                    /*asteriskToken*/ undefined, 
+                    /*name*/ undefined, 
+                    /*typeParameters*/ undefined, [
+                        ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, "require"),
+                        ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, "exports")
+                    ].concat(importAliasNames), 
+                    /*type*/ undefined, transformAsynchronousModuleBody(node))
+                ]))
+            ]), 
+            /*location*/ node.statements));
+        }
+        /**
+         * Collect the additional asynchronous dependencies for the module.
+         *
+         * @param node The source file.
+         * @param includeNonAmdDependencies A value indicating whether to include non-AMD dependencies.
+         */
+        function collectAsynchronousDependencies(node, includeNonAmdDependencies) {
+            // names of modules with corresponding parameter in the factory function
+            var aliasedModuleNames = [];
+            // names of modules with no corresponding parameters in factory function
+            var unaliasedModuleNames = [];
+            // names of the parameters in the factory function; these
+            // parameters need to match the indexes of the corresponding
+            // module names in aliasedModuleNames.
+            var importAliasNames = [];
+            // Fill in amd-dependency tags
+            for (var _i = 0, _a = node.amdDependencies; _i < _a.length; _i++) {
+                var amdDependency = _a[_i];
+                if (amdDependency.name) {
+                    aliasedModuleNames.push(ts.createLiteral(amdDependency.path));
+                    importAliasNames.push(ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, amdDependency.name));
+                }
+                else {
+                    unaliasedModuleNames.push(ts.createLiteral(amdDependency.path));
+                }
+            }
+            for (var _b = 0, _c = currentModuleInfo.externalImports; _b < _c.length; _b++) {
+                var importNode = _c[_b];
+                // Find the name of the external module
+                var externalModuleName = ts.getExternalModuleNameLiteral(importNode, currentSourceFile, host, resolver, compilerOptions);
+                // Find the name of the module alias, if there is one
+                var importAliasName = ts.getLocalNameForExternalImport(importNode, currentSourceFile);
+                // It is possible that externalModuleName is undefined if it is not string literal.
+                // This can happen in the invalid import syntax.
+                // E.g : "import * from alias from 'someLib';"
+                if (externalModuleName) {
+                    if (includeNonAmdDependencies && importAliasName) {
+                        // Set emitFlags on the name of the classDeclaration
+                        // This is so that when printer will not substitute the identifier
+                        ts.setEmitFlags(importAliasName, 4 /* NoSubstitution */);
+                        aliasedModuleNames.push(externalModuleName);
+                        importAliasNames.push(ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, importAliasName));
+                    }
+                    else {
+                        unaliasedModuleNames.push(externalModuleName);
+                    }
+                }
+            }
+            return { aliasedModuleNames: aliasedModuleNames, unaliasedModuleNames: unaliasedModuleNames, importAliasNames: importAliasNames };
         }
         /**
          * Transforms a SourceFile into an AMD or UMD module body.
@@ -53794,83 +64683,175 @@ var ts;
         function transformAsynchronousModuleBody(node) {
             startLexicalEnvironment();
             var statements = [];
-            var statementOffset = ts.addPrologueDirectives(statements, node.statements, /*ensureUseStrict*/ !compilerOptions.noImplicitUseStrict, visitor);
+            var statementOffset = ts.addPrologue(statements, node.statements, /*ensureUseStrict*/ !compilerOptions.noImplicitUseStrict, sourceElementVisitor);
+            if (shouldEmitUnderscoreUnderscoreESModule()) {
+                ts.append(statements, createUnderscoreUnderscoreESModule());
+            }
             // Visit each statement of the module body.
-            ts.addRange(statements, ts.visitNodes(node.statements, visitor, ts.isStatement, statementOffset));
+            ts.append(statements, ts.visitNode(currentModuleInfo.externalHelpersImportDeclaration, sourceElementVisitor, ts.isStatement));
+            ts.addRange(statements, ts.visitNodes(node.statements, sourceElementVisitor, ts.isStatement, statementOffset));
+            // Append the 'export =' statement if provided.
+            addExportEqualsIfNeeded(statements, /*emitAsReturn*/ true);
             // End the lexical environment for the module body
             // and merge any new lexical declarations.
             ts.addRange(statements, endLexicalEnvironment());
-            // Append the 'export =' statement if provided.
-            addExportEqualsIfNeeded(statements, /*emitAsReturn*/ true);
-            var body = ts.createBlock(statements, /*location*/ undefined, /*multiLine*/ true);
-            if (hasExportStarsToExportValues) {
+            var body = ts.createBlock(statements, /*multiLine*/ true);
+            if (currentModuleInfo.hasExportStarsToExportValues && !compilerOptions.importHelpers) {
                 // If we have any `export * from ...` declarations
                 // we need to inform the emitter to add the __export helper.
-                ts.setEmitFlags(body, 2 /* EmitExportStar */);
+                ts.addEmitHelper(body, exportStarHelper);
+            }
+            if (needUMDDynamicImportHelper) {
+                ts.addEmitHelper(body, dynamicImportUMDHelper);
             }
             return body;
         }
+        /**
+         * Adds the down-level representation of `export=` to the statement list if one exists
+         * in the source file.
+         *
+         * @param statements The Statement list to modify.
+         * @param emitAsReturn A value indicating whether to emit the `export=` statement as a
+         * return statement.
+         */
         function addExportEqualsIfNeeded(statements, emitAsReturn) {
-            if (exportEquals && resolver.isValueAliasDeclaration(exportEquals)) {
+            if (currentModuleInfo.exportEquals) {
                 if (emitAsReturn) {
-                    var statement = ts.createReturn(exportEquals.expression, 
-                    /*location*/ exportEquals);
-                    ts.setEmitFlags(statement, 12288 /* NoTokenSourceMaps */ | 49152 /* NoComments */);
+                    var statement = ts.createReturn(currentModuleInfo.exportEquals.expression);
+                    ts.setTextRange(statement, currentModuleInfo.exportEquals);
+                    ts.setEmitFlags(statement, 384 /* NoTokenSourceMaps */ | 1536 /* NoComments */);
                     statements.push(statement);
                 }
                 else {
-                    var statement = ts.createStatement(ts.createAssignment(ts.createPropertyAccess(ts.createIdentifier("module"), "exports"), exportEquals.expression), 
-                    /*location*/ exportEquals);
-                    ts.setEmitFlags(statement, 49152 /* NoComments */);
+                    var statement = ts.createStatement(ts.createAssignment(ts.createPropertyAccess(ts.createIdentifier("module"), "exports"), currentModuleInfo.exportEquals.expression));
+                    ts.setTextRange(statement, currentModuleInfo.exportEquals);
+                    ts.setEmitFlags(statement, 1536 /* NoComments */);
                     statements.push(statement);
                 }
             }
         }
+        //
+        // Top-Level Source Element Visitors
+        //
         /**
          * Visits a node at the top level of the source file.
          *
-         * @param node The node.
+         * @param node The node to visit.
          */
-        function visitor(node) {
+        function sourceElementVisitor(node) {
             switch (node.kind) {
-                case 230 /* ImportDeclaration */:
+                case 238 /* ImportDeclaration */:
                     return visitImportDeclaration(node);
-                case 229 /* ImportEqualsDeclaration */:
+                case 237 /* ImportEqualsDeclaration */:
                     return visitImportEqualsDeclaration(node);
-                case 236 /* ExportDeclaration */:
+                case 244 /* ExportDeclaration */:
                     return visitExportDeclaration(node);
-                case 235 /* ExportAssignment */:
+                case 243 /* ExportAssignment */:
                     return visitExportAssignment(node);
-                case 200 /* VariableStatement */:
+                case 208 /* VariableStatement */:
                     return visitVariableStatement(node);
-                case 220 /* FunctionDeclaration */:
+                case 228 /* FunctionDeclaration */:
                     return visitFunctionDeclaration(node);
-                case 221 /* ClassDeclaration */:
+                case 229 /* ClassDeclaration */:
                     return visitClassDeclaration(node);
-                case 202 /* ExpressionStatement */:
-                    return visitExpressionStatement(node);
+                case 299 /* MergeDeclarationMarker */:
+                    return visitMergeDeclarationMarker(node);
+                case 300 /* EndOfDeclarationMarker */:
+                    return visitEndOfDeclarationMarker(node);
                 default:
-                    // This visitor does not descend into the tree, as export/import statements
-                    // are only transformed at the top level of a file.
-                    return node;
+                    return ts.visitEachChild(node, importCallExpressionVisitor, context);
+            }
+        }
+        function importCallExpressionVisitor(node) {
+            // This visitor does not need to descend into the tree if there is no dynamic import,
+            // as export/import statements are only transformed at the top level of a file.
+            if (!(node.transformFlags & 67108864 /* ContainsDynamicImport */)) {
+                return node;
+            }
+            if (ts.isImportCall(node)) {
+                return visitImportCallExpression(node);
+            }
+            else {
+                return ts.visitEachChild(node, importCallExpressionVisitor, context);
+            }
+        }
+        function visitImportCallExpression(node) {
+            switch (compilerOptions.module) {
+                case ts.ModuleKind.AMD:
+                    return transformImportCallExpressionAMD(node);
+                case ts.ModuleKind.UMD:
+                    return transformImportCallExpressionUMD(node);
+                case ts.ModuleKind.CommonJS:
+                default:
+                    return transformImportCallExpressionCommonJS(node);
             }
         }
+        function transformImportCallExpressionUMD(node) {
+            // (function (factory) {
+            //      ... (regular UMD)
+            // }
+            // })(function (require, exports, useSyncRequire) {
+            //      "use strict";
+            //      Object.defineProperty(exports, "__esModule", { value: true });
+            //      var __syncRequire = typeof module === "object" && typeof module.exports === "object";
+            //      var __resolved = new Promise(function (resolve) { resolve(); });
+            //      .....
+            //      __syncRequire
+            //          ? __resolved.then(function () { return require(x); }) /*CommonJs Require*/
+            //          : new Promise(function (_a, _b) { require([x], _a, _b); }); /*Amd Require*/
+            // });
+            needUMDDynamicImportHelper = true;
+            return ts.createConditional(
+            /*condition*/ ts.createIdentifier("__syncRequire"), 
+            /*whenTrue*/ transformImportCallExpressionCommonJS(node), 
+            /*whenFalse*/ transformImportCallExpressionAMD(node));
+        }
+        function transformImportCallExpressionAMD(node) {
+            // improt("./blah")
+            // emit as
+            // define(["require", "exports", "blah"], function (require, exports) {
+            //     ...
+            //     new Promise(function (_a, _b) { require([x], _a, _b); }); /*Amd Require*/
+            // });
+            var resolve = ts.createUniqueName("resolve");
+            var reject = ts.createUniqueName("reject");
+            return ts.createNew(ts.createIdentifier("Promise"), 
+            /*typeArguments*/ undefined, [ts.createFunctionExpression(
+                /*modifiers*/ undefined, 
+                /*asteriskToken*/ undefined, 
+                /*name*/ undefined, 
+                /*typeParameters*/ undefined, [ts.createParameter(/*decorator*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, /*name*/ resolve),
+                    ts.createParameter(/*decorator*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, /*name*/ reject)], 
+                /*type*/ undefined, ts.createBlock([ts.createStatement(ts.createCall(ts.createIdentifier("require"), 
+                    /*typeArguments*/ undefined, [ts.createArrayLiteral([ts.firstOrUndefined(node.arguments) || ts.createOmittedExpression()]), resolve, reject]))]))]);
+        }
+        function transformImportCallExpressionCommonJS(node) {
+            // import("./blah")
+            // emit as
+            // Promise.resolve().then(function () { return require(x); }) /*CommonJs Require*/
+            // We have to wrap require in then callback so that require is done in asynchronously
+            // if we simply do require in resolve callback in Promise constructor. We will execute the loading immediately
+            return ts.createCall(ts.createPropertyAccess(ts.createCall(ts.createPropertyAccess(ts.createIdentifier("Promise"), "resolve"), /*typeArguments*/ undefined, /*argumentsArray*/ []), "then"), 
+            /*typeArguments*/ undefined, [ts.createFunctionExpression(
+                /*modifiers*/ undefined, 
+                /*asteriskToken*/ undefined, 
+                /*name*/ undefined, 
+                /*typeParameters*/ undefined, 
+                /*parameters*/ undefined, 
+                /*type*/ undefined, ts.createBlock([ts.createReturn(ts.createCall(ts.createIdentifier("require"), /*typeArguments*/ undefined, node.arguments))]))]);
+        }
         /**
          * Visits an ImportDeclaration node.
          *
-         * @param node The ImportDeclaration node.
+         * @param node The node to visit.
          */
         function visitImportDeclaration(node) {
-            if (!ts.contains(externalImports, node)) {
-                return undefined;
-            }
-            var statements = [];
+            var statements;
             var namespaceDeclaration = ts.getNamespaceDeclarationNode(node);
             if (moduleKind !== ts.ModuleKind.AMD) {
                 if (!node.importClause) {
                     // import "mod";
-                    statements.push(ts.createStatement(createRequireCall(node), 
-                    /*location*/ node));
+                    return ts.setTextRange(ts.createStatement(createRequireCall(node)), node);
                 }
                 else {
                     var variables = [];
@@ -53891,58 +64872,88 @@ var ts;
                             /*type*/ undefined, ts.getGeneratedNameForNode(node)));
                         }
                     }
-                    statements.push(ts.createVariableStatement(
-                    /*modifiers*/ undefined, ts.createConstDeclarationList(variables), 
+                    statements = ts.append(statements, ts.setTextRange(ts.createVariableStatement(
+                    /*modifiers*/ undefined, ts.createVariableDeclarationList(variables, languageVersion >= 2 /* ES2015 */ ? 2 /* Const */ : 0 /* None */)), 
                     /*location*/ node));
                 }
             }
             else if (namespaceDeclaration && ts.isDefaultImport(node)) {
                 // import d, * as n from "mod";
-                statements.push(ts.createVariableStatement(
+                statements = ts.append(statements, ts.createVariableStatement(
                 /*modifiers*/ undefined, ts.createVariableDeclarationList([
-                    ts.createVariableDeclaration(ts.getSynthesizedClone(namespaceDeclaration.name), 
-                    /*type*/ undefined, ts.getGeneratedNameForNode(node), 
+                    ts.setTextRange(ts.createVariableDeclaration(ts.getSynthesizedClone(namespaceDeclaration.name), 
+                    /*type*/ undefined, ts.getGeneratedNameForNode(node)), 
                     /*location*/ node)
-                ])));
+                ], languageVersion >= 2 /* ES2015 */ ? 2 /* Const */ : 0 /* None */)));
+            }
+            if (hasAssociatedEndOfDeclarationMarker(node)) {
+                // Defer exports until we encounter an EndOfDeclarationMarker node
+                var id = ts.getOriginalNodeId(node);
+                deferredExports[id] = appendExportsOfImportDeclaration(deferredExports[id], node);
+            }
+            else {
+                statements = appendExportsOfImportDeclaration(statements, node);
             }
-            addExportImportAssignments(statements, node);
             return ts.singleOrMany(statements);
         }
-        function visitImportEqualsDeclaration(node) {
-            if (!ts.contains(externalImports, node)) {
-                return undefined;
+        /**
+         * Creates a `require()` call to import an external module.
+         *
+         * @param importNode The declararation to import.
+         */
+        function createRequireCall(importNode) {
+            var moduleName = ts.getExternalModuleNameLiteral(importNode, currentSourceFile, host, resolver, compilerOptions);
+            var args = [];
+            if (moduleName) {
+                args.push(moduleName);
             }
-            // Set emitFlags on the name of the importEqualsDeclaration
-            // This is so the printer will not substitute the identifier
-            ts.setEmitFlags(node.name, 128 /* NoSubstitution */);
-            var statements = [];
+            return ts.createCall(ts.createIdentifier("require"), /*typeArguments*/ undefined, args);
+        }
+        /**
+         * Visits an ImportEqualsDeclaration node.
+         *
+         * @param node The node to visit.
+         */
+        function visitImportEqualsDeclaration(node) {
+            ts.Debug.assert(ts.isExternalModuleImportEqualsDeclaration(node), "import= for internal module references should be handled in an earlier transformer.");
+            var statements;
             if (moduleKind !== ts.ModuleKind.AMD) {
                 if (ts.hasModifier(node, 1 /* Export */)) {
-                    statements.push(ts.createStatement(createExportAssignment(node.name, createRequireCall(node)), 
-                    /*location*/ node));
+                    statements = ts.append(statements, ts.setTextRange(ts.createStatement(createExportExpression(node.name, createRequireCall(node))), node));
                 }
                 else {
-                    statements.push(ts.createVariableStatement(
+                    statements = ts.append(statements, ts.setTextRange(ts.createVariableStatement(
                     /*modifiers*/ undefined, ts.createVariableDeclarationList([
                         ts.createVariableDeclaration(ts.getSynthesizedClone(node.name), 
                         /*type*/ undefined, createRequireCall(node))
                     ], 
-                    /*location*/ undefined, 
-                    /*flags*/ languageVersion >= 2 /* ES6 */ ? 2 /* Const */ : 0 /* None */), 
-                    /*location*/ node));
+                    /*flags*/ languageVersion >= 2 /* ES2015 */ ? 2 /* Const */ : 0 /* None */)), node));
                 }
             }
             else {
                 if (ts.hasModifier(node, 1 /* Export */)) {
-                    statements.push(ts.createStatement(createExportAssignment(node.name, node.name), 
-                    /*location*/ node));
+                    statements = ts.append(statements, ts.setTextRange(ts.createStatement(createExportExpression(ts.getExportName(node), ts.getLocalName(node))), node));
                 }
             }
-            addExportImportAssignments(statements, node);
-            return statements;
+            if (hasAssociatedEndOfDeclarationMarker(node)) {
+                // Defer exports until we encounter an EndOfDeclarationMarker node
+                var id = ts.getOriginalNodeId(node);
+                deferredExports[id] = appendExportsOfImportEqualsDeclaration(deferredExports[id], node);
+            }
+            else {
+                statements = appendExportsOfImportEqualsDeclaration(statements, node);
+            }
+            return ts.singleOrMany(statements);
         }
+        /**
+         * Visits an ExportDeclaration node.
+         *
+         * @param The node to visit.
+         */
         function visitExportDeclaration(node) {
-            if (!ts.contains(externalImports, node)) {
+            if (!node.moduleSpecifier) {
+                // Elide export declarations with no module specifier as they are handled
+                // elsewhere.
                 return undefined;
             }
             var generatedName = ts.getGeneratedNameForNode(node);
@@ -53950,278 +64961,459 @@ var ts;
                 var statements = [];
                 // export { x, y } from "mod";
                 if (moduleKind !== ts.ModuleKind.AMD) {
-                    statements.push(ts.createVariableStatement(
+                    statements.push(ts.setTextRange(ts.createVariableStatement(
                     /*modifiers*/ undefined, ts.createVariableDeclarationList([
                         ts.createVariableDeclaration(generatedName, 
                         /*type*/ undefined, createRequireCall(node))
-                    ]), 
+                    ])), 
                     /*location*/ node));
                 }
                 for (var _i = 0, _a = node.exportClause.elements; _i < _a.length; _i++) {
                     var specifier = _a[_i];
-                    if (resolver.isValueAliasDeclaration(specifier)) {
-                        var exportedValue = ts.createPropertyAccess(generatedName, specifier.propertyName || specifier.name);
-                        statements.push(ts.createStatement(createExportAssignment(specifier.name, exportedValue), 
-                        /*location*/ specifier));
-                    }
+                    var exportedValue = ts.createPropertyAccess(generatedName, specifier.propertyName || specifier.name);
+                    statements.push(ts.setTextRange(ts.createStatement(createExportExpression(ts.getExportName(specifier), exportedValue)), specifier));
                 }
                 return ts.singleOrMany(statements);
             }
-            else if (resolver.moduleExportsSomeValue(node.moduleSpecifier)) {
+            else {
                 // export * from "mod";
-                return ts.createStatement(ts.createCall(ts.createIdentifier("__export"), 
-                /*typeArguments*/ undefined, [
-                    moduleKind !== ts.ModuleKind.AMD
-                        ? createRequireCall(node)
-                        : generatedName
-                ]), 
-                /*location*/ node);
+                return ts.setTextRange(ts.createStatement(createExportStarHelper(context, moduleKind !== ts.ModuleKind.AMD ? createRequireCall(node) : generatedName)), node);
             }
         }
+        /**
+         * Visits an ExportAssignment node.
+         *
+         * @param node The node to visit.
+         */
         function visitExportAssignment(node) {
-            if (!node.isExportEquals) {
-                if (ts.nodeIsSynthesized(node) || resolver.isValueAliasDeclaration(node)) {
-                    var statements = [];
-                    addExportDefault(statements, node.expression, /*location*/ node);
-                    return statements;
-                }
+            if (node.isExportEquals) {
+                return undefined;
             }
-            return undefined;
+            var statements;
+            var original = node.original;
+            if (original && hasAssociatedEndOfDeclarationMarker(original)) {
+                // Defer exports until we encounter an EndOfDeclarationMarker node
+                var id = ts.getOriginalNodeId(node);
+                deferredExports[id] = appendExportStatement(deferredExports[id], ts.createIdentifier("default"), node.expression, /*location*/ node, /*allowComments*/ true);
+            }
+            else {
+                statements = appendExportStatement(statements, ts.createIdentifier("default"), node.expression, /*location*/ node, /*allowComments*/ true);
+            }
+            return ts.singleOrMany(statements);
         }
-        function addExportDefault(statements, expression, location) {
-            tryAddExportDefaultCompat(statements);
-            statements.push(ts.createStatement(createExportAssignment(ts.createIdentifier("default"), expression), location));
+        /**
+         * Visits a FunctionDeclaration node.
+         *
+         * @param node The node to visit.
+         */
+        function visitFunctionDeclaration(node) {
+            var statements;
+            if (ts.hasModifier(node, 1 /* Export */)) {
+                statements = ts.append(statements, ts.setOriginalNode(ts.setTextRange(ts.createFunctionDeclaration(
+                /*decorators*/ undefined, ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), node.asteriskToken, ts.getDeclarationName(node, /*allowComments*/ true, /*allowSourceMaps*/ true), 
+                /*typeParameters*/ undefined, ts.visitNodes(node.parameters, importCallExpressionVisitor), 
+                /*type*/ undefined, ts.visitEachChild(node.body, importCallExpressionVisitor, context)), 
+                /*location*/ node), 
+                /*original*/ node));
+            }
+            else {
+                statements = ts.append(statements, ts.visitEachChild(node, importCallExpressionVisitor, context));
+            }
+            if (hasAssociatedEndOfDeclarationMarker(node)) {
+                // Defer exports until we encounter an EndOfDeclarationMarker node
+                var id = ts.getOriginalNodeId(node);
+                deferredExports[id] = appendExportsOfHoistedDeclaration(deferredExports[id], node);
+            }
+            else {
+                statements = appendExportsOfHoistedDeclaration(statements, node);
+            }
+            return ts.singleOrMany(statements);
+        }
+        /**
+         * Visits a ClassDeclaration node.
+         *
+         * @param node The node to visit.
+         */
+        function visitClassDeclaration(node) {
+            var statements;
+            if (ts.hasModifier(node, 1 /* Export */)) {
+                statements = ts.append(statements, ts.setOriginalNode(ts.setTextRange(ts.createClassDeclaration(
+                /*decorators*/ undefined, ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), ts.getDeclarationName(node, /*allowComments*/ true, /*allowSourceMaps*/ true), 
+                /*typeParameters*/ undefined, ts.visitNodes(node.heritageClauses, importCallExpressionVisitor), node.members), node), node));
+            }
+            else {
+                statements = ts.append(statements, ts.visitEachChild(node, importCallExpressionVisitor, context));
+            }
+            if (hasAssociatedEndOfDeclarationMarker(node)) {
+                // Defer exports until we encounter an EndOfDeclarationMarker node
+                var id = ts.getOriginalNodeId(node);
+                deferredExports[id] = appendExportsOfHoistedDeclaration(deferredExports[id], node);
+            }
+            else {
+                statements = appendExportsOfHoistedDeclaration(statements, node);
+            }
+            return ts.singleOrMany(statements);
         }
-        function tryAddExportDefaultCompat(statements) {
-            var original = ts.getOriginalNode(currentSourceFile);
-            ts.Debug.assert(original.kind === 256 /* SourceFile */);
-            if (!original.symbol.exports["___esModule"]) {
-                if (languageVersion === 0 /* ES3 */) {
-                    statements.push(ts.createStatement(createExportAssignment(ts.createIdentifier("__esModule"), ts.createLiteral(true))));
+        /**
+         * Visits a VariableStatement node.
+         *
+         * @param node The node to visit.
+         */
+        function visitVariableStatement(node) {
+            var statements;
+            var variables;
+            var expressions;
+            if (ts.hasModifier(node, 1 /* Export */)) {
+                var modifiers = void 0;
+                // If we're exporting these variables, then these just become assignments to 'exports.x'.
+                // We only want to emit assignments for variables with initializers.
+                for (var _i = 0, _a = node.declarationList.declarations; _i < _a.length; _i++) {
+                    var variable = _a[_i];
+                    if (ts.isIdentifier(variable.name) && ts.isLocalName(variable.name)) {
+                        if (!modifiers) {
+                            modifiers = ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier);
+                        }
+                        variables = ts.append(variables, variable);
+                    }
+                    else if (variable.initializer) {
+                        expressions = ts.append(expressions, transformInitializedVariable(variable));
+                    }
                 }
-                else {
-                    statements.push(ts.createStatement(ts.createCall(ts.createPropertyAccess(ts.createIdentifier("Object"), "defineProperty"), 
-                    /*typeArguments*/ undefined, [
-                        ts.createIdentifier("exports"),
-                        ts.createLiteral("__esModule"),
-                        ts.createObjectLiteral([
-                            ts.createPropertyAssignment("value", ts.createLiteral(true))
-                        ])
-                    ])));
+                if (variables) {
+                    statements = ts.append(statements, ts.updateVariableStatement(node, modifiers, ts.updateVariableDeclarationList(node.declarationList, variables)));
+                }
+                if (expressions) {
+                    statements = ts.append(statements, ts.setTextRange(ts.createStatement(ts.inlineExpressions(expressions)), node));
                 }
             }
+            else {
+                statements = ts.append(statements, ts.visitEachChild(node, importCallExpressionVisitor, context));
+            }
+            if (hasAssociatedEndOfDeclarationMarker(node)) {
+                // Defer exports until we encounter an EndOfDeclarationMarker node
+                var id = ts.getOriginalNodeId(node);
+                deferredExports[id] = appendExportsOfVariableStatement(deferredExports[id], node);
+            }
+            else {
+                statements = appendExportsOfVariableStatement(statements, node);
+            }
+            return ts.singleOrMany(statements);
         }
-        function addExportImportAssignments(statements, node) {
-            if (ts.isImportEqualsDeclaration(node)) {
-                addExportMemberAssignments(statements, node.name);
+        /**
+         * Transforms an exported variable with an initializer into an expression.
+         *
+         * @param node The node to transform.
+         */
+        function transformInitializedVariable(node) {
+            if (ts.isBindingPattern(node.name)) {
+                return ts.flattenDestructuringAssignment(ts.visitNode(node, importCallExpressionVisitor), 
+                /*visitor*/ undefined, context, 0 /* All */, 
+                /*needsValue*/ false, createExportExpression);
             }
             else {
-                var names = ts.reduceEachChild(node, collectExportMembers, []);
-                for (var _i = 0, names_1 = names; _i < names_1.length; _i++) {
-                    var name_39 = names_1[_i];
-                    addExportMemberAssignments(statements, name_39);
-                }
+                return ts.createAssignment(ts.setTextRange(ts.createPropertyAccess(ts.createIdentifier("exports"), node.name), 
+                /*location*/ node.name), ts.visitNode(node.initializer, importCallExpressionVisitor));
             }
         }
-        function collectExportMembers(names, node) {
-            if (ts.isAliasSymbolDeclaration(node) && resolver.isValueAliasDeclaration(node) && ts.isDeclaration(node)) {
-                var name_40 = node.name;
-                if (ts.isIdentifier(name_40)) {
-                    names.push(name_40);
-                }
+        /**
+         * Visits a MergeDeclarationMarker used as a placeholder for the beginning of a merged
+         * and transformed declaration.
+         *
+         * @param node The node to visit.
+         */
+        function visitMergeDeclarationMarker(node) {
+            // For an EnumDeclaration or ModuleDeclaration that merges with a preceeding
+            // declaration we do not emit a leading variable declaration. To preserve the
+            // begin/end semantics of the declararation and to properly handle exports
+            // we wrapped the leading variable declaration in a `MergeDeclarationMarker`.
+            //
+            // To balance the declaration, add the exports of the elided variable
+            // statement.
+            if (hasAssociatedEndOfDeclarationMarker(node) && node.original.kind === 208 /* VariableStatement */) {
+                var id = ts.getOriginalNodeId(node);
+                deferredExports[id] = appendExportsOfVariableStatement(deferredExports[id], node.original);
             }
-            return ts.reduceEachChild(node, collectExportMembers, names);
+            return node;
         }
-        function addExportMemberAssignments(statements, name) {
-            if (!exportEquals && exportSpecifiers && ts.hasProperty(exportSpecifiers, name.text)) {
-                for (var _i = 0, _a = exportSpecifiers[name.text]; _i < _a.length; _i++) {
-                    var specifier = _a[_i];
-                    statements.push(ts.startOnNewLine(ts.createStatement(createExportAssignment(specifier.name, name), 
-                    /*location*/ specifier.name)));
-                }
+        /**
+         * Determines whether a node has an associated EndOfDeclarationMarker.
+         *
+         * @param node The node to test.
+         */
+        function hasAssociatedEndOfDeclarationMarker(node) {
+            return (ts.getEmitFlags(node) & 4194304 /* HasEndOfDeclarationMarker */) !== 0;
+        }
+        /**
+         * Visits a DeclarationMarker used as a placeholder for the end of a transformed
+         * declaration.
+         *
+         * @param node The node to visit.
+         */
+        function visitEndOfDeclarationMarker(node) {
+            // For some transformations we emit an `EndOfDeclarationMarker` to mark the actual
+            // end of the transformed declaration. We use this marker to emit any deferred exports
+            // of the declaration.
+            var id = ts.getOriginalNodeId(node);
+            var statements = deferredExports[id];
+            if (statements) {
+                delete deferredExports[id];
+                return ts.append(statements, node);
             }
+            return node;
         }
-        function addExportMemberAssignment(statements, node) {
-            if (ts.hasModifier(node, 512 /* Default */)) {
-                addExportDefault(statements, getDeclarationName(node), /*location*/ node);
+        /**
+         * Appends the exports of an ImportDeclaration to a statement list, returning the
+         * statement list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param decl The declaration whose exports are to be recorded.
+         */
+        function appendExportsOfImportDeclaration(statements, decl) {
+            if (currentModuleInfo.exportEquals) {
+                return statements;
             }
-            else {
-                statements.push(createExportStatement(node.name, ts.setEmitFlags(ts.getSynthesizedClone(node.name), 262144 /* LocalName */), /*location*/ node));
+            var importClause = decl.importClause;
+            if (!importClause) {
+                return statements;
             }
-        }
-        function visitVariableStatement(node) {
-            // If the variable is for a generated declaration,
-            // we should maintain it and just strip off the 'export' modifier if necessary.
-            var originalKind = ts.getOriginalNode(node).kind;
-            if (originalKind === 225 /* ModuleDeclaration */ ||
-                originalKind === 224 /* EnumDeclaration */ ||
-                originalKind === 221 /* ClassDeclaration */) {
-                if (!ts.hasModifier(node, 1 /* Export */)) {
-                    return node;
-                }
-                return ts.setOriginalNode(ts.createVariableStatement(
-                /*modifiers*/ undefined, node.declarationList), node);
+            if (importClause.name) {
+                statements = appendExportsOfDeclaration(statements, importClause);
             }
-            var resultStatements = [];
-            // If we're exporting these variables, then these just become assignments to 'exports.blah'.
-            // We only want to emit assignments for variables with initializers.
-            if (ts.hasModifier(node, 1 /* Export */)) {
-                var variables = ts.getInitializedVariables(node.declarationList);
-                if (variables.length > 0) {
-                    var inlineAssignments = ts.createStatement(ts.inlineExpressions(ts.map(variables, transformInitializedVariable)), node);
-                    resultStatements.push(inlineAssignments);
+            var namedBindings = importClause.namedBindings;
+            if (namedBindings) {
+                switch (namedBindings.kind) {
+                    case 240 /* NamespaceImport */:
+                        statements = appendExportsOfDeclaration(statements, namedBindings);
+                        break;
+                    case 241 /* NamedImports */:
+                        for (var _i = 0, _a = namedBindings.elements; _i < _a.length; _i++) {
+                            var importBinding = _a[_i];
+                            statements = appendExportsOfDeclaration(statements, importBinding);
+                        }
+                        break;
                 }
             }
-            else {
-                resultStatements.push(node);
+            return statements;
+        }
+        /**
+         * Appends the exports of an ImportEqualsDeclaration to a statement list, returning the
+         * statement list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param decl The declaration whose exports are to be recorded.
+         */
+        function appendExportsOfImportEqualsDeclaration(statements, decl) {
+            if (currentModuleInfo.exportEquals) {
+                return statements;
+            }
+            return appendExportsOfDeclaration(statements, decl);
+        }
+        /**
+         * Appends the exports of a VariableStatement to a statement list, returning the statement
+         * list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param node The VariableStatement whose exports are to be recorded.
+         */
+        function appendExportsOfVariableStatement(statements, node) {
+            if (currentModuleInfo.exportEquals) {
+                return statements;
             }
-            // While we might not have been exported here, each variable might have been exported
-            // later on in an export specifier (e.g. `export {foo as blah, bar}`).
             for (var _i = 0, _a = node.declarationList.declarations; _i < _a.length; _i++) {
                 var decl = _a[_i];
-                addExportMemberAssignmentsForBindingName(resultStatements, decl.name);
+                statements = appendExportsOfBindingElement(statements, decl);
             }
-            return resultStatements;
+            return statements;
         }
         /**
-         * Creates appropriate assignments for each binding identifier that is exported in an export specifier,
-         * and inserts it into 'resultStatements'.
+         * Appends the exports of a VariableDeclaration or BindingElement to a statement list,
+         * returning the statement list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param decl The declaration whose exports are to be recorded.
          */
-        function addExportMemberAssignmentsForBindingName(resultStatements, name) {
-            if (ts.isBindingPattern(name)) {
-                for (var _i = 0, _a = name.elements; _i < _a.length; _i++) {
+        function appendExportsOfBindingElement(statements, decl) {
+            if (currentModuleInfo.exportEquals) {
+                return statements;
+            }
+            if (ts.isBindingPattern(decl.name)) {
+                for (var _i = 0, _a = decl.name.elements; _i < _a.length; _i++) {
                     var element = _a[_i];
                     if (!ts.isOmittedExpression(element)) {
-                        addExportMemberAssignmentsForBindingName(resultStatements, element.name);
+                        statements = appendExportsOfBindingElement(statements, element);
                     }
                 }
             }
-            else {
-                if (!exportEquals && exportSpecifiers && ts.hasProperty(exportSpecifiers, name.text)) {
-                    var sourceFileId = ts.getOriginalNodeId(currentSourceFile);
-                    if (!bindingNameExportSpecifiersForFileMap[sourceFileId]) {
-                        bindingNameExportSpecifiersForFileMap[sourceFileId] = ts.createMap();
-                    }
-                    bindingNameExportSpecifiersForFileMap[sourceFileId][name.text] = exportSpecifiers[name.text];
-                    addExportMemberAssignments(resultStatements, name);
-                }
-            }
-        }
-        function transformInitializedVariable(node) {
-            var name = node.name;
-            if (ts.isBindingPattern(name)) {
-                return ts.flattenVariableDestructuringToExpression(context, node, hoistVariableDeclaration, getModuleMemberName, visitor);
-            }
-            else {
-                return ts.createAssignment(getModuleMemberName(name), ts.visitNode(node.initializer, visitor, ts.isExpression));
+            else if (!ts.isGeneratedIdentifier(decl.name)) {
+                statements = appendExportsOfDeclaration(statements, decl);
             }
+            return statements;
         }
-        function visitFunctionDeclaration(node) {
-            var statements = [];
-            var name = node.name || ts.getGeneratedNameForNode(node);
-            if (ts.hasModifier(node, 1 /* Export */)) {
-                statements.push(ts.setOriginalNode(ts.createFunctionDeclaration(
-                /*decorators*/ undefined, 
-                /*modifiers*/ undefined, node.asteriskToken, name, 
-                /*typeParameters*/ undefined, node.parameters, 
-                /*type*/ undefined, node.body, 
-                /*location*/ node), 
-                /*original*/ node));
-                addExportMemberAssignment(statements, node);
+        /**
+         * Appends the exports of a ClassDeclaration or FunctionDeclaration to a statement list,
+         * returning the statement list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param decl The declaration whose exports are to be recorded.
+         */
+        function appendExportsOfHoistedDeclaration(statements, decl) {
+            if (currentModuleInfo.exportEquals) {
+                return statements;
             }
-            else {
-                statements.push(node);
+            if (ts.hasModifier(decl, 1 /* Export */)) {
+                var exportName = ts.hasModifier(decl, 512 /* Default */) ? ts.createIdentifier("default") : decl.name;
+                statements = appendExportStatement(statements, exportName, ts.getLocalName(decl), /*location*/ decl);
             }
-            if (node.name) {
-                addExportMemberAssignments(statements, node.name);
+            if (decl.name) {
+                statements = appendExportsOfDeclaration(statements, decl);
             }
-            return ts.singleOrMany(statements);
+            return statements;
         }
-        function visitClassDeclaration(node) {
-            var statements = [];
-            var name = node.name || ts.getGeneratedNameForNode(node);
-            if (ts.hasModifier(node, 1 /* Export */)) {
-                statements.push(ts.setOriginalNode(ts.createClassDeclaration(
-                /*decorators*/ undefined, 
-                /*modifiers*/ undefined, name, 
-                /*typeParameters*/ undefined, node.heritageClauses, node.members, 
-                /*location*/ node), 
-                /*original*/ node));
-                addExportMemberAssignment(statements, node);
-            }
-            else {
-                statements.push(node);
-            }
-            // Decorators end up creating a series of assignment expressions which overwrite
-            // the local binding that we export, so we need to defer from exporting decorated classes
-            // until the decoration assignments take place. We do this when visiting expression-statements.
-            if (node.name && !(node.decorators && node.decorators.length)) {
-                addExportMemberAssignments(statements, node.name);
+        /**
+         * Appends the exports of a declaration to a statement list, returning the statement list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param decl The declaration to export.
+         */
+        function appendExportsOfDeclaration(statements, decl) {
+            var name = ts.getDeclarationName(decl);
+            var exportSpecifiers = currentModuleInfo.exportSpecifiers.get(name.text);
+            if (exportSpecifiers) {
+                for (var _i = 0, exportSpecifiers_1 = exportSpecifiers; _i < exportSpecifiers_1.length; _i++) {
+                    var exportSpecifier = exportSpecifiers_1[_i];
+                    statements = appendExportStatement(statements, exportSpecifier.name, name, /*location*/ exportSpecifier.name);
+                }
             }
-            return ts.singleOrMany(statements);
+            return statements;
+        }
+        /**
+         * Appends the down-level representation of an export to a statement list, returning the
+         * statement list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param exportName The name of the export.
+         * @param expression The expression to export.
+         * @param location The location to use for source maps and comments for the export.
+         * @param allowComments Whether to allow comments on the export.
+         */
+        function appendExportStatement(statements, exportName, expression, location, allowComments) {
+            statements = ts.append(statements, createExportStatement(exportName, expression, location, allowComments));
+            return statements;
         }
-        function visitExpressionStatement(node) {
-            var original = ts.getOriginalNode(node);
-            var origKind = original.kind;
-            if (origKind === 224 /* EnumDeclaration */ || origKind === 225 /* ModuleDeclaration */) {
-                return visitExpressionStatementForEnumOrNamespaceDeclaration(node, original);
+        function createUnderscoreUnderscoreESModule() {
+            var statement;
+            if (languageVersion === 0 /* ES3 */) {
+                statement = ts.createStatement(createExportExpression(ts.createIdentifier("__esModule"), ts.createLiteral(/*value*/ true)));
             }
-            else if (origKind === 221 /* ClassDeclaration */) {
-                // The decorated assignment for a class name may need to be transformed.
-                var classDecl = original;
-                if (classDecl.name) {
-                    var statements = [node];
-                    addExportMemberAssignments(statements, classDecl.name);
-                    return statements;
-                }
-            }
-            return node;
+            else {
+                statement = ts.createStatement(ts.createCall(ts.createPropertyAccess(ts.createIdentifier("Object"), "defineProperty"), 
+                /*typeArguments*/ undefined, [
+                    ts.createIdentifier("exports"),
+                    ts.createLiteral("__esModule"),
+                    ts.createObjectLiteral([
+                        ts.createPropertyAssignment("value", ts.createLiteral(/*value*/ true))
+                    ])
+                ]));
+            }
+            ts.setEmitFlags(statement, 1048576 /* CustomPrologue */);
+            return statement;
         }
-        function visitExpressionStatementForEnumOrNamespaceDeclaration(node, original) {
-            var statements = [node];
-            // Preserve old behavior for enums in which a variable statement is emitted after the body itself.
-            if (ts.hasModifier(original, 1 /* Export */) &&
-                original.kind === 224 /* EnumDeclaration */ &&
-                ts.isFirstDeclarationOfKind(original, 224 /* EnumDeclaration */)) {
-                addVarForExportedEnumOrNamespaceDeclaration(statements, original);
+        /**
+         * Creates a call to the current file's export function to export a value.
+         *
+         * @param name The bound name of the export.
+         * @param value The exported value.
+         * @param location The location to use for source maps and comments for the export.
+         * @param allowComments An optional value indicating whether to emit comments for the statement.
+         */
+        function createExportStatement(name, value, location, allowComments) {
+            var statement = ts.setTextRange(ts.createStatement(createExportExpression(name, value)), location);
+            ts.startOnNewLine(statement);
+            if (!allowComments) {
+                ts.setEmitFlags(statement, 1536 /* NoComments */);
             }
-            addExportMemberAssignments(statements, original.name);
-            return statements;
+            return statement;
         }
         /**
-         * Adds a trailing VariableStatement for an enum or module declaration.
+         * Creates a call to the current file's export function to export a value.
+         *
+         * @param name The bound name of the export.
+         * @param value The exported value.
+         * @param location The location to use for source maps and comments for the export.
          */
-        function addVarForExportedEnumOrNamespaceDeclaration(statements, node) {
-            var transformedStatement = ts.createVariableStatement(
-            /*modifiers*/ undefined, [ts.createVariableDeclaration(getDeclarationName(node), 
-                /*type*/ undefined, ts.createPropertyAccess(ts.createIdentifier("exports"), getDeclarationName(node)))], 
-            /*location*/ node);
-            ts.setEmitFlags(transformedStatement, 49152 /* NoComments */);
-            statements.push(transformedStatement);
+        function createExportExpression(name, value, location) {
+            return ts.setTextRange(ts.createAssignment(ts.createPropertyAccess(ts.createIdentifier("exports"), ts.getSynthesizedClone(name)), value), location);
         }
-        function getDeclarationName(node) {
-            return node.name ? ts.getSynthesizedClone(node.name) : ts.getGeneratedNameForNode(node);
+        //
+        // Modifier Visitors
+        //
+        /**
+         * Visit nodes to elide module-specific modifiers.
+         *
+         * @param node The node to visit.
+         */
+        function modifierVisitor(node) {
+            // Elide module-specific modifiers.
+            switch (node.kind) {
+                case 84 /* ExportKeyword */:
+                case 79 /* DefaultKeyword */:
+                    return undefined;
+            }
+            return node;
         }
-        function onEmitNode(emitContext, node, emitCallback) {
-            if (node.kind === 256 /* SourceFile */) {
-                bindingNameExportSpecifiersMap = bindingNameExportSpecifiersForFileMap[ts.getOriginalNodeId(node)];
-                previousOnEmitNode(emitContext, node, emitCallback);
-                bindingNameExportSpecifiersMap = undefined;
+        //
+        // Emit Notification
+        //
+        /**
+         * Hook for node emit notifications.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to emit.
+         * @param emit A callback used to emit the node in the printer.
+         */
+        function onEmitNode(hint, node, emitCallback) {
+            if (node.kind === 265 /* SourceFile */) {
+                currentSourceFile = node;
+                currentModuleInfo = moduleInfoMap[ts.getOriginalNodeId(currentSourceFile)];
+                noSubstitution = [];
+                previousOnEmitNode(hint, node, emitCallback);
+                currentSourceFile = undefined;
+                currentModuleInfo = undefined;
+                noSubstitution = undefined;
             }
             else {
-                previousOnEmitNode(emitContext, node, emitCallback);
+                previousOnEmitNode(hint, node, emitCallback);
             }
         }
+        //
+        // Substitutions
+        //
         /**
          * Hooks node substitutions.
          *
+         * @param hint A hint as to the intended usage of the node.
          * @param node The node to substitute.
-         * @param isExpression A value indicating whether the node is to be used in an expression
-         *                     position.
          */
-        function onSubstituteNode(emitContext, node) {
-            node = previousOnSubstituteNode(emitContext, node);
-            if (emitContext === 1 /* Expression */) {
+        function onSubstituteNode(hint, node) {
+            node = previousOnSubstituteNode(hint, node);
+            if (node.id && noSubstitution[node.id]) {
+                return node;
+            }
+            if (hint === 1 /* Expression */) {
                 return substituteExpression(node);
             }
             else if (ts.isShorthandPropertyAssignment(node)) {
@@ -54229,6 +65421,12 @@ var ts;
             }
             return node;
         }
+        /**
+         * Substitution for a ShorthandPropertyAssignment whose declaration name is an imported
+         * or exported symbol.
+         *
+         * @param node The node to substitute.
+         */
         function substituteShorthandPropertyAssignment(node) {
             var name = node.name;
             var exportedOrImportedName = substituteExpressionIdentifier(name);
@@ -54237,249 +65435,215 @@ var ts;
                 // destructuring assignment
                 if (node.objectAssignmentInitializer) {
                     var initializer = ts.createAssignment(exportedOrImportedName, node.objectAssignmentInitializer);
-                    return ts.createPropertyAssignment(name, initializer, /*location*/ node);
+                    return ts.setTextRange(ts.createPropertyAssignment(name, initializer), node);
                 }
-                return ts.createPropertyAssignment(name, exportedOrImportedName, /*location*/ node);
+                return ts.setTextRange(ts.createPropertyAssignment(name, exportedOrImportedName), node);
             }
             return node;
         }
+        /**
+         * Substitution for an Expression that may contain an imported or exported symbol.
+         *
+         * @param node The node to substitute.
+         */
         function substituteExpression(node) {
             switch (node.kind) {
-                case 69 /* Identifier */:
+                case 71 /* Identifier */:
                     return substituteExpressionIdentifier(node);
-                case 187 /* BinaryExpression */:
+                case 194 /* BinaryExpression */:
                     return substituteBinaryExpression(node);
-                case 186 /* PostfixUnaryExpression */:
-                case 185 /* PrefixUnaryExpression */:
+                case 193 /* PostfixUnaryExpression */:
+                case 192 /* PrefixUnaryExpression */:
                     return substituteUnaryExpression(node);
             }
             return node;
         }
+        /**
+         * Substitution for an Identifier expression that may contain an imported or exported
+         * symbol.
+         *
+         * @param node The node to substitute.
+         */
         function substituteExpressionIdentifier(node) {
-            return trySubstituteExportedName(node)
-                || trySubstituteImportedName(node)
-                || node;
-        }
-        function substituteBinaryExpression(node) {
-            var left = node.left;
-            // If the left-hand-side of the binaryExpression is an identifier and its is export through export Specifier
-            if (ts.isIdentifier(left) && ts.isAssignmentOperator(node.operatorToken.kind)) {
-                if (bindingNameExportSpecifiersMap && ts.hasProperty(bindingNameExportSpecifiersMap, left.text)) {
-                    ts.setEmitFlags(node, 128 /* NoSubstitution */);
-                    var nestedExportAssignment = void 0;
-                    for (var _i = 0, _a = bindingNameExportSpecifiersMap[left.text]; _i < _a.length; _i++) {
-                        var specifier = _a[_i];
-                        nestedExportAssignment = nestedExportAssignment ?
-                            createExportAssignment(specifier.name, nestedExportAssignment) :
-                            createExportAssignment(specifier.name, node);
-                    }
-                    return nestedExportAssignment;
+            if (ts.getEmitFlags(node) & 4096 /* HelperName */) {
+                var externalHelpersModuleName = ts.getExternalHelpersModuleName(currentSourceFile);
+                if (externalHelpersModuleName) {
+                    return ts.createPropertyAccess(externalHelpersModuleName, node);
                 }
+                return node;
             }
-            return node;
-        }
-        function substituteUnaryExpression(node) {
-            // Because how the compiler only parse plusplus and minusminus to be either prefixUnaryExpression or postFixUnaryExpression depended on where they are
-            // We don't need to check that the operator has SyntaxKind.plusplus or SyntaxKind.minusminus
-            var operator = node.operator;
-            var operand = node.operand;
-            if (ts.isIdentifier(operand) && bindingNameExportSpecifiersForFileMap) {
-                if (bindingNameExportSpecifiersMap && ts.hasProperty(bindingNameExportSpecifiersMap, operand.text)) {
-                    ts.setEmitFlags(node, 128 /* NoSubstitution */);
-                    var transformedUnaryExpression = void 0;
-                    if (node.kind === 186 /* PostfixUnaryExpression */) {
-                        transformedUnaryExpression = ts.createBinary(operand, ts.createNode(operator === 41 /* PlusPlusToken */ ? 57 /* PlusEqualsToken */ : 58 /* MinusEqualsToken */), ts.createLiteral(1), 
+            if (!ts.isGeneratedIdentifier(node) && !ts.isLocalName(node)) {
+                var exportContainer = resolver.getReferencedExportContainer(node, ts.isExportName(node));
+                if (exportContainer && exportContainer.kind === 265 /* SourceFile */) {
+                    return ts.setTextRange(ts.createPropertyAccess(ts.createIdentifier("exports"), ts.getSynthesizedClone(node)), 
+                    /*location*/ node);
+                }
+                var importDeclaration = resolver.getReferencedImportDeclaration(node);
+                if (importDeclaration) {
+                    if (ts.isImportClause(importDeclaration)) {
+                        return ts.setTextRange(ts.createPropertyAccess(ts.getGeneratedNameForNode(importDeclaration.parent), ts.createIdentifier("default")), 
                         /*location*/ node);
-                        // We have to set no substitution flag here to prevent visit the binary expression and substitute it again as we will preform all necessary substitution in here
-                        ts.setEmitFlags(transformedUnaryExpression, 128 /* NoSubstitution */);
                     }
-                    var nestedExportAssignment = void 0;
-                    for (var _i = 0, _a = bindingNameExportSpecifiersMap[operand.text]; _i < _a.length; _i++) {
-                        var specifier = _a[_i];
-                        nestedExportAssignment = nestedExportAssignment ?
-                            createExportAssignment(specifier.name, nestedExportAssignment) :
-                            createExportAssignment(specifier.name, transformedUnaryExpression || node);
+                    else if (ts.isImportSpecifier(importDeclaration)) {
+                        var name_54 = importDeclaration.propertyName || importDeclaration.name;
+                        return ts.setTextRange(ts.createPropertyAccess(ts.getGeneratedNameForNode(importDeclaration.parent.parent.parent), ts.getSynthesizedClone(name_54)), 
+                        /*location*/ node);
                     }
-                    return nestedExportAssignment;
                 }
             }
             return node;
         }
-        function trySubstituteExportedName(node) {
-            var emitFlags = ts.getEmitFlags(node);
-            if ((emitFlags & 262144 /* LocalName */) === 0) {
-                var container = resolver.getReferencedExportContainer(node, (emitFlags & 131072 /* ExportName */) !== 0);
-                if (container) {
-                    if (container.kind === 256 /* SourceFile */) {
-                        return ts.createPropertyAccess(ts.createIdentifier("exports"), ts.getSynthesizedClone(node), 
-                        /*location*/ node);
-                    }
+        /**
+         * Substitution for a BinaryExpression that may contain an imported or exported symbol.
+         *
+         * @param node The node to substitute.
+         */
+        function substituteBinaryExpression(node) {
+            // When we see an assignment expression whose left-hand side is an exported symbol,
+            // we should ensure all exports of that symbol are updated with the correct value.
+            //
+            // - We do not substitute generated identifiers for any reason.
+            // - We do not substitute identifiers tagged with the LocalName flag.
+            // - We do not substitute identifiers that were originally the name of an enum or
+            //   namespace due to how they are transformed in TypeScript.
+            // - We only substitute identifiers that are exported at the top level.
+            if (ts.isAssignmentOperator(node.operatorToken.kind)
+                && ts.isIdentifier(node.left)
+                && !ts.isGeneratedIdentifier(node.left)
+                && !ts.isLocalName(node.left)
+                && !ts.isDeclarationNameOfEnumOrNamespace(node.left)) {
+                var exportedNames = getExports(node.left);
+                if (exportedNames) {
+                    // For each additional export of the declaration, apply an export assignment.
+                    var expression = node;
+                    for (var _i = 0, exportedNames_1 = exportedNames; _i < exportedNames_1.length; _i++) {
+                        var exportName = exportedNames_1[_i];
+                        // Mark the node to prevent triggering this rule again.
+                        noSubstitution[ts.getNodeId(expression)] = true;
+                        expression = createExportExpression(exportName, expression, /*location*/ node);
+                    }
+                    return expression;
                 }
             }
-            return undefined;
+            return node;
         }
-        function trySubstituteImportedName(node) {
-            if ((ts.getEmitFlags(node) & 262144 /* LocalName */) === 0) {
-                var declaration = resolver.getReferencedImportDeclaration(node);
-                if (declaration) {
-                    if (ts.isImportClause(declaration)) {
-                        if (languageVersion >= 1 /* ES5 */) {
-                            return ts.createPropertyAccess(ts.getGeneratedNameForNode(declaration.parent), ts.createIdentifier("default"), 
-                            /*location*/ node);
-                        }
-                        else {
-                            // TODO: ES3 transform to handle x.default -> x["default"]
-                            return ts.createElementAccess(ts.getGeneratedNameForNode(declaration.parent), ts.createLiteral("default"), 
-                            /*location*/ node);
-                        }
-                    }
-                    else if (ts.isImportSpecifier(declaration)) {
-                        var name_41 = declaration.propertyName || declaration.name;
-                        if (name_41.originalKeywordKind === 77 /* DefaultKeyword */ && languageVersion <= 0 /* ES3 */) {
-                            // TODO: ES3 transform to handle x.default -> x["default"]
-                            return ts.createElementAccess(ts.getGeneratedNameForNode(declaration.parent.parent.parent), ts.createLiteral(name_41.text), 
-                            /*location*/ node);
-                        }
-                        else {
-                            return ts.createPropertyAccess(ts.getGeneratedNameForNode(declaration.parent.parent.parent), ts.getSynthesizedClone(name_41), 
-                            /*location*/ node);
-                        }
-                    }
+        /**
+         * Substitution for a UnaryExpression that may contain an imported or exported symbol.
+         *
+         * @param node The node to substitute.
+         */
+        function substituteUnaryExpression(node) {
+            // When we see a prefix or postfix increment expression whose operand is an exported
+            // symbol, we should ensure all exports of that symbol are updated with the correct
+            // value.
+            //
+            // - We do not substitute generated identifiers for any reason.
+            // - We do not substitute identifiers tagged with the LocalName flag.
+            // - We do not substitute identifiers that were originally the name of an enum or
+            //   namespace due to how they are transformed in TypeScript.
+            // - We only substitute identifiers that are exported at the top level.
+            if ((node.operator === 43 /* PlusPlusToken */ || node.operator === 44 /* MinusMinusToken */)
+                && ts.isIdentifier(node.operand)
+                && !ts.isGeneratedIdentifier(node.operand)
+                && !ts.isLocalName(node.operand)
+                && !ts.isDeclarationNameOfEnumOrNamespace(node.operand)) {
+                var exportedNames = getExports(node.operand);
+                if (exportedNames) {
+                    var expression = node.kind === 193 /* PostfixUnaryExpression */
+                        ? ts.setTextRange(ts.createBinary(node.operand, ts.createToken(node.operator === 43 /* PlusPlusToken */ ? 59 /* PlusEqualsToken */ : 60 /* MinusEqualsToken */), ts.createLiteral(1)), 
+                        /*location*/ node)
+                        : node;
+                    for (var _i = 0, exportedNames_2 = exportedNames; _i < exportedNames_2.length; _i++) {
+                        var exportName = exportedNames_2[_i];
+                        // Mark the node to prevent triggering this rule again.
+                        noSubstitution[ts.getNodeId(expression)] = true;
+                        expression = createExportExpression(exportName, expression);
+                    }
+                    return expression;
                 }
             }
-            return undefined;
-        }
-        function getModuleMemberName(name) {
-            return ts.createPropertyAccess(ts.createIdentifier("exports"), name, 
-            /*location*/ name);
-        }
-        function createRequireCall(importNode) {
-            var moduleName = ts.getExternalModuleNameLiteral(importNode, currentSourceFile, host, resolver, compilerOptions);
-            var args = [];
-            if (ts.isDefined(moduleName)) {
-                args.push(moduleName);
-            }
-            return ts.createCall(ts.createIdentifier("require"), /*typeArguments*/ undefined, args);
-        }
-        function createExportStatement(name, value, location) {
-            var statement = ts.createStatement(createExportAssignment(name, value));
-            statement.startsOnNewLine = true;
-            if (location) {
-                ts.setSourceMapRange(statement, location);
-            }
-            return statement;
-        }
-        function createExportAssignment(name, value) {
-            return ts.createAssignment(name.originalKeywordKind === 77 /* DefaultKeyword */ && languageVersion === 0 /* ES3 */
-                ? ts.createElementAccess(ts.createIdentifier("exports"), ts.createLiteral(name.text))
-                : ts.createPropertyAccess(ts.createIdentifier("exports"), ts.getSynthesizedClone(name)), value);
+            return node;
         }
-        function collectAsynchronousDependencies(node, includeNonAmdDependencies) {
-            // names of modules with corresponding parameter in the factory function
-            var aliasedModuleNames = [];
-            // names of modules with no corresponding parameters in factory function
-            var unaliasedModuleNames = [];
-            // names of the parameters in the factory function; these
-            // parameters need to match the indexes of the corresponding
-            // module names in aliasedModuleNames.
-            var importAliasNames = [];
-            // Fill in amd-dependency tags
-            for (var _i = 0, _a = node.amdDependencies; _i < _a.length; _i++) {
-                var amdDependency = _a[_i];
-                if (amdDependency.name) {
-                    aliasedModuleNames.push(ts.createLiteral(amdDependency.path));
-                    importAliasNames.push(ts.createParameter(amdDependency.name));
-                }
-                else {
-                    unaliasedModuleNames.push(ts.createLiteral(amdDependency.path));
-                }
-            }
-            for (var _b = 0, externalImports_1 = externalImports; _b < externalImports_1.length; _b++) {
-                var importNode = externalImports_1[_b];
-                // Find the name of the external module
-                var externalModuleName = ts.getExternalModuleNameLiteral(importNode, currentSourceFile, host, resolver, compilerOptions);
-                // Find the name of the module alias, if there is one
-                var importAliasName = ts.getLocalNameForExternalImport(importNode, currentSourceFile);
-                if (includeNonAmdDependencies && importAliasName) {
-                    // Set emitFlags on the name of the classDeclaration
-                    // This is so that when printer will not substitute the identifier
-                    ts.setEmitFlags(importAliasName, 128 /* NoSubstitution */);
-                    aliasedModuleNames.push(externalModuleName);
-                    importAliasNames.push(ts.createParameter(importAliasName));
-                }
-                else {
-                    unaliasedModuleNames.push(externalModuleName);
+        /**
+         * Gets the additional exports of a name.
+         *
+         * @param name The name.
+         */
+        function getExports(name) {
+            if (!ts.isGeneratedIdentifier(name)) {
+                var valueDeclaration = resolver.getReferencedImportDeclaration(name)
+                    || resolver.getReferencedValueDeclaration(name);
+                if (valueDeclaration) {
+                    return currentModuleInfo
+                        && currentModuleInfo.exportedBindings[ts.getOriginalNodeId(valueDeclaration)];
                 }
             }
-            return { aliasedModuleNames: aliasedModuleNames, unaliasedModuleNames: unaliasedModuleNames, importAliasNames: importAliasNames };
-        }
-        function updateSourceFile(node, statements) {
-            var updated = ts.getMutableClone(node);
-            updated.statements = ts.createNodeArray(statements, node.statements);
-            return updated;
         }
-        var _a;
     }
     ts.transformModule = transformModule;
+    // emit output for the __export helper function
+    var exportStarHelper = {
+        name: "typescript:export-star",
+        scoped: true,
+        text: "\n            function __export(m) {\n                for (var p in m) if (!exports.hasOwnProperty(p)) exports[p] = m[p];\n            }\n        "
+    };
+    function createExportStarHelper(context, module) {
+        var compilerOptions = context.getCompilerOptions();
+        return compilerOptions.importHelpers
+            ? ts.createCall(ts.getHelperName("__exportStar"), /*typeArguments*/ undefined, [module, ts.createIdentifier("exports")])
+            : ts.createCall(ts.createIdentifier("__export"), /*typeArguments*/ undefined, [module]);
+    }
+    // emit helper for dynamic import
+    var dynamicImportUMDHelper = {
+        name: "typescript:dynamicimport-sync-require",
+        scoped: true,
+        text: "\n            var __syncRequire = typeof module === \"object\" && typeof module.exports === \"object\";"
+    };
 })(ts || (ts = {}));
 /// <reference path="../../factory.ts" />
 /// <reference path="../../visitor.ts" />
+/// <reference path="../destructuring.ts" />
 /*@internal*/
 var ts;
 (function (ts) {
     function transformSystemModule(context) {
-        var startLexicalEnvironment = context.startLexicalEnvironment, endLexicalEnvironment = context.endLexicalEnvironment, hoistVariableDeclaration = context.hoistVariableDeclaration, hoistFunctionDeclaration = context.hoistFunctionDeclaration;
+        var startLexicalEnvironment = context.startLexicalEnvironment, endLexicalEnvironment = context.endLexicalEnvironment, hoistVariableDeclaration = context.hoistVariableDeclaration;
         var compilerOptions = context.getCompilerOptions();
         var resolver = context.getEmitResolver();
         var host = context.getEmitHost();
-        var languageVersion = ts.getEmitScriptTarget(compilerOptions);
         var previousOnSubstituteNode = context.onSubstituteNode;
         var previousOnEmitNode = context.onEmitNode;
         context.onSubstituteNode = onSubstituteNode;
         context.onEmitNode = onEmitNode;
-        context.enableSubstitution(69 /* Identifier */);
-        context.enableSubstitution(187 /* BinaryExpression */);
-        context.enableSubstitution(185 /* PrefixUnaryExpression */);
-        context.enableSubstitution(186 /* PostfixUnaryExpression */);
-        context.enableEmitNotification(256 /* SourceFile */);
-        var exportFunctionForFileMap = [];
-        var currentSourceFile;
-        var externalImports;
-        var exportSpecifiers;
-        var exportEquals;
-        var hasExportStarsToExportValues;
-        var exportFunctionForFile;
-        var contextObjectForFile;
-        var exportedLocalNames;
-        var exportedFunctionDeclarations;
+        context.enableSubstitution(71 /* Identifier */); // Substitutes expression identifiers for imported symbols.
+        context.enableSubstitution(194 /* BinaryExpression */); // Substitutes assignments to exported symbols.
+        context.enableSubstitution(192 /* PrefixUnaryExpression */); // Substitutes updates to exported symbols.
+        context.enableSubstitution(193 /* PostfixUnaryExpression */); // Substitutes updates to exported symbols.
+        context.enableEmitNotification(265 /* SourceFile */); // Restore state when substituting nodes in a file.
+        var moduleInfoMap = []; // The ExternalModuleInfo for each file.
+        var deferredExports = []; // Exports to defer until an EndOfDeclarationMarker is found.
+        var exportFunctionsMap = []; // The export function associated with a source file.
+        var noSubstitutionMap = []; // Set of nodes for which substitution rules should be ignored for each file.
+        var currentSourceFile; // The current file.
+        var moduleInfo; // ExternalModuleInfo for the current file.
+        var exportFunction; // The export function for the current file.
+        var contextObject; // The context object for the current file.
+        var hoistedStatements;
         var enclosingBlockScopedContainer;
-        var currentParent;
-        var currentNode;
+        var noSubstitution; // Set of nodes for which substitution rules should be ignored.
         return transformSourceFile;
+        /**
+         * Transforms the module aspects of a SourceFile.
+         *
+         * @param node The SourceFile node.
+         */
         function transformSourceFile(node) {
-            if (ts.isDeclarationFile(node)) {
+            if (node.isDeclarationFile || !(ts.isEffectiveExternalModule(node, compilerOptions) || node.transformFlags & 67108864 /* ContainsDynamicImport */)) {
                 return node;
             }
-            if (ts.isExternalModule(node) || compilerOptions.isolatedModules) {
-                currentSourceFile = node;
-                currentNode = node;
-                // Perform the transformation.
-                var updated = transformSystemModuleWorker(node);
-                ts.aggregateTransformFlags(updated);
-                currentSourceFile = undefined;
-                externalImports = undefined;
-                exportSpecifiers = undefined;
-                exportEquals = undefined;
-                hasExportStarsToExportValues = false;
-                exportFunctionForFile = undefined;
-                contextObjectForFile = undefined;
-                exportedLocalNames = undefined;
-                exportedFunctionDeclarations = undefined;
-                return updated;
-            }
-            return node;
-        }
-        function transformSystemModuleWorker(node) {
+            var id = ts.getOriginalNodeId(node);
+            currentSourceFile = node;
+            enclosingBlockScopedContainer = node;
             // System modules have the following shape:
             //
             //     System.register(['dep-1', ... 'dep-n'], function(exports) {/* module body function */})
@@ -54492,47 +65656,87 @@ var ts;
             //
             // The only exception in this rule is postfix unary operators,
             // see comment to 'substitutePostfixUnaryExpression' for more details
-            ts.Debug.assert(!exportFunctionForFile);
             // Collect information about the external module and dependency groups.
-            (_a = ts.collectExternalModuleInfo(node, resolver), externalImports = _a.externalImports, exportSpecifiers = _a.exportSpecifiers, exportEquals = _a.exportEquals, hasExportStarsToExportValues = _a.hasExportStarsToExportValues, _a);
+            moduleInfo = moduleInfoMap[id] = ts.collectExternalModuleInfo(node, resolver, compilerOptions);
             // Make sure that the name of the 'exports' function does not conflict with
             // existing identifiers.
-            exportFunctionForFile = ts.createUniqueName("exports");
-            contextObjectForFile = ts.createUniqueName("context");
-            exportFunctionForFileMap[ts.getOriginalNodeId(node)] = exportFunctionForFile;
-            var dependencyGroups = collectDependencyGroups(externalImports);
-            var statements = [];
+            exportFunction = ts.createUniqueName("exports");
+            exportFunctionsMap[id] = exportFunction;
+            contextObject = ts.createUniqueName("context");
             // Add the body of the module.
-            addSystemModuleBody(statements, node, dependencyGroups);
-            var moduleName = ts.tryGetModuleNameFromFile(node, host, compilerOptions);
-            var dependencies = ts.createArrayLiteral(ts.map(dependencyGroups, getNameOfDependencyGroup));
-            var body = ts.createFunctionExpression(
+            var dependencyGroups = collectDependencyGroups(moduleInfo.externalImports);
+            var moduleBodyBlock = createSystemModuleBody(node, dependencyGroups);
+            var moduleBodyFunction = ts.createFunctionExpression(
+            /*modifiers*/ undefined, 
             /*asteriskToken*/ undefined, 
             /*name*/ undefined, 
             /*typeParameters*/ undefined, [
-                ts.createParameter(exportFunctionForFile),
-                ts.createParameter(contextObjectForFile)
+                ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, exportFunction),
+                ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, contextObject)
             ], 
-            /*type*/ undefined, ts.setEmitFlags(ts.createBlock(statements, /*location*/ undefined, /*multiLine*/ true), 1 /* EmitEmitHelpers */));
+            /*type*/ undefined, moduleBodyBlock);
             // Write the call to `System.register`
             // Clear the emit-helpers flag for later passes since we'll have already used it in the module body
             // So the helper will be emit at the correct position instead of at the top of the source-file
-            return updateSourceFile(node, [
+            var moduleName = ts.tryGetModuleNameFromFile(node, host, compilerOptions);
+            var dependencies = ts.createArrayLiteral(ts.map(dependencyGroups, function (dependencyGroup) { return dependencyGroup.name; }));
+            var updated = ts.setEmitFlags(ts.updateSourceFileNode(node, ts.setTextRange(ts.createNodeArray([
                 ts.createStatement(ts.createCall(ts.createPropertyAccess(ts.createIdentifier("System"), "register"), 
                 /*typeArguments*/ undefined, moduleName
-                    ? [moduleName, dependencies, body]
-                    : [dependencies, body]))
-            ], /*nodeEmitFlags*/ ~1 /* EmitEmitHelpers */ & ts.getEmitFlags(node));
-            var _a;
+                    ? [moduleName, dependencies, moduleBodyFunction]
+                    : [dependencies, moduleBodyFunction]))
+            ]), node.statements)), 1024 /* NoTrailingComments */);
+            if (!(compilerOptions.outFile || compilerOptions.out)) {
+                ts.moveEmitHelpers(updated, moduleBodyBlock, function (helper) { return !helper.scoped; });
+            }
+            if (noSubstitution) {
+                noSubstitutionMap[id] = noSubstitution;
+                noSubstitution = undefined;
+            }
+            currentSourceFile = undefined;
+            moduleInfo = undefined;
+            exportFunction = undefined;
+            contextObject = undefined;
+            hoistedStatements = undefined;
+            enclosingBlockScopedContainer = undefined;
+            return ts.aggregateTransformFlags(updated);
+        }
+        /**
+         * Collects the dependency groups for this files imports.
+         *
+         * @param externalImports The imports for the file.
+         */
+        function collectDependencyGroups(externalImports) {
+            var groupIndices = ts.createMap();
+            var dependencyGroups = [];
+            for (var i = 0; i < externalImports.length; i++) {
+                var externalImport = externalImports[i];
+                var externalModuleName = ts.getExternalModuleNameLiteral(externalImport, currentSourceFile, host, resolver, compilerOptions);
+                if (externalModuleName) {
+                    var text = externalModuleName.text;
+                    var groupIndex = groupIndices.get(text);
+                    if (groupIndex !== undefined) {
+                        // deduplicate/group entries in dependency list by the dependency name
+                        dependencyGroups[groupIndex].externalImports.push(externalImport);
+                    }
+                    else {
+                        groupIndices.set(text, dependencyGroups.length);
+                        dependencyGroups.push({
+                            name: externalModuleName,
+                            externalImports: [externalImport]
+                        });
+                    }
+                }
+            }
+            return dependencyGroups;
         }
         /**
          * Adds the statements for the module body function for the source file.
          *
-         * @param statements The output statements for the module body.
          * @param node The source file for the module.
-         * @param statementOffset The offset at which to begin visiting the statements of the SourceFile.
+         * @param dependencyGroups The grouped dependencies of the module.
          */
-        function addSystemModuleBody(statements, node, dependencyGroups) {
+        function createSystemModuleBody(node, dependencyGroups) {
             // Shape of the body in system modules:
             //
             //  function (exports) {
@@ -54560,10 +65764,9 @@ var ts;
             // Will be transformed to:
             //
             //  function(exports) {
-            //      var file_1; // local alias
-            //      var y;
             //      function foo() { return y + file_1.x(); }
             //      exports("foo", foo);
+            //      var file_1, y;
             //      return {
             //          setters: [
             //              function(v) { file_1 = v }
@@ -54574,49 +65777,56 @@ var ts;
             //          }
             //      };
             //  }
+            var statements = [];
             // We start a new lexical environment in this function body, but *not* in the
             // body of the execute function. This allows us to emit temporary declarations
             // only in the outer module body and not in the inner one.
             startLexicalEnvironment();
             // Add any prologue directives.
-            var statementOffset = ts.addPrologueDirectives(statements, node.statements, /*ensureUseStrict*/ !compilerOptions.noImplicitUseStrict, visitSourceElement);
+            var ensureUseStrict = compilerOptions.alwaysStrict || (!compilerOptions.noImplicitUseStrict && ts.isExternalModule(currentSourceFile));
+            var statementOffset = ts.addPrologue(statements, node.statements, ensureUseStrict, sourceElementVisitor);
             // var __moduleName = context_1 && context_1.id;
             statements.push(ts.createVariableStatement(
             /*modifiers*/ undefined, ts.createVariableDeclarationList([
                 ts.createVariableDeclaration("__moduleName", 
-                /*type*/ undefined, ts.createLogicalAnd(contextObjectForFile, ts.createPropertyAccess(contextObjectForFile, "id")))
+                /*type*/ undefined, ts.createLogicalAnd(contextObject, ts.createPropertyAccess(contextObject, "id")))
             ])));
+            // Visit the synthetic external helpers import declaration if present
+            ts.visitNode(moduleInfo.externalHelpersImportDeclaration, sourceElementVisitor, ts.isStatement);
             // Visit the statements of the source file, emitting any transformations into
             // the `executeStatements` array. We do this *before* we fill the `setters` array
             // as we both emit transformations as well as aggregate some data used when creating
             // setters. This allows us to reduce the number of times we need to loop through the
             // statements of the source file.
-            var executeStatements = ts.visitNodes(node.statements, visitSourceElement, ts.isStatement, statementOffset);
-            // We emit the lexical environment (hoisted variables and function declarations)
-            // early to align roughly with our previous emit output.
+            var executeStatements = ts.visitNodes(node.statements, sourceElementVisitor, ts.isStatement, statementOffset);
+            // Emit early exports for function declarations.
+            ts.addRange(statements, hoistedStatements);
+            // We emit hoisted variables early to align roughly with our previous emit output.
             // Two key differences in this approach are:
             // - Temporary variables will appear at the top rather than at the bottom of the file
-            // - Calls to the exporter for exported function declarations are grouped after
-            //   the declarations.
             ts.addRange(statements, endLexicalEnvironment());
-            // Emit early exports for function declarations.
-            ts.addRange(statements, exportedFunctionDeclarations);
             var exportStarFunction = addExportStarIfNeeded(statements);
-            statements.push(ts.createReturn(ts.setMultiLine(ts.createObjectLiteral([
-                ts.createPropertyAssignment("setters", generateSetters(exportStarFunction, dependencyGroups)),
+            var moduleObject = ts.createObjectLiteral([
+                ts.createPropertyAssignment("setters", createSettersArray(exportStarFunction, dependencyGroups)),
                 ts.createPropertyAssignment("execute", ts.createFunctionExpression(
+                /*modifiers*/ undefined, 
                 /*asteriskToken*/ undefined, 
                 /*name*/ undefined, 
                 /*typeParameters*/ undefined, 
                 /*parameters*/ [], 
-                /*type*/ undefined, ts.createBlock(executeStatements, 
-                /*location*/ undefined, 
-                /*multiLine*/ true)))
-            ]), 
-            /*multiLine*/ true)));
+                /*type*/ undefined, ts.createBlock(executeStatements, /*multiLine*/ true)))
+            ]);
+            moduleObject.multiLine = true;
+            statements.push(ts.createReturn(moduleObject));
+            return ts.createBlock(statements, /*multiLine*/ true);
         }
+        /**
+         * Adds an exportStar function to a statement list if it is needed for the file.
+         *
+         * @param statements A statement list.
+         */
         function addExportStarIfNeeded(statements) {
-            if (!hasExportStarsToExportValues) {
+            if (!moduleInfo.hasExportStarsToExportValues) {
                 return;
             }
             // when resolving exports local exported entries/indirect exported entries in the module
@@ -54624,33 +65834,38 @@ var ts;
             // to support this we store names of local/indirect exported entries in a set.
             // this set is used to filter names brought by star expors.
             // local names set should only be added if we have anything exported
-            if (!exportedLocalNames && ts.isEmpty(exportSpecifiers)) {
+            if (!moduleInfo.exportedNames && moduleInfo.exportSpecifiers.size === 0) {
                 // no exported declarations (export var ...) or export specifiers (export {x})
                 // check if we have any non star export declarations.
                 var hasExportDeclarationWithExportClause = false;
-                for (var _i = 0, externalImports_2 = externalImports; _i < externalImports_2.length; _i++) {
-                    var externalImport = externalImports_2[_i];
-                    if (externalImport.kind === 236 /* ExportDeclaration */ && externalImport.exportClause) {
+                for (var _i = 0, _a = moduleInfo.externalImports; _i < _a.length; _i++) {
+                    var externalImport = _a[_i];
+                    if (externalImport.kind === 244 /* ExportDeclaration */ && externalImport.exportClause) {
                         hasExportDeclarationWithExportClause = true;
                         break;
                     }
                 }
                 if (!hasExportDeclarationWithExportClause) {
                     // we still need to emit exportStar helper
-                    return addExportStarFunction(statements, /*localNames*/ undefined);
+                    var exportStarFunction_1 = createExportStarFunction(/*localNames*/ undefined);
+                    statements.push(exportStarFunction_1);
+                    return exportStarFunction_1.name;
                 }
             }
             var exportedNames = [];
-            if (exportedLocalNames) {
-                for (var _a = 0, exportedLocalNames_1 = exportedLocalNames; _a < exportedLocalNames_1.length; _a++) {
-                    var exportedLocalName = exportedLocalNames_1[_a];
+            if (moduleInfo.exportedNames) {
+                for (var _b = 0, _c = moduleInfo.exportedNames; _b < _c.length; _b++) {
+                    var exportedLocalName = _c[_b];
+                    if (exportedLocalName.text === "default") {
+                        continue;
+                    }
                     // write name of exported declaration, i.e 'export var x...'
-                    exportedNames.push(ts.createPropertyAssignment(ts.createLiteral(exportedLocalName.text), ts.createLiteral(true)));
+                    exportedNames.push(ts.createPropertyAssignment(ts.createLiteral(exportedLocalName), ts.createTrue()));
                 }
             }
-            for (var _b = 0, externalImports_3 = externalImports; _b < externalImports_3.length; _b++) {
-                var externalImport = externalImports_3[_b];
-                if (externalImport.kind !== 236 /* ExportDeclaration */) {
+            for (var _d = 0, _e = moduleInfo.externalImports; _d < _e.length; _d++) {
+                var externalImport = _e[_d];
+                if (externalImport.kind !== 244 /* ExportDeclaration */) {
                     continue;
                 }
                 var exportDecl = externalImport;
@@ -54658,25 +65873,66 @@ var ts;
                     // export * from ...
                     continue;
                 }
-                for (var _c = 0, _d = exportDecl.exportClause.elements; _c < _d.length; _c++) {
-                    var element = _d[_c];
+                for (var _f = 0, _g = exportDecl.exportClause.elements; _f < _g.length; _f++) {
+                    var element = _g[_f];
                     // write name of indirectly exported entry, i.e. 'export {x} from ...'
-                    exportedNames.push(ts.createPropertyAssignment(ts.createLiteral((element.name || element.propertyName).text), ts.createLiteral(true)));
+                    exportedNames.push(ts.createPropertyAssignment(ts.createLiteral((element.name || element.propertyName).text), ts.createTrue()));
                 }
             }
             var exportedNamesStorageRef = ts.createUniqueName("exportedNames");
             statements.push(ts.createVariableStatement(
             /*modifiers*/ undefined, ts.createVariableDeclarationList([
                 ts.createVariableDeclaration(exportedNamesStorageRef, 
-                /*type*/ undefined, ts.createObjectLiteral(exportedNames, /*location*/ undefined, /*multiline*/ true))
+                /*type*/ undefined, ts.createObjectLiteral(exportedNames, /*multiline*/ true))
             ])));
-            return addExportStarFunction(statements, exportedNamesStorageRef);
+            var exportStarFunction = createExportStarFunction(exportedNamesStorageRef);
+            statements.push(exportStarFunction);
+            return exportStarFunction.name;
+        }
+        /**
+         * Creates an exportStar function for the file, with an optional set of excluded local
+         * names.
+         *
+         * @param localNames An optional reference to an object containing a set of excluded local
+         * names.
+         */
+        function createExportStarFunction(localNames) {
+            var exportStarFunction = ts.createUniqueName("exportStar");
+            var m = ts.createIdentifier("m");
+            var n = ts.createIdentifier("n");
+            var exports = ts.createIdentifier("exports");
+            var condition = ts.createStrictInequality(n, ts.createLiteral("default"));
+            if (localNames) {
+                condition = ts.createLogicalAnd(condition, ts.createLogicalNot(ts.createCall(ts.createPropertyAccess(localNames, "hasOwnProperty"), 
+                /*typeArguments*/ undefined, [n])));
+            }
+            return ts.createFunctionDeclaration(
+            /*decorators*/ undefined, 
+            /*modifiers*/ undefined, 
+            /*asteriskToken*/ undefined, exportStarFunction, 
+            /*typeParameters*/ undefined, [ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, m)], 
+            /*type*/ undefined, ts.createBlock([
+                ts.createVariableStatement(
+                /*modifiers*/ undefined, ts.createVariableDeclarationList([
+                    ts.createVariableDeclaration(exports, 
+                    /*type*/ undefined, ts.createObjectLiteral([]))
+                ])),
+                ts.createForIn(ts.createVariableDeclarationList([
+                    ts.createVariableDeclaration(n, /*type*/ undefined)
+                ]), m, ts.createBlock([
+                    ts.setEmitFlags(ts.createIf(condition, ts.createStatement(ts.createAssignment(ts.createElementAccess(exports, n), ts.createElementAccess(m, n)))), 1 /* SingleLine */)
+                ])),
+                ts.createStatement(ts.createCall(exportFunction, 
+                /*typeArguments*/ undefined, [exports]))
+            ], /*multiline*/ true));
         }
         /**
-         * Emits a setter callback for each dependency group.
-         * @param write The callback used to write each callback.
+         * Creates an array setter callbacks for each dependency group.
+         *
+         * @param exportStarFunction A reference to an exportStarFunction for the file.
+         * @param dependencyGroups An array of grouped dependencies.
          */
-        function generateSetters(exportStarFunction, dependencyGroups) {
+        function createSettersArray(exportStarFunction, dependencyGroups) {
             var setters = [];
             for (var _i = 0, dependencyGroups_1 = dependencyGroups; _i < dependencyGroups_1.length; _i++) {
                 var group = dependencyGroups_1[_i];
@@ -54688,19 +65944,19 @@ var ts;
                     var entry = _b[_a];
                     var importVariableName = ts.getLocalNameForExternalImport(entry, currentSourceFile);
                     switch (entry.kind) {
-                        case 230 /* ImportDeclaration */:
+                        case 238 /* ImportDeclaration */:
                             if (!entry.importClause) {
                                 // 'import "..."' case
                                 // module is imported only for side-effects, no emit required
                                 break;
                             }
-                        // fall-through
-                        case 229 /* ImportEqualsDeclaration */:
+                        // falls through
+                        case 237 /* ImportEqualsDeclaration */:
                             ts.Debug.assert(importVariableName !== undefined);
                             // save import into the local
                             statements.push(ts.createStatement(ts.createAssignment(importVariableName, parameterName)));
                             break;
-                        case 236 /* ExportDeclaration */:
+                        case 244 /* ExportDeclaration */:
                             ts.Debug.assert(importVariableName !== undefined);
                             if (entry.exportClause) {
                                 //  export {a, b as c} from 'foo'
@@ -54716,8 +65972,8 @@ var ts;
                                     var e = _d[_c];
                                     properties.push(ts.createPropertyAssignment(ts.createLiteral(e.name.text), ts.createElementAccess(parameterName, ts.createLiteral((e.propertyName || e.name).text))));
                                 }
-                                statements.push(ts.createStatement(ts.createCall(exportFunctionForFile, 
-                                /*typeArguments*/ undefined, [ts.createObjectLiteral(properties, /*location*/ undefined, /*multiline*/ true)])));
+                                statements.push(ts.createStatement(ts.createCall(exportFunction, 
+                                /*typeArguments*/ undefined, [ts.createObjectLiteral(properties, /*multiline*/ true)])));
                             }
                             else {
                                 //  export * from 'foo'
@@ -54732,386 +65988,658 @@ var ts;
                     }
                 }
                 setters.push(ts.createFunctionExpression(
+                /*modifiers*/ undefined, 
                 /*asteriskToken*/ undefined, 
                 /*name*/ undefined, 
-                /*typeParameters*/ undefined, [ts.createParameter(parameterName)], 
-                /*type*/ undefined, ts.createBlock(statements, /*location*/ undefined, /*multiLine*/ true)));
+                /*typeParameters*/ undefined, [ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, parameterName)], 
+                /*type*/ undefined, ts.createBlock(statements, /*multiLine*/ true)));
             }
-            return ts.createArrayLiteral(setters, /*location*/ undefined, /*multiLine*/ true);
+            return ts.createArrayLiteral(setters, /*multiLine*/ true);
         }
-        function visitSourceElement(node) {
+        //
+        // Top-level Source Element Visitors
+        //
+        /**
+         * Visit source elements at the top-level of a module.
+         *
+         * @param node The node to visit.
+         */
+        function sourceElementVisitor(node) {
             switch (node.kind) {
-                case 230 /* ImportDeclaration */:
+                case 238 /* ImportDeclaration */:
                     return visitImportDeclaration(node);
-                case 229 /* ImportEqualsDeclaration */:
+                case 237 /* ImportEqualsDeclaration */:
                     return visitImportEqualsDeclaration(node);
-                case 236 /* ExportDeclaration */:
-                    return visitExportDeclaration(node);
-                case 235 /* ExportAssignment */:
+                case 244 /* ExportDeclaration */:
+                    // ExportDeclarations are elided as they are handled via
+                    // `appendExportsOfDeclaration`.
+                    return undefined;
+                case 243 /* ExportAssignment */:
                     return visitExportAssignment(node);
                 default:
-                    return visitNestedNode(node);
-            }
-        }
-        function visitNestedNode(node) {
-            var savedEnclosingBlockScopedContainer = enclosingBlockScopedContainer;
-            var savedCurrentParent = currentParent;
-            var savedCurrentNode = currentNode;
-            var currentGrandparent = currentParent;
-            currentParent = currentNode;
-            currentNode = node;
-            if (currentParent && ts.isBlockScope(currentParent, currentGrandparent)) {
-                enclosingBlockScopedContainer = currentParent;
-            }
-            var result = visitNestedNodeWorker(node);
-            enclosingBlockScopedContainer = savedEnclosingBlockScopedContainer;
-            currentParent = savedCurrentParent;
-            currentNode = savedCurrentNode;
-            return result;
-        }
-        function visitNestedNodeWorker(node) {
-            switch (node.kind) {
-                case 200 /* VariableStatement */:
-                    return visitVariableStatement(node);
-                case 220 /* FunctionDeclaration */:
-                    return visitFunctionDeclaration(node);
-                case 221 /* ClassDeclaration */:
-                    return visitClassDeclaration(node);
-                case 206 /* ForStatement */:
-                    return visitForStatement(node);
-                case 207 /* ForInStatement */:
-                    return visitForInStatement(node);
-                case 208 /* ForOfStatement */:
-                    return visitForOfStatement(node);
-                case 204 /* DoStatement */:
-                    return visitDoStatement(node);
-                case 205 /* WhileStatement */:
-                    return visitWhileStatement(node);
-                case 214 /* LabeledStatement */:
-                    return visitLabeledStatement(node);
-                case 212 /* WithStatement */:
-                    return visitWithStatement(node);
-                case 213 /* SwitchStatement */:
-                    return visitSwitchStatement(node);
-                case 227 /* CaseBlock */:
-                    return visitCaseBlock(node);
-                case 249 /* CaseClause */:
-                    return visitCaseClause(node);
-                case 250 /* DefaultClause */:
-                    return visitDefaultClause(node);
-                case 216 /* TryStatement */:
-                    return visitTryStatement(node);
-                case 252 /* CatchClause */:
-                    return visitCatchClause(node);
-                case 199 /* Block */:
-                    return visitBlock(node);
-                case 202 /* ExpressionStatement */:
-                    return visitExpressionStatement(node);
-                default:
-                    return node;
+                    return nestedElementVisitor(node);
             }
         }
+        /**
+         * Visits an ImportDeclaration node.
+         *
+         * @param node The node to visit.
+         */
         function visitImportDeclaration(node) {
-            if (node.importClause && ts.contains(externalImports, node)) {
+            var statements;
+            if (node.importClause) {
                 hoistVariableDeclaration(ts.getLocalNameForExternalImport(node, currentSourceFile));
             }
-            return undefined;
+            if (hasAssociatedEndOfDeclarationMarker(node)) {
+                // Defer exports until we encounter an EndOfDeclarationMarker node
+                var id = ts.getOriginalNodeId(node);
+                deferredExports[id] = appendExportsOfImportDeclaration(deferredExports[id], node);
+            }
+            else {
+                statements = appendExportsOfImportDeclaration(statements, node);
+            }
+            return ts.singleOrMany(statements);
         }
+        /**
+         * Visits an ImportEqualsDeclaration node.
+         *
+         * @param node The node to visit.
+         */
         function visitImportEqualsDeclaration(node) {
-            if (ts.contains(externalImports, node)) {
-                hoistVariableDeclaration(ts.getLocalNameForExternalImport(node, currentSourceFile));
+            ts.Debug.assert(ts.isExternalModuleImportEqualsDeclaration(node), "import= for internal module references should be handled in an earlier transformer.");
+            var statements;
+            hoistVariableDeclaration(ts.getLocalNameForExternalImport(node, currentSourceFile));
+            if (hasAssociatedEndOfDeclarationMarker(node)) {
+                // Defer exports until we encounter an EndOfDeclarationMarker node
+                var id = ts.getOriginalNodeId(node);
+                deferredExports[id] = appendExportsOfImportEqualsDeclaration(deferredExports[id], node);
             }
-            // NOTE(rbuckton): Do we support export import = require('') in System?
-            return undefined;
+            else {
+                statements = appendExportsOfImportEqualsDeclaration(statements, node);
+            }
+            return ts.singleOrMany(statements);
         }
-        function visitExportDeclaration(node) {
-            if (!node.moduleSpecifier) {
-                var statements = [];
-                ts.addRange(statements, ts.map(node.exportClause.elements, visitExportSpecifier));
-                return statements;
+        /**
+         * Visits an ExportAssignment node.
+         *
+         * @param node The node to visit.
+         */
+        function visitExportAssignment(node) {
+            if (node.isExportEquals) {
+                // Elide `export=` as it is illegal in a SystemJS module.
+                return undefined;
+            }
+            var expression = ts.visitNode(node.expression, destructuringAndImportCallVisitor, ts.isExpression);
+            var original = node.original;
+            if (original && hasAssociatedEndOfDeclarationMarker(original)) {
+                // Defer exports until we encounter an EndOfDeclarationMarker node
+                var id = ts.getOriginalNodeId(node);
+                deferredExports[id] = appendExportStatement(deferredExports[id], ts.createIdentifier("default"), expression, /*allowComments*/ true);
+            }
+            else {
+                return createExportStatement(ts.createIdentifier("default"), expression, /*allowComments*/ true);
             }
-            return undefined;
         }
-        function visitExportSpecifier(specifier) {
-            if (resolver.getReferencedValueDeclaration(specifier.propertyName || specifier.name)
-                || resolver.isValueAliasDeclaration(specifier)) {
-                recordExportName(specifier.name);
-                return createExportStatement(specifier.name, specifier.propertyName || specifier.name);
+        /**
+         * Visits a FunctionDeclaration, hoisting it to the outer module body function.
+         *
+         * @param node The node to visit.
+         */
+        function visitFunctionDeclaration(node) {
+            if (ts.hasModifier(node, 1 /* Export */)) {
+                hoistedStatements = ts.append(hoistedStatements, ts.updateFunctionDeclaration(node, node.decorators, ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), node.asteriskToken, ts.getDeclarationName(node, /*allowComments*/ true, /*allowSourceMaps*/ true), 
+                /*typeParameters*/ undefined, ts.visitNodes(node.parameters, destructuringAndImportCallVisitor, ts.isParameterDeclaration), 
+                /*type*/ undefined, ts.visitNode(node.body, destructuringAndImportCallVisitor, ts.isBlock)));
+            }
+            else {
+                hoistedStatements = ts.append(hoistedStatements, ts.visitEachChild(node, destructuringAndImportCallVisitor, context));
+            }
+            if (hasAssociatedEndOfDeclarationMarker(node)) {
+                // Defer exports until we encounter an EndOfDeclarationMarker node
+                var id = ts.getOriginalNodeId(node);
+                deferredExports[id] = appendExportsOfHoistedDeclaration(deferredExports[id], node);
+            }
+            else {
+                hoistedStatements = appendExportsOfHoistedDeclaration(hoistedStatements, node);
             }
             return undefined;
         }
-        function visitExportAssignment(node) {
-            if (!node.isExportEquals) {
-                if (ts.nodeIsSynthesized(node) || resolver.isValueAliasDeclaration(node)) {
-                    return createExportStatement(ts.createLiteral("default"), node.expression);
-                }
+        /**
+         * Visits a ClassDeclaration, hoisting its name to the outer module body function.
+         *
+         * @param node The node to visit.
+         */
+        function visitClassDeclaration(node) {
+            var statements;
+            // Hoist the name of the class declaration to the outer module body function.
+            var name = ts.getLocalName(node);
+            hoistVariableDeclaration(name);
+            // Rewrite the class declaration into an assignment of a class expression.
+            statements = ts.append(statements, ts.setTextRange(ts.createStatement(ts.createAssignment(name, ts.setTextRange(ts.createClassExpression(
+            /*modifiers*/ undefined, node.name, 
+            /*typeParameters*/ undefined, ts.visitNodes(node.heritageClauses, destructuringAndImportCallVisitor, ts.isHeritageClause), ts.visitNodes(node.members, destructuringAndImportCallVisitor, ts.isClassElement)), node))), node));
+            if (hasAssociatedEndOfDeclarationMarker(node)) {
+                // Defer exports until we encounter an EndOfDeclarationMarker node
+                var id = ts.getOriginalNodeId(node);
+                deferredExports[id] = appendExportsOfHoistedDeclaration(deferredExports[id], node);
             }
-            return undefined;
+            else {
+                statements = appendExportsOfHoistedDeclaration(statements, node);
+            }
+            return ts.singleOrMany(statements);
         }
         /**
          * Visits a variable statement, hoisting declared names to the top-level module body.
          * Each declaration is rewritten into an assignment expression.
          *
-         * @param node The variable statement to visit.
+         * @param node The node to visit.
          */
         function visitVariableStatement(node) {
-            // hoist only non-block scoped declarations or block scoped declarations parented by source file
-            var shouldHoist = ((ts.getCombinedNodeFlags(ts.getOriginalNode(node.declarationList)) & 3 /* BlockScoped */) == 0) ||
-                enclosingBlockScopedContainer.kind === 256 /* SourceFile */;
-            if (!shouldHoist) {
-                return node;
+            if (!shouldHoistVariableDeclarationList(node.declarationList)) {
+                return ts.visitNode(node, destructuringAndImportCallVisitor, ts.isStatement);
             }
-            var isExported = ts.hasModifier(node, 1 /* Export */);
-            var expressions = [];
+            var expressions;
+            var isExportedDeclaration = ts.hasModifier(node, 1 /* Export */);
+            var isMarkedDeclaration = hasAssociatedEndOfDeclarationMarker(node);
             for (var _i = 0, _a = node.declarationList.declarations; _i < _a.length; _i++) {
                 var variable = _a[_i];
-                var visited = transformVariable(variable, isExported);
-                if (visited) {
-                    expressions.push(visited);
+                if (variable.initializer) {
+                    expressions = ts.append(expressions, transformInitializedVariable(variable, isExportedDeclaration && !isMarkedDeclaration));
+                }
+                else {
+                    hoistBindingElement(variable);
                 }
             }
-            if (expressions.length) {
-                return ts.createStatement(ts.inlineExpressions(expressions), node);
+            var statements;
+            if (expressions) {
+                statements = ts.append(statements, ts.setTextRange(ts.createStatement(ts.inlineExpressions(expressions)), node));
             }
-            return undefined;
+            if (isMarkedDeclaration) {
+                // Defer exports until we encounter an EndOfDeclarationMarker node
+                var id = ts.getOriginalNodeId(node);
+                deferredExports[id] = appendExportsOfVariableStatement(deferredExports[id], node, isExportedDeclaration);
+            }
+            else {
+                statements = appendExportsOfVariableStatement(statements, node, /*exportSelf*/ false);
+            }
+            return ts.singleOrMany(statements);
         }
         /**
-         * Transforms a VariableDeclaration into one or more assignment expressions.
+         * Hoists the declared names of a VariableDeclaration or BindingElement.
          *
-         * @param node The VariableDeclaration to transform.
-         * @param isExported A value used to indicate whether the containing statement was exported.
-         */
-        function transformVariable(node, isExported) {
-            // Hoist any bound names within the declaration.
-            hoistBindingElement(node, isExported);
-            if (!node.initializer) {
-                // If the variable has no initializer, ignore it.
-                return;
-            }
-            var name = node.name;
-            if (ts.isIdentifier(name)) {
-                // If the variable has an IdentifierName, write out an assignment expression in its place.
-                return ts.createAssignment(name, node.initializer);
+         * @param node The declaration to hoist.
+         */
+        function hoistBindingElement(node) {
+            if (ts.isBindingPattern(node.name)) {
+                for (var _i = 0, _a = node.name.elements; _i < _a.length; _i++) {
+                    var element = _a[_i];
+                    if (!ts.isOmittedExpression(element)) {
+                        hoistBindingElement(element);
+                    }
+                }
             }
             else {
-                // If the variable has a BindingPattern, flatten the variable into multiple assignment expressions.
-                return ts.flattenVariableDestructuringToExpression(context, node, hoistVariableDeclaration);
+                hoistVariableDeclaration(ts.getSynthesizedClone(node.name));
             }
         }
         /**
-         * Visits a FunctionDeclaration, hoisting it to the outer module body function.
+         * Determines whether a VariableDeclarationList should be hoisted.
          *
-         * @param node The function declaration to visit.
+         * @param node The node to test.
          */
-        function visitFunctionDeclaration(node) {
-            if (ts.hasModifier(node, 1 /* Export */)) {
-                // If the function is exported, ensure it has a name and rewrite the function without any export flags.
-                var name_42 = node.name || ts.getGeneratedNameForNode(node);
-                var newNode = ts.createFunctionDeclaration(
-                /*decorators*/ undefined, 
-                /*modifiers*/ undefined, node.asteriskToken, name_42, 
-                /*typeParameters*/ undefined, node.parameters, 
-                /*type*/ undefined, node.body, 
-                /*location*/ node);
-                // Record a declaration export in the outer module body function.
-                recordExportedFunctionDeclaration(node);
-                if (!ts.hasModifier(node, 512 /* Default */)) {
-                    recordExportName(name_42);
+        function shouldHoistVariableDeclarationList(node) {
+            // hoist only non-block scoped declarations or block scoped declarations parented by source file
+            return (ts.getEmitFlags(node) & 2097152 /* NoHoisting */) === 0
+                && (enclosingBlockScopedContainer.kind === 265 /* SourceFile */
+                    || (ts.getOriginalNode(node).flags & 3 /* BlockScoped */) === 0);
+        }
+        /**
+         * Transform an initialized variable declaration into an expression.
+         *
+         * @param node The node to transform.
+         * @param isExportedDeclaration A value indicating whether the variable is exported.
+         */
+        function transformInitializedVariable(node, isExportedDeclaration) {
+            var createAssignment = isExportedDeclaration ? createExportedVariableAssignment : createNonExportedVariableAssignment;
+            return ts.isBindingPattern(node.name)
+                ? ts.flattenDestructuringAssignment(node, destructuringAndImportCallVisitor, context, 0 /* All */, 
+                /*needsValue*/ false, createAssignment)
+                : createAssignment(node.name, ts.visitNode(node.initializer, destructuringAndImportCallVisitor, ts.isExpression));
+        }
+        /**
+         * Creates an assignment expression for an exported variable declaration.
+         *
+         * @param name The name of the variable.
+         * @param value The value of the variable's initializer.
+         * @param location The source map location for the assignment.
+         */
+        function createExportedVariableAssignment(name, value, location) {
+            return createVariableAssignment(name, value, location, /*isExportedDeclaration*/ true);
+        }
+        /**
+         * Creates an assignment expression for a non-exported variable declaration.
+         *
+         * @param name The name of the variable.
+         * @param value The value of the variable's initializer.
+         * @param location The source map location for the assignment.
+         */
+        function createNonExportedVariableAssignment(name, value, location) {
+            return createVariableAssignment(name, value, location, /*isExportedDeclaration*/ false);
+        }
+        /**
+         * Creates an assignment expression for a variable declaration.
+         *
+         * @param name The name of the variable.
+         * @param value The value of the variable's initializer.
+         * @param location The source map location for the assignment.
+         * @param isExportedDeclaration A value indicating whether the variable is exported.
+         */
+        function createVariableAssignment(name, value, location, isExportedDeclaration) {
+            hoistVariableDeclaration(ts.getSynthesizedClone(name));
+            return isExportedDeclaration
+                ? createExportExpression(name, preventSubstitution(ts.setTextRange(ts.createAssignment(name, value), location)))
+                : preventSubstitution(ts.setTextRange(ts.createAssignment(name, value), location));
+        }
+        /**
+         * Visits a MergeDeclarationMarker used as a placeholder for the beginning of a merged
+         * and transformed declaration.
+         *
+         * @param node The node to visit.
+         */
+        function visitMergeDeclarationMarker(node) {
+            // For an EnumDeclaration or ModuleDeclaration that merges with a preceeding
+            // declaration we do not emit a leading variable declaration. To preserve the
+            // begin/end semantics of the declararation and to properly handle exports
+            // we wrapped the leading variable declaration in a `MergeDeclarationMarker`.
+            //
+            // To balance the declaration, we defer the exports of the elided variable
+            // statement until we visit this declaration's `EndOfDeclarationMarker`.
+            if (hasAssociatedEndOfDeclarationMarker(node) && node.original.kind === 208 /* VariableStatement */) {
+                var id = ts.getOriginalNodeId(node);
+                var isExportedDeclaration = ts.hasModifier(node.original, 1 /* Export */);
+                deferredExports[id] = appendExportsOfVariableStatement(deferredExports[id], node.original, isExportedDeclaration);
+            }
+            return node;
+        }
+        /**
+         * Determines whether a node has an associated EndOfDeclarationMarker.
+         *
+         * @param node The node to test.
+         */
+        function hasAssociatedEndOfDeclarationMarker(node) {
+            return (ts.getEmitFlags(node) & 4194304 /* HasEndOfDeclarationMarker */) !== 0;
+        }
+        /**
+         * Visits a DeclarationMarker used as a placeholder for the end of a transformed
+         * declaration.
+         *
+         * @param node The node to visit.
+         */
+        function visitEndOfDeclarationMarker(node) {
+            // For some transformations we emit an `EndOfDeclarationMarker` to mark the actual
+            // end of the transformed declaration. We use this marker to emit any deferred exports
+            // of the declaration.
+            var id = ts.getOriginalNodeId(node);
+            var statements = deferredExports[id];
+            if (statements) {
+                delete deferredExports[id];
+                return ts.append(statements, node);
+            }
+            return node;
+        }
+        /**
+         * Appends the exports of an ImportDeclaration to a statement list, returning the
+         * statement list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param decl The declaration whose exports are to be recorded.
+         */
+        function appendExportsOfImportDeclaration(statements, decl) {
+            if (moduleInfo.exportEquals) {
+                return statements;
+            }
+            var importClause = decl.importClause;
+            if (!importClause) {
+                return statements;
+            }
+            if (importClause.name) {
+                statements = appendExportsOfDeclaration(statements, importClause);
+            }
+            var namedBindings = importClause.namedBindings;
+            if (namedBindings) {
+                switch (namedBindings.kind) {
+                    case 240 /* NamespaceImport */:
+                        statements = appendExportsOfDeclaration(statements, namedBindings);
+                        break;
+                    case 241 /* NamedImports */:
+                        for (var _i = 0, _a = namedBindings.elements; _i < _a.length; _i++) {
+                            var importBinding = _a[_i];
+                            statements = appendExportsOfDeclaration(statements, importBinding);
+                        }
+                        break;
                 }
-                ts.setOriginalNode(newNode, node);
-                node = newNode;
             }
-            // Hoist the function declaration to the outer module body function.
-            hoistFunctionDeclaration(node);
-            return undefined;
+            return statements;
         }
-        function visitExpressionStatement(node) {
-            var originalNode = ts.getOriginalNode(node);
-            if ((originalNode.kind === 225 /* ModuleDeclaration */ || originalNode.kind === 224 /* EnumDeclaration */) && ts.hasModifier(originalNode, 1 /* Export */)) {
-                var name_43 = getDeclarationName(originalNode);
-                // We only need to hoistVariableDeclaration for EnumDeclaration
-                // as ModuleDeclaration is already hoisted when the transformer call visitVariableStatement
-                // which then call transformsVariable for each declaration in declarationList
-                if (originalNode.kind === 224 /* EnumDeclaration */) {
-                    hoistVariableDeclaration(name_43);
+        /**
+         * Appends the export of an ImportEqualsDeclaration to a statement list, returning the
+         * statement list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param decl The declaration whose exports are to be recorded.
+         */
+        function appendExportsOfImportEqualsDeclaration(statements, decl) {
+            if (moduleInfo.exportEquals) {
+                return statements;
+            }
+            return appendExportsOfDeclaration(statements, decl);
+        }
+        /**
+         * Appends the exports of a VariableStatement to a statement list, returning the statement
+         * list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param node The VariableStatement whose exports are to be recorded.
+         * @param exportSelf A value indicating whether to also export each VariableDeclaration of
+         * `nodes` declaration list.
+         */
+        function appendExportsOfVariableStatement(statements, node, exportSelf) {
+            if (moduleInfo.exportEquals) {
+                return statements;
+            }
+            for (var _i = 0, _a = node.declarationList.declarations; _i < _a.length; _i++) {
+                var decl = _a[_i];
+                if (decl.initializer || exportSelf) {
+                    statements = appendExportsOfBindingElement(statements, decl, exportSelf);
                 }
-                return [
-                    node,
-                    createExportStatement(name_43, name_43)
-                ];
             }
-            return node;
+            return statements;
         }
         /**
-         * Visits a ClassDeclaration, hoisting its name to the outer module body function.
+         * Appends the exports of a VariableDeclaration or BindingElement to a statement list,
+         * returning the statement list.
          *
-         * @param node The class declaration to visit.
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param decl The declaration whose exports are to be recorded.
+         * @param exportSelf A value indicating whether to also export the declaration itself.
          */
-        function visitClassDeclaration(node) {
-            // Hoist the name of the class declaration to the outer module body function.
-            var name = getDeclarationName(node);
-            hoistVariableDeclaration(name);
-            var statements = [];
-            // Rewrite the class declaration into an assignment of a class expression.
-            statements.push(ts.createStatement(ts.createAssignment(name, ts.createClassExpression(
-            /*modifiers*/ undefined, node.name, 
-            /*typeParameters*/ undefined, node.heritageClauses, node.members, 
-            /*location*/ node)), 
-            /*location*/ node));
-            // If the class was exported, write a declaration export to the inner module body function.
-            if (ts.hasModifier(node, 1 /* Export */)) {
-                if (!ts.hasModifier(node, 512 /* Default */)) {
-                    recordExportName(name);
+        function appendExportsOfBindingElement(statements, decl, exportSelf) {
+            if (moduleInfo.exportEquals) {
+                return statements;
+            }
+            if (ts.isBindingPattern(decl.name)) {
+                for (var _i = 0, _a = decl.name.elements; _i < _a.length; _i++) {
+                    var element = _a[_i];
+                    if (!ts.isOmittedExpression(element)) {
+                        statements = appendExportsOfBindingElement(statements, element, exportSelf);
+                    }
+                }
+            }
+            else if (!ts.isGeneratedIdentifier(decl.name)) {
+                var excludeName = void 0;
+                if (exportSelf) {
+                    statements = appendExportStatement(statements, decl.name, ts.getLocalName(decl));
+                    excludeName = decl.name.text;
+                }
+                statements = appendExportsOfDeclaration(statements, decl, excludeName);
+            }
+            return statements;
+        }
+        /**
+         * Appends the exports of a ClassDeclaration or FunctionDeclaration to a statement list,
+         * returning the statement list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param decl The declaration whose exports are to be recorded.
+         */
+        function appendExportsOfHoistedDeclaration(statements, decl) {
+            if (moduleInfo.exportEquals) {
+                return statements;
+            }
+            var excludeName;
+            if (ts.hasModifier(decl, 1 /* Export */)) {
+                var exportName = ts.hasModifier(decl, 512 /* Default */) ? ts.createLiteral("default") : decl.name;
+                statements = appendExportStatement(statements, exportName, ts.getLocalName(decl));
+                excludeName = exportName.text;
+            }
+            if (decl.name) {
+                statements = appendExportsOfDeclaration(statements, decl, excludeName);
+            }
+            return statements;
+        }
+        /**
+         * Appends the exports of a declaration to a statement list, returning the statement list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param decl The declaration to export.
+         * @param excludeName An optional name to exclude from exports.
+         */
+        function appendExportsOfDeclaration(statements, decl, excludeName) {
+            if (moduleInfo.exportEquals) {
+                return statements;
+            }
+            var name = ts.getDeclarationName(decl);
+            var exportSpecifiers = moduleInfo.exportSpecifiers.get(name.text);
+            if (exportSpecifiers) {
+                for (var _i = 0, exportSpecifiers_2 = exportSpecifiers; _i < exportSpecifiers_2.length; _i++) {
+                    var exportSpecifier = exportSpecifiers_2[_i];
+                    if (exportSpecifier.name.text !== excludeName) {
+                        statements = appendExportStatement(statements, exportSpecifier.name, name);
+                    }
                 }
-                statements.push(createDeclarationExport(node));
             }
-            return statements;
-        }
-        function shouldHoistLoopInitializer(node) {
-            return ts.isVariableDeclarationList(node) && (ts.getCombinedNodeFlags(node) & 3 /* BlockScoped */) === 0;
+            return statements;
+        }
+        /**
+         * Appends the down-level representation of an export to a statement list, returning the
+         * statement list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param exportName The name of the export.
+         * @param expression The expression to export.
+         * @param allowComments Whether to allow comments on the export.
+         */
+        function appendExportStatement(statements, exportName, expression, allowComments) {
+            statements = ts.append(statements, createExportStatement(exportName, expression, allowComments));
+            return statements;
+        }
+        /**
+         * Creates a call to the current file's export function to export a value.
+         *
+         * @param name The bound name of the export.
+         * @param value The exported value.
+         * @param allowComments An optional value indicating whether to emit comments for the statement.
+         */
+        function createExportStatement(name, value, allowComments) {
+            var statement = ts.createStatement(createExportExpression(name, value));
+            ts.startOnNewLine(statement);
+            if (!allowComments) {
+                ts.setEmitFlags(statement, 1536 /* NoComments */);
+            }
+            return statement;
+        }
+        /**
+         * Creates a call to the current file's export function to export a value.
+         *
+         * @param name The bound name of the export.
+         * @param value The exported value.
+         */
+        function createExportExpression(name, value) {
+            var exportName = ts.isIdentifier(name) ? ts.createLiteral(name) : name;
+            return ts.createCall(exportFunction, /*typeArguments*/ undefined, [exportName, value]);
+        }
+        //
+        // Top-Level or Nested Source Element Visitors
+        //
+        /**
+         * Visit nested elements at the top-level of a module.
+         *
+         * @param node The node to visit.
+         */
+        function nestedElementVisitor(node) {
+            switch (node.kind) {
+                case 208 /* VariableStatement */:
+                    return visitVariableStatement(node);
+                case 228 /* FunctionDeclaration */:
+                    return visitFunctionDeclaration(node);
+                case 229 /* ClassDeclaration */:
+                    return visitClassDeclaration(node);
+                case 214 /* ForStatement */:
+                    return visitForStatement(node);
+                case 215 /* ForInStatement */:
+                    return visitForInStatement(node);
+                case 216 /* ForOfStatement */:
+                    return visitForOfStatement(node);
+                case 212 /* DoStatement */:
+                    return visitDoStatement(node);
+                case 213 /* WhileStatement */:
+                    return visitWhileStatement(node);
+                case 222 /* LabeledStatement */:
+                    return visitLabeledStatement(node);
+                case 220 /* WithStatement */:
+                    return visitWithStatement(node);
+                case 221 /* SwitchStatement */:
+                    return visitSwitchStatement(node);
+                case 235 /* CaseBlock */:
+                    return visitCaseBlock(node);
+                case 257 /* CaseClause */:
+                    return visitCaseClause(node);
+                case 258 /* DefaultClause */:
+                    return visitDefaultClause(node);
+                case 224 /* TryStatement */:
+                    return visitTryStatement(node);
+                case 260 /* CatchClause */:
+                    return visitCatchClause(node);
+                case 207 /* Block */:
+                    return visitBlock(node);
+                case 299 /* MergeDeclarationMarker */:
+                    return visitMergeDeclarationMarker(node);
+                case 300 /* EndOfDeclarationMarker */:
+                    return visitEndOfDeclarationMarker(node);
+                default:
+                    return destructuringAndImportCallVisitor(node);
+            }
         }
         /**
          * Visits the body of a ForStatement to hoist declarations.
          *
-         * @param node The statement to visit.
+         * @param node The node to visit.
          */
         function visitForStatement(node) {
-            var initializer = node.initializer;
-            if (shouldHoistLoopInitializer(initializer)) {
-                var expressions = [];
-                for (var _i = 0, _a = initializer.declarations; _i < _a.length; _i++) {
-                    var variable = _a[_i];
-                    var visited = transformVariable(variable, /*isExported*/ false);
-                    if (visited) {
-                        expressions.push(visited);
-                    }
-                }
-                ;
-                return ts.createFor(expressions.length
-                    ? ts.inlineExpressions(expressions)
-                    : ts.createSynthesizedNode(193 /* OmittedExpression */), node.condition, node.incrementor, ts.visitNode(node.statement, visitNestedNode, ts.isStatement), 
-                /*location*/ node);
-            }
-            else {
-                return ts.visitEachChild(node, visitNestedNode, context);
-            }
-        }
-        /**
-         * Transforms and hoists the declaration list of a ForInStatement or ForOfStatement into an expression.
-         *
-         * @param node The decalaration list to transform.
-         */
-        function transformForBinding(node) {
-            var firstDeclaration = ts.firstOrUndefined(node.declarations);
-            hoistBindingElement(firstDeclaration, /*isExported*/ false);
-            var name = firstDeclaration.name;
-            return ts.isIdentifier(name)
-                ? name
-                : ts.flattenVariableDestructuringToExpression(context, firstDeclaration, hoistVariableDeclaration);
+            var savedEnclosingBlockScopedContainer = enclosingBlockScopedContainer;
+            enclosingBlockScopedContainer = node;
+            node = ts.updateFor(node, visitForInitializer(node.initializer), ts.visitNode(node.condition, destructuringAndImportCallVisitor, ts.isExpression), ts.visitNode(node.incrementor, destructuringAndImportCallVisitor, ts.isExpression), ts.visitNode(node.statement, nestedElementVisitor, ts.isStatement));
+            enclosingBlockScopedContainer = savedEnclosingBlockScopedContainer;
+            return node;
         }
         /**
          * Visits the body of a ForInStatement to hoist declarations.
          *
-         * @param node The statement to visit.
+         * @param node The node to visit.
          */
         function visitForInStatement(node) {
-            var initializer = node.initializer;
-            if (shouldHoistLoopInitializer(initializer)) {
-                var updated = ts.getMutableClone(node);
-                updated.initializer = transformForBinding(initializer);
-                updated.statement = ts.visitNode(node.statement, visitNestedNode, ts.isStatement, /*optional*/ false, ts.liftToBlock);
-                return updated;
-            }
-            else {
-                return ts.visitEachChild(node, visitNestedNode, context);
-            }
+            var savedEnclosingBlockScopedContainer = enclosingBlockScopedContainer;
+            enclosingBlockScopedContainer = node;
+            node = ts.updateForIn(node, visitForInitializer(node.initializer), ts.visitNode(node.expression, destructuringAndImportCallVisitor, ts.isExpression), ts.visitNode(node.statement, nestedElementVisitor, ts.isStatement, ts.liftToBlock));
+            enclosingBlockScopedContainer = savedEnclosingBlockScopedContainer;
+            return node;
         }
         /**
          * Visits the body of a ForOfStatement to hoist declarations.
          *
-         * @param node The statement to visit.
+         * @param node The node to visit.
          */
         function visitForOfStatement(node) {
-            var initializer = node.initializer;
-            if (shouldHoistLoopInitializer(initializer)) {
-                var updated = ts.getMutableClone(node);
-                updated.initializer = transformForBinding(initializer);
-                updated.statement = ts.visitNode(node.statement, visitNestedNode, ts.isStatement, /*optional*/ false, ts.liftToBlock);
-                return updated;
+            var savedEnclosingBlockScopedContainer = enclosingBlockScopedContainer;
+            enclosingBlockScopedContainer = node;
+            node = ts.updateForOf(node, node.awaitModifier, visitForInitializer(node.initializer), ts.visitNode(node.expression, destructuringAndImportCallVisitor, ts.isExpression), ts.visitNode(node.statement, nestedElementVisitor, ts.isStatement, ts.liftToBlock));
+            enclosingBlockScopedContainer = savedEnclosingBlockScopedContainer;
+            return node;
+        }
+        /**
+         * Determines whether to hoist the initializer of a ForStatement, ForInStatement, or
+         * ForOfStatement.
+         *
+         * @param node The node to test.
+         */
+        function shouldHoistForInitializer(node) {
+            return ts.isVariableDeclarationList(node)
+                && shouldHoistVariableDeclarationList(node);
+        }
+        /**
+         * Visits the initializer of a ForStatement, ForInStatement, or ForOfStatement
+         *
+         * @param node The node to visit.
+         */
+        function visitForInitializer(node) {
+            if (!node) {
+                return node;
+            }
+            if (shouldHoistForInitializer(node)) {
+                var expressions = void 0;
+                for (var _i = 0, _a = node.declarations; _i < _a.length; _i++) {
+                    var variable = _a[_i];
+                    expressions = ts.append(expressions, transformInitializedVariable(variable, /*isExportedDeclaration*/ false));
+                }
+                return expressions ? ts.inlineExpressions(expressions) : ts.createOmittedExpression();
             }
             else {
-                return ts.visitEachChild(node, visitNestedNode, context);
+                return ts.visitEachChild(node, nestedElementVisitor, context);
             }
         }
         /**
          * Visits the body of a DoStatement to hoist declarations.
          *
-         * @param node The statement to visit.
+         * @param node The node to visit.
          */
         function visitDoStatement(node) {
-            var statement = ts.visitNode(node.statement, visitNestedNode, ts.isStatement, /*optional*/ false, ts.liftToBlock);
-            if (statement !== node.statement) {
-                var updated = ts.getMutableClone(node);
-                updated.statement = statement;
-                return updated;
-            }
-            return node;
+            return ts.updateDo(node, ts.visitNode(node.statement, nestedElementVisitor, ts.isStatement, ts.liftToBlock), ts.visitNode(node.expression, destructuringAndImportCallVisitor, ts.isExpression));
         }
         /**
          * Visits the body of a WhileStatement to hoist declarations.
          *
-         * @param node The statement to visit.
+         * @param node The node to visit.
          */
         function visitWhileStatement(node) {
-            var statement = ts.visitNode(node.statement, visitNestedNode, ts.isStatement, /*optional*/ false, ts.liftToBlock);
-            if (statement !== node.statement) {
-                var updated = ts.getMutableClone(node);
-                updated.statement = statement;
-                return updated;
-            }
-            return node;
+            return ts.updateWhile(node, ts.visitNode(node.expression, destructuringAndImportCallVisitor, ts.isExpression), ts.visitNode(node.statement, nestedElementVisitor, ts.isStatement, ts.liftToBlock));
         }
         /**
          * Visits the body of a LabeledStatement to hoist declarations.
          *
-         * @param node The statement to visit.
+         * @param node The node to visit.
          */
         function visitLabeledStatement(node) {
-            var statement = ts.visitNode(node.statement, visitNestedNode, ts.isStatement, /*optional*/ false, ts.liftToBlock);
-            if (statement !== node.statement) {
-                var updated = ts.getMutableClone(node);
-                updated.statement = statement;
-                return updated;
-            }
-            return node;
+            return ts.updateLabel(node, node.label, ts.visitNode(node.statement, nestedElementVisitor, ts.isStatement, ts.liftToBlock));
         }
         /**
          * Visits the body of a WithStatement to hoist declarations.
          *
-         * @param node The statement to visit.
+         * @param node The node to visit.
          */
         function visitWithStatement(node) {
-            var statement = ts.visitNode(node.statement, visitNestedNode, ts.isStatement, /*optional*/ false, ts.liftToBlock);
-            if (statement !== node.statement) {
-                var updated = ts.getMutableClone(node);
-                updated.statement = statement;
-                return updated;
-            }
-            return node;
+            return ts.updateWith(node, ts.visitNode(node.expression, destructuringAndImportCallVisitor, ts.isExpression), ts.visitNode(node.statement, nestedElementVisitor, ts.isStatement, ts.liftToBlock));
         }
         /**
          * Visits the body of a SwitchStatement to hoist declarations.
          *
-         * @param node The statement to visit.
+         * @param node The node to visit.
          */
         function visitSwitchStatement(node) {
-            var caseBlock = ts.visitNode(node.caseBlock, visitNestedNode, ts.isCaseBlock);
-            if (caseBlock !== node.caseBlock) {
-                var updated = ts.getMutableClone(node);
-                updated.caseBlock = caseBlock;
-                return updated;
-            }
-            return node;
+            return ts.updateSwitch(node, ts.visitNode(node.expression, destructuringAndImportCallVisitor, ts.isExpression), ts.visitNode(node.caseBlock, nestedElementVisitor, ts.isCaseBlock));
         }
         /**
          * Visits the body of a CaseBlock to hoist declarations.
@@ -55119,402 +66647,366 @@ var ts;
          * @param node The node to visit.
          */
         function visitCaseBlock(node) {
-            var clauses = ts.visitNodes(node.clauses, visitNestedNode, ts.isCaseOrDefaultClause);
-            if (clauses !== node.clauses) {
-                var updated = ts.getMutableClone(node);
-                updated.clauses = clauses;
-                return updated;
-            }
+            var savedEnclosingBlockScopedContainer = enclosingBlockScopedContainer;
+            enclosingBlockScopedContainer = node;
+            node = ts.updateCaseBlock(node, ts.visitNodes(node.clauses, nestedElementVisitor, ts.isCaseOrDefaultClause));
+            enclosingBlockScopedContainer = savedEnclosingBlockScopedContainer;
             return node;
         }
         /**
          * Visits the body of a CaseClause to hoist declarations.
          *
-         * @param node The clause to visit.
+         * @param node The node to visit.
          */
         function visitCaseClause(node) {
-            var statements = ts.visitNodes(node.statements, visitNestedNode, ts.isStatement);
-            if (statements !== node.statements) {
-                var updated = ts.getMutableClone(node);
-                updated.statements = statements;
-                return updated;
-            }
-            return node;
+            return ts.updateCaseClause(node, ts.visitNode(node.expression, destructuringAndImportCallVisitor, ts.isExpression), ts.visitNodes(node.statements, nestedElementVisitor, ts.isStatement));
         }
         /**
          * Visits the body of a DefaultClause to hoist declarations.
          *
-         * @param node The clause to visit.
+         * @param node The node to visit.
          */
         function visitDefaultClause(node) {
-            return ts.visitEachChild(node, visitNestedNode, context);
+            return ts.visitEachChild(node, nestedElementVisitor, context);
         }
         /**
          * Visits the body of a TryStatement to hoist declarations.
          *
-         * @param node The statement to visit.
+         * @param node The node to visit.
          */
         function visitTryStatement(node) {
-            return ts.visitEachChild(node, visitNestedNode, context);
+            return ts.visitEachChild(node, nestedElementVisitor, context);
         }
         /**
          * Visits the body of a CatchClause to hoist declarations.
          *
-         * @param node The clause to visit.
+         * @param node The node to visit.
          */
         function visitCatchClause(node) {
-            var block = ts.visitNode(node.block, visitNestedNode, ts.isBlock);
-            if (block !== node.block) {
-                var updated = ts.getMutableClone(node);
-                updated.block = block;
-                return updated;
-            }
+            var savedEnclosingBlockScopedContainer = enclosingBlockScopedContainer;
+            enclosingBlockScopedContainer = node;
+            node = ts.updateCatchClause(node, node.variableDeclaration, ts.visitNode(node.block, nestedElementVisitor, ts.isBlock));
+            enclosingBlockScopedContainer = savedEnclosingBlockScopedContainer;
             return node;
         }
         /**
          * Visits the body of a Block to hoist declarations.
          *
-         * @param node The block to visit.
+         * @param node The node to visit.
          */
         function visitBlock(node) {
-            return ts.visitEachChild(node, visitNestedNode, context);
+            var savedEnclosingBlockScopedContainer = enclosingBlockScopedContainer;
+            enclosingBlockScopedContainer = node;
+            node = ts.visitEachChild(node, nestedElementVisitor, context);
+            enclosingBlockScopedContainer = savedEnclosingBlockScopedContainer;
+            return node;
         }
         //
-        // Substitutions
+        // Destructuring Assignment Visitors
         //
-        function onEmitNode(emitContext, node, emitCallback) {
-            if (node.kind === 256 /* SourceFile */) {
-                exportFunctionForFile = exportFunctionForFileMap[ts.getOriginalNodeId(node)];
-                previousOnEmitNode(emitContext, node, emitCallback);
-                exportFunctionForFile = undefined;
-            }
-            else {
-                previousOnEmitNode(emitContext, node, emitCallback);
-            }
-        }
         /**
-         * Hooks node substitutions.
+         * Visit nodes to flatten destructuring assignments to exported symbols.
          *
-         * @param node The node to substitute.
-         * @param isExpression A value indicating whether the node is to be used in an expression
-         *                     position.
+         * @param node The node to visit.
          */
-        function onSubstituteNode(emitContext, node) {
-            node = previousOnSubstituteNode(emitContext, node);
-            if (emitContext === 1 /* Expression */) {
-                return substituteExpression(node);
+        function destructuringAndImportCallVisitor(node) {
+            if (node.transformFlags & 1024 /* DestructuringAssignment */
+                && node.kind === 194 /* BinaryExpression */) {
+                return visitDestructuringAssignment(node);
             }
-            return node;
+            else if (ts.isImportCall(node)) {
+                return visitImportCallExpression(node);
+            }
+            else if ((node.transformFlags & 2048 /* ContainsDestructuringAssignment */) || (node.transformFlags & 67108864 /* ContainsDynamicImport */)) {
+                return ts.visitEachChild(node, destructuringAndImportCallVisitor, context);
+            }
+            else {
+                return node;
+            }
+        }
+        function visitImportCallExpression(node) {
+            // import("./blah")
+            // emit as
+            // System.register([], function (_export, _context) {
+            //     return {
+            //         setters: [],
+            //         execute: () => {
+            //             _context.import('./blah');
+            //         }
+            //     };
+            // });
+            return ts.createCall(ts.createPropertyAccess(contextObject, ts.createIdentifier("import")), 
+            /*typeArguments*/ undefined, node.arguments);
         }
         /**
-         * Substitute the expression, if necessary.
+         * Visits a DestructuringAssignment to flatten destructuring to exported symbols.
          *
-         * @param node The node to substitute.
+         * @param node The node to visit.
          */
-        function substituteExpression(node) {
-            switch (node.kind) {
-                case 69 /* Identifier */:
-                    return substituteExpressionIdentifier(node);
-                case 187 /* BinaryExpression */:
-                    return substituteBinaryExpression(node);
-                case 185 /* PrefixUnaryExpression */:
-                case 186 /* PostfixUnaryExpression */:
-                    return substituteUnaryExpression(node);
+        function visitDestructuringAssignment(node) {
+            if (hasExportedReferenceInDestructuringTarget(node.left)) {
+                return ts.flattenDestructuringAssignment(node, destructuringAndImportCallVisitor, context, 0 /* All */, 
+                /*needsValue*/ true);
             }
-            return node;
+            return ts.visitEachChild(node, destructuringAndImportCallVisitor, context);
         }
         /**
-         * Substitution for identifiers exported at the top level of a module.
+         * Determines whether the target of a destructuring assigment refers to an exported symbol.
+         *
+         * @param node The destructuring target.
          */
-        function substituteExpressionIdentifier(node) {
-            var importDeclaration = resolver.getReferencedImportDeclaration(node);
-            if (importDeclaration) {
-                var importBinding = createImportBinding(importDeclaration);
-                if (importBinding) {
-                    return importBinding;
-                }
+        function hasExportedReferenceInDestructuringTarget(node) {
+            if (ts.isAssignmentExpression(node, /*excludeCompoundAssignment*/ true)) {
+                return hasExportedReferenceInDestructuringTarget(node.left);
             }
-            return node;
-        }
-        function substituteBinaryExpression(node) {
-            if (ts.isAssignmentOperator(node.operatorToken.kind)) {
-                return substituteAssignmentExpression(node);
+            else if (ts.isSpreadElement(node)) {
+                return hasExportedReferenceInDestructuringTarget(node.expression);
             }
-            return node;
-        }
-        function substituteAssignmentExpression(node) {
-            ts.setEmitFlags(node, 128 /* NoSubstitution */);
-            var left = node.left;
-            switch (left.kind) {
-                case 69 /* Identifier */:
-                    var exportDeclaration = resolver.getReferencedExportContainer(left);
-                    if (exportDeclaration) {
-                        return createExportExpression(left, node);
-                    }
-                    break;
-                case 171 /* ObjectLiteralExpression */:
-                case 170 /* ArrayLiteralExpression */:
-                    if (hasExportedReferenceInDestructuringPattern(left)) {
-                        return substituteDestructuring(node);
-                    }
-                    break;
+            else if (ts.isObjectLiteralExpression(node)) {
+                return ts.some(node.properties, hasExportedReferenceInDestructuringTarget);
             }
-            return node;
-        }
-        function isExportedBinding(name) {
-            var container = resolver.getReferencedExportContainer(name);
-            return container && container.kind === 256 /* SourceFile */;
-        }
-        function hasExportedReferenceInDestructuringPattern(node) {
-            switch (node.kind) {
-                case 69 /* Identifier */:
-                    return isExportedBinding(node);
-                case 171 /* ObjectLiteralExpression */:
-                    for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
-                        var property = _a[_i];
-                        if (hasExportedReferenceInObjectDestructuringElement(property)) {
-                            return true;
-                        }
-                    }
-                    break;
-                case 170 /* ArrayLiteralExpression */:
-                    for (var _b = 0, _c = node.elements; _b < _c.length; _b++) {
-                        var element = _c[_b];
-                        if (hasExportedReferenceInArrayDestructuringElement(element)) {
-                            return true;
-                        }
-                    }
-                    break;
+            else if (ts.isArrayLiteralExpression(node)) {
+                return ts.some(node.elements, hasExportedReferenceInDestructuringTarget);
             }
-            return false;
-        }
-        function hasExportedReferenceInObjectDestructuringElement(node) {
-            if (ts.isShorthandPropertyAssignment(node)) {
-                return isExportedBinding(node.name);
+            else if (ts.isShorthandPropertyAssignment(node)) {
+                return hasExportedReferenceInDestructuringTarget(node.name);
             }
             else if (ts.isPropertyAssignment(node)) {
-                return hasExportedReferenceInDestructuringElement(node.initializer);
-            }
-            else {
-                return false;
-            }
-        }
-        function hasExportedReferenceInArrayDestructuringElement(node) {
-            if (ts.isSpreadElementExpression(node)) {
-                var expression = node.expression;
-                return ts.isIdentifier(expression) && isExportedBinding(expression);
-            }
-            else {
-                return hasExportedReferenceInDestructuringElement(node);
-            }
-        }
-        function hasExportedReferenceInDestructuringElement(node) {
-            if (ts.isBinaryExpression(node)) {
-                var left = node.left;
-                return node.operatorToken.kind === 56 /* EqualsToken */
-                    && isDestructuringPattern(left)
-                    && hasExportedReferenceInDestructuringPattern(left);
+                return hasExportedReferenceInDestructuringTarget(node.initializer);
             }
             else if (ts.isIdentifier(node)) {
-                return isExportedBinding(node);
-            }
-            else if (ts.isSpreadElementExpression(node)) {
-                var expression = node.expression;
-                return ts.isIdentifier(expression) && isExportedBinding(expression);
-            }
-            else if (isDestructuringPattern(node)) {
-                return hasExportedReferenceInDestructuringPattern(node);
+                var container = resolver.getReferencedExportContainer(node);
+                return container !== undefined && container.kind === 265 /* SourceFile */;
             }
             else {
                 return false;
             }
         }
-        function isDestructuringPattern(node) {
-            var kind = node.kind;
-            return kind === 69 /* Identifier */
-                || kind === 171 /* ObjectLiteralExpression */
-                || kind === 170 /* ArrayLiteralExpression */;
-        }
-        function substituteDestructuring(node) {
-            return ts.flattenDestructuringAssignment(context, node, /*needsValue*/ true, hoistVariableDeclaration);
-        }
-        function substituteUnaryExpression(node) {
-            var operand = node.operand;
-            var operator = node.operator;
-            var substitute = ts.isIdentifier(operand) &&
-                (node.kind === 186 /* PostfixUnaryExpression */ ||
-                    (node.kind === 185 /* PrefixUnaryExpression */ && (operator === 41 /* PlusPlusToken */ || operator === 42 /* MinusMinusToken */)));
-            if (substitute) {
-                var exportDeclaration = resolver.getReferencedExportContainer(operand);
-                if (exportDeclaration) {
-                    var expr = ts.createPrefix(node.operator, operand, node);
-                    ts.setEmitFlags(expr, 128 /* NoSubstitution */);
-                    var call = createExportExpression(operand, expr);
-                    if (node.kind === 185 /* PrefixUnaryExpression */) {
-                        return call;
-                    }
-                    else {
-                        // export function returns the value that was passes as the second argument
-                        // however for postfix unary expressions result value should be the value before modification.
-                        // emit 'x++' as '(export('x', ++x) - 1)' and 'x--' as '(export('x', --x) + 1)'
-                        return operator === 41 /* PlusPlusToken */
-                            ? ts.createSubtract(call, ts.createLiteral(1))
-                            : ts.createAdd(call, ts.createLiteral(1));
-                    }
-                }
+        //
+        // Modifier Visitors
+        //
+        /**
+         * Visit nodes to elide module-specific modifiers.
+         *
+         * @param node The node to visit.
+         */
+        function modifierVisitor(node) {
+            switch (node.kind) {
+                case 84 /* ExportKeyword */:
+                case 79 /* DefaultKeyword */:
+                    return undefined;
             }
             return node;
         }
+        //
+        // Emit Notification
+        //
         /**
-         * Gets a name to use for a DeclarationStatement.
-         * @param node The declaration statement.
+         * Hook for node emit notifications.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to emit.
+         * @param emitCallback A callback used to emit the node in the printer.
          */
-        function getDeclarationName(node) {
-            return node.name ? ts.getSynthesizedClone(node.name) : ts.getGeneratedNameForNode(node);
-        }
-        function addExportStarFunction(statements, localNames) {
-            var exportStarFunction = ts.createUniqueName("exportStar");
-            var m = ts.createIdentifier("m");
-            var n = ts.createIdentifier("n");
-            var exports = ts.createIdentifier("exports");
-            var condition = ts.createStrictInequality(n, ts.createLiteral("default"));
-            if (localNames) {
-                condition = ts.createLogicalAnd(condition, ts.createLogicalNot(ts.createHasOwnProperty(localNames, n)));
+        function onEmitNode(hint, node, emitCallback) {
+            if (node.kind === 265 /* SourceFile */) {
+                var id = ts.getOriginalNodeId(node);
+                currentSourceFile = node;
+                moduleInfo = moduleInfoMap[id];
+                exportFunction = exportFunctionsMap[id];
+                noSubstitution = noSubstitutionMap[id];
+                if (noSubstitution) {
+                    delete noSubstitutionMap[id];
+                }
+                previousOnEmitNode(hint, node, emitCallback);
+                currentSourceFile = undefined;
+                moduleInfo = undefined;
+                exportFunction = undefined;
+                noSubstitution = undefined;
+            }
+            else {
+                previousOnEmitNode(hint, node, emitCallback);
             }
-            statements.push(ts.createFunctionDeclaration(
-            /*decorators*/ undefined, 
-            /*modifiers*/ undefined, 
-            /*asteriskToken*/ undefined, exportStarFunction, 
-            /*typeParameters*/ undefined, [ts.createParameter(m)], 
-            /*type*/ undefined, ts.createBlock([
-                ts.createVariableStatement(
-                /*modifiers*/ undefined, ts.createVariableDeclarationList([
-                    ts.createVariableDeclaration(exports, 
-                    /*type*/ undefined, ts.createObjectLiteral([]))
-                ])),
-                ts.createForIn(ts.createVariableDeclarationList([
-                    ts.createVariableDeclaration(n, /*type*/ undefined)
-                ]), m, ts.createBlock([
-                    ts.setEmitFlags(ts.createIf(condition, ts.createStatement(ts.createAssignment(ts.createElementAccess(exports, n), ts.createElementAccess(m, n)))), 32 /* SingleLine */)
-                ])),
-                ts.createStatement(ts.createCall(exportFunctionForFile, 
-                /*typeArguments*/ undefined, [exports]))
-            ], 
-            /*location*/ undefined, 
-            /*multiline*/ true)));
-            return exportStarFunction;
         }
+        //
+        // Substitutions
+        //
         /**
-         * Creates a call to the current file's export function to export a value.
-         * @param name The bound name of the export.
-         * @param value The exported value.
+         * Hooks node substitutions.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to substitute.
          */
-        function createExportExpression(name, value) {
-            var exportName = ts.isIdentifier(name) ? ts.createLiteral(name.text) : name;
-            return ts.createCall(exportFunctionForFile, /*typeArguments*/ undefined, [exportName, value]);
+        function onSubstituteNode(hint, node) {
+            node = previousOnSubstituteNode(hint, node);
+            if (isSubstitutionPrevented(node)) {
+                return node;
+            }
+            if (hint === 1 /* Expression */) {
+                return substituteExpression(node);
+            }
+            return node;
         }
         /**
-         * Creates a call to the current file's export function to export a value.
-         * @param name The bound name of the export.
-         * @param value The exported value.
+         * Substitute the expression, if necessary.
+         *
+         * @param node The node to substitute.
          */
-        function createExportStatement(name, value) {
-            return ts.createStatement(createExportExpression(name, value));
+        function substituteExpression(node) {
+            switch (node.kind) {
+                case 71 /* Identifier */:
+                    return substituteExpressionIdentifier(node);
+                case 194 /* BinaryExpression */:
+                    return substituteBinaryExpression(node);
+                case 192 /* PrefixUnaryExpression */:
+                case 193 /* PostfixUnaryExpression */:
+                    return substituteUnaryExpression(node);
+            }
+            return node;
         }
         /**
-         * Creates a call to the current file's export function to export a declaration.
-         * @param node The declaration to export.
+         * Substitution for an Identifier expression that may contain an imported or exported symbol.
+         *
+         * @param node The node to substitute.
          */
-        function createDeclarationExport(node) {
-            var declarationName = getDeclarationName(node);
-            var exportName = ts.hasModifier(node, 512 /* Default */) ? ts.createLiteral("default") : declarationName;
-            return createExportStatement(exportName, declarationName);
-        }
-        function createImportBinding(importDeclaration) {
-            var importAlias;
-            var name;
-            if (ts.isImportClause(importDeclaration)) {
-                importAlias = ts.getGeneratedNameForNode(importDeclaration.parent);
-                name = ts.createIdentifier("default");
-            }
-            else if (ts.isImportSpecifier(importDeclaration)) {
-                importAlias = ts.getGeneratedNameForNode(importDeclaration.parent.parent.parent);
-                name = importDeclaration.propertyName || importDeclaration.name;
-            }
-            else {
-                return undefined;
-            }
-            if (name.originalKeywordKind && languageVersion === 0 /* ES3 */) {
-                return ts.createElementAccess(importAlias, ts.createLiteral(name.text));
-            }
-            else {
-                return ts.createPropertyAccess(importAlias, ts.getSynthesizedClone(name));
-            }
-        }
-        function collectDependencyGroups(externalImports) {
-            var groupIndices = ts.createMap();
-            var dependencyGroups = [];
-            for (var i = 0; i < externalImports.length; i++) {
-                var externalImport = externalImports[i];
-                var externalModuleName = ts.getExternalModuleNameLiteral(externalImport, currentSourceFile, host, resolver, compilerOptions);
-                var text = externalModuleName.text;
-                if (ts.hasProperty(groupIndices, text)) {
-                    // deduplicate/group entries in dependency list by the dependency name
-                    var groupIndex = groupIndices[text];
-                    dependencyGroups[groupIndex].externalImports.push(externalImport);
-                    continue;
+        function substituteExpressionIdentifier(node) {
+            if (ts.getEmitFlags(node) & 4096 /* HelperName */) {
+                var externalHelpersModuleName = ts.getExternalHelpersModuleName(currentSourceFile);
+                if (externalHelpersModuleName) {
+                    return ts.createPropertyAccess(externalHelpersModuleName, node);
                 }
-                else {
-                    groupIndices[text] = dependencyGroups.length;
-                    dependencyGroups.push({
-                        name: externalModuleName,
-                        externalImports: [externalImport]
-                    });
+                return node;
+            }
+            // When we see an identifier in an expression position that
+            // points to an imported symbol, we should substitute a qualified
+            // reference to the imported symbol if one is needed.
+            //
+            // - We do not substitute generated identifiers for any reason.
+            // - We do not substitute identifiers tagged with the LocalName flag.
+            if (!ts.isGeneratedIdentifier(node) && !ts.isLocalName(node)) {
+                var importDeclaration = resolver.getReferencedImportDeclaration(node);
+                if (importDeclaration) {
+                    if (ts.isImportClause(importDeclaration)) {
+                        return ts.setTextRange(ts.createPropertyAccess(ts.getGeneratedNameForNode(importDeclaration.parent), ts.createIdentifier("default")), 
+                        /*location*/ node);
+                    }
+                    else if (ts.isImportSpecifier(importDeclaration)) {
+                        return ts.setTextRange(ts.createPropertyAccess(ts.getGeneratedNameForNode(importDeclaration.parent.parent.parent), ts.getSynthesizedClone(importDeclaration.propertyName || importDeclaration.name)), 
+                        /*location*/ node);
+                    }
                 }
             }
-            return dependencyGroups;
-        }
-        function getNameOfDependencyGroup(dependencyGroup) {
-            return dependencyGroup.name;
+            return node;
         }
-        function recordExportName(name) {
-            if (!exportedLocalNames) {
-                exportedLocalNames = [];
+        /**
+         * Substitution for a BinaryExpression that may contain an imported or exported symbol.
+         *
+         * @param node The node to substitute.
+         */
+        function substituteBinaryExpression(node) {
+            // When we see an assignment expression whose left-hand side is an exported symbol,
+            // we should ensure all exports of that symbol are updated with the correct value.
+            //
+            // - We do not substitute generated identifiers for any reason.
+            // - We do not substitute identifiers tagged with the LocalName flag.
+            // - We do not substitute identifiers that were originally the name of an enum or
+            //   namespace due to how they are transformed in TypeScript.
+            // - We only substitute identifiers that are exported at the top level.
+            if (ts.isAssignmentOperator(node.operatorToken.kind)
+                && ts.isIdentifier(node.left)
+                && !ts.isGeneratedIdentifier(node.left)
+                && !ts.isLocalName(node.left)
+                && !ts.isDeclarationNameOfEnumOrNamespace(node.left)) {
+                var exportedNames = getExports(node.left);
+                if (exportedNames) {
+                    // For each additional export of the declaration, apply an export assignment.
+                    var expression = node;
+                    for (var _i = 0, exportedNames_3 = exportedNames; _i < exportedNames_3.length; _i++) {
+                        var exportName = exportedNames_3[_i];
+                        expression = createExportExpression(exportName, preventSubstitution(expression));
+                    }
+                    return expression;
+                }
             }
-            exportedLocalNames.push(name);
+            return node;
         }
-        function recordExportedFunctionDeclaration(node) {
-            if (!exportedFunctionDeclarations) {
-                exportedFunctionDeclarations = [];
+        /**
+         * Substitution for a UnaryExpression that may contain an imported or exported symbol.
+         *
+         * @param node The node to substitute.
+         */
+        function substituteUnaryExpression(node) {
+            // When we see a prefix or postfix increment expression whose operand is an exported
+            // symbol, we should ensure all exports of that symbol are updated with the correct
+            // value.
+            //
+            // - We do not substitute generated identifiers for any reason.
+            // - We do not substitute identifiers tagged with the LocalName flag.
+            // - We do not substitute identifiers that were originally the name of an enum or
+            //   namespace due to how they are transformed in TypeScript.
+            // - We only substitute identifiers that are exported at the top level.
+            if ((node.operator === 43 /* PlusPlusToken */ || node.operator === 44 /* MinusMinusToken */)
+                && ts.isIdentifier(node.operand)
+                && !ts.isGeneratedIdentifier(node.operand)
+                && !ts.isLocalName(node.operand)
+                && !ts.isDeclarationNameOfEnumOrNamespace(node.operand)) {
+                var exportedNames = getExports(node.operand);
+                if (exportedNames) {
+                    var expression = node.kind === 193 /* PostfixUnaryExpression */
+                        ? ts.setTextRange(ts.createPrefix(node.operator, node.operand), node)
+                        : node;
+                    for (var _i = 0, exportedNames_4 = exportedNames; _i < exportedNames_4.length; _i++) {
+                        var exportName = exportedNames_4[_i];
+                        expression = createExportExpression(exportName, preventSubstitution(expression));
+                    }
+                    if (node.kind === 193 /* PostfixUnaryExpression */) {
+                        expression = node.operator === 43 /* PlusPlusToken */
+                            ? ts.createSubtract(preventSubstitution(expression), ts.createLiteral(1))
+                            : ts.createAdd(preventSubstitution(expression), ts.createLiteral(1));
+                    }
+                    return expression;
+                }
             }
-            exportedFunctionDeclarations.push(createDeclarationExport(node));
+            return node;
         }
-        function hoistBindingElement(node, isExported) {
-            if (ts.isOmittedExpression(node)) {
-                return;
-            }
-            var name = node.name;
-            if (ts.isIdentifier(name)) {
-                hoistVariableDeclaration(ts.getSynthesizedClone(name));
-                if (isExported) {
-                    recordExportName(name);
+        /**
+         * Gets the exports of a name.
+         *
+         * @param name The name.
+         */
+        function getExports(name) {
+            var exportedNames;
+            if (!ts.isGeneratedIdentifier(name)) {
+                var valueDeclaration = resolver.getReferencedImportDeclaration(name)
+                    || resolver.getReferencedValueDeclaration(name);
+                if (valueDeclaration) {
+                    var exportContainer = resolver.getReferencedExportContainer(name, /*prefixLocals*/ false);
+                    if (exportContainer && exportContainer.kind === 265 /* SourceFile */) {
+                        exportedNames = ts.append(exportedNames, ts.getDeclarationName(valueDeclaration));
+                    }
+                    exportedNames = ts.addRange(exportedNames, moduleInfo && moduleInfo.exportedBindings[ts.getOriginalNodeId(valueDeclaration)]);
                 }
             }
-            else if (ts.isBindingPattern(name)) {
-                ts.forEach(name.elements, isExported ? hoistExportedBindingElement : hoistNonExportedBindingElement);
-            }
-        }
-        function hoistExportedBindingElement(node) {
-            hoistBindingElement(node, /*isExported*/ true);
+            return exportedNames;
         }
-        function hoistNonExportedBindingElement(node) {
-            hoistBindingElement(node, /*isExported*/ false);
+        /**
+         * Prevent substitution of a node for this transformer.
+         *
+         * @param node The node which should not be substituted.
+         */
+        function preventSubstitution(node) {
+            if (noSubstitution === undefined)
+                noSubstitution = [];
+            noSubstitution[ts.getNodeId(node)] = true;
+            return node;
         }
-        function updateSourceFile(node, statements, nodeEmitFlags) {
-            var updated = ts.getMutableClone(node);
-            updated.statements = ts.createNodeArray(statements, node.statements);
-            ts.setEmitFlags(updated, nodeEmitFlags);
-            return updated;
+        /**
+         * Determines whether a node should not be substituted.
+         *
+         * @param node The node to test.
+         */
+        function isSubstitutionPrevented(node) {
+            return noSubstitution && node.id && noSubstitution[node.id];
         }
     }
     ts.transformSystemModule = transformSystemModule;
@@ -55524,167 +67016,168 @@ var ts;
 /*@internal*/
 var ts;
 (function (ts) {
-    function transformES6Module(context) {
+    function transformES2015Module(context) {
         var compilerOptions = context.getCompilerOptions();
-        var resolver = context.getEmitResolver();
+        var previousOnEmitNode = context.onEmitNode;
+        var previousOnSubstituteNode = context.onSubstituteNode;
+        context.onEmitNode = onEmitNode;
+        context.onSubstituteNode = onSubstituteNode;
+        context.enableEmitNotification(265 /* SourceFile */);
+        context.enableSubstitution(71 /* Identifier */);
         var currentSourceFile;
         return transformSourceFile;
         function transformSourceFile(node) {
-            if (ts.isDeclarationFile(node)) {
+            if (node.isDeclarationFile) {
                 return node;
             }
             if (ts.isExternalModule(node) || compilerOptions.isolatedModules) {
-                currentSourceFile = node;
-                return ts.visitEachChild(node, visitor, context);
+                var externalHelpersModuleName = ts.getOrCreateExternalHelpersModuleNameIfNeeded(node, compilerOptions);
+                if (externalHelpersModuleName) {
+                    var statements = [];
+                    var statementOffset = ts.addPrologue(statements, node.statements);
+                    ts.append(statements, ts.createImportDeclaration(
+                    /*decorators*/ undefined, 
+                    /*modifiers*/ undefined, ts.createImportClause(/*name*/ undefined, ts.createNamespaceImport(externalHelpersModuleName)), ts.createLiteral(ts.externalHelpersModuleNameText)));
+                    ts.addRange(statements, ts.visitNodes(node.statements, visitor, ts.isStatement, statementOffset));
+                    return ts.updateSourceFileNode(node, ts.setTextRange(ts.createNodeArray(statements), node.statements));
+                }
+                else {
+                    return ts.visitEachChild(node, visitor, context);
+                }
             }
             return node;
         }
         function visitor(node) {
             switch (node.kind) {
-                case 230 /* ImportDeclaration */:
-                    return visitImportDeclaration(node);
-                case 229 /* ImportEqualsDeclaration */:
-                    return visitImportEqualsDeclaration(node);
-                case 231 /* ImportClause */:
-                    return visitImportClause(node);
-                case 233 /* NamedImports */:
-                case 232 /* NamespaceImport */:
-                    return visitNamedBindings(node);
-                case 234 /* ImportSpecifier */:
-                    return visitImportSpecifier(node);
-                case 235 /* ExportAssignment */:
+                case 237 /* ImportEqualsDeclaration */:
+                    // Elide `import=` as it is not legal with --module ES6
+                    return undefined;
+                case 243 /* ExportAssignment */:
                     return visitExportAssignment(node);
-                case 236 /* ExportDeclaration */:
-                    return visitExportDeclaration(node);
-                case 237 /* NamedExports */:
-                    return visitNamedExports(node);
-                case 238 /* ExportSpecifier */:
-                    return visitExportSpecifier(node);
             }
             return node;
         }
         function visitExportAssignment(node) {
-            if (node.isExportEquals) {
-                return undefined; // do not emit export equals for ES6
-            }
-            var original = ts.getOriginalNode(node);
-            return ts.nodeIsSynthesized(original) || resolver.isValueAliasDeclaration(original) ? node : undefined;
+            // Elide `export=` as it is not legal with --module ES6
+            return node.isExportEquals ? undefined : node;
         }
-        function visitExportDeclaration(node) {
-            if (!node.exportClause) {
-                return resolver.moduleExportsSomeValue(node.moduleSpecifier) ? node : undefined;
-            }
-            if (!resolver.isValueAliasDeclaration(node)) {
-                return undefined;
-            }
-            var newExportClause = ts.visitNode(node.exportClause, visitor, ts.isNamedExports, /*optional*/ true);
-            if (node.exportClause === newExportClause) {
-                return node;
+        //
+        // Emit Notification
+        //
+        /**
+         * Hook for node emit.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to emit.
+         * @param emit A callback used to emit the node in the printer.
+         */
+        function onEmitNode(hint, node, emitCallback) {
+            if (ts.isSourceFile(node)) {
+                currentSourceFile = node;
+                previousOnEmitNode(hint, node, emitCallback);
+                currentSourceFile = undefined;
             }
-            return newExportClause
-                ? ts.createExportDeclaration(
-                /*decorators*/ undefined, 
-                /*modifiers*/ undefined, newExportClause, node.moduleSpecifier)
-                : undefined;
-        }
-        function visitNamedExports(node) {
-            var newExports = ts.visitNodes(node.elements, visitor, ts.isExportSpecifier);
-            if (node.elements === newExports) {
-                return node;
+            else {
+                previousOnEmitNode(hint, node, emitCallback);
             }
-            return newExports.length ? ts.createNamedExports(newExports) : undefined;
-        }
-        function visitExportSpecifier(node) {
-            return resolver.isValueAliasDeclaration(node) ? node : undefined;
-        }
-        function visitImportEqualsDeclaration(node) {
-            return !ts.isExternalModuleImportEqualsDeclaration(node) || resolver.isReferencedAliasDeclaration(node) ? node : undefined;
         }
-        function visitImportDeclaration(node) {
-            if (node.importClause) {
-                var newImportClause = ts.visitNode(node.importClause, visitor, ts.isImportClause);
-                if (!newImportClause.name && !newImportClause.namedBindings) {
-                    return undefined;
-                }
-                else if (newImportClause !== node.importClause) {
-                    return ts.createImportDeclaration(
-                    /*decorators*/ undefined, 
-                    /*modifiers*/ undefined, newImportClause, node.moduleSpecifier);
-                }
+        //
+        // Substitutions
+        //
+        /**
+         * Hooks node substitutions.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to substitute.
+         */
+        function onSubstituteNode(hint, node) {
+            node = previousOnSubstituteNode(hint, node);
+            if (ts.isIdentifier(node) && hint === 1 /* Expression */) {
+                return substituteExpressionIdentifier(node);
             }
             return node;
         }
-        function visitImportClause(node) {
-            var newDefaultImport = node.name;
-            if (!resolver.isReferencedAliasDeclaration(node)) {
-                newDefaultImport = undefined;
-            }
-            var newNamedBindings = ts.visitNode(node.namedBindings, visitor, ts.isNamedImportBindings, /*optional*/ true);
-            return newDefaultImport !== node.name || newNamedBindings !== node.namedBindings
-                ? ts.createImportClause(newDefaultImport, newNamedBindings)
-                : node;
-        }
-        function visitNamedBindings(node) {
-            if (node.kind === 232 /* NamespaceImport */) {
-                return resolver.isReferencedAliasDeclaration(node) ? node : undefined;
-            }
-            else {
-                var newNamedImportElements = ts.visitNodes(node.elements, visitor, ts.isImportSpecifier);
-                if (!newNamedImportElements || newNamedImportElements.length == 0) {
-                    return undefined;
-                }
-                if (newNamedImportElements === node.elements) {
-                    return node;
+        function substituteExpressionIdentifier(node) {
+            if (ts.getEmitFlags(node) & 4096 /* HelperName */) {
+                var externalHelpersModuleName = ts.getExternalHelpersModuleName(currentSourceFile);
+                if (externalHelpersModuleName) {
+                    return ts.createPropertyAccess(externalHelpersModuleName, node);
                 }
-                return ts.createNamedImports(newNamedImportElements);
             }
-        }
-        function visitImportSpecifier(node) {
-            return resolver.isReferencedAliasDeclaration(node) ? node : undefined;
+            return node;
         }
     }
-    ts.transformES6Module = transformES6Module;
+    ts.transformES2015Module = transformES2015Module;
 })(ts || (ts = {}));
 /// <reference path="visitor.ts" />
+/// <reference path="transformers/utilities.ts" />
 /// <reference path="transformers/ts.ts" />
 /// <reference path="transformers/jsx.ts" />
-/// <reference path="transformers/es7.ts" />
-/// <reference path="transformers/es6.ts" />
+/// <reference path="transformers/esnext.ts" />
+/// <reference path="transformers/es2017.ts" />
+/// <reference path="transformers/es2016.ts" />
+/// <reference path="transformers/es2015.ts" />
 /// <reference path="transformers/generators.ts" />
+/// <reference path="transformers/es5.ts" />
 /// <reference path="transformers/module/module.ts" />
 /// <reference path="transformers/module/system.ts" />
-/// <reference path="transformers/module/es6.ts" />
+/// <reference path="transformers/module/es2015.ts" />
 /* @internal */
 var ts;
 (function (ts) {
-    var moduleTransformerMap = ts.createMap((_a = {},
-        _a[ts.ModuleKind.ES6] = ts.transformES6Module,
-        _a[ts.ModuleKind.System] = ts.transformSystemModule,
-        _a[ts.ModuleKind.AMD] = ts.transformModule,
-        _a[ts.ModuleKind.CommonJS] = ts.transformModule,
-        _a[ts.ModuleKind.UMD] = ts.transformModule,
-        _a[ts.ModuleKind.None] = ts.transformModule,
-        _a));
+    function getModuleTransformer(moduleKind) {
+        switch (moduleKind) {
+            case ts.ModuleKind.ESNext:
+            case ts.ModuleKind.ES2015:
+                return ts.transformES2015Module;
+            case ts.ModuleKind.System:
+                return ts.transformSystemModule;
+            default:
+                return ts.transformModule;
+        }
+    }
+    var TransformationState;
+    (function (TransformationState) {
+        TransformationState[TransformationState["Uninitialized"] = 0] = "Uninitialized";
+        TransformationState[TransformationState["Initialized"] = 1] = "Initialized";
+        TransformationState[TransformationState["Completed"] = 2] = "Completed";
+        TransformationState[TransformationState["Disposed"] = 3] = "Disposed";
+    })(TransformationState || (TransformationState = {}));
     var SyntaxKindFeatureFlags;
     (function (SyntaxKindFeatureFlags) {
         SyntaxKindFeatureFlags[SyntaxKindFeatureFlags["Substitution"] = 1] = "Substitution";
         SyntaxKindFeatureFlags[SyntaxKindFeatureFlags["EmitNotifications"] = 2] = "EmitNotifications";
     })(SyntaxKindFeatureFlags || (SyntaxKindFeatureFlags = {}));
-    function getTransformers(compilerOptions) {
+    function getTransformers(compilerOptions, customTransformers) {
         var jsx = compilerOptions.jsx;
         var languageVersion = ts.getEmitScriptTarget(compilerOptions);
         var moduleKind = ts.getEmitModuleKind(compilerOptions);
         var transformers = [];
+        ts.addRange(transformers, customTransformers && customTransformers.before);
         transformers.push(ts.transformTypeScript);
-        transformers.push(moduleTransformerMap[moduleKind] || moduleTransformerMap[ts.ModuleKind.None]);
         if (jsx === 2 /* React */) {
             transformers.push(ts.transformJsx);
         }
-        transformers.push(ts.transformES7);
-        if (languageVersion < 2 /* ES6 */) {
-            transformers.push(ts.transformES6);
+        if (languageVersion < 5 /* ESNext */) {
+            transformers.push(ts.transformESNext);
+        }
+        if (languageVersion < 4 /* ES2017 */) {
+            transformers.push(ts.transformES2017);
+        }
+        if (languageVersion < 3 /* ES2016 */) {
+            transformers.push(ts.transformES2016);
+        }
+        if (languageVersion < 2 /* ES2015 */) {
+            transformers.push(ts.transformES2015);
             transformers.push(ts.transformGenerators);
         }
+        transformers.push(getModuleTransformer(moduleKind));
+        // The ES5 transformer is last so that it can substitute expressions like `exports.default`
+        // for ES3.
+        if (languageVersion < 1 /* ES5 */) {
+            transformers.push(ts.transformES5);
+        }
+        ts.addRange(transformers, customTransformers && customTransformers.after);
         return transformers;
     }
     ts.getTransformers = getTransformers;
@@ -55692,61 +67185,85 @@ var ts;
      * Transforms an array of SourceFiles by passing them through each transformer.
      *
      * @param resolver The emit resolver provided by the checker.
-     * @param host The emit host.
-     * @param sourceFiles An array of source files
-     * @param transforms An array of Transformers.
+     * @param host The emit host object used to interact with the file system.
+     * @param options Compiler options to surface in the `TransformationContext`.
+     * @param nodes An array of nodes to transform.
+     * @param transforms An array of `TransformerFactory` callbacks.
+     * @param allowDtsFiles A value indicating whether to allow the transformation of .d.ts files.
      */
-    function transformFiles(resolver, host, sourceFiles, transformers) {
+    function transformNodes(resolver, host, options, nodes, transformers, allowDtsFiles) {
+        var enabledSyntaxKindFeatures = new Array(301 /* Count */);
+        var lexicalEnvironmentVariableDeclarations;
+        var lexicalEnvironmentFunctionDeclarations;
         var lexicalEnvironmentVariableDeclarationsStack = [];
         var lexicalEnvironmentFunctionDeclarationsStack = [];
-        var enabledSyntaxKindFeatures = new Array(289 /* Count */);
         var lexicalEnvironmentStackOffset = 0;
-        var hoistedVariableDeclarations;
-        var hoistedFunctionDeclarations;
-        var lexicalEnvironmentDisabled;
+        var lexicalEnvironmentSuspended = false;
+        var emitHelpers;
+        var onSubstituteNode = function (_, node) { return node; };
+        var onEmitNode = function (hint, node, callback) { return callback(hint, node); };
+        var state = 0 /* Uninitialized */;
         // The transformation context is provided to each transformer as part of transformer
         // initialization.
         var context = {
-            getCompilerOptions: function () { return host.getCompilerOptions(); },
+            getCompilerOptions: function () { return options; },
             getEmitResolver: function () { return resolver; },
             getEmitHost: function () { return host; },
-            hoistVariableDeclaration: hoistVariableDeclaration,
-            hoistFunctionDeclaration: hoistFunctionDeclaration,
             startLexicalEnvironment: startLexicalEnvironment,
+            suspendLexicalEnvironment: suspendLexicalEnvironment,
+            resumeLexicalEnvironment: resumeLexicalEnvironment,
             endLexicalEnvironment: endLexicalEnvironment,
-            onSubstituteNode: function (emitContext, node) { return node; },
+            hoistVariableDeclaration: hoistVariableDeclaration,
+            hoistFunctionDeclaration: hoistFunctionDeclaration,
+            requestEmitHelper: requestEmitHelper,
+            readEmitHelpers: readEmitHelpers,
             enableSubstitution: enableSubstitution,
-            isSubstitutionEnabled: isSubstitutionEnabled,
-            onEmitNode: function (node, emitContext, emitCallback) { return emitCallback(node, emitContext); },
             enableEmitNotification: enableEmitNotification,
-            isEmitNotificationEnabled: isEmitNotificationEnabled
+            isSubstitutionEnabled: isSubstitutionEnabled,
+            isEmitNotificationEnabled: isEmitNotificationEnabled,
+            get onSubstituteNode() { return onSubstituteNode; },
+            set onSubstituteNode(value) {
+                ts.Debug.assert(state < 1 /* Initialized */, "Cannot modify transformation hooks after initialization has completed.");
+                ts.Debug.assert(value !== undefined, "Value must not be 'undefined'");
+                onSubstituteNode = value;
+            },
+            get onEmitNode() { return onEmitNode; },
+            set onEmitNode(value) {
+                ts.Debug.assert(state < 1 /* Initialized */, "Cannot modify transformation hooks after initialization has completed.");
+                ts.Debug.assert(value !== undefined, "Value must not be 'undefined'");
+                onEmitNode = value;
+            }
         };
+        // Ensure the parse tree is clean before applying transformations
+        for (var _i = 0, nodes_6 = nodes; _i < nodes_6.length; _i++) {
+            var node = nodes_6[_i];
+            ts.disposeEmitNodes(ts.getSourceFileOfNode(ts.getParseTreeNode(node)));
+        }
+        ts.performance.mark("beforeTransform");
         // Chain together and initialize each transformer.
         var transformation = ts.chain.apply(void 0, transformers)(context);
-        // Transform each source file.
-        var transformed = ts.map(sourceFiles, transformSourceFile);
-        // Disable modification of the lexical environment.
-        lexicalEnvironmentDisabled = true;
+        // prevent modification of transformation hooks.
+        state = 1 /* Initialized */;
+        // Transform each node.
+        var transformed = ts.map(nodes, allowDtsFiles ? transformation : transformRoot);
+        // prevent modification of the lexical environment.
+        state = 2 /* Completed */;
+        ts.performance.mark("afterTransform");
+        ts.performance.measure("transformTime", "beforeTransform", "afterTransform");
         return {
             transformed: transformed,
-            emitNodeWithSubstitution: emitNodeWithSubstitution,
-            emitNodeWithNotification: emitNodeWithNotification
+            substituteNode: substituteNode,
+            emitNodeWithNotification: emitNodeWithNotification,
+            dispose: dispose
         };
-        /**
-         * Transforms a source file.
-         *
-         * @param sourceFile The source file to transform.
-         */
-        function transformSourceFile(sourceFile) {
-            if (ts.isDeclarationFile(sourceFile)) {
-                return sourceFile;
-            }
-            return transformation(sourceFile);
+        function transformRoot(node) {
+            return node && (!ts.isSourceFile(node) || !node.isDeclarationFile) ? transformation(node) : node;
         }
         /**
          * Enables expression substitutions in the pretty printer for the provided SyntaxKind.
          */
         function enableSubstitution(kind) {
+            ts.Debug.assert(state < 2 /* Completed */, "Cannot modify the transformation context after transformation has completed.");
             enabledSyntaxKindFeatures[kind] |= 1 /* Substitution */;
         }
         /**
@@ -55754,31 +67271,24 @@ var ts;
          */
         function isSubstitutionEnabled(node) {
             return (enabledSyntaxKindFeatures[node.kind] & 1 /* Substitution */) !== 0
-                && (ts.getEmitFlags(node) & 128 /* NoSubstitution */) === 0;
+                && (ts.getEmitFlags(node) & 4 /* NoSubstitution */) === 0;
         }
         /**
          * Emits a node with possible substitution.
          *
-         * @param emitContext The current emit context.
+         * @param hint A hint as to the intended usage of the node.
          * @param node The node to emit.
          * @param emitCallback The callback used to emit the node or its substitute.
          */
-        function emitNodeWithSubstitution(emitContext, node, emitCallback) {
-            if (node) {
-                if (isSubstitutionEnabled(node)) {
-                    var substitute = context.onSubstituteNode(emitContext, node);
-                    if (substitute && substitute !== node) {
-                        emitCallback(emitContext, substitute);
-                        return;
-                    }
-                }
-                emitCallback(emitContext, node);
-            }
+        function substituteNode(hint, node) {
+            ts.Debug.assert(state < 3 /* Disposed */, "Cannot substitute a node after the result is disposed.");
+            return node && isSubstitutionEnabled(node) && onSubstituteNode(hint, node) || node;
         }
         /**
          * Enables before/after emit notifications in the pretty printer for the provided SyntaxKind.
          */
         function enableEmitNotification(kind) {
+            ts.Debug.assert(state < 2 /* Completed */, "Cannot modify the transformation context after transformation has completed.");
             enabledSyntaxKindFeatures[kind] |= 2 /* EmitNotifications */;
         }
         /**
@@ -55787,22 +67297,23 @@ var ts;
          */
         function isEmitNotificationEnabled(node) {
             return (enabledSyntaxKindFeatures[node.kind] & 2 /* EmitNotifications */) !== 0
-                || (ts.getEmitFlags(node) & 64 /* AdviseOnEmitNode */) !== 0;
+                || (ts.getEmitFlags(node) & 2 /* AdviseOnEmitNode */) !== 0;
         }
         /**
          * Emits a node with possible emit notification.
          *
-         * @param emitContext The current emit context.
+         * @param hint A hint as to the intended usage of the node.
          * @param node The node to emit.
          * @param emitCallback The callback used to emit the node.
          */
-        function emitNodeWithNotification(emitContext, node, emitCallback) {
+        function emitNodeWithNotification(hint, node, emitCallback) {
+            ts.Debug.assert(state < 3 /* Disposed */, "Cannot invoke TransformationResult callbacks after the result is disposed.");
             if (node) {
                 if (isEmitNotificationEnabled(node)) {
-                    context.onEmitNode(emitContext, node, emitCallback);
+                    onEmitNode(hint, node, emitCallback);
                 }
                 else {
-                    emitCallback(emitContext, node);
+                    emitCallback(hint, node);
                 }
             }
         }
@@ -55810,25 +67321,27 @@ var ts;
          * Records a hoisted variable declaration for the provided name within a lexical environment.
          */
         function hoistVariableDeclaration(name) {
-            ts.Debug.assert(!lexicalEnvironmentDisabled, "Cannot modify the lexical environment during the print phase.");
-            var decl = ts.createVariableDeclaration(name);
-            if (!hoistedVariableDeclarations) {
-                hoistedVariableDeclarations = [decl];
+            ts.Debug.assert(state > 0 /* Uninitialized */, "Cannot modify the lexical environment during initialization.");
+            ts.Debug.assert(state < 2 /* Completed */, "Cannot modify the lexical environment after transformation has completed.");
+            var decl = ts.setEmitFlags(ts.createVariableDeclaration(name), 64 /* NoNestedSourceMaps */);
+            if (!lexicalEnvironmentVariableDeclarations) {
+                lexicalEnvironmentVariableDeclarations = [decl];
             }
             else {
-                hoistedVariableDeclarations.push(decl);
+                lexicalEnvironmentVariableDeclarations.push(decl);
             }
         }
         /**
          * Records a hoisted function declaration within a lexical environment.
          */
         function hoistFunctionDeclaration(func) {
-            ts.Debug.assert(!lexicalEnvironmentDisabled, "Cannot modify the lexical environment during the print phase.");
-            if (!hoistedFunctionDeclarations) {
-                hoistedFunctionDeclarations = [func];
+            ts.Debug.assert(state > 0 /* Uninitialized */, "Cannot modify the lexical environment during initialization.");
+            ts.Debug.assert(state < 2 /* Completed */, "Cannot modify the lexical environment after transformation has completed.");
+            if (!lexicalEnvironmentFunctionDeclarations) {
+                lexicalEnvironmentFunctionDeclarations = [func];
             }
             else {
-                hoistedFunctionDeclarations.push(func);
+                lexicalEnvironmentFunctionDeclarations.push(func);
             }
         }
         /**
@@ -55836,31 +67349,49 @@ var ts;
          * are pushed onto a stack, and the related storage variables are reset.
          */
         function startLexicalEnvironment() {
-            ts.Debug.assert(!lexicalEnvironmentDisabled, "Cannot start a lexical environment during the print phase.");
+            ts.Debug.assert(state > 0 /* Uninitialized */, "Cannot modify the lexical environment during initialization.");
+            ts.Debug.assert(state < 2 /* Completed */, "Cannot modify the lexical environment after transformation has completed.");
+            ts.Debug.assert(!lexicalEnvironmentSuspended, "Lexical environment is suspended.");
             // Save the current lexical environment. Rather than resizing the array we adjust the
             // stack size variable. This allows us to reuse existing array slots we've
             // already allocated between transformations to avoid allocation and GC overhead during
             // transformation.
-            lexicalEnvironmentVariableDeclarationsStack[lexicalEnvironmentStackOffset] = hoistedVariableDeclarations;
-            lexicalEnvironmentFunctionDeclarationsStack[lexicalEnvironmentStackOffset] = hoistedFunctionDeclarations;
+            lexicalEnvironmentVariableDeclarationsStack[lexicalEnvironmentStackOffset] = lexicalEnvironmentVariableDeclarations;
+            lexicalEnvironmentFunctionDeclarationsStack[lexicalEnvironmentStackOffset] = lexicalEnvironmentFunctionDeclarations;
             lexicalEnvironmentStackOffset++;
-            hoistedVariableDeclarations = undefined;
-            hoistedFunctionDeclarations = undefined;
+            lexicalEnvironmentVariableDeclarations = undefined;
+            lexicalEnvironmentFunctionDeclarations = undefined;
+        }
+        /** Suspends the current lexical environment, usually after visiting a parameter list. */
+        function suspendLexicalEnvironment() {
+            ts.Debug.assert(state > 0 /* Uninitialized */, "Cannot modify the lexical environment during initialization.");
+            ts.Debug.assert(state < 2 /* Completed */, "Cannot modify the lexical environment after transformation has completed.");
+            ts.Debug.assert(!lexicalEnvironmentSuspended, "Lexical environment is already suspended.");
+            lexicalEnvironmentSuspended = true;
+        }
+        /** Resumes a suspended lexical environment, usually before visiting a function body. */
+        function resumeLexicalEnvironment() {
+            ts.Debug.assert(state > 0 /* Uninitialized */, "Cannot modify the lexical environment during initialization.");
+            ts.Debug.assert(state < 2 /* Completed */, "Cannot modify the lexical environment after transformation has completed.");
+            ts.Debug.assert(lexicalEnvironmentSuspended, "Lexical environment is not suspended.");
+            lexicalEnvironmentSuspended = false;
         }
         /**
          * Ends a lexical environment. The previous set of hoisted declarations are restored and
          * any hoisted declarations added in this environment are returned.
          */
         function endLexicalEnvironment() {
-            ts.Debug.assert(!lexicalEnvironmentDisabled, "Cannot end a lexical environment during the print phase.");
+            ts.Debug.assert(state > 0 /* Uninitialized */, "Cannot modify the lexical environment during initialization.");
+            ts.Debug.assert(state < 2 /* Completed */, "Cannot modify the lexical environment after transformation has completed.");
+            ts.Debug.assert(!lexicalEnvironmentSuspended, "Lexical environment is suspended.");
             var statements;
-            if (hoistedVariableDeclarations || hoistedFunctionDeclarations) {
-                if (hoistedFunctionDeclarations) {
-                    statements = hoistedFunctionDeclarations.slice();
+            if (lexicalEnvironmentVariableDeclarations || lexicalEnvironmentFunctionDeclarations) {
+                if (lexicalEnvironmentFunctionDeclarations) {
+                    statements = lexicalEnvironmentFunctionDeclarations.slice();
                 }
-                if (hoistedVariableDeclarations) {
+                if (lexicalEnvironmentVariableDeclarations) {
                     var statement = ts.createVariableStatement(
-                    /*modifiers*/ undefined, ts.createVariableDeclarationList(hoistedVariableDeclarations));
+                    /*modifiers*/ undefined, ts.createVariableDeclarationList(lexicalEnvironmentVariableDeclarations));
                     if (!statements) {
                         statements = [statement];
                     }
@@ -55871,13 +67402,48 @@ var ts;
             }
             // Restore the previous lexical environment.
             lexicalEnvironmentStackOffset--;
-            hoistedVariableDeclarations = lexicalEnvironmentVariableDeclarationsStack[lexicalEnvironmentStackOffset];
-            hoistedFunctionDeclarations = lexicalEnvironmentFunctionDeclarationsStack[lexicalEnvironmentStackOffset];
+            lexicalEnvironmentVariableDeclarations = lexicalEnvironmentVariableDeclarationsStack[lexicalEnvironmentStackOffset];
+            lexicalEnvironmentFunctionDeclarations = lexicalEnvironmentFunctionDeclarationsStack[lexicalEnvironmentStackOffset];
+            if (lexicalEnvironmentStackOffset === 0) {
+                lexicalEnvironmentVariableDeclarationsStack = [];
+                lexicalEnvironmentFunctionDeclarationsStack = [];
+            }
             return statements;
         }
-    }
-    ts.transformFiles = transformFiles;
-    var _a;
+        function requestEmitHelper(helper) {
+            ts.Debug.assert(state > 0 /* Uninitialized */, "Cannot modify the transformation context during initialization.");
+            ts.Debug.assert(state < 2 /* Completed */, "Cannot modify the transformation context after transformation has completed.");
+            ts.Debug.assert(!helper.scoped, "Cannot request a scoped emit helper.");
+            emitHelpers = ts.append(emitHelpers, helper);
+        }
+        function readEmitHelpers() {
+            ts.Debug.assert(state > 0 /* Uninitialized */, "Cannot modify the transformation context during initialization.");
+            ts.Debug.assert(state < 2 /* Completed */, "Cannot modify the transformation context after transformation has completed.");
+            var helpers = emitHelpers;
+            emitHelpers = undefined;
+            return helpers;
+        }
+        function dispose() {
+            if (state < 3 /* Disposed */) {
+                // Clean up emit nodes on parse tree
+                for (var _i = 0, nodes_7 = nodes; _i < nodes_7.length; _i++) {
+                    var node = nodes_7[_i];
+                    ts.disposeEmitNodes(ts.getSourceFileOfNode(ts.getParseTreeNode(node)));
+                }
+                // Release references to external entries for GC purposes.
+                lexicalEnvironmentVariableDeclarations = undefined;
+                lexicalEnvironmentVariableDeclarationsStack = undefined;
+                lexicalEnvironmentFunctionDeclarations = undefined;
+                lexicalEnvironmentFunctionDeclarationsStack = undefined;
+                onSubstituteNode = undefined;
+                onEmitNode = undefined;
+                emitHelpers = undefined;
+                // Prevent further use of the transformation result.
+                state = 3 /* Disposed */;
+            }
+        }
+    }
+    ts.transformNodes = transformNodes;
 })(ts || (ts = {}));
 /// <reference path="checker.ts"/>
 /* @internal */
@@ -55894,7 +67460,7 @@ var ts;
     function createSourceMapWriter(host, writer) {
         var compilerOptions = host.getCompilerOptions();
         var extendedDiagnostics = compilerOptions.extendedDiagnostics;
-        var currentSourceFile;
+        var currentSource;
         var currentSourceText;
         var sourceMapDir; // The directory in which sourcemap will be
         // Current source map file and its index in the sources list
@@ -55917,22 +67483,27 @@ var ts;
             getText: getText,
             getSourceMappingURL: getSourceMappingURL,
         };
+        /**
+         * Skips trivia such as comments and white-space that can optionally overriden by the source map source
+         */
+        function skipSourceTrivia(pos) {
+            return currentSource.skipTrivia ? currentSource.skipTrivia(pos) : ts.skipTrivia(currentSourceText, pos);
+        }
         /**
          * Initialize the SourceMapWriter for a new output file.
          *
          * @param filePath The path to the generated output file.
          * @param sourceMapFilePath The path to the output source map file.
-         * @param sourceFiles The input source files for the program.
-         * @param isBundledEmit A value indicating whether the generated output file is a bundle.
+         * @param sourceFileOrBundle The input source file or bundle for the program.
          */
-        function initialize(filePath, sourceMapFilePath, sourceFiles, isBundledEmit) {
+        function initialize(filePath, sourceMapFilePath, sourceFileOrBundle) {
             if (disabled) {
                 return;
             }
             if (sourceMapData) {
                 reset();
             }
-            currentSourceFile = undefined;
+            currentSource = undefined;
             currentSourceText = undefined;
             // Current source map file and its index in the sources list
             sourceMapSourceIndex = -1;
@@ -55961,11 +67532,10 @@ var ts;
             }
             if (compilerOptions.mapRoot) {
                 sourceMapDir = ts.normalizeSlashes(compilerOptions.mapRoot);
-                if (!isBundledEmit) {
-                    ts.Debug.assert(sourceFiles.length === 1);
+                if (sourceFileOrBundle.kind === 265 /* SourceFile */) {
                     // For modules or multiple emit files the mapRoot will have directory structure like the sources
                     // So if src\a.ts and src\lib\b.ts are compiled together user would be moving the maps into mapRoot\a.js.map and mapRoot\lib\b.js.map
-                    sourceMapDir = ts.getDirectoryPath(ts.getSourceFilePathInNewDir(sourceFiles[0], host, sourceMapDir));
+                    sourceMapDir = ts.getDirectoryPath(ts.getSourceFilePathInNewDir(sourceFileOrBundle, host, sourceMapDir));
                 }
                 if (!ts.isRootedDiskPath(sourceMapDir) && !ts.isUrl(sourceMapDir)) {
                     // The relative paths are relative to the common directory
@@ -55990,7 +67560,7 @@ var ts;
             if (disabled) {
                 return;
             }
-            currentSourceFile = undefined;
+            currentSource = undefined;
             sourceMapDir = undefined;
             sourceMapSourceIndex = undefined;
             lastRecordedSourceMapSpan = undefined;
@@ -56050,7 +67620,7 @@ var ts;
             if (extendedDiagnostics) {
                 ts.performance.mark("beforeSourcemap");
             }
-            var sourceLinePos = ts.getLineAndCharacterOfPosition(currentSourceFile, pos);
+            var sourceLinePos = ts.getLineAndCharacterOfPosition(currentSource, pos);
             // Convert the location to be one-based.
             sourceLinePos.line++;
             sourceLinePos.character++;
@@ -56088,35 +67658,49 @@ var ts;
         /**
          * Emits a node with possible leading and trailing source maps.
          *
+         * @param hint A hint as to the intended usage of the node.
          * @param node The node to emit.
          * @param emitCallback The callback used to emit the node.
          */
-        function emitNodeWithSourceMap(emitContext, node, emitCallback) {
+        function emitNodeWithSourceMap(hint, node, emitCallback) {
             if (disabled) {
-                return emitCallback(emitContext, node);
+                return emitCallback(hint, node);
             }
             if (node) {
                 var emitNode = node.emitNode;
                 var emitFlags = emitNode && emitNode.flags;
-                var _a = emitNode && emitNode.sourceMapRange || node, pos = _a.pos, end = _a.end;
-                if (node.kind !== 287 /* NotEmittedStatement */
-                    && (emitFlags & 512 /* NoLeadingSourceMap */) === 0
+                var range = emitNode && emitNode.sourceMapRange;
+                var _a = range || node, pos = _a.pos, end = _a.end;
+                var source = range && range.source;
+                var oldSource = currentSource;
+                if (source === oldSource)
+                    source = undefined;
+                if (source)
+                    setSourceFile(source);
+                if (node.kind !== 296 /* NotEmittedStatement */
+                    && (emitFlags & 16 /* NoLeadingSourceMap */) === 0
                     && pos >= 0) {
-                    emitPos(ts.skipTrivia(currentSourceText, pos));
+                    emitPos(skipSourceTrivia(pos));
                 }
-                if (emitFlags & 2048 /* NoNestedSourceMaps */) {
+                if (source)
+                    setSourceFile(oldSource);
+                if (emitFlags & 64 /* NoNestedSourceMaps */) {
                     disabled = true;
-                    emitCallback(emitContext, node);
+                    emitCallback(hint, node);
                     disabled = false;
                 }
                 else {
-                    emitCallback(emitContext, node);
+                    emitCallback(hint, node);
                 }
-                if (node.kind !== 287 /* NotEmittedStatement */
-                    && (emitFlags & 1024 /* NoTrailingSourceMap */) === 0
+                if (source)
+                    setSourceFile(source);
+                if (node.kind !== 296 /* NotEmittedStatement */
+                    && (emitFlags & 32 /* NoTrailingSourceMap */) === 0
                     && end >= 0) {
                     emitPos(end);
                 }
+                if (source)
+                    setSourceFile(oldSource);
             }
         }
         /**
@@ -56134,14 +67718,14 @@ var ts;
             var emitNode = node && node.emitNode;
             var emitFlags = emitNode && emitNode.flags;
             var range = emitNode && emitNode.tokenSourceMapRanges && emitNode.tokenSourceMapRanges[token];
-            tokenPos = ts.skipTrivia(currentSourceText, range ? range.pos : tokenPos);
-            if ((emitFlags & 4096 /* NoTokenLeadingSourceMaps */) === 0 && tokenPos >= 0) {
+            tokenPos = skipSourceTrivia(range ? range.pos : tokenPos);
+            if ((emitFlags & 128 /* NoTokenLeadingSourceMaps */) === 0 && tokenPos >= 0) {
                 emitPos(tokenPos);
             }
             tokenPos = emitCallback(token, tokenPos);
             if (range)
                 tokenPos = range.end;
-            if ((emitFlags & 8192 /* NoTokenTrailingSourceMaps */) === 0 && tokenPos >= 0) {
+            if ((emitFlags & 256 /* NoTokenTrailingSourceMaps */) === 0 && tokenPos >= 0) {
                 emitPos(tokenPos);
             }
             return tokenPos;
@@ -56155,22 +67739,22 @@ var ts;
             if (disabled) {
                 return;
             }
-            currentSourceFile = sourceFile;
-            currentSourceText = currentSourceFile.text;
+            currentSource = sourceFile;
+            currentSourceText = currentSource.text;
             // Add the file to tsFilePaths
             // If sourceroot option: Use the relative path corresponding to the common directory path
             // otherwise source locations relative to map file location
             var sourcesDirectoryPath = compilerOptions.sourceRoot ? host.getCommonSourceDirectory() : sourceMapDir;
-            var source = ts.getRelativePathToDirectoryOrUrl(sourcesDirectoryPath, currentSourceFile.fileName, host.getCurrentDirectory(), host.getCanonicalFileName, 
+            var source = ts.getRelativePathToDirectoryOrUrl(sourcesDirectoryPath, currentSource.fileName, host.getCurrentDirectory(), host.getCanonicalFileName, 
             /*isAbsolutePathAnUrl*/ true);
             sourceMapSourceIndex = ts.indexOf(sourceMapData.sourceMapSources, source);
             if (sourceMapSourceIndex === -1) {
                 sourceMapSourceIndex = sourceMapData.sourceMapSources.length;
                 sourceMapData.sourceMapSources.push(source);
                 // The one that can be used from program to get the actual source file
-                sourceMapData.inputSourceFileNames.push(currentSourceFile.fileName);
+                sourceMapData.inputSourceFileNames.push(currentSource.fileName);
                 if (compilerOptions.inlineSources) {
-                    sourceMapData.sourceMapSourcesContent.push(currentSourceFile.text);
+                    sourceMapData.sourceMapSourcesContent.push(currentSource.text);
                 }
             }
         }
@@ -56182,7 +67766,7 @@ var ts;
                 return;
             }
             encodeLastRecordedSourceMapSpan();
-            return ts.stringify({
+            return JSON.stringify({
                 version: 3,
                 file: sourceMapData.sourceMapFile,
                 sourceRoot: sourceMapData.sourceMapSourceRoot,
@@ -56247,11 +67831,10 @@ var ts;
 /* @internal */
 var ts;
 (function (ts) {
-    function createCommentWriter(host, writer, sourceMap) {
-        var compilerOptions = host.getCompilerOptions();
-        var extendedDiagnostics = compilerOptions.extendedDiagnostics;
-        var newLine = host.getNewLine();
-        var emitPos = sourceMap.emitPos;
+    function createCommentWriter(printerOptions, emitPos) {
+        var extendedDiagnostics = printerOptions.extendedDiagnostics;
+        var newLine = ts.getNewLineCharacter(printerOptions);
+        var writer;
         var containerPos = -1;
         var containerEnd = -1;
         var declarationListContainerEnd = -1;
@@ -56260,40 +67843,39 @@ var ts;
         var currentLineMap;
         var detachedCommentsInfo;
         var hasWrittenComment = false;
-        var disabled = compilerOptions.removeComments;
+        var disabled = printerOptions.removeComments;
         return {
             reset: reset,
+            setWriter: setWriter,
             setSourceFile: setSourceFile,
             emitNodeWithComments: emitNodeWithComments,
             emitBodyWithDetachedComments: emitBodyWithDetachedComments,
             emitTrailingCommentsOfPosition: emitTrailingCommentsOfPosition,
+            emitLeadingCommentsOfPosition: emitLeadingCommentsOfPosition,
         };
-        function emitNodeWithComments(emitContext, node, emitCallback) {
+        function emitNodeWithComments(hint, node, emitCallback) {
             if (disabled) {
-                emitCallback(emitContext, node);
+                emitCallback(hint, node);
                 return;
             }
             if (node) {
-                var _a = ts.getCommentRange(node), pos = _a.pos, end = _a.end;
-                var emitFlags = ts.getEmitFlags(node);
+                hasWrittenComment = false;
+                var emitNode = node.emitNode;
+                var emitFlags = emitNode && emitNode.flags;
+                var _a = emitNode && emitNode.commentRange || node, pos = _a.pos, end = _a.end;
                 if ((pos < 0 && end < 0) || (pos === end)) {
                     // Both pos and end are synthesized, so just emit the node without comments.
-                    if (emitFlags & 65536 /* NoNestedComments */) {
-                        disabled = true;
-                        emitCallback(emitContext, node);
-                        disabled = false;
-                    }
-                    else {
-                        emitCallback(emitContext, node);
-                    }
+                    emitNodeWithSynthesizedComments(hint, node, emitNode, emitFlags, emitCallback);
                 }
                 else {
                     if (extendedDiagnostics) {
                         ts.performance.mark("preEmitNodeWithComment");
                     }
-                    var isEmittedNode = node.kind !== 287 /* NotEmittedStatement */;
-                    var skipLeadingComments = pos < 0 || (emitFlags & 16384 /* NoLeadingComments */) !== 0;
-                    var skipTrailingComments = end < 0 || (emitFlags & 32768 /* NoTrailingComments */) !== 0;
+                    var isEmittedNode = node.kind !== 296 /* NotEmittedStatement */;
+                    // We have to explicitly check that the node is JsxText because if the compilerOptions.jsx is "preserve" we will not do any transformation.
+                    // It is expensive to walk entire tree just to set one kind of node to have no comments.
+                    var skipLeadingComments = pos < 0 || (emitFlags & 512 /* NoLeadingComments */) !== 0 || node.kind === 10 /* JsxText */;
+                    var skipTrailingComments = end < 0 || (emitFlags & 1024 /* NoTrailingComments */) !== 0 || node.kind === 10 /* JsxText */;
                     // Emit leading comments if the position is not synthesized and the node
                     // has not opted out from emitting leading comments.
                     if (!skipLeadingComments) {
@@ -56310,23 +67892,16 @@ var ts;
                         containerEnd = end;
                         // To avoid invalid comment emit in a down-level binding pattern, we
                         // keep track of the last declaration list container's end
-                        if (node.kind === 219 /* VariableDeclarationList */) {
+                        if (node.kind === 227 /* VariableDeclarationList */) {
                             declarationListContainerEnd = end;
                         }
                     }
                     if (extendedDiagnostics) {
                         ts.performance.measure("commentTime", "preEmitNodeWithComment");
                     }
-                    if (emitFlags & 65536 /* NoNestedComments */) {
-                        disabled = true;
-                        emitCallback(emitContext, node);
-                        disabled = false;
-                    }
-                    else {
-                        emitCallback(emitContext, node);
-                    }
+                    emitNodeWithSynthesizedComments(hint, node, emitNode, emitFlags, emitCallback);
                     if (extendedDiagnostics) {
-                        ts.performance.mark("beginEmitNodeWithComment");
+                        ts.performance.mark("postEmitNodeWithComment");
                     }
                     // Restore previous container state.
                     containerPos = savedContainerPos;
@@ -56338,26 +67913,90 @@ var ts;
                         emitTrailingComments(end);
                     }
                     if (extendedDiagnostics) {
-                        ts.performance.measure("commentTime", "beginEmitNodeWithComment");
+                        ts.performance.measure("commentTime", "postEmitNodeWithComment");
                     }
                 }
             }
         }
+        function emitNodeWithSynthesizedComments(hint, node, emitNode, emitFlags, emitCallback) {
+            var leadingComments = emitNode && emitNode.leadingComments;
+            if (ts.some(leadingComments)) {
+                if (extendedDiagnostics) {
+                    ts.performance.mark("preEmitNodeWithSynthesizedComments");
+                }
+                ts.forEach(leadingComments, emitLeadingSynthesizedComment);
+                if (extendedDiagnostics) {
+                    ts.performance.measure("commentTime", "preEmitNodeWithSynthesizedComments");
+                }
+            }
+            emitNodeWithNestedComments(hint, node, emitFlags, emitCallback);
+            var trailingComments = emitNode && emitNode.trailingComments;
+            if (ts.some(trailingComments)) {
+                if (extendedDiagnostics) {
+                    ts.performance.mark("postEmitNodeWithSynthesizedComments");
+                }
+                ts.forEach(trailingComments, emitTrailingSynthesizedComment);
+                if (extendedDiagnostics) {
+                    ts.performance.measure("commentTime", "postEmitNodeWithSynthesizedComments");
+                }
+            }
+        }
+        function emitLeadingSynthesizedComment(comment) {
+            if (comment.kind === 2 /* SingleLineCommentTrivia */) {
+                writer.writeLine();
+            }
+            writeSynthesizedComment(comment);
+            if (comment.hasTrailingNewLine || comment.kind === 2 /* SingleLineCommentTrivia */) {
+                writer.writeLine();
+            }
+            else {
+                writer.write(" ");
+            }
+        }
+        function emitTrailingSynthesizedComment(comment) {
+            if (!writer.isAtStartOfLine()) {
+                writer.write(" ");
+            }
+            writeSynthesizedComment(comment);
+            if (comment.hasTrailingNewLine) {
+                writer.writeLine();
+            }
+        }
+        function writeSynthesizedComment(comment) {
+            var text = formatSynthesizedComment(comment);
+            var lineMap = comment.kind === 3 /* MultiLineCommentTrivia */ ? ts.computeLineStarts(text) : undefined;
+            ts.writeCommentRange(text, lineMap, writer, 0, text.length, newLine);
+        }
+        function formatSynthesizedComment(comment) {
+            return comment.kind === 3 /* MultiLineCommentTrivia */
+                ? "/*" + comment.text + "*/"
+                : "//" + comment.text;
+        }
+        function emitNodeWithNestedComments(hint, node, emitFlags, emitCallback) {
+            if (emitFlags & 2048 /* NoNestedComments */) {
+                disabled = true;
+                emitCallback(hint, node);
+                disabled = false;
+            }
+            else {
+                emitCallback(hint, node);
+            }
+        }
         function emitBodyWithDetachedComments(node, detachedRange, emitCallback) {
             if (extendedDiagnostics) {
                 ts.performance.mark("preEmitBodyWithDetachedComments");
             }
             var pos = detachedRange.pos, end = detachedRange.end;
             var emitFlags = ts.getEmitFlags(node);
-            var skipLeadingComments = pos < 0 || (emitFlags & 16384 /* NoLeadingComments */) !== 0;
-            var skipTrailingComments = disabled || end < 0 || (emitFlags & 32768 /* NoTrailingComments */) !== 0;
+            var skipLeadingComments = pos < 0 || (emitFlags & 512 /* NoLeadingComments */) !== 0;
+            var skipTrailingComments = disabled || end < 0 || (emitFlags & 1024 /* NoTrailingComments */) !== 0;
             if (!skipLeadingComments) {
                 emitDetachedCommentsAndUpdateCommentsInfo(detachedRange);
             }
             if (extendedDiagnostics) {
                 ts.performance.measure("commentTime", "preEmitBodyWithDetachedComments");
             }
-            if (emitFlags & 65536 /* NoNestedComments */ && !disabled) {
+            if (emitFlags & 2048 /* NoNestedComments */ && !disabled) {
                 disabled = true;
                 emitCallback(node);
                 disabled = false;
@@ -56370,6 +68009,9 @@ var ts;
             }
             if (!skipTrailingComments) {
                 emitLeadingComments(detachedRange.end, /*isEmittedNode*/ true);
+                if (hasWrittenComment && !writer.isAtStartOfLine()) {
+                    writer.writeLine();
+                }
             }
             if (extendedDiagnostics) {
                 ts.performance.measure("commentTime", "beginEmitBodyWithDetachedCommetns");
@@ -56397,15 +68039,17 @@ var ts;
                 emitLeadingComment(commentPos, commentEnd, kind, hasTrailingNewLine, rangePos);
             }
         }
-        function emitLeadingComment(commentPos, commentEnd, kind, hasTrailingNewLine, rangePos) {
+        function emitLeadingComment(commentPos, commentEnd, _kind, hasTrailingNewLine, rangePos) {
             if (!hasWrittenComment) {
                 ts.emitNewLineBeforeLeadingCommentOfPosition(currentLineMap, writer, rangePos, commentPos);
                 hasWrittenComment = true;
             }
             // Leading comments are emitted at /*leading comment1 */space/*leading comment*/space
-            emitPos(commentPos);
+            if (emitPos)
+                emitPos(commentPos);
             ts.writeCommentRange(currentText, currentLineMap, writer, commentPos, commentEnd, newLine);
-            emitPos(commentEnd);
+            if (emitPos)
+                emitPos(commentEnd);
             if (hasTrailingNewLine) {
                 writer.writeLine();
             }
@@ -56413,17 +68057,25 @@ var ts;
                 writer.write(" ");
             }
         }
+        function emitLeadingCommentsOfPosition(pos) {
+            if (disabled || pos === -1) {
+                return;
+            }
+            emitLeadingComments(pos, /*isEmittedNode*/ true);
+        }
         function emitTrailingComments(pos) {
             forEachTrailingCommentToEmit(pos, emitTrailingComment);
         }
-        function emitTrailingComment(commentPos, commentEnd, kind, hasTrailingNewLine) {
+        function emitTrailingComment(commentPos, commentEnd, _kind, hasTrailingNewLine) {
             // trailing comments are emitted at space/*trailing comment1 */space/*trailing comment2*/
             if (!writer.isAtStartOfLine()) {
                 writer.write(" ");
             }
-            emitPos(commentPos);
+            if (emitPos)
+                emitPos(commentPos);
             ts.writeCommentRange(currentText, currentLineMap, writer, commentPos, commentEnd, newLine);
-            emitPos(commentEnd);
+            if (emitPos)
+                emitPos(commentEnd);
             if (hasTrailingNewLine) {
                 writer.writeLine();
             }
@@ -56440,11 +68092,13 @@ var ts;
                 ts.performance.measure("commentTime", "beforeEmitTrailingCommentsOfPosition");
             }
         }
-        function emitTrailingCommentOfPosition(commentPos, commentEnd, kind, hasTrailingNewLine) {
+        function emitTrailingCommentOfPosition(commentPos, commentEnd, _kind, hasTrailingNewLine) {
             // trailing comments of a position are emitted at /*trailing comment1 */space/*trailing comment*/space
-            emitPos(commentPos);
+            if (emitPos)
+                emitPos(commentPos);
             ts.writeCommentRange(currentText, currentLineMap, writer, commentPos, commentEnd, newLine);
-            emitPos(commentEnd);
+            if (emitPos)
+                emitPos(commentEnd);
             if (hasTrailingNewLine) {
                 writer.writeLine();
             }
@@ -56475,6 +68129,9 @@ var ts;
             currentLineMap = undefined;
             detachedCommentsInfo = undefined;
         }
+        function setWriter(output) {
+            writer = output;
+        }
         function setSourceFile(sourceFile) {
             currentSourceFile = sourceFile;
             currentText = currentSourceFile.text;
@@ -56507,15 +68164,17 @@ var ts;
             }
         }
         function writeComment(text, lineMap, writer, commentPos, commentEnd, newLine) {
-            emitPos(commentPos);
+            if (emitPos)
+                emitPos(commentPos);
             ts.writeCommentRange(text, lineMap, writer, commentPos, commentEnd, newLine);
-            emitPos(commentEnd);
+            if (emitPos)
+                emitPos(commentEnd);
         }
         /**
          * Determine if the given comment is a triple-slash
          *
          * @return true if the comment is a triple-slash comment else false
-         **/
+         */
         function isTripleSlashComment(commentPos, commentEnd) {
             // Verify this is /// comment, but do the regexp match only when we first can find /// in the comment text
             // so that we don't end up computing comment string and doing match for all // comments
@@ -56532,167 +68191,131 @@ var ts;
     }
     ts.createCommentWriter = createCommentWriter;
 })(ts || (ts = {}));
-/// <reference path="checker.ts"/>
+/// <reference path="checker.ts" />
 /// <reference path="transformer.ts" />
-/// <reference path="declarationEmitter.ts"/>
-/// <reference path="sourcemap.ts"/>
+/// <reference path="declarationEmitter.ts" />
+/// <reference path="sourcemap.ts" />
 /// <reference path="comments.ts" />
-/* @internal */
 var ts;
 (function (ts) {
-    // Flags enum to track count of temp variables and a few dedicated names
-    var TempFlags;
-    (function (TempFlags) {
-        TempFlags[TempFlags["Auto"] = 0] = "Auto";
-        TempFlags[TempFlags["CountMask"] = 268435455] = "CountMask";
-        TempFlags[TempFlags["_i"] = 268435456] = "_i";
-    })(TempFlags || (TempFlags = {}));
-    var id = function (s) { return s; };
-    var nullTransformers = [function (ctx) { return id; }];
+    var delimiters = createDelimiterMap();
+    var brackets = createBracketsMap();
+    /*@internal*/
+    /**
+     * Iterates over the source files that are expected to have an emit output.
+     *
+     * @param host An EmitHost.
+     * @param action The action to execute.
+     * @param sourceFilesOrTargetSourceFile
+     *   If an array, the full list of source files to emit.
+     *   Else, calls `getSourceFilesToEmit` with the (optional) target source file to determine the list of source files to emit.
+     */
+    function forEachEmittedFile(host, action, sourceFilesOrTargetSourceFile, emitOnlyDtsFiles) {
+        var sourceFiles = ts.isArray(sourceFilesOrTargetSourceFile) ? sourceFilesOrTargetSourceFile : ts.getSourceFilesToEmit(host, sourceFilesOrTargetSourceFile);
+        var options = host.getCompilerOptions();
+        if (options.outFile || options.out) {
+            if (sourceFiles.length) {
+                var jsFilePath = options.outFile || options.out;
+                var sourceMapFilePath = getSourceMapFilePath(jsFilePath, options);
+                var declarationFilePath = options.declaration ? ts.removeFileExtension(jsFilePath) + ".d.ts" /* Dts */ : "";
+                action({ jsFilePath: jsFilePath, sourceMapFilePath: sourceMapFilePath, declarationFilePath: declarationFilePath }, ts.createBundle(sourceFiles), emitOnlyDtsFiles);
+            }
+        }
+        else {
+            for (var _a = 0, sourceFiles_1 = sourceFiles; _a < sourceFiles_1.length; _a++) {
+                var sourceFile = sourceFiles_1[_a];
+                var jsFilePath = ts.getOwnEmitOutputFilePath(sourceFile, host, getOutputExtension(sourceFile, options));
+                var sourceMapFilePath = getSourceMapFilePath(jsFilePath, options);
+                var declarationFilePath = !ts.isSourceFileJavaScript(sourceFile) && (emitOnlyDtsFiles || options.declaration) ? ts.getDeclarationEmitOutputFilePath(sourceFile, host) : undefined;
+                action({ jsFilePath: jsFilePath, sourceMapFilePath: sourceMapFilePath, declarationFilePath: declarationFilePath }, sourceFile, emitOnlyDtsFiles);
+            }
+        }
+    }
+    ts.forEachEmittedFile = forEachEmittedFile;
+    function getSourceMapFilePath(jsFilePath, options) {
+        return options.sourceMap ? jsFilePath + ".map" : undefined;
+    }
+    // JavaScript files are always LanguageVariant.JSX, as JSX syntax is allowed in .js files also.
+    // So for JavaScript files, '.jsx' is only emitted if the input was '.jsx', and JsxEmit.Preserve.
+    // For TypeScript, the only time to emit with a '.jsx' extension, is on JSX input, and JsxEmit.Preserve
+    function getOutputExtension(sourceFile, options) {
+        if (options.jsx === 1 /* Preserve */) {
+            if (ts.isSourceFileJavaScript(sourceFile)) {
+                if (ts.fileExtensionIs(sourceFile.fileName, ".jsx" /* Jsx */)) {
+                    return ".jsx" /* Jsx */;
+                }
+            }
+            else if (sourceFile.languageVariant === 1 /* JSX */) {
+                // TypeScript source file preserving JSX syntax
+                return ".jsx" /* Jsx */;
+            }
+        }
+        return ".js" /* Js */;
+    }
+    function getOriginalSourceFileOrBundle(sourceFileOrBundle) {
+        if (sourceFileOrBundle.kind === 266 /* Bundle */) {
+            return ts.updateBundle(sourceFileOrBundle, ts.sameMap(sourceFileOrBundle.sourceFiles, ts.getOriginalSourceFile));
+        }
+        return ts.getOriginalSourceFile(sourceFileOrBundle);
+    }
+    /*@internal*/
     // targetSourceFile is when users only want one file in entire project to be emitted. This is used in compileOnSave feature
-    function emitFiles(resolver, host, targetSourceFile, emitOnlyDtsFiles) {
-        var delimiters = createDelimiterMap();
-        var brackets = createBracketsMap();
-        // emit output for the __extends helper function
-        var extendsHelper = "\nvar __extends = (this && this.__extends) || function (d, b) {\n    for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];\n    function __() { this.constructor = d; }\n    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\n};";
-        // Emit output for the __assign helper function.
-        // This is typically used for JSX spread attributes,
-        // and can be used for object literal spread properties.
-        var assignHelper = "\nvar __assign = (this && this.__assign) || Object.assign || function(t) {\n    for (var s, i = 1, n = arguments.length; i < n; i++) {\n        s = arguments[i];\n        for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))\n            t[p] = s[p];\n    }\n    return t;\n};";
-        // emit output for the __decorate helper function
-        var decorateHelper = "\nvar __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {\n    var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;\n    if (typeof Reflect === \"object\" && typeof Reflect.decorate === \"function\") r = Reflect.decorate(decorators, target, key, desc);\n    else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;\n    return c > 3 && r && Object.defineProperty(target, key, r), r;\n};";
-        // emit output for the __metadata helper function
-        var metadataHelper = "\nvar __metadata = (this && this.__metadata) || function (k, v) {\n    if (typeof Reflect === \"object\" && typeof Reflect.metadata === \"function\") return Reflect.metadata(k, v);\n};";
-        // emit output for the __param helper function
-        var paramHelper = "\nvar __param = (this && this.__param) || function (paramIndex, decorator) {\n    return function (target, key) { decorator(target, key, paramIndex); }\n};";
-        // emit output for the __awaiter helper function
-        var awaiterHelper = "\nvar __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {\n    return new (P || (P = Promise))(function (resolve, reject) {\n        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }\n        function rejected(value) { try { step(generator.throw(value)); } catch (e) { reject(e); } }\n        function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }\n        step((generator = generator.apply(thisArg, _arguments)).next());\n    });\n};";
-        // The __generator helper is used by down-level transformations to emulate the runtime
-        // semantics of an ES2015 generator function. When called, this helper returns an
-        // object that implements the Iterator protocol, in that it has `next`, `return`, and
-        // `throw` methods that step through the generator when invoked.
-        //
-        // parameters:
-        //  thisArg  The value to use as the `this` binding for the transformed generator body.
-        //  body     A function that acts as the transformed generator body.
-        //
-        // variables:
-        //  _       Persistent state for the generator that is shared between the helper and the
-        //          generator body. The state object has the following members:
-        //            sent() - A method that returns or throws the current completion value.
-        //            label  - The next point at which to resume evaluation of the generator body.
-        //            trys   - A stack of protected regions (try/catch/finally blocks).
-        //            ops    - A stack of pending instructions when inside of a finally block.
-        //  f       A value indicating whether the generator is executing.
-        //  y       An iterator to delegate for a yield*.
-        //  t       A temporary variable that holds one of the following values (note that these
-        //          cases do not overlap):
-        //          - The completion value when resuming from a `yield` or `yield*`.
-        //          - The error value for a catch block.
-        //          - The current protected region (array of try/catch/finally/end labels).
-        //          - The verb (`next`, `throw`, or `return` method) to delegate to the expression
-        //            of a `yield*`.
-        //          - The result of evaluating the verb delegated to the expression of a `yield*`.
-        //
-        // functions:
-        //  verb(n)     Creates a bound callback to the `step` function for opcode `n`.
-        //  step(op)    Evaluates opcodes in a generator body until execution is suspended or
-        //              completed.
-        //
-        // The __generator helper understands a limited set of instructions:
-        //  0: next(value?)     - Start or resume the generator with the specified value.
-        //  1: throw(error)     - Resume the generator with an exception. If the generator is
-        //                        suspended inside of one or more protected regions, evaluates
-        //                        any intervening finally blocks between the current label and
-        //                        the nearest catch block or function boundary. If uncaught, the
-        //                        exception is thrown to the caller.
-        //  2: return(value?)   - Resume the generator as if with a return. If the generator is
-        //                        suspended inside of one or more protected regions, evaluates any
-        //                        intervening finally blocks.
-        //  3: break(label)     - Jump to the specified label. If the label is outside of the
-        //                        current protected region, evaluates any intervening finally
-        //                        blocks.
-        //  4: yield(value?)    - Yield execution to the caller with an optional value. When
-        //                        resumed, the generator will continue at the next label.
-        //  5: yield*(value)    - Delegates evaluation to the supplied iterator. When
-        //                        delegation completes, the generator will continue at the next
-        //                        label.
-        //  6: catch(error)     - Handles an exception thrown from within the generator body. If
-        //                        the current label is inside of one or more protected regions,
-        //                        evaluates any intervening finally blocks between the current
-        //                        label and the nearest catch block or function boundary. If
-        //                        uncaught, the exception is thrown to the caller.
-        //  7: endfinally       - Ends a finally block, resuming the last instruction prior to
-        //                        entering a finally block.
-        //
-        // For examples of how these are used, see the comments in ./transformers/generators.ts
-        var generatorHelper = "\nvar __generator = (this && this.__generator) || function (thisArg, body) {\n    var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t;\n    return { next: verb(0), \"throw\": verb(1), \"return\": verb(2) };\n    function verb(n) { return function (v) { return step([n, v]); }; }\n    function step(op) {\n        if (f) throw new TypeError(\"Generator is already executing.\");\n        while (_) try {\n            if (f = 1, y && (t = y[op[0] & 2 ? \"return\" : op[0] ? \"throw\" : \"next\"]) && !(t = t.call(y, op[1])).done) return t;\n            if (y = 0, t) op = [0, t.value];\n            switch (op[0]) {\n                case 0: case 1: t = op; break;\n                case 4: _.label++; return { value: op[1], done: false };\n                case 5: _.label++; y = op[1]; op = [0]; continue;\n                case 7: op = _.ops.pop(); _.trys.pop(); continue;\n                default:\n                    if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }\n                    if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }\n                    if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }\n                    if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }\n                    if (t[2]) _.ops.pop();\n                    _.trys.pop(); continue;\n            }\n            op = body.call(thisArg, _);\n        } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }\n        if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };\n    }\n};";
-        // emit output for the __export helper function
-        var exportStarHelper = "\nfunction __export(m) {\n    for (var p in m) if (!exports.hasOwnProperty(p)) exports[p] = m[p];\n}";
-        // emit output for the UMD helper function.
-        var umdHelper = "\n(function (dependencies, factory) {\n    if (typeof module === 'object' && typeof module.exports === 'object') {\n        var v = factory(require, exports); if (v !== undefined) module.exports = v;\n    }\n    else if (typeof define === 'function' && define.amd) {\n        define(dependencies, factory);\n    }\n})";
-        var superHelper = "\nconst _super = name => super[name];";
-        var advancedSuperHelper = "\nconst _super = (function (geti, seti) {\n    const cache = Object.create(null);\n    return name => cache[name] || (cache[name] = { get value() { return geti(name); }, set value(v) { seti(name, v); } });\n})(name => super[name], (name, value) => super[name] = value);";
+    function emitFiles(resolver, host, targetSourceFile, emitOnlyDtsFiles, transformers) {
         var compilerOptions = host.getCompilerOptions();
-        var languageVersion = ts.getEmitScriptTarget(compilerOptions);
         var moduleKind = ts.getEmitModuleKind(compilerOptions);
         var sourceMapDataList = compilerOptions.sourceMap || compilerOptions.inlineSourceMap ? [] : undefined;
         var emittedFilesList = compilerOptions.listEmittedFiles ? [] : undefined;
         var emitterDiagnostics = ts.createDiagnosticCollection();
         var newLine = host.getNewLine();
-        var transformers = emitOnlyDtsFiles ? nullTransformers : ts.getTransformers(compilerOptions);
         var writer = ts.createTextWriter(newLine);
-        var write = writer.write, writeLine = writer.writeLine, increaseIndent = writer.increaseIndent, decreaseIndent = writer.decreaseIndent;
         var sourceMap = ts.createSourceMapWriter(host, writer);
-        var emitNodeWithSourceMap = sourceMap.emitNodeWithSourceMap, emitTokenWithSourceMap = sourceMap.emitTokenWithSourceMap;
-        var comments = ts.createCommentWriter(host, writer, sourceMap);
-        var emitNodeWithComments = comments.emitNodeWithComments, emitBodyWithDetachedComments = comments.emitBodyWithDetachedComments, emitTrailingCommentsOfPosition = comments.emitTrailingCommentsOfPosition;
-        var nodeIdToGeneratedName;
-        var autoGeneratedIdToGeneratedName;
-        var generatedNameSet;
-        var tempFlags;
         var currentSourceFile;
-        var currentText;
-        var currentFileIdentifiers;
-        var extendsEmitted;
-        var assignEmitted;
-        var decorateEmitted;
-        var paramEmitted;
-        var awaiterEmitted;
+        var bundledHelpers;
         var isOwnFileEmit;
         var emitSkipped = false;
         var sourceFiles = ts.getSourceFilesToEmit(host, targetSourceFile);
         // Transform the source files
-        ts.performance.mark("beforeTransform");
-        var _a = ts.transformFiles(resolver, host, sourceFiles, transformers), transformed = _a.transformed, emitNodeWithSubstitution = _a.emitNodeWithSubstitution, emitNodeWithNotification = _a.emitNodeWithNotification;
-        ts.performance.measure("transformTime", "beforeTransform");
+        var transform = ts.transformNodes(resolver, host, compilerOptions, sourceFiles, transformers, /*allowDtsFiles*/ false);
+        // Create a printer to print the nodes
+        var printer = createPrinter(compilerOptions, {
+            // resolver hooks
+            hasGlobalName: resolver.hasGlobalName,
+            // transform hooks
+            onEmitNode: transform.emitNodeWithNotification,
+            substituteNode: transform.substituteNode,
+            // sourcemap hooks
+            onEmitSourceMapOfNode: sourceMap.emitNodeWithSourceMap,
+            onEmitSourceMapOfToken: sourceMap.emitTokenWithSourceMap,
+            onEmitSourceMapOfPosition: sourceMap.emitPos,
+            // emitter hooks
+            onEmitHelpers: emitHelpers,
+            onSetSourceFile: setSourceFile,
+        });
         // Emit each output file
         ts.performance.mark("beforePrint");
-        ts.forEachTransformedEmitFile(host, transformed, emitFile, emitOnlyDtsFiles);
+        forEachEmittedFile(host, emitSourceFileOrBundle, transform.transformed, emitOnlyDtsFiles);
         ts.performance.measure("printTime", "beforePrint");
         // Clean up emit nodes on parse tree
-        for (var _b = 0, sourceFiles_4 = sourceFiles; _b < sourceFiles_4.length; _b++) {
-            var sourceFile = sourceFiles_4[_b];
-            ts.disposeEmitNodes(sourceFile);
-        }
+        transform.dispose();
         return {
             emitSkipped: emitSkipped,
             diagnostics: emitterDiagnostics.getDiagnostics(),
             emittedFiles: emittedFilesList,
             sourceMaps: sourceMapDataList
         };
-        function emitFile(jsFilePath, sourceMapFilePath, declarationFilePath, sourceFiles, isBundledEmit) {
+        function emitSourceFileOrBundle(_a, sourceFileOrBundle) {
+            var jsFilePath = _a.jsFilePath, sourceMapFilePath = _a.sourceMapFilePath, declarationFilePath = _a.declarationFilePath;
             // Make sure not to write js file and source map file if any of them cannot be written
             if (!host.isEmitBlocked(jsFilePath) && !compilerOptions.noEmit) {
                 if (!emitOnlyDtsFiles) {
-                    printFile(jsFilePath, sourceMapFilePath, sourceFiles, isBundledEmit);
+                    printSourceFileOrBundle(jsFilePath, sourceMapFilePath, sourceFileOrBundle);
                 }
             }
             else {
                 emitSkipped = true;
             }
             if (declarationFilePath) {
-                emitSkipped = ts.writeDeclarationFile(declarationFilePath, ts.getOriginalSourceFiles(sourceFiles), isBundledEmit, host, resolver, emitterDiagnostics, emitOnlyDtsFiles) || emitSkipped;
+                emitSkipped = ts.writeDeclarationFile(declarationFilePath, getOriginalSourceFileOrBundle(sourceFileOrBundle), host, resolver, emitterDiagnostics, emitOnlyDtsFiles) || emitSkipped;
             }
             if (!emitSkipped && emittedFilesList) {
                 if (!emitOnlyDtsFiles) {
@@ -56706,491 +68329,581 @@ var ts;
                 }
             }
         }
-        function printFile(jsFilePath, sourceMapFilePath, sourceFiles, isBundledEmit) {
-            sourceMap.initialize(jsFilePath, sourceMapFilePath, sourceFiles, isBundledEmit);
-            nodeIdToGeneratedName = [];
-            autoGeneratedIdToGeneratedName = [];
-            generatedNameSet = ts.createMap();
-            isOwnFileEmit = !isBundledEmit;
-            // Emit helpers from all the files
-            if (isBundledEmit && moduleKind) {
-                for (var _a = 0, sourceFiles_5 = sourceFiles; _a < sourceFiles_5.length; _a++) {
-                    var sourceFile = sourceFiles_5[_a];
-                    emitEmitHelpers(sourceFile);
-                }
+        function printSourceFileOrBundle(jsFilePath, sourceMapFilePath, sourceFileOrBundle) {
+            var bundle = sourceFileOrBundle.kind === 266 /* Bundle */ ? sourceFileOrBundle : undefined;
+            var sourceFile = sourceFileOrBundle.kind === 265 /* SourceFile */ ? sourceFileOrBundle : undefined;
+            var sourceFiles = bundle ? bundle.sourceFiles : [sourceFile];
+            sourceMap.initialize(jsFilePath, sourceMapFilePath, sourceFileOrBundle);
+            if (bundle) {
+                bundledHelpers = ts.createMap();
+                isOwnFileEmit = false;
+                printer.writeBundle(bundle, writer);
             }
-            // Print each transformed source file.
-            ts.forEach(sourceFiles, printSourceFile);
-            writeLine();
+            else {
+                isOwnFileEmit = true;
+                printer.writeFile(sourceFile, writer);
+            }
+            writer.writeLine();
             var sourceMappingURL = sourceMap.getSourceMappingURL();
             if (sourceMappingURL) {
-                write("//# " + "sourceMappingURL" + "=" + sourceMappingURL); // Sometimes tools can sometimes see this line as a source mapping url comment
+                writer.write("//# " + "sourceMappingURL" + "=" + sourceMappingURL); // Sometimes tools can sometimes see this line as a source mapping url comment
             }
             // Write the source map
             if (compilerOptions.sourceMap && !compilerOptions.inlineSourceMap) {
-                ts.writeFile(host, emitterDiagnostics, sourceMapFilePath, sourceMap.getText(), /*writeByteOrderMark*/ false);
+                ts.writeFile(host, emitterDiagnostics, sourceMapFilePath, sourceMap.getText(), /*writeByteOrderMark*/ false, sourceFiles);
             }
             // Record source map data for the test harness.
             if (sourceMapDataList) {
                 sourceMapDataList.push(sourceMap.getSourceMapData());
             }
             // Write the output file
-            ts.writeFile(host, emitterDiagnostics, jsFilePath, writer.getText(), compilerOptions.emitBOM);
+            ts.writeFile(host, emitterDiagnostics, jsFilePath, writer.getText(), compilerOptions.emitBOM, sourceFiles);
             // Reset state
             sourceMap.reset();
-            comments.reset();
             writer.reset();
-            tempFlags = 0 /* Auto */;
             currentSourceFile = undefined;
-            currentText = undefined;
-            extendsEmitted = false;
-            assignEmitted = false;
-            decorateEmitted = false;
-            paramEmitted = false;
-            awaiterEmitted = false;
+            bundledHelpers = undefined;
             isOwnFileEmit = false;
         }
-        function printSourceFile(node) {
+        function setSourceFile(node) {
             currentSourceFile = node;
-            currentText = node.text;
-            currentFileIdentifiers = node.identifiers;
             sourceMap.setSourceFile(node);
-            comments.setSourceFile(node);
-            pipelineEmitWithNotification(0 /* SourceFile */, node);
         }
-        /**
-         * Emits a node.
-         */
+        function emitHelpers(node, writeLines) {
+            var helpersEmitted = false;
+            var bundle = node.kind === 266 /* Bundle */ ? node : undefined;
+            if (bundle && moduleKind === ts.ModuleKind.None) {
+                return;
+            }
+            var numNodes = bundle ? bundle.sourceFiles.length : 1;
+            for (var i = 0; i < numNodes; i++) {
+                var currentNode = bundle ? bundle.sourceFiles[i] : node;
+                var sourceFile = ts.isSourceFile(currentNode) ? currentNode : currentSourceFile;
+                var shouldSkip = compilerOptions.noEmitHelpers || ts.getExternalHelpersModuleName(sourceFile) !== undefined;
+                var shouldBundle = ts.isSourceFile(currentNode) && !isOwnFileEmit;
+                var helpers = ts.getEmitHelpers(currentNode);
+                if (helpers) {
+                    for (var _a = 0, _b = ts.stableSort(helpers, ts.compareEmitHelpers); _a < _b.length; _a++) {
+                        var helper = _b[_a];
+                        if (!helper.scoped) {
+                            // Skip the helper if it can be skipped and the noEmitHelpers compiler
+                            // option is set, or if it can be imported and the importHelpers compiler
+                            // option is set.
+                            if (shouldSkip)
+                                continue;
+                            // Skip the helper if it can be bundled but hasn't already been emitted and we
+                            // are emitting a bundled module.
+                            if (shouldBundle) {
+                                if (bundledHelpers.get(helper.name)) {
+                                    continue;
+                                }
+                                bundledHelpers.set(helper.name, true);
+                            }
+                        }
+                        else if (bundle) {
+                            // Skip the helper if it is scoped and we are emitting bundled helpers
+                            continue;
+                        }
+                        writeLines(helper.text);
+                        helpersEmitted = true;
+                    }
+                }
+            }
+            return helpersEmitted;
+        }
+    }
+    ts.emitFiles = emitFiles;
+    function createPrinter(printerOptions, handlers) {
+        if (printerOptions === void 0) { printerOptions = {}; }
+        if (handlers === void 0) { handlers = {}; }
+        var hasGlobalName = handlers.hasGlobalName, onEmitSourceMapOfNode = handlers.onEmitSourceMapOfNode, onEmitSourceMapOfToken = handlers.onEmitSourceMapOfToken, onEmitSourceMapOfPosition = handlers.onEmitSourceMapOfPosition, onEmitNode = handlers.onEmitNode, onEmitHelpers = handlers.onEmitHelpers, onSetSourceFile = handlers.onSetSourceFile, substituteNode = handlers.substituteNode, onBeforeEmitNodeArray = handlers.onBeforeEmitNodeArray, onAfterEmitNodeArray = handlers.onAfterEmitNodeArray, onBeforeEmitToken = handlers.onBeforeEmitToken, onAfterEmitToken = handlers.onAfterEmitToken;
+        var newLine = ts.getNewLineCharacter(printerOptions);
+        var comments = ts.createCommentWriter(printerOptions, onEmitSourceMapOfPosition);
+        var emitNodeWithComments = comments.emitNodeWithComments, emitBodyWithDetachedComments = comments.emitBodyWithDetachedComments, emitTrailingCommentsOfPosition = comments.emitTrailingCommentsOfPosition, emitLeadingCommentsOfPosition = comments.emitLeadingCommentsOfPosition;
+        var currentSourceFile;
+        var nodeIdToGeneratedName; // Map of generated names for specific nodes.
+        var autoGeneratedIdToGeneratedName; // Map of generated names for temp and loop variables.
+        var generatedNames; // Set of names generated by the NameGenerator.
+        var tempFlagsStack; // Stack of enclosing name generation scopes.
+        var tempFlags; // TempFlags for the current name generation scope.
+        var writer;
+        var ownWriter;
+        reset();
+        return {
+            // public API
+            printNode: printNode,
+            printFile: printFile,
+            printBundle: printBundle,
+            // internal API
+            writeNode: writeNode,
+            writeFile: writeFile,
+            writeBundle: writeBundle
+        };
+        function printNode(hint, node, sourceFile) {
+            switch (hint) {
+                case 0 /* SourceFile */:
+                    ts.Debug.assert(ts.isSourceFile(node), "Expected a SourceFile node.");
+                    break;
+                case 2 /* IdentifierName */:
+                    ts.Debug.assert(ts.isIdentifier(node), "Expected an Identifier node.");
+                    break;
+                case 1 /* Expression */:
+                    ts.Debug.assert(ts.isExpression(node), "Expected an Expression node.");
+                    break;
+            }
+            switch (node.kind) {
+                case 265 /* SourceFile */: return printFile(node);
+                case 266 /* Bundle */: return printBundle(node);
+            }
+            writeNode(hint, node, sourceFile, beginPrint());
+            return endPrint();
+        }
+        function printBundle(bundle) {
+            writeBundle(bundle, beginPrint());
+            return endPrint();
+        }
+        function printFile(sourceFile) {
+            writeFile(sourceFile, beginPrint());
+            return endPrint();
+        }
+        function writeNode(hint, node, sourceFile, output) {
+            var previousWriter = writer;
+            setWriter(output);
+            print(hint, node, sourceFile);
+            reset();
+            writer = previousWriter;
+        }
+        function writeBundle(bundle, output) {
+            var previousWriter = writer;
+            setWriter(output);
+            emitShebangIfNeeded(bundle);
+            emitPrologueDirectivesIfNeeded(bundle);
+            emitHelpersIndirect(bundle);
+            for (var _a = 0, _b = bundle.sourceFiles; _a < _b.length; _a++) {
+                var sourceFile = _b[_a];
+                print(0 /* SourceFile */, sourceFile, sourceFile);
+            }
+            reset();
+            writer = previousWriter;
+        }
+        function writeFile(sourceFile, output) {
+            var previousWriter = writer;
+            setWriter(output);
+            emitShebangIfNeeded(sourceFile);
+            emitPrologueDirectivesIfNeeded(sourceFile);
+            print(0 /* SourceFile */, sourceFile, sourceFile);
+            reset();
+            writer = previousWriter;
+        }
+        function beginPrint() {
+            return ownWriter || (ownWriter = ts.createTextWriter(newLine));
+        }
+        function endPrint() {
+            var text = ownWriter.getText();
+            ownWriter.reset();
+            return text;
+        }
+        function print(hint, node, sourceFile) {
+            if (sourceFile) {
+                setSourceFile(sourceFile);
+            }
+            pipelineEmitWithNotification(hint, node);
+        }
+        function setSourceFile(sourceFile) {
+            currentSourceFile = sourceFile;
+            comments.setSourceFile(sourceFile);
+            if (onSetSourceFile) {
+                onSetSourceFile(sourceFile);
+            }
+        }
+        function setWriter(output) {
+            writer = output;
+            comments.setWriter(output);
+        }
+        function reset() {
+            nodeIdToGeneratedName = [];
+            autoGeneratedIdToGeneratedName = [];
+            generatedNames = ts.createMap();
+            tempFlagsStack = [];
+            tempFlags = 0 /* Auto */;
+            comments.reset();
+            setWriter(/*output*/ undefined);
+        }
         function emit(node) {
             pipelineEmitWithNotification(3 /* Unspecified */, node);
         }
-        /**
-         * Emits an IdentifierName.
-         */
         function emitIdentifierName(node) {
             pipelineEmitWithNotification(2 /* IdentifierName */, node);
         }
-        /**
-         * Emits an expression node.
-         */
         function emitExpression(node) {
             pipelineEmitWithNotification(1 /* Expression */, node);
         }
-        /**
-         * Emits a node with possible notification.
-         *
-         * NOTE: Do not call this method directly. It is part of the emit pipeline
-         * and should only be called from printSourceFile, emit, emitExpression, or
-         * emitIdentifierName.
-         */
-        function pipelineEmitWithNotification(emitContext, node) {
-            emitNodeWithNotification(emitContext, node, pipelineEmitWithComments);
-        }
-        /**
-         * Emits a node with comments.
-         *
-         * NOTE: Do not call this method directly. It is part of the emit pipeline
-         * and should only be called indirectly from pipelineEmitWithNotification.
-         */
-        function pipelineEmitWithComments(emitContext, node) {
-            // Do not emit comments for SourceFile
-            if (emitContext === 0 /* SourceFile */) {
-                pipelineEmitWithSourceMap(emitContext, node);
-                return;
+        function pipelineEmitWithNotification(hint, node) {
+            if (onEmitNode) {
+                onEmitNode(hint, node, pipelineEmitWithComments);
             }
-            emitNodeWithComments(emitContext, node, pipelineEmitWithSourceMap);
-        }
-        /**
-         * Emits a node with source maps.
-         *
-         * NOTE: Do not call this method directly. It is part of the emit pipeline
-         * and should only be called indirectly from pipelineEmitWithComments.
-         */
-        function pipelineEmitWithSourceMap(emitContext, node) {
-            // Do not emit source mappings for SourceFile or IdentifierName
-            if (emitContext === 0 /* SourceFile */
-                || emitContext === 2 /* IdentifierName */) {
-                pipelineEmitWithSubstitution(emitContext, node);
-                return;
+            else {
+                pipelineEmitWithComments(hint, node);
             }
-            emitNodeWithSourceMap(emitContext, node, pipelineEmitWithSubstitution);
-        }
-        /**
-         * Emits a node with possible substitution.
-         *
-         * NOTE: Do not call this method directly. It is part of the emit pipeline
-         * and should only be called indirectly from pipelineEmitWithSourceMap or
-         * pipelineEmitInUnspecifiedContext (when picking a more specific context).
-         */
-        function pipelineEmitWithSubstitution(emitContext, node) {
-            emitNodeWithSubstitution(emitContext, node, pipelineEmitForContext);
         }
-        /**
-         * Emits a node.
-         *
-         * NOTE: Do not call this method directly. It is part of the emit pipeline
-         * and should only be called indirectly from pipelineEmitWithSubstitution.
-         */
-        function pipelineEmitForContext(emitContext, node) {
-            switch (emitContext) {
-                case 0 /* SourceFile */: return pipelineEmitInSourceFileContext(node);
-                case 2 /* IdentifierName */: return pipelineEmitInIdentifierNameContext(node);
-                case 3 /* Unspecified */: return pipelineEmitInUnspecifiedContext(node);
-                case 1 /* Expression */: return pipelineEmitInExpressionContext(node);
+        function pipelineEmitWithComments(hint, node) {
+            node = trySubstituteNode(hint, node);
+            if (emitNodeWithComments && hint !== 0 /* SourceFile */) {
+                emitNodeWithComments(hint, node, pipelineEmitWithSourceMap);
+            }
+            else {
+                pipelineEmitWithSourceMap(hint, node);
             }
         }
-        /**
-         * Emits a node in the SourceFile EmitContext.
-         *
-         * NOTE: Do not call this method directly. It is part of the emit pipeline
-         * and should only be called indirectly from pipelineEmitForContext.
-         */
-        function pipelineEmitInSourceFileContext(node) {
-            var kind = node.kind;
-            switch (kind) {
-                // Top-level nodes
-                case 256 /* SourceFile */:
-                    return emitSourceFile(node);
+        function pipelineEmitWithSourceMap(hint, node) {
+            if (onEmitSourceMapOfNode && hint !== 0 /* SourceFile */ && hint !== 2 /* IdentifierName */) {
+                onEmitSourceMapOfNode(hint, node, pipelineEmitWithHint);
+            }
+            else {
+                pipelineEmitWithHint(hint, node);
             }
         }
-        /**
-         * Emits a node in the IdentifierName EmitContext.
-         *
-         * NOTE: Do not call this method directly. It is part of the emit pipeline
-         * and should only be called indirectly from pipelineEmitForContext.
-         */
-        function pipelineEmitInIdentifierNameContext(node) {
-            var kind = node.kind;
-            switch (kind) {
-                // Identifiers
-                case 69 /* Identifier */:
-                    return emitIdentifier(node);
+        function pipelineEmitWithHint(hint, node) {
+            switch (hint) {
+                case 0 /* SourceFile */: return pipelineEmitSourceFile(node);
+                case 2 /* IdentifierName */: return pipelineEmitIdentifierName(node);
+                case 1 /* Expression */: return pipelineEmitExpression(node);
+                case 3 /* Unspecified */: return pipelineEmitUnspecified(node);
             }
         }
-        /**
-         * Emits a node in the Unspecified EmitContext.
-         *
-         * NOTE: Do not call this method directly. It is part of the emit pipeline
-         * and should only be called indirectly from pipelineEmitForContext.
-         */
-        function pipelineEmitInUnspecifiedContext(node) {
+        function pipelineEmitSourceFile(node) {
+            ts.Debug.assertNode(node, ts.isSourceFile);
+            emitSourceFile(node);
+        }
+        function pipelineEmitIdentifierName(node) {
+            ts.Debug.assertNode(node, ts.isIdentifier);
+            emitIdentifier(node);
+        }
+        function pipelineEmitUnspecified(node) {
             var kind = node.kind;
+            // Reserved words
+            // Strict mode reserved words
+            // Contextual keywords
+            if (ts.isKeyword(kind)) {
+                writeTokenNode(node);
+                return;
+            }
             switch (kind) {
                 // Pseudo-literals
-                case 12 /* TemplateHead */:
-                case 13 /* TemplateMiddle */:
-                case 14 /* TemplateTail */:
+                case 14 /* TemplateHead */:
+                case 15 /* TemplateMiddle */:
+                case 16 /* TemplateTail */:
                     return emitLiteral(node);
                 // Identifiers
-                case 69 /* Identifier */:
+                case 71 /* Identifier */:
                     return emitIdentifier(node);
-                // Reserved words
-                case 74 /* ConstKeyword */:
-                case 77 /* DefaultKeyword */:
-                case 82 /* ExportKeyword */:
-                case 103 /* VoidKeyword */:
-                // Strict mode reserved words
-                case 110 /* PrivateKeyword */:
-                case 111 /* ProtectedKeyword */:
-                case 112 /* PublicKeyword */:
-                case 113 /* StaticKeyword */:
-                // Contextual keywords
-                case 115 /* AbstractKeyword */:
-                case 117 /* AnyKeyword */:
-                case 118 /* AsyncKeyword */:
-                case 120 /* BooleanKeyword */:
-                case 122 /* DeclareKeyword */:
-                case 130 /* NumberKeyword */:
-                case 128 /* ReadonlyKeyword */:
-                case 132 /* StringKeyword */:
-                case 133 /* SymbolKeyword */:
-                case 137 /* GlobalKeyword */:
-                    writeTokenText(kind);
-                    return;
                 // Parse tree nodes
                 // Names
-                case 139 /* QualifiedName */:
+                case 143 /* QualifiedName */:
                     return emitQualifiedName(node);
-                case 140 /* ComputedPropertyName */:
+                case 144 /* ComputedPropertyName */:
                     return emitComputedPropertyName(node);
                 // Signature elements
-                case 141 /* TypeParameter */:
+                case 145 /* TypeParameter */:
                     return emitTypeParameter(node);
-                case 142 /* Parameter */:
+                case 146 /* Parameter */:
                     return emitParameter(node);
-                case 143 /* Decorator */:
+                case 147 /* Decorator */:
                     return emitDecorator(node);
                 // Type members
-                case 144 /* PropertySignature */:
+                case 148 /* PropertySignature */:
                     return emitPropertySignature(node);
-                case 145 /* PropertyDeclaration */:
+                case 149 /* PropertyDeclaration */:
                     return emitPropertyDeclaration(node);
-                case 146 /* MethodSignature */:
+                case 150 /* MethodSignature */:
                     return emitMethodSignature(node);
-                case 147 /* MethodDeclaration */:
+                case 151 /* MethodDeclaration */:
                     return emitMethodDeclaration(node);
-                case 148 /* Constructor */:
+                case 152 /* Constructor */:
                     return emitConstructor(node);
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
+                case 153 /* GetAccessor */:
+                case 154 /* SetAccessor */:
                     return emitAccessorDeclaration(node);
-                case 151 /* CallSignature */:
+                case 155 /* CallSignature */:
                     return emitCallSignature(node);
-                case 152 /* ConstructSignature */:
+                case 156 /* ConstructSignature */:
                     return emitConstructSignature(node);
-                case 153 /* IndexSignature */:
+                case 157 /* IndexSignature */:
                     return emitIndexSignature(node);
                 // Types
-                case 154 /* TypePredicate */:
+                case 158 /* TypePredicate */:
                     return emitTypePredicate(node);
-                case 155 /* TypeReference */:
+                case 159 /* TypeReference */:
                     return emitTypeReference(node);
-                case 156 /* FunctionType */:
+                case 160 /* FunctionType */:
                     return emitFunctionType(node);
-                case 157 /* ConstructorType */:
+                case 161 /* ConstructorType */:
                     return emitConstructorType(node);
-                case 158 /* TypeQuery */:
+                case 162 /* TypeQuery */:
                     return emitTypeQuery(node);
-                case 159 /* TypeLiteral */:
+                case 163 /* TypeLiteral */:
                     return emitTypeLiteral(node);
-                case 160 /* ArrayType */:
+                case 164 /* ArrayType */:
                     return emitArrayType(node);
-                case 161 /* TupleType */:
+                case 165 /* TupleType */:
                     return emitTupleType(node);
-                case 162 /* UnionType */:
+                case 166 /* UnionType */:
                     return emitUnionType(node);
-                case 163 /* IntersectionType */:
+                case 167 /* IntersectionType */:
                     return emitIntersectionType(node);
-                case 164 /* ParenthesizedType */:
+                case 168 /* ParenthesizedType */:
                     return emitParenthesizedType(node);
-                case 194 /* ExpressionWithTypeArguments */:
+                case 201 /* ExpressionWithTypeArguments */:
                     return emitExpressionWithTypeArguments(node);
-                case 165 /* ThisType */:
-                    return emitThisType(node);
-                case 166 /* LiteralType */:
+                case 169 /* ThisType */:
+                    return emitThisType();
+                case 170 /* TypeOperator */:
+                    return emitTypeOperator(node);
+                case 171 /* IndexedAccessType */:
+                    return emitIndexedAccessType(node);
+                case 172 /* MappedType */:
+                    return emitMappedType(node);
+                case 173 /* LiteralType */:
                     return emitLiteralType(node);
                 // Binding patterns
-                case 167 /* ObjectBindingPattern */:
+                case 174 /* ObjectBindingPattern */:
                     return emitObjectBindingPattern(node);
-                case 168 /* ArrayBindingPattern */:
+                case 175 /* ArrayBindingPattern */:
                     return emitArrayBindingPattern(node);
-                case 169 /* BindingElement */:
+                case 176 /* BindingElement */:
                     return emitBindingElement(node);
                 // Misc
-                case 197 /* TemplateSpan */:
+                case 205 /* TemplateSpan */:
                     return emitTemplateSpan(node);
-                case 198 /* SemicolonClassElement */:
-                    return emitSemicolonClassElement(node);
+                case 206 /* SemicolonClassElement */:
+                    return emitSemicolonClassElement();
                 // Statements
-                case 199 /* Block */:
+                case 207 /* Block */:
                     return emitBlock(node);
-                case 200 /* VariableStatement */:
+                case 208 /* VariableStatement */:
                     return emitVariableStatement(node);
-                case 201 /* EmptyStatement */:
-                    return emitEmptyStatement(node);
-                case 202 /* ExpressionStatement */:
+                case 209 /* EmptyStatement */:
+                    return emitEmptyStatement();
+                case 210 /* ExpressionStatement */:
                     return emitExpressionStatement(node);
-                case 203 /* IfStatement */:
+                case 211 /* IfStatement */:
                     return emitIfStatement(node);
-                case 204 /* DoStatement */:
+                case 212 /* DoStatement */:
                     return emitDoStatement(node);
-                case 205 /* WhileStatement */:
+                case 213 /* WhileStatement */:
                     return emitWhileStatement(node);
-                case 206 /* ForStatement */:
+                case 214 /* ForStatement */:
                     return emitForStatement(node);
-                case 207 /* ForInStatement */:
+                case 215 /* ForInStatement */:
                     return emitForInStatement(node);
-                case 208 /* ForOfStatement */:
+                case 216 /* ForOfStatement */:
                     return emitForOfStatement(node);
-                case 209 /* ContinueStatement */:
+                case 217 /* ContinueStatement */:
                     return emitContinueStatement(node);
-                case 210 /* BreakStatement */:
+                case 218 /* BreakStatement */:
                     return emitBreakStatement(node);
-                case 211 /* ReturnStatement */:
+                case 219 /* ReturnStatement */:
                     return emitReturnStatement(node);
-                case 212 /* WithStatement */:
+                case 220 /* WithStatement */:
                     return emitWithStatement(node);
-                case 213 /* SwitchStatement */:
+                case 221 /* SwitchStatement */:
                     return emitSwitchStatement(node);
-                case 214 /* LabeledStatement */:
+                case 222 /* LabeledStatement */:
                     return emitLabeledStatement(node);
-                case 215 /* ThrowStatement */:
+                case 223 /* ThrowStatement */:
                     return emitThrowStatement(node);
-                case 216 /* TryStatement */:
+                case 224 /* TryStatement */:
                     return emitTryStatement(node);
-                case 217 /* DebuggerStatement */:
+                case 225 /* DebuggerStatement */:
                     return emitDebuggerStatement(node);
                 // Declarations
-                case 218 /* VariableDeclaration */:
+                case 226 /* VariableDeclaration */:
                     return emitVariableDeclaration(node);
-                case 219 /* VariableDeclarationList */:
+                case 227 /* VariableDeclarationList */:
                     return emitVariableDeclarationList(node);
-                case 220 /* FunctionDeclaration */:
+                case 228 /* FunctionDeclaration */:
                     return emitFunctionDeclaration(node);
-                case 221 /* ClassDeclaration */:
+                case 229 /* ClassDeclaration */:
                     return emitClassDeclaration(node);
-                case 222 /* InterfaceDeclaration */:
+                case 230 /* InterfaceDeclaration */:
                     return emitInterfaceDeclaration(node);
-                case 223 /* TypeAliasDeclaration */:
+                case 231 /* TypeAliasDeclaration */:
                     return emitTypeAliasDeclaration(node);
-                case 224 /* EnumDeclaration */:
+                case 232 /* EnumDeclaration */:
                     return emitEnumDeclaration(node);
-                case 225 /* ModuleDeclaration */:
+                case 233 /* ModuleDeclaration */:
                     return emitModuleDeclaration(node);
-                case 226 /* ModuleBlock */:
+                case 234 /* ModuleBlock */:
                     return emitModuleBlock(node);
-                case 227 /* CaseBlock */:
+                case 235 /* CaseBlock */:
                     return emitCaseBlock(node);
-                case 229 /* ImportEqualsDeclaration */:
+                case 236 /* NamespaceExportDeclaration */:
+                    return emitNamespaceExportDeclaration(node);
+                case 237 /* ImportEqualsDeclaration */:
                     return emitImportEqualsDeclaration(node);
-                case 230 /* ImportDeclaration */:
+                case 238 /* ImportDeclaration */:
                     return emitImportDeclaration(node);
-                case 231 /* ImportClause */:
+                case 239 /* ImportClause */:
                     return emitImportClause(node);
-                case 232 /* NamespaceImport */:
+                case 240 /* NamespaceImport */:
                     return emitNamespaceImport(node);
-                case 233 /* NamedImports */:
+                case 241 /* NamedImports */:
                     return emitNamedImports(node);
-                case 234 /* ImportSpecifier */:
+                case 242 /* ImportSpecifier */:
                     return emitImportSpecifier(node);
-                case 235 /* ExportAssignment */:
+                case 243 /* ExportAssignment */:
                     return emitExportAssignment(node);
-                case 236 /* ExportDeclaration */:
+                case 244 /* ExportDeclaration */:
                     return emitExportDeclaration(node);
-                case 237 /* NamedExports */:
+                case 245 /* NamedExports */:
                     return emitNamedExports(node);
-                case 238 /* ExportSpecifier */:
+                case 246 /* ExportSpecifier */:
                     return emitExportSpecifier(node);
-                case 239 /* MissingDeclaration */:
+                case 247 /* MissingDeclaration */:
                     return;
                 // Module references
-                case 240 /* ExternalModuleReference */:
+                case 248 /* ExternalModuleReference */:
                     return emitExternalModuleReference(node);
                 // JSX (non-expression)
-                case 244 /* JsxText */:
+                case 10 /* JsxText */:
                     return emitJsxText(node);
-                case 243 /* JsxOpeningElement */:
+                case 251 /* JsxOpeningElement */:
                     return emitJsxOpeningElement(node);
-                case 245 /* JsxClosingElement */:
+                case 252 /* JsxClosingElement */:
                     return emitJsxClosingElement(node);
-                case 246 /* JsxAttribute */:
+                case 253 /* JsxAttribute */:
                     return emitJsxAttribute(node);
-                case 247 /* JsxSpreadAttribute */:
+                case 254 /* JsxAttributes */:
+                    return emitJsxAttributes(node);
+                case 255 /* JsxSpreadAttribute */:
                     return emitJsxSpreadAttribute(node);
-                case 248 /* JsxExpression */:
+                case 256 /* JsxExpression */:
                     return emitJsxExpression(node);
                 // Clauses
-                case 249 /* CaseClause */:
+                case 257 /* CaseClause */:
                     return emitCaseClause(node);
-                case 250 /* DefaultClause */:
+                case 258 /* DefaultClause */:
                     return emitDefaultClause(node);
-                case 251 /* HeritageClause */:
+                case 259 /* HeritageClause */:
                     return emitHeritageClause(node);
-                case 252 /* CatchClause */:
+                case 260 /* CatchClause */:
                     return emitCatchClause(node);
                 // Property assignments
-                case 253 /* PropertyAssignment */:
+                case 261 /* PropertyAssignment */:
                     return emitPropertyAssignment(node);
-                case 254 /* ShorthandPropertyAssignment */:
+                case 262 /* ShorthandPropertyAssignment */:
                     return emitShorthandPropertyAssignment(node);
+                case 263 /* SpreadAssignment */:
+                    return emitSpreadAssignment(node);
                 // Enum
-                case 255 /* EnumMember */:
+                case 264 /* EnumMember */:
                     return emitEnumMember(node);
             }
             // If the node is an expression, try to emit it as an expression with
             // substitution.
             if (ts.isExpression(node)) {
-                return pipelineEmitWithSubstitution(1 /* Expression */, node);
+                return pipelineEmitExpression(trySubstituteNode(1 /* Expression */, node));
+            }
+            if (ts.isToken(node)) {
+                writeTokenNode(node);
+                return;
             }
         }
-        /**
-         * Emits a node in the Expression EmitContext.
-         *
-         * NOTE: Do not call this method directly. It is part of the emit pipeline
-         * and should only be called indirectly from pipelineEmitForContext.
-         */
-        function pipelineEmitInExpressionContext(node) {
+        function pipelineEmitExpression(node) {
             var kind = node.kind;
             switch (kind) {
                 // Literals
                 case 8 /* NumericLiteral */:
                     return emitNumericLiteral(node);
                 case 9 /* StringLiteral */:
-                case 10 /* RegularExpressionLiteral */:
-                case 11 /* NoSubstitutionTemplateLiteral */:
+                case 12 /* RegularExpressionLiteral */:
+                case 13 /* NoSubstitutionTemplateLiteral */:
                     return emitLiteral(node);
                 // Identifiers
-                case 69 /* Identifier */:
+                case 71 /* Identifier */:
                     return emitIdentifier(node);
                 // Reserved words
-                case 84 /* FalseKeyword */:
-                case 93 /* NullKeyword */:
-                case 95 /* SuperKeyword */:
-                case 99 /* TrueKeyword */:
-                case 97 /* ThisKeyword */:
-                    writeTokenText(kind);
+                case 86 /* FalseKeyword */:
+                case 95 /* NullKeyword */:
+                case 97 /* SuperKeyword */:
+                case 101 /* TrueKeyword */:
+                case 99 /* ThisKeyword */:
+                case 91 /* ImportKeyword */:
+                    writeTokenNode(node);
                     return;
                 // Expressions
-                case 170 /* ArrayLiteralExpression */:
+                case 177 /* ArrayLiteralExpression */:
                     return emitArrayLiteralExpression(node);
-                case 171 /* ObjectLiteralExpression */:
+                case 178 /* ObjectLiteralExpression */:
                     return emitObjectLiteralExpression(node);
-                case 172 /* PropertyAccessExpression */:
+                case 179 /* PropertyAccessExpression */:
                     return emitPropertyAccessExpression(node);
-                case 173 /* ElementAccessExpression */:
+                case 180 /* ElementAccessExpression */:
                     return emitElementAccessExpression(node);
-                case 174 /* CallExpression */:
+                case 181 /* CallExpression */:
                     return emitCallExpression(node);
-                case 175 /* NewExpression */:
+                case 182 /* NewExpression */:
                     return emitNewExpression(node);
-                case 176 /* TaggedTemplateExpression */:
+                case 183 /* TaggedTemplateExpression */:
                     return emitTaggedTemplateExpression(node);
-                case 177 /* TypeAssertionExpression */:
+                case 184 /* TypeAssertionExpression */:
                     return emitTypeAssertionExpression(node);
-                case 178 /* ParenthesizedExpression */:
+                case 185 /* ParenthesizedExpression */:
                     return emitParenthesizedExpression(node);
-                case 179 /* FunctionExpression */:
+                case 186 /* FunctionExpression */:
                     return emitFunctionExpression(node);
-                case 180 /* ArrowFunction */:
+                case 187 /* ArrowFunction */:
                     return emitArrowFunction(node);
-                case 181 /* DeleteExpression */:
+                case 188 /* DeleteExpression */:
                     return emitDeleteExpression(node);
-                case 182 /* TypeOfExpression */:
+                case 189 /* TypeOfExpression */:
                     return emitTypeOfExpression(node);
-                case 183 /* VoidExpression */:
+                case 190 /* VoidExpression */:
                     return emitVoidExpression(node);
-                case 184 /* AwaitExpression */:
+                case 191 /* AwaitExpression */:
                     return emitAwaitExpression(node);
-                case 185 /* PrefixUnaryExpression */:
+                case 192 /* PrefixUnaryExpression */:
                     return emitPrefixUnaryExpression(node);
-                case 186 /* PostfixUnaryExpression */:
+                case 193 /* PostfixUnaryExpression */:
                     return emitPostfixUnaryExpression(node);
-                case 187 /* BinaryExpression */:
+                case 194 /* BinaryExpression */:
                     return emitBinaryExpression(node);
-                case 188 /* ConditionalExpression */:
+                case 195 /* ConditionalExpression */:
                     return emitConditionalExpression(node);
-                case 189 /* TemplateExpression */:
+                case 196 /* TemplateExpression */:
                     return emitTemplateExpression(node);
-                case 190 /* YieldExpression */:
+                case 197 /* YieldExpression */:
                     return emitYieldExpression(node);
-                case 191 /* SpreadElementExpression */:
-                    return emitSpreadElementExpression(node);
-                case 192 /* ClassExpression */:
+                case 198 /* SpreadElement */:
+                    return emitSpreadExpression(node);
+                case 199 /* ClassExpression */:
                     return emitClassExpression(node);
-                case 193 /* OmittedExpression */:
+                case 200 /* OmittedExpression */:
                     return;
-                case 195 /* AsExpression */:
+                case 202 /* AsExpression */:
                     return emitAsExpression(node);
-                case 196 /* NonNullExpression */:
+                case 203 /* NonNullExpression */:
                     return emitNonNullExpression(node);
+                case 204 /* MetaProperty */:
+                    return emitMetaProperty(node);
                 // JSX
-                case 241 /* JsxElement */:
+                case 249 /* JsxElement */:
                     return emitJsxElement(node);
-                case 242 /* JsxSelfClosingElement */:
+                case 250 /* JsxSelfClosingElement */:
                     return emitJsxSelfClosingElement(node);
                 // Transformation nodes
-                case 288 /* PartiallyEmittedExpression */:
+                case 297 /* PartiallyEmittedExpression */:
                     return emitPartiallyEmittedExpression(node);
+                case 298 /* CommaListExpression */:
+                    return emitCommaList(node);
+            }
+        }
+        function trySubstituteNode(hint, node) {
+            return node && substituteNode && substituteNode(hint, node) || node;
+        }
+        function emitHelpersIndirect(node) {
+            if (onEmitHelpers) {
+                onEmitHelpers(node, writeLines);
             }
         }
         //
@@ -57199,9 +68912,6 @@ var ts;
         // SyntaxKind.NumericLiteral
         function emitNumericLiteral(node) {
             emitLiteral(node);
-            if (node.trailingComment) {
-                write(" /*" + node.trailingComment + "*/");
-            }
         }
         // SyntaxKind.StringLiteral
         // SyntaxKind.RegularExpressionLiteral
@@ -57211,7 +68921,7 @@ var ts;
         // SyntaxKind.TemplateTail
         function emitLiteral(node) {
             var text = getLiteralTextOfNode(node);
-            if ((compilerOptions.sourceMap || compilerOptions.inlineSourceMap)
+            if ((printerOptions.sourceMap || printerOptions.inlineSourceMap)
                 && (node.kind === 9 /* StringLiteral */ || ts.isTemplateLiteralKind(node.kind))) {
                 writer.writeLiteral(text);
             }
@@ -57223,12 +68933,8 @@ var ts;
         // Identifiers
         //
         function emitIdentifier(node) {
-            if (ts.getEmitFlags(node) & 16 /* UMDDefine */) {
-                writeLines(umdHelper);
-            }
-            else {
-                write(getTextOfNode(node, /*includeTrivia*/ false));
-            }
+            write(getTextOfNode(node, /*includeTrivia*/ false));
+            emitTypeArguments(node, node.typeArguments);
         }
         //
         // Names
@@ -57239,7 +68945,7 @@ var ts;
             emit(node.right);
         }
         function emitEntityName(node) {
-            if (node.kind === 69 /* Identifier */) {
+            if (node.kind === 71 /* Identifier */) {
                 emitExpression(node);
             }
             else {
@@ -57257,6 +68963,7 @@ var ts;
         function emitTypeParameter(node) {
             emit(node.name);
             emitWithPrefix(" extends ", node.constraint);
+            emitWithPrefix(" = ", node.default);
         }
         function emitParameter(node) {
             emitDecorators(node, node.decorators);
@@ -57264,8 +68971,8 @@ var ts;
             writeIfPresent(node.dotDotDotToken, "...");
             emit(node.name);
             writeIfPresent(node.questionToken, "?");
-            emitExpressionWithPrefix(" = ", node.initializer);
             emitWithPrefix(": ", node.type);
+            emitExpressionWithPrefix(" = ", node.initializer);
         }
         function emitDecorator(decorator) {
             write("@");
@@ -57286,6 +68993,7 @@ var ts;
             emitDecorators(node, node.decorators);
             emitModifiers(node, node.modifiers);
             emit(node.name);
+            writeIfPresent(node.questionToken, "?");
             emitWithPrefix(": ", node.type);
             emitExpressionWithPrefix(" = ", node.initializer);
             write(";");
@@ -57305,6 +69013,7 @@ var ts;
             emitModifiers(node, node.modifiers);
             writeIfPresent(node.asteriskToken, "*");
             emit(node.name);
+            writeIfPresent(node.questionToken, "?");
             emitSignatureAndBody(node, emitSignatureHead);
         }
         function emitConstructor(node) {
@@ -57315,7 +69024,7 @@ var ts;
         function emitAccessorDeclaration(node) {
             emitDecorators(node, node.decorators);
             emitModifiers(node, node.modifiers);
-            write(node.kind === 149 /* GetAccessor */ ? "get " : "set ");
+            write(node.kind === 153 /* GetAccessor */ ? "get " : "set ");
             emit(node.name);
             emitSignatureAndBody(node, emitSignatureHead);
         }
@@ -57343,7 +69052,7 @@ var ts;
             emitWithPrefix(": ", node.type);
             write(";");
         }
-        function emitSemicolonClassElement(node) {
+        function emitSemicolonClassElement() {
             write(";");
         }
         //
@@ -57367,7 +69076,7 @@ var ts;
         function emitConstructorType(node) {
             write("new ");
             emitTypeParameters(node, node.typeParameters);
-            emitParametersForArrow(node, node.parameters);
+            emitParameters(node, node.parameters);
             write(" => ");
             emit(node.type);
         }
@@ -57377,7 +69086,10 @@ var ts;
         }
         function emitTypeLiteral(node) {
             write("{");
-            emitList(node, node.members, 65 /* TypeLiteralMembers */);
+            // If the literal is empty, do not add spaces between braces.
+            if (node.members.length > 0) {
+                emitList(node, node.members, ts.getEmitFlags(node) & 1 /* SingleLine */ ? 448 /* SingleLineTypeLiteralMembers */ : 65 /* MultiLineTypeLiteralMembers */);
+            }
             write("}");
         }
         function emitArrayType(node) {
@@ -57400,9 +69112,49 @@ var ts;
             emit(node.type);
             write(")");
         }
-        function emitThisType(node) {
+        function emitThisType() {
             write("this");
         }
+        function emitTypeOperator(node) {
+            writeTokenText(node.operator);
+            write(" ");
+            emit(node.type);
+        }
+        function emitIndexedAccessType(node) {
+            emit(node.objectType);
+            write("[");
+            emit(node.indexType);
+            write("]");
+        }
+        function emitMappedType(node) {
+            var emitFlags = ts.getEmitFlags(node);
+            write("{");
+            if (emitFlags & 1 /* SingleLine */) {
+                write(" ");
+            }
+            else {
+                writeLine();
+                increaseIndent();
+            }
+            writeIfPresent(node.readonlyToken, "readonly ");
+            write("[");
+            emit(node.typeParameter.name);
+            write(" in ");
+            emit(node.typeParameter.constraint);
+            write("]");
+            writeIfPresent(node.questionToken, "?");
+            write(": ");
+            emit(node.type);
+            write(";");
+            if (emitFlags & 1 /* SingleLine */) {
+                write(" ");
+            }
+            else {
+                writeLine();
+                decreaseIndent();
+            }
+            write("}");
+        }
         function emitLiteralType(node) {
             emitExpression(node.literal);
         }
@@ -57456,12 +69208,12 @@ var ts;
                 write("{}");
             }
             else {
-                var indentedFlag = ts.getEmitFlags(node) & 524288 /* Indented */;
+                var indentedFlag = ts.getEmitFlags(node) & 65536 /* Indented */;
                 if (indentedFlag) {
                     increaseIndent();
                 }
                 var preferNewLine = node.multiLine ? 32768 /* PreferNewLine */ : 0 /* None */;
-                var allowTrailingComma = languageVersion >= 1 /* ES5 */ ? 32 /* AllowTrailingComma */ : 0 /* None */;
+                var allowTrailingComma = currentSourceFile.languageVersion >= 1 /* ES5 */ ? 32 /* AllowTrailingComma */ : 0 /* None */;
                 emitList(node, properties, 978 /* ObjectLiteralExpressionProperties */ | allowTrailingComma | preferNewLine);
                 if (indentedFlag) {
                     decreaseIndent();
@@ -57471,10 +69223,10 @@ var ts;
         function emitPropertyAccessExpression(node) {
             var indentBeforeDot = false;
             var indentAfterDot = false;
-            if (!(ts.getEmitFlags(node) & 1048576 /* NoIndentation */)) {
+            if (!(ts.getEmitFlags(node) & 131072 /* NoIndentation */)) {
                 var dotRangeStart = node.expression.end;
-                var dotRangeEnd = ts.skipTrivia(currentText, node.expression.end) + 1;
-                var dotToken = { kind: 21 /* DotToken */, pos: dotRangeStart, end: dotRangeEnd };
+                var dotRangeEnd = ts.skipTrivia(currentSourceFile.text, node.expression.end) + 1;
+                var dotToken = { kind: 23 /* DotToken */, pos: dotRangeStart, end: dotRangeEnd };
                 indentBeforeDot = needsIndentation(node, node.expression, dotToken);
                 indentAfterDot = needsIndentation(node, dotToken, node.name);
             }
@@ -57489,18 +69241,20 @@ var ts;
         // 1..toString is a valid property access, emit a dot after the literal
         // Also emit a dot if expression is a integer const enum value - it will appear in generated code as numeric literal
         function needsDotDotForPropertyAccess(expression) {
-            if (expression.kind === 8 /* NumericLiteral */) {
-                // check if numeric literal was originally written with a dot
+            expression = ts.skipPartiallyEmittedExpressions(expression);
+            if (ts.isNumericLiteral(expression)) {
+                // check if numeric literal is a decimal literal that was originally written with a dot
                 var text = getLiteralTextOfNode(expression);
-                return text.indexOf(ts.tokenToString(21 /* DotToken */)) < 0;
+                return !expression.numericLiteralFlags
+                    && text.indexOf(ts.tokenToString(23 /* DotToken */)) < 0;
             }
             else if (ts.isPropertyAccessExpression(expression) || ts.isElementAccessExpression(expression)) {
                 // check if constant enum value is integer
                 var constantValue = ts.getConstantValue(expression);
                 // isFinite handles cases when constantValue is undefined
-                return isFinite(constantValue)
+                return typeof constantValue === "number" && isFinite(constantValue)
                     && Math.floor(constantValue) === constantValue
-                    && compilerOptions.removeComments;
+                    && printerOptions.removeComments;
             }
         }
         function emitElementAccessExpression(node) {
@@ -57511,11 +69265,13 @@ var ts;
         }
         function emitCallExpression(node) {
             emitExpression(node.expression);
+            emitTypeArguments(node, node.typeArguments);
             emitExpressionList(node, node.arguments, 1296 /* CallExpressionArguments */);
         }
         function emitNewExpression(node) {
             write("new ");
             emitExpression(node.expression);
+            emitTypeArguments(node, node.typeArguments);
             emitExpressionList(node, node.arguments, 9488 /* NewExpressionArguments */);
         }
         function emitTaggedTemplateExpression(node) {
@@ -57524,11 +69280,9 @@ var ts;
             emitExpression(node.template);
         }
         function emitTypeAssertionExpression(node) {
-            if (node.type) {
-                write("<");
-                emit(node.type);
-                write(">");
-            }
+            write("<");
+            emit(node.type);
+            write(">");
             emitExpression(node.expression);
         }
         function emitParenthesizedExpression(node) {
@@ -57587,21 +69341,21 @@ var ts;
             // expression a prefix increment whose operand is a plus expression - (++(+x))
             // The same is true of minus of course.
             var operand = node.operand;
-            return operand.kind === 185 /* PrefixUnaryExpression */
-                && ((node.operator === 35 /* PlusToken */ && (operand.operator === 35 /* PlusToken */ || operand.operator === 41 /* PlusPlusToken */))
-                    || (node.operator === 36 /* MinusToken */ && (operand.operator === 36 /* MinusToken */ || operand.operator === 42 /* MinusMinusToken */)));
+            return operand.kind === 192 /* PrefixUnaryExpression */
+                && ((node.operator === 37 /* PlusToken */ && (operand.operator === 37 /* PlusToken */ || operand.operator === 43 /* PlusPlusToken */))
+                    || (node.operator === 38 /* MinusToken */ && (operand.operator === 38 /* MinusToken */ || operand.operator === 44 /* MinusMinusToken */)));
         }
         function emitPostfixUnaryExpression(node) {
             emitExpression(node.operand);
             writeTokenText(node.operator);
         }
         function emitBinaryExpression(node) {
-            var isCommaOperator = node.operatorToken.kind !== 24 /* CommaToken */;
+            var isCommaOperator = node.operatorToken.kind !== 26 /* CommaToken */;
             var indentBeforeOperator = needsIndentation(node, node.left, node.operatorToken);
             var indentAfterOperator = needsIndentation(node, node.operatorToken, node.right);
             emitExpression(node.left);
             increaseIndentIf(indentBeforeOperator, isCommaOperator ? " " : undefined);
-            writeTokenText(node.operatorToken.kind);
+            writeTokenNode(node.operatorToken);
             increaseIndentIf(indentAfterOperator, " ");
             emitExpression(node.right);
             decreaseIndentIf(indentBeforeOperator, indentAfterOperator);
@@ -57631,7 +69385,7 @@ var ts;
             write(node.asteriskToken ? "yield*" : "yield");
             emitExpressionWithPrefix(" ", node.expression);
         }
-        function emitSpreadElementExpression(node) {
+        function emitSpreadExpression(node) {
             write("...");
             emitExpression(node.expression);
         }
@@ -57653,6 +69407,11 @@ var ts;
             emitExpression(node.expression);
             write("!");
         }
+        function emitMetaProperty(node) {
+            writeToken(node.keywordToken, node.pos);
+            write(".");
+            emit(node.name);
+        }
         //
         // Misc
         //
@@ -57663,20 +69422,24 @@ var ts;
         //
         // Statements
         //
-        function emitBlock(node, format) {
+        function emitBlock(node) {
             if (isSingleLineEmptyBlock(node)) {
-                writeToken(15 /* OpenBraceToken */, node.pos, /*contextNode*/ node);
+                writeToken(17 /* OpenBraceToken */, node.pos, /*contextNode*/ node);
                 write(" ");
-                writeToken(16 /* CloseBraceToken */, node.statements.end, /*contextNode*/ node);
+                writeToken(18 /* CloseBraceToken */, node.statements.end, /*contextNode*/ node);
             }
             else {
-                writeToken(15 /* OpenBraceToken */, node.pos, /*contextNode*/ node);
+                writeToken(17 /* OpenBraceToken */, node.pos, /*contextNode*/ node);
                 emitBlockStatements(node);
-                writeToken(16 /* CloseBraceToken */, node.statements.end, /*contextNode*/ node);
+                // We have to call emitLeadingComments explicitly here because otherwise leading comments of the close brace token will not be emitted
+                increaseIndent();
+                emitLeadingCommentsOfPosition(node.statements.end);
+                decreaseIndent();
+                writeToken(18 /* CloseBraceToken */, node.statements.end, /*contextNode*/ node);
             }
         }
         function emitBlockStatements(node) {
-            if (ts.getEmitFlags(node) & 32 /* SingleLine */) {
+            if (ts.getEmitFlags(node) & 1 /* SingleLine */) {
                 emitList(node, node.statements, 384 /* SingleLineBlockStatements */);
             }
             else {
@@ -57688,7 +69451,7 @@ var ts;
             emit(node.declarationList);
             write(";");
         }
-        function emitEmptyStatement(node) {
+        function emitEmptyStatement() {
             write(";");
         }
         function emitExpressionStatement(node) {
@@ -57696,32 +69459,32 @@ var ts;
             write(";");
         }
         function emitIfStatement(node) {
-            var openParenPos = writeToken(88 /* IfKeyword */, node.pos, node);
+            var openParenPos = writeToken(90 /* IfKeyword */, node.pos, node);
             write(" ");
-            writeToken(17 /* OpenParenToken */, openParenPos, node);
+            writeToken(19 /* OpenParenToken */, openParenPos, node);
             emitExpression(node.expression);
-            writeToken(18 /* CloseParenToken */, node.expression.end, node);
-            emitEmbeddedStatement(node.thenStatement);
+            writeToken(20 /* CloseParenToken */, node.expression.end, node);
+            emitEmbeddedStatement(node, node.thenStatement);
             if (node.elseStatement) {
-                writeLine();
-                writeToken(80 /* ElseKeyword */, node.thenStatement.end, node);
-                if (node.elseStatement.kind === 203 /* IfStatement */) {
+                writeLineOrSpace(node);
+                writeToken(82 /* ElseKeyword */, node.thenStatement.end, node);
+                if (node.elseStatement.kind === 211 /* IfStatement */) {
                     write(" ");
                     emit(node.elseStatement);
                 }
                 else {
-                    emitEmbeddedStatement(node.elseStatement);
+                    emitEmbeddedStatement(node, node.elseStatement);
                 }
             }
         }
         function emitDoStatement(node) {
             write("do");
-            emitEmbeddedStatement(node.statement);
+            emitEmbeddedStatement(node, node.statement);
             if (ts.isBlock(node.statement)) {
                 write(" ");
             }
             else {
-                writeLine();
+                writeLineOrSpace(node);
             }
             write("while (");
             emitExpression(node.expression);
@@ -57731,43 +69494,44 @@ var ts;
             write("while (");
             emitExpression(node.expression);
             write(")");
-            emitEmbeddedStatement(node.statement);
+            emitEmbeddedStatement(node, node.statement);
         }
         function emitForStatement(node) {
-            var openParenPos = writeToken(86 /* ForKeyword */, node.pos);
+            var openParenPos = writeToken(88 /* ForKeyword */, node.pos);
             write(" ");
-            writeToken(17 /* OpenParenToken */, openParenPos, /*contextNode*/ node);
+            writeToken(19 /* OpenParenToken */, openParenPos, /*contextNode*/ node);
             emitForBinding(node.initializer);
             write(";");
             emitExpressionWithPrefix(" ", node.condition);
             write(";");
             emitExpressionWithPrefix(" ", node.incrementor);
             write(")");
-            emitEmbeddedStatement(node.statement);
+            emitEmbeddedStatement(node, node.statement);
         }
         function emitForInStatement(node) {
-            var openParenPos = writeToken(86 /* ForKeyword */, node.pos);
+            var openParenPos = writeToken(88 /* ForKeyword */, node.pos);
             write(" ");
-            writeToken(17 /* OpenParenToken */, openParenPos);
+            writeToken(19 /* OpenParenToken */, openParenPos);
             emitForBinding(node.initializer);
             write(" in ");
             emitExpression(node.expression);
-            writeToken(18 /* CloseParenToken */, node.expression.end);
-            emitEmbeddedStatement(node.statement);
+            writeToken(20 /* CloseParenToken */, node.expression.end);
+            emitEmbeddedStatement(node, node.statement);
         }
         function emitForOfStatement(node) {
-            var openParenPos = writeToken(86 /* ForKeyword */, node.pos);
+            var openParenPos = writeToken(88 /* ForKeyword */, node.pos);
             write(" ");
-            writeToken(17 /* OpenParenToken */, openParenPos);
+            emitWithSuffix(node.awaitModifier, " ");
+            writeToken(19 /* OpenParenToken */, openParenPos);
             emitForBinding(node.initializer);
             write(" of ");
             emitExpression(node.expression);
-            writeToken(18 /* CloseParenToken */, node.expression.end);
-            emitEmbeddedStatement(node.statement);
+            writeToken(20 /* CloseParenToken */, node.expression.end);
+            emitEmbeddedStatement(node, node.statement);
         }
         function emitForBinding(node) {
             if (node !== undefined) {
-                if (node.kind === 219 /* VariableDeclarationList */) {
+                if (node.kind === 227 /* VariableDeclarationList */) {
                     emit(node);
                 }
                 else {
@@ -57776,17 +69540,17 @@ var ts;
             }
         }
         function emitContinueStatement(node) {
-            writeToken(75 /* ContinueKeyword */, node.pos);
+            writeToken(77 /* ContinueKeyword */, node.pos);
             emitWithPrefix(" ", node.label);
             write(";");
         }
         function emitBreakStatement(node) {
-            writeToken(70 /* BreakKeyword */, node.pos);
+            writeToken(72 /* BreakKeyword */, node.pos);
             emitWithPrefix(" ", node.label);
             write(";");
         }
         function emitReturnStatement(node) {
-            writeToken(94 /* ReturnKeyword */, node.pos, /*contextNode*/ node);
+            writeToken(96 /* ReturnKeyword */, node.pos, /*contextNode*/ node);
             emitExpressionWithPrefix(" ", node.expression);
             write(";");
         }
@@ -57794,14 +69558,14 @@ var ts;
             write("with (");
             emitExpression(node.expression);
             write(")");
-            emitEmbeddedStatement(node.statement);
+            emitEmbeddedStatement(node, node.statement);
         }
         function emitSwitchStatement(node) {
-            var openParenPos = writeToken(96 /* SwitchKeyword */, node.pos);
+            var openParenPos = writeToken(98 /* SwitchKeyword */, node.pos);
             write(" ");
-            writeToken(17 /* OpenParenToken */, openParenPos);
+            writeToken(19 /* OpenParenToken */, openParenPos);
             emitExpression(node.expression);
-            writeToken(18 /* CloseParenToken */, node.expression.end);
+            writeToken(20 /* CloseParenToken */, node.expression.end);
             write(" ");
             emit(node.caseBlock);
         }
@@ -57818,15 +69582,18 @@ var ts;
         function emitTryStatement(node) {
             write("try ");
             emit(node.tryBlock);
-            emit(node.catchClause);
+            if (node.catchClause) {
+                writeLineOrSpace(node);
+                emit(node.catchClause);
+            }
             if (node.finallyBlock) {
-                writeLine();
+                writeLineOrSpace(node);
                 write("finally ");
                 emit(node.finallyBlock);
             }
         }
         function emitDebuggerStatement(node) {
-            writeToken(76 /* DebuggerKeyword */, node.pos);
+            writeToken(78 /* DebuggerKeyword */, node.pos);
             write(";");
         }
         //
@@ -57834,6 +69601,7 @@ var ts;
         //
         function emitVariableDeclaration(node) {
             emit(node.name);
+            emitWithPrefix(": ", node.type);
             emitExpressionWithPrefix(" = ", node.initializer);
         }
         function emitVariableDeclarationList(node) {
@@ -57850,24 +69618,36 @@ var ts;
             emitIdentifierName(node.name);
             emitSignatureAndBody(node, emitSignatureHead);
         }
+        function emitBlockCallback(_hint, body) {
+            emitBlockFunctionBody(body);
+        }
         function emitSignatureAndBody(node, emitSignatureHead) {
             var body = node.body;
             if (body) {
                 if (ts.isBlock(body)) {
-                    var indentedFlag = ts.getEmitFlags(node) & 524288 /* Indented */;
+                    var indentedFlag = ts.getEmitFlags(node) & 65536 /* Indented */;
                     if (indentedFlag) {
                         increaseIndent();
                     }
-                    if (ts.getEmitFlags(node) & 4194304 /* ReuseTempVariableScope */) {
+                    if (ts.getEmitFlags(node) & 524288 /* ReuseTempVariableScope */) {
                         emitSignatureHead(node);
-                        emitBlockFunctionBody(node, body);
+                        if (onEmitNode) {
+                            onEmitNode(3 /* Unspecified */, body, emitBlockCallback);
+                        }
+                        else {
+                            emitBlockFunctionBody(body);
+                        }
                     }
                     else {
-                        var savedTempFlags = tempFlags;
-                        tempFlags = 0;
+                        pushNameGenerationScope();
                         emitSignatureHead(node);
-                        emitBlockFunctionBody(node, body);
-                        tempFlags = savedTempFlags;
+                        if (onEmitNode) {
+                            onEmitNode(3 /* Unspecified */, body, emitBlockCallback);
+                        }
+                        else {
+                            emitBlockFunctionBody(body);
+                        }
+                        popNameGenerationScope();
                     }
                     if (indentedFlag) {
                         decreaseIndent();
@@ -57889,14 +69669,14 @@ var ts;
             emitParameters(node, node.parameters);
             emitWithPrefix(": ", node.type);
         }
-        function shouldEmitBlockFunctionBodyOnSingleLine(parentNode, body) {
+        function shouldEmitBlockFunctionBodyOnSingleLine(body) {
             // We must emit a function body as a single-line body in the following case:
             // * The body has NodeEmitFlags.SingleLine specified.
             // We must emit a function body as a multi-line body in the following cases:
             // * The body is explicitly marked as multi-line.
             // * A non-synthesized body's start and end position are on different lines.
             // * Any statement in the body starts on a new line.
-            if (ts.getEmitFlags(body) & 32 /* SingleLine */) {
+            if (ts.getEmitFlags(body) & 1 /* SingleLine */) {
                 return true;
             }
             if (body.multiLine) {
@@ -57919,14 +69699,20 @@ var ts;
             }
             return true;
         }
-        function emitBlockFunctionBody(parentNode, body) {
+        function emitBlockFunctionBody(body) {
             write(" {");
             increaseIndent();
-            emitBodyWithDetachedComments(body, body.statements, shouldEmitBlockFunctionBodyOnSingleLine(parentNode, body)
+            var emitBlockFunctionBody = shouldEmitBlockFunctionBodyOnSingleLine(body)
                 ? emitBlockFunctionBodyOnSingleLine
-                : emitBlockFunctionBodyWorker);
+                : emitBlockFunctionBodyWorker;
+            if (emitBodyWithDetachedComments) {
+                emitBodyWithDetachedComments(body, body.statements, emitBlockFunctionBody);
+            }
+            else {
+                emitBlockFunctionBody(body);
+            }
             decreaseIndent();
-            writeToken(16 /* CloseBraceToken */, body.statements.end, body);
+            writeToken(18 /* CloseBraceToken */, body.statements.end, body);
         }
         function emitBlockFunctionBodyOnSingleLine(body) {
             emitBlockFunctionBodyWorker(body, /*emitBlockFunctionBodyOnSingleLine*/ true);
@@ -57934,8 +69720,9 @@ var ts;
         function emitBlockFunctionBodyWorker(body, emitBlockFunctionBodyOnSingleLine) {
             // Emit all the prologue directives (like "use strict").
             var statementOffset = emitPrologueDirectives(body.statements, /*startWithNewLine*/ true);
-            var helpersEmitted = emitHelpers(body);
-            if (statementOffset === 0 && !helpersEmitted && emitBlockFunctionBodyOnSingleLine) {
+            var pos = writer.getTextPos();
+            emitHelpersIndirect(body);
+            if (statementOffset === 0 && pos === writer.getTextPos() && emitBlockFunctionBodyOnSingleLine) {
                 decreaseIndent();
                 emitList(body, body.statements, 384 /* SingleLineFunctionBodyStatements */);
                 increaseIndent();
@@ -57952,21 +69739,20 @@ var ts;
             emitModifiers(node, node.modifiers);
             write("class");
             emitNodeWithPrefix(" ", node.name, emitIdentifierName);
-            var indentedFlag = ts.getEmitFlags(node) & 524288 /* Indented */;
+            var indentedFlag = ts.getEmitFlags(node) & 65536 /* Indented */;
             if (indentedFlag) {
                 increaseIndent();
             }
             emitTypeParameters(node, node.typeParameters);
             emitList(node, node.heritageClauses, 256 /* ClassHeritageClauses */);
-            var savedTempFlags = tempFlags;
-            tempFlags = 0;
+            pushNameGenerationScope();
             write(" {");
             emitList(node, node.members, 65 /* ClassMembers */);
             write("}");
+            popNameGenerationScope();
             if (indentedFlag) {
                 decreaseIndent();
             }
-            tempFlags = savedTempFlags;
         }
         function emitInterfaceDeclaration(node) {
             emitDecorators(node, node.decorators);
@@ -57993,19 +69779,18 @@ var ts;
             emitModifiers(node, node.modifiers);
             write("enum ");
             emit(node.name);
-            var savedTempFlags = tempFlags;
-            tempFlags = 0;
+            pushNameGenerationScope();
             write(" {");
             emitList(node, node.members, 81 /* EnumMembers */);
             write("}");
-            tempFlags = savedTempFlags;
+            popNameGenerationScope();
         }
         function emitModuleDeclaration(node) {
             emitModifiers(node, node.modifiers);
             write(node.flags & 16 /* Namespace */ ? "namespace " : "module ");
             emit(node.name);
             var body = node.body;
-            while (body.kind === 225 /* ModuleDeclaration */) {
+            while (body.kind === 233 /* ModuleDeclaration */) {
                 write(".");
                 emit(body.name);
                 body = body.body;
@@ -58014,23 +69799,21 @@ var ts;
             emit(body);
         }
         function emitModuleBlock(node) {
-            if (isSingleLineEmptyBlock(node)) {
+            if (isEmptyBlock(node)) {
                 write("{ }");
             }
             else {
-                var savedTempFlags = tempFlags;
-                tempFlags = 0;
+                pushNameGenerationScope();
                 write("{");
-                increaseIndent();
                 emitBlockStatements(node);
                 write("}");
-                tempFlags = savedTempFlags;
+                popNameGenerationScope();
             }
         }
         function emitCaseBlock(node) {
-            writeToken(15 /* OpenBraceToken */, node.pos);
+            writeToken(17 /* OpenBraceToken */, node.pos);
             emitList(node, node.clauses, 65 /* CaseBlockClauses */);
-            writeToken(16 /* CloseBraceToken */, node.clauses.end);
+            writeToken(18 /* CloseBraceToken */, node.clauses.end);
         }
         function emitImportEqualsDeclaration(node) {
             emitModifiers(node, node.modifiers);
@@ -58041,7 +69824,7 @@ var ts;
             write(";");
         }
         function emitModuleReference(node) {
-            if (node.kind === 69 /* Identifier */) {
+            if (node.kind === 71 /* Identifier */) {
                 emitExpression(node);
             }
             else {
@@ -58094,6 +69877,11 @@ var ts;
             }
             write(";");
         }
+        function emitNamespaceExportDeclaration(node) {
+            write("export as namespace ");
+            emit(node.name);
+            write(";");
+        }
         function emitNamedExports(node) {
             emitNamedImportsOrExports(node);
         }
@@ -58132,14 +69920,20 @@ var ts;
             write("<");
             emitJsxTagName(node.tagName);
             write(" ");
-            emitList(node, node.attributes, 131328 /* JsxElementAttributes */);
+            // We are checking here so we won't re-enter the emiting pipeline and emit extra sourcemap
+            if (node.attributes.properties && node.attributes.properties.length > 0) {
+                emit(node.attributes);
+            }
             write("/>");
         }
         function emitJsxOpeningElement(node) {
             write("<");
             emitJsxTagName(node.tagName);
-            writeIfAny(node.attributes, " ");
-            emitList(node, node.attributes, 131328 /* JsxElementAttributes */);
+            writeIfAny(node.attributes.properties, " ");
+            // We are checking here so we won't re-enter the emitting pipeline and emit extra sourcemap
+            if (node.attributes.properties && node.attributes.properties.length > 0) {
+                emit(node.attributes);
+            }
             write(">");
         }
         function emitJsxText(node) {
@@ -58150,6 +69944,9 @@ var ts;
             emitJsxTagName(node.tagName);
             write(">");
         }
+        function emitJsxAttributes(node) {
+            emitList(node, node.properties, 131328 /* JsxElementAttributes */);
+        }
         function emitJsxAttribute(node) {
             emit(node.name);
             emitWithPrefix("=", node.initializer);
@@ -58162,12 +69959,15 @@ var ts;
         function emitJsxExpression(node) {
             if (node.expression) {
                 write("{");
+                if (node.dotDotDotToken) {
+                    write("...");
+                }
                 emitExpression(node.expression);
                 write("}");
             }
         }
         function emitJsxTagName(node) {
-            if (node.kind === 69 /* Identifier */) {
+            if (node.kind === 71 /* Identifier */) {
                 emitExpression(node);
             }
             else {
@@ -58194,6 +69994,21 @@ var ts;
                 ts.nodeIsSynthesized(parentNode) ||
                     ts.nodeIsSynthesized(statements[0]) ||
                     ts.rangeStartPositionsAreOnSameLine(parentNode, statements[0], currentSourceFile));
+            // e.g:
+            //      case 0: // Zero
+            //      case 1: // One
+            //      case 2: // two
+            //          return "hi";
+            // If there is no statements, emitNodeWithComments of the parentNode which is caseClause will take care of trailing comment.
+            // So in example above, comment "// Zero" and "// One" will be emit in emitTrailingComments in emitNodeWithComments.
+            // However, for "case 2", because parentNode which is caseClause has an "end" property to be end of the statements (in this case return statement)
+            // comment "// two" will not be emitted in emitNodeWithComments.
+            // Therefore, we have to do the check here to emit such comment.
+            if (statements.length > 0) {
+                // We use emitTrailingCommentsOfPosition instead of emitLeadingCommentsOfPosition because leading comments is defined as comments before the node after newline character separating it from previous line
+                // Note: we can't use parentNode.end as such position includes statements.
+                emitTrailingCommentsOfPosition(statements.pos);
+            }
             if (emitAsSingleStatement) {
                 write(" ");
                 emit(statements[0]);
@@ -58209,12 +70024,11 @@ var ts;
             emitList(node, node.types, 272 /* HeritageClauseTypes */);
         }
         function emitCatchClause(node) {
-            writeLine();
-            var openParenPos = writeToken(72 /* CatchKeyword */, node.pos);
+            var openParenPos = writeToken(74 /* CatchKeyword */, node.pos);
             write(" ");
-            writeToken(17 /* OpenParenToken */, openParenPos);
+            writeToken(19 /* OpenParenToken */, openParenPos);
             emit(node.variableDeclaration);
-            writeToken(18 /* CloseParenToken */, node.variableDeclaration ? node.variableDeclaration.end : openParenPos);
+            writeToken(20 /* CloseParenToken */, node.variableDeclaration ? node.variableDeclaration.end : openParenPos);
             write(" ");
             emit(node.block);
         }
@@ -58232,7 +70046,7 @@ var ts;
             // "comment1" is not considered to be leading comment for node.initializer
             // but rather a trailing comment on the previous node.
             var initializer = node.initializer;
-            if ((ts.getEmitFlags(initializer) & 16384 /* NoLeadingComments */) === 0) {
+            if (emitTrailingCommentsOfPosition && (ts.getEmitFlags(initializer) & 512 /* NoLeadingComments */) === 0) {
                 var commentRange = ts.getCommentRange(initializer);
                 emitTrailingCommentsOfPosition(commentRange.pos);
             }
@@ -58245,6 +70059,12 @@ var ts;
                 emitExpression(node.objectAssignmentInitializer);
             }
         }
+        function emitSpreadAssignment(node) {
+            if (node.expression) {
+                write("...");
+                emitExpression(node.expression);
+            }
+        }
         //
         // Enum
         //
@@ -58257,33 +70077,53 @@ var ts;
         //
         function emitSourceFile(node) {
             writeLine();
-            emitShebang();
-            emitBodyWithDetachedComments(node, node.statements, emitSourceFileWorker);
+            var statements = node.statements;
+            if (emitBodyWithDetachedComments) {
+                // Emit detached comment if there are no prologue directives or if the first node is synthesized.
+                // The synthesized node will have no leading comment so some comments may be missed.
+                var shouldEmitDetachedComment = statements.length === 0 ||
+                    !ts.isPrologueDirective(statements[0]) ||
+                    ts.nodeIsSynthesized(statements[0]);
+                if (shouldEmitDetachedComment) {
+                    emitBodyWithDetachedComments(node, statements, emitSourceFileWorker);
+                    return;
+                }
+            }
+            emitSourceFileWorker(node);
         }
         function emitSourceFileWorker(node) {
             var statements = node.statements;
-            var statementOffset = emitPrologueDirectives(statements);
-            var savedTempFlags = tempFlags;
-            tempFlags = 0;
-            emitHelpers(node);
-            emitList(node, statements, 1 /* MultiLine */, statementOffset);
-            tempFlags = savedTempFlags;
+            pushNameGenerationScope();
+            emitHelpersIndirect(node);
+            var index = ts.findIndex(statements, function (statement) { return !ts.isPrologueDirective(statement); });
+            emitList(node, statements, 1 /* MultiLine */, index === -1 ? statements.length : index);
+            popNameGenerationScope();
         }
         // Transformation nodes
         function emitPartiallyEmittedExpression(node) {
             emitExpression(node.expression);
         }
+        function emitCommaList(node) {
+            emitExpressionList(node, node.elements, 272 /* CommaListElements */);
+        }
         /**
          * Emits any prologue directives at the start of a Statement list, returning the
          * number of prologue directives written to the output.
          */
-        function emitPrologueDirectives(statements, startWithNewLine) {
+        function emitPrologueDirectives(statements, startWithNewLine, seenPrologueDirectives) {
             for (var i = 0; i < statements.length; i++) {
-                if (ts.isPrologueDirective(statements[i])) {
-                    if (startWithNewLine || i > 0) {
-                        writeLine();
+                var statement = statements[i];
+                if (ts.isPrologueDirective(statement)) {
+                    var shouldEmitPrologueDirective = seenPrologueDirectives ? !seenPrologueDirectives.has(statement.expression.text) : true;
+                    if (shouldEmitPrologueDirective) {
+                        if (startWithNewLine || i > 0) {
+                            writeLine();
+                        }
+                        emit(statement);
+                        if (seenPrologueDirectives) {
+                            seenPrologueDirectives.set(statement.expression.text, statement.expression.text);
+                        }
                     }
-                    emit(statements[i]);
                 }
                 else {
                     // return index of the first non prologue directive
@@ -58292,99 +70132,45 @@ var ts;
             }
             return statements.length;
         }
-        function emitHelpers(node) {
-            var emitFlags = ts.getEmitFlags(node);
-            var helpersEmitted = false;
-            if (emitFlags & 1 /* EmitEmitHelpers */) {
-                helpersEmitted = emitEmitHelpers(currentSourceFile);
+        function emitPrologueDirectivesIfNeeded(sourceFileOrBundle) {
+            if (ts.isSourceFile(sourceFileOrBundle)) {
+                setSourceFile(sourceFileOrBundle);
+                emitPrologueDirectives(sourceFileOrBundle.statements);
             }
-            if (emitFlags & 2 /* EmitExportStar */) {
-                writeLines(exportStarHelper);
-                helpersEmitted = true;
-            }
-            if (emitFlags & 4 /* EmitSuperHelper */) {
-                writeLines(superHelper);
-                helpersEmitted = true;
-            }
-            if (emitFlags & 8 /* EmitAdvancedSuperHelper */) {
-                writeLines(advancedSuperHelper);
-                helpersEmitted = true;
+            else {
+                var seenPrologueDirectives = ts.createMap();
+                for (var _a = 0, _b = sourceFileOrBundle.sourceFiles; _a < _b.length; _a++) {
+                    var sourceFile = _b[_a];
+                    setSourceFile(sourceFile);
+                    emitPrologueDirectives(sourceFile.statements, /*startWithNewLine*/ true, seenPrologueDirectives);
+                }
             }
-            return helpersEmitted;
         }
-        function emitEmitHelpers(node) {
-            // Only emit helpers if the user did not say otherwise.
-            if (compilerOptions.noEmitHelpers) {
-                return false;
-            }
-            // Don't emit helpers if we can import them.
-            if (compilerOptions.importHelpers
-                && (ts.isExternalModule(node) || compilerOptions.isolatedModules)) {
-                return false;
-            }
-            var helpersEmitted = false;
-            // Only Emit __extends function when target ES5.
-            // For target ES6 and above, we can emit classDeclaration as is.
-            if ((languageVersion < 2 /* ES6 */) && (!extendsEmitted && node.flags & 1024 /* HasClassExtends */)) {
-                writeLines(extendsHelper);
-                extendsEmitted = true;
-                helpersEmitted = true;
-            }
-            if (compilerOptions.jsx !== 1 /* Preserve */ && !assignEmitted && (node.flags & 16384 /* HasJsxSpreadAttributes */)) {
-                writeLines(assignHelper);
-                assignEmitted = true;
-            }
-            if (!decorateEmitted && node.flags & 2048 /* HasDecorators */) {
-                writeLines(decorateHelper);
-                if (compilerOptions.emitDecoratorMetadata) {
-                    writeLines(metadataHelper);
-                }
-                decorateEmitted = true;
-                helpersEmitted = true;
-            }
-            if (!paramEmitted && node.flags & 4096 /* HasParamDecorators */) {
-                writeLines(paramHelper);
-                paramEmitted = true;
-                helpersEmitted = true;
-            }
-            if (!awaiterEmitted && node.flags & 8192 /* HasAsyncFunctions */) {
-                writeLines(awaiterHelper);
-                if (languageVersion < 2 /* ES6 */) {
-                    writeLines(generatorHelper);
-                }
-                awaiterEmitted = true;
-                helpersEmitted = true;
-            }
-            if (helpersEmitted) {
-                writeLine();
+        function emitShebangIfNeeded(sourceFileOrBundle) {
+            if (ts.isSourceFile(sourceFileOrBundle)) {
+                var shebang = ts.getShebang(sourceFileOrBundle.text);
+                if (shebang) {
+                    write(shebang);
+                    writeLine();
+                    return true;
+                }
             }
-            return helpersEmitted;
-        }
-        function writeLines(text) {
-            var lines = text.split(/\r\n|\r|\n/g);
-            for (var i = 0; i < lines.length; i++) {
-                var line = lines[i];
-                if (line.length) {
-                    if (i > 0) {
-                        writeLine();
+            else {
+                for (var _a = 0, _b = sourceFileOrBundle.sourceFiles; _a < _b.length; _a++) {
+                    var sourceFile = _b[_a];
+                    // Emit only the first encountered shebang
+                    if (emitShebangIfNeeded(sourceFile)) {
+                        break;
                     }
-                    write(line);
                 }
             }
         }
         //
         // Helpers
         //
-        function emitShebang() {
-            var shebang = ts.getShebang(currentText);
-            if (shebang) {
-                write(shebang);
-                writeLine();
-            }
-        }
         function emitModifiers(node, modifiers) {
             if (modifiers && modifiers.length) {
-                emitList(node, modifiers, 256 /* Modifiers */);
+                emitList(node, modifiers, 131328 /* Modifiers */);
                 write(" ");
             }
         }
@@ -58406,8 +70192,8 @@ var ts;
                 write(suffix);
             }
         }
-        function emitEmbeddedStatement(node) {
-            if (ts.isBlock(node)) {
+        function emitEmbeddedStatement(parent, node) {
+            if (ts.isBlock(node) || ts.getEmitFlags(parent) & 1 /* SingleLine */) {
                 write(" ");
                 emit(node);
             }
@@ -58430,11 +70216,24 @@ var ts;
         function emitParameters(parentNode, parameters) {
             emitList(parentNode, parameters, 1360 /* Parameters */);
         }
+        function canEmitSimpleArrowHead(parentNode, parameters) {
+            var parameter = ts.singleOrUndefined(parameters);
+            return parameter
+                && parameter.pos === parentNode.pos // may not have parsed tokens between parent and parameter
+                && !(ts.isArrowFunction(parentNode) && parentNode.type) // arrow function may not have return type annotation
+                && !ts.some(parentNode.decorators) // parent may not have decorators
+                && !ts.some(parentNode.modifiers) // parent may not have modifiers
+                && !ts.some(parentNode.typeParameters) // parent may not have type parameters
+                && !ts.some(parameter.decorators) // parameter may not have decorators
+                && !ts.some(parameter.modifiers) // parameter may not have modifiers
+                && !parameter.dotDotDotToken // parameter may not be rest
+                && !parameter.questionToken // parameter may not be optional
+                && !parameter.type // parameter may not have a type annotation
+                && !parameter.initializer // parameter may not have an initializer
+                && ts.isIdentifier(parameter.name); // parameter name must be identifier
+        }
         function emitParametersForArrow(parentNode, parameters) {
-            if (parameters &&
-                parameters.length === 1 &&
-                parameters[0].type === undefined &&
-                parameters[0].pos === parentNode.pos) {
+            if (canEmitSimpleArrowHead(parentNode, parameters)) {
                 emit(parameters[0]);
             }
             else {
@@ -58464,6 +70263,9 @@ var ts;
             if (format & 7680 /* BracketsMask */) {
                 write(getOpeningBracket(format));
             }
+            if (onBeforeEmitNodeArray) {
+                onBeforeEmitNodeArray(children);
+            }
             if (isEmpty) {
                 // Write a line terminator if the parent node was multi-line
                 if (format & 1 /* MultiLine */) {
@@ -58496,6 +70298,15 @@ var ts;
                     var child = children[start + i];
                     // Write the delimiter if this is not the first node.
                     if (previousSibling) {
+                        // i.e
+                        //      function commentedParameters(
+                        //          /* Parameter a */
+                        //          a
+                        //          /* End of parameter a */ -> this comment isn't considered to be trailing comment of parameter "a" due to newline
+                        //          ,
+                        if (delimiter && previousSibling.end !== parentNode.end) {
+                            emitLeadingCommentsOfPosition(previousSibling.end);
+                        }
                         write(delimiter);
                         // Write either a line terminator or whitespace to separate the elements.
                         if (shouldWriteSeparatingLineTerminator(previousSibling, child, format)) {
@@ -58512,14 +70323,16 @@ var ts;
                             write(" ");
                         }
                     }
+                    // Emit this child.
                     if (shouldEmitInterveningComments) {
-                        var commentRange = ts.getCommentRange(child);
-                        emitTrailingCommentsOfPosition(commentRange.pos);
+                        if (emitTrailingCommentsOfPosition) {
+                            var commentRange = ts.getCommentRange(child);
+                            emitTrailingCommentsOfPosition(commentRange.pos);
+                        }
                     }
                     else {
                         shouldEmitInterveningComments = mayEmitInterveningComments;
                     }
-                    // Emit this child.
                     emit(child);
                     if (shouldDecreaseIndentAfterEmit) {
                         decreaseIndent();
@@ -58532,6 +70345,15 @@ var ts;
                 if (format & 16 /* CommaDelimited */ && hasTrailingComma) {
                     write(",");
                 }
+                // Emit any trailing comment of the last element in the list
+                // i.e
+                //       var array = [...
+                //          2
+                //          /* end of element 2 */
+                //       ];
+                if (previousSibling && delimiter && previousSibling.end !== parentNode.end) {
+                    emitLeadingCommentsOfPosition(previousSibling.end);
+                }
                 // Decrease the indent, if requested.
                 if (format & 64 /* Indented */) {
                     decreaseIndent();
@@ -58544,28 +70366,89 @@ var ts;
                     write(" ");
                 }
             }
+            if (onAfterEmitNodeArray) {
+                onAfterEmitNodeArray(children);
+            }
             if (format & 7680 /* BracketsMask */) {
                 write(getClosingBracket(format));
             }
         }
+        function write(s) {
+            writer.write(s);
+        }
+        function writeLine() {
+            writer.writeLine();
+        }
+        function increaseIndent() {
+            writer.increaseIndent();
+        }
+        function decreaseIndent() {
+            writer.decreaseIndent();
+        }
         function writeIfAny(nodes, text) {
-            if (nodes && nodes.length > 0) {
+            if (ts.some(nodes)) {
                 write(text);
             }
         }
         function writeIfPresent(node, text) {
-            if (node !== undefined) {
+            if (node) {
                 write(text);
             }
         }
         function writeToken(token, pos, contextNode) {
-            return emitTokenWithSourceMap(contextNode, token, pos, writeTokenText);
+            return onEmitSourceMapOfToken
+                ? onEmitSourceMapOfToken(contextNode, token, pos, writeTokenText)
+                : writeTokenText(token, pos);
+        }
+        function writeTokenNode(node) {
+            if (onBeforeEmitToken) {
+                onBeforeEmitToken(node);
+            }
+            writeTokenText(node.kind);
+            if (onAfterEmitToken) {
+                onAfterEmitToken(node);
+            }
         }
         function writeTokenText(token, pos) {
             var tokenString = ts.tokenToString(token);
             write(tokenString);
             return pos < 0 ? pos : pos + tokenString.length;
         }
+        function writeLineOrSpace(node) {
+            if (ts.getEmitFlags(node) & 1 /* SingleLine */) {
+                write(" ");
+            }
+            else {
+                writeLine();
+            }
+        }
+        function writeLines(text) {
+            var lines = text.split(/\r\n?|\n/g);
+            var indentation = guessIndentation(lines);
+            for (var i = 0; i < lines.length; i++) {
+                var line = indentation ? lines[i].slice(indentation) : lines[i];
+                if (line.length) {
+                    writeLine();
+                    write(line);
+                    writeLine();
+                }
+            }
+        }
+        function guessIndentation(lines) {
+            var indentation;
+            for (var _a = 0, lines_1 = lines; _a < lines_1.length; _a++) {
+                var line = lines_1[_a];
+                for (var i = 0; i < line.length && (indentation === undefined || i < indentation); i++) {
+                    if (!ts.isWhiteSpaceLike(line.charCodeAt(i))) {
+                        if (indentation === undefined || i < indentation) {
+                            indentation = i;
+                            break;
+                        }
+                    }
+                }
+            }
+            return indentation;
+        }
         function increaseIndentIf(value, valueToWriteWhenNotIndenting) {
             if (value) {
                 increaseIndent();
@@ -58675,15 +70558,23 @@ var ts;
                 && !ts.nodeIsSynthesized(node2)
                 && !ts.rangeEndIsOnSameLineAsRangeStart(node1, node2, currentSourceFile);
         }
+        function isSingleLineEmptyBlock(block) {
+            return !block.multiLine
+                && isEmptyBlock(block);
+        }
+        function isEmptyBlock(block) {
+            return block.statements.length === 0
+                && ts.rangeEndIsOnSameLineAsRangeStart(block, block, currentSourceFile);
+        }
         function skipSynthesizedParentheses(node) {
-            while (node.kind === 178 /* ParenthesizedExpression */ && ts.nodeIsSynthesized(node)) {
+            while (node.kind === 185 /* ParenthesizedExpression */ && ts.nodeIsSynthesized(node)) {
                 node = node.expression;
             }
             return node;
         }
         function getTextOfNode(node, includeTrivia) {
             if (ts.isGeneratedIdentifier(node)) {
-                return getGeneratedIdentifier(node);
+                return generateName(node);
             }
             else if (ts.isIdentifier(node) && (ts.nodeIsSynthesized(node) || !node.parent)) {
                 return ts.unescapeIdentifier(node.text);
@@ -58700,29 +70591,68 @@ var ts;
             if (node.kind === 9 /* StringLiteral */ && node.textSourceNode) {
                 var textSourceNode = node.textSourceNode;
                 if (ts.isIdentifier(textSourceNode)) {
-                    return "\"" + ts.escapeNonAsciiCharacters(ts.escapeString(getTextOfNode(textSourceNode))) + "\"";
+                    return ts.getEmitFlags(node) & 16777216 /* NoAsciiEscaping */ ?
+                        "\"" + ts.escapeString(getTextOfNode(textSourceNode)) + "\"" :
+                        "\"" + ts.escapeNonAsciiString(getTextOfNode(textSourceNode)) + "\"";
                 }
                 else {
                     return getLiteralTextOfNode(textSourceNode);
                 }
             }
-            return ts.getLiteralText(node, currentSourceFile, languageVersion);
+            return ts.getLiteralText(node, currentSourceFile);
         }
-        function isSingleLineEmptyBlock(block) {
-            return !block.multiLine
-                && block.statements.length === 0
-                && ts.rangeEndIsOnSameLineAsRangeStart(block, block, currentSourceFile);
+        /**
+         * Push a new name generation scope.
+         */
+        function pushNameGenerationScope() {
+            tempFlagsStack.push(tempFlags);
+            tempFlags = 0;
+        }
+        /**
+         * Pop the current name generation scope.
+         */
+        function popNameGenerationScope() {
+            tempFlags = tempFlagsStack.pop();
+        }
+        /**
+         * Generate the text for a generated identifier.
+         */
+        function generateName(name) {
+            if (name.autoGenerateKind === 4 /* Node */) {
+                // Node names generate unique names based on their original node
+                // and are cached based on that node's id.
+                var node = getNodeForGeneratedName(name);
+                return generateNameCached(node);
+            }
+            else {
+                // Auto, Loop, and Unique names are cached based on their unique
+                // autoGenerateId.
+                var autoGenerateId = name.autoGenerateId;
+                return autoGeneratedIdToGeneratedName[autoGenerateId] || (autoGeneratedIdToGeneratedName[autoGenerateId] = ts.unescapeIdentifier(makeName(name)));
+            }
         }
+        function generateNameCached(node) {
+            var nodeId = ts.getNodeId(node);
+            return nodeIdToGeneratedName[nodeId] || (nodeIdToGeneratedName[nodeId] = ts.unescapeIdentifier(generateNameForNode(node)));
+        }
+        /**
+         * Returns a value indicating whether a name is unique globally, within the current file,
+         * or within the NameGenerator.
+         */
         function isUniqueName(name) {
-            return !resolver.hasGlobalName(name) &&
-                !ts.hasProperty(currentFileIdentifiers, name) &&
-                !ts.hasProperty(generatedNameSet, name);
+            return !(hasGlobalName && hasGlobalName(name))
+                && !currentSourceFile.identifiers.has(name)
+                && !generatedNames.has(name);
         }
+        /**
+         * Returns a value indicating whether a name is unique within a container.
+         */
         function isUniqueLocalName(name, container) {
             for (var node = container; ts.isNodeDescendantOf(node, container); node = node.nextContainer) {
-                if (node.locals && ts.hasProperty(node.locals, name)) {
+                if (node.locals) {
+                    var local = node.locals.get(name);
                     // We conservatively include alias symbols to cover cases where they're emitted as locals
-                    if (node.locals[name].flags & (107455 /* Value */ | 1048576 /* ExportValue */ | 8388608 /* Alias */)) {
+                    if (local && local.flags & (107455 /* Value */ | 1048576 /* ExportValue */ | 8388608 /* Alias */)) {
                         return false;
                     }
                 }
@@ -58730,16 +70660,16 @@ var ts;
             return true;
         }
         /**
-        * Return the next available name in the pattern _a ... _z, _0, _1, ...
-        * TempFlags._i or TempFlags._n may be used to express a preference for that dedicated name.
-        * Note that names generated by makeTempVariableName and makeUniqueName will never conflict.
-        */
+         * Return the next available name in the pattern _a ... _z, _0, _1, ...
+         * TempFlags._i or TempFlags._n may be used to express a preference for that dedicated name.
+         * Note that names generated by makeTempVariableName and makeUniqueName will never conflict.
+         */
         function makeTempVariableName(flags) {
             if (flags && !(tempFlags & flags)) {
-                var name_44 = flags === 268435456 /* _i */ ? "_i" : "_n";
-                if (isUniqueName(name_44)) {
+                var name_55 = flags === 268435456 /* _i */ ? "_i" : "_n";
+                if (isUniqueName(name_55)) {
                     tempFlags |= flags;
-                    return name_44;
+                    return name_55;
                 }
             }
             while (true) {
@@ -58747,19 +70677,21 @@ var ts;
                 tempFlags++;
                 // Skip over 'i' and 'n'
                 if (count !== 8 && count !== 13) {
-                    var name_45 = count < 26
+                    var name_56 = count < 26
                         ? "_" + String.fromCharCode(97 /* a */ + count)
                         : "_" + (count - 26);
-                    if (isUniqueName(name_45)) {
-                        return name_45;
+                    if (isUniqueName(name_56)) {
+                        return name_56;
                     }
                 }
             }
         }
-        // Generate a name that is unique within the current file and doesn't conflict with any names
-        // in global scope. The name is formed by adding an '_n' suffix to the specified base name,
-        // where n is a positive integer. Note that names generated by makeTempVariableName and
-        // makeUniqueName are guaranteed to never conflict.
+        /**
+         * Generate a name that is unique within the current file and doesn't conflict with any names
+         * in global scope. The name is formed by adding an '_n' suffix to the specified base name,
+         * where n is a positive integer. Note that names generated by makeTempVariableName and
+         * makeUniqueName are guaranteed to never conflict.
+         */
         function makeUniqueName(baseName) {
             // Find the first unique 'name_n', where n is a positive number
             if (baseName.charCodeAt(baseName.length - 1) !== 95 /* _ */) {
@@ -58769,73 +70701,90 @@ var ts;
             while (true) {
                 var generatedName = baseName + i;
                 if (isUniqueName(generatedName)) {
-                    return generatedNameSet[generatedName] = generatedName;
+                    generatedNames.set(generatedName, generatedName);
+                    return generatedName;
                 }
                 i++;
             }
         }
+        /**
+         * Generates a unique name for a ModuleDeclaration or EnumDeclaration.
+         */
         function generateNameForModuleOrEnum(node) {
             var name = getTextOfNode(node.name);
             // Use module/enum name itself if it is unique, otherwise make a unique variation
             return isUniqueLocalName(name, node) ? name : makeUniqueName(name);
         }
+        /**
+         * Generates a unique name for an ImportDeclaration or ExportDeclaration.
+         */
         function generateNameForImportOrExportDeclaration(node) {
             var expr = ts.getExternalModuleName(node);
             var baseName = expr.kind === 9 /* StringLiteral */ ?
                 ts.escapeIdentifier(ts.makeIdentifierFromModuleName(expr.text)) : "module";
             return makeUniqueName(baseName);
         }
+        /**
+         * Generates a unique name for a default export.
+         */
         function generateNameForExportDefault() {
             return makeUniqueName("default");
         }
+        /**
+         * Generates a unique name for a class expression.
+         */
         function generateNameForClassExpression() {
             return makeUniqueName("class");
         }
+        function generateNameForMethodOrAccessor(node) {
+            if (ts.isIdentifier(node.name)) {
+                return generateNameCached(node.name);
+            }
+            return makeTempVariableName(0 /* Auto */);
+        }
         /**
          * Generates a unique name from a node.
-         *
-         * @param node A node.
          */
         function generateNameForNode(node) {
             switch (node.kind) {
-                case 69 /* Identifier */:
+                case 71 /* Identifier */:
                     return makeUniqueName(getTextOfNode(node));
-                case 225 /* ModuleDeclaration */:
-                case 224 /* EnumDeclaration */:
+                case 233 /* ModuleDeclaration */:
+                case 232 /* EnumDeclaration */:
                     return generateNameForModuleOrEnum(node);
-                case 230 /* ImportDeclaration */:
-                case 236 /* ExportDeclaration */:
+                case 238 /* ImportDeclaration */:
+                case 244 /* ExportDeclaration */:
                     return generateNameForImportOrExportDeclaration(node);
-                case 220 /* FunctionDeclaration */:
-                case 221 /* ClassDeclaration */:
-                case 235 /* ExportAssignment */:
+                case 228 /* FunctionDeclaration */:
+                case 229 /* ClassDeclaration */:
+                case 243 /* ExportAssignment */:
                     return generateNameForExportDefault();
-                case 192 /* ClassExpression */:
+                case 199 /* ClassExpression */:
                     return generateNameForClassExpression();
+                case 151 /* MethodDeclaration */:
+                case 153 /* GetAccessor */:
+                case 154 /* SetAccessor */:
+                    return generateNameForMethodOrAccessor(node);
                 default:
                     return makeTempVariableName(0 /* Auto */);
             }
         }
         /**
          * Generates a unique identifier for a node.
-         *
-         * @param name A generated name.
          */
-        function generateName(name) {
+        function makeName(name) {
             switch (name.autoGenerateKind) {
                 case 1 /* Auto */:
                     return makeTempVariableName(0 /* Auto */);
                 case 2 /* Loop */:
                     return makeTempVariableName(268435456 /* _i */);
                 case 3 /* Unique */:
-                    return makeUniqueName(name.text);
+                    return makeUniqueName(ts.unescapeIdentifier(name.text));
             }
             ts.Debug.fail("Unsupported GeneratedIdentifierKind.");
         }
         /**
          * Gets the node from which a name should be generated.
-         *
-         * @param name A generated name wrapper.
          */
         function getNodeForGeneratedName(name) {
             var autoGenerateId = name.autoGenerateId;
@@ -58855,53 +70804,40 @@ var ts;
             // otherwise, return the original node for the source;
             return node;
         }
-        /**
-         * Gets the generated identifier text from a generated identifier.
-         *
-         * @param name The generated identifier.
-         */
-        function getGeneratedIdentifier(name) {
-            if (name.autoGenerateKind === 4 /* Node */) {
-                // Generated names generate unique names based on their original node
-                // and are cached based on that node's id
-                var node = getNodeForGeneratedName(name);
-                var nodeId = ts.getNodeId(node);
-                return nodeIdToGeneratedName[nodeId] || (nodeIdToGeneratedName[nodeId] = ts.unescapeIdentifier(generateNameForNode(node)));
-            }
-            else {
-                // Auto, Loop, and Unique names are cached based on their unique
-                // autoGenerateId.
-                var autoGenerateId = name.autoGenerateId;
-                return autoGeneratedIdToGeneratedName[autoGenerateId] || (autoGeneratedIdToGeneratedName[autoGenerateId] = ts.unescapeIdentifier(generateName(name)));
-            }
-        }
-        function createDelimiterMap() {
-            var delimiters = [];
-            delimiters[0 /* None */] = "";
-            delimiters[16 /* CommaDelimited */] = ",";
-            delimiters[4 /* BarDelimited */] = " |";
-            delimiters[8 /* AmpersandDelimited */] = " &";
-            return delimiters;
-        }
-        function getDelimiter(format) {
-            return delimiters[format & 28 /* DelimitersMask */];
-        }
-        function createBracketsMap() {
-            var brackets = [];
-            brackets[512 /* Braces */] = ["{", "}"];
-            brackets[1024 /* Parenthesis */] = ["(", ")"];
-            brackets[2048 /* AngleBrackets */] = ["<", ">"];
-            brackets[4096 /* SquareBrackets */] = ["[", "]"];
-            return brackets;
-        }
-        function getOpeningBracket(format) {
-            return brackets[format & 7680 /* BracketsMask */][0];
-        }
-        function getClosingBracket(format) {
-            return brackets[format & 7680 /* BracketsMask */][1];
-        }
     }
-    ts.emitFiles = emitFiles;
+    ts.createPrinter = createPrinter;
+    function createDelimiterMap() {
+        var delimiters = [];
+        delimiters[0 /* None */] = "";
+        delimiters[16 /* CommaDelimited */] = ",";
+        delimiters[4 /* BarDelimited */] = " |";
+        delimiters[8 /* AmpersandDelimited */] = " &";
+        return delimiters;
+    }
+    function getDelimiter(format) {
+        return delimiters[format & 28 /* DelimitersMask */];
+    }
+    function createBracketsMap() {
+        var brackets = [];
+        brackets[512 /* Braces */] = ["{", "}"];
+        brackets[1024 /* Parenthesis */] = ["(", ")"];
+        brackets[2048 /* AngleBrackets */] = ["<", ">"];
+        brackets[4096 /* SquareBrackets */] = ["[", "]"];
+        return brackets;
+    }
+    function getOpeningBracket(format) {
+        return brackets[format & 7680 /* BracketsMask */][0];
+    }
+    function getClosingBracket(format) {
+        return brackets[format & 7680 /* BracketsMask */][1];
+    }
+    // Flags enum to track count of temp variables and a few dedicated names
+    var TempFlags;
+    (function (TempFlags) {
+        TempFlags[TempFlags["Auto"] = 0] = "Auto";
+        TempFlags[TempFlags["CountMask"] = 268435455] = "CountMask";
+        TempFlags[TempFlags["_i"] = 268435456] = "_i";
+    })(TempFlags || (TempFlags = {}));
     var ListFormat;
     (function (ListFormat) {
         ListFormat[ListFormat["None"] = 0] = "None";
@@ -58935,9 +70871,10 @@ var ts;
         ListFormat[ListFormat["NoTrailingNewLine"] = 65536] = "NoTrailingNewLine";
         ListFormat[ListFormat["NoInterveningComments"] = 131072] = "NoInterveningComments";
         // Precomputed Formats
-        ListFormat[ListFormat["Modifiers"] = 256] = "Modifiers";
+        ListFormat[ListFormat["Modifiers"] = 131328] = "Modifiers";
         ListFormat[ListFormat["HeritageClauses"] = 256] = "HeritageClauses";
-        ListFormat[ListFormat["TypeLiteralMembers"] = 65] = "TypeLiteralMembers";
+        ListFormat[ListFormat["SingleLineTypeLiteralMembers"] = 448] = "SingleLineTypeLiteralMembers";
+        ListFormat[ListFormat["MultiLineTypeLiteralMembers"] = 65] = "MultiLineTypeLiteralMembers";
         ListFormat[ListFormat["TupleTypeElements"] = 336] = "TupleTypeElements";
         ListFormat[ListFormat["UnionTypeConstituents"] = 260] = "UnionTypeConstituents";
         ListFormat[ListFormat["IntersectionTypeConstituents"] = 264] = "IntersectionTypeConstituents";
@@ -58945,6 +70882,7 @@ var ts;
         ListFormat[ListFormat["ArrayBindingPatternElements"] = 304] = "ArrayBindingPatternElements";
         ListFormat[ListFormat["ObjectLiteralExpressionProperties"] = 978] = "ObjectLiteralExpressionProperties";
         ListFormat[ListFormat["ArrayLiteralExpressionElements"] = 4466] = "ArrayLiteralExpressionElements";
+        ListFormat[ListFormat["CommaListElements"] = 272] = "CommaListElements";
         ListFormat[ListFormat["CallExpressionArguments"] = 1296] = "CallExpressionArguments";
         ListFormat[ListFormat["NewExpressionArguments"] = 9488] = "NewExpressionArguments";
         ListFormat[ListFormat["TemplateExpressionSpans"] = 131072] = "TemplateExpressionSpans";
@@ -58976,9 +70914,8 @@ var ts;
 /// <reference path="core.ts" />
 var ts;
 (function (ts) {
-    /** The version of the TypeScript compiler release */
-    ts.version = "2.1.0";
     var emptyArray = [];
+    var ignoreDiagnosticCommentRegEx = /(^\s*$)|(^\s*\/\/\/?\s*(@ts-ignore)?)/;
     function findConfigFile(searchPath, fileExists, configName) {
         if (configName === void 0) { configName = "tsconfig.json"; }
         while (true) {
@@ -59013,7 +70950,8 @@ var ts;
                 commonPathComponents = sourcePathComponents;
                 return;
             }
-            for (var i = 0, n = Math.min(commonPathComponents.length, sourcePathComponents.length); i < n; i++) {
+            var n = Math.min(commonPathComponents.length, sourcePathComponents.length);
+            for (var i = 0; i < n; i++) {
                 if (getCanonicalFileName(commonPathComponents[i]) !== getCanonicalFileName(sourcePathComponents[i])) {
                     if (i === 0) {
                         // Failed to find any common path component
@@ -59046,8 +70984,6 @@ var ts;
             // otherwise use toLowerCase as a canonical form.
             return ts.sys.useCaseSensitiveFileNames ? fileName : fileName.toLowerCase();
         }
-        // returned by CScript sys environment
-        var unsupportedFileEncodingErrorCode = -2147024809;
         function getSourceFile(fileName, languageVersion, onError) {
             var text;
             try {
@@ -59058,20 +70994,18 @@ var ts;
             }
             catch (e) {
                 if (onError) {
-                    onError(e.number === unsupportedFileEncodingErrorCode
-                        ? ts.createCompilerDiagnostic(ts.Diagnostics.Unsupported_file_encoding).messageText
-                        : e.message);
+                    onError(e.message);
                 }
                 text = "";
             }
             return text !== undefined ? ts.createSourceFile(fileName, text, languageVersion, setParentNodes) : undefined;
         }
         function directoryExists(directoryPath) {
-            if (directoryPath in existingDirectories) {
+            if (existingDirectories.has(directoryPath)) {
                 return true;
             }
             if (ts.sys.directoryExists(directoryPath)) {
-                existingDirectories[directoryPath] = true;
+                existingDirectories.set(directoryPath, true);
                 return true;
             }
             return false;
@@ -59090,10 +71024,11 @@ var ts;
             }
             var hash = ts.sys.createHash(data);
             var mtimeBefore = ts.sys.getModifiedTime(fileName);
-            if (mtimeBefore && fileName in outputFingerprints) {
-                var fingerprint = outputFingerprints[fileName];
+            if (mtimeBefore) {
+                var fingerprint = outputFingerprints.get(fileName);
                 // If output has not been changed, and the file has no external modification
-                if (fingerprint.byteOrderMark === writeByteOrderMark &&
+                if (fingerprint &&
+                    fingerprint.byteOrderMark === writeByteOrderMark &&
                     fingerprint.hash === hash &&
                     fingerprint.mtime.getTime() === mtimeBefore.getTime()) {
                     return;
@@ -59101,11 +71036,11 @@ var ts;
             }
             ts.sys.writeFile(fileName, data, writeByteOrderMark);
             var mtimeAfter = ts.sys.getModifiedTime(fileName);
-            outputFingerprints[fileName] = {
+            outputFingerprints.set(fileName, {
                 hash: hash,
                 byteOrderMark: writeByteOrderMark,
                 mtime: mtimeAfter
-            };
+            });
         }
         function writeFile(fileName, data, writeByteOrderMark, onError) {
             try {
@@ -59144,7 +71079,7 @@ var ts;
             readFile: function (fileName) { return ts.sys.readFile(fileName); },
             trace: function (s) { return ts.sys.write(s + newLine); },
             directoryExists: function (directoryName) { return ts.sys.directoryExists(directoryName); },
-            getEnvironmentVariable: function (name) { return ts.getEnvironmentVariable(name, /*host*/ undefined); },
+            getEnvironmentVariable: function (name) { return ts.sys.getEnvironmentVariable ? ts.sys.getEnvironmentVariable(name) : ""; },
             getDirectories: function (path) { return ts.sys.getDirectories(path); },
             realpath: realpath
         };
@@ -59174,6 +71109,90 @@ var ts;
         return output;
     }
     ts.formatDiagnostics = formatDiagnostics;
+    var redForegroundEscapeSequence = "\u001b[91m";
+    var yellowForegroundEscapeSequence = "\u001b[93m";
+    var blueForegroundEscapeSequence = "\u001b[93m";
+    var gutterStyleSequence = "\u001b[100;30m";
+    var gutterSeparator = " ";
+    var resetEscapeSequence = "\u001b[0m";
+    var ellipsis = "...";
+    function getCategoryFormat(category) {
+        switch (category) {
+            case ts.DiagnosticCategory.Warning: return yellowForegroundEscapeSequence;
+            case ts.DiagnosticCategory.Error: return redForegroundEscapeSequence;
+            case ts.DiagnosticCategory.Message: return blueForegroundEscapeSequence;
+        }
+    }
+    function formatAndReset(text, formatStyle) {
+        return formatStyle + text + resetEscapeSequence;
+    }
+    function padLeft(s, length) {
+        while (s.length < length) {
+            s = " " + s;
+        }
+        return s;
+    }
+    function formatDiagnosticsWithColorAndContext(diagnostics, host) {
+        var output = "";
+        for (var _i = 0, diagnostics_2 = diagnostics; _i < diagnostics_2.length; _i++) {
+            var diagnostic = diagnostics_2[_i];
+            if (diagnostic.file) {
+                var start = diagnostic.start, length_5 = diagnostic.length, file = diagnostic.file;
+                var _a = ts.getLineAndCharacterOfPosition(file, start), firstLine = _a.line, firstLineChar = _a.character;
+                var _b = ts.getLineAndCharacterOfPosition(file, start + length_5), lastLine = _b.line, lastLineChar = _b.character;
+                var lastLineInFile = ts.getLineAndCharacterOfPosition(file, file.text.length).line;
+                var relativeFileName = host ? ts.convertToRelativePath(file.fileName, host.getCurrentDirectory(), function (fileName) { return host.getCanonicalFileName(fileName); }) : file.fileName;
+                var hasMoreThanFiveLines = (lastLine - firstLine) >= 4;
+                var gutterWidth = (lastLine + 1 + "").length;
+                if (hasMoreThanFiveLines) {
+                    gutterWidth = Math.max(ellipsis.length, gutterWidth);
+                }
+                output += ts.sys.newLine;
+                for (var i = firstLine; i <= lastLine; i++) {
+                    // If the error spans over 5 lines, we'll only show the first 2 and last 2 lines,
+                    // so we'll skip ahead to the second-to-last line.
+                    if (hasMoreThanFiveLines && firstLine + 1 < i && i < lastLine - 1) {
+                        output += formatAndReset(padLeft(ellipsis, gutterWidth), gutterStyleSequence) + gutterSeparator + ts.sys.newLine;
+                        i = lastLine - 1;
+                    }
+                    var lineStart = ts.getPositionOfLineAndCharacter(file, i, 0);
+                    var lineEnd = i < lastLineInFile ? ts.getPositionOfLineAndCharacter(file, i + 1, 0) : file.text.length;
+                    var lineContent = file.text.slice(lineStart, lineEnd);
+                    lineContent = lineContent.replace(/\s+$/g, ""); // trim from end
+                    lineContent = lineContent.replace("\t", " "); // convert tabs to single spaces
+                    // Output the gutter and the actual contents of the line.
+                    output += formatAndReset(padLeft(i + 1 + "", gutterWidth), gutterStyleSequence) + gutterSeparator;
+                    output += lineContent + ts.sys.newLine;
+                    // Output the gutter and the error span for the line using tildes.
+                    output += formatAndReset(padLeft("", gutterWidth), gutterStyleSequence) + gutterSeparator;
+                    output += redForegroundEscapeSequence;
+                    if (i === firstLine) {
+                        // If we're on the last line, then limit it to the last character of the last line.
+                        // Otherwise, we'll just squiggle the rest of the line, giving 'slice' no end position.
+                        var lastCharForLine = i === lastLine ? lastLineChar : undefined;
+                        output += lineContent.slice(0, firstLineChar).replace(/\S/g, " ");
+                        output += lineContent.slice(firstLineChar, lastCharForLine).replace(/./g, "~");
+                    }
+                    else if (i === lastLine) {
+                        output += lineContent.slice(0, lastLineChar).replace(/./g, "~");
+                    }
+                    else {
+                        // Squiggle the entire line.
+                        output += lineContent.replace(/./g, "~");
+                    }
+                    output += resetEscapeSequence;
+                    output += ts.sys.newLine;
+                }
+                output += ts.sys.newLine;
+                output += relativeFileName + "(" + (firstLine + 1) + "," + (firstLineChar + 1) + "): ";
+            }
+            var categoryColor = getCategoryFormat(diagnostic.category);
+            var category = ts.DiagnosticCategory[diagnostic.category].toLowerCase();
+            output += formatAndReset(category, categoryColor) + " TS" + diagnostic.code + ": " + flattenDiagnosticMessageText(diagnostic.messageText, ts.sys.newLine);
+        }
+        return output;
+    }
+    ts.formatDiagnosticsWithColorAndContext = formatDiagnosticsWithColorAndContext;
     function flattenDiagnosticMessageText(messageText, newLine) {
         if (typeof messageText === "string") {
             return messageText;
@@ -59203,15 +71222,32 @@ var ts;
         }
         var resolutions = [];
         var cache = ts.createMap();
-        for (var _i = 0, names_2 = names; _i < names_2.length; _i++) {
-            var name_46 = names_2[_i];
-            var result = name_46 in cache
-                ? cache[name_46]
-                : cache[name_46] = loader(name_46, containingFile);
+        for (var _i = 0, names_1 = names; _i < names_1.length; _i++) {
+            var name_57 = names_1[_i];
+            var result = void 0;
+            if (cache.has(name_57)) {
+                result = cache.get(name_57);
+            }
+            else {
+                cache.set(name_57, result = loader(name_57, containingFile));
+            }
             resolutions.push(result);
         }
         return resolutions;
     }
+    /**
+     * Create a new 'Program' instance. A Program is an immutable collection of 'SourceFile's and a 'CompilerOptions'
+     * that represent a compilation unit.
+     *
+     * Creating a program proceeds from a set of root files, expanding the set of inputs by following imports and
+     * triple-slash-reference-path directives transitively. '@types' and triple-slash-reference-types are also pulled in.
+     *
+     * @param rootNames - A set of root files.
+     * @param options - The compiler options which should be used.
+     * @param host - The host interacts with the underlying file system.
+     * @param oldProgram - Reuses an old program structure.
+     * @returns A 'Program' object.
+     */
     function createProgram(rootNames, options, host, oldProgram) {
         var program;
         var files = [];
@@ -59219,6 +71255,9 @@ var ts;
         var diagnosticsProducingTypeChecker;
         var noDiagnosticsTypeChecker;
         var classifiableNames;
+        var modifiedFilePaths;
+        var cachedSemanticDiagnosticsForFile = {};
+        var cachedDeclarationDiagnosticsForFile = {};
         var resolvedTypeReferenceDirectives = ts.createMap();
         var fileProcessingDiagnostics = ts.createDiagnosticCollection();
         // The below settings are to track if a .js file should be add to the program if loaded via searching under node_modules.
@@ -59228,7 +71267,7 @@ var ts;
         // - This calls resolveModuleNames, and then calls findSourceFile for each resolved module.
         // As all these operations happen - and are nested - within the createProgram call, they close over the below variables.
         // The current resolution depth is tracked by incrementing/decrementing as the depth first search progresses.
-        var maxNodeModulesJsDepth = typeof options.maxNodeModuleJsDepth === "number" ? options.maxNodeModuleJsDepth : 0;
+        var maxNodeModuleJsDepth = typeof options.maxNodeModuleJsDepth === "number" ? options.maxNodeModuleJsDepth : 0;
         var currentNodeModulesDepth = 0;
         // If a module has some of its imports skipped due to being at the depth limit under node_modules, then track
         // this, as it may be imported at a shallower depth later, and then it will need its skipped imports processed.
@@ -59243,12 +71282,23 @@ var ts;
         var supportedExtensions = ts.getSupportedExtensions(options);
         // Map storing if there is emit blocking diagnostics for given input
         var hasEmitBlockingDiagnostics = ts.createFileMap(getCanonicalFileName);
+        var _compilerOptionsObjectLiteralSyntax;
+        var moduleResolutionCache;
         var resolveModuleNamesWorker;
         if (host.resolveModuleNames) {
-            resolveModuleNamesWorker = function (moduleNames, containingFile) { return host.resolveModuleNames(moduleNames, containingFile); };
+            resolveModuleNamesWorker = function (moduleNames, containingFile) { return host.resolveModuleNames(moduleNames, containingFile).map(function (resolved) {
+                // An older host may have omitted extension, in which case we should infer it from the file extension of resolvedFileName.
+                if (!resolved || resolved.extension !== undefined) {
+                    return resolved;
+                }
+                var withExtension = ts.clone(resolved);
+                withExtension.extension = ts.extensionFromPath(resolved.resolvedFileName);
+                return withExtension;
+            }); };
         }
         else {
-            var loader_1 = function (moduleName, containingFile) { return ts.resolveModuleName(moduleName, containingFile, options, host).resolvedModule; };
+            moduleResolutionCache = ts.createModuleResolutionCache(currentDirectory, function (x) { return host.getCanonicalFileName(x); });
+            var loader_1 = function (moduleName, containingFile) { return ts.resolveModuleName(moduleName, containingFile, options, host, moduleResolutionCache).resolvedModule; };
             resolveModuleNamesWorker = function (moduleNames, containingFile) { return loadWithLocalCache(moduleNames, containingFile, loader_1); };
         }
         var resolveTypeReferenceDirectiveNamesWorker;
@@ -59263,13 +71313,15 @@ var ts;
         // stores 'filename -> file association' ignoring case
         // used to track cases when two file names differ only in casing
         var filesByNameIgnoreCase = host.useCaseSensitiveFileNames() ? ts.createFileMap(function (fileName) { return fileName.toLowerCase(); }) : undefined;
-        if (!tryReuseStructureFromOldProgram()) {
+        var structuralIsReused = tryReuseStructureFromOldProgram();
+        if (structuralIsReused !== 2 /* Completely */) {
             ts.forEach(rootNames, function (name) { return processRootFile(name, /*isDefaultLib*/ false); });
             // load type declarations specified via 'types' argument or implicitly from types/ and node_modules/@types folders
             var typeReferences = ts.getAutomaticTypeDirectiveNames(options, host);
-            if (typeReferences) {
+            if (typeReferences.length) {
                 // This containingFilename needs to match with the one used in managed-side
-                var containingFilename = ts.combinePaths(host.getCurrentDirectory(), "__inferred type names__.ts");
+                var containingDirectory = options.configFilePath ? ts.getDirectoryPath(options.configFilePath) : host.getCurrentDirectory();
+                var containingFilename = ts.combinePaths(containingDirectory, "__inferred type names__.ts");
                 var resolutions = resolveTypeReferenceDirectiveNamesWorker(typeReferences, containingFilename);
                 for (var i = 0; i < typeReferences.length; i++) {
                     processTypeReferenceDirective(typeReferences[i], resolutions[i]);
@@ -59293,6 +71345,8 @@ var ts;
                 }
             }
         }
+        // unconditionally set moduleResolutionCache to undefined to avoid unnecessary leaks
+        moduleResolutionCache = undefined;
         // unconditionally set oldProgram to undefined to prevent it from being captured in closure
         oldProgram = undefined;
         program = {
@@ -59318,20 +71372,23 @@ var ts;
             getTypeCount: function () { return getDiagnosticsProducingTypeChecker().getTypeCount(); },
             getFileProcessingDiagnostics: function () { return fileProcessingDiagnostics; },
             getResolvedTypeReferenceDirectives: function () { return resolvedTypeReferenceDirectives; },
-            dropDiagnosticsProducingTypeChecker: dropDiagnosticsProducingTypeChecker
+            isSourceFileFromExternalLibrary: isSourceFileFromExternalLibrary,
+            dropDiagnosticsProducingTypeChecker: dropDiagnosticsProducingTypeChecker,
+            getSourceFileFromReference: getSourceFileFromReference,
         };
         verifyCompilerOptions();
         ts.performance.mark("afterProgram");
         ts.performance.measure("Program", "beforeProgram", "afterProgram");
         return program;
         function getCommonSourceDirectory() {
-            if (typeof commonSourceDirectory === "undefined") {
-                if (options.rootDir && checkSourceFilesBelongToPath(files, options.rootDir)) {
+            if (commonSourceDirectory === undefined) {
+                var emittedFiles = ts.filter(files, function (file) { return ts.sourceFileMayBeEmitted(file, options, isSourceFileFromExternalLibrary); });
+                if (options.rootDir && checkSourceFilesBelongToPath(emittedFiles, options.rootDir)) {
                     // If a rootDir is specified and is valid use it as the commonSourceDirectory
                     commonSourceDirectory = ts.getNormalizedAbsolutePath(options.rootDir, currentDirectory);
                 }
                 else {
-                    commonSourceDirectory = computeCommonSourceDirectory(files);
+                    commonSourceDirectory = computeCommonSourceDirectory(emittedFiles);
                 }
                 if (commonSourceDirectory && commonSourceDirectory[commonSourceDirectory.length - 1] !== ts.directorySeparator) {
                     // Make sure directory path ends with directory separator so this string can directly
@@ -59349,126 +71406,257 @@ var ts;
                 classifiableNames = ts.createMap();
                 for (var _i = 0, files_2 = files; _i < files_2.length; _i++) {
                     var sourceFile = files_2[_i];
-                    ts.copyProperties(sourceFile.classifiableNames, classifiableNames);
+                    ts.copyEntries(sourceFile.classifiableNames, classifiableNames);
                 }
             }
             return classifiableNames;
         }
+        function resolveModuleNamesReusingOldState(moduleNames, containingFile, file, oldProgramState) {
+            if (structuralIsReused === 0 /* Not */ && !file.ambientModuleNames.length) {
+                // If the old program state does not permit reusing resolutions and `file` does not contain locally defined ambient modules,
+                // the best we can do is fallback to the default logic.
+                return resolveModuleNamesWorker(moduleNames, containingFile);
+            }
+            var oldSourceFile = oldProgramState.program && oldProgramState.program.getSourceFile(containingFile);
+            if (oldSourceFile !== file && file.resolvedModules) {
+                // `file` was created for the new program.
+                //
+                // We only set `file.resolvedModules` via work from the current function,
+                // so it is defined iff we already called the current function on `file`.
+                // That call happened no later than the creation of the `file` object,
+                // which per above occured during the current program creation.
+                // Since we assume the filesystem does not change during program creation,
+                // it is safe to reuse resolutions from the earlier call.
+                var result_4 = [];
+                for (var _i = 0, moduleNames_1 = moduleNames; _i < moduleNames_1.length; _i++) {
+                    var moduleName = moduleNames_1[_i];
+                    var resolvedModule = file.resolvedModules.get(moduleName);
+                    result_4.push(resolvedModule);
+                }
+                return result_4;
+            }
+            // At this point, we know at least one of the following hold:
+            // - file has local declarations for ambient modules
+            // - old program state is available
+            // With this information, we can infer some module resolutions without performing resolution.
+            /** An ordered list of module names for which we cannot recover the resolution. */
+            var unknownModuleNames;
+            /**
+             * The indexing of elements in this list matches that of `moduleNames`.
+             *
+             * Before combining results, result[i] is in one of the following states:
+             * * undefined: needs to be recomputed,
+             * * predictedToResolveToAmbientModuleMarker: known to be an ambient module.
+             * Needs to be reset to undefined before returning,
+             * * ResolvedModuleFull instance: can be reused.
+             */
+            var result;
+            /** A transient placeholder used to mark predicted resolution in the result list. */
+            var predictedToResolveToAmbientModuleMarker = {};
+            for (var i = 0; i < moduleNames.length; i++) {
+                var moduleName = moduleNames[i];
+                // If we want to reuse resolutions more aggressively, we can refine this to check for whether the
+                // text of the corresponding modulenames has changed.
+                if (file === oldSourceFile) {
+                    var oldResolvedModule = oldSourceFile && oldSourceFile.resolvedModules.get(moduleName);
+                    if (oldResolvedModule) {
+                        if (ts.isTraceEnabled(options, host)) {
+                            ts.trace(host, ts.Diagnostics.Reusing_resolution_of_module_0_to_file_1_from_old_program, moduleName, containingFile);
+                        }
+                        (result || (result = new Array(moduleNames.length)))[i] = oldResolvedModule;
+                        continue;
+                    }
+                }
+                // We know moduleName resolves to an ambient module provided that moduleName:
+                // - is in the list of ambient modules locally declared in the current source file.
+                // - resolved to an ambient module in the old program whose declaration is in an unmodified file
+                //   (so the same module declaration will land in the new program)
+                var resolvesToAmbientModuleInNonModifiedFile = false;
+                if (ts.contains(file.ambientModuleNames, moduleName)) {
+                    resolvesToAmbientModuleInNonModifiedFile = true;
+                    if (ts.isTraceEnabled(options, host)) {
+                        ts.trace(host, ts.Diagnostics.Module_0_was_resolved_as_locally_declared_ambient_module_in_file_1, moduleName, containingFile);
+                    }
+                }
+                else {
+                    resolvesToAmbientModuleInNonModifiedFile = moduleNameResolvesToAmbientModuleInNonModifiedFile(moduleName, oldProgramState);
+                }
+                if (resolvesToAmbientModuleInNonModifiedFile) {
+                    (result || (result = new Array(moduleNames.length)))[i] = predictedToResolveToAmbientModuleMarker;
+                }
+                else {
+                    // Resolution failed in the old program, or resolved to an ambient module for which we can't reuse the result.
+                    (unknownModuleNames || (unknownModuleNames = [])).push(moduleName);
+                }
+            }
+            var resolutions = unknownModuleNames && unknownModuleNames.length
+                ? resolveModuleNamesWorker(unknownModuleNames, containingFile)
+                : emptyArray;
+            // Combine results of resolutions and predicted results
+            if (!result) {
+                // There were no unresolved/ambient resolutions.
+                ts.Debug.assert(resolutions.length === moduleNames.length);
+                return resolutions;
+            }
+            var j = 0;
+            for (var i = 0; i < result.length; i++) {
+                if (result[i]) {
+                    // `result[i]` is either a `ResolvedModuleFull` or a marker.
+                    // If it is the former, we can leave it as is.
+                    if (result[i] === predictedToResolveToAmbientModuleMarker) {
+                        result[i] = undefined;
+                    }
+                }
+                else {
+                    result[i] = resolutions[j];
+                    j++;
+                }
+            }
+            ts.Debug.assert(j === resolutions.length);
+            return result;
+            // If we change our policy of rechecking failed lookups on each program create,
+            // we should adjust the value returned here.
+            function moduleNameResolvesToAmbientModuleInNonModifiedFile(moduleName, oldProgramState) {
+                var resolutionToFile = ts.getResolvedModule(oldProgramState.file, moduleName);
+                if (resolutionToFile) {
+                    // module used to be resolved to file - ignore it
+                    return false;
+                }
+                var ambientModule = oldProgramState.program && oldProgramState.program.getTypeChecker().tryFindAmbientModuleWithoutAugmentations(moduleName);
+                if (!(ambientModule && ambientModule.declarations)) {
+                    return false;
+                }
+                // at least one of declarations should come from non-modified source file
+                var firstUnmodifiedFile = ts.forEach(ambientModule.declarations, function (d) {
+                    var f = ts.getSourceFileOfNode(d);
+                    return !ts.contains(oldProgramState.modifiedFilePaths, f.path) && f;
+                });
+                if (!firstUnmodifiedFile) {
+                    return false;
+                }
+                if (ts.isTraceEnabled(options, host)) {
+                    ts.trace(host, ts.Diagnostics.Module_0_was_resolved_as_ambient_module_declared_in_1_since_this_file_was_not_modified, moduleName, firstUnmodifiedFile.fileName);
+                }
+                return true;
+            }
+        }
         function tryReuseStructureFromOldProgram() {
             if (!oldProgram) {
-                return false;
+                return 0 /* Not */;
             }
             // check properties that can affect structure of the program or module resolution strategy
             // if any of these properties has changed - structure cannot be reused
             var oldOptions = oldProgram.getCompilerOptions();
-            if ((oldOptions.module !== options.module) ||
-                (oldOptions.moduleResolution !== options.moduleResolution) ||
-                (oldOptions.noResolve !== options.noResolve) ||
-                (oldOptions.target !== options.target) ||
-                (oldOptions.noLib !== options.noLib) ||
-                (oldOptions.jsx !== options.jsx) ||
-                (oldOptions.allowJs !== options.allowJs) ||
-                (oldOptions.rootDir !== options.rootDir) ||
-                (oldOptions.configFilePath !== options.configFilePath) ||
-                (oldOptions.baseUrl !== options.baseUrl) ||
-                (oldOptions.maxNodeModuleJsDepth !== options.maxNodeModuleJsDepth) ||
-                !ts.arrayIsEqualTo(oldOptions.typeRoots, oldOptions.typeRoots) ||
-                !ts.arrayIsEqualTo(oldOptions.rootDirs, options.rootDirs) ||
-                !ts.equalOwnProperties(oldOptions.paths, options.paths)) {
-                return false;
+            if (ts.changesAffectModuleResolution(oldOptions, options)) {
+                return oldProgram.structureIsReused = 0 /* Not */;
             }
-            ts.Debug.assert(!oldProgram.structureIsReused);
+            ts.Debug.assert(!(oldProgram.structureIsReused & (2 /* Completely */ | 1 /* SafeModules */)));
             // there is an old program, check if we can reuse its structure
             var oldRootNames = oldProgram.getRootFileNames();
             if (!ts.arrayIsEqualTo(oldRootNames, rootNames)) {
-                return false;
+                return oldProgram.structureIsReused = 0 /* Not */;
             }
             if (!ts.arrayIsEqualTo(options.types, oldOptions.types)) {
-                return false;
+                return oldProgram.structureIsReused = 0 /* Not */;
             }
             // check if program source files has changed in the way that can affect structure of the program
             var newSourceFiles = [];
             var filePaths = [];
             var modifiedSourceFiles = [];
+            oldProgram.structureIsReused = 2 /* Completely */;
             for (var _i = 0, _a = oldProgram.getSourceFiles(); _i < _a.length; _i++) {
                 var oldSourceFile = _a[_i];
                 var newSourceFile = host.getSourceFileByPath
                     ? host.getSourceFileByPath(oldSourceFile.fileName, oldSourceFile.path, options.target)
                     : host.getSourceFile(oldSourceFile.fileName, options.target);
                 if (!newSourceFile) {
-                    return false;
+                    return oldProgram.structureIsReused = 0 /* Not */;
                 }
                 newSourceFile.path = oldSourceFile.path;
                 filePaths.push(newSourceFile.path);
                 if (oldSourceFile !== newSourceFile) {
+                    // The `newSourceFile` object was created for the new program.
                     if (oldSourceFile.hasNoDefaultLib !== newSourceFile.hasNoDefaultLib) {
                         // value of no-default-lib has changed
                         // this will affect if default library is injected into the list of files
-                        return false;
+                        oldProgram.structureIsReused = 1 /* SafeModules */;
                     }
                     // check tripleslash references
                     if (!ts.arrayIsEqualTo(oldSourceFile.referencedFiles, newSourceFile.referencedFiles, fileReferenceIsEqualTo)) {
                         // tripleslash references has changed
-                        return false;
+                        oldProgram.structureIsReused = 1 /* SafeModules */;
                     }
                     // check imports and module augmentations
                     collectExternalModuleReferences(newSourceFile);
                     if (!ts.arrayIsEqualTo(oldSourceFile.imports, newSourceFile.imports, moduleNameIsEqualTo)) {
                         // imports has changed
-                        return false;
+                        oldProgram.structureIsReused = 1 /* SafeModules */;
                     }
                     if (!ts.arrayIsEqualTo(oldSourceFile.moduleAugmentations, newSourceFile.moduleAugmentations, moduleNameIsEqualTo)) {
                         // moduleAugmentations has changed
-                        return false;
+                        oldProgram.structureIsReused = 1 /* SafeModules */;
                     }
                     if (!ts.arrayIsEqualTo(oldSourceFile.typeReferenceDirectives, newSourceFile.typeReferenceDirectives, fileReferenceIsEqualTo)) {
                         // 'types' references has changed
-                        return false;
+                        oldProgram.structureIsReused = 1 /* SafeModules */;
                     }
-                    var newSourceFilePath = ts.getNormalizedAbsolutePath(newSourceFile.fileName, currentDirectory);
-                    if (resolveModuleNamesWorker) {
-                        var moduleNames = ts.map(ts.concatenate(newSourceFile.imports, newSourceFile.moduleAugmentations), getTextOfLiteral);
-                        var resolutions = resolveModuleNamesWorker(moduleNames, newSourceFilePath);
-                        // ensure that module resolution results are still correct
-                        var resolutionsChanged = ts.hasChangesInResolutions(moduleNames, resolutions, oldSourceFile.resolvedModules, ts.moduleResolutionIsEqualTo);
-                        if (resolutionsChanged) {
-                            return false;
-                        }
+                    // tentatively approve the file
+                    modifiedSourceFiles.push({ oldFile: oldSourceFile, newFile: newSourceFile });
+                }
+                // if file has passed all checks it should be safe to reuse it
+                newSourceFiles.push(newSourceFile);
+            }
+            if (oldProgram.structureIsReused !== 2 /* Completely */) {
+                return oldProgram.structureIsReused;
+            }
+            modifiedFilePaths = modifiedSourceFiles.map(function (f) { return f.newFile.path; });
+            // try to verify results of module resolution
+            for (var _b = 0, modifiedSourceFiles_1 = modifiedSourceFiles; _b < modifiedSourceFiles_1.length; _b++) {
+                var _c = modifiedSourceFiles_1[_b], oldSourceFile = _c.oldFile, newSourceFile = _c.newFile;
+                var newSourceFilePath = ts.getNormalizedAbsolutePath(newSourceFile.fileName, currentDirectory);
+                if (resolveModuleNamesWorker) {
+                    var moduleNames = ts.map(ts.concatenate(newSourceFile.imports, newSourceFile.moduleAugmentations), getTextOfLiteral);
+                    var oldProgramState = { program: oldProgram, file: oldSourceFile, modifiedFilePaths: modifiedFilePaths };
+                    var resolutions = resolveModuleNamesReusingOldState(moduleNames, newSourceFilePath, newSourceFile, oldProgramState);
+                    // ensure that module resolution results are still correct
+                    var resolutionsChanged = ts.hasChangesInResolutions(moduleNames, resolutions, oldSourceFile.resolvedModules, ts.moduleResolutionIsEqualTo);
+                    if (resolutionsChanged) {
+                        oldProgram.structureIsReused = 1 /* SafeModules */;
+                        newSourceFile.resolvedModules = ts.zipToMap(moduleNames, resolutions);
                     }
-                    if (resolveTypeReferenceDirectiveNamesWorker) {
-                        var typesReferenceDirectives = ts.map(newSourceFile.typeReferenceDirectives, function (x) { return x.fileName; });
-                        var resolutions = resolveTypeReferenceDirectiveNamesWorker(typesReferenceDirectives, newSourceFilePath);
-                        // ensure that types resolutions are still correct
-                        var resolutionsChanged = ts.hasChangesInResolutions(typesReferenceDirectives, resolutions, oldSourceFile.resolvedTypeReferenceDirectiveNames, ts.typeDirectiveIsEqualTo);
-                        if (resolutionsChanged) {
-                            return false;
-                        }
+                    else {
+                        newSourceFile.resolvedModules = oldSourceFile.resolvedModules;
                     }
-                    // pass the cache of module/types resolutions from the old source file
-                    newSourceFile.resolvedModules = oldSourceFile.resolvedModules;
-                    newSourceFile.resolvedTypeReferenceDirectiveNames = oldSourceFile.resolvedTypeReferenceDirectiveNames;
-                    modifiedSourceFiles.push(newSourceFile);
                 }
-                else {
-                    // file has no changes - use it as is
-                    newSourceFile = oldSourceFile;
+                if (resolveTypeReferenceDirectiveNamesWorker) {
+                    var typesReferenceDirectives = ts.map(newSourceFile.typeReferenceDirectives, function (x) { return x.fileName; });
+                    var resolutions = resolveTypeReferenceDirectiveNamesWorker(typesReferenceDirectives, newSourceFilePath);
+                    // ensure that types resolutions are still correct
+                    var resolutionsChanged = ts.hasChangesInResolutions(typesReferenceDirectives, resolutions, oldSourceFile.resolvedTypeReferenceDirectiveNames, ts.typeDirectiveIsEqualTo);
+                    if (resolutionsChanged) {
+                        oldProgram.structureIsReused = 1 /* SafeModules */;
+                        newSourceFile.resolvedTypeReferenceDirectiveNames = ts.zipToMap(typesReferenceDirectives, resolutions);
+                    }
+                    else {
+                        newSourceFile.resolvedTypeReferenceDirectiveNames = oldSourceFile.resolvedTypeReferenceDirectiveNames;
+                    }
                 }
-                // if file has passed all checks it should be safe to reuse it
-                newSourceFiles.push(newSourceFile);
+            }
+            if (oldProgram.structureIsReused !== 2 /* Completely */) {
+                return oldProgram.structureIsReused;
             }
             // update fileName -> file mapping
-            for (var i = 0, len = newSourceFiles.length; i < len; i++) {
+            for (var i = 0; i < newSourceFiles.length; i++) {
                 filesByName.set(filePaths[i], newSourceFiles[i]);
             }
             files = newSourceFiles;
             fileProcessingDiagnostics = oldProgram.getFileProcessingDiagnostics();
-            for (var _b = 0, modifiedSourceFiles_1 = modifiedSourceFiles; _b < modifiedSourceFiles_1.length; _b++) {
-                var modifiedFile = modifiedSourceFiles_1[_b];
-                fileProcessingDiagnostics.reattachFileDiagnostics(modifiedFile);
+            for (var _d = 0, modifiedSourceFiles_2 = modifiedSourceFiles; _d < modifiedSourceFiles_2.length; _d++) {
+                var modifiedFile = modifiedSourceFiles_2[_d];
+                fileProcessingDiagnostics.reattachFileDiagnostics(modifiedFile.newFile);
             }
             resolvedTypeReferenceDirectives = oldProgram.getResolvedTypeReferenceDirectives();
-            oldProgram.structureIsReused = true;
-            return true;
+            return oldProgram.structureIsReused = 2 /* Completely */;
         }
         function getEmitHost(writeFileCallback) {
             return {
@@ -59480,11 +71668,14 @@ var ts;
                 getSourceFile: program.getSourceFile,
                 getSourceFileByPath: program.getSourceFileByPath,
                 getSourceFiles: program.getSourceFiles,
-                isSourceFileFromExternalLibrary: function (file) { return !!sourceFilesFoundSearchingNodeModules[file.path]; },
+                isSourceFileFromExternalLibrary: isSourceFileFromExternalLibrary,
                 writeFile: writeFileCallback || (function (fileName, data, writeByteOrderMark, onError, sourceFiles) { return host.writeFile(fileName, data, writeByteOrderMark, onError, sourceFiles); }),
                 isEmitBlocked: isEmitBlocked,
             };
         }
+        function isSourceFileFromExternalLibrary(file) {
+            return sourceFilesFoundSearchingNodeModules.get(file.path);
+        }
         function getDiagnosticsProducingTypeChecker() {
             return diagnosticsProducingTypeChecker || (diagnosticsProducingTypeChecker = ts.createTypeChecker(program, /*produceDiagnostics:*/ true));
         }
@@ -59494,13 +71685,13 @@ var ts;
         function getTypeChecker() {
             return noDiagnosticsTypeChecker || (noDiagnosticsTypeChecker = ts.createTypeChecker(program, /*produceDiagnostics:*/ false));
         }
-        function emit(sourceFile, writeFileCallback, cancellationToken, emitOnlyDtsFiles) {
-            return runWithCancellationToken(function () { return emitWorker(program, sourceFile, writeFileCallback, cancellationToken, emitOnlyDtsFiles); });
+        function emit(sourceFile, writeFileCallback, cancellationToken, emitOnlyDtsFiles, transformers) {
+            return runWithCancellationToken(function () { return emitWorker(program, sourceFile, writeFileCallback, cancellationToken, emitOnlyDtsFiles, transformers); });
         }
         function isEmitBlocked(emitFileName) {
             return hasEmitBlockingDiagnostics.contains(ts.toPath(emitFileName, currentDirectory, getCanonicalFileName));
         }
-        function emitWorker(program, sourceFile, writeFileCallback, cancellationToken, emitOnlyDtsFiles) {
+        function emitWorker(program, sourceFile, writeFileCallback, cancellationToken, emitOnlyDtsFiles, customTransformers) {
             var declarationDiagnostics = [];
             if (options.noEmit) {
                 return { diagnostics: declarationDiagnostics, sourceMaps: undefined, emittedFiles: undefined, emitSkipped: true };
@@ -59532,7 +71723,8 @@ var ts;
             // checked is to not pass the file to getEmitResolver.
             var emitResolver = getDiagnosticsProducingTypeChecker().getEmitResolver((options.outFile || options.out) ? undefined : sourceFile);
             ts.performance.mark("beforeEmit");
-            var emitResult = ts.emitFiles(emitResolver, getEmitHost(writeFileCallback), sourceFile, emitOnlyDtsFiles);
+            var transformers = emitOnlyDtsFiles ? [] : ts.getTransformers(options, customTransformers);
+            var emitResult = ts.emitFiles(emitResolver, getEmitHost(writeFileCallback), sourceFile, emitOnlyDtsFiles, transformers);
             ts.performance.mark("afterEmit");
             ts.performance.measure("Emit", "beforeEmit", "afterEmit");
             return emitResult;
@@ -59547,14 +71739,12 @@ var ts;
             if (sourceFile) {
                 return getDiagnostics(sourceFile, cancellationToken);
             }
-            var allDiagnostics = [];
-            ts.forEach(program.getSourceFiles(), function (sourceFile) {
+            return ts.sortAndDeduplicateDiagnostics(ts.flatMap(program.getSourceFiles(), function (sourceFile) {
                 if (cancellationToken) {
                     cancellationToken.throwIfCancellationRequested();
                 }
-                ts.addRange(allDiagnostics, getDiagnostics(sourceFile, cancellationToken));
-            });
-            return ts.sortAndDeduplicateDiagnostics(allDiagnostics);
+                return getDiagnostics(sourceFile, cancellationToken);
+            }));
         }
         function getSyntacticDiagnostics(sourceFile, cancellationToken) {
             return getDiagnosticsHelper(sourceFile, getSyntacticDiagnosticsForFile, cancellationToken);
@@ -59572,7 +71762,18 @@ var ts;
                 return getDiagnosticsHelper(sourceFile, getDeclarationDiagnosticsForFile, cancellationToken);
             }
         }
-        function getSyntacticDiagnosticsForFile(sourceFile, cancellationToken) {
+        function getSyntacticDiagnosticsForFile(sourceFile) {
+            // For JavaScript files, we report semantic errors for using TypeScript-only
+            // constructs from within a JavaScript file as syntactic errors.
+            if (ts.isSourceFileJavaScript(sourceFile)) {
+                if (!sourceFile.additionalSyntacticDiagnostics) {
+                    sourceFile.additionalSyntacticDiagnostics = getJavaScriptSyntacticDiagnosticsForFile(sourceFile);
+                    if (ts.isCheckJsEnabledForFile(sourceFile, options)) {
+                        sourceFile.additionalSyntacticDiagnostics = ts.concatenate(sourceFile.additionalSyntacticDiagnostics, sourceFile.jsDocDiagnostics);
+                    }
+                }
+                return ts.concatenate(sourceFile.additionalSyntacticDiagnostics, sourceFile.parseDiagnostics);
+            }
             return sourceFile.parseDiagnostics;
         }
         function runWithCancellationToken(func) {
@@ -59597,213 +71798,263 @@ var ts;
             }
         }
         function getSemanticDiagnosticsForFile(sourceFile, cancellationToken) {
+            return getAndCacheDiagnostics(sourceFile, cancellationToken, cachedSemanticDiagnosticsForFile, getSemanticDiagnosticsForFileNoCache);
+        }
+        function getSemanticDiagnosticsForFileNoCache(sourceFile, cancellationToken) {
             return runWithCancellationToken(function () {
+                // If skipLibCheck is enabled, skip reporting errors if file is a declaration file.
+                // If skipDefaultLibCheck is enabled, skip reporting errors if file contains a
+                // '/// <reference no-default-lib="true"/>' directive.
+                if (options.skipLibCheck && sourceFile.isDeclarationFile || options.skipDefaultLibCheck && sourceFile.hasNoDefaultLib) {
+                    return emptyArray;
+                }
                 var typeChecker = getDiagnosticsProducingTypeChecker();
                 ts.Debug.assert(!!sourceFile.bindDiagnostics);
-                var bindDiagnostics = sourceFile.bindDiagnostics;
-                // For JavaScript files, we don't want to report the normal typescript semantic errors.
-                // Instead, we just report errors for using TypeScript-only constructs from within a
-                // JavaScript file.
-                var checkDiagnostics = ts.isSourceFileJavaScript(sourceFile) ?
-                    getJavaScriptSemanticDiagnosticsForFile(sourceFile, cancellationToken) :
-                    typeChecker.getDiagnostics(sourceFile, cancellationToken);
+                // For JavaScript files, we don't want to report semantic errors unless explicitly requested.
+                var includeBindAndCheckDiagnostics = !ts.isSourceFileJavaScript(sourceFile) || ts.isCheckJsEnabledForFile(sourceFile, options);
+                var bindDiagnostics = includeBindAndCheckDiagnostics ? sourceFile.bindDiagnostics : emptyArray;
+                var checkDiagnostics = includeBindAndCheckDiagnostics ? typeChecker.getDiagnostics(sourceFile, cancellationToken) : emptyArray;
                 var fileProcessingDiagnosticsInFile = fileProcessingDiagnostics.getDiagnostics(sourceFile.fileName);
                 var programDiagnosticsInFile = programDiagnostics.getDiagnostics(sourceFile.fileName);
-                return bindDiagnostics.concat(checkDiagnostics).concat(fileProcessingDiagnosticsInFile).concat(programDiagnosticsInFile);
+                var diagnostics = bindDiagnostics.concat(checkDiagnostics, fileProcessingDiagnosticsInFile, programDiagnosticsInFile);
+                return ts.isSourceFileJavaScript(sourceFile)
+                    ? ts.filter(diagnostics, shouldReportDiagnostic)
+                    : diagnostics;
             });
         }
-        function getJavaScriptSemanticDiagnosticsForFile(sourceFile, cancellationToken) {
+        /**
+         * Skip errors if previous line start with '// @ts-ignore' comment, not counting non-empty non-comment lines
+         */
+        function shouldReportDiagnostic(diagnostic) {
+            var file = diagnostic.file, start = diagnostic.start;
+            if (file) {
+                var lineStarts = ts.getLineStarts(file);
+                var line = ts.computeLineAndCharacterOfPosition(lineStarts, start).line;
+                while (line > 0) {
+                    var previousLineText = file.text.slice(lineStarts[line - 1], lineStarts[line]);
+                    var result = ignoreDiagnosticCommentRegEx.exec(previousLineText);
+                    if (!result) {
+                        // non-empty line
+                        return true;
+                    }
+                    if (result[3]) {
+                        // @ts-ignore
+                        return false;
+                    }
+                    line--;
+                }
+            }
+            return true;
+        }
+        function getJavaScriptSyntacticDiagnosticsForFile(sourceFile) {
             return runWithCancellationToken(function () {
                 var diagnostics = [];
+                var parent = sourceFile;
                 walk(sourceFile);
                 return diagnostics;
                 function walk(node) {
-                    if (!node) {
-                        return false;
+                    // Return directly from the case if the given node doesnt want to visit each child
+                    // Otherwise break to visit each child
+                    switch (parent.kind) {
+                        case 146 /* Parameter */:
+                        case 149 /* PropertyDeclaration */:
+                            if (parent.questionToken === node) {
+                                diagnostics.push(createDiagnosticForNode(node, ts.Diagnostics._0_can_only_be_used_in_a_ts_file, "?"));
+                                return;
+                            }
+                        // falls through
+                        case 151 /* MethodDeclaration */:
+                        case 150 /* MethodSignature */:
+                        case 152 /* Constructor */:
+                        case 153 /* GetAccessor */:
+                        case 154 /* SetAccessor */:
+                        case 186 /* FunctionExpression */:
+                        case 228 /* FunctionDeclaration */:
+                        case 187 /* ArrowFunction */:
+                        case 228 /* FunctionDeclaration */:
+                        case 226 /* VariableDeclaration */:
+                            // type annotation
+                            if (parent.type === node) {
+                                diagnostics.push(createDiagnosticForNode(node, ts.Diagnostics.types_can_only_be_used_in_a_ts_file));
+                                return;
+                            }
                     }
                     switch (node.kind) {
-                        case 229 /* ImportEqualsDeclaration */:
-                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.import_can_only_be_used_in_a_ts_file));
-                            return true;
-                        case 235 /* ExportAssignment */:
+                        case 237 /* ImportEqualsDeclaration */:
+                            diagnostics.push(createDiagnosticForNode(node, ts.Diagnostics.import_can_only_be_used_in_a_ts_file));
+                            return;
+                        case 243 /* ExportAssignment */:
                             if (node.isExportEquals) {
-                                diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.export_can_only_be_used_in_a_ts_file));
-                                return true;
-                            }
-                            break;
-                        case 221 /* ClassDeclaration */:
-                            var classDeclaration = node;
-                            if (checkModifiers(classDeclaration.modifiers) ||
-                                checkTypeParameters(classDeclaration.typeParameters)) {
-                                return true;
+                                diagnostics.push(createDiagnosticForNode(node, ts.Diagnostics.export_can_only_be_used_in_a_ts_file));
+                                return;
                             }
                             break;
-                        case 251 /* HeritageClause */:
+                        case 259 /* HeritageClause */:
                             var heritageClause = node;
-                            if (heritageClause.token === 106 /* ImplementsKeyword */) {
-                                diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.implements_clauses_can_only_be_used_in_a_ts_file));
-                                return true;
-                            }
-                            break;
-                        case 222 /* InterfaceDeclaration */:
-                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.interface_declarations_can_only_be_used_in_a_ts_file));
-                            return true;
-                        case 225 /* ModuleDeclaration */:
-                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.module_declarations_can_only_be_used_in_a_ts_file));
-                            return true;
-                        case 223 /* TypeAliasDeclaration */:
-                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.type_aliases_can_only_be_used_in_a_ts_file));
-                            return true;
-                        case 147 /* MethodDeclaration */:
-                        case 146 /* MethodSignature */:
-                        case 148 /* Constructor */:
-                        case 149 /* GetAccessor */:
-                        case 150 /* SetAccessor */:
-                        case 179 /* FunctionExpression */:
-                        case 220 /* FunctionDeclaration */:
-                        case 180 /* ArrowFunction */:
-                        case 220 /* FunctionDeclaration */:
-                            var functionDeclaration = node;
-                            if (checkModifiers(functionDeclaration.modifiers) ||
-                                checkTypeParameters(functionDeclaration.typeParameters) ||
-                                checkTypeAnnotation(functionDeclaration.type)) {
-                                return true;
-                            }
-                            break;
-                        case 200 /* VariableStatement */:
-                            var variableStatement = node;
-                            if (checkModifiers(variableStatement.modifiers)) {
-                                return true;
-                            }
-                            break;
-                        case 218 /* VariableDeclaration */:
-                            var variableDeclaration = node;
-                            if (checkTypeAnnotation(variableDeclaration.type)) {
-                                return true;
-                            }
-                            break;
-                        case 174 /* CallExpression */:
-                        case 175 /* NewExpression */:
-                            var expression = node;
-                            if (expression.typeArguments && expression.typeArguments.length > 0) {
-                                var start = expression.typeArguments.pos;
-                                diagnostics.push(ts.createFileDiagnostic(sourceFile, start, expression.typeArguments.end - start, ts.Diagnostics.type_arguments_can_only_be_used_in_a_ts_file));
-                                return true;
+                            if (heritageClause.token === 108 /* ImplementsKeyword */) {
+                                diagnostics.push(createDiagnosticForNode(node, ts.Diagnostics.implements_clauses_can_only_be_used_in_a_ts_file));
+                                return;
                             }
                             break;
-                        case 142 /* Parameter */:
-                            var parameter = node;
-                            if (parameter.modifiers) {
-                                var start = parameter.modifiers.pos;
-                                diagnostics.push(ts.createFileDiagnostic(sourceFile, start, parameter.modifiers.end - start, ts.Diagnostics.parameter_modifiers_can_only_be_used_in_a_ts_file));
-                                return true;
-                            }
-                            if (parameter.questionToken) {
-                                diagnostics.push(ts.createDiagnosticForNode(parameter.questionToken, ts.Diagnostics._0_can_only_be_used_in_a_ts_file, "?"));
-                                return true;
+                        case 230 /* InterfaceDeclaration */:
+                            diagnostics.push(createDiagnosticForNode(node, ts.Diagnostics.interface_declarations_can_only_be_used_in_a_ts_file));
+                            return;
+                        case 233 /* ModuleDeclaration */:
+                            diagnostics.push(createDiagnosticForNode(node, ts.Diagnostics.module_declarations_can_only_be_used_in_a_ts_file));
+                            return;
+                        case 231 /* TypeAliasDeclaration */:
+                            diagnostics.push(createDiagnosticForNode(node, ts.Diagnostics.type_aliases_can_only_be_used_in_a_ts_file));
+                            return;
+                        case 232 /* EnumDeclaration */:
+                            diagnostics.push(createDiagnosticForNode(node, ts.Diagnostics.enum_declarations_can_only_be_used_in_a_ts_file));
+                            return;
+                        case 184 /* TypeAssertionExpression */:
+                            var typeAssertionExpression = node;
+                            diagnostics.push(createDiagnosticForNode(typeAssertionExpression.type, ts.Diagnostics.type_assertion_expressions_can_only_be_used_in_a_ts_file));
+                            return;
+                    }
+                    var prevParent = parent;
+                    parent = node;
+                    ts.forEachChild(node, walk, walkArray);
+                    parent = prevParent;
+                }
+                function walkArray(nodes) {
+                    if (parent.decorators === nodes && !options.experimentalDecorators) {
+                        diagnostics.push(createDiagnosticForNode(parent, ts.Diagnostics.Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning));
+                    }
+                    switch (parent.kind) {
+                        case 229 /* ClassDeclaration */:
+                        case 151 /* MethodDeclaration */:
+                        case 150 /* MethodSignature */:
+                        case 152 /* Constructor */:
+                        case 153 /* GetAccessor */:
+                        case 154 /* SetAccessor */:
+                        case 186 /* FunctionExpression */:
+                        case 228 /* FunctionDeclaration */:
+                        case 187 /* ArrowFunction */:
+                        case 228 /* FunctionDeclaration */:
+                            // Check type parameters
+                            if (nodes === parent.typeParameters) {
+                                diagnostics.push(createDiagnosticForNodeArray(nodes, ts.Diagnostics.type_parameter_declarations_can_only_be_used_in_a_ts_file));
+                                return;
                             }
-                            if (parameter.type) {
-                                diagnostics.push(ts.createDiagnosticForNode(parameter.type, ts.Diagnostics.types_can_only_be_used_in_a_ts_file));
-                                return true;
+                        // falls through
+                        case 208 /* VariableStatement */:
+                            // Check modifiers
+                            if (nodes === parent.modifiers) {
+                                return checkModifiers(nodes, parent.kind === 208 /* VariableStatement */);
                             }
                             break;
-                        case 145 /* PropertyDeclaration */:
-                            var propertyDeclaration = node;
-                            if (propertyDeclaration.modifiers) {
-                                for (var _i = 0, _a = propertyDeclaration.modifiers; _i < _a.length; _i++) {
+                        case 149 /* PropertyDeclaration */:
+                            // Check modifiers of property declaration
+                            if (nodes === parent.modifiers) {
+                                for (var _i = 0, _a = nodes; _i < _a.length; _i++) {
                                     var modifier = _a[_i];
-                                    if (modifier.kind !== 113 /* StaticKeyword */) {
-                                        diagnostics.push(ts.createDiagnosticForNode(modifier, ts.Diagnostics._0_can_only_be_used_in_a_ts_file, ts.tokenToString(modifier.kind)));
-                                        return true;
+                                    if (modifier.kind !== 115 /* StaticKeyword */) {
+                                        diagnostics.push(createDiagnosticForNode(modifier, ts.Diagnostics._0_can_only_be_used_in_a_ts_file, ts.tokenToString(modifier.kind)));
                                     }
                                 }
+                                return;
                             }
-                            if (checkTypeAnnotation(node.type)) {
-                                return true;
+                            break;
+                        case 146 /* Parameter */:
+                            // Check modifiers of parameter declaration
+                            if (nodes === parent.modifiers) {
+                                diagnostics.push(createDiagnosticForNodeArray(nodes, ts.Diagnostics.parameter_modifiers_can_only_be_used_in_a_ts_file));
+                                return;
                             }
                             break;
-                        case 224 /* EnumDeclaration */:
-                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.enum_declarations_can_only_be_used_in_a_ts_file));
-                            return true;
-                        case 177 /* TypeAssertionExpression */:
-                            var typeAssertionExpression = node;
-                            diagnostics.push(ts.createDiagnosticForNode(typeAssertionExpression.type, ts.Diagnostics.type_assertion_expressions_can_only_be_used_in_a_ts_file));
-                            return true;
-                        case 143 /* Decorator */:
-                            if (!options.experimentalDecorators) {
-                                diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning));
+                        case 181 /* CallExpression */:
+                        case 182 /* NewExpression */:
+                        case 201 /* ExpressionWithTypeArguments */:
+                            // Check type arguments
+                            if (nodes === parent.typeArguments) {
+                                diagnostics.push(createDiagnosticForNodeArray(nodes, ts.Diagnostics.type_arguments_can_only_be_used_in_a_ts_file));
+                                return;
                             }
-                            return true;
-                    }
-                    return ts.forEachChild(node, walk);
-                }
-                function checkTypeParameters(typeParameters) {
-                    if (typeParameters) {
-                        var start = typeParameters.pos;
-                        diagnostics.push(ts.createFileDiagnostic(sourceFile, start, typeParameters.end - start, ts.Diagnostics.type_parameter_declarations_can_only_be_used_in_a_ts_file));
-                        return true;
+                            break;
                     }
-                    return false;
-                }
-                function checkTypeAnnotation(type) {
-                    if (type) {
-                        diagnostics.push(ts.createDiagnosticForNode(type, ts.Diagnostics.types_can_only_be_used_in_a_ts_file));
-                        return true;
+                    for (var _b = 0, nodes_8 = nodes; _b < nodes_8.length; _b++) {
+                        var node = nodes_8[_b];
+                        walk(node);
                     }
-                    return false;
                 }
-                function checkModifiers(modifiers) {
-                    if (modifiers) {
-                        for (var _i = 0, modifiers_1 = modifiers; _i < modifiers_1.length; _i++) {
-                            var modifier = modifiers_1[_i];
-                            switch (modifier.kind) {
-                                case 112 /* PublicKeyword */:
-                                case 110 /* PrivateKeyword */:
-                                case 111 /* ProtectedKeyword */:
-                                case 128 /* ReadonlyKeyword */:
-                                case 122 /* DeclareKeyword */:
-                                    diagnostics.push(ts.createDiagnosticForNode(modifier, ts.Diagnostics._0_can_only_be_used_in_a_ts_file, ts.tokenToString(modifier.kind)));
-                                    return true;
-                                // These are all legal modifiers.
-                                case 113 /* StaticKeyword */:
-                                case 82 /* ExportKeyword */:
-                                case 74 /* ConstKeyword */:
-                                case 77 /* DefaultKeyword */:
-                                case 115 /* AbstractKeyword */:
-                            }
+                function checkModifiers(modifiers, isConstValid) {
+                    for (var _i = 0, modifiers_1 = modifiers; _i < modifiers_1.length; _i++) {
+                        var modifier = modifiers_1[_i];
+                        switch (modifier.kind) {
+                            case 76 /* ConstKeyword */:
+                                if (isConstValid) {
+                                    continue;
+                                }
+                            // to report error,
+                            // falls through
+                            case 114 /* PublicKeyword */:
+                            case 112 /* PrivateKeyword */:
+                            case 113 /* ProtectedKeyword */:
+                            case 131 /* ReadonlyKeyword */:
+                            case 124 /* DeclareKeyword */:
+                            case 117 /* AbstractKeyword */:
+                                diagnostics.push(createDiagnosticForNode(modifier, ts.Diagnostics._0_can_only_be_used_in_a_ts_file, ts.tokenToString(modifier.kind)));
+                                break;
+                            // These are all legal modifiers.
+                            case 115 /* StaticKeyword */:
+                            case 84 /* ExportKeyword */:
+                            case 79 /* DefaultKeyword */:
                         }
                     }
-                    return false;
+                }
+                function createDiagnosticForNodeArray(nodes, message, arg0, arg1, arg2) {
+                    var start = nodes.pos;
+                    return ts.createFileDiagnostic(sourceFile, start, nodes.end - start, message, arg0, arg1, arg2);
+                }
+                // Since these are syntactic diagnostics, parent might not have been set
+                // this means the sourceFile cannot be infered from the node
+                function createDiagnosticForNode(node, message, arg0, arg1, arg2) {
+                    return ts.createDiagnosticForNodeInSourceFile(sourceFile, node, message, arg0, arg1, arg2);
                 }
             });
         }
         function getDeclarationDiagnosticsWorker(sourceFile, cancellationToken) {
+            return getAndCacheDiagnostics(sourceFile, cancellationToken, cachedDeclarationDiagnosticsForFile, getDeclarationDiagnosticsForFileNoCache);
+        }
+        function getDeclarationDiagnosticsForFileNoCache(sourceFile, cancellationToken) {
             return runWithCancellationToken(function () {
                 var resolver = getDiagnosticsProducingTypeChecker().getEmitResolver(sourceFile, cancellationToken);
                 // Don't actually write any files since we're just getting diagnostics.
-                var writeFile = function () { };
-                return ts.getDeclarationDiagnostics(getEmitHost(writeFile), resolver, sourceFile);
+                return ts.getDeclarationDiagnostics(getEmitHost(ts.noop), resolver, sourceFile);
             });
         }
+        function getAndCacheDiagnostics(sourceFile, cancellationToken, cache, getDiagnostics) {
+            var cachedResult = sourceFile
+                ? cache.perFile && cache.perFile.get(sourceFile.path)
+                : cache.allDiagnostics;
+            if (cachedResult) {
+                return cachedResult;
+            }
+            var result = getDiagnostics(sourceFile, cancellationToken) || emptyArray;
+            if (sourceFile) {
+                if (!cache.perFile) {
+                    cache.perFile = ts.createFileMap();
+                }
+                cache.perFile.set(sourceFile.path, result);
+            }
+            else {
+                cache.allDiagnostics = result;
+            }
+            return result;
+        }
         function getDeclarationDiagnosticsForFile(sourceFile, cancellationToken) {
-            return ts.isDeclarationFile(sourceFile) ? [] : getDeclarationDiagnosticsWorker(sourceFile, cancellationToken);
+            return sourceFile.isDeclarationFile ? [] : getDeclarationDiagnosticsWorker(sourceFile, cancellationToken);
         }
         function getOptionsDiagnostics() {
-            var allDiagnostics = [];
-            ts.addRange(allDiagnostics, fileProcessingDiagnostics.getGlobalDiagnostics());
-            ts.addRange(allDiagnostics, programDiagnostics.getGlobalDiagnostics());
-            return ts.sortAndDeduplicateDiagnostics(allDiagnostics);
+            return ts.sortAndDeduplicateDiagnostics(ts.concatenate(fileProcessingDiagnostics.getGlobalDiagnostics(), ts.concatenate(programDiagnostics.getGlobalDiagnostics(), options.configFile ? programDiagnostics.getDiagnostics(options.configFile.fileName) : [])));
         }
         function getGlobalDiagnostics() {
-            var allDiagnostics = [];
-            ts.addRange(allDiagnostics, getDiagnosticsProducingTypeChecker().getGlobalDiagnostics());
-            return ts.sortAndDeduplicateDiagnostics(allDiagnostics);
-        }
-        function hasExtension(fileName) {
-            return ts.getBaseFileName(fileName).indexOf(".") >= 0;
+            return ts.sortAndDeduplicateDiagnostics(getDiagnosticsProducingTypeChecker().getGlobalDiagnostics().slice());
         }
         function processRootFile(fileName, isDefaultLib) {
-            processSourceFile(ts.normalizePath(fileName), isDefaultLib, /*isReference*/ true);
+            processSourceFile(ts.normalizePath(fileName), isDefaultLib);
         }
         function fileReferenceIsEqualTo(a, b) {
             return a.fileName === b.fileName;
@@ -59820,33 +72071,38 @@ var ts;
             }
             var isJavaScriptFile = ts.isSourceFileJavaScript(file);
             var isExternalModuleFile = ts.isExternalModule(file);
+            // file.imports may not be undefined if there exists dynamic import
             var imports;
             var moduleAugmentations;
+            var ambientModules;
             // If we are importing helpers, we need to add a synthetic reference to resolve the
             // helpers library.
             if (options.importHelpers
                 && (options.isolatedModules || isExternalModuleFile)
                 && !file.isDeclarationFile) {
-                var externalHelpersModuleReference = ts.createNode(9 /* StringLiteral */);
-                externalHelpersModuleReference.text = ts.externalHelpersModuleNameText;
-                externalHelpersModuleReference.parent = file;
+                // synthesize 'import "tslib"' declaration
+                var externalHelpersModuleReference = ts.createLiteral(ts.externalHelpersModuleNameText);
+                var importDecl = ts.createImportDeclaration(/*decorators*/ undefined, /*modifiers*/ undefined, /*importClause*/ undefined);
+                externalHelpersModuleReference.parent = importDecl;
+                importDecl.parent = file;
                 imports = [externalHelpersModuleReference];
             }
             for (var _i = 0, _a = file.statements; _i < _a.length; _i++) {
                 var node = _a[_i];
                 collectModuleReferences(node, /*inAmbientModule*/ false);
-                if (isJavaScriptFile) {
-                    collectRequireCalls(node);
+                if ((file.flags & 524288 /* PossiblyContainsDynamicImport */) || isJavaScriptFile) {
+                    collectDynamicImportOrRequireCalls(node);
                 }
             }
             file.imports = imports || emptyArray;
             file.moduleAugmentations = moduleAugmentations || emptyArray;
+            file.ambientModuleNames = ambientModules || emptyArray;
             return;
             function collectModuleReferences(node, inAmbientModule) {
                 switch (node.kind) {
-                    case 230 /* ImportDeclaration */:
-                    case 229 /* ImportEqualsDeclaration */:
-                    case 236 /* ExportDeclaration */:
+                    case 238 /* ImportDeclaration */:
+                    case 237 /* ImportEqualsDeclaration */:
+                    case 244 /* ExportDeclaration */:
                         var moduleNameExpr = ts.getExternalModuleName(node);
                         if (!moduleNameExpr || moduleNameExpr.kind !== 9 /* StringLiteral */) {
                             break;
@@ -59861,8 +72117,8 @@ var ts;
                             (imports || (imports = [])).push(moduleNameExpr);
                         }
                         break;
-                    case 225 /* ModuleDeclaration */:
-                        if (ts.isAmbientModule(node) && (inAmbientModule || ts.hasModifier(node, 2 /* Ambient */) || ts.isDeclarationFile(file))) {
+                    case 233 /* ModuleDeclaration */:
+                        if (ts.isAmbientModule(node) && (inAmbientModule || ts.hasModifier(node, 2 /* Ambient */) || file.isDeclarationFile)) {
                             var moduleName = node.name;
                             // Ambient module declarations can be interpreted as augmentations for some existing external modules.
                             // This will happen in two cases:
@@ -59873,6 +72129,10 @@ var ts;
                                 (moduleAugmentations || (moduleAugmentations = [])).push(moduleName);
                             }
                             else if (!inAmbientModule) {
+                                if (file.isDeclarationFile) {
+                                    // for global .d.ts files record name of ambient module
+                                    (ambientModules || (ambientModules = [])).push(moduleName.text);
+                                }
                                 // An AmbientExternalModuleDeclaration declares an external module.
                                 // This type of declaration is permitted only in the global module.
                                 // The StringLiteral must specify a top - level external module name.
@@ -59889,58 +72149,65 @@ var ts;
                         }
                 }
             }
-            function collectRequireCalls(node) {
+            function collectDynamicImportOrRequireCalls(node) {
                 if (ts.isRequireCall(node, /*checkArgumentIsStringLiteral*/ true)) {
                     (imports || (imports = [])).push(node.arguments[0]);
                 }
+                else if (ts.isImportCall(node) && node.arguments.length === 1 && node.arguments[0].kind === 9 /* StringLiteral */) {
+                    (imports || (imports = [])).push(node.arguments[0]);
+                }
                 else {
-                    ts.forEachChild(node, collectRequireCalls);
+                    ts.forEachChild(node, collectDynamicImportOrRequireCalls);
                 }
             }
         }
-        /**
-          * 'isReference' indicates whether the file was brought in via a reference directive (rather than an import declaration)
-          */
-        function processSourceFile(fileName, isDefaultLib, isReference, refFile, refPos, refEnd) {
-            var diagnosticArgument;
-            var diagnostic;
-            if (hasExtension(fileName)) {
+        /** This should have similar behavior to 'processSourceFile' without diagnostics or mutation. */
+        function getSourceFileFromReference(referencingFile, ref) {
+            return getSourceFileFromReferenceWorker(resolveTripleslashReference(ref.fileName, referencingFile.fileName), function (fileName) { return filesByName.get(ts.toPath(fileName, currentDirectory, getCanonicalFileName)); });
+        }
+        function getSourceFileFromReferenceWorker(fileName, getSourceFile, fail, refFile) {
+            if (ts.hasExtension(fileName)) {
                 if (!options.allowNonTsExtensions && !ts.forEach(supportedExtensions, function (extension) { return ts.fileExtensionIs(host.getCanonicalFileName(fileName), extension); })) {
-                    diagnostic = ts.Diagnostics.File_0_has_unsupported_extension_The_only_supported_extensions_are_1;
-                    diagnosticArgument = [fileName, "'" + supportedExtensions.join("', '") + "'"];
-                }
-                else if (!findSourceFile(fileName, ts.toPath(fileName, currentDirectory, getCanonicalFileName), isDefaultLib, isReference, refFile, refPos, refEnd)) {
-                    diagnostic = ts.Diagnostics.File_0_not_found;
-                    diagnosticArgument = [fileName];
-                }
-                else if (refFile && host.getCanonicalFileName(fileName) === host.getCanonicalFileName(refFile.fileName)) {
-                    diagnostic = ts.Diagnostics.A_file_cannot_have_a_reference_to_itself;
-                    diagnosticArgument = [fileName];
+                    if (fail)
+                        fail(ts.Diagnostics.File_0_has_unsupported_extension_The_only_supported_extensions_are_1, fileName, "'" + supportedExtensions.join("', '") + "'");
+                    return undefined;
                 }
-            }
-            else {
-                var nonTsFile = options.allowNonTsExtensions && findSourceFile(fileName, ts.toPath(fileName, currentDirectory, getCanonicalFileName), isDefaultLib, isReference, refFile, refPos, refEnd);
-                if (!nonTsFile) {
-                    if (options.allowNonTsExtensions) {
-                        diagnostic = ts.Diagnostics.File_0_not_found;
-                        diagnosticArgument = [fileName];
+                var sourceFile = getSourceFile(fileName);
+                if (fail) {
+                    if (!sourceFile) {
+                        fail(ts.Diagnostics.File_0_not_found, fileName);
                     }
-                    else if (!ts.forEach(supportedExtensions, function (extension) { return findSourceFile(fileName + extension, ts.toPath(fileName + extension, currentDirectory, getCanonicalFileName), isDefaultLib, isReference, refFile, refPos, refEnd); })) {
-                        diagnostic = ts.Diagnostics.File_0_not_found;
-                        fileName += ".ts";
-                        diagnosticArgument = [fileName];
+                    else if (refFile && host.getCanonicalFileName(fileName) === host.getCanonicalFileName(refFile.fileName)) {
+                        fail(ts.Diagnostics.A_file_cannot_have_a_reference_to_itself, fileName);
                     }
                 }
+                return sourceFile;
             }
-            if (diagnostic) {
-                if (refFile !== undefined && refEnd !== undefined && refPos !== undefined) {
-                    fileProcessingDiagnostics.add(ts.createFileDiagnostic.apply(void 0, [refFile, refPos, refEnd - refPos, diagnostic].concat(diagnosticArgument)));
-                }
-                else {
-                    fileProcessingDiagnostics.add(ts.createCompilerDiagnostic.apply(void 0, [diagnostic].concat(diagnosticArgument)));
+            else {
+                var sourceFileNoExtension = options.allowNonTsExtensions && getSourceFile(fileName);
+                if (sourceFileNoExtension)
+                    return sourceFileNoExtension;
+                if (fail && options.allowNonTsExtensions) {
+                    fail(ts.Diagnostics.File_0_not_found, fileName);
+                    return undefined;
                 }
+                var sourceFileWithAddedExtension = ts.forEach(supportedExtensions, function (extension) { return getSourceFile(fileName + extension); });
+                if (fail && !sourceFileWithAddedExtension)
+                    fail(ts.Diagnostics.File_0_not_found, fileName + ".ts" /* Ts */);
+                return sourceFileWithAddedExtension;
             }
         }
+        /** This has side effects through `findSourceFile`. */
+        function processSourceFile(fileName, isDefaultLib, refFile, refPos, refEnd) {
+            getSourceFileFromReferenceWorker(fileName, function (fileName) { return findSourceFile(fileName, ts.toPath(fileName, currentDirectory, getCanonicalFileName), isDefaultLib, refFile, refPos, refEnd); }, function (diagnostic) {
+                var args = [];
+                for (var _i = 1; _i < arguments.length; _i++) {
+                    args[_i - 1] = arguments[_i];
+                }
+                fileProcessingDiagnostics.add(refFile !== undefined && refEnd !== undefined && refPos !== undefined
+                    ? ts.createFileDiagnostic.apply(void 0, [refFile, refPos, refEnd - refPos, diagnostic].concat(args)) : ts.createCompilerDiagnostic.apply(void 0, [diagnostic].concat(args)));
+            }, refFile);
+        }
         function reportFileNamesDifferOnlyInCasingError(fileName, existingFileName, refFile, refPos, refEnd) {
             if (refFile !== undefined && refPos !== undefined && refEnd !== undefined) {
                 fileProcessingDiagnostics.add(ts.createFileDiagnostic(refFile, refPos, refEnd - refPos, ts.Diagnostics.File_name_0_differs_from_already_included_file_name_1_only_in_casing, fileName, existingFileName));
@@ -59950,7 +72217,7 @@ var ts;
             }
         }
         // Get source file from normalized fileName
-        function findSourceFile(fileName, path, isDefaultLib, isReference, refFile, refPos, refEnd) {
+        function findSourceFile(fileName, path, isDefaultLib, refFile, refPos, refEnd) {
             if (filesByName.contains(path)) {
                 var file_1 = filesByName.get(path);
                 // try to check if we've already seen this file but with a different casing in path
@@ -59960,19 +72227,19 @@ var ts;
                 }
                 // If the file was previously found via a node_modules search, but is now being processed as a root file,
                 // then everything it sucks in may also be marked incorrectly, and needs to be checked again.
-                if (file_1 && sourceFilesFoundSearchingNodeModules[file_1.path] && currentNodeModulesDepth == 0) {
-                    sourceFilesFoundSearchingNodeModules[file_1.path] = false;
+                if (file_1 && sourceFilesFoundSearchingNodeModules.get(file_1.path) && currentNodeModulesDepth === 0) {
+                    sourceFilesFoundSearchingNodeModules.set(file_1.path, false);
                     if (!options.noResolve) {
-                        processReferencedFiles(file_1, ts.getDirectoryPath(fileName), isDefaultLib);
+                        processReferencedFiles(file_1, isDefaultLib);
                         processTypeReferenceDirectives(file_1);
                     }
-                    modulesWithElidedImports[file_1.path] = false;
-                    processImportedModules(file_1, ts.getDirectoryPath(fileName));
+                    modulesWithElidedImports.set(file_1.path, false);
+                    processImportedModules(file_1);
                 }
-                else if (file_1 && modulesWithElidedImports[file_1.path]) {
-                    if (currentNodeModulesDepth < maxNodeModulesJsDepth) {
-                        modulesWithElidedImports[file_1.path] = false;
-                        processImportedModules(file_1, ts.getDirectoryPath(fileName));
+                else if (file_1 && modulesWithElidedImports.get(file_1.path)) {
+                    if (currentNodeModulesDepth < maxNodeModuleJsDepth) {
+                        modulesWithElidedImports.set(file_1.path, false);
+                        processImportedModules(file_1);
                     }
                 }
                 return file_1;
@@ -59988,7 +72255,7 @@ var ts;
             });
             filesByName.set(path, file);
             if (file) {
-                sourceFilesFoundSearchingNodeModules[path] = (currentNodeModulesDepth > 0);
+                sourceFilesFoundSearchingNodeModules.set(path, currentNodeModulesDepth > 0);
                 file.path = path;
                 if (host.useCaseSensitiveFileNames()) {
                     // for case-sensitive file systems check if we've already seen some file with similar filename ignoring case
@@ -60001,13 +72268,12 @@ var ts;
                     }
                 }
                 skipDefaultLib = skipDefaultLib || file.hasNoDefaultLib;
-                var basePath = ts.getDirectoryPath(fileName);
                 if (!options.noResolve) {
-                    processReferencedFiles(file, basePath, isDefaultLib);
+                    processReferencedFiles(file, isDefaultLib);
                     processTypeReferenceDirectives(file);
                 }
                 // always process imported modules to record module name resolutions
-                processImportedModules(file, basePath);
+                processImportedModules(file);
                 if (isDefaultLib) {
                     files.unshift(file);
                 }
@@ -60017,10 +72283,10 @@ var ts;
             }
             return file;
         }
-        function processReferencedFiles(file, basePath, isDefaultLib) {
+        function processReferencedFiles(file, isDefaultLib) {
             ts.forEach(file.referencedFiles, function (ref) {
                 var referencedFileName = resolveTripleslashReference(ref.fileName, file.fileName);
-                processSourceFile(referencedFileName, isDefaultLib, /*isReference*/ true, file, ref.pos, ref.end);
+                processSourceFile(referencedFileName, isDefaultLib, file, ref.pos, ref.end);
             });
         }
         function processTypeReferenceDirectives(file) {
@@ -60038,7 +72304,7 @@ var ts;
         }
         function processTypeReferenceDirective(typeReferenceDirective, resolvedTypeReferenceDirective, refFile, refPos, refEnd) {
             // If we already found this library as a primary reference - nothing to do
-            var previousResolution = resolvedTypeReferenceDirectives[typeReferenceDirective];
+            var previousResolution = resolvedTypeReferenceDirectives.get(typeReferenceDirective);
             if (previousResolution && previousResolution.primary) {
                 return;
             }
@@ -60046,22 +72312,25 @@ var ts;
             if (resolvedTypeReferenceDirective) {
                 if (resolvedTypeReferenceDirective.primary) {
                     // resolved from the primary path
-                    processSourceFile(resolvedTypeReferenceDirective.resolvedFileName, /*isDefaultLib*/ false, /*isReference*/ true, refFile, refPos, refEnd);
+                    processSourceFile(resolvedTypeReferenceDirective.resolvedFileName, /*isDefaultLib*/ false, refFile, refPos, refEnd);
                 }
                 else {
                     // If we already resolved to this file, it must have been a secondary reference. Check file contents
                     // for sameness and possibly issue an error
                     if (previousResolution) {
-                        var otherFileText = host.readFile(resolvedTypeReferenceDirective.resolvedFileName);
-                        if (otherFileText !== getSourceFile(previousResolution.resolvedFileName).text) {
-                            fileProcessingDiagnostics.add(createDiagnostic(refFile, refPos, refEnd, ts.Diagnostics.Conflicting_definitions_for_0_found_at_1_and_2_Consider_installing_a_specific_version_of_this_library_to_resolve_the_conflict, typeReferenceDirective, resolvedTypeReferenceDirective.resolvedFileName, previousResolution.resolvedFileName));
+                        // Don't bother reading the file again if it's the same file.
+                        if (resolvedTypeReferenceDirective.resolvedFileName !== previousResolution.resolvedFileName) {
+                            var otherFileText = host.readFile(resolvedTypeReferenceDirective.resolvedFileName);
+                            if (otherFileText !== getSourceFile(previousResolution.resolvedFileName).text) {
+                                fileProcessingDiagnostics.add(createDiagnostic(refFile, refPos, refEnd, ts.Diagnostics.Conflicting_definitions_for_0_found_at_1_and_2_Consider_installing_a_specific_version_of_this_library_to_resolve_the_conflict, typeReferenceDirective, resolvedTypeReferenceDirective.resolvedFileName, previousResolution.resolvedFileName));
+                            }
                         }
                         // don't overwrite previous resolution result
                         saveResolution = false;
                     }
                     else {
                         // First resolution of this library
-                        processSourceFile(resolvedTypeReferenceDirective.resolvedFileName, /*isDefaultLib*/ false, /*isReference*/ true, refFile, refPos, refEnd);
+                        processSourceFile(resolvedTypeReferenceDirective.resolvedFileName, /*isDefaultLib*/ false, refFile, refPos, refEnd);
                     }
                 }
             }
@@ -60069,7 +72338,7 @@ var ts;
                 fileProcessingDiagnostics.add(createDiagnostic(refFile, refPos, refEnd, ts.Diagnostics.Cannot_find_type_definition_file_for_0, typeReferenceDirective));
             }
             if (saveResolution) {
-                resolvedTypeReferenceDirectives[typeReferenceDirective] = resolvedTypeReferenceDirective;
+                resolvedTypeReferenceDirectives.set(typeReferenceDirective, resolvedTypeReferenceDirective);
             }
         }
         function createDiagnostic(refFile, refPos, refEnd, message) {
@@ -60087,34 +72356,43 @@ var ts;
         function getCanonicalFileName(fileName) {
             return host.getCanonicalFileName(fileName);
         }
-        function processImportedModules(file, basePath) {
+        function processImportedModules(file) {
             collectExternalModuleReferences(file);
             if (file.imports.length || file.moduleAugmentations.length) {
-                file.resolvedModules = ts.createMap();
-                var moduleNames = ts.map(ts.concatenate(file.imports, file.moduleAugmentations), getTextOfLiteral);
-                var resolutions = resolveModuleNamesWorker(moduleNames, ts.getNormalizedAbsolutePath(file.fileName, currentDirectory));
+                // Because global augmentation doesn't have string literal name, we can check for global augmentation as such.
+                var nonGlobalAugmentation = ts.filter(file.moduleAugmentations, function (moduleAugmentation) { return moduleAugmentation.kind === 9 /* StringLiteral */; });
+                var moduleNames = ts.map(ts.concatenate(file.imports, nonGlobalAugmentation), getTextOfLiteral);
+                var oldProgramState = { program: oldProgram, file: file, modifiedFilePaths: modifiedFilePaths };
+                var resolutions = resolveModuleNamesReusingOldState(moduleNames, ts.getNormalizedAbsolutePath(file.fileName, currentDirectory), file, oldProgramState);
+                ts.Debug.assert(resolutions.length === moduleNames.length);
                 for (var i = 0; i < moduleNames.length; i++) {
                     var resolution = resolutions[i];
                     ts.setResolvedModule(file, moduleNames[i], resolution);
-                    var resolvedPath = resolution ? ts.toPath(resolution.resolvedFileName, currentDirectory, getCanonicalFileName) : undefined;
+                    if (!resolution) {
+                        continue;
+                    }
+                    var isFromNodeModulesSearch = resolution.isExternalLibraryImport;
+                    var isJsFileFromNodeModules = isFromNodeModulesSearch && !ts.extensionIsTypeScript(resolution.extension);
+                    var resolvedFileName = resolution.resolvedFileName;
+                    if (isFromNodeModulesSearch) {
+                        currentNodeModulesDepth++;
+                    }
                     // add file to program only if:
                     // - resolution was successful
                     // - noResolve is falsy
                     // - module name comes from the list of imports
                     // - it's not a top level JavaScript module that exceeded the search max
-                    var isFromNodeModulesSearch = resolution && resolution.isExternalLibraryImport;
-                    var isJsFileFromNodeModules = isFromNodeModulesSearch && ts.hasJavaScriptFileExtension(resolution.resolvedFileName);
-                    if (isFromNodeModulesSearch) {
-                        currentNodeModulesDepth++;
-                    }
-                    var elideImport = isJsFileFromNodeModules && currentNodeModulesDepth > maxNodeModulesJsDepth;
-                    var shouldAddFile = resolution && !options.noResolve && i < file.imports.length && !elideImport;
+                    var elideImport = isJsFileFromNodeModules && currentNodeModulesDepth > maxNodeModuleJsDepth;
+                    // Don't add the file if it has a bad extension (e.g. 'tsx' if we don't have '--allowJs')
+                    // This may still end up being an untyped module -- the file won't be included but imports will be allowed.
+                    var shouldAddFile = resolvedFileName && !getResolutionDiagnostic(options, resolution) && !options.noResolve && i < file.imports.length && !elideImport;
                     if (elideImport) {
-                        modulesWithElidedImports[file.path] = true;
+                        modulesWithElidedImports.set(file.path, true);
                     }
                     else if (shouldAddFile) {
-                        findSourceFile(resolution.resolvedFileName, resolvedPath, 
-                        /*isDefaultLib*/ false, /*isReference*/ false, file, ts.skipTrivia(file.text, file.imports[i].pos), file.imports[i].end);
+                        var path = ts.toPath(resolvedFileName, currentDirectory, getCanonicalFileName);
+                        var pos = ts.skipTrivia(file.text, file.imports[i].pos);
+                        findSourceFile(resolvedFileName, path, /*isDefaultLib*/ false, file, pos, file.imports[i].end);
                     }
                     if (isFromNodeModulesSearch) {
                         currentNodeModulesDepth--;
@@ -60125,12 +72403,11 @@ var ts;
                 // no imports - drop cached module resolutions
                 file.resolvedModules = undefined;
             }
-            return;
         }
         function computeCommonSourceDirectory(sourceFiles) {
             var fileNames = [];
-            for (var _i = 0, sourceFiles_6 = sourceFiles; _i < sourceFiles_6.length; _i++) {
-                var file = sourceFiles_6[_i];
+            for (var _i = 0, sourceFiles_2 = sourceFiles; _i < sourceFiles_2.length; _i++) {
+                var file = sourceFiles_2[_i];
                 if (!file.isDeclarationFile) {
                     fileNames.push(file.fileName);
                 }
@@ -60141,9 +72418,9 @@ var ts;
             var allFilesBelongToPath = true;
             if (sourceFiles) {
                 var absoluteRootDirectoryPath = host.getCanonicalFileName(ts.getNormalizedAbsolutePath(rootDirectory, currentDirectory));
-                for (var _i = 0, sourceFiles_7 = sourceFiles; _i < sourceFiles_7.length; _i++) {
-                    var sourceFile = sourceFiles_7[_i];
-                    if (!ts.isDeclarationFile(sourceFile)) {
+                for (var _i = 0, sourceFiles_3 = sourceFiles; _i < sourceFiles_3.length; _i++) {
+                    var sourceFile = sourceFiles_3[_i];
+                    if (!sourceFile.isDeclarationFile) {
                         var absoluteSourceFilePath = host.getCanonicalFileName(ts.getNormalizedAbsolutePath(sourceFile.fileName, currentDirectory));
                         if (absoluteSourceFilePath.indexOf(absoluteRootDirectoryPath) !== 0) {
                             programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.File_0_is_not_under_rootDir_1_rootDir_is_expected_to_contain_all_source_files, sourceFile.fileName, options.rootDir));
@@ -60157,28 +72434,28 @@ var ts;
         function verifyCompilerOptions() {
             if (options.isolatedModules) {
                 if (options.declaration) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "declaration", "isolatedModules"));
+                    createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "declaration", "isolatedModules");
                 }
                 if (options.noEmitOnError) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "noEmitOnError", "isolatedModules"));
+                    createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "noEmitOnError", "isolatedModules");
                 }
                 if (options.out) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "out", "isolatedModules"));
+                    createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "out", "isolatedModules");
                 }
                 if (options.outFile) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "outFile", "isolatedModules"));
+                    createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "outFile", "isolatedModules");
                 }
             }
             if (options.inlineSourceMap) {
                 if (options.sourceMap) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "sourceMap", "inlineSourceMap"));
+                    createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "sourceMap", "inlineSourceMap");
                 }
                 if (options.mapRoot) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "mapRoot", "inlineSourceMap"));
+                    createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "mapRoot", "inlineSourceMap");
                 }
             }
             if (options.paths && options.baseUrl === undefined) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_paths_cannot_be_used_without_specifying_baseUrl_option));
+                createDiagnosticForOptionName(ts.Diagnostics.Option_paths_cannot_be_used_without_specifying_baseUrl_option, "paths");
             }
             if (options.paths) {
                 for (var key in options.paths) {
@@ -60186,70 +72463,74 @@ var ts;
                         continue;
                     }
                     if (!ts.hasZeroOrOneAsteriskCharacter(key)) {
-                        programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Pattern_0_can_have_at_most_one_Asterisk_character, key));
+                        createDiagnosticForOptionPaths(/*onKey*/ true, key, ts.Diagnostics.Pattern_0_can_have_at_most_one_Asterisk_character, key);
                     }
                     if (ts.isArray(options.paths[key])) {
-                        if (options.paths[key].length === 0) {
-                            programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Substitutions_for_pattern_0_shouldn_t_be_an_empty_array, key));
+                        var len = options.paths[key].length;
+                        if (len === 0) {
+                            createDiagnosticForOptionPaths(/*onKey*/ false, key, ts.Diagnostics.Substitutions_for_pattern_0_shouldn_t_be_an_empty_array, key);
                         }
-                        for (var _i = 0, _a = options.paths[key]; _i < _a.length; _i++) {
-                            var subst = _a[_i];
+                        for (var i = 0; i < len; i++) {
+                            var subst = options.paths[key][i];
                             var typeOfSubst = typeof subst;
                             if (typeOfSubst === "string") {
                                 if (!ts.hasZeroOrOneAsteriskCharacter(subst)) {
-                                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character, subst, key));
+                                    createDiagnosticForOptionPathKeyValue(key, i, ts.Diagnostics.Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character, subst, key);
                                 }
                             }
                             else {
-                                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2, subst, key, typeOfSubst));
+                                createDiagnosticForOptionPathKeyValue(key, i, ts.Diagnostics.Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2, subst, key, typeOfSubst);
                             }
                         }
                     }
                     else {
-                        programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Substitutions_for_pattern_0_should_be_an_array, key));
+                        createDiagnosticForOptionPaths(/*onKey*/ false, key, ts.Diagnostics.Substitutions_for_pattern_0_should_be_an_array, key);
                     }
                 }
             }
             if (!options.sourceMap && !options.inlineSourceMap) {
                 if (options.inlineSources) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided, "inlineSources"));
+                    createDiagnosticForOptionName(ts.Diagnostics.Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided, "inlineSources");
                 }
                 if (options.sourceRoot) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided, "sourceRoot"));
+                    createDiagnosticForOptionName(ts.Diagnostics.Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided, "sourceRoot");
                 }
             }
             if (options.out && options.outFile) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "out", "outFile"));
+                createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "out", "outFile");
             }
             if (options.mapRoot && !options.sourceMap) {
                 // Error to specify --mapRoot without --sourcemap
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "mapRoot", "sourceMap"));
+                createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "mapRoot", "sourceMap");
             }
             if (options.declarationDir) {
                 if (!options.declaration) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "declarationDir", "declaration"));
+                    createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "declarationDir", "declaration");
                 }
                 if (options.out || options.outFile) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "declarationDir", options.out ? "out" : "outFile"));
+                    createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "declarationDir", options.out ? "out" : "outFile");
                 }
             }
             if (options.lib && options.noLib) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "lib", "noLib"));
+                createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "lib", "noLib");
+            }
+            if (options.noImplicitUseStrict && (options.alwaysStrict === undefined ? options.strict : options.alwaysStrict)) {
+                createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "noImplicitUseStrict", "alwaysStrict");
             }
             var languageVersion = options.target || 0 /* ES3 */;
             var outFile = options.outFile || options.out;
-            var firstNonAmbientExternalModuleSourceFile = ts.forEach(files, function (f) { return ts.isExternalModule(f) && !ts.isDeclarationFile(f) ? f : undefined; });
+            var firstNonAmbientExternalModuleSourceFile = ts.forEach(files, function (f) { return ts.isExternalModule(f) && !f.isDeclarationFile ? f : undefined; });
             if (options.isolatedModules) {
-                if (options.module === ts.ModuleKind.None && languageVersion < 2 /* ES6 */) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES2015_or_higher));
+                if (options.module === ts.ModuleKind.None && languageVersion < 2 /* ES2015 */) {
+                    createDiagnosticForOptionName(ts.Diagnostics.Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES2015_or_higher, "isolatedModules", "target");
                 }
-                var firstNonExternalModuleSourceFile = ts.forEach(files, function (f) { return !ts.isExternalModule(f) && !ts.isDeclarationFile(f) ? f : undefined; });
+                var firstNonExternalModuleSourceFile = ts.forEach(files, function (f) { return !ts.isExternalModule(f) && !f.isDeclarationFile ? f : undefined; });
                 if (firstNonExternalModuleSourceFile) {
                     var span_7 = ts.getErrorSpanForNode(firstNonExternalModuleSourceFile, firstNonExternalModuleSourceFile);
                     programDiagnostics.add(ts.createFileDiagnostic(firstNonExternalModuleSourceFile, span_7.start, span_7.length, ts.Diagnostics.Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided));
                 }
             }
-            else if (firstNonAmbientExternalModuleSourceFile && languageVersion < 2 /* ES6 */ && options.module === ts.ModuleKind.None) {
+            else if (firstNonAmbientExternalModuleSourceFile && languageVersion < 2 /* ES2015 */ && options.module === ts.ModuleKind.None) {
                 // We cannot use createDiagnosticFromNode because nodes do not have parents yet
                 var span_8 = ts.getErrorSpanForNode(firstNonAmbientExternalModuleSourceFile, firstNonAmbientExternalModuleSourceFile.externalModuleIndicator);
                 programDiagnostics.add(ts.createFileDiagnostic(firstNonAmbientExternalModuleSourceFile, span_8.start, span_8.length, ts.Diagnostics.Cannot_use_imports_exports_or_module_augmentations_when_module_is_none));
@@ -60257,7 +72538,7 @@ var ts;
             // Cannot specify module gen that isn't amd or system with --out
             if (outFile) {
                 if (options.module && !(options.module === ts.ModuleKind.AMD || options.module === ts.ModuleKind.System)) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Only_amd_and_system_modules_are_supported_alongside_0, options.out ? "out" : "outFile"));
+                    createDiagnosticForOptionName(ts.Diagnostics.Only_amd_and_system_modules_are_supported_alongside_0, options.out ? "out" : "outFile", "module");
                 }
                 else if (options.module === undefined && firstNonAmbientExternalModuleSourceFile) {
                     var span_9 = ts.getErrorSpanForNode(firstNonAmbientExternalModuleSourceFile, firstNonAmbientExternalModuleSourceFile.externalModuleIndicator);
@@ -60273,24 +72554,35 @@ var ts;
                 var dir = getCommonSourceDirectory();
                 // If we failed to find a good common directory, but outDir is specified and at least one of our files is on a windows drive/URL/other resource, add a failure
                 if (options.outDir && dir === "" && ts.forEach(files, function (file) { return ts.getRootLength(file.fileName) > 1; })) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_find_the_common_subdirectory_path_for_the_input_files));
+                    createDiagnosticForOptionName(ts.Diagnostics.Cannot_find_the_common_subdirectory_path_for_the_input_files, "outDir");
                 }
             }
             if (!options.noEmit && options.allowJs && options.declaration) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "allowJs", "declaration"));
+                createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "allowJs", "declaration");
+            }
+            if (options.checkJs && !options.allowJs) {
+                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "checkJs", "allowJs"));
             }
             if (options.emitDecoratorMetadata &&
                 !options.experimentalDecorators) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "emitDecoratorMetadata", "experimentalDecorators"));
+                createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "emitDecoratorMetadata", "experimentalDecorators");
+            }
+            if (options.jsxFactory) {
+                if (options.reactNamespace) {
+                    createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "reactNamespace", "jsxFactory");
+                }
+                if (!ts.parseIsolatedEntityName(options.jsxFactory, languageVersion)) {
+                    createOptionValueDiagnostic("jsxFactory", ts.Diagnostics.Invalid_value_for_jsxFactory_0_is_not_a_valid_identifier_or_qualified_name, options.jsxFactory);
+                }
             }
-            if (options.reactNamespace && !ts.isIdentifierText(options.reactNamespace, languageVersion)) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier, options.reactNamespace));
+            else if (options.reactNamespace && !ts.isIdentifierText(options.reactNamespace, languageVersion)) {
+                createOptionValueDiagnostic("reactNamespace", ts.Diagnostics.Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier, options.reactNamespace);
             }
             // If the emit is enabled make sure that every output file is unique and not overwriting any of the input files
             if (!options.noEmit && !options.suppressOutputPathCheck) {
                 var emitHost = getEmitHost();
                 var emitFilesSeen_1 = ts.createFileMap(!host.useCaseSensitiveFileNames() ? function (key) { return key.toLocaleLowerCase(); } : undefined);
-                ts.forEachExpectedEmitFile(emitHost, function (emitFileNames, sourceFiles, isBundledEmit) {
+                ts.forEachEmittedFile(emitHost, function (emitFileNames) {
                     verifyEmitFilePath(emitFileNames.jsFilePath, emitFilesSeen_1);
                     verifyEmitFilePath(emitFileNames.declarationFilePath, emitFilesSeen_1);
                 });
@@ -60301,12 +72593,18 @@ var ts;
                     var emitFilePath = ts.toPath(emitFileName, currentDirectory, getCanonicalFileName);
                     // Report error if the output overwrites input file
                     if (filesByName.contains(emitFilePath)) {
-                        createEmitBlockingDiagnostics(emitFileName, emitFilePath, ts.Diagnostics.Cannot_write_file_0_because_it_would_overwrite_input_file);
+                        var chain_1;
+                        if (!options.configFilePath) {
+                            // The program is from either an inferred project or an external project
+                            chain_1 = ts.chainDiagnosticMessages(/*details*/ undefined, ts.Diagnostics.Adding_a_tsconfig_json_file_will_help_organize_projects_that_contain_both_TypeScript_and_JavaScript_files_Learn_more_at_https_Colon_Slash_Slashaka_ms_Slashtsconfig);
+                        }
+                        chain_1 = ts.chainDiagnosticMessages(chain_1, ts.Diagnostics.Cannot_write_file_0_because_it_would_overwrite_input_file, emitFileName);
+                        blockEmittingOfFile(emitFileName, ts.createCompilerDiagnosticFromMessageChain(chain_1));
                     }
                     // Report error if multiple files write into same file
                     if (emitFilesSeen.contains(emitFilePath)) {
                         // Already seen the same emit file - report error
-                        createEmitBlockingDiagnostics(emitFileName, emitFilePath, ts.Diagnostics.Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files);
+                        blockEmittingOfFile(emitFileName, ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files, emitFileName));
                     }
                     else {
                         emitFilesSeen.set(emitFilePath, true);
@@ -60314,12 +72612,118 @@ var ts;
                 }
             }
         }
-        function createEmitBlockingDiagnostics(emitFileName, emitFilePath, message) {
+        function createDiagnosticForOptionPathKeyValue(key, valueIndex, message, arg0, arg1, arg2) {
+            var needCompilerDiagnostic = true;
+            var pathsSyntax = getOptionPathsSyntax();
+            for (var _i = 0, pathsSyntax_1 = pathsSyntax; _i < pathsSyntax_1.length; _i++) {
+                var pathProp = pathsSyntax_1[_i];
+                if (ts.isObjectLiteralExpression(pathProp.initializer)) {
+                    for (var _a = 0, _b = ts.getPropertyAssignment(pathProp.initializer, key); _a < _b.length; _a++) {
+                        var keyProps = _b[_a];
+                        if (ts.isArrayLiteralExpression(keyProps.initializer) &&
+                            keyProps.initializer.elements.length > valueIndex) {
+                            programDiagnostics.add(ts.createDiagnosticForNodeInSourceFile(options.configFile, keyProps.initializer.elements[valueIndex], message, arg0, arg1, arg2));
+                            needCompilerDiagnostic = false;
+                        }
+                    }
+                }
+            }
+            if (needCompilerDiagnostic) {
+                programDiagnostics.add(ts.createCompilerDiagnostic(message, arg0, arg1, arg2));
+            }
+        }
+        function createDiagnosticForOptionPaths(onKey, key, message, arg0) {
+            var needCompilerDiagnostic = true;
+            var pathsSyntax = getOptionPathsSyntax();
+            for (var _i = 0, pathsSyntax_2 = pathsSyntax; _i < pathsSyntax_2.length; _i++) {
+                var pathProp = pathsSyntax_2[_i];
+                if (ts.isObjectLiteralExpression(pathProp.initializer) &&
+                    createOptionDiagnosticInObjectLiteralSyntax(pathProp.initializer, onKey, key, /*key2*/ undefined, message, arg0)) {
+                    needCompilerDiagnostic = false;
+                }
+            }
+            if (needCompilerDiagnostic) {
+                programDiagnostics.add(ts.createCompilerDiagnostic(message, arg0));
+            }
+        }
+        function getOptionPathsSyntax() {
+            var compilerOptionsObjectLiteralSyntax = getCompilerOptionsObjectLiteralSyntax();
+            if (compilerOptionsObjectLiteralSyntax) {
+                return ts.getPropertyAssignment(compilerOptionsObjectLiteralSyntax, "paths");
+            }
+            return emptyArray;
+        }
+        function createDiagnosticForOptionName(message, option1, option2) {
+            createDiagnosticForOption(/*onKey*/ true, option1, option2, message, option1, option2);
+        }
+        function createOptionValueDiagnostic(option1, message, arg0) {
+            createDiagnosticForOption(/*onKey*/ false, option1, /*option2*/ undefined, message, arg0);
+        }
+        function createDiagnosticForOption(onKey, option1, option2, message, arg0, arg1) {
+            var compilerOptionsObjectLiteralSyntax = getCompilerOptionsObjectLiteralSyntax();
+            var needCompilerDiagnostic = !compilerOptionsObjectLiteralSyntax ||
+                !createOptionDiagnosticInObjectLiteralSyntax(compilerOptionsObjectLiteralSyntax, onKey, option1, option2, message, arg0, arg1);
+            if (needCompilerDiagnostic) {
+                programDiagnostics.add(ts.createCompilerDiagnostic(message, arg0, arg1));
+            }
+        }
+        function getCompilerOptionsObjectLiteralSyntax() {
+            if (_compilerOptionsObjectLiteralSyntax === undefined) {
+                _compilerOptionsObjectLiteralSyntax = null; // tslint:disable-line:no-null-keyword
+                if (options.configFile && options.configFile.jsonObject) {
+                    for (var _i = 0, _a = ts.getPropertyAssignment(options.configFile.jsonObject, "compilerOptions"); _i < _a.length; _i++) {
+                        var prop = _a[_i];
+                        if (ts.isObjectLiteralExpression(prop.initializer)) {
+                            _compilerOptionsObjectLiteralSyntax = prop.initializer;
+                            break;
+                        }
+                    }
+                }
+            }
+            return _compilerOptionsObjectLiteralSyntax;
+        }
+        function createOptionDiagnosticInObjectLiteralSyntax(objectLiteral, onKey, key1, key2, message, arg0, arg1) {
+            var props = ts.getPropertyAssignment(objectLiteral, key1, key2);
+            for (var _i = 0, props_2 = props; _i < props_2.length; _i++) {
+                var prop = props_2[_i];
+                programDiagnostics.add(ts.createDiagnosticForNodeInSourceFile(options.configFile, onKey ? prop.name : prop.initializer, message, arg0, arg1));
+            }
+            return !!props.length;
+        }
+        function blockEmittingOfFile(emitFileName, diag) {
             hasEmitBlockingDiagnostics.set(ts.toPath(emitFileName, currentDirectory, getCanonicalFileName), true);
-            programDiagnostics.add(ts.createCompilerDiagnostic(message, emitFileName));
+            programDiagnostics.add(diag);
         }
     }
     ts.createProgram = createProgram;
+    /* @internal */
+    /**
+     * Returns a DiagnosticMessage if we won't include a resolved module due to its extension.
+     * The DiagnosticMessage's parameters are the imported module name, and the filename it resolved to.
+     * This returns a diagnostic even if the module will be an untyped module.
+     */
+    function getResolutionDiagnostic(options, _a) {
+        var extension = _a.extension;
+        switch (extension) {
+            case ".ts" /* Ts */:
+            case ".d.ts" /* Dts */:
+                // These are always allowed.
+                return undefined;
+            case ".tsx" /* Tsx */:
+                return needJsx();
+            case ".jsx" /* Jsx */:
+                return needJsx() || needAllowJs();
+            case ".js" /* Js */:
+                return needAllowJs();
+        }
+        function needJsx() {
+            return options.jsx ? undefined : ts.Diagnostics.Module_0_was_resolved_to_1_but_jsx_is_not_set;
+        }
+        function needAllowJs() {
+            return options.allowJs ? undefined : ts.Diagnostics.Module_0_was_resolved_to_1_but_allowJs_is_not_set;
+        }
+    }
+    ts.getResolutionDiagnostic = getResolutionDiagnostic;
 })(ts || (ts = {}));
 /// <reference path="program.ts"/>
 /// <reference path="commandLineParser.ts"/>
@@ -60335,13 +72739,13 @@ var ts;
         reportDiagnosticWorker(diagnostic, host || defaultFormatDiagnosticsHost);
     }
     function reportDiagnostics(diagnostics, host) {
-        for (var _i = 0, diagnostics_2 = diagnostics; _i < diagnostics_2.length; _i++) {
-            var diagnostic = diagnostics_2[_i];
+        for (var _i = 0, diagnostics_3 = diagnostics; _i < diagnostics_3.length; _i++) {
+            var diagnostic = diagnostics_3[_i];
             reportDiagnostic(diagnostic, host);
         }
     }
-    function reportEmittedFiles(files, host) {
-        if (!files || files.length == 0) {
+    function reportEmittedFiles(files) {
+        if (!files || files.length === 0) {
             return;
         }
         var currentDir = ts.sys.getCurrentDirectory();
@@ -60351,54 +72755,6 @@ var ts;
             ts.sys.write("TSFILE: " + filepath + ts.sys.newLine);
         }
     }
-    /**
-     * Checks to see if the locale is in the appropriate format,
-     * and if it is, attempts to set the appropriate language.
-     */
-    function validateLocaleAndSetLanguage(locale, errors) {
-        var matchResult = /^([a-z]+)([_\-]([a-z]+))?$/.exec(locale.toLowerCase());
-        if (!matchResult) {
-            errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Locale_must_be_of_the_form_language_or_language_territory_For_example_0_or_1, "en", "ja-jp"));
-            return false;
-        }
-        var language = matchResult[1];
-        var territory = matchResult[3];
-        // First try the entire locale, then fall back to just language if that's all we have.
-        // Either ways do not fail, and fallback to the English diagnostic strings.
-        if (!trySetLanguageAndTerritory(language, territory, errors)) {
-            trySetLanguageAndTerritory(language, undefined, errors);
-        }
-        return true;
-    }
-    function trySetLanguageAndTerritory(language, territory, errors) {
-        var compilerFilePath = ts.normalizePath(ts.sys.getExecutingFilePath());
-        var containingDirectoryPath = ts.getDirectoryPath(compilerFilePath);
-        var filePath = ts.combinePaths(containingDirectoryPath, language);
-        if (territory) {
-            filePath = filePath + "-" + territory;
-        }
-        filePath = ts.sys.resolvePath(ts.combinePaths(filePath, "diagnosticMessages.generated.json"));
-        if (!ts.sys.fileExists(filePath)) {
-            return false;
-        }
-        // TODO: Add codePage support for readFile?
-        var fileContents = "";
-        try {
-            fileContents = ts.sys.readFile(filePath);
-        }
-        catch (e) {
-            errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unable_to_open_file_0, filePath));
-            return false;
-        }
-        try {
-            ts.localizedDiagnosticMessages = JSON.parse(fileContents);
-        }
-        catch (e) {
-            errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Corrupted_locale_file_0, filePath));
-            return false;
-        }
-        return true;
-    }
     function countLines(program) {
         var count = 0;
         ts.forEach(program.getSourceFiles(), function (file) {
@@ -60406,10 +72762,10 @@ var ts;
         });
         return count;
     }
-    function getDiagnosticText(message) {
-        var args = [];
+    function getDiagnosticText(_message) {
+        var _args = [];
         for (var _i = 1; _i < arguments.length; _i++) {
-            args[_i - 1] = arguments[_i];
+            _args[_i - 1] = arguments[_i];
         }
         var diagnostic = ts.createCompilerDiagnostic.apply(undefined, arguments);
         return diagnostic.messageText;
@@ -60417,78 +72773,8 @@ var ts;
     function reportDiagnosticSimply(diagnostic, host) {
         ts.sys.write(ts.formatDiagnostics([diagnostic], host));
     }
-    var redForegroundEscapeSequence = "\u001b[91m";
-    var yellowForegroundEscapeSequence = "\u001b[93m";
-    var blueForegroundEscapeSequence = "\u001b[93m";
-    var gutterStyleSequence = "\u001b[100;30m";
-    var gutterSeparator = " ";
-    var resetEscapeSequence = "\u001b[0m";
-    var ellipsis = "...";
-    var categoryFormatMap = ts.createMap((_a = {},
-        _a[ts.DiagnosticCategory.Warning] = yellowForegroundEscapeSequence,
-        _a[ts.DiagnosticCategory.Error] = redForegroundEscapeSequence,
-        _a[ts.DiagnosticCategory.Message] = blueForegroundEscapeSequence,
-        _a));
-    function formatAndReset(text, formatStyle) {
-        return formatStyle + text + resetEscapeSequence;
-    }
     function reportDiagnosticWithColorAndContext(diagnostic, host) {
-        var output = "";
-        if (diagnostic.file) {
-            var start = diagnostic.start, length_4 = diagnostic.length, file = diagnostic.file;
-            var _a = ts.getLineAndCharacterOfPosition(file, start), firstLine = _a.line, firstLineChar = _a.character;
-            var _b = ts.getLineAndCharacterOfPosition(file, start + length_4), lastLine = _b.line, lastLineChar = _b.character;
-            var lastLineInFile = ts.getLineAndCharacterOfPosition(file, file.text.length).line;
-            var relativeFileName = host ? ts.convertToRelativePath(file.fileName, host.getCurrentDirectory(), function (fileName) { return host.getCanonicalFileName(fileName); }) : file.fileName;
-            var hasMoreThanFiveLines = (lastLine - firstLine) >= 4;
-            var gutterWidth = (lastLine + 1 + "").length;
-            if (hasMoreThanFiveLines) {
-                gutterWidth = Math.max(ellipsis.length, gutterWidth);
-            }
-            output += ts.sys.newLine;
-            for (var i = firstLine; i <= lastLine; i++) {
-                // If the error spans over 5 lines, we'll only show the first 2 and last 2 lines,
-                // so we'll skip ahead to the second-to-last line.
-                if (hasMoreThanFiveLines && firstLine + 1 < i && i < lastLine - 1) {
-                    output += formatAndReset(padLeft(ellipsis, gutterWidth), gutterStyleSequence) + gutterSeparator + ts.sys.newLine;
-                    i = lastLine - 1;
-                }
-                var lineStart = ts.getPositionOfLineAndCharacter(file, i, 0);
-                var lineEnd = i < lastLineInFile ? ts.getPositionOfLineAndCharacter(file, i + 1, 0) : file.text.length;
-                var lineContent = file.text.slice(lineStart, lineEnd);
-                lineContent = lineContent.replace(/\s+$/g, ""); // trim from end
-                lineContent = lineContent.replace("\t", " "); // convert tabs to single spaces
-                // Output the gutter and the actual contents of the line.
-                output += formatAndReset(padLeft(i + 1 + "", gutterWidth), gutterStyleSequence) + gutterSeparator;
-                output += lineContent + ts.sys.newLine;
-                // Output the gutter and the error span for the line using tildes.
-                output += formatAndReset(padLeft("", gutterWidth), gutterStyleSequence) + gutterSeparator;
-                output += redForegroundEscapeSequence;
-                if (i === firstLine) {
-                    // If we're on the last line, then limit it to the last character of the last line.
-                    // Otherwise, we'll just squiggle the rest of the line, giving 'slice' no end position.
-                    var lastCharForLine = i === lastLine ? lastLineChar : undefined;
-                    output += lineContent.slice(0, firstLineChar).replace(/\S/g, " ");
-                    output += lineContent.slice(firstLineChar, lastCharForLine).replace(/./g, "~");
-                }
-                else if (i === lastLine) {
-                    output += lineContent.slice(0, lastLineChar).replace(/./g, "~");
-                }
-                else {
-                    // Squiggle the entire line.
-                    output += lineContent.replace(/./g, "~");
-                }
-                output += resetEscapeSequence;
-                output += ts.sys.newLine;
-            }
-            output += ts.sys.newLine;
-            output += relativeFileName + "(" + (firstLine + 1) + "," + (firstLineChar + 1) + "): ";
-        }
-        var categoryColor = categoryFormatMap[diagnostic.category];
-        var category = ts.DiagnosticCategory[diagnostic.category].toLowerCase();
-        output += formatAndReset(category, categoryColor) + " TS" + diagnostic.code + ": " + ts.flattenDiagnosticMessageText(diagnostic.messageText, ts.sys.newLine);
-        output += ts.sys.newLine + ts.sys.newLine;
-        ts.sys.write(output);
+        ts.sys.write(ts.formatDiagnosticsWithColorAndContext([diagnostic], host) + ts.sys.newLine + ts.sys.newLine);
     }
     function reportWatchDiagnostic(diagnostic) {
         var output = new Date().toLocaleTimeString() + " - ";
@@ -60496,7 +72782,7 @@ var ts;
             var loc = ts.getLineAndCharacterOfPosition(diagnostic.file, diagnostic.start);
             output += diagnostic.file.fileName + "(" + (loc.line + 1) + "," + (loc.character + 1) + "): ";
         }
-        output += "" + ts.flattenDiagnosticMessageText(diagnostic.messageText, ts.sys.newLine) + ts.sys.newLine;
+        output += "" + ts.flattenDiagnosticMessageText(diagnostic.messageText, ts.sys.newLine) + (ts.sys.newLine + ts.sys.newLine + ts.sys.newLine);
         ts.sys.write(output);
     }
     function padLeft(s, length) {
@@ -60536,7 +72822,7 @@ var ts;
                 reportDiagnostic(ts.createCompilerDiagnostic(ts.Diagnostics.The_current_host_does_not_support_the_0_option, "--locale"), /* host */ undefined);
                 return ts.sys.exit(ts.ExitStatus.DiagnosticsPresent_OutputsSkipped);
             }
-            validateLocaleAndSetLanguage(commandLine.options.locale, commandLine.errors);
+            ts.validateLocaleAndSetLanguage(commandLine.options.locale, ts.sys, commandLine.errors);
         }
         // If there are any errors due to command line parsing and/or
         // setting up localization, report them and quit.
@@ -60552,9 +72838,9 @@ var ts;
             printVersion();
             return ts.sys.exit(ts.ExitStatus.Success);
         }
-        if (commandLine.options.help) {
+        if (commandLine.options.help || commandLine.options.all) {
             printVersion();
-            printHelp();
+            printHelp(commandLine.options.all);
             return ts.sys.exit(ts.ExitStatus.Success);
         }
         if (commandLine.options.project) {
@@ -60588,7 +72874,7 @@ var ts;
         }
         if (commandLine.fileNames.length === 0 && !configFileName) {
             printVersion();
-            printHelp();
+            printHelp(commandLine.options.all);
             return ts.sys.exit(ts.ExitStatus.Success);
         }
         if (ts.isWatchSet(commandLine.options)) {
@@ -60605,7 +72891,7 @@ var ts;
                 // When the configFileName is just "tsconfig.json", the watched directory should be
                 // the current directory; if there is a given "project" parameter, then the configFileName
                 // is an absolute file name.
-                directory == "" ? "." : directory, watchedDirectoryChanged, /*recursive*/ true);
+                directory === "" ? "." : directory, watchedDirectoryChanged, /*recursive*/ true);
             }
         }
         performCompilation();
@@ -60627,20 +72913,11 @@ var ts;
                 ts.sys.exit(ts.ExitStatus.DiagnosticsPresent_OutputsSkipped);
                 return;
             }
-            var result = ts.parseConfigFileTextToJson(configFileName, cachedConfigFileText);
-            var configObject = result.config;
-            if (!configObject) {
-                reportDiagnostics([result.error], /* compilerHost */ undefined);
-                ts.sys.exit(ts.ExitStatus.DiagnosticsPresent_OutputsSkipped);
-                return;
-            }
+            var result = ts.parseJsonText(configFileName, cachedConfigFileText);
+            reportDiagnostics(result.parseDiagnostics, /* compilerHost */ undefined);
             var cwd = ts.sys.getCurrentDirectory();
-            var configParseResult = ts.parseJsonConfigFileContent(configObject, ts.sys, ts.getNormalizedAbsolutePath(ts.getDirectoryPath(configFileName), cwd), commandLine.options, ts.getNormalizedAbsolutePath(configFileName, cwd));
-            if (configParseResult.errors.length > 0) {
-                reportDiagnostics(configParseResult.errors, /* compilerHost */ undefined);
-                ts.sys.exit(ts.ExitStatus.DiagnosticsPresent_OutputsSkipped);
-                return;
-            }
+            var configParseResult = ts.parseJsonSourceFileConfigFileContent(result, ts.sys, ts.getNormalizedAbsolutePath(ts.getDirectoryPath(configFileName), cwd), commandLine.options, ts.getNormalizedAbsolutePath(configFileName, cwd));
+            reportDiagnostics(configParseResult.errors, /* compilerHost */ undefined);
             if (ts.isWatchSet(configParseResult.options)) {
                 if (!ts.sys.watchFile) {
                     reportDiagnostic(ts.createCompilerDiagnostic(ts.Diagnostics.The_current_host_does_not_support_the_0_option, "--watch"), /* host */ undefined);
@@ -60652,9 +72929,8 @@ var ts;
                     // When the configFileName is just "tsconfig.json", the watched directory should be
                     // the current directory; if there is a given "project" parameter, then the configFileName
                     // is an absolute file name.
-                    directory == "" ? "." : directory, watchedDirectoryChanged, /*recursive*/ true);
+                    directory === "" ? "." : directory, watchedDirectoryChanged, /*recursive*/ true);
                 }
-                ;
             }
             return configParseResult;
         }
@@ -60689,9 +72965,11 @@ var ts;
             reportWatchDiagnostic(ts.createCompilerDiagnostic(ts.Diagnostics.Compilation_complete_Watching_for_file_changes));
         }
         function cachedFileExists(fileName) {
-            return fileName in cachedExistingFiles
-                ? cachedExistingFiles[fileName]
-                : cachedExistingFiles[fileName] = hostFileExists(fileName);
+            var fileExists = cachedExistingFiles.get(fileName);
+            if (fileExists === undefined) {
+                cachedExistingFiles.set(fileName, fileExists = hostFileExists(fileName));
+            }
+            return fileExists;
         }
         function getSourceFile(fileName, languageVersion, onError) {
             // Return existing SourceFile object if one is available
@@ -60706,7 +72984,7 @@ var ts;
             var sourceFile = hostGetSourceFile(fileName, languageVersion, onError);
             if (sourceFile && ts.isWatchSet(compilerOptions) && ts.sys.watchFile) {
                 // Attach a file watcher
-                sourceFile.fileWatcher = ts.sys.watchFile(sourceFile.fileName, function (fileName, removed) { return sourceFileChanged(sourceFile, removed); });
+                sourceFile.fileWatcher = ts.sys.watchFile(sourceFile.fileName, function (_fileName, removed) { return sourceFileChanged(sourceFile, removed); });
             }
             return sourceFile;
         }
@@ -60747,10 +73025,13 @@ var ts;
             startTimerForHandlingDirectoryChanges();
         }
         function startTimerForHandlingDirectoryChanges() {
+            if (!ts.sys.setTimeout || !ts.sys.clearTimeout) {
+                return;
+            }
             if (timerHandleForDirectoryChanges) {
-                clearTimeout(timerHandleForDirectoryChanges);
+                ts.sys.clearTimeout(timerHandleForDirectoryChanges);
             }
-            timerHandleForDirectoryChanges = setTimeout(directoryChangeHandler, 250);
+            timerHandleForDirectoryChanges = ts.sys.setTimeout(directoryChangeHandler, 250);
         }
         function directoryChangeHandler() {
             var parsedCommandLine = parseConfigFile();
@@ -60766,10 +73047,13 @@ var ts;
         // operations (such as saving all modified files in an editor) a chance to complete before we kick
         // off a new compilation.
         function startTimerForRecompilation() {
+            if (!ts.sys.setTimeout || !ts.sys.clearTimeout) {
+                return;
+            }
             if (timerHandleForRecompilation) {
-                clearTimeout(timerHandleForRecompilation);
+                ts.sys.clearTimeout(timerHandleForRecompilation);
             }
-            timerHandleForRecompilation = setTimeout(recompile, 250);
+            timerHandleForRecompilation = ts.sys.setTimeout(recompile, 250);
         }
         function recompile() {
             timerHandleForRecompilation = undefined;
@@ -60843,7 +73127,7 @@ var ts;
             var emitOutput = program.emit();
             diagnostics = diagnostics.concat(emitOutput.diagnostics);
             reportDiagnostics(ts.sortAndDeduplicateDiagnostics(diagnostics), compilerHost);
-            reportEmittedFiles(emitOutput.emittedFiles, compilerHost);
+            reportEmittedFiles(emitOutput.emittedFiles);
             if (emitOutput.emitSkipped && diagnostics.length > 0) {
                 // If the emitter didn't emit anything, then pass that value along.
                 return ts.ExitStatus.DiagnosticsPresent_OutputsSkipped;
@@ -60859,17 +73143,17 @@ var ts;
             var nameSize = 0;
             var valueSize = 0;
             for (var _i = 0, statistics_1 = statistics; _i < statistics_1.length; _i++) {
-                var _a = statistics_1[_i], name_47 = _a.name, value = _a.value;
-                if (name_47.length > nameSize) {
-                    nameSize = name_47.length;
+                var _a = statistics_1[_i], name_58 = _a.name, value = _a.value;
+                if (name_58.length > nameSize) {
+                    nameSize = name_58.length;
                 }
                 if (value.length > valueSize) {
                     valueSize = value.length;
                 }
             }
             for (var _b = 0, statistics_2 = statistics; _b < statistics_2.length; _b++) {
-                var _c = statistics_2[_b], name_48 = _c.name, value = _c.value;
-                ts.sys.write(padRight(name_48 + ":", nameSize + 2) + padLeft(value.toString(), valueSize) + ts.sys.newLine);
+                var _c = statistics_2[_b], name_59 = _c.name, value = _c.value;
+                ts.sys.write(padRight(name_59 + ":", nameSize + 2) + padLeft(value.toString(), valueSize) + ts.sys.newLine);
             }
         }
         function reportStatisticalValue(name, value) {
@@ -60885,7 +73169,7 @@ var ts;
     function printVersion() {
         ts.sys.write(getDiagnosticText(ts.Diagnostics.Version_0, ts.version) + ts.sys.newLine);
     }
-    function printHelp() {
+    function printHelp(showAllOptions) {
         var output = [];
         // We want to align our "syntax" and "examples" commands to a certain margin.
         var syntaxLength = getDiagnosticText(ts.Diagnostics.Syntax_Colon_0, "").length;
@@ -60904,8 +73188,9 @@ var ts;
         output.push(ts.sys.newLine);
         output.push(getDiagnosticText(ts.Diagnostics.Options_Colon) + ts.sys.newLine);
         // Sort our options by their names, (e.g. "--noImplicitAny" comes before "--watch")
-        var optsList = ts.filter(ts.optionDeclarations.slice(), function (v) { return !v.experimental; });
-        optsList.sort(function (a, b) { return ts.compareValues(a.name.toLowerCase(), b.name.toLowerCase()); });
+        var optsList = showAllOptions ?
+            ts.optionDeclarations.slice().sort(function (a, b) { return ts.compareValues(a.name.toLowerCase(), b.name.toLowerCase()); }) :
+            ts.filter(ts.optionDeclarations.slice(), function (v) { return v.showInSimplifiedHelpView; });
         // We want our descriptions to align at the same column in our output,
         // so we keep track of the longest option usage string.
         marginLength = 0;
@@ -60931,13 +73216,9 @@ var ts;
             var description = void 0;
             if (option.name === "lib") {
                 description = getDiagnosticText(option.description);
-                var options = [];
                 var element = option.element;
                 var typeMap = element.type;
-                for (var key in typeMap) {
-                    options.push("'" + key + "'");
-                }
-                optionsDescriptionMap[description] = options;
+                optionsDescriptionMap.set(description, ts.arrayFrom(typeMap.keys()).map(function (key) { return "'" + key + "'"; }));
             }
             else {
                 description = getDiagnosticText(option.description);
@@ -60955,7 +73236,7 @@ var ts;
         for (var i = 0; i < usageColumn.length; i++) {
             var usage = usageColumn[i];
             var description = descriptionColumn[i];
-            var kindsList = optionsDescriptionMap[description];
+            var kindsList = optionsDescriptionMap.get(description);
             output.push(usage + makePadding(marginLength - usage.length + 2) + description + ts.sys.newLine);
             if (kindsList) {
                 output.push(makePadding(marginLength + 4));
@@ -60988,13 +73269,15 @@ var ts;
             reportDiagnostic(ts.createCompilerDiagnostic(ts.Diagnostics.A_tsconfig_json_file_is_already_defined_at_Colon_0, file), /* host */ undefined);
         }
         else {
-            ts.sys.writeFile(file, JSON.stringify(ts.generateTSConfig(options, fileNames), undefined, 4));
+            ts.sys.writeFile(file, ts.generateTSConfig(options, fileNames, ts.sys.newLine));
             reportDiagnostic(ts.createCompilerDiagnostic(ts.Diagnostics.Successfully_created_a_tsconfig_json_file), /* host */ undefined);
         }
         return;
     }
-    var _a;
 })(ts || (ts = {}));
+if (ts.Debug.isDebugging) {
+    ts.Debug.enableDebugInfo();
+}
 if (ts.sys.tryEnableSourceMapsForHost && /^development$/i.test(ts.sys.getEnvironmentVariable("NODE_ENV"))) {
     ts.sys.tryEnableSourceMapsForHost();
 }
@@ -61008,12 +73291,14 @@ var ts;
                 this.text = text;
             }
             StringScriptSnapshot.prototype.getText = function (start, end) {
-                return this.text.substring(start, end);
+                return start === 0 && end === this.text.length
+                    ? this.text
+                    : this.text.substring(start, end);
             };
             StringScriptSnapshot.prototype.getLength = function () {
                 return this.text.length;
             };
-            StringScriptSnapshot.prototype.getChangeRange = function (oldSnapshot) {
+            StringScriptSnapshot.prototype.getChangeRange = function () {
                 // Text-based snapshots do not support incremental parsing. Return undefined
                 // to signal that to the caller.
                 return undefined;
@@ -61033,17 +73318,18 @@ var ts;
     ts.TextChange = TextChange;
     var HighlightSpanKind;
     (function (HighlightSpanKind) {
-        HighlightSpanKind.none = "none";
-        HighlightSpanKind.definition = "definition";
-        HighlightSpanKind.reference = "reference";
-        HighlightSpanKind.writtenReference = "writtenReference";
+        HighlightSpanKind["none"] = "none";
+        HighlightSpanKind["definition"] = "definition";
+        HighlightSpanKind["reference"] = "reference";
+        HighlightSpanKind["writtenReference"] = "writtenReference";
     })(HighlightSpanKind = ts.HighlightSpanKind || (ts.HighlightSpanKind = {}));
+    var IndentStyle;
     (function (IndentStyle) {
         IndentStyle[IndentStyle["None"] = 0] = "None";
         IndentStyle[IndentStyle["Block"] = 1] = "Block";
         IndentStyle[IndentStyle["Smart"] = 2] = "Smart";
-    })(ts.IndentStyle || (ts.IndentStyle = {}));
-    var IndentStyle = ts.IndentStyle;
+    })(IndentStyle = ts.IndentStyle || (ts.IndentStyle = {}));
+    var SymbolDisplayPartKind;
     (function (SymbolDisplayPartKind) {
         SymbolDisplayPartKind[SymbolDisplayPartKind["aliasName"] = 0] = "aliasName";
         SymbolDisplayPartKind[SymbolDisplayPartKind["className"] = 1] = "className";
@@ -61067,14 +73353,14 @@ var ts;
         SymbolDisplayPartKind[SymbolDisplayPartKind["enumMemberName"] = 19] = "enumMemberName";
         SymbolDisplayPartKind[SymbolDisplayPartKind["functionName"] = 20] = "functionName";
         SymbolDisplayPartKind[SymbolDisplayPartKind["regularExpressionLiteral"] = 21] = "regularExpressionLiteral";
-    })(ts.SymbolDisplayPartKind || (ts.SymbolDisplayPartKind = {}));
-    var SymbolDisplayPartKind = ts.SymbolDisplayPartKind;
+    })(SymbolDisplayPartKind = ts.SymbolDisplayPartKind || (ts.SymbolDisplayPartKind = {}));
+    var OutputFileType;
     (function (OutputFileType) {
         OutputFileType[OutputFileType["JavaScript"] = 0] = "JavaScript";
         OutputFileType[OutputFileType["SourceMap"] = 1] = "SourceMap";
         OutputFileType[OutputFileType["Declaration"] = 2] = "Declaration";
-    })(ts.OutputFileType || (ts.OutputFileType = {}));
-    var OutputFileType = ts.OutputFileType;
+    })(OutputFileType = ts.OutputFileType || (ts.OutputFileType = {}));
+    var EndOfLineState;
     (function (EndOfLineState) {
         EndOfLineState[EndOfLineState["None"] = 0] = "None";
         EndOfLineState[EndOfLineState["InMultiLineCommentTrivia"] = 1] = "InMultiLineCommentTrivia";
@@ -61083,8 +73369,8 @@ var ts;
         EndOfLineState[EndOfLineState["InTemplateHeadOrNoSubstitutionTemplate"] = 4] = "InTemplateHeadOrNoSubstitutionTemplate";
         EndOfLineState[EndOfLineState["InTemplateMiddleOrTail"] = 5] = "InTemplateMiddleOrTail";
         EndOfLineState[EndOfLineState["InTemplateSubstitutionPosition"] = 6] = "InTemplateSubstitutionPosition";
-    })(ts.EndOfLineState || (ts.EndOfLineState = {}));
-    var EndOfLineState = ts.EndOfLineState;
+    })(EndOfLineState = ts.EndOfLineState || (ts.EndOfLineState = {}));
+    var TokenClass;
     (function (TokenClass) {
         TokenClass[TokenClass["Punctuation"] = 0] = "Punctuation";
         TokenClass[TokenClass["Keyword"] = 1] = "Keyword";
@@ -61095,114 +73381,113 @@ var ts;
         TokenClass[TokenClass["NumberLiteral"] = 6] = "NumberLiteral";
         TokenClass[TokenClass["StringLiteral"] = 7] = "StringLiteral";
         TokenClass[TokenClass["RegExpLiteral"] = 8] = "RegExpLiteral";
-    })(ts.TokenClass || (ts.TokenClass = {}));
-    var TokenClass = ts.TokenClass;
-    // TODO: move these to enums
+    })(TokenClass = ts.TokenClass || (ts.TokenClass = {}));
     var ScriptElementKind;
     (function (ScriptElementKind) {
-        ScriptElementKind.unknown = "";
-        ScriptElementKind.warning = "warning";
+        ScriptElementKind["unknown"] = "";
+        ScriptElementKind["warning"] = "warning";
         /** predefined type (void) or keyword (class) */
-        ScriptElementKind.keyword = "keyword";
+        ScriptElementKind["keyword"] = "keyword";
         /** top level script node */
-        ScriptElementKind.scriptElement = "script";
+        ScriptElementKind["scriptElement"] = "script";
         /** module foo {} */
-        ScriptElementKind.moduleElement = "module";
+        ScriptElementKind["moduleElement"] = "module";
         /** class X {} */
-        ScriptElementKind.classElement = "class";
+        ScriptElementKind["classElement"] = "class";
         /** var x = class X {} */
-        ScriptElementKind.localClassElement = "local class";
+        ScriptElementKind["localClassElement"] = "local class";
         /** interface Y {} */
-        ScriptElementKind.interfaceElement = "interface";
+        ScriptElementKind["interfaceElement"] = "interface";
         /** type T = ... */
-        ScriptElementKind.typeElement = "type";
+        ScriptElementKind["typeElement"] = "type";
         /** enum E */
-        ScriptElementKind.enumElement = "enum";
-        // TODO: GH#9983
-        ScriptElementKind.enumMemberElement = "const";
+        ScriptElementKind["enumElement"] = "enum";
+        ScriptElementKind["enumMemberElement"] = "enum member";
         /**
          * Inside module and script only
          * const v = ..
          */
-        ScriptElementKind.variableElement = "var";
+        ScriptElementKind["variableElement"] = "var";
         /** Inside function */
-        ScriptElementKind.localVariableElement = "local var";
+        ScriptElementKind["localVariableElement"] = "local var";
         /**
          * Inside module and script only
          * function f() { }
          */
-        ScriptElementKind.functionElement = "function";
+        ScriptElementKind["functionElement"] = "function";
         /** Inside function */
-        ScriptElementKind.localFunctionElement = "local function";
+        ScriptElementKind["localFunctionElement"] = "local function";
         /** class X { [public|private]* foo() {} } */
-        ScriptElementKind.memberFunctionElement = "method";
+        ScriptElementKind["memberFunctionElement"] = "method";
         /** class X { [public|private]* [get|set] foo:number; } */
-        ScriptElementKind.memberGetAccessorElement = "getter";
-        ScriptElementKind.memberSetAccessorElement = "setter";
+        ScriptElementKind["memberGetAccessorElement"] = "getter";
+        ScriptElementKind["memberSetAccessorElement"] = "setter";
         /**
          * class X { [public|private]* foo:number; }
          * interface Y { foo:number; }
          */
-        ScriptElementKind.memberVariableElement = "property";
+        ScriptElementKind["memberVariableElement"] = "property";
         /** class X { constructor() { } } */
-        ScriptElementKind.constructorImplementationElement = "constructor";
+        ScriptElementKind["constructorImplementationElement"] = "constructor";
         /** interface Y { ():number; } */
-        ScriptElementKind.callSignatureElement = "call";
+        ScriptElementKind["callSignatureElement"] = "call";
         /** interface Y { []:number; } */
-        ScriptElementKind.indexSignatureElement = "index";
+        ScriptElementKind["indexSignatureElement"] = "index";
         /** interface Y { new():Y; } */
-        ScriptElementKind.constructSignatureElement = "construct";
+        ScriptElementKind["constructSignatureElement"] = "construct";
         /** function foo(*Y*: string) */
-        ScriptElementKind.parameterElement = "parameter";
-        ScriptElementKind.typeParameterElement = "type parameter";
-        ScriptElementKind.primitiveType = "primitive type";
-        ScriptElementKind.label = "label";
-        ScriptElementKind.alias = "alias";
-        ScriptElementKind.constElement = "const";
-        ScriptElementKind.letElement = "let";
-        ScriptElementKind.directory = "directory";
-        ScriptElementKind.externalModuleName = "external module name";
+        ScriptElementKind["parameterElement"] = "parameter";
+        ScriptElementKind["typeParameterElement"] = "type parameter";
+        ScriptElementKind["primitiveType"] = "primitive type";
+        ScriptElementKind["label"] = "label";
+        ScriptElementKind["alias"] = "alias";
+        ScriptElementKind["constElement"] = "const";
+        ScriptElementKind["letElement"] = "let";
+        ScriptElementKind["directory"] = "directory";
+        ScriptElementKind["externalModuleName"] = "external module name";
+        /**
+         * <JsxTagName attribute1 attribute2={0} />
+         */
+        ScriptElementKind["jsxAttribute"] = "JSX attribute";
     })(ScriptElementKind = ts.ScriptElementKind || (ts.ScriptElementKind = {}));
     var ScriptElementKindModifier;
     (function (ScriptElementKindModifier) {
-        ScriptElementKindModifier.none = "";
-        ScriptElementKindModifier.publicMemberModifier = "public";
-        ScriptElementKindModifier.privateMemberModifier = "private";
-        ScriptElementKindModifier.protectedMemberModifier = "protected";
-        ScriptElementKindModifier.exportedModifier = "export";
-        ScriptElementKindModifier.ambientModifier = "declare";
-        ScriptElementKindModifier.staticModifier = "static";
-        ScriptElementKindModifier.abstractModifier = "abstract";
+        ScriptElementKindModifier["none"] = "";
+        ScriptElementKindModifier["publicMemberModifier"] = "public";
+        ScriptElementKindModifier["privateMemberModifier"] = "private";
+        ScriptElementKindModifier["protectedMemberModifier"] = "protected";
+        ScriptElementKindModifier["exportedModifier"] = "export";
+        ScriptElementKindModifier["ambientModifier"] = "declare";
+        ScriptElementKindModifier["staticModifier"] = "static";
+        ScriptElementKindModifier["abstractModifier"] = "abstract";
     })(ScriptElementKindModifier = ts.ScriptElementKindModifier || (ts.ScriptElementKindModifier = {}));
-    var ClassificationTypeNames = (function () {
-        function ClassificationTypeNames() {
-        }
-        return ClassificationTypeNames;
-    }());
-    ClassificationTypeNames.comment = "comment";
-    ClassificationTypeNames.identifier = "identifier";
-    ClassificationTypeNames.keyword = "keyword";
-    ClassificationTypeNames.numericLiteral = "number";
-    ClassificationTypeNames.operator = "operator";
-    ClassificationTypeNames.stringLiteral = "string";
-    ClassificationTypeNames.whiteSpace = "whitespace";
-    ClassificationTypeNames.text = "text";
-    ClassificationTypeNames.punctuation = "punctuation";
-    ClassificationTypeNames.className = "class name";
-    ClassificationTypeNames.enumName = "enum name";
-    ClassificationTypeNames.interfaceName = "interface name";
-    ClassificationTypeNames.moduleName = "module name";
-    ClassificationTypeNames.typeParameterName = "type parameter name";
-    ClassificationTypeNames.typeAliasName = "type alias name";
-    ClassificationTypeNames.parameterName = "parameter name";
-    ClassificationTypeNames.docCommentTagName = "doc comment tag name";
-    ClassificationTypeNames.jsxOpenTagName = "jsx open tag name";
-    ClassificationTypeNames.jsxCloseTagName = "jsx close tag name";
-    ClassificationTypeNames.jsxSelfClosingTagName = "jsx self closing tag name";
-    ClassificationTypeNames.jsxAttribute = "jsx attribute";
-    ClassificationTypeNames.jsxText = "jsx text";
-    ClassificationTypeNames.jsxAttributeStringLiteralValue = "jsx attribute string literal value";
-    ts.ClassificationTypeNames = ClassificationTypeNames;
+    var ClassificationTypeNames;
+    (function (ClassificationTypeNames) {
+        ClassificationTypeNames["comment"] = "comment";
+        ClassificationTypeNames["identifier"] = "identifier";
+        ClassificationTypeNames["keyword"] = "keyword";
+        ClassificationTypeNames["numericLiteral"] = "number";
+        ClassificationTypeNames["operator"] = "operator";
+        ClassificationTypeNames["stringLiteral"] = "string";
+        ClassificationTypeNames["whiteSpace"] = "whitespace";
+        ClassificationTypeNames["text"] = "text";
+        ClassificationTypeNames["punctuation"] = "punctuation";
+        ClassificationTypeNames["className"] = "class name";
+        ClassificationTypeNames["enumName"] = "enum name";
+        ClassificationTypeNames["interfaceName"] = "interface name";
+        ClassificationTypeNames["moduleName"] = "module name";
+        ClassificationTypeNames["typeParameterName"] = "type parameter name";
+        ClassificationTypeNames["typeAliasName"] = "type alias name";
+        ClassificationTypeNames["parameterName"] = "parameter name";
+        ClassificationTypeNames["docCommentTagName"] = "doc comment tag name";
+        ClassificationTypeNames["jsxOpenTagName"] = "jsx open tag name";
+        ClassificationTypeNames["jsxCloseTagName"] = "jsx close tag name";
+        ClassificationTypeNames["jsxSelfClosingTagName"] = "jsx self closing tag name";
+        ClassificationTypeNames["jsxAttribute"] = "jsx attribute";
+        ClassificationTypeNames["jsxText"] = "jsx text";
+        ClassificationTypeNames["jsxAttributeStringLiteralValue"] = "jsx attribute string literal value";
+    })(ClassificationTypeNames = ts.ClassificationTypeNames || (ts.ClassificationTypeNames = {}));
+    var ClassificationType;
     (function (ClassificationType) {
         ClassificationType[ClassificationType["comment"] = 1] = "comment";
         ClassificationType[ClassificationType["identifier"] = 2] = "identifier";
@@ -61228,52 +73513,54 @@ var ts;
         ClassificationType[ClassificationType["jsxAttribute"] = 22] = "jsxAttribute";
         ClassificationType[ClassificationType["jsxText"] = 23] = "jsxText";
         ClassificationType[ClassificationType["jsxAttributeStringLiteralValue"] = 24] = "jsxAttributeStringLiteralValue";
-    })(ts.ClassificationType || (ts.ClassificationType = {}));
-    var ClassificationType = ts.ClassificationType;
+    })(ClassificationType = ts.ClassificationType || (ts.ClassificationType = {}));
 })(ts || (ts = {}));
 // These utilities are common to multiple language service features.
 /* @internal */
 var ts;
 (function (ts) {
-    ts.scanner = ts.createScanner(2 /* Latest */, /*skipTrivia*/ true);
+    ts.scanner = ts.createScanner(5 /* Latest */, /*skipTrivia*/ true);
     ts.emptyArray = [];
+    var SemanticMeaning;
     (function (SemanticMeaning) {
         SemanticMeaning[SemanticMeaning["None"] = 0] = "None";
         SemanticMeaning[SemanticMeaning["Value"] = 1] = "Value";
         SemanticMeaning[SemanticMeaning["Type"] = 2] = "Type";
         SemanticMeaning[SemanticMeaning["Namespace"] = 4] = "Namespace";
         SemanticMeaning[SemanticMeaning["All"] = 7] = "All";
-    })(ts.SemanticMeaning || (ts.SemanticMeaning = {}));
-    var SemanticMeaning = ts.SemanticMeaning;
+    })(SemanticMeaning = ts.SemanticMeaning || (ts.SemanticMeaning = {}));
     function getMeaningFromDeclaration(node) {
         switch (node.kind) {
-            case 142 /* Parameter */:
-            case 218 /* VariableDeclaration */:
-            case 169 /* BindingElement */:
-            case 145 /* PropertyDeclaration */:
-            case 144 /* PropertySignature */:
-            case 253 /* PropertyAssignment */:
-            case 254 /* ShorthandPropertyAssignment */:
-            case 255 /* EnumMember */:
-            case 147 /* MethodDeclaration */:
-            case 146 /* MethodSignature */:
-            case 148 /* Constructor */:
-            case 149 /* GetAccessor */:
-            case 150 /* SetAccessor */:
-            case 220 /* FunctionDeclaration */:
-            case 179 /* FunctionExpression */:
-            case 180 /* ArrowFunction */:
-            case 252 /* CatchClause */:
+            case 146 /* Parameter */:
+            case 226 /* VariableDeclaration */:
+            case 176 /* BindingElement */:
+            case 149 /* PropertyDeclaration */:
+            case 148 /* PropertySignature */:
+            case 261 /* PropertyAssignment */:
+            case 262 /* ShorthandPropertyAssignment */:
+            case 151 /* MethodDeclaration */:
+            case 150 /* MethodSignature */:
+            case 152 /* Constructor */:
+            case 153 /* GetAccessor */:
+            case 154 /* SetAccessor */:
+            case 228 /* FunctionDeclaration */:
+            case 186 /* FunctionExpression */:
+            case 187 /* ArrowFunction */:
+            case 260 /* CatchClause */:
+            case 253 /* JsxAttribute */:
                 return 1 /* Value */;
-            case 141 /* TypeParameter */:
-            case 222 /* InterfaceDeclaration */:
-            case 223 /* TypeAliasDeclaration */:
-            case 159 /* TypeLiteral */:
+            case 145 /* TypeParameter */:
+            case 230 /* InterfaceDeclaration */:
+            case 231 /* TypeAliasDeclaration */:
+            case 163 /* TypeLiteral */:
                 return 2 /* Type */;
-            case 221 /* ClassDeclaration */:
-            case 224 /* EnumDeclaration */:
+            case 291 /* JSDocTypedefTag */:
+                // If it has no name node, it shares the name with the value declaration below it.
+                return node.name === undefined ? 1 /* Value */ | 2 /* Type */ : 2 /* Type */;
+            case 264 /* EnumMember */:
+            case 229 /* ClassDeclaration */:
                 return 1 /* Value */ | 2 /* Type */;
-            case 225 /* ModuleDeclaration */:
+            case 233 /* ModuleDeclaration */:
                 if (ts.isAmbientModule(node)) {
                     return 4 /* Namespace */ | 1 /* Value */;
                 }
@@ -61283,25 +73570,29 @@ var ts;
                 else {
                     return 4 /* Namespace */;
                 }
-            case 233 /* NamedImports */:
-            case 234 /* ImportSpecifier */:
-            case 229 /* ImportEqualsDeclaration */:
-            case 230 /* ImportDeclaration */:
-            case 235 /* ExportAssignment */:
-            case 236 /* ExportDeclaration */:
-                return 1 /* Value */ | 2 /* Type */ | 4 /* Namespace */;
+            case 232 /* EnumDeclaration */:
+            case 241 /* NamedImports */:
+            case 242 /* ImportSpecifier */:
+            case 237 /* ImportEqualsDeclaration */:
+            case 238 /* ImportDeclaration */:
+            case 243 /* ExportAssignment */:
+            case 244 /* ExportDeclaration */:
+                return 7 /* All */;
             // An external module can be a Value
-            case 256 /* SourceFile */:
+            case 265 /* SourceFile */:
                 return 4 /* Namespace */ | 1 /* Value */;
         }
-        return 1 /* Value */ | 2 /* Type */ | 4 /* Namespace */;
+        return 7 /* All */;
     }
     ts.getMeaningFromDeclaration = getMeaningFromDeclaration;
     function getMeaningFromLocation(node) {
-        if (node.parent.kind === 235 /* ExportAssignment */) {
-            return 1 /* Value */ | 2 /* Type */ | 4 /* Namespace */;
+        if (node.kind === 265 /* SourceFile */) {
+            return 1 /* Value */;
+        }
+        else if (node.parent.kind === 243 /* ExportAssignment */) {
+            return 7 /* All */;
         }
-        else if (isInRightSideOfImport(node)) {
+        else if (isInRightSideOfInternalImportEqualsDeclaration(node)) {
             return getMeaningFromRightHandSideOfImportEquals(node);
         }
         else if (ts.isDeclarationName(node)) {
@@ -61313,56 +73604,61 @@ var ts;
         else if (isNamespaceReference(node)) {
             return 4 /* Namespace */;
         }
+        else if (ts.isTypeParameterDeclaration(node.parent)) {
+            ts.Debug.assert(ts.isJSDocTemplateTag(node.parent.parent)); // Else would be handled by isDeclarationName
+            return 2 /* Type */;
+        }
         else {
             return 1 /* Value */;
         }
     }
     ts.getMeaningFromLocation = getMeaningFromLocation;
     function getMeaningFromRightHandSideOfImportEquals(node) {
-        ts.Debug.assert(node.kind === 69 /* Identifier */);
+        ts.Debug.assert(node.kind === 71 /* Identifier */);
         //     import a = |b|; // Namespace
         //     import a = |b.c|; // Value, type, namespace
         //     import a = |b.c|.d; // Namespace
-        if (node.parent.kind === 139 /* QualifiedName */ &&
+        if (node.parent.kind === 143 /* QualifiedName */ &&
             node.parent.right === node &&
-            node.parent.parent.kind === 229 /* ImportEqualsDeclaration */) {
+            node.parent.parent.kind === 237 /* ImportEqualsDeclaration */) {
             return 1 /* Value */ | 2 /* Type */ | 4 /* Namespace */;
         }
         return 4 /* Namespace */;
     }
-    function isInRightSideOfImport(node) {
-        while (node.parent.kind === 139 /* QualifiedName */) {
+    function isInRightSideOfInternalImportEqualsDeclaration(node) {
+        while (node.parent.kind === 143 /* QualifiedName */) {
             node = node.parent;
         }
         return ts.isInternalModuleImportEqualsDeclaration(node.parent) && node.parent.moduleReference === node;
     }
+    ts.isInRightSideOfInternalImportEqualsDeclaration = isInRightSideOfInternalImportEqualsDeclaration;
     function isNamespaceReference(node) {
         return isQualifiedNameNamespaceReference(node) || isPropertyAccessNamespaceReference(node);
     }
     function isQualifiedNameNamespaceReference(node) {
         var root = node;
         var isLastClause = true;
-        if (root.parent.kind === 139 /* QualifiedName */) {
-            while (root.parent && root.parent.kind === 139 /* QualifiedName */) {
+        if (root.parent.kind === 143 /* QualifiedName */) {
+            while (root.parent && root.parent.kind === 143 /* QualifiedName */) {
                 root = root.parent;
             }
             isLastClause = root.right === node;
         }
-        return root.parent.kind === 155 /* TypeReference */ && !isLastClause;
+        return root.parent.kind === 159 /* TypeReference */ && !isLastClause;
     }
     function isPropertyAccessNamespaceReference(node) {
         var root = node;
         var isLastClause = true;
-        if (root.parent.kind === 172 /* PropertyAccessExpression */) {
-            while (root.parent && root.parent.kind === 172 /* PropertyAccessExpression */) {
+        if (root.parent.kind === 179 /* PropertyAccessExpression */) {
+            while (root.parent && root.parent.kind === 179 /* PropertyAccessExpression */) {
                 root = root.parent;
             }
             isLastClause = root.name === node;
         }
-        if (!isLastClause && root.parent.kind === 194 /* ExpressionWithTypeArguments */ && root.parent.parent.kind === 251 /* HeritageClause */) {
+        if (!isLastClause && root.parent.kind === 201 /* ExpressionWithTypeArguments */ && root.parent.parent.kind === 259 /* HeritageClause */) {
             var decl = root.parent.parent.parent;
-            return (decl.kind === 221 /* ClassDeclaration */ && root.parent.parent.token === 106 /* ImplementsKeyword */) ||
-                (decl.kind === 222 /* InterfaceDeclaration */ && root.parent.parent.token === 83 /* ExtendsKeyword */);
+            return (decl.kind === 229 /* ClassDeclaration */ && root.parent.parent.token === 108 /* ImplementsKeyword */) ||
+                (decl.kind === 230 /* InterfaceDeclaration */ && root.parent.parent.token === 85 /* ExtendsKeyword */);
         }
         return false;
     }
@@ -61370,17 +73666,27 @@ var ts;
         if (ts.isRightSideOfQualifiedNameOrPropertyAccess(node)) {
             node = node.parent;
         }
-        return node.parent.kind === 155 /* TypeReference */ ||
-            (node.parent.kind === 194 /* ExpressionWithTypeArguments */ && !ts.isExpressionWithTypeArgumentsInClassExtendsClause(node.parent)) ||
-            (node.kind === 97 /* ThisKeyword */ && !ts.isPartOfExpression(node)) ||
-            node.kind === 165 /* ThisType */;
+        switch (node.kind) {
+            case 99 /* ThisKeyword */:
+                return !ts.isPartOfExpression(node);
+            case 169 /* ThisType */:
+                return true;
+        }
+        switch (node.parent.kind) {
+            case 159 /* TypeReference */:
+            case 277 /* JSDocTypeReference */:
+                return true;
+            case 201 /* ExpressionWithTypeArguments */:
+                return !ts.isExpressionWithTypeArgumentsInClassExtendsClause(node.parent);
+        }
+        return false;
     }
     function isCallExpressionTarget(node) {
-        return isCallOrNewExpressionTarget(node, 174 /* CallExpression */);
+        return isCallOrNewExpressionTarget(node, 181 /* CallExpression */);
     }
     ts.isCallExpressionTarget = isCallExpressionTarget;
     function isNewExpressionTarget(node) {
-        return isCallOrNewExpressionTarget(node, 175 /* NewExpression */);
+        return isCallOrNewExpressionTarget(node, 182 /* NewExpression */);
     }
     ts.isNewExpressionTarget = isNewExpressionTarget;
     function isCallOrNewExpressionTarget(node, kind) {
@@ -61393,7 +73699,7 @@ var ts;
     ts.climbPastPropertyAccess = climbPastPropertyAccess;
     function getTargetLabel(referenceNode, labelName) {
         while (referenceNode) {
-            if (referenceNode.kind === 214 /* LabeledStatement */ && referenceNode.label.text === labelName) {
+            if (referenceNode.kind === 222 /* LabeledStatement */ && referenceNode.label.text === labelName) {
                 return referenceNode.label;
             }
             referenceNode = referenceNode.parent;
@@ -61402,14 +73708,14 @@ var ts;
     }
     ts.getTargetLabel = getTargetLabel;
     function isJumpStatementTarget(node) {
-        return node.kind === 69 /* Identifier */ &&
-            (node.parent.kind === 210 /* BreakStatement */ || node.parent.kind === 209 /* ContinueStatement */) &&
+        return node.kind === 71 /* Identifier */ &&
+            (node.parent.kind === 218 /* BreakStatement */ || node.parent.kind === 217 /* ContinueStatement */) &&
             node.parent.label === node;
     }
     ts.isJumpStatementTarget = isJumpStatementTarget;
     function isLabelOfLabeledStatement(node) {
-        return node.kind === 69 /* Identifier */ &&
-            node.parent.kind === 214 /* LabeledStatement */ &&
+        return node.kind === 71 /* Identifier */ &&
+            node.parent.kind === 222 /* LabeledStatement */ &&
             node.parent.label === node;
     }
     function isLabelName(node) {
@@ -61417,38 +73723,38 @@ var ts;
     }
     ts.isLabelName = isLabelName;
     function isRightSideOfQualifiedName(node) {
-        return node.parent.kind === 139 /* QualifiedName */ && node.parent.right === node;
+        return node.parent.kind === 143 /* QualifiedName */ && node.parent.right === node;
     }
     ts.isRightSideOfQualifiedName = isRightSideOfQualifiedName;
     function isRightSideOfPropertyAccess(node) {
-        return node && node.parent && node.parent.kind === 172 /* PropertyAccessExpression */ && node.parent.name === node;
+        return node && node.parent && node.parent.kind === 179 /* PropertyAccessExpression */ && node.parent.name === node;
     }
     ts.isRightSideOfPropertyAccess = isRightSideOfPropertyAccess;
     function isNameOfModuleDeclaration(node) {
-        return node.parent.kind === 225 /* ModuleDeclaration */ && node.parent.name === node;
+        return node.parent.kind === 233 /* ModuleDeclaration */ && node.parent.name === node;
     }
     ts.isNameOfModuleDeclaration = isNameOfModuleDeclaration;
     function isNameOfFunctionDeclaration(node) {
-        return node.kind === 69 /* Identifier */ &&
+        return node.kind === 71 /* Identifier */ &&
             ts.isFunctionLike(node.parent) && node.parent.name === node;
     }
     ts.isNameOfFunctionDeclaration = isNameOfFunctionDeclaration;
     function isLiteralNameOfPropertyDeclarationOrIndexAccess(node) {
         if (node.kind === 9 /* StringLiteral */ || node.kind === 8 /* NumericLiteral */) {
             switch (node.parent.kind) {
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
-                case 253 /* PropertyAssignment */:
-                case 255 /* EnumMember */:
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                case 225 /* ModuleDeclaration */:
-                    return node.parent.name === node;
-                case 173 /* ElementAccessExpression */:
+                case 149 /* PropertyDeclaration */:
+                case 148 /* PropertySignature */:
+                case 261 /* PropertyAssignment */:
+                case 264 /* EnumMember */:
+                case 151 /* MethodDeclaration */:
+                case 150 /* MethodSignature */:
+                case 153 /* GetAccessor */:
+                case 154 /* SetAccessor */:
+                case 233 /* ModuleDeclaration */:
+                    return ts.getNameOfDeclaration(node.parent) === node;
+                case 180 /* ElementAccessExpression */:
                     return node.parent.argumentExpression === node;
-                case 140 /* ComputedPropertyName */:
+                case 144 /* ComputedPropertyName */:
                     return true;
             }
         }
@@ -61460,36 +73766,6 @@ var ts;
             ts.getExternalModuleImportEqualsDeclarationExpression(node.parent.parent) === node;
     }
     ts.isExpressionOfExternalModuleImportEqualsDeclaration = isExpressionOfExternalModuleImportEqualsDeclaration;
-    /** Returns true if the position is within a comment */
-    function isInsideComment(sourceFile, token, position) {
-        // The position has to be: 1. in the leading trivia (before token.getStart()), and 2. within a comment
-        return position <= token.getStart(sourceFile) &&
-            (isInsideCommentRange(ts.getTrailingCommentRanges(sourceFile.text, token.getFullStart())) ||
-                isInsideCommentRange(ts.getLeadingCommentRanges(sourceFile.text, token.getFullStart())));
-        function isInsideCommentRange(comments) {
-            return ts.forEach(comments, function (comment) {
-                // either we are 1. completely inside the comment, or 2. at the end of the comment
-                if (comment.pos < position && position < comment.end) {
-                    return true;
-                }
-                else if (position === comment.end) {
-                    var text = sourceFile.text;
-                    var width = comment.end - comment.pos;
-                    // is single line comment or just /*
-                    if (width <= 2 || text.charCodeAt(comment.pos + 1) === 47 /* slash */) {
-                        return true;
-                    }
-                    else {
-                        // is unterminated multi-line comment
-                        return !(text.charCodeAt(comment.end - 1) === 47 /* slash */ &&
-                            text.charCodeAt(comment.end - 2) === 42 /* asterisk */);
-                    }
-                }
-                return false;
-            });
-        }
-    }
-    ts.isInsideComment = isInsideComment;
     function getContainerNode(node) {
         while (true) {
             node = node.parent;
@@ -61497,17 +73773,17 @@ var ts;
                 return undefined;
             }
             switch (node.kind) {
-                case 256 /* SourceFile */:
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                case 220 /* FunctionDeclaration */:
-                case 179 /* FunctionExpression */:
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                case 221 /* ClassDeclaration */:
-                case 222 /* InterfaceDeclaration */:
-                case 224 /* EnumDeclaration */:
-                case 225 /* ModuleDeclaration */:
+                case 265 /* SourceFile */:
+                case 151 /* MethodDeclaration */:
+                case 150 /* MethodSignature */:
+                case 228 /* FunctionDeclaration */:
+                case 186 /* FunctionExpression */:
+                case 153 /* GetAccessor */:
+                case 154 /* SetAccessor */:
+                case 229 /* ClassDeclaration */:
+                case 230 /* InterfaceDeclaration */:
+                case 232 /* EnumDeclaration */:
+                case 233 /* ModuleDeclaration */:
                     return node;
             }
         }
@@ -61515,76 +73791,67 @@ var ts;
     ts.getContainerNode = getContainerNode;
     function getNodeKind(node) {
         switch (node.kind) {
-            case 256 /* SourceFile */:
-                return ts.isExternalModule(node) ? ts.ScriptElementKind.moduleElement : ts.ScriptElementKind.scriptElement;
-            case 225 /* ModuleDeclaration */:
-                return ts.ScriptElementKind.moduleElement;
-            case 221 /* ClassDeclaration */:
-            case 192 /* ClassExpression */:
-                return ts.ScriptElementKind.classElement;
-            case 222 /* InterfaceDeclaration */: return ts.ScriptElementKind.interfaceElement;
-            case 223 /* TypeAliasDeclaration */: return ts.ScriptElementKind.typeElement;
-            case 224 /* EnumDeclaration */: return ts.ScriptElementKind.enumElement;
-            case 218 /* VariableDeclaration */:
+            case 265 /* SourceFile */:
+                return ts.isExternalModule(node) ? "module" /* moduleElement */ : "script" /* scriptElement */;
+            case 233 /* ModuleDeclaration */:
+                return "module" /* moduleElement */;
+            case 229 /* ClassDeclaration */:
+            case 199 /* ClassExpression */:
+                return "class" /* classElement */;
+            case 230 /* InterfaceDeclaration */: return "interface" /* interfaceElement */;
+            case 231 /* TypeAliasDeclaration */: return "type" /* typeElement */;
+            case 232 /* EnumDeclaration */: return "enum" /* enumElement */;
+            case 226 /* VariableDeclaration */:
                 return getKindOfVariableDeclaration(node);
-            case 169 /* BindingElement */:
+            case 176 /* BindingElement */:
                 return getKindOfVariableDeclaration(ts.getRootDeclaration(node));
-            case 180 /* ArrowFunction */:
-            case 220 /* FunctionDeclaration */:
-            case 179 /* FunctionExpression */:
-                return ts.ScriptElementKind.functionElement;
-            case 149 /* GetAccessor */: return ts.ScriptElementKind.memberGetAccessorElement;
-            case 150 /* SetAccessor */: return ts.ScriptElementKind.memberSetAccessorElement;
-            case 147 /* MethodDeclaration */:
-            case 146 /* MethodSignature */:
-                return ts.ScriptElementKind.memberFunctionElement;
-            case 145 /* PropertyDeclaration */:
-            case 144 /* PropertySignature */:
-                return ts.ScriptElementKind.memberVariableElement;
-            case 153 /* IndexSignature */: return ts.ScriptElementKind.indexSignatureElement;
-            case 152 /* ConstructSignature */: return ts.ScriptElementKind.constructSignatureElement;
-            case 151 /* CallSignature */: return ts.ScriptElementKind.callSignatureElement;
-            case 148 /* Constructor */: return ts.ScriptElementKind.constructorImplementationElement;
-            case 141 /* TypeParameter */: return ts.ScriptElementKind.typeParameterElement;
-            case 255 /* EnumMember */: return ts.ScriptElementKind.enumMemberElement;
-            case 142 /* Parameter */: return ts.hasModifier(node, 92 /* ParameterPropertyModifier */) ? ts.ScriptElementKind.memberVariableElement : ts.ScriptElementKind.parameterElement;
-            case 229 /* ImportEqualsDeclaration */:
-            case 234 /* ImportSpecifier */:
-            case 231 /* ImportClause */:
-            case 238 /* ExportSpecifier */:
-            case 232 /* NamespaceImport */:
-                return ts.ScriptElementKind.alias;
-            case 279 /* JSDocTypedefTag */:
-                return ts.ScriptElementKind.typeElement;
+            case 187 /* ArrowFunction */:
+            case 228 /* FunctionDeclaration */:
+            case 186 /* FunctionExpression */:
+                return "function" /* functionElement */;
+            case 153 /* GetAccessor */: return "getter" /* memberGetAccessorElement */;
+            case 154 /* SetAccessor */: return "setter" /* memberSetAccessorElement */;
+            case 151 /* MethodDeclaration */:
+            case 150 /* MethodSignature */:
+                return "method" /* memberFunctionElement */;
+            case 149 /* PropertyDeclaration */:
+            case 148 /* PropertySignature */:
+                return "property" /* memberVariableElement */;
+            case 157 /* IndexSignature */: return "index" /* indexSignatureElement */;
+            case 156 /* ConstructSignature */: return "construct" /* constructSignatureElement */;
+            case 155 /* CallSignature */: return "call" /* callSignatureElement */;
+            case 152 /* Constructor */: return "constructor" /* constructorImplementationElement */;
+            case 145 /* TypeParameter */: return "type parameter" /* typeParameterElement */;
+            case 264 /* EnumMember */: return "enum member" /* enumMemberElement */;
+            case 146 /* Parameter */: return ts.hasModifier(node, 92 /* ParameterPropertyModifier */) ? "property" /* memberVariableElement */ : "parameter" /* parameterElement */;
+            case 237 /* ImportEqualsDeclaration */:
+            case 242 /* ImportSpecifier */:
+            case 239 /* ImportClause */:
+            case 246 /* ExportSpecifier */:
+            case 240 /* NamespaceImport */:
+                return "alias" /* alias */;
+            case 291 /* JSDocTypedefTag */:
+                return "type" /* typeElement */;
             default:
-                return ts.ScriptElementKind.unknown;
+                return "" /* unknown */;
         }
         function getKindOfVariableDeclaration(v) {
             return ts.isConst(v)
-                ? ts.ScriptElementKind.constElement
+                ? "const" /* constElement */
                 : ts.isLet(v)
-                    ? ts.ScriptElementKind.letElement
-                    : ts.ScriptElementKind.variableElement;
+                    ? "let" /* letElement */
+                    : "var" /* variableElement */;
         }
     }
     ts.getNodeKind = getNodeKind;
-    function getStringLiteralTypeForNode(node, typeChecker) {
-        var searchNode = node.parent.kind === 166 /* LiteralType */ ? node.parent : node;
-        var type = typeChecker.getTypeAtLocation(searchNode);
-        if (type && type.flags & 32 /* StringLiteral */) {
-            return type;
-        }
-        return undefined;
-    }
-    ts.getStringLiteralTypeForNode = getStringLiteralTypeForNode;
     function isThis(node) {
         switch (node.kind) {
-            case 97 /* ThisKeyword */:
+            case 99 /* ThisKeyword */:
                 // case SyntaxKind.ThisType: TODO: GH#9267
                 return true;
-            case 69 /* Identifier */:
+            case 71 /* Identifier */:
                 // 'this' as a parameter
-                return node.originalKeywordKind === 97 /* ThisKeyword */ && node.parent.kind === 142 /* Parameter */;
+                return ts.identifierIsThisKeyword(node) && node.parent.kind === 146 /* Parameter */;
             default:
                 return false;
         }
@@ -61593,7 +73860,7 @@ var ts;
     // Matches the beginning of a triple slash directive
     var tripleSlashDirectivePrefixRegex = /^\/\/\/\s*</;
     function getLineStartPositionForPosition(position, sourceFile) {
-        var lineStarts = sourceFile.getLineStarts();
+        var lineStarts = ts.getLineStarts(sourceFile);
         var line = sourceFile.getLineAndCharacterOfPosition(position).line;
         return lineStarts[line];
     }
@@ -61629,42 +73896,42 @@ var ts;
             return false;
         }
         switch (n.kind) {
-            case 221 /* ClassDeclaration */:
-            case 222 /* InterfaceDeclaration */:
-            case 224 /* EnumDeclaration */:
-            case 171 /* ObjectLiteralExpression */:
-            case 167 /* ObjectBindingPattern */:
-            case 159 /* TypeLiteral */:
-            case 199 /* Block */:
-            case 226 /* ModuleBlock */:
-            case 227 /* CaseBlock */:
-            case 233 /* NamedImports */:
-            case 237 /* NamedExports */:
-                return nodeEndsWith(n, 16 /* CloseBraceToken */, sourceFile);
-            case 252 /* CatchClause */:
+            case 229 /* ClassDeclaration */:
+            case 230 /* InterfaceDeclaration */:
+            case 232 /* EnumDeclaration */:
+            case 178 /* ObjectLiteralExpression */:
+            case 174 /* ObjectBindingPattern */:
+            case 163 /* TypeLiteral */:
+            case 207 /* Block */:
+            case 234 /* ModuleBlock */:
+            case 235 /* CaseBlock */:
+            case 241 /* NamedImports */:
+            case 245 /* NamedExports */:
+                return nodeEndsWith(n, 18 /* CloseBraceToken */, sourceFile);
+            case 260 /* CatchClause */:
                 return isCompletedNode(n.block, sourceFile);
-            case 175 /* NewExpression */:
+            case 182 /* NewExpression */:
                 if (!n.arguments) {
                     return true;
                 }
-            // fall through
-            case 174 /* CallExpression */:
-            case 178 /* ParenthesizedExpression */:
-            case 164 /* ParenthesizedType */:
-                return nodeEndsWith(n, 18 /* CloseParenToken */, sourceFile);
-            case 156 /* FunctionType */:
-            case 157 /* ConstructorType */:
+            // falls through
+            case 181 /* CallExpression */:
+            case 185 /* ParenthesizedExpression */:
+            case 168 /* ParenthesizedType */:
+                return nodeEndsWith(n, 20 /* CloseParenToken */, sourceFile);
+            case 160 /* FunctionType */:
+            case 161 /* ConstructorType */:
                 return isCompletedNode(n.type, sourceFile);
-            case 148 /* Constructor */:
-            case 149 /* GetAccessor */:
-            case 150 /* SetAccessor */:
-            case 220 /* FunctionDeclaration */:
-            case 179 /* FunctionExpression */:
-            case 147 /* MethodDeclaration */:
-            case 146 /* MethodSignature */:
-            case 152 /* ConstructSignature */:
-            case 151 /* CallSignature */:
-            case 180 /* ArrowFunction */:
+            case 152 /* Constructor */:
+            case 153 /* GetAccessor */:
+            case 154 /* SetAccessor */:
+            case 228 /* FunctionDeclaration */:
+            case 186 /* FunctionExpression */:
+            case 151 /* MethodDeclaration */:
+            case 150 /* MethodSignature */:
+            case 156 /* ConstructSignature */:
+            case 155 /* CallSignature */:
+            case 187 /* ArrowFunction */:
                 if (n.body) {
                     return isCompletedNode(n.body, sourceFile);
                 }
@@ -61673,68 +73940,68 @@ var ts;
                 }
                 // Even though type parameters can be unclosed, we can get away with
                 // having at least a closing paren.
-                return hasChildOfKind(n, 18 /* CloseParenToken */, sourceFile);
-            case 225 /* ModuleDeclaration */:
+                return hasChildOfKind(n, 20 /* CloseParenToken */, sourceFile);
+            case 233 /* ModuleDeclaration */:
                 return n.body && isCompletedNode(n.body, sourceFile);
-            case 203 /* IfStatement */:
+            case 211 /* IfStatement */:
                 if (n.elseStatement) {
                     return isCompletedNode(n.elseStatement, sourceFile);
                 }
                 return isCompletedNode(n.thenStatement, sourceFile);
-            case 202 /* ExpressionStatement */:
+            case 210 /* ExpressionStatement */:
                 return isCompletedNode(n.expression, sourceFile) ||
-                    hasChildOfKind(n, 23 /* SemicolonToken */);
-            case 170 /* ArrayLiteralExpression */:
-            case 168 /* ArrayBindingPattern */:
-            case 173 /* ElementAccessExpression */:
-            case 140 /* ComputedPropertyName */:
-            case 161 /* TupleType */:
-                return nodeEndsWith(n, 20 /* CloseBracketToken */, sourceFile);
-            case 153 /* IndexSignature */:
+                    hasChildOfKind(n, 25 /* SemicolonToken */);
+            case 177 /* ArrayLiteralExpression */:
+            case 175 /* ArrayBindingPattern */:
+            case 180 /* ElementAccessExpression */:
+            case 144 /* ComputedPropertyName */:
+            case 165 /* TupleType */:
+                return nodeEndsWith(n, 22 /* CloseBracketToken */, sourceFile);
+            case 157 /* IndexSignature */:
                 if (n.type) {
                     return isCompletedNode(n.type, sourceFile);
                 }
-                return hasChildOfKind(n, 20 /* CloseBracketToken */, sourceFile);
-            case 249 /* CaseClause */:
-            case 250 /* DefaultClause */:
+                return hasChildOfKind(n, 22 /* CloseBracketToken */, sourceFile);
+            case 257 /* CaseClause */:
+            case 258 /* DefaultClause */:
                 // there is no such thing as terminator token for CaseClause/DefaultClause so for simplicity always consider them non-completed
                 return false;
-            case 206 /* ForStatement */:
-            case 207 /* ForInStatement */:
-            case 208 /* ForOfStatement */:
-            case 205 /* WhileStatement */:
+            case 214 /* ForStatement */:
+            case 215 /* ForInStatement */:
+            case 216 /* ForOfStatement */:
+            case 213 /* WhileStatement */:
                 return isCompletedNode(n.statement, sourceFile);
-            case 204 /* DoStatement */:
+            case 212 /* DoStatement */:
                 // rough approximation: if DoStatement has While keyword - then if node is completed is checking the presence of ')';
-                var hasWhileKeyword = findChildOfKind(n, 104 /* WhileKeyword */, sourceFile);
+                var hasWhileKeyword = findChildOfKind(n, 106 /* WhileKeyword */, sourceFile);
                 if (hasWhileKeyword) {
-                    return nodeEndsWith(n, 18 /* CloseParenToken */, sourceFile);
+                    return nodeEndsWith(n, 20 /* CloseParenToken */, sourceFile);
                 }
                 return isCompletedNode(n.statement, sourceFile);
-            case 158 /* TypeQuery */:
+            case 162 /* TypeQuery */:
                 return isCompletedNode(n.exprName, sourceFile);
-            case 182 /* TypeOfExpression */:
-            case 181 /* DeleteExpression */:
-            case 183 /* VoidExpression */:
-            case 190 /* YieldExpression */:
-            case 191 /* SpreadElementExpression */:
+            case 189 /* TypeOfExpression */:
+            case 188 /* DeleteExpression */:
+            case 190 /* VoidExpression */:
+            case 197 /* YieldExpression */:
+            case 198 /* SpreadElement */:
                 var unaryWordExpression = n;
                 return isCompletedNode(unaryWordExpression.expression, sourceFile);
-            case 176 /* TaggedTemplateExpression */:
+            case 183 /* TaggedTemplateExpression */:
                 return isCompletedNode(n.template, sourceFile);
-            case 189 /* TemplateExpression */:
+            case 196 /* TemplateExpression */:
                 var lastSpan = ts.lastOrUndefined(n.templateSpans);
                 return isCompletedNode(lastSpan, sourceFile);
-            case 197 /* TemplateSpan */:
+            case 205 /* TemplateSpan */:
                 return ts.nodeIsPresent(n.literal);
-            case 236 /* ExportDeclaration */:
-            case 230 /* ImportDeclaration */:
+            case 244 /* ExportDeclaration */:
+            case 238 /* ImportDeclaration */:
                 return ts.nodeIsPresent(n.moduleSpecifier);
-            case 185 /* PrefixUnaryExpression */:
+            case 192 /* PrefixUnaryExpression */:
                 return isCompletedNode(n.operand, sourceFile);
-            case 187 /* BinaryExpression */:
+            case 194 /* BinaryExpression */:
                 return isCompletedNode(n.right, sourceFile);
-            case 188 /* ConditionalExpression */:
+            case 195 /* ConditionalExpression */:
                 return isCompletedNode(n.whenFalse, sourceFile);
             default:
                 return true;
@@ -61752,7 +74019,7 @@ var ts;
             if (last.kind === expectedLastToken) {
                 return true;
             }
-            else if (last.kind === 23 /* SemicolonToken */ && children.length !== 1) {
+            else if (last.kind === 25 /* SemicolonToken */ && children.length !== 1) {
                 return children[children.length - 2].kind === expectedLastToken;
             }
         }
@@ -61790,7 +74057,7 @@ var ts;
         // for the position of the relevant node (or comma).
         var syntaxList = ts.forEach(node.parent.getChildren(), function (c) {
             // find syntax list that covers the span of the node
-            if (c.kind === 286 /* SyntaxList */ && c.pos <= node.pos && c.end >= node.end) {
+            if (c.kind === 295 /* SyntaxList */ && c.pos <= node.pos && c.end >= node.end) {
                 return c;
             }
         });
@@ -61803,78 +74070,56 @@ var ts;
      * position >= start and (position < end or (position === end && token is keyword or identifier))
      */
     function getTouchingWord(sourceFile, position, includeJsDocComment) {
-        if (includeJsDocComment === void 0) { includeJsDocComment = false; }
-        return getTouchingToken(sourceFile, position, function (n) { return isWord(n.kind); }, includeJsDocComment);
+        return getTouchingToken(sourceFile, position, includeJsDocComment, function (n) { return isWord(n.kind); });
     }
     ts.getTouchingWord = getTouchingWord;
     /* Gets the token whose text has range [start, end) and position >= start
      * and (position < end or (position === end && token is keyword or identifier or numeric/string literal))
      */
     function getTouchingPropertyName(sourceFile, position, includeJsDocComment) {
-        if (includeJsDocComment === void 0) { includeJsDocComment = false; }
-        return getTouchingToken(sourceFile, position, function (n) { return isPropertyName(n.kind); }, includeJsDocComment);
+        return getTouchingToken(sourceFile, position, includeJsDocComment, function (n) { return isPropertyName(n.kind); });
     }
     ts.getTouchingPropertyName = getTouchingPropertyName;
-    /** Returns the token if position is in [start, end) or if position === end and includeItemAtEndPosition(token) === true */
-    function getTouchingToken(sourceFile, position, includeItemAtEndPosition, includeJsDocComment) {
-        if (includeJsDocComment === void 0) { includeJsDocComment = false; }
-        return getTokenAtPositionWorker(sourceFile, position, /*allowPositionInLeadingTrivia*/ false, includeItemAtEndPosition, includeJsDocComment);
+    /**
+     * Returns the token if position is in [start, end).
+     * If position === end, returns the preceding token if includeItemAtEndPosition(previousToken) === true
+     */
+    function getTouchingToken(sourceFile, position, includeJsDocComment, includePrecedingTokenAtEndPosition) {
+        return getTokenAtPositionWorker(sourceFile, position, /*allowPositionInLeadingTrivia*/ false, includePrecedingTokenAtEndPosition, /*includeEndPosition*/ false, includeJsDocComment);
     }
     ts.getTouchingToken = getTouchingToken;
     /** Returns a token if position is in [start-of-leading-trivia, end) */
-    function getTokenAtPosition(sourceFile, position, includeJsDocComment) {
-        if (includeJsDocComment === void 0) { includeJsDocComment = false; }
-        return getTokenAtPositionWorker(sourceFile, position, /*allowPositionInLeadingTrivia*/ true, /*includeItemAtEndPosition*/ undefined, includeJsDocComment);
+    function getTokenAtPosition(sourceFile, position, includeJsDocComment, includeEndPosition) {
+        return getTokenAtPositionWorker(sourceFile, position, /*allowPositionInLeadingTrivia*/ true, /*includePrecedingTokenAtEndPosition*/ undefined, includeEndPosition, includeJsDocComment);
     }
     ts.getTokenAtPosition = getTokenAtPosition;
     /** Get the token whose text contains the position */
-    function getTokenAtPositionWorker(sourceFile, position, allowPositionInLeadingTrivia, includeItemAtEndPosition, includeJsDocComment) {
-        if (includeJsDocComment === void 0) { includeJsDocComment = false; }
+    function getTokenAtPositionWorker(sourceFile, position, allowPositionInLeadingTrivia, includePrecedingTokenAtEndPosition, includeEndPosition, includeJsDocComment) {
         var current = sourceFile;
         outer: while (true) {
-            if (isToken(current)) {
+            if (ts.isToken(current)) {
                 // exit early
                 return current;
             }
-            if (includeJsDocComment) {
-                var jsDocChildren = ts.filter(current.getChildren(), ts.isJSDocNode);
-                for (var _i = 0, jsDocChildren_1 = jsDocChildren; _i < jsDocChildren_1.length; _i++) {
-                    var jsDocChild = jsDocChildren_1[_i];
-                    var start = allowPositionInLeadingTrivia ? jsDocChild.getFullStart() : jsDocChild.getStart(sourceFile, includeJsDocComment);
-                    if (start <= position) {
-                        var end = jsDocChild.getEnd();
-                        if (position < end || (position === end && jsDocChild.kind === 1 /* EndOfFileToken */)) {
-                            current = jsDocChild;
-                            continue outer;
-                        }
-                        else if (includeItemAtEndPosition && end === position) {
-                            var previousToken = findPrecedingToken(position, sourceFile, jsDocChild);
-                            if (previousToken && includeItemAtEndPosition(previousToken)) {
-                                return previousToken;
-                            }
-                        }
-                    }
-                }
-            }
             // find the child that contains 'position'
-            for (var i = 0, n = current.getChildCount(sourceFile); i < n; i++) {
-                var child = current.getChildAt(i);
-                // all jsDocComment nodes were already visited
-                if (ts.isJSDocNode(child)) {
+            for (var _i = 0, _a = current.getChildren(); _i < _a.length; _i++) {
+                var child = _a[_i];
+                if (!includeJsDocComment && ts.isJSDocNode(child)) {
                     continue;
                 }
                 var start = allowPositionInLeadingTrivia ? child.getFullStart() : child.getStart(sourceFile, includeJsDocComment);
-                if (start <= position) {
-                    var end = child.getEnd();
-                    if (position < end || (position === end && child.kind === 1 /* EndOfFileToken */)) {
-                        current = child;
-                        continue outer;
-                    }
-                    else if (includeItemAtEndPosition && end === position) {
-                        var previousToken = findPrecedingToken(position, sourceFile, child);
-                        if (previousToken && includeItemAtEndPosition(previousToken)) {
-                            return previousToken;
-                        }
+                if (start > position) {
+                    continue;
+                }
+                var end = child.getEnd();
+                if (position < end || (position === end && (child.kind === 1 /* EndOfFileToken */ || includeEndPosition))) {
+                    current = child;
+                    continue outer;
+                }
+                else if (includePrecedingTokenAtEndPosition && end === position) {
+                    var previousToken = findPrecedingToken(position, sourceFile, child);
+                    if (previousToken && includePrecedingTokenAtEndPosition(previousToken)) {
+                        return previousToken;
                     }
                 }
             }
@@ -61882,18 +74127,18 @@ var ts;
         }
     }
     /**
-      * The token on the left of the position is the token that strictly includes the position
-      * or sits to the left of the cursor if it is on a boundary. For example
-      *
-      *   fo|o               -> will return foo
-      *   foo <comment> |bar -> will return foo
-      *
-      */
+     * The token on the left of the position is the token that strictly includes the position
+     * or sits to the left of the cursor if it is on a boundary. For example
+     *
+     *   fo|o               -> will return foo
+     *   foo <comment> |bar -> will return foo
+     *
+     */
     function findTokenOnLeftOfPosition(file, position) {
         // Ideally, getTokenAtPosition should return a token. However, it is currently
         // broken, so we do a check to make sure the result was indeed a token.
-        var tokenAtPosition = getTokenAtPosition(file, position);
-        if (isToken(tokenAtPosition) && position > tokenAtPosition.getStart(file) && position < tokenAtPosition.getEnd()) {
+        var tokenAtPosition = getTokenAtPosition(file, position, /*includeJsDocComment*/ false);
+        if (ts.isToken(tokenAtPosition) && position > tokenAtPosition.getStart(file) && position < tokenAtPosition.getEnd()) {
             return tokenAtPosition;
         }
         return findPrecedingToken(position, file);
@@ -61902,7 +74147,7 @@ var ts;
     function findNextToken(previousToken, parent) {
         return find(parent);
         function find(n) {
-            if (isToken(n) && n.pos === previousToken.end) {
+            if (ts.isToken(n) && n.pos === previousToken.end) {
                 // this is token that starts at the end of previous token - return it
                 return n;
             }
@@ -61922,10 +74167,10 @@ var ts;
         }
     }
     ts.findNextToken = findNextToken;
-    function findPrecedingToken(position, sourceFile, startNode) {
+    function findPrecedingToken(position, sourceFile, startNode, includeJsDoc) {
         return find(startNode || sourceFile);
         function findRightmostToken(n) {
-            if (isToken(n) || n.kind === 244 /* JsxText */) {
+            if (ts.isToken(n)) {
                 return n;
             }
             var children = n.getChildren();
@@ -61933,11 +74178,11 @@ var ts;
             return candidate && findRightmostToken(candidate);
         }
         function find(n) {
-            if (isToken(n) || n.kind === 244 /* JsxText */) {
+            if (ts.isToken(n)) {
                 return n;
             }
             var children = n.getChildren();
-            for (var i = 0, len = children.length; i < len; i++) {
+            for (var i = 0; i < children.length; i++) {
                 var child = children[i];
                 // condition 'position < child.end' checks if child node end after the position
                 // in the example below this condition will be false for 'aaaa' and 'bbbb' and true for 'ccc'
@@ -61947,10 +74192,10 @@ var ts;
                 // if no - position is in the node itself so we should recurse in it.
                 // NOTE: JsxText is a weird kind of node that can contain only whitespaces (since they are not counted as trivia).
                 // if this is the case - then we should assume that token in question is located in previous child.
-                if (position < child.end && (nodeHasTokens(child) || child.kind === 244 /* JsxText */)) {
-                    var start = child.getStart(sourceFile);
+                if (position < child.end && (nodeHasTokens(child) || child.kind === 10 /* JsxText */)) {
+                    var start = child.getStart(sourceFile, includeJsDoc);
                     var lookInPreviousChild = (start >= position) ||
-                        (child.kind === 244 /* JsxText */ && start === child.end); // whitespace only JsxText
+                        (child.kind === 10 /* JsxText */ && start === child.end); // whitespace only JsxText
                     if (lookInPreviousChild) {
                         // actual start of the node is past the position - previous token should be at the end of previous child
                         var candidate = findRightmostChildNodeWithTokens(children, /*exclusiveStartPosition*/ i);
@@ -61962,7 +74207,7 @@ var ts;
                     }
                 }
             }
-            ts.Debug.assert(startNode !== undefined || n.kind === 256 /* SourceFile */);
+            ts.Debug.assert(startNode !== undefined || n.kind === 265 /* SourceFile */ || ts.isJSDocCommentContainingNode(n));
             // Here we know that none of child token nodes embrace the position,
             // the only known case is when position is at the end of the file.
             // Try to find the rightmost token in the file without filtering.
@@ -62001,55 +74246,65 @@ var ts;
         return false;
     }
     ts.isInString = isInString;
-    function isInComment(sourceFile, position) {
-        return isInCommentHelper(sourceFile, position, /*predicate*/ undefined);
-    }
-    ts.isInComment = isInComment;
     /**
      * returns true if the position is in between the open and close elements of an JSX expression.
      */
     function isInsideJsxElementOrAttribute(sourceFile, position) {
-        var token = getTokenAtPosition(sourceFile, position);
+        var token = getTokenAtPosition(sourceFile, position, /*includeJsDocComment*/ false);
         if (!token) {
             return false;
         }
-        if (token.kind === 244 /* JsxText */) {
+        if (token.kind === 10 /* JsxText */) {
             return true;
         }
         // <div>Hello |</div>
-        if (token.kind === 25 /* LessThanToken */ && token.parent.kind === 244 /* JsxText */) {
+        if (token.kind === 27 /* LessThanToken */ && token.parent.kind === 10 /* JsxText */) {
             return true;
         }
         // <div> { | </div> or <div a={| </div>
-        if (token.kind === 25 /* LessThanToken */ && token.parent.kind === 248 /* JsxExpression */) {
+        if (token.kind === 27 /* LessThanToken */ && token.parent.kind === 256 /* JsxExpression */) {
             return true;
         }
         // <div> {
         // |
         // } < /div>
-        if (token && token.kind === 16 /* CloseBraceToken */ && token.parent.kind === 248 /* JsxExpression */) {
+        if (token && token.kind === 18 /* CloseBraceToken */ && token.parent.kind === 256 /* JsxExpression */) {
             return true;
         }
         // <div>|</div>
-        if (token.kind === 25 /* LessThanToken */ && token.parent.kind === 245 /* JsxClosingElement */) {
+        if (token.kind === 27 /* LessThanToken */ && token.parent.kind === 252 /* JsxClosingElement */) {
             return true;
         }
         return false;
     }
     ts.isInsideJsxElementOrAttribute = isInsideJsxElementOrAttribute;
     function isInTemplateString(sourceFile, position) {
-        var token = getTokenAtPosition(sourceFile, position);
+        var token = getTokenAtPosition(sourceFile, position, /*includeJsDocComment*/ false);
         return ts.isTemplateLiteralKind(token.kind) && position > token.getStart(sourceFile);
     }
     ts.isInTemplateString = isInTemplateString;
     /**
-     * Returns true if the cursor at position in sourceFile is within a comment that additionally
-     * satisfies predicate, and false otherwise.
+     * Returns true if the cursor at position in sourceFile is within a comment.
+     *
+     * @param tokenAtPosition Must equal `getTokenAtPosition(sourceFile, position)
+     * @param predicate Additional predicate to test on the comment range.
      */
-    function isInCommentHelper(sourceFile, position, predicate) {
-        var token = getTokenAtPosition(sourceFile, position);
-        if (token && position <= token.getStart(sourceFile)) {
-            var commentRanges = ts.getLeadingCommentRanges(sourceFile.text, token.pos);
+    function isInComment(sourceFile, position, tokenAtPosition, predicate) {
+        if (tokenAtPosition === void 0) { tokenAtPosition = getTokenAtPosition(sourceFile, position, /*includeJsDocComment*/ false); }
+        return position <= tokenAtPosition.getStart(sourceFile) &&
+            (isInCommentRange(ts.getLeadingCommentRanges(sourceFile.text, tokenAtPosition.pos)) ||
+                isInCommentRange(ts.getTrailingCommentRanges(sourceFile.text, tokenAtPosition.pos)));
+        function isInCommentRange(commentRanges) {
+            return ts.forEach(commentRanges, function (c) { return isPositionInCommentRange(c, position, sourceFile.text) && (!predicate || predicate(c)); });
+        }
+    }
+    ts.isInComment = isInComment;
+    function isPositionInCommentRange(_a, position, text) {
+        var pos = _a.pos, end = _a.end, kind = _a.kind;
+        if (pos < position && position < end) {
+            return true;
+        }
+        else if (position === end) {
             // The end marker of a single-line comment does not include the newline character.
             // In the following case, we are inside a comment (^ denotes the cursor position):
             //
@@ -62060,18 +74315,16 @@ var ts;
             //    /* asdf */^
             //
             // Internally, we represent the end of the comment at the newline and closing '/', respectively.
-            return predicate ?
-                ts.forEach(commentRanges, function (c) { return c.pos < position &&
-                    (c.kind == 2 /* SingleLineCommentTrivia */ ? position <= c.end : position < c.end) &&
-                    predicate(c); }) :
-                ts.forEach(commentRanges, function (c) { return c.pos < position &&
-                    (c.kind == 2 /* SingleLineCommentTrivia */ ? position <= c.end : position < c.end); });
+            return kind === 2 /* SingleLineCommentTrivia */ ||
+                // true for unterminated multi-line comment
+                !(text.charCodeAt(end - 1) === 47 /* slash */ && text.charCodeAt(end - 2) === 42 /* asterisk */);
+        }
+        else {
+            return false;
         }
-        return false;
     }
-    ts.isInCommentHelper = isInCommentHelper;
     function hasDocComment(sourceFile, position) {
-        var token = getTokenAtPosition(sourceFile, position);
+        var token = getTokenAtPosition(sourceFile, position, /*includeJsDocComment*/ false);
         // First, we have to see if this position actually landed in a comment.
         var commentRanges = ts.getLeadingCommentRanges(sourceFile.text, token.pos);
         return ts.forEach(commentRanges, jsDocPrefix);
@@ -62081,42 +74334,6 @@ var ts;
         }
     }
     ts.hasDocComment = hasDocComment;
-    /**
-     * Get the corresponding JSDocTag node if the position is in a jsDoc comment
-     */
-    function getJsDocTagAtPosition(sourceFile, position) {
-        var node = ts.getTokenAtPosition(sourceFile, position);
-        if (isToken(node)) {
-            switch (node.kind) {
-                case 102 /* VarKeyword */:
-                case 108 /* LetKeyword */:
-                case 74 /* ConstKeyword */:
-                    // if the current token is var, let or const, skip the VariableDeclarationList
-                    node = node.parent === undefined ? undefined : node.parent.parent;
-                    break;
-                default:
-                    node = node.parent;
-                    break;
-            }
-        }
-        if (node) {
-            if (node.jsDocComments) {
-                for (var _i = 0, _a = node.jsDocComments; _i < _a.length; _i++) {
-                    var jsDocComment = _a[_i];
-                    if (jsDocComment.tags) {
-                        for (var _b = 0, _c = jsDocComment.tags; _b < _c.length; _b++) {
-                            var tag = _c[_b];
-                            if (tag.pos <= position && position <= tag.end) {
-                                return tag;
-                            }
-                        }
-                    }
-                }
-            }
-        }
-        return undefined;
-    }
-    ts.getJsDocTagAtPosition = getJsDocTagAtPosition;
     function nodeHasTokens(n) {
         // If we have a token or node that has a non-zero width, it must have tokens.
         // Note, that getWidth() does not take trivia into account.
@@ -62126,38 +74343,34 @@ var ts;
         var flags = ts.getCombinedModifierFlags(node);
         var result = [];
         if (flags & 8 /* Private */)
-            result.push(ts.ScriptElementKindModifier.privateMemberModifier);
+            result.push("private" /* privateMemberModifier */);
         if (flags & 16 /* Protected */)
-            result.push(ts.ScriptElementKindModifier.protectedMemberModifier);
+            result.push("protected" /* protectedMemberModifier */);
         if (flags & 4 /* Public */)
-            result.push(ts.ScriptElementKindModifier.publicMemberModifier);
+            result.push("public" /* publicMemberModifier */);
         if (flags & 32 /* Static */)
-            result.push(ts.ScriptElementKindModifier.staticModifier);
+            result.push("static" /* staticModifier */);
         if (flags & 128 /* Abstract */)
-            result.push(ts.ScriptElementKindModifier.abstractModifier);
+            result.push("abstract" /* abstractModifier */);
         if (flags & 1 /* Export */)
-            result.push(ts.ScriptElementKindModifier.exportedModifier);
+            result.push("export" /* exportedModifier */);
         if (ts.isInAmbientContext(node))
-            result.push(ts.ScriptElementKindModifier.ambientModifier);
-        return result.length > 0 ? result.join(",") : ts.ScriptElementKindModifier.none;
+            result.push("declare" /* ambientModifier */);
+        return result.length > 0 ? result.join(",") : "" /* none */;
     }
     ts.getNodeModifiers = getNodeModifiers;
     function getTypeArgumentOrTypeParameterList(node) {
-        if (node.kind === 155 /* TypeReference */ || node.kind === 174 /* CallExpression */) {
+        if (node.kind === 159 /* TypeReference */ || node.kind === 181 /* CallExpression */) {
             return node.typeArguments;
         }
-        if (ts.isFunctionLike(node) || node.kind === 221 /* ClassDeclaration */ || node.kind === 222 /* InterfaceDeclaration */) {
+        if (ts.isFunctionLike(node) || node.kind === 229 /* ClassDeclaration */ || node.kind === 230 /* InterfaceDeclaration */) {
             return node.typeParameters;
         }
         return undefined;
     }
     ts.getTypeArgumentOrTypeParameterList = getTypeArgumentOrTypeParameterList;
-    function isToken(n) {
-        return n.kind >= 0 /* FirstToken */ && n.kind <= 138 /* LastToken */;
-    }
-    ts.isToken = isToken;
     function isWord(kind) {
-        return kind === 69 /* Identifier */ || ts.isKeyword(kind);
+        return kind === 71 /* Identifier */ || ts.isKeyword(kind);
     }
     ts.isWord = isWord;
     function isPropertyName(kind) {
@@ -62169,7 +74382,7 @@ var ts;
     ts.isComment = isComment;
     function isStringOrRegularExpressionOrTemplateLiteral(kind) {
         if (kind === 9 /* StringLiteral */
-            || kind === 10 /* RegularExpressionLiteral */
+            || kind === 12 /* RegularExpressionLiteral */
             || ts.isTemplateLiteralKind(kind)) {
             return true;
         }
@@ -62177,7 +74390,7 @@ var ts;
     }
     ts.isStringOrRegularExpressionOrTemplateLiteral = isStringOrRegularExpressionOrTemplateLiteral;
     function isPunctuation(kind) {
-        return 15 /* FirstPunctuation */ <= kind && kind <= 68 /* LastPunctuation */;
+        return 17 /* FirstPunctuation */ <= kind && kind <= 70 /* LastPunctuation */;
     }
     ts.isPunctuation = isPunctuation;
     function isInsideTemplateLiteral(node, position) {
@@ -62187,15 +74400,24 @@ var ts;
     ts.isInsideTemplateLiteral = isInsideTemplateLiteral;
     function isAccessibilityModifier(kind) {
         switch (kind) {
-            case 112 /* PublicKeyword */:
-            case 110 /* PrivateKeyword */:
-            case 111 /* ProtectedKeyword */:
+            case 114 /* PublicKeyword */:
+            case 112 /* PrivateKeyword */:
+            case 113 /* ProtectedKeyword */:
                 return true;
         }
         return false;
     }
     ts.isAccessibilityModifier = isAccessibilityModifier;
+    function cloneCompilerOptions(options) {
+        var result = ts.clone(options);
+        ts.setConfigFileInOptions(result, options && options.configFile);
+        return result;
+    }
+    ts.cloneCompilerOptions = cloneCompilerOptions;
     function compareDataObjects(dst, src) {
+        if (!dst || !src || Object.keys(dst).length !== Object.keys(src).length) {
+            return false;
+        }
         for (var e in dst) {
             if (typeof dst[e] === "object") {
                 if (!compareDataObjects(dst[e], src[e])) {
@@ -62212,18 +74434,18 @@ var ts;
     }
     ts.compareDataObjects = compareDataObjects;
     function isArrayLiteralOrObjectLiteralDestructuringPattern(node) {
-        if (node.kind === 170 /* ArrayLiteralExpression */ ||
-            node.kind === 171 /* ObjectLiteralExpression */) {
+        if (node.kind === 177 /* ArrayLiteralExpression */ ||
+            node.kind === 178 /* ObjectLiteralExpression */) {
             // [a,b,c] from:
             // [a, b, c] = someExpression;
-            if (node.parent.kind === 187 /* BinaryExpression */ &&
+            if (node.parent.kind === 194 /* BinaryExpression */ &&
                 node.parent.left === node &&
-                node.parent.operatorToken.kind === 56 /* EqualsToken */) {
+                node.parent.operatorToken.kind === 58 /* EqualsToken */) {
                 return true;
             }
             // [a, b, c] from:
             // for([a, b, c] of expression)
-            if (node.parent.kind === 208 /* ForOfStatement */ &&
+            if (node.parent.kind === 216 /* ForOfStatement */ &&
                 node.parent.initializer === node) {
                 return true;
             }
@@ -62231,7 +74453,7 @@ var ts;
             // [x, [a, b, c] ] = someExpression
             // or
             // {x, a: {a, b, c} } = someExpression
-            if (isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent.kind === 253 /* PropertyAssignment */ ? node.parent.parent : node.parent)) {
+            if (isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent.kind === 261 /* PropertyAssignment */ ? node.parent.parent : node.parent)) {
                 return true;
             }
         }
@@ -62244,28 +74466,64 @@ var ts;
     }
     ts.hasTrailingDirectorySeparator = hasTrailingDirectorySeparator;
     function isInReferenceComment(sourceFile, position) {
-        return isInCommentHelper(sourceFile, position, isReferenceComment);
-        function isReferenceComment(c) {
+        return isInComment(sourceFile, position, /*tokenAtPosition*/ undefined, function (c) {
             var commentText = sourceFile.text.substring(c.pos, c.end);
             return tripleSlashDirectivePrefixRegex.test(commentText);
-        }
+        });
     }
     ts.isInReferenceComment = isInReferenceComment;
     function isInNonReferenceComment(sourceFile, position) {
-        return isInCommentHelper(sourceFile, position, isNonReferenceComment);
-        function isNonReferenceComment(c) {
+        return isInComment(sourceFile, position, /*tokenAtPosition*/ undefined, function (c) {
             var commentText = sourceFile.text.substring(c.pos, c.end);
             return !tripleSlashDirectivePrefixRegex.test(commentText);
-        }
+        });
     }
     ts.isInNonReferenceComment = isInNonReferenceComment;
+    function createTextSpanFromNode(node, sourceFile) {
+        return ts.createTextSpanFromBounds(node.getStart(sourceFile), node.getEnd());
+    }
+    ts.createTextSpanFromNode = createTextSpanFromNode;
+    function createTextSpanFromRange(range) {
+        return ts.createTextSpanFromBounds(range.pos, range.end);
+    }
+    ts.createTextSpanFromRange = createTextSpanFromRange;
+    function isTypeKeyword(kind) {
+        switch (kind) {
+            case 119 /* AnyKeyword */:
+            case 122 /* BooleanKeyword */:
+            case 130 /* NeverKeyword */:
+            case 133 /* NumberKeyword */:
+            case 134 /* ObjectKeyword */:
+            case 136 /* StringKeyword */:
+            case 137 /* SymbolKeyword */:
+            case 105 /* VoidKeyword */:
+                return true;
+            default:
+                return false;
+        }
+    }
+    ts.isTypeKeyword = isTypeKeyword;
+    /** True if the symbol is for an external module, as opposed to a namespace. */
+    function isExternalModuleSymbol(moduleSymbol) {
+        ts.Debug.assert(!!(moduleSymbol.flags & 1536 /* Module */));
+        return moduleSymbol.name.charCodeAt(0) === 34 /* doubleQuote */;
+    }
+    ts.isExternalModuleSymbol = isExternalModuleSymbol;
+    /** Returns `true` the first time it encounters a node and `false` afterwards. */
+    function nodeSeenTracker() {
+        var seen = [];
+        return function (node) {
+            var id = ts.getNodeId(node);
+            return !seen[id] && (seen[id] = true);
+        };
+    }
+    ts.nodeSeenTracker = nodeSeenTracker;
 })(ts || (ts = {}));
 // Display-part writer helpers
 /* @internal */
-var ts;
 (function (ts) {
     function isFirstDeclarationOfSymbolParameter(symbol) {
-        return symbol.declarations && symbol.declarations.length > 0 && symbol.declarations[0].kind === 142 /* Parameter */;
+        return symbol.declarations && symbol.declarations.length > 0 && symbol.declarations[0].kind === 146 /* Parameter */;
     }
     ts.isFirstDeclarationOfSymbolParameter = isFirstDeclarationOfSymbolParameter;
     var displayPartWriter = getDisplayPartWriter();
@@ -62282,13 +74540,15 @@ var ts;
             writeSpace: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.space); },
             writeStringLiteral: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.stringLiteral); },
             writeParameter: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.parameterName); },
+            writeProperty: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.propertyName); },
             writeSymbol: writeSymbol,
             writeLine: writeLine,
             increaseIndent: function () { indent++; },
             decreaseIndent: function () { indent--; },
             clear: resetWriter,
-            trackSymbol: function () { },
-            reportInaccessibleThisError: function () { }
+            trackSymbol: ts.noop,
+            reportInaccessibleThisError: ts.noop,
+            reportPrivateInBaseOfClassExpression: ts.noop,
         };
         function writeIndent() {
             if (lineStart) {
@@ -62318,7 +74578,7 @@ var ts;
         }
     }
     function symbolPart(text, symbol) {
-        return displayPart(text, displayPartKind(symbol), symbol);
+        return displayPart(text, displayPartKind(symbol));
         function displayPartKind(symbol) {
             var flags = symbol.flags;
             if (flags & 3 /* Variable */) {
@@ -62367,7 +74627,7 @@ var ts;
         }
     }
     ts.symbolPart = symbolPart;
-    function displayPart(text, kind, symbol) {
+    function displayPart(text, kind) {
         return {
             text: text,
             kind: ts.SymbolDisplayPartKind[kind]
@@ -62441,23 +74701,18 @@ var ts;
     function getDeclaredName(typeChecker, symbol, location) {
         // If this is an export or import specifier it could have been renamed using the 'as' syntax.
         // If so we want to search for whatever is under the cursor.
-        if (isImportOrExportSpecifierName(location)) {
-            return location.getText();
-        }
-        else if (ts.isStringOrNumericLiteral(location.kind) &&
-            location.parent.kind === 140 /* ComputedPropertyName */) {
+        if (isImportOrExportSpecifierName(location) || ts.isStringOrNumericLiteral(location) && location.parent.kind === 144 /* ComputedPropertyName */) {
             return location.text;
         }
         // Try to get the local symbol if we're dealing with an 'export default'
         // since that symbol has the "true" name.
         var localExportDefaultSymbol = ts.getLocalSymbolForExportDefault(symbol);
-        var name = typeChecker.symbolToString(localExportDefaultSymbol || symbol);
-        return name;
+        return typeChecker.symbolToString(localExportDefaultSymbol || symbol);
     }
     ts.getDeclaredName = getDeclaredName;
     function isImportOrExportSpecifierName(location) {
         return location.parent &&
-            (location.parent.kind === 234 /* ImportSpecifier */ || location.parent.kind === 238 /* ExportSpecifier */) &&
+            (location.parent.kind === 242 /* ImportSpecifier */ || location.parent.kind === 246 /* ExportSpecifier */) &&
             location.parent.propertyName === location;
     }
     ts.isImportOrExportSpecifierName = isImportOrExportSpecifierName;
@@ -62473,7 +74728,6 @@ var ts;
             (name.charCodeAt(0) === 34 /* doubleQuote */ || name.charCodeAt(0) === 39 /* singleQuote */)) {
             return name.substring(1, length - 1);
         }
-        ;
         return name;
     }
     ts.stripQuotes = stripQuotes;
@@ -62499,54 +74753,45 @@ var ts;
         return ts.ensureScriptKind(fileName, scriptKind);
     }
     ts.getScriptKind = getScriptKind;
-    function sanitizeConfigFile(configFileName, content) {
-        var options = {
-            fileName: "config.js",
-            compilerOptions: {
-                target: 2 /* ES6 */,
-                removeComments: true
-            },
-            reportDiagnostics: true
-        };
-        var _a = ts.transpileModule("(" + content + ")", options), outputText = _a.outputText, diagnostics = _a.diagnostics;
-        // Becasue the content was wrapped in "()", the start position of diagnostics needs to be subtract by 1
-        // also, the emitted result will have "(" in the beginning and ");" in the end. We need to strip these
-        // as well
-        var trimmedOutput = outputText.trim();
-        for (var _i = 0, diagnostics_3 = diagnostics; _i < diagnostics_3.length; _i++) {
-            var diagnostic = diagnostics_3[_i];
-            diagnostic.start = diagnostic.start - 1;
+    function getFirstNonSpaceCharacterPosition(text, position) {
+        while (ts.isWhiteSpaceLike(text.charCodeAt(position))) {
+            position += 1;
         }
-        var _b = ts.parseConfigFileTextToJson(configFileName, trimmedOutput.substring(1, trimmedOutput.length - 2), /*stripComments*/ false), config = _b.config, error = _b.error;
-        return {
-            configJsonObject: config || {},
-            diagnostics: error ? ts.concatenate(diagnostics, [error]) : diagnostics
-        };
+        return position;
+    }
+    ts.getFirstNonSpaceCharacterPosition = getFirstNonSpaceCharacterPosition;
+    function getOpenBrace(constructor, sourceFile) {
+        // First token is the open curly, this is where we want to put the 'super' call.
+        return constructor.body.getFirstToken(sourceFile);
     }
-    ts.sanitizeConfigFile = sanitizeConfigFile;
+    ts.getOpenBrace = getOpenBrace;
+    function getOpenBraceOfClassLike(declaration, sourceFile) {
+        return ts.getTokenAtPosition(sourceFile, declaration.members.pos - 1, /*includeJsDocComment*/ false);
+    }
+    ts.getOpenBraceOfClassLike = getOpenBraceOfClassLike;
 })(ts || (ts = {}));
 var ts;
 (function (ts) {
     /// Classifier
     function createClassifier() {
-        var scanner = ts.createScanner(2 /* Latest */, /*skipTrivia*/ false);
+        var scanner = ts.createScanner(5 /* Latest */, /*skipTrivia*/ false);
         /// We do not have a full parser support to know when we should parse a regex or not
         /// If we consider every slash token to be a regex, we could be missing cases like "1/2/3", where
         /// we have a series of divide operator. this list allows us to be more accurate by ruling out
         /// locations where a regexp cannot exist.
         var noRegexTable = [];
-        noRegexTable[69 /* Identifier */] = true;
+        noRegexTable[71 /* Identifier */] = true;
         noRegexTable[9 /* StringLiteral */] = true;
         noRegexTable[8 /* NumericLiteral */] = true;
-        noRegexTable[10 /* RegularExpressionLiteral */] = true;
-        noRegexTable[97 /* ThisKeyword */] = true;
-        noRegexTable[41 /* PlusPlusToken */] = true;
-        noRegexTable[42 /* MinusMinusToken */] = true;
-        noRegexTable[18 /* CloseParenToken */] = true;
-        noRegexTable[20 /* CloseBracketToken */] = true;
-        noRegexTable[16 /* CloseBraceToken */] = true;
-        noRegexTable[99 /* TrueKeyword */] = true;
-        noRegexTable[84 /* FalseKeyword */] = true;
+        noRegexTable[12 /* RegularExpressionLiteral */] = true;
+        noRegexTable[99 /* ThisKeyword */] = true;
+        noRegexTable[43 /* PlusPlusToken */] = true;
+        noRegexTable[44 /* MinusMinusToken */] = true;
+        noRegexTable[20 /* CloseParenToken */] = true;
+        noRegexTable[22 /* CloseBracketToken */] = true;
+        noRegexTable[18 /* CloseBraceToken */] = true;
+        noRegexTable[101 /* TrueKeyword */] = true;
+        noRegexTable[86 /* FalseKeyword */] = true;
         // Just a stack of TemplateHeads and OpenCurlyBraces, used to perform rudimentary (inexact)
         // classification on template strings. Because of the context free nature of templates,
         // the only precise way to classify a template portion would be by propagating the stack across
@@ -62571,10 +74816,10 @@ var ts;
         /** Returns true if 'keyword2' can legally follow 'keyword1' in any language construct. */
         function canFollow(keyword1, keyword2) {
             if (ts.isAccessibilityModifier(keyword1)) {
-                if (keyword2 === 123 /* GetKeyword */ ||
-                    keyword2 === 131 /* SetKeyword */ ||
-                    keyword2 === 121 /* ConstructorKeyword */ ||
-                    keyword2 === 113 /* StaticKeyword */) {
+                if (keyword2 === 125 /* GetKeyword */ ||
+                    keyword2 === 135 /* SetKeyword */ ||
+                    keyword2 === 123 /* ConstructorKeyword */ ||
+                    keyword2 === 115 /* StaticKeyword */) {
                     // Allow things like "public get", "public constructor" and "public static".
                     // These are all legal.
                     return true;
@@ -62591,9 +74836,9 @@ var ts;
             var entries = [];
             var dense = classifications.spans;
             var lastEnd = 0;
-            for (var i = 0, n = dense.length; i < n; i += 3) {
+            for (var i = 0; i < dense.length; i += 3) {
                 var start = dense[i];
-                var length_5 = dense[i + 1];
+                var length_6 = dense[i + 1];
                 var type = dense[i + 2];
                 // Make a whitespace entry between the last item and this one.
                 if (lastEnd >= 0) {
@@ -62602,8 +74847,8 @@ var ts;
                         entries.push({ length: whitespaceLength_1, classification: ts.TokenClass.Whitespace });
                     }
                 }
-                entries.push({ length: length_5, classification: convertClassification(type) });
-                lastEnd = start + length_5;
+                entries.push({ length: length_6, classification: convertClassification(type) });
+                lastEnd = start + length_6;
             }
             var whitespaceLength = text.length - lastEnd;
             if (whitespaceLength > 0) {
@@ -62671,9 +74916,9 @@ var ts;
                 case 5 /* InTemplateMiddleOrTail */:
                     text = "}\n" + text;
                     offset = 2;
-                // fallthrough
+                // falls through
                 case 6 /* InTemplateSubstitutionPosition */:
-                    templateStack.push(12 /* TemplateHead */);
+                    templateStack.push(14 /* TemplateHead */);
                     break;
             }
             scanner.setText(text);
@@ -62704,71 +74949,71 @@ var ts;
             do {
                 token = scanner.scan();
                 if (!ts.isTrivia(token)) {
-                    if ((token === 39 /* SlashToken */ || token === 61 /* SlashEqualsToken */) && !noRegexTable[lastNonTriviaToken]) {
-                        if (scanner.reScanSlashToken() === 10 /* RegularExpressionLiteral */) {
-                            token = 10 /* RegularExpressionLiteral */;
+                    if ((token === 41 /* SlashToken */ || token === 63 /* SlashEqualsToken */) && !noRegexTable[lastNonTriviaToken]) {
+                        if (scanner.reScanSlashToken() === 12 /* RegularExpressionLiteral */) {
+                            token = 12 /* RegularExpressionLiteral */;
                         }
                     }
-                    else if (lastNonTriviaToken === 21 /* DotToken */ && isKeyword(token)) {
-                        token = 69 /* Identifier */;
+                    else if (lastNonTriviaToken === 23 /* DotToken */ && isKeyword(token)) {
+                        token = 71 /* Identifier */;
                     }
                     else if (isKeyword(lastNonTriviaToken) && isKeyword(token) && !canFollow(lastNonTriviaToken, token)) {
                         // We have two keywords in a row.  Only treat the second as a keyword if
                         // it's a sequence that could legally occur in the language.  Otherwise
                         // treat it as an identifier.  This way, if someone writes "private var"
                         // we recognize that 'var' is actually an identifier here.
-                        token = 69 /* Identifier */;
+                        token = 71 /* Identifier */;
                     }
-                    else if (lastNonTriviaToken === 69 /* Identifier */ &&
-                        token === 25 /* LessThanToken */) {
+                    else if (lastNonTriviaToken === 71 /* Identifier */ &&
+                        token === 27 /* LessThanToken */) {
                         // Could be the start of something generic.  Keep track of that by bumping
                         // up the current count of generic contexts we may be in.
                         angleBracketStack++;
                     }
-                    else if (token === 27 /* GreaterThanToken */ && angleBracketStack > 0) {
+                    else if (token === 29 /* GreaterThanToken */ && angleBracketStack > 0) {
                         // If we think we're currently in something generic, then mark that that
                         // generic entity is complete.
                         angleBracketStack--;
                     }
-                    else if (token === 117 /* AnyKeyword */ ||
-                        token === 132 /* StringKeyword */ ||
-                        token === 130 /* NumberKeyword */ ||
-                        token === 120 /* BooleanKeyword */ ||
-                        token === 133 /* SymbolKeyword */) {
+                    else if (token === 119 /* AnyKeyword */ ||
+                        token === 136 /* StringKeyword */ ||
+                        token === 133 /* NumberKeyword */ ||
+                        token === 122 /* BooleanKeyword */ ||
+                        token === 137 /* SymbolKeyword */) {
                         if (angleBracketStack > 0 && !syntacticClassifierAbsent) {
                             // If it looks like we're could be in something generic, don't classify this
                             // as a keyword.  We may just get overwritten by the syntactic classifier,
                             // causing a noisy experience for the user.
-                            token = 69 /* Identifier */;
+                            token = 71 /* Identifier */;
                         }
                     }
-                    else if (token === 12 /* TemplateHead */) {
+                    else if (token === 14 /* TemplateHead */) {
                         templateStack.push(token);
                     }
-                    else if (token === 15 /* OpenBraceToken */) {
+                    else if (token === 17 /* OpenBraceToken */) {
                         // If we don't have anything on the template stack,
                         // then we aren't trying to keep track of a previously scanned template head.
                         if (templateStack.length > 0) {
                             templateStack.push(token);
                         }
                     }
-                    else if (token === 16 /* CloseBraceToken */) {
+                    else if (token === 18 /* CloseBraceToken */) {
                         // If we don't have anything on the template stack,
                         // then we aren't trying to keep track of a previously scanned template head.
                         if (templateStack.length > 0) {
                             var lastTemplateStackToken = ts.lastOrUndefined(templateStack);
-                            if (lastTemplateStackToken === 12 /* TemplateHead */) {
+                            if (lastTemplateStackToken === 14 /* TemplateHead */) {
                                 token = scanner.reScanTemplateToken();
                                 // Only pop on a TemplateTail; a TemplateMiddle indicates there is more for us.
-                                if (token === 14 /* TemplateTail */) {
+                                if (token === 16 /* TemplateTail */) {
                                     templateStack.pop();
                                 }
                                 else {
-                                    ts.Debug.assert(token === 13 /* TemplateMiddle */, "Should have been a template middle. Was " + token);
+                                    ts.Debug.assert(token === 15 /* TemplateMiddle */, "Should have been a template middle. Was " + token);
                                 }
                             }
                             else {
-                                ts.Debug.assert(lastTemplateStackToken === 15 /* OpenBraceToken */, "Should have been an open brace. Was: " + token);
+                                ts.Debug.assert(lastTemplateStackToken === 17 /* OpenBraceToken */, "Should have been an open brace. Was: " + token);
                                 templateStack.pop();
                             }
                         }
@@ -62809,10 +75054,10 @@ var ts;
                     }
                     else if (ts.isTemplateLiteralKind(token)) {
                         if (scanner.isUnterminated()) {
-                            if (token === 14 /* TemplateTail */) {
+                            if (token === 16 /* TemplateTail */) {
                                 result.endOfLineState = 5 /* InTemplateMiddleOrTail */;
                             }
-                            else if (token === 11 /* NoSubstitutionTemplateLiteral */) {
+                            else if (token === 13 /* NoSubstitutionTemplateLiteral */) {
                                 result.endOfLineState = 4 /* InTemplateHeadOrNoSubstitutionTemplate */;
                             }
                             else {
@@ -62820,7 +75065,7 @@ var ts;
                             }
                         }
                     }
-                    else if (templateStack.length > 0 && ts.lastOrUndefined(templateStack) === 12 /* TemplateHead */) {
+                    else if (templateStack.length > 0 && ts.lastOrUndefined(templateStack) === 14 /* TemplateHead */) {
                         result.endOfLineState = 6 /* InTemplateSubstitutionPosition */;
                     }
                 }
@@ -62850,43 +75095,43 @@ var ts;
         }
         function isBinaryExpressionOperatorToken(token) {
             switch (token) {
-                case 37 /* AsteriskToken */:
-                case 39 /* SlashToken */:
-                case 40 /* PercentToken */:
-                case 35 /* PlusToken */:
-                case 36 /* MinusToken */:
-                case 43 /* LessThanLessThanToken */:
-                case 44 /* GreaterThanGreaterThanToken */:
-                case 45 /* GreaterThanGreaterThanGreaterThanToken */:
-                case 25 /* LessThanToken */:
-                case 27 /* GreaterThanToken */:
-                case 28 /* LessThanEqualsToken */:
-                case 29 /* GreaterThanEqualsToken */:
-                case 91 /* InstanceOfKeyword */:
-                case 90 /* InKeyword */:
-                case 116 /* AsKeyword */:
-                case 30 /* EqualsEqualsToken */:
-                case 31 /* ExclamationEqualsToken */:
-                case 32 /* EqualsEqualsEqualsToken */:
-                case 33 /* ExclamationEqualsEqualsToken */:
-                case 46 /* AmpersandToken */:
-                case 48 /* CaretToken */:
-                case 47 /* BarToken */:
-                case 51 /* AmpersandAmpersandToken */:
-                case 52 /* BarBarToken */:
-                case 67 /* BarEqualsToken */:
-                case 66 /* AmpersandEqualsToken */:
-                case 68 /* CaretEqualsToken */:
-                case 63 /* LessThanLessThanEqualsToken */:
-                case 64 /* GreaterThanGreaterThanEqualsToken */:
-                case 65 /* GreaterThanGreaterThanGreaterThanEqualsToken */:
-                case 57 /* PlusEqualsToken */:
-                case 58 /* MinusEqualsToken */:
-                case 59 /* AsteriskEqualsToken */:
-                case 61 /* SlashEqualsToken */:
-                case 62 /* PercentEqualsToken */:
-                case 56 /* EqualsToken */:
-                case 24 /* CommaToken */:
+                case 39 /* AsteriskToken */:
+                case 41 /* SlashToken */:
+                case 42 /* PercentToken */:
+                case 37 /* PlusToken */:
+                case 38 /* MinusToken */:
+                case 45 /* LessThanLessThanToken */:
+                case 46 /* GreaterThanGreaterThanToken */:
+                case 47 /* GreaterThanGreaterThanGreaterThanToken */:
+                case 27 /* LessThanToken */:
+                case 29 /* GreaterThanToken */:
+                case 30 /* LessThanEqualsToken */:
+                case 31 /* GreaterThanEqualsToken */:
+                case 93 /* InstanceOfKeyword */:
+                case 92 /* InKeyword */:
+                case 118 /* AsKeyword */:
+                case 32 /* EqualsEqualsToken */:
+                case 33 /* ExclamationEqualsToken */:
+                case 34 /* EqualsEqualsEqualsToken */:
+                case 35 /* ExclamationEqualsEqualsToken */:
+                case 48 /* AmpersandToken */:
+                case 50 /* CaretToken */:
+                case 49 /* BarToken */:
+                case 53 /* AmpersandAmpersandToken */:
+                case 54 /* BarBarToken */:
+                case 69 /* BarEqualsToken */:
+                case 68 /* AmpersandEqualsToken */:
+                case 70 /* CaretEqualsToken */:
+                case 65 /* LessThanLessThanEqualsToken */:
+                case 66 /* GreaterThanGreaterThanEqualsToken */:
+                case 67 /* GreaterThanGreaterThanGreaterThanEqualsToken */:
+                case 59 /* PlusEqualsToken */:
+                case 60 /* MinusEqualsToken */:
+                case 61 /* AsteriskEqualsToken */:
+                case 63 /* SlashEqualsToken */:
+                case 64 /* PercentEqualsToken */:
+                case 58 /* EqualsToken */:
+                case 26 /* CommaToken */:
                     return true;
                 default:
                     return false;
@@ -62894,19 +75139,19 @@ var ts;
         }
         function isPrefixUnaryExpressionOperatorToken(token) {
             switch (token) {
-                case 35 /* PlusToken */:
-                case 36 /* MinusToken */:
-                case 50 /* TildeToken */:
-                case 49 /* ExclamationToken */:
-                case 41 /* PlusPlusToken */:
-                case 42 /* MinusMinusToken */:
+                case 37 /* PlusToken */:
+                case 38 /* MinusToken */:
+                case 52 /* TildeToken */:
+                case 51 /* ExclamationToken */:
+                case 43 /* PlusPlusToken */:
+                case 44 /* MinusMinusToken */:
                     return true;
                 default:
                     return false;
             }
         }
         function isKeyword(token) {
-            return token >= 70 /* FirstKeyword */ && token <= 138 /* LastKeyword */;
+            return token >= 72 /* FirstKeyword */ && token <= 142 /* LastKeyword */;
         }
         function classFromKind(token) {
             if (isKeyword(token)) {
@@ -62915,7 +75160,7 @@ var ts;
             else if (isBinaryExpressionOperatorToken(token) || isPrefixUnaryExpressionOperatorToken(token)) {
                 return 5 /* operator */;
             }
-            else if (token >= 15 /* FirstPunctuation */ && token <= 68 /* LastPunctuation */) {
+            else if (token >= 17 /* FirstPunctuation */ && token <= 70 /* LastPunctuation */) {
                 return 10 /* punctuation */;
             }
             switch (token) {
@@ -62923,7 +75168,7 @@ var ts;
                     return 4 /* numericLiteral */;
                 case 9 /* StringLiteral */:
                     return 6 /* stringLiteral */;
-                case 10 /* RegularExpressionLiteral */:
+                case 12 /* RegularExpressionLiteral */:
                     return 7 /* regularExpressionLiteral */;
                 case 7 /* ConflictMarkerTrivia */:
                 case 3 /* MultiLineCommentTrivia */:
@@ -62932,7 +75177,7 @@ var ts;
                 case 5 /* WhitespaceTrivia */:
                 case 4 /* NewLineTrivia */:
                     return 8 /* whiteSpace */;
-                case 69 /* Identifier */:
+                case 71 /* Identifier */:
                 default:
                     if (ts.isTemplateLiteralKind(token)) {
                         return 6 /* stringLiteral */;
@@ -62963,10 +75208,10 @@ var ts;
         // That means we're calling back into the host around every 1.2k of the file we process.
         // Lib.d.ts has similar numbers.
         switch (kind) {
-            case 225 /* ModuleDeclaration */:
-            case 221 /* ClassDeclaration */:
-            case 222 /* InterfaceDeclaration */:
-            case 220 /* FunctionDeclaration */:
+            case 233 /* ModuleDeclaration */:
+            case 229 /* ClassDeclaration */:
+            case 230 /* InterfaceDeclaration */:
+            case 228 /* FunctionDeclaration */:
                 cancellationToken.throwIfCancellationRequested();
         }
     }
@@ -63017,7 +75262,7 @@ var ts;
              */
             function hasValueSideModule(symbol) {
                 return ts.forEach(symbol.declarations, function (declaration) {
-                    return declaration.kind === 225 /* ModuleDeclaration */ &&
+                    return declaration.kind === 233 /* ModuleDeclaration */ &&
                         ts.getModuleInstanceState(declaration) === 1 /* Instantiated */;
                 });
             }
@@ -63027,12 +75272,12 @@ var ts;
             if (node && ts.textSpanIntersectsWith(span, node.getFullStart(), node.getFullWidth())) {
                 var kind = node.kind;
                 checkForClassificationCancellation(cancellationToken, kind);
-                if (kind === 69 /* Identifier */ && !ts.nodeIsMissing(node)) {
+                if (kind === 71 /* Identifier */ && !ts.nodeIsMissing(node)) {
                     var identifier = node;
                     // Only bother calling into the typechecker if this is an identifier that
                     // could possibly resolve to a type name.  This makes classification run
                     // in a third of the time it would normally take.
-                    if (classifiableNames[identifier.text]) {
+                    if (classifiableNames.get(identifier.text)) {
                         var symbol = typeChecker.getSymbolAtLocation(node);
                         if (symbol) {
                             var type = classifySymbol(symbol, ts.getMeaningFromLocation(node));
@@ -63049,36 +75294,36 @@ var ts;
     ts.getEncodedSemanticClassifications = getEncodedSemanticClassifications;
     function getClassificationTypeName(type) {
         switch (type) {
-            case 1 /* comment */: return ts.ClassificationTypeNames.comment;
-            case 2 /* identifier */: return ts.ClassificationTypeNames.identifier;
-            case 3 /* keyword */: return ts.ClassificationTypeNames.keyword;
-            case 4 /* numericLiteral */: return ts.ClassificationTypeNames.numericLiteral;
-            case 5 /* operator */: return ts.ClassificationTypeNames.operator;
-            case 6 /* stringLiteral */: return ts.ClassificationTypeNames.stringLiteral;
-            case 8 /* whiteSpace */: return ts.ClassificationTypeNames.whiteSpace;
-            case 9 /* text */: return ts.ClassificationTypeNames.text;
-            case 10 /* punctuation */: return ts.ClassificationTypeNames.punctuation;
-            case 11 /* className */: return ts.ClassificationTypeNames.className;
-            case 12 /* enumName */: return ts.ClassificationTypeNames.enumName;
-            case 13 /* interfaceName */: return ts.ClassificationTypeNames.interfaceName;
-            case 14 /* moduleName */: return ts.ClassificationTypeNames.moduleName;
-            case 15 /* typeParameterName */: return ts.ClassificationTypeNames.typeParameterName;
-            case 16 /* typeAliasName */: return ts.ClassificationTypeNames.typeAliasName;
-            case 17 /* parameterName */: return ts.ClassificationTypeNames.parameterName;
-            case 18 /* docCommentTagName */: return ts.ClassificationTypeNames.docCommentTagName;
-            case 19 /* jsxOpenTagName */: return ts.ClassificationTypeNames.jsxOpenTagName;
-            case 20 /* jsxCloseTagName */: return ts.ClassificationTypeNames.jsxCloseTagName;
-            case 21 /* jsxSelfClosingTagName */: return ts.ClassificationTypeNames.jsxSelfClosingTagName;
-            case 22 /* jsxAttribute */: return ts.ClassificationTypeNames.jsxAttribute;
-            case 23 /* jsxText */: return ts.ClassificationTypeNames.jsxText;
-            case 24 /* jsxAttributeStringLiteralValue */: return ts.ClassificationTypeNames.jsxAttributeStringLiteralValue;
+            case 1 /* comment */: return "comment" /* comment */;
+            case 2 /* identifier */: return "identifier" /* identifier */;
+            case 3 /* keyword */: return "keyword" /* keyword */;
+            case 4 /* numericLiteral */: return "number" /* numericLiteral */;
+            case 5 /* operator */: return "operator" /* operator */;
+            case 6 /* stringLiteral */: return "string" /* stringLiteral */;
+            case 8 /* whiteSpace */: return "whitespace" /* whiteSpace */;
+            case 9 /* text */: return "text" /* text */;
+            case 10 /* punctuation */: return "punctuation" /* punctuation */;
+            case 11 /* className */: return "class name" /* className */;
+            case 12 /* enumName */: return "enum name" /* enumName */;
+            case 13 /* interfaceName */: return "interface name" /* interfaceName */;
+            case 14 /* moduleName */: return "module name" /* moduleName */;
+            case 15 /* typeParameterName */: return "type parameter name" /* typeParameterName */;
+            case 16 /* typeAliasName */: return "type alias name" /* typeAliasName */;
+            case 17 /* parameterName */: return "parameter name" /* parameterName */;
+            case 18 /* docCommentTagName */: return "doc comment tag name" /* docCommentTagName */;
+            case 19 /* jsxOpenTagName */: return "jsx open tag name" /* jsxOpenTagName */;
+            case 20 /* jsxCloseTagName */: return "jsx close tag name" /* jsxCloseTagName */;
+            case 21 /* jsxSelfClosingTagName */: return "jsx self closing tag name" /* jsxSelfClosingTagName */;
+            case 22 /* jsxAttribute */: return "jsx attribute" /* jsxAttribute */;
+            case 23 /* jsxText */: return "jsx text" /* jsxText */;
+            case 24 /* jsxAttributeStringLiteralValue */: return "jsx attribute string literal value" /* jsxAttributeStringLiteralValue */;
         }
     }
     function convertClassifications(classifications) {
         ts.Debug.assert(classifications.spans.length % 3 === 0);
         var dense = classifications.spans;
         var result = [];
-        for (var i = 0, n = dense.length; i < n; i += 3) {
+        for (var i = 0; i < dense.length; i += 3) {
             result.push({
                 textSpan: ts.createTextSpan(dense[i], dense[i + 1]),
                 classificationType: getClassificationTypeName(dense[i + 2])
@@ -63096,8 +75341,8 @@ var ts;
         var spanStart = span.start;
         var spanLength = span.length;
         // Make a scanner we can get trivia from.
-        var triviaScanner = ts.createScanner(2 /* Latest */, /*skipTrivia*/ false, sourceFile.languageVariant, sourceFile.text);
-        var mergeConflictScanner = ts.createScanner(2 /* Latest */, /*skipTrivia*/ false, sourceFile.languageVariant, sourceFile.text);
+        var triviaScanner = ts.createScanner(5 /* Latest */, /*skipTrivia*/ false, sourceFile.languageVariant, sourceFile.text);
+        var mergeConflictScanner = ts.createScanner(5 /* Latest */, /*skipTrivia*/ false, sourceFile.languageVariant, sourceFile.text);
         var result = [];
         processElement(sourceFile);
         return { spans: result, endOfLineState: 0 /* None */ };
@@ -63143,9 +75388,9 @@ var ts;
                         pushClassification(start, width, 1 /* comment */);
                         continue;
                     }
-                    // for the ======== add a comment for the first line, and then lex all
-                    // subsequent lines up until the end of the conflict marker.
-                    ts.Debug.assert(ch === 61 /* equals */);
+                    // for the ||||||| and ======== markers, add a comment for the first line,
+                    // and then lex all subsequent lines up until the end of the conflict marker.
+                    ts.Debug.assert(ch === 124 /* bar */ || ch === 61 /* equals */);
                     classifyDisabledMergeCode(text, start, end);
                 }
             }
@@ -63177,20 +75422,20 @@ var ts;
                     if (tag.pos !== pos) {
                         pushCommentRange(pos, tag.pos - pos);
                     }
-                    pushClassification(tag.atToken.pos, tag.atToken.end - tag.atToken.pos, 10 /* punctuation */);
-                    pushClassification(tag.tagName.pos, tag.tagName.end - tag.tagName.pos, 18 /* docCommentTagName */);
+                    pushClassification(tag.atToken.pos, tag.atToken.end - tag.atToken.pos, 10 /* punctuation */); // "@"
+                    pushClassification(tag.tagName.pos, tag.tagName.end - tag.tagName.pos, 18 /* docCommentTagName */); // e.g. "param"
                     pos = tag.tagName.end;
                     switch (tag.kind) {
-                        case 275 /* JSDocParameterTag */:
+                        case 287 /* JSDocParameterTag */:
                             processJSDocParameterTag(tag);
                             break;
-                        case 278 /* JSDocTemplateTag */:
+                        case 290 /* JSDocTemplateTag */:
                             processJSDocTemplateTag(tag);
                             break;
-                        case 277 /* JSDocTypeTag */:
+                        case 289 /* JSDocTypeTag */:
                             processElement(tag.typeExpression);
                             break;
-                        case 276 /* JSDocReturnTag */:
+                        case 288 /* JSDocReturnTag */:
                             processElement(tag.typeExpression);
                             break;
                     }
@@ -63226,8 +75471,8 @@ var ts;
             }
         }
         function classifyDisabledMergeCode(text, start, end) {
-            // Classify the line that the ======= marker is on as a comment.  Then just lex
-            // all further tokens and add them to the result.
+            // Classify the line that the ||||||| or ======= marker is on as a comment.
+            // Then just lex all further tokens and add them to the result.
             var i;
             for (i = start; i < end; i++) {
                 if (ts.isLineBreak(text.charCodeAt(i))) {
@@ -63254,17 +75499,17 @@ var ts;
          * False will mean that node is not classified and traverse routine should recurse into node contents.
          */
         function tryClassifyNode(node) {
-            if (ts.isJSDocTag(node)) {
+            if (ts.isJSDoc(node)) {
                 return true;
             }
             if (ts.nodeIsMissing(node)) {
                 return true;
             }
             var classifiedElementName = tryClassifyJsxElementName(node);
-            if (!ts.isToken(node) && node.kind !== 244 /* JsxText */ && classifiedElementName === undefined) {
+            if (!ts.isToken(node) && node.kind !== 10 /* JsxText */ && classifiedElementName === undefined) {
                 return false;
             }
-            var tokenStart = node.kind === 244 /* JsxText */ ? node.pos : classifyLeadingTriviaAndGetTokenStart(node);
+            var tokenStart = node.kind === 10 /* JsxText */ ? node.pos : classifyLeadingTriviaAndGetTokenStart(node);
             var tokenWidth = node.end - tokenStart;
             ts.Debug.assert(tokenWidth >= 0);
             if (tokenWidth > 0) {
@@ -63277,22 +75522,22 @@ var ts;
         }
         function tryClassifyJsxElementName(token) {
             switch (token.parent && token.parent.kind) {
-                case 243 /* JsxOpeningElement */:
+                case 251 /* JsxOpeningElement */:
                     if (token.parent.tagName === token) {
                         return 19 /* jsxOpenTagName */;
                     }
                     break;
-                case 245 /* JsxClosingElement */:
+                case 252 /* JsxClosingElement */:
                     if (token.parent.tagName === token) {
                         return 20 /* jsxCloseTagName */;
                     }
                     break;
-                case 242 /* JsxSelfClosingElement */:
+                case 250 /* JsxSelfClosingElement */:
                     if (token.parent.tagName === token) {
                         return 21 /* jsxSelfClosingTagName */;
                     }
                     break;
-                case 246 /* JsxAttribute */:
+                case 253 /* JsxAttribute */:
                     if (token.parent.name === token) {
                         return 22 /* jsxAttribute */;
                     }
@@ -63309,7 +75554,7 @@ var ts;
             }
             // Special case < and >  If they appear in a generic context they are punctuation,
             // not operators.
-            if (tokenKind === 25 /* LessThanToken */ || tokenKind === 27 /* GreaterThanToken */) {
+            if (tokenKind === 27 /* LessThanToken */ || tokenKind === 29 /* GreaterThanToken */) {
                 // If the node owning the token has a type argument list or type parameter list, then
                 // we can effectively assume that a '<' and '>' belong to those lists.
                 if (token && ts.getTypeArgumentOrTypeParameterList(token.parent)) {
@@ -63318,19 +75563,19 @@ var ts;
             }
             if (ts.isPunctuation(tokenKind)) {
                 if (token) {
-                    if (tokenKind === 56 /* EqualsToken */) {
+                    if (tokenKind === 58 /* EqualsToken */) {
                         // the '=' in a variable declaration is special cased here.
-                        if (token.parent.kind === 218 /* VariableDeclaration */ ||
-                            token.parent.kind === 145 /* PropertyDeclaration */ ||
-                            token.parent.kind === 142 /* Parameter */ ||
-                            token.parent.kind === 246 /* JsxAttribute */) {
+                        if (token.parent.kind === 226 /* VariableDeclaration */ ||
+                            token.parent.kind === 149 /* PropertyDeclaration */ ||
+                            token.parent.kind === 146 /* Parameter */ ||
+                            token.parent.kind === 253 /* JsxAttribute */) {
                             return 5 /* operator */;
                         }
                     }
-                    if (token.parent.kind === 187 /* BinaryExpression */ ||
-                        token.parent.kind === 185 /* PrefixUnaryExpression */ ||
-                        token.parent.kind === 186 /* PostfixUnaryExpression */ ||
-                        token.parent.kind === 188 /* ConditionalExpression */) {
+                    if (token.parent.kind === 194 /* BinaryExpression */ ||
+                        token.parent.kind === 192 /* PrefixUnaryExpression */ ||
+                        token.parent.kind === 193 /* PostfixUnaryExpression */ ||
+                        token.parent.kind === 195 /* ConditionalExpression */) {
                         return 5 /* operator */;
                     }
                 }
@@ -63340,9 +75585,9 @@ var ts;
                 return 4 /* numericLiteral */;
             }
             else if (tokenKind === 9 /* StringLiteral */) {
-                return token.parent.kind === 246 /* JsxAttribute */ ? 24 /* jsxAttributeStringLiteralValue */ : 6 /* stringLiteral */;
+                return token.parent.kind === 253 /* JsxAttribute */ ? 24 /* jsxAttributeStringLiteralValue */ : 6 /* stringLiteral */;
             }
-            else if (tokenKind === 10 /* RegularExpressionLiteral */) {
+            else if (tokenKind === 12 /* RegularExpressionLiteral */) {
                 // TODO: we should get another classification type for these literals.
                 return 6 /* stringLiteral */;
             }
@@ -63350,41 +75595,40 @@ var ts;
                 // TODO (drosen): we should *also* get another classification type for these literals.
                 return 6 /* stringLiteral */;
             }
-            else if (tokenKind === 244 /* JsxText */) {
+            else if (tokenKind === 10 /* JsxText */) {
                 return 23 /* jsxText */;
             }
-            else if (tokenKind === 69 /* Identifier */) {
+            else if (tokenKind === 71 /* Identifier */) {
                 if (token) {
                     switch (token.parent.kind) {
-                        case 221 /* ClassDeclaration */:
+                        case 229 /* ClassDeclaration */:
                             if (token.parent.name === token) {
                                 return 11 /* className */;
                             }
                             return;
-                        case 141 /* TypeParameter */:
+                        case 145 /* TypeParameter */:
                             if (token.parent.name === token) {
                                 return 15 /* typeParameterName */;
                             }
                             return;
-                        case 222 /* InterfaceDeclaration */:
+                        case 230 /* InterfaceDeclaration */:
                             if (token.parent.name === token) {
                                 return 13 /* interfaceName */;
                             }
                             return;
-                        case 224 /* EnumDeclaration */:
+                        case 232 /* EnumDeclaration */:
                             if (token.parent.name === token) {
                                 return 12 /* enumName */;
                             }
                             return;
-                        case 225 /* ModuleDeclaration */:
+                        case 233 /* ModuleDeclaration */:
                             if (token.parent.name === token) {
                                 return 14 /* moduleName */;
                             }
                             return;
-                        case 142 /* Parameter */:
+                        case 146 /* Parameter */:
                             if (token.parent.name === token) {
-                                var isThis_1 = token.kind === 69 /* Identifier */ && token.originalKeywordKind === 97 /* ThisKeyword */;
-                                return isThis_1 ? 3 /* keyword */ : 17 /* parameterName */;
+                                return ts.isThisIdentifier(token) ? 3 /* keyword */ : 17 /* parameterName */;
                             }
                             return;
                     }
@@ -63399,9 +75643,8 @@ var ts;
             // Ignore nodes that don't intersect the original span to classify.
             if (ts.decodedTextSpanIntersectsWith(spanStart, spanLength, element.pos, element.getFullWidth())) {
                 checkForClassificationCancellation(cancellationToken, element.kind);
-                var children = element.getChildren(sourceFile);
-                for (var i = 0, n = children.length; i < n; i++) {
-                    var child = children[i];
+                for (var _i = 0, _a = element.getChildren(sourceFile); _i < _a.length; _i++) {
+                    var child = _a[_i];
                     if (!tryClassifyNode(child)) {
                         // Recurse into our child nodes.
                         processElement(child);
@@ -63417,258 +75660,35 @@ var ts;
 (function (ts) {
     var Completions;
     (function (Completions) {
-        function getCompletionsAtPosition(host, typeChecker, log, compilerOptions, sourceFile, position) {
-            if (ts.isInReferenceComment(sourceFile, position)) {
-                return getTripleSlashReferenceCompletion(sourceFile, position);
-            }
-            if (ts.isInString(sourceFile, position)) {
-                return getStringLiteralCompletionEntries(sourceFile, position);
-            }
-            var completionData = getCompletionData(typeChecker, log, sourceFile, position);
-            if (!completionData) {
-                return undefined;
-            }
-            var symbols = completionData.symbols, isMemberCompletion = completionData.isMemberCompletion, isNewIdentifierLocation = completionData.isNewIdentifierLocation, location = completionData.location, isJsDocTagName = completionData.isJsDocTagName;
-            if (isJsDocTagName) {
-                // If the current position is a jsDoc tag name, only tag names should be provided for completion
-                return { isMemberCompletion: false, isNewIdentifierLocation: false, entries: ts.JsDoc.getAllJsDocCompletionEntries() };
-            }
-            var entries = [];
-            if (ts.isSourceFileJavaScript(sourceFile)) {
-                var uniqueNames = getCompletionEntriesFromSymbols(symbols, entries, location, /*performCharacterChecks*/ false);
-                ts.addRange(entries, getJavaScriptCompletionEntries(sourceFile, location.pos, uniqueNames));
-            }
-            else {
-                if (!symbols || symbols.length === 0) {
-                    if (sourceFile.languageVariant === 1 /* JSX */ &&
-                        location.parent && location.parent.kind === 245 /* JsxClosingElement */) {
-                        // In the TypeScript JSX element, if such element is not defined. When users query for completion at closing tag,
-                        // instead of simply giving unknown value, the completion will return the tag-name of an associated opening-element.
-                        // For example:
-                        //     var x = <div> </ /*1*/>  completion list at "1" will contain "div" with type any
-                        var tagName = location.parent.parent.openingElement.tagName;
-                        entries.push({
-                            name: tagName.text,
-                            kind: undefined,
-                            kindModifiers: undefined,
-                            sortText: "0",
-                        });
-                    }
-                    else {
-                        return undefined;
-                    }
-                }
-                getCompletionEntriesFromSymbols(symbols, entries, location, /*performCharacterChecks*/ true);
-            }
-            // Add keywords if this is not a member completion list
-            if (!isMemberCompletion && !isJsDocTagName) {
-                ts.addRange(entries, keywordCompletions);
-            }
-            return { isMemberCompletion: isMemberCompletion, isNewIdentifierLocation: isNewIdentifierLocation, entries: entries };
-            function getJavaScriptCompletionEntries(sourceFile, position, uniqueNames) {
-                var entries = [];
-                var nameTable = ts.getNameTable(sourceFile);
-                for (var name_49 in nameTable) {
-                    // Skip identifiers produced only from the current location
-                    if (nameTable[name_49] === position) {
-                        continue;
-                    }
-                    if (!uniqueNames[name_49]) {
-                        uniqueNames[name_49] = name_49;
-                        var displayName = getCompletionEntryDisplayName(ts.unescapeIdentifier(name_49), compilerOptions.target, /*performCharacterChecks*/ true);
-                        if (displayName) {
-                            var entry = {
-                                name: displayName,
-                                kind: ts.ScriptElementKind.warning,
-                                kindModifiers: "",
-                                sortText: "1"
-                            };
-                            entries.push(entry);
-                        }
-                    }
-                }
-                return entries;
-            }
-            function createCompletionEntry(symbol, location, performCharacterChecks) {
-                // Try to get a valid display name for this symbol, if we could not find one, then ignore it.
-                // We would like to only show things that can be added after a dot, so for instance numeric properties can
-                // not be accessed with a dot (a.1 <- invalid)
-                var displayName = getCompletionEntryDisplayNameForSymbol(typeChecker, symbol, compilerOptions.target, performCharacterChecks, location);
-                if (!displayName) {
-                    return undefined;
-                }
-                // TODO(drosen): Right now we just permit *all* semantic meanings when calling
-                // 'getSymbolKind' which is permissible given that it is backwards compatible; but
-                // really we should consider passing the meaning for the node so that we don't report
-                // that a suggestion for a value is an interface.  We COULD also just do what
-                // 'getSymbolModifiers' does, which is to use the first declaration.
-                // Use a 'sortText' of 0' so that all symbol completion entries come before any other
-                // entries (like JavaScript identifier entries).
-                return {
-                    name: displayName,
-                    kind: ts.SymbolDisplay.getSymbolKind(typeChecker, symbol, location),
-                    kindModifiers: ts.SymbolDisplay.getSymbolModifiers(symbol),
-                    sortText: "0",
-                };
-            }
-            function getCompletionEntriesFromSymbols(symbols, entries, location, performCharacterChecks) {
-                var start = ts.timestamp();
-                var uniqueNames = ts.createMap();
-                if (symbols) {
-                    for (var _i = 0, symbols_4 = symbols; _i < symbols_4.length; _i++) {
-                        var symbol = symbols_4[_i];
-                        var entry = createCompletionEntry(symbol, location, performCharacterChecks);
-                        if (entry) {
-                            var id = ts.escapeIdentifier(entry.name);
-                            if (!uniqueNames[id]) {
-                                entries.push(entry);
-                                uniqueNames[id] = id;
-                            }
-                        }
-                    }
-                }
-                log("getCompletionsAtPosition: getCompletionEntriesFromSymbols: " + (ts.timestamp() - start));
-                return uniqueNames;
-            }
-            function getStringLiteralCompletionEntries(sourceFile, position) {
-                var node = ts.findPrecedingToken(position, sourceFile);
-                if (!node || node.kind !== 9 /* StringLiteral */) {
-                    return undefined;
-                }
-                if (node.parent.kind === 253 /* PropertyAssignment */ && node.parent.parent.kind === 171 /* ObjectLiteralExpression */) {
-                    // Get quoted name of properties of the object literal expression
-                    // i.e. interface ConfigFiles {
-                    //          'jspm:dev': string
-                    //      }
-                    //      let files: ConfigFiles = {
-                    //          '/*completion position*/'
-                    //      }
-                    //
-                    //      function foo(c: ConfigFiles) {}
-                    //      foo({
-                    //          '/*completion position*/'
-                    //      });
-                    return getStringLiteralCompletionEntriesFromPropertyAssignment(node.parent);
-                }
-                else if (ts.isElementAccessExpression(node.parent) && node.parent.argumentExpression === node) {
-                    // Get all names of properties on the expression
-                    // i.e. interface A {
-                    //      'prop1': string
-                    // }
-                    // let a: A;
-                    // a['/*completion position*/']
-                    return getStringLiteralCompletionEntriesFromElementAccess(node.parent);
-                }
-                else if (node.parent.kind === 230 /* ImportDeclaration */ || ts.isExpressionOfExternalModuleImportEqualsDeclaration(node) || ts.isRequireCall(node.parent, false)) {
-                    // Get all known external module names or complete a path to a module
-                    // i.e. import * as ns from "/*completion position*/";
-                    //      import x = require("/*completion position*/");
-                    //      var y = require("/*completion position*/");
-                    return getStringLiteralCompletionEntriesFromModuleNames(node);
-                }
-                else {
-                    var argumentInfo = ts.SignatureHelp.getContainingArgumentInfo(node, position, sourceFile);
-                    if (argumentInfo) {
-                        // Get string literal completions from specialized signatures of the target
-                        // i.e. declare function f(a: 'A');
-                        // f("/*completion position*/")
-                        return getStringLiteralCompletionEntriesFromCallExpression(argumentInfo, node);
-                    }
-                    // Get completion for string literal from string literal type
-                    // i.e. var x: "hi" | "hello" = "/*completion position*/"
-                    return getStringLiteralCompletionEntriesFromContextualType(node);
-                }
-            }
-            function getStringLiteralCompletionEntriesFromPropertyAssignment(element) {
-                var type = typeChecker.getContextualType(element.parent);
-                var entries = [];
-                if (type) {
-                    getCompletionEntriesFromSymbols(type.getApparentProperties(), entries, element, /*performCharacterChecks*/ false);
-                    if (entries.length) {
-                        return { isMemberCompletion: true, isNewIdentifierLocation: true, entries: entries };
-                    }
-                }
-            }
-            function getStringLiteralCompletionEntriesFromCallExpression(argumentInfo, location) {
-                var candidates = [];
-                var entries = [];
-                typeChecker.getResolvedSignature(argumentInfo.invocation, candidates);
-                for (var _i = 0, candidates_3 = candidates; _i < candidates_3.length; _i++) {
-                    var candidate = candidates_3[_i];
-                    if (candidate.parameters.length > argumentInfo.argumentIndex) {
-                        var parameter = candidate.parameters[argumentInfo.argumentIndex];
-                        addStringLiteralCompletionsFromType(typeChecker.getTypeAtLocation(parameter.valueDeclaration), entries);
-                    }
-                }
-                if (entries.length) {
-                    return { isMemberCompletion: false, isNewIdentifierLocation: true, entries: entries };
-                }
-                return undefined;
-            }
-            function getStringLiteralCompletionEntriesFromElementAccess(node) {
-                var type = typeChecker.getTypeAtLocation(node.expression);
-                var entries = [];
-                if (type) {
-                    getCompletionEntriesFromSymbols(type.getApparentProperties(), entries, node, /*performCharacterChecks*/ false);
-                    if (entries.length) {
-                        return { isMemberCompletion: true, isNewIdentifierLocation: true, entries: entries };
-                    }
-                }
-                return undefined;
-            }
-            function getStringLiteralCompletionEntriesFromContextualType(node) {
-                var type = typeChecker.getContextualType(node);
-                if (type) {
-                    var entries_2 = [];
-                    addStringLiteralCompletionsFromType(type, entries_2);
-                    if (entries_2.length) {
-                        return { isMemberCompletion: false, isNewIdentifierLocation: false, entries: entries_2 };
-                    }
-                }
-                return undefined;
-            }
-            function addStringLiteralCompletionsFromType(type, result) {
-                if (!type) {
-                    return;
-                }
-                if (type.flags & 524288 /* Union */) {
-                    ts.forEach(type.types, function (t) { return addStringLiteralCompletionsFromType(t, result); });
-                }
-                else {
-                    if (type.flags & 32 /* StringLiteral */) {
-                        result.push({
-                            name: type.text,
-                            kindModifiers: ts.ScriptElementKindModifier.none,
-                            kind: ts.ScriptElementKind.variableElement,
-                            sortText: "0"
-                        });
-                    }
-                }
-            }
-            function getStringLiteralCompletionEntriesFromModuleNames(node) {
+        var PathCompletions;
+        (function (PathCompletions) {
+            function getStringLiteralCompletionEntriesFromModuleNames(node, compilerOptions, host, typeChecker) {
                 var literalValue = ts.normalizeSlashes(node.text);
                 var scriptPath = node.getSourceFile().path;
                 var scriptDirectory = ts.getDirectoryPath(scriptPath);
                 var span = getDirectoryFragmentTextSpan(node.text, node.getStart() + 1);
                 var entries;
                 if (isPathRelativeToScript(literalValue) || ts.isRootedDiskPath(literalValue)) {
+                    var extensions = ts.getSupportedExtensions(compilerOptions);
                     if (compilerOptions.rootDirs) {
-                        entries = getCompletionEntriesForDirectoryFragmentWithRootDirs(compilerOptions.rootDirs, literalValue, scriptDirectory, ts.getSupportedExtensions(compilerOptions), /*includeExtensions*/ false, span, scriptPath);
+                        entries = getCompletionEntriesForDirectoryFragmentWithRootDirs(compilerOptions.rootDirs, literalValue, scriptDirectory, extensions, /*includeExtensions*/ false, span, compilerOptions, host, scriptPath);
                     }
                     else {
-                        entries = getCompletionEntriesForDirectoryFragment(literalValue, scriptDirectory, ts.getSupportedExtensions(compilerOptions), /*includeExtensions*/ false, span, scriptPath);
+                        entries = getCompletionEntriesForDirectoryFragment(literalValue, scriptDirectory, extensions, /*includeExtensions*/ false, span, host, scriptPath);
                     }
                 }
                 else {
                     // Check for node modules
-                    entries = getCompletionEntriesForNonRelativeModules(literalValue, scriptDirectory, span);
+                    entries = getCompletionEntriesForNonRelativeModules(literalValue, scriptDirectory, span, compilerOptions, host, typeChecker);
                 }
                 return {
+                    isGlobalCompletion: false,
                     isMemberCompletion: false,
                     isNewIdentifierLocation: true,
                     entries: entries
                 };
             }
+            PathCompletions.getStringLiteralCompletionEntriesFromModuleNames = getStringLiteralCompletionEntriesFromModuleNames;
             /**
              * Takes a script path and returns paths for all potential folders that could be merged with its
              * containing folder via the "rootDirs" compiler option
@@ -63688,26 +75708,35 @@ var ts;
                 // Now find a path for each potential directory that is to be merged with the one containing the script
                 return ts.deduplicate(ts.map(rootDirs, function (rootDirectory) { return ts.combinePaths(rootDirectory, relativeDirectory); }));
             }
-            function getCompletionEntriesForDirectoryFragmentWithRootDirs(rootDirs, fragment, scriptPath, extensions, includeExtensions, span, exclude) {
+            function getCompletionEntriesForDirectoryFragmentWithRootDirs(rootDirs, fragment, scriptPath, extensions, includeExtensions, span, compilerOptions, host, exclude) {
                 var basePath = compilerOptions.project || host.getCurrentDirectory();
                 var ignoreCase = !(host.useCaseSensitiveFileNames && host.useCaseSensitiveFileNames());
                 var baseDirectories = getBaseDirectoriesFromRootDirs(rootDirs, basePath, scriptPath, ignoreCase);
                 var result = [];
                 for (var _i = 0, baseDirectories_1 = baseDirectories; _i < baseDirectories_1.length; _i++) {
                     var baseDirectory = baseDirectories_1[_i];
-                    getCompletionEntriesForDirectoryFragment(fragment, baseDirectory, extensions, includeExtensions, span, exclude, result);
+                    getCompletionEntriesForDirectoryFragment(fragment, baseDirectory, extensions, includeExtensions, span, host, exclude, result);
                 }
                 return result;
             }
-            function getCompletionEntriesForDirectoryFragment(fragment, scriptPath, extensions, includeExtensions, span, exclude, result) {
+            /**
+             * Given a path ending at a directory, gets the completions for the path, and filters for those entries containing the basename.
+             */
+            function getCompletionEntriesForDirectoryFragment(fragment, scriptPath, extensions, includeExtensions, span, host, exclude, result) {
                 if (result === void 0) { result = []; }
-                fragment = ts.getDirectoryPath(fragment);
-                if (!fragment) {
-                    fragment = "./";
+                if (fragment === undefined) {
+                    fragment = "";
                 }
-                else {
-                    fragment = ts.ensureTrailingDirectorySeparator(fragment);
+                fragment = ts.normalizeSlashes(fragment);
+                /**
+                 * Remove the basename from the path. Note that we don't use the basename to filter completions;
+                 * the client is responsible for refining completions.
+                 */
+                fragment = ts.getDirectoryPath(fragment);
+                if (fragment === "") {
+                    fragment = "." + ts.directorySeparator;
                 }
+                fragment = ts.ensureTrailingDirectorySeparator(fragment);
                 var absolutePath = normalizeAndPreserveTrailingSlash(ts.isRootedDiskPath(fragment) ? fragment : ts.combinePaths(scriptPath, fragment));
                 var baseDirectory = ts.getDirectoryPath(absolutePath);
                 var ignoreCase = !(host.useCaseSensitiveFileNames && host.useCaseSensitiveFileNames());
@@ -63715,6 +75744,12 @@ var ts;
                     // Enumerate the available files if possible
                     var files = tryReadDirectory(host, baseDirectory, extensions, /*exclude*/ undefined, /*include*/ ["./*"]);
                     if (files) {
+                        /**
+                         * Multiple file entries might map to the same truncated name once we remove extensions
+                         * (happens iff includeExtensions === false)so we use a set-like data structure. Eg:
+                         *
+                         * both foo.ts and foo.tsx become foo
+                         */
                         var foundFiles = ts.createMap();
                         for (var _i = 0, files_4 = files; _i < files_4.length; _i++) {
                             var filePath = files_4[_i];
@@ -63723,13 +75758,13 @@ var ts;
                                 continue;
                             }
                             var foundFileName = includeExtensions ? ts.getBaseFileName(filePath) : ts.removeFileExtension(ts.getBaseFileName(filePath));
-                            if (!foundFiles[foundFileName]) {
-                                foundFiles[foundFileName] = true;
+                            if (!foundFiles.get(foundFileName)) {
+                                foundFiles.set(foundFileName, true);
                             }
                         }
-                        for (var foundFile in foundFiles) {
-                            result.push(createCompletionEntryForModule(foundFile, ts.ScriptElementKind.scriptElement, span));
-                        }
+                        ts.forEachKey(foundFiles, function (foundFile) {
+                            result.push(createCompletionEntryForModule(foundFile, "script" /* scriptElement */, span));
+                        });
                     }
                     // If possible, get folder completion as well
                     var directories = tryGetDirectories(host, baseDirectory);
@@ -63737,7 +75772,7 @@ var ts;
                         for (var _a = 0, directories_2 = directories; _a < directories_2.length; _a++) {
                             var directory = directories_2[_a];
                             var directoryName = ts.getBaseFileName(ts.normalizePath(directory));
-                            result.push(createCompletionEntryForModule(directoryName, ts.ScriptElementKind.directory, span));
+                            result.push(createCompletionEntryForModule(directoryName, "directory" /* directory */, span));
                         }
                     }
                 }
@@ -63750,14 +75785,14 @@ var ts;
              *      Modules from node_modules (i.e. those listed in package.json)
              *          This includes all files that are found in node_modules/moduleName/ with acceptable file extensions
              */
-            function getCompletionEntriesForNonRelativeModules(fragment, scriptPath, span) {
+            function getCompletionEntriesForNonRelativeModules(fragment, scriptPath, span, compilerOptions, host, typeChecker) {
                 var baseUrl = compilerOptions.baseUrl, paths = compilerOptions.paths;
                 var result;
                 if (baseUrl) {
                     var fileExtensions = ts.getSupportedExtensions(compilerOptions);
                     var projectDir = compilerOptions.project || host.getCurrentDirectory();
                     var absolute = ts.isRootedDiskPath(baseUrl) ? baseUrl : ts.combinePaths(projectDir, baseUrl);
-                    result = getCompletionEntriesForDirectoryFragment(fragment, ts.normalizePath(absolute), fileExtensions, /*includeExtensions*/ false, span);
+                    result = getCompletionEntriesForDirectoryFragment(fragment, ts.normalizePath(absolute), fileExtensions, /*includeExtensions*/ false, span, host);
                     if (paths) {
                         for (var path in paths) {
                             if (paths.hasOwnProperty(path)) {
@@ -63765,9 +75800,9 @@ var ts;
                                     if (paths[path]) {
                                         for (var _i = 0, _a = paths[path]; _i < _a.length; _i++) {
                                             var pattern = _a[_i];
-                                            for (var _b = 0, _c = getModulesForPathsPattern(fragment, baseUrl, pattern, fileExtensions); _b < _c.length; _b++) {
+                                            for (var _b = 0, _c = getModulesForPathsPattern(fragment, baseUrl, pattern, fileExtensions, host); _b < _c.length; _b++) {
                                                 var match = _c[_b];
-                                                result.push(createCompletionEntryForModule(match, ts.ScriptElementKind.externalModuleName, span));
+                                                result.push(createCompletionEntryForModule(match, "external module name" /* externalModuleName */, span));
                                             }
                                         }
                                     }
@@ -63775,7 +75810,7 @@ var ts;
                                 else if (ts.startsWith(path, fragment)) {
                                     var entry = paths[path] && paths[path].length === 1 && paths[path][0];
                                     if (entry) {
-                                        result.push(createCompletionEntryForModule(path, ts.ScriptElementKind.externalModuleName, span));
+                                        result.push(createCompletionEntryForModule(path, "external module name" /* externalModuleName */, span));
                                     }
                                 }
                             }
@@ -63786,13 +75821,13 @@ var ts;
                     result = [];
                 }
                 getCompletionEntriesFromTypings(host, compilerOptions, scriptPath, span, result);
-                for (var _d = 0, _e = enumeratePotentialNonRelativeModules(fragment, scriptPath, compilerOptions); _d < _e.length; _d++) {
+                for (var _d = 0, _e = enumeratePotentialNonRelativeModules(fragment, scriptPath, compilerOptions, typeChecker, host); _d < _e.length; _d++) {
                     var moduleName = _e[_d];
-                    result.push(createCompletionEntryForModule(moduleName, ts.ScriptElementKind.externalModuleName, span));
+                    result.push(createCompletionEntryForModule(moduleName, "external module name" /* externalModuleName */, span));
                 }
                 return result;
             }
-            function getModulesForPathsPattern(fragment, baseUrl, pattern, fileExtensions) {
+            function getModulesForPathsPattern(fragment, baseUrl, pattern, fileExtensions, host) {
                 if (host.readDirectory) {
                     var parsed = ts.hasZeroOrOneAsteriskCharacter(pattern) ? ts.tryParsePattern(pattern) : undefined;
                     if (parsed) {
@@ -63811,7 +75846,7 @@ var ts;
                         // that encodes the suffix, but we would have to escape the character "?" which readDirectory
                         // doesn't support. For now, this is safer but slower
                         var includeGlob = normalizedSuffix ? "**/*" : "./*";
-                        var matches = tryReadDirectory(host, baseDirectory, fileExtensions, undefined, [includeGlob]);
+                        var matches = tryReadDirectory(host, baseDirectory, fileExtensions, /*exclude*/ undefined, [includeGlob]);
                         if (matches) {
                             var result = [];
                             // Trim away prefix and suffix
@@ -63822,8 +75857,8 @@ var ts;
                                     continue;
                                 }
                                 var start = completePrefix.length;
-                                var length_6 = normalizedMatch.length - start - normalizedSuffix.length;
-                                result.push(ts.removeFileExtension(normalizedMatch.substr(start, length_6)));
+                                var length_7 = normalizedMatch.length - start - normalizedSuffix.length;
+                                result.push(ts.removeFileExtension(normalizedMatch.substr(start, length_7)));
                             }
                             return result;
                         }
@@ -63831,30 +75866,27 @@ var ts;
                 }
                 return undefined;
             }
-            function enumeratePotentialNonRelativeModules(fragment, scriptPath, options) {
+            function enumeratePotentialNonRelativeModules(fragment, scriptPath, options, typeChecker, host) {
                 // Check If this is a nested module
                 var isNestedModule = fragment.indexOf(ts.directorySeparator) !== -1;
                 var moduleNameFragment = isNestedModule ? fragment.substr(0, fragment.lastIndexOf(ts.directorySeparator)) : undefined;
                 // Get modules that the type checker picked up
                 var ambientModules = ts.map(typeChecker.getAmbientModules(), function (sym) { return ts.stripQuotes(sym.name); });
-                var nonRelativeModules = ts.filter(ambientModules, function (moduleName) { return ts.startsWith(moduleName, fragment); });
+                var nonRelativeModuleNames = ts.filter(ambientModules, function (moduleName) { return ts.startsWith(moduleName, fragment); });
                 // Nested modules of the form "module-name/sub" need to be adjusted to only return the string
                 // after the last '/' that appears in the fragment because that's where the replacement span
                 // starts
                 if (isNestedModule) {
                     var moduleNameWithSeperator_1 = ts.ensureTrailingDirectorySeparator(moduleNameFragment);
-                    nonRelativeModules = ts.map(nonRelativeModules, function (moduleName) {
-                        if (ts.startsWith(fragment, moduleNameWithSeperator_1)) {
-                            return moduleName.substr(moduleNameWithSeperator_1.length);
-                        }
-                        return moduleName;
+                    nonRelativeModuleNames = ts.map(nonRelativeModuleNames, function (nonRelativeModuleName) {
+                        return ts.removePrefix(nonRelativeModuleName, moduleNameWithSeperator_1);
                     });
                 }
                 if (!options.moduleResolution || options.moduleResolution === ts.ModuleResolutionKind.NodeJs) {
                     for (var _i = 0, _a = enumerateNodeModulesVisibleToScript(host, scriptPath); _i < _a.length; _i++) {
                         var visibleModule = _a[_i];
                         if (!isNestedModule) {
-                            nonRelativeModules.push(visibleModule.moduleName);
+                            nonRelativeModuleNames.push(visibleModule.moduleName);
                         }
                         else if (ts.startsWith(visibleModule.moduleName, moduleNameFragment)) {
                             var nestedFiles = tryReadDirectory(host, visibleModule.moduleDir, ts.supportedTypeScriptExtensions, /*exclude*/ undefined, /*include*/ ["./*"]);
@@ -63863,16 +75895,16 @@ var ts;
                                     var f = nestedFiles_1[_b];
                                     f = ts.normalizePath(f);
                                     var nestedModule = ts.removeFileExtension(ts.getBaseFileName(f));
-                                    nonRelativeModules.push(nestedModule);
+                                    nonRelativeModuleNames.push(nestedModule);
                                 }
                             }
                         }
                     }
                 }
-                return ts.deduplicate(nonRelativeModules);
+                return ts.deduplicate(nonRelativeModuleNames);
             }
-            function getTripleSlashReferenceCompletion(sourceFile, position) {
-                var token = ts.getTokenAtPosition(sourceFile, position);
+            function getTripleSlashReferenceCompletion(sourceFile, position, compilerOptions, host) {
+                var token = ts.getTokenAtPosition(sourceFile, position, /*includeJsDocComment*/ false);
                 if (!token) {
                     return undefined;
                 }
@@ -63884,6 +75916,19 @@ var ts;
                 if (!range) {
                     return undefined;
                 }
+                var completionInfo = {
+                    /**
+                     * We don't want the editor to offer any other completions, such as snippets, inside a comment.
+                     */
+                    isGlobalCompletion: false,
+                    isMemberCompletion: false,
+                    /**
+                     * The user may type in a path that doesn't yet exist, creating a "new identifier"
+                     * with respect to the collection of identifiers the server is aware of.
+                     */
+                    isNewIdentifierLocation: true,
+                    entries: []
+                };
                 var text = sourceFile.text.substr(range.pos, position - range.pos);
                 var match = tripleSlashDirectiveFragmentRegex.exec(text);
                 if (match) {
@@ -63891,32 +75936,27 @@ var ts;
                     var kind = match[2];
                     var toComplete = match[3];
                     var scriptPath = ts.getDirectoryPath(sourceFile.path);
-                    var entries_3;
                     if (kind === "path") {
                         // Give completions for a relative path
                         var span_10 = getDirectoryFragmentTextSpan(toComplete, range.pos + prefix.length);
-                        entries_3 = getCompletionEntriesForDirectoryFragment(toComplete, scriptPath, ts.getSupportedExtensions(compilerOptions), /*includeExtensions*/ true, span_10, sourceFile.path);
+                        completionInfo.entries = getCompletionEntriesForDirectoryFragment(toComplete, scriptPath, ts.getSupportedExtensions(compilerOptions), /*includeExtensions*/ true, span_10, host, sourceFile.path);
                     }
                     else {
                         // Give completions based on the typings available
                         var span_11 = { start: range.pos + prefix.length, length: match[0].length - prefix.length };
-                        entries_3 = getCompletionEntriesFromTypings(host, compilerOptions, scriptPath, span_11);
+                        completionInfo.entries = getCompletionEntriesFromTypings(host, compilerOptions, scriptPath, span_11);
                     }
-                    return {
-                        isMemberCompletion: false,
-                        isNewIdentifierLocation: true,
-                        entries: entries_3
-                    };
                 }
-                return undefined;
+                return completionInfo;
             }
+            PathCompletions.getTripleSlashReferenceCompletion = getTripleSlashReferenceCompletion;
             function getCompletionEntriesFromTypings(host, options, scriptPath, span, result) {
                 if (result === void 0) { result = []; }
                 // Check for typings specified in compiler options
                 if (options.types) {
                     for (var _i = 0, _a = options.types; _i < _a.length; _i++) {
                         var moduleName = _a[_i];
-                        result.push(createCompletionEntryForModule(moduleName, ts.ScriptElementKind.externalModuleName, span));
+                        result.push(createCompletionEntryForModule(moduleName, "external module name" /* externalModuleName */, span));
                     }
                 }
                 else if (host.getDirectories) {
@@ -63929,33 +75969,33 @@ var ts;
                     if (typeRoots) {
                         for (var _b = 0, typeRoots_2 = typeRoots; _b < typeRoots_2.length; _b++) {
                             var root = typeRoots_2[_b];
-                            getCompletionEntriesFromDirectories(host, options, root, span, result);
+                            getCompletionEntriesFromDirectories(host, root, span, result);
                         }
                     }
                 }
                 if (host.getDirectories) {
                     // Also get all @types typings installed in visible node_modules directories
-                    for (var _c = 0, _d = findPackageJsons(scriptPath); _c < _d.length; _c++) {
+                    for (var _c = 0, _d = findPackageJsons(scriptPath, host); _c < _d.length; _c++) {
                         var packageJson = _d[_c];
                         var typesDir = ts.combinePaths(ts.getDirectoryPath(packageJson), "node_modules/@types");
-                        getCompletionEntriesFromDirectories(host, options, typesDir, span, result);
+                        getCompletionEntriesFromDirectories(host, typesDir, span, result);
                     }
                 }
                 return result;
             }
-            function getCompletionEntriesFromDirectories(host, options, directory, span, result) {
+            function getCompletionEntriesFromDirectories(host, directory, span, result) {
                 if (host.getDirectories && tryDirectoryExists(host, directory)) {
                     var directories = tryGetDirectories(host, directory);
                     if (directories) {
                         for (var _i = 0, directories_3 = directories; _i < directories_3.length; _i++) {
                             var typeDirectory = directories_3[_i];
                             typeDirectory = ts.normalizePath(typeDirectory);
-                            result.push(createCompletionEntryForModule(ts.getBaseFileName(typeDirectory), ts.ScriptElementKind.externalModuleName, span));
+                            result.push(createCompletionEntryForModule(ts.getBaseFileName(typeDirectory), "external module name" /* externalModuleName */, span));
                         }
                     }
                 }
             }
-            function findPackageJsons(currentDir) {
+            function findPackageJsons(currentDir, host) {
                 var paths = [];
                 var currentConfigPath;
                 while (true) {
@@ -63963,11 +76003,11 @@ var ts;
                     if (currentConfigPath) {
                         paths.push(currentConfigPath);
                         currentDir = ts.getDirectoryPath(currentConfigPath);
-                        var parent_16 = ts.getDirectoryPath(currentDir);
-                        if (currentDir === parent_16) {
+                        var parent_17 = ts.getDirectoryPath(currentDir);
+                        if (currentDir === parent_17) {
                             break;
                         }
-                        currentDir = parent_16;
+                        currentDir = parent_17;
                     }
                     else {
                         break;
@@ -63978,7 +76018,7 @@ var ts;
             function enumerateNodeModulesVisibleToScript(host, scriptPath) {
                 var result = [];
                 if (host.readFile && host.fileExists) {
-                    for (var _i = 0, _a = findPackageJsons(scriptPath); _i < _a.length; _i++) {
+                    for (var _i = 0, _a = findPackageJsons(scriptPath, host); _i < _a.length; _i++) {
                         var packageJson = _a[_i];
                         var contents = tryReadingPackageJson(packageJson);
                         if (!contents) {
@@ -64022,7 +76062,7 @@ var ts;
                 }
             }
             function createCompletionEntryForModule(name, kind, replacementSpan) {
-                return { name: name, kind: kind, kindModifiers: ts.ScriptElementKindModifier.none, sortText: name, replacementSpan: replacementSpan };
+                return { name: name, kind: kind, kindModifiers: "" /* none */, sortText: name, replacementSpan: replacementSpan };
             }
             // Replace everything after the last directory seperator that appears
             function getDirectoryFragmentTextSpan(text, textStart) {
@@ -64042,38 +76082,353 @@ var ts;
             function normalizeAndPreserveTrailingSlash(path) {
                 return ts.hasTrailingDirectorySeparator(path) ? ts.ensureTrailingDirectorySeparator(ts.normalizePath(path)) : ts.normalizePath(path);
             }
+            /**
+             * Matches a triple slash reference directive with an incomplete string literal for its path. Used
+             * to determine if the caret is currently within the string literal and capture the literal fragment
+             * for completions.
+             * For example, this matches
+             *
+             * /// <reference path="fragment
+             *
+             * but not
+             *
+             * /// <reference path="fragment"
+             */
+            var tripleSlashDirectiveFragmentRegex = /^(\/\/\/\s*<reference\s+(path|types)\s*=\s*(?:'|"))([^\3"]*)$/;
+            var nodeModulesDependencyKeys = ["dependencies", "devDependencies", "peerDependencies", "optionalDependencies"];
+            function tryGetDirectories(host, directoryName) {
+                return tryIOAndConsumeErrors(host, host.getDirectories, directoryName);
+            }
+            function tryReadDirectory(host, path, extensions, exclude, include) {
+                return tryIOAndConsumeErrors(host, host.readDirectory, path, extensions, exclude, include);
+            }
+            function tryReadFile(host, path) {
+                return tryIOAndConsumeErrors(host, host.readFile, path);
+            }
+            function tryFileExists(host, path) {
+                return tryIOAndConsumeErrors(host, host.fileExists, path);
+            }
+            function tryDirectoryExists(host, path) {
+                try {
+                    return ts.directoryProbablyExists(path, host);
+                }
+                catch (e) { }
+                return undefined;
+            }
+            function tryIOAndConsumeErrors(host, toApply) {
+                var args = [];
+                for (var _i = 2; _i < arguments.length; _i++) {
+                    args[_i - 2] = arguments[_i];
+                }
+                try {
+                    return toApply && toApply.apply(host, args);
+                }
+                catch (e) { }
+                return undefined;
+            }
+        })(PathCompletions = Completions.PathCompletions || (Completions.PathCompletions = {}));
+    })(Completions = ts.Completions || (ts.Completions = {}));
+})(ts || (ts = {}));
+/// <reference path="./pathCompletions.ts" />
+/* @internal */
+var ts;
+(function (ts) {
+    var Completions;
+    (function (Completions) {
+        var KeywordCompletionFilters;
+        (function (KeywordCompletionFilters) {
+            KeywordCompletionFilters[KeywordCompletionFilters["None"] = 0] = "None";
+            KeywordCompletionFilters[KeywordCompletionFilters["ClassElementKeywords"] = 1] = "ClassElementKeywords";
+            KeywordCompletionFilters[KeywordCompletionFilters["ConstructorParameterKeywords"] = 2] = "ConstructorParameterKeywords";
+        })(KeywordCompletionFilters || (KeywordCompletionFilters = {}));
+        function getCompletionsAtPosition(host, typeChecker, log, compilerOptions, sourceFile, position) {
+            if (ts.isInReferenceComment(sourceFile, position)) {
+                return Completions.PathCompletions.getTripleSlashReferenceCompletion(sourceFile, position, compilerOptions, host);
+            }
+            if (ts.isInString(sourceFile, position)) {
+                return getStringLiteralCompletionEntries(sourceFile, position, typeChecker, compilerOptions, host, log);
+            }
+            var completionData = getCompletionData(typeChecker, log, sourceFile, position);
+            if (!completionData) {
+                return undefined;
+            }
+            var symbols = completionData.symbols, isGlobalCompletion = completionData.isGlobalCompletion, isMemberCompletion = completionData.isMemberCompletion, isNewIdentifierLocation = completionData.isNewIdentifierLocation, location = completionData.location, request = completionData.request, keywordFilters = completionData.keywordFilters;
+            if (sourceFile.languageVariant === 1 /* JSX */ &&
+                location && location.parent && location.parent.kind === 252 /* JsxClosingElement */) {
+                // In the TypeScript JSX element, if such element is not defined. When users query for completion at closing tag,
+                // instead of simply giving unknown value, the completion will return the tag-name of an associated opening-element.
+                // For example:
+                //     var x = <div> </ /*1*/>  completion list at "1" will contain "div" with type any
+                var tagName = location.parent.parent.openingElement.tagName;
+                return { isGlobalCompletion: false, isMemberCompletion: true, isNewIdentifierLocation: false,
+                    entries: [{
+                            name: tagName.getFullText(),
+                            kind: "class" /* classElement */,
+                            kindModifiers: undefined,
+                            sortText: "0",
+                        }] };
+            }
+            if (request) {
+                var entries_2 = request.kind === "JsDocTagName"
+                    ? ts.JsDoc.getJSDocTagNameCompletions()
+                    : request.kind === "JsDocTag"
+                        ? ts.JsDoc.getJSDocTagCompletions()
+                        : ts.JsDoc.getJSDocParameterNameCompletions(request.tag);
+                return { isGlobalCompletion: false, isMemberCompletion: false, isNewIdentifierLocation: false, entries: entries_2 };
+            }
+            var entries = [];
+            if (ts.isSourceFileJavaScript(sourceFile)) {
+                var uniqueNames = getCompletionEntriesFromSymbols(symbols, entries, location, /*performCharacterChecks*/ true, typeChecker, compilerOptions.target, log);
+                ts.addRange(entries, getJavaScriptCompletionEntries(sourceFile, location.pos, uniqueNames, compilerOptions.target));
+            }
+            else {
+                if ((!symbols || symbols.length === 0) && keywordFilters === 0 /* None */) {
+                    return undefined;
+                }
+                getCompletionEntriesFromSymbols(symbols, entries, location, /*performCharacterChecks*/ true, typeChecker, compilerOptions.target, log);
+            }
+            // TODO add filter for keyword based on type/value/namespace and also location
+            // Add all keywords if
+            // - this is not a member completion list (all the keywords)
+            // - other filters are enabled in required scenario so add those keywords
+            if (keywordFilters !== 0 /* None */ || !isMemberCompletion) {
+                ts.addRange(entries, getKeywordCompletions(keywordFilters));
+            }
+            return { isGlobalCompletion: isGlobalCompletion, isMemberCompletion: isMemberCompletion, isNewIdentifierLocation: isNewIdentifierLocation, entries: entries };
         }
         Completions.getCompletionsAtPosition = getCompletionsAtPosition;
+        function getJavaScriptCompletionEntries(sourceFile, position, uniqueNames, target) {
+            var entries = [];
+            var nameTable = ts.getNameTable(sourceFile);
+            nameTable.forEach(function (pos, name) {
+                // Skip identifiers produced only from the current location
+                if (pos === position) {
+                    return;
+                }
+                if (!uniqueNames.get(name)) {
+                    uniqueNames.set(name, name);
+                    var displayName = getCompletionEntryDisplayName(ts.unescapeIdentifier(name), target, /*performCharacterChecks*/ true);
+                    if (displayName) {
+                        var entry = {
+                            name: displayName,
+                            kind: "warning" /* warning */,
+                            kindModifiers: "",
+                            sortText: "1"
+                        };
+                        entries.push(entry);
+                    }
+                }
+            });
+            return entries;
+        }
+        function createCompletionEntry(symbol, location, performCharacterChecks, typeChecker, target) {
+            // Try to get a valid display name for this symbol, if we could not find one, then ignore it.
+            // We would like to only show things that can be added after a dot, so for instance numeric properties can
+            // not be accessed with a dot (a.1 <- invalid)
+            var displayName = getCompletionEntryDisplayNameForSymbol(typeChecker, symbol, target, performCharacterChecks, location);
+            if (!displayName) {
+                return undefined;
+            }
+            // TODO(drosen): Right now we just permit *all* semantic meanings when calling
+            // 'getSymbolKind' which is permissible given that it is backwards compatible; but
+            // really we should consider passing the meaning for the node so that we don't report
+            // that a suggestion for a value is an interface.  We COULD also just do what
+            // 'getSymbolModifiers' does, which is to use the first declaration.
+            // Use a 'sortText' of 0' so that all symbol completion entries come before any other
+            // entries (like JavaScript identifier entries).
+            return {
+                name: displayName,
+                kind: ts.SymbolDisplay.getSymbolKind(typeChecker, symbol, location),
+                kindModifiers: ts.SymbolDisplay.getSymbolModifiers(symbol),
+                sortText: "0",
+            };
+        }
+        function getCompletionEntriesFromSymbols(symbols, entries, location, performCharacterChecks, typeChecker, target, log) {
+            var start = ts.timestamp();
+            var uniqueNames = ts.createMap();
+            if (symbols) {
+                for (var _i = 0, symbols_5 = symbols; _i < symbols_5.length; _i++) {
+                    var symbol = symbols_5[_i];
+                    var entry = createCompletionEntry(symbol, location, performCharacterChecks, typeChecker, target);
+                    if (entry) {
+                        var id = ts.escapeIdentifier(entry.name);
+                        if (!uniqueNames.get(id)) {
+                            entries.push(entry);
+                            uniqueNames.set(id, id);
+                        }
+                    }
+                }
+            }
+            log("getCompletionsAtPosition: getCompletionEntriesFromSymbols: " + (ts.timestamp() - start));
+            return uniqueNames;
+        }
+        function getStringLiteralCompletionEntries(sourceFile, position, typeChecker, compilerOptions, host, log) {
+            var node = ts.findPrecedingToken(position, sourceFile);
+            if (!node || node.kind !== 9 /* StringLiteral */) {
+                return undefined;
+            }
+            if (node.parent.kind === 261 /* PropertyAssignment */ &&
+                node.parent.parent.kind === 178 /* ObjectLiteralExpression */ &&
+                node.parent.name === node) {
+                // Get quoted name of properties of the object literal expression
+                // i.e. interface ConfigFiles {
+                //          'jspm:dev': string
+                //      }
+                //      let files: ConfigFiles = {
+                //          '/*completion position*/'
+                //      }
+                //
+                //      function foo(c: ConfigFiles) {}
+                //      foo({
+                //          '/*completion position*/'
+                //      });
+                return getStringLiteralCompletionEntriesFromPropertyAssignment(node.parent, typeChecker, compilerOptions.target, log);
+            }
+            else if (ts.isElementAccessExpression(node.parent) && node.parent.argumentExpression === node) {
+                // Get all names of properties on the expression
+                // i.e. interface A {
+                //      'prop1': string
+                // }
+                // let a: A;
+                // a['/*completion position*/']
+                return getStringLiteralCompletionEntriesFromElementAccess(node.parent, typeChecker, compilerOptions.target, log);
+            }
+            else if (node.parent.kind === 238 /* ImportDeclaration */ || ts.isExpressionOfExternalModuleImportEqualsDeclaration(node) || ts.isRequireCall(node.parent, /*checkArgumentIsStringLiteral*/ false)) {
+                // Get all known external module names or complete a path to a module
+                // i.e. import * as ns from "/*completion position*/";
+                //      import x = require("/*completion position*/");
+                //      var y = require("/*completion position*/");
+                return Completions.PathCompletions.getStringLiteralCompletionEntriesFromModuleNames(node, compilerOptions, host, typeChecker);
+            }
+            else if (isEqualityExpression(node.parent)) {
+                // Get completions from the type of the other operand
+                // i.e. switch (a) {
+                //         case '/*completion position*/'
+                //      }
+                return getStringLiteralCompletionEntriesFromType(typeChecker.getTypeAtLocation(node.parent.left === node ? node.parent.right : node.parent.left), typeChecker);
+            }
+            else if (ts.isCaseOrDefaultClause(node.parent)) {
+                // Get completions from the type of the switch expression
+                // i.e. x === '/*completion position'
+                return getStringLiteralCompletionEntriesFromType(typeChecker.getTypeAtLocation(node.parent.parent.parent.expression), typeChecker);
+            }
+            else {
+                var argumentInfo = ts.SignatureHelp.getImmediatelyContainingArgumentInfo(node, position, sourceFile);
+                if (argumentInfo) {
+                    // Get string literal completions from specialized signatures of the target
+                    // i.e. declare function f(a: 'A');
+                    // f("/*completion position*/")
+                    return getStringLiteralCompletionEntriesFromCallExpression(argumentInfo, typeChecker);
+                }
+                // Get completion for string literal from string literal type
+                // i.e. var x: "hi" | "hello" = "/*completion position*/"
+                return getStringLiteralCompletionEntriesFromType(typeChecker.getContextualType(node), typeChecker);
+            }
+        }
+        function getStringLiteralCompletionEntriesFromPropertyAssignment(element, typeChecker, target, log) {
+            var type = typeChecker.getContextualType(element.parent);
+            var entries = [];
+            if (type) {
+                getCompletionEntriesFromSymbols(type.getApparentProperties(), entries, element, /*performCharacterChecks*/ false, typeChecker, target, log);
+                if (entries.length) {
+                    return { isGlobalCompletion: false, isMemberCompletion: true, isNewIdentifierLocation: true, entries: entries };
+                }
+            }
+        }
+        function getStringLiteralCompletionEntriesFromCallExpression(argumentInfo, typeChecker) {
+            var candidates = [];
+            var entries = [];
+            var uniques = ts.createMap();
+            typeChecker.getResolvedSignature(argumentInfo.invocation, candidates);
+            for (var _i = 0, candidates_3 = candidates; _i < candidates_3.length; _i++) {
+                var candidate = candidates_3[_i];
+                addStringLiteralCompletionsFromType(typeChecker.getParameterType(candidate, argumentInfo.argumentIndex), entries, typeChecker, uniques);
+            }
+            if (entries.length) {
+                return { isGlobalCompletion: false, isMemberCompletion: false, isNewIdentifierLocation: true, entries: entries };
+            }
+            return undefined;
+        }
+        function getStringLiteralCompletionEntriesFromElementAccess(node, typeChecker, target, log) {
+            var type = typeChecker.getTypeAtLocation(node.expression);
+            var entries = [];
+            if (type) {
+                getCompletionEntriesFromSymbols(type.getApparentProperties(), entries, node, /*performCharacterChecks*/ false, typeChecker, target, log);
+                if (entries.length) {
+                    return { isGlobalCompletion: false, isMemberCompletion: true, isNewIdentifierLocation: true, entries: entries };
+                }
+            }
+            return undefined;
+        }
+        function getStringLiteralCompletionEntriesFromType(type, typeChecker) {
+            if (type) {
+                var entries = [];
+                addStringLiteralCompletionsFromType(type, entries, typeChecker);
+                if (entries.length) {
+                    return { isGlobalCompletion: false, isMemberCompletion: false, isNewIdentifierLocation: false, entries: entries };
+                }
+            }
+            return undefined;
+        }
+        function addStringLiteralCompletionsFromType(type, result, typeChecker, uniques) {
+            if (uniques === void 0) { uniques = ts.createMap(); }
+            if (type && type.flags & 16384 /* TypeParameter */) {
+                type = typeChecker.getBaseConstraintOfType(type);
+            }
+            if (!type) {
+                return;
+            }
+            if (type.flags & 65536 /* Union */) {
+                for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                    var t = _a[_i];
+                    addStringLiteralCompletionsFromType(t, result, typeChecker, uniques);
+                }
+            }
+            else if (type.flags & 32 /* StringLiteral */) {
+                var name_60 = type.value;
+                if (!uniques.has(name_60)) {
+                    uniques.set(name_60, true);
+                    result.push({
+                        name: name_60,
+                        kindModifiers: "" /* none */,
+                        kind: "var" /* variableElement */,
+                        sortText: "0"
+                    });
+                }
+            }
+        }
         function getCompletionEntryDetails(typeChecker, log, compilerOptions, sourceFile, position, entryName) {
             // Compute all the completion symbols again.
             var completionData = getCompletionData(typeChecker, log, sourceFile, position);
             if (completionData) {
-                var symbols = completionData.symbols, location_2 = completionData.location;
+                var symbols = completionData.symbols, location_3 = completionData.location;
                 // Find the symbol with the matching entry name.
                 // We don't need to perform character checks here because we're only comparing the
                 // name against 'entryName' (which is known to be good), not building a new
                 // completion entry.
-                var symbol = ts.forEach(symbols, function (s) { return getCompletionEntryDisplayNameForSymbol(typeChecker, s, compilerOptions.target, /*performCharacterChecks*/ false, location_2) === entryName ? s : undefined; });
+                var symbol = ts.forEach(symbols, function (s) { return getCompletionEntryDisplayNameForSymbol(typeChecker, s, compilerOptions.target, /*performCharacterChecks*/ false, location_3) === entryName ? s : undefined; });
                 if (symbol) {
-                    var _a = ts.SymbolDisplay.getSymbolDisplayPartsDocumentationAndSymbolKind(typeChecker, symbol, sourceFile, location_2, location_2, 7 /* All */), displayParts = _a.displayParts, documentation = _a.documentation, symbolKind = _a.symbolKind;
+                    var _a = ts.SymbolDisplay.getSymbolDisplayPartsDocumentationAndSymbolKind(typeChecker, symbol, sourceFile, location_3, location_3, 7 /* All */), displayParts = _a.displayParts, documentation = _a.documentation, symbolKind = _a.symbolKind, tags = _a.tags;
                     return {
                         name: entryName,
                         kindModifiers: ts.SymbolDisplay.getSymbolModifiers(symbol),
                         kind: symbolKind,
                         displayParts: displayParts,
-                        documentation: documentation
+                        documentation: documentation,
+                        tags: tags
                     };
                 }
             }
             // Didn't find a symbol with this name.  See if we can find a keyword instead.
-            var keywordCompletion = ts.forEach(keywordCompletions, function (c) { return c.name === entryName; });
+            var keywordCompletion = ts.forEach(getKeywordCompletions(0 /* None */), function (c) { return c.name === entryName; });
             if (keywordCompletion) {
                 return {
                     name: entryName,
-                    kind: ts.ScriptElementKind.keyword,
-                    kindModifiers: ts.ScriptElementKindModifier.none,
+                    kind: "keyword" /* keyword */,
+                    kindModifiers: "" /* none */,
                     displayParts: [ts.displayPart(entryName, ts.SymbolDisplayPartKind.keyword)],
-                    documentation: undefined
+                    documentation: undefined,
+                    tags: undefined
                 };
             }
             return undefined;
@@ -64083,56 +76438,84 @@ var ts;
             // Compute all the completion symbols again.
             var completionData = getCompletionData(typeChecker, log, sourceFile, position);
             if (completionData) {
-                var symbols = completionData.symbols, location_3 = completionData.location;
+                var symbols = completionData.symbols, location_4 = completionData.location;
                 // Find the symbol with the matching entry name.
                 // We don't need to perform character checks here because we're only comparing the
                 // name against 'entryName' (which is known to be good), not building a new
                 // completion entry.
-                return ts.forEach(symbols, function (s) { return getCompletionEntryDisplayNameForSymbol(typeChecker, s, compilerOptions.target, /*performCharacterChecks*/ false, location_3) === entryName ? s : undefined; });
+                return ts.forEach(symbols, function (s) { return getCompletionEntryDisplayNameForSymbol(typeChecker, s, compilerOptions.target, /*performCharacterChecks*/ false, location_4) === entryName ? s : undefined; });
             }
             return undefined;
         }
         Completions.getCompletionEntrySymbol = getCompletionEntrySymbol;
         function getCompletionData(typeChecker, log, sourceFile, position) {
             var isJavaScriptFile = ts.isSourceFileJavaScript(sourceFile);
-            var isJsDocTagName = false;
+            var request;
             var start = ts.timestamp();
-            var currentToken = ts.getTokenAtPosition(sourceFile, position);
+            var currentToken = ts.getTokenAtPosition(sourceFile, position, /*includeJsDocComment*/ false); // TODO: GH#15853
+            // We will check for jsdoc comments with insideComment and getJsDocTagAtPosition. (TODO: that seems rather inefficient to check the same thing so many times.)
             log("getCompletionData: Get current token: " + (ts.timestamp() - start));
             start = ts.timestamp();
             // Completion not allowed inside comments, bail out if this is the case
-            var insideComment = ts.isInsideComment(sourceFile, currentToken, position);
+            var insideComment = ts.isInComment(sourceFile, position, currentToken);
             log("getCompletionData: Is inside comment: " + (ts.timestamp() - start));
+            var insideJsDocTagTypeExpression = false;
             if (insideComment) {
-                // The current position is next to the '@' sign, when no tag name being provided yet.
-                // Provide a full list of tag names
-                if (ts.hasDocComment(sourceFile, position) && sourceFile.text.charCodeAt(position - 1) === 64 /* at */) {
-                    isJsDocTagName = true;
+                if (ts.hasDocComment(sourceFile, position)) {
+                    if (sourceFile.text.charCodeAt(position - 1) === 64 /* at */) {
+                        // The current position is next to the '@' sign, when no tag name being provided yet.
+                        // Provide a full list of tag names
+                        request = { kind: "JsDocTagName" };
+                    }
+                    else {
+                        // When completion is requested without "@", we will have check to make sure that
+                        // there are no comments prefix the request position. We will only allow "*" and space.
+                        // e.g
+                        //   /** |c| /*
+                        //
+                        //   /**
+                        //     |c|
+                        //    */
+                        //
+                        //   /**
+                        //    * |c|
+                        //    */
+                        //
+                        //   /**
+                        //    *         |c|
+                        //    */
+                        var lineStart = ts.getLineStartPositionForPosition(position, sourceFile);
+                        if (!(sourceFile.text.substring(lineStart, position).match(/[^\*|\s|(/\*\*)]/))) {
+                            request = { kind: "JsDocTag" };
+                        }
+                    }
                 }
                 // Completion should work inside certain JsDoc tags. For example:
                 //     /** @type {number | string} */
                 // Completion should work in the brackets
-                var insideJsDocTagExpression = false;
-                var tag = ts.getJsDocTagAtPosition(sourceFile, position);
+                var tag = getJsDocTagAtPosition(currentToken, position);
                 if (tag) {
                     if (tag.tagName.pos <= position && position <= tag.tagName.end) {
-                        isJsDocTagName = true;
+                        request = { kind: "JsDocTagName" };
                     }
-                    switch (tag.kind) {
-                        case 277 /* JSDocTypeTag */:
-                        case 275 /* JSDocParameterTag */:
-                        case 276 /* JSDocReturnTag */:
-                            var tagWithExpression = tag;
-                            if (tagWithExpression.typeExpression) {
-                                insideJsDocTagExpression = tagWithExpression.typeExpression.pos < position && position < tagWithExpression.typeExpression.end;
-                            }
-                            break;
+                    if (isTagWithTypeExpression(tag) && tag.typeExpression) {
+                        currentToken = ts.getTokenAtPosition(sourceFile, position, /*includeJsDocComment*/ true);
+                        if (!currentToken ||
+                            (!ts.isDeclarationName(currentToken) &&
+                                (currentToken.parent.kind !== 292 /* JSDocPropertyTag */ ||
+                                    currentToken.parent.name !== currentToken))) {
+                            // Use as type location if inside tag's type expression
+                            insideJsDocTagTypeExpression = isCurrentlyEditingNode(tag.typeExpression);
+                        }
+                    }
+                    if (ts.isJSDocParameterTag(tag) && (ts.nodeIsMissing(tag.name) || tag.name.pos <= position && position <= tag.name.end)) {
+                        request = { kind: "JsDocParameterName", tag: tag };
                     }
                 }
-                if (isJsDocTagName) {
-                    return { symbols: undefined, isMemberCompletion: false, isNewIdentifierLocation: false, location: undefined, isRightOfDot: false, isJsDocTagName: isJsDocTagName };
+                if (request) {
+                    return { symbols: undefined, isGlobalCompletion: false, isMemberCompletion: false, isNewIdentifierLocation: false, location: undefined, isRightOfDot: false, request: request, keywordFilters: 0 /* None */ };
                 }
-                if (!insideJsDocTagExpression) {
+                if (!insideJsDocTagTypeExpression) {
                     // Proceed if the current position is in jsDoc tag expression; otherwise it is a normal
                     // comment or the plain text part of a jsDoc comment, so no completion should be available
                     log("Returning an empty list because completion was inside a regular comment or plain text part of a JsDoc comment.");
@@ -64140,7 +76523,7 @@ var ts;
                 }
             }
             start = ts.timestamp();
-            var previousToken = ts.findPrecedingToken(position, sourceFile);
+            var previousToken = ts.findPrecedingToken(position, sourceFile, /*startNode*/ undefined, insideJsDocTagTypeExpression);
             log("getCompletionData: Get previous token 1: " + (ts.timestamp() - start));
             // The decision to provide completion depends on the contextToken, which is determined through the previousToken.
             // Note: 'previousToken' (and thus 'contextToken') can be undefined if we are the beginning of the file
@@ -64149,7 +76532,7 @@ var ts;
             // Skip this partial identifier and adjust the contextToken to the token that precedes it.
             if (contextToken && position <= contextToken.end && ts.isWord(contextToken.kind)) {
                 var start_2 = ts.timestamp();
-                contextToken = ts.findPrecedingToken(contextToken.getFullStart(), sourceFile);
+                contextToken = ts.findPrecedingToken(contextToken.getFullStart(), sourceFile, /*startNode*/ undefined, insideJsDocTagTypeExpression);
                 log("getCompletionData: Get previous token 2: " + (ts.timestamp() - start_2));
             }
             // Find the node where completion is requested on.
@@ -64159,20 +76542,20 @@ var ts;
             var isRightOfDot = false;
             var isRightOfOpenTag = false;
             var isStartingCloseTag = false;
-            var location = ts.getTouchingPropertyName(sourceFile, position);
+            var location = ts.getTouchingPropertyName(sourceFile, position, insideJsDocTagTypeExpression); // TODO: GH#15853
             if (contextToken) {
                 // Bail out if this is a known invalid completion location
                 if (isCompletionListBlocker(contextToken)) {
                     log("Returning an empty list because completion was requested in an invalid position.");
                     return undefined;
                 }
-                var parent_17 = contextToken.parent, kind = contextToken.kind;
-                if (kind === 21 /* DotToken */) {
-                    if (parent_17.kind === 172 /* PropertyAccessExpression */) {
+                var parent_18 = contextToken.parent;
+                if (contextToken.kind === 23 /* DotToken */) {
+                    if (parent_18.kind === 179 /* PropertyAccessExpression */) {
                         node = contextToken.parent.expression;
                         isRightOfDot = true;
                     }
-                    else if (parent_17.kind === 139 /* QualifiedName */) {
+                    else if (parent_18.kind === 143 /* QualifiedName */) {
                         node = contextToken.parent.left;
                         isRightOfDot = true;
                     }
@@ -64183,19 +76566,42 @@ var ts;
                     }
                 }
                 else if (sourceFile.languageVariant === 1 /* JSX */) {
-                    if (kind === 25 /* LessThanToken */) {
-                        isRightOfOpenTag = true;
-                        location = contextToken;
-                    }
-                    else if (kind === 39 /* SlashToken */ && contextToken.parent.kind === 245 /* JsxClosingElement */) {
-                        isStartingCloseTag = true;
-                        location = contextToken;
+                    // <UI.Test /* completion position */ />
+                    // If the tagname is a property access expression, we will then walk up to the top most of property access expression.
+                    // Then, try to get a JSX container and its associated attributes type.
+                    if (parent_18 && parent_18.kind === 179 /* PropertyAccessExpression */) {
+                        contextToken = parent_18;
+                        parent_18 = parent_18.parent;
+                    }
+                    switch (parent_18.kind) {
+                        case 252 /* JsxClosingElement */:
+                            if (contextToken.kind === 41 /* SlashToken */) {
+                                isStartingCloseTag = true;
+                                location = contextToken;
+                            }
+                            break;
+                        case 194 /* BinaryExpression */:
+                            if (!(parent_18.left.flags & 32768 /* ThisNodeHasError */)) {
+                                // It has a left-hand side, so we're not in an opening JSX tag.
+                                break;
+                            }
+                        // falls through
+                        case 250 /* JsxSelfClosingElement */:
+                        case 249 /* JsxElement */:
+                        case 251 /* JsxOpeningElement */:
+                            if (contextToken.kind === 27 /* LessThanToken */) {
+                                isRightOfOpenTag = true;
+                                location = contextToken;
+                            }
+                            break;
                     }
                 }
             }
             var semanticStart = ts.timestamp();
+            var isGlobalCompletion = false;
             var isMemberCompletion;
             var isNewIdentifierLocation;
+            var keywordFilters = 0 /* None */;
             var symbols = [];
             if (isRightOfDot) {
                 getTypeScriptMemberSymbols();
@@ -64229,12 +76635,27 @@ var ts;
                 }
             }
             log("getCompletionData: Semantic work: " + (ts.timestamp() - semanticStart));
-            return { symbols: symbols, isMemberCompletion: isMemberCompletion, isNewIdentifierLocation: isNewIdentifierLocation, location: location, isRightOfDot: (isRightOfDot || isRightOfOpenTag), isJsDocTagName: isJsDocTagName };
+            return { symbols: symbols, isGlobalCompletion: isGlobalCompletion, isMemberCompletion: isMemberCompletion, isNewIdentifierLocation: isNewIdentifierLocation, location: location, isRightOfDot: (isRightOfDot || isRightOfOpenTag), request: request, keywordFilters: keywordFilters };
+            function isTagWithTypeExpression(tag) {
+                switch (tag.kind) {
+                    case 285 /* JSDocAugmentsTag */:
+                    case 287 /* JSDocParameterTag */:
+                    case 292 /* JSDocPropertyTag */:
+                    case 288 /* JSDocReturnTag */:
+                    case 289 /* JSDocTypeTag */:
+                    case 291 /* JSDocTypedefTag */:
+                        return true;
+                }
+            }
             function getTypeScriptMemberSymbols() {
                 // Right of dot member completion list
+                isGlobalCompletion = false;
                 isMemberCompletion = true;
                 isNewIdentifierLocation = false;
-                if (node.kind === 69 /* Identifier */ || node.kind === 139 /* QualifiedName */ || node.kind === 172 /* PropertyAccessExpression */) {
+                // Since this is qualified name check its a type node location
+                var isTypeLocation = ts.isPartOfTypeNode(node.parent) || insideJsDocTagTypeExpression;
+                var isRhsOfImportDeclaration = ts.isInRightSideOfInternalImportEqualsDeclaration(node);
+                if (node.kind === 71 /* Identifier */ || node.kind === 143 /* QualifiedName */ || node.kind === 179 /* PropertyAccessExpression */) {
                     var symbol = typeChecker.getSymbolAtLocation(node);
                     // This is an alias, follow what it aliases
                     if (symbol && symbol.flags & 8388608 /* Alias */) {
@@ -64243,15 +76664,23 @@ var ts;
                     if (symbol && symbol.flags & 1952 /* HasExports */) {
                         // Extract module or enum members
                         var exportedSymbols = typeChecker.getExportsOfModule(symbol);
+                        var isValidValueAccess_1 = function (symbol) { return typeChecker.isValidPropertyAccess((node.parent), symbol.name); };
+                        var isValidTypeAccess_1 = function (symbol) { return symbolCanbeReferencedAtTypeLocation(symbol); };
+                        var isValidAccess_1 = isRhsOfImportDeclaration ?
+                            // Any kind is allowed when dotting off namespace in internal import equals declaration
+                            function (symbol) { return isValidTypeAccess_1(symbol) || isValidValueAccess_1(symbol); } :
+                            isTypeLocation ? isValidTypeAccess_1 : isValidValueAccess_1;
                         ts.forEach(exportedSymbols, function (symbol) {
-                            if (typeChecker.isValidPropertyAccess((node.parent), symbol.name)) {
+                            if (isValidAccess_1(symbol)) {
                                 symbols.push(symbol);
                             }
                         });
                     }
                 }
-                var type = typeChecker.getTypeAtLocation(node);
-                addTypeProperties(type);
+                if (!isTypeLocation) {
+                    var type = typeChecker.getTypeAtLocation(node);
+                    addTypeProperties(type);
+                }
             }
             function addTypeProperties(type) {
                 if (type) {
@@ -64262,7 +76691,7 @@ var ts;
                             symbols.push(symbol);
                         }
                     }
-                    if (isJavaScriptFile && type.flags & 524288 /* Union */) {
+                    if (isJavaScriptFile && type.flags & 65536 /* Union */) {
                         // In javascript files, for union types, we don't just get the members that
                         // the individual types have in common, we also include all the members that
                         // each individual type has.  This is because we're going to add all identifiers
@@ -64279,6 +76708,7 @@ var ts;
             function tryGetGlobalSymbols() {
                 var objectLikeContainer;
                 var namedImportsOrExports;
+                var classLikeContainer;
                 var jsxContainer;
                 if (objectLikeContainer = tryGetObjectLikeCompletionContainer(contextToken)) {
                     return tryGetObjectLikeCompletionSymbols(objectLikeContainer);
@@ -64288,13 +76718,27 @@ var ts;
                     // try to show exported member for imported module
                     return tryGetImportOrExportClauseCompletionSymbols(namedImportsOrExports);
                 }
+                if (tryGetConstructorLikeCompletionContainer(contextToken)) {
+                    // no members, only keywords
+                    isMemberCompletion = false;
+                    // Declaring new property/method/accessor
+                    isNewIdentifierLocation = true;
+                    // Has keywords for constructor parameter
+                    keywordFilters = 2 /* ConstructorParameterKeywords */;
+                    return true;
+                }
+                if (classLikeContainer = tryGetClassLikeCompletionContainer(contextToken)) {
+                    // cursor inside class declaration
+                    getGetClassLikeCompletionSymbols(classLikeContainer);
+                    return true;
+                }
                 if (jsxContainer = tryGetContainingJsxElement(contextToken)) {
                     var attrsType = void 0;
-                    if ((jsxContainer.kind === 242 /* JsxSelfClosingElement */) || (jsxContainer.kind === 243 /* JsxOpeningElement */)) {
+                    if ((jsxContainer.kind === 250 /* JsxSelfClosingElement */) || (jsxContainer.kind === 251 /* JsxOpeningElement */)) {
                         // Cursor is inside a JSX self-closing element or opening element
-                        attrsType = typeChecker.getJsxElementAttributesType(jsxContainer);
+                        attrsType = typeChecker.getAllAttributesTypeFromJsxOpeningLikeElement(jsxContainer);
                         if (attrsType) {
-                            symbols = filterJsxAttributes(typeChecker.getPropertiesOfType(attrsType), jsxContainer.attributes);
+                            symbols = filterJsxAttributes(typeChecker.getPropertiesOfType(attrsType), jsxContainer.attributes.properties);
                             isMemberCompletion = true;
                             isNewIdentifierLocation = false;
                             return true;
@@ -64336,11 +76780,80 @@ var ts;
                     previousToken.getStart() :
                     position;
                 var scopeNode = getScopeNode(contextToken, adjustedPosition, sourceFile) || sourceFile;
-                /// TODO filter meaning based on the current context
+                if (scopeNode) {
+                    isGlobalCompletion =
+                        scopeNode.kind === 265 /* SourceFile */ ||
+                            scopeNode.kind === 196 /* TemplateExpression */ ||
+                            scopeNode.kind === 256 /* JsxExpression */ ||
+                            ts.isStatement(scopeNode);
+                }
                 var symbolMeanings = 793064 /* Type */ | 107455 /* Value */ | 1920 /* Namespace */ | 8388608 /* Alias */;
-                symbols = typeChecker.getSymbolsInScope(scopeNode, symbolMeanings);
+                symbols = filterGlobalCompletion(typeChecker.getSymbolsInScope(scopeNode, symbolMeanings));
                 return true;
             }
+            function filterGlobalCompletion(symbols) {
+                return ts.filter(symbols, function (symbol) {
+                    if (!ts.isSourceFile(location)) {
+                        // export = /**/ here we want to get all meanings, so any symbol is ok
+                        if (ts.isExportAssignment(location.parent)) {
+                            return true;
+                        }
+                        // This is an alias, follow what it aliases
+                        if (symbol && symbol.flags & 8388608 /* Alias */) {
+                            symbol = typeChecker.getAliasedSymbol(symbol);
+                        }
+                        // import m = /**/ <-- It can only access namespace (if typing import = x. this would get member symbols and not namespace)
+                        if (ts.isInRightSideOfInternalImportEqualsDeclaration(location)) {
+                            return !!(symbol.flags & 1920 /* Namespace */);
+                        }
+                        if (insideJsDocTagTypeExpression ||
+                            (!isContextTokenValueLocation(contextToken) &&
+                                (ts.isPartOfTypeNode(location) || isContextTokenTypeLocation(contextToken)))) {
+                            // Its a type, but you can reach it by namespace.type as well
+                            return symbolCanbeReferencedAtTypeLocation(symbol);
+                        }
+                    }
+                    // expressions are value space (which includes the value namespaces)
+                    return !!(symbol.flags & 107455 /* Value */);
+                });
+            }
+            function isContextTokenValueLocation(contextToken) {
+                return contextToken &&
+                    contextToken.kind === 103 /* TypeOfKeyword */ &&
+                    contextToken.parent.kind === 162 /* TypeQuery */;
+            }
+            function isContextTokenTypeLocation(contextToken) {
+                if (contextToken) {
+                    var parentKind = contextToken.parent.kind;
+                    switch (contextToken.kind) {
+                        case 56 /* ColonToken */:
+                            return parentKind === 149 /* PropertyDeclaration */ ||
+                                parentKind === 148 /* PropertySignature */ ||
+                                parentKind === 146 /* Parameter */ ||
+                                parentKind === 226 /* VariableDeclaration */ ||
+                                ts.isFunctionLikeKind(parentKind);
+                        case 58 /* EqualsToken */:
+                            return parentKind === 231 /* TypeAliasDeclaration */;
+                        case 118 /* AsKeyword */:
+                            return parentKind === 202 /* AsExpression */;
+                    }
+                }
+            }
+            function symbolCanbeReferencedAtTypeLocation(symbol) {
+                // This is an alias, follow what it aliases
+                if (symbol && symbol.flags & 8388608 /* Alias */) {
+                    symbol = typeChecker.getAliasedSymbol(symbol);
+                }
+                if (symbol.flags & 793064 /* Type */) {
+                    return true;
+                }
+                if (symbol.flags & (512 /* ValueModule */ | 1024 /* NamespaceModule */)) {
+                    var exportedSymbols = typeChecker.getExportsOfModule(symbol);
+                    // If the exported symbols contains type,
+                    // symbol can be referenced at locations where type is allowed
+                    return ts.forEach(exportedSymbols, symbolCanbeReferencedAtTypeLocation);
+                }
+            }
             /**
              * Finds the first node that "embraces" the position, so that one may
              * accurately aggregate locals from the closest containing scope.
@@ -64362,15 +76875,15 @@ var ts;
                 return result;
             }
             function isInJsxText(contextToken) {
-                if (contextToken.kind === 244 /* JsxText */) {
+                if (contextToken.kind === 10 /* JsxText */) {
                     return true;
                 }
-                if (contextToken.kind === 27 /* GreaterThanToken */ && contextToken.parent) {
-                    if (contextToken.parent.kind === 243 /* JsxOpeningElement */) {
+                if (contextToken.kind === 29 /* GreaterThanToken */ && contextToken.parent) {
+                    if (contextToken.parent.kind === 251 /* JsxOpeningElement */) {
                         return true;
                     }
-                    if (contextToken.parent.kind === 245 /* JsxClosingElement */ || contextToken.parent.kind === 242 /* JsxSelfClosingElement */) {
-                        return contextToken.parent.parent && contextToken.parent.parent.kind === 241 /* JsxElement */;
+                    if (contextToken.parent.kind === 252 /* JsxClosingElement */ || contextToken.parent.kind === 250 /* JsxSelfClosingElement */) {
+                        return contextToken.parent.parent && contextToken.parent.parent.kind === 249 /* JsxElement */;
                     }
                 }
                 return false;
@@ -64379,41 +76892,41 @@ var ts;
                 if (previousToken) {
                     var containingNodeKind = previousToken.parent.kind;
                     switch (previousToken.kind) {
-                        case 24 /* CommaToken */:
-                            return containingNodeKind === 174 /* CallExpression */ // func( a, |
-                                || containingNodeKind === 148 /* Constructor */ // constructor( a, |   /* public, protected, private keywords are allowed here, so show completion */
-                                || containingNodeKind === 175 /* NewExpression */ // new C(a, |
-                                || containingNodeKind === 170 /* ArrayLiteralExpression */ // [a, |
-                                || containingNodeKind === 187 /* BinaryExpression */ // const x = (a, |
-                                || containingNodeKind === 156 /* FunctionType */; // var x: (s: string, list|
-                        case 17 /* OpenParenToken */:
-                            return containingNodeKind === 174 /* CallExpression */ // func( |
-                                || containingNodeKind === 148 /* Constructor */ // constructor( |
-                                || containingNodeKind === 175 /* NewExpression */ // new C(a|
-                                || containingNodeKind === 178 /* ParenthesizedExpression */ // const x = (a|
-                                || containingNodeKind === 164 /* ParenthesizedType */; // function F(pred: (a| /* this can become an arrow function, where 'a' is the argument */
-                        case 19 /* OpenBracketToken */:
-                            return containingNodeKind === 170 /* ArrayLiteralExpression */ // [ |
-                                || containingNodeKind === 153 /* IndexSignature */ // [ | : string ]
-                                || containingNodeKind === 140 /* ComputedPropertyName */; // [ |    /* this can become an index signature */
-                        case 125 /* ModuleKeyword */: // module |
-                        case 126 /* NamespaceKeyword */:
+                        case 26 /* CommaToken */:
+                            return containingNodeKind === 181 /* CallExpression */ // func( a, |
+                                || containingNodeKind === 152 /* Constructor */ // constructor( a, |   /* public, protected, private keywords are allowed here, so show completion */
+                                || containingNodeKind === 182 /* NewExpression */ // new C(a, |
+                                || containingNodeKind === 177 /* ArrayLiteralExpression */ // [a, |
+                                || containingNodeKind === 194 /* BinaryExpression */ // const x = (a, |
+                                || containingNodeKind === 160 /* FunctionType */; // var x: (s: string, list|
+                        case 19 /* OpenParenToken */:
+                            return containingNodeKind === 181 /* CallExpression */ // func( |
+                                || containingNodeKind === 152 /* Constructor */ // constructor( |
+                                || containingNodeKind === 182 /* NewExpression */ // new C(a|
+                                || containingNodeKind === 185 /* ParenthesizedExpression */ // const x = (a|
+                                || containingNodeKind === 168 /* ParenthesizedType */; // function F(pred: (a| /* this can become an arrow function, where 'a' is the argument */
+                        case 21 /* OpenBracketToken */:
+                            return containingNodeKind === 177 /* ArrayLiteralExpression */ // [ |
+                                || containingNodeKind === 157 /* IndexSignature */ // [ | : string ]
+                                || containingNodeKind === 144 /* ComputedPropertyName */; // [ |    /* this can become an index signature */
+                        case 128 /* ModuleKeyword */: // module |
+                        case 129 /* NamespaceKeyword */:
                             return true;
-                        case 21 /* DotToken */:
-                            return containingNodeKind === 225 /* ModuleDeclaration */; // module A.|
-                        case 15 /* OpenBraceToken */:
-                            return containingNodeKind === 221 /* ClassDeclaration */; // class A{ |
-                        case 56 /* EqualsToken */:
-                            return containingNodeKind === 218 /* VariableDeclaration */ // const x = a|
-                                || containingNodeKind === 187 /* BinaryExpression */; // x = a|
-                        case 12 /* TemplateHead */:
-                            return containingNodeKind === 189 /* TemplateExpression */; // `aa ${|
-                        case 13 /* TemplateMiddle */:
-                            return containingNodeKind === 197 /* TemplateSpan */; // `aa ${10} dd ${|
-                        case 112 /* PublicKeyword */:
-                        case 110 /* PrivateKeyword */:
-                        case 111 /* ProtectedKeyword */:
-                            return containingNodeKind === 145 /* PropertyDeclaration */; // class A{ public |
+                        case 23 /* DotToken */:
+                            return containingNodeKind === 233 /* ModuleDeclaration */; // module A.|
+                        case 17 /* OpenBraceToken */:
+                            return containingNodeKind === 229 /* ClassDeclaration */; // class A{ |
+                        case 58 /* EqualsToken */:
+                            return containingNodeKind === 226 /* VariableDeclaration */ // const x = a|
+                                || containingNodeKind === 194 /* BinaryExpression */; // x = a|
+                        case 14 /* TemplateHead */:
+                            return containingNodeKind === 196 /* TemplateExpression */; // `aa ${|
+                        case 15 /* TemplateMiddle */:
+                            return containingNodeKind === 205 /* TemplateSpan */; // `aa ${10} dd ${|
+                        case 114 /* PublicKeyword */:
+                        case 112 /* PrivateKeyword */:
+                        case 113 /* ProtectedKeyword */:
+                            return containingNodeKind === 149 /* PropertyDeclaration */; // class A{ public |
                     }
                     // Previous token may have been a keyword that was converted to an identifier.
                     switch (previousToken.getText()) {
@@ -64427,7 +76940,7 @@ var ts;
             }
             function isInStringOrRegularExpressionOrTemplateLiteral(contextToken) {
                 if (contextToken.kind === 9 /* StringLiteral */
-                    || contextToken.kind === 10 /* RegularExpressionLiteral */
+                    || contextToken.kind === 12 /* RegularExpressionLiteral */
                     || ts.isTemplateLiteralKind(contextToken.kind)) {
                     var start_3 = contextToken.getStart();
                     var end = contextToken.getEnd();
@@ -64440,7 +76953,7 @@ var ts;
                     }
                     if (position === end) {
                         return !!contextToken.isUnterminated
-                            || contextToken.kind === 10 /* RegularExpressionLiteral */;
+                            || contextToken.kind === 12 /* RegularExpressionLiteral */;
                     }
                 }
                 return false;
@@ -64454,53 +76967,48 @@ var ts;
             function tryGetObjectLikeCompletionSymbols(objectLikeContainer) {
                 // We're looking up possible property names from contextual/inferred/declared type.
                 isMemberCompletion = true;
-                var typeForObject;
+                var typeMembers;
                 var existingMembers;
-                if (objectLikeContainer.kind === 171 /* ObjectLiteralExpression */) {
+                if (objectLikeContainer.kind === 178 /* ObjectLiteralExpression */) {
                     // We are completing on contextual types, but may also include properties
                     // other than those within the declared type.
                     isNewIdentifierLocation = true;
-                    // If the object literal is being assigned to something of type 'null | { hello: string }',
-                    // it clearly isn't trying to satisfy the 'null' type. So we grab the non-nullable type if possible.
-                    typeForObject = typeChecker.getContextualType(objectLikeContainer);
-                    typeForObject = typeForObject && typeForObject.getNonNullableType();
+                    var typeForObject = typeChecker.getContextualType(objectLikeContainer);
+                    if (!typeForObject)
+                        return false;
+                    typeMembers = typeChecker.getAllPossiblePropertiesOfType(typeForObject);
                     existingMembers = objectLikeContainer.properties;
                 }
-                else if (objectLikeContainer.kind === 167 /* ObjectBindingPattern */) {
+                else {
+                    ts.Debug.assert(objectLikeContainer.kind === 174 /* ObjectBindingPattern */);
                     // We are *only* completing on properties from the type being destructured.
                     isNewIdentifierLocation = false;
                     var rootDeclaration = ts.getRootDeclaration(objectLikeContainer.parent);
-                    if (ts.isVariableLike(rootDeclaration)) {
-                        // We don't want to complete using the type acquired by the shape
-                        // of the binding pattern; we are only interested in types acquired
-                        // through type declaration or inference.
-                        // Also proceed if rootDeclaration is a parameter and if its containing function expression/arrow function is contextually typed -
-                        // type of parameter will flow in from the contextual type of the function
-                        var canGetType = !!(rootDeclaration.initializer || rootDeclaration.type);
-                        if (!canGetType && rootDeclaration.kind === 142 /* Parameter */) {
-                            if (ts.isExpression(rootDeclaration.parent)) {
-                                canGetType = !!typeChecker.getContextualType(rootDeclaration.parent);
-                            }
-                            else if (rootDeclaration.parent.kind === 147 /* MethodDeclaration */ || rootDeclaration.parent.kind === 150 /* SetAccessor */) {
-                                canGetType = ts.isExpression(rootDeclaration.parent.parent) && !!typeChecker.getContextualType(rootDeclaration.parent.parent);
-                            }
-                        }
-                        if (canGetType) {
-                            typeForObject = typeChecker.getTypeAtLocation(objectLikeContainer);
-                            existingMembers = objectLikeContainer.elements;
-                        }
-                    }
-                    else {
-                        ts.Debug.fail("Root declaration is not variable-like.");
+                    if (!ts.isVariableLike(rootDeclaration))
+                        throw ts.Debug.fail("Root declaration is not variable-like.");
+                    // We don't want to complete using the type acquired by the shape
+                    // of the binding pattern; we are only interested in types acquired
+                    // through type declaration or inference.
+                    // Also proceed if rootDeclaration is a parameter and if its containing function expression/arrow function is contextually typed -
+                    // type of parameter will flow in from the contextual type of the function
+                    var canGetType = rootDeclaration.initializer || rootDeclaration.type || rootDeclaration.parent.parent.kind === 216 /* ForOfStatement */;
+                    if (!canGetType && rootDeclaration.kind === 146 /* Parameter */) {
+                        if (ts.isExpression(rootDeclaration.parent)) {
+                            canGetType = !!typeChecker.getContextualType(rootDeclaration.parent);
+                        }
+                        else if (rootDeclaration.parent.kind === 151 /* MethodDeclaration */ || rootDeclaration.parent.kind === 154 /* SetAccessor */) {
+                            canGetType = ts.isExpression(rootDeclaration.parent.parent) && !!typeChecker.getContextualType(rootDeclaration.parent.parent);
+                        }
+                    }
+                    if (canGetType) {
+                        var typeForObject = typeChecker.getTypeAtLocation(objectLikeContainer);
+                        if (!typeForObject)
+                            return false;
+                        // In a binding pattern, get only known properties. Everywhere else we will get all possible properties.
+                        typeMembers = typeChecker.getPropertiesOfType(typeForObject);
+                        existingMembers = objectLikeContainer.elements;
                     }
                 }
-                else {
-                    ts.Debug.fail("Expected object literal or binding pattern, got " + objectLikeContainer.kind);
-                }
-                if (!typeForObject) {
-                    return false;
-                }
-                var typeMembers = typeChecker.getPropertiesOfType(typeForObject);
                 if (typeMembers && typeMembers.length > 0) {
                     // Add filtered items to the completion list
                     symbols = filterObjectMembersList(typeMembers, existingMembers);
@@ -64523,9 +77031,9 @@ var ts;
              * @returns true if 'symbols' was successfully populated; false otherwise.
              */
             function tryGetImportOrExportClauseCompletionSymbols(namedImportsOrExports) {
-                var declarationKind = namedImportsOrExports.kind === 233 /* NamedImports */ ?
-                    230 /* ImportDeclaration */ :
-                    236 /* ExportDeclaration */;
+                var declarationKind = namedImportsOrExports.kind === 241 /* NamedImports */ ?
+                    238 /* ImportDeclaration */ :
+                    244 /* ExportDeclaration */;
                 var importOrExportDeclaration = ts.getAncestor(namedImportsOrExports, declarationKind);
                 var moduleSpecifier = importOrExportDeclaration.moduleSpecifier;
                 if (!moduleSpecifier) {
@@ -64533,14 +77041,62 @@ var ts;
                 }
                 isMemberCompletion = true;
                 isNewIdentifierLocation = false;
-                var exports;
-                var moduleSpecifierSymbol = typeChecker.getSymbolAtLocation(importOrExportDeclaration.moduleSpecifier);
-                if (moduleSpecifierSymbol) {
-                    exports = typeChecker.getExportsOfModule(moduleSpecifierSymbol);
+                var moduleSpecifierSymbol = typeChecker.getSymbolAtLocation(moduleSpecifier);
+                if (!moduleSpecifierSymbol) {
+                    symbols = ts.emptyArray;
+                    return true;
                 }
-                symbols = exports ? filterNamedImportOrExportCompletionItems(exports, namedImportsOrExports.elements) : ts.emptyArray;
+                var exports = typeChecker.getExportsAndPropertiesOfModule(moduleSpecifierSymbol);
+                symbols = filterNamedImportOrExportCompletionItems(exports, namedImportsOrExports.elements);
                 return true;
             }
+            /**
+             * Aggregates relevant symbols for completion in class declaration
+             * Relevant symbols are stored in the captured 'symbols' variable.
+             */
+            function getGetClassLikeCompletionSymbols(classLikeDeclaration) {
+                // We're looking up possible property names from parent type.
+                isMemberCompletion = true;
+                // Declaring new property/method/accessor
+                isNewIdentifierLocation = true;
+                // Has keywords for class elements
+                keywordFilters = 1 /* ClassElementKeywords */;
+                var baseTypeNode = ts.getClassExtendsHeritageClauseElement(classLikeDeclaration);
+                var implementsTypeNodes = ts.getClassImplementsHeritageClauseElements(classLikeDeclaration);
+                if (baseTypeNode || implementsTypeNodes) {
+                    var classElement = contextToken.parent;
+                    var classElementModifierFlags = ts.isClassElement(classElement) && ts.getModifierFlags(classElement);
+                    // If this is context token is not something we are editing now, consider if this would lead to be modifier
+                    if (contextToken.kind === 71 /* Identifier */ && !isCurrentlyEditingNode(contextToken)) {
+                        switch (contextToken.getText()) {
+                            case "private":
+                                classElementModifierFlags = classElementModifierFlags | 8 /* Private */;
+                                break;
+                            case "static":
+                                classElementModifierFlags = classElementModifierFlags | 32 /* Static */;
+                                break;
+                        }
+                    }
+                    // No member list for private methods
+                    if (!(classElementModifierFlags & 8 /* Private */)) {
+                        var baseClassTypeToGetPropertiesFrom = void 0;
+                        if (baseTypeNode) {
+                            baseClassTypeToGetPropertiesFrom = typeChecker.getTypeAtLocation(baseTypeNode);
+                            if (classElementModifierFlags & 32 /* Static */) {
+                                // Use static class to get property symbols from
+                                baseClassTypeToGetPropertiesFrom = typeChecker.getTypeOfSymbolAtLocation(baseClassTypeToGetPropertiesFrom.symbol, classLikeDeclaration);
+                            }
+                        }
+                        var implementedInterfaceTypePropertySymbols = (classElementModifierFlags & 32 /* Static */) ?
+                            undefined :
+                            ts.flatMap(implementsTypeNodes, function (typeNode) { return typeChecker.getPropertiesOfType(typeChecker.getTypeAtLocation(typeNode)); });
+                        // List of property symbols of base type that are not private and already implemented
+                        symbols = filterClassMembersList(baseClassTypeToGetPropertiesFrom ?
+                            typeChecker.getPropertiesOfType(baseClassTypeToGetPropertiesFrom) :
+                            undefined, implementedInterfaceTypePropertySymbols, classLikeDeclaration.members, classElementModifierFlags);
+                    }
+                }
+            }
             /**
              * Returns the immediate owning object literal or binding pattern of a context token,
              * on the condition that one exists and that the context implies completion should be given.
@@ -64548,11 +77104,11 @@ var ts;
             function tryGetObjectLikeCompletionContainer(contextToken) {
                 if (contextToken) {
                     switch (contextToken.kind) {
-                        case 15 /* OpenBraceToken */: // const x = { |
-                        case 24 /* CommaToken */:
-                            var parent_18 = contextToken.parent;
-                            if (parent_18 && (parent_18.kind === 171 /* ObjectLiteralExpression */ || parent_18.kind === 167 /* ObjectBindingPattern */)) {
-                                return parent_18;
+                        case 17 /* OpenBraceToken */: // const x = { |
+                        case 26 /* CommaToken */:
+                            var parent_19 = contextToken.parent;
+                            if (ts.isObjectLiteralExpression(parent_19) || ts.isObjectBindingPattern(parent_19)) {
+                                return parent_19;
                             }
                             break;
                     }
@@ -64566,141 +77122,236 @@ var ts;
             function tryGetNamedImportsOrExportsForCompletion(contextToken) {
                 if (contextToken) {
                     switch (contextToken.kind) {
-                        case 15 /* OpenBraceToken */: // import { |
-                        case 24 /* CommaToken */:
+                        case 17 /* OpenBraceToken */: // import { |
+                        case 26 /* CommaToken */:
                             switch (contextToken.parent.kind) {
-                                case 233 /* NamedImports */:
-                                case 237 /* NamedExports */:
+                                case 241 /* NamedImports */:
+                                case 245 /* NamedExports */:
                                     return contextToken.parent;
                             }
                     }
                 }
                 return undefined;
             }
+            function isFromClassElementDeclaration(node) {
+                return ts.isClassElement(node.parent) && ts.isClassLike(node.parent.parent);
+            }
+            function isParameterOfConstructorDeclaration(node) {
+                return ts.isParameter(node) && ts.isConstructorDeclaration(node.parent);
+            }
+            function isConstructorParameterCompletion(node) {
+                return node.parent &&
+                    isParameterOfConstructorDeclaration(node.parent) &&
+                    (isConstructorParameterCompletionKeyword(node.kind) || ts.isDeclarationName(node));
+            }
+            /**
+             * Returns the immediate owning class declaration of a context token,
+             * on the condition that one exists and that the context implies completion should be given.
+             */
+            function tryGetClassLikeCompletionContainer(contextToken) {
+                if (contextToken) {
+                    switch (contextToken.kind) {
+                        case 17 /* OpenBraceToken */:
+                            if (ts.isClassLike(contextToken.parent)) {
+                                return contextToken.parent;
+                            }
+                            break;
+                        // class c {getValue(): number, | }
+                        case 26 /* CommaToken */:
+                            if (ts.isClassLike(contextToken.parent)) {
+                                return contextToken.parent;
+                            }
+                            break;
+                        // class c {getValue(): number; | }
+                        case 25 /* SemicolonToken */:
+                        // class c { method() { } | }
+                        case 18 /* CloseBraceToken */:
+                            if (ts.isClassLike(location)) {
+                                return location;
+                            }
+                            break;
+                        default:
+                            if (isFromClassElementDeclaration(contextToken) &&
+                                (isClassMemberCompletionKeyword(contextToken.kind) ||
+                                    isClassMemberCompletionKeywordText(contextToken.getText()))) {
+                                return contextToken.parent.parent;
+                            }
+                    }
+                }
+                // class c { method() { } | method2() { } }
+                if (location && location.kind === 295 /* SyntaxList */ && ts.isClassLike(location.parent)) {
+                    return location.parent;
+                }
+                return undefined;
+            }
+            /**
+             * Returns the immediate owning class declaration of a context token,
+             * on the condition that one exists and that the context implies completion should be given.
+             */
+            function tryGetConstructorLikeCompletionContainer(contextToken) {
+                if (contextToken) {
+                    switch (contextToken.kind) {
+                        case 19 /* OpenParenToken */:
+                        case 26 /* CommaToken */:
+                            return ts.isConstructorDeclaration(contextToken.parent) && contextToken.parent;
+                        default:
+                            if (isConstructorParameterCompletion(contextToken)) {
+                                return contextToken.parent.parent;
+                            }
+                    }
+                }
+                return undefined;
+            }
             function tryGetContainingJsxElement(contextToken) {
                 if (contextToken) {
-                    var parent_19 = contextToken.parent;
+                    var parent_20 = contextToken.parent;
                     switch (contextToken.kind) {
-                        case 26 /* LessThanSlashToken */:
-                        case 39 /* SlashToken */:
-                        case 69 /* Identifier */:
-                        case 246 /* JsxAttribute */:
-                        case 247 /* JsxSpreadAttribute */:
-                            if (parent_19 && (parent_19.kind === 242 /* JsxSelfClosingElement */ || parent_19.kind === 243 /* JsxOpeningElement */)) {
-                                return parent_19;
+                        case 28 /* LessThanSlashToken */:
+                        case 41 /* SlashToken */:
+                        case 71 /* Identifier */:
+                        case 179 /* PropertyAccessExpression */:
+                        case 254 /* JsxAttributes */:
+                        case 253 /* JsxAttribute */:
+                        case 255 /* JsxSpreadAttribute */:
+                            if (parent_20 && (parent_20.kind === 250 /* JsxSelfClosingElement */ || parent_20.kind === 251 /* JsxOpeningElement */)) {
+                                return parent_20;
                             }
-                            else if (parent_19.kind === 246 /* JsxAttribute */) {
-                                return parent_19.parent;
+                            else if (parent_20.kind === 253 /* JsxAttribute */) {
+                                // Currently we parse JsxOpeningLikeElement as:
+                                //      JsxOpeningLikeElement
+                                //          attributes: JsxAttributes
+                                //             properties: NodeArray<JsxAttributeLike>
+                                return parent_20.parent.parent;
                             }
                             break;
                         // The context token is the closing } or " of an attribute, which means
                         // its parent is a JsxExpression, whose parent is a JsxAttribute,
                         // whose parent is a JsxOpeningLikeElement
                         case 9 /* StringLiteral */:
-                            if (parent_19 && ((parent_19.kind === 246 /* JsxAttribute */) || (parent_19.kind === 247 /* JsxSpreadAttribute */))) {
-                                return parent_19.parent;
+                            if (parent_20 && ((parent_20.kind === 253 /* JsxAttribute */) || (parent_20.kind === 255 /* JsxSpreadAttribute */))) {
+                                // Currently we parse JsxOpeningLikeElement as:
+                                //      JsxOpeningLikeElement
+                                //          attributes: JsxAttributes
+                                //             properties: NodeArray<JsxAttributeLike>
+                                return parent_20.parent.parent;
                             }
                             break;
-                        case 16 /* CloseBraceToken */:
-                            if (parent_19 &&
-                                parent_19.kind === 248 /* JsxExpression */ &&
-                                parent_19.parent &&
-                                (parent_19.parent.kind === 246 /* JsxAttribute */)) {
-                                return parent_19.parent.parent;
+                        case 18 /* CloseBraceToken */:
+                            if (parent_20 &&
+                                parent_20.kind === 256 /* JsxExpression */ &&
+                                parent_20.parent && parent_20.parent.kind === 253 /* JsxAttribute */) {
+                                // Currently we parse JsxOpeningLikeElement as:
+                                //      JsxOpeningLikeElement
+                                //          attributes: JsxAttributes
+                                //             properties: NodeArray<JsxAttributeLike>
+                                //                  each JsxAttribute can have initializer as JsxExpression
+                                return parent_20.parent.parent.parent;
                             }
-                            if (parent_19 && parent_19.kind === 247 /* JsxSpreadAttribute */) {
-                                return parent_19.parent;
+                            if (parent_20 && parent_20.kind === 255 /* JsxSpreadAttribute */) {
+                                // Currently we parse JsxOpeningLikeElement as:
+                                //      JsxOpeningLikeElement
+                                //          attributes: JsxAttributes
+                                //             properties: NodeArray<JsxAttributeLike>
+                                return parent_20.parent.parent;
                             }
                             break;
                     }
                 }
                 return undefined;
             }
-            function isFunction(kind) {
-                switch (kind) {
-                    case 179 /* FunctionExpression */:
-                    case 180 /* ArrowFunction */:
-                    case 220 /* FunctionDeclaration */:
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                    case 151 /* CallSignature */:
-                    case 152 /* ConstructSignature */:
-                    case 153 /* IndexSignature */:
-                        return true;
-                }
-                return false;
-            }
             /**
              * @returns true if we are certain that the currently edited location must define a new location; false otherwise.
              */
             function isSolelyIdentifierDefinitionLocation(contextToken) {
                 var containingNodeKind = contextToken.parent.kind;
                 switch (contextToken.kind) {
-                    case 24 /* CommaToken */:
-                        return containingNodeKind === 218 /* VariableDeclaration */ ||
-                            containingNodeKind === 219 /* VariableDeclarationList */ ||
-                            containingNodeKind === 200 /* VariableStatement */ ||
-                            containingNodeKind === 224 /* EnumDeclaration */ ||
-                            isFunction(containingNodeKind) ||
-                            containingNodeKind === 221 /* ClassDeclaration */ ||
-                            containingNodeKind === 192 /* ClassExpression */ ||
-                            containingNodeKind === 222 /* InterfaceDeclaration */ ||
-                            containingNodeKind === 168 /* ArrayBindingPattern */ ||
-                            containingNodeKind === 223 /* TypeAliasDeclaration */; // type Map, K, |
-                    case 21 /* DotToken */:
-                        return containingNodeKind === 168 /* ArrayBindingPattern */; // var [.|
-                    case 54 /* ColonToken */:
-                        return containingNodeKind === 169 /* BindingElement */; // var {x :html|
-                    case 19 /* OpenBracketToken */:
-                        return containingNodeKind === 168 /* ArrayBindingPattern */; // var [x|
-                    case 17 /* OpenParenToken */:
-                        return containingNodeKind === 252 /* CatchClause */ ||
-                            isFunction(containingNodeKind);
-                    case 15 /* OpenBraceToken */:
-                        return containingNodeKind === 224 /* EnumDeclaration */ ||
-                            containingNodeKind === 222 /* InterfaceDeclaration */ ||
-                            containingNodeKind === 159 /* TypeLiteral */; // const x : { |
-                    case 23 /* SemicolonToken */:
-                        return containingNodeKind === 144 /* PropertySignature */ &&
+                    case 26 /* CommaToken */:
+                        return containingNodeKind === 226 /* VariableDeclaration */ ||
+                            containingNodeKind === 227 /* VariableDeclarationList */ ||
+                            containingNodeKind === 208 /* VariableStatement */ ||
+                            containingNodeKind === 232 /* EnumDeclaration */ ||
+                            isFunctionLikeButNotConstructor(containingNodeKind) ||
+                            containingNodeKind === 230 /* InterfaceDeclaration */ ||
+                            containingNodeKind === 175 /* ArrayBindingPattern */ ||
+                            containingNodeKind === 231 /* TypeAliasDeclaration */ ||
+                            // class A<T, |
+                            // var C = class D<T, |
+                            (ts.isClassLike(contextToken.parent) &&
+                                contextToken.parent.typeParameters &&
+                                contextToken.parent.typeParameters.end >= contextToken.pos);
+                    case 23 /* DotToken */:
+                        return containingNodeKind === 175 /* ArrayBindingPattern */; // var [.|
+                    case 56 /* ColonToken */:
+                        return containingNodeKind === 176 /* BindingElement */; // var {x :html|
+                    case 21 /* OpenBracketToken */:
+                        return containingNodeKind === 175 /* ArrayBindingPattern */; // var [x|
+                    case 19 /* OpenParenToken */:
+                        return containingNodeKind === 260 /* CatchClause */ ||
+                            isFunctionLikeButNotConstructor(containingNodeKind);
+                    case 17 /* OpenBraceToken */:
+                        return containingNodeKind === 232 /* EnumDeclaration */ ||
+                            containingNodeKind === 230 /* InterfaceDeclaration */ ||
+                            containingNodeKind === 163 /* TypeLiteral */; // const x : { |
+                    case 25 /* SemicolonToken */:
+                        return containingNodeKind === 148 /* PropertySignature */ &&
                             contextToken.parent && contextToken.parent.parent &&
-                            (contextToken.parent.parent.kind === 222 /* InterfaceDeclaration */ ||
-                                contextToken.parent.parent.kind === 159 /* TypeLiteral */); // const x : { a; |
-                    case 25 /* LessThanToken */:
-                        return containingNodeKind === 221 /* ClassDeclaration */ ||
-                            containingNodeKind === 192 /* ClassExpression */ ||
-                            containingNodeKind === 222 /* InterfaceDeclaration */ ||
-                            containingNodeKind === 223 /* TypeAliasDeclaration */ ||
-                            isFunction(containingNodeKind);
-                    case 113 /* StaticKeyword */:
-                        return containingNodeKind === 145 /* PropertyDeclaration */;
-                    case 22 /* DotDotDotToken */:
-                        return containingNodeKind === 142 /* Parameter */ ||
+                            (contextToken.parent.parent.kind === 230 /* InterfaceDeclaration */ ||
+                                contextToken.parent.parent.kind === 163 /* TypeLiteral */); // const x : { a; |
+                    case 27 /* LessThanToken */:
+                        return containingNodeKind === 229 /* ClassDeclaration */ ||
+                            containingNodeKind === 199 /* ClassExpression */ ||
+                            containingNodeKind === 230 /* InterfaceDeclaration */ ||
+                            containingNodeKind === 231 /* TypeAliasDeclaration */ ||
+                            ts.isFunctionLikeKind(containingNodeKind);
+                    case 115 /* StaticKeyword */:
+                        return containingNodeKind === 149 /* PropertyDeclaration */ && !ts.isClassLike(contextToken.parent.parent);
+                    case 24 /* DotDotDotToken */:
+                        return containingNodeKind === 146 /* Parameter */ ||
                             (contextToken.parent && contextToken.parent.parent &&
-                                contextToken.parent.parent.kind === 168 /* ArrayBindingPattern */); // var [...z|
-                    case 112 /* PublicKeyword */:
-                    case 110 /* PrivateKeyword */:
-                    case 111 /* ProtectedKeyword */:
-                        return containingNodeKind === 142 /* Parameter */;
-                    case 116 /* AsKeyword */:
-                        return containingNodeKind === 234 /* ImportSpecifier */ ||
-                            containingNodeKind === 238 /* ExportSpecifier */ ||
-                            containingNodeKind === 232 /* NamespaceImport */;
-                    case 73 /* ClassKeyword */:
-                    case 81 /* EnumKeyword */:
-                    case 107 /* InterfaceKeyword */:
-                    case 87 /* FunctionKeyword */:
-                    case 102 /* VarKeyword */:
-                    case 123 /* GetKeyword */:
-                    case 131 /* SetKeyword */:
-                    case 89 /* ImportKeyword */:
-                    case 108 /* LetKeyword */:
-                    case 74 /* ConstKeyword */:
-                    case 114 /* YieldKeyword */:
-                    case 134 /* TypeKeyword */:
+                                contextToken.parent.parent.kind === 175 /* ArrayBindingPattern */); // var [...z|
+                    case 114 /* PublicKeyword */:
+                    case 112 /* PrivateKeyword */:
+                    case 113 /* ProtectedKeyword */:
+                        return containingNodeKind === 146 /* Parameter */ && !ts.isConstructorDeclaration(contextToken.parent.parent);
+                    case 118 /* AsKeyword */:
+                        return containingNodeKind === 242 /* ImportSpecifier */ ||
+                            containingNodeKind === 246 /* ExportSpecifier */ ||
+                            containingNodeKind === 240 /* NamespaceImport */;
+                    case 125 /* GetKeyword */:
+                    case 135 /* SetKeyword */:
+                        if (isFromClassElementDeclaration(contextToken)) {
+                            return false;
+                        }
+                    // falls through
+                    case 75 /* ClassKeyword */:
+                    case 83 /* EnumKeyword */:
+                    case 109 /* InterfaceKeyword */:
+                    case 89 /* FunctionKeyword */:
+                    case 104 /* VarKeyword */:
+                    case 91 /* ImportKeyword */:
+                    case 110 /* LetKeyword */:
+                    case 76 /* ConstKeyword */:
+                    case 116 /* YieldKeyword */:
+                    case 138 /* TypeKeyword */:
                         return true;
                 }
+                // If the previous token is keyword correspoding to class member completion keyword
+                // there will be completion available here
+                if (isClassMemberCompletionKeywordText(contextToken.getText()) &&
+                    isFromClassElementDeclaration(contextToken)) {
+                    return false;
+                }
+                if (isConstructorParameterCompletion(contextToken)) {
+                    // constructor parameter completion is available only if
+                    // - its modifier of the constructor parameter or
+                    // - its name of the parameter and not being edited
+                    // eg. constructor(a |<- this shouldnt show completion
+                    if (!ts.isIdentifier(contextToken) ||
+                        isConstructorParameterCompletionKeywordText(contextToken.getText()) ||
+                        isCurrentlyEditingNode(contextToken)) {
+                        return false;
+                    }
+                }
                 // Previous token may have been a keyword that was converted to an identifier.
                 switch (contextToken.getText()) {
                     case "abstract":
@@ -64720,7 +77371,10 @@ var ts;
                     case "yield":
                         return true;
                 }
-                return false;
+                return ts.isDeclarationName(contextToken) && !ts.isJsxAttribute(contextToken.parent);
+            }
+            function isFunctionLikeButNotConstructor(kind) {
+                return ts.isFunctionLikeKind(kind) && kind !== 152 /* Constructor */;
             }
             function isDotOfNumericLiteral(contextToken) {
                 if (contextToken.kind === 8 /* NumericLiteral */) {
@@ -64743,16 +77397,16 @@ var ts;
                 for (var _i = 0, namedImportsOrExports_1 = namedImportsOrExports; _i < namedImportsOrExports_1.length; _i++) {
                     var element = namedImportsOrExports_1[_i];
                     // If this is the current item we are editing right now, do not filter it out
-                    if (element.getStart() <= position && position <= element.getEnd()) {
+                    if (isCurrentlyEditingNode(element)) {
                         continue;
                     }
-                    var name_50 = element.propertyName || element.name;
-                    existingImportsOrExports[name_50.text] = true;
+                    var name_61 = element.propertyName || element.name;
+                    existingImportsOrExports.set(name_61.text, true);
                 }
-                if (!ts.someProperties(existingImportsOrExports)) {
+                if (existingImportsOrExports.size === 0) {
                     return ts.filter(exportsOfModule, function (e) { return e.name !== "default"; });
                 }
-                return ts.filter(exportsOfModule, function (e) { return e.name !== "default" && !existingImportsOrExports[e.name]; });
+                return ts.filter(exportsOfModule, function (e) { return e.name !== "default" && !existingImportsOrExports.get(e.name); });
             }
             /**
              * Filters out completion suggestions for named imports or exports.
@@ -64768,20 +77422,22 @@ var ts;
                 for (var _i = 0, existingMembers_1 = existingMembers; _i < existingMembers_1.length; _i++) {
                     var m = existingMembers_1[_i];
                     // Ignore omitted expressions for missing members
-                    if (m.kind !== 253 /* PropertyAssignment */ &&
-                        m.kind !== 254 /* ShorthandPropertyAssignment */ &&
-                        m.kind !== 169 /* BindingElement */ &&
-                        m.kind !== 147 /* MethodDeclaration */) {
+                    if (m.kind !== 261 /* PropertyAssignment */ &&
+                        m.kind !== 262 /* ShorthandPropertyAssignment */ &&
+                        m.kind !== 176 /* BindingElement */ &&
+                        m.kind !== 151 /* MethodDeclaration */ &&
+                        m.kind !== 153 /* GetAccessor */ &&
+                        m.kind !== 154 /* SetAccessor */) {
                         continue;
                     }
                     // If this is the current item we are editing right now, do not filter it out
-                    if (m.getStart() <= position && position <= m.getEnd()) {
+                    if (isCurrentlyEditingNode(m)) {
                         continue;
                     }
                     var existingName = void 0;
-                    if (m.kind === 169 /* BindingElement */ && m.propertyName) {
+                    if (m.kind === 176 /* BindingElement */ && m.propertyName) {
                         // include only identifiers in completion list
-                        if (m.propertyName.kind === 69 /* Identifier */) {
+                        if (m.propertyName.kind === 71 /* Identifier */) {
                             existingName = m.propertyName.text;
                         }
                     }
@@ -64789,11 +77445,54 @@ var ts;
                         // TODO(jfreeman): Account for computed property name
                         // NOTE: if one only performs this step when m.name is an identifier,
                         // things like '__proto__' are not filtered out.
-                        existingName = m.name.text;
+                        existingName = ts.getNameOfDeclaration(m).text;
+                    }
+                    existingMemberNames.set(existingName, true);
+                }
+                return ts.filter(contextualMemberSymbols, function (m) { return !existingMemberNames.get(m.name); });
+            }
+            /**
+             * Filters out completion suggestions for class elements.
+             *
+             * @returns Symbols to be suggested in an class element depending on existing memebers and symbol flags
+             */
+            function filterClassMembersList(baseSymbols, implementingTypeSymbols, existingMembers, currentClassElementModifierFlags) {
+                var existingMemberNames = ts.createMap();
+                for (var _i = 0, existingMembers_2 = existingMembers; _i < existingMembers_2.length; _i++) {
+                    var m = existingMembers_2[_i];
+                    // Ignore omitted expressions for missing members
+                    if (m.kind !== 149 /* PropertyDeclaration */ &&
+                        m.kind !== 151 /* MethodDeclaration */ &&
+                        m.kind !== 153 /* GetAccessor */ &&
+                        m.kind !== 154 /* SetAccessor */) {
+                        continue;
+                    }
+                    // If this is the current item we are editing right now, do not filter it out
+                    if (isCurrentlyEditingNode(m)) {
+                        continue;
+                    }
+                    // Dont filter member even if the name matches if it is declared private in the list
+                    if (ts.hasModifier(m, 8 /* Private */)) {
+                        continue;
+                    }
+                    // do not filter it out if the static presence doesnt match
+                    var mIsStatic = ts.hasModifier(m, 32 /* Static */);
+                    var currentElementIsStatic = !!(currentClassElementModifierFlags & 32 /* Static */);
+                    if ((mIsStatic && !currentElementIsStatic) ||
+                        (!mIsStatic && currentElementIsStatic)) {
+                        continue;
+                    }
+                    var existingName = ts.getPropertyNameForPropertyNameNode(m.name);
+                    if (existingName) {
+                        existingMemberNames.set(existingName, true);
                     }
-                    existingMemberNames[existingName] = true;
                 }
-                return ts.filter(contextualMemberSymbols, function (m) { return !existingMemberNames[m.name]; });
+                return ts.concatenate(ts.filter(baseSymbols, function (baseProperty) { return isValidProperty(baseProperty, 8 /* Private */); }), ts.filter(implementingTypeSymbols, function (implementingProperty) { return isValidProperty(implementingProperty, 24 /* NonPublicAccessibilityModifier */); }));
+                function isValidProperty(propertySymbol, inValidModifierFlags) {
+                    return !existingMemberNames.get(propertySymbol.name) &&
+                        propertySymbol.getDeclarations() &&
+                        !(ts.getDeclarationModifierFlagsFromSymbol(propertySymbol) & inValidModifierFlags);
+                }
             }
             /**
              * Filters out completion suggestions from 'symbols' according to existing JSX attributes.
@@ -64806,14 +77505,17 @@ var ts;
                 for (var _i = 0, attributes_1 = attributes; _i < attributes_1.length; _i++) {
                     var attr = attributes_1[_i];
                     // If this is the current item we are editing right now, do not filter it out
-                    if (attr.getStart() <= position && position <= attr.getEnd()) {
+                    if (isCurrentlyEditingNode(attr)) {
                         continue;
                     }
-                    if (attr.kind === 246 /* JsxAttribute */) {
-                        seenNames[attr.name.text] = true;
+                    if (attr.kind === 253 /* JsxAttribute */) {
+                        seenNames.set(attr.name.text, true);
                     }
                 }
-                return ts.filter(symbols, function (a) { return !seenNames[a.name]; });
+                return ts.filter(symbols, function (a) { return !seenNames.get(a.name); });
+            }
+            function isCurrentlyEditingNode(node) {
+                return node.getStart() <= position && position <= node.getEnd();
             }
         }
         /**
@@ -64858,52 +77560,107 @@ var ts;
             return name;
         }
         // A cache of completion entries for keywords, these do not change between sessions
-        var keywordCompletions = [];
-        for (var i = 70 /* FirstKeyword */; i <= 138 /* LastKeyword */; i++) {
-            keywordCompletions.push({
-                name: ts.tokenToString(i),
-                kind: ts.ScriptElementKind.keyword,
-                kindModifiers: ts.ScriptElementKindModifier.none,
-                sortText: "0"
-            });
+        var _keywordCompletions = [];
+        function getKeywordCompletions(keywordFilter) {
+            var completions = _keywordCompletions[keywordFilter];
+            if (completions) {
+                return completions;
+            }
+            return _keywordCompletions[keywordFilter] = generateKeywordCompletions(keywordFilter);
+            function generateKeywordCompletions(keywordFilter) {
+                switch (keywordFilter) {
+                    case 0 /* None */:
+                        return getAllKeywordCompletions();
+                    case 1 /* ClassElementKeywords */:
+                        return getFilteredKeywordCompletions(isClassMemberCompletionKeywordText);
+                    case 2 /* ConstructorParameterKeywords */:
+                        return getFilteredKeywordCompletions(isConstructorParameterCompletionKeywordText);
+                }
+            }
+            function getAllKeywordCompletions() {
+                var allKeywordsCompletions = [];
+                for (var i = 72 /* FirstKeyword */; i <= 142 /* LastKeyword */; i++) {
+                    allKeywordsCompletions.push({
+                        name: ts.tokenToString(i),
+                        kind: "keyword" /* keyword */,
+                        kindModifiers: "" /* none */,
+                        sortText: "0"
+                    });
+                }
+                return allKeywordsCompletions;
+            }
+            function getFilteredKeywordCompletions(filterFn) {
+                return ts.filter(getKeywordCompletions(0 /* None */), function (entry) { return filterFn(entry.name); });
+            }
         }
-        /**
-         * Matches a triple slash reference directive with an incomplete string literal for its path. Used
-         * to determine if the caret is currently within the string literal and capture the literal fragment
-         * for completions.
-         * For example, this matches /// <reference path="fragment
-         */
-        var tripleSlashDirectiveFragmentRegex = /^(\/\/\/\s*<reference\s+(path|types)\s*=\s*(?:'|"))([^\3]*)$/;
-        var nodeModulesDependencyKeys = ["dependencies", "devDependencies", "peerDependencies", "optionalDependencies"];
-        function tryGetDirectories(host, directoryName) {
-            return tryIOAndConsumeErrors(host, host.getDirectories, directoryName);
+        function isClassMemberCompletionKeyword(kind) {
+            switch (kind) {
+                case 114 /* PublicKeyword */:
+                case 113 /* ProtectedKeyword */:
+                case 112 /* PrivateKeyword */:
+                case 117 /* AbstractKeyword */:
+                case 115 /* StaticKeyword */:
+                case 123 /* ConstructorKeyword */:
+                case 131 /* ReadonlyKeyword */:
+                case 125 /* GetKeyword */:
+                case 135 /* SetKeyword */:
+                case 120 /* AsyncKeyword */:
+                    return true;
+            }
+        }
+        function isClassMemberCompletionKeywordText(text) {
+            return isClassMemberCompletionKeyword(ts.stringToToken(text));
+        }
+        function isConstructorParameterCompletionKeyword(kind) {
+            switch (kind) {
+                case 114 /* PublicKeyword */:
+                case 112 /* PrivateKeyword */:
+                case 113 /* ProtectedKeyword */:
+                case 131 /* ReadonlyKeyword */:
+                    return true;
+            }
         }
-        function tryReadDirectory(host, path, extensions, exclude, include) {
-            return tryIOAndConsumeErrors(host, host.readDirectory, path, extensions, exclude, include);
+        function isConstructorParameterCompletionKeywordText(text) {
+            return isConstructorParameterCompletionKeyword(ts.stringToToken(text));
         }
-        function tryReadFile(host, path) {
-            return tryIOAndConsumeErrors(host, host.readFile, path);
+        function isEqualityExpression(node) {
+            return ts.isBinaryExpression(node) && isEqualityOperatorKind(node.operatorToken.kind);
         }
-        function tryFileExists(host, path) {
-            return tryIOAndConsumeErrors(host, host.fileExists, path);
+        function isEqualityOperatorKind(kind) {
+            return kind === 32 /* EqualsEqualsToken */ ||
+                kind === 33 /* ExclamationEqualsToken */ ||
+                kind === 34 /* EqualsEqualsEqualsToken */ ||
+                kind === 35 /* ExclamationEqualsEqualsToken */;
         }
-        function tryDirectoryExists(host, path) {
-            try {
-                return ts.directoryProbablyExists(path, host);
+        /** Get the corresponding JSDocTag node if the position is in a jsDoc comment */
+        function getJsDocTagAtPosition(node, position) {
+            var jsDoc = getJsDocHavingNode(node).jsDoc;
+            if (!jsDoc)
+                return undefined;
+            for (var _i = 0, jsDoc_1 = jsDoc; _i < jsDoc_1.length; _i++) {
+                var _a = jsDoc_1[_i], pos = _a.pos, end = _a.end, tags = _a.tags;
+                if (!tags || position < pos || position > end)
+                    continue;
+                for (var i = tags.length - 1; i >= 0; i--) {
+                    var tag = tags[i];
+                    if (position >= tag.pos) {
+                        return tag;
+                    }
+                }
             }
-            catch (e) { }
-            return undefined;
         }
-        function tryIOAndConsumeErrors(host, toApply) {
-            var args = [];
-            for (var _i = 2; _i < arguments.length; _i++) {
-                args[_i - 2] = arguments[_i];
-            }
-            try {
-                return toApply && toApply.apply(host, args);
+        function getJsDocHavingNode(node) {
+            if (!ts.isToken(node))
+                return node;
+            switch (node.kind) {
+                case 104 /* VarKeyword */:
+                case 110 /* LetKeyword */:
+                case 76 /* ConstKeyword */:
+                    // if the current token is var, let or const, skip the VariableDeclarationList
+                    return node.parent.parent;
+                default:
+                    return node.parent;
             }
-            catch (e) { }
-            return undefined;
         }
     })(Completions = ts.Completions || (ts.Completions = {}));
 })(ts || (ts = {}));
@@ -64912,692 +77669,1517 @@ var ts;
 (function (ts) {
     var DocumentHighlights;
     (function (DocumentHighlights) {
-        function getDocumentHighlights(typeChecker, cancellationToken, sourceFile, position, sourceFilesToSearch) {
-            var node = ts.getTouchingWord(sourceFile, position);
+        function getDocumentHighlights(program, cancellationToken, sourceFile, position, sourceFilesToSearch) {
+            var node = ts.getTouchingWord(sourceFile, position, /*includeJsDocComment*/ true);
+            if (!node)
+                return undefined;
+            if (ts.isJsxOpeningElement(node.parent) && node.parent.tagName === node || ts.isJsxClosingElement(node.parent)) {
+                // For a JSX element, just highlight the matching tag, not all references.
+                var _a = node.parent.parent, openingElement = _a.openingElement, closingElement = _a.closingElement;
+                var highlightSpans = [openingElement, closingElement].map(function (_a) {
+                    var tagName = _a.tagName;
+                    return getHighlightSpanForNode(tagName, sourceFile);
+                });
+                return [{ fileName: sourceFile.fileName, highlightSpans: highlightSpans }];
+            }
+            return getSemanticDocumentHighlights(node, program, cancellationToken, sourceFilesToSearch) || getSyntacticDocumentHighlights(node, sourceFile);
+        }
+        DocumentHighlights.getDocumentHighlights = getDocumentHighlights;
+        function getHighlightSpanForNode(node, sourceFile) {
+            return {
+                fileName: sourceFile.fileName,
+                textSpan: ts.createTextSpanFromNode(node, sourceFile),
+                kind: "none" /* none */
+            };
+        }
+        function getSemanticDocumentHighlights(node, program, cancellationToken, sourceFilesToSearch) {
+            var referenceEntries = ts.FindAllReferences.getReferenceEntriesForNode(node, program, sourceFilesToSearch, cancellationToken);
+            return referenceEntries && convertReferencedSymbols(referenceEntries);
+        }
+        function convertReferencedSymbols(referenceEntries) {
+            var fileNameToDocumentHighlights = ts.createMap();
+            for (var _i = 0, referenceEntries_1 = referenceEntries; _i < referenceEntries_1.length; _i++) {
+                var entry = referenceEntries_1[_i];
+                var _a = ts.FindAllReferences.toHighlightSpan(entry), fileName = _a.fileName, span_12 = _a.span;
+                var highlightSpans = fileNameToDocumentHighlights.get(fileName);
+                if (!highlightSpans) {
+                    fileNameToDocumentHighlights.set(fileName, highlightSpans = []);
+                }
+                highlightSpans.push(span_12);
+            }
+            return ts.arrayFrom(fileNameToDocumentHighlights.entries(), function (_a) {
+                var fileName = _a[0], highlightSpans = _a[1];
+                return ({ fileName: fileName, highlightSpans: highlightSpans });
+            });
+        }
+        function getSyntacticDocumentHighlights(node, sourceFile) {
+            var highlightSpans = getHighlightSpans(node, sourceFile);
+            if (!highlightSpans || highlightSpans.length === 0) {
+                return undefined;
+            }
+            return [{ fileName: sourceFile.fileName, highlightSpans: highlightSpans }];
+        }
+        // returns true if 'node' is defined and has a matching 'kind'.
+        function hasKind(node, kind) {
+            return node !== undefined && node.kind === kind;
+        }
+        // Null-propagating 'parent' function.
+        function parent(node) {
+            return node && node.parent;
+        }
+        function getHighlightSpans(node, sourceFile) {
             if (!node) {
                 return undefined;
             }
-            return getSemanticDocumentHighlights(node) || getSyntacticDocumentHighlights(node);
-            function getHighlightSpanForNode(node) {
-                var start = node.getStart();
-                var end = node.getEnd();
-                return {
-                    fileName: sourceFile.fileName,
-                    textSpan: ts.createTextSpanFromBounds(start, end),
-                    kind: ts.HighlightSpanKind.none
-                };
+            switch (node.kind) {
+                case 90 /* IfKeyword */:
+                case 82 /* ElseKeyword */:
+                    if (hasKind(node.parent, 211 /* IfStatement */)) {
+                        return getIfElseOccurrences(node.parent, sourceFile);
+                    }
+                    break;
+                case 96 /* ReturnKeyword */:
+                    if (hasKind(node.parent, 219 /* ReturnStatement */)) {
+                        return highlightSpans(getReturnOccurrences(node.parent));
+                    }
+                    break;
+                case 100 /* ThrowKeyword */:
+                    if (hasKind(node.parent, 223 /* ThrowStatement */)) {
+                        return highlightSpans(getThrowOccurrences(node.parent));
+                    }
+                    break;
+                case 102 /* TryKeyword */:
+                case 74 /* CatchKeyword */:
+                case 87 /* FinallyKeyword */:
+                    var tryStatement = node.kind === 74 /* CatchKeyword */ ? parent(parent(node)) : parent(node);
+                    if (hasKind(tryStatement, 224 /* TryStatement */)) {
+                        return highlightSpans(getTryCatchFinallyOccurrences(tryStatement, sourceFile));
+                    }
+                    break;
+                case 98 /* SwitchKeyword */:
+                    if (hasKind(node.parent, 221 /* SwitchStatement */)) {
+                        return highlightSpans(getSwitchCaseDefaultOccurrences(node.parent));
+                    }
+                    break;
+                case 73 /* CaseKeyword */:
+                case 79 /* DefaultKeyword */:
+                    if (hasKind(parent(parent(parent(node))), 221 /* SwitchStatement */)) {
+                        return highlightSpans(getSwitchCaseDefaultOccurrences(node.parent.parent.parent));
+                    }
+                    break;
+                case 72 /* BreakKeyword */:
+                case 77 /* ContinueKeyword */:
+                    if (hasKind(node.parent, 218 /* BreakStatement */) || hasKind(node.parent, 217 /* ContinueStatement */)) {
+                        return highlightSpans(getBreakOrContinueStatementOccurrences(node.parent));
+                    }
+                    break;
+                case 88 /* ForKeyword */:
+                    if (hasKind(node.parent, 214 /* ForStatement */) ||
+                        hasKind(node.parent, 215 /* ForInStatement */) ||
+                        hasKind(node.parent, 216 /* ForOfStatement */)) {
+                        return highlightSpans(getLoopBreakContinueOccurrences(node.parent));
+                    }
+                    break;
+                case 106 /* WhileKeyword */:
+                case 81 /* DoKeyword */:
+                    if (hasKind(node.parent, 213 /* WhileStatement */) || hasKind(node.parent, 212 /* DoStatement */)) {
+                        return highlightSpans(getLoopBreakContinueOccurrences(node.parent));
+                    }
+                    break;
+                case 123 /* ConstructorKeyword */:
+                    if (hasKind(node.parent, 152 /* Constructor */)) {
+                        return highlightSpans(getConstructorOccurrences(node.parent));
+                    }
+                    break;
+                case 125 /* GetKeyword */:
+                case 135 /* SetKeyword */:
+                    if (hasKind(node.parent, 153 /* GetAccessor */) || hasKind(node.parent, 154 /* SetAccessor */)) {
+                        return highlightSpans(getGetAndSetOccurrences(node.parent));
+                    }
+                    break;
+                default:
+                    if (ts.isModifierKind(node.kind) && node.parent &&
+                        (ts.isDeclaration(node.parent) || node.parent.kind === 208 /* VariableStatement */)) {
+                        return highlightSpans(getModifierOccurrences(node.kind, node.parent));
+                    }
             }
-            function getSemanticDocumentHighlights(node) {
-                if (node.kind === 69 /* Identifier */ ||
-                    node.kind === 97 /* ThisKeyword */ ||
-                    node.kind === 165 /* ThisType */ ||
-                    node.kind === 95 /* SuperKeyword */ ||
-                    node.kind === 9 /* StringLiteral */ ||
-                    ts.isLiteralNameOfPropertyDeclarationOrIndexAccess(node)) {
-                    var referencedSymbols = ts.FindAllReferences.getReferencedSymbolsForNode(typeChecker, cancellationToken, node, sourceFilesToSearch, /*findInStrings*/ false, /*findInComments*/ false, /*implementations*/ false);
-                    return convertReferencedSymbols(referencedSymbols);
+            function highlightSpans(nodes) {
+                return nodes && nodes.map(function (node) { return getHighlightSpanForNode(node, sourceFile); });
+            }
+        }
+        /**
+         * Aggregates all throw-statements within this node *without* crossing
+         * into function boundaries and try-blocks with catch-clauses.
+         */
+        function aggregateOwnedThrowStatements(node) {
+            var statementAccumulator = [];
+            aggregate(node);
+            return statementAccumulator;
+            function aggregate(node) {
+                if (node.kind === 223 /* ThrowStatement */) {
+                    statementAccumulator.push(node);
+                }
+                else if (node.kind === 224 /* TryStatement */) {
+                    var tryStatement = node;
+                    if (tryStatement.catchClause) {
+                        aggregate(tryStatement.catchClause);
+                    }
+                    else {
+                        // Exceptions thrown within a try block lacking a catch clause
+                        // are "owned" in the current context.
+                        aggregate(tryStatement.tryBlock);
+                    }
+                    if (tryStatement.finallyBlock) {
+                        aggregate(tryStatement.finallyBlock);
+                    }
                 }
-                return undefined;
-                function convertReferencedSymbols(referencedSymbols) {
-                    if (!referencedSymbols) {
-                        return undefined;
+                else if (!ts.isFunctionLike(node)) {
+                    ts.forEachChild(node, aggregate);
+                }
+            }
+        }
+        /**
+         * For lack of a better name, this function takes a throw statement and returns the
+         * nearest ancestor that is a try-block (whose try statement has a catch clause),
+         * function-block, or source file.
+         */
+        function getThrowStatementOwner(throwStatement) {
+            var child = throwStatement;
+            while (child.parent) {
+                var parent_21 = child.parent;
+                if (ts.isFunctionBlock(parent_21) || parent_21.kind === 265 /* SourceFile */) {
+                    return parent_21;
+                }
+                // A throw-statement is only owned by a try-statement if the try-statement has
+                // a catch clause, and if the throw-statement occurs within the try block.
+                if (parent_21.kind === 224 /* TryStatement */) {
+                    var tryStatement = parent_21;
+                    if (tryStatement.tryBlock === child && tryStatement.catchClause) {
+                        return child;
                     }
-                    var fileNameToDocumentHighlights = ts.createMap();
-                    var result = [];
-                    for (var _i = 0, referencedSymbols_1 = referencedSymbols; _i < referencedSymbols_1.length; _i++) {
-                        var referencedSymbol = referencedSymbols_1[_i];
-                        for (var _a = 0, _b = referencedSymbol.references; _a < _b.length; _a++) {
-                            var referenceEntry = _b[_a];
-                            var fileName = referenceEntry.fileName;
-                            var documentHighlights = fileNameToDocumentHighlights[fileName];
-                            if (!documentHighlights) {
-                                documentHighlights = { fileName: fileName, highlightSpans: [] };
-                                fileNameToDocumentHighlights[fileName] = documentHighlights;
-                                result.push(documentHighlights);
-                            }
-                            documentHighlights.highlightSpans.push({
-                                textSpan: referenceEntry.textSpan,
-                                kind: referenceEntry.isWriteAccess ? ts.HighlightSpanKind.writtenReference : ts.HighlightSpanKind.reference
-                            });
+                }
+                child = parent_21;
+            }
+            return undefined;
+        }
+        function aggregateAllBreakAndContinueStatements(node) {
+            var statementAccumulator = [];
+            aggregate(node);
+            return statementAccumulator;
+            function aggregate(node) {
+                if (node.kind === 218 /* BreakStatement */ || node.kind === 217 /* ContinueStatement */) {
+                    statementAccumulator.push(node);
+                }
+                else if (!ts.isFunctionLike(node)) {
+                    ts.forEachChild(node, aggregate);
+                }
+            }
+        }
+        function ownsBreakOrContinueStatement(owner, statement) {
+            var actualOwner = getBreakOrContinueOwner(statement);
+            return actualOwner && actualOwner === owner;
+        }
+        function getBreakOrContinueOwner(statement) {
+            for (var node = statement.parent; node; node = node.parent) {
+                switch (node.kind) {
+                    case 221 /* SwitchStatement */:
+                        if (statement.kind === 217 /* ContinueStatement */) {
+                            continue;
                         }
-                    }
-                    return result;
+                    // falls through
+                    case 214 /* ForStatement */:
+                    case 215 /* ForInStatement */:
+                    case 216 /* ForOfStatement */:
+                    case 213 /* WhileStatement */:
+                    case 212 /* DoStatement */:
+                        if (!statement.label || isLabeledBy(node, statement.label.text)) {
+                            return node;
+                        }
+                        break;
+                    default:
+                        // Don't cross function boundaries.
+                        if (ts.isFunctionLike(node)) {
+                            return undefined;
+                        }
+                        break;
                 }
             }
-            function getSyntacticDocumentHighlights(node) {
-                var fileName = sourceFile.fileName;
-                var highlightSpans = getHighlightSpans(node);
-                if (!highlightSpans || highlightSpans.length === 0) {
+            return undefined;
+        }
+        function getModifierOccurrences(modifier, declaration) {
+            var container = declaration.parent;
+            // Make sure we only highlight the keyword when it makes sense to do so.
+            if (ts.isAccessibilityModifier(modifier)) {
+                if (!(container.kind === 229 /* ClassDeclaration */ ||
+                    container.kind === 199 /* ClassExpression */ ||
+                    (declaration.kind === 146 /* Parameter */ && hasKind(container, 152 /* Constructor */)))) {
                     return undefined;
                 }
-                return [{ fileName: fileName, highlightSpans: highlightSpans }];
-                // returns true if 'node' is defined and has a matching 'kind'.
-                function hasKind(node, kind) {
-                    return node !== undefined && node.kind === kind;
+            }
+            else if (modifier === 115 /* StaticKeyword */) {
+                if (!(container.kind === 229 /* ClassDeclaration */ || container.kind === 199 /* ClassExpression */)) {
+                    return undefined;
                 }
-                // Null-propagating 'parent' function.
-                function parent(node) {
-                    return node && node.parent;
+            }
+            else if (modifier === 84 /* ExportKeyword */ || modifier === 124 /* DeclareKeyword */) {
+                if (!(container.kind === 234 /* ModuleBlock */ || container.kind === 265 /* SourceFile */)) {
+                    return undefined;
                 }
-                function getHighlightSpans(node) {
-                    if (node) {
-                        switch (node.kind) {
-                            case 88 /* IfKeyword */:
-                            case 80 /* ElseKeyword */:
-                                if (hasKind(node.parent, 203 /* IfStatement */)) {
-                                    return getIfElseOccurrences(node.parent);
-                                }
-                                break;
-                            case 94 /* ReturnKeyword */:
-                                if (hasKind(node.parent, 211 /* ReturnStatement */)) {
-                                    return getReturnOccurrences(node.parent);
-                                }
-                                break;
-                            case 98 /* ThrowKeyword */:
-                                if (hasKind(node.parent, 215 /* ThrowStatement */)) {
-                                    return getThrowOccurrences(node.parent);
-                                }
-                                break;
-                            case 72 /* CatchKeyword */:
-                                if (hasKind(parent(parent(node)), 216 /* TryStatement */)) {
-                                    return getTryCatchFinallyOccurrences(node.parent.parent);
-                                }
-                                break;
-                            case 100 /* TryKeyword */:
-                            case 85 /* FinallyKeyword */:
-                                if (hasKind(parent(node), 216 /* TryStatement */)) {
-                                    return getTryCatchFinallyOccurrences(node.parent);
-                                }
-                                break;
-                            case 96 /* SwitchKeyword */:
-                                if (hasKind(node.parent, 213 /* SwitchStatement */)) {
-                                    return getSwitchCaseDefaultOccurrences(node.parent);
-                                }
-                                break;
-                            case 71 /* CaseKeyword */:
-                            case 77 /* DefaultKeyword */:
-                                if (hasKind(parent(parent(parent(node))), 213 /* SwitchStatement */)) {
-                                    return getSwitchCaseDefaultOccurrences(node.parent.parent.parent);
-                                }
-                                break;
-                            case 70 /* BreakKeyword */:
-                            case 75 /* ContinueKeyword */:
-                                if (hasKind(node.parent, 210 /* BreakStatement */) || hasKind(node.parent, 209 /* ContinueStatement */)) {
-                                    return getBreakOrContinueStatementOccurrences(node.parent);
-                                }
-                                break;
-                            case 86 /* ForKeyword */:
-                                if (hasKind(node.parent, 206 /* ForStatement */) ||
-                                    hasKind(node.parent, 207 /* ForInStatement */) ||
-                                    hasKind(node.parent, 208 /* ForOfStatement */)) {
-                                    return getLoopBreakContinueOccurrences(node.parent);
-                                }
-                                break;
-                            case 104 /* WhileKeyword */:
-                            case 79 /* DoKeyword */:
-                                if (hasKind(node.parent, 205 /* WhileStatement */) || hasKind(node.parent, 204 /* DoStatement */)) {
-                                    return getLoopBreakContinueOccurrences(node.parent);
-                                }
-                                break;
-                            case 121 /* ConstructorKeyword */:
-                                if (hasKind(node.parent, 148 /* Constructor */)) {
-                                    return getConstructorOccurrences(node.parent);
-                                }
-                                break;
-                            case 123 /* GetKeyword */:
-                            case 131 /* SetKeyword */:
-                                if (hasKind(node.parent, 149 /* GetAccessor */) || hasKind(node.parent, 150 /* SetAccessor */)) {
-                                    return getGetAndSetOccurrences(node.parent);
-                                }
-                                break;
-                            default:
-                                if (ts.isModifierKind(node.kind) && node.parent &&
-                                    (ts.isDeclaration(node.parent) || node.parent.kind === 200 /* VariableStatement */)) {
-                                    return getModifierOccurrences(node.kind, node.parent);
-                                }
-                        }
-                    }
+            }
+            else if (modifier === 117 /* AbstractKeyword */) {
+                if (!(container.kind === 229 /* ClassDeclaration */ || declaration.kind === 229 /* ClassDeclaration */)) {
                     return undefined;
                 }
-                /**
-                 * Aggregates all throw-statements within this node *without* crossing
-                 * into function boundaries and try-blocks with catch-clauses.
-                 */
-                function aggregateOwnedThrowStatements(node) {
-                    var statementAccumulator = [];
-                    aggregate(node);
-                    return statementAccumulator;
-                    function aggregate(node) {
-                        if (node.kind === 215 /* ThrowStatement */) {
-                            statementAccumulator.push(node);
-                        }
-                        else if (node.kind === 216 /* TryStatement */) {
-                            var tryStatement = node;
-                            if (tryStatement.catchClause) {
-                                aggregate(tryStatement.catchClause);
-                            }
-                            else {
-                                // Exceptions thrown within a try block lacking a catch clause
-                                // are "owned" in the current context.
-                                aggregate(tryStatement.tryBlock);
-                            }
-                            if (tryStatement.finallyBlock) {
-                                aggregate(tryStatement.finallyBlock);
-                            }
-                        }
-                        else if (!ts.isFunctionLike(node)) {
-                            ts.forEachChild(node, aggregate);
+            }
+            else {
+                // unsupported modifier
+                return undefined;
+            }
+            var keywords = [];
+            var modifierFlag = getFlagFromModifier(modifier);
+            var nodes;
+            switch (container.kind) {
+                case 234 /* ModuleBlock */:
+                case 265 /* SourceFile */:
+                    // Container is either a class declaration or the declaration is a classDeclaration
+                    if (modifierFlag & 128 /* Abstract */) {
+                        nodes = declaration.members.concat(declaration);
+                    }
+                    else {
+                        nodes = container.statements;
+                    }
+                    break;
+                case 152 /* Constructor */:
+                    nodes = container.parameters.concat(container.parent.members);
+                    break;
+                case 229 /* ClassDeclaration */:
+                case 199 /* ClassExpression */:
+                    nodes = container.members;
+                    // If we're an accessibility modifier, we're in an instance member and should search
+                    // the constructor's parameter list for instance members as well.
+                    if (modifierFlag & 28 /* AccessibilityModifier */) {
+                        var constructor = ts.forEach(container.members, function (member) {
+                            return member.kind === 152 /* Constructor */ && member;
+                        });
+                        if (constructor) {
+                            nodes = nodes.concat(constructor.parameters);
                         }
                     }
+                    else if (modifierFlag & 128 /* Abstract */) {
+                        nodes = nodes.concat(container);
+                    }
+                    break;
+                default:
+                    ts.Debug.fail("Invalid container kind.");
+            }
+            ts.forEach(nodes, function (node) {
+                if (ts.getModifierFlags(node) & modifierFlag) {
+                    ts.forEach(node.modifiers, function (child) { return pushKeywordIf(keywords, child, modifier); });
                 }
-                /**
-                 * For lack of a better name, this function takes a throw statement and returns the
-                 * nearest ancestor that is a try-block (whose try statement has a catch clause),
-                 * function-block, or source file.
-                 */
-                function getThrowStatementOwner(throwStatement) {
-                    var child = throwStatement;
-                    while (child.parent) {
-                        var parent_20 = child.parent;
-                        if (ts.isFunctionBlock(parent_20) || parent_20.kind === 256 /* SourceFile */) {
-                            return parent_20;
-                        }
-                        // A throw-statement is only owned by a try-statement if the try-statement has
-                        // a catch clause, and if the throw-statement occurs within the try block.
-                        if (parent_20.kind === 216 /* TryStatement */) {
-                            var tryStatement = parent_20;
-                            if (tryStatement.tryBlock === child && tryStatement.catchClause) {
-                                return child;
-                            }
+            });
+            return keywords;
+            function getFlagFromModifier(modifier) {
+                switch (modifier) {
+                    case 114 /* PublicKeyword */:
+                        return 4 /* Public */;
+                    case 112 /* PrivateKeyword */:
+                        return 8 /* Private */;
+                    case 113 /* ProtectedKeyword */:
+                        return 16 /* Protected */;
+                    case 115 /* StaticKeyword */:
+                        return 32 /* Static */;
+                    case 84 /* ExportKeyword */:
+                        return 1 /* Export */;
+                    case 124 /* DeclareKeyword */:
+                        return 2 /* Ambient */;
+                    case 117 /* AbstractKeyword */:
+                        return 128 /* Abstract */;
+                    default:
+                        ts.Debug.fail();
+                }
+            }
+        }
+        function pushKeywordIf(keywordList, token) {
+            var expected = [];
+            for (var _i = 2; _i < arguments.length; _i++) {
+                expected[_i - 2] = arguments[_i];
+            }
+            if (token && ts.contains(expected, token.kind)) {
+                keywordList.push(token);
+                return true;
+            }
+            return false;
+        }
+        function getGetAndSetOccurrences(accessorDeclaration) {
+            var keywords = [];
+            tryPushAccessorKeyword(accessorDeclaration.symbol, 153 /* GetAccessor */);
+            tryPushAccessorKeyword(accessorDeclaration.symbol, 154 /* SetAccessor */);
+            return keywords;
+            function tryPushAccessorKeyword(accessorSymbol, accessorKind) {
+                var accessor = ts.getDeclarationOfKind(accessorSymbol, accessorKind);
+                if (accessor) {
+                    ts.forEach(accessor.getChildren(), function (child) { return pushKeywordIf(keywords, child, 125 /* GetKeyword */, 135 /* SetKeyword */); });
+                }
+            }
+        }
+        function getConstructorOccurrences(constructorDeclaration) {
+            var declarations = constructorDeclaration.symbol.getDeclarations();
+            var keywords = [];
+            ts.forEach(declarations, function (declaration) {
+                ts.forEach(declaration.getChildren(), function (token) {
+                    return pushKeywordIf(keywords, token, 123 /* ConstructorKeyword */);
+                });
+            });
+            return keywords;
+        }
+        function getLoopBreakContinueOccurrences(loopNode) {
+            var keywords = [];
+            if (pushKeywordIf(keywords, loopNode.getFirstToken(), 88 /* ForKeyword */, 106 /* WhileKeyword */, 81 /* DoKeyword */)) {
+                // If we succeeded and got a do-while loop, then start looking for a 'while' keyword.
+                if (loopNode.kind === 212 /* DoStatement */) {
+                    var loopTokens = loopNode.getChildren();
+                    for (var i = loopTokens.length - 1; i >= 0; i--) {
+                        if (pushKeywordIf(keywords, loopTokens[i], 106 /* WhileKeyword */)) {
+                            break;
                         }
-                        child = parent_20;
                     }
-                    return undefined;
                 }
-                function aggregateAllBreakAndContinueStatements(node) {
-                    var statementAccumulator = [];
-                    aggregate(node);
-                    return statementAccumulator;
-                    function aggregate(node) {
-                        if (node.kind === 210 /* BreakStatement */ || node.kind === 209 /* ContinueStatement */) {
-                            statementAccumulator.push(node);
-                        }
-                        else if (!ts.isFunctionLike(node)) {
-                            ts.forEachChild(node, aggregate);
+            }
+            var breaksAndContinues = aggregateAllBreakAndContinueStatements(loopNode.statement);
+            ts.forEach(breaksAndContinues, function (statement) {
+                if (ownsBreakOrContinueStatement(loopNode, statement)) {
+                    pushKeywordIf(keywords, statement.getFirstToken(), 72 /* BreakKeyword */, 77 /* ContinueKeyword */);
+                }
+            });
+            return keywords;
+        }
+        function getBreakOrContinueStatementOccurrences(breakOrContinueStatement) {
+            var owner = getBreakOrContinueOwner(breakOrContinueStatement);
+            if (owner) {
+                switch (owner.kind) {
+                    case 214 /* ForStatement */:
+                    case 215 /* ForInStatement */:
+                    case 216 /* ForOfStatement */:
+                    case 212 /* DoStatement */:
+                    case 213 /* WhileStatement */:
+                        return getLoopBreakContinueOccurrences(owner);
+                    case 221 /* SwitchStatement */:
+                        return getSwitchCaseDefaultOccurrences(owner);
+                }
+            }
+            return undefined;
+        }
+        function getSwitchCaseDefaultOccurrences(switchStatement) {
+            var keywords = [];
+            pushKeywordIf(keywords, switchStatement.getFirstToken(), 98 /* SwitchKeyword */);
+            // Go through each clause in the switch statement, collecting the 'case'/'default' keywords.
+            ts.forEach(switchStatement.caseBlock.clauses, function (clause) {
+                pushKeywordIf(keywords, clause.getFirstToken(), 73 /* CaseKeyword */, 79 /* DefaultKeyword */);
+                var breaksAndContinues = aggregateAllBreakAndContinueStatements(clause);
+                ts.forEach(breaksAndContinues, function (statement) {
+                    if (ownsBreakOrContinueStatement(switchStatement, statement)) {
+                        pushKeywordIf(keywords, statement.getFirstToken(), 72 /* BreakKeyword */);
+                    }
+                });
+            });
+            return keywords;
+        }
+        function getTryCatchFinallyOccurrences(tryStatement, sourceFile) {
+            var keywords = [];
+            pushKeywordIf(keywords, tryStatement.getFirstToken(), 102 /* TryKeyword */);
+            if (tryStatement.catchClause) {
+                pushKeywordIf(keywords, tryStatement.catchClause.getFirstToken(), 74 /* CatchKeyword */);
+            }
+            if (tryStatement.finallyBlock) {
+                var finallyKeyword = ts.findChildOfKind(tryStatement, 87 /* FinallyKeyword */, sourceFile);
+                pushKeywordIf(keywords, finallyKeyword, 87 /* FinallyKeyword */);
+            }
+            return keywords;
+        }
+        function getThrowOccurrences(throwStatement) {
+            var owner = getThrowStatementOwner(throwStatement);
+            if (!owner) {
+                return undefined;
+            }
+            var keywords = [];
+            ts.forEach(aggregateOwnedThrowStatements(owner), function (throwStatement) {
+                pushKeywordIf(keywords, throwStatement.getFirstToken(), 100 /* ThrowKeyword */);
+            });
+            // If the "owner" is a function, then we equate 'return' and 'throw' statements in their
+            // ability to "jump out" of the function, and include occurrences for both.
+            if (ts.isFunctionBlock(owner)) {
+                ts.forEachReturnStatement(owner, function (returnStatement) {
+                    pushKeywordIf(keywords, returnStatement.getFirstToken(), 96 /* ReturnKeyword */);
+                });
+            }
+            return keywords;
+        }
+        function getReturnOccurrences(returnStatement) {
+            var func = ts.getContainingFunction(returnStatement);
+            // If we didn't find a containing function with a block body, bail out.
+            if (!(func && hasKind(func.body, 207 /* Block */))) {
+                return undefined;
+            }
+            var keywords = [];
+            ts.forEachReturnStatement(func.body, function (returnStatement) {
+                pushKeywordIf(keywords, returnStatement.getFirstToken(), 96 /* ReturnKeyword */);
+            });
+            // Include 'throw' statements that do not occur within a try block.
+            ts.forEach(aggregateOwnedThrowStatements(func.body), function (throwStatement) {
+                pushKeywordIf(keywords, throwStatement.getFirstToken(), 100 /* ThrowKeyword */);
+            });
+            return keywords;
+        }
+        function getIfElseOccurrences(ifStatement, sourceFile) {
+            var keywords = [];
+            // Traverse upwards through all parent if-statements linked by their else-branches.
+            while (hasKind(ifStatement.parent, 211 /* IfStatement */) && ifStatement.parent.elseStatement === ifStatement) {
+                ifStatement = ifStatement.parent;
+            }
+            // Now traverse back down through the else branches, aggregating if/else keywords of if-statements.
+            while (ifStatement) {
+                var children = ifStatement.getChildren();
+                pushKeywordIf(keywords, children[0], 90 /* IfKeyword */);
+                // Generally the 'else' keyword is second-to-last, so we traverse backwards.
+                for (var i = children.length - 1; i >= 0; i--) {
+                    if (pushKeywordIf(keywords, children[i], 82 /* ElseKeyword */)) {
+                        break;
+                    }
+                }
+                if (!hasKind(ifStatement.elseStatement, 211 /* IfStatement */)) {
+                    break;
+                }
+                ifStatement = ifStatement.elseStatement;
+            }
+            var result = [];
+            // We'd like to highlight else/ifs together if they are only separated by whitespace
+            // (i.e. the keywords are separated by no comments, no newlines).
+            for (var i = 0; i < keywords.length; i++) {
+                if (keywords[i].kind === 82 /* ElseKeyword */ && i < keywords.length - 1) {
+                    var elseKeyword = keywords[i];
+                    var ifKeyword = keywords[i + 1]; // this *should* always be an 'if' keyword.
+                    var shouldCombindElseAndIf = true;
+                    // Avoid recalculating getStart() by iterating backwards.
+                    for (var j = ifKeyword.getStart() - 1; j >= elseKeyword.end; j--) {
+                        if (!ts.isWhiteSpaceSingleLine(sourceFile.text.charCodeAt(j))) {
+                            shouldCombindElseAndIf = false;
+                            break;
                         }
                     }
+                    if (shouldCombindElseAndIf) {
+                        result.push({
+                            fileName: sourceFile.fileName,
+                            textSpan: ts.createTextSpanFromBounds(elseKeyword.getStart(), ifKeyword.end),
+                            kind: "reference" /* reference */
+                        });
+                        i++; // skip the next keyword
+                        continue;
+                    }
                 }
-                function ownsBreakOrContinueStatement(owner, statement) {
-                    var actualOwner = getBreakOrContinueOwner(statement);
-                    return actualOwner && actualOwner === owner;
+                // Ordinary case: just highlight the keyword.
+                result.push(getHighlightSpanForNode(keywords[i], sourceFile));
+            }
+            return result;
+        }
+        /**
+         * Whether or not a 'node' is preceded by a label of the given string.
+         * Note: 'node' cannot be a SourceFile.
+         */
+        function isLabeledBy(node, labelName) {
+            for (var owner = node.parent; owner.kind === 222 /* LabeledStatement */; owner = owner.parent) {
+                if (owner.label.text === labelName) {
+                    return true;
                 }
-                function getBreakOrContinueOwner(statement) {
-                    for (var node_1 = statement.parent; node_1; node_1 = node_1.parent) {
-                        switch (node_1.kind) {
-                            case 213 /* SwitchStatement */:
-                                if (statement.kind === 209 /* ContinueStatement */) {
-                                    continue;
+            }
+            return false;
+        }
+    })(DocumentHighlights = ts.DocumentHighlights || (ts.DocumentHighlights = {}));
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    function createDocumentRegistry(useCaseSensitiveFileNames, currentDirectory) {
+        if (currentDirectory === void 0) { currentDirectory = ""; }
+        // Maps from compiler setting target (ES3, ES5, etc.) to all the cached documents we have
+        // for those settings.
+        var buckets = ts.createMap();
+        var getCanonicalFileName = ts.createGetCanonicalFileName(!!useCaseSensitiveFileNames);
+        function getKeyForCompilationSettings(settings) {
+            return "_" + settings.target + "|" + settings.module + "|" + settings.noResolve + "|" + settings.jsx + "|" + settings.allowJs + "|" + settings.baseUrl + "|" + JSON.stringify(settings.typeRoots) + "|" + JSON.stringify(settings.rootDirs) + "|" + JSON.stringify(settings.paths);
+        }
+        function getBucketForCompilationSettings(key, createIfMissing) {
+            var bucket = buckets.get(key);
+            if (!bucket && createIfMissing) {
+                buckets.set(key, bucket = ts.createFileMap());
+            }
+            return bucket;
+        }
+        function reportStats() {
+            var bucketInfoArray = ts.arrayFrom(buckets.keys()).filter(function (name) { return name && name.charAt(0) === "_"; }).map(function (name) {
+                var entries = buckets.get(name);
+                var sourceFiles = [];
+                entries.forEachValue(function (key, entry) {
+                    sourceFiles.push({
+                        name: key,
+                        refCount: entry.languageServiceRefCount,
+                        references: entry.owners.slice(0)
+                    });
+                });
+                sourceFiles.sort(function (x, y) { return y.refCount - x.refCount; });
+                return {
+                    bucket: name,
+                    sourceFiles: sourceFiles
+                };
+            });
+            return JSON.stringify(bucketInfoArray, undefined, 2);
+        }
+        function acquireDocument(fileName, compilationSettings, scriptSnapshot, version, scriptKind) {
+            var path = ts.toPath(fileName, currentDirectory, getCanonicalFileName);
+            var key = getKeyForCompilationSettings(compilationSettings);
+            return acquireDocumentWithKey(fileName, path, compilationSettings, key, scriptSnapshot, version, scriptKind);
+        }
+        function acquireDocumentWithKey(fileName, path, compilationSettings, key, scriptSnapshot, version, scriptKind) {
+            return acquireOrUpdateDocument(fileName, path, compilationSettings, key, scriptSnapshot, version, /*acquiring*/ true, scriptKind);
+        }
+        function updateDocument(fileName, compilationSettings, scriptSnapshot, version, scriptKind) {
+            var path = ts.toPath(fileName, currentDirectory, getCanonicalFileName);
+            var key = getKeyForCompilationSettings(compilationSettings);
+            return updateDocumentWithKey(fileName, path, compilationSettings, key, scriptSnapshot, version, scriptKind);
+        }
+        function updateDocumentWithKey(fileName, path, compilationSettings, key, scriptSnapshot, version, scriptKind) {
+            return acquireOrUpdateDocument(fileName, path, compilationSettings, key, scriptSnapshot, version, /*acquiring*/ false, scriptKind);
+        }
+        function acquireOrUpdateDocument(fileName, path, compilationSettings, key, scriptSnapshot, version, acquiring, scriptKind) {
+            var bucket = getBucketForCompilationSettings(key, /*createIfMissing*/ true);
+            var entry = bucket.get(path);
+            if (!entry) {
+                ts.Debug.assert(acquiring, "How could we be trying to update a document that the registry doesn't have?");
+                // Have never seen this file with these settings.  Create a new source file for it.
+                var sourceFile = ts.createLanguageServiceSourceFile(fileName, scriptSnapshot, compilationSettings.target, version, /*setNodeParents*/ false, scriptKind);
+                entry = {
+                    sourceFile: sourceFile,
+                    languageServiceRefCount: 0,
+                    owners: []
+                };
+                bucket.set(path, entry);
+            }
+            else {
+                // We have an entry for this file.  However, it may be for a different version of
+                // the script snapshot.  If so, update it appropriately.  Otherwise, we can just
+                // return it as is.
+                if (entry.sourceFile.version !== version) {
+                    entry.sourceFile = ts.updateLanguageServiceSourceFile(entry.sourceFile, scriptSnapshot, version, scriptSnapshot.getChangeRange(entry.sourceFile.scriptSnapshot));
+                }
+            }
+            // If we're acquiring, then this is the first time this LS is asking for this document.
+            // Increase our ref count so we know there's another LS using the document.  If we're
+            // not acquiring, then that means the LS is 'updating' the file instead, and that means
+            // it has already acquired the document previously.  As such, we do not need to increase
+            // the ref count.
+            if (acquiring) {
+                entry.languageServiceRefCount++;
+            }
+            return entry.sourceFile;
+        }
+        function releaseDocument(fileName, compilationSettings) {
+            var path = ts.toPath(fileName, currentDirectory, getCanonicalFileName);
+            var key = getKeyForCompilationSettings(compilationSettings);
+            return releaseDocumentWithKey(path, key);
+        }
+        function releaseDocumentWithKey(path, key) {
+            var bucket = getBucketForCompilationSettings(key, /*createIfMissing*/ false);
+            ts.Debug.assert(bucket !== undefined);
+            var entry = bucket.get(path);
+            entry.languageServiceRefCount--;
+            ts.Debug.assert(entry.languageServiceRefCount >= 0);
+            if (entry.languageServiceRefCount === 0) {
+                bucket.remove(path);
+            }
+        }
+        return {
+            acquireDocument: acquireDocument,
+            acquireDocumentWithKey: acquireDocumentWithKey,
+            updateDocument: updateDocument,
+            updateDocumentWithKey: updateDocumentWithKey,
+            releaseDocument: releaseDocument,
+            releaseDocumentWithKey: releaseDocumentWithKey,
+            reportStats: reportStats,
+            getKeyForCompilationSettings: getKeyForCompilationSettings
+        };
+    }
+    ts.createDocumentRegistry = createDocumentRegistry;
+})(ts || (ts = {}));
+/* Code for finding imports of an exported symbol. Used only by FindAllReferences. */
+/* @internal */
+var ts;
+(function (ts) {
+    var FindAllReferences;
+    (function (FindAllReferences) {
+        /** Creates the imports map and returns an ImportTracker that uses it. Call this lazily to avoid calling `getDirectImportsMap` unnecessarily.  */
+        function createImportTracker(sourceFiles, checker, cancellationToken) {
+            var allDirectImports = getDirectImportsMap(sourceFiles, checker, cancellationToken);
+            return function (exportSymbol, exportInfo, isForRename) {
+                var _a = getImportersForExport(sourceFiles, allDirectImports, exportInfo, checker, cancellationToken), directImports = _a.directImports, indirectUsers = _a.indirectUsers;
+                return __assign({ indirectUsers: indirectUsers }, getSearchesFromDirectImports(directImports, exportSymbol, exportInfo.exportKind, checker, isForRename));
+            };
+        }
+        FindAllReferences.createImportTracker = createImportTracker;
+        var ExportKind;
+        (function (ExportKind) {
+            ExportKind[ExportKind["Named"] = 0] = "Named";
+            ExportKind[ExportKind["Default"] = 1] = "Default";
+            ExportKind[ExportKind["ExportEquals"] = 2] = "ExportEquals";
+        })(ExportKind = FindAllReferences.ExportKind || (FindAllReferences.ExportKind = {}));
+        var ImportExport;
+        (function (ImportExport) {
+            ImportExport[ImportExport["Import"] = 0] = "Import";
+            ImportExport[ImportExport["Export"] = 1] = "Export";
+        })(ImportExport = FindAllReferences.ImportExport || (FindAllReferences.ImportExport = {}));
+        /** Returns import statements that directly reference the exporting module, and a list of files that may access the module through a namespace. */
+        function getImportersForExport(sourceFiles, allDirectImports, _a, checker, cancellationToken) {
+            var exportingModuleSymbol = _a.exportingModuleSymbol, exportKind = _a.exportKind;
+            var markSeenDirectImport = ts.nodeSeenTracker();
+            var markSeenIndirectUser = ts.nodeSeenTracker();
+            var directImports = [];
+            var isAvailableThroughGlobal = !!exportingModuleSymbol.globalExports;
+            var indirectUserDeclarations = isAvailableThroughGlobal ? undefined : [];
+            handleDirectImports(exportingModuleSymbol);
+            return { directImports: directImports, indirectUsers: getIndirectUsers() };
+            function getIndirectUsers() {
+                if (isAvailableThroughGlobal) {
+                    // It has `export as namespace`, so anything could potentially use it.
+                    return sourceFiles;
+                }
+                // Module augmentations may use this module's exports without importing it.
+                for (var _i = 0, _a = exportingModuleSymbol.declarations; _i < _a.length; _i++) {
+                    var decl = _a[_i];
+                    if (ts.isExternalModuleAugmentation(decl)) {
+                        addIndirectUser(decl);
+                    }
+                }
+                // This may return duplicates (if there are multiple module declarations in a single source file, all importing the same thing as a namespace), but `State.markSearchedSymbol` will handle that.
+                return indirectUserDeclarations.map(ts.getSourceFileOfNode);
+            }
+            function handleDirectImports(exportingModuleSymbol) {
+                var theseDirectImports = getDirectImports(exportingModuleSymbol);
+                if (theseDirectImports) {
+                    for (var _i = 0, theseDirectImports_1 = theseDirectImports; _i < theseDirectImports_1.length; _i++) {
+                        var direct = theseDirectImports_1[_i];
+                        if (!markSeenDirectImport(direct)) {
+                            continue;
+                        }
+                        cancellationToken.throwIfCancellationRequested();
+                        switch (direct.kind) {
+                            case 181 /* CallExpression */:
+                                if (!isAvailableThroughGlobal) {
+                                    var parent_22 = direct.parent;
+                                    if (exportKind === 2 /* ExportEquals */ && parent_22.kind === 226 /* VariableDeclaration */) {
+                                        var name_62 = parent_22.name;
+                                        if (name_62.kind === 71 /* Identifier */) {
+                                            directImports.push(name_62);
+                                            break;
+                                        }
+                                    }
+                                    // Don't support re-exporting 'require()' calls, so just add a single indirect user.
+                                    addIndirectUser(direct.getSourceFile());
+                                }
+                                break;
+                            case 237 /* ImportEqualsDeclaration */:
+                                handleNamespaceImport(direct, direct.name, ts.hasModifier(direct, 1 /* Export */));
+                                break;
+                            case 238 /* ImportDeclaration */:
+                                var namedBindings = direct.importClause && direct.importClause.namedBindings;
+                                if (namedBindings && namedBindings.kind === 240 /* NamespaceImport */) {
+                                    handleNamespaceImport(direct, namedBindings.name);
                                 }
-                            // Fall through.
-                            case 206 /* ForStatement */:
-                            case 207 /* ForInStatement */:
-                            case 208 /* ForOfStatement */:
-                            case 205 /* WhileStatement */:
-                            case 204 /* DoStatement */:
-                                if (!statement.label || isLabeledBy(node_1, statement.label.text)) {
-                                    return node_1;
+                                else {
+                                    directImports.push(direct);
                                 }
                                 break;
-                            default:
-                                // Don't cross function boundaries.
-                                if (ts.isFunctionLike(node_1)) {
-                                    return undefined;
+                            case 244 /* ExportDeclaration */:
+                                if (!direct.exportClause) {
+                                    // This is `export * from "foo"`, so imports of this module may import the export too.
+                                    handleDirectImports(getContainingModuleSymbol(direct, checker));
+                                }
+                                else {
+                                    // This is `export { foo } from "foo"` and creates an alias symbol, so recursive search will get handle re-exports.
+                                    directImports.push(direct);
                                 }
                                 break;
                         }
                     }
-                    return undefined;
                 }
-                function getModifierOccurrences(modifier, declaration) {
-                    var container = declaration.parent;
-                    // Make sure we only highlight the keyword when it makes sense to do so.
-                    if (ts.isAccessibilityModifier(modifier)) {
-                        if (!(container.kind === 221 /* ClassDeclaration */ ||
-                            container.kind === 192 /* ClassExpression */ ||
-                            (declaration.kind === 142 /* Parameter */ && hasKind(container, 148 /* Constructor */)))) {
-                            return undefined;
-                        }
+            }
+            function handleNamespaceImport(importDeclaration, name, isReExport) {
+                if (exportKind === 2 /* ExportEquals */) {
+                    // This is a direct import, not import-as-namespace.
+                    directImports.push(importDeclaration);
+                }
+                else if (!isAvailableThroughGlobal) {
+                    var sourceFileLike = getSourceFileLikeForImportDeclaration(importDeclaration);
+                    ts.Debug.assert(sourceFileLike.kind === 265 /* SourceFile */ || sourceFileLike.kind === 233 /* ModuleDeclaration */);
+                    if (isReExport || findNamespaceReExports(sourceFileLike, name, checker)) {
+                        addIndirectUsers(sourceFileLike);
                     }
-                    else if (modifier === 113 /* StaticKeyword */) {
-                        if (!(container.kind === 221 /* ClassDeclaration */ || container.kind === 192 /* ClassExpression */)) {
-                            return undefined;
-                        }
+                    else {
+                        addIndirectUser(sourceFileLike);
                     }
-                    else if (modifier === 82 /* ExportKeyword */ || modifier === 122 /* DeclareKeyword */) {
-                        if (!(container.kind === 226 /* ModuleBlock */ || container.kind === 256 /* SourceFile */)) {
-                            return undefined;
-                        }
+                }
+            }
+            function addIndirectUser(sourceFileLike) {
+                ts.Debug.assert(!isAvailableThroughGlobal);
+                var isNew = markSeenIndirectUser(sourceFileLike);
+                if (isNew) {
+                    indirectUserDeclarations.push(sourceFileLike);
+                }
+                return isNew;
+            }
+            /** Adds a module and all of its transitive dependencies as possible indirect users. */
+            function addIndirectUsers(sourceFileLike) {
+                if (!addIndirectUser(sourceFileLike)) {
+                    return;
+                }
+                var moduleSymbol = checker.getMergedSymbol(sourceFileLike.symbol);
+                ts.Debug.assert(!!(moduleSymbol.flags & 1536 /* Module */));
+                var directImports = getDirectImports(moduleSymbol);
+                if (directImports) {
+                    for (var _i = 0, directImports_1 = directImports; _i < directImports_1.length; _i++) {
+                        var directImport = directImports_1[_i];
+                        addIndirectUsers(getSourceFileLikeForImportDeclaration(directImport));
                     }
-                    else if (modifier === 115 /* AbstractKeyword */) {
-                        if (!(container.kind === 221 /* ClassDeclaration */ || declaration.kind === 221 /* ClassDeclaration */)) {
-                            return undefined;
-                        }
+                }
+            }
+            function getDirectImports(moduleSymbol) {
+                return allDirectImports.get(ts.getSymbolId(moduleSymbol).toString());
+            }
+        }
+        /**
+         * Given the set of direct imports of a module, we need to find which ones import the particular exported symbol.
+         * The returned `importSearches` will result in the entire source file being searched.
+         * But re-exports will be placed in 'singleReferences' since they cannot be locally referenced.
+         */
+        function getSearchesFromDirectImports(directImports, exportSymbol, exportKind, checker, isForRename) {
+            var exportName = exportSymbol.name;
+            var importSearches = [];
+            var singleReferences = [];
+            function addSearch(location, symbol) {
+                importSearches.push([location, symbol]);
+            }
+            if (directImports) {
+                for (var _i = 0, directImports_2 = directImports; _i < directImports_2.length; _i++) {
+                    var decl = directImports_2[_i];
+                    handleImport(decl);
+                }
+            }
+            return { importSearches: importSearches, singleReferences: singleReferences };
+            function handleImport(decl) {
+                if (decl.kind === 237 /* ImportEqualsDeclaration */) {
+                    if (isExternalModuleImportEquals(decl)) {
+                        handleNamespaceImportLike(decl.name);
                     }
-                    else {
-                        // unsupported modifier
-                        return undefined;
+                    return;
+                }
+                if (decl.kind === 71 /* Identifier */) {
+                    handleNamespaceImportLike(decl);
+                    return;
+                }
+                // Ignore if there's a grammar error
+                if (decl.moduleSpecifier.kind !== 9 /* StringLiteral */) {
+                    return;
+                }
+                if (decl.kind === 244 /* ExportDeclaration */) {
+                    searchForNamedImport(decl.exportClause);
+                    return;
+                }
+                if (!decl.importClause) {
+                    return;
+                }
+                var importClause = decl.importClause;
+                var namedBindings = importClause.namedBindings;
+                if (namedBindings && namedBindings.kind === 240 /* NamespaceImport */) {
+                    handleNamespaceImportLike(namedBindings.name);
+                    return;
+                }
+                if (exportKind === 0 /* Named */) {
+                    searchForNamedImport(namedBindings);
+                }
+                else {
+                    // `export =` might be imported by a default import if `--allowSyntheticDefaultImports` is on, so this handles both ExportKind.Default and ExportKind.ExportEquals
+                    var name_63 = importClause.name;
+                    // If a default import has the same name as the default export, allow to rename it.
+                    // Given `import f` and `export default function f`, we will rename both, but for `import g` we will rename just that.
+                    if (name_63 && (!isForRename || name_63.text === symbolName(exportSymbol))) {
+                        var defaultImportAlias = checker.getSymbolAtLocation(name_63);
+                        addSearch(name_63, defaultImportAlias);
                     }
-                    var keywords = [];
-                    var modifierFlag = getFlagFromModifier(modifier);
-                    var nodes;
-                    switch (container.kind) {
-                        case 226 /* ModuleBlock */:
-                        case 256 /* SourceFile */:
-                            // Container is either a class declaration or the declaration is a classDeclaration
-                            if (modifierFlag & 128 /* Abstract */) {
-                                nodes = declaration.members.concat(declaration);
-                            }
-                            else {
-                                nodes = container.statements;
-                            }
-                            break;
-                        case 148 /* Constructor */:
-                            nodes = container.parameters.concat(container.parent.members);
-                            break;
-                        case 221 /* ClassDeclaration */:
-                        case 192 /* ClassExpression */:
-                            nodes = container.members;
-                            // If we're an accessibility modifier, we're in an instance member and should search
-                            // the constructor's parameter list for instance members as well.
-                            if (modifierFlag & 28 /* AccessibilityModifier */) {
-                                var constructor = ts.forEach(container.members, function (member) {
-                                    return member.kind === 148 /* Constructor */ && member;
-                                });
-                                if (constructor) {
-                                    nodes = nodes.concat(constructor.parameters);
-                                }
-                            }
-                            else if (modifierFlag & 128 /* Abstract */) {
-                                nodes = nodes.concat(container);
-                            }
-                            break;
-                        default:
-                            ts.Debug.fail("Invalid container kind.");
+                    // 'default' might be accessed as a named import `{ default as foo }`.
+                    if (!isForRename && exportKind === 1 /* Default */) {
+                        ts.Debug.assert(exportName === "default");
+                        searchForNamedImport(namedBindings);
                     }
-                    ts.forEach(nodes, function (node) {
-                        if (ts.getModifierFlags(node) & modifierFlag) {
-                            ts.forEach(node.modifiers, function (child) { return pushKeywordIf(keywords, child, modifier); });
+                }
+            }
+            /**
+             * `import x = require("./x") or `import * as x from "./x"`.
+             * An `export =` may be imported by this syntax, so it may be a direct import.
+             * If it's not a direct import, it will be in `indirectUsers`, so we don't have to do anything here.
+             */
+            function handleNamespaceImportLike(importName) {
+                // Don't rename an import that already has a different name than the export.
+                if (exportKind === 2 /* ExportEquals */ && (!isForRename || importName.text === exportName)) {
+                    addSearch(importName, checker.getSymbolAtLocation(importName));
+                }
+            }
+            function searchForNamedImport(namedBindings) {
+                if (namedBindings) {
+                    for (var _i = 0, _a = namedBindings.elements; _i < _a.length; _i++) {
+                        var element = _a[_i];
+                        var name_64 = element.name, propertyName = element.propertyName;
+                        if ((propertyName || name_64).text !== exportName) {
+                            continue;
                         }
-                    });
-                    return ts.map(keywords, getHighlightSpanForNode);
-                    function getFlagFromModifier(modifier) {
-                        switch (modifier) {
-                            case 112 /* PublicKeyword */:
-                                return 4 /* Public */;
-                            case 110 /* PrivateKeyword */:
-                                return 8 /* Private */;
-                            case 111 /* ProtectedKeyword */:
-                                return 16 /* Protected */;
-                            case 113 /* StaticKeyword */:
-                                return 32 /* Static */;
-                            case 82 /* ExportKeyword */:
-                                return 1 /* Export */;
-                            case 122 /* DeclareKeyword */:
-                                return 2 /* Ambient */;
-                            case 115 /* AbstractKeyword */:
-                                return 128 /* Abstract */;
-                            default:
-                                ts.Debug.fail();
+                        if (propertyName) {
+                            // This is `import { foo as bar } from "./a"` or `export { foo as bar } from "./a"`. `foo` isn't a local in the file, so just add it as a single reference.
+                            singleReferences.push(propertyName);
+                            if (!isForRename) {
+                                // Search locally for `bar`.
+                                addSearch(name_64, checker.getSymbolAtLocation(name_64));
+                            }
+                        }
+                        else {
+                            var localSymbol = element.kind === 246 /* ExportSpecifier */ && element.propertyName
+                                ? checker.getExportSpecifierLocalTargetSymbol(element) // For re-exporting under a different name, we want to get the re-exported symbol.
+                                : checker.getSymbolAtLocation(name_64);
+                            addSearch(name_64, localSymbol);
                         }
                     }
                 }
-                function pushKeywordIf(keywordList, token) {
-                    var expected = [];
-                    for (var _i = 2; _i < arguments.length; _i++) {
-                        expected[_i - 2] = arguments[_i];
-                    }
-                    if (token && ts.contains(expected, token.kind)) {
-                        keywordList.push(token);
+            }
+        }
+        /** Returns 'true' is the namespace 'name' is re-exported from this module, and 'false' if it is only used locally. */
+        function findNamespaceReExports(sourceFileLike, name, checker) {
+            var namespaceImportSymbol = checker.getSymbolAtLocation(name);
+            return forEachPossibleImportOrExportStatement(sourceFileLike, function (statement) {
+                if (statement.kind !== 244 /* ExportDeclaration */)
+                    return;
+                var _a = statement, exportClause = _a.exportClause, moduleSpecifier = _a.moduleSpecifier;
+                if (moduleSpecifier || !exportClause)
+                    return;
+                for (var _i = 0, _b = exportClause.elements; _i < _b.length; _i++) {
+                    var element = _b[_i];
+                    if (checker.getExportSpecifierLocalTargetSymbol(element) === namespaceImportSymbol) {
                         return true;
                     }
-                    return false;
-                }
-                function getGetAndSetOccurrences(accessorDeclaration) {
-                    var keywords = [];
-                    tryPushAccessorKeyword(accessorDeclaration.symbol, 149 /* GetAccessor */);
-                    tryPushAccessorKeyword(accessorDeclaration.symbol, 150 /* SetAccessor */);
-                    return ts.map(keywords, getHighlightSpanForNode);
-                    function tryPushAccessorKeyword(accessorSymbol, accessorKind) {
-                        var accessor = ts.getDeclarationOfKind(accessorSymbol, accessorKind);
-                        if (accessor) {
-                            ts.forEach(accessor.getChildren(), function (child) { return pushKeywordIf(keywords, child, 123 /* GetKeyword */, 131 /* SetKeyword */); });
-                        }
-                    }
                 }
-                function getConstructorOccurrences(constructorDeclaration) {
-                    var declarations = constructorDeclaration.symbol.getDeclarations();
-                    var keywords = [];
-                    ts.forEach(declarations, function (declaration) {
-                        ts.forEach(declaration.getChildren(), function (token) {
-                            return pushKeywordIf(keywords, token, 121 /* ConstructorKeyword */);
-                        });
-                    });
-                    return ts.map(keywords, getHighlightSpanForNode);
-                }
-                function getLoopBreakContinueOccurrences(loopNode) {
-                    var keywords = [];
-                    if (pushKeywordIf(keywords, loopNode.getFirstToken(), 86 /* ForKeyword */, 104 /* WhileKeyword */, 79 /* DoKeyword */)) {
-                        // If we succeeded and got a do-while loop, then start looking for a 'while' keyword.
-                        if (loopNode.kind === 204 /* DoStatement */) {
-                            var loopTokens = loopNode.getChildren();
-                            for (var i = loopTokens.length - 1; i >= 0; i--) {
-                                if (pushKeywordIf(keywords, loopTokens[i], 104 /* WhileKeyword */)) {
-                                    break;
-                                }
-                            }
+            });
+        }
+        function findModuleReferences(program, sourceFiles, searchModuleSymbol) {
+            var refs = [];
+            var checker = program.getTypeChecker();
+            for (var _i = 0, sourceFiles_4 = sourceFiles; _i < sourceFiles_4.length; _i++) {
+                var referencingFile = sourceFiles_4[_i];
+                var searchSourceFile = searchModuleSymbol.valueDeclaration;
+                if (searchSourceFile.kind === 265 /* SourceFile */) {
+                    for (var _a = 0, _b = referencingFile.referencedFiles; _a < _b.length; _a++) {
+                        var ref = _b[_a];
+                        if (program.getSourceFileFromReference(referencingFile, ref) === searchSourceFile) {
+                            refs.push({ kind: "reference", referencingFile: referencingFile, ref: ref });
                         }
                     }
-                    var breaksAndContinues = aggregateAllBreakAndContinueStatements(loopNode.statement);
-                    ts.forEach(breaksAndContinues, function (statement) {
-                        if (ownsBreakOrContinueStatement(loopNode, statement)) {
-                            pushKeywordIf(keywords, statement.getFirstToken(), 70 /* BreakKeyword */, 75 /* ContinueKeyword */);
-                        }
-                    });
-                    return ts.map(keywords, getHighlightSpanForNode);
-                }
-                function getBreakOrContinueStatementOccurrences(breakOrContinueStatement) {
-                    var owner = getBreakOrContinueOwner(breakOrContinueStatement);
-                    if (owner) {
-                        switch (owner.kind) {
-                            case 206 /* ForStatement */:
-                            case 207 /* ForInStatement */:
-                            case 208 /* ForOfStatement */:
-                            case 204 /* DoStatement */:
-                            case 205 /* WhileStatement */:
-                                return getLoopBreakContinueOccurrences(owner);
-                            case 213 /* SwitchStatement */:
-                                return getSwitchCaseDefaultOccurrences(owner);
+                    for (var _c = 0, _d = referencingFile.typeReferenceDirectives; _c < _d.length; _c++) {
+                        var ref = _d[_c];
+                        var referenced = program.getResolvedTypeReferenceDirectives().get(ref.fileName);
+                        if (referenced !== undefined && referenced.resolvedFileName === searchSourceFile.fileName) {
+                            refs.push({ kind: "reference", referencingFile: referencingFile, ref: ref });
                         }
                     }
-                    return undefined;
-                }
-                function getSwitchCaseDefaultOccurrences(switchStatement) {
-                    var keywords = [];
-                    pushKeywordIf(keywords, switchStatement.getFirstToken(), 96 /* SwitchKeyword */);
-                    // Go through each clause in the switch statement, collecting the 'case'/'default' keywords.
-                    ts.forEach(switchStatement.caseBlock.clauses, function (clause) {
-                        pushKeywordIf(keywords, clause.getFirstToken(), 71 /* CaseKeyword */, 77 /* DefaultKeyword */);
-                        var breaksAndContinues = aggregateAllBreakAndContinueStatements(clause);
-                        ts.forEach(breaksAndContinues, function (statement) {
-                            if (ownsBreakOrContinueStatement(switchStatement, statement)) {
-                                pushKeywordIf(keywords, statement.getFirstToken(), 70 /* BreakKeyword */);
-                            }
-                        });
-                    });
-                    return ts.map(keywords, getHighlightSpanForNode);
                 }
-                function getTryCatchFinallyOccurrences(tryStatement) {
-                    var keywords = [];
-                    pushKeywordIf(keywords, tryStatement.getFirstToken(), 100 /* TryKeyword */);
-                    if (tryStatement.catchClause) {
-                        pushKeywordIf(keywords, tryStatement.catchClause.getFirstToken(), 72 /* CatchKeyword */);
+                forEachImport(referencingFile, function (_importDecl, moduleSpecifier) {
+                    var moduleSymbol = checker.getSymbolAtLocation(moduleSpecifier);
+                    if (moduleSymbol === searchModuleSymbol) {
+                        refs.push({ kind: "import", literal: moduleSpecifier });
                     }
-                    if (tryStatement.finallyBlock) {
-                        var finallyKeyword = ts.findChildOfKind(tryStatement, 85 /* FinallyKeyword */, sourceFile);
-                        pushKeywordIf(keywords, finallyKeyword, 85 /* FinallyKeyword */);
+                });
+            }
+            return refs;
+        }
+        FindAllReferences.findModuleReferences = findModuleReferences;
+        /** Returns a map from a module symbol Id to all import statements that directly reference the module. */
+        function getDirectImportsMap(sourceFiles, checker, cancellationToken) {
+            var map = ts.createMap();
+            for (var _i = 0, sourceFiles_5 = sourceFiles; _i < sourceFiles_5.length; _i++) {
+                var sourceFile = sourceFiles_5[_i];
+                cancellationToken.throwIfCancellationRequested();
+                forEachImport(sourceFile, function (importDecl, moduleSpecifier) {
+                    var moduleSymbol = checker.getSymbolAtLocation(moduleSpecifier);
+                    if (moduleSymbol) {
+                        var id = ts.getSymbolId(moduleSymbol).toString();
+                        var imports = map.get(id);
+                        if (!imports) {
+                            map.set(id, imports = []);
+                        }
+                        imports.push(importDecl);
                     }
-                    return ts.map(keywords, getHighlightSpanForNode);
+                });
+            }
+            return map;
+        }
+        /** Iterates over all statements at the top level or in module declarations. Returns the first truthy result. */
+        function forEachPossibleImportOrExportStatement(sourceFileLike, action) {
+            return ts.forEach(sourceFileLike.kind === 265 /* SourceFile */ ? sourceFileLike.statements : sourceFileLike.body.statements, function (statement) {
+                return action(statement) || (isAmbientModuleDeclaration(statement) && ts.forEach(statement.body && statement.body.statements, action));
+            });
+        }
+        /** Calls `action` for each import, re-export, or require() in a file. */
+        function forEachImport(sourceFile, action) {
+            if (sourceFile.externalModuleIndicator || sourceFile.imports !== undefined) {
+                for (var _i = 0, _a = sourceFile.imports; _i < _a.length; _i++) {
+                    var moduleSpecifier = _a[_i];
+                    action(importerFromModuleSpecifier(moduleSpecifier), moduleSpecifier);
                 }
-                function getThrowOccurrences(throwStatement) {
-                    var owner = getThrowStatementOwner(throwStatement);
-                    if (!owner) {
-                        return undefined;
+            }
+            else {
+                forEachPossibleImportOrExportStatement(sourceFile, function (statement) {
+                    switch (statement.kind) {
+                        case 244 /* ExportDeclaration */:
+                        case 238 /* ImportDeclaration */: {
+                            var decl = statement;
+                            if (decl.moduleSpecifier && decl.moduleSpecifier.kind === 9 /* StringLiteral */) {
+                                action(decl, decl.moduleSpecifier);
+                            }
+                            break;
+                        }
+                        case 237 /* ImportEqualsDeclaration */: {
+                            var decl = statement;
+                            var moduleReference = decl.moduleReference;
+                            if (moduleReference.kind === 248 /* ExternalModuleReference */ &&
+                                moduleReference.expression.kind === 9 /* StringLiteral */) {
+                                action(decl, moduleReference.expression);
+                            }
+                            break;
+                        }
                     }
-                    var keywords = [];
-                    ts.forEach(aggregateOwnedThrowStatements(owner), function (throwStatement) {
-                        pushKeywordIf(keywords, throwStatement.getFirstToken(), 98 /* ThrowKeyword */);
-                    });
-                    // If the "owner" is a function, then we equate 'return' and 'throw' statements in their
-                    // ability to "jump out" of the function, and include occurrences for both.
-                    if (ts.isFunctionBlock(owner)) {
-                        ts.forEachReturnStatement(owner, function (returnStatement) {
-                            pushKeywordIf(keywords, returnStatement.getFirstToken(), 94 /* ReturnKeyword */);
-                        });
+                });
+            }
+        }
+        function importerFromModuleSpecifier(moduleSpecifier) {
+            var decl = moduleSpecifier.parent;
+            switch (decl.kind) {
+                case 181 /* CallExpression */:
+                case 238 /* ImportDeclaration */:
+                case 244 /* ExportDeclaration */:
+                    return decl;
+                case 248 /* ExternalModuleReference */:
+                    return decl.parent;
+                default:
+                    ts.Debug.fail("Unexpected module specifier parent: " + decl.kind);
+            }
+        }
+        /**
+         * Given a local reference, we might notice that it's an import/export and recursively search for references of that.
+         * If at an import, look locally for the symbol it imports.
+         * If an an export, look for all imports of it.
+         * This doesn't handle export specifiers; that is done in `getReferencesAtExportSpecifier`.
+         * @param comingFromExport If we are doing a search for all exports, don't bother looking backwards for the imported symbol, since that's the reason we're here.
+         */
+        function getImportOrExportSymbol(node, symbol, checker, comingFromExport) {
+            return comingFromExport ? getExport() : getExport() || getImport();
+            function getExport() {
+                var parent = node.parent;
+                if (symbol.flags & 7340032 /* Export */) {
+                    if (parent.kind === 179 /* PropertyAccessExpression */) {
+                        // When accessing an export of a JS module, there's no alias. The symbol will still be flagged as an export even though we're at the use.
+                        // So check that we are at the declaration.
+                        return symbol.declarations.some(function (d) { return d === parent; }) && ts.isBinaryExpression(parent.parent)
+                            ? getSpecialPropertyExport(parent.parent, /*useLhsSymbol*/ false)
+                            : undefined;
                     }
-                    return ts.map(keywords, getHighlightSpanForNode);
-                }
-                function getReturnOccurrences(returnStatement) {
-                    var func = ts.getContainingFunction(returnStatement);
-                    // If we didn't find a containing function with a block body, bail out.
-                    if (!(func && hasKind(func.body, 199 /* Block */))) {
-                        return undefined;
+                    else {
+                        var exportSymbol = symbol.exportSymbol;
+                        ts.Debug.assert(!!exportSymbol);
+                        return exportInfo(exportSymbol, getExportKindForDeclaration(parent));
                     }
-                    var keywords = [];
-                    ts.forEachReturnStatement(func.body, function (returnStatement) {
-                        pushKeywordIf(keywords, returnStatement.getFirstToken(), 94 /* ReturnKeyword */);
-                    });
-                    // Include 'throw' statements that do not occur within a try block.
-                    ts.forEach(aggregateOwnedThrowStatements(func.body), function (throwStatement) {
-                        pushKeywordIf(keywords, throwStatement.getFirstToken(), 98 /* ThrowKeyword */);
-                    });
-                    return ts.map(keywords, getHighlightSpanForNode);
-                }
-                function getIfElseOccurrences(ifStatement) {
-                    var keywords = [];
-                    // Traverse upwards through all parent if-statements linked by their else-branches.
-                    while (hasKind(ifStatement.parent, 203 /* IfStatement */) && ifStatement.parent.elseStatement === ifStatement) {
-                        ifStatement = ifStatement.parent;
-                    }
-                    // Now traverse back down through the else branches, aggregating if/else keywords of if-statements.
-                    while (ifStatement) {
-                        var children = ifStatement.getChildren();
-                        pushKeywordIf(keywords, children[0], 88 /* IfKeyword */);
-                        // Generally the 'else' keyword is second-to-last, so we traverse backwards.
-                        for (var i = children.length - 1; i >= 0; i--) {
-                            if (pushKeywordIf(keywords, children[i], 80 /* ElseKeyword */)) {
-                                break;
+                }
+                else {
+                    var exportNode = getExportNode(parent);
+                    if (exportNode && ts.hasModifier(exportNode, 1 /* Export */)) {
+                        if (ts.isImportEqualsDeclaration(exportNode) && exportNode.moduleReference === node) {
+                            // We're at `Y` in `export import X = Y`. This is not the exported symbol, the left-hand-side is. So treat this as an import statement.
+                            if (comingFromExport) {
+                                return undefined;
                             }
+                            var lhsSymbol = checker.getSymbolAtLocation(exportNode.name);
+                            return { kind: 0 /* Import */, symbol: lhsSymbol, isNamedImport: false };
                         }
-                        if (!hasKind(ifStatement.elseStatement, 203 /* IfStatement */)) {
-                            break;
+                        else {
+                            return exportInfo(symbol, getExportKindForDeclaration(exportNode));
                         }
-                        ifStatement = ifStatement.elseStatement;
                     }
-                    var result = [];
-                    // We'd like to highlight else/ifs together if they are only separated by whitespace
-                    // (i.e. the keywords are separated by no comments, no newlines).
-                    for (var i = 0; i < keywords.length; i++) {
-                        if (keywords[i].kind === 80 /* ElseKeyword */ && i < keywords.length - 1) {
-                            var elseKeyword = keywords[i];
-                            var ifKeyword = keywords[i + 1]; // this *should* always be an 'if' keyword.
-                            var shouldCombindElseAndIf = true;
-                            // Avoid recalculating getStart() by iterating backwards.
-                            for (var j = ifKeyword.getStart() - 1; j >= elseKeyword.end; j--) {
-                                if (!ts.isWhiteSpaceSingleLine(sourceFile.text.charCodeAt(j))) {
-                                    shouldCombindElseAndIf = false;
-                                    break;
-                                }
-                            }
-                            if (shouldCombindElseAndIf) {
-                                result.push({
-                                    fileName: fileName,
-                                    textSpan: ts.createTextSpanFromBounds(elseKeyword.getStart(), ifKeyword.end),
-                                    kind: ts.HighlightSpanKind.reference
-                                });
-                                i++; // skip the next keyword
-                                continue;
-                            }
-                        }
-                        // Ordinary case: just highlight the keyword.
-                        result.push(getHighlightSpanForNode(keywords[i]));
+                    else if (ts.isExportAssignment(parent)) {
+                        return getExportAssignmentExport(parent);
                     }
-                    return result;
+                    else if (ts.isExportAssignment(parent.parent)) {
+                        return getExportAssignmentExport(parent.parent);
+                    }
+                    else if (ts.isBinaryExpression(parent)) {
+                        return getSpecialPropertyExport(parent, /*useLhsSymbol*/ true);
+                    }
+                    else if (ts.isBinaryExpression(parent.parent)) {
+                        return getSpecialPropertyExport(parent.parent, /*useLhsSymbol*/ true);
+                    }
+                }
+                function getExportAssignmentExport(ex) {
+                    // Get the symbol for the `export =` node; its parent is the module it's the export of.
+                    var exportingModuleSymbol = ex.symbol.parent;
+                    ts.Debug.assert(!!exportingModuleSymbol);
+                    return { kind: 1 /* Export */, symbol: symbol, exportInfo: { exportingModuleSymbol: exportingModuleSymbol, exportKind: 2 /* ExportEquals */ } };
+                }
+                function getSpecialPropertyExport(node, useLhsSymbol) {
+                    var kind;
+                    switch (ts.getSpecialPropertyAssignmentKind(node)) {
+                        case 1 /* ExportsProperty */:
+                            kind = 0 /* Named */;
+                            break;
+                        case 2 /* ModuleExports */:
+                            kind = 2 /* ExportEquals */;
+                            break;
+                        default:
+                            return undefined;
+                    }
+                    var sym = useLhsSymbol ? checker.getSymbolAtLocation(node.left.name) : symbol;
+                    return sym && exportInfo(sym, kind);
+                }
+            }
+            function getImport() {
+                var isImport = isNodeImport(node);
+                if (!isImport)
+                    return undefined;
+                // A symbol being imported is always an alias. So get what that aliases to find the local symbol.
+                var importedSymbol = checker.getImmediateAliasedSymbol(symbol);
+                if (!importedSymbol)
+                    return undefined;
+                // Search on the local symbol in the exporting module, not the exported symbol.
+                importedSymbol = skipExportSpecifierSymbol(importedSymbol, checker);
+                // Similarly, skip past the symbol for 'export ='
+                if (importedSymbol.name === "export=") {
+                    importedSymbol = getExportEqualsLocalSymbol(importedSymbol, checker);
+                }
+                if (symbolName(importedSymbol) === symbol.name) {
+                    return __assign({ kind: 0 /* Import */, symbol: importedSymbol }, isImport);
                 }
             }
+            function exportInfo(symbol, kind) {
+                var exportInfo = getExportInfo(symbol, kind, checker);
+                return exportInfo && { kind: 1 /* Export */, symbol: symbol, exportInfo: exportInfo };
+            }
+            // Not meant for use with export specifiers or export assignment.
+            function getExportKindForDeclaration(node) {
+                return ts.hasModifier(node, 512 /* Default */) ? 1 /* Default */ : 0 /* Named */;
+            }
         }
-        DocumentHighlights.getDocumentHighlights = getDocumentHighlights;
-        /**
-         * Whether or not a 'node' is preceded by a label of the given string.
-         * Note: 'node' cannot be a SourceFile.
-         */
-        function isLabeledBy(node, labelName) {
-            for (var owner = node.parent; owner.kind === 214 /* LabeledStatement */; owner = owner.parent) {
-                if (owner.label.text === labelName) {
-                    return true;
+        FindAllReferences.getImportOrExportSymbol = getImportOrExportSymbol;
+        function getExportEqualsLocalSymbol(importedSymbol, checker) {
+            if (importedSymbol.flags & 8388608 /* Alias */) {
+                return checker.getImmediateAliasedSymbol(importedSymbol);
+            }
+            var decl = importedSymbol.valueDeclaration;
+            if (ts.isExportAssignment(decl)) {
+                return decl.expression.symbol;
+            }
+            else if (ts.isBinaryExpression(decl)) {
+                return decl.right.symbol;
+            }
+            ts.Debug.fail();
+        }
+        // If a reference is a class expression, the exported node would be its parent.
+        // If a reference is a variable declaration, the exported node would be the variable statement.
+        function getExportNode(parent) {
+            if (parent.kind === 226 /* VariableDeclaration */) {
+                var p = parent;
+                return p.parent.kind === 260 /* CatchClause */ ? undefined : p.parent.parent.kind === 208 /* VariableStatement */ ? p.parent.parent : undefined;
+            }
+            else {
+                return parent;
+            }
+        }
+        function isNodeImport(node) {
+            var parent = node.parent;
+            switch (parent.kind) {
+                case 237 /* ImportEqualsDeclaration */:
+                    return parent.name === node && isExternalModuleImportEquals(parent)
+                        ? { isNamedImport: false }
+                        : undefined;
+                case 242 /* ImportSpecifier */:
+                    // For a rename import `{ foo as bar }`, don't search for the imported symbol. Just find local uses of `bar`.
+                    return parent.propertyName ? undefined : { isNamedImport: true };
+                case 239 /* ImportClause */:
+                case 240 /* NamespaceImport */:
+                    ts.Debug.assert(parent.name === node);
+                    return { isNamedImport: false };
+                default:
+                    return undefined;
+            }
+        }
+        function getExportInfo(exportSymbol, exportKind, checker) {
+            var exportingModuleSymbol = checker.getMergedSymbol(exportSymbol.parent); // Need to get merged symbol in case there's an augmentation.
+            // `export` may appear in a namespace. In that case, just rely on global search.
+            return ts.isExternalModuleSymbol(exportingModuleSymbol) ? { exportingModuleSymbol: exportingModuleSymbol, exportKind: exportKind } : undefined;
+        }
+        FindAllReferences.getExportInfo = getExportInfo;
+        function symbolName(symbol) {
+            if (symbol.name !== "default") {
+                return symbol.name;
+            }
+            return ts.forEach(symbol.declarations, function (decl) {
+                if (ts.isExportAssignment(decl)) {
+                    return ts.isIdentifier(decl.expression) ? decl.expression.text : undefined;
+                }
+                var name = ts.getNameOfDeclaration(decl);
+                return name && name.kind === 71 /* Identifier */ && name.text;
+            });
+        }
+        /** If at an export specifier, go to the symbol it refers to. */
+        function skipExportSpecifierSymbol(symbol, checker) {
+            // For `export { foo } from './bar", there's nothing to skip, because it does  not create a new alias. But `export { foo } does.
+            if (symbol.declarations) {
+                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                    var declaration = _a[_i];
+                    if (ts.isExportSpecifier(declaration) && !declaration.propertyName && !declaration.parent.parent.moduleSpecifier) {
+                        return checker.getExportSpecifierLocalTargetSymbol(declaration);
+                    }
                 }
             }
-            return false;
+            return symbol;
         }
-    })(DocumentHighlights = ts.DocumentHighlights || (ts.DocumentHighlights = {}));
+        function getContainingModuleSymbol(importer, checker) {
+            return checker.getMergedSymbol(getSourceFileLikeForImportDeclaration(importer).symbol);
+        }
+        function getSourceFileLikeForImportDeclaration(node) {
+            if (node.kind === 181 /* CallExpression */) {
+                return node.getSourceFile();
+            }
+            var parent = node.parent;
+            if (parent.kind === 265 /* SourceFile */) {
+                return parent;
+            }
+            ts.Debug.assert(parent.kind === 234 /* ModuleBlock */ && isAmbientModuleDeclaration(parent.parent));
+            return parent.parent;
+        }
+        function isAmbientModuleDeclaration(node) {
+            return node.kind === 233 /* ModuleDeclaration */ && node.name.kind === 9 /* StringLiteral */;
+        }
+        function isExternalModuleImportEquals(_a) {
+            var moduleReference = _a.moduleReference;
+            return moduleReference.kind === 248 /* ExternalModuleReference */ && moduleReference.expression.kind === 9 /* StringLiteral */;
+        }
+    })(FindAllReferences = ts.FindAllReferences || (ts.FindAllReferences = {}));
 })(ts || (ts = {}));
+/// <reference path="./importTracker.ts" />
+/* @internal */
 var ts;
 (function (ts) {
-    function createDocumentRegistry(useCaseSensitiveFileNames, currentDirectory) {
-        if (currentDirectory === void 0) { currentDirectory = ""; }
-        // Maps from compiler setting target (ES3, ES5, etc.) to all the cached documents we have
-        // for those settings.
-        var buckets = ts.createMap();
-        var getCanonicalFileName = ts.createGetCanonicalFileName(!!useCaseSensitiveFileNames);
-        function getKeyForCompilationSettings(settings) {
-            return "_" + settings.target + "|" + settings.module + "|" + settings.noResolve + "|" + settings.jsx + "|" + settings.allowJs + "|" + settings.baseUrl + "|" + JSON.stringify(settings.typeRoots) + "|" + JSON.stringify(settings.rootDirs) + "|" + JSON.stringify(settings.paths);
+    var FindAllReferences;
+    (function (FindAllReferences) {
+        function nodeEntry(node, isInString) {
+            return { type: "node", node: node, isInString: isInString };
         }
-        function getBucketForCompilationSettings(key, createIfMissing) {
-            var bucket = buckets[key];
-            if (!bucket && createIfMissing) {
-                buckets[key] = bucket = ts.createFileMap();
+        FindAllReferences.nodeEntry = nodeEntry;
+        function findReferencedSymbols(program, cancellationToken, sourceFiles, sourceFile, position) {
+            var referencedSymbols = findAllReferencedSymbols(program, cancellationToken, sourceFiles, sourceFile, position);
+            if (!referencedSymbols || !referencedSymbols.length) {
+                return undefined;
             }
-            return bucket;
+            var out = [];
+            var checker = program.getTypeChecker();
+            for (var _i = 0, referencedSymbols_1 = referencedSymbols; _i < referencedSymbols_1.length; _i++) {
+                var _a = referencedSymbols_1[_i], definition = _a.definition, references = _a.references;
+                // Only include referenced symbols that have a valid definition.
+                if (definition) {
+                    out.push({ definition: definitionToReferencedSymbolDefinitionInfo(definition, checker), references: references.map(toReferenceEntry) });
+                }
+            }
+            return out;
         }
-        function reportStats() {
-            var bucketInfoArray = Object.keys(buckets).filter(function (name) { return name && name.charAt(0) === "_"; }).map(function (name) {
-                var entries = buckets[name];
-                var sourceFiles = [];
-                entries.forEachValue(function (key, entry) {
-                    sourceFiles.push({
-                        name: key,
-                        refCount: entry.languageServiceRefCount,
-                        references: entry.owners.slice(0)
-                    });
-                });
-                sourceFiles.sort(function (x, y) { return y.refCount - x.refCount; });
-                return {
-                    bucket: name,
-                    sourceFiles: sourceFiles
-                };
-            });
-            return JSON.stringify(bucketInfoArray, undefined, 2);
+        FindAllReferences.findReferencedSymbols = findReferencedSymbols;
+        function getImplementationsAtPosition(program, cancellationToken, sourceFiles, sourceFile, position) {
+            // A node in a JSDoc comment can't have an implementation anyway.
+            var node = ts.getTouchingPropertyName(sourceFile, position, /*includeJsDocComment*/ false);
+            var referenceEntries = getImplementationReferenceEntries(program, cancellationToken, sourceFiles, node);
+            var checker = program.getTypeChecker();
+            return ts.map(referenceEntries, function (entry) { return toImplementationLocation(entry, checker); });
+        }
+        FindAllReferences.getImplementationsAtPosition = getImplementationsAtPosition;
+        function getImplementationReferenceEntries(program, cancellationToken, sourceFiles, node) {
+            if (node.kind === 265 /* SourceFile */) {
+                return undefined;
+            }
+            var checker = program.getTypeChecker();
+            // If invoked directly on a shorthand property assignment, then return
+            // the declaration of the symbol being assigned (not the symbol being assigned to).
+            if (node.parent.kind === 262 /* ShorthandPropertyAssignment */) {
+                var result_5 = [];
+                FindAllReferences.Core.getReferenceEntriesForShorthandPropertyAssignment(node, checker, function (node) { return result_5.push(nodeEntry(node)); });
+                return result_5;
+            }
+            else if (node.kind === 97 /* SuperKeyword */ || ts.isSuperProperty(node.parent)) {
+                // References to and accesses on the super keyword only have one possible implementation, so no
+                // need to "Find all References"
+                var symbol = checker.getSymbolAtLocation(node);
+                return symbol.valueDeclaration && [nodeEntry(symbol.valueDeclaration)];
+            }
+            else {
+                // Perform "Find all References" and retrieve only those that are implementations
+                return getReferenceEntriesForNode(node, program, sourceFiles, cancellationToken, { implementations: true });
+            }
         }
-        function acquireDocument(fileName, compilationSettings, scriptSnapshot, version, scriptKind) {
-            var path = ts.toPath(fileName, currentDirectory, getCanonicalFileName);
-            var key = getKeyForCompilationSettings(compilationSettings);
-            return acquireDocumentWithKey(fileName, path, compilationSettings, key, scriptSnapshot, version, scriptKind);
+        function findReferencedEntries(program, cancellationToken, sourceFiles, sourceFile, position, options) {
+            var x = flattenEntries(findAllReferencedSymbols(program, cancellationToken, sourceFiles, sourceFile, position, options));
+            return ts.map(x, toReferenceEntry);
         }
-        function acquireDocumentWithKey(fileName, path, compilationSettings, key, scriptSnapshot, version, scriptKind) {
-            return acquireOrUpdateDocument(fileName, path, compilationSettings, key, scriptSnapshot, version, /*acquiring*/ true, scriptKind);
+        FindAllReferences.findReferencedEntries = findReferencedEntries;
+        function getReferenceEntriesForNode(node, program, sourceFiles, cancellationToken, options) {
+            if (options === void 0) { options = {}; }
+            return flattenEntries(FindAllReferences.Core.getReferencedSymbolsForNode(node, program, sourceFiles, cancellationToken, options));
         }
-        function updateDocument(fileName, compilationSettings, scriptSnapshot, version, scriptKind) {
-            var path = ts.toPath(fileName, currentDirectory, getCanonicalFileName);
-            var key = getKeyForCompilationSettings(compilationSettings);
-            return updateDocumentWithKey(fileName, path, compilationSettings, key, scriptSnapshot, version, scriptKind);
+        FindAllReferences.getReferenceEntriesForNode = getReferenceEntriesForNode;
+        function findAllReferencedSymbols(program, cancellationToken, sourceFiles, sourceFile, position, options) {
+            var node = ts.getTouchingPropertyName(sourceFile, position, /*includeJsDocComment*/ true);
+            return FindAllReferences.Core.getReferencedSymbolsForNode(node, program, sourceFiles, cancellationToken, options);
+        }
+        function flattenEntries(referenceSymbols) {
+            return referenceSymbols && ts.flatMap(referenceSymbols, function (r) { return r.references; });
+        }
+        function definitionToReferencedSymbolDefinitionInfo(def, checker) {
+            var info = (function () {
+                switch (def.type) {
+                    case "symbol": {
+                        var symbol = def.symbol, node_2 = def.node;
+                        var _a = getDefinitionKindAndDisplayParts(symbol, node_2, checker), displayParts_1 = _a.displayParts, kind_1 = _a.kind;
+                        var name_65 = displayParts_1.map(function (p) { return p.text; }).join("");
+                        return { node: node_2, name: name_65, kind: kind_1, displayParts: displayParts_1 };
+                    }
+                    case "label": {
+                        var node_3 = def.node;
+                        return { node: node_3, name: node_3.text, kind: "label" /* label */, displayParts: [ts.displayPart(node_3.text, ts.SymbolDisplayPartKind.text)] };
+                    }
+                    case "keyword": {
+                        var node_4 = def.node;
+                        var name_66 = ts.tokenToString(node_4.kind);
+                        return { node: node_4, name: name_66, kind: "keyword" /* keyword */, displayParts: [{ text: name_66, kind: "keyword" /* keyword */ }] };
+                    }
+                    case "this": {
+                        var node_5 = def.node;
+                        var symbol = checker.getSymbolAtLocation(node_5);
+                        var displayParts_2 = symbol && ts.SymbolDisplay.getSymbolDisplayPartsDocumentationAndSymbolKind(checker, symbol, node_5.getSourceFile(), ts.getContainerNode(node_5), node_5).displayParts;
+                        return { node: node_5, name: "this", kind: "var" /* variableElement */, displayParts: displayParts_2 };
+                    }
+                    case "string": {
+                        var node_6 = def.node;
+                        return { node: node_6, name: node_6.text, kind: "var" /* variableElement */, displayParts: [ts.displayPart(ts.getTextOfNode(node_6), ts.SymbolDisplayPartKind.stringLiteral)] };
+                    }
+                }
+            })();
+            if (!info) {
+                return undefined;
+            }
+            var node = info.node, name = info.name, kind = info.kind, displayParts = info.displayParts;
+            var sourceFile = node.getSourceFile();
+            return {
+                containerKind: "" /* unknown */,
+                containerName: "",
+                fileName: sourceFile.fileName,
+                kind: kind,
+                name: name,
+                textSpan: ts.createTextSpanFromNode(node, sourceFile),
+                displayParts: displayParts
+            };
         }
-        function updateDocumentWithKey(fileName, path, compilationSettings, key, scriptSnapshot, version, scriptKind) {
-            return acquireOrUpdateDocument(fileName, path, compilationSettings, key, scriptSnapshot, version, /*acquiring*/ false, scriptKind);
+        function getDefinitionKindAndDisplayParts(symbol, node, checker) {
+            var _a = ts.SymbolDisplay.getSymbolDisplayPartsDocumentationAndSymbolKind(checker, symbol, node.getSourceFile(), ts.getContainerNode(node), node), displayParts = _a.displayParts, symbolKind = _a.symbolKind;
+            return { displayParts: displayParts, kind: symbolKind };
         }
-        function acquireOrUpdateDocument(fileName, path, compilationSettings, key, scriptSnapshot, version, acquiring, scriptKind) {
-            var bucket = getBucketForCompilationSettings(key, /*createIfMissing*/ true);
-            var entry = bucket.get(path);
-            if (!entry) {
-                ts.Debug.assert(acquiring, "How could we be trying to update a document that the registry doesn't have?");
-                // Have never seen this file with these settings.  Create a new source file for it.
-                var sourceFile = ts.createLanguageServiceSourceFile(fileName, scriptSnapshot, compilationSettings.target, version, /*setNodeParents*/ false, scriptKind);
-                entry = {
-                    sourceFile: sourceFile,
-                    languageServiceRefCount: 0,
-                    owners: []
+        function toReferenceEntry(entry) {
+            if (entry.type === "span") {
+                return { textSpan: entry.textSpan, fileName: entry.fileName, isWriteAccess: false, isDefinition: false };
+            }
+            var node = entry.node, isInString = entry.isInString;
+            return {
+                fileName: node.getSourceFile().fileName,
+                textSpan: getTextSpan(node),
+                isWriteAccess: isWriteAccess(node),
+                isDefinition: ts.isAnyDeclarationName(node) || ts.isLiteralComputedPropertyDeclarationName(node),
+                isInString: isInString
+            };
+        }
+        function toImplementationLocation(entry, checker) {
+            if (entry.type === "node") {
+                var node = entry.node;
+                return __assign({ textSpan: getTextSpan(node), fileName: node.getSourceFile().fileName }, implementationKindDisplayParts(node, checker));
+            }
+            else {
+                var textSpan = entry.textSpan, fileName = entry.fileName;
+                return { textSpan: textSpan, fileName: fileName, kind: "" /* unknown */, displayParts: [] };
+            }
+        }
+        function implementationKindDisplayParts(node, checker) {
+            var symbol = checker.getSymbolAtLocation(ts.isDeclaration(node) && node.name ? node.name : node);
+            if (symbol) {
+                return getDefinitionKindAndDisplayParts(symbol, node, checker);
+            }
+            else if (node.kind === 178 /* ObjectLiteralExpression */) {
+                return {
+                    kind: "interface" /* interfaceElement */,
+                    displayParts: [ts.punctuationPart(19 /* OpenParenToken */), ts.textPart("object literal"), ts.punctuationPart(20 /* CloseParenToken */)]
+                };
+            }
+            else if (node.kind === 199 /* ClassExpression */) {
+                return {
+                    kind: "local class" /* localClassElement */,
+                    displayParts: [ts.punctuationPart(19 /* OpenParenToken */), ts.textPart("anonymous local class"), ts.punctuationPart(20 /* CloseParenToken */)]
                 };
-                bucket.set(path, entry);
             }
             else {
-                // We have an entry for this file.  However, it may be for a different version of
-                // the script snapshot.  If so, update it appropriately.  Otherwise, we can just
-                // return it as is.
-                if (entry.sourceFile.version !== version) {
-                    entry.sourceFile = ts.updateLanguageServiceSourceFile(entry.sourceFile, scriptSnapshot, version, scriptSnapshot.getChangeRange(entry.sourceFile.scriptSnapshot));
-                }
+                return { kind: ts.getNodeKind(node), displayParts: [] };
             }
-            // If we're acquiring, then this is the first time this LS is asking for this document.
-            // Increase our ref count so we know there's another LS using the document.  If we're
-            // not acquiring, then that means the LS is 'updating' the file instead, and that means
-            // it has already acquired the document previously.  As such, we do not need to increase
-            // the ref count.
-            if (acquiring) {
-                entry.languageServiceRefCount++;
+        }
+        function toHighlightSpan(entry) {
+            if (entry.type === "span") {
+                var fileName_1 = entry.fileName, textSpan = entry.textSpan;
+                return { fileName: fileName_1, span: { textSpan: textSpan, kind: "reference" /* reference */ } };
             }
-            return entry.sourceFile;
+            var node = entry.node, isInString = entry.isInString;
+            var fileName = entry.node.getSourceFile().fileName;
+            var writeAccess = isWriteAccess(node);
+            var span = {
+                textSpan: getTextSpan(node),
+                kind: writeAccess ? "writtenReference" /* writtenReference */ : "reference" /* reference */,
+                isInString: isInString
+            };
+            return { fileName: fileName, span: span };
         }
-        function releaseDocument(fileName, compilationSettings) {
-            var path = ts.toPath(fileName, currentDirectory, getCanonicalFileName);
-            var key = getKeyForCompilationSettings(compilationSettings);
-            return releaseDocumentWithKey(path, key);
+        FindAllReferences.toHighlightSpan = toHighlightSpan;
+        function getTextSpan(node) {
+            var start = node.getStart();
+            var end = node.getEnd();
+            if (node.kind === 9 /* StringLiteral */) {
+                start += 1;
+                end -= 1;
+            }
+            return ts.createTextSpanFromBounds(start, end);
         }
-        function releaseDocumentWithKey(path, key) {
-            var bucket = getBucketForCompilationSettings(key, /*createIfMissing*/ false);
-            ts.Debug.assert(bucket !== undefined);
-            var entry = bucket.get(path);
-            entry.languageServiceRefCount--;
-            ts.Debug.assert(entry.languageServiceRefCount >= 0);
-            if (entry.languageServiceRefCount === 0) {
-                bucket.remove(path);
+        /** A node is considered a writeAccess iff it is a name of a declaration or a target of an assignment */
+        function isWriteAccess(node) {
+            if (ts.isAnyDeclarationName(node)) {
+                return true;
+            }
+            var parent = node.parent;
+            switch (parent && parent.kind) {
+                case 193 /* PostfixUnaryExpression */:
+                case 192 /* PrefixUnaryExpression */:
+                    return true;
+                case 194 /* BinaryExpression */:
+                    return parent.left === node && ts.isAssignmentOperator(parent.operatorToken.kind);
+                default:
+                    return false;
             }
         }
-        return {
-            acquireDocument: acquireDocument,
-            acquireDocumentWithKey: acquireDocumentWithKey,
-            updateDocument: updateDocument,
-            updateDocumentWithKey: updateDocumentWithKey,
-            releaseDocument: releaseDocument,
-            releaseDocumentWithKey: releaseDocumentWithKey,
-            reportStats: reportStats,
-            getKeyForCompilationSettings: getKeyForCompilationSettings
-        };
-    }
-    ts.createDocumentRegistry = createDocumentRegistry;
+    })(FindAllReferences = ts.FindAllReferences || (ts.FindAllReferences = {}));
 })(ts || (ts = {}));
+/** Encapsulates the core find-all-references algorithm. */
 /* @internal */
-var ts;
 (function (ts) {
     var FindAllReferences;
     (function (FindAllReferences) {
-        function findReferencedSymbols(typeChecker, cancellationToken, sourceFiles, sourceFile, position, findInStrings, findInComments) {
-            var node = ts.getTouchingPropertyName(sourceFile, position, /*includeJsDocComment*/ true);
-            if (node === sourceFile) {
-                return undefined;
+        var Core;
+        (function (Core) {
+            /** Core find-all-references algorithm. Handles special cases before delegating to `getReferencedSymbolsForSymbol`. */
+            function getReferencedSymbolsForNode(node, program, sourceFiles, cancellationToken, options) {
+                if (options === void 0) { options = {}; }
+                if (node.kind === 265 /* SourceFile */) {
+                    return undefined;
+                }
+                if (!options.implementations) {
+                    var special = getReferencedSymbolsSpecial(node, sourceFiles, cancellationToken);
+                    if (special) {
+                        return special;
+                    }
+                }
+                var checker = program.getTypeChecker();
+                var symbol = checker.getSymbolAtLocation(node);
+                // Could not find a symbol e.g. unknown identifier
+                if (!symbol) {
+                    // String literal might be a property (and thus have a symbol), so do this here rather than in getReferencedSymbolsSpecial.
+                    if (!options.implementations && node.kind === 9 /* StringLiteral */) {
+                        return getReferencesForStringLiteral(node, sourceFiles, cancellationToken);
+                    }
+                    // Can't have references to something that we have no symbol for.
+                    return undefined;
+                }
+                if (symbol.flags & 1536 /* Module */ && isModuleReferenceLocation(node)) {
+                    return getReferencedSymbolsForModule(program, symbol, sourceFiles);
+                }
+                return getReferencedSymbolsForSymbol(symbol, node, sourceFiles, checker, cancellationToken, options);
             }
-            switch (node.kind) {
-                case 8 /* NumericLiteral */:
-                    if (!ts.isLiteralNameOfPropertyDeclarationOrIndexAccess(node)) {
-                        break;
+            Core.getReferencedSymbolsForNode = getReferencedSymbolsForNode;
+            function isModuleReferenceLocation(node) {
+                if (node.kind !== 9 /* StringLiteral */) {
+                    return false;
+                }
+                switch (node.parent.kind) {
+                    case 233 /* ModuleDeclaration */:
+                    case 248 /* ExternalModuleReference */:
+                    case 238 /* ImportDeclaration */:
+                    case 244 /* ExportDeclaration */:
+                        return true;
+                    case 181 /* CallExpression */:
+                        return ts.isRequireCall(node.parent, /*checkArgumentIsStringLiteral*/ false) || ts.isImportCall(node.parent);
+                    default:
+                        return false;
+                }
+            }
+            function getReferencedSymbolsForModule(program, symbol, sourceFiles) {
+                ts.Debug.assert(!!symbol.valueDeclaration);
+                var references = FindAllReferences.findModuleReferences(program, sourceFiles, symbol).map(function (reference) {
+                    if (reference.kind === "import") {
+                        return { type: "node", node: reference.literal };
                     }
-                // Fallthrough
-                case 69 /* Identifier */:
-                case 97 /* ThisKeyword */:
-                // case SyntaxKind.SuperKeyword: TODO:GH#9268
-                case 121 /* ConstructorKeyword */:
-                case 9 /* StringLiteral */:
-                    return getReferencedSymbolsForNode(typeChecker, cancellationToken, node, sourceFiles, findInStrings, findInComments, /*implementations*/ false);
+                    else {
+                        return {
+                            type: "span",
+                            fileName: reference.referencingFile.fileName,
+                            textSpan: ts.createTextSpanFromRange(reference.ref),
+                        };
+                    }
+                });
+                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                    var decl = _a[_i];
+                    switch (decl.kind) {
+                        case 265 /* SourceFile */:
+                            // Don't include the source file itself. (This may not be ideal behavior, but awkward to include an entire file as a reference.)
+                            break;
+                        case 233 /* ModuleDeclaration */:
+                            references.push({ type: "node", node: decl.name });
+                            break;
+                        default:
+                            ts.Debug.fail("Expected a module symbol to be declared by a SourceFile or ModuleDeclaration.");
+                    }
+                }
+                return [{
+                        definition: { type: "symbol", symbol: symbol, node: symbol.valueDeclaration },
+                        references: references
+                    }];
             }
-            return undefined;
-        }
-        FindAllReferences.findReferencedSymbols = findReferencedSymbols;
-        function getReferencedSymbolsForNode(typeChecker, cancellationToken, node, sourceFiles, findInStrings, findInComments, implementations) {
-            if (!implementations) {
+            /** getReferencedSymbols for special node kinds. */
+            function getReferencedSymbolsSpecial(node, sourceFiles, cancellationToken) {
+                if (ts.isTypeKeyword(node.kind)) {
+                    return getAllReferencesForKeyword(sourceFiles, node.kind, cancellationToken);
+                }
                 // Labels
                 if (ts.isLabelName(node)) {
                     if (ts.isJumpStatementTarget(node)) {
                         var labelDefinition = ts.getTargetLabel(node.parent, node.text);
                         // if we have a label definition, look within its statement for references, if not, then
                         // the label is undefined and we have no results..
-                        return labelDefinition ? getLabelReferencesInNode(labelDefinition.parent, labelDefinition) : undefined;
+                        return labelDefinition && getLabelReferencesInNode(labelDefinition.parent, labelDefinition);
                     }
                     else {
                         // it is a label definition and not a target, search within the parent labeledStatement
@@ -65605,129 +79187,205 @@ var ts;
                     }
                 }
                 if (ts.isThis(node)) {
-                    return getReferencesForThisKeyword(node, sourceFiles);
+                    return getReferencesForThisKeyword(node, sourceFiles, cancellationToken);
                 }
-                if (node.kind === 95 /* SuperKeyword */) {
+                if (node.kind === 97 /* SuperKeyword */) {
                     return getReferencesForSuperKeyword(node);
                 }
-            }
-            // `getSymbolAtLocation` normally returns the symbol of the class when given the constructor keyword,
-            // so we have to specify that we want the constructor symbol.
-            var symbol = typeChecker.getSymbolAtLocation(node);
-            if (!implementations && !symbol && node.kind === 9 /* StringLiteral */) {
-                return getReferencesForStringLiteral(node, sourceFiles);
-            }
-            // Could not find a symbol e.g. unknown identifier
-            if (!symbol) {
-                // Can't have references to something that we have no symbol for.
-                return undefined;
-            }
-            var declarations = symbol.declarations;
-            // The symbol was an internal symbol and does not have a declaration e.g. undefined symbol
-            if (!declarations || !declarations.length) {
                 return undefined;
             }
-            var result;
-            // Compute the meaning from the location and the symbol it references
-            var searchMeaning = getIntersectingMeaningFromDeclarations(ts.getMeaningFromLocation(node), declarations);
-            // Get the text to search for.
-            // Note: if this is an external module symbol, the name doesn't include quotes.
-            var declaredName = ts.stripQuotes(ts.getDeclaredName(typeChecker, symbol, node));
-            // Try to get the smallest valid scope that we can limit our search to;
-            // otherwise we'll need to search globally (i.e. include each file).
-            var scope = getSymbolScope(symbol);
-            // Maps from a symbol ID to the ReferencedSymbol entry in 'result'.
-            var symbolToIndex = [];
-            if (scope) {
-                result = [];
-                getReferencesInNode(scope, symbol, declaredName, node, searchMeaning, findInStrings, findInComments, result, symbolToIndex);
-            }
-            else {
-                var internedName = getInternedName(symbol, node, declarations);
-                for (var _i = 0, sourceFiles_8 = sourceFiles; _i < sourceFiles_8.length; _i++) {
-                    var sourceFile = sourceFiles_8[_i];
-                    cancellationToken.throwIfCancellationRequested();
-                    var nameTable = ts.getNameTable(sourceFile);
-                    if (nameTable[internedName] !== undefined) {
-                        result = result || [];
-                        getReferencesInNode(sourceFile, symbol, declaredName, node, searchMeaning, findInStrings, findInComments, result, symbolToIndex);
+            /** Core find-all-references algorithm for a normal symbol. */
+            function getReferencedSymbolsForSymbol(symbol, node, sourceFiles, checker, cancellationToken, options) {
+                symbol = skipPastExportOrImportSpecifier(symbol, node, checker);
+                // Compute the meaning from the location and the symbol it references
+                var searchMeaning = getIntersectingMeaningFromDeclarations(ts.getMeaningFromLocation(node), symbol.declarations);
+                var result = [];
+                var state = new State(sourceFiles, /*isForConstructor*/ node.kind === 123 /* ConstructorKeyword */, checker, cancellationToken, searchMeaning, options, result);
+                var search = state.createSearch(node, symbol, /*comingFrom*/ undefined, { allSearchSymbols: populateSearchSymbolSet(symbol, node, checker, options.implementations) });
+                // Try to get the smallest valid scope that we can limit our search to;
+                // otherwise we'll need to search globally (i.e. include each file).
+                var scope = getSymbolScope(symbol);
+                if (scope) {
+                    getReferencesInContainer(scope, scope.getSourceFile(), search, state);
+                }
+                else {
+                    // Global search
+                    for (var _i = 0, _a = state.sourceFiles; _i < _a.length; _i++) {
+                        var sourceFile = _a[_i];
+                        state.cancellationToken.throwIfCancellationRequested();
+                        searchForName(sourceFile, search, state);
                     }
                 }
+                return result;
             }
-            return result;
-            function getDefinition(symbol) {
-                var info = ts.SymbolDisplay.getSymbolDisplayPartsDocumentationAndSymbolKind(typeChecker, symbol, node.getSourceFile(), ts.getContainerNode(node), node);
-                var name = ts.map(info.displayParts, function (p) { return p.text; }).join("");
-                var declarations = symbol.declarations;
-                if (!declarations || declarations.length === 0) {
-                    return undefined;
+            /** Handle a few special cases relating to export/import specifiers. */
+            function skipPastExportOrImportSpecifier(symbol, node, checker) {
+                var parent = node.parent;
+                if (ts.isExportSpecifier(parent)) {
+                    return getLocalSymbolForExportSpecifier(node, symbol, parent, checker);
                 }
-                return {
-                    containerKind: "",
-                    containerName: "",
-                    name: name,
-                    kind: info.symbolKind,
-                    fileName: declarations[0].getSourceFile().fileName,
-                    textSpan: ts.createTextSpan(declarations[0].getStart(), 0),
-                    displayParts: info.displayParts
-                };
+                if (ts.isImportSpecifier(parent) && parent.propertyName === node) {
+                    // We're at `foo` in `import { foo as bar }`. Probably intended to find all refs on the original, not just on the import.
+                    return checker.getImmediateAliasedSymbol(symbol);
+                }
+                return symbol;
             }
-            function getAliasSymbolForPropertyNameSymbol(symbol, location) {
-                if (symbol.flags & 8388608 /* Alias */) {
-                    // Default import get alias
-                    var defaultImport = ts.getDeclarationOfKind(symbol, 231 /* ImportClause */);
-                    if (defaultImport) {
-                        return typeChecker.getAliasedSymbol(symbol);
-                    }
-                    var importOrExportSpecifier = ts.forEach(symbol.declarations, function (declaration) { return (declaration.kind === 234 /* ImportSpecifier */ ||
-                        declaration.kind === 238 /* ExportSpecifier */) ? declaration : undefined; });
-                    if (importOrExportSpecifier &&
-                        // export { a }
-                        (!importOrExportSpecifier.propertyName ||
-                            // export {a as class } where a is location
-                            importOrExportSpecifier.propertyName === location)) {
-                        // If Import specifier -> get alias
-                        // else Export specifier -> get local target
-                        return importOrExportSpecifier.kind === 234 /* ImportSpecifier */ ?
-                            typeChecker.getAliasedSymbol(symbol) :
-                            typeChecker.getExportSpecifierLocalTargetSymbol(importOrExportSpecifier);
+            /**
+             * Holds all state needed for the finding references.
+             * Unlike `Search`, there is only one `State`.
+             */
+            var State = (function () {
+                function State(sourceFiles, 
+                    /** True if we're searching for constructor references. */
+                    isForConstructor, checker, cancellationToken, searchMeaning, options, result) {
+                    this.sourceFiles = sourceFiles;
+                    this.isForConstructor = isForConstructor;
+                    this.checker = checker;
+                    this.cancellationToken = cancellationToken;
+                    this.searchMeaning = searchMeaning;
+                    this.options = options;
+                    this.result = result;
+                    /** Cache for `explicitlyinheritsFrom`. */
+                    this.inheritsFromCache = ts.createMap();
+                    /**
+                     * Type nodes can contain multiple references to the same type. For example:
+                     *      let x: Foo & (Foo & Bar) = ...
+                     * Because we are returning the implementation locations and not the identifier locations,
+                     * duplicate entries would be returned here as each of the type references is part of
+                     * the same implementation. For that reason, check before we add a new entry.
+                     */
+                    this.markSeenContainingTypeReference = ts.nodeSeenTracker();
+                    /**
+                     * It's possible that we will encounter the right side of `export { foo as bar } from "x";` more than once.
+                     * For example:
+                     *     // b.ts
+                     *     export { foo as bar } from "./a";
+                     *     import { bar } from "./b";
+                     *
+                     * Normally at `foo as bar` we directly add `foo` and do not locally search for it (since it doesn't declare a local).
+                     * But another reference to it may appear in the same source file.
+                     * See `tests/cases/fourslash/transitiveExportImports3.ts`.
+                     */
+                    this.markSeenReExportRHS = ts.nodeSeenTracker();
+                    this.symbolIdToReferences = [];
+                    // Source file ID → symbol ID → Whether the symbol has been searched for in the source file.
+                    this.sourceFileToSeenSymbols = [];
+                }
+                /** Gets every place to look for references of an exported symbols. See `ImportsResult` in `importTracker.ts` for more documentation. */
+                State.prototype.getImportSearches = function (exportSymbol, exportInfo) {
+                    if (!this.importTracker)
+                        this.importTracker = FindAllReferences.createImportTracker(this.sourceFiles, this.checker, this.cancellationToken);
+                    return this.importTracker(exportSymbol, exportInfo, this.options.isForRename);
+                };
+                /** @param allSearchSymbols set of additinal symbols for use by `includes`. */
+                State.prototype.createSearch = function (location, symbol, comingFrom, searchOptions) {
+                    if (searchOptions === void 0) { searchOptions = {}; }
+                    // Note: if this is an external module symbol, the name doesn't include quotes.
+                    var _a = searchOptions.text, text = _a === void 0 ? ts.stripQuotes(ts.getDeclaredName(this.checker, symbol, location)) : _a, _b = searchOptions.allSearchSymbols, allSearchSymbols = _b === void 0 ? undefined : _b;
+                    var escapedText = ts.escapeIdentifier(text);
+                    var parents = this.options.implementations && getParentSymbolsOfPropertyAccess(location, symbol, this.checker);
+                    return {
+                        location: location, symbol: symbol, comingFrom: comingFrom, text: text, escapedText: escapedText, parents: parents,
+                        includes: function (referenceSymbol) { return allSearchSymbols ? ts.contains(allSearchSymbols, referenceSymbol) : referenceSymbol === symbol; },
+                    };
+                };
+                /**
+                 * Callback to add references for a particular searched symbol.
+                 * This initializes a reference group, so only call this if you will add at least one reference.
+                 */
+                State.prototype.referenceAdder = function (searchSymbol, searchLocation) {
+                    var symbolId = ts.getSymbolId(searchSymbol);
+                    var references = this.symbolIdToReferences[symbolId];
+                    if (!references) {
+                        references = this.symbolIdToReferences[symbolId] = [];
+                        this.result.push({ definition: { type: "symbol", symbol: searchSymbol, node: searchLocation }, references: references });
+                    }
+                    return function (node) { return references.push(FindAllReferences.nodeEntry(node)); };
+                };
+                /** Add a reference with no associated definition. */
+                State.prototype.addStringOrCommentReference = function (fileName, textSpan) {
+                    this.result.push({
+                        definition: undefined,
+                        references: [{ type: "span", fileName: fileName, textSpan: textSpan }]
+                    });
+                };
+                /** Returns `true` the first time we search for a symbol in a file and `false` afterwards. */
+                State.prototype.markSearchedSymbol = function (sourceFile, symbol) {
+                    var sourceId = ts.getNodeId(sourceFile);
+                    var symbolId = ts.getSymbolId(symbol);
+                    var seenSymbols = this.sourceFileToSeenSymbols[sourceId] || (this.sourceFileToSeenSymbols[sourceId] = []);
+                    return !seenSymbols[symbolId] && (seenSymbols[symbolId] = true);
+                };
+                return State;
+            }());
+            /** Search for all imports of a given exported symbol using `State.getImportSearches`. */
+            function searchForImportsOfExport(exportLocation, exportSymbol, exportInfo, state) {
+                var _a = state.getImportSearches(exportSymbol, exportInfo), importSearches = _a.importSearches, singleReferences = _a.singleReferences, indirectUsers = _a.indirectUsers;
+                // For `import { foo as bar }` just add the reference to `foo`, and don't otherwise search in the file.
+                if (singleReferences.length) {
+                    var addRef = state.referenceAdder(exportSymbol, exportLocation);
+                    for (var _i = 0, singleReferences_1 = singleReferences; _i < singleReferences_1.length; _i++) {
+                        var singleRef = singleReferences_1[_i];
+                        addRef(singleRef);
+                    }
+                }
+                // For each import, find all references to that import in its source file.
+                for (var _b = 0, importSearches_1 = importSearches; _b < importSearches_1.length; _b++) {
+                    var _c = importSearches_1[_b], importLocation = _c[0], importSymbol = _c[1];
+                    getReferencesInSourceFile(importLocation.getSourceFile(), state.createSearch(importLocation, importSymbol, 1 /* Export */), state);
+                }
+                if (indirectUsers.length) {
+                    var indirectSearch = void 0;
+                    switch (exportInfo.exportKind) {
+                        case 0 /* Named */:
+                            indirectSearch = state.createSearch(exportLocation, exportSymbol, 1 /* Export */);
+                            break;
+                        case 1 /* Default */:
+                            // Search for a property access to '.default'. This can't be renamed.
+                            indirectSearch = state.options.isForRename ? undefined : state.createSearch(exportLocation, exportSymbol, 1 /* Export */, { text: "default" });
+                            break;
+                        case 2 /* ExportEquals */:
+                            break;
+                    }
+                    if (indirectSearch) {
+                        for (var _d = 0, indirectUsers_1 = indirectUsers; _d < indirectUsers_1.length; _d++) {
+                            var indirectUser = indirectUsers_1[_d];
+                            searchForName(indirectUser, indirectSearch, state);
+                        }
                     }
                 }
-                return undefined;
             }
-            function followAliasIfNecessary(symbol, location) {
-                return getAliasSymbolForPropertyNameSymbol(symbol, location) || symbol;
+            // Go to the symbol we imported from and find references for it.
+            function searchForImportedSymbol(symbol, state) {
+                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                    var declaration = _a[_i];
+                    getReferencesInSourceFile(declaration.getSourceFile(), state.createSearch(declaration, symbol, 0 /* Import */), state);
+                }
+            }
+            /** Search for all occurences of an identifier in a source file (and filter out the ones that match). */
+            function searchForName(sourceFile, search, state) {
+                if (ts.getNameTable(sourceFile).get(search.escapedText) !== undefined) {
+                    getReferencesInSourceFile(sourceFile, search, state);
+                }
             }
-            function getPropertySymbolOfDestructuringAssignment(location) {
+            function getPropertySymbolOfDestructuringAssignment(location, checker) {
                 return ts.isArrayLiteralOrObjectLiteralDestructuringPattern(location.parent.parent) &&
-                    typeChecker.getPropertySymbolOfDestructuringAssignment(location);
+                    checker.getPropertySymbolOfDestructuringAssignment(location);
             }
             function isObjectBindingPatternElementWithoutPropertyName(symbol) {
-                var bindingElement = ts.getDeclarationOfKind(symbol, 169 /* BindingElement */);
+                var bindingElement = ts.getDeclarationOfKind(symbol, 176 /* BindingElement */);
                 return bindingElement &&
-                    bindingElement.parent.kind === 167 /* ObjectBindingPattern */ &&
+                    bindingElement.parent.kind === 174 /* ObjectBindingPattern */ &&
                     !bindingElement.propertyName;
             }
-            function getPropertySymbolOfObjectBindingPatternWithoutPropertyName(symbol) {
+            function getPropertySymbolOfObjectBindingPatternWithoutPropertyName(symbol, checker) {
                 if (isObjectBindingPatternElementWithoutPropertyName(symbol)) {
-                    var bindingElement = ts.getDeclarationOfKind(symbol, 169 /* BindingElement */);
-                    var typeOfPattern = typeChecker.getTypeAtLocation(bindingElement.parent);
-                    return typeOfPattern && typeChecker.getPropertyOfType(typeOfPattern, bindingElement.name.text);
+                    var bindingElement = ts.getDeclarationOfKind(symbol, 176 /* BindingElement */);
+                    var typeOfPattern = checker.getTypeAtLocation(bindingElement.parent);
+                    return typeOfPattern && checker.getPropertyOfType(typeOfPattern, bindingElement.name.text);
                 }
                 return undefined;
             }
-            function getInternedName(symbol, location, declarations) {
-                // If this is an export or import specifier it could have been renamed using the 'as' syntax.
-                // If so we want to search for whatever under the cursor.
-                if (ts.isImportOrExportSpecifierName(location)) {
-                    return location.getText();
-                }
-                // Try to get the local symbol if we're dealing with an 'export default'
-                // since that symbol has the "true" name.
-                var localExportDefaultSymbol = ts.getLocalSymbolForExportDefault(symbol);
-                symbol = localExportDefaultSymbol || symbol;
-                return ts.stripQuotes(symbol.name);
-            }
             /**
              * Determines the smallest scope in which a symbol may have named references.
              * Note that not every construct has been accounted for. This function can
@@ -65739,20 +79397,20 @@ var ts;
             function getSymbolScope(symbol) {
                 // If this is the symbol of a named function expression or named class expression,
                 // then named references are limited to its own scope.
-                var valueDeclaration = symbol.valueDeclaration;
-                if (valueDeclaration && (valueDeclaration.kind === 179 /* FunctionExpression */ || valueDeclaration.kind === 192 /* ClassExpression */)) {
+                var declarations = symbol.declarations, flags = symbol.flags, parent = symbol.parent, valueDeclaration = symbol.valueDeclaration;
+                if (valueDeclaration && (valueDeclaration.kind === 186 /* FunctionExpression */ || valueDeclaration.kind === 199 /* ClassExpression */)) {
                     return valueDeclaration;
                 }
+                if (!declarations) {
+                    return undefined;
+                }
                 // If this is private property or method, the scope is the containing class
-                if (symbol.flags & (4 /* Property */ | 8192 /* Method */)) {
-                    var privateDeclaration = ts.forEach(symbol.getDeclarations(), function (d) { return (ts.getModifierFlags(d) & 8 /* Private */) ? d : undefined; });
+                if (flags & (4 /* Property */ | 8192 /* Method */)) {
+                    var privateDeclaration = ts.find(declarations, function (d) { return ts.hasModifier(d, 8 /* Private */); });
                     if (privateDeclaration) {
-                        return ts.getAncestor(privateDeclaration, 221 /* ClassDeclaration */);
+                        return ts.getAncestor(privateDeclaration, 229 /* ClassDeclaration */);
                     }
-                }
-                // If the symbol is an import we would like to find it if we are looking for what it imports.
-                // So consider it visible outside its declaration scope.
-                if (symbol.flags & 8388608 /* Alias */) {
+                    // Else this is a public property and could be accessed from anywhere.
                     return undefined;
                 }
                 // If symbol is of object binding pattern element without property name we would want to
@@ -65760,36 +79418,37 @@ var ts;
                 if (isObjectBindingPatternElementWithoutPropertyName(symbol)) {
                     return undefined;
                 }
-                // if this symbol is visible from its parent container, e.g. exported, then bail out
-                // if symbol correspond to the union property - bail out
-                if (symbol.parent || (symbol.flags & 268435456 /* SyntheticProperty */)) {
+                // If the symbol has a parent, it's globally visible.
+                // Unless that parent is an external module, then we should only search in the module (and recurse on the export later).
+                // But if the parent is a module that has `export as namespace`, then the symbol *is* globally visible.
+                if (parent && !((parent.flags & 1536 /* Module */) && ts.isExternalModuleSymbol(parent) && !parent.globalExports)) {
                     return undefined;
                 }
                 var scope;
-                var declarations = symbol.getDeclarations();
-                if (declarations) {
-                    for (var _i = 0, declarations_7 = declarations; _i < declarations_7.length; _i++) {
-                        var declaration = declarations_7[_i];
-                        var container = ts.getContainerNode(declaration);
-                        if (!container) {
-                            return undefined;
-                        }
-                        if (scope && scope !== container) {
-                            // Different declarations have different containers, bail out
-                            return undefined;
-                        }
-                        if (container.kind === 256 /* SourceFile */ && !ts.isExternalModule(container)) {
-                            // This is a global variable and not an external module, any declaration defined
-                            // within this scope is visible outside the file
-                            return undefined;
-                        }
-                        // The search scope is the container node
-                        scope = container;
+                for (var _i = 0, declarations_10 = declarations; _i < declarations_10.length; _i++) {
+                    var declaration = declarations_10[_i];
+                    var container = ts.getContainerNode(declaration);
+                    if (scope && scope !== container) {
+                        // Different declarations have different containers, bail out
+                        return undefined;
+                    }
+                    if (!container || container.kind === 265 /* SourceFile */ && !ts.isExternalOrCommonJsModule(container)) {
+                        // This is a global variable and not an external module, any declaration defined
+                        // within this scope is visible outside the file
+                        return undefined;
                     }
+                    // The search scope is the container node
+                    scope = container;
                 }
-                return scope;
+                // If symbol.parent, this means we are in an export of an external module. (Otherwise we would have returned `undefined` above.)
+                // For an export of a module, we may be in a declaration file, and it may be accessed elsewhere. E.g.:
+                //     declare module "a" { export type T = number; }
+                //     declare module "b" { import { T } from "a"; export const x: T; }
+                // So we must search the whole source file. (Because we will mark the source file as seen, we we won't return to it when searching for imports.)
+                return parent ? scope.getSourceFile() : scope;
             }
-            function getPossibleSymbolReferencePositions(sourceFile, symbolName, start, end) {
+            function getPossibleSymbolReferencePositions(sourceFile, symbolName, container) {
+                if (container === void 0) { container = sourceFile; }
                 var positions = [];
                 /// TODO: Cache symbol existence for files to save text search
                 // Also, need to make this work for unicode escapes.
@@ -65800,17 +79459,16 @@ var ts;
                 var text = sourceFile.text;
                 var sourceLength = text.length;
                 var symbolNameLength = symbolName.length;
-                var position = text.indexOf(symbolName, start);
+                var position = text.indexOf(symbolName, container.pos);
                 while (position >= 0) {
-                    cancellationToken.throwIfCancellationRequested();
                     // If we are past the end, stop looking
-                    if (position > end)
+                    if (position > container.end)
                         break;
                     // We found a match.  Make sure it's not part of a larger word (i.e. the char
                     // before and after it have to be a non-identifier char).
                     var endPosition = position + symbolNameLength;
-                    if ((position === 0 || !ts.isIdentifierPart(text.charCodeAt(position - 1), 2 /* Latest */)) &&
-                        (endPosition === sourceLength || !ts.isIdentifierPart(text.charCodeAt(endPosition), 2 /* Latest */))) {
+                    if ((position === 0 || !ts.isIdentifierPart(text.charCodeAt(position - 1), 5 /* Latest */)) &&
+                        (endPosition === sourceLength || !ts.isIdentifierPart(text.charCodeAt(endPosition), 5 /* Latest */))) {
                         // Found a real match.  Keep searching.
                         positions.push(position);
                     }
@@ -65822,280 +79480,314 @@ var ts;
                 var references = [];
                 var sourceFile = container.getSourceFile();
                 var labelName = targetLabel.text;
-                var possiblePositions = getPossibleSymbolReferencePositions(sourceFile, labelName, container.getStart(), container.getEnd());
-                ts.forEach(possiblePositions, function (position) {
-                    cancellationToken.throwIfCancellationRequested();
-                    var node = ts.getTouchingWord(sourceFile, position);
-                    if (!node || node.getWidth() !== labelName.length) {
-                        return;
-                    }
+                var possiblePositions = getPossibleSymbolReferencePositions(sourceFile, labelName, container);
+                for (var _i = 0, possiblePositions_1 = possiblePositions; _i < possiblePositions_1.length; _i++) {
+                    var position = possiblePositions_1[_i];
+                    var node = ts.getTouchingWord(sourceFile, position, /*includeJsDocComment*/ false);
                     // Only pick labels that are either the target label, or have a target that is the target label
-                    if (node === targetLabel ||
-                        (ts.isJumpStatementTarget(node) && ts.getTargetLabel(node, labelName) === targetLabel)) {
-                        references.push(getReferenceEntryFromNode(node));
+                    if (node && (node === targetLabel || (ts.isJumpStatementTarget(node) && ts.getTargetLabel(node, labelName) === targetLabel))) {
+                        references.push(FindAllReferences.nodeEntry(node));
                     }
-                });
-                var definition = {
-                    containerKind: "",
-                    containerName: "",
-                    fileName: targetLabel.getSourceFile().fileName,
-                    kind: ts.ScriptElementKind.label,
-                    name: labelName,
-                    textSpan: ts.createTextSpanFromBounds(targetLabel.getStart(), targetLabel.getEnd()),
-                    displayParts: [ts.displayPart(labelName, ts.SymbolDisplayPartKind.text)]
-                };
-                return [{ definition: definition, references: references }];
+                }
+                return [{ definition: { type: "label", node: targetLabel }, references: references }];
             }
             function isValidReferencePosition(node, searchSymbolName) {
-                if (node) {
-                    // Compare the length so we filter out strict superstrings of the symbol we are looking for
-                    switch (node.kind) {
-                        case 69 /* Identifier */:
-                            return node.getWidth() === searchSymbolName.length;
-                        case 9 /* StringLiteral */:
-                            if (ts.isLiteralNameOfPropertyDeclarationOrIndexAccess(node) ||
-                                isNameOfExternalModuleImportOrDeclaration(node)) {
-                                // For string literals we have two additional chars for the quotes
-                                return node.getWidth() === searchSymbolName.length + 2;
-                            }
-                            break;
-                        case 8 /* NumericLiteral */:
-                            if (ts.isLiteralNameOfPropertyDeclarationOrIndexAccess(node)) {
-                                return node.getWidth() === searchSymbolName.length;
-                            }
-                            break;
+                // Compare the length so we filter out strict superstrings of the symbol we are looking for
+                switch (node && node.kind) {
+                    case 71 /* Identifier */:
+                        return ts.unescapeIdentifier(node.text).length === searchSymbolName.length;
+                    case 9 /* StringLiteral */:
+                        return (ts.isLiteralNameOfPropertyDeclarationOrIndexAccess(node) || isNameOfExternalModuleImportOrDeclaration(node)) &&
+                            node.text.length === searchSymbolName.length;
+                    case 8 /* NumericLiteral */:
+                        return ts.isLiteralNameOfPropertyDeclarationOrIndexAccess(node) && node.text.length === searchSymbolName.length;
+                    default:
+                        return false;
+                }
+            }
+            function getAllReferencesForKeyword(sourceFiles, keywordKind, cancellationToken) {
+                var references = [];
+                for (var _i = 0, sourceFiles_6 = sourceFiles; _i < sourceFiles_6.length; _i++) {
+                    var sourceFile = sourceFiles_6[_i];
+                    cancellationToken.throwIfCancellationRequested();
+                    addReferencesForKeywordInFile(sourceFile, keywordKind, ts.tokenToString(keywordKind), references);
+                }
+                return references.length ? [{ definition: { type: "keyword", node: references[0].node }, references: references }] : undefined;
+            }
+            function addReferencesForKeywordInFile(sourceFile, kind, searchText, references) {
+                var possiblePositions = getPossibleSymbolReferencePositions(sourceFile, searchText, sourceFile);
+                for (var _i = 0, possiblePositions_2 = possiblePositions; _i < possiblePositions_2.length; _i++) {
+                    var position = possiblePositions_2[_i];
+                    var referenceLocation = ts.getTouchingPropertyName(sourceFile, position, /*includeJsDocComment*/ true);
+                    if (referenceLocation.kind === kind) {
+                        references.push(FindAllReferences.nodeEntry(referenceLocation));
                     }
                 }
-                return false;
             }
-            /** Search within node "container" for references for a search value, where the search value is defined as a
-              * tuple of(searchSymbol, searchText, searchLocation, and searchMeaning).
-              * searchLocation: a node where the search value
-              */
-            function getReferencesInNode(container, searchSymbol, searchText, searchLocation, searchMeaning, findInStrings, findInComments, result, symbolToIndex) {
-                var sourceFile = container.getSourceFile();
-                var start = findInComments ? container.getFullStart() : container.getStart();
-                var possiblePositions = getPossibleSymbolReferencePositions(sourceFile, searchText, start, container.getEnd());
-                var parents = getParentSymbolsOfPropertyAccess();
-                var inheritsFromCache = ts.createMap();
-                if (possiblePositions.length) {
-                    // Build the set of symbols to search for, initially it has only the current symbol
-                    var searchSymbols_1 = populateSearchSymbolSet(searchSymbol, searchLocation);
-                    ts.forEach(possiblePositions, function (position) {
-                        cancellationToken.throwIfCancellationRequested();
-                        var referenceLocation = ts.getTouchingPropertyName(sourceFile, position);
-                        if (!isValidReferencePosition(referenceLocation, searchText)) {
-                            // This wasn't the start of a token.  Check to see if it might be a
-                            // match in a comment or string if that's what the caller is asking
-                            // for.
-                            if (!implementations && ((findInStrings && ts.isInString(sourceFile, position)) ||
-                                (findInComments && ts.isInNonReferenceComment(sourceFile, position)))) {
-                                // In the case where we're looking inside comments/strings, we don't have
-                                // an actual definition.  So just use 'undefined' here.  Features like
-                                // 'Rename' won't care (as they ignore the definitions), and features like
-                                // 'FindReferences' will just filter out these results.
-                                result.push({
-                                    definition: undefined,
-                                    references: [{
-                                            fileName: sourceFile.fileName,
-                                            textSpan: ts.createTextSpan(position, searchText.length),
-                                            isWriteAccess: false,
-                                            isDefinition: false
-                                        }]
-                                });
-                            }
-                            return;
-                        }
-                        if (!(ts.getMeaningFromLocation(referenceLocation) & searchMeaning)) {
-                            return;
-                        }
-                        var referenceSymbol = typeChecker.getSymbolAtLocation(referenceLocation);
-                        if (referenceSymbol) {
-                            var referenceSymbolDeclaration = referenceSymbol.valueDeclaration;
-                            var shorthandValueSymbol = typeChecker.getShorthandAssignmentValueSymbol(referenceSymbolDeclaration);
-                            var relatedSymbol = getRelatedSymbol(searchSymbols_1, referenceSymbol, referenceLocation, 
-                            /*searchLocationIsConstructor*/ searchLocation.kind === 121 /* ConstructorKeyword */, parents, inheritsFromCache);
-                            if (relatedSymbol) {
-                                addReferenceToRelatedSymbol(referenceLocation, relatedSymbol);
-                            }
-                            else if (!(referenceSymbol.flags & 67108864 /* Transient */) && searchSymbols_1.indexOf(shorthandValueSymbol) >= 0) {
-                                addReferenceToRelatedSymbol(referenceSymbolDeclaration.name, shorthandValueSymbol);
-                            }
-                            else if (searchLocation.kind === 121 /* ConstructorKeyword */) {
-                                findAdditionalConstructorReferences(referenceSymbol, referenceLocation);
-                            }
-                        }
-                    });
+            function getReferencesInSourceFile(sourceFile, search, state) {
+                state.cancellationToken.throwIfCancellationRequested();
+                return getReferencesInContainer(sourceFile, sourceFile, search, state);
+            }
+            /**
+             * Search within node "container" for references for a search value, where the search value is defined as a
+             * tuple of(searchSymbol, searchText, searchLocation, and searchMeaning).
+             * searchLocation: a node where the search value
+             */
+            function getReferencesInContainer(container, sourceFile, search, state) {
+                if (!state.markSearchedSymbol(sourceFile, search.symbol)) {
+                    return;
                 }
-                return;
-                /* If we are just looking for implementations and this is a property access expression, we need to get the
-                 * symbol of the local type of the symbol the property is being accessed on. This is because our search
-                 * symbol may have a different parent symbol if the local type's symbol does not declare the property
-                 * being accessed (i.e. it is declared in some parent class or interface)
-                 */
-                function getParentSymbolsOfPropertyAccess() {
-                    if (implementations) {
-                        var propertyAccessExpression = getPropertyAccessExpressionFromRightHandSide(searchLocation);
-                        if (propertyAccessExpression) {
-                            var localParentType = typeChecker.getTypeAtLocation(propertyAccessExpression.expression);
-                            if (localParentType) {
-                                if (localParentType.symbol && localParentType.symbol.flags & (32 /* Class */ | 64 /* Interface */) && localParentType.symbol !== searchSymbol.parent) {
-                                    return [localParentType.symbol];
-                                }
-                                else if (localParentType.flags & 1572864 /* UnionOrIntersection */) {
-                                    return getSymbolsForClassAndInterfaceComponents(localParentType);
-                                }
-                            }
-                        }
+                for (var _i = 0, _a = getPossibleSymbolReferencePositions(sourceFile, search.text, container); _i < _a.length; _i++) {
+                    var position = _a[_i];
+                    getReferencesAtLocation(sourceFile, position, search, state);
+                }
+            }
+            function getReferencesAtLocation(sourceFile, position, search, state) {
+                var referenceLocation = ts.getTouchingPropertyName(sourceFile, position, /*includeJsDocComment*/ true);
+                if (!isValidReferencePosition(referenceLocation, search.text)) {
+                    // This wasn't the start of a token.  Check to see if it might be a
+                    // match in a comment or string if that's what the caller is asking
+                    // for.
+                    if (!state.options.implementations && (state.options.findInStrings && ts.isInString(sourceFile, position) || state.options.findInComments && ts.isInNonReferenceComment(sourceFile, position))) {
+                        // In the case where we're looking inside comments/strings, we don't have
+                        // an actual definition.  So just use 'undefined' here.  Features like
+                        // 'Rename' won't care (as they ignore the definitions), and features like
+                        // 'FindReferences' will just filter out these results.
+                        state.addStringOrCommentReference(sourceFile.fileName, ts.createTextSpan(position, search.text.length));
                     }
+                    return;
+                }
+                if (!(ts.getMeaningFromLocation(referenceLocation) & state.searchMeaning)) {
+                    return;
+                }
+                var referenceSymbol = state.checker.getSymbolAtLocation(referenceLocation);
+                if (!referenceSymbol) {
+                    return;
+                }
+                var parent = referenceLocation.parent;
+                if (ts.isImportSpecifier(parent) && parent.propertyName === referenceLocation) {
+                    // This is added through `singleReferences` in ImportsResult. If we happen to see it again, don't add it again.
+                    return;
+                }
+                if (ts.isExportSpecifier(parent)) {
+                    ts.Debug.assert(referenceLocation.kind === 71 /* Identifier */);
+                    getReferencesAtExportSpecifier(referenceLocation, referenceSymbol, parent, search, state);
+                    return;
+                }
+                var relatedSymbol = getRelatedSymbol(search, referenceSymbol, referenceLocation, state);
+                if (!relatedSymbol) {
+                    getReferenceForShorthandProperty(referenceSymbol, search, state);
+                    return;
+                }
+                if (state.isForConstructor) {
+                    findConstructorReferences(referenceLocation, sourceFile, search, state);
                 }
-                function getPropertyAccessExpressionFromRightHandSide(node) {
-                    return ts.isRightSideOfPropertyAccess(node) && node.parent;
+                else {
+                    addReference(referenceLocation, relatedSymbol, search.location, state);
+                }
+                getImportOrExportReferences(referenceLocation, referenceSymbol, search, state);
+            }
+            function getReferencesAtExportSpecifier(referenceLocation, referenceSymbol, exportSpecifier, search, state) {
+                var parent = exportSpecifier.parent, propertyName = exportSpecifier.propertyName, name = exportSpecifier.name;
+                var exportDeclaration = parent.parent;
+                var localSymbol = getLocalSymbolForExportSpecifier(referenceLocation, referenceSymbol, exportSpecifier, state.checker);
+                if (!search.includes(localSymbol)) {
+                    return;
                 }
-                /** Adds references when a constructor is used with `new this()` in its own class and `super()` calls in subclasses.  */
-                function findAdditionalConstructorReferences(referenceSymbol, referenceLocation) {
-                    ts.Debug.assert(ts.isClassLike(searchSymbol.valueDeclaration));
-                    var referenceClass = referenceLocation.parent;
-                    if (referenceSymbol === searchSymbol && ts.isClassLike(referenceClass)) {
-                        ts.Debug.assert(referenceClass.name === referenceLocation);
-                        // This is the class declaration containing the constructor.
-                        addReferences(findOwnConstructorCalls(searchSymbol));
+                if (!propertyName) {
+                    addRef();
+                }
+                else if (referenceLocation === propertyName) {
+                    // For `export { foo as bar } from "baz"`, "`foo`" will be added from the singleReferences for import searches of the original export.
+                    // For `export { foo as bar };`, where `foo` is a local, so add it now.
+                    if (!exportDeclaration.moduleSpecifier) {
+                        addRef();
                     }
-                    else {
-                        // If this class appears in `extends C`, then the extending class' "super" calls are references.
-                        var classExtending = tryGetClassByExtendingIdentifier(referenceLocation);
-                        if (classExtending && ts.isClassLike(classExtending) && followAliasIfNecessary(referenceSymbol, referenceLocation) === searchSymbol) {
-                            addReferences(superConstructorAccesses(classExtending));
-                        }
+                    if (!state.options.isForRename && state.markSeenReExportRHS(name)) {
+                        addReference(name, referenceSymbol, name, state);
+                    }
+                }
+                else {
+                    if (state.markSeenReExportRHS(referenceLocation)) {
+                        addRef();
                     }
                 }
-                function addReferences(references) {
-                    if (references.length) {
-                        var referencedSymbol = getReferencedSymbol(searchSymbol);
-                        ts.addRange(referencedSymbol.references, ts.map(references, getReferenceEntryFromNode));
+                // For `export { foo as bar }`, rename `foo`, but not `bar`.
+                if (!(referenceLocation === propertyName && state.options.isForRename)) {
+                    var exportKind = referenceLocation.originalKeywordKind === 79 /* DefaultKeyword */ ? 1 /* Default */ : 0 /* Named */;
+                    var exportInfo = FindAllReferences.getExportInfo(referenceSymbol, exportKind, state.checker);
+                    ts.Debug.assert(!!exportInfo);
+                    searchForImportsOfExport(referenceLocation, referenceSymbol, exportInfo, state);
+                }
+                // At `export { x } from "foo"`, also search for the imported symbol `"foo".x`.
+                if (search.comingFrom !== 1 /* Export */ && exportDeclaration.moduleSpecifier && !propertyName) {
+                    searchForImportedSymbol(state.checker.getExportSpecifierLocalTargetSymbol(exportSpecifier), state);
+                }
+                function addRef() {
+                    addReference(referenceLocation, localSymbol, search.location, state);
+                }
+            }
+            function getLocalSymbolForExportSpecifier(referenceLocation, referenceSymbol, exportSpecifier, checker) {
+                return isExportSpecifierAlias(referenceLocation, exportSpecifier) ? checker.getExportSpecifierLocalTargetSymbol(exportSpecifier) : referenceSymbol;
+            }
+            function isExportSpecifierAlias(referenceLocation, exportSpecifier) {
+                var parent = exportSpecifier.parent, propertyName = exportSpecifier.propertyName, name = exportSpecifier.name;
+                ts.Debug.assert(propertyName === referenceLocation || name === referenceLocation);
+                if (propertyName) {
+                    // Given `export { foo as bar } [from "someModule"]`: It's an alias at `foo`, but at `bar` it's a new symbol.
+                    return propertyName === referenceLocation;
+                }
+                else {
+                    // `export { foo } from "foo"` is a re-export.
+                    // `export { foo };` is not a re-export, it creates an alias for the local variable `foo`.
+                    return !parent.parent.moduleSpecifier;
+                }
+            }
+            function getImportOrExportReferences(referenceLocation, referenceSymbol, search, state) {
+                var importOrExport = FindAllReferences.getImportOrExportSymbol(referenceLocation, referenceSymbol, state.checker, search.comingFrom === 1 /* Export */);
+                if (!importOrExport)
+                    return;
+                var symbol = importOrExport.symbol;
+                if (importOrExport.kind === 0 /* Import */) {
+                    if (!state.options.isForRename || importOrExport.isNamedImport) {
+                        searchForImportedSymbol(symbol, state);
                     }
                 }
-                /** `classSymbol` is the class where the constructor was defined.
-                 * Reference the constructor and all calls to `new this()`.
+                else {
+                    // We don't check for `state.isForRename`, even for default exports, because importers that previously matched the export name should be updated to continue matching.
+                    searchForImportsOfExport(referenceLocation, symbol, importOrExport.exportInfo, state);
+                }
+            }
+            function getReferenceForShorthandProperty(_a, search, state) {
+                var flags = _a.flags, valueDeclaration = _a.valueDeclaration;
+                var shorthandValueSymbol = state.checker.getShorthandAssignmentValueSymbol(valueDeclaration);
+                /*
+                 * Because in short-hand property assignment, an identifier which stored as name of the short-hand property assignment
+                 * has two meanings: property name and property value. Therefore when we do findAllReference at the position where
+                 * an identifier is declared, the language service should return the position of the variable declaration as well as
+                 * the position in short-hand property assignment excluding property accessing. However, if we do findAllReference at the
+                 * position of property accessing, the referenceEntry of such position will be handled in the first case.
                  */
-                function findOwnConstructorCalls(classSymbol) {
-                    var result = [];
-                    for (var _i = 0, _a = classSymbol.members["__constructor"].declarations; _i < _a.length; _i++) {
-                        var decl = _a[_i];
-                        ts.Debug.assert(decl.kind === 148 /* Constructor */);
-                        var ctrKeyword = decl.getChildAt(0);
-                        ts.Debug.assert(ctrKeyword.kind === 121 /* ConstructorKeyword */);
-                        result.push(ctrKeyword);
-                    }
-                    ts.forEachProperty(classSymbol.exports, function (member) {
-                        var decl = member.valueDeclaration;
-                        if (decl && decl.kind === 147 /* MethodDeclaration */) {
-                            var body = decl.body;
-                            if (body) {
-                                forEachDescendantOfKind(body, 97 /* ThisKeyword */, function (thisKeyword) {
-                                    if (ts.isNewExpressionTarget(thisKeyword)) {
-                                        result.push(thisKeyword);
-                                    }
-                                });
-                            }
-                        }
-                    });
-                    return result;
+                if (!(flags & 134217728 /* Transient */) && search.includes(shorthandValueSymbol)) {
+                    addReference(ts.getNameOfDeclaration(valueDeclaration), shorthandValueSymbol, search.location, state);
+                }
+            }
+            function addReference(referenceLocation, relatedSymbol, searchLocation, state) {
+                var addRef = state.referenceAdder(relatedSymbol, searchLocation);
+                if (state.options.implementations) {
+                    addImplementationReferences(referenceLocation, addRef, state);
+                }
+                else {
+                    addRef(referenceLocation);
+                }
+            }
+            /** Adds references when a constructor is used with `new this()` in its own class and `super()` calls in subclasses.  */
+            function findConstructorReferences(referenceLocation, sourceFile, search, state) {
+                if (ts.isNewExpressionTarget(referenceLocation)) {
+                    addReference(referenceLocation, search.symbol, search.location, state);
+                }
+                var pusher = state.referenceAdder(search.symbol, search.location);
+                if (ts.isClassLike(referenceLocation.parent)) {
+                    ts.Debug.assert(referenceLocation.parent.name === referenceLocation);
+                    // This is the class declaration containing the constructor.
+                    findOwnConstructorReferences(search.symbol, sourceFile, pusher);
                 }
-                /** Find references to `super` in the constructor of an extending class.  */
-                function superConstructorAccesses(cls) {
-                    var symbol = cls.symbol;
-                    var ctr = symbol.members["__constructor"];
-                    if (!ctr) {
-                        return [];
+                else {
+                    // If this class appears in `extends C`, then the extending class' "super" calls are references.
+                    var classExtending = tryGetClassByExtendingIdentifier(referenceLocation);
+                    if (classExtending && ts.isClassLike(classExtending)) {
+                        findSuperConstructorAccesses(classExtending, pusher);
                     }
-                    var result = [];
-                    for (var _i = 0, _a = ctr.declarations; _i < _a.length; _i++) {
-                        var decl = _a[_i];
-                        ts.Debug.assert(decl.kind === 148 /* Constructor */);
+                }
+            }
+            function getPropertyAccessExpressionFromRightHandSide(node) {
+                return ts.isRightSideOfPropertyAccess(node) && node.parent;
+            }
+            /**
+             * `classSymbol` is the class where the constructor was defined.
+             * Reference the constructor and all calls to `new this()`.
+             */
+            function findOwnConstructorReferences(classSymbol, sourceFile, addNode) {
+                for (var _i = 0, _a = classSymbol.members.get("__constructor").declarations; _i < _a.length; _i++) {
+                    var decl = _a[_i];
+                    var ctrKeyword = ts.findChildOfKind(decl, 123 /* ConstructorKeyword */, sourceFile);
+                    ts.Debug.assert(decl.kind === 152 /* Constructor */ && !!ctrKeyword);
+                    addNode(ctrKeyword);
+                }
+                classSymbol.exports.forEach(function (member) {
+                    var decl = member.valueDeclaration;
+                    if (decl && decl.kind === 151 /* MethodDeclaration */) {
                         var body = decl.body;
                         if (body) {
-                            forEachDescendantOfKind(body, 95 /* SuperKeyword */, function (node) {
-                                if (ts.isCallExpressionTarget(node)) {
-                                    result.push(node);
+                            forEachDescendantOfKind(body, 99 /* ThisKeyword */, function (thisKeyword) {
+                                if (ts.isNewExpressionTarget(thisKeyword)) {
+                                    addNode(thisKeyword);
                                 }
                             });
                         }
                     }
-                    ;
-                    return result;
+                });
+            }
+            /** Find references to `super` in the constructor of an extending class.  */
+            function findSuperConstructorAccesses(cls, addNode) {
+                var symbol = cls.symbol;
+                var ctr = symbol.members.get("__constructor");
+                if (!ctr) {
+                    return;
                 }
-                function getReferencedSymbol(symbol) {
-                    var symbolId = ts.getSymbolId(symbol);
-                    var index = symbolToIndex[symbolId];
-                    if (index === undefined) {
-                        index = result.length;
-                        symbolToIndex[symbolId] = index;
-                        result.push({
-                            definition: getDefinition(symbol),
-                            references: []
+                for (var _i = 0, _a = ctr.declarations; _i < _a.length; _i++) {
+                    var decl = _a[_i];
+                    ts.Debug.assert(decl.kind === 152 /* Constructor */);
+                    var body = decl.body;
+                    if (body) {
+                        forEachDescendantOfKind(body, 97 /* SuperKeyword */, function (node) {
+                            if (ts.isCallExpressionTarget(node)) {
+                                addNode(node);
+                            }
                         });
                     }
-                    return result[index];
-                }
-                function addReferenceToRelatedSymbol(node, relatedSymbol) {
-                    var references = getReferencedSymbol(relatedSymbol).references;
-                    if (implementations) {
-                        getImplementationReferenceEntryForNode(node, references);
-                    }
-                    else {
-                        references.push(getReferenceEntryFromNode(node));
-                    }
                 }
             }
-            function getImplementationReferenceEntryForNode(refNode, result) {
+            function addImplementationReferences(refNode, addReference, state) {
                 // Check if we found a function/propertyAssignment/method with an implementation or initializer
                 if (ts.isDeclarationName(refNode) && isImplementation(refNode.parent)) {
-                    result.push(getReferenceEntryFromNode(refNode.parent));
+                    addReference(refNode.parent);
+                    return;
                 }
-                else if (refNode.kind === 69 /* Identifier */) {
-                    if (refNode.parent.kind === 254 /* ShorthandPropertyAssignment */) {
-                        // Go ahead and dereference the shorthand assignment by going to its definition
-                        getReferenceEntriesForShorthandPropertyAssignment(refNode, typeChecker, result);
-                    }
-                    // Check if the node is within an extends or implements clause
-                    var containingClass = getContainingClassIfInHeritageClause(refNode);
-                    if (containingClass) {
-                        result.push(getReferenceEntryFromNode(containingClass));
-                        return;
-                    }
-                    // If we got a type reference, try and see if the reference applies to any expressions that can implement an interface
-                    var containingTypeReference = getContainingTypeReference(refNode);
-                    if (containingTypeReference) {
-                        var parent_21 = containingTypeReference.parent;
-                        if (ts.isVariableLike(parent_21) && parent_21.type === containingTypeReference && parent_21.initializer && isImplementationExpression(parent_21.initializer)) {
-                            maybeAdd(getReferenceEntryFromNode(parent_21.initializer));
-                        }
-                        else if (ts.isFunctionLike(parent_21) && parent_21.type === containingTypeReference && parent_21.body) {
-                            if (parent_21.body.kind === 199 /* Block */) {
-                                ts.forEachReturnStatement(parent_21.body, function (returnStatement) {
-                                    if (returnStatement.expression && isImplementationExpression(returnStatement.expression)) {
-                                        maybeAdd(getReferenceEntryFromNode(returnStatement.expression));
-                                    }
-                                });
-                            }
-                            else if (isImplementationExpression(parent_21.body)) {
-                                maybeAdd(getReferenceEntryFromNode(parent_21.body));
-                            }
+                if (refNode.kind !== 71 /* Identifier */) {
+                    return;
+                }
+                if (refNode.parent.kind === 262 /* ShorthandPropertyAssignment */) {
+                    // Go ahead and dereference the shorthand assignment by going to its definition
+                    getReferenceEntriesForShorthandPropertyAssignment(refNode, state.checker, addReference);
+                }
+                // Check if the node is within an extends or implements clause
+                var containingClass = getContainingClassIfInHeritageClause(refNode);
+                if (containingClass) {
+                    addReference(containingClass);
+                    return;
+                }
+                // If we got a type reference, try and see if the reference applies to any expressions that can implement an interface
+                var containingTypeReference = getContainingTypeReference(refNode);
+                if (containingTypeReference && state.markSeenContainingTypeReference(containingTypeReference)) {
+                    var parent_23 = containingTypeReference.parent;
+                    if (ts.isVariableLike(parent_23) && parent_23.type === containingTypeReference && parent_23.initializer && isImplementationExpression(parent_23.initializer)) {
+                        addReference(parent_23.initializer);
+                    }
+                    else if (ts.isFunctionLike(parent_23) && parent_23.type === containingTypeReference && parent_23.body) {
+                        if (parent_23.body.kind === 207 /* Block */) {
+                            ts.forEachReturnStatement(parent_23.body, function (returnStatement) {
+                                if (returnStatement.expression && isImplementationExpression(returnStatement.expression)) {
+                                    addReference(returnStatement.expression);
+                                }
+                            });
                         }
-                        else if (ts.isAssertionExpression(parent_21) && isImplementationExpression(parent_21.expression)) {
-                            maybeAdd(getReferenceEntryFromNode(parent_21.expression));
+                        else if (isImplementationExpression(parent_23.body)) {
+                            addReference(parent_23.body);
                         }
                     }
-                }
-                // Type nodes can contain multiple references to the same type. For example:
-                //      let x: Foo & (Foo & Bar) = ...
-                // Because we are returning the implementation locations and not the identifier locations,
-                // duplicate entries would be returned here as each of the type references is part of
-                // the same implementation. For that reason, check before we add a new entry
-                function maybeAdd(a) {
-                    if (!ts.forEach(result, function (b) { return a.fileName === b.fileName && a.textSpan.start === b.textSpan.start && a.textSpan.length === b.textSpan.length; })) {
-                        result.push(a);
+                    else if (ts.isAssertionExpression(parent_23) && isImplementationExpression(parent_23.expression)) {
+                        addReference(parent_23.expression);
                     }
                 }
             }
@@ -66106,7 +79798,7 @@ var ts;
                     if (componentType.symbol && componentType.symbol.getFlags() & (32 /* Class */ | 64 /* Interface */)) {
                         result.push(componentType.symbol);
                     }
-                    if (componentType.getFlags() & 1572864 /* UnionOrIntersection */) {
+                    if (componentType.getFlags() & 196608 /* UnionOrIntersection */) {
                         getSymbolsForClassAndInterfaceComponents(componentType, result);
                     }
                 }
@@ -66124,12 +79816,12 @@ var ts;
             }
             function getContainingClassIfInHeritageClause(node) {
                 if (node && node.parent) {
-                    if (node.kind === 194 /* ExpressionWithTypeArguments */
-                        && node.parent.kind === 251 /* HeritageClause */
+                    if (node.kind === 201 /* ExpressionWithTypeArguments */
+                        && node.parent.kind === 259 /* HeritageClause */
                         && ts.isClassLike(node.parent.parent)) {
                         return node.parent.parent;
                     }
-                    else if (node.kind === 69 /* Identifier */ || node.kind === 172 /* PropertyAccessExpression */) {
+                    else if (node.kind === 71 /* Identifier */ || node.kind === 179 /* PropertyAccessExpression */) {
                         return getContainingClassIfInHeritageClause(node.parent);
                     }
                 }
@@ -66139,15 +79831,18 @@ var ts;
              * Returns true if this is an expression that can be considered an implementation
              */
             function isImplementationExpression(node) {
-                // Unwrap parentheses
-                if (node.kind === 178 /* ParenthesizedExpression */) {
-                    return isImplementationExpression(node.expression);
+                switch (node.kind) {
+                    case 185 /* ParenthesizedExpression */:
+                        return isImplementationExpression(node.expression);
+                    case 187 /* ArrowFunction */:
+                    case 186 /* FunctionExpression */:
+                    case 178 /* ObjectLiteralExpression */:
+                    case 199 /* ClassExpression */:
+                    case 177 /* ArrayLiteralExpression */:
+                        return true;
+                    default:
+                        return false;
                 }
-                return node.kind === 180 /* ArrowFunction */ ||
-                    node.kind === 179 /* FunctionExpression */ ||
-                    node.kind === 171 /* ObjectLiteralExpression */ ||
-                    node.kind === 192 /* ClassExpression */ ||
-                    node.kind === 170 /* ArrayLiteralExpression */;
             }
             /**
              * Determines if the parent symbol occurs somewhere in the child's ancestry. If the parent symbol
@@ -66168,7 +79863,7 @@ var ts;
              * @param parent        Another class or interface Symbol
              * @param cachedResults A map of symbol id pairs (i.e. "child,parent") to booleans indicating previous results
              */
-            function explicitlyInheritsFrom(child, parent, cachedResults) {
+            function explicitlyInheritsFrom(child, parent, cachedResults, checker) {
                 var parentIsInterface = parent.getFlags() & 64 /* Interface */;
                 return searchHierarchy(child);
                 function searchHierarchy(symbol) {
@@ -66176,11 +79871,12 @@ var ts;
                         return true;
                     }
                     var key = ts.getSymbolId(symbol) + "," + ts.getSymbolId(parent);
-                    if (key in cachedResults) {
-                        return cachedResults[key];
+                    var cached = cachedResults.get(key);
+                    if (cached !== undefined) {
+                        return cached;
                     }
                     // Set the key so that we don't infinitely recurse
-                    cachedResults[key] = false;
+                    cachedResults.set(key, false);
                     var inherits = ts.forEach(symbol.getDeclarations(), function (declaration) {
                         if (ts.isClassLike(declaration)) {
                             if (parentIsInterface) {
@@ -66196,19 +79892,19 @@ var ts;
                             }
                             return searchTypeReference(ts.getClassExtendsHeritageClauseElement(declaration));
                         }
-                        else if (declaration.kind === 222 /* InterfaceDeclaration */) {
+                        else if (declaration.kind === 230 /* InterfaceDeclaration */) {
                             if (parentIsInterface) {
                                 return ts.forEach(ts.getInterfaceBaseTypeNodes(declaration), searchTypeReference);
                             }
                         }
                         return false;
                     });
-                    cachedResults[key] = inherits;
+                    cachedResults.set(key, inherits);
                     return inherits;
                 }
                 function searchTypeReference(typeReference) {
                     if (typeReference) {
-                        var type = typeChecker.getTypeAtLocation(typeReference);
+                        var type = checker.getTypeAtLocation(typeReference);
                         if (type && type.symbol) {
                             return searchHierarchy(type.symbol);
                         }
@@ -66224,13 +79920,13 @@ var ts;
                 // Whether 'super' occurs in a static context within a class.
                 var staticFlag = 32 /* Static */;
                 switch (searchSpaceNode.kind) {
-                    case 145 /* PropertyDeclaration */:
-                    case 144 /* PropertySignature */:
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                    case 148 /* Constructor */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
+                    case 149 /* PropertyDeclaration */:
+                    case 148 /* PropertySignature */:
+                    case 151 /* MethodDeclaration */:
+                    case 150 /* MethodSignature */:
+                    case 152 /* Constructor */:
+                    case 153 /* GetAccessor */:
+                    case 154 /* SetAccessor */:
                         staticFlag &= ts.getModifierFlags(searchSpaceNode);
                         searchSpaceNode = searchSpaceNode.parent; // re-assign to be the owning class
                         break;
@@ -66239,50 +79935,49 @@ var ts;
                 }
                 var references = [];
                 var sourceFile = searchSpaceNode.getSourceFile();
-                var possiblePositions = getPossibleSymbolReferencePositions(sourceFile, "super", searchSpaceNode.getStart(), searchSpaceNode.getEnd());
-                ts.forEach(possiblePositions, function (position) {
-                    cancellationToken.throwIfCancellationRequested();
-                    var node = ts.getTouchingWord(sourceFile, position);
-                    if (!node || node.kind !== 95 /* SuperKeyword */) {
-                        return;
+                var possiblePositions = getPossibleSymbolReferencePositions(sourceFile, "super", searchSpaceNode);
+                for (var _i = 0, possiblePositions_3 = possiblePositions; _i < possiblePositions_3.length; _i++) {
+                    var position = possiblePositions_3[_i];
+                    var node = ts.getTouchingWord(sourceFile, position, /*includeJsDocComment*/ false);
+                    if (!node || node.kind !== 97 /* SuperKeyword */) {
+                        continue;
                     }
                     var container = ts.getSuperContainer(node, /*stopOnFunctions*/ false);
                     // If we have a 'super' container, we must have an enclosing class.
                     // Now make sure the owning class is the same as the search-space
                     // and has the same static qualifier as the original 'super's owner.
                     if (container && (32 /* Static */ & ts.getModifierFlags(container)) === staticFlag && container.parent.symbol === searchSpaceNode.symbol) {
-                        references.push(getReferenceEntryFromNode(node));
+                        references.push(FindAllReferences.nodeEntry(node));
                     }
-                });
-                var definition = getDefinition(searchSpaceNode.symbol);
-                return [{ definition: definition, references: references }];
+                }
+                return [{ definition: { type: "symbol", symbol: searchSpaceNode.symbol, node: superKeyword }, references: references }];
             }
-            function getReferencesForThisKeyword(thisOrSuperKeyword, sourceFiles) {
+            function getReferencesForThisKeyword(thisOrSuperKeyword, sourceFiles, cancellationToken) {
                 var searchSpaceNode = ts.getThisContainer(thisOrSuperKeyword, /* includeArrowFunctions */ false);
                 // Whether 'this' occurs in a static context within a class.
                 var staticFlag = 32 /* Static */;
                 switch (searchSpaceNode.kind) {
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
+                    case 151 /* MethodDeclaration */:
+                    case 150 /* MethodSignature */:
                         if (ts.isObjectLiteralMethod(searchSpaceNode)) {
                             break;
                         }
-                    // fall through
-                    case 145 /* PropertyDeclaration */:
-                    case 144 /* PropertySignature */:
-                    case 148 /* Constructor */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
+                    // falls through
+                    case 149 /* PropertyDeclaration */:
+                    case 148 /* PropertySignature */:
+                    case 152 /* Constructor */:
+                    case 153 /* GetAccessor */:
+                    case 154 /* SetAccessor */:
                         staticFlag &= ts.getModifierFlags(searchSpaceNode);
                         searchSpaceNode = searchSpaceNode.parent; // re-assign to be the owning class
                         break;
-                    case 256 /* SourceFile */:
+                    case 265 /* SourceFile */:
                         if (ts.isExternalModule(searchSpaceNode)) {
                             return undefined;
                         }
-                    // Fall through
-                    case 220 /* FunctionDeclaration */:
-                    case 179 /* FunctionExpression */:
+                    // falls through
+                    case 228 /* FunctionDeclaration */:
+                    case 186 /* FunctionExpression */:
                         break;
                     // Computed properties in classes are not handled here because references to this are illegal,
                     // so there is no point finding references to them.
@@ -66291,155 +79986,115 @@ var ts;
                 }
                 var references = [];
                 var possiblePositions;
-                if (searchSpaceNode.kind === 256 /* SourceFile */) {
+                if (searchSpaceNode.kind === 265 /* SourceFile */) {
                     ts.forEach(sourceFiles, function (sourceFile) {
-                        possiblePositions = getPossibleSymbolReferencePositions(sourceFile, "this", sourceFile.getStart(), sourceFile.getEnd());
+                        cancellationToken.throwIfCancellationRequested();
+                        possiblePositions = getPossibleSymbolReferencePositions(sourceFile, "this");
                         getThisReferencesInFile(sourceFile, sourceFile, possiblePositions, references);
                     });
                 }
                 else {
                     var sourceFile = searchSpaceNode.getSourceFile();
-                    possiblePositions = getPossibleSymbolReferencePositions(sourceFile, "this", searchSpaceNode.getStart(), searchSpaceNode.getEnd());
+                    possiblePositions = getPossibleSymbolReferencePositions(sourceFile, "this", searchSpaceNode);
                     getThisReferencesInFile(sourceFile, searchSpaceNode, possiblePositions, references);
                 }
-                var thisOrSuperSymbol = typeChecker.getSymbolAtLocation(thisOrSuperKeyword);
-                var displayParts = thisOrSuperSymbol && ts.SymbolDisplay.getSymbolDisplayPartsDocumentationAndSymbolKind(typeChecker, thisOrSuperSymbol, thisOrSuperKeyword.getSourceFile(), ts.getContainerNode(thisOrSuperKeyword), thisOrSuperKeyword).displayParts;
                 return [{
-                        definition: {
-                            containerKind: "",
-                            containerName: "",
-                            fileName: node.getSourceFile().fileName,
-                            kind: ts.ScriptElementKind.variableElement,
-                            name: "this",
-                            textSpan: ts.createTextSpanFromBounds(node.getStart(), node.getEnd()),
-                            displayParts: displayParts
-                        },
+                        definition: { type: "this", node: thisOrSuperKeyword },
                         references: references
                     }];
                 function getThisReferencesInFile(sourceFile, searchSpaceNode, possiblePositions, result) {
                     ts.forEach(possiblePositions, function (position) {
-                        cancellationToken.throwIfCancellationRequested();
-                        var node = ts.getTouchingWord(sourceFile, position);
+                        var node = ts.getTouchingWord(sourceFile, position, /*includeJsDocComment*/ false);
                         if (!node || !ts.isThis(node)) {
                             return;
                         }
                         var container = ts.getThisContainer(node, /* includeArrowFunctions */ false);
                         switch (searchSpaceNode.kind) {
-                            case 179 /* FunctionExpression */:
-                            case 220 /* FunctionDeclaration */:
+                            case 186 /* FunctionExpression */:
+                            case 228 /* FunctionDeclaration */:
                                 if (searchSpaceNode.symbol === container.symbol) {
-                                    result.push(getReferenceEntryFromNode(node));
+                                    result.push(FindAllReferences.nodeEntry(node));
                                 }
                                 break;
-                            case 147 /* MethodDeclaration */:
-                            case 146 /* MethodSignature */:
+                            case 151 /* MethodDeclaration */:
+                            case 150 /* MethodSignature */:
                                 if (ts.isObjectLiteralMethod(searchSpaceNode) && searchSpaceNode.symbol === container.symbol) {
-                                    result.push(getReferenceEntryFromNode(node));
+                                    result.push(FindAllReferences.nodeEntry(node));
                                 }
                                 break;
-                            case 192 /* ClassExpression */:
-                            case 221 /* ClassDeclaration */:
+                            case 199 /* ClassExpression */:
+                            case 229 /* ClassDeclaration */:
                                 // Make sure the container belongs to the same class
                                 // and has the appropriate static modifier from the original container.
                                 if (container.parent && searchSpaceNode.symbol === container.parent.symbol && (ts.getModifierFlags(container) & 32 /* Static */) === staticFlag) {
-                                    result.push(getReferenceEntryFromNode(node));
+                                    result.push(FindAllReferences.nodeEntry(node));
                                 }
                                 break;
-                            case 256 /* SourceFile */:
-                                if (container.kind === 256 /* SourceFile */ && !ts.isExternalModule(container)) {
-                                    result.push(getReferenceEntryFromNode(node));
+                            case 265 /* SourceFile */:
+                                if (container.kind === 265 /* SourceFile */ && !ts.isExternalModule(container)) {
+                                    result.push(FindAllReferences.nodeEntry(node));
                                 }
                                 break;
                         }
                     });
                 }
             }
-            function getReferencesForStringLiteral(node, sourceFiles) {
-                var type = ts.getStringLiteralTypeForNode(node, typeChecker);
-                if (!type) {
-                    // nothing to do here. moving on
-                    return undefined;
-                }
+            function getReferencesForStringLiteral(node, sourceFiles, cancellationToken) {
                 var references = [];
-                for (var _i = 0, sourceFiles_9 = sourceFiles; _i < sourceFiles_9.length; _i++) {
-                    var sourceFile = sourceFiles_9[_i];
-                    var possiblePositions = getPossibleSymbolReferencePositions(sourceFile, type.text, sourceFile.getStart(), sourceFile.getEnd());
-                    getReferencesForStringLiteralInFile(sourceFile, type, possiblePositions, references);
+                for (var _i = 0, sourceFiles_7 = sourceFiles; _i < sourceFiles_7.length; _i++) {
+                    var sourceFile = sourceFiles_7[_i];
+                    cancellationToken.throwIfCancellationRequested();
+                    var possiblePositions = getPossibleSymbolReferencePositions(sourceFile, node.text);
+                    getReferencesForStringLiteralInFile(sourceFile, node.text, possiblePositions, references);
                 }
                 return [{
-                        definition: {
-                            containerKind: "",
-                            containerName: "",
-                            fileName: node.getSourceFile().fileName,
-                            kind: ts.ScriptElementKind.variableElement,
-                            name: type.text,
-                            textSpan: ts.createTextSpanFromBounds(node.getStart(), node.getEnd()),
-                            displayParts: [ts.displayPart(ts.getTextOfNode(node), ts.SymbolDisplayPartKind.stringLiteral)]
-                        },
+                        definition: { type: "string", node: node },
                         references: references
                     }];
-                function getReferencesForStringLiteralInFile(sourceFile, searchType, possiblePositions, references) {
-                    for (var _i = 0, possiblePositions_1 = possiblePositions; _i < possiblePositions_1.length; _i++) {
-                        var position = possiblePositions_1[_i];
-                        cancellationToken.throwIfCancellationRequested();
-                        var node_2 = ts.getTouchingWord(sourceFile, position);
-                        if (!node_2 || node_2.kind !== 9 /* StringLiteral */) {
-                            return;
-                        }
-                        var type_1 = ts.getStringLiteralTypeForNode(node_2, typeChecker);
-                        if (type_1 === searchType) {
-                            references.push(getReferenceEntryFromNode(node_2));
+                function getReferencesForStringLiteralInFile(sourceFile, searchText, possiblePositions, references) {
+                    for (var _i = 0, possiblePositions_4 = possiblePositions; _i < possiblePositions_4.length; _i++) {
+                        var position = possiblePositions_4[_i];
+                        var node_7 = ts.getTouchingWord(sourceFile, position, /*includeJsDocComment*/ false);
+                        if (node_7 && node_7.kind === 9 /* StringLiteral */ && node_7.text === searchText) {
+                            references.push(FindAllReferences.nodeEntry(node_7, /*isInString*/ true));
                         }
                     }
                 }
             }
-            function populateSearchSymbolSet(symbol, location) {
+            // For certain symbol kinds, we need to include other symbols in the search set.
+            // This is not needed when searching for re-exports.
+            function populateSearchSymbolSet(symbol, location, checker, implementations) {
                 // The search set contains at least the current symbol
                 var result = [symbol];
-                // If the location is name of property symbol from object literal destructuring pattern
-                // Search the property symbol
-                //      for ( { property: p2 } of elems) { }
-                var containingObjectLiteralElement = getContainingObjectLiteralElement(location);
-                if (containingObjectLiteralElement && containingObjectLiteralElement.kind !== 254 /* ShorthandPropertyAssignment */) {
-                    var propertySymbol = getPropertySymbolOfDestructuringAssignment(location);
-                    if (propertySymbol) {
-                        result.push(propertySymbol);
-                    }
-                }
-                // If the symbol is an alias, add what it aliases to the list
-                //     import {a} from "mod";
-                //     export {a}
-                // If the symbol is an alias to default declaration, add what it aliases to the list
-                //     declare "mod" { export default class B { } }
-                //     import B from "mod";
-                //// For export specifiers, the exported name can be referring to a local symbol, e.g.:
-                ////     import {a} from "mod";
-                ////     export {a as somethingElse}
-                //// We want the *local* declaration of 'a' as declared in the import,
-                //// *not* as declared within "mod" (or farther)
-                var aliasSymbol = getAliasSymbolForPropertyNameSymbol(symbol, location);
-                if (aliasSymbol) {
-                    result = result.concat(populateSearchSymbolSet(aliasSymbol, location));
-                }
-                // If the location is in a context sensitive location (i.e. in an object literal) try
-                // to get a contextual type for it, and add the property symbol from the contextual
-                // type to the search set
+                var containingObjectLiteralElement = ts.getContainingObjectLiteralElement(location);
                 if (containingObjectLiteralElement) {
-                    ts.forEach(getPropertySymbolsFromContextualType(containingObjectLiteralElement), function (contextualSymbol) {
-                        ts.addRange(result, typeChecker.getRootSymbols(contextualSymbol));
+                    // If the location is name of property symbol from object literal destructuring pattern
+                    // Search the property symbol
+                    //      for ( { property: p2 } of elems) { }
+                    if (containingObjectLiteralElement.kind !== 262 /* ShorthandPropertyAssignment */) {
+                        var propertySymbol = getPropertySymbolOfDestructuringAssignment(location, checker);
+                        if (propertySymbol) {
+                            result.push(propertySymbol);
+                        }
+                    }
+                    // If the location is in a context sensitive location (i.e. in an object literal) try
+                    // to get a contextual type for it, and add the property symbol from the contextual
+                    // type to the search set
+                    ts.forEach(getPropertySymbolsFromContextualType(containingObjectLiteralElement, checker), function (contextualSymbol) {
+                        ts.addRange(result, checker.getRootSymbols(contextualSymbol));
                     });
                     /* Because in short-hand property assignment, location has two meaning : property name and as value of the property
-                        * When we do findAllReference at the position of the short-hand property assignment, we would want to have references to position of
-                        * property name and variable declaration of the identifier.
-                        * Like in below example, when querying for all references for an identifier 'name', of the property assignment, the language service
-                        * should show both 'name' in 'obj' and 'name' in variable declaration
-                        *      const name = "Foo";
-                        *      const obj = { name };
-                        * In order to do that, we will populate the search set with the value symbol of the identifier as a value of the property assignment
-                        * so that when matching with potential reference symbol, both symbols from property declaration and variable declaration
-                        * will be included correctly.
-                        */
-                    var shorthandValueSymbol = typeChecker.getShorthandAssignmentValueSymbol(location.parent);
+                     * When we do findAllReference at the position of the short-hand property assignment, we would want to have references to position of
+                     * property name and variable declaration of the identifier.
+                     * Like in below example, when querying for all references for an identifier 'name', of the property assignment, the language service
+                     * should show both 'name' in 'obj' and 'name' in variable declaration
+                     *      const name = "Foo";
+                     *      const obj = { name };
+                     * In order to do that, we will populate the search set with the value symbol of the identifier as a value of the property assignment
+                     * so that when matching with potential reference symbol, both symbols from property declaration and variable declaration
+                     * will be included correctly.
+                     */
+                    var shorthandValueSymbol = checker.getShorthandAssignmentValueSymbol(location.parent);
                     if (shorthandValueSymbol) {
                         result.push(shorthandValueSymbol);
                     }
@@ -66448,27 +80103,28 @@ var ts;
                 // we should include both parameter declaration symbol and property declaration symbol
                 // Parameter Declaration symbol is only visible within function scope, so the symbol is stored in constructor.locals.
                 // Property Declaration symbol is a member of the class, so the symbol is stored in its class Declaration.symbol.members
-                if (symbol.valueDeclaration && symbol.valueDeclaration.kind === 142 /* Parameter */ &&
+                if (symbol.valueDeclaration && symbol.valueDeclaration.kind === 146 /* Parameter */ &&
                     ts.isParameterPropertyDeclaration(symbol.valueDeclaration)) {
-                    result = result.concat(typeChecker.getSymbolsOfParameterPropertyDeclaration(symbol.valueDeclaration, symbol.name));
+                    ts.addRange(result, checker.getSymbolsOfParameterPropertyDeclaration(symbol.valueDeclaration, symbol.name));
                 }
                 // If this is symbol of binding element without propertyName declaration in Object binding pattern
                 // Include the property in the search
-                var bindingElementPropertySymbol = getPropertySymbolOfObjectBindingPatternWithoutPropertyName(symbol);
+                var bindingElementPropertySymbol = getPropertySymbolOfObjectBindingPatternWithoutPropertyName(symbol, checker);
                 if (bindingElementPropertySymbol) {
                     result.push(bindingElementPropertySymbol);
                 }
                 // If this is a union property, add all the symbols from all its source symbols in all unioned types.
                 // If the symbol is an instantiation from a another symbol (e.g. widened symbol) , add the root the list
-                ts.forEach(typeChecker.getRootSymbols(symbol), function (rootSymbol) {
+                for (var _i = 0, _a = checker.getRootSymbols(symbol); _i < _a.length; _i++) {
+                    var rootSymbol = _a[_i];
                     if (rootSymbol !== symbol) {
                         result.push(rootSymbol);
                     }
                     // Add symbol of properties/methods of the same name in base classes and implemented interfaces definitions
                     if (!implementations && rootSymbol.parent && rootSymbol.parent.flags & (32 /* Class */ | 64 /* Interface */)) {
-                        getPropertySymbolsFromBaseTypes(rootSymbol.parent, rootSymbol.getName(), result, /*previousIterationSymbolsCache*/ ts.createMap());
+                        getPropertySymbolsFromBaseTypes(rootSymbol.parent, rootSymbol.getName(), result, /*previousIterationSymbolsCache*/ ts.createMap(), checker);
                     }
-                });
+                }
                 return result;
             }
             /**
@@ -66479,7 +80135,7 @@ var ts;
              * @param previousIterationSymbolsCache a cache of symbol from previous iterations of calling this function to prevent infinite revisiting of the same symbol.
              *                                The value of previousIterationSymbol is undefined when the function is first called.
              */
-            function getPropertySymbolsFromBaseTypes(symbol, propertyName, result, previousIterationSymbolsCache) {
+            function getPropertySymbolsFromBaseTypes(symbol, propertyName, result, previousIterationSymbolsCache, checker) {
                 if (!symbol) {
                     return;
                 }
@@ -66494,7 +80150,7 @@ var ts;
                 // the function will add any found symbol of the property-name, then its sub-routine will call
                 // getPropertySymbolsFromBaseTypes again to walk up any base types to prevent revisiting already
                 // visited symbol, interface "C", the sub-routine will pass the current symbol as previousIterationSymbol.
-                if (symbol.name in previousIterationSymbolsCache) {
+                if (previousIterationSymbolsCache.has(symbol.name)) {
                     return;
                 }
                 if (symbol.flags & (32 /* Class */ | 64 /* Interface */)) {
@@ -66503,7 +80159,7 @@ var ts;
                             getPropertySymbolFromTypeReference(ts.getClassExtendsHeritageClauseElement(declaration));
                             ts.forEach(ts.getClassImplementsHeritageClauseElements(declaration), getPropertySymbolFromTypeReference);
                         }
-                        else if (declaration.kind === 222 /* InterfaceDeclaration */) {
+                        else if (declaration.kind === 230 /* InterfaceDeclaration */) {
                             ts.forEach(ts.getInterfaceBaseTypeNodes(declaration), getPropertySymbolFromTypeReference);
                         }
                     });
@@ -66511,37 +80167,30 @@ var ts;
                 return;
                 function getPropertySymbolFromTypeReference(typeReference) {
                     if (typeReference) {
-                        var type = typeChecker.getTypeAtLocation(typeReference);
+                        var type = checker.getTypeAtLocation(typeReference);
                         if (type) {
-                            var propertySymbol = typeChecker.getPropertyOfType(type, propertyName);
+                            var propertySymbol = checker.getPropertyOfType(type, propertyName);
                             if (propertySymbol) {
-                                result.push.apply(result, typeChecker.getRootSymbols(propertySymbol));
+                                result.push.apply(result, checker.getRootSymbols(propertySymbol));
                             }
                             // Visit the typeReference as well to see if it directly or indirectly use that property
-                            previousIterationSymbolsCache[symbol.name] = symbol;
-                            getPropertySymbolsFromBaseTypes(type.symbol, propertyName, result, previousIterationSymbolsCache);
+                            previousIterationSymbolsCache.set(symbol.name, symbol);
+                            getPropertySymbolsFromBaseTypes(type.symbol, propertyName, result, previousIterationSymbolsCache, checker);
                         }
                     }
                 }
             }
-            function getRelatedSymbol(searchSymbols, referenceSymbol, referenceLocation, searchLocationIsConstructor, parents, cache) {
-                if (ts.contains(searchSymbols, referenceSymbol)) {
-                    // If we are searching for constructor uses, they must be 'new' expressions.
-                    return (!searchLocationIsConstructor || ts.isNewExpressionTarget(referenceLocation)) && referenceSymbol;
-                }
-                // If the reference symbol is an alias, check if what it is aliasing is one of the search
-                // symbols but by looking up for related symbol of this alias so it can handle multiple level of indirectness.
-                var aliasSymbol = getAliasSymbolForPropertyNameSymbol(referenceSymbol, referenceLocation);
-                if (aliasSymbol) {
-                    return getRelatedSymbol(searchSymbols, aliasSymbol, referenceLocation, searchLocationIsConstructor, parents, cache);
+            function getRelatedSymbol(search, referenceSymbol, referenceLocation, state) {
+                if (search.includes(referenceSymbol)) {
+                    return referenceSymbol;
                 }
                 // If the reference location is in an object literal, try to get the contextual type for the
                 // object literal, lookup the property symbol in the contextual type, and use this symbol to
                 // compare to our searchSymbol
-                var containingObjectLiteralElement = getContainingObjectLiteralElement(referenceLocation);
+                var containingObjectLiteralElement = ts.getContainingObjectLiteralElement(referenceLocation);
                 if (containingObjectLiteralElement) {
-                    var contextualSymbol = ts.forEach(getPropertySymbolsFromContextualType(containingObjectLiteralElement), function (contextualSymbol) {
-                        return ts.forEach(typeChecker.getRootSymbols(contextualSymbol), function (s) { return searchSymbols.indexOf(s) >= 0 ? s : undefined; });
+                    var contextualSymbol = ts.forEach(getPropertySymbolsFromContextualType(containingObjectLiteralElement, state.checker), function (contextualSymbol) {
+                        return ts.find(state.checker.getRootSymbols(contextualSymbol), search.includes);
                     });
                     if (contextualSymbol) {
                         return contextualSymbol;
@@ -66550,23 +80199,23 @@ var ts;
                     // Get the property symbol from the object literal's type and look if thats the search symbol
                     // In below eg. get 'property' from type of elems iterating type
                     //      for ( { property: p2 } of elems) { }
-                    var propertySymbol = getPropertySymbolOfDestructuringAssignment(referenceLocation);
-                    if (propertySymbol && searchSymbols.indexOf(propertySymbol) >= 0) {
+                    var propertySymbol = getPropertySymbolOfDestructuringAssignment(referenceLocation, state.checker);
+                    if (propertySymbol && search.includes(propertySymbol)) {
                         return propertySymbol;
                     }
                 }
                 // If the reference location is the binding element and doesn't have property name
                 // then include the binding element in the related symbols
                 //      let { a } : { a };
-                var bindingElementPropertySymbol = getPropertySymbolOfObjectBindingPatternWithoutPropertyName(referenceSymbol);
-                if (bindingElementPropertySymbol && searchSymbols.indexOf(bindingElementPropertySymbol) >= 0) {
+                var bindingElementPropertySymbol = getPropertySymbolOfObjectBindingPatternWithoutPropertyName(referenceSymbol, state.checker);
+                if (bindingElementPropertySymbol && search.includes(bindingElementPropertySymbol)) {
                     return bindingElementPropertySymbol;
                 }
                 // Unwrap symbols to get to the root (e.g. transient symbols as a result of widening)
                 // Or a union property, use its underlying unioned symbols
-                return ts.forEach(typeChecker.getRootSymbols(referenceSymbol), function (rootSymbol) {
+                return ts.forEach(state.checker.getRootSymbols(referenceSymbol), function (rootSymbol) {
                     // if it is in the list, then we are done
-                    if (searchSymbols.indexOf(rootSymbol) >= 0) {
+                    if (search.includes(rootSymbol)) {
                         return rootSymbol;
                     }
                     // Finally, try all properties with the same name in any type the containing type extended or implemented, and
@@ -66574,58 +80223,58 @@ var ts;
                     // parent symbol
                     if (rootSymbol.parent && rootSymbol.parent.flags & (32 /* Class */ | 64 /* Interface */)) {
                         // Parents will only be defined if implementations is true
-                        if (parents) {
-                            if (!ts.forEach(parents, function (parent) { return explicitlyInheritsFrom(rootSymbol.parent, parent, cache); })) {
-                                return undefined;
-                            }
+                        if (search.parents && !ts.some(search.parents, function (parent) { return explicitlyInheritsFrom(rootSymbol.parent, parent, state.inheritsFromCache, state.checker); })) {
+                            return undefined;
                         }
-                        var result_3 = [];
-                        getPropertySymbolsFromBaseTypes(rootSymbol.parent, rootSymbol.getName(), result_3, /*previousIterationSymbolsCache*/ ts.createMap());
-                        return ts.forEach(result_3, function (s) { return searchSymbols.indexOf(s) >= 0 ? s : undefined; });
+                        var result = [];
+                        getPropertySymbolsFromBaseTypes(rootSymbol.parent, rootSymbol.getName(), result, /*previousIterationSymbolsCache*/ ts.createMap(), state.checker);
+                        return ts.find(result, search.includes);
                     }
                     return undefined;
                 });
             }
             function getNameFromObjectLiteralElement(node) {
-                if (node.name.kind === 140 /* ComputedPropertyName */) {
+                if (node.name.kind === 144 /* ComputedPropertyName */) {
                     var nameExpression = node.name.expression;
                     // treat computed property names where expression is string/numeric literal as just string/numeric literal
-                    if (ts.isStringOrNumericLiteral(nameExpression.kind)) {
+                    if (ts.isStringOrNumericLiteral(nameExpression)) {
                         return nameExpression.text;
                     }
                     return undefined;
                 }
                 return node.name.text;
             }
-            function getPropertySymbolsFromContextualType(node) {
+            /** Gets all symbols for one property. Does not get symbols for every property. */
+            function getPropertySymbolsFromContextualType(node, checker) {
                 var objectLiteral = node.parent;
-                var contextualType = typeChecker.getContextualType(objectLiteral);
+                var contextualType = checker.getContextualType(objectLiteral);
                 var name = getNameFromObjectLiteralElement(node);
                 if (name && contextualType) {
-                    var result_4 = [];
-                    var symbol_2 = contextualType.getProperty(name);
-                    if (symbol_2) {
-                        result_4.push(symbol_2);
+                    var result_6 = [];
+                    var symbol = contextualType.getProperty(name);
+                    if (symbol) {
+                        result_6.push(symbol);
                     }
-                    if (contextualType.flags & 524288 /* Union */) {
+                    if (contextualType.flags & 65536 /* Union */) {
                         ts.forEach(contextualType.types, function (t) {
                             var symbol = t.getProperty(name);
                             if (symbol) {
-                                result_4.push(symbol);
+                                result_6.push(symbol);
                             }
                         });
                     }
-                    return result_4;
+                    return result_6;
                 }
                 return undefined;
             }
-            /** Given an initial searchMeaning, extracted from a location, widen the search scope based on the declarations
-                 * of the corresponding symbol. e.g. if we are searching for "Foo" in value position, but "Foo" references a class
-                * then we need to widen the search to include type positions as well.
-                * On the contrary, if we are searching for "Bar" in type position and we trace bar to an interface, and an uninstantiated
-                * module, we want to keep the search limited to only types, as the two declarations (interface and uninstantiated module)
-                * do not intersect in any of the three spaces.
-                */
+            /**
+             * Given an initial searchMeaning, extracted from a location, widen the search scope based on the declarations
+             * of the corresponding symbol. e.g. if we are searching for "Foo" in value position, but "Foo" references a class
+             * then we need to widen the search to include type positions as well.
+             * On the contrary, if we are searching for "Bar" in type position and we trace bar to an interface, and an uninstantiated
+             * module, we want to keep the search limited to only types, as the two declarations (interface and uninstantiated module)
+             * do not intersect in any of the three spaces.
+             */
             function getIntersectingMeaningFromDeclarations(meaning, declarations) {
                 if (declarations) {
                     var lastIterationMeaning = void 0;
@@ -66636,8 +80285,8 @@ var ts;
                         // To achieve that we will keep iterating until the result stabilizes.
                         // Remember the last meaning
                         lastIterationMeaning = meaning;
-                        for (var _i = 0, declarations_8 = declarations; _i < declarations_8.length; _i++) {
-                            var declaration = declarations_8[_i];
+                        for (var _i = 0, declarations_11 = declarations; _i < declarations_11.length; _i++) {
+                            var declaration = declarations_11[_i];
                             var declarationMeaning = ts.getMeaningFromDeclaration(declaration);
                             if (declarationMeaning & meaning) {
                                 meaning |= declarationMeaning;
@@ -66647,143 +80296,93 @@ var ts;
                 }
                 return meaning;
             }
-        }
-        FindAllReferences.getReferencedSymbolsForNode = getReferencedSymbolsForNode;
-        function convertReferences(referenceSymbols) {
-            if (!referenceSymbols) {
-                return undefined;
-            }
-            var referenceEntries = [];
-            for (var _i = 0, referenceSymbols_1 = referenceSymbols; _i < referenceSymbols_1.length; _i++) {
-                var referenceSymbol = referenceSymbols_1[_i];
-                ts.addRange(referenceEntries, referenceSymbol.references);
-            }
-            return referenceEntries;
-        }
-        FindAllReferences.convertReferences = convertReferences;
-        function isImplementation(node) {
-            if (!node) {
-                return false;
-            }
-            else if (ts.isVariableLike(node)) {
-                if (node.initializer) {
-                    return true;
-                }
-                else if (node.kind === 218 /* VariableDeclaration */) {
-                    var parentStatement = getParentStatementOfVariableDeclaration(node);
-                    return parentStatement && ts.hasModifier(parentStatement, 2 /* Ambient */);
+            function isImplementation(node) {
+                if (!node) {
+                    return false;
                 }
-            }
-            else if (ts.isFunctionLike(node)) {
-                return !!node.body || ts.hasModifier(node, 2 /* Ambient */);
-            }
-            else {
-                switch (node.kind) {
-                    case 221 /* ClassDeclaration */:
-                    case 192 /* ClassExpression */:
-                    case 224 /* EnumDeclaration */:
-                    case 225 /* ModuleDeclaration */:
+                else if (ts.isVariableLike(node)) {
+                    if (node.initializer) {
                         return true;
+                    }
+                    else if (node.kind === 226 /* VariableDeclaration */) {
+                        var parentStatement = getParentStatementOfVariableDeclaration(node);
+                        return parentStatement && ts.hasModifier(parentStatement, 2 /* Ambient */);
+                    }
+                }
+                else if (ts.isFunctionLike(node)) {
+                    return !!node.body || ts.hasModifier(node, 2 /* Ambient */);
                 }
+                else {
+                    switch (node.kind) {
+                        case 229 /* ClassDeclaration */:
+                        case 199 /* ClassExpression */:
+                        case 232 /* EnumDeclaration */:
+                        case 233 /* ModuleDeclaration */:
+                            return true;
+                    }
+                }
+                return false;
             }
-            return false;
-        }
-        function getParentStatementOfVariableDeclaration(node) {
-            if (node.parent && node.parent.parent && node.parent.parent.kind === 200 /* VariableStatement */) {
-                ts.Debug.assert(node.parent.kind === 219 /* VariableDeclarationList */);
-                return node.parent.parent;
+            function getParentStatementOfVariableDeclaration(node) {
+                if (node.parent && node.parent.parent && node.parent.parent.kind === 208 /* VariableStatement */) {
+                    ts.Debug.assert(node.parent.kind === 227 /* VariableDeclarationList */);
+                    return node.parent.parent;
+                }
             }
-        }
-        function getReferenceEntriesForShorthandPropertyAssignment(node, typeChecker, result) {
-            var refSymbol = typeChecker.getSymbolAtLocation(node);
-            var shorthandSymbol = typeChecker.getShorthandAssignmentValueSymbol(refSymbol.valueDeclaration);
-            if (shorthandSymbol) {
-                for (var _i = 0, _a = shorthandSymbol.getDeclarations(); _i < _a.length; _i++) {
-                    var declaration = _a[_i];
-                    if (ts.getMeaningFromDeclaration(declaration) & 1 /* Value */) {
-                        result.push(getReferenceEntryFromNode(declaration));
+            function getReferenceEntriesForShorthandPropertyAssignment(node, checker, addReference) {
+                var refSymbol = checker.getSymbolAtLocation(node);
+                var shorthandSymbol = checker.getShorthandAssignmentValueSymbol(refSymbol.valueDeclaration);
+                if (shorthandSymbol) {
+                    for (var _i = 0, _a = shorthandSymbol.getDeclarations(); _i < _a.length; _i++) {
+                        var declaration = _a[_i];
+                        if (ts.getMeaningFromDeclaration(declaration) & 1 /* Value */) {
+                            addReference(declaration);
+                        }
                     }
                 }
             }
-        }
-        FindAllReferences.getReferenceEntriesForShorthandPropertyAssignment = getReferenceEntriesForShorthandPropertyAssignment;
-        function getReferenceEntryFromNode(node) {
-            var start = node.getStart();
-            var end = node.getEnd();
-            if (node.kind === 9 /* StringLiteral */) {
-                start += 1;
-                end -= 1;
+            Core.getReferenceEntriesForShorthandPropertyAssignment = getReferenceEntriesForShorthandPropertyAssignment;
+            function forEachDescendantOfKind(node, kind, action) {
+                ts.forEachChild(node, function (child) {
+                    if (child.kind === kind) {
+                        action(child);
+                    }
+                    forEachDescendantOfKind(child, kind, action);
+                });
             }
-            return {
-                fileName: node.getSourceFile().fileName,
-                textSpan: ts.createTextSpanFromBounds(start, end),
-                isWriteAccess: isWriteAccess(node),
-                isDefinition: ts.isDeclarationName(node) || ts.isLiteralComputedPropertyDeclarationName(node)
-            };
-        }
-        FindAllReferences.getReferenceEntryFromNode = getReferenceEntryFromNode;
-        /** A node is considered a writeAccess iff it is a name of a declaration or a target of an assignment */
-        function isWriteAccess(node) {
-            if (node.kind === 69 /* Identifier */ && ts.isDeclarationName(node)) {
-                return true;
+            /** Get `C` given `N` if `N` is in the position `class C extends N` or `class C extends foo.N` where `N` is an identifier. */
+            function tryGetClassByExtendingIdentifier(node) {
+                return ts.tryGetClassExtendingExpressionWithTypeArguments(ts.climbPastPropertyAccess(node).parent);
             }
-            var parent = node.parent;
-            if (parent) {
-                if (parent.kind === 186 /* PostfixUnaryExpression */ || parent.kind === 185 /* PrefixUnaryExpression */) {
-                    return true;
-                }
-                else if (parent.kind === 187 /* BinaryExpression */ && parent.left === node) {
-                    var operator = parent.operatorToken.kind;
-                    return 56 /* FirstAssignment */ <= operator && operator <= 68 /* LastAssignment */;
+            function isNameOfExternalModuleImportOrDeclaration(node) {
+                if (node.kind === 9 /* StringLiteral */) {
+                    return ts.isNameOfModuleDeclaration(node) || ts.isExpressionOfExternalModuleImportEqualsDeclaration(node);
                 }
+                return false;
             }
-            return false;
-        }
-        function forEachDescendantOfKind(node, kind, action) {
-            ts.forEachChild(node, function (child) {
-                if (child.kind === kind) {
-                    action(child);
+            /**
+             * If we are just looking for implementations and this is a property access expression, we need to get the
+             * symbol of the local type of the symbol the property is being accessed on. This is because our search
+             * symbol may have a different parent symbol if the local type's symbol does not declare the property
+             * being accessed (i.e. it is declared in some parent class or interface)
+             */
+            function getParentSymbolsOfPropertyAccess(location, symbol, checker) {
+                var propertyAccessExpression = getPropertyAccessExpressionFromRightHandSide(location);
+                if (!propertyAccessExpression) {
+                    return undefined;
+                }
+                var localParentType = checker.getTypeAtLocation(propertyAccessExpression.expression);
+                if (!localParentType) {
+                    return undefined;
+                }
+                if (localParentType.symbol && localParentType.symbol.flags & (32 /* Class */ | 64 /* Interface */) && localParentType.symbol !== symbol.parent) {
+                    return [localParentType.symbol];
+                }
+                else if (localParentType.flags & 196608 /* UnionOrIntersection */) {
+                    return getSymbolsForClassAndInterfaceComponents(localParentType);
                 }
-                forEachDescendantOfKind(child, kind, action);
-            });
-        }
-        /**
-         * Returns the containing object literal property declaration given a possible name node, e.g. "a" in x = { "a": 1 }
-         */
-        function getContainingObjectLiteralElement(node) {
-            switch (node.kind) {
-                case 9 /* StringLiteral */:
-                case 8 /* NumericLiteral */:
-                    if (node.parent.kind === 140 /* ComputedPropertyName */) {
-                        return isObjectLiteralPropertyDeclaration(node.parent.parent) ? node.parent.parent : undefined;
-                    }
-                // intential fall through
-                case 69 /* Identifier */:
-                    return isObjectLiteralPropertyDeclaration(node.parent) && node.parent.name === node ? node.parent : undefined;
-            }
-            return undefined;
-        }
-        function isObjectLiteralPropertyDeclaration(node) {
-            switch (node.kind) {
-                case 253 /* PropertyAssignment */:
-                case 254 /* ShorthandPropertyAssignment */:
-                case 147 /* MethodDeclaration */:
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                    return true;
-            }
-            return false;
-        }
-        /** Get `C` given `N` if `N` is in the position `class C extends N` or `class C extends foo.N` where `N` is an identifier. */
-        function tryGetClassByExtendingIdentifier(node) {
-            return ts.tryGetClassExtendingExpressionWithTypeArguments(ts.climbPastPropertyAccess(node).parent);
-        }
-        function isNameOfExternalModuleImportOrDeclaration(node) {
-            if (node.kind === 9 /* StringLiteral */) {
-                return ts.isNameOfModuleDeclaration(node) || ts.isExpressionOfExternalModuleImportEqualsDeclaration(node);
             }
-            return false;
-        }
+        })(Core = FindAllReferences.Core || (FindAllReferences.Core = {}));
     })(FindAllReferences = ts.FindAllReferences || (ts.FindAllReferences = {}));
 })(ts || (ts = {}));
 /* @internal */
@@ -66799,18 +80398,16 @@ var ts;
                 if (referenceFile) {
                     return [getDefinitionInfoForFileReference(comment.fileName, referenceFile.fileName)];
                 }
-                return undefined;
+                // Might still be on jsdoc, so keep looking.
             }
             // Type reference directives
             var typeReferenceDirective = findReferenceInPosition(sourceFile.typeReferenceDirectives, position);
             if (typeReferenceDirective) {
-                var referenceFile = program.getResolvedTypeReferenceDirectives()[typeReferenceDirective.fileName];
-                if (referenceFile && referenceFile.resolvedFileName) {
-                    return [getDefinitionInfoForFileReference(typeReferenceDirective.fileName, referenceFile.resolvedFileName)];
-                }
-                return undefined;
+                var referenceFile = program.getResolvedTypeReferenceDirectives().get(typeReferenceDirective.fileName);
+                return referenceFile && referenceFile.resolvedFileName &&
+                    [getDefinitionInfoForFileReference(typeReferenceDirective.fileName, referenceFile.resolvedFileName)];
             }
-            var node = ts.getTouchingPropertyName(sourceFile, position);
+            var node = ts.getTouchingPropertyName(sourceFile, position, /*includeJsDocComment*/ true);
             if (node === sourceFile) {
                 return undefined;
             }
@@ -66818,7 +80415,7 @@ var ts;
             if (ts.isJumpStatementTarget(node)) {
                 var labelName = node.text;
                 var label = ts.getTargetLabel(node.parent, node.text);
-                return label ? [createDefinitionInfo(label, ts.ScriptElementKind.label, labelName, /*containerName*/ undefined)] : undefined;
+                return label ? [createDefinitionInfoFromName(label, "label" /* label */, labelName, /*containerName*/ undefined)] : undefined;
             }
             var typeChecker = program.getTypeChecker();
             var calledDeclaration = tryGetSignatureDeclaration(typeChecker, node);
@@ -66835,17 +80432,10 @@ var ts;
             // get the aliased symbol instead. This allows for goto def on an import e.g.
             //   import {A, B} from "mod";
             // to jump to the implementation directly.
-            if (symbol.flags & 8388608 /* Alias */) {
-                var declaration = symbol.declarations[0];
-                // Go to the original declaration for cases:
-                //
-                //   (1) when the aliased symbol was declared in the location(parent).
-                //   (2) when the aliased symbol is originating from a named import.
-                //
-                if (node.kind === 69 /* Identifier */ &&
-                    (node.parent === declaration ||
-                        (declaration.kind === 234 /* ImportSpecifier */ && declaration.parent && declaration.parent.kind === 233 /* NamedImports */))) {
-                    symbol = typeChecker.getAliasedSymbol(symbol);
+            if (symbol.flags & 8388608 /* Alias */ && shouldSkipAlias(node, symbol.declarations[0])) {
+                var aliased = typeChecker.getAliasedSymbol(symbol);
+                if (aliased.declarations) {
+                    symbol = aliased;
                 }
             }
             // Because name in short-hand property assignment has two different meanings: property name and property value,
@@ -66853,7 +80443,7 @@ var ts;
             // go to the declaration of the property name (in this case stay at the same position). However, if go-to-definition
             // is performed at the location of property access, we would like to go to definition of the property in the short-hand
             // assignment. This case and others are handled by the following code.
-            if (node.parent.kind === 254 /* ShorthandPropertyAssignment */) {
+            if (node.parent.kind === 262 /* ShorthandPropertyAssignment */) {
                 var shorthandSymbol = typeChecker.getShorthandAssignmentValueSymbol(symbol.valueDeclaration);
                 if (!shorthandSymbol) {
                     return [];
@@ -66864,12 +80454,27 @@ var ts;
                 var shorthandContainerName_1 = typeChecker.symbolToString(symbol.parent, node);
                 return ts.map(shorthandDeclarations, function (declaration) { return createDefinitionInfo(declaration, shorthandSymbolKind_1, shorthandSymbolName_1, shorthandContainerName_1); });
             }
+            // If the current location we want to find its definition is in an object literal, try to get the contextual type for the
+            // object literal, lookup the property symbol in the contextual type, and use this for goto-definition.
+            // For example
+            //      interface Props{
+            //          /*first*/prop1: number
+            //          prop2: boolean
+            //      }
+            //      function Foo(arg: Props) {}
+            //      Foo( { pr/*1*/op1: 10, prop2: true })
+            var element = ts.getContainingObjectLiteralElement(node);
+            if (element && typeChecker.getContextualType(element.parent)) {
+                return ts.flatMap(ts.getPropertySymbolsFromContextualType(typeChecker, element), function (propertySymbol) {
+                    return getDefinitionFromSymbol(typeChecker, propertySymbol, node);
+                });
+            }
             return getDefinitionFromSymbol(typeChecker, symbol, node);
         }
         GoToDefinition.getDefinitionAtPosition = getDefinitionAtPosition;
         /// Goto type
         function getTypeDefinitionAtPosition(typeChecker, sourceFile, position) {
-            var node = ts.getTouchingPropertyName(sourceFile, position);
+            var node = ts.getTouchingPropertyName(sourceFile, position, /*includeJsDocComment*/ true);
             if (node === sourceFile) {
                 return undefined;
             }
@@ -66881,14 +80486,14 @@ var ts;
             if (!type) {
                 return undefined;
             }
-            if (type.flags & 524288 /* Union */ && !(type.flags & 16 /* Enum */)) {
-                var result_5 = [];
+            if (type.flags & 65536 /* Union */ && !(type.flags & 16 /* Enum */)) {
+                var result_7 = [];
                 ts.forEach(type.types, function (t) {
                     if (t.symbol) {
-                        ts.addRange(/*to*/ result_5, /*from*/ getDefinitionFromSymbol(typeChecker, t.symbol, node));
+                        ts.addRange(/*to*/ result_7, /*from*/ getDefinitionFromSymbol(typeChecker, t.symbol, node));
                     }
                 });
-                return result_5;
+                return result_7;
             }
             if (!type.symbol) {
                 return undefined;
@@ -66896,6 +80501,28 @@ var ts;
             return getDefinitionFromSymbol(typeChecker, type.symbol, node);
         }
         GoToDefinition.getTypeDefinitionAtPosition = getTypeDefinitionAtPosition;
+        // Go to the original declaration for cases:
+        //
+        //   (1) when the aliased symbol was declared in the location(parent).
+        //   (2) when the aliased symbol is originating from an import.
+        //
+        function shouldSkipAlias(node, declaration) {
+            if (node.kind !== 71 /* Identifier */) {
+                return false;
+            }
+            if (node.parent === declaration) {
+                return true;
+            }
+            switch (declaration.kind) {
+                case 239 /* ImportClause */:
+                case 237 /* ImportEqualsDeclaration */:
+                    return true;
+                case 242 /* ImportSpecifier */:
+                    return declaration.parent.kind === 241 /* NamedImports */;
+                default:
+                    return false;
+            }
+        }
         function getDefinitionFromSymbol(typeChecker, symbol, node) {
             var result = [];
             var declarations = symbol.getDeclarations();
@@ -66911,14 +80538,13 @@ var ts;
             function tryAddConstructSignature(symbol, location, symbolKind, symbolName, containerName, result) {
                 // Applicable only if we are in a new expression, or we are on a constructor declaration
                 // and in either case the symbol has a construct signature definition, i.e. class
-                if (ts.isNewExpressionTarget(location) || location.kind === 121 /* ConstructorKeyword */) {
+                if (ts.isNewExpressionTarget(location) || location.kind === 123 /* ConstructorKeyword */) {
                     if (symbol.flags & 32 /* Class */) {
                         // Find the first class-like declaration and try to get the construct signature.
                         for (var _i = 0, _a = symbol.getDeclarations(); _i < _a.length; _i++) {
                             var declaration = _a[_i];
                             if (ts.isClassLike(declaration)) {
-                                return tryAddSignature(declaration.members, 
-                                /*selectConstructors*/ true, symbolKind, symbolName, containerName, result);
+                                return tryAddSignature(declaration.members, /*selectConstructors*/ true, symbolKind, symbolName, containerName, result);
                             }
                         }
                         ts.Debug.fail("Expected declaration to have at least one class-like declaration");
@@ -66933,31 +80559,47 @@ var ts;
                 return false;
             }
             function tryAddSignature(signatureDeclarations, selectConstructors, symbolKind, symbolName, containerName, result) {
+                if (!signatureDeclarations) {
+                    return false;
+                }
                 var declarations = [];
                 var definition;
-                ts.forEach(signatureDeclarations, function (d) {
-                    if ((selectConstructors && d.kind === 148 /* Constructor */) ||
-                        (!selectConstructors && (d.kind === 220 /* FunctionDeclaration */ || d.kind === 147 /* MethodDeclaration */ || d.kind === 146 /* MethodSignature */))) {
+                for (var _i = 0, signatureDeclarations_1 = signatureDeclarations; _i < signatureDeclarations_1.length; _i++) {
+                    var d = signatureDeclarations_1[_i];
+                    if (selectConstructors ? d.kind === 152 /* Constructor */ : isSignatureDeclaration(d)) {
                         declarations.push(d);
                         if (d.body)
                             definition = d;
                     }
-                });
-                if (definition) {
-                    result.push(createDefinitionInfo(definition, symbolKind, symbolName, containerName));
-                    return true;
                 }
-                else if (declarations.length) {
-                    result.push(createDefinitionInfo(ts.lastOrUndefined(declarations), symbolKind, symbolName, containerName));
+                if (declarations.length) {
+                    result.push(createDefinitionInfo(definition || ts.lastOrUndefined(declarations), symbolKind, symbolName, containerName));
                     return true;
                 }
                 return false;
             }
         }
+        function isSignatureDeclaration(node) {
+            switch (node.kind) {
+                case 152 /* Constructor */:
+                case 228 /* FunctionDeclaration */:
+                case 151 /* MethodDeclaration */:
+                case 150 /* MethodSignature */:
+                    return true;
+                default:
+                    return false;
+            }
+        }
+        /** Creates a DefinitionInfo from a Declaration, using the declaration's name if possible. */
         function createDefinitionInfo(node, symbolKind, symbolName, containerName) {
+            return createDefinitionInfoFromName(ts.getNameOfDeclaration(node) || node, symbolKind, symbolName, containerName);
+        }
+        /** Creates a DefinitionInfo directly from the name of a declaration. */
+        function createDefinitionInfoFromName(name, symbolKind, symbolName, containerName) {
+            var sourceFile = name.getSourceFile();
             return {
-                fileName: node.getSourceFile().fileName,
-                textSpan: ts.createTextSpanFromBounds(node.getStart(), node.getEnd()),
+                fileName: sourceFile.fileName,
+                textSpan: ts.createTextSpanFromNode(name, sourceFile),
                 kind: symbolKind,
                 name: symbolName,
                 containerKind: undefined,
@@ -66978,7 +80620,7 @@ var ts;
         function findReferenceInPosition(refs, pos) {
             for (var _i = 0, refs_1 = refs; _i < refs_1.length; _i++) {
                 var ref = refs_1[_i];
-                if (ref.pos <= pos && pos < ref.end) {
+                if (ref.pos <= pos && pos <= ref.end) {
                     return ref;
                 }
             }
@@ -66988,7 +80630,7 @@ var ts;
             return {
                 fileName: targetFileName,
                 textSpan: ts.createTextSpanFromBounds(0, 0),
-                kind: ts.ScriptElementKind.scriptElement,
+                kind: "script" /* scriptElement */,
                 name: name,
                 containerName: undefined,
                 containerKind: undefined
@@ -67005,43 +80647,17 @@ var ts;
         }
         function tryGetSignatureDeclaration(typeChecker, node) {
             var callLike = getAncestorCallLikeExpression(node);
-            return callLike && typeChecker.getResolvedSignature(callLike).declaration;
-        }
-    })(GoToDefinition = ts.GoToDefinition || (ts.GoToDefinition = {}));
-})(ts || (ts = {}));
-/* @internal */
-var ts;
-(function (ts) {
-    var GoToImplementation;
-    (function (GoToImplementation) {
-        function getImplementationAtPosition(typeChecker, cancellationToken, sourceFiles, node) {
-            // If invoked directly on a shorthand property assignment, then return
-            // the declaration of the symbol being assigned (not the symbol being assigned to).
-            if (node.parent.kind === 254 /* ShorthandPropertyAssignment */) {
-                var result = [];
-                ts.FindAllReferences.getReferenceEntriesForShorthandPropertyAssignment(node, typeChecker, result);
-                return result.length > 0 ? result : undefined;
-            }
-            else if (node.kind === 95 /* SuperKeyword */ || ts.isSuperProperty(node.parent)) {
-                // References to and accesses on the super keyword only have one possible implementation, so no
-                // need to "Find all References"
-                var symbol = typeChecker.getSymbolAtLocation(node);
-                return symbol.valueDeclaration && [ts.FindAllReferences.getReferenceEntryFromNode(symbol.valueDeclaration)];
-            }
-            else {
-                // Perform "Find all References" and retrieve only those that are implementations
-                var referencedSymbols = ts.FindAllReferences.getReferencedSymbolsForNode(typeChecker, cancellationToken, node, sourceFiles, /*findInStrings*/ false, /*findInComments*/ false, /*implementations*/ true);
-                var result = ts.flatMap(referencedSymbols, function (symbol) {
-                    return ts.map(symbol.references, function (_a) {
-                        var textSpan = _a.textSpan, fileName = _a.fileName;
-                        return ({ textSpan: textSpan, fileName: fileName });
-                    });
-                });
-                return result && result.length > 0 ? result : undefined;
+            var signature = callLike && typeChecker.getResolvedSignature(callLike);
+            if (signature) {
+                var decl = signature.declaration;
+                if (decl && isSignatureDeclaration(decl)) {
+                    return decl;
+                }
             }
+            // Don't go to a function type, go to the value having that type.
+            return undefined;
         }
-        GoToImplementation.getImplementationAtPosition = getImplementationAtPosition;
-    })(GoToImplementation = ts.GoToImplementation || (ts.GoToImplementation = {}));
+    })(GoToDefinition = ts.GoToDefinition || (ts.GoToDefinition = {}));
 })(ts || (ts = {}));
 /* @internal */
 var ts;
@@ -67071,10 +80687,12 @@ var ts;
             "lends",
             "link",
             "memberOf",
+            "method",
             "name",
             "namespace",
             "param",
             "private",
+            "prop",
             "property",
             "public",
             "requires",
@@ -67085,12 +80703,11 @@ var ts;
             "throws",
             "type",
             "typedef",
-            "property",
-            "prop",
             "version"
         ];
-        var jsDocCompletionEntries;
-        function getJsDocCommentsFromDeclarations(declarations, name, canUseParsedParamTagComments) {
+        var jsDocTagNameCompletionEntries;
+        var jsDocTagCompletionEntries;
+        function getJsDocCommentsFromDeclarations(declarations) {
             // Only collect doc comments from duplicate declarations once:
             // In case of a union property there might be same declaration multiple times
             // which only varies in type parameter
@@ -67099,7 +80716,7 @@ var ts;
             // from Array<T> - Array<string> and Array<number>
             var documentationComment = [];
             forEachUnique(declarations, function (declaration) {
-                var comments = ts.getJSDocComments(declaration, /*checkParentVariableStatement*/ true);
+                var comments = ts.getCommentsFromJSDoc(declaration);
                 if (!comments) {
                     return;
                 }
@@ -67116,6 +80733,30 @@ var ts;
             return documentationComment;
         }
         JsDoc.getJsDocCommentsFromDeclarations = getJsDocCommentsFromDeclarations;
+        function getJsDocTagsFromDeclarations(declarations) {
+            // Only collect doc comments from duplicate declarations once.
+            var tags = [];
+            forEachUnique(declarations, function (declaration) {
+                var jsDocs = ts.getJSDocs(declaration);
+                if (!jsDocs) {
+                    return;
+                }
+                for (var _i = 0, jsDocs_1 = jsDocs; _i < jsDocs_1.length; _i++) {
+                    var doc = jsDocs_1[_i];
+                    var tagsForDoc = doc.tags;
+                    if (tagsForDoc) {
+                        tags.push.apply(tags, tagsForDoc.filter(function (tag) { return tag.kind === 284 /* JSDocTag */; }).map(function (jsDocTag) {
+                            return {
+                                name: jsDocTag.tagName.text,
+                                text: jsDocTag.comment
+                            };
+                        }));
+                    }
+                }
+            });
+            return tags;
+        }
+        JsDoc.getJsDocTagsFromDeclarations = getJsDocTagsFromDeclarations;
         /**
          * Iterates through 'array' by index and performs the callback on each element of array until the callback
          * returns a truthy value, then returns that value.
@@ -67123,7 +80764,7 @@ var ts;
          */
         function forEachUnique(array, callback) {
             if (array) {
-                for (var i = 0, len = array.length; i < len; i++) {
+                for (var i = 0; i < array.length; i++) {
                     if (ts.indexOf(array, array[i]) === i) {
                         var result = callback(array[i], i);
                         if (result) {
@@ -67134,17 +80775,46 @@ var ts;
             }
             return undefined;
         }
-        function getAllJsDocCompletionEntries() {
-            return jsDocCompletionEntries || (jsDocCompletionEntries = ts.map(jsDocTagNames, function (tagName) {
+        function getJSDocTagNameCompletions() {
+            return jsDocTagNameCompletionEntries || (jsDocTagNameCompletionEntries = ts.map(jsDocTagNames, function (tagName) {
                 return {
                     name: tagName,
-                    kind: ts.ScriptElementKind.keyword,
+                    kind: "keyword" /* keyword */,
                     kindModifiers: "",
                     sortText: "0",
                 };
             }));
         }
-        JsDoc.getAllJsDocCompletionEntries = getAllJsDocCompletionEntries;
+        JsDoc.getJSDocTagNameCompletions = getJSDocTagNameCompletions;
+        function getJSDocTagCompletions() {
+            return jsDocTagCompletionEntries || (jsDocTagCompletionEntries = ts.map(jsDocTagNames, function (tagName) {
+                return {
+                    name: "@" + tagName,
+                    kind: "keyword" /* keyword */,
+                    kindModifiers: "",
+                    sortText: "0"
+                };
+            }));
+        }
+        JsDoc.getJSDocTagCompletions = getJSDocTagCompletions;
+        function getJSDocParameterNameCompletions(tag) {
+            var nameThusFar = tag.name.text;
+            var jsdoc = tag.parent;
+            var fn = jsdoc.parent;
+            if (!ts.isFunctionLike(fn))
+                return [];
+            return ts.mapDefined(fn.parameters, function (param) {
+                if (!ts.isIdentifier(param.name))
+                    return undefined;
+                var name = param.name.text;
+                if (jsdoc.tags.some(function (t) { return t !== tag && ts.isJSDocParameterTag(t) && t.name.text === name; })
+                    || nameThusFar !== undefined && !ts.startsWith(name, nameThusFar)) {
+                    return undefined;
+                }
+                return { name: name, kind: "parameter" /* parameterElement */, kindModifiers: "", sortText: "0" };
+            });
+        }
+        JsDoc.getJSDocParameterNameCompletions = getJSDocParameterNameCompletions;
         /**
          * Checks if position points to a valid position to add JSDoc comments, and if so,
          * returns the appropriate template. Otherwise returns an empty string.
@@ -67170,7 +80840,7 @@ var ts;
             if (ts.isInString(sourceFile, position) || ts.isInComment(sourceFile, position) || ts.hasDocComment(sourceFile, position)) {
                 return undefined;
             }
-            var tokenAtPos = ts.getTokenAtPosition(sourceFile, position);
+            var tokenAtPos = ts.getTokenAtPosition(sourceFile, position, /*includeJsDocComment*/ false);
             var tokenStart = tokenAtPos.getStart();
             if (!tokenAtPos || tokenStart < position) {
                 return undefined;
@@ -67183,19 +80853,19 @@ var ts;
             var commentOwner;
             findOwner: for (commentOwner = tokenAtPos; commentOwner; commentOwner = commentOwner.parent) {
                 switch (commentOwner.kind) {
-                    case 220 /* FunctionDeclaration */:
-                    case 147 /* MethodDeclaration */:
-                    case 148 /* Constructor */:
-                    case 221 /* ClassDeclaration */:
-                    case 200 /* VariableStatement */:
+                    case 228 /* FunctionDeclaration */:
+                    case 151 /* MethodDeclaration */:
+                    case 152 /* Constructor */:
+                    case 229 /* ClassDeclaration */:
+                    case 208 /* VariableStatement */:
                         break findOwner;
-                    case 256 /* SourceFile */:
+                    case 265 /* SourceFile */:
                         return undefined;
-                    case 225 /* ModuleDeclaration */:
+                    case 233 /* ModuleDeclaration */:
                         // If in walking up the tree, we hit a a nested namespace declaration,
                         // then we must be somewhere within a dotted namespace name; however we don't
                         // want to give back a JSDoc template for the 'b' or 'c' in 'namespace a.b.c { }'.
-                        if (commentOwner.parent.kind === 225 /* ModuleDeclaration */) {
+                        if (commentOwner.parent.kind === 233 /* ModuleDeclaration */) {
                             return undefined;
                         }
                         break findOwner;
@@ -67207,14 +80877,21 @@ var ts;
             var parameters = getParametersForJsDocOwningNode(commentOwner);
             var posLineAndChar = sourceFile.getLineAndCharacterOfPosition(position);
             var lineStart = sourceFile.getLineStarts()[posLineAndChar.line];
-            var indentationStr = sourceFile.text.substr(lineStart, posLineAndChar.character);
+            // replace non-whitespace characters in prefix with spaces.
+            var indentationStr = sourceFile.text.substr(lineStart, posLineAndChar.character).replace(/\S/i, function () { return " "; });
+            var isJavaScriptFile = ts.hasJavaScriptFileExtension(sourceFile.fileName);
             var docParams = "";
-            for (var i = 0, numParams = parameters.length; i < numParams; i++) {
+            for (var i = 0; i < parameters.length; i++) {
                 var currentName = parameters[i].name;
-                var paramName = currentName.kind === 69 /* Identifier */ ?
+                var paramName = currentName.kind === 71 /* Identifier */ ?
                     currentName.text :
                     "param" + i;
-                docParams += indentationStr + " * @param " + paramName + newLine;
+                if (isJavaScriptFile) {
+                    docParams += indentationStr + " * @param {any} " + paramName + newLine;
+                }
+                else {
+                    docParams += indentationStr + " * @param " + paramName + newLine;
+                }
             }
             // A doc comment consists of the following
             // * The opening comment line
@@ -67236,7 +80913,7 @@ var ts;
             if (ts.isFunctionLike(commentOwner)) {
                 return commentOwner.parameters;
             }
-            if (commentOwner.kind === 200 /* VariableStatement */) {
+            if (commentOwner.kind === 208 /* VariableStatement */) {
                 var varStatement = commentOwner;
                 var varDeclarations = varStatement.declarationList.declarations;
                 if (varDeclarations.length === 1 && varDeclarations[0].initializer) {
@@ -67254,17 +80931,17 @@ var ts;
          * @returns the parameters of a signature found on the RHS if one exists; otherwise 'emptyArray'.
          */
         function getParametersFromRightHandSideOfAssignment(rightHandSide) {
-            while (rightHandSide.kind === 178 /* ParenthesizedExpression */) {
+            while (rightHandSide.kind === 185 /* ParenthesizedExpression */) {
                 rightHandSide = rightHandSide.expression;
             }
             switch (rightHandSide.kind) {
-                case 179 /* FunctionExpression */:
-                case 180 /* ArrowFunction */:
+                case 186 /* FunctionExpression */:
+                case 187 /* ArrowFunction */:
                     return rightHandSide.parameters;
-                case 192 /* ClassExpression */:
+                case 199 /* ClassExpression */:
                     for (var _i = 0, _a = rightHandSide.members; _i < _a.length; _i++) {
                         var member = _a[_i];
-                        if (member.kind === 148 /* Constructor */) {
+                        if (member.kind === 152 /* Constructor */) {
                             return member.parameters;
                         }
                     }
@@ -67284,25 +80961,33 @@ var ts;
 (function (ts) {
     var JsTyping;
     (function (JsTyping) {
-        ;
-        ;
         // A map of loose file names to library names
         // that we are confident require typings
         var safeList;
         var EmptySafeList = ts.createMap();
+        /* @internal */
+        JsTyping.nodeCoreModuleList = [
+            "buffer", "querystring", "events", "http", "cluster",
+            "zlib", "os", "https", "punycode", "repl", "readline",
+            "vm", "child_process", "url", "dns", "net",
+            "dgram", "fs", "path", "string_decoder", "tls",
+            "crypto", "stream", "util", "assert", "tty", "domain",
+            "constants", "process", "v8", "timers", "console"
+        ];
+        var nodeCoreModules = ts.arrayToMap(JsTyping.nodeCoreModuleList, function (x) { return x; });
         /**
          * @param host is the object providing I/O related operations.
          * @param fileNames are the file names that belong to the same project
          * @param projectRootPath is the path to the project root directory
          * @param safeListPath is the path used to retrieve the safe list
          * @param packageNameToTypingLocation is the map of package names to their cached typing locations
-         * @param typingOptions are used to customize the typing inference process
+         * @param typeAcquisition is used to customize the typing acquisition process
          * @param compilerOptions are used as a source for typing inference
          */
-        function discoverTypings(host, fileNames, projectRootPath, safeListPath, packageNameToTypingLocation, typingOptions, compilerOptions) {
+        function discoverTypings(host, fileNames, projectRootPath, safeListPath, packageNameToTypingLocation, typeAcquisition, unresolvedImports) {
             // A typing name to typing file path mapping
             var inferredTypings = ts.createMap();
-            if (!typingOptions || !typingOptions.enableAutoDiscovery) {
+            if (!typeAcquisition || !typeAcquisition.enable) {
                 return { cachedTypingPaths: [], newTypingNames: [], filesToWatch: [] };
             }
             // Only infer typings for .js and .jsx files
@@ -67312,16 +80997,16 @@ var ts;
             });
             if (!safeList) {
                 var result = ts.readConfigFile(safeListPath, function (path) { return host.readFile(path); });
-                safeList = result.config ? ts.createMap(result.config) : EmptySafeList;
+                safeList = ts.createMapFromTemplate(result.config);
             }
             var filesToWatch = [];
             // Directories to search for package.json, bower.json and other typing information
             var searchDirs = [];
             var exclude = [];
-            mergeTypings(typingOptions.include);
-            exclude = typingOptions.exclude || [];
+            mergeTypings(typeAcquisition.include);
+            exclude = typeAcquisition.exclude || [];
             var possibleSearchDirs = ts.map(fileNames, ts.getDirectoryPath);
-            if (projectRootPath !== undefined) {
+            if (projectRootPath) {
                 possibleSearchDirs.push(projectRootPath);
             }
             searchDirs = ts.deduplicate(possibleSearchDirs);
@@ -67331,31 +81016,43 @@ var ts;
                 getTypingNamesFromJson(packageJsonPath, filesToWatch);
                 var bowerJsonPath = ts.combinePaths(searchDir, "bower.json");
                 getTypingNamesFromJson(bowerJsonPath, filesToWatch);
+                var bowerComponentsPath = ts.combinePaths(searchDir, "bower_components");
+                getTypingNamesFromPackagesFolder(bowerComponentsPath);
                 var nodeModulesPath = ts.combinePaths(searchDir, "node_modules");
-                getTypingNamesFromNodeModuleFolder(nodeModulesPath);
+                getTypingNamesFromPackagesFolder(nodeModulesPath);
             }
             getTypingNamesFromSourceFileNames(fileNames);
-            // Add the cached typing locations for inferred typings that are already installed
-            for (var name_51 in packageNameToTypingLocation) {
-                if (name_51 in inferredTypings && !inferredTypings[name_51]) {
-                    inferredTypings[name_51] = packageNameToTypingLocation[name_51];
+            // add typings for unresolved imports
+            if (unresolvedImports) {
+                for (var _a = 0, unresolvedImports_1 = unresolvedImports; _a < unresolvedImports_1.length; _a++) {
+                    var moduleId = unresolvedImports_1[_a];
+                    var typingName = nodeCoreModules.has(moduleId) ? "node" : moduleId;
+                    if (!inferredTypings.has(typingName)) {
+                        inferredTypings.set(typingName, undefined);
+                    }
                 }
             }
+            // Add the cached typing locations for inferred typings that are already installed
+            packageNameToTypingLocation.forEach(function (typingLocation, name) {
+                if (inferredTypings.has(name) && inferredTypings.get(name) === undefined) {
+                    inferredTypings.set(name, typingLocation);
+                }
+            });
             // Remove typings that the user has added to the exclude list
-            for (var _a = 0, exclude_1 = exclude; _a < exclude_1.length; _a++) {
-                var excludeTypingName = exclude_1[_a];
-                delete inferredTypings[excludeTypingName];
+            for (var _b = 0, exclude_1 = exclude; _b < exclude_1.length; _b++) {
+                var excludeTypingName = exclude_1[_b];
+                inferredTypings.delete(excludeTypingName);
             }
             var newTypingNames = [];
             var cachedTypingPaths = [];
-            for (var typing in inferredTypings) {
-                if (inferredTypings[typing] !== undefined) {
-                    cachedTypingPaths.push(inferredTypings[typing]);
+            inferredTypings.forEach(function (inferred, typing) {
+                if (inferred !== undefined) {
+                    cachedTypingPaths.push(inferred);
                 }
                 else {
                     newTypingNames.push(typing);
                 }
-            }
+            });
             return { cachedTypingPaths: cachedTypingPaths, newTypingNames: newTypingNames, filesToWatch: filesToWatch };
             /**
              * Merge a given list of typingNames to the inferredTypings map
@@ -67366,8 +81063,8 @@ var ts;
                 }
                 for (var _i = 0, typingNames_1 = typingNames; _i < typingNames_1.length; _i++) {
                     var typing = typingNames_1[_i];
-                    if (!(typing in inferredTypings)) {
-                        inferredTypings[typing] = undefined;
+                    if (!inferredTypings.has(typing)) {
+                        inferredTypings.set(typing, undefined);
                     }
                 }
             }
@@ -67375,22 +81072,22 @@ var ts;
              * Get the typing info from common package manager json files like package.json or bower.json
              */
             function getTypingNamesFromJson(jsonPath, filesToWatch) {
-                var result = ts.readConfigFile(jsonPath, function (path) { return host.readFile(path); });
-                if (result.config) {
-                    var jsonConfig = result.config;
+                if (host.fileExists(jsonPath)) {
                     filesToWatch.push(jsonPath);
-                    if (jsonConfig.dependencies) {
-                        mergeTypings(ts.getOwnKeys(jsonConfig.dependencies));
-                    }
-                    if (jsonConfig.devDependencies) {
-                        mergeTypings(ts.getOwnKeys(jsonConfig.devDependencies));
-                    }
-                    if (jsonConfig.optionalDependencies) {
-                        mergeTypings(ts.getOwnKeys(jsonConfig.optionalDependencies));
-                    }
-                    if (jsonConfig.peerDependencies) {
-                        mergeTypings(ts.getOwnKeys(jsonConfig.peerDependencies));
-                    }
+                }
+                var result = ts.readConfigFile(jsonPath, function (path) { return host.readFile(path); });
+                var jsonConfig = result.config;
+                if (jsonConfig.dependencies) {
+                    mergeTypings(ts.getOwnKeys(jsonConfig.dependencies));
+                }
+                if (jsonConfig.devDependencies) {
+                    mergeTypings(ts.getOwnKeys(jsonConfig.devDependencies));
+                }
+                if (jsonConfig.optionalDependencies) {
+                    mergeTypings(ts.getOwnKeys(jsonConfig.optionalDependencies));
+                }
+                if (jsonConfig.peerDependencies) {
+                    mergeTypings(ts.getOwnKeys(jsonConfig.peerDependencies));
                 }
             }
             /**
@@ -67404,7 +81101,7 @@ var ts;
                 var inferredTypingNames = ts.map(jsFileNames, function (f) { return ts.removeFileExtension(ts.getBaseFileName(f.toLowerCase())); });
                 var cleanedTypingNames = ts.map(inferredTypingNames, function (f) { return f.replace(/((?:\.|-)min(?=\.|$))|((?:-|\.)\d+)/g, ""); });
                 if (safeList !== EmptySafeList) {
-                    mergeTypings(ts.filter(cleanedTypingNames, function (f) { return f in safeList; }));
+                    mergeTypings(ts.mapDefined(cleanedTypingNames, function (f) { return safeList.get(f); }));
                 }
                 var hasJsxFile = ts.forEach(fileNames, function (f) { return ts.ensureScriptKind(f, ts.getScriptKindFromFileName(f)) === 2 /* JSX */; });
                 if (hasJsxFile) {
@@ -67412,31 +81109,30 @@ var ts;
                 }
             }
             /**
-             * Infer typing names from node_module folder
-             * @param nodeModulesPath is the path to the "node_modules" folder
+             * Infer typing names from packages folder (ex: node_module, bower_components)
+             * @param packagesFolderPath is the path to the packages folder
              */
-            function getTypingNamesFromNodeModuleFolder(nodeModulesPath) {
+            function getTypingNamesFromPackagesFolder(packagesFolderPath) {
+                filesToWatch.push(packagesFolderPath);
                 // Todo: add support for ModuleResolutionHost too
-                if (!host.directoryExists(nodeModulesPath)) {
+                if (!host.directoryExists(packagesFolderPath)) {
                     return;
                 }
                 var typingNames = [];
-                var fileNames = host.readDirectory(nodeModulesPath, [".json"], /*excludes*/ undefined, /*includes*/ undefined, /*depth*/ 2);
+                var fileNames = host.readDirectory(packagesFolderPath, [".json"], /*excludes*/ undefined, /*includes*/ undefined, /*depth*/ 2);
                 for (var _i = 0, fileNames_2 = fileNames; _i < fileNames_2.length; _i++) {
                     var fileName = fileNames_2[_i];
                     var normalizedFileName = ts.normalizePath(fileName);
-                    if (ts.getBaseFileName(normalizedFileName) !== "package.json") {
+                    var baseFileName = ts.getBaseFileName(normalizedFileName);
+                    if (baseFileName !== "package.json" && baseFileName !== "bower.json") {
                         continue;
                     }
                     var result = ts.readConfigFile(normalizedFileName, function (path) { return host.readFile(path); });
-                    if (!result.config) {
-                        continue;
-                    }
                     var packageJson = result.config;
                     // npm 3's package.json contains a "_requiredBy" field
                     // we should include all the top level module names for npm 2, and only module names whose
                     // "_requiredBy" field starts with "#" or equals "/" for npm 3.
-                    if (packageJson._requiredBy &&
+                    if (baseFileName === "package.json" && packageJson._requiredBy &&
                         ts.filter(packageJson._requiredBy, function (r) { return r[0] === "#" || r === "/"; }).length === 0) {
                         continue;
                     }
@@ -67447,7 +81143,7 @@ var ts;
                     }
                     if (packageJson.typings) {
                         var absolutePath = ts.getNormalizedAbsolutePath(packageJson.typings, ts.getDirectoryPath(normalizedFileName));
-                        inferredTypings[packageJson.name] = absolutePath;
+                        inferredTypings.set(packageJson.name, absolutePath);
                     }
                     else {
                         typingNames.push(packageJson.name);
@@ -67467,49 +81163,49 @@ var ts;
         function getNavigateToItems(sourceFiles, checker, cancellationToken, searchValue, maxResultCount, excludeDtsFiles) {
             var patternMatcher = ts.createPatternMatcher(searchValue);
             var rawItems = [];
-            // This means "compare in a case insensitive manner."
-            var baseSensitivity = { sensitivity: "base" };
-            // Search the declarations in all files and output matched NavigateToItem into array of NavigateToItem[]
-            ts.forEach(sourceFiles, function (sourceFile) {
+            var _loop_5 = function (sourceFile) {
                 cancellationToken.throwIfCancellationRequested();
-                if (excludeDtsFiles && ts.fileExtensionIs(sourceFile.fileName, ".d.ts")) {
-                    return;
+                if (excludeDtsFiles && ts.fileExtensionIs(sourceFile.fileName, ".d.ts" /* Dts */)) {
+                    return "continue";
                 }
-                var nameToDeclarations = sourceFile.getNamedDeclarations();
-                for (var name_52 in nameToDeclarations) {
-                    var declarations = nameToDeclarations[name_52];
+                ts.forEachEntry(sourceFile.getNamedDeclarations(), function (declarations, name) {
                     if (declarations) {
                         // First do a quick check to see if the name of the declaration matches the
                         // last portion of the (possibly) dotted name they're searching for.
-                        var matches = patternMatcher.getMatchesForLastSegmentOfPattern(name_52);
+                        var matches = patternMatcher.getMatchesForLastSegmentOfPattern(name);
                         if (!matches) {
-                            continue;
+                            return; // continue to next named declarations
                         }
-                        for (var _i = 0, declarations_9 = declarations; _i < declarations_9.length; _i++) {
-                            var declaration = declarations_9[_i];
+                        for (var _i = 0, declarations_12 = declarations; _i < declarations_12.length; _i++) {
+                            var declaration = declarations_12[_i];
                             // It was a match!  If the pattern has dots in it, then also see if the
                             // declaration container matches as well.
                             if (patternMatcher.patternContainsDots) {
                                 var containers = getContainers(declaration);
                                 if (!containers) {
-                                    return undefined;
+                                    return true; // Break out of named declarations and go to the next source file.
                                 }
-                                matches = patternMatcher.getMatches(containers, name_52);
+                                matches = patternMatcher.getMatches(containers, name);
                                 if (!matches) {
-                                    continue;
+                                    return; // continue to next named declarations
                                 }
                             }
                             var fileName = sourceFile.fileName;
                             var matchKind = bestMatchKind(matches);
-                            rawItems.push({ name: name_52, fileName: fileName, matchKind: matchKind, isCaseSensitive: allMatchesAreCaseSensitive(matches), declaration: declaration });
+                            rawItems.push({ name: name, fileName: fileName, matchKind: matchKind, isCaseSensitive: allMatchesAreCaseSensitive(matches), declaration: declaration });
                         }
                     }
-                }
-            });
+                });
+            };
+            // Search the declarations in all files and output matched NavigateToItem into array of NavigateToItem[]
+            for (var _i = 0, sourceFiles_8 = sourceFiles; _i < sourceFiles_8.length; _i++) {
+                var sourceFile = sourceFiles_8[_i];
+                _loop_5(sourceFile);
+            }
             // Remove imports when the imported declaration is already in the list and has the same name.
             rawItems = ts.filter(rawItems, function (item) {
                 var decl = item.declaration;
-                if (decl.kind === 231 /* ImportClause */ || decl.kind === 234 /* ImportSpecifier */ || decl.kind === 229 /* ImportEqualsDeclaration */) {
+                if (decl.kind === 239 /* ImportClause */ || decl.kind === 242 /* ImportSpecifier */ || decl.kind === 237 /* ImportEqualsDeclaration */) {
                     var importer = checker.getSymbolAtLocation(decl.name);
                     var imported = checker.getAliasedSymbol(importer);
                     return importer.name !== imported.name;
@@ -67537,7 +81233,7 @@ var ts;
             }
             function getTextOfIdentifierOrLiteral(node) {
                 if (node) {
-                    if (node.kind === 69 /* Identifier */ ||
+                    if (node.kind === 71 /* Identifier */ ||
                         node.kind === 9 /* StringLiteral */ ||
                         node.kind === 8 /* NumericLiteral */) {
                         return node.text;
@@ -67546,17 +81242,20 @@ var ts;
                 return undefined;
             }
             function tryAddSingleDeclarationName(declaration, containers) {
-                if (declaration && declaration.name) {
-                    var text = getTextOfIdentifierOrLiteral(declaration.name);
-                    if (text !== undefined) {
-                        containers.unshift(text);
-                    }
-                    else if (declaration.name.kind === 140 /* ComputedPropertyName */) {
-                        return tryAddComputedPropertyName(declaration.name.expression, containers, /*includeLastPortion*/ true);
-                    }
-                    else {
-                        // Don't know how to add this.
-                        return false;
+                if (declaration) {
+                    var name_67 = ts.getNameOfDeclaration(declaration);
+                    if (name_67) {
+                        var text = getTextOfIdentifierOrLiteral(name_67);
+                        if (text !== undefined) {
+                            containers.unshift(text);
+                        }
+                        else if (name_67.kind === 144 /* ComputedPropertyName */) {
+                            return tryAddComputedPropertyName(name_67.expression, containers, /*includeLastPortion*/ true);
+                        }
+                        else {
+                            // Don't know how to add this.
+                            return false;
+                        }
                     }
                 }
                 return true;
@@ -67572,7 +81271,7 @@ var ts;
                     }
                     return true;
                 }
-                if (expression.kind === 172 /* PropertyAccessExpression */) {
+                if (expression.kind === 179 /* PropertyAccessExpression */) {
                     var propertyAccess = expression;
                     if (includeLastPortion) {
                         containers.unshift(propertyAccess.name.text);
@@ -67585,8 +81284,9 @@ var ts;
                 var containers = [];
                 // First, if we started with a computed property name, then add all but the last
                 // portion into the container array.
-                if (declaration.name.kind === 140 /* ComputedPropertyName */) {
-                    if (!tryAddComputedPropertyName(declaration.name.expression, containers, /*includeLastPortion*/ false)) {
+                var name = ts.getNameOfDeclaration(declaration);
+                if (name.kind === 144 /* ComputedPropertyName */) {
+                    if (!tryAddComputedPropertyName(name.expression, containers, /*includeLastPortion*/ false)) {
                         return undefined;
                     }
                 }
@@ -67618,12 +81318,13 @@ var ts;
                 // We first sort case insensitively.  So "Aaa" will come before "bar".
                 // Then we sort case sensitively, so "aaa" will come before "Aaa".
                 return i1.matchKind - i2.matchKind ||
-                    i1.name.localeCompare(i2.name, undefined, baseSensitivity) ||
-                    i1.name.localeCompare(i2.name);
+                    ts.compareStringsCaseInsensitive(i1.name, i2.name) ||
+                    ts.compareStrings(i1.name, i2.name);
             }
             function createNavigateToItem(rawItem) {
                 var declaration = rawItem.declaration;
                 var container = ts.getContainerNode(declaration);
+                var containerName = container && ts.getNameOfDeclaration(container);
                 return {
                     name: rawItem.name,
                     kind: ts.getNodeKind(declaration),
@@ -67631,10 +81332,10 @@ var ts;
                     matchKind: ts.PatternMatchKind[rawItem.matchKind],
                     isCaseSensitive: rawItem.isCaseSensitive,
                     fileName: rawItem.fileName,
-                    textSpan: ts.createTextSpanFromBounds(declaration.getStart(), declaration.getEnd()),
+                    textSpan: ts.createTextSpanFromNode(declaration),
                     // TODO(jfreeman): What should be the containerName when the container has a computed name?
-                    containerName: container && container.name ? container.name.text : "",
-                    containerKind: container && container.name ? ts.getNodeKind(container) : ""
+                    containerName: containerName ? containerName.text : "",
+                    containerKind: containerName ? ts.getNodeKind(container) : "" /* unknown */
                 };
             }
         }
@@ -67647,15 +81348,61 @@ var ts;
 (function (ts) {
     var NavigationBar;
     (function (NavigationBar) {
-        function getNavigationBarItems(sourceFile) {
+        /**
+         * Matches all whitespace characters in a string. Eg:
+         *
+         * "app.
+         *
+         * onactivated"
+         *
+         * matches because of the newline, whereas
+         *
+         * "app.onactivated"
+         *
+         * does not match.
+         */
+        var whiteSpaceRegex = /\s+/g;
+        // Keep sourceFile handy so we don't have to search for it every time we need to call `getText`.
+        var curCancellationToken;
+        var curSourceFile;
+        /**
+         * For performance, we keep navigation bar parents on a stack rather than passing them through each recursion.
+         * `parent` is the current parent and is *not* stored in parentsStack.
+         * `startNode` sets a new parent and `endNode` returns to the previous parent.
+         */
+        var parentsStack = [];
+        var parent;
+        // NavigationBarItem requires an array, but will not mutate it, so just give it this for performance.
+        var emptyChildItemArray = [];
+        function getNavigationBarItems(sourceFile, cancellationToken) {
+            curCancellationToken = cancellationToken;
             curSourceFile = sourceFile;
-            var result = ts.map(topLevelItems(rootNavigationBarNode(sourceFile)), convertToTopLevelItem);
-            curSourceFile = undefined;
-            return result;
+            try {
+                return ts.map(topLevelItems(rootNavigationBarNode(sourceFile)), convertToTopLevelItem);
+            }
+            finally {
+                reset();
+            }
         }
         NavigationBar.getNavigationBarItems = getNavigationBarItems;
-        // Keep sourceFile handy so we don't have to search for it every time we need to call `getText`.
-        var curSourceFile;
+        function getNavigationTree(sourceFile, cancellationToken) {
+            curCancellationToken = cancellationToken;
+            curSourceFile = sourceFile;
+            try {
+                return convertToTree(rootNavigationBarNode(sourceFile));
+            }
+            finally {
+                reset();
+            }
+        }
+        NavigationBar.getNavigationTree = getNavigationTree;
+        function reset() {
+            curSourceFile = undefined;
+            curCancellationToken = undefined;
+            parentsStack = [];
+            parent = undefined;
+            emptyChildItemArray = [];
+        }
         function nodeText(node) {
             return node.getText(curSourceFile);
         }
@@ -67670,13 +81417,6 @@ var ts;
                 parent.children = [child];
             }
         }
-        /*
-        For performance, we keep navigation bar parents on a stack rather than passing them through each recursion.
-        `parent` is the current parent and is *not* stored in parentsStack.
-        `startNode` sets a new parent and `endNode` returns to the previous parent.
-        */
-        var parentsStack = [];
-        var parent;
         function rootNavigationBarNode(sourceFile) {
             ts.Debug.assert(!parentsStack.length);
             var root = { node: sourceFile, additionalNodes: undefined, parent: undefined, children: undefined, indent: 0 };
@@ -67727,11 +81467,12 @@ var ts;
         }
         /** Look for navigation bar items in node's subtree, adding them to the current `parent`. */
         function addChildrenRecursively(node) {
+            curCancellationToken.throwIfCancellationRequested();
             if (!node || ts.isToken(node)) {
                 return;
             }
             switch (node.kind) {
-                case 148 /* Constructor */:
+                case 152 /* Constructor */:
                     // Get parameter properties, and treat them as being on the *same* level as the constructor, not under it.
                     var ctr = node;
                     addNodeWithRecursiveChild(ctr, ctr.body);
@@ -67743,21 +81484,21 @@ var ts;
                         }
                     }
                     break;
-                case 147 /* MethodDeclaration */:
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                case 146 /* MethodSignature */:
+                case 151 /* MethodDeclaration */:
+                case 153 /* GetAccessor */:
+                case 154 /* SetAccessor */:
+                case 150 /* MethodSignature */:
                     if (!ts.hasDynamicName(node)) {
                         addNodeWithRecursiveChild(node, node.body);
                     }
                     break;
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
+                case 149 /* PropertyDeclaration */:
+                case 148 /* PropertySignature */:
                     if (!ts.hasDynamicName(node)) {
                         addLeafNode(node);
                     }
                     break;
-                case 231 /* ImportClause */:
+                case 239 /* ImportClause */:
                     var importClause = node;
                     // Handle default import case e.g.:
                     //    import d from "mod";
@@ -67769,7 +81510,7 @@ var ts;
                     //    import {a, b as B} from "mod";
                     var namedBindings = importClause.namedBindings;
                     if (namedBindings) {
-                        if (namedBindings.kind === 232 /* NamespaceImport */) {
+                        if (namedBindings.kind === 240 /* NamespaceImport */) {
                             addLeafNode(namedBindings);
                         }
                         else {
@@ -67780,12 +81521,12 @@ var ts;
                         }
                     }
                     break;
-                case 169 /* BindingElement */:
-                case 218 /* VariableDeclaration */:
+                case 176 /* BindingElement */:
+                case 226 /* VariableDeclaration */:
                     var decl = node;
-                    var name_53 = decl.name;
-                    if (ts.isBindingPattern(name_53)) {
-                        addChildrenRecursively(name_53);
+                    var name_68 = decl.name;
+                    if (ts.isBindingPattern(name_68)) {
+                        addChildrenRecursively(name_68);
                     }
                     else if (decl.initializer && isFunctionOrClassExpression(decl.initializer)) {
                         // For `const x = function() {}`, just use the function node, not the const.
@@ -67795,12 +81536,12 @@ var ts;
                         addNodeWithRecursiveChild(decl, decl.initializer);
                     }
                     break;
-                case 180 /* ArrowFunction */:
-                case 220 /* FunctionDeclaration */:
-                case 179 /* FunctionExpression */:
+                case 187 /* ArrowFunction */:
+                case 228 /* FunctionDeclaration */:
+                case 186 /* FunctionExpression */:
                     addNodeWithRecursiveChild(node, node.body);
                     break;
-                case 224 /* EnumDeclaration */:
+                case 232 /* EnumDeclaration */:
                     startNode(node);
                     for (var _d = 0, _e = node.members; _d < _e.length; _d++) {
                         var member = _e[_d];
@@ -67810,9 +81551,9 @@ var ts;
                     }
                     endNode();
                     break;
-                case 221 /* ClassDeclaration */:
-                case 192 /* ClassExpression */:
-                case 222 /* InterfaceDeclaration */:
+                case 229 /* ClassDeclaration */:
+                case 199 /* ClassExpression */:
+                case 230 /* InterfaceDeclaration */:
                     startNode(node);
                     for (var _f = 0, _g = node.members; _f < _g.length; _f++) {
                         var member = _g[_f];
@@ -67820,21 +81561,21 @@ var ts;
                     }
                     endNode();
                     break;
-                case 225 /* ModuleDeclaration */:
+                case 233 /* ModuleDeclaration */:
                     addNodeWithRecursiveChild(node, getInteriorModule(node).body);
                     break;
-                case 238 /* ExportSpecifier */:
-                case 229 /* ImportEqualsDeclaration */:
-                case 153 /* IndexSignature */:
-                case 151 /* CallSignature */:
-                case 152 /* ConstructSignature */:
-                case 223 /* TypeAliasDeclaration */:
+                case 246 /* ExportSpecifier */:
+                case 237 /* ImportEqualsDeclaration */:
+                case 157 /* IndexSignature */:
+                case 155 /* CallSignature */:
+                case 156 /* ConstructSignature */:
+                case 231 /* TypeAliasDeclaration */:
                     addLeafNode(node);
                     break;
                 default:
-                    ts.forEach(node.jsDocComments, function (jsDocComment) {
-                        ts.forEach(jsDocComment.tags, function (tag) {
-                            if (tag.kind === 279 /* JSDocTypedefTag */) {
+                    ts.forEach(node.jsDoc, function (jsDoc) {
+                        ts.forEach(jsDoc.tags, function (tag) {
+                            if (tag.kind === 291 /* JSDocTypedefTag */) {
                                 addLeafNode(tag);
                             }
                         });
@@ -67846,15 +81587,15 @@ var ts;
         function mergeChildren(children) {
             var nameToItems = ts.createMap();
             ts.filterMutate(children, function (child) {
-                var decl = child.node;
-                var name = decl.name && nodeText(decl.name);
+                var declName = ts.getNameOfDeclaration(child.node);
+                var name = declName && nodeText(declName);
                 if (!name) {
                     // Anonymous items are never merged.
                     return true;
                 }
-                var itemsWithSameName = nameToItems[name];
+                var itemsWithSameName = nameToItems.get(name);
                 if (!itemsWithSameName) {
-                    nameToItems[name] = child;
+                    nameToItems.set(name, child);
                     return true;
                 }
                 if (itemsWithSameName instanceof Array) {
@@ -67872,7 +81613,7 @@ var ts;
                     if (tryMerge(itemWithSameName, child)) {
                         return false;
                     }
-                    nameToItems[name] = [itemWithSameName, child];
+                    nameToItems.set(name, [itemWithSameName, child]);
                     return true;
                 }
                 function tryMerge(a, b) {
@@ -67885,14 +81626,14 @@ var ts;
             });
             /** a and b have the same name, but they may not be mergeable. */
             function shouldReallyMerge(a, b) {
-                return a.kind === b.kind && (a.kind !== 225 /* ModuleDeclaration */ || areSameModule(a, b));
+                return a.kind === b.kind && (a.kind !== 233 /* ModuleDeclaration */ || areSameModule(a, b));
                 // We use 1 NavNode to represent 'A.B.C', but there are multiple source nodes.
                 // Only merge module nodes that have the same chain. Don't merge 'A.B.C' with 'A'!
                 function areSameModule(a, b) {
                     if (a.body.kind !== b.body.kind) {
                         return false;
                     }
-                    if (a.body.kind !== 225 /* ModuleDeclaration */) {
+                    if (a.body.kind !== 233 /* ModuleDeclaration */) {
                         return true;
                     }
                     return areSameModule(a.body, b.body);
@@ -67920,63 +81661,42 @@ var ts;
         function compareChildren(child1, child2) {
             var name1 = tryGetName(child1.node), name2 = tryGetName(child2.node);
             if (name1 && name2) {
-                var cmp = localeCompareFix(name1, name2);
+                var cmp = ts.compareStringsCaseInsensitive(name1, name2);
                 return cmp !== 0 ? cmp : navigationBarNodeKind(child1) - navigationBarNodeKind(child2);
             }
             else {
                 return name1 ? 1 : name2 ? -1 : navigationBarNodeKind(child1) - navigationBarNodeKind(child2);
             }
         }
-        // More efficient to create a collator once and use its `compare` than to call `a.localeCompare(b)` many times.
-        var collator = typeof Intl === "undefined" ? undefined : new Intl.Collator();
-        // Intl is missing in Safari, and node 0.10 treats "a" as greater than "B".
-        var localeCompareIsCorrect = collator && collator.compare("a", "B") < 0;
-        var localeCompareFix = localeCompareIsCorrect ? collator.compare : function (a, b) {
-            // This isn't perfect, but it passes all of our tests.
-            for (var i = 0; i < Math.min(a.length, b.length); i++) {
-                var chA = a.charAt(i), chB = b.charAt(i);
-                if (chA === "\"" && chB === "'") {
-                    return 1;
-                }
-                if (chA === "'" && chB === "\"") {
-                    return -1;
-                }
-                var cmp = chA.toLocaleLowerCase().localeCompare(chB.toLocaleLowerCase());
-                if (cmp !== 0) {
-                    return cmp;
-                }
-            }
-            return a.length - b.length;
-        };
         /**
          * This differs from getItemName because this is just used for sorting.
          * We only sort nodes by name that have a more-or-less "direct" name, as opposed to `new()` and the like.
          * So `new()` can still come before an `aardvark` method.
          */
         function tryGetName(node) {
-            if (node.kind === 225 /* ModuleDeclaration */) {
+            if (node.kind === 233 /* ModuleDeclaration */) {
                 return getModuleName(node);
             }
-            var decl = node;
-            if (decl.name) {
-                return ts.getPropertyNameForPropertyNameNode(decl.name);
+            var declName = ts.getNameOfDeclaration(node);
+            if (declName) {
+                return ts.getPropertyNameForPropertyNameNode(declName);
             }
             switch (node.kind) {
-                case 179 /* FunctionExpression */:
-                case 180 /* ArrowFunction */:
-                case 192 /* ClassExpression */:
+                case 186 /* FunctionExpression */:
+                case 187 /* ArrowFunction */:
+                case 199 /* ClassExpression */:
                     return getFunctionOrClassName(node);
-                case 279 /* JSDocTypedefTag */:
+                case 291 /* JSDocTypedefTag */:
                     return getJSDocTypedefTagName(node);
                 default:
                     return undefined;
             }
         }
         function getItemName(node) {
-            if (node.kind === 225 /* ModuleDeclaration */) {
+            if (node.kind === 233 /* ModuleDeclaration */) {
                 return getModuleName(node);
             }
-            var name = node.name;
+            var name = ts.getNameOfDeclaration(node);
             if (name) {
                 var text = nodeText(name);
                 if (text.length > 0) {
@@ -67984,29 +81704,32 @@ var ts;
                 }
             }
             switch (node.kind) {
-                case 256 /* SourceFile */:
+                case 265 /* SourceFile */:
                     var sourceFile = node;
                     return ts.isExternalModule(sourceFile)
                         ? "\"" + ts.escapeString(ts.getBaseFileName(ts.removeFileExtension(ts.normalizePath(sourceFile.fileName)))) + "\""
                         : "<global>";
-                case 180 /* ArrowFunction */:
-                case 220 /* FunctionDeclaration */:
-                case 179 /* FunctionExpression */:
-                case 221 /* ClassDeclaration */:
-                case 192 /* ClassExpression */:
+                case 187 /* ArrowFunction */:
+                case 228 /* FunctionDeclaration */:
+                case 186 /* FunctionExpression */:
+                case 229 /* ClassDeclaration */:
+                case 199 /* ClassExpression */:
                     if (ts.getModifierFlags(node) & 512 /* Default */) {
                         return "default";
                     }
+                    // We may get a string with newlines or other whitespace in the case of an object dereference
+                    // (eg: "app\n.onactivated"), so we should remove the whitespace for readabiltiy in the
+                    // navigation bar.
                     return getFunctionOrClassName(node);
-                case 148 /* Constructor */:
+                case 152 /* Constructor */:
                     return "constructor";
-                case 152 /* ConstructSignature */:
+                case 156 /* ConstructSignature */:
                     return "new()";
-                case 151 /* CallSignature */:
+                case 155 /* CallSignature */:
                     return "()";
-                case 153 /* IndexSignature */:
+                case 157 /* IndexSignature */:
                     return "[]";
-                case 279 /* JSDocTypedefTag */:
+                case 291 /* JSDocTypedefTag */:
                     return getJSDocTypedefTagName(node);
                 default:
                     return "<unknown>";
@@ -68018,10 +81741,10 @@ var ts;
             }
             else {
                 var parentNode = node.parent && node.parent.parent;
-                if (parentNode && parentNode.kind === 200 /* VariableStatement */) {
+                if (parentNode && parentNode.kind === 208 /* VariableStatement */) {
                     if (parentNode.declarationList.declarations.length > 0) {
                         var nameIdentifier = parentNode.declarationList.declarations[0].name;
-                        if (nameIdentifier.kind === 69 /* Identifier */) {
+                        if (nameIdentifier.kind === 71 /* Identifier */) {
                             return nameIdentifier.text;
                         }
                     }
@@ -68047,24 +81770,24 @@ var ts;
             return topLevel;
             function isTopLevel(item) {
                 switch (navigationBarNodeKind(item)) {
-                    case 221 /* ClassDeclaration */:
-                    case 192 /* ClassExpression */:
-                    case 224 /* EnumDeclaration */:
-                    case 222 /* InterfaceDeclaration */:
-                    case 225 /* ModuleDeclaration */:
-                    case 256 /* SourceFile */:
-                    case 223 /* TypeAliasDeclaration */:
-                    case 279 /* JSDocTypedefTag */:
+                    case 229 /* ClassDeclaration */:
+                    case 199 /* ClassExpression */:
+                    case 232 /* EnumDeclaration */:
+                    case 230 /* InterfaceDeclaration */:
+                    case 233 /* ModuleDeclaration */:
+                    case 265 /* SourceFile */:
+                    case 231 /* TypeAliasDeclaration */:
+                    case 291 /* JSDocTypedefTag */:
                         return true;
-                    case 148 /* Constructor */:
-                    case 147 /* MethodDeclaration */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                    case 218 /* VariableDeclaration */:
+                    case 152 /* Constructor */:
+                    case 151 /* MethodDeclaration */:
+                    case 153 /* GetAccessor */:
+                    case 154 /* SetAccessor */:
+                    case 226 /* VariableDeclaration */:
                         return hasSomeImportantChild(item);
-                    case 180 /* ArrowFunction */:
-                    case 220 /* FunctionDeclaration */:
-                    case 179 /* FunctionExpression */:
+                    case 187 /* ArrowFunction */:
+                    case 228 /* FunctionDeclaration */:
+                    case 186 /* FunctionExpression */:
                         return isTopLevelFunctionDeclaration(item);
                     default:
                         return false;
@@ -68074,10 +81797,10 @@ var ts;
                         return false;
                     }
                     switch (navigationBarNodeKind(item.parent)) {
-                        case 226 /* ModuleBlock */:
-                        case 256 /* SourceFile */:
-                        case 147 /* MethodDeclaration */:
-                        case 148 /* Constructor */:
+                        case 234 /* ModuleBlock */:
+                        case 265 /* SourceFile */:
+                        case 151 /* MethodDeclaration */:
+                        case 152 /* Constructor */:
                             return true;
                         default:
                             return hasSomeImportantChild(item);
@@ -68086,18 +81809,25 @@ var ts;
                 function hasSomeImportantChild(item) {
                     return ts.forEach(item.children, function (child) {
                         var childKind = navigationBarNodeKind(child);
-                        return childKind !== 218 /* VariableDeclaration */ && childKind !== 169 /* BindingElement */;
+                        return childKind !== 226 /* VariableDeclaration */ && childKind !== 176 /* BindingElement */;
                     });
                 }
             }
         }
-        // NavigationBarItem requires an array, but will not mutate it, so just give it this for performance.
-        var emptyChildItemArray = [];
+        function convertToTree(n) {
+            return {
+                text: getItemName(n.node),
+                kind: ts.getNodeKind(n.node),
+                kindModifiers: getModifiers(n.node),
+                spans: getSpans(n),
+                childItems: ts.map(n.children, convertToTree)
+            };
+        }
         function convertToTopLevelItem(n) {
             return {
                 text: getItemName(n.node),
                 kind: ts.getNodeKind(n.node),
-                kindModifiers: ts.getNodeModifiers(n.node),
+                kindModifiers: getModifiers(n.node),
                 spans: getSpans(n),
                 childItems: ts.map(n.children, convertToChildItem) || emptyChildItemArray,
                 indent: n.indent,
@@ -68116,16 +81846,16 @@ var ts;
                     grayed: false
                 };
             }
-            function getSpans(n) {
-                var spans = [getNodeSpan(n.node)];
-                if (n.additionalNodes) {
-                    for (var _i = 0, _a = n.additionalNodes; _i < _a.length; _i++) {
-                        var node = _a[_i];
-                        spans.push(getNodeSpan(node));
-                    }
+        }
+        function getSpans(n) {
+            var spans = [getNodeSpan(n.node)];
+            if (n.additionalNodes) {
+                for (var _i = 0, _a = n.additionalNodes; _i < _a.length; _i++) {
+                    var node = _a[_i];
+                    spans.push(getNodeSpan(node));
                 }
-                return spans;
             }
+            return spans;
         }
         function getModuleName(moduleDeclaration) {
             // We want to maintain quotation marks.
@@ -68135,7 +81865,7 @@ var ts;
             // Otherwise, we need to aggregate each identifier to build up the qualified name.
             var result = [];
             result.push(moduleDeclaration.name.text);
-            while (moduleDeclaration.body && moduleDeclaration.body.kind === 225 /* ModuleDeclaration */) {
+            while (moduleDeclaration.body && moduleDeclaration.body.kind === 233 /* ModuleDeclaration */) {
                 moduleDeclaration = moduleDeclaration.body;
                 result.push(moduleDeclaration.name.text);
             }
@@ -68146,28 +81876,34 @@ var ts;
          * We store 'A' as associated with a NavNode, and use getModuleName to traverse down again.
          */
         function getInteriorModule(decl) {
-            return decl.body.kind === 225 /* ModuleDeclaration */ ? getInteriorModule(decl.body) : decl;
+            return decl.body.kind === 233 /* ModuleDeclaration */ ? getInteriorModule(decl.body) : decl;
         }
         function isComputedProperty(member) {
-            return !member.name || member.name.kind === 140 /* ComputedPropertyName */;
+            return !member.name || member.name.kind === 144 /* ComputedPropertyName */;
         }
         function getNodeSpan(node) {
-            return node.kind === 256 /* SourceFile */
+            return node.kind === 265 /* SourceFile */
                 ? ts.createTextSpanFromBounds(node.getFullStart(), node.getEnd())
-                : ts.createTextSpanFromBounds(node.getStart(curSourceFile), node.getEnd());
+                : ts.createTextSpanFromNode(node, curSourceFile);
+        }
+        function getModifiers(node) {
+            if (node.parent && node.parent.kind === 226 /* VariableDeclaration */) {
+                node = node.parent;
+            }
+            return ts.getNodeModifiers(node);
         }
         function getFunctionOrClassName(node) {
             if (node.name && ts.getFullWidth(node.name) > 0) {
                 return ts.declarationNameToString(node.name);
             }
-            else if (node.parent.kind === 218 /* VariableDeclaration */) {
+            else if (node.parent.kind === 226 /* VariableDeclaration */) {
                 return ts.declarationNameToString(node.parent.name);
             }
-            else if (node.parent.kind === 187 /* BinaryExpression */ &&
-                node.parent.operatorToken.kind === 56 /* EqualsToken */) {
-                return nodeText(node.parent.left);
+            else if (node.parent.kind === 194 /* BinaryExpression */ &&
+                node.parent.operatorToken.kind === 58 /* EqualsToken */) {
+                return nodeText(node.parent.left).replace(whiteSpaceRegex, "");
             }
-            else if (node.parent.kind === 253 /* PropertyAssignment */ && node.parent.name) {
+            else if (node.parent.kind === 261 /* PropertyAssignment */ && node.parent.name) {
                 return nodeText(node.parent.name);
             }
             else if (ts.getModifierFlags(node) & 512 /* Default */) {
@@ -68178,7 +81914,7 @@ var ts;
             }
         }
         function isFunctionOrClassExpression(node) {
-            return node.kind === 179 /* FunctionExpression */ || node.kind === 180 /* ArrowFunction */ || node.kind === 192 /* ClassExpression */;
+            return node.kind === 186 /* FunctionExpression */ || node.kind === 187 /* ArrowFunction */ || node.kind === 199 /* ClassExpression */;
         }
     })(NavigationBar = ts.NavigationBar || (ts.NavigationBar = {}));
 })(ts || (ts = {}));
@@ -68187,29 +81923,29 @@ var ts;
 (function (ts) {
     var OutliningElementsCollector;
     (function (OutliningElementsCollector) {
-        function collectElements(sourceFile) {
+        function collectElements(sourceFile, cancellationToken) {
             var elements = [];
             var collapseText = "...";
             function addOutliningSpan(hintSpanNode, startElement, endElement, autoCollapse) {
                 if (hintSpanNode && startElement && endElement) {
-                    var span_12 = {
+                    var span_13 = {
                         textSpan: ts.createTextSpanFromBounds(startElement.pos, endElement.end),
-                        hintSpan: ts.createTextSpanFromBounds(hintSpanNode.getStart(), hintSpanNode.end),
+                        hintSpan: ts.createTextSpanFromNode(hintSpanNode, sourceFile),
                         bannerText: collapseText,
                         autoCollapse: autoCollapse
                     };
-                    elements.push(span_12);
+                    elements.push(span_13);
                 }
             }
             function addOutliningSpanComments(commentSpan, autoCollapse) {
                 if (commentSpan) {
-                    var span_13 = {
+                    var span_14 = {
                         textSpan: ts.createTextSpanFromBounds(commentSpan.pos, commentSpan.end),
                         hintSpan: ts.createTextSpanFromBounds(commentSpan.pos, commentSpan.end),
                         bannerText: collapseText,
                         autoCollapse: autoCollapse
                     };
-                    elements.push(span_13);
+                    elements.push(span_14);
                 }
             }
             function addOutliningForLeadingCommentsForNode(n) {
@@ -68221,6 +81957,7 @@ var ts;
                     var singleLineCommentCount = 0;
                     for (var _i = 0, comments_4 = comments; _i < comments_4.length; _i++) {
                         var currentComment = comments_4[_i];
+                        cancellationToken.throwIfCancellationRequested();
                         // For single line comments, combine consecutive ones (2 or more) into
                         // a single span from the start of the first till the end of the last
                         if (currentComment.kind === 2 /* SingleLineCommentTrivia */) {
@@ -68246,19 +81983,20 @@ var ts;
                 // Only outline spans of two or more consecutive single line comments
                 if (count > 1) {
                     var multipleSingleLineComments = {
+                        kind: 2 /* SingleLineCommentTrivia */,
                         pos: start,
                         end: end,
-                        kind: 2 /* SingleLineCommentTrivia */
                     };
                     addOutliningSpanComments(multipleSingleLineComments, /*autoCollapse*/ false);
                 }
             }
             function autoCollapse(node) {
-                return ts.isFunctionBlock(node) && node.parent.kind !== 180 /* ArrowFunction */;
+                return ts.isFunctionBlock(node) && node.parent.kind !== 187 /* ArrowFunction */;
             }
             var depth = 0;
             var maxDepth = 20;
             function walk(n) {
+                cancellationToken.throwIfCancellationRequested();
                 if (depth > maxDepth) {
                     return;
                 }
@@ -68266,71 +82004,72 @@ var ts;
                     addOutliningForLeadingCommentsForNode(n);
                 }
                 switch (n.kind) {
-                    case 199 /* Block */:
+                    case 207 /* Block */:
                         if (!ts.isFunctionBlock(n)) {
-                            var parent_22 = n.parent;
-                            var openBrace = ts.findChildOfKind(n, 15 /* OpenBraceToken */, sourceFile);
-                            var closeBrace = ts.findChildOfKind(n, 16 /* CloseBraceToken */, sourceFile);
+                            var parent_24 = n.parent;
+                            var openBrace = ts.findChildOfKind(n, 17 /* OpenBraceToken */, sourceFile);
+                            var closeBrace = ts.findChildOfKind(n, 18 /* CloseBraceToken */, sourceFile);
                             // Check if the block is standalone, or 'attached' to some parent statement.
                             // If the latter, we want to collapse the block, but consider its hint span
                             // to be the entire span of the parent.
-                            if (parent_22.kind === 204 /* DoStatement */ ||
-                                parent_22.kind === 207 /* ForInStatement */ ||
-                                parent_22.kind === 208 /* ForOfStatement */ ||
-                                parent_22.kind === 206 /* ForStatement */ ||
-                                parent_22.kind === 203 /* IfStatement */ ||
-                                parent_22.kind === 205 /* WhileStatement */ ||
-                                parent_22.kind === 212 /* WithStatement */ ||
-                                parent_22.kind === 252 /* CatchClause */) {
-                                addOutliningSpan(parent_22, openBrace, closeBrace, autoCollapse(n));
+                            if (parent_24.kind === 212 /* DoStatement */ ||
+                                parent_24.kind === 215 /* ForInStatement */ ||
+                                parent_24.kind === 216 /* ForOfStatement */ ||
+                                parent_24.kind === 214 /* ForStatement */ ||
+                                parent_24.kind === 211 /* IfStatement */ ||
+                                parent_24.kind === 213 /* WhileStatement */ ||
+                                parent_24.kind === 220 /* WithStatement */ ||
+                                parent_24.kind === 260 /* CatchClause */) {
+                                addOutliningSpan(parent_24, openBrace, closeBrace, autoCollapse(n));
                                 break;
                             }
-                            if (parent_22.kind === 216 /* TryStatement */) {
+                            if (parent_24.kind === 224 /* TryStatement */) {
                                 // Could be the try-block, or the finally-block.
-                                var tryStatement = parent_22;
+                                var tryStatement = parent_24;
                                 if (tryStatement.tryBlock === n) {
-                                    addOutliningSpan(parent_22, openBrace, closeBrace, autoCollapse(n));
+                                    addOutliningSpan(parent_24, openBrace, closeBrace, autoCollapse(n));
                                     break;
                                 }
                                 else if (tryStatement.finallyBlock === n) {
-                                    var finallyKeyword = ts.findChildOfKind(tryStatement, 85 /* FinallyKeyword */, sourceFile);
+                                    var finallyKeyword = ts.findChildOfKind(tryStatement, 87 /* FinallyKeyword */, sourceFile);
                                     if (finallyKeyword) {
                                         addOutliningSpan(finallyKeyword, openBrace, closeBrace, autoCollapse(n));
                                         break;
                                     }
                                 }
+                                // fall through.
                             }
                             // Block was a standalone block.  In this case we want to only collapse
                             // the span of the block, independent of any parent span.
-                            var span_14 = ts.createTextSpanFromBounds(n.getStart(), n.end);
+                            var span_15 = ts.createTextSpanFromNode(n);
                             elements.push({
-                                textSpan: span_14,
-                                hintSpan: span_14,
+                                textSpan: span_15,
+                                hintSpan: span_15,
                                 bannerText: collapseText,
                                 autoCollapse: autoCollapse(n)
                             });
                             break;
                         }
-                    // Fallthrough.
-                    case 226 /* ModuleBlock */: {
-                        var openBrace = ts.findChildOfKind(n, 15 /* OpenBraceToken */, sourceFile);
-                        var closeBrace = ts.findChildOfKind(n, 16 /* CloseBraceToken */, sourceFile);
+                    // falls through
+                    case 234 /* ModuleBlock */: {
+                        var openBrace = ts.findChildOfKind(n, 17 /* OpenBraceToken */, sourceFile);
+                        var closeBrace = ts.findChildOfKind(n, 18 /* CloseBraceToken */, sourceFile);
                         addOutliningSpan(n.parent, openBrace, closeBrace, autoCollapse(n));
                         break;
                     }
-                    case 221 /* ClassDeclaration */:
-                    case 222 /* InterfaceDeclaration */:
-                    case 224 /* EnumDeclaration */:
-                    case 171 /* ObjectLiteralExpression */:
-                    case 227 /* CaseBlock */: {
-                        var openBrace = ts.findChildOfKind(n, 15 /* OpenBraceToken */, sourceFile);
-                        var closeBrace = ts.findChildOfKind(n, 16 /* CloseBraceToken */, sourceFile);
+                    case 229 /* ClassDeclaration */:
+                    case 230 /* InterfaceDeclaration */:
+                    case 232 /* EnumDeclaration */:
+                    case 178 /* ObjectLiteralExpression */:
+                    case 235 /* CaseBlock */: {
+                        var openBrace = ts.findChildOfKind(n, 17 /* OpenBraceToken */, sourceFile);
+                        var closeBrace = ts.findChildOfKind(n, 18 /* CloseBraceToken */, sourceFile);
                         addOutliningSpan(n, openBrace, closeBrace, autoCollapse(n));
                         break;
                     }
-                    case 170 /* ArrayLiteralExpression */:
-                        var openBracket = ts.findChildOfKind(n, 19 /* OpenBracketToken */, sourceFile);
-                        var closeBracket = ts.findChildOfKind(n, 20 /* CloseBracketToken */, sourceFile);
+                    case 177 /* ArrayLiteralExpression */:
+                        var openBracket = ts.findChildOfKind(n, 21 /* OpenBracketToken */, sourceFile);
+                        var closeBracket = ts.findChildOfKind(n, 22 /* CloseBracketToken */, sourceFile);
                         addOutliningSpan(n, openBracket, closeBracket, autoCollapse(n));
                         break;
                 }
@@ -68348,13 +82087,13 @@ var ts;
 var ts;
 (function (ts) {
     // Note(cyrusn): this enum is ordered from strongest match type to weakest match type.
+    var PatternMatchKind;
     (function (PatternMatchKind) {
         PatternMatchKind[PatternMatchKind["exact"] = 0] = "exact";
         PatternMatchKind[PatternMatchKind["prefix"] = 1] = "prefix";
         PatternMatchKind[PatternMatchKind["substring"] = 2] = "substring";
         PatternMatchKind[PatternMatchKind["camelCase"] = 3] = "camelCase";
-    })(ts.PatternMatchKind || (ts.PatternMatchKind = {}));
-    var PatternMatchKind = ts.PatternMatchKind;
+    })(PatternMatchKind = ts.PatternMatchKind || (ts.PatternMatchKind = {}));
     function createPatternMatch(kind, punctuationStripped, isCaseSensitive, camelCaseWeight) {
         return {
             kind: kind,
@@ -68424,10 +82163,11 @@ var ts;
             return totalMatch;
         }
         function getWordSpans(word) {
-            if (!(word in stringToWordSpans)) {
-                stringToWordSpans[word] = breakIntoWordSpans(word);
+            var spans = stringToWordSpans.get(word);
+            if (!spans) {
+                stringToWordSpans.set(word, spans = breakIntoWordSpans(word));
             }
-            return stringToWordSpans[word];
+            return spans;
         }
         function matchTextChunk(candidate, chunk, punctuationStripped) {
             var index = indexOfIgnoringCase(candidate, chunk.textLowerCase);
@@ -68455,10 +82195,10 @@ var ts;
                     //    But we would match 'FooAttribute' (since 'Attribute' starts with 'a').
                     var wordSpans = getWordSpans(candidate);
                     for (var _i = 0, wordSpans_1 = wordSpans; _i < wordSpans_1.length; _i++) {
-                        var span_15 = wordSpans_1[_i];
-                        if (partStartsWith(candidate, span_15, chunk.text, /*ignoreCase:*/ true)) {
+                        var span_16 = wordSpans_1[_i];
+                        if (partStartsWith(candidate, span_16, chunk.text, /*ignoreCase:*/ true)) {
                             return createPatternMatch(PatternMatchKind.substring, punctuationStripped, 
-                            /*isCaseSensitive:*/ partStartsWith(candidate, span_15, chunk.text, /*ignoreCase:*/ false));
+                            /*isCaseSensitive:*/ partStartsWith(candidate, span_16, chunk.text, /*ignoreCase:*/ false));
                         }
                     }
                 }
@@ -68685,7 +82425,7 @@ var ts;
         if (ch >= 65 /* A */ && ch <= 90 /* Z */) {
             return true;
         }
-        if (ch < 127 /* maxAsciiCharacter */ || !ts.isUnicodeIdentifierStart(ch, 2 /* Latest */)) {
+        if (ch < 127 /* maxAsciiCharacter */ || !ts.isUnicodeIdentifierStart(ch, 5 /* Latest */)) {
             return false;
         }
         // TODO: find a way to determine this for any unicode characters in a
@@ -68698,7 +82438,7 @@ var ts;
         if (ch >= 97 /* a */ && ch <= 122 /* z */) {
             return true;
         }
-        if (ch < 127 /* maxAsciiCharacter */ || !ts.isUnicodeIdentifierStart(ch, 2 /* Latest */)) {
+        if (ch < 127 /* maxAsciiCharacter */ || !ts.isUnicodeIdentifierStart(ch, 5 /* Latest */)) {
             return false;
         }
         // TODO: find a way to determine this for any unicode characters in a
@@ -68708,7 +82448,8 @@ var ts;
     }
     // Assumes 'value' is already lowercase.
     function indexOfIgnoringCase(string, value) {
-        for (var i = 0, n = string.length - value.length; i <= n; i++) {
+        var n = string.length - value.length;
+        for (var i = 0; i <= n; i++) {
             if (startsWithIgnoringCase(string, value, i)) {
                 return i;
             }
@@ -68717,7 +82458,7 @@ var ts;
     }
     // Assumes 'value' is already lowercase.
     function startsWithIgnoringCase(string, value, start) {
-        for (var i = 0, n = value.length; i < n; i++) {
+        for (var i = 0; i < value.length; i++) {
             var ch1 = toLowerCase(string.charCodeAt(i + start));
             var ch2 = value.charCodeAt(i);
             if (ch1 !== ch2) {
@@ -68789,7 +82530,7 @@ var ts;
     function breakIntoSpans(identifier, word) {
         var result = [];
         var wordStart = 0;
-        for (var i = 1, n = identifier.length; i < n; i++) {
+        for (var i = 1; i < identifier.length; i++) {
             var lastIsDigit = isDigit(identifier.charCodeAt(i - 1));
             var currentIsDigit = isDigit(identifier.charCodeAt(i));
             var hasTransitionFromLowerToUpper = transitionFromLowerToUpper(identifier, word, i);
@@ -68919,10 +82660,10 @@ var ts;
         var externalModule = false;
         function nextToken() {
             var token = ts.scanner.scan();
-            if (token === 15 /* OpenBraceToken */) {
+            if (token === 17 /* OpenBraceToken */) {
                 braceNesting++;
             }
-            else if (token === 16 /* CloseBraceToken */) {
+            else if (token === 18 /* CloseBraceToken */) {
                 braceNesting--;
             }
             return token;
@@ -68973,10 +82714,10 @@ var ts;
          */
         function tryConsumeDeclare() {
             var token = ts.scanner.getToken();
-            if (token === 122 /* DeclareKeyword */) {
+            if (token === 124 /* DeclareKeyword */) {
                 // declare module "mod"
                 token = nextToken();
-                if (token === 125 /* ModuleKeyword */) {
+                if (token === 128 /* ModuleKeyword */) {
                     token = nextToken();
                     if (token === 9 /* StringLiteral */) {
                         recordAmbientExternalModule();
@@ -68991,17 +82732,25 @@ var ts;
          */
         function tryConsumeImport() {
             var token = ts.scanner.getToken();
-            if (token === 89 /* ImportKeyword */) {
+            if (token === 91 /* ImportKeyword */) {
                 token = nextToken();
-                if (token === 9 /* StringLiteral */) {
+                if (token === 19 /* OpenParenToken */) {
+                    token = nextToken();
+                    if (token === 9 /* StringLiteral */) {
+                        // import("mod");
+                        recordModuleName();
+                        return true;
+                    }
+                }
+                else if (token === 9 /* StringLiteral */) {
                     // import "mod";
                     recordModuleName();
                     return true;
                 }
                 else {
-                    if (token === 69 /* Identifier */ || ts.isKeyword(token)) {
+                    if (token === 71 /* Identifier */ || ts.isKeyword(token)) {
                         token = nextToken();
-                        if (token === 136 /* FromKeyword */) {
+                        if (token === 140 /* FromKeyword */) {
                             token = nextToken();
                             if (token === 9 /* StringLiteral */) {
                                 // import d from "mod";
@@ -69009,12 +82758,12 @@ var ts;
                                 return true;
                             }
                         }
-                        else if (token === 56 /* EqualsToken */) {
+                        else if (token === 58 /* EqualsToken */) {
                             if (tryConsumeRequireCall(/*skipCurrentToken*/ true)) {
                                 return true;
                             }
                         }
-                        else if (token === 24 /* CommaToken */) {
+                        else if (token === 26 /* CommaToken */) {
                             // consume comma and keep going
                             token = nextToken();
                         }
@@ -69023,16 +82772,16 @@ var ts;
                             return true;
                         }
                     }
-                    if (token === 15 /* OpenBraceToken */) {
+                    if (token === 17 /* OpenBraceToken */) {
                         token = nextToken();
                         // consume "{ a as B, c, d as D}" clauses
                         // make sure that it stops on EOF
-                        while (token !== 16 /* CloseBraceToken */ && token !== 1 /* EndOfFileToken */) {
+                        while (token !== 18 /* CloseBraceToken */ && token !== 1 /* EndOfFileToken */) {
                             token = nextToken();
                         }
-                        if (token === 16 /* CloseBraceToken */) {
+                        if (token === 18 /* CloseBraceToken */) {
                             token = nextToken();
-                            if (token === 136 /* FromKeyword */) {
+                            if (token === 140 /* FromKeyword */) {
                                 token = nextToken();
                                 if (token === 9 /* StringLiteral */) {
                                     // import {a as A} from "mod";
@@ -69042,13 +82791,13 @@ var ts;
                             }
                         }
                     }
-                    else if (token === 37 /* AsteriskToken */) {
+                    else if (token === 39 /* AsteriskToken */) {
                         token = nextToken();
-                        if (token === 116 /* AsKeyword */) {
+                        if (token === 118 /* AsKeyword */) {
                             token = nextToken();
-                            if (token === 69 /* Identifier */ || ts.isKeyword(token)) {
+                            if (token === 71 /* Identifier */ || ts.isKeyword(token)) {
                                 token = nextToken();
-                                if (token === 136 /* FromKeyword */) {
+                                if (token === 140 /* FromKeyword */) {
                                     token = nextToken();
                                     if (token === 9 /* StringLiteral */) {
                                         // import * as NS from "mod"
@@ -69066,19 +82815,19 @@ var ts;
         }
         function tryConsumeExport() {
             var token = ts.scanner.getToken();
-            if (token === 82 /* ExportKeyword */) {
+            if (token === 84 /* ExportKeyword */) {
                 markAsExternalModuleIfTopLevel();
                 token = nextToken();
-                if (token === 15 /* OpenBraceToken */) {
+                if (token === 17 /* OpenBraceToken */) {
                     token = nextToken();
                     // consume "{ a as B, c, d as D}" clauses
                     // make sure it stops on EOF
-                    while (token !== 16 /* CloseBraceToken */ && token !== 1 /* EndOfFileToken */) {
+                    while (token !== 18 /* CloseBraceToken */ && token !== 1 /* EndOfFileToken */) {
                         token = nextToken();
                     }
-                    if (token === 16 /* CloseBraceToken */) {
+                    if (token === 18 /* CloseBraceToken */) {
                         token = nextToken();
-                        if (token === 136 /* FromKeyword */) {
+                        if (token === 140 /* FromKeyword */) {
                             token = nextToken();
                             if (token === 9 /* StringLiteral */) {
                                 // export {a as A} from "mod";
@@ -69088,9 +82837,9 @@ var ts;
                         }
                     }
                 }
-                else if (token === 37 /* AsteriskToken */) {
+                else if (token === 39 /* AsteriskToken */) {
                     token = nextToken();
-                    if (token === 136 /* FromKeyword */) {
+                    if (token === 140 /* FromKeyword */) {
                         token = nextToken();
                         if (token === 9 /* StringLiteral */) {
                             // export * from "mod"
@@ -69098,11 +82847,11 @@ var ts;
                         }
                     }
                 }
-                else if (token === 89 /* ImportKeyword */) {
+                else if (token === 91 /* ImportKeyword */) {
                     token = nextToken();
-                    if (token === 69 /* Identifier */ || ts.isKeyword(token)) {
+                    if (token === 71 /* Identifier */ || ts.isKeyword(token)) {
                         token = nextToken();
-                        if (token === 56 /* EqualsToken */) {
+                        if (token === 58 /* EqualsToken */) {
                             if (tryConsumeRequireCall(/*skipCurrentToken*/ true)) {
                                 return true;
                             }
@@ -69115,9 +82864,9 @@ var ts;
         }
         function tryConsumeRequireCall(skipCurrentToken) {
             var token = skipCurrentToken ? nextToken() : ts.scanner.getToken();
-            if (token === 129 /* RequireKeyword */) {
+            if (token === 132 /* RequireKeyword */) {
                 token = nextToken();
-                if (token === 17 /* OpenParenToken */) {
+                if (token === 19 /* OpenParenToken */) {
                     token = nextToken();
                     if (token === 9 /* StringLiteral */) {
                         //  require("mod");
@@ -69130,16 +82879,16 @@ var ts;
         }
         function tryConsumeDefine() {
             var token = ts.scanner.getToken();
-            if (token === 69 /* Identifier */ && ts.scanner.getTokenValue() === "define") {
+            if (token === 71 /* Identifier */ && ts.scanner.getTokenValue() === "define") {
                 token = nextToken();
-                if (token !== 17 /* OpenParenToken */) {
+                if (token !== 19 /* OpenParenToken */) {
                     return true;
                 }
                 token = nextToken();
                 if (token === 9 /* StringLiteral */) {
                     // looks like define ("modname", ... - skip string literal and comma
                     token = nextToken();
-                    if (token === 24 /* CommaToken */) {
+                    if (token === 26 /* CommaToken */) {
                         token = nextToken();
                     }
                     else {
@@ -69148,14 +82897,14 @@ var ts;
                     }
                 }
                 // should be start of dependency list
-                if (token !== 19 /* OpenBracketToken */) {
+                if (token !== 21 /* OpenBracketToken */) {
                     return true;
                 }
                 // skip open bracket
                 token = nextToken();
                 var i = 0;
                 // scan until ']' or EOF
-                while (token !== 20 /* CloseBracketToken */ && token !== 1 /* EndOfFileToken */) {
+                while (token !== 22 /* CloseBracketToken */ && token !== 1 /* EndOfFileToken */) {
                     // record string literals as module names
                     if (token === 9 /* StringLiteral */) {
                         recordModuleName();
@@ -69177,7 +82926,7 @@ var ts;
             //    import * as NS  from "mod"
             //    import d, {a, b as B} from "mod"
             //    import i = require("mod");
-            //
+            //    import("mod");
             //    export * from "mod"
             //    export {a as b} from "mod"
             //    export import i = require("mod")
@@ -69242,93 +82991,89 @@ var ts;
     var Rename;
     (function (Rename) {
         function getRenameInfo(typeChecker, defaultLibFileName, getCanonicalFileName, sourceFile, position) {
-            var canonicalDefaultLibName = getCanonicalFileName(ts.normalizePath(defaultLibFileName));
+            var getCanonicalDefaultLibName = ts.memoize(function () { return getCanonicalFileName(ts.normalizePath(defaultLibFileName)); });
             var node = ts.getTouchingWord(sourceFile, position, /*includeJsDocComment*/ true);
-            if (node) {
-                if (node.kind === 69 /* Identifier */ ||
-                    node.kind === 9 /* StringLiteral */ ||
-                    ts.isLiteralNameOfPropertyDeclarationOrIndexAccess(node) ||
-                    ts.isThis(node)) {
-                    var symbol = typeChecker.getSymbolAtLocation(node);
-                    // Only allow a symbol to be renamed if it actually has at least one declaration.
-                    if (symbol) {
-                        var declarations = symbol.getDeclarations();
-                        if (declarations && declarations.length > 0) {
-                            // Disallow rename for elements that are defined in the standard TypeScript library.
-                            if (ts.forEach(declarations, isDefinedInLibraryFile)) {
-                                return getRenameInfoError(ts.getLocaleSpecificMessage(ts.Diagnostics.You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library));
-                            }
-                            var displayName = ts.stripQuotes(ts.getDeclaredName(typeChecker, symbol, node));
-                            var kind = ts.SymbolDisplay.getSymbolKind(typeChecker, symbol, node);
-                            if (kind) {
-                                return {
-                                    canRename: true,
-                                    kind: kind,
-                                    displayName: displayName,
-                                    localizedErrorMessage: undefined,
-                                    fullDisplayName: typeChecker.getFullyQualifiedName(symbol),
-                                    kindModifiers: ts.SymbolDisplay.getSymbolModifiers(symbol),
-                                    triggerSpan: createTriggerSpanForNode(node, sourceFile)
-                                };
-                            }
-                        }
-                    }
-                    else if (node.kind === 9 /* StringLiteral */) {
-                        var type = ts.getStringLiteralTypeForNode(node, typeChecker);
-                        if (type) {
-                            if (isDefinedInLibraryFile(node)) {
-                                return getRenameInfoError(ts.getLocaleSpecificMessage(ts.Diagnostics.You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library));
-                            }
-                            else {
-                                var displayName = ts.stripQuotes(type.text);
-                                return {
-                                    canRename: true,
-                                    kind: ts.ScriptElementKind.variableElement,
-                                    displayName: displayName,
-                                    localizedErrorMessage: undefined,
-                                    fullDisplayName: displayName,
-                                    kindModifiers: ts.ScriptElementKindModifier.none,
-                                    triggerSpan: createTriggerSpanForNode(node, sourceFile)
-                                };
-                            }
-                        }
-                    }
+            var renameInfo = node && nodeIsEligibleForRename(node)
+                ? getRenameInfoForNode(node, typeChecker, sourceFile, isDefinedInLibraryFile)
+                : undefined;
+            return renameInfo || getRenameInfoError(ts.Diagnostics.You_cannot_rename_this_element);
+            function isDefinedInLibraryFile(declaration) {
+                if (!defaultLibFileName) {
+                    return false;
                 }
+                var sourceFile = declaration.getSourceFile();
+                var canonicalName = getCanonicalFileName(ts.normalizePath(sourceFile.fileName));
+                return canonicalName === getCanonicalDefaultLibName();
             }
-            return getRenameInfoError(ts.getLocaleSpecificMessage(ts.Diagnostics.You_cannot_rename_this_element));
-            function getRenameInfoError(localizedErrorMessage) {
-                return {
-                    canRename: false,
-                    localizedErrorMessage: localizedErrorMessage,
-                    displayName: undefined,
-                    fullDisplayName: undefined,
-                    kind: undefined,
-                    kindModifiers: undefined,
-                    triggerSpan: undefined
-                };
-            }
-            function isDefinedInLibraryFile(declaration) {
-                if (defaultLibFileName) {
-                    var sourceFile_2 = declaration.getSourceFile();
-                    var canonicalName = getCanonicalFileName(ts.normalizePath(sourceFile_2.fileName));
-                    if (canonicalName === canonicalDefaultLibName) {
-                        return true;
+        }
+        Rename.getRenameInfo = getRenameInfo;
+        function getRenameInfoForNode(node, typeChecker, sourceFile, isDefinedInLibraryFile) {
+            var symbol = typeChecker.getSymbolAtLocation(node);
+            // Only allow a symbol to be renamed if it actually has at least one declaration.
+            if (symbol) {
+                var declarations = symbol.getDeclarations();
+                if (declarations && declarations.length > 0) {
+                    // Disallow rename for elements that are defined in the standard TypeScript library.
+                    if (ts.some(declarations, isDefinedInLibraryFile)) {
+                        return getRenameInfoError(ts.Diagnostics.You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library);
+                    }
+                    // Cannot rename `default` as in `import { default as foo } from "./someModule";
+                    if (node.kind === 71 /* Identifier */ &&
+                        node.originalKeywordKind === 79 /* DefaultKeyword */ &&
+                        symbol.parent.flags & 1536 /* Module */) {
+                        return undefined;
                     }
+                    var displayName = ts.stripQuotes(ts.getDeclaredName(typeChecker, symbol, node));
+                    var kind = ts.SymbolDisplay.getSymbolKind(typeChecker, symbol, node);
+                    return kind ? getRenameInfoSuccess(displayName, typeChecker.getFullyQualifiedName(symbol), kind, ts.SymbolDisplay.getSymbolModifiers(symbol), node, sourceFile) : undefined;
                 }
-                return false;
             }
-            function createTriggerSpanForNode(node, sourceFile) {
-                var start = node.getStart(sourceFile);
-                var width = node.getWidth(sourceFile);
-                if (node.kind === 9 /* StringLiteral */) {
-                    // Exclude the quotes
-                    start += 1;
-                    width -= 2;
+            else if (node.kind === 9 /* StringLiteral */) {
+                if (isDefinedInLibraryFile(node)) {
+                    return getRenameInfoError(ts.Diagnostics.You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library);
                 }
-                return ts.createTextSpan(start, width);
+                var displayName = ts.stripQuotes(node.text);
+                return getRenameInfoSuccess(displayName, displayName, "var" /* variableElement */, "" /* none */, node, sourceFile);
             }
         }
-        Rename.getRenameInfo = getRenameInfo;
+        function getRenameInfoSuccess(displayName, fullDisplayName, kind, kindModifiers, node, sourceFile) {
+            return {
+                canRename: true,
+                kind: kind,
+                displayName: displayName,
+                localizedErrorMessage: undefined,
+                fullDisplayName: fullDisplayName,
+                kindModifiers: kindModifiers,
+                triggerSpan: createTriggerSpanForNode(node, sourceFile)
+            };
+        }
+        function getRenameInfoError(diagnostic) {
+            return {
+                canRename: false,
+                localizedErrorMessage: ts.getLocaleSpecificMessage(diagnostic),
+                displayName: undefined,
+                fullDisplayName: undefined,
+                kind: undefined,
+                kindModifiers: undefined,
+                triggerSpan: undefined
+            };
+        }
+        function createTriggerSpanForNode(node, sourceFile) {
+            var start = node.getStart(sourceFile);
+            var width = node.getWidth(sourceFile);
+            if (node.kind === 9 /* StringLiteral */) {
+                // Exclude the quotes
+                start += 1;
+                width -= 2;
+            }
+            return ts.createTextSpan(start, width);
+        }
+        function nodeIsEligibleForRename(node) {
+            return node.kind === 71 /* Identifier */ ||
+                node.kind === 9 /* StringLiteral */ ||
+                ts.isLiteralNameOfPropertyDeclarationOrIndexAccess(node) ||
+                ts.isThis(node);
+        }
     })(Rename = ts.Rename || (ts.Rename = {}));
 })(ts || (ts = {}));
 ///<reference path='services.ts' />
@@ -69337,145 +83082,14 @@ var ts;
 (function (ts) {
     var SignatureHelp;
     (function (SignatureHelp) {
-        // A partially written generic type expression is not guaranteed to have the correct syntax tree. the expression could be parsed as less than/greater than expression or a comma expression
-        // or some other combination depending on what the user has typed so far. For the purposes of signature help we need to consider any location after "<" as a possible generic type reference.
-        // To do this, the method will back parse the expression starting at the position required. it will try to parse the current expression as a generic type expression, if it did succeed it
-        // will return the generic identifier that started the expression (e.g. "foo" in "foo<any, |"). It is then up to the caller to ensure that this is a valid generic expression through
-        // looking up the type. The method will also keep track of the parameter index inside the expression.
-        // public static isInPartiallyWrittenTypeArgumentList(syntaxTree: TypeScript.SyntaxTree, position: number): any {
-        //    let token = Syntax.findTokenOnLeft(syntaxTree.sourceUnit(), position, /*includeSkippedTokens*/ true);
-        //    if (token && TypeScript.Syntax.hasAncestorOfKind(token, TypeScript.SyntaxKind.TypeParameterList)) {
-        //        // We are in the wrong generic list. bail out
-        //        return null;
-        //    }
-        //    let stack = 0;
-        //    let argumentIndex = 0;
-        //    whileLoop:
-        //    while (token) {
-        //        switch (token.kind()) {
-        //            case TypeScript.SyntaxKind.LessThanToken:
-        //                if (stack === 0) {
-        //                    // Found the beginning of the generic argument expression
-        //                    let lessThanToken = token;
-        //                    token = previousToken(token, /*includeSkippedTokens*/ true);
-        //                    if (!token || token.kind() !== TypeScript.SyntaxKind.IdentifierName) {
-        //                        break whileLoop;
-        //                    }
-        //                    // Found the name, return the data
-        //                    return {
-        //                        genericIdentifer: token,
-        //                        lessThanToken: lessThanToken,
-        //                        argumentIndex: argumentIndex
-        //                    };
-        //                }
-        //                else if (stack < 0) {
-        //                    // Seen one too many less than tokens, bail out
-        //                    break whileLoop;
-        //                }
-        //                else {
-        //                    stack--;
-        //                }
-        //                break;
-        //            case TypeScript.SyntaxKind.GreaterThanGreaterThanGreaterThanToken:
-        //                stack++;
-        //            // Intentional fall through
-        //            case TypeScript.SyntaxKind.GreaterThanToken:
-        //                stack++;
-        //                break;
-        //            case TypeScript.SyntaxKind.CommaToken:
-        //                if (stack == 0) {
-        //                    argumentIndex++;
-        //                }
-        //                break;
-        //            case TypeScript.SyntaxKind.CloseBraceToken:
-        //                // This can be object type, skip untill we find the matching open brace token
-        //                let unmatchedOpenBraceTokens = 0;
-        //                // Skip untill the matching open brace token
-        //                token = SignatureInfoHelpers.moveBackUpTillMatchingTokenKind(token, TypeScript.SyntaxKind.CloseBraceToken, TypeScript.SyntaxKind.OpenBraceToken);
-        //                if (!token) {
-        //                    // No matching token was found. bail out
-        //                    break whileLoop;
-        //                }
-        //                break;
-        //            case TypeScript.SyntaxKind.EqualsGreaterThanToken:
-        //                // This can be a function type or a constructor type. In either case, we want to skip the function definition
-        //                token = previousToken(token, /*includeSkippedTokens*/ true);
-        //                if (token && token.kind() === TypeScript.SyntaxKind.CloseParenToken) {
-        //                    // Skip untill the matching open paren token
-        //                    token = SignatureInfoHelpers.moveBackUpTillMatchingTokenKind(token, TypeScript.SyntaxKind.CloseParenToken, TypeScript.SyntaxKind.OpenParenToken);
-        //                    if (token && token.kind() === TypeScript.SyntaxKind.GreaterThanToken) {
-        //                        // Another generic type argument list, skip it\
-        //                        token = SignatureInfoHelpers.moveBackUpTillMatchingTokenKind(token, TypeScript.SyntaxKind.GreaterThanToken, TypeScript.SyntaxKind.LessThanToken);
-        //                    }
-        //                    if (token && token.kind() === TypeScript.SyntaxKind.NewKeyword) {
-        //                        // In case this was a constructor type, skip the new keyword
-        //                        token = previousToken(token, /*includeSkippedTokens*/ true);
-        //                    }
-        //                    if (!token) {
-        //                        // No matching token was found. bail out
-        //                        break whileLoop;
-        //                    }
-        //                }
-        //                else {
-        //                    // This is not a function type. exit the main loop
-        //                    break whileLoop;
-        //                }
-        //                break;
-        //            case TypeScript.SyntaxKind.IdentifierName:
-        //            case TypeScript.SyntaxKind.AnyKeyword:
-        //            case TypeScript.SyntaxKind.NumberKeyword:
-        //            case TypeScript.SyntaxKind.StringKeyword:
-        //            case TypeScript.SyntaxKind.VoidKeyword:
-        //            case TypeScript.SyntaxKind.BooleanKeyword:
-        //            case TypeScript.SyntaxKind.DotToken:
-        //            case TypeScript.SyntaxKind.OpenBracketToken:
-        //            case TypeScript.SyntaxKind.CloseBracketToken:
-        //                // Valid tokens in a type name. Skip.
-        //                break;
-        //            default:
-        //                break whileLoop;
-        //        }
-        //        token = previousToken(token, /*includeSkippedTokens*/ true);
-        //    }
-        //    return null;
-        // }
-        // private static moveBackUpTillMatchingTokenKind(token: TypeScript.ISyntaxToken, tokenKind: TypeScript.SyntaxKind, matchingTokenKind: TypeScript.SyntaxKind): TypeScript.ISyntaxToken {
-        //    if (!token || token.kind() !== tokenKind) {
-        //        throw TypeScript.Errors.invalidOperation();
-        //    }
-        //    // Skip the current token
-        //    token = previousToken(token, /*includeSkippedTokens*/ true);
-        //    let stack = 0;
-        //    while (token) {
-        //        if (token.kind() === matchingTokenKind) {
-        //            if (stack === 0) {
-        //                // Found the matching token, return
-        //                return token;
-        //            }
-        //            else if (stack < 0) {
-        //                // tokens overlapped.. bail out.
-        //                break;
-        //            }
-        //            else {
-        //                stack--;
-        //            }
-        //        }
-        //        else if (token.kind() === tokenKind) {
-        //            stack++;
-        //        }
-        //        // Move back
-        //        token = previousToken(token, /*includeSkippedTokens*/ true);
-        //    }
-        //    // Did not find matching token
-        //    return null;
-        // }
         var emptyArray = [];
+        var ArgumentListKind;
         (function (ArgumentListKind) {
             ArgumentListKind[ArgumentListKind["TypeArguments"] = 0] = "TypeArguments";
             ArgumentListKind[ArgumentListKind["CallArguments"] = 1] = "CallArguments";
             ArgumentListKind[ArgumentListKind["TaggedTemplateArguments"] = 2] = "TaggedTemplateArguments";
-        })(SignatureHelp.ArgumentListKind || (SignatureHelp.ArgumentListKind = {}));
-        var ArgumentListKind = SignatureHelp.ArgumentListKind;
+            ArgumentListKind[ArgumentListKind["JSXAttributesArguments"] = 3] = "JSXAttributesArguments";
+        })(ArgumentListKind = SignatureHelp.ArgumentListKind || (SignatureHelp.ArgumentListKind = {}));
         function getSignatureHelpItems(program, sourceFile, position, cancellationToken) {
             var typeChecker = program.getTypeChecker();
             // Decide whether to show signature help
@@ -69506,15 +83120,15 @@ var ts;
         }
         SignatureHelp.getSignatureHelpItems = getSignatureHelpItems;
         function createJavaScriptSignatureHelpItems(argumentInfo, program) {
-            if (argumentInfo.invocation.kind !== 174 /* CallExpression */) {
+            if (argumentInfo.invocation.kind !== 181 /* CallExpression */) {
                 return undefined;
             }
             // See if we can find some symbol with the call expression name that has call signatures.
             var callExpression = argumentInfo.invocation;
             var expression = callExpression.expression;
-            var name = expression.kind === 69 /* Identifier */
+            var name = expression.kind === 71 /* Identifier */
                 ? expression
-                : expression.kind === 172 /* PropertyAccessExpression */
+                : expression.kind === 179 /* PropertyAccessExpression */
                     ? expression.name
                     : undefined;
             if (!name || !name.text) {
@@ -69524,10 +83138,10 @@ var ts;
             for (var _i = 0, _a = program.getSourceFiles(); _i < _a.length; _i++) {
                 var sourceFile = _a[_i];
                 var nameToDeclarations = sourceFile.getNamedDeclarations();
-                var declarations = nameToDeclarations[name.text];
+                var declarations = nameToDeclarations.get(name.text);
                 if (declarations) {
-                    for (var _b = 0, declarations_10 = declarations; _b < declarations_10.length; _b++) {
-                        var declaration = declarations_10[_b];
+                    for (var _b = 0, declarations_13 = declarations; _b < declarations_13.length; _b++) {
+                        var declaration = declarations_13[_b];
                         var symbol = declaration.symbol;
                         if (symbol) {
                             var type = typeChecker.getTypeOfSymbolAtLocation(symbol, declaration);
@@ -69547,24 +83161,24 @@ var ts;
          * in the argument of an invocation; returns undefined otherwise.
          */
         function getImmediatelyContainingArgumentInfo(node, position, sourceFile) {
-            if (node.parent.kind === 174 /* CallExpression */ || node.parent.kind === 175 /* NewExpression */) {
+            if (ts.isCallOrNewExpression(node.parent)) {
                 var callExpression = node.parent;
                 // There are 3 cases to handle:
-                //   1. The token introduces a list, and should begin a sig help session
+                //   1. The token introduces a list, and should begin a signature help session
                 //   2. The token is either not associated with a list, or ends a list, so the session should end
-                //   3. The token is buried inside a list, and should give sig help
+                //   3. The token is buried inside a list, and should give signature help
                 //
                 // The following are examples of each:
                 //
                 //    Case 1:
-                //          foo<#T, U>(#a, b)    -> The token introduces a list, and should begin a sig help session
+                //          foo<#T, U>(#a, b)    -> The token introduces a list, and should begin a signature help session
                 //    Case 2:
                 //          fo#o<T, U>#(a, b)#   -> The token is either not associated with a list, or ends a list, so the session should end
                 //    Case 3:
-                //          foo<T#, U#>(a#, #b#) -> The token is buried inside a list, and should give sig help
+                //          foo<T#, U#>(a#, #b#) -> The token is buried inside a list, and should give signature help
                 // Find out if 'node' is an argument, a type argument, or neither
-                if (node.kind === 25 /* LessThanToken */ ||
-                    node.kind === 17 /* OpenParenToken */) {
+                if (node.kind === 27 /* LessThanToken */ ||
+                    node.kind === 19 /* OpenParenToken */) {
                     // Find the list that starts right *after* the < or ( token.
                     // If the user has just opened a list, consider this item 0.
                     var list = getChildListThatStartsWithOpenerToken(callExpression, node, sourceFile);
@@ -69580,7 +83194,7 @@ var ts;
                 }
                 // findListItemInfo can return undefined if we are not in parent's argument list
                 // or type argument list. This includes cases where the cursor is:
-                //   - To the right of the closing paren, non-substitution template, or template tail.
+                //   - To the right of the closing parenthesis, non-substitution template, or template tail.
                 //   - Between the type arguments and the arguments (greater than token)
                 //   - On the target of the call (parent.func)
                 //   - On the 'new' keyword in a 'new' expression
@@ -69601,35 +83215,52 @@ var ts;
                 }
                 return undefined;
             }
-            else if (node.kind === 11 /* NoSubstitutionTemplateLiteral */ && node.parent.kind === 176 /* TaggedTemplateExpression */) {
+            else if (node.kind === 13 /* NoSubstitutionTemplateLiteral */ && node.parent.kind === 183 /* TaggedTemplateExpression */) {
                 // Check if we're actually inside the template;
                 // otherwise we'll fall out and return undefined.
                 if (ts.isInsideTemplateLiteral(node, position)) {
                     return getArgumentListInfoForTemplate(node.parent, /*argumentIndex*/ 0, sourceFile);
                 }
             }
-            else if (node.kind === 12 /* TemplateHead */ && node.parent.parent.kind === 176 /* TaggedTemplateExpression */) {
+            else if (node.kind === 14 /* TemplateHead */ && node.parent.parent.kind === 183 /* TaggedTemplateExpression */) {
                 var templateExpression = node.parent;
                 var tagExpression = templateExpression.parent;
-                ts.Debug.assert(templateExpression.kind === 189 /* TemplateExpression */);
+                ts.Debug.assert(templateExpression.kind === 196 /* TemplateExpression */);
                 var argumentIndex = ts.isInsideTemplateLiteral(node, position) ? 0 : 1;
                 return getArgumentListInfoForTemplate(tagExpression, argumentIndex, sourceFile);
             }
-            else if (node.parent.kind === 197 /* TemplateSpan */ && node.parent.parent.parent.kind === 176 /* TaggedTemplateExpression */) {
+            else if (node.parent.kind === 205 /* TemplateSpan */ && node.parent.parent.parent.kind === 183 /* TaggedTemplateExpression */) {
                 var templateSpan = node.parent;
                 var templateExpression = templateSpan.parent;
                 var tagExpression = templateExpression.parent;
-                ts.Debug.assert(templateExpression.kind === 189 /* TemplateExpression */);
+                ts.Debug.assert(templateExpression.kind === 196 /* TemplateExpression */);
                 // If we're just after a template tail, don't show signature help.
-                if (node.kind === 14 /* TemplateTail */ && !ts.isInsideTemplateLiteral(node, position)) {
+                if (node.kind === 16 /* TemplateTail */ && !ts.isInsideTemplateLiteral(node, position)) {
                     return undefined;
                 }
                 var spanIndex = templateExpression.templateSpans.indexOf(templateSpan);
                 var argumentIndex = getArgumentIndexForTemplatePiece(spanIndex, node, position);
                 return getArgumentListInfoForTemplate(tagExpression, argumentIndex, sourceFile);
             }
+            else if (node.parent && ts.isJsxOpeningLikeElement(node.parent)) {
+                // Provide a signature help for JSX opening element or JSX self-closing element.
+                // This is not guarantee that JSX tag-name is resolved into stateless function component. (that is done in "getSignatureHelpItems")
+                // i.e
+                //      export function MainButton(props: ButtonProps, context: any): JSX.Element { ... }
+                //      <MainButton /*signatureHelp*/
+                var attributeSpanStart = node.parent.attributes.getFullStart();
+                var attributeSpanEnd = ts.skipTrivia(sourceFile.text, node.parent.attributes.getEnd(), /*stopAfterLineBreak*/ false);
+                return {
+                    kind: 3 /* JSXAttributesArguments */,
+                    invocation: node.parent,
+                    argumentsSpan: ts.createTextSpan(attributeSpanStart, attributeSpanEnd - attributeSpanStart),
+                    argumentIndex: 0,
+                    argumentCount: 1
+                };
+            }
             return undefined;
         }
+        SignatureHelp.getImmediatelyContainingArgumentInfo = getImmediatelyContainingArgumentInfo;
         function getArgumentIndex(argumentsList, node) {
             // The list we got back can include commas.  In the presence of errors it may
             // also just have nodes without commas.  For example "Foo(a b c)" will have 3
@@ -69649,7 +83280,7 @@ var ts;
                 if (child === node) {
                     break;
                 }
-                if (child.kind !== 24 /* CommaToken */) {
+                if (child.kind !== 26 /* CommaToken */) {
                     argumentIndex++;
                 }
             }
@@ -69665,11 +83296,11 @@ var ts;
             //
             // Note: this subtlety only applies to the last comma.  If you had "Foo(a,,"  then
             // we'll have:  'a' '<comma>' '<missing>'
-            // That will give us 2 non-commas.  We then add one for the last comma, givin us an
+            // That will give us 2 non-commas.  We then add one for the last comma, giving us an
             // arg count of 3.
             var listChildren = argumentsList.getChildren();
-            var argumentCount = ts.countWhere(listChildren, function (arg) { return arg.kind !== 24 /* CommaToken */; });
-            if (listChildren.length > 0 && ts.lastOrUndefined(listChildren).kind === 24 /* CommaToken */) {
+            var argumentCount = ts.countWhere(listChildren, function (arg) { return arg.kind !== 26 /* CommaToken */; });
+            if (listChildren.length > 0 && ts.lastOrUndefined(listChildren).kind === 26 /* CommaToken */) {
                 argumentCount++;
             }
             return argumentCount;
@@ -69699,7 +83330,7 @@ var ts;
         }
         function getArgumentListInfoForTemplate(tagExpression, argumentIndex, sourceFile) {
             // argumentCount is either 1 or (numSpans + 1) to account for the template strings array argument.
-            var argumentCount = tagExpression.template.kind === 11 /* NoSubstitutionTemplateLiteral */
+            var argumentCount = tagExpression.template.kind === 13 /* NoSubstitutionTemplateLiteral */
                 ? 1
                 : tagExpression.template.templateSpans.length + 1;
             ts.Debug.assert(argumentIndex === 0 || argumentIndex < argumentCount, "argumentCount < argumentIndex, " + argumentCount + " < " + argumentIndex);
@@ -69737,7 +83368,7 @@ var ts;
             //
             // This is because a Missing node has no width. However, what we actually want is to include trivia
             // leading up to the next token in case the user is about to type in a TemplateMiddle or TemplateTail.
-            if (template.kind === 189 /* TemplateExpression */) {
+            if (template.kind === 196 /* TemplateExpression */) {
                 var lastSpan = ts.lastOrUndefined(template.templateSpans);
                 if (lastSpan.literal.getFullWidth() === 0) {
                     applicableSpanEnd = ts.skipTrivia(sourceFile.text, applicableSpanEnd, /*stopAfterLineBreak*/ false);
@@ -69746,7 +83377,7 @@ var ts;
             return ts.createTextSpan(applicableSpanStart, applicableSpanEnd - applicableSpanStart);
         }
         function getContainingArgumentInfo(node, position, sourceFile) {
-            for (var n = node; n.kind !== 256 /* SourceFile */; n = n.parent) {
+            for (var n = node; n.kind !== 265 /* SourceFile */; n = n.parent) {
                 if (ts.isFunctionBlock(n)) {
                     return undefined;
                 }
@@ -69759,6 +83390,7 @@ var ts;
                 if (argumentInfo) {
                     return argumentInfo;
                 }
+                // TODO: Handle generic call with incomplete syntax
             }
             return undefined;
         }
@@ -69806,37 +83438,41 @@ var ts;
                 if (callTargetDisplayParts) {
                     ts.addRange(prefixDisplayParts, callTargetDisplayParts);
                 }
+                var isVariadic;
                 if (isTypeParameterList) {
-                    prefixDisplayParts.push(ts.punctuationPart(25 /* LessThanToken */));
+                    isVariadic = false; // type parameter lists are not variadic
+                    prefixDisplayParts.push(ts.punctuationPart(27 /* LessThanToken */));
                     var typeParameters = candidateSignature.typeParameters;
                     signatureHelpParameters = typeParameters && typeParameters.length > 0 ? ts.map(typeParameters, createSignatureHelpParameterForTypeParameter) : emptyArray;
-                    suffixDisplayParts.push(ts.punctuationPart(27 /* GreaterThanToken */));
+                    suffixDisplayParts.push(ts.punctuationPart(29 /* GreaterThanToken */));
                     var parameterParts = ts.mapToDisplayParts(function (writer) {
                         return typeChecker.getSymbolDisplayBuilder().buildDisplayForParametersAndDelimiters(candidateSignature.thisParameter, candidateSignature.parameters, writer, invocation);
                     });
                     ts.addRange(suffixDisplayParts, parameterParts);
                 }
                 else {
+                    isVariadic = candidateSignature.hasRestParameter;
                     var typeParameterParts = ts.mapToDisplayParts(function (writer) {
                         return typeChecker.getSymbolDisplayBuilder().buildDisplayForTypeParametersAndDelimiters(candidateSignature.typeParameters, writer, invocation);
                     });
                     ts.addRange(prefixDisplayParts, typeParameterParts);
-                    prefixDisplayParts.push(ts.punctuationPart(17 /* OpenParenToken */));
+                    prefixDisplayParts.push(ts.punctuationPart(19 /* OpenParenToken */));
                     var parameters = candidateSignature.parameters;
                     signatureHelpParameters = parameters.length > 0 ? ts.map(parameters, createSignatureHelpParameterForParameter) : emptyArray;
-                    suffixDisplayParts.push(ts.punctuationPart(18 /* CloseParenToken */));
+                    suffixDisplayParts.push(ts.punctuationPart(20 /* CloseParenToken */));
                 }
                 var returnTypeParts = ts.mapToDisplayParts(function (writer) {
                     return typeChecker.getSymbolDisplayBuilder().buildReturnTypeDisplay(candidateSignature, writer, invocation);
                 });
                 ts.addRange(suffixDisplayParts, returnTypeParts);
                 return {
-                    isVariadic: candidateSignature.hasRestParameter,
+                    isVariadic: isVariadic,
                     prefixDisplayParts: prefixDisplayParts,
                     suffixDisplayParts: suffixDisplayParts,
-                    separatorDisplayParts: [ts.punctuationPart(24 /* CommaToken */), ts.spacePart()],
+                    separatorDisplayParts: [ts.punctuationPart(26 /* CommaToken */), ts.spacePart()],
                     parameters: signatureHelpParameters,
-                    documentation: candidateSignature.getDocumentationComment()
+                    documentation: candidateSignature.getDocumentationComment(),
+                    tags: candidateSignature.getJsDocTags()
                 };
             });
             var argumentIndex = argumentListInfo.argumentIndex;
@@ -69886,71 +83522,73 @@ var ts;
     (function (SymbolDisplay) {
         // TODO(drosen): use contextual SemanticMeaning.
         function getSymbolKind(typeChecker, symbol, location) {
-            var flags = symbol.getFlags();
-            if (flags & 32 /* Class */)
-                return ts.getDeclarationOfKind(symbol, 192 /* ClassExpression */) ?
-                    ts.ScriptElementKind.localClassElement : ts.ScriptElementKind.classElement;
+            var flags = symbol.flags;
+            if (flags & 32 /* Class */) {
+                return ts.getDeclarationOfKind(symbol, 199 /* ClassExpression */) ?
+                    "local class" /* localClassElement */ : "class" /* classElement */;
+            }
             if (flags & 384 /* Enum */)
-                return ts.ScriptElementKind.enumElement;
+                return "enum" /* enumElement */;
             if (flags & 524288 /* TypeAlias */)
-                return ts.ScriptElementKind.typeElement;
+                return "type" /* typeElement */;
             if (flags & 64 /* Interface */)
-                return ts.ScriptElementKind.interfaceElement;
+                return "interface" /* interfaceElement */;
             if (flags & 262144 /* TypeParameter */)
-                return ts.ScriptElementKind.typeParameterElement;
-            var result = getSymbolKindOfConstructorPropertyMethodAccessorFunctionOrVar(typeChecker, symbol, flags, location);
-            if (result === ts.ScriptElementKind.unknown) {
+                return "type parameter" /* typeParameterElement */;
+            var result = getSymbolKindOfConstructorPropertyMethodAccessorFunctionOrVar(typeChecker, symbol, location);
+            if (result === "" /* unknown */) {
                 if (flags & 262144 /* TypeParameter */)
-                    return ts.ScriptElementKind.typeParameterElement;
+                    return "type parameter" /* typeParameterElement */;
                 if (flags & 8 /* EnumMember */)
-                    return ts.ScriptElementKind.variableElement;
+                    return "enum member" /* enumMemberElement */;
                 if (flags & 8388608 /* Alias */)
-                    return ts.ScriptElementKind.alias;
+                    return "alias" /* alias */;
                 if (flags & 1536 /* Module */)
-                    return ts.ScriptElementKind.moduleElement;
+                    return "module" /* moduleElement */;
             }
             return result;
         }
         SymbolDisplay.getSymbolKind = getSymbolKind;
-        function getSymbolKindOfConstructorPropertyMethodAccessorFunctionOrVar(typeChecker, symbol, flags, location) {
+        function getSymbolKindOfConstructorPropertyMethodAccessorFunctionOrVar(typeChecker, symbol, location) {
             if (typeChecker.isUndefinedSymbol(symbol)) {
-                return ts.ScriptElementKind.variableElement;
+                return "var" /* variableElement */;
             }
             if (typeChecker.isArgumentsSymbol(symbol)) {
-                return ts.ScriptElementKind.localVariableElement;
+                return "local var" /* localVariableElement */;
             }
-            if (location.kind === 97 /* ThisKeyword */ && ts.isExpression(location)) {
-                return ts.ScriptElementKind.parameterElement;
+            if (location.kind === 99 /* ThisKeyword */ && ts.isExpression(location)) {
+                return "parameter" /* parameterElement */;
             }
+            var flags = symbol.flags;
             if (flags & 3 /* Variable */) {
                 if (ts.isFirstDeclarationOfSymbolParameter(symbol)) {
-                    return ts.ScriptElementKind.parameterElement;
+                    return "parameter" /* parameterElement */;
                 }
                 else if (symbol.valueDeclaration && ts.isConst(symbol.valueDeclaration)) {
-                    return ts.ScriptElementKind.constElement;
+                    return "const" /* constElement */;
                 }
                 else if (ts.forEach(symbol.declarations, ts.isLet)) {
-                    return ts.ScriptElementKind.letElement;
+                    return "let" /* letElement */;
                 }
-                return isLocalVariableOrFunction(symbol) ? ts.ScriptElementKind.localVariableElement : ts.ScriptElementKind.variableElement;
+                return isLocalVariableOrFunction(symbol) ? "local var" /* localVariableElement */ : "var" /* variableElement */;
             }
             if (flags & 16 /* Function */)
-                return isLocalVariableOrFunction(symbol) ? ts.ScriptElementKind.localFunctionElement : ts.ScriptElementKind.functionElement;
+                return isLocalVariableOrFunction(symbol) ? "local function" /* localFunctionElement */ : "function" /* functionElement */;
             if (flags & 32768 /* GetAccessor */)
-                return ts.ScriptElementKind.memberGetAccessorElement;
+                return "getter" /* memberGetAccessorElement */;
             if (flags & 65536 /* SetAccessor */)
-                return ts.ScriptElementKind.memberSetAccessorElement;
+                return "setter" /* memberSetAccessorElement */;
             if (flags & 8192 /* Method */)
-                return ts.ScriptElementKind.memberFunctionElement;
+                return "method" /* memberFunctionElement */;
             if (flags & 16384 /* Constructor */)
-                return ts.ScriptElementKind.constructorImplementationElement;
+                return "constructor" /* constructorImplementationElement */;
             if (flags & 4 /* Property */) {
-                if (flags & 268435456 /* SyntheticProperty */) {
+                if (flags & 134217728 /* Transient */ && symbol.checkFlags & 6 /* Synthetic */) {
                     // If union property is result of union of non method (property/accessors/variables), it is labeled as property
                     var unionPropertyKind = ts.forEach(typeChecker.getRootSymbols(symbol), function (rootSymbol) {
                         var rootSymbolFlags = rootSymbol.getFlags();
                         if (rootSymbolFlags & (98308 /* PropertyOrAccessor */ | 3 /* Variable */)) {
-                            return ts.ScriptElementKind.memberVariableElement;
+                            return "property" /* memberVariableElement */;
                         }
                         ts.Debug.assert(!!(rootSymbolFlags & 8192 /* Method */));
                     });
@@ -69959,20 +83597,23 @@ var ts;
                         // make sure it has call signatures before we can label it as method
                         var typeOfUnionProperty = typeChecker.getTypeOfSymbolAtLocation(symbol, location);
                         if (typeOfUnionProperty.getCallSignatures().length) {
-                            return ts.ScriptElementKind.memberFunctionElement;
+                            return "method" /* memberFunctionElement */;
                         }
-                        return ts.ScriptElementKind.memberVariableElement;
+                        return "property" /* memberVariableElement */;
                     }
                     return unionPropertyKind;
                 }
-                return ts.ScriptElementKind.memberVariableElement;
+                if (location.parent && ts.isJsxAttribute(location.parent)) {
+                    return "JSX attribute" /* jsxAttribute */;
+                }
+                return "property" /* memberVariableElement */;
             }
-            return ts.ScriptElementKind.unknown;
+            return "" /* unknown */;
         }
         function getSymbolModifiers(symbol) {
             return symbol && symbol.declarations && symbol.declarations.length > 0
                 ? ts.getNodeModifiers(symbol.declarations[0])
-                : ts.ScriptElementKindModifier.none;
+                : "" /* none */;
         }
         SymbolDisplay.getSymbolModifiers = getSymbolModifiers;
         // TODO(drosen): Currently completion entry details passes the SemanticMeaning.All instead of using semanticMeaning of location
@@ -69980,21 +83621,22 @@ var ts;
             if (semanticMeaning === void 0) { semanticMeaning = ts.getMeaningFromLocation(location); }
             var displayParts = [];
             var documentation;
+            var tags;
             var symbolFlags = symbol.flags;
-            var symbolKind = getSymbolKindOfConstructorPropertyMethodAccessorFunctionOrVar(typeChecker, symbol, symbolFlags, location);
+            var symbolKind = getSymbolKindOfConstructorPropertyMethodAccessorFunctionOrVar(typeChecker, symbol, location);
             var hasAddedSymbolInfo;
-            var isThisExpression = location.kind === 97 /* ThisKeyword */ && ts.isExpression(location);
+            var isThisExpression = location.kind === 99 /* ThisKeyword */ && ts.isExpression(location);
             var type;
             // Class at constructor site need to be shown as constructor apart from property,method, vars
-            if (symbolKind !== ts.ScriptElementKind.unknown || symbolFlags & 32 /* Class */ || symbolFlags & 8388608 /* Alias */) {
+            if (symbolKind !== "" /* unknown */ || symbolFlags & 32 /* Class */ || symbolFlags & 8388608 /* Alias */) {
                 // If it is accessor they are allowed only if location is at name of the accessor
-                if (symbolKind === ts.ScriptElementKind.memberGetAccessorElement || symbolKind === ts.ScriptElementKind.memberSetAccessorElement) {
-                    symbolKind = ts.ScriptElementKind.memberVariableElement;
+                if (symbolKind === "getter" /* memberGetAccessorElement */ || symbolKind === "setter" /* memberSetAccessorElement */) {
+                    symbolKind = "property" /* memberVariableElement */;
                 }
                 var signature = void 0;
                 type = isThisExpression ? typeChecker.getTypeAtLocation(location) : typeChecker.getTypeOfSymbolAtLocation(symbol, location);
                 if (type) {
-                    if (location.parent && location.parent.kind === 172 /* PropertyAccessExpression */) {
+                    if (location.parent && location.parent.kind === 179 /* PropertyAccessExpression */) {
                         var right = location.parent.name;
                         // Either the location is on the right of a property access, or on the left and the right is missing
                         if (right === location || (right && right.getFullWidth() === 0)) {
@@ -70002,21 +83644,24 @@ var ts;
                         }
                     }
                     // try get the call/construct signature from the type if it matches
-                    var callExpression = void 0;
-                    if (location.kind === 174 /* CallExpression */ || location.kind === 175 /* NewExpression */) {
-                        callExpression = location;
+                    var callExpressionLike = void 0;
+                    if (ts.isCallOrNewExpression(location)) {
+                        callExpressionLike = location;
                     }
                     else if (ts.isCallExpressionTarget(location) || ts.isNewExpressionTarget(location)) {
-                        callExpression = location.parent;
+                        callExpressionLike = location.parent;
+                    }
+                    else if (location.parent && ts.isJsxOpeningLikeElement(location.parent) && ts.isFunctionLike(symbol.valueDeclaration)) {
+                        callExpressionLike = location.parent;
                     }
-                    if (callExpression) {
+                    if (callExpressionLike) {
                         var candidateSignatures = [];
-                        signature = typeChecker.getResolvedSignature(callExpression, candidateSignatures);
+                        signature = typeChecker.getResolvedSignature(callExpressionLike, candidateSignatures);
                         if (!signature && candidateSignatures.length) {
                             // Use the first candidate:
                             signature = candidateSignatures[0];
                         }
-                        var useConstructSignatures = callExpression.kind === 175 /* NewExpression */ || callExpression.expression.kind === 95 /* SuperKeyword */;
+                        var useConstructSignatures = callExpressionLike.kind === 182 /* NewExpression */ || (ts.isCallExpression(callExpressionLike) && callExpressionLike.expression.kind === 97 /* SuperKeyword */);
                         var allSignatures = useConstructSignatures ? type.getConstructSignatures() : type.getCallSignatures();
                         if (!ts.contains(allSignatures, signature.target) && !ts.contains(allSignatures, signature)) {
                             // Get the first signature if there is one -- allSignatures may contain
@@ -70026,15 +83671,15 @@ var ts;
                         if (signature) {
                             if (useConstructSignatures && (symbolFlags & 32 /* Class */)) {
                                 // Constructor
-                                symbolKind = ts.ScriptElementKind.constructorImplementationElement;
+                                symbolKind = "constructor" /* constructorImplementationElement */;
                                 addPrefixForAnyFunctionOrVar(type.symbol, symbolKind);
                             }
                             else if (symbolFlags & 8388608 /* Alias */) {
-                                symbolKind = ts.ScriptElementKind.alias;
+                                symbolKind = "alias" /* alias */;
                                 pushTypePart(symbolKind);
                                 displayParts.push(ts.spacePart());
                                 if (useConstructSignatures) {
-                                    displayParts.push(ts.keywordPart(92 /* NewKeyword */));
+                                    displayParts.push(ts.keywordPart(94 /* NewKeyword */));
                                     displayParts.push(ts.spacePart());
                                 }
                                 addFullSymbolName(symbol);
@@ -70043,23 +83688,24 @@ var ts;
                                 addPrefixForAnyFunctionOrVar(symbol, symbolKind);
                             }
                             switch (symbolKind) {
-                                case ts.ScriptElementKind.memberVariableElement:
-                                case ts.ScriptElementKind.variableElement:
-                                case ts.ScriptElementKind.constElement:
-                                case ts.ScriptElementKind.letElement:
-                                case ts.ScriptElementKind.parameterElement:
-                                case ts.ScriptElementKind.localVariableElement:
+                                case "JSX attribute" /* jsxAttribute */:
+                                case "property" /* memberVariableElement */:
+                                case "var" /* variableElement */:
+                                case "const" /* constElement */:
+                                case "let" /* letElement */:
+                                case "parameter" /* parameterElement */:
+                                case "local var" /* localVariableElement */:
                                     // If it is call or construct signature of lambda's write type name
-                                    displayParts.push(ts.punctuationPart(54 /* ColonToken */));
+                                    displayParts.push(ts.punctuationPart(56 /* ColonToken */));
                                     displayParts.push(ts.spacePart());
                                     if (useConstructSignatures) {
-                                        displayParts.push(ts.keywordPart(92 /* NewKeyword */));
+                                        displayParts.push(ts.keywordPart(94 /* NewKeyword */));
                                         displayParts.push(ts.spacePart());
                                     }
-                                    if (!(type.flags & 2097152 /* Anonymous */) && type.symbol) {
+                                    if (!(type.flags & 32768 /* Object */ && type.objectFlags & 16 /* Anonymous */) && type.symbol) {
                                         ts.addRange(displayParts, ts.symbolToDisplayParts(typeChecker, type.symbol, enclosingDeclaration, /*meaning*/ undefined, 1 /* WriteTypeParametersOrArguments */));
                                     }
-                                    addSignatureDisplayParts(signature, allSignatures, 8 /* WriteArrowStyleSignature */);
+                                    addSignatureDisplayParts(signature, allSignatures, 16 /* WriteArrowStyleSignature */);
                                     break;
                                 default:
                                     // Just signature
@@ -70069,41 +83715,47 @@ var ts;
                         }
                     }
                     else if ((ts.isNameOfFunctionDeclaration(location) && !(symbol.flags & 98304 /* Accessor */)) ||
-                        (location.kind === 121 /* ConstructorKeyword */ && location.parent.kind === 148 /* Constructor */)) {
+                        (location.kind === 123 /* ConstructorKeyword */ && location.parent.kind === 152 /* Constructor */)) {
                         // get the signature from the declaration and write it
-                        var functionDeclaration = location.parent;
-                        var allSignatures = functionDeclaration.kind === 148 /* Constructor */ ? type.getNonNullableType().getConstructSignatures() : type.getNonNullableType().getCallSignatures();
-                        if (!typeChecker.isImplementationOfOverload(functionDeclaration)) {
-                            signature = typeChecker.getSignatureFromDeclaration(functionDeclaration);
-                        }
-                        else {
-                            signature = allSignatures[0];
-                        }
-                        if (functionDeclaration.kind === 148 /* Constructor */) {
-                            // show (constructor) Type(...) signature
-                            symbolKind = ts.ScriptElementKind.constructorImplementationElement;
-                            addPrefixForAnyFunctionOrVar(type.symbol, symbolKind);
-                        }
-                        else {
-                            // (function/method) symbol(..signature)
-                            addPrefixForAnyFunctionOrVar(functionDeclaration.kind === 151 /* CallSignature */ &&
-                                !(type.symbol.flags & 2048 /* TypeLiteral */ || type.symbol.flags & 4096 /* ObjectLiteral */) ? type.symbol : symbol, symbolKind);
+                        var functionDeclaration_1 = location.parent;
+                        // Use function declaration to write the signatures only if the symbol corresponding to this declaration
+                        var locationIsSymbolDeclaration = ts.findDeclaration(symbol, function (declaration) {
+                            return declaration === (location.kind === 123 /* ConstructorKeyword */ ? functionDeclaration_1.parent : functionDeclaration_1);
+                        });
+                        if (locationIsSymbolDeclaration) {
+                            var allSignatures = functionDeclaration_1.kind === 152 /* Constructor */ ? type.getNonNullableType().getConstructSignatures() : type.getNonNullableType().getCallSignatures();
+                            if (!typeChecker.isImplementationOfOverload(functionDeclaration_1)) {
+                                signature = typeChecker.getSignatureFromDeclaration(functionDeclaration_1);
+                            }
+                            else {
+                                signature = allSignatures[0];
+                            }
+                            if (functionDeclaration_1.kind === 152 /* Constructor */) {
+                                // show (constructor) Type(...) signature
+                                symbolKind = "constructor" /* constructorImplementationElement */;
+                                addPrefixForAnyFunctionOrVar(type.symbol, symbolKind);
+                            }
+                            else {
+                                // (function/method) symbol(..signature)
+                                addPrefixForAnyFunctionOrVar(functionDeclaration_1.kind === 155 /* CallSignature */ &&
+                                    !(type.symbol.flags & 2048 /* TypeLiteral */ || type.symbol.flags & 4096 /* ObjectLiteral */) ? type.symbol : symbol, symbolKind);
+                            }
+                            addSignatureDisplayParts(signature, allSignatures);
+                            hasAddedSymbolInfo = true;
                         }
-                        addSignatureDisplayParts(signature, allSignatures);
-                        hasAddedSymbolInfo = true;
                     }
                 }
             }
             if (symbolFlags & 32 /* Class */ && !hasAddedSymbolInfo && !isThisExpression) {
-                if (ts.getDeclarationOfKind(symbol, 192 /* ClassExpression */)) {
+                if (ts.getDeclarationOfKind(symbol, 199 /* ClassExpression */)) {
                     // Special case for class expressions because we would like to indicate that
                     // the class name is local to the class body (similar to function expression)
                     //      (local class) class <className>
-                    pushTypePart(ts.ScriptElementKind.localClassElement);
+                    pushTypePart("local class" /* localClassElement */);
                 }
                 else {
                     // Class declaration has name which is not local.
-                    displayParts.push(ts.keywordPart(73 /* ClassKeyword */));
+                    displayParts.push(ts.keywordPart(75 /* ClassKeyword */));
                 }
                 displayParts.push(ts.spacePart());
                 addFullSymbolName(symbol);
@@ -70111,77 +83763,77 @@ var ts;
             }
             if ((symbolFlags & 64 /* Interface */) && (semanticMeaning & 2 /* Type */)) {
                 addNewLineIfDisplayPartsExist();
-                displayParts.push(ts.keywordPart(107 /* InterfaceKeyword */));
+                displayParts.push(ts.keywordPart(109 /* InterfaceKeyword */));
                 displayParts.push(ts.spacePart());
                 addFullSymbolName(symbol);
                 writeTypeParametersOfSymbol(symbol, sourceFile);
             }
             if (symbolFlags & 524288 /* TypeAlias */) {
                 addNewLineIfDisplayPartsExist();
-                displayParts.push(ts.keywordPart(134 /* TypeKeyword */));
+                displayParts.push(ts.keywordPart(138 /* TypeKeyword */));
                 displayParts.push(ts.spacePart());
                 addFullSymbolName(symbol);
                 writeTypeParametersOfSymbol(symbol, sourceFile);
                 displayParts.push(ts.spacePart());
-                displayParts.push(ts.operatorPart(56 /* EqualsToken */));
+                displayParts.push(ts.operatorPart(58 /* EqualsToken */));
                 displayParts.push(ts.spacePart());
-                ts.addRange(displayParts, ts.typeToDisplayParts(typeChecker, typeChecker.getDeclaredTypeOfSymbol(symbol), enclosingDeclaration, 512 /* InTypeAlias */));
+                ts.addRange(displayParts, ts.typeToDisplayParts(typeChecker, typeChecker.getDeclaredTypeOfSymbol(symbol), enclosingDeclaration, 1024 /* InTypeAlias */));
             }
             if (symbolFlags & 384 /* Enum */) {
                 addNewLineIfDisplayPartsExist();
                 if (ts.forEach(symbol.declarations, ts.isConstEnumDeclaration)) {
-                    displayParts.push(ts.keywordPart(74 /* ConstKeyword */));
+                    displayParts.push(ts.keywordPart(76 /* ConstKeyword */));
                     displayParts.push(ts.spacePart());
                 }
-                displayParts.push(ts.keywordPart(81 /* EnumKeyword */));
+                displayParts.push(ts.keywordPart(83 /* EnumKeyword */));
                 displayParts.push(ts.spacePart());
                 addFullSymbolName(symbol);
             }
             if (symbolFlags & 1536 /* Module */) {
                 addNewLineIfDisplayPartsExist();
-                var declaration = ts.getDeclarationOfKind(symbol, 225 /* ModuleDeclaration */);
-                var isNamespace = declaration && declaration.name && declaration.name.kind === 69 /* Identifier */;
-                displayParts.push(ts.keywordPart(isNamespace ? 126 /* NamespaceKeyword */ : 125 /* ModuleKeyword */));
+                var declaration = ts.getDeclarationOfKind(symbol, 233 /* ModuleDeclaration */);
+                var isNamespace = declaration && declaration.name && declaration.name.kind === 71 /* Identifier */;
+                displayParts.push(ts.keywordPart(isNamespace ? 129 /* NamespaceKeyword */ : 128 /* ModuleKeyword */));
                 displayParts.push(ts.spacePart());
                 addFullSymbolName(symbol);
             }
             if ((symbolFlags & 262144 /* TypeParameter */) && (semanticMeaning & 2 /* Type */)) {
                 addNewLineIfDisplayPartsExist();
-                displayParts.push(ts.punctuationPart(17 /* OpenParenToken */));
+                displayParts.push(ts.punctuationPart(19 /* OpenParenToken */));
                 displayParts.push(ts.textPart("type parameter"));
-                displayParts.push(ts.punctuationPart(18 /* CloseParenToken */));
+                displayParts.push(ts.punctuationPart(20 /* CloseParenToken */));
                 displayParts.push(ts.spacePart());
                 addFullSymbolName(symbol);
-                displayParts.push(ts.spacePart());
-                displayParts.push(ts.keywordPart(90 /* InKeyword */));
-                displayParts.push(ts.spacePart());
                 if (symbol.parent) {
                     // Class/Interface type parameter
+                    addInPrefix();
                     addFullSymbolName(symbol.parent, enclosingDeclaration);
                     writeTypeParametersOfSymbol(symbol.parent, enclosingDeclaration);
                 }
                 else {
                     // Method/function type parameter
-                    var declaration = ts.getDeclarationOfKind(symbol, 141 /* TypeParameter */);
-                    ts.Debug.assert(declaration !== undefined);
-                    declaration = declaration.parent;
+                    var decl = ts.getDeclarationOfKind(symbol, 145 /* TypeParameter */);
+                    ts.Debug.assert(decl !== undefined);
+                    var declaration = decl.parent;
                     if (declaration) {
                         if (ts.isFunctionLikeKind(declaration.kind)) {
+                            addInPrefix();
                             var signature = typeChecker.getSignatureFromDeclaration(declaration);
-                            if (declaration.kind === 152 /* ConstructSignature */) {
-                                displayParts.push(ts.keywordPart(92 /* NewKeyword */));
+                            if (declaration.kind === 156 /* ConstructSignature */) {
+                                displayParts.push(ts.keywordPart(94 /* NewKeyword */));
                                 displayParts.push(ts.spacePart());
                             }
-                            else if (declaration.kind !== 151 /* CallSignature */ && declaration.name) {
+                            else if (declaration.kind !== 155 /* CallSignature */ && declaration.name) {
                                 addFullSymbolName(declaration.symbol);
                             }
-                            ts.addRange(displayParts, ts.signatureToDisplayParts(typeChecker, signature, sourceFile, 32 /* WriteTypeArgumentsOfSignature */));
+                            ts.addRange(displayParts, ts.signatureToDisplayParts(typeChecker, signature, sourceFile, 64 /* WriteTypeArgumentsOfSignature */));
                         }
-                        else {
+                        else if (declaration.kind === 231 /* TypeAliasDeclaration */) {
                             // Type alias type parameter
                             // For example
                             //      type list<T> = T[];  // Both T will go through same code path
-                            displayParts.push(ts.keywordPart(134 /* TypeKeyword */));
+                            addInPrefix();
+                            displayParts.push(ts.keywordPart(138 /* TypeKeyword */));
                             displayParts.push(ts.spacePart());
                             addFullSymbolName(declaration.symbol);
                             writeTypeParametersOfSymbol(declaration.symbol, sourceFile);
@@ -70190,47 +83842,48 @@ var ts;
                 }
             }
             if (symbolFlags & 8 /* EnumMember */) {
+                symbolKind = "enum member" /* enumMemberElement */;
                 addPrefixForAnyFunctionOrVar(symbol, "enum member");
                 var declaration = symbol.declarations[0];
-                if (declaration.kind === 255 /* EnumMember */) {
+                if (declaration.kind === 264 /* EnumMember */) {
                     var constantValue = typeChecker.getConstantValue(declaration);
                     if (constantValue !== undefined) {
                         displayParts.push(ts.spacePart());
-                        displayParts.push(ts.operatorPart(56 /* EqualsToken */));
+                        displayParts.push(ts.operatorPart(58 /* EqualsToken */));
                         displayParts.push(ts.spacePart());
-                        displayParts.push(ts.displayPart(constantValue.toString(), ts.SymbolDisplayPartKind.numericLiteral));
+                        displayParts.push(ts.displayPart(ts.getTextOfConstantValue(constantValue), typeof constantValue === "number" ? ts.SymbolDisplayPartKind.numericLiteral : ts.SymbolDisplayPartKind.stringLiteral));
                     }
                 }
             }
             if (symbolFlags & 8388608 /* Alias */) {
                 addNewLineIfDisplayPartsExist();
-                if (symbol.declarations[0].kind === 228 /* NamespaceExportDeclaration */) {
-                    displayParts.push(ts.keywordPart(82 /* ExportKeyword */));
+                if (symbol.declarations[0].kind === 236 /* NamespaceExportDeclaration */) {
+                    displayParts.push(ts.keywordPart(84 /* ExportKeyword */));
                     displayParts.push(ts.spacePart());
-                    displayParts.push(ts.keywordPart(126 /* NamespaceKeyword */));
+                    displayParts.push(ts.keywordPart(129 /* NamespaceKeyword */));
                 }
                 else {
-                    displayParts.push(ts.keywordPart(89 /* ImportKeyword */));
+                    displayParts.push(ts.keywordPart(91 /* ImportKeyword */));
                 }
                 displayParts.push(ts.spacePart());
                 addFullSymbolName(symbol);
                 ts.forEach(symbol.declarations, function (declaration) {
-                    if (declaration.kind === 229 /* ImportEqualsDeclaration */) {
+                    if (declaration.kind === 237 /* ImportEqualsDeclaration */) {
                         var importEqualsDeclaration = declaration;
                         if (ts.isExternalModuleImportEqualsDeclaration(importEqualsDeclaration)) {
                             displayParts.push(ts.spacePart());
-                            displayParts.push(ts.operatorPart(56 /* EqualsToken */));
+                            displayParts.push(ts.operatorPart(58 /* EqualsToken */));
                             displayParts.push(ts.spacePart());
-                            displayParts.push(ts.keywordPart(129 /* RequireKeyword */));
-                            displayParts.push(ts.punctuationPart(17 /* OpenParenToken */));
+                            displayParts.push(ts.keywordPart(132 /* RequireKeyword */));
+                            displayParts.push(ts.punctuationPart(19 /* OpenParenToken */));
                             displayParts.push(ts.displayPart(ts.getTextOfNode(ts.getExternalModuleImportEqualsDeclarationExpression(importEqualsDeclaration)), ts.SymbolDisplayPartKind.stringLiteral));
-                            displayParts.push(ts.punctuationPart(18 /* CloseParenToken */));
+                            displayParts.push(ts.punctuationPart(20 /* CloseParenToken */));
                         }
                         else {
                             var internalAliasSymbol = typeChecker.getSymbolAtLocation(importEqualsDeclaration.moduleReference);
                             if (internalAliasSymbol) {
                                 displayParts.push(ts.spacePart());
-                                displayParts.push(ts.operatorPart(56 /* EqualsToken */));
+                                displayParts.push(ts.operatorPart(58 /* EqualsToken */));
                                 displayParts.push(ts.spacePart());
                                 addFullSymbolName(internalAliasSymbol, enclosingDeclaration);
                             }
@@ -70240,21 +83893,22 @@ var ts;
                 });
             }
             if (!hasAddedSymbolInfo) {
-                if (symbolKind !== ts.ScriptElementKind.unknown) {
+                if (symbolKind !== "" /* unknown */) {
                     if (type) {
                         if (isThisExpression) {
                             addNewLineIfDisplayPartsExist();
-                            displayParts.push(ts.keywordPart(97 /* ThisKeyword */));
+                            displayParts.push(ts.keywordPart(99 /* ThisKeyword */));
                         }
                         else {
                             addPrefixForAnyFunctionOrVar(symbol, symbolKind);
                         }
                         // For properties, variables and local vars: show the type
-                        if (symbolKind === ts.ScriptElementKind.memberVariableElement ||
+                        if (symbolKind === "property" /* memberVariableElement */ ||
+                            symbolKind === "JSX attribute" /* jsxAttribute */ ||
                             symbolFlags & 3 /* Variable */ ||
-                            symbolKind === ts.ScriptElementKind.localVariableElement ||
+                            symbolKind === "local var" /* localVariableElement */ ||
                             isThisExpression) {
-                            displayParts.push(ts.punctuationPart(54 /* ColonToken */));
+                            displayParts.push(ts.punctuationPart(56 /* ColonToken */));
                             displayParts.push(ts.spacePart());
                             // If the type is type parameter, format it specially
                             if (type.symbol && type.symbol.flags & 262144 /* TypeParameter */) {
@@ -70272,7 +83926,7 @@ var ts;
                             symbolFlags & 16384 /* Constructor */ ||
                             symbolFlags & 131072 /* Signature */ ||
                             symbolFlags & 98304 /* Accessor */ ||
-                            symbolKind === ts.ScriptElementKind.memberFunctionElement) {
+                            symbolKind === "method" /* memberFunctionElement */) {
                             var allSignatures = type.getNonNullableType().getCallSignatures();
                             addSignatureDisplayParts(allSignatures[0], allSignatures);
                         }
@@ -70284,14 +83938,15 @@ var ts;
             }
             if (!documentation) {
                 documentation = symbol.getDocumentationComment();
+                tags = symbol.getJsDocTags();
                 if (documentation.length === 0 && symbol.flags & 4 /* Property */) {
-                    // For some special property access expressions like `experts.foo = foo` or `module.exports.foo = foo`
+                    // For some special property access expressions like `exports.foo = foo` or `module.exports.foo = foo`
                     // there documentation comments might be attached to the right hand side symbol of their declarations.
                     // The pattern of such special property access is that the parent symbol is the symbol of the file.
-                    if (symbol.parent && ts.forEach(symbol.parent.declarations, function (declaration) { return declaration.kind === 256 /* SourceFile */; })) {
+                    if (symbol.parent && ts.forEach(symbol.parent.declarations, function (declaration) { return declaration.kind === 265 /* SourceFile */; })) {
                         for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
                             var declaration = _a[_i];
-                            if (!declaration.parent || declaration.parent.kind !== 187 /* BinaryExpression */) {
+                            if (!declaration.parent || declaration.parent.kind !== 194 /* BinaryExpression */) {
                                 continue;
                             }
                             var rhsSymbol = typeChecker.getSymbolAtLocation(declaration.parent.right);
@@ -70299,6 +83954,7 @@ var ts;
                                 continue;
                             }
                             documentation = rhsSymbol.getDocumentationComment();
+                            tags = rhsSymbol.getJsDocTags();
                             if (documentation.length > 0) {
                                 break;
                             }
@@ -70306,12 +83962,17 @@ var ts;
                     }
                 }
             }
-            return { displayParts: displayParts, documentation: documentation, symbolKind: symbolKind };
+            return { displayParts: displayParts, documentation: documentation, symbolKind: symbolKind, tags: tags };
             function addNewLineIfDisplayPartsExist() {
                 if (displayParts.length) {
                     displayParts.push(ts.lineBreakPart());
                 }
             }
+            function addInPrefix() {
+                displayParts.push(ts.spacePart());
+                displayParts.push(ts.keywordPart(92 /* InKeyword */));
+                displayParts.push(ts.spacePart());
+            }
             function addFullSymbolName(symbol, enclosingDeclaration) {
                 var fullSymbolDisplayParts = ts.symbolToDisplayParts(typeChecker, symbol, enclosingDeclaration || sourceFile, /*meaning*/ undefined, 1 /* WriteTypeParametersOrArguments */ | 2 /* UseOnlyExternalAliasing */);
                 ts.addRange(displayParts, fullSymbolDisplayParts);
@@ -70326,32 +83987,33 @@ var ts;
             }
             function pushTypePart(symbolKind) {
                 switch (symbolKind) {
-                    case ts.ScriptElementKind.variableElement:
-                    case ts.ScriptElementKind.functionElement:
-                    case ts.ScriptElementKind.letElement:
-                    case ts.ScriptElementKind.constElement:
-                    case ts.ScriptElementKind.constructorImplementationElement:
+                    case "var" /* variableElement */:
+                    case "function" /* functionElement */:
+                    case "let" /* letElement */:
+                    case "const" /* constElement */:
+                    case "constructor" /* constructorImplementationElement */:
                         displayParts.push(ts.textOrKeywordPart(symbolKind));
                         return;
                     default:
-                        displayParts.push(ts.punctuationPart(17 /* OpenParenToken */));
+                        displayParts.push(ts.punctuationPart(19 /* OpenParenToken */));
                         displayParts.push(ts.textOrKeywordPart(symbolKind));
-                        displayParts.push(ts.punctuationPart(18 /* CloseParenToken */));
+                        displayParts.push(ts.punctuationPart(20 /* CloseParenToken */));
                         return;
                 }
             }
             function addSignatureDisplayParts(signature, allSignatures, flags) {
-                ts.addRange(displayParts, ts.signatureToDisplayParts(typeChecker, signature, enclosingDeclaration, flags | 32 /* WriteTypeArgumentsOfSignature */));
+                ts.addRange(displayParts, ts.signatureToDisplayParts(typeChecker, signature, enclosingDeclaration, flags | 64 /* WriteTypeArgumentsOfSignature */));
                 if (allSignatures.length > 1) {
                     displayParts.push(ts.spacePart());
-                    displayParts.push(ts.punctuationPart(17 /* OpenParenToken */));
-                    displayParts.push(ts.operatorPart(35 /* PlusToken */));
+                    displayParts.push(ts.punctuationPart(19 /* OpenParenToken */));
+                    displayParts.push(ts.operatorPart(37 /* PlusToken */));
                     displayParts.push(ts.displayPart((allSignatures.length - 1).toString(), ts.SymbolDisplayPartKind.numericLiteral));
                     displayParts.push(ts.spacePart());
                     displayParts.push(ts.textPart(allSignatures.length === 2 ? "overload" : "overloads"));
-                    displayParts.push(ts.punctuationPart(18 /* CloseParenToken */));
+                    displayParts.push(ts.punctuationPart(20 /* CloseParenToken */));
                 }
                 documentation = signature.getDocumentationComment();
+                tags = signature.getJsDocTags();
             }
             function writeTypeParametersOfSymbol(symbol, enclosingDeclaration) {
                 var typeParameterParts = ts.mapToDisplayParts(function (writer) {
@@ -70367,16 +84029,16 @@ var ts;
             }
             return ts.forEach(symbol.declarations, function (declaration) {
                 // Function expressions are local
-                if (declaration.kind === 179 /* FunctionExpression */) {
+                if (declaration.kind === 186 /* FunctionExpression */) {
                     return true;
                 }
-                if (declaration.kind !== 218 /* VariableDeclaration */ && declaration.kind !== 220 /* FunctionDeclaration */) {
+                if (declaration.kind !== 226 /* VariableDeclaration */ && declaration.kind !== 228 /* FunctionDeclaration */) {
                     return false;
                 }
                 // If the parent is not sourceFile or module block it is local variable
-                for (var parent_23 = declaration.parent; !ts.isFunctionBlock(parent_23); parent_23 = parent_23.parent) {
+                for (var parent_25 = declaration.parent; !ts.isFunctionBlock(parent_25); parent_25 = parent_25.parent) {
                     // Reached source file or module block
-                    if (parent_23.kind === 256 /* SourceFile */ || parent_23.kind === 226 /* ModuleBlock */) {
+                    if (parent_25.kind === 265 /* SourceFile */ || parent_25.kind === 234 /* ModuleBlock */) {
                         return false;
                     }
                 }
@@ -70429,7 +84091,7 @@ var ts;
             sourceFile.moduleName = transpileOptions.moduleName;
         }
         if (transpileOptions.renamedDependencies) {
-            sourceFile.renamedDependencies = ts.createMap(transpileOptions.renamedDependencies);
+            sourceFile.renamedDependencies = ts.createMapFromTemplate(transpileOptions.renamedDependencies);
         }
         var newLine = ts.getNewLineCharacter(options);
         // Output
@@ -70437,8 +84099,8 @@ var ts;
         var sourceMapText;
         // Create a compilerHost object to allow the compiler to read and write files
         var compilerHost = {
-            getSourceFile: function (fileName, target) { return fileName === ts.normalizePath(inputFileName) ? sourceFile : undefined; },
-            writeFile: function (name, text, writeByteOrderMark) {
+            getSourceFile: function (fileName) { return fileName === ts.normalizePath(inputFileName) ? sourceFile : undefined; },
+            writeFile: function (name, text) {
                 if (ts.fileExtensionIs(name, ".map")) {
                     ts.Debug.assert(sourceMapText === undefined, "Unexpected multiple source map outputs for the file '" + name + "'");
                     sourceMapText = text;
@@ -70454,9 +84116,9 @@ var ts;
             getCurrentDirectory: function () { return ""; },
             getNewLine: function () { return newLine; },
             fileExists: function (fileName) { return fileName === inputFileName; },
-            readFile: function (fileName) { return ""; },
-            directoryExists: function (directoryExists) { return true; },
-            getDirectories: function (path) { return []; }
+            readFile: function () { return ""; },
+            directoryExists: function () { return true; },
+            getDirectories: function () { return []; }
         };
         var program = ts.createProgram([inputFileName], options, compilerHost);
         if (transpileOptions.reportDiagnostics) {
@@ -70464,7 +84126,7 @@ var ts;
             ts.addRange(/*to*/ diagnostics, /*from*/ program.getOptionsDiagnostics());
         }
         // Emit
-        program.emit();
+        program.emit(/*targetSourceFile*/ undefined, /*writeFile*/ undefined, /*cancellationToken*/ undefined, /*emitOnlyDtsFiles*/ undefined, transpileOptions.transformers);
         ts.Debug.assert(outputText !== undefined, "Output generation failed");
         return { outputText: outputText, diagnostics: diagnostics, sourceMapText: sourceMapText };
     }
@@ -70481,13 +84143,14 @@ var ts;
     ts.transpile = transpile;
     var commandLineOptionsStringToEnum;
     /** JS users may pass in string values for enum compiler options (such as ModuleKind), so convert. */
+    /*@internal*/
     function fixupCompilerOptions(options, diagnostics) {
         // Lazily create this value to fix module loading errors.
         commandLineOptionsStringToEnum = commandLineOptionsStringToEnum || ts.filter(ts.optionDeclarations, function (o) {
-            return typeof o.type === "object" && !ts.forEachProperty(o.type, function (v) { return typeof v !== "number"; });
+            return typeof o.type === "object" && !ts.forEachEntry(o.type, function (v) { return typeof v !== "number"; });
         });
-        options = ts.clone(options);
-        var _loop_2 = function (opt) {
+        options = ts.cloneCompilerOptions(options);
+        var _loop_6 = function (opt) {
             if (!ts.hasProperty(options, opt.name)) {
                 return "continue";
             }
@@ -70498,7 +84161,7 @@ var ts;
                 options[opt.name] = ts.parseCustomTypeOption(opt, value, diagnostics);
             }
             else {
-                if (!ts.forEachProperty(opt.type, function (v) { return v === value; })) {
+                if (!ts.forEachEntry(opt.type, function (v) { return v === value; })) {
                     // Supplied value isn't a valid enum value.
                     diagnostics.push(ts.createCompilerDiagnosticForInvalidCustomType(opt));
                 }
@@ -70506,10 +84169,11 @@ var ts;
         };
         for (var _i = 0, commandLineOptionsStringToEnum_1 = commandLineOptionsStringToEnum; _i < commandLineOptionsStringToEnum_1.length; _i++) {
             var opt = commandLineOptionsStringToEnum_1[_i];
-            _loop_2(opt);
+            _loop_6(opt);
         }
         return options;
     }
+    ts.fixupCompilerOptions = fixupCompilerOptions;
 })(ts || (ts = {}));
 /// <reference path="formatting.ts"/>
 /// <reference path="..\..\compiler\scanner.ts"/>
@@ -70518,8 +84182,8 @@ var ts;
 (function (ts) {
     var formatting;
     (function (formatting) {
-        var standardScanner = ts.createScanner(2 /* Latest */, /*skipTrivia*/ false, 0 /* Standard */);
-        var jsxScanner = ts.createScanner(2 /* Latest */, /*skipTrivia*/ false, 1 /* JSX */);
+        var standardScanner = ts.createScanner(5 /* Latest */, /*skipTrivia*/ false, 0 /* Standard */);
+        var jsxScanner = ts.createScanner(5 /* Latest */, /*skipTrivia*/ false, 1 /* JSX */);
         /**
          * Scanner that is currently used for formatting
          */
@@ -70533,10 +84197,10 @@ var ts;
             ScanAction[ScanAction["RescanJsxIdentifier"] = 4] = "RescanJsxIdentifier";
             ScanAction[ScanAction["RescanJsxText"] = 5] = "RescanJsxText";
         })(ScanAction || (ScanAction = {}));
-        function getFormattingScanner(sourceFile, startPos, endPos) {
-            ts.Debug.assert(scanner === undefined);
-            scanner = sourceFile.languageVariant === 1 /* JSX */ ? jsxScanner : standardScanner;
-            scanner.setText(sourceFile.text);
+        function getFormattingScanner(text, languageVariant, startPos, endPos) {
+            ts.Debug.assert(scanner === undefined, "Scanner should be undefined");
+            scanner = languageVariant === 1 /* JSX */ ? jsxScanner : standardScanner;
+            scanner.setText(text);
             scanner.setTextPos(startPos);
             var wasNewLine = true;
             var leadingTrivia;
@@ -70559,7 +84223,7 @@ var ts;
                 }
             };
             function advance() {
-                ts.Debug.assert(scanner !== undefined);
+                ts.Debug.assert(scanner !== undefined, "Scanner should be present");
                 lastTokenInfo = undefined;
                 var isStarted = scanner.getStartPos() !== startPos;
                 if (isStarted) {
@@ -70601,11 +84265,11 @@ var ts;
             function shouldRescanGreaterThanToken(node) {
                 if (node) {
                     switch (node.kind) {
-                        case 29 /* GreaterThanEqualsToken */:
-                        case 64 /* GreaterThanGreaterThanEqualsToken */:
-                        case 65 /* GreaterThanGreaterThanGreaterThanEqualsToken */:
-                        case 45 /* GreaterThanGreaterThanGreaterThanToken */:
-                        case 44 /* GreaterThanGreaterThanToken */:
+                        case 31 /* GreaterThanEqualsToken */:
+                        case 66 /* GreaterThanGreaterThanEqualsToken */:
+                        case 67 /* GreaterThanGreaterThanGreaterThanEqualsToken */:
+                        case 47 /* GreaterThanGreaterThanGreaterThanToken */:
+                        case 46 /* GreaterThanGreaterThanToken */:
                             return true;
                     }
                 }
@@ -70614,27 +84278,27 @@ var ts;
             function shouldRescanJsxIdentifier(node) {
                 if (node.parent) {
                     switch (node.parent.kind) {
-                        case 246 /* JsxAttribute */:
-                        case 243 /* JsxOpeningElement */:
-                        case 245 /* JsxClosingElement */:
-                        case 242 /* JsxSelfClosingElement */:
-                            return node.kind === 69 /* Identifier */;
+                        case 253 /* JsxAttribute */:
+                        case 251 /* JsxOpeningElement */:
+                        case 252 /* JsxClosingElement */:
+                        case 250 /* JsxSelfClosingElement */:
+                            return node.kind === 71 /* Identifier */;
                     }
                 }
                 return false;
             }
             function shouldRescanJsxText(node) {
-                return node && node.kind === 244 /* JsxText */;
+                return node && node.kind === 10 /* JsxText */;
             }
             function shouldRescanSlashToken(container) {
-                return container.kind === 10 /* RegularExpressionLiteral */;
+                return container.kind === 12 /* RegularExpressionLiteral */;
             }
             function shouldRescanTemplateToken(container) {
-                return container.kind === 13 /* TemplateMiddle */ ||
-                    container.kind === 14 /* TemplateTail */;
+                return container.kind === 15 /* TemplateMiddle */ ||
+                    container.kind === 16 /* TemplateTail */;
             }
             function startsWithSlashToken(t) {
-                return t === 39 /* SlashToken */ || t === 61 /* SlashEqualsToken */;
+                return t === 41 /* SlashToken */ || t === 63 /* SlashEqualsToken */;
             }
             function readTokenInfo(n) {
                 ts.Debug.assert(scanner !== undefined);
@@ -70675,7 +84339,7 @@ var ts;
                     scanner.scan();
                 }
                 var currentToken = scanner.getToken();
-                if (expectedScanAction === 1 /* RescanGreaterThanToken */ && currentToken === 27 /* GreaterThanToken */) {
+                if (expectedScanAction === 1 /* RescanGreaterThanToken */ && currentToken === 29 /* GreaterThanToken */) {
                     currentToken = scanner.reScanGreaterToken();
                     ts.Debug.assert(n.kind === currentToken);
                     lastScanAction = 1 /* RescanGreaterThanToken */;
@@ -70685,11 +84349,11 @@ var ts;
                     ts.Debug.assert(n.kind === currentToken);
                     lastScanAction = 2 /* RescanSlashToken */;
                 }
-                else if (expectedScanAction === 3 /* RescanTemplateToken */ && currentToken === 16 /* CloseBraceToken */) {
+                else if (expectedScanAction === 3 /* RescanTemplateToken */ && currentToken === 18 /* CloseBraceToken */) {
                     currentToken = scanner.reScanTemplateToken();
                     lastScanAction = 3 /* RescanTemplateToken */;
                 }
-                else if (expectedScanAction === 4 /* RescanJsxIdentifier */ && currentToken === 69 /* Identifier */) {
+                else if (expectedScanAction === 4 /* RescanJsxIdentifier */ && currentToken === 71 /* Identifier */) {
                     currentToken = scanner.scanJsxIdentifier();
                     lastScanAction = 4 /* RescanJsxIdentifier */;
                 }
@@ -70738,8 +84402,8 @@ var ts;
             }
             function isOnToken() {
                 ts.Debug.assert(scanner !== undefined);
-                var current = (lastTokenInfo && lastTokenInfo.token.kind) || scanner.getToken();
-                var startPos = (lastTokenInfo && lastTokenInfo.token.pos) || scanner.getStartPos();
+                var current = lastTokenInfo ? lastTokenInfo.token.kind : scanner.getToken();
+                var startPos = lastTokenInfo ? lastTokenInfo.token.pos : scanner.getStartPos();
                 return startPos < endPos && current !== 1 /* EndOfFileToken */ && !ts.isTrivia(current);
             }
             // when containing node in the tree is token
@@ -70772,9 +84436,10 @@ var ts;
     var formatting;
     (function (formatting) {
         var FormattingContext = (function () {
-            function FormattingContext(sourceFile, formattingRequestKind) {
+            function FormattingContext(sourceFile, formattingRequestKind, options) {
                 this.sourceFile = sourceFile;
                 this.formattingRequestKind = formattingRequestKind;
+                this.options = options;
             }
             FormattingContext.prototype.updateContext = function (currentRange, currentTokenParent, nextRange, nextTokenParent, commonParent) {
                 ts.Debug.assert(currentRange !== undefined, "currentTokenSpan is null");
@@ -70832,8 +84497,8 @@ var ts;
                 return startLine === endLine;
             };
             FormattingContext.prototype.BlockIsOnOneLine = function (node) {
-                var openBrace = ts.findChildOfKind(node, 15 /* OpenBraceToken */, this.sourceFile);
-                var closeBrace = ts.findChildOfKind(node, 16 /* CloseBraceToken */, this.sourceFile);
+                var openBrace = ts.findChildOfKind(node, 17 /* OpenBraceToken */, this.sourceFile);
+                var closeBrace = ts.findChildOfKind(node, 18 /* CloseBraceToken */, this.sourceFile);
                 if (openBrace && closeBrace) {
                     var startLine = this.sourceFile.getLineAndCharacterOfPosition(openBrace.getEnd()).line;
                     var endLine = this.sourceFile.getLineAndCharacterOfPosition(closeBrace.getStart(this.sourceFile)).line;
@@ -70852,14 +84517,14 @@ var ts;
 (function (ts) {
     var formatting;
     (function (formatting) {
+        var FormattingRequestKind;
         (function (FormattingRequestKind) {
             FormattingRequestKind[FormattingRequestKind["FormatDocument"] = 0] = "FormatDocument";
             FormattingRequestKind[FormattingRequestKind["FormatSelection"] = 1] = "FormatSelection";
             FormattingRequestKind[FormattingRequestKind["FormatOnEnter"] = 2] = "FormatOnEnter";
             FormattingRequestKind[FormattingRequestKind["FormatOnSemicolon"] = 3] = "FormatOnSemicolon";
             FormattingRequestKind[FormattingRequestKind["FormatOnClosingCurlyBrace"] = 4] = "FormatOnClosingCurlyBrace";
-        })(formatting.FormattingRequestKind || (formatting.FormattingRequestKind = {}));
-        var FormattingRequestKind = formatting.FormattingRequestKind;
+        })(FormattingRequestKind = formatting.FormattingRequestKind || (formatting.FormattingRequestKind = {}));
     })(formatting = ts.formatting || (ts.formatting = {}));
 })(ts || (ts = {}));
 ///<reference path='references.ts' />
@@ -70880,24 +84545,720 @@ var ts;
                     "operation=" + this.Operation + "," +
                     "flag=" + this.Flag + "]";
             };
-            return Rule;
+            return Rule;
+        }());
+        formatting.Rule = Rule;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+///<reference path='references.ts' />
+/* @internal */
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var RuleAction;
+        (function (RuleAction) {
+            RuleAction[RuleAction["Ignore"] = 1] = "Ignore";
+            RuleAction[RuleAction["Space"] = 2] = "Space";
+            RuleAction[RuleAction["NewLine"] = 4] = "NewLine";
+            RuleAction[RuleAction["Delete"] = 8] = "Delete";
+        })(RuleAction = formatting.RuleAction || (formatting.RuleAction = {}));
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+///<reference path='references.ts' />
+/* @internal */
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var RuleDescriptor = (function () {
+            function RuleDescriptor(LeftTokenRange, RightTokenRange) {
+                this.LeftTokenRange = LeftTokenRange;
+                this.RightTokenRange = RightTokenRange;
+            }
+            RuleDescriptor.prototype.toString = function () {
+                return "[leftRange=" + this.LeftTokenRange + "," +
+                    "rightRange=" + this.RightTokenRange + "]";
+            };
+            RuleDescriptor.create1 = function (left, right) {
+                return RuleDescriptor.create4(formatting.Shared.TokenRange.FromToken(left), formatting.Shared.TokenRange.FromToken(right));
+            };
+            RuleDescriptor.create2 = function (left, right) {
+                return RuleDescriptor.create4(left, formatting.Shared.TokenRange.FromToken(right));
+            };
+            RuleDescriptor.create3 = function (left, right) {
+                return RuleDescriptor.create4(formatting.Shared.TokenRange.FromToken(left), right);
+            };
+            RuleDescriptor.create4 = function (left, right) {
+                return new RuleDescriptor(left, right);
+            };
+            return RuleDescriptor;
+        }());
+        formatting.RuleDescriptor = RuleDescriptor;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+///<reference path='references.ts' />
+/* @internal */
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var RuleFlags;
+        (function (RuleFlags) {
+            RuleFlags[RuleFlags["None"] = 0] = "None";
+            RuleFlags[RuleFlags["CanDeleteNewLines"] = 1] = "CanDeleteNewLines";
+        })(RuleFlags = formatting.RuleFlags || (formatting.RuleFlags = {}));
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+///<reference path='references.ts' />
+/* @internal */
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var RuleOperation = (function () {
+            function RuleOperation(Context, Action) {
+                this.Context = Context;
+                this.Action = Action;
+            }
+            RuleOperation.prototype.toString = function () {
+                return "[context=" + this.Context + "," +
+                    "action=" + this.Action + "]";
+            };
+            RuleOperation.create1 = function (action) {
+                return RuleOperation.create2(formatting.RuleOperationContext.Any, action);
+            };
+            RuleOperation.create2 = function (context, action) {
+                return new RuleOperation(context, action);
+            };
+            return RuleOperation;
+        }());
+        formatting.RuleOperation = RuleOperation;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+///<reference path='references.ts' />
+/* @internal */
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var RuleOperationContext = (function () {
+            function RuleOperationContext() {
+                var funcs = [];
+                for (var _i = 0; _i < arguments.length; _i++) {
+                    funcs[_i] = arguments[_i];
+                }
+                this.customContextChecks = funcs;
+            }
+            RuleOperationContext.prototype.IsAny = function () {
+                return this === RuleOperationContext.Any;
+            };
+            RuleOperationContext.prototype.InContext = function (context) {
+                if (this.IsAny()) {
+                    return true;
+                }
+                for (var _i = 0, _a = this.customContextChecks; _i < _a.length; _i++) {
+                    var check = _a[_i];
+                    if (!check(context)) {
+                        return false;
+                    }
+                }
+                return true;
+            };
+            return RuleOperationContext;
+        }());
+        RuleOperationContext.Any = new RuleOperationContext();
+        formatting.RuleOperationContext = RuleOperationContext;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+///<reference path='references.ts' />
+/* @internal */
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var Rules = (function () {
+            function Rules() {
+                ///
+                /// Common Rules
+                ///
+                // Leave comments alone
+                this.IgnoreBeforeComment = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.Comments), formatting.RuleOperation.create1(1 /* Ignore */));
+                this.IgnoreAfterLineComment = new formatting.Rule(formatting.RuleDescriptor.create3(2 /* SingleLineCommentTrivia */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create1(1 /* Ignore */));
+                // Space after keyword but not before ; or : or ?
+                this.NoSpaceBeforeSemicolon = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 25 /* SemicolonToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceBeforeColon = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 56 /* ColonToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 8 /* Delete */));
+                this.NoSpaceBeforeQuestionMark = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 55 /* QuestionToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 8 /* Delete */));
+                this.SpaceAfterColon = new formatting.Rule(formatting.RuleDescriptor.create3(56 /* ColonToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 2 /* Space */));
+                this.SpaceAfterQuestionMarkInConditionalOperator = new formatting.Rule(formatting.RuleDescriptor.create3(55 /* QuestionToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsConditionalOperatorContext), 2 /* Space */));
+                this.NoSpaceAfterQuestionMark = new formatting.Rule(formatting.RuleDescriptor.create3(55 /* QuestionToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.SpaceAfterSemicolon = new formatting.Rule(formatting.RuleDescriptor.create3(25 /* SemicolonToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                // Space after }.
+                this.SpaceAfterCloseBrace = new formatting.Rule(formatting.RuleDescriptor.create3(18 /* CloseBraceToken */, formatting.Shared.TokenRange.FromRange(0 /* FirstToken */, 142 /* LastToken */, [20 /* CloseParenToken */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsAfterCodeBlockContext), 2 /* Space */));
+                // Special case for (}, else) and (}, while) since else & while tokens are not part of the tree which makes SpaceAfterCloseBrace rule not applied
+                this.SpaceBetweenCloseBraceAndElse = new formatting.Rule(formatting.RuleDescriptor.create1(18 /* CloseBraceToken */, 82 /* ElseKeyword */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.SpaceBetweenCloseBraceAndWhile = new formatting.Rule(formatting.RuleDescriptor.create1(18 /* CloseBraceToken */, 106 /* WhileKeyword */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.NoSpaceAfterCloseBrace = new formatting.Rule(formatting.RuleDescriptor.create3(18 /* CloseBraceToken */, formatting.Shared.TokenRange.FromTokens([22 /* CloseBracketToken */, 26 /* CommaToken */, 25 /* SemicolonToken */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                // No space for dot
+                this.NoSpaceBeforeDot = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 23 /* DotToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceAfterDot = new formatting.Rule(formatting.RuleDescriptor.create3(23 /* DotToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                // No space before and after indexer
+                this.NoSpaceBeforeOpenBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.AnyExcept(120 /* AsyncKeyword */), 21 /* OpenBracketToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceAfterCloseBracket = new formatting.Rule(formatting.RuleDescriptor.create3(22 /* CloseBracketToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBeforeBlockInFunctionDeclarationContext), 8 /* Delete */));
+                // Place a space before open brace in a function declaration
+                this.FunctionOpenBraceLeftTokenRange = formatting.Shared.TokenRange.AnyIncludingMultilineComments;
+                this.SpaceBeforeOpenBraceInFunction = new formatting.Rule(formatting.RuleDescriptor.create2(this.FunctionOpenBraceLeftTokenRange, 17 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext, Rules.IsBeforeBlockContext, Rules.IsNotFormatOnEnter, Rules.IsSameLineTokenOrBeforeMultilineBlockContext), 2 /* Space */), 1 /* CanDeleteNewLines */);
+                // Place a space before open brace in a TypeScript declaration that has braces as children (class, module, enum, etc)
+                this.TypeScriptOpenBraceLeftTokenRange = formatting.Shared.TokenRange.FromTokens([71 /* Identifier */, 3 /* MultiLineCommentTrivia */, 75 /* ClassKeyword */, 84 /* ExportKeyword */, 91 /* ImportKeyword */]);
+                this.SpaceBeforeOpenBraceInTypeScriptDeclWithBlock = new formatting.Rule(formatting.RuleDescriptor.create2(this.TypeScriptOpenBraceLeftTokenRange, 17 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsTypeScriptDeclWithBlockContext, Rules.IsNotFormatOnEnter, Rules.IsSameLineTokenOrBeforeMultilineBlockContext), 2 /* Space */), 1 /* CanDeleteNewLines */);
+                // Place a space before open brace in a control flow construct
+                this.ControlOpenBraceLeftTokenRange = formatting.Shared.TokenRange.FromTokens([20 /* CloseParenToken */, 3 /* MultiLineCommentTrivia */, 81 /* DoKeyword */, 102 /* TryKeyword */, 87 /* FinallyKeyword */, 82 /* ElseKeyword */]);
+                this.SpaceBeforeOpenBraceInControl = new formatting.Rule(formatting.RuleDescriptor.create2(this.ControlOpenBraceLeftTokenRange, 17 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsControlDeclContext, Rules.IsNotFormatOnEnter, Rules.IsSameLineTokenOrBeforeMultilineBlockContext), 2 /* Space */), 1 /* CanDeleteNewLines */);
+                // Insert a space after { and before } in single-line contexts, but remove space from empty object literals {}.
+                this.SpaceAfterOpenBrace = new formatting.Rule(formatting.RuleDescriptor.create3(17 /* OpenBraceToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionEnabledOrUndefined("insertSpaceAfterOpeningAndBeforeClosingNonemptyBraces"), Rules.IsBraceWrappedContext), 2 /* Space */));
+                this.SpaceBeforeCloseBrace = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 18 /* CloseBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionEnabledOrUndefined("insertSpaceAfterOpeningAndBeforeClosingNonemptyBraces"), Rules.IsBraceWrappedContext), 2 /* Space */));
+                this.NoSpaceAfterOpenBrace = new formatting.Rule(formatting.RuleDescriptor.create3(17 /* OpenBraceToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionDisabled("insertSpaceAfterOpeningAndBeforeClosingNonemptyBraces"), Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceBeforeCloseBrace = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 18 /* CloseBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionDisabled("insertSpaceAfterOpeningAndBeforeClosingNonemptyBraces"), Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceBetweenEmptyBraceBrackets = new formatting.Rule(formatting.RuleDescriptor.create1(17 /* OpenBraceToken */, 18 /* CloseBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsObjectContext), 8 /* Delete */));
+                // Insert new line after { and before } in multi-line contexts.
+                this.NewLineAfterOpenBraceInBlockContext = new formatting.Rule(formatting.RuleDescriptor.create3(17 /* OpenBraceToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsMultilineBlockContext), 4 /* NewLine */));
+                // For functions and control block place } on a new line    [multi-line rule]
+                this.NewLineBeforeCloseBraceInBlockContext = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.AnyIncludingMultilineComments, 18 /* CloseBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsMultilineBlockContext), 4 /* NewLine */));
+                // Special handling of unary operators.
+                // Prefix operators generally shouldn't have a space between
+                // them and their target unary expression.
+                this.NoSpaceAfterUnaryPrefixOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.UnaryPrefixOperators, formatting.Shared.TokenRange.UnaryPrefixExpressions), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 8 /* Delete */));
+                this.NoSpaceAfterUnaryPreincrementOperator = new formatting.Rule(formatting.RuleDescriptor.create3(43 /* PlusPlusToken */, formatting.Shared.TokenRange.UnaryPreincrementExpressions), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceAfterUnaryPredecrementOperator = new formatting.Rule(formatting.RuleDescriptor.create3(44 /* MinusMinusToken */, formatting.Shared.TokenRange.UnaryPredecrementExpressions), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceBeforeUnaryPostincrementOperator = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.UnaryPostincrementExpressions, 43 /* PlusPlusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceBeforeUnaryPostdecrementOperator = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.UnaryPostdecrementExpressions, 44 /* MinusMinusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                // More unary operator special-casing.
+                // DevDiv 181814:  Be careful when removing leading whitespace
+                // around unary operators.  Examples:
+                //      1 - -2  --X-->  1--2
+                //      a + ++b --X-->  a+++b
+                this.SpaceAfterPostincrementWhenFollowedByAdd = new formatting.Rule(formatting.RuleDescriptor.create1(43 /* PlusPlusToken */, 37 /* PlusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
+                this.SpaceAfterAddWhenFollowedByUnaryPlus = new formatting.Rule(formatting.RuleDescriptor.create1(37 /* PlusToken */, 37 /* PlusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
+                this.SpaceAfterAddWhenFollowedByPreincrement = new formatting.Rule(formatting.RuleDescriptor.create1(37 /* PlusToken */, 43 /* PlusPlusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
+                this.SpaceAfterPostdecrementWhenFollowedBySubtract = new formatting.Rule(formatting.RuleDescriptor.create1(44 /* MinusMinusToken */, 38 /* MinusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
+                this.SpaceAfterSubtractWhenFollowedByUnaryMinus = new formatting.Rule(formatting.RuleDescriptor.create1(38 /* MinusToken */, 38 /* MinusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
+                this.SpaceAfterSubtractWhenFollowedByPredecrement = new formatting.Rule(formatting.RuleDescriptor.create1(38 /* MinusToken */, 44 /* MinusMinusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
+                this.NoSpaceBeforeComma = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 26 /* CommaToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.SpaceAfterCertainKeywords = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([104 /* VarKeyword */, 100 /* ThrowKeyword */, 94 /* NewKeyword */, 80 /* DeleteKeyword */, 96 /* ReturnKeyword */, 103 /* TypeOfKeyword */, 121 /* AwaitKeyword */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.NoSpaceAfterNewKeywordOnConstructorSignature = new formatting.Rule(formatting.RuleDescriptor.create1(94 /* NewKeyword */, 19 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsConstructorSignatureContext), 8 /* Delete */));
+                this.SpaceAfterLetConstInVariableDeclaration = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([110 /* LetKeyword */, 76 /* ConstKeyword */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsStartOfVariableDeclarationList), 2 /* Space */));
+                this.NoSpaceBeforeOpenParenInFuncCall = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 19 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsFunctionCallOrNewContext, Rules.IsPreviousTokenNotComma), 8 /* Delete */));
+                this.SpaceAfterFunctionInFuncDecl = new formatting.Rule(formatting.RuleDescriptor.create3(89 /* FunctionKeyword */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext), 2 /* Space */));
+                this.SpaceBeforeOpenParenInFuncDecl = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 19 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionEnabled("insertSpaceBeforeFunctionParenthesis"), Rules.IsNonJsxSameLineTokenContext, Rules.IsFunctionDeclContext), 2 /* Space */));
+                this.NoSpaceBeforeOpenParenInFuncDecl = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 19 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceBeforeFunctionParenthesis"), Rules.IsNonJsxSameLineTokenContext, Rules.IsFunctionDeclContext), 8 /* Delete */));
+                this.SpaceAfterVoidOperator = new formatting.Rule(formatting.RuleDescriptor.create3(105 /* VoidKeyword */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsVoidOpContext), 2 /* Space */));
+                this.NoSpaceBetweenReturnAndSemicolon = new formatting.Rule(formatting.RuleDescriptor.create1(96 /* ReturnKeyword */, 25 /* SemicolonToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                // Add a space between statements. All keywords except (do,else,case) has open/close parens after them.
+                // So, we have a rule to add a space for [),Any], [do,Any], [else,Any], and [case,Any]
+                this.SpaceBetweenStatements = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([20 /* CloseParenToken */, 81 /* DoKeyword */, 82 /* ElseKeyword */, 73 /* CaseKeyword */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNonJsxElementContext, Rules.IsNotForContext), 2 /* Space */));
+                // This low-pri rule takes care of "try {" and "finally {" in case the rule SpaceBeforeOpenBraceInControl didn't execute on FormatOnEnter.
+                this.SpaceAfterTryFinally = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.FromTokens([102 /* TryKeyword */, 87 /* FinallyKeyword */]), 17 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                //      get x() {}
+                //      set x(val) {}
+                this.SpaceAfterGetSetInMember = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.FromTokens([125 /* GetKeyword */, 135 /* SetKeyword */]), 71 /* Identifier */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext), 2 /* Space */));
+                // Special case for binary operators (that are keywords). For these we have to add a space and shouldn't follow any user options.
+                this.SpaceBeforeBinaryKeywordOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.BinaryKeywordOperators), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
+                this.SpaceAfterBinaryKeywordOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.BinaryKeywordOperators, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
+                // TypeScript-specific higher priority rules
+                this.SpaceAfterConstructor = new formatting.Rule(formatting.RuleDescriptor.create1(123 /* ConstructorKeyword */, 19 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionEnabled("insertSpaceAfterConstructor"), Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.NoSpaceAfterConstructor = new formatting.Rule(formatting.RuleDescriptor.create1(123 /* ConstructorKeyword */, 19 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceAfterConstructor"), Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                // Use of module as a function call. e.g.: import m2 = module("m2");
+                this.NoSpaceAfterModuleImport = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.FromTokens([128 /* ModuleKeyword */, 132 /* RequireKeyword */]), 19 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                // Add a space around certain TypeScript keywords
+                this.SpaceAfterCertainTypeScriptKeywords = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([117 /* AbstractKeyword */, 75 /* ClassKeyword */, 124 /* DeclareKeyword */, 79 /* DefaultKeyword */, 83 /* EnumKeyword */, 84 /* ExportKeyword */, 85 /* ExtendsKeyword */, 125 /* GetKeyword */, 108 /* ImplementsKeyword */, 91 /* ImportKeyword */, 109 /* InterfaceKeyword */, 128 /* ModuleKeyword */, 129 /* NamespaceKeyword */, 112 /* PrivateKeyword */, 114 /* PublicKeyword */, 113 /* ProtectedKeyword */, 131 /* ReadonlyKeyword */, 135 /* SetKeyword */, 115 /* StaticKeyword */, 138 /* TypeKeyword */, 140 /* FromKeyword */, 127 /* KeyOfKeyword */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.SpaceBeforeCertainTypeScriptKeywords = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.FromTokens([85 /* ExtendsKeyword */, 108 /* ImplementsKeyword */, 140 /* FromKeyword */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                // Treat string literals in module names as identifiers, and add a space between the literal and the opening Brace braces, e.g.: module "m2" {
+                this.SpaceAfterModuleName = new formatting.Rule(formatting.RuleDescriptor.create1(9 /* StringLiteral */, 17 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsModuleDeclContext), 2 /* Space */));
+                // Lambda expressions
+                this.SpaceBeforeArrow = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 36 /* EqualsGreaterThanToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.SpaceAfterArrow = new formatting.Rule(formatting.RuleDescriptor.create3(36 /* EqualsGreaterThanToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                // Optional parameters and let args
+                this.NoSpaceAfterEllipsis = new formatting.Rule(formatting.RuleDescriptor.create1(24 /* DotDotDotToken */, 71 /* Identifier */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceAfterOptionalParameters = new formatting.Rule(formatting.RuleDescriptor.create3(55 /* QuestionToken */, formatting.Shared.TokenRange.FromTokens([20 /* CloseParenToken */, 26 /* CommaToken */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 8 /* Delete */));
+                // generics and type assertions
+                this.NoSpaceBeforeOpenAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.TypeNames, 27 /* LessThanToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8 /* Delete */));
+                this.NoSpaceBetweenCloseParenAndAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create1(20 /* CloseParenToken */, 27 /* LessThanToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8 /* Delete */));
+                this.NoSpaceAfterOpenAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create3(27 /* LessThanToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8 /* Delete */));
+                this.NoSpaceBeforeCloseAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 29 /* GreaterThanToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8 /* Delete */));
+                this.NoSpaceAfterCloseAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create3(29 /* GreaterThanToken */, formatting.Shared.TokenRange.FromTokens([19 /* OpenParenToken */, 21 /* OpenBracketToken */, 29 /* GreaterThanToken */, 26 /* CommaToken */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8 /* Delete */));
+                // Remove spaces in empty interface literals. e.g.: x: {}
+                this.NoSpaceBetweenEmptyInterfaceBraceBrackets = new formatting.Rule(formatting.RuleDescriptor.create1(17 /* OpenBraceToken */, 18 /* CloseBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsObjectTypeContext), 8 /* Delete */));
+                // decorators
+                this.SpaceBeforeAt = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 57 /* AtToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.NoSpaceAfterAt = new formatting.Rule(formatting.RuleDescriptor.create3(57 /* AtToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.SpaceAfterDecorator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.FromTokens([117 /* AbstractKeyword */, 71 /* Identifier */, 84 /* ExportKeyword */, 79 /* DefaultKeyword */, 75 /* ClassKeyword */, 115 /* StaticKeyword */, 114 /* PublicKeyword */, 112 /* PrivateKeyword */, 113 /* ProtectedKeyword */, 125 /* GetKeyword */, 135 /* SetKeyword */, 21 /* OpenBracketToken */, 39 /* AsteriskToken */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsEndOfDecoratorContextOnSameLine), 2 /* Space */));
+                this.NoSpaceBetweenFunctionKeywordAndStar = new formatting.Rule(formatting.RuleDescriptor.create1(89 /* FunctionKeyword */, 39 /* AsteriskToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclarationOrFunctionExpressionContext), 8 /* Delete */));
+                this.SpaceAfterStarInGeneratorDeclaration = new formatting.Rule(formatting.RuleDescriptor.create3(39 /* AsteriskToken */, formatting.Shared.TokenRange.FromTokens([71 /* Identifier */, 19 /* OpenParenToken */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclarationOrFunctionExpressionContext), 2 /* Space */));
+                this.NoSpaceBetweenYieldKeywordAndStar = new formatting.Rule(formatting.RuleDescriptor.create1(116 /* YieldKeyword */, 39 /* AsteriskToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsYieldOrYieldStarWithOperand), 8 /* Delete */));
+                this.SpaceBetweenYieldOrYieldStarAndOperand = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([116 /* YieldKeyword */, 39 /* AsteriskToken */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsYieldOrYieldStarWithOperand), 2 /* Space */));
+                // Async-await
+                this.SpaceBetweenAsyncAndOpenParen = new formatting.Rule(formatting.RuleDescriptor.create1(120 /* AsyncKeyword */, 19 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsArrowFunctionContext, Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.SpaceBetweenAsyncAndFunctionKeyword = new formatting.Rule(formatting.RuleDescriptor.create1(120 /* AsyncKeyword */, 89 /* FunctionKeyword */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                // template string
+                this.NoSpaceBetweenTagAndTemplateString = new formatting.Rule(formatting.RuleDescriptor.create3(71 /* Identifier */, formatting.Shared.TokenRange.FromTokens([13 /* NoSubstitutionTemplateLiteral */, 14 /* TemplateHead */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                // jsx opening element
+                this.SpaceBeforeJsxAttribute = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 71 /* Identifier */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNextTokenParentJsxAttribute, Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.SpaceBeforeSlashInJsxOpeningElement = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 41 /* SlashToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsJsxSelfClosingElementContext, Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.NoSpaceBeforeGreaterThanTokenInJsxOpeningElement = new formatting.Rule(formatting.RuleDescriptor.create1(41 /* SlashToken */, 29 /* GreaterThanToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsJsxSelfClosingElementContext, Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceBeforeEqualInJsxAttribute = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 58 /* EqualsToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsJsxAttributeContext, Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceAfterEqualInJsxAttribute = new formatting.Rule(formatting.RuleDescriptor.create3(58 /* EqualsToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsJsxAttributeContext, Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                // No space before non-null assertion operator
+                this.NoSpaceBeforeNonNullAssertionOperator = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 51 /* ExclamationToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNonNullAssertionContext), 8 /* Delete */));
+                ///
+                /// Rules controlled by user options
+                ///
+                // Insert space after comma delimiter
+                this.SpaceAfterComma = new formatting.Rule(formatting.RuleDescriptor.create3(26 /* CommaToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionEnabled("insertSpaceAfterCommaDelimiter"), Rules.IsNonJsxSameLineTokenContext, Rules.IsNonJsxElementContext, Rules.IsNextTokenNotCloseBracket), 2 /* Space */));
+                this.NoSpaceAfterComma = new formatting.Rule(formatting.RuleDescriptor.create3(26 /* CommaToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceAfterCommaDelimiter"), Rules.IsNonJsxSameLineTokenContext, Rules.IsNonJsxElementContext), 8 /* Delete */));
+                // Insert space before and after binary operators
+                this.SpaceBeforeBinaryOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.BinaryOperators), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionEnabled("insertSpaceBeforeAndAfterBinaryOperators"), Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
+                this.SpaceAfterBinaryOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.BinaryOperators, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionEnabled("insertSpaceBeforeAndAfterBinaryOperators"), Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
+                this.NoSpaceBeforeBinaryOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.BinaryOperators), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceBeforeAndAfterBinaryOperators"), Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 8 /* Delete */));
+                this.NoSpaceAfterBinaryOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.BinaryOperators, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceBeforeAndAfterBinaryOperators"), Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 8 /* Delete */));
+                // Insert space after keywords in control flow statements
+                this.SpaceAfterKeywordInControl = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Keywords, 19 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionEnabled("insertSpaceAfterKeywordsInControlFlowStatements"), Rules.IsControlDeclContext), 2 /* Space */));
+                this.NoSpaceAfterKeywordInControl = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Keywords, 19 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceAfterKeywordsInControlFlowStatements"), Rules.IsControlDeclContext), 8 /* Delete */));
+                // Open Brace braces after function
+                // TypeScript: Function can have return types, which can be made of tons of different token kinds
+                this.NewLineBeforeOpenBraceInFunction = new formatting.Rule(formatting.RuleDescriptor.create2(this.FunctionOpenBraceLeftTokenRange, 17 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionEnabled("placeOpenBraceOnNewLineForFunctions"), Rules.IsFunctionDeclContext, Rules.IsBeforeMultilineBlockContext), 4 /* NewLine */), 1 /* CanDeleteNewLines */);
+                // Open Brace braces after TypeScript module/class/interface
+                this.NewLineBeforeOpenBraceInTypeScriptDeclWithBlock = new formatting.Rule(formatting.RuleDescriptor.create2(this.TypeScriptOpenBraceLeftTokenRange, 17 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionEnabled("placeOpenBraceOnNewLineForFunctions"), Rules.IsTypeScriptDeclWithBlockContext, Rules.IsBeforeMultilineBlockContext), 4 /* NewLine */), 1 /* CanDeleteNewLines */);
+                // Open Brace braces after control block
+                this.NewLineBeforeOpenBraceInControl = new formatting.Rule(formatting.RuleDescriptor.create2(this.ControlOpenBraceLeftTokenRange, 17 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionEnabled("placeOpenBraceOnNewLineForControlBlocks"), Rules.IsControlDeclContext, Rules.IsBeforeMultilineBlockContext), 4 /* NewLine */), 1 /* CanDeleteNewLines */);
+                // Insert space after semicolon in for statement
+                this.SpaceAfterSemicolonInFor = new formatting.Rule(formatting.RuleDescriptor.create3(25 /* SemicolonToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionEnabled("insertSpaceAfterSemicolonInForStatements"), Rules.IsNonJsxSameLineTokenContext, Rules.IsForContext), 2 /* Space */));
+                this.NoSpaceAfterSemicolonInFor = new formatting.Rule(formatting.RuleDescriptor.create3(25 /* SemicolonToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceAfterSemicolonInForStatements"), Rules.IsNonJsxSameLineTokenContext, Rules.IsForContext), 8 /* Delete */));
+                // Insert space after opening and before closing nonempty parenthesis
+                this.SpaceAfterOpenParen = new formatting.Rule(formatting.RuleDescriptor.create3(19 /* OpenParenToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionEnabled("insertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis"), Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.SpaceBeforeCloseParen = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 20 /* CloseParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionEnabled("insertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis"), Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.NoSpaceBetweenParens = new formatting.Rule(formatting.RuleDescriptor.create1(19 /* OpenParenToken */, 20 /* CloseParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceAfterOpenParen = new formatting.Rule(formatting.RuleDescriptor.create3(19 /* OpenParenToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis"), Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceBeforeCloseParen = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 20 /* CloseParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis"), Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                // Insert space after opening and before closing nonempty brackets
+                this.SpaceAfterOpenBracket = new formatting.Rule(formatting.RuleDescriptor.create3(21 /* OpenBracketToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionEnabled("insertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets"), Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.SpaceBeforeCloseBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 22 /* CloseBracketToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionEnabled("insertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets"), Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.NoSpaceBetweenBrackets = new formatting.Rule(formatting.RuleDescriptor.create1(21 /* OpenBracketToken */, 22 /* CloseBracketToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceAfterOpenBracket = new formatting.Rule(formatting.RuleDescriptor.create3(21 /* OpenBracketToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets"), Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceBeforeCloseBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 22 /* CloseBracketToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets"), Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                // Insert space after opening and before closing template string braces
+                this.NoSpaceAfterTemplateHeadAndMiddle = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([14 /* TemplateHead */, 15 /* TemplateMiddle */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces"), Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.SpaceAfterTemplateHeadAndMiddle = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([14 /* TemplateHead */, 15 /* TemplateMiddle */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionEnabled("insertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces"), Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.NoSpaceBeforeTemplateMiddleAndTail = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.FromTokens([15 /* TemplateMiddle */, 16 /* TemplateTail */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces"), Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.SpaceBeforeTemplateMiddleAndTail = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.FromTokens([15 /* TemplateMiddle */, 16 /* TemplateTail */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionEnabled("insertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces"), Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                // No space after { and before } in JSX expression
+                this.NoSpaceAfterOpenBraceInJsxExpression = new formatting.Rule(formatting.RuleDescriptor.create3(17 /* OpenBraceToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceAfterOpeningAndBeforeClosingJsxExpressionBraces"), Rules.IsNonJsxSameLineTokenContext, Rules.IsJsxExpressionContext), 8 /* Delete */));
+                this.SpaceAfterOpenBraceInJsxExpression = new formatting.Rule(formatting.RuleDescriptor.create3(17 /* OpenBraceToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionEnabled("insertSpaceAfterOpeningAndBeforeClosingJsxExpressionBraces"), Rules.IsNonJsxSameLineTokenContext, Rules.IsJsxExpressionContext), 2 /* Space */));
+                this.NoSpaceBeforeCloseBraceInJsxExpression = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 18 /* CloseBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceAfterOpeningAndBeforeClosingJsxExpressionBraces"), Rules.IsNonJsxSameLineTokenContext, Rules.IsJsxExpressionContext), 8 /* Delete */));
+                this.SpaceBeforeCloseBraceInJsxExpression = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 18 /* CloseBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionEnabled("insertSpaceAfterOpeningAndBeforeClosingJsxExpressionBraces"), Rules.IsNonJsxSameLineTokenContext, Rules.IsJsxExpressionContext), 2 /* Space */));
+                // Insert space after function keyword for anonymous functions
+                this.SpaceAfterAnonymousFunctionKeyword = new formatting.Rule(formatting.RuleDescriptor.create1(89 /* FunctionKeyword */, 19 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionEnabled("insertSpaceAfterFunctionKeywordForAnonymousFunctions"), Rules.IsFunctionDeclContext), 2 /* Space */));
+                this.NoSpaceAfterAnonymousFunctionKeyword = new formatting.Rule(formatting.RuleDescriptor.create1(89 /* FunctionKeyword */, 19 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceAfterFunctionKeywordForAnonymousFunctions"), Rules.IsFunctionDeclContext), 8 /* Delete */));
+                // No space after type assertion
+                this.NoSpaceAfterTypeAssertion = new formatting.Rule(formatting.RuleDescriptor.create3(29 /* GreaterThanToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceAfterTypeAssertion"), Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeAssertionContext), 8 /* Delete */));
+                this.SpaceAfterTypeAssertion = new formatting.Rule(formatting.RuleDescriptor.create3(29 /* GreaterThanToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionEnabled("insertSpaceAfterTypeAssertion"), Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeAssertionContext), 2 /* Space */));
+                // These rules are higher in priority than user-configurable rules.
+                this.HighPriorityCommonRules = [
+                    this.IgnoreBeforeComment, this.IgnoreAfterLineComment,
+                    this.NoSpaceBeforeColon, this.SpaceAfterColon, this.NoSpaceBeforeQuestionMark, this.SpaceAfterQuestionMarkInConditionalOperator,
+                    this.NoSpaceAfterQuestionMark,
+                    this.NoSpaceBeforeDot, this.NoSpaceAfterDot,
+                    this.NoSpaceAfterUnaryPrefixOperator,
+                    this.NoSpaceAfterUnaryPreincrementOperator, this.NoSpaceAfterUnaryPredecrementOperator,
+                    this.NoSpaceBeforeUnaryPostincrementOperator, this.NoSpaceBeforeUnaryPostdecrementOperator,
+                    this.SpaceAfterPostincrementWhenFollowedByAdd,
+                    this.SpaceAfterAddWhenFollowedByUnaryPlus, this.SpaceAfterAddWhenFollowedByPreincrement,
+                    this.SpaceAfterPostdecrementWhenFollowedBySubtract,
+                    this.SpaceAfterSubtractWhenFollowedByUnaryMinus, this.SpaceAfterSubtractWhenFollowedByPredecrement,
+                    this.NoSpaceAfterCloseBrace,
+                    this.NewLineBeforeCloseBraceInBlockContext,
+                    this.SpaceAfterCloseBrace, this.SpaceBetweenCloseBraceAndElse, this.SpaceBetweenCloseBraceAndWhile, this.NoSpaceBetweenEmptyBraceBrackets,
+                    this.NoSpaceBetweenFunctionKeywordAndStar, this.SpaceAfterStarInGeneratorDeclaration,
+                    this.SpaceAfterFunctionInFuncDecl, this.NewLineAfterOpenBraceInBlockContext, this.SpaceAfterGetSetInMember,
+                    this.NoSpaceBetweenYieldKeywordAndStar, this.SpaceBetweenYieldOrYieldStarAndOperand,
+                    this.NoSpaceBetweenReturnAndSemicolon,
+                    this.SpaceAfterCertainKeywords,
+                    this.SpaceAfterLetConstInVariableDeclaration,
+                    this.NoSpaceBeforeOpenParenInFuncCall,
+                    this.SpaceBeforeBinaryKeywordOperator, this.SpaceAfterBinaryKeywordOperator,
+                    this.SpaceAfterVoidOperator,
+                    this.SpaceBetweenAsyncAndOpenParen, this.SpaceBetweenAsyncAndFunctionKeyword,
+                    this.NoSpaceBetweenTagAndTemplateString,
+                    this.SpaceBeforeJsxAttribute, this.SpaceBeforeSlashInJsxOpeningElement, this.NoSpaceBeforeGreaterThanTokenInJsxOpeningElement,
+                    this.NoSpaceBeforeEqualInJsxAttribute, this.NoSpaceAfterEqualInJsxAttribute,
+                    // TypeScript-specific rules
+                    this.NoSpaceAfterModuleImport,
+                    this.SpaceAfterCertainTypeScriptKeywords, this.SpaceBeforeCertainTypeScriptKeywords,
+                    this.SpaceAfterModuleName,
+                    this.SpaceBeforeArrow, this.SpaceAfterArrow,
+                    this.NoSpaceAfterEllipsis,
+                    this.NoSpaceAfterOptionalParameters,
+                    this.NoSpaceBetweenEmptyInterfaceBraceBrackets,
+                    this.NoSpaceBeforeOpenAngularBracket,
+                    this.NoSpaceBetweenCloseParenAndAngularBracket,
+                    this.NoSpaceAfterOpenAngularBracket,
+                    this.NoSpaceBeforeCloseAngularBracket,
+                    this.NoSpaceAfterCloseAngularBracket,
+                    this.SpaceBeforeAt,
+                    this.NoSpaceAfterAt,
+                    this.SpaceAfterDecorator,
+                    this.NoSpaceBeforeNonNullAssertionOperator,
+                    this.NoSpaceAfterNewKeywordOnConstructorSignature
+                ];
+                // These rules are applied after high priority rules.
+                this.UserConfigurableRules = [
+                    this.SpaceAfterConstructor, this.NoSpaceAfterConstructor,
+                    this.SpaceAfterComma, this.NoSpaceAfterComma,
+                    this.SpaceAfterAnonymousFunctionKeyword, this.NoSpaceAfterAnonymousFunctionKeyword,
+                    this.SpaceAfterKeywordInControl, this.NoSpaceAfterKeywordInControl,
+                    this.SpaceAfterOpenParen, this.SpaceBeforeCloseParen, this.NoSpaceBetweenParens, this.NoSpaceAfterOpenParen, this.NoSpaceBeforeCloseParen,
+                    this.SpaceAfterOpenBracket, this.SpaceBeforeCloseBracket, this.NoSpaceBetweenBrackets, this.NoSpaceAfterOpenBracket, this.NoSpaceBeforeCloseBracket,
+                    this.SpaceAfterOpenBrace, this.SpaceBeforeCloseBrace, this.NoSpaceBetweenEmptyBraceBrackets, this.NoSpaceAfterOpenBrace, this.NoSpaceBeforeCloseBrace,
+                    this.SpaceAfterTemplateHeadAndMiddle, this.SpaceBeforeTemplateMiddleAndTail, this.NoSpaceAfterTemplateHeadAndMiddle, this.NoSpaceBeforeTemplateMiddleAndTail,
+                    this.SpaceAfterOpenBraceInJsxExpression, this.SpaceBeforeCloseBraceInJsxExpression, this.NoSpaceAfterOpenBraceInJsxExpression, this.NoSpaceBeforeCloseBraceInJsxExpression,
+                    this.SpaceAfterSemicolonInFor, this.NoSpaceAfterSemicolonInFor,
+                    this.SpaceBeforeBinaryOperator, this.SpaceAfterBinaryOperator, this.NoSpaceBeforeBinaryOperator, this.NoSpaceAfterBinaryOperator,
+                    this.SpaceBeforeOpenParenInFuncDecl, this.NoSpaceBeforeOpenParenInFuncDecl,
+                    this.NewLineBeforeOpenBraceInControl,
+                    this.NewLineBeforeOpenBraceInFunction, this.NewLineBeforeOpenBraceInTypeScriptDeclWithBlock,
+                    this.SpaceAfterTypeAssertion, this.NoSpaceAfterTypeAssertion
+                ];
+                // These rules are lower in priority than user-configurable rules.
+                this.LowPriorityCommonRules = [
+                    this.NoSpaceBeforeSemicolon,
+                    this.SpaceBeforeOpenBraceInControl, this.SpaceBeforeOpenBraceInFunction, this.SpaceBeforeOpenBraceInTypeScriptDeclWithBlock,
+                    this.NoSpaceBeforeComma,
+                    this.NoSpaceBeforeOpenBracket,
+                    this.NoSpaceAfterCloseBracket,
+                    this.SpaceAfterSemicolon,
+                    this.SpaceBetweenStatements, this.SpaceAfterTryFinally
+                ];
+            }
+            Rules.prototype.getRuleName = function (rule) {
+                var o = this;
+                for (var name_69 in o) {
+                    if (o[name_69] === rule) {
+                        return name_69;
+                    }
+                }
+                throw new Error("Unknown rule");
+            };
+            ///
+            /// Contexts
+            ///
+            Rules.IsOptionEnabled = function (optionName) {
+                return function (context) { return context.options && context.options.hasOwnProperty(optionName) && !!context.options[optionName]; };
+            };
+            Rules.IsOptionDisabled = function (optionName) {
+                return function (context) { return context.options && context.options.hasOwnProperty(optionName) && !context.options[optionName]; };
+            };
+            Rules.IsOptionDisabledOrUndefined = function (optionName) {
+                return function (context) { return !context.options || !context.options.hasOwnProperty(optionName) || !context.options[optionName]; };
+            };
+            Rules.IsOptionEnabledOrUndefined = function (optionName) {
+                return function (context) { return !context.options || !context.options.hasOwnProperty(optionName) || !!context.options[optionName]; };
+            };
+            Rules.IsForContext = function (context) {
+                return context.contextNode.kind === 214 /* ForStatement */;
+            };
+            Rules.IsNotForContext = function (context) {
+                return !Rules.IsForContext(context);
+            };
+            Rules.IsBinaryOpContext = function (context) {
+                switch (context.contextNode.kind) {
+                    case 194 /* BinaryExpression */:
+                    case 195 /* ConditionalExpression */:
+                    case 202 /* AsExpression */:
+                    case 246 /* ExportSpecifier */:
+                    case 242 /* ImportSpecifier */:
+                    case 158 /* TypePredicate */:
+                    case 166 /* UnionType */:
+                    case 167 /* IntersectionType */:
+                        return true;
+                    // equals in binding elements: function foo([[x, y] = [1, 2]])
+                    case 176 /* BindingElement */:
+                    // equals in type X = ...
+                    case 231 /* TypeAliasDeclaration */:
+                    // equal in import a = module('a');
+                    case 237 /* ImportEqualsDeclaration */:
+                    // equal in let a = 0;
+                    case 226 /* VariableDeclaration */:
+                    // equal in p = 0;
+                    case 146 /* Parameter */:
+                    case 264 /* EnumMember */:
+                    case 149 /* PropertyDeclaration */:
+                    case 148 /* PropertySignature */:
+                        return context.currentTokenSpan.kind === 58 /* EqualsToken */ || context.nextTokenSpan.kind === 58 /* EqualsToken */;
+                    // "in" keyword in for (let x in []) { }
+                    case 215 /* ForInStatement */:
+                    // "in" keyword in [P in keyof T]: T[P]
+                    case 145 /* TypeParameter */:
+                        return context.currentTokenSpan.kind === 92 /* InKeyword */ || context.nextTokenSpan.kind === 92 /* InKeyword */;
+                    // Technically, "of" is not a binary operator, but format it the same way as "in"
+                    case 216 /* ForOfStatement */:
+                        return context.currentTokenSpan.kind === 142 /* OfKeyword */ || context.nextTokenSpan.kind === 142 /* OfKeyword */;
+                }
+                return false;
+            };
+            Rules.IsNotBinaryOpContext = function (context) {
+                return !Rules.IsBinaryOpContext(context);
+            };
+            Rules.IsConditionalOperatorContext = function (context) {
+                return context.contextNode.kind === 195 /* ConditionalExpression */;
+            };
+            Rules.IsSameLineTokenOrBeforeMultilineBlockContext = function (context) {
+                //// This check is mainly used inside SpaceBeforeOpenBraceInControl and SpaceBeforeOpenBraceInFunction.
+                ////
+                //// Ex:
+                //// if (1)     { ....
+                ////      * ) and { are on the same line so apply the rule. Here we don't care whether it's same or multi block context
+                ////
+                //// Ex:
+                //// if (1)
+                //// { ... }
+                ////      * ) and { are on different lines. We only need to format if the block is multiline context. So in this case we don't format.
+                ////
+                //// Ex:
+                //// if (1)
+                //// { ...
+                //// }
+                ////      * ) and { are on different lines. We only need to format if the block is multiline context. So in this case we format.
+                return context.TokensAreOnSameLine() || Rules.IsBeforeMultilineBlockContext(context);
+            };
+            Rules.IsBraceWrappedContext = function (context) {
+                return context.contextNode.kind === 174 /* ObjectBindingPattern */ || Rules.IsSingleLineBlockContext(context);
+            };
+            // This check is done before an open brace in a control construct, a function, or a typescript block declaration
+            Rules.IsBeforeMultilineBlockContext = function (context) {
+                return Rules.IsBeforeBlockContext(context) && !(context.NextNodeAllOnSameLine() || context.NextNodeBlockIsOnOneLine());
+            };
+            Rules.IsMultilineBlockContext = function (context) {
+                return Rules.IsBlockContext(context) && !(context.ContextNodeAllOnSameLine() || context.ContextNodeBlockIsOnOneLine());
+            };
+            Rules.IsSingleLineBlockContext = function (context) {
+                return Rules.IsBlockContext(context) && (context.ContextNodeAllOnSameLine() || context.ContextNodeBlockIsOnOneLine());
+            };
+            Rules.IsBlockContext = function (context) {
+                return Rules.NodeIsBlockContext(context.contextNode);
+            };
+            Rules.IsBeforeBlockContext = function (context) {
+                return Rules.NodeIsBlockContext(context.nextTokenParent);
+            };
+            // IMPORTANT!!! This method must return true ONLY for nodes with open and close braces as immediate children
+            Rules.NodeIsBlockContext = function (node) {
+                if (Rules.NodeIsTypeScriptDeclWithBlockContext(node)) {
+                    // This means we are in a context that looks like a block to the user, but in the grammar is actually not a node (it's a class, module, enum, object type literal, etc).
+                    return true;
+                }
+                switch (node.kind) {
+                    case 207 /* Block */:
+                    case 235 /* CaseBlock */:
+                    case 178 /* ObjectLiteralExpression */:
+                    case 234 /* ModuleBlock */:
+                        return true;
+                }
+                return false;
+            };
+            Rules.IsFunctionDeclContext = function (context) {
+                switch (context.contextNode.kind) {
+                    case 228 /* FunctionDeclaration */:
+                    case 151 /* MethodDeclaration */:
+                    case 150 /* MethodSignature */:
+                    // case SyntaxKind.MemberFunctionDeclaration:
+                    case 153 /* GetAccessor */:
+                    case 154 /* SetAccessor */:
+                    // case SyntaxKind.MethodSignature:
+                    case 155 /* CallSignature */:
+                    case 186 /* FunctionExpression */:
+                    case 152 /* Constructor */:
+                    case 187 /* ArrowFunction */:
+                    // case SyntaxKind.ConstructorDeclaration:
+                    // case SyntaxKind.SimpleArrowFunctionExpression:
+                    // case SyntaxKind.ParenthesizedArrowFunctionExpression:
+                    case 230 /* InterfaceDeclaration */:
+                        return true;
+                }
+                return false;
+            };
+            Rules.IsFunctionDeclarationOrFunctionExpressionContext = function (context) {
+                return context.contextNode.kind === 228 /* FunctionDeclaration */ || context.contextNode.kind === 186 /* FunctionExpression */;
+            };
+            Rules.IsTypeScriptDeclWithBlockContext = function (context) {
+                return Rules.NodeIsTypeScriptDeclWithBlockContext(context.contextNode);
+            };
+            Rules.NodeIsTypeScriptDeclWithBlockContext = function (node) {
+                switch (node.kind) {
+                    case 229 /* ClassDeclaration */:
+                    case 199 /* ClassExpression */:
+                    case 230 /* InterfaceDeclaration */:
+                    case 232 /* EnumDeclaration */:
+                    case 163 /* TypeLiteral */:
+                    case 233 /* ModuleDeclaration */:
+                    case 244 /* ExportDeclaration */:
+                    case 245 /* NamedExports */:
+                    case 238 /* ImportDeclaration */:
+                    case 241 /* NamedImports */:
+                        return true;
+                }
+                return false;
+            };
+            Rules.IsAfterCodeBlockContext = function (context) {
+                switch (context.currentTokenParent.kind) {
+                    case 229 /* ClassDeclaration */:
+                    case 233 /* ModuleDeclaration */:
+                    case 232 /* EnumDeclaration */:
+                    case 260 /* CatchClause */:
+                    case 234 /* ModuleBlock */:
+                    case 221 /* SwitchStatement */:
+                        return true;
+                    case 207 /* Block */: {
+                        var blockParent = context.currentTokenParent.parent;
+                        if (blockParent.kind !== 187 /* ArrowFunction */ &&
+                            blockParent.kind !== 186 /* FunctionExpression */) {
+                            return true;
+                        }
+                    }
+                }
+                return false;
+            };
+            Rules.IsControlDeclContext = function (context) {
+                switch (context.contextNode.kind) {
+                    case 211 /* IfStatement */:
+                    case 221 /* SwitchStatement */:
+                    case 214 /* ForStatement */:
+                    case 215 /* ForInStatement */:
+                    case 216 /* ForOfStatement */:
+                    case 213 /* WhileStatement */:
+                    case 224 /* TryStatement */:
+                    case 212 /* DoStatement */:
+                    case 220 /* WithStatement */:
+                    // TODO
+                    // case SyntaxKind.ElseClause:
+                    case 260 /* CatchClause */:
+                        return true;
+                    default:
+                        return false;
+                }
+            };
+            Rules.IsObjectContext = function (context) {
+                return context.contextNode.kind === 178 /* ObjectLiteralExpression */;
+            };
+            Rules.IsFunctionCallContext = function (context) {
+                return context.contextNode.kind === 181 /* CallExpression */;
+            };
+            Rules.IsNewContext = function (context) {
+                return context.contextNode.kind === 182 /* NewExpression */;
+            };
+            Rules.IsFunctionCallOrNewContext = function (context) {
+                return Rules.IsFunctionCallContext(context) || Rules.IsNewContext(context);
+            };
+            Rules.IsPreviousTokenNotComma = function (context) {
+                return context.currentTokenSpan.kind !== 26 /* CommaToken */;
+            };
+            Rules.IsNextTokenNotCloseBracket = function (context) {
+                return context.nextTokenSpan.kind !== 22 /* CloseBracketToken */;
+            };
+            Rules.IsArrowFunctionContext = function (context) {
+                return context.contextNode.kind === 187 /* ArrowFunction */;
+            };
+            Rules.IsNonJsxSameLineTokenContext = function (context) {
+                return context.TokensAreOnSameLine() && context.contextNode.kind !== 10 /* JsxText */;
+            };
+            Rules.IsNonJsxElementContext = function (context) {
+                return context.contextNode.kind !== 249 /* JsxElement */;
+            };
+            Rules.IsJsxExpressionContext = function (context) {
+                return context.contextNode.kind === 256 /* JsxExpression */;
+            };
+            Rules.IsNextTokenParentJsxAttribute = function (context) {
+                return context.nextTokenParent.kind === 253 /* JsxAttribute */;
+            };
+            Rules.IsJsxAttributeContext = function (context) {
+                return context.contextNode.kind === 253 /* JsxAttribute */;
+            };
+            Rules.IsJsxSelfClosingElementContext = function (context) {
+                return context.contextNode.kind === 250 /* JsxSelfClosingElement */;
+            };
+            Rules.IsNotBeforeBlockInFunctionDeclarationContext = function (context) {
+                return !Rules.IsFunctionDeclContext(context) && !Rules.IsBeforeBlockContext(context);
+            };
+            Rules.IsEndOfDecoratorContextOnSameLine = function (context) {
+                return context.TokensAreOnSameLine() &&
+                    context.contextNode.decorators &&
+                    Rules.NodeIsInDecoratorContext(context.currentTokenParent) &&
+                    !Rules.NodeIsInDecoratorContext(context.nextTokenParent);
+            };
+            Rules.NodeIsInDecoratorContext = function (node) {
+                while (ts.isPartOfExpression(node)) {
+                    node = node.parent;
+                }
+                return node.kind === 147 /* Decorator */;
+            };
+            Rules.IsStartOfVariableDeclarationList = function (context) {
+                return context.currentTokenParent.kind === 227 /* VariableDeclarationList */ &&
+                    context.currentTokenParent.getStart(context.sourceFile) === context.currentTokenSpan.pos;
+            };
+            Rules.IsNotFormatOnEnter = function (context) {
+                return context.formattingRequestKind !== 2 /* FormatOnEnter */;
+            };
+            Rules.IsModuleDeclContext = function (context) {
+                return context.contextNode.kind === 233 /* ModuleDeclaration */;
+            };
+            Rules.IsObjectTypeContext = function (context) {
+                return context.contextNode.kind === 163 /* TypeLiteral */; // && context.contextNode.parent.kind !== SyntaxKind.InterfaceDeclaration;
+            };
+            Rules.IsConstructorSignatureContext = function (context) {
+                return context.contextNode.kind === 156 /* ConstructSignature */;
+            };
+            Rules.IsTypeArgumentOrParameterOrAssertion = function (token, parent) {
+                if (token.kind !== 27 /* LessThanToken */ && token.kind !== 29 /* GreaterThanToken */) {
+                    return false;
+                }
+                switch (parent.kind) {
+                    case 159 /* TypeReference */:
+                    case 184 /* TypeAssertionExpression */:
+                    case 231 /* TypeAliasDeclaration */:
+                    case 229 /* ClassDeclaration */:
+                    case 199 /* ClassExpression */:
+                    case 230 /* InterfaceDeclaration */:
+                    case 228 /* FunctionDeclaration */:
+                    case 186 /* FunctionExpression */:
+                    case 187 /* ArrowFunction */:
+                    case 151 /* MethodDeclaration */:
+                    case 150 /* MethodSignature */:
+                    case 155 /* CallSignature */:
+                    case 156 /* ConstructSignature */:
+                    case 181 /* CallExpression */:
+                    case 182 /* NewExpression */:
+                    case 201 /* ExpressionWithTypeArguments */:
+                        return true;
+                    default:
+                        return false;
+                }
+            };
+            Rules.IsTypeArgumentOrParameterOrAssertionContext = function (context) {
+                return Rules.IsTypeArgumentOrParameterOrAssertion(context.currentTokenSpan, context.currentTokenParent) ||
+                    Rules.IsTypeArgumentOrParameterOrAssertion(context.nextTokenSpan, context.nextTokenParent);
+            };
+            Rules.IsTypeAssertionContext = function (context) {
+                return context.contextNode.kind === 184 /* TypeAssertionExpression */;
+            };
+            Rules.IsVoidOpContext = function (context) {
+                return context.currentTokenSpan.kind === 105 /* VoidKeyword */ && context.currentTokenParent.kind === 190 /* VoidExpression */;
+            };
+            Rules.IsYieldOrYieldStarWithOperand = function (context) {
+                return context.contextNode.kind === 197 /* YieldExpression */ && context.contextNode.expression !== undefined;
+            };
+            Rules.IsNonNullAssertionContext = function (context) {
+                return context.contextNode.kind === 203 /* NonNullExpression */;
+            };
+            return Rules;
         }());
-        formatting.Rule = Rule;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-///<reference path='references.ts' />
-/* @internal */
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        (function (RuleAction) {
-            RuleAction[RuleAction["Ignore"] = 1] = "Ignore";
-            RuleAction[RuleAction["Space"] = 2] = "Space";
-            RuleAction[RuleAction["NewLine"] = 4] = "NewLine";
-            RuleAction[RuleAction["Delete"] = 8] = "Delete";
-        })(formatting.RuleAction || (formatting.RuleAction = {}));
-        var RuleAction = formatting.RuleAction;
+        formatting.Rules = Rules;
     })(formatting = ts.formatting || (ts.formatting = {}));
 })(ts || (ts = {}));
 ///<reference path='references.ts' />
@@ -70906,30 +85267,152 @@ var ts;
 (function (ts) {
     var formatting;
     (function (formatting) {
-        var RuleDescriptor = (function () {
-            function RuleDescriptor(LeftTokenRange, RightTokenRange) {
-                this.LeftTokenRange = LeftTokenRange;
-                this.RightTokenRange = RightTokenRange;
+        var RulesMap = (function () {
+            function RulesMap() {
+                this.map = [];
+                this.mapRowLength = 0;
             }
-            RuleDescriptor.prototype.toString = function () {
-                return "[leftRange=" + this.LeftTokenRange + "," +
-                    "rightRange=" + this.RightTokenRange + "]";
+            RulesMap.create = function (rules) {
+                var result = new RulesMap();
+                result.Initialize(rules);
+                return result;
             };
-            RuleDescriptor.create1 = function (left, right) {
-                return RuleDescriptor.create4(formatting.Shared.TokenRange.FromToken(left), formatting.Shared.TokenRange.FromToken(right));
+            RulesMap.prototype.Initialize = function (rules) {
+                this.mapRowLength = 142 /* LastToken */ + 1;
+                this.map = new Array(this.mapRowLength * this.mapRowLength); // new Array<RulesBucket>(this.mapRowLength * this.mapRowLength);
+                // This array is used only during construction of the rulesbucket in the map
+                var rulesBucketConstructionStateList = new Array(this.map.length); // new Array<RulesBucketConstructionState>(this.map.length);
+                this.FillRules(rules, rulesBucketConstructionStateList);
+                return this.map;
             };
-            RuleDescriptor.create2 = function (left, right) {
-                return RuleDescriptor.create4(left, formatting.Shared.TokenRange.FromToken(right));
+            RulesMap.prototype.FillRules = function (rules, rulesBucketConstructionStateList) {
+                var _this = this;
+                rules.forEach(function (rule) {
+                    _this.FillRule(rule, rulesBucketConstructionStateList);
+                });
             };
-            RuleDescriptor.create3 = function (left, right) {
-                return RuleDescriptor.create4(formatting.Shared.TokenRange.FromToken(left), right);
+            RulesMap.prototype.GetRuleBucketIndex = function (row, column) {
+                ts.Debug.assert(row <= 142 /* LastKeyword */ && column <= 142 /* LastKeyword */, "Must compute formatting context from tokens");
+                var rulesBucketIndex = (row * this.mapRowLength) + column;
+                return rulesBucketIndex;
             };
-            RuleDescriptor.create4 = function (left, right) {
-                return new RuleDescriptor(left, right);
+            RulesMap.prototype.FillRule = function (rule, rulesBucketConstructionStateList) {
+                var _this = this;
+                var specificRule = rule.Descriptor.LeftTokenRange.isSpecific() && rule.Descriptor.RightTokenRange.isSpecific();
+                rule.Descriptor.LeftTokenRange.GetTokens().forEach(function (left) {
+                    rule.Descriptor.RightTokenRange.GetTokens().forEach(function (right) {
+                        var rulesBucketIndex = _this.GetRuleBucketIndex(left, right);
+                        var rulesBucket = _this.map[rulesBucketIndex];
+                        if (rulesBucket === undefined) {
+                            rulesBucket = _this.map[rulesBucketIndex] = new RulesBucket();
+                        }
+                        rulesBucket.AddRule(rule, specificRule, rulesBucketConstructionStateList, rulesBucketIndex);
+                    });
+                });
             };
-            return RuleDescriptor;
+            RulesMap.prototype.GetRule = function (context) {
+                var bucketIndex = this.GetRuleBucketIndex(context.currentTokenSpan.kind, context.nextTokenSpan.kind);
+                var bucket = this.map[bucketIndex];
+                if (bucket) {
+                    for (var _i = 0, _a = bucket.Rules(); _i < _a.length; _i++) {
+                        var rule = _a[_i];
+                        if (rule.Operation.Context.InContext(context)) {
+                            return rule;
+                        }
+                    }
+                }
+                return undefined;
+            };
+            return RulesMap;
         }());
-        formatting.RuleDescriptor = RuleDescriptor;
+        formatting.RulesMap = RulesMap;
+        var MaskBitSize = 5;
+        var Mask = 0x1f;
+        var RulesPosition;
+        (function (RulesPosition) {
+            RulesPosition[RulesPosition["IgnoreRulesSpecific"] = 0] = "IgnoreRulesSpecific";
+            RulesPosition[RulesPosition["IgnoreRulesAny"] = MaskBitSize * 1] = "IgnoreRulesAny";
+            RulesPosition[RulesPosition["ContextRulesSpecific"] = MaskBitSize * 2] = "ContextRulesSpecific";
+            RulesPosition[RulesPosition["ContextRulesAny"] = MaskBitSize * 3] = "ContextRulesAny";
+            RulesPosition[RulesPosition["NoContextRulesSpecific"] = MaskBitSize * 4] = "NoContextRulesSpecific";
+            RulesPosition[RulesPosition["NoContextRulesAny"] = MaskBitSize * 5] = "NoContextRulesAny";
+        })(RulesPosition = formatting.RulesPosition || (formatting.RulesPosition = {}));
+        var RulesBucketConstructionState = (function () {
+            function RulesBucketConstructionState() {
+                //// The Rules list contains all the inserted rules into a rulebucket in the following order:
+                ////    1- Ignore rules with specific token combination
+                ////    2- Ignore rules with any token combination
+                ////    3- Context rules with specific token combination
+                ////    4- Context rules with any token combination
+                ////    5- Non-context rules with specific token combination
+                ////    6- Non-context rules with any token combination
+                ////
+                //// The member rulesInsertionIndexBitmap is used to describe the number of rules
+                //// in each sub-bucket (above) hence can be used to know the index of where to insert
+                //// the next rule. It's a bitmap which contains 6 different sections each is given 5 bits.
+                ////
+                //// Example:
+                //// In order to insert a rule to the end of sub-bucket (3), we get the index by adding
+                //// the values in the bitmap segments 3rd, 2nd, and 1st.
+                this.rulesInsertionIndexBitmap = 0;
+            }
+            RulesBucketConstructionState.prototype.GetInsertionIndex = function (maskPosition) {
+                var index = 0;
+                var pos = 0;
+                var indexBitmap = this.rulesInsertionIndexBitmap;
+                while (pos <= maskPosition) {
+                    index += (indexBitmap & Mask);
+                    indexBitmap >>= MaskBitSize;
+                    pos += MaskBitSize;
+                }
+                return index;
+            };
+            RulesBucketConstructionState.prototype.IncreaseInsertionIndex = function (maskPosition) {
+                var value = (this.rulesInsertionIndexBitmap >> maskPosition) & Mask;
+                value++;
+                ts.Debug.assert((value & Mask) === value, "Adding more rules into the sub-bucket than allowed. Maximum allowed is 32 rules.");
+                var temp = this.rulesInsertionIndexBitmap & ~(Mask << maskPosition);
+                temp |= value << maskPosition;
+                this.rulesInsertionIndexBitmap = temp;
+            };
+            return RulesBucketConstructionState;
+        }());
+        formatting.RulesBucketConstructionState = RulesBucketConstructionState;
+        var RulesBucket = (function () {
+            function RulesBucket() {
+                this.rules = [];
+            }
+            RulesBucket.prototype.Rules = function () {
+                return this.rules;
+            };
+            RulesBucket.prototype.AddRule = function (rule, specificTokens, constructionState, rulesBucketIndex) {
+                var position;
+                if (rule.Operation.Action === 1 /* Ignore */) {
+                    position = specificTokens ?
+                        RulesPosition.IgnoreRulesSpecific :
+                        RulesPosition.IgnoreRulesAny;
+                }
+                else if (!rule.Operation.Context.IsAny()) {
+                    position = specificTokens ?
+                        RulesPosition.ContextRulesSpecific :
+                        RulesPosition.ContextRulesAny;
+                }
+                else {
+                    position = specificTokens ?
+                        RulesPosition.NoContextRulesSpecific :
+                        RulesPosition.NoContextRulesAny;
+                }
+                var state = constructionState[rulesBucketIndex];
+                if (state === undefined) {
+                    state = constructionState[rulesBucketIndex] = new RulesBucketConstructionState();
+                }
+                var index = state.GetInsertionIndex(position);
+                this.rules.splice(index, 0, rule);
+                state.IncreaseInsertionIndex(position);
+            };
+            return RulesBucket;
+        }());
+        formatting.RulesBucket = RulesBucket;
     })(formatting = ts.formatting || (ts.formatting = {}));
 })(ts || (ts = {}));
 ///<reference path='references.ts' />
@@ -70938,2392 +85421,3884 @@ var ts;
 (function (ts) {
     var formatting;
     (function (formatting) {
-        (function (RuleFlags) {
-            RuleFlags[RuleFlags["None"] = 0] = "None";
-            RuleFlags[RuleFlags["CanDeleteNewLines"] = 1] = "CanDeleteNewLines";
-        })(formatting.RuleFlags || (formatting.RuleFlags = {}));
-        var RuleFlags = formatting.RuleFlags;
+        var Shared;
+        (function (Shared) {
+            var allTokens = [];
+            for (var token = 0 /* FirstToken */; token <= 142 /* LastToken */; token++) {
+                allTokens.push(token);
+            }
+            var TokenValuesAccess = (function () {
+                function TokenValuesAccess(tokens) {
+                    if (tokens === void 0) { tokens = []; }
+                    this.tokens = tokens;
+                }
+                TokenValuesAccess.prototype.GetTokens = function () {
+                    return this.tokens;
+                };
+                TokenValuesAccess.prototype.Contains = function (token) {
+                    return this.tokens.indexOf(token) >= 0;
+                };
+                TokenValuesAccess.prototype.isSpecific = function () { return true; };
+                return TokenValuesAccess;
+            }());
+            var TokenSingleValueAccess = (function () {
+                function TokenSingleValueAccess(token) {
+                    this.token = token;
+                }
+                TokenSingleValueAccess.prototype.GetTokens = function () {
+                    return [this.token];
+                };
+                TokenSingleValueAccess.prototype.Contains = function (tokenValue) {
+                    return tokenValue === this.token;
+                };
+                TokenSingleValueAccess.prototype.isSpecific = function () { return true; };
+                return TokenSingleValueAccess;
+            }());
+            var TokenAllAccess = (function () {
+                function TokenAllAccess() {
+                }
+                TokenAllAccess.prototype.GetTokens = function () {
+                    return allTokens;
+                };
+                TokenAllAccess.prototype.Contains = function () {
+                    return true;
+                };
+                TokenAllAccess.prototype.toString = function () {
+                    return "[allTokens]";
+                };
+                TokenAllAccess.prototype.isSpecific = function () { return false; };
+                return TokenAllAccess;
+            }());
+            var TokenAllExceptAccess = (function () {
+                function TokenAllExceptAccess(except) {
+                    this.except = except;
+                }
+                TokenAllExceptAccess.prototype.GetTokens = function () {
+                    var _this = this;
+                    return allTokens.filter(function (t) { return t !== _this.except; });
+                };
+                TokenAllExceptAccess.prototype.Contains = function (token) {
+                    return token !== this.except;
+                };
+                TokenAllExceptAccess.prototype.isSpecific = function () { return false; };
+                return TokenAllExceptAccess;
+            }());
+            var TokenRange;
+            (function (TokenRange) {
+                function FromToken(token) {
+                    return new TokenSingleValueAccess(token);
+                }
+                TokenRange.FromToken = FromToken;
+                function FromTokens(tokens) {
+                    return new TokenValuesAccess(tokens);
+                }
+                TokenRange.FromTokens = FromTokens;
+                function FromRange(from, to, except) {
+                    if (except === void 0) { except = []; }
+                    var tokens = [];
+                    for (var token = from; token <= to; token++) {
+                        if (ts.indexOf(except, token) < 0) {
+                            tokens.push(token);
+                        }
+                    }
+                    return new TokenValuesAccess(tokens);
+                }
+                TokenRange.FromRange = FromRange;
+                function AnyExcept(token) {
+                    return new TokenAllExceptAccess(token);
+                }
+                TokenRange.AnyExcept = AnyExcept;
+                TokenRange.Any = new TokenAllAccess();
+                TokenRange.AnyIncludingMultilineComments = TokenRange.FromTokens(allTokens.concat([3 /* MultiLineCommentTrivia */]));
+                TokenRange.Keywords = TokenRange.FromRange(72 /* FirstKeyword */, 142 /* LastKeyword */);
+                TokenRange.BinaryOperators = TokenRange.FromRange(27 /* FirstBinaryOperator */, 70 /* LastBinaryOperator */);
+                TokenRange.BinaryKeywordOperators = TokenRange.FromTokens([
+                    92 /* InKeyword */, 93 /* InstanceOfKeyword */, 142 /* OfKeyword */, 118 /* AsKeyword */, 126 /* IsKeyword */
+                ]);
+                TokenRange.UnaryPrefixOperators = TokenRange.FromTokens([
+                    43 /* PlusPlusToken */, 44 /* MinusMinusToken */, 52 /* TildeToken */, 51 /* ExclamationToken */
+                ]);
+                TokenRange.UnaryPrefixExpressions = TokenRange.FromTokens([
+                    8 /* NumericLiteral */, 71 /* Identifier */, 19 /* OpenParenToken */, 21 /* OpenBracketToken */,
+                    17 /* OpenBraceToken */, 99 /* ThisKeyword */, 94 /* NewKeyword */
+                ]);
+                TokenRange.UnaryPreincrementExpressions = TokenRange.FromTokens([
+                    71 /* Identifier */, 19 /* OpenParenToken */, 99 /* ThisKeyword */, 94 /* NewKeyword */
+                ]);
+                TokenRange.UnaryPostincrementExpressions = TokenRange.FromTokens([
+                    71 /* Identifier */, 20 /* CloseParenToken */, 22 /* CloseBracketToken */, 94 /* NewKeyword */
+                ]);
+                TokenRange.UnaryPredecrementExpressions = TokenRange.FromTokens([
+                    71 /* Identifier */, 19 /* OpenParenToken */, 99 /* ThisKeyword */, 94 /* NewKeyword */
+                ]);
+                TokenRange.UnaryPostdecrementExpressions = TokenRange.FromTokens([
+                    71 /* Identifier */, 20 /* CloseParenToken */, 22 /* CloseBracketToken */, 94 /* NewKeyword */
+                ]);
+                TokenRange.Comments = TokenRange.FromTokens([2 /* SingleLineCommentTrivia */, 3 /* MultiLineCommentTrivia */]);
+                TokenRange.TypeNames = TokenRange.FromTokens([
+                    71 /* Identifier */, 133 /* NumberKeyword */, 136 /* StringKeyword */, 122 /* BooleanKeyword */,
+                    137 /* SymbolKeyword */, 105 /* VoidKeyword */, 119 /* AnyKeyword */
+                ]);
+            })(TokenRange = Shared.TokenRange || (Shared.TokenRange = {}));
+        })(Shared = formatting.Shared || (formatting.Shared = {}));
     })(formatting = ts.formatting || (ts.formatting = {}));
 })(ts || (ts = {}));
-///<reference path='references.ts' />
+///<reference path='..\services.ts' />
+///<reference path='formattingContext.ts' />
+///<reference path='formattingRequestKind.ts' />
+///<reference path='rule.ts' />
+///<reference path='ruleAction.ts' />
+///<reference path='ruleDescriptor.ts' />
+///<reference path='ruleFlag.ts' />
+///<reference path='ruleOperation.ts' />
+///<reference path='ruleOperationContext.ts' />
+///<reference path='rules.ts' />
+///<reference path='rulesMap.ts' />
+///<reference path='tokenRange.ts' /> 
+/// <reference path="references.ts"/>
 /* @internal */
 var ts;
 (function (ts) {
     var formatting;
     (function (formatting) {
-        var RuleOperation = (function () {
-            function RuleOperation(Context, Action) {
-                this.Context = Context;
-                this.Action = Action;
+        var RulesProvider = (function () {
+            function RulesProvider() {
+                this.globalRules = new formatting.Rules();
+                var activeRules = this.globalRules.HighPriorityCommonRules.slice(0).concat(this.globalRules.UserConfigurableRules).concat(this.globalRules.LowPriorityCommonRules);
+                this.rulesMap = formatting.RulesMap.create(activeRules);
             }
-            RuleOperation.prototype.toString = function () {
-                return "[context=" + this.Context + "," +
-                    "action=" + this.Action + "]";
+            RulesProvider.prototype.getRuleName = function (rule) {
+                return this.globalRules.getRuleName(rule);
             };
-            RuleOperation.create1 = function (action) {
-                return RuleOperation.create2(formatting.RuleOperationContext.Any, action);
+            RulesProvider.prototype.getRuleByName = function (name) {
+                return this.globalRules[name];
             };
-            RuleOperation.create2 = function (context, action) {
-                return new RuleOperation(context, action);
+            RulesProvider.prototype.getRulesMap = function () {
+                return this.rulesMap;
             };
-            return RuleOperation;
+            RulesProvider.prototype.getFormatOptions = function () {
+                return this.options;
+            };
+            RulesProvider.prototype.ensureUpToDate = function (options) {
+                if (!this.options || !ts.compareDataObjects(this.options, options)) {
+                    this.options = ts.clone(options);
+                }
+            };
+            return RulesProvider;
         }());
-        formatting.RuleOperation = RuleOperation;
+        formatting.RulesProvider = RulesProvider;
     })(formatting = ts.formatting || (ts.formatting = {}));
 })(ts || (ts = {}));
+///<reference path='..\services.ts' />
+///<reference path='formattingScanner.ts' />
+///<reference path='rulesProvider.ts' />
 ///<reference path='references.ts' />
 /* @internal */
 var ts;
 (function (ts) {
     var formatting;
     (function (formatting) {
-        var RuleOperationContext = (function () {
-            function RuleOperationContext() {
-                var funcs = [];
-                for (var _i = 0; _i < arguments.length; _i++) {
-                    funcs[_i - 0] = arguments[_i];
+        var Constants;
+        (function (Constants) {
+            Constants[Constants["Unknown"] = -1] = "Unknown";
+        })(Constants || (Constants = {}));
+        function formatOnEnter(position, sourceFile, rulesProvider, options) {
+            var line = sourceFile.getLineAndCharacterOfPosition(position).line;
+            if (line === 0) {
+                return [];
+            }
+            // After the enter key, the cursor is now at a new line. The new line may or may not contain non-whitespace characters.
+            // If the new line has only whitespaces, we won't want to format this line, because that would remove the indentation as
+            // trailing whitespaces. So the end of the formatting span should be the later one between:
+            //  1. the end of the previous line
+            //  2. the last non-whitespace character in the current line
+            var endOfFormatSpan = ts.getEndLinePosition(line, sourceFile);
+            while (ts.isWhiteSpaceSingleLine(sourceFile.text.charCodeAt(endOfFormatSpan))) {
+                endOfFormatSpan--;
+            }
+            // if the character at the end of the span is a line break, we shouldn't include it, because it indicates we don't want to
+            // touch the current line at all. Also, on some OSes the line break consists of two characters (\r\n), we should test if the
+            // previous character before the end of format span is line break character as well.
+            if (ts.isLineBreak(sourceFile.text.charCodeAt(endOfFormatSpan))) {
+                endOfFormatSpan--;
+            }
+            var span = {
+                // get start position for the previous line
+                pos: ts.getStartPositionOfLine(line - 1, sourceFile),
+                // end value is exclusive so add 1 to the result
+                end: endOfFormatSpan + 1
+            };
+            return formatSpan(span, sourceFile, options, rulesProvider, 2 /* FormatOnEnter */);
+        }
+        formatting.formatOnEnter = formatOnEnter;
+        function formatOnSemicolon(position, sourceFile, rulesProvider, options) {
+            return formatOutermostParent(position, 25 /* SemicolonToken */, sourceFile, options, rulesProvider, 3 /* FormatOnSemicolon */);
+        }
+        formatting.formatOnSemicolon = formatOnSemicolon;
+        function formatOnClosingCurly(position, sourceFile, rulesProvider, options) {
+            return formatOutermostParent(position, 18 /* CloseBraceToken */, sourceFile, options, rulesProvider, 4 /* FormatOnClosingCurlyBrace */);
+        }
+        formatting.formatOnClosingCurly = formatOnClosingCurly;
+        function formatDocument(sourceFile, rulesProvider, options) {
+            var span = {
+                pos: 0,
+                end: sourceFile.text.length
+            };
+            return formatSpan(span, sourceFile, options, rulesProvider, 0 /* FormatDocument */);
+        }
+        formatting.formatDocument = formatDocument;
+        function formatSelection(start, end, sourceFile, rulesProvider, options) {
+            // format from the beginning of the line
+            var span = {
+                pos: ts.getLineStartPositionForPosition(start, sourceFile),
+                end: end
+            };
+            return formatSpan(span, sourceFile, options, rulesProvider, 1 /* FormatSelection */);
+        }
+        formatting.formatSelection = formatSelection;
+        function formatOutermostParent(position, expectedLastToken, sourceFile, options, rulesProvider, requestKind) {
+            var parent = findOutermostParent(position, expectedLastToken, sourceFile);
+            if (!parent) {
+                return [];
+            }
+            var span = {
+                pos: ts.getLineStartPositionForPosition(parent.getStart(sourceFile), sourceFile),
+                end: parent.end
+            };
+            return formatSpan(span, sourceFile, options, rulesProvider, requestKind);
+        }
+        function findOutermostParent(position, expectedTokenKind, sourceFile) {
+            var precedingToken = ts.findPrecedingToken(position, sourceFile);
+            // when it is claimed that trigger character was typed at given position
+            // we verify that there is a token with a matching kind whose end is equal to position (because the character was just typed).
+            // If this condition is not hold - then trigger character was typed in some other context,
+            // i.e.in comment and thus should not trigger autoformatting
+            if (!precedingToken ||
+                precedingToken.kind !== expectedTokenKind ||
+                position !== precedingToken.getEnd()) {
+                return undefined;
+            }
+            // walk up and search for the parent node that ends at the same position with precedingToken.
+            // for cases like this
+            //
+            // let x = 1;
+            // while (true) {
+            // }
+            // after typing close curly in while statement we want to reformat just the while statement.
+            // However if we just walk upwards searching for the parent that has the same end value -
+            // we'll end up with the whole source file. isListElement allows to stop on the list element level
+            var current = precedingToken;
+            while (current &&
+                current.parent &&
+                current.parent.end === precedingToken.end &&
+                !isListElement(current.parent, current)) {
+                current = current.parent;
+            }
+            return current;
+        }
+        // Returns true if node is a element in some list in parent
+        // i.e. parent is class declaration with the list of members and node is one of members.
+        function isListElement(parent, node) {
+            switch (parent.kind) {
+                case 229 /* ClassDeclaration */:
+                case 230 /* InterfaceDeclaration */:
+                    return ts.rangeContainsRange(parent.members, node);
+                case 233 /* ModuleDeclaration */:
+                    var body = parent.body;
+                    return body && body.kind === 234 /* ModuleBlock */ && ts.rangeContainsRange(body.statements, node);
+                case 265 /* SourceFile */:
+                case 207 /* Block */:
+                case 234 /* ModuleBlock */:
+                    return ts.rangeContainsRange(parent.statements, node);
+                case 260 /* CatchClause */:
+                    return ts.rangeContainsRange(parent.block.statements, node);
+            }
+            return false;
+        }
+        /** find node that fully contains given text range */
+        function findEnclosingNode(range, sourceFile) {
+            return find(sourceFile);
+            function find(n) {
+                var candidate = ts.forEachChild(n, function (c) { return ts.startEndContainsRange(c.getStart(sourceFile), c.end, range) && c; });
+                if (candidate) {
+                    var result = find(candidate);
+                    if (result) {
+                        return result;
+                    }
+                }
+                return n;
+            }
+        }
+        /** formatting is not applied to ranges that contain parse errors.
+         * This function will return a predicate that for a given text range will tell
+         * if there are any parse errors that overlap with the range.
+         */
+        function prepareRangeContainsErrorFunction(errors, originalRange) {
+            if (!errors.length) {
+                return rangeHasNoErrors;
+            }
+            // pick only errors that fall in range
+            var sorted = errors
+                .filter(function (d) { return ts.rangeOverlapsWithStartEnd(originalRange, d.start, d.start + d.length); })
+                .sort(function (e1, e2) { return e1.start - e2.start; });
+            if (!sorted.length) {
+                return rangeHasNoErrors;
+            }
+            var index = 0;
+            return function (r) {
+                // in current implementation sequence of arguments [r1, r2...] is monotonically increasing.
+                // 'index' tracks the index of the most recent error that was checked.
+                while (true) {
+                    if (index >= sorted.length) {
+                        // all errors in the range were already checked -> no error in specified range
+                        return false;
+                    }
+                    var error = sorted[index];
+                    if (r.end <= error.start) {
+                        // specified range ends before the error refered by 'index' - no error in range
+                        return false;
+                    }
+                    if (ts.startEndOverlapsWithStartEnd(r.pos, r.end, error.start, error.start + error.length)) {
+                        // specified range overlaps with error range
+                        return true;
+                    }
+                    index++;
+                }
+            };
+            function rangeHasNoErrors() {
+                return false;
+            }
+        }
+        /**
+         * Start of the original range might fall inside the comment - scanner will not yield appropriate results
+         * This function will look for token that is located before the start of target range
+         * and return its end as start position for the scanner.
+         */
+        function getScanStartPosition(enclosingNode, originalRange, sourceFile) {
+            var start = enclosingNode.getStart(sourceFile);
+            if (start === originalRange.pos && enclosingNode.end === originalRange.end) {
+                return start;
+            }
+            var precedingToken = ts.findPrecedingToken(originalRange.pos, sourceFile);
+            if (!precedingToken) {
+                // no preceding token found - start from the beginning of enclosing node
+                return enclosingNode.pos;
+            }
+            // preceding token ends after the start of original range (i.e when originalRange.pos falls in the middle of literal)
+            // start from the beginning of enclosingNode to handle the entire 'originalRange'
+            if (precedingToken.end >= originalRange.pos) {
+                return enclosingNode.pos;
+            }
+            return precedingToken.end;
+        }
+        /*
+         * For cases like
+         * if (a ||
+         *     b ||$
+         *     c) {...}
+         * If we hit Enter at $ we want line '    b ||' to be indented.
+         * Formatting will be applied to the last two lines.
+         * Node that fully encloses these lines is binary expression 'a ||...'.
+         * Initial indentation for this node will be 0.
+         * Binary expressions don't introduce new indentation scopes, however it is possible
+         * that some parent node on the same line does - like if statement in this case.
+         * Note that we are considering parents only from the same line with initial node -
+         * if parent is on the different line - its delta was already contributed
+         * to the initial indentation.
+         */
+        function getOwnOrInheritedDelta(n, options, sourceFile) {
+            var previousLine = -1 /* Unknown */;
+            var child;
+            while (n) {
+                var line = sourceFile.getLineAndCharacterOfPosition(n.getStart(sourceFile)).line;
+                if (previousLine !== -1 /* Unknown */ && line !== previousLine) {
+                    break;
+                }
+                if (formatting.SmartIndenter.shouldIndentChildNode(n, child)) {
+                    return options.indentSize;
+                }
+                previousLine = line;
+                child = n;
+                n = n.parent;
+            }
+            return 0;
+        }
+        /* @internal */
+        function formatNode(node, sourceFileLike, languageVariant, initialIndentation, delta, rulesProvider) {
+            var range = { pos: 0, end: sourceFileLike.text.length };
+            return formatSpanWorker(range, node, initialIndentation, delta, formatting.getFormattingScanner(sourceFileLike.text, languageVariant, range.pos, range.end), rulesProvider.getFormatOptions(), rulesProvider, 1 /* FormatSelection */, function (_) { return false; }, // assume that node does not have any errors
+            sourceFileLike);
+        }
+        formatting.formatNode = formatNode;
+        function formatSpan(originalRange, sourceFile, options, rulesProvider, requestKind) {
+            // find the smallest node that fully wraps the range and compute the initial indentation for the node
+            var enclosingNode = findEnclosingNode(originalRange, sourceFile);
+            return formatSpanWorker(originalRange, enclosingNode, formatting.SmartIndenter.getIndentationForNode(enclosingNode, originalRange, sourceFile, options), getOwnOrInheritedDelta(enclosingNode, options, sourceFile), formatting.getFormattingScanner(sourceFile.text, sourceFile.languageVariant, getScanStartPosition(enclosingNode, originalRange, sourceFile), originalRange.end), options, rulesProvider, requestKind, prepareRangeContainsErrorFunction(sourceFile.parseDiagnostics, originalRange), sourceFile);
+        }
+        function formatSpanWorker(originalRange, enclosingNode, initialIndentation, delta, formattingScanner, options, rulesProvider, requestKind, rangeContainsError, sourceFile) {
+            // formatting context is used by rules provider
+            var formattingContext = new formatting.FormattingContext(sourceFile, requestKind, options);
+            var previousRangeHasError;
+            var previousRange;
+            var previousParent;
+            var previousRangeStartLine;
+            var lastIndentedLine;
+            var indentationOnLastIndentedLine;
+            var edits = [];
+            formattingScanner.advance();
+            if (formattingScanner.isOnToken()) {
+                var startLine = sourceFile.getLineAndCharacterOfPosition(enclosingNode.getStart(sourceFile)).line;
+                var undecoratedStartLine = startLine;
+                if (enclosingNode.decorators) {
+                    undecoratedStartLine = sourceFile.getLineAndCharacterOfPosition(ts.getNonDecoratorTokenPosOfNode(enclosingNode, sourceFile)).line;
                 }
-                this.customContextChecks = funcs;
+                processNode(enclosingNode, enclosingNode, startLine, undecoratedStartLine, initialIndentation, delta);
             }
-            RuleOperationContext.prototype.IsAny = function () {
-                return this === RuleOperationContext.Any;
-            };
-            RuleOperationContext.prototype.InContext = function (context) {
-                if (this.IsAny()) {
-                    return true;
-                }
-                for (var _i = 0, _a = this.customContextChecks; _i < _a.length; _i++) {
-                    var check = _a[_i];
-                    if (!check(context)) {
-                        return false;
-                    }
+            if (!formattingScanner.isOnToken()) {
+                var leadingTrivia = formattingScanner.getCurrentLeadingTrivia();
+                if (leadingTrivia) {
+                    processTrivia(leadingTrivia, enclosingNode, enclosingNode, /*dynamicIndentation*/ undefined);
+                    trimTrailingWhitespacesForRemainingRange();
                 }
-                return true;
-            };
-            return RuleOperationContext;
-        }());
-        RuleOperationContext.Any = new RuleOperationContext();
-        formatting.RuleOperationContext = RuleOperationContext;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-///<reference path='references.ts' />
-/* @internal */
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var Rules = (function () {
-            function Rules() {
-                ///
-                /// Common Rules
-                ///
-                // Leave comments alone
-                this.IgnoreBeforeComment = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.Comments), formatting.RuleOperation.create1(1 /* Ignore */));
-                this.IgnoreAfterLineComment = new formatting.Rule(formatting.RuleDescriptor.create3(2 /* SingleLineCommentTrivia */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create1(1 /* Ignore */));
-                // Space after keyword but not before ; or : or ?
-                this.NoSpaceBeforeSemicolon = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 23 /* SemicolonToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.NoSpaceBeforeColon = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 54 /* ColonToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 8 /* Delete */));
-                this.NoSpaceBeforeQuestionMark = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 53 /* QuestionToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 8 /* Delete */));
-                this.SpaceAfterColon = new formatting.Rule(formatting.RuleDescriptor.create3(54 /* ColonToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 2 /* Space */));
-                this.SpaceAfterQuestionMarkInConditionalOperator = new formatting.Rule(formatting.RuleDescriptor.create3(53 /* QuestionToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsConditionalOperatorContext), 2 /* Space */));
-                this.NoSpaceAfterQuestionMark = new formatting.Rule(formatting.RuleDescriptor.create3(53 /* QuestionToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.SpaceAfterSemicolon = new formatting.Rule(formatting.RuleDescriptor.create3(23 /* SemicolonToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                // Space after }.
-                this.SpaceAfterCloseBrace = new formatting.Rule(formatting.RuleDescriptor.create3(16 /* CloseBraceToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsAfterCodeBlockContext), 2 /* Space */));
-                // Special case for (}, else) and (}, while) since else & while tokens are not part of the tree which makes SpaceAfterCloseBrace rule not applied
-                this.SpaceBetweenCloseBraceAndElse = new formatting.Rule(formatting.RuleDescriptor.create1(16 /* CloseBraceToken */, 80 /* ElseKeyword */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.SpaceBetweenCloseBraceAndWhile = new formatting.Rule(formatting.RuleDescriptor.create1(16 /* CloseBraceToken */, 104 /* WhileKeyword */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.NoSpaceAfterCloseBrace = new formatting.Rule(formatting.RuleDescriptor.create3(16 /* CloseBraceToken */, formatting.Shared.TokenRange.FromTokens([18 /* CloseParenToken */, 20 /* CloseBracketToken */, 24 /* CommaToken */, 23 /* SemicolonToken */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                // No space for dot
-                this.NoSpaceBeforeDot = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 21 /* DotToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.NoSpaceAfterDot = new formatting.Rule(formatting.RuleDescriptor.create3(21 /* DotToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                // No space before and after indexer
-                this.NoSpaceBeforeOpenBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 19 /* OpenBracketToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.NoSpaceAfterCloseBracket = new formatting.Rule(formatting.RuleDescriptor.create3(20 /* CloseBracketToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBeforeBlockInFunctionDeclarationContext), 8 /* Delete */));
-                // Place a space before open brace in a function declaration
-                this.FunctionOpenBraceLeftTokenRange = formatting.Shared.TokenRange.AnyIncludingMultilineComments;
-                this.SpaceBeforeOpenBraceInFunction = new formatting.Rule(formatting.RuleDescriptor.create2(this.FunctionOpenBraceLeftTokenRange, 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext, Rules.IsBeforeBlockContext, Rules.IsNotFormatOnEnter, Rules.IsSameLineTokenOrBeforeMultilineBlockContext), 2 /* Space */), 1 /* CanDeleteNewLines */);
-                // Place a space before open brace in a TypeScript declaration that has braces as children (class, module, enum, etc)
-                this.TypeScriptOpenBraceLeftTokenRange = formatting.Shared.TokenRange.FromTokens([69 /* Identifier */, 3 /* MultiLineCommentTrivia */, 73 /* ClassKeyword */, 82 /* ExportKeyword */, 89 /* ImportKeyword */]);
-                this.SpaceBeforeOpenBraceInTypeScriptDeclWithBlock = new formatting.Rule(formatting.RuleDescriptor.create2(this.TypeScriptOpenBraceLeftTokenRange, 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsTypeScriptDeclWithBlockContext, Rules.IsNotFormatOnEnter, Rules.IsSameLineTokenOrBeforeMultilineBlockContext), 2 /* Space */), 1 /* CanDeleteNewLines */);
-                // Place a space before open brace in a control flow construct
-                this.ControlOpenBraceLeftTokenRange = formatting.Shared.TokenRange.FromTokens([18 /* CloseParenToken */, 3 /* MultiLineCommentTrivia */, 79 /* DoKeyword */, 100 /* TryKeyword */, 85 /* FinallyKeyword */, 80 /* ElseKeyword */]);
-                this.SpaceBeforeOpenBraceInControl = new formatting.Rule(formatting.RuleDescriptor.create2(this.ControlOpenBraceLeftTokenRange, 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsControlDeclContext, Rules.IsNotFormatOnEnter, Rules.IsSameLineTokenOrBeforeMultilineBlockContext), 2 /* Space */), 1 /* CanDeleteNewLines */);
-                // Insert a space after { and before } in single-line contexts, but remove space from empty object literals {}.
-                this.SpaceAfterOpenBrace = new formatting.Rule(formatting.RuleDescriptor.create3(15 /* OpenBraceToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsSingleLineBlockContext), 2 /* Space */));
-                this.SpaceBeforeCloseBrace = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 16 /* CloseBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsSingleLineBlockContext), 2 /* Space */));
-                this.NoSpaceAfterOpenBrace = new formatting.Rule(formatting.RuleDescriptor.create3(15 /* OpenBraceToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsSingleLineBlockContext), 8 /* Delete */));
-                this.NoSpaceBeforeCloseBrace = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 16 /* CloseBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsSingleLineBlockContext), 8 /* Delete */));
-                this.NoSpaceBetweenEmptyBraceBrackets = new formatting.Rule(formatting.RuleDescriptor.create1(15 /* OpenBraceToken */, 16 /* CloseBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsObjectContext), 8 /* Delete */));
-                // Insert new line after { and before } in multi-line contexts.
-                this.NewLineAfterOpenBraceInBlockContext = new formatting.Rule(formatting.RuleDescriptor.create3(15 /* OpenBraceToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsMultilineBlockContext), 4 /* NewLine */));
-                // For functions and control block place } on a new line    [multi-line rule]
-                this.NewLineBeforeCloseBraceInBlockContext = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.AnyIncludingMultilineComments, 16 /* CloseBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsMultilineBlockContext), 4 /* NewLine */));
-                // Special handling of unary operators.
-                // Prefix operators generally shouldn't have a space between
-                // them and their target unary expression.
-                this.NoSpaceAfterUnaryPrefixOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.UnaryPrefixOperators, formatting.Shared.TokenRange.UnaryPrefixExpressions), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 8 /* Delete */));
-                this.NoSpaceAfterUnaryPreincrementOperator = new formatting.Rule(formatting.RuleDescriptor.create3(41 /* PlusPlusToken */, formatting.Shared.TokenRange.UnaryPreincrementExpressions), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.NoSpaceAfterUnaryPredecrementOperator = new formatting.Rule(formatting.RuleDescriptor.create3(42 /* MinusMinusToken */, formatting.Shared.TokenRange.UnaryPredecrementExpressions), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.NoSpaceBeforeUnaryPostincrementOperator = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.UnaryPostincrementExpressions, 41 /* PlusPlusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.NoSpaceBeforeUnaryPostdecrementOperator = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.UnaryPostdecrementExpressions, 42 /* MinusMinusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                // More unary operator special-casing.
-                // DevDiv 181814:  Be careful when removing leading whitespace
-                // around unary operators.  Examples:
-                //      1 - -2  --X-->  1--2
-                //      a + ++b --X-->  a+++b
-                this.SpaceAfterPostincrementWhenFollowedByAdd = new formatting.Rule(formatting.RuleDescriptor.create1(41 /* PlusPlusToken */, 35 /* PlusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
-                this.SpaceAfterAddWhenFollowedByUnaryPlus = new formatting.Rule(formatting.RuleDescriptor.create1(35 /* PlusToken */, 35 /* PlusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
-                this.SpaceAfterAddWhenFollowedByPreincrement = new formatting.Rule(formatting.RuleDescriptor.create1(35 /* PlusToken */, 41 /* PlusPlusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
-                this.SpaceAfterPostdecrementWhenFollowedBySubtract = new formatting.Rule(formatting.RuleDescriptor.create1(42 /* MinusMinusToken */, 36 /* MinusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
-                this.SpaceAfterSubtractWhenFollowedByUnaryMinus = new formatting.Rule(formatting.RuleDescriptor.create1(36 /* MinusToken */, 36 /* MinusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
-                this.SpaceAfterSubtractWhenFollowedByPredecrement = new formatting.Rule(formatting.RuleDescriptor.create1(36 /* MinusToken */, 42 /* MinusMinusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
-                this.NoSpaceBeforeComma = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 24 /* CommaToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.SpaceAfterCertainKeywords = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([102 /* VarKeyword */, 98 /* ThrowKeyword */, 92 /* NewKeyword */, 78 /* DeleteKeyword */, 94 /* ReturnKeyword */, 101 /* TypeOfKeyword */, 119 /* AwaitKeyword */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.SpaceAfterLetConstInVariableDeclaration = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([108 /* LetKeyword */, 74 /* ConstKeyword */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsStartOfVariableDeclarationList), 2 /* Space */));
-                this.NoSpaceBeforeOpenParenInFuncCall = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsFunctionCallOrNewContext, Rules.IsPreviousTokenNotComma), 8 /* Delete */));
-                this.SpaceAfterFunctionInFuncDecl = new formatting.Rule(formatting.RuleDescriptor.create3(87 /* FunctionKeyword */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext), 2 /* Space */));
-                this.NoSpaceBeforeOpenParenInFuncDecl = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsFunctionDeclContext), 8 /* Delete */));
-                this.SpaceAfterVoidOperator = new formatting.Rule(formatting.RuleDescriptor.create3(103 /* VoidKeyword */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsVoidOpContext), 2 /* Space */));
-                this.NoSpaceBetweenReturnAndSemicolon = new formatting.Rule(formatting.RuleDescriptor.create1(94 /* ReturnKeyword */, 23 /* SemicolonToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                // Add a space between statements. All keywords except (do,else,case) has open/close parens after them.
-                // So, we have a rule to add a space for [),Any], [do,Any], [else,Any], and [case,Any]
-                this.SpaceBetweenStatements = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([18 /* CloseParenToken */, 79 /* DoKeyword */, 80 /* ElseKeyword */, 71 /* CaseKeyword */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNonJsxElementContext, Rules.IsNotForContext), 2 /* Space */));
-                // This low-pri rule takes care of "try {" and "finally {" in case the rule SpaceBeforeOpenBraceInControl didn't execute on FormatOnEnter.
-                this.SpaceAfterTryFinally = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.FromTokens([100 /* TryKeyword */, 85 /* FinallyKeyword */]), 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                //      get x() {}
-                //      set x(val) {}
-                this.SpaceAfterGetSetInMember = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.FromTokens([123 /* GetKeyword */, 131 /* SetKeyword */]), 69 /* Identifier */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext), 2 /* Space */));
-                // Special case for binary operators (that are keywords). For these we have to add a space and shouldn't follow any user options.
-                this.SpaceBeforeBinaryKeywordOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.BinaryKeywordOperators), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
-                this.SpaceAfterBinaryKeywordOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.BinaryKeywordOperators, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
-                // TypeScript-specific higher priority rules
-                // Treat constructor as an identifier in a function declaration, and remove spaces between constructor and following left parentheses
-                this.NoSpaceAfterConstructor = new formatting.Rule(formatting.RuleDescriptor.create1(121 /* ConstructorKeyword */, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                // Use of module as a function call. e.g.: import m2 = module("m2");
-                this.NoSpaceAfterModuleImport = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.FromTokens([125 /* ModuleKeyword */, 129 /* RequireKeyword */]), 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                // Add a space around certain TypeScript keywords
-                this.SpaceAfterCertainTypeScriptKeywords = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([115 /* AbstractKeyword */, 73 /* ClassKeyword */, 122 /* DeclareKeyword */, 77 /* DefaultKeyword */, 81 /* EnumKeyword */, 82 /* ExportKeyword */, 83 /* ExtendsKeyword */, 123 /* GetKeyword */, 106 /* ImplementsKeyword */, 89 /* ImportKeyword */, 107 /* InterfaceKeyword */, 125 /* ModuleKeyword */, 126 /* NamespaceKeyword */, 110 /* PrivateKeyword */, 112 /* PublicKeyword */, 111 /* ProtectedKeyword */, 131 /* SetKeyword */, 113 /* StaticKeyword */, 134 /* TypeKeyword */, 136 /* FromKeyword */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.SpaceBeforeCertainTypeScriptKeywords = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.FromTokens([83 /* ExtendsKeyword */, 106 /* ImplementsKeyword */, 136 /* FromKeyword */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                // Treat string literals in module names as identifiers, and add a space between the literal and the opening Brace braces, e.g.: module "m2" {
-                this.SpaceAfterModuleName = new formatting.Rule(formatting.RuleDescriptor.create1(9 /* StringLiteral */, 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsModuleDeclContext), 2 /* Space */));
-                // Lambda expressions
-                this.SpaceBeforeArrow = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 34 /* EqualsGreaterThanToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.SpaceAfterArrow = new formatting.Rule(formatting.RuleDescriptor.create3(34 /* EqualsGreaterThanToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                // Optional parameters and let args
-                this.NoSpaceAfterEllipsis = new formatting.Rule(formatting.RuleDescriptor.create1(22 /* DotDotDotToken */, 69 /* Identifier */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.NoSpaceAfterOptionalParameters = new formatting.Rule(formatting.RuleDescriptor.create3(53 /* QuestionToken */, formatting.Shared.TokenRange.FromTokens([18 /* CloseParenToken */, 24 /* CommaToken */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 8 /* Delete */));
-                // generics and type assertions
-                this.NoSpaceBeforeOpenAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.TypeNames, 25 /* LessThanToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8 /* Delete */));
-                this.NoSpaceBetweenCloseParenAndAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create1(18 /* CloseParenToken */, 25 /* LessThanToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8 /* Delete */));
-                this.NoSpaceAfterOpenAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create3(25 /* LessThanToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8 /* Delete */));
-                this.NoSpaceBeforeCloseAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 27 /* GreaterThanToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8 /* Delete */));
-                this.NoSpaceAfterCloseAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create3(27 /* GreaterThanToken */, formatting.Shared.TokenRange.FromTokens([17 /* OpenParenToken */, 19 /* OpenBracketToken */, 27 /* GreaterThanToken */, 24 /* CommaToken */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8 /* Delete */));
-                // Remove spaces in empty interface literals. e.g.: x: {}
-                this.NoSpaceBetweenEmptyInterfaceBraceBrackets = new formatting.Rule(formatting.RuleDescriptor.create1(15 /* OpenBraceToken */, 16 /* CloseBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsObjectTypeContext), 8 /* Delete */));
-                // decorators
-                this.SpaceBeforeAt = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 55 /* AtToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.NoSpaceAfterAt = new formatting.Rule(formatting.RuleDescriptor.create3(55 /* AtToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.SpaceAfterDecorator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.FromTokens([115 /* AbstractKeyword */, 69 /* Identifier */, 82 /* ExportKeyword */, 77 /* DefaultKeyword */, 73 /* ClassKeyword */, 113 /* StaticKeyword */, 112 /* PublicKeyword */, 110 /* PrivateKeyword */, 111 /* ProtectedKeyword */, 123 /* GetKeyword */, 131 /* SetKeyword */, 19 /* OpenBracketToken */, 37 /* AsteriskToken */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsEndOfDecoratorContextOnSameLine), 2 /* Space */));
-                this.NoSpaceBetweenFunctionKeywordAndStar = new formatting.Rule(formatting.RuleDescriptor.create1(87 /* FunctionKeyword */, 37 /* AsteriskToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclarationOrFunctionExpressionContext), 8 /* Delete */));
-                this.SpaceAfterStarInGeneratorDeclaration = new formatting.Rule(formatting.RuleDescriptor.create3(37 /* AsteriskToken */, formatting.Shared.TokenRange.FromTokens([69 /* Identifier */, 17 /* OpenParenToken */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclarationOrFunctionExpressionContext), 2 /* Space */));
-                this.NoSpaceBetweenYieldKeywordAndStar = new formatting.Rule(formatting.RuleDescriptor.create1(114 /* YieldKeyword */, 37 /* AsteriskToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsYieldOrYieldStarWithOperand), 8 /* Delete */));
-                this.SpaceBetweenYieldOrYieldStarAndOperand = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([114 /* YieldKeyword */, 37 /* AsteriskToken */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsYieldOrYieldStarWithOperand), 2 /* Space */));
-                // Async-await
-                this.SpaceBetweenAsyncAndOpenParen = new formatting.Rule(formatting.RuleDescriptor.create1(118 /* AsyncKeyword */, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsArrowFunctionContext, Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.SpaceBetweenAsyncAndFunctionKeyword = new formatting.Rule(formatting.RuleDescriptor.create1(118 /* AsyncKeyword */, 87 /* FunctionKeyword */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                // template string
-                this.NoSpaceBetweenTagAndTemplateString = new formatting.Rule(formatting.RuleDescriptor.create3(69 /* Identifier */, formatting.Shared.TokenRange.FromTokens([11 /* NoSubstitutionTemplateLiteral */, 12 /* TemplateHead */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                // jsx opening element
-                this.SpaceBeforeJsxAttribute = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 69 /* Identifier */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNextTokenParentJsxAttribute, Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.SpaceBeforeSlashInJsxOpeningElement = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 39 /* SlashToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsJsxSelfClosingElementContext, Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.NoSpaceBeforeGreaterThanTokenInJsxOpeningElement = new formatting.Rule(formatting.RuleDescriptor.create1(39 /* SlashToken */, 27 /* GreaterThanToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsJsxSelfClosingElementContext, Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.NoSpaceBeforeEqualInJsxAttribute = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 56 /* EqualsToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsJsxAttributeContext, Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.NoSpaceAfterEqualInJsxAttribute = new formatting.Rule(formatting.RuleDescriptor.create3(56 /* EqualsToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsJsxAttributeContext, Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                // These rules are higher in priority than user-configurable rules.
-                this.HighPriorityCommonRules = [
-                    this.IgnoreBeforeComment, this.IgnoreAfterLineComment,
-                    this.NoSpaceBeforeColon, this.SpaceAfterColon, this.NoSpaceBeforeQuestionMark, this.SpaceAfterQuestionMarkInConditionalOperator,
-                    this.NoSpaceAfterQuestionMark,
-                    this.NoSpaceBeforeDot, this.NoSpaceAfterDot,
-                    this.NoSpaceAfterUnaryPrefixOperator,
-                    this.NoSpaceAfterUnaryPreincrementOperator, this.NoSpaceAfterUnaryPredecrementOperator,
-                    this.NoSpaceBeforeUnaryPostincrementOperator, this.NoSpaceBeforeUnaryPostdecrementOperator,
-                    this.SpaceAfterPostincrementWhenFollowedByAdd,
-                    this.SpaceAfterAddWhenFollowedByUnaryPlus, this.SpaceAfterAddWhenFollowedByPreincrement,
-                    this.SpaceAfterPostdecrementWhenFollowedBySubtract,
-                    this.SpaceAfterSubtractWhenFollowedByUnaryMinus, this.SpaceAfterSubtractWhenFollowedByPredecrement,
-                    this.NoSpaceAfterCloseBrace,
-                    this.NewLineBeforeCloseBraceInBlockContext,
-                    this.SpaceAfterCloseBrace, this.SpaceBetweenCloseBraceAndElse, this.SpaceBetweenCloseBraceAndWhile, this.NoSpaceBetweenEmptyBraceBrackets,
-                    this.NoSpaceBetweenFunctionKeywordAndStar, this.SpaceAfterStarInGeneratorDeclaration,
-                    this.SpaceAfterFunctionInFuncDecl, this.NewLineAfterOpenBraceInBlockContext, this.SpaceAfterGetSetInMember,
-                    this.NoSpaceBetweenYieldKeywordAndStar, this.SpaceBetweenYieldOrYieldStarAndOperand,
-                    this.NoSpaceBetweenReturnAndSemicolon,
-                    this.SpaceAfterCertainKeywords,
-                    this.SpaceAfterLetConstInVariableDeclaration,
-                    this.NoSpaceBeforeOpenParenInFuncCall,
-                    this.SpaceBeforeBinaryKeywordOperator, this.SpaceAfterBinaryKeywordOperator,
-                    this.SpaceAfterVoidOperator,
-                    this.SpaceBetweenAsyncAndOpenParen, this.SpaceBetweenAsyncAndFunctionKeyword,
-                    this.NoSpaceBetweenTagAndTemplateString,
-                    this.SpaceBeforeJsxAttribute, this.SpaceBeforeSlashInJsxOpeningElement, this.NoSpaceBeforeGreaterThanTokenInJsxOpeningElement,
-                    this.NoSpaceBeforeEqualInJsxAttribute, this.NoSpaceAfterEqualInJsxAttribute,
-                    // TypeScript-specific rules
-                    this.NoSpaceAfterConstructor, this.NoSpaceAfterModuleImport,
-                    this.SpaceAfterCertainTypeScriptKeywords, this.SpaceBeforeCertainTypeScriptKeywords,
-                    this.SpaceAfterModuleName,
-                    this.SpaceBeforeArrow, this.SpaceAfterArrow,
-                    this.NoSpaceAfterEllipsis,
-                    this.NoSpaceAfterOptionalParameters,
-                    this.NoSpaceBetweenEmptyInterfaceBraceBrackets,
-                    this.NoSpaceBeforeOpenAngularBracket,
-                    this.NoSpaceBetweenCloseParenAndAngularBracket,
-                    this.NoSpaceAfterOpenAngularBracket,
-                    this.NoSpaceBeforeCloseAngularBracket,
-                    this.NoSpaceAfterCloseAngularBracket,
-                    this.SpaceBeforeAt,
-                    this.NoSpaceAfterAt,
-                    this.SpaceAfterDecorator,
-                ];
-                // These rules are lower in priority than user-configurable rules.
-                this.LowPriorityCommonRules = [
-                    this.NoSpaceBeforeSemicolon,
-                    this.SpaceBeforeOpenBraceInControl, this.SpaceBeforeOpenBraceInFunction, this.SpaceBeforeOpenBraceInTypeScriptDeclWithBlock,
-                    this.NoSpaceBeforeComma,
-                    this.NoSpaceBeforeOpenBracket,
-                    this.NoSpaceAfterCloseBracket,
-                    this.SpaceAfterSemicolon,
-                    this.NoSpaceBeforeOpenParenInFuncDecl,
-                    this.SpaceBetweenStatements, this.SpaceAfterTryFinally
-                ];
-                ///
-                /// Rules controlled by user options
-                ///
-                // Insert space after comma delimiter
-                this.SpaceAfterComma = new formatting.Rule(formatting.RuleDescriptor.create3(24 /* CommaToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNonJsxElementContext, Rules.IsNextTokenNotCloseBracket), 2 /* Space */));
-                this.NoSpaceAfterComma = new formatting.Rule(formatting.RuleDescriptor.create3(24 /* CommaToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNonJsxElementContext), 8 /* Delete */));
-                // Insert space before and after binary operators
-                this.SpaceBeforeBinaryOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.BinaryOperators), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
-                this.SpaceAfterBinaryOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.BinaryOperators, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
-                this.NoSpaceBeforeBinaryOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.BinaryOperators), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 8 /* Delete */));
-                this.NoSpaceAfterBinaryOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.BinaryOperators, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 8 /* Delete */));
-                // Insert space after keywords in control flow statements
-                this.SpaceAfterKeywordInControl = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Keywords, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsControlDeclContext), 2 /* Space */));
-                this.NoSpaceAfterKeywordInControl = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Keywords, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsControlDeclContext), 8 /* Delete */));
-                // Open Brace braces after function
-                // TypeScript: Function can have return types, which can be made of tons of different token kinds
-                this.NewLineBeforeOpenBraceInFunction = new formatting.Rule(formatting.RuleDescriptor.create2(this.FunctionOpenBraceLeftTokenRange, 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext, Rules.IsBeforeMultilineBlockContext), 4 /* NewLine */), 1 /* CanDeleteNewLines */);
-                // Open Brace braces after TypeScript module/class/interface
-                this.NewLineBeforeOpenBraceInTypeScriptDeclWithBlock = new formatting.Rule(formatting.RuleDescriptor.create2(this.TypeScriptOpenBraceLeftTokenRange, 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsTypeScriptDeclWithBlockContext, Rules.IsBeforeMultilineBlockContext), 4 /* NewLine */), 1 /* CanDeleteNewLines */);
-                // Open Brace braces after control block
-                this.NewLineBeforeOpenBraceInControl = new formatting.Rule(formatting.RuleDescriptor.create2(this.ControlOpenBraceLeftTokenRange, 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsControlDeclContext, Rules.IsBeforeMultilineBlockContext), 4 /* NewLine */), 1 /* CanDeleteNewLines */);
-                // Insert space after semicolon in for statement
-                this.SpaceAfterSemicolonInFor = new formatting.Rule(formatting.RuleDescriptor.create3(23 /* SemicolonToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsForContext), 2 /* Space */));
-                this.NoSpaceAfterSemicolonInFor = new formatting.Rule(formatting.RuleDescriptor.create3(23 /* SemicolonToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsForContext), 8 /* Delete */));
-                // Insert space after opening and before closing nonempty parenthesis
-                this.SpaceAfterOpenParen = new formatting.Rule(formatting.RuleDescriptor.create3(17 /* OpenParenToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.SpaceBeforeCloseParen = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 18 /* CloseParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.NoSpaceBetweenParens = new formatting.Rule(formatting.RuleDescriptor.create1(17 /* OpenParenToken */, 18 /* CloseParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.NoSpaceAfterOpenParen = new formatting.Rule(formatting.RuleDescriptor.create3(17 /* OpenParenToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.NoSpaceBeforeCloseParen = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 18 /* CloseParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                // Insert space after opening and before closing nonempty brackets
-                this.SpaceAfterOpenBracket = new formatting.Rule(formatting.RuleDescriptor.create3(19 /* OpenBracketToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.SpaceBeforeCloseBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 20 /* CloseBracketToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.NoSpaceBetweenBrackets = new formatting.Rule(formatting.RuleDescriptor.create1(19 /* OpenBracketToken */, 20 /* CloseBracketToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.NoSpaceAfterOpenBracket = new formatting.Rule(formatting.RuleDescriptor.create3(19 /* OpenBracketToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.NoSpaceBeforeCloseBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 20 /* CloseBracketToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                // Insert space after opening and before closing template string braces
-                this.NoSpaceAfterTemplateHeadAndMiddle = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([12 /* TemplateHead */, 13 /* TemplateMiddle */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.SpaceAfterTemplateHeadAndMiddle = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([12 /* TemplateHead */, 13 /* TemplateMiddle */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.NoSpaceBeforeTemplateMiddleAndTail = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.FromTokens([13 /* TemplateMiddle */, 14 /* TemplateTail */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.SpaceBeforeTemplateMiddleAndTail = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.FromTokens([13 /* TemplateMiddle */, 14 /* TemplateTail */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                // No space after { and before } in JSX expression
-                this.NoSpaceAfterOpenBraceInJsxExpression = new formatting.Rule(formatting.RuleDescriptor.create3(15 /* OpenBraceToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsJsxExpressionContext), 8 /* Delete */));
-                this.SpaceAfterOpenBraceInJsxExpression = new formatting.Rule(formatting.RuleDescriptor.create3(15 /* OpenBraceToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsJsxExpressionContext), 2 /* Space */));
-                this.NoSpaceBeforeCloseBraceInJsxExpression = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 16 /* CloseBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsJsxExpressionContext), 8 /* Delete */));
-                this.SpaceBeforeCloseBraceInJsxExpression = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 16 /* CloseBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsJsxExpressionContext), 2 /* Space */));
-                // Insert space after function keyword for anonymous functions
-                this.SpaceAfterAnonymousFunctionKeyword = new formatting.Rule(formatting.RuleDescriptor.create1(87 /* FunctionKeyword */, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext), 2 /* Space */));
-                this.NoSpaceAfterAnonymousFunctionKeyword = new formatting.Rule(formatting.RuleDescriptor.create1(87 /* FunctionKeyword */, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext), 8 /* Delete */));
-                // No space after type assertion
-                this.NoSpaceAfterTypeAssertion = new formatting.Rule(formatting.RuleDescriptor.create3(27 /* GreaterThanToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeAssertionContext), 8 /* Delete */));
-                this.SpaceAfterTypeAssertion = new formatting.Rule(formatting.RuleDescriptor.create3(27 /* GreaterThanToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeAssertionContext), 2 /* Space */));
             }
-            Rules.prototype.getRuleName = function (rule) {
-                var o = this;
-                for (var name_54 in o) {
-                    if (o[name_54] === rule) {
-                        return name_54;
+            formattingScanner.close();
+            return edits;
+            // local functions
+            /** Tries to compute the indentation for a list element.
+             * If list element is not in range then
+             * function will pick its actual indentation
+             * so it can be pushed downstream as inherited indentation.
+             * If list element is in the range - its indentation will be equal
+             * to inherited indentation from its predecessors.
+             */
+            function tryComputeIndentationForListItem(startPos, endPos, parentStartLine, range, inheritedIndentation) {
+                if (ts.rangeOverlapsWithStartEnd(range, startPos, endPos) ||
+                    ts.rangeContainsStartEnd(range, startPos, endPos) /* Not to miss zero-range nodes e.g. JsxText */) {
+                    if (inheritedIndentation !== -1 /* Unknown */) {
+                        return inheritedIndentation;
                     }
                 }
-                throw new Error("Unknown rule");
-            };
-            ///
-            /// Contexts
-            ///
-            Rules.IsForContext = function (context) {
-                return context.contextNode.kind === 206 /* ForStatement */;
-            };
-            Rules.IsNotForContext = function (context) {
-                return !Rules.IsForContext(context);
-            };
-            Rules.IsBinaryOpContext = function (context) {
-                switch (context.contextNode.kind) {
-                    case 187 /* BinaryExpression */:
-                    case 188 /* ConditionalExpression */:
-                    case 195 /* AsExpression */:
-                    case 238 /* ExportSpecifier */:
-                    case 234 /* ImportSpecifier */:
-                    case 154 /* TypePredicate */:
-                    case 162 /* UnionType */:
-                    case 163 /* IntersectionType */:
-                        return true;
-                    // equals in binding elements: function foo([[x, y] = [1, 2]])
-                    case 169 /* BindingElement */:
-                    // equals in type X = ...
-                    case 223 /* TypeAliasDeclaration */:
-                    // equal in import a = module('a');
-                    case 229 /* ImportEqualsDeclaration */:
-                    // equal in let a = 0;
-                    case 218 /* VariableDeclaration */:
-                    // equal in p = 0;
-                    case 142 /* Parameter */:
-                    case 255 /* EnumMember */:
-                    case 145 /* PropertyDeclaration */:
-                    case 144 /* PropertySignature */:
-                        return context.currentTokenSpan.kind === 56 /* EqualsToken */ || context.nextTokenSpan.kind === 56 /* EqualsToken */;
-                    // "in" keyword in for (let x in []) { }
-                    case 207 /* ForInStatement */:
-                        return context.currentTokenSpan.kind === 90 /* InKeyword */ || context.nextTokenSpan.kind === 90 /* InKeyword */;
-                    // Technically, "of" is not a binary operator, but format it the same way as "in"
-                    case 208 /* ForOfStatement */:
-                        return context.currentTokenSpan.kind === 138 /* OfKeyword */ || context.nextTokenSpan.kind === 138 /* OfKeyword */;
+                else {
+                    var startLine = sourceFile.getLineAndCharacterOfPosition(startPos).line;
+                    var startLinePosition = ts.getLineStartPositionForPosition(startPos, sourceFile);
+                    var column = formatting.SmartIndenter.findFirstNonWhitespaceColumn(startLinePosition, startPos, sourceFile, options);
+                    if (startLine !== parentStartLine || startPos === column) {
+                        // Use the base indent size if it is greater than
+                        // the indentation of the inherited predecessor.
+                        var baseIndentSize = formatting.SmartIndenter.getBaseIndentation(options);
+                        return baseIndentSize > column ? baseIndentSize : column;
+                    }
                 }
-                return false;
-            };
-            Rules.IsNotBinaryOpContext = function (context) {
-                return !Rules.IsBinaryOpContext(context);
-            };
-            Rules.IsConditionalOperatorContext = function (context) {
-                return context.contextNode.kind === 188 /* ConditionalExpression */;
-            };
-            Rules.IsSameLineTokenOrBeforeMultilineBlockContext = function (context) {
-                //// This check is mainly used inside SpaceBeforeOpenBraceInControl and SpaceBeforeOpenBraceInFunction.
-                ////
-                //// Ex:
-                //// if (1)     { ....
-                ////      * ) and { are on the same line so apply the rule. Here we don't care whether it's same or multi block context
-                ////
-                //// Ex:
-                //// if (1)
-                //// { ... }
-                ////      * ) and { are on different lines. We only need to format if the block is multiline context. So in this case we don't format.
-                ////
-                //// Ex:
-                //// if (1)
-                //// { ...
-                //// }
-                ////      * ) and { are on different lines. We only need to format if the block is multiline context. So in this case we format.
-                return context.TokensAreOnSameLine() || Rules.IsBeforeMultilineBlockContext(context);
-            };
-            // This check is done before an open brace in a control construct, a function, or a typescript block declaration
-            Rules.IsBeforeMultilineBlockContext = function (context) {
-                return Rules.IsBeforeBlockContext(context) && !(context.NextNodeAllOnSameLine() || context.NextNodeBlockIsOnOneLine());
-            };
-            Rules.IsMultilineBlockContext = function (context) {
-                return Rules.IsBlockContext(context) && !(context.ContextNodeAllOnSameLine() || context.ContextNodeBlockIsOnOneLine());
-            };
-            Rules.IsSingleLineBlockContext = function (context) {
-                return Rules.IsBlockContext(context) && (context.ContextNodeAllOnSameLine() || context.ContextNodeBlockIsOnOneLine());
-            };
-            Rules.IsBlockContext = function (context) {
-                return Rules.NodeIsBlockContext(context.contextNode);
-            };
-            Rules.IsBeforeBlockContext = function (context) {
-                return Rules.NodeIsBlockContext(context.nextTokenParent);
-            };
-            // IMPORTANT!!! This method must return true ONLY for nodes with open and close braces as immediate children
-            Rules.NodeIsBlockContext = function (node) {
-                if (Rules.NodeIsTypeScriptDeclWithBlockContext(node)) {
-                    // This means we are in a context that looks like a block to the user, but in the grammar is actually not a node (it's a class, module, enum, object type literal, etc).
-                    return true;
+                return -1 /* Unknown */;
+            }
+            function computeIndentation(node, startLine, inheritedIndentation, parent, parentDynamicIndentation, effectiveParentStartLine) {
+                var indentation = inheritedIndentation;
+                var delta = formatting.SmartIndenter.shouldIndentChildNode(node) ? options.indentSize : 0;
+                if (effectiveParentStartLine === startLine) {
+                    // if node is located on the same line with the parent
+                    // - inherit indentation from the parent
+                    // - push children if either parent of node itself has non-zero delta
+                    indentation = startLine === lastIndentedLine
+                        ? indentationOnLastIndentedLine
+                        : parentDynamicIndentation.getIndentation();
+                    delta = Math.min(options.indentSize, parentDynamicIndentation.getDelta(node) + delta);
                 }
-                switch (node.kind) {
-                    case 199 /* Block */:
-                    case 227 /* CaseBlock */:
-                    case 171 /* ObjectLiteralExpression */:
-                    case 226 /* ModuleBlock */:
-                        return true;
+                else if (indentation === -1 /* Unknown */) {
+                    if (formatting.SmartIndenter.childStartsOnTheSameLineWithElseInIfStatement(parent, node, startLine, sourceFile)) {
+                        indentation = parentDynamicIndentation.getIndentation();
+                    }
+                    else {
+                        indentation = parentDynamicIndentation.getIndentation() + parentDynamicIndentation.getDelta(node);
+                    }
                 }
-                return false;
-            };
-            Rules.IsFunctionDeclContext = function (context) {
-                switch (context.contextNode.kind) {
-                    case 220 /* FunctionDeclaration */:
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                    // case SyntaxKind.MemberFunctionDeclaration:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                    // case SyntaxKind.MethodSignature:
-                    case 151 /* CallSignature */:
-                    case 179 /* FunctionExpression */:
-                    case 148 /* Constructor */:
-                    case 180 /* ArrowFunction */:
-                    // case SyntaxKind.ConstructorDeclaration:
-                    // case SyntaxKind.SimpleArrowFunctionExpression:
-                    // case SyntaxKind.ParenthesizedArrowFunctionExpression:
-                    case 222 /* InterfaceDeclaration */:
-                        return true;
+                return {
+                    indentation: indentation,
+                    delta: delta
+                };
+            }
+            function getFirstNonDecoratorTokenOfNode(node) {
+                if (node.modifiers && node.modifiers.length) {
+                    return node.modifiers[0].kind;
                 }
-                return false;
-            };
-            Rules.IsFunctionDeclarationOrFunctionExpressionContext = function (context) {
-                return context.contextNode.kind === 220 /* FunctionDeclaration */ || context.contextNode.kind === 179 /* FunctionExpression */;
-            };
-            Rules.IsTypeScriptDeclWithBlockContext = function (context) {
-                return Rules.NodeIsTypeScriptDeclWithBlockContext(context.contextNode);
-            };
-            Rules.NodeIsTypeScriptDeclWithBlockContext = function (node) {
                 switch (node.kind) {
-                    case 221 /* ClassDeclaration */:
-                    case 192 /* ClassExpression */:
-                    case 222 /* InterfaceDeclaration */:
-                    case 224 /* EnumDeclaration */:
-                    case 159 /* TypeLiteral */:
-                    case 225 /* ModuleDeclaration */:
-                    case 236 /* ExportDeclaration */:
-                    case 237 /* NamedExports */:
-                    case 230 /* ImportDeclaration */:
-                    case 233 /* NamedImports */:
-                        return true;
+                    case 229 /* ClassDeclaration */: return 75 /* ClassKeyword */;
+                    case 230 /* InterfaceDeclaration */: return 109 /* InterfaceKeyword */;
+                    case 228 /* FunctionDeclaration */: return 89 /* FunctionKeyword */;
+                    case 232 /* EnumDeclaration */: return 232 /* EnumDeclaration */;
+                    case 153 /* GetAccessor */: return 125 /* GetKeyword */;
+                    case 154 /* SetAccessor */: return 135 /* SetKeyword */;
+                    case 151 /* MethodDeclaration */:
+                        if (node.asteriskToken) {
+                            return 39 /* AsteriskToken */;
+                        }
+                    // falls through
+                    case 149 /* PropertyDeclaration */:
+                    case 146 /* Parameter */:
+                        return ts.getNameOfDeclaration(node).kind;
                 }
-                return false;
-            };
-            Rules.IsAfterCodeBlockContext = function (context) {
-                switch (context.currentTokenParent.kind) {
-                    case 221 /* ClassDeclaration */:
-                    case 225 /* ModuleDeclaration */:
-                    case 224 /* EnumDeclaration */:
-                    case 199 /* Block */:
-                    case 252 /* CatchClause */:
-                    case 226 /* ModuleBlock */:
-                    case 213 /* SwitchStatement */:
-                        return true;
+            }
+            function getDynamicIndentation(node, nodeStartLine, indentation, delta) {
+                return {
+                    getIndentationForComment: function (kind, tokenIndentation, container) {
+                        switch (kind) {
+                            // preceding comment to the token that closes the indentation scope inherits the indentation from the scope
+                            // ..  {
+                            //     // comment
+                            // }
+                            case 18 /* CloseBraceToken */:
+                            case 22 /* CloseBracketToken */:
+                            case 20 /* CloseParenToken */:
+                                return indentation + getEffectiveDelta(delta, container);
+                        }
+                        return tokenIndentation !== -1 /* Unknown */ ? tokenIndentation : indentation;
+                    },
+                    getIndentationForToken: function (line, kind, container) {
+                        if (nodeStartLine !== line && node.decorators) {
+                            if (kind === getFirstNonDecoratorTokenOfNode(node)) {
+                                // if this token is the first token following the list of decorators, we do not need to indent
+                                return indentation;
+                            }
+                        }
+                        switch (kind) {
+                            // open and close brace, 'else' and 'while' (in do statement) tokens has indentation of the parent
+                            case 17 /* OpenBraceToken */:
+                            case 18 /* CloseBraceToken */:
+                            case 19 /* OpenParenToken */:
+                            case 20 /* CloseParenToken */:
+                            case 82 /* ElseKeyword */:
+                            case 106 /* WhileKeyword */:
+                            case 57 /* AtToken */:
+                                return indentation;
+                            case 41 /* SlashToken */:
+                            case 29 /* GreaterThanToken */: {
+                                if (container.kind === 251 /* JsxOpeningElement */ ||
+                                    container.kind === 252 /* JsxClosingElement */ ||
+                                    container.kind === 250 /* JsxSelfClosingElement */) {
+                                    return indentation;
+                                }
+                                break;
+                            }
+                            case 21 /* OpenBracketToken */:
+                            case 22 /* CloseBracketToken */: {
+                                if (container.kind !== 172 /* MappedType */) {
+                                    return indentation;
+                                }
+                                break;
+                            }
+                        }
+                        // if token line equals to the line of containing node (this is a first token in the node) - use node indentation
+                        return nodeStartLine !== line ? indentation + getEffectiveDelta(delta, container) : indentation;
+                    },
+                    getIndentation: function () { return indentation; },
+                    getDelta: function (child) { return getEffectiveDelta(delta, child); },
+                    recomputeIndentation: function (lineAdded) {
+                        if (node.parent && formatting.SmartIndenter.shouldIndentChildNode(node.parent, node)) {
+                            if (lineAdded) {
+                                indentation += options.indentSize;
+                            }
+                            else {
+                                indentation -= options.indentSize;
+                            }
+                            if (formatting.SmartIndenter.shouldIndentChildNode(node)) {
+                                delta = options.indentSize;
+                            }
+                            else {
+                                delta = 0;
+                            }
+                        }
+                    }
+                };
+                function getEffectiveDelta(delta, child) {
+                    // Delta value should be zero when the node explicitly prevents indentation of the child node
+                    return formatting.SmartIndenter.nodeWillIndentChild(node, child, /*indentByDefault*/ true) ? delta : 0;
                 }
-                return false;
-            };
-            Rules.IsControlDeclContext = function (context) {
-                switch (context.contextNode.kind) {
-                    case 203 /* IfStatement */:
-                    case 213 /* SwitchStatement */:
-                    case 206 /* ForStatement */:
-                    case 207 /* ForInStatement */:
-                    case 208 /* ForOfStatement */:
-                    case 205 /* WhileStatement */:
-                    case 216 /* TryStatement */:
-                    case 204 /* DoStatement */:
-                    case 212 /* WithStatement */:
-                    // TODO
-                    // case SyntaxKind.ElseClause:
-                    case 252 /* CatchClause */:
-                        return true;
-                    default:
-                        return false;
+            }
+            function processNode(node, contextNode, nodeStartLine, undecoratedNodeStartLine, indentation, delta) {
+                if (!ts.rangeOverlapsWithStartEnd(originalRange, node.getStart(sourceFile), node.getEnd())) {
+                    return;
                 }
-            };
-            Rules.IsObjectContext = function (context) {
-                return context.contextNode.kind === 171 /* ObjectLiteralExpression */;
-            };
-            Rules.IsFunctionCallContext = function (context) {
-                return context.contextNode.kind === 174 /* CallExpression */;
-            };
-            Rules.IsNewContext = function (context) {
-                return context.contextNode.kind === 175 /* NewExpression */;
-            };
-            Rules.IsFunctionCallOrNewContext = function (context) {
-                return Rules.IsFunctionCallContext(context) || Rules.IsNewContext(context);
-            };
-            Rules.IsPreviousTokenNotComma = function (context) {
-                return context.currentTokenSpan.kind !== 24 /* CommaToken */;
-            };
-            Rules.IsNextTokenNotCloseBracket = function (context) {
-                return context.nextTokenSpan.kind !== 20 /* CloseBracketToken */;
-            };
-            Rules.IsArrowFunctionContext = function (context) {
-                return context.contextNode.kind === 180 /* ArrowFunction */;
-            };
-            Rules.IsNonJsxSameLineTokenContext = function (context) {
-                return context.TokensAreOnSameLine() && context.contextNode.kind !== 244 /* JsxText */;
-            };
-            Rules.IsNonJsxElementContext = function (context) {
-                return context.contextNode.kind !== 241 /* JsxElement */;
-            };
-            Rules.IsJsxExpressionContext = function (context) {
-                return context.contextNode.kind === 248 /* JsxExpression */;
-            };
-            Rules.IsNextTokenParentJsxAttribute = function (context) {
-                return context.nextTokenParent.kind === 246 /* JsxAttribute */;
-            };
-            Rules.IsJsxAttributeContext = function (context) {
-                return context.contextNode.kind === 246 /* JsxAttribute */;
-            };
-            Rules.IsJsxSelfClosingElementContext = function (context) {
-                return context.contextNode.kind === 242 /* JsxSelfClosingElement */;
-            };
-            Rules.IsNotBeforeBlockInFunctionDeclarationContext = function (context) {
-                return !Rules.IsFunctionDeclContext(context) && !Rules.IsBeforeBlockContext(context);
-            };
-            Rules.IsEndOfDecoratorContextOnSameLine = function (context) {
-                return context.TokensAreOnSameLine() &&
-                    context.contextNode.decorators &&
-                    Rules.NodeIsInDecoratorContext(context.currentTokenParent) &&
-                    !Rules.NodeIsInDecoratorContext(context.nextTokenParent);
-            };
-            Rules.NodeIsInDecoratorContext = function (node) {
-                while (ts.isPartOfExpression(node)) {
-                    node = node.parent;
+                var nodeDynamicIndentation = getDynamicIndentation(node, nodeStartLine, indentation, delta);
+                // a useful observations when tracking context node
+                //        /
+                //      [a]
+                //   /   |   \
+                //  [b] [c] [d]
+                // node 'a' is a context node for nodes 'b', 'c', 'd'
+                // except for the leftmost leaf token in [b] - in this case context node ('e') is located somewhere above 'a'
+                // this rule can be applied recursively to child nodes of 'a'.
+                //
+                // context node is set to parent node value after processing every child node
+                // context node is set to parent of the token after processing every token
+                var childContextNode = contextNode;
+                // if there are any tokens that logically belong to node and interleave child nodes
+                // such tokens will be consumed in processChildNode for for the child that follows them
+                ts.forEachChild(node, function (child) {
+                    processChildNode(child, /*inheritedIndentation*/ -1 /* Unknown */, node, nodeDynamicIndentation, nodeStartLine, undecoratedNodeStartLine, /*isListItem*/ false);
+                }, function (nodes) {
+                    processChildNodes(nodes, node, nodeStartLine, nodeDynamicIndentation);
+                });
+                // proceed any tokens in the node that are located after child nodes
+                while (formattingScanner.isOnToken()) {
+                    var tokenInfo = formattingScanner.readTokenInfo(node);
+                    if (tokenInfo.token.end > node.end) {
+                        break;
+                    }
+                    consumeTokenAndAdvanceScanner(tokenInfo, node, nodeDynamicIndentation, node);
                 }
-                return node.kind === 143 /* Decorator */;
-            };
-            Rules.IsStartOfVariableDeclarationList = function (context) {
-                return context.currentTokenParent.kind === 219 /* VariableDeclarationList */ &&
-                    context.currentTokenParent.getStart(context.sourceFile) === context.currentTokenSpan.pos;
-            };
-            Rules.IsNotFormatOnEnter = function (context) {
-                return context.formattingRequestKind !== 2 /* FormatOnEnter */;
-            };
-            Rules.IsModuleDeclContext = function (context) {
-                return context.contextNode.kind === 225 /* ModuleDeclaration */;
-            };
-            Rules.IsObjectTypeContext = function (context) {
-                return context.contextNode.kind === 159 /* TypeLiteral */; // && context.contextNode.parent.kind !== SyntaxKind.InterfaceDeclaration;
-            };
-            Rules.IsTypeArgumentOrParameterOrAssertion = function (token, parent) {
-                if (token.kind !== 25 /* LessThanToken */ && token.kind !== 27 /* GreaterThanToken */) {
-                    return false;
+                function processChildNode(child, inheritedIndentation, parent, parentDynamicIndentation, parentStartLine, undecoratedParentStartLine, isListItem, isFirstListItem) {
+                    var childStartPos = child.getStart(sourceFile);
+                    var childStartLine = sourceFile.getLineAndCharacterOfPosition(childStartPos).line;
+                    var undecoratedChildStartLine = childStartLine;
+                    if (child.decorators) {
+                        undecoratedChildStartLine = sourceFile.getLineAndCharacterOfPosition(ts.getNonDecoratorTokenPosOfNode(child, sourceFile)).line;
+                    }
+                    // if child is a list item - try to get its indentation
+                    var childIndentationAmount = -1 /* Unknown */;
+                    if (isListItem) {
+                        childIndentationAmount = tryComputeIndentationForListItem(childStartPos, child.end, parentStartLine, originalRange, inheritedIndentation);
+                        if (childIndentationAmount !== -1 /* Unknown */) {
+                            inheritedIndentation = childIndentationAmount;
+                        }
+                    }
+                    // child node is outside the target range - do not dive inside
+                    if (!ts.rangeOverlapsWithStartEnd(originalRange, child.pos, child.end)) {
+                        if (child.end < originalRange.pos) {
+                            formattingScanner.skipToEndOf(child);
+                        }
+                        return inheritedIndentation;
+                    }
+                    if (child.getFullWidth() === 0) {
+                        return inheritedIndentation;
+                    }
+                    while (formattingScanner.isOnToken()) {
+                        // proceed any parent tokens that are located prior to child.getStart()
+                        var tokenInfo = formattingScanner.readTokenInfo(node);
+                        if (tokenInfo.token.end > childStartPos) {
+                            // stop when formatting scanner advances past the beginning of the child
+                            break;
+                        }
+                        consumeTokenAndAdvanceScanner(tokenInfo, node, parentDynamicIndentation, node);
+                    }
+                    if (!formattingScanner.isOnToken()) {
+                        return inheritedIndentation;
+                    }
+                    // JSX text shouldn't affect indenting
+                    if (ts.isToken(child) && child.kind !== 10 /* JsxText */) {
+                        // if child node is a token, it does not impact indentation, proceed it using parent indentation scope rules
+                        var tokenInfo = formattingScanner.readTokenInfo(child);
+                        ts.Debug.assert(tokenInfo.token.end === child.end, "Token end is child end");
+                        consumeTokenAndAdvanceScanner(tokenInfo, node, parentDynamicIndentation, child);
+                        return inheritedIndentation;
+                    }
+                    var effectiveParentStartLine = child.kind === 147 /* Decorator */ ? childStartLine : undecoratedParentStartLine;
+                    var childIndentation = computeIndentation(child, childStartLine, childIndentationAmount, node, parentDynamicIndentation, effectiveParentStartLine);
+                    processNode(child, childContextNode, childStartLine, undecoratedChildStartLine, childIndentation.indentation, childIndentation.delta);
+                    childContextNode = node;
+                    if (isFirstListItem && parent.kind === 177 /* ArrayLiteralExpression */ && inheritedIndentation === -1 /* Unknown */) {
+                        inheritedIndentation = childIndentation.indentation;
+                    }
+                    return inheritedIndentation;
                 }
-                switch (parent.kind) {
-                    case 155 /* TypeReference */:
-                    case 177 /* TypeAssertionExpression */:
-                    case 221 /* ClassDeclaration */:
-                    case 192 /* ClassExpression */:
-                    case 222 /* InterfaceDeclaration */:
-                    case 220 /* FunctionDeclaration */:
-                    case 179 /* FunctionExpression */:
-                    case 180 /* ArrowFunction */:
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                    case 151 /* CallSignature */:
-                    case 152 /* ConstructSignature */:
-                    case 174 /* CallExpression */:
-                    case 175 /* NewExpression */:
-                    case 194 /* ExpressionWithTypeArguments */:
-                        return true;
-                    default:
-                        return false;
+                function processChildNodes(nodes, parent, parentStartLine, parentDynamicIndentation) {
+                    var listStartToken = getOpenTokenForList(parent, nodes);
+                    var listEndToken = getCloseTokenForOpenToken(listStartToken);
+                    var listDynamicIndentation = parentDynamicIndentation;
+                    var startLine = parentStartLine;
+                    if (listStartToken !== 0 /* Unknown */) {
+                        // introduce a new indentation scope for lists (including list start and end tokens)
+                        while (formattingScanner.isOnToken()) {
+                            var tokenInfo = formattingScanner.readTokenInfo(parent);
+                            if (tokenInfo.token.end > nodes.pos) {
+                                // stop when formatting scanner moves past the beginning of node list
+                                break;
+                            }
+                            else if (tokenInfo.token.kind === listStartToken) {
+                                // consume list start token
+                                startLine = sourceFile.getLineAndCharacterOfPosition(tokenInfo.token.pos).line;
+                                var indentation_1 = computeIndentation(tokenInfo.token, startLine, -1 /* Unknown */, parent, parentDynamicIndentation, parentStartLine);
+                                listDynamicIndentation = getDynamicIndentation(parent, parentStartLine, indentation_1.indentation, indentation_1.delta);
+                                consumeTokenAndAdvanceScanner(tokenInfo, parent, listDynamicIndentation, parent);
+                            }
+                            else {
+                                // consume any tokens that precede the list as child elements of 'node' using its indentation scope
+                                consumeTokenAndAdvanceScanner(tokenInfo, parent, parentDynamicIndentation, parent);
+                            }
+                        }
+                    }
+                    var inheritedIndentation = -1 /* Unknown */;
+                    for (var i = 0; i < nodes.length; i++) {
+                        var child = nodes[i];
+                        inheritedIndentation = processChildNode(child, inheritedIndentation, node, listDynamicIndentation, startLine, startLine, /*isListItem*/ true, /*isFirstListItem*/ i === 0);
+                    }
+                    if (listEndToken !== 0 /* Unknown */) {
+                        if (formattingScanner.isOnToken()) {
+                            var tokenInfo = formattingScanner.readTokenInfo(parent);
+                            // consume the list end token only if it is still belong to the parent
+                            // there might be the case when current token matches end token but does not considered as one
+                            // function (x: function) <--
+                            // without this check close paren will be interpreted as list end token for function expression which is wrong
+                            if (tokenInfo.token.kind === listEndToken && ts.rangeContainsRange(parent, tokenInfo.token)) {
+                                // consume list end token
+                                consumeTokenAndAdvanceScanner(tokenInfo, parent, listDynamicIndentation, parent);
+                            }
+                        }
+                    }
                 }
-            };
-            Rules.IsTypeArgumentOrParameterOrAssertionContext = function (context) {
-                return Rules.IsTypeArgumentOrParameterOrAssertion(context.currentTokenSpan, context.currentTokenParent) ||
-                    Rules.IsTypeArgumentOrParameterOrAssertion(context.nextTokenSpan, context.nextTokenParent);
-            };
-            Rules.IsTypeAssertionContext = function (context) {
-                return context.contextNode.kind === 177 /* TypeAssertionExpression */;
-            };
-            Rules.IsVoidOpContext = function (context) {
-                return context.currentTokenSpan.kind === 103 /* VoidKeyword */ && context.currentTokenParent.kind === 183 /* VoidExpression */;
-            };
-            Rules.IsYieldOrYieldStarWithOperand = function (context) {
-                return context.contextNode.kind === 190 /* YieldExpression */ && context.contextNode.expression !== undefined;
-            };
-            return Rules;
-        }());
-        formatting.Rules = Rules;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-///<reference path='references.ts' />
-/* @internal */
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var RulesMap = (function () {
-            function RulesMap() {
-                this.map = [];
-                this.mapRowLength = 0;
-            }
-            RulesMap.create = function (rules) {
-                var result = new RulesMap();
-                result.Initialize(rules);
-                return result;
-            };
-            RulesMap.prototype.Initialize = function (rules) {
-                this.mapRowLength = 138 /* LastToken */ + 1;
-                this.map = new Array(this.mapRowLength * this.mapRowLength); // new Array<RulesBucket>(this.mapRowLength * this.mapRowLength);
-                // This array is used only during construction of the rulesbucket in the map
-                var rulesBucketConstructionStateList = new Array(this.map.length); // new Array<RulesBucketConstructionState>(this.map.length);
-                this.FillRules(rules, rulesBucketConstructionStateList);
-                return this.map;
-            };
-            RulesMap.prototype.FillRules = function (rules, rulesBucketConstructionStateList) {
-                var _this = this;
-                rules.forEach(function (rule) {
-                    _this.FillRule(rule, rulesBucketConstructionStateList);
-                });
-            };
-            RulesMap.prototype.GetRuleBucketIndex = function (row, column) {
-                var rulesBucketIndex = (row * this.mapRowLength) + column;
-                // Debug.Assert(rulesBucketIndex < this.map.Length, "Trying to access an index outside the array.");
-                return rulesBucketIndex;
-            };
-            RulesMap.prototype.FillRule = function (rule, rulesBucketConstructionStateList) {
-                var _this = this;
-                var specificRule = rule.Descriptor.LeftTokenRange !== formatting.Shared.TokenRange.Any &&
-                    rule.Descriptor.RightTokenRange !== formatting.Shared.TokenRange.Any;
-                rule.Descriptor.LeftTokenRange.GetTokens().forEach(function (left) {
-                    rule.Descriptor.RightTokenRange.GetTokens().forEach(function (right) {
-                        var rulesBucketIndex = _this.GetRuleBucketIndex(left, right);
-                        var rulesBucket = _this.map[rulesBucketIndex];
-                        if (rulesBucket === undefined) {
-                            rulesBucket = _this.map[rulesBucketIndex] = new RulesBucket();
+                function consumeTokenAndAdvanceScanner(currentTokenInfo, parent, dynamicIndentation, container) {
+                    ts.Debug.assert(ts.rangeContainsRange(parent, currentTokenInfo.token));
+                    var lastTriviaWasNewLine = formattingScanner.lastTrailingTriviaWasNewLine();
+                    var indentToken = false;
+                    if (currentTokenInfo.leadingTrivia) {
+                        processTrivia(currentTokenInfo.leadingTrivia, parent, childContextNode, dynamicIndentation);
+                    }
+                    var lineAdded;
+                    var isTokenInRange = ts.rangeContainsRange(originalRange, currentTokenInfo.token);
+                    var tokenStart = sourceFile.getLineAndCharacterOfPosition(currentTokenInfo.token.pos);
+                    if (isTokenInRange) {
+                        var rangeHasError = rangeContainsError(currentTokenInfo.token);
+                        // save previousRange since processRange will overwrite this value with current one
+                        var savePreviousRange = previousRange;
+                        lineAdded = processRange(currentTokenInfo.token, tokenStart, parent, childContextNode, dynamicIndentation);
+                        if (rangeHasError) {
+                            // do not indent comments\token if token range overlaps with some error
+                            indentToken = false;
                         }
-                        rulesBucket.AddRule(rule, specificRule, rulesBucketConstructionStateList, rulesBucketIndex);
-                    });
-                });
-            };
-            RulesMap.prototype.GetRule = function (context) {
-                var bucketIndex = this.GetRuleBucketIndex(context.currentTokenSpan.kind, context.nextTokenSpan.kind);
-                var bucket = this.map[bucketIndex];
-                if (bucket) {
-                    for (var _i = 0, _a = bucket.Rules(); _i < _a.length; _i++) {
-                        var rule = _a[_i];
-                        if (rule.Operation.Context.InContext(context)) {
-                            return rule;
+                        else {
+                            if (lineAdded !== undefined) {
+                                indentToken = lineAdded;
+                            }
+                            else {
+                                // indent token only if end line of previous range does not match start line of the token
+                                var prevEndLine = savePreviousRange && sourceFile.getLineAndCharacterOfPosition(savePreviousRange.end).line;
+                                indentToken = lastTriviaWasNewLine && tokenStart.line !== prevEndLine;
+                            }
+                        }
+                    }
+                    if (currentTokenInfo.trailingTrivia) {
+                        processTrivia(currentTokenInfo.trailingTrivia, parent, childContextNode, dynamicIndentation);
+                    }
+                    if (indentToken) {
+                        var tokenIndentation = (isTokenInRange && !rangeContainsError(currentTokenInfo.token)) ?
+                            dynamicIndentation.getIndentationForToken(tokenStart.line, currentTokenInfo.token.kind, container) :
+                            -1 /* Unknown */;
+                        var indentNextTokenOrTrivia = true;
+                        if (currentTokenInfo.leadingTrivia) {
+                            var commentIndentation = dynamicIndentation.getIndentationForComment(currentTokenInfo.token.kind, tokenIndentation, container);
+                            for (var _i = 0, _a = currentTokenInfo.leadingTrivia; _i < _a.length; _i++) {
+                                var triviaItem = _a[_i];
+                                var triviaInRange = ts.rangeContainsRange(originalRange, triviaItem);
+                                switch (triviaItem.kind) {
+                                    case 3 /* MultiLineCommentTrivia */:
+                                        if (triviaInRange) {
+                                            indentMultilineComment(triviaItem, commentIndentation, /*firstLineIsIndented*/ !indentNextTokenOrTrivia);
+                                        }
+                                        indentNextTokenOrTrivia = false;
+                                        break;
+                                    case 2 /* SingleLineCommentTrivia */:
+                                        if (indentNextTokenOrTrivia && triviaInRange) {
+                                            insertIndentation(triviaItem.pos, commentIndentation, /*lineAdded*/ false);
+                                        }
+                                        indentNextTokenOrTrivia = false;
+                                        break;
+                                    case 4 /* NewLineTrivia */:
+                                        indentNextTokenOrTrivia = true;
+                                        break;
+                                }
+                            }
+                        }
+                        // indent token only if is it is in target range and does not overlap with any error ranges
+                        if (tokenIndentation !== -1 /* Unknown */ && indentNextTokenOrTrivia) {
+                            insertIndentation(currentTokenInfo.token.pos, tokenIndentation, lineAdded);
+                            lastIndentedLine = tokenStart.line;
+                            indentationOnLastIndentedLine = tokenIndentation;
                         }
                     }
+                    formattingScanner.advance();
+                    childContextNode = parent;
                 }
-                return undefined;
-            };
-            return RulesMap;
-        }());
-        formatting.RulesMap = RulesMap;
-        var MaskBitSize = 5;
-        var Mask = 0x1f;
-        (function (RulesPosition) {
-            RulesPosition[RulesPosition["IgnoreRulesSpecific"] = 0] = "IgnoreRulesSpecific";
-            RulesPosition[RulesPosition["IgnoreRulesAny"] = MaskBitSize * 1] = "IgnoreRulesAny";
-            RulesPosition[RulesPosition["ContextRulesSpecific"] = MaskBitSize * 2] = "ContextRulesSpecific";
-            RulesPosition[RulesPosition["ContextRulesAny"] = MaskBitSize * 3] = "ContextRulesAny";
-            RulesPosition[RulesPosition["NoContextRulesSpecific"] = MaskBitSize * 4] = "NoContextRulesSpecific";
-            RulesPosition[RulesPosition["NoContextRulesAny"] = MaskBitSize * 5] = "NoContextRulesAny";
-        })(formatting.RulesPosition || (formatting.RulesPosition = {}));
-        var RulesPosition = formatting.RulesPosition;
-        var RulesBucketConstructionState = (function () {
-            function RulesBucketConstructionState() {
-                //// The Rules list contains all the inserted rules into a rulebucket in the following order:
-                ////    1- Ignore rules with specific token combination
-                ////    2- Ignore rules with any token combination
-                ////    3- Context rules with specific token combination
-                ////    4- Context rules with any token combination
-                ////    5- Non-context rules with specific token combination
-                ////    6- Non-context rules with any token combination
-                ////
-                //// The member rulesInsertionIndexBitmap is used to describe the number of rules
-                //// in each sub-bucket (above) hence can be used to know the index of where to insert
-                //// the next rule. It's a bitmap which contains 6 different sections each is given 5 bits.
-                ////
-                //// Example:
-                //// In order to insert a rule to the end of sub-bucket (3), we get the index by adding
-                //// the values in the bitmap segments 3rd, 2nd, and 1st.
-                this.rulesInsertionIndexBitmap = 0;
             }
-            RulesBucketConstructionState.prototype.GetInsertionIndex = function (maskPosition) {
-                var index = 0;
-                var pos = 0;
-                var indexBitmap = this.rulesInsertionIndexBitmap;
-                while (pos <= maskPosition) {
-                    index += (indexBitmap & Mask);
-                    indexBitmap >>= MaskBitSize;
-                    pos += MaskBitSize;
+            function processTrivia(trivia, parent, contextNode, dynamicIndentation) {
+                for (var _i = 0, trivia_1 = trivia; _i < trivia_1.length; _i++) {
+                    var triviaItem = trivia_1[_i];
+                    if (ts.isComment(triviaItem.kind) && ts.rangeContainsRange(originalRange, triviaItem)) {
+                        var triviaItemStart = sourceFile.getLineAndCharacterOfPosition(triviaItem.pos);
+                        processRange(triviaItem, triviaItemStart, parent, contextNode, dynamicIndentation);
+                    }
                 }
-                return index;
-            };
-            RulesBucketConstructionState.prototype.IncreaseInsertionIndex = function (maskPosition) {
-                var value = (this.rulesInsertionIndexBitmap >> maskPosition) & Mask;
-                value++;
-                ts.Debug.assert((value & Mask) === value, "Adding more rules into the sub-bucket than allowed. Maximum allowed is 32 rules.");
-                var temp = this.rulesInsertionIndexBitmap & ~(Mask << maskPosition);
-                temp |= value << maskPosition;
-                this.rulesInsertionIndexBitmap = temp;
-            };
-            return RulesBucketConstructionState;
-        }());
-        formatting.RulesBucketConstructionState = RulesBucketConstructionState;
-        var RulesBucket = (function () {
-            function RulesBucket() {
-                this.rules = [];
             }
-            RulesBucket.prototype.Rules = function () {
-                return this.rules;
-            };
-            RulesBucket.prototype.AddRule = function (rule, specificTokens, constructionState, rulesBucketIndex) {
-                var position;
-                if (rule.Operation.Action === 1 /* Ignore */) {
-                    position = specificTokens ?
-                        RulesPosition.IgnoreRulesSpecific :
-                        RulesPosition.IgnoreRulesAny;
-                }
-                else if (!rule.Operation.Context.IsAny()) {
-                    position = specificTokens ?
-                        RulesPosition.ContextRulesSpecific :
-                        RulesPosition.ContextRulesAny;
-                }
-                else {
-                    position = specificTokens ?
-                        RulesPosition.NoContextRulesSpecific :
-                        RulesPosition.NoContextRulesAny;
-                }
-                var state = constructionState[rulesBucketIndex];
-                if (state === undefined) {
-                    state = constructionState[rulesBucketIndex] = new RulesBucketConstructionState();
+            function processRange(range, rangeStart, parent, contextNode, dynamicIndentation) {
+                var rangeHasError = rangeContainsError(range);
+                var lineAdded;
+                if (!rangeHasError && !previousRangeHasError) {
+                    if (!previousRange) {
+                        // trim whitespaces starting from the beginning of the span up to the current line
+                        var originalStart = sourceFile.getLineAndCharacterOfPosition(originalRange.pos);
+                        trimTrailingWhitespacesForLines(originalStart.line, rangeStart.line);
+                    }
+                    else {
+                        lineAdded =
+                            processPair(range, rangeStart.line, parent, previousRange, previousRangeStartLine, previousParent, contextNode, dynamicIndentation);
+                    }
                 }
-                var index = state.GetInsertionIndex(position);
-                this.rules.splice(index, 0, rule);
-                state.IncreaseInsertionIndex(position);
-            };
-            return RulesBucket;
-        }());
-        formatting.RulesBucket = RulesBucket;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-///<reference path='references.ts' />
-/* @internal */
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var Shared;
-        (function (Shared) {
-            var TokenRangeAccess = (function () {
-                function TokenRangeAccess(from, to, except) {
-                    this.tokens = [];
-                    for (var token = from; token <= to; token++) {
-                        if (ts.indexOf(except, token) < 0) {
-                            this.tokens.push(token);
+                previousRange = range;
+                previousParent = parent;
+                previousRangeStartLine = rangeStart.line;
+                previousRangeHasError = rangeHasError;
+                return lineAdded;
+            }
+            function processPair(currentItem, currentStartLine, currentParent, previousItem, previousStartLine, previousParent, contextNode, dynamicIndentation) {
+                formattingContext.updateContext(previousItem, previousParent, currentItem, currentParent, contextNode);
+                var rule = rulesProvider.getRulesMap().GetRule(formattingContext);
+                var trimTrailingWhitespaces;
+                var lineAdded;
+                if (rule) {
+                    applyRuleEdits(rule, previousItem, previousStartLine, currentItem, currentStartLine);
+                    if (rule.Operation.Action & (2 /* Space */ | 8 /* Delete */) && currentStartLine !== previousStartLine) {
+                        lineAdded = false;
+                        // Handle the case where the next line is moved to be the end of this line.
+                        // In this case we don't indent the next line in the next pass.
+                        if (currentParent.getStart(sourceFile) === currentItem.pos) {
+                            dynamicIndentation.recomputeIndentation(/*lineAddedByFormatting*/ false);
                         }
                     }
+                    else if (rule.Operation.Action & 4 /* NewLine */ && currentStartLine === previousStartLine) {
+                        lineAdded = true;
+                        // Handle the case where token2 is moved to the new line.
+                        // In this case we indent token2 in the next pass but we set
+                        // sameLineIndent flag to notify the indenter that the indentation is within the line.
+                        if (currentParent.getStart(sourceFile) === currentItem.pos) {
+                            dynamicIndentation.recomputeIndentation(/*lineAddedByFormatting*/ true);
+                        }
+                    }
+                    // We need to trim trailing whitespace between the tokens if they were on different lines, and no rule was applied to put them on the same line
+                    trimTrailingWhitespaces = !(rule.Operation.Action & 8 /* Delete */) && rule.Flag !== 1 /* CanDeleteNewLines */;
                 }
-                TokenRangeAccess.prototype.GetTokens = function () {
-                    return this.tokens;
-                };
-                TokenRangeAccess.prototype.Contains = function (token) {
-                    return this.tokens.indexOf(token) >= 0;
-                };
-                return TokenRangeAccess;
-            }());
-            Shared.TokenRangeAccess = TokenRangeAccess;
-            var TokenValuesAccess = (function () {
-                function TokenValuesAccess(tks) {
-                    this.tokens = tks && tks.length ? tks : [];
+                else {
+                    trimTrailingWhitespaces = true;
                 }
-                TokenValuesAccess.prototype.GetTokens = function () {
-                    return this.tokens;
-                };
-                TokenValuesAccess.prototype.Contains = function (token) {
-                    return this.tokens.indexOf(token) >= 0;
-                };
-                return TokenValuesAccess;
-            }());
-            Shared.TokenValuesAccess = TokenValuesAccess;
-            var TokenSingleValueAccess = (function () {
-                function TokenSingleValueAccess(token) {
-                    this.token = token;
+                if (currentStartLine !== previousStartLine && trimTrailingWhitespaces) {
+                    // We need to trim trailing whitespace between the tokens if they were on different lines, and no rule was applied to put them on the same line
+                    trimTrailingWhitespacesForLines(previousStartLine, currentStartLine, previousItem);
                 }
-                TokenSingleValueAccess.prototype.GetTokens = function () {
-                    return [this.token];
-                };
-                TokenSingleValueAccess.prototype.Contains = function (tokenValue) {
-                    return tokenValue === this.token;
-                };
-                return TokenSingleValueAccess;
-            }());
-            Shared.TokenSingleValueAccess = TokenSingleValueAccess;
-            var TokenAllAccess = (function () {
-                function TokenAllAccess() {
+                return lineAdded;
+            }
+            function insertIndentation(pos, indentation, lineAdded) {
+                var indentationString = getIndentationString(indentation, options);
+                if (lineAdded) {
+                    // new line is added before the token by the formatting rules
+                    // insert indentation string at the very beginning of the token
+                    recordReplace(pos, 0, indentationString);
                 }
-                TokenAllAccess.prototype.GetTokens = function () {
-                    var result = [];
-                    for (var token = 0 /* FirstToken */; token <= 138 /* LastToken */; token++) {
-                        result.push(token);
+                else {
+                    var tokenStart = sourceFile.getLineAndCharacterOfPosition(pos);
+                    var startLinePosition = ts.getStartPositionOfLine(tokenStart.line, sourceFile);
+                    if (indentation !== characterToColumn(startLinePosition, tokenStart.character) || indentationIsDifferent(indentationString, startLinePosition)) {
+                        recordReplace(startLinePosition, tokenStart.character, indentationString);
                     }
-                    return result;
-                };
-                TokenAllAccess.prototype.Contains = function (tokenValue) {
-                    return true;
-                };
-                TokenAllAccess.prototype.toString = function () {
-                    return "[allTokens]";
-                };
-                return TokenAllAccess;
-            }());
-            Shared.TokenAllAccess = TokenAllAccess;
-            var TokenRange = (function () {
-                function TokenRange(tokenAccess) {
-                    this.tokenAccess = tokenAccess;
                 }
-                TokenRange.FromToken = function (token) {
-                    return new TokenRange(new TokenSingleValueAccess(token));
-                };
-                TokenRange.FromTokens = function (tokens) {
-                    return new TokenRange(new TokenValuesAccess(tokens));
-                };
-                TokenRange.FromRange = function (f, to, except) {
-                    if (except === void 0) { except = []; }
-                    return new TokenRange(new TokenRangeAccess(f, to, except));
-                };
-                TokenRange.AllTokens = function () {
-                    return new TokenRange(new TokenAllAccess());
-                };
-                TokenRange.prototype.GetTokens = function () {
-                    return this.tokenAccess.GetTokens();
-                };
-                TokenRange.prototype.Contains = function (token) {
-                    return this.tokenAccess.Contains(token);
-                };
-                TokenRange.prototype.toString = function () {
-                    return this.tokenAccess.toString();
-                };
-                return TokenRange;
-            }());
-            TokenRange.Any = TokenRange.AllTokens();
-            TokenRange.AnyIncludingMultilineComments = TokenRange.FromTokens(TokenRange.Any.GetTokens().concat([3 /* MultiLineCommentTrivia */]));
-            TokenRange.Keywords = TokenRange.FromRange(70 /* FirstKeyword */, 138 /* LastKeyword */);
-            TokenRange.BinaryOperators = TokenRange.FromRange(25 /* FirstBinaryOperator */, 68 /* LastBinaryOperator */);
-            TokenRange.BinaryKeywordOperators = TokenRange.FromTokens([90 /* InKeyword */, 91 /* InstanceOfKeyword */, 138 /* OfKeyword */, 116 /* AsKeyword */, 124 /* IsKeyword */]);
-            TokenRange.UnaryPrefixOperators = TokenRange.FromTokens([41 /* PlusPlusToken */, 42 /* MinusMinusToken */, 50 /* TildeToken */, 49 /* ExclamationToken */]);
-            TokenRange.UnaryPrefixExpressions = TokenRange.FromTokens([8 /* NumericLiteral */, 69 /* Identifier */, 17 /* OpenParenToken */, 19 /* OpenBracketToken */, 15 /* OpenBraceToken */, 97 /* ThisKeyword */, 92 /* NewKeyword */]);
-            TokenRange.UnaryPreincrementExpressions = TokenRange.FromTokens([69 /* Identifier */, 17 /* OpenParenToken */, 97 /* ThisKeyword */, 92 /* NewKeyword */]);
-            TokenRange.UnaryPostincrementExpressions = TokenRange.FromTokens([69 /* Identifier */, 18 /* CloseParenToken */, 20 /* CloseBracketToken */, 92 /* NewKeyword */]);
-            TokenRange.UnaryPredecrementExpressions = TokenRange.FromTokens([69 /* Identifier */, 17 /* OpenParenToken */, 97 /* ThisKeyword */, 92 /* NewKeyword */]);
-            TokenRange.UnaryPostdecrementExpressions = TokenRange.FromTokens([69 /* Identifier */, 18 /* CloseParenToken */, 20 /* CloseBracketToken */, 92 /* NewKeyword */]);
-            TokenRange.Comments = TokenRange.FromTokens([2 /* SingleLineCommentTrivia */, 3 /* MultiLineCommentTrivia */]);
-            TokenRange.TypeNames = TokenRange.FromTokens([69 /* Identifier */, 130 /* NumberKeyword */, 132 /* StringKeyword */, 120 /* BooleanKeyword */, 133 /* SymbolKeyword */, 103 /* VoidKeyword */, 117 /* AnyKeyword */]);
-            Shared.TokenRange = TokenRange;
-        })(Shared = formatting.Shared || (formatting.Shared = {}));
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-///<reference path='..\services.ts' />
-///<reference path='formattingContext.ts' />
-///<reference path='formattingRequestKind.ts' />
-///<reference path='rule.ts' />
-///<reference path='ruleAction.ts' />
-///<reference path='ruleDescriptor.ts' />
-///<reference path='ruleFlag.ts' />
-///<reference path='ruleOperation.ts' />
-///<reference path='ruleOperationContext.ts' />
-///<reference path='rules.ts' />
-///<reference path='rulesMap.ts' />
-///<reference path='tokenRange.ts' /> 
-/// <reference path="references.ts"/>
-/* @internal */
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var RulesProvider = (function () {
-            function RulesProvider() {
-                this.globalRules = new formatting.Rules();
             }
-            RulesProvider.prototype.getRuleName = function (rule) {
-                return this.globalRules.getRuleName(rule);
-            };
-            RulesProvider.prototype.getRuleByName = function (name) {
-                return this.globalRules[name];
-            };
-            RulesProvider.prototype.getRulesMap = function () {
-                return this.rulesMap;
-            };
-            RulesProvider.prototype.ensureUpToDate = function (options) {
-                if (!this.options || !ts.compareDataObjects(this.options, options)) {
-                    var activeRules = this.createActiveRules(options);
-                    var rulesMap = formatting.RulesMap.create(activeRules);
-                    this.activeRules = activeRules;
-                    this.rulesMap = rulesMap;
-                    this.options = ts.clone(options);
-                }
-            };
-            RulesProvider.prototype.createActiveRules = function (options) {
-                var rules = this.globalRules.HighPriorityCommonRules.slice(0);
-                if (options.insertSpaceAfterCommaDelimiter) {
-                    rules.push(this.globalRules.SpaceAfterComma);
-                }
-                else {
-                    rules.push(this.globalRules.NoSpaceAfterComma);
+            function characterToColumn(startLinePosition, characterInLine) {
+                var column = 0;
+                for (var i = 0; i < characterInLine; i++) {
+                    if (sourceFile.text.charCodeAt(startLinePosition + i) === 9 /* tab */) {
+                        column += options.tabSize - column % options.tabSize;
+                    }
+                    else {
+                        column++;
+                    }
                 }
-                if (options.insertSpaceAfterFunctionKeywordForAnonymousFunctions) {
-                    rules.push(this.globalRules.SpaceAfterAnonymousFunctionKeyword);
+                return column;
+            }
+            function indentationIsDifferent(indentationString, startLinePosition) {
+                return indentationString !== sourceFile.text.substr(startLinePosition, indentationString.length);
+            }
+            function indentMultilineComment(commentRange, indentation, firstLineIsIndented) {
+                // split comment in lines
+                var startLine = sourceFile.getLineAndCharacterOfPosition(commentRange.pos).line;
+                var endLine = sourceFile.getLineAndCharacterOfPosition(commentRange.end).line;
+                var parts;
+                if (startLine === endLine) {
+                    if (!firstLineIsIndented) {
+                        // treat as single line comment
+                        insertIndentation(commentRange.pos, indentation, /*lineAdded*/ false);
+                    }
+                    return;
                 }
                 else {
-                    rules.push(this.globalRules.NoSpaceAfterAnonymousFunctionKeyword);
+                    parts = [];
+                    var startPos = commentRange.pos;
+                    for (var line = startLine; line < endLine; line++) {
+                        var endOfLine = ts.getEndLinePosition(line, sourceFile);
+                        parts.push({ pos: startPos, end: endOfLine });
+                        startPos = ts.getStartPositionOfLine(line + 1, sourceFile);
+                    }
+                    parts.push({ pos: startPos, end: commentRange.end });
                 }
-                if (options.insertSpaceAfterKeywordsInControlFlowStatements) {
-                    rules.push(this.globalRules.SpaceAfterKeywordInControl);
+                var startLinePos = ts.getStartPositionOfLine(startLine, sourceFile);
+                var nonWhitespaceColumnInFirstPart = formatting.SmartIndenter.findFirstNonWhitespaceCharacterAndColumn(startLinePos, parts[0].pos, sourceFile, options);
+                if (indentation === nonWhitespaceColumnInFirstPart.column) {
+                    return;
                 }
-                else {
-                    rules.push(this.globalRules.NoSpaceAfterKeywordInControl);
+                var startIndex = 0;
+                if (firstLineIsIndented) {
+                    startIndex = 1;
+                    startLine++;
                 }
-                if (options.insertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis) {
-                    rules.push(this.globalRules.SpaceAfterOpenParen);
-                    rules.push(this.globalRules.SpaceBeforeCloseParen);
-                    rules.push(this.globalRules.NoSpaceBetweenParens);
+                // shift all parts on the delta size
+                var delta = indentation - nonWhitespaceColumnInFirstPart.column;
+                for (var i = startIndex; i < parts.length; i++, startLine++) {
+                    var startLinePos_1 = ts.getStartPositionOfLine(startLine, sourceFile);
+                    var nonWhitespaceCharacterAndColumn = i === 0
+                        ? nonWhitespaceColumnInFirstPart
+                        : formatting.SmartIndenter.findFirstNonWhitespaceCharacterAndColumn(parts[i].pos, parts[i].end, sourceFile, options);
+                    var newIndentation = nonWhitespaceCharacterAndColumn.column + delta;
+                    if (newIndentation > 0) {
+                        var indentationString = getIndentationString(newIndentation, options);
+                        recordReplace(startLinePos_1, nonWhitespaceCharacterAndColumn.character, indentationString);
+                    }
+                    else {
+                        recordDelete(startLinePos_1, nonWhitespaceCharacterAndColumn.character);
+                    }
                 }
-                else {
-                    rules.push(this.globalRules.NoSpaceAfterOpenParen);
-                    rules.push(this.globalRules.NoSpaceBeforeCloseParen);
-                    rules.push(this.globalRules.NoSpaceBetweenParens);
+            }
+            function trimTrailingWhitespacesForLines(line1, line2, range) {
+                for (var line = line1; line < line2; line++) {
+                    var lineStartPosition = ts.getStartPositionOfLine(line, sourceFile);
+                    var lineEndPosition = ts.getEndLinePosition(line, sourceFile);
+                    // do not trim whitespaces in comments or template expression
+                    if (range && (ts.isComment(range.kind) || ts.isStringOrRegularExpressionOrTemplateLiteral(range.kind)) && range.pos <= lineEndPosition && range.end > lineEndPosition) {
+                        continue;
+                    }
+                    var whitespaceStart = getTrailingWhitespaceStartPosition(lineStartPosition, lineEndPosition);
+                    if (whitespaceStart !== -1) {
+                        ts.Debug.assert(whitespaceStart === lineStartPosition || !ts.isWhiteSpaceSingleLine(sourceFile.text.charCodeAt(whitespaceStart - 1)));
+                        recordDelete(whitespaceStart, lineEndPosition + 1 - whitespaceStart);
+                    }
                 }
-                if (options.insertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets) {
-                    rules.push(this.globalRules.SpaceAfterOpenBracket);
-                    rules.push(this.globalRules.SpaceBeforeCloseBracket);
-                    rules.push(this.globalRules.NoSpaceBetweenBrackets);
+            }
+            /**
+             * @param start The position of the first character in range
+             * @param end The position of the last character in range
+             */
+            function getTrailingWhitespaceStartPosition(start, end) {
+                var pos = end;
+                while (pos >= start && ts.isWhiteSpaceSingleLine(sourceFile.text.charCodeAt(pos))) {
+                    pos--;
                 }
-                else {
-                    rules.push(this.globalRules.NoSpaceAfterOpenBracket);
-                    rules.push(this.globalRules.NoSpaceBeforeCloseBracket);
-                    rules.push(this.globalRules.NoSpaceBetweenBrackets);
+                if (pos !== end) {
+                    return pos + 1;
                 }
-                // The default value of InsertSpaceAfterOpeningAndBeforeClosingNonemptyBraces is true
-                // so if the option is undefined, we should treat it as true as well
-                if (options.insertSpaceAfterOpeningAndBeforeClosingNonemptyBraces !== false) {
-                    rules.push(this.globalRules.SpaceAfterOpenBrace);
-                    rules.push(this.globalRules.SpaceBeforeCloseBrace);
-                    rules.push(this.globalRules.NoSpaceBetweenEmptyBraceBrackets);
+                return -1;
+            }
+            /**
+             * Trimming will be done for lines after the previous range
+             */
+            function trimTrailingWhitespacesForRemainingRange() {
+                var startPosition = previousRange ? previousRange.end : originalRange.pos;
+                var startLine = sourceFile.getLineAndCharacterOfPosition(startPosition).line;
+                var endLine = sourceFile.getLineAndCharacterOfPosition(originalRange.end).line;
+                trimTrailingWhitespacesForLines(startLine, endLine + 1, previousRange);
+            }
+            function newTextChange(start, len, newText) {
+                return { span: ts.createTextSpan(start, len), newText: newText };
+            }
+            function recordDelete(start, len) {
+                if (len) {
+                    edits.push(newTextChange(start, len, ""));
                 }
-                else {
-                    rules.push(this.globalRules.NoSpaceAfterOpenBrace);
-                    rules.push(this.globalRules.NoSpaceBeforeCloseBrace);
-                    rules.push(this.globalRules.NoSpaceBetweenEmptyBraceBrackets);
+            }
+            function recordReplace(start, len, newText) {
+                if (len || newText) {
+                    edits.push(newTextChange(start, len, newText));
                 }
-                if (options.insertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces) {
-                    rules.push(this.globalRules.SpaceAfterTemplateHeadAndMiddle);
-                    rules.push(this.globalRules.SpaceBeforeTemplateMiddleAndTail);
+            }
+            function applyRuleEdits(rule, previousRange, previousStartLine, currentRange, currentStartLine) {
+                switch (rule.Operation.Action) {
+                    case 1 /* Ignore */:
+                        // no action required
+                        return;
+                    case 8 /* Delete */:
+                        if (previousRange.end !== currentRange.pos) {
+                            // delete characters starting from t1.end up to t2.pos exclusive
+                            recordDelete(previousRange.end, currentRange.pos - previousRange.end);
+                        }
+                        break;
+                    case 4 /* NewLine */:
+                        // exit early if we on different lines and rule cannot change number of newlines
+                        // if line1 and line2 are on subsequent lines then no edits are required - ok to exit
+                        // if line1 and line2 are separated with more than one newline - ok to exit since we cannot delete extra new lines
+                        if (rule.Flag !== 1 /* CanDeleteNewLines */ && previousStartLine !== currentStartLine) {
+                            return;
+                        }
+                        // edit should not be applied only if we have one line feed between elements
+                        var lineDelta = currentStartLine - previousStartLine;
+                        if (lineDelta !== 1) {
+                            recordReplace(previousRange.end, currentRange.pos - previousRange.end, options.newLineCharacter);
+                        }
+                        break;
+                    case 2 /* Space */:
+                        // exit early if we on different lines and rule cannot change number of newlines
+                        if (rule.Flag !== 1 /* CanDeleteNewLines */ && previousStartLine !== currentStartLine) {
+                            return;
+                        }
+                        var posDelta = currentRange.pos - previousRange.end;
+                        if (posDelta !== 1 || sourceFile.text.charCodeAt(previousRange.end) !== 32 /* space */) {
+                            recordReplace(previousRange.end, currentRange.pos - previousRange.end, " ");
+                        }
+                        break;
                 }
-                else {
-                    rules.push(this.globalRules.NoSpaceAfterTemplateHeadAndMiddle);
-                    rules.push(this.globalRules.NoSpaceBeforeTemplateMiddleAndTail);
+            }
+        }
+        function getOpenTokenForList(node, list) {
+            switch (node.kind) {
+                case 152 /* Constructor */:
+                case 228 /* FunctionDeclaration */:
+                case 186 /* FunctionExpression */:
+                case 151 /* MethodDeclaration */:
+                case 150 /* MethodSignature */:
+                case 187 /* ArrowFunction */:
+                    if (node.typeParameters === list) {
+                        return 27 /* LessThanToken */;
+                    }
+                    else if (node.parameters === list) {
+                        return 19 /* OpenParenToken */;
+                    }
+                    break;
+                case 181 /* CallExpression */:
+                case 182 /* NewExpression */:
+                    if (node.typeArguments === list) {
+                        return 27 /* LessThanToken */;
+                    }
+                    else if (node.arguments === list) {
+                        return 19 /* OpenParenToken */;
+                    }
+                    break;
+                case 159 /* TypeReference */:
+                    if (node.typeArguments === list) {
+                        return 27 /* LessThanToken */;
+                    }
+            }
+            return 0 /* Unknown */;
+        }
+        function getCloseTokenForOpenToken(kind) {
+            switch (kind) {
+                case 19 /* OpenParenToken */:
+                    return 20 /* CloseParenToken */;
+                case 27 /* LessThanToken */:
+                    return 29 /* GreaterThanToken */;
+            }
+            return 0 /* Unknown */;
+        }
+        var internedSizes;
+        var internedTabsIndentation;
+        var internedSpacesIndentation;
+        function getIndentationString(indentation, options) {
+            // reset interned strings if FormatCodeOptions were changed
+            var resetInternedStrings = !internedSizes || (internedSizes.tabSize !== options.tabSize || internedSizes.indentSize !== options.indentSize);
+            if (resetInternedStrings) {
+                internedSizes = { tabSize: options.tabSize, indentSize: options.indentSize };
+                internedTabsIndentation = internedSpacesIndentation = undefined;
+            }
+            if (!options.convertTabsToSpaces) {
+                var tabs = Math.floor(indentation / options.tabSize);
+                var spaces = indentation - tabs * options.tabSize;
+                var tabString = void 0;
+                if (!internedTabsIndentation) {
+                    internedTabsIndentation = [];
                 }
-                if (options.insertSpaceAfterOpeningAndBeforeClosingJsxExpressionBraces) {
-                    rules.push(this.globalRules.SpaceAfterOpenBraceInJsxExpression);
-                    rules.push(this.globalRules.SpaceBeforeCloseBraceInJsxExpression);
+                if (internedTabsIndentation[tabs] === undefined) {
+                    internedTabsIndentation[tabs] = tabString = repeat("\t", tabs);
                 }
                 else {
-                    rules.push(this.globalRules.NoSpaceAfterOpenBraceInJsxExpression);
-                    rules.push(this.globalRules.NoSpaceBeforeCloseBraceInJsxExpression);
-                }
-                if (options.insertSpaceAfterSemicolonInForStatements) {
-                    rules.push(this.globalRules.SpaceAfterSemicolonInFor);
+                    tabString = internedTabsIndentation[tabs];
                 }
-                else {
-                    rules.push(this.globalRules.NoSpaceAfterSemicolonInFor);
+                return spaces ? tabString + repeat(" ", spaces) : tabString;
+            }
+            else {
+                var spacesString = void 0;
+                var quotient = Math.floor(indentation / options.indentSize);
+                var remainder = indentation % options.indentSize;
+                if (!internedSpacesIndentation) {
+                    internedSpacesIndentation = [];
                 }
-                if (options.insertSpaceBeforeAndAfterBinaryOperators) {
-                    rules.push(this.globalRules.SpaceBeforeBinaryOperator);
-                    rules.push(this.globalRules.SpaceAfterBinaryOperator);
+                if (internedSpacesIndentation[quotient] === undefined) {
+                    spacesString = repeat(" ", options.indentSize * quotient);
+                    internedSpacesIndentation[quotient] = spacesString;
                 }
                 else {
-                    rules.push(this.globalRules.NoSpaceBeforeBinaryOperator);
-                    rules.push(this.globalRules.NoSpaceAfterBinaryOperator);
-                }
-                if (options.placeOpenBraceOnNewLineForControlBlocks) {
-                    rules.push(this.globalRules.NewLineBeforeOpenBraceInControl);
-                }
-                if (options.placeOpenBraceOnNewLineForFunctions) {
-                    rules.push(this.globalRules.NewLineBeforeOpenBraceInFunction);
-                    rules.push(this.globalRules.NewLineBeforeOpenBraceInTypeScriptDeclWithBlock);
-                }
-                if (options.insertSpaceAfterTypeAssertion) {
-                    rules.push(this.globalRules.SpaceAfterTypeAssertion);
+                    spacesString = internedSpacesIndentation[quotient];
                 }
-                else {
-                    rules.push(this.globalRules.NoSpaceAfterTypeAssertion);
+                return remainder ? spacesString + repeat(" ", remainder) : spacesString;
+            }
+            function repeat(value, count) {
+                var s = "";
+                for (var i = 0; i < count; i++) {
+                    s += value;
                 }
-                rules = rules.concat(this.globalRules.LowPriorityCommonRules);
-                return rules;
-            };
-            return RulesProvider;
-        }());
-        formatting.RulesProvider = RulesProvider;
+                return s;
+            }
+        }
+        formatting.getIndentationString = getIndentationString;
     })(formatting = ts.formatting || (ts.formatting = {}));
 })(ts || (ts = {}));
 ///<reference path='..\services.ts' />
-///<reference path='formattingScanner.ts' />
-///<reference path='rulesProvider.ts' />
-///<reference path='references.ts' />
 /* @internal */
 var ts;
 (function (ts) {
     var formatting;
     (function (formatting) {
-        var Constants;
-        (function (Constants) {
-            Constants[Constants["Unknown"] = -1] = "Unknown";
-        })(Constants || (Constants = {}));
-        function formatOnEnter(position, sourceFile, rulesProvider, options) {
-            var line = sourceFile.getLineAndCharacterOfPosition(position).line;
-            if (line === 0) {
-                return [];
-            }
-            // After the enter key, the cursor is now at a new line. The new line may or may not contain non-whitespace characters.
-            // If the new line has only whitespaces, we won't want to format this line, because that would remove the indentation as
-            // trailing whitespaces. So the end of the formatting span should be the later one between:
-            //  1. the end of the previous line
-            //  2. the last non-whitespace character in the current line
-            var endOfFormatSpan = ts.getEndLinePosition(line, sourceFile);
-            while (ts.isWhiteSpaceSingleLine(sourceFile.text.charCodeAt(endOfFormatSpan))) {
-                endOfFormatSpan--;
-            }
-            // if the character at the end of the span is a line break, we shouldn't include it, because it indicates we don't want to
-            // touch the current line at all. Also, on some OSes the line break consists of two characters (\r\n), we should test if the
-            // previous character before the end of format span is line break character as well.
-            if (ts.isLineBreak(sourceFile.text.charCodeAt(endOfFormatSpan))) {
-                endOfFormatSpan--;
-            }
-            var span = {
-                // get start position for the previous line
-                pos: ts.getStartPositionOfLine(line - 1, sourceFile),
-                // end value is exclusive so add 1 to the result
-                end: endOfFormatSpan + 1
-            };
-            return formatSpan(span, sourceFile, options, rulesProvider, 2 /* FormatOnEnter */);
-        }
-        formatting.formatOnEnter = formatOnEnter;
-        function formatOnSemicolon(position, sourceFile, rulesProvider, options) {
-            return formatOutermostParent(position, 23 /* SemicolonToken */, sourceFile, options, rulesProvider, 3 /* FormatOnSemicolon */);
-        }
-        formatting.formatOnSemicolon = formatOnSemicolon;
-        function formatOnClosingCurly(position, sourceFile, rulesProvider, options) {
-            return formatOutermostParent(position, 16 /* CloseBraceToken */, sourceFile, options, rulesProvider, 4 /* FormatOnClosingCurlyBrace */);
-        }
-        formatting.formatOnClosingCurly = formatOnClosingCurly;
-        function formatDocument(sourceFile, rulesProvider, options) {
-            var span = {
-                pos: 0,
-                end: sourceFile.text.length
-            };
-            return formatSpan(span, sourceFile, options, rulesProvider, 0 /* FormatDocument */);
-        }
-        formatting.formatDocument = formatDocument;
-        function formatSelection(start, end, sourceFile, rulesProvider, options) {
-            // format from the beginning of the line
-            var span = {
-                pos: ts.getLineStartPositionForPosition(start, sourceFile),
-                end: end
-            };
-            return formatSpan(span, sourceFile, options, rulesProvider, 1 /* FormatSelection */);
-        }
-        formatting.formatSelection = formatSelection;
-        function formatOutermostParent(position, expectedLastToken, sourceFile, options, rulesProvider, requestKind) {
-            var parent = findOutermostParent(position, expectedLastToken, sourceFile);
-            if (!parent) {
-                return [];
-            }
-            var span = {
-                pos: ts.getLineStartPositionForPosition(parent.getStart(sourceFile), sourceFile),
-                end: parent.end
-            };
-            return formatSpan(span, sourceFile, options, rulesProvider, requestKind);
-        }
-        function findOutermostParent(position, expectedTokenKind, sourceFile) {
-            var precedingToken = ts.findPrecedingToken(position, sourceFile);
-            // when it is claimed that trigger character was typed at given position
-            // we verify that there is a token with a matching kind whose end is equal to position (because the character was just typed).
-            // If this condition is not hold - then trigger character was typed in some other context,
-            // i.e.in comment and thus should not trigger autoformatting
-            if (!precedingToken ||
-                precedingToken.kind !== expectedTokenKind ||
-                position !== precedingToken.getEnd()) {
-                return undefined;
-            }
-            // walk up and search for the parent node that ends at the same position with precedingToken.
-            // for cases like this
-            //
-            // let x = 1;
-            // while (true) {
-            // }
-            // after typing close curly in while statement we want to reformat just the while statement.
-            // However if we just walk upwards searching for the parent that has the same end value -
-            // we'll end up with the whole source file. isListElement allows to stop on the list element level
-            var current = precedingToken;
-            while (current &&
-                current.parent &&
-                current.parent.end === precedingToken.end &&
-                !isListElement(current.parent, current)) {
-                current = current.parent;
-            }
-            return current;
-        }
-        // Returns true if node is a element in some list in parent
-        // i.e. parent is class declaration with the list of members and node is one of members.
-        function isListElement(parent, node) {
-            switch (parent.kind) {
-                case 221 /* ClassDeclaration */:
-                case 222 /* InterfaceDeclaration */:
-                    return ts.rangeContainsRange(parent.members, node);
-                case 225 /* ModuleDeclaration */:
-                    var body = parent.body;
-                    return body && body.kind === 199 /* Block */ && ts.rangeContainsRange(body.statements, node);
-                case 256 /* SourceFile */:
-                case 199 /* Block */:
-                case 226 /* ModuleBlock */:
-                    return ts.rangeContainsRange(parent.statements, node);
-                case 252 /* CatchClause */:
-                    return ts.rangeContainsRange(parent.block.statements, node);
-            }
-            return false;
-        }
-        /** find node that fully contains given text range */
-        function findEnclosingNode(range, sourceFile) {
-            return find(sourceFile);
-            function find(n) {
-                var candidate = ts.forEachChild(n, function (c) { return ts.startEndContainsRange(c.getStart(sourceFile), c.end, range) && c; });
-                if (candidate) {
-                    var result = find(candidate);
-                    if (result) {
-                        return result;
+        var SmartIndenter;
+        (function (SmartIndenter) {
+            var Value;
+            (function (Value) {
+                Value[Value["Unknown"] = -1] = "Unknown";
+            })(Value || (Value = {}));
+            /**
+             * Computed indentation for a given position in source file
+             * @param position - position in file
+             * @param sourceFile - target source file
+             * @param options - set of editor options that control indentation
+             * @param assumeNewLineBeforeCloseBrace - false when getIndentation is called on the text from the real source file.
+             * true - when we need to assume that position is on the newline. This is usefult for codefixes, i.e.
+             * function f() {
+             * |}
+             * when inserting some text after open brace we would like to get the value of indentation as if newline was already there.
+             * However by default indentation at position | will be 0 so 'assumeNewLineBeforeCloseBrace' allows to override this behavior,
+             */
+            function getIndentation(position, sourceFile, options, assumeNewLineBeforeCloseBrace) {
+                if (assumeNewLineBeforeCloseBrace === void 0) { assumeNewLineBeforeCloseBrace = false; }
+                if (position > sourceFile.text.length) {
+                    return getBaseIndentation(options); // past EOF
+                }
+                // no indentation when the indent style is set to none,
+                // so we can return fast
+                if (options.indentStyle === ts.IndentStyle.None) {
+                    return 0;
+                }
+                var precedingToken = ts.findPrecedingToken(position, sourceFile);
+                if (!precedingToken) {
+                    return getBaseIndentation(options);
+                }
+                // no indentation in string \regex\template literals
+                var precedingTokenIsLiteral = ts.isStringOrRegularExpressionOrTemplateLiteral(precedingToken.kind);
+                if (precedingTokenIsLiteral && precedingToken.getStart(sourceFile) <= position && precedingToken.end > position) {
+                    return 0;
+                }
+                var lineAtPosition = sourceFile.getLineAndCharacterOfPosition(position).line;
+                // indentation is first non-whitespace character in a previous line
+                // for block indentation, we should look for a line which contains something that's not
+                // whitespace.
+                if (options.indentStyle === ts.IndentStyle.Block) {
+                    // move backwards until we find a line with a non-whitespace character,
+                    // then find the first non-whitespace character for that line.
+                    var current_1 = position;
+                    while (current_1 > 0) {
+                        var char = sourceFile.text.charCodeAt(current_1);
+                        if (!ts.isWhiteSpaceLike(char)) {
+                            break;
+                        }
+                        current_1--;
                     }
+                    var lineStart = ts.getLineStartPositionForPosition(current_1, sourceFile);
+                    return SmartIndenter.findFirstNonWhitespaceColumn(lineStart, current_1, sourceFile, options);
                 }
-                return n;
+                if (precedingToken.kind === 26 /* CommaToken */ && precedingToken.parent.kind !== 194 /* BinaryExpression */) {
+                    // previous token is comma that separates items in list - find the previous item and try to derive indentation from it
+                    var actualIndentation = getActualIndentationForListItemBeforeComma(precedingToken, sourceFile, options);
+                    if (actualIndentation !== -1 /* Unknown */) {
+                        return actualIndentation;
+                    }
+                }
+                // try to find node that can contribute to indentation and includes 'position' starting from 'precedingToken'
+                // if such node is found - compute initial indentation for 'position' inside this node
+                var previous;
+                var current = precedingToken;
+                var currentStart;
+                var indentationDelta;
+                while (current) {
+                    if (ts.positionBelongsToNode(current, position, sourceFile) && shouldIndentChildNode(current, previous)) {
+                        currentStart = getStartLineAndCharacterForNode(current, sourceFile);
+                        var nextTokenKind = nextTokenIsCurlyBraceOnSameLineAsCursor(precedingToken, current, lineAtPosition, sourceFile);
+                        if (nextTokenKind !== 0 /* Unknown */) {
+                            // handle cases when codefix is about to be inserted before the close brace
+                            indentationDelta = assumeNewLineBeforeCloseBrace && nextTokenKind === 2 /* CloseBrace */ ? options.indentSize : 0;
+                        }
+                        else {
+                            indentationDelta = lineAtPosition !== currentStart.line ? options.indentSize : 0;
+                        }
+                        break;
+                    }
+                    // check if current node is a list item - if yes, take indentation from it
+                    var actualIndentation = getActualIndentationForListItem(current, sourceFile, options);
+                    if (actualIndentation !== -1 /* Unknown */) {
+                        return actualIndentation;
+                    }
+                    actualIndentation = getLineIndentationWhenExpressionIsInMultiLine(current, sourceFile, options);
+                    if (actualIndentation !== -1 /* Unknown */) {
+                        return actualIndentation + options.indentSize;
+                    }
+                    previous = current;
+                    current = current.parent;
+                }
+                if (!current) {
+                    // no parent was found - return the base indentation of the SourceFile
+                    return getBaseIndentation(options);
+                }
+                return getIndentationForNodeWorker(current, currentStart, /*ignoreActualIndentationRange*/ undefined, indentationDelta, sourceFile, options);
             }
-        }
-        /** formatting is not applied to ranges that contain parse errors.
-          * This function will return a predicate that for a given text range will tell
-          * if there are any parse errors that overlap with the range.
-          */
-        function prepareRangeContainsErrorFunction(errors, originalRange) {
-            if (!errors.length) {
-                return rangeHasNoErrors;
+            SmartIndenter.getIndentation = getIndentation;
+            function getIndentationForNode(n, ignoreActualIndentationRange, sourceFile, options) {
+                var start = sourceFile.getLineAndCharacterOfPosition(n.getStart(sourceFile));
+                return getIndentationForNodeWorker(n, start, ignoreActualIndentationRange, /*indentationDelta*/ 0, sourceFile, options);
             }
-            // pick only errors that fall in range
-            var sorted = errors
-                .filter(function (d) { return ts.rangeOverlapsWithStartEnd(originalRange, d.start, d.start + d.length); })
-                .sort(function (e1, e2) { return e1.start - e2.start; });
-            if (!sorted.length) {
-                return rangeHasNoErrors;
+            SmartIndenter.getIndentationForNode = getIndentationForNode;
+            function getBaseIndentation(options) {
+                return options.baseIndentSize || 0;
             }
-            var index = 0;
-            return function (r) {
-                // in current implementation sequence of arguments [r1, r2...] is monotonically increasing.
-                // 'index' tracks the index of the most recent error that was checked.
-                while (true) {
-                    if (index >= sorted.length) {
-                        // all errors in the range were already checked -> no error in specified range
-                        return false;
+            SmartIndenter.getBaseIndentation = getBaseIndentation;
+            function getIndentationForNodeWorker(current, currentStart, ignoreActualIndentationRange, indentationDelta, sourceFile, options) {
+                var parent = current.parent;
+                var parentStart;
+                // walk upwards and collect indentations for pairs of parent-child nodes
+                // indentation is not added if parent and child nodes start on the same line or if parent is IfStatement and child starts on the same line with 'else clause'
+                while (parent) {
+                    var useActualIndentation = true;
+                    if (ignoreActualIndentationRange) {
+                        var start = current.getStart(sourceFile);
+                        useActualIndentation = start < ignoreActualIndentationRange.pos || start > ignoreActualIndentationRange.end;
                     }
-                    var error = sorted[index];
-                    if (r.end <= error.start) {
-                        // specified range ends before the error refered by 'index' - no error in range
-                        return false;
+                    if (useActualIndentation) {
+                        // check if current node is a list item - if yes, take indentation from it
+                        var actualIndentation = getActualIndentationForListItem(current, sourceFile, options);
+                        if (actualIndentation !== -1 /* Unknown */) {
+                            return actualIndentation + indentationDelta;
+                        }
                     }
-                    if (ts.startEndOverlapsWithStartEnd(r.pos, r.end, error.start, error.start + error.length)) {
-                        // specified range overlaps with error range
-                        return true;
+                    parentStart = getParentStart(parent, current, sourceFile);
+                    var parentAndChildShareLine = parentStart.line === currentStart.line ||
+                        childStartsOnTheSameLineWithElseInIfStatement(parent, current, currentStart.line, sourceFile);
+                    if (useActualIndentation) {
+                        // try to fetch actual indentation for current node from source text
+                        var actualIndentation = getActualIndentationForNode(current, parent, currentStart, parentAndChildShareLine, sourceFile, options);
+                        if (actualIndentation !== -1 /* Unknown */) {
+                            return actualIndentation + indentationDelta;
+                        }
+                        actualIndentation = getLineIndentationWhenExpressionIsInMultiLine(current, sourceFile, options);
+                        if (actualIndentation !== -1 /* Unknown */) {
+                            return actualIndentation + indentationDelta;
+                        }
                     }
-                    index++;
+                    // increase indentation if parent node wants its content to be indented and parent and child nodes don't start on the same line
+                    if (shouldIndentChildNode(parent, current) && !parentAndChildShareLine) {
+                        indentationDelta += options.indentSize;
+                    }
+                    current = parent;
+                    currentStart = parentStart;
+                    parent = current.parent;
                 }
-            };
-            function rangeHasNoErrors(r) {
-                return false;
+                return indentationDelta + getBaseIndentation(options);
             }
-        }
-        /**
-          * Start of the original range might fall inside the comment - scanner will not yield appropriate results
-          * This function will look for token that is located before the start of target range
-          * and return its end as start position for the scanner.
-          */
-        function getScanStartPosition(enclosingNode, originalRange, sourceFile) {
-            var start = enclosingNode.getStart(sourceFile);
-            if (start === originalRange.pos && enclosingNode.end === originalRange.end) {
-                return start;
+            function getParentStart(parent, child, sourceFile) {
+                var containingList = getContainingList(child, sourceFile);
+                if (containingList) {
+                    return sourceFile.getLineAndCharacterOfPosition(containingList.pos);
+                }
+                return sourceFile.getLineAndCharacterOfPosition(parent.getStart(sourceFile));
             }
-            var precedingToken = ts.findPrecedingToken(originalRange.pos, sourceFile);
-            if (!precedingToken) {
-                // no preceding token found - start from the beginning of enclosing node
-                return enclosingNode.pos;
+            /*
+             * Function returns Value.Unknown if indentation cannot be determined
+             */
+            function getActualIndentationForListItemBeforeComma(commaToken, sourceFile, options) {
+                // previous token is comma that separates items in list - find the previous item and try to derive indentation from it
+                var commaItemInfo = ts.findListItemInfo(commaToken);
+                if (commaItemInfo && commaItemInfo.listItemIndex > 0) {
+                    return deriveActualIndentationFromList(commaItemInfo.list.getChildren(), commaItemInfo.listItemIndex - 1, sourceFile, options);
+                }
+                else {
+                    // handle broken code gracefully
+                    return -1 /* Unknown */;
+                }
             }
-            // preceding token ends after the start of original range (i.e when originalRange.pos falls in the middle of literal)
-            // start from the beginning of enclosingNode to handle the entire 'originalRange'
-            if (precedingToken.end >= originalRange.pos) {
-                return enclosingNode.pos;
+            /*
+             * Function returns Value.Unknown if actual indentation for node should not be used (i.e because node is nested expression)
+             */
+            function getActualIndentationForNode(current, parent, currentLineAndChar, parentAndChildShareLine, sourceFile, options) {
+                // actual indentation is used for statements\declarations if one of cases below is true:
+                // - parent is SourceFile - by default immediate children of SourceFile are not indented except when user indents them manually
+                // - parent and child are not on the same line
+                var useActualIndentation = (ts.isDeclaration(current) || ts.isStatementButNotDeclaration(current)) &&
+                    (parent.kind === 265 /* SourceFile */ || !parentAndChildShareLine);
+                if (!useActualIndentation) {
+                    return -1 /* Unknown */;
+                }
+                return findColumnForFirstNonWhitespaceCharacterInLine(currentLineAndChar, sourceFile, options);
             }
-            return precedingToken.end;
-        }
-        /*
-         * For cases like
-         * if (a ||
-         *     b ||$
-         *     c) {...}
-         * If we hit Enter at $ we want line '    b ||' to be indented.
-         * Formatting will be applied to the last two lines.
-         * Node that fully encloses these lines is binary expression 'a ||...'.
-         * Initial indentation for this node will be 0.
-         * Binary expressions don't introduce new indentation scopes, however it is possible
-         * that some parent node on the same line does - like if statement in this case.
-         * Note that we are considering parents only from the same line with initial node -
-         * if parent is on the different line - its delta was already contributed
-         * to the initial indentation.
-         */
-        function getOwnOrInheritedDelta(n, options, sourceFile) {
-            var previousLine = -1 /* Unknown */;
-            var child;
-            while (n) {
-                var line = sourceFile.getLineAndCharacterOfPosition(n.getStart(sourceFile)).line;
-                if (previousLine !== -1 /* Unknown */ && line !== previousLine) {
-                    break;
+            var NextTokenKind;
+            (function (NextTokenKind) {
+                NextTokenKind[NextTokenKind["Unknown"] = 0] = "Unknown";
+                NextTokenKind[NextTokenKind["OpenBrace"] = 1] = "OpenBrace";
+                NextTokenKind[NextTokenKind["CloseBrace"] = 2] = "CloseBrace";
+            })(NextTokenKind || (NextTokenKind = {}));
+            function nextTokenIsCurlyBraceOnSameLineAsCursor(precedingToken, current, lineAtPosition, sourceFile) {
+                var nextToken = ts.findNextToken(precedingToken, current);
+                if (!nextToken) {
+                    return 0 /* Unknown */;
                 }
-                if (formatting.SmartIndenter.shouldIndentChildNode(n, child)) {
-                    return options.indentSize;
+                if (nextToken.kind === 17 /* OpenBraceToken */) {
+                    // open braces are always indented at the parent level
+                    return 1 /* OpenBrace */;
                 }
-                previousLine = line;
-                child = n;
-                n = n.parent;
+                else if (nextToken.kind === 18 /* CloseBraceToken */) {
+                    // close braces are indented at the parent level if they are located on the same line with cursor
+                    // this means that if new line will be added at $ position, this case will be indented
+                    // class A {
+                    //    $
+                    // }
+                    /// and this one - not
+                    // class A {
+                    // $}
+                    var nextTokenStartLine = getStartLineAndCharacterForNode(nextToken, sourceFile).line;
+                    return lineAtPosition === nextTokenStartLine ? 2 /* CloseBrace */ : 0 /* Unknown */;
+                }
+                return 0 /* Unknown */;
             }
-            return 0;
-        }
-        function formatSpan(originalRange, sourceFile, options, rulesProvider, requestKind) {
-            var rangeContainsError = prepareRangeContainsErrorFunction(sourceFile.parseDiagnostics, originalRange);
-            // formatting context is used by rules provider
-            var formattingContext = new formatting.FormattingContext(sourceFile, requestKind);
-            // find the smallest node that fully wraps the range and compute the initial indentation for the node
-            var enclosingNode = findEnclosingNode(originalRange, sourceFile);
-            var formattingScanner = formatting.getFormattingScanner(sourceFile, getScanStartPosition(enclosingNode, originalRange, sourceFile), originalRange.end);
-            var initialIndentation = formatting.SmartIndenter.getIndentationForNode(enclosingNode, originalRange, sourceFile, options);
-            var previousRangeHasError;
-            var previousRange;
-            var previousParent;
-            var previousRangeStartLine;
-            var lastIndentedLine;
-            var indentationOnLastIndentedLine;
-            var edits = [];
-            formattingScanner.advance();
-            if (formattingScanner.isOnToken()) {
-                var startLine = sourceFile.getLineAndCharacterOfPosition(enclosingNode.getStart(sourceFile)).line;
-                var undecoratedStartLine = startLine;
-                if (enclosingNode.decorators) {
-                    undecoratedStartLine = sourceFile.getLineAndCharacterOfPosition(ts.getNonDecoratorTokenPosOfNode(enclosingNode, sourceFile)).line;
+            function getStartLineAndCharacterForNode(n, sourceFile) {
+                return sourceFile.getLineAndCharacterOfPosition(n.getStart(sourceFile));
+            }
+            function childStartsOnTheSameLineWithElseInIfStatement(parent, child, childStartLine, sourceFile) {
+                if (parent.kind === 211 /* IfStatement */ && parent.elseStatement === child) {
+                    var elseKeyword = ts.findChildOfKind(parent, 82 /* ElseKeyword */, sourceFile);
+                    ts.Debug.assert(elseKeyword !== undefined);
+                    var elseKeywordStartLine = getStartLineAndCharacterForNode(elseKeyword, sourceFile).line;
+                    return elseKeywordStartLine === childStartLine;
+                }
+                return false;
+            }
+            SmartIndenter.childStartsOnTheSameLineWithElseInIfStatement = childStartsOnTheSameLineWithElseInIfStatement;
+            function getListIfStartEndIsInListRange(list, start, end) {
+                return list && ts.rangeContainsStartEnd(list, start, end) ? list : undefined;
+            }
+            function getContainingList(node, sourceFile) {
+                if (node.parent) {
+                    switch (node.parent.kind) {
+                        case 159 /* TypeReference */:
+                            return getListIfStartEndIsInListRange(node.parent.typeArguments, node.getStart(sourceFile), node.getEnd());
+                        case 178 /* ObjectLiteralExpression */:
+                            return node.parent.properties;
+                        case 177 /* ArrayLiteralExpression */:
+                            return node.parent.elements;
+                        case 228 /* FunctionDeclaration */:
+                        case 186 /* FunctionExpression */:
+                        case 187 /* ArrowFunction */:
+                        case 151 /* MethodDeclaration */:
+                        case 150 /* MethodSignature */:
+                        case 155 /* CallSignature */:
+                        case 152 /* Constructor */:
+                        case 161 /* ConstructorType */:
+                        case 156 /* ConstructSignature */: {
+                            var start = node.getStart(sourceFile);
+                            return getListIfStartEndIsInListRange(node.parent.typeParameters, start, node.getEnd()) ||
+                                getListIfStartEndIsInListRange(node.parent.parameters, start, node.getEnd());
+                        }
+                        case 229 /* ClassDeclaration */:
+                            return getListIfStartEndIsInListRange(node.parent.typeParameters, node.getStart(sourceFile), node.getEnd());
+                        case 182 /* NewExpression */:
+                        case 181 /* CallExpression */: {
+                            var start = node.getStart(sourceFile);
+                            return getListIfStartEndIsInListRange(node.parent.typeArguments, start, node.getEnd()) ||
+                                getListIfStartEndIsInListRange(node.parent.arguments, start, node.getEnd());
+                        }
+                        case 227 /* VariableDeclarationList */:
+                            return getListIfStartEndIsInListRange(node.parent.declarations, node.getStart(sourceFile), node.getEnd());
+                        case 241 /* NamedImports */:
+                        case 245 /* NamedExports */:
+                            return getListIfStartEndIsInListRange(node.parent.elements, node.getStart(sourceFile), node.getEnd());
+                    }
                 }
-                var delta = getOwnOrInheritedDelta(enclosingNode, options, sourceFile);
-                processNode(enclosingNode, enclosingNode, startLine, undecoratedStartLine, initialIndentation, delta);
+                return undefined;
             }
-            if (!formattingScanner.isOnToken()) {
-                var leadingTrivia = formattingScanner.getCurrentLeadingTrivia();
-                if (leadingTrivia) {
-                    processTrivia(leadingTrivia, enclosingNode, enclosingNode, undefined);
-                    trimTrailingWhitespacesForRemainingRange();
+            SmartIndenter.getContainingList = getContainingList;
+            function getActualIndentationForListItem(node, sourceFile, options) {
+                var containingList = getContainingList(node, sourceFile);
+                return containingList ? getActualIndentationFromList(containingList) : -1 /* Unknown */;
+                function getActualIndentationFromList(list) {
+                    var index = ts.indexOf(list, node);
+                    return index !== -1 ? deriveActualIndentationFromList(list, index, sourceFile, options) : -1 /* Unknown */;
                 }
             }
-            formattingScanner.close();
-            return edits;
-            // local functions
-            /** Tries to compute the indentation for a list element.
-              * If list element is not in range then
-              * function will pick its actual indentation
-              * so it can be pushed downstream as inherited indentation.
-              * If list element is in the range - its indentation will be equal
-              * to inherited indentation from its predecessors.
-              */
-            function tryComputeIndentationForListItem(startPos, endPos, parentStartLine, range, inheritedIndentation) {
-                if (ts.rangeOverlapsWithStartEnd(range, startPos, endPos) ||
-                    ts.rangeContainsStartEnd(range, startPos, endPos) /* Not to miss zero-range nodes e.g. JsxText */) {
-                    if (inheritedIndentation !== -1 /* Unknown */) {
-                        return inheritedIndentation;
-                    }
+            function getLineIndentationWhenExpressionIsInMultiLine(node, sourceFile, options) {
+                // actual indentation should not be used when:
+                // - node is close parenthesis - this is the end of the expression
+                if (node.kind === 20 /* CloseParenToken */) {
+                    return -1 /* Unknown */;
                 }
-                else {
-                    var startLine = sourceFile.getLineAndCharacterOfPosition(startPos).line;
-                    var startLinePosition = ts.getLineStartPositionForPosition(startPos, sourceFile);
-                    var column = formatting.SmartIndenter.findFirstNonWhitespaceColumn(startLinePosition, startPos, sourceFile, options);
-                    if (startLine !== parentStartLine || startPos === column) {
-                        // Use the base indent size if it is greater than
-                        // the indentation of the inherited predecessor.
-                        var baseIndentSize = formatting.SmartIndenter.getBaseIndentation(options);
-                        return baseIndentSize > column ? baseIndentSize : column;
+                if (node.parent && ts.isCallOrNewExpression(node.parent) && node.parent.expression !== node) {
+                    var fullCallOrNewExpression = node.parent.expression;
+                    var startingExpression = getStartingExpression(fullCallOrNewExpression);
+                    if (fullCallOrNewExpression === startingExpression) {
+                        return -1 /* Unknown */;
+                    }
+                    var fullCallOrNewExpressionEnd = sourceFile.getLineAndCharacterOfPosition(fullCallOrNewExpression.end);
+                    var startingExpressionEnd = sourceFile.getLineAndCharacterOfPosition(startingExpression.end);
+                    if (fullCallOrNewExpressionEnd.line === startingExpressionEnd.line) {
+                        return -1 /* Unknown */;
                     }
+                    return findColumnForFirstNonWhitespaceCharacterInLine(fullCallOrNewExpressionEnd, sourceFile, options);
                 }
                 return -1 /* Unknown */;
+                function getStartingExpression(node) {
+                    while (true) {
+                        switch (node.kind) {
+                            case 181 /* CallExpression */:
+                            case 182 /* NewExpression */:
+                            case 179 /* PropertyAccessExpression */:
+                            case 180 /* ElementAccessExpression */:
+                                node = node.expression;
+                                break;
+                            default:
+                                return node;
+                        }
+                    }
+                }
             }
-            function computeIndentation(node, startLine, inheritedIndentation, parent, parentDynamicIndentation, effectiveParentStartLine) {
-                var indentation = inheritedIndentation;
-                var delta = formatting.SmartIndenter.shouldIndentChildNode(node) ? options.indentSize : 0;
-                if (effectiveParentStartLine === startLine) {
-                    // if node is located on the same line with the parent
-                    // - inherit indentation from the parent
-                    // - push children if either parent of node itself has non-zero delta
-                    indentation = startLine === lastIndentedLine
-                        ? indentationOnLastIndentedLine
-                        : parentDynamicIndentation.getIndentation();
-                    delta = Math.min(options.indentSize, parentDynamicIndentation.getDelta(node) + delta);
+            function deriveActualIndentationFromList(list, index, sourceFile, options) {
+                ts.Debug.assert(index >= 0 && index < list.length);
+                var node = list[index];
+                // walk toward the start of the list starting from current node and check if the line is the same for all items.
+                // if end line for item [i - 1] differs from the start line for item [i] - find column of the first non-whitespace character on the line of item [i]
+                var lineAndCharacter = getStartLineAndCharacterForNode(node, sourceFile);
+                for (var i = index - 1; i >= 0; i--) {
+                    if (list[i].kind === 26 /* CommaToken */) {
+                        continue;
+                    }
+                    // skip list items that ends on the same line with the current list element
+                    var prevEndLine = sourceFile.getLineAndCharacterOfPosition(list[i].end).line;
+                    if (prevEndLine !== lineAndCharacter.line) {
+                        return findColumnForFirstNonWhitespaceCharacterInLine(lineAndCharacter, sourceFile, options);
+                    }
+                    lineAndCharacter = getStartLineAndCharacterForNode(list[i], sourceFile);
                 }
-                else if (indentation === -1 /* Unknown */) {
-                    if (formatting.SmartIndenter.childStartsOnTheSameLineWithElseInIfStatement(parent, node, startLine, sourceFile)) {
-                        indentation = parentDynamicIndentation.getIndentation();
+                return -1 /* Unknown */;
+            }
+            function findColumnForFirstNonWhitespaceCharacterInLine(lineAndCharacter, sourceFile, options) {
+                var lineStart = sourceFile.getPositionOfLineAndCharacter(lineAndCharacter.line, 0);
+                return findFirstNonWhitespaceColumn(lineStart, lineStart + lineAndCharacter.character, sourceFile, options);
+            }
+            /*
+                Character is the actual index of the character since the beginning of the line.
+                Column - position of the character after expanding tabs to spaces
+                "0\t2$"
+                value of 'character' for '$' is 3
+                value of 'column' for '$' is 6 (assuming that tab size is 4)
+            */
+            function findFirstNonWhitespaceCharacterAndColumn(startPos, endPos, sourceFile, options) {
+                var character = 0;
+                var column = 0;
+                for (var pos = startPos; pos < endPos; pos++) {
+                    var ch = sourceFile.text.charCodeAt(pos);
+                    if (!ts.isWhiteSpaceSingleLine(ch)) {
+                        break;
+                    }
+                    if (ch === 9 /* tab */) {
+                        column += options.tabSize + (column % options.tabSize);
                     }
                     else {
-                        indentation = parentDynamicIndentation.getIndentation() + parentDynamicIndentation.getDelta(node);
+                        column++;
                     }
+                    character++;
                 }
-                return {
-                    indentation: indentation,
-                    delta: delta
-                };
+                return { column: column, character: character };
             }
-            function getFirstNonDecoratorTokenOfNode(node) {
-                if (node.modifiers && node.modifiers.length) {
-                    return node.modifiers[0].kind;
+            SmartIndenter.findFirstNonWhitespaceCharacterAndColumn = findFirstNonWhitespaceCharacterAndColumn;
+            function findFirstNonWhitespaceColumn(startPos, endPos, sourceFile, options) {
+                return findFirstNonWhitespaceCharacterAndColumn(startPos, endPos, sourceFile, options).column;
+            }
+            SmartIndenter.findFirstNonWhitespaceColumn = findFirstNonWhitespaceColumn;
+            function nodeContentIsAlwaysIndented(kind) {
+                switch (kind) {
+                    case 210 /* ExpressionStatement */:
+                    case 229 /* ClassDeclaration */:
+                    case 199 /* ClassExpression */:
+                    case 230 /* InterfaceDeclaration */:
+                    case 232 /* EnumDeclaration */:
+                    case 231 /* TypeAliasDeclaration */:
+                    case 177 /* ArrayLiteralExpression */:
+                    case 207 /* Block */:
+                    case 234 /* ModuleBlock */:
+                    case 178 /* ObjectLiteralExpression */:
+                    case 163 /* TypeLiteral */:
+                    case 172 /* MappedType */:
+                    case 165 /* TupleType */:
+                    case 235 /* CaseBlock */:
+                    case 258 /* DefaultClause */:
+                    case 257 /* CaseClause */:
+                    case 185 /* ParenthesizedExpression */:
+                    case 179 /* PropertyAccessExpression */:
+                    case 181 /* CallExpression */:
+                    case 182 /* NewExpression */:
+                    case 208 /* VariableStatement */:
+                    case 226 /* VariableDeclaration */:
+                    case 243 /* ExportAssignment */:
+                    case 219 /* ReturnStatement */:
+                    case 195 /* ConditionalExpression */:
+                    case 175 /* ArrayBindingPattern */:
+                    case 174 /* ObjectBindingPattern */:
+                    case 251 /* JsxOpeningElement */:
+                    case 250 /* JsxSelfClosingElement */:
+                    case 256 /* JsxExpression */:
+                    case 150 /* MethodSignature */:
+                    case 155 /* CallSignature */:
+                    case 156 /* ConstructSignature */:
+                    case 146 /* Parameter */:
+                    case 160 /* FunctionType */:
+                    case 161 /* ConstructorType */:
+                    case 168 /* ParenthesizedType */:
+                    case 183 /* TaggedTemplateExpression */:
+                    case 191 /* AwaitExpression */:
+                    case 245 /* NamedExports */:
+                    case 241 /* NamedImports */:
+                    case 246 /* ExportSpecifier */:
+                    case 242 /* ImportSpecifier */:
+                        return true;
                 }
-                switch (node.kind) {
-                    case 221 /* ClassDeclaration */: return 73 /* ClassKeyword */;
-                    case 222 /* InterfaceDeclaration */: return 107 /* InterfaceKeyword */;
-                    case 220 /* FunctionDeclaration */: return 87 /* FunctionKeyword */;
-                    case 224 /* EnumDeclaration */: return 224 /* EnumDeclaration */;
-                    case 149 /* GetAccessor */: return 123 /* GetKeyword */;
-                    case 150 /* SetAccessor */: return 131 /* SetKeyword */;
-                    case 147 /* MethodDeclaration */:
-                        if (node.asteriskToken) {
-                            return 37 /* AsteriskToken */;
-                        } /*
-                    fall-through
-                    */
-                    case 145 /* PropertyDeclaration */:
-                    case 142 /* Parameter */:
-                        return node.name.kind;
+                return false;
+            }
+            /* @internal */
+            function nodeWillIndentChild(parent, child, indentByDefault) {
+                var childKind = child ? child.kind : 0 /* Unknown */;
+                switch (parent.kind) {
+                    case 212 /* DoStatement */:
+                    case 213 /* WhileStatement */:
+                    case 215 /* ForInStatement */:
+                    case 216 /* ForOfStatement */:
+                    case 214 /* ForStatement */:
+                    case 211 /* IfStatement */:
+                    case 228 /* FunctionDeclaration */:
+                    case 186 /* FunctionExpression */:
+                    case 151 /* MethodDeclaration */:
+                    case 187 /* ArrowFunction */:
+                    case 152 /* Constructor */:
+                    case 153 /* GetAccessor */:
+                    case 154 /* SetAccessor */:
+                        return childKind !== 207 /* Block */;
+                    case 244 /* ExportDeclaration */:
+                        return childKind !== 245 /* NamedExports */;
+                    case 238 /* ImportDeclaration */:
+                        return childKind !== 239 /* ImportClause */ ||
+                            (child.namedBindings && child.namedBindings.kind !== 241 /* NamedImports */);
+                    case 249 /* JsxElement */:
+                        return childKind !== 252 /* JsxClosingElement */;
                 }
+                // No explicit rule for given nodes so the result will follow the default value argument
+                return indentByDefault;
             }
-            function getDynamicIndentation(node, nodeStartLine, indentation, delta) {
-                return {
-                    getIndentationForComment: function (kind, tokenIndentation, container) {
-                        switch (kind) {
-                            // preceding comment to the token that closes the indentation scope inherits the indentation from the scope
-                            // ..  {
-                            //     // comment
-                            // }
-                            case 16 /* CloseBraceToken */:
-                            case 20 /* CloseBracketToken */:
-                            case 18 /* CloseParenToken */:
-                                return indentation + getEffectiveDelta(delta, container);
-                        }
-                        return tokenIndentation !== -1 /* Unknown */ ? tokenIndentation : indentation;
-                    },
-                    getIndentationForToken: function (line, kind, container) {
-                        if (nodeStartLine !== line && node.decorators) {
-                            if (kind === getFirstNonDecoratorTokenOfNode(node)) {
-                                // if this token is the first token following the list of decorators, we do not need to indent
-                                return indentation;
-                            }
-                        }
-                        switch (kind) {
-                            // open and close brace, 'else' and 'while' (in do statement) tokens has indentation of the parent
-                            case 15 /* OpenBraceToken */:
-                            case 16 /* CloseBraceToken */:
-                            case 19 /* OpenBracketToken */:
-                            case 20 /* CloseBracketToken */:
-                            case 17 /* OpenParenToken */:
-                            case 18 /* CloseParenToken */:
-                            case 80 /* ElseKeyword */:
-                            case 104 /* WhileKeyword */:
-                            case 55 /* AtToken */:
-                                return indentation;
-                            default:
-                                // if token line equals to the line of containing node (this is a first token in the node) - use node indentation
-                                return nodeStartLine !== line ? indentation + getEffectiveDelta(delta, container) : indentation;
-                        }
-                    },
-                    getIndentation: function () { return indentation; },
-                    getDelta: function (child) { return getEffectiveDelta(delta, child); },
-                    recomputeIndentation: function (lineAdded) {
-                        if (node.parent && formatting.SmartIndenter.shouldIndentChildNode(node.parent, node)) {
-                            if (lineAdded) {
-                                indentation += options.indentSize;
-                            }
-                            else {
-                                indentation -= options.indentSize;
-                            }
-                            if (formatting.SmartIndenter.shouldIndentChildNode(node)) {
-                                delta = options.indentSize;
-                            }
-                            else {
-                                delta = 0;
-                            }
-                        }
-                    }
-                };
-                function getEffectiveDelta(delta, child) {
-                    // Delta value should be zero when the node explicitly prevents indentation of the child node
-                    return formatting.SmartIndenter.nodeWillIndentChild(node, child, true) ? delta : 0;
+            SmartIndenter.nodeWillIndentChild = nodeWillIndentChild;
+            /*
+            Function returns true when the parent node should indent the given child by an explicit rule
+            */
+            function shouldIndentChildNode(parent, child) {
+                return nodeContentIsAlwaysIndented(parent.kind) || nodeWillIndentChild(parent, child, /*indentByDefault*/ false);
+            }
+            SmartIndenter.shouldIndentChildNode = shouldIndentChildNode;
+        })(SmartIndenter = formatting.SmartIndenter || (formatting.SmartIndenter = {}));
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+/* @internal */
+var ts;
+(function (ts) {
+    var textChanges;
+    (function (textChanges) {
+        /**
+         * Currently for simplicity we store recovered positions on the node itself.
+         * It can be changed to side-table later if we decide that current design is too invasive.
+         */
+        function getPos(n) {
+            return n["__pos"];
+        }
+        function setPos(n, pos) {
+            n["__pos"] = pos;
+        }
+        function getEnd(n) {
+            return n["__end"];
+        }
+        function setEnd(n, end) {
+            n["__end"] = end;
+        }
+        var Position;
+        (function (Position) {
+            Position[Position["FullStart"] = 0] = "FullStart";
+            Position[Position["Start"] = 1] = "Start";
+        })(Position = textChanges.Position || (textChanges.Position = {}));
+        function skipWhitespacesAndLineBreaks(text, start) {
+            return ts.skipTrivia(text, start, /*stopAfterLineBreak*/ false, /*stopAtComments*/ true);
+        }
+        function hasCommentsBeforeLineBreak(text, start) {
+            var i = start;
+            while (i < text.length) {
+                var ch = text.charCodeAt(i);
+                if (ts.isWhiteSpaceSingleLine(ch)) {
+                    i++;
+                    continue;
                 }
+                return ch === 47 /* slash */;
             }
-            function processNode(node, contextNode, nodeStartLine, undecoratedNodeStartLine, indentation, delta) {
-                if (!ts.rangeOverlapsWithStartEnd(originalRange, node.getStart(sourceFile), node.getEnd())) {
-                    return;
+            return false;
+        }
+        function getSeparatorCharacter(separator) {
+            return ts.tokenToString(separator.kind);
+        }
+        textChanges.getSeparatorCharacter = getSeparatorCharacter;
+        function getAdjustedStartPosition(sourceFile, node, options, position) {
+            if (options.useNonAdjustedStartPosition) {
+                return node.getFullStart();
+            }
+            var fullStart = node.getFullStart();
+            var start = node.getStart(sourceFile);
+            if (fullStart === start) {
+                return start;
+            }
+            var fullStartLine = ts.getLineStartPositionForPosition(fullStart, sourceFile);
+            var startLine = ts.getLineStartPositionForPosition(start, sourceFile);
+            if (startLine === fullStartLine) {
+                // full start and start of the node are on the same line
+                //   a,     b;
+                //    ^     ^
+                //    |   start
+                // fullstart
+                // when b is replaced - we usually want to keep the leading trvia
+                // when b is deleted - we delete it
+                return position === Position.Start ? start : fullStart;
+            }
+            // get start position of the line following the line that contains fullstart position
+            var adjustedStartPosition = ts.getStartPositionOfLine(ts.getLineOfLocalPosition(sourceFile, fullStartLine) + 1, sourceFile);
+            // skip whitespaces/newlines
+            adjustedStartPosition = skipWhitespacesAndLineBreaks(sourceFile.text, adjustedStartPosition);
+            return ts.getStartPositionOfLine(ts.getLineOfLocalPosition(sourceFile, adjustedStartPosition), sourceFile);
+        }
+        textChanges.getAdjustedStartPosition = getAdjustedStartPosition;
+        function getAdjustedEndPosition(sourceFile, node, options) {
+            if (options.useNonAdjustedEndPosition) {
+                return node.getEnd();
+            }
+            var end = node.getEnd();
+            var newEnd = ts.skipTrivia(sourceFile.text, end, /*stopAfterLineBreak*/ true);
+            // check if last character before newPos is linebreak
+            // if yes - considered all skipped trivia to be trailing trivia of the node
+            return newEnd !== end && ts.isLineBreak(sourceFile.text.charCodeAt(newEnd - 1))
+                ? newEnd
+                : end;
+        }
+        textChanges.getAdjustedEndPosition = getAdjustedEndPosition;
+        /**
+         * Checks if 'candidate' argument is a legal separator in the list that contains 'node' as an element
+         */
+        function isSeparator(node, candidate) {
+            return candidate && node.parent && (candidate.kind === 26 /* CommaToken */ || (candidate.kind === 25 /* SemicolonToken */ && node.parent.kind === 178 /* ObjectLiteralExpression */));
+        }
+        function spaces(count) {
+            var s = "";
+            for (var i = 0; i < count; i++) {
+                s += " ";
+            }
+            return s;
+        }
+        var ChangeTracker = (function () {
+            function ChangeTracker(newLine, rulesProvider, validator) {
+                this.newLine = newLine;
+                this.rulesProvider = rulesProvider;
+                this.validator = validator;
+                this.changes = [];
+                this.newLineCharacter = ts.getNewLineCharacter({ newLine: newLine });
+            }
+            ChangeTracker.fromCodeFixContext = function (context) {
+                return new ChangeTracker(context.newLineCharacter === "\n" ? 1 /* LineFeed */ : 0 /* CarriageReturnLineFeed */, context.rulesProvider);
+            };
+            ChangeTracker.prototype.deleteNode = function (sourceFile, node, options) {
+                if (options === void 0) { options = {}; }
+                var startPosition = getAdjustedStartPosition(sourceFile, node, options, Position.FullStart);
+                var endPosition = getAdjustedEndPosition(sourceFile, node, options);
+                this.changes.push({ sourceFile: sourceFile, options: options, range: { pos: startPosition, end: endPosition } });
+                return this;
+            };
+            ChangeTracker.prototype.deleteRange = function (sourceFile, range) {
+                this.changes.push({ sourceFile: sourceFile, range: range });
+                return this;
+            };
+            ChangeTracker.prototype.deleteNodeRange = function (sourceFile, startNode, endNode, options) {
+                if (options === void 0) { options = {}; }
+                var startPosition = getAdjustedStartPosition(sourceFile, startNode, options, Position.FullStart);
+                var endPosition = getAdjustedEndPosition(sourceFile, endNode, options);
+                this.changes.push({ sourceFile: sourceFile, options: options, range: { pos: startPosition, end: endPosition } });
+                return this;
+            };
+            ChangeTracker.prototype.deleteNodeInList = function (sourceFile, node) {
+                var containingList = ts.formatting.SmartIndenter.getContainingList(node, sourceFile);
+                if (!containingList) {
+                    ts.Debug.fail("node is not a list element");
+                    return this;
                 }
-                var nodeDynamicIndentation = getDynamicIndentation(node, nodeStartLine, indentation, delta);
-                // a useful observations when tracking context node
-                //        /
-                //      [a]
-                //   /   |   \
-                //  [b] [c] [d]
-                // node 'a' is a context node for nodes 'b', 'c', 'd'
-                // except for the leftmost leaf token in [b] - in this case context node ('e') is located somewhere above 'a'
-                // this rule can be applied recursively to child nodes of 'a'.
-                //
-                // context node is set to parent node value after processing every child node
-                // context node is set to parent of the token after processing every token
-                var childContextNode = contextNode;
-                // if there are any tokens that logically belong to node and interleave child nodes
-                // such tokens will be consumed in processChildNode for for the child that follows them
-                ts.forEachChild(node, function (child) {
-                    processChildNode(child, /*inheritedIndentation*/ -1 /* Unknown */, node, nodeDynamicIndentation, nodeStartLine, undecoratedNodeStartLine, /*isListItem*/ false);
-                }, function (nodes) {
-                    processChildNodes(nodes, node, nodeStartLine, nodeDynamicIndentation);
-                });
-                // proceed any tokens in the node that are located after child nodes
-                while (formattingScanner.isOnToken()) {
-                    var tokenInfo = formattingScanner.readTokenInfo(node);
-                    if (tokenInfo.token.end > node.end) {
-                        break;
+                var index = containingList.indexOf(node);
+                if (index < 0) {
+                    return this;
+                }
+                if (containingList.length === 1) {
+                    this.deleteNode(sourceFile, node);
+                    return this;
+                }
+                if (index !== containingList.length - 1) {
+                    var nextToken = ts.getTokenAtPosition(sourceFile, node.end, /*includeJsDocComment*/ false);
+                    if (nextToken && isSeparator(node, nextToken)) {
+                        // find first non-whitespace position in the leading trivia of the node
+                        var startPosition = ts.skipTrivia(sourceFile.text, getAdjustedStartPosition(sourceFile, node, {}, Position.FullStart), /*stopAfterLineBreak*/ false, /*stopAtComments*/ true);
+                        var nextElement = containingList[index + 1];
+                        /// find first non-whitespace position in the leading trivia of the next node
+                        var endPosition = ts.skipTrivia(sourceFile.text, getAdjustedStartPosition(sourceFile, nextElement, {}, Position.FullStart), /*stopAfterLineBreak*/ false, /*stopAtComments*/ true);
+                        // shift next node so its first non-whitespace position will be moved to the first non-whitespace position of the deleted node
+                        this.deleteRange(sourceFile, { pos: startPosition, end: endPosition });
                     }
-                    consumeTokenAndAdvanceScanner(tokenInfo, node, nodeDynamicIndentation);
                 }
-                function processChildNode(child, inheritedIndentation, parent, parentDynamicIndentation, parentStartLine, undecoratedParentStartLine, isListItem, isFirstListItem) {
-                    var childStartPos = child.getStart(sourceFile);
-                    var childStartLine = sourceFile.getLineAndCharacterOfPosition(childStartPos).line;
-                    var undecoratedChildStartLine = childStartLine;
-                    if (child.decorators) {
-                        undecoratedChildStartLine = sourceFile.getLineAndCharacterOfPosition(ts.getNonDecoratorTokenPosOfNode(child, sourceFile)).line;
+                else {
+                    var previousToken = ts.getTokenAtPosition(sourceFile, containingList[index - 1].end, /*includeJsDocComment*/ false);
+                    if (previousToken && isSeparator(node, previousToken)) {
+                        this.deleteNodeRange(sourceFile, previousToken, node);
                     }
-                    // if child is a list item - try to get its indentation
-                    var childIndentationAmount = -1 /* Unknown */;
-                    if (isListItem) {
-                        childIndentationAmount = tryComputeIndentationForListItem(childStartPos, child.end, parentStartLine, originalRange, inheritedIndentation);
-                        if (childIndentationAmount !== -1 /* Unknown */) {
-                            inheritedIndentation = childIndentationAmount;
-                        }
+                }
+                return this;
+            };
+            ChangeTracker.prototype.replaceRange = function (sourceFile, range, newNode, options) {
+                if (options === void 0) { options = {}; }
+                this.changes.push({ sourceFile: sourceFile, range: range, options: options, node: newNode });
+                return this;
+            };
+            ChangeTracker.prototype.replaceNode = function (sourceFile, oldNode, newNode, options) {
+                if (options === void 0) { options = {}; }
+                var startPosition = getAdjustedStartPosition(sourceFile, oldNode, options, Position.Start);
+                var endPosition = getAdjustedEndPosition(sourceFile, oldNode, options);
+                this.changes.push({ sourceFile: sourceFile, options: options, useIndentationFromFile: true, node: newNode, range: { pos: startPosition, end: endPosition } });
+                return this;
+            };
+            ChangeTracker.prototype.replaceNodeRange = function (sourceFile, startNode, endNode, newNode, options) {
+                if (options === void 0) { options = {}; }
+                var startPosition = getAdjustedStartPosition(sourceFile, startNode, options, Position.Start);
+                var endPosition = getAdjustedEndPosition(sourceFile, endNode, options);
+                this.changes.push({ sourceFile: sourceFile, options: options, useIndentationFromFile: true, node: newNode, range: { pos: startPosition, end: endPosition } });
+                return this;
+            };
+            ChangeTracker.prototype.insertNodeAt = function (sourceFile, pos, newNode, options) {
+                if (options === void 0) { options = {}; }
+                this.changes.push({ sourceFile: sourceFile, options: options, node: newNode, range: { pos: pos, end: pos } });
+                return this;
+            };
+            ChangeTracker.prototype.insertNodeBefore = function (sourceFile, before, newNode, options) {
+                if (options === void 0) { options = {}; }
+                var startPosition = getAdjustedStartPosition(sourceFile, before, options, Position.Start);
+                this.changes.push({ sourceFile: sourceFile, options: options, useIndentationFromFile: true, node: newNode, range: { pos: startPosition, end: startPosition } });
+                return this;
+            };
+            ChangeTracker.prototype.insertNodeAfter = function (sourceFile, after, newNode, options) {
+                if (options === void 0) { options = {}; }
+                if ((ts.isStatementButNotDeclaration(after)) ||
+                    after.kind === 149 /* PropertyDeclaration */ ||
+                    after.kind === 148 /* PropertySignature */ ||
+                    after.kind === 150 /* MethodSignature */) {
+                    // check if previous statement ends with semicolon
+                    // if not - insert semicolon to preserve the code from changing the meaning due to ASI
+                    if (sourceFile.text.charCodeAt(after.end - 1) !== 59 /* semicolon */) {
+                        this.changes.push({
+                            sourceFile: sourceFile,
+                            options: {},
+                            range: { pos: after.end, end: after.end },
+                            node: ts.createToken(25 /* SemicolonToken */)
+                        });
                     }
-                    // child node is outside the target range - do not dive inside
-                    if (!ts.rangeOverlapsWithStartEnd(originalRange, child.pos, child.end)) {
-                        if (child.end < originalRange.pos) {
-                            formattingScanner.skipToEndOf(child);
+                }
+                var endPosition = getAdjustedEndPosition(sourceFile, after, options);
+                this.changes.push({ sourceFile: sourceFile, options: options, useIndentationFromFile: true, node: newNode, range: { pos: endPosition, end: endPosition } });
+                return this;
+            };
+            /**
+             * This function should be used to insert nodes in lists when nodes don't carry separators as the part of the node range,
+             * i.e. arguments in arguments lists, parameters in parameter lists etc.
+             * Note that separators are part of the node in statements and class elements.
+             */
+            ChangeTracker.prototype.insertNodeInListAfter = function (sourceFile, after, newNode) {
+                var containingList = ts.formatting.SmartIndenter.getContainingList(after, sourceFile);
+                if (!containingList) {
+                    ts.Debug.fail("node is not a list element");
+                    return this;
+                }
+                var index = containingList.indexOf(after);
+                if (index < 0) {
+                    return this;
+                }
+                var end = after.getEnd();
+                if (index !== containingList.length - 1) {
+                    // any element except the last one
+                    // use next sibling as an anchor
+                    var nextToken = ts.getTokenAtPosition(sourceFile, after.end, /*includeJsDocComment*/ false);
+                    if (nextToken && isSeparator(after, nextToken)) {
+                        // for list
+                        // a, b, c
+                        // create change for adding 'e' after 'a' as
+                        // - find start of next element after a (it is b)
+                        // - use this start as start and end position in final change
+                        // - build text of change by formatting the text of node + separator + whitespace trivia of b
+                        // in multiline case it will work as
+                        //   a,
+                        //   b,
+                        //   c,
+                        // result - '*' denotes leading trivia that will be inserted after new text (displayed as '#')
+                        //   a,*
+                        // ***insertedtext<separator>#
+                        // ###b,
+                        //   c,
+                        // find line and character of the next element
+                        var lineAndCharOfNextElement = ts.getLineAndCharacterOfPosition(sourceFile, skipWhitespacesAndLineBreaks(sourceFile.text, containingList[index + 1].getFullStart()));
+                        // find line and character of the token that precedes next element (usually it is separator)
+                        var lineAndCharOfNextToken = ts.getLineAndCharacterOfPosition(sourceFile, nextToken.end);
+                        var prefix = void 0;
+                        var startPos = void 0;
+                        if (lineAndCharOfNextToken.line === lineAndCharOfNextElement.line) {
+                            // next element is located on the same line with separator:
+                            // a,$$$$b
+                            //  ^    ^
+                            //  |    |-next element
+                            //  |-separator
+                            // where $$$ is some leading trivia
+                            // for a newly inserted node we'll maintain the same relative position comparing to separator and replace leading trivia with spaces
+                            // a,    x,$$$$b
+                            //  ^    ^     ^
+                            //  |    |     |-next element
+                            //  |    |-new inserted node padded with spaces
+                            //  |-separator
+                            startPos = nextToken.end;
+                            prefix = spaces(lineAndCharOfNextElement.character - lineAndCharOfNextToken.character);
                         }
-                        return inheritedIndentation;
-                    }
-                    if (child.getFullWidth() === 0) {
-                        return inheritedIndentation;
+                        else {
+                            // next element is located on different line that separator
+                            // let insert position be the beginning of the line that contains next element
+                            startPos = ts.getStartPositionOfLine(lineAndCharOfNextElement.line, sourceFile);
+                        }
+                        this.changes.push({
+                            sourceFile: sourceFile,
+                            range: { pos: startPos, end: containingList[index + 1].getStart(sourceFile) },
+                            node: newNode,
+                            useIndentationFromFile: true,
+                            options: {
+                                prefix: prefix,
+                                // write separator and leading trivia of the next element as suffix
+                                suffix: "" + ts.tokenToString(nextToken.kind) + sourceFile.text.substring(nextToken.end, containingList[index + 1].getStart(sourceFile))
+                            }
+                        });
                     }
-                    while (formattingScanner.isOnToken()) {
-                        // proceed any parent tokens that are located prior to child.getStart()
-                        var tokenInfo = formattingScanner.readTokenInfo(node);
-                        if (tokenInfo.token.end > childStartPos) {
-                            // stop when formatting scanner advances past the beginning of the child
-                            break;
-                        }
-                        consumeTokenAndAdvanceScanner(tokenInfo, node, parentDynamicIndentation);
+                }
+                else {
+                    var afterStart = after.getStart(sourceFile);
+                    var afterStartLinePosition = ts.getLineStartPositionForPosition(afterStart, sourceFile);
+                    var separator = void 0;
+                    var multilineList = false;
+                    // insert element after the last element in the list that has more than one item
+                    // pick the element preceding the after element to:
+                    // - pick the separator
+                    // - determine if list is a multiline
+                    if (containingList.length === 1) {
+                        // if list has only one element then we'll format is as multiline if node has comment in trailing trivia, or as singleline otherwise
+                        // i.e. var x = 1 // this is x
+                        //     | new element will be inserted at this position
+                        separator = 26 /* CommaToken */;
                     }
-                    if (!formattingScanner.isOnToken()) {
-                        return inheritedIndentation;
+                    else {
+                        // element has more than one element, pick separator from the list
+                        var tokenBeforeInsertPosition = ts.findPrecedingToken(after.pos, sourceFile);
+                        separator = isSeparator(after, tokenBeforeInsertPosition) ? tokenBeforeInsertPosition.kind : 26 /* CommaToken */;
+                        // determine if list is multiline by checking lines of after element and element that precedes it.
+                        var afterMinusOneStartLinePosition = ts.getLineStartPositionForPosition(containingList[index - 1].getStart(sourceFile), sourceFile);
+                        multilineList = afterMinusOneStartLinePosition !== afterStartLinePosition;
+                    }
+                    if (hasCommentsBeforeLineBreak(sourceFile.text, after.end)) {
+                        // in this case we'll always treat containing list as multiline
+                        multilineList = true;
+                    }
+                    if (multilineList) {
+                        // insert separator immediately following the 'after' node to preserve comments in trailing trivia
+                        this.changes.push({
+                            sourceFile: sourceFile,
+                            range: { pos: end, end: end },
+                            node: ts.createToken(separator),
+                            options: {}
+                        });
+                        // use the same indentation as 'after' item
+                        var indentation = ts.formatting.SmartIndenter.findFirstNonWhitespaceColumn(afterStartLinePosition, afterStart, sourceFile, this.rulesProvider.getFormatOptions());
+                        // insert element before the line break on the line that contains 'after' element
+                        var insertPos = ts.skipTrivia(sourceFile.text, end, /*stopAfterLineBreak*/ true, /*stopAtComments*/ false);
+                        if (insertPos !== end && ts.isLineBreak(sourceFile.text.charCodeAt(insertPos - 1))) {
+                            insertPos--;
+                        }
+                        this.changes.push({
+                            sourceFile: sourceFile,
+                            range: { pos: insertPos, end: insertPos },
+                            node: newNode,
+                            options: { indentation: indentation, prefix: this.newLineCharacter }
+                        });
                     }
-                    if (ts.isToken(child)) {
-                        // if child node is a token, it does not impact indentation, proceed it using parent indentation scope rules
-                        var tokenInfo = formattingScanner.readTokenInfo(child);
-                        ts.Debug.assert(tokenInfo.token.end === child.end);
-                        consumeTokenAndAdvanceScanner(tokenInfo, node, parentDynamicIndentation, child);
-                        return inheritedIndentation;
+                    else {
+                        this.changes.push({
+                            sourceFile: sourceFile,
+                            range: { pos: end, end: end },
+                            node: newNode,
+                            options: { prefix: ts.tokenToString(separator) + " " }
+                        });
                     }
-                    var effectiveParentStartLine = child.kind === 143 /* Decorator */ ? childStartLine : undecoratedParentStartLine;
-                    var childIndentation = computeIndentation(child, childStartLine, childIndentationAmount, node, parentDynamicIndentation, effectiveParentStartLine);
-                    processNode(child, childContextNode, childStartLine, undecoratedChildStartLine, childIndentation.indentation, childIndentation.delta);
-                    childContextNode = node;
-                    if (isFirstListItem && parent.kind === 170 /* ArrayLiteralExpression */ && inheritedIndentation === -1 /* Unknown */) {
-                        inheritedIndentation = childIndentation.indentation;
+                }
+                return this;
+            };
+            ChangeTracker.prototype.getChanges = function () {
+                var _this = this;
+                var changesPerFile = ts.createFileMap();
+                // group changes per file
+                for (var _i = 0, _a = this.changes; _i < _a.length; _i++) {
+                    var c = _a[_i];
+                    var changesInFile = changesPerFile.get(c.sourceFile.path);
+                    if (!changesInFile) {
+                        changesPerFile.set(c.sourceFile.path, changesInFile = []);
+                    }
+                    changesInFile.push(c);
+                }
+                // convert changes
+                var fileChangesList = [];
+                changesPerFile.forEachValue(function (path) {
+                    var changesInFile = changesPerFile.get(path);
+                    var sourceFile = changesInFile[0].sourceFile;
+                    var fileTextChanges = { fileName: sourceFile.fileName, textChanges: [] };
+                    for (var _i = 0, _a = ChangeTracker.normalize(changesInFile); _i < _a.length; _i++) {
+                        var c = _a[_i];
+                        fileTextChanges.textChanges.push({
+                            span: _this.computeSpan(c, sourceFile),
+                            newText: _this.computeNewText(c, sourceFile)
+                        });
                     }
-                    return inheritedIndentation;
+                    fileChangesList.push(fileTextChanges);
+                });
+                return fileChangesList;
+            };
+            ChangeTracker.prototype.computeSpan = function (change, _sourceFile) {
+                return ts.createTextSpanFromBounds(change.range.pos, change.range.end);
+            };
+            ChangeTracker.prototype.computeNewText = function (change, sourceFile) {
+                if (!change.node) {
+                    // deletion case
+                    return "";
                 }
-                function processChildNodes(nodes, parent, parentStartLine, parentDynamicIndentation) {
-                    var listStartToken = getOpenTokenForList(parent, nodes);
-                    var listEndToken = getCloseTokenForOpenToken(listStartToken);
-                    var listDynamicIndentation = parentDynamicIndentation;
-                    var startLine = parentStartLine;
-                    if (listStartToken !== 0 /* Unknown */) {
-                        // introduce a new indentation scope for lists (including list start and end tokens)
-                        while (formattingScanner.isOnToken()) {
-                            var tokenInfo = formattingScanner.readTokenInfo(parent);
-                            if (tokenInfo.token.end > nodes.pos) {
-                                // stop when formatting scanner moves past the beginning of node list
-                                break;
-                            }
-                            else if (tokenInfo.token.kind === listStartToken) {
-                                // consume list start token
-                                startLine = sourceFile.getLineAndCharacterOfPosition(tokenInfo.token.pos).line;
-                                var indentation_1 = computeIndentation(tokenInfo.token, startLine, -1 /* Unknown */, parent, parentDynamicIndentation, parentStartLine);
-                                listDynamicIndentation = getDynamicIndentation(parent, parentStartLine, indentation_1.indentation, indentation_1.delta);
-                                consumeTokenAndAdvanceScanner(tokenInfo, parent, listDynamicIndentation);
-                            }
-                            else {
-                                // consume any tokens that precede the list as child elements of 'node' using its indentation scope
-                                consumeTokenAndAdvanceScanner(tokenInfo, parent, parentDynamicIndentation);
-                            }
-                        }
+                var options = change.options || {};
+                var nonFormattedText = getNonformattedText(change.node, sourceFile, this.newLine);
+                if (this.validator) {
+                    this.validator(nonFormattedText);
+                }
+                var formatOptions = this.rulesProvider.getFormatOptions();
+                var pos = change.range.pos;
+                var posStartsLine = ts.getLineStartPositionForPosition(pos, sourceFile) === pos;
+                var initialIndentation = change.options.indentation !== undefined
+                    ? change.options.indentation
+                    : change.useIndentationFromFile
+                        ? ts.formatting.SmartIndenter.getIndentation(change.range.pos, sourceFile, formatOptions, posStartsLine || (change.options.prefix === this.newLineCharacter))
+                        : 0;
+                var delta = change.options.delta !== undefined
+                    ? change.options.delta
+                    : ts.formatting.SmartIndenter.shouldIndentChildNode(change.node)
+                        ? formatOptions.indentSize
+                        : 0;
+                var text = applyFormatting(nonFormattedText, sourceFile, initialIndentation, delta, this.rulesProvider);
+                // strip initial indentation (spaces or tabs) if text will be inserted in the middle of the line
+                // however keep indentation if it is was forced
+                text = posStartsLine || change.options.indentation !== undefined ? text : text.replace(/^\s+/, "");
+                return (options.prefix || "") + text + (options.suffix || "");
+            };
+            ChangeTracker.normalize = function (changes) {
+                // order changes by start position
+                var normalized = ts.stableSort(changes, function (a, b) { return a.range.pos - b.range.pos; });
+                // verify that change intervals do not overlap, except possibly at end points.
+                for (var i = 0; i < normalized.length - 2; i++) {
+                    ts.Debug.assert(normalized[i].range.end <= normalized[i + 1].range.pos);
+                }
+                return normalized;
+            };
+            return ChangeTracker;
+        }());
+        textChanges.ChangeTracker = ChangeTracker;
+        function getNonformattedText(node, sourceFile, newLine) {
+            var options = { newLine: newLine, target: sourceFile && sourceFile.languageVersion };
+            var writer = new Writer(ts.getNewLineCharacter(options));
+            var printer = ts.createPrinter(options, writer);
+            printer.writeNode(3 /* Unspecified */, node, sourceFile, writer);
+            return { text: writer.getText(), node: assignPositionsToNode(node) };
+        }
+        textChanges.getNonformattedText = getNonformattedText;
+        function applyFormatting(nonFormattedText, sourceFile, initialIndentation, delta, rulesProvider) {
+            var lineMap = ts.computeLineStarts(nonFormattedText.text);
+            var file = {
+                text: nonFormattedText.text,
+                lineMap: lineMap,
+                getLineAndCharacterOfPosition: function (pos) { return ts.computeLineAndCharacterOfPosition(lineMap, pos); }
+            };
+            var changes = ts.formatting.formatNode(nonFormattedText.node, file, sourceFile.languageVariant, initialIndentation, delta, rulesProvider);
+            return applyChanges(nonFormattedText.text, changes);
+        }
+        textChanges.applyFormatting = applyFormatting;
+        function applyChanges(text, changes) {
+            for (var i = changes.length - 1; i >= 0; i--) {
+                var change = changes[i];
+                text = "" + text.substring(0, change.span.start) + change.newText + text.substring(ts.textSpanEnd(change.span));
+            }
+            return text;
+        }
+        textChanges.applyChanges = applyChanges;
+        function isTrivia(s) {
+            return ts.skipTrivia(s, 0) === s.length;
+        }
+        function assignPositionsToNode(node) {
+            var visited = ts.visitEachChild(node, assignPositionsToNode, ts.nullTransformationContext, assignPositionsToNodeArray, assignPositionsToNode);
+            // create proxy node for non synthesized nodes
+            var newNode = ts.nodeIsSynthesized(visited)
+                ? visited
+                : (Proxy.prototype = visited, new Proxy());
+            newNode.pos = getPos(node);
+            newNode.end = getEnd(node);
+            return newNode;
+            function Proxy() { }
+        }
+        function assignPositionsToNodeArray(nodes, visitor, test, start, count) {
+            var visited = ts.visitNodes(nodes, visitor, test, start, count);
+            if (!visited) {
+                return visited;
+            }
+            // clone nodearray if necessary
+            var nodeArray = visited === nodes ? ts.createNodeArray(visited.slice(0)) : visited;
+            nodeArray.pos = getPos(nodes);
+            nodeArray.end = getEnd(nodes);
+            return nodeArray;
+        }
+        var Writer = (function () {
+            function Writer(newLine) {
+                var _this = this;
+                this.lastNonTriviaPosition = 0;
+                this.writer = ts.createTextWriter(newLine);
+                this.onEmitNode = function (hint, node, printCallback) {
+                    if (node) {
+                        setPos(node, _this.lastNonTriviaPosition);
                     }
-                    var inheritedIndentation = -1 /* Unknown */;
-                    for (var i = 0; i < nodes.length; i++) {
-                        var child = nodes[i];
-                        inheritedIndentation = processChildNode(child, inheritedIndentation, node, listDynamicIndentation, startLine, startLine, /*isListItem*/ true, /*isFirstListItem*/ i === 0);
+                    printCallback(hint, node);
+                    if (node) {
+                        setEnd(node, _this.lastNonTriviaPosition);
                     }
-                    if (listEndToken !== 0 /* Unknown */) {
-                        if (formattingScanner.isOnToken()) {
-                            var tokenInfo = formattingScanner.readTokenInfo(parent);
-                            // consume the list end token only if it is still belong to the parent
-                            // there might be the case when current token matches end token but does not considered as one
-                            // function (x: function) <--
-                            // without this check close paren will be interpreted as list end token for function expression which is wrong
-                            if (tokenInfo.token.kind === listEndToken && ts.rangeContainsRange(parent, tokenInfo.token)) {
-                                // consume list end token
-                                consumeTokenAndAdvanceScanner(tokenInfo, parent, listDynamicIndentation);
-                            }
-                        }
+                };
+                this.onBeforeEmitNodeArray = function (nodes) {
+                    if (nodes) {
+                        setPos(nodes, _this.lastNonTriviaPosition);
                     }
-                }
-                function consumeTokenAndAdvanceScanner(currentTokenInfo, parent, dynamicIndentation, container) {
-                    ts.Debug.assert(ts.rangeContainsRange(parent, currentTokenInfo.token));
-                    var lastTriviaWasNewLine = formattingScanner.lastTrailingTriviaWasNewLine();
-                    var indentToken = false;
-                    if (currentTokenInfo.leadingTrivia) {
-                        processTrivia(currentTokenInfo.leadingTrivia, parent, childContextNode, dynamicIndentation);
+                };
+                this.onAfterEmitNodeArray = function (nodes) {
+                    if (nodes) {
+                        setEnd(nodes, _this.lastNonTriviaPosition);
                     }
-                    var lineAdded;
-                    var isTokenInRange = ts.rangeContainsRange(originalRange, currentTokenInfo.token);
-                    var tokenStart = sourceFile.getLineAndCharacterOfPosition(currentTokenInfo.token.pos);
-                    if (isTokenInRange) {
-                        var rangeHasError = rangeContainsError(currentTokenInfo.token);
-                        // save previousRange since processRange will overwrite this value with current one
-                        var savePreviousRange = previousRange;
-                        lineAdded = processRange(currentTokenInfo.token, tokenStart, parent, childContextNode, dynamicIndentation);
-                        if (rangeHasError) {
-                            // do not indent comments\token if token range overlaps with some error
-                            indentToken = false;
-                        }
-                        else {
-                            if (lineAdded !== undefined) {
-                                indentToken = lineAdded;
-                            }
-                            else {
-                                // indent token only if end line of previous range does not match start line of the token
-                                var prevEndLine = savePreviousRange && sourceFile.getLineAndCharacterOfPosition(savePreviousRange.end).line;
-                                indentToken = lastTriviaWasNewLine && tokenStart.line !== prevEndLine;
-                            }
-                        }
+                };
+                this.onBeforeEmitToken = function (node) {
+                    if (node) {
+                        setPos(node, _this.lastNonTriviaPosition);
                     }
-                    if (currentTokenInfo.trailingTrivia) {
-                        processTrivia(currentTokenInfo.trailingTrivia, parent, childContextNode, dynamicIndentation);
+                };
+                this.onAfterEmitToken = function (node) {
+                    if (node) {
+                        setEnd(node, _this.lastNonTriviaPosition);
                     }
-                    if (indentToken) {
-                        var tokenIndentation = (isTokenInRange && !rangeContainsError(currentTokenInfo.token)) ?
-                            dynamicIndentation.getIndentationForToken(tokenStart.line, currentTokenInfo.token.kind, container) :
-                            -1 /* Unknown */;
-                        var indentNextTokenOrTrivia = true;
-                        if (currentTokenInfo.leadingTrivia) {
-                            var commentIndentation = dynamicIndentation.getIndentationForComment(currentTokenInfo.token.kind, tokenIndentation, container);
-                            for (var _i = 0, _a = currentTokenInfo.leadingTrivia; _i < _a.length; _i++) {
-                                var triviaItem = _a[_i];
-                                var triviaInRange = ts.rangeContainsRange(originalRange, triviaItem);
-                                switch (triviaItem.kind) {
-                                    case 3 /* MultiLineCommentTrivia */:
-                                        if (triviaInRange) {
-                                            indentMultilineComment(triviaItem, commentIndentation, /*firstLineIsIndented*/ !indentNextTokenOrTrivia);
-                                        }
-                                        indentNextTokenOrTrivia = false;
-                                        break;
-                                    case 2 /* SingleLineCommentTrivia */:
-                                        if (indentNextTokenOrTrivia && triviaInRange) {
-                                            insertIndentation(triviaItem.pos, commentIndentation, /*lineAdded*/ false);
-                                        }
-                                        indentNextTokenOrTrivia = false;
-                                        break;
-                                    case 4 /* NewLineTrivia */:
-                                        indentNextTokenOrTrivia = true;
-                                        break;
-                                }
-                            }
-                        }
-                        // indent token only if is it is in target range and does not overlap with any error ranges
-                        if (tokenIndentation !== -1 /* Unknown */ && indentNextTokenOrTrivia) {
-                            insertIndentation(currentTokenInfo.token.pos, tokenIndentation, lineAdded);
-                            lastIndentedLine = tokenStart.line;
-                            indentationOnLastIndentedLine = tokenIndentation;
-                        }
+                };
+            }
+            Writer.prototype.setLastNonTriviaPosition = function (s, force) {
+                if (force || !isTrivia(s)) {
+                    this.lastNonTriviaPosition = this.writer.getTextPos();
+                    var i = 0;
+                    while (ts.isWhiteSpaceLike(s.charCodeAt(s.length - i - 1))) {
+                        i++;
                     }
-                    formattingScanner.advance();
-                    childContextNode = parent;
+                    // trim trailing whitespaces
+                    this.lastNonTriviaPosition -= i;
+                }
+            };
+            Writer.prototype.write = function (s) {
+                this.writer.write(s);
+                this.setLastNonTriviaPosition(s, /*force*/ false);
+            };
+            Writer.prototype.writeTextOfNode = function (text, node) {
+                this.writer.writeTextOfNode(text, node);
+            };
+            Writer.prototype.writeLine = function () {
+                this.writer.writeLine();
+            };
+            Writer.prototype.increaseIndent = function () {
+                this.writer.increaseIndent();
+            };
+            Writer.prototype.decreaseIndent = function () {
+                this.writer.decreaseIndent();
+            };
+            Writer.prototype.getText = function () {
+                return this.writer.getText();
+            };
+            Writer.prototype.rawWrite = function (s) {
+                this.writer.rawWrite(s);
+                this.setLastNonTriviaPosition(s, /*force*/ false);
+            };
+            Writer.prototype.writeLiteral = function (s) {
+                this.writer.writeLiteral(s);
+                this.setLastNonTriviaPosition(s, /*force*/ true);
+            };
+            Writer.prototype.getTextPos = function () {
+                return this.writer.getTextPos();
+            };
+            Writer.prototype.getLine = function () {
+                return this.writer.getLine();
+            };
+            Writer.prototype.getColumn = function () {
+                return this.writer.getColumn();
+            };
+            Writer.prototype.getIndent = function () {
+                return this.writer.getIndent();
+            };
+            Writer.prototype.isAtStartOfLine = function () {
+                return this.writer.isAtStartOfLine();
+            };
+            Writer.prototype.reset = function () {
+                this.writer.reset();
+                this.lastNonTriviaPosition = 0;
+            };
+            return Writer;
+        }());
+    })(textChanges = ts.textChanges || (ts.textChanges = {}));
+})(ts || (ts = {}));
+/* @internal */
+var ts;
+(function (ts) {
+    var codefix;
+    (function (codefix) {
+        var codeFixes = [];
+        function registerCodeFix(codeFix) {
+            ts.forEach(codeFix.errorCodes, function (error) {
+                var fixes = codeFixes[error];
+                if (!fixes) {
+                    fixes = [];
+                    codeFixes[error] = fixes;
+                }
+                fixes.push(codeFix);
+            });
+        }
+        codefix.registerCodeFix = registerCodeFix;
+        function getSupportedErrorCodes() {
+            return Object.keys(codeFixes);
+        }
+        codefix.getSupportedErrorCodes = getSupportedErrorCodes;
+        function getFixes(context) {
+            var fixes = codeFixes[context.errorCode];
+            var allActions = [];
+            ts.forEach(fixes, function (f) {
+                var actions = f.getCodeActions(context);
+                if (actions && actions.length > 0) {
+                    allActions = allActions.concat(actions);
+                }
+            });
+            return allActions;
+        }
+        codefix.getFixes = getFixes;
+    })(codefix = ts.codefix || (ts.codefix = {}));
+})(ts || (ts = {}));
+/* @internal */
+var ts;
+(function (ts) {
+    var refactor;
+    (function (refactor_1) {
+        // A map with the refactor code as key, the refactor itself as value
+        // e.g.  nonSuggestableRefactors[refactorCode] -> the refactor you want
+        var refactors = ts.createMap();
+        function registerRefactor(refactor) {
+            refactors.set(refactor.name, refactor);
+        }
+        refactor_1.registerRefactor = registerRefactor;
+        function getApplicableRefactors(context) {
+            var results;
+            var refactorList = [];
+            refactors.forEach(function (refactor) {
+                refactorList.push(refactor);
+            });
+            for (var _i = 0, refactorList_1 = refactorList; _i < refactorList_1.length; _i++) {
+                var refactor_2 = refactorList_1[_i];
+                if (context.cancellationToken && context.cancellationToken.isCancellationRequested()) {
+                    return results;
+                }
+                var infos = refactor_2.getAvailableActions(context);
+                if (infos && infos.length) {
+                    (_a = (results || (results = []))).push.apply(_a, infos);
+                }
+            }
+            return results;
+            var _a;
+        }
+        refactor_1.getApplicableRefactors = getApplicableRefactors;
+        function getEditsForRefactor(context, refactorName, actionName) {
+            var refactor = refactors.get(refactorName);
+            return refactor && refactor.getEditsForAction(context, actionName);
+        }
+        refactor_1.getEditsForRefactor = getEditsForRefactor;
+    })(refactor = ts.refactor || (ts.refactor = {}));
+})(ts || (ts = {}));
+/* @internal */
+var ts;
+(function (ts) {
+    var codefix;
+    (function (codefix) {
+        codefix.registerCodeFix({
+            errorCodes: [ts.Diagnostics.Class_0_incorrectly_implements_interface_1.code],
+            getCodeActions: getActionForClassLikeIncorrectImplementsInterface
+        });
+        function getActionForClassLikeIncorrectImplementsInterface(context) {
+            var sourceFile = context.sourceFile;
+            var start = context.span.start;
+            var token = ts.getTokenAtPosition(sourceFile, start, /*includeJsDocComment*/ false);
+            var checker = context.program.getTypeChecker();
+            var classDeclaration = ts.getContainingClass(token);
+            if (!classDeclaration) {
+                return undefined;
+            }
+            var openBrace = ts.getOpenBraceOfClassLike(classDeclaration, sourceFile);
+            var classType = checker.getTypeAtLocation(classDeclaration);
+            var implementedTypeNodes = ts.getClassImplementsHeritageClauseElements(classDeclaration);
+            var hasNumericIndexSignature = !!checker.getIndexTypeOfType(classType, 1 /* Number */);
+            var hasStringIndexSignature = !!checker.getIndexTypeOfType(classType, 0 /* String */);
+            var result = [];
+            for (var _i = 0, implementedTypeNodes_2 = implementedTypeNodes; _i < implementedTypeNodes_2.length; _i++) {
+                var implementedTypeNode = implementedTypeNodes_2[_i];
+                // Note that this is ultimately derived from a map indexed by symbol names,
+                // so duplicates cannot occur.
+                var implementedType = checker.getTypeAtLocation(implementedTypeNode);
+                var implementedTypeSymbols = checker.getPropertiesOfType(implementedType);
+                var nonPrivateMembers = implementedTypeSymbols.filter(function (symbol) { return !(ts.getModifierFlags(symbol.valueDeclaration) & 8 /* Private */); });
+                var newNodes = [];
+                createAndAddMissingIndexSignatureDeclaration(implementedType, 1 /* Number */, hasNumericIndexSignature, newNodes);
+                createAndAddMissingIndexSignatureDeclaration(implementedType, 0 /* String */, hasStringIndexSignature, newNodes);
+                newNodes = newNodes.concat(codefix.createMissingMemberNodes(classDeclaration, nonPrivateMembers, checker));
+                var message = ts.formatStringFromArgs(ts.getLocaleSpecificMessage(ts.Diagnostics.Implement_interface_0), [implementedTypeNode.getText()]);
+                if (newNodes.length > 0) {
+                    pushAction(result, newNodes, message);
+                }
+            }
+            return result;
+            function createAndAddMissingIndexSignatureDeclaration(type, kind, hasIndexSigOfKind, newNodes) {
+                if (hasIndexSigOfKind) {
+                    return;
                 }
-            }
-            function processTrivia(trivia, parent, contextNode, dynamicIndentation) {
-                for (var _i = 0, trivia_1 = trivia; _i < trivia_1.length; _i++) {
-                    var triviaItem = trivia_1[_i];
-                    if (ts.isComment(triviaItem.kind) && ts.rangeContainsRange(originalRange, triviaItem)) {
-                        var triviaItemStart = sourceFile.getLineAndCharacterOfPosition(triviaItem.pos);
-                        processRange(triviaItem, triviaItemStart, parent, contextNode, dynamicIndentation);
-                    }
+                var indexInfoOfKind = checker.getIndexInfoOfType(type, kind);
+                if (!indexInfoOfKind) {
+                    return;
                 }
+                var newIndexSignatureDeclaration = checker.indexInfoToIndexSignatureDeclaration(indexInfoOfKind, kind, classDeclaration);
+                newNodes.push(newIndexSignatureDeclaration);
             }
-            function processRange(range, rangeStart, parent, contextNode, dynamicIndentation) {
-                var rangeHasError = rangeContainsError(range);
-                var lineAdded;
-                if (!rangeHasError && !previousRangeHasError) {
-                    if (!previousRange) {
-                        // trim whitespaces starting from the beginning of the span up to the current line
-                        var originalStart = sourceFile.getLineAndCharacterOfPosition(originalRange.pos);
-                        trimTrailingWhitespacesForLines(originalStart.line, rangeStart.line);
-                    }
-                    else {
-                        lineAdded =
-                            processPair(range, rangeStart.line, parent, previousRange, previousRangeStartLine, previousParent, contextNode, dynamicIndentation);
-                    }
+            function pushAction(result, newNodes, description) {
+                var newAction = {
+                    description: description,
+                    changes: codefix.newNodesToChanges(newNodes, openBrace, context)
+                };
+                result.push(newAction);
+            }
+        }
+    })(codefix = ts.codefix || (ts.codefix = {}));
+})(ts || (ts = {}));
+/* @internal */
+var ts;
+(function (ts) {
+    var codefix;
+    (function (codefix) {
+        codefix.registerCodeFix({
+            errorCodes: [ts.Diagnostics.Property_0_does_not_exist_on_type_1.code,
+                ts.Diagnostics.Property_0_does_not_exist_on_type_1_Did_you_mean_2.code],
+            getCodeActions: getActionsForAddMissingMember
+        });
+        function getActionsForAddMissingMember(context) {
+            var tokenSourceFile = context.sourceFile;
+            var start = context.span.start;
+            // The identifier of the missing property. eg:
+            // this.missing = 1;
+            //      ^^^^^^^
+            var token = ts.getTokenAtPosition(tokenSourceFile, start, /*includeJsDocComment*/ false);
+            if (token.kind !== 71 /* Identifier */) {
+                return undefined;
+            }
+            if (!ts.isPropertyAccessExpression(token.parent)) {
+                return undefined;
+            }
+            var tokenName = token.getText(tokenSourceFile);
+            var makeStatic = false;
+            var classDeclaration;
+            if (token.parent.expression.kind === 99 /* ThisKeyword */) {
+                var containingClassMemberDeclaration = ts.getThisContainer(token, /*includeArrowFunctions*/ false);
+                if (!ts.isClassElement(containingClassMemberDeclaration)) {
+                    return undefined;
                 }
-                previousRange = range;
-                previousParent = parent;
-                previousRangeStartLine = rangeStart.line;
-                previousRangeHasError = rangeHasError;
-                return lineAdded;
+                classDeclaration = containingClassMemberDeclaration.parent;
+                // Property accesses on `this` in a static method are accesses of a static member.
+                makeStatic = classDeclaration && ts.hasModifier(containingClassMemberDeclaration, 32 /* Static */);
             }
-            function processPair(currentItem, currentStartLine, currentParent, previousItem, previousStartLine, previousParent, contextNode, dynamicIndentation) {
-                formattingContext.updateContext(previousItem, previousParent, currentItem, currentParent, contextNode);
-                var rule = rulesProvider.getRulesMap().GetRule(formattingContext);
-                var trimTrailingWhitespaces;
-                var lineAdded;
-                if (rule) {
-                    applyRuleEdits(rule, previousItem, previousStartLine, currentItem, currentStartLine);
-                    if (rule.Operation.Action & (2 /* Space */ | 8 /* Delete */) && currentStartLine !== previousStartLine) {
-                        lineAdded = false;
-                        // Handle the case where the next line is moved to be the end of this line.
-                        // In this case we don't indent the next line in the next pass.
-                        if (currentParent.getStart(sourceFile) === currentItem.pos) {
-                            dynamicIndentation.recomputeIndentation(/*lineAddedByFormatting*/ false);
-                        }
-                    }
-                    else if (rule.Operation.Action & 4 /* NewLine */ && currentStartLine === previousStartLine) {
-                        lineAdded = true;
-                        // Handle the case where token2 is moved to the new line.
-                        // In this case we indent token2 in the next pass but we set
-                        // sameLineIndent flag to notify the indenter that the indentation is within the line.
-                        if (currentParent.getStart(sourceFile) === currentItem.pos) {
-                            dynamicIndentation.recomputeIndentation(/*lineAddedByFormatting*/ true);
+            else {
+                var checker = context.program.getTypeChecker();
+                var leftExpression = token.parent.expression;
+                var leftExpressionType = checker.getTypeAtLocation(leftExpression);
+                if (leftExpressionType.flags & 32768 /* Object */) {
+                    var symbol = leftExpressionType.symbol;
+                    if (symbol.flags & 32 /* Class */) {
+                        classDeclaration = symbol.declarations && symbol.declarations[0];
+                        if (leftExpressionType !== checker.getDeclaredTypeOfSymbol(symbol)) {
+                            // The expression is a class symbol but the type is not the instance-side.
+                            makeStatic = true;
                         }
                     }
-                    // We need to trim trailing whitespace between the tokens if they were on different lines, and no rule was applied to put them on the same line
-                    trimTrailingWhitespaces = !(rule.Operation.Action & 8 /* Delete */) && rule.Flag !== 1 /* CanDeleteNewLines */;
-                }
-                else {
-                    trimTrailingWhitespaces = true;
-                }
-                if (currentStartLine !== previousStartLine && trimTrailingWhitespaces) {
-                    // We need to trim trailing whitespace between the tokens if they were on different lines, and no rule was applied to put them on the same line
-                    trimTrailingWhitespacesForLines(previousStartLine, currentStartLine, previousItem);
                 }
-                return lineAdded;
             }
-            function insertIndentation(pos, indentation, lineAdded) {
-                var indentationString = getIndentationString(indentation, options);
-                if (lineAdded) {
-                    // new line is added before the token by the formatting rules
-                    // insert indentation string at the very beginning of the token
-                    recordReplace(pos, 0, indentationString);
+            if (!classDeclaration || !ts.isClassLike(classDeclaration)) {
+                return undefined;
+            }
+            var classDeclarationSourceFile = ts.getSourceFileOfNode(classDeclaration);
+            var classOpenBrace = ts.getOpenBraceOfClassLike(classDeclaration, classDeclarationSourceFile);
+            return ts.isInJavaScriptFile(classDeclarationSourceFile) ?
+                getActionsForAddMissingMemberInJavaScriptFile(classDeclaration, makeStatic) :
+                getActionsForAddMissingMemberInTypeScriptFile(classDeclaration, makeStatic);
+            function getActionsForAddMissingMemberInJavaScriptFile(classDeclaration, makeStatic) {
+                var actions;
+                var methodCodeAction = getActionForMethodDeclaration(/*includeTypeScriptSyntax*/ false);
+                if (methodCodeAction) {
+                    actions = [methodCodeAction];
+                }
+                if (makeStatic) {
+                    if (classDeclaration.kind === 199 /* ClassExpression */) {
+                        return actions;
+                    }
+                    var className = classDeclaration.name.getText();
+                    var staticInitialization = ts.createStatement(ts.createAssignment(ts.createPropertyAccess(ts.createIdentifier(className), tokenName), ts.createIdentifier("undefined")));
+                    var staticInitializationChangeTracker = ts.textChanges.ChangeTracker.fromCodeFixContext(context);
+                    staticInitializationChangeTracker.insertNodeAfter(classDeclarationSourceFile, classDeclaration, staticInitialization, { suffix: context.newLineCharacter });
+                    var initializeStaticAction = {
+                        description: ts.formatStringFromArgs(ts.getLocaleSpecificMessage(ts.Diagnostics.Initialize_static_property_0), [tokenName]),
+                        changes: staticInitializationChangeTracker.getChanges()
+                    };
+                    (actions || (actions = [])).push(initializeStaticAction);
+                    return actions;
                 }
                 else {
-                    var tokenStart = sourceFile.getLineAndCharacterOfPosition(pos);
-                    var startLinePosition = ts.getStartPositionOfLine(tokenStart.line, sourceFile);
-                    if (indentation !== tokenStart.character || indentationIsDifferent(indentationString, startLinePosition)) {
-                        recordReplace(startLinePosition, tokenStart.character, indentationString);
-                    }
+                    var classConstructor = ts.getFirstConstructorWithBody(classDeclaration);
+                    if (!classConstructor) {
+                        return actions;
+                    }
+                    var propertyInitialization = ts.createStatement(ts.createAssignment(ts.createPropertyAccess(ts.createThis(), tokenName), ts.createIdentifier("undefined")));
+                    var propertyInitializationChangeTracker = ts.textChanges.ChangeTracker.fromCodeFixContext(context);
+                    propertyInitializationChangeTracker.insertNodeAt(classDeclarationSourceFile, classConstructor.body.getEnd() - 1, propertyInitialization, { prefix: context.newLineCharacter, suffix: context.newLineCharacter });
+                    var initializeAction = {
+                        description: ts.formatStringFromArgs(ts.getLocaleSpecificMessage(ts.Diagnostics.Initialize_property_0_in_the_constructor), [tokenName]),
+                        changes: propertyInitializationChangeTracker.getChanges()
+                    };
+                    (actions || (actions = [])).push(initializeAction);
+                    return actions;
+                }
+            }
+            function getActionsForAddMissingMemberInTypeScriptFile(classDeclaration, makeStatic) {
+                var actions;
+                var methodCodeAction = getActionForMethodDeclaration(/*includeTypeScriptSyntax*/ true);
+                if (methodCodeAction) {
+                    actions = [methodCodeAction];
+                }
+                var typeNode;
+                if (token.parent.parent.kind === 194 /* BinaryExpression */) {
+                    var binaryExpression = token.parent.parent;
+                    var otherExpression = token.parent === binaryExpression.left ? binaryExpression.right : binaryExpression.left;
+                    var checker = context.program.getTypeChecker();
+                    var widenedType = checker.getWidenedType(checker.getBaseTypeOfLiteralType(checker.getTypeAtLocation(otherExpression)));
+                    typeNode = checker.typeToTypeNode(widenedType, classDeclaration);
+                }
+                typeNode = typeNode || ts.createKeywordTypeNode(119 /* AnyKeyword */);
+                var property = ts.createProperty(
+                /*decorators*/ undefined, 
+                /*modifiers*/ makeStatic ? [ts.createToken(115 /* StaticKeyword */)] : undefined, tokenName, 
+                /*questionToken*/ undefined, typeNode, 
+                /*initializer*/ undefined);
+                var propertyChangeTracker = ts.textChanges.ChangeTracker.fromCodeFixContext(context);
+                propertyChangeTracker.insertNodeAfter(classDeclarationSourceFile, classOpenBrace, property, { suffix: context.newLineCharacter });
+                (actions || (actions = [])).push({
+                    description: ts.formatStringFromArgs(ts.getLocaleSpecificMessage(ts.Diagnostics.Declare_property_0), [tokenName]),
+                    changes: propertyChangeTracker.getChanges()
+                });
+                if (!makeStatic) {
+                    // Index signatures cannot have the static modifier.
+                    var stringTypeNode = ts.createKeywordTypeNode(136 /* StringKeyword */);
+                    var indexingParameter = ts.createParameter(
+                    /*decorators*/ undefined, 
+                    /*modifiers*/ undefined, 
+                    /*dotDotDotToken*/ undefined, "x", 
+                    /*questionToken*/ undefined, stringTypeNode, 
+                    /*initializer*/ undefined);
+                    var indexSignature = ts.createIndexSignature(
+                    /*decorators*/ undefined, 
+                    /*modifiers*/ undefined, [indexingParameter], typeNode);
+                    var indexSignatureChangeTracker = ts.textChanges.ChangeTracker.fromCodeFixContext(context);
+                    indexSignatureChangeTracker.insertNodeAfter(classDeclarationSourceFile, classOpenBrace, indexSignature, { suffix: context.newLineCharacter });
+                    actions.push({
+                        description: ts.formatStringFromArgs(ts.getLocaleSpecificMessage(ts.Diagnostics.Add_index_signature_for_property_0), [tokenName]),
+                        changes: indexSignatureChangeTracker.getChanges()
+                    });
                 }
+                return actions;
             }
-            function indentationIsDifferent(indentationString, startLinePosition) {
-                return indentationString !== sourceFile.text.substr(startLinePosition, indentationString.length);
+            function getActionForMethodDeclaration(includeTypeScriptSyntax) {
+                if (token.parent.parent.kind === 181 /* CallExpression */) {
+                    var callExpression = token.parent.parent;
+                    var methodDeclaration = codefix.createMethodFromCallExpression(callExpression, tokenName, includeTypeScriptSyntax, makeStatic);
+                    var methodDeclarationChangeTracker = ts.textChanges.ChangeTracker.fromCodeFixContext(context);
+                    methodDeclarationChangeTracker.insertNodeAfter(classDeclarationSourceFile, classOpenBrace, methodDeclaration, { suffix: context.newLineCharacter });
+                    return {
+                        description: ts.formatStringFromArgs(ts.getLocaleSpecificMessage(makeStatic ?
+                            ts.Diagnostics.Declare_method_0 :
+                            ts.Diagnostics.Declare_static_method_0), [tokenName]),
+                        changes: methodDeclarationChangeTracker.getChanges()
+                    };
+                }
             }
-            function indentMultilineComment(commentRange, indentation, firstLineIsIndented) {
-                // split comment in lines
-                var startLine = sourceFile.getLineAndCharacterOfPosition(commentRange.pos).line;
-                var endLine = sourceFile.getLineAndCharacterOfPosition(commentRange.end).line;
-                var parts;
-                if (startLine === endLine) {
-                    if (!firstLineIsIndented) {
-                        // treat as single line comment
-                        insertIndentation(commentRange.pos, indentation, /*lineAdded*/ false);
-                    }
-                    return;
+        }
+    })(codefix = ts.codefix || (ts.codefix = {}));
+})(ts || (ts = {}));
+/* @internal */
+var ts;
+(function (ts) {
+    var codefix;
+    (function (codefix) {
+        codefix.registerCodeFix({
+            errorCodes: [ts.Diagnostics.Property_0_does_not_exist_on_type_1_Did_you_mean_2.code,
+                ts.Diagnostics.Cannot_find_name_0_Did_you_mean_1.code],
+            getCodeActions: getActionsForCorrectSpelling
+        });
+        function getActionsForCorrectSpelling(context) {
+            var sourceFile = context.sourceFile;
+            // This is the identifier of the misspelled word. eg:
+            // this.speling = 1;
+            //      ^^^^^^^
+            var node = ts.getTokenAtPosition(sourceFile, context.span.start, /*includeJsDocComment*/ false); // TODO: GH#15852
+            var checker = context.program.getTypeChecker();
+            var suggestion;
+            if (node.kind === 71 /* Identifier */ && ts.isPropertyAccessExpression(node.parent)) {
+                var containingType = checker.getTypeAtLocation(node.parent.expression);
+                suggestion = checker.getSuggestionForNonexistentProperty(node, containingType);
+            }
+            else {
+                var meaning = ts.getMeaningFromLocation(node);
+                suggestion = checker.getSuggestionForNonexistentSymbol(node, ts.getTextOfNode(node), convertSemanticMeaningToSymbolFlags(meaning));
+            }
+            if (suggestion) {
+                return [{
+                        description: ts.formatStringFromArgs(ts.getLocaleSpecificMessage(ts.Diagnostics.Change_spelling_to_0), [suggestion]),
+                        changes: [{
+                                fileName: sourceFile.fileName,
+                                textChanges: [{
+                                        span: { start: node.getStart(), length: node.getWidth() },
+                                        newText: suggestion
+                                    }],
+                            }],
+                    }];
+            }
+        }
+        function convertSemanticMeaningToSymbolFlags(meaning) {
+            var flags = 0;
+            if (meaning & 4 /* Namespace */) {
+                flags |= 1920 /* Namespace */;
+            }
+            if (meaning & 2 /* Type */) {
+                flags |= 793064 /* Type */;
+            }
+            if (meaning & 1 /* Value */) {
+                flags |= 107455 /* Value */;
+            }
+            return flags;
+        }
+    })(codefix = ts.codefix || (ts.codefix = {}));
+})(ts || (ts = {}));
+/* @internal */
+var ts;
+(function (ts) {
+    var codefix;
+    (function (codefix) {
+        codefix.registerCodeFix({
+            errorCodes: [ts.Diagnostics.Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2.code],
+            getCodeActions: getActionForClassLikeMissingAbstractMember
+        });
+        codefix.registerCodeFix({
+            errorCodes: [ts.Diagnostics.Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1.code],
+            getCodeActions: getActionForClassLikeMissingAbstractMember
+        });
+        function getActionForClassLikeMissingAbstractMember(context) {
+            var sourceFile = context.sourceFile;
+            var start = context.span.start;
+            // This is the identifier in the case of a class declaration
+            // or the class keyword token in the case of a class expression.
+            var token = ts.getTokenAtPosition(sourceFile, start, /*includeJsDocComment*/ false);
+            var checker = context.program.getTypeChecker();
+            if (ts.isClassLike(token.parent)) {
+                var classDeclaration = token.parent;
+                var extendsNode = ts.getClassExtendsHeritageClauseElement(classDeclaration);
+                var instantiatedExtendsType = checker.getTypeAtLocation(extendsNode);
+                // Note that this is ultimately derived from a map indexed by symbol names,
+                // so duplicates cannot occur.
+                var extendsSymbols = checker.getPropertiesOfType(instantiatedExtendsType);
+                var abstractAndNonPrivateExtendsSymbols = extendsSymbols.filter(symbolPointsToNonPrivateAndAbstractMember);
+                var newNodes = codefix.createMissingMemberNodes(classDeclaration, abstractAndNonPrivateExtendsSymbols, checker);
+                var changes = codefix.newNodesToChanges(newNodes, ts.getOpenBraceOfClassLike(classDeclaration, sourceFile), context);
+                if (changes && changes.length > 0) {
+                    return [{
+                            description: ts.getLocaleSpecificMessage(ts.Diagnostics.Implement_inherited_abstract_class),
+                            changes: changes
+                        }];
                 }
-                else {
-                    parts = [];
-                    var startPos = commentRange.pos;
-                    for (var line = startLine; line < endLine; line++) {
-                        var endOfLine = ts.getEndLinePosition(line, sourceFile);
-                        parts.push({ pos: startPos, end: endOfLine });
-                        startPos = ts.getStartPositionOfLine(line + 1, sourceFile);
-                    }
-                    parts.push({ pos: startPos, end: commentRange.end });
+            }
+            return undefined;
+        }
+        function symbolPointsToNonPrivateAndAbstractMember(symbol) {
+            var decls = symbol.getDeclarations();
+            ts.Debug.assert(!!(decls && decls.length > 0));
+            var flags = ts.getModifierFlags(decls[0]);
+            return !(flags & 8 /* Private */) && !!(flags & 128 /* Abstract */);
+        }
+    })(codefix = ts.codefix || (ts.codefix = {}));
+})(ts || (ts = {}));
+/* @internal */
+var ts;
+(function (ts) {
+    var codefix;
+    (function (codefix) {
+        codefix.registerCodeFix({
+            errorCodes: [ts.Diagnostics.super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class.code],
+            getCodeActions: function (context) {
+                var sourceFile = context.sourceFile;
+                var token = ts.getTokenAtPosition(sourceFile, context.span.start, /*includeJsDocComment*/ false);
+                if (token.kind !== 99 /* ThisKeyword */) {
+                    return undefined;
                 }
-                var startLinePos = ts.getStartPositionOfLine(startLine, sourceFile);
-                var nonWhitespaceColumnInFirstPart = formatting.SmartIndenter.findFirstNonWhitespaceCharacterAndColumn(startLinePos, parts[0].pos, sourceFile, options);
-                if (indentation === nonWhitespaceColumnInFirstPart.column) {
-                    return;
+                var constructor = ts.getContainingFunction(token);
+                var superCall = findSuperCall(constructor.body);
+                if (!superCall) {
+                    return undefined;
                 }
-                var startIndex = 0;
-                if (firstLineIsIndented) {
-                    startIndex = 1;
-                    startLine++;
+                // figure out if the `this` access is actually inside the supercall
+                // i.e. super(this.a), since in that case we won't suggest a fix
+                if (superCall.expression && superCall.expression.kind === 181 /* CallExpression */) {
+                    var arguments_1 = superCall.expression.arguments;
+                    for (var i = 0; i < arguments_1.length; i++) {
+                        if (arguments_1[i].expression === token) {
+                            return undefined;
+                        }
+                    }
                 }
-                // shift all parts on the delta size
-                var delta = indentation - nonWhitespaceColumnInFirstPart.column;
-                for (var i = startIndex, len = parts.length; i < len; i++, startLine++) {
-                    var startLinePos_1 = ts.getStartPositionOfLine(startLine, sourceFile);
-                    var nonWhitespaceCharacterAndColumn = i === 0
-                        ? nonWhitespaceColumnInFirstPart
-                        : formatting.SmartIndenter.findFirstNonWhitespaceCharacterAndColumn(parts[i].pos, parts[i].end, sourceFile, options);
-                    var newIndentation = nonWhitespaceCharacterAndColumn.column + delta;
-                    if (newIndentation > 0) {
-                        var indentationString = getIndentationString(newIndentation, options);
-                        recordReplace(startLinePos_1, nonWhitespaceCharacterAndColumn.character, indentationString);
+                var changeTracker = ts.textChanges.ChangeTracker.fromCodeFixContext(context);
+                changeTracker.insertNodeAfter(sourceFile, ts.getOpenBrace(constructor, sourceFile), superCall, { suffix: context.newLineCharacter });
+                changeTracker.deleteNode(sourceFile, superCall);
+                return [{
+                        description: ts.getLocaleSpecificMessage(ts.Diagnostics.Make_super_call_the_first_statement_in_the_constructor),
+                        changes: changeTracker.getChanges()
+                    }];
+                function findSuperCall(n) {
+                    if (n.kind === 210 /* ExpressionStatement */ && ts.isSuperCall(n.expression)) {
+                        return n;
                     }
-                    else {
-                        recordDelete(startLinePos_1, nonWhitespaceCharacterAndColumn.character);
+                    if (ts.isFunctionLike(n)) {
+                        return undefined;
                     }
+                    return ts.forEachChild(n, findSuperCall);
                 }
             }
-            function trimTrailingWhitespacesForLines(line1, line2, range) {
-                for (var line = line1; line < line2; line++) {
-                    var lineStartPosition = ts.getStartPositionOfLine(line, sourceFile);
-                    var lineEndPosition = ts.getEndLinePosition(line, sourceFile);
-                    // do not trim whitespaces in comments or template expression
-                    if (range && (ts.isComment(range.kind) || ts.isStringOrRegularExpressionOrTemplateLiteral(range.kind)) && range.pos <= lineEndPosition && range.end > lineEndPosition) {
-                        continue;
-                    }
-                    var whitespaceStart = getTrailingWhitespaceStartPosition(lineStartPosition, lineEndPosition);
-                    if (whitespaceStart !== -1) {
-                        ts.Debug.assert(whitespaceStart === lineStartPosition || !ts.isWhiteSpaceSingleLine(sourceFile.text.charCodeAt(whitespaceStart - 1)));
-                        recordDelete(whitespaceStart, lineEndPosition + 1 - whitespaceStart);
-                    }
+        });
+    })(codefix = ts.codefix || (ts.codefix = {}));
+})(ts || (ts = {}));
+/* @internal */
+var ts;
+(function (ts) {
+    var codefix;
+    (function (codefix) {
+        codefix.registerCodeFix({
+            errorCodes: [ts.Diagnostics.Constructors_for_derived_classes_must_contain_a_super_call.code],
+            getCodeActions: function (context) {
+                var sourceFile = context.sourceFile;
+                var token = ts.getTokenAtPosition(sourceFile, context.span.start, /*includeJsDocComment*/ false);
+                if (token.kind !== 123 /* ConstructorKeyword */) {
+                    return undefined;
                 }
+                var changeTracker = ts.textChanges.ChangeTracker.fromCodeFixContext(context);
+                var superCall = ts.createStatement(ts.createCall(ts.createSuper(), /*typeArguments*/ undefined, /*argumentsArray*/ ts.emptyArray));
+                changeTracker.insertNodeAfter(sourceFile, ts.getOpenBrace(token.parent, sourceFile), superCall, { suffix: context.newLineCharacter });
+                return [{
+                        description: ts.getLocaleSpecificMessage(ts.Diagnostics.Add_missing_super_call),
+                        changes: changeTracker.getChanges()
+                    }];
             }
-            /**
-             * @param start The position of the first character in range
-             * @param end The position of the last character in range
-             */
-            function getTrailingWhitespaceStartPosition(start, end) {
-                var pos = end;
-                while (pos >= start && ts.isWhiteSpaceSingleLine(sourceFile.text.charCodeAt(pos))) {
-                    pos--;
+        });
+    })(codefix = ts.codefix || (ts.codefix = {}));
+})(ts || (ts = {}));
+/* @internal */
+var ts;
+(function (ts) {
+    var codefix;
+    (function (codefix) {
+        codefix.registerCodeFix({
+            errorCodes: [ts.Diagnostics.Cannot_extend_an_interface_0_Did_you_mean_implements.code],
+            getCodeActions: function (context) {
+                var sourceFile = context.sourceFile;
+                var start = context.span.start;
+                var token = ts.getTokenAtPosition(sourceFile, start, /*includeJsDocComment*/ false);
+                var classDeclNode = ts.getContainingClass(token);
+                if (!(token.kind === 71 /* Identifier */ && ts.isClassLike(classDeclNode))) {
+                    return undefined;
                 }
-                if (pos !== end) {
-                    return pos + 1;
+                var heritageClauses = classDeclNode.heritageClauses;
+                if (!(heritageClauses && heritageClauses.length > 0)) {
+                    return undefined;
                 }
-                return -1;
-            }
-            /**
-             * Trimming will be done for lines after the previous range
-             */
-            function trimTrailingWhitespacesForRemainingRange() {
-                var startPosition = previousRange ? previousRange.end : originalRange.pos;
-                var startLine = sourceFile.getLineAndCharacterOfPosition(startPosition).line;
-                var endLine = sourceFile.getLineAndCharacterOfPosition(originalRange.end).line;
-                trimTrailingWhitespacesForLines(startLine, endLine + 1, previousRange);
-            }
-            function newTextChange(start, len, newText) {
-                return { span: ts.createTextSpan(start, len), newText: newText };
-            }
-            function recordDelete(start, len) {
-                if (len) {
-                    edits.push(newTextChange(start, len, ""));
+                var extendsToken = heritageClauses[0].getFirstToken();
+                if (!(extendsToken && extendsToken.kind === 85 /* ExtendsKeyword */)) {
+                    return undefined;
                 }
-            }
-            function recordReplace(start, len, newText) {
-                if (len || newText) {
-                    edits.push(newTextChange(start, len, newText));
+                var changeTracker = ts.textChanges.ChangeTracker.fromCodeFixContext(context);
+                changeTracker.replaceNode(sourceFile, extendsToken, ts.createToken(108 /* ImplementsKeyword */));
+                // We replace existing keywords with commas.
+                for (var i = 1; i < heritageClauses.length; i++) {
+                    var keywordToken = heritageClauses[i].getFirstToken();
+                    if (keywordToken) {
+                        changeTracker.replaceNode(sourceFile, keywordToken, ts.createToken(26 /* CommaToken */));
+                    }
                 }
+                var result = [{
+                        description: ts.getLocaleSpecificMessage(ts.Diagnostics.Change_extends_to_implements),
+                        changes: changeTracker.getChanges()
+                    }];
+                return result;
             }
-            function applyRuleEdits(rule, previousRange, previousStartLine, currentRange, currentStartLine) {
-                switch (rule.Operation.Action) {
-                    case 1 /* Ignore */:
-                        // no action required
-                        return;
-                    case 8 /* Delete */:
-                        if (previousRange.end !== currentRange.pos) {
-                            // delete characters starting from t1.end up to t2.pos exclusive
-                            recordDelete(previousRange.end, currentRange.pos - previousRange.end);
-                        }
-                        break;
-                    case 4 /* NewLine */:
-                        // exit early if we on different lines and rule cannot change number of newlines
-                        // if line1 and line2 are on subsequent lines then no edits are required - ok to exit
-                        // if line1 and line2 are separated with more than one newline - ok to exit since we cannot delete extra new lines
-                        if (rule.Flag !== 1 /* CanDeleteNewLines */ && previousStartLine !== currentStartLine) {
-                            return;
-                        }
-                        // edit should not be applied only if we have one line feed between elements
-                        var lineDelta = currentStartLine - previousStartLine;
-                        if (lineDelta !== 1) {
-                            recordReplace(previousRange.end, currentRange.pos - previousRange.end, options.newLineCharacter);
-                        }
-                        break;
-                    case 2 /* Space */:
-                        // exit early if we on different lines and rule cannot change number of newlines
-                        if (rule.Flag !== 1 /* CanDeleteNewLines */ && previousStartLine !== currentStartLine) {
-                            return;
-                        }
-                        var posDelta = currentRange.pos - previousRange.end;
-                        if (posDelta !== 1 || sourceFile.text.charCodeAt(previousRange.end) !== 32 /* space */) {
-                            recordReplace(previousRange.end, currentRange.pos - previousRange.end, " ");
-                        }
-                        break;
+        });
+    })(codefix = ts.codefix || (ts.codefix = {}));
+})(ts || (ts = {}));
+/* @internal */
+var ts;
+(function (ts) {
+    var codefix;
+    (function (codefix) {
+        codefix.registerCodeFix({
+            errorCodes: [ts.Diagnostics.Cannot_find_name_0_Did_you_mean_the_instance_member_this_0.code],
+            getCodeActions: function (context) {
+                var sourceFile = context.sourceFile;
+                var token = ts.getTokenAtPosition(sourceFile, context.span.start, /*includeJsDocComment*/ false);
+                if (token.kind !== 71 /* Identifier */) {
+                    return undefined;
                 }
+                var changeTracker = ts.textChanges.ChangeTracker.fromCodeFixContext(context);
+                changeTracker.replaceNode(sourceFile, token, ts.createPropertyAccess(ts.createThis(), token));
+                return [{
+                        description: ts.getLocaleSpecificMessage(ts.Diagnostics.Add_this_to_unresolved_variable),
+                        changes: changeTracker.getChanges()
+                    }];
             }
-        }
-        function getOpenTokenForList(node, list) {
-            switch (node.kind) {
-                case 148 /* Constructor */:
-                case 220 /* FunctionDeclaration */:
-                case 179 /* FunctionExpression */:
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                case 180 /* ArrowFunction */:
-                    if (node.typeParameters === list) {
-                        return 25 /* LessThanToken */;
-                    }
-                    else if (node.parameters === list) {
-                        return 17 /* OpenParenToken */;
+        });
+    })(codefix = ts.codefix || (ts.codefix = {}));
+})(ts || (ts = {}));
+/* @internal */
+var ts;
+(function (ts) {
+    var codefix;
+    (function (codefix) {
+        codefix.registerCodeFix({
+            errorCodes: [
+                ts.Diagnostics._0_is_declared_but_never_used.code,
+                ts.Diagnostics.Property_0_is_declared_but_never_used.code
+            ],
+            getCodeActions: function (context) {
+                var sourceFile = context.sourceFile;
+                var start = context.span.start;
+                var token = ts.getTokenAtPosition(sourceFile, start, /*includeJsDocComment*/ false);
+                // this handles var ["computed"] = 12;
+                if (token.kind === 21 /* OpenBracketToken */) {
+                    token = ts.getTokenAtPosition(sourceFile, start + 1, /*includeJsDocComment*/ false);
+                }
+                switch (token.kind) {
+                    case 71 /* Identifier */:
+                        return deleteIdentifierOrPrefixWithUnderscore(token);
+                    case 149 /* PropertyDeclaration */:
+                    case 240 /* NamespaceImport */:
+                        return [deleteNode(token.parent)];
+                    default:
+                        return [deleteDefault()];
+                }
+                function deleteDefault() {
+                    if (ts.isDeclarationName(token)) {
+                        return deleteNode(token.parent);
                     }
-                    break;
-                case 174 /* CallExpression */:
-                case 175 /* NewExpression */:
-                    if (node.typeArguments === list) {
-                        return 25 /* LessThanToken */;
+                    else if (ts.isLiteralComputedPropertyDeclarationName(token)) {
+                        return deleteNode(token.parent.parent);
                     }
-                    else if (node.arguments === list) {
-                        return 17 /* OpenParenToken */;
+                    else {
+                        return undefined;
                     }
-                    break;
-                case 155 /* TypeReference */:
-                    if (node.typeArguments === list) {
-                        return 25 /* LessThanToken */;
+                }
+                function prefixIdentifierWithUnderscore(identifier) {
+                    var startPosition = identifier.getStart(sourceFile, /*includeJsDocComment*/ false);
+                    return {
+                        description: ts.formatStringFromArgs(ts.getLocaleSpecificMessage(ts.Diagnostics.Prefix_0_with_an_underscore), { 0: token.getText() }),
+                        changes: [{
+                                fileName: sourceFile.path,
+                                textChanges: [{
+                                        span: { start: startPosition, length: 0 },
+                                        newText: "_"
+                                    }]
+                            }]
+                    };
+                }
+                function deleteIdentifierOrPrefixWithUnderscore(identifier) {
+                    var parent = identifier.parent;
+                    switch (parent.kind) {
+                        case 226 /* VariableDeclaration */:
+                            return deleteVariableDeclarationOrPrefixWithUnderscore(identifier, parent);
+                        case 145 /* TypeParameter */:
+                            var typeParameters = parent.parent.typeParameters;
+                            if (typeParameters.length === 1) {
+                                var previousToken = ts.getTokenAtPosition(sourceFile, typeParameters.pos - 1, /*includeJsDocComment*/ false);
+                                var nextToken = ts.getTokenAtPosition(sourceFile, typeParameters.end, /*includeJsDocComment*/ false);
+                                ts.Debug.assert(previousToken.kind === 27 /* LessThanToken */);
+                                ts.Debug.assert(nextToken.kind === 29 /* GreaterThanToken */);
+                                return [deleteNodeRange(previousToken, nextToken)];
+                            }
+                            else {
+                                return [deleteNodeInList(parent)];
+                            }
+                        case 146 /* Parameter */:
+                            var functionDeclaration = parent.parent;
+                            return [functionDeclaration.parameters.length === 1 ? deleteNode(parent) : deleteNodeInList(parent),
+                                prefixIdentifierWithUnderscore(identifier)];
+                        // handle case where 'import a = A;'
+                        case 237 /* ImportEqualsDeclaration */:
+                            var importEquals = ts.getAncestor(identifier, 237 /* ImportEqualsDeclaration */);
+                            return [deleteNode(importEquals)];
+                        case 242 /* ImportSpecifier */:
+                            var namedImports = parent.parent;
+                            if (namedImports.elements.length === 1) {
+                                // Only 1 import and it is unused. So the entire declaration should be removed.
+                                var importSpec = ts.getAncestor(identifier, 238 /* ImportDeclaration */);
+                                return [deleteNode(importSpec)];
+                            }
+                            else {
+                                // delete import specifier
+                                return [deleteNodeInList(parent)];
+                            }
+                        // handle case where "import d, * as ns from './file'"
+                        // or "'import {a, b as ns} from './file'"
+                        case 239 /* ImportClause */:
+                            var importClause = parent;
+                            if (!importClause.namedBindings) {
+                                var importDecl = ts.getAncestor(importClause, 238 /* ImportDeclaration */);
+                                return [deleteNode(importDecl)];
+                            }
+                            else {
+                                // import |d,| * as ns from './file'
+                                var start_4 = importClause.name.getStart(sourceFile);
+                                var nextToken = ts.getTokenAtPosition(sourceFile, importClause.name.end, /*includeJsDocComment*/ false);
+                                if (nextToken && nextToken.kind === 26 /* CommaToken */) {
+                                    // shift first non-whitespace position after comma to the start position of the node
+                                    return [deleteRange({ pos: start_4, end: ts.skipTrivia(sourceFile.text, nextToken.end, /*stopAfterLineBreaks*/ false, /*stopAtComments*/ true) })];
+                                }
+                                else {
+                                    return [deleteNode(importClause.name)];
+                                }
+                            }
+                        case 240 /* NamespaceImport */:
+                            var namespaceImport = parent;
+                            if (namespaceImport.name === identifier && !namespaceImport.parent.name) {
+                                var importDecl = ts.getAncestor(namespaceImport, 238 /* ImportDeclaration */);
+                                return [deleteNode(importDecl)];
+                            }
+                            else {
+                                var previousToken = ts.getTokenAtPosition(sourceFile, namespaceImport.pos - 1, /*includeJsDocComment*/ false);
+                                if (previousToken && previousToken.kind === 26 /* CommaToken */) {
+                                    var startPosition = ts.textChanges.getAdjustedStartPosition(sourceFile, previousToken, {}, ts.textChanges.Position.FullStart);
+                                    return [deleteRange({ pos: startPosition, end: namespaceImport.end })];
+                                }
+                                return [deleteRange(namespaceImport)];
+                            }
+                        default:
+                            return [deleteDefault()];
+                    }
+                }
+                // token.parent is a variableDeclaration
+                function deleteVariableDeclarationOrPrefixWithUnderscore(identifier, varDecl) {
+                    switch (varDecl.parent.parent.kind) {
+                        case 214 /* ForStatement */:
+                            var forStatement = varDecl.parent.parent;
+                            var forInitializer = forStatement.initializer;
+                            return [forInitializer.declarations.length === 1 ? deleteNode(forInitializer) : deleteNodeInList(varDecl)];
+                        case 216 /* ForOfStatement */:
+                            var forOfStatement = varDecl.parent.parent;
+                            ts.Debug.assert(forOfStatement.initializer.kind === 227 /* VariableDeclarationList */);
+                            var forOfInitializer = forOfStatement.initializer;
+                            return [
+                                replaceNode(forOfInitializer.declarations[0], ts.createObjectLiteral()),
+                                prefixIdentifierWithUnderscore(identifier)
+                            ];
+                        case 215 /* ForInStatement */:
+                            // There is no valid fix in the case of:
+                            //  for .. in
+                            return [prefixIdentifierWithUnderscore(identifier)];
+                        default:
+                            var variableStatement = varDecl.parent.parent;
+                            if (variableStatement.declarationList.declarations.length === 1) {
+                                return [deleteNode(variableStatement)];
+                            }
+                            else {
+                                return [deleteNodeInList(varDecl)];
+                            }
                     }
-            }
-            return 0 /* Unknown */;
-        }
-        function getCloseTokenForOpenToken(kind) {
-            switch (kind) {
-                case 17 /* OpenParenToken */:
-                    return 18 /* CloseParenToken */;
-                case 25 /* LessThanToken */:
-                    return 27 /* GreaterThanToken */;
-            }
-            return 0 /* Unknown */;
-        }
-        var internedSizes;
-        var internedTabsIndentation;
-        var internedSpacesIndentation;
-        function getIndentationString(indentation, options) {
-            // reset interned strings if FormatCodeOptions were changed
-            var resetInternedStrings = !internedSizes || (internedSizes.tabSize !== options.tabSize || internedSizes.indentSize !== options.indentSize);
-            if (resetInternedStrings) {
-                internedSizes = { tabSize: options.tabSize, indentSize: options.indentSize };
-                internedTabsIndentation = internedSpacesIndentation = undefined;
-            }
-            if (!options.convertTabsToSpaces) {
-                var tabs = Math.floor(indentation / options.tabSize);
-                var spaces = indentation - tabs * options.tabSize;
-                var tabString = void 0;
-                if (!internedTabsIndentation) {
-                    internedTabsIndentation = [];
                 }
-                if (internedTabsIndentation[tabs] === undefined) {
-                    internedTabsIndentation[tabs] = tabString = repeat("\t", tabs);
+                function deleteNode(n) {
+                    return makeChange(ts.textChanges.ChangeTracker.fromCodeFixContext(context).deleteNode(sourceFile, n));
                 }
-                else {
-                    tabString = internedTabsIndentation[tabs];
+                function deleteRange(range) {
+                    return makeChange(ts.textChanges.ChangeTracker.fromCodeFixContext(context).deleteRange(sourceFile, range));
                 }
-                return spaces ? tabString + repeat(" ", spaces) : tabString;
-            }
-            else {
-                var spacesString = void 0;
-                var quotient = Math.floor(indentation / options.indentSize);
-                var remainder = indentation % options.indentSize;
-                if (!internedSpacesIndentation) {
-                    internedSpacesIndentation = [];
+                function deleteNodeInList(n) {
+                    return makeChange(ts.textChanges.ChangeTracker.fromCodeFixContext(context).deleteNodeInList(sourceFile, n));
                 }
-                if (internedSpacesIndentation[quotient] === undefined) {
-                    spacesString = repeat(" ", options.indentSize * quotient);
-                    internedSpacesIndentation[quotient] = spacesString;
+                function deleteNodeRange(start, end) {
+                    return makeChange(ts.textChanges.ChangeTracker.fromCodeFixContext(context).deleteNodeRange(sourceFile, start, end));
                 }
-                else {
-                    spacesString = internedSpacesIndentation[quotient];
+                function replaceNode(n, newNode) {
+                    return makeChange(ts.textChanges.ChangeTracker.fromCodeFixContext(context).replaceNode(sourceFile, n, newNode));
                 }
-                return remainder ? spacesString + repeat(" ", remainder) : spacesString;
-            }
-            function repeat(value, count) {
-                var s = "";
-                for (var i = 0; i < count; i++) {
-                    s += value;
+                function makeChange(changeTracker) {
+                    return {
+                        description: ts.formatStringFromArgs(ts.getLocaleSpecificMessage(ts.Diagnostics.Remove_declaration_for_Colon_0), { 0: token.getText() }),
+                        changes: changeTracker.getChanges()
+                    };
                 }
-                return s;
             }
-        }
-        formatting.getIndentationString = getIndentationString;
-    })(formatting = ts.formatting || (ts.formatting = {}));
+        });
+    })(codefix = ts.codefix || (ts.codefix = {}));
 })(ts || (ts = {}));
-///<reference path='..\services.ts' />
 /* @internal */
 var ts;
 (function (ts) {
-    var formatting;
-    (function (formatting) {
-        var SmartIndenter;
-        (function (SmartIndenter) {
-            var Value;
-            (function (Value) {
-                Value[Value["Unknown"] = -1] = "Unknown";
-            })(Value || (Value = {}));
-            function getIndentation(position, sourceFile, options) {
-                if (position > sourceFile.text.length) {
-                    return getBaseIndentation(options); // past EOF
-                }
-                // no indentation when the indent style is set to none,
-                // so we can return fast
-                if (options.indentStyle === ts.IndentStyle.None) {
-                    return 0;
+    var codefix;
+    (function (codefix) {
+        codefix.registerCodeFix({
+            errorCodes: [
+                ts.Diagnostics.Cannot_find_name_0.code,
+                ts.Diagnostics.Cannot_find_name_0_Did_you_mean_1.code,
+                ts.Diagnostics.Cannot_find_namespace_0.code,
+                ts.Diagnostics._0_refers_to_a_UMD_global_but_the_current_file_is_a_module_Consider_adding_an_import_instead.code
+            ],
+            getCodeActions: getImportCodeActions
+        });
+        var ModuleSpecifierComparison;
+        (function (ModuleSpecifierComparison) {
+            ModuleSpecifierComparison[ModuleSpecifierComparison["Better"] = 0] = "Better";
+            ModuleSpecifierComparison[ModuleSpecifierComparison["Equal"] = 1] = "Equal";
+            ModuleSpecifierComparison[ModuleSpecifierComparison["Worse"] = 2] = "Worse";
+        })(ModuleSpecifierComparison || (ModuleSpecifierComparison = {}));
+        var ImportCodeActionMap = (function () {
+            function ImportCodeActionMap() {
+                this.symbolIdToActionMap = [];
+            }
+            ImportCodeActionMap.prototype.addAction = function (symbolId, newAction) {
+                if (!newAction) {
+                    return;
                 }
-                var precedingToken = ts.findPrecedingToken(position, sourceFile);
-                if (!precedingToken) {
-                    return getBaseIndentation(options);
+                var actions = this.symbolIdToActionMap[symbolId];
+                if (!actions) {
+                    this.symbolIdToActionMap[symbolId] = [newAction];
+                    return;
                 }
-                // no indentation in string \regex\template literals
-                var precedingTokenIsLiteral = ts.isStringOrRegularExpressionOrTemplateLiteral(precedingToken.kind);
-                if (precedingTokenIsLiteral && precedingToken.getStart(sourceFile) <= position && precedingToken.end > position) {
-                    return 0;
+                if (newAction.kind === "CodeChange") {
+                    actions.push(newAction);
+                    return;
                 }
-                var lineAtPosition = sourceFile.getLineAndCharacterOfPosition(position).line;
-                // indentation is first non-whitespace character in a previous line
-                // for block indentation, we should look for a line which contains something that's not
-                // whitespace.
-                if (options.indentStyle === ts.IndentStyle.Block) {
-                    // move backwards until we find a line with a non-whitespace character,
-                    // then find the first non-whitespace character for that line.
-                    var current_1 = position;
-                    while (current_1 > 0) {
-                        var char = sourceFile.text.charCodeAt(current_1);
-                        if (!ts.isWhiteSpace(char)) {
+                var updatedNewImports = [];
+                for (var _i = 0, _a = this.symbolIdToActionMap[symbolId]; _i < _a.length; _i++) {
+                    var existingAction = _a[_i];
+                    if (existingAction.kind === "CodeChange") {
+                        // only import actions should compare
+                        updatedNewImports.push(existingAction);
+                        continue;
+                    }
+                    switch (this.compareModuleSpecifiers(existingAction.moduleSpecifier, newAction.moduleSpecifier)) {
+                        case ModuleSpecifierComparison.Better:
+                            // the new one is not worth considering if it is a new import.
+                            // However if it is instead a insertion into existing import, the user might want to use
+                            // the module specifier even it is worse by our standards. So keep it.
+                            if (newAction.kind === "NewImport") {
+                                return;
+                            }
+                        // falls through
+                        case ModuleSpecifierComparison.Equal:
+                            // the current one is safe. But it is still possible that the new one is worse
+                            // than another existing one. For example, you may have new imports from "./foo/bar"
+                            // and "bar", when the new one is "bar/bar2" and the current one is "./foo/bar". The new
+                            // one and the current one are not comparable (one relative path and one absolute path),
+                            // but the new one is worse than the other one, so should not add to the list.
+                            updatedNewImports.push(existingAction);
                             break;
+                        case ModuleSpecifierComparison.Worse:
+                            // the existing one is worse, remove from the list.
+                            continue;
+                    }
+                }
+                // if we reach here, it means the new one is better or equal to all of the existing ones.
+                updatedNewImports.push(newAction);
+                this.symbolIdToActionMap[symbolId] = updatedNewImports;
+            };
+            ImportCodeActionMap.prototype.addActions = function (symbolId, newActions) {
+                for (var _i = 0, newActions_1 = newActions; _i < newActions_1.length; _i++) {
+                    var newAction = newActions_1[_i];
+                    this.addAction(symbolId, newAction);
+                }
+            };
+            ImportCodeActionMap.prototype.getAllActions = function () {
+                var result = [];
+                for (var key in this.symbolIdToActionMap) {
+                    result = ts.concatenate(result, this.symbolIdToActionMap[key]);
+                }
+                return result;
+            };
+            ImportCodeActionMap.prototype.compareModuleSpecifiers = function (moduleSpecifier1, moduleSpecifier2) {
+                if (moduleSpecifier1 === moduleSpecifier2) {
+                    return ModuleSpecifierComparison.Equal;
+                }
+                // if moduleSpecifier1 (ms1) is a substring of ms2, then it is better
+                if (moduleSpecifier2.indexOf(moduleSpecifier1) === 0) {
+                    return ModuleSpecifierComparison.Better;
+                }
+                if (moduleSpecifier1.indexOf(moduleSpecifier2) === 0) {
+                    return ModuleSpecifierComparison.Worse;
+                }
+                // if both are relative paths, and ms1 has fewer levels, then it is better
+                if (ts.isExternalModuleNameRelative(moduleSpecifier1) && ts.isExternalModuleNameRelative(moduleSpecifier2)) {
+                    var regex = new RegExp(ts.directorySeparator, "g");
+                    var moduleSpecifier1LevelCount = (moduleSpecifier1.match(regex) || []).length;
+                    var moduleSpecifier2LevelCount = (moduleSpecifier2.match(regex) || []).length;
+                    return moduleSpecifier1LevelCount < moduleSpecifier2LevelCount
+                        ? ModuleSpecifierComparison.Better
+                        : moduleSpecifier1LevelCount === moduleSpecifier2LevelCount
+                            ? ModuleSpecifierComparison.Equal
+                            : ModuleSpecifierComparison.Worse;
+                }
+                // the equal cases include when the two specifiers are not comparable.
+                return ModuleSpecifierComparison.Equal;
+            };
+            return ImportCodeActionMap;
+        }());
+        function getImportCodeActions(context) {
+            var sourceFile = context.sourceFile;
+            var checker = context.program.getTypeChecker();
+            var allSourceFiles = context.program.getSourceFiles();
+            var useCaseSensitiveFileNames = context.host.useCaseSensitiveFileNames ? context.host.useCaseSensitiveFileNames() : false;
+            var token = ts.getTokenAtPosition(sourceFile, context.span.start, /*includeJsDocComment*/ false);
+            var name = token.getText();
+            var symbolIdActionMap = new ImportCodeActionMap();
+            // this is a module id -> module import declaration map
+            var cachedImportDeclarations = [];
+            var lastImportDeclaration;
+            var currentTokenMeaning = ts.getMeaningFromLocation(token);
+            if (context.errorCode === ts.Diagnostics._0_refers_to_a_UMD_global_but_the_current_file_is_a_module_Consider_adding_an_import_instead.code) {
+                var umdSymbol = checker.getSymbolAtLocation(token);
+                var symbol = void 0;
+                var symbolName = void 0;
+                if (umdSymbol.flags & 8388608 /* Alias */) {
+                    symbol = checker.getAliasedSymbol(umdSymbol);
+                    symbolName = name;
+                }
+                else if (ts.isJsxOpeningLikeElement(token.parent) && token.parent.tagName === token) {
+                    // The error wasn't for the symbolAtLocation, it was for the JSX tag itself, which needs access to e.g. `React`.
+                    symbol = checker.getAliasedSymbol(checker.resolveNameAtLocation(token, checker.getJsxNamespace(), 107455 /* Value */));
+                    symbolName = symbol.name;
+                }
+                else {
+                    ts.Debug.fail("Either the symbol or the JSX namespace should be a UMD global if we got here");
+                }
+                return getCodeActionForImport(symbol, symbolName, /*isDefault*/ false, /*isNamespaceImport*/ true);
+            }
+            var candidateModules = checker.getAmbientModules();
+            for (var _i = 0, allSourceFiles_1 = allSourceFiles; _i < allSourceFiles_1.length; _i++) {
+                var otherSourceFile = allSourceFiles_1[_i];
+                if (otherSourceFile !== sourceFile && ts.isExternalOrCommonJsModule(otherSourceFile)) {
+                    candidateModules.push(otherSourceFile.symbol);
+                }
+            }
+            for (var _a = 0, candidateModules_1 = candidateModules; _a < candidateModules_1.length; _a++) {
+                var moduleSymbol = candidateModules_1[_a];
+                context.cancellationToken.throwIfCancellationRequested();
+                // check the default export
+                var defaultExport = checker.tryGetMemberInModuleExports("default", moduleSymbol);
+                if (defaultExport) {
+                    var localSymbol = ts.getLocalSymbolForExportDefault(defaultExport);
+                    if (localSymbol && localSymbol.name === name && checkSymbolHasMeaning(localSymbol, currentTokenMeaning)) {
+                        // check if this symbol is already used
+                        var symbolId = getUniqueSymbolId(localSymbol);
+                        symbolIdActionMap.addActions(symbolId, getCodeActionForImport(moduleSymbol, name, /*isDefault*/ true));
+                    }
+                }
+                // check exports with the same name
+                var exportSymbolWithIdenticalName = checker.tryGetMemberInModuleExports(name, moduleSymbol);
+                if (exportSymbolWithIdenticalName && checkSymbolHasMeaning(exportSymbolWithIdenticalName, currentTokenMeaning)) {
+                    var symbolId = getUniqueSymbolId(exportSymbolWithIdenticalName);
+                    symbolIdActionMap.addActions(symbolId, getCodeActionForImport(moduleSymbol, name));
+                }
+            }
+            return symbolIdActionMap.getAllActions();
+            function getImportDeclarations(moduleSymbol) {
+                var moduleSymbolId = getUniqueSymbolId(moduleSymbol);
+                var cached = cachedImportDeclarations[moduleSymbolId];
+                if (cached) {
+                    return cached;
+                }
+                var existingDeclarations = [];
+                for (var _i = 0, _a = sourceFile.imports; _i < _a.length; _i++) {
+                    var importModuleSpecifier = _a[_i];
+                    var importSymbol = checker.getSymbolAtLocation(importModuleSpecifier);
+                    if (importSymbol === moduleSymbol) {
+                        existingDeclarations.push(getImportDeclaration(importModuleSpecifier));
+                    }
+                }
+                cachedImportDeclarations[moduleSymbolId] = existingDeclarations;
+                return existingDeclarations;
+                function getImportDeclaration(moduleSpecifier) {
+                    var node = moduleSpecifier;
+                    while (node) {
+                        if (node.kind === 238 /* ImportDeclaration */) {
+                            return node;
+                        }
+                        if (node.kind === 237 /* ImportEqualsDeclaration */) {
+                            return node;
+                        }
+                        node = node.parent;
+                    }
+                    return undefined;
+                }
+            }
+            function getUniqueSymbolId(symbol) {
+                if (symbol.flags & 8388608 /* Alias */) {
+                    return ts.getSymbolId(checker.getAliasedSymbol(symbol));
+                }
+                return ts.getSymbolId(symbol);
+            }
+            function checkSymbolHasMeaning(symbol, meaning) {
+                var declarations = symbol.getDeclarations();
+                return declarations ? ts.some(symbol.declarations, function (decl) { return !!(ts.getMeaningFromDeclaration(decl) & meaning); }) : false;
+            }
+            function getCodeActionForImport(moduleSymbol, symbolName, isDefault, isNamespaceImport) {
+                var existingDeclarations = getImportDeclarations(moduleSymbol);
+                if (existingDeclarations.length > 0) {
+                    // With an existing import statement, there are more than one actions the user can do.
+                    return getCodeActionsForExistingImport(existingDeclarations);
+                }
+                else {
+                    return [getCodeActionForNewImport()];
+                }
+                function getCodeActionsForExistingImport(declarations) {
+                    var actions = [];
+                    // It is possible that multiple import statements with the same specifier exist in the file.
+                    // e.g.
+                    //
+                    //     import * as ns from "foo";
+                    //     import { member1, member2 } from "foo";
+                    //
+                    //     member3/**/ <-- cusor here
+                    //
+                    // in this case we should provie 2 actions:
+                    //     1. change "member3" to "ns.member3"
+                    //     2. add "member3" to the second import statement's import list
+                    // and it is up to the user to decide which one fits best.
+                    var namespaceImportDeclaration;
+                    var namedImportDeclaration;
+                    var existingModuleSpecifier;
+                    for (var _i = 0, declarations_14 = declarations; _i < declarations_14.length; _i++) {
+                        var declaration = declarations_14[_i];
+                        if (declaration.kind === 238 /* ImportDeclaration */) {
+                            var namedBindings = declaration.importClause && declaration.importClause.namedBindings;
+                            if (namedBindings && namedBindings.kind === 240 /* NamespaceImport */) {
+                                // case:
+                                // import * as ns from "foo"
+                                namespaceImportDeclaration = declaration;
+                            }
+                            else {
+                                // cases:
+                                // import default from "foo"
+                                // import { bar } from "foo" or combination with the first one
+                                // import "foo"
+                                namedImportDeclaration = declaration;
+                            }
+                            existingModuleSpecifier = declaration.moduleSpecifier.getText();
+                        }
+                        else {
+                            // case:
+                            // import foo = require("foo")
+                            namespaceImportDeclaration = declaration;
+                            existingModuleSpecifier = getModuleSpecifierFromImportEqualsDeclaration(declaration);
+                        }
+                    }
+                    if (namespaceImportDeclaration) {
+                        actions.push(getCodeActionForNamespaceImport(namespaceImportDeclaration));
+                    }
+                    if (!isNamespaceImport && namedImportDeclaration && namedImportDeclaration.importClause &&
+                        (namedImportDeclaration.importClause.name || namedImportDeclaration.importClause.namedBindings)) {
+                        /**
+                         * If the existing import declaration already has a named import list, just
+                         * insert the identifier into that list.
+                         */
+                        var fileTextChanges = getTextChangeForImportClause(namedImportDeclaration.importClause);
+                        var moduleSpecifierWithoutQuotes = ts.stripQuotes(namedImportDeclaration.moduleSpecifier.getText());
+                        actions.push(createCodeAction(ts.Diagnostics.Add_0_to_existing_import_declaration_from_1, [name, moduleSpecifierWithoutQuotes], fileTextChanges, "InsertingIntoExistingImport", moduleSpecifierWithoutQuotes));
+                    }
+                    else {
+                        // we need to create a new import statement, but the existing module specifier can be reused.
+                        actions.push(getCodeActionForNewImport(existingModuleSpecifier));
+                    }
+                    return actions;
+                    function getModuleSpecifierFromImportEqualsDeclaration(declaration) {
+                        if (declaration.moduleReference && declaration.moduleReference.kind === 248 /* ExternalModuleReference */) {
+                            return declaration.moduleReference.expression.getText();
+                        }
+                        return declaration.moduleReference.getText();
+                    }
+                    function getTextChangeForImportClause(importClause) {
+                        var importList = importClause.namedBindings;
+                        var newImportSpecifier = ts.createImportSpecifier(/*propertyName*/ undefined, ts.createIdentifier(name));
+                        // case 1:
+                        // original text: import default from "module"
+                        // change to: import default, { name } from "module"
+                        // case 2:
+                        // original text: import {} from "module"
+                        // change to: import { name } from "module"
+                        if (!importList || importList.elements.length === 0) {
+                            var newImportClause = ts.createImportClause(importClause.name, ts.createNamedImports([newImportSpecifier]));
+                            return createChangeTracker().replaceNode(sourceFile, importClause, newImportClause).getChanges();
+                        }
+                        /**
+                         * If the import list has one import per line, preserve that. Otherwise, insert on same line as last element
+                         *     import {
+                         *         foo
+                         *     } from "./module";
+                         */
+                        return createChangeTracker().insertNodeInListAfter(sourceFile, importList.elements[importList.elements.length - 1], newImportSpecifier).getChanges();
+                    }
+                    function getCodeActionForNamespaceImport(declaration) {
+                        var namespacePrefix;
+                        if (declaration.kind === 238 /* ImportDeclaration */) {
+                            namespacePrefix = declaration.importClause.namedBindings.name.getText();
+                        }
+                        else {
+                            namespacePrefix = declaration.name.getText();
+                        }
+                        namespacePrefix = ts.stripQuotes(namespacePrefix);
+                        /**
+                         * Cases:
+                         *     import * as ns from "mod"
+                         *     import default, * as ns from "mod"
+                         *     import ns = require("mod")
+                         *
+                         * Because there is no import list, we alter the reference to include the
+                         * namespace instead of altering the import declaration. For example, "foo" would
+                         * become "ns.foo"
+                         */
+                        return createCodeAction(ts.Diagnostics.Change_0_to_1, [name, namespacePrefix + "." + name], createChangeTracker().replaceNode(sourceFile, token, ts.createPropertyAccess(ts.createIdentifier(namespacePrefix), name)).getChanges(), "CodeChange");
+                    }
+                }
+                function getCodeActionForNewImport(moduleSpecifier) {
+                    if (!lastImportDeclaration) {
+                        // insert after any existing imports
+                        for (var i = sourceFile.statements.length - 1; i >= 0; i--) {
+                            var statement = sourceFile.statements[i];
+                            if (statement.kind === 237 /* ImportEqualsDeclaration */ || statement.kind === 238 /* ImportDeclaration */) {
+                                lastImportDeclaration = statement;
+                                break;
+                            }
+                        }
+                    }
+                    var getCanonicalFileName = ts.createGetCanonicalFileName(useCaseSensitiveFileNames);
+                    var moduleSpecifierWithoutQuotes = ts.stripQuotes(moduleSpecifier || getModuleSpecifierForNewImport());
+                    var changeTracker = createChangeTracker();
+                    var importClause = isDefault
+                        ? ts.createImportClause(ts.createIdentifier(symbolName), /*namedBindings*/ undefined)
+                        : isNamespaceImport
+                            ? ts.createImportClause(/*name*/ undefined, ts.createNamespaceImport(ts.createIdentifier(symbolName)))
+                            : ts.createImportClause(/*name*/ undefined, ts.createNamedImports([ts.createImportSpecifier(/*propertyName*/ undefined, ts.createIdentifier(symbolName))]));
+                    var importDecl = ts.createImportDeclaration(/*decorators*/ undefined, /*modifiers*/ undefined, importClause, ts.createLiteral(moduleSpecifierWithoutQuotes));
+                    if (!lastImportDeclaration) {
+                        changeTracker.insertNodeAt(sourceFile, sourceFile.getStart(), importDecl, { suffix: "" + context.newLineCharacter + context.newLineCharacter });
+                    }
+                    else {
+                        changeTracker.insertNodeAfter(sourceFile, lastImportDeclaration, importDecl, { suffix: context.newLineCharacter });
+                    }
+                    // if this file doesn't have any import statements, insert an import statement and then insert a new line
+                    // between the only import statement and user code. Otherwise just insert the statement because chances
+                    // are there are already a new line seperating code and import statements.
+                    return createCodeAction(ts.Diagnostics.Import_0_from_1, [symbolName, "\"" + moduleSpecifierWithoutQuotes + "\""], changeTracker.getChanges(), "NewImport", moduleSpecifierWithoutQuotes);
+                    function getModuleSpecifierForNewImport() {
+                        var fileName = sourceFile.fileName;
+                        var moduleFileName = moduleSymbol.valueDeclaration.getSourceFile().fileName;
+                        var sourceDirectory = ts.getDirectoryPath(fileName);
+                        var options = context.program.getCompilerOptions();
+                        return tryGetModuleNameFromAmbientModule() ||
+                            tryGetModuleNameFromTypeRoots() ||
+                            tryGetModuleNameAsNodeModule() ||
+                            tryGetModuleNameFromBaseUrl() ||
+                            tryGetModuleNameFromRootDirs() ||
+                            ts.removeFileExtension(getRelativePath(moduleFileName, sourceDirectory));
+                        function tryGetModuleNameFromAmbientModule() {
+                            var decl = moduleSymbol.valueDeclaration;
+                            if (ts.isModuleDeclaration(decl) && ts.isStringLiteral(decl.name)) {
+                                return decl.name.text;
+                            }
+                        }
+                        function tryGetModuleNameFromBaseUrl() {
+                            if (!options.baseUrl) {
+                                return undefined;
+                            }
+                            var relativeName = getRelativePathIfInDirectory(moduleFileName, options.baseUrl);
+                            if (!relativeName) {
+                                return undefined;
+                            }
+                            var relativeNameWithIndex = ts.removeFileExtension(relativeName);
+                            relativeName = removeExtensionAndIndexPostFix(relativeName);
+                            if (options.paths) {
+                                for (var key in options.paths) {
+                                    for (var _i = 0, _a = options.paths[key]; _i < _a.length; _i++) {
+                                        var pattern = _a[_i];
+                                        var indexOfStar = pattern.indexOf("*");
+                                        if (indexOfStar === 0 && pattern.length === 1) {
+                                            continue;
+                                        }
+                                        else if (indexOfStar !== -1) {
+                                            var prefix = pattern.substr(0, indexOfStar);
+                                            var suffix = pattern.substr(indexOfStar + 1);
+                                            if (relativeName.length >= prefix.length + suffix.length &&
+                                                ts.startsWith(relativeName, prefix) &&
+                                                ts.endsWith(relativeName, suffix)) {
+                                                var matchedStar = relativeName.substr(prefix.length, relativeName.length - suffix.length);
+                                                return key.replace("\*", matchedStar);
+                                            }
+                                        }
+                                        else if (pattern === relativeName || pattern === relativeNameWithIndex) {
+                                            return key;
+                                        }
+                                    }
+                                }
+                            }
+                            return relativeName;
+                        }
+                        function tryGetModuleNameFromRootDirs() {
+                            if (options.rootDirs) {
+                                var normalizedTargetPath = getPathRelativeToRootDirs(moduleFileName, options.rootDirs);
+                                var normalizedSourcePath = getPathRelativeToRootDirs(sourceDirectory, options.rootDirs);
+                                if (normalizedTargetPath !== undefined) {
+                                    var relativePath = normalizedSourcePath !== undefined ? getRelativePath(normalizedTargetPath, normalizedSourcePath) : normalizedTargetPath;
+                                    return ts.removeFileExtension(relativePath);
+                                }
+                            }
+                            return undefined;
+                        }
+                        function tryGetModuleNameFromTypeRoots() {
+                            var typeRoots = ts.getEffectiveTypeRoots(options, context.host);
+                            if (typeRoots) {
+                                var normalizedTypeRoots = ts.map(typeRoots, function (typeRoot) { return ts.toPath(typeRoot, /*basePath*/ undefined, getCanonicalFileName); });
+                                for (var _i = 0, normalizedTypeRoots_1 = normalizedTypeRoots; _i < normalizedTypeRoots_1.length; _i++) {
+                                    var typeRoot = normalizedTypeRoots_1[_i];
+                                    if (ts.startsWith(moduleFileName, typeRoot)) {
+                                        var relativeFileName = moduleFileName.substring(typeRoot.length + 1);
+                                        return removeExtensionAndIndexPostFix(relativeFileName);
+                                    }
+                                }
+                            }
+                        }
+                        function tryGetModuleNameAsNodeModule() {
+                            if (ts.getEmitModuleResolutionKind(options) !== ts.ModuleResolutionKind.NodeJs) {
+                                // nothing to do here
+                                return undefined;
+                            }
+                            var indexOfNodeModules = moduleFileName.indexOf("node_modules");
+                            if (indexOfNodeModules < 0) {
+                                return undefined;
+                            }
+                            var relativeFileName;
+                            if (sourceDirectory.indexOf(moduleFileName.substring(0, indexOfNodeModules - 1)) === 0) {
+                                // if node_modules folder is in this folder or any of its parent folder, no need to keep it.
+                                relativeFileName = moduleFileName.substring(indexOfNodeModules + 13 /* "node_modules\".length */);
+                            }
+                            else {
+                                relativeFileName = getRelativePath(moduleFileName, sourceDirectory);
+                            }
+                            relativeFileName = ts.removeFileExtension(relativeFileName);
+                            if (ts.endsWith(relativeFileName, "/index")) {
+                                relativeFileName = ts.getDirectoryPath(relativeFileName);
+                            }
+                            else {
+                                try {
+                                    var moduleDirectory = ts.getDirectoryPath(moduleFileName);
+                                    var packageJsonContent = JSON.parse(context.host.readFile(ts.combinePaths(moduleDirectory, "package.json")));
+                                    if (packageJsonContent) {
+                                        var mainFile = packageJsonContent.main || packageJsonContent.typings;
+                                        if (mainFile) {
+                                            var mainExportFile = ts.toPath(mainFile, moduleDirectory, getCanonicalFileName);
+                                            if (ts.removeFileExtension(mainExportFile) === ts.removeFileExtension(moduleFileName)) {
+                                                relativeFileName = ts.getDirectoryPath(relativeFileName);
+                                            }
+                                        }
+                                    }
+                                }
+                                catch (e) { }
+                            }
+                            return ts.getPackageNameFromAtTypesDirectory(relativeFileName);
                         }
-                        current_1--;
-                    }
-                    var lineStart = ts.getLineStartPositionForPosition(current_1, sourceFile);
-                    return SmartIndenter.findFirstNonWhitespaceColumn(lineStart, current_1, sourceFile, options);
-                }
-                if (precedingToken.kind === 24 /* CommaToken */ && precedingToken.parent.kind !== 187 /* BinaryExpression */) {
-                    // previous token is comma that separates items in list - find the previous item and try to derive indentation from it
-                    var actualIndentation = getActualIndentationForListItemBeforeComma(precedingToken, sourceFile, options);
-                    if (actualIndentation !== -1 /* Unknown */) {
-                        return actualIndentation;
                     }
-                }
-                // try to find node that can contribute to indentation and includes 'position' starting from 'precedingToken'
-                // if such node is found - compute initial indentation for 'position' inside this node
-                var previous;
-                var current = precedingToken;
-                var currentStart;
-                var indentationDelta;
-                while (current) {
-                    if (ts.positionBelongsToNode(current, position, sourceFile) && shouldIndentChildNode(current, previous)) {
-                        currentStart = getStartLineAndCharacterForNode(current, sourceFile);
-                        if (nextTokenIsCurlyBraceOnSameLineAsCursor(precedingToken, current, lineAtPosition, sourceFile)) {
-                            indentationDelta = 0;
+                    function getPathRelativeToRootDirs(path, rootDirs) {
+                        for (var _i = 0, rootDirs_2 = rootDirs; _i < rootDirs_2.length; _i++) {
+                            var rootDir = rootDirs_2[_i];
+                            var relativeName = getRelativePathIfInDirectory(path, rootDir);
+                            if (relativeName !== undefined) {
+                                return relativeName;
+                            }
                         }
-                        else {
-                            indentationDelta = lineAtPosition !== currentStart.line ? options.indentSize : 0;
+                        return undefined;
+                    }
+                    function removeExtensionAndIndexPostFix(fileName) {
+                        fileName = ts.removeFileExtension(fileName);
+                        if (ts.endsWith(fileName, "/index")) {
+                            fileName = fileName.substr(0, fileName.length - 6 /* "/index".length */);
                         }
-                        break;
+                        return fileName;
                     }
-                    // check if current node is a list item - if yes, take indentation from it
-                    var actualIndentation = getActualIndentationForListItem(current, sourceFile, options);
-                    if (actualIndentation !== -1 /* Unknown */) {
-                        return actualIndentation;
+                    function getRelativePathIfInDirectory(path, directoryPath) {
+                        var relativePath = ts.getRelativePathToDirectoryOrUrl(directoryPath, path, directoryPath, getCanonicalFileName, /*isAbsolutePathAnUrl*/ false);
+                        return ts.isRootedDiskPath(relativePath) || ts.startsWith(relativePath, "..") ? undefined : relativePath;
                     }
-                    actualIndentation = getLineIndentationWhenExpressionIsInMultiLine(current, sourceFile, options);
-                    if (actualIndentation !== -1 /* Unknown */) {
-                        return actualIndentation + options.indentSize;
+                    function getRelativePath(path, directoryPath) {
+                        var relativePath = ts.getRelativePathToDirectoryOrUrl(directoryPath, path, directoryPath, getCanonicalFileName, /*isAbsolutePathAnUrl*/ false);
+                        return ts.moduleHasNonRelativeName(relativePath) ? "./" + relativePath : relativePath;
                     }
-                    previous = current;
-                    current = current.parent;
                 }
-                if (!current) {
-                    // no parent was found - return the base indentation of the SourceFile
-                    return getBaseIndentation(options);
+            }
+            function createChangeTracker() {
+                return ts.textChanges.ChangeTracker.fromCodeFixContext(context);
+            }
+            function createCodeAction(description, diagnosticArgs, changes, kind, moduleSpecifier) {
+                return {
+                    description: ts.formatMessage.apply(undefined, [undefined, description].concat(diagnosticArgs)),
+                    changes: changes,
+                    kind: kind,
+                    moduleSpecifier: moduleSpecifier
+                };
+            }
+        }
+    })(codefix = ts.codefix || (ts.codefix = {}));
+})(ts || (ts = {}));
+/* @internal */
+var ts;
+(function (ts) {
+    var codefix;
+    (function (codefix) {
+        codefix.registerCodeFix({
+            errorCodes: getApplicableDiagnosticCodes(),
+            getCodeActions: getDisableJsDiagnosticsCodeActions
+        });
+        function getApplicableDiagnosticCodes() {
+            var allDiagnostcs = ts.Diagnostics;
+            return Object.keys(allDiagnostcs)
+                .filter(function (d) { return allDiagnostcs[d] && allDiagnostcs[d].category === ts.DiagnosticCategory.Error; })
+                .map(function (d) { return allDiagnostcs[d].code; });
+        }
+        function getIgnoreCommentLocationForLocation(sourceFile, position, newLineCharacter) {
+            var line = ts.getLineAndCharacterOfPosition(sourceFile, position).line;
+            var lineStartPosition = ts.getStartPositionOfLine(line, sourceFile);
+            var startPosition = ts.getFirstNonSpaceCharacterPosition(sourceFile.text, lineStartPosition);
+            // First try to see if we can put the '// @ts-ignore' on the previous line.
+            // We need to make sure that we are not in the middle of a string literal or a comment.
+            // We also want to check if the previous line holds a comment for a node on the next line
+            // if so, we do not want to separate the node from its comment if we can.
+            if (!ts.isInComment(sourceFile, startPosition) && !ts.isInString(sourceFile, startPosition) && !ts.isInTemplateString(sourceFile, startPosition)) {
+                var token = ts.getTouchingToken(sourceFile, startPosition, /*includeJsDocComment*/ false);
+                var tokenLeadingCommnets = ts.getLeadingCommentRangesOfNode(token, sourceFile);
+                if (!tokenLeadingCommnets || !tokenLeadingCommnets.length || tokenLeadingCommnets[0].pos >= startPosition) {
+                    return {
+                        span: { start: startPosition, length: 0 },
+                        newText: "// @ts-ignore" + newLineCharacter
+                    };
                 }
-                return getIndentationForNodeWorker(current, currentStart, /*ignoreActualIndentationRange*/ undefined, indentationDelta, sourceFile, options);
             }
-            SmartIndenter.getIndentation = getIndentation;
-            function getIndentationForNode(n, ignoreActualIndentationRange, sourceFile, options) {
-                var start = sourceFile.getLineAndCharacterOfPosition(n.getStart(sourceFile));
-                return getIndentationForNodeWorker(n, start, ignoreActualIndentationRange, /*indentationDelta*/ 0, sourceFile, options);
+            // If all fails, add an extra new line immediatlly before the error span.
+            return {
+                span: { start: position, length: 0 },
+                newText: (position === startPosition ? "" : newLineCharacter) + "// @ts-ignore" + newLineCharacter
+            };
+        }
+        function getDisableJsDiagnosticsCodeActions(context) {
+            var sourceFile = context.sourceFile, program = context.program, newLineCharacter = context.newLineCharacter, span = context.span;
+            if (!ts.isInJavaScriptFile(sourceFile) || !ts.isCheckJsEnabledForFile(sourceFile, program.getCompilerOptions())) {
+                return undefined;
             }
-            SmartIndenter.getIndentationForNode = getIndentationForNode;
-            function getBaseIndentation(options) {
-                return options.baseIndentSize || 0;
+            return [{
+                    description: ts.getLocaleSpecificMessage(ts.Diagnostics.Ignore_this_error_message),
+                    changes: [{
+                            fileName: sourceFile.fileName,
+                            textChanges: [getIgnoreCommentLocationForLocation(sourceFile, span.start, newLineCharacter)]
+                        }]
+                },
+                {
+                    description: ts.getLocaleSpecificMessage(ts.Diagnostics.Disable_checking_for_this_file),
+                    changes: [{
+                            fileName: sourceFile.fileName,
+                            textChanges: [{
+                                    span: {
+                                        start: sourceFile.checkJsDirective ? sourceFile.checkJsDirective.pos : 0,
+                                        length: sourceFile.checkJsDirective ? sourceFile.checkJsDirective.end - sourceFile.checkJsDirective.pos : 0
+                                    },
+                                    newText: "// @ts-nocheck" + newLineCharacter
+                                }]
+                        }]
+                }];
+        }
+    })(codefix = ts.codefix || (ts.codefix = {}));
+})(ts || (ts = {}));
+/* @internal */
+var ts;
+(function (ts) {
+    var codefix;
+    (function (codefix) {
+        function newNodesToChanges(newNodes, insertAfter, context) {
+            var sourceFile = context.sourceFile;
+            var changeTracker = ts.textChanges.ChangeTracker.fromCodeFixContext(context);
+            for (var _i = 0, newNodes_1 = newNodes; _i < newNodes_1.length; _i++) {
+                var newNode = newNodes_1[_i];
+                changeTracker.insertNodeAfter(sourceFile, insertAfter, newNode, { suffix: context.newLineCharacter });
+            }
+            var changes = changeTracker.getChanges();
+            if (!ts.some(changes)) {
+                return changes;
+            }
+            ts.Debug.assert(changes.length === 1);
+            var consolidatedChanges = [{
+                    fileName: changes[0].fileName,
+                    textChanges: [{
+                            span: changes[0].textChanges[0].span,
+                            newText: changes[0].textChanges.reduce(function (prev, cur) { return prev + cur.newText; }, "")
+                        }]
+                }];
+            return consolidatedChanges;
+        }
+        codefix.newNodesToChanges = newNodesToChanges;
+        /**
+         * Finds members of the resolved type that are missing in the class pointed to by class decl
+         * and generates source code for the missing members.
+         * @param possiblyMissingSymbols The collection of symbols to filter and then get insertions for.
+         * @returns Empty string iff there are no member insertions.
+         */
+        function createMissingMemberNodes(classDeclaration, possiblyMissingSymbols, checker) {
+            var classMembers = classDeclaration.symbol.members;
+            var missingMembers = possiblyMissingSymbols.filter(function (symbol) { return !classMembers.has(symbol.getName()); });
+            var newNodes = [];
+            for (var _i = 0, missingMembers_1 = missingMembers; _i < missingMembers_1.length; _i++) {
+                var symbol = missingMembers_1[_i];
+                var newNode = createNewNodeForMemberSymbol(symbol, classDeclaration, checker);
+                if (newNode) {
+                    if (Array.isArray(newNode)) {
+                        newNodes = newNodes.concat(newNode);
+                    }
+                    else {
+                        newNodes.push(newNode);
+                    }
+                }
             }
-            SmartIndenter.getBaseIndentation = getBaseIndentation;
-            function getIndentationForNodeWorker(current, currentStart, ignoreActualIndentationRange, indentationDelta, sourceFile, options) {
-                var parent = current.parent;
-                var parentStart;
-                // walk upwards and collect indentations for pairs of parent-child nodes
-                // indentation is not added if parent and child nodes start on the same line or if parent is IfStatement and child starts on the same line with 'else clause'
-                while (parent) {
-                    var useActualIndentation = true;
-                    if (ignoreActualIndentationRange) {
-                        var start = current.getStart(sourceFile);
-                        useActualIndentation = start < ignoreActualIndentationRange.pos || start > ignoreActualIndentationRange.end;
+            return newNodes;
+        }
+        codefix.createMissingMemberNodes = createMissingMemberNodes;
+        /**
+         * @returns Empty string iff there we can't figure out a representation for `symbol` in `enclosingDeclaration`.
+         */
+        function createNewNodeForMemberSymbol(symbol, enclosingDeclaration, checker) {
+            var declarations = symbol.getDeclarations();
+            if (!(declarations && declarations.length)) {
+                return undefined;
+            }
+            var declaration = declarations[0];
+            // Clone name to remove leading trivia.
+            var name = ts.getSynthesizedClone(ts.getNameOfDeclaration(declaration));
+            var visibilityModifier = createVisibilityModifier(ts.getModifierFlags(declaration));
+            var modifiers = visibilityModifier ? ts.createNodeArray([visibilityModifier]) : undefined;
+            var type = checker.getWidenedType(checker.getTypeOfSymbolAtLocation(symbol, enclosingDeclaration));
+            var optional = !!(symbol.flags & 67108864 /* Optional */);
+            switch (declaration.kind) {
+                case 153 /* GetAccessor */:
+                case 154 /* SetAccessor */:
+                case 148 /* PropertySignature */:
+                case 149 /* PropertyDeclaration */:
+                    var typeNode = checker.typeToTypeNode(type, enclosingDeclaration);
+                    var property = ts.createProperty(
+                    /*decorators*/ undefined, modifiers, name, optional ? ts.createToken(55 /* QuestionToken */) : undefined, typeNode, 
+                    /*initializer*/ undefined);
+                    return property;
+                case 150 /* MethodSignature */:
+                case 151 /* MethodDeclaration */:
+                    // The signature for the implementation appears as an entry in `signatures` iff
+                    // there is only one signature.
+                    // If there are overloads and an implementation signature, it appears as an
+                    // extra declaration that isn't a signature for `type`.
+                    // If there is more than one overload but no implementation signature
+                    // (eg: an abstract method or interface declaration), there is a 1-1
+                    // correspondence of declarations and signatures.
+                    var signatures = checker.getSignaturesOfType(type, 0 /* Call */);
+                    if (!ts.some(signatures)) {
+                        return undefined;
                     }
-                    if (useActualIndentation) {
-                        // check if current node is a list item - if yes, take indentation from it
-                        var actualIndentation = getActualIndentationForListItem(current, sourceFile, options);
-                        if (actualIndentation !== -1 /* Unknown */) {
-                            return actualIndentation + indentationDelta;
-                        }
+                    if (declarations.length === 1) {
+                        ts.Debug.assert(signatures.length === 1);
+                        var signature = signatures[0];
+                        return signatureToMethodDeclaration(signature, enclosingDeclaration, createStubbedMethodBody());
                     }
-                    parentStart = getParentStart(parent, current, sourceFile);
-                    var parentAndChildShareLine = parentStart.line === currentStart.line ||
-                        childStartsOnTheSameLineWithElseInIfStatement(parent, current, currentStart.line, sourceFile);
-                    if (useActualIndentation) {
-                        // try to fetch actual indentation for current node from source text
-                        var actualIndentation = getActualIndentationForNode(current, parent, currentStart, parentAndChildShareLine, sourceFile, options);
-                        if (actualIndentation !== -1 /* Unknown */) {
-                            return actualIndentation + indentationDelta;
+                    var signatureDeclarations = [];
+                    for (var i = 0; i < signatures.length; i++) {
+                        var signature = signatures[i];
+                        var methodDeclaration = signatureToMethodDeclaration(signature, enclosingDeclaration);
+                        if (methodDeclaration) {
+                            signatureDeclarations.push(methodDeclaration);
                         }
-                        actualIndentation = getLineIndentationWhenExpressionIsInMultiLine(current, sourceFile, options);
-                        if (actualIndentation !== -1 /* Unknown */) {
-                            return actualIndentation + indentationDelta;
+                    }
+                    if (declarations.length > signatures.length) {
+                        var signature = checker.getSignatureFromDeclaration(declarations[declarations.length - 1]);
+                        var methodDeclaration = signatureToMethodDeclaration(signature, enclosingDeclaration, createStubbedMethodBody());
+                        if (methodDeclaration) {
+                            signatureDeclarations.push(methodDeclaration);
                         }
                     }
-                    // increase indentation if parent node wants its content to be indented and parent and child nodes don't start on the same line
-                    if (shouldIndentChildNode(parent, current) && !parentAndChildShareLine) {
-                        indentationDelta += options.indentSize;
+                    else {
+                        ts.Debug.assert(declarations.length === signatures.length);
+                        var methodImplementingSignatures = createMethodImplementingSignatures(signatures, name, optional, modifiers);
+                        signatureDeclarations.push(methodImplementingSignatures);
                     }
-                    current = parent;
-                    currentStart = parentStart;
-                    parent = current.parent;
-                }
-                return indentationDelta + getBaseIndentation(options);
+                    return signatureDeclarations;
+                default:
+                    return undefined;
             }
-            function getParentStart(parent, child, sourceFile) {
-                var containingList = getContainingList(child, sourceFile);
-                if (containingList) {
-                    return sourceFile.getLineAndCharacterOfPosition(containingList.pos);
+            function signatureToMethodDeclaration(signature, enclosingDeclaration, body) {
+                var signatureDeclaration = checker.signatureToSignatureDeclaration(signature, 151 /* MethodDeclaration */, enclosingDeclaration, ts.NodeBuilderFlags.SuppressAnyReturnType);
+                if (signatureDeclaration) {
+                    signatureDeclaration.decorators = undefined;
+                    signatureDeclaration.modifiers = modifiers;
+                    signatureDeclaration.name = name;
+                    signatureDeclaration.questionToken = optional ? ts.createToken(55 /* QuestionToken */) : undefined;
+                    signatureDeclaration.body = body;
                 }
-                return sourceFile.getLineAndCharacterOfPosition(parent.getStart(sourceFile));
+                return signatureDeclaration;
             }
-            /*
-             * Function returns Value.Unknown if indentation cannot be determined
-             */
-            function getActualIndentationForListItemBeforeComma(commaToken, sourceFile, options) {
-                // previous token is comma that separates items in list - find the previous item and try to derive indentation from it
-                var commaItemInfo = ts.findListItemInfo(commaToken);
-                if (commaItemInfo && commaItemInfo.listItemIndex > 0) {
-                    return deriveActualIndentationFromList(commaItemInfo.list.getChildren(), commaItemInfo.listItemIndex - 1, sourceFile, options);
-                }
-                else {
-                    // handle broken code gracefully
-                    return -1 /* Unknown */;
+        }
+        function createMethodFromCallExpression(callExpression, methodName, includeTypeScriptSyntax, makeStatic) {
+            var parameters = createDummyParameters(callExpression.arguments.length, /*names*/ undefined, /*minArgumentCount*/ undefined, includeTypeScriptSyntax);
+            var typeParameters;
+            if (includeTypeScriptSyntax) {
+                var typeArgCount = ts.length(callExpression.typeArguments);
+                for (var i = 0; i < typeArgCount; i++) {
+                    var name_70 = typeArgCount < 8 ? String.fromCharCode(84 /* T */ + i) : "T" + i;
+                    var typeParameter = ts.createTypeParameterDeclaration(name_70, /*constraint*/ undefined, /*defaultType*/ undefined);
+                    (typeParameters ? typeParameters : typeParameters = []).push(typeParameter);
                 }
             }
-            /*
-             * Function returns Value.Unknown if actual indentation for node should not be used (i.e because node is nested expression)
+            var newMethod = ts.createMethod(
+            /*decorators*/ undefined, 
+            /*modifiers*/ makeStatic ? [ts.createToken(115 /* StaticKeyword */)] : undefined, 
+            /*asteriskToken*/ undefined, methodName, 
+            /*questionToken*/ undefined, typeParameters, parameters, 
+            /*type*/ includeTypeScriptSyntax ? ts.createKeywordTypeNode(119 /* AnyKeyword */) : undefined, createStubbedMethodBody());
+            return newMethod;
+        }
+        codefix.createMethodFromCallExpression = createMethodFromCallExpression;
+        function createDummyParameters(argCount, names, minArgumentCount, addAnyType) {
+            var parameters = [];
+            for (var i = 0; i < argCount; i++) {
+                var newParameter = ts.createParameter(
+                /*decorators*/ undefined, 
+                /*modifiers*/ undefined, 
+                /*dotDotDotToken*/ undefined, 
+                /*name*/ names && names[i] || "arg" + i, 
+                /*questionToken*/ minArgumentCount !== undefined && i >= minArgumentCount ? ts.createToken(55 /* QuestionToken */) : undefined, 
+                /*type*/ addAnyType ? ts.createKeywordTypeNode(119 /* AnyKeyword */) : undefined, 
+                /*initializer*/ undefined);
+                parameters.push(newParameter);
+            }
+            return parameters;
+        }
+        function createMethodImplementingSignatures(signatures, name, optional, modifiers) {
+            /** This is *a* signature with the maximal number of arguments,
+             * such that if there is a "maximal" signature without rest arguments,
+             * this is one of them.
              */
-            function getActualIndentationForNode(current, parent, currentLineAndChar, parentAndChildShareLine, sourceFile, options) {
-                // actual indentation is used for statements\declarations if one of cases below is true:
-                // - parent is SourceFile - by default immediate children of SourceFile are not indented except when user indents them manually
-                // - parent and child are not on the same line
-                var useActualIndentation = (ts.isDeclaration(current) || ts.isStatementButNotDeclaration(current)) &&
-                    (parent.kind === 256 /* SourceFile */ || !parentAndChildShareLine);
-                if (!useActualIndentation) {
-                    return -1 /* Unknown */;
-                }
-                return findColumnForFirstNonWhitespaceCharacterInLine(currentLineAndChar, sourceFile, options);
-            }
-            function nextTokenIsCurlyBraceOnSameLineAsCursor(precedingToken, current, lineAtPosition, sourceFile) {
-                var nextToken = ts.findNextToken(precedingToken, current);
-                if (!nextToken) {
-                    return false;
-                }
-                if (nextToken.kind === 15 /* OpenBraceToken */) {
-                    // open braces are always indented at the parent level
-                    return true;
-                }
-                else if (nextToken.kind === 16 /* CloseBraceToken */) {
-                    // close braces are indented at the parent level if they are located on the same line with cursor
-                    // this means that if new line will be added at $ position, this case will be indented
-                    // class A {
-                    //    $
-                    // }
-                    /// and this one - not
-                    // class A {
-                    // $}
-                    var nextTokenStartLine = getStartLineAndCharacterForNode(nextToken, sourceFile).line;
-                    return lineAtPosition === nextTokenStartLine;
-                }
-                return false;
-            }
-            function getStartLineAndCharacterForNode(n, sourceFile) {
-                return sourceFile.getLineAndCharacterOfPosition(n.getStart(sourceFile));
+            var maxArgsSignature = signatures[0];
+            var minArgumentCount = signatures[0].minArgumentCount;
+            var someSigHasRestParameter = false;
+            for (var i = 0; i < signatures.length; i++) {
+                var sig = signatures[i];
+                minArgumentCount = Math.min(sig.minArgumentCount, minArgumentCount);
+                if (sig.hasRestParameter) {
+                    someSigHasRestParameter = true;
+                }
+                if (sig.parameters.length >= maxArgsSignature.parameters.length && (!sig.hasRestParameter || maxArgsSignature.hasRestParameter)) {
+                    maxArgsSignature = sig;
+                }
+            }
+            var maxNonRestArgs = maxArgsSignature.parameters.length - (maxArgsSignature.hasRestParameter ? 1 : 0);
+            var maxArgsParameterSymbolNames = maxArgsSignature.parameters.map(function (symbol) { return symbol.getName(); });
+            var parameters = createDummyParameters(maxNonRestArgs, maxArgsParameterSymbolNames, minArgumentCount, /*addAnyType*/ true);
+            if (someSigHasRestParameter) {
+                var anyArrayType = ts.createArrayTypeNode(ts.createKeywordTypeNode(119 /* AnyKeyword */));
+                var restParameter = ts.createParameter(
+                /*decorators*/ undefined, 
+                /*modifiers*/ undefined, ts.createToken(24 /* DotDotDotToken */), maxArgsParameterSymbolNames[maxNonRestArgs] || "rest", 
+                /*questionToken*/ maxNonRestArgs >= minArgumentCount ? ts.createToken(55 /* QuestionToken */) : undefined, anyArrayType, 
+                /*initializer*/ undefined);
+                parameters.push(restParameter);
+            }
+            return createStubbedMethod(modifiers, name, optional, 
+            /*typeParameters*/ undefined, parameters, 
+            /*returnType*/ undefined);
+        }
+        function createStubbedMethod(modifiers, name, optional, typeParameters, parameters, returnType) {
+            return ts.createMethod(
+            /*decorators*/ undefined, modifiers, 
+            /*asteriskToken*/ undefined, name, optional ? ts.createToken(55 /* QuestionToken */) : undefined, typeParameters, parameters, returnType, createStubbedMethodBody());
+        }
+        codefix.createStubbedMethod = createStubbedMethod;
+        function createStubbedMethodBody() {
+            return ts.createBlock([ts.createThrow(ts.createNew(ts.createIdentifier("Error"), 
+                /*typeArguments*/ undefined, [ts.createLiteral("Method not implemented.")]))], 
+            /*multiline*/ true);
+        }
+        function createVisibilityModifier(flags) {
+            if (flags & 4 /* Public */) {
+                return ts.createToken(114 /* PublicKeyword */);
             }
-            function childStartsOnTheSameLineWithElseInIfStatement(parent, child, childStartLine, sourceFile) {
-                if (parent.kind === 203 /* IfStatement */ && parent.elseStatement === child) {
-                    var elseKeyword = ts.findChildOfKind(parent, 80 /* ElseKeyword */, sourceFile);
-                    ts.Debug.assert(elseKeyword !== undefined);
-                    var elseKeywordStartLine = getStartLineAndCharacterForNode(elseKeyword, sourceFile).line;
-                    return elseKeywordStartLine === childStartLine;
-                }
-                return false;
+            else if (flags & 16 /* Protected */) {
+                return ts.createToken(113 /* ProtectedKeyword */);
             }
-            SmartIndenter.childStartsOnTheSameLineWithElseInIfStatement = childStartsOnTheSameLineWithElseInIfStatement;
-            function getContainingList(node, sourceFile) {
-                if (node.parent) {
-                    switch (node.parent.kind) {
-                        case 155 /* TypeReference */:
-                            if (node.parent.typeArguments &&
-                                ts.rangeContainsStartEnd(node.parent.typeArguments, node.getStart(sourceFile), node.getEnd())) {
-                                return node.parent.typeArguments;
-                            }
-                            break;
-                        case 171 /* ObjectLiteralExpression */:
-                            return node.parent.properties;
-                        case 170 /* ArrayLiteralExpression */:
-                            return node.parent.elements;
-                        case 220 /* FunctionDeclaration */:
-                        case 179 /* FunctionExpression */:
-                        case 180 /* ArrowFunction */:
-                        case 147 /* MethodDeclaration */:
-                        case 146 /* MethodSignature */:
-                        case 151 /* CallSignature */:
-                        case 152 /* ConstructSignature */: {
-                            var start = node.getStart(sourceFile);
-                            if (node.parent.typeParameters &&
-                                ts.rangeContainsStartEnd(node.parent.typeParameters, start, node.getEnd())) {
-                                return node.parent.typeParameters;
-                            }
-                            if (ts.rangeContainsStartEnd(node.parent.parameters, start, node.getEnd())) {
-                                return node.parent.parameters;
-                            }
-                            break;
-                        }
-                        case 175 /* NewExpression */:
-                        case 174 /* CallExpression */: {
-                            var start = node.getStart(sourceFile);
-                            if (node.parent.typeArguments &&
-                                ts.rangeContainsStartEnd(node.parent.typeArguments, start, node.getEnd())) {
-                                return node.parent.typeArguments;
-                            }
-                            if (node.parent.arguments &&
-                                ts.rangeContainsStartEnd(node.parent.arguments, start, node.getEnd())) {
-                                return node.parent.arguments;
+            return undefined;
+        }
+    })(codefix = ts.codefix || (ts.codefix = {}));
+})(ts || (ts = {}));
+/// <reference path="fixClassIncorrectlyImplementsInterface.ts" />
+/// <reference path="fixAddMissingMember.ts" />
+/// <reference path="fixSpelling.ts" />
+/// <reference path="fixClassDoesntImplementInheritedAbstractMember.ts" />
+/// <reference path="fixClassSuperMustPrecedeThisAccess.ts" />
+/// <reference path="fixConstructorForDerivedNeedSuperCall.ts" />
+/// <reference path="fixExtendsInterfaceBecomesImplements.ts" />
+/// <reference path="fixForgottenThisPropertyAccess.ts" />
+/// <reference path='fixUnusedIdentifier.ts' />
+/// <reference path='importFixes.ts' />
+/// <reference path='disableJsDiagnostics.ts' />
+/// <reference path='helpers.ts' />
+/* @internal */
+var ts;
+(function (ts) {
+    var refactor;
+    (function (refactor) {
+        var actionName = "convert";
+        var convertFunctionToES6Class = {
+            name: "Convert to ES2015 class",
+            description: ts.Diagnostics.Convert_function_to_an_ES2015_class.message,
+            getEditsForAction: getEditsForAction,
+            getAvailableActions: getAvailableActions
+        };
+        refactor.registerRefactor(convertFunctionToES6Class);
+        function getAvailableActions(context) {
+            var start = context.startPosition;
+            var node = ts.getTokenAtPosition(context.file, start, /*includeJsDocComment*/ false);
+            var checker = context.program.getTypeChecker();
+            var symbol = checker.getSymbolAtLocation(node);
+            if (symbol && ts.isDeclarationOfFunctionOrClassExpression(symbol)) {
+                symbol = symbol.valueDeclaration.initializer.symbol;
+            }
+            if (symbol && (symbol.flags & 16 /* Function */) && symbol.members && (symbol.members.size > 0)) {
+                return [
+                    {
+                        name: convertFunctionToES6Class.name,
+                        description: convertFunctionToES6Class.description,
+                        actions: [
+                            {
+                                description: convertFunctionToES6Class.description,
+                                name: actionName
                             }
-                            break;
-                        }
+                        ]
                     }
-                }
+                ];
+            }
+        }
+        function getEditsForAction(context, action) {
+            // Somehow wrong action got invoked?
+            if (actionName !== action) {
                 return undefined;
             }
-            function getActualIndentationForListItem(node, sourceFile, options) {
-                var containingList = getContainingList(node, sourceFile);
-                return containingList ? getActualIndentationFromList(containingList) : -1 /* Unknown */;
-                function getActualIndentationFromList(list) {
-                    var index = ts.indexOf(list, node);
-                    return index !== -1 ? deriveActualIndentationFromList(list, index, sourceFile, options) : -1 /* Unknown */;
-                }
+            var start = context.startPosition;
+            var sourceFile = context.file;
+            var checker = context.program.getTypeChecker();
+            var token = ts.getTokenAtPosition(sourceFile, start, /*includeJsDocComment*/ false);
+            var ctorSymbol = checker.getSymbolAtLocation(token);
+            var newLine = context.rulesProvider.getFormatOptions().newLineCharacter;
+            var deletedNodes = [];
+            var deletes = [];
+            if (!(ctorSymbol.flags & (16 /* Function */ | 3 /* Variable */))) {
+                return undefined;
             }
-            function getLineIndentationWhenExpressionIsInMultiLine(node, sourceFile, options) {
-                // actual indentation should not be used when:
-                // - node is close parenthesis - this is the end of the expression
-                if (node.kind === 18 /* CloseParenToken */) {
-                    return -1 /* Unknown */;
-                }
-                if (node.parent && (node.parent.kind === 174 /* CallExpression */ ||
-                    node.parent.kind === 175 /* NewExpression */) &&
-                    node.parent.expression !== node) {
-                    var fullCallOrNewExpression = node.parent.expression;
-                    var startingExpression = getStartingExpression(fullCallOrNewExpression);
-                    if (fullCallOrNewExpression === startingExpression) {
-                        return -1 /* Unknown */;
+            var ctorDeclaration = ctorSymbol.valueDeclaration;
+            var changeTracker = ts.textChanges.ChangeTracker.fromCodeFixContext(context);
+            var precedingNode;
+            var newClassDeclaration;
+            switch (ctorDeclaration.kind) {
+                case 228 /* FunctionDeclaration */:
+                    precedingNode = ctorDeclaration;
+                    deleteNode(ctorDeclaration);
+                    newClassDeclaration = createClassFromFunctionDeclaration(ctorDeclaration);
+                    break;
+                case 226 /* VariableDeclaration */:
+                    precedingNode = ctorDeclaration.parent.parent;
+                    if (ctorDeclaration.parent.declarations.length === 1) {
+                        deleteNode(precedingNode);
                     }
-                    var fullCallOrNewExpressionEnd = sourceFile.getLineAndCharacterOfPosition(fullCallOrNewExpression.end);
-                    var startingExpressionEnd = sourceFile.getLineAndCharacterOfPosition(startingExpression.end);
-                    if (fullCallOrNewExpressionEnd.line === startingExpressionEnd.line) {
-                        return -1 /* Unknown */;
+                    else {
+                        deleteNode(ctorDeclaration, /*inList*/ true);
                     }
-                    return findColumnForFirstNonWhitespaceCharacterInLine(fullCallOrNewExpressionEnd, sourceFile, options);
+                    newClassDeclaration = createClassFromVariableDeclaration(ctorDeclaration);
+                    break;
+            }
+            if (!newClassDeclaration) {
+                return undefined;
+            }
+            // Because the preceding node could be touched, we need to insert nodes before delete nodes.
+            changeTracker.insertNodeAfter(sourceFile, precedingNode, newClassDeclaration, { suffix: newLine });
+            for (var _i = 0, deletes_1 = deletes; _i < deletes_1.length; _i++) {
+                var deleteCallback = deletes_1[_i];
+                deleteCallback();
+            }
+            return {
+                edits: changeTracker.getChanges()
+            };
+            function deleteNode(node, inList) {
+                if (inList === void 0) { inList = false; }
+                if (deletedNodes.some(function (n) { return ts.isNodeDescendantOf(node, n); })) {
+                    // Parent node has already been deleted; do nothing
+                    return;
                 }
-                return -1 /* Unknown */;
-                function getStartingExpression(node) {
-                    while (true) {
-                        switch (node.kind) {
-                            case 174 /* CallExpression */:
-                            case 175 /* NewExpression */:
-                            case 172 /* PropertyAccessExpression */:
-                            case 173 /* ElementAccessExpression */:
-                                node = node.expression;
-                                break;
-                            default:
-                                return node;
-                        }
-                    }
+                deletedNodes.push(node);
+                if (inList) {
+                    deletes.push(function () { return changeTracker.deleteNodeInList(sourceFile, node); });
                 }
-            }
-            function deriveActualIndentationFromList(list, index, sourceFile, options) {
-                ts.Debug.assert(index >= 0 && index < list.length);
-                var node = list[index];
-                // walk toward the start of the list starting from current node and check if the line is the same for all items.
-                // if end line for item [i - 1] differs from the start line for item [i] - find column of the first non-whitespace character on the line of item [i]
-                var lineAndCharacter = getStartLineAndCharacterForNode(node, sourceFile);
-                for (var i = index - 1; i >= 0; i--) {
-                    if (list[i].kind === 24 /* CommaToken */) {
-                        continue;
-                    }
-                    // skip list items that ends on the same line with the current list element
-                    var prevEndLine = sourceFile.getLineAndCharacterOfPosition(list[i].end).line;
-                    if (prevEndLine !== lineAndCharacter.line) {
-                        return findColumnForFirstNonWhitespaceCharacterInLine(lineAndCharacter, sourceFile, options);
-                    }
-                    lineAndCharacter = getStartLineAndCharacterForNode(list[i], sourceFile);
+                else {
+                    deletes.push(function () { return changeTracker.deleteNode(sourceFile, node); });
                 }
-                return -1 /* Unknown */;
-            }
-            function findColumnForFirstNonWhitespaceCharacterInLine(lineAndCharacter, sourceFile, options) {
-                var lineStart = sourceFile.getPositionOfLineAndCharacter(lineAndCharacter.line, 0);
-                return findFirstNonWhitespaceColumn(lineStart, lineStart + lineAndCharacter.character, sourceFile, options);
             }
-            /*
-                Character is the actual index of the character since the beginning of the line.
-                Column - position of the character after expanding tabs to spaces
-                "0\t2$"
-                value of 'character' for '$' is 3
-                value of 'column' for '$' is 6 (assuming that tab size is 4)
-            */
-            function findFirstNonWhitespaceCharacterAndColumn(startPos, endPos, sourceFile, options) {
-                var character = 0;
-                var column = 0;
-                for (var pos = startPos; pos < endPos; pos++) {
-                    var ch = sourceFile.text.charCodeAt(pos);
-                    if (!ts.isWhiteSpaceSingleLine(ch)) {
-                        break;
+            function createClassElementsFromSymbol(symbol) {
+                var memberElements = [];
+                // all instance members are stored in the "member" array of symbol
+                if (symbol.members) {
+                    symbol.members.forEach(function (member) {
+                        var memberElement = createClassElement(member, /*modifiers*/ undefined);
+                        if (memberElement) {
+                            memberElements.push(memberElement);
+                        }
+                    });
+                }
+                // all static members are stored in the "exports" array of symbol
+                if (symbol.exports) {
+                    symbol.exports.forEach(function (member) {
+                        var memberElement = createClassElement(member, [ts.createToken(115 /* StaticKeyword */)]);
+                        if (memberElement) {
+                            memberElements.push(memberElement);
+                        }
+                    });
+                }
+                return memberElements;
+                function shouldConvertDeclaration(_target, source) {
+                    // Right now the only thing we can convert are function expressions - other values shouldn't get
+                    // transformed. We can update this once ES public class properties are available.
+                    return ts.isFunctionLike(source);
+                }
+                function createClassElement(symbol, modifiers) {
+                    // both properties and methods are bound as property symbols
+                    if (!(symbol.flags & 4 /* Property */)) {
+                        return;
                     }
-                    if (ch === 9 /* tab */) {
-                        column += options.tabSize + (column % options.tabSize);
+                    var memberDeclaration = symbol.valueDeclaration;
+                    var assignmentBinaryExpression = memberDeclaration.parent;
+                    if (!shouldConvertDeclaration(memberDeclaration, assignmentBinaryExpression.right)) {
+                        return;
                     }
-                    else {
-                        column++;
+                    // delete the entire statement if this expression is the sole expression to take care of the semicolon at the end
+                    var nodeToDelete = assignmentBinaryExpression.parent && assignmentBinaryExpression.parent.kind === 210 /* ExpressionStatement */
+                        ? assignmentBinaryExpression.parent : assignmentBinaryExpression;
+                    deleteNode(nodeToDelete);
+                    if (!assignmentBinaryExpression.right) {
+                        return ts.createProperty([], modifiers, symbol.name, /*questionToken*/ undefined, 
+                        /*type*/ undefined, /*initializer*/ undefined);
+                    }
+                    switch (assignmentBinaryExpression.right.kind) {
+                        case 186 /* FunctionExpression */:
+                            var functionExpression = assignmentBinaryExpression.right;
+                            return ts.createMethod(/*decorators*/ undefined, modifiers, /*asteriskToken*/ undefined, memberDeclaration.name, /*questionToken*/ undefined, 
+                            /*typeParameters*/ undefined, functionExpression.parameters, /*type*/ undefined, functionExpression.body);
+                        case 187 /* ArrowFunction */:
+                            var arrowFunction = assignmentBinaryExpression.right;
+                            var arrowFunctionBody = arrowFunction.body;
+                            var bodyBlock = void 0;
+                            // case 1: () => { return [1,2,3] }
+                            if (arrowFunctionBody.kind === 207 /* Block */) {
+                                bodyBlock = arrowFunctionBody;
+                            }
+                            else {
+                                var expression = arrowFunctionBody;
+                                bodyBlock = ts.createBlock([ts.createReturn(expression)]);
+                            }
+                            return ts.createMethod(/*decorators*/ undefined, modifiers, /*asteriskToken*/ undefined, memberDeclaration.name, /*questionToken*/ undefined, 
+                            /*typeParameters*/ undefined, arrowFunction.parameters, /*type*/ undefined, bodyBlock);
+                        default:
+                            // Don't try to declare members in JavaScript files
+                            if (ts.isSourceFileJavaScript(sourceFile)) {
+                                return;
+                            }
+                            return ts.createProperty(/*decorators*/ undefined, modifiers, memberDeclaration.name, /*questionToken*/ undefined, 
+                            /*type*/ undefined, assignmentBinaryExpression.right);
                     }
-                    character++;
                 }
-                return { column: column, character: character };
-            }
-            SmartIndenter.findFirstNonWhitespaceCharacterAndColumn = findFirstNonWhitespaceCharacterAndColumn;
-            function findFirstNonWhitespaceColumn(startPos, endPos, sourceFile, options) {
-                return findFirstNonWhitespaceCharacterAndColumn(startPos, endPos, sourceFile, options).column;
             }
-            SmartIndenter.findFirstNonWhitespaceColumn = findFirstNonWhitespaceColumn;
-            function nodeContentIsAlwaysIndented(kind) {
-                switch (kind) {
-                    case 202 /* ExpressionStatement */:
-                    case 221 /* ClassDeclaration */:
-                    case 192 /* ClassExpression */:
-                    case 222 /* InterfaceDeclaration */:
-                    case 224 /* EnumDeclaration */:
-                    case 223 /* TypeAliasDeclaration */:
-                    case 170 /* ArrayLiteralExpression */:
-                    case 199 /* Block */:
-                    case 226 /* ModuleBlock */:
-                    case 171 /* ObjectLiteralExpression */:
-                    case 159 /* TypeLiteral */:
-                    case 161 /* TupleType */:
-                    case 227 /* CaseBlock */:
-                    case 250 /* DefaultClause */:
-                    case 249 /* CaseClause */:
-                    case 178 /* ParenthesizedExpression */:
-                    case 172 /* PropertyAccessExpression */:
-                    case 174 /* CallExpression */:
-                    case 175 /* NewExpression */:
-                    case 200 /* VariableStatement */:
-                    case 218 /* VariableDeclaration */:
-                    case 235 /* ExportAssignment */:
-                    case 211 /* ReturnStatement */:
-                    case 188 /* ConditionalExpression */:
-                    case 168 /* ArrayBindingPattern */:
-                    case 167 /* ObjectBindingPattern */:
-                    case 243 /* JsxOpeningElement */:
-                    case 242 /* JsxSelfClosingElement */:
-                    case 248 /* JsxExpression */:
-                    case 146 /* MethodSignature */:
-                    case 151 /* CallSignature */:
-                    case 152 /* ConstructSignature */:
-                    case 142 /* Parameter */:
-                    case 156 /* FunctionType */:
-                    case 157 /* ConstructorType */:
-                    case 164 /* ParenthesizedType */:
-                    case 176 /* TaggedTemplateExpression */:
-                    case 184 /* AwaitExpression */:
-                    case 237 /* NamedExports */:
-                    case 233 /* NamedImports */:
-                    case 238 /* ExportSpecifier */:
-                    case 234 /* ImportSpecifier */:
-                        return true;
+            function createClassFromVariableDeclaration(node) {
+                var initializer = node.initializer;
+                if (!initializer || initializer.kind !== 186 /* FunctionExpression */) {
+                    return undefined;
                 }
-                return false;
-            }
-            /* @internal */
-            function nodeWillIndentChild(parent, child, indentByDefault) {
-                var childKind = child ? child.kind : 0 /* Unknown */;
-                switch (parent.kind) {
-                    case 204 /* DoStatement */:
-                    case 205 /* WhileStatement */:
-                    case 207 /* ForInStatement */:
-                    case 208 /* ForOfStatement */:
-                    case 206 /* ForStatement */:
-                    case 203 /* IfStatement */:
-                    case 220 /* FunctionDeclaration */:
-                    case 179 /* FunctionExpression */:
-                    case 147 /* MethodDeclaration */:
-                    case 180 /* ArrowFunction */:
-                    case 148 /* Constructor */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                        return childKind !== 199 /* Block */;
-                    case 236 /* ExportDeclaration */:
-                        return childKind !== 237 /* NamedExports */;
-                    case 230 /* ImportDeclaration */:
-                        return childKind !== 231 /* ImportClause */ ||
-                            (child.namedBindings && child.namedBindings.kind !== 233 /* NamedImports */);
-                    case 241 /* JsxElement */:
-                        return childKind !== 245 /* JsxClosingElement */;
+                if (node.name.kind !== 71 /* Identifier */) {
+                    return undefined;
                 }
-                // No explicit rule for given nodes so the result will follow the default value argument
-                return indentByDefault;
+                var memberElements = createClassElementsFromSymbol(initializer.symbol);
+                if (initializer.body) {
+                    memberElements.unshift(ts.createConstructor(/*decorators*/ undefined, /*modifiers*/ undefined, initializer.parameters, initializer.body));
+                }
+                return ts.createClassDeclaration(/*decorators*/ undefined, /*modifiers*/ undefined, node.name, 
+                /*typeParameters*/ undefined, /*heritageClauses*/ undefined, memberElements);
             }
-            SmartIndenter.nodeWillIndentChild = nodeWillIndentChild;
-            /*
-            Function returns true when the parent node should indent the given child by an explicit rule
-            */
-            function shouldIndentChildNode(parent, child) {
-                return nodeContentIsAlwaysIndented(parent.kind) || nodeWillIndentChild(parent, child, /*indentByDefault*/ false);
+            function createClassFromFunctionDeclaration(node) {
+                var memberElements = createClassElementsFromSymbol(ctorSymbol);
+                if (node.body) {
+                    memberElements.unshift(ts.createConstructor(/*decorators*/ undefined, /*modifiers*/ undefined, node.parameters, node.body));
+                }
+                return ts.createClassDeclaration(/*decorators*/ undefined, /*modifiers*/ undefined, node.name, 
+                /*typeParameters*/ undefined, /*heritageClauses*/ undefined, memberElements);
             }
-            SmartIndenter.shouldIndentChildNode = shouldIndentChildNode;
-        })(SmartIndenter = formatting.SmartIndenter || (formatting.SmartIndenter = {}));
-    })(formatting = ts.formatting || (ts.formatting = {}));
+        }
+    })(refactor = ts.refactor || (ts.refactor = {}));
 })(ts || (ts = {}));
+/// <reference path="convertFunctionToEs6Class.ts" />
 /// <reference path="..\compiler\program.ts"/>
 /// <reference path="..\compiler\commandLineParser.ts"/>
 /// <reference path='types.ts' />
@@ -73335,7 +89310,6 @@ var ts;
 /// <reference path='documentRegistry.ts' />
 /// <reference path='findAllReferences.ts' />
 /// <reference path='goToDefinition.ts' />
-/// <reference path='goToImplementation.ts' />
 /// <reference path='jsDoc.ts' />
 /// <reference path='jsTyping.ts' />
 /// <reference path='navigateTo.ts' />
@@ -73349,13 +89323,20 @@ var ts;
 /// <reference path='transpile.ts' />
 /// <reference path='formatting\formatting.ts' />
 /// <reference path='formatting\smartIndenter.ts' />
+/// <reference path='textChanges.ts' />
+/// <reference path='codeFixProvider.ts' />
+/// <reference path='refactorProvider.ts' />
+/// <reference path='codefixes\fixes.ts' />
+/// <reference path='refactors\refactors.ts' />
 var ts;
 (function (ts) {
     /** The version of the language service API */
     ts.servicesVersion = "0.5";
+    /* @internal */
+    var ruleProvider;
     function createNode(kind, pos, end, parent) {
-        var node = kind >= 139 /* FirstNode */ ? new NodeObject(kind, pos, end) :
-            kind === 69 /* Identifier */ ? new IdentifierObject(kind, pos, end) :
+        var node = ts.isNodeKind(kind) ? new NodeObject(kind, pos, end) :
+            kind === 71 /* Identifier */ ? new IdentifierObject(71 /* Identifier */, pos, end) :
                 new TokenObject(kind, pos, end);
         node.parent = parent;
         return node;
@@ -73366,7 +89347,6 @@ var ts;
             this.end = end;
             this.flags = 0 /* None */;
             this.transformFlags = undefined;
-            this.excludeTransformFlags = undefined;
             this.parent = undefined;
             this.kind = kind;
         }
@@ -73400,10 +89380,11 @@ var ts;
             }
             return sourceFile.text.substring(this.getStart(sourceFile), this.getEnd());
         };
-        NodeObject.prototype.addSyntheticNodes = function (nodes, pos, end, useJSDocScanner) {
+        NodeObject.prototype.addSyntheticNodes = function (nodes, pos, end) {
             ts.scanner.setTextPos(pos);
             while (pos < end) {
-                var token = useJSDocScanner ? ts.scanner.scanJSDocToken() : ts.scanner.scan();
+                var token = ts.scanner.scan();
+                ts.Debug.assert(token !== 1 /* EndOfFileToken */); // Else it would infinitely loop
                 var textPos = ts.scanner.getTextPos();
                 if (textPos <= end) {
                     nodes.push(createNode(token, pos, textPos, this));
@@ -73413,11 +89394,11 @@ var ts;
             return pos;
         };
         NodeObject.prototype.createSyntaxList = function (nodes) {
-            var list = createNode(286 /* SyntaxList */, nodes.pos, nodes.end, this);
+            var list = createNode(295 /* SyntaxList */, nodes.pos, nodes.end, this);
             list._children = [];
             var pos = nodes.pos;
-            for (var _i = 0, nodes_4 = nodes; _i < nodes_4.length; _i++) {
-                var node = nodes_4[_i];
+            for (var _i = 0, nodes_9 = nodes; _i < nodes_9.length; _i++) {
+                var node = nodes_9[_i];
                 if (pos < node.pos) {
                     pos = this.addSyntheticNodes(list._children, pos, node.pos);
                 }
@@ -73431,47 +89412,49 @@ var ts;
         };
         NodeObject.prototype.createChildren = function (sourceFile) {
             var _this = this;
-            var children;
-            if (this.kind >= 139 /* FirstNode */) {
-                ts.scanner.setText((sourceFile || this.getSourceFile()).text);
-                children = [];
-                var pos_3 = this.pos;
-                var useJSDocScanner_1 = this.kind >= 273 /* FirstJSDocTagNode */ && this.kind <= 285 /* LastJSDocTagNode */;
-                var processNode = function (node) {
-                    var isJSDocTagNode = ts.isJSDocTag(node);
-                    if (!isJSDocTagNode && pos_3 < node.pos) {
-                        pos_3 = _this.addSyntheticNodes(children, pos_3, node.pos, useJSDocScanner_1);
-                    }
-                    children.push(node);
-                    if (!isJSDocTagNode) {
-                        pos_3 = node.end;
-                    }
-                };
-                var processNodes = function (nodes) {
-                    if (pos_3 < nodes.pos) {
-                        pos_3 = _this.addSyntheticNodes(children, pos_3, nodes.pos, useJSDocScanner_1);
-                    }
-                    children.push(_this.createSyntaxList(nodes));
-                    pos_3 = nodes.end;
-                };
-                // jsDocComments need to be the first children
-                if (this.jsDocComments) {
-                    for (var _i = 0, _a = this.jsDocComments; _i < _a.length; _i++) {
-                        var jsDocComment = _a[_i];
-                        processNode(jsDocComment);
-                    }
+            if (!ts.isNodeKind(this.kind)) {
+                this._children = ts.emptyArray;
+                return;
+            }
+            if (ts.isJSDocCommentContainingNode(this)) {
+                /** Don't add trivia for "tokens" since this is in a comment. */
+                var children_3 = [];
+                this.forEachChild(function (child) { children_3.push(child); });
+                this._children = children_3;
+                return;
+            }
+            var children = [];
+            ts.scanner.setText((sourceFile || this.getSourceFile()).text);
+            var pos = this.pos;
+            var processNode = function (node) {
+                pos = _this.addSyntheticNodes(children, pos, node.pos);
+                children.push(node);
+                pos = node.end;
+            };
+            var processNodes = function (nodes) {
+                if (pos < nodes.pos) {
+                    pos = _this.addSyntheticNodes(children, pos, nodes.pos);
                 }
-                // For syntactic classifications, all trivia are classcified together, including jsdoc comments.
-                // For that to work, the jsdoc comments should still be the leading trivia of the first child.
-                // Restoring the scanner position ensures that.
-                pos_3 = this.pos;
-                ts.forEachChild(this, processNode, processNodes);
-                if (pos_3 < this.end) {
-                    this.addSyntheticNodes(children, pos_3, this.end);
+                children.push(_this.createSyntaxList(nodes));
+                pos = nodes.end;
+            };
+            // jsDocComments need to be the first children
+            if (this.jsDoc) {
+                for (var _i = 0, _a = this.jsDoc; _i < _a.length; _i++) {
+                    var jsDocComment = _a[_i];
+                    processNode(jsDocComment);
                 }
-                ts.scanner.setText(undefined);
             }
-            this._children = children || ts.emptyArray;
+            // For syntactic classifications, all trivia are classcified together, including jsdoc comments.
+            // For that to work, the jsdoc comments should still be the leading trivia of the first child.
+            // Restoring the scanner position ensures that.
+            pos = this.pos;
+            ts.forEachChild(this, processNode, processNodes);
+            if (pos < this.end) {
+                this.addSyntheticNodes(children, pos, this.end);
+            }
+            ts.scanner.setText(undefined);
+            this._children = children;
         };
         NodeObject.prototype.getChildCount = function (sourceFile) {
             if (!this._children)
@@ -73493,8 +89476,10 @@ var ts;
             if (!children.length) {
                 return undefined;
             }
-            var child = children[0];
-            return child.kind < 139 /* FirstNode */ ? child : child.getFirstToken(sourceFile);
+            var child = ts.find(children, function (kid) { return kid.kind < 267 /* FirstJSDocNode */ || kid.kind > 294 /* LastJSDocNode */; });
+            return child.kind < 143 /* FirstNode */ ?
+                child :
+                child.getFirstToken(sourceFile);
         };
         NodeObject.prototype.getLastToken = function (sourceFile) {
             var children = this.getChildren(sourceFile);
@@ -73502,7 +89487,10 @@ var ts;
             if (!child) {
                 return undefined;
             }
-            return child.kind < 139 /* FirstNode */ ? child : child.getLastToken(sourceFile);
+            return child.kind < 143 /* FirstNode */ ? child : child.getLastToken(sourceFile);
+        };
+        NodeObject.prototype.forEachChild = function (cbNode, cbNodeArray) {
+            return ts.forEachChild(this, cbNode, cbNodeArray);
         };
         return NodeObject;
     }());
@@ -73541,19 +89529,22 @@ var ts;
         TokenOrIdentifierObject.prototype.getText = function (sourceFile) {
             return (sourceFile || this.getSourceFile()).text.substring(this.getStart(), this.getEnd());
         };
-        TokenOrIdentifierObject.prototype.getChildCount = function (sourceFile) {
+        TokenOrIdentifierObject.prototype.getChildCount = function () {
             return 0;
         };
-        TokenOrIdentifierObject.prototype.getChildAt = function (index, sourceFile) {
+        TokenOrIdentifierObject.prototype.getChildAt = function () {
             return undefined;
         };
-        TokenOrIdentifierObject.prototype.getChildren = function (sourceFile) {
+        TokenOrIdentifierObject.prototype.getChildren = function () {
             return ts.emptyArray;
         };
-        TokenOrIdentifierObject.prototype.getFirstToken = function (sourceFile) {
+        TokenOrIdentifierObject.prototype.getFirstToken = function () {
+            return undefined;
+        };
+        TokenOrIdentifierObject.prototype.getLastToken = function () {
             return undefined;
         };
-        TokenOrIdentifierObject.prototype.getLastToken = function (sourceFile) {
+        TokenOrIdentifierObject.prototype.forEachChild = function () {
             return undefined;
         };
         return TokenOrIdentifierObject;
@@ -73574,28 +89565,35 @@ var ts;
         };
         SymbolObject.prototype.getDocumentationComment = function () {
             if (this.documentationComment === undefined) {
-                this.documentationComment = ts.JsDoc.getJsDocCommentsFromDeclarations(this.declarations, this.name, !(this.flags & 4 /* Property */));
+                this.documentationComment = ts.JsDoc.getJsDocCommentsFromDeclarations(this.declarations);
             }
             return this.documentationComment;
         };
+        SymbolObject.prototype.getJsDocTags = function () {
+            if (this.tags === undefined) {
+                this.tags = ts.JsDoc.getJsDocTagsFromDeclarations(this.declarations);
+            }
+            return this.tags;
+        };
         return SymbolObject;
     }());
     var TokenObject = (function (_super) {
         __extends(TokenObject, _super);
         function TokenObject(kind, pos, end) {
-            _super.call(this, pos, end);
-            this.kind = kind;
+            var _this = _super.call(this, pos, end) || this;
+            _this.kind = kind;
+            return _this;
         }
         return TokenObject;
     }(TokenOrIdentifierObject));
     var IdentifierObject = (function (_super) {
         __extends(IdentifierObject, _super);
-        function IdentifierObject(kind, pos, end) {
-            _super.call(this, pos, end);
+        function IdentifierObject(_kind, pos, end) {
+            return _super.call(this, pos, end) || this;
         }
         return IdentifierObject;
     }(TokenOrIdentifierObject));
-    IdentifierObject.prototype.kind = 69 /* Identifier */;
+    IdentifierObject.prototype.kind = 71 /* Identifier */;
     var TypeObject = (function () {
         function TypeObject(checker, flags) {
             this.checker = checker;
@@ -73629,7 +89627,7 @@ var ts;
             return this.checker.getIndexTypeOfType(this, 1 /* Number */);
         };
         TypeObject.prototype.getBaseTypes = function () {
-            return this.flags & (32768 /* Class */ | 65536 /* Interface */)
+            return this.flags & 32768 /* Object */ && this.objectFlags & (1 /* Class */ | 2 /* Interface */)
                 ? this.checker.getBaseTypes(this)
                 : undefined;
         };
@@ -73656,18 +89654,22 @@ var ts;
         };
         SignatureObject.prototype.getDocumentationComment = function () {
             if (this.documentationComment === undefined) {
-                this.documentationComment = this.declaration ? ts.JsDoc.getJsDocCommentsFromDeclarations([this.declaration], 
-                /*name*/ undefined, 
-                /*canUseParsedParamTagComments*/ false) : [];
+                this.documentationComment = this.declaration ? ts.JsDoc.getJsDocCommentsFromDeclarations([this.declaration]) : [];
             }
             return this.documentationComment;
         };
+        SignatureObject.prototype.getJsDocTags = function () {
+            if (this.jsDocTags === undefined) {
+                this.jsDocTags = this.declaration ? ts.JsDoc.getJsDocTagsFromDeclarations([this.declaration]) : [];
+            }
+            return this.jsDocTags;
+        };
         return SignatureObject;
     }());
     var SourceFileObject = (function (_super) {
         __extends(SourceFileObject, _super);
         function SourceFileObject(kind, pos, end) {
-            _super.call(this, kind, pos, end);
+            return _super.call(this, kind, pos, end) || this;
         }
         SourceFileObject.prototype.update = function (newText, textChangeRange) {
             return ts.updateSourceFile(this, newText, textChangeRange);
@@ -73681,6 +89683,20 @@ var ts;
         SourceFileObject.prototype.getPositionOfLineAndCharacter = function (line, character) {
             return ts.getPositionOfLineAndCharacter(this, line, character);
         };
+        SourceFileObject.prototype.getLineEndOfPosition = function (pos) {
+            var line = this.getLineAndCharacterOfPosition(pos).line;
+            var lineStarts = this.getLineStarts();
+            var lastCharPos;
+            if (line + 1 >= lineStarts.length) {
+                lastCharPos = this.getEnd();
+            }
+            if (!lastCharPos) {
+                lastCharPos = lineStarts[line + 1] - 1;
+            }
+            var fullText = this.getFullText();
+            // if the new line is "\r\n", we should return the last non-new-line-character position
+            return fullText[lastCharPos] === "\n" && fullText[lastCharPos - 1] === "\r" ? lastCharPos - 1 : lastCharPos;
+        };
         SourceFileObject.prototype.getNamedDeclarations = function () {
             if (!this.namedDeclarations) {
                 this.namedDeclarations = this.computeNamedDeclarations();
@@ -73688,27 +89704,32 @@ var ts;
             return this.namedDeclarations;
         };
         SourceFileObject.prototype.computeNamedDeclarations = function () {
-            var result = ts.createMap();
+            var result = ts.createMultiMap();
             ts.forEachChild(this, visit);
             return result;
             function addDeclaration(declaration) {
                 var name = getDeclarationName(declaration);
                 if (name) {
-                    ts.multiMapAdd(result, name, declaration);
+                    result.add(name, declaration);
                 }
             }
             function getDeclarations(name) {
-                return result[name] || (result[name] = []);
+                var declarations = result.get(name);
+                if (!declarations) {
+                    result.set(name, declarations = []);
+                }
+                return declarations;
             }
             function getDeclarationName(declaration) {
-                if (declaration.name) {
-                    var result_6 = getTextOfIdentifierOrLiteral(declaration.name);
-                    if (result_6 !== undefined) {
-                        return result_6;
-                    }
-                    if (declaration.name.kind === 140 /* ComputedPropertyName */) {
-                        var expr = declaration.name.expression;
-                        if (expr.kind === 172 /* PropertyAccessExpression */) {
+                var name = ts.getNameOfDeclaration(declaration);
+                if (name) {
+                    var result_8 = getTextOfIdentifierOrLiteral(name);
+                    if (result_8 !== undefined) {
+                        return result_8;
+                    }
+                    if (name.kind === 144 /* ComputedPropertyName */) {
+                        var expr = name.expression;
+                        if (expr.kind === 179 /* PropertyAccessExpression */) {
                             return expr.name.text;
                         }
                         return getTextOfIdentifierOrLiteral(expr);
@@ -73718,7 +89739,7 @@ var ts;
             }
             function getTextOfIdentifierOrLiteral(node) {
                 if (node) {
-                    if (node.kind === 69 /* Identifier */ ||
+                    if (node.kind === 71 /* Identifier */ ||
                         node.kind === 9 /* StringLiteral */ ||
                         node.kind === 8 /* NumericLiteral */) {
                         return node.text;
@@ -73728,10 +89749,10 @@ var ts;
             }
             function visit(node) {
                 switch (node.kind) {
-                    case 220 /* FunctionDeclaration */:
-                    case 179 /* FunctionExpression */:
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
+                    case 228 /* FunctionDeclaration */:
+                    case 186 /* FunctionExpression */:
+                    case 151 /* MethodDeclaration */:
+                    case 150 /* MethodSignature */:
                         var functionDeclaration = node;
                         var declarationName = getDeclarationName(functionDeclaration);
                         if (declarationName) {
@@ -73748,56 +89769,58 @@ var ts;
                             else {
                                 declarations.push(functionDeclaration);
                             }
-                            ts.forEachChild(node, visit);
                         }
+                        ts.forEachChild(node, visit);
                         break;
-                    case 221 /* ClassDeclaration */:
-                    case 192 /* ClassExpression */:
-                    case 222 /* InterfaceDeclaration */:
-                    case 223 /* TypeAliasDeclaration */:
-                    case 224 /* EnumDeclaration */:
-                    case 225 /* ModuleDeclaration */:
-                    case 229 /* ImportEqualsDeclaration */:
-                    case 238 /* ExportSpecifier */:
-                    case 234 /* ImportSpecifier */:
-                    case 229 /* ImportEqualsDeclaration */:
-                    case 231 /* ImportClause */:
-                    case 232 /* NamespaceImport */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                    case 159 /* TypeLiteral */:
+                    case 229 /* ClassDeclaration */:
+                    case 199 /* ClassExpression */:
+                    case 230 /* InterfaceDeclaration */:
+                    case 231 /* TypeAliasDeclaration */:
+                    case 232 /* EnumDeclaration */:
+                    case 233 /* ModuleDeclaration */:
+                    case 237 /* ImportEqualsDeclaration */:
+                    case 246 /* ExportSpecifier */:
+                    case 242 /* ImportSpecifier */:
+                    case 237 /* ImportEqualsDeclaration */:
+                    case 239 /* ImportClause */:
+                    case 240 /* NamespaceImport */:
+                    case 153 /* GetAccessor */:
+                    case 154 /* SetAccessor */:
+                    case 163 /* TypeLiteral */:
                         addDeclaration(node);
                         ts.forEachChild(node, visit);
                         break;
-                    case 142 /* Parameter */:
+                    case 146 /* Parameter */:
                         // Only consider parameter properties
                         if (!ts.hasModifier(node, 92 /* ParameterPropertyModifier */)) {
                             break;
                         }
-                    // fall through
-                    case 218 /* VariableDeclaration */:
-                    case 169 /* BindingElement */: {
+                    // falls through
+                    case 226 /* VariableDeclaration */:
+                    case 176 /* BindingElement */: {
                         var decl = node;
                         if (ts.isBindingPattern(decl.name)) {
                             ts.forEachChild(decl.name, visit);
                             break;
                         }
-                        if (decl.initializer)
+                        if (decl.initializer) {
                             visit(decl.initializer);
+                        }
                     }
-                    case 255 /* EnumMember */:
-                    case 145 /* PropertyDeclaration */:
-                    case 144 /* PropertySignature */:
+                    // falls through
+                    case 264 /* EnumMember */:
+                    case 149 /* PropertyDeclaration */:
+                    case 148 /* PropertySignature */:
                         addDeclaration(node);
                         break;
-                    case 236 /* ExportDeclaration */:
+                    case 244 /* ExportDeclaration */:
                         // Handle named exports case e.g.:
                         //    export {a, b as B} from "mod";
                         if (node.exportClause) {
                             ts.forEach(node.exportClause.elements, visit);
                         }
                         break;
-                    case 230 /* ImportDeclaration */:
+                    case 238 /* ImportDeclaration */:
                         var importClause = node.importClause;
                         if (importClause) {
                             // Handle default import case e.g.:
@@ -73809,7 +89832,7 @@ var ts;
                             //    import * as NS from "mod";
                             //    import {a, b as B} from "mod";
                             if (importClause.namedBindings) {
-                                if (importClause.namedBindings.kind === 232 /* NamespaceImport */) {
+                                if (importClause.namedBindings.kind === 240 /* NamespaceImport */) {
                                     addDeclaration(importClause.namedBindings);
                                 }
                                 else {
@@ -73825,6 +89848,17 @@ var ts;
         };
         return SourceFileObject;
     }(NodeObject));
+    var SourceMapSourceObject = (function () {
+        function SourceMapSourceObject(fileName, text, skipTrivia) {
+            this.fileName = fileName;
+            this.text = text;
+            this.skipTrivia = skipTrivia;
+        }
+        SourceMapSourceObject.prototype.getLineAndCharacterOfPosition = function (pos) {
+            return ts.getLineAndCharacterOfPosition(this, pos);
+        };
+        return SourceMapSourceObject;
+    }());
     function getServicesObjectAllocator() {
         return {
             getNodeConstructor: function () { return NodeObject; },
@@ -73834,6 +89868,7 @@ var ts;
             getSymbolConstructor: function () { return SymbolObject; },
             getTypeConstructor: function () { return TypeObject; },
             getSignatureConstructor: function () { return SignatureObject; },
+            getSourceMapSourceConstructor: function () { return SourceMapSourceObject; },
         };
     }
     function toEditorSettings(optionsAsMap) {
@@ -73875,13 +89910,16 @@ var ts;
         };
     }
     ts.getDefaultCompilerOptions = getDefaultCompilerOptions;
-    // Cache host information about script should be refreshed
+    function getSupportedCodeFixes() {
+        return ts.codefix.getSupportedErrorCodes();
+    }
+    ts.getSupportedCodeFixes = getSupportedCodeFixes;
+    // Cache host information about script Should be refreshed
     // at each language service public entry point, since we don't know when
-    // set of scripts handled by the host changes.
+    // the set of scripts handled by the host changes.
     var HostCache = (function () {
         function HostCache(host, getCanonicalFileName) {
             this.host = host;
-            this.getCanonicalFileName = getCanonicalFileName;
             // script id => script index
             this.currentDirectory = host.getCurrentDirectory();
             this.fileNameToEntry = ts.createFileMap();
@@ -73911,24 +89949,20 @@ var ts;
             this.fileNameToEntry.set(path, entry);
             return entry;
         };
-        HostCache.prototype.getEntry = function (path) {
+        HostCache.prototype.getEntryByPath = function (path) {
             return this.fileNameToEntry.get(path);
         };
-        HostCache.prototype.contains = function (path) {
+        HostCache.prototype.containsEntryByPath = function (path) {
             return this.fileNameToEntry.contains(path);
         };
-        HostCache.prototype.getOrCreateEntry = function (fileName) {
-            var path = ts.toPath(fileName, this.currentDirectory, this.getCanonicalFileName);
-            return this.getOrCreateEntryByPath(fileName, path);
-        };
         HostCache.prototype.getOrCreateEntryByPath = function (fileName, path) {
-            return this.contains(path)
-                ? this.getEntry(path)
+            return this.containsEntryByPath(path)
+                ? this.getEntryByPath(path)
                 : this.createEntry(fileName, path);
         };
         HostCache.prototype.getRootFileNames = function () {
             var fileNames = [];
-            this.fileNameToEntry.forEachValue(function (path, value) {
+            this.fileNameToEntry.forEachValue(function (_path, value) {
                 if (value) {
                     fileNames.push(value.hostFileName);
                 }
@@ -73936,11 +89970,11 @@ var ts;
             return fileNames;
         };
         HostCache.prototype.getVersion = function (path) {
-            var file = this.getEntry(path);
+            var file = this.getEntryByPath(path);
             return file && file.version;
         };
         HostCache.prototype.getScriptSnapshot = function (path) {
-            var file = this.getEntry(path);
+            var file = this.getEntryByPath(path);
             return file && file.scriptSnapshot;
         };
         return HostCache;
@@ -73960,7 +89994,7 @@ var ts;
             var sourceFile;
             if (this.currentFileName !== fileName) {
                 // This is a new file, just parse it
-                sourceFile = createLanguageServiceSourceFile(fileName, scriptSnapshot, 2 /* Latest */, version, /*setNodeParents*/ true, scriptKind);
+                sourceFile = createLanguageServiceSourceFile(fileName, scriptSnapshot, 5 /* Latest */, version, /*setNodeParents*/ true, scriptKind);
             }
             else if (this.currentFileVersion !== version) {
                 // This is the same file, just a newer version. Incrementally parse the file.
@@ -74054,10 +90088,40 @@ var ts;
         };
         return CancellationTokenObject;
     }());
+    /* @internal */
+    /** A cancellation that throttles calls to the host */
+    var ThrottledCancellationToken = (function () {
+        function ThrottledCancellationToken(hostCancellationToken, throttleWaitMilliseconds) {
+            if (throttleWaitMilliseconds === void 0) { throttleWaitMilliseconds = 20; }
+            this.hostCancellationToken = hostCancellationToken;
+            this.throttleWaitMilliseconds = throttleWaitMilliseconds;
+            // Store when we last tried to cancel.  Checking cancellation can be expensive (as we have
+            // to marshall over to the host layer).  So we only bother actually checking once enough
+            // time has passed.
+            this.lastCancellationCheckTime = 0;
+        }
+        ThrottledCancellationToken.prototype.isCancellationRequested = function () {
+            var time = ts.timestamp();
+            var duration = Math.abs(time - this.lastCancellationCheckTime);
+            if (duration >= this.throttleWaitMilliseconds) {
+                // Check no more than once every throttle wait milliseconds
+                this.lastCancellationCheckTime = time;
+                return this.hostCancellationToken.isCancellationRequested();
+            }
+            return false;
+        };
+        ThrottledCancellationToken.prototype.throwIfCancellationRequested = function () {
+            if (this.isCancellationRequested()) {
+                throw new ts.OperationCanceledException();
+            }
+        };
+        return ThrottledCancellationToken;
+    }());
+    ts.ThrottledCancellationToken = ThrottledCancellationToken;
     function createLanguageService(host, documentRegistry) {
         if (documentRegistry === void 0) { documentRegistry = ts.createDocumentRegistry(host.useCaseSensitiveFileNames && host.useCaseSensitiveFileNames(), host.getCurrentDirectory()); }
         var syntaxTreeCache = new SyntaxTreeCache(host);
-        var ruleProvider;
+        ruleProvider = ruleProvider || new ts.formatting.RulesProvider();
         var program;
         var lastProjectVersion;
         var lastTypesRootVersion = 0;
@@ -74082,10 +90146,6 @@ var ts;
             return sourceFile;
         }
         function getRuleProvider(options) {
-            // Ensure rules are initialized and up to date wrt to formatting options
-            if (!ruleProvider) {
-                ruleProvider = new ts.formatting.RulesProvider();
-            }
             ruleProvider.ensureUpToDate(options);
             return ruleProvider;
         }
@@ -74138,16 +90198,23 @@ var ts;
                 useCaseSensitiveFileNames: function () { return useCaseSensitivefileNames; },
                 getNewLine: function () { return ts.getNewLineOrDefaultFromHost(host); },
                 getDefaultLibFileName: function (options) { return host.getDefaultLibFileName(options); },
-                writeFile: function (fileName, data, writeByteOrderMark) { },
+                writeFile: ts.noop,
                 getCurrentDirectory: function () { return currentDirectory; },
                 fileExists: function (fileName) {
                     // stub missing host functionality
-                    return hostCache.getOrCreateEntry(fileName) !== undefined;
+                    var path = ts.toPath(fileName, currentDirectory, getCanonicalFileName);
+                    return hostCache.containsEntryByPath(path) ?
+                        !!hostCache.getEntryByPath(path) :
+                        (host.fileExists && host.fileExists(fileName));
                 },
                 readFile: function (fileName) {
                     // stub missing host functionality
-                    var entry = hostCache.getOrCreateEntry(fileName);
-                    return entry && entry.scriptSnapshot.getText(0, entry.scriptSnapshot.getLength());
+                    var path = ts.toPath(fileName, currentDirectory, getCanonicalFileName);
+                    if (hostCache.containsEntryByPath(path)) {
+                        var entry = hostCache.getEntryByPath(path);
+                        return entry && entry.scriptSnapshot.getText(0, entry.scriptSnapshot.getLength());
+                    }
+                    return host.readFile && host.readFile(fileName);
                 },
                 directoryExists: function (directoryName) {
                     return ts.directoryProbablyExists(directoryName, host);
@@ -74235,6 +90302,7 @@ var ts;
                         ts.Debug.assert(hostFileInformation.scriptKind === oldSourceFile.scriptKind, "Registered script kind (" + oldSourceFile.scriptKind + ") should match new script kind (" + hostFileInformation.scriptKind + ") for file: " + path);
                         return documentRegistry.updateDocumentWithKey(fileName, path, newSettings, documentRegistryBucketKey, hostFileInformation.scriptSnapshot, hostFileInformation.version, hostFileInformation.scriptKind);
                     }
+                    // We didn't already have the file.  Fall through and acquire it from the registry.
                 }
                 // Could not find this file in the old program, create a new SourceFile for it.
                 return documentRegistry.acquireDocumentWithKey(fileName, path, newSettings, documentRegistryBucketKey, hostFileInformation.scriptSnapshot, hostFileInformation.version, hostFileInformation.scriptKind);
@@ -74263,8 +90331,18 @@ var ts;
                         return false;
                     }
                 }
+                var currentOptions = program.getCompilerOptions();
+                var newOptions = hostCache.compilationSettings();
                 // If the compilation settings do no match, then the program is not up-to-date
-                return ts.compareDataObjects(program.getCompilerOptions(), hostCache.compilationSettings());
+                if (!ts.compareDataObjects(currentOptions, newOptions)) {
+                    return false;
+                }
+                // If everything matches but the text of config file is changed,
+                // error locations can change for program options, so update the program
+                if (currentOptions.configFile && newOptions.configFile) {
+                    return currentOptions.configFile.text === newOptions.configFile.text;
+                }
+                return true;
             }
         }
         function getProgram() {
@@ -74272,14 +90350,16 @@ var ts;
             return program;
         }
         function cleanupSemanticCache() {
-            // TODO: Should we jettison the program (or it's type checker) here?
+            program = undefined;
         }
         function dispose() {
             if (program) {
                 ts.forEach(program.getSourceFiles(), function (f) {
                     return documentRegistry.releaseDocument(f.fileName, program.getCompilerOptions());
                 });
+                program = undefined;
             }
+            host = undefined;
         }
         /// Diagnostics
         function getSyntacticDiagnostics(fileName) {
@@ -74322,7 +90402,7 @@ var ts;
         function getQuickInfoAtPosition(fileName, position) {
             synchronizeHostData();
             var sourceFile = getValidSourceFile(fileName);
-            var node = ts.getTouchingPropertyName(sourceFile, position);
+            var node = ts.getTouchingPropertyName(sourceFile, position, /*includeJsDocComment*/ true);
             if (node === sourceFile) {
                 return undefined;
             }
@@ -74334,21 +90414,22 @@ var ts;
             if (!symbol || typeChecker.isUnknownSymbol(symbol)) {
                 // Try getting just type at this position and show
                 switch (node.kind) {
-                    case 69 /* Identifier */:
-                    case 172 /* PropertyAccessExpression */:
-                    case 139 /* QualifiedName */:
-                    case 97 /* ThisKeyword */:
-                    case 165 /* ThisType */:
-                    case 95 /* SuperKeyword */:
+                    case 71 /* Identifier */:
+                    case 179 /* PropertyAccessExpression */:
+                    case 143 /* QualifiedName */:
+                    case 99 /* ThisKeyword */:
+                    case 169 /* ThisType */:
+                    case 97 /* SuperKeyword */:
                         // For the identifiers/this/super etc get the type at position
                         var type = typeChecker.getTypeAtLocation(node);
                         if (type) {
                             return {
-                                kind: ts.ScriptElementKind.unknown,
-                                kindModifiers: ts.ScriptElementKindModifier.none,
+                                kind: "" /* unknown */,
+                                kindModifiers: "" /* none */,
                                 textSpan: ts.createTextSpan(node.getStart(), node.getWidth()),
                                 displayParts: ts.typeToDisplayParts(typeChecker, type, ts.getContainerNode(node)),
-                                documentation: type.symbol ? type.symbol.getDocumentationComment() : undefined
+                                documentation: type.symbol ? type.symbol.getDocumentationComment() : undefined,
+                                tags: type.symbol ? type.symbol.getJsDocTags() : undefined
                             };
                         }
                 }
@@ -74360,7 +90441,8 @@ var ts;
                 kindModifiers: ts.SymbolDisplay.getSymbolModifiers(symbol),
                 textSpan: ts.createTextSpan(node.getStart(), node.getWidth()),
                 displayParts: displayPartsDocumentationsAndKind.displayParts,
-                documentation: displayPartsDocumentationsAndKind.documentation
+                documentation: displayPartsDocumentationsAndKind.documentation,
+                tags: displayPartsDocumentationsAndKind.tags
             };
         }
         /// Goto definition
@@ -74368,22 +90450,23 @@ var ts;
             synchronizeHostData();
             return ts.GoToDefinition.getDefinitionAtPosition(program, getValidSourceFile(fileName), position);
         }
-        /// Goto implementation
-        function getImplementationAtPosition(fileName, position) {
-            synchronizeHostData();
-            return ts.GoToImplementation.getImplementationAtPosition(program.getTypeChecker(), cancellationToken, program.getSourceFiles(), ts.getTouchingPropertyName(getValidSourceFile(fileName), position));
-        }
         function getTypeDefinitionAtPosition(fileName, position) {
             synchronizeHostData();
             return ts.GoToDefinition.getTypeDefinitionAtPosition(program.getTypeChecker(), getValidSourceFile(fileName), position);
         }
+        /// Goto implementation
+        function getImplementationAtPosition(fileName, position) {
+            synchronizeHostData();
+            return ts.FindAllReferences.getImplementationsAtPosition(program, cancellationToken, program.getSourceFiles(), getValidSourceFile(fileName), position);
+        }
+        /// References and Occurrences
         function getOccurrencesAtPosition(fileName, position) {
             var results = getOccurrencesAtPositionCore(fileName, position);
             if (results) {
-                var sourceFile_3 = getCanonicalFileName(ts.normalizeSlashes(fileName));
+                var sourceFile_2 = getCanonicalFileName(ts.normalizeSlashes(fileName));
                 // Get occurrences only supports reporting occurrences for the file queried.  So
                 // filter down to that list.
-                results = ts.filter(results, function (r) { return getCanonicalFileName(ts.normalizeSlashes(r.fileName)) === sourceFile_3; });
+                results = ts.filter(results, function (r) { return getCanonicalFileName(ts.normalizeSlashes(r.fileName)) === sourceFile_2; });
             }
             return results;
         }
@@ -74391,11 +90474,9 @@ var ts;
             synchronizeHostData();
             var sourceFilesToSearch = ts.map(filesToSearch, function (f) { return program.getSourceFile(f); });
             var sourceFile = getValidSourceFile(fileName);
-            return ts.DocumentHighlights.getDocumentHighlights(program.getTypeChecker(), cancellationToken, sourceFile, position, sourceFilesToSearch);
+            return ts.DocumentHighlights.getDocumentHighlights(program, cancellationToken, sourceFile, position, sourceFilesToSearch);
         }
-        /// References and Occurrences
         function getOccurrencesAtPositionCore(fileName, position) {
-            synchronizeHostData();
             return convertDocumentHighlights(getDocumentHighlights(fileName, position, [fileName]));
             function convertDocumentHighlights(documentHighlights) {
                 if (!documentHighlights) {
@@ -74409,8 +90490,9 @@ var ts;
                         result.push({
                             fileName: entry.fileName,
                             textSpan: highlightSpan.textSpan,
-                            isWriteAccess: highlightSpan.kind === ts.HighlightSpanKind.writtenReference,
-                            isDefinition: false
+                            isWriteAccess: highlightSpan.kind === "writtenReference" /* writtenReference */,
+                            isDefinition: false,
+                            isInString: highlightSpan.isInString,
                         });
                     }
                 }
@@ -74418,21 +90500,18 @@ var ts;
             }
         }
         function findRenameLocations(fileName, position, findInStrings, findInComments) {
-            var referencedSymbols = findReferencedSymbols(fileName, position, findInStrings, findInComments);
-            return ts.FindAllReferences.convertReferences(referencedSymbols);
+            return getReferences(fileName, position, { findInStrings: findInStrings, findInComments: findInComments, isForRename: true });
         }
         function getReferencesAtPosition(fileName, position) {
-            var referencedSymbols = findReferencedSymbols(fileName, position, /*findInStrings*/ false, /*findInComments*/ false);
-            return ts.FindAllReferences.convertReferences(referencedSymbols);
+            return getReferences(fileName, position);
         }
-        function findReferences(fileName, position) {
-            var referencedSymbols = findReferencedSymbols(fileName, position, /*findInStrings*/ false, /*findInComments*/ false);
-            // Only include referenced symbols that have a valid definition.
-            return ts.filter(referencedSymbols, function (rs) { return !!rs.definition; });
+        function getReferences(fileName, position, options) {
+            synchronizeHostData();
+            return ts.FindAllReferences.findReferencedEntries(program, cancellationToken, program.getSourceFiles(), getValidSourceFile(fileName), position, options);
         }
-        function findReferencedSymbols(fileName, position, findInStrings, findInComments) {
+        function findReferences(fileName, position) {
             synchronizeHostData();
-            return ts.FindAllReferences.findReferencedSymbols(program.getTypeChecker(), cancellationToken, program.getSourceFiles(), getValidSourceFile(fileName), position, findInStrings, findInComments);
+            return ts.FindAllReferences.findReferencedSymbols(program, cancellationToken, program.getSourceFiles(), getValidSourceFile(fileName), position);
         }
         /// NavigateTo
         function getNavigateToItems(searchValue, maxResultCount, fileName, excludeDtsFiles) {
@@ -74451,7 +90530,8 @@ var ts;
                     text: data
                 });
             }
-            var emitOutput = program.emit(sourceFile, writeFile, cancellationToken, emitOnlyDtsFiles);
+            var customTransformers = host.getCustomTransformers && host.getCustomTransformers();
+            var emitOutput = program.emit(sourceFile, writeFile, cancellationToken, emitOnlyDtsFiles, customTransformers);
             return {
                 outputFiles: outputFiles,
                 emitSkipped: emitOutput.emitSkipped
@@ -74473,24 +90553,24 @@ var ts;
         function getSourceFile(fileName) {
             return getNonBoundSourceFile(fileName);
         }
-        function getNameOrDottedNameSpan(fileName, startPos, endPos) {
+        function getNameOrDottedNameSpan(fileName, startPos, _endPos) {
             var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
             // Get node at the location
-            var node = ts.getTouchingPropertyName(sourceFile, startPos);
+            var node = ts.getTouchingPropertyName(sourceFile, startPos, /*includeJsDocComment*/ false);
             if (node === sourceFile) {
                 return;
             }
             switch (node.kind) {
-                case 172 /* PropertyAccessExpression */:
-                case 139 /* QualifiedName */:
+                case 179 /* PropertyAccessExpression */:
+                case 143 /* QualifiedName */:
                 case 9 /* StringLiteral */:
-                case 84 /* FalseKeyword */:
-                case 99 /* TrueKeyword */:
-                case 93 /* NullKeyword */:
-                case 95 /* SuperKeyword */:
-                case 97 /* ThisKeyword */:
-                case 165 /* ThisType */:
-                case 69 /* Identifier */:
+                case 86 /* FalseKeyword */:
+                case 101 /* TrueKeyword */:
+                case 95 /* NullKeyword */:
+                case 97 /* SuperKeyword */:
+                case 99 /* ThisKeyword */:
+                case 169 /* ThisType */:
+                case 71 /* Identifier */:
                     break;
                 // Cant create the text span
                 default:
@@ -74506,7 +90586,7 @@ var ts;
                     // If this is name of a module declarations, check if this is right side of dotted module name
                     // If parent of the module declaration which is parent of this node is module declaration and its body is the module declaration that this node is name of
                     // Then this name is name from dotted module
-                    if (nodeForStartPos.parent.parent.kind === 225 /* ModuleDeclaration */ &&
+                    if (nodeForStartPos.parent.parent.kind === 233 /* ModuleDeclaration */ &&
                         nodeForStartPos.parent.parent.body === nodeForStartPos.parent) {
                         // Use parent module declarations name for start pos
                         nodeForStartPos = nodeForStartPos.parent.parent.name;
@@ -74529,14 +90609,28 @@ var ts;
             return ts.BreakpointResolver.spanInSourceFileAtLocation(sourceFile, position);
         }
         function getNavigationBarItems(fileName) {
-            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            return ts.NavigationBar.getNavigationBarItems(sourceFile);
+            return ts.NavigationBar.getNavigationBarItems(syntaxTreeCache.getCurrentSourceFile(fileName), cancellationToken);
+        }
+        function getNavigationTree(fileName) {
+            return ts.NavigationBar.getNavigationTree(syntaxTreeCache.getCurrentSourceFile(fileName), cancellationToken);
+        }
+        function isTsOrTsxFile(fileName) {
+            var kind = ts.getScriptKind(fileName, host);
+            return kind === 3 /* TS */ || kind === 4 /* TSX */;
         }
         function getSemanticClassifications(fileName, span) {
+            if (!isTsOrTsxFile(fileName)) {
+                // do not run semantic classification on non-ts-or-tsx files
+                return [];
+            }
             synchronizeHostData();
             return ts.getSemanticClassifications(program.getTypeChecker(), cancellationToken, getValidSourceFile(fileName), program.getClassifiableNames(), span);
         }
         function getEncodedSemanticClassifications(fileName, span) {
+            if (!isTsOrTsxFile(fileName)) {
+                // do not run semantic classification on non-ts-or-tsx files
+                return { spans: [], endOfLineState: 0 /* None */ };
+            }
             synchronizeHostData();
             return ts.getEncodedSemanticClassifications(program.getTypeChecker(), cancellationToken, getValidSourceFile(fileName), program.getClassifiableNames(), span);
         }
@@ -74551,12 +90645,12 @@ var ts;
         function getOutliningSpans(fileName) {
             // doesn't use compiler - no need to synchronize with host
             var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            return ts.OutliningElementsCollector.collectElements(sourceFile);
+            return ts.OutliningElementsCollector.collectElements(sourceFile, cancellationToken);
         }
         function getBraceMatchingAtPosition(fileName, position) {
             var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
             var result = [];
-            var token = ts.getTouchingToken(sourceFile, position);
+            var token = ts.getTouchingToken(sourceFile, position, /*includeJsDocComment*/ false);
             if (token.getStart(sourceFile) === position) {
                 var matchKind = getMatchingTokenKind(token);
                 // Ensure that there is a corresponding token to match ours.
@@ -74583,14 +90677,14 @@ var ts;
             return result;
             function getMatchingTokenKind(token) {
                 switch (token.kind) {
-                    case 15 /* OpenBraceToken */: return 16 /* CloseBraceToken */;
-                    case 17 /* OpenParenToken */: return 18 /* CloseParenToken */;
-                    case 19 /* OpenBracketToken */: return 20 /* CloseBracketToken */;
-                    case 25 /* LessThanToken */: return 27 /* GreaterThanToken */;
-                    case 16 /* CloseBraceToken */: return 15 /* OpenBraceToken */;
-                    case 18 /* CloseParenToken */: return 17 /* OpenParenToken */;
-                    case 20 /* CloseBracketToken */: return 19 /* OpenBracketToken */;
-                    case 27 /* GreaterThanToken */: return 25 /* LessThanToken */;
+                    case 17 /* OpenBraceToken */: return 18 /* CloseBraceToken */;
+                    case 19 /* OpenParenToken */: return 20 /* CloseParenToken */;
+                    case 21 /* OpenBracketToken */: return 22 /* CloseBracketToken */;
+                    case 27 /* LessThanToken */: return 29 /* GreaterThanToken */;
+                    case 18 /* CloseBraceToken */: return 17 /* OpenBraceToken */;
+                    case 20 /* CloseParenToken */: return 19 /* OpenParenToken */;
+                    case 22 /* CloseBracketToken */: return 21 /* OpenBracketToken */;
+                    case 29 /* GreaterThanToken */: return 27 /* LessThanToken */;
                 }
                 return undefined;
             }
@@ -74629,6 +90723,31 @@ var ts;
             }
             return [];
         }
+        function getCodeFixesAtPosition(fileName, start, end, errorCodes, formatOptions) {
+            synchronizeHostData();
+            var sourceFile = getValidSourceFile(fileName);
+            var span = { start: start, length: end - start };
+            var newLineChar = ts.getNewLineOrDefaultFromHost(host);
+            var allFixes = [];
+            ts.forEach(ts.deduplicate(errorCodes), function (error) {
+                cancellationToken.throwIfCancellationRequested();
+                var context = {
+                    errorCode: error,
+                    sourceFile: sourceFile,
+                    span: span,
+                    program: program,
+                    newLineCharacter: newLineChar,
+                    host: host,
+                    cancellationToken: cancellationToken,
+                    rulesProvider: getRuleProvider(formatOptions)
+                };
+                var fixes = ts.codefix.getFixes(context);
+                if (fixes) {
+                    allFixes = allFixes.concat(fixes);
+                }
+            });
+            return allFixes;
+        }
         function getDocCommentTemplateAtPosition(fileName, position) {
             return ts.JsDoc.getDocCommentTemplateAtPosition(ts.getNewLineOrDefaultFromHost(host), syntaxTreeCache.getCurrentSourceFile(fileName), position);
         }
@@ -74644,7 +90763,7 @@ var ts;
             }
             var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
             // Check if in a context where we don't want to perform any insertion
-            if (ts.isInString(sourceFile, position) || ts.isInComment(sourceFile, position)) {
+            if (ts.isInString(sourceFile, position)) {
                 return false;
             }
             if (ts.isInsideJsxElementOrAttribute(sourceFile, position)) {
@@ -74653,6 +90772,12 @@ var ts;
             if (ts.isInTemplateString(sourceFile, position)) {
                 return false;
             }
+            switch (openingBrace) {
+                case 39 /* singleQuote */:
+                case 34 /* doubleQuote */:
+                case 96 /* backtick */:
+                    return !ts.isInComment(sourceFile, position);
+            }
             return true;
         }
         function getTodoComments(fileName, descriptors) {
@@ -74695,12 +90820,11 @@ var ts;
                     var matchPosition = matchArray.index + preamble.length;
                     // OK, we have found a match in the file.  This is only an acceptable match if
                     // it is contained within a comment.
-                    var token = ts.getTokenAtPosition(sourceFile, matchPosition);
-                    if (!ts.isInsideComment(sourceFile, token, matchPosition)) {
+                    if (!ts.isInComment(sourceFile, matchPosition)) {
                         continue;
                     }
                     var descriptor = undefined;
-                    for (var i = 0, n = descriptors.length; i < n; i++) {
+                    for (var i = 0; i < descriptors.length; i++) {
                         if (matchArray[i + firstDescriptorCaptureIndex]) {
                             descriptor = descriptors[i];
                         }
@@ -74784,6 +90908,28 @@ var ts;
             var defaultLibFileName = host.getDefaultLibFileName(host.getCompilationSettings());
             return ts.Rename.getRenameInfo(program.getTypeChecker(), defaultLibFileName, getCanonicalFileName, getValidSourceFile(fileName), position);
         }
+        function getRefactorContext(file, positionOrRange, formatOptions) {
+            var _a = typeof positionOrRange === "number" ? [positionOrRange, undefined] : [positionOrRange.pos, positionOrRange.end], startPosition = _a[0], endPosition = _a[1];
+            return {
+                file: file,
+                startPosition: startPosition,
+                endPosition: endPosition,
+                program: getProgram(),
+                newLineCharacter: host.getNewLine(),
+                rulesProvider: getRuleProvider(formatOptions),
+                cancellationToken: cancellationToken
+            };
+        }
+        function getApplicableRefactors(fileName, positionOrRange) {
+            synchronizeHostData();
+            var file = getValidSourceFile(fileName);
+            return ts.refactor.getApplicableRefactors(getRefactorContext(file, positionOrRange));
+        }
+        function getEditsForRefactor(fileName, formatOptions, positionOrRange, refactorName, actionName) {
+            synchronizeHostData();
+            var file = getValidSourceFile(fileName);
+            return ts.refactor.getEditsForRefactor(getRefactorContext(file, positionOrRange, formatOptions), refactorName, actionName);
+        }
         return {
             dispose: dispose,
             cleanupSemanticCache: cleanupSemanticCache,
@@ -74812,6 +90958,7 @@ var ts;
             getRenameInfo: getRenameInfo,
             findRenameLocations: findRenameLocations,
             getNavigationBarItems: getNavigationBarItems,
+            getNavigationTree: getNavigationTree,
             getOutliningSpans: getOutliningSpans,
             getTodoComments: getTodoComments,
             getBraceMatchingAtPosition: getBraceMatchingAtPosition,
@@ -74821,14 +90968,18 @@ var ts;
             getFormattingEditsAfterKeystroke: getFormattingEditsAfterKeystroke,
             getDocCommentTemplateAtPosition: getDocCommentTemplateAtPosition,
             isValidBraceCompletionAtPosition: isValidBraceCompletionAtPosition,
+            getCodeFixesAtPosition: getCodeFixesAtPosition,
             getEmitOutput: getEmitOutput,
             getNonBoundSourceFile: getNonBoundSourceFile,
             getSourceFile: getSourceFile,
-            getProgram: getProgram
+            getProgram: getProgram,
+            getApplicableRefactors: getApplicableRefactors,
+            getEditsForRefactor: getEditsForRefactor,
         };
     }
     ts.createLanguageService = createLanguageService;
     /* @internal */
+    /** Names in the name table are escaped, so an identifier `__foo` will have a name table entry `___foo`. */
     function getNameTable(sourceFile) {
         if (!sourceFile.nameTable) {
             initializeNameTable(sourceFile);
@@ -74842,8 +90993,8 @@ var ts;
         sourceFile.nameTable = nameTable;
         function walk(node) {
             switch (node.kind) {
-                case 69 /* Identifier */:
-                    nameTable[node.text] = nameTable[node.text] === undefined ? node.pos : -1;
+                case 71 /* Identifier */:
+                    setNameTable(node.text, node);
                     break;
                 case 9 /* StringLiteral */:
                 case 8 /* NumericLiteral */:
@@ -74852,34 +91003,95 @@ var ts;
                     // then we want 'something' to be in the name table.  Similarly, if we have
                     // "a['propname']" then we want to store "propname" in the name table.
                     if (ts.isDeclarationName(node) ||
-                        node.parent.kind === 240 /* ExternalModuleReference */ ||
+                        node.parent.kind === 248 /* ExternalModuleReference */ ||
                         isArgumentOfElementAccessExpression(node) ||
                         ts.isLiteralComputedPropertyDeclarationName(node)) {
-                        nameTable[node.text] = nameTable[node.text] === undefined ? node.pos : -1;
+                        setNameTable(node.text, node);
                     }
                     break;
                 default:
                     ts.forEachChild(node, walk);
-                    if (node.jsDocComments) {
-                        for (var _i = 0, _a = node.jsDocComments; _i < _a.length; _i++) {
-                            var jsDocComment = _a[_i];
-                            ts.forEachChild(jsDocComment, walk);
+                    if (node.jsDoc) {
+                        for (var _i = 0, _a = node.jsDoc; _i < _a.length; _i++) {
+                            var jsDoc = _a[_i];
+                            ts.forEachChild(jsDoc, walk);
                         }
                     }
             }
         }
+        function setNameTable(text, node) {
+            nameTable.set(text, nameTable.get(text) === undefined ? node.pos : -1);
+        }
+    }
+    function isObjectLiteralElement(node) {
+        switch (node.kind) {
+            case 253 /* JsxAttribute */:
+            case 255 /* JsxSpreadAttribute */:
+            case 261 /* PropertyAssignment */:
+            case 262 /* ShorthandPropertyAssignment */:
+            case 151 /* MethodDeclaration */:
+            case 153 /* GetAccessor */:
+            case 154 /* SetAccessor */:
+                return true;
+        }
+        return false;
+    }
+    /**
+     * Returns the containing object literal property declaration given a possible name node, e.g. "a" in x = { "a": 1 }
+     */
+    /* @internal */
+    function getContainingObjectLiteralElement(node) {
+        switch (node.kind) {
+            case 9 /* StringLiteral */:
+            case 8 /* NumericLiteral */:
+                if (node.parent.kind === 144 /* ComputedPropertyName */) {
+                    return isObjectLiteralElement(node.parent.parent) ? node.parent.parent : undefined;
+                }
+            // falls through
+            case 71 /* Identifier */:
+                return isObjectLiteralElement(node.parent) &&
+                    (node.parent.parent.kind === 178 /* ObjectLiteralExpression */ || node.parent.parent.kind === 254 /* JsxAttributes */) &&
+                    node.parent.name === node ? node.parent : undefined;
+        }
+        return undefined;
+    }
+    ts.getContainingObjectLiteralElement = getContainingObjectLiteralElement;
+    /* @internal */
+    function getPropertySymbolsFromContextualType(typeChecker, node) {
+        var objectLiteral = node.parent;
+        var contextualType = typeChecker.getContextualType(objectLiteral);
+        var name = ts.getTextOfPropertyName(node.name);
+        if (name && contextualType) {
+            var result_9 = [];
+            var symbol = contextualType.getProperty(name);
+            if (contextualType.flags & 65536 /* Union */) {
+                ts.forEach(contextualType.types, function (t) {
+                    var symbol = t.getProperty(name);
+                    if (symbol) {
+                        result_9.push(symbol);
+                    }
+                });
+                return result_9;
+            }
+            if (symbol) {
+                result_9.push(symbol);
+                return result_9;
+            }
+        }
+        return undefined;
     }
+    ts.getPropertySymbolsFromContextualType = getPropertySymbolsFromContextualType;
     function isArgumentOfElementAccessExpression(node) {
         return node &&
             node.parent &&
-            node.parent.kind === 173 /* ElementAccessExpression */ &&
+            node.parent.kind === 180 /* ElementAccessExpression */ &&
             node.parent.argumentExpression === node;
     }
     /**
-      * Get the path of the default library files (lib.d.ts) as distributed with the typescript
-      * node package.
-      * The functionality is not supported if the ts module is consumed outside of a node module.
-      */
+     * Get the path of the default library files (lib.d.ts) as distributed with the typescript
+     * node package.
+     * The functionality is not supported if the ts module is consumed outside of a node module.
+     */
     function getDefaultLibFilePath(options) {
         // Check __dirname is defined and that we are on a node.js system.
         if (typeof __dirname !== "undefined") {
@@ -74888,10 +91100,7 @@ var ts;
         throw new Error("getDefaultLibFilePath is only supported when consumed as a node module. ");
     }
     ts.getDefaultLibFilePath = getDefaultLibFilePath;
-    function initializeServices() {
-        ts.objectAllocator = getServicesObjectAllocator();
-    }
-    initializeServices();
+    ts.objectAllocator = getServicesObjectAllocator();
 })(ts || (ts = {}));
 // Copyright (c) Microsoft. All rights reserved. Licensed under the Apache License, Version 2.0.
 // See LICENSE.txt in the project root for complete license information.
@@ -74909,7 +91118,7 @@ var ts;
             if (sourceFile.isDeclarationFile) {
                 return undefined;
             }
-            var tokenAtLocation = ts.getTokenAtPosition(sourceFile, position);
+            var tokenAtLocation = ts.getTokenAtPosition(sourceFile, position, /*includeJsDocComment*/ false);
             var lineOfPosition = sourceFile.getLineAndCharacterOfPosition(position).line;
             if (sourceFile.getLineAndCharacterOfPosition(tokenAtLocation.getStart(sourceFile)).line > lineOfPosition) {
                 // Get previous token if the token is returned starts on new line
@@ -74956,143 +91165,144 @@ var ts;
             function spanInNode(node) {
                 if (node) {
                     switch (node.kind) {
-                        case 200 /* VariableStatement */:
+                        case 208 /* VariableStatement */:
                             // Span on first variable declaration
                             return spanInVariableDeclaration(node.declarationList.declarations[0]);
-                        case 218 /* VariableDeclaration */:
-                        case 145 /* PropertyDeclaration */:
-                        case 144 /* PropertySignature */:
+                        case 226 /* VariableDeclaration */:
+                        case 149 /* PropertyDeclaration */:
+                        case 148 /* PropertySignature */:
                             return spanInVariableDeclaration(node);
-                        case 142 /* Parameter */:
+                        case 146 /* Parameter */:
                             return spanInParameterDeclaration(node);
-                        case 220 /* FunctionDeclaration */:
-                        case 147 /* MethodDeclaration */:
-                        case 146 /* MethodSignature */:
-                        case 149 /* GetAccessor */:
-                        case 150 /* SetAccessor */:
-                        case 148 /* Constructor */:
-                        case 179 /* FunctionExpression */:
-                        case 180 /* ArrowFunction */:
+                        case 228 /* FunctionDeclaration */:
+                        case 151 /* MethodDeclaration */:
+                        case 150 /* MethodSignature */:
+                        case 153 /* GetAccessor */:
+                        case 154 /* SetAccessor */:
+                        case 152 /* Constructor */:
+                        case 186 /* FunctionExpression */:
+                        case 187 /* ArrowFunction */:
                             return spanInFunctionDeclaration(node);
-                        case 199 /* Block */:
+                        case 207 /* Block */:
                             if (ts.isFunctionBlock(node)) {
                                 return spanInFunctionBlock(node);
                             }
-                        // Fall through
-                        case 226 /* ModuleBlock */:
+                        // falls through
+                        case 234 /* ModuleBlock */:
                             return spanInBlock(node);
-                        case 252 /* CatchClause */:
+                        case 260 /* CatchClause */:
                             return spanInBlock(node.block);
-                        case 202 /* ExpressionStatement */:
+                        case 210 /* ExpressionStatement */:
                             // span on the expression
                             return textSpan(node.expression);
-                        case 211 /* ReturnStatement */:
+                        case 219 /* ReturnStatement */:
                             // span on return keyword and expression if present
                             return textSpan(node.getChildAt(0), node.expression);
-                        case 205 /* WhileStatement */:
+                        case 213 /* WhileStatement */:
                             // Span on while(...)
                             return textSpanEndingAtNextToken(node, node.expression);
-                        case 204 /* DoStatement */:
+                        case 212 /* DoStatement */:
                             // span in statement of the do statement
                             return spanInNode(node.statement);
-                        case 217 /* DebuggerStatement */:
+                        case 225 /* DebuggerStatement */:
                             // span on debugger keyword
                             return textSpan(node.getChildAt(0));
-                        case 203 /* IfStatement */:
+                        case 211 /* IfStatement */:
                             // set on if(..) span
                             return textSpanEndingAtNextToken(node, node.expression);
-                        case 214 /* LabeledStatement */:
+                        case 222 /* LabeledStatement */:
                             // span in statement
                             return spanInNode(node.statement);
-                        case 210 /* BreakStatement */:
-                        case 209 /* ContinueStatement */:
+                        case 218 /* BreakStatement */:
+                        case 217 /* ContinueStatement */:
                             // On break or continue keyword and label if present
                             return textSpan(node.getChildAt(0), node.label);
-                        case 206 /* ForStatement */:
+                        case 214 /* ForStatement */:
                             return spanInForStatement(node);
-                        case 207 /* ForInStatement */:
+                        case 215 /* ForInStatement */:
                             // span of for (a in ...)
                             return textSpanEndingAtNextToken(node, node.expression);
-                        case 208 /* ForOfStatement */:
+                        case 216 /* ForOfStatement */:
                             // span in initializer
                             return spanInInitializerOfForLike(node);
-                        case 213 /* SwitchStatement */:
+                        case 221 /* SwitchStatement */:
                             // span on switch(...)
                             return textSpanEndingAtNextToken(node, node.expression);
-                        case 249 /* CaseClause */:
-                        case 250 /* DefaultClause */:
+                        case 257 /* CaseClause */:
+                        case 258 /* DefaultClause */:
                             // span in first statement of the clause
                             return spanInNode(node.statements[0]);
-                        case 216 /* TryStatement */:
+                        case 224 /* TryStatement */:
                             // span in try block
                             return spanInBlock(node.tryBlock);
-                        case 215 /* ThrowStatement */:
+                        case 223 /* ThrowStatement */:
                             // span in throw ...
                             return textSpan(node, node.expression);
-                        case 235 /* ExportAssignment */:
+                        case 243 /* ExportAssignment */:
                             // span on export = id
                             return textSpan(node, node.expression);
-                        case 229 /* ImportEqualsDeclaration */:
+                        case 237 /* ImportEqualsDeclaration */:
                             // import statement without including semicolon
                             return textSpan(node, node.moduleReference);
-                        case 230 /* ImportDeclaration */:
+                        case 238 /* ImportDeclaration */:
                             // import statement without including semicolon
                             return textSpan(node, node.moduleSpecifier);
-                        case 236 /* ExportDeclaration */:
+                        case 244 /* ExportDeclaration */:
                             // import statement without including semicolon
                             return textSpan(node, node.moduleSpecifier);
-                        case 225 /* ModuleDeclaration */:
+                        case 233 /* ModuleDeclaration */:
                             // span on complete module if it is instantiated
                             if (ts.getModuleInstanceState(node) !== 1 /* Instantiated */) {
                                 return undefined;
                             }
-                        case 221 /* ClassDeclaration */:
-                        case 224 /* EnumDeclaration */:
-                        case 255 /* EnumMember */:
-                        case 169 /* BindingElement */:
+                        // falls through
+                        case 229 /* ClassDeclaration */:
+                        case 232 /* EnumDeclaration */:
+                        case 264 /* EnumMember */:
+                        case 176 /* BindingElement */:
                             // span on complete node
                             return textSpan(node);
-                        case 212 /* WithStatement */:
+                        case 220 /* WithStatement */:
                             // span in statement
                             return spanInNode(node.statement);
-                        case 143 /* Decorator */:
+                        case 147 /* Decorator */:
                             return spanInNodeArray(node.parent.decorators);
-                        case 167 /* ObjectBindingPattern */:
-                        case 168 /* ArrayBindingPattern */:
+                        case 174 /* ObjectBindingPattern */:
+                        case 175 /* ArrayBindingPattern */:
                             return spanInBindingPattern(node);
                         // No breakpoint in interface, type alias
-                        case 222 /* InterfaceDeclaration */:
-                        case 223 /* TypeAliasDeclaration */:
+                        case 230 /* InterfaceDeclaration */:
+                        case 231 /* TypeAliasDeclaration */:
                             return undefined;
                         // Tokens:
-                        case 23 /* SemicolonToken */:
+                        case 25 /* SemicolonToken */:
                         case 1 /* EndOfFileToken */:
                             return spanInNodeIfStartsOnSameLine(ts.findPrecedingToken(node.pos, sourceFile));
-                        case 24 /* CommaToken */:
+                        case 26 /* CommaToken */:
                             return spanInPreviousNode(node);
-                        case 15 /* OpenBraceToken */:
+                        case 17 /* OpenBraceToken */:
                             return spanInOpenBraceToken(node);
-                        case 16 /* CloseBraceToken */:
+                        case 18 /* CloseBraceToken */:
                             return spanInCloseBraceToken(node);
-                        case 20 /* CloseBracketToken */:
+                        case 22 /* CloseBracketToken */:
                             return spanInCloseBracketToken(node);
-                        case 17 /* OpenParenToken */:
+                        case 19 /* OpenParenToken */:
                             return spanInOpenParenToken(node);
-                        case 18 /* CloseParenToken */:
+                        case 20 /* CloseParenToken */:
                             return spanInCloseParenToken(node);
-                        case 54 /* ColonToken */:
+                        case 56 /* ColonToken */:
                             return spanInColonToken(node);
-                        case 27 /* GreaterThanToken */:
-                        case 25 /* LessThanToken */:
+                        case 29 /* GreaterThanToken */:
+                        case 27 /* LessThanToken */:
                             return spanInGreaterThanOrLessThanToken(node);
                         // Keywords:
-                        case 104 /* WhileKeyword */:
+                        case 106 /* WhileKeyword */:
                             return spanInWhileKeyword(node);
-                        case 80 /* ElseKeyword */:
-                        case 72 /* CatchKeyword */:
-                        case 85 /* FinallyKeyword */:
+                        case 82 /* ElseKeyword */:
+                        case 74 /* CatchKeyword */:
+                        case 87 /* FinallyKeyword */:
                             return spanInNextNode(node);
-                        case 138 /* OfKeyword */:
+                        case 142 /* OfKeyword */:
                             return spanInOfKeyword(node);
                         default:
                             // Destructuring pattern in destructuring assignment
@@ -75104,14 +91314,14 @@ var ts;
                             // Set breakpoint on identifier element of destructuring pattern
                             // a or ...c  or d: x from
                             // [a, b, ...c] or { a, b } or { d: x } from destructuring pattern
-                            if ((node.kind === 69 /* Identifier */ ||
-                                node.kind == 191 /* SpreadElementExpression */ ||
-                                node.kind === 253 /* PropertyAssignment */ ||
-                                node.kind === 254 /* ShorthandPropertyAssignment */) &&
+                            if ((node.kind === 71 /* Identifier */ ||
+                                node.kind === 198 /* SpreadElement */ ||
+                                node.kind === 261 /* PropertyAssignment */ ||
+                                node.kind === 262 /* ShorthandPropertyAssignment */) &&
                                 ts.isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent)) {
                                 return textSpan(node);
                             }
-                            if (node.kind === 187 /* BinaryExpression */) {
+                            if (node.kind === 194 /* BinaryExpression */) {
                                 var binaryExpression = node;
                                 // Set breakpoint in destructuring pattern if its destructuring assignment
                                 // [a, b, c] or {a, b, c} of
@@ -75120,7 +91330,7 @@ var ts;
                                 if (ts.isArrayLiteralOrObjectLiteralDestructuringPattern(binaryExpression.left)) {
                                     return spanInArrayLiteralOrObjectLiteralDestructuringPattern(binaryExpression.left);
                                 }
-                                if (binaryExpression.operatorToken.kind === 56 /* EqualsToken */ &&
+                                if (binaryExpression.operatorToken.kind === 58 /* EqualsToken */ &&
                                     ts.isArrayLiteralOrObjectLiteralDestructuringPattern(binaryExpression.parent)) {
                                     // Set breakpoint on assignment expression element of destructuring pattern
                                     // a = expression of
@@ -75128,28 +91338,28 @@ var ts;
                                     // { a = expression, b, c } = someExpression
                                     return textSpan(node);
                                 }
-                                if (binaryExpression.operatorToken.kind === 24 /* CommaToken */) {
+                                if (binaryExpression.operatorToken.kind === 26 /* CommaToken */) {
                                     return spanInNode(binaryExpression.left);
                                 }
                             }
                             if (ts.isPartOfExpression(node)) {
                                 switch (node.parent.kind) {
-                                    case 204 /* DoStatement */:
+                                    case 212 /* DoStatement */:
                                         // Set span as if on while keyword
                                         return spanInPreviousNode(node);
-                                    case 143 /* Decorator */:
+                                    case 147 /* Decorator */:
                                         // Set breakpoint on the decorator emit
                                         return spanInNode(node.parent);
-                                    case 206 /* ForStatement */:
-                                    case 208 /* ForOfStatement */:
+                                    case 214 /* ForStatement */:
+                                    case 216 /* ForOfStatement */:
                                         return textSpan(node);
-                                    case 187 /* BinaryExpression */:
-                                        if (node.parent.operatorToken.kind === 24 /* CommaToken */) {
+                                    case 194 /* BinaryExpression */:
+                                        if (node.parent.operatorToken.kind === 26 /* CommaToken */) {
                                             // If this is a comma expression, the breakpoint is possible in this expression
                                             return textSpan(node);
                                         }
                                         break;
-                                    case 180 /* ArrowFunction */:
+                                    case 187 /* ArrowFunction */:
                                         if (node.parent.body === node) {
                                             // If this is body of arrow function, it is allowed to have the breakpoint
                                             return textSpan(node);
@@ -75158,13 +91368,13 @@ var ts;
                                 }
                             }
                             // If this is name of property assignment, set breakpoint in the initializer
-                            if (node.parent.kind === 253 /* PropertyAssignment */ &&
+                            if (node.parent.kind === 261 /* PropertyAssignment */ &&
                                 node.parent.name === node &&
                                 !ts.isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent.parent)) {
                                 return spanInNode(node.parent.initializer);
                             }
                             // Breakpoint in type assertion goes to its operand
-                            if (node.parent.kind === 177 /* TypeAssertionExpression */ && node.parent.type === node) {
+                            if (node.parent.kind === 184 /* TypeAssertionExpression */ && node.parent.type === node) {
                                 return spanInNextNode(node.parent.type);
                             }
                             // return type of function go to previous token
@@ -75172,8 +91382,8 @@ var ts;
                                 return spanInPreviousNode(node);
                             }
                             // initializer of variable/parameter declaration go to previous node
-                            if ((node.parent.kind === 218 /* VariableDeclaration */ ||
-                                node.parent.kind === 142 /* Parameter */)) {
+                            if ((node.parent.kind === 226 /* VariableDeclaration */ ||
+                                node.parent.kind === 146 /* Parameter */)) {
                                 var paramOrVarDecl = node.parent;
                                 if (paramOrVarDecl.initializer === node ||
                                     paramOrVarDecl.type === node ||
@@ -75181,7 +91391,7 @@ var ts;
                                     return spanInPreviousNode(node);
                                 }
                             }
-                            if (node.parent.kind === 187 /* BinaryExpression */) {
+                            if (node.parent.kind === 194 /* BinaryExpression */) {
                                 var binaryExpression = node.parent;
                                 if (ts.isArrayLiteralOrObjectLiteralDestructuringPattern(binaryExpression.left) &&
                                     (binaryExpression.right === node ||
@@ -75195,8 +91405,8 @@ var ts;
                     }
                 }
                 function textSpanFromVariableDeclaration(variableDeclaration) {
-                    var declarations = variableDeclaration.parent.declarations;
-                    if (declarations && declarations[0] === variableDeclaration) {
+                    if (variableDeclaration.parent.kind === 227 /* VariableDeclarationList */ &&
+                        variableDeclaration.parent.declarations[0] === variableDeclaration) {
                         // First declaration - include let keyword
                         return textSpan(ts.findPrecedingToken(variableDeclaration.pos, sourceFile, variableDeclaration.parent), variableDeclaration);
                     }
@@ -75207,7 +91417,7 @@ var ts;
                 }
                 function spanInVariableDeclaration(variableDeclaration) {
                     // If declaration of for in statement, just set the span in parent
-                    if (variableDeclaration.parent.parent.kind === 207 /* ForInStatement */) {
+                    if (variableDeclaration.parent.parent.kind === 215 /* ForInStatement */) {
                         return spanInNode(variableDeclaration.parent.parent);
                     }
                     // If this is a destructuring pattern, set breakpoint in binding pattern
@@ -75218,11 +91428,11 @@ var ts;
                     // or its declaration from 'for of'
                     if (variableDeclaration.initializer ||
                         ts.hasModifier(variableDeclaration, 1 /* Export */) ||
-                        variableDeclaration.parent.parent.kind === 208 /* ForOfStatement */) {
+                        variableDeclaration.parent.parent.kind === 216 /* ForOfStatement */) {
                         return textSpanFromVariableDeclaration(variableDeclaration);
                     }
-                    var declarations = variableDeclaration.parent.declarations;
-                    if (declarations && declarations[0] !== variableDeclaration) {
+                    if (variableDeclaration.parent.kind === 227 /* VariableDeclarationList */ &&
+                        variableDeclaration.parent.declarations[0] !== variableDeclaration) {
                         // If we cannot set breakpoint on this declaration, set it on previous one
                         // Because the variable declaration may be binding pattern and
                         // we would like to set breakpoint in last binding element if that's the case,
@@ -75258,7 +91468,7 @@ var ts;
                 }
                 function canFunctionHaveSpanInWholeDeclaration(functionDeclaration) {
                     return ts.hasModifier(functionDeclaration, 1 /* Export */) ||
-                        (functionDeclaration.parent.kind === 221 /* ClassDeclaration */ && functionDeclaration.kind !== 148 /* Constructor */);
+                        (functionDeclaration.parent.kind === 229 /* ClassDeclaration */ && functionDeclaration.kind !== 152 /* Constructor */);
                 }
                 function spanInFunctionDeclaration(functionDeclaration) {
                     // No breakpoints in the function signature
@@ -75281,25 +91491,26 @@ var ts;
                 }
                 function spanInBlock(block) {
                     switch (block.parent.kind) {
-                        case 225 /* ModuleDeclaration */:
+                        case 233 /* ModuleDeclaration */:
                             if (ts.getModuleInstanceState(block.parent) !== 1 /* Instantiated */) {
                                 return undefined;
                             }
+                        // falls through
                         // Set on parent if on same line otherwise on first statement
-                        case 205 /* WhileStatement */:
-                        case 203 /* IfStatement */:
-                        case 207 /* ForInStatement */:
+                        case 213 /* WhileStatement */:
+                        case 211 /* IfStatement */:
+                        case 215 /* ForInStatement */:
                             return spanInNodeIfStartsOnSameLine(block.parent, block.statements[0]);
                         // Set span on previous token if it starts on same line otherwise on the first statement of the block
-                        case 206 /* ForStatement */:
-                        case 208 /* ForOfStatement */:
+                        case 214 /* ForStatement */:
+                        case 216 /* ForOfStatement */:
                             return spanInNodeIfStartsOnSameLine(ts.findPrecedingToken(block.pos, sourceFile, block.parent), block.statements[0]);
                     }
                     // Default action is to set on first statement
                     return spanInNode(block.statements[0]);
                 }
                 function spanInInitializerOfForLike(forLikeStatement) {
-                    if (forLikeStatement.initializer.kind === 219 /* VariableDeclarationList */) {
+                    if (forLikeStatement.initializer.kind === 227 /* VariableDeclarationList */) {
                         // Declaration list - set breakpoint in first declaration
                         var variableDeclarationList = forLikeStatement.initializer;
                         if (variableDeclarationList.declarations.length > 0) {
@@ -75324,23 +91535,23 @@ var ts;
                 }
                 function spanInBindingPattern(bindingPattern) {
                     // Set breakpoint in first binding element
-                    var firstBindingElement = ts.forEach(bindingPattern.elements, function (element) { return element.kind !== 193 /* OmittedExpression */ ? element : undefined; });
+                    var firstBindingElement = ts.forEach(bindingPattern.elements, function (element) { return element.kind !== 200 /* OmittedExpression */ ? element : undefined; });
                     if (firstBindingElement) {
                         return spanInNode(firstBindingElement);
                     }
                     // Empty binding pattern of binding element, set breakpoint on binding element
-                    if (bindingPattern.parent.kind === 169 /* BindingElement */) {
+                    if (bindingPattern.parent.kind === 176 /* BindingElement */) {
                         return textSpan(bindingPattern.parent);
                     }
                     // Variable declaration is used as the span
                     return textSpanFromVariableDeclaration(bindingPattern.parent);
                 }
                 function spanInArrayLiteralOrObjectLiteralDestructuringPattern(node) {
-                    ts.Debug.assert(node.kind !== 168 /* ArrayBindingPattern */ && node.kind !== 167 /* ObjectBindingPattern */);
-                    var elements = node.kind === 170 /* ArrayLiteralExpression */ ?
+                    ts.Debug.assert(node.kind !== 175 /* ArrayBindingPattern */ && node.kind !== 174 /* ObjectBindingPattern */);
+                    var elements = node.kind === 177 /* ArrayLiteralExpression */ ?
                         node.elements :
                         node.properties;
-                    var firstBindingElement = ts.forEach(elements, function (element) { return element.kind !== 193 /* OmittedExpression */ ? element : undefined; });
+                    var firstBindingElement = ts.forEach(elements, function (element) { return element.kind !== 200 /* OmittedExpression */ ? element : undefined; });
                     if (firstBindingElement) {
                         return spanInNode(firstBindingElement);
                     }
@@ -75348,18 +91559,18 @@ var ts;
                     // just nested element in another destructuring assignment
                     // set breakpoint on assignment when parent is destructuring assignment
                     // Otherwise set breakpoint for this element
-                    return textSpan(node.parent.kind === 187 /* BinaryExpression */ ? node.parent : node);
+                    return textSpan(node.parent.kind === 194 /* BinaryExpression */ ? node.parent : node);
                 }
                 // Tokens:
                 function spanInOpenBraceToken(node) {
                     switch (node.parent.kind) {
-                        case 224 /* EnumDeclaration */:
+                        case 232 /* EnumDeclaration */:
                             var enumDeclaration = node.parent;
                             return spanInNodeIfStartsOnSameLine(ts.findPrecedingToken(node.pos, sourceFile, node.parent), enumDeclaration.members.length ? enumDeclaration.members[0] : enumDeclaration.getLastToken(sourceFile));
-                        case 221 /* ClassDeclaration */:
+                        case 229 /* ClassDeclaration */:
                             var classDeclaration = node.parent;
                             return spanInNodeIfStartsOnSameLine(ts.findPrecedingToken(node.pos, sourceFile, node.parent), classDeclaration.members.length ? classDeclaration.members[0] : classDeclaration.getLastToken(sourceFile));
-                        case 227 /* CaseBlock */:
+                        case 235 /* CaseBlock */:
                             return spanInNodeIfStartsOnSameLine(node.parent.parent, node.parent.clauses[0]);
                     }
                     // Default to parent node
@@ -75367,24 +91578,25 @@ var ts;
                 }
                 function spanInCloseBraceToken(node) {
                     switch (node.parent.kind) {
-                        case 226 /* ModuleBlock */:
+                        case 234 /* ModuleBlock */:
                             // If this is not an instantiated module block, no bp span
                             if (ts.getModuleInstanceState(node.parent.parent) !== 1 /* Instantiated */) {
                                 return undefined;
                             }
-                        case 224 /* EnumDeclaration */:
-                        case 221 /* ClassDeclaration */:
+                        // falls through
+                        case 232 /* EnumDeclaration */:
+                        case 229 /* ClassDeclaration */:
                             // Span on close brace token
                             return textSpan(node);
-                        case 199 /* Block */:
+                        case 207 /* Block */:
                             if (ts.isFunctionBlock(node.parent)) {
                                 // Span on close brace token
                                 return textSpan(node);
                             }
-                        // fall through
-                        case 252 /* CatchClause */:
+                        // falls through
+                        case 260 /* CatchClause */:
                             return spanInNode(ts.lastOrUndefined(node.parent.statements));
-                        case 227 /* CaseBlock */:
+                        case 235 /* CaseBlock */:
                             // breakpoint in last statement of the last clause
                             var caseBlock = node.parent;
                             var lastClause = ts.lastOrUndefined(caseBlock.clauses);
@@ -75392,7 +91604,7 @@ var ts;
                                 return spanInNode(ts.lastOrUndefined(lastClause.statements));
                             }
                             return undefined;
-                        case 167 /* ObjectBindingPattern */:
+                        case 174 /* ObjectBindingPattern */:
                             // Breakpoint in last binding element or binding pattern if it contains no elements
                             var bindingPattern = node.parent;
                             return spanInNode(ts.lastOrUndefined(bindingPattern.elements) || bindingPattern);
@@ -75408,7 +91620,7 @@ var ts;
                 }
                 function spanInCloseBracketToken(node) {
                     switch (node.parent.kind) {
-                        case 168 /* ArrayBindingPattern */:
+                        case 175 /* ArrayBindingPattern */:
                             // Breakpoint in last binding element or binding pattern if it contains no elements
                             var bindingPattern = node.parent;
                             return textSpan(ts.lastOrUndefined(bindingPattern.elements) || bindingPattern);
@@ -75423,12 +91635,12 @@ var ts;
                     }
                 }
                 function spanInOpenParenToken(node) {
-                    if (node.parent.kind === 204 /* DoStatement */ ||
-                        node.parent.kind === 174 /* CallExpression */ ||
-                        node.parent.kind === 175 /* NewExpression */) {
+                    if (node.parent.kind === 212 /* DoStatement */ ||
+                        node.parent.kind === 181 /* CallExpression */ ||
+                        node.parent.kind === 182 /* NewExpression */) {
                         return spanInPreviousNode(node);
                     }
-                    if (node.parent.kind === 178 /* ParenthesizedExpression */) {
+                    if (node.parent.kind === 185 /* ParenthesizedExpression */) {
                         return spanInNextNode(node);
                     }
                     // Default to parent node
@@ -75437,21 +91649,21 @@ var ts;
                 function spanInCloseParenToken(node) {
                     // Is this close paren token of parameter list, set span in previous token
                     switch (node.parent.kind) {
-                        case 179 /* FunctionExpression */:
-                        case 220 /* FunctionDeclaration */:
-                        case 180 /* ArrowFunction */:
-                        case 147 /* MethodDeclaration */:
-                        case 146 /* MethodSignature */:
-                        case 149 /* GetAccessor */:
-                        case 150 /* SetAccessor */:
-                        case 148 /* Constructor */:
-                        case 205 /* WhileStatement */:
-                        case 204 /* DoStatement */:
-                        case 206 /* ForStatement */:
-                        case 208 /* ForOfStatement */:
-                        case 174 /* CallExpression */:
-                        case 175 /* NewExpression */:
-                        case 178 /* ParenthesizedExpression */:
+                        case 186 /* FunctionExpression */:
+                        case 228 /* FunctionDeclaration */:
+                        case 187 /* ArrowFunction */:
+                        case 151 /* MethodDeclaration */:
+                        case 150 /* MethodSignature */:
+                        case 153 /* GetAccessor */:
+                        case 154 /* SetAccessor */:
+                        case 152 /* Constructor */:
+                        case 213 /* WhileStatement */:
+                        case 212 /* DoStatement */:
+                        case 214 /* ForStatement */:
+                        case 216 /* ForOfStatement */:
+                        case 181 /* CallExpression */:
+                        case 182 /* NewExpression */:
+                        case 185 /* ParenthesizedExpression */:
                             return spanInPreviousNode(node);
                         // Default to parent node
                         default:
@@ -75461,20 +91673,20 @@ var ts;
                 function spanInColonToken(node) {
                     // Is this : specifying return annotation of the function declaration
                     if (ts.isFunctionLike(node.parent) ||
-                        node.parent.kind === 253 /* PropertyAssignment */ ||
-                        node.parent.kind === 142 /* Parameter */) {
+                        node.parent.kind === 261 /* PropertyAssignment */ ||
+                        node.parent.kind === 146 /* Parameter */) {
                         return spanInPreviousNode(node);
                     }
                     return spanInNode(node.parent);
                 }
                 function spanInGreaterThanOrLessThanToken(node) {
-                    if (node.parent.kind === 177 /* TypeAssertionExpression */) {
+                    if (node.parent.kind === 184 /* TypeAssertionExpression */) {
                         return spanInNextNode(node);
                     }
                     return spanInNode(node.parent);
                 }
                 function spanInWhileKeyword(node) {
-                    if (node.parent.kind === 204 /* DoStatement */) {
+                    if (node.parent.kind === 212 /* DoStatement */) {
                         // Set span on while expression
                         return textSpanEndingAtNextToken(node, node.parent.expression);
                     }
@@ -75482,7 +91694,7 @@ var ts;
                     return spanInNode(node.parent);
                 }
                 function spanInOfKeyword(node) {
-                    if (node.parent.kind === 208 /* ForOfStatement */) {
+                    if (node.parent.kind === 216 /* ForOfStatement */) {
                         // Set using next token
                         return spanInNextNode(node);
                     }
@@ -75535,8 +91747,7 @@ var ts;
         ScriptSnapshotShimAdapter.prototype.getChangeRange = function (oldSnapshot) {
             var oldSnapshotShim = oldSnapshot;
             var encoded = this.scriptSnapshotShim.getChangeRange(oldSnapshotShim.scriptSnapshotShim);
-            // TODO: should this be '==='?
-            if (encoded == null) {
+            if (encoded === null) {
                 return null;
             }
             var decoded = JSON.parse(encoded);
@@ -75564,7 +91775,7 @@ var ts;
                     var resolutionsInFile = JSON.parse(_this.shimHost.getModuleResolutionsForFile(containingFile));
                     return ts.map(moduleNames, function (name) {
                         var result = ts.getProperty(resolutionsInFile, name);
-                        return result ? { resolvedFileName: result } : undefined;
+                        return result ? { resolvedFileName: result, extension: ts.extensionFromPath(result), isExternalLibraryImport: false } : undefined;
                     });
                 };
             }
@@ -75609,11 +91820,13 @@ var ts;
         };
         LanguageServiceShimHostAdapter.prototype.getCompilationSettings = function () {
             var settingsJson = this.shimHost.getCompilationSettings();
-            // TODO: should this be '==='?
-            if (settingsJson == null || settingsJson == "") {
+            if (settingsJson === null || settingsJson === "") {
                 throw Error("LanguageServiceShimHostAdapter.getCompilationSettings: empty compilationSettings");
             }
-            return JSON.parse(settingsJson);
+            var compilerOptions = JSON.parse(settingsJson);
+            // permit language service to handle all files (filtering should be performed on the host side)
+            compilerOptions.allowNonTsExtensions = true;
+            return compilerOptions;
         };
         LanguageServiceShimHostAdapter.prototype.getScriptFileNames = function () {
             var encoded = this.shimHost.getScriptFileNames();
@@ -75636,7 +91849,7 @@ var ts;
         };
         LanguageServiceShimHostAdapter.prototype.getLocalizedDiagnosticMessages = function () {
             var diagnosticMessagesJson = this.shimHost.getLocalizedDiagnosticMessages();
-            if (diagnosticMessagesJson == null || diagnosticMessagesJson == "") {
+            if (diagnosticMessagesJson === null || diagnosticMessagesJson === "") {
                 return null;
             }
             try {
@@ -75649,7 +91862,7 @@ var ts;
         };
         LanguageServiceShimHostAdapter.prototype.getCancellationToken = function () {
             var hostCancellationToken = this.shimHost.getCancellationToken();
-            return new ThrottledCancellationToken(hostCancellationToken);
+            return new ts.ThrottledCancellationToken(hostCancellationToken);
         };
         LanguageServiceShimHostAdapter.prototype.getCurrentDirectory = function () {
             return this.shimHost.getCurrentDirectory();
@@ -75661,7 +91874,7 @@ var ts;
             return this.shimHost.getDefaultLibFileName(JSON.stringify(options));
         };
         LanguageServiceShimHostAdapter.prototype.readDirectory = function (path, extensions, exclude, include, depth) {
-            var pattern = ts.getFileMatcherPatterns(path, extensions, exclude, include, this.shimHost.useCaseSensitiveFileNames(), this.shimHost.getCurrentDirectory());
+            var pattern = ts.getFileMatcherPatterns(path, exclude, include, this.shimHost.useCaseSensitiveFileNames(), this.shimHost.getCurrentDirectory());
             return JSON.parse(this.shimHost.readDirectory(path, JSON.stringify(extensions), JSON.stringify(pattern.basePaths), pattern.excludePattern, pattern.includeFilePattern, pattern.includeDirectoryPattern, depth));
         };
         LanguageServiceShimHostAdapter.prototype.readFile = function (path, encoding) {
@@ -75673,27 +91886,6 @@ var ts;
         return LanguageServiceShimHostAdapter;
     }());
     ts.LanguageServiceShimHostAdapter = LanguageServiceShimHostAdapter;
-    /** A cancellation that throttles calls to the host */
-    var ThrottledCancellationToken = (function () {
-        function ThrottledCancellationToken(hostCancellationToken) {
-            this.hostCancellationToken = hostCancellationToken;
-            // Store when we last tried to cancel.  Checking cancellation can be expensive (as we have
-            // to marshall over to the host layer).  So we only bother actually checking once enough
-            // time has passed.
-            this.lastCancellationCheckTime = 0;
-        }
-        ThrottledCancellationToken.prototype.isCancellationRequested = function () {
-            var time = ts.timestamp();
-            var duration = Math.abs(time - this.lastCancellationCheckTime);
-            if (duration > 10) {
-                // Check no more than once every 10 ms.
-                this.lastCancellationCheckTime = time;
-                return this.hostCancellationToken.isCancellationRequested();
-            }
-            return false;
-        };
-        return ThrottledCancellationToken;
-    }());
     var CoreServicesShimHostAdapter = (function () {
         function CoreServicesShimHostAdapter(shimHost) {
             var _this = this;
@@ -75710,7 +91902,7 @@ var ts;
             // Wrap the API changes for 2.0 release. This try/catch
             // should be removed once TypeScript 2.0 has shipped.
             try {
-                var pattern = ts.getFileMatcherPatterns(rootDir, extensions, exclude, include, this.shimHost.useCaseSensitiveFileNames(), this.shimHost.getCurrentDirectory());
+                var pattern = ts.getFileMatcherPatterns(rootDir, exclude, include, this.shimHost.useCaseSensitiveFileNames(), this.shimHost.getCurrentDirectory());
                 return JSON.parse(this.shimHost.readDirectory(rootDir, JSON.stringify(extensions), JSON.stringify(pattern.basePaths), pattern.excludePattern, pattern.includeFilePattern, pattern.includeDirectoryPattern, depth));
             }
             catch (e) {
@@ -75784,7 +91976,7 @@ var ts;
             this.factory = factory;
             factory.registerShim(this);
         }
-        ShimBase.prototype.dispose = function (dummy) {
+        ShimBase.prototype.dispose = function (_dummy) {
             this.factory.unregisterShim(this);
         };
         return ShimBase;
@@ -75806,11 +91998,12 @@ var ts;
     var LanguageServiceShimObject = (function (_super) {
         __extends(LanguageServiceShimObject, _super);
         function LanguageServiceShimObject(factory, host, languageService) {
-            _super.call(this, factory);
-            this.host = host;
-            this.languageService = languageService;
-            this.logPerformance = false;
-            this.logger = this.host;
+            var _this = _super.call(this, factory) || this;
+            _this.host = host;
+            _this.languageService = languageService;
+            _this.logPerformance = false;
+            _this.logger = _this.host;
+            return _this;
         }
         LanguageServiceShimObject.prototype.forwardJSONCall = function (actionDescription, action) {
             return forwardJSONCall(this.logger, actionDescription, action, this.logPerformance);
@@ -76048,6 +92241,10 @@ var ts;
             var _this = this;
             return this.forwardJSONCall("getNavigationBarItems('" + fileName + "')", function () { return _this.languageService.getNavigationBarItems(fileName); });
         };
+        LanguageServiceShimObject.prototype.getNavigationTree = function (fileName) {
+            var _this = this;
+            return this.forwardJSONCall("getNavigationTree('" + fileName + "')", function () { return _this.languageService.getNavigationTree(fileName); });
+        };
         LanguageServiceShimObject.prototype.getOutliningSpans = function (fileName) {
             var _this = this;
             return this.forwardJSONCall("getOutliningSpans('" + fileName + "')", function () { return _this.languageService.getOutliningSpans(fileName); });
@@ -76074,10 +92271,11 @@ var ts;
     var ClassifierShimObject = (function (_super) {
         __extends(ClassifierShimObject, _super);
         function ClassifierShimObject(factory, logger) {
-            _super.call(this, factory);
-            this.logger = logger;
-            this.logPerformance = false;
-            this.classifier = ts.createClassifier();
+            var _this = _super.call(this, factory) || this;
+            _this.logger = logger;
+            _this.logPerformance = false;
+            _this.classifier = ts.createClassifier();
+            return _this;
         }
         ClassifierShimObject.prototype.getEncodedLexicalClassifications = function (text, lexState, syntacticClassifierAbsent) {
             var _this = this;
@@ -76100,10 +92298,11 @@ var ts;
     var CoreServicesShimObject = (function (_super) {
         __extends(CoreServicesShimObject, _super);
         function CoreServicesShimObject(factory, logger, host) {
-            _super.call(this, factory);
-            this.logger = logger;
-            this.host = host;
-            this.logPerformance = false;
+            var _this = _super.call(this, factory) || this;
+            _this.logger = logger;
+            _this.host = host;
+            _this.logPerformance = false;
+            return _this;
         }
         CoreServicesShimObject.prototype.forwardJSONCall = function (actionDescription, action) {
             return forwardJSONCall(this.logger, actionDescription, action, this.logPerformance);
@@ -76113,8 +92312,12 @@ var ts;
             return this.forwardJSONCall("resolveModuleName('" + fileName + "')", function () {
                 var compilerOptions = JSON.parse(compilerOptionsJson);
                 var result = ts.resolveModuleName(moduleName, ts.normalizeSlashes(fileName), compilerOptions, _this.host);
+                var resolvedFileName = result.resolvedModule ? result.resolvedModule.resolvedFileName : undefined;
+                if (result.resolvedModule && result.resolvedModule.extension !== ".ts" /* Ts */ && result.resolvedModule.extension !== ".tsx" /* Tsx */ && result.resolvedModule.extension !== ".d.ts" /* Dts */) {
+                    resolvedFileName = undefined;
+                }
                 return {
-                    resolvedFileName: result.resolvedModule ? result.resolvedModule.resolvedFileName : undefined,
+                    resolvedFileName: resolvedFileName,
                     failedLookupLocations: result.failedLookupLocations
                 };
             });
@@ -76171,24 +92374,15 @@ var ts;
             var _this = this;
             return this.forwardJSONCall("getTSConfigFileInfo('" + fileName + "')", function () {
                 var text = sourceTextSnapshot.getText(0, sourceTextSnapshot.getLength());
-                var result = ts.parseConfigFileTextToJson(fileName, text);
-                if (result.error) {
-                    return {
-                        options: {},
-                        typingOptions: {},
-                        files: [],
-                        raw: {},
-                        errors: [realizeDiagnostic(result.error, "\r\n")]
-                    };
-                }
+                var result = ts.parseJsonText(fileName, text);
                 var normalizedFileName = ts.normalizeSlashes(fileName);
-                var configFile = ts.parseJsonConfigFileContent(result.config, _this.host, ts.getDirectoryPath(normalizedFileName), /*existingOptions*/ {}, normalizedFileName);
+                var configFile = ts.parseJsonSourceFileConfigFileContent(result, _this.host, ts.getDirectoryPath(normalizedFileName), /*existingOptions*/ {}, normalizedFileName);
                 return {
                     options: configFile.options,
-                    typingOptions: configFile.typingOptions,
+                    typeAcquisition: configFile.typeAcquisition,
                     files: configFile.fileNames,
                     raw: configFile.raw,
-                    errors: realizeDiagnostics(configFile.errors, "\r\n")
+                    errors: realizeDiagnostics(result.parseDiagnostics.concat(configFile.errors), "\r\n")
                 };
             });
         };
@@ -76200,7 +92394,7 @@ var ts;
             var getCanonicalFileName = ts.createGetCanonicalFileName(/*useCaseSensitivefileNames:*/ false);
             return this.forwardJSONCall("discoverTypings()", function () {
                 var info = JSON.parse(discoverTypingsJson);
-                return ts.JsTyping.discoverTypings(_this.host, info.fileNames, ts.toPath(info.projectRootPath, info.projectRootPath, getCanonicalFileName), ts.toPath(info.safeListPath, info.safeListPath, getCanonicalFileName), info.packageNameToTypingLocation, info.typingOptions, info.compilerOptions);
+                return ts.JsTyping.discoverTypings(_this.host, info.fileNames, ts.toPath(info.projectRootPath, info.projectRootPath, getCanonicalFileName), ts.toPath(info.safeListPath, info.safeListPath, getCanonicalFileName), info.packageNameToTypingLocation, info.typeAcquisition, info.unresolvedImports);
             });
         };
         return CoreServicesShimObject;
@@ -76257,7 +92451,7 @@ var ts;
             this._shims.push(shim);
         };
         TypeScriptServicesFactory.prototype.unregisterShim = function (shim) {
-            for (var i = 0, n = this._shims.length; i < n; i++) {
+            for (var i = 0; i < this._shims.length; i++) {
                 if (this._shims[i] === shim) {
                     delete this._shims[i];
                     return;
@@ -76283,12 +92477,10 @@ var TypeScript;
         Services.TypeScriptServicesFactory = ts.TypeScriptServicesFactory;
     })(Services = TypeScript.Services || (TypeScript.Services = {}));
 })(TypeScript || (TypeScript = {}));
-/* tslint:disable:no-unused-variable */
 // 'toolsVersion' gets consumed by the managed side, so it's not unused.
 // TODO: it should be moved into a namespace though.
 /* @internal */
-var toolsVersion = "2.1";
-/* tslint:enable:no-unused-variable */
+var toolsVersion = "2.5";
 /**
  * Sample: add a new utility function
  */
diff --git a/bin/typescript.d.ts b/bin/typescript.d.ts
index 6abb935..4c674e2 100644
--- a/bin/typescript.d.ts
+++ b/bin/typescript.d.ts
@@ -1,9 +1,34 @@
 declare namespace ts {
+    /**
+     * Type of objects whose values are all of the same type.
+     * The `in` and `for-in` operators can *not* be safely used,
+     * since `Object.prototype` may be modified by outside code.
+     */
     interface MapLike<T> {
         [index: string]: T;
     }
-    interface Map<T> extends MapLike<T> {
-        __mapBrand: any;
+    /** ES6 Map interface. */
+    interface Map<T> {
+        get(key: string): T | undefined;
+        has(key: string): boolean;
+        set(key: string, value: T): this;
+        delete(key: string): boolean;
+        clear(): void;
+        forEach(action: (value: T, key: string) => void): void;
+        readonly size: number;
+        keys(): Iterator<string>;
+        values(): Iterator<T>;
+        entries(): Iterator<[string, T]>;
+    }
+    /** ES6 Iterator type. */
+    interface Iterator<T> {
+        next(): {
+            value: T;
+            done: false;
+        } | {
+            value: never;
+            done: true;
+        };
     }
     type Path = string & {
         __pathBrand: any;
@@ -32,315 +57,327 @@ declare namespace ts {
         ConflictMarkerTrivia = 7,
         NumericLiteral = 8,
         StringLiteral = 9,
-        RegularExpressionLiteral = 10,
-        NoSubstitutionTemplateLiteral = 11,
-        TemplateHead = 12,
-        TemplateMiddle = 13,
-        TemplateTail = 14,
-        OpenBraceToken = 15,
-        CloseBraceToken = 16,
-        OpenParenToken = 17,
-        CloseParenToken = 18,
-        OpenBracketToken = 19,
-        CloseBracketToken = 20,
-        DotToken = 21,
-        DotDotDotToken = 22,
-        SemicolonToken = 23,
-        CommaToken = 24,
-        LessThanToken = 25,
-        LessThanSlashToken = 26,
-        GreaterThanToken = 27,
-        LessThanEqualsToken = 28,
-        GreaterThanEqualsToken = 29,
-        EqualsEqualsToken = 30,
-        ExclamationEqualsToken = 31,
-        EqualsEqualsEqualsToken = 32,
-        ExclamationEqualsEqualsToken = 33,
-        EqualsGreaterThanToken = 34,
-        PlusToken = 35,
-        MinusToken = 36,
-        AsteriskToken = 37,
-        AsteriskAsteriskToken = 38,
-        SlashToken = 39,
-        PercentToken = 40,
-        PlusPlusToken = 41,
-        MinusMinusToken = 42,
-        LessThanLessThanToken = 43,
-        GreaterThanGreaterThanToken = 44,
-        GreaterThanGreaterThanGreaterThanToken = 45,
-        AmpersandToken = 46,
-        BarToken = 47,
-        CaretToken = 48,
-        ExclamationToken = 49,
-        TildeToken = 50,
-        AmpersandAmpersandToken = 51,
-        BarBarToken = 52,
-        QuestionToken = 53,
-        ColonToken = 54,
-        AtToken = 55,
-        EqualsToken = 56,
-        PlusEqualsToken = 57,
-        MinusEqualsToken = 58,
-        AsteriskEqualsToken = 59,
-        AsteriskAsteriskEqualsToken = 60,
-        SlashEqualsToken = 61,
-        PercentEqualsToken = 62,
-        LessThanLessThanEqualsToken = 63,
-        GreaterThanGreaterThanEqualsToken = 64,
-        GreaterThanGreaterThanGreaterThanEqualsToken = 65,
-        AmpersandEqualsToken = 66,
-        BarEqualsToken = 67,
-        CaretEqualsToken = 68,
-        Identifier = 69,
-        BreakKeyword = 70,
-        CaseKeyword = 71,
-        CatchKeyword = 72,
-        ClassKeyword = 73,
-        ConstKeyword = 74,
-        ContinueKeyword = 75,
-        DebuggerKeyword = 76,
-        DefaultKeyword = 77,
-        DeleteKeyword = 78,
-        DoKeyword = 79,
-        ElseKeyword = 80,
-        EnumKeyword = 81,
-        ExportKeyword = 82,
-        ExtendsKeyword = 83,
-        FalseKeyword = 84,
-        FinallyKeyword = 85,
-        ForKeyword = 86,
-        FunctionKeyword = 87,
-        IfKeyword = 88,
-        ImportKeyword = 89,
-        InKeyword = 90,
-        InstanceOfKeyword = 91,
-        NewKeyword = 92,
-        NullKeyword = 93,
-        ReturnKeyword = 94,
-        SuperKeyword = 95,
-        SwitchKeyword = 96,
-        ThisKeyword = 97,
-        ThrowKeyword = 98,
-        TrueKeyword = 99,
-        TryKeyword = 100,
-        TypeOfKeyword = 101,
-        VarKeyword = 102,
-        VoidKeyword = 103,
-        WhileKeyword = 104,
-        WithKeyword = 105,
-        ImplementsKeyword = 106,
-        InterfaceKeyword = 107,
-        LetKeyword = 108,
-        PackageKeyword = 109,
-        PrivateKeyword = 110,
-        ProtectedKeyword = 111,
-        PublicKeyword = 112,
-        StaticKeyword = 113,
-        YieldKeyword = 114,
-        AbstractKeyword = 115,
-        AsKeyword = 116,
-        AnyKeyword = 117,
-        AsyncKeyword = 118,
-        AwaitKeyword = 119,
-        BooleanKeyword = 120,
-        ConstructorKeyword = 121,
-        DeclareKeyword = 122,
-        GetKeyword = 123,
-        IsKeyword = 124,
-        ModuleKeyword = 125,
-        NamespaceKeyword = 126,
-        NeverKeyword = 127,
-        ReadonlyKeyword = 128,
-        RequireKeyword = 129,
-        NumberKeyword = 130,
-        SetKeyword = 131,
-        StringKeyword = 132,
-        SymbolKeyword = 133,
-        TypeKeyword = 134,
-        UndefinedKeyword = 135,
-        FromKeyword = 136,
-        GlobalKeyword = 137,
-        OfKeyword = 138,
-        QualifiedName = 139,
-        ComputedPropertyName = 140,
-        TypeParameter = 141,
-        Parameter = 142,
-        Decorator = 143,
-        PropertySignature = 144,
-        PropertyDeclaration = 145,
-        MethodSignature = 146,
-        MethodDeclaration = 147,
-        Constructor = 148,
-        GetAccessor = 149,
-        SetAccessor = 150,
-        CallSignature = 151,
-        ConstructSignature = 152,
-        IndexSignature = 153,
-        TypePredicate = 154,
-        TypeReference = 155,
-        FunctionType = 156,
-        ConstructorType = 157,
-        TypeQuery = 158,
-        TypeLiteral = 159,
-        ArrayType = 160,
-        TupleType = 161,
-        UnionType = 162,
-        IntersectionType = 163,
-        ParenthesizedType = 164,
-        ThisType = 165,
-        LiteralType = 166,
-        ObjectBindingPattern = 167,
-        ArrayBindingPattern = 168,
-        BindingElement = 169,
-        ArrayLiteralExpression = 170,
-        ObjectLiteralExpression = 171,
-        PropertyAccessExpression = 172,
-        ElementAccessExpression = 173,
-        CallExpression = 174,
-        NewExpression = 175,
-        TaggedTemplateExpression = 176,
-        TypeAssertionExpression = 177,
-        ParenthesizedExpression = 178,
-        FunctionExpression = 179,
-        ArrowFunction = 180,
-        DeleteExpression = 181,
-        TypeOfExpression = 182,
-        VoidExpression = 183,
-        AwaitExpression = 184,
-        PrefixUnaryExpression = 185,
-        PostfixUnaryExpression = 186,
-        BinaryExpression = 187,
-        ConditionalExpression = 188,
-        TemplateExpression = 189,
-        YieldExpression = 190,
-        SpreadElementExpression = 191,
-        ClassExpression = 192,
-        OmittedExpression = 193,
-        ExpressionWithTypeArguments = 194,
-        AsExpression = 195,
-        NonNullExpression = 196,
-        TemplateSpan = 197,
-        SemicolonClassElement = 198,
-        Block = 199,
-        VariableStatement = 200,
-        EmptyStatement = 201,
-        ExpressionStatement = 202,
-        IfStatement = 203,
-        DoStatement = 204,
-        WhileStatement = 205,
-        ForStatement = 206,
-        ForInStatement = 207,
-        ForOfStatement = 208,
-        ContinueStatement = 209,
-        BreakStatement = 210,
-        ReturnStatement = 211,
-        WithStatement = 212,
-        SwitchStatement = 213,
-        LabeledStatement = 214,
-        ThrowStatement = 215,
-        TryStatement = 216,
-        DebuggerStatement = 217,
-        VariableDeclaration = 218,
-        VariableDeclarationList = 219,
-        FunctionDeclaration = 220,
-        ClassDeclaration = 221,
-        InterfaceDeclaration = 222,
-        TypeAliasDeclaration = 223,
-        EnumDeclaration = 224,
-        ModuleDeclaration = 225,
-        ModuleBlock = 226,
-        CaseBlock = 227,
-        NamespaceExportDeclaration = 228,
-        ImportEqualsDeclaration = 229,
-        ImportDeclaration = 230,
-        ImportClause = 231,
-        NamespaceImport = 232,
-        NamedImports = 233,
-        ImportSpecifier = 234,
-        ExportAssignment = 235,
-        ExportDeclaration = 236,
-        NamedExports = 237,
-        ExportSpecifier = 238,
-        MissingDeclaration = 239,
-        ExternalModuleReference = 240,
-        JsxElement = 241,
-        JsxSelfClosingElement = 242,
-        JsxOpeningElement = 243,
-        JsxText = 244,
-        JsxClosingElement = 245,
-        JsxAttribute = 246,
-        JsxSpreadAttribute = 247,
-        JsxExpression = 248,
-        CaseClause = 249,
-        DefaultClause = 250,
-        HeritageClause = 251,
-        CatchClause = 252,
-        PropertyAssignment = 253,
-        ShorthandPropertyAssignment = 254,
-        EnumMember = 255,
-        SourceFile = 256,
-        JSDocTypeExpression = 257,
-        JSDocAllType = 258,
-        JSDocUnknownType = 259,
-        JSDocArrayType = 260,
-        JSDocUnionType = 261,
-        JSDocTupleType = 262,
-        JSDocNullableType = 263,
-        JSDocNonNullableType = 264,
-        JSDocRecordType = 265,
-        JSDocRecordMember = 266,
-        JSDocTypeReference = 267,
-        JSDocOptionalType = 268,
-        JSDocFunctionType = 269,
-        JSDocVariadicType = 270,
-        JSDocConstructorType = 271,
-        JSDocThisType = 272,
-        JSDocComment = 273,
-        JSDocTag = 274,
-        JSDocParameterTag = 275,
-        JSDocReturnTag = 276,
-        JSDocTypeTag = 277,
-        JSDocTemplateTag = 278,
-        JSDocTypedefTag = 279,
-        JSDocPropertyTag = 280,
-        JSDocTypeLiteral = 281,
-        JSDocLiteralType = 282,
-        JSDocNullKeyword = 283,
-        JSDocUndefinedKeyword = 284,
-        JSDocNeverKeyword = 285,
-        SyntaxList = 286,
-        NotEmittedStatement = 287,
-        PartiallyEmittedExpression = 288,
-        Count = 289,
-        FirstAssignment = 56,
-        LastAssignment = 68,
-        FirstCompoundAssignment = 57,
-        LastCompoundAssignment = 68,
-        FirstReservedWord = 70,
-        LastReservedWord = 105,
-        FirstKeyword = 70,
-        LastKeyword = 138,
-        FirstFutureReservedWord = 106,
-        LastFutureReservedWord = 114,
-        FirstTypeNode = 154,
-        LastTypeNode = 166,
-        FirstPunctuation = 15,
-        LastPunctuation = 68,
+        JsxText = 10,
+        JsxTextAllWhiteSpaces = 11,
+        RegularExpressionLiteral = 12,
+        NoSubstitutionTemplateLiteral = 13,
+        TemplateHead = 14,
+        TemplateMiddle = 15,
+        TemplateTail = 16,
+        OpenBraceToken = 17,
+        CloseBraceToken = 18,
+        OpenParenToken = 19,
+        CloseParenToken = 20,
+        OpenBracketToken = 21,
+        CloseBracketToken = 22,
+        DotToken = 23,
+        DotDotDotToken = 24,
+        SemicolonToken = 25,
+        CommaToken = 26,
+        LessThanToken = 27,
+        LessThanSlashToken = 28,
+        GreaterThanToken = 29,
+        LessThanEqualsToken = 30,
+        GreaterThanEqualsToken = 31,
+        EqualsEqualsToken = 32,
+        ExclamationEqualsToken = 33,
+        EqualsEqualsEqualsToken = 34,
+        ExclamationEqualsEqualsToken = 35,
+        EqualsGreaterThanToken = 36,
+        PlusToken = 37,
+        MinusToken = 38,
+        AsteriskToken = 39,
+        AsteriskAsteriskToken = 40,
+        SlashToken = 41,
+        PercentToken = 42,
+        PlusPlusToken = 43,
+        MinusMinusToken = 44,
+        LessThanLessThanToken = 45,
+        GreaterThanGreaterThanToken = 46,
+        GreaterThanGreaterThanGreaterThanToken = 47,
+        AmpersandToken = 48,
+        BarToken = 49,
+        CaretToken = 50,
+        ExclamationToken = 51,
+        TildeToken = 52,
+        AmpersandAmpersandToken = 53,
+        BarBarToken = 54,
+        QuestionToken = 55,
+        ColonToken = 56,
+        AtToken = 57,
+        EqualsToken = 58,
+        PlusEqualsToken = 59,
+        MinusEqualsToken = 60,
+        AsteriskEqualsToken = 61,
+        AsteriskAsteriskEqualsToken = 62,
+        SlashEqualsToken = 63,
+        PercentEqualsToken = 64,
+        LessThanLessThanEqualsToken = 65,
+        GreaterThanGreaterThanEqualsToken = 66,
+        GreaterThanGreaterThanGreaterThanEqualsToken = 67,
+        AmpersandEqualsToken = 68,
+        BarEqualsToken = 69,
+        CaretEqualsToken = 70,
+        Identifier = 71,
+        BreakKeyword = 72,
+        CaseKeyword = 73,
+        CatchKeyword = 74,
+        ClassKeyword = 75,
+        ConstKeyword = 76,
+        ContinueKeyword = 77,
+        DebuggerKeyword = 78,
+        DefaultKeyword = 79,
+        DeleteKeyword = 80,
+        DoKeyword = 81,
+        ElseKeyword = 82,
+        EnumKeyword = 83,
+        ExportKeyword = 84,
+        ExtendsKeyword = 85,
+        FalseKeyword = 86,
+        FinallyKeyword = 87,
+        ForKeyword = 88,
+        FunctionKeyword = 89,
+        IfKeyword = 90,
+        ImportKeyword = 91,
+        InKeyword = 92,
+        InstanceOfKeyword = 93,
+        NewKeyword = 94,
+        NullKeyword = 95,
+        ReturnKeyword = 96,
+        SuperKeyword = 97,
+        SwitchKeyword = 98,
+        ThisKeyword = 99,
+        ThrowKeyword = 100,
+        TrueKeyword = 101,
+        TryKeyword = 102,
+        TypeOfKeyword = 103,
+        VarKeyword = 104,
+        VoidKeyword = 105,
+        WhileKeyword = 106,
+        WithKeyword = 107,
+        ImplementsKeyword = 108,
+        InterfaceKeyword = 109,
+        LetKeyword = 110,
+        PackageKeyword = 111,
+        PrivateKeyword = 112,
+        ProtectedKeyword = 113,
+        PublicKeyword = 114,
+        StaticKeyword = 115,
+        YieldKeyword = 116,
+        AbstractKeyword = 117,
+        AsKeyword = 118,
+        AnyKeyword = 119,
+        AsyncKeyword = 120,
+        AwaitKeyword = 121,
+        BooleanKeyword = 122,
+        ConstructorKeyword = 123,
+        DeclareKeyword = 124,
+        GetKeyword = 125,
+        IsKeyword = 126,
+        KeyOfKeyword = 127,
+        ModuleKeyword = 128,
+        NamespaceKeyword = 129,
+        NeverKeyword = 130,
+        ReadonlyKeyword = 131,
+        RequireKeyword = 132,
+        NumberKeyword = 133,
+        ObjectKeyword = 134,
+        SetKeyword = 135,
+        StringKeyword = 136,
+        SymbolKeyword = 137,
+        TypeKeyword = 138,
+        UndefinedKeyword = 139,
+        FromKeyword = 140,
+        GlobalKeyword = 141,
+        OfKeyword = 142,
+        QualifiedName = 143,
+        ComputedPropertyName = 144,
+        TypeParameter = 145,
+        Parameter = 146,
+        Decorator = 147,
+        PropertySignature = 148,
+        PropertyDeclaration = 149,
+        MethodSignature = 150,
+        MethodDeclaration = 151,
+        Constructor = 152,
+        GetAccessor = 153,
+        SetAccessor = 154,
+        CallSignature = 155,
+        ConstructSignature = 156,
+        IndexSignature = 157,
+        TypePredicate = 158,
+        TypeReference = 159,
+        FunctionType = 160,
+        ConstructorType = 161,
+        TypeQuery = 162,
+        TypeLiteral = 163,
+        ArrayType = 164,
+        TupleType = 165,
+        UnionType = 166,
+        IntersectionType = 167,
+        ParenthesizedType = 168,
+        ThisType = 169,
+        TypeOperator = 170,
+        IndexedAccessType = 171,
+        MappedType = 172,
+        LiteralType = 173,
+        ObjectBindingPattern = 174,
+        ArrayBindingPattern = 175,
+        BindingElement = 176,
+        ArrayLiteralExpression = 177,
+        ObjectLiteralExpression = 178,
+        PropertyAccessExpression = 179,
+        ElementAccessExpression = 180,
+        CallExpression = 181,
+        NewExpression = 182,
+        TaggedTemplateExpression = 183,
+        TypeAssertionExpression = 184,
+        ParenthesizedExpression = 185,
+        FunctionExpression = 186,
+        ArrowFunction = 187,
+        DeleteExpression = 188,
+        TypeOfExpression = 189,
+        VoidExpression = 190,
+        AwaitExpression = 191,
+        PrefixUnaryExpression = 192,
+        PostfixUnaryExpression = 193,
+        BinaryExpression = 194,
+        ConditionalExpression = 195,
+        TemplateExpression = 196,
+        YieldExpression = 197,
+        SpreadElement = 198,
+        ClassExpression = 199,
+        OmittedExpression = 200,
+        ExpressionWithTypeArguments = 201,
+        AsExpression = 202,
+        NonNullExpression = 203,
+        MetaProperty = 204,
+        TemplateSpan = 205,
+        SemicolonClassElement = 206,
+        Block = 207,
+        VariableStatement = 208,
+        EmptyStatement = 209,
+        ExpressionStatement = 210,
+        IfStatement = 211,
+        DoStatement = 212,
+        WhileStatement = 213,
+        ForStatement = 214,
+        ForInStatement = 215,
+        ForOfStatement = 216,
+        ContinueStatement = 217,
+        BreakStatement = 218,
+        ReturnStatement = 219,
+        WithStatement = 220,
+        SwitchStatement = 221,
+        LabeledStatement = 222,
+        ThrowStatement = 223,
+        TryStatement = 224,
+        DebuggerStatement = 225,
+        VariableDeclaration = 226,
+        VariableDeclarationList = 227,
+        FunctionDeclaration = 228,
+        ClassDeclaration = 229,
+        InterfaceDeclaration = 230,
+        TypeAliasDeclaration = 231,
+        EnumDeclaration = 232,
+        ModuleDeclaration = 233,
+        ModuleBlock = 234,
+        CaseBlock = 235,
+        NamespaceExportDeclaration = 236,
+        ImportEqualsDeclaration = 237,
+        ImportDeclaration = 238,
+        ImportClause = 239,
+        NamespaceImport = 240,
+        NamedImports = 241,
+        ImportSpecifier = 242,
+        ExportAssignment = 243,
+        ExportDeclaration = 244,
+        NamedExports = 245,
+        ExportSpecifier = 246,
+        MissingDeclaration = 247,
+        ExternalModuleReference = 248,
+        JsxElement = 249,
+        JsxSelfClosingElement = 250,
+        JsxOpeningElement = 251,
+        JsxClosingElement = 252,
+        JsxAttribute = 253,
+        JsxAttributes = 254,
+        JsxSpreadAttribute = 255,
+        JsxExpression = 256,
+        CaseClause = 257,
+        DefaultClause = 258,
+        HeritageClause = 259,
+        CatchClause = 260,
+        PropertyAssignment = 261,
+        ShorthandPropertyAssignment = 262,
+        SpreadAssignment = 263,
+        EnumMember = 264,
+        SourceFile = 265,
+        Bundle = 266,
+        JSDocTypeExpression = 267,
+        JSDocAllType = 268,
+        JSDocUnknownType = 269,
+        JSDocArrayType = 270,
+        JSDocUnionType = 271,
+        JSDocTupleType = 272,
+        JSDocNullableType = 273,
+        JSDocNonNullableType = 274,
+        JSDocRecordType = 275,
+        JSDocRecordMember = 276,
+        JSDocTypeReference = 277,
+        JSDocOptionalType = 278,
+        JSDocFunctionType = 279,
+        JSDocVariadicType = 280,
+        JSDocConstructorType = 281,
+        JSDocThisType = 282,
+        JSDocComment = 283,
+        JSDocTag = 284,
+        JSDocAugmentsTag = 285,
+        JSDocClassTag = 286,
+        JSDocParameterTag = 287,
+        JSDocReturnTag = 288,
+        JSDocTypeTag = 289,
+        JSDocTemplateTag = 290,
+        JSDocTypedefTag = 291,
+        JSDocPropertyTag = 292,
+        JSDocTypeLiteral = 293,
+        JSDocLiteralType = 294,
+        SyntaxList = 295,
+        NotEmittedStatement = 296,
+        PartiallyEmittedExpression = 297,
+        CommaListExpression = 298,
+        MergeDeclarationMarker = 299,
+        EndOfDeclarationMarker = 300,
+        Count = 301,
+        FirstAssignment = 58,
+        LastAssignment = 70,
+        FirstCompoundAssignment = 59,
+        LastCompoundAssignment = 70,
+        FirstReservedWord = 72,
+        LastReservedWord = 107,
+        FirstKeyword = 72,
+        LastKeyword = 142,
+        FirstFutureReservedWord = 108,
+        LastFutureReservedWord = 116,
+        FirstTypeNode = 158,
+        LastTypeNode = 173,
+        FirstPunctuation = 17,
+        LastPunctuation = 70,
         FirstToken = 0,
-        LastToken = 138,
+        LastToken = 142,
         FirstTriviaToken = 2,
         LastTriviaToken = 7,
         FirstLiteralToken = 8,
-        LastLiteralToken = 11,
-        FirstTemplateToken = 11,
-        LastTemplateToken = 14,
-        FirstBinaryOperator = 25,
-        LastBinaryOperator = 68,
-        FirstNode = 139,
-        FirstJSDocNode = 257,
-        LastJSDocNode = 282,
-        FirstJSDocTagNode = 273,
-        LastJSDocTagNode = 285,
+        LastLiteralToken = 13,
+        FirstTemplateToken = 13,
+        LastTemplateToken = 16,
+        FirstBinaryOperator = 27,
+        LastBinaryOperator = 70,
+        FirstNode = 143,
+        FirstJSDocNode = 267,
+        LastJSDocNode = 294,
+        FirstJSDocTagNode = 284,
+        LastJSDocTagNode = 294,
     }
     const enum NodeFlags {
         None = 0,
@@ -354,27 +391,22 @@ declare namespace ts {
         HasImplicitReturn = 128,
         HasExplicitReturn = 256,
         GlobalAugmentation = 512,
-        HasClassExtends = 1024,
-        HasDecorators = 2048,
-        HasParamDecorators = 4096,
-        HasAsyncFunctions = 8192,
-        HasJsxSpreadAttributes = 16384,
-        DisallowInContext = 32768,
-        YieldContext = 65536,
-        DecoratorContext = 131072,
-        AwaitContext = 262144,
-        ThisNodeHasError = 524288,
-        JavaScriptFile = 1048576,
-        ThisNodeOrAnySubNodesHasError = 2097152,
-        HasAggregatedChildData = 4194304,
+        HasAsyncFunctions = 1024,
+        DisallowInContext = 2048,
+        YieldContext = 4096,
+        DecoratorContext = 8192,
+        AwaitContext = 16384,
+        ThisNodeHasError = 32768,
+        JavaScriptFile = 65536,
+        ThisNodeOrAnySubNodesHasError = 131072,
+        HasAggregatedChildData = 262144,
+        PossiblyContainsDynamicImport = 524288,
         BlockScoped = 3,
         ReachabilityCheckFlags = 384,
-        EmitHelperFlags = 31744,
-        ReachabilityAndEmitFlags = 32128,
-        ContextFlags = 1540096,
-        TypeExcludesFlags = 327680,
+        ReachabilityAndEmitFlags = 1408,
+        ContextFlags = 96256,
+        TypeExcludesFlags = 20480,
     }
-    type ModifiersArray = NodeArray<Modifier>;
     const enum ModifierFlags {
         None = 0,
         Export = 1,
@@ -392,6 +424,8 @@ declare namespace ts {
         AccessibilityModifier = 28,
         ParameterPropertyModifier = 92,
         NonPublicAccessibilityModifier = 24,
+        TypeScriptModifier = 2270,
+        ExportDefault = 513,
     }
     const enum JsxFlags {
         None = 0,
@@ -417,22 +451,36 @@ declare namespace ts {
         parent?: Node;
         original?: Node;
         startsOnNewLine?: boolean;
-        jsDocComments?: JSDoc[];
+        jsDoc?: JSDoc[];
+        jsDocCache?: (JSDoc | JSDocTag)[];
         symbol?: Symbol;
         locals?: SymbolTable;
         nextContainer?: Node;
         localSymbol?: Symbol;
         flowNode?: FlowNode;
         emitNode?: EmitNode;
+        contextualType?: Type;
+        contextualMapper?: TypeMapper;
     }
     interface NodeArray<T extends Node> extends Array<T>, TextRange {
         hasTrailingComma?: boolean;
+        transformFlags?: TransformFlags;
     }
-    interface Token extends Node {
-        __tokenTag: any;
-    }
-    interface Modifier extends Token {
-    }
+    interface Token<TKind extends SyntaxKind> extends Node {
+        kind: TKind;
+    }
+    type DotDotDotToken = Token<SyntaxKind.DotDotDotToken>;
+    type QuestionToken = Token<SyntaxKind.QuestionToken>;
+    type ColonToken = Token<SyntaxKind.ColonToken>;
+    type EqualsToken = Token<SyntaxKind.EqualsToken>;
+    type AsteriskToken = Token<SyntaxKind.AsteriskToken>;
+    type EqualsGreaterThanToken = Token<SyntaxKind.EqualsGreaterThanToken>;
+    type EndOfFileToken = Token<SyntaxKind.EndOfFileToken>;
+    type AtToken = Token<SyntaxKind.AtToken>;
+    type ReadonlyToken = Token<SyntaxKind.ReadonlyKeyword>;
+    type AwaitKeywordToken = Token<SyntaxKind.AwaitKeyword>;
+    type Modifier = Token<SyntaxKind.AbstractKeyword> | Token<SyntaxKind.AsyncKeyword> | Token<SyntaxKind.ConstKeyword> | Token<SyntaxKind.DeclareKeyword> | Token<SyntaxKind.DefaultKeyword> | Token<SyntaxKind.ExportKeyword> | Token<SyntaxKind.PublicKeyword> | Token<SyntaxKind.PrivateKeyword> | Token<SyntaxKind.ProtectedKeyword> | Token<SyntaxKind.ReadonlyKeyword> | Token<SyntaxKind.StaticKeyword>;
+    type ModifiersArray = NodeArray<Modifier>;
     const enum GeneratedIdentifierKind {
         None = 0,
         Auto = 1,
@@ -441,122 +489,158 @@ declare namespace ts {
         Node = 4,
     }
     interface Identifier extends PrimaryExpression {
+        kind: SyntaxKind.Identifier;
+        /**
+         * Text of identifier (with escapes converted to characters).
+         * If the identifier begins with two underscores, this will begin with three.
+         */
         text: string;
         originalKeywordKind?: SyntaxKind;
         autoGenerateKind?: GeneratedIdentifierKind;
         autoGenerateId?: number;
+        isInJSDocNamespace?: boolean;
+        typeArguments?: NodeArray<TypeNode>;
     }
     interface TransientIdentifier extends Identifier {
         resolvedSymbol: Symbol;
     }
+    interface GeneratedIdentifier extends Identifier {
+        autoGenerateKind: GeneratedIdentifierKind.Auto | GeneratedIdentifierKind.Loop | GeneratedIdentifierKind.Unique | GeneratedIdentifierKind.Node;
+    }
     interface QualifiedName extends Node {
+        kind: SyntaxKind.QualifiedName;
         left: EntityName;
         right: Identifier;
     }
     type EntityName = Identifier | QualifiedName;
-    type PropertyName = Identifier | LiteralExpression | ComputedPropertyName;
-    type DeclarationName = Identifier | LiteralExpression | ComputedPropertyName | BindingPattern;
+    type PropertyName = Identifier | StringLiteral | NumericLiteral | ComputedPropertyName;
+    type DeclarationName = Identifier | StringLiteral | NumericLiteral | ComputedPropertyName | BindingPattern;
     interface Declaration extends Node {
         _declarationBrand: any;
+    }
+    interface NamedDeclaration extends Declaration {
         name?: DeclarationName;
     }
-    interface DeclarationStatement extends Declaration, Statement {
-        name?: Identifier;
+    interface DeclarationStatement extends NamedDeclaration, Statement {
+        name?: Identifier | StringLiteral | NumericLiteral;
     }
     interface ComputedPropertyName extends Node {
+        kind: SyntaxKind.ComputedPropertyName;
         expression: Expression;
     }
     interface Decorator extends Node {
+        kind: SyntaxKind.Decorator;
         expression: LeftHandSideExpression;
     }
-    interface TypeParameterDeclaration extends Declaration {
+    interface TypeParameterDeclaration extends NamedDeclaration {
+        kind: SyntaxKind.TypeParameter;
+        parent?: DeclarationWithTypeParameters;
         name: Identifier;
         constraint?: TypeNode;
+        default?: TypeNode;
         expression?: Expression;
     }
-    interface SignatureDeclaration extends Declaration {
+    interface SignatureDeclaration extends NamedDeclaration {
         name?: PropertyName;
         typeParameters?: NodeArray<TypeParameterDeclaration>;
         parameters: NodeArray<ParameterDeclaration>;
         type?: TypeNode;
     }
     interface CallSignatureDeclaration extends SignatureDeclaration, TypeElement {
+        kind: SyntaxKind.CallSignature;
     }
     interface ConstructSignatureDeclaration extends SignatureDeclaration, TypeElement {
+        kind: SyntaxKind.ConstructSignature;
     }
     type BindingName = Identifier | BindingPattern;
-    interface VariableDeclaration extends Declaration {
-        parent?: VariableDeclarationList;
+    interface VariableDeclaration extends NamedDeclaration {
+        kind: SyntaxKind.VariableDeclaration;
+        parent?: VariableDeclarationList | CatchClause;
         name: BindingName;
         type?: TypeNode;
         initializer?: Expression;
     }
     interface VariableDeclarationList extends Node {
+        kind: SyntaxKind.VariableDeclarationList;
+        parent?: VariableStatement | ForStatement | ForOfStatement | ForInStatement;
         declarations: NodeArray<VariableDeclaration>;
     }
-    interface ParameterDeclaration extends Declaration {
-        dotDotDotToken?: Node;
+    interface ParameterDeclaration extends NamedDeclaration {
+        kind: SyntaxKind.Parameter;
+        parent?: SignatureDeclaration;
+        dotDotDotToken?: DotDotDotToken;
         name: BindingName;
-        questionToken?: Node;
+        questionToken?: QuestionToken;
         type?: TypeNode;
         initializer?: Expression;
     }
-    interface BindingElement extends Declaration {
+    interface BindingElement extends NamedDeclaration {
+        kind: SyntaxKind.BindingElement;
+        parent?: BindingPattern;
         propertyName?: PropertyName;
-        dotDotDotToken?: Node;
+        dotDotDotToken?: DotDotDotToken;
         name: BindingName;
         initializer?: Expression;
     }
     interface PropertySignature extends TypeElement {
+        kind: SyntaxKind.PropertySignature | SyntaxKind.JSDocRecordMember;
         name: PropertyName;
-        questionToken?: Node;
+        questionToken?: QuestionToken;
         type?: TypeNode;
         initializer?: Expression;
     }
     interface PropertyDeclaration extends ClassElement {
-        questionToken?: Node;
+        kind: SyntaxKind.PropertyDeclaration;
+        questionToken?: QuestionToken;
         name: PropertyName;
         type?: TypeNode;
         initializer?: Expression;
     }
-    interface ObjectLiteralElement extends Declaration {
+    interface ObjectLiteralElement extends NamedDeclaration {
         _objectLiteralBrandBrand: any;
         name?: PropertyName;
     }
-    type ObjectLiteralElementLike = PropertyAssignment | ShorthandPropertyAssignment | MethodDeclaration | AccessorDeclaration;
+    type ObjectLiteralElementLike = PropertyAssignment | ShorthandPropertyAssignment | SpreadAssignment | MethodDeclaration | AccessorDeclaration;
     interface PropertyAssignment extends ObjectLiteralElement {
-        _propertyAssignmentBrand: any;
+        kind: SyntaxKind.PropertyAssignment;
         name: PropertyName;
-        questionToken?: Node;
+        questionToken?: QuestionToken;
         initializer: Expression;
     }
     interface ShorthandPropertyAssignment extends ObjectLiteralElement {
+        kind: SyntaxKind.ShorthandPropertyAssignment;
         name: Identifier;
-        questionToken?: Node;
-        equalsToken?: Node;
+        questionToken?: QuestionToken;
+        equalsToken?: Token<SyntaxKind.EqualsToken>;
         objectAssignmentInitializer?: Expression;
     }
-    interface VariableLikeDeclaration extends Declaration {
+    interface SpreadAssignment extends ObjectLiteralElement {
+        kind: SyntaxKind.SpreadAssignment;
+        expression: Expression;
+    }
+    interface VariableLikeDeclaration extends NamedDeclaration {
         propertyName?: PropertyName;
-        dotDotDotToken?: Node;
+        dotDotDotToken?: DotDotDotToken;
         name: DeclarationName;
-        questionToken?: Node;
+        questionToken?: QuestionToken;
         type?: TypeNode;
         initializer?: Expression;
     }
-    interface PropertyLikeDeclaration extends Declaration {
+    interface PropertyLikeDeclaration extends NamedDeclaration {
         name: PropertyName;
     }
-    interface BindingPattern extends Node {
-        elements: NodeArray<BindingElement | ArrayBindingElement>;
-    }
-    interface ObjectBindingPattern extends BindingPattern {
+    interface ObjectBindingPattern extends Node {
+        kind: SyntaxKind.ObjectBindingPattern;
+        parent?: VariableDeclaration | ParameterDeclaration | BindingElement;
         elements: NodeArray<BindingElement>;
     }
-    type ArrayBindingElement = BindingElement | OmittedExpression;
-    interface ArrayBindingPattern extends BindingPattern {
+    interface ArrayBindingPattern extends Node {
+        kind: SyntaxKind.ArrayBindingPattern;
+        parent?: VariableDeclaration | ParameterDeclaration | BindingElement;
         elements: NodeArray<ArrayBindingElement>;
     }
+    type BindingPattern = ObjectBindingPattern | ArrayBindingPattern;
+    type ArrayBindingElement = BindingElement | OmittedExpression;
     /**
      * Several node kinds share function-like features such as a signature,
      * a name, and a body. These nodes should extend FunctionLikeDeclaration.
@@ -567,118 +651,164 @@ declare namespace ts {
      */
     interface FunctionLikeDeclaration extends SignatureDeclaration {
         _functionLikeDeclarationBrand: any;
-        asteriskToken?: Node;
-        questionToken?: Node;
+        asteriskToken?: AsteriskToken;
+        questionToken?: QuestionToken;
         body?: Block | Expression;
     }
     interface FunctionDeclaration extends FunctionLikeDeclaration, DeclarationStatement {
+        kind: SyntaxKind.FunctionDeclaration;
         name?: Identifier;
         body?: FunctionBody;
     }
     interface MethodSignature extends SignatureDeclaration, TypeElement {
+        kind: SyntaxKind.MethodSignature;
         name: PropertyName;
     }
     interface MethodDeclaration extends FunctionLikeDeclaration, ClassElement, ObjectLiteralElement {
+        kind: SyntaxKind.MethodDeclaration;
         name: PropertyName;
         body?: FunctionBody;
     }
     interface ConstructorDeclaration extends FunctionLikeDeclaration, ClassElement {
+        kind: SyntaxKind.Constructor;
+        parent?: ClassDeclaration | ClassExpression;
         body?: FunctionBody;
     }
+    /** For when we encounter a semicolon in a class declaration. ES6 allows these as class elements. */
     interface SemicolonClassElement extends ClassElement {
-        _semicolonClassElementBrand: any;
+        kind: SyntaxKind.SemicolonClassElement;
+        parent?: ClassDeclaration | ClassExpression;
     }
-    interface AccessorDeclaration extends FunctionLikeDeclaration, ClassElement, ObjectLiteralElement {
-        _accessorDeclarationBrand: any;
+    interface GetAccessorDeclaration extends FunctionLikeDeclaration, ClassElement, ObjectLiteralElement {
+        kind: SyntaxKind.GetAccessor;
+        parent?: ClassDeclaration | ClassExpression | ObjectLiteralExpression;
         name: PropertyName;
         body: FunctionBody;
     }
-    interface GetAccessorDeclaration extends AccessorDeclaration {
-    }
-    interface SetAccessorDeclaration extends AccessorDeclaration {
+    interface SetAccessorDeclaration extends FunctionLikeDeclaration, ClassElement, ObjectLiteralElement {
+        kind: SyntaxKind.SetAccessor;
+        parent?: ClassDeclaration | ClassExpression | ObjectLiteralExpression;
+        name: PropertyName;
+        body: FunctionBody;
     }
+    type AccessorDeclaration = GetAccessorDeclaration | SetAccessorDeclaration;
     interface IndexSignatureDeclaration extends SignatureDeclaration, ClassElement, TypeElement {
-        _indexSignatureDeclarationBrand: any;
+        kind: SyntaxKind.IndexSignature;
+        parent?: ClassDeclaration | ClassExpression | InterfaceDeclaration | TypeLiteralNode;
     }
     interface TypeNode extends Node {
         _typeNodeBrand: any;
     }
-    interface ThisTypeNode extends TypeNode {
-        _thisTypeNodeBrand: any;
+    interface KeywordTypeNode extends TypeNode {
+        kind: SyntaxKind.AnyKeyword | SyntaxKind.NumberKeyword | SyntaxKind.ObjectKeyword | SyntaxKind.BooleanKeyword | SyntaxKind.StringKeyword | SyntaxKind.SymbolKeyword | SyntaxKind.ThisKeyword | SyntaxKind.VoidKeyword | SyntaxKind.UndefinedKeyword | SyntaxKind.NullKeyword | SyntaxKind.NeverKeyword;
     }
-    interface FunctionOrConstructorTypeNode extends TypeNode, SignatureDeclaration {
-        _functionOrConstructorTypeNodeBrand: any;
+    interface ThisTypeNode extends TypeNode {
+        kind: SyntaxKind.ThisType;
     }
-    interface FunctionTypeNode extends FunctionOrConstructorTypeNode {
+    type FunctionOrConstructorTypeNode = FunctionTypeNode | ConstructorTypeNode;
+    interface FunctionTypeNode extends TypeNode, SignatureDeclaration {
+        kind: SyntaxKind.FunctionType;
     }
-    interface ConstructorTypeNode extends FunctionOrConstructorTypeNode {
+    interface ConstructorTypeNode extends TypeNode, SignatureDeclaration {
+        kind: SyntaxKind.ConstructorType;
     }
+    type TypeReferenceType = TypeReferenceNode | ExpressionWithTypeArguments | JSDocTypeReference;
     interface TypeReferenceNode extends TypeNode {
+        kind: SyntaxKind.TypeReference;
         typeName: EntityName;
         typeArguments?: NodeArray<TypeNode>;
     }
     interface TypePredicateNode extends TypeNode {
+        kind: SyntaxKind.TypePredicate;
         parameterName: Identifier | ThisTypeNode;
         type: TypeNode;
     }
     interface TypeQueryNode extends TypeNode {
+        kind: SyntaxKind.TypeQuery;
         exprName: EntityName;
     }
     interface TypeLiteralNode extends TypeNode, Declaration {
+        kind: SyntaxKind.TypeLiteral;
         members: NodeArray<TypeElement>;
     }
     interface ArrayTypeNode extends TypeNode {
+        kind: SyntaxKind.ArrayType;
         elementType: TypeNode;
     }
     interface TupleTypeNode extends TypeNode {
+        kind: SyntaxKind.TupleType;
         elementTypes: NodeArray<TypeNode>;
     }
-    interface UnionOrIntersectionTypeNode extends TypeNode {
+    type UnionOrIntersectionTypeNode = UnionTypeNode | IntersectionTypeNode;
+    interface UnionTypeNode extends TypeNode {
+        kind: SyntaxKind.UnionType;
         types: NodeArray<TypeNode>;
     }
-    interface UnionTypeNode extends UnionOrIntersectionTypeNode {
-    }
-    interface IntersectionTypeNode extends UnionOrIntersectionTypeNode {
+    interface IntersectionTypeNode extends TypeNode {
+        kind: SyntaxKind.IntersectionType;
+        types: NodeArray<TypeNode>;
     }
     interface ParenthesizedTypeNode extends TypeNode {
+        kind: SyntaxKind.ParenthesizedType;
         type: TypeNode;
     }
+    interface TypeOperatorNode extends TypeNode {
+        kind: SyntaxKind.TypeOperator;
+        operator: SyntaxKind.KeyOfKeyword;
+        type: TypeNode;
+    }
+    interface IndexedAccessTypeNode extends TypeNode {
+        kind: SyntaxKind.IndexedAccessType;
+        objectType: TypeNode;
+        indexType: TypeNode;
+    }
+    interface MappedTypeNode extends TypeNode, Declaration {
+        kind: SyntaxKind.MappedType;
+        parent?: TypeAliasDeclaration;
+        readonlyToken?: ReadonlyToken;
+        typeParameter: TypeParameterDeclaration;
+        questionToken?: QuestionToken;
+        type?: TypeNode;
+    }
     interface LiteralTypeNode extends TypeNode {
-        _stringLiteralTypeBrand: any;
+        kind: SyntaxKind.LiteralType;
         literal: Expression;
     }
     interface StringLiteral extends LiteralExpression {
-        _stringLiteralBrand: any;
-        textSourceNode?: Identifier | StringLiteral;
+        kind: SyntaxKind.StringLiteral;
+        textSourceNode?: Identifier | StringLiteral | NumericLiteral;
     }
     interface Expression extends Node {
         _expressionBrand: any;
-        contextualType?: Type;
     }
     interface OmittedExpression extends Expression {
-        _omittedExpressionBrand: any;
+        kind: SyntaxKind.OmittedExpression;
     }
     interface PartiallyEmittedExpression extends LeftHandSideExpression {
+        kind: SyntaxKind.PartiallyEmittedExpression;
         expression: Expression;
     }
     interface UnaryExpression extends Expression {
         _unaryExpressionBrand: any;
     }
-    interface IncrementExpression extends UnaryExpression {
-        _incrementExpressionBrand: any;
+    /** Deprecated, please use UpdateExpression */
+    type IncrementExpression = UpdateExpression;
+    interface UpdateExpression extends UnaryExpression {
+        _updateExpressionBrand: any;
     }
-    interface PrefixUnaryExpression extends IncrementExpression {
-        operator: SyntaxKind;
+    type PrefixUnaryOperator = SyntaxKind.PlusPlusToken | SyntaxKind.MinusMinusToken | SyntaxKind.PlusToken | SyntaxKind.MinusToken | SyntaxKind.TildeToken | SyntaxKind.ExclamationToken;
+    interface PrefixUnaryExpression extends UpdateExpression {
+        kind: SyntaxKind.PrefixUnaryExpression;
+        operator: PrefixUnaryOperator;
         operand: UnaryExpression;
     }
-    interface PostfixUnaryExpression extends IncrementExpression {
+    type PostfixUnaryOperator = SyntaxKind.PlusPlusToken | SyntaxKind.MinusMinusToken;
+    interface PostfixUnaryExpression extends UpdateExpression {
+        kind: SyntaxKind.PostfixUnaryExpression;
         operand: LeftHandSideExpression;
-        operator: SyntaxKind;
-    }
-    interface PostfixExpression extends UnaryExpression {
-        _postfixExpressionBrand: any;
+        operator: PostfixUnaryOperator;
     }
-    interface LeftHandSideExpression extends IncrementExpression {
+    interface LeftHandSideExpression extends UpdateExpression {
         _leftHandSideExpressionBrand: any;
     }
     interface MemberExpression extends LeftHandSideExpression {
@@ -687,191 +817,363 @@ declare namespace ts {
     interface PrimaryExpression extends MemberExpression {
         _primaryExpressionBrand: any;
     }
+    interface NullLiteral extends PrimaryExpression, TypeNode {
+        kind: SyntaxKind.NullKeyword;
+    }
+    interface BooleanLiteral extends PrimaryExpression, TypeNode {
+        kind: SyntaxKind.TrueKeyword | SyntaxKind.FalseKeyword;
+    }
+    interface ThisExpression extends PrimaryExpression, KeywordTypeNode {
+        kind: SyntaxKind.ThisKeyword;
+    }
+    interface SuperExpression extends PrimaryExpression {
+        kind: SyntaxKind.SuperKeyword;
+    }
+    interface ImportExpression extends PrimaryExpression {
+        kind: SyntaxKind.ImportKeyword;
+    }
     interface DeleteExpression extends UnaryExpression {
+        kind: SyntaxKind.DeleteExpression;
         expression: UnaryExpression;
     }
     interface TypeOfExpression extends UnaryExpression {
+        kind: SyntaxKind.TypeOfExpression;
         expression: UnaryExpression;
     }
     interface VoidExpression extends UnaryExpression {
+        kind: SyntaxKind.VoidExpression;
         expression: UnaryExpression;
     }
     interface AwaitExpression extends UnaryExpression {
+        kind: SyntaxKind.AwaitExpression;
         expression: UnaryExpression;
     }
     interface YieldExpression extends Expression {
-        asteriskToken?: Node;
+        kind: SyntaxKind.YieldExpression;
+        asteriskToken?: AsteriskToken;
         expression?: Expression;
     }
+    type ExponentiationOperator = SyntaxKind.AsteriskAsteriskToken;
+    type MultiplicativeOperator = SyntaxKind.AsteriskToken | SyntaxKind.SlashToken | SyntaxKind.PercentToken;
+    type MultiplicativeOperatorOrHigher = ExponentiationOperator | MultiplicativeOperator;
+    type AdditiveOperator = SyntaxKind.PlusToken | SyntaxKind.MinusToken;
+    type AdditiveOperatorOrHigher = MultiplicativeOperatorOrHigher | AdditiveOperator;
+    type ShiftOperator = SyntaxKind.LessThanLessThanToken | SyntaxKind.GreaterThanGreaterThanToken | SyntaxKind.GreaterThanGreaterThanGreaterThanToken;
+    type ShiftOperatorOrHigher = AdditiveOperatorOrHigher | ShiftOperator;
+    type RelationalOperator = SyntaxKind.LessThanToken | SyntaxKind.LessThanEqualsToken | SyntaxKind.GreaterThanToken | SyntaxKind.GreaterThanEqualsToken | SyntaxKind.InstanceOfKeyword | SyntaxKind.InKeyword;
+    type RelationalOperatorOrHigher = ShiftOperatorOrHigher | RelationalOperator;
+    type EqualityOperator = SyntaxKind.EqualsEqualsToken | SyntaxKind.EqualsEqualsEqualsToken | SyntaxKind.ExclamationEqualsEqualsToken | SyntaxKind.ExclamationEqualsToken;
+    type EqualityOperatorOrHigher = RelationalOperatorOrHigher | EqualityOperator;
+    type BitwiseOperator = SyntaxKind.AmpersandToken | SyntaxKind.BarToken | SyntaxKind.CaretToken;
+    type BitwiseOperatorOrHigher = EqualityOperatorOrHigher | BitwiseOperator;
+    type LogicalOperator = SyntaxKind.AmpersandAmpersandToken | SyntaxKind.BarBarToken;
+    type LogicalOperatorOrHigher = BitwiseOperatorOrHigher | LogicalOperator;
+    type CompoundAssignmentOperator = SyntaxKind.PlusEqualsToken | SyntaxKind.MinusEqualsToken | SyntaxKind.AsteriskAsteriskEqualsToken | SyntaxKind.AsteriskEqualsToken | SyntaxKind.SlashEqualsToken | SyntaxKind.PercentEqualsToken | SyntaxKind.AmpersandEqualsToken | SyntaxKind.BarEqualsToken | SyntaxKind.CaretEqualsToken | SyntaxKind.LessThanLessThanEqualsToken | SyntaxKind.GreaterThanGreaterThanGreaterThanEqualsToken | SyntaxKind.GreaterThanGreaterThanEqualsToken;
+    type AssignmentOperator = SyntaxKind.EqualsToken | CompoundAssignmentOperator;
+    type AssignmentOperatorOrHigher = LogicalOperatorOrHigher | AssignmentOperator;
+    type BinaryOperator = AssignmentOperatorOrHigher | SyntaxKind.CommaToken;
+    type BinaryOperatorToken = Token<BinaryOperator>;
     interface BinaryExpression extends Expression, Declaration {
+        kind: SyntaxKind.BinaryExpression;
         left: Expression;
-        operatorToken: Node;
+        operatorToken: BinaryOperatorToken;
         right: Expression;
     }
+    type AssignmentOperatorToken = Token<AssignmentOperator>;
+    interface AssignmentExpression<TOperator extends AssignmentOperatorToken> extends BinaryExpression {
+        left: LeftHandSideExpression;
+        operatorToken: TOperator;
+    }
+    interface ObjectDestructuringAssignment extends AssignmentExpression<EqualsToken> {
+        left: ObjectLiteralExpression;
+    }
+    interface ArrayDestructuringAssignment extends AssignmentExpression<EqualsToken> {
+        left: ArrayLiteralExpression;
+    }
+    type DestructuringAssignment = ObjectDestructuringAssignment | ArrayDestructuringAssignment;
+    type BindingOrAssignmentElement = VariableDeclaration | ParameterDeclaration | BindingElement | PropertyAssignment | ShorthandPropertyAssignment | SpreadAssignment | OmittedExpression | SpreadElement | ArrayLiteralExpression | ObjectLiteralExpression | AssignmentExpression<EqualsToken> | Identifier | PropertyAccessExpression | ElementAccessExpression;
+    type BindingOrAssignmentElementRestIndicator = DotDotDotToken | SpreadElement | SpreadAssignment;
+    type BindingOrAssignmentElementTarget = BindingOrAssignmentPattern | Expression;
+    type ObjectBindingOrAssignmentPattern = ObjectBindingPattern | ObjectLiteralExpression;
+    type ArrayBindingOrAssignmentPattern = ArrayBindingPattern | ArrayLiteralExpression;
+    type AssignmentPattern = ObjectLiteralExpression | ArrayLiteralExpression;
+    type BindingOrAssignmentPattern = ObjectBindingOrAssignmentPattern | ArrayBindingOrAssignmentPattern;
     interface ConditionalExpression extends Expression {
+        kind: SyntaxKind.ConditionalExpression;
         condition: Expression;
-        questionToken: Node;
+        questionToken: QuestionToken;
         whenTrue: Expression;
-        colonToken: Node;
+        colonToken: ColonToken;
         whenFalse: Expression;
     }
     type FunctionBody = Block;
     type ConciseBody = FunctionBody | Expression;
     interface FunctionExpression extends PrimaryExpression, FunctionLikeDeclaration {
+        kind: SyntaxKind.FunctionExpression;
         name?: Identifier;
         body: FunctionBody;
     }
     interface ArrowFunction extends Expression, FunctionLikeDeclaration {
-        equalsGreaterThanToken: Node;
+        kind: SyntaxKind.ArrowFunction;
+        equalsGreaterThanToken: EqualsGreaterThanToken;
         body: ConciseBody;
     }
     interface LiteralLikeNode extends Node {
         text: string;
         isUnterminated?: boolean;
         hasExtendedUnicodeEscape?: boolean;
-        isOctalLiteral?: boolean;
     }
     interface LiteralExpression extends LiteralLikeNode, PrimaryExpression {
         _literalExpressionBrand: any;
     }
+    interface RegularExpressionLiteral extends LiteralExpression {
+        kind: SyntaxKind.RegularExpressionLiteral;
+    }
+    interface NoSubstitutionTemplateLiteral extends LiteralExpression {
+        kind: SyntaxKind.NoSubstitutionTemplateLiteral;
+    }
+    const enum NumericLiteralFlags {
+        None = 0,
+        Scientific = 2,
+        Octal = 4,
+        HexSpecifier = 8,
+        BinarySpecifier = 16,
+        OctalSpecifier = 32,
+        BinaryOrOctalSpecifier = 48,
+    }
     interface NumericLiteral extends LiteralExpression {
-        _numericLiteralBrand: any;
-        trailingComment?: string;
+        kind: SyntaxKind.NumericLiteral;
+        numericLiteralFlags?: NumericLiteralFlags;
+    }
+    interface TemplateHead extends LiteralLikeNode {
+        kind: SyntaxKind.TemplateHead;
+        parent?: TemplateExpression;
     }
-    interface TemplateLiteralFragment extends LiteralLikeNode {
-        _templateLiteralFragmentBrand: any;
+    interface TemplateMiddle extends LiteralLikeNode {
+        kind: SyntaxKind.TemplateMiddle;
+        parent?: TemplateSpan;
     }
-    type Template = TemplateExpression | LiteralExpression;
+    interface TemplateTail extends LiteralLikeNode {
+        kind: SyntaxKind.TemplateTail;
+        parent?: TemplateSpan;
+    }
+    type TemplateLiteral = TemplateExpression | NoSubstitutionTemplateLiteral;
     interface TemplateExpression extends PrimaryExpression {
-        head: TemplateLiteralFragment;
+        kind: SyntaxKind.TemplateExpression;
+        head: TemplateHead;
         templateSpans: NodeArray<TemplateSpan>;
     }
     interface TemplateSpan extends Node {
+        kind: SyntaxKind.TemplateSpan;
+        parent?: TemplateExpression;
         expression: Expression;
-        literal: TemplateLiteralFragment;
+        literal: TemplateMiddle | TemplateTail;
     }
     interface ParenthesizedExpression extends PrimaryExpression {
+        kind: SyntaxKind.ParenthesizedExpression;
         expression: Expression;
     }
     interface ArrayLiteralExpression extends PrimaryExpression {
+        kind: SyntaxKind.ArrayLiteralExpression;
         elements: NodeArray<Expression>;
         multiLine?: boolean;
     }
-    interface SpreadElementExpression extends Expression {
+    interface SpreadElement extends Expression {
+        kind: SyntaxKind.SpreadElement;
         expression: Expression;
     }
     /**
-      * This interface is a base interface for ObjectLiteralExpression and JSXAttributes to extend from. JSXAttributes is similar to
-      * ObjectLiteralExpression in that it contains array of properties; however, JSXAttributes' properties can only be
-      * JSXAttribute or JSXSpreadAttribute. ObjectLiteralExpression, on the other hand, can only have properties of type
-      * ObjectLiteralElement (e.g. PropertyAssignment, ShorthandPropertyAssignment etc.)
-     **/
+     * This interface is a base interface for ObjectLiteralExpression and JSXAttributes to extend from. JSXAttributes is similar to
+     * ObjectLiteralExpression in that it contains array of properties; however, JSXAttributes' properties can only be
+     * JSXAttribute or JSXSpreadAttribute. ObjectLiteralExpression, on the other hand, can only have properties of type
+     * ObjectLiteralElement (e.g. PropertyAssignment, ShorthandPropertyAssignment etc.)
+     */
     interface ObjectLiteralExpressionBase<T extends ObjectLiteralElement> extends PrimaryExpression, Declaration {
         properties: NodeArray<T>;
     }
     interface ObjectLiteralExpression extends ObjectLiteralExpressionBase<ObjectLiteralElementLike> {
+        kind: SyntaxKind.ObjectLiteralExpression;
         multiLine?: boolean;
     }
-    type EntityNameExpression = Identifier | PropertyAccessEntityNameExpression;
+    type EntityNameExpression = Identifier | PropertyAccessEntityNameExpression | ParenthesizedExpression;
     type EntityNameOrEntityNameExpression = EntityName | EntityNameExpression;
-    interface PropertyAccessExpression extends MemberExpression, Declaration {
+    interface PropertyAccessExpression extends MemberExpression, NamedDeclaration {
+        kind: SyntaxKind.PropertyAccessExpression;
         expression: LeftHandSideExpression;
         name: Identifier;
     }
+    interface SuperPropertyAccessExpression extends PropertyAccessExpression {
+        expression: SuperExpression;
+    }
     /** Brand for a PropertyAccessExpression which, like a QualifiedName, consists of a sequence of identifiers separated by dots. */
     interface PropertyAccessEntityNameExpression extends PropertyAccessExpression {
         _propertyAccessExpressionLikeQualifiedNameBrand?: any;
         expression: EntityNameExpression;
     }
     interface ElementAccessExpression extends MemberExpression {
+        kind: SyntaxKind.ElementAccessExpression;
         expression: LeftHandSideExpression;
         argumentExpression?: Expression;
     }
+    interface SuperElementAccessExpression extends ElementAccessExpression {
+        expression: SuperExpression;
+    }
+    type SuperProperty = SuperPropertyAccessExpression | SuperElementAccessExpression;
     interface CallExpression extends LeftHandSideExpression, Declaration {
+        kind: SyntaxKind.CallExpression;
         expression: LeftHandSideExpression;
         typeArguments?: NodeArray<TypeNode>;
         arguments: NodeArray<Expression>;
     }
+    interface SuperCall extends CallExpression {
+        expression: SuperExpression;
+    }
+    interface ImportCall extends CallExpression {
+        expression: ImportExpression;
+    }
     interface ExpressionWithTypeArguments extends TypeNode {
+        kind: SyntaxKind.ExpressionWithTypeArguments;
+        parent?: HeritageClause;
         expression: LeftHandSideExpression;
         typeArguments?: NodeArray<TypeNode>;
     }
-    interface NewExpression extends CallExpression, PrimaryExpression {
+    interface NewExpression extends PrimaryExpression, Declaration {
+        kind: SyntaxKind.NewExpression;
+        expression: LeftHandSideExpression;
+        typeArguments?: NodeArray<TypeNode>;
+        arguments?: NodeArray<Expression>;
     }
     interface TaggedTemplateExpression extends MemberExpression {
+        kind: SyntaxKind.TaggedTemplateExpression;
         tag: LeftHandSideExpression;
-        template: Template;
+        template: TemplateLiteral;
     }
-    type CallLikeExpression = CallExpression | NewExpression | TaggedTemplateExpression | Decorator;
+    type CallLikeExpression = CallExpression | NewExpression | TaggedTemplateExpression | Decorator | JsxOpeningLikeElement;
     interface AsExpression extends Expression {
+        kind: SyntaxKind.AsExpression;
         expression: Expression;
         type: TypeNode;
     }
     interface TypeAssertion extends UnaryExpression {
+        kind: SyntaxKind.TypeAssertionExpression;
         type: TypeNode;
         expression: UnaryExpression;
     }
     type AssertionExpression = TypeAssertion | AsExpression;
     interface NonNullExpression extends LeftHandSideExpression {
+        kind: SyntaxKind.NonNullExpression;
         expression: Expression;
     }
+    interface MetaProperty extends PrimaryExpression {
+        kind: SyntaxKind.MetaProperty;
+        keywordToken: SyntaxKind.NewKeyword;
+        name: Identifier;
+    }
     interface JsxElement extends PrimaryExpression {
+        kind: SyntaxKind.JsxElement;
         openingElement: JsxOpeningElement;
         children: NodeArray<JsxChild>;
         closingElement: JsxClosingElement;
     }
+    type JsxOpeningLikeElement = JsxSelfClosingElement | JsxOpeningElement;
+    type JsxAttributeLike = JsxAttribute | JsxSpreadAttribute;
     type JsxTagNameExpression = PrimaryExpression | PropertyAccessExpression;
+    interface JsxAttributes extends ObjectLiteralExpressionBase<JsxAttributeLike> {
+        parent?: JsxOpeningLikeElement;
+    }
     interface JsxOpeningElement extends Expression {
-        _openingElementBrand?: any;
+        kind: SyntaxKind.JsxOpeningElement;
+        parent?: JsxElement;
         tagName: JsxTagNameExpression;
-        attributes: NodeArray<JsxAttribute | JsxSpreadAttribute>;
+        attributes: JsxAttributes;
     }
-    interface JsxSelfClosingElement extends PrimaryExpression, JsxOpeningElement {
-        _selfClosingElementBrand?: any;
+    interface JsxSelfClosingElement extends PrimaryExpression {
+        kind: SyntaxKind.JsxSelfClosingElement;
+        tagName: JsxTagNameExpression;
+        attributes: JsxAttributes;
     }
-    type JsxOpeningLikeElement = JsxSelfClosingElement | JsxOpeningElement;
-    type JsxAttributeLike = JsxAttribute | JsxSpreadAttribute;
-    interface JsxAttribute extends Node {
+    interface JsxAttribute extends ObjectLiteralElement {
+        kind: SyntaxKind.JsxAttribute;
+        parent?: JsxAttributes;
         name: Identifier;
         initializer?: StringLiteral | JsxExpression;
     }
-    interface JsxSpreadAttribute extends Node {
+    interface JsxSpreadAttribute extends ObjectLiteralElement {
+        kind: SyntaxKind.JsxSpreadAttribute;
+        parent?: JsxAttributes;
         expression: Expression;
     }
     interface JsxClosingElement extends Node {
+        kind: SyntaxKind.JsxClosingElement;
+        parent?: JsxElement;
         tagName: JsxTagNameExpression;
     }
     interface JsxExpression extends Expression {
+        kind: SyntaxKind.JsxExpression;
+        parent?: JsxElement | JsxAttributeLike;
+        dotDotDotToken?: Token<SyntaxKind.DotDotDotToken>;
         expression?: Expression;
     }
     interface JsxText extends Node {
-        _jsxTextExpressionBrand: any;
+        kind: SyntaxKind.JsxText;
+        containsOnlyWhiteSpaces: boolean;
+        parent?: JsxElement;
     }
     type JsxChild = JsxText | JsxExpression | JsxElement | JsxSelfClosingElement;
     interface Statement extends Node {
         _statementBrand: any;
     }
     interface NotEmittedStatement extends Statement {
+        kind: SyntaxKind.NotEmittedStatement;
+    }
+    /**
+     * Marks the end of transformed declaration to properly emit exports.
+     */
+    interface EndOfDeclarationMarker extends Statement {
+        kind: SyntaxKind.EndOfDeclarationMarker;
+    }
+    /**
+     * A list of comma-seperated expressions. This node is only created by transformations.
+     */
+    interface CommaListExpression extends Expression {
+        kind: SyntaxKind.CommaListExpression;
+        elements: NodeArray<Expression>;
+    }
+    /**
+     * Marks the beginning of a merged transformed declaration.
+     */
+    interface MergeDeclarationMarker extends Statement {
+        kind: SyntaxKind.MergeDeclarationMarker;
     }
     interface EmptyStatement extends Statement {
+        kind: SyntaxKind.EmptyStatement;
     }
     interface DebuggerStatement extends Statement {
+        kind: SyntaxKind.DebuggerStatement;
     }
     interface MissingDeclaration extends DeclarationStatement, ClassElement, ObjectLiteralElement, TypeElement {
+        kind: SyntaxKind.MissingDeclaration;
         name?: Identifier;
     }
-    type BlockLike = SourceFile | Block | ModuleBlock | CaseClause;
+    type BlockLike = SourceFile | Block | ModuleBlock | CaseOrDefaultClause;
     interface Block extends Statement {
+        kind: SyntaxKind.Block;
         statements: NodeArray<Statement>;
         multiLine?: boolean;
     }
     interface VariableStatement extends Statement {
+        kind: SyntaxKind.VariableStatement;
         declarationList: VariableDeclarationList;
     }
     interface ExpressionStatement extends Statement {
+        kind: SyntaxKind.ExpressionStatement;
         expression: Expression;
     }
+    interface PrologueDirective extends ExpressionStatement {
+        expression: StringLiteral;
+    }
     interface IfStatement extends Statement {
+        kind: SyntaxKind.IfStatement;
         expression: Expression;
         thenStatement: Statement;
         elseStatement?: Statement;
@@ -880,276 +1182,402 @@ declare namespace ts {
         statement: Statement;
     }
     interface DoStatement extends IterationStatement {
+        kind: SyntaxKind.DoStatement;
         expression: Expression;
     }
     interface WhileStatement extends IterationStatement {
+        kind: SyntaxKind.WhileStatement;
         expression: Expression;
     }
     type ForInitializer = VariableDeclarationList | Expression;
     interface ForStatement extends IterationStatement {
+        kind: SyntaxKind.ForStatement;
         initializer?: ForInitializer;
         condition?: Expression;
         incrementor?: Expression;
     }
+    type ForInOrOfStatement = ForInStatement | ForOfStatement;
     interface ForInStatement extends IterationStatement {
+        kind: SyntaxKind.ForInStatement;
         initializer: ForInitializer;
         expression: Expression;
     }
     interface ForOfStatement extends IterationStatement {
+        kind: SyntaxKind.ForOfStatement;
+        awaitModifier?: AwaitKeywordToken;
         initializer: ForInitializer;
         expression: Expression;
     }
     interface BreakStatement extends Statement {
+        kind: SyntaxKind.BreakStatement;
         label?: Identifier;
     }
     interface ContinueStatement extends Statement {
+        kind: SyntaxKind.ContinueStatement;
         label?: Identifier;
     }
     type BreakOrContinueStatement = BreakStatement | ContinueStatement;
     interface ReturnStatement extends Statement {
+        kind: SyntaxKind.ReturnStatement;
         expression?: Expression;
     }
     interface WithStatement extends Statement {
+        kind: SyntaxKind.WithStatement;
         expression: Expression;
         statement: Statement;
     }
     interface SwitchStatement extends Statement {
+        kind: SyntaxKind.SwitchStatement;
         expression: Expression;
         caseBlock: CaseBlock;
         possiblyExhaustive?: boolean;
     }
     interface CaseBlock extends Node {
+        kind: SyntaxKind.CaseBlock;
+        parent?: SwitchStatement;
         clauses: NodeArray<CaseOrDefaultClause>;
     }
     interface CaseClause extends Node {
+        kind: SyntaxKind.CaseClause;
+        parent?: CaseBlock;
         expression: Expression;
         statements: NodeArray<Statement>;
     }
     interface DefaultClause extends Node {
+        kind: SyntaxKind.DefaultClause;
+        parent?: CaseBlock;
         statements: NodeArray<Statement>;
     }
     type CaseOrDefaultClause = CaseClause | DefaultClause;
     interface LabeledStatement extends Statement {
+        kind: SyntaxKind.LabeledStatement;
         label: Identifier;
         statement: Statement;
     }
     interface ThrowStatement extends Statement {
+        kind: SyntaxKind.ThrowStatement;
         expression: Expression;
     }
     interface TryStatement extends Statement {
+        kind: SyntaxKind.TryStatement;
         tryBlock: Block;
         catchClause?: CatchClause;
         finallyBlock?: Block;
     }
     interface CatchClause extends Node {
+        kind: SyntaxKind.CatchClause;
+        parent?: TryStatement;
         variableDeclaration: VariableDeclaration;
         block: Block;
     }
-    type DeclarationWithTypeParameters = SignatureDeclaration | ClassLikeDeclaration | InterfaceDeclaration | TypeAliasDeclaration;
-    interface ClassLikeDeclaration extends Declaration {
+    type DeclarationWithTypeParameters = SignatureDeclaration | ClassLikeDeclaration | InterfaceDeclaration | TypeAliasDeclaration | JSDocTemplateTag;
+    interface ClassLikeDeclaration extends NamedDeclaration {
         name?: Identifier;
         typeParameters?: NodeArray<TypeParameterDeclaration>;
         heritageClauses?: NodeArray<HeritageClause>;
         members: NodeArray<ClassElement>;
     }
     interface ClassDeclaration extends ClassLikeDeclaration, DeclarationStatement {
+        kind: SyntaxKind.ClassDeclaration;
         name?: Identifier;
     }
     interface ClassExpression extends ClassLikeDeclaration, PrimaryExpression {
+        kind: SyntaxKind.ClassExpression;
     }
-    interface ClassElement extends Declaration {
+    interface ClassElement extends NamedDeclaration {
         _classElementBrand: any;
         name?: PropertyName;
     }
-    interface TypeElement extends Declaration {
+    interface TypeElement extends NamedDeclaration {
         _typeElementBrand: any;
         name?: PropertyName;
-        questionToken?: Node;
+        questionToken?: QuestionToken;
     }
     interface InterfaceDeclaration extends DeclarationStatement {
+        kind: SyntaxKind.InterfaceDeclaration;
         name: Identifier;
         typeParameters?: NodeArray<TypeParameterDeclaration>;
         heritageClauses?: NodeArray<HeritageClause>;
         members: NodeArray<TypeElement>;
     }
     interface HeritageClause extends Node {
-        token: SyntaxKind;
-        types?: NodeArray<ExpressionWithTypeArguments>;
+        kind: SyntaxKind.HeritageClause;
+        parent?: InterfaceDeclaration | ClassDeclaration | ClassExpression;
+        token: SyntaxKind.ExtendsKeyword | SyntaxKind.ImplementsKeyword;
+        types: NodeArray<ExpressionWithTypeArguments>;
     }
     interface TypeAliasDeclaration extends DeclarationStatement {
+        kind: SyntaxKind.TypeAliasDeclaration;
         name: Identifier;
         typeParameters?: NodeArray<TypeParameterDeclaration>;
         type: TypeNode;
     }
-    interface EnumMember extends Declaration {
+    interface EnumMember extends NamedDeclaration {
+        kind: SyntaxKind.EnumMember;
+        parent?: EnumDeclaration;
         name: PropertyName;
         initializer?: Expression;
     }
     interface EnumDeclaration extends DeclarationStatement {
+        kind: SyntaxKind.EnumDeclaration;
         name: Identifier;
         members: NodeArray<EnumMember>;
     }
-    type ModuleBody = ModuleBlock | ModuleDeclaration;
     type ModuleName = Identifier | StringLiteral;
+    type ModuleBody = NamespaceBody | JSDocNamespaceBody;
     interface ModuleDeclaration extends DeclarationStatement {
-        name: Identifier | LiteralExpression;
-        body?: ModuleBlock | ModuleDeclaration;
+        kind: SyntaxKind.ModuleDeclaration;
+        parent?: ModuleBody | SourceFile;
+        name: ModuleName;
+        body?: ModuleBody | JSDocNamespaceDeclaration;
+    }
+    type NamespaceBody = ModuleBlock | NamespaceDeclaration;
+    interface NamespaceDeclaration extends ModuleDeclaration {
+        name: Identifier;
+        body: NamespaceBody;
+    }
+    type JSDocNamespaceBody = Identifier | JSDocNamespaceDeclaration;
+    interface JSDocNamespaceDeclaration extends ModuleDeclaration {
+        name: Identifier;
+        body: JSDocNamespaceBody;
     }
     interface ModuleBlock extends Node, Statement {
+        kind: SyntaxKind.ModuleBlock;
+        parent?: ModuleDeclaration;
         statements: NodeArray<Statement>;
     }
     type ModuleReference = EntityName | ExternalModuleReference;
+    /**
+     * One of:
+     * - import x = require("mod");
+     * - import x = M.x;
+     */
     interface ImportEqualsDeclaration extends DeclarationStatement {
+        kind: SyntaxKind.ImportEqualsDeclaration;
+        parent?: SourceFile | ModuleBlock;
         name: Identifier;
         moduleReference: ModuleReference;
     }
     interface ExternalModuleReference extends Node {
+        kind: SyntaxKind.ExternalModuleReference;
+        parent?: ImportEqualsDeclaration;
         expression?: Expression;
     }
     interface ImportDeclaration extends Statement {
+        kind: SyntaxKind.ImportDeclaration;
+        parent?: SourceFile | ModuleBlock;
         importClause?: ImportClause;
+        /** If this is not a StringLiteral it will be a grammar error. */
         moduleSpecifier: Expression;
     }
     type NamedImportBindings = NamespaceImport | NamedImports;
-    interface ImportClause extends Declaration {
+    interface ImportClause extends NamedDeclaration {
+        kind: SyntaxKind.ImportClause;
+        parent?: ImportDeclaration;
         name?: Identifier;
         namedBindings?: NamedImportBindings;
     }
-    interface NamespaceImport extends Declaration {
+    interface NamespaceImport extends NamedDeclaration {
+        kind: SyntaxKind.NamespaceImport;
+        parent?: ImportClause;
         name: Identifier;
     }
     interface NamespaceExportDeclaration extends DeclarationStatement {
+        kind: SyntaxKind.NamespaceExportDeclaration;
         name: Identifier;
-        moduleReference: LiteralLikeNode;
     }
     interface ExportDeclaration extends DeclarationStatement {
+        kind: SyntaxKind.ExportDeclaration;
+        parent?: SourceFile | ModuleBlock;
         exportClause?: NamedExports;
+        /** If this is not a StringLiteral it will be a grammar error. */
         moduleSpecifier?: Expression;
     }
     interface NamedImports extends Node {
+        kind: SyntaxKind.NamedImports;
+        parent?: ImportClause;
         elements: NodeArray<ImportSpecifier>;
     }
     interface NamedExports extends Node {
+        kind: SyntaxKind.NamedExports;
+        parent?: ExportDeclaration;
         elements: NodeArray<ExportSpecifier>;
     }
     type NamedImportsOrExports = NamedImports | NamedExports;
-    interface ImportSpecifier extends Declaration {
+    interface ImportSpecifier extends NamedDeclaration {
+        kind: SyntaxKind.ImportSpecifier;
+        parent?: NamedImports;
         propertyName?: Identifier;
         name: Identifier;
     }
-    interface ExportSpecifier extends Declaration {
+    interface ExportSpecifier extends NamedDeclaration {
+        kind: SyntaxKind.ExportSpecifier;
+        parent?: NamedExports;
         propertyName?: Identifier;
         name: Identifier;
     }
     type ImportOrExportSpecifier = ImportSpecifier | ExportSpecifier;
     interface ExportAssignment extends DeclarationStatement {
+        kind: SyntaxKind.ExportAssignment;
+        parent?: SourceFile;
         isExportEquals?: boolean;
         expression: Expression;
     }
     interface FileReference extends TextRange {
         fileName: string;
     }
+    interface CheckJsDirective extends TextRange {
+        enabled: boolean;
+    }
+    type CommentKind = SyntaxKind.SingleLineCommentTrivia | SyntaxKind.MultiLineCommentTrivia;
     interface CommentRange extends TextRange {
         hasTrailingNewLine?: boolean;
-        kind: SyntaxKind;
+        kind: CommentKind;
+    }
+    interface SynthesizedComment extends CommentRange {
+        text: string;
+        pos: -1;
+        end: -1;
     }
     interface JSDocTypeExpression extends Node {
+        kind: SyntaxKind.JSDocTypeExpression;
         type: JSDocType;
     }
     interface JSDocType extends TypeNode {
         _jsDocTypeBrand: any;
     }
     interface JSDocAllType extends JSDocType {
-        _JSDocAllTypeBrand: any;
+        kind: SyntaxKind.JSDocAllType;
     }
     interface JSDocUnknownType extends JSDocType {
-        _JSDocUnknownTypeBrand: any;
+        kind: SyntaxKind.JSDocUnknownType;
     }
     interface JSDocArrayType extends JSDocType {
+        kind: SyntaxKind.JSDocArrayType;
         elementType: JSDocType;
     }
     interface JSDocUnionType extends JSDocType {
+        kind: SyntaxKind.JSDocUnionType;
         types: NodeArray<JSDocType>;
     }
     interface JSDocTupleType extends JSDocType {
+        kind: SyntaxKind.JSDocTupleType;
         types: NodeArray<JSDocType>;
     }
     interface JSDocNonNullableType extends JSDocType {
+        kind: SyntaxKind.JSDocNonNullableType;
         type: JSDocType;
     }
     interface JSDocNullableType extends JSDocType {
+        kind: SyntaxKind.JSDocNullableType;
         type: JSDocType;
     }
-    interface JSDocRecordType extends JSDocType, TypeLiteralNode {
+    interface JSDocRecordType extends JSDocType {
+        kind: SyntaxKind.JSDocRecordType;
         literal: TypeLiteralNode;
     }
     interface JSDocTypeReference extends JSDocType {
+        kind: SyntaxKind.JSDocTypeReference;
         name: EntityName;
         typeArguments: NodeArray<JSDocType>;
     }
     interface JSDocOptionalType extends JSDocType {
+        kind: SyntaxKind.JSDocOptionalType;
         type: JSDocType;
     }
     interface JSDocFunctionType extends JSDocType, SignatureDeclaration {
+        kind: SyntaxKind.JSDocFunctionType;
         parameters: NodeArray<ParameterDeclaration>;
         type: JSDocType;
     }
     interface JSDocVariadicType extends JSDocType {
+        kind: SyntaxKind.JSDocVariadicType;
         type: JSDocType;
     }
     interface JSDocConstructorType extends JSDocType {
+        kind: SyntaxKind.JSDocConstructorType;
         type: JSDocType;
     }
     interface JSDocThisType extends JSDocType {
+        kind: SyntaxKind.JSDocThisType;
         type: JSDocType;
     }
     interface JSDocLiteralType extends JSDocType {
+        kind: SyntaxKind.JSDocLiteralType;
         literal: LiteralTypeNode;
     }
     type JSDocTypeReferencingNode = JSDocThisType | JSDocConstructorType | JSDocVariadicType | JSDocOptionalType | JSDocNullableType | JSDocNonNullableType;
     interface JSDocRecordMember extends PropertySignature {
-        name: Identifier | LiteralExpression;
+        kind: SyntaxKind.JSDocRecordMember;
+        name: Identifier | StringLiteral | NumericLiteral;
         type?: JSDocType;
     }
     interface JSDoc extends Node {
+        kind: SyntaxKind.JSDocComment;
         tags: NodeArray<JSDocTag> | undefined;
         comment: string | undefined;
     }
     interface JSDocTag extends Node {
-        atToken: Node;
+        parent: JSDoc;
+        atToken: AtToken;
         tagName: Identifier;
         comment: string | undefined;
     }
+    interface JSDocUnknownTag extends JSDocTag {
+        kind: SyntaxKind.JSDocTag;
+    }
+    interface JSDocAugmentsTag extends JSDocTag {
+        kind: SyntaxKind.JSDocAugmentsTag;
+        typeExpression: JSDocTypeExpression;
+    }
+    interface JSDocClassTag extends JSDocTag {
+        kind: SyntaxKind.JSDocClassTag;
+    }
     interface JSDocTemplateTag extends JSDocTag {
+        kind: SyntaxKind.JSDocTemplateTag;
         typeParameters: NodeArray<TypeParameterDeclaration>;
     }
     interface JSDocReturnTag extends JSDocTag {
+        kind: SyntaxKind.JSDocReturnTag;
         typeExpression: JSDocTypeExpression;
     }
     interface JSDocTypeTag extends JSDocTag {
+        kind: SyntaxKind.JSDocTypeTag;
         typeExpression: JSDocTypeExpression;
     }
-    interface JSDocTypedefTag extends JSDocTag, Declaration {
+    interface JSDocTypedefTag extends JSDocTag, NamedDeclaration {
+        parent: JSDoc;
+        kind: SyntaxKind.JSDocTypedefTag;
+        fullName?: JSDocNamespaceDeclaration | Identifier;
         name?: Identifier;
         typeExpression?: JSDocTypeExpression;
         jsDocTypeLiteral?: JSDocTypeLiteral;
     }
     interface JSDocPropertyTag extends JSDocTag, TypeElement {
+        parent: JSDoc;
+        kind: SyntaxKind.JSDocPropertyTag;
         name: Identifier;
+        /** the parameter name, if provided *before* the type (TypeScript-style) */
+        preParameterName?: Identifier;
+        /** the parameter name, if provided *after* the type (JSDoc-standard) */
+        postParameterName?: Identifier;
         typeExpression: JSDocTypeExpression;
+        isBracketed: boolean;
     }
     interface JSDocTypeLiteral extends JSDocType {
+        kind: SyntaxKind.JSDocTypeLiteral;
         jsDocPropertyTags?: NodeArray<JSDocPropertyTag>;
         jsDocTypeTag?: JSDocTypeTag;
     }
     interface JSDocParameterTag extends JSDocTag {
+        kind: SyntaxKind.JSDocParameterTag;
         /** the parameter name, if provided *before* the type (TypeScript-style) */
         preParameterName?: Identifier;
         typeExpression?: JSDocTypeExpression;
         /** the parameter name, if provided *after* the type (JSDoc-standard) */
         postParameterName?: Identifier;
         /** the parameter name, regardless of the location it was provided */
-        parameterName: Identifier;
+        name: Identifier;
         isBracketed: boolean;
     }
     const enum FlowFlags {
@@ -1161,17 +1589,30 @@ declare namespace ts {
         TrueCondition = 32,
         FalseCondition = 64,
         SwitchClause = 128,
-        Referenced = 256,
-        Shared = 512,
+        ArrayMutation = 256,
+        Referenced = 512,
+        Shared = 1024,
+        PreFinally = 2048,
+        AfterFinally = 4096,
         Label = 12,
         Condition = 96,
     }
+    interface FlowLock {
+        locked?: boolean;
+    }
+    interface AfterFinallyFlow extends FlowNode, FlowLock {
+        antecedent: FlowNode;
+    }
+    interface PreFinallyFlow extends FlowNode {
+        antecedent: FlowNode;
+        lock: FlowLock;
+    }
     interface FlowNode {
         flags: FlowFlags;
         id?: number;
     }
     interface FlowStart extends FlowNode {
-        container?: FunctionExpression | ArrowFunction;
+        container?: FunctionExpression | ArrowFunction | MethodDeclaration;
     }
     interface FlowLabel extends FlowNode {
         antecedents: FlowNode[];
@@ -1190,6 +1631,10 @@ declare namespace ts {
         clauseEnd: number;
         antecedent: FlowNode;
     }
+    interface FlowArrayMutation extends FlowNode {
+        node: CallExpression | BinaryExpression;
+        antecedent: FlowNode;
+    }
     type FlowType = Type | IncompleteType;
     interface IncompleteType {
         flags: TypeFlags;
@@ -1199,9 +1644,17 @@ declare namespace ts {
         path: string;
         name: string;
     }
+    /**
+     * Subset of properties from SourceFile that are used in multiple utility functions
+     */
+    interface SourceFileLike {
+        readonly text: string;
+        lineMap: number[];
+    }
     interface SourceFile extends Declaration {
+        kind: SyntaxKind.SourceFile;
         statements: NodeArray<Statement>;
-        endOfFileToken: Node;
+        endOfFileToken: Token<SyntaxKind.EndOfFileToken>;
         fileName: string;
         path: Path;
         text: string;
@@ -1231,14 +1684,25 @@ declare namespace ts {
         symbolCount: number;
         parseDiagnostics: Diagnostic[];
         bindDiagnostics: Diagnostic[];
+        jsDocDiagnostics?: Diagnostic[];
+        additionalSyntacticDiagnostics?: Diagnostic[];
         lineMap: number[];
         classifiableNames?: Map<string>;
-        resolvedModules: Map<ResolvedModule>;
+        resolvedModules: Map<ResolvedModuleFull>;
         resolvedTypeReferenceDirectiveNames: Map<ResolvedTypeReferenceDirective>;
-        imports: LiteralExpression[];
-        moduleAugmentations: LiteralExpression[];
+        imports: StringLiteral[];
+        moduleAugmentations: StringLiteral[];
         patternAmbientModules?: PatternAmbientModule[];
-        externalHelpersModuleName?: Identifier;
+        ambientModuleNames: string[];
+        checkJsDirective: CheckJsDirective | undefined;
+    }
+    interface Bundle extends Node {
+        kind: SyntaxKind.Bundle;
+        sourceFiles: SourceFile[];
+    }
+    interface JsonSourceFile extends SourceFile {
+        jsonObject?: ObjectLiteralExpression;
+        extendedSourceFiles?: string[];
     }
     interface ScriptReferenceHost {
         getCompilerOptions(): CompilerOptions;
@@ -1250,9 +1714,9 @@ declare namespace ts {
         useCaseSensitiveFileNames: boolean;
         readDirectory(rootDir: string, extensions: string[], excludes: string[], includes: string[]): string[];
         /**
-          * Gets a value indicating whether the specified path exists and is a file.
-          * @param path The path to test.
-          */
+         * Gets a value indicating whether the specified path exists and is a file.
+         * @param path The path to test.
+         */
         fileExists(path: string): boolean;
         readFile(path: string): string;
     }
@@ -1285,7 +1749,7 @@ declare namespace ts {
          * used for writing the JavaScript and declaration files.  Otherwise, the writeFile parameter
          * will be invoked when writing the JavaScript and declaration files.
          */
-        emit(targetSourceFile?: SourceFile, writeFile?: WriteFileCallback, cancellationToken?: CancellationToken, emitOnlyDtsFiles?: boolean): EmitResult;
+        emit(targetSourceFile?: SourceFile, writeFile?: WriteFileCallback, cancellationToken?: CancellationToken, emitOnlyDtsFiles?: boolean, customTransformers?: CustomTransformers): EmitResult;
         getOptionsDiagnostics(cancellationToken?: CancellationToken): Diagnostic[];
         getGlobalDiagnostics(cancellationToken?: CancellationToken): Diagnostic[];
         getSyntacticDiagnostics(sourceFile?: SourceFile, cancellationToken?: CancellationToken): Diagnostic[];
@@ -1305,7 +1769,20 @@ declare namespace ts {
         getTypeCount(): number;
         getFileProcessingDiagnostics(): DiagnosticCollection;
         getResolvedTypeReferenceDirectives(): Map<ResolvedTypeReferenceDirective>;
-        structureIsReused?: boolean;
+        isSourceFileFromExternalLibrary(file: SourceFile): boolean;
+        structureIsReused?: StructureIsReused;
+        getSourceFileFromReference(referencingFile: SourceFile, ref: FileReference): SourceFile | undefined;
+    }
+    const enum StructureIsReused {
+        Not = 0,
+        SafeModules = 1,
+        Completely = 2,
+    }
+    interface CustomTransformers {
+        /** Custom transformers to evaluate before built-in transformations. */
+        before?: TransformerFactory<SourceFile>[];
+        /** Custom transformers to evaluate after built-in transformations. */
+        after?: TransformerFactory<SourceFile>[];
     }
     interface SourceMapSpan {
         /** Line number in the .js file. */
@@ -1356,40 +1833,68 @@ declare namespace ts {
         getTypeOfSymbolAtLocation(symbol: Symbol, node: Node): Type;
         getDeclaredTypeOfSymbol(symbol: Symbol): Type;
         getPropertiesOfType(type: Type): Symbol[];
-        getPropertyOfType(type: Type, propertyName: string): Symbol;
+        getPropertyOfType(type: Type, propertyName: string): Symbol | undefined;
+        getIndexInfoOfType(type: Type, kind: IndexKind): IndexInfo | undefined;
         getSignaturesOfType(type: Type, kind: SignatureKind): Signature[];
-        getIndexTypeOfType(type: Type, kind: IndexKind): Type;
-        getBaseTypes(type: InterfaceType): ObjectType[];
+        getIndexTypeOfType(type: Type, kind: IndexKind): Type | undefined;
+        getBaseTypes(type: InterfaceType): BaseType[];
+        getBaseTypeOfLiteralType(type: Type): Type;
+        getWidenedType(type: Type): Type;
         getReturnTypeOfSignature(signature: Signature): Type;
+        /**
+         * Gets the type of a parameter at a given position in a signature.
+         * Returns `any` if the index is not valid.
+         */
+        getParameterType(signature: Signature, parameterIndex: number): Type;
         getNonNullableType(type: Type): Type;
+        /** Note that the resulting nodes cannot be checked. */
+        typeToTypeNode(type: Type, enclosingDeclaration?: Node, flags?: NodeBuilderFlags): TypeNode;
+        /** Note that the resulting nodes cannot be checked. */
+        signatureToSignatureDeclaration(signature: Signature, kind: SyntaxKind, enclosingDeclaration?: Node, flags?: NodeBuilderFlags): SignatureDeclaration;
+        /** Note that the resulting nodes cannot be checked. */
+        indexInfoToIndexSignatureDeclaration(indexInfo: IndexInfo, kind: IndexKind, enclosingDeclaration?: Node, flags?: NodeBuilderFlags): IndexSignatureDeclaration;
         getSymbolsInScope(location: Node, meaning: SymbolFlags): Symbol[];
-        getSymbolAtLocation(node: Node): Symbol;
+        getSymbolAtLocation(node: Node): Symbol | undefined;
         getSymbolsOfParameterPropertyDeclaration(parameter: ParameterDeclaration, parameterName: string): Symbol[];
-        getShorthandAssignmentValueSymbol(location: Node): Symbol;
-        getExportSpecifierLocalTargetSymbol(location: ExportSpecifier): Symbol;
-        getPropertySymbolOfDestructuringAssignment(location: Identifier): Symbol;
+        getShorthandAssignmentValueSymbol(location: Node): Symbol | undefined;
+        getExportSpecifierLocalTargetSymbol(location: ExportSpecifier): Symbol | undefined;
+        getPropertySymbolOfDestructuringAssignment(location: Identifier): Symbol | undefined;
         getTypeAtLocation(node: Node): Type;
+        getTypeFromTypeNode(node: TypeNode): Type;
+        signatureToString(signature: Signature, enclosingDeclaration?: Node, flags?: TypeFormatFlags, kind?: SignatureKind): string;
         typeToString(type: Type, enclosingDeclaration?: Node, flags?: TypeFormatFlags): string;
         symbolToString(symbol: Symbol, enclosingDeclaration?: Node, meaning?: SymbolFlags): string;
         getSymbolDisplayBuilder(): SymbolDisplayBuilder;
         getFullyQualifiedName(symbol: Symbol): string;
         getAugmentedPropertiesOfType(type: Type): Symbol[];
         getRootSymbols(symbol: Symbol): Symbol[];
-        getContextualType(node: Expression): Type;
-        getResolvedSignature(node: CallLikeExpression, candidatesOutArray?: Signature[]): Signature;
-        getSignatureFromDeclaration(declaration: SignatureDeclaration): Signature;
-        isImplementationOfOverload(node: FunctionLikeDeclaration): boolean;
+        getContextualType(node: Expression): Type | undefined;
+        getResolvedSignature(node: CallLikeExpression, candidatesOutArray?: Signature[]): Signature | undefined;
+        getSignatureFromDeclaration(declaration: SignatureDeclaration): Signature | undefined;
+        isImplementationOfOverload(node: FunctionLikeDeclaration): boolean | undefined;
         isUndefinedSymbol(symbol: Symbol): boolean;
         isArgumentsSymbol(symbol: Symbol): boolean;
         isUnknownSymbol(symbol: Symbol): boolean;
-        getConstantValue(node: EnumMember | PropertyAccessExpression | ElementAccessExpression): number;
+        getMergedSymbol(symbol: Symbol): Symbol;
+        getConstantValue(node: EnumMember | PropertyAccessExpression | ElementAccessExpression): string | number | undefined;
         isValidPropertyAccess(node: PropertyAccessExpression | QualifiedName, propertyName: string): boolean;
+        /** Follow all aliases to get the original symbol. */
         getAliasedSymbol(symbol: Symbol): Symbol;
+        /** Follow a *single* alias to get the immediately aliased symbol. */
+        getImmediateAliasedSymbol(symbol: Symbol): Symbol;
         getExportsOfModule(moduleSymbol: Symbol): Symbol[];
-        getJsxElementAttributesType(elementNode: JsxOpeningLikeElement): Type;
+        /** Unlike `getExportsOfModule`, this includes properties of an `export =` value. */
+        getExportsAndPropertiesOfModule(moduleSymbol: Symbol): Symbol[];
+        getAllAttributesTypeFromJsxOpeningLikeElement(elementNode: JsxOpeningLikeElement): Type | undefined;
         getJsxIntrinsicTagNames(): Symbol[];
         isOptionalParameter(node: ParameterDeclaration): boolean;
         getAmbientModules(): Symbol[];
+        tryGetMemberInModuleExports(memberName: string, moduleSymbol: Symbol): Symbol | undefined;
+        getApparentType(type: Type): Type;
+        getSuggestionForNonexistentProperty(node: Identifier, containingType: Type): string | undefined;
+        getSuggestionForNonexistentSymbol(location: Node, name: string, meaning: SymbolFlags): string | undefined;
+        getBaseConstraintOfType(type: Type): Type | undefined;
+        tryFindAmbientModuleWithoutAugmentations(moduleName: string): Symbol | undefined;
         getDiagnostics(sourceFile?: SourceFile, cancellationToken?: CancellationToken): Diagnostic[];
         getGlobalDiagnostics(): Diagnostic[];
         getEmitResolver(sourceFile?: SourceFile, cancellationToken?: CancellationToken): EmitResolver;
@@ -1397,11 +1902,37 @@ declare namespace ts {
         getIdentifierCount(): number;
         getSymbolCount(): number;
         getTypeCount(): number;
+        /**
+         * For a union, will include a property if it's defined in *any* of the member types.
+         * So for `{ a } | { b }`, this will include both `a` and `b`.
+         * Does not include properties of primitive types.
+         */
+        getAllPossiblePropertiesOfType(type: Type): Symbol[];
+        getJsxNamespace(): string;
+        resolveNameAtLocation(location: Node, name: string, meaning: SymbolFlags): Symbol | undefined;
+    }
+    enum NodeBuilderFlags {
+        None = 0,
+        NoTruncation = 1,
+        WriteArrayAsGenericType = 2,
+        WriteTypeArgumentsOfSignature = 32,
+        UseFullyQualifiedType = 64,
+        SuppressAnyReturnType = 256,
+        WriteTypeParametersInQualifiedName = 512,
+        AllowThisInObjectLiteral = 1024,
+        AllowQualifedNameInPlaceOfIdentifier = 2048,
+        AllowAnonymousIdentifier = 8192,
+        AllowEmptyUnionOrIntersection = 16384,
+        AllowEmptyTuple = 32768,
+        IgnoreErrors = 60416,
+        InObjectTypeLiteral = 1048576,
+        InTypeAlias = 8388608,
     }
     interface SymbolDisplayBuilder {
         buildTypeDisplay(type: Type, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
         buildSymbolDisplay(symbol: Symbol, writer: SymbolWriter, enclosingDeclaration?: Node, meaning?: SymbolFlags, flags?: SymbolFormatFlags): void;
-        buildSignatureDisplay(signatures: Signature, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags, kind?: SignatureKind): void;
+        buildSignatureDisplay(signature: Signature, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags, kind?: SignatureKind): void;
+        buildIndexSignatureDisplay(info: IndexInfo, writer: SymbolWriter, kind: IndexKind, enclosingDeclaration?: Node, globalFlags?: TypeFormatFlags, symbolStack?: Symbol[]): void;
         buildParameterDisplay(parameter: Symbol, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
         buildTypeParameterDisplay(tp: TypeParameter, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
         buildTypePredicateDisplay(predicate: TypePredicate, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
@@ -1417,6 +1948,7 @@ declare namespace ts {
         writeSpace(text: string): void;
         writeStringLiteral(text: string): void;
         writeParameter(text: string): void;
+        writeProperty(text: string): void;
         writeSymbol(text: string, symbol: Symbol): void;
         writeLine(): void;
         increaseIndent(): void;
@@ -1424,20 +1956,24 @@ declare namespace ts {
         clear(): void;
         trackSymbol(symbol: Symbol, enclosingDeclaration?: Node, meaning?: SymbolFlags): void;
         reportInaccessibleThisError(): void;
+        reportPrivateInBaseOfClassExpression(propertyName: string): void;
     }
     const enum TypeFormatFlags {
         None = 0,
         WriteArrayAsGenericType = 1,
-        UseTypeOfFunction = 2,
-        NoTruncation = 4,
-        WriteArrowStyleSignature = 8,
-        WriteOwnNameForAnyLike = 16,
-        WriteTypeArgumentsOfSignature = 32,
-        InElementType = 64,
-        UseFullyQualifiedType = 128,
-        InFirstTypeArgument = 256,
-        InTypeAlias = 512,
-        UseTypeAliasValue = 1024,
+        UseTypeOfFunction = 4,
+        NoTruncation = 8,
+        WriteArrowStyleSignature = 16,
+        WriteOwnNameForAnyLike = 32,
+        WriteTypeArgumentsOfSignature = 64,
+        InElementType = 128,
+        UseFullyQualifiedType = 256,
+        InFirstTypeArgument = 512,
+        InTypeAlias = 1024,
+        UseTypeAliasValue = 2048,
+        SuppressAnyReturnType = 4096,
+        AddUndefined = 8192,
+        WriteClassExpressionAsTypeLiteral = 16384,
     }
     const enum SymbolFormatFlags {
         None = 0,
@@ -1449,6 +1985,10 @@ declare namespace ts {
         NotAccessible = 1,
         CannotBeNamed = 2,
     }
+    const enum SyntheticSymbolKind {
+        UnionOrIntersection = 0,
+        Spread = 1,
+    }
     const enum TypePredicateKind {
         This = 0,
         Identifier = 1,
@@ -1458,9 +1998,10 @@ declare namespace ts {
         type: Type;
     }
     interface ThisTypePredicate extends TypePredicateBase {
-        _thisTypePredicateBrand: any;
+        kind: TypePredicateKind.This;
     }
     interface IdentifierTypePredicate extends TypePredicateBase {
+        kind: TypePredicateKind.Identifier;
         parameterName: string;
         parameterIndex: number;
     }
@@ -1475,8 +2016,7 @@ declare namespace ts {
     interface SymbolAccessibilityResult extends SymbolVisibilityResult {
         errorModuleName?: string;
     }
-    /** Indicates how to serialize the name for a TypeReferenceNode when emitting decorator
-      * metadata */
+    /** Indicates how to serialize the name for a TypeReferenceNode when emitting decorator metadata */
     enum TypeReferenceSerializationKind {
         Unknown = 0,
         TypeWithConstructSignatureAndValue = 1,
@@ -1502,14 +2042,15 @@ declare namespace ts {
         getNodeCheckFlags(node: Node): NodeCheckFlags;
         isDeclarationVisible(node: Declaration): boolean;
         collectLinkedAliases(node: Identifier): Node[];
-        isImplementationOfOverload(node: FunctionLikeDeclaration): boolean;
+        isImplementationOfOverload(node: FunctionLikeDeclaration): boolean | undefined;
+        isRequiredInitializedParameter(node: ParameterDeclaration): boolean;
+        isOptionalUninitializedParameterProperty(node: ParameterDeclaration): boolean;
         writeTypeOfDeclaration(declaration: AccessorDeclaration | VariableLikeDeclaration, enclosingDeclaration: Node, flags: TypeFormatFlags, writer: SymbolWriter): void;
         writeReturnTypeOfSignatureDeclaration(signatureDeclaration: SignatureDeclaration, enclosingDeclaration: Node, flags: TypeFormatFlags, writer: SymbolWriter): void;
         writeTypeOfExpression(expr: Expression, enclosingDeclaration: Node, flags: TypeFormatFlags, writer: SymbolWriter): void;
-        writeBaseConstructorTypeOfClass(node: ClassLikeDeclaration, enclosingDeclaration: Node, flags: TypeFormatFlags, writer: SymbolWriter): void;
         isSymbolAccessible(symbol: Symbol, enclosingDeclaration: Node, meaning: SymbolFlags, shouldComputeAliasToMarkVisible: boolean): SymbolAccessibilityResult;
         isEntityNameVisible(entityName: EntityNameOrEntityNameExpression, enclosingDeclaration: Node): SymbolVisibilityResult;
-        getConstantValue(node: EnumMember | PropertyAccessExpression | ElementAccessExpression): number;
+        getConstantValue(node: EnumMember | PropertyAccessExpression | ElementAccessExpression): string | number;
         getReferencedValueDeclaration(reference: Identifier): Declaration;
         getTypeReferenceSerializationKind(typeName: EntityName, location?: Node): TypeReferenceSerializationKind;
         isOptionalParameter(node: ParameterDeclaration): boolean;
@@ -1518,8 +2059,9 @@ declare namespace ts {
         getExternalModuleFileFromDeclaration(declaration: ImportEqualsDeclaration | ImportDeclaration | ExportDeclaration | ModuleDeclaration): SourceFile;
         getTypeReferenceDirectivesForEntityName(name: EntityNameOrEntityNameExpression): string[];
         getTypeReferenceDirectivesForSymbol(symbol: Symbol, meaning?: SymbolFlags): string[];
-        isLiteralConstDeclaration(node: VariableDeclaration): boolean;
-        writeLiteralConstValue(node: VariableDeclaration, writer: SymbolWriter): void;
+        isLiteralConstDeclaration(node: VariableDeclaration | PropertyDeclaration | PropertySignature | ParameterDeclaration): boolean;
+        writeLiteralConstValue(node: VariableDeclaration | PropertyDeclaration | PropertySignature | ParameterDeclaration, writer: SymbolWriter): void;
+        getJsxFactoryEntity(): EntityName;
     }
     const enum SymbolFlags {
         None = 0,
@@ -1547,13 +2089,10 @@ declare namespace ts {
         ExportType = 2097152,
         ExportNamespace = 4194304,
         Alias = 8388608,
-        Instantiated = 16777216,
-        Merged = 33554432,
-        Transient = 67108864,
-        Prototype = 134217728,
-        SyntheticProperty = 268435456,
-        Optional = 536870912,
-        ExportStar = 1073741824,
+        Prototype = 16777216,
+        ExportStar = 33554432,
+        Optional = 67108864,
+        Transient = 134217728,
         Enum = 384,
         Variable = 3,
         Value = 107455,
@@ -1597,7 +2136,6 @@ declare namespace ts {
         members?: SymbolTable;
         exports?: SymbolTable;
         globalExports?: SymbolTable;
-        isReadonly?: boolean;
         id?: number;
         mergeId?: number;
         parent?: Symbol;
@@ -1608,6 +2146,7 @@ declare namespace ts {
         isAssigned?: boolean;
     }
     interface SymbolLinks {
+        immediateTarget?: Symbol;
         target?: Symbol;
         type?: Type;
         declaredType?: Type;
@@ -1617,16 +2156,38 @@ declare namespace ts {
         mapper?: TypeMapper;
         referenced?: boolean;
         containingType?: UnionOrIntersectionType;
-        hasNonUniformType?: boolean;
-        isPartial?: boolean;
+        leftSpread?: Symbol;
+        rightSpread?: Symbol;
+        syntheticOrigin?: Symbol;
         isDiscriminantProperty?: boolean;
         resolvedExports?: SymbolTable;
         exportsChecked?: boolean;
+        typeParametersChecked?: boolean;
         isDeclarationWithCollidingName?: boolean;
         bindingElement?: BindingElement;
         exportsSomeValue?: boolean;
+        enumKind?: EnumKind;
+    }
+    const enum EnumKind {
+        Numeric = 0,
+        Literal = 1,
+    }
+    const enum CheckFlags {
+        Instantiated = 1,
+        SyntheticProperty = 2,
+        SyntheticMethod = 4,
+        Readonly = 8,
+        Partial = 16,
+        HasNonUniformType = 32,
+        ContainsPublic = 64,
+        ContainsProtected = 128,
+        ContainsPrivate = 256,
+        ContainsStatic = 512,
+        Synthetic = 6,
     }
     interface TransientSymbol extends Symbol, SymbolLinks {
+        checkFlags: CheckFlags;
+        isRestParameter?: boolean;
     }
     type SymbolTable = Map<Symbol>;
     /** Represents a "prefix*suffix" pattern. */
@@ -1643,6 +2204,7 @@ declare namespace ts {
         TypeChecked = 1,
         LexicalThis = 2,
         CaptureThis = 4,
+        CaptureNewTarget = 8,
         SuperInstance = 256,
         SuperStatic = 512,
         ContextChecked = 1024,
@@ -1667,11 +2229,13 @@ declare namespace ts {
         resolvedSignature?: Signature;
         resolvedSymbol?: Symbol;
         resolvedIndexInfo?: IndexInfo;
-        enumMemberValue?: number;
+        maybeTypePredicate?: boolean;
+        enumMemberValue?: string | number;
         isVisible?: boolean;
+        containsArgumentsReference?: boolean;
         hasReportedStatementInAmbientContext?: boolean;
         jsxFlags?: JsxFlags;
-        resolvedJsxType?: Type;
+        resolvedJsxElementAttributesType?: Type;
         hasSuperCall?: boolean;
         superCall?: ExpressionStatement;
         switchTypes?: Type[];
@@ -1692,45 +2256,42 @@ declare namespace ts {
         Null = 4096,
         Never = 8192,
         TypeParameter = 16384,
-        Class = 32768,
-        Interface = 65536,
-        Reference = 131072,
-        Tuple = 262144,
-        Union = 524288,
-        Intersection = 1048576,
-        Anonymous = 2097152,
-        Instantiated = 4194304,
-        ObjectLiteral = 8388608,
-        FreshLiteral = 16777216,
-        ContainsWideningType = 33554432,
-        ContainsObjectLiteral = 67108864,
-        ContainsAnyFunctionType = 134217728,
-        ThisType = 268435456,
-        ObjectLiteralPatternWithComputedProperties = 536870912,
+        Object = 32768,
+        Union = 65536,
+        Intersection = 131072,
+        Index = 262144,
+        IndexedAccess = 524288,
+        FreshLiteral = 1048576,
+        ContainsWideningType = 2097152,
+        ContainsObjectLiteral = 4194304,
+        ContainsAnyFunctionType = 8388608,
+        NonPrimitive = 16777216,
+        JsxAttributes = 33554432,
         Nullable = 6144,
-        Literal = 480,
+        Literal = 224,
         StringOrNumberLiteral = 96,
         DefinitelyFalsy = 7392,
         PossiblyFalsy = 7406,
-        Intrinsic = 16015,
+        Intrinsic = 16793231,
         Primitive = 8190,
-        StringLike = 34,
-        NumberLike = 340,
+        StringLike = 262178,
+        NumberLike = 84,
         BooleanLike = 136,
         EnumLike = 272,
-        ObjectType = 2588672,
-        UnionOrIntersection = 1572864,
-        StructuredType = 4161536,
-        StructuredOrTypeParameter = 4177920,
-        Narrowable = 4178943,
-        NotUnionOrUnit = 2589191,
-        RequiresWidening = 100663296,
-        PropagatingFlags = 234881024,
+        UnionOrIntersection = 196608,
+        StructuredType = 229376,
+        StructuredOrTypeVariable = 1032192,
+        TypeVariable = 540672,
+        Narrowable = 17810175,
+        NotUnionOrUnit = 16810497,
+        RequiresWidening = 6291456,
+        PropagatingFlags = 14680064,
     }
     type DestructuringPattern = BindingPattern | ObjectLiteralExpression | ArrayLiteralExpression;
     interface Type {
         flags: TypeFlags;
         id: number;
+        checker: TypeChecker;
         symbol?: Symbol;
         pattern?: DestructuringPattern;
         aliasSymbol?: Symbol;
@@ -1740,26 +2301,44 @@ declare namespace ts {
         intrinsicName: string;
     }
     interface LiteralType extends Type {
-        text: string;
+        value: string | number;
         freshType?: LiteralType;
         regularType?: LiteralType;
     }
+    interface StringLiteralType extends LiteralType {
+        value: string;
+    }
+    interface NumberLiteralType extends LiteralType {
+        value: number;
+    }
     interface EnumType extends Type {
-        memberTypes: Map<EnumLiteralType>;
     }
-    interface EnumLiteralType extends LiteralType {
-        baseType: EnumType & UnionType;
+    const enum ObjectFlags {
+        Class = 1,
+        Interface = 2,
+        Reference = 4,
+        Tuple = 8,
+        Anonymous = 16,
+        Mapped = 32,
+        Instantiated = 64,
+        ObjectLiteral = 128,
+        EvolvingArray = 256,
+        ObjectLiteralPatternWithComputedProperties = 512,
+        ClassOrInterface = 3,
     }
     interface ObjectType extends Type {
+        objectFlags: ObjectFlags;
     }
+    /** Class and interface types (TypeFlags.Class and TypeFlags.Interface). */
     interface InterfaceType extends ObjectType {
         typeParameters: TypeParameter[];
         outerTypeParameters: TypeParameter[];
         localTypeParameters: TypeParameter[];
         thisType: TypeParameter;
         resolvedBaseConstructorType?: Type;
-        resolvedBaseTypes: ObjectType[];
+        resolvedBaseTypes: BaseType[];
     }
+    type BaseType = ObjectType | IntersectionType;
     interface InterfaceTypeWithDeclaredMembers extends InterfaceType {
         declaredProperties: Symbol[];
         declaredCallSignatures: Signature[];
@@ -1767,26 +2346,53 @@ declare namespace ts {
         declaredStringIndexInfo: IndexInfo;
         declaredNumberIndexInfo: IndexInfo;
     }
+    /**
+     * Type references (TypeFlags.Reference). When a class or interface has type parameters or
+     * a "this" type, references to the class or interface are made using type references. The
+     * typeArguments property specifies the types to substitute for the type parameters of the
+     * class or interface and optionally includes an extra element that specifies the type to
+     * substitute for "this" in the resulting instantiation. When no extra argument is present,
+     * the type reference itself is substituted for "this". The typeArguments property is undefined
+     * if the class or interface has no type parameters and the reference isn't specifying an
+     * explicit "this" argument.
+     */
     interface TypeReference extends ObjectType {
         target: GenericType;
-        typeArguments: Type[];
+        typeArguments?: Type[];
     }
     interface GenericType extends InterfaceType, TypeReference {
         instantiations: Map<TypeReference>;
     }
     interface UnionOrIntersectionType extends Type {
         types: Type[];
-        resolvedProperties: SymbolTable;
-        couldContainTypeParameters: boolean;
+        propertyCache: SymbolTable;
+        resolvedProperties: Symbol[];
+        resolvedIndexType: IndexType;
+        resolvedBaseConstraint: Type;
+        couldContainTypeVariables: boolean;
     }
     interface UnionType extends UnionOrIntersectionType {
     }
     interface IntersectionType extends UnionOrIntersectionType {
+        resolvedApparentType: Type;
     }
+    type StructuredType = ObjectType | UnionType | IntersectionType;
     interface AnonymousType extends ObjectType {
         target?: AnonymousType;
         mapper?: TypeMapper;
     }
+    interface MappedType extends ObjectType {
+        declaration: MappedTypeNode;
+        typeParameter?: TypeParameter;
+        constraintType?: Type;
+        templateType?: Type;
+        modifiersType?: Type;
+        mapper?: TypeMapper;
+    }
+    interface EvolvingArrayType extends ObjectType {
+        elementType: Type;
+        finalArrayType?: Type;
+    }
     interface ResolvedType extends ObjectType, UnionOrIntersectionType {
         members: SymbolTable;
         properties: Symbol[];
@@ -1799,14 +2405,35 @@ declare namespace ts {
         regularType: ResolvedType;
     }
     interface IterableOrIteratorType extends ObjectType, UnionType {
-        iterableElementType?: Type;
-        iteratorElementType?: Type;
+        iteratedTypeOfIterable?: Type;
+        iteratedTypeOfIterator?: Type;
+        iteratedTypeOfAsyncIterable?: Type;
+        iteratedTypeOfAsyncIterator?: Type;
+    }
+    interface PromiseOrAwaitableType extends ObjectType, UnionType {
+        promiseTypeOfPromiseConstructor?: Type;
+        promisedTypeOfPromise?: Type;
+        awaitedTypeOfType?: Type;
+    }
+    interface TypeVariable extends Type {
+        resolvedBaseConstraint: Type;
+        resolvedIndexType: IndexType;
     }
-    interface TypeParameter extends Type {
+    interface TypeParameter extends TypeVariable {
         constraint: Type;
+        default?: Type;
         target?: TypeParameter;
         mapper?: TypeMapper;
-        resolvedApparentType: Type;
+        isThisType?: boolean;
+        resolvedDefaultType?: Type;
+    }
+    interface IndexedAccessType extends TypeVariable {
+        objectType: Type;
+        indexType: Type;
+        constraint?: Type;
+    }
+    interface IndexType extends Type {
+        type: TypeVariable | UnionOrIntersectionType;
     }
     const enum SignatureKind {
         Call = 0,
@@ -1814,7 +2441,7 @@ declare namespace ts {
     }
     interface Signature {
         declaration: SignatureDeclaration;
-        typeParameters: TypeParameter[];
+        typeParameters?: TypeParameter[];
         parameters: Symbol[];
         thisParameter?: Symbol;
         resolvedReturnType: Type;
@@ -1827,6 +2454,7 @@ declare namespace ts {
         erasedSignatureCache?: Signature;
         isolatedSignatureType?: ObjectType;
         typePredicate?: TypePredicate;
+        instantiations?: Map<Signature>;
     }
     const enum IndexKind {
         String = 0,
@@ -1840,23 +2468,30 @@ declare namespace ts {
     interface TypeMapper {
         (t: TypeParameter): Type;
         mappedTypes?: Type[];
-        targetTypes?: Type[];
         instantiations?: Type[];
-        context?: InferenceContext;
     }
-    interface TypeInferences {
-        primary: Type[];
-        secondary: Type[];
+    const enum InferencePriority {
+        NakedTypeVariable = 1,
+        MappedType = 2,
+        ReturnType = 4,
+    }
+    interface InferenceInfo {
+        typeParameter: TypeParameter;
+        candidates: Type[];
+        inferredType: Type;
+        priority: InferencePriority;
         topLevel: boolean;
         isFixed: boolean;
     }
-    interface InferenceContext {
+    const enum InferenceFlags {
+        InferUnionTypes = 1,
+        NoDefault = 2,
+        AnyDefault = 4,
+    }
+    interface InferenceContext extends TypeMapper {
         signature: Signature;
-        inferUnionTypes: boolean;
-        inferences: TypeInferences[];
-        inferredTypes: Type[];
-        mapper?: TypeMapper;
-        failedTypeParameterIndex?: number;
+        inferences: InferenceInfo[];
+        flags: InferenceFlags;
     }
     const enum SpecialPropertyAssignmentKind {
         None = 0,
@@ -1864,6 +2499,11 @@ declare namespace ts {
         ModuleExports = 2,
         PrototypeProperty = 3,
         ThisProperty = 4,
+        Property = 5,
+    }
+    interface JsFileExtensionInfo {
+        extension: string;
+        isMixedContent: boolean;
     }
     interface DiagnosticMessage {
         key: string;
@@ -1884,12 +2524,13 @@ declare namespace ts {
         next?: DiagnosticMessageChain;
     }
     interface Diagnostic {
-        file: SourceFile;
-        start: number;
-        length: number;
+        file: SourceFile | undefined;
+        start: number | undefined;
+        length: number | undefined;
         messageText: string | DiagnosticMessageChain;
         category: DiagnosticCategory;
         code: number;
+        source?: string;
     }
     enum DiagnosticCategory {
         Warning = 0,
@@ -1900,24 +2541,29 @@ declare namespace ts {
         Classic = 1,
         NodeJs = 2,
     }
-    type RootPaths = string[];
-    type PathSubstitutions = MapLike<string[]>;
-    type TsConfigOnlyOptions = RootPaths | PathSubstitutions;
-    type CompilerOptionsValue = string | number | boolean | (string | number)[] | TsConfigOnlyOptions;
+    interface PluginImport {
+        name: string;
+    }
+    type CompilerOptionsValue = string | number | boolean | (string | number)[] | string[] | MapLike<string[]> | PluginImport[];
     interface CompilerOptions {
+        all?: boolean;
         allowJs?: boolean;
         allowNonTsExtensions?: boolean;
         allowSyntheticDefaultImports?: boolean;
         allowUnreachableCode?: boolean;
         allowUnusedLabels?: boolean;
+        alwaysStrict?: boolean;
         baseUrl?: string;
         charset?: string;
+        checkJs?: boolean;
         configFilePath?: string;
+        readonly configFile?: JsonSourceFile;
         declaration?: boolean;
         declarationDir?: string;
         diagnostics?: boolean;
         extendedDiagnostics?: boolean;
         disableSizeLimit?: boolean;
+        downlevelIteration?: boolean;
         emitBOM?: boolean;
         emitDecoratorMetadata?: boolean;
         experimentalDecorators?: boolean;
@@ -1939,6 +2585,7 @@ declare namespace ts {
         moduleResolution?: ModuleResolutionKind;
         newLine?: NewLineKind;
         noEmit?: boolean;
+        noEmitForJsFiles?: boolean;
         noEmitHelpers?: boolean;
         noEmitOnError?: boolean;
         noErrorTruncation?: boolean;
@@ -1946,6 +2593,7 @@ declare namespace ts {
         noImplicitAny?: boolean;
         noImplicitReturns?: boolean;
         noImplicitThis?: boolean;
+        noStrictGenericChecks?: boolean;
         noUnusedLocals?: boolean;
         noUnusedParameters?: boolean;
         noImplicitUseStrict?: boolean;
@@ -1954,18 +2602,21 @@ declare namespace ts {
         out?: string;
         outDir?: string;
         outFile?: string;
-        paths?: PathSubstitutions;
+        paths?: MapLike<string[]>;
+        plugins?: PluginImport[];
         preserveConstEnums?: boolean;
         project?: string;
         pretty?: DiagnosticStyle;
         reactNamespace?: string;
+        jsxFactory?: string;
         removeComments?: boolean;
         rootDir?: string;
-        rootDirs?: RootPaths;
+        rootDirs?: string[];
         skipLibCheck?: boolean;
         skipDefaultLibCheck?: boolean;
         sourceMap?: boolean;
         sourceRoot?: string;
+        strict?: boolean;
         strictNullChecks?: boolean;
         stripInternal?: boolean;
         suppressExcessPropertyErrors?: boolean;
@@ -1974,14 +2625,15 @@ declare namespace ts {
         target?: ScriptTarget;
         traceResolution?: boolean;
         types?: string[];
-        /** Paths used to used to compute primary types search locations */
+        /** Paths used to compute primary types search locations */
         typeRoots?: string[];
         version?: boolean;
         watch?: boolean;
-        [option: string]: CompilerOptionsValue | undefined;
+        [option: string]: CompilerOptionsValue | JsonSourceFile | undefined;
     }
-    interface TypingOptions {
+    interface TypeAcquisition {
         enableAutoDiscovery?: boolean;
+        enable?: boolean;
         include?: string[];
         exclude?: string[];
         [option: string]: string[] | boolean | undefined;
@@ -1991,8 +2643,9 @@ declare namespace ts {
         projectRootPath: string;
         safeListPath: string;
         packageNameToTypingLocation: Map<string>;
-        typingOptions: TypingOptions;
+        typeAcquisition: TypeAcquisition;
         compilerOptions: CompilerOptions;
+        unresolvedImports: ReadonlyArray<string>;
     }
     enum ModuleKind {
         None = 0,
@@ -2000,13 +2653,14 @@ declare namespace ts {
         AMD = 2,
         UMD = 3,
         System = 4,
-        ES6 = 5,
         ES2015 = 5,
+        ESNext = 6,
     }
     const enum JsxEmit {
         None = 0,
         Preserve = 1,
         React = 2,
+        ReactNative = 3,
     }
     const enum NewLineKind {
         CarriageReturnLineFeed = 0,
@@ -2022,13 +2676,17 @@ declare namespace ts {
         JSX = 2,
         TS = 3,
         TSX = 4,
+        External = 5,
+        JSON = 6,
     }
     const enum ScriptTarget {
         ES3 = 0,
         ES5 = 1,
-        ES6 = 2,
         ES2015 = 2,
-        Latest = 2,
+        ES2016 = 3,
+        ES2017 = 4,
+        ESNext = 5,
+        Latest = 5,
     }
     const enum LanguageVariant {
         Standard = 0,
@@ -2038,9 +2696,10 @@ declare namespace ts {
         Simple = 0,
         Pretty = 1,
     }
+    /** Either a parsed command line or a parsed tsconfig.json */
     interface ParsedCommandLine {
         options: CompilerOptions;
-        typingOptions?: TypingOptions;
+        typeAcquisition?: TypeAcquisition;
         fileNames: string[];
         raw?: any;
         errors: Diagnostic[];
@@ -2062,8 +2721,10 @@ declare namespace ts {
         shortName?: string;
         description?: DiagnosticMessage;
         paramType?: DiagnosticMessage;
-        experimental?: boolean;
         isTSConfigOnly?: boolean;
+        isCommandLineOnly?: boolean;
+        showInSimplifiedHelpView?: boolean;
+        category?: DiagnosticMessage;
     }
     interface CommandLineOptionOfPrimitiveType extends CommandLineOptionBase {
         type: "string" | "number" | "boolean";
@@ -2073,10 +2734,12 @@ declare namespace ts {
     }
     interface TsConfigOnlyOption extends CommandLineOptionBase {
         type: "object";
+        elementOptions?: Map<CommandLineOption>;
+        extraKeyDiagnosticMessage?: DiagnosticMessage;
     }
     interface CommandLineOptionOfListType extends CommandLineOptionBase {
         type: "list";
-        element: CommandLineOptionOfCustomType | CommandLineOptionOfPrimitiveType;
+        element: CommandLineOptionOfCustomType | CommandLineOptionOfPrimitiveType | TsConfigOnlyOption;
     }
     type CommandLineOption = CommandLineOptionOfCustomType | CommandLineOptionOfPrimitiveType | TsConfigOnlyOption | CommandLineOptionOfListType;
     const enum CharacterCodes {
@@ -2214,12 +2877,44 @@ declare namespace ts {
         getCurrentDirectory?(): string;
         getDirectories?(path: string): string[];
     }
+    /**
+     * Represents the result of module resolution.
+     * Module resolution will pick up tsx/jsx/js files even if '--jsx' and '--allowJs' are turned off.
+     * The Program will then filter results based on these flags.
+     *
+     * Prefer to return a `ResolvedModuleFull` so that the file type does not have to be inferred.
+     */
     interface ResolvedModule {
+        /** Path of the file the module was resolved to. */
         resolvedFileName: string;
+        /**
+         * Denotes if 'resolvedFileName' is isExternalLibraryImport and thus should be a proper external module:
+         * - be a .d.ts file
+         * - use top level imports\exports
+         * - don't use tripleslash references
+         */
         isExternalLibraryImport?: boolean;
     }
+    /**
+     * ResolvedModule with an explicitly provided `extension` property.
+     * Prefer this over `ResolvedModule`.
+     */
+    interface ResolvedModuleFull extends ResolvedModule {
+        /**
+         * Extension of resolvedFileName. This must match what's at the end of resolvedFileName.
+         * This is optional for backwards-compatibility, but will be added if not provided.
+         */
+        extension: Extension;
+    }
+    const enum Extension {
+        Ts = ".ts",
+        Tsx = ".tsx",
+        Dts = ".d.ts",
+        Js = ".js",
+        Jsx = ".jsx",
+    }
     interface ResolvedModuleWithFailedLookupLocations {
-        resolvedModule: ResolvedModule;
+        resolvedModule: ResolvedModuleFull | undefined;
         failedLookupLocations: string[];
     }
     interface ResolvedTypeReferenceDirective {
@@ -2253,148 +2948,402 @@ declare namespace ts {
         None = 0,
         TypeScript = 1,
         ContainsTypeScript = 2,
-        Jsx = 4,
-        ContainsJsx = 8,
-        ES7 = 16,
-        ContainsES7 = 32,
-        ES6 = 64,
-        ContainsES6 = 128,
-        DestructuringAssignment = 256,
-        Generator = 512,
-        ContainsGenerator = 1024,
-        ContainsDecorators = 2048,
-        ContainsPropertyInitializer = 4096,
-        ContainsLexicalThis = 8192,
-        ContainsCapturedLexicalThis = 16384,
-        ContainsLexicalThisInComputedPropertyName = 32768,
-        ContainsDefaultValueAssignments = 65536,
-        ContainsParameterPropertyAssignments = 131072,
-        ContainsSpreadElementExpression = 262144,
-        ContainsComputedPropertyName = 524288,
-        ContainsBlockScopedBinding = 1048576,
-        ContainsBindingPattern = 2097152,
-        ContainsYield = 4194304,
-        ContainsHoistedDeclarationOrCompletion = 8388608,
+        ContainsJsx = 4,
+        ContainsESNext = 8,
+        ContainsES2017 = 16,
+        ContainsES2016 = 32,
+        ES2015 = 64,
+        ContainsES2015 = 128,
+        Generator = 256,
+        ContainsGenerator = 512,
+        DestructuringAssignment = 1024,
+        ContainsDestructuringAssignment = 2048,
+        ContainsDecorators = 4096,
+        ContainsPropertyInitializer = 8192,
+        ContainsLexicalThis = 16384,
+        ContainsCapturedLexicalThis = 32768,
+        ContainsLexicalThisInComputedPropertyName = 65536,
+        ContainsDefaultValueAssignments = 131072,
+        ContainsParameterPropertyAssignments = 262144,
+        ContainsSpread = 524288,
+        ContainsObjectSpread = 1048576,
+        ContainsRest = 524288,
+        ContainsObjectRest = 1048576,
+        ContainsComputedPropertyName = 2097152,
+        ContainsBlockScopedBinding = 4194304,
+        ContainsBindingPattern = 8388608,
+        ContainsYield = 16777216,
+        ContainsHoistedDeclarationOrCompletion = 33554432,
+        ContainsDynamicImport = 67108864,
         HasComputedFlags = 536870912,
         AssertTypeScript = 3,
-        AssertJsx = 12,
-        AssertES7 = 48,
-        AssertES6 = 192,
-        AssertGenerator = 1536,
-        NodeExcludes = 536871765,
-        ArrowFunctionExcludes = 550710101,
-        FunctionExcludes = 550726485,
-        ConstructorExcludes = 550593365,
-        MethodOrAccessorExcludes = 550593365,
-        ClassExcludes = 537590613,
-        ModuleExcludes = 546335573,
+        AssertJsx = 4,
+        AssertESNext = 8,
+        AssertES2017 = 16,
+        AssertES2016 = 32,
+        AssertES2015 = 192,
+        AssertGenerator = 768,
+        AssertDestructuringAssignment = 3072,
+        NodeExcludes = 536872257,
+        ArrowFunctionExcludes = 601249089,
+        FunctionExcludes = 601281857,
+        ConstructorExcludes = 601015617,
+        MethodOrAccessorExcludes = 601015617,
+        ClassExcludes = 539358529,
+        ModuleExcludes = 574674241,
         TypeExcludes = -3,
-        ObjectLiteralExcludes = 537430869,
-        ArrayLiteralOrCallOrNewExcludes = 537133909,
-        VariableDeclarationListExcludes = 538968917,
-        ParameterExcludes = 538968917,
-        TypeScriptClassSyntaxMask = 137216,
-        ES6FunctionSyntaxMask = 81920,
+        ObjectLiteralExcludes = 540087617,
+        ArrayLiteralOrCallOrNewExcludes = 537396545,
+        VariableDeclarationListExcludes = 546309441,
+        ParameterExcludes = 536872257,
+        CatchClauseExcludes = 537920833,
+        BindingPatternExcludes = 537396545,
+        TypeScriptClassSyntaxMask = 274432,
+        ES2015FunctionSyntaxMask = 163840,
+    }
+    interface SourceMapRange extends TextRange {
+        source?: SourceMapSource;
+    }
+    interface SourceMapSource {
+        fileName: string;
+        text: string;
+        lineMap: number[];
+        skipTrivia?: (pos: number) => number;
     }
     interface EmitNode {
+        annotatedNodes?: Node[];
         flags?: EmitFlags;
+        leadingComments?: SynthesizedComment[];
+        trailingComments?: SynthesizedComment[];
         commentRange?: TextRange;
-        sourceMapRange?: TextRange;
-        tokenSourceMapRanges?: Map<TextRange>;
-        annotatedNodes?: Node[];
-        constantValue?: number;
+        sourceMapRange?: SourceMapRange;
+        tokenSourceMapRanges?: SourceMapRange[];
+        constantValue?: string | number;
+        externalHelpersModuleName?: Identifier;
+        helpers?: EmitHelper[];
     }
     const enum EmitFlags {
-        EmitEmitHelpers = 1,
-        EmitExportStar = 2,
-        EmitSuperHelper = 4,
-        EmitAdvancedSuperHelper = 8,
-        UMDDefine = 16,
-        SingleLine = 32,
-        AdviseOnEmitNode = 64,
-        NoSubstitution = 128,
-        CapturesThis = 256,
-        NoLeadingSourceMap = 512,
-        NoTrailingSourceMap = 1024,
-        NoSourceMap = 1536,
-        NoNestedSourceMaps = 2048,
-        NoTokenLeadingSourceMaps = 4096,
-        NoTokenTrailingSourceMaps = 8192,
-        NoTokenSourceMaps = 12288,
-        NoLeadingComments = 16384,
-        NoTrailingComments = 32768,
-        NoComments = 49152,
-        NoNestedComments = 65536,
-        ExportName = 131072,
-        LocalName = 262144,
-        Indented = 524288,
-        NoIndentation = 1048576,
-        AsyncFunctionBody = 2097152,
-        ReuseTempVariableScope = 4194304,
-        CustomPrologue = 8388608,
-    }
-    const enum EmitContext {
+        SingleLine = 1,
+        AdviseOnEmitNode = 2,
+        NoSubstitution = 4,
+        CapturesThis = 8,
+        NoLeadingSourceMap = 16,
+        NoTrailingSourceMap = 32,
+        NoSourceMap = 48,
+        NoNestedSourceMaps = 64,
+        NoTokenLeadingSourceMaps = 128,
+        NoTokenTrailingSourceMaps = 256,
+        NoTokenSourceMaps = 384,
+        NoLeadingComments = 512,
+        NoTrailingComments = 1024,
+        NoComments = 1536,
+        NoNestedComments = 2048,
+        HelperName = 4096,
+        ExportName = 8192,
+        LocalName = 16384,
+        InternalName = 32768,
+        Indented = 65536,
+        NoIndentation = 131072,
+        AsyncFunctionBody = 262144,
+        ReuseTempVariableScope = 524288,
+        CustomPrologue = 1048576,
+        NoHoisting = 2097152,
+        HasEndOfDeclarationMarker = 4194304,
+        Iterator = 8388608,
+        NoAsciiEscaping = 16777216,
+    }
+    interface EmitHelper {
+        readonly name: string;
+        readonly scoped: boolean;
+        readonly text: string;
+        readonly priority?: number;
+    }
+    /**
+     * Used by the checker, this enum keeps track of external emit helpers that should be type
+     * checked.
+     */
+    const enum ExternalEmitHelpers {
+        Extends = 1,
+        Assign = 2,
+        Rest = 4,
+        Decorate = 8,
+        Metadata = 16,
+        Param = 32,
+        Awaiter = 64,
+        Generator = 128,
+        Values = 256,
+        Read = 512,
+        Spread = 1024,
+        Await = 2048,
+        AsyncGenerator = 4096,
+        AsyncDelegator = 8192,
+        AsyncValues = 16384,
+        ExportStar = 32768,
+        ForOfIncludes = 256,
+        ForAwaitOfIncludes = 16384,
+        AsyncGeneratorIncludes = 6144,
+        AsyncDelegatorIncludes = 26624,
+        SpreadIncludes = 1536,
+        FirstEmitHelper = 1,
+        LastEmitHelper = 32768,
+    }
+    const enum EmitHint {
         SourceFile = 0,
         Expression = 1,
         IdentifierName = 2,
         Unspecified = 3,
     }
-    /** Additional context provided to `visitEachChild` */
-    interface LexicalEnvironment {
+    interface EmitHost extends ScriptReferenceHost {
+        getSourceFiles(): SourceFile[];
+        isSourceFileFromExternalLibrary(file: SourceFile): boolean;
+        getCommonSourceDirectory(): string;
+        getCanonicalFileName(fileName: string): string;
+        getNewLine(): string;
+        isEmitBlocked(emitFileName: string): boolean;
+        writeFile: WriteFileCallback;
+    }
+    interface TransformationContext {
+        getEmitResolver(): EmitResolver;
+        getEmitHost(): EmitHost;
+        /** Gets the compiler options supplied to the transformer. */
+        getCompilerOptions(): CompilerOptions;
         /** Starts a new lexical environment. */
         startLexicalEnvironment(): void;
+        /** Suspends the current lexical environment, usually after visiting a parameter list. */
+        suspendLexicalEnvironment(): void;
+        /** Resumes a suspended lexical environment, usually before visiting a function body. */
+        resumeLexicalEnvironment(): void;
         /** Ends a lexical environment, returning any declarations. */
         endLexicalEnvironment(): Statement[];
+        /** Hoists a function declaration to the containing scope. */
+        hoistFunctionDeclaration(node: FunctionDeclaration): void;
+        /** Hoists a variable declaration to the containing scope. */
+        hoistVariableDeclaration(node: Identifier): void;
+        /** Records a request for a non-scoped emit helper in the current context. */
+        requestEmitHelper(helper: EmitHelper): void;
+        /** Gets and resets the requested non-scoped emit helpers. */
+        readEmitHelpers(): EmitHelper[] | undefined;
+        /** Enables expression substitutions in the pretty printer for the provided SyntaxKind. */
+        enableSubstitution(kind: SyntaxKind): void;
+        /** Determines whether expression substitutions are enabled for the provided node. */
+        isSubstitutionEnabled(node: Node): boolean;
+        /**
+         * Hook used by transformers to substitute expressions just before they
+         * are emitted by the pretty printer.
+         *
+         * NOTE: Transformation hooks should only be modified during `Transformer` initialization,
+         * before returning the `NodeTransformer` callback.
+         */
+        onSubstituteNode: (hint: EmitHint, node: Node) => Node;
+        /**
+         * Enables before/after emit notifications in the pretty printer for the provided
+         * SyntaxKind.
+         */
+        enableEmitNotification(kind: SyntaxKind): void;
+        /**
+         * Determines whether before/after emit notifications should be raised in the pretty
+         * printer when it emits a node.
+         */
+        isEmitNotificationEnabled(node: Node): boolean;
+        /**
+         * Hook used to allow transformers to capture state before or after
+         * the printer emits a node.
+         *
+         * NOTE: Transformation hooks should only be modified during `Transformer` initialization,
+         * before returning the `NodeTransformer` callback.
+         */
+        onEmitNode: (hint: EmitHint, node: Node, emitCallback: (hint: EmitHint, node: Node) => void) => void;
     }
-    interface TextSpan {
-        start: number;
-        length: number;
-    }
-    interface TextChangeRange {
-        span: TextSpan;
-        newLength: number;
-    }
-    interface DiagnosticCollection {
-        add(diagnostic: Diagnostic): void;
-        getGlobalDiagnostics(): Diagnostic[];
-        getDiagnostics(fileName?: string): Diagnostic[];
-        getModificationCount(): number;
-        reattachFileDiagnostics(newFile: SourceFile): void;
-    }
-    interface SyntaxList extends Node {
-        _children: Node[];
+    interface TransformationResult<T extends Node> {
+        /** Gets the transformed source files. */
+        transformed: T[];
+        /** Gets diagnostics for the transformation. */
+        diagnostics?: Diagnostic[];
+        /**
+         * Gets a substitute for a node, if one is available; otherwise, returns the original node.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to substitute.
+         */
+        substituteNode(hint: EmitHint, node: Node): Node;
+        /**
+         * Emits a node with possible notification.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to emit.
+         * @param emitCallback A callback used to emit the node.
+         */
+        emitNodeWithNotification(hint: EmitHint, node: Node, emitCallback: (hint: EmitHint, node: Node) => void): void;
+        /**
+         * Clean up EmitNode entries on any parse-tree nodes.
+         */
+        dispose(): void;
     }
-}
-declare namespace ts {
-    /** Gets a timestamp with (at least) ms resolution */
-    const timestamp: () => number;
-}
-/** Performance measurements for the compiler. */
-declare namespace ts.performance {
     /**
-     * Marks a performance event.
-     *
-     * @param markName The name of the mark.
+     * A function that is used to initialize and return a `Transformer` callback, which in turn
+     * will be used to transform one or more nodes.
      */
-    function mark(markName: string): void;
+    type TransformerFactory<T extends Node> = (context: TransformationContext) => Transformer<T>;
     /**
-     * Adds a performance measurement with the specified name.
-     *
-     * @param measureName The name of the performance measurement.
-     * @param startMarkName The name of the starting mark. If not supplied, the point at which the
-     *      profiler was enabled is used.
-     * @param endMarkName The name of the ending mark. If not supplied, the current timestamp is
-     *      used.
+     * A function that transforms a node.
      */
-    function measure(measureName: string, startMarkName?: string, endMarkName?: string): void;
+    type Transformer<T extends Node> = (node: T) => T;
     /**
-     * Gets the number of times a marker was encountered.
-     *
-     * @param markName The name of the mark.
+     * A function that accepts and possibly transforms a node.
      */
-    function getCount(markName: string): number;
-    /**
-     * Gets the total duration of all measurements with the supplied name.
+    type Visitor = (node: Node) => VisitResult<Node>;
+    type VisitResult<T extends Node> = T | T[];
+    interface Printer {
+        /**
+         * Print a node and its subtree as-is, without any emit transformations.
+         * @param hint A value indicating the purpose of a node. This is primarily used to
+         * distinguish between an `Identifier` used in an expression position, versus an
+         * `Identifier` used as an `IdentifierName` as part of a declaration. For most nodes you
+         * should just pass `Unspecified`.
+         * @param node The node to print. The node and its subtree are printed as-is, without any
+         * emit transformations.
+         * @param sourceFile A source file that provides context for the node. The source text of
+         * the file is used to emit the original source content for literals and identifiers, while
+         * the identifiers of the source file are used when generating unique names to avoid
+         * collisions.
+         */
+        printNode(hint: EmitHint, node: Node, sourceFile: SourceFile): string;
+        /**
+         * Prints a source file as-is, without any emit transformations.
+         */
+        printFile(sourceFile: SourceFile): string;
+        /**
+         * Prints a bundle of source files as-is, without any emit transformations.
+         */
+        printBundle(bundle: Bundle): string;
+        writeNode(hint: EmitHint, node: Node, sourceFile: SourceFile | undefined, writer: EmitTextWriter): void;
+        writeFile(sourceFile: SourceFile, writer: EmitTextWriter): void;
+        writeBundle(bundle: Bundle, writer: EmitTextWriter): void;
+    }
+    interface PrintHandlers {
+        /**
+         * A hook used by the Printer when generating unique names to avoid collisions with
+         * globally defined names that exist outside of the current source file.
+         */
+        hasGlobalName?(name: string): boolean;
+        /**
+         * A hook used by the Printer to provide notifications prior to emitting a node. A
+         * compatible implementation **must** invoke `emitCallback` with the provided `hint` and
+         * `node` values.
+         * @param hint A hint indicating the intended purpose of the node.
+         * @param node The node to emit.
+         * @param emitCallback A callback that, when invoked, will emit the node.
+         * @example
+         * ```ts
+         * var printer = createPrinter(printerOptions, {
+         *   onEmitNode(hint, node, emitCallback) {
+         *     // set up or track state prior to emitting the node...
+         *     emitCallback(hint, node);
+         *     // restore state after emitting the node...
+         *   }
+         * });
+         * ```
+         */
+        onEmitNode?(hint: EmitHint, node: Node, emitCallback: (hint: EmitHint, node: Node) => void): void;
+        /**
+         * A hook used by the Printer to perform just-in-time substitution of a node. This is
+         * primarily used by node transformations that need to substitute one node for another,
+         * such as replacing `myExportedVar` with `exports.myExportedVar`.
+         * @param hint A hint indicating the intended purpose of the node.
+         * @param node The node to emit.
+         * @example
+         * ```ts
+         * var printer = createPrinter(printerOptions, {
+         *   substituteNode(hint, node) {
+         *     // perform substitution if necessary...
+         *     return node;
+         *   }
+         * });
+         * ```
+         */
+        substituteNode?(hint: EmitHint, node: Node): Node;
+        onEmitSourceMapOfNode?: (hint: EmitHint, node: Node, emitCallback: (hint: EmitHint, node: Node) => void) => void;
+        onEmitSourceMapOfToken?: (node: Node, token: SyntaxKind, pos: number, emitCallback: (token: SyntaxKind, pos: number) => number) => number;
+        onEmitSourceMapOfPosition?: (pos: number) => void;
+        onEmitHelpers?: (node: Node, writeLines: (text: string) => void) => void;
+        onSetSourceFile?: (node: SourceFile) => void;
+        onBeforeEmitNodeArray?: (nodes: NodeArray<any>) => void;
+        onAfterEmitNodeArray?: (nodes: NodeArray<any>) => void;
+        onBeforeEmitToken?: (node: Node) => void;
+        onAfterEmitToken?: (node: Node) => void;
+    }
+    interface PrinterOptions {
+        removeComments?: boolean;
+        newLine?: NewLineKind;
+        sourceMap?: boolean;
+        inlineSourceMap?: boolean;
+        extendedDiagnostics?: boolean;
+    }
+    interface EmitTextWriter {
+        write(s: string): void;
+        writeTextOfNode(text: string, node: Node): void;
+        writeLine(): void;
+        increaseIndent(): void;
+        decreaseIndent(): void;
+        getText(): string;
+        rawWrite(s: string): void;
+        writeLiteral(s: string): void;
+        getTextPos(): number;
+        getLine(): number;
+        getColumn(): number;
+        getIndent(): number;
+        isAtStartOfLine(): boolean;
+        reset(): void;
+    }
+    interface TextSpan {
+        start: number;
+        length: number;
+    }
+    interface TextChangeRange {
+        span: TextSpan;
+        newLength: number;
+    }
+    interface DiagnosticCollection {
+        add(diagnostic: Diagnostic): void;
+        getGlobalDiagnostics(): Diagnostic[];
+        getDiagnostics(fileName?: string): Diagnostic[];
+        getModificationCount(): number;
+        reattachFileDiagnostics(newFile: SourceFile): void;
+    }
+    interface SyntaxList extends Node {
+        _children: Node[];
+    }
+}
+declare namespace ts {
+    /** Gets a timestamp with (at least) ms resolution */
+    const timestamp: () => number;
+}
+/** Performance measurements for the compiler. */
+declare namespace ts.performance {
+    /**
+     * Marks a performance event.
+     *
+     * @param markName The name of the mark.
+     */
+    function mark(markName: string): void;
+    /**
+     * Adds a performance measurement with the specified name.
+     *
+     * @param measureName The name of the performance measurement.
+     * @param startMarkName The name of the starting mark. If not supplied, the point at which the
+     *      profiler was enabled is used.
+     * @param endMarkName The name of the ending mark. If not supplied, the current timestamp is
+     *      used.
+     */
+    function measure(measureName: string, startMarkName?: string, endMarkName?: string): void;
+    /**
+     * Gets the number of times a marker was encountered.
+     *
+     * @param markName The name of the mark.
+     */
+    function getCount(markName: string): number;
+    /**
+     * Gets the total duration of all measurements with the supplied name.
      *
      * @param measureName The name of the measure whose durations should be accumulated.
      */
@@ -2410,6 +3359,10 @@ declare namespace ts.performance {
     /** Disables performance measurements for the compiler. */
     function disable(): void;
 }
+declare namespace ts {
+    /** The version of the TypeScript compiler release */
+    const version = "2.5.0";
+}
 declare namespace ts {
     /**
      * Ternary values are defined such that
@@ -2425,7 +3378,13 @@ declare namespace ts {
         Maybe = 1,
         True = -1,
     }
-    function createMap<T>(template?: MapLike<T>): Map<T>;
+    const collator: {
+        compare(a: string, b: string): number;
+    };
+    const localeCompareIsCorrect: boolean;
+    /** Create a new map. If a template object is provided, the map will copy entries from it. */
+    function createMap<T>(): Map<T>;
+    function createMapFromTemplate<T>(template?: MapLike<T>): Map<T>;
     function createFileMap<T>(keyMapper?: (key: string) => string): FileMap<T>;
     function toPath(fileName: string, basePath: string, getCanonicalFileName: (path: string) => string): Path;
     const enum Comparison {
@@ -2433,12 +3392,23 @@ declare namespace ts {
         EqualTo = 0,
         GreaterThan = 1,
     }
+    function length(array: any[]): number;
     /**
      * Iterates through 'array' by index and performs the callback on each element of array until the callback
      * returns a truthy value, then returns that value.
      * If no such value is found, the callback is applied to each element of array and undefined is returned.
      */
     function forEach<T, U>(array: T[] | undefined, callback: (element: T, index: number) => U | undefined): U | undefined;
+    /**
+     * Iterates through the parent chain of a node and performs the callback on each parent until the callback
+     * returns a truthy value, then returns that value.
+     * If no such value is found, it applies the callback until the parent pointer is undefined or the callback returns "quit"
+     * At that point findAncestor returns undefined.
+     */
+    function findAncestor<T extends Node>(node: Node, callback: (element: Node) => element is T): T | undefined;
+    function findAncestor(node: Node, callback: (element: Node) => boolean | "quit"): Node | undefined;
+    function zipWith<T, U>(arrayA: T[], arrayB: U[], callback: (a: T, b: U, index: number) => void): void;
+    function zipToMap<T>(keys: string[], values: T[]): Map<T>;
     /**
      * Iterates through `array` by index and performs the callback on each element of array until the callback
      * returns a falsey value, then returns false.
@@ -2447,6 +3417,8 @@ declare namespace ts {
     function every<T>(array: T[], callback: (element: T, index: number) => boolean): boolean;
     /** Works like Array.prototype.find, returning `undefined` if no element satisfying the predicate is found. */
     function find<T>(array: T[], predicate: (element: T, index: number) => boolean): T | undefined;
+    /** Works like Array.prototype.findIndex, returning `-1` if no element satisfying the predicate is found. */
+    function findIndex<T>(array: T[], predicate: (element: T, index: number) => boolean): number;
     /**
      * Returns the first truthy result of `callback`, or else fails.
      * This is like `forEach`, but never returns undefined.
@@ -2465,6 +3437,7 @@ declare namespace ts {
     function removeWhere<T>(array: T[], f: (x: T) => boolean): boolean;
     function filterMutate<T>(array: T[], f: (x: T) => boolean): void;
     function map<T, U>(array: T[], f: (x: T, i: number) => U): U[];
+    function sameMap<T>(array: T[], f: (x: T, i: number) => T): T[];
     /**
      * Flattens an array containing a mix of array or non-array elements.
      *
@@ -2477,7 +3450,16 @@ declare namespace ts {
      * @param array The array to map.
      * @param mapfn The callback used to map the result into one or more values.
      */
-    function flatMap<T, U>(array: T[], mapfn: (x: T, i: number) => U | U[]): U[];
+    function flatMap<T, U>(array: T[] | undefined, mapfn: (x: T, i: number) => U | U[] | undefined): U[] | undefined;
+    /**
+     * Maps an array. If the mapped value is an array, it is spread into the result.
+     * Avoids allocation if all elements map to themselves.
+     *
+     * @param array The array to map.
+     * @param mapfn The callback used to map the result into one or more values.
+     */
+    function sameFlatMap<T>(array: T[], mapfn: (x: T, i: number) => T | T[]): T[];
+    function mapDefined<T, U>(array: ReadonlyArray<T>, mapFn: (x: T, i: number) => U | undefined): U[];
     /**
      * Computes the first matching span of elements and returns a tuple of the first span
      * and the remaining elements.
@@ -2491,23 +3473,71 @@ declare namespace ts {
      * @param mapfn A callback used to map a contiguous chunk of values to a single value.
      */
     function spanMap<T, K, U>(array: T[], keyfn: (x: T, i: number) => K, mapfn: (chunk: T[], key: K, start: number, end: number) => U): U[];
-    function mapObject<T, U>(object: MapLike<T>, f: (key: string, x: T) => [string, U]): MapLike<U>;
+    function mapEntries<T, U>(map: Map<T>, f: (key: string, value: T) => [string, U]): Map<U>;
+    function some<T>(array: T[], predicate?: (value: T) => boolean): boolean;
     function concatenate<T>(array1: T[], array2: T[]): T[];
     function deduplicate<T>(array: T[], areEqual?: (a: T, b: T) => boolean): T[];
+    function arrayIsEqualTo<T>(array1: ReadonlyArray<T>, array2: ReadonlyArray<T>, equaler?: (a: T, b: T) => boolean): boolean;
+    function changesAffectModuleResolution(oldOptions: CompilerOptions, newOptions: CompilerOptions): boolean;
     /**
      * Compacts an array, removing any falsey elements.
      */
     function compact<T>(array: T[]): T[];
+    /**
+     * Gets the relative complement of `arrayA` with respect to `b`, returning the elements that
+     * are not present in `arrayA` but are present in `arrayB`. Assumes both arrays are sorted
+     * based on the provided comparer.
+     */
+    function relativeComplement<T>(arrayA: T[] | undefined, arrayB: T[] | undefined, comparer?: (x: T, y: T) => Comparison, offsetA?: number, offsetB?: number): T[] | undefined;
     function sum(array: any[], prop: string): number;
-    function addRange<T>(to: T[], from: T[]): void;
+    /**
+     * Appends a value to an array, returning the array.
+     *
+     * @param to The array to which `value` is to be appended. If `to` is `undefined`, a new array
+     * is created if `value` was appended.
+     * @param value The value to append to the array. If `value` is `undefined`, nothing is
+     * appended.
+     */
+    function append<T>(to: T[] | undefined, value: T | undefined): T[] | undefined;
+    /**
+     * Appends a range of value to an array, returning the array.
+     *
+     * @param to The array to which `value` is to be appended. If `to` is `undefined`, a new array
+     * is created if `value` was appended.
+     * @param from The values to append to the array. If `from` is `undefined`, nothing is
+     * appended. If an element of `from` is `undefined`, that element is not appended.
+     * @param start The offset in `from` at which to start copying values.
+     * @param end The offset in `from` at which to stop copying values (non-inclusive).
+     */
+    function addRange<T>(to: T[] | undefined, from: T[] | undefined, start?: number, end?: number): T[] | undefined;
+    /**
+     * Stable sort of an array. Elements equal to each other maintain their relative position in the array.
+     */
+    function stableSort<T>(array: T[], comparer?: (x: T, y: T) => Comparison): T[];
     function rangeEquals<T>(array1: T[], array2: T[], pos: number, end: number): boolean;
-    function firstOrUndefined<T>(array: T[]): T;
-    function singleOrUndefined<T>(array: T[]): T;
-    function singleOrMany<T>(array: T[]): T | T[];
     /**
-     * Returns the last element of an array if non-empty, undefined otherwise.
+     * Returns the element at a specific offset in an array if non-empty, `undefined` otherwise.
+     * A negative offset indicates the element should be retrieved from the end of the array.
      */
-    function lastOrUndefined<T>(array: T[]): T;
+    function elementAt<T>(array: T[] | undefined, offset: number): T | undefined;
+    /**
+     * Returns the first element of an array if non-empty, `undefined` otherwise.
+     */
+    function firstOrUndefined<T>(array: T[]): T | undefined;
+    /**
+     * Returns the last element of an array if non-empty, `undefined` otherwise.
+     */
+    function lastOrUndefined<T>(array: T[]): T | undefined;
+    /**
+     * Returns the only element of an array if it contains only one element, `undefined` otherwise.
+     */
+    function singleOrUndefined<T>(array: T[]): T | undefined;
+    /**
+     * Returns the only element of an array if it contains only one element; otheriwse, returns the
+     * array.
+     */
+    function singleOrMany<T>(array: T[]): T | T[];
+    function replaceElement<T>(array: T[], index: number, value: T): T[];
     /**
      * Performs a binary search, finding the index at which 'value' occurs in 'array'.
      * If no such index is found, returns the 2's-complement of first index at which
@@ -2515,7 +3545,7 @@ declare namespace ts {
      * @param array A sorted array whose first element must be no larger than number
      * @param number The value to be searched for in the array.
      */
-    function binarySearch<T>(array: T[], value: T, comparer?: (v1: T, v2: T) => number): number;
+    function binarySearch<T>(array: T[], value: T, comparer?: (v1: T, v2: T) => number, offset?: number): number;
     function reduceLeft<T, U>(array: T[], f: (memo: U, value: T, i: number) => U, initial: U, start?: number, count?: number): U;
     function reduceLeft<T>(array: T[], f: (memo: T, value: T, i: number) => T): T;
     function reduceRight<T, U>(array: T[], f: (memo: U, value: T, i: number) => U, initial: U, start?: number, count?: number): U;
@@ -2523,9 +3553,6 @@ declare namespace ts {
     /**
      * Indicates whether a map-like contains an own property with the specified key.
      *
-     * NOTE: This is intended for use only with MapLike<T> objects. For Map<T> objects, use
-     *       the 'in' operator.
-     *
      * @param map A map-like.
      * @param key A property key.
      */
@@ -2533,9 +3560,6 @@ declare namespace ts {
     /**
      * Gets the value of an owned property in a map-like.
      *
-     * NOTE: This is intended for use only with MapLike<T> objects. For Map<T> objects, use
-     *       an indexer.
-     *
      * @param map A map-like.
      * @param key A property key.
      */
@@ -2549,52 +3573,22 @@ declare namespace ts {
      * @param map A map-like.
      */
     function getOwnKeys<T>(map: MapLike<T>): string[];
+    /** Shims `Array.from`. */
+    function arrayFrom<T, U>(iterator: Iterator<T>, map: (t: T) => U): U[];
+    function arrayFrom<T>(iterator: Iterator<T>): T[];
+    function convertToArray<T, U>(iterator: Iterator<T>, f: (value: T) => U): U[];
     /**
-     * Enumerates the properties of a Map<T>, invoking a callback and returning the first truthy result.
-     *
-     * @param map A map for which properties should be enumerated.
-     * @param callback A callback to invoke for each property.
-     */
-    function forEachProperty<T, U>(map: Map<T>, callback: (value: T, key: string) => U): U;
-    /**
-     * Returns true if a Map<T> has some matching property.
-     *
-     * @param map A map whose properties should be tested.
-     * @param predicate An optional callback used to test each property.
-     */
-    function someProperties<T>(map: Map<T>, predicate?: (value: T, key: string) => boolean): boolean;
-    /**
-     * Performs a shallow copy of the properties from a source Map<T> to a target MapLike<T>
-     *
-     * @param source A map from which properties should be copied.
-     * @param target A map to which properties should be copied.
+     * Calls `callback` for each entry in the map, returning the first truthy result.
+     * Use `map.forEach` instead for normal iteration.
      */
-    function copyProperties<T>(source: Map<T>, target: MapLike<T>): void;
+    function forEachEntry<T, U>(map: Map<T>, callback: (value: T, key: string) => U | undefined): U | undefined;
+    /** `forEachEntry` for just keys. */
+    function forEachKey<T>(map: Map<{}>, callback: (key: string) => T | undefined): T | undefined;
+    /** Copy entries from `source` to `target`. */
+    function copyEntries<T>(source: Map<T>, target: Map<T>): void;
     function assign<T1 extends MapLike<{}>, T2, T3>(t: T1, arg1: T2, arg2: T3): T1 & T2 & T3;
     function assign<T1 extends MapLike<{}>, T2>(t: T1, arg1: T2): T1 & T2;
     function assign<T1 extends MapLike<{}>>(t: T1, ...args: any[]): any;
-    /**
-     * Reduce the properties of a map.
-     *
-     * NOTE: This is intended for use with Map<T> objects. For MapLike<T> objects, use
-     *       reduceOwnProperties instead as it offers better runtime safety.
-     *
-     * @param map The map to reduce
-     * @param callback An aggregation function that is called for each entry in the map
-     * @param initial The initial value for the reduction.
-     */
-    function reduceProperties<T, U>(map: Map<T>, callback: (aggregate: U, value: T, key: string) => U, initial: U): U;
-    /**
-     * Reduce the properties defined on a map-like (but not from its prototype chain).
-     *
-     * NOTE: This is intended for use with MapLike<T> objects. For Map<T> objects, use
-     *       reduceProperties instead as it offers better performance.
-     *
-     * @param map The map-like to reduce
-     * @param callback An aggregation function that is called for each entry in the map
-     * @param initial The initial value for the reduction.
-     */
-    function reduceOwnProperties<T, U>(map: MapLike<T>, callback: (aggregate: U, value: T, key: string) => U, initial: U): U;
     /**
      * Performs a shallow equality comparison of the contents of two map-likes.
      *
@@ -2614,25 +3608,33 @@ declare namespace ts {
      */
     function arrayToMap<T>(array: T[], makeKey: (value: T) => string): Map<T>;
     function arrayToMap<T, U>(array: T[], makeKey: (value: T) => string, makeValue: (value: T) => U): Map<U>;
-    function isEmpty<T>(map: Map<T>): boolean;
     function cloneMap<T>(map: Map<T>): Map<T>;
     function clone<T>(object: T): T;
     function extend<T1, T2>(first: T1, second: T2): T1 & T2;
-    /**
-     * Adds the value to an array of values associated with the key, and returns the array.
-     * Creates the array if it does not already exist.
-     */
-    function multiMapAdd<V>(map: Map<V[]>, key: string, value: V): V[];
-    /**
-     * Removes a value from an array of values associated with the key.
-     * Does not preserve the order of those values.
-     * Does nothing if `key` is not in `map`, or `value` is not in `map[key]`.
-     */
-    function multiMapRemove<V>(map: Map<V[]>, key: string, value: V): void;
+    interface MultiMap<T> extends Map<T[]> {
+        /**
+         * Adds the value to an array of values associated with the key, and returns the array.
+         * Creates the array if it does not already exist.
+         */
+        add(key: string, value: T): T[];
+        /**
+         * Removes a value from an array of values associated with the key.
+         * Does not preserve the order of those values.
+         * Does nothing if `key` is not in `map`, or `value` is not in `map[key]`.
+         */
+        remove(key: string, value: T): void;
+    }
+    function createMultiMap<T>(): MultiMap<T>;
     /**
      * Tests whether a value is an array.
      */
     function isArray(value: any): value is any[];
+    function tryCast<TOut extends TIn, TIn = any>(value: TIn | undefined, test: (value: TIn) => value is TOut): TOut | undefined;
+    function cast<TOut extends TIn, TIn = any>(value: TIn | undefined, test: (value: TIn) => value is TOut): TOut;
+    /** Does nothing. */
+    function noop(): void;
+    /** Throws an error because a function is not implemented. */
+    function notImplemented(): never;
     function memoize<T>(callback: () => T): () => T;
     /**
      * High-order function, creates a function that executes a function composition.
@@ -2648,11 +3650,15 @@ declare namespace ts {
      * @param args The functions to compose.
      */
     function compose<T>(...args: ((t: T) => T)[]): (t: T) => T;
-    let localizedDiagnosticMessages: Map<string>;
+    function formatStringFromArgs(text: string, args: {
+        [index: number]: string;
+    }, baseIndex?: number): string;
+    let localizedDiagnosticMessages: MapLike<string>;
     function getLocaleSpecificMessage(message: DiagnosticMessage): string;
-    function createFileDiagnostic(file: SourceFile, start: number, length: number, message: DiagnosticMessage, ...args: any[]): Diagnostic;
-    function formatMessage(dummy: any, message: DiagnosticMessage): string;
-    function createCompilerDiagnostic(message: DiagnosticMessage, ...args: any[]): Diagnostic;
+    function createFileDiagnostic(file: SourceFile, start: number, length: number, message: DiagnosticMessage, ...args: (string | number)[]): Diagnostic;
+    function formatMessage(_dummy: any, message: DiagnosticMessage): string;
+    function createCompilerDiagnostic(message: DiagnosticMessage, ...args: (string | number)[]): Diagnostic;
+    function createCompilerDiagnosticFromMessageChain(chain: DiagnosticMessageChain): Diagnostic;
     function chainDiagnosticMessages(details: DiagnosticMessageChain, message: DiagnosticMessage, ...args: any[]): DiagnosticMessageChain;
     function concatenateDiagnosticMessageChains(headChain: DiagnosticMessageChain, tailChain: DiagnosticMessageChain): DiagnosticMessageChain;
     function compareValues<T>(a: T, b: T): Comparison;
@@ -2662,17 +3668,31 @@ declare namespace ts {
     function sortAndDeduplicateDiagnostics(diagnostics: Diagnostic[]): Diagnostic[];
     function deduplicateSortedDiagnostics(diagnostics: Diagnostic[]): Diagnostic[];
     function normalizeSlashes(path: string): string;
+    /**
+     * Returns length of path root (i.e. length of "/", "x:/", "//server/share/, file:///user/files")
+     */
     function getRootLength(path: string): number;
+    /**
+     * Internally, we represent paths as strings with '/' as the directory separator.
+     * When we make system calls (eg: LanguageServiceHost.getDirectory()),
+     * we expect the host to correctly handle paths in our specified format.
+     */
     const directorySeparator = "/";
     function normalizePath(path: string): string;
     /** A path ending with '/' refers to a directory only, never a file. */
     function pathEndsWithDirectorySeparator(path: string): boolean;
+    /**
+     * Returns the path except for its basename. Eg:
+     *
+     * /path/to/file.ext -> /path/to
+     */
     function getDirectoryPath(path: Path): Path;
     function getDirectoryPath(path: string): string;
     function isUrl(path: string): boolean;
     function isExternalModuleNameRelative(moduleName: string): boolean;
     function getEmitScriptTarget(compilerOptions: CompilerOptions): ScriptTarget;
     function getEmitModuleKind(compilerOptions: CompilerOptions): ModuleKind;
+    function getEmitModuleResolutionKind(compilerOptions: CompilerOptions): ModuleResolutionKind;
     function hasZeroOrOneAsteriskCharacter(str: string): boolean;
     function isRootedDiskPath(path: string): boolean;
     function convertToRelativePath(absoluteOrRelativePath: string, basePath: string, getCanonicalFileName: (path: string) => string): string;
@@ -2695,35 +3715,45 @@ declare namespace ts {
     function comparePaths(a: string, b: string, currentDirectory: string, ignoreCase?: boolean): Comparison;
     function containsPath(parent: string, child: string, currentDirectory: string, ignoreCase?: boolean): boolean;
     function startsWith(str: string, prefix: string): boolean;
+    function removePrefix(str: string, prefix: string): string;
     function endsWith(str: string, suffix: string): boolean;
+    function hasExtension(fileName: string): boolean;
     function fileExtensionIs(path: string, extension: string): boolean;
-    function fileExtensionIsAny(path: string, extensions: string[]): boolean;
-    function getRegularExpressionForWildcard(specs: string[], basePath: string, usage: "files" | "directories" | "exclude"): string;
+    function fileExtensionIsOneOf(path: string, extensions: string[]): boolean;
+    function getRegularExpressionForWildcard(specs: string[], basePath: string, usage: "files" | "directories" | "exclude"): string | undefined;
+    /**
+     * An "includes" path "foo" is implicitly a glob "foo/** /*" (without the space) if its last component has no extension,
+     * and does not contain any glob characters itself.
+     */
+    function isImplicitGlob(lastPathComponent: string): boolean;
     interface FileSystemEntries {
         files: string[];
         directories: string[];
     }
     interface FileMatcherPatterns {
+        /** One pattern for each "include" spec. */
+        includeFilePatterns: string[];
+        /** One pattern matching one of any of the "include" specs. */
         includeFilePattern: string;
         includeDirectoryPattern: string;
         excludePattern: string;
         basePaths: string[];
     }
-    function getFileMatcherPatterns(path: string, extensions: string[], excludes: string[], includes: string[], useCaseSensitiveFileNames: boolean, currentDirectory: string): FileMatcherPatterns;
+    function getFileMatcherPatterns(path: string, excludes: string[], includes: string[], useCaseSensitiveFileNames: boolean, currentDirectory: string): FileMatcherPatterns;
     function matchFiles(path: string, extensions: string[], excludes: string[], includes: string[], useCaseSensitiveFileNames: boolean, currentDirectory: string, getFileSystemEntries: (path: string) => FileSystemEntries): string[];
     function ensureScriptKind(fileName: string, scriptKind?: ScriptKind): ScriptKind;
     function getScriptKindFromFileName(fileName: string): ScriptKind;
     /**
      *  List of supported extensions in order of file resolution precedence.
      */
-    const supportedTypeScriptExtensions: string[];
+    const supportedTypeScriptExtensions: Extension[];
     /** Must have ".d.ts" first because if ".ts" goes first, that will be detected as the extension instead of ".d.ts". */
-    const supportedTypescriptExtensionsForExtractExtension: string[];
-    const supportedJavascriptExtensions: string[];
-    function getSupportedExtensions(options?: CompilerOptions): string[];
+    const supportedTypescriptExtensionsForExtractExtension: Extension[];
+    const supportedJavascriptExtensions: Extension[];
+    function getSupportedExtensions(options?: CompilerOptions, extraFileExtensions?: JsFileExtensionInfo[]): string[];
     function hasJavaScriptFileExtension(fileName: string): boolean;
     function hasTypeScriptFileExtension(fileName: string): boolean;
-    function isSupportedSourceFileName(fileName: string, compilerOptions?: CompilerOptions): boolean;
+    function isSupportedSourceFileName(fileName: string, compilerOptions?: CompilerOptions, extraFileExtensions?: JsFileExtensionInfo[]): boolean;
     /**
      * Extension boundaries by priority. Lower numbers indicate higher priorities, and are
      * aligned to the offset of the highest priority extension in the
@@ -2732,7 +3762,6 @@ declare namespace ts {
     const enum ExtensionPriority {
         TypeScriptFiles = 0,
         DeclarationAndJavaScriptFiles = 2,
-        Limit = 5,
         Highest = 0,
         Lowest = 2,
     }
@@ -2740,24 +3769,24 @@ declare namespace ts {
     /**
      * Adjusts an extension priority to be the highest priority within the same range.
      */
-    function adjustExtensionPriority(extensionPriority: ExtensionPriority): ExtensionPriority;
+    function adjustExtensionPriority(extensionPriority: ExtensionPriority, supportedExtensions: string[]): ExtensionPriority;
     /**
      * Gets the next lowest extension priority for a given priority.
      */
-    function getNextLowestExtensionPriority(extensionPriority: ExtensionPriority): ExtensionPriority;
+    function getNextLowestExtensionPriority(extensionPriority: ExtensionPriority, supportedExtensions: string[]): ExtensionPriority;
     function removeFileExtension(path: string): string;
     function tryRemoveExtension(path: string, extension: string): string | undefined;
     function removeExtension(path: string, extension: string): string;
-    function isJsxOrTsxExtension(ext: string): boolean;
     function changeExtension<T extends string | Path>(path: T, newExtension: string): T;
     interface ObjectAllocator {
         getNodeConstructor(): new (kind: SyntaxKind, pos?: number, end?: number) => Node;
-        getTokenConstructor(): new (kind: SyntaxKind, pos?: number, end?: number) => Token;
-        getIdentifierConstructor(): new (kind: SyntaxKind, pos?: number, end?: number) => Token;
-        getSourceFileConstructor(): new (kind: SyntaxKind, pos?: number, end?: number) => SourceFile;
+        getTokenConstructor(): new <TKind extends SyntaxKind>(kind: TKind, pos?: number, end?: number) => Token<TKind>;
+        getIdentifierConstructor(): new (kind: SyntaxKind.Identifier, pos?: number, end?: number) => Identifier;
+        getSourceFileConstructor(): new (kind: SyntaxKind.SourceFile, pos?: number, end?: number) => SourceFile;
         getSymbolConstructor(): new (flags: SymbolFlags, name: string) => Symbol;
         getTypeConstructor(): new (checker: TypeChecker, flags: TypeFlags) => Type;
         getSignatureConstructor(): new (checker: TypeChecker) => Signature;
+        getSourceMapSourceConstructor(): new (fileName: string, text: string, skipTrivia?: (pos: number) => number) => SourceMapSource;
     }
     let objectAllocator: ObjectAllocator;
     const enum AssertionLevel {
@@ -2767,12 +3796,16 @@ declare namespace ts {
         VeryAggressive = 3,
     }
     namespace Debug {
+        let currentAssertionLevel: AssertionLevel;
+        let isDebugging: boolean;
         function shouldAssert(level: AssertionLevel): boolean;
-        function assert(expression: boolean, message?: string, verboseDebugInfo?: () => string): void;
-        function fail(message?: string): void;
+        function assert(expression: boolean, message?: string, verboseDebugInfo?: () => string, stackCrawlMark?: Function): void;
+        function fail(message?: string, stackCrawlMark?: Function): void;
+        function getFunctionName(func: Function): any;
     }
-    function getEnvironmentVariable(name: string, host?: CompilerHost): string;
     /** Remove an item from an array, moving everything to its right one space left. */
+    function orderedRemoveItem<T>(array: T[], item: T): boolean;
+    /** Remove an item by index from an array, moving everything to its right one space left. */
     function orderedRemoveItemAt<T>(array: T[], index: number): void;
     function unorderedRemoveItemAt<T>(array: T[], index: number): void;
     /** Remove the *first* occurrence of `item` from the array. */
@@ -2794,7 +3827,18 @@ declare namespace ts {
     function findBestPatternMatch<T>(values: T[], getPattern: (value: T) => Pattern, candidate: string): T | undefined;
     function tryParsePattern(pattern: string): Pattern | undefined;
     function positionIsSynthesized(pos: number): boolean;
+    /** True if an extension is one of the supported TypeScript extensions. */
+    function extensionIsTypeScript(ext: Extension): boolean;
+    /**
+     * Gets the extension from a path.
+     * Path must have a valid extension.
+     */
+    function extensionFromPath(path: string): Extension;
+    function tryGetExtensionFromPath(path: string): Extension | undefined;
+    function isCheckJsEnabledForFile(sourceFile: SourceFile, compilerOptions: CompilerOptions): boolean;
 }
+declare function setTimeout(handler: (...args: any[]) => void, timeout: number): any;
+declare function clearTimeout(handle: any): void;
 declare namespace ts {
     type FileWatcherCallback = (fileName: string, removed?: boolean) => void;
     type DirectoryWatcherCallback = (fileName: string) => void;
@@ -2811,7 +3855,11 @@ declare namespace ts {
         readFile(path: string, encoding?: string): string;
         getFileSize?(path: string): number;
         writeFile(path: string, data: string, writeByteOrderMark?: boolean): void;
-        watchFile?(path: string, callback: FileWatcherCallback): FileWatcher;
+        /**
+         * @pollingInterval - this parameter is used in polling-based watchers and ignored in watchers that
+         * use native OS file watching
+         */
+        watchFile?(path: string, callback: FileWatcherCallback, pollingInterval?: number): FileWatcher;
         watchDirectory?(path: string, callback: DirectoryWatcherCallback, recursive?: boolean): FileWatcher;
         resolvePath(path: string): string;
         fileExists(path: string): boolean;
@@ -2822,12 +3870,19 @@ declare namespace ts {
         getDirectories(path: string): string[];
         readDirectory(path: string, extensions?: string[], exclude?: string[], include?: string[]): string[];
         getModifiedTime?(path: string): Date;
+        /**
+         * This should be cryptographically secure.
+         * A good implementation is node.js' `crypto.createHash`. (https://nodejs.org/api/crypto.html#crypto_crypto_createhash_algorithm)
+         */
         createHash?(data: string): string;
         getMemoryUsage?(): number;
         exit(exitCode?: number): void;
         realpath?(path: string): string;
         getEnvironmentVariable(name: string): string;
         tryEnableSourceMapsForHost?(): void;
+        debugMode?: boolean;
+        setTimeout?(callback: (...args: any[]) => void, ms: number, ...args: any[]): any;
+        clearTimeout?(timeoutId: any): void;
     }
     interface FileWatcher {
         close(): void;
@@ -2836,7 +3891,8 @@ declare namespace ts {
         directoryName: string;
         referenceCount: number;
     }
-    var sys: System;
+    function getNodeMajorVersion(): number;
+    let sys: System;
 }
 declare namespace ts {
     const externalHelpersModuleNameText = "tslib";
@@ -2846,113 +3902,117 @@ declare namespace ts {
         isNoDefaultLib?: boolean;
         isTypeReferenceDirective?: boolean;
     }
-    function getDeclarationOfKind(symbol: Symbol, kind: SyntaxKind): Declaration;
+    function getDeclarationOfKind<T extends Declaration>(symbol: Symbol, kind: T["kind"]): T;
+    function findDeclaration<T extends Declaration>(symbol: Symbol, predicate: (node: Declaration) => node is T): T | undefined;
+    function findDeclaration(symbol: Symbol, predicate: (node: Declaration) => boolean): Declaration | undefined;
     interface StringSymbolWriter extends SymbolWriter {
         string(): string;
     }
-    interface EmitHost extends ScriptReferenceHost {
-        getSourceFiles(): SourceFile[];
-        isSourceFileFromExternalLibrary(file: SourceFile): boolean;
-        getCommonSourceDirectory(): string;
-        getCanonicalFileName(fileName: string): string;
-        getNewLine(): string;
-        isEmitBlocked(emitFileName: string): boolean;
-        writeFile: WriteFileCallback;
-    }
     function getSingleLineStringWriter(): StringSymbolWriter;
     function releaseStringWriter(writer: StringSymbolWriter): void;
     function getFullWidth(node: Node): number;
-    function arrayIsEqualTo<T>(array1: ReadonlyArray<T>, array2: ReadonlyArray<T>, equaler?: (a: T, b: T) => boolean): boolean;
     function hasResolvedModule(sourceFile: SourceFile, moduleNameText: string): boolean;
-    function getResolvedModule(sourceFile: SourceFile, moduleNameText: string): ResolvedModule;
-    function setResolvedModule(sourceFile: SourceFile, moduleNameText: string, resolvedModule: ResolvedModule): void;
+    function getResolvedModule(sourceFile: SourceFile, moduleNameText: string): ResolvedModuleFull;
+    function setResolvedModule(sourceFile: SourceFile, moduleNameText: string, resolvedModule: ResolvedModuleFull): void;
     function setResolvedTypeReferenceDirective(sourceFile: SourceFile, typeReferenceDirectiveName: string, resolvedTypeReferenceDirective: ResolvedTypeReferenceDirective): void;
-    function moduleResolutionIsEqualTo(oldResolution: ResolvedModule, newResolution: ResolvedModule): boolean;
+    function moduleResolutionIsEqualTo(oldResolution: ResolvedModuleFull, newResolution: ResolvedModuleFull): boolean;
     function typeDirectiveIsEqualTo(oldResolution: ResolvedTypeReferenceDirective, newResolution: ResolvedTypeReferenceDirective): boolean;
     function hasChangesInResolutions<T>(names: string[], newResolutions: T[], oldResolutions: Map<T>, comparer: (oldResolution: T, newResolution: T) => boolean): boolean;
     function containsParseError(node: Node): boolean;
     function getSourceFileOfNode(node: Node): SourceFile;
     function isStatementWithLocals(node: Node): boolean;
-    function getStartPositionOfLine(line: number, sourceFile: SourceFile): number;
+    function getStartPositionOfLine(line: number, sourceFile: SourceFileLike): number;
     function nodePosToString(node: Node): string;
     function getStartPosOfNode(node: Node): number;
     function isDefined(value: any): boolean;
-    function getEndLinePosition(line: number, sourceFile: SourceFile): number;
+    function getEndLinePosition(line: number, sourceFile: SourceFileLike): number;
     function nodeIsMissing(node: Node): boolean;
     function nodeIsPresent(node: Node): boolean;
-    function getTokenPosOfNode(node: Node, sourceFile?: SourceFile, includeJsDocComment?: boolean): number;
-    function isJSDocNode(node: Node): boolean;
-    function isJSDocTag(node: Node): boolean;
-    function getNonDecoratorTokenPosOfNode(node: Node, sourceFile?: SourceFile): number;
+    function getTokenPosOfNode(node: Node, sourceFile?: SourceFileLike, includeJsDoc?: boolean): number;
+    function getNonDecoratorTokenPosOfNode(node: Node, sourceFile?: SourceFileLike): number;
     function getSourceTextOfNodeFromSourceFile(sourceFile: SourceFile, node: Node, includeTrivia?: boolean): string;
     function getTextOfNodeFromSourceText(sourceText: string, node: Node): string;
     function getTextOfNode(node: Node, includeTrivia?: boolean): string;
-    function getLiteralText(node: LiteralLikeNode, sourceFile: SourceFile, languageVersion: ScriptTarget): string;
-    function isBinaryOrOctalIntegerLiteral(node: LiteralLikeNode, text: string): boolean;
+    /**
+     * Gets flags that control emit behavior of a node.
+     */
+    function getEmitFlags(node: Node): EmitFlags | undefined;
+    function getLiteralText(node: LiteralLikeNode, sourceFile: SourceFile): string;
+    function getTextOfConstantValue(value: string | number): string;
     function escapeIdentifier(identifier: string): string;
-    function unescapeIdentifier(identifier: string): string;
     function makeIdentifierFromModuleName(moduleName: string): string;
     function isBlockOrCatchScoped(declaration: Declaration): boolean;
+    function isCatchClauseVariableDeclarationOrBindingElement(declaration: Declaration): boolean;
     function isAmbientModule(node: Node): boolean;
+    /** Given a symbol for a module, checks that it is a shorthand ambient module. */
     function isShorthandAmbientModuleSymbol(moduleSymbol: Symbol): boolean;
     function isBlockScopedContainerTopLevel(node: Node): boolean;
     function isGlobalScopeAugmentation(module: ModuleDeclaration): boolean;
     function isExternalModuleAugmentation(node: Node): boolean;
+    function isEffectiveExternalModule(node: SourceFile, compilerOptions: CompilerOptions): boolean;
     function isBlockScope(node: Node, parentNode: Node): boolean;
     function getEnclosingBlockScopeContainer(node: Node): Node;
-    function isCatchClauseVariableDeclaration(declaration: Declaration): boolean;
     function declarationNameToString(name: DeclarationName): string;
-    function createDiagnosticForNode(node: Node, message: DiagnosticMessage, arg0?: any, arg1?: any, arg2?: any): Diagnostic;
+    function getNameFromIndexInfo(info: IndexInfo): string | undefined;
+    function getTextOfPropertyName(name: PropertyName): string;
+    function entityNameToString(name: EntityNameOrEntityNameExpression): string;
+    function createDiagnosticForNode(node: Node, message: DiagnosticMessage, arg0?: string | number, arg1?: string | number, arg2?: string | number): Diagnostic;
+    function createDiagnosticForNodeInSourceFile(sourceFile: SourceFile, node: Node, message: DiagnosticMessage, arg0?: string | number, arg1?: string | number, arg2?: string | number): Diagnostic;
     function createDiagnosticForNodeFromMessageChain(node: Node, messageChain: DiagnosticMessageChain): Diagnostic;
     function getSpanOfTokenAtPosition(sourceFile: SourceFile, pos: number): TextSpan;
     function getErrorSpanForNode(sourceFile: SourceFile, node: Node): TextSpan;
     function isExternalOrCommonJsModule(file: SourceFile): boolean;
-    function isDeclarationFile(file: SourceFile): boolean;
     function isConstEnumDeclaration(node: Node): boolean;
     function isConst(node: Node): boolean;
     function isLet(node: Node): boolean;
-    function isSuperCallExpression(n: Node): boolean;
-    function isPrologueDirective(node: Node): boolean;
+    function isSuperCall(n: Node): n is SuperCall;
+    function isImportCall(n: Node): n is ImportCall;
+    function isPrologueDirective(node: Node): node is PrologueDirective;
     function getLeadingCommentRangesOfNode(node: Node, sourceFileOfNode: SourceFile): CommentRange[];
     function getLeadingCommentRangesOfNodeFromText(node: Node, text: string): CommentRange[];
-    function getJsDocComments(node: Node, sourceFileOfNode: SourceFile): CommentRange[];
-    function getJsDocCommentsFromText(node: Node, text: string): CommentRange[];
+    function getJSDocCommentRanges(node: Node, text: string): CommentRange[];
     let fullTripleSlashReferencePathRegEx: RegExp;
     let fullTripleSlashReferenceTypeReferenceDirectiveRegEx: RegExp;
     let fullTripleSlashAMDReferencePathRegEx: RegExp;
     function isPartOfTypeNode(node: Node): boolean;
+    function isChildOfNodeWithKind(node: Node, kind: SyntaxKind): boolean;
     function forEachReturnStatement<T>(body: Block, visitor: (stmt: ReturnStatement) => T): T;
     function forEachYieldExpression(body: Block, visitor: (expr: YieldExpression) => void): void;
+    /**
+     * Gets the most likely element type for a TypeNode. This is not an exhaustive test
+     * as it assumes a rest argument can only be an array type (either T[], or Array<T>).
+     *
+     * @param node The type node.
+     */
+    function getRestParameterElementType(node: TypeNode): TypeNode;
     function isVariableLike(node: Node): node is VariableLikeDeclaration;
-    function isAccessor(node: Node): node is AccessorDeclaration;
-    function isClassLike(node: Node): node is ClassLikeDeclaration;
-    function isFunctionLike(node: Node): node is FunctionLikeDeclaration;
-    function isFunctionLikeKind(kind: SyntaxKind): boolean;
     function introducesArgumentsExoticObject(node: Node): boolean;
-    function isIterationStatement(node: Node, lookInLabeledStatements: boolean): node is IterationStatement;
+    function unwrapInnermostStatementOfLabel(node: LabeledStatement, beforeUnwrapLabelCallback?: (node: LabeledStatement) => void): Statement;
     function isFunctionBlock(node: Node): boolean;
     function isObjectLiteralMethod(node: Node): node is MethodDeclaration;
+    function isObjectLiteralOrClassExpressionMethod(node: Node): node is MethodDeclaration;
     function isIdentifierTypePredicate(predicate: TypePredicate): predicate is IdentifierTypePredicate;
     function isThisTypePredicate(predicate: TypePredicate): predicate is ThisTypePredicate;
+    function getPropertyAssignment(objectLiteral: ObjectLiteralExpression, key: string, key2?: string): PropertyAssignment[];
     function getContainingFunction(node: Node): FunctionLikeDeclaration;
     function getContainingClass(node: Node): ClassLikeDeclaration;
     function getThisContainer(node: Node, includeArrowFunctions: boolean): Node;
-    /**
-      * Given an super call/property node, returns the closest node where
-      * - a super call/property access is legal in the node and not legal in the parent node the node.
-      *   i.e. super call is legal in constructor but not legal in the class body.
-      * - the container is an arrow function (so caller might need to call getSuperContainer again in case it needs to climb higher)
-      * - a super call/property is definitely illegal in the container (but might be legal in some subnode)
-      *   i.e. super property access is illegal in function declaration but can be legal in the statement list
-      */
+    function getNewTargetContainer(node: Node): Node;
+    /**
+     * Given an super call/property node, returns the closest node where
+     * - a super call/property access is legal in the node and not legal in the parent node the node.
+     *   i.e. super call is legal in constructor but not legal in the class body.
+     * - the container is an arrow function (so caller might need to call getSuperContainer again in case it needs to climb higher)
+     * - a super call/property is definitely illegal in the container (but might be legal in some subnode)
+     *   i.e. super property access is illegal in function declaration but can be legal in the statement list
+     */
     function getSuperContainer(node: Node, stopOnFunctions: boolean): Node;
     function getImmediatelyInvokedFunctionExpression(func: Node): CallExpression;
     /**
      * Determines whether a node is a property or element access expression for super.
      */
-    function isSuperProperty(node: Node): node is (PropertyAccessExpression | ElementAccessExpression);
+    function isSuperProperty(node: Node): node is SuperProperty;
     function getEntityNameFromTypeNode(node: TypeNode): EntityNameOrEntityNameExpression;
-    function isCallLikeExpression(node: Node): node is CallLikeExpression;
     function getInvokedExpression(node: CallLikeExpression): Expression;
     function nodeCanBeDecorated(node: Node): boolean;
     function nodeIsDecorated(node: Node): boolean;
@@ -2960,7 +4020,6 @@ declare namespace ts {
     function childIsDecorated(node: Node): boolean;
     function isJSXTagName(node: Node): boolean;
     function isPartOfExpression(node: Node): boolean;
-    function isInstantiatedModule(node: ModuleDeclaration, preserveConstEnums: boolean): boolean;
     function isExternalModuleImportEqualsDeclaration(node: Node): boolean;
     function getExternalModuleImportEqualsDeclarationExpression(node: Node): Expression;
     function isInternalModuleImportEqualsDeclaration(node: Node): node is ImportEqualsDeclaration;
@@ -2968,35 +4027,56 @@ declare namespace ts {
     function isInJavaScriptFile(node: Node): boolean;
     /**
      * Returns true if the node is a CallExpression to the identifier 'require' with
-     * exactly one argument.
+     * exactly one argument (of the form 'require("name")').
      * This function does not test if the node is in a JavaScript file or not.
-    */
-    function isRequireCall(expression: Node, checkArgumentIsStringLiteral: boolean): expression is CallExpression;
+     */
+    function isRequireCall(callExpression: Node, checkArgumentIsStringLiteral: boolean): callExpression is CallExpression;
     function isSingleOrDoubleQuote(charCode: number): boolean;
     /**
      * Returns true if the node is a variable declaration whose initializer is a function expression.
      * This function does not test if the node is in a JavaScript file or not.
      */
-    function isDeclarationOfFunctionExpression(s: Symbol): boolean;
-    function getSpecialPropertyAssignmentKind(expression: Node): SpecialPropertyAssignmentKind;
+    function isDeclarationOfFunctionOrClassExpression(s: Symbol): boolean;
+    function getRightMostAssignedExpression(node: Node): Node;
+    function isExportsIdentifier(node: Node): boolean;
+    function isModuleExportsPropertyAccessExpression(node: Node): boolean;
+    function getSpecialPropertyAssignmentKind(expression: ts.BinaryExpression): SpecialPropertyAssignmentKind;
     function getExternalModuleName(node: Node): Expression;
-    function getNamespaceDeclarationNode(node: ImportDeclaration | ImportEqualsDeclaration | ExportDeclaration): NamespaceImport;
+    function getNamespaceDeclarationNode(node: ImportDeclaration | ImportEqualsDeclaration | ExportDeclaration): ImportEqualsDeclaration | NamespaceImport;
     function isDefaultImport(node: ImportDeclaration | ImportEqualsDeclaration | ExportDeclaration): boolean;
     function hasQuestionToken(node: Node): boolean;
     function isJSDocConstructSignature(node: Node): boolean;
-    function getJSDocComments(node: Node, checkParentVariableStatement: boolean): string[];
-    function getJSDocTypeTag(node: Node): JSDocTypeTag;
+    function getCommentsFromJSDoc(node: Node): string[];
+    function hasJSDocParameterTags(node: FunctionLikeDeclaration | SignatureDeclaration): boolean;
+    function getJSDocs(node: Node): (JSDoc | JSDocTag)[];
+    function getJSDocParameterTags(param: ParameterDeclaration): JSDocParameterTag[];
+    /** Does the opposite of `getJSDocParameterTags`: given a JSDoc parameter, finds the parameter corresponding to it. */
+    function getParameterFromJSDoc(node: JSDocParameterTag): ParameterDeclaration | undefined;
+    function getTypeParameterFromJsDoc(node: TypeParameterDeclaration & {
+        parent: JSDocTemplateTag;
+    }): TypeParameterDeclaration | undefined;
+    function getJSDocType(node: Node): JSDocType;
+    function getJSDocAugmentsTag(node: Node): JSDocAugmentsTag;
+    function getJSDocClassTag(node: Node): JSDocClassTag;
     function getJSDocReturnTag(node: Node): JSDocReturnTag;
+    function getJSDocReturnType(node: Node): JSDocType;
     function getJSDocTemplateTag(node: Node): JSDocTemplateTag;
-    function getCorrespondingJSDocParameterTag(parameter: ParameterDeclaration): JSDocParameterTag;
     function hasRestParameter(s: SignatureDeclaration): boolean;
     function hasDeclaredRestParameter(s: SignatureDeclaration): boolean;
     function isRestParameter(node: ParameterDeclaration): boolean;
     function isDeclaredRestParam(node: ParameterDeclaration): boolean;
+    const enum AssignmentKind {
+        None = 0,
+        Definite = 1,
+        Compound = 2,
+    }
+    function getAssignmentTargetKind(node: Node): AssignmentKind;
     function isAssignmentTarget(node: Node): boolean;
+    function isDeleteTarget(node: Node): boolean;
     function isNodeDescendantOf(node: Node, ancestor: Node): boolean;
     function isInAmbientContext(node: Node): boolean;
     function isDeclarationName(name: Node): boolean;
+    function isAnyDeclarationName(name: Node): boolean;
     function isLiteralComputedPropertyDeclarationName(node: Node): boolean;
     function isIdentifierName(node: Identifier): boolean;
     function isAliasSymbolDeclaration(node: Node): boolean;
@@ -3006,12 +4086,20 @@ declare namespace ts {
     function getInterfaceBaseTypeNodes(node: InterfaceDeclaration): NodeArray<ExpressionWithTypeArguments>;
     function getHeritageClause(clauses: NodeArray<HeritageClause>, kind: SyntaxKind): HeritageClause;
     function tryResolveScriptReference(host: ScriptReferenceHost, sourceFile: SourceFile, reference: FileReference): SourceFile;
-    function getAncestor(node: Node, kind: SyntaxKind): Node;
+    function getAncestor(node: Node | undefined, kind: SyntaxKind): Node | undefined;
     function getFileReferenceFromReferencePath(comment: string, commentRange: CommentRange): ReferencePathMatchResult;
     function isKeyword(token: SyntaxKind): boolean;
     function isTrivia(token: SyntaxKind): boolean;
-    function isAsyncFunctionLike(node: Node): boolean;
-    function isStringOrNumericLiteral(kind: SyntaxKind): boolean;
+    const enum FunctionFlags {
+        Normal = 0,
+        Generator = 1,
+        Async = 2,
+        Invalid = 4,
+        AsyncGenerator = 3,
+    }
+    function getFunctionFlags(node: FunctionLikeDeclaration | undefined): FunctionFlags;
+    function isAsyncFunction(node: Node): boolean;
+    function isStringOrNumericLiteral(node: Node): node is StringLiteral | NumericLiteral;
     /**
      * A declaration has a dynamic name if both of the following are true:
      *   1. The declaration has a computed property name
@@ -3027,50 +4115,28 @@ declare namespace ts {
      * where Symbol is literally the word "Symbol", and name is any identifierName
      */
     function isWellKnownSymbolSyntactically(node: Expression): boolean;
-    function getPropertyNameForPropertyNameNode(name: DeclarationName): string;
+    function getPropertyNameForPropertyNameNode(name: DeclarationName | ParameterDeclaration): string;
     function getPropertyNameForKnownSymbolName(symbolName: string): string;
     /**
      * Includes the word "Symbol" with unicode escapes
      */
     function isESSymbolIdentifier(node: Node): boolean;
-    function isModifierKind(token: SyntaxKind): boolean;
+    function isPushOrUnshiftIdentifier(node: Identifier): boolean;
     function isParameterDeclaration(node: VariableLikeDeclaration): boolean;
     function getRootDeclaration(node: Node): Node;
     function nodeStartsNewLexicalEnvironment(node: Node): boolean;
     function nodeIsSynthesized(node: TextRange): boolean;
-    function getOriginalNode(node: Node): Node;
-    /**
-     * Gets a value indicating whether a node originated in the parse tree.
-     *
-     * @param node The node to test.
-     */
-    function isParseTreeNode(node: Node): boolean;
-    /**
-     * Gets the original parse tree node for a node.
-     *
-     * @param node The original node.
-     * @returns The original parse tree node if found; otherwise, undefined.
-     */
-    function getParseTreeNode(node: Node): Node;
-    /**
-     * Gets the original parse tree node for a node.
-     *
-     * @param node The original node.
-     * @param nodeTest A callback used to ensure the correct type of parse tree node is returned.
-     * @returns The original parse tree node if found; otherwise, undefined.
-     */
-    function getParseTreeNode<T extends Node>(node: Node, nodeTest?: (node: Node) => node is T): T;
+    function getOriginalSourceFile(sourceFile: SourceFile): SourceFile;
     function getOriginalSourceFiles(sourceFiles: SourceFile[]): SourceFile[];
-    function getOriginalNodeId(node: Node): number;
     const enum Associativity {
         Left = 0,
         Right = 1,
     }
     function getExpressionAssociativity(expression: Expression): Associativity;
     function getOperatorAssociativity(kind: SyntaxKind, operator: SyntaxKind, hasArguments?: boolean): Associativity;
-    function getExpressionPrecedence(expression: Expression): 0 | 1 | -1 | 2 | 4 | 3 | 19 | 18 | 17 | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5;
-    function getOperator(expression: Expression): SyntaxKind;
-    function getOperatorPrecedence(nodeKind: SyntaxKind, operatorKind: SyntaxKind, hasArguments?: boolean): 0 | 1 | -1 | 2 | 4 | 3 | 19 | 18 | 17 | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5;
+    function getExpressionPrecedence(expression: Expression): 1 | -1 | 0 | 2 | 4 | 3 | 19 | 18 | 17 | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5;
+    function getOperator(expression: Expression): SyntaxKind.Unknown | SyntaxKind.EndOfFileToken | SyntaxKind.SingleLineCommentTrivia | SyntaxKind.MultiLineCommentTrivia | SyntaxKind.NewLineTrivia | SyntaxKind.WhitespaceTrivia | SyntaxKind.ShebangTrivia | SyntaxKind.ConflictMarkerTrivia | SyntaxKind.NumericLiteral | SyntaxKind.StringLiteral | SyntaxKind.JsxText | SyntaxKind.JsxTextAllWhiteSpaces | SyntaxKind.RegularExpressionLiteral | SyntaxKind.NoSubstitutionTemplateLiteral | SyntaxKind.TemplateHead | SyntaxKind.TemplateMiddle | SyntaxKind.TemplateTail | SyntaxKind.OpenBraceToken | SyntaxKind.CloseBraceToken | SyntaxKind.OpenParenToken | SyntaxKind.CloseParenToken | SyntaxKind.OpenBracketToken | SyntaxKind.CloseBracketToken | SyntaxKind.DotToken | SyntaxKind.DotDotDotToken | SyntaxKind.SemicolonToken | SyntaxKind.CommaToken | SyntaxKind.LessThanToken | SyntaxKind.LessThanSlashToken | SyntaxKind.GreaterThanToken | SyntaxKind.LessThanEqualsToken | SyntaxKind.GreaterThanEqualsToken | SyntaxKind.EqualsEqualsToken | SyntaxKind.ExclamationEqualsToken | SyntaxKind.EqualsEqualsEqualsToken | SyntaxKind.ExclamationEqualsEqualsToken | SyntaxKind.EqualsGreaterThanToken | SyntaxKind.PlusToken | SyntaxKind.MinusToken | SyntaxKind.AsteriskToken | SyntaxKind.AsteriskAsteriskToken | SyntaxKind.SlashToken | SyntaxKind.PercentToken | SyntaxKind.PlusPlusToken | SyntaxKind.MinusMinusToken | SyntaxKind.LessThanLessThanToken | SyntaxKind.GreaterThanGreaterThanToken | SyntaxKind.GreaterThanGreaterThanGreaterThanToken | SyntaxKind.AmpersandToken | SyntaxKind.BarToken | SyntaxKind.CaretToken | SyntaxKind.ExclamationToken | SyntaxKind.TildeToken | SyntaxKind.AmpersandAmpersandToken | SyntaxKind.BarBarToken | SyntaxKind.QuestionToken | SyntaxKind.ColonToken | SyntaxKind.AtToken | SyntaxKind.EqualsToken | SyntaxKind.PlusEqualsToken | SyntaxKind.MinusEqualsToken | SyntaxKind.AsteriskEqualsToken | SyntaxKind.AsteriskAsteriskEqualsToken | SyntaxKind.SlashEqualsToken | SyntaxKind.PercentEqualsToken | SyntaxKind.LessThanLessThanEqualsToken | SyntaxKind.GreaterThanGreaterThanEqualsToken | SyntaxKind.GreaterThanGreaterThanGreaterThanEqualsToken | SyntaxKind.AmpersandEqualsToken | SyntaxKind.BarEqualsToken | SyntaxKind.CaretEqualsToken | SyntaxKind.Identifier | SyntaxKind.BreakKeyword | SyntaxKind.CaseKeyword | SyntaxKind.CatchKeyword | SyntaxKind.ClassKeyword | SyntaxKind.ConstKeyword | SyntaxKind.ContinueKeyword | SyntaxKind.DebuggerKeyword | SyntaxKind.DefaultKeyword | SyntaxKind.DeleteKeyword | SyntaxKind.DoKeyword | SyntaxKind.ElseKeyword | SyntaxKind.EnumKeyword | SyntaxKind.ExportKeyword | SyntaxKind.ExtendsKeyword | SyntaxKind.FalseKeyword | SyntaxKind.FinallyKeyword | SyntaxKind.ForKeyword | SyntaxKind.FunctionKeyword | SyntaxKind.IfKeyword | SyntaxKind.ImportKeyword | SyntaxKind.InKeyword | SyntaxKind.InstanceOfKeyword | SyntaxKind.NewKeyword | SyntaxKind.NullKeyword | SyntaxKind.ReturnKeyword | SyntaxKind.SuperKeyword | SyntaxKind.SwitchKeyword | SyntaxKind.ThisKeyword | SyntaxKind.ThrowKeyword | SyntaxKind.TrueKeyword | SyntaxKind.TryKeyword | SyntaxKind.TypeOfKeyword | SyntaxKind.VarKeyword | SyntaxKind.VoidKeyword | SyntaxKind.WhileKeyword | SyntaxKind.WithKeyword | SyntaxKind.ImplementsKeyword | SyntaxKind.InterfaceKeyword | SyntaxKind.LetKeyword | SyntaxKind.PackageKeyword | SyntaxKind.PrivateKeyword | SyntaxKind.ProtectedKeyword | SyntaxKind.PublicKeyword | SyntaxKind.StaticKeyword | SyntaxKind.YieldKeyword | SyntaxKind.AbstractKeyword | SyntaxKind.AsKeyword | SyntaxKind.AnyKeyword | SyntaxKind.AsyncKeyword | SyntaxKind.AwaitKeyword | SyntaxKind.BooleanKeyword | SyntaxKind.ConstructorKeyword | SyntaxKind.DeclareKeyword | SyntaxKind.GetKeyword | SyntaxKind.IsKeyword | SyntaxKind.KeyOfKeyword | SyntaxKind.ModuleKeyword | SyntaxKind.NamespaceKeyword | SyntaxKind.NeverKeyword | SyntaxKind.ReadonlyKeyword | SyntaxKind.RequireKeyword | SyntaxKind.NumberKeyword | SyntaxKind.ObjectKeyword | SyntaxKind.SetKeyword | SyntaxKind.StringKeyword | SyntaxKind.SymbolKeyword | SyntaxKind.TypeKeyword | SyntaxKind.UndefinedKeyword | SyntaxKind.FromKeyword | SyntaxKind.GlobalKeyword | SyntaxKind.OfKeyword | SyntaxKind.QualifiedName | SyntaxKind.ComputedPropertyName | SyntaxKind.TypeParameter | SyntaxKind.Parameter | SyntaxKind.Decorator | SyntaxKind.PropertySignature | SyntaxKind.PropertyDeclaration | SyntaxKind.MethodSignature | SyntaxKind.MethodDeclaration | SyntaxKind.Constructor | SyntaxKind.GetAccessor | SyntaxKind.SetAccessor | SyntaxKind.CallSignature | SyntaxKind.ConstructSignature | SyntaxKind.IndexSignature | SyntaxKind.TypePredicate | SyntaxKind.TypeReference | SyntaxKind.FunctionType | SyntaxKind.ConstructorType | SyntaxKind.TypeQuery | SyntaxKind.TypeLiteral | SyntaxKind.ArrayType | SyntaxKind.TupleType | SyntaxKind.UnionType | SyntaxKind.IntersectionType | SyntaxKind.ParenthesizedType | SyntaxKind.ThisType | SyntaxKind.TypeOperator | SyntaxKind.IndexedAccessType | SyntaxKind.MappedType | SyntaxKind.LiteralType | SyntaxKind.ObjectBindingPattern | SyntaxKind.ArrayBindingPattern | SyntaxKind.BindingElement | SyntaxKind.ArrayLiteralExpression | SyntaxKind.ObjectLiteralExpression | SyntaxKind.PropertyAccessExpression | SyntaxKind.ElementAccessExpression | SyntaxKind.CallExpression | SyntaxKind.NewExpression | SyntaxKind.TaggedTemplateExpression | SyntaxKind.TypeAssertionExpression | SyntaxKind.ParenthesizedExpression | SyntaxKind.FunctionExpression | SyntaxKind.ArrowFunction | SyntaxKind.DeleteExpression | SyntaxKind.TypeOfExpression | SyntaxKind.VoidExpression | SyntaxKind.AwaitExpression | SyntaxKind.ConditionalExpression | SyntaxKind.TemplateExpression | SyntaxKind.YieldExpression | SyntaxKind.SpreadElement | SyntaxKind.ClassExpression | SyntaxKind.OmittedExpression | SyntaxKind.ExpressionWithTypeArguments | SyntaxKind.AsExpression | SyntaxKind.NonNullExpression | SyntaxKind.MetaProperty | SyntaxKind.TemplateSpan | SyntaxKind.SemicolonClassElement | SyntaxKind.Block | SyntaxKind.VariableStatement | SyntaxKind.EmptyStatement | SyntaxKind.ExpressionStatement | SyntaxKind.IfStatement | SyntaxKind.DoStatement | SyntaxKind.WhileStatement | SyntaxKind.ForStatement | SyntaxKind.ForInStatement | SyntaxKind.ForOfStatement | SyntaxKind.ContinueStatement | SyntaxKind.BreakStatement | SyntaxKind.ReturnStatement | SyntaxKind.WithStatement | SyntaxKind.SwitchStatement | SyntaxKind.LabeledStatement | SyntaxKind.ThrowStatement | SyntaxKind.TryStatement | SyntaxKind.DebuggerStatement | SyntaxKind.VariableDeclaration | SyntaxKind.VariableDeclarationList | SyntaxKind.FunctionDeclaration | SyntaxKind.ClassDeclaration | SyntaxKind.InterfaceDeclaration | SyntaxKind.TypeAliasDeclaration | SyntaxKind.EnumDeclaration | SyntaxKind.ModuleDeclaration | SyntaxKind.ModuleBlock | SyntaxKind.CaseBlock | SyntaxKind.NamespaceExportDeclaration | SyntaxKind.ImportEqualsDeclaration | SyntaxKind.ImportDeclaration | SyntaxKind.ImportClause | SyntaxKind.NamespaceImport | SyntaxKind.NamedImports | SyntaxKind.ImportSpecifier | SyntaxKind.ExportAssignment | SyntaxKind.ExportDeclaration | SyntaxKind.NamedExports | SyntaxKind.ExportSpecifier | SyntaxKind.MissingDeclaration | SyntaxKind.ExternalModuleReference | SyntaxKind.JsxElement | SyntaxKind.JsxSelfClosingElement | SyntaxKind.JsxOpeningElement | SyntaxKind.JsxClosingElement | SyntaxKind.JsxAttribute | SyntaxKind.JsxAttributes | SyntaxKind.JsxSpreadAttribute | SyntaxKind.JsxExpression | SyntaxKind.CaseClause | SyntaxKind.DefaultClause | SyntaxKind.HeritageClause | SyntaxKind.CatchClause | SyntaxKind.PropertyAssignment | SyntaxKind.ShorthandPropertyAssignment | SyntaxKind.SpreadAssignment | SyntaxKind.EnumMember | SyntaxKind.SourceFile | SyntaxKind.Bundle | SyntaxKind.JSDocTypeExpression | SyntaxKind.JSDocAllType | SyntaxKind.JSDocUnknownType | SyntaxKind.JSDocArrayType | SyntaxKind.JSDocUnionType | SyntaxKind.JSDocTupleType | SyntaxKind.JSDocNullableType | SyntaxKind.JSDocNonNullableType | SyntaxKind.JSDocRecordType | SyntaxKind.JSDocRecordMember | SyntaxKind.JSDocTypeReference | SyntaxKind.JSDocOptionalType | SyntaxKind.JSDocFunctionType | SyntaxKind.JSDocVariadicType | SyntaxKind.JSDocConstructorType | SyntaxKind.JSDocThisType | SyntaxKind.JSDocComment | SyntaxKind.JSDocTag | SyntaxKind.JSDocAugmentsTag | SyntaxKind.JSDocClassTag | SyntaxKind.JSDocParameterTag | SyntaxKind.JSDocReturnTag | SyntaxKind.JSDocTypeTag | SyntaxKind.JSDocTemplateTag | SyntaxKind.JSDocTypedefTag | SyntaxKind.JSDocPropertyTag | SyntaxKind.JSDocTypeLiteral | SyntaxKind.JSDocLiteralType | SyntaxKind.SyntaxList | SyntaxKind.NotEmittedStatement | SyntaxKind.PartiallyEmittedExpression | SyntaxKind.CommaListExpression | SyntaxKind.MergeDeclarationMarker | SyntaxKind.EndOfDeclarationMarker | SyntaxKind.Count;
+    function getOperatorPrecedence(nodeKind: SyntaxKind, operatorKind: SyntaxKind, hasArguments?: boolean): 1 | -1 | 0 | 2 | 4 | 3 | 19 | 18 | 17 | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5;
     function createDiagnosticCollection(): DiagnosticCollection;
     /**
      * Based heavily on the abstract 'Quote'/'QuoteJSONString' operation from ECMA-262 (24.3.2.2),
@@ -3079,28 +4145,12 @@ declare namespace ts {
      */
     function escapeString(s: string): string;
     function isIntrinsicJsxName(name: string): boolean;
-    function escapeNonAsciiCharacters(s: string): string;
-    interface EmitTextWriter {
-        write(s: string): void;
-        writeTextOfNode(text: string, node: Node): void;
-        writeLine(): void;
-        increaseIndent(): void;
-        decreaseIndent(): void;
-        getText(): string;
-        rawWrite(s: string): void;
-        writeLiteral(s: string): void;
-        getTextPos(): number;
-        getLine(): number;
-        getColumn(): number;
-        getIndent(): number;
-        isAtStartOfLine(): boolean;
-        reset(): void;
-    }
+    function escapeNonAsciiString(s: string): string;
     function getIndentString(level: number): string;
     function getIndentSize(): number;
-    function createTextWriter(newLine: String): EmitTextWriter;
+    function createTextWriter(newLine: string): EmitTextWriter;
     function getResolvedExternalModuleName(host: EmitHost, file: SourceFile): string;
-    function getExternalModuleNameFromDeclaration(host: EmitHost, resolver: EmitResolver, declaration: ImportEqualsDeclaration | ImportDeclaration | ExportDeclaration): string;
+    function getExternalModuleNameFromDeclaration(host: EmitHost, resolver: EmitResolver, declaration: ImportEqualsDeclaration | ImportDeclaration | ExportDeclaration | ModuleDeclaration): string;
     /**
      * Resolves a local path to a path which is absolute to the base of the emit
      */
@@ -3122,34 +4172,19 @@ declare namespace ts {
      * @param targetSourceFile An optional target source file to emit.
      */
     function getSourceFilesToEmit(host: EmitHost, targetSourceFile?: SourceFile): SourceFile[];
-    /**
-     * Iterates over each source file to emit. The source files are expected to have been
-     * transformed for use by the pretty printer.
-     *
-     * Originally part of `forEachExpectedEmitFile`, this functionality was extracted to support
-     * transformations.
-     *
-     * @param host An EmitHost.
-     * @param sourceFiles The transformed source files to emit.
-     * @param action The action to execute.
-     */
-    function forEachTransformedEmitFile(host: EmitHost, sourceFiles: SourceFile[], action: (jsFilePath: string, sourceMapFilePath: string, declarationFilePath: string, sourceFiles: SourceFile[], isBundledEmit: boolean) => void, emitOnlyDtsFiles?: boolean): void;
-    /**
-     * Iterates over the source files that are expected to have an emit output. This function
-     * is used by the legacy emitter and the declaration emitter and should not be used by
-     * the tree transforming emitter.
-     *
-     * @param host An EmitHost.
-     * @param action The action to execute.
-     * @param targetSourceFile An optional target source file to emit.
-     */
-    function forEachExpectedEmitFile(host: EmitHost, action: (emitFileNames: EmitFileNames, sourceFiles: SourceFile[], isBundledEmit: boolean, emitOnlyDtsFiles: boolean) => void, targetSourceFile?: SourceFile, emitOnlyDtsFiles?: boolean): void;
+    /** Don't call this for `--outFile`, just for `--outDir` or plain emit. `--outFile` needs additional checks. */
+    function sourceFileMayBeEmitted(sourceFile: SourceFile, options: CompilerOptions, isSourceFileFromExternalLibrary: (file: SourceFile) => boolean): boolean;
     function getSourceFilePathInNewDir(sourceFile: SourceFile, host: EmitHost, newDirPath: string): string;
     function writeFile(host: EmitHost, diagnostics: DiagnosticCollection, fileName: string, data: string, writeByteOrderMark: boolean, sourceFiles?: SourceFile[]): void;
     function getLineOfLocalPosition(currentSourceFile: SourceFile, pos: number): number;
     function getLineOfLocalPositionFromLineMap(lineMap: number[], pos: number): number;
     function getFirstConstructorWithBody(node: ClassLikeDeclaration): ConstructorDeclaration;
-    function getSetAccessorTypeAnnotationNode(accessor: AccessorDeclaration): TypeNode;
+    /** Get the type annotation for the value parameter. */
+    function getSetAccessorTypeAnnotationNode(accessor: SetAccessorDeclaration): TypeNode;
+    function getThisParameter(signature: SignatureDeclaration): ParameterDeclaration | undefined;
+    function parameterIsThisKeyword(parameter: ParameterDeclaration): boolean;
+    function isThisIdentifier(node: Node | undefined): boolean;
+    function identifierIsThisKeyword(id: Identifier): boolean;
     interface AllAccessorDeclarations {
         firstAccessor: AccessorDeclaration;
         secondAccessor: AccessorDeclaration;
@@ -3157,15 +4192,35 @@ declare namespace ts {
         setAccessor: AccessorDeclaration;
     }
     function getAllAccessorDeclarations(declarations: NodeArray<Declaration>, accessor: AccessorDeclaration): AllAccessorDeclarations;
-    function emitNewLineBeforeLeadingComments(lineMap: number[], writer: EmitTextWriter, node: TextRange, leadingComments: CommentRange[]): void;
-    function emitNewLineBeforeLeadingCommentsOfPosition(lineMap: number[], writer: EmitTextWriter, pos: number, leadingComments: CommentRange[]): void;
-    function emitNewLineBeforeLeadingCommentOfPosition(lineMap: number[], writer: EmitTextWriter, pos: number, commentPos: number): void;
-    function emitComments(text: string, lineMap: number[], writer: EmitTextWriter, comments: CommentRange[], leadingSeparator: boolean, trailingSeparator: boolean, newLine: string, writeComment: (text: string, lineMap: number[], writer: EmitTextWriter, commentPos: number, commentEnd: number, newLine: string) => void): void;
     /**
-     * Detached comment is a comment at the top of file or function body that is separated from
-     * the next statement by space.
+     * Gets the effective type annotation of a variable, parameter, or property. If the node was
+     * parsed in a JavaScript file, gets the type annotation from JSDoc.
      */
-    function emitDetachedComments(text: string, lineMap: number[], writer: EmitTextWriter, writeComment: (text: string, lineMap: number[], writer: EmitTextWriter, commentPos: number, commentEnd: number, newLine: string) => void, node: TextRange, newLine: string, removeComments: boolean): {
+    function getEffectiveTypeAnnotationNode(node: VariableLikeDeclaration): TypeNode;
+    /**
+     * Gets the effective return type annotation of a signature. If the node was parsed in a
+     * JavaScript file, gets the return type annotation from JSDoc.
+     */
+    function getEffectiveReturnTypeNode(node: SignatureDeclaration): TypeNode;
+    /**
+     * Gets the effective type parameters. If the node was parsed in a
+     * JavaScript file, gets the type parameters from the `@template` tag from JSDoc.
+     */
+    function getEffectiveTypeParameterDeclarations(node: DeclarationWithTypeParameters): TypeParameterDeclaration[];
+    /**
+     * Gets the effective type annotation of the value parameter of a set accessor. If the node
+     * was parsed in a JavaScript file, gets the type annotation from JSDoc.
+     */
+    function getEffectiveSetAccessorTypeAnnotationNode(node: SetAccessorDeclaration): TypeNode;
+    function emitNewLineBeforeLeadingComments(lineMap: number[], writer: EmitTextWriter, node: TextRange, leadingComments: CommentRange[]): void;
+    function emitNewLineBeforeLeadingCommentsOfPosition(lineMap: number[], writer: EmitTextWriter, pos: number, leadingComments: CommentRange[]): void;
+    function emitNewLineBeforeLeadingCommentOfPosition(lineMap: number[], writer: EmitTextWriter, pos: number, commentPos: number): void;
+    function emitComments(text: string, lineMap: number[], writer: EmitTextWriter, comments: CommentRange[], leadingSeparator: boolean, trailingSeparator: boolean, newLine: string, writeComment: (text: string, lineMap: number[], writer: EmitTextWriter, commentPos: number, commentEnd: number, newLine: string) => void): void;
+    /**
+     * Detached comment is a comment at the top of file or function body that is separated from
+     * the next statement by space.
+     */
+    function emitDetachedComments(text: string, lineMap: number[], writer: EmitTextWriter, writeComment: (text: string, lineMap: number[], writer: EmitTextWriter, commentPos: number, commentEnd: number, newLine: string) => void, node: TextRange, newLine: string, removeComments: boolean): {
         nodePos: number;
         detachedCommentEndPos: number;
     };
@@ -3173,30 +4228,30 @@ declare namespace ts {
     function hasModifiers(node: Node): boolean;
     function hasModifier(node: Node, flags: ModifierFlags): boolean;
     function getModifierFlags(node: Node): ModifierFlags;
+    function getModifierFlagsNoCache(node: Node): ModifierFlags;
     function modifierToFlag(token: SyntaxKind): ModifierFlags;
     function isLogicalOperator(token: SyntaxKind): boolean;
     function isAssignmentOperator(token: SyntaxKind): boolean;
     /** Get `C` given `N` if `N` is in the position `class C extends N` where `N` is an ExpressionWithTypeArguments. */
     function tryGetClassExtendingExpressionWithTypeArguments(node: Node): ClassLikeDeclaration | undefined;
-    function isDestructuringAssignment(node: Node): node is BinaryExpression;
+    function isAssignmentExpression(node: Node, excludeCompoundAssignment: true): node is AssignmentExpression<EqualsToken>;
+    function isAssignmentExpression(node: Node, excludeCompoundAssignment?: false): node is AssignmentExpression<AssignmentOperatorToken>;
+    function isDestructuringAssignment(node: Node): node is DestructuringAssignment;
     function isSupportedExpressionWithTypeArguments(node: ExpressionWithTypeArguments): boolean;
     function isExpressionWithTypeArgumentsInClassExtendsClause(node: Node): boolean;
+    function isExpressionWithTypeArgumentsInClassImplementsClause(node: Node): node is ExpressionWithTypeArguments;
     function isEntityNameExpression(node: Expression): node is EntityNameExpression;
     function isRightSideOfQualifiedNameOrPropertyAccess(node: Node): boolean;
-    function isEmptyObjectLiteralOrArrayLiteral(expression: Node): boolean;
+    function isEmptyObjectLiteral(expression: Node): boolean;
+    function isEmptyArrayLiteral(expression: Node): boolean;
     function getLocalSymbolForExportDefault(symbol: Symbol): Symbol;
     /** Return ".ts", ".d.ts", or ".tsx", if that is the extension. */
     function tryExtractTypeScriptExtension(fileName: string): string | undefined;
-    /**
-     * Serialize an object graph into a JSON string. This is intended only for use on an acyclic graph
-     * as the fallback implementation does not check for circular references by default.
-     */
-    const stringify: (value: any) => string;
     /**
      * Converts a string to a base-64 encoded ASCII string.
      */
     function convertToBase64(input: string): string;
-    function getNewLineCharacter(options: CompilerOptions): string;
+    function getNewLineCharacter(options: CompilerOptions | PrinterOptions): string;
     /**
      * Tests whether a node and its subtree is simple enough to have its position
      * information ignored when emitting source maps in a destructuring assignment.
@@ -3205,6 +4260,14 @@ declare namespace ts {
      */
     function isSimpleExpression(node: Expression): boolean;
     function formatSyntaxKind(kind: SyntaxKind): string;
+    function formatModifierFlags(flags: ModifierFlags): string;
+    function formatTransformFlags(flags: TransformFlags): string;
+    function formatEmitFlags(flags: EmitFlags): string;
+    function formatSymbolFlags(flags: SymbolFlags): string;
+    function formatTypeFlags(flags: TypeFlags): string;
+    function formatObjectFlags(flags: ObjectFlags): string;
+    function getRangePos(range: TextRange | undefined): number;
+    function getRangeEnd(range: TextRange | undefined): number;
     /**
      * Increases (or decreases) a position by the provided amount.
      *
@@ -3275,12 +4338,11 @@ declare namespace ts {
     function rangeEndIsOnSameLineAsRangeStart(range1: TextRange, range2: TextRange, sourceFile: SourceFile): boolean;
     function positionsAreOnSameLine(pos1: number, pos2: number, sourceFile: SourceFile): boolean;
     function getStartPositionOfRange(range: TextRange, sourceFile: SourceFile): number;
-    function collectExternalModuleInfo(sourceFile: SourceFile, resolver: EmitResolver): {
-        externalImports: (ImportEqualsDeclaration | ImportDeclaration | ExportDeclaration)[];
-        exportSpecifiers: Map<ExportSpecifier[]>;
-        exportEquals: ExportAssignment;
-        hasExportStarsToExportValues: boolean;
-    };
+    /**
+     * Determines whether a name was originally the declaration name of an enum or namespace
+     * declaration.
+     */
+    function isDeclarationNameOfEnumOrNamespace(node: Identifier): boolean;
     function getInitializedVariables(node: VariableDeclarationList): VariableDeclaration[];
     /**
      * Gets a value indicating whether a node is merged with a class declaration in the same scope.
@@ -3293,27 +4355,273 @@ declare namespace ts {
      * @param kind The SyntaxKind to find among related declarations.
      */
     function isFirstDeclarationOfKind(node: Node, kind: SyntaxKind): boolean;
-    function isNodeArray<T extends Node>(array: T[]): array is NodeArray<T>;
+    function isWatchSet(options: CompilerOptions): boolean;
+    function getCheckFlags(symbol: Symbol): CheckFlags;
+    function getDeclarationModifierFlagsFromSymbol(s: Symbol): ModifierFlags;
+    function levenshtein(s1: string, s2: string): number;
+}
+declare namespace ts {
+    function getDefaultLibFileName(options: CompilerOptions): string;
+    function textSpanEnd(span: TextSpan): number;
+    function textSpanIsEmpty(span: TextSpan): boolean;
+    function textSpanContainsPosition(span: TextSpan, position: number): boolean;
+    function textSpanContainsTextSpan(span: TextSpan, other: TextSpan): boolean;
+    function textSpanOverlapsWith(span: TextSpan, other: TextSpan): boolean;
+    function textSpanOverlap(span1: TextSpan, span2: TextSpan): TextSpan;
+    function textSpanIntersectsWithTextSpan(span: TextSpan, other: TextSpan): boolean;
+    function textSpanIntersectsWith(span: TextSpan, start: number, length: number): boolean;
+    function decodedTextSpanIntersectsWith(start1: number, length1: number, start2: number, length2: number): boolean;
+    function textSpanIntersectsWithPosition(span: TextSpan, position: number): boolean;
+    function textSpanIntersection(span1: TextSpan, span2: TextSpan): TextSpan;
+    function createTextSpan(start: number, length: number): TextSpan;
+    function createTextSpanFromBounds(start: number, end: number): TextSpan;
+    function textChangeRangeNewSpan(range: TextChangeRange): TextSpan;
+    function textChangeRangeIsUnchanged(range: TextChangeRange): boolean;
+    function createTextChangeRange(span: TextSpan, newLength: number): TextChangeRange;
+    let unchangedTextChangeRange: TextChangeRange;
+    /**
+     * Called to merge all the changes that occurred across several versions of a script snapshot
+     * into a single change.  i.e. if a user keeps making successive edits to a script we will
+     * have a text change from V1 to V2, V2 to V3, ..., Vn.
+     *
+     * This function will then merge those changes into a single change range valid between V1 and
+     * Vn.
+     */
+    function collapseTextChangeRangesAcrossMultipleVersions(changes: TextChangeRange[]): TextChangeRange;
+    function getTypeParameterOwner(d: Declaration): Declaration;
+    function isParameterPropertyDeclaration(node: Node): boolean;
+    function getCombinedModifierFlags(node: Node): ModifierFlags;
+    function getCombinedNodeFlags(node: Node): NodeFlags;
+    /**
+     * Checks to see if the locale is in the appropriate format,
+     * and if it is, attempts to set the appropriate language.
+     */
+    function validateLocaleAndSetLanguage(locale: string, sys: {
+        getExecutingFilePath(): string;
+        resolvePath(path: string): string;
+        fileExists(fileName: string): boolean;
+        readFile(fileName: string): string;
+    }, errors?: Diagnostic[]): void;
+    function getOriginalNode(node: Node): Node;
+    function getOriginalNode<T extends Node>(node: Node, nodeTest: (node: Node) => node is T): T;
+    /**
+     * Gets a value indicating whether a node originated in the parse tree.
+     *
+     * @param node The node to test.
+     */
+    function isParseTreeNode(node: Node): boolean;
+    /**
+     * Gets the original parse tree node for a node.
+     *
+     * @param node The original node.
+     * @returns The original parse tree node if found; otherwise, undefined.
+     */
+    function getParseTreeNode(node: Node): Node;
+    /**
+     * Gets the original parse tree node for a node.
+     *
+     * @param node The original node.
+     * @param nodeTest A callback used to ensure the correct type of parse tree node is returned.
+     * @returns The original parse tree node if found; otherwise, undefined.
+     */
+    function getParseTreeNode<T extends Node>(node: Node, nodeTest?: (node: Node) => node is T): T;
+    /**
+     * Remove extra underscore from escaped identifier text content.
+     *
+     * @param identifier The escaped identifier text.
+     * @returns The unescaped identifier text.
+     */
+    function unescapeIdentifier(identifier: string): string;
+    function getNameOfDeclaration(declaration: Declaration): DeclarationName | undefined;
+}
+declare namespace ts {
+    function isNumericLiteral(node: Node): node is NumericLiteral;
+    function isStringLiteral(node: Node): node is StringLiteral;
+    function isJsxText(node: Node): node is JsxText;
+    function isRegularExpressionLiteral(node: Node): node is RegularExpressionLiteral;
     function isNoSubstitutionTemplateLiteral(node: Node): node is LiteralExpression;
+    function isTemplateHead(node: Node): node is TemplateHead;
+    function isTemplateMiddle(node: Node): node is TemplateMiddle;
+    function isTemplateTail(node: Node): node is TemplateTail;
+    function isIdentifier(node: Node): node is Identifier;
+    function isQualifiedName(node: Node): node is QualifiedName;
+    function isComputedPropertyName(node: Node): node is ComputedPropertyName;
+    function isTypeParameterDeclaration(node: Node): node is TypeParameterDeclaration;
+    function isParameter(node: Node): node is ParameterDeclaration;
+    function isDecorator(node: Node): node is Decorator;
+    function isPropertySignature(node: Node): node is PropertySignature;
+    function isPropertyDeclaration(node: Node): node is PropertyDeclaration;
+    function isMethodSignature(node: Node): node is MethodSignature;
+    function isMethodDeclaration(node: Node): node is MethodDeclaration;
+    function isConstructorDeclaration(node: Node): node is ConstructorDeclaration;
+    function isGetAccessorDeclaration(node: Node): node is GetAccessorDeclaration;
+    function isSetAccessorDeclaration(node: Node): node is SetAccessorDeclaration;
+    function isCallSignatureDeclaration(node: Node): node is CallSignatureDeclaration;
+    function isConstructSignatureDeclaration(node: Node): node is ConstructSignatureDeclaration;
+    function isIndexSignatureDeclaration(node: Node): node is IndexSignatureDeclaration;
+    function isTypePredicateNode(node: Node): node is TypePredicateNode;
+    function isTypeReferenceNode(node: Node): node is TypeReferenceNode;
+    function isFunctionTypeNode(node: Node): node is FunctionTypeNode;
+    function isConstructorTypeNode(node: Node): node is ConstructorTypeNode;
+    function isTypeQueryNode(node: Node): node is TypeQueryNode;
+    function isTypeLiteralNode(node: Node): node is TypeLiteralNode;
+    function isArrayTypeNode(node: Node): node is ArrayTypeNode;
+    function isTupleTypeNode(node: Node): node is TupleTypeNode;
+    function isUnionTypeNode(node: Node): node is UnionTypeNode;
+    function isIntersectionTypeNode(node: Node): node is IntersectionTypeNode;
+    function isParenthesizedTypeNode(node: Node): node is ParenthesizedTypeNode;
+    function isThisTypeNode(node: Node): node is ThisTypeNode;
+    function isTypeOperatorNode(node: Node): node is TypeOperatorNode;
+    function isIndexedAccessTypeNode(node: Node): node is IndexedAccessTypeNode;
+    function isMappedTypeNode(node: Node): node is MappedTypeNode;
+    function isLiteralTypeNode(node: Node): node is LiteralTypeNode;
+    function isObjectBindingPattern(node: Node): node is ObjectBindingPattern;
+    function isArrayBindingPattern(node: Node): node is ArrayBindingPattern;
+    function isBindingElement(node: Node): node is BindingElement;
+    function isArrayLiteralExpression(node: Node): node is ArrayLiteralExpression;
+    function isObjectLiteralExpression(node: Node): node is ObjectLiteralExpression;
+    function isPropertyAccessExpression(node: Node): node is PropertyAccessExpression;
+    function isElementAccessExpression(node: Node): node is ElementAccessExpression;
+    function isCallExpression(node: Node): node is CallExpression;
+    function isNewExpression(node: Node): node is NewExpression;
+    function isTaggedTemplateExpression(node: Node): node is TaggedTemplateExpression;
+    function isTypeAssertion(node: Node): node is TypeAssertion;
+    function isParenthesizedExpression(node: Node): node is ParenthesizedExpression;
+    function skipPartiallyEmittedExpressions(node: Expression): Expression;
+    function skipPartiallyEmittedExpressions(node: Node): Node;
+    function isFunctionExpression(node: Node): node is FunctionExpression;
+    function isArrowFunction(node: Node): node is ArrowFunction;
+    function isDeleteExpression(node: Node): node is DeleteExpression;
+    function isTypeOfExpression(node: Node): node is TypeOfExpression;
+    function isVoidExpression(node: Node): node is VoidExpression;
+    function isAwaitExpression(node: Node): node is AwaitExpression;
+    function isPrefixUnaryExpression(node: Node): node is PrefixUnaryExpression;
+    function isPostfixUnaryExpression(node: Node): node is PostfixUnaryExpression;
+    function isBinaryExpression(node: Node): node is BinaryExpression;
+    function isConditionalExpression(node: Node): node is ConditionalExpression;
+    function isTemplateExpression(node: Node): node is TemplateExpression;
+    function isYieldExpression(node: Node): node is YieldExpression;
+    function isSpreadElement(node: Node): node is SpreadElement;
+    function isClassExpression(node: Node): node is ClassExpression;
+    function isOmittedExpression(node: Node): node is OmittedExpression;
+    function isExpressionWithTypeArguments(node: Node): node is ExpressionWithTypeArguments;
+    function isAsExpression(node: Node): node is AsExpression;
+    function isNonNullExpression(node: Node): node is NonNullExpression;
+    function isMetaProperty(node: Node): node is MetaProperty;
+    function isTemplateSpan(node: Node): node is TemplateSpan;
+    function isSemicolonClassElement(node: Node): node is SemicolonClassElement;
+    function isBlock(node: Node): node is Block;
+    function isVariableStatement(node: Node): node is VariableStatement;
+    function isEmptyStatement(node: Node): node is EmptyStatement;
+    function isExpressionStatement(node: Node): node is ExpressionStatement;
+    function isIfStatement(node: Node): node is IfStatement;
+    function isDoStatement(node: Node): node is DoStatement;
+    function isWhileStatement(node: Node): node is WhileStatement;
+    function isForStatement(node: Node): node is ForStatement;
+    function isForInStatement(node: Node): node is ForInStatement;
+    function isForOfStatement(node: Node): node is ForOfStatement;
+    function isContinueStatement(node: Node): node is ContinueStatement;
+    function isBreakStatement(node: Node): node is BreakStatement;
+    function isReturnStatement(node: Node): node is ReturnStatement;
+    function isWithStatement(node: Node): node is WithStatement;
+    function isSwitchStatement(node: Node): node is SwitchStatement;
+    function isLabeledStatement(node: Node): node is LabeledStatement;
+    function isThrowStatement(node: Node): node is ThrowStatement;
+    function isTryStatement(node: Node): node is TryStatement;
+    function isDebuggerStatement(node: Node): node is DebuggerStatement;
+    function isVariableDeclaration(node: Node): node is VariableDeclaration;
+    function isVariableDeclarationList(node: Node): node is VariableDeclarationList;
+    function isFunctionDeclaration(node: Node): node is FunctionDeclaration;
+    function isClassDeclaration(node: Node): node is ClassDeclaration;
+    function isInterfaceDeclaration(node: Node): node is InterfaceDeclaration;
+    function isTypeAliasDeclaration(node: Node): node is TypeAliasDeclaration;
+    function isEnumDeclaration(node: Node): node is EnumDeclaration;
+    function isModuleDeclaration(node: Node): node is ModuleDeclaration;
+    function isModuleBlock(node: Node): node is ModuleBlock;
+    function isCaseBlock(node: Node): node is CaseBlock;
+    function isNamespaceExportDeclaration(node: Node): node is NamespaceExportDeclaration;
+    function isImportEqualsDeclaration(node: Node): node is ImportEqualsDeclaration;
+    function isImportDeclaration(node: Node): node is ImportDeclaration;
+    function isImportClause(node: Node): node is ImportClause;
+    function isNamespaceImport(node: Node): node is NamespaceImport;
+    function isNamedImports(node: Node): node is NamedImports;
+    function isImportSpecifier(node: Node): node is ImportSpecifier;
+    function isExportAssignment(node: Node): node is ExportAssignment;
+    function isExportDeclaration(node: Node): node is ExportDeclaration;
+    function isNamedExports(node: Node): node is NamedExports;
+    function isExportSpecifier(node: Node): node is ExportSpecifier;
+    function isMissingDeclaration(node: Node): node is MissingDeclaration;
+    function isExternalModuleReference(node: Node): node is ExternalModuleReference;
+    function isJsxElement(node: Node): node is JsxElement;
+    function isJsxSelfClosingElement(node: Node): node is JsxSelfClosingElement;
+    function isJsxOpeningElement(node: Node): node is JsxOpeningElement;
+    function isJsxClosingElement(node: Node): node is JsxClosingElement;
+    function isJsxAttribute(node: Node): node is JsxAttribute;
+    function isJsxAttributes(node: Node): node is JsxAttributes;
+    function isJsxSpreadAttribute(node: Node): node is JsxSpreadAttribute;
+    function isJsxExpression(node: Node): node is JsxExpression;
+    function isCaseClause(node: Node): node is CaseClause;
+    function isDefaultClause(node: Node): node is DefaultClause;
+    function isHeritageClause(node: Node): node is HeritageClause;
+    function isCatchClause(node: Node): node is CatchClause;
+    function isPropertyAssignment(node: Node): node is PropertyAssignment;
+    function isShorthandPropertyAssignment(node: Node): node is ShorthandPropertyAssignment;
+    function isSpreadAssignment(node: Node): node is SpreadAssignment;
+    function isEnumMember(node: Node): node is EnumMember;
+    function isSourceFile(node: Node): node is SourceFile;
+    function isBundle(node: Node): node is Bundle;
+    function isJSDocTypeExpression(node: Node): node is JSDocTypeExpression;
+    function isJSDocAllType(node: JSDocAllType): node is JSDocAllType;
+    function isJSDocUnknownType(node: Node): node is JSDocUnknownType;
+    function isJSDocArrayType(node: Node): node is JSDocArrayType;
+    function isJSDocUnionType(node: Node): node is JSDocUnionType;
+    function isJSDocTupleType(node: Node): node is JSDocTupleType;
+    function isJSDocNullableType(node: Node): node is JSDocNullableType;
+    function isJSDocNonNullableType(node: Node): node is JSDocNonNullableType;
+    function isJSDocRecordType(node: Node): node is JSDocRecordType;
+    function isJSDocRecordMember(node: Node): node is JSDocRecordMember;
+    function isJSDocTypeReference(node: Node): node is JSDocTypeReference;
+    function isJSDocOptionalType(node: Node): node is JSDocOptionalType;
+    function isJSDocFunctionType(node: Node): node is JSDocFunctionType;
+    function isJSDocVariadicType(node: Node): node is JSDocVariadicType;
+    function isJSDocConstructorType(node: Node): node is JSDocConstructorType;
+    function isJSDocThisType(node: Node): node is JSDocThisType;
+    function isJSDoc(node: Node): node is JSDoc;
+    function isJSDocAugmentsTag(node: Node): node is JSDocAugmentsTag;
+    function isJSDocParameterTag(node: Node): node is JSDocParameterTag;
+    function isJSDocReturnTag(node: Node): node is JSDocReturnTag;
+    function isJSDocTypeTag(node: Node): node is JSDocTypeTag;
+    function isJSDocTemplateTag(node: Node): node is JSDocTemplateTag;
+    function isJSDocTypedefTag(node: Node): node is JSDocTypedefTag;
+    function isJSDocPropertyTag(node: Node): node is JSDocPropertyTag;
+    function isJSDocTypeLiteral(node: Node): node is JSDocTypeLiteral;
+    function isJSDocLiteralType(node: Node): node is JSDocLiteralType;
+}
+declare namespace ts {
+    function isNode(node: Node): boolean;
+    function isNodeKind(kind: SyntaxKind): boolean;
+    /**
+     * True if node is of some token syntax kind.
+     * For example, this is true for an IfKeyword but not for an IfStatement.
+     */
+    function isToken(n: Node): boolean;
+    function isNodeArray<T extends Node>(array: T[]): array is NodeArray<T>;
     function isLiteralKind(kind: SyntaxKind): boolean;
-    function isTextualLiteralKind(kind: SyntaxKind): boolean;
     function isLiteralExpression(node: Node): node is LiteralExpression;
     function isTemplateLiteralKind(kind: SyntaxKind): boolean;
-    function isTemplateLiteralFragment(node: Node): node is TemplateLiteralFragment;
-    function isIdentifier(node: Node): node is Identifier;
-    function isGeneratedIdentifier(node: Node): boolean;
+    function isTemplateMiddleOrTemplateTail(node: Node): node is TemplateMiddle | TemplateTail;
+    function isGeneratedIdentifier(node: Node): node is GeneratedIdentifier;
+    function isModifierKind(token: SyntaxKind): boolean;
     function isModifier(node: Node): node is Modifier;
-    function isQualifiedName(node: Node): node is QualifiedName;
-    function isComputedPropertyName(node: Node): node is ComputedPropertyName;
     function isEntityName(node: Node): node is EntityName;
     function isPropertyName(node: Node): node is PropertyName;
-    function isModuleName(node: Node): node is ModuleName;
     function isBindingName(node: Node): node is BindingName;
-    function isTypeParameter(node: Node): node is TypeParameterDeclaration;
-    function isParameter(node: Node): node is ParameterDeclaration;
-    function isDecorator(node: Node): node is Decorator;
-    function isMethodDeclaration(node: Node): node is MethodDeclaration;
+    function isFunctionLike(node: Node): node is FunctionLikeDeclaration;
+    function isFunctionLikeKind(kind: SyntaxKind): boolean;
     function isClassElement(node: Node): node is ClassElement;
+    function isClassLike(node: Node): node is ClassLikeDeclaration;
+    function isAccessor(node: Node): node is AccessorDeclaration;
+    function isTypeElement(node: Node): node is TypeElement;
     function isObjectLiteralElementLike(node: Node): node is ObjectLiteralElementLike;
     /**
      * Node test that determines whether a node is a valid type node.
@@ -3321,17 +4629,30 @@ declare namespace ts {
      * of a TypeNode.
      */
     function isTypeNode(node: Node): node is TypeNode;
+    function isFunctionOrConstructorTypeNode(node: Node): node is FunctionTypeNode | ConstructorTypeNode;
     function isBindingPattern(node: Node): node is BindingPattern;
-    function isBindingElement(node: Node): node is BindingElement;
+    function isAssignmentPattern(node: Node): node is AssignmentPattern;
     function isArrayBindingElement(node: Node): node is ArrayBindingElement;
-    function isPropertyAccessExpression(node: Node): node is PropertyAccessExpression;
-    function isElementAccessExpression(node: Node): node is ElementAccessExpression;
-    function isBinaryExpression(node: Node): node is BinaryExpression;
-    function isConditionalExpression(node: Node): node is ConditionalExpression;
-    function isCallExpression(node: Node): node is CallExpression;
-    function isTemplate(node: Node): node is Template;
-    function isSpreadElementExpression(node: Node): node is SpreadElementExpression;
-    function isExpressionWithTypeArguments(node: Node): node is ExpressionWithTypeArguments;
+    /**
+     * Determines whether the BindingOrAssignmentElement is a BindingElement-like declaration
+     */
+    function isDeclarationBindingElement(bindingElement: BindingOrAssignmentElement): bindingElement is VariableDeclaration | ParameterDeclaration | BindingElement;
+    /**
+     * Determines whether a node is a BindingOrAssignmentPattern
+     */
+    function isBindingOrAssignmentPattern(node: BindingOrAssignmentElementTarget): node is BindingOrAssignmentPattern;
+    /**
+     * Determines whether a node is an ObjectBindingOrAssignmentPattern
+     */
+    function isObjectBindingOrAssignmentPattern(node: BindingOrAssignmentElementTarget): node is ObjectBindingOrAssignmentPattern;
+    /**
+     * Determines whether a node is an ArrayBindingOrAssignmentPattern
+     */
+    function isArrayBindingOrAssignmentPattern(node: BindingOrAssignmentElementTarget): node is ArrayBindingOrAssignmentPattern;
+    function isPropertyAccessOrQualifiedName(node: Node): node is PropertyAccessExpression | QualifiedName;
+    function isCallLikeExpression(node: Node): node is CallLikeExpression;
+    function isCallOrNewExpression(node: Node): node is CallExpression | NewExpression;
+    function isTemplateLiteral(node: Node): node is TemplateLiteral;
     function isLeftHandSideExpression(node: Node): node is LeftHandSideExpression;
     function isUnaryExpression(node: Node): node is UnaryExpression;
     function isExpression(node: Node): node is Expression;
@@ -3339,24 +4660,17 @@ declare namespace ts {
     function isPartiallyEmittedExpression(node: Node): node is PartiallyEmittedExpression;
     function isNotEmittedStatement(node: Node): node is NotEmittedStatement;
     function isNotEmittedOrPartiallyEmittedNode(node: Node): node is NotEmittedStatement | PartiallyEmittedExpression;
-    function isOmittedExpression(node: Node): node is OmittedExpression;
-    function isTemplateSpan(node: Node): node is TemplateSpan;
-    function isBlock(node: Node): node is Block;
+    function isIterationStatement(node: Node, lookInLabeledStatements: boolean): node is IterationStatement;
+    function isForInOrOfStatement(node: Node): node is ForInOrOfStatement;
     function isConciseBody(node: Node): node is ConciseBody;
     function isFunctionBody(node: Node): node is FunctionBody;
     function isForInitializer(node: Node): node is ForInitializer;
-    function isVariableDeclaration(node: Node): node is VariableDeclaration;
-    function isVariableDeclarationList(node: Node): node is VariableDeclarationList;
-    function isCaseBlock(node: Node): node is CaseBlock;
     function isModuleBody(node: Node): node is ModuleBody;
-    function isImportEqualsDeclaration(node: Node): node is ImportEqualsDeclaration;
-    function isImportClause(node: Node): node is ImportClause;
+    function isNamespaceBody(node: Node): node is NamespaceBody;
+    function isJSDocNamespaceBody(node: Node): node is JSDocNamespaceBody;
     function isNamedImportBindings(node: Node): node is NamedImportBindings;
-    function isImportSpecifier(node: Node): node is ImportSpecifier;
-    function isNamedExports(node: Node): node is NamedExports;
-    function isExportSpecifier(node: Node): node is ExportSpecifier;
     function isModuleOrEnumDeclaration(node: Node): node is ModuleDeclaration | EnumDeclaration;
-    function isDeclaration(node: Node): node is Declaration;
+    function isDeclaration(node: Node): node is NamedDeclaration;
     function isDeclarationStatement(node: Node): node is DeclarationStatement;
     /**
      * Determines whether the node is a statement that is not also a declaration
@@ -3364,58 +4678,20 @@ declare namespace ts {
     function isStatementButNotDeclaration(node: Node): node is Statement;
     function isStatement(node: Node): node is Statement;
     function isModuleReference(node: Node): node is ModuleReference;
-    function isJsxOpeningElement(node: Node): node is JsxOpeningElement;
-    function isJsxClosingElement(node: Node): node is JsxClosingElement;
     function isJsxTagNameExpression(node: Node): node is JsxTagNameExpression;
     function isJsxChild(node: Node): node is JsxChild;
     function isJsxAttributeLike(node: Node): node is JsxAttributeLike;
-    function isJsxSpreadAttribute(node: Node): node is JsxSpreadAttribute;
-    function isJsxAttribute(node: Node): node is JsxAttribute;
     function isStringLiteralOrJsxExpression(node: Node): node is StringLiteral | JsxExpression;
+    function isJsxOpeningLikeElement(node: Node): node is JsxOpeningLikeElement;
     function isCaseOrDefaultClause(node: Node): node is CaseOrDefaultClause;
-    function isHeritageClause(node: Node): node is HeritageClause;
-    function isCatchClause(node: Node): node is CatchClause;
-    function isPropertyAssignment(node: Node): node is PropertyAssignment;
-    function isShorthandPropertyAssignment(node: Node): node is ShorthandPropertyAssignment;
-    function isEnumMember(node: Node): node is EnumMember;
-    function isSourceFile(node: Node): node is SourceFile;
-    function isWatchSet(options: CompilerOptions): boolean;
-}
-declare namespace ts {
-    function getDefaultLibFileName(options: CompilerOptions): string;
-    function textSpanEnd(span: TextSpan): number;
-    function textSpanIsEmpty(span: TextSpan): boolean;
-    function textSpanContainsPosition(span: TextSpan, position: number): boolean;
-    function textSpanContainsTextSpan(span: TextSpan, other: TextSpan): boolean;
-    function textSpanOverlapsWith(span: TextSpan, other: TextSpan): boolean;
-    function textSpanOverlap(span1: TextSpan, span2: TextSpan): TextSpan;
-    function textSpanIntersectsWithTextSpan(span: TextSpan, other: TextSpan): boolean;
-    function textSpanIntersectsWith(span: TextSpan, start: number, length: number): boolean;
-    function decodedTextSpanIntersectsWith(start1: number, length1: number, start2: number, length2: number): boolean;
-    function textSpanIntersectsWithPosition(span: TextSpan, position: number): boolean;
-    function textSpanIntersection(span1: TextSpan, span2: TextSpan): TextSpan;
-    function createTextSpan(start: number, length: number): TextSpan;
-    function createTextSpanFromBounds(start: number, end: number): TextSpan;
-    function textChangeRangeNewSpan(range: TextChangeRange): TextSpan;
-    function textChangeRangeIsUnchanged(range: TextChangeRange): boolean;
-    function createTextChangeRange(span: TextSpan, newLength: number): TextChangeRange;
-    let unchangedTextChangeRange: TextChangeRange;
-    /**
-     * Called to merge all the changes that occurred across several versions of a script snapshot
-     * into a single change.  i.e. if a user keeps making successive edits to a script we will
-     * have a text change from V1 to V2, V2 to V3, ..., Vn.
-     *
-     * This function will then merge those changes into a single change range valid between V1 and
-     * Vn.
-     */
-    function collapseTextChangeRangesAcrossMultipleVersions(changes: TextChangeRange[]): TextChangeRange;
-    function getTypeParameterOwner(d: Declaration): Declaration;
-    function isParameterPropertyDeclaration(node: ParameterDeclaration): boolean;
-    function getCombinedModifierFlags(node: Node): ModifierFlags;
-    function getCombinedNodeFlags(node: Node): NodeFlags;
+    /** True if node is of some JSDoc syntax kind. */
+    function isJSDocNode(node: Node): boolean;
+    /** True if node is of a kind that may contain comment text. */
+    function isJSDocCommentContainingNode(node: Node): boolean;
+    function isJSDocTag(node: Node): boolean;
 }
 declare namespace ts {
-    var Diagnostics: {
+    const Diagnostics: {
         Unterminated_string_literal: {
             code: number;
             category: DiagnosticCategory;
@@ -3662,7 +4938,7 @@ declare namespace ts {
             key: string;
             message: string;
         };
-        Type_0_is_not_a_valid_async_function_return_type: {
+        Type_0_is_not_a_valid_async_function_return_type_in_ES5_SlashES3_because_it_does_not_refer_to_a_Promise_compatible_constructor_value: {
             code: number;
             category: DiagnosticCategory;
             key: string;
@@ -3680,19 +4956,19 @@ declare namespace ts {
             key: string;
             message: string;
         };
-        Operand_for_await_does_not_have_a_valid_callable_then_member: {
+        The_return_type_of_an_async_function_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Return_expression_in_async_function_does_not_have_a_valid_callable_then_member: {
+        A_promise_must_have_a_then_method: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Expression_body_for_async_arrow_function_does_not_have_a_valid_callable_then_member: {
+        The_first_parameter_of_the_then_method_of_a_promise_must_be_a_callback: {
             code: number;
             category: DiagnosticCategory;
             key: string;
@@ -3704,7 +4980,7 @@ declare namespace ts {
             key: string;
             message: string;
         };
-        _0_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method: {
+        Type_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method: {
             code: number;
             category: DiagnosticCategory;
             key: string;
@@ -3758,7 +5034,7 @@ declare namespace ts {
             key: string;
             message: string;
         };
-        Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher: {
+        Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher_Use_the_syntax_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
@@ -3854,6 +5130,12 @@ declare namespace ts {
             key: string;
             message: string;
         };
+        A_for_await_of_statement_is_only_allowed_within_an_async_function_or_async_generator: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
         A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement: {
             code: number;
             category: DiagnosticCategory;
@@ -4322,12 +5604,6 @@ declare namespace ts {
             key: string;
             message: string;
         };
-        Catch_clause_variable_name_must_be_an_identifier: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
         Catch_clause_variable_cannot_have_a_type_annotation: {
             code: number;
             category: DiagnosticCategory;
@@ -4370,6 +5646,12 @@ declare namespace ts {
             key: string;
             message: string;
         };
+        Cannot_re_export_a_type_when_the_isolatedModules_flag_is_provided: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
         Decorators_are_not_valid_here: {
             code: number;
             category: DiagnosticCategory;
@@ -4430,6 +5712,12 @@ declare namespace ts {
             key: string;
             message: string;
         };
+        Identifier_expected_esModule_is_reserved_as_an_exported_marker_when_transforming_ECMAScript_modules: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
         Export_assignment_is_not_supported_when_module_flag_is_system: {
             code: number;
             category: DiagnosticCategory;
@@ -4700,97 +5988,163 @@ declare namespace ts {
             key: string;
             message: string;
         };
-        Duplicate_identifier_0: {
+        An_abstract_accessor_cannot_have_an_implementation: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor: {
+        A_default_export_can_only_be_used_in_an_ECMAScript_style_module: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Static_members_cannot_reference_class_type_parameters: {
+        Type_of_await_operand_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Circular_definition_of_import_alias_0: {
+        Type_of_yield_operand_in_an_async_generator_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Cannot_find_name_0: {
+        Type_of_iterated_elements_of_a_yield_Asterisk_operand_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Module_0_has_no_exported_member_1: {
+        Dynamic_import_cannot_be_used_when_targeting_ECMAScript_2015_modules: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        File_0_is_not_a_module: {
+        Dynamic_import_must_have_one_specifier_as_an_argument: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Cannot_find_module_0: {
+        Specifier_of_dynamic_import_cannot_be_spread_element: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambiguity: {
+        Dynamic_import_cannot_have_type_arguments: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements: {
+        String_literal_with_double_quotes_expected: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Type_0_recursively_references_itself_as_a_base_type: {
+        Property_value_can_only_be_string_literal_numeric_literal_true_false_null_object_literal_or_array_literal: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        A_class_may_only_extend_another_class: {
+        Duplicate_identifier_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        An_interface_may_only_extend_a_class_or_another_interface: {
+        Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Type_parameter_0_has_a_circular_constraint: {
+        Static_members_cannot_reference_class_type_parameters: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Generic_type_0_requires_1_type_argument_s: {
+        Circular_definition_of_import_alias_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Type_0_is_not_generic: {
+        Cannot_find_name_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Module_0_has_no_exported_member_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        File_0_is_not_a_module: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Cannot_find_module_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambiguity: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Type_0_recursively_references_itself_as_a_base_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_class_may_only_extend_another_class: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        An_interface_may_only_extend_a_class_or_another_interface: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Type_parameter_0_has_a_circular_constraint: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Generic_type_0_requires_1_type_argument_s: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Type_0_is_not_generic: {
             code: number;
             category: DiagnosticCategory;
             key: string;
@@ -4958,6 +6312,12 @@ declare namespace ts {
             key: string;
             message: string;
         };
+        This_syntax_requires_an_imported_helper_named_1_but_module_0_has_no_exported_member_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
         Type_0_does_not_satisfy_the_constraint_1: {
             code: number;
             category: DiagnosticCategory;
@@ -4970,7 +6330,7 @@ declare namespace ts {
             key: string;
             message: string;
         };
-        Supplied_parameters_do_not_match_any_signature_of_call_target: {
+        Call_target_does_not_contain_any_signatures: {
             code: number;
             category: DiagnosticCategory;
             key: string;
@@ -5018,6 +6378,12 @@ declare namespace ts {
             key: string;
             message: string;
         };
+        This_syntax_requires_an_imported_helper_but_module_0_cannot_be_found: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
         A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value: {
             code: number;
             category: DiagnosticCategory;
@@ -5030,7 +6396,7 @@ declare namespace ts {
             key: string;
             message: string;
         };
-        The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer: {
+        The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_or_a_property_access: {
             code: number;
             category: DiagnosticCategory;
             key: string;
@@ -5072,7 +6438,7 @@ declare namespace ts {
             key: string;
             message: string;
         };
-        Invalid_left_hand_side_of_assignment_expression: {
+        The_left_hand_side_of_an_assignment_expression_must_be_a_variable_or_a_property_access: {
             code: number;
             category: DiagnosticCategory;
             key: string;
@@ -5312,7 +6678,7 @@ declare namespace ts {
             key: string;
             message: string;
         };
-        Invalid_left_hand_side_in_for_in_statement: {
+        The_left_hand_side_of_a_for_in_statement_must_be_a_variable_or_a_property_access: {
             code: number;
             category: DiagnosticCategory;
             key: string;
@@ -5540,13 +6906,13 @@ declare namespace ts {
             key: string;
             message: string;
         };
-        The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property: {
+        Class_0_used_before_its_declaration: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property: {
+        Enum_0_used_before_its_declaration: {
             code: number;
             category: DiagnosticCategory;
             key: string;
@@ -5618,7 +6984,7 @@ declare namespace ts {
             key: string;
             message: string;
         };
-        A_rest_element_must_be_last_in_an_array_destructuring_pattern: {
+        A_rest_element_must_be_last_in_a_destructuring_pattern: {
             code: number;
             category: DiagnosticCategory;
             key: string;
@@ -5750,19 +7116,7 @@ declare namespace ts {
             key: string;
             message: string;
         };
-        The_left_hand_side_of_a_for_of_statement_cannot_be_a_constant_or_a_read_only_property: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        The_left_hand_side_of_a_for_in_statement_cannot_be_a_constant_or_a_read_only_property: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Invalid_left_hand_side_in_for_of_statement: {
+        The_left_hand_side_of_a_for_of_statement_must_be_a_variable_or_a_property_access: {
             code: number;
             category: DiagnosticCategory;
             key: string;
@@ -5864,6 +7218,12 @@ declare namespace ts {
             key: string;
             message: string;
         };
+        Type_must_have_a_Symbol_asyncIterator_method_that_returns_an_async_iterator: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
         A_generator_cannot_have_a_void_type_annotation: {
             code: number;
             category: DiagnosticCategory;
@@ -5948,6 +7308,12 @@ declare namespace ts {
             key: string;
             message: string;
         };
+        An_async_iterator_must_have_a_next_method: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
         Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions: {
             code: number;
             category: DiagnosticCategory;
@@ -6044,2300 +7410,3475 @@ declare namespace ts {
             key: string;
             message: string;
         };
-        JSX_element_attributes_type_0_may_not_be_a_union_type: {
+        Type_0_cannot_be_used_to_index_type_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        The_return_type_of_a_JSX_element_constructor_must_return_an_object_type: {
+        Type_0_has_no_matching_index_signature_for_type_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist: {
+        Type_0_cannot_be_used_as_an_index_type: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Property_0_in_type_1_is_not_assignable_to_type_2: {
+        Cannot_assign_to_0_because_it_is_not_a_variable: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        JSX_element_type_0_does_not_have_any_construct_or_call_signatures: {
+        Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements: {
+        The_target_of_an_assignment_must_be_a_variable_or_a_property_access: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property: {
+        Index_signature_in_type_0_only_permits_reading: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property: {
+        Duplicate_identifier_newTarget_Compiler_uses_variable_declaration_newTarget_to_capture_new_target_meta_property_reference: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        The_global_type_JSX_0_may_not_have_more_than_one_property: {
+        Expression_resolves_to_variable_declaration_newTarget_that_compiler_uses_to_capture_new_target_meta_property_reference: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Cannot_emit_namespaced_JSX_elements_in_React: {
+        A_mixin_class_must_have_a_constructor_with_a_single_rest_parameter_of_type_any: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums: {
+        Property_0_has_conflicting_declarations_and_is_inaccessible_in_type_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead: {
+        The_type_returned_by_the_next_method_of_an_async_iterator_must_be_a_promise_for_a_type_with_a_value_property: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1: {
+        Type_0_is_not_an_array_type_or_does_not_have_a_Symbol_iterator_method_that_returns_an_iterator: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Exported_external_package_typings_file_cannot_contain_tripleslash_references_Please_contact_the_package_author_to_update_the_package_definition: {
+        Type_0_is_not_an_array_type_or_a_string_type_or_does_not_have_a_Symbol_iterator_method_that_returns_an_iterator: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Exported_external_package_typings_file_0_is_not_a_module_Please_contact_the_package_author_to_update_the_package_definition: {
+        Generic_type_instantiation_is_excessively_deep_and_possibly_infinite: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        JSX_expressions_must_have_one_parent_element: {
+        Property_0_does_not_exist_on_type_1_Did_you_mean_2: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Type_0_provides_no_match_for_the_signature_1: {
+        Cannot_find_name_0_Did_you_mean_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_higher: {
+        Computed_values_are_not_permitted_in_an_enum_with_string_valued_members: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions: {
+        Expected_0_arguments_but_got_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module: {
+        Expected_at_least_0_arguments_but_got_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Cannot_find_name_0_Did_you_mean_the_static_member_1_0: {
+        Expected_0_arguments_but_got_a_minimum_of_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Cannot_find_name_0_Did_you_mean_the_instance_member_this_0: {
+        Expected_at_least_0_arguments_but_got_a_minimum_of_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Invalid_module_name_in_augmentation_module_0_cannot_be_found: {
+        Expected_0_type_arguments_but_got_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Exports_and_export_assignments_are_not_permitted_in_module_augmentations: {
+        Type_0_has_no_properties_in_common_with_type_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_module: {
+        JSX_element_attributes_type_0_may_not_be_a_union_type: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always_visible: {
+        The_return_type_of_a_JSX_element_constructor_must_return_an_object_type: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations: {
+        JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambient_context: {
+        Property_0_in_type_1_is_not_assignable_to_type_2: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity: {
+        JSX_element_type_0_does_not_have_any_construct_or_call_signatures: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Cannot_assign_a_0_constructor_type_to_a_1_constructor_type: {
+        JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration: {
+        Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration: {
+        JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Cannot_extend_a_class_0_Class_constructor_is_marked_as_private: {
+        The_global_type_JSX_0_may_not_have_more_than_one_property: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Accessors_must_both_be_abstract_or_non_abstract: {
+        JSX_spread_child_must_be_an_array_type: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type: {
+        Cannot_augment_module_0_with_value_exports_because_it_resolves_to_a_non_module_entity: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Type_0_is_not_comparable_to_type_1: {
+        A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        A_function_that_is_called_with_the_new_keyword_cannot_have_a_this_type_that_is_void: {
+        Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        A_this_parameter_must_be_the_first_parameter: {
+        Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        A_constructor_cannot_have_a_this_parameter: {
+        Exported_external_package_typings_file_cannot_contain_tripleslash_references_Please_contact_the_package_author_to_update_the_package_definition: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        get_and_set_accessor_must_have_the_same_this_type: {
+        Exported_external_package_typings_file_0_is_not_a_module_Please_contact_the_package_author_to_update_the_package_definition: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation: {
+        JSX_expressions_must_have_one_parent_element: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1: {
+        Type_0_provides_no_match_for_the_signature_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        The_this_types_of_each_signature_are_incompatible: {
+        super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_higher: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Identifier_0_must_be_imported_from_a_module: {
+        super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        All_declarations_of_0_must_have_identical_modifiers: {
+        Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Cannot_find_type_definition_file_for_0: {
+        Cannot_find_name_0_Did_you_mean_the_static_member_1_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Cannot_extend_an_interface_0_Did_you_mean_implements: {
+        Cannot_find_name_0_Did_you_mean_the_instance_member_this_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        A_class_must_be_declared_after_its_base_class: {
+        Invalid_module_name_in_augmentation_module_0_cannot_be_found: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        An_import_path_cannot_end_with_a_0_extension_Consider_importing_1_instead: {
+        Invalid_module_name_in_augmentation_Module_0_resolves_to_an_untyped_module_at_1_which_cannot_be_augmented: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        _0_is_a_primitive_but_1_is_a_wrapper_object_Prefer_using_0_when_possible: {
+        Exports_and_export_assignments_are_not_permitted_in_module_augmentations: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        _0_only_refers_to_a_type_but_is_being_used_as_a_value_here: {
+        Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_module: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Namespace_0_has_no_exported_member_1: {
+        export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always_visible: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Left_side_of_comma_operator_is_unused_and_has_no_side_effects: {
+        Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        The_Object_type_is_assignable_to_very_few_other_types_Did_you_mean_to_use_the_any_type_instead: {
+        Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambient_context: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Import_declaration_0_is_using_private_name_1: {
+        Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Type_parameter_0_of_exported_class_has_or_is_using_private_name_1: {
+        Cannot_assign_a_0_constructor_type_to_a_1_constructor_type: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1: {
+        Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Type_parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1: {
+        Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Type_parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1: {
+        Cannot_extend_a_class_0_Class_constructor_is_marked_as_private: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Type_parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1: {
+        Accessors_must_both_be_abstract_or_non_abstract: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Type_parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1: {
+        A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1: {
+        Type_0_is_not_comparable_to_type_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Type_parameter_0_of_exported_function_has_or_is_using_private_name_1: {
+        A_function_that_is_called_with_the_new_keyword_cannot_have_a_this_type_that_is_void: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Implements_clause_of_exported_class_0_has_or_is_using_private_name_1: {
+        A_this_parameter_must_be_the_first_parameter: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Extends_clause_of_exported_class_0_has_or_is_using_private_name_1: {
+        A_constructor_cannot_have_a_this_parameter: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Extends_clause_of_exported_interface_0_has_or_is_using_private_name_1: {
+        get_and_set_accessor_must_have_the_same_this_type: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: {
+        this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Exported_variable_0_has_or_is_using_name_1_from_private_module_2: {
+        The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Exported_variable_0_has_or_is_using_private_name_1: {
+        The_this_types_of_each_signature_are_incompatible: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: {
+        _0_refers_to_a_UMD_global_but_the_current_file_is_a_module_Consider_adding_an_import_instead: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2: {
+        All_declarations_of_0_must_have_identical_modifiers: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Public_static_property_0_of_exported_class_has_or_is_using_private_name_1: {
+        Cannot_find_type_definition_file_for_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: {
+        Cannot_extend_an_interface_0_Did_you_mean_implements: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Public_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2: {
+        An_import_path_cannot_end_with_a_0_extension_Consider_importing_1_instead: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Public_property_0_of_exported_class_has_or_is_using_private_name_1: {
+        _0_is_a_primitive_but_1_is_a_wrapper_object_Prefer_using_0_when_possible: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Property_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2: {
+        _0_only_refers_to_a_type_but_is_being_used_as_a_value_here: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Property_0_of_exported_interface_has_or_is_using_private_name_1: {
+        Namespace_0_has_no_exported_member_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2: {
+        Left_side_of_comma_operator_is_unused_and_has_no_side_effects: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_private_name_1: {
+        The_Object_type_is_assignable_to_very_few_other_types_Did_you_mean_to_use_the_any_type_instead: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2: {
+        An_async_function_or_method_must_return_a_Promise_Make_sure_you_have_a_declaration_for_Promise_or_include_ES2015_in_your_lib_option: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_private_name_1: {
+        Spread_types_may_only_be_created_from_object_types: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: {
+        Static_property_0_conflicts_with_built_in_property_Function_0_of_constructor_function_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1: {
+        Rest_types_may_only_be_created_from_object_types: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_private_name_0: {
+        The_target_of_an_object_rest_assignment_must_be_a_variable_or_a_property_access: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: {
+        _0_only_refers_to_a_type_but_is_being_used_as_a_namespace_here: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1: {
+        The_operand_of_a_delete_operator_must_be_a_property_reference: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Return_type_of_public_property_getter_from_exported_class_has_or_is_using_private_name_0: {
+        The_operand_of_a_delete_operator_cannot_be_a_read_only_property: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: {
+        An_async_function_or_method_in_ES5_SlashES3_requires_the_Promise_constructor_Make_sure_you_have_a_declaration_for_the_Promise_constructor_or_include_ES2015_in_your_lib_option: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_0: {
+        Required_type_parameters_may_not_follow_optional_type_parameters: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Return_type_of_call_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: {
+        Generic_type_0_requires_between_1_and_2_type_arguments: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Return_type_of_call_signature_from_exported_interface_has_or_is_using_private_name_0: {
+        Cannot_use_namespace_0_as_a_value: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Return_type_of_index_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: {
+        Cannot_use_namespace_0_as_a_type: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Return_type_of_index_signature_from_exported_interface_has_or_is_using_private_name_0: {
+        _0_are_specified_twice_The_attribute_named_0_will_be_overwritten: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: {
+        A_dynamic_import_call_returns_a_Promise_Make_sure_you_have_a_declaration_for_Promise_or_include_ES2015_in_your_lib_option: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_private_module_1: {
+        A_dynamic_import_call_in_ES5_SlashES3_requires_the_Promise_constructor_Make_sure_you_have_a_declaration_for_the_Promise_constructor_or_include_ES2015_in_your_lib_option: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Return_type_of_public_static_method_from_exported_class_has_or_is_using_private_name_0: {
+        Import_declaration_0_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: {
+        Type_parameter_0_of_exported_class_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_private_module_1: {
+        Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Return_type_of_public_method_from_exported_class_has_or_is_using_private_name_0: {
+        Type_parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Return_type_of_method_from_exported_interface_has_or_is_using_name_0_from_private_module_1: {
+        Type_parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Return_type_of_method_from_exported_interface_has_or_is_using_private_name_0: {
+        Type_parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Return_type_of_exported_function_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: {
+        Type_parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Return_type_of_exported_function_has_or_is_using_name_0_from_private_module_1: {
+        Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Return_type_of_exported_function_has_or_is_using_private_name_0: {
+        Type_parameter_0_of_exported_function_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: {
+        Implements_clause_of_exported_class_0_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_private_module_2: {
+        extends_clause_of_exported_class_0_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Parameter_0_of_constructor_from_exported_class_has_or_is_using_private_name_1: {
+        extends_clause_of_exported_interface_0_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2: {
+        Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1: {
+        Exported_variable_0_has_or_is_using_name_1_from_private_module_2: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2: {
+        Exported_variable_0_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1: {
+        Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: {
+        Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_private_module_2: {
+        Public_static_property_0_of_exported_class_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1: {
+        Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: {
+        Public_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_private_module_2: {
+        Public_property_0_of_exported_class_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1: {
+        Property_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Parameter_0_of_method_from_exported_interface_has_or_is_using_name_1_from_private_module_2: {
+        Property_0_of_exported_interface_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1: {
+        Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Parameter_0_of_exported_function_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: {
+        Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Parameter_0_of_exported_function_has_or_is_using_name_1_from_private_module_2: {
+        Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Parameter_0_of_exported_function_has_or_is_using_private_name_1: {
+        Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Exported_type_alias_0_has_or_is_using_private_name_1: {
+        Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Default_export_of_the_module_has_or_is_using_private_name_0: {
+        Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Conflicting_definitions_for_0_found_at_1_and_2_Consider_installing_a_specific_version_of_this_library_to_resolve_the_conflict: {
+        Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_private_name_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        The_current_host_does_not_support_the_0_option: {
+        Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Cannot_find_the_common_subdirectory_path_for_the_input_files: {
+        Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        File_specification_cannot_end_in_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0: {
+        Return_type_of_public_property_getter_from_exported_class_has_or_is_using_private_name_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        File_specification_cannot_contain_multiple_recursive_directory_wildcards_Asterisk_Asterisk_Colon_0: {
+        Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Cannot_read_file_0_Colon_1: {
+        Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Unsupported_file_encoding: {
+        Return_type_of_call_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Failed_to_parse_file_0_Colon_1: {
+        Return_type_of_call_signature_from_exported_interface_has_or_is_using_private_name_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Unknown_compiler_option_0: {
+        Return_type_of_index_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Compiler_option_0_requires_a_value_of_type_1: {
+        Return_type_of_index_signature_from_exported_interface_has_or_is_using_private_name_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Could_not_write_file_0_Colon_1: {
+        Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Option_project_cannot_be_mixed_with_source_files_on_a_command_line: {
+        Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_private_module_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES2015_or_higher: {
+        Return_type_of_public_static_method_from_exported_class_has_or_is_using_private_name_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided: {
+        Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Option_0_cannot_be_specified_without_specifying_option_1: {
+        Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_private_module_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Option_0_cannot_be_specified_with_option_1: {
+        Return_type_of_public_method_from_exported_class_has_or_is_using_private_name_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        A_tsconfig_json_file_is_already_defined_at_Colon_0: {
+        Return_type_of_method_from_exported_interface_has_or_is_using_name_0_from_private_module_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Cannot_write_file_0_because_it_would_overwrite_input_file: {
+        Return_type_of_method_from_exported_interface_has_or_is_using_private_name_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files: {
+        Return_type_of_exported_function_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Cannot_find_a_tsconfig_json_file_at_the_specified_directory_Colon_0: {
+        Return_type_of_exported_function_has_or_is_using_name_0_from_private_module_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        The_specified_path_does_not_exist_Colon_0: {
+        Return_type_of_exported_function_has_or_is_using_private_name_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier: {
+        Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Option_paths_cannot_be_used_without_specifying_baseUrl_option: {
+        Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_private_module_2: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Pattern_0_can_have_at_most_one_Asterisk_character: {
+        Parameter_0_of_constructor_from_exported_class_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character: {
+        Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Substitutions_for_pattern_0_should_be_an_array: {
+        Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2: {
+        Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        File_specification_cannot_contain_a_parent_directory_that_appears_after_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0: {
+        Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Substitutions_for_pattern_0_shouldn_t_be_an_empty_array: {
+        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Concatenate_and_emit_output_to_single_file: {
+        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_private_module_2: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Generates_corresponding_d_ts_file: {
+        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations: {
+        Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Specify_the_location_where_debugger_should_locate_TypeScript_files_instead_of_source_locations: {
+        Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_private_module_2: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Watch_input_files: {
+        Parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Redirect_output_structure_to_the_directory: {
+        Parameter_0_of_method_from_exported_interface_has_or_is_using_name_1_from_private_module_2: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Do_not_erase_const_enum_declarations_in_generated_code: {
+        Parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Do_not_emit_outputs_if_any_errors_were_reported: {
+        Parameter_0_of_exported_function_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Do_not_emit_comments_to_output: {
+        Parameter_0_of_exported_function_has_or_is_using_name_1_from_private_module_2: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Do_not_emit_outputs: {
+        Parameter_0_of_exported_function_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typechecking: {
+        Exported_type_alias_0_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Skip_type_checking_of_declaration_files: {
+        Default_export_of_the_module_has_or_is_using_private_name_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015: {
+        Type_parameter_0_of_exported_type_alias_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015: {
+        Conflicting_definitions_for_0_found_at_1_and_2_Consider_installing_a_specific_version_of_this_library_to_resolve_the_conflict: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Print_this_message: {
+        Parameter_0_of_index_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Print_the_compiler_s_version: {
+        Parameter_0_of_index_signature_from_exported_interface_has_or_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Compile_the_project_in_the_given_directory: {
+        Property_0_of_exported_class_expression_may_not_be_private_or_protected: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Syntax_Colon_0: {
+        The_current_host_does_not_support_the_0_option: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        options: {
+        Cannot_find_the_common_subdirectory_path_for_the_input_files: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        file: {
+        File_specification_cannot_end_in_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Examples_Colon_0: {
+        File_specification_cannot_contain_multiple_recursive_directory_wildcards_Asterisk_Asterisk_Colon_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Options_Colon: {
+        Cannot_read_file_0_Colon_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Version_0: {
+        Failed_to_parse_file_0_Colon_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Insert_command_line_options_and_files_from_a_file: {
+        Unknown_compiler_option_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        File_change_detected_Starting_incremental_compilation: {
+        Compiler_option_0_requires_a_value_of_type_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        KIND: {
+        Could_not_write_file_0_Colon_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        FILE: {
+        Option_project_cannot_be_mixed_with_source_files_on_a_command_line: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        VERSION: {
+        Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES2015_or_higher: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        LOCATION: {
+        Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        DIRECTORY: {
+        Option_0_cannot_be_specified_without_specifying_option_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        STRATEGY: {
+        Option_0_cannot_be_specified_with_option_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Compilation_complete_Watching_for_file_changes: {
+        A_tsconfig_json_file_is_already_defined_at_Colon_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Generates_corresponding_map_file: {
+        Cannot_write_file_0_because_it_would_overwrite_input_file: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Compiler_option_0_expects_an_argument: {
+        Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Unterminated_quoted_string_in_response_file_0: {
+        Cannot_find_a_tsconfig_json_file_at_the_specified_directory_Colon_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Argument_for_0_option_must_be_Colon_1: {
+        The_specified_path_does_not_exist_Colon_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Locale_must_be_of_the_form_language_or_language_territory_For_example_0_or_1: {
+        Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Unsupported_locale_0: {
+        Option_paths_cannot_be_used_without_specifying_baseUrl_option: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Unable_to_open_file_0: {
+        Pattern_0_can_have_at_most_one_Asterisk_character: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Corrupted_locale_file_0: {
+        Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Raise_error_on_expressions_and_declarations_with_an_implied_any_type: {
+        Substitutions_for_pattern_0_should_be_an_array: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        File_0_not_found: {
+        Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        File_0_has_unsupported_extension_The_only_supported_extensions_are_1: {
+        File_specification_cannot_contain_a_parent_directory_that_appears_after_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Suppress_noImplicitAny_errors_for_indexing_objects_lacking_index_signatures: {
+        Substitutions_for_pattern_0_shouldn_t_be_an_empty_array: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Do_not_emit_declarations_for_code_that_has_an_internal_annotation: {
+        Invalid_value_for_jsxFactory_0_is_not_a_valid_identifier_or_qualified_name: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Specify_the_root_directory_of_input_files_Use_to_control_the_output_directory_structure_with_outDir: {
+        Concatenate_and_emit_output_to_single_file: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        File_0_is_not_under_rootDir_1_rootDir_is_expected_to_contain_all_source_files: {
+        Generates_corresponding_d_ts_file: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Specify_the_end_of_line_sequence_to_be_used_when_emitting_files_Colon_CRLF_dos_or_LF_unix: {
+        Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        NEWLINE: {
+        Specify_the_location_where_debugger_should_locate_TypeScript_files_instead_of_source_locations: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Option_0_can_only_be_specified_in_tsconfig_json_file: {
+        Watch_input_files: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Enables_experimental_support_for_ES7_decorators: {
+        Redirect_output_structure_to_the_directory: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Enables_experimental_support_for_emitting_type_metadata_for_decorators: {
+        Do_not_erase_const_enum_declarations_in_generated_code: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Enables_experimental_support_for_ES7_async_functions: {
+        Do_not_emit_outputs_if_any_errors_were_reported: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Specify_module_resolution_strategy_Colon_node_Node_js_or_classic_TypeScript_pre_1_6: {
+        Do_not_emit_comments_to_output: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file: {
+        Do_not_emit_outputs: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Successfully_created_a_tsconfig_json_file: {
+        Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typechecking: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Suppress_excess_property_checks_for_object_literals: {
+        Skip_type_checking_of_declaration_files: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Stylize_errors_and_messages_using_color_and_context_experimental: {
+        Specify_ECMAScript_target_version_Colon_ES3_default_ES5_ES2015_ES2016_ES2017_or_ESNEXT: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Do_not_report_errors_on_unused_labels: {
+        Specify_module_code_generation_Colon_commonjs_amd_system_umd_es2015_or_ESNext: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Report_error_when_not_all_code_paths_in_function_return_a_value: {
+        Print_this_message: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Report_errors_for_fallthrough_cases_in_switch_statement: {
+        Print_the_compiler_s_version: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Do_not_report_errors_on_unreachable_code: {
+        Compile_the_project_given_the_path_to_its_configuration_file_or_to_a_folder_with_a_tsconfig_json: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Disallow_inconsistently_cased_references_to_the_same_file: {
+        Syntax_Colon_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Specify_library_files_to_be_included_in_the_compilation_Colon: {
+        options: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Specify_JSX_code_generation_Colon_preserve_or_react: {
+        file: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Only_amd_and_system_modules_are_supported_alongside_0: {
+        Examples_Colon_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Base_directory_to_resolve_non_absolute_module_names: {
+        Options_Colon: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Specify_the_object_invoked_for_createElement_and_spread_when_targeting_react_JSX_emit: {
+        Version_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Enable_tracing_of_the_name_resolution_process: {
+        Insert_command_line_options_and_files_from_a_file: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Resolving_module_0_from_1: {
+        File_change_detected_Starting_incremental_compilation: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Explicitly_specified_module_resolution_kind_Colon_0: {
+        KIND: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Module_resolution_kind_is_not_specified_using_0: {
+        FILE: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Module_name_0_was_successfully_resolved_to_1: {
+        VERSION: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Module_name_0_was_not_resolved: {
+        LOCATION: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        paths_option_is_specified_looking_for_a_pattern_to_match_module_name_0: {
+        DIRECTORY: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Module_name_0_matched_pattern_1: {
+        STRATEGY: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Trying_substitution_0_candidate_module_location_Colon_1: {
+        FILE_OR_DIRECTORY: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Resolving_module_name_0_relative_to_base_url_1_2: {
+        Compilation_complete_Watching_for_file_changes: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Loading_module_as_file_Slash_folder_candidate_module_location_0: {
+        Generates_corresponding_map_file: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        File_0_does_not_exist: {
+        Compiler_option_0_expects_an_argument: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        File_0_exist_use_it_as_a_name_resolution_result: {
+        Unterminated_quoted_string_in_response_file_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Loading_module_0_from_node_modules_folder: {
+        Argument_for_0_option_must_be_Colon_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Found_package_json_at_0: {
+        Locale_must_be_of_the_form_language_or_language_territory_For_example_0_or_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        package_json_does_not_have_types_field: {
+        Unsupported_locale_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        package_json_has_0_field_1_that_references_2: {
+        Unable_to_open_file_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Allow_javascript_files_to_be_compiled: {
+        Corrupted_locale_file_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Option_0_should_have_array_of_strings_as_a_value: {
+        Raise_error_on_expressions_and_declarations_with_an_implied_any_type: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Checking_if_0_is_the_longest_matching_prefix_for_1_2: {
+        File_0_not_found: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Expected_type_of_0_field_in_package_json_to_be_string_got_1: {
+        File_0_has_unsupported_extension_The_only_supported_extensions_are_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1: {
+        Suppress_noImplicitAny_errors_for_indexing_objects_lacking_index_signatures: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0: {
+        Do_not_emit_declarations_for_code_that_has_an_internal_annotation: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Longest_matching_prefix_for_0_is_1: {
+        Specify_the_root_directory_of_input_files_Use_to_control_the_output_directory_structure_with_outDir: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Loading_0_from_the_root_dir_1_candidate_location_2: {
+        File_0_is_not_under_rootDir_1_rootDir_is_expected_to_contain_all_source_files: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Trying_other_entries_in_rootDirs: {
+        Specify_the_end_of_line_sequence_to_be_used_when_emitting_files_Colon_CRLF_dos_or_LF_unix: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Module_resolution_using_rootDirs_has_failed: {
+        NEWLINE: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Do_not_emit_use_strict_directives_in_module_output: {
+        Option_0_can_only_be_specified_in_tsconfig_json_file: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Enable_strict_null_checks: {
+        Enables_experimental_support_for_ES7_decorators: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Unknown_option_excludes_Did_you_mean_exclude: {
+        Enables_experimental_support_for_emitting_type_metadata_for_decorators: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Raise_error_on_this_expressions_with_an_implied_any_type: {
+        Enables_experimental_support_for_ES7_async_functions: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Resolving_type_reference_directive_0_containing_file_1_root_directory_2: {
+        Specify_module_resolution_strategy_Colon_node_Node_js_or_classic_TypeScript_pre_1_6: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Resolving_using_primary_search_paths: {
+        Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Resolving_from_node_modules_folder: {
+        Successfully_created_a_tsconfig_json_file: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2: {
+        Suppress_excess_property_checks_for_object_literals: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Type_reference_directive_0_was_not_resolved: {
+        Stylize_errors_and_messages_using_color_and_context_experimental: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Resolving_with_primary_search_path_0: {
+        Do_not_report_errors_on_unused_labels: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Root_directory_cannot_be_determined_skipping_primary_search_paths: {
+        Report_error_when_not_all_code_paths_in_function_return_a_value: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set: {
+        Report_errors_for_fallthrough_cases_in_switch_statement: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Type_declaration_files_to_be_included_in_compilation: {
+        Do_not_report_errors_on_unreachable_code: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Looking_up_in_node_modules_folder_initial_location_0: {
+        Disallow_inconsistently_cased_references_to_the_same_file: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_modules_folder: {
+        Specify_library_files_to_be_included_in_the_compilation_Colon: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1: {
+        Specify_JSX_code_generation_Colon_preserve_react_native_or_react: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set: {
+        File_0_has_an_unsupported_extension_so_skipping_it: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        The_config_file_0_found_doesn_t_contain_any_source_files: {
+        Only_amd_and_system_modules_are_supported_alongside_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Resolving_real_path_for_0_result_1: {
+        Base_directory_to_resolve_non_absolute_module_names: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system: {
+        Deprecated_Use_jsxFactory_instead_Specify_the_object_invoked_for_createElement_when_targeting_react_JSX_emit: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        File_name_0_has_a_1_extension_stripping_it: {
+        Enable_tracing_of_the_name_resolution_process: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        _0_is_declared_but_never_used: {
+        Resolving_module_0_from_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Report_errors_on_unused_locals: {
+        Explicitly_specified_module_resolution_kind_Colon_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Report_errors_on_unused_parameters: {
+        Module_resolution_kind_is_not_specified_using_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        The_maximum_dependency_depth_to_search_under_node_modules_and_load_JavaScript_files: {
+        Module_name_0_was_successfully_resolved_to_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        No_types_specified_in_package_json_but_allowJs_is_set_so_returning_main_value_of_0: {
+        Module_name_0_was_not_resolved: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Property_0_is_declared_but_never_used: {
+        paths_option_is_specified_looking_for_a_pattern_to_match_module_name_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Import_emit_helpers_from_tslib: {
+        Module_name_0_matched_pattern_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Auto_discovery_for_typings_is_enabled_in_project_0_Running_extra_resolution_pass_for_module_1_using_cache_location_2: {
+        Trying_substitution_0_candidate_module_location_Colon_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Variable_0_implicitly_has_an_1_type: {
+        Resolving_module_name_0_relative_to_base_url_1_2: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Parameter_0_implicitly_has_an_1_type: {
+        Loading_module_as_file_Slash_folder_candidate_module_location_0_target_file_type_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Member_0_implicitly_has_an_1_type: {
+        File_0_does_not_exist: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        new_expression_whose_target_lacks_a_construct_signature_implicitly_has_an_any_type: {
+        File_0_exist_use_it_as_a_name_resolution_result: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        _0_which_lacks_return_type_annotation_implicitly_has_an_1_return_type: {
+        Loading_module_0_from_node_modules_folder_target_file_type_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type: {
+        Found_package_json_at_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type: {
+        package_json_does_not_have_a_0_field: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number: {
+        package_json_has_0_field_1_that_references_2: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Index_signature_of_object_type_implicitly_has_an_any_type: {
+        Allow_javascript_files_to_be_compiled: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Object_literal_s_property_0_implicitly_has_an_1_type: {
+        Option_0_should_have_array_of_strings_as_a_value: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Rest_parameter_0_implicitly_has_an_any_type: {
+        Checking_if_0_is_the_longest_matching_prefix_for_1_2: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type: {
+        Expected_type_of_0_field_in_package_json_to_be_string_got_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        _0_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_and_is_referenced_directly_or_indirectly_in_its_own_initializer: {
+        baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        _0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions: {
+        rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions: {
+        Longest_matching_prefix_for_0_is_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_type: {
+        Loading_0_from_the_root_dir_1_candidate_location_2: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists: {
+        Trying_other_entries_in_rootDirs: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Unreachable_code_detected: {
+        Module_resolution_using_rootDirs_has_failed: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Unused_label: {
+        Do_not_emit_use_strict_directives_in_module_output: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Fallthrough_case_in_switch: {
+        Enable_strict_null_checks: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Not_all_code_paths_return_a_value: {
+        Unknown_option_excludes_Did_you_mean_exclude: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Binding_element_0_implicitly_has_an_1_type: {
+        Raise_error_on_this_expressions_with_an_implied_any_type: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_parameter_type_annotation: {
+        Resolving_type_reference_directive_0_containing_file_1_root_directory_2: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Property_0_implicitly_has_type_any_because_its_get_accessor_lacks_a_return_type_annotation: {
+        Resolving_using_primary_search_paths: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        You_cannot_rename_this_element: {
+        Resolving_from_node_modules_folder: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library: {
+        Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        import_can_only_be_used_in_a_ts_file: {
+        Type_reference_directive_0_was_not_resolved: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        export_can_only_be_used_in_a_ts_file: {
+        Resolving_with_primary_search_path_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        type_parameter_declarations_can_only_be_used_in_a_ts_file: {
+        Root_directory_cannot_be_determined_skipping_primary_search_paths: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        implements_clauses_can_only_be_used_in_a_ts_file: {
+        Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        interface_declarations_can_only_be_used_in_a_ts_file: {
+        Type_declaration_files_to_be_included_in_compilation: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        module_declarations_can_only_be_used_in_a_ts_file: {
+        Looking_up_in_node_modules_folder_initial_location_0: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        type_aliases_can_only_be_used_in_a_ts_file: {
+        Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_modules_folder: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        _0_can_only_be_used_in_a_ts_file: {
+        Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        types_can_only_be_used_in_a_ts_file: {
+        Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        type_arguments_can_only_be_used_in_a_ts_file: {
+        The_config_file_0_found_doesn_t_contain_any_source_files: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        parameter_modifiers_can_only_be_used_in_a_ts_file: {
+        Resolving_real_path_for_0_result_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        enum_declarations_can_only_be_used_in_a_ts_file: {
+        Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        type_assertion_expressions_can_only_be_used_in_a_ts_file: {
+        File_name_0_has_a_1_extension_stripping_it: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Only_identifiers_Slashqualified_names_with_optional_type_arguments_are_currently_supported_in_a_class_extends_clauses: {
+        _0_is_declared_but_never_used: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        class_expressions_are_not_currently_supported: {
+        Report_errors_on_unused_locals: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        JSX_attributes_must_only_be_assigned_a_non_empty_expression: {
+        Report_errors_on_unused_parameters: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        JSX_elements_cannot_have_multiple_attributes_with_the_same_name: {
+        The_maximum_dependency_depth_to_search_under_node_modules_and_load_JavaScript_files: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Expected_corresponding_JSX_closing_tag_for_0: {
+        Cannot_import_type_declaration_files_Consider_importing_0_instead_of_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        JSX_attribute_expected: {
+        Property_0_is_declared_but_never_used: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Cannot_use_JSX_unless_the_jsx_flag_is_provided: {
+        Import_emit_helpers_from_tslib: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        A_constructor_cannot_contain_a_super_call_when_its_class_extends_null: {
+        Auto_discovery_for_typings_is_enabled_in_project_0_Running_extra_resolution_pass_for_module_1_using_cache_location_2: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses: {
+        Parse_in_strict_mode_and_emit_use_strict_for_each_source_file: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses: {
+        Module_0_was_resolved_to_1_but_jsx_is_not_set: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        JSX_element_0_has_no_corresponding_closing_tag: {
+        Module_0_was_resolved_to_1_but_allowJs_is_not_set: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class: {
+        Module_0_was_resolved_as_locally_declared_ambient_module_in_file_1: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Unknown_typing_option_0: {
+        Module_0_was_resolved_as_ambient_module_declared_in_1_since_this_file_was_not_modified: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Circularity_detected_while_resolving_configuration_Colon_0: {
+        Specify_the_JSX_factory_function_to_use_when_targeting_react_JSX_emit_e_g_React_createElement_or_h: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        The_path_in_an_extends_options_must_be_relative_or_rooted: {
+        Resolution_for_module_0_was_found_in_cache: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-    };
-}
-declare namespace ts {
-    interface ErrorCallback {
-        (message: DiagnosticMessage, length: number): void;
-    }
-    function tokenIsIdentifierOrKeyword(token: SyntaxKind): boolean;
-    interface Scanner {
-        getStartPos(): number;
-        getToken(): SyntaxKind;
-        getTextPos(): number;
-        getTokenPos(): number;
-        getTokenText(): string;
-        getTokenValue(): string;
-        hasExtendedUnicodeEscape(): boolean;
-        hasPrecedingLineBreak(): boolean;
-        isIdentifier(): boolean;
-        isReservedWord(): boolean;
-        isUnterminated(): boolean;
-        reScanGreaterToken(): SyntaxKind;
-        reScanSlashToken(): SyntaxKind;
-        reScanTemplateToken(): SyntaxKind;
-        scanJsxIdentifier(): SyntaxKind;
-        scanJsxAttributeValue(): SyntaxKind;
-        reScanJsxToken(): SyntaxKind;
-        scanJsxToken(): SyntaxKind;
-        scanJSDocToken(): SyntaxKind;
-        scan(): SyntaxKind;
-        getText(): string;
-        setText(text: string, start?: number, length?: number): void;
-        setOnError(onError: ErrorCallback): void;
-        setScriptTarget(scriptTarget: ScriptTarget): void;
-        setLanguageVariant(variant: LanguageVariant): void;
-        setTextPos(textPos: number): void;
-        lookAhead<T>(callback: () => T): T;
-        scanRange<T>(start: number, length: number, callback: () => T): T;
-        tryScan<T>(callback: () => T): T;
-    }
-    function isUnicodeIdentifierStart(code: number, languageVersion: ScriptTarget): boolean;
-    function tokenToString(t: SyntaxKind): string;
-    function stringToToken(s: string): SyntaxKind;
-    function computeLineStarts(text: string): number[];
-    function getPositionOfLineAndCharacter(sourceFile: SourceFile, line: number, character: number): number;
-    function computePositionOfLineAndCharacter(lineStarts: number[], line: number, character: number): number;
-    function getLineStarts(sourceFile: SourceFile): number[];
-    /**
-     * We assume the first line starts at position 0 and 'position' is non-negative.
-     */
-    function computeLineAndCharacterOfPosition(lineStarts: number[], position: number): {
-        line: number;
-        character: number;
-    };
-    function getLineAndCharacterOfPosition(sourceFile: SourceFile, position: number): LineAndCharacter;
-    function isWhiteSpace(ch: number): boolean;
-    /** Does not include line breaks. For that, see isWhiteSpaceLike. */
-    function isWhiteSpaceSingleLine(ch: number): boolean;
-    function isLineBreak(ch: number): boolean;
-    function isOctalDigit(ch: number): boolean;
-    function couldStartTrivia(text: string, pos: number): boolean;
-    function skipTrivia(text: string, pos: number, stopAfterLineBreak?: boolean, stopAtComments?: boolean): number;
-    function forEachLeadingCommentRange<T, U>(text: string, pos: number, cb: (pos: number, end: number, kind: SyntaxKind, hasTrailingNewLine: boolean, state: T) => U, state?: T): U;
-    function forEachTrailingCommentRange<T, U>(text: string, pos: number, cb: (pos: number, end: number, kind: SyntaxKind, hasTrailingNewLine: boolean, state: T) => U, state?: T): U;
-    function reduceEachLeadingCommentRange<T, U>(text: string, pos: number, cb: (pos: number, end: number, kind: SyntaxKind, hasTrailingNewLine: boolean, state: T, memo: U) => U, state: T, initial: U): U;
-    function reduceEachTrailingCommentRange<T, U>(text: string, pos: number, cb: (pos: number, end: number, kind: SyntaxKind, hasTrailingNewLine: boolean, state: T, memo: U) => U, state: T, initial: U): U;
-    function getLeadingCommentRanges(text: string, pos: number): CommentRange[];
-    function getTrailingCommentRanges(text: string, pos: number): CommentRange[];
-    /** Optionally, get the shebang */
-    function getShebang(text: string): string;
-    function isIdentifierStart(ch: number, languageVersion: ScriptTarget): boolean;
-    function isIdentifierPart(ch: number, languageVersion: ScriptTarget): boolean;
-    function isIdentifierText(name: string, languageVersion: ScriptTarget): boolean;
-    function createScanner(languageVersion: ScriptTarget, skipTrivia: boolean, languageVariant?: LanguageVariant, text?: string, onError?: ErrorCallback, start?: number, length?: number): Scanner;
-}
-declare namespace ts {
-    function updateNode<T extends Node>(updated: T, original: T): T;
-    function createNodeArray<T extends Node>(elements?: T[], location?: TextRange, hasTrailingComma?: boolean): NodeArray<T>;
-    function createSynthesizedNode(kind: SyntaxKind, startsOnNewLine?: boolean): Node;
-    function createSynthesizedNodeArray<T extends Node>(elements?: T[]): NodeArray<T>;
-    /**
-     * Creates a shallow, memberwise clone of a node with no source map location.
-     */
-    function getSynthesizedClone<T extends Node>(node: T): T;
-    /**
-     * Creates a shallow, memberwise clone of a node for mutation.
-     */
-    function getMutableClone<T extends Node>(node: T): T;
-    function createLiteral(textSource: StringLiteral | Identifier, location?: TextRange): StringLiteral;
-    function createLiteral(value: string, location?: TextRange): StringLiteral;
-    function createLiteral(value: number, location?: TextRange): NumericLiteral;
-    function createLiteral(value: string | number | boolean, location?: TextRange): PrimaryExpression;
-    function createIdentifier(text: string, location?: TextRange): Identifier;
-    function createTempVariable(recordTempVariable: ((node: Identifier) => void) | undefined, location?: TextRange): Identifier;
-    function createLoopVariable(location?: TextRange): Identifier;
-    function createUniqueName(text: string, location?: TextRange): Identifier;
-    function getGeneratedNameForNode(node: Node, location?: TextRange): Identifier;
-    function createToken(token: SyntaxKind): Node;
-    function createSuper(): PrimaryExpression;
-    function createThis(location?: TextRange): PrimaryExpression;
-    function createNull(): PrimaryExpression;
-    function createComputedPropertyName(expression: Expression, location?: TextRange): ComputedPropertyName;
-    function updateComputedPropertyName(node: ComputedPropertyName, expression: Expression): ComputedPropertyName;
-    function createParameter(name: string | Identifier | BindingPattern, initializer?: Expression, location?: TextRange): ParameterDeclaration;
-    function createParameterDeclaration(decorators: Decorator[], modifiers: Modifier[], dotDotDotToken: Node, name: string | Identifier | BindingPattern, questionToken: Node, type: TypeNode, initializer: Expression, location?: TextRange, flags?: NodeFlags): ParameterDeclaration;
-    function updateParameterDeclaration(node: ParameterDeclaration, decorators: Decorator[], modifiers: Modifier[], name: BindingName, type: TypeNode, initializer: Expression): ParameterDeclaration;
-    function createProperty(decorators: Decorator[], modifiers: Modifier[], name: string | PropertyName, questionToken: Node, type: TypeNode, initializer: Expression, location?: TextRange): PropertyDeclaration;
-    function updateProperty(node: PropertyDeclaration, decorators: Decorator[], modifiers: Modifier[], name: PropertyName, type: TypeNode, initializer: Expression): PropertyDeclaration;
-    function createMethod(decorators: Decorator[], modifiers: Modifier[], asteriskToken: Node, name: string | PropertyName, typeParameters: TypeParameterDeclaration[], parameters: ParameterDeclaration[], type: TypeNode, body: Block, location?: TextRange, flags?: NodeFlags): MethodDeclaration;
-    function updateMethod(node: MethodDeclaration, decorators: Decorator[], modifiers: Modifier[], name: PropertyName, typeParameters: TypeParameterDeclaration[], parameters: ParameterDeclaration[], type: TypeNode, body: Block): MethodDeclaration;
-    function createConstructor(decorators: Decorator[], modifiers: Modifier[], parameters: ParameterDeclaration[], body: Block, location?: TextRange, flags?: NodeFlags): ConstructorDeclaration;
-    function updateConstructor(node: ConstructorDeclaration, decorators: Decorator[], modifiers: Modifier[], parameters: ParameterDeclaration[], body: Block): ConstructorDeclaration;
-    function createGetAccessor(decorators: Decorator[], modifiers: Modifier[], name: string | PropertyName, parameters: ParameterDeclaration[], type: TypeNode, body: Block, location?: TextRange, flags?: NodeFlags): GetAccessorDeclaration;
-    function updateGetAccessor(node: GetAccessorDeclaration, decorators: Decorator[], modifiers: Modifier[], name: PropertyName, parameters: ParameterDeclaration[], type: TypeNode, body: Block): GetAccessorDeclaration;
-    function createSetAccessor(decorators: Decorator[], modifiers: Modifier[], name: string | PropertyName, parameters: ParameterDeclaration[], body: Block, location?: TextRange, flags?: NodeFlags): SetAccessorDeclaration;
-    function updateSetAccessor(node: SetAccessorDeclaration, decorators: Decorator[], modifiers: Modifier[], name: PropertyName, parameters: ParameterDeclaration[], body: Block): SetAccessorDeclaration;
-    function createObjectBindingPattern(elements: BindingElement[], location?: TextRange): ObjectBindingPattern;
-    function updateObjectBindingPattern(node: ObjectBindingPattern, elements: BindingElement[]): ObjectBindingPattern;
-    function createArrayBindingPattern(elements: ArrayBindingElement[], location?: TextRange): ArrayBindingPattern;
-    function updateArrayBindingPattern(node: ArrayBindingPattern, elements: ArrayBindingElement[]): ArrayBindingPattern;
-    function createBindingElement(propertyName: string | PropertyName, dotDotDotToken: Node, name: string | BindingName, initializer?: Expression, location?: TextRange): BindingElement;
-    function updateBindingElement(node: BindingElement, propertyName: PropertyName, name: BindingName, initializer: Expression): BindingElement;
-    function createArrayLiteral(elements?: Expression[], location?: TextRange, multiLine?: boolean): ArrayLiteralExpression;
-    function updateArrayLiteral(node: ArrayLiteralExpression, elements: Expression[]): ArrayLiteralExpression;
-    function createObjectLiteral(properties?: ObjectLiteralElementLike[], location?: TextRange, multiLine?: boolean): ObjectLiteralExpression;
-    function updateObjectLiteral(node: ObjectLiteralExpression, properties: ObjectLiteralElementLike[]): ObjectLiteralExpression;
-    function createPropertyAccess(expression: Expression, name: string | Identifier, location?: TextRange, flags?: NodeFlags): PropertyAccessExpression;
-    function updatePropertyAccess(node: PropertyAccessExpression, expression: Expression, name: Identifier): PropertyAccessExpression;
-    function createElementAccess(expression: Expression, index: number | Expression, location?: TextRange): ElementAccessExpression;
-    function updateElementAccess(node: ElementAccessExpression, expression: Expression, argumentExpression: Expression): ElementAccessExpression;
-    function createCall(expression: Expression, typeArguments: TypeNode[], argumentsArray: Expression[], location?: TextRange, flags?: NodeFlags): CallExpression;
-    function updateCall(node: CallExpression, expression: Expression, typeArguments: TypeNode[], argumentsArray: Expression[]): CallExpression;
-    function createNew(expression: Expression, typeArguments: TypeNode[], argumentsArray: Expression[], location?: TextRange, flags?: NodeFlags): NewExpression;
-    function updateNew(node: NewExpression, expression: Expression, typeArguments: TypeNode[], argumentsArray: Expression[]): NewExpression;
-    function createTaggedTemplate(tag: Expression, template: Template, location?: TextRange): TaggedTemplateExpression;
-    function updateTaggedTemplate(node: TaggedTemplateExpression, tag: Expression, template: Template): TaggedTemplateExpression;
-    function createParen(expression: Expression, location?: TextRange): ParenthesizedExpression;
-    function updateParen(node: ParenthesizedExpression, expression: Expression): ParenthesizedExpression;
-    function createFunctionExpression(asteriskToken: Node, name: string | Identifier, typeParameters: TypeParameterDeclaration[], parameters: ParameterDeclaration[], type: TypeNode, body: Block, location?: TextRange, flags?: NodeFlags): FunctionExpression;
-    function updateFunctionExpression(node: FunctionExpression, name: Identifier, typeParameters: TypeParameterDeclaration[], parameters: ParameterDeclaration[], type: TypeNode, body: Block): FunctionExpression;
-    function createArrowFunction(modifiers: Modifier[], typeParameters: TypeParameterDeclaration[], parameters: ParameterDeclaration[], type: TypeNode, equalsGreaterThanToken: Node, body: ConciseBody, location?: TextRange, flags?: NodeFlags): ArrowFunction;
-    function updateArrowFunction(node: ArrowFunction, modifiers: Modifier[], typeParameters: TypeParameterDeclaration[], parameters: ParameterDeclaration[], type: TypeNode, body: ConciseBody): ArrowFunction;
-    function createDelete(expression: Expression, location?: TextRange): DeleteExpression;
-    function updateDelete(node: DeleteExpression, expression: Expression): Expression;
-    function createTypeOf(expression: Expression, location?: TextRange): TypeOfExpression;
-    function updateTypeOf(node: TypeOfExpression, expression: Expression): Expression;
-    function createVoid(expression: Expression, location?: TextRange): VoidExpression;
-    function updateVoid(node: VoidExpression, expression: Expression): VoidExpression;
-    function createAwait(expression: Expression, location?: TextRange): AwaitExpression;
-    function updateAwait(node: AwaitExpression, expression: Expression): AwaitExpression;
-    function createPrefix(operator: SyntaxKind, operand: Expression, location?: TextRange): PrefixUnaryExpression;
-    function updatePrefix(node: PrefixUnaryExpression, operand: Expression): PrefixUnaryExpression;
-    function createPostfix(operand: Expression, operator: SyntaxKind, location?: TextRange): PostfixUnaryExpression;
-    function updatePostfix(node: PostfixUnaryExpression, operand: Expression): PostfixUnaryExpression;
-    function createBinary(left: Expression, operator: SyntaxKind | Node, right: Expression, location?: TextRange): BinaryExpression;
-    function updateBinary(node: BinaryExpression, left: Expression, right: Expression): BinaryExpression;
-    function createConditional(condition: Expression, questionToken: Node, whenTrue: Expression, colonToken: Node, whenFalse: Expression, location?: TextRange): ConditionalExpression;
-    function updateConditional(node: ConditionalExpression, condition: Expression, whenTrue: Expression, whenFalse: Expression): ConditionalExpression;
-    function createTemplateExpression(head: TemplateLiteralFragment, templateSpans: TemplateSpan[], location?: TextRange): TemplateExpression;
-    function updateTemplateExpression(node: TemplateExpression, head: TemplateLiteralFragment, templateSpans: TemplateSpan[]): TemplateExpression;
-    function createYield(asteriskToken: Node, expression: Expression, location?: TextRange): YieldExpression;
-    function updateYield(node: YieldExpression, expression: Expression): YieldExpression;
-    function createSpread(expression: Expression, location?: TextRange): SpreadElementExpression;
-    function updateSpread(node: SpreadElementExpression, expression: Expression): SpreadElementExpression;
-    function createClassExpression(modifiers: Modifier[], name: Identifier, typeParameters: TypeParameterDeclaration[], heritageClauses: HeritageClause[], members: ClassElement[], location?: TextRange): ClassExpression;
-    function updateClassExpression(node: ClassExpression, modifiers: Modifier[], name: Identifier, typeParameters: TypeParameterDeclaration[], heritageClauses: HeritageClause[], members: ClassElement[]): ClassExpression;
-    function createOmittedExpression(location?: TextRange): OmittedExpression;
-    function createExpressionWithTypeArguments(typeArguments: TypeNode[], expression: Expression, location?: TextRange): ExpressionWithTypeArguments;
-    function updateExpressionWithTypeArguments(node: ExpressionWithTypeArguments, typeArguments: TypeNode[], expression: Expression): ExpressionWithTypeArguments;
-    function createTemplateSpan(expression: Expression, literal: TemplateLiteralFragment, location?: TextRange): TemplateSpan;
-    function updateTemplateSpan(node: TemplateSpan, expression: Expression, literal: TemplateLiteralFragment): TemplateSpan;
-    function createBlock(statements: Statement[], location?: TextRange, multiLine?: boolean, flags?: NodeFlags): Block;
-    function updateBlock(node: Block, statements: Statement[]): Block;
-    function createVariableStatement(modifiers: Modifier[], declarationList: VariableDeclarationList | VariableDeclaration[], location?: TextRange, flags?: NodeFlags): VariableStatement;
-    function updateVariableStatement(node: VariableStatement, modifiers: Modifier[], declarationList: VariableDeclarationList): VariableStatement;
-    function createVariableDeclarationList(declarations: VariableDeclaration[], location?: TextRange, flags?: NodeFlags): VariableDeclarationList;
-    function updateVariableDeclarationList(node: VariableDeclarationList, declarations: VariableDeclaration[]): VariableDeclarationList;
-    function createVariableDeclaration(name: string | BindingPattern | Identifier, type?: TypeNode, initializer?: Expression, location?: TextRange, flags?: NodeFlags): VariableDeclaration;
-    function updateVariableDeclaration(node: VariableDeclaration, name: BindingName, type: TypeNode, initializer: Expression): VariableDeclaration;
-    function createEmptyStatement(location: TextRange): EmptyStatement;
-    function createStatement(expression: Expression, location?: TextRange, flags?: NodeFlags): ExpressionStatement;
-    function updateStatement(node: ExpressionStatement, expression: Expression): ExpressionStatement;
-    function createIf(expression: Expression, thenStatement: Statement, elseStatement?: Statement, location?: TextRange): IfStatement;
-    function updateIf(node: IfStatement, expression: Expression, thenStatement: Statement, elseStatement: Statement): IfStatement;
-    function createDo(statement: Statement, expression: Expression, location?: TextRange): DoStatement;
-    function updateDo(node: DoStatement, statement: Statement, expression: Expression): DoStatement;
-    function createWhile(expression: Expression, statement: Statement, location?: TextRange): WhileStatement;
-    function updateWhile(node: WhileStatement, expression: Expression, statement: Statement): WhileStatement;
-    function createFor(initializer: ForInitializer, condition: Expression, incrementor: Expression, statement: Statement, location?: TextRange): ForStatement;
-    function updateFor(node: ForStatement, initializer: ForInitializer, condition: Expression, incrementor: Expression, statement: Statement): ForStatement;
-    function createForIn(initializer: ForInitializer, expression: Expression, statement: Statement, location?: TextRange): ForInStatement;
-    function updateForIn(node: ForInStatement, initializer: ForInitializer, expression: Expression, statement: Statement): ForInStatement;
-    function createForOf(initializer: ForInitializer, expression: Expression, statement: Statement, location?: TextRange): ForOfStatement;
-    function updateForOf(node: ForInStatement, initializer: ForInitializer, expression: Expression, statement: Statement): ForInStatement;
-    function createContinue(label?: Identifier, location?: TextRange): BreakStatement;
-    function updateContinue(node: ContinueStatement, label: Identifier): BreakStatement;
-    function createBreak(label?: Identifier, location?: TextRange): BreakStatement;
-    function updateBreak(node: BreakStatement, label: Identifier): BreakStatement;
-    function createReturn(expression?: Expression, location?: TextRange): ReturnStatement;
-    function updateReturn(node: ReturnStatement, expression: Expression): ReturnStatement;
-    function createWith(expression: Expression, statement: Statement, location?: TextRange): WithStatement;
-    function updateWith(node: WithStatement, expression: Expression, statement: Statement): WithStatement;
-    function createSwitch(expression: Expression, caseBlock: CaseBlock, location?: TextRange): SwitchStatement;
-    function updateSwitch(node: SwitchStatement, expression: Expression, caseBlock: CaseBlock): SwitchStatement;
-    function createLabel(label: string | Identifier, statement: Statement, location?: TextRange): LabeledStatement;
-    function updateLabel(node: LabeledStatement, label: Identifier, statement: Statement): LabeledStatement;
-    function createThrow(expression: Expression, location?: TextRange): ThrowStatement;
-    function updateThrow(node: ThrowStatement, expression: Expression): ThrowStatement;
-    function createTry(tryBlock: Block, catchClause: CatchClause, finallyBlock: Block, location?: TextRange): TryStatement;
-    function updateTry(node: TryStatement, tryBlock: Block, catchClause: CatchClause, finallyBlock: Block): TryStatement;
-    function createCaseBlock(clauses: CaseOrDefaultClause[], location?: TextRange): CaseBlock;
-    function updateCaseBlock(node: CaseBlock, clauses: CaseOrDefaultClause[]): CaseBlock;
-    function createFunctionDeclaration(decorators: Decorator[], modifiers: Modifier[], asteriskToken: Node, name: string | Identifier, typeParameters: TypeParameterDeclaration[], parameters: ParameterDeclaration[], type: TypeNode, body: Block, location?: TextRange, flags?: NodeFlags): FunctionDeclaration;
-    function updateFunctionDeclaration(node: FunctionDeclaration, decorators: Decorator[], modifiers: Modifier[], name: Identifier, typeParameters: TypeParameterDeclaration[], parameters: ParameterDeclaration[], type: TypeNode, body: Block): FunctionDeclaration;
-    function createClassDeclaration(decorators: Decorator[], modifiers: Modifier[], name: Identifier, typeParameters: TypeParameterDeclaration[], heritageClauses: HeritageClause[], members: ClassElement[], location?: TextRange): ClassDeclaration;
-    function updateClassDeclaration(node: ClassDeclaration, decorators: Decorator[], modifiers: Modifier[], name: Identifier, typeParameters: TypeParameterDeclaration[], heritageClauses: HeritageClause[], members: ClassElement[]): ClassDeclaration;
-    function createImportDeclaration(decorators: Decorator[], modifiers: Modifier[], importClause: ImportClause, moduleSpecifier?: Expression, location?: TextRange): ImportDeclaration;
-    function updateImportDeclaration(node: ImportDeclaration, decorators: Decorator[], modifiers: Modifier[], importClause: ImportClause, moduleSpecifier: Expression): ImportDeclaration;
-    function createImportClause(name: Identifier, namedBindings: NamedImportBindings, location?: TextRange): ImportClause;
-    function updateImportClause(node: ImportClause, name: Identifier, namedBindings: NamedImportBindings): ImportClause;
-    function createNamespaceImport(name: Identifier, location?: TextRange): NamespaceImport;
-    function updateNamespaceImport(node: NamespaceImport, name: Identifier): NamespaceImport;
-    function createNamedImports(elements: ImportSpecifier[], location?: TextRange): NamedImports;
+        Directory_0_does_not_exist_skipping_all_lookups_in_it: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Show_diagnostic_information: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Show_verbose_diagnostic_information: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Emit_a_single_file_with_source_maps_instead_of_having_a_separate_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Emit_the_source_alongside_the_sourcemaps_within_a_single_file_requires_inlineSourceMap_or_sourceMap_to_be_set: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Transpile_each_file_as_a_separate_module_similar_to_ts_transpileModule: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Print_names_of_generated_files_part_of_the_compilation: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Print_names_of_files_part_of_the_compilation: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        The_locale_used_when_displaying_messages_to_the_user_e_g_en_us: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Do_not_generate_custom_helper_functions_like_extends_in_compiled_output: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Do_not_include_the_default_library_file_lib_d_ts: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Do_not_add_triple_slash_references_or_imported_modules_to_the_list_of_compiled_files: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Deprecated_Use_skipLibCheck_instead_Skip_type_checking_of_default_library_declaration_files: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        List_of_folders_to_include_type_definitions_from: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Disable_size_limitations_on_JavaScript_projects: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        The_character_set_of_the_input_files: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Emit_a_UTF_8_Byte_Order_Mark_BOM_in_the_beginning_of_output_files: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Do_not_truncate_error_messages: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Output_directory_for_generated_declaration_files: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_series_of_entries_which_re_map_imports_to_lookup_locations_relative_to_the_baseUrl: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        List_of_root_folders_whose_combined_content_represents_the_structure_of_the_project_at_runtime: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Show_all_compiler_options: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Deprecated_Use_outFile_instead_Concatenate_and_emit_output_to_single_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Command_line_Options: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Basic_Options: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Strict_Type_Checking_Options: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Module_Resolution_Options: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Source_Map_Options: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Additional_Checks: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Experimental_Options: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Advanced_Options: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Provide_full_support_for_iterables_in_for_of_spread_and_destructuring_when_targeting_ES5_or_ES3: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Enable_all_strict_type_checking_options: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        List_of_language_service_plugins: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Scoped_package_detected_looking_in_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Reusing_resolution_of_module_0_to_file_1_from_old_program: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Reusing_module_resolutions_originating_in_0_since_resolutions_are_unchanged_from_old_program: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Disable_strict_checking_of_generic_signatures_in_function_types: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Variable_0_implicitly_has_an_1_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Parameter_0_implicitly_has_an_1_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Member_0_implicitly_has_an_1_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        new_expression_whose_target_lacks_a_construct_signature_implicitly_has_an_any_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        _0_which_lacks_return_type_annotation_implicitly_has_an_1_return_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Could_not_find_a_declaration_file_for_module_0_1_implicitly_has_an_any_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Element_implicitly_has_an_any_type_because_type_0_has_no_index_signature: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Object_literal_s_property_0_implicitly_has_an_1_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Rest_parameter_0_implicitly_has_an_any_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        _0_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_and_is_referenced_directly_or_indirectly_in_its_own_initializer: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        _0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Unreachable_code_detected: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Unused_label: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Fallthrough_case_in_switch: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Not_all_code_paths_return_a_value: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Binding_element_0_implicitly_has_an_1_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_parameter_type_annotation: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Property_0_implicitly_has_type_any_because_its_get_accessor_lacks_a_return_type_annotation: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Variable_0_implicitly_has_type_1_in_some_locations_where_its_type_cannot_be_determined: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Try_npm_install_types_Slash_0_if_it_exists_or_add_a_new_declaration_d_ts_file_containing_declare_module_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Dynamic_import_s_specifier_must_be_of_type_string_but_here_has_type_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        You_cannot_rename_this_element: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        import_can_only_be_used_in_a_ts_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        export_can_only_be_used_in_a_ts_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        type_parameter_declarations_can_only_be_used_in_a_ts_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        implements_clauses_can_only_be_used_in_a_ts_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        interface_declarations_can_only_be_used_in_a_ts_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        module_declarations_can_only_be_used_in_a_ts_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        type_aliases_can_only_be_used_in_a_ts_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        _0_can_only_be_used_in_a_ts_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        types_can_only_be_used_in_a_ts_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        type_arguments_can_only_be_used_in_a_ts_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        parameter_modifiers_can_only_be_used_in_a_ts_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        enum_declarations_can_only_be_used_in_a_ts_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        type_assertion_expressions_can_only_be_used_in_a_ts_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Only_identifiers_Slashqualified_names_with_optional_type_arguments_are_currently_supported_in_a_class_extends_clause: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        class_expressions_are_not_currently_supported: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Language_service_is_disabled: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        JSX_attributes_must_only_be_assigned_a_non_empty_expression: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        JSX_elements_cannot_have_multiple_attributes_with_the_same_name: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Expected_corresponding_JSX_closing_tag_for_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        JSX_attribute_expected: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Cannot_use_JSX_unless_the_jsx_flag_is_provided: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_constructor_cannot_contain_a_super_call_when_its_class_extends_null: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        JSX_element_0_has_no_corresponding_closing_tag: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Unknown_type_acquisition_option_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        super_must_be_called_before_accessing_a_property_of_super_in_the_constructor_of_a_derived_class: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        _0_is_not_a_valid_meta_property_for_keyword_1_Did_you_mean_2: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Meta_property_0_is_only_allowed_in_the_body_of_a_function_declaration_function_expression_or_constructor: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Circularity_detected_while_resolving_configuration_Colon_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_path_in_an_extends_option_must_be_relative_or_rooted_but_0_is_not: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        The_files_list_in_config_file_0_is_empty: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        No_inputs_were_found_in_config_file_0_Specified_include_paths_were_1_and_exclude_paths_were_2: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Add_missing_super_call: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Make_super_call_the_first_statement_in_the_constructor: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Change_extends_to_implements: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Remove_declaration_for_Colon_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Implement_interface_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Implement_inherited_abstract_class: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Add_this_to_unresolved_variable: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Adding_a_tsconfig_json_file_will_help_organize_projects_that_contain_both_TypeScript_and_JavaScript_files_Learn_more_at_https_Colon_Slash_Slashaka_ms_Slashtsconfig: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Type_0_is_not_assignable_to_type_1_Two_different_types_with_this_name_exist_but_they_are_unrelated: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Import_0_from_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Change_0_to_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Add_0_to_existing_import_declaration_from_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Declare_property_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Add_index_signature_for_property_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Disable_checking_for_this_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Ignore_this_error_message: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Initialize_property_0_in_the_constructor: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Initialize_static_property_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Change_spelling_to_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Declare_method_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Declare_static_method_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Prefix_0_with_an_underscore: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Convert_function_to_an_ES2015_class: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Convert_function_0_to_class: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Octal_literal_types_must_use_ES2015_syntax_Use_the_syntax_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Octal_literals_are_not_allowed_in_enums_members_initializer_Use_the_syntax_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Report_errors_in_js_files: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+    };
+}
+declare namespace ts {
+    interface ErrorCallback {
+        (message: DiagnosticMessage, length: number): void;
+    }
+    function tokenIsIdentifierOrKeyword(token: SyntaxKind): boolean;
+    interface Scanner {
+        getStartPos(): number;
+        getToken(): SyntaxKind;
+        getTextPos(): number;
+        getTokenPos(): number;
+        getTokenText(): string;
+        getTokenValue(): string;
+        hasExtendedUnicodeEscape(): boolean;
+        hasPrecedingLineBreak(): boolean;
+        isIdentifier(): boolean;
+        isReservedWord(): boolean;
+        isUnterminated(): boolean;
+        getNumericLiteralFlags(): NumericLiteralFlags;
+        reScanGreaterToken(): SyntaxKind;
+        reScanSlashToken(): SyntaxKind;
+        reScanTemplateToken(): SyntaxKind;
+        scanJsxIdentifier(): SyntaxKind;
+        scanJsxAttributeValue(): SyntaxKind;
+        reScanJsxToken(): SyntaxKind;
+        scanJsxToken(): SyntaxKind;
+        scanJSDocToken(): SyntaxKind;
+        scan(): SyntaxKind;
+        getText(): string;
+        setText(text: string, start?: number, length?: number): void;
+        setOnError(onError: ErrorCallback): void;
+        setScriptTarget(scriptTarget: ScriptTarget): void;
+        setLanguageVariant(variant: LanguageVariant): void;
+        setTextPos(textPos: number): void;
+        lookAhead<T>(callback: () => T): T;
+        scanRange<T>(start: number, length: number, callback: () => T): T;
+        tryScan<T>(callback: () => T): T;
+    }
+    function isUnicodeIdentifierStart(code: number, languageVersion: ScriptTarget): boolean;
+    function tokenToString(t: SyntaxKind): string | undefined;
+    function stringToToken(s: string): SyntaxKind;
+    function computeLineStarts(text: string): number[];
+    function getPositionOfLineAndCharacter(sourceFile: SourceFile, line: number, character: number): number;
+    function computePositionOfLineAndCharacter(lineStarts: number[], line: number, character: number): number;
+    function getLineStarts(sourceFile: SourceFileLike): number[];
+    /**
+     * We assume the first line starts at position 0 and 'position' is non-negative.
+     */
+    function computeLineAndCharacterOfPosition(lineStarts: number[], position: number): {
+        line: number;
+        character: number;
+    };
+    function getLineAndCharacterOfPosition(sourceFile: SourceFileLike, position: number): LineAndCharacter;
+    function isWhiteSpaceLike(ch: number): boolean;
+    /** Does not include line breaks. For that, see isWhiteSpaceLike. */
+    function isWhiteSpaceSingleLine(ch: number): boolean;
+    function isLineBreak(ch: number): boolean;
+    function isOctalDigit(ch: number): boolean;
+    function couldStartTrivia(text: string, pos: number): boolean;
+    function skipTrivia(text: string, pos: number, stopAfterLineBreak?: boolean, stopAtComments?: boolean): number;
+    function forEachLeadingCommentRange<T, U>(text: string, pos: number, cb: (pos: number, end: number, kind: CommentKind, hasTrailingNewLine: boolean, state: T) => U, state?: T): U | undefined;
+    function forEachTrailingCommentRange<T, U>(text: string, pos: number, cb: (pos: number, end: number, kind: CommentKind, hasTrailingNewLine: boolean, state: T) => U, state?: T): U | undefined;
+    function reduceEachLeadingCommentRange<T, U>(text: string, pos: number, cb: (pos: number, end: number, kind: CommentKind, hasTrailingNewLine: boolean, state: T, memo: U) => U, state: T, initial: U): U;
+    function reduceEachTrailingCommentRange<T, U>(text: string, pos: number, cb: (pos: number, end: number, kind: CommentKind, hasTrailingNewLine: boolean, state: T, memo: U) => U, state: T, initial: U): U;
+    function getLeadingCommentRanges(text: string, pos: number): CommentRange[] | undefined;
+    function getTrailingCommentRanges(text: string, pos: number): CommentRange[] | undefined;
+    /** Optionally, get the shebang */
+    function getShebang(text: string): string | undefined;
+    function isIdentifierStart(ch: number, languageVersion: ScriptTarget): boolean;
+    function isIdentifierPart(ch: number, languageVersion: ScriptTarget): boolean;
+    function isIdentifierText(name: string, languageVersion: ScriptTarget): boolean;
+    function createScanner(languageVersion: ScriptTarget, skipTrivia: boolean, languageVariant?: LanguageVariant, text?: string, onError?: ErrorCallback, start?: number, length?: number): Scanner;
+}
+declare namespace ts {
+    function createNode(kind: SyntaxKind, pos?: number, end?: number): Node;
+    /**
+     * Invokes a callback for each child of the given node. The 'cbNode' callback is invoked for all child nodes
+     * stored in properties. If a 'cbNodes' callback is specified, it is invoked for embedded arrays; otherwise,
+     * embedded arrays are flattened and the 'cbNode' callback is invoked for each element. If a callback returns
+     * a truthy value, iteration stops and that value is returned. Otherwise, undefined is returned.
+     *
+     * @param node a given node to visit its children
+     * @param cbNode a callback to be invoked for all child nodes
+     * @param cbNodeArray a callback to be invoked for embedded array
+     */
+    function forEachChild<T>(node: Node, cbNode: (node: Node) => T | undefined, cbNodeArray?: (nodes: NodeArray<Node>) => T | undefined): T | undefined;
+    function createSourceFile(fileName: string, sourceText: string, languageVersion: ScriptTarget, setParentNodes?: boolean, scriptKind?: ScriptKind): SourceFile;
+    function parseIsolatedEntityName(text: string, languageVersion: ScriptTarget): EntityName;
+    /**
+     * Parse json text into SyntaxTree and return node and parse errors if any
+     * @param fileName
+     * @param sourceText
+     */
+    function parseJsonText(fileName: string, sourceText: string): JsonSourceFile;
+    function isExternalModule(file: SourceFile): boolean;
+    function updateSourceFile(sourceFile: SourceFile, newText: string, textChangeRange: TextChangeRange, aggressiveChecks?: boolean): SourceFile;
+    function parseIsolatedJSDocComment(content: string, start?: number, length?: number): {
+        jsDoc: JSDoc;
+        diagnostics: Diagnostic[];
+    };
+    function parseJSDocTypeExpressionForTests(content: string, start?: number, length?: number): {
+        jsDocTypeExpression: JSDocTypeExpression;
+        diagnostics: Diagnostic[];
+    };
+}
+declare namespace ts {
+    const enum ModuleInstanceState {
+        NonInstantiated = 0,
+        Instantiated = 1,
+        ConstEnumOnly = 2,
+    }
+    function getModuleInstanceState(node: Node): ModuleInstanceState;
+    function bindSourceFile(file: SourceFile, options: CompilerOptions): void;
+    /**
+     * Computes the transform flags for a node, given the transform flags of its subtree
+     *
+     * @param node The node to analyze
+     * @param subtreeFlags Transform flags computed for this node's subtree
+     */
+    function computeTransformFlagsForNode(node: Node, subtreeFlags: TransformFlags): TransformFlags;
+    /**
+     * Gets the transform flags to exclude when unioning the transform flags of a subtree.
+     *
+     * NOTE: This needs to be kept up-to-date with the exclusions used in `computeTransformFlagsForNode`.
+     *       For performance reasons, `computeTransformFlagsForNode` uses local constant values rather
+     *       than calling this function.
+     */
+    function getTransformFlagsSubtreeExclusions(kind: SyntaxKind): TransformFlags;
+}
+declare namespace ts {
+    function trace(host: ModuleResolutionHost, message: DiagnosticMessage, ...args: any[]): void;
+    function isTraceEnabled(compilerOptions: CompilerOptions, host: ModuleResolutionHost): boolean;
+    /** Array that is only intended to be pushed to, never read. */
+    interface Push<T> {
+        push(value: T): void;
+    }
+    function moduleHasNonRelativeName(moduleName: string): boolean;
+    function getEffectiveTypeRoots(options: CompilerOptions, host: {
+        directoryExists?: (directoryName: string) => boolean;
+        getCurrentDirectory?: () => string;
+    }): string[] | undefined;
+    /**
+     * @param {string | undefined} containingFile - file that contains type reference directive, can be undefined if containing file is unknown.
+     * This is possible in case if resolution is performed for directives specified via 'types' parameter. In this case initial path for secondary lookups
+     * is assumed to be the same as root directory of the project.
+     */
+    function resolveTypeReferenceDirective(typeReferenceDirectiveName: string, containingFile: string | undefined, options: CompilerOptions, host: ModuleResolutionHost): ResolvedTypeReferenceDirectiveWithFailedLookupLocations;
+    /**
+     * Given a set of options, returns the set of type directive names
+     *   that should be included for this program automatically.
+     * This list could either come from the config file,
+     *   or from enumerating the types root + initial secondary types lookup location.
+     * More type directives might appear in the program later as a result of loading actual source files;
+     *   this list is only the set of defaults that are implicitly included.
+     */
+    function getAutomaticTypeDirectiveNames(options: CompilerOptions, host: ModuleResolutionHost): string[];
+    /**
+     * Cached module resolutions per containing directory.
+     * This assumes that any module id will have the same resolution for sibling files located in the same folder.
+     */
+    interface ModuleResolutionCache extends NonRelativeModuleNameResolutionCache {
+        getOrCreateCacheForDirectory(directoryName: string): Map<ResolvedModuleWithFailedLookupLocations>;
+    }
+    /**
+     * Stored map from non-relative module name to a table: directory -> result of module lookup in this directory
+     * We support only non-relative module names because resolution of relative module names is usually more deterministic and thus less expensive.
+     */
+    interface NonRelativeModuleNameResolutionCache {
+        getOrCreateCacheForModuleName(nonRelativeModuleName: string): PerModuleNameCache;
+    }
+    interface PerModuleNameCache {
+        get(directory: string): ResolvedModuleWithFailedLookupLocations;
+        set(directory: string, result: ResolvedModuleWithFailedLookupLocations): void;
+    }
+    function createModuleResolutionCache(currentDirectory: string, getCanonicalFileName: (s: string) => string): ModuleResolutionCache;
+    function resolveModuleName(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost, cache?: ModuleResolutionCache): ResolvedModuleWithFailedLookupLocations;
+    function nodeModuleNameResolver(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost, cache?: ModuleResolutionCache): ResolvedModuleWithFailedLookupLocations;
+    /**
+     * Expose resolution logic to allow us to use Node module resolution logic from arbitrary locations.
+     * No way to do this with `require()`: https://github.com/nodejs/node/issues/5963
+     * Throws an error if the module can't be resolved.
+     */
+    function resolveJavaScriptModule(moduleName: string, initialDir: string, host: ModuleResolutionHost): string;
+    function directoryProbablyExists(directoryName: string, host: {
+        directoryExists?: (directoryName: string) => boolean;
+    }): boolean;
+    function getPackageNameFromAtTypesDirectory(mangledName: string): string;
+    function classicNameResolver(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost, cache?: NonRelativeModuleNameResolutionCache): ResolvedModuleWithFailedLookupLocations;
+    /**
+     * LSHost may load a module from a global cache of typings.
+     * This is the minumum code needed to expose that functionality; the rest is in LSHost.
+     */
+    function loadModuleFromGlobalCache(moduleName: string, projectName: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost, globalCache: string): ResolvedModuleWithFailedLookupLocations;
+}
+declare namespace ts {
+    function getNodeId(node: Node): number;
+    function getSymbolId(symbol: Symbol): number;
+    function isInstantiatedModule(node: ModuleDeclaration, preserveConstEnums: boolean): boolean;
+    function createTypeChecker(host: TypeCheckerHost, produceDiagnostics: boolean): TypeChecker;
+}
+declare namespace ts {
+    const compileOnSaveCommandLineOption: CommandLineOption;
+    const optionDeclarations: CommandLineOption[];
+    const typeAcquisitionDeclarations: CommandLineOption[];
+    interface OptionNameMap {
+        optionNameMap: Map<CommandLineOption>;
+        shortOptionNames: Map<string>;
+    }
+    const defaultInitCompilerOptions: CompilerOptions;
+    function convertEnableAutoDiscoveryToEnable(typeAcquisition: TypeAcquisition): TypeAcquisition;
+    function createCompilerDiagnosticForInvalidCustomType(opt: CommandLineOptionOfCustomType): Diagnostic;
+    function parseCustomTypeOption(opt: CommandLineOptionOfCustomType, value: string, errors: Diagnostic[]): string | number;
+    function parseListTypeOption(opt: CommandLineOptionOfListType, value: string, errors: Diagnostic[]): (string | number)[] | undefined;
+    function parseCommandLine(commandLine: string[], readFile?: (path: string) => string): ParsedCommandLine;
+    /**
+     * Read tsconfig.json file
+     * @param fileName The path to the config file
+     */
+    function readConfigFile(fileName: string, readFile: (path: string) => string): {
+        config?: any;
+        error?: Diagnostic;
+    };
+    /**
+     * Parse the text of the tsconfig.json file
+     * @param fileName The path to the config file
+     * @param jsonText The text of the config file
+     */
+    function parseConfigFileTextToJson(fileName: string, jsonText: string): {
+        config?: any;
+        error?: Diagnostic;
+    };
+    /**
+     * Read tsconfig.json file
+     * @param fileName The path to the config file
+     */
+    function readJsonConfigFile(fileName: string, readFile: (path: string) => string): JsonSourceFile;
+    /**
+     * Convert the json syntax tree into the json value
+     */
+    function convertToObject(sourceFile: JsonSourceFile, errors: Diagnostic[]): any;
+    /**
+     * Generate tsconfig configuration when running command line "--init"
+     * @param options commandlineOptions to be generated into tsconfig.json
+     * @param fileNames array of filenames to be generated into tsconfig.json
+     */
+    function generateTSConfig(options: CompilerOptions, fileNames: string[], newLine: string): string;
+    /**
+     * Parse the contents of a config file (tsconfig.json).
+     * @param json The contents of the config file to parse
+     * @param host Instance of ParseConfigHost used to enumerate files in folder.
+     * @param basePath A root directory to resolve relative path entries in the config
+     *    file to. e.g. outDir
+     */
+    function parseJsonConfigFileContent(json: any, host: ParseConfigHost, basePath: string, existingOptions?: CompilerOptions, configFileName?: string, resolutionStack?: Path[], extraFileExtensions?: JsFileExtensionInfo[]): ParsedCommandLine;
+    /**
+     * Parse the contents of a config file (tsconfig.json).
+     * @param jsonNode The contents of the config file to parse
+     * @param host Instance of ParseConfigHost used to enumerate files in folder.
+     * @param basePath A root directory to resolve relative path entries in the config
+     *    file to. e.g. outDir
+     */
+    function parseJsonSourceFileConfigFileContent(sourceFile: JsonSourceFile, host: ParseConfigHost, basePath: string, existingOptions?: CompilerOptions, configFileName?: string, resolutionStack?: Path[], extraFileExtensions?: JsFileExtensionInfo[]): ParsedCommandLine;
+    function setConfigFileInOptions(options: CompilerOptions, configFile: JsonSourceFile): void;
+    function convertCompilerOptionsFromJson(jsonOptions: any, basePath: string, configFileName?: string): {
+        options: CompilerOptions;
+        errors: Diagnostic[];
+    };
+    function convertTypeAcquisitionFromJson(jsonOptions: any, basePath: string, configFileName?: string): {
+        options: TypeAcquisition;
+        errors: Diagnostic[];
+    };
+    /**
+     * Produces a cleaned version of compiler options with personally identifiying info (aka, paths) removed.
+     * Also converts enum values back to strings.
+     */
+    function convertCompilerOptionsForTelemetry(opts: ts.CompilerOptions): ts.CompilerOptions;
+}
+declare namespace ts {
+    function getDeclarationDiagnostics(host: EmitHost, resolver: EmitResolver, targetSourceFile: SourceFile): Diagnostic[];
+    function writeDeclarationFile(declarationFilePath: string, sourceFileOrBundle: SourceFile | Bundle, host: EmitHost, resolver: EmitResolver, emitterDiagnostics: DiagnosticCollection, emitOnlyDtsFiles: boolean): boolean;
+}
+declare namespace ts {
+    function updateNode<T extends Node>(updated: T, original: T): T;
+    /**
+     * Make `elements` into a `NodeArray<T>`. If `elements` is `undefined`, returns an empty `NodeArray<T>`.
+     */
+    function createNodeArray<T extends Node>(elements?: T[], hasTrailingComma?: boolean): NodeArray<T>;
+    /**
+     * Creates a shallow, memberwise clone of a node with no source map location.
+     */
+    function getSynthesizedClone<T extends Node>(node: T | undefined): T;
+    function createLiteral(value: string): StringLiteral;
+    function createLiteral(value: number): NumericLiteral;
+    function createLiteral(value: boolean): BooleanLiteral;
+    /** Create a string literal whose source text is read from a source node during emit. */
+    function createLiteral(sourceNode: StringLiteral | NumericLiteral | Identifier): StringLiteral;
+    function createLiteral(value: string | number | boolean): PrimaryExpression;
+    function createNumericLiteral(value: string): NumericLiteral;
+    function createIdentifier(text: string): Identifier;
+    function createIdentifier(text: string, typeArguments: TypeNode[]): Identifier;
+    function updateIdentifier(node: Identifier, typeArguments: NodeArray<TypeNode> | undefined): Identifier;
+    /** Create a unique temporary variable. */
+    function createTempVariable(recordTempVariable: ((node: Identifier) => void) | undefined): Identifier;
+    /** Create a unique temporary variable for use in a loop. */
+    function createLoopVariable(): Identifier;
+    /** Create a unique name based on the supplied text. */
+    function createUniqueName(text: string): Identifier;
+    /** Create a unique name generated for a node. */
+    function getGeneratedNameForNode(node: Node): Identifier;
+    function createToken<TKind extends SyntaxKind>(token: TKind): Token<TKind>;
+    function createSuper(): SuperExpression;
+    function createThis(): ThisExpression & Token<SyntaxKind.ThisKeyword>;
+    function createNull(): NullLiteral & Token<SyntaxKind.NullKeyword>;
+    function createTrue(): BooleanLiteral & Token<SyntaxKind.TrueKeyword>;
+    function createFalse(): BooleanLiteral & Token<SyntaxKind.FalseKeyword>;
+    function createQualifiedName(left: EntityName, right: string | Identifier): QualifiedName;
+    function updateQualifiedName(node: QualifiedName, left: EntityName, right: Identifier): QualifiedName;
+    function createComputedPropertyName(expression: Expression): ComputedPropertyName;
+    function updateComputedPropertyName(node: ComputedPropertyName, expression: Expression): ComputedPropertyName;
+    function createTypeParameterDeclaration(name: string | Identifier, constraint?: TypeNode, defaultType?: TypeNode): TypeParameterDeclaration;
+    function updateTypeParameterDeclaration(node: TypeParameterDeclaration, name: Identifier, constraint: TypeNode | undefined, defaultType: TypeNode | undefined): TypeParameterDeclaration;
+    function createParameter(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, dotDotDotToken: DotDotDotToken | undefined, name: string | BindingName, questionToken?: QuestionToken, type?: TypeNode, initializer?: Expression): ParameterDeclaration;
+    function updateParameter(node: ParameterDeclaration, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, dotDotDotToken: DotDotDotToken | undefined, name: string | BindingName, questionToken: QuestionToken | undefined, type: TypeNode | undefined, initializer: Expression | undefined): ParameterDeclaration;
+    function createDecorator(expression: Expression): Decorator;
+    function updateDecorator(node: Decorator, expression: Expression): Decorator;
+    function createPropertySignature(modifiers: Modifier[] | undefined, name: PropertyName | string, questionToken: QuestionToken | undefined, type: TypeNode | undefined, initializer: Expression | undefined): PropertySignature;
+    function updatePropertySignature(node: PropertySignature, modifiers: Modifier[] | undefined, name: PropertyName, questionToken: QuestionToken | undefined, type: TypeNode | undefined, initializer: Expression | undefined): PropertySignature;
+    function createProperty(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: string | PropertyName, questionToken: QuestionToken | undefined, type: TypeNode | undefined, initializer: Expression | undefined): PropertyDeclaration;
+    function updateProperty(node: PropertyDeclaration, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: PropertyName, type: TypeNode | undefined, initializer: Expression | undefined): PropertyDeclaration;
+    function createMethodSignature(typeParameters: TypeParameterDeclaration[] | undefined, parameters: ParameterDeclaration[], type: TypeNode | undefined, name: string | PropertyName, questionToken: QuestionToken | undefined): MethodSignature;
+    function updateMethodSignature(node: MethodSignature, typeParameters: NodeArray<TypeParameterDeclaration> | undefined, parameters: NodeArray<ParameterDeclaration>, type: TypeNode | undefined, name: PropertyName, questionToken: QuestionToken | undefined): MethodSignature;
+    function createMethod(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, asteriskToken: AsteriskToken | undefined, name: string | PropertyName, questionToken: QuestionToken | undefined, typeParameters: TypeParameterDeclaration[] | undefined, parameters: ParameterDeclaration[], type: TypeNode | undefined, body: Block | undefined): MethodDeclaration;
+    function updateMethod(node: MethodDeclaration, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, asteriskToken: AsteriskToken | undefined, name: PropertyName, questionToken: QuestionToken | undefined, typeParameters: TypeParameterDeclaration[] | undefined, parameters: ParameterDeclaration[], type: TypeNode | undefined, body: Block | undefined): MethodDeclaration;
+    function createConstructor(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, parameters: ParameterDeclaration[], body: Block | undefined): ConstructorDeclaration;
+    function updateConstructor(node: ConstructorDeclaration, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, parameters: ParameterDeclaration[], body: Block | undefined): ConstructorDeclaration;
+    function createGetAccessor(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: string | PropertyName, parameters: ParameterDeclaration[], type: TypeNode | undefined, body: Block | undefined): GetAccessorDeclaration;
+    function updateGetAccessor(node: GetAccessorDeclaration, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: PropertyName, parameters: ParameterDeclaration[], type: TypeNode | undefined, body: Block | undefined): GetAccessorDeclaration;
+    function createSetAccessor(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: string | PropertyName, parameters: ParameterDeclaration[], body: Block | undefined): SetAccessorDeclaration;
+    function updateSetAccessor(node: SetAccessorDeclaration, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: PropertyName, parameters: ParameterDeclaration[], body: Block | undefined): SetAccessorDeclaration;
+    function createCallSignature(typeParameters: TypeParameterDeclaration[] | undefined, parameters: ParameterDeclaration[], type: TypeNode | undefined): CallSignatureDeclaration;
+    function updateCallSignature(node: CallSignatureDeclaration, typeParameters: NodeArray<TypeParameterDeclaration> | undefined, parameters: NodeArray<ParameterDeclaration>, type: TypeNode | undefined): CallSignatureDeclaration;
+    function createConstructSignature(typeParameters: TypeParameterDeclaration[] | undefined, parameters: ParameterDeclaration[], type: TypeNode | undefined): ConstructSignatureDeclaration;
+    function updateConstructSignature(node: ConstructSignatureDeclaration, typeParameters: NodeArray<TypeParameterDeclaration> | undefined, parameters: NodeArray<ParameterDeclaration>, type: TypeNode | undefined): ConstructSignatureDeclaration;
+    function createIndexSignature(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, parameters: ParameterDeclaration[], type: TypeNode): IndexSignatureDeclaration;
+    function updateIndexSignature(node: IndexSignatureDeclaration, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, parameters: ParameterDeclaration[], type: TypeNode): IndexSignatureDeclaration;
+    function createSignatureDeclaration(kind: SyntaxKind, typeParameters: TypeParameterDeclaration[] | undefined, parameters: ParameterDeclaration[], type: TypeNode | undefined): SignatureDeclaration;
+    function createKeywordTypeNode(kind: KeywordTypeNode["kind"]): KeywordTypeNode;
+    function createTypePredicateNode(parameterName: Identifier | ThisTypeNode | string, type: TypeNode): TypePredicateNode;
+    function updateTypePredicateNode(node: TypePredicateNode, parameterName: Identifier | ThisTypeNode, type: TypeNode): TypePredicateNode;
+    function createTypeReferenceNode(typeName: string | EntityName, typeArguments: TypeNode[] | undefined): TypeReferenceNode;
+    function updateTypeReferenceNode(node: TypeReferenceNode, typeName: EntityName, typeArguments: NodeArray<TypeNode> | undefined): TypeReferenceNode;
+    function createFunctionTypeNode(typeParameters: TypeParameterDeclaration[] | undefined, parameters: ParameterDeclaration[], type: TypeNode | undefined): FunctionTypeNode;
+    function updateFunctionTypeNode(node: FunctionTypeNode, typeParameters: NodeArray<TypeParameterDeclaration> | undefined, parameters: NodeArray<ParameterDeclaration>, type: TypeNode | undefined): FunctionTypeNode;
+    function createConstructorTypeNode(typeParameters: TypeParameterDeclaration[] | undefined, parameters: ParameterDeclaration[], type: TypeNode | undefined): ConstructorTypeNode;
+    function updateConstructorTypeNode(node: ConstructorTypeNode, typeParameters: NodeArray<TypeParameterDeclaration> | undefined, parameters: NodeArray<ParameterDeclaration>, type: TypeNode | undefined): ConstructorTypeNode;
+    function createTypeQueryNode(exprName: EntityName): TypeQueryNode;
+    function updateTypeQueryNode(node: TypeQueryNode, exprName: EntityName): TypeQueryNode;
+    function createTypeLiteralNode(members: TypeElement[]): TypeLiteralNode;
+    function updateTypeLiteralNode(node: TypeLiteralNode, members: NodeArray<TypeElement>): TypeLiteralNode;
+    function createArrayTypeNode(elementType: TypeNode): ArrayTypeNode;
+    function updateArrayTypeNode(node: ArrayTypeNode, elementType: TypeNode): ArrayTypeNode;
+    function createTupleTypeNode(elementTypes: TypeNode[]): TupleTypeNode;
+    function updateTypleTypeNode(node: TupleTypeNode, elementTypes: TypeNode[]): TupleTypeNode;
+    function createUnionTypeNode(types: TypeNode[]): UnionTypeNode;
+    function updateUnionTypeNode(node: UnionTypeNode, types: NodeArray<TypeNode>): UnionTypeNode;
+    function createIntersectionTypeNode(types: TypeNode[]): IntersectionTypeNode;
+    function updateIntersectionTypeNode(node: IntersectionTypeNode, types: NodeArray<TypeNode>): IntersectionTypeNode;
+    function createUnionOrIntersectionTypeNode(kind: SyntaxKind.UnionType | SyntaxKind.IntersectionType, types: TypeNode[]): UnionOrIntersectionTypeNode;
+    function createParenthesizedType(type: TypeNode): ParenthesizedTypeNode;
+    function updateParenthesizedType(node: ParenthesizedTypeNode, type: TypeNode): ParenthesizedTypeNode;
+    function createThisTypeNode(): ThisTypeNode;
+    function createTypeOperatorNode(type: TypeNode): TypeOperatorNode;
+    function updateTypeOperatorNode(node: TypeOperatorNode, type: TypeNode): TypeOperatorNode;
+    function createIndexedAccessTypeNode(objectType: TypeNode, indexType: TypeNode): IndexedAccessTypeNode;
+    function updateIndexedAccessTypeNode(node: IndexedAccessTypeNode, objectType: TypeNode, indexType: TypeNode): IndexedAccessTypeNode;
+    function createMappedTypeNode(readonlyToken: ReadonlyToken | undefined, typeParameter: TypeParameterDeclaration, questionToken: QuestionToken | undefined, type: TypeNode | undefined): MappedTypeNode;
+    function updateMappedTypeNode(node: MappedTypeNode, readonlyToken: ReadonlyToken | undefined, typeParameter: TypeParameterDeclaration, questionToken: QuestionToken | undefined, type: TypeNode | undefined): MappedTypeNode;
+    function createLiteralTypeNode(literal: Expression): LiteralTypeNode;
+    function updateLiteralTypeNode(node: LiteralTypeNode, literal: Expression): LiteralTypeNode;
+    function createObjectBindingPattern(elements: BindingElement[]): ObjectBindingPattern;
+    function updateObjectBindingPattern(node: ObjectBindingPattern, elements: BindingElement[]): ObjectBindingPattern;
+    function createArrayBindingPattern(elements: ArrayBindingElement[]): ArrayBindingPattern;
+    function updateArrayBindingPattern(node: ArrayBindingPattern, elements: ArrayBindingElement[]): ArrayBindingPattern;
+    function createBindingElement(dotDotDotToken: DotDotDotToken | undefined, propertyName: string | PropertyName | undefined, name: string | BindingName, initializer?: Expression): BindingElement;
+    function updateBindingElement(node: BindingElement, dotDotDotToken: DotDotDotToken | undefined, propertyName: PropertyName | undefined, name: BindingName, initializer: Expression | undefined): BindingElement;
+    function createArrayLiteral(elements?: Expression[], multiLine?: boolean): ArrayLiteralExpression;
+    function updateArrayLiteral(node: ArrayLiteralExpression, elements: Expression[]): ArrayLiteralExpression;
+    function createObjectLiteral(properties?: ObjectLiteralElementLike[], multiLine?: boolean): ObjectLiteralExpression;
+    function updateObjectLiteral(node: ObjectLiteralExpression, properties: ObjectLiteralElementLike[]): ObjectLiteralExpression;
+    function createPropertyAccess(expression: Expression, name: string | Identifier): PropertyAccessExpression;
+    function updatePropertyAccess(node: PropertyAccessExpression, expression: Expression, name: Identifier): PropertyAccessExpression;
+    function createElementAccess(expression: Expression, index: number | Expression): ElementAccessExpression;
+    function updateElementAccess(node: ElementAccessExpression, expression: Expression, argumentExpression: Expression): ElementAccessExpression;
+    function createCall(expression: Expression, typeArguments: TypeNode[] | undefined, argumentsArray: Expression[]): CallExpression;
+    function updateCall(node: CallExpression, expression: Expression, typeArguments: TypeNode[] | undefined, argumentsArray: Expression[]): CallExpression;
+    function createNew(expression: Expression, typeArguments: TypeNode[] | undefined, argumentsArray: Expression[] | undefined): NewExpression;
+    function updateNew(node: NewExpression, expression: Expression, typeArguments: TypeNode[] | undefined, argumentsArray: Expression[] | undefined): NewExpression;
+    function createTaggedTemplate(tag: Expression, template: TemplateLiteral): TaggedTemplateExpression;
+    function updateTaggedTemplate(node: TaggedTemplateExpression, tag: Expression, template: TemplateLiteral): TaggedTemplateExpression;
+    function createTypeAssertion(type: TypeNode, expression: Expression): TypeAssertion;
+    function updateTypeAssertion(node: TypeAssertion, type: TypeNode, expression: Expression): TypeAssertion;
+    function createParen(expression: Expression): ParenthesizedExpression;
+    function updateParen(node: ParenthesizedExpression, expression: Expression): ParenthesizedExpression;
+    function createFunctionExpression(modifiers: Modifier[] | undefined, asteriskToken: AsteriskToken | undefined, name: string | Identifier | undefined, typeParameters: TypeParameterDeclaration[] | undefined, parameters: ParameterDeclaration[], type: TypeNode | undefined, body: Block): FunctionExpression;
+    function updateFunctionExpression(node: FunctionExpression, modifiers: Modifier[] | undefined, asteriskToken: AsteriskToken | undefined, name: Identifier | undefined, typeParameters: TypeParameterDeclaration[] | undefined, parameters: ParameterDeclaration[], type: TypeNode | undefined, body: Block): FunctionExpression;
+    function createArrowFunction(modifiers: Modifier[] | undefined, typeParameters: TypeParameterDeclaration[] | undefined, parameters: ParameterDeclaration[], type: TypeNode | undefined, equalsGreaterThanToken: EqualsGreaterThanToken | undefined, body: ConciseBody): ArrowFunction;
+    function updateArrowFunction(node: ArrowFunction, modifiers: Modifier[] | undefined, typeParameters: TypeParameterDeclaration[] | undefined, parameters: ParameterDeclaration[], type: TypeNode | undefined, body: ConciseBody): ArrowFunction;
+    function createDelete(expression: Expression): DeleteExpression;
+    function updateDelete(node: DeleteExpression, expression: Expression): DeleteExpression;
+    function createTypeOf(expression: Expression): TypeOfExpression;
+    function updateTypeOf(node: TypeOfExpression, expression: Expression): TypeOfExpression;
+    function createVoid(expression: Expression): VoidExpression;
+    function updateVoid(node: VoidExpression, expression: Expression): VoidExpression;
+    function createAwait(expression: Expression): AwaitExpression;
+    function updateAwait(node: AwaitExpression, expression: Expression): AwaitExpression;
+    function createPrefix(operator: PrefixUnaryOperator, operand: Expression): PrefixUnaryExpression;
+    function updatePrefix(node: PrefixUnaryExpression, operand: Expression): PrefixUnaryExpression;
+    function createPostfix(operand: Expression, operator: PostfixUnaryOperator): PostfixUnaryExpression;
+    function updatePostfix(node: PostfixUnaryExpression, operand: Expression): PostfixUnaryExpression;
+    function createBinary(left: Expression, operator: BinaryOperator | BinaryOperatorToken, right: Expression): BinaryExpression;
+    function updateBinary(node: BinaryExpression, left: Expression, right: Expression, operator?: BinaryOperator | BinaryOperatorToken): BinaryExpression;
+    function createConditional(condition: Expression, whenTrue: Expression, whenFalse: Expression): ConditionalExpression;
+    function createConditional(condition: Expression, questionToken: QuestionToken, whenTrue: Expression, colonToken: ColonToken, whenFalse: Expression): ConditionalExpression;
+    function updateConditional(node: ConditionalExpression, condition: Expression, whenTrue: Expression, whenFalse: Expression): ConditionalExpression;
+    function createTemplateExpression(head: TemplateHead, templateSpans: TemplateSpan[]): TemplateExpression;
+    function updateTemplateExpression(node: TemplateExpression, head: TemplateHead, templateSpans: TemplateSpan[]): TemplateExpression;
+    function createYield(expression?: Expression): YieldExpression;
+    function createYield(asteriskToken: AsteriskToken, expression: Expression): YieldExpression;
+    function updateYield(node: YieldExpression, asteriskToken: AsteriskToken | undefined, expression: Expression): YieldExpression;
+    function createSpread(expression: Expression): SpreadElement;
+    function updateSpread(node: SpreadElement, expression: Expression): SpreadElement;
+    function createClassExpression(modifiers: Modifier[] | undefined, name: string | Identifier | undefined, typeParameters: TypeParameterDeclaration[] | undefined, heritageClauses: HeritageClause[], members: ClassElement[]): ClassExpression;
+    function updateClassExpression(node: ClassExpression, modifiers: Modifier[] | undefined, name: Identifier | undefined, typeParameters: TypeParameterDeclaration[] | undefined, heritageClauses: HeritageClause[], members: ClassElement[]): ClassExpression;
+    function createOmittedExpression(): OmittedExpression;
+    function createExpressionWithTypeArguments(typeArguments: TypeNode[], expression: Expression): ExpressionWithTypeArguments;
+    function updateExpressionWithTypeArguments(node: ExpressionWithTypeArguments, typeArguments: TypeNode[], expression: Expression): ExpressionWithTypeArguments;
+    function createAsExpression(expression: Expression, type: TypeNode): AsExpression;
+    function updateAsExpression(node: AsExpression, expression: Expression, type: TypeNode): AsExpression;
+    function createNonNullExpression(expression: Expression): NonNullExpression;
+    function updateNonNullExpression(node: NonNullExpression, expression: Expression): NonNullExpression;
+    function createMetaProperty(keywordToken: MetaProperty["keywordToken"], name: Identifier): MetaProperty;
+    function updateMetaProperty(node: MetaProperty, name: Identifier): MetaProperty;
+    function createTemplateSpan(expression: Expression, literal: TemplateMiddle | TemplateTail): TemplateSpan;
+    function updateTemplateSpan(node: TemplateSpan, expression: Expression, literal: TemplateMiddle | TemplateTail): TemplateSpan;
+    function createSemicolonClassElement(): SemicolonClassElement;
+    function createBlock(statements: Statement[], multiLine?: boolean): Block;
+    function updateBlock(node: Block, statements: Statement[]): Block;
+    function createVariableStatement(modifiers: Modifier[] | undefined, declarationList: VariableDeclarationList | VariableDeclaration[]): VariableStatement;
+    function updateVariableStatement(node: VariableStatement, modifiers: Modifier[] | undefined, declarationList: VariableDeclarationList): VariableStatement;
+    function createEmptyStatement(): EmptyStatement;
+    function createStatement(expression: Expression): ExpressionStatement;
+    function updateStatement(node: ExpressionStatement, expression: Expression): ExpressionStatement;
+    function createIf(expression: Expression, thenStatement: Statement, elseStatement?: Statement): IfStatement;
+    function updateIf(node: IfStatement, expression: Expression, thenStatement: Statement, elseStatement: Statement | undefined): IfStatement;
+    function createDo(statement: Statement, expression: Expression): DoStatement;
+    function updateDo(node: DoStatement, statement: Statement, expression: Expression): DoStatement;
+    function createWhile(expression: Expression, statement: Statement): WhileStatement;
+    function updateWhile(node: WhileStatement, expression: Expression, statement: Statement): WhileStatement;
+    function createFor(initializer: ForInitializer | undefined, condition: Expression | undefined, incrementor: Expression | undefined, statement: Statement): ForStatement;
+    function updateFor(node: ForStatement, initializer: ForInitializer | undefined, condition: Expression | undefined, incrementor: Expression | undefined, statement: Statement): ForStatement;
+    function createForIn(initializer: ForInitializer, expression: Expression, statement: Statement): ForInStatement;
+    function updateForIn(node: ForInStatement, initializer: ForInitializer, expression: Expression, statement: Statement): ForInStatement;
+    function createForOf(awaitModifier: AwaitKeywordToken, initializer: ForInitializer, expression: Expression, statement: Statement): ForOfStatement;
+    function updateForOf(node: ForOfStatement, awaitModifier: AwaitKeywordToken, initializer: ForInitializer, expression: Expression, statement: Statement): ForOfStatement;
+    function createContinue(label?: string | Identifier): ContinueStatement;
+    function updateContinue(node: ContinueStatement, label: Identifier | undefined): ContinueStatement;
+    function createBreak(label?: string | Identifier): BreakStatement;
+    function updateBreak(node: BreakStatement, label: Identifier | undefined): BreakStatement;
+    function createReturn(expression?: Expression): ReturnStatement;
+    function updateReturn(node: ReturnStatement, expression: Expression | undefined): ReturnStatement;
+    function createWith(expression: Expression, statement: Statement): WithStatement;
+    function updateWith(node: WithStatement, expression: Expression, statement: Statement): WithStatement;
+    function createSwitch(expression: Expression, caseBlock: CaseBlock): SwitchStatement;
+    function updateSwitch(node: SwitchStatement, expression: Expression, caseBlock: CaseBlock): SwitchStatement;
+    function createLabel(label: string | Identifier, statement: Statement): LabeledStatement;
+    function updateLabel(node: LabeledStatement, label: Identifier, statement: Statement): LabeledStatement;
+    function createThrow(expression: Expression): ThrowStatement;
+    function updateThrow(node: ThrowStatement, expression: Expression): ThrowStatement;
+    function createTry(tryBlock: Block, catchClause: CatchClause | undefined, finallyBlock: Block | undefined): TryStatement;
+    function updateTry(node: TryStatement, tryBlock: Block, catchClause: CatchClause | undefined, finallyBlock: Block | undefined): TryStatement;
+    function createDebuggerStatement(): DebuggerStatement;
+    function createVariableDeclaration(name: string | BindingName, type?: TypeNode, initializer?: Expression): VariableDeclaration;
+    function updateVariableDeclaration(node: VariableDeclaration, name: BindingName, type: TypeNode | undefined, initializer: Expression | undefined): VariableDeclaration;
+    function createVariableDeclarationList(declarations: VariableDeclaration[], flags?: NodeFlags): VariableDeclarationList;
+    function updateVariableDeclarationList(node: VariableDeclarationList, declarations: VariableDeclaration[]): VariableDeclarationList;
+    function createFunctionDeclaration(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, asteriskToken: AsteriskToken | undefined, name: string | Identifier | undefined, typeParameters: TypeParameterDeclaration[] | undefined, parameters: ParameterDeclaration[], type: TypeNode | undefined, body: Block | undefined): FunctionDeclaration;
+    function updateFunctionDeclaration(node: FunctionDeclaration, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, asteriskToken: AsteriskToken | undefined, name: Identifier | undefined, typeParameters: TypeParameterDeclaration[] | undefined, parameters: ParameterDeclaration[], type: TypeNode | undefined, body: Block | undefined): FunctionDeclaration;
+    function createClassDeclaration(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: string | Identifier | undefined, typeParameters: TypeParameterDeclaration[] | undefined, heritageClauses: HeritageClause[], members: ClassElement[]): ClassDeclaration;
+    function updateClassDeclaration(node: ClassDeclaration, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: Identifier | undefined, typeParameters: TypeParameterDeclaration[] | undefined, heritageClauses: HeritageClause[], members: ClassElement[]): ClassDeclaration;
+    function createInterfaceDeclaration(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: string | Identifier, typeParameters: TypeParameterDeclaration[] | undefined, heritageClauses: HeritageClause[] | undefined, members: TypeElement[]): InterfaceDeclaration;
+    function updateInterfaceDeclaration(node: InterfaceDeclaration, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: Identifier, typeParameters: TypeParameterDeclaration[] | undefined, heritageClauses: HeritageClause[] | undefined, members: TypeElement[]): InterfaceDeclaration;
+    function createTypeAliasDeclaration(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: string | Identifier, typeParameters: TypeParameterDeclaration[] | undefined, type: TypeNode): TypeAliasDeclaration;
+    function updateTypeAliasDeclaration(node: TypeAliasDeclaration, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: Identifier, typeParameters: TypeParameterDeclaration[] | undefined, type: TypeNode): TypeAliasDeclaration;
+    function createEnumDeclaration(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: string | Identifier, members: EnumMember[]): EnumDeclaration;
+    function updateEnumDeclaration(node: EnumDeclaration, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: Identifier, members: EnumMember[]): EnumDeclaration;
+    function createModuleDeclaration(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: ModuleName, body: ModuleBody | undefined, flags?: NodeFlags): ModuleDeclaration;
+    function updateModuleDeclaration(node: ModuleDeclaration, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: ModuleName, body: ModuleBody | undefined): ModuleDeclaration;
+    function createModuleBlock(statements: Statement[]): ModuleBlock;
+    function updateModuleBlock(node: ModuleBlock, statements: Statement[]): ModuleBlock;
+    function createCaseBlock(clauses: CaseOrDefaultClause[]): CaseBlock;
+    function updateCaseBlock(node: CaseBlock, clauses: CaseOrDefaultClause[]): CaseBlock;
+    function createNamespaceExportDeclaration(name: string | Identifier): NamespaceExportDeclaration;
+    function updateNamespaceExportDeclaration(node: NamespaceExportDeclaration, name: Identifier): NamespaceExportDeclaration;
+    function createImportEqualsDeclaration(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: string | Identifier, moduleReference: ModuleReference): ImportEqualsDeclaration;
+    function updateImportEqualsDeclaration(node: ImportEqualsDeclaration, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: Identifier, moduleReference: ModuleReference): ImportEqualsDeclaration;
+    function createImportDeclaration(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, importClause: ImportClause | undefined, moduleSpecifier?: Expression): ImportDeclaration;
+    function updateImportDeclaration(node: ImportDeclaration, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, importClause: ImportClause | undefined, moduleSpecifier: Expression | undefined): ImportDeclaration;
+    function createImportClause(name: Identifier | undefined, namedBindings: NamedImportBindings | undefined): ImportClause;
+    function updateImportClause(node: ImportClause, name: Identifier | undefined, namedBindings: NamedImportBindings | undefined): ImportClause;
+    function createNamespaceImport(name: Identifier): NamespaceImport;
+    function updateNamespaceImport(node: NamespaceImport, name: Identifier): NamespaceImport;
+    function createNamedImports(elements: ImportSpecifier[]): NamedImports;
     function updateNamedImports(node: NamedImports, elements: ImportSpecifier[]): NamedImports;
-    function createImportSpecifier(propertyName: Identifier, name: Identifier, location?: TextRange): ImportSpecifier;
-    function updateImportSpecifier(node: ImportSpecifier, propertyName: Identifier, name: Identifier): ImportSpecifier;
-    function createExportAssignment(decorators: Decorator[], modifiers: Modifier[], isExportEquals: boolean, expression: Expression, location?: TextRange): ExportAssignment;
-    function updateExportAssignment(node: ExportAssignment, decorators: Decorator[], modifiers: Modifier[], expression: Expression): ExportAssignment;
-    function createExportDeclaration(decorators: Decorator[], modifiers: Modifier[], exportClause: NamedExports, moduleSpecifier?: Expression, location?: TextRange): ExportDeclaration;
-    function updateExportDeclaration(node: ExportDeclaration, decorators: Decorator[], modifiers: Modifier[], exportClause: NamedExports, moduleSpecifier: Expression): ExportDeclaration;
-    function createNamedExports(elements: ExportSpecifier[], location?: TextRange): NamedExports;
+    function createImportSpecifier(propertyName: Identifier | undefined, name: Identifier): ImportSpecifier;
+    function updateImportSpecifier(node: ImportSpecifier, propertyName: Identifier | undefined, name: Identifier): ImportSpecifier;
+    function createExportAssignment(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, isExportEquals: boolean, expression: Expression): ExportAssignment;
+    function updateExportAssignment(node: ExportAssignment, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, expression: Expression): ExportAssignment;
+    function createExportDeclaration(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, exportClause: NamedExports | undefined, moduleSpecifier?: Expression): ExportDeclaration;
+    function updateExportDeclaration(node: ExportDeclaration, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, exportClause: NamedExports | undefined, moduleSpecifier: Expression | undefined): ExportDeclaration;
+    function createNamedExports(elements: ExportSpecifier[]): NamedExports;
     function updateNamedExports(node: NamedExports, elements: ExportSpecifier[]): NamedExports;
-    function createExportSpecifier(name: string | Identifier, propertyName?: string | Identifier, location?: TextRange): ExportSpecifier;
-    function updateExportSpecifier(node: ExportSpecifier, name: Identifier, propertyName: Identifier): ExportSpecifier;
-    function createJsxElement(openingElement: JsxOpeningElement, children: JsxChild[], closingElement: JsxClosingElement, location?: TextRange): JsxElement;
+    function createExportSpecifier(propertyName: string | Identifier | undefined, name: string | Identifier): ExportSpecifier;
+    function updateExportSpecifier(node: ExportSpecifier, propertyName: Identifier | undefined, name: Identifier): ExportSpecifier;
+    function createExternalModuleReference(expression: Expression): ExternalModuleReference;
+    function updateExternalModuleReference(node: ExternalModuleReference, expression: Expression): ExternalModuleReference;
+    function createJsxElement(openingElement: JsxOpeningElement, children: JsxChild[], closingElement: JsxClosingElement): JsxElement;
     function updateJsxElement(node: JsxElement, openingElement: JsxOpeningElement, children: JsxChild[], closingElement: JsxClosingElement): JsxElement;
-    function createJsxSelfClosingElement(tagName: JsxTagNameExpression, attributes: JsxAttributeLike[], location?: TextRange): JsxSelfClosingElement;
-    function updateJsxSelfClosingElement(node: JsxSelfClosingElement, tagName: JsxTagNameExpression, attributes: JsxAttributeLike[]): JsxSelfClosingElement;
-    function createJsxOpeningElement(tagName: JsxTagNameExpression, attributes: JsxAttributeLike[], location?: TextRange): JsxOpeningElement;
-    function updateJsxOpeningElement(node: JsxOpeningElement, tagName: JsxTagNameExpression, attributes: JsxAttributeLike[]): JsxOpeningElement;
-    function createJsxClosingElement(tagName: JsxTagNameExpression, location?: TextRange): JsxClosingElement;
+    function createJsxSelfClosingElement(tagName: JsxTagNameExpression, attributes: JsxAttributes): JsxSelfClosingElement;
+    function updateJsxSelfClosingElement(node: JsxSelfClosingElement, tagName: JsxTagNameExpression, attributes: JsxAttributes): JsxSelfClosingElement;
+    function createJsxOpeningElement(tagName: JsxTagNameExpression, attributes: JsxAttributes): JsxOpeningElement;
+    function updateJsxOpeningElement(node: JsxOpeningElement, tagName: JsxTagNameExpression, attributes: JsxAttributes): JsxOpeningElement;
+    function createJsxClosingElement(tagName: JsxTagNameExpression): JsxClosingElement;
     function updateJsxClosingElement(node: JsxClosingElement, tagName: JsxTagNameExpression): JsxClosingElement;
-    function createJsxAttribute(name: Identifier, initializer: StringLiteral | JsxExpression, location?: TextRange): JsxAttribute;
+    function createJsxAttribute(name: Identifier, initializer: StringLiteral | JsxExpression): JsxAttribute;
     function updateJsxAttribute(node: JsxAttribute, name: Identifier, initializer: StringLiteral | JsxExpression): JsxAttribute;
-    function createJsxSpreadAttribute(expression: Expression, location?: TextRange): JsxSpreadAttribute;
+    function createJsxAttributes(properties: JsxAttributeLike[]): JsxAttributes;
+    function updateJsxAttributes(node: JsxAttributes, properties: JsxAttributeLike[]): JsxAttributes;
+    function createJsxSpreadAttribute(expression: Expression): JsxSpreadAttribute;
     function updateJsxSpreadAttribute(node: JsxSpreadAttribute, expression: Expression): JsxSpreadAttribute;
-    function createJsxExpression(expression: Expression, location?: TextRange): JsxExpression;
-    function updateJsxExpression(node: JsxExpression, expression: Expression): JsxExpression;
-    function createHeritageClause(token: SyntaxKind, types: ExpressionWithTypeArguments[], location?: TextRange): HeritageClause;
-    function updateHeritageClause(node: HeritageClause, types: ExpressionWithTypeArguments[]): HeritageClause;
-    function createCaseClause(expression: Expression, statements: Statement[], location?: TextRange): CaseClause;
+    function createJsxExpression(dotDotDotToken: DotDotDotToken | undefined, expression: Expression | undefined): JsxExpression;
+    function updateJsxExpression(node: JsxExpression, expression: Expression | undefined): JsxExpression;
+    function createCaseClause(expression: Expression, statements: Statement[]): CaseClause;
     function updateCaseClause(node: CaseClause, expression: Expression, statements: Statement[]): CaseClause;
-    function createDefaultClause(statements: Statement[], location?: TextRange): DefaultClause;
+    function createDefaultClause(statements: Statement[]): DefaultClause;
     function updateDefaultClause(node: DefaultClause, statements: Statement[]): DefaultClause;
-    function createCatchClause(variableDeclaration: string | VariableDeclaration, block: Block, location?: TextRange): CatchClause;
+    function createHeritageClause(token: HeritageClause["token"], types: ExpressionWithTypeArguments[]): HeritageClause;
+    function updateHeritageClause(node: HeritageClause, types: ExpressionWithTypeArguments[]): HeritageClause;
+    function createCatchClause(variableDeclaration: string | VariableDeclaration, block: Block): CatchClause;
     function updateCatchClause(node: CatchClause, variableDeclaration: VariableDeclaration, block: Block): CatchClause;
-    function createPropertyAssignment(name: string | PropertyName, initializer: Expression, location?: TextRange): PropertyAssignment;
+    function createPropertyAssignment(name: string | PropertyName, initializer: Expression): PropertyAssignment;
     function updatePropertyAssignment(node: PropertyAssignment, name: PropertyName, initializer: Expression): PropertyAssignment;
-    function createShorthandPropertyAssignment(name: string | Identifier, objectAssignmentInitializer: Expression, location?: TextRange): ShorthandPropertyAssignment;
-    function updateShorthandPropertyAssignment(node: ShorthandPropertyAssignment, name: Identifier, objectAssignmentInitializer: Expression): ShorthandPropertyAssignment;
+    function createShorthandPropertyAssignment(name: string | Identifier, objectAssignmentInitializer?: Expression): ShorthandPropertyAssignment;
+    function updateShorthandPropertyAssignment(node: ShorthandPropertyAssignment, name: Identifier, objectAssignmentInitializer: Expression | undefined): ShorthandPropertyAssignment;
+    function createSpreadAssignment(expression: Expression): SpreadAssignment;
+    function updateSpreadAssignment(node: SpreadAssignment, expression: Expression): SpreadAssignment;
+    function createEnumMember(name: string | PropertyName, initializer?: Expression): EnumMember;
+    function updateEnumMember(node: EnumMember, name: PropertyName, initializer: Expression | undefined): EnumMember;
     function updateSourceFileNode(node: SourceFile, statements: Statement[]): SourceFile;
     /**
-     * Creates a synthetic statement to act as a placeholder for a not-emitted statement in
-     * order to preserve comments.
-     *
-     * @param original The original statement.
+     * Creates a shallow, memberwise clone of a node for mutation.
+     */
+    function getMutableClone<T extends Node>(node: T): T;
+    /**
+     * Creates a synthetic statement to act as a placeholder for a not-emitted statement in
+     * order to preserve comments.
+     *
+     * @param original The original statement.
+     */
+    function createNotEmittedStatement(original: Node): NotEmittedStatement;
+    /**
+     * Creates a synthetic element to act as a placeholder for the end of an emitted declaration in
+     * order to properly emit exports.
+     */
+    function createEndOfDeclarationMarker(original: Node): EndOfDeclarationMarker;
+    /**
+     * Creates a synthetic element to act as a placeholder for the beginning of a merged declaration in
+     * order to properly emit exports.
+     */
+    function createMergeDeclarationMarker(original: Node): MergeDeclarationMarker;
+    /**
+     * Creates a synthetic expression to act as a placeholder for a not-emitted expression in
+     * order to preserve comments or sourcemap positions.
+     *
+     * @param expression The inner expression to emit.
+     * @param original The original outer expression.
+     * @param location The location for the expression. Defaults to the positions from "original" if provided.
+     */
+    function createPartiallyEmittedExpression(expression: Expression, original?: Node): PartiallyEmittedExpression;
+    function updatePartiallyEmittedExpression(node: PartiallyEmittedExpression, expression: Expression): PartiallyEmittedExpression;
+    function createCommaList(elements: Expression[]): CommaListExpression;
+    function updateCommaList(node: CommaListExpression, elements: Expression[]): CommaListExpression;
+    function createBundle(sourceFiles: SourceFile[]): Bundle;
+    function updateBundle(node: Bundle, sourceFiles: SourceFile[]): Bundle;
+    function createImmediatelyInvokedFunctionExpression(statements: Statement[]): CallExpression;
+    function createImmediatelyInvokedFunctionExpression(statements: Statement[], param: ParameterDeclaration, paramValue: Expression): CallExpression;
+    function createComma(left: Expression, right: Expression): Expression;
+    function createLessThan(left: Expression, right: Expression): Expression;
+    function createAssignment(left: ObjectLiteralExpression | ArrayLiteralExpression, right: Expression): DestructuringAssignment;
+    function createAssignment(left: Expression, right: Expression): BinaryExpression;
+    function createStrictEquality(left: Expression, right: Expression): BinaryExpression;
+    function createStrictInequality(left: Expression, right: Expression): BinaryExpression;
+    function createAdd(left: Expression, right: Expression): BinaryExpression;
+    function createSubtract(left: Expression, right: Expression): BinaryExpression;
+    function createPostfixIncrement(operand: Expression): PostfixUnaryExpression;
+    function createLogicalAnd(left: Expression, right: Expression): BinaryExpression;
+    function createLogicalOr(left: Expression, right: Expression): BinaryExpression;
+    function createLogicalNot(operand: Expression): PrefixUnaryExpression;
+    function createVoidZero(): VoidExpression;
+    function createExportDefault(expression: Expression): ExportAssignment;
+    function createExternalModuleExport(exportName: Identifier): ExportDeclaration;
+    /**
+     * Clears any EmitNode entries from parse-tree nodes.
+     * @param sourceFile A source file.
+     */
+    function disposeEmitNodes(sourceFile: SourceFile): void;
+    /**
+     * Associates a node with the current transformation, initializing
+     * various transient transformation properties.
+     */
+    function getOrCreateEmitNode(node: Node): EmitNode;
+    function setTextRange<T extends TextRange>(range: T, location: TextRange | undefined): T;
+    /**
+     * Sets flags that control emit behavior of a node.
+     */
+    function setEmitFlags<T extends Node>(node: T, emitFlags: EmitFlags): T;
+    /**
+     * Gets a custom text range to use when emitting source maps.
+     */
+    function getSourceMapRange(node: Node): SourceMapRange;
+    /**
+     * Sets a custom text range to use when emitting source maps.
+     */
+    function setSourceMapRange<T extends Node>(node: T, range: SourceMapRange | undefined): T;
+    /**
+     * Create an external source map source file reference
+     */
+    function createSourceMapSource(fileName: string, text: string, skipTrivia?: (pos: number) => number): SourceMapSource;
+    /**
+     * Gets the TextRange to use for source maps for a token of a node.
+     */
+    function getTokenSourceMapRange(node: Node, token: SyntaxKind): SourceMapRange | undefined;
+    /**
+     * Sets the TextRange to use for source maps for a token of a node.
+     */
+    function setTokenSourceMapRange<T extends Node>(node: T, token: SyntaxKind, range: SourceMapRange | undefined): T;
+    /**
+     * Gets a custom text range to use when emitting comments.
+     */
+    function getCommentRange(node: Node): TextRange;
+    /**
+     * Sets a custom text range to use when emitting comments.
+     */
+    function setCommentRange<T extends Node>(node: T, range: TextRange): T;
+    function getSyntheticLeadingComments(node: Node): SynthesizedComment[] | undefined;
+    function setSyntheticLeadingComments<T extends Node>(node: T, comments: SynthesizedComment[]): T;
+    function addSyntheticLeadingComment<T extends Node>(node: T, kind: SyntaxKind.SingleLineCommentTrivia | SyntaxKind.MultiLineCommentTrivia, text: string, hasTrailingNewLine?: boolean): T;
+    function getSyntheticTrailingComments(node: Node): SynthesizedComment[] | undefined;
+    function setSyntheticTrailingComments<T extends Node>(node: T, comments: SynthesizedComment[]): T;
+    function addSyntheticTrailingComment<T extends Node>(node: T, kind: SyntaxKind.SingleLineCommentTrivia | SyntaxKind.MultiLineCommentTrivia, text: string, hasTrailingNewLine?: boolean): T;
+    /**
+     * Gets the constant value to emit for an expression.
      */
-    function createNotEmittedStatement(original: Node): NotEmittedStatement;
+    function getConstantValue(node: PropertyAccessExpression | ElementAccessExpression): string | number;
     /**
-     * Creates a synthetic expression to act as a placeholder for a not-emitted expression in
-     * order to preserve comments or sourcemap positions.
-     *
-     * @param expression The inner expression to emit.
-     * @param original The original outer expression.
-     * @param location The location for the expression. Defaults to the positions from "original" if provided.
+     * Sets the constant value to emit for an expression.
      */
-    function createPartiallyEmittedExpression(expression: Expression, original?: Node, location?: TextRange): PartiallyEmittedExpression;
-    function updatePartiallyEmittedExpression(node: PartiallyEmittedExpression, expression: Expression): PartiallyEmittedExpression;
-    function createComma(left: Expression, right: Expression): Expression;
-    function createLessThan(left: Expression, right: Expression, location?: TextRange): Expression;
-    function createAssignment(left: Expression, right: Expression, location?: TextRange): BinaryExpression;
-    function createStrictEquality(left: Expression, right: Expression): BinaryExpression;
-    function createStrictInequality(left: Expression, right: Expression): BinaryExpression;
-    function createAdd(left: Expression, right: Expression): BinaryExpression;
-    function createSubtract(left: Expression, right: Expression): BinaryExpression;
-    function createPostfixIncrement(operand: Expression, location?: TextRange): PostfixUnaryExpression;
-    function createLogicalAnd(left: Expression, right: Expression): BinaryExpression;
-    function createLogicalOr(left: Expression, right: Expression): BinaryExpression;
-    function createLogicalNot(operand: Expression): PrefixUnaryExpression;
-    function createVoidZero(): VoidExpression;
+    function setConstantValue(node: PropertyAccessExpression | ElementAccessExpression, value: string | number): PropertyAccessExpression | ElementAccessExpression;
+    /**
+     * Adds an EmitHelper to a node.
+     */
+    function addEmitHelper<T extends Node>(node: T, helper: EmitHelper): T;
+    /**
+     * Add EmitHelpers to a node.
+     */
+    function addEmitHelpers<T extends Node>(node: T, helpers: EmitHelper[] | undefined): T;
+    /**
+     * Removes an EmitHelper from a node.
+     */
+    function removeEmitHelper(node: Node, helper: EmitHelper): boolean;
+    /**
+     * Gets the EmitHelpers of a node.
+     */
+    function getEmitHelpers(node: Node): EmitHelper[] | undefined;
+    /**
+     * Moves matching emit helpers from a source node to a target node.
+     */
+    function moveEmitHelpers(source: Node, target: Node, predicate: (helper: EmitHelper) => boolean): void;
+    function compareEmitHelpers(x: EmitHelper, y: EmitHelper): Comparison;
+    function setOriginalNode<T extends Node>(node: T, original: Node | undefined): T;
+}
+declare namespace ts {
+    const nullTransformationContext: TransformationContext;
+    type TypeOfTag = "undefined" | "number" | "boolean" | "string" | "symbol" | "object" | "function";
+    function createTypeCheck(value: Expression, tag: TypeOfTag): BinaryExpression;
     function createMemberAccessForPropertyName(target: Expression, memberName: PropertyName, location?: TextRange): MemberExpression;
-    function createRestParameter(name: string | Identifier): ParameterDeclaration;
     function createFunctionCall(func: Expression, thisArg: Expression, argumentsList: Expression[], location?: TextRange): CallExpression;
     function createFunctionApply(func: Expression, thisArg: Expression, argumentsExpression: Expression, location?: TextRange): CallExpression;
     function createArraySlice(array: Expression, start?: number | Expression): CallExpression;
     function createArrayConcat(array: Expression, values: Expression[]): CallExpression;
     function createMathPow(left: Expression, right: Expression, location?: TextRange): CallExpression;
-    function createReactCreateElement(reactNamespace: string, tagName: Expression, props: Expression, children: Expression[], parentElement: JsxOpeningLikeElement, location: TextRange): LeftHandSideExpression;
-    function createLetDeclarationList(declarations: VariableDeclaration[], location?: TextRange): VariableDeclarationList;
-    function createConstDeclarationList(declarations: VariableDeclaration[], location?: TextRange): VariableDeclarationList;
-    function createHelperName(externalHelpersModuleName: Identifier | undefined, name: string): Identifier | PropertyAccessExpression;
-    function createExtendsHelper(externalHelpersModuleName: Identifier | undefined, name: Identifier): CallExpression;
-    function createAssignHelper(externalHelpersModuleName: Identifier | undefined, attributesSegments: Expression[]): CallExpression;
-    function createParamHelper(externalHelpersModuleName: Identifier | undefined, expression: Expression, parameterOffset: number, location?: TextRange): CallExpression;
-    function createMetadataHelper(externalHelpersModuleName: Identifier | undefined, metadataKey: string, metadataValue: Expression): CallExpression;
-    function createDecorateHelper(externalHelpersModuleName: Identifier | undefined, decoratorExpressions: Expression[], target: Expression, memberName?: Expression, descriptor?: Expression, location?: TextRange): CallExpression;
-    function createAwaiterHelper(externalHelpersModuleName: Identifier | undefined, hasLexicalArguments: boolean, promiseConstructor: EntityName | Expression, body: Block): CallExpression;
-    function createHasOwnProperty(target: LeftHandSideExpression, propertyName: Expression): CallExpression;
-    function createAdvancedAsyncSuperHelper(): VariableStatement;
-    function createSimpleAsyncSuperHelper(): VariableStatement;
+    function createExpressionForJsxElement(jsxFactoryEntity: EntityName, reactNamespace: string, tagName: Expression, props: Expression, children: Expression[], parentElement: JsxOpeningLikeElement, location: TextRange): LeftHandSideExpression;
+    function getHelperName(name: string): Identifier;
+    function createValuesHelper(context: TransformationContext, expression: Expression, location?: TextRange): CallExpression;
+    function createReadHelper(context: TransformationContext, iteratorRecord: Expression, count: number | undefined, location?: TextRange): CallExpression;
+    function createSpreadHelper(context: TransformationContext, argumentList: Expression[], location?: TextRange): CallExpression;
+    function createForOfBindingStatement(node: ForInitializer, boundValue: Expression): Statement;
+    function insertLeadingStatement(dest: Statement, source: Statement): Block;
+    function restoreEnclosingLabel(node: Statement, outermostLabeledStatement: LabeledStatement, afterRestoreLabelCallback?: (node: LabeledStatement) => void): Statement;
     interface CallBinding {
         target: LeftHandSideExpression;
         thisArg: Expression;
@@ -8347,6 +10888,84 @@ declare namespace ts {
     function createExpressionFromEntityName(node: EntityName | Expression): Expression;
     function createExpressionForPropertyName(memberName: PropertyName): Expression;
     function createExpressionForObjectLiteralElementLike(node: ObjectLiteralExpression, property: ObjectLiteralElementLike, receiver: Expression): Expression;
+    /**
+     * Gets the internal name of a declaration. This is primarily used for declarations that can be
+     * referred to by name in the body of an ES5 class function body. An internal name will *never*
+     * be prefixed with an module or namespace export modifier like "exports." when emitted as an
+     * expression. An internal name will also *never* be renamed due to a collision with a block
+     * scoped variable.
+     *
+     * @param node The declaration.
+     * @param allowComments A value indicating whether comments may be emitted for the name.
+     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
+     */
+    function getInternalName(node: Declaration, allowComments?: boolean, allowSourceMaps?: boolean): Identifier;
+    /**
+     * Gets whether an identifier should only be referred to by its internal name.
+     */
+    function isInternalName(node: Identifier): boolean;
+    /**
+     * Gets the local name of a declaration. This is primarily used for declarations that can be
+     * referred to by name in the declaration's immediate scope (classes, enums, namespaces). A
+     * local name will *never* be prefixed with an module or namespace export modifier like
+     * "exports." when emitted as an expression.
+     *
+     * @param node The declaration.
+     * @param allowComments A value indicating whether comments may be emitted for the name.
+     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
+     */
+    function getLocalName(node: Declaration, allowComments?: boolean, allowSourceMaps?: boolean): Identifier;
+    /**
+     * Gets whether an identifier should only be referred to by its local name.
+     */
+    function isLocalName(node: Identifier): boolean;
+    /**
+     * Gets the export name of a declaration. This is primarily used for declarations that can be
+     * referred to by name in the declaration's immediate scope (classes, enums, namespaces). An
+     * export name will *always* be prefixed with an module or namespace export modifier like
+     * `"exports."` when emitted as an expression if the name points to an exported symbol.
+     *
+     * @param node The declaration.
+     * @param allowComments A value indicating whether comments may be emitted for the name.
+     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
+     */
+    function getExportName(node: Declaration, allowComments?: boolean, allowSourceMaps?: boolean): Identifier;
+    /**
+     * Gets whether an identifier should only be referred to by its export representation if the
+     * name points to an exported symbol.
+     */
+    function isExportName(node: Identifier): boolean;
+    /**
+     * Gets the name of a declaration for use in declarations.
+     *
+     * @param node The declaration.
+     * @param allowComments A value indicating whether comments may be emitted for the name.
+     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
+     */
+    function getDeclarationName(node: Declaration, allowComments?: boolean, allowSourceMaps?: boolean): Identifier;
+    /**
+     * Gets the exported name of a declaration for use in expressions.
+     *
+     * An exported name will *always* be prefixed with an module or namespace export modifier like
+     * "exports." if the name points to an exported symbol.
+     *
+     * @param ns The namespace identifier.
+     * @param node The declaration.
+     * @param allowComments A value indicating whether comments may be emitted for the name.
+     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
+     */
+    function getExternalModuleOrNamespaceExportName(ns: Identifier | undefined, node: Declaration, allowComments?: boolean, allowSourceMaps?: boolean): Identifier | PropertyAccessExpression;
+    /**
+     * Gets a namespace-qualified name for use in expressions.
+     *
+     * @param ns The namespace identifier.
+     * @param name The name.
+     * @param allowComments A value indicating whether comments may be emitted for the name.
+     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
+     */
+    function getNamespaceMemberName(ns: Identifier, name: Identifier, allowComments?: boolean, allowSourceMaps?: boolean): PropertyAccessExpression;
+    function convertToFunctionBody(node: ConciseBody, multiLine?: boolean): Block;
+    function convertFunctionDeclarationToExpression(node: FunctionDeclaration): FunctionExpression;
     /**
      * Add any necessary prologue-directives into target statement-array.
      * The function needs to be called during each transformation step.
@@ -8358,7 +10977,28 @@ declare namespace ts {
      * @param ensureUseStrict: boolean determining whether the function need to add prologue-directives
      * @param visitor: Optional callback used to visit any custom prologue directives.
      */
-    function addPrologueDirectives(target: Statement[], source: Statement[], ensureUseStrict?: boolean, visitor?: (node: Node) => VisitResult<Node>): number;
+    function addPrologue(target: Statement[], source: Statement[], ensureUseStrict?: boolean, visitor?: (node: Node) => VisitResult<Node>): number;
+    /**
+     * Add just the standard (string-expression) prologue-directives into target statement-array.
+     * The function needs to be called during each transformation step.
+     * This function needs to be called whenever we transform the statement
+     * list of a source file, namespace, or function-like body.
+     */
+    function addStandardPrologue(target: Statement[], source: Statement[], ensureUseStrict?: boolean): number;
+    /**
+     * Add just the custom prologue-directives into target statement-array.
+     * The function needs to be called during each transformation step.
+     * This function needs to be called whenever we transform the statement
+     * list of a source file, namespace, or function-like body.
+     */
+    function addCustomPrologue(target: Statement[], source: Statement[], statementOffset: number, visitor?: (node: Node) => VisitResult<Node>): number;
+    function startsWithUseStrict(statements: Statement[]): boolean;
+    /**
+     * Ensures "use strict" directive is added
+     *
+     * @param statements An array of statements
+     */
+    function ensureUseStrict(statements: NodeArray<Statement>): NodeArray<Statement>;
     /**
      * Wraps the operand to a BinaryExpression in parentheses if they are needed to preserve the intended
      * order of operations.
@@ -8369,6 +11009,8 @@ declare namespace ts {
      *                           BinaryExpression.
      */
     function parenthesizeBinaryOperand(binaryOperator: SyntaxKind, operand: Expression, isLeftSideOfBinary: boolean, leftOperand?: Expression): Expression;
+    function parenthesizeForConditionalHead(condition: Expression): Expression;
+    function parenthesizeSubexpressionOfConditionalExpression(e: Expression): Expression;
     /**
      * Wraps an expression in parentheses if it is needed in order to use the expression
      * as the expression of a NewExpression node.
@@ -8385,8 +11027,12 @@ declare namespace ts {
     function parenthesizeForAccess(expression: Expression): LeftHandSideExpression;
     function parenthesizePostfixOperand(operand: Expression): LeftHandSideExpression;
     function parenthesizePrefixOperand(operand: Expression): UnaryExpression;
+    function parenthesizeListElements(elements: NodeArray<Expression>): NodeArray<Expression>;
     function parenthesizeExpressionForList(expression: Expression): Expression;
     function parenthesizeExpressionForExpressionStatement(expression: Expression): Expression;
+    function parenthesizeElementTypeMember(member: TypeNode): TypeNode;
+    function parenthesizeElementTypeMembers(members: TypeNode[]): NodeArray<TypeNode>;
+    function parenthesizeTypeParameters(typeParameters: TypeNode[]): NodeArray<TypeNode>;
     function parenthesizeConciseBody(body: ConciseBody): ConciseBody;
     const enum OuterExpressionKinds {
         Parentheses = 1,
@@ -8394,84 +11040,18 @@ declare namespace ts {
         PartiallyEmittedExpressions = 4,
         All = 7,
     }
+    type OuterExpression = ParenthesizedExpression | TypeAssertion | AsExpression | NonNullExpression | PartiallyEmittedExpression;
+    function isOuterExpression(node: Node, kinds?: OuterExpressionKinds): node is OuterExpression;
     function skipOuterExpressions(node: Expression, kinds?: OuterExpressionKinds): Expression;
     function skipOuterExpressions(node: Node, kinds?: OuterExpressionKinds): Node;
     function skipParentheses(node: Expression): Expression;
     function skipParentheses(node: Node): Node;
     function skipAssertions(node: Expression): Expression;
     function skipAssertions(node: Node): Node;
-    function skipPartiallyEmittedExpressions(node: Expression): Expression;
-    function skipPartiallyEmittedExpressions(node: Node): Node;
+    function recreateOuterExpressions(outerExpression: Expression | undefined, innerExpression: Expression, kinds?: OuterExpressionKinds): Expression;
     function startOnNewLine<T extends Node>(node: T): T;
-    function setOriginalNode<T extends Node>(node: T, original: Node): T;
-    /**
-     * Clears any EmitNode entries from parse-tree nodes.
-     * @param sourceFile A source file.
-     */
-    function disposeEmitNodes(sourceFile: SourceFile): void;
-    /**
-     * Gets flags that control emit behavior of a node.
-     *
-     * @param node The node.
-     */
-    function getEmitFlags(node: Node): EmitFlags;
-    /**
-     * Sets flags that control emit behavior of a node.
-     *
-     * @param node The node.
-     * @param emitFlags The NodeEmitFlags for the node.
-     */
-    function setEmitFlags<T extends Node>(node: T, emitFlags: EmitFlags): T;
-    /**
-     * Sets a custom text range to use when emitting source maps.
-     *
-     * @param node The node.
-     * @param range The text range.
-     */
-    function setSourceMapRange<T extends Node>(node: T, range: TextRange): T;
-    /**
-     * Sets the TextRange to use for source maps for a token of a node.
-     *
-     * @param node The node.
-     * @param token The token.
-     * @param range The text range.
-     */
-    function setTokenSourceMapRange<T extends Node>(node: T, token: SyntaxKind, range: TextRange): T;
-    /**
-     * Sets a custom text range to use when emitting comments.
-     */
-    function setCommentRange<T extends Node>(node: T, range: TextRange): T;
-    /**
-     * Gets a custom text range to use when emitting comments.
-     *
-     * @param node The node.
-     */
-    function getCommentRange(node: Node): TextRange;
-    /**
-     * Gets a custom text range to use when emitting source maps.
-     *
-     * @param node The node.
-     */
-    function getSourceMapRange(node: Node): TextRange;
-    /**
-     * Gets the TextRange to use for source maps for a token of a node.
-     *
-     * @param node The node.
-     * @param token The token.
-     */
-    function getTokenSourceMapRange(node: Node, token: SyntaxKind): TextRange;
-    /**
-     * Gets the constant value to emit for an expression.
-     */
-    function getConstantValue(node: PropertyAccessExpression | ElementAccessExpression): number;
-    /**
-     * Sets the constant value to emit for an expression.
-     */
-    function setConstantValue(node: PropertyAccessExpression | ElementAccessExpression, value: number): PropertyAccessExpression | ElementAccessExpression;
-    function setTextRange<T extends TextRange>(node: T, location: TextRange): T;
-    function setNodeFlags<T extends Node>(node: T, flags: NodeFlags): T;
-    function setMultiLine<T extends ObjectLiteralExpression | ArrayLiteralExpression | Block>(node: T, multiLine: boolean): T;
-    function setHasTrailingComma<T extends Node>(nodes: NodeArray<T>, hasTrailingComma: boolean): NodeArray<T>;
+    function getExternalHelpersModuleName(node: SourceFile): Identifier;
+    function getOrCreateExternalHelpersModuleNameIfNeeded(node: SourceFile, compilerOptions: CompilerOptions, hasExportStarsToExportValues?: boolean): Identifier;
     /**
      * Get the name of that target module from an import or export declaration
      */
@@ -8493,164 +11073,62 @@ declare namespace ts {
      * Otherwise, a new StringLiteral node representing the module name will be returned.
      */
     function tryGetModuleNameFromFile(file: SourceFile, host: EmitHost, options: CompilerOptions): StringLiteral;
-}
-declare namespace ts {
-    function createNode(kind: SyntaxKind, pos?: number, end?: number): Node;
-    function forEachChild<T>(node: Node, cbNode: (node: Node) => T, cbNodeArray?: (nodes: Node[]) => T): T;
-    function createSourceFile(fileName: string, sourceText: string, languageVersion: ScriptTarget, setParentNodes?: boolean, scriptKind?: ScriptKind): SourceFile;
-    function isExternalModule(file: SourceFile): boolean;
-    function updateSourceFile(sourceFile: SourceFile, newText: string, textChangeRange: TextChangeRange, aggressiveChecks?: boolean): SourceFile;
-    function parseIsolatedJSDocComment(content: string, start?: number, length?: number): {
-        jsDoc: JSDoc;
-        diagnostics: Diagnostic[];
-    };
-    function parseJSDocTypeExpressionForTests(content: string, start?: number, length?: number): {
-        jsDocTypeExpression: JSDocTypeExpression;
-        diagnostics: Diagnostic[];
-    };
-}
-declare namespace ts {
-    const enum ModuleInstanceState {
-        NonInstantiated = 0,
-        Instantiated = 1,
-        ConstEnumOnly = 2,
-    }
-    function getModuleInstanceState(node: Node): ModuleInstanceState;
-    function bindSourceFile(file: SourceFile, options: CompilerOptions): void;
     /**
-     * Computes the transform flags for a node, given the transform flags of its subtree
-     *
-     * @param node The node to analyze
-     * @param subtreeFlags Transform flags computed for this node's subtree
+     * Gets the initializer of an BindingOrAssignmentElement.
      */
-    function computeTransformFlagsForNode(node: Node, subtreeFlags: TransformFlags): TransformFlags;
-}
-declare namespace ts {
-    function trace(host: ModuleResolutionHost, message: DiagnosticMessage, ...args: any[]): void;
-    function isTraceEnabled(compilerOptions: CompilerOptions, host: ModuleResolutionHost): boolean;
-    function createResolvedModule(resolvedFileName: string, isExternalLibraryImport: boolean, failedLookupLocations: string[]): ResolvedModuleWithFailedLookupLocations;
-    interface ModuleResolutionState {
-        host: ModuleResolutionHost;
-        compilerOptions: CompilerOptions;
-        traceEnabled: boolean;
-        skipTsx: boolean;
-    }
-    function getEffectiveTypeRoots(options: CompilerOptions, host: {
-        directoryExists?: (directoryName: string) => boolean;
-        getCurrentDirectory?: () => string;
-    }): string[] | undefined;
+    function getInitializerOfBindingOrAssignmentElement(bindingElement: BindingOrAssignmentElement): Expression | undefined;
     /**
-     * @param {string | undefined} containingFile - file that contains type reference directive, can be undefined if containing file is unknown.
-     * This is possible in case if resolution is performed for directives specified via 'types' parameter. In this case initial path for secondary lookups
-     * is assumed to be the same as root directory of the project.
+     * Gets the name of an BindingOrAssignmentElement.
      */
-    function resolveTypeReferenceDirective(typeReferenceDirectiveName: string, containingFile: string, options: CompilerOptions, host: ModuleResolutionHost): ResolvedTypeReferenceDirectiveWithFailedLookupLocations;
-    /**
-      * Given a set of options, returns the set of type directive names
-      *   that should be included for this program automatically.
-      * This list could either come from the config file,
-      *   or from enumerating the types root + initial secondary types lookup location.
-      * More type directives might appear in the program later as a result of loading actual source files;
-      *   this list is only the set of defaults that are implicitly included.
-      */
-    function getAutomaticTypeDirectiveNames(options: CompilerOptions, host: ModuleResolutionHost): string[];
-    function resolveModuleName(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost): ResolvedModuleWithFailedLookupLocations;
-    function nodeModuleNameResolver(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost): ResolvedModuleWithFailedLookupLocations;
-    function directoryProbablyExists(directoryName: string, host: {
-        directoryExists?: (directoryName: string) => boolean;
-    }): boolean;
-    function loadModuleFromNodeModules(moduleName: string, directory: string, failedLookupLocations: string[], state: ModuleResolutionState, checkOneLevel: boolean): string;
-    function classicNameResolver(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost): ResolvedModuleWithFailedLookupLocations;
-}
-declare namespace ts {
-    function getNodeId(node: Node): number;
-    function getSymbolId(symbol: Symbol): number;
-    function createTypeChecker(host: TypeCheckerHost, produceDiagnostics: boolean): TypeChecker;
-}
-declare namespace ts {
-    const compileOnSaveCommandLineOption: CommandLineOption;
-    const optionDeclarations: CommandLineOption[];
-    let typingOptionDeclarations: CommandLineOption[];
-    interface OptionNameMap {
-        optionNameMap: Map<CommandLineOption>;
-        shortOptionNames: Map<string>;
-    }
-    const defaultInitCompilerOptions: CompilerOptions;
-    function getOptionNameMap(): OptionNameMap;
-    function createCompilerDiagnosticForInvalidCustomType(opt: CommandLineOptionOfCustomType): Diagnostic;
-    function parseCustomTypeOption(opt: CommandLineOptionOfCustomType, value: string, errors: Diagnostic[]): string | number;
-    function parseListTypeOption(opt: CommandLineOptionOfListType, value: string, errors: Diagnostic[]): (string | number)[] | undefined;
-    function parseCommandLine(commandLine: string[], readFile?: (path: string) => string): ParsedCommandLine;
-    /**
-      * Read tsconfig.json file
-      * @param fileName The path to the config file
-      */
-    function readConfigFile(fileName: string, readFile: (path: string) => string): {
-        config?: any;
-        error?: Diagnostic;
-    };
+    function getTargetOfBindingOrAssignmentElement(bindingElement: BindingOrAssignmentElement): BindingOrAssignmentElementTarget;
     /**
-      * Parse the text of the tsconfig.json file
-      * @param fileName The path to the config file
-      * @param jsonText The text of the config file
-      */
-    function parseConfigFileTextToJson(fileName: string, jsonText: string, stripComments?: boolean): {
-        config?: any;
-        error?: Diagnostic;
-    };
+     * Determines whether an BindingOrAssignmentElement is a rest element.
+     */
+    function getRestIndicatorOfBindingOrAssignmentElement(bindingElement: BindingOrAssignmentElement): BindingOrAssignmentElementRestIndicator;
     /**
-     * Generate tsconfig configuration when running command line "--init"
-     * @param options commandlineOptions to be generated into tsconfig.json
-     * @param fileNames array of filenames to be generated into tsconfig.json
+     * Gets the property name of a BindingOrAssignmentElement
      */
-    function generateTSConfig(options: CompilerOptions, fileNames: string[]): {
-        compilerOptions: Map<CompilerOptionsValue>;
-    };
+    function getPropertyNameOfBindingOrAssignmentElement(bindingElement: BindingOrAssignmentElement): PropertyName;
     /**
-      * Parse the contents of a config file (tsconfig.json).
-      * @param json The contents of the config file to parse
-      * @param host Instance of ParseConfigHost used to enumerate files in folder.
-      * @param basePath A root directory to resolve relative path entries in the config
-      *    file to. e.g. outDir
-      */
-    function parseJsonConfigFileContent(json: any, host: ParseConfigHost, basePath: string, existingOptions?: CompilerOptions, configFileName?: string, resolutionStack?: Path[]): ParsedCommandLine;
-    function convertCompileOnSaveOptionFromJson(jsonOption: any, basePath: string, errors: Diagnostic[]): boolean;
-    function convertCompilerOptionsFromJson(jsonOptions: any, basePath: string, configFileName?: string): {
-        options: CompilerOptions;
-        errors: Diagnostic[];
-    };
-    function convertTypingOptionsFromJson(jsonOptions: any, basePath: string, configFileName?: string): {
-        options: TypingOptions;
-        errors: Diagnostic[];
-    };
-}
-declare namespace ts {
-    function getDeclarationDiagnostics(host: EmitHost, resolver: EmitResolver, targetSourceFile: SourceFile): Diagnostic[];
-    function writeDeclarationFile(declarationFilePath: string, sourceFiles: SourceFile[], isBundledEmit: boolean, host: EmitHost, resolver: EmitResolver, emitterDiagnostics: DiagnosticCollection, emitOnlyDtsFiles: boolean): boolean;
+     * Gets the elements of a BindingOrAssignmentPattern
+     */
+    function getElementsOfBindingOrAssignmentPattern(name: BindingOrAssignmentPattern): BindingOrAssignmentElement[];
+    function convertToArrayAssignmentElement(element: BindingOrAssignmentElement): Expression;
+    function convertToObjectAssignmentElement(element: BindingOrAssignmentElement): ObjectLiteralElementLike;
+    function convertToAssignmentPattern(node: BindingOrAssignmentPattern): AssignmentPattern;
+    function convertToObjectAssignmentPattern(node: ObjectBindingOrAssignmentPattern): ObjectLiteralExpression;
+    function convertToArrayAssignmentPattern(node: ArrayBindingOrAssignmentPattern): ArrayLiteralExpression;
+    function convertToAssignmentElementTarget(node: BindingOrAssignmentElementTarget): Expression;
 }
 declare namespace ts {
-    type VisitResult<T extends Node> = T | T[];
     /**
-     * Similar to `reduceLeft`, performs a reduction against each child of a node.
-     * NOTE: Unlike `forEachChild`, this does *not* visit every node. Only nodes added to the
-     *       `nodeEdgeTraversalMap` above will be visited.
+     * Visits a Node using the supplied visitor, possibly returning a new Node in its place.
      *
-     * @param node The node containing the children to reduce.
-     * @param f The callback function
-     * @param initial The initial value to supply to the reduction.
+     * @param node The Node to visit.
+     * @param visitor The callback used to visit the Node.
+     * @param test A callback to execute to verify the Node is valid.
+     * @param lift An optional callback to execute to lift a NodeArray into a valid Node.
      */
-    function reduceEachChild<T>(node: Node, f: (memo: T, node: Node) => T, initial: T): T;
+    function visitNode<T extends Node>(node: T, visitor: Visitor, test?: (node: Node) => boolean, lift?: (node: NodeArray<Node>) => T): T;
     /**
      * Visits a Node using the supplied visitor, possibly returning a new Node in its place.
      *
      * @param node The Node to visit.
      * @param visitor The callback used to visit the Node.
      * @param test A callback to execute to verify the Node is valid.
-     * @param optional An optional value indicating whether the Node is itself optional.
-     * @param lift An optional callback to execute to lift a NodeArrayNode into a valid Node.
+     * @param lift An optional callback to execute to lift a NodeArray into a valid Node.
+     */
+    function visitNode<T extends Node>(node: T | undefined, visitor: Visitor, test?: (node: Node) => boolean, lift?: (node: NodeArray<Node>) => T): T | undefined;
+    /**
+     * Visits a NodeArray using the supplied visitor, possibly returning a new NodeArray in its place.
+     *
+     * @param nodes The NodeArray to visit.
+     * @param visitor The callback used to visit a Node.
+     * @param test A node test to execute for each node.
+     * @param start An optional value indicating the starting offset at which to start visiting.
+     * @param count An optional value indicating the maximum number of nodes to visit.
      */
-    function visitNode<T extends Node>(node: T, visitor: (node: Node) => VisitResult<Node>, test: (node: Node) => boolean, optional?: boolean, lift?: (node: NodeArray<Node>) => T): T;
-    function visitNode<T extends Node>(node: T, visitor: (node: Node) => VisitResult<Node>, test: (node: Node) => boolean, optional: boolean, lift: (node: NodeArray<Node>) => T, parenthesize: (node: Node, parentNode: Node) => Node, parentNode: Node): T;
+    function visitNodes<T extends Node>(nodes: NodeArray<T>, visitor: Visitor, test?: (node: Node) => boolean, start?: number, count?: number): NodeArray<T>;
     /**
      * Visits a NodeArray using the supplied visitor, possibly returning a new NodeArray in its place.
      *
@@ -8660,8 +11138,32 @@ declare namespace ts {
      * @param start An optional value indicating the starting offset at which to start visiting.
      * @param count An optional value indicating the maximum number of nodes to visit.
      */
-    function visitNodes<T extends Node>(nodes: NodeArray<T>, visitor: (node: Node) => VisitResult<Node>, test: (node: Node) => boolean, start?: number, count?: number): NodeArray<T>;
-    function visitNodes<T extends Node>(nodes: NodeArray<T>, visitor: (node: Node) => VisitResult<Node>, test: (node: Node) => boolean, start: number, count: number, parenthesize: (node: Node, parentNode: Node) => Node, parentNode: Node): NodeArray<T>;
+    function visitNodes<T extends Node>(nodes: NodeArray<T> | undefined, visitor: Visitor, test?: (node: Node) => boolean, start?: number, count?: number): NodeArray<T> | undefined;
+    /**
+     * Starts a new lexical environment and visits a statement list, ending the lexical environment
+     * and merging hoisted declarations upon completion.
+     */
+    function visitLexicalEnvironment(statements: NodeArray<Statement>, visitor: Visitor, context: TransformationContext, start?: number, ensureUseStrict?: boolean): NodeArray<Statement>;
+    /**
+     * Starts a new lexical environment and visits a parameter list, suspending the lexical
+     * environment upon completion.
+     */
+    function visitParameterList(nodes: NodeArray<ParameterDeclaration>, visitor: Visitor, context: TransformationContext, nodesVisitor?: typeof visitNodes): NodeArray<ParameterDeclaration>;
+    /**
+     * Resumes a suspended lexical environment and visits a function body, ending the lexical
+     * environment and merging hoisted declarations upon completion.
+     */
+    function visitFunctionBody(node: FunctionBody, visitor: Visitor, context: TransformationContext): FunctionBody;
+    /**
+     * Resumes a suspended lexical environment and visits a function body, ending the lexical
+     * environment and merging hoisted declarations upon completion.
+     */
+    function visitFunctionBody(node: FunctionBody | undefined, visitor: Visitor, context: TransformationContext): FunctionBody | undefined;
+    /**
+     * Resumes a suspended lexical environment and visits a concise body, ending the lexical
+     * environment and merging hoisted declarations upon completion.
+     */
+    function visitFunctionBody(node: ConciseBody, visitor: Visitor, context: TransformationContext): ConciseBody;
     /**
      * Visits each child of a Node using the supplied visitor, possibly returning a new Node of the same kind in its place.
      *
@@ -8669,21 +11171,34 @@ declare namespace ts {
      * @param visitor The callback used to visit each child.
      * @param context A lexical environment context for the visitor.
      */
-    function visitEachChild<T extends Node>(node: T, visitor: (node: Node) => VisitResult<Node>, context: LexicalEnvironment): T;
+    function visitEachChild<T extends Node>(node: T, visitor: Visitor, context: TransformationContext): T;
     /**
-     * Merges generated lexical declarations into the FunctionBody of a non-arrow function-like declaration.
+     * Visits each child of a Node using the supplied visitor, possibly returning a new Node of the same kind in its place.
      *
-     * @param node The ConciseBody of an arrow function.
-     * @param declarations The lexical declarations to merge.
+     * @param node The Node whose children will be visited.
+     * @param visitor The callback used to visit each child.
+     * @param context A lexical environment context for the visitor.
      */
-    function mergeFunctionBodyLexicalEnvironment(body: FunctionBody, declarations: Statement[]): FunctionBody;
+    function visitEachChild<T extends Node>(node: T | undefined, visitor: Visitor, context: TransformationContext, nodesVisitor?: typeof visitNodes, tokenVisitor?: Visitor): T | undefined;
+}
+declare namespace ts {
     /**
-     * Merges generated lexical declarations into the ConciseBody of an ArrowFunction.
+     * Similar to `reduceLeft`, performs a reduction against each child of a node.
+     * NOTE: Unlike `forEachChild`, this does *not* visit every node.
      *
-     * @param node The ConciseBody of an arrow function.
-     * @param declarations The lexical declarations to merge.
+     * @param node The node containing the children to reduce.
+     * @param initial The initial value to supply to the reduction.
+     * @param f The callback function
+     */
+    function reduceEachChild<T>(node: Node, initial: T, cbNode: (memo: T, node: Node) => T, cbNodeArray?: (memo: T, nodes: NodeArray<Node>) => T): T;
+    /**
+     * Merges generated lexical declarations into a new statement list.
+     */
+    function mergeLexicalEnvironment(statements: NodeArray<Statement>, declarations: Statement[]): NodeArray<Statement>;
+    /**
+     * Appends generated lexical declarations to an array of statements.
      */
-    function mergeFunctionBodyLexicalEnvironment(body: ConciseBody, declarations: Statement[]): ConciseBody;
+    function mergeLexicalEnvironment(statements: Statement[], declarations: Statement[]): Statement[];
     /**
      * Lifts a NodeArray containing only Statement nodes to a block.
      *
@@ -8695,63 +11210,93 @@ declare namespace ts {
      */
     function aggregateTransformFlags<T extends Node>(node: T): T;
     namespace Debug {
-        const failNotOptional: (message?: string) => void;
         const failBadSyntaxKind: (node: Node, message?: string) => void;
+        const assertEachNode: (nodes: Node[], test: (node: Node) => boolean, message?: string) => void;
         const assertNode: (node: Node, test: (node: Node) => boolean, message?: string) => void;
+        const assertOptionalNode: (node: Node, test: (node: Node) => boolean, message?: string) => void;
+        const assertOptionalToken: (node: Node, kind: SyntaxKind, message?: string) => void;
+        const assertMissingNode: (node: Node, message?: string) => void;
+        /**
+         * Injects debug information into frequently used types.
+         */
+        function enableDebugInfo(): void;
+    }
+}
+declare namespace ts {
+    function getOriginalNodeId(node: Node): number;
+    interface ExternalModuleInfo {
+        externalImports: (ImportDeclaration | ImportEqualsDeclaration | ExportDeclaration)[];
+        externalHelpersImportDeclaration: ImportDeclaration | undefined;
+        exportSpecifiers: Map<ExportSpecifier[]>;
+        exportedBindings: Identifier[][];
+        exportedNames: Identifier[];
+        exportEquals: ExportAssignment | undefined;
+        hasExportStarsToExportValues: boolean;
     }
+    function collectExternalModuleInfo(sourceFile: SourceFile, resolver: EmitResolver, compilerOptions: CompilerOptions): ExternalModuleInfo;
 }
 declare namespace ts {
+    const enum FlattenLevel {
+        All = 0,
+        ObjectRest = 1,
+    }
     /**
-     * Flattens a destructuring assignment expression.
-     *
-     * @param root The destructuring assignment expression.
-     * @param needsValue Indicates whether the value from the right-hand-side of the
-     *                   destructuring assignment is needed as part of a larger expression.
-     * @param recordTempVariable A callback used to record new temporary variables.
-     * @param visitor An optional visitor to use to visit expressions.
-     */
-    function flattenDestructuringAssignment(context: TransformationContext, node: BinaryExpression, needsValue: boolean, recordTempVariable: (node: Identifier) => void, visitor?: (node: Node) => VisitResult<Node>): Expression;
-    /**
-     * Flattens binding patterns in a parameter declaration.
-     *
-     * @param node The ParameterDeclaration to flatten.
-     * @param value The rhs value for the binding pattern.
-     * @param visitor An optional visitor to use to visit expressions.
-     */
-    function flattenParameterDestructuring(context: TransformationContext, node: ParameterDeclaration, value: Expression, visitor?: (node: Node) => VisitResult<Node>): VariableDeclaration[];
-    /**
-     * Flattens binding patterns in a variable declaration.
+     * Flattens a DestructuringAssignment or a VariableDeclaration to an expression.
      *
-     * @param node The VariableDeclaration to flatten.
-     * @param value An optional rhs value for the binding pattern.
-     * @param visitor An optional visitor to use to visit expressions.
+     * @param node The node to flatten.
+     * @param visitor An optional visitor used to visit initializers.
+     * @param context The transformation context.
+     * @param level Indicates the extent to which flattening should occur.
+     * @param needsValue An optional value indicating whether the value from the right-hand-side of
+     * the destructuring assignment is needed as part of a larger expression.
+     * @param createAssignmentCallback An optional callback used to create the assignment expression.
      */
-    function flattenVariableDestructuring(context: TransformationContext, node: VariableDeclaration, value?: Expression, visitor?: (node: Node) => VisitResult<Node>, recordTempVariable?: (node: Identifier) => void): VariableDeclaration[];
+    function flattenDestructuringAssignment(node: VariableDeclaration | DestructuringAssignment, visitor: ((node: Node) => VisitResult<Node>) | undefined, context: TransformationContext, level: FlattenLevel, needsValue?: boolean, createAssignmentCallback?: (name: Identifier, value: Expression, location?: TextRange) => Expression): Expression;
     /**
-     * Flattens binding patterns in a variable declaration and transforms them into an expression.
+     * Flattens a VariableDeclaration or ParameterDeclaration to one or more variable declarations.
      *
-     * @param node The VariableDeclaration to flatten.
-     * @param recordTempVariable A callback used to record new temporary variables.
-     * @param nameSubstitution An optional callback used to substitute binding names.
-     * @param visitor An optional visitor to use to visit expressions.
+     * @param node The node to flatten.
+     * @param visitor An optional visitor used to visit initializers.
+     * @param context The transformation context.
+     * @param boundValue The value bound to the declaration.
+     * @param skipInitializer A value indicating whether to ignore the initializer of `node`.
+     * @param hoistTempVariables Indicates whether temporary variables should not be recorded in-line.
+     * @param level Indicates the extent to which flattening should occur.
      */
-    function flattenVariableDestructuringToExpression(context: TransformationContext, node: VariableDeclaration, recordTempVariable: (name: Identifier) => void, nameSubstitution?: (name: Identifier) => Expression, visitor?: (node: Node) => VisitResult<Node>): Expression;
+    function flattenDestructuringBinding(node: VariableDeclaration | ParameterDeclaration, visitor: (node: Node) => VisitResult<Node>, context: TransformationContext, level: FlattenLevel, rval?: Expression, hoistTempVariables?: boolean, skipInitializer?: boolean): VariableDeclaration[];
 }
 declare namespace ts {
     function transformTypeScript(context: TransformationContext): (node: SourceFile) => SourceFile;
 }
+declare namespace ts {
+    function transformES2017(context: TransformationContext): (node: SourceFile) => SourceFile;
+    const asyncSuperHelper: EmitHelper;
+    const advancedAsyncSuperHelper: EmitHelper;
+}
+declare namespace ts {
+    function transformESNext(context: TransformationContext): (node: SourceFile) => SourceFile;
+    function createAssignHelper(context: TransformationContext, attributesSegments: Expression[]): CallExpression;
+}
 declare namespace ts {
     function transformJsx(context: TransformationContext): (node: SourceFile) => SourceFile;
 }
 declare namespace ts {
-    function transformES7(context: TransformationContext): (node: SourceFile) => SourceFile;
+    function transformES2016(context: TransformationContext): (node: SourceFile) => SourceFile;
 }
 declare namespace ts {
-    function transformES6(context: TransformationContext): (node: SourceFile) => SourceFile;
+    function transformES2015(context: TransformationContext): (node: SourceFile) => SourceFile;
 }
 declare namespace ts {
     function transformGenerators(context: TransformationContext): (node: SourceFile) => SourceFile;
 }
+declare namespace ts {
+    /**
+     * Transforms ES5 syntax into ES3 syntax.
+     *
+     * @param context Context and state information for the transformation.
+     */
+    function transformES5(context: TransformationContext): (node: SourceFile) => SourceFile;
+}
 declare namespace ts {
     function transformModule(context: TransformationContext): (node: SourceFile) => SourceFile;
 }
@@ -8759,83 +11304,21 @@ declare namespace ts {
     function transformSystemModule(context: TransformationContext): (node: SourceFile) => SourceFile;
 }
 declare namespace ts {
-    function transformES6Module(context: TransformationContext): (node: SourceFile) => SourceFile;
+    function transformES2015Module(context: TransformationContext): (node: SourceFile) => SourceFile;
 }
 declare namespace ts {
-    interface TransformationResult {
-        /**
-         * Gets the transformed source files.
-         */
-        transformed: SourceFile[];
-        /**
-         * Emits the substitute for a node, if one is available; otherwise, emits the node.
-         *
-         * @param emitContext The current emit context.
-         * @param node The node to substitute.
-         * @param emitCallback A callback used to emit the node or its substitute.
-         */
-        emitNodeWithSubstitution(emitContext: EmitContext, node: Node, emitCallback: (emitContext: EmitContext, node: Node) => void): void;
-        /**
-         * Emits a node with possible notification.
-         *
-         * @param emitContext The current emit context.
-         * @param node The node to emit.
-         * @param emitCallback A callback used to emit the node.
-         */
-        emitNodeWithNotification(emitContext: EmitContext, node: Node, emitCallback: (emitContext: EmitContext, node: Node) => void): void;
-    }
-    interface TransformationContext extends LexicalEnvironment {
-        getCompilerOptions(): CompilerOptions;
-        getEmitResolver(): EmitResolver;
-        getEmitHost(): EmitHost;
-        /**
-         * Hoists a function declaration to the containing scope.
-         */
-        hoistFunctionDeclaration(node: FunctionDeclaration): void;
-        /**
-         * Hoists a variable declaration to the containing scope.
-         */
-        hoistVariableDeclaration(node: Identifier): void;
-        /**
-         * Enables expression substitutions in the pretty printer for the provided SyntaxKind.
-         */
-        enableSubstitution(kind: SyntaxKind): void;
-        /**
-         * Determines whether expression substitutions are enabled for the provided node.
-         */
-        isSubstitutionEnabled(node: Node): boolean;
-        /**
-         * Hook used by transformers to substitute expressions just before they
-         * are emitted by the pretty printer.
-         */
-        onSubstituteNode?: (emitContext: EmitContext, node: Node) => Node;
-        /**
-         * Enables before/after emit notifications in the pretty printer for the provided
-         * SyntaxKind.
-         */
-        enableEmitNotification(kind: SyntaxKind): void;
-        /**
-         * Determines whether before/after emit notifications should be raised in the pretty
-         * printer when it emits a node.
-         */
-        isEmitNotificationEnabled(node: Node): boolean;
-        /**
-         * Hook used to allow transformers to capture state before or after
-         * the printer emits a node.
-         */
-        onEmitNode?: (emitContext: EmitContext, node: Node, emitCallback: (emitContext: EmitContext, node: Node) => void) => void;
-    }
-    type Transformer = (context: TransformationContext) => (node: SourceFile) => SourceFile;
-    function getTransformers(compilerOptions: CompilerOptions): Transformer[];
+    function getTransformers(compilerOptions: CompilerOptions, customTransformers?: CustomTransformers): TransformerFactory<SourceFile>[];
     /**
      * Transforms an array of SourceFiles by passing them through each transformer.
      *
      * @param resolver The emit resolver provided by the checker.
-     * @param host The emit host.
-     * @param sourceFiles An array of source files
-     * @param transforms An array of Transformers.
+     * @param host The emit host object used to interact with the file system.
+     * @param options Compiler options to surface in the `TransformationContext`.
+     * @param nodes An array of nodes to transform.
+     * @param transforms An array of `TransformerFactory` callbacks.
+     * @param allowDtsFiles A value indicating whether to allow the transformation of .d.ts files.
      */
-    function transformFiles(resolver: EmitResolver, host: EmitHost, sourceFiles: SourceFile[], transformers: Transformer[]): TransformationResult;
+    function transformNodes<T extends Node>(resolver: EmitResolver, host: EmitHost, options: CompilerOptions, nodes: T[], transformers: TransformerFactory<T>[], allowDtsFiles: boolean): TransformationResult<T>;
 }
 declare namespace ts {
     interface SourceMapWriter {
@@ -8844,10 +11327,9 @@ declare namespace ts {
          *
          * @param filePath The path to the generated output file.
          * @param sourceMapFilePath The path to the output source map file.
-         * @param sourceFiles The input source files for the program.
-         * @param isBundledEmit A value indicating whether the generated output file is a bundle.
+         * @param sourceFileOrBundle The input source file or bundle for the program.
          */
-        initialize(filePath: string, sourceMapFilePath: string, sourceFiles: SourceFile[], isBundledEmit: boolean): void;
+        initialize(filePath: string, sourceMapFilePath: string, sourceFileOrBundle: SourceFile | Bundle): void;
         /**
          * Reset the SourceMapWriter to an empty state.
          */
@@ -8857,7 +11339,7 @@ declare namespace ts {
          *
          * @param sourceFile The source file.
          */
-        setSourceFile(sourceFile: SourceFile): void;
+        setSourceFile(sourceFile: SourceMapSource): void;
         /**
          * Emits a mapping.
          *
@@ -8870,11 +11352,11 @@ declare namespace ts {
         /**
          * Emits a node with possible leading and trailing source maps.
          *
-         * @param emitContext The current emit context
+         * @param hint The current emit context
          * @param node The node to emit.
          * @param emitCallback The callback used to emit the node.
          */
-        emitNodeWithSourceMap(emitContext: EmitContext, node: Node, emitCallback: (emitContext: EmitContext, node: Node) => void): void;
+        emitNodeWithSourceMap(hint: EmitHint, node: Node, emitCallback: (hint: EmitHint, node: Node) => void): void;
         /**
          * Emits a token of a node node with possible leading and trailing source maps.
          *
@@ -8903,18 +11385,29 @@ declare namespace ts {
     interface CommentWriter {
         reset(): void;
         setSourceFile(sourceFile: SourceFile): void;
-        emitNodeWithComments(emitContext: EmitContext, node: Node, emitCallback: (emitContext: EmitContext, node: Node) => void): void;
+        setWriter(writer: EmitTextWriter): void;
+        emitNodeWithComments(hint: EmitHint, node: Node, emitCallback: (hint: EmitHint, node: Node) => void): void;
         emitBodyWithDetachedComments(node: Node, detachedRange: TextRange, emitCallback: (node: Node) => void): void;
         emitTrailingCommentsOfPosition(pos: number): void;
+        emitLeadingCommentsOfPosition(pos: number): void;
     }
-    function createCommentWriter(host: EmitHost, writer: EmitTextWriter, sourceMap: SourceMapWriter): CommentWriter;
+    function createCommentWriter(printerOptions: PrinterOptions, emitPos: ((pos: number) => void) | undefined): CommentWriter;
 }
 declare namespace ts {
-    function emitFiles(resolver: EmitResolver, host: EmitHost, targetSourceFile: SourceFile, emitOnlyDtsFiles?: boolean): EmitResult;
+    /**
+     * Iterates over the source files that are expected to have an emit output.
+     *
+     * @param host An EmitHost.
+     * @param action The action to execute.
+     * @param sourceFilesOrTargetSourceFile
+     *   If an array, the full list of source files to emit.
+     *   Else, calls `getSourceFilesToEmit` with the (optional) target source file to determine the list of source files to emit.
+     */
+    function forEachEmittedFile(host: EmitHost, action: (emitFileNames: EmitFileNames, sourceFileOrBundle: SourceFile | Bundle, emitOnlyDtsFiles: boolean) => void, sourceFilesOrTargetSourceFile?: SourceFile[] | SourceFile, emitOnlyDtsFiles?: boolean): void;
+    function emitFiles(resolver: EmitResolver, host: EmitHost, targetSourceFile: SourceFile, emitOnlyDtsFiles?: boolean, transformers?: TransformerFactory<SourceFile>[]): EmitResult;
+    function createPrinter(printerOptions?: PrinterOptions, handlers?: PrintHandlers): Printer;
 }
 declare namespace ts {
-    /** The version of the TypeScript compiler release */
-    const version = "2.1.0";
     function findConfigFile(searchPath: string, fileExists: (fileName: string) => boolean, configName?: string): string;
     function resolveTripleslashReference(moduleName: string, containingFile: string): string;
     function computeCommonSourceDirectoryOfFilenames(fileNames: string[], currentDirectory: string, getCanonicalFileName: (fileName: string) => string): string;
@@ -8926,8 +11419,28 @@ declare namespace ts {
         getNewLine(): string;
     }
     function formatDiagnostics(diagnostics: Diagnostic[], host: FormatDiagnosticsHost): string;
+    function formatDiagnosticsWithColorAndContext(diagnostics: Diagnostic[], host: FormatDiagnosticsHost): string;
     function flattenDiagnosticMessageText(messageText: string | DiagnosticMessageChain, newLine: string): string;
+    /**
+     * Create a new 'Program' instance. A Program is an immutable collection of 'SourceFile's and a 'CompilerOptions'
+     * that represent a compilation unit.
+     *
+     * Creating a program proceeds from a set of root files, expanding the set of inputs by following imports and
+     * triple-slash-reference-path directives transitively. '@types' and triple-slash-reference-types are also pulled in.
+     *
+     * @param rootNames - A set of root files.
+     * @param options - The compiler options which should be used.
+     * @param host - The host interacts with the underlying file system.
+     * @param oldProgram - Reuses an old program structure.
+     * @returns A 'Program' object.
+     */
     function createProgram(rootNames: string[], options: CompilerOptions, host?: CompilerHost, oldProgram?: Program): Program;
+    /**
+     * Returns a DiagnosticMessage if we won't include a resolved module due to its extension.
+     * The DiagnosticMessage's parameters are the imported module name, and the filename it resolved to.
+     * This returns a diagnostic even if the module will be an untyped module.
+     */
+    function getResolutionDiagnostic(options: CompilerOptions, {extension}: ResolvedModuleFull): DiagnosticMessage | undefined;
 }
 declare namespace ts {
     interface SourceFile {
@@ -8941,7 +11454,9 @@ declare namespace ts {
         getChildCount(sourceFile?: SourceFile): number;
         getChildAt(index: number, sourceFile?: SourceFile): Node;
         getChildren(sourceFile?: SourceFile): Node[];
+        getChildren(sourceFile?: SourceFileLike): Node[];
         getStart(sourceFile?: SourceFile, includeJsDocComment?: boolean): number;
+        getStart(sourceFile?: SourceFileLike, includeJsDocComment?: boolean): number;
         getFullStart(): number;
         getEnd(): number;
         getWidth(sourceFile?: SourceFile): number;
@@ -8951,32 +11466,35 @@ declare namespace ts {
         getText(sourceFile?: SourceFile): string;
         getFirstToken(sourceFile?: SourceFile): Node;
         getLastToken(sourceFile?: SourceFile): Node;
+        forEachChild<T>(cbNode: (node: Node) => T | undefined, cbNodeArray?: (nodes: NodeArray<Node>) => T | undefined): T | undefined;
     }
     interface Symbol {
         getFlags(): SymbolFlags;
         getName(): string;
-        getDeclarations(): Declaration[];
+        getDeclarations(): Declaration[] | undefined;
         getDocumentationComment(): SymbolDisplayPart[];
+        getJsDocTags(): JSDocTagInfo[];
     }
     interface Type {
         getFlags(): TypeFlags;
-        getSymbol(): Symbol;
+        getSymbol(): Symbol | undefined;
         getProperties(): Symbol[];
-        getProperty(propertyName: string): Symbol;
+        getProperty(propertyName: string): Symbol | undefined;
         getApparentProperties(): Symbol[];
         getCallSignatures(): Signature[];
         getConstructSignatures(): Signature[];
-        getStringIndexType(): Type;
-        getNumberIndexType(): Type;
-        getBaseTypes(): ObjectType[];
+        getStringIndexType(): Type | undefined;
+        getNumberIndexType(): Type | undefined;
+        getBaseTypes(): BaseType[] | undefined;
         getNonNullableType(): Type;
     }
     interface Signature {
         getDeclaration(): SignatureDeclaration;
-        getTypeParameters(): Type[];
+        getTypeParameters(): TypeParameter[] | undefined;
         getParameters(): Symbol[];
         getReturnType(): Type;
         getDocumentationComment(): SymbolDisplayPart[];
+        getJsDocTags(): JSDocTagInfo[];
     }
     interface SourceFile {
         version: string;
@@ -8984,10 +11502,17 @@ declare namespace ts {
         nameTable: Map<number>;
         getNamedDeclarations(): Map<Declaration[]>;
         getLineAndCharacterOfPosition(pos: number): LineAndCharacter;
+        getLineEndOfPosition(pos: number): number;
         getLineStarts(): number[];
         getPositionOfLineAndCharacter(line: number, character: number): number;
         update(newText: string, textChangeRange: TextChangeRange): SourceFile;
     }
+    interface SourceFileLike {
+        getLineAndCharacterOfPosition(pos: number): LineAndCharacter;
+    }
+    interface SourceMapSource {
+        getLineAndCharacterOfPosition(pos: number): LineAndCharacter;
+    }
     /**
      * Represents an immutable snapshot of a script at a specified time.Once acquired, the
      * snapshot is observably immutable. i.e. the same calls with the same parameters will return
@@ -9046,6 +11571,10 @@ declare namespace ts {
         resolveTypeReferenceDirectives?(typeDirectiveNames: string[], containingFile: string): ResolvedTypeReferenceDirective[];
         directoryExists?(directoryName: string): boolean;
         getDirectories?(directoryName: string): string[];
+        /**
+         * Gets a set of custom transformers to use during emit.
+         */
+        getCustomTransformers?(): CustomTransformers | undefined;
     }
     interface LanguageService {
         cleanupSemanticCache(): void;
@@ -9081,6 +11610,7 @@ declare namespace ts {
         getOccurrencesAtPosition(fileName: string, position: number): ReferenceEntry[];
         getNavigateToItems(searchValue: string, maxResultCount?: number, fileName?: string, excludeDtsFiles?: boolean): NavigateToItem[];
         getNavigationBarItems(fileName: string): NavigationBarItem[];
+        getNavigationTree(fileName: string): NavigationTree;
         getOutliningSpans(fileName: string): OutliningSpan[];
         getTodoComments(fileName: string, descriptors: TodoCommentDescriptor[]): TodoComment[];
         getBraceMatchingAtPosition(fileName: string, position: number): TextSpan[];
@@ -9090,6 +11620,9 @@ declare namespace ts {
         getFormattingEditsAfterKeystroke(fileName: string, position: number, key: string, options: FormatCodeOptions | FormatCodeSettings): TextChange[];
         getDocCommentTemplateAtPosition(fileName: string, position: number): TextInsertion;
         isValidBraceCompletionAtPosition(fileName: string, position: number, openingBrace: number): boolean;
+        getCodeFixesAtPosition(fileName: string, start: number, end: number, errorCodes: number[], formatOptions: FormatCodeSettings): CodeAction[];
+        getApplicableRefactors(fileName: string, positionOrRaneg: number | TextRange): ApplicableRefactorInfo[];
+        getEditsForRefactor(fileName: string, formatOptions: FormatCodeSettings, positionOrRange: number | TextRange, refactorName: string, actionName: string): RefactorEditInfo | undefined;
         getEmitOutput(fileName: string, emitOnlyDtsFiles?: boolean): EmitOutput;
         getProgram(): Program;
         getNonBoundSourceFile(fileName: string): SourceFile;
@@ -9106,11 +11639,17 @@ declare namespace ts {
     }
     interface ClassifiedSpan {
         textSpan: TextSpan;
-        classificationType: string;
+        classificationType: ClassificationTypeNames;
     }
+    /**
+     * Navigation bar interface designed for visual studio's dual-column layout.
+     * This does not form a proper tree.
+     * The navbar is returned as a list of top-level items, each of which has a list of child items.
+     * Child items always have an empty array for their `childItems`.
+     */
     interface NavigationBarItem {
         text: string;
-        kind: string;
+        kind: ScriptElementKind;
         kindModifiers: string;
         spans: TextSpan[];
         childItems: NavigationBarItem[];
@@ -9118,6 +11657,24 @@ declare namespace ts {
         bolded: boolean;
         grayed: boolean;
     }
+    /**
+     * Node in a tree of nested declarations in a file.
+     * The top node is always a script or module node.
+     */
+    interface NavigationTree {
+        /** Name of the declaration, or a short description, e.g. "<class>". */
+        text: string;
+        kind: ScriptElementKind;
+        /** ScriptElementKindModifier separated by commas, e.g. "public,abstract" */
+        kindModifiers: string;
+        /**
+         * Spans of the nodes that generated this declaration.
+         * There will be more than one if this is the result of merging.
+         */
+        spans: TextSpan[];
+        /** Present if non-empty */
+        childItems?: NavigationTree[];
+    }
     interface TodoCommentDescriptor {
         text: string;
         priority: number;
@@ -9131,50 +11688,110 @@ declare namespace ts {
         span: TextSpan;
         newText: string;
     }
+    interface FileTextChanges {
+        fileName: string;
+        textChanges: TextChange[];
+    }
+    interface CodeAction {
+        /** Description of the code action to display in the UI of the editor */
+        description: string;
+        /** Text changes to apply to each file as part of the code action */
+        changes: FileTextChanges[];
+    }
+    /**
+     * A set of one or more available refactoring actions, grouped under a parent refactoring.
+     */
+    interface ApplicableRefactorInfo {
+        /**
+         * The programmatic name of the refactoring
+         */
+        name: string;
+        /**
+         * A description of this refactoring category to show to the user.
+         * If the refactoring gets inlined (see below), this text will not be visible.
+         */
+        description: string;
+        /**
+         * Inlineable refactorings can have their actions hoisted out to the top level
+         * of a context menu. Non-inlineanable refactorings should always be shown inside
+         * their parent grouping.
+         *
+         * If not specified, this value is assumed to be 'true'
+         */
+        inlineable?: boolean;
+        actions: RefactorActionInfo[];
+    }
+    /**
+     * Represents a single refactoring action - for example, the "Extract Method..." refactor might
+     * offer several actions, each corresponding to a surround class or closure to extract into.
+     */
+    type RefactorActionInfo = {
+        /**
+         * The programmatic name of the refactoring action
+         */
+        name: string;
+        /**
+         * A description of this refactoring action to show to the user.
+         * If the parent refactoring is inlined away, this will be the only text shown,
+         * so this description should make sense by itself if the parent is inlineable=true
+         */
+        description: string;
+    };
+    /**
+     * A set of edits to make in response to a refactor action, plus an optional
+     * location where renaming should be invoked from
+     */
+    type RefactorEditInfo = {
+        edits: FileTextChanges[];
+        renameFilename?: string;
+        renameLocation?: number;
+    };
     interface TextInsertion {
         newText: string;
         /** The position in newText the caret should point to after the insertion. */
         caretOffset: number;
     }
-    interface RenameLocation {
+    interface DocumentSpan {
         textSpan: TextSpan;
         fileName: string;
     }
-    interface ReferenceEntry {
-        textSpan: TextSpan;
-        fileName: string;
+    interface RenameLocation extends DocumentSpan {
+    }
+    interface ReferenceEntry extends DocumentSpan {
         isWriteAccess: boolean;
         isDefinition: boolean;
+        isInString?: true;
     }
-    interface ImplementationLocation {
-        textSpan: TextSpan;
-        fileName: string;
+    interface ImplementationLocation extends DocumentSpan {
+        kind: ScriptElementKind;
+        displayParts: SymbolDisplayPart[];
     }
     interface DocumentHighlights {
         fileName: string;
         highlightSpans: HighlightSpan[];
     }
-    namespace HighlightSpanKind {
-        const none = "none";
-        const definition = "definition";
-        const reference = "reference";
-        const writtenReference = "writtenReference";
+    const enum HighlightSpanKind {
+        none = "none",
+        definition = "definition",
+        reference = "reference",
+        writtenReference = "writtenReference",
     }
     interface HighlightSpan {
         fileName?: string;
+        isInString?: true;
         textSpan: TextSpan;
-        kind: string;
+        kind: HighlightSpanKind;
     }
     interface NavigateToItem {
         name: string;
-        kind: string;
+        kind: ScriptElementKind;
         kindModifiers: string;
         matchKind: string;
         isCaseSensitive: boolean;
         fileName: string;
         textSpan: TextSpan;
         containerName: string;
-        containerKind: string;
+        containerKind: ScriptElementKind;
     }
     enum IndentStyle {
         None = 0,
@@ -9191,16 +11808,17 @@ declare namespace ts {
     }
     interface EditorSettings {
         baseIndentSize?: number;
-        indentSize: number;
-        tabSize: number;
-        newLineCharacter: string;
-        convertTabsToSpaces: boolean;
-        indentStyle: IndentStyle;
+        indentSize?: number;
+        tabSize?: number;
+        newLineCharacter?: string;
+        convertTabsToSpaces?: boolean;
+        indentStyle?: IndentStyle;
     }
     interface FormatCodeOptions extends EditorOptions {
         InsertSpaceAfterCommaDelimiter: boolean;
         InsertSpaceAfterSemicolonInForStatements: boolean;
         InsertSpaceBeforeAndAfterBinaryOperators: boolean;
+        InsertSpaceAfterConstructor?: boolean;
         InsertSpaceAfterKeywordsInControlFlowStatements: boolean;
         InsertSpaceAfterFunctionKeywordForAnonymousFunctions: boolean;
         InsertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis: boolean;
@@ -9209,30 +11827,33 @@ declare namespace ts {
         InsertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces: boolean;
         InsertSpaceAfterOpeningAndBeforeClosingJsxExpressionBraces?: boolean;
         InsertSpaceAfterTypeAssertion?: boolean;
+        InsertSpaceBeforeFunctionParenthesis?: boolean;
         PlaceOpenBraceOnNewLineForFunctions: boolean;
         PlaceOpenBraceOnNewLineForControlBlocks: boolean;
     }
     interface FormatCodeSettings extends EditorSettings {
-        insertSpaceAfterCommaDelimiter: boolean;
-        insertSpaceAfterSemicolonInForStatements: boolean;
-        insertSpaceBeforeAndAfterBinaryOperators: boolean;
-        insertSpaceAfterKeywordsInControlFlowStatements: boolean;
-        insertSpaceAfterFunctionKeywordForAnonymousFunctions: boolean;
-        insertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis: boolean;
-        insertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets: boolean;
+        insertSpaceAfterCommaDelimiter?: boolean;
+        insertSpaceAfterSemicolonInForStatements?: boolean;
+        insertSpaceBeforeAndAfterBinaryOperators?: boolean;
+        insertSpaceAfterConstructor?: boolean;
+        insertSpaceAfterKeywordsInControlFlowStatements?: boolean;
+        insertSpaceAfterFunctionKeywordForAnonymousFunctions?: boolean;
+        insertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis?: boolean;
+        insertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets?: boolean;
         insertSpaceAfterOpeningAndBeforeClosingNonemptyBraces?: boolean;
-        insertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces: boolean;
-        insertSpaceAfterOpeningAndBeforeClosingJsxExpressionBraces: boolean;
+        insertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces?: boolean;
+        insertSpaceAfterOpeningAndBeforeClosingJsxExpressionBraces?: boolean;
         insertSpaceAfterTypeAssertion?: boolean;
-        placeOpenBraceOnNewLineForFunctions: boolean;
-        placeOpenBraceOnNewLineForControlBlocks: boolean;
+        insertSpaceBeforeFunctionParenthesis?: boolean;
+        placeOpenBraceOnNewLineForFunctions?: boolean;
+        placeOpenBraceOnNewLineForControlBlocks?: boolean;
     }
     interface DefinitionInfo {
         fileName: string;
         textSpan: TextSpan;
-        kind: string;
+        kind: ScriptElementKind;
         name: string;
-        containerKind: string;
+        containerKind: ScriptElementKind;
         containerName: string;
     }
     interface ReferencedSymbolDefinitionInfo extends DefinitionInfo {
@@ -9270,19 +11891,24 @@ declare namespace ts {
         text: string;
         kind: string;
     }
+    interface JSDocTagInfo {
+        name: string;
+        text?: string;
+    }
     interface QuickInfo {
-        kind: string;
+        kind: ScriptElementKind;
         kindModifiers: string;
         textSpan: TextSpan;
         displayParts: SymbolDisplayPart[];
         documentation: SymbolDisplayPart[];
+        tags: JSDocTagInfo[];
     }
     interface RenameInfo {
         canRename: boolean;
         localizedErrorMessage: string;
         displayName: string;
         fullDisplayName: string;
-        kind: string;
+        kind: ScriptElementKind;
         kindModifiers: string;
         triggerSpan: TextSpan;
     }
@@ -9306,6 +11932,7 @@ declare namespace ts {
         separatorDisplayParts: SymbolDisplayPart[];
         parameters: SignatureHelpParameter[];
         documentation: SymbolDisplayPart[];
+        tags: JSDocTagInfo[];
     }
     /**
      * Represents a set of signature help items, and the preferred item that should be selected.
@@ -9318,28 +11945,33 @@ declare namespace ts {
         argumentCount: number;
     }
     interface CompletionInfo {
+        isGlobalCompletion: boolean;
         isMemberCompletion: boolean;
+        /**
+         * true when the current location also allows for a new identifier
+         */
         isNewIdentifierLocation: boolean;
         entries: CompletionEntry[];
     }
     interface CompletionEntry {
         name: string;
-        kind: string;
+        kind: ScriptElementKind;
         kindModifiers: string;
         sortText: string;
         /**
-          * An optional span that indicates the text to be replaced by this completion item. It will be
-          * set if the required span differs from the one generated by the default replacement behavior and should
-          * be used in that case
-          */
+         * An optional span that indicates the text to be replaced by this completion item. It will be
+         * set if the required span differs from the one generated by the default replacement behavior and should
+         * be used in that case
+         */
         replacementSpan?: TextSpan;
     }
     interface CompletionEntryDetails {
         name: string;
-        kind: string;
+        kind: ScriptElementKind;
         kindModifiers: string;
         displayParts: SymbolDisplayPart[];
         documentation: SymbolDisplayPart[];
+        tags: JSDocTagInfo[];
     }
     interface OutliningSpan {
         /** The span of the document to actually collapse. */
@@ -9349,9 +11981,9 @@ declare namespace ts {
         /** The text to display in the editor for the collapsed region. */
         bannerText: string;
         /**
-          * Whether or not this region should be automatically collapsed when
-          * the 'Collapse to Definitions' command is invoked.
-          */
+         * Whether or not this region should be automatically collapsed when
+         * the 'Collapse to Definitions' command is invoked.
+         */
         autoCollapse: boolean;
     }
     interface EmitOutput {
@@ -9420,103 +12052,107 @@ declare namespace ts {
         getClassificationsForLine(text: string, lexState: EndOfLineState, syntacticClassifierAbsent: boolean): ClassificationResult;
         getEncodedLexicalClassifications(text: string, endOfLineState: EndOfLineState, syntacticClassifierAbsent: boolean): Classifications;
     }
-    namespace ScriptElementKind {
-        const unknown = "";
-        const warning = "warning";
+    const enum ScriptElementKind {
+        unknown = "",
+        warning = "warning",
         /** predefined type (void) or keyword (class) */
-        const keyword = "keyword";
+        keyword = "keyword",
         /** top level script node */
-        const scriptElement = "script";
+        scriptElement = "script",
         /** module foo {} */
-        const moduleElement = "module";
+        moduleElement = "module",
         /** class X {} */
-        const classElement = "class";
+        classElement = "class",
         /** var x = class X {} */
-        const localClassElement = "local class";
+        localClassElement = "local class",
         /** interface Y {} */
-        const interfaceElement = "interface";
+        interfaceElement = "interface",
         /** type T = ... */
-        const typeElement = "type";
+        typeElement = "type",
         /** enum E */
-        const enumElement = "enum";
-        const enumMemberElement = "const";
+        enumElement = "enum",
+        enumMemberElement = "enum member",
         /**
          * Inside module and script only
          * const v = ..
          */
-        const variableElement = "var";
+        variableElement = "var",
         /** Inside function */
-        const localVariableElement = "local var";
+        localVariableElement = "local var",
         /**
          * Inside module and script only
          * function f() { }
          */
-        const functionElement = "function";
+        functionElement = "function",
         /** Inside function */
-        const localFunctionElement = "local function";
+        localFunctionElement = "local function",
         /** class X { [public|private]* foo() {} } */
-        const memberFunctionElement = "method";
+        memberFunctionElement = "method",
         /** class X { [public|private]* [get|set] foo:number; } */
-        const memberGetAccessorElement = "getter";
-        const memberSetAccessorElement = "setter";
+        memberGetAccessorElement = "getter",
+        memberSetAccessorElement = "setter",
         /**
          * class X { [public|private]* foo:number; }
          * interface Y { foo:number; }
          */
-        const memberVariableElement = "property";
+        memberVariableElement = "property",
         /** class X { constructor() { } } */
-        const constructorImplementationElement = "constructor";
+        constructorImplementationElement = "constructor",
         /** interface Y { ():number; } */
-        const callSignatureElement = "call";
+        callSignatureElement = "call",
         /** interface Y { []:number; } */
-        const indexSignatureElement = "index";
+        indexSignatureElement = "index",
         /** interface Y { new():Y; } */
-        const constructSignatureElement = "construct";
+        constructSignatureElement = "construct",
         /** function foo(*Y*: string) */
-        const parameterElement = "parameter";
-        const typeParameterElement = "type parameter";
-        const primitiveType = "primitive type";
-        const label = "label";
-        const alias = "alias";
-        const constElement = "const";
-        const letElement = "let";
-        const directory = "directory";
-        const externalModuleName = "external module name";
-    }
-    namespace ScriptElementKindModifier {
-        const none = "";
-        const publicMemberModifier = "public";
-        const privateMemberModifier = "private";
-        const protectedMemberModifier = "protected";
-        const exportedModifier = "export";
-        const ambientModifier = "declare";
-        const staticModifier = "static";
-        const abstractModifier = "abstract";
-    }
-    class ClassificationTypeNames {
-        static comment: string;
-        static identifier: string;
-        static keyword: string;
-        static numericLiteral: string;
-        static operator: string;
-        static stringLiteral: string;
-        static whiteSpace: string;
-        static text: string;
-        static punctuation: string;
-        static className: string;
-        static enumName: string;
-        static interfaceName: string;
-        static moduleName: string;
-        static typeParameterName: string;
-        static typeAliasName: string;
-        static parameterName: string;
-        static docCommentTagName: string;
-        static jsxOpenTagName: string;
-        static jsxCloseTagName: string;
-        static jsxSelfClosingTagName: string;
-        static jsxAttribute: string;
-        static jsxText: string;
-        static jsxAttributeStringLiteralValue: string;
+        parameterElement = "parameter",
+        typeParameterElement = "type parameter",
+        primitiveType = "primitive type",
+        label = "label",
+        alias = "alias",
+        constElement = "const",
+        letElement = "let",
+        directory = "directory",
+        externalModuleName = "external module name",
+        /**
+         * <JsxTagName attribute1 attribute2={0} />
+         */
+        jsxAttribute = "JSX attribute",
+    }
+    const enum ScriptElementKindModifier {
+        none = "",
+        publicMemberModifier = "public",
+        privateMemberModifier = "private",
+        protectedMemberModifier = "protected",
+        exportedModifier = "export",
+        ambientModifier = "declare",
+        staticModifier = "static",
+        abstractModifier = "abstract",
+    }
+    const enum ClassificationTypeNames {
+        comment = "comment",
+        identifier = "identifier",
+        keyword = "keyword",
+        numericLiteral = "number",
+        operator = "operator",
+        stringLiteral = "string",
+        whiteSpace = "whitespace",
+        text = "text",
+        punctuation = "punctuation",
+        className = "class name",
+        enumName = "enum name",
+        interfaceName = "interface name",
+        moduleName = "module name",
+        typeParameterName = "type parameter name",
+        typeAliasName = "type alias name",
+        parameterName = "parameter name",
+        docCommentTagName = "doc comment tag name",
+        jsxOpenTagName = "jsx open tag name",
+        jsxCloseTagName = "jsx close tag name",
+        jsxSelfClosingTagName = "jsx self closing tag name",
+        jsxAttribute = "jsx attribute",
+        jsxText = "jsx text",
+        jsxAttributeStringLiteralValue = "jsx attribute string literal value",
     }
     const enum ClassificationType {
         comment = 1,
@@ -9557,6 +12193,7 @@ declare namespace ts {
     }
     function getMeaningFromDeclaration(node: Node): SemanticMeaning;
     function getMeaningFromLocation(node: Node): SemanticMeaning;
+    function isInRightSideOfInternalImportEqualsDeclaration(node: Node): boolean;
     function isCallExpressionTarget(node: Node): boolean;
     function isNewExpressionTarget(node: Node): boolean;
     function climbPastPropertyAccess(node: Node): Node;
@@ -9569,17 +12206,14 @@ declare namespace ts {
     function isNameOfFunctionDeclaration(node: Node): boolean;
     function isLiteralNameOfPropertyDeclarationOrIndexAccess(node: Node): boolean;
     function isExpressionOfExternalModuleImportEqualsDeclaration(node: Node): boolean;
-    /** Returns true if the position is within a comment */
-    function isInsideComment(sourceFile: SourceFile, token: Node, position: number): boolean;
     function getContainerNode(node: Node): Declaration;
-    function getNodeKind(node: Node): string;
-    function getStringLiteralTypeForNode(node: StringLiteral | LiteralTypeNode, typeChecker: TypeChecker): LiteralType;
+    function getNodeKind(node: Node): ScriptElementKind;
     function isThis(node: Node): boolean;
     interface ListItemInfo {
         listItemIndex: number;
         list: Node;
     }
-    function getLineStartPositionForPosition(position: number, sourceFile: SourceFile): number;
+    function getLineStartPositionForPosition(position: number, sourceFile: SourceFileLike): number;
     function rangeContainsRange(r1: TextRange, r2: TextRange): boolean;
     function startEndContainsRange(start: number, end: number, range: TextRange): boolean;
     function rangeContainsStartEnd(range: TextRange, start: number, end: number): boolean;
@@ -9589,61 +12223,68 @@ declare namespace ts {
     function isCompletedNode(n: Node, sourceFile: SourceFile): boolean;
     function findListItemInfo(node: Node): ListItemInfo;
     function hasChildOfKind(n: Node, kind: SyntaxKind, sourceFile?: SourceFile): boolean;
-    function findChildOfKind(n: Node, kind: SyntaxKind, sourceFile?: SourceFile): Node;
+    function findChildOfKind(n: Node, kind: SyntaxKind, sourceFile?: SourceFileLike): Node | undefined;
     function findContainingList(node: Node): Node;
-    function getTouchingWord(sourceFile: SourceFile, position: number, includeJsDocComment?: boolean): Node;
-    function getTouchingPropertyName(sourceFile: SourceFile, position: number, includeJsDocComment?: boolean): Node;
-    /** Returns the token if position is in [start, end) or if position === end and includeItemAtEndPosition(token) === true */
-    function getTouchingToken(sourceFile: SourceFile, position: number, includeItemAtEndPosition?: (n: Node) => boolean, includeJsDocComment?: boolean): Node;
+    function getTouchingWord(sourceFile: SourceFile, position: number, includeJsDocComment: boolean): Node;
+    function getTouchingPropertyName(sourceFile: SourceFile, position: number, includeJsDocComment: boolean): Node;
+    /**
+     * Returns the token if position is in [start, end).
+     * If position === end, returns the preceding token if includeItemAtEndPosition(previousToken) === true
+     */
+    function getTouchingToken(sourceFile: SourceFile, position: number, includeJsDocComment: boolean, includePrecedingTokenAtEndPosition?: (n: Node) => boolean): Node;
     /** Returns a token if position is in [start-of-leading-trivia, end) */
-    function getTokenAtPosition(sourceFile: SourceFile, position: number, includeJsDocComment?: boolean): Node;
-    /**
-      * The token on the left of the position is the token that strictly includes the position
-      * or sits to the left of the cursor if it is on a boundary. For example
-      *
-      *   fo|o               -> will return foo
-      *   foo <comment> |bar -> will return foo
-      *
-      */
+    function getTokenAtPosition(sourceFile: SourceFile, position: number, includeJsDocComment: boolean, includeEndPosition?: boolean): Node;
+    /**
+     * The token on the left of the position is the token that strictly includes the position
+     * or sits to the left of the cursor if it is on a boundary. For example
+     *
+     *   fo|o               -> will return foo
+     *   foo <comment> |bar -> will return foo
+     *
+     */
     function findTokenOnLeftOfPosition(file: SourceFile, position: number): Node;
     function findNextToken(previousToken: Node, parent: Node): Node;
-    function findPrecedingToken(position: number, sourceFile: SourceFile, startNode?: Node): Node;
+    function findPrecedingToken(position: number, sourceFile: SourceFile, startNode?: Node, includeJsDoc?: boolean): Node;
     function isInString(sourceFile: SourceFile, position: number): boolean;
-    function isInComment(sourceFile: SourceFile, position: number): boolean;
     /**
      * returns true if the position is in between the open and close elements of an JSX expression.
      */
     function isInsideJsxElementOrAttribute(sourceFile: SourceFile, position: number): boolean;
     function isInTemplateString(sourceFile: SourceFile, position: number): boolean;
     /**
-     * Returns true if the cursor at position in sourceFile is within a comment that additionally
-     * satisfies predicate, and false otherwise.
+     * Returns true if the cursor at position in sourceFile is within a comment.
+     *
+     * @param tokenAtPosition Must equal `getTokenAtPosition(sourceFile, position)
+     * @param predicate Additional predicate to test on the comment range.
      */
-    function isInCommentHelper(sourceFile: SourceFile, position: number, predicate?: (c: CommentRange) => boolean): boolean;
+    function isInComment(sourceFile: SourceFile, position: number, tokenAtPosition?: Node, predicate?: (c: CommentRange) => boolean): boolean;
     function hasDocComment(sourceFile: SourceFile, position: number): boolean;
-    /**
-     * Get the corresponding JSDocTag node if the position is in a jsDoc comment
-     */
-    function getJsDocTagAtPosition(sourceFile: SourceFile, position: number): JSDocTag;
     function getNodeModifiers(node: Node): string;
     function getTypeArgumentOrTypeParameterList(node: Node): NodeArray<Node>;
-    function isToken(n: Node): boolean;
     function isWord(kind: SyntaxKind): boolean;
     function isComment(kind: SyntaxKind): boolean;
     function isStringOrRegularExpressionOrTemplateLiteral(kind: SyntaxKind): boolean;
     function isPunctuation(kind: SyntaxKind): boolean;
     function isInsideTemplateLiteral(node: LiteralExpression, position: number): boolean;
     function isAccessibilityModifier(kind: SyntaxKind): boolean;
+    function cloneCompilerOptions(options: CompilerOptions): CompilerOptions;
     function compareDataObjects(dst: any, src: any): boolean;
     function isArrayLiteralOrObjectLiteralDestructuringPattern(node: Node): boolean;
     function hasTrailingDirectorySeparator(path: string): boolean;
     function isInReferenceComment(sourceFile: SourceFile, position: number): boolean;
     function isInNonReferenceComment(sourceFile: SourceFile, position: number): boolean;
+    function createTextSpanFromNode(node: Node, sourceFile?: SourceFile): TextSpan;
+    function createTextSpanFromRange(range: TextRange): TextSpan;
+    function isTypeKeyword(kind: SyntaxKind): boolean;
+    /** True if the symbol is for an external module, as opposed to a namespace. */
+    function isExternalModuleSymbol(moduleSymbol: Symbol): boolean;
+    /** Returns `true` the first time it encounters a node and `false` afterwards. */
+    function nodeSeenTracker<T extends Node>(): (node: T) => boolean;
 }
 declare namespace ts {
     function isFirstDeclarationOfSymbolParameter(symbol: Symbol): boolean;
     function symbolPart(text: string, symbol: Symbol): SymbolDisplayPart;
-    function displayPart(text: string, kind: SymbolDisplayPartKind, symbol?: Symbol): SymbolDisplayPart;
+    function displayPart(text: string, kind: SymbolDisplayPartKind): SymbolDisplayPart;
     function spacePart(): SymbolDisplayPart;
     function keywordPart(kind: SyntaxKind): SymbolDisplayPart;
     function punctuationPart(kind: SyntaxKind): SymbolDisplayPart;
@@ -9660,7 +12301,7 @@ declare namespace ts {
     function symbolToDisplayParts(typeChecker: TypeChecker, symbol: Symbol, enclosingDeclaration?: Node, meaning?: SymbolFlags, flags?: SymbolFormatFlags): SymbolDisplayPart[];
     function signatureToDisplayParts(typechecker: TypeChecker, signature: Signature, enclosingDeclaration?: Node, flags?: TypeFormatFlags): SymbolDisplayPart[];
     function getDeclaredName(typeChecker: TypeChecker, symbol: Symbol, location: Node): string;
-    function isImportOrExportSpecifierName(location: Node): boolean;
+    function isImportOrExportSpecifierName(location: Node): location is Identifier;
     /**
      * Strip off existed single quotes or double quotes from a given string
      *
@@ -9669,10 +12310,9 @@ declare namespace ts {
     function stripQuotes(name: string): string;
     function scriptKindIs(fileName: string, host: LanguageServiceHost, ...scriptKinds: ScriptKind[]): boolean;
     function getScriptKind(fileName: string, host?: LanguageServiceHost): ScriptKind;
-    function sanitizeConfigFile(configFileName: string, content: string): {
-        configJsonObject: any;
-        diagnostics: Diagnostic[];
-    };
+    function getFirstNonSpaceCharacterPosition(text: string, position: number): number;
+    function getOpenBrace(constructor: ConstructorDeclaration, sourceFile: SourceFile): Node;
+    function getOpenBraceOfClassLike(declaration: ClassLikeDeclaration, sourceFile: SourceFile): Node;
 }
 declare namespace ts {
     function createClassifier(): Classifier;
@@ -9681,71 +12321,76 @@ declare namespace ts {
     function getSyntacticClassifications(cancellationToken: CancellationToken, sourceFile: SourceFile, span: TextSpan): ClassifiedSpan[];
     function getEncodedSyntacticClassifications(cancellationToken: CancellationToken, sourceFile: SourceFile, span: TextSpan): Classifications;
 }
+declare namespace ts.Completions.PathCompletions {
+    function getStringLiteralCompletionEntriesFromModuleNames(node: StringLiteral, compilerOptions: CompilerOptions, host: LanguageServiceHost, typeChecker: TypeChecker): CompletionInfo;
+    function getTripleSlashReferenceCompletion(sourceFile: SourceFile, position: number, compilerOptions: CompilerOptions, host: LanguageServiceHost): CompletionInfo;
+}
 declare namespace ts.Completions {
-    function getCompletionsAtPosition(host: LanguageServiceHost, typeChecker: TypeChecker, log: (message: string) => void, compilerOptions: CompilerOptions, sourceFile: SourceFile, position: number): CompletionInfo;
+    type Log = (message: string) => void;
+    function getCompletionsAtPosition(host: LanguageServiceHost, typeChecker: TypeChecker, log: Log, compilerOptions: CompilerOptions, sourceFile: SourceFile, position: number): CompletionInfo | undefined;
     function getCompletionEntryDetails(typeChecker: TypeChecker, log: (message: string) => void, compilerOptions: CompilerOptions, sourceFile: SourceFile, position: number, entryName: string): CompletionEntryDetails;
     function getCompletionEntrySymbol(typeChecker: TypeChecker, log: (message: string) => void, compilerOptions: CompilerOptions, sourceFile: SourceFile, position: number, entryName: string): Symbol;
 }
 declare namespace ts.DocumentHighlights {
-    function getDocumentHighlights(typeChecker: TypeChecker, cancellationToken: CancellationToken, sourceFile: SourceFile, position: number, sourceFilesToSearch: SourceFile[]): DocumentHighlights[];
+    function getDocumentHighlights(program: Program, cancellationToken: CancellationToken, sourceFile: SourceFile, position: number, sourceFilesToSearch: SourceFile[]): DocumentHighlights[] | undefined;
 }
 declare namespace ts {
     /**
-      * The document registry represents a store of SourceFile objects that can be shared between
-      * multiple LanguageService instances. A LanguageService instance holds on the SourceFile (AST)
-      * of files in the context.
-      * SourceFile objects account for most of the memory usage by the language service. Sharing
-      * the same DocumentRegistry instance between different instances of LanguageService allow
-      * for more efficient memory utilization since all projects will share at least the library
-      * file (lib.d.ts).
-      *
-      * A more advanced use of the document registry is to serialize sourceFile objects to disk
-      * and re-hydrate them when needed.
-      *
-      * To create a default DocumentRegistry, use createDocumentRegistry to create one, and pass it
-      * to all subsequent createLanguageService calls.
-      */
+     * The document registry represents a store of SourceFile objects that can be shared between
+     * multiple LanguageService instances. A LanguageService instance holds on the SourceFile (AST)
+     * of files in the context.
+     * SourceFile objects account for most of the memory usage by the language service. Sharing
+     * the same DocumentRegistry instance between different instances of LanguageService allow
+     * for more efficient memory utilization since all projects will share at least the library
+     * file (lib.d.ts).
+     *
+     * A more advanced use of the document registry is to serialize sourceFile objects to disk
+     * and re-hydrate them when needed.
+     *
+     * To create a default DocumentRegistry, use createDocumentRegistry to create one, and pass it
+     * to all subsequent createLanguageService calls.
+     */
     interface DocumentRegistry {
         /**
-          * Request a stored SourceFile with a given fileName and compilationSettings.
-          * The first call to acquire will call createLanguageServiceSourceFile to generate
-          * the SourceFile if was not found in the registry.
-          *
-          * @param fileName The name of the file requested
-          * @param compilationSettings Some compilation settings like target affects the
-          * shape of a the resulting SourceFile. This allows the DocumentRegistry to store
-          * multiple copies of the same file for different compilation settings.
-          * @parm scriptSnapshot Text of the file. Only used if the file was not found
-          * in the registry and a new one was created.
-          * @parm version Current version of the file. Only used if the file was not found
-          * in the registry and a new one was created.
-          */
+         * Request a stored SourceFile with a given fileName and compilationSettings.
+         * The first call to acquire will call createLanguageServiceSourceFile to generate
+         * the SourceFile if was not found in the registry.
+         *
+         * @param fileName The name of the file requested
+         * @param compilationSettings Some compilation settings like target affects the
+         * shape of a the resulting SourceFile. This allows the DocumentRegistry to store
+         * multiple copies of the same file for different compilation settings.
+         * @parm scriptSnapshot Text of the file. Only used if the file was not found
+         * in the registry and a new one was created.
+         * @parm version Current version of the file. Only used if the file was not found
+         * in the registry and a new one was created.
+         */
         acquireDocument(fileName: string, compilationSettings: CompilerOptions, scriptSnapshot: IScriptSnapshot, version: string, scriptKind?: ScriptKind): SourceFile;
         acquireDocumentWithKey(fileName: string, path: Path, compilationSettings: CompilerOptions, key: DocumentRegistryBucketKey, scriptSnapshot: IScriptSnapshot, version: string, scriptKind?: ScriptKind): SourceFile;
         /**
-          * Request an updated version of an already existing SourceFile with a given fileName
-          * and compilationSettings. The update will in-turn call updateLanguageServiceSourceFile
-          * to get an updated SourceFile.
-          *
-          * @param fileName The name of the file requested
-          * @param compilationSettings Some compilation settings like target affects the
-          * shape of a the resulting SourceFile. This allows the DocumentRegistry to store
-          * multiple copies of the same file for different compilation settings.
-          * @param scriptSnapshot Text of the file.
-          * @param version Current version of the file.
-          */
+         * Request an updated version of an already existing SourceFile with a given fileName
+         * and compilationSettings. The update will in-turn call updateLanguageServiceSourceFile
+         * to get an updated SourceFile.
+         *
+         * @param fileName The name of the file requested
+         * @param compilationSettings Some compilation settings like target affects the
+         * shape of a the resulting SourceFile. This allows the DocumentRegistry to store
+         * multiple copies of the same file for different compilation settings.
+         * @param scriptSnapshot Text of the file.
+         * @param version Current version of the file.
+         */
         updateDocument(fileName: string, compilationSettings: CompilerOptions, scriptSnapshot: IScriptSnapshot, version: string, scriptKind?: ScriptKind): SourceFile;
         updateDocumentWithKey(fileName: string, path: Path, compilationSettings: CompilerOptions, key: DocumentRegistryBucketKey, scriptSnapshot: IScriptSnapshot, version: string, scriptKind?: ScriptKind): SourceFile;
         getKeyForCompilationSettings(settings: CompilerOptions): DocumentRegistryBucketKey;
         /**
-          * Informs the DocumentRegistry that a file is not needed any longer.
-          *
-          * Note: It is not allowed to call release on a SourceFile that was not acquired from
-          * this registry originally.
-          *
-          * @param fileName The name of the file to be released
-          * @param compilationSettings The compilation settings used to acquire the file
-          */
+         * Informs the DocumentRegistry that a file is not needed any longer.
+         *
+         * Note: It is not allowed to call release on a SourceFile that was not acquired from
+         * this registry originally.
+         *
+         * @param fileName The name of the file to be released
+         * @param compilationSettings The compilation settings used to acquire the file
+         */
         releaseDocument(fileName: string, compilationSettings: CompilerOptions): void;
         releaseDocumentWithKey(path: Path, key: DocumentRegistryBucketKey): void;
         reportStats(): string;
@@ -9756,22 +12401,130 @@ declare namespace ts {
     function createDocumentRegistry(useCaseSensitiveFileNames?: boolean, currentDirectory?: string): DocumentRegistry;
 }
 declare namespace ts.FindAllReferences {
-    function findReferencedSymbols(typeChecker: TypeChecker, cancellationToken: CancellationToken, sourceFiles: SourceFile[], sourceFile: SourceFile, position: number, findInStrings: boolean, findInComments: boolean): ReferencedSymbol[];
-    function getReferencedSymbolsForNode(typeChecker: TypeChecker, cancellationToken: CancellationToken, node: Node, sourceFiles: SourceFile[], findInStrings: boolean, findInComments: boolean, implementations: boolean): ReferencedSymbol[];
-    function convertReferences(referenceSymbols: ReferencedSymbol[]): ReferenceEntry[];
-    function getReferenceEntriesForShorthandPropertyAssignment(node: Node, typeChecker: TypeChecker, result: ReferenceEntry[]): void;
-    function getReferenceEntryFromNode(node: Node): ReferenceEntry;
+    interface ImportsResult {
+        /** For every import of the symbol, the location and local symbol for the import. */
+        importSearches: Array<[Identifier, Symbol]>;
+        /** For rename imports/exports `{ foo as bar }`, `foo` is not a local, so it may be added as a reference immediately without further searching. */
+        singleReferences: Identifier[];
+        /** List of source files that may (or may not) use the symbol via a namespace. (For UMD modules this is every file.) */
+        indirectUsers: SourceFile[];
+    }
+    type ImportTracker = (exportSymbol: Symbol, exportInfo: ExportInfo, isForRename: boolean) => ImportsResult;
+    /** Creates the imports map and returns an ImportTracker that uses it. Call this lazily to avoid calling `getDirectImportsMap` unnecessarily.  */
+    function createImportTracker(sourceFiles: SourceFile[], checker: TypeChecker, cancellationToken: CancellationToken): ImportTracker;
+    /** Info about an exported symbol to perform recursive search on. */
+    interface ExportInfo {
+        exportingModuleSymbol: Symbol;
+        exportKind: ExportKind;
+    }
+    const enum ExportKind {
+        Named = 0,
+        Default = 1,
+        ExportEquals = 2,
+    }
+    const enum ImportExport {
+        Import = 0,
+        Export = 1,
+    }
+    type ModuleReference = {
+        kind: "import";
+        literal: StringLiteral;
+    } | {
+        kind: "reference";
+        referencingFile: SourceFile;
+        ref: FileReference;
+    };
+    function findModuleReferences(program: Program, sourceFiles: SourceFile[], searchModuleSymbol: Symbol): ModuleReference[];
+    interface ImportedSymbol {
+        kind: ImportExport.Import;
+        symbol: Symbol;
+        isNamedImport: boolean;
+    }
+    interface ExportedSymbol {
+        kind: ImportExport.Export;
+        symbol: Symbol;
+        exportInfo: ExportInfo;
+    }
+    /**
+     * Given a local reference, we might notice that it's an import/export and recursively search for references of that.
+     * If at an import, look locally for the symbol it imports.
+     * If an an export, look for all imports of it.
+     * This doesn't handle export specifiers; that is done in `getReferencesAtExportSpecifier`.
+     * @param comingFromExport If we are doing a search for all exports, don't bother looking backwards for the imported symbol, since that's the reason we're here.
+     */
+    function getImportOrExportSymbol(node: Node, symbol: Symbol, checker: TypeChecker, comingFromExport: boolean): ImportedSymbol | ExportedSymbol | undefined;
+    function getExportInfo(exportSymbol: Symbol, exportKind: ExportKind, checker: TypeChecker): ExportInfo | undefined;
+}
+declare namespace ts.FindAllReferences {
+    interface SymbolAndEntries {
+        definition: Definition | undefined;
+        references: Entry[];
+    }
+    type Definition = {
+        type: "symbol";
+        symbol: Symbol;
+        node: Node;
+    } | {
+        type: "label";
+        node: Identifier;
+    } | {
+        type: "keyword";
+        node: ts.Node;
+    } | {
+        type: "this";
+        node: ts.Node;
+    } | {
+        type: "string";
+        node: ts.StringLiteral;
+    };
+    type Entry = NodeEntry | SpanEntry;
+    interface NodeEntry {
+        type: "node";
+        node: Node;
+        isInString?: true;
+    }
+    interface SpanEntry {
+        type: "span";
+        fileName: string;
+        textSpan: TextSpan;
+    }
+    function nodeEntry(node: ts.Node, isInString?: true): NodeEntry;
+    interface Options {
+        readonly findInStrings?: boolean;
+        readonly findInComments?: boolean;
+        /**
+         * True if we are renaming the symbol.
+         * If so, we will find fewer references -- if it is referenced by several different names, we sill only find references for the original name.
+         */
+        readonly isForRename?: boolean;
+        /** True if we are searching for implementations. We will have a different method of adding references if so. */
+        readonly implementations?: boolean;
+    }
+    function findReferencedSymbols(program: Program, cancellationToken: CancellationToken, sourceFiles: SourceFile[], sourceFile: SourceFile, position: number): ReferencedSymbol[] | undefined;
+    function getImplementationsAtPosition(program: Program, cancellationToken: CancellationToken, sourceFiles: SourceFile[], sourceFile: SourceFile, position: number): ImplementationLocation[];
+    function findReferencedEntries(program: Program, cancellationToken: CancellationToken, sourceFiles: SourceFile[], sourceFile: SourceFile, position: number, options?: Options): ReferenceEntry[] | undefined;
+    function getReferenceEntriesForNode(node: Node, program: Program, sourceFiles: SourceFile[], cancellationToken: CancellationToken, options?: Options): Entry[] | undefined;
+    function toHighlightSpan(entry: FindAllReferences.Entry): {
+        fileName: string;
+        span: HighlightSpan;
+    };
+}
+/** Encapsulates the core find-all-references algorithm. */
+declare namespace ts.FindAllReferences.Core {
+    /** Core find-all-references algorithm. Handles special cases before delegating to `getReferencedSymbolsForSymbol`. */
+    function getReferencedSymbolsForNode(node: Node, program: Program, sourceFiles: SourceFile[], cancellationToken: CancellationToken, options?: Options): SymbolAndEntries[] | undefined;
+    function getReferenceEntriesForShorthandPropertyAssignment(node: Node, checker: TypeChecker, addReference: (node: Node) => void): void;
 }
 declare namespace ts.GoToDefinition {
     function getDefinitionAtPosition(program: Program, sourceFile: SourceFile, position: number): DefinitionInfo[];
     function getTypeDefinitionAtPosition(typeChecker: TypeChecker, sourceFile: SourceFile, position: number): DefinitionInfo[];
 }
-declare namespace ts.GoToImplementation {
-    function getImplementationAtPosition(typeChecker: TypeChecker, cancellationToken: CancellationToken, sourceFiles: SourceFile[], node: Node): ImplementationLocation[];
-}
 declare namespace ts.JsDoc {
-    function getJsDocCommentsFromDeclarations(declarations: Declaration[], name: string, canUseParsedParamTagComments: boolean): SymbolDisplayPart[];
-    function getAllJsDocCompletionEntries(): CompletionEntry[];
+    function getJsDocCommentsFromDeclarations(declarations?: Declaration[]): SymbolDisplayPart[];
+    function getJsDocTagsFromDeclarations(declarations?: Declaration[]): JSDocTagInfo[];
+    function getJSDocTagNameCompletions(): CompletionEntry[];
+    function getJSDocTagCompletions(): CompletionEntry[];
+    function getJSDocParameterNameCompletions(tag: JSDocParameterTag): CompletionEntry[];
     /**
      * Checks if position points to a valid position to add JSDoc comments, and if so,
      * returns the appropriate template. Otherwise returns an empty string.
@@ -9801,16 +12554,17 @@ declare namespace ts.JsTyping {
         readFile: (path: string, encoding?: string) => string;
         readDirectory: (rootDir: string, extensions: string[], excludes: string[], includes: string[], depth?: number) => string[];
     }
+    const nodeCoreModuleList: ReadonlyArray<string>;
     /**
      * @param host is the object providing I/O related operations.
      * @param fileNames are the file names that belong to the same project
      * @param projectRootPath is the path to the project root directory
      * @param safeListPath is the path used to retrieve the safe list
      * @param packageNameToTypingLocation is the map of package names to their cached typing locations
-     * @param typingOptions are used to customize the typing inference process
+     * @param typeAcquisition is used to customize the typing acquisition process
      * @param compilerOptions are used as a source for typing inference
      */
-    function discoverTypings(host: TypingResolutionHost, fileNames: string[], projectRootPath: Path, safeListPath: Path, packageNameToTypingLocation: Map<string>, typingOptions: TypingOptions, compilerOptions: CompilerOptions): {
+    function discoverTypings(host: TypingResolutionHost, fileNames: string[], projectRootPath: Path, safeListPath: Path, packageNameToTypingLocation: Map<string>, typeAcquisition: TypeAcquisition, unresolvedImports: ReadonlyArray<string>): {
         cachedTypingPaths: string[];
         newTypingNames: string[];
         filesToWatch: string[];
@@ -9820,10 +12574,11 @@ declare namespace ts.NavigateTo {
     function getNavigateToItems(sourceFiles: SourceFile[], checker: TypeChecker, cancellationToken: CancellationToken, searchValue: string, maxResultCount: number, excludeDtsFiles: boolean): NavigateToItem[];
 }
 declare namespace ts.NavigationBar {
-    function getNavigationBarItems(sourceFile: SourceFile): NavigationBarItem[];
+    function getNavigationBarItems(sourceFile: SourceFile, cancellationToken: CancellationToken): NavigationBarItem[];
+    function getNavigationTree(sourceFile: SourceFile, cancellationToken: CancellationToken): NavigationTree;
 }
 declare namespace ts.OutliningElementsCollector {
-    function collectElements(sourceFile: SourceFile): OutliningSpan[];
+    function collectElements(sourceFile: SourceFile, cancellationToken: CancellationToken): OutliningSpan[];
 }
 declare namespace ts {
     enum PatternMatchKind {
@@ -9858,6 +12613,7 @@ declare namespace ts.SignatureHelp {
         TypeArguments = 0,
         CallArguments = 1,
         TaggedTemplateArguments = 2,
+        JSXAttributesArguments = 3,
     }
     interface ArgumentListInfo {
         kind: ArgumentListKind;
@@ -9867,15 +12623,21 @@ declare namespace ts.SignatureHelp {
         argumentCount: number;
     }
     function getSignatureHelpItems(program: Program, sourceFile: SourceFile, position: number, cancellationToken: CancellationToken): SignatureHelpItems;
+    /**
+     * Returns relevant information for the argument list and the current argument if we are
+     * in the argument of an invocation; returns undefined otherwise.
+     */
+    function getImmediatelyContainingArgumentInfo(node: Node, position: number, sourceFile: SourceFile): ArgumentListInfo;
     function getContainingArgumentInfo(node: Node, position: number, sourceFile: SourceFile): ArgumentListInfo;
 }
 declare namespace ts.SymbolDisplay {
-    function getSymbolKind(typeChecker: TypeChecker, symbol: Symbol, location: Node): string;
+    function getSymbolKind(typeChecker: TypeChecker, symbol: Symbol, location: Node): ScriptElementKind;
     function getSymbolModifiers(symbol: Symbol): string;
     function getSymbolDisplayPartsDocumentationAndSymbolKind(typeChecker: TypeChecker, symbol: Symbol, sourceFile: SourceFile, enclosingDeclaration: Node, location: Node, semanticMeaning?: SemanticMeaning): {
         displayParts: SymbolDisplayPart[];
         documentation: SymbolDisplayPart[];
-        symbolKind: string;
+        symbolKind: ScriptElementKind;
+        tags: JSDocTagInfo[];
     };
 }
 declare namespace ts {
@@ -9885,6 +12647,7 @@ declare namespace ts {
         reportDiagnostics?: boolean;
         moduleName?: string;
         renamedDependencies?: MapLike<string>;
+        transformers?: CustomTransformers;
     }
     interface TranspileOutput {
         outputText: string;
@@ -9893,6 +12656,8 @@ declare namespace ts {
     }
     function transpileModule(input: string, transpileOptions: TranspileOptions): TranspileOutput;
     function transpile(input: string, compilerOptions?: CompilerOptions, fileName?: string, diagnostics?: Diagnostic[], moduleName?: string): string;
+    /** JS users may pass in string values for enum compiler options (such as ModuleKind), so convert. */
+    function fixupCompilerOptions(options: CompilerOptions, diagnostics: Diagnostic[]): CompilerOptions;
 }
 declare namespace ts.formatting {
     interface FormattingScanner {
@@ -9904,12 +12669,13 @@ declare namespace ts.formatting {
         skipToEndOf(node: Node): void;
         close(): void;
     }
-    function getFormattingScanner(sourceFile: SourceFile, startPos: number, endPos: number): FormattingScanner;
+    function getFormattingScanner(text: string, languageVariant: LanguageVariant, startPos: number, endPos: number): FormattingScanner;
 }
 declare namespace ts.formatting {
     class FormattingContext {
-        sourceFile: SourceFile;
+        readonly sourceFile: SourceFileLike;
         formattingRequestKind: FormattingRequestKind;
+        options: ts.FormatCodeSettings;
         currentTokenSpan: TextRangeWithKind;
         nextTokenSpan: TextRangeWithKind;
         contextNode: Node;
@@ -9920,7 +12686,7 @@ declare namespace ts.formatting {
         private tokensAreOnSameLine;
         private contextNodeBlockIsOnOneLine;
         private nextNodeBlockIsOnOneLine;
-        constructor(sourceFile: SourceFile, formattingRequestKind: FormattingRequestKind);
+        constructor(sourceFile: SourceFileLike, formattingRequestKind: FormattingRequestKind, options: ts.FormatCodeSettings);
         updateContext(currentRange: TextRangeWithKind, currentTokenParent: Node, nextRange: TextRangeWithKind, nextTokenParent: Node, commonParent: Node): void;
         ContextNodeAllOnSameLine(): boolean;
         NextNodeAllOnSameLine(): boolean;
@@ -10037,9 +12803,11 @@ declare namespace ts.formatting {
         SpaceAfterSubtractWhenFollowedByPredecrement: Rule;
         NoSpaceBeforeComma: Rule;
         SpaceAfterCertainKeywords: Rule;
+        NoSpaceAfterNewKeywordOnConstructorSignature: Rule;
         SpaceAfterLetConstInVariableDeclaration: Rule;
         NoSpaceBeforeOpenParenInFuncCall: Rule;
         SpaceAfterFunctionInFuncDecl: Rule;
+        SpaceBeforeOpenParenInFuncDecl: Rule;
         NoSpaceBeforeOpenParenInFuncDecl: Rule;
         SpaceAfterVoidOperator: Rule;
         NoSpaceBetweenReturnAndSemicolon: Rule;
@@ -10048,6 +12816,7 @@ declare namespace ts.formatting {
         SpaceAfterGetSetInMember: Rule;
         SpaceBeforeBinaryKeywordOperator: Rule;
         SpaceAfterBinaryKeywordOperator: Rule;
+        SpaceAfterConstructor: Rule;
         NoSpaceAfterConstructor: Rule;
         NoSpaceAfterModuleImport: Rule;
         SpaceAfterCertainTypeScriptKeywords: Rule;
@@ -10064,6 +12833,7 @@ declare namespace ts.formatting {
         NoSpaceAfterCloseAngularBracket: Rule;
         NoSpaceBetweenEmptyInterfaceBraceBrackets: Rule;
         HighPriorityCommonRules: Rule[];
+        UserConfigurableRules: Rule[];
         LowPriorityCommonRules: Rule[];
         SpaceAfterComma: Rule;
         NoSpaceAfterComma: Rule;
@@ -10121,13 +12891,19 @@ declare namespace ts.formatting {
         NoSpaceAfterEqualInJsxAttribute: Rule;
         NoSpaceAfterTypeAssertion: Rule;
         SpaceAfterTypeAssertion: Rule;
+        NoSpaceBeforeNonNullAssertionOperator: Rule;
         constructor();
+        static IsOptionEnabled(optionName: keyof FormatCodeSettings): (context: FormattingContext) => boolean;
+        static IsOptionDisabled(optionName: keyof FormatCodeSettings): (context: FormattingContext) => boolean;
+        static IsOptionDisabledOrUndefined(optionName: keyof FormatCodeSettings): (context: FormattingContext) => boolean;
+        static IsOptionEnabledOrUndefined(optionName: keyof FormatCodeSettings): (context: FormattingContext) => boolean;
         static IsForContext(context: FormattingContext): boolean;
         static IsNotForContext(context: FormattingContext): boolean;
         static IsBinaryOpContext(context: FormattingContext): boolean;
         static IsNotBinaryOpContext(context: FormattingContext): boolean;
         static IsConditionalOperatorContext(context: FormattingContext): boolean;
         static IsSameLineTokenOrBeforeMultilineBlockContext(context: FormattingContext): boolean;
+        static IsBraceWrappedContext(context: FormattingContext): boolean;
         static IsBeforeMultilineBlockContext(context: FormattingContext): boolean;
         static IsMultilineBlockContext(context: FormattingContext): boolean;
         static IsSingleLineBlockContext(context: FormattingContext): boolean;
@@ -10160,11 +12936,13 @@ declare namespace ts.formatting {
         static IsNotFormatOnEnter(context: FormattingContext): boolean;
         static IsModuleDeclContext(context: FormattingContext): boolean;
         static IsObjectTypeContext(context: FormattingContext): boolean;
+        static IsConstructorSignatureContext(context: FormattingContext): boolean;
         static IsTypeArgumentOrParameterOrAssertion(token: TextRangeWithKind, parent: Node): boolean;
         static IsTypeArgumentOrParameterOrAssertionContext(context: FormattingContext): boolean;
         static IsTypeAssertionContext(context: FormattingContext): boolean;
         static IsVoidOpContext(context: FormattingContext): boolean;
         static IsYieldOrYieldStarWithOperand(context: FormattingContext): boolean;
+        static IsNonNullAssertionContext(context: FormattingContext): boolean;
     }
 }
 declare namespace ts.formatting {
@@ -10202,56 +12980,29 @@ declare namespace ts.formatting {
 }
 declare namespace ts.formatting {
     namespace Shared {
-        interface ITokenAccess {
-            GetTokens(): SyntaxKind[];
-            Contains(token: SyntaxKind): boolean;
-        }
-        class TokenRangeAccess implements ITokenAccess {
-            private tokens;
-            constructor(from: SyntaxKind, to: SyntaxKind, except: SyntaxKind[]);
-            GetTokens(): SyntaxKind[];
-            Contains(token: SyntaxKind): boolean;
-        }
-        class TokenValuesAccess implements ITokenAccess {
-            private tokens;
-            constructor(tks: SyntaxKind[]);
+        interface TokenRange {
             GetTokens(): SyntaxKind[];
             Contains(token: SyntaxKind): boolean;
+            isSpecific(): boolean;
         }
-        class TokenSingleValueAccess implements ITokenAccess {
-            token: SyntaxKind;
-            constructor(token: SyntaxKind);
-            GetTokens(): SyntaxKind[];
-            Contains(tokenValue: SyntaxKind): boolean;
-        }
-        class TokenAllAccess implements ITokenAccess {
-            GetTokens(): SyntaxKind[];
-            Contains(tokenValue: SyntaxKind): boolean;
-            toString(): string;
-        }
-        class TokenRange {
-            tokenAccess: ITokenAccess;
-            constructor(tokenAccess: ITokenAccess);
-            static FromToken(token: SyntaxKind): TokenRange;
-            static FromTokens(tokens: SyntaxKind[]): TokenRange;
-            static FromRange(f: SyntaxKind, to: SyntaxKind, except?: SyntaxKind[]): TokenRange;
-            static AllTokens(): TokenRange;
-            GetTokens(): SyntaxKind[];
-            Contains(token: SyntaxKind): boolean;
-            toString(): string;
-            static Any: TokenRange;
-            static AnyIncludingMultilineComments: TokenRange;
-            static Keywords: TokenRange;
-            static BinaryOperators: TokenRange;
-            static BinaryKeywordOperators: TokenRange;
-            static UnaryPrefixOperators: TokenRange;
-            static UnaryPrefixExpressions: TokenRange;
-            static UnaryPreincrementExpressions: TokenRange;
-            static UnaryPostincrementExpressions: TokenRange;
-            static UnaryPredecrementExpressions: TokenRange;
-            static UnaryPostdecrementExpressions: TokenRange;
-            static Comments: TokenRange;
-            static TypeNames: TokenRange;
+        namespace TokenRange {
+            function FromToken(token: SyntaxKind): TokenRange;
+            function FromTokens(tokens: SyntaxKind[]): TokenRange;
+            function FromRange(from: SyntaxKind, to: SyntaxKind, except?: SyntaxKind[]): TokenRange;
+            function AnyExcept(token: SyntaxKind): TokenRange;
+            const Any: TokenRange;
+            const AnyIncludingMultilineComments: TokenRange;
+            const Keywords: TokenRange;
+            const BinaryOperators: TokenRange;
+            const BinaryKeywordOperators: TokenRange;
+            const UnaryPrefixOperators: TokenRange;
+            const UnaryPrefixExpressions: TokenRange;
+            const UnaryPreincrementExpressions: TokenRange;
+            const UnaryPostincrementExpressions: TokenRange;
+            const UnaryPredecrementExpressions: TokenRange;
+            const UnaryPostdecrementExpressions: TokenRange;
+            const Comments: TokenRange;
+            const TypeNames: TokenRange;
         }
     }
 }
@@ -10259,14 +13010,13 @@ declare namespace ts.formatting {
     class RulesProvider {
         private globalRules;
         private options;
-        private activeRules;
         private rulesMap;
         constructor();
         getRuleName(rule: Rule): string;
         getRuleByName(name: string): Rule;
         getRulesMap(): RulesMap;
+        getFormatOptions(): Readonly<ts.FormatCodeSettings>;
         ensureUpToDate(options: ts.FormatCodeSettings): void;
-        private createActiveRules(options);
     }
 }
 declare namespace ts.formatting {
@@ -10283,23 +13033,206 @@ declare namespace ts.formatting {
     function formatOnClosingCurly(position: number, sourceFile: SourceFile, rulesProvider: RulesProvider, options: FormatCodeSettings): TextChange[];
     function formatDocument(sourceFile: SourceFile, rulesProvider: RulesProvider, options: FormatCodeSettings): TextChange[];
     function formatSelection(start: number, end: number, sourceFile: SourceFile, rulesProvider: RulesProvider, options: FormatCodeSettings): TextChange[];
+    function formatNode(node: Node, sourceFileLike: SourceFileLike, languageVariant: LanguageVariant, initialIndentation: number, delta: number, rulesProvider: RulesProvider): TextChange[];
     function getIndentationString(indentation: number, options: EditorSettings): string;
 }
 declare namespace ts.formatting {
     namespace SmartIndenter {
-        function getIndentation(position: number, sourceFile: SourceFile, options: EditorSettings): number;
+        /**
+         * Computed indentation for a given position in source file
+         * @param position - position in file
+         * @param sourceFile - target source file
+         * @param options - set of editor options that control indentation
+         * @param assumeNewLineBeforeCloseBrace - false when getIndentation is called on the text from the real source file.
+         * true - when we need to assume that position is on the newline. This is usefult for codefixes, i.e.
+         * function f() {
+         * |}
+         * when inserting some text after open brace we would like to get the value of indentation as if newline was already there.
+         * However by default indentation at position | will be 0 so 'assumeNewLineBeforeCloseBrace' allows to override this behavior,
+         */
+        function getIndentation(position: number, sourceFile: SourceFile, options: EditorSettings, assumeNewLineBeforeCloseBrace?: boolean): number;
         function getIndentationForNode(n: Node, ignoreActualIndentationRange: TextRange, sourceFile: SourceFile, options: EditorSettings): number;
         function getBaseIndentation(options: EditorSettings): number;
-        function childStartsOnTheSameLineWithElseInIfStatement(parent: Node, child: TextRangeWithKind, childStartLine: number, sourceFile: SourceFile): boolean;
-        function findFirstNonWhitespaceCharacterAndColumn(startPos: number, endPos: number, sourceFile: SourceFile, options: EditorSettings): {
+        function childStartsOnTheSameLineWithElseInIfStatement(parent: Node, child: TextRangeWithKind, childStartLine: number, sourceFile: SourceFileLike): boolean;
+        function getContainingList(node: Node, sourceFile: SourceFile): NodeArray<Node>;
+        function findFirstNonWhitespaceCharacterAndColumn(startPos: number, endPos: number, sourceFile: SourceFileLike, options: EditorSettings): {
             column: number;
             character: number;
         };
-        function findFirstNonWhitespaceColumn(startPos: number, endPos: number, sourceFile: SourceFile, options: EditorSettings): number;
+        function findFirstNonWhitespaceColumn(startPos: number, endPos: number, sourceFile: SourceFileLike, options: EditorSettings): number;
         function nodeWillIndentChild(parent: TextRangeWithKind, child: TextRangeWithKind, indentByDefault: boolean): boolean;
         function shouldIndentChildNode(parent: TextRangeWithKind, child?: TextRangeWithKind): boolean;
     }
 }
+declare namespace ts.textChanges {
+    interface ConfigurableStart {
+        useNonAdjustedStartPosition?: boolean;
+    }
+    interface ConfigurableEnd {
+        useNonAdjustedEndPosition?: boolean;
+    }
+    enum Position {
+        FullStart = 0,
+        Start = 1,
+    }
+    /**
+     * Usually node.pos points to a position immediately after the previous token.
+     * If this position is used as a beginning of the span to remove - it might lead to removing the trailing trivia of the previous node, i.e:
+     * const x; // this is x
+     *        ^ - pos for the next variable declaration will point here
+     * const y; // this is y
+     *        ^ - end for previous variable declaration
+     * Usually leading trivia of the variable declaration 'y' should not include trailing trivia (whitespace, comment 'this is x' and newline) from the preceding
+     * variable declaration and trailing trivia for 'y' should include (whitespace, comment 'this is y', newline).
+     * By default when removing nodes we adjust start and end positions to respect specification of the trivia above.
+     * If pos\end should be interpreted literally 'useNonAdjustedStartPosition' or 'useNonAdjustedEndPosition' should be set to true
+     */
+    type ConfigurableStartEnd = ConfigurableStart & ConfigurableEnd;
+    interface InsertNodeOptions {
+        /**
+         * Text to be inserted before the new node
+         */
+        prefix?: string;
+        /**
+         * Text to be inserted after the new node
+         */
+        suffix?: string;
+        /**
+         * Text of inserted node will be formatted with this indentation, otherwise indentation will be inferred from the old node
+         */
+        indentation?: number;
+        /**
+         * Text of inserted node will be formatted with this delta, otherwise delta will be inferred from the new node kind
+         */
+        delta?: number;
+    }
+    type ChangeNodeOptions = ConfigurableStartEnd & InsertNodeOptions;
+    function getSeparatorCharacter(separator: Token<SyntaxKind.CommaToken | SyntaxKind.SemicolonToken>): string;
+    function getAdjustedStartPosition(sourceFile: SourceFile, node: Node, options: ConfigurableStart, position: Position): number;
+    function getAdjustedEndPosition(sourceFile: SourceFile, node: Node, options: ConfigurableEnd): number;
+    class ChangeTracker {
+        private readonly newLine;
+        private readonly rulesProvider;
+        private readonly validator;
+        private changes;
+        private readonly newLineCharacter;
+        static fromCodeFixContext(context: {
+            newLineCharacter: string;
+            rulesProvider: formatting.RulesProvider;
+        }): ChangeTracker;
+        constructor(newLine: NewLineKind, rulesProvider: formatting.RulesProvider, validator?: (text: NonFormattedText) => void);
+        deleteNode(sourceFile: SourceFile, node: Node, options?: ConfigurableStartEnd): this;
+        deleteRange(sourceFile: SourceFile, range: TextRange): this;
+        deleteNodeRange(sourceFile: SourceFile, startNode: Node, endNode: Node, options?: ConfigurableStartEnd): this;
+        deleteNodeInList(sourceFile: SourceFile, node: Node): this;
+        replaceRange(sourceFile: SourceFile, range: TextRange, newNode: Node, options?: InsertNodeOptions): this;
+        replaceNode(sourceFile: SourceFile, oldNode: Node, newNode: Node, options?: ChangeNodeOptions): this;
+        replaceNodeRange(sourceFile: SourceFile, startNode: Node, endNode: Node, newNode: Node, options?: ChangeNodeOptions): this;
+        insertNodeAt(sourceFile: SourceFile, pos: number, newNode: Node, options?: InsertNodeOptions): this;
+        insertNodeBefore(sourceFile: SourceFile, before: Node, newNode: Node, options?: InsertNodeOptions & ConfigurableStart): this;
+        insertNodeAfter(sourceFile: SourceFile, after: Node, newNode: Node, options?: InsertNodeOptions & ConfigurableEnd): this;
+        /**
+         * This function should be used to insert nodes in lists when nodes don't carry separators as the part of the node range,
+         * i.e. arguments in arguments lists, parameters in parameter lists etc.
+         * Note that separators are part of the node in statements and class elements.
+         */
+        insertNodeInListAfter(sourceFile: SourceFile, after: Node, newNode: Node): this;
+        getChanges(): FileTextChanges[];
+        private computeSpan(change, _sourceFile);
+        private computeNewText(change, sourceFile);
+        private static normalize(changes);
+    }
+    interface NonFormattedText {
+        readonly text: string;
+        readonly node: Node;
+    }
+    function getNonformattedText(node: Node, sourceFile: SourceFile | undefined, newLine: NewLineKind): NonFormattedText;
+    function applyFormatting(nonFormattedText: NonFormattedText, sourceFile: SourceFile, initialIndentation: number, delta: number, rulesProvider: formatting.RulesProvider): string;
+    function applyChanges(text: string, changes: TextChange[]): string;
+}
+declare namespace ts {
+    interface CodeFix {
+        errorCodes: number[];
+        getCodeActions(context: CodeFixContext): CodeAction[] | undefined;
+    }
+    interface CodeFixContext {
+        errorCode: number;
+        sourceFile: SourceFile;
+        span: TextSpan;
+        program: Program;
+        newLineCharacter: string;
+        host: LanguageServiceHost;
+        cancellationToken: CancellationToken;
+        rulesProvider: formatting.RulesProvider;
+    }
+    namespace codefix {
+        function registerCodeFix(codeFix: CodeFix): void;
+        function getSupportedErrorCodes(): string[];
+        function getFixes(context: CodeFixContext): CodeAction[];
+    }
+}
+declare namespace ts {
+    interface Refactor {
+        /** An unique code associated with each refactor */
+        name: string;
+        /** Description of the refactor to display in the UI of the editor */
+        description: string;
+        /** Compute the associated code actions */
+        getEditsForAction(context: RefactorContext, actionName: string): RefactorEditInfo | undefined;
+        /** Compute (quickly) which actions are available here */
+        getAvailableActions(context: RefactorContext): ApplicableRefactorInfo[] | undefined;
+    }
+    interface RefactorContext {
+        file: SourceFile;
+        startPosition: number;
+        endPosition?: number;
+        program: Program;
+        newLineCharacter: string;
+        rulesProvider?: formatting.RulesProvider;
+        cancellationToken?: CancellationToken;
+    }
+    namespace refactor {
+        function registerRefactor(refactor: Refactor): void;
+        function getApplicableRefactors(context: RefactorContext): ApplicableRefactorInfo[] | undefined;
+        function getEditsForRefactor(context: RefactorContext, refactorName: string, actionName: string): RefactorEditInfo | undefined;
+    }
+}
+declare namespace ts.codefix {
+}
+declare namespace ts.codefix {
+}
+declare namespace ts.codefix {
+}
+declare namespace ts.codefix {
+}
+declare namespace ts.codefix {
+}
+declare namespace ts.codefix {
+}
+declare namespace ts.codefix {
+}
+declare namespace ts.codefix {
+}
+declare namespace ts.codefix {
+}
+declare namespace ts.codefix {
+}
+declare namespace ts.codefix {
+}
+declare namespace ts.codefix {
+    function newNodesToChanges(newNodes: Node[], insertAfter: Node, context: CodeFixContext): FileTextChanges[];
+    /**
+     * Finds members of the resolved type that are missing in the class pointed to by class decl
+     * and generates source code for the missing members.
+     * @param possiblyMissingSymbols The collection of symbols to filter and then get insertions for.
+     * @returns Empty string iff there are no member insertions.
+     */
+    function createMissingMemberNodes(classDeclaration: ClassLikeDeclaration, possiblyMissingSymbols: Symbol[], checker: TypeChecker): Node[];
+    function createMethodFromCallExpression(callExpression: CallExpression, methodName: string, includeTypeScriptSyntax: boolean, makeStatic: boolean): MethodDeclaration;
+    function createStubbedMethod(modifiers: Modifier[], name: PropertyName, optional: boolean, typeParameters: TypeParameterDeclaration[] | undefined, parameters: ParameterDeclaration[], returnType: TypeNode | undefined): MethodDeclaration;
+}
+declare namespace ts.refactor {
+}
 declare namespace ts {
     /** The version of the language service API */
     const servicesVersion = "0.5";
@@ -10310,16 +13243,32 @@ declare namespace ts {
     function toEditorSettings(options: EditorOptions | EditorSettings): EditorSettings;
     function displayPartsToString(displayParts: SymbolDisplayPart[]): string;
     function getDefaultCompilerOptions(): CompilerOptions;
+    function getSupportedCodeFixes(): string[];
     function createLanguageServiceSourceFile(fileName: string, scriptSnapshot: IScriptSnapshot, scriptTarget: ScriptTarget, version: string, setNodeParents: boolean, scriptKind?: ScriptKind): SourceFile;
     let disableIncrementalParsing: boolean;
     function updateLanguageServiceSourceFile(sourceFile: SourceFile, scriptSnapshot: IScriptSnapshot, version: string, textChangeRange: TextChangeRange, aggressiveChecks?: boolean): SourceFile;
+    /** A cancellation that throttles calls to the host */
+    class ThrottledCancellationToken implements CancellationToken {
+        private hostCancellationToken;
+        private readonly throttleWaitMilliseconds;
+        private lastCancellationCheckTime;
+        constructor(hostCancellationToken: HostCancellationToken, throttleWaitMilliseconds?: number);
+        isCancellationRequested(): boolean;
+        throwIfCancellationRequested(): void;
+    }
     function createLanguageService(host: LanguageServiceHost, documentRegistry?: DocumentRegistry): LanguageService;
+    /** Names in the name table are escaped, so an identifier `__foo` will have a name table entry `___foo`. */
     function getNameTable(sourceFile: SourceFile): Map<number>;
     /**
-      * Get the path of the default library files (lib.d.ts) as distributed with the typescript
-      * node package.
-      * The functionality is not supported if the ts module is consumed outside of a node module.
-      */
+     * Returns the containing object literal property declaration given a possible name node, e.g. "a" in x = { "a": 1 }
+     */
+    function getContainingObjectLiteralElement(node: Node): ObjectLiteralElement;
+    function getPropertySymbolsFromContextualType(typeChecker: TypeChecker, node: ObjectLiteralElement): Symbol[];
+    /**
+     * Get the path of the default library files (lib.d.ts) as distributed with the typescript
+     * node package.
+     * The functionality is not supported if the ts module is consumed outside of a node module.
+     */
     function getDefaultLibFilePath(options: CompilerOptions): string;
 }
 declare namespace ts.BreakpointResolver {
@@ -10341,7 +13290,7 @@ declare namespace ts {
          *
          * Or undefined value if there was no change.
          */
-        getChangeRange(oldSnapshot: ScriptSnapshotShim): string;
+        getChangeRange(oldSnapshot: ScriptSnapshotShim): string | undefined;
         /** Releases all resources held by this script snapshot */
         dispose?(): void;
     }
@@ -10350,7 +13299,7 @@ declare namespace ts {
         trace(s: string): void;
         error(s: string): void;
     }
-    /** Public interface of the host of a language service shim instance.*/
+    /** Public interface of the host of a language service shim instance. */
     interface LanguageServiceShimHost extends Logger {
         getCompilationSettings(): string;
         /** Returns a JSON-encoded value of the type: string[] */
@@ -10406,11 +13355,11 @@ declare namespace ts {
         unregisterShim(shim: Shim): void;
     }
     interface Shim {
-        dispose(dummy: any): void;
+        dispose(_dummy: any): void;
     }
     interface LanguageServiceShim extends Shim {
         languageService: LanguageService;
-        dispose(dummy: any): void;
+        dispose(_dummy: any): void;
         refresh(throwOnError: boolean): void;
         cleanupSemanticCache(): void;
         getSyntacticDiagnostics(fileName: string): string;
@@ -10489,6 +13438,8 @@ declare namespace ts {
          * { text: string; kind: string; kindModifiers: string; bolded: boolean; grayed: boolean; indent: number; spans: { start: number; length: number; }[]; childItems: <recursive use of this type>[] } [] = [];
          */
         getNavigationBarItems(fileName: string): string;
+        /** Returns a JSON-encoded value of the type ts.NavigationTree. */
+        getNavigationTree(fileName: string): string;
         /**
          * Returns a JSON-encoded value of the type:
          * { textSpan: { start: number, length: number }; hintSpan: { start: number, length: number }; bannerText: string; autoCollapse: boolean } [] = [];
@@ -10529,7 +13480,7 @@ declare namespace ts {
         private files;
         private loggingEnabled;
         private tracingEnabled;
-        resolveModuleNames: (moduleName: string[], containingFile: string) => ResolvedModule[];
+        resolveModuleNames: (moduleName: string[], containingFile: string) => ResolvedModuleFull[];
         resolveTypeReferenceDirectives: (typeDirectiveNames: string[], containingFile: string) => ResolvedTypeReferenceDirective[];
         directoryExists: (directoryName: string) => boolean;
         constructor(shimHost: LanguageServiceShimHost);
@@ -10587,7 +13538,7 @@ declare namespace ts {
 declare namespace TypeScript.Services {
     const TypeScriptServicesFactory: typeof ts.TypeScriptServicesFactory;
 }
-declare const toolsVersion = "2.1";
+declare const toolsVersion = "2.5";
 /**
  * Sample: add a new utility function
  */
diff --git a/bin/typescript.js b/bin/typescript.js
index 4346c0f..e2df733 100644
--- a/bin/typescript.js
+++ b/bin/typescript.js
@@ -1,12 +1,26 @@
-var __extends = (this && this.__extends) || function (d, b) {
-    for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
-    function __() { this.constructor = d; }
-    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+var __assign = (this && this.__assign) || Object.assign || function(t) {
+    for (var s, i = 1, n = arguments.length; i < n; i++) {
+        s = arguments[i];
+        for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
+            t[p] = s[p];
+    }
+    return t;
 };
+var __extends = (this && this.__extends) || (function () {
+    var extendStatics = Object.setPrototypeOf ||
+        ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
+        function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
+    return function (d, b) {
+        extendStatics(d, b);
+        function __() { this.constructor = d; }
+        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+    };
+})();
 var ts;
 (function (ts) {
     // token > SyntaxKind.Identifer => token is a keyword
     // Also, If you add a new SyntaxKind be sure to keep the `Markers` section at the bottom in sync
+    var SyntaxKind;
     (function (SyntaxKind) {
         SyntaxKind[SyntaxKind["Unknown"] = 0] = "Unknown";
         SyntaxKind[SyntaxKind["EndOfFileToken"] = 1] = "EndOfFileToken";
@@ -22,346 +36,358 @@ var ts;
         // Literals
         SyntaxKind[SyntaxKind["NumericLiteral"] = 8] = "NumericLiteral";
         SyntaxKind[SyntaxKind["StringLiteral"] = 9] = "StringLiteral";
-        SyntaxKind[SyntaxKind["RegularExpressionLiteral"] = 10] = "RegularExpressionLiteral";
-        SyntaxKind[SyntaxKind["NoSubstitutionTemplateLiteral"] = 11] = "NoSubstitutionTemplateLiteral";
+        SyntaxKind[SyntaxKind["JsxText"] = 10] = "JsxText";
+        SyntaxKind[SyntaxKind["JsxTextAllWhiteSpaces"] = 11] = "JsxTextAllWhiteSpaces";
+        SyntaxKind[SyntaxKind["RegularExpressionLiteral"] = 12] = "RegularExpressionLiteral";
+        SyntaxKind[SyntaxKind["NoSubstitutionTemplateLiteral"] = 13] = "NoSubstitutionTemplateLiteral";
         // Pseudo-literals
-        SyntaxKind[SyntaxKind["TemplateHead"] = 12] = "TemplateHead";
-        SyntaxKind[SyntaxKind["TemplateMiddle"] = 13] = "TemplateMiddle";
-        SyntaxKind[SyntaxKind["TemplateTail"] = 14] = "TemplateTail";
+        SyntaxKind[SyntaxKind["TemplateHead"] = 14] = "TemplateHead";
+        SyntaxKind[SyntaxKind["TemplateMiddle"] = 15] = "TemplateMiddle";
+        SyntaxKind[SyntaxKind["TemplateTail"] = 16] = "TemplateTail";
         // Punctuation
-        SyntaxKind[SyntaxKind["OpenBraceToken"] = 15] = "OpenBraceToken";
-        SyntaxKind[SyntaxKind["CloseBraceToken"] = 16] = "CloseBraceToken";
-        SyntaxKind[SyntaxKind["OpenParenToken"] = 17] = "OpenParenToken";
-        SyntaxKind[SyntaxKind["CloseParenToken"] = 18] = "CloseParenToken";
-        SyntaxKind[SyntaxKind["OpenBracketToken"] = 19] = "OpenBracketToken";
-        SyntaxKind[SyntaxKind["CloseBracketToken"] = 20] = "CloseBracketToken";
-        SyntaxKind[SyntaxKind["DotToken"] = 21] = "DotToken";
-        SyntaxKind[SyntaxKind["DotDotDotToken"] = 22] = "DotDotDotToken";
-        SyntaxKind[SyntaxKind["SemicolonToken"] = 23] = "SemicolonToken";
-        SyntaxKind[SyntaxKind["CommaToken"] = 24] = "CommaToken";
-        SyntaxKind[SyntaxKind["LessThanToken"] = 25] = "LessThanToken";
-        SyntaxKind[SyntaxKind["LessThanSlashToken"] = 26] = "LessThanSlashToken";
-        SyntaxKind[SyntaxKind["GreaterThanToken"] = 27] = "GreaterThanToken";
-        SyntaxKind[SyntaxKind["LessThanEqualsToken"] = 28] = "LessThanEqualsToken";
-        SyntaxKind[SyntaxKind["GreaterThanEqualsToken"] = 29] = "GreaterThanEqualsToken";
-        SyntaxKind[SyntaxKind["EqualsEqualsToken"] = 30] = "EqualsEqualsToken";
-        SyntaxKind[SyntaxKind["ExclamationEqualsToken"] = 31] = "ExclamationEqualsToken";
-        SyntaxKind[SyntaxKind["EqualsEqualsEqualsToken"] = 32] = "EqualsEqualsEqualsToken";
-        SyntaxKind[SyntaxKind["ExclamationEqualsEqualsToken"] = 33] = "ExclamationEqualsEqualsToken";
-        SyntaxKind[SyntaxKind["EqualsGreaterThanToken"] = 34] = "EqualsGreaterThanToken";
-        SyntaxKind[SyntaxKind["PlusToken"] = 35] = "PlusToken";
-        SyntaxKind[SyntaxKind["MinusToken"] = 36] = "MinusToken";
-        SyntaxKind[SyntaxKind["AsteriskToken"] = 37] = "AsteriskToken";
-        SyntaxKind[SyntaxKind["AsteriskAsteriskToken"] = 38] = "AsteriskAsteriskToken";
-        SyntaxKind[SyntaxKind["SlashToken"] = 39] = "SlashToken";
-        SyntaxKind[SyntaxKind["PercentToken"] = 40] = "PercentToken";
-        SyntaxKind[SyntaxKind["PlusPlusToken"] = 41] = "PlusPlusToken";
-        SyntaxKind[SyntaxKind["MinusMinusToken"] = 42] = "MinusMinusToken";
-        SyntaxKind[SyntaxKind["LessThanLessThanToken"] = 43] = "LessThanLessThanToken";
-        SyntaxKind[SyntaxKind["GreaterThanGreaterThanToken"] = 44] = "GreaterThanGreaterThanToken";
-        SyntaxKind[SyntaxKind["GreaterThanGreaterThanGreaterThanToken"] = 45] = "GreaterThanGreaterThanGreaterThanToken";
-        SyntaxKind[SyntaxKind["AmpersandToken"] = 46] = "AmpersandToken";
-        SyntaxKind[SyntaxKind["BarToken"] = 47] = "BarToken";
-        SyntaxKind[SyntaxKind["CaretToken"] = 48] = "CaretToken";
-        SyntaxKind[SyntaxKind["ExclamationToken"] = 49] = "ExclamationToken";
-        SyntaxKind[SyntaxKind["TildeToken"] = 50] = "TildeToken";
-        SyntaxKind[SyntaxKind["AmpersandAmpersandToken"] = 51] = "AmpersandAmpersandToken";
-        SyntaxKind[SyntaxKind["BarBarToken"] = 52] = "BarBarToken";
-        SyntaxKind[SyntaxKind["QuestionToken"] = 53] = "QuestionToken";
-        SyntaxKind[SyntaxKind["ColonToken"] = 54] = "ColonToken";
-        SyntaxKind[SyntaxKind["AtToken"] = 55] = "AtToken";
+        SyntaxKind[SyntaxKind["OpenBraceToken"] = 17] = "OpenBraceToken";
+        SyntaxKind[SyntaxKind["CloseBraceToken"] = 18] = "CloseBraceToken";
+        SyntaxKind[SyntaxKind["OpenParenToken"] = 19] = "OpenParenToken";
+        SyntaxKind[SyntaxKind["CloseParenToken"] = 20] = "CloseParenToken";
+        SyntaxKind[SyntaxKind["OpenBracketToken"] = 21] = "OpenBracketToken";
+        SyntaxKind[SyntaxKind["CloseBracketToken"] = 22] = "CloseBracketToken";
+        SyntaxKind[SyntaxKind["DotToken"] = 23] = "DotToken";
+        SyntaxKind[SyntaxKind["DotDotDotToken"] = 24] = "DotDotDotToken";
+        SyntaxKind[SyntaxKind["SemicolonToken"] = 25] = "SemicolonToken";
+        SyntaxKind[SyntaxKind["CommaToken"] = 26] = "CommaToken";
+        SyntaxKind[SyntaxKind["LessThanToken"] = 27] = "LessThanToken";
+        SyntaxKind[SyntaxKind["LessThanSlashToken"] = 28] = "LessThanSlashToken";
+        SyntaxKind[SyntaxKind["GreaterThanToken"] = 29] = "GreaterThanToken";
+        SyntaxKind[SyntaxKind["LessThanEqualsToken"] = 30] = "LessThanEqualsToken";
+        SyntaxKind[SyntaxKind["GreaterThanEqualsToken"] = 31] = "GreaterThanEqualsToken";
+        SyntaxKind[SyntaxKind["EqualsEqualsToken"] = 32] = "EqualsEqualsToken";
+        SyntaxKind[SyntaxKind["ExclamationEqualsToken"] = 33] = "ExclamationEqualsToken";
+        SyntaxKind[SyntaxKind["EqualsEqualsEqualsToken"] = 34] = "EqualsEqualsEqualsToken";
+        SyntaxKind[SyntaxKind["ExclamationEqualsEqualsToken"] = 35] = "ExclamationEqualsEqualsToken";
+        SyntaxKind[SyntaxKind["EqualsGreaterThanToken"] = 36] = "EqualsGreaterThanToken";
+        SyntaxKind[SyntaxKind["PlusToken"] = 37] = "PlusToken";
+        SyntaxKind[SyntaxKind["MinusToken"] = 38] = "MinusToken";
+        SyntaxKind[SyntaxKind["AsteriskToken"] = 39] = "AsteriskToken";
+        SyntaxKind[SyntaxKind["AsteriskAsteriskToken"] = 40] = "AsteriskAsteriskToken";
+        SyntaxKind[SyntaxKind["SlashToken"] = 41] = "SlashToken";
+        SyntaxKind[SyntaxKind["PercentToken"] = 42] = "PercentToken";
+        SyntaxKind[SyntaxKind["PlusPlusToken"] = 43] = "PlusPlusToken";
+        SyntaxKind[SyntaxKind["MinusMinusToken"] = 44] = "MinusMinusToken";
+        SyntaxKind[SyntaxKind["LessThanLessThanToken"] = 45] = "LessThanLessThanToken";
+        SyntaxKind[SyntaxKind["GreaterThanGreaterThanToken"] = 46] = "GreaterThanGreaterThanToken";
+        SyntaxKind[SyntaxKind["GreaterThanGreaterThanGreaterThanToken"] = 47] = "GreaterThanGreaterThanGreaterThanToken";
+        SyntaxKind[SyntaxKind["AmpersandToken"] = 48] = "AmpersandToken";
+        SyntaxKind[SyntaxKind["BarToken"] = 49] = "BarToken";
+        SyntaxKind[SyntaxKind["CaretToken"] = 50] = "CaretToken";
+        SyntaxKind[SyntaxKind["ExclamationToken"] = 51] = "ExclamationToken";
+        SyntaxKind[SyntaxKind["TildeToken"] = 52] = "TildeToken";
+        SyntaxKind[SyntaxKind["AmpersandAmpersandToken"] = 53] = "AmpersandAmpersandToken";
+        SyntaxKind[SyntaxKind["BarBarToken"] = 54] = "BarBarToken";
+        SyntaxKind[SyntaxKind["QuestionToken"] = 55] = "QuestionToken";
+        SyntaxKind[SyntaxKind["ColonToken"] = 56] = "ColonToken";
+        SyntaxKind[SyntaxKind["AtToken"] = 57] = "AtToken";
         // Assignments
-        SyntaxKind[SyntaxKind["EqualsToken"] = 56] = "EqualsToken";
-        SyntaxKind[SyntaxKind["PlusEqualsToken"] = 57] = "PlusEqualsToken";
-        SyntaxKind[SyntaxKind["MinusEqualsToken"] = 58] = "MinusEqualsToken";
-        SyntaxKind[SyntaxKind["AsteriskEqualsToken"] = 59] = "AsteriskEqualsToken";
-        SyntaxKind[SyntaxKind["AsteriskAsteriskEqualsToken"] = 60] = "AsteriskAsteriskEqualsToken";
-        SyntaxKind[SyntaxKind["SlashEqualsToken"] = 61] = "SlashEqualsToken";
-        SyntaxKind[SyntaxKind["PercentEqualsToken"] = 62] = "PercentEqualsToken";
-        SyntaxKind[SyntaxKind["LessThanLessThanEqualsToken"] = 63] = "LessThanLessThanEqualsToken";
-        SyntaxKind[SyntaxKind["GreaterThanGreaterThanEqualsToken"] = 64] = "GreaterThanGreaterThanEqualsToken";
-        SyntaxKind[SyntaxKind["GreaterThanGreaterThanGreaterThanEqualsToken"] = 65] = "GreaterThanGreaterThanGreaterThanEqualsToken";
-        SyntaxKind[SyntaxKind["AmpersandEqualsToken"] = 66] = "AmpersandEqualsToken";
-        SyntaxKind[SyntaxKind["BarEqualsToken"] = 67] = "BarEqualsToken";
-        SyntaxKind[SyntaxKind["CaretEqualsToken"] = 68] = "CaretEqualsToken";
+        SyntaxKind[SyntaxKind["EqualsToken"] = 58] = "EqualsToken";
+        SyntaxKind[SyntaxKind["PlusEqualsToken"] = 59] = "PlusEqualsToken";
+        SyntaxKind[SyntaxKind["MinusEqualsToken"] = 60] = "MinusEqualsToken";
+        SyntaxKind[SyntaxKind["AsteriskEqualsToken"] = 61] = "AsteriskEqualsToken";
+        SyntaxKind[SyntaxKind["AsteriskAsteriskEqualsToken"] = 62] = "AsteriskAsteriskEqualsToken";
+        SyntaxKind[SyntaxKind["SlashEqualsToken"] = 63] = "SlashEqualsToken";
+        SyntaxKind[SyntaxKind["PercentEqualsToken"] = 64] = "PercentEqualsToken";
+        SyntaxKind[SyntaxKind["LessThanLessThanEqualsToken"] = 65] = "LessThanLessThanEqualsToken";
+        SyntaxKind[SyntaxKind["GreaterThanGreaterThanEqualsToken"] = 66] = "GreaterThanGreaterThanEqualsToken";
+        SyntaxKind[SyntaxKind["GreaterThanGreaterThanGreaterThanEqualsToken"] = 67] = "GreaterThanGreaterThanGreaterThanEqualsToken";
+        SyntaxKind[SyntaxKind["AmpersandEqualsToken"] = 68] = "AmpersandEqualsToken";
+        SyntaxKind[SyntaxKind["BarEqualsToken"] = 69] = "BarEqualsToken";
+        SyntaxKind[SyntaxKind["CaretEqualsToken"] = 70] = "CaretEqualsToken";
         // Identifiers
-        SyntaxKind[SyntaxKind["Identifier"] = 69] = "Identifier";
+        SyntaxKind[SyntaxKind["Identifier"] = 71] = "Identifier";
         // Reserved words
-        SyntaxKind[SyntaxKind["BreakKeyword"] = 70] = "BreakKeyword";
-        SyntaxKind[SyntaxKind["CaseKeyword"] = 71] = "CaseKeyword";
-        SyntaxKind[SyntaxKind["CatchKeyword"] = 72] = "CatchKeyword";
-        SyntaxKind[SyntaxKind["ClassKeyword"] = 73] = "ClassKeyword";
-        SyntaxKind[SyntaxKind["ConstKeyword"] = 74] = "ConstKeyword";
-        SyntaxKind[SyntaxKind["ContinueKeyword"] = 75] = "ContinueKeyword";
-        SyntaxKind[SyntaxKind["DebuggerKeyword"] = 76] = "DebuggerKeyword";
-        SyntaxKind[SyntaxKind["DefaultKeyword"] = 77] = "DefaultKeyword";
-        SyntaxKind[SyntaxKind["DeleteKeyword"] = 78] = "DeleteKeyword";
-        SyntaxKind[SyntaxKind["DoKeyword"] = 79] = "DoKeyword";
-        SyntaxKind[SyntaxKind["ElseKeyword"] = 80] = "ElseKeyword";
-        SyntaxKind[SyntaxKind["EnumKeyword"] = 81] = "EnumKeyword";
-        SyntaxKind[SyntaxKind["ExportKeyword"] = 82] = "ExportKeyword";
-        SyntaxKind[SyntaxKind["ExtendsKeyword"] = 83] = "ExtendsKeyword";
-        SyntaxKind[SyntaxKind["FalseKeyword"] = 84] = "FalseKeyword";
-        SyntaxKind[SyntaxKind["FinallyKeyword"] = 85] = "FinallyKeyword";
-        SyntaxKind[SyntaxKind["ForKeyword"] = 86] = "ForKeyword";
-        SyntaxKind[SyntaxKind["FunctionKeyword"] = 87] = "FunctionKeyword";
-        SyntaxKind[SyntaxKind["IfKeyword"] = 88] = "IfKeyword";
-        SyntaxKind[SyntaxKind["ImportKeyword"] = 89] = "ImportKeyword";
-        SyntaxKind[SyntaxKind["InKeyword"] = 90] = "InKeyword";
-        SyntaxKind[SyntaxKind["InstanceOfKeyword"] = 91] = "InstanceOfKeyword";
-        SyntaxKind[SyntaxKind["NewKeyword"] = 92] = "NewKeyword";
-        SyntaxKind[SyntaxKind["NullKeyword"] = 93] = "NullKeyword";
-        SyntaxKind[SyntaxKind["ReturnKeyword"] = 94] = "ReturnKeyword";
-        SyntaxKind[SyntaxKind["SuperKeyword"] = 95] = "SuperKeyword";
-        SyntaxKind[SyntaxKind["SwitchKeyword"] = 96] = "SwitchKeyword";
-        SyntaxKind[SyntaxKind["ThisKeyword"] = 97] = "ThisKeyword";
-        SyntaxKind[SyntaxKind["ThrowKeyword"] = 98] = "ThrowKeyword";
-        SyntaxKind[SyntaxKind["TrueKeyword"] = 99] = "TrueKeyword";
-        SyntaxKind[SyntaxKind["TryKeyword"] = 100] = "TryKeyword";
-        SyntaxKind[SyntaxKind["TypeOfKeyword"] = 101] = "TypeOfKeyword";
-        SyntaxKind[SyntaxKind["VarKeyword"] = 102] = "VarKeyword";
-        SyntaxKind[SyntaxKind["VoidKeyword"] = 103] = "VoidKeyword";
-        SyntaxKind[SyntaxKind["WhileKeyword"] = 104] = "WhileKeyword";
-        SyntaxKind[SyntaxKind["WithKeyword"] = 105] = "WithKeyword";
+        SyntaxKind[SyntaxKind["BreakKeyword"] = 72] = "BreakKeyword";
+        SyntaxKind[SyntaxKind["CaseKeyword"] = 73] = "CaseKeyword";
+        SyntaxKind[SyntaxKind["CatchKeyword"] = 74] = "CatchKeyword";
+        SyntaxKind[SyntaxKind["ClassKeyword"] = 75] = "ClassKeyword";
+        SyntaxKind[SyntaxKind["ConstKeyword"] = 76] = "ConstKeyword";
+        SyntaxKind[SyntaxKind["ContinueKeyword"] = 77] = "ContinueKeyword";
+        SyntaxKind[SyntaxKind["DebuggerKeyword"] = 78] = "DebuggerKeyword";
+        SyntaxKind[SyntaxKind["DefaultKeyword"] = 79] = "DefaultKeyword";
+        SyntaxKind[SyntaxKind["DeleteKeyword"] = 80] = "DeleteKeyword";
+        SyntaxKind[SyntaxKind["DoKeyword"] = 81] = "DoKeyword";
+        SyntaxKind[SyntaxKind["ElseKeyword"] = 82] = "ElseKeyword";
+        SyntaxKind[SyntaxKind["EnumKeyword"] = 83] = "EnumKeyword";
+        SyntaxKind[SyntaxKind["ExportKeyword"] = 84] = "ExportKeyword";
+        SyntaxKind[SyntaxKind["ExtendsKeyword"] = 85] = "ExtendsKeyword";
+        SyntaxKind[SyntaxKind["FalseKeyword"] = 86] = "FalseKeyword";
+        SyntaxKind[SyntaxKind["FinallyKeyword"] = 87] = "FinallyKeyword";
+        SyntaxKind[SyntaxKind["ForKeyword"] = 88] = "ForKeyword";
+        SyntaxKind[SyntaxKind["FunctionKeyword"] = 89] = "FunctionKeyword";
+        SyntaxKind[SyntaxKind["IfKeyword"] = 90] = "IfKeyword";
+        SyntaxKind[SyntaxKind["ImportKeyword"] = 91] = "ImportKeyword";
+        SyntaxKind[SyntaxKind["InKeyword"] = 92] = "InKeyword";
+        SyntaxKind[SyntaxKind["InstanceOfKeyword"] = 93] = "InstanceOfKeyword";
+        SyntaxKind[SyntaxKind["NewKeyword"] = 94] = "NewKeyword";
+        SyntaxKind[SyntaxKind["NullKeyword"] = 95] = "NullKeyword";
+        SyntaxKind[SyntaxKind["ReturnKeyword"] = 96] = "ReturnKeyword";
+        SyntaxKind[SyntaxKind["SuperKeyword"] = 97] = "SuperKeyword";
+        SyntaxKind[SyntaxKind["SwitchKeyword"] = 98] = "SwitchKeyword";
+        SyntaxKind[SyntaxKind["ThisKeyword"] = 99] = "ThisKeyword";
+        SyntaxKind[SyntaxKind["ThrowKeyword"] = 100] = "ThrowKeyword";
+        SyntaxKind[SyntaxKind["TrueKeyword"] = 101] = "TrueKeyword";
+        SyntaxKind[SyntaxKind["TryKeyword"] = 102] = "TryKeyword";
+        SyntaxKind[SyntaxKind["TypeOfKeyword"] = 103] = "TypeOfKeyword";
+        SyntaxKind[SyntaxKind["VarKeyword"] = 104] = "VarKeyword";
+        SyntaxKind[SyntaxKind["VoidKeyword"] = 105] = "VoidKeyword";
+        SyntaxKind[SyntaxKind["WhileKeyword"] = 106] = "WhileKeyword";
+        SyntaxKind[SyntaxKind["WithKeyword"] = 107] = "WithKeyword";
         // Strict mode reserved words
-        SyntaxKind[SyntaxKind["ImplementsKeyword"] = 106] = "ImplementsKeyword";
-        SyntaxKind[SyntaxKind["InterfaceKeyword"] = 107] = "InterfaceKeyword";
-        SyntaxKind[SyntaxKind["LetKeyword"] = 108] = "LetKeyword";
-        SyntaxKind[SyntaxKind["PackageKeyword"] = 109] = "PackageKeyword";
-        SyntaxKind[SyntaxKind["PrivateKeyword"] = 110] = "PrivateKeyword";
-        SyntaxKind[SyntaxKind["ProtectedKeyword"] = 111] = "ProtectedKeyword";
-        SyntaxKind[SyntaxKind["PublicKeyword"] = 112] = "PublicKeyword";
-        SyntaxKind[SyntaxKind["StaticKeyword"] = 113] = "StaticKeyword";
-        SyntaxKind[SyntaxKind["YieldKeyword"] = 114] = "YieldKeyword";
+        SyntaxKind[SyntaxKind["ImplementsKeyword"] = 108] = "ImplementsKeyword";
+        SyntaxKind[SyntaxKind["InterfaceKeyword"] = 109] = "InterfaceKeyword";
+        SyntaxKind[SyntaxKind["LetKeyword"] = 110] = "LetKeyword";
+        SyntaxKind[SyntaxKind["PackageKeyword"] = 111] = "PackageKeyword";
+        SyntaxKind[SyntaxKind["PrivateKeyword"] = 112] = "PrivateKeyword";
+        SyntaxKind[SyntaxKind["ProtectedKeyword"] = 113] = "ProtectedKeyword";
+        SyntaxKind[SyntaxKind["PublicKeyword"] = 114] = "PublicKeyword";
+        SyntaxKind[SyntaxKind["StaticKeyword"] = 115] = "StaticKeyword";
+        SyntaxKind[SyntaxKind["YieldKeyword"] = 116] = "YieldKeyword";
         // Contextual keywords
-        SyntaxKind[SyntaxKind["AbstractKeyword"] = 115] = "AbstractKeyword";
-        SyntaxKind[SyntaxKind["AsKeyword"] = 116] = "AsKeyword";
-        SyntaxKind[SyntaxKind["AnyKeyword"] = 117] = "AnyKeyword";
-        SyntaxKind[SyntaxKind["AsyncKeyword"] = 118] = "AsyncKeyword";
-        SyntaxKind[SyntaxKind["AwaitKeyword"] = 119] = "AwaitKeyword";
-        SyntaxKind[SyntaxKind["BooleanKeyword"] = 120] = "BooleanKeyword";
-        SyntaxKind[SyntaxKind["ConstructorKeyword"] = 121] = "ConstructorKeyword";
-        SyntaxKind[SyntaxKind["DeclareKeyword"] = 122] = "DeclareKeyword";
-        SyntaxKind[SyntaxKind["GetKeyword"] = 123] = "GetKeyword";
-        SyntaxKind[SyntaxKind["IsKeyword"] = 124] = "IsKeyword";
-        SyntaxKind[SyntaxKind["ModuleKeyword"] = 125] = "ModuleKeyword";
-        SyntaxKind[SyntaxKind["NamespaceKeyword"] = 126] = "NamespaceKeyword";
-        SyntaxKind[SyntaxKind["NeverKeyword"] = 127] = "NeverKeyword";
-        SyntaxKind[SyntaxKind["ReadonlyKeyword"] = 128] = "ReadonlyKeyword";
-        SyntaxKind[SyntaxKind["RequireKeyword"] = 129] = "RequireKeyword";
-        SyntaxKind[SyntaxKind["NumberKeyword"] = 130] = "NumberKeyword";
-        SyntaxKind[SyntaxKind["SetKeyword"] = 131] = "SetKeyword";
-        SyntaxKind[SyntaxKind["StringKeyword"] = 132] = "StringKeyword";
-        SyntaxKind[SyntaxKind["SymbolKeyword"] = 133] = "SymbolKeyword";
-        SyntaxKind[SyntaxKind["TypeKeyword"] = 134] = "TypeKeyword";
-        SyntaxKind[SyntaxKind["UndefinedKeyword"] = 135] = "UndefinedKeyword";
-        SyntaxKind[SyntaxKind["FromKeyword"] = 136] = "FromKeyword";
-        SyntaxKind[SyntaxKind["GlobalKeyword"] = 137] = "GlobalKeyword";
-        SyntaxKind[SyntaxKind["OfKeyword"] = 138] = "OfKeyword";
+        SyntaxKind[SyntaxKind["AbstractKeyword"] = 117] = "AbstractKeyword";
+        SyntaxKind[SyntaxKind["AsKeyword"] = 118] = "AsKeyword";
+        SyntaxKind[SyntaxKind["AnyKeyword"] = 119] = "AnyKeyword";
+        SyntaxKind[SyntaxKind["AsyncKeyword"] = 120] = "AsyncKeyword";
+        SyntaxKind[SyntaxKind["AwaitKeyword"] = 121] = "AwaitKeyword";
+        SyntaxKind[SyntaxKind["BooleanKeyword"] = 122] = "BooleanKeyword";
+        SyntaxKind[SyntaxKind["ConstructorKeyword"] = 123] = "ConstructorKeyword";
+        SyntaxKind[SyntaxKind["DeclareKeyword"] = 124] = "DeclareKeyword";
+        SyntaxKind[SyntaxKind["GetKeyword"] = 125] = "GetKeyword";
+        SyntaxKind[SyntaxKind["IsKeyword"] = 126] = "IsKeyword";
+        SyntaxKind[SyntaxKind["KeyOfKeyword"] = 127] = "KeyOfKeyword";
+        SyntaxKind[SyntaxKind["ModuleKeyword"] = 128] = "ModuleKeyword";
+        SyntaxKind[SyntaxKind["NamespaceKeyword"] = 129] = "NamespaceKeyword";
+        SyntaxKind[SyntaxKind["NeverKeyword"] = 130] = "NeverKeyword";
+        SyntaxKind[SyntaxKind["ReadonlyKeyword"] = 131] = "ReadonlyKeyword";
+        SyntaxKind[SyntaxKind["RequireKeyword"] = 132] = "RequireKeyword";
+        SyntaxKind[SyntaxKind["NumberKeyword"] = 133] = "NumberKeyword";
+        SyntaxKind[SyntaxKind["ObjectKeyword"] = 134] = "ObjectKeyword";
+        SyntaxKind[SyntaxKind["SetKeyword"] = 135] = "SetKeyword";
+        SyntaxKind[SyntaxKind["StringKeyword"] = 136] = "StringKeyword";
+        SyntaxKind[SyntaxKind["SymbolKeyword"] = 137] = "SymbolKeyword";
+        SyntaxKind[SyntaxKind["TypeKeyword"] = 138] = "TypeKeyword";
+        SyntaxKind[SyntaxKind["UndefinedKeyword"] = 139] = "UndefinedKeyword";
+        SyntaxKind[SyntaxKind["FromKeyword"] = 140] = "FromKeyword";
+        SyntaxKind[SyntaxKind["GlobalKeyword"] = 141] = "GlobalKeyword";
+        SyntaxKind[SyntaxKind["OfKeyword"] = 142] = "OfKeyword";
         // Parse tree nodes
         // Names
-        SyntaxKind[SyntaxKind["QualifiedName"] = 139] = "QualifiedName";
-        SyntaxKind[SyntaxKind["ComputedPropertyName"] = 140] = "ComputedPropertyName";
+        SyntaxKind[SyntaxKind["QualifiedName"] = 143] = "QualifiedName";
+        SyntaxKind[SyntaxKind["ComputedPropertyName"] = 144] = "ComputedPropertyName";
         // Signature elements
-        SyntaxKind[SyntaxKind["TypeParameter"] = 141] = "TypeParameter";
-        SyntaxKind[SyntaxKind["Parameter"] = 142] = "Parameter";
-        SyntaxKind[SyntaxKind["Decorator"] = 143] = "Decorator";
+        SyntaxKind[SyntaxKind["TypeParameter"] = 145] = "TypeParameter";
+        SyntaxKind[SyntaxKind["Parameter"] = 146] = "Parameter";
+        SyntaxKind[SyntaxKind["Decorator"] = 147] = "Decorator";
         // TypeMember
-        SyntaxKind[SyntaxKind["PropertySignature"] = 144] = "PropertySignature";
-        SyntaxKind[SyntaxKind["PropertyDeclaration"] = 145] = "PropertyDeclaration";
-        SyntaxKind[SyntaxKind["MethodSignature"] = 146] = "MethodSignature";
-        SyntaxKind[SyntaxKind["MethodDeclaration"] = 147] = "MethodDeclaration";
-        SyntaxKind[SyntaxKind["Constructor"] = 148] = "Constructor";
-        SyntaxKind[SyntaxKind["GetAccessor"] = 149] = "GetAccessor";
-        SyntaxKind[SyntaxKind["SetAccessor"] = 150] = "SetAccessor";
-        SyntaxKind[SyntaxKind["CallSignature"] = 151] = "CallSignature";
-        SyntaxKind[SyntaxKind["ConstructSignature"] = 152] = "ConstructSignature";
-        SyntaxKind[SyntaxKind["IndexSignature"] = 153] = "IndexSignature";
+        SyntaxKind[SyntaxKind["PropertySignature"] = 148] = "PropertySignature";
+        SyntaxKind[SyntaxKind["PropertyDeclaration"] = 149] = "PropertyDeclaration";
+        SyntaxKind[SyntaxKind["MethodSignature"] = 150] = "MethodSignature";
+        SyntaxKind[SyntaxKind["MethodDeclaration"] = 151] = "MethodDeclaration";
+        SyntaxKind[SyntaxKind["Constructor"] = 152] = "Constructor";
+        SyntaxKind[SyntaxKind["GetAccessor"] = 153] = "GetAccessor";
+        SyntaxKind[SyntaxKind["SetAccessor"] = 154] = "SetAccessor";
+        SyntaxKind[SyntaxKind["CallSignature"] = 155] = "CallSignature";
+        SyntaxKind[SyntaxKind["ConstructSignature"] = 156] = "ConstructSignature";
+        SyntaxKind[SyntaxKind["IndexSignature"] = 157] = "IndexSignature";
         // Type
-        SyntaxKind[SyntaxKind["TypePredicate"] = 154] = "TypePredicate";
-        SyntaxKind[SyntaxKind["TypeReference"] = 155] = "TypeReference";
-        SyntaxKind[SyntaxKind["FunctionType"] = 156] = "FunctionType";
-        SyntaxKind[SyntaxKind["ConstructorType"] = 157] = "ConstructorType";
-        SyntaxKind[SyntaxKind["TypeQuery"] = 158] = "TypeQuery";
-        SyntaxKind[SyntaxKind["TypeLiteral"] = 159] = "TypeLiteral";
-        SyntaxKind[SyntaxKind["ArrayType"] = 160] = "ArrayType";
-        SyntaxKind[SyntaxKind["TupleType"] = 161] = "TupleType";
-        SyntaxKind[SyntaxKind["UnionType"] = 162] = "UnionType";
-        SyntaxKind[SyntaxKind["IntersectionType"] = 163] = "IntersectionType";
-        SyntaxKind[SyntaxKind["ParenthesizedType"] = 164] = "ParenthesizedType";
-        SyntaxKind[SyntaxKind["ThisType"] = 165] = "ThisType";
-        SyntaxKind[SyntaxKind["LiteralType"] = 166] = "LiteralType";
+        SyntaxKind[SyntaxKind["TypePredicate"] = 158] = "TypePredicate";
+        SyntaxKind[SyntaxKind["TypeReference"] = 159] = "TypeReference";
+        SyntaxKind[SyntaxKind["FunctionType"] = 160] = "FunctionType";
+        SyntaxKind[SyntaxKind["ConstructorType"] = 161] = "ConstructorType";
+        SyntaxKind[SyntaxKind["TypeQuery"] = 162] = "TypeQuery";
+        SyntaxKind[SyntaxKind["TypeLiteral"] = 163] = "TypeLiteral";
+        SyntaxKind[SyntaxKind["ArrayType"] = 164] = "ArrayType";
+        SyntaxKind[SyntaxKind["TupleType"] = 165] = "TupleType";
+        SyntaxKind[SyntaxKind["UnionType"] = 166] = "UnionType";
+        SyntaxKind[SyntaxKind["IntersectionType"] = 167] = "IntersectionType";
+        SyntaxKind[SyntaxKind["ParenthesizedType"] = 168] = "ParenthesizedType";
+        SyntaxKind[SyntaxKind["ThisType"] = 169] = "ThisType";
+        SyntaxKind[SyntaxKind["TypeOperator"] = 170] = "TypeOperator";
+        SyntaxKind[SyntaxKind["IndexedAccessType"] = 171] = "IndexedAccessType";
+        SyntaxKind[SyntaxKind["MappedType"] = 172] = "MappedType";
+        SyntaxKind[SyntaxKind["LiteralType"] = 173] = "LiteralType";
         // Binding patterns
-        SyntaxKind[SyntaxKind["ObjectBindingPattern"] = 167] = "ObjectBindingPattern";
-        SyntaxKind[SyntaxKind["ArrayBindingPattern"] = 168] = "ArrayBindingPattern";
-        SyntaxKind[SyntaxKind["BindingElement"] = 169] = "BindingElement";
+        SyntaxKind[SyntaxKind["ObjectBindingPattern"] = 174] = "ObjectBindingPattern";
+        SyntaxKind[SyntaxKind["ArrayBindingPattern"] = 175] = "ArrayBindingPattern";
+        SyntaxKind[SyntaxKind["BindingElement"] = 176] = "BindingElement";
         // Expression
-        SyntaxKind[SyntaxKind["ArrayLiteralExpression"] = 170] = "ArrayLiteralExpression";
-        SyntaxKind[SyntaxKind["ObjectLiteralExpression"] = 171] = "ObjectLiteralExpression";
-        SyntaxKind[SyntaxKind["PropertyAccessExpression"] = 172] = "PropertyAccessExpression";
-        SyntaxKind[SyntaxKind["ElementAccessExpression"] = 173] = "ElementAccessExpression";
-        SyntaxKind[SyntaxKind["CallExpression"] = 174] = "CallExpression";
-        SyntaxKind[SyntaxKind["NewExpression"] = 175] = "NewExpression";
-        SyntaxKind[SyntaxKind["TaggedTemplateExpression"] = 176] = "TaggedTemplateExpression";
-        SyntaxKind[SyntaxKind["TypeAssertionExpression"] = 177] = "TypeAssertionExpression";
-        SyntaxKind[SyntaxKind["ParenthesizedExpression"] = 178] = "ParenthesizedExpression";
-        SyntaxKind[SyntaxKind["FunctionExpression"] = 179] = "FunctionExpression";
-        SyntaxKind[SyntaxKind["ArrowFunction"] = 180] = "ArrowFunction";
-        SyntaxKind[SyntaxKind["DeleteExpression"] = 181] = "DeleteExpression";
-        SyntaxKind[SyntaxKind["TypeOfExpression"] = 182] = "TypeOfExpression";
-        SyntaxKind[SyntaxKind["VoidExpression"] = 183] = "VoidExpression";
-        SyntaxKind[SyntaxKind["AwaitExpression"] = 184] = "AwaitExpression";
-        SyntaxKind[SyntaxKind["PrefixUnaryExpression"] = 185] = "PrefixUnaryExpression";
-        SyntaxKind[SyntaxKind["PostfixUnaryExpression"] = 186] = "PostfixUnaryExpression";
-        SyntaxKind[SyntaxKind["BinaryExpression"] = 187] = "BinaryExpression";
-        SyntaxKind[SyntaxKind["ConditionalExpression"] = 188] = "ConditionalExpression";
-        SyntaxKind[SyntaxKind["TemplateExpression"] = 189] = "TemplateExpression";
-        SyntaxKind[SyntaxKind["YieldExpression"] = 190] = "YieldExpression";
-        SyntaxKind[SyntaxKind["SpreadElementExpression"] = 191] = "SpreadElementExpression";
-        SyntaxKind[SyntaxKind["ClassExpression"] = 192] = "ClassExpression";
-        SyntaxKind[SyntaxKind["OmittedExpression"] = 193] = "OmittedExpression";
-        SyntaxKind[SyntaxKind["ExpressionWithTypeArguments"] = 194] = "ExpressionWithTypeArguments";
-        SyntaxKind[SyntaxKind["AsExpression"] = 195] = "AsExpression";
-        SyntaxKind[SyntaxKind["NonNullExpression"] = 196] = "NonNullExpression";
+        SyntaxKind[SyntaxKind["ArrayLiteralExpression"] = 177] = "ArrayLiteralExpression";
+        SyntaxKind[SyntaxKind["ObjectLiteralExpression"] = 178] = "ObjectLiteralExpression";
+        SyntaxKind[SyntaxKind["PropertyAccessExpression"] = 179] = "PropertyAccessExpression";
+        SyntaxKind[SyntaxKind["ElementAccessExpression"] = 180] = "ElementAccessExpression";
+        SyntaxKind[SyntaxKind["CallExpression"] = 181] = "CallExpression";
+        SyntaxKind[SyntaxKind["NewExpression"] = 182] = "NewExpression";
+        SyntaxKind[SyntaxKind["TaggedTemplateExpression"] = 183] = "TaggedTemplateExpression";
+        SyntaxKind[SyntaxKind["TypeAssertionExpression"] = 184] = "TypeAssertionExpression";
+        SyntaxKind[SyntaxKind["ParenthesizedExpression"] = 185] = "ParenthesizedExpression";
+        SyntaxKind[SyntaxKind["FunctionExpression"] = 186] = "FunctionExpression";
+        SyntaxKind[SyntaxKind["ArrowFunction"] = 187] = "ArrowFunction";
+        SyntaxKind[SyntaxKind["DeleteExpression"] = 188] = "DeleteExpression";
+        SyntaxKind[SyntaxKind["TypeOfExpression"] = 189] = "TypeOfExpression";
+        SyntaxKind[SyntaxKind["VoidExpression"] = 190] = "VoidExpression";
+        SyntaxKind[SyntaxKind["AwaitExpression"] = 191] = "AwaitExpression";
+        SyntaxKind[SyntaxKind["PrefixUnaryExpression"] = 192] = "PrefixUnaryExpression";
+        SyntaxKind[SyntaxKind["PostfixUnaryExpression"] = 193] = "PostfixUnaryExpression";
+        SyntaxKind[SyntaxKind["BinaryExpression"] = 194] = "BinaryExpression";
+        SyntaxKind[SyntaxKind["ConditionalExpression"] = 195] = "ConditionalExpression";
+        SyntaxKind[SyntaxKind["TemplateExpression"] = 196] = "TemplateExpression";
+        SyntaxKind[SyntaxKind["YieldExpression"] = 197] = "YieldExpression";
+        SyntaxKind[SyntaxKind["SpreadElement"] = 198] = "SpreadElement";
+        SyntaxKind[SyntaxKind["ClassExpression"] = 199] = "ClassExpression";
+        SyntaxKind[SyntaxKind["OmittedExpression"] = 200] = "OmittedExpression";
+        SyntaxKind[SyntaxKind["ExpressionWithTypeArguments"] = 201] = "ExpressionWithTypeArguments";
+        SyntaxKind[SyntaxKind["AsExpression"] = 202] = "AsExpression";
+        SyntaxKind[SyntaxKind["NonNullExpression"] = 203] = "NonNullExpression";
+        SyntaxKind[SyntaxKind["MetaProperty"] = 204] = "MetaProperty";
         // Misc
-        SyntaxKind[SyntaxKind["TemplateSpan"] = 197] = "TemplateSpan";
-        SyntaxKind[SyntaxKind["SemicolonClassElement"] = 198] = "SemicolonClassElement";
+        SyntaxKind[SyntaxKind["TemplateSpan"] = 205] = "TemplateSpan";
+        SyntaxKind[SyntaxKind["SemicolonClassElement"] = 206] = "SemicolonClassElement";
         // Element
-        SyntaxKind[SyntaxKind["Block"] = 199] = "Block";
-        SyntaxKind[SyntaxKind["VariableStatement"] = 200] = "VariableStatement";
-        SyntaxKind[SyntaxKind["EmptyStatement"] = 201] = "EmptyStatement";
-        SyntaxKind[SyntaxKind["ExpressionStatement"] = 202] = "ExpressionStatement";
-        SyntaxKind[SyntaxKind["IfStatement"] = 203] = "IfStatement";
-        SyntaxKind[SyntaxKind["DoStatement"] = 204] = "DoStatement";
-        SyntaxKind[SyntaxKind["WhileStatement"] = 205] = "WhileStatement";
-        SyntaxKind[SyntaxKind["ForStatement"] = 206] = "ForStatement";
-        SyntaxKind[SyntaxKind["ForInStatement"] = 207] = "ForInStatement";
-        SyntaxKind[SyntaxKind["ForOfStatement"] = 208] = "ForOfStatement";
-        SyntaxKind[SyntaxKind["ContinueStatement"] = 209] = "ContinueStatement";
-        SyntaxKind[SyntaxKind["BreakStatement"] = 210] = "BreakStatement";
-        SyntaxKind[SyntaxKind["ReturnStatement"] = 211] = "ReturnStatement";
-        SyntaxKind[SyntaxKind["WithStatement"] = 212] = "WithStatement";
-        SyntaxKind[SyntaxKind["SwitchStatement"] = 213] = "SwitchStatement";
-        SyntaxKind[SyntaxKind["LabeledStatement"] = 214] = "LabeledStatement";
-        SyntaxKind[SyntaxKind["ThrowStatement"] = 215] = "ThrowStatement";
-        SyntaxKind[SyntaxKind["TryStatement"] = 216] = "TryStatement";
-        SyntaxKind[SyntaxKind["DebuggerStatement"] = 217] = "DebuggerStatement";
-        SyntaxKind[SyntaxKind["VariableDeclaration"] = 218] = "VariableDeclaration";
-        SyntaxKind[SyntaxKind["VariableDeclarationList"] = 219] = "VariableDeclarationList";
-        SyntaxKind[SyntaxKind["FunctionDeclaration"] = 220] = "FunctionDeclaration";
-        SyntaxKind[SyntaxKind["ClassDeclaration"] = 221] = "ClassDeclaration";
-        SyntaxKind[SyntaxKind["InterfaceDeclaration"] = 222] = "InterfaceDeclaration";
-        SyntaxKind[SyntaxKind["TypeAliasDeclaration"] = 223] = "TypeAliasDeclaration";
-        SyntaxKind[SyntaxKind["EnumDeclaration"] = 224] = "EnumDeclaration";
-        SyntaxKind[SyntaxKind["ModuleDeclaration"] = 225] = "ModuleDeclaration";
-        SyntaxKind[SyntaxKind["ModuleBlock"] = 226] = "ModuleBlock";
-        SyntaxKind[SyntaxKind["CaseBlock"] = 227] = "CaseBlock";
-        SyntaxKind[SyntaxKind["NamespaceExportDeclaration"] = 228] = "NamespaceExportDeclaration";
-        SyntaxKind[SyntaxKind["ImportEqualsDeclaration"] = 229] = "ImportEqualsDeclaration";
-        SyntaxKind[SyntaxKind["ImportDeclaration"] = 230] = "ImportDeclaration";
-        SyntaxKind[SyntaxKind["ImportClause"] = 231] = "ImportClause";
-        SyntaxKind[SyntaxKind["NamespaceImport"] = 232] = "NamespaceImport";
-        SyntaxKind[SyntaxKind["NamedImports"] = 233] = "NamedImports";
-        SyntaxKind[SyntaxKind["ImportSpecifier"] = 234] = "ImportSpecifier";
-        SyntaxKind[SyntaxKind["ExportAssignment"] = 235] = "ExportAssignment";
-        SyntaxKind[SyntaxKind["ExportDeclaration"] = 236] = "ExportDeclaration";
-        SyntaxKind[SyntaxKind["NamedExports"] = 237] = "NamedExports";
-        SyntaxKind[SyntaxKind["ExportSpecifier"] = 238] = "ExportSpecifier";
-        SyntaxKind[SyntaxKind["MissingDeclaration"] = 239] = "MissingDeclaration";
+        SyntaxKind[SyntaxKind["Block"] = 207] = "Block";
+        SyntaxKind[SyntaxKind["VariableStatement"] = 208] = "VariableStatement";
+        SyntaxKind[SyntaxKind["EmptyStatement"] = 209] = "EmptyStatement";
+        SyntaxKind[SyntaxKind["ExpressionStatement"] = 210] = "ExpressionStatement";
+        SyntaxKind[SyntaxKind["IfStatement"] = 211] = "IfStatement";
+        SyntaxKind[SyntaxKind["DoStatement"] = 212] = "DoStatement";
+        SyntaxKind[SyntaxKind["WhileStatement"] = 213] = "WhileStatement";
+        SyntaxKind[SyntaxKind["ForStatement"] = 214] = "ForStatement";
+        SyntaxKind[SyntaxKind["ForInStatement"] = 215] = "ForInStatement";
+        SyntaxKind[SyntaxKind["ForOfStatement"] = 216] = "ForOfStatement";
+        SyntaxKind[SyntaxKind["ContinueStatement"] = 217] = "ContinueStatement";
+        SyntaxKind[SyntaxKind["BreakStatement"] = 218] = "BreakStatement";
+        SyntaxKind[SyntaxKind["ReturnStatement"] = 219] = "ReturnStatement";
+        SyntaxKind[SyntaxKind["WithStatement"] = 220] = "WithStatement";
+        SyntaxKind[SyntaxKind["SwitchStatement"] = 221] = "SwitchStatement";
+        SyntaxKind[SyntaxKind["LabeledStatement"] = 222] = "LabeledStatement";
+        SyntaxKind[SyntaxKind["ThrowStatement"] = 223] = "ThrowStatement";
+        SyntaxKind[SyntaxKind["TryStatement"] = 224] = "TryStatement";
+        SyntaxKind[SyntaxKind["DebuggerStatement"] = 225] = "DebuggerStatement";
+        SyntaxKind[SyntaxKind["VariableDeclaration"] = 226] = "VariableDeclaration";
+        SyntaxKind[SyntaxKind["VariableDeclarationList"] = 227] = "VariableDeclarationList";
+        SyntaxKind[SyntaxKind["FunctionDeclaration"] = 228] = "FunctionDeclaration";
+        SyntaxKind[SyntaxKind["ClassDeclaration"] = 229] = "ClassDeclaration";
+        SyntaxKind[SyntaxKind["InterfaceDeclaration"] = 230] = "InterfaceDeclaration";
+        SyntaxKind[SyntaxKind["TypeAliasDeclaration"] = 231] = "TypeAliasDeclaration";
+        SyntaxKind[SyntaxKind["EnumDeclaration"] = 232] = "EnumDeclaration";
+        SyntaxKind[SyntaxKind["ModuleDeclaration"] = 233] = "ModuleDeclaration";
+        SyntaxKind[SyntaxKind["ModuleBlock"] = 234] = "ModuleBlock";
+        SyntaxKind[SyntaxKind["CaseBlock"] = 235] = "CaseBlock";
+        SyntaxKind[SyntaxKind["NamespaceExportDeclaration"] = 236] = "NamespaceExportDeclaration";
+        SyntaxKind[SyntaxKind["ImportEqualsDeclaration"] = 237] = "ImportEqualsDeclaration";
+        SyntaxKind[SyntaxKind["ImportDeclaration"] = 238] = "ImportDeclaration";
+        SyntaxKind[SyntaxKind["ImportClause"] = 239] = "ImportClause";
+        SyntaxKind[SyntaxKind["NamespaceImport"] = 240] = "NamespaceImport";
+        SyntaxKind[SyntaxKind["NamedImports"] = 241] = "NamedImports";
+        SyntaxKind[SyntaxKind["ImportSpecifier"] = 242] = "ImportSpecifier";
+        SyntaxKind[SyntaxKind["ExportAssignment"] = 243] = "ExportAssignment";
+        SyntaxKind[SyntaxKind["ExportDeclaration"] = 244] = "ExportDeclaration";
+        SyntaxKind[SyntaxKind["NamedExports"] = 245] = "NamedExports";
+        SyntaxKind[SyntaxKind["ExportSpecifier"] = 246] = "ExportSpecifier";
+        SyntaxKind[SyntaxKind["MissingDeclaration"] = 247] = "MissingDeclaration";
         // Module references
-        SyntaxKind[SyntaxKind["ExternalModuleReference"] = 240] = "ExternalModuleReference";
+        SyntaxKind[SyntaxKind["ExternalModuleReference"] = 248] = "ExternalModuleReference";
         // JSX
-        SyntaxKind[SyntaxKind["JsxElement"] = 241] = "JsxElement";
-        SyntaxKind[SyntaxKind["JsxSelfClosingElement"] = 242] = "JsxSelfClosingElement";
-        SyntaxKind[SyntaxKind["JsxOpeningElement"] = 243] = "JsxOpeningElement";
-        SyntaxKind[SyntaxKind["JsxText"] = 244] = "JsxText";
-        SyntaxKind[SyntaxKind["JsxClosingElement"] = 245] = "JsxClosingElement";
-        SyntaxKind[SyntaxKind["JsxAttribute"] = 246] = "JsxAttribute";
-        SyntaxKind[SyntaxKind["JsxSpreadAttribute"] = 247] = "JsxSpreadAttribute";
-        SyntaxKind[SyntaxKind["JsxExpression"] = 248] = "JsxExpression";
+        SyntaxKind[SyntaxKind["JsxElement"] = 249] = "JsxElement";
+        SyntaxKind[SyntaxKind["JsxSelfClosingElement"] = 250] = "JsxSelfClosingElement";
+        SyntaxKind[SyntaxKind["JsxOpeningElement"] = 251] = "JsxOpeningElement";
+        SyntaxKind[SyntaxKind["JsxClosingElement"] = 252] = "JsxClosingElement";
+        SyntaxKind[SyntaxKind["JsxAttribute"] = 253] = "JsxAttribute";
+        SyntaxKind[SyntaxKind["JsxAttributes"] = 254] = "JsxAttributes";
+        SyntaxKind[SyntaxKind["JsxSpreadAttribute"] = 255] = "JsxSpreadAttribute";
+        SyntaxKind[SyntaxKind["JsxExpression"] = 256] = "JsxExpression";
         // Clauses
-        SyntaxKind[SyntaxKind["CaseClause"] = 249] = "CaseClause";
-        SyntaxKind[SyntaxKind["DefaultClause"] = 250] = "DefaultClause";
-        SyntaxKind[SyntaxKind["HeritageClause"] = 251] = "HeritageClause";
-        SyntaxKind[SyntaxKind["CatchClause"] = 252] = "CatchClause";
+        SyntaxKind[SyntaxKind["CaseClause"] = 257] = "CaseClause";
+        SyntaxKind[SyntaxKind["DefaultClause"] = 258] = "DefaultClause";
+        SyntaxKind[SyntaxKind["HeritageClause"] = 259] = "HeritageClause";
+        SyntaxKind[SyntaxKind["CatchClause"] = 260] = "CatchClause";
         // Property assignments
-        SyntaxKind[SyntaxKind["PropertyAssignment"] = 253] = "PropertyAssignment";
-        SyntaxKind[SyntaxKind["ShorthandPropertyAssignment"] = 254] = "ShorthandPropertyAssignment";
+        SyntaxKind[SyntaxKind["PropertyAssignment"] = 261] = "PropertyAssignment";
+        SyntaxKind[SyntaxKind["ShorthandPropertyAssignment"] = 262] = "ShorthandPropertyAssignment";
+        SyntaxKind[SyntaxKind["SpreadAssignment"] = 263] = "SpreadAssignment";
         // Enum
-        SyntaxKind[SyntaxKind["EnumMember"] = 255] = "EnumMember";
+        SyntaxKind[SyntaxKind["EnumMember"] = 264] = "EnumMember";
         // Top-level nodes
-        SyntaxKind[SyntaxKind["SourceFile"] = 256] = "SourceFile";
+        SyntaxKind[SyntaxKind["SourceFile"] = 265] = "SourceFile";
+        SyntaxKind[SyntaxKind["Bundle"] = 266] = "Bundle";
         // JSDoc nodes
-        SyntaxKind[SyntaxKind["JSDocTypeExpression"] = 257] = "JSDocTypeExpression";
+        SyntaxKind[SyntaxKind["JSDocTypeExpression"] = 267] = "JSDocTypeExpression";
         // The * type
-        SyntaxKind[SyntaxKind["JSDocAllType"] = 258] = "JSDocAllType";
+        SyntaxKind[SyntaxKind["JSDocAllType"] = 268] = "JSDocAllType";
         // The ? type
-        SyntaxKind[SyntaxKind["JSDocUnknownType"] = 259] = "JSDocUnknownType";
-        SyntaxKind[SyntaxKind["JSDocArrayType"] = 260] = "JSDocArrayType";
-        SyntaxKind[SyntaxKind["JSDocUnionType"] = 261] = "JSDocUnionType";
-        SyntaxKind[SyntaxKind["JSDocTupleType"] = 262] = "JSDocTupleType";
-        SyntaxKind[SyntaxKind["JSDocNullableType"] = 263] = "JSDocNullableType";
-        SyntaxKind[SyntaxKind["JSDocNonNullableType"] = 264] = "JSDocNonNullableType";
-        SyntaxKind[SyntaxKind["JSDocRecordType"] = 265] = "JSDocRecordType";
-        SyntaxKind[SyntaxKind["JSDocRecordMember"] = 266] = "JSDocRecordMember";
-        SyntaxKind[SyntaxKind["JSDocTypeReference"] = 267] = "JSDocTypeReference";
-        SyntaxKind[SyntaxKind["JSDocOptionalType"] = 268] = "JSDocOptionalType";
-        SyntaxKind[SyntaxKind["JSDocFunctionType"] = 269] = "JSDocFunctionType";
-        SyntaxKind[SyntaxKind["JSDocVariadicType"] = 270] = "JSDocVariadicType";
-        SyntaxKind[SyntaxKind["JSDocConstructorType"] = 271] = "JSDocConstructorType";
-        SyntaxKind[SyntaxKind["JSDocThisType"] = 272] = "JSDocThisType";
-        SyntaxKind[SyntaxKind["JSDocComment"] = 273] = "JSDocComment";
-        SyntaxKind[SyntaxKind["JSDocTag"] = 274] = "JSDocTag";
-        SyntaxKind[SyntaxKind["JSDocParameterTag"] = 275] = "JSDocParameterTag";
-        SyntaxKind[SyntaxKind["JSDocReturnTag"] = 276] = "JSDocReturnTag";
-        SyntaxKind[SyntaxKind["JSDocTypeTag"] = 277] = "JSDocTypeTag";
-        SyntaxKind[SyntaxKind["JSDocTemplateTag"] = 278] = "JSDocTemplateTag";
-        SyntaxKind[SyntaxKind["JSDocTypedefTag"] = 279] = "JSDocTypedefTag";
-        SyntaxKind[SyntaxKind["JSDocPropertyTag"] = 280] = "JSDocPropertyTag";
-        SyntaxKind[SyntaxKind["JSDocTypeLiteral"] = 281] = "JSDocTypeLiteral";
-        SyntaxKind[SyntaxKind["JSDocLiteralType"] = 282] = "JSDocLiteralType";
-        SyntaxKind[SyntaxKind["JSDocNullKeyword"] = 283] = "JSDocNullKeyword";
-        SyntaxKind[SyntaxKind["JSDocUndefinedKeyword"] = 284] = "JSDocUndefinedKeyword";
-        SyntaxKind[SyntaxKind["JSDocNeverKeyword"] = 285] = "JSDocNeverKeyword";
+        SyntaxKind[SyntaxKind["JSDocUnknownType"] = 269] = "JSDocUnknownType";
+        SyntaxKind[SyntaxKind["JSDocArrayType"] = 270] = "JSDocArrayType";
+        SyntaxKind[SyntaxKind["JSDocUnionType"] = 271] = "JSDocUnionType";
+        SyntaxKind[SyntaxKind["JSDocTupleType"] = 272] = "JSDocTupleType";
+        SyntaxKind[SyntaxKind["JSDocNullableType"] = 273] = "JSDocNullableType";
+        SyntaxKind[SyntaxKind["JSDocNonNullableType"] = 274] = "JSDocNonNullableType";
+        SyntaxKind[SyntaxKind["JSDocRecordType"] = 275] = "JSDocRecordType";
+        SyntaxKind[SyntaxKind["JSDocRecordMember"] = 276] = "JSDocRecordMember";
+        SyntaxKind[SyntaxKind["JSDocTypeReference"] = 277] = "JSDocTypeReference";
+        SyntaxKind[SyntaxKind["JSDocOptionalType"] = 278] = "JSDocOptionalType";
+        SyntaxKind[SyntaxKind["JSDocFunctionType"] = 279] = "JSDocFunctionType";
+        SyntaxKind[SyntaxKind["JSDocVariadicType"] = 280] = "JSDocVariadicType";
+        SyntaxKind[SyntaxKind["JSDocConstructorType"] = 281] = "JSDocConstructorType";
+        SyntaxKind[SyntaxKind["JSDocThisType"] = 282] = "JSDocThisType";
+        SyntaxKind[SyntaxKind["JSDocComment"] = 283] = "JSDocComment";
+        SyntaxKind[SyntaxKind["JSDocTag"] = 284] = "JSDocTag";
+        SyntaxKind[SyntaxKind["JSDocAugmentsTag"] = 285] = "JSDocAugmentsTag";
+        SyntaxKind[SyntaxKind["JSDocClassTag"] = 286] = "JSDocClassTag";
+        SyntaxKind[SyntaxKind["JSDocParameterTag"] = 287] = "JSDocParameterTag";
+        SyntaxKind[SyntaxKind["JSDocReturnTag"] = 288] = "JSDocReturnTag";
+        SyntaxKind[SyntaxKind["JSDocTypeTag"] = 289] = "JSDocTypeTag";
+        SyntaxKind[SyntaxKind["JSDocTemplateTag"] = 290] = "JSDocTemplateTag";
+        SyntaxKind[SyntaxKind["JSDocTypedefTag"] = 291] = "JSDocTypedefTag";
+        SyntaxKind[SyntaxKind["JSDocPropertyTag"] = 292] = "JSDocPropertyTag";
+        SyntaxKind[SyntaxKind["JSDocTypeLiteral"] = 293] = "JSDocTypeLiteral";
+        SyntaxKind[SyntaxKind["JSDocLiteralType"] = 294] = "JSDocLiteralType";
         // Synthesized list
-        SyntaxKind[SyntaxKind["SyntaxList"] = 286] = "SyntaxList";
+        SyntaxKind[SyntaxKind["SyntaxList"] = 295] = "SyntaxList";
         // Transformation nodes
-        SyntaxKind[SyntaxKind["NotEmittedStatement"] = 287] = "NotEmittedStatement";
-        SyntaxKind[SyntaxKind["PartiallyEmittedExpression"] = 288] = "PartiallyEmittedExpression";
+        SyntaxKind[SyntaxKind["NotEmittedStatement"] = 296] = "NotEmittedStatement";
+        SyntaxKind[SyntaxKind["PartiallyEmittedExpression"] = 297] = "PartiallyEmittedExpression";
+        SyntaxKind[SyntaxKind["CommaListExpression"] = 298] = "CommaListExpression";
+        SyntaxKind[SyntaxKind["MergeDeclarationMarker"] = 299] = "MergeDeclarationMarker";
+        SyntaxKind[SyntaxKind["EndOfDeclarationMarker"] = 300] = "EndOfDeclarationMarker";
         // Enum value count
-        SyntaxKind[SyntaxKind["Count"] = 289] = "Count";
+        SyntaxKind[SyntaxKind["Count"] = 301] = "Count";
         // Markers
-        SyntaxKind[SyntaxKind["FirstAssignment"] = 56] = "FirstAssignment";
-        SyntaxKind[SyntaxKind["LastAssignment"] = 68] = "LastAssignment";
-        SyntaxKind[SyntaxKind["FirstCompoundAssignment"] = 57] = "FirstCompoundAssignment";
-        SyntaxKind[SyntaxKind["LastCompoundAssignment"] = 68] = "LastCompoundAssignment";
-        SyntaxKind[SyntaxKind["FirstReservedWord"] = 70] = "FirstReservedWord";
-        SyntaxKind[SyntaxKind["LastReservedWord"] = 105] = "LastReservedWord";
-        SyntaxKind[SyntaxKind["FirstKeyword"] = 70] = "FirstKeyword";
-        SyntaxKind[SyntaxKind["LastKeyword"] = 138] = "LastKeyword";
-        SyntaxKind[SyntaxKind["FirstFutureReservedWord"] = 106] = "FirstFutureReservedWord";
-        SyntaxKind[SyntaxKind["LastFutureReservedWord"] = 114] = "LastFutureReservedWord";
-        SyntaxKind[SyntaxKind["FirstTypeNode"] = 154] = "FirstTypeNode";
-        SyntaxKind[SyntaxKind["LastTypeNode"] = 166] = "LastTypeNode";
-        SyntaxKind[SyntaxKind["FirstPunctuation"] = 15] = "FirstPunctuation";
-        SyntaxKind[SyntaxKind["LastPunctuation"] = 68] = "LastPunctuation";
+        SyntaxKind[SyntaxKind["FirstAssignment"] = 58] = "FirstAssignment";
+        SyntaxKind[SyntaxKind["LastAssignment"] = 70] = "LastAssignment";
+        SyntaxKind[SyntaxKind["FirstCompoundAssignment"] = 59] = "FirstCompoundAssignment";
+        SyntaxKind[SyntaxKind["LastCompoundAssignment"] = 70] = "LastCompoundAssignment";
+        SyntaxKind[SyntaxKind["FirstReservedWord"] = 72] = "FirstReservedWord";
+        SyntaxKind[SyntaxKind["LastReservedWord"] = 107] = "LastReservedWord";
+        SyntaxKind[SyntaxKind["FirstKeyword"] = 72] = "FirstKeyword";
+        SyntaxKind[SyntaxKind["LastKeyword"] = 142] = "LastKeyword";
+        SyntaxKind[SyntaxKind["FirstFutureReservedWord"] = 108] = "FirstFutureReservedWord";
+        SyntaxKind[SyntaxKind["LastFutureReservedWord"] = 116] = "LastFutureReservedWord";
+        SyntaxKind[SyntaxKind["FirstTypeNode"] = 158] = "FirstTypeNode";
+        SyntaxKind[SyntaxKind["LastTypeNode"] = 173] = "LastTypeNode";
+        SyntaxKind[SyntaxKind["FirstPunctuation"] = 17] = "FirstPunctuation";
+        SyntaxKind[SyntaxKind["LastPunctuation"] = 70] = "LastPunctuation";
         SyntaxKind[SyntaxKind["FirstToken"] = 0] = "FirstToken";
-        SyntaxKind[SyntaxKind["LastToken"] = 138] = "LastToken";
+        SyntaxKind[SyntaxKind["LastToken"] = 142] = "LastToken";
         SyntaxKind[SyntaxKind["FirstTriviaToken"] = 2] = "FirstTriviaToken";
         SyntaxKind[SyntaxKind["LastTriviaToken"] = 7] = "LastTriviaToken";
         SyntaxKind[SyntaxKind["FirstLiteralToken"] = 8] = "FirstLiteralToken";
-        SyntaxKind[SyntaxKind["LastLiteralToken"] = 11] = "LastLiteralToken";
-        SyntaxKind[SyntaxKind["FirstTemplateToken"] = 11] = "FirstTemplateToken";
-        SyntaxKind[SyntaxKind["LastTemplateToken"] = 14] = "LastTemplateToken";
-        SyntaxKind[SyntaxKind["FirstBinaryOperator"] = 25] = "FirstBinaryOperator";
-        SyntaxKind[SyntaxKind["LastBinaryOperator"] = 68] = "LastBinaryOperator";
-        SyntaxKind[SyntaxKind["FirstNode"] = 139] = "FirstNode";
-        SyntaxKind[SyntaxKind["FirstJSDocNode"] = 257] = "FirstJSDocNode";
-        SyntaxKind[SyntaxKind["LastJSDocNode"] = 282] = "LastJSDocNode";
-        SyntaxKind[SyntaxKind["FirstJSDocTagNode"] = 273] = "FirstJSDocTagNode";
-        SyntaxKind[SyntaxKind["LastJSDocTagNode"] = 285] = "LastJSDocTagNode";
-    })(ts.SyntaxKind || (ts.SyntaxKind = {}));
-    var SyntaxKind = ts.SyntaxKind;
+        SyntaxKind[SyntaxKind["LastLiteralToken"] = 13] = "LastLiteralToken";
+        SyntaxKind[SyntaxKind["FirstTemplateToken"] = 13] = "FirstTemplateToken";
+        SyntaxKind[SyntaxKind["LastTemplateToken"] = 16] = "LastTemplateToken";
+        SyntaxKind[SyntaxKind["FirstBinaryOperator"] = 27] = "FirstBinaryOperator";
+        SyntaxKind[SyntaxKind["LastBinaryOperator"] = 70] = "LastBinaryOperator";
+        SyntaxKind[SyntaxKind["FirstNode"] = 143] = "FirstNode";
+        SyntaxKind[SyntaxKind["FirstJSDocNode"] = 267] = "FirstJSDocNode";
+        SyntaxKind[SyntaxKind["LastJSDocNode"] = 294] = "LastJSDocNode";
+        SyntaxKind[SyntaxKind["FirstJSDocTagNode"] = 284] = "FirstJSDocTagNode";
+        SyntaxKind[SyntaxKind["LastJSDocTagNode"] = 294] = "LastJSDocTagNode";
+    })(SyntaxKind = ts.SyntaxKind || (ts.SyntaxKind = {}));
+    var NodeFlags;
     (function (NodeFlags) {
         NodeFlags[NodeFlags["None"] = 0] = "None";
         NodeFlags[NodeFlags["Let"] = 1] = "Let";
@@ -374,29 +400,34 @@ var ts;
         NodeFlags[NodeFlags["HasImplicitReturn"] = 128] = "HasImplicitReturn";
         NodeFlags[NodeFlags["HasExplicitReturn"] = 256] = "HasExplicitReturn";
         NodeFlags[NodeFlags["GlobalAugmentation"] = 512] = "GlobalAugmentation";
-        NodeFlags[NodeFlags["HasClassExtends"] = 1024] = "HasClassExtends";
-        NodeFlags[NodeFlags["HasDecorators"] = 2048] = "HasDecorators";
-        NodeFlags[NodeFlags["HasParamDecorators"] = 4096] = "HasParamDecorators";
-        NodeFlags[NodeFlags["HasAsyncFunctions"] = 8192] = "HasAsyncFunctions";
-        NodeFlags[NodeFlags["HasJsxSpreadAttributes"] = 16384] = "HasJsxSpreadAttributes";
-        NodeFlags[NodeFlags["DisallowInContext"] = 32768] = "DisallowInContext";
-        NodeFlags[NodeFlags["YieldContext"] = 65536] = "YieldContext";
-        NodeFlags[NodeFlags["DecoratorContext"] = 131072] = "DecoratorContext";
-        NodeFlags[NodeFlags["AwaitContext"] = 262144] = "AwaitContext";
-        NodeFlags[NodeFlags["ThisNodeHasError"] = 524288] = "ThisNodeHasError";
-        NodeFlags[NodeFlags["JavaScriptFile"] = 1048576] = "JavaScriptFile";
-        NodeFlags[NodeFlags["ThisNodeOrAnySubNodesHasError"] = 2097152] = "ThisNodeOrAnySubNodesHasError";
-        NodeFlags[NodeFlags["HasAggregatedChildData"] = 4194304] = "HasAggregatedChildData";
+        NodeFlags[NodeFlags["HasAsyncFunctions"] = 1024] = "HasAsyncFunctions";
+        NodeFlags[NodeFlags["DisallowInContext"] = 2048] = "DisallowInContext";
+        NodeFlags[NodeFlags["YieldContext"] = 4096] = "YieldContext";
+        NodeFlags[NodeFlags["DecoratorContext"] = 8192] = "DecoratorContext";
+        NodeFlags[NodeFlags["AwaitContext"] = 16384] = "AwaitContext";
+        NodeFlags[NodeFlags["ThisNodeHasError"] = 32768] = "ThisNodeHasError";
+        NodeFlags[NodeFlags["JavaScriptFile"] = 65536] = "JavaScriptFile";
+        NodeFlags[NodeFlags["ThisNodeOrAnySubNodesHasError"] = 131072] = "ThisNodeOrAnySubNodesHasError";
+        NodeFlags[NodeFlags["HasAggregatedChildData"] = 262144] = "HasAggregatedChildData";
+        // This flag will be set when the parser encounters a dynamic import expression so that module resolution
+        // will not have to walk the tree if the flag is not set. However, this flag is just a approximation because
+        // once it is set, the flag never gets cleared (hence why it's named "PossiblyContainsDynamicImport").
+        // During editing, if dynamic import is removed, incremental parsing will *NOT* update this flag. This means that the tree will always be traversed
+        // during module resolution. However, the removal operation should not occur often and in the case of the
+        // removal, it is likely that users will add the import anyway.
+        // The advantage of this approach is its simplicity. For the case of batch compilation,
+        // we guarantee that users won't have to pay the price of walking the tree if a dynamic import isn't used.
+        /* @internal */
+        NodeFlags[NodeFlags["PossiblyContainsDynamicImport"] = 524288] = "PossiblyContainsDynamicImport";
         NodeFlags[NodeFlags["BlockScoped"] = 3] = "BlockScoped";
         NodeFlags[NodeFlags["ReachabilityCheckFlags"] = 384] = "ReachabilityCheckFlags";
-        NodeFlags[NodeFlags["EmitHelperFlags"] = 31744] = "EmitHelperFlags";
-        NodeFlags[NodeFlags["ReachabilityAndEmitFlags"] = 32128] = "ReachabilityAndEmitFlags";
+        NodeFlags[NodeFlags["ReachabilityAndEmitFlags"] = 1408] = "ReachabilityAndEmitFlags";
         // Parsing context flags
-        NodeFlags[NodeFlags["ContextFlags"] = 1540096] = "ContextFlags";
+        NodeFlags[NodeFlags["ContextFlags"] = 96256] = "ContextFlags";
         // Exclude these flags when parsing a Type
-        NodeFlags[NodeFlags["TypeExcludesFlags"] = 327680] = "TypeExcludesFlags";
-    })(ts.NodeFlags || (ts.NodeFlags = {}));
-    var NodeFlags = ts.NodeFlags;
+        NodeFlags[NodeFlags["TypeExcludesFlags"] = 20480] = "TypeExcludesFlags";
+    })(NodeFlags = ts.NodeFlags || (ts.NodeFlags = {}));
+    var ModifierFlags;
     (function (ModifierFlags) {
         ModifierFlags[ModifierFlags["None"] = 0] = "None";
         ModifierFlags[ModifierFlags["Export"] = 1] = "Export";
@@ -415,8 +446,10 @@ var ts;
         // Accessibility modifiers and 'readonly' can be attached to a parameter in a constructor to make it a property.
         ModifierFlags[ModifierFlags["ParameterPropertyModifier"] = 92] = "ParameterPropertyModifier";
         ModifierFlags[ModifierFlags["NonPublicAccessibilityModifier"] = 24] = "NonPublicAccessibilityModifier";
-    })(ts.ModifierFlags || (ts.ModifierFlags = {}));
-    var ModifierFlags = ts.ModifierFlags;
+        ModifierFlags[ModifierFlags["TypeScriptModifier"] = 2270] = "TypeScriptModifier";
+        ModifierFlags[ModifierFlags["ExportDefault"] = 513] = "ExportDefault";
+    })(ModifierFlags = ts.ModifierFlags || (ts.ModifierFlags = {}));
+    var JsxFlags;
     (function (JsxFlags) {
         JsxFlags[JsxFlags["None"] = 0] = "None";
         /** An element from a named property of the JSX.IntrinsicElements interface */
@@ -424,24 +457,35 @@ var ts;
         /** An element inferred from the string index signature of the JSX.IntrinsicElements interface */
         JsxFlags[JsxFlags["IntrinsicIndexedElement"] = 2] = "IntrinsicIndexedElement";
         JsxFlags[JsxFlags["IntrinsicElement"] = 3] = "IntrinsicElement";
-    })(ts.JsxFlags || (ts.JsxFlags = {}));
-    var JsxFlags = ts.JsxFlags;
+    })(JsxFlags = ts.JsxFlags || (ts.JsxFlags = {}));
     /* @internal */
+    var RelationComparisonResult;
     (function (RelationComparisonResult) {
         RelationComparisonResult[RelationComparisonResult["Succeeded"] = 1] = "Succeeded";
         RelationComparisonResult[RelationComparisonResult["Failed"] = 2] = "Failed";
         RelationComparisonResult[RelationComparisonResult["FailedAndReported"] = 3] = "FailedAndReported";
-    })(ts.RelationComparisonResult || (ts.RelationComparisonResult = {}));
-    var RelationComparisonResult = ts.RelationComparisonResult;
+    })(RelationComparisonResult = ts.RelationComparisonResult || (ts.RelationComparisonResult = {}));
     /*@internal*/
+    var GeneratedIdentifierKind;
     (function (GeneratedIdentifierKind) {
         GeneratedIdentifierKind[GeneratedIdentifierKind["None"] = 0] = "None";
         GeneratedIdentifierKind[GeneratedIdentifierKind["Auto"] = 1] = "Auto";
         GeneratedIdentifierKind[GeneratedIdentifierKind["Loop"] = 2] = "Loop";
         GeneratedIdentifierKind[GeneratedIdentifierKind["Unique"] = 3] = "Unique";
         GeneratedIdentifierKind[GeneratedIdentifierKind["Node"] = 4] = "Node";
-    })(ts.GeneratedIdentifierKind || (ts.GeneratedIdentifierKind = {}));
-    var GeneratedIdentifierKind = ts.GeneratedIdentifierKind;
+    })(GeneratedIdentifierKind = ts.GeneratedIdentifierKind || (ts.GeneratedIdentifierKind = {}));
+    /* @internal */
+    var NumericLiteralFlags;
+    (function (NumericLiteralFlags) {
+        NumericLiteralFlags[NumericLiteralFlags["None"] = 0] = "None";
+        NumericLiteralFlags[NumericLiteralFlags["Scientific"] = 2] = "Scientific";
+        NumericLiteralFlags[NumericLiteralFlags["Octal"] = 4] = "Octal";
+        NumericLiteralFlags[NumericLiteralFlags["HexSpecifier"] = 8] = "HexSpecifier";
+        NumericLiteralFlags[NumericLiteralFlags["BinarySpecifier"] = 16] = "BinarySpecifier";
+        NumericLiteralFlags[NumericLiteralFlags["OctalSpecifier"] = 32] = "OctalSpecifier";
+        NumericLiteralFlags[NumericLiteralFlags["BinaryOrOctalSpecifier"] = 48] = "BinaryOrOctalSpecifier";
+    })(NumericLiteralFlags = ts.NumericLiteralFlags || (ts.NumericLiteralFlags = {}));
+    var FlowFlags;
     (function (FlowFlags) {
         FlowFlags[FlowFlags["Unreachable"] = 1] = "Unreachable";
         FlowFlags[FlowFlags["Start"] = 2] = "Start";
@@ -451,19 +495,29 @@ var ts;
         FlowFlags[FlowFlags["TrueCondition"] = 32] = "TrueCondition";
         FlowFlags[FlowFlags["FalseCondition"] = 64] = "FalseCondition";
         FlowFlags[FlowFlags["SwitchClause"] = 128] = "SwitchClause";
-        FlowFlags[FlowFlags["Referenced"] = 256] = "Referenced";
-        FlowFlags[FlowFlags["Shared"] = 512] = "Shared";
+        FlowFlags[FlowFlags["ArrayMutation"] = 256] = "ArrayMutation";
+        FlowFlags[FlowFlags["Referenced"] = 512] = "Referenced";
+        FlowFlags[FlowFlags["Shared"] = 1024] = "Shared";
+        FlowFlags[FlowFlags["PreFinally"] = 2048] = "PreFinally";
+        FlowFlags[FlowFlags["AfterFinally"] = 4096] = "AfterFinally";
         FlowFlags[FlowFlags["Label"] = 12] = "Label";
         FlowFlags[FlowFlags["Condition"] = 96] = "Condition";
-    })(ts.FlowFlags || (ts.FlowFlags = {}));
-    var FlowFlags = ts.FlowFlags;
+    })(FlowFlags = ts.FlowFlags || (ts.FlowFlags = {}));
     var OperationCanceledException = (function () {
         function OperationCanceledException() {
         }
         return OperationCanceledException;
     }());
     ts.OperationCanceledException = OperationCanceledException;
+    /* @internal */
+    var StructureIsReused;
+    (function (StructureIsReused) {
+        StructureIsReused[StructureIsReused["Not"] = 0] = "Not";
+        StructureIsReused[StructureIsReused["SafeModules"] = 1] = "SafeModules";
+        StructureIsReused[StructureIsReused["Completely"] = 2] = "Completely";
+    })(StructureIsReused = ts.StructureIsReused || (ts.StructureIsReused = {}));
     /** Return code used by getEmitOutput function to indicate status of the function */
+    var ExitStatus;
     (function (ExitStatus) {
         // Compiler ran successfully.  Either this was a simple do-nothing compilation (for example,
         // when -version or -help was provided, or this was a normal compilation, no diagnostics
@@ -473,23 +527,47 @@ var ts;
         ExitStatus[ExitStatus["DiagnosticsPresent_OutputsSkipped"] = 1] = "DiagnosticsPresent_OutputsSkipped";
         // Diagnostics were produced and outputs were generated in spite of them.
         ExitStatus[ExitStatus["DiagnosticsPresent_OutputsGenerated"] = 2] = "DiagnosticsPresent_OutputsGenerated";
-    })(ts.ExitStatus || (ts.ExitStatus = {}));
-    var ExitStatus = ts.ExitStatus;
+    })(ExitStatus = ts.ExitStatus || (ts.ExitStatus = {}));
+    var NodeBuilderFlags;
+    (function (NodeBuilderFlags) {
+        NodeBuilderFlags[NodeBuilderFlags["None"] = 0] = "None";
+        // Options
+        NodeBuilderFlags[NodeBuilderFlags["NoTruncation"] = 1] = "NoTruncation";
+        NodeBuilderFlags[NodeBuilderFlags["WriteArrayAsGenericType"] = 2] = "WriteArrayAsGenericType";
+        NodeBuilderFlags[NodeBuilderFlags["WriteTypeArgumentsOfSignature"] = 32] = "WriteTypeArgumentsOfSignature";
+        NodeBuilderFlags[NodeBuilderFlags["UseFullyQualifiedType"] = 64] = "UseFullyQualifiedType";
+        NodeBuilderFlags[NodeBuilderFlags["SuppressAnyReturnType"] = 256] = "SuppressAnyReturnType";
+        NodeBuilderFlags[NodeBuilderFlags["WriteTypeParametersInQualifiedName"] = 512] = "WriteTypeParametersInQualifiedName";
+        // Error handling
+        NodeBuilderFlags[NodeBuilderFlags["AllowThisInObjectLiteral"] = 1024] = "AllowThisInObjectLiteral";
+        NodeBuilderFlags[NodeBuilderFlags["AllowQualifedNameInPlaceOfIdentifier"] = 2048] = "AllowQualifedNameInPlaceOfIdentifier";
+        NodeBuilderFlags[NodeBuilderFlags["AllowAnonymousIdentifier"] = 8192] = "AllowAnonymousIdentifier";
+        NodeBuilderFlags[NodeBuilderFlags["AllowEmptyUnionOrIntersection"] = 16384] = "AllowEmptyUnionOrIntersection";
+        NodeBuilderFlags[NodeBuilderFlags["AllowEmptyTuple"] = 32768] = "AllowEmptyTuple";
+        NodeBuilderFlags[NodeBuilderFlags["IgnoreErrors"] = 60416] = "IgnoreErrors";
+        // State
+        NodeBuilderFlags[NodeBuilderFlags["InObjectTypeLiteral"] = 1048576] = "InObjectTypeLiteral";
+        NodeBuilderFlags[NodeBuilderFlags["InTypeAlias"] = 8388608] = "InTypeAlias";
+    })(NodeBuilderFlags = ts.NodeBuilderFlags || (ts.NodeBuilderFlags = {}));
+    var TypeFormatFlags;
     (function (TypeFormatFlags) {
         TypeFormatFlags[TypeFormatFlags["None"] = 0] = "None";
         TypeFormatFlags[TypeFormatFlags["WriteArrayAsGenericType"] = 1] = "WriteArrayAsGenericType";
-        TypeFormatFlags[TypeFormatFlags["UseTypeOfFunction"] = 2] = "UseTypeOfFunction";
-        TypeFormatFlags[TypeFormatFlags["NoTruncation"] = 4] = "NoTruncation";
-        TypeFormatFlags[TypeFormatFlags["WriteArrowStyleSignature"] = 8] = "WriteArrowStyleSignature";
-        TypeFormatFlags[TypeFormatFlags["WriteOwnNameForAnyLike"] = 16] = "WriteOwnNameForAnyLike";
-        TypeFormatFlags[TypeFormatFlags["WriteTypeArgumentsOfSignature"] = 32] = "WriteTypeArgumentsOfSignature";
-        TypeFormatFlags[TypeFormatFlags["InElementType"] = 64] = "InElementType";
-        TypeFormatFlags[TypeFormatFlags["UseFullyQualifiedType"] = 128] = "UseFullyQualifiedType";
-        TypeFormatFlags[TypeFormatFlags["InFirstTypeArgument"] = 256] = "InFirstTypeArgument";
-        TypeFormatFlags[TypeFormatFlags["InTypeAlias"] = 512] = "InTypeAlias";
-        TypeFormatFlags[TypeFormatFlags["UseTypeAliasValue"] = 1024] = "UseTypeAliasValue";
-    })(ts.TypeFormatFlags || (ts.TypeFormatFlags = {}));
-    var TypeFormatFlags = ts.TypeFormatFlags;
+        TypeFormatFlags[TypeFormatFlags["UseTypeOfFunction"] = 4] = "UseTypeOfFunction";
+        TypeFormatFlags[TypeFormatFlags["NoTruncation"] = 8] = "NoTruncation";
+        TypeFormatFlags[TypeFormatFlags["WriteArrowStyleSignature"] = 16] = "WriteArrowStyleSignature";
+        TypeFormatFlags[TypeFormatFlags["WriteOwnNameForAnyLike"] = 32] = "WriteOwnNameForAnyLike";
+        TypeFormatFlags[TypeFormatFlags["WriteTypeArgumentsOfSignature"] = 64] = "WriteTypeArgumentsOfSignature";
+        TypeFormatFlags[TypeFormatFlags["InElementType"] = 128] = "InElementType";
+        TypeFormatFlags[TypeFormatFlags["UseFullyQualifiedType"] = 256] = "UseFullyQualifiedType";
+        TypeFormatFlags[TypeFormatFlags["InFirstTypeArgument"] = 512] = "InFirstTypeArgument";
+        TypeFormatFlags[TypeFormatFlags["InTypeAlias"] = 1024] = "InTypeAlias";
+        TypeFormatFlags[TypeFormatFlags["UseTypeAliasValue"] = 2048] = "UseTypeAliasValue";
+        TypeFormatFlags[TypeFormatFlags["SuppressAnyReturnType"] = 4096] = "SuppressAnyReturnType";
+        TypeFormatFlags[TypeFormatFlags["AddUndefined"] = 8192] = "AddUndefined";
+        TypeFormatFlags[TypeFormatFlags["WriteClassExpressionAsTypeLiteral"] = 16384] = "WriteClassExpressionAsTypeLiteral";
+    })(TypeFormatFlags = ts.TypeFormatFlags || (ts.TypeFormatFlags = {}));
+    var SymbolFormatFlags;
     (function (SymbolFormatFlags) {
         SymbolFormatFlags[SymbolFormatFlags["None"] = 0] = "None";
         // Write symbols's type argument if it is instantiated symbol
@@ -501,23 +579,28 @@ var ts;
         // eg.  module m { export class c { } } import x = m.c;
         // When this flag is specified m.c will be used to refer to the class instead of alias symbol x
         SymbolFormatFlags[SymbolFormatFlags["UseOnlyExternalAliasing"] = 2] = "UseOnlyExternalAliasing";
-    })(ts.SymbolFormatFlags || (ts.SymbolFormatFlags = {}));
-    var SymbolFormatFlags = ts.SymbolFormatFlags;
+    })(SymbolFormatFlags = ts.SymbolFormatFlags || (ts.SymbolFormatFlags = {}));
     /* @internal */
+    var SymbolAccessibility;
     (function (SymbolAccessibility) {
         SymbolAccessibility[SymbolAccessibility["Accessible"] = 0] = "Accessible";
         SymbolAccessibility[SymbolAccessibility["NotAccessible"] = 1] = "NotAccessible";
         SymbolAccessibility[SymbolAccessibility["CannotBeNamed"] = 2] = "CannotBeNamed";
-    })(ts.SymbolAccessibility || (ts.SymbolAccessibility = {}));
-    var SymbolAccessibility = ts.SymbolAccessibility;
+    })(SymbolAccessibility = ts.SymbolAccessibility || (ts.SymbolAccessibility = {}));
+    /* @internal */
+    var SyntheticSymbolKind;
+    (function (SyntheticSymbolKind) {
+        SyntheticSymbolKind[SyntheticSymbolKind["UnionOrIntersection"] = 0] = "UnionOrIntersection";
+        SyntheticSymbolKind[SyntheticSymbolKind["Spread"] = 1] = "Spread";
+    })(SyntheticSymbolKind = ts.SyntheticSymbolKind || (ts.SyntheticSymbolKind = {}));
+    var TypePredicateKind;
     (function (TypePredicateKind) {
         TypePredicateKind[TypePredicateKind["This"] = 0] = "This";
         TypePredicateKind[TypePredicateKind["Identifier"] = 1] = "Identifier";
-    })(ts.TypePredicateKind || (ts.TypePredicateKind = {}));
-    var TypePredicateKind = ts.TypePredicateKind;
-    /** Indicates how to serialize the name for a TypeReferenceNode when emitting decorator
-      * metadata */
+    })(TypePredicateKind = ts.TypePredicateKind || (ts.TypePredicateKind = {}));
+    /** Indicates how to serialize the name for a TypeReferenceNode when emitting decorator metadata */
     /* @internal */
+    var TypeReferenceSerializationKind;
     (function (TypeReferenceSerializationKind) {
         TypeReferenceSerializationKind[TypeReferenceSerializationKind["Unknown"] = 0] = "Unknown";
         // should be emitted using a safe fallback.
@@ -535,8 +618,8 @@ var ts;
         TypeReferenceSerializationKind[TypeReferenceSerializationKind["TypeWithCallSignature"] = 9] = "TypeWithCallSignature";
         // with call signatures.
         TypeReferenceSerializationKind[TypeReferenceSerializationKind["ObjectType"] = 10] = "ObjectType";
-    })(ts.TypeReferenceSerializationKind || (ts.TypeReferenceSerializationKind = {}));
-    var TypeReferenceSerializationKind = ts.TypeReferenceSerializationKind;
+    })(TypeReferenceSerializationKind = ts.TypeReferenceSerializationKind || (ts.TypeReferenceSerializationKind = {}));
+    var SymbolFlags;
     (function (SymbolFlags) {
         SymbolFlags[SymbolFlags["None"] = 0] = "None";
         SymbolFlags[SymbolFlags["FunctionScopedVariable"] = 1] = "FunctionScopedVariable";
@@ -563,13 +646,10 @@ var ts;
         SymbolFlags[SymbolFlags["ExportType"] = 2097152] = "ExportType";
         SymbolFlags[SymbolFlags["ExportNamespace"] = 4194304] = "ExportNamespace";
         SymbolFlags[SymbolFlags["Alias"] = 8388608] = "Alias";
-        SymbolFlags[SymbolFlags["Instantiated"] = 16777216] = "Instantiated";
-        SymbolFlags[SymbolFlags["Merged"] = 33554432] = "Merged";
-        SymbolFlags[SymbolFlags["Transient"] = 67108864] = "Transient";
-        SymbolFlags[SymbolFlags["Prototype"] = 134217728] = "Prototype";
-        SymbolFlags[SymbolFlags["SyntheticProperty"] = 268435456] = "SyntheticProperty";
-        SymbolFlags[SymbolFlags["Optional"] = 536870912] = "Optional";
-        SymbolFlags[SymbolFlags["ExportStar"] = 1073741824] = "ExportStar";
+        SymbolFlags[SymbolFlags["Prototype"] = 16777216] = "Prototype";
+        SymbolFlags[SymbolFlags["ExportStar"] = 33554432] = "ExportStar";
+        SymbolFlags[SymbolFlags["Optional"] = 67108864] = "Optional";
+        SymbolFlags[SymbolFlags["Transient"] = 134217728] = "Transient";
         SymbolFlags[SymbolFlags["Enum"] = 384] = "Enum";
         SymbolFlags[SymbolFlags["Variable"] = 3] = "Variable";
         SymbolFlags[SymbolFlags["Value"] = 107455] = "Value";
@@ -611,13 +691,35 @@ var ts;
         // The set of things we consider semantically classifiable.  Used to speed up the LS during
         // classification.
         SymbolFlags[SymbolFlags["Classifiable"] = 788448] = "Classifiable";
-    })(ts.SymbolFlags || (ts.SymbolFlags = {}));
-    var SymbolFlags = ts.SymbolFlags;
+    })(SymbolFlags = ts.SymbolFlags || (ts.SymbolFlags = {}));
+    /* @internal */
+    var EnumKind;
+    (function (EnumKind) {
+        EnumKind[EnumKind["Numeric"] = 0] = "Numeric";
+        EnumKind[EnumKind["Literal"] = 1] = "Literal"; // Literal enum (each member has a TypeFlags.EnumLiteral type)
+    })(EnumKind = ts.EnumKind || (ts.EnumKind = {}));
     /* @internal */
+    var CheckFlags;
+    (function (CheckFlags) {
+        CheckFlags[CheckFlags["Instantiated"] = 1] = "Instantiated";
+        CheckFlags[CheckFlags["SyntheticProperty"] = 2] = "SyntheticProperty";
+        CheckFlags[CheckFlags["SyntheticMethod"] = 4] = "SyntheticMethod";
+        CheckFlags[CheckFlags["Readonly"] = 8] = "Readonly";
+        CheckFlags[CheckFlags["Partial"] = 16] = "Partial";
+        CheckFlags[CheckFlags["HasNonUniformType"] = 32] = "HasNonUniformType";
+        CheckFlags[CheckFlags["ContainsPublic"] = 64] = "ContainsPublic";
+        CheckFlags[CheckFlags["ContainsProtected"] = 128] = "ContainsProtected";
+        CheckFlags[CheckFlags["ContainsPrivate"] = 256] = "ContainsPrivate";
+        CheckFlags[CheckFlags["ContainsStatic"] = 512] = "ContainsStatic";
+        CheckFlags[CheckFlags["Synthetic"] = 6] = "Synthetic";
+    })(CheckFlags = ts.CheckFlags || (ts.CheckFlags = {}));
+    /* @internal */
+    var NodeCheckFlags;
     (function (NodeCheckFlags) {
         NodeCheckFlags[NodeCheckFlags["TypeChecked"] = 1] = "TypeChecked";
         NodeCheckFlags[NodeCheckFlags["LexicalThis"] = 2] = "LexicalThis";
         NodeCheckFlags[NodeCheckFlags["CaptureThis"] = 4] = "CaptureThis";
+        NodeCheckFlags[NodeCheckFlags["CaptureNewTarget"] = 8] = "CaptureNewTarget";
         NodeCheckFlags[NodeCheckFlags["SuperInstance"] = 256] = "SuperInstance";
         NodeCheckFlags[NodeCheckFlags["SuperStatic"] = 512] = "SuperStatic";
         NodeCheckFlags[NodeCheckFlags["ContextChecked"] = 1024] = "ContextChecked";
@@ -635,8 +737,8 @@ var ts;
         NodeCheckFlags[NodeCheckFlags["AssignmentsMarked"] = 4194304] = "AssignmentsMarked";
         NodeCheckFlags[NodeCheckFlags["ClassWithConstructorReference"] = 8388608] = "ClassWithConstructorReference";
         NodeCheckFlags[NodeCheckFlags["ConstructorReferenceInClass"] = 16777216] = "ConstructorReferenceInClass";
-    })(ts.NodeCheckFlags || (ts.NodeCheckFlags = {}));
-    var NodeCheckFlags = ts.NodeCheckFlags;
+    })(NodeCheckFlags = ts.NodeCheckFlags || (ts.NodeCheckFlags = {}));
+    var TypeFlags;
     (function (TypeFlags) {
         TypeFlags[TypeFlags["Any"] = 1] = "Any";
         TypeFlags[TypeFlags["String"] = 2] = "String";
@@ -653,66 +755,88 @@ var ts;
         TypeFlags[TypeFlags["Null"] = 4096] = "Null";
         TypeFlags[TypeFlags["Never"] = 8192] = "Never";
         TypeFlags[TypeFlags["TypeParameter"] = 16384] = "TypeParameter";
-        TypeFlags[TypeFlags["Class"] = 32768] = "Class";
-        TypeFlags[TypeFlags["Interface"] = 65536] = "Interface";
-        TypeFlags[TypeFlags["Reference"] = 131072] = "Reference";
-        TypeFlags[TypeFlags["Tuple"] = 262144] = "Tuple";
-        TypeFlags[TypeFlags["Union"] = 524288] = "Union";
-        TypeFlags[TypeFlags["Intersection"] = 1048576] = "Intersection";
-        TypeFlags[TypeFlags["Anonymous"] = 2097152] = "Anonymous";
-        TypeFlags[TypeFlags["Instantiated"] = 4194304] = "Instantiated";
+        TypeFlags[TypeFlags["Object"] = 32768] = "Object";
+        TypeFlags[TypeFlags["Union"] = 65536] = "Union";
+        TypeFlags[TypeFlags["Intersection"] = 131072] = "Intersection";
+        TypeFlags[TypeFlags["Index"] = 262144] = "Index";
+        TypeFlags[TypeFlags["IndexedAccess"] = 524288] = "IndexedAccess";
         /* @internal */
-        TypeFlags[TypeFlags["ObjectLiteral"] = 8388608] = "ObjectLiteral";
+        TypeFlags[TypeFlags["FreshLiteral"] = 1048576] = "FreshLiteral";
         /* @internal */
-        TypeFlags[TypeFlags["FreshLiteral"] = 16777216] = "FreshLiteral";
+        TypeFlags[TypeFlags["ContainsWideningType"] = 2097152] = "ContainsWideningType";
         /* @internal */
-        TypeFlags[TypeFlags["ContainsWideningType"] = 33554432] = "ContainsWideningType";
+        TypeFlags[TypeFlags["ContainsObjectLiteral"] = 4194304] = "ContainsObjectLiteral";
         /* @internal */
-        TypeFlags[TypeFlags["ContainsObjectLiteral"] = 67108864] = "ContainsObjectLiteral";
+        TypeFlags[TypeFlags["ContainsAnyFunctionType"] = 8388608] = "ContainsAnyFunctionType";
+        TypeFlags[TypeFlags["NonPrimitive"] = 16777216] = "NonPrimitive";
         /* @internal */
-        TypeFlags[TypeFlags["ContainsAnyFunctionType"] = 134217728] = "ContainsAnyFunctionType";
-        TypeFlags[TypeFlags["ThisType"] = 268435456] = "ThisType";
-        TypeFlags[TypeFlags["ObjectLiteralPatternWithComputedProperties"] = 536870912] = "ObjectLiteralPatternWithComputedProperties";
+        TypeFlags[TypeFlags["JsxAttributes"] = 33554432] = "JsxAttributes";
         /* @internal */
         TypeFlags[TypeFlags["Nullable"] = 6144] = "Nullable";
-        TypeFlags[TypeFlags["Literal"] = 480] = "Literal";
+        TypeFlags[TypeFlags["Literal"] = 224] = "Literal";
         TypeFlags[TypeFlags["StringOrNumberLiteral"] = 96] = "StringOrNumberLiteral";
         /* @internal */
         TypeFlags[TypeFlags["DefinitelyFalsy"] = 7392] = "DefinitelyFalsy";
         TypeFlags[TypeFlags["PossiblyFalsy"] = 7406] = "PossiblyFalsy";
         /* @internal */
-        TypeFlags[TypeFlags["Intrinsic"] = 16015] = "Intrinsic";
+        TypeFlags[TypeFlags["Intrinsic"] = 16793231] = "Intrinsic";
         /* @internal */
         TypeFlags[TypeFlags["Primitive"] = 8190] = "Primitive";
-        TypeFlags[TypeFlags["StringLike"] = 34] = "StringLike";
-        TypeFlags[TypeFlags["NumberLike"] = 340] = "NumberLike";
+        TypeFlags[TypeFlags["StringLike"] = 262178] = "StringLike";
+        TypeFlags[TypeFlags["NumberLike"] = 84] = "NumberLike";
         TypeFlags[TypeFlags["BooleanLike"] = 136] = "BooleanLike";
         TypeFlags[TypeFlags["EnumLike"] = 272] = "EnumLike";
-        TypeFlags[TypeFlags["ObjectType"] = 2588672] = "ObjectType";
-        TypeFlags[TypeFlags["UnionOrIntersection"] = 1572864] = "UnionOrIntersection";
-        TypeFlags[TypeFlags["StructuredType"] = 4161536] = "StructuredType";
-        TypeFlags[TypeFlags["StructuredOrTypeParameter"] = 4177920] = "StructuredOrTypeParameter";
+        TypeFlags[TypeFlags["UnionOrIntersection"] = 196608] = "UnionOrIntersection";
+        TypeFlags[TypeFlags["StructuredType"] = 229376] = "StructuredType";
+        TypeFlags[TypeFlags["StructuredOrTypeVariable"] = 1032192] = "StructuredOrTypeVariable";
+        TypeFlags[TypeFlags["TypeVariable"] = 540672] = "TypeVariable";
         // 'Narrowable' types are types where narrowing actually narrows.
         // This *should* be every type other than null, undefined, void, and never
-        TypeFlags[TypeFlags["Narrowable"] = 4178943] = "Narrowable";
-        TypeFlags[TypeFlags["NotUnionOrUnit"] = 2589191] = "NotUnionOrUnit";
+        TypeFlags[TypeFlags["Narrowable"] = 17810175] = "Narrowable";
+        TypeFlags[TypeFlags["NotUnionOrUnit"] = 16810497] = "NotUnionOrUnit";
         /* @internal */
-        TypeFlags[TypeFlags["RequiresWidening"] = 100663296] = "RequiresWidening";
+        TypeFlags[TypeFlags["RequiresWidening"] = 6291456] = "RequiresWidening";
         /* @internal */
-        TypeFlags[TypeFlags["PropagatingFlags"] = 234881024] = "PropagatingFlags";
-    })(ts.TypeFlags || (ts.TypeFlags = {}));
-    var TypeFlags = ts.TypeFlags;
+        TypeFlags[TypeFlags["PropagatingFlags"] = 14680064] = "PropagatingFlags";
+    })(TypeFlags = ts.TypeFlags || (ts.TypeFlags = {}));
+    var ObjectFlags;
+    (function (ObjectFlags) {
+        ObjectFlags[ObjectFlags["Class"] = 1] = "Class";
+        ObjectFlags[ObjectFlags["Interface"] = 2] = "Interface";
+        ObjectFlags[ObjectFlags["Reference"] = 4] = "Reference";
+        ObjectFlags[ObjectFlags["Tuple"] = 8] = "Tuple";
+        ObjectFlags[ObjectFlags["Anonymous"] = 16] = "Anonymous";
+        ObjectFlags[ObjectFlags["Mapped"] = 32] = "Mapped";
+        ObjectFlags[ObjectFlags["Instantiated"] = 64] = "Instantiated";
+        ObjectFlags[ObjectFlags["ObjectLiteral"] = 128] = "ObjectLiteral";
+        ObjectFlags[ObjectFlags["EvolvingArray"] = 256] = "EvolvingArray";
+        ObjectFlags[ObjectFlags["ObjectLiteralPatternWithComputedProperties"] = 512] = "ObjectLiteralPatternWithComputedProperties";
+        ObjectFlags[ObjectFlags["ClassOrInterface"] = 3] = "ClassOrInterface";
+    })(ObjectFlags = ts.ObjectFlags || (ts.ObjectFlags = {}));
+    var SignatureKind;
     (function (SignatureKind) {
         SignatureKind[SignatureKind["Call"] = 0] = "Call";
         SignatureKind[SignatureKind["Construct"] = 1] = "Construct";
-    })(ts.SignatureKind || (ts.SignatureKind = {}));
-    var SignatureKind = ts.SignatureKind;
+    })(SignatureKind = ts.SignatureKind || (ts.SignatureKind = {}));
+    var IndexKind;
     (function (IndexKind) {
         IndexKind[IndexKind["String"] = 0] = "String";
         IndexKind[IndexKind["Number"] = 1] = "Number";
-    })(ts.IndexKind || (ts.IndexKind = {}));
-    var IndexKind = ts.IndexKind;
+    })(IndexKind = ts.IndexKind || (ts.IndexKind = {}));
+    var InferencePriority;
+    (function (InferencePriority) {
+        InferencePriority[InferencePriority["NakedTypeVariable"] = 1] = "NakedTypeVariable";
+        InferencePriority[InferencePriority["MappedType"] = 2] = "MappedType";
+        InferencePriority[InferencePriority["ReturnType"] = 4] = "ReturnType";
+    })(InferencePriority = ts.InferencePriority || (ts.InferencePriority = {}));
+    var InferenceFlags;
+    (function (InferenceFlags) {
+        InferenceFlags[InferenceFlags["InferUnionTypes"] = 1] = "InferUnionTypes";
+        InferenceFlags[InferenceFlags["NoDefault"] = 2] = "NoDefault";
+        InferenceFlags[InferenceFlags["AnyDefault"] = 4] = "AnyDefault";
+    })(InferenceFlags = ts.InferenceFlags || (ts.InferenceFlags = {}));
     /* @internal */
+    var SpecialPropertyAssignmentKind;
     (function (SpecialPropertyAssignmentKind) {
         SpecialPropertyAssignmentKind[SpecialPropertyAssignmentKind["None"] = 0] = "None";
         /// exports.name = expr
@@ -723,73 +847,80 @@ var ts;
         SpecialPropertyAssignmentKind[SpecialPropertyAssignmentKind["PrototypeProperty"] = 3] = "PrototypeProperty";
         /// this.name = expr
         SpecialPropertyAssignmentKind[SpecialPropertyAssignmentKind["ThisProperty"] = 4] = "ThisProperty";
-    })(ts.SpecialPropertyAssignmentKind || (ts.SpecialPropertyAssignmentKind = {}));
-    var SpecialPropertyAssignmentKind = ts.SpecialPropertyAssignmentKind;
+        // F.name = expr
+        SpecialPropertyAssignmentKind[SpecialPropertyAssignmentKind["Property"] = 5] = "Property";
+    })(SpecialPropertyAssignmentKind = ts.SpecialPropertyAssignmentKind || (ts.SpecialPropertyAssignmentKind = {}));
+    var DiagnosticCategory;
     (function (DiagnosticCategory) {
         DiagnosticCategory[DiagnosticCategory["Warning"] = 0] = "Warning";
         DiagnosticCategory[DiagnosticCategory["Error"] = 1] = "Error";
         DiagnosticCategory[DiagnosticCategory["Message"] = 2] = "Message";
-    })(ts.DiagnosticCategory || (ts.DiagnosticCategory = {}));
-    var DiagnosticCategory = ts.DiagnosticCategory;
+    })(DiagnosticCategory = ts.DiagnosticCategory || (ts.DiagnosticCategory = {}));
+    var ModuleResolutionKind;
     (function (ModuleResolutionKind) {
         ModuleResolutionKind[ModuleResolutionKind["Classic"] = 1] = "Classic";
         ModuleResolutionKind[ModuleResolutionKind["NodeJs"] = 2] = "NodeJs";
-    })(ts.ModuleResolutionKind || (ts.ModuleResolutionKind = {}));
-    var ModuleResolutionKind = ts.ModuleResolutionKind;
+    })(ModuleResolutionKind = ts.ModuleResolutionKind || (ts.ModuleResolutionKind = {}));
+    var ModuleKind;
     (function (ModuleKind) {
         ModuleKind[ModuleKind["None"] = 0] = "None";
         ModuleKind[ModuleKind["CommonJS"] = 1] = "CommonJS";
         ModuleKind[ModuleKind["AMD"] = 2] = "AMD";
         ModuleKind[ModuleKind["UMD"] = 3] = "UMD";
         ModuleKind[ModuleKind["System"] = 4] = "System";
-        ModuleKind[ModuleKind["ES6"] = 5] = "ES6";
         ModuleKind[ModuleKind["ES2015"] = 5] = "ES2015";
-    })(ts.ModuleKind || (ts.ModuleKind = {}));
-    var ModuleKind = ts.ModuleKind;
+        ModuleKind[ModuleKind["ESNext"] = 6] = "ESNext";
+    })(ModuleKind = ts.ModuleKind || (ts.ModuleKind = {}));
+    var JsxEmit;
     (function (JsxEmit) {
         JsxEmit[JsxEmit["None"] = 0] = "None";
         JsxEmit[JsxEmit["Preserve"] = 1] = "Preserve";
         JsxEmit[JsxEmit["React"] = 2] = "React";
-    })(ts.JsxEmit || (ts.JsxEmit = {}));
-    var JsxEmit = ts.JsxEmit;
+        JsxEmit[JsxEmit["ReactNative"] = 3] = "ReactNative";
+    })(JsxEmit = ts.JsxEmit || (ts.JsxEmit = {}));
+    var NewLineKind;
     (function (NewLineKind) {
         NewLineKind[NewLineKind["CarriageReturnLineFeed"] = 0] = "CarriageReturnLineFeed";
         NewLineKind[NewLineKind["LineFeed"] = 1] = "LineFeed";
-    })(ts.NewLineKind || (ts.NewLineKind = {}));
-    var NewLineKind = ts.NewLineKind;
+    })(NewLineKind = ts.NewLineKind || (ts.NewLineKind = {}));
+    var ScriptKind;
     (function (ScriptKind) {
         ScriptKind[ScriptKind["Unknown"] = 0] = "Unknown";
         ScriptKind[ScriptKind["JS"] = 1] = "JS";
         ScriptKind[ScriptKind["JSX"] = 2] = "JSX";
         ScriptKind[ScriptKind["TS"] = 3] = "TS";
         ScriptKind[ScriptKind["TSX"] = 4] = "TSX";
-    })(ts.ScriptKind || (ts.ScriptKind = {}));
-    var ScriptKind = ts.ScriptKind;
+        ScriptKind[ScriptKind["External"] = 5] = "External";
+        ScriptKind[ScriptKind["JSON"] = 6] = "JSON";
+    })(ScriptKind = ts.ScriptKind || (ts.ScriptKind = {}));
+    var ScriptTarget;
     (function (ScriptTarget) {
         ScriptTarget[ScriptTarget["ES3"] = 0] = "ES3";
         ScriptTarget[ScriptTarget["ES5"] = 1] = "ES5";
-        ScriptTarget[ScriptTarget["ES6"] = 2] = "ES6";
         ScriptTarget[ScriptTarget["ES2015"] = 2] = "ES2015";
-        ScriptTarget[ScriptTarget["Latest"] = 2] = "Latest";
-    })(ts.ScriptTarget || (ts.ScriptTarget = {}));
-    var ScriptTarget = ts.ScriptTarget;
+        ScriptTarget[ScriptTarget["ES2016"] = 3] = "ES2016";
+        ScriptTarget[ScriptTarget["ES2017"] = 4] = "ES2017";
+        ScriptTarget[ScriptTarget["ESNext"] = 5] = "ESNext";
+        ScriptTarget[ScriptTarget["Latest"] = 5] = "Latest";
+    })(ScriptTarget = ts.ScriptTarget || (ts.ScriptTarget = {}));
+    var LanguageVariant;
     (function (LanguageVariant) {
         LanguageVariant[LanguageVariant["Standard"] = 0] = "Standard";
         LanguageVariant[LanguageVariant["JSX"] = 1] = "JSX";
-    })(ts.LanguageVariant || (ts.LanguageVariant = {}));
-    var LanguageVariant = ts.LanguageVariant;
+    })(LanguageVariant = ts.LanguageVariant || (ts.LanguageVariant = {}));
     /* @internal */
+    var DiagnosticStyle;
     (function (DiagnosticStyle) {
         DiagnosticStyle[DiagnosticStyle["Simple"] = 0] = "Simple";
         DiagnosticStyle[DiagnosticStyle["Pretty"] = 1] = "Pretty";
-    })(ts.DiagnosticStyle || (ts.DiagnosticStyle = {}));
-    var DiagnosticStyle = ts.DiagnosticStyle;
+    })(DiagnosticStyle = ts.DiagnosticStyle || (ts.DiagnosticStyle = {}));
+    var WatchDirectoryFlags;
     (function (WatchDirectoryFlags) {
         WatchDirectoryFlags[WatchDirectoryFlags["None"] = 0] = "None";
         WatchDirectoryFlags[WatchDirectoryFlags["Recursive"] = 1] = "Recursive";
-    })(ts.WatchDirectoryFlags || (ts.WatchDirectoryFlags = {}));
-    var WatchDirectoryFlags = ts.WatchDirectoryFlags;
+    })(WatchDirectoryFlags = ts.WatchDirectoryFlags || (ts.WatchDirectoryFlags = {}));
     /* @internal */
+    var CharacterCodes;
     (function (CharacterCodes) {
         CharacterCodes[CharacterCodes["nullCharacter"] = 0] = "nullCharacter";
         CharacterCodes[CharacterCodes["maxAsciiCharacter"] = 127] = "maxAsciiCharacter";
@@ -916,107 +1047,162 @@ var ts;
         CharacterCodes[CharacterCodes["byteOrderMark"] = 65279] = "byteOrderMark";
         CharacterCodes[CharacterCodes["tab"] = 9] = "tab";
         CharacterCodes[CharacterCodes["verticalTab"] = 11] = "verticalTab";
-    })(ts.CharacterCodes || (ts.CharacterCodes = {}));
-    var CharacterCodes = ts.CharacterCodes;
+    })(CharacterCodes = ts.CharacterCodes || (ts.CharacterCodes = {}));
+    var Extension;
+    (function (Extension) {
+        Extension["Ts"] = ".ts";
+        Extension["Tsx"] = ".tsx";
+        Extension["Dts"] = ".d.ts";
+        Extension["Js"] = ".js";
+        Extension["Jsx"] = ".jsx";
+    })(Extension = ts.Extension || (ts.Extension = {}));
     /* @internal */
+    var TransformFlags;
     (function (TransformFlags) {
         TransformFlags[TransformFlags["None"] = 0] = "None";
         // Facts
         // - Flags used to indicate that a node or subtree contains syntax that requires transformation.
         TransformFlags[TransformFlags["TypeScript"] = 1] = "TypeScript";
         TransformFlags[TransformFlags["ContainsTypeScript"] = 2] = "ContainsTypeScript";
-        TransformFlags[TransformFlags["Jsx"] = 4] = "Jsx";
-        TransformFlags[TransformFlags["ContainsJsx"] = 8] = "ContainsJsx";
-        TransformFlags[TransformFlags["ES7"] = 16] = "ES7";
-        TransformFlags[TransformFlags["ContainsES7"] = 32] = "ContainsES7";
-        TransformFlags[TransformFlags["ES6"] = 64] = "ES6";
-        TransformFlags[TransformFlags["ContainsES6"] = 128] = "ContainsES6";
-        TransformFlags[TransformFlags["DestructuringAssignment"] = 256] = "DestructuringAssignment";
-        TransformFlags[TransformFlags["Generator"] = 512] = "Generator";
-        TransformFlags[TransformFlags["ContainsGenerator"] = 1024] = "ContainsGenerator";
+        TransformFlags[TransformFlags["ContainsJsx"] = 4] = "ContainsJsx";
+        TransformFlags[TransformFlags["ContainsESNext"] = 8] = "ContainsESNext";
+        TransformFlags[TransformFlags["ContainsES2017"] = 16] = "ContainsES2017";
+        TransformFlags[TransformFlags["ContainsES2016"] = 32] = "ContainsES2016";
+        TransformFlags[TransformFlags["ES2015"] = 64] = "ES2015";
+        TransformFlags[TransformFlags["ContainsES2015"] = 128] = "ContainsES2015";
+        TransformFlags[TransformFlags["Generator"] = 256] = "Generator";
+        TransformFlags[TransformFlags["ContainsGenerator"] = 512] = "ContainsGenerator";
+        TransformFlags[TransformFlags["DestructuringAssignment"] = 1024] = "DestructuringAssignment";
+        TransformFlags[TransformFlags["ContainsDestructuringAssignment"] = 2048] = "ContainsDestructuringAssignment";
         // Markers
         // - Flags used to indicate that a subtree contains a specific transformation.
-        TransformFlags[TransformFlags["ContainsDecorators"] = 2048] = "ContainsDecorators";
-        TransformFlags[TransformFlags["ContainsPropertyInitializer"] = 4096] = "ContainsPropertyInitializer";
-        TransformFlags[TransformFlags["ContainsLexicalThis"] = 8192] = "ContainsLexicalThis";
-        TransformFlags[TransformFlags["ContainsCapturedLexicalThis"] = 16384] = "ContainsCapturedLexicalThis";
-        TransformFlags[TransformFlags["ContainsLexicalThisInComputedPropertyName"] = 32768] = "ContainsLexicalThisInComputedPropertyName";
-        TransformFlags[TransformFlags["ContainsDefaultValueAssignments"] = 65536] = "ContainsDefaultValueAssignments";
-        TransformFlags[TransformFlags["ContainsParameterPropertyAssignments"] = 131072] = "ContainsParameterPropertyAssignments";
-        TransformFlags[TransformFlags["ContainsSpreadElementExpression"] = 262144] = "ContainsSpreadElementExpression";
-        TransformFlags[TransformFlags["ContainsComputedPropertyName"] = 524288] = "ContainsComputedPropertyName";
-        TransformFlags[TransformFlags["ContainsBlockScopedBinding"] = 1048576] = "ContainsBlockScopedBinding";
-        TransformFlags[TransformFlags["ContainsBindingPattern"] = 2097152] = "ContainsBindingPattern";
-        TransformFlags[TransformFlags["ContainsYield"] = 4194304] = "ContainsYield";
-        TransformFlags[TransformFlags["ContainsHoistedDeclarationOrCompletion"] = 8388608] = "ContainsHoistedDeclarationOrCompletion";
+        TransformFlags[TransformFlags["ContainsDecorators"] = 4096] = "ContainsDecorators";
+        TransformFlags[TransformFlags["ContainsPropertyInitializer"] = 8192] = "ContainsPropertyInitializer";
+        TransformFlags[TransformFlags["ContainsLexicalThis"] = 16384] = "ContainsLexicalThis";
+        TransformFlags[TransformFlags["ContainsCapturedLexicalThis"] = 32768] = "ContainsCapturedLexicalThis";
+        TransformFlags[TransformFlags["ContainsLexicalThisInComputedPropertyName"] = 65536] = "ContainsLexicalThisInComputedPropertyName";
+        TransformFlags[TransformFlags["ContainsDefaultValueAssignments"] = 131072] = "ContainsDefaultValueAssignments";
+        TransformFlags[TransformFlags["ContainsParameterPropertyAssignments"] = 262144] = "ContainsParameterPropertyAssignments";
+        TransformFlags[TransformFlags["ContainsSpread"] = 524288] = "ContainsSpread";
+        TransformFlags[TransformFlags["ContainsObjectSpread"] = 1048576] = "ContainsObjectSpread";
+        TransformFlags[TransformFlags["ContainsRest"] = 524288] = "ContainsRest";
+        TransformFlags[TransformFlags["ContainsObjectRest"] = 1048576] = "ContainsObjectRest";
+        TransformFlags[TransformFlags["ContainsComputedPropertyName"] = 2097152] = "ContainsComputedPropertyName";
+        TransformFlags[TransformFlags["ContainsBlockScopedBinding"] = 4194304] = "ContainsBlockScopedBinding";
+        TransformFlags[TransformFlags["ContainsBindingPattern"] = 8388608] = "ContainsBindingPattern";
+        TransformFlags[TransformFlags["ContainsYield"] = 16777216] = "ContainsYield";
+        TransformFlags[TransformFlags["ContainsHoistedDeclarationOrCompletion"] = 33554432] = "ContainsHoistedDeclarationOrCompletion";
+        TransformFlags[TransformFlags["ContainsDynamicImport"] = 67108864] = "ContainsDynamicImport";
+        // Please leave this as 1 << 29.
+        // It is the maximum bit we can set before we outgrow the size of a v8 small integer (SMI) on an x86 system.
+        // It is a good reminder of how much room we have left
         TransformFlags[TransformFlags["HasComputedFlags"] = 536870912] = "HasComputedFlags";
         // Assertions
         // - Bitmasks that are used to assert facts about the syntax of a node and its subtree.
         TransformFlags[TransformFlags["AssertTypeScript"] = 3] = "AssertTypeScript";
-        TransformFlags[TransformFlags["AssertJsx"] = 12] = "AssertJsx";
-        TransformFlags[TransformFlags["AssertES7"] = 48] = "AssertES7";
-        TransformFlags[TransformFlags["AssertES6"] = 192] = "AssertES6";
-        TransformFlags[TransformFlags["AssertGenerator"] = 1536] = "AssertGenerator";
+        TransformFlags[TransformFlags["AssertJsx"] = 4] = "AssertJsx";
+        TransformFlags[TransformFlags["AssertESNext"] = 8] = "AssertESNext";
+        TransformFlags[TransformFlags["AssertES2017"] = 16] = "AssertES2017";
+        TransformFlags[TransformFlags["AssertES2016"] = 32] = "AssertES2016";
+        TransformFlags[TransformFlags["AssertES2015"] = 192] = "AssertES2015";
+        TransformFlags[TransformFlags["AssertGenerator"] = 768] = "AssertGenerator";
+        TransformFlags[TransformFlags["AssertDestructuringAssignment"] = 3072] = "AssertDestructuringAssignment";
         // Scope Exclusions
         // - Bitmasks that exclude flags from propagating out of a specific context
         //   into the subtree flags of their container.
-        TransformFlags[TransformFlags["NodeExcludes"] = 536871765] = "NodeExcludes";
-        TransformFlags[TransformFlags["ArrowFunctionExcludes"] = 550710101] = "ArrowFunctionExcludes";
-        TransformFlags[TransformFlags["FunctionExcludes"] = 550726485] = "FunctionExcludes";
-        TransformFlags[TransformFlags["ConstructorExcludes"] = 550593365] = "ConstructorExcludes";
-        TransformFlags[TransformFlags["MethodOrAccessorExcludes"] = 550593365] = "MethodOrAccessorExcludes";
-        TransformFlags[TransformFlags["ClassExcludes"] = 537590613] = "ClassExcludes";
-        TransformFlags[TransformFlags["ModuleExcludes"] = 546335573] = "ModuleExcludes";
+        TransformFlags[TransformFlags["NodeExcludes"] = 536872257] = "NodeExcludes";
+        TransformFlags[TransformFlags["ArrowFunctionExcludes"] = 601249089] = "ArrowFunctionExcludes";
+        TransformFlags[TransformFlags["FunctionExcludes"] = 601281857] = "FunctionExcludes";
+        TransformFlags[TransformFlags["ConstructorExcludes"] = 601015617] = "ConstructorExcludes";
+        TransformFlags[TransformFlags["MethodOrAccessorExcludes"] = 601015617] = "MethodOrAccessorExcludes";
+        TransformFlags[TransformFlags["ClassExcludes"] = 539358529] = "ClassExcludes";
+        TransformFlags[TransformFlags["ModuleExcludes"] = 574674241] = "ModuleExcludes";
         TransformFlags[TransformFlags["TypeExcludes"] = -3] = "TypeExcludes";
-        TransformFlags[TransformFlags["ObjectLiteralExcludes"] = 537430869] = "ObjectLiteralExcludes";
-        TransformFlags[TransformFlags["ArrayLiteralOrCallOrNewExcludes"] = 537133909] = "ArrayLiteralOrCallOrNewExcludes";
-        TransformFlags[TransformFlags["VariableDeclarationListExcludes"] = 538968917] = "VariableDeclarationListExcludes";
-        TransformFlags[TransformFlags["ParameterExcludes"] = 538968917] = "ParameterExcludes";
+        TransformFlags[TransformFlags["ObjectLiteralExcludes"] = 540087617] = "ObjectLiteralExcludes";
+        TransformFlags[TransformFlags["ArrayLiteralOrCallOrNewExcludes"] = 537396545] = "ArrayLiteralOrCallOrNewExcludes";
+        TransformFlags[TransformFlags["VariableDeclarationListExcludes"] = 546309441] = "VariableDeclarationListExcludes";
+        TransformFlags[TransformFlags["ParameterExcludes"] = 536872257] = "ParameterExcludes";
+        TransformFlags[TransformFlags["CatchClauseExcludes"] = 537920833] = "CatchClauseExcludes";
+        TransformFlags[TransformFlags["BindingPatternExcludes"] = 537396545] = "BindingPatternExcludes";
         // Masks
         // - Additional bitmasks
-        TransformFlags[TransformFlags["TypeScriptClassSyntaxMask"] = 137216] = "TypeScriptClassSyntaxMask";
-        TransformFlags[TransformFlags["ES6FunctionSyntaxMask"] = 81920] = "ES6FunctionSyntaxMask";
-    })(ts.TransformFlags || (ts.TransformFlags = {}));
-    var TransformFlags = ts.TransformFlags;
-    /* @internal */
+        TransformFlags[TransformFlags["TypeScriptClassSyntaxMask"] = 274432] = "TypeScriptClassSyntaxMask";
+        TransformFlags[TransformFlags["ES2015FunctionSyntaxMask"] = 163840] = "ES2015FunctionSyntaxMask";
+    })(TransformFlags = ts.TransformFlags || (ts.TransformFlags = {}));
+    var EmitFlags;
     (function (EmitFlags) {
-        EmitFlags[EmitFlags["EmitEmitHelpers"] = 1] = "EmitEmitHelpers";
-        EmitFlags[EmitFlags["EmitExportStar"] = 2] = "EmitExportStar";
-        EmitFlags[EmitFlags["EmitSuperHelper"] = 4] = "EmitSuperHelper";
-        EmitFlags[EmitFlags["EmitAdvancedSuperHelper"] = 8] = "EmitAdvancedSuperHelper";
-        EmitFlags[EmitFlags["UMDDefine"] = 16] = "UMDDefine";
-        EmitFlags[EmitFlags["SingleLine"] = 32] = "SingleLine";
-        EmitFlags[EmitFlags["AdviseOnEmitNode"] = 64] = "AdviseOnEmitNode";
-        EmitFlags[EmitFlags["NoSubstitution"] = 128] = "NoSubstitution";
-        EmitFlags[EmitFlags["CapturesThis"] = 256] = "CapturesThis";
-        EmitFlags[EmitFlags["NoLeadingSourceMap"] = 512] = "NoLeadingSourceMap";
-        EmitFlags[EmitFlags["NoTrailingSourceMap"] = 1024] = "NoTrailingSourceMap";
-        EmitFlags[EmitFlags["NoSourceMap"] = 1536] = "NoSourceMap";
-        EmitFlags[EmitFlags["NoNestedSourceMaps"] = 2048] = "NoNestedSourceMaps";
-        EmitFlags[EmitFlags["NoTokenLeadingSourceMaps"] = 4096] = "NoTokenLeadingSourceMaps";
-        EmitFlags[EmitFlags["NoTokenTrailingSourceMaps"] = 8192] = "NoTokenTrailingSourceMaps";
-        EmitFlags[EmitFlags["NoTokenSourceMaps"] = 12288] = "NoTokenSourceMaps";
-        EmitFlags[EmitFlags["NoLeadingComments"] = 16384] = "NoLeadingComments";
-        EmitFlags[EmitFlags["NoTrailingComments"] = 32768] = "NoTrailingComments";
-        EmitFlags[EmitFlags["NoComments"] = 49152] = "NoComments";
-        EmitFlags[EmitFlags["NoNestedComments"] = 65536] = "NoNestedComments";
-        EmitFlags[EmitFlags["ExportName"] = 131072] = "ExportName";
-        EmitFlags[EmitFlags["LocalName"] = 262144] = "LocalName";
-        EmitFlags[EmitFlags["Indented"] = 524288] = "Indented";
-        EmitFlags[EmitFlags["NoIndentation"] = 1048576] = "NoIndentation";
-        EmitFlags[EmitFlags["AsyncFunctionBody"] = 2097152] = "AsyncFunctionBody";
-        EmitFlags[EmitFlags["ReuseTempVariableScope"] = 4194304] = "ReuseTempVariableScope";
-        EmitFlags[EmitFlags["CustomPrologue"] = 8388608] = "CustomPrologue";
-    })(ts.EmitFlags || (ts.EmitFlags = {}));
-    var EmitFlags = ts.EmitFlags;
+        EmitFlags[EmitFlags["SingleLine"] = 1] = "SingleLine";
+        EmitFlags[EmitFlags["AdviseOnEmitNode"] = 2] = "AdviseOnEmitNode";
+        EmitFlags[EmitFlags["NoSubstitution"] = 4] = "NoSubstitution";
+        EmitFlags[EmitFlags["CapturesThis"] = 8] = "CapturesThis";
+        EmitFlags[EmitFlags["NoLeadingSourceMap"] = 16] = "NoLeadingSourceMap";
+        EmitFlags[EmitFlags["NoTrailingSourceMap"] = 32] = "NoTrailingSourceMap";
+        EmitFlags[EmitFlags["NoSourceMap"] = 48] = "NoSourceMap";
+        EmitFlags[EmitFlags["NoNestedSourceMaps"] = 64] = "NoNestedSourceMaps";
+        EmitFlags[EmitFlags["NoTokenLeadingSourceMaps"] = 128] = "NoTokenLeadingSourceMaps";
+        EmitFlags[EmitFlags["NoTokenTrailingSourceMaps"] = 256] = "NoTokenTrailingSourceMaps";
+        EmitFlags[EmitFlags["NoTokenSourceMaps"] = 384] = "NoTokenSourceMaps";
+        EmitFlags[EmitFlags["NoLeadingComments"] = 512] = "NoLeadingComments";
+        EmitFlags[EmitFlags["NoTrailingComments"] = 1024] = "NoTrailingComments";
+        EmitFlags[EmitFlags["NoComments"] = 1536] = "NoComments";
+        EmitFlags[EmitFlags["NoNestedComments"] = 2048] = "NoNestedComments";
+        EmitFlags[EmitFlags["HelperName"] = 4096] = "HelperName";
+        EmitFlags[EmitFlags["ExportName"] = 8192] = "ExportName";
+        EmitFlags[EmitFlags["LocalName"] = 16384] = "LocalName";
+        EmitFlags[EmitFlags["InternalName"] = 32768] = "InternalName";
+        EmitFlags[EmitFlags["Indented"] = 65536] = "Indented";
+        EmitFlags[EmitFlags["NoIndentation"] = 131072] = "NoIndentation";
+        EmitFlags[EmitFlags["AsyncFunctionBody"] = 262144] = "AsyncFunctionBody";
+        EmitFlags[EmitFlags["ReuseTempVariableScope"] = 524288] = "ReuseTempVariableScope";
+        EmitFlags[EmitFlags["CustomPrologue"] = 1048576] = "CustomPrologue";
+        EmitFlags[EmitFlags["NoHoisting"] = 2097152] = "NoHoisting";
+        EmitFlags[EmitFlags["HasEndOfDeclarationMarker"] = 4194304] = "HasEndOfDeclarationMarker";
+        EmitFlags[EmitFlags["Iterator"] = 8388608] = "Iterator";
+        EmitFlags[EmitFlags["NoAsciiEscaping"] = 16777216] = "NoAsciiEscaping";
+    })(EmitFlags = ts.EmitFlags || (ts.EmitFlags = {}));
+    /**
+     * Used by the checker, this enum keeps track of external emit helpers that should be type
+     * checked.
+     */
     /* @internal */
-    (function (EmitContext) {
-        EmitContext[EmitContext["SourceFile"] = 0] = "SourceFile";
-        EmitContext[EmitContext["Expression"] = 1] = "Expression";
-        EmitContext[EmitContext["IdentifierName"] = 2] = "IdentifierName";
-        EmitContext[EmitContext["Unspecified"] = 3] = "Unspecified";
-    })(ts.EmitContext || (ts.EmitContext = {}));
-    var EmitContext = ts.EmitContext;
+    var ExternalEmitHelpers;
+    (function (ExternalEmitHelpers) {
+        ExternalEmitHelpers[ExternalEmitHelpers["Extends"] = 1] = "Extends";
+        ExternalEmitHelpers[ExternalEmitHelpers["Assign"] = 2] = "Assign";
+        ExternalEmitHelpers[ExternalEmitHelpers["Rest"] = 4] = "Rest";
+        ExternalEmitHelpers[ExternalEmitHelpers["Decorate"] = 8] = "Decorate";
+        ExternalEmitHelpers[ExternalEmitHelpers["Metadata"] = 16] = "Metadata";
+        ExternalEmitHelpers[ExternalEmitHelpers["Param"] = 32] = "Param";
+        ExternalEmitHelpers[ExternalEmitHelpers["Awaiter"] = 64] = "Awaiter";
+        ExternalEmitHelpers[ExternalEmitHelpers["Generator"] = 128] = "Generator";
+        ExternalEmitHelpers[ExternalEmitHelpers["Values"] = 256] = "Values";
+        ExternalEmitHelpers[ExternalEmitHelpers["Read"] = 512] = "Read";
+        ExternalEmitHelpers[ExternalEmitHelpers["Spread"] = 1024] = "Spread";
+        ExternalEmitHelpers[ExternalEmitHelpers["Await"] = 2048] = "Await";
+        ExternalEmitHelpers[ExternalEmitHelpers["AsyncGenerator"] = 4096] = "AsyncGenerator";
+        ExternalEmitHelpers[ExternalEmitHelpers["AsyncDelegator"] = 8192] = "AsyncDelegator";
+        ExternalEmitHelpers[ExternalEmitHelpers["AsyncValues"] = 16384] = "AsyncValues";
+        ExternalEmitHelpers[ExternalEmitHelpers["ExportStar"] = 32768] = "ExportStar";
+        // Helpers included by ES2015 for..of
+        ExternalEmitHelpers[ExternalEmitHelpers["ForOfIncludes"] = 256] = "ForOfIncludes";
+        // Helpers included by ES2017 for..await..of
+        ExternalEmitHelpers[ExternalEmitHelpers["ForAwaitOfIncludes"] = 16384] = "ForAwaitOfIncludes";
+        // Helpers included by ES2017 async generators
+        ExternalEmitHelpers[ExternalEmitHelpers["AsyncGeneratorIncludes"] = 6144] = "AsyncGeneratorIncludes";
+        // Helpers included by yield* in ES2017 async generators
+        ExternalEmitHelpers[ExternalEmitHelpers["AsyncDelegatorIncludes"] = 26624] = "AsyncDelegatorIncludes";
+        // Helpers included by ES2015 spread
+        ExternalEmitHelpers[ExternalEmitHelpers["SpreadIncludes"] = 1536] = "SpreadIncludes";
+        ExternalEmitHelpers[ExternalEmitHelpers["FirstEmitHelper"] = 1] = "FirstEmitHelper";
+        ExternalEmitHelpers[ExternalEmitHelpers["LastEmitHelper"] = 32768] = "LastEmitHelper";
+    })(ExternalEmitHelpers = ts.ExternalEmitHelpers || (ts.ExternalEmitHelpers = {}));
+    var EmitHint;
+    (function (EmitHint) {
+        EmitHint[EmitHint["SourceFile"] = 0] = "SourceFile";
+        EmitHint[EmitHint["Expression"] = 1] = "Expression";
+        EmitHint[EmitHint["IdentifierName"] = 2] = "IdentifierName";
+        EmitHint[EmitHint["Unspecified"] = 3] = "Unspecified";
+    })(EmitHint = ts.EmitHint || (ts.EmitHint = {}));
 })(ts || (ts = {}));
 /*@internal*/
 var ts;
@@ -1026,13 +1212,12 @@ var ts;
 })(ts || (ts = {}));
 /*@internal*/
 /** Performance measurements for the compiler. */
-var ts;
 (function (ts) {
     var performance;
     (function (performance) {
         var profilerEvent = typeof onProfilerEvent === "function" && onProfilerEvent.profiler === true
             ? onProfilerEvent
-            : function (markName) { };
+            : function (_markName) { };
         var enabled = false;
         var profilerStart = 0;
         var counts;
@@ -1045,8 +1230,8 @@ var ts;
          */
         function mark(markName) {
             if (enabled) {
-                marks[markName] = ts.timestamp();
-                counts[markName] = (counts[markName] || 0) + 1;
+                marks.set(markName, ts.timestamp());
+                counts.set(markName, (counts.get(markName) || 0) + 1);
                 profilerEvent(markName);
             }
         }
@@ -1062,9 +1247,9 @@ var ts;
          */
         function measure(measureName, startMarkName, endMarkName) {
             if (enabled) {
-                var end = endMarkName && marks[endMarkName] || ts.timestamp();
-                var start = startMarkName && marks[startMarkName] || profilerStart;
-                measures[measureName] = (measures[measureName] || 0) + (end - start);
+                var end = endMarkName && marks.get(endMarkName) || ts.timestamp();
+                var start = startMarkName && marks.get(startMarkName) || profilerStart;
+                measures.set(measureName, (measures.get(measureName) || 0) + (end - start));
             }
         }
         performance.measure = measure;
@@ -1074,7 +1259,7 @@ var ts;
          * @param markName The name of the mark.
          */
         function getCount(markName) {
-            return counts && counts[markName] || 0;
+            return counts && counts.get(markName) || 0;
         }
         performance.getCount = getCount;
         /**
@@ -1083,7 +1268,7 @@ var ts;
          * @param measureName The name of the measure whose durations should be accumulated.
          */
         function getDuration(measureName) {
-            return measures && measures[measureName] || 0;
+            return measures && measures.get(measureName) || 0;
         }
         performance.getDuration = getDuration;
         /**
@@ -1092,9 +1277,9 @@ var ts;
          * @param cb The action to perform for each measure
          */
         function forEachMeasure(cb) {
-            for (var key in measures) {
-                cb(key, measures[key]);
-            }
+            measures.forEach(function (measure, key) {
+                cb(key, measure);
+            });
         }
         performance.forEachMeasure = forEachMeasure;
         /** Enables (and resets) performance measurements for the compiler. */
@@ -1115,8 +1300,12 @@ var ts;
 })(ts || (ts = {}));
 /// <reference path="types.ts"/>
 /// <reference path="performance.ts" />
-/* @internal */
 var ts;
+(function (ts) {
+    /** The version of the TypeScript compiler release */
+    ts.version = "2.5.0";
+})(ts || (ts = {}));
+/* @internal */
 (function (ts) {
     /**
      * Ternary values are defined such that
@@ -1127,29 +1316,113 @@ var ts;
      * x | y is Maybe if either x or y is Maybe, but neither x or y is True.
      * x | y is True if either x or y is True.
      */
+    var Ternary;
     (function (Ternary) {
         Ternary[Ternary["False"] = 0] = "False";
         Ternary[Ternary["Maybe"] = 1] = "Maybe";
         Ternary[Ternary["True"] = -1] = "True";
-    })(ts.Ternary || (ts.Ternary = {}));
-    var Ternary = ts.Ternary;
-    var createObject = Object.create;
-    function createMap(template) {
-        var map = createObject(null); // tslint:disable-line:no-null-keyword
+    })(Ternary = ts.Ternary || (ts.Ternary = {}));
+    // More efficient to create a collator once and use its `compare` than to call `a.localeCompare(b)` many times.
+    ts.collator = typeof Intl === "object" && typeof Intl.Collator === "function" ? new Intl.Collator(/*locales*/ undefined, { usage: "sort", sensitivity: "accent" }) : undefined;
+    // Intl is missing in Safari, and node 0.10 treats "a" as greater than "B".
+    ts.localeCompareIsCorrect = ts.collator && ts.collator.compare("a", "B") < 0;
+    /** Create a MapLike with good performance. */
+    function createDictionaryObject() {
+        var map = Object.create(/*prototype*/ null); // tslint:disable-line:no-null-keyword
         // Using 'delete' on an object causes V8 to put the object in dictionary mode.
         // This disables creation of hidden classes, which are expensive when an object is
         // constantly changing shape.
         map["__"] = undefined;
         delete map["__"];
+        return map;
+    }
+    /** Create a new map. If a template object is provided, the map will copy entries from it. */
+    function createMap() {
+        return new MapCtr();
+    }
+    ts.createMap = createMap;
+    function createMapFromTemplate(template) {
+        var map = new MapCtr();
         // Copies keys/values from template. Note that for..in will not throw if
         // template is undefined, and instead will just exit the loop.
-        for (var key in template)
+        for (var key in template) {
             if (hasOwnProperty.call(template, key)) {
-                map[key] = template[key];
+                map.set(key, template[key]);
             }
+        }
         return map;
     }
-    ts.createMap = createMap;
+    ts.createMapFromTemplate = createMapFromTemplate;
+    // Internet Explorer's Map doesn't support iteration, so don't use it.
+    // tslint:disable-next-line:no-in-operator
+    var MapCtr = typeof Map !== "undefined" && "entries" in Map.prototype ? Map : shimMap();
+    // Keep the class inside a function so it doesn't get compiled if it's not used.
+    function shimMap() {
+        var MapIterator = (function () {
+            function MapIterator(data, selector) {
+                this.index = 0;
+                this.data = data;
+                this.selector = selector;
+                this.keys = Object.keys(data);
+            }
+            MapIterator.prototype.next = function () {
+                var index = this.index;
+                if (index < this.keys.length) {
+                    this.index++;
+                    return { value: this.selector(this.data, this.keys[index]), done: false };
+                }
+                return { value: undefined, done: true };
+            };
+            return MapIterator;
+        }());
+        return (function () {
+            function class_1() {
+                this.data = createDictionaryObject();
+                this.size = 0;
+            }
+            class_1.prototype.get = function (key) {
+                return this.data[key];
+            };
+            class_1.prototype.set = function (key, value) {
+                if (!this.has(key)) {
+                    this.size++;
+                }
+                this.data[key] = value;
+                return this;
+            };
+            class_1.prototype.has = function (key) {
+                // tslint:disable-next-line:no-in-operator
+                return key in this.data;
+            };
+            class_1.prototype.delete = function (key) {
+                if (this.has(key)) {
+                    this.size--;
+                    delete this.data[key];
+                    return true;
+                }
+                return false;
+            };
+            class_1.prototype.clear = function () {
+                this.data = createDictionaryObject();
+                this.size = 0;
+            };
+            class_1.prototype.keys = function () {
+                return new MapIterator(this.data, function (_data, key) { return key; });
+            };
+            class_1.prototype.values = function () {
+                return new MapIterator(this.data, function (data, key) { return data[key]; });
+            };
+            class_1.prototype.entries = function () {
+                return new MapIterator(this.data, function (data, key) { return [key, data[key]]; });
+            };
+            class_1.prototype.forEach = function (action) {
+                for (var key in this.data) {
+                    action(this.data[key], key);
+                }
+            };
+            return class_1;
+        }());
+    }
     function createFileMap(keyMapper) {
         var files = createMap();
         return {
@@ -1162,33 +1435,28 @@ var ts;
             clear: clear,
         };
         function forEachValueInMap(f) {
-            for (var key in files) {
-                f(key, files[key]);
-            }
+            files.forEach(function (file, key) {
+                f(key, file);
+            });
         }
         function getKeys() {
-            var keys = [];
-            for (var key in files) {
-                keys.push(key);
-            }
-            return keys;
+            return arrayFrom(files.keys());
         }
         // path should already be well-formed so it does not need to be normalized
         function get(path) {
-            return files[toKey(path)];
+            return files.get(toKey(path));
         }
         function set(path, value) {
-            files[toKey(path)] = value;
+            files.set(toKey(path), value);
         }
         function contains(path) {
-            return toKey(path) in files;
+            return files.has(toKey(path));
         }
         function remove(path) {
-            var key = toKey(path);
-            delete files[key];
+            files.delete(toKey(path));
         }
         function clear() {
-            files = createMap();
+            files.clear();
         }
         function toKey(path) {
             return keyMapper ? keyMapper(path) : path;
@@ -1202,12 +1470,16 @@ var ts;
         return getCanonicalFileName(nonCanonicalizedPath);
     }
     ts.toPath = toPath;
+    var Comparison;
     (function (Comparison) {
         Comparison[Comparison["LessThan"] = -1] = "LessThan";
         Comparison[Comparison["EqualTo"] = 0] = "EqualTo";
         Comparison[Comparison["GreaterThan"] = 1] = "GreaterThan";
-    })(ts.Comparison || (ts.Comparison = {}));
-    var Comparison = ts.Comparison;
+    })(Comparison = ts.Comparison || (ts.Comparison = {}));
+    function length(array) {
+        return array ? array.length : 0;
+    }
+    ts.length = length;
     /**
      * Iterates through 'array' by index and performs the callback on each element of array until the callback
      * returns a truthy value, then returns that value.
@@ -1215,7 +1487,7 @@ var ts;
      */
     function forEach(array, callback) {
         if (array) {
-            for (var i = 0, len = array.length; i < len; i++) {
+            for (var i = 0; i < array.length; i++) {
                 var result = callback(array[i], i);
                 if (result) {
                     return result;
@@ -1225,6 +1497,36 @@ var ts;
         return undefined;
     }
     ts.forEach = forEach;
+    function findAncestor(node, callback) {
+        while (node) {
+            var result = callback(node);
+            if (result === "quit") {
+                return undefined;
+            }
+            else if (result) {
+                return node;
+            }
+            node = node.parent;
+        }
+        return undefined;
+    }
+    ts.findAncestor = findAncestor;
+    function zipWith(arrayA, arrayB, callback) {
+        Debug.assert(arrayA.length === arrayB.length);
+        for (var i = 0; i < arrayA.length; i++) {
+            callback(arrayA[i], arrayB[i], i);
+        }
+    }
+    ts.zipWith = zipWith;
+    function zipToMap(keys, values) {
+        Debug.assert(keys.length === values.length);
+        var map = createMap();
+        for (var i = 0; i < keys.length; ++i) {
+            map.set(keys[i], values[i]);
+        }
+        return map;
+    }
+    ts.zipToMap = zipToMap;
     /**
      * Iterates through `array` by index and performs the callback on each element of array until the callback
      * returns a falsey value, then returns false.
@@ -1232,7 +1534,7 @@ var ts;
      */
     function every(array, callback) {
         if (array) {
-            for (var i = 0, len = array.length; i < len; i++) {
+            for (var i = 0; i < array.length; i++) {
                 if (!callback(array[i], i)) {
                     return false;
                 }
@@ -1243,7 +1545,7 @@ var ts;
     ts.every = every;
     /** Works like Array.prototype.find, returning `undefined` if no element satisfying the predicate is found. */
     function find(array, predicate) {
-        for (var i = 0, len = array.length; i < len; i++) {
+        for (var i = 0; i < array.length; i++) {
             var value = array[i];
             if (predicate(value, i)) {
                 return value;
@@ -1252,12 +1554,22 @@ var ts;
         return undefined;
     }
     ts.find = find;
+    /** Works like Array.prototype.findIndex, returning `-1` if no element satisfying the predicate is found. */
+    function findIndex(array, predicate) {
+        for (var i = 0; i < array.length; i++) {
+            if (predicate(array[i], i)) {
+                return i;
+            }
+        }
+        return -1;
+    }
+    ts.findIndex = findIndex;
     /**
      * Returns the first truthy result of `callback`, or else fails.
      * This is like `forEach`, but never returns undefined.
      */
     function findMap(array, callback) {
-        for (var i = 0, len = array.length; i < len; i++) {
+        for (var i = 0; i < array.length; i++) {
             var result = callback(array[i], i);
             if (result) {
                 return result;
@@ -1280,7 +1592,7 @@ var ts;
     ts.contains = contains;
     function indexOf(array, value) {
         if (array) {
-            for (var i = 0, len = array.length; i < len; i++) {
+            for (var i = 0; i < array.length; i++) {
                 if (array[i] === value) {
                     return i;
                 }
@@ -1290,7 +1602,7 @@ var ts;
     }
     ts.indexOf = indexOf;
     function indexOfAnyCharCode(text, charCodes, start) {
-        for (var i = start || 0, len = text.length; i < len; i++) {
+        for (var i = start || 0; i < text.length; i++) {
             if (contains(charCodes, text.charCodeAt(i))) {
                 return i;
             }
@@ -1366,13 +1678,33 @@ var ts;
         if (array) {
             result = [];
             for (var i = 0; i < array.length; i++) {
-                var v = array[i];
-                result.push(f(v, i));
+                result.push(f(array[i], i));
             }
         }
         return result;
     }
     ts.map = map;
+    // Maps from T to T and avoids allocation if all elements map to themselves
+    function sameMap(array, f) {
+        var result;
+        if (array) {
+            for (var i = 0; i < array.length; i++) {
+                if (result) {
+                    result.push(f(array[i], i));
+                }
+                else {
+                    var item = array[i];
+                    var mapped = f(item, i);
+                    if (item !== mapped) {
+                        result = array.slice(0, i);
+                        result.push(mapped);
+                    }
+                }
+            }
+        }
+        return result || array;
+    }
+    ts.sameMap = sameMap;
     /**
      * Flattens an array containing a mix of array or non-array elements.
      *
@@ -1422,6 +1754,47 @@ var ts;
         return result;
     }
     ts.flatMap = flatMap;
+    /**
+     * Maps an array. If the mapped value is an array, it is spread into the result.
+     * Avoids allocation if all elements map to themselves.
+     *
+     * @param array The array to map.
+     * @param mapfn The callback used to map the result into one or more values.
+     */
+    function sameFlatMap(array, mapfn) {
+        var result;
+        if (array) {
+            for (var i = 0; i < array.length; i++) {
+                var item = array[i];
+                var mapped = mapfn(item, i);
+                if (result || item !== mapped || isArray(mapped)) {
+                    if (!result) {
+                        result = array.slice(0, i);
+                    }
+                    if (isArray(mapped)) {
+                        addRange(result, mapped);
+                    }
+                    else {
+                        result.push(mapped);
+                    }
+                }
+            }
+        }
+        return result || array;
+    }
+    ts.sameFlatMap = sameFlatMap;
+    function mapDefined(array, mapFn) {
+        var result = [];
+        for (var i = 0; i < array.length; i++) {
+            var item = array[i];
+            var mapped = mapFn(item, i);
+            if (mapped !== undefined) {
+                result.push(mapped);
+            }
+        }
+        return result;
+    }
+    ts.mapDefined = mapDefined;
     /**
      * Computes the first matching span of elements and returns a tuple of the first span
      * and the remaining elements.
@@ -1480,25 +1853,39 @@ var ts;
         return result;
     }
     ts.spanMap = spanMap;
-    function mapObject(object, f) {
-        var result;
-        if (object) {
-            result = {};
-            for (var _i = 0, _a = getOwnKeys(object); _i < _a.length; _i++) {
-                var v = _a[_i];
-                var _b = f(v, object[v]) || [undefined, undefined], key = _b[0], value = _b[1];
-                if (key !== undefined) {
-                    result[key] = value;
+    function mapEntries(map, f) {
+        if (!map) {
+            return undefined;
+        }
+        var result = createMap();
+        map.forEach(function (value, key) {
+            var _a = f(key, value), newKey = _a[0], newValue = _a[1];
+            result.set(newKey, newValue);
+        });
+        return result;
+    }
+    ts.mapEntries = mapEntries;
+    function some(array, predicate) {
+        if (array) {
+            if (predicate) {
+                for (var _i = 0, array_5 = array; _i < array_5.length; _i++) {
+                    var v = array_5[_i];
+                    if (predicate(v)) {
+                        return true;
+                    }
                 }
             }
+            else {
+                return array.length > 0;
+            }
         }
-        return result;
+        return false;
     }
-    ts.mapObject = mapObject;
+    ts.some = some;
     function concatenate(array1, array2) {
-        if (!array2 || !array2.length)
+        if (!some(array2))
             return array1;
-        if (!array1 || !array1.length)
+        if (!some(array1))
             return array2;
         return array1.concat(array2);
     }
@@ -1508,8 +1895,8 @@ var ts;
         var result;
         if (array) {
             result = [];
-            loop: for (var _i = 0, array_5 = array; _i < array_5.length; _i++) {
-                var item = array_5[_i];
+            loop: for (var _i = 0, array_6 = array; _i < array_6.length; _i++) {
+                var item = array_6[_i];
                 for (var _a = 0, result_1 = result; _a < result_1.length; _a++) {
                     var res = result_1[_a];
                     if (areEqual ? areEqual(res, item) : res === item) {
@@ -1522,6 +1909,41 @@ var ts;
         return result;
     }
     ts.deduplicate = deduplicate;
+    function arrayIsEqualTo(array1, array2, equaler) {
+        if (!array1 || !array2) {
+            return array1 === array2;
+        }
+        if (array1.length !== array2.length) {
+            return false;
+        }
+        for (var i = 0; i < array1.length; i++) {
+            var equals = equaler ? equaler(array1[i], array2[i]) : array1[i] === array2[i];
+            if (!equals) {
+                return false;
+            }
+        }
+        return true;
+    }
+    ts.arrayIsEqualTo = arrayIsEqualTo;
+    function changesAffectModuleResolution(oldOptions, newOptions) {
+        return !oldOptions ||
+            (oldOptions.module !== newOptions.module) ||
+            (oldOptions.moduleResolution !== newOptions.moduleResolution) ||
+            (oldOptions.noResolve !== newOptions.noResolve) ||
+            (oldOptions.target !== newOptions.target) ||
+            (oldOptions.noLib !== newOptions.noLib) ||
+            (oldOptions.jsx !== newOptions.jsx) ||
+            (oldOptions.allowJs !== newOptions.allowJs) ||
+            (oldOptions.rootDir !== newOptions.rootDir) ||
+            (oldOptions.configFilePath !== newOptions.configFilePath) ||
+            (oldOptions.baseUrl !== newOptions.baseUrl) ||
+            (oldOptions.maxNodeModuleJsDepth !== newOptions.maxNodeModuleJsDepth) ||
+            !arrayIsEqualTo(oldOptions.lib, newOptions.lib) ||
+            !arrayIsEqualTo(oldOptions.typeRoots, newOptions.typeRoots) ||
+            !arrayIsEqualTo(oldOptions.rootDirs, newOptions.rootDirs) ||
+            !equalOwnProperties(oldOptions.paths, newOptions.paths);
+    }
+    ts.changesAffectModuleResolution = changesAffectModuleResolution;
     /**
      * Compacts an array, removing any falsey elements.
      */
@@ -1543,26 +1965,101 @@ var ts;
         return result || array;
     }
     ts.compact = compact;
+    /**
+     * Gets the relative complement of `arrayA` with respect to `b`, returning the elements that
+     * are not present in `arrayA` but are present in `arrayB`. Assumes both arrays are sorted
+     * based on the provided comparer.
+     */
+    function relativeComplement(arrayA, arrayB, comparer, offsetA, offsetB) {
+        if (comparer === void 0) { comparer = compareValues; }
+        if (offsetA === void 0) { offsetA = 0; }
+        if (offsetB === void 0) { offsetB = 0; }
+        if (!arrayB || !arrayA || arrayB.length === 0 || arrayA.length === 0)
+            return arrayB;
+        var result = [];
+        outer: for (; offsetB < arrayB.length; offsetB++) {
+            inner: for (; offsetA < arrayA.length; offsetA++) {
+                switch (comparer(arrayB[offsetB], arrayA[offsetA])) {
+                    case -1 /* LessThan */: break inner;
+                    case 0 /* EqualTo */: continue outer;
+                    case 1 /* GreaterThan */: continue inner;
+                }
+            }
+            result.push(arrayB[offsetB]);
+        }
+        return result;
+    }
+    ts.relativeComplement = relativeComplement;
     function sum(array, prop) {
         var result = 0;
-        for (var _i = 0, array_6 = array; _i < array_6.length; _i++) {
-            var v = array_6[_i];
+        for (var _i = 0, array_7 = array; _i < array_7.length; _i++) {
+            var v = array_7[_i];
             result += v[prop];
         }
         return result;
     }
     ts.sum = sum;
-    function addRange(to, from) {
-        if (to && from) {
-            for (var _i = 0, from_1 = from; _i < from_1.length; _i++) {
-                var v = from_1[_i];
-                if (v !== undefined) {
-                    to.push(v);
-                }
+    /**
+     * Appends a value to an array, returning the array.
+     *
+     * @param to The array to which `value` is to be appended. If `to` is `undefined`, a new array
+     * is created if `value` was appended.
+     * @param value The value to append to the array. If `value` is `undefined`, nothing is
+     * appended.
+     */
+    function append(to, value) {
+        if (value === undefined)
+            return to;
+        if (to === undefined)
+            return [value];
+        to.push(value);
+        return to;
+    }
+    ts.append = append;
+    /**
+     * Gets the actual offset into an array for a relative offset. Negative offsets indicate a
+     * position offset from the end of the array.
+     */
+    function toOffset(array, offset) {
+        return offset < 0 ? array.length + offset : offset;
+    }
+    /**
+     * Appends a range of value to an array, returning the array.
+     *
+     * @param to The array to which `value` is to be appended. If `to` is `undefined`, a new array
+     * is created if `value` was appended.
+     * @param from The values to append to the array. If `from` is `undefined`, nothing is
+     * appended. If an element of `from` is `undefined`, that element is not appended.
+     * @param start The offset in `from` at which to start copying values.
+     * @param end The offset in `from` at which to stop copying values (non-inclusive).
+     */
+    function addRange(to, from, start, end) {
+        if (from === undefined)
+            return to;
+        if (to === undefined)
+            return from.slice(start, end);
+        start = start === undefined ? 0 : toOffset(from, start);
+        end = end === undefined ? from.length : toOffset(from, end);
+        for (var i = start; i < end && i < from.length; i++) {
+            var v = from[i];
+            if (v !== undefined) {
+                to.push(from[i]);
             }
         }
+        return to;
     }
     ts.addRange = addRange;
+    /**
+     * Stable sort of an array. Elements equal to each other maintain their relative position in the array.
+     */
+    function stableSort(array, comparer) {
+        if (comparer === void 0) { comparer = compareValues; }
+        return array
+            .map(function (_, i) { return i; }) // create array of indices
+            .sort(function (x, y) { return comparer(array[x], array[y]) || compareValues(x, y); }) // sort indices by value then position
+            .map(function (i) { return array[i]; }); // get sorted array
+    }
+    ts.stableSort = stableSort;
     function rangeEquals(array1, array2, pos, end) {
         while (pos < end) {
             if (array1[pos] !== array2[pos]) {
@@ -1573,33 +2070,59 @@ var ts;
         return true;
     }
     ts.rangeEquals = rangeEquals;
+    /**
+     * Returns the element at a specific offset in an array if non-empty, `undefined` otherwise.
+     * A negative offset indicates the element should be retrieved from the end of the array.
+     */
+    function elementAt(array, offset) {
+        if (array) {
+            offset = toOffset(array, offset);
+            if (offset < array.length) {
+                return array[offset];
+            }
+        }
+        return undefined;
+    }
+    ts.elementAt = elementAt;
+    /**
+     * Returns the first element of an array if non-empty, `undefined` otherwise.
+     */
     function firstOrUndefined(array) {
-        return array && array.length > 0
-            ? array[0]
-            : undefined;
+        return elementAt(array, 0);
     }
     ts.firstOrUndefined = firstOrUndefined;
+    /**
+     * Returns the last element of an array if non-empty, `undefined` otherwise.
+     */
+    function lastOrUndefined(array) {
+        return elementAt(array, -1);
+    }
+    ts.lastOrUndefined = lastOrUndefined;
+    /**
+     * Returns the only element of an array if it contains only one element, `undefined` otherwise.
+     */
     function singleOrUndefined(array) {
         return array && array.length === 1
             ? array[0]
             : undefined;
     }
     ts.singleOrUndefined = singleOrUndefined;
+    /**
+     * Returns the only element of an array if it contains only one element; otheriwse, returns the
+     * array.
+     */
     function singleOrMany(array) {
         return array && array.length === 1
             ? array[0]
             : array;
     }
     ts.singleOrMany = singleOrMany;
-    /**
-     * Returns the last element of an array if non-empty, undefined otherwise.
-     */
-    function lastOrUndefined(array) {
-        return array && array.length > 0
-            ? array[array.length - 1]
-            : undefined;
+    function replaceElement(array, index, value) {
+        var result = array.slice(0);
+        result[index] = value;
+        return result;
     }
-    ts.lastOrUndefined = lastOrUndefined;
+    ts.replaceElement = replaceElement;
     /**
      * Performs a binary search, finding the index at which 'value' occurs in 'array'.
      * If no such index is found, returns the 2's-complement of first index at which
@@ -1607,11 +2130,11 @@ var ts;
      * @param array A sorted array whose first element must be no larger than number
      * @param number The value to be searched for in the array.
      */
-    function binarySearch(array, value, comparer) {
+    function binarySearch(array, value, comparer, offset) {
         if (!array || array.length === 0) {
             return -1;
         }
-        var low = 0;
+        var low = offset || 0;
         var high = array.length - 1;
         comparer = comparer !== undefined
             ? comparer
@@ -1684,9 +2207,6 @@ var ts;
     /**
      * Indicates whether a map-like contains an own property with the specified key.
      *
-     * NOTE: This is intended for use only with MapLike<T> objects. For Map<T> objects, use
-     *       the 'in' operator.
-     *
      * @param map A map-like.
      * @param key A property key.
      */
@@ -1697,9 +2217,6 @@ var ts;
     /**
      * Gets the value of an owned property in a map-like.
      *
-     * NOTE: This is intended for use only with MapLike<T> objects. For Map<T> objects, use
-     *       an indexer.
-     *
      * @param map A map-like.
      * @param key A property key.
      */
@@ -1717,54 +2234,69 @@ var ts;
      */
     function getOwnKeys(map) {
         var keys = [];
-        for (var key in map)
+        for (var key in map) {
             if (hasOwnProperty.call(map, key)) {
                 keys.push(key);
             }
+        }
         return keys;
     }
     ts.getOwnKeys = getOwnKeys;
-    /**
-     * Enumerates the properties of a Map<T>, invoking a callback and returning the first truthy result.
-     *
-     * @param map A map for which properties should be enumerated.
-     * @param callback A callback to invoke for each property.
-     */
-    function forEachProperty(map, callback) {
-        var result;
-        for (var key in map) {
-            if (result = callback(map[key], key))
-                break;
+    function arrayFrom(iterator, map) {
+        var result = [];
+        for (var _a = iterator.next(), value = _a.value, done = _a.done; !done; _b = iterator.next(), value = _b.value, done = _b.done, _b) {
+            result.push(map ? map(value) : value);
         }
         return result;
+        var _b;
     }
-    ts.forEachProperty = forEachProperty;
-    /**
-     * Returns true if a Map<T> has some matching property.
-     *
-     * @param map A map whose properties should be tested.
-     * @param predicate An optional callback used to test each property.
-     */
-    function someProperties(map, predicate) {
-        for (var key in map) {
-            if (!predicate || predicate(map[key], key))
-                return true;
+    ts.arrayFrom = arrayFrom;
+    function convertToArray(iterator, f) {
+        var result = [];
+        for (var _a = iterator.next(), value = _a.value, done = _a.done; !done; _b = iterator.next(), value = _b.value, done = _b.done, _b) {
+            result.push(f(value));
         }
-        return false;
+        return result;
+        var _b;
     }
-    ts.someProperties = someProperties;
+    ts.convertToArray = convertToArray;
     /**
-     * Performs a shallow copy of the properties from a source Map<T> to a target MapLike<T>
-     *
-     * @param source A map from which properties should be copied.
-     * @param target A map to which properties should be copied.
+     * Calls `callback` for each entry in the map, returning the first truthy result.
+     * Use `map.forEach` instead for normal iteration.
      */
-    function copyProperties(source, target) {
-        for (var key in source) {
-            target[key] = source[key];
+    function forEachEntry(map, callback) {
+        var iterator = map.entries();
+        for (var _a = iterator.next(), pair = _a.value, done = _a.done; !done; _b = iterator.next(), pair = _b.value, done = _b.done, _b) {
+            var key = pair[0], value = pair[1];
+            var result = callback(value, key);
+            if (result) {
+                return result;
+            }
+        }
+        return undefined;
+        var _b;
+    }
+    ts.forEachEntry = forEachEntry;
+    /** `forEachEntry` for just keys. */
+    function forEachKey(map, callback) {
+        var iterator = map.keys();
+        for (var _a = iterator.next(), key = _a.value, done = _a.done; !done; _b = iterator.next(), key = _b.value, done = _b.done, _b) {
+            var result = callback(key);
+            if (result) {
+                return result;
+            }
         }
+        return undefined;
+        var _b;
+    }
+    ts.forEachKey = forEachKey;
+    /** Copy entries from `source` to `target`. */
+    function copyEntries(source, target) {
+        source.forEach(function (value, key) {
+            target.set(key, value);
+        });
     }
-    ts.copyProperties = copyProperties;
+    ts.copyEntries = copyEntries;
     function assign(t) {
         var args = [];
         for (var _i = 1; _i < arguments.length; _i++) {
@@ -1772,51 +2304,15 @@ var ts;
         }
         for (var _a = 0, args_1 = args; _a < args_1.length; _a++) {
             var arg = args_1[_a];
-            for (var _b = 0, _c = getOwnKeys(arg); _b < _c.length; _b++) {
-                var p = _c[_b];
-                t[p] = arg[p];
+            for (var p in arg) {
+                if (hasProperty(arg, p)) {
+                    t[p] = arg[p];
+                }
             }
         }
         return t;
     }
     ts.assign = assign;
-    /**
-     * Reduce the properties of a map.
-     *
-     * NOTE: This is intended for use with Map<T> objects. For MapLike<T> objects, use
-     *       reduceOwnProperties instead as it offers better runtime safety.
-     *
-     * @param map The map to reduce
-     * @param callback An aggregation function that is called for each entry in the map
-     * @param initial The initial value for the reduction.
-     */
-    function reduceProperties(map, callback, initial) {
-        var result = initial;
-        for (var key in map) {
-            result = callback(result, map[key], String(key));
-        }
-        return result;
-    }
-    ts.reduceProperties = reduceProperties;
-    /**
-     * Reduce the properties defined on a map-like (but not from its prototype chain).
-     *
-     * NOTE: This is intended for use with MapLike<T> objects. For Map<T> objects, use
-     *       reduceProperties instead as it offers better performance.
-     *
-     * @param map The map-like to reduce
-     * @param callback An aggregation function that is called for each entry in the map
-     * @param initial The initial value for the reduction.
-     */
-    function reduceOwnProperties(map, callback, initial) {
-        var result = initial;
-        for (var key in map)
-            if (hasOwnProperty.call(map, key)) {
-                result = callback(result, map[key], String(key));
-            }
-        return result;
-    }
-    ts.reduceOwnProperties = reduceOwnProperties;
     /**
      * Performs a shallow equality comparison of the contents of two map-likes.
      *
@@ -1828,42 +2324,35 @@ var ts;
             return true;
         if (!left || !right)
             return false;
-        for (var key in left)
+        for (var key in left) {
             if (hasOwnProperty.call(left, key)) {
                 if (!hasOwnProperty.call(right, key) === undefined)
                     return false;
                 if (equalityComparer ? !equalityComparer(left[key], right[key]) : left[key] !== right[key])
                     return false;
             }
-        for (var key in right)
+        }
+        for (var key in right) {
             if (hasOwnProperty.call(right, key)) {
                 if (!hasOwnProperty.call(left, key))
                     return false;
             }
+        }
         return true;
     }
     ts.equalOwnProperties = equalOwnProperties;
     function arrayToMap(array, makeKey, makeValue) {
         var result = createMap();
-        for (var _i = 0, array_7 = array; _i < array_7.length; _i++) {
-            var value = array_7[_i];
-            result[makeKey(value)] = makeValue ? makeValue(value) : value;
+        for (var _i = 0, array_8 = array; _i < array_8.length; _i++) {
+            var value = array_8[_i];
+            result.set(makeKey(value), makeValue ? makeValue(value) : value);
         }
         return result;
     }
     ts.arrayToMap = arrayToMap;
-    function isEmpty(map) {
-        for (var id in map) {
-            if (hasProperty(map, id)) {
-                return false;
-            }
-        }
-        return true;
-    }
-    ts.isEmpty = isEmpty;
     function cloneMap(map) {
         var clone = createMap();
-        copyProperties(map, clone);
+        copyEntries(map, clone);
         return clone;
     }
     ts.cloneMap = cloneMap;
@@ -1879,47 +2368,45 @@ var ts;
     ts.clone = clone;
     function extend(first, second) {
         var result = {};
-        for (var id in second)
+        for (var id in second) {
             if (hasOwnProperty.call(second, id)) {
                 result[id] = second[id];
             }
-        for (var id in first)
+        }
+        for (var id in first) {
             if (hasOwnProperty.call(first, id)) {
                 result[id] = first[id];
             }
+        }
         return result;
     }
     ts.extend = extend;
-    /**
-     * Adds the value to an array of values associated with the key, and returns the array.
-     * Creates the array if it does not already exist.
-     */
-    function multiMapAdd(map, key, value) {
-        var values = map[key];
+    function createMultiMap() {
+        var map = createMap();
+        map.add = multiMapAdd;
+        map.remove = multiMapRemove;
+        return map;
+    }
+    ts.createMultiMap = createMultiMap;
+    function multiMapAdd(key, value) {
+        var values = this.get(key);
         if (values) {
             values.push(value);
-            return values;
         }
         else {
-            return map[key] = [value];
+            this.set(key, values = [value]);
         }
+        return values;
     }
-    ts.multiMapAdd = multiMapAdd;
-    /**
-     * Removes a value from an array of values associated with the key.
-     * Does not preserve the order of those values.
-     * Does nothing if `key` is not in `map`, or `value` is not in `map[key]`.
-     */
-    function multiMapRemove(map, key, value) {
-        var values = map[key];
+    function multiMapRemove(key, value) {
+        var values = this.get(key);
         if (values) {
             unorderedRemoveItem(values, value);
             if (!values.length) {
-                delete map[key];
+                this.delete(key);
             }
         }
     }
-    ts.multiMapRemove = multiMapRemove;
     /**
      * Tests whether a value is an array.
      */
@@ -1927,6 +2414,24 @@ var ts;
         return Array.isArray ? Array.isArray(value) : value instanceof Array;
     }
     ts.isArray = isArray;
+    function tryCast(value, test) {
+        return value !== undefined && test(value) ? value : undefined;
+    }
+    ts.tryCast = tryCast;
+    function cast(value, test) {
+        if (value !== undefined && test(value))
+            return value;
+        Debug.fail("Invalid cast. The supplied value did not pass the test '" + Debug.getFunctionName(test) + "'.");
+    }
+    ts.cast = cast;
+    /** Does nothing. */
+    function noop() { }
+    ts.noop = noop;
+    /** Throws an error because a function is not implemented. */
+    function notImplemented() {
+        throw new Error("Not implemented");
+    }
+    ts.notImplemented = notImplemented;
     function memoize(callback) {
         var value;
         return function () {
@@ -1959,7 +2464,7 @@ var ts;
             return function (t) { return compose(a(t)); };
         }
         else {
-            return function (t) { return function (u) { return u; }; };
+            return function (_) { return function (u) { return u; }; };
         }
     }
     ts.chain = chain;
@@ -1990,8 +2495,9 @@ var ts;
     ts.compose = compose;
     function formatStringFromArgs(text, args, baseIndex) {
         baseIndex = baseIndex || 0;
-        return text.replace(/{(\d+)}/g, function (match, index) { return args[+index + baseIndex]; });
+        return text.replace(/{(\d+)}/g, function (_match, index) { return args[+index + baseIndex]; });
     }
+    ts.formatStringFromArgs = formatStringFromArgs;
     ts.localizedDiagnosticMessages = undefined;
     function getLocaleSpecificMessage(message) {
         return ts.localizedDiagnosticMessages && ts.localizedDiagnosticMessages[message.key] || message.message;
@@ -2020,7 +2526,7 @@ var ts;
     }
     ts.createFileDiagnostic = createFileDiagnostic;
     /* internal */
-    function formatMessage(dummy, message) {
+    function formatMessage(_dummy, message) {
         var text = getLocaleSpecificMessage(message);
         if (arguments.length > 2) {
             text = formatStringFromArgs(text, arguments, 2);
@@ -2043,6 +2549,17 @@ var ts;
         };
     }
     ts.createCompilerDiagnostic = createCompilerDiagnostic;
+    function createCompilerDiagnosticFromMessageChain(chain) {
+        return {
+            file: undefined,
+            start: undefined,
+            length: undefined,
+            code: chain.code,
+            category: chain.category,
+            messageText: chain.next ? chain : chain.messageText
+        };
+    }
+    ts.createCompilerDiagnosticFromMessageChain = createCompilerDiagnosticFromMessageChain;
     function chainDiagnosticMessages(details, message) {
         var text = getLocaleSpecificMessage(message);
         if (arguments.length > 2) {
@@ -2083,8 +2600,12 @@ var ts;
         if (b === undefined)
             return 1 /* GreaterThan */;
         if (ignoreCase) {
-            if (String.prototype.localeCompare) {
-                var result = a.localeCompare(b, /*locales*/ undefined, { usage: "sort", sensitivity: "accent" });
+            // Checking if "collator exists indicates that Intl is available.
+            // We still have to check if "collator.compare" is correct. If it is not, use "String.localeComapre"
+            if (ts.collator) {
+                var result = ts.localeCompareIsCorrect ?
+                    ts.collator.compare(a, b) :
+                    a.localeCompare(b, /*locales*/ undefined, { usage: "sort", sensitivity: "accent" }); // accent means a ≠ b, a ≠ á, a = A
                 return result < 0 ? -1 /* LessThan */ : result > 0 ? 1 /* GreaterThan */ : 0 /* EqualTo */;
             }
             a = a.toUpperCase();
@@ -2155,7 +2676,9 @@ var ts;
         return path.replace(/\\/g, "/");
     }
     ts.normalizeSlashes = normalizeSlashes;
-    // Returns length of path root (i.e. length of "/", "x:/", "//server/share/, file:///user/files")
+    /**
+     * Returns length of path root (i.e. length of "/", "x:/", "//server/share/, file:///user/files")
+     */
     function getRootLength(path) {
         if (path.charCodeAt(0) === 47 /* slash */) {
             if (path.charCodeAt(1) !== 47 /* slash */)
@@ -2188,6 +2711,11 @@ var ts;
         return 0;
     }
     ts.getRootLength = getRootLength;
+    /**
+     * Internally, we represent paths as strings with '/' as the directory separator.
+     * When we make system calls (eg: LanguageServiceHost.getDirectory()),
+     * we expect the host to correctly handle paths in our specified format.
+     */
     ts.directorySeparator = "/";
     var directorySeparatorCharCode = 47 /* slash */;
     function getNormalizedParts(normalizedSlashedPath, rootLength) {
@@ -2250,9 +2778,17 @@ var ts;
     function getEmitModuleKind(compilerOptions) {
         return typeof compilerOptions.module === "number" ?
             compilerOptions.module :
-            getEmitScriptTarget(compilerOptions) === 2 /* ES6 */ ? ts.ModuleKind.ES6 : ts.ModuleKind.CommonJS;
+            getEmitScriptTarget(compilerOptions) >= 2 /* ES2015 */ ? ts.ModuleKind.ES2015 : ts.ModuleKind.CommonJS;
     }
     ts.getEmitModuleKind = getEmitModuleKind;
+    function getEmitModuleResolutionKind(compilerOptions) {
+        var moduleResolution = compilerOptions.moduleResolution;
+        if (moduleResolution === undefined) {
+            moduleResolution = getEmitModuleKind(compilerOptions) === ts.ModuleKind.CommonJS ? ts.ModuleResolutionKind.NodeJs : ts.ModuleResolutionKind.Classic;
+        }
+        return moduleResolution;
+    }
+    ts.getEmitModuleResolutionKind = getEmitModuleResolutionKind;
     /* @internal */
     function hasZeroOrOneAsteriskCharacter(str) {
         var seenAsterisk = false;
@@ -2477,16 +3013,26 @@ var ts;
     }
     ts.startsWith = startsWith;
     /* @internal */
+    function removePrefix(str, prefix) {
+        return startsWith(str, prefix) ? str.substr(prefix.length) : str;
+    }
+    ts.removePrefix = removePrefix;
+    /* @internal */
     function endsWith(str, suffix) {
         var expectedPos = str.length - suffix.length;
         return expectedPos >= 0 && str.indexOf(suffix, expectedPos) === expectedPos;
     }
     ts.endsWith = endsWith;
+    function hasExtension(fileName) {
+        return getBaseFileName(fileName).indexOf(".") >= 0;
+    }
+    ts.hasExtension = hasExtension;
     function fileExtensionIs(path, extension) {
         return path.length > extension.length && endsWith(path, extension);
     }
     ts.fileExtensionIs = fileExtensionIs;
-    function fileExtensionIsAny(path, extensions) {
+    /* @internal */
+    function fileExtensionIsOneOf(path, extensions) {
         for (var _i = 0, extensions_1 = extensions; _i < extensions_1.length; _i++) {
             var extension = extensions_1[_i];
             if (fileExtensionIs(path, extension)) {
@@ -2495,7 +3041,7 @@ var ts;
         }
         return false;
     }
-    ts.fileExtensionIsAny = fileExtensionIsAny;
+    ts.fileExtensionIsOneOf = fileExtensionIsOneOf;
     // Reserved characters, forces escaping of any non-word (or digit), non-whitespace character.
     // It may be inefficient (we could just match (/[-[\]{}()*+?.,\\^$|#\s]/g), but this is future
     // proof.
@@ -2510,6 +3056,17 @@ var ts;
     var singleAsteriskRegexFragmentFiles = "([^./]|(\\.(?!min\\.js$))?)*";
     var singleAsteriskRegexFragmentOther = "[^/]*";
     function getRegularExpressionForWildcard(specs, basePath, usage) {
+        var patterns = getRegularExpressionsForWildcards(specs, basePath, usage);
+        if (!patterns || !patterns.length) {
+            return undefined;
+        }
+        var pattern = patterns.map(function (pattern) { return "(" + pattern + ")"; }).join("|");
+        // If excluding, match "foo/bar/baz...", but if including, only allow "foo".
+        var terminator = usage === "exclude" ? "($|/)" : "$";
+        return "^(" + pattern + ")" + terminator;
+    }
+    ts.getRegularExpressionForWildcard = getRegularExpressionForWildcard;
+    function getRegularExpressionsForWildcards(specs, basePath, usage) {
         if (specs === undefined || specs.length === 0) {
             return undefined;
         }
@@ -2520,75 +3077,74 @@ var ts;
          * files or directories, does not match subdirectories that start with a . character
          */
         var doubleAsteriskRegexFragment = usage === "exclude" ? "(/.+?)?" : "(/[^/.][^/]*)*?";
-        var pattern = "";
-        var hasWrittenSubpattern = false;
-        spec: for (var _i = 0, specs_1 = specs; _i < specs_1.length; _i++) {
-            var spec = specs_1[_i];
-            if (!spec) {
-                continue;
+        return flatMap(specs, function (spec) {
+            return spec && getSubPatternFromSpec(spec, basePath, usage, singleAsteriskRegexFragment, doubleAsteriskRegexFragment, replaceWildcardCharacter);
+        });
+    }
+    /**
+     * An "includes" path "foo" is implicitly a glob "foo/** /*" (without the space) if its last component has no extension,
+     * and does not contain any glob characters itself.
+     */
+    function isImplicitGlob(lastPathComponent) {
+        return !/[.*?]/.test(lastPathComponent);
+    }
+    ts.isImplicitGlob = isImplicitGlob;
+    function getSubPatternFromSpec(spec, basePath, usage, singleAsteriskRegexFragment, doubleAsteriskRegexFragment, replaceWildcardCharacter) {
+        var subpattern = "";
+        var hasRecursiveDirectoryWildcard = false;
+        var hasWrittenComponent = false;
+        var components = getNormalizedPathComponents(spec, basePath);
+        var lastComponent = lastOrUndefined(components);
+        if (usage !== "exclude" && lastComponent === "**") {
+            return undefined;
+        }
+        // getNormalizedPathComponents includes the separator for the root component.
+        // We need to remove to create our regex correctly.
+        components[0] = removeTrailingDirectorySeparator(components[0]);
+        if (isImplicitGlob(lastComponent)) {
+            components.push("**", "*");
+        }
+        var optionalCount = 0;
+        for (var _i = 0, components_1 = components; _i < components_1.length; _i++) {
+            var component = components_1[_i];
+            if (component === "**") {
+                if (hasRecursiveDirectoryWildcard) {
+                    return undefined;
+                }
+                subpattern += doubleAsteriskRegexFragment;
+                hasRecursiveDirectoryWildcard = true;
             }
-            var subpattern = "";
-            var hasRecursiveDirectoryWildcard = false;
-            var hasWrittenComponent = false;
-            var components = getNormalizedPathComponents(spec, basePath);
-            if (usage !== "exclude" && components[components.length - 1] === "**") {
-                continue spec;
-            }
-            // getNormalizedPathComponents includes the separator for the root component.
-            // We need to remove to create our regex correctly.
-            components[0] = removeTrailingDirectorySeparator(components[0]);
-            var optionalCount = 0;
-            for (var _a = 0, components_1 = components; _a < components_1.length; _a++) {
-                var component = components_1[_a];
-                if (component === "**") {
-                    if (hasRecursiveDirectoryWildcard) {
-                        continue spec;
-                    }
-                    subpattern += doubleAsteriskRegexFragment;
-                    hasRecursiveDirectoryWildcard = true;
-                    hasWrittenComponent = true;
+            else {
+                if (usage === "directories") {
+                    subpattern += "(";
+                    optionalCount++;
                 }
-                else {
-                    if (usage === "directories") {
-                        subpattern += "(";
-                        optionalCount++;
-                    }
-                    if (hasWrittenComponent) {
-                        subpattern += ts.directorySeparator;
+                if (hasWrittenComponent) {
+                    subpattern += ts.directorySeparator;
+                }
+                if (usage !== "exclude") {
+                    // The * and ? wildcards should not match directories or files that start with . if they
+                    // appear first in a component. Dotted directories and files can be included explicitly
+                    // like so: **/.*/.*
+                    if (component.charCodeAt(0) === 42 /* asterisk */) {
+                        subpattern += "([^./]" + singleAsteriskRegexFragment + ")?";
+                        component = component.substr(1);
                     }
-                    if (usage !== "exclude") {
-                        // The * and ? wildcards should not match directories or files that start with . if they
-                        // appear first in a component. Dotted directories and files can be included explicitly
-                        // like so: **/.*/.*
-                        if (component.charCodeAt(0) === 42 /* asterisk */) {
-                            subpattern += "([^./]" + singleAsteriskRegexFragment + ")?";
-                            component = component.substr(1);
-                        }
-                        else if (component.charCodeAt(0) === 63 /* question */) {
-                            subpattern += "[^./]";
-                            component = component.substr(1);
-                        }
+                    else if (component.charCodeAt(0) === 63 /* question */) {
+                        subpattern += "[^./]";
+                        component = component.substr(1);
                     }
-                    subpattern += component.replace(reservedCharacterPattern, replaceWildcardCharacter);
-                    hasWrittenComponent = true;
                 }
+                subpattern += component.replace(reservedCharacterPattern, replaceWildcardCharacter);
             }
-            while (optionalCount > 0) {
-                subpattern += ")?";
-                optionalCount--;
-            }
-            if (hasWrittenSubpattern) {
-                pattern += "|";
-            }
-            pattern += "(" + subpattern + ")";
-            hasWrittenSubpattern = true;
+            hasWrittenComponent = true;
         }
-        if (!pattern) {
-            return undefined;
+        while (optionalCount > 0) {
+            subpattern += ")?";
+            optionalCount--;
         }
-        return "^(" + pattern + (usage === "exclude" ? ")($|/)" : ")$");
+        return subpattern;
     }
-    ts.getRegularExpressionForWildcard = getRegularExpressionForWildcard;
     function replaceWildCardCharacterFiles(match) {
         return replaceWildcardCharacter(match, singleAsteriskRegexFragmentFiles);
     }
@@ -2598,11 +3154,12 @@ var ts;
     function replaceWildcardCharacter(match, singleAsteriskRegexFragment) {
         return match === "*" ? singleAsteriskRegexFragment : match === "?" ? "[^/]" : "\\" + match;
     }
-    function getFileMatcherPatterns(path, extensions, excludes, includes, useCaseSensitiveFileNames, currentDirectory) {
+    function getFileMatcherPatterns(path, excludes, includes, useCaseSensitiveFileNames, currentDirectory) {
         path = normalizePath(path);
         currentDirectory = normalizePath(currentDirectory);
         var absolutePath = combinePaths(currentDirectory, path);
         return {
+            includeFilePatterns: map(getRegularExpressionsForWildcards(includes, absolutePath, "files"), function (pattern) { return "^" + pattern + "$"; }),
             includeFilePattern: getRegularExpressionForWildcard(includes, absolutePath, "files"),
             includeDirectoryPattern: getRegularExpressionForWildcard(includes, absolutePath, "directories"),
             excludePattern: getRegularExpressionForWildcard(excludes, absolutePath, "exclude"),
@@ -2613,28 +3170,44 @@ var ts;
     function matchFiles(path, extensions, excludes, includes, useCaseSensitiveFileNames, currentDirectory, getFileSystemEntries) {
         path = normalizePath(path);
         currentDirectory = normalizePath(currentDirectory);
-        var patterns = getFileMatcherPatterns(path, extensions, excludes, includes, useCaseSensitiveFileNames, currentDirectory);
+        var patterns = getFileMatcherPatterns(path, excludes, includes, useCaseSensitiveFileNames, currentDirectory);
         var regexFlag = useCaseSensitiveFileNames ? "" : "i";
-        var includeFileRegex = patterns.includeFilePattern && new RegExp(patterns.includeFilePattern, regexFlag);
+        var includeFileRegexes = patterns.includeFilePatterns && patterns.includeFilePatterns.map(function (pattern) { return new RegExp(pattern, regexFlag); });
         var includeDirectoryRegex = patterns.includeDirectoryPattern && new RegExp(patterns.includeDirectoryPattern, regexFlag);
         var excludeRegex = patterns.excludePattern && new RegExp(patterns.excludePattern, regexFlag);
-        var result = [];
+        // Associate an array of results with each include regex. This keeps results in order of the "include" order.
+        // If there are no "includes", then just put everything in results[0].
+        var results = includeFileRegexes ? includeFileRegexes.map(function () { return []; }) : [[]];
+        var comparer = useCaseSensitiveFileNames ? compareStrings : compareStringsCaseInsensitive;
         for (var _i = 0, _a = patterns.basePaths; _i < _a.length; _i++) {
             var basePath = _a[_i];
             visitDirectory(basePath, combinePaths(currentDirectory, basePath));
         }
-        return result;
+        return flatten(results);
         function visitDirectory(path, absolutePath) {
             var _a = getFileSystemEntries(path), files = _a.files, directories = _a.directories;
-            for (var _i = 0, files_1 = files; _i < files_1.length; _i++) {
-                var current = files_1[_i];
+            files = files.slice().sort(comparer);
+            directories = directories.slice().sort(comparer);
+            var _loop_1 = function (current) {
                 var name_1 = combinePaths(path, current);
                 var absoluteName = combinePaths(absolutePath, current);
-                if ((!extensions || fileExtensionIsAny(name_1, extensions)) &&
-                    (!includeFileRegex || includeFileRegex.test(absoluteName)) &&
-                    (!excludeRegex || !excludeRegex.test(absoluteName))) {
-                    result.push(name_1);
+                if (extensions && !fileExtensionIsOneOf(name_1, extensions))
+                    return "continue";
+                if (excludeRegex && excludeRegex.test(absoluteName))
+                    return "continue";
+                if (!includeFileRegexes) {
+                    results[0].push(name_1);
                 }
+                else {
+                    var includeIndex = findIndex(includeFileRegexes, function (re) { return re.test(absoluteName); });
+                    if (includeIndex !== -1) {
+                        results[includeIndex].push(name_1);
+                    }
+                }
+            };
+            for (var _i = 0, files_1 = files; _i < files_1.length; _i++) {
+                var current = files_1[_i];
+                _loop_1(current);
             }
             for (var _b = 0, directories_1 = directories; _b < directories_1.length; _b++) {
                 var current = directories_1[_b];
@@ -2662,29 +3235,35 @@ var ts;
                 // We also need to check the relative paths by converting them to absolute and normalizing
                 // in case they escape the base path (e.g "..\somedirectory")
                 var absolute = isRootedDiskPath(include) ? include : normalizePath(combinePaths(path, include));
-                var wildcardOffset = indexOfAnyCharCode(absolute, wildcardCharCodes);
-                var includeBasePath = wildcardOffset < 0
-                    ? removeTrailingDirectorySeparator(getDirectoryPath(absolute))
-                    : absolute.substring(0, absolute.lastIndexOf(ts.directorySeparator, wildcardOffset));
                 // Append the literal and canonical candidate base paths.
-                includeBasePaths.push(includeBasePath);
+                includeBasePaths.push(getIncludeBasePath(absolute));
             }
             // Sort the offsets array using either the literal or canonical path representations.
             includeBasePaths.sort(useCaseSensitiveFileNames ? compareStrings : compareStringsCaseInsensitive);
+            var _loop_2 = function (includeBasePath) {
+                if (ts.every(basePaths, function (basePath) { return !containsPath(basePath, includeBasePath, path, !useCaseSensitiveFileNames); })) {
+                    basePaths.push(includeBasePath);
+                }
+            };
             // Iterate over each include base path and include unique base paths that are not a
             // subpath of an existing base path
-            include: for (var i = 0; i < includeBasePaths.length; i++) {
-                var includeBasePath = includeBasePaths[i];
-                for (var j = 0; j < basePaths.length; j++) {
-                    if (containsPath(basePaths[j], includeBasePath, path, !useCaseSensitiveFileNames)) {
-                        continue include;
-                    }
-                }
-                basePaths.push(includeBasePath);
+            for (var _a = 0, includeBasePaths_1 = includeBasePaths; _a < includeBasePaths_1.length; _a++) {
+                var includeBasePath = includeBasePaths_1[_a];
+                _loop_2(includeBasePath);
             }
         }
         return basePaths;
     }
+    function getIncludeBasePath(absolute) {
+        var wildcardOffset = indexOfAnyCharCode(absolute, wildcardCharCodes);
+        if (wildcardOffset < 0) {
+            // No "*" or "?" in the path
+            return !hasExtension(absolute)
+                ? absolute
+                : removeTrailingDirectorySeparator(getDirectoryPath(absolute));
+        }
+        return absolute.substring(0, absolute.lastIndexOf(ts.directorySeparator, wildcardOffset));
+    }
     function ensureScriptKind(fileName, scriptKind) {
         // Using scriptKind as a condition handles both:
         // - 'scriptKind' is unspecified and thus it is `undefined`
@@ -2698,14 +3277,16 @@ var ts;
     function getScriptKindFromFileName(fileName) {
         var ext = fileName.substr(fileName.lastIndexOf("."));
         switch (ext.toLowerCase()) {
-            case ".js":
+            case ".js" /* Js */:
                 return 1 /* JS */;
-            case ".jsx":
+            case ".jsx" /* Jsx */:
                 return 2 /* JSX */;
-            case ".ts":
+            case ".ts" /* Ts */:
                 return 3 /* TS */;
-            case ".tsx":
+            case ".tsx" /* Tsx */:
                 return 4 /* TSX */;
+            case ".json":
+                return 6 /* JSON */;
             default:
                 return 0 /* Unknown */;
         }
@@ -2714,13 +3295,24 @@ var ts;
     /**
      *  List of supported extensions in order of file resolution precedence.
      */
-    ts.supportedTypeScriptExtensions = [".ts", ".tsx", ".d.ts"];
+    ts.supportedTypeScriptExtensions = [".ts" /* Ts */, ".tsx" /* Tsx */, ".d.ts" /* Dts */];
     /** Must have ".d.ts" first because if ".ts" goes first, that will be detected as the extension instead of ".d.ts". */
-    ts.supportedTypescriptExtensionsForExtractExtension = [".d.ts", ".ts", ".tsx"];
-    ts.supportedJavascriptExtensions = [".js", ".jsx"];
+    ts.supportedTypescriptExtensionsForExtractExtension = [".d.ts" /* Dts */, ".ts" /* Ts */, ".tsx" /* Tsx */];
+    ts.supportedJavascriptExtensions = [".js" /* Js */, ".jsx" /* Jsx */];
     var allSupportedExtensions = ts.supportedTypeScriptExtensions.concat(ts.supportedJavascriptExtensions);
-    function getSupportedExtensions(options) {
-        return options && options.allowJs ? allSupportedExtensions : ts.supportedTypeScriptExtensions;
+    function getSupportedExtensions(options, extraFileExtensions) {
+        var needAllExtensions = options && options.allowJs;
+        if (!extraFileExtensions || extraFileExtensions.length === 0 || !needAllExtensions) {
+            return needAllExtensions ? allSupportedExtensions : ts.supportedTypeScriptExtensions;
+        }
+        var extensions = allSupportedExtensions.slice(0);
+        for (var _i = 0, extraFileExtensions_1 = extraFileExtensions; _i < extraFileExtensions_1.length; _i++) {
+            var extInfo = extraFileExtensions_1[_i];
+            if (extensions.indexOf(extInfo.extension) === -1) {
+                extensions.push(extInfo.extension);
+            }
+        }
+        return extensions;
     }
     ts.getSupportedExtensions = getSupportedExtensions;
     function hasJavaScriptFileExtension(fileName) {
@@ -2731,11 +3323,11 @@ var ts;
         return forEach(ts.supportedTypeScriptExtensions, function (extension) { return fileExtensionIs(fileName, extension); });
     }
     ts.hasTypeScriptFileExtension = hasTypeScriptFileExtension;
-    function isSupportedSourceFileName(fileName, compilerOptions) {
+    function isSupportedSourceFileName(fileName, compilerOptions, extraFileExtensions) {
         if (!fileName) {
             return false;
         }
-        for (var _i = 0, _a = getSupportedExtensions(compilerOptions); _i < _a.length; _i++) {
+        for (var _i = 0, _a = getSupportedExtensions(compilerOptions, extraFileExtensions); _i < _a.length; _i++) {
             var extension = _a[_i];
             if (fileExtensionIs(fileName, extension)) {
                 return true;
@@ -2749,18 +3341,17 @@ var ts;
      * aligned to the offset of the highest priority extension in the
      * allSupportedExtensions array.
      */
+    var ExtensionPriority;
     (function (ExtensionPriority) {
         ExtensionPriority[ExtensionPriority["TypeScriptFiles"] = 0] = "TypeScriptFiles";
         ExtensionPriority[ExtensionPriority["DeclarationAndJavaScriptFiles"] = 2] = "DeclarationAndJavaScriptFiles";
-        ExtensionPriority[ExtensionPriority["Limit"] = 5] = "Limit";
         ExtensionPriority[ExtensionPriority["Highest"] = 0] = "Highest";
         ExtensionPriority[ExtensionPriority["Lowest"] = 2] = "Lowest";
-    })(ts.ExtensionPriority || (ts.ExtensionPriority = {}));
-    var ExtensionPriority = ts.ExtensionPriority;
+    })(ExtensionPriority = ts.ExtensionPriority || (ts.ExtensionPriority = {}));
     function getExtensionPriority(path, supportedExtensions) {
         for (var i = supportedExtensions.length - 1; i >= 0; i--) {
             if (fileExtensionIs(path, supportedExtensions[i])) {
-                return adjustExtensionPriority(i);
+                return adjustExtensionPriority(i, supportedExtensions);
             }
         }
         // If its not in the list of supported extensions, this is likely a
@@ -2771,31 +3362,31 @@ var ts;
     /**
      * Adjusts an extension priority to be the highest priority within the same range.
      */
-    function adjustExtensionPriority(extensionPriority) {
+    function adjustExtensionPriority(extensionPriority, supportedExtensions) {
         if (extensionPriority < 2 /* DeclarationAndJavaScriptFiles */) {
             return 0 /* TypeScriptFiles */;
         }
-        else if (extensionPriority < 5 /* Limit */) {
+        else if (extensionPriority < supportedExtensions.length) {
             return 2 /* DeclarationAndJavaScriptFiles */;
         }
         else {
-            return 5 /* Limit */;
+            return supportedExtensions.length;
         }
     }
     ts.adjustExtensionPriority = adjustExtensionPriority;
     /**
      * Gets the next lowest extension priority for a given priority.
      */
-    function getNextLowestExtensionPriority(extensionPriority) {
+    function getNextLowestExtensionPriority(extensionPriority, supportedExtensions) {
         if (extensionPriority < 2 /* DeclarationAndJavaScriptFiles */) {
             return 2 /* DeclarationAndJavaScriptFiles */;
         }
         else {
-            return 5 /* Limit */;
+            return supportedExtensions.length;
         }
     }
     ts.getNextLowestExtensionPriority = getNextLowestExtensionPriority;
-    var extensionsToRemove = [".d.ts", ".ts", ".js", ".tsx", ".jsx"];
+    var extensionsToRemove = [".d.ts" /* Dts */, ".ts" /* Ts */, ".js" /* Js */, ".tsx" /* Tsx */, ".jsx" /* Jsx */];
     function removeFileExtension(path) {
         for (var _i = 0, extensionsToRemove_1 = extensionsToRemove; _i < extensionsToRemove_1.length; _i++) {
             var ext = extensionsToRemove_1[_i];
@@ -2815,10 +3406,6 @@ var ts;
         return path.substring(0, path.length - extension.length);
     }
     ts.removeExtension = removeExtension;
-    function isJsxOrTsxExtension(ext) {
-        return ext === ".jsx" || ext === ".tsx";
-    }
-    ts.isJsxOrTsxExtension = isJsxOrTsxExtension;
     function changeExtension(path, newExtension) {
         return (removeFileExtension(path) + newExtension);
     }
@@ -2830,8 +3417,11 @@ var ts;
     }
     function Type(checker, flags) {
         this.flags = flags;
+        if (Debug.isDebugging) {
+            this.checker = checker;
+        }
     }
-    function Signature(checker) {
+    function Signature() {
     }
     function Node(kind, pos, end) {
         this.id = 0;
@@ -2844,6 +3434,11 @@ var ts;
         this.parent = undefined;
         this.original = undefined;
     }
+    function SourceMapSource(fileName, text, skipTrivia) {
+        this.fileName = fileName;
+        this.text = text;
+        this.skipTrivia = skipTrivia || (function (pos) { return pos; });
+    }
     ts.objectAllocator = {
         getNodeConstructor: function () { return Node; },
         getTokenConstructor: function () { return Node; },
@@ -2851,62 +3446,69 @@ var ts;
         getSourceFileConstructor: function () { return Node; },
         getSymbolConstructor: function () { return Symbol; },
         getTypeConstructor: function () { return Type; },
-        getSignatureConstructor: function () { return Signature; }
+        getSignatureConstructor: function () { return Signature; },
+        getSourceMapSourceConstructor: function () { return SourceMapSource; },
     };
+    var AssertionLevel;
     (function (AssertionLevel) {
         AssertionLevel[AssertionLevel["None"] = 0] = "None";
         AssertionLevel[AssertionLevel["Normal"] = 1] = "Normal";
         AssertionLevel[AssertionLevel["Aggressive"] = 2] = "Aggressive";
         AssertionLevel[AssertionLevel["VeryAggressive"] = 3] = "VeryAggressive";
-    })(ts.AssertionLevel || (ts.AssertionLevel = {}));
-    var AssertionLevel = ts.AssertionLevel;
+    })(AssertionLevel = ts.AssertionLevel || (ts.AssertionLevel = {}));
     var Debug;
     (function (Debug) {
-        var currentAssertionLevel;
+        Debug.currentAssertionLevel = 0 /* None */;
+        Debug.isDebugging = false;
         function shouldAssert(level) {
-            return getCurrentAssertionLevel() >= level;
+            return Debug.currentAssertionLevel >= level;
         }
         Debug.shouldAssert = shouldAssert;
-        function assert(expression, message, verboseDebugInfo) {
+        function assert(expression, message, verboseDebugInfo, stackCrawlMark) {
             if (!expression) {
-                var verboseDebugString = "";
                 if (verboseDebugInfo) {
-                    verboseDebugString = "\r\nVerbose Debug Information: " + verboseDebugInfo();
+                    message += "\r\nVerbose Debug Information: " + verboseDebugInfo();
                 }
-                debugger;
-                throw new Error("Debug Failure. False expression: " + (message || "") + verboseDebugString);
+                fail(message ? "False expression: " + message : "False expression.", stackCrawlMark || assert);
             }
         }
         Debug.assert = assert;
-        function fail(message) {
-            Debug.assert(/*expression*/ false, message);
+        function fail(message, stackCrawlMark) {
+            debugger;
+            var e = new Error(message ? "Debug Failure. " : "Debug Failure.");
+            if (Error.captureStackTrace) {
+                Error.captureStackTrace(e, stackCrawlMark || fail);
+            }
+            throw e;
         }
         Debug.fail = fail;
-        function getCurrentAssertionLevel() {
-            if (currentAssertionLevel !== undefined) {
-                return currentAssertionLevel;
+        function getFunctionName(func) {
+            if (typeof func !== "function") {
+                return "";
             }
-            if (ts.sys === undefined) {
-                return 0 /* None */;
+            else if (func.hasOwnProperty("name")) {
+                return func.name;
+            }
+            else {
+                var text = Function.prototype.toString.call(func);
+                var match = /^function\s+([\w\$]+)\s*\(/.exec(text);
+                return match ? match[1] : "";
             }
-            var developmentMode = /^development$/i.test(getEnvironmentVariable("NODE_ENV"));
-            currentAssertionLevel = developmentMode
-                ? 1 /* Normal */
-                : 0 /* None */;
-            return currentAssertionLevel;
         }
+        Debug.getFunctionName = getFunctionName;
     })(Debug = ts.Debug || (ts.Debug = {}));
-    function getEnvironmentVariable(name, host) {
-        if (host && host.getEnvironmentVariable) {
-            return host.getEnvironmentVariable(name);
-        }
-        if (ts.sys && ts.sys.getEnvironmentVariable) {
-            return ts.sys.getEnvironmentVariable(name);
+    /** Remove an item from an array, moving everything to its right one space left. */
+    function orderedRemoveItem(array, item) {
+        for (var i = 0; i < array.length; i++) {
+            if (array[i] === item) {
+                orderedRemoveItemAt(array, i);
+                return true;
+            }
         }
-        return "";
+        return false;
     }
-    ts.getEnvironmentVariable = getEnvironmentVariable;
-    /** Remove an item from an array, moving everything to its right one space left. */
+    ts.orderedRemoveItem = orderedRemoveItem;
+    /** Remove an item by index from an array, moving everything to its right one space left. */
     function orderedRemoveItemAt(array, index) {
         // This seems to be faster than either `array.splice(i, 1)` or `array.copyWithin(i, i+ 1)`.
         for (var i = index; i < array.length - 1; i++) {
@@ -3019,144 +3621,51 @@ var ts;
         return !(pos >= 0);
     }
     ts.positionIsSynthesized = positionIsSynthesized;
+    /** True if an extension is one of the supported TypeScript extensions. */
+    function extensionIsTypeScript(ext) {
+        return ext === ".ts" /* Ts */ || ext === ".tsx" /* Tsx */ || ext === ".d.ts" /* Dts */;
+    }
+    ts.extensionIsTypeScript = extensionIsTypeScript;
+    /**
+     * Gets the extension from a path.
+     * Path must have a valid extension.
+     */
+    function extensionFromPath(path) {
+        var ext = tryGetExtensionFromPath(path);
+        if (ext !== undefined) {
+            return ext;
+        }
+        Debug.fail("File " + path + " has unknown extension.");
+    }
+    ts.extensionFromPath = extensionFromPath;
+    function tryGetExtensionFromPath(path) {
+        return find(ts.supportedTypescriptExtensionsForExtractExtension, function (e) { return fileExtensionIs(path, e); }) || find(ts.supportedJavascriptExtensions, function (e) { return fileExtensionIs(path, e); });
+    }
+    ts.tryGetExtensionFromPath = tryGetExtensionFromPath;
+    function isCheckJsEnabledForFile(sourceFile, compilerOptions) {
+        return sourceFile.checkJsDirective ? sourceFile.checkJsDirective.enabled : compilerOptions.checkJs;
+    }
+    ts.isCheckJsEnabledForFile = isCheckJsEnabledForFile;
 })(ts || (ts = {}));
 /// <reference path="core.ts"/>
 var ts;
 (function (ts) {
-    ts.sys = (function () {
-        function getWScriptSystem() {
-            var fso = new ActiveXObject("Scripting.FileSystemObject");
-            var shell = new ActiveXObject("WScript.Shell");
-            var fileStream = new ActiveXObject("ADODB.Stream");
-            fileStream.Type = 2 /*text*/;
-            var binaryStream = new ActiveXObject("ADODB.Stream");
-            binaryStream.Type = 1 /*binary*/;
-            var args = [];
-            for (var i = 0; i < WScript.Arguments.length; i++) {
-                args[i] = WScript.Arguments.Item(i);
-            }
-            function readFile(fileName, encoding) {
-                if (!fso.FileExists(fileName)) {
-                    return undefined;
-                }
-                fileStream.Open();
-                try {
-                    if (encoding) {
-                        fileStream.Charset = encoding;
-                        fileStream.LoadFromFile(fileName);
-                    }
-                    else {
-                        // Load file and read the first two bytes into a string with no interpretation
-                        fileStream.Charset = "x-ansi";
-                        fileStream.LoadFromFile(fileName);
-                        var bom = fileStream.ReadText(2) || "";
-                        // Position must be at 0 before encoding can be changed
-                        fileStream.Position = 0;
-                        // [0xFF,0xFE] and [0xFE,0xFF] mean utf-16 (little or big endian), otherwise default to utf-8
-                        fileStream.Charset = bom.length >= 2 && (bom.charCodeAt(0) === 0xFF && bom.charCodeAt(1) === 0xFE || bom.charCodeAt(0) === 0xFE && bom.charCodeAt(1) === 0xFF) ? "unicode" : "utf-8";
-                    }
-                    // ReadText method always strips byte order mark from resulting string
-                    return fileStream.ReadText();
-                }
-                catch (e) {
-                    throw e;
-                }
-                finally {
-                    fileStream.Close();
-                }
-            }
-            function writeFile(fileName, data, writeByteOrderMark) {
-                fileStream.Open();
-                binaryStream.Open();
-                try {
-                    // Write characters in UTF-8 encoding
-                    fileStream.Charset = "utf-8";
-                    fileStream.WriteText(data);
-                    // If we don't want the BOM, then skip it by setting the starting location to 3 (size of BOM).
-                    // If not, start from position 0, as the BOM will be added automatically when charset==utf8.
-                    if (writeByteOrderMark) {
-                        fileStream.Position = 0;
-                    }
-                    else {
-                        fileStream.Position = 3;
-                    }
-                    fileStream.CopyTo(binaryStream);
-                    binaryStream.SaveToFile(fileName, 2 /*overwrite*/);
-                }
-                finally {
-                    binaryStream.Close();
-                    fileStream.Close();
-                }
-            }
-            function getNames(collection) {
-                var result = [];
-                for (var e = new Enumerator(collection); !e.atEnd(); e.moveNext()) {
-                    result.push(e.item().Name);
-                }
-                return result.sort();
-            }
-            function getDirectories(path) {
-                var folder = fso.GetFolder(path);
-                return getNames(folder.subfolders);
-            }
-            function getAccessibleFileSystemEntries(path) {
-                try {
-                    var folder = fso.GetFolder(path || ".");
-                    var files = getNames(folder.files);
-                    var directories = getNames(folder.subfolders);
-                    return { files: files, directories: directories };
-                }
-                catch (e) {
-                    return { files: [], directories: [] };
-                }
-            }
-            function readDirectory(path, extensions, excludes, includes) {
-                return ts.matchFiles(path, extensions, excludes, includes, /*useCaseSensitiveFileNames*/ false, shell.CurrentDirectory, getAccessibleFileSystemEntries);
-            }
-            var wscriptSystem = {
-                args: args,
-                newLine: "\r\n",
-                useCaseSensitiveFileNames: false,
-                write: function (s) {
-                    WScript.StdOut.Write(s);
-                },
-                readFile: readFile,
-                writeFile: writeFile,
-                resolvePath: function (path) {
-                    return fso.GetAbsolutePathName(path);
-                },
-                fileExists: function (path) {
-                    return fso.FileExists(path);
-                },
-                directoryExists: function (path) {
-                    return fso.FolderExists(path);
-                },
-                createDirectory: function (directoryName) {
-                    if (!wscriptSystem.directoryExists(directoryName)) {
-                        fso.CreateFolder(directoryName);
-                    }
-                },
-                getExecutingFilePath: function () {
-                    return WScript.ScriptFullName;
-                },
-                getCurrentDirectory: function () {
-                    return shell.CurrentDirectory;
-                },
-                getDirectories: getDirectories,
-                getEnvironmentVariable: function (name) {
-                    return new ActiveXObject("WScript.Shell").ExpandEnvironmentStrings("%" + name + "%");
-                },
-                readDirectory: readDirectory,
-                exit: function (exitCode) {
-                    try {
-                        WScript.Quit(exitCode);
-                    }
-                    catch (e) {
-                    }
-                }
-            };
-            return wscriptSystem;
+    function getNodeMajorVersion() {
+        if (typeof process === "undefined") {
+            return undefined;
         }
+        var version = process.version;
+        if (!version) {
+            return undefined;
+        }
+        var dot = version.indexOf(".");
+        if (dot === -1) {
+            return undefined;
+        }
+        return parseInt(version.substring(1, dot));
+    }
+    ts.getNodeMajorVersion = getNodeMajorVersion;
+    ts.sys = (function () {
         function getNodeSystem() {
             var _fs = require("fs");
             var _path = require("path");
@@ -3166,32 +3675,32 @@ var ts;
             function createWatchedFileSet() {
                 var dirWatchers = ts.createMap();
                 // One file can have multiple watchers
-                var fileWatcherCallbacks = ts.createMap();
+                var fileWatcherCallbacks = ts.createMultiMap();
                 return { addFile: addFile, removeFile: removeFile };
                 function reduceDirWatcherRefCountForFile(fileName) {
                     var dirName = ts.getDirectoryPath(fileName);
-                    var watcher = dirWatchers[dirName];
+                    var watcher = dirWatchers.get(dirName);
                     if (watcher) {
                         watcher.referenceCount -= 1;
                         if (watcher.referenceCount <= 0) {
                             watcher.close();
-                            delete dirWatchers[dirName];
+                            dirWatchers.delete(dirName);
                         }
                     }
                 }
                 function addDirWatcher(dirPath) {
-                    var watcher = dirWatchers[dirPath];
+                    var watcher = dirWatchers.get(dirPath);
                     if (watcher) {
                         watcher.referenceCount += 1;
                         return;
                     }
                     watcher = _fs.watch(dirPath, { persistent: true }, function (eventName, relativeFileName) { return fileEventHandler(eventName, relativeFileName, dirPath); });
                     watcher.referenceCount = 1;
-                    dirWatchers[dirPath] = watcher;
+                    dirWatchers.set(dirPath, watcher);
                     return;
                 }
                 function addFileWatcherCallback(filePath, callback) {
-                    ts.multiMapAdd(fileWatcherCallbacks, filePath, callback);
+                    fileWatcherCallbacks.add(filePath, callback);
                 }
                 function addFile(fileName, callback) {
                     addFileWatcherCallback(fileName, callback);
@@ -3203,7 +3712,7 @@ var ts;
                     reduceDirWatcherRefCountForFile(watchedFile.fileName);
                 }
                 function removeFileWatcherCallback(filePath, callback) {
-                    ts.multiMapRemove(fileWatcherCallbacks, filePath, callback);
+                    fileWatcherCallbacks.remove(filePath, callback);
                 }
                 function fileEventHandler(eventName, relativeFileName, baseDirPath) {
                     // When files are deleted from disk, the triggered "rename" event would have a relativefileName of "undefined"
@@ -3211,22 +3720,32 @@ var ts;
                         ? undefined
                         : ts.getNormalizedAbsolutePath(relativeFileName, baseDirPath);
                     // Some applications save a working file via rename operations
-                    if ((eventName === "change" || eventName === "rename") && fileWatcherCallbacks[fileName]) {
-                        for (var _i = 0, _a = fileWatcherCallbacks[fileName]; _i < _a.length; _i++) {
-                            var fileCallback = _a[_i];
-                            fileCallback(fileName);
+                    if ((eventName === "change" || eventName === "rename")) {
+                        var callbacks = fileWatcherCallbacks.get(fileName);
+                        if (callbacks) {
+                            for (var _i = 0, callbacks_1 = callbacks; _i < callbacks_1.length; _i++) {
+                                var fileCallback = callbacks_1[_i];
+                                fileCallback(fileName);
+                            }
                         }
                     }
                 }
             }
             var watchedFileSet = createWatchedFileSet();
-            function isNode4OrLater() {
-                return parseInt(process.version.charAt(1)) >= 4;
+            var nodeVersion = getNodeMajorVersion();
+            var isNode4OrLater = nodeVersion >= 4;
+            function isFileSystemCaseSensitive() {
+                // win32\win64 are case insensitive platforms
+                if (platform === "win32" || platform === "win64") {
+                    return false;
+                }
+                // convert current file name to upper case / lower case and check if file exists
+                // (guards against cases when name is already all uppercase or lowercase)
+                return !fileExists(__filename.toUpperCase()) || !fileExists(__filename.toLowerCase());
             }
             var platform = _os.platform();
-            // win32\win64 are case insensitive platforms, MacOS (darwin) by default is also case insensitive
-            var useCaseSensitiveFileNames = platform !== "win32" && platform !== "win64" && platform !== "darwin";
-            function readFile(fileName, encoding) {
+            var useCaseSensitiveFileNames = isFileSystemCaseSensitive();
+            function readFile(fileName, _encoding) {
                 if (!fileExists(fileName)) {
                     return undefined;
                 }
@@ -3235,7 +3754,7 @@ var ts;
                 if (len >= 2 && buffer[0] === 0xFE && buffer[1] === 0xFF) {
                     // Big endian UTF-16 byte order mark detected. Since big endian is not supported by node.js,
                     // flip all byte pairs and treat as little endian.
-                    len &= ~1;
+                    len &= ~1; // Round down to a multiple of 2
                     for (var i = 0; i < len; i += 2) {
                         var temp = buffer[i];
                         buffer[i] = buffer[i + 1];
@@ -3262,7 +3781,7 @@ var ts;
                 var fd;
                 try {
                     fd = _fs.openSync(fileName, "w");
-                    _fs.writeSync(fd, data, undefined, "utf8");
+                    _fs.writeSync(fd, data, /*position*/ undefined, "utf8");
                 }
                 finally {
                     if (fd !== undefined) {
@@ -3332,6 +3851,7 @@ var ts;
             function getDirectories(path) {
                 return ts.filter(_fs.readdirSync(path), function (dir) { return fileSystemEntryExists(ts.combinePaths(path, dir), 1 /* Directory */); });
             }
+            var noOpFileWatcher = { close: ts.noop };
             var nodeSystem = {
                 args: process.argv.slice(2),
                 newLine: _os.EOL,
@@ -3341,7 +3861,7 @@ var ts;
                 },
                 readFile: readFile,
                 writeFile: writeFile,
-                watchFile: function (fileName, callback) {
+                watchFile: function (fileName, callback, pollingInterval) {
                     if (useNonPollingWatchers) {
                         var watchedFile_1 = watchedFileSet.addFile(fileName, callback);
                         return {
@@ -3349,7 +3869,7 @@ var ts;
                         };
                     }
                     else {
-                        _fs.watchFile(fileName, { persistent: true, interval: 250 }, fileChanged);
+                        _fs.watchFile(fileName, { persistent: true, interval: pollingInterval || 250 }, fileChanged);
                         return {
                             close: function () { return _fs.unwatchFile(fileName, fileChanged); }
                         };
@@ -3365,7 +3885,11 @@ var ts;
                     // Node 4.0 `fs.watch` function supports the "recursive" option on both OSX and Windows
                     // (ref: https://github.com/nodejs/node/pull/2649 and https://github.com/Microsoft/TypeScript/issues/4643)
                     var options;
-                    if (isNode4OrLater() && (process.platform === "win32" || process.platform === "darwin")) {
+                    if (!directoryExists(directoryName)) {
+                        // do nothing if target folder does not exist
+                        return noOpFileWatcher;
+                    }
+                    if (isNode4OrLater && (process.platform === "win32" || process.platform === "darwin")) {
                         options = { persistent: true, recursive: !!recursive };
                     }
                     else {
@@ -3379,7 +3903,6 @@ var ts;
                             // When deleting a file, the passed baseFileName is null
                             callback(!relativeFileName ? relativeFileName : ts.normalizePath(ts.combinePaths(directoryName, relativeFileName)));
                         }
-                        ;
                     });
                 },
                 resolvePath: function (path) {
@@ -3438,13 +3961,17 @@ var ts;
                 realpath: function (path) {
                     return _fs.realpathSync(path);
                 },
+                debugMode: ts.some(process.execArgv, function (arg) { return /^--(inspect|debug)(-brk)?(=\d+)?$/i.test(arg); }),
                 tryEnableSourceMapsForHost: function () {
                     try {
                         require("source-map-support").install();
                     }
                     catch (e) {
+                        // Could not enable source maps.
                     }
-                }
+                },
+                setTimeout: setTimeout,
+                clearTimeout: clearTimeout
             };
             return nodeSystem;
         }
@@ -3455,7 +3982,7 @@ var ts;
                 args: ChakraHost.args,
                 useCaseSensitiveFileNames: !!ChakraHost.useCaseSensitiveFileNames,
                 write: ChakraHost.echo,
-                readFile: function (path, encoding) {
+                readFile: function (path, _encoding) {
                     // encoding is automatically handled by the implementation in ChakraHost
                     return ChakraHost.readFile(path);
                 },
@@ -3473,9 +4000,9 @@ var ts;
                 getExecutingFilePath: function () { return ChakraHost.executingFile; },
                 getCurrentDirectory: function () { return ChakraHost.currentDirectory; },
                 getDirectories: ChakraHost.getDirectories,
-                getEnvironmentVariable: ChakraHost.getEnvironmentVariable || (function (name) { return ""; }),
+                getEnvironmentVariable: ChakraHost.getEnvironmentVariable || (function () { return ""; }),
                 readDirectory: function (path, extensions, excludes, includes) {
-                    var pattern = ts.getFileMatcherPatterns(path, extensions, excludes, includes, !!ChakraHost.useCaseSensitiveFileNames, ChakraHost.currentDirectory);
+                    var pattern = ts.getFileMatcherPatterns(path, excludes, includes, !!ChakraHost.useCaseSensitiveFileNames, ChakraHost.currentDirectory);
                     return ChakraHost.readDirectory(path, extensions, pattern.basePaths, pattern.excludePattern, pattern.includeFilePattern, pattern.includeDirectoryPattern);
                 },
                 exit: ChakraHost.quit,
@@ -3496,9 +4023,6 @@ var ts;
         if (typeof ChakraHost !== "undefined") {
             sys = getChakraSystem();
         }
-        else if (typeof WScript !== "undefined" && typeof ActiveXObject === "function") {
-            sys = getWScriptSystem();
-        }
         else if (typeof process !== "undefined" && process.nextTick && !process.browser && typeof require !== "undefined") {
             // process and process.nextTick checks if current environment is node-like
             // process.browser check excludes webpack and browserify
@@ -3517,6 +4041,14 @@ var ts;
         }
         return sys;
     })();
+    if (ts.sys && ts.sys.getEnvironmentVariable) {
+        ts.Debug.currentAssertionLevel = /^development$/i.test(ts.sys.getEnvironmentVariable("NODE_ENV"))
+            ? 1 /* Normal */
+            : 0 /* None */;
+    }
+    if (ts.sys && ts.sys.debugMode) {
+        ts.Debug.isDebugging = true;
+    }
 })(ts || (ts = {}));
 /// <reference path="sys.ts" />
 /* @internal */
@@ -3536,6 +4068,19 @@ var ts;
         return undefined;
     }
     ts.getDeclarationOfKind = getDeclarationOfKind;
+    function findDeclaration(symbol, predicate) {
+        var declarations = symbol.declarations;
+        if (declarations) {
+            for (var _i = 0, declarations_2 = declarations; _i < declarations_2.length; _i++) {
+                var declaration = declarations_2[_i];
+                if (predicate(declaration)) {
+                    return declaration;
+                }
+            }
+        }
+        return undefined;
+    }
+    ts.findDeclaration = findDeclaration;
     // Pool writers to avoid needing to allocate them for every symbol we write.
     var stringWriters = [];
     function getSingleLineStringWriter() {
@@ -3550,15 +4095,17 @@ var ts;
                 writeSpace: writeText,
                 writeStringLiteral: writeText,
                 writeParameter: writeText,
+                writeProperty: writeText,
                 writeSymbol: writeText,
                 // Completely ignore indentation for string writers.  And map newlines to
                 // a single space.
                 writeLine: function () { return str_1 += " "; },
-                increaseIndent: function () { },
-                decreaseIndent: function () { },
+                increaseIndent: ts.noop,
+                decreaseIndent: ts.noop,
                 clear: function () { return str_1 = ""; },
-                trackSymbol: function () { },
-                reportInaccessibleThisError: function () { }
+                trackSymbol: ts.noop,
+                reportInaccessibleThisError: ts.noop,
+                reportPrivateInBaseOfClassExpression: ts.noop,
             };
         }
         return stringWriters.pop();
@@ -3573,47 +4120,33 @@ var ts;
         return node.end - node.pos;
     }
     ts.getFullWidth = getFullWidth;
-    function arrayIsEqualTo(array1, array2, equaler) {
-        if (!array1 || !array2) {
-            return array1 === array2;
-        }
-        if (array1.length !== array2.length) {
-            return false;
-        }
-        for (var i = 0; i < array1.length; i++) {
-            var equals = equaler ? equaler(array1[i], array2[i]) : array1[i] === array2[i];
-            if (!equals) {
-                return false;
-            }
-        }
-        return true;
-    }
-    ts.arrayIsEqualTo = arrayIsEqualTo;
     function hasResolvedModule(sourceFile, moduleNameText) {
-        return !!(sourceFile && sourceFile.resolvedModules && sourceFile.resolvedModules[moduleNameText]);
+        return !!(sourceFile && sourceFile.resolvedModules && sourceFile.resolvedModules.get(moduleNameText));
     }
     ts.hasResolvedModule = hasResolvedModule;
     function getResolvedModule(sourceFile, moduleNameText) {
-        return hasResolvedModule(sourceFile, moduleNameText) ? sourceFile.resolvedModules[moduleNameText] : undefined;
+        return hasResolvedModule(sourceFile, moduleNameText) ? sourceFile.resolvedModules.get(moduleNameText) : undefined;
     }
     ts.getResolvedModule = getResolvedModule;
     function setResolvedModule(sourceFile, moduleNameText, resolvedModule) {
         if (!sourceFile.resolvedModules) {
             sourceFile.resolvedModules = ts.createMap();
         }
-        sourceFile.resolvedModules[moduleNameText] = resolvedModule;
+        sourceFile.resolvedModules.set(moduleNameText, resolvedModule);
     }
     ts.setResolvedModule = setResolvedModule;
     function setResolvedTypeReferenceDirective(sourceFile, typeReferenceDirectiveName, resolvedTypeReferenceDirective) {
         if (!sourceFile.resolvedTypeReferenceDirectiveNames) {
             sourceFile.resolvedTypeReferenceDirectiveNames = ts.createMap();
         }
-        sourceFile.resolvedTypeReferenceDirectiveNames[typeReferenceDirectiveName] = resolvedTypeReferenceDirective;
+        sourceFile.resolvedTypeReferenceDirectiveNames.set(typeReferenceDirectiveName, resolvedTypeReferenceDirective);
     }
     ts.setResolvedTypeReferenceDirective = setResolvedTypeReferenceDirective;
     /* @internal */
     function moduleResolutionIsEqualTo(oldResolution, newResolution) {
-        return oldResolution.resolvedFileName === newResolution.resolvedFileName && oldResolution.isExternalLibraryImport === newResolution.isExternalLibraryImport;
+        return oldResolution.isExternalLibraryImport === newResolution.isExternalLibraryImport &&
+            oldResolution.extension === newResolution.extension &&
+            oldResolution.resolvedFileName === newResolution.resolvedFileName;
     }
     ts.moduleResolutionIsEqualTo = moduleResolutionIsEqualTo;
     /* @internal */
@@ -3623,12 +4156,10 @@ var ts;
     ts.typeDirectiveIsEqualTo = typeDirectiveIsEqualTo;
     /* @internal */
     function hasChangesInResolutions(names, newResolutions, oldResolutions, comparer) {
-        if (names.length !== newResolutions.length) {
-            return false;
-        }
+        ts.Debug.assert(names.length === newResolutions.length);
         for (var i = 0; i < names.length; i++) {
             var newResolution = newResolutions[i];
-            var oldResolution = oldResolutions && oldResolutions[names[i]];
+            var oldResolution = oldResolutions && oldResolutions.get(names[i]);
             var changed = oldResolution
                 ? !newResolution || !comparer(oldResolution, newResolution)
                 : newResolution;
@@ -3642,28 +4173,28 @@ var ts;
     // Returns true if this node contains a parse error anywhere underneath it.
     function containsParseError(node) {
         aggregateChildData(node);
-        return (node.flags & 2097152 /* ThisNodeOrAnySubNodesHasError */) !== 0;
+        return (node.flags & 131072 /* ThisNodeOrAnySubNodesHasError */) !== 0;
     }
     ts.containsParseError = containsParseError;
     function aggregateChildData(node) {
-        if (!(node.flags & 4194304 /* HasAggregatedChildData */)) {
+        if (!(node.flags & 262144 /* HasAggregatedChildData */)) {
             // A node is considered to contain a parse error if:
             //  a) the parser explicitly marked that it had an error
             //  b) any of it's children reported that it had an error.
-            var thisNodeOrAnySubNodesHasError = ((node.flags & 524288 /* ThisNodeHasError */) !== 0) ||
+            var thisNodeOrAnySubNodesHasError = ((node.flags & 32768 /* ThisNodeHasError */) !== 0) ||
                 ts.forEachChild(node, containsParseError);
             // If so, mark ourselves accordingly.
             if (thisNodeOrAnySubNodesHasError) {
-                node.flags |= 2097152 /* ThisNodeOrAnySubNodesHasError */;
+                node.flags |= 131072 /* ThisNodeOrAnySubNodesHasError */;
             }
             // Also mark that we've propagated the child information to this node.  This way we can
             // always consult the bit directly on this node without needing to check its children
             // again.
-            node.flags |= 4194304 /* HasAggregatedChildData */;
+            node.flags |= 262144 /* HasAggregatedChildData */;
         }
     }
     function getSourceFileOfNode(node) {
-        while (node && node.kind !== 256 /* SourceFile */) {
+        while (node && node.kind !== 265 /* SourceFile */) {
             node = node.parent;
         }
         return node;
@@ -3671,11 +4202,11 @@ var ts;
     ts.getSourceFileOfNode = getSourceFileOfNode;
     function isStatementWithLocals(node) {
         switch (node.kind) {
-            case 199 /* Block */:
-            case 227 /* CaseBlock */:
-            case 206 /* ForStatement */:
-            case 207 /* ForInStatement */:
-            case 208 /* ForOfStatement */:
+            case 207 /* Block */:
+            case 235 /* CaseBlock */:
+            case 214 /* ForStatement */:
+            case 215 /* ForInStatement */:
+            case 216 /* ForOfStatement */:
                 return true;
         }
         return false;
@@ -3750,36 +4281,28 @@ var ts;
         return !nodeIsMissing(node);
     }
     ts.nodeIsPresent = nodeIsPresent;
-    function getTokenPosOfNode(node, sourceFile, includeJsDocComment) {
+    function getTokenPosOfNode(node, sourceFile, includeJsDoc) {
         // With nodes that have no width (i.e. 'Missing' nodes), we actually *don't*
         // want to skip trivia because this will launch us forward to the next token.
         if (nodeIsMissing(node)) {
             return node.pos;
         }
-        if (isJSDocNode(node)) {
+        if (ts.isJSDocNode(node)) {
             return ts.skipTrivia((sourceFile || getSourceFileOfNode(node)).text, node.pos, /*stopAfterLineBreak*/ false, /*stopAtComments*/ true);
         }
-        if (includeJsDocComment && node.jsDocComments && node.jsDocComments.length > 0) {
-            return getTokenPosOfNode(node.jsDocComments[0]);
+        if (includeJsDoc && node.jsDoc && node.jsDoc.length > 0) {
+            return getTokenPosOfNode(node.jsDoc[0]);
         }
         // For a syntax list, it is possible that one of its children has JSDocComment nodes, while
         // the syntax list itself considers them as normal trivia. Therefore if we simply skip
         // trivia for the list, we may have skipped the JSDocComment as well. So we should process its
         // first child to determine the actual position of its first token.
-        if (node.kind === 286 /* SyntaxList */ && node._children.length > 0) {
-            return getTokenPosOfNode(node._children[0], sourceFile, includeJsDocComment);
+        if (node.kind === 295 /* SyntaxList */ && node._children.length > 0) {
+            return getTokenPosOfNode(node._children[0], sourceFile, includeJsDoc);
         }
         return ts.skipTrivia((sourceFile || getSourceFileOfNode(node)).text, node.pos);
     }
     ts.getTokenPosOfNode = getTokenPosOfNode;
-    function isJSDocNode(node) {
-        return node.kind >= 257 /* FirstJSDocNode */ && node.kind <= 282 /* LastJSDocNode */;
-    }
-    ts.isJSDocNode = isJSDocNode;
-    function isJSDocTag(node) {
-        return node.kind >= 273 /* FirstJSDocTagNode */ && node.kind <= 285 /* LastJSDocTagNode */;
-    }
-    ts.isJSDocTag = isJSDocTag;
     function getNonDecoratorTokenPosOfNode(node, sourceFile) {
         if (nodeIsMissing(node) || !node.decorators) {
             return getTokenPosOfNode(node, sourceFile);
@@ -3808,66 +4331,49 @@ var ts;
         return getSourceTextOfNodeFromSourceFile(getSourceFileOfNode(node), node, includeTrivia);
     }
     ts.getTextOfNode = getTextOfNode;
-    function getLiteralText(node, sourceFile, languageVersion) {
-        // Any template literal or string literal with an extended escape
-        // (e.g. "\u{0067}") will need to be downleveled as a escaped string literal.
-        if (languageVersion < 2 /* ES6 */ && (isTemplateLiteralKind(node.kind) || node.hasExtendedUnicodeEscape)) {
-            return getQuotedEscapedLiteralText('"', node.text, '"');
-        }
+    /**
+     * Gets flags that control emit behavior of a node.
+     */
+    function getEmitFlags(node) {
+        var emitNode = node.emitNode;
+        return emitNode && emitNode.flags;
+    }
+    ts.getEmitFlags = getEmitFlags;
+    function getLiteralText(node, sourceFile) {
         // If we don't need to downlevel and we can reach the original source text using
         // the node's parent reference, then simply get the text as it was originally written.
         if (!nodeIsSynthesized(node) && node.parent) {
-            var text = getSourceTextOfNodeFromSourceFile(sourceFile, node);
-            if (languageVersion < 2 /* ES6 */ && isBinaryOrOctalIntegerLiteral(node, text)) {
-                return node.text;
-            }
-            return text;
+            return getSourceTextOfNodeFromSourceFile(sourceFile, node);
         }
+        var escapeText = getEmitFlags(node) & 16777216 /* NoAsciiEscaping */ ? escapeString : escapeNonAsciiString;
         // If we can't reach the original source text, use the canonical form if it's a number,
-        // or an escaped quoted form of the original text if it's string-like.
+        // or a (possibly escaped) quoted form of the original text if it's string-like.
         switch (node.kind) {
             case 9 /* StringLiteral */:
-                return getQuotedEscapedLiteralText('"', node.text, '"');
-            case 11 /* NoSubstitutionTemplateLiteral */:
-                return getQuotedEscapedLiteralText("`", node.text, "`");
-            case 12 /* TemplateHead */:
-                return getQuotedEscapedLiteralText("`", node.text, "${");
-            case 13 /* TemplateMiddle */:
-                return getQuotedEscapedLiteralText("}", node.text, "${");
-            case 14 /* TemplateTail */:
-                return getQuotedEscapedLiteralText("}", node.text, "`");
+                return '"' + escapeText(node.text) + '"';
+            case 13 /* NoSubstitutionTemplateLiteral */:
+                return "`" + escapeText(node.text) + "`";
+            case 14 /* TemplateHead */:
+                return "`" + escapeText(node.text) + "${";
+            case 15 /* TemplateMiddle */:
+                return "}" + escapeText(node.text) + "${";
+            case 16 /* TemplateTail */:
+                return "}" + escapeText(node.text) + "`";
             case 8 /* NumericLiteral */:
                 return node.text;
         }
         ts.Debug.fail("Literal kind '" + node.kind + "' not accounted for.");
     }
     ts.getLiteralText = getLiteralText;
-    function isBinaryOrOctalIntegerLiteral(node, text) {
-        if (node.kind === 8 /* NumericLiteral */ && text.length > 1) {
-            switch (text.charCodeAt(1)) {
-                case 98 /* b */:
-                case 66 /* B */:
-                case 111 /* o */:
-                case 79 /* O */:
-                    return true;
-            }
-        }
-        return false;
-    }
-    ts.isBinaryOrOctalIntegerLiteral = isBinaryOrOctalIntegerLiteral;
-    function getQuotedEscapedLiteralText(leftQuote, text, rightQuote) {
-        return leftQuote + escapeNonAsciiCharacters(escapeString(text)) + rightQuote;
+    function getTextOfConstantValue(value) {
+        return typeof value === "string" ? '"' + escapeNonAsciiString(value) + '"' : "" + value;
     }
+    ts.getTextOfConstantValue = getTextOfConstantValue;
     // Add an extra underscore to identifiers that start with two underscores to avoid issues with magic names like '__proto__'
     function escapeIdentifier(identifier) {
         return identifier.length >= 2 && identifier.charCodeAt(0) === 95 /* _ */ && identifier.charCodeAt(1) === 95 /* _ */ ? "_" + identifier : identifier;
     }
     ts.escapeIdentifier = escapeIdentifier;
-    // Remove extra underscore from escaped identifier
-    function unescapeIdentifier(identifier) {
-        return identifier.length >= 3 && identifier.charCodeAt(0) === 95 /* _ */ && identifier.charCodeAt(1) === 95 /* _ */ && identifier.charCodeAt(2) === 95 /* _ */ ? identifier.substr(1) : identifier;
-    }
-    ts.unescapeIdentifier = unescapeIdentifier;
     // Make an identifier from an external module name by extracting the string after the last "/" and replacing
     // all non-alphanumeric characters with underscores
     function makeIdentifierFromModuleName(moduleName) {
@@ -3876,26 +4382,32 @@ var ts;
     ts.makeIdentifierFromModuleName = makeIdentifierFromModuleName;
     function isBlockOrCatchScoped(declaration) {
         return (ts.getCombinedNodeFlags(declaration) & 3 /* BlockScoped */) !== 0 ||
-            isCatchClauseVariableDeclaration(declaration);
+            isCatchClauseVariableDeclarationOrBindingElement(declaration);
     }
     ts.isBlockOrCatchScoped = isBlockOrCatchScoped;
+    function isCatchClauseVariableDeclarationOrBindingElement(declaration) {
+        var node = getRootDeclaration(declaration);
+        return node.kind === 226 /* VariableDeclaration */ && node.parent.kind === 260 /* CatchClause */;
+    }
+    ts.isCatchClauseVariableDeclarationOrBindingElement = isCatchClauseVariableDeclarationOrBindingElement;
     function isAmbientModule(node) {
-        return node && node.kind === 225 /* ModuleDeclaration */ &&
+        return node && node.kind === 233 /* ModuleDeclaration */ &&
             (node.name.kind === 9 /* StringLiteral */ || isGlobalScopeAugmentation(node));
     }
     ts.isAmbientModule = isAmbientModule;
+    /** Given a symbol for a module, checks that it is a shorthand ambient module. */
     function isShorthandAmbientModuleSymbol(moduleSymbol) {
         return isShorthandAmbientModule(moduleSymbol.valueDeclaration);
     }
     ts.isShorthandAmbientModuleSymbol = isShorthandAmbientModuleSymbol;
     function isShorthandAmbientModule(node) {
         // The only kind of module that can be missing a body is a shorthand ambient module.
-        return node.kind === 225 /* ModuleDeclaration */ && (!node.body);
+        return node && node.kind === 233 /* ModuleDeclaration */ && (!node.body);
     }
     function isBlockScopedContainerTopLevel(node) {
-        return node.kind === 256 /* SourceFile */ ||
-            node.kind === 225 /* ModuleDeclaration */ ||
-            isFunctionLike(node);
+        return node.kind === 265 /* SourceFile */ ||
+            node.kind === 233 /* ModuleDeclaration */ ||
+            ts.isFunctionLike(node);
     }
     ts.isBlockScopedContainerTopLevel = isBlockScopedContainerTopLevel;
     function isGlobalScopeAugmentation(module) {
@@ -3910,35 +4422,39 @@ var ts;
             return false;
         }
         switch (node.parent.kind) {
-            case 256 /* SourceFile */:
+            case 265 /* SourceFile */:
                 return ts.isExternalModule(node.parent);
-            case 226 /* ModuleBlock */:
+            case 234 /* ModuleBlock */:
                 return isAmbientModule(node.parent.parent) && !ts.isExternalModule(node.parent.parent.parent);
         }
         return false;
     }
     ts.isExternalModuleAugmentation = isExternalModuleAugmentation;
+    function isEffectiveExternalModule(node, compilerOptions) {
+        return ts.isExternalModule(node) || compilerOptions.isolatedModules;
+    }
+    ts.isEffectiveExternalModule = isEffectiveExternalModule;
     function isBlockScope(node, parentNode) {
         switch (node.kind) {
-            case 256 /* SourceFile */:
-            case 227 /* CaseBlock */:
-            case 252 /* CatchClause */:
-            case 225 /* ModuleDeclaration */:
-            case 206 /* ForStatement */:
-            case 207 /* ForInStatement */:
-            case 208 /* ForOfStatement */:
-            case 148 /* Constructor */:
-            case 147 /* MethodDeclaration */:
-            case 149 /* GetAccessor */:
-            case 150 /* SetAccessor */:
-            case 220 /* FunctionDeclaration */:
-            case 179 /* FunctionExpression */:
-            case 180 /* ArrowFunction */:
+            case 265 /* SourceFile */:
+            case 235 /* CaseBlock */:
+            case 260 /* CatchClause */:
+            case 233 /* ModuleDeclaration */:
+            case 214 /* ForStatement */:
+            case 215 /* ForInStatement */:
+            case 216 /* ForOfStatement */:
+            case 152 /* Constructor */:
+            case 151 /* MethodDeclaration */:
+            case 153 /* GetAccessor */:
+            case 154 /* SetAccessor */:
+            case 228 /* FunctionDeclaration */:
+            case 186 /* FunctionExpression */:
+            case 187 /* ArrowFunction */:
                 return true;
-            case 199 /* Block */:
+            case 207 /* Block */:
                 // function block is not considered block-scope container
                 // see comment in binder.ts: bind(...), case for SyntaxKind.Block
-                return parentNode && !isFunctionLike(parentNode);
+                return parentNode && !ts.isFunctionLike(parentNode);
         }
         return false;
     }
@@ -3955,13 +4471,6 @@ var ts;
         }
     }
     ts.getEnclosingBlockScopeContainer = getEnclosingBlockScopeContainer;
-    function isCatchClauseVariableDeclaration(declaration) {
-        return declaration &&
-            declaration.kind === 218 /* VariableDeclaration */ &&
-            declaration.parent &&
-            declaration.parent.kind === 252 /* CatchClause */;
-    }
-    ts.isCatchClauseVariableDeclaration = isCatchClauseVariableDeclaration;
     // Return display name of an identifier
     // Computed property names will just be emitted as "[<expr>]", where <expr> is the source
     // text of the expression in the computed property.
@@ -3969,12 +4478,46 @@ var ts;
         return getFullWidth(name) === 0 ? "(Missing)" : getTextOfNode(name);
     }
     ts.declarationNameToString = declarationNameToString;
+    function getNameFromIndexInfo(info) {
+        return info.declaration ? declarationNameToString(info.declaration.parameters[0].name) : undefined;
+    }
+    ts.getNameFromIndexInfo = getNameFromIndexInfo;
+    function getTextOfPropertyName(name) {
+        switch (name.kind) {
+            case 71 /* Identifier */:
+                return name.text;
+            case 9 /* StringLiteral */:
+            case 8 /* NumericLiteral */:
+                return name.text;
+            case 144 /* ComputedPropertyName */:
+                if (isStringOrNumericLiteral(name.expression)) {
+                    return name.expression.text;
+                }
+        }
+        return undefined;
+    }
+    ts.getTextOfPropertyName = getTextOfPropertyName;
+    function entityNameToString(name) {
+        switch (name.kind) {
+            case 71 /* Identifier */:
+                return getFullWidth(name) === 0 ? ts.unescapeIdentifier(name.text) : getTextOfNode(name);
+            case 143 /* QualifiedName */:
+                return entityNameToString(name.left) + "." + entityNameToString(name.right);
+            case 179 /* PropertyAccessExpression */:
+                return entityNameToString(name.expression) + "." + entityNameToString(name.name);
+        }
+    }
+    ts.entityNameToString = entityNameToString;
     function createDiagnosticForNode(node, message, arg0, arg1, arg2) {
         var sourceFile = getSourceFileOfNode(node);
+        return createDiagnosticForNodeInSourceFile(sourceFile, node, message, arg0, arg1, arg2);
+    }
+    ts.createDiagnosticForNode = createDiagnosticForNode;
+    function createDiagnosticForNodeInSourceFile(sourceFile, node, message, arg0, arg1, arg2) {
         var span = getErrorSpanForNode(sourceFile, node);
         return ts.createFileDiagnostic(sourceFile, span.start, span.length, message, arg0, arg1, arg2);
     }
-    ts.createDiagnosticForNode = createDiagnosticForNode;
+    ts.createDiagnosticForNodeInSourceFile = createDiagnosticForNodeInSourceFile;
     function createDiagnosticForNodeFromMessageChain(node, messageChain) {
         var sourceFile = getSourceFileOfNode(node);
         var span = getErrorSpanForNode(sourceFile, node);
@@ -3997,7 +4540,7 @@ var ts;
     ts.getSpanOfTokenAtPosition = getSpanOfTokenAtPosition;
     function getErrorSpanForArrowFunction(sourceFile, node) {
         var pos = ts.skipTrivia(sourceFile.text, node.pos);
-        if (node.body && node.body.kind === 199 /* Block */) {
+        if (node.body && node.body.kind === 207 /* Block */) {
             var startLine = ts.getLineAndCharacterOfPosition(sourceFile, node.body.pos).line;
             var endLine = ts.getLineAndCharacterOfPosition(sourceFile, node.body.end).line;
             if (startLine < endLine) {
@@ -4011,7 +4554,7 @@ var ts;
     function getErrorSpanForNode(sourceFile, node) {
         var errorNode = node;
         switch (node.kind) {
-            case 256 /* SourceFile */:
+            case 265 /* SourceFile */:
                 var pos_1 = ts.skipTrivia(sourceFile.text, 0, /*stopAfterLineBreak*/ false);
                 if (pos_1 === sourceFile.text.length) {
                     // file is empty - return span for the beginning of the file
@@ -4020,23 +4563,23 @@ var ts;
                 return getSpanOfTokenAtPosition(sourceFile, pos_1);
             // This list is a work in progress. Add missing node kinds to improve their error
             // spans.
-            case 218 /* VariableDeclaration */:
-            case 169 /* BindingElement */:
-            case 221 /* ClassDeclaration */:
-            case 192 /* ClassExpression */:
-            case 222 /* InterfaceDeclaration */:
-            case 225 /* ModuleDeclaration */:
-            case 224 /* EnumDeclaration */:
-            case 255 /* EnumMember */:
-            case 220 /* FunctionDeclaration */:
-            case 179 /* FunctionExpression */:
-            case 147 /* MethodDeclaration */:
-            case 149 /* GetAccessor */:
-            case 150 /* SetAccessor */:
-            case 223 /* TypeAliasDeclaration */:
+            case 226 /* VariableDeclaration */:
+            case 176 /* BindingElement */:
+            case 229 /* ClassDeclaration */:
+            case 199 /* ClassExpression */:
+            case 230 /* InterfaceDeclaration */:
+            case 233 /* ModuleDeclaration */:
+            case 232 /* EnumDeclaration */:
+            case 264 /* EnumMember */:
+            case 228 /* FunctionDeclaration */:
+            case 186 /* FunctionExpression */:
+            case 151 /* MethodDeclaration */:
+            case 153 /* GetAccessor */:
+            case 154 /* SetAccessor */:
+            case 231 /* TypeAliasDeclaration */:
                 errorNode = node.name;
                 break;
-            case 180 /* ArrowFunction */:
+            case 187 /* ArrowFunction */:
                 return getErrorSpanForArrowFunction(sourceFile, node);
         }
         if (errorNode === undefined) {
@@ -4054,12 +4597,8 @@ var ts;
         return (file.externalModuleIndicator || file.commonJsModuleIndicator) !== undefined;
     }
     ts.isExternalOrCommonJsModule = isExternalOrCommonJsModule;
-    function isDeclarationFile(file) {
-        return file.isDeclarationFile;
-    }
-    ts.isDeclarationFile = isDeclarationFile;
     function isConstEnumDeclaration(node) {
-        return node.kind === 224 /* EnumDeclaration */ && isConst(node);
+        return node.kind === 232 /* EnumDeclaration */ && isConst(node);
     }
     ts.isConstEnumDeclaration = isConstEnumDeclaration;
     function isConst(node) {
@@ -4071,12 +4610,17 @@ var ts;
         return !!(ts.getCombinedNodeFlags(node) & 1 /* Let */);
     }
     ts.isLet = isLet;
-    function isSuperCallExpression(n) {
-        return n.kind === 174 /* CallExpression */ && n.expression.kind === 95 /* SuperKeyword */;
+    function isSuperCall(n) {
+        return n.kind === 181 /* CallExpression */ && n.expression.kind === 97 /* SuperKeyword */;
     }
-    ts.isSuperCallExpression = isSuperCallExpression;
+    ts.isSuperCall = isSuperCall;
+    function isImportCall(n) {
+        return n.kind === 181 /* CallExpression */ && n.expression.kind === 91 /* ImportKeyword */;
+    }
+    ts.isImportCall = isImportCall;
     function isPrologueDirective(node) {
-        return node.kind === 202 /* ExpressionStatement */ && node.expression.kind === 9 /* StringLiteral */;
+        return node.kind === 210 /* ExpressionStatement */
+            && node.expression.kind === 9 /* StringLiteral */;
     }
     ts.isPrologueDirective = isPrologueDirective;
     function getLeadingCommentRangesOfNode(node, sourceFileOfNode) {
@@ -4087,103 +4631,99 @@ var ts;
         return ts.getLeadingCommentRanges(text, node.pos);
     }
     ts.getLeadingCommentRangesOfNodeFromText = getLeadingCommentRangesOfNodeFromText;
-    function getJsDocComments(node, sourceFileOfNode) {
-        return getJsDocCommentsFromText(node, sourceFileOfNode.text);
-    }
-    ts.getJsDocComments = getJsDocComments;
-    function getJsDocCommentsFromText(node, text) {
-        var commentRanges = (node.kind === 142 /* Parameter */ ||
-            node.kind === 141 /* TypeParameter */ ||
-            node.kind === 179 /* FunctionExpression */ ||
-            node.kind === 180 /* ArrowFunction */) ?
+    function getJSDocCommentRanges(node, text) {
+        var commentRanges = (node.kind === 146 /* Parameter */ ||
+            node.kind === 145 /* TypeParameter */ ||
+            node.kind === 186 /* FunctionExpression */ ||
+            node.kind === 187 /* ArrowFunction */) ?
             ts.concatenate(ts.getTrailingCommentRanges(text, node.pos), ts.getLeadingCommentRanges(text, node.pos)) :
             getLeadingCommentRangesOfNodeFromText(node, text);
-        return ts.filter(commentRanges, isJsDocComment);
-        function isJsDocComment(comment) {
-            // True if the comment starts with '/**' but not if it is '/**/'
+        // True if the comment starts with '/**' but not if it is '/**/'
+        return ts.filter(commentRanges, function (comment) {
             return text.charCodeAt(comment.pos + 1) === 42 /* asterisk */ &&
                 text.charCodeAt(comment.pos + 2) === 42 /* asterisk */ &&
                 text.charCodeAt(comment.pos + 3) !== 47 /* slash */;
-        }
+        });
     }
-    ts.getJsDocCommentsFromText = getJsDocCommentsFromText;
+    ts.getJSDocCommentRanges = getJSDocCommentRanges;
     ts.fullTripleSlashReferencePathRegEx = /^(\/\/\/\s*<reference\s+path\s*=\s*)('|")(.+?)\2.*?\/>/;
     ts.fullTripleSlashReferenceTypeReferenceDirectiveRegEx = /^(\/\/\/\s*<reference\s+types\s*=\s*)('|")(.+?)\2.*?\/>/;
     ts.fullTripleSlashAMDReferencePathRegEx = /^(\/\/\/\s*<amd-dependency\s+path\s*=\s*)('|")(.+?)\2.*?\/>/;
     function isPartOfTypeNode(node) {
-        if (154 /* FirstTypeNode */ <= node.kind && node.kind <= 166 /* LastTypeNode */) {
+        if (158 /* FirstTypeNode */ <= node.kind && node.kind <= 173 /* LastTypeNode */) {
             return true;
         }
         switch (node.kind) {
-            case 117 /* AnyKeyword */:
-            case 130 /* NumberKeyword */:
-            case 132 /* StringKeyword */:
-            case 120 /* BooleanKeyword */:
-            case 133 /* SymbolKeyword */:
-            case 135 /* UndefinedKeyword */:
-            case 127 /* NeverKeyword */:
+            case 119 /* AnyKeyword */:
+            case 133 /* NumberKeyword */:
+            case 136 /* StringKeyword */:
+            case 122 /* BooleanKeyword */:
+            case 137 /* SymbolKeyword */:
+            case 139 /* UndefinedKeyword */:
+            case 130 /* NeverKeyword */:
                 return true;
-            case 103 /* VoidKeyword */:
-                return node.parent.kind !== 183 /* VoidExpression */;
-            case 194 /* ExpressionWithTypeArguments */:
+            case 105 /* VoidKeyword */:
+                return node.parent.kind !== 190 /* VoidExpression */;
+            case 201 /* ExpressionWithTypeArguments */:
                 return !isExpressionWithTypeArgumentsInClassExtendsClause(node);
             // Identifiers and qualified names may be type nodes, depending on their context. Climb
             // above them to find the lowest container
-            case 69 /* Identifier */:
+            case 71 /* Identifier */:
                 // If the identifier is the RHS of a qualified name, then it's a type iff its parent is.
-                if (node.parent.kind === 139 /* QualifiedName */ && node.parent.right === node) {
+                if (node.parent.kind === 143 /* QualifiedName */ && node.parent.right === node) {
                     node = node.parent;
                 }
-                else if (node.parent.kind === 172 /* PropertyAccessExpression */ && node.parent.name === node) {
+                else if (node.parent.kind === 179 /* PropertyAccessExpression */ && node.parent.name === node) {
                     node = node.parent;
                 }
                 // At this point, node is either a qualified name or an identifier
-                ts.Debug.assert(node.kind === 69 /* Identifier */ || node.kind === 139 /* QualifiedName */ || node.kind === 172 /* PropertyAccessExpression */, "'node' was expected to be a qualified name, identifier or property access in 'isPartOfTypeNode'.");
-            case 139 /* QualifiedName */:
-            case 172 /* PropertyAccessExpression */:
-            case 97 /* ThisKeyword */:
+                ts.Debug.assert(node.kind === 71 /* Identifier */ || node.kind === 143 /* QualifiedName */ || node.kind === 179 /* PropertyAccessExpression */, "'node' was expected to be a qualified name, identifier or property access in 'isPartOfTypeNode'.");
+            // falls through
+            case 143 /* QualifiedName */:
+            case 179 /* PropertyAccessExpression */:
+            case 99 /* ThisKeyword */:
                 var parent_1 = node.parent;
-                if (parent_1.kind === 158 /* TypeQuery */) {
+                if (parent_1.kind === 162 /* TypeQuery */) {
                     return false;
                 }
                 // Do not recursively call isPartOfTypeNode on the parent. In the example:
                 //
                 //     let a: A.B.C;
                 //
-                // Calling isPartOfTypeNode would consider the qualified name A.B a type node. Only C or
-                // A.B.C is a type node.
-                if (154 /* FirstTypeNode */ <= parent_1.kind && parent_1.kind <= 166 /* LastTypeNode */) {
+                // Calling isPartOfTypeNode would consider the qualified name A.B a type node.
+                // Only C and A.B.C are type nodes.
+                if (158 /* FirstTypeNode */ <= parent_1.kind && parent_1.kind <= 173 /* LastTypeNode */) {
                     return true;
                 }
                 switch (parent_1.kind) {
-                    case 194 /* ExpressionWithTypeArguments */:
+                    case 201 /* ExpressionWithTypeArguments */:
                         return !isExpressionWithTypeArgumentsInClassExtendsClause(parent_1);
-                    case 141 /* TypeParameter */:
+                    case 145 /* TypeParameter */:
                         return node === parent_1.constraint;
-                    case 145 /* PropertyDeclaration */:
-                    case 144 /* PropertySignature */:
-                    case 142 /* Parameter */:
-                    case 218 /* VariableDeclaration */:
+                    case 149 /* PropertyDeclaration */:
+                    case 148 /* PropertySignature */:
+                    case 146 /* Parameter */:
+                    case 226 /* VariableDeclaration */:
                         return node === parent_1.type;
-                    case 220 /* FunctionDeclaration */:
-                    case 179 /* FunctionExpression */:
-                    case 180 /* ArrowFunction */:
-                    case 148 /* Constructor */:
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
+                    case 228 /* FunctionDeclaration */:
+                    case 186 /* FunctionExpression */:
+                    case 187 /* ArrowFunction */:
+                    case 152 /* Constructor */:
+                    case 151 /* MethodDeclaration */:
+                    case 150 /* MethodSignature */:
+                    case 153 /* GetAccessor */:
+                    case 154 /* SetAccessor */:
                         return node === parent_1.type;
-                    case 151 /* CallSignature */:
-                    case 152 /* ConstructSignature */:
-                    case 153 /* IndexSignature */:
+                    case 155 /* CallSignature */:
+                    case 156 /* ConstructSignature */:
+                    case 157 /* IndexSignature */:
                         return node === parent_1.type;
-                    case 177 /* TypeAssertionExpression */:
+                    case 184 /* TypeAssertionExpression */:
                         return node === parent_1.type;
-                    case 174 /* CallExpression */:
-                    case 175 /* NewExpression */:
+                    case 181 /* CallExpression */:
+                    case 182 /* NewExpression */:
                         return parent_1.typeArguments && ts.indexOf(parent_1.typeArguments, node) >= 0;
-                    case 176 /* TaggedTemplateExpression */:
+                    case 183 /* TaggedTemplateExpression */:
                         // TODO (drosen): TaggedTemplateExpressions may eventually support type arguments.
                         return false;
                 }
@@ -4191,29 +4731,39 @@ var ts;
         return false;
     }
     ts.isPartOfTypeNode = isPartOfTypeNode;
+    function isChildOfNodeWithKind(node, kind) {
+        while (node) {
+            if (node.kind === kind) {
+                return true;
+            }
+            node = node.parent;
+        }
+        return false;
+    }
+    ts.isChildOfNodeWithKind = isChildOfNodeWithKind;
     // Warning: This has the same semantics as the forEach family of functions,
     //          in that traversal terminates in the event that 'visitor' supplies a truthy value.
     function forEachReturnStatement(body, visitor) {
         return traverse(body);
         function traverse(node) {
             switch (node.kind) {
-                case 211 /* ReturnStatement */:
+                case 219 /* ReturnStatement */:
                     return visitor(node);
-                case 227 /* CaseBlock */:
-                case 199 /* Block */:
-                case 203 /* IfStatement */:
-                case 204 /* DoStatement */:
-                case 205 /* WhileStatement */:
-                case 206 /* ForStatement */:
-                case 207 /* ForInStatement */:
-                case 208 /* ForOfStatement */:
-                case 212 /* WithStatement */:
-                case 213 /* SwitchStatement */:
-                case 249 /* CaseClause */:
-                case 250 /* DefaultClause */:
-                case 214 /* LabeledStatement */:
-                case 216 /* TryStatement */:
-                case 252 /* CatchClause */:
+                case 235 /* CaseBlock */:
+                case 207 /* Block */:
+                case 211 /* IfStatement */:
+                case 212 /* DoStatement */:
+                case 213 /* WhileStatement */:
+                case 214 /* ForStatement */:
+                case 215 /* ForInStatement */:
+                case 216 /* ForOfStatement */:
+                case 220 /* WithStatement */:
+                case 221 /* SwitchStatement */:
+                case 257 /* CaseClause */:
+                case 258 /* DefaultClause */:
+                case 222 /* LabeledStatement */:
+                case 224 /* TryStatement */:
+                case 260 /* CatchClause */:
                     return ts.forEachChild(node, traverse);
             }
         }
@@ -4223,26 +4773,27 @@ var ts;
         return traverse(body);
         function traverse(node) {
             switch (node.kind) {
-                case 190 /* YieldExpression */:
+                case 197 /* YieldExpression */:
                     visitor(node);
                     var operand = node.expression;
                     if (operand) {
                         traverse(operand);
                     }
-                case 224 /* EnumDeclaration */:
-                case 222 /* InterfaceDeclaration */:
-                case 225 /* ModuleDeclaration */:
-                case 223 /* TypeAliasDeclaration */:
-                case 221 /* ClassDeclaration */:
-                case 192 /* ClassExpression */:
+                    return;
+                case 232 /* EnumDeclaration */:
+                case 230 /* InterfaceDeclaration */:
+                case 233 /* ModuleDeclaration */:
+                case 231 /* TypeAliasDeclaration */:
+                case 229 /* ClassDeclaration */:
+                case 199 /* ClassExpression */:
                     // These are not allowed inside a generator now, but eventually they may be allowed
                     // as local types. Regardless, any yield statements contained within them should be
                     // skipped in this traversal.
                     return;
                 default:
-                    if (isFunctionLike(node)) {
+                    if (ts.isFunctionLike(node)) {
                         var name_4 = node.name;
-                        if (name_4 && name_4.kind === 140 /* ComputedPropertyName */) {
+                        if (name_4 && name_4.kind === 144 /* ComputedPropertyName */) {
                             // Note that we will not include methods/accessors of a class because they would require
                             // first descending into the class. This is by design.
                             traverse(name_4.expression);
@@ -4258,91 +4809,81 @@ var ts;
         }
     }
     ts.forEachYieldExpression = forEachYieldExpression;
+    /**
+     * Gets the most likely element type for a TypeNode. This is not an exhaustive test
+     * as it assumes a rest argument can only be an array type (either T[], or Array<T>).
+     *
+     * @param node The type node.
+     */
+    function getRestParameterElementType(node) {
+        if (node && node.kind === 164 /* ArrayType */) {
+            return node.elementType;
+        }
+        else if (node && node.kind === 159 /* TypeReference */) {
+            return ts.singleOrUndefined(node.typeArguments);
+        }
+        else {
+            return undefined;
+        }
+    }
+    ts.getRestParameterElementType = getRestParameterElementType;
     function isVariableLike(node) {
         if (node) {
             switch (node.kind) {
-                case 169 /* BindingElement */:
-                case 255 /* EnumMember */:
-                case 142 /* Parameter */:
-                case 253 /* PropertyAssignment */:
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
-                case 254 /* ShorthandPropertyAssignment */:
-                case 218 /* VariableDeclaration */:
+                case 176 /* BindingElement */:
+                case 264 /* EnumMember */:
+                case 146 /* Parameter */:
+                case 261 /* PropertyAssignment */:
+                case 149 /* PropertyDeclaration */:
+                case 148 /* PropertySignature */:
+                case 262 /* ShorthandPropertyAssignment */:
+                case 226 /* VariableDeclaration */:
                     return true;
             }
         }
         return false;
     }
     ts.isVariableLike = isVariableLike;
-    function isAccessor(node) {
-        return node && (node.kind === 149 /* GetAccessor */ || node.kind === 150 /* SetAccessor */);
-    }
-    ts.isAccessor = isAccessor;
-    function isClassLike(node) {
-        return node && (node.kind === 221 /* ClassDeclaration */ || node.kind === 192 /* ClassExpression */);
-    }
-    ts.isClassLike = isClassLike;
-    function isFunctionLike(node) {
-        return node && isFunctionLikeKind(node.kind);
-    }
-    ts.isFunctionLike = isFunctionLike;
-    function isFunctionLikeKind(kind) {
-        switch (kind) {
-            case 148 /* Constructor */:
-            case 179 /* FunctionExpression */:
-            case 220 /* FunctionDeclaration */:
-            case 180 /* ArrowFunction */:
-            case 147 /* MethodDeclaration */:
-            case 146 /* MethodSignature */:
-            case 149 /* GetAccessor */:
-            case 150 /* SetAccessor */:
-            case 151 /* CallSignature */:
-            case 152 /* ConstructSignature */:
-            case 153 /* IndexSignature */:
-            case 156 /* FunctionType */:
-            case 157 /* ConstructorType */:
-                return true;
-        }
-        return false;
-    }
-    ts.isFunctionLikeKind = isFunctionLikeKind;
     function introducesArgumentsExoticObject(node) {
         switch (node.kind) {
-            case 147 /* MethodDeclaration */:
-            case 146 /* MethodSignature */:
-            case 148 /* Constructor */:
-            case 149 /* GetAccessor */:
-            case 150 /* SetAccessor */:
-            case 220 /* FunctionDeclaration */:
-            case 179 /* FunctionExpression */:
+            case 151 /* MethodDeclaration */:
+            case 150 /* MethodSignature */:
+            case 152 /* Constructor */:
+            case 153 /* GetAccessor */:
+            case 154 /* SetAccessor */:
+            case 228 /* FunctionDeclaration */:
+            case 186 /* FunctionExpression */:
                 return true;
         }
         return false;
     }
     ts.introducesArgumentsExoticObject = introducesArgumentsExoticObject;
-    function isIterationStatement(node, lookInLabeledStatements) {
-        switch (node.kind) {
-            case 206 /* ForStatement */:
-            case 207 /* ForInStatement */:
-            case 208 /* ForOfStatement */:
-            case 204 /* DoStatement */:
-            case 205 /* WhileStatement */:
-                return true;
-            case 214 /* LabeledStatement */:
-                return lookInLabeledStatements && isIterationStatement(node.statement, lookInLabeledStatements);
+    function unwrapInnermostStatementOfLabel(node, beforeUnwrapLabelCallback) {
+        while (true) {
+            if (beforeUnwrapLabelCallback) {
+                beforeUnwrapLabelCallback(node);
+            }
+            if (node.statement.kind !== 222 /* LabeledStatement */) {
+                return node.statement;
+            }
+            node = node.statement;
         }
-        return false;
     }
-    ts.isIterationStatement = isIterationStatement;
+    ts.unwrapInnermostStatementOfLabel = unwrapInnermostStatementOfLabel;
     function isFunctionBlock(node) {
-        return node && node.kind === 199 /* Block */ && isFunctionLike(node.parent);
+        return node && node.kind === 207 /* Block */ && ts.isFunctionLike(node.parent);
     }
     ts.isFunctionBlock = isFunctionBlock;
     function isObjectLiteralMethod(node) {
-        return node && node.kind === 147 /* MethodDeclaration */ && node.parent.kind === 171 /* ObjectLiteralExpression */;
+        return node && node.kind === 151 /* MethodDeclaration */ && node.parent.kind === 178 /* ObjectLiteralExpression */;
     }
     ts.isObjectLiteralMethod = isObjectLiteralMethod;
+    function isObjectLiteralOrClassExpressionMethod(node) {
+        return node.kind === 151 /* MethodDeclaration */ &&
+            (node.parent.kind === 178 /* ObjectLiteralExpression */ ||
+                node.parent.kind === 199 /* ClassExpression */);
+    }
+    ts.isObjectLiteralOrClassExpressionMethod = isObjectLiteralOrClassExpressionMethod;
     function isIdentifierTypePredicate(predicate) {
         return predicate && predicate.kind === 1 /* Identifier */;
     }
@@ -4351,10 +4892,19 @@ var ts;
         return predicate && predicate.kind === 0 /* This */;
     }
     ts.isThisTypePredicate = isThisTypePredicate;
+    function getPropertyAssignment(objectLiteral, key, key2) {
+        return ts.filter(objectLiteral.properties, function (property) {
+            if (property.kind === 261 /* PropertyAssignment */) {
+                var propName = getTextOfPropertyName(property.name);
+                return key === propName || (key2 && key2 === propName);
+            }
+        });
+    }
+    ts.getPropertyAssignment = getPropertyAssignment;
     function getContainingFunction(node) {
         while (true) {
             node = node.parent;
-            if (!node || isFunctionLike(node)) {
+            if (!node || ts.isFunctionLike(node)) {
                 return node;
             }
         }
@@ -4363,7 +4913,7 @@ var ts;
     function getContainingClass(node) {
         while (true) {
             node = node.parent;
-            if (!node || isClassLike(node)) {
+            if (!node || ts.isClassLike(node)) {
                 return node;
             }
         }
@@ -4376,12 +4926,12 @@ var ts;
                 return undefined;
             }
             switch (node.kind) {
-                case 140 /* ComputedPropertyName */:
+                case 144 /* ComputedPropertyName */:
                     // If the grandparent node is an object literal (as opposed to a class),
                     // then the computed property is not a 'this' container.
                     // A computed property name in a class needs to be a this container
                     // so that we can error on it.
-                    if (isClassLike(node.parent.parent)) {
+                    if (ts.isClassLike(node.parent.parent)) {
                         return node;
                     }
                     // If this is a computed property, then the parent should not
@@ -4391,52 +4941,65 @@ var ts;
                     // the *body* of the container.
                     node = node.parent;
                     break;
-                case 143 /* Decorator */:
+                case 147 /* Decorator */:
                     // Decorators are always applied outside of the body of a class or method.
-                    if (node.parent.kind === 142 /* Parameter */ && isClassElement(node.parent.parent)) {
+                    if (node.parent.kind === 146 /* Parameter */ && ts.isClassElement(node.parent.parent)) {
                         // If the decorator's parent is a Parameter, we resolve the this container from
                         // the grandparent class declaration.
                         node = node.parent.parent;
                     }
-                    else if (isClassElement(node.parent)) {
+                    else if (ts.isClassElement(node.parent)) {
                         // If the decorator's parent is a class element, we resolve the 'this' container
                         // from the parent class declaration.
                         node = node.parent;
                     }
                     break;
-                case 180 /* ArrowFunction */:
+                case 187 /* ArrowFunction */:
                     if (!includeArrowFunctions) {
                         continue;
                     }
-                // Fall through
-                case 220 /* FunctionDeclaration */:
-                case 179 /* FunctionExpression */:
-                case 225 /* ModuleDeclaration */:
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                case 148 /* Constructor */:
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                case 151 /* CallSignature */:
-                case 152 /* ConstructSignature */:
-                case 153 /* IndexSignature */:
-                case 224 /* EnumDeclaration */:
-                case 256 /* SourceFile */:
+                // falls through
+                case 228 /* FunctionDeclaration */:
+                case 186 /* FunctionExpression */:
+                case 233 /* ModuleDeclaration */:
+                case 149 /* PropertyDeclaration */:
+                case 148 /* PropertySignature */:
+                case 151 /* MethodDeclaration */:
+                case 150 /* MethodSignature */:
+                case 152 /* Constructor */:
+                case 153 /* GetAccessor */:
+                case 154 /* SetAccessor */:
+                case 155 /* CallSignature */:
+                case 156 /* ConstructSignature */:
+                case 157 /* IndexSignature */:
+                case 232 /* EnumDeclaration */:
+                case 265 /* SourceFile */:
                     return node;
             }
         }
     }
     ts.getThisContainer = getThisContainer;
+    function getNewTargetContainer(node) {
+        var container = getThisContainer(node, /*includeArrowFunctions*/ false);
+        if (container) {
+            switch (container.kind) {
+                case 152 /* Constructor */:
+                case 228 /* FunctionDeclaration */:
+                case 186 /* FunctionExpression */:
+                    return container;
+            }
+        }
+        return undefined;
+    }
+    ts.getNewTargetContainer = getNewTargetContainer;
     /**
-      * Given an super call/property node, returns the closest node where
-      * - a super call/property access is legal in the node and not legal in the parent node the node.
-      *   i.e. super call is legal in constructor but not legal in the class body.
-      * - the container is an arrow function (so caller might need to call getSuperContainer again in case it needs to climb higher)
-      * - a super call/property is definitely illegal in the container (but might be legal in some subnode)
-      *   i.e. super property access is illegal in function declaration but can be legal in the statement list
-      */
+     * Given an super call/property node, returns the closest node where
+     * - a super call/property access is legal in the node and not legal in the parent node the node.
+     *   i.e. super call is legal in constructor but not legal in the class body.
+     * - the container is an arrow function (so caller might need to call getSuperContainer again in case it needs to climb higher)
+     * - a super call/property is definitely illegal in the container (but might be legal in some subnode)
+     *   i.e. super property access is illegal in function declaration but can be legal in the statement list
+     */
     function getSuperContainer(node, stopOnFunctions) {
         while (true) {
             node = node.parent;
@@ -4444,31 +5007,32 @@ var ts;
                 return node;
             }
             switch (node.kind) {
-                case 140 /* ComputedPropertyName */:
+                case 144 /* ComputedPropertyName */:
                     node = node.parent;
                     break;
-                case 220 /* FunctionDeclaration */:
-                case 179 /* FunctionExpression */:
-                case 180 /* ArrowFunction */:
+                case 228 /* FunctionDeclaration */:
+                case 186 /* FunctionExpression */:
+                case 187 /* ArrowFunction */:
                     if (!stopOnFunctions) {
                         continue;
                     }
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                case 148 /* Constructor */:
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
+                // falls through
+                case 149 /* PropertyDeclaration */:
+                case 148 /* PropertySignature */:
+                case 151 /* MethodDeclaration */:
+                case 150 /* MethodSignature */:
+                case 152 /* Constructor */:
+                case 153 /* GetAccessor */:
+                case 154 /* SetAccessor */:
                     return node;
-                case 143 /* Decorator */:
+                case 147 /* Decorator */:
                     // Decorators are always applied outside of the body of a class or method.
-                    if (node.parent.kind === 142 /* Parameter */ && isClassElement(node.parent.parent)) {
+                    if (node.parent.kind === 146 /* Parameter */ && ts.isClassElement(node.parent.parent)) {
                         // If the decorator's parent is a Parameter, we resolve the this container from
                         // the grandparent class declaration.
                         node = node.parent.parent;
                     }
-                    else if (isClassElement(node.parent)) {
+                    else if (ts.isClassElement(node.parent)) {
                         // If the decorator's parent is a class element, we resolve the 'this' container
                         // from the parent class declaration.
                         node = node.parent;
@@ -4479,14 +5043,14 @@ var ts;
     }
     ts.getSuperContainer = getSuperContainer;
     function getImmediatelyInvokedFunctionExpression(func) {
-        if (func.kind === 179 /* FunctionExpression */ || func.kind === 180 /* ArrowFunction */) {
+        if (func.kind === 186 /* FunctionExpression */ || func.kind === 187 /* ArrowFunction */) {
             var prev = func;
             var parent_2 = func.parent;
-            while (parent_2.kind === 178 /* ParenthesizedExpression */) {
+            while (parent_2.kind === 185 /* ParenthesizedExpression */) {
                 prev = parent_2;
                 parent_2 = parent_2.parent;
             }
-            if (parent_2.kind === 174 /* CallExpression */ && parent_2.expression === prev) {
+            if (parent_2.kind === 181 /* CallExpression */ && parent_2.expression === prev) {
                 return parent_2;
             }
         }
@@ -4497,67 +5061,58 @@ var ts;
      */
     function isSuperProperty(node) {
         var kind = node.kind;
-        return (kind === 172 /* PropertyAccessExpression */ || kind === 173 /* ElementAccessExpression */)
-            && node.expression.kind === 95 /* SuperKeyword */;
+        return (kind === 179 /* PropertyAccessExpression */ || kind === 180 /* ElementAccessExpression */)
+            && node.expression.kind === 97 /* SuperKeyword */;
     }
     ts.isSuperProperty = isSuperProperty;
     function getEntityNameFromTypeNode(node) {
-        if (node) {
-            switch (node.kind) {
-                case 155 /* TypeReference */:
-                    return node.typeName;
-                case 194 /* ExpressionWithTypeArguments */:
-                    ts.Debug.assert(isEntityNameExpression(node.expression));
-                    return node.expression;
-                case 69 /* Identifier */:
-                case 139 /* QualifiedName */:
-                    return node;
-            }
+        switch (node.kind) {
+            case 159 /* TypeReference */:
+            case 277 /* JSDocTypeReference */:
+                return node.typeName;
+            case 201 /* ExpressionWithTypeArguments */:
+                return isEntityNameExpression(node.expression)
+                    ? node.expression
+                    : undefined;
+            case 71 /* Identifier */:
+            case 143 /* QualifiedName */:
+                return node;
         }
         return undefined;
     }
     ts.getEntityNameFromTypeNode = getEntityNameFromTypeNode;
-    function isCallLikeExpression(node) {
-        switch (node.kind) {
-            case 174 /* CallExpression */:
-            case 175 /* NewExpression */:
-            case 176 /* TaggedTemplateExpression */:
-            case 143 /* Decorator */:
-                return true;
-            default:
-                return false;
-        }
-    }
-    ts.isCallLikeExpression = isCallLikeExpression;
     function getInvokedExpression(node) {
-        if (node.kind === 176 /* TaggedTemplateExpression */) {
+        if (node.kind === 183 /* TaggedTemplateExpression */) {
             return node.tag;
         }
+        else if (ts.isJsxOpeningLikeElement(node)) {
+            return node.tagName;
+        }
         // Will either be a CallExpression, NewExpression, or Decorator.
         return node.expression;
     }
     ts.getInvokedExpression = getInvokedExpression;
     function nodeCanBeDecorated(node) {
         switch (node.kind) {
-            case 221 /* ClassDeclaration */:
+            case 229 /* ClassDeclaration */:
                 // classes are valid targets
                 return true;
-            case 145 /* PropertyDeclaration */:
+            case 149 /* PropertyDeclaration */:
                 // property declarations are valid if their parent is a class declaration.
-                return node.parent.kind === 221 /* ClassDeclaration */;
-            case 149 /* GetAccessor */:
-            case 150 /* SetAccessor */:
-            case 147 /* MethodDeclaration */:
+                return node.parent.kind === 229 /* ClassDeclaration */;
+            case 153 /* GetAccessor */:
+            case 154 /* SetAccessor */:
+            case 151 /* MethodDeclaration */:
                 // if this method has a body and its parent is a class declaration, this is a valid target.
                 return node.body !== undefined
-                    && node.parent.kind === 221 /* ClassDeclaration */;
-            case 142 /* Parameter */:
+                    && node.parent.kind === 229 /* ClassDeclaration */;
+            case 146 /* Parameter */:
                 // if the parameter's parent has a body and its grandparent is a class declaration, this is a valid target;
                 return node.parent.body !== undefined
-                    && (node.parent.kind === 148 /* Constructor */
-                        || node.parent.kind === 147 /* MethodDeclaration */
-                        || node.parent.kind === 150 /* SetAccessor */)
-                    && node.parent.parent.kind === 221 /* ClassDeclaration */;
+                    && (node.parent.kind === 152 /* Constructor */
+                        || node.parent.kind === 151 /* MethodDeclaration */
+                        || node.parent.kind === 154 /* SetAccessor */)
+                    && node.parent.parent.kind === 229 /* ClassDeclaration */;
         }
         return false;
     }
@@ -4573,19 +5128,19 @@ var ts;
     ts.nodeOrChildIsDecorated = nodeOrChildIsDecorated;
     function childIsDecorated(node) {
         switch (node.kind) {
-            case 221 /* ClassDeclaration */:
+            case 229 /* ClassDeclaration */:
                 return ts.forEach(node.members, nodeOrChildIsDecorated);
-            case 147 /* MethodDeclaration */:
-            case 150 /* SetAccessor */:
+            case 151 /* MethodDeclaration */:
+            case 154 /* SetAccessor */:
                 return ts.forEach(node.parameters, nodeIsDecorated);
         }
     }
     ts.childIsDecorated = childIsDecorated;
     function isJSXTagName(node) {
         var parent = node.parent;
-        if (parent.kind === 243 /* JsxOpeningElement */ ||
-            parent.kind === 242 /* JsxSelfClosingElement */ ||
-            parent.kind === 245 /* JsxClosingElement */) {
+        if (parent.kind === 251 /* JsxOpeningElement */ ||
+            parent.kind === 250 /* JsxSelfClosingElement */ ||
+            parent.kind === 252 /* JsxClosingElement */) {
             return parent.tagName === node;
         }
         return false;
@@ -4593,98 +5148,100 @@ var ts;
     ts.isJSXTagName = isJSXTagName;
     function isPartOfExpression(node) {
         switch (node.kind) {
-            case 97 /* ThisKeyword */:
-            case 95 /* SuperKeyword */:
-            case 93 /* NullKeyword */:
-            case 99 /* TrueKeyword */:
-            case 84 /* FalseKeyword */:
-            case 10 /* RegularExpressionLiteral */:
-            case 170 /* ArrayLiteralExpression */:
-            case 171 /* ObjectLiteralExpression */:
-            case 172 /* PropertyAccessExpression */:
-            case 173 /* ElementAccessExpression */:
-            case 174 /* CallExpression */:
-            case 175 /* NewExpression */:
-            case 176 /* TaggedTemplateExpression */:
-            case 195 /* AsExpression */:
-            case 177 /* TypeAssertionExpression */:
-            case 196 /* NonNullExpression */:
-            case 178 /* ParenthesizedExpression */:
-            case 179 /* FunctionExpression */:
-            case 192 /* ClassExpression */:
-            case 180 /* ArrowFunction */:
-            case 183 /* VoidExpression */:
-            case 181 /* DeleteExpression */:
-            case 182 /* TypeOfExpression */:
-            case 185 /* PrefixUnaryExpression */:
-            case 186 /* PostfixUnaryExpression */:
-            case 187 /* BinaryExpression */:
-            case 188 /* ConditionalExpression */:
-            case 191 /* SpreadElementExpression */:
-            case 189 /* TemplateExpression */:
-            case 11 /* NoSubstitutionTemplateLiteral */:
-            case 193 /* OmittedExpression */:
-            case 241 /* JsxElement */:
-            case 242 /* JsxSelfClosingElement */:
-            case 190 /* YieldExpression */:
-            case 184 /* AwaitExpression */:
+            case 99 /* ThisKeyword */:
+            case 97 /* SuperKeyword */:
+            case 95 /* NullKeyword */:
+            case 101 /* TrueKeyword */:
+            case 86 /* FalseKeyword */:
+            case 12 /* RegularExpressionLiteral */:
+            case 177 /* ArrayLiteralExpression */:
+            case 178 /* ObjectLiteralExpression */:
+            case 179 /* PropertyAccessExpression */:
+            case 180 /* ElementAccessExpression */:
+            case 181 /* CallExpression */:
+            case 182 /* NewExpression */:
+            case 183 /* TaggedTemplateExpression */:
+            case 202 /* AsExpression */:
+            case 184 /* TypeAssertionExpression */:
+            case 203 /* NonNullExpression */:
+            case 185 /* ParenthesizedExpression */:
+            case 186 /* FunctionExpression */:
+            case 199 /* ClassExpression */:
+            case 187 /* ArrowFunction */:
+            case 190 /* VoidExpression */:
+            case 188 /* DeleteExpression */:
+            case 189 /* TypeOfExpression */:
+            case 192 /* PrefixUnaryExpression */:
+            case 193 /* PostfixUnaryExpression */:
+            case 194 /* BinaryExpression */:
+            case 195 /* ConditionalExpression */:
+            case 198 /* SpreadElement */:
+            case 196 /* TemplateExpression */:
+            case 13 /* NoSubstitutionTemplateLiteral */:
+            case 200 /* OmittedExpression */:
+            case 249 /* JsxElement */:
+            case 250 /* JsxSelfClosingElement */:
+            case 197 /* YieldExpression */:
+            case 191 /* AwaitExpression */:
+            case 204 /* MetaProperty */:
                 return true;
-            case 139 /* QualifiedName */:
-                while (node.parent.kind === 139 /* QualifiedName */) {
+            case 143 /* QualifiedName */:
+                while (node.parent.kind === 143 /* QualifiedName */) {
                     node = node.parent;
                 }
-                return node.parent.kind === 158 /* TypeQuery */ || isJSXTagName(node);
-            case 69 /* Identifier */:
-                if (node.parent.kind === 158 /* TypeQuery */ || isJSXTagName(node)) {
+                return node.parent.kind === 162 /* TypeQuery */ || isJSXTagName(node);
+            case 71 /* Identifier */:
+                if (node.parent.kind === 162 /* TypeQuery */ || isJSXTagName(node)) {
                     return true;
                 }
-            // fall through
+            // falls through
             case 8 /* NumericLiteral */:
             case 9 /* StringLiteral */:
-            case 97 /* ThisKeyword */:
+            case 99 /* ThisKeyword */:
                 var parent_3 = node.parent;
                 switch (parent_3.kind) {
-                    case 218 /* VariableDeclaration */:
-                    case 142 /* Parameter */:
-                    case 145 /* PropertyDeclaration */:
-                    case 144 /* PropertySignature */:
-                    case 255 /* EnumMember */:
-                    case 253 /* PropertyAssignment */:
-                    case 169 /* BindingElement */:
+                    case 226 /* VariableDeclaration */:
+                    case 146 /* Parameter */:
+                    case 149 /* PropertyDeclaration */:
+                    case 148 /* PropertySignature */:
+                    case 264 /* EnumMember */:
+                    case 261 /* PropertyAssignment */:
+                    case 176 /* BindingElement */:
                         return parent_3.initializer === node;
-                    case 202 /* ExpressionStatement */:
-                    case 203 /* IfStatement */:
-                    case 204 /* DoStatement */:
-                    case 205 /* WhileStatement */:
-                    case 211 /* ReturnStatement */:
-                    case 212 /* WithStatement */:
-                    case 213 /* SwitchStatement */:
-                    case 249 /* CaseClause */:
-                    case 215 /* ThrowStatement */:
-                    case 213 /* SwitchStatement */:
+                    case 210 /* ExpressionStatement */:
+                    case 211 /* IfStatement */:
+                    case 212 /* DoStatement */:
+                    case 213 /* WhileStatement */:
+                    case 219 /* ReturnStatement */:
+                    case 220 /* WithStatement */:
+                    case 221 /* SwitchStatement */:
+                    case 257 /* CaseClause */:
+                    case 223 /* ThrowStatement */:
+                    case 221 /* SwitchStatement */:
                         return parent_3.expression === node;
-                    case 206 /* ForStatement */:
+                    case 214 /* ForStatement */:
                         var forStatement = parent_3;
-                        return (forStatement.initializer === node && forStatement.initializer.kind !== 219 /* VariableDeclarationList */) ||
+                        return (forStatement.initializer === node && forStatement.initializer.kind !== 227 /* VariableDeclarationList */) ||
                             forStatement.condition === node ||
                             forStatement.incrementor === node;
-                    case 207 /* ForInStatement */:
-                    case 208 /* ForOfStatement */:
+                    case 215 /* ForInStatement */:
+                    case 216 /* ForOfStatement */:
                         var forInStatement = parent_3;
-                        return (forInStatement.initializer === node && forInStatement.initializer.kind !== 219 /* VariableDeclarationList */) ||
+                        return (forInStatement.initializer === node && forInStatement.initializer.kind !== 227 /* VariableDeclarationList */) ||
                             forInStatement.expression === node;
-                    case 177 /* TypeAssertionExpression */:
-                    case 195 /* AsExpression */:
+                    case 184 /* TypeAssertionExpression */:
+                    case 202 /* AsExpression */:
                         return node === parent_3.expression;
-                    case 197 /* TemplateSpan */:
+                    case 205 /* TemplateSpan */:
                         return node === parent_3.expression;
-                    case 140 /* ComputedPropertyName */:
+                    case 144 /* ComputedPropertyName */:
                         return node === parent_3.expression;
-                    case 143 /* Decorator */:
-                    case 248 /* JsxExpression */:
-                    case 247 /* JsxSpreadAttribute */:
+                    case 147 /* Decorator */:
+                    case 256 /* JsxExpression */:
+                    case 255 /* JsxSpreadAttribute */:
+                    case 263 /* SpreadAssignment */:
                         return true;
-                    case 194 /* ExpressionWithTypeArguments */:
+                    case 201 /* ExpressionWithTypeArguments */:
                         return parent_3.expression === node && isExpressionWithTypeArgumentsInClassExtendsClause(parent_3);
                     default:
                         if (isPartOfExpression(parent_3)) {
@@ -4695,14 +5252,8 @@ var ts;
         return false;
     }
     ts.isPartOfExpression = isPartOfExpression;
-    function isInstantiatedModule(node, preserveConstEnums) {
-        var moduleState = ts.getModuleInstanceState(node);
-        return moduleState === 1 /* Instantiated */ ||
-            (preserveConstEnums && moduleState === 2 /* ConstEnumOnly */);
-    }
-    ts.isInstantiatedModule = isInstantiatedModule;
     function isExternalModuleImportEqualsDeclaration(node) {
-        return node.kind === 229 /* ImportEqualsDeclaration */ && node.moduleReference.kind === 240 /* ExternalModuleReference */;
+        return node.kind === 237 /* ImportEqualsDeclaration */ && node.moduleReference.kind === 248 /* ExternalModuleReference */;
     }
     ts.isExternalModuleImportEqualsDeclaration = isExternalModuleImportEqualsDeclaration;
     function getExternalModuleImportEqualsDeclarationExpression(node) {
@@ -4711,7 +5262,7 @@ var ts;
     }
     ts.getExternalModuleImportEqualsDeclarationExpression = getExternalModuleImportEqualsDeclarationExpression;
     function isInternalModuleImportEqualsDeclaration(node) {
-        return node.kind === 229 /* ImportEqualsDeclaration */ && node.moduleReference.kind !== 240 /* ExternalModuleReference */;
+        return node.kind === 237 /* ImportEqualsDeclaration */ && node.moduleReference.kind !== 248 /* ExternalModuleReference */;
     }
     ts.isInternalModuleImportEqualsDeclaration = isInternalModuleImportEqualsDeclaration;
     function isSourceFileJavaScript(file) {
@@ -4719,21 +5270,27 @@ var ts;
     }
     ts.isSourceFileJavaScript = isSourceFileJavaScript;
     function isInJavaScriptFile(node) {
-        return node && !!(node.flags & 1048576 /* JavaScriptFile */);
+        return node && !!(node.flags & 65536 /* JavaScriptFile */);
     }
     ts.isInJavaScriptFile = isInJavaScriptFile;
     /**
      * Returns true if the node is a CallExpression to the identifier 'require' with
-     * exactly one argument.
+     * exactly one argument (of the form 'require("name")').
      * This function does not test if the node is in a JavaScript file or not.
-    */
-    function isRequireCall(expression, checkArgumentIsStringLiteral) {
-        // of the form 'require("name")'
-        var isRequire = expression.kind === 174 /* CallExpression */ &&
-            expression.expression.kind === 69 /* Identifier */ &&
-            expression.expression.text === "require" &&
-            expression.arguments.length === 1;
-        return isRequire && (!checkArgumentIsStringLiteral || expression.arguments[0].kind === 9 /* StringLiteral */);
+     */
+    function isRequireCall(callExpression, checkArgumentIsStringLiteral) {
+        if (callExpression.kind !== 181 /* CallExpression */) {
+            return false;
+        }
+        var _a = callExpression, expression = _a.expression, args = _a.arguments;
+        if (expression.kind !== 71 /* Identifier */ || expression.text !== "require") {
+            return false;
+        }
+        if (args.length !== 1) {
+            return false;
+        }
+        var arg = args[0];
+        return !checkArgumentIsStringLiteral || arg.kind === 9 /* StringLiteral */ || arg.kind === 13 /* NoSubstitutionTemplateLiteral */;
     }
     ts.isRequireCall = isRequireCall;
     function isSingleOrDoubleQuote(charCode) {
@@ -4744,29 +5301,41 @@ var ts;
      * Returns true if the node is a variable declaration whose initializer is a function expression.
      * This function does not test if the node is in a JavaScript file or not.
      */
-    function isDeclarationOfFunctionExpression(s) {
-        if (s.valueDeclaration && s.valueDeclaration.kind === 218 /* VariableDeclaration */) {
+    function isDeclarationOfFunctionOrClassExpression(s) {
+        if (s.valueDeclaration && s.valueDeclaration.kind === 226 /* VariableDeclaration */) {
             var declaration = s.valueDeclaration;
-            return declaration.initializer && declaration.initializer.kind === 179 /* FunctionExpression */;
+            return declaration.initializer && (declaration.initializer.kind === 186 /* FunctionExpression */ || declaration.initializer.kind === 199 /* ClassExpression */);
         }
         return false;
     }
-    ts.isDeclarationOfFunctionExpression = isDeclarationOfFunctionExpression;
+    ts.isDeclarationOfFunctionOrClassExpression = isDeclarationOfFunctionOrClassExpression;
+    function getRightMostAssignedExpression(node) {
+        while (isAssignmentExpression(node, /*excludeCompoundAssignements*/ true)) {
+            node = node.right;
+        }
+        return node;
+    }
+    ts.getRightMostAssignedExpression = getRightMostAssignedExpression;
+    function isExportsIdentifier(node) {
+        return ts.isIdentifier(node) && node.text === "exports";
+    }
+    ts.isExportsIdentifier = isExportsIdentifier;
+    function isModuleExportsPropertyAccessExpression(node) {
+        return ts.isPropertyAccessExpression(node) && ts.isIdentifier(node.expression) && node.expression.text === "module" && node.name.text === "exports";
+    }
+    ts.isModuleExportsPropertyAccessExpression = isModuleExportsPropertyAccessExpression;
     /// Given a BinaryExpression, returns SpecialPropertyAssignmentKind for the various kinds of property
     /// assignments we treat as special in the binder
     function getSpecialPropertyAssignmentKind(expression) {
         if (!isInJavaScriptFile(expression)) {
             return 0 /* None */;
         }
-        if (expression.kind !== 187 /* BinaryExpression */) {
-            return 0 /* None */;
-        }
         var expr = expression;
-        if (expr.operatorToken.kind !== 56 /* EqualsToken */ || expr.left.kind !== 172 /* PropertyAccessExpression */) {
+        if (expr.operatorToken.kind !== 58 /* EqualsToken */ || expr.left.kind !== 179 /* PropertyAccessExpression */) {
             return 0 /* None */;
         }
         var lhs = expr.left;
-        if (lhs.expression.kind === 69 /* Identifier */) {
+        if (lhs.expression.kind === 71 /* Identifier */) {
             var lhsId = lhs.expression;
             if (lhsId.text === "exports") {
                 // exports.name = expr
@@ -4776,14 +5345,18 @@ var ts;
                 // module.exports = expr
                 return 2 /* ModuleExports */;
             }
+            else {
+                // F.x = expr
+                return 5 /* Property */;
+            }
         }
-        else if (lhs.expression.kind === 97 /* ThisKeyword */) {
+        else if (lhs.expression.kind === 99 /* ThisKeyword */) {
             return 4 /* ThisProperty */;
         }
-        else if (lhs.expression.kind === 172 /* PropertyAccessExpression */) {
+        else if (lhs.expression.kind === 179 /* PropertyAccessExpression */) {
             // chained dot, e.g. x.y.z = expr; this var is the 'x.y' part
             var innerPropertyAccess = lhs.expression;
-            if (innerPropertyAccess.expression.kind === 69 /* Identifier */) {
+            if (innerPropertyAccess.expression.kind === 71 /* Identifier */) {
                 // module.exports.name = expr
                 var innerPropertyAccessIdentifier = innerPropertyAccess.expression;
                 if (innerPropertyAccessIdentifier.text === "module" && innerPropertyAccess.name.text === "exports") {
@@ -4798,35 +5371,35 @@ var ts;
     }
     ts.getSpecialPropertyAssignmentKind = getSpecialPropertyAssignmentKind;
     function getExternalModuleName(node) {
-        if (node.kind === 230 /* ImportDeclaration */) {
+        if (node.kind === 238 /* ImportDeclaration */) {
             return node.moduleSpecifier;
         }
-        if (node.kind === 229 /* ImportEqualsDeclaration */) {
+        if (node.kind === 237 /* ImportEqualsDeclaration */) {
             var reference = node.moduleReference;
-            if (reference.kind === 240 /* ExternalModuleReference */) {
+            if (reference.kind === 248 /* ExternalModuleReference */) {
                 return reference.expression;
             }
         }
-        if (node.kind === 236 /* ExportDeclaration */) {
+        if (node.kind === 244 /* ExportDeclaration */) {
             return node.moduleSpecifier;
         }
-        if (node.kind === 225 /* ModuleDeclaration */ && node.name.kind === 9 /* StringLiteral */) {
+        if (node.kind === 233 /* ModuleDeclaration */ && node.name.kind === 9 /* StringLiteral */) {
             return node.name;
         }
     }
     ts.getExternalModuleName = getExternalModuleName;
     function getNamespaceDeclarationNode(node) {
-        if (node.kind === 229 /* ImportEqualsDeclaration */) {
+        if (node.kind === 237 /* ImportEqualsDeclaration */) {
             return node;
         }
         var importClause = node.importClause;
-        if (importClause && importClause.namedBindings && importClause.namedBindings.kind === 232 /* NamespaceImport */) {
+        if (importClause && importClause.namedBindings && importClause.namedBindings.kind === 240 /* NamespaceImport */) {
             return importClause.namedBindings;
         }
     }
     ts.getNamespaceDeclarationNode = getNamespaceDeclarationNode;
     function isDefaultImport(node) {
-        return node.kind === 230 /* ImportDeclaration */
+        return node.kind === 238 /* ImportDeclaration */
             && node.importClause
             && !!node.importClause.name;
     }
@@ -4834,13 +5407,13 @@ var ts;
     function hasQuestionToken(node) {
         if (node) {
             switch (node.kind) {
-                case 142 /* Parameter */:
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                case 254 /* ShorthandPropertyAssignment */:
-                case 253 /* PropertyAssignment */:
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
+                case 146 /* Parameter */:
+                case 151 /* MethodDeclaration */:
+                case 150 /* MethodSignature */:
+                case 262 /* ShorthandPropertyAssignment */:
+                case 261 /* PropertyAssignment */:
+                case 149 /* PropertyDeclaration */:
+                case 148 /* PropertySignature */:
                     return node.questionToken !== undefined;
             }
         }
@@ -4848,132 +5421,98 @@ var ts;
     }
     ts.hasQuestionToken = hasQuestionToken;
     function isJSDocConstructSignature(node) {
-        return node.kind === 269 /* JSDocFunctionType */ &&
+        return node.kind === 279 /* JSDocFunctionType */ &&
             node.parameters.length > 0 &&
-            node.parameters[0].type.kind === 271 /* JSDocConstructorType */;
+            node.parameters[0].type.kind === 281 /* JSDocConstructorType */;
     }
     ts.isJSDocConstructSignature = isJSDocConstructSignature;
-    function getJSDocTag(node, kind, checkParentVariableStatement) {
-        if (!node) {
-            return undefined;
-        }
-        var jsDocTags = getJSDocTags(node, checkParentVariableStatement);
-        if (!jsDocTags) {
-            return undefined;
-        }
-        for (var _i = 0, jsDocTags_1 = jsDocTags; _i < jsDocTags_1.length; _i++) {
-            var tag = jsDocTags_1[_i];
-            if (tag.kind === kind) {
-                return tag;
-            }
-        }
-    }
-    function append(previous, additional) {
-        if (additional) {
-            if (!previous) {
-                previous = [];
-            }
-            for (var _i = 0, additional_1 = additional; _i < additional_1.length; _i++) {
-                var x = additional_1[_i];
-                previous.push(x);
-            }
-        }
-        return previous;
+    function getCommentsFromJSDoc(node) {
+        return ts.map(getJSDocs(node), function (doc) { return doc.comment; });
+    }
+    ts.getCommentsFromJSDoc = getCommentsFromJSDoc;
+    function hasJSDocParameterTags(node) {
+        var parameterTags = getJSDocTags(node, 287 /* JSDocParameterTag */);
+        return parameterTags && parameterTags.length > 0;
+    }
+    ts.hasJSDocParameterTags = hasJSDocParameterTags;
+    function getJSDocTags(node, kind) {
+        return ts.flatMap(getJSDocs(node), function (doc) {
+            return doc.kind === 283 /* JSDocComment */
+                ? ts.filter(doc.tags, function (tag) { return tag.kind === kind; })
+                : doc.kind === kind && doc;
+        });
     }
-    function getJSDocComments(node, checkParentVariableStatement) {
-        return getJSDocs(node, checkParentVariableStatement, function (docs) { return ts.map(docs, function (doc) { return doc.comment; }); }, function (tags) { return ts.map(tags, function (tag) { return tag.comment; }); });
+    function getFirstJSDocTag(node, kind) {
+        return node && ts.firstOrUndefined(getJSDocTags(node, kind));
     }
-    ts.getJSDocComments = getJSDocComments;
-    function getJSDocTags(node, checkParentVariableStatement) {
-        return getJSDocs(node, checkParentVariableStatement, function (docs) {
-            var result = [];
-            for (var _i = 0, docs_1 = docs; _i < docs_1.length; _i++) {
-                var doc = docs_1[_i];
-                if (doc.tags) {
-                    result.push.apply(result, doc.tags);
-                }
-            }
-            return result;
-        }, function (tags) { return tags; });
-    }
-    function getJSDocs(node, checkParentVariableStatement, getDocs, getTags) {
-        // TODO: Get rid of getJsDocComments and friends (note the lowercase 's' in Js)
-        // TODO: A lot of this work should be cached, maybe. I guess it's only used in services right now...
-        var result = undefined;
-        // prepend documentation from parent sources
-        if (checkParentVariableStatement) {
+    function getJSDocs(node) {
+        if (ts.isJSDocTypedefTag(node)) {
+            return [node.parent];
+        }
+        var cache = node.jsDocCache;
+        if (!cache) {
+            getJSDocsWorker(node);
+            node.jsDocCache = cache;
+        }
+        return cache;
+        function getJSDocsWorker(node) {
+            var parent = node.parent;
             // Try to recognize this pattern when node is initializer of variable declaration and JSDoc comments are on containing variable statement.
             // /**
             //   * @param {number} name
             //   * @returns {number}
             //   */
             // var x = function(name) { return name.length; }
-            var isInitializerOfVariableDeclarationInStatement = isVariableLike(node.parent) &&
-                (node.parent).initializer === node &&
-                node.parent.parent.parent.kind === 200 /* VariableStatement */;
+            var isInitializerOfVariableDeclarationInStatement = isVariableLike(parent) &&
+                parent.initializer === node &&
+                parent.parent.parent.kind === 208 /* VariableStatement */;
             var isVariableOfVariableDeclarationStatement = isVariableLike(node) &&
-                node.parent.parent.kind === 200 /* VariableStatement */;
-            var variableStatementNode = isInitializerOfVariableDeclarationInStatement ? node.parent.parent.parent :
-                isVariableOfVariableDeclarationStatement ? node.parent.parent :
+                parent.parent.kind === 208 /* VariableStatement */;
+            var variableStatementNode = isInitializerOfVariableDeclarationInStatement ? parent.parent.parent :
+                isVariableOfVariableDeclarationStatement ? parent.parent :
                     undefined;
             if (variableStatementNode) {
-                result = append(result, getJSDocs(variableStatementNode, checkParentVariableStatement, getDocs, getTags));
-            }
-            if (node.kind === 225 /* ModuleDeclaration */ &&
-                node.parent && node.parent.kind === 225 /* ModuleDeclaration */) {
-                result = append(result, getJSDocs(node.parent, checkParentVariableStatement, getDocs, getTags));
+                getJSDocsWorker(variableStatementNode);
             }
             // Also recognize when the node is the RHS of an assignment expression
-            var parent_4 = node.parent;
-            var isSourceOfAssignmentExpressionStatement = parent_4 && parent_4.parent &&
-                parent_4.kind === 187 /* BinaryExpression */ &&
-                parent_4.operatorToken.kind === 56 /* EqualsToken */ &&
-                parent_4.parent.kind === 202 /* ExpressionStatement */;
+            var isSourceOfAssignmentExpressionStatement = parent && parent.parent &&
+                parent.kind === 194 /* BinaryExpression */ &&
+                parent.operatorToken.kind === 58 /* EqualsToken */ &&
+                parent.parent.kind === 210 /* ExpressionStatement */;
             if (isSourceOfAssignmentExpressionStatement) {
-                result = append(result, getJSDocs(parent_4.parent, checkParentVariableStatement, getDocs, getTags));
+                getJSDocsWorker(parent.parent);
             }
-            var isPropertyAssignmentExpression = parent_4 && parent_4.kind === 253 /* PropertyAssignment */;
-            if (isPropertyAssignmentExpression) {
-                result = append(result, getJSDocs(parent_4, checkParentVariableStatement, getDocs, getTags));
+            var isModuleDeclaration = node.kind === 233 /* ModuleDeclaration */ &&
+                parent && parent.kind === 233 /* ModuleDeclaration */;
+            var isPropertyAssignmentExpression = parent && parent.kind === 261 /* PropertyAssignment */;
+            if (isModuleDeclaration || isPropertyAssignmentExpression) {
+                getJSDocsWorker(parent);
             }
             // Pull parameter comments from declaring function as well
-            if (node.kind === 142 /* Parameter */) {
-                var paramTags = getJSDocParameterTag(node, checkParentVariableStatement);
-                if (paramTags) {
-                    result = append(result, getTags(paramTags));
-                }
+            if (node.kind === 146 /* Parameter */) {
+                cache = ts.concatenate(cache, getJSDocParameterTags(node));
             }
-        }
-        if (isVariableLike(node) && node.initializer) {
-            result = append(result, getJSDocs(node.initializer, /*checkParentVariableStatement*/ false, getDocs, getTags));
-        }
-        if (node.jsDocComments) {
-            if (result) {
-                result = append(result, getDocs(node.jsDocComments));
-            }
-            else {
-                return getDocs(node.jsDocComments);
+            if (isVariableLike(node) && node.initializer) {
+                cache = ts.concatenate(cache, node.initializer.jsDoc);
             }
+            cache = ts.concatenate(cache, node.jsDoc);
         }
-        return result;
     }
-    function getJSDocParameterTag(param, checkParentVariableStatement) {
+    ts.getJSDocs = getJSDocs;
+    function getJSDocParameterTags(param) {
         var func = param.parent;
-        var tags = getJSDocTags(func, checkParentVariableStatement);
+        var tags = getJSDocTags(func, 287 /* JSDocParameterTag */);
         if (!param.name) {
             // this is an anonymous jsdoc param from a `function(type1, type2): type3` specification
             var i = func.parameters.indexOf(param);
-            var paramTags = ts.filter(tags, function (tag) { return tag.kind === 275 /* JSDocParameterTag */; });
+            var paramTags = ts.filter(tags, function (tag) { return tag.kind === 287 /* JSDocParameterTag */; });
             if (paramTags && 0 <= i && i < paramTags.length) {
                 return [paramTags[i]];
             }
         }
-        else if (param.name.kind === 69 /* Identifier */) {
+        else if (param.name.kind === 71 /* Identifier */) {
             var name_5 = param.name.text;
-            var paramTags = ts.filter(tags, function (tag) { return tag.kind === 275 /* JSDocParameterTag */ && tag.parameterName.text === name_5; });
-            if (paramTags) {
-                return paramTags;
-            }
+            return ts.filter(tags, function (tag) { return tag.kind === 287 /* JSDocParameterTag */ && tag.name.text === name_5; });
         }
         else {
             // TODO: it's a destructured parameter, so it should look up an "object type" series of multiple lines
@@ -4981,40 +5520,58 @@ var ts;
             return undefined;
         }
     }
-    function getJSDocTypeTag(node) {
-        return getJSDocTag(node, 277 /* JSDocTypeTag */, /*checkParentVariableStatement*/ false);
+    ts.getJSDocParameterTags = getJSDocParameterTags;
+    /** Does the opposite of `getJSDocParameterTags`: given a JSDoc parameter, finds the parameter corresponding to it. */
+    function getParameterFromJSDoc(node) {
+        var name = node.name.text;
+        var grandParent = node.parent.parent;
+        ts.Debug.assert(node.parent.kind === 283 /* JSDocComment */);
+        if (!ts.isFunctionLike(grandParent)) {
+            return undefined;
+        }
+        return ts.find(grandParent.parameters, function (p) {
+            return p.name.kind === 71 /* Identifier */ && p.name.text === name;
+        });
     }
-    ts.getJSDocTypeTag = getJSDocTypeTag;
+    ts.getParameterFromJSDoc = getParameterFromJSDoc;
+    function getTypeParameterFromJsDoc(node) {
+        var name = node.name.text;
+        var typeParameters = node.parent.parent.parent.typeParameters;
+        return ts.find(typeParameters, function (p) { return p.name.text === name; });
+    }
+    ts.getTypeParameterFromJsDoc = getTypeParameterFromJsDoc;
+    function getJSDocType(node) {
+        var tag = getFirstJSDocTag(node, 289 /* JSDocTypeTag */);
+        if (!tag && node.kind === 146 /* Parameter */) {
+            var paramTags = getJSDocParameterTags(node);
+            if (paramTags) {
+                tag = ts.find(paramTags, function (tag) { return !!tag.typeExpression; });
+            }
+        }
+        return tag && tag.typeExpression && tag.typeExpression.type;
+    }
+    ts.getJSDocType = getJSDocType;
+    function getJSDocAugmentsTag(node) {
+        return getFirstJSDocTag(node, 285 /* JSDocAugmentsTag */);
+    }
+    ts.getJSDocAugmentsTag = getJSDocAugmentsTag;
+    function getJSDocClassTag(node) {
+        return getFirstJSDocTag(node, 286 /* JSDocClassTag */);
+    }
+    ts.getJSDocClassTag = getJSDocClassTag;
     function getJSDocReturnTag(node) {
-        return getJSDocTag(node, 276 /* JSDocReturnTag */, /*checkParentVariableStatement*/ true);
+        return getFirstJSDocTag(node, 288 /* JSDocReturnTag */);
     }
     ts.getJSDocReturnTag = getJSDocReturnTag;
+    function getJSDocReturnType(node) {
+        var returnTag = getJSDocReturnTag(node);
+        return returnTag && returnTag.typeExpression && returnTag.typeExpression.type;
+    }
+    ts.getJSDocReturnType = getJSDocReturnType;
     function getJSDocTemplateTag(node) {
-        return getJSDocTag(node, 278 /* JSDocTemplateTag */, /*checkParentVariableStatement*/ false);
+        return getFirstJSDocTag(node, 290 /* JSDocTemplateTag */);
     }
     ts.getJSDocTemplateTag = getJSDocTemplateTag;
-    function getCorrespondingJSDocParameterTag(parameter) {
-        if (parameter.name && parameter.name.kind === 69 /* Identifier */) {
-            // If it's a parameter, see if the parent has a jsdoc comment with an @param
-            // annotation.
-            var parameterName = parameter.name.text;
-            var jsDocTags = getJSDocTags(parameter.parent, /*checkParentVariableStatement*/ true);
-            if (!jsDocTags) {
-                return undefined;
-            }
-            for (var _i = 0, jsDocTags_2 = jsDocTags; _i < jsDocTags_2.length; _i++) {
-                var tag = jsDocTags_2[_i];
-                if (tag.kind === 275 /* JSDocParameterTag */) {
-                    var parameterTag = tag;
-                    if (parameterTag.parameterName.text === parameterName) {
-                        return parameterTag;
-                    }
-                }
-            }
-        }
-        return undefined;
-    }
-    ts.getCorrespondingJSDocParameterTag = getCorrespondingJSDocParameterTag;
     function hasRestParameter(s) {
         return isRestParameter(ts.lastOrUndefined(s.parameters));
     }
@@ -5024,14 +5581,11 @@ var ts;
     }
     ts.hasDeclaredRestParameter = hasDeclaredRestParameter;
     function isRestParameter(node) {
-        if (node && (node.flags & 1048576 /* JavaScriptFile */)) {
-            if (node.type && node.type.kind === 270 /* JSDocVariadicType */) {
+        if (node && (node.flags & 65536 /* JavaScriptFile */)) {
+            if (node.type && node.type.kind === 280 /* JSDocVariadicType */ ||
+                ts.forEach(getJSDocParameterTags(node), function (t) { return t.typeExpression && t.typeExpression.type.kind === 280 /* JSDocVariadicType */; })) {
                 return true;
             }
-            var paramTag = getCorrespondingJSDocParameterTag(node);
-            if (paramTag && paramTag.typeExpression) {
-                return paramTag.typeExpression.type.kind === 270 /* JSDocVariadicType */;
-            }
         }
         return isDeclaredRestParam(node);
     }
@@ -5040,31 +5594,72 @@ var ts;
         return node && node.dotDotDotToken !== undefined;
     }
     ts.isDeclaredRestParam = isDeclaredRestParam;
+    var AssignmentKind;
+    (function (AssignmentKind) {
+        AssignmentKind[AssignmentKind["None"] = 0] = "None";
+        AssignmentKind[AssignmentKind["Definite"] = 1] = "Definite";
+        AssignmentKind[AssignmentKind["Compound"] = 2] = "Compound";
+    })(AssignmentKind = ts.AssignmentKind || (ts.AssignmentKind = {}));
+    function getAssignmentTargetKind(node) {
+        var parent = node.parent;
+        while (true) {
+            switch (parent.kind) {
+                case 194 /* BinaryExpression */:
+                    var binaryOperator = parent.operatorToken.kind;
+                    return isAssignmentOperator(binaryOperator) && parent.left === node ?
+                        binaryOperator === 58 /* EqualsToken */ ? 1 /* Definite */ : 2 /* Compound */ :
+                        0 /* None */;
+                case 192 /* PrefixUnaryExpression */:
+                case 193 /* PostfixUnaryExpression */:
+                    var unaryOperator = parent.operator;
+                    return unaryOperator === 43 /* PlusPlusToken */ || unaryOperator === 44 /* MinusMinusToken */ ? 2 /* Compound */ : 0 /* None */;
+                case 215 /* ForInStatement */:
+                case 216 /* ForOfStatement */:
+                    return parent.initializer === node ? 1 /* Definite */ : 0 /* None */;
+                case 185 /* ParenthesizedExpression */:
+                case 177 /* ArrayLiteralExpression */:
+                case 198 /* SpreadElement */:
+                    node = parent;
+                    break;
+                case 262 /* ShorthandPropertyAssignment */:
+                    if (parent.name !== node) {
+                        return 0 /* None */;
+                    }
+                    node = parent.parent;
+                    break;
+                case 261 /* PropertyAssignment */:
+                    if (parent.name === node) {
+                        return 0 /* None */;
+                    }
+                    node = parent.parent;
+                    break;
+                default:
+                    return 0 /* None */;
+            }
+            parent = node.parent;
+        }
+    }
+    ts.getAssignmentTargetKind = getAssignmentTargetKind;
     // A node is an assignment target if it is on the left hand side of an '=' token, if it is parented by a property
     // assignment in an object literal that is an assignment target, or if it is parented by an array literal that is
-    // an assignment target. Examples include 'a = xxx', '{ p: a } = xxx', '[{ p: a}] = xxx'.
+    // an assignment target. Examples include 'a = xxx', '{ p: a } = xxx', '[{ a }] = xxx'.
+    // (Note that `p` is not a target in the above examples, only `a`.)
     function isAssignmentTarget(node) {
-        while (node.parent.kind === 178 /* ParenthesizedExpression */) {
-            node = node.parent;
+        return getAssignmentTargetKind(node) !== 0 /* None */;
+    }
+    ts.isAssignmentTarget = isAssignmentTarget;
+    // a node is delete target iff. it is PropertyAccessExpression/ElementAccessExpression with parentheses skipped
+    function isDeleteTarget(node) {
+        if (node.kind !== 179 /* PropertyAccessExpression */ && node.kind !== 180 /* ElementAccessExpression */) {
+            return false;
         }
-        while (true) {
-            var parent_5 = node.parent;
-            if (parent_5.kind === 170 /* ArrayLiteralExpression */ || parent_5.kind === 191 /* SpreadElementExpression */) {
-                node = parent_5;
-                continue;
-            }
-            if (parent_5.kind === 253 /* PropertyAssignment */ || parent_5.kind === 254 /* ShorthandPropertyAssignment */) {
-                node = parent_5.parent;
-                continue;
-            }
-            return parent_5.kind === 187 /* BinaryExpression */ &&
-                isAssignmentOperator(parent_5.operatorToken.kind) &&
-                parent_5.left === node ||
-                (parent_5.kind === 207 /* ForInStatement */ || parent_5.kind === 208 /* ForOfStatement */) &&
-                    parent_5.initializer === node;
+        node = node.parent;
+        while (node && node.kind === 185 /* ParenthesizedExpression */) {
+            node = node.parent;
         }
+        return node && node.kind === 188 /* DeleteExpression */;
     }
-    ts.isAssignmentTarget = isAssignmentTarget;
+    ts.isDeleteTarget = isDeleteTarget;
     function isNodeDescendantOf(node, ancestor) {
         while (node) {
             if (node === ancestor)
@@ -5076,7 +5671,7 @@ var ts;
     ts.isNodeDescendantOf = isNodeDescendantOf;
     function isInAmbientContext(node) {
         while (node) {
-            if (hasModifier(node, 2 /* Ambient */) || (node.kind === 256 /* SourceFile */ && node.isDeclarationFile)) {
+            if (hasModifier(node, 2 /* Ambient */) || (node.kind === 265 /* SourceFile */ && node.isDeclarationFile)) {
                 return true;
             }
             node = node.parent;
@@ -5086,56 +5681,68 @@ var ts;
     ts.isInAmbientContext = isInAmbientContext;
     // True if the given identifier, string literal, or number literal is the name of a declaration node
     function isDeclarationName(name) {
-        if (name.kind !== 69 /* Identifier */ && name.kind !== 9 /* StringLiteral */ && name.kind !== 8 /* NumericLiteral */) {
-            return false;
-        }
-        var parent = name.parent;
-        if (parent.kind === 234 /* ImportSpecifier */ || parent.kind === 238 /* ExportSpecifier */) {
-            if (parent.propertyName) {
-                return true;
-            }
-        }
-        if (isDeclaration(parent)) {
-            return parent.name === name;
+        switch (name.kind) {
+            case 71 /* Identifier */:
+            case 9 /* StringLiteral */:
+            case 8 /* NumericLiteral */:
+                return ts.isDeclaration(name.parent) && name.parent.name === name;
+            default:
+                return false;
         }
-        return false;
     }
     ts.isDeclarationName = isDeclarationName;
+    /* @internal */
+    // See GH#16030
+    function isAnyDeclarationName(name) {
+        switch (name.kind) {
+            case 71 /* Identifier */:
+            case 9 /* StringLiteral */:
+            case 8 /* NumericLiteral */:
+                if (ts.isDeclaration(name.parent)) {
+                    return name.parent.name === name;
+                }
+                var binExp = name.parent.parent;
+                return ts.isBinaryExpression(binExp) && getSpecialPropertyAssignmentKind(binExp) !== 0 /* None */ && ts.getNameOfDeclaration(binExp) === name;
+            default:
+                return false;
+        }
+    }
+    ts.isAnyDeclarationName = isAnyDeclarationName;
     function isLiteralComputedPropertyDeclarationName(node) {
         return (node.kind === 9 /* StringLiteral */ || node.kind === 8 /* NumericLiteral */) &&
-            node.parent.kind === 140 /* ComputedPropertyName */ &&
-            isDeclaration(node.parent.parent);
+            node.parent.kind === 144 /* ComputedPropertyName */ &&
+            ts.isDeclaration(node.parent.parent);
     }
     ts.isLiteralComputedPropertyDeclarationName = isLiteralComputedPropertyDeclarationName;
     // Return true if the given identifier is classified as an IdentifierName
     function isIdentifierName(node) {
         var parent = node.parent;
         switch (parent.kind) {
-            case 145 /* PropertyDeclaration */:
-            case 144 /* PropertySignature */:
-            case 147 /* MethodDeclaration */:
-            case 146 /* MethodSignature */:
-            case 149 /* GetAccessor */:
-            case 150 /* SetAccessor */:
-            case 255 /* EnumMember */:
-            case 253 /* PropertyAssignment */:
-            case 172 /* PropertyAccessExpression */:
+            case 149 /* PropertyDeclaration */:
+            case 148 /* PropertySignature */:
+            case 151 /* MethodDeclaration */:
+            case 150 /* MethodSignature */:
+            case 153 /* GetAccessor */:
+            case 154 /* SetAccessor */:
+            case 264 /* EnumMember */:
+            case 261 /* PropertyAssignment */:
+            case 179 /* PropertyAccessExpression */:
                 // Name in member declaration or property name in property access
                 return parent.name === node;
-            case 139 /* QualifiedName */:
+            case 143 /* QualifiedName */:
                 // Name on right hand side of dot in a type query
                 if (parent.right === node) {
-                    while (parent.kind === 139 /* QualifiedName */) {
+                    while (parent.kind === 143 /* QualifiedName */) {
                         parent = parent.parent;
                     }
-                    return parent.kind === 158 /* TypeQuery */;
+                    return parent.kind === 162 /* TypeQuery */;
                 }
                 return false;
-            case 169 /* BindingElement */:
-            case 234 /* ImportSpecifier */:
+            case 176 /* BindingElement */:
+            case 242 /* ImportSpecifier */:
                 // Property name in binding element or import specifier
                 return parent.propertyName === node;
-            case 238 /* ExportSpecifier */:
+            case 246 /* ExportSpecifier */:
                 // Any name in an export specifier
                 return true;
         }
@@ -5151,13 +5758,13 @@ var ts;
     // export = <EntityNameExpression>
     // export default <EntityNameExpression>
     function isAliasSymbolDeclaration(node) {
-        return node.kind === 229 /* ImportEqualsDeclaration */ ||
-            node.kind === 228 /* NamespaceExportDeclaration */ ||
-            node.kind === 231 /* ImportClause */ && !!node.name ||
-            node.kind === 232 /* NamespaceImport */ ||
-            node.kind === 234 /* ImportSpecifier */ ||
-            node.kind === 238 /* ExportSpecifier */ ||
-            node.kind === 235 /* ExportAssignment */ && exportAssignmentIsAlias(node);
+        return node.kind === 237 /* ImportEqualsDeclaration */ ||
+            node.kind === 236 /* NamespaceExportDeclaration */ ||
+            node.kind === 239 /* ImportClause */ && !!node.name ||
+            node.kind === 240 /* NamespaceImport */ ||
+            node.kind === 242 /* ImportSpecifier */ ||
+            node.kind === 246 /* ExportSpecifier */ ||
+            node.kind === 243 /* ExportAssignment */ && exportAssignmentIsAlias(node);
     }
     ts.isAliasSymbolDeclaration = isAliasSymbolDeclaration;
     function exportAssignmentIsAlias(node) {
@@ -5165,17 +5772,17 @@ var ts;
     }
     ts.exportAssignmentIsAlias = exportAssignmentIsAlias;
     function getClassExtendsHeritageClauseElement(node) {
-        var heritageClause = getHeritageClause(node.heritageClauses, 83 /* ExtendsKeyword */);
+        var heritageClause = getHeritageClause(node.heritageClauses, 85 /* ExtendsKeyword */);
         return heritageClause && heritageClause.types.length > 0 ? heritageClause.types[0] : undefined;
     }
     ts.getClassExtendsHeritageClauseElement = getClassExtendsHeritageClauseElement;
     function getClassImplementsHeritageClauseElements(node) {
-        var heritageClause = getHeritageClause(node.heritageClauses, 106 /* ImplementsKeyword */);
+        var heritageClause = getHeritageClause(node.heritageClauses, 108 /* ImplementsKeyword */);
         return heritageClause ? heritageClause.types : undefined;
     }
     ts.getClassImplementsHeritageClauseElements = getClassImplementsHeritageClauseElements;
     function getInterfaceBaseTypeNodes(node) {
-        var heritageClause = getHeritageClause(node.heritageClauses, 83 /* ExtendsKeyword */);
+        var heritageClause = getHeritageClause(node.heritageClauses, 85 /* ExtendsKeyword */);
         return heritageClause ? heritageClause.types : undefined;
     }
     ts.getInterfaceBaseTypeNodes = getInterfaceBaseTypeNodes;
@@ -5213,21 +5820,19 @@ var ts;
         var isNoDefaultLibRegEx = /^(\/\/\/\s*<reference\s+no-default-lib\s*=\s*)('|")(.+?)\2\s*\/>/gim;
         if (simpleReferenceRegEx.test(comment)) {
             if (isNoDefaultLibRegEx.test(comment)) {
-                return {
-                    isNoDefaultLib: true
-                };
+                return { isNoDefaultLib: true };
             }
             else {
                 var refMatchResult = ts.fullTripleSlashReferencePathRegEx.exec(comment);
                 var refLibResult = !refMatchResult && ts.fullTripleSlashReferenceTypeReferenceDirectiveRegEx.exec(comment);
-                if (refMatchResult || refLibResult) {
-                    var start = commentRange.pos;
-                    var end = commentRange.end;
+                var match = refMatchResult || refLibResult;
+                if (match) {
+                    var pos = commentRange.pos + match[1].length + match[2].length;
                     return {
                         fileReference: {
-                            pos: start,
-                            end: end,
-                            fileName: (refMatchResult || refLibResult)[3]
+                            pos: pos,
+                            end: pos + match[3].length,
+                            fileName: match[3]
                         },
                         isNoDefaultLib: false,
                         isTypeReferenceDirective: !!refLibResult
@@ -5243,19 +5848,63 @@ var ts;
     }
     ts.getFileReferenceFromReferencePath = getFileReferenceFromReferencePath;
     function isKeyword(token) {
-        return 70 /* FirstKeyword */ <= token && token <= 138 /* LastKeyword */;
+        return 72 /* FirstKeyword */ <= token && token <= 142 /* LastKeyword */;
     }
     ts.isKeyword = isKeyword;
     function isTrivia(token) {
         return 2 /* FirstTriviaToken */ <= token && token <= 7 /* LastTriviaToken */;
     }
     ts.isTrivia = isTrivia;
-    function isAsyncFunctionLike(node) {
-        return isFunctionLike(node) && hasModifier(node, 256 /* Async */) && !isAccessor(node);
+    var FunctionFlags;
+    (function (FunctionFlags) {
+        FunctionFlags[FunctionFlags["Normal"] = 0] = "Normal";
+        FunctionFlags[FunctionFlags["Generator"] = 1] = "Generator";
+        FunctionFlags[FunctionFlags["Async"] = 2] = "Async";
+        FunctionFlags[FunctionFlags["Invalid"] = 4] = "Invalid";
+        FunctionFlags[FunctionFlags["AsyncGenerator"] = 3] = "AsyncGenerator";
+    })(FunctionFlags = ts.FunctionFlags || (ts.FunctionFlags = {}));
+    function getFunctionFlags(node) {
+        if (!node) {
+            return 4 /* Invalid */;
+        }
+        var flags = 0 /* Normal */;
+        switch (node.kind) {
+            case 228 /* FunctionDeclaration */:
+            case 186 /* FunctionExpression */:
+            case 151 /* MethodDeclaration */:
+                if (node.asteriskToken) {
+                    flags |= 1 /* Generator */;
+                }
+            // falls through
+            case 187 /* ArrowFunction */:
+                if (hasModifier(node, 256 /* Async */)) {
+                    flags |= 2 /* Async */;
+                }
+                break;
+        }
+        if (!node.body) {
+            flags |= 4 /* Invalid */;
+        }
+        return flags;
     }
-    ts.isAsyncFunctionLike = isAsyncFunctionLike;
-    function isStringOrNumericLiteral(kind) {
-        return kind === 9 /* StringLiteral */ || kind === 8 /* NumericLiteral */;
+    ts.getFunctionFlags = getFunctionFlags;
+    function isAsyncFunction(node) {
+        switch (node.kind) {
+            case 228 /* FunctionDeclaration */:
+            case 186 /* FunctionExpression */:
+            case 187 /* ArrowFunction */:
+            case 151 /* MethodDeclaration */:
+                return node.body !== undefined
+                    && node.asteriskToken === undefined
+                    && hasModifier(node, 256 /* Async */);
+        }
+        return false;
+    }
+    ts.isAsyncFunction = isAsyncFunction;
+    function isStringOrNumericLiteral(node) {
+        var kind = node.kind;
+        return kind === 9 /* StringLiteral */
+            || kind === 8 /* NumericLiteral */;
     }
     ts.isStringOrNumericLiteral = isStringOrNumericLiteral;
     /**
@@ -5266,12 +5915,13 @@ var ts;
      *      Symbol.
      */
     function hasDynamicName(declaration) {
-        return declaration.name && isDynamicName(declaration.name);
+        var name = ts.getNameOfDeclaration(declaration);
+        return name && isDynamicName(name);
     }
     ts.hasDynamicName = hasDynamicName;
     function isDynamicName(name) {
-        return name.kind === 140 /* ComputedPropertyName */ &&
-            !isStringOrNumericLiteral(name.expression.kind) &&
+        return name.kind === 144 /* ComputedPropertyName */ &&
+            !isStringOrNumericLiteral(name.expression) &&
             !isWellKnownSymbolSyntactically(name.expression);
     }
     ts.isDynamicName = isDynamicName;
@@ -5281,14 +5931,14 @@ var ts;
      * where Symbol is literally the word "Symbol", and name is any identifierName
      */
     function isWellKnownSymbolSyntactically(node) {
-        return isPropertyAccessExpression(node) && isESSymbolIdentifier(node.expression);
+        return ts.isPropertyAccessExpression(node) && isESSymbolIdentifier(node.expression);
     }
     ts.isWellKnownSymbolSyntactically = isWellKnownSymbolSyntactically;
     function getPropertyNameForPropertyNameNode(name) {
-        if (name.kind === 69 /* Identifier */ || name.kind === 9 /* StringLiteral */ || name.kind === 8 /* NumericLiteral */ || name.kind === 142 /* Parameter */) {
+        if (name.kind === 71 /* Identifier */ || name.kind === 9 /* StringLiteral */ || name.kind === 8 /* NumericLiteral */ || name.kind === 146 /* Parameter */) {
             return name.text;
         }
-        if (name.kind === 140 /* ComputedPropertyName */) {
+        if (name.kind === 144 /* ComputedPropertyName */) {
             var nameExpression = name.expression;
             if (isWellKnownSymbolSyntactically(nameExpression)) {
                 var rightHandSideName = nameExpression.name.text;
@@ -5309,34 +5959,20 @@ var ts;
      * Includes the word "Symbol" with unicode escapes
      */
     function isESSymbolIdentifier(node) {
-        return node.kind === 69 /* Identifier */ && node.text === "Symbol";
+        return node.kind === 71 /* Identifier */ && node.text === "Symbol";
     }
     ts.isESSymbolIdentifier = isESSymbolIdentifier;
-    function isModifierKind(token) {
-        switch (token) {
-            case 115 /* AbstractKeyword */:
-            case 118 /* AsyncKeyword */:
-            case 74 /* ConstKeyword */:
-            case 122 /* DeclareKeyword */:
-            case 77 /* DefaultKeyword */:
-            case 82 /* ExportKeyword */:
-            case 112 /* PublicKeyword */:
-            case 110 /* PrivateKeyword */:
-            case 111 /* ProtectedKeyword */:
-            case 128 /* ReadonlyKeyword */:
-            case 113 /* StaticKeyword */:
-                return true;
-        }
-        return false;
+    function isPushOrUnshiftIdentifier(node) {
+        return node.text === "push" || node.text === "unshift";
     }
-    ts.isModifierKind = isModifierKind;
+    ts.isPushOrUnshiftIdentifier = isPushOrUnshiftIdentifier;
     function isParameterDeclaration(node) {
         var root = getRootDeclaration(node);
-        return root.kind === 142 /* Parameter */;
+        return root.kind === 146 /* Parameter */;
     }
     ts.isParameterDeclaration = isParameterDeclaration;
     function getRootDeclaration(node) {
-        while (node.kind === 169 /* BindingElement */) {
+        while (node.kind === 176 /* BindingElement */) {
             node = node.parent.parent;
         }
         return node;
@@ -5344,15 +5980,15 @@ var ts;
     ts.getRootDeclaration = getRootDeclaration;
     function nodeStartsNewLexicalEnvironment(node) {
         var kind = node.kind;
-        return kind === 148 /* Constructor */
-            || kind === 179 /* FunctionExpression */
-            || kind === 220 /* FunctionDeclaration */
-            || kind === 180 /* ArrowFunction */
-            || kind === 147 /* MethodDeclaration */
-            || kind === 149 /* GetAccessor */
-            || kind === 150 /* SetAccessor */
-            || kind === 225 /* ModuleDeclaration */
-            || kind === 256 /* SourceFile */;
+        return kind === 152 /* Constructor */
+            || kind === 186 /* FunctionExpression */
+            || kind === 228 /* FunctionDeclaration */
+            || kind === 187 /* ArrowFunction */
+            || kind === 151 /* MethodDeclaration */
+            || kind === 153 /* GetAccessor */
+            || kind === 154 /* SetAccessor */
+            || kind === 233 /* ModuleDeclaration */
+            || kind === 265 /* SourceFile */;
     }
     ts.nodeStartsNewLexicalEnvironment = nodeStartsNewLexicalEnvironment;
     function nodeIsSynthesized(node) {
@@ -5360,91 +5996,53 @@ var ts;
             || ts.positionIsSynthesized(node.end);
     }
     ts.nodeIsSynthesized = nodeIsSynthesized;
-    function getOriginalNode(node) {
-        if (node) {
-            while (node.original !== undefined) {
-                node = node.original;
-            }
-        }
-        return node;
+    function getOriginalSourceFile(sourceFile) {
+        return ts.getParseTreeNode(sourceFile, ts.isSourceFile) || sourceFile;
     }
-    ts.getOriginalNode = getOriginalNode;
-    /**
-     * Gets a value indicating whether a node originated in the parse tree.
-     *
-     * @param node The node to test.
-     */
-    function isParseTreeNode(node) {
-        return (node.flags & 8 /* Synthesized */) === 0;
-    }
-    ts.isParseTreeNode = isParseTreeNode;
-    function getParseTreeNode(node, nodeTest) {
-        if (isParseTreeNode(node)) {
-            return node;
-        }
-        node = getOriginalNode(node);
-        if (isParseTreeNode(node) && (!nodeTest || nodeTest(node))) {
-            return node;
-        }
-        return undefined;
-    }
-    ts.getParseTreeNode = getParseTreeNode;
+    ts.getOriginalSourceFile = getOriginalSourceFile;
     function getOriginalSourceFiles(sourceFiles) {
-        var originalSourceFiles = [];
-        for (var _i = 0, sourceFiles_1 = sourceFiles; _i < sourceFiles_1.length; _i++) {
-            var sourceFile = sourceFiles_1[_i];
-            var originalSourceFile = getParseTreeNode(sourceFile, isSourceFile);
-            if (originalSourceFile) {
-                originalSourceFiles.push(originalSourceFile);
-            }
-        }
-        return originalSourceFiles;
+        return ts.sameMap(sourceFiles, getOriginalSourceFile);
     }
     ts.getOriginalSourceFiles = getOriginalSourceFiles;
-    function getOriginalNodeId(node) {
-        node = getOriginalNode(node);
-        return node ? ts.getNodeId(node) : 0;
-    }
-    ts.getOriginalNodeId = getOriginalNodeId;
+    var Associativity;
     (function (Associativity) {
         Associativity[Associativity["Left"] = 0] = "Left";
         Associativity[Associativity["Right"] = 1] = "Right";
-    })(ts.Associativity || (ts.Associativity = {}));
-    var Associativity = ts.Associativity;
+    })(Associativity = ts.Associativity || (ts.Associativity = {}));
     function getExpressionAssociativity(expression) {
         var operator = getOperator(expression);
-        var hasArguments = expression.kind === 175 /* NewExpression */ && expression.arguments !== undefined;
+        var hasArguments = expression.kind === 182 /* NewExpression */ && expression.arguments !== undefined;
         return getOperatorAssociativity(expression.kind, operator, hasArguments);
     }
     ts.getExpressionAssociativity = getExpressionAssociativity;
     function getOperatorAssociativity(kind, operator, hasArguments) {
         switch (kind) {
-            case 175 /* NewExpression */:
+            case 182 /* NewExpression */:
                 return hasArguments ? 0 /* Left */ : 1 /* Right */;
-            case 185 /* PrefixUnaryExpression */:
-            case 182 /* TypeOfExpression */:
-            case 183 /* VoidExpression */:
-            case 181 /* DeleteExpression */:
-            case 184 /* AwaitExpression */:
-            case 188 /* ConditionalExpression */:
-            case 190 /* YieldExpression */:
+            case 192 /* PrefixUnaryExpression */:
+            case 189 /* TypeOfExpression */:
+            case 190 /* VoidExpression */:
+            case 188 /* DeleteExpression */:
+            case 191 /* AwaitExpression */:
+            case 195 /* ConditionalExpression */:
+            case 197 /* YieldExpression */:
                 return 1 /* Right */;
-            case 187 /* BinaryExpression */:
+            case 194 /* BinaryExpression */:
                 switch (operator) {
-                    case 38 /* AsteriskAsteriskToken */:
-                    case 56 /* EqualsToken */:
-                    case 57 /* PlusEqualsToken */:
-                    case 58 /* MinusEqualsToken */:
-                    case 60 /* AsteriskAsteriskEqualsToken */:
-                    case 59 /* AsteriskEqualsToken */:
-                    case 61 /* SlashEqualsToken */:
-                    case 62 /* PercentEqualsToken */:
-                    case 63 /* LessThanLessThanEqualsToken */:
-                    case 64 /* GreaterThanGreaterThanEqualsToken */:
-                    case 65 /* GreaterThanGreaterThanGreaterThanEqualsToken */:
-                    case 66 /* AmpersandEqualsToken */:
-                    case 68 /* CaretEqualsToken */:
-                    case 67 /* BarEqualsToken */:
+                    case 40 /* AsteriskAsteriskToken */:
+                    case 58 /* EqualsToken */:
+                    case 59 /* PlusEqualsToken */:
+                    case 60 /* MinusEqualsToken */:
+                    case 62 /* AsteriskAsteriskEqualsToken */:
+                    case 61 /* AsteriskEqualsToken */:
+                    case 63 /* SlashEqualsToken */:
+                    case 64 /* PercentEqualsToken */:
+                    case 65 /* LessThanLessThanEqualsToken */:
+                    case 66 /* GreaterThanGreaterThanEqualsToken */:
+                    case 67 /* GreaterThanGreaterThanGreaterThanEqualsToken */:
+                    case 68 /* AmpersandEqualsToken */:
+                    case 70 /* CaretEqualsToken */:
+                    case 69 /* BarEqualsToken */:
                         return 1 /* Right */;
                 }
         }
@@ -5453,15 +6051,15 @@ var ts;
     ts.getOperatorAssociativity = getOperatorAssociativity;
     function getExpressionPrecedence(expression) {
         var operator = getOperator(expression);
-        var hasArguments = expression.kind === 175 /* NewExpression */ && expression.arguments !== undefined;
+        var hasArguments = expression.kind === 182 /* NewExpression */ && expression.arguments !== undefined;
         return getOperatorPrecedence(expression.kind, operator, hasArguments);
     }
     ts.getExpressionPrecedence = getExpressionPrecedence;
     function getOperator(expression) {
-        if (expression.kind === 187 /* BinaryExpression */) {
+        if (expression.kind === 194 /* BinaryExpression */) {
             return expression.operatorToken.kind;
         }
-        else if (expression.kind === 185 /* PrefixUnaryExpression */ || expression.kind === 186 /* PostfixUnaryExpression */) {
+        else if (expression.kind === 192 /* PrefixUnaryExpression */ || expression.kind === 193 /* PostfixUnaryExpression */) {
             return expression.operator;
         }
         else {
@@ -5471,107 +6069,109 @@ var ts;
     ts.getOperator = getOperator;
     function getOperatorPrecedence(nodeKind, operatorKind, hasArguments) {
         switch (nodeKind) {
-            case 97 /* ThisKeyword */:
-            case 95 /* SuperKeyword */:
-            case 69 /* Identifier */:
-            case 93 /* NullKeyword */:
-            case 99 /* TrueKeyword */:
-            case 84 /* FalseKeyword */:
+            case 99 /* ThisKeyword */:
+            case 97 /* SuperKeyword */:
+            case 71 /* Identifier */:
+            case 95 /* NullKeyword */:
+            case 101 /* TrueKeyword */:
+            case 86 /* FalseKeyword */:
             case 8 /* NumericLiteral */:
             case 9 /* StringLiteral */:
-            case 170 /* ArrayLiteralExpression */:
-            case 171 /* ObjectLiteralExpression */:
-            case 179 /* FunctionExpression */:
-            case 180 /* ArrowFunction */:
-            case 192 /* ClassExpression */:
-            case 241 /* JsxElement */:
-            case 242 /* JsxSelfClosingElement */:
-            case 10 /* RegularExpressionLiteral */:
-            case 11 /* NoSubstitutionTemplateLiteral */:
-            case 189 /* TemplateExpression */:
-            case 178 /* ParenthesizedExpression */:
-            case 193 /* OmittedExpression */:
+            case 177 /* ArrayLiteralExpression */:
+            case 178 /* ObjectLiteralExpression */:
+            case 186 /* FunctionExpression */:
+            case 187 /* ArrowFunction */:
+            case 199 /* ClassExpression */:
+            case 249 /* JsxElement */:
+            case 250 /* JsxSelfClosingElement */:
+            case 12 /* RegularExpressionLiteral */:
+            case 13 /* NoSubstitutionTemplateLiteral */:
+            case 196 /* TemplateExpression */:
+            case 185 /* ParenthesizedExpression */:
+            case 200 /* OmittedExpression */:
                 return 19;
-            case 176 /* TaggedTemplateExpression */:
-            case 172 /* PropertyAccessExpression */:
-            case 173 /* ElementAccessExpression */:
+            case 183 /* TaggedTemplateExpression */:
+            case 179 /* PropertyAccessExpression */:
+            case 180 /* ElementAccessExpression */:
                 return 18;
-            case 175 /* NewExpression */:
+            case 182 /* NewExpression */:
                 return hasArguments ? 18 : 17;
-            case 174 /* CallExpression */:
+            case 181 /* CallExpression */:
                 return 17;
-            case 186 /* PostfixUnaryExpression */:
+            case 193 /* PostfixUnaryExpression */:
                 return 16;
-            case 185 /* PrefixUnaryExpression */:
-            case 182 /* TypeOfExpression */:
-            case 183 /* VoidExpression */:
-            case 181 /* DeleteExpression */:
-            case 184 /* AwaitExpression */:
+            case 192 /* PrefixUnaryExpression */:
+            case 189 /* TypeOfExpression */:
+            case 190 /* VoidExpression */:
+            case 188 /* DeleteExpression */:
+            case 191 /* AwaitExpression */:
                 return 15;
-            case 187 /* BinaryExpression */:
+            case 194 /* BinaryExpression */:
                 switch (operatorKind) {
-                    case 49 /* ExclamationToken */:
-                    case 50 /* TildeToken */:
+                    case 51 /* ExclamationToken */:
+                    case 52 /* TildeToken */:
                         return 15;
-                    case 38 /* AsteriskAsteriskToken */:
-                    case 37 /* AsteriskToken */:
-                    case 39 /* SlashToken */:
-                    case 40 /* PercentToken */:
+                    case 40 /* AsteriskAsteriskToken */:
+                    case 39 /* AsteriskToken */:
+                    case 41 /* SlashToken */:
+                    case 42 /* PercentToken */:
                         return 14;
-                    case 35 /* PlusToken */:
-                    case 36 /* MinusToken */:
+                    case 37 /* PlusToken */:
+                    case 38 /* MinusToken */:
                         return 13;
-                    case 43 /* LessThanLessThanToken */:
-                    case 44 /* GreaterThanGreaterThanToken */:
-                    case 45 /* GreaterThanGreaterThanGreaterThanToken */:
+                    case 45 /* LessThanLessThanToken */:
+                    case 46 /* GreaterThanGreaterThanToken */:
+                    case 47 /* GreaterThanGreaterThanGreaterThanToken */:
                         return 12;
-                    case 25 /* LessThanToken */:
-                    case 28 /* LessThanEqualsToken */:
-                    case 27 /* GreaterThanToken */:
-                    case 29 /* GreaterThanEqualsToken */:
-                    case 90 /* InKeyword */:
-                    case 91 /* InstanceOfKeyword */:
+                    case 27 /* LessThanToken */:
+                    case 30 /* LessThanEqualsToken */:
+                    case 29 /* GreaterThanToken */:
+                    case 31 /* GreaterThanEqualsToken */:
+                    case 92 /* InKeyword */:
+                    case 93 /* InstanceOfKeyword */:
                         return 11;
-                    case 30 /* EqualsEqualsToken */:
-                    case 32 /* EqualsEqualsEqualsToken */:
-                    case 31 /* ExclamationEqualsToken */:
-                    case 33 /* ExclamationEqualsEqualsToken */:
+                    case 32 /* EqualsEqualsToken */:
+                    case 34 /* EqualsEqualsEqualsToken */:
+                    case 33 /* ExclamationEqualsToken */:
+                    case 35 /* ExclamationEqualsEqualsToken */:
                         return 10;
-                    case 46 /* AmpersandToken */:
+                    case 48 /* AmpersandToken */:
                         return 9;
-                    case 48 /* CaretToken */:
+                    case 50 /* CaretToken */:
                         return 8;
-                    case 47 /* BarToken */:
+                    case 49 /* BarToken */:
                         return 7;
-                    case 51 /* AmpersandAmpersandToken */:
+                    case 53 /* AmpersandAmpersandToken */:
                         return 6;
-                    case 52 /* BarBarToken */:
+                    case 54 /* BarBarToken */:
                         return 5;
-                    case 56 /* EqualsToken */:
-                    case 57 /* PlusEqualsToken */:
-                    case 58 /* MinusEqualsToken */:
-                    case 60 /* AsteriskAsteriskEqualsToken */:
-                    case 59 /* AsteriskEqualsToken */:
-                    case 61 /* SlashEqualsToken */:
-                    case 62 /* PercentEqualsToken */:
-                    case 63 /* LessThanLessThanEqualsToken */:
-                    case 64 /* GreaterThanGreaterThanEqualsToken */:
-                    case 65 /* GreaterThanGreaterThanGreaterThanEqualsToken */:
-                    case 66 /* AmpersandEqualsToken */:
-                    case 68 /* CaretEqualsToken */:
-                    case 67 /* BarEqualsToken */:
+                    case 58 /* EqualsToken */:
+                    case 59 /* PlusEqualsToken */:
+                    case 60 /* MinusEqualsToken */:
+                    case 62 /* AsteriskAsteriskEqualsToken */:
+                    case 61 /* AsteriskEqualsToken */:
+                    case 63 /* SlashEqualsToken */:
+                    case 64 /* PercentEqualsToken */:
+                    case 65 /* LessThanLessThanEqualsToken */:
+                    case 66 /* GreaterThanGreaterThanEqualsToken */:
+                    case 67 /* GreaterThanGreaterThanGreaterThanEqualsToken */:
+                    case 68 /* AmpersandEqualsToken */:
+                    case 70 /* CaretEqualsToken */:
+                    case 69 /* BarEqualsToken */:
                         return 3;
-                    case 24 /* CommaToken */:
+                    case 26 /* CommaToken */:
                         return 0;
                     default:
                         return -1;
                 }
-            case 188 /* ConditionalExpression */:
+            case 195 /* ConditionalExpression */:
                 return 4;
-            case 190 /* YieldExpression */:
+            case 197 /* YieldExpression */:
                 return 2;
-            case 191 /* SpreadElementExpression */:
+            case 198 /* SpreadElement */:
                 return 1;
+            case 298 /* CommaListExpression */:
+                return 0;
             default:
                 return -1;
         }
@@ -5593,21 +6193,15 @@ var ts;
             return modificationCount;
         }
         function reattachFileDiagnostics(newFile) {
-            if (!ts.hasProperty(fileDiagnostics, newFile.fileName)) {
-                return;
-            }
-            for (var _i = 0, _a = fileDiagnostics[newFile.fileName]; _i < _a.length; _i++) {
-                var diagnostic = _a[_i];
-                diagnostic.file = newFile;
-            }
+            ts.forEach(fileDiagnostics.get(newFile.fileName), function (diagnostic) { return diagnostic.file = newFile; });
         }
         function add(diagnostic) {
             var diagnostics;
             if (diagnostic.file) {
-                diagnostics = fileDiagnostics[diagnostic.file.fileName];
+                diagnostics = fileDiagnostics.get(diagnostic.file.fileName);
                 if (!diagnostics) {
                     diagnostics = [];
-                    fileDiagnostics[diagnostic.file.fileName] = diagnostics;
+                    fileDiagnostics.set(diagnostic.file.fileName, diagnostics);
                 }
             }
             else {
@@ -5624,16 +6218,16 @@ var ts;
         function getDiagnostics(fileName) {
             sortAndDeduplicate();
             if (fileName) {
-                return fileDiagnostics[fileName] || [];
+                return fileDiagnostics.get(fileName) || [];
             }
             var allDiagnostics = [];
             function pushDiagnostic(d) {
                 allDiagnostics.push(d);
             }
             ts.forEach(nonFileDiagnostics, pushDiagnostic);
-            for (var key in fileDiagnostics) {
-                ts.forEach(fileDiagnostics[key], pushDiagnostic);
-            }
+            fileDiagnostics.forEach(function (diagnostics) {
+                ts.forEach(diagnostics, pushDiagnostic);
+            });
             return ts.sortAndDeduplicateDiagnostics(allDiagnostics);
         }
         function sortAndDeduplicate() {
@@ -5642,9 +6236,9 @@ var ts;
             }
             diagnosticsModified = false;
             nonFileDiagnostics = ts.sortAndDeduplicateDiagnostics(nonFileDiagnostics);
-            for (var key in fileDiagnostics) {
-                fileDiagnostics[key] = ts.sortAndDeduplicateDiagnostics(fileDiagnostics[key]);
-            }
+            fileDiagnostics.forEach(function (diagnostics, key) {
+                fileDiagnostics.set(key, ts.sortAndDeduplicateDiagnostics(diagnostics));
+            });
         }
     }
     ts.createDiagnosticCollection = createDiagnosticCollection;
@@ -5654,7 +6248,7 @@ var ts;
     // the map below must be updated. Note that this regexp *does not* include the 'delete' character.
     // There is no reason for this other than that JSON.stringify does not handle it either.
     var escapedCharsRegExp = /[\\\"\u0000-\u001f\t\v\f\b\r\n\u2028\u2029\u0085]/g;
-    var escapedCharsMap = ts.createMap({
+    var escapedCharsMap = ts.createMapFromTemplate({
         "\0": "\\0",
         "\t": "\\t",
         "\v": "\\v",
@@ -5674,13 +6268,12 @@ var ts;
      * Note that this doesn't actually wrap the input in double quotes.
      */
     function escapeString(s) {
-        s = escapedCharsRegExp.test(s) ? s.replace(escapedCharsRegExp, getReplacement) : s;
-        return s;
-        function getReplacement(c) {
-            return escapedCharsMap[c] || get16BitUnicodeEscapeSequence(c.charCodeAt(0));
-        }
+        return s.replace(escapedCharsRegExp, getReplacement);
     }
     ts.escapeString = escapeString;
+    function getReplacement(c) {
+        return escapedCharsMap.get(c) || get16BitUnicodeEscapeSequence(c.charCodeAt(0));
+    }
     function isIntrinsicJsxName(name) {
         var ch = name.substr(0, 1);
         return ch.toLowerCase() === ch;
@@ -5692,14 +6285,15 @@ var ts;
         return "\\u" + paddedHexCode;
     }
     var nonAsciiCharacters = /[^\u0000-\u007F]/g;
-    function escapeNonAsciiCharacters(s) {
+    function escapeNonAsciiString(s) {
+        s = escapeString(s);
         // Replace non-ASCII characters with '\uNNNN' escapes if any exist.
         // Otherwise just return the original string.
         return nonAsciiCharacters.test(s) ?
             s.replace(nonAsciiCharacters, function (c) { return get16BitUnicodeEscapeSequence(c.charCodeAt(0)); }) :
             s;
     }
-    ts.escapeNonAsciiCharacters = escapeNonAsciiCharacters;
+    ts.escapeNonAsciiString = escapeNonAsciiString;
     var indentStrings = ["", "    "];
     function getIndentString(level) {
         if (indentStrings[level] === undefined) {
@@ -5788,7 +6382,7 @@ var ts;
     ts.getResolvedExternalModuleName = getResolvedExternalModuleName;
     function getExternalModuleNameFromDeclaration(host, resolver, declaration) {
         var file = resolver.getExternalModuleFileFromDeclaration(declaration);
-        if (!file || isDeclarationFile(file)) {
+        if (!file || file.isDeclarationFile) {
             return undefined;
         }
         return getResolvedExternalModuleName(host, file);
@@ -5823,7 +6417,7 @@ var ts;
         var path = outputDir
             ? getSourceFilePathInNewDir(sourceFile, host, outputDir)
             : sourceFile.fileName;
-        return ts.removeFileExtension(path) + ".d.ts";
+        return ts.removeFileExtension(path) + ".d.ts" /* Dts */;
     }
     ts.getDeclarationEmitOutputFilePath = getDeclarationEmitOutputFilePath;
     /**
@@ -5837,154 +6431,26 @@ var ts;
      */
     function getSourceFilesToEmit(host, targetSourceFile) {
         var options = host.getCompilerOptions();
+        var isSourceFileFromExternalLibrary = function (file) { return host.isSourceFileFromExternalLibrary(file); };
         if (options.outFile || options.out) {
             var moduleKind = ts.getEmitModuleKind(options);
-            var moduleEmitEnabled = moduleKind === ts.ModuleKind.AMD || moduleKind === ts.ModuleKind.System;
-            var sourceFiles = host.getSourceFiles();
+            var moduleEmitEnabled_1 = moduleKind === ts.ModuleKind.AMD || moduleKind === ts.ModuleKind.System;
             // Can emit only sources that are not declaration file and are either non module code or module with --module or --target es6 specified
-            return ts.filter(sourceFiles, moduleEmitEnabled ? isNonDeclarationFile : isBundleEmitNonExternalModule);
+            return ts.filter(host.getSourceFiles(), function (sourceFile) {
+                return (moduleEmitEnabled_1 || !ts.isExternalModule(sourceFile)) && sourceFileMayBeEmitted(sourceFile, options, isSourceFileFromExternalLibrary);
+            });
         }
         else {
             var sourceFiles = targetSourceFile === undefined ? host.getSourceFiles() : [targetSourceFile];
-            return ts.filter(sourceFiles, isNonDeclarationFile);
+            return ts.filter(sourceFiles, function (sourceFile) { return sourceFileMayBeEmitted(sourceFile, options, isSourceFileFromExternalLibrary); });
         }
     }
     ts.getSourceFilesToEmit = getSourceFilesToEmit;
-    function isNonDeclarationFile(sourceFile) {
-        return !isDeclarationFile(sourceFile);
-    }
-    function isBundleEmitNonExternalModule(sourceFile) {
-        return !isDeclarationFile(sourceFile) && !ts.isExternalModule(sourceFile);
-    }
-    /**
-     * Iterates over each source file to emit. The source files are expected to have been
-     * transformed for use by the pretty printer.
-     *
-     * Originally part of `forEachExpectedEmitFile`, this functionality was extracted to support
-     * transformations.
-     *
-     * @param host An EmitHost.
-     * @param sourceFiles The transformed source files to emit.
-     * @param action The action to execute.
-     */
-    function forEachTransformedEmitFile(host, sourceFiles, action, emitOnlyDtsFiles) {
-        var options = host.getCompilerOptions();
-        // Emit on each source file
-        if (options.outFile || options.out) {
-            onBundledEmit(host, sourceFiles);
-        }
-        else {
-            for (var _i = 0, sourceFiles_2 = sourceFiles; _i < sourceFiles_2.length; _i++) {
-                var sourceFile = sourceFiles_2[_i];
-                // Don't emit if source file is a declaration file, or was located under node_modules
-                if (!isDeclarationFile(sourceFile) && !host.isSourceFileFromExternalLibrary(sourceFile)) {
-                    onSingleFileEmit(host, sourceFile);
-                }
-            }
-        }
-        function onSingleFileEmit(host, sourceFile) {
-            // JavaScript files are always LanguageVariant.JSX, as JSX syntax is allowed in .js files also.
-            // So for JavaScript files, '.jsx' is only emitted if the input was '.jsx', and JsxEmit.Preserve.
-            // For TypeScript, the only time to emit with a '.jsx' extension, is on JSX input, and JsxEmit.Preserve
-            var extension = ".js";
-            if (options.jsx === 1 /* Preserve */) {
-                if (isSourceFileJavaScript(sourceFile)) {
-                    if (ts.fileExtensionIs(sourceFile.fileName, ".jsx")) {
-                        extension = ".jsx";
-                    }
-                }
-                else if (sourceFile.languageVariant === 1 /* JSX */) {
-                    // TypeScript source file preserving JSX syntax
-                    extension = ".jsx";
-                }
-            }
-            var jsFilePath = getOwnEmitOutputFilePath(sourceFile, host, extension);
-            var sourceMapFilePath = getSourceMapFilePath(jsFilePath, options);
-            var declarationFilePath = !isSourceFileJavaScript(sourceFile) && (options.declaration || emitOnlyDtsFiles) ? getDeclarationEmitOutputFilePath(sourceFile, host) : undefined;
-            action(jsFilePath, sourceMapFilePath, declarationFilePath, [sourceFile], /*isBundledEmit*/ false);
-        }
-        function onBundledEmit(host, sourceFiles) {
-            if (sourceFiles.length) {
-                var jsFilePath = options.outFile || options.out;
-                var sourceMapFilePath = getSourceMapFilePath(jsFilePath, options);
-                var declarationFilePath = options.declaration ? ts.removeFileExtension(jsFilePath) + ".d.ts" : undefined;
-                action(jsFilePath, sourceMapFilePath, declarationFilePath, sourceFiles, /*isBundledEmit*/ true);
-            }
-        }
-    }
-    ts.forEachTransformedEmitFile = forEachTransformedEmitFile;
-    function getSourceMapFilePath(jsFilePath, options) {
-        return options.sourceMap ? jsFilePath + ".map" : undefined;
-    }
-    /**
-     * Iterates over the source files that are expected to have an emit output. This function
-     * is used by the legacy emitter and the declaration emitter and should not be used by
-     * the tree transforming emitter.
-     *
-     * @param host An EmitHost.
-     * @param action The action to execute.
-     * @param targetSourceFile An optional target source file to emit.
-     */
-    function forEachExpectedEmitFile(host, action, targetSourceFile, emitOnlyDtsFiles) {
-        var options = host.getCompilerOptions();
-        // Emit on each source file
-        if (options.outFile || options.out) {
-            onBundledEmit(host);
-        }
-        else {
-            var sourceFiles = targetSourceFile === undefined ? host.getSourceFiles() : [targetSourceFile];
-            for (var _i = 0, sourceFiles_3 = sourceFiles; _i < sourceFiles_3.length; _i++) {
-                var sourceFile = sourceFiles_3[_i];
-                // Don't emit if source file is a declaration file, or was located under node_modules
-                if (!isDeclarationFile(sourceFile) && !host.isSourceFileFromExternalLibrary(sourceFile)) {
-                    onSingleFileEmit(host, sourceFile);
-                }
-            }
-        }
-        function onSingleFileEmit(host, sourceFile) {
-            // JavaScript files are always LanguageVariant.JSX, as JSX syntax is allowed in .js files also.
-            // So for JavaScript files, '.jsx' is only emitted if the input was '.jsx', and JsxEmit.Preserve.
-            // For TypeScript, the only time to emit with a '.jsx' extension, is on JSX input, and JsxEmit.Preserve
-            var extension = ".js";
-            if (options.jsx === 1 /* Preserve */) {
-                if (isSourceFileJavaScript(sourceFile)) {
-                    if (ts.fileExtensionIs(sourceFile.fileName, ".jsx")) {
-                        extension = ".jsx";
-                    }
-                }
-                else if (sourceFile.languageVariant === 1 /* JSX */) {
-                    // TypeScript source file preserving JSX syntax
-                    extension = ".jsx";
-                }
-            }
-            var jsFilePath = getOwnEmitOutputFilePath(sourceFile, host, extension);
-            var declarationFilePath = !isSourceFileJavaScript(sourceFile) && (emitOnlyDtsFiles || options.declaration) ? getDeclarationEmitOutputFilePath(sourceFile, host) : undefined;
-            var emitFileNames = {
-                jsFilePath: jsFilePath,
-                sourceMapFilePath: getSourceMapFilePath(jsFilePath, options),
-                declarationFilePath: declarationFilePath
-            };
-            action(emitFileNames, [sourceFile], /*isBundledEmit*/ false, emitOnlyDtsFiles);
-        }
-        function onBundledEmit(host) {
-            // Can emit only sources that are not declaration file and are either non module code or module with
-            // --module or --target es6 specified. Files included by searching under node_modules are also not emitted.
-            var bundledSources = ts.filter(host.getSourceFiles(), function (sourceFile) { return !isDeclarationFile(sourceFile) &&
-                !host.isSourceFileFromExternalLibrary(sourceFile) &&
-                (!ts.isExternalModule(sourceFile) ||
-                    !!ts.getEmitModuleKind(options)); });
-            if (bundledSources.length) {
-                var jsFilePath = options.outFile || options.out;
-                var emitFileNames = {
-                    jsFilePath: jsFilePath,
-                    sourceMapFilePath: getSourceMapFilePath(jsFilePath, options),
-                    declarationFilePath: options.declaration ? ts.removeFileExtension(jsFilePath) + ".d.ts" : undefined
-                };
-                action(emitFileNames, bundledSources, /*isBundledEmit*/ true, emitOnlyDtsFiles);
-            }
-        }
+    /** Don't call this for `--outFile`, just for `--outDir` or plain emit. `--outFile` needs additional checks. */
+    function sourceFileMayBeEmitted(sourceFile, options, isSourceFileFromExternalLibrary) {
+        return !(options.noEmitForJsFiles && isSourceFileJavaScript(sourceFile)) && !sourceFile.isDeclarationFile && !isSourceFileFromExternalLibrary(sourceFile);
     }
-    ts.forEachExpectedEmitFile = forEachExpectedEmitFile;
+    ts.sourceFileMayBeEmitted = sourceFileMayBeEmitted;
     function getSourceFilePathInNewDir(sourceFile, host, newDirPath) {
         var sourceFilePath = ts.getNormalizedAbsolutePath(sourceFile.fileName, host.getCurrentDirectory());
         var commonSourceDirectory = host.getCommonSourceDirectory();
@@ -6009,21 +6475,45 @@ var ts;
     ts.getLineOfLocalPositionFromLineMap = getLineOfLocalPositionFromLineMap;
     function getFirstConstructorWithBody(node) {
         return ts.forEach(node.members, function (member) {
-            if (member.kind === 148 /* Constructor */ && nodeIsPresent(member.body)) {
+            if (member.kind === 152 /* Constructor */ && nodeIsPresent(member.body)) {
                 return member;
             }
         });
     }
     ts.getFirstConstructorWithBody = getFirstConstructorWithBody;
-    function getSetAccessorTypeAnnotationNode(accessor) {
+    function getSetAccessorValueParameter(accessor) {
         if (accessor && accessor.parameters.length > 0) {
-            var hasThis = accessor.parameters.length === 2 &&
-                accessor.parameters[0].name.kind === 69 /* Identifier */ &&
-                accessor.parameters[0].name.originalKeywordKind === 97 /* ThisKeyword */;
-            return accessor.parameters[hasThis ? 1 : 0].type;
+            var hasThis = accessor.parameters.length === 2 && parameterIsThisKeyword(accessor.parameters[0]);
+            return accessor.parameters[hasThis ? 1 : 0];
         }
     }
+    /** Get the type annotation for the value parameter. */
+    function getSetAccessorTypeAnnotationNode(accessor) {
+        var parameter = getSetAccessorValueParameter(accessor);
+        return parameter && parameter.type;
+    }
     ts.getSetAccessorTypeAnnotationNode = getSetAccessorTypeAnnotationNode;
+    function getThisParameter(signature) {
+        if (signature.parameters.length) {
+            var thisParameter = signature.parameters[0];
+            if (parameterIsThisKeyword(thisParameter)) {
+                return thisParameter;
+            }
+        }
+    }
+    ts.getThisParameter = getThisParameter;
+    function parameterIsThisKeyword(parameter) {
+        return isThisIdentifier(parameter.name);
+    }
+    ts.parameterIsThisKeyword = parameterIsThisKeyword;
+    function isThisIdentifier(node) {
+        return node && node.kind === 71 /* Identifier */ && identifierIsThisKeyword(node);
+    }
+    ts.isThisIdentifier = isThisIdentifier;
+    function identifierIsThisKeyword(id) {
+        return id.originalKeywordKind === 99 /* ThisKeyword */;
+    }
+    ts.identifierIsThisKeyword = identifierIsThisKeyword;
     function getAllAccessorDeclarations(declarations, accessor) {
         var firstAccessor;
         var secondAccessor;
@@ -6031,10 +6521,10 @@ var ts;
         var setAccessor;
         if (hasDynamicName(accessor)) {
             firstAccessor = accessor;
-            if (accessor.kind === 149 /* GetAccessor */) {
+            if (accessor.kind === 153 /* GetAccessor */) {
                 getAccessor = accessor;
             }
-            else if (accessor.kind === 150 /* SetAccessor */) {
+            else if (accessor.kind === 154 /* SetAccessor */) {
                 setAccessor = accessor;
             }
             else {
@@ -6043,7 +6533,7 @@ var ts;
         }
         else {
             ts.forEach(declarations, function (member) {
-                if ((member.kind === 149 /* GetAccessor */ || member.kind === 150 /* SetAccessor */)
+                if ((member.kind === 153 /* GetAccessor */ || member.kind === 154 /* SetAccessor */)
                     && hasModifier(member, 32 /* Static */) === hasModifier(accessor, 32 /* Static */)) {
                     var memberName = getPropertyNameForPropertyNameNode(member.name);
                     var accessorName = getPropertyNameForPropertyNameNode(accessor.name);
@@ -6054,10 +6544,10 @@ var ts;
                         else if (!secondAccessor) {
                             secondAccessor = member;
                         }
-                        if (member.kind === 149 /* GetAccessor */ && !getAccessor) {
+                        if (member.kind === 153 /* GetAccessor */ && !getAccessor) {
                             getAccessor = member;
                         }
-                        if (member.kind === 150 /* SetAccessor */ && !setAccessor) {
+                        if (member.kind === 154 /* SetAccessor */ && !setAccessor) {
                             setAccessor = member;
                         }
                     }
@@ -6072,6 +6562,55 @@ var ts;
         };
     }
     ts.getAllAccessorDeclarations = getAllAccessorDeclarations;
+    /**
+     * Gets the effective type annotation of a variable, parameter, or property. If the node was
+     * parsed in a JavaScript file, gets the type annotation from JSDoc.
+     */
+    function getEffectiveTypeAnnotationNode(node) {
+        if (node.type) {
+            return node.type;
+        }
+        if (node.flags & 65536 /* JavaScriptFile */) {
+            return getJSDocType(node);
+        }
+    }
+    ts.getEffectiveTypeAnnotationNode = getEffectiveTypeAnnotationNode;
+    /**
+     * Gets the effective return type annotation of a signature. If the node was parsed in a
+     * JavaScript file, gets the return type annotation from JSDoc.
+     */
+    function getEffectiveReturnTypeNode(node) {
+        if (node.type) {
+            return node.type;
+        }
+        if (node.flags & 65536 /* JavaScriptFile */) {
+            return getJSDocReturnType(node);
+        }
+    }
+    ts.getEffectiveReturnTypeNode = getEffectiveReturnTypeNode;
+    /**
+     * Gets the effective type parameters. If the node was parsed in a
+     * JavaScript file, gets the type parameters from the `@template` tag from JSDoc.
+     */
+    function getEffectiveTypeParameterDeclarations(node) {
+        if (node.typeParameters) {
+            return node.typeParameters;
+        }
+        if (node.flags & 65536 /* JavaScriptFile */) {
+            var templateTag = getJSDocTemplateTag(node);
+            return templateTag && templateTag.typeParameters;
+        }
+    }
+    ts.getEffectiveTypeParameterDeclarations = getEffectiveTypeParameterDeclarations;
+    /**
+     * Gets the effective type annotation of the value parameter of a set accessor. If the node
+     * was parsed in a JavaScript file, gets the type annotation from JSDoc.
+     */
+    function getEffectiveSetAccessorTypeAnnotationNode(node) {
+        var parameter = getSetAccessorValueParameter(node);
+        return parameter && getEffectiveTypeAnnotationNode(parameter);
+    }
+    ts.getEffectiveSetAccessorTypeAnnotationNode = getEffectiveSetAccessorTypeAnnotationNode;
     function emitNewLineBeforeLeadingComments(lineMap, writer, node, leadingComments) {
         emitNewLineBeforeLeadingCommentsOfPosition(lineMap, writer, node.pos, leadingComments);
     }
@@ -6277,6 +6816,13 @@ var ts;
         if (node.modifierFlagsCache & 536870912 /* HasComputedFlags */) {
             return node.modifierFlagsCache & ~536870912 /* HasComputedFlags */;
         }
+        var flags = getModifierFlagsNoCache(node);
+        node.modifierFlagsCache = flags | 536870912 /* HasComputedFlags */;
+        return flags;
+    }
+    ts.getModifierFlags = getModifierFlags;
+    /* @internal */
+    function getModifierFlagsNoCache(node) {
         var flags = 0 /* None */;
         if (node.modifiers) {
             for (var _i = 0, _a = node.modifiers; _i < _a.length; _i++) {
@@ -6284,56 +6830,61 @@ var ts;
                 flags |= modifierToFlag(modifier.kind);
             }
         }
-        if (node.flags & 4 /* NestedNamespace */) {
+        if (node.flags & 4 /* NestedNamespace */ || (node.kind === 71 /* Identifier */ && node.isInJSDocNamespace)) {
             flags |= 1 /* Export */;
         }
-        node.modifierFlagsCache = flags | 536870912 /* HasComputedFlags */;
         return flags;
     }
-    ts.getModifierFlags = getModifierFlags;
+    ts.getModifierFlagsNoCache = getModifierFlagsNoCache;
     function modifierToFlag(token) {
         switch (token) {
-            case 113 /* StaticKeyword */: return 32 /* Static */;
-            case 112 /* PublicKeyword */: return 4 /* Public */;
-            case 111 /* ProtectedKeyword */: return 16 /* Protected */;
-            case 110 /* PrivateKeyword */: return 8 /* Private */;
-            case 115 /* AbstractKeyword */: return 128 /* Abstract */;
-            case 82 /* ExportKeyword */: return 1 /* Export */;
-            case 122 /* DeclareKeyword */: return 2 /* Ambient */;
-            case 74 /* ConstKeyword */: return 2048 /* Const */;
-            case 77 /* DefaultKeyword */: return 512 /* Default */;
-            case 118 /* AsyncKeyword */: return 256 /* Async */;
-            case 128 /* ReadonlyKeyword */: return 64 /* Readonly */;
+            case 115 /* StaticKeyword */: return 32 /* Static */;
+            case 114 /* PublicKeyword */: return 4 /* Public */;
+            case 113 /* ProtectedKeyword */: return 16 /* Protected */;
+            case 112 /* PrivateKeyword */: return 8 /* Private */;
+            case 117 /* AbstractKeyword */: return 128 /* Abstract */;
+            case 84 /* ExportKeyword */: return 1 /* Export */;
+            case 124 /* DeclareKeyword */: return 2 /* Ambient */;
+            case 76 /* ConstKeyword */: return 2048 /* Const */;
+            case 79 /* DefaultKeyword */: return 512 /* Default */;
+            case 120 /* AsyncKeyword */: return 256 /* Async */;
+            case 131 /* ReadonlyKeyword */: return 64 /* Readonly */;
         }
         return 0 /* None */;
     }
     ts.modifierToFlag = modifierToFlag;
     function isLogicalOperator(token) {
-        return token === 52 /* BarBarToken */
-            || token === 51 /* AmpersandAmpersandToken */
-            || token === 49 /* ExclamationToken */;
+        return token === 54 /* BarBarToken */
+            || token === 53 /* AmpersandAmpersandToken */
+            || token === 51 /* ExclamationToken */;
     }
     ts.isLogicalOperator = isLogicalOperator;
     function isAssignmentOperator(token) {
-        return token >= 56 /* FirstAssignment */ && token <= 68 /* LastAssignment */;
+        return token >= 58 /* FirstAssignment */ && token <= 70 /* LastAssignment */;
     }
     ts.isAssignmentOperator = isAssignmentOperator;
     /** Get `C` given `N` if `N` is in the position `class C extends N` where `N` is an ExpressionWithTypeArguments. */
     function tryGetClassExtendingExpressionWithTypeArguments(node) {
-        if (node.kind === 194 /* ExpressionWithTypeArguments */ &&
-            node.parent.token === 83 /* ExtendsKeyword */ &&
-            isClassLike(node.parent.parent)) {
+        if (node.kind === 201 /* ExpressionWithTypeArguments */ &&
+            node.parent.token === 85 /* ExtendsKeyword */ &&
+            ts.isClassLike(node.parent.parent)) {
             return node.parent.parent;
         }
     }
     ts.tryGetClassExtendingExpressionWithTypeArguments = tryGetClassExtendingExpressionWithTypeArguments;
+    function isAssignmentExpression(node, excludeCompoundAssignment) {
+        return ts.isBinaryExpression(node)
+            && (excludeCompoundAssignment
+                ? node.operatorToken.kind === 58 /* EqualsToken */
+                : isAssignmentOperator(node.operatorToken.kind))
+            && ts.isLeftHandSideExpression(node.left);
+    }
+    ts.isAssignmentExpression = isAssignmentExpression;
     function isDestructuringAssignment(node) {
-        if (isBinaryExpression(node)) {
-            if (node.operatorToken.kind === 56 /* EqualsToken */) {
-                var kind = node.left.kind;
-                return kind === 171 /* ObjectLiteralExpression */
-                    || kind === 170 /* ArrayLiteralExpression */;
-            }
+        if (isAssignmentExpression(node, /*excludeCompoundAssignment*/ true)) {
+            var kind = node.left.kind;
+            return kind === 178 /* ObjectLiteralExpression */
+                || kind === 177 /* ArrayLiteralExpression */;
         }
         return false;
     }
@@ -6345,10 +6896,10 @@ var ts;
     }
     ts.isSupportedExpressionWithTypeArguments = isSupportedExpressionWithTypeArguments;
     function isSupportedExpressionWithTypeArgumentsRest(node) {
-        if (node.kind === 69 /* Identifier */) {
+        if (node.kind === 71 /* Identifier */) {
             return true;
         }
-        else if (isPropertyAccessExpression(node)) {
+        else if (ts.isPropertyAccessExpression(node)) {
             return isSupportedExpressionWithTypeArgumentsRest(node.expression);
         }
         else {
@@ -6359,31 +6910,42 @@ var ts;
         return tryGetClassExtendingExpressionWithTypeArguments(node) !== undefined;
     }
     ts.isExpressionWithTypeArgumentsInClassExtendsClause = isExpressionWithTypeArgumentsInClassExtendsClause;
+    function isExpressionWithTypeArgumentsInClassImplementsClause(node) {
+        return node.kind === 201 /* ExpressionWithTypeArguments */
+            && isEntityNameExpression(node.expression)
+            && node.parent
+            && node.parent.token === 108 /* ImplementsKeyword */
+            && node.parent.parent
+            && ts.isClassLike(node.parent.parent);
+    }
+    ts.isExpressionWithTypeArgumentsInClassImplementsClause = isExpressionWithTypeArgumentsInClassImplementsClause;
     function isEntityNameExpression(node) {
-        return node.kind === 69 /* Identifier */ ||
-            node.kind === 172 /* PropertyAccessExpression */ && isEntityNameExpression(node.expression);
+        return node.kind === 71 /* Identifier */ ||
+            node.kind === 179 /* PropertyAccessExpression */ && isEntityNameExpression(node.expression);
     }
     ts.isEntityNameExpression = isEntityNameExpression;
     function isRightSideOfQualifiedNameOrPropertyAccess(node) {
-        return (node.parent.kind === 139 /* QualifiedName */ && node.parent.right === node) ||
-            (node.parent.kind === 172 /* PropertyAccessExpression */ && node.parent.name === node);
+        return (node.parent.kind === 143 /* QualifiedName */ && node.parent.right === node) ||
+            (node.parent.kind === 179 /* PropertyAccessExpression */ && node.parent.name === node);
     }
     ts.isRightSideOfQualifiedNameOrPropertyAccess = isRightSideOfQualifiedNameOrPropertyAccess;
-    function isEmptyObjectLiteralOrArrayLiteral(expression) {
-        var kind = expression.kind;
-        if (kind === 171 /* ObjectLiteralExpression */) {
-            return expression.properties.length === 0;
-        }
-        if (kind === 170 /* ArrayLiteralExpression */) {
-            return expression.elements.length === 0;
-        }
-        return false;
+    function isEmptyObjectLiteral(expression) {
+        return expression.kind === 178 /* ObjectLiteralExpression */ &&
+            expression.properties.length === 0;
     }
-    ts.isEmptyObjectLiteralOrArrayLiteral = isEmptyObjectLiteralOrArrayLiteral;
+    ts.isEmptyObjectLiteral = isEmptyObjectLiteral;
+    function isEmptyArrayLiteral(expression) {
+        return expression.kind === 177 /* ArrayLiteralExpression */ &&
+            expression.elements.length === 0;
+    }
+    ts.isEmptyArrayLiteral = isEmptyArrayLiteral;
     function getLocalSymbolForExportDefault(symbol) {
-        return symbol && symbol.valueDeclaration && hasModifier(symbol.valueDeclaration, 512 /* Default */) ? symbol.valueDeclaration.localSymbol : undefined;
+        return isExportDefaultSymbol(symbol) ? symbol.declarations[0].localSymbol : undefined;
     }
     ts.getLocalSymbolForExportDefault = getLocalSymbolForExportDefault;
+    function isExportDefaultSymbol(symbol) {
+        return symbol && ts.length(symbol.declarations) > 0 && hasModifier(symbol.declarations[0], 512 /* Default */);
+    }
     /** Return ".ts", ".d.ts", or ".tsx", if that is the extension. */
     function tryExtractTypeScriptExtension(fileName) {
         return ts.find(ts.supportedTypescriptExtensionsForExtractExtension, function (extension) { return ts.fileExtensionIs(fileName, extension); });
@@ -6423,47 +6985,6 @@ var ts;
         }
         return output;
     }
-    /**
-     * Serialize an object graph into a JSON string. This is intended only for use on an acyclic graph
-     * as the fallback implementation does not check for circular references by default.
-     */
-    ts.stringify = typeof JSON !== "undefined" && JSON.stringify
-        ? JSON.stringify
-        : stringifyFallback;
-    /**
-     * Serialize an object graph into a JSON string.
-     */
-    function stringifyFallback(value) {
-        // JSON.stringify returns `undefined` here, instead of the string "undefined".
-        return value === undefined ? undefined : stringifyValue(value);
-    }
-    function stringifyValue(value) {
-        return typeof value === "string" ? "\"" + escapeString(value) + "\""
-            : typeof value === "number" ? isFinite(value) ? String(value) : "null"
-                : typeof value === "boolean" ? value ? "true" : "false"
-                    : typeof value === "object" && value ? ts.isArray(value) ? cycleCheck(stringifyArray, value) : cycleCheck(stringifyObject, value)
-                        : "null";
-    }
-    function cycleCheck(cb, value) {
-        ts.Debug.assert(!value.hasOwnProperty("__cycle"), "Converting circular structure to JSON");
-        value.__cycle = true;
-        var result = cb(value);
-        delete value.__cycle;
-        return result;
-    }
-    function stringifyArray(value) {
-        return "[" + ts.reduceLeft(value, stringifyElement, "") + "]";
-    }
-    function stringifyElement(memo, value) {
-        return (memo ? memo + "," : memo) + stringifyValue(value);
-    }
-    function stringifyObject(value) {
-        return "{" + ts.reduceOwnProperties(value, stringifyProperty, "") + "}";
-    }
-    function stringifyProperty(memo, value, key) {
-        return value === undefined || typeof value === "function" || key === "__cycle" ? memo
-            : (memo ? memo + "," : memo) + ("\"" + escapeString(key) + "\":" + stringifyValue(value));
-    }
     var base64Digits = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
     /**
      * Converts a string to a base-64 encoded ASCII string.
@@ -6499,13 +7020,13 @@ var ts;
     var carriageReturnLineFeed = "\r\n";
     var lineFeed = "\n";
     function getNewLineCharacter(options) {
-        if (options.newLine === 0 /* CarriageReturnLineFeed */) {
-            return carriageReturnLineFeed;
-        }
-        else if (options.newLine === 1 /* LineFeed */) {
-            return lineFeed;
+        switch (options.newLine) {
+            case 0 /* CarriageReturnLineFeed */:
+                return carriageReturnLineFeed;
+            case 1 /* LineFeed */:
+                return lineFeed;
         }
-        else if (ts.sys) {
+        if (ts.sys) {
             return ts.sys.newLine;
         }
         return carriageReturnLineFeed;
@@ -6526,49 +7047,49 @@ var ts;
             var kind = node.kind;
             if (kind === 9 /* StringLiteral */
                 || kind === 8 /* NumericLiteral */
-                || kind === 10 /* RegularExpressionLiteral */
-                || kind === 11 /* NoSubstitutionTemplateLiteral */
-                || kind === 69 /* Identifier */
-                || kind === 97 /* ThisKeyword */
-                || kind === 95 /* SuperKeyword */
-                || kind === 99 /* TrueKeyword */
-                || kind === 84 /* FalseKeyword */
-                || kind === 93 /* NullKeyword */) {
+                || kind === 12 /* RegularExpressionLiteral */
+                || kind === 13 /* NoSubstitutionTemplateLiteral */
+                || kind === 71 /* Identifier */
+                || kind === 99 /* ThisKeyword */
+                || kind === 97 /* SuperKeyword */
+                || kind === 101 /* TrueKeyword */
+                || kind === 86 /* FalseKeyword */
+                || kind === 95 /* NullKeyword */) {
                 return true;
             }
-            else if (kind === 172 /* PropertyAccessExpression */) {
+            else if (kind === 179 /* PropertyAccessExpression */) {
                 return isSimpleExpressionWorker(node.expression, depth + 1);
             }
-            else if (kind === 173 /* ElementAccessExpression */) {
+            else if (kind === 180 /* ElementAccessExpression */) {
                 return isSimpleExpressionWorker(node.expression, depth + 1)
                     && isSimpleExpressionWorker(node.argumentExpression, depth + 1);
             }
-            else if (kind === 185 /* PrefixUnaryExpression */
-                || kind === 186 /* PostfixUnaryExpression */) {
+            else if (kind === 192 /* PrefixUnaryExpression */
+                || kind === 193 /* PostfixUnaryExpression */) {
                 return isSimpleExpressionWorker(node.operand, depth + 1);
             }
-            else if (kind === 187 /* BinaryExpression */) {
-                return node.operatorToken.kind !== 38 /* AsteriskAsteriskToken */
+            else if (kind === 194 /* BinaryExpression */) {
+                return node.operatorToken.kind !== 40 /* AsteriskAsteriskToken */
                     && isSimpleExpressionWorker(node.left, depth + 1)
                     && isSimpleExpressionWorker(node.right, depth + 1);
             }
-            else if (kind === 188 /* ConditionalExpression */) {
+            else if (kind === 195 /* ConditionalExpression */) {
                 return isSimpleExpressionWorker(node.condition, depth + 1)
                     && isSimpleExpressionWorker(node.whenTrue, depth + 1)
                     && isSimpleExpressionWorker(node.whenFalse, depth + 1);
             }
-            else if (kind === 183 /* VoidExpression */
-                || kind === 182 /* TypeOfExpression */
-                || kind === 181 /* DeleteExpression */) {
+            else if (kind === 190 /* VoidExpression */
+                || kind === 189 /* TypeOfExpression */
+                || kind === 188 /* DeleteExpression */) {
                 return isSimpleExpressionWorker(node.expression, depth + 1);
             }
-            else if (kind === 170 /* ArrayLiteralExpression */) {
+            else if (kind === 177 /* ArrayLiteralExpression */) {
                 return node.elements.length === 0;
             }
-            else if (kind === 171 /* ObjectLiteralExpression */) {
+            else if (kind === 178 /* ObjectLiteralExpression */) {
                 return node.properties.length === 0;
             }
-            else if (kind === 174 /* CallExpression */) {
+            else if (kind === 181 /* CallExpression */) {
                 if (!isSimpleExpressionWorker(node.expression, depth + 1)) {
                     return false;
                 }
@@ -6583,24 +7104,85 @@ var ts;
         }
         return false;
     }
-    var syntaxKindCache = ts.createMap();
-    function formatSyntaxKind(kind) {
-        var syntaxKindEnum = ts.SyntaxKind;
-        if (syntaxKindEnum) {
-            if (syntaxKindCache[kind]) {
-                return syntaxKindCache[kind];
-            }
-            for (var name_6 in syntaxKindEnum) {
-                if (syntaxKindEnum[name_6] === kind) {
-                    return syntaxKindCache[kind] = kind.toString() + " (" + name_6 + ")";
+    /**
+     * Formats an enum value as a string for debugging and debug assertions.
+     */
+    function formatEnum(value, enumObject, isFlags) {
+        if (value === void 0) { value = 0; }
+        var members = getEnumMembers(enumObject);
+        if (value === 0) {
+            return members.length > 0 && members[0][0] === 0 ? members[0][1] : "0";
+        }
+        if (isFlags) {
+            var result = "";
+            var remainingFlags = value;
+            for (var i = members.length - 1; i >= 0 && remainingFlags !== 0; i--) {
+                var _a = members[i], enumValue = _a[0], enumName = _a[1];
+                if (enumValue !== 0 && (remainingFlags & enumValue) === enumValue) {
+                    remainingFlags &= ~enumValue;
+                    result = "" + enumName + (result ? ", " : "") + result;
                 }
             }
+            if (remainingFlags === 0) {
+                return result;
+            }
         }
         else {
-            return kind.toString();
+            for (var _i = 0, members_1 = members; _i < members_1.length; _i++) {
+                var _b = members_1[_i], enumValue = _b[0], enumName = _b[1];
+                if (enumValue === value) {
+                    return enumName;
+                }
+            }
         }
+        return value.toString();
+    }
+    function getEnumMembers(enumObject) {
+        var result = [];
+        for (var name_6 in enumObject) {
+            var value = enumObject[name_6];
+            if (typeof value === "number") {
+                result.push([value, name_6]);
+            }
+        }
+        return ts.stableSort(result, function (x, y) { return ts.compareValues(x[0], y[0]); });
+    }
+    function formatSyntaxKind(kind) {
+        return formatEnum(kind, ts.SyntaxKind, /*isFlags*/ false);
     }
     ts.formatSyntaxKind = formatSyntaxKind;
+    function formatModifierFlags(flags) {
+        return formatEnum(flags, ts.ModifierFlags, /*isFlags*/ true);
+    }
+    ts.formatModifierFlags = formatModifierFlags;
+    function formatTransformFlags(flags) {
+        return formatEnum(flags, ts.TransformFlags, /*isFlags*/ true);
+    }
+    ts.formatTransformFlags = formatTransformFlags;
+    function formatEmitFlags(flags) {
+        return formatEnum(flags, ts.EmitFlags, /*isFlags*/ true);
+    }
+    ts.formatEmitFlags = formatEmitFlags;
+    function formatSymbolFlags(flags) {
+        return formatEnum(flags, ts.SymbolFlags, /*isFlags*/ true);
+    }
+    ts.formatSymbolFlags = formatSymbolFlags;
+    function formatTypeFlags(flags) {
+        return formatEnum(flags, ts.TypeFlags, /*isFlags*/ true);
+    }
+    ts.formatTypeFlags = formatTypeFlags;
+    function formatObjectFlags(flags) {
+        return formatEnum(flags, ts.ObjectFlags, /*isFlags*/ true);
+    }
+    ts.formatObjectFlags = formatObjectFlags;
+    function getRangePos(range) {
+        return range ? range.pos : -1;
+    }
+    ts.getRangePos = getRangePos;
+    function getRangeEnd(range) {
+        return range ? range.end : -1;
+    }
+    ts.getRangeEnd = getRangeEnd;
     /**
      * Increases (or decreases) a position by the provided amount.
      *
@@ -6727,64 +7309,22 @@ var ts;
         return ts.positionIsSynthesized(range.pos) ? -1 : ts.skipTrivia(sourceFile.text, range.pos);
     }
     ts.getStartPositionOfRange = getStartPositionOfRange;
-    function collectExternalModuleInfo(sourceFile, resolver) {
-        var externalImports = [];
-        var exportSpecifiers = ts.createMap();
-        var exportEquals = undefined;
-        var hasExportStarsToExportValues = false;
-        for (var _i = 0, _a = sourceFile.statements; _i < _a.length; _i++) {
-            var node = _a[_i];
-            switch (node.kind) {
-                case 230 /* ImportDeclaration */:
-                    if (!node.importClause ||
-                        resolver.isReferencedAliasDeclaration(node.importClause, /*checkChildren*/ true)) {
-                        // import "mod"
-                        // import x from "mod" where x is referenced
-                        // import * as x from "mod" where x is referenced
-                        // import { x, y } from "mod" where at least one import is referenced
-                        externalImports.push(node);
-                    }
-                    break;
-                case 229 /* ImportEqualsDeclaration */:
-                    if (node.moduleReference.kind === 240 /* ExternalModuleReference */ && resolver.isReferencedAliasDeclaration(node)) {
-                        // import x = require("mod") where x is referenced
-                        externalImports.push(node);
-                    }
-                    break;
-                case 236 /* ExportDeclaration */:
-                    if (node.moduleSpecifier) {
-                        if (!node.exportClause) {
-                            // export * from "mod"
-                            if (resolver.moduleExportsSomeValue(node.moduleSpecifier)) {
-                                externalImports.push(node);
-                                hasExportStarsToExportValues = true;
-                            }
-                        }
-                        else if (resolver.isValueAliasDeclaration(node)) {
-                            // export { x, y } from "mod" where at least one export is a value symbol
-                            externalImports.push(node);
-                        }
-                    }
-                    else {
-                        // export { x, y }
-                        for (var _b = 0, _c = node.exportClause.elements; _b < _c.length; _b++) {
-                            var specifier = _c[_b];
-                            var name_7 = (specifier.propertyName || specifier.name).text;
-                            (exportSpecifiers[name_7] || (exportSpecifiers[name_7] = [])).push(specifier);
-                        }
-                    }
-                    break;
-                case 235 /* ExportAssignment */:
-                    if (node.isExportEquals && !exportEquals) {
-                        // export = x
-                        exportEquals = node;
-                    }
-                    break;
+    /**
+     * Determines whether a name was originally the declaration name of an enum or namespace
+     * declaration.
+     */
+    function isDeclarationNameOfEnumOrNamespace(node) {
+        var parseNode = ts.getParseTreeNode(node);
+        if (parseNode) {
+            switch (parseNode.parent.kind) {
+                case 232 /* EnumDeclaration */:
+                case 233 /* ModuleDeclaration */:
+                    return parseNode === parseNode.parent.name;
             }
         }
-        return { externalImports: externalImports, exportSpecifiers: exportSpecifiers, exportEquals: exportEquals, hasExportStarsToExportValues: hasExportStarsToExportValues };
+        return false;
     }
-    ts.collectExternalModuleInfo = collectExternalModuleInfo;
+    ts.isDeclarationNameOfEnumOrNamespace = isDeclarationNameOfEnumOrNamespace;
     function getInitializedVariables(node) {
         return ts.filter(node.declarations, isInitializedVariable);
     }
@@ -6799,7 +7339,7 @@ var ts;
         if (node.symbol) {
             for (var _i = 0, _a = node.symbol.declarations; _i < _a.length; _i++) {
                 var declaration = _a[_i];
-                if (declaration.kind === 221 /* ClassDeclaration */ && declaration !== node) {
+                if (declaration.kind === 229 /* ClassDeclaration */ && declaration !== node) {
                     return true;
                 }
             }
@@ -6817,551 +7357,69 @@ var ts;
         return node.symbol && getDeclarationOfKind(node.symbol, kind) === node;
     }
     ts.isFirstDeclarationOfKind = isFirstDeclarationOfKind;
-    // Node tests
-    //
-    // All node tests in the following list should *not* reference parent pointers so that
-    // they may be used with transformations.
-    // Node Arrays
-    function isNodeArray(array) {
-        return array.hasOwnProperty("pos")
-            && array.hasOwnProperty("end");
-    }
-    ts.isNodeArray = isNodeArray;
-    // Literals
-    function isNoSubstitutionTemplateLiteral(node) {
-        return node.kind === 11 /* NoSubstitutionTemplateLiteral */;
-    }
-    ts.isNoSubstitutionTemplateLiteral = isNoSubstitutionTemplateLiteral;
-    function isLiteralKind(kind) {
-        return 8 /* FirstLiteralToken */ <= kind && kind <= 11 /* LastLiteralToken */;
-    }
-    ts.isLiteralKind = isLiteralKind;
-    function isTextualLiteralKind(kind) {
-        return kind === 9 /* StringLiteral */ || kind === 11 /* NoSubstitutionTemplateLiteral */;
-    }
-    ts.isTextualLiteralKind = isTextualLiteralKind;
-    function isLiteralExpression(node) {
-        return isLiteralKind(node.kind);
-    }
-    ts.isLiteralExpression = isLiteralExpression;
-    // Pseudo-literals
-    function isTemplateLiteralKind(kind) {
-        return 11 /* FirstTemplateToken */ <= kind && kind <= 14 /* LastTemplateToken */;
-    }
-    ts.isTemplateLiteralKind = isTemplateLiteralKind;
-    function isTemplateLiteralFragmentKind(kind) {
-        return kind === 12 /* TemplateHead */
-            || kind === 13 /* TemplateMiddle */
-            || kind === 14 /* TemplateTail */;
-    }
-    function isTemplateLiteralFragment(node) {
-        return isTemplateLiteralFragmentKind(node.kind);
-    }
-    ts.isTemplateLiteralFragment = isTemplateLiteralFragment;
-    // Identifiers
-    function isIdentifier(node) {
-        return node.kind === 69 /* Identifier */;
-    }
-    ts.isIdentifier = isIdentifier;
-    function isGeneratedIdentifier(node) {
-        // Using `>` here catches both `GeneratedIdentifierKind.None` and `undefined`.
-        return isIdentifier(node) && node.autoGenerateKind > 0 /* None */;
-    }
-    ts.isGeneratedIdentifier = isGeneratedIdentifier;
-    // Keywords
-    function isModifier(node) {
-        return isModifierKind(node.kind);
-    }
-    ts.isModifier = isModifier;
-    // Names
-    function isQualifiedName(node) {
-        return node.kind === 139 /* QualifiedName */;
-    }
-    ts.isQualifiedName = isQualifiedName;
-    function isComputedPropertyName(node) {
-        return node.kind === 140 /* ComputedPropertyName */;
-    }
-    ts.isComputedPropertyName = isComputedPropertyName;
-    function isEntityName(node) {
-        var kind = node.kind;
-        return kind === 139 /* QualifiedName */
-            || kind === 69 /* Identifier */;
-    }
-    ts.isEntityName = isEntityName;
-    function isPropertyName(node) {
-        var kind = node.kind;
-        return kind === 69 /* Identifier */
-            || kind === 9 /* StringLiteral */
-            || kind === 8 /* NumericLiteral */
-            || kind === 140 /* ComputedPropertyName */;
-    }
-    ts.isPropertyName = isPropertyName;
-    function isModuleName(node) {
-        var kind = node.kind;
-        return kind === 69 /* Identifier */
-            || kind === 9 /* StringLiteral */;
-    }
-    ts.isModuleName = isModuleName;
-    function isBindingName(node) {
-        var kind = node.kind;
-        return kind === 69 /* Identifier */
-            || kind === 167 /* ObjectBindingPattern */
-            || kind === 168 /* ArrayBindingPattern */;
-    }
-    ts.isBindingName = isBindingName;
-    // Signature elements
-    function isTypeParameter(node) {
-        return node.kind === 141 /* TypeParameter */;
-    }
-    ts.isTypeParameter = isTypeParameter;
-    function isParameter(node) {
-        return node.kind === 142 /* Parameter */;
-    }
-    ts.isParameter = isParameter;
-    function isDecorator(node) {
-        return node.kind === 143 /* Decorator */;
-    }
-    ts.isDecorator = isDecorator;
-    // Type members
-    function isMethodDeclaration(node) {
-        return node.kind === 147 /* MethodDeclaration */;
-    }
-    ts.isMethodDeclaration = isMethodDeclaration;
-    function isClassElement(node) {
-        var kind = node.kind;
-        return kind === 148 /* Constructor */
-            || kind === 145 /* PropertyDeclaration */
-            || kind === 147 /* MethodDeclaration */
-            || kind === 149 /* GetAccessor */
-            || kind === 150 /* SetAccessor */
-            || kind === 153 /* IndexSignature */
-            || kind === 198 /* SemicolonClassElement */;
-    }
-    ts.isClassElement = isClassElement;
-    function isObjectLiteralElementLike(node) {
-        var kind = node.kind;
-        return kind === 253 /* PropertyAssignment */
-            || kind === 254 /* ShorthandPropertyAssignment */
-            || kind === 147 /* MethodDeclaration */
-            || kind === 149 /* GetAccessor */
-            || kind === 150 /* SetAccessor */
-            || kind === 239 /* MissingDeclaration */;
-    }
-    ts.isObjectLiteralElementLike = isObjectLiteralElementLike;
-    // Type
-    function isTypeNodeKind(kind) {
-        return (kind >= 154 /* FirstTypeNode */ && kind <= 166 /* LastTypeNode */)
-            || kind === 117 /* AnyKeyword */
-            || kind === 130 /* NumberKeyword */
-            || kind === 120 /* BooleanKeyword */
-            || kind === 132 /* StringKeyword */
-            || kind === 133 /* SymbolKeyword */
-            || kind === 103 /* VoidKeyword */
-            || kind === 127 /* NeverKeyword */
-            || kind === 194 /* ExpressionWithTypeArguments */;
-    }
-    /**
-     * Node test that determines whether a node is a valid type node.
-     * This differs from the `isPartOfTypeNode` function which determines whether a node is *part*
-     * of a TypeNode.
-     */
-    function isTypeNode(node) {
-        return isTypeNodeKind(node.kind);
-    }
-    ts.isTypeNode = isTypeNode;
-    // Binding patterns
-    function isBindingPattern(node) {
-        if (node) {
-            var kind = node.kind;
-            return kind === 168 /* ArrayBindingPattern */
-                || kind === 167 /* ObjectBindingPattern */;
-        }
-        return false;
-    }
-    ts.isBindingPattern = isBindingPattern;
-    function isBindingElement(node) {
-        return node.kind === 169 /* BindingElement */;
-    }
-    ts.isBindingElement = isBindingElement;
-    function isArrayBindingElement(node) {
-        var kind = node.kind;
-        return kind === 169 /* BindingElement */
-            || kind === 193 /* OmittedExpression */;
-    }
-    ts.isArrayBindingElement = isArrayBindingElement;
-    // Expression
-    function isPropertyAccessExpression(node) {
-        return node.kind === 172 /* PropertyAccessExpression */;
-    }
-    ts.isPropertyAccessExpression = isPropertyAccessExpression;
-    function isElementAccessExpression(node) {
-        return node.kind === 173 /* ElementAccessExpression */;
-    }
-    ts.isElementAccessExpression = isElementAccessExpression;
-    function isBinaryExpression(node) {
-        return node.kind === 187 /* BinaryExpression */;
-    }
-    ts.isBinaryExpression = isBinaryExpression;
-    function isConditionalExpression(node) {
-        return node.kind === 188 /* ConditionalExpression */;
-    }
-    ts.isConditionalExpression = isConditionalExpression;
-    function isCallExpression(node) {
-        return node.kind === 174 /* CallExpression */;
-    }
-    ts.isCallExpression = isCallExpression;
-    function isTemplate(node) {
-        var kind = node.kind;
-        return kind === 189 /* TemplateExpression */
-            || kind === 11 /* NoSubstitutionTemplateLiteral */;
-    }
-    ts.isTemplate = isTemplate;
-    function isSpreadElementExpression(node) {
-        return node.kind === 191 /* SpreadElementExpression */;
-    }
-    ts.isSpreadElementExpression = isSpreadElementExpression;
-    function isExpressionWithTypeArguments(node) {
-        return node.kind === 194 /* ExpressionWithTypeArguments */;
-    }
-    ts.isExpressionWithTypeArguments = isExpressionWithTypeArguments;
-    function isLeftHandSideExpressionKind(kind) {
-        return kind === 172 /* PropertyAccessExpression */
-            || kind === 173 /* ElementAccessExpression */
-            || kind === 175 /* NewExpression */
-            || kind === 174 /* CallExpression */
-            || kind === 241 /* JsxElement */
-            || kind === 242 /* JsxSelfClosingElement */
-            || kind === 176 /* TaggedTemplateExpression */
-            || kind === 170 /* ArrayLiteralExpression */
-            || kind === 178 /* ParenthesizedExpression */
-            || kind === 171 /* ObjectLiteralExpression */
-            || kind === 192 /* ClassExpression */
-            || kind === 179 /* FunctionExpression */
-            || kind === 69 /* Identifier */
-            || kind === 10 /* RegularExpressionLiteral */
-            || kind === 8 /* NumericLiteral */
-            || kind === 9 /* StringLiteral */
-            || kind === 11 /* NoSubstitutionTemplateLiteral */
-            || kind === 189 /* TemplateExpression */
-            || kind === 84 /* FalseKeyword */
-            || kind === 93 /* NullKeyword */
-            || kind === 97 /* ThisKeyword */
-            || kind === 99 /* TrueKeyword */
-            || kind === 95 /* SuperKeyword */
-            || kind === 196 /* NonNullExpression */;
-    }
-    function isLeftHandSideExpression(node) {
-        return isLeftHandSideExpressionKind(ts.skipPartiallyEmittedExpressions(node).kind);
-    }
-    ts.isLeftHandSideExpression = isLeftHandSideExpression;
-    function isUnaryExpressionKind(kind) {
-        return kind === 185 /* PrefixUnaryExpression */
-            || kind === 186 /* PostfixUnaryExpression */
-            || kind === 181 /* DeleteExpression */
-            || kind === 182 /* TypeOfExpression */
-            || kind === 183 /* VoidExpression */
-            || kind === 184 /* AwaitExpression */
-            || kind === 177 /* TypeAssertionExpression */
-            || isLeftHandSideExpressionKind(kind);
-    }
-    function isUnaryExpression(node) {
-        return isUnaryExpressionKind(ts.skipPartiallyEmittedExpressions(node).kind);
-    }
-    ts.isUnaryExpression = isUnaryExpression;
-    function isExpressionKind(kind) {
-        return kind === 188 /* ConditionalExpression */
-            || kind === 190 /* YieldExpression */
-            || kind === 180 /* ArrowFunction */
-            || kind === 187 /* BinaryExpression */
-            || kind === 191 /* SpreadElementExpression */
-            || kind === 195 /* AsExpression */
-            || kind === 193 /* OmittedExpression */
-            || isUnaryExpressionKind(kind);
-    }
-    function isExpression(node) {
-        return isExpressionKind(ts.skipPartiallyEmittedExpressions(node).kind);
-    }
-    ts.isExpression = isExpression;
-    function isAssertionExpression(node) {
-        var kind = node.kind;
-        return kind === 177 /* TypeAssertionExpression */
-            || kind === 195 /* AsExpression */;
-    }
-    ts.isAssertionExpression = isAssertionExpression;
-    function isPartiallyEmittedExpression(node) {
-        return node.kind === 288 /* PartiallyEmittedExpression */;
-    }
-    ts.isPartiallyEmittedExpression = isPartiallyEmittedExpression;
-    function isNotEmittedStatement(node) {
-        return node.kind === 287 /* NotEmittedStatement */;
-    }
-    ts.isNotEmittedStatement = isNotEmittedStatement;
-    function isNotEmittedOrPartiallyEmittedNode(node) {
-        return isNotEmittedStatement(node)
-            || isPartiallyEmittedExpression(node);
-    }
-    ts.isNotEmittedOrPartiallyEmittedNode = isNotEmittedOrPartiallyEmittedNode;
-    function isOmittedExpression(node) {
-        return node.kind === 193 /* OmittedExpression */;
-    }
-    ts.isOmittedExpression = isOmittedExpression;
-    // Misc
-    function isTemplateSpan(node) {
-        return node.kind === 197 /* TemplateSpan */;
-    }
-    ts.isTemplateSpan = isTemplateSpan;
-    // Element
-    function isBlock(node) {
-        return node.kind === 199 /* Block */;
-    }
-    ts.isBlock = isBlock;
-    function isConciseBody(node) {
-        return isBlock(node)
-            || isExpression(node);
-    }
-    ts.isConciseBody = isConciseBody;
-    function isFunctionBody(node) {
-        return isBlock(node);
-    }
-    ts.isFunctionBody = isFunctionBody;
-    function isForInitializer(node) {
-        return isVariableDeclarationList(node)
-            || isExpression(node);
-    }
-    ts.isForInitializer = isForInitializer;
-    function isVariableDeclaration(node) {
-        return node.kind === 218 /* VariableDeclaration */;
-    }
-    ts.isVariableDeclaration = isVariableDeclaration;
-    function isVariableDeclarationList(node) {
-        return node.kind === 219 /* VariableDeclarationList */;
-    }
-    ts.isVariableDeclarationList = isVariableDeclarationList;
-    function isCaseBlock(node) {
-        return node.kind === 227 /* CaseBlock */;
-    }
-    ts.isCaseBlock = isCaseBlock;
-    function isModuleBody(node) {
-        var kind = node.kind;
-        return kind === 226 /* ModuleBlock */
-            || kind === 225 /* ModuleDeclaration */;
-    }
-    ts.isModuleBody = isModuleBody;
-    function isImportEqualsDeclaration(node) {
-        return node.kind === 229 /* ImportEqualsDeclaration */;
-    }
-    ts.isImportEqualsDeclaration = isImportEqualsDeclaration;
-    function isImportClause(node) {
-        return node.kind === 231 /* ImportClause */;
-    }
-    ts.isImportClause = isImportClause;
-    function isNamedImportBindings(node) {
-        var kind = node.kind;
-        return kind === 233 /* NamedImports */
-            || kind === 232 /* NamespaceImport */;
-    }
-    ts.isNamedImportBindings = isNamedImportBindings;
-    function isImportSpecifier(node) {
-        return node.kind === 234 /* ImportSpecifier */;
-    }
-    ts.isImportSpecifier = isImportSpecifier;
-    function isNamedExports(node) {
-        return node.kind === 237 /* NamedExports */;
-    }
-    ts.isNamedExports = isNamedExports;
-    function isExportSpecifier(node) {
-        return node.kind === 238 /* ExportSpecifier */;
-    }
-    ts.isExportSpecifier = isExportSpecifier;
-    function isModuleOrEnumDeclaration(node) {
-        return node.kind === 225 /* ModuleDeclaration */ || node.kind === 224 /* EnumDeclaration */;
-    }
-    ts.isModuleOrEnumDeclaration = isModuleOrEnumDeclaration;
-    function isDeclarationKind(kind) {
-        return kind === 180 /* ArrowFunction */
-            || kind === 169 /* BindingElement */
-            || kind === 221 /* ClassDeclaration */
-            || kind === 192 /* ClassExpression */
-            || kind === 148 /* Constructor */
-            || kind === 224 /* EnumDeclaration */
-            || kind === 255 /* EnumMember */
-            || kind === 238 /* ExportSpecifier */
-            || kind === 220 /* FunctionDeclaration */
-            || kind === 179 /* FunctionExpression */
-            || kind === 149 /* GetAccessor */
-            || kind === 231 /* ImportClause */
-            || kind === 229 /* ImportEqualsDeclaration */
-            || kind === 234 /* ImportSpecifier */
-            || kind === 222 /* InterfaceDeclaration */
-            || kind === 147 /* MethodDeclaration */
-            || kind === 146 /* MethodSignature */
-            || kind === 225 /* ModuleDeclaration */
-            || kind === 228 /* NamespaceExportDeclaration */
-            || kind === 232 /* NamespaceImport */
-            || kind === 142 /* Parameter */
-            || kind === 253 /* PropertyAssignment */
-            || kind === 145 /* PropertyDeclaration */
-            || kind === 144 /* PropertySignature */
-            || kind === 150 /* SetAccessor */
-            || kind === 254 /* ShorthandPropertyAssignment */
-            || kind === 223 /* TypeAliasDeclaration */
-            || kind === 141 /* TypeParameter */
-            || kind === 218 /* VariableDeclaration */
-            || kind === 279 /* JSDocTypedefTag */;
-    }
-    function isDeclarationStatementKind(kind) {
-        return kind === 220 /* FunctionDeclaration */
-            || kind === 239 /* MissingDeclaration */
-            || kind === 221 /* ClassDeclaration */
-            || kind === 222 /* InterfaceDeclaration */
-            || kind === 223 /* TypeAliasDeclaration */
-            || kind === 224 /* EnumDeclaration */
-            || kind === 225 /* ModuleDeclaration */
-            || kind === 230 /* ImportDeclaration */
-            || kind === 229 /* ImportEqualsDeclaration */
-            || kind === 236 /* ExportDeclaration */
-            || kind === 235 /* ExportAssignment */
-            || kind === 228 /* NamespaceExportDeclaration */;
-    }
-    function isStatementKindButNotDeclarationKind(kind) {
-        return kind === 210 /* BreakStatement */
-            || kind === 209 /* ContinueStatement */
-            || kind === 217 /* DebuggerStatement */
-            || kind === 204 /* DoStatement */
-            || kind === 202 /* ExpressionStatement */
-            || kind === 201 /* EmptyStatement */
-            || kind === 207 /* ForInStatement */
-            || kind === 208 /* ForOfStatement */
-            || kind === 206 /* ForStatement */
-            || kind === 203 /* IfStatement */
-            || kind === 214 /* LabeledStatement */
-            || kind === 211 /* ReturnStatement */
-            || kind === 213 /* SwitchStatement */
-            || kind === 215 /* ThrowStatement */
-            || kind === 216 /* TryStatement */
-            || kind === 200 /* VariableStatement */
-            || kind === 205 /* WhileStatement */
-            || kind === 212 /* WithStatement */
-            || kind === 287 /* NotEmittedStatement */;
-    }
-    function isDeclaration(node) {
-        return isDeclarationKind(node.kind);
-    }
-    ts.isDeclaration = isDeclaration;
-    function isDeclarationStatement(node) {
-        return isDeclarationStatementKind(node.kind);
-    }
-    ts.isDeclarationStatement = isDeclarationStatement;
-    /**
-     * Determines whether the node is a statement that is not also a declaration
-     */
-    function isStatementButNotDeclaration(node) {
-        return isStatementKindButNotDeclarationKind(node.kind);
-    }
-    ts.isStatementButNotDeclaration = isStatementButNotDeclaration;
-    function isStatement(node) {
-        var kind = node.kind;
-        return isStatementKindButNotDeclarationKind(kind)
-            || isDeclarationStatementKind(kind)
-            || kind === 199 /* Block */;
-    }
-    ts.isStatement = isStatement;
-    // Module references
-    function isModuleReference(node) {
-        var kind = node.kind;
-        return kind === 240 /* ExternalModuleReference */
-            || kind === 139 /* QualifiedName */
-            || kind === 69 /* Identifier */;
-    }
-    ts.isModuleReference = isModuleReference;
-    // JSX
-    function isJsxOpeningElement(node) {
-        return node.kind === 243 /* JsxOpeningElement */;
-    }
-    ts.isJsxOpeningElement = isJsxOpeningElement;
-    function isJsxClosingElement(node) {
-        return node.kind === 245 /* JsxClosingElement */;
-    }
-    ts.isJsxClosingElement = isJsxClosingElement;
-    function isJsxTagNameExpression(node) {
-        var kind = node.kind;
-        return kind === 97 /* ThisKeyword */
-            || kind === 69 /* Identifier */
-            || kind === 172 /* PropertyAccessExpression */;
-    }
-    ts.isJsxTagNameExpression = isJsxTagNameExpression;
-    function isJsxChild(node) {
-        var kind = node.kind;
-        return kind === 241 /* JsxElement */
-            || kind === 248 /* JsxExpression */
-            || kind === 242 /* JsxSelfClosingElement */
-            || kind === 244 /* JsxText */;
-    }
-    ts.isJsxChild = isJsxChild;
-    function isJsxAttributeLike(node) {
-        var kind = node.kind;
-        return kind === 246 /* JsxAttribute */
-            || kind === 247 /* JsxSpreadAttribute */;
-    }
-    ts.isJsxAttributeLike = isJsxAttributeLike;
-    function isJsxSpreadAttribute(node) {
-        return node.kind === 247 /* JsxSpreadAttribute */;
-    }
-    ts.isJsxSpreadAttribute = isJsxSpreadAttribute;
-    function isJsxAttribute(node) {
-        return node.kind === 246 /* JsxAttribute */;
-    }
-    ts.isJsxAttribute = isJsxAttribute;
-    function isStringLiteralOrJsxExpression(node) {
-        var kind = node.kind;
-        return kind === 9 /* StringLiteral */
-            || kind === 248 /* JsxExpression */;
-    }
-    ts.isStringLiteralOrJsxExpression = isStringLiteralOrJsxExpression;
-    // Clauses
-    function isCaseOrDefaultClause(node) {
-        var kind = node.kind;
-        return kind === 249 /* CaseClause */
-            || kind === 250 /* DefaultClause */;
-    }
-    ts.isCaseOrDefaultClause = isCaseOrDefaultClause;
-    function isHeritageClause(node) {
-        return node.kind === 251 /* HeritageClause */;
-    }
-    ts.isHeritageClause = isHeritageClause;
-    function isCatchClause(node) {
-        return node.kind === 252 /* CatchClause */;
-    }
-    ts.isCatchClause = isCatchClause;
-    // Property assignments
-    function isPropertyAssignment(node) {
-        return node.kind === 253 /* PropertyAssignment */;
-    }
-    ts.isPropertyAssignment = isPropertyAssignment;
-    function isShorthandPropertyAssignment(node) {
-        return node.kind === 254 /* ShorthandPropertyAssignment */;
-    }
-    ts.isShorthandPropertyAssignment = isShorthandPropertyAssignment;
-    // Enum
-    function isEnumMember(node) {
-        return node.kind === 255 /* EnumMember */;
-    }
-    ts.isEnumMember = isEnumMember;
-    // Top-level nodes
-    function isSourceFile(node) {
-        return node.kind === 256 /* SourceFile */;
-    }
-    ts.isSourceFile = isSourceFile;
     function isWatchSet(options) {
         // Firefox has Object.prototype.watch
         return options.watch && options.hasOwnProperty("watch");
     }
     ts.isWatchSet = isWatchSet;
+    function getCheckFlags(symbol) {
+        return symbol.flags & 134217728 /* Transient */ ? symbol.checkFlags : 0;
+    }
+    ts.getCheckFlags = getCheckFlags;
+    function getDeclarationModifierFlagsFromSymbol(s) {
+        if (s.valueDeclaration) {
+            var flags = ts.getCombinedModifierFlags(s.valueDeclaration);
+            return s.parent && s.parent.flags & 32 /* Class */ ? flags : flags & ~28 /* AccessibilityModifier */;
+        }
+        if (getCheckFlags(s) & 6 /* Synthetic */) {
+            var checkFlags = s.checkFlags;
+            var accessModifier = checkFlags & 256 /* ContainsPrivate */ ? 8 /* Private */ :
+                checkFlags & 64 /* ContainsPublic */ ? 4 /* Public */ :
+                    16 /* Protected */;
+            var staticModifier = checkFlags & 512 /* ContainsStatic */ ? 32 /* Static */ : 0;
+            return accessModifier | staticModifier;
+        }
+        if (s.flags & 16777216 /* Prototype */) {
+            return 4 /* Public */ | 32 /* Static */;
+        }
+        return 0;
+    }
+    ts.getDeclarationModifierFlagsFromSymbol = getDeclarationModifierFlagsFromSymbol;
+    function levenshtein(s1, s2) {
+        var previous = new Array(s2.length + 1);
+        var current = new Array(s2.length + 1);
+        for (var i = 0; i < s2.length + 1; i++) {
+            previous[i] = i;
+            current[i] = -1;
+        }
+        for (var i = 1; i < s1.length + 1; i++) {
+            current[0] = i;
+            for (var j = 1; j < s2.length + 1; j++) {
+                current[j] = Math.min(previous[j] + 1, current[j - 1] + 1, previous[j - 1] + (s1[i - 1] === s2[j - 1] ? 0 : 2));
+            }
+            // shift current back to previous, and then reuse previous' array
+            var tmp = previous;
+            previous = current;
+            current = tmp;
+        }
+        return previous[previous.length - 1];
+    }
+    ts.levenshtein = levenshtein;
 })(ts || (ts = {}));
-var ts;
 (function (ts) {
     function getDefaultLibFileName(options) {
-        return options.target === 2 /* ES6 */ ? "lib.es6.d.ts" : "lib.d.ts";
+        switch (options.target) {
+            case 5 /* ESNext */:
+                return "lib.esnext.full.d.ts";
+            case 4 /* ES2017 */:
+                return "lib.es2017.full.d.ts";
+            case 3 /* ES2016 */:
+                return "lib.es2016.full.d.ts";
+            case 2 /* ES2015 */:
+                return "lib.es6.d.ts"; // We don't use lib.es2015.full.d.ts due to breaking change.
+            default:
+                return "lib.d.ts";
+        }
     }
     ts.getDefaultLibFileName = getDefaultLibFileName;
     function textSpanEnd(span) {
@@ -7566,13 +7624,13 @@ var ts;
             oldEndN = Math.max(oldEnd1, oldEnd1 + (oldEnd2 - newEnd1));
             newEndN = Math.max(newEnd2, newEnd2 + (newEnd1 - oldEnd2));
         }
-        return createTextChangeRange(createTextSpanFromBounds(oldStartN, oldEndN), /*newLength:*/ newEndN - oldStartN);
+        return createTextChangeRange(createTextSpanFromBounds(oldStartN, oldEndN), /*newLength*/ newEndN - oldStartN);
     }
     ts.collapseTextChangeRangesAcrossMultipleVersions = collapseTextChangeRangesAcrossMultipleVersions;
     function getTypeParameterOwner(d) {
-        if (d && d.kind === 141 /* TypeParameter */) {
+        if (d && d.kind === 145 /* TypeParameter */) {
             for (var current = d; current; current = current.parent) {
-                if (ts.isFunctionLike(current) || ts.isClassLike(current) || current.kind === 222 /* InterfaceDeclaration */) {
+                if (ts.isFunctionLike(current) || ts.isClassLike(current) || current.kind === 230 /* InterfaceDeclaration */) {
                     return current;
                 }
             }
@@ -7580,11 +7638,11 @@ var ts;
     }
     ts.getTypeParameterOwner = getTypeParameterOwner;
     function isParameterPropertyDeclaration(node) {
-        return ts.hasModifier(node, 92 /* ParameterPropertyModifier */) && node.parent.kind === 148 /* Constructor */ && ts.isClassLike(node.parent.parent);
+        return ts.hasModifier(node, 92 /* ParameterPropertyModifier */) && node.parent.kind === 152 /* Constructor */ && ts.isClassLike(node.parent.parent);
     }
     ts.isParameterPropertyDeclaration = isParameterPropertyDeclaration;
     function walkUpBindingElementsAndPatterns(node) {
-        while (node && (node.kind === 169 /* BindingElement */ || ts.isBindingPattern(node))) {
+        while (node && (node.kind === 176 /* BindingElement */ || ts.isBindingPattern(node))) {
             node = node.parent;
         }
         return node;
@@ -7592,14 +7650,14 @@ var ts;
     function getCombinedModifierFlags(node) {
         node = walkUpBindingElementsAndPatterns(node);
         var flags = ts.getModifierFlags(node);
-        if (node.kind === 218 /* VariableDeclaration */) {
+        if (node.kind === 226 /* VariableDeclaration */) {
             node = node.parent;
         }
-        if (node && node.kind === 219 /* VariableDeclarationList */) {
+        if (node && node.kind === 227 /* VariableDeclarationList */) {
             flags |= ts.getModifierFlags(node);
             node = node.parent;
         }
-        if (node && node.kind === 200 /* VariableStatement */) {
+        if (node && node.kind === 208 /* VariableStatement */) {
             flags |= ts.getModifierFlags(node);
         }
         return flags;
@@ -7615,500 +7673,1959 @@ var ts;
     function getCombinedNodeFlags(node) {
         node = walkUpBindingElementsAndPatterns(node);
         var flags = node.flags;
-        if (node.kind === 218 /* VariableDeclaration */) {
+        if (node.kind === 226 /* VariableDeclaration */) {
             node = node.parent;
         }
-        if (node && node.kind === 219 /* VariableDeclarationList */) {
+        if (node && node.kind === 227 /* VariableDeclarationList */) {
             flags |= node.flags;
             node = node.parent;
         }
-        if (node && node.kind === 200 /* VariableStatement */) {
+        if (node && node.kind === 208 /* VariableStatement */) {
             flags |= node.flags;
         }
         return flags;
     }
     ts.getCombinedNodeFlags = getCombinedNodeFlags;
+    /**
+     * Checks to see if the locale is in the appropriate format,
+     * and if it is, attempts to set the appropriate language.
+     */
+    function validateLocaleAndSetLanguage(locale, sys, errors) {
+        var matchResult = /^([a-z]+)([_\-]([a-z]+))?$/.exec(locale.toLowerCase());
+        if (!matchResult) {
+            if (errors) {
+                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Locale_must_be_of_the_form_language_or_language_territory_For_example_0_or_1, "en", "ja-jp"));
+            }
+            return;
+        }
+        var language = matchResult[1];
+        var territory = matchResult[3];
+        // First try the entire locale, then fall back to just language if that's all we have.
+        // Either ways do not fail, and fallback to the English diagnostic strings.
+        if (!trySetLanguageAndTerritory(language, territory, errors)) {
+            trySetLanguageAndTerritory(language, /*territory*/ undefined, errors);
+        }
+        function trySetLanguageAndTerritory(language, territory, errors) {
+            var compilerFilePath = ts.normalizePath(sys.getExecutingFilePath());
+            var containingDirectoryPath = ts.getDirectoryPath(compilerFilePath);
+            var filePath = ts.combinePaths(containingDirectoryPath, language);
+            if (territory) {
+                filePath = filePath + "-" + territory;
+            }
+            filePath = sys.resolvePath(ts.combinePaths(filePath, "diagnosticMessages.generated.json"));
+            if (!sys.fileExists(filePath)) {
+                return false;
+            }
+            // TODO: Add codePage support for readFile?
+            var fileContents = "";
+            try {
+                fileContents = sys.readFile(filePath);
+            }
+            catch (e) {
+                if (errors) {
+                    errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unable_to_open_file_0, filePath));
+                }
+                return false;
+            }
+            try {
+                ts.localizedDiagnosticMessages = JSON.parse(fileContents);
+            }
+            catch (e) {
+                if (errors) {
+                    errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Corrupted_locale_file_0, filePath));
+                }
+                return false;
+            }
+            return true;
+        }
+    }
+    ts.validateLocaleAndSetLanguage = validateLocaleAndSetLanguage;
+    function getOriginalNode(node, nodeTest) {
+        if (node) {
+            while (node.original !== undefined) {
+                node = node.original;
+            }
+        }
+        return !nodeTest || nodeTest(node) ? node : undefined;
+    }
+    ts.getOriginalNode = getOriginalNode;
+    /**
+     * Gets a value indicating whether a node originated in the parse tree.
+     *
+     * @param node The node to test.
+     */
+    function isParseTreeNode(node) {
+        return (node.flags & 8 /* Synthesized */) === 0;
+    }
+    ts.isParseTreeNode = isParseTreeNode;
+    function getParseTreeNode(node, nodeTest) {
+        if (node === undefined || isParseTreeNode(node)) {
+            return node;
+        }
+        node = getOriginalNode(node);
+        if (isParseTreeNode(node) && (!nodeTest || nodeTest(node))) {
+            return node;
+        }
+        return undefined;
+    }
+    ts.getParseTreeNode = getParseTreeNode;
+    /**
+     * Remove extra underscore from escaped identifier text content.
+     *
+     * @param identifier The escaped identifier text.
+     * @returns The unescaped identifier text.
+     */
+    function unescapeIdentifier(identifier) {
+        return identifier.length >= 3 && identifier.charCodeAt(0) === 95 /* _ */ && identifier.charCodeAt(1) === 95 /* _ */ && identifier.charCodeAt(2) === 95 /* _ */ ? identifier.substr(1) : identifier;
+    }
+    ts.unescapeIdentifier = unescapeIdentifier;
+    function getNameOfDeclaration(declaration) {
+        if (!declaration) {
+            return undefined;
+        }
+        if (declaration.kind === 194 /* BinaryExpression */) {
+            var expr = declaration;
+            switch (ts.getSpecialPropertyAssignmentKind(expr)) {
+                case 1 /* ExportsProperty */:
+                case 4 /* ThisProperty */:
+                case 5 /* Property */:
+                case 3 /* PrototypeProperty */:
+                    return expr.left.name;
+                default:
+                    return undefined;
+            }
+        }
+        else {
+            return declaration.name;
+        }
+    }
+    ts.getNameOfDeclaration = getNameOfDeclaration;
 })(ts || (ts = {}));
-// <auto-generated />
-/// <reference path="types.ts" />
-/* @internal */
-var ts;
+// Simple node tests of the form `node.kind === SyntaxKind.Foo`.
 (function (ts) {
-    ts.Diagnostics = {
-        Unterminated_string_literal: { code: 1002, category: ts.DiagnosticCategory.Error, key: "Unterminated_string_literal_1002", message: "Unterminated string literal." },
-        Identifier_expected: { code: 1003, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_1003", message: "Identifier expected." },
-        _0_expected: { code: 1005, category: ts.DiagnosticCategory.Error, key: "_0_expected_1005", message: "'{0}' expected." },
-        A_file_cannot_have_a_reference_to_itself: { code: 1006, category: ts.DiagnosticCategory.Error, key: "A_file_cannot_have_a_reference_to_itself_1006", message: "A file cannot have a reference to itself." },
-        Trailing_comma_not_allowed: { code: 1009, category: ts.DiagnosticCategory.Error, key: "Trailing_comma_not_allowed_1009", message: "Trailing comma not allowed." },
-        Asterisk_Slash_expected: { code: 1010, category: ts.DiagnosticCategory.Error, key: "Asterisk_Slash_expected_1010", message: "'*/' expected." },
-        Unexpected_token: { code: 1012, category: ts.DiagnosticCategory.Error, key: "Unexpected_token_1012", message: "Unexpected token." },
-        A_rest_parameter_must_be_last_in_a_parameter_list: { code: 1014, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_must_be_last_in_a_parameter_list_1014", message: "A rest parameter must be last in a parameter list." },
-        Parameter_cannot_have_question_mark_and_initializer: { code: 1015, category: ts.DiagnosticCategory.Error, key: "Parameter_cannot_have_question_mark_and_initializer_1015", message: "Parameter cannot have question mark and initializer." },
-        A_required_parameter_cannot_follow_an_optional_parameter: { code: 1016, category: ts.DiagnosticCategory.Error, key: "A_required_parameter_cannot_follow_an_optional_parameter_1016", message: "A required parameter cannot follow an optional parameter." },
-        An_index_signature_cannot_have_a_rest_parameter: { code: 1017, category: ts.DiagnosticCategory.Error, key: "An_index_signature_cannot_have_a_rest_parameter_1017", message: "An index signature cannot have a rest parameter." },
-        An_index_signature_parameter_cannot_have_an_accessibility_modifier: { code: 1018, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_cannot_have_an_accessibility_modifier_1018", message: "An index signature parameter cannot have an accessibility modifier." },
-        An_index_signature_parameter_cannot_have_a_question_mark: { code: 1019, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_cannot_have_a_question_mark_1019", message: "An index signature parameter cannot have a question mark." },
-        An_index_signature_parameter_cannot_have_an_initializer: { code: 1020, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_cannot_have_an_initializer_1020", message: "An index signature parameter cannot have an initializer." },
-        An_index_signature_must_have_a_type_annotation: { code: 1021, category: ts.DiagnosticCategory.Error, key: "An_index_signature_must_have_a_type_annotation_1021", message: "An index signature must have a type annotation." },
-        An_index_signature_parameter_must_have_a_type_annotation: { code: 1022, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_must_have_a_type_annotation_1022", message: "An index signature parameter must have a type annotation." },
-        An_index_signature_parameter_type_must_be_string_or_number: { code: 1023, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_type_must_be_string_or_number_1023", message: "An index signature parameter type must be 'string' or 'number'." },
-        readonly_modifier_can_only_appear_on_a_property_declaration_or_index_signature: { code: 1024, category: ts.DiagnosticCategory.Error, key: "readonly_modifier_can_only_appear_on_a_property_declaration_or_index_signature_1024", message: "'readonly' modifier can only appear on a property declaration or index signature." },
-        Accessibility_modifier_already_seen: { code: 1028, category: ts.DiagnosticCategory.Error, key: "Accessibility_modifier_already_seen_1028", message: "Accessibility modifier already seen." },
-        _0_modifier_must_precede_1_modifier: { code: 1029, category: ts.DiagnosticCategory.Error, key: "_0_modifier_must_precede_1_modifier_1029", message: "'{0}' modifier must precede '{1}' modifier." },
-        _0_modifier_already_seen: { code: 1030, category: ts.DiagnosticCategory.Error, key: "_0_modifier_already_seen_1030", message: "'{0}' modifier already seen." },
-        _0_modifier_cannot_appear_on_a_class_element: { code: 1031, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_class_element_1031", message: "'{0}' modifier cannot appear on a class element." },
-        super_must_be_followed_by_an_argument_list_or_member_access: { code: 1034, category: ts.DiagnosticCategory.Error, key: "super_must_be_followed_by_an_argument_list_or_member_access_1034", message: "'super' must be followed by an argument list or member access." },
-        Only_ambient_modules_can_use_quoted_names: { code: 1035, category: ts.DiagnosticCategory.Error, key: "Only_ambient_modules_can_use_quoted_names_1035", message: "Only ambient modules can use quoted names." },
-        Statements_are_not_allowed_in_ambient_contexts: { code: 1036, category: ts.DiagnosticCategory.Error, key: "Statements_are_not_allowed_in_ambient_contexts_1036", message: "Statements are not allowed in ambient contexts." },
-        A_declare_modifier_cannot_be_used_in_an_already_ambient_context: { code: 1038, category: ts.DiagnosticCategory.Error, key: "A_declare_modifier_cannot_be_used_in_an_already_ambient_context_1038", message: "A 'declare' modifier cannot be used in an already ambient context." },
-        Initializers_are_not_allowed_in_ambient_contexts: { code: 1039, category: ts.DiagnosticCategory.Error, key: "Initializers_are_not_allowed_in_ambient_contexts_1039", message: "Initializers are not allowed in ambient contexts." },
-        _0_modifier_cannot_be_used_in_an_ambient_context: { code: 1040, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_in_an_ambient_context_1040", message: "'{0}' modifier cannot be used in an ambient context." },
-        _0_modifier_cannot_be_used_with_a_class_declaration: { code: 1041, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_with_a_class_declaration_1041", message: "'{0}' modifier cannot be used with a class declaration." },
-        _0_modifier_cannot_be_used_here: { code: 1042, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_here_1042", message: "'{0}' modifier cannot be used here." },
-        _0_modifier_cannot_appear_on_a_data_property: { code: 1043, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_data_property_1043", message: "'{0}' modifier cannot appear on a data property." },
-        _0_modifier_cannot_appear_on_a_module_or_namespace_element: { code: 1044, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_module_or_namespace_element_1044", message: "'{0}' modifier cannot appear on a module or namespace element." },
-        A_0_modifier_cannot_be_used_with_an_interface_declaration: { code: 1045, category: ts.DiagnosticCategory.Error, key: "A_0_modifier_cannot_be_used_with_an_interface_declaration_1045", message: "A '{0}' modifier cannot be used with an interface declaration." },
-        A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file: { code: 1046, category: ts.DiagnosticCategory.Error, key: "A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file_1046", message: "A 'declare' modifier is required for a top level declaration in a .d.ts file." },
-        A_rest_parameter_cannot_be_optional: { code: 1047, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_cannot_be_optional_1047", message: "A rest parameter cannot be optional." },
-        A_rest_parameter_cannot_have_an_initializer: { code: 1048, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_cannot_have_an_initializer_1048", message: "A rest parameter cannot have an initializer." },
-        A_set_accessor_must_have_exactly_one_parameter: { code: 1049, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_must_have_exactly_one_parameter_1049", message: "A 'set' accessor must have exactly one parameter." },
-        A_set_accessor_cannot_have_an_optional_parameter: { code: 1051, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_cannot_have_an_optional_parameter_1051", message: "A 'set' accessor cannot have an optional parameter." },
-        A_set_accessor_parameter_cannot_have_an_initializer: { code: 1052, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_parameter_cannot_have_an_initializer_1052", message: "A 'set' accessor parameter cannot have an initializer." },
-        A_set_accessor_cannot_have_rest_parameter: { code: 1053, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_cannot_have_rest_parameter_1053", message: "A 'set' accessor cannot have rest parameter." },
-        A_get_accessor_cannot_have_parameters: { code: 1054, category: ts.DiagnosticCategory.Error, key: "A_get_accessor_cannot_have_parameters_1054", message: "A 'get' accessor cannot have parameters." },
-        Type_0_is_not_a_valid_async_function_return_type: { code: 1055, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_a_valid_async_function_return_type_1055", message: "Type '{0}' is not a valid async function return type." },
-        Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher: { code: 1056, category: ts.DiagnosticCategory.Error, key: "Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher_1056", message: "Accessors are only available when targeting ECMAScript 5 and higher." },
-        An_async_function_or_method_must_have_a_valid_awaitable_return_type: { code: 1057, category: ts.DiagnosticCategory.Error, key: "An_async_function_or_method_must_have_a_valid_awaitable_return_type_1057", message: "An async function or method must have a valid awaitable return type." },
-        Operand_for_await_does_not_have_a_valid_callable_then_member: { code: 1058, category: ts.DiagnosticCategory.Error, key: "Operand_for_await_does_not_have_a_valid_callable_then_member_1058", message: "Operand for 'await' does not have a valid callable 'then' member." },
-        Return_expression_in_async_function_does_not_have_a_valid_callable_then_member: { code: 1059, category: ts.DiagnosticCategory.Error, key: "Return_expression_in_async_function_does_not_have_a_valid_callable_then_member_1059", message: "Return expression in async function does not have a valid callable 'then' member." },
-        Expression_body_for_async_arrow_function_does_not_have_a_valid_callable_then_member: { code: 1060, category: ts.DiagnosticCategory.Error, key: "Expression_body_for_async_arrow_function_does_not_have_a_valid_callable_then_member_1060", message: "Expression body for async arrow function does not have a valid callable 'then' member." },
-        Enum_member_must_have_initializer: { code: 1061, category: ts.DiagnosticCategory.Error, key: "Enum_member_must_have_initializer_1061", message: "Enum member must have initializer." },
-        _0_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method: { code: 1062, category: ts.DiagnosticCategory.Error, key: "_0_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method_1062", message: "{0} is referenced directly or indirectly in the fulfillment callback of its own 'then' method." },
-        An_export_assignment_cannot_be_used_in_a_namespace: { code: 1063, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_cannot_be_used_in_a_namespace_1063", message: "An export assignment cannot be used in a namespace." },
-        The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type: { code: 1064, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type_1064", message: "The return type of an async function or method must be the global Promise<T> type." },
-        In_ambient_enum_declarations_member_initializer_must_be_constant_expression: { code: 1066, category: ts.DiagnosticCategory.Error, key: "In_ambient_enum_declarations_member_initializer_must_be_constant_expression_1066", message: "In ambient enum declarations member initializer must be constant expression." },
-        Unexpected_token_A_constructor_method_accessor_or_property_was_expected: { code: 1068, category: ts.DiagnosticCategory.Error, key: "Unexpected_token_A_constructor_method_accessor_or_property_was_expected_1068", message: "Unexpected token. A constructor, method, accessor, or property was expected." },
-        _0_modifier_cannot_appear_on_a_type_member: { code: 1070, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_type_member_1070", message: "'{0}' modifier cannot appear on a type member." },
-        _0_modifier_cannot_appear_on_an_index_signature: { code: 1071, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_an_index_signature_1071", message: "'{0}' modifier cannot appear on an index signature." },
-        A_0_modifier_cannot_be_used_with_an_import_declaration: { code: 1079, category: ts.DiagnosticCategory.Error, key: "A_0_modifier_cannot_be_used_with_an_import_declaration_1079", message: "A '{0}' modifier cannot be used with an import declaration." },
-        Invalid_reference_directive_syntax: { code: 1084, category: ts.DiagnosticCategory.Error, key: "Invalid_reference_directive_syntax_1084", message: "Invalid 'reference' directive syntax." },
-        Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher: { code: 1085, category: ts.DiagnosticCategory.Error, key: "Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher_1085", message: "Octal literals are not available when targeting ECMAScript 5 and higher." },
-        An_accessor_cannot_be_declared_in_an_ambient_context: { code: 1086, category: ts.DiagnosticCategory.Error, key: "An_accessor_cannot_be_declared_in_an_ambient_context_1086", message: "An accessor cannot be declared in an ambient context." },
-        _0_modifier_cannot_appear_on_a_constructor_declaration: { code: 1089, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_constructor_declaration_1089", message: "'{0}' modifier cannot appear on a constructor declaration." },
-        _0_modifier_cannot_appear_on_a_parameter: { code: 1090, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_parameter_1090", message: "'{0}' modifier cannot appear on a parameter." },
-        Only_a_single_variable_declaration_is_allowed_in_a_for_in_statement: { code: 1091, category: ts.DiagnosticCategory.Error, key: "Only_a_single_variable_declaration_is_allowed_in_a_for_in_statement_1091", message: "Only a single variable declaration is allowed in a 'for...in' statement." },
-        Type_parameters_cannot_appear_on_a_constructor_declaration: { code: 1092, category: ts.DiagnosticCategory.Error, key: "Type_parameters_cannot_appear_on_a_constructor_declaration_1092", message: "Type parameters cannot appear on a constructor declaration." },
-        Type_annotation_cannot_appear_on_a_constructor_declaration: { code: 1093, category: ts.DiagnosticCategory.Error, key: "Type_annotation_cannot_appear_on_a_constructor_declaration_1093", message: "Type annotation cannot appear on a constructor declaration." },
-        An_accessor_cannot_have_type_parameters: { code: 1094, category: ts.DiagnosticCategory.Error, key: "An_accessor_cannot_have_type_parameters_1094", message: "An accessor cannot have type parameters." },
-        A_set_accessor_cannot_have_a_return_type_annotation: { code: 1095, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_cannot_have_a_return_type_annotation_1095", message: "A 'set' accessor cannot have a return type annotation." },
-        An_index_signature_must_have_exactly_one_parameter: { code: 1096, category: ts.DiagnosticCategory.Error, key: "An_index_signature_must_have_exactly_one_parameter_1096", message: "An index signature must have exactly one parameter." },
-        _0_list_cannot_be_empty: { code: 1097, category: ts.DiagnosticCategory.Error, key: "_0_list_cannot_be_empty_1097", message: "'{0}' list cannot be empty." },
-        Type_parameter_list_cannot_be_empty: { code: 1098, category: ts.DiagnosticCategory.Error, key: "Type_parameter_list_cannot_be_empty_1098", message: "Type parameter list cannot be empty." },
-        Type_argument_list_cannot_be_empty: { code: 1099, category: ts.DiagnosticCategory.Error, key: "Type_argument_list_cannot_be_empty_1099", message: "Type argument list cannot be empty." },
-        Invalid_use_of_0_in_strict_mode: { code: 1100, category: ts.DiagnosticCategory.Error, key: "Invalid_use_of_0_in_strict_mode_1100", message: "Invalid use of '{0}' in strict mode." },
-        with_statements_are_not_allowed_in_strict_mode: { code: 1101, category: ts.DiagnosticCategory.Error, key: "with_statements_are_not_allowed_in_strict_mode_1101", message: "'with' statements are not allowed in strict mode." },
-        delete_cannot_be_called_on_an_identifier_in_strict_mode: { code: 1102, category: ts.DiagnosticCategory.Error, key: "delete_cannot_be_called_on_an_identifier_in_strict_mode_1102", message: "'delete' cannot be called on an identifier in strict mode." },
-        A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement: { code: 1104, category: ts.DiagnosticCategory.Error, key: "A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement_1104", message: "A 'continue' statement can only be used within an enclosing iteration statement." },
-        A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement: { code: 1105, category: ts.DiagnosticCategory.Error, key: "A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement_1105", message: "A 'break' statement can only be used within an enclosing iteration or switch statement." },
-        Jump_target_cannot_cross_function_boundary: { code: 1107, category: ts.DiagnosticCategory.Error, key: "Jump_target_cannot_cross_function_boundary_1107", message: "Jump target cannot cross function boundary." },
-        A_return_statement_can_only_be_used_within_a_function_body: { code: 1108, category: ts.DiagnosticCategory.Error, key: "A_return_statement_can_only_be_used_within_a_function_body_1108", message: "A 'return' statement can only be used within a function body." },
-        Expression_expected: { code: 1109, category: ts.DiagnosticCategory.Error, key: "Expression_expected_1109", message: "Expression expected." },
-        Type_expected: { code: 1110, category: ts.DiagnosticCategory.Error, key: "Type_expected_1110", message: "Type expected." },
-        A_default_clause_cannot_appear_more_than_once_in_a_switch_statement: { code: 1113, category: ts.DiagnosticCategory.Error, key: "A_default_clause_cannot_appear_more_than_once_in_a_switch_statement_1113", message: "A 'default' clause cannot appear more than once in a 'switch' statement." },
-        Duplicate_label_0: { code: 1114, category: ts.DiagnosticCategory.Error, key: "Duplicate_label_0_1114", message: "Duplicate label '{0}'" },
-        A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement: { code: 1115, category: ts.DiagnosticCategory.Error, key: "A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement_1115", message: "A 'continue' statement can only jump to a label of an enclosing iteration statement." },
-        A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement: { code: 1116, category: ts.DiagnosticCategory.Error, key: "A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement_1116", message: "A 'break' statement can only jump to a label of an enclosing statement." },
-        An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode: { code: 1117, category: ts.DiagnosticCategory.Error, key: "An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode_1117", message: "An object literal cannot have multiple properties with the same name in strict mode." },
-        An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name: { code: 1118, category: ts.DiagnosticCategory.Error, key: "An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name_1118", message: "An object literal cannot have multiple get/set accessors with the same name." },
-        An_object_literal_cannot_have_property_and_accessor_with_the_same_name: { code: 1119, category: ts.DiagnosticCategory.Error, key: "An_object_literal_cannot_have_property_and_accessor_with_the_same_name_1119", message: "An object literal cannot have property and accessor with the same name." },
-        An_export_assignment_cannot_have_modifiers: { code: 1120, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_cannot_have_modifiers_1120", message: "An export assignment cannot have modifiers." },
-        Octal_literals_are_not_allowed_in_strict_mode: { code: 1121, category: ts.DiagnosticCategory.Error, key: "Octal_literals_are_not_allowed_in_strict_mode_1121", message: "Octal literals are not allowed in strict mode." },
-        A_tuple_type_element_list_cannot_be_empty: { code: 1122, category: ts.DiagnosticCategory.Error, key: "A_tuple_type_element_list_cannot_be_empty_1122", message: "A tuple type element list cannot be empty." },
-        Variable_declaration_list_cannot_be_empty: { code: 1123, category: ts.DiagnosticCategory.Error, key: "Variable_declaration_list_cannot_be_empty_1123", message: "Variable declaration list cannot be empty." },
-        Digit_expected: { code: 1124, category: ts.DiagnosticCategory.Error, key: "Digit_expected_1124", message: "Digit expected." },
-        Hexadecimal_digit_expected: { code: 1125, category: ts.DiagnosticCategory.Error, key: "Hexadecimal_digit_expected_1125", message: "Hexadecimal digit expected." },
-        Unexpected_end_of_text: { code: 1126, category: ts.DiagnosticCategory.Error, key: "Unexpected_end_of_text_1126", message: "Unexpected end of text." },
-        Invalid_character: { code: 1127, category: ts.DiagnosticCategory.Error, key: "Invalid_character_1127", message: "Invalid character." },
-        Declaration_or_statement_expected: { code: 1128, category: ts.DiagnosticCategory.Error, key: "Declaration_or_statement_expected_1128", message: "Declaration or statement expected." },
-        Statement_expected: { code: 1129, category: ts.DiagnosticCategory.Error, key: "Statement_expected_1129", message: "Statement expected." },
-        case_or_default_expected: { code: 1130, category: ts.DiagnosticCategory.Error, key: "case_or_default_expected_1130", message: "'case' or 'default' expected." },
-        Property_or_signature_expected: { code: 1131, category: ts.DiagnosticCategory.Error, key: "Property_or_signature_expected_1131", message: "Property or signature expected." },
-        Enum_member_expected: { code: 1132, category: ts.DiagnosticCategory.Error, key: "Enum_member_expected_1132", message: "Enum member expected." },
-        Variable_declaration_expected: { code: 1134, category: ts.DiagnosticCategory.Error, key: "Variable_declaration_expected_1134", message: "Variable declaration expected." },
-        Argument_expression_expected: { code: 1135, category: ts.DiagnosticCategory.Error, key: "Argument_expression_expected_1135", message: "Argument expression expected." },
-        Property_assignment_expected: { code: 1136, category: ts.DiagnosticCategory.Error, key: "Property_assignment_expected_1136", message: "Property assignment expected." },
-        Expression_or_comma_expected: { code: 1137, category: ts.DiagnosticCategory.Error, key: "Expression_or_comma_expected_1137", message: "Expression or comma expected." },
-        Parameter_declaration_expected: { code: 1138, category: ts.DiagnosticCategory.Error, key: "Parameter_declaration_expected_1138", message: "Parameter declaration expected." },
-        Type_parameter_declaration_expected: { code: 1139, category: ts.DiagnosticCategory.Error, key: "Type_parameter_declaration_expected_1139", message: "Type parameter declaration expected." },
-        Type_argument_expected: { code: 1140, category: ts.DiagnosticCategory.Error, key: "Type_argument_expected_1140", message: "Type argument expected." },
-        String_literal_expected: { code: 1141, category: ts.DiagnosticCategory.Error, key: "String_literal_expected_1141", message: "String literal expected." },
-        Line_break_not_permitted_here: { code: 1142, category: ts.DiagnosticCategory.Error, key: "Line_break_not_permitted_here_1142", message: "Line break not permitted here." },
-        or_expected: { code: 1144, category: ts.DiagnosticCategory.Error, key: "or_expected_1144", message: "'{' or ';' expected." },
-        Declaration_expected: { code: 1146, category: ts.DiagnosticCategory.Error, key: "Declaration_expected_1146", message: "Declaration expected." },
-        Import_declarations_in_a_namespace_cannot_reference_a_module: { code: 1147, category: ts.DiagnosticCategory.Error, key: "Import_declarations_in_a_namespace_cannot_reference_a_module_1147", message: "Import declarations in a namespace cannot reference a module." },
-        Cannot_use_imports_exports_or_module_augmentations_when_module_is_none: { code: 1148, category: ts.DiagnosticCategory.Error, key: "Cannot_use_imports_exports_or_module_augmentations_when_module_is_none_1148", message: "Cannot use imports, exports, or module augmentations when '--module' is 'none'." },
-        File_name_0_differs_from_already_included_file_name_1_only_in_casing: { code: 1149, category: ts.DiagnosticCategory.Error, key: "File_name_0_differs_from_already_included_file_name_1_only_in_casing_1149", message: "File name '{0}' differs from already included file name '{1}' only in casing" },
-        new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead: { code: 1150, category: ts.DiagnosticCategory.Error, key: "new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead_1150", message: "'new T[]' cannot be used to create an array. Use 'new Array<T>()' instead." },
-        const_declarations_must_be_initialized: { code: 1155, category: ts.DiagnosticCategory.Error, key: "const_declarations_must_be_initialized_1155", message: "'const' declarations must be initialized" },
-        const_declarations_can_only_be_declared_inside_a_block: { code: 1156, category: ts.DiagnosticCategory.Error, key: "const_declarations_can_only_be_declared_inside_a_block_1156", message: "'const' declarations can only be declared inside a block." },
-        let_declarations_can_only_be_declared_inside_a_block: { code: 1157, category: ts.DiagnosticCategory.Error, key: "let_declarations_can_only_be_declared_inside_a_block_1157", message: "'let' declarations can only be declared inside a block." },
-        Unterminated_template_literal: { code: 1160, category: ts.DiagnosticCategory.Error, key: "Unterminated_template_literal_1160", message: "Unterminated template literal." },
-        Unterminated_regular_expression_literal: { code: 1161, category: ts.DiagnosticCategory.Error, key: "Unterminated_regular_expression_literal_1161", message: "Unterminated regular expression literal." },
-        An_object_member_cannot_be_declared_optional: { code: 1162, category: ts.DiagnosticCategory.Error, key: "An_object_member_cannot_be_declared_optional_1162", message: "An object member cannot be declared optional." },
-        A_yield_expression_is_only_allowed_in_a_generator_body: { code: 1163, category: ts.DiagnosticCategory.Error, key: "A_yield_expression_is_only_allowed_in_a_generator_body_1163", message: "A 'yield' expression is only allowed in a generator body." },
-        Computed_property_names_are_not_allowed_in_enums: { code: 1164, category: ts.DiagnosticCategory.Error, key: "Computed_property_names_are_not_allowed_in_enums_1164", message: "Computed property names are not allowed in enums." },
-        A_computed_property_name_in_an_ambient_context_must_directly_refer_to_a_built_in_symbol: { code: 1165, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_an_ambient_context_must_directly_refer_to_a_built_in_symbol_1165", message: "A computed property name in an ambient context must directly refer to a built-in symbol." },
-        A_computed_property_name_in_a_class_property_declaration_must_directly_refer_to_a_built_in_symbol: { code: 1166, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_a_class_property_declaration_must_directly_refer_to_a_built_in_symbol_1166", message: "A computed property name in a class property declaration must directly refer to a built-in symbol." },
-        A_computed_property_name_in_a_method_overload_must_directly_refer_to_a_built_in_symbol: { code: 1168, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_a_method_overload_must_directly_refer_to_a_built_in_symbol_1168", message: "A computed property name in a method overload must directly refer to a built-in symbol." },
-        A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol: { code: 1169, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol_1169", message: "A computed property name in an interface must directly refer to a built-in symbol." },
-        A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol: { code: 1170, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol_1170", message: "A computed property name in a type literal must directly refer to a built-in symbol." },
-        A_comma_expression_is_not_allowed_in_a_computed_property_name: { code: 1171, category: ts.DiagnosticCategory.Error, key: "A_comma_expression_is_not_allowed_in_a_computed_property_name_1171", message: "A comma expression is not allowed in a computed property name." },
-        extends_clause_already_seen: { code: 1172, category: ts.DiagnosticCategory.Error, key: "extends_clause_already_seen_1172", message: "'extends' clause already seen." },
-        extends_clause_must_precede_implements_clause: { code: 1173, category: ts.DiagnosticCategory.Error, key: "extends_clause_must_precede_implements_clause_1173", message: "'extends' clause must precede 'implements' clause." },
-        Classes_can_only_extend_a_single_class: { code: 1174, category: ts.DiagnosticCategory.Error, key: "Classes_can_only_extend_a_single_class_1174", message: "Classes can only extend a single class." },
-        implements_clause_already_seen: { code: 1175, category: ts.DiagnosticCategory.Error, key: "implements_clause_already_seen_1175", message: "'implements' clause already seen." },
-        Interface_declaration_cannot_have_implements_clause: { code: 1176, category: ts.DiagnosticCategory.Error, key: "Interface_declaration_cannot_have_implements_clause_1176", message: "Interface declaration cannot have 'implements' clause." },
-        Binary_digit_expected: { code: 1177, category: ts.DiagnosticCategory.Error, key: "Binary_digit_expected_1177", message: "Binary digit expected." },
-        Octal_digit_expected: { code: 1178, category: ts.DiagnosticCategory.Error, key: "Octal_digit_expected_1178", message: "Octal digit expected." },
-        Unexpected_token_expected: { code: 1179, category: ts.DiagnosticCategory.Error, key: "Unexpected_token_expected_1179", message: "Unexpected token. '{' expected." },
-        Property_destructuring_pattern_expected: { code: 1180, category: ts.DiagnosticCategory.Error, key: "Property_destructuring_pattern_expected_1180", message: "Property destructuring pattern expected." },
-        Array_element_destructuring_pattern_expected: { code: 1181, category: ts.DiagnosticCategory.Error, key: "Array_element_destructuring_pattern_expected_1181", message: "Array element destructuring pattern expected." },
-        A_destructuring_declaration_must_have_an_initializer: { code: 1182, category: ts.DiagnosticCategory.Error, key: "A_destructuring_declaration_must_have_an_initializer_1182", message: "A destructuring declaration must have an initializer." },
-        An_implementation_cannot_be_declared_in_ambient_contexts: { code: 1183, category: ts.DiagnosticCategory.Error, key: "An_implementation_cannot_be_declared_in_ambient_contexts_1183", message: "An implementation cannot be declared in ambient contexts." },
-        Modifiers_cannot_appear_here: { code: 1184, category: ts.DiagnosticCategory.Error, key: "Modifiers_cannot_appear_here_1184", message: "Modifiers cannot appear here." },
-        Merge_conflict_marker_encountered: { code: 1185, category: ts.DiagnosticCategory.Error, key: "Merge_conflict_marker_encountered_1185", message: "Merge conflict marker encountered." },
-        A_rest_element_cannot_have_an_initializer: { code: 1186, category: ts.DiagnosticCategory.Error, key: "A_rest_element_cannot_have_an_initializer_1186", message: "A rest element cannot have an initializer." },
-        A_parameter_property_may_not_be_declared_using_a_binding_pattern: { code: 1187, category: ts.DiagnosticCategory.Error, key: "A_parameter_property_may_not_be_declared_using_a_binding_pattern_1187", message: "A parameter property may not be declared using a binding pattern." },
-        Only_a_single_variable_declaration_is_allowed_in_a_for_of_statement: { code: 1188, category: ts.DiagnosticCategory.Error, key: "Only_a_single_variable_declaration_is_allowed_in_a_for_of_statement_1188", message: "Only a single variable declaration is allowed in a 'for...of' statement." },
-        The_variable_declaration_of_a_for_in_statement_cannot_have_an_initializer: { code: 1189, category: ts.DiagnosticCategory.Error, key: "The_variable_declaration_of_a_for_in_statement_cannot_have_an_initializer_1189", message: "The variable declaration of a 'for...in' statement cannot have an initializer." },
-        The_variable_declaration_of_a_for_of_statement_cannot_have_an_initializer: { code: 1190, category: ts.DiagnosticCategory.Error, key: "The_variable_declaration_of_a_for_of_statement_cannot_have_an_initializer_1190", message: "The variable declaration of a 'for...of' statement cannot have an initializer." },
-        An_import_declaration_cannot_have_modifiers: { code: 1191, category: ts.DiagnosticCategory.Error, key: "An_import_declaration_cannot_have_modifiers_1191", message: "An import declaration cannot have modifiers." },
-        Module_0_has_no_default_export: { code: 1192, category: ts.DiagnosticCategory.Error, key: "Module_0_has_no_default_export_1192", message: "Module '{0}' has no default export." },
-        An_export_declaration_cannot_have_modifiers: { code: 1193, category: ts.DiagnosticCategory.Error, key: "An_export_declaration_cannot_have_modifiers_1193", message: "An export declaration cannot have modifiers." },
-        Export_declarations_are_not_permitted_in_a_namespace: { code: 1194, category: ts.DiagnosticCategory.Error, key: "Export_declarations_are_not_permitted_in_a_namespace_1194", message: "Export declarations are not permitted in a namespace." },
-        Catch_clause_variable_name_must_be_an_identifier: { code: 1195, category: ts.DiagnosticCategory.Error, key: "Catch_clause_variable_name_must_be_an_identifier_1195", message: "Catch clause variable name must be an identifier." },
-        Catch_clause_variable_cannot_have_a_type_annotation: { code: 1196, category: ts.DiagnosticCategory.Error, key: "Catch_clause_variable_cannot_have_a_type_annotation_1196", message: "Catch clause variable cannot have a type annotation." },
-        Catch_clause_variable_cannot_have_an_initializer: { code: 1197, category: ts.DiagnosticCategory.Error, key: "Catch_clause_variable_cannot_have_an_initializer_1197", message: "Catch clause variable cannot have an initializer." },
-        An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive: { code: 1198, category: ts.DiagnosticCategory.Error, key: "An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive_1198", message: "An extended Unicode escape value must be between 0x0 and 0x10FFFF inclusive." },
-        Unterminated_Unicode_escape_sequence: { code: 1199, category: ts.DiagnosticCategory.Error, key: "Unterminated_Unicode_escape_sequence_1199", message: "Unterminated Unicode escape sequence." },
-        Line_terminator_not_permitted_before_arrow: { code: 1200, category: ts.DiagnosticCategory.Error, key: "Line_terminator_not_permitted_before_arrow_1200", message: "Line terminator not permitted before arrow." },
-        Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead: { code: 1202, category: ts.DiagnosticCategory.Error, key: "Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asteri_1202", message: "Import assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'import * as ns from \"mod\"', 'import {a} from \"mod\"', 'import d from \"mod\"', or another module format instead." },
-        Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_or_another_module_format_instead: { code: 1203, category: ts.DiagnosticCategory.Error, key: "Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_defaul_1203", message: "Export assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'export default' or another module format instead." },
-        Decorators_are_not_valid_here: { code: 1206, category: ts.DiagnosticCategory.Error, key: "Decorators_are_not_valid_here_1206", message: "Decorators are not valid here." },
-        Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name: { code: 1207, category: ts.DiagnosticCategory.Error, key: "Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name_1207", message: "Decorators cannot be applied to multiple get/set accessors of the same name." },
-        Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided: { code: 1208, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided_1208", message: "Cannot compile namespaces when the '--isolatedModules' flag is provided." },
-        Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided: { code: 1209, category: ts.DiagnosticCategory.Error, key: "Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided_1209", message: "Ambient const enums are not allowed when the '--isolatedModules' flag is provided." },
-        Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode: { code: 1210, category: ts.DiagnosticCategory.Error, key: "Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode_1210", message: "Invalid use of '{0}'. Class definitions are automatically in strict mode." },
-        A_class_declaration_without_the_default_modifier_must_have_a_name: { code: 1211, category: ts.DiagnosticCategory.Error, key: "A_class_declaration_without_the_default_modifier_must_have_a_name_1211", message: "A class declaration without the 'default' modifier must have a name" },
-        Identifier_expected_0_is_a_reserved_word_in_strict_mode: { code: 1212, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_0_is_a_reserved_word_in_strict_mode_1212", message: "Identifier expected. '{0}' is a reserved word in strict mode" },
-        Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_strict_mode: { code: 1213, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_stric_1213", message: "Identifier expected. '{0}' is a reserved word in strict mode. Class definitions are automatically in strict mode." },
-        Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode: { code: 1214, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode_1214", message: "Identifier expected. '{0}' is a reserved word in strict mode. Modules are automatically in strict mode." },
-        Invalid_use_of_0_Modules_are_automatically_in_strict_mode: { code: 1215, category: ts.DiagnosticCategory.Error, key: "Invalid_use_of_0_Modules_are_automatically_in_strict_mode_1215", message: "Invalid use of '{0}'. Modules are automatically in strict mode." },
-        Export_assignment_is_not_supported_when_module_flag_is_system: { code: 1218, category: ts.DiagnosticCategory.Error, key: "Export_assignment_is_not_supported_when_module_flag_is_system_1218", message: "Export assignment is not supported when '--module' flag is 'system'." },
-        Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning: { code: 1219, category: ts.DiagnosticCategory.Error, key: "Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_t_1219", message: "Experimental support for decorators is a feature that is subject to change in a future release. Set the 'experimentalDecorators' option to remove this warning." },
-        Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher: { code: 1220, category: ts.DiagnosticCategory.Error, key: "Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher_1220", message: "Generators are only available when targeting ECMAScript 2015 or higher." },
-        Generators_are_not_allowed_in_an_ambient_context: { code: 1221, category: ts.DiagnosticCategory.Error, key: "Generators_are_not_allowed_in_an_ambient_context_1221", message: "Generators are not allowed in an ambient context." },
-        An_overload_signature_cannot_be_declared_as_a_generator: { code: 1222, category: ts.DiagnosticCategory.Error, key: "An_overload_signature_cannot_be_declared_as_a_generator_1222", message: "An overload signature cannot be declared as a generator." },
-        _0_tag_already_specified: { code: 1223, category: ts.DiagnosticCategory.Error, key: "_0_tag_already_specified_1223", message: "'{0}' tag already specified." },
-        Signature_0_must_have_a_type_predicate: { code: 1224, category: ts.DiagnosticCategory.Error, key: "Signature_0_must_have_a_type_predicate_1224", message: "Signature '{0}' must have a type predicate." },
-        Cannot_find_parameter_0: { code: 1225, category: ts.DiagnosticCategory.Error, key: "Cannot_find_parameter_0_1225", message: "Cannot find parameter '{0}'." },
-        Type_predicate_0_is_not_assignable_to_1: { code: 1226, category: ts.DiagnosticCategory.Error, key: "Type_predicate_0_is_not_assignable_to_1_1226", message: "Type predicate '{0}' is not assignable to '{1}'." },
-        Parameter_0_is_not_in_the_same_position_as_parameter_1: { code: 1227, category: ts.DiagnosticCategory.Error, key: "Parameter_0_is_not_in_the_same_position_as_parameter_1_1227", message: "Parameter '{0}' is not in the same position as parameter '{1}'." },
-        A_type_predicate_is_only_allowed_in_return_type_position_for_functions_and_methods: { code: 1228, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_is_only_allowed_in_return_type_position_for_functions_and_methods_1228", message: "A type predicate is only allowed in return type position for functions and methods." },
-        A_type_predicate_cannot_reference_a_rest_parameter: { code: 1229, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_cannot_reference_a_rest_parameter_1229", message: "A type predicate cannot reference a rest parameter." },
-        A_type_predicate_cannot_reference_element_0_in_a_binding_pattern: { code: 1230, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_cannot_reference_element_0_in_a_binding_pattern_1230", message: "A type predicate cannot reference element '{0}' in a binding pattern." },
-        An_export_assignment_can_only_be_used_in_a_module: { code: 1231, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_can_only_be_used_in_a_module_1231", message: "An export assignment can only be used in a module." },
-        An_import_declaration_can_only_be_used_in_a_namespace_or_module: { code: 1232, category: ts.DiagnosticCategory.Error, key: "An_import_declaration_can_only_be_used_in_a_namespace_or_module_1232", message: "An import declaration can only be used in a namespace or module." },
-        An_export_declaration_can_only_be_used_in_a_module: { code: 1233, category: ts.DiagnosticCategory.Error, key: "An_export_declaration_can_only_be_used_in_a_module_1233", message: "An export declaration can only be used in a module." },
-        An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file: { code: 1234, category: ts.DiagnosticCategory.Error, key: "An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file_1234", message: "An ambient module declaration is only allowed at the top level in a file." },
-        A_namespace_declaration_is_only_allowed_in_a_namespace_or_module: { code: 1235, category: ts.DiagnosticCategory.Error, key: "A_namespace_declaration_is_only_allowed_in_a_namespace_or_module_1235", message: "A namespace declaration is only allowed in a namespace or module." },
-        The_return_type_of_a_property_decorator_function_must_be_either_void_or_any: { code: 1236, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_a_property_decorator_function_must_be_either_void_or_any_1236", message: "The return type of a property decorator function must be either 'void' or 'any'." },
-        The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any: { code: 1237, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any_1237", message: "The return type of a parameter decorator function must be either 'void' or 'any'." },
-        Unable_to_resolve_signature_of_class_decorator_when_called_as_an_expression: { code: 1238, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_class_decorator_when_called_as_an_expression_1238", message: "Unable to resolve signature of class decorator when called as an expression." },
-        Unable_to_resolve_signature_of_parameter_decorator_when_called_as_an_expression: { code: 1239, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_parameter_decorator_when_called_as_an_expression_1239", message: "Unable to resolve signature of parameter decorator when called as an expression." },
-        Unable_to_resolve_signature_of_property_decorator_when_called_as_an_expression: { code: 1240, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_property_decorator_when_called_as_an_expression_1240", message: "Unable to resolve signature of property decorator when called as an expression." },
-        Unable_to_resolve_signature_of_method_decorator_when_called_as_an_expression: { code: 1241, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_method_decorator_when_called_as_an_expression_1241", message: "Unable to resolve signature of method decorator when called as an expression." },
-        abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration: { code: 1242, category: ts.DiagnosticCategory.Error, key: "abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration_1242", message: "'abstract' modifier can only appear on a class, method, or property declaration." },
-        _0_modifier_cannot_be_used_with_1_modifier: { code: 1243, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_with_1_modifier_1243", message: "'{0}' modifier cannot be used with '{1}' modifier." },
-        Abstract_methods_can_only_appear_within_an_abstract_class: { code: 1244, category: ts.DiagnosticCategory.Error, key: "Abstract_methods_can_only_appear_within_an_abstract_class_1244", message: "Abstract methods can only appear within an abstract class." },
-        Method_0_cannot_have_an_implementation_because_it_is_marked_abstract: { code: 1245, category: ts.DiagnosticCategory.Error, key: "Method_0_cannot_have_an_implementation_because_it_is_marked_abstract_1245", message: "Method '{0}' cannot have an implementation because it is marked abstract." },
-        An_interface_property_cannot_have_an_initializer: { code: 1246, category: ts.DiagnosticCategory.Error, key: "An_interface_property_cannot_have_an_initializer_1246", message: "An interface property cannot have an initializer." },
-        A_type_literal_property_cannot_have_an_initializer: { code: 1247, category: ts.DiagnosticCategory.Error, key: "A_type_literal_property_cannot_have_an_initializer_1247", message: "A type literal property cannot have an initializer." },
-        A_class_member_cannot_have_the_0_keyword: { code: 1248, category: ts.DiagnosticCategory.Error, key: "A_class_member_cannot_have_the_0_keyword_1248", message: "A class member cannot have the '{0}' keyword." },
-        A_decorator_can_only_decorate_a_method_implementation_not_an_overload: { code: 1249, category: ts.DiagnosticCategory.Error, key: "A_decorator_can_only_decorate_a_method_implementation_not_an_overload_1249", message: "A decorator can only decorate a method implementation, not an overload." },
-        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5: { code: 1250, category: ts.DiagnosticCategory.Error, key: "Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_1250", message: "Function declarations are not allowed inside blocks in strict mode when targeting 'ES3' or 'ES5'." },
-        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Class_definitions_are_automatically_in_strict_mode: { code: 1251, category: ts.DiagnosticCategory.Error, key: "Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Class_d_1251", message: "Function declarations are not allowed inside blocks in strict mode when targeting 'ES3' or 'ES5'. Class definitions are automatically in strict mode." },
-        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_are_automatically_in_strict_mode: { code: 1252, category: ts.DiagnosticCategory.Error, key: "Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_1252", message: "Function declarations are not allowed inside blocks in strict mode when targeting 'ES3' or 'ES5'. Modules are automatically in strict mode." },
-        _0_tag_cannot_be_used_independently_as_a_top_level_JSDoc_tag: { code: 1253, category: ts.DiagnosticCategory.Error, key: "_0_tag_cannot_be_used_independently_as_a_top_level_JSDoc_tag_1253", message: "'{0}' tag cannot be used independently as a top level JSDoc tag." },
-        A_const_initializer_in_an_ambient_context_must_be_a_string_or_numeric_literal: { code: 1254, category: ts.DiagnosticCategory.Error, key: "A_const_initializer_in_an_ambient_context_must_be_a_string_or_numeric_literal_1254", message: "A 'const' initializer in an ambient context must be a string or numeric literal." },
-        with_statements_are_not_allowed_in_an_async_function_block: { code: 1300, category: ts.DiagnosticCategory.Error, key: "with_statements_are_not_allowed_in_an_async_function_block_1300", message: "'with' statements are not allowed in an async function block." },
-        await_expression_is_only_allowed_within_an_async_function: { code: 1308, category: ts.DiagnosticCategory.Error, key: "await_expression_is_only_allowed_within_an_async_function_1308", message: "'await' expression is only allowed within an async function." },
-        can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment: { code: 1312, category: ts.DiagnosticCategory.Error, key: "can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment_1312", message: "'=' can only be used in an object literal property inside a destructuring assignment." },
-        The_body_of_an_if_statement_cannot_be_the_empty_statement: { code: 1313, category: ts.DiagnosticCategory.Error, key: "The_body_of_an_if_statement_cannot_be_the_empty_statement_1313", message: "The body of an 'if' statement cannot be the empty statement." },
-        Global_module_exports_may_only_appear_in_module_files: { code: 1314, category: ts.DiagnosticCategory.Error, key: "Global_module_exports_may_only_appear_in_module_files_1314", message: "Global module exports may only appear in module files." },
-        Global_module_exports_may_only_appear_in_declaration_files: { code: 1315, category: ts.DiagnosticCategory.Error, key: "Global_module_exports_may_only_appear_in_declaration_files_1315", message: "Global module exports may only appear in declaration files." },
-        Global_module_exports_may_only_appear_at_top_level: { code: 1316, category: ts.DiagnosticCategory.Error, key: "Global_module_exports_may_only_appear_at_top_level_1316", message: "Global module exports may only appear at top level." },
-        A_parameter_property_cannot_be_declared_using_a_rest_parameter: { code: 1317, category: ts.DiagnosticCategory.Error, key: "A_parameter_property_cannot_be_declared_using_a_rest_parameter_1317", message: "A parameter property cannot be declared using a rest parameter." },
-        Duplicate_identifier_0: { code: 2300, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_2300", message: "Duplicate identifier '{0}'." },
-        Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor: { code: 2301, category: ts.DiagnosticCategory.Error, key: "Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor_2301", message: "Initializer of instance member variable '{0}' cannot reference identifier '{1}' declared in the constructor." },
-        Static_members_cannot_reference_class_type_parameters: { code: 2302, category: ts.DiagnosticCategory.Error, key: "Static_members_cannot_reference_class_type_parameters_2302", message: "Static members cannot reference class type parameters." },
-        Circular_definition_of_import_alias_0: { code: 2303, category: ts.DiagnosticCategory.Error, key: "Circular_definition_of_import_alias_0_2303", message: "Circular definition of import alias '{0}'." },
-        Cannot_find_name_0: { code: 2304, category: ts.DiagnosticCategory.Error, key: "Cannot_find_name_0_2304", message: "Cannot find name '{0}'." },
-        Module_0_has_no_exported_member_1: { code: 2305, category: ts.DiagnosticCategory.Error, key: "Module_0_has_no_exported_member_1_2305", message: "Module '{0}' has no exported member '{1}'." },
-        File_0_is_not_a_module: { code: 2306, category: ts.DiagnosticCategory.Error, key: "File_0_is_not_a_module_2306", message: "File '{0}' is not a module." },
-        Cannot_find_module_0: { code: 2307, category: ts.DiagnosticCategory.Error, key: "Cannot_find_module_0_2307", message: "Cannot find module '{0}'." },
-        Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambiguity: { code: 2308, category: ts.DiagnosticCategory.Error, key: "Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambig_2308", message: "Module {0} has already exported a member named '{1}'. Consider explicitly re-exporting to resolve the ambiguity." },
-        An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements: { code: 2309, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements_2309", message: "An export assignment cannot be used in a module with other exported elements." },
-        Type_0_recursively_references_itself_as_a_base_type: { code: 2310, category: ts.DiagnosticCategory.Error, key: "Type_0_recursively_references_itself_as_a_base_type_2310", message: "Type '{0}' recursively references itself as a base type." },
-        A_class_may_only_extend_another_class: { code: 2311, category: ts.DiagnosticCategory.Error, key: "A_class_may_only_extend_another_class_2311", message: "A class may only extend another class." },
-        An_interface_may_only_extend_a_class_or_another_interface: { code: 2312, category: ts.DiagnosticCategory.Error, key: "An_interface_may_only_extend_a_class_or_another_interface_2312", message: "An interface may only extend a class or another interface." },
-        Type_parameter_0_has_a_circular_constraint: { code: 2313, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_has_a_circular_constraint_2313", message: "Type parameter '{0}' has a circular constraint." },
-        Generic_type_0_requires_1_type_argument_s: { code: 2314, category: ts.DiagnosticCategory.Error, key: "Generic_type_0_requires_1_type_argument_s_2314", message: "Generic type '{0}' requires {1} type argument(s)." },
-        Type_0_is_not_generic: { code: 2315, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_generic_2315", message: "Type '{0}' is not generic." },
-        Global_type_0_must_be_a_class_or_interface_type: { code: 2316, category: ts.DiagnosticCategory.Error, key: "Global_type_0_must_be_a_class_or_interface_type_2316", message: "Global type '{0}' must be a class or interface type." },
-        Global_type_0_must_have_1_type_parameter_s: { code: 2317, category: ts.DiagnosticCategory.Error, key: "Global_type_0_must_have_1_type_parameter_s_2317", message: "Global type '{0}' must have {1} type parameter(s)." },
-        Cannot_find_global_type_0: { code: 2318, category: ts.DiagnosticCategory.Error, key: "Cannot_find_global_type_0_2318", message: "Cannot find global type '{0}'." },
-        Named_property_0_of_types_1_and_2_are_not_identical: { code: 2319, category: ts.DiagnosticCategory.Error, key: "Named_property_0_of_types_1_and_2_are_not_identical_2319", message: "Named property '{0}' of types '{1}' and '{2}' are not identical." },
-        Interface_0_cannot_simultaneously_extend_types_1_and_2: { code: 2320, category: ts.DiagnosticCategory.Error, key: "Interface_0_cannot_simultaneously_extend_types_1_and_2_2320", message: "Interface '{0}' cannot simultaneously extend types '{1}' and '{2}'." },
-        Excessive_stack_depth_comparing_types_0_and_1: { code: 2321, category: ts.DiagnosticCategory.Error, key: "Excessive_stack_depth_comparing_types_0_and_1_2321", message: "Excessive stack depth comparing types '{0}' and '{1}'." },
-        Type_0_is_not_assignable_to_type_1: { code: 2322, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_assignable_to_type_1_2322", message: "Type '{0}' is not assignable to type '{1}'." },
-        Cannot_redeclare_exported_variable_0: { code: 2323, category: ts.DiagnosticCategory.Error, key: "Cannot_redeclare_exported_variable_0_2323", message: "Cannot redeclare exported variable '{0}'." },
-        Property_0_is_missing_in_type_1: { code: 2324, category: ts.DiagnosticCategory.Error, key: "Property_0_is_missing_in_type_1_2324", message: "Property '{0}' is missing in type '{1}'." },
-        Property_0_is_private_in_type_1_but_not_in_type_2: { code: 2325, category: ts.DiagnosticCategory.Error, key: "Property_0_is_private_in_type_1_but_not_in_type_2_2325", message: "Property '{0}' is private in type '{1}' but not in type '{2}'." },
-        Types_of_property_0_are_incompatible: { code: 2326, category: ts.DiagnosticCategory.Error, key: "Types_of_property_0_are_incompatible_2326", message: "Types of property '{0}' are incompatible." },
-        Property_0_is_optional_in_type_1_but_required_in_type_2: { code: 2327, category: ts.DiagnosticCategory.Error, key: "Property_0_is_optional_in_type_1_but_required_in_type_2_2327", message: "Property '{0}' is optional in type '{1}' but required in type '{2}'." },
-        Types_of_parameters_0_and_1_are_incompatible: { code: 2328, category: ts.DiagnosticCategory.Error, key: "Types_of_parameters_0_and_1_are_incompatible_2328", message: "Types of parameters '{0}' and '{1}' are incompatible." },
-        Index_signature_is_missing_in_type_0: { code: 2329, category: ts.DiagnosticCategory.Error, key: "Index_signature_is_missing_in_type_0_2329", message: "Index signature is missing in type '{0}'." },
-        Index_signatures_are_incompatible: { code: 2330, category: ts.DiagnosticCategory.Error, key: "Index_signatures_are_incompatible_2330", message: "Index signatures are incompatible." },
-        this_cannot_be_referenced_in_a_module_or_namespace_body: { code: 2331, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_a_module_or_namespace_body_2331", message: "'this' cannot be referenced in a module or namespace body." },
-        this_cannot_be_referenced_in_current_location: { code: 2332, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_current_location_2332", message: "'this' cannot be referenced in current location." },
-        this_cannot_be_referenced_in_constructor_arguments: { code: 2333, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_constructor_arguments_2333", message: "'this' cannot be referenced in constructor arguments." },
-        this_cannot_be_referenced_in_a_static_property_initializer: { code: 2334, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_a_static_property_initializer_2334", message: "'this' cannot be referenced in a static property initializer." },
-        super_can_only_be_referenced_in_a_derived_class: { code: 2335, category: ts.DiagnosticCategory.Error, key: "super_can_only_be_referenced_in_a_derived_class_2335", message: "'super' can only be referenced in a derived class." },
-        super_cannot_be_referenced_in_constructor_arguments: { code: 2336, category: ts.DiagnosticCategory.Error, key: "super_cannot_be_referenced_in_constructor_arguments_2336", message: "'super' cannot be referenced in constructor arguments." },
-        Super_calls_are_not_permitted_outside_constructors_or_in_nested_functions_inside_constructors: { code: 2337, category: ts.DiagnosticCategory.Error, key: "Super_calls_are_not_permitted_outside_constructors_or_in_nested_functions_inside_constructors_2337", message: "Super calls are not permitted outside constructors or in nested functions inside constructors." },
-        super_property_access_is_permitted_only_in_a_constructor_member_function_or_member_accessor_of_a_derived_class: { code: 2338, category: ts.DiagnosticCategory.Error, key: "super_property_access_is_permitted_only_in_a_constructor_member_function_or_member_accessor_of_a_der_2338", message: "'super' property access is permitted only in a constructor, member function, or member accessor of a derived class." },
-        Property_0_does_not_exist_on_type_1: { code: 2339, category: ts.DiagnosticCategory.Error, key: "Property_0_does_not_exist_on_type_1_2339", message: "Property '{0}' does not exist on type '{1}'." },
-        Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword: { code: 2340, category: ts.DiagnosticCategory.Error, key: "Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword_2340", message: "Only public and protected methods of the base class are accessible via the 'super' keyword." },
-        Property_0_is_private_and_only_accessible_within_class_1: { code: 2341, category: ts.DiagnosticCategory.Error, key: "Property_0_is_private_and_only_accessible_within_class_1_2341", message: "Property '{0}' is private and only accessible within class '{1}'." },
-        An_index_expression_argument_must_be_of_type_string_number_symbol_or_any: { code: 2342, category: ts.DiagnosticCategory.Error, key: "An_index_expression_argument_must_be_of_type_string_number_symbol_or_any_2342", message: "An index expression argument must be of type 'string', 'number', 'symbol', or 'any'." },
-        Type_0_does_not_satisfy_the_constraint_1: { code: 2344, category: ts.DiagnosticCategory.Error, key: "Type_0_does_not_satisfy_the_constraint_1_2344", message: "Type '{0}' does not satisfy the constraint '{1}'." },
-        Argument_of_type_0_is_not_assignable_to_parameter_of_type_1: { code: 2345, category: ts.DiagnosticCategory.Error, key: "Argument_of_type_0_is_not_assignable_to_parameter_of_type_1_2345", message: "Argument of type '{0}' is not assignable to parameter of type '{1}'." },
-        Supplied_parameters_do_not_match_any_signature_of_call_target: { code: 2346, category: ts.DiagnosticCategory.Error, key: "Supplied_parameters_do_not_match_any_signature_of_call_target_2346", message: "Supplied parameters do not match any signature of call target." },
-        Untyped_function_calls_may_not_accept_type_arguments: { code: 2347, category: ts.DiagnosticCategory.Error, key: "Untyped_function_calls_may_not_accept_type_arguments_2347", message: "Untyped function calls may not accept type arguments." },
-        Value_of_type_0_is_not_callable_Did_you_mean_to_include_new: { code: 2348, category: ts.DiagnosticCategory.Error, key: "Value_of_type_0_is_not_callable_Did_you_mean_to_include_new_2348", message: "Value of type '{0}' is not callable. Did you mean to include 'new'?" },
-        Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures: { code: 2349, category: ts.DiagnosticCategory.Error, key: "Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatur_2349", message: "Cannot invoke an expression whose type lacks a call signature. Type '{0}' has no compatible call signatures." },
-        Only_a_void_function_can_be_called_with_the_new_keyword: { code: 2350, category: ts.DiagnosticCategory.Error, key: "Only_a_void_function_can_be_called_with_the_new_keyword_2350", message: "Only a void function can be called with the 'new' keyword." },
-        Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature: { code: 2351, category: ts.DiagnosticCategory.Error, key: "Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature_2351", message: "Cannot use 'new' with an expression whose type lacks a call or construct signature." },
-        Type_0_cannot_be_converted_to_type_1: { code: 2352, category: ts.DiagnosticCategory.Error, key: "Type_0_cannot_be_converted_to_type_1_2352", message: "Type '{0}' cannot be converted to type '{1}'." },
-        Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1: { code: 2353, category: ts.DiagnosticCategory.Error, key: "Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1_2353", message: "Object literal may only specify known properties, and '{0}' does not exist in type '{1}'." },
-        A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value: { code: 2355, category: ts.DiagnosticCategory.Error, key: "A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value_2355", message: "A function whose declared type is neither 'void' nor 'any' must return a value." },
-        An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type: { code: 2356, category: ts.DiagnosticCategory.Error, key: "An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type_2356", message: "An arithmetic operand must be of type 'any', 'number' or an enum type." },
-        The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer: { code: 2357, category: ts.DiagnosticCategory.Error, key: "The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer_2357", message: "The operand of an increment or decrement operator must be a variable, property or indexer." },
-        The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_parameter: { code: 2358, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_paramete_2358", message: "The left-hand side of an 'instanceof' expression must be of type 'any', an object type or a type parameter." },
-        The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_Function_interface_type: { code: 2359, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_F_2359", message: "The right-hand side of an 'instanceof' expression must be of type 'any' or of a type assignable to the 'Function' interface type." },
-        The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol: { code: 2360, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol_2360", message: "The left-hand side of an 'in' expression must be of type 'any', 'string', 'number', or 'symbol'." },
-        The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter: { code: 2361, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter_2361", message: "The right-hand side of an 'in' expression must be of type 'any', an object type or a type parameter" },
-        The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type: { code: 2362, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type_2362", message: "The left-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type." },
-        The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type: { code: 2363, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type_2363", message: "The right-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type." },
-        Invalid_left_hand_side_of_assignment_expression: { code: 2364, category: ts.DiagnosticCategory.Error, key: "Invalid_left_hand_side_of_assignment_expression_2364", message: "Invalid left-hand side of assignment expression." },
-        Operator_0_cannot_be_applied_to_types_1_and_2: { code: 2365, category: ts.DiagnosticCategory.Error, key: "Operator_0_cannot_be_applied_to_types_1_and_2_2365", message: "Operator '{0}' cannot be applied to types '{1}' and '{2}'." },
-        Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined: { code: 2366, category: ts.DiagnosticCategory.Error, key: "Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined_2366", message: "Function lacks ending return statement and return type does not include 'undefined'." },
-        Type_parameter_name_cannot_be_0: { code: 2368, category: ts.DiagnosticCategory.Error, key: "Type_parameter_name_cannot_be_0_2368", message: "Type parameter name cannot be '{0}'" },
-        A_parameter_property_is_only_allowed_in_a_constructor_implementation: { code: 2369, category: ts.DiagnosticCategory.Error, key: "A_parameter_property_is_only_allowed_in_a_constructor_implementation_2369", message: "A parameter property is only allowed in a constructor implementation." },
-        A_rest_parameter_must_be_of_an_array_type: { code: 2370, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_must_be_of_an_array_type_2370", message: "A rest parameter must be of an array type." },
-        A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation: { code: 2371, category: ts.DiagnosticCategory.Error, key: "A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation_2371", message: "A parameter initializer is only allowed in a function or constructor implementation." },
-        Parameter_0_cannot_be_referenced_in_its_initializer: { code: 2372, category: ts.DiagnosticCategory.Error, key: "Parameter_0_cannot_be_referenced_in_its_initializer_2372", message: "Parameter '{0}' cannot be referenced in its initializer." },
-        Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it: { code: 2373, category: ts.DiagnosticCategory.Error, key: "Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it_2373", message: "Initializer of parameter '{0}' cannot reference identifier '{1}' declared after it." },
-        Duplicate_string_index_signature: { code: 2374, category: ts.DiagnosticCategory.Error, key: "Duplicate_string_index_signature_2374", message: "Duplicate string index signature." },
-        Duplicate_number_index_signature: { code: 2375, category: ts.DiagnosticCategory.Error, key: "Duplicate_number_index_signature_2375", message: "Duplicate number index signature." },
-        A_super_call_must_be_the_first_statement_in_the_constructor_when_a_class_contains_initialized_properties_or_has_parameter_properties: { code: 2376, category: ts.DiagnosticCategory.Error, key: "A_super_call_must_be_the_first_statement_in_the_constructor_when_a_class_contains_initialized_proper_2376", message: "A 'super' call must be the first statement in the constructor when a class contains initialized properties or has parameter properties." },
-        Constructors_for_derived_classes_must_contain_a_super_call: { code: 2377, category: ts.DiagnosticCategory.Error, key: "Constructors_for_derived_classes_must_contain_a_super_call_2377", message: "Constructors for derived classes must contain a 'super' call." },
-        A_get_accessor_must_return_a_value: { code: 2378, category: ts.DiagnosticCategory.Error, key: "A_get_accessor_must_return_a_value_2378", message: "A 'get' accessor must return a value." },
-        Getter_and_setter_accessors_do_not_agree_in_visibility: { code: 2379, category: ts.DiagnosticCategory.Error, key: "Getter_and_setter_accessors_do_not_agree_in_visibility_2379", message: "Getter and setter accessors do not agree in visibility." },
-        get_and_set_accessor_must_have_the_same_type: { code: 2380, category: ts.DiagnosticCategory.Error, key: "get_and_set_accessor_must_have_the_same_type_2380", message: "'get' and 'set' accessor must have the same type." },
-        A_signature_with_an_implementation_cannot_use_a_string_literal_type: { code: 2381, category: ts.DiagnosticCategory.Error, key: "A_signature_with_an_implementation_cannot_use_a_string_literal_type_2381", message: "A signature with an implementation cannot use a string literal type." },
-        Specialized_overload_signature_is_not_assignable_to_any_non_specialized_signature: { code: 2382, category: ts.DiagnosticCategory.Error, key: "Specialized_overload_signature_is_not_assignable_to_any_non_specialized_signature_2382", message: "Specialized overload signature is not assignable to any non-specialized signature." },
-        Overload_signatures_must_all_be_exported_or_non_exported: { code: 2383, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_exported_or_non_exported_2383", message: "Overload signatures must all be exported or non-exported." },
-        Overload_signatures_must_all_be_ambient_or_non_ambient: { code: 2384, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_ambient_or_non_ambient_2384", message: "Overload signatures must all be ambient or non-ambient." },
-        Overload_signatures_must_all_be_public_private_or_protected: { code: 2385, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_public_private_or_protected_2385", message: "Overload signatures must all be public, private or protected." },
-        Overload_signatures_must_all_be_optional_or_required: { code: 2386, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_optional_or_required_2386", message: "Overload signatures must all be optional or required." },
-        Function_overload_must_be_static: { code: 2387, category: ts.DiagnosticCategory.Error, key: "Function_overload_must_be_static_2387", message: "Function overload must be static." },
-        Function_overload_must_not_be_static: { code: 2388, category: ts.DiagnosticCategory.Error, key: "Function_overload_must_not_be_static_2388", message: "Function overload must not be static." },
-        Function_implementation_name_must_be_0: { code: 2389, category: ts.DiagnosticCategory.Error, key: "Function_implementation_name_must_be_0_2389", message: "Function implementation name must be '{0}'." },
-        Constructor_implementation_is_missing: { code: 2390, category: ts.DiagnosticCategory.Error, key: "Constructor_implementation_is_missing_2390", message: "Constructor implementation is missing." },
-        Function_implementation_is_missing_or_not_immediately_following_the_declaration: { code: 2391, category: ts.DiagnosticCategory.Error, key: "Function_implementation_is_missing_or_not_immediately_following_the_declaration_2391", message: "Function implementation is missing or not immediately following the declaration." },
-        Multiple_constructor_implementations_are_not_allowed: { code: 2392, category: ts.DiagnosticCategory.Error, key: "Multiple_constructor_implementations_are_not_allowed_2392", message: "Multiple constructor implementations are not allowed." },
-        Duplicate_function_implementation: { code: 2393, category: ts.DiagnosticCategory.Error, key: "Duplicate_function_implementation_2393", message: "Duplicate function implementation." },
-        Overload_signature_is_not_compatible_with_function_implementation: { code: 2394, category: ts.DiagnosticCategory.Error, key: "Overload_signature_is_not_compatible_with_function_implementation_2394", message: "Overload signature is not compatible with function implementation." },
-        Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local: { code: 2395, category: ts.DiagnosticCategory.Error, key: "Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local_2395", message: "Individual declarations in merged declaration '{0}' must be all exported or all local." },
-        Duplicate_identifier_arguments_Compiler_uses_arguments_to_initialize_rest_parameters: { code: 2396, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_arguments_Compiler_uses_arguments_to_initialize_rest_parameters_2396", message: "Duplicate identifier 'arguments'. Compiler uses 'arguments' to initialize rest parameters." },
-        Declaration_name_conflicts_with_built_in_global_identifier_0: { code: 2397, category: ts.DiagnosticCategory.Error, key: "Declaration_name_conflicts_with_built_in_global_identifier_0_2397", message: "Declaration name conflicts with built-in global identifier '{0}'." },
-        Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference: { code: 2399, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference_2399", message: "Duplicate identifier '_this'. Compiler uses variable declaration '_this' to capture 'this' reference." },
-        Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference: { code: 2400, category: ts.DiagnosticCategory.Error, key: "Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference_2400", message: "Expression resolves to variable declaration '_this' that compiler uses to capture 'this' reference." },
-        Duplicate_identifier_super_Compiler_uses_super_to_capture_base_class_reference: { code: 2401, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_super_Compiler_uses_super_to_capture_base_class_reference_2401", message: "Duplicate identifier '_super'. Compiler uses '_super' to capture base class reference." },
-        Expression_resolves_to_super_that_compiler_uses_to_capture_base_class_reference: { code: 2402, category: ts.DiagnosticCategory.Error, key: "Expression_resolves_to_super_that_compiler_uses_to_capture_base_class_reference_2402", message: "Expression resolves to '_super' that compiler uses to capture base class reference." },
-        Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_type_2: { code: 2403, category: ts.DiagnosticCategory.Error, key: "Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_t_2403", message: "Subsequent variable declarations must have the same type.  Variable '{0}' must be of type '{1}', but here has type '{2}'." },
-        The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation: { code: 2404, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation_2404", message: "The left-hand side of a 'for...in' statement cannot use a type annotation." },
-        The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any: { code: 2405, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any_2405", message: "The left-hand side of a 'for...in' statement must be of type 'string' or 'any'." },
-        Invalid_left_hand_side_in_for_in_statement: { code: 2406, category: ts.DiagnosticCategory.Error, key: "Invalid_left_hand_side_in_for_in_statement_2406", message: "Invalid left-hand side in 'for...in' statement." },
-        The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter: { code: 2407, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter_2407", message: "The right-hand side of a 'for...in' statement must be of type 'any', an object type or a type parameter." },
-        Setters_cannot_return_a_value: { code: 2408, category: ts.DiagnosticCategory.Error, key: "Setters_cannot_return_a_value_2408", message: "Setters cannot return a value." },
-        Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class: { code: 2409, category: ts.DiagnosticCategory.Error, key: "Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class_2409", message: "Return type of constructor signature must be assignable to the instance type of the class" },
-        The_with_statement_is_not_supported_All_symbols_in_a_with_block_will_have_type_any: { code: 2410, category: ts.DiagnosticCategory.Error, key: "The_with_statement_is_not_supported_All_symbols_in_a_with_block_will_have_type_any_2410", message: "The 'with' statement is not supported. All symbols in a 'with' block will have type 'any'." },
-        Property_0_of_type_1_is_not_assignable_to_string_index_type_2: { code: 2411, category: ts.DiagnosticCategory.Error, key: "Property_0_of_type_1_is_not_assignable_to_string_index_type_2_2411", message: "Property '{0}' of type '{1}' is not assignable to string index type '{2}'." },
-        Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2: { code: 2412, category: ts.DiagnosticCategory.Error, key: "Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2_2412", message: "Property '{0}' of type '{1}' is not assignable to numeric index type '{2}'." },
-        Numeric_index_type_0_is_not_assignable_to_string_index_type_1: { code: 2413, category: ts.DiagnosticCategory.Error, key: "Numeric_index_type_0_is_not_assignable_to_string_index_type_1_2413", message: "Numeric index type '{0}' is not assignable to string index type '{1}'." },
-        Class_name_cannot_be_0: { code: 2414, category: ts.DiagnosticCategory.Error, key: "Class_name_cannot_be_0_2414", message: "Class name cannot be '{0}'" },
-        Class_0_incorrectly_extends_base_class_1: { code: 2415, category: ts.DiagnosticCategory.Error, key: "Class_0_incorrectly_extends_base_class_1_2415", message: "Class '{0}' incorrectly extends base class '{1}'." },
-        Class_static_side_0_incorrectly_extends_base_class_static_side_1: { code: 2417, category: ts.DiagnosticCategory.Error, key: "Class_static_side_0_incorrectly_extends_base_class_static_side_1_2417", message: "Class static side '{0}' incorrectly extends base class static side '{1}'." },
-        Class_0_incorrectly_implements_interface_1: { code: 2420, category: ts.DiagnosticCategory.Error, key: "Class_0_incorrectly_implements_interface_1_2420", message: "Class '{0}' incorrectly implements interface '{1}'." },
-        A_class_may_only_implement_another_class_or_interface: { code: 2422, category: ts.DiagnosticCategory.Error, key: "A_class_may_only_implement_another_class_or_interface_2422", message: "A class may only implement another class or interface." },
-        Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_accessor: { code: 2423, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_access_2423", message: "Class '{0}' defines instance member function '{1}', but extended class '{2}' defines it as instance member accessor." },
-        Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_property: { code: 2424, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_proper_2424", message: "Class '{0}' defines instance member function '{1}', but extended class '{2}' defines it as instance member property." },
-        Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_function: { code: 2425, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_functi_2425", message: "Class '{0}' defines instance member property '{1}', but extended class '{2}' defines it as instance member function." },
-        Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_function: { code: 2426, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_functi_2426", message: "Class '{0}' defines instance member accessor '{1}', but extended class '{2}' defines it as instance member function." },
-        Interface_name_cannot_be_0: { code: 2427, category: ts.DiagnosticCategory.Error, key: "Interface_name_cannot_be_0_2427", message: "Interface name cannot be '{0}'" },
-        All_declarations_of_0_must_have_identical_type_parameters: { code: 2428, category: ts.DiagnosticCategory.Error, key: "All_declarations_of_0_must_have_identical_type_parameters_2428", message: "All declarations of '{0}' must have identical type parameters." },
-        Interface_0_incorrectly_extends_interface_1: { code: 2430, category: ts.DiagnosticCategory.Error, key: "Interface_0_incorrectly_extends_interface_1_2430", message: "Interface '{0}' incorrectly extends interface '{1}'." },
-        Enum_name_cannot_be_0: { code: 2431, category: ts.DiagnosticCategory.Error, key: "Enum_name_cannot_be_0_2431", message: "Enum name cannot be '{0}'" },
-        In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enum_element: { code: 2432, category: ts.DiagnosticCategory.Error, key: "In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enu_2432", message: "In an enum with multiple declarations, only one declaration can omit an initializer for its first enum element." },
-        A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merged: { code: 2433, category: ts.DiagnosticCategory.Error, key: "A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merg_2433", message: "A namespace declaration cannot be in a different file from a class or function with which it is merged" },
-        A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged: { code: 2434, category: ts.DiagnosticCategory.Error, key: "A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged_2434", message: "A namespace declaration cannot be located prior to a class or function with which it is merged" },
-        Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces: { code: 2435, category: ts.DiagnosticCategory.Error, key: "Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces_2435", message: "Ambient modules cannot be nested in other modules or namespaces." },
-        Ambient_module_declaration_cannot_specify_relative_module_name: { code: 2436, category: ts.DiagnosticCategory.Error, key: "Ambient_module_declaration_cannot_specify_relative_module_name_2436", message: "Ambient module declaration cannot specify relative module name." },
-        Module_0_is_hidden_by_a_local_declaration_with_the_same_name: { code: 2437, category: ts.DiagnosticCategory.Error, key: "Module_0_is_hidden_by_a_local_declaration_with_the_same_name_2437", message: "Module '{0}' is hidden by a local declaration with the same name" },
-        Import_name_cannot_be_0: { code: 2438, category: ts.DiagnosticCategory.Error, key: "Import_name_cannot_be_0_2438", message: "Import name cannot be '{0}'" },
-        Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relative_module_name: { code: 2439, category: ts.DiagnosticCategory.Error, key: "Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relati_2439", message: "Import or export declaration in an ambient module declaration cannot reference module through relative module name." },
-        Import_declaration_conflicts_with_local_declaration_of_0: { code: 2440, category: ts.DiagnosticCategory.Error, key: "Import_declaration_conflicts_with_local_declaration_of_0_2440", message: "Import declaration conflicts with local declaration of '{0}'" },
-        Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module: { code: 2441, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_2441", message: "Duplicate identifier '{0}'. Compiler reserves name '{1}' in top level scope of a module." },
-        Types_have_separate_declarations_of_a_private_property_0: { code: 2442, category: ts.DiagnosticCategory.Error, key: "Types_have_separate_declarations_of_a_private_property_0_2442", message: "Types have separate declarations of a private property '{0}'." },
-        Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2: { code: 2443, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2_2443", message: "Property '{0}' is protected but type '{1}' is not a class derived from '{2}'." },
-        Property_0_is_protected_in_type_1_but_public_in_type_2: { code: 2444, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_in_type_1_but_public_in_type_2_2444", message: "Property '{0}' is protected in type '{1}' but public in type '{2}'." },
-        Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses: { code: 2445, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses_2445", message: "Property '{0}' is protected and only accessible within class '{1}' and its subclasses." },
-        Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1: { code: 2446, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1_2446", message: "Property '{0}' is protected and only accessible through an instance of class '{1}'." },
-        The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead: { code: 2447, category: ts.DiagnosticCategory.Error, key: "The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead_2447", message: "The '{0}' operator is not allowed for boolean types. Consider using '{1}' instead." },
-        Block_scoped_variable_0_used_before_its_declaration: { code: 2448, category: ts.DiagnosticCategory.Error, key: "Block_scoped_variable_0_used_before_its_declaration_2448", message: "Block-scoped variable '{0}' used before its declaration." },
-        The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property: { code: 2449, category: ts.DiagnosticCategory.Error, key: "The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property_2449", message: "The operand of an increment or decrement operator cannot be a constant or a read-only property." },
-        Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property: { code: 2450, category: ts.DiagnosticCategory.Error, key: "Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property_2450", message: "Left-hand side of assignment expression cannot be a constant or a read-only property." },
-        Cannot_redeclare_block_scoped_variable_0: { code: 2451, category: ts.DiagnosticCategory.Error, key: "Cannot_redeclare_block_scoped_variable_0_2451", message: "Cannot redeclare block-scoped variable '{0}'." },
-        An_enum_member_cannot_have_a_numeric_name: { code: 2452, category: ts.DiagnosticCategory.Error, key: "An_enum_member_cannot_have_a_numeric_name_2452", message: "An enum member cannot have a numeric name." },
-        The_type_argument_for_type_parameter_0_cannot_be_inferred_from_the_usage_Consider_specifying_the_type_arguments_explicitly: { code: 2453, category: ts.DiagnosticCategory.Error, key: "The_type_argument_for_type_parameter_0_cannot_be_inferred_from_the_usage_Consider_specifying_the_typ_2453", message: "The type argument for type parameter '{0}' cannot be inferred from the usage. Consider specifying the type arguments explicitly." },
-        Variable_0_is_used_before_being_assigned: { code: 2454, category: ts.DiagnosticCategory.Error, key: "Variable_0_is_used_before_being_assigned_2454", message: "Variable '{0}' is used before being assigned." },
-        Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0: { code: 2455, category: ts.DiagnosticCategory.Error, key: "Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0_2455", message: "Type argument candidate '{1}' is not a valid type argument because it is not a supertype of candidate '{0}'." },
-        Type_alias_0_circularly_references_itself: { code: 2456, category: ts.DiagnosticCategory.Error, key: "Type_alias_0_circularly_references_itself_2456", message: "Type alias '{0}' circularly references itself." },
-        Type_alias_name_cannot_be_0: { code: 2457, category: ts.DiagnosticCategory.Error, key: "Type_alias_name_cannot_be_0_2457", message: "Type alias name cannot be '{0}'" },
-        An_AMD_module_cannot_have_multiple_name_assignments: { code: 2458, category: ts.DiagnosticCategory.Error, key: "An_AMD_module_cannot_have_multiple_name_assignments_2458", message: "An AMD module cannot have multiple name assignments." },
-        Type_0_has_no_property_1_and_no_string_index_signature: { code: 2459, category: ts.DiagnosticCategory.Error, key: "Type_0_has_no_property_1_and_no_string_index_signature_2459", message: "Type '{0}' has no property '{1}' and no string index signature." },
-        Type_0_has_no_property_1: { code: 2460, category: ts.DiagnosticCategory.Error, key: "Type_0_has_no_property_1_2460", message: "Type '{0}' has no property '{1}'." },
-        Type_0_is_not_an_array_type: { code: 2461, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_an_array_type_2461", message: "Type '{0}' is not an array type." },
-        A_rest_element_must_be_last_in_an_array_destructuring_pattern: { code: 2462, category: ts.DiagnosticCategory.Error, key: "A_rest_element_must_be_last_in_an_array_destructuring_pattern_2462", message: "A rest element must be last in an array destructuring pattern" },
-        A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature: { code: 2463, category: ts.DiagnosticCategory.Error, key: "A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature_2463", message: "A binding pattern parameter cannot be optional in an implementation signature." },
-        A_computed_property_name_must_be_of_type_string_number_symbol_or_any: { code: 2464, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_must_be_of_type_string_number_symbol_or_any_2464", message: "A computed property name must be of type 'string', 'number', 'symbol', or 'any'." },
-        this_cannot_be_referenced_in_a_computed_property_name: { code: 2465, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_a_computed_property_name_2465", message: "'this' cannot be referenced in a computed property name." },
-        super_cannot_be_referenced_in_a_computed_property_name: { code: 2466, category: ts.DiagnosticCategory.Error, key: "super_cannot_be_referenced_in_a_computed_property_name_2466", message: "'super' cannot be referenced in a computed property name." },
-        A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type: { code: 2467, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type_2467", message: "A computed property name cannot reference a type parameter from its containing type." },
-        Cannot_find_global_value_0: { code: 2468, category: ts.DiagnosticCategory.Error, key: "Cannot_find_global_value_0_2468", message: "Cannot find global value '{0}'." },
-        The_0_operator_cannot_be_applied_to_type_symbol: { code: 2469, category: ts.DiagnosticCategory.Error, key: "The_0_operator_cannot_be_applied_to_type_symbol_2469", message: "The '{0}' operator cannot be applied to type 'symbol'." },
-        Symbol_reference_does_not_refer_to_the_global_Symbol_constructor_object: { code: 2470, category: ts.DiagnosticCategory.Error, key: "Symbol_reference_does_not_refer_to_the_global_Symbol_constructor_object_2470", message: "'Symbol' reference does not refer to the global Symbol constructor object." },
-        A_computed_property_name_of_the_form_0_must_be_of_type_symbol: { code: 2471, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_of_the_form_0_must_be_of_type_symbol_2471", message: "A computed property name of the form '{0}' must be of type 'symbol'." },
-        Spread_operator_in_new_expressions_is_only_available_when_targeting_ECMAScript_5_and_higher: { code: 2472, category: ts.DiagnosticCategory.Error, key: "Spread_operator_in_new_expressions_is_only_available_when_targeting_ECMAScript_5_and_higher_2472", message: "Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher." },
-        Enum_declarations_must_all_be_const_or_non_const: { code: 2473, category: ts.DiagnosticCategory.Error, key: "Enum_declarations_must_all_be_const_or_non_const_2473", message: "Enum declarations must all be const or non-const." },
-        In_const_enum_declarations_member_initializer_must_be_constant_expression: { code: 2474, category: ts.DiagnosticCategory.Error, key: "In_const_enum_declarations_member_initializer_must_be_constant_expression_2474", message: "In 'const' enum declarations member initializer must be constant expression." },
-        const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_import_declaration_or_export_assignment: { code: 2475, category: ts.DiagnosticCategory.Error, key: "const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_im_2475", message: "'const' enums can only be used in property or index access expressions or the right hand side of an import declaration or export assignment." },
-        A_const_enum_member_can_only_be_accessed_using_a_string_literal: { code: 2476, category: ts.DiagnosticCategory.Error, key: "A_const_enum_member_can_only_be_accessed_using_a_string_literal_2476", message: "A const enum member can only be accessed using a string literal." },
-        const_enum_member_initializer_was_evaluated_to_a_non_finite_value: { code: 2477, category: ts.DiagnosticCategory.Error, key: "const_enum_member_initializer_was_evaluated_to_a_non_finite_value_2477", message: "'const' enum member initializer was evaluated to a non-finite value." },
-        const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN: { code: 2478, category: ts.DiagnosticCategory.Error, key: "const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN_2478", message: "'const' enum member initializer was evaluated to disallowed value 'NaN'." },
-        Property_0_does_not_exist_on_const_enum_1: { code: 2479, category: ts.DiagnosticCategory.Error, key: "Property_0_does_not_exist_on_const_enum_1_2479", message: "Property '{0}' does not exist on 'const' enum '{1}'." },
-        let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations: { code: 2480, category: ts.DiagnosticCategory.Error, key: "let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations_2480", message: "'let' is not allowed to be used as a name in 'let' or 'const' declarations." },
-        Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1: { code: 2481, category: ts.DiagnosticCategory.Error, key: "Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1_2481", message: "Cannot initialize outer scoped variable '{0}' in the same scope as block scoped declaration '{1}'." },
-        The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation: { code: 2483, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation_2483", message: "The left-hand side of a 'for...of' statement cannot use a type annotation." },
-        Export_declaration_conflicts_with_exported_declaration_of_0: { code: 2484, category: ts.DiagnosticCategory.Error, key: "Export_declaration_conflicts_with_exported_declaration_of_0_2484", message: "Export declaration conflicts with exported declaration of '{0}'" },
-        The_left_hand_side_of_a_for_of_statement_cannot_be_a_constant_or_a_read_only_property: { code: 2485, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_of_statement_cannot_be_a_constant_or_a_read_only_property_2485", message: "The left-hand side of a 'for...of' statement cannot be a constant or a read-only property." },
-        The_left_hand_side_of_a_for_in_statement_cannot_be_a_constant_or_a_read_only_property: { code: 2486, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_cannot_be_a_constant_or_a_read_only_property_2486", message: "The left-hand side of a 'for...in' statement cannot be a constant or a read-only property." },
-        Invalid_left_hand_side_in_for_of_statement: { code: 2487, category: ts.DiagnosticCategory.Error, key: "Invalid_left_hand_side_in_for_of_statement_2487", message: "Invalid left-hand side in 'for...of' statement." },
-        Type_must_have_a_Symbol_iterator_method_that_returns_an_iterator: { code: 2488, category: ts.DiagnosticCategory.Error, key: "Type_must_have_a_Symbol_iterator_method_that_returns_an_iterator_2488", message: "Type must have a '[Symbol.iterator]()' method that returns an iterator." },
-        An_iterator_must_have_a_next_method: { code: 2489, category: ts.DiagnosticCategory.Error, key: "An_iterator_must_have_a_next_method_2489", message: "An iterator must have a 'next()' method." },
-        The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property: { code: 2490, category: ts.DiagnosticCategory.Error, key: "The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property_2490", message: "The type returned by the 'next()' method of an iterator must have a 'value' property." },
-        The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern: { code: 2491, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern_2491", message: "The left-hand side of a 'for...in' statement cannot be a destructuring pattern." },
-        Cannot_redeclare_identifier_0_in_catch_clause: { code: 2492, category: ts.DiagnosticCategory.Error, key: "Cannot_redeclare_identifier_0_in_catch_clause_2492", message: "Cannot redeclare identifier '{0}' in catch clause" },
-        Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2: { code: 2493, category: ts.DiagnosticCategory.Error, key: "Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2_2493", message: "Tuple type '{0}' with length '{1}' cannot be assigned to tuple with length '{2}'." },
-        Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher: { code: 2494, category: ts.DiagnosticCategory.Error, key: "Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher_2494", message: "Using a string in a 'for...of' statement is only supported in ECMAScript 5 and higher." },
-        Type_0_is_not_an_array_type_or_a_string_type: { code: 2495, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_an_array_type_or_a_string_type_2495", message: "Type '{0}' is not an array type or a string type." },
-        The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_standard_function_expression: { code: 2496, category: ts.DiagnosticCategory.Error, key: "The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_stand_2496", message: "The 'arguments' object cannot be referenced in an arrow function in ES3 and ES5. Consider using a standard function expression." },
-        Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct: { code: 2497, category: ts.DiagnosticCategory.Error, key: "Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct_2497", message: "Module '{0}' resolves to a non-module entity and cannot be imported using this construct." },
-        Module_0_uses_export_and_cannot_be_used_with_export_Asterisk: { code: 2498, category: ts.DiagnosticCategory.Error, key: "Module_0_uses_export_and_cannot_be_used_with_export_Asterisk_2498", message: "Module '{0}' uses 'export =' and cannot be used with 'export *'." },
-        An_interface_can_only_extend_an_identifier_Slashqualified_name_with_optional_type_arguments: { code: 2499, category: ts.DiagnosticCategory.Error, key: "An_interface_can_only_extend_an_identifier_Slashqualified_name_with_optional_type_arguments_2499", message: "An interface can only extend an identifier/qualified-name with optional type arguments." },
-        A_class_can_only_implement_an_identifier_Slashqualified_name_with_optional_type_arguments: { code: 2500, category: ts.DiagnosticCategory.Error, key: "A_class_can_only_implement_an_identifier_Slashqualified_name_with_optional_type_arguments_2500", message: "A class can only implement an identifier/qualified-name with optional type arguments." },
-        A_rest_element_cannot_contain_a_binding_pattern: { code: 2501, category: ts.DiagnosticCategory.Error, key: "A_rest_element_cannot_contain_a_binding_pattern_2501", message: "A rest element cannot contain a binding pattern." },
-        _0_is_referenced_directly_or_indirectly_in_its_own_type_annotation: { code: 2502, category: ts.DiagnosticCategory.Error, key: "_0_is_referenced_directly_or_indirectly_in_its_own_type_annotation_2502", message: "'{0}' is referenced directly or indirectly in its own type annotation." },
-        Cannot_find_namespace_0: { code: 2503, category: ts.DiagnosticCategory.Error, key: "Cannot_find_namespace_0_2503", message: "Cannot find namespace '{0}'." },
-        A_generator_cannot_have_a_void_type_annotation: { code: 2505, category: ts.DiagnosticCategory.Error, key: "A_generator_cannot_have_a_void_type_annotation_2505", message: "A generator cannot have a 'void' type annotation." },
-        _0_is_referenced_directly_or_indirectly_in_its_own_base_expression: { code: 2506, category: ts.DiagnosticCategory.Error, key: "_0_is_referenced_directly_or_indirectly_in_its_own_base_expression_2506", message: "'{0}' is referenced directly or indirectly in its own base expression." },
-        Type_0_is_not_a_constructor_function_type: { code: 2507, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_a_constructor_function_type_2507", message: "Type '{0}' is not a constructor function type." },
-        No_base_constructor_has_the_specified_number_of_type_arguments: { code: 2508, category: ts.DiagnosticCategory.Error, key: "No_base_constructor_has_the_specified_number_of_type_arguments_2508", message: "No base constructor has the specified number of type arguments." },
-        Base_constructor_return_type_0_is_not_a_class_or_interface_type: { code: 2509, category: ts.DiagnosticCategory.Error, key: "Base_constructor_return_type_0_is_not_a_class_or_interface_type_2509", message: "Base constructor return type '{0}' is not a class or interface type." },
-        Base_constructors_must_all_have_the_same_return_type: { code: 2510, category: ts.DiagnosticCategory.Error, key: "Base_constructors_must_all_have_the_same_return_type_2510", message: "Base constructors must all have the same return type." },
-        Cannot_create_an_instance_of_the_abstract_class_0: { code: 2511, category: ts.DiagnosticCategory.Error, key: "Cannot_create_an_instance_of_the_abstract_class_0_2511", message: "Cannot create an instance of the abstract class '{0}'." },
-        Overload_signatures_must_all_be_abstract_or_non_abstract: { code: 2512, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_abstract_or_non_abstract_2512", message: "Overload signatures must all be abstract or non-abstract." },
-        Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression: { code: 2513, category: ts.DiagnosticCategory.Error, key: "Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression_2513", message: "Abstract method '{0}' in class '{1}' cannot be accessed via super expression." },
-        Classes_containing_abstract_methods_must_be_marked_abstract: { code: 2514, category: ts.DiagnosticCategory.Error, key: "Classes_containing_abstract_methods_must_be_marked_abstract_2514", message: "Classes containing abstract methods must be marked abstract." },
-        Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2: { code: 2515, category: ts.DiagnosticCategory.Error, key: "Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2_2515", message: "Non-abstract class '{0}' does not implement inherited abstract member '{1}' from class '{2}'." },
-        All_declarations_of_an_abstract_method_must_be_consecutive: { code: 2516, category: ts.DiagnosticCategory.Error, key: "All_declarations_of_an_abstract_method_must_be_consecutive_2516", message: "All declarations of an abstract method must be consecutive." },
-        Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type: { code: 2517, category: ts.DiagnosticCategory.Error, key: "Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type_2517", message: "Cannot assign an abstract constructor type to a non-abstract constructor type." },
-        A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard: { code: 2518, category: ts.DiagnosticCategory.Error, key: "A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard_2518", message: "A 'this'-based type guard is not compatible with a parameter-based type guard." },
-        Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions: { code: 2520, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions_2520", message: "Duplicate identifier '{0}'. Compiler uses declaration '{1}' to support async functions." },
-        Expression_resolves_to_variable_declaration_0_that_compiler_uses_to_support_async_functions: { code: 2521, category: ts.DiagnosticCategory.Error, key: "Expression_resolves_to_variable_declaration_0_that_compiler_uses_to_support_async_functions_2521", message: "Expression resolves to variable declaration '{0}' that compiler uses to support async functions." },
-        The_arguments_object_cannot_be_referenced_in_an_async_function_or_method_in_ES3_and_ES5_Consider_using_a_standard_function_or_method: { code: 2522, category: ts.DiagnosticCategory.Error, key: "The_arguments_object_cannot_be_referenced_in_an_async_function_or_method_in_ES3_and_ES5_Consider_usi_2522", message: "The 'arguments' object cannot be referenced in an async function or method in ES3 and ES5. Consider using a standard function or method." },
-        yield_expressions_cannot_be_used_in_a_parameter_initializer: { code: 2523, category: ts.DiagnosticCategory.Error, key: "yield_expressions_cannot_be_used_in_a_parameter_initializer_2523", message: "'yield' expressions cannot be used in a parameter initializer." },
-        await_expressions_cannot_be_used_in_a_parameter_initializer: { code: 2524, category: ts.DiagnosticCategory.Error, key: "await_expressions_cannot_be_used_in_a_parameter_initializer_2524", message: "'await' expressions cannot be used in a parameter initializer." },
-        Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value: { code: 2525, category: ts.DiagnosticCategory.Error, key: "Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value_2525", message: "Initializer provides no value for this binding element and the binding element has no default value." },
-        A_this_type_is_available_only_in_a_non_static_member_of_a_class_or_interface: { code: 2526, category: ts.DiagnosticCategory.Error, key: "A_this_type_is_available_only_in_a_non_static_member_of_a_class_or_interface_2526", message: "A 'this' type is available only in a non-static member of a class or interface." },
-        The_inferred_type_of_0_references_an_inaccessible_this_type_A_type_annotation_is_necessary: { code: 2527, category: ts.DiagnosticCategory.Error, key: "The_inferred_type_of_0_references_an_inaccessible_this_type_A_type_annotation_is_necessary_2527", message: "The inferred type of '{0}' references an inaccessible 'this' type. A type annotation is necessary." },
-        A_module_cannot_have_multiple_default_exports: { code: 2528, category: ts.DiagnosticCategory.Error, key: "A_module_cannot_have_multiple_default_exports_2528", message: "A module cannot have multiple default exports." },
-        Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_containing_async_functions: { code: 2529, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_containing_async_func_2529", message: "Duplicate identifier '{0}'. Compiler reserves name '{1}' in top level scope of a module containing async functions." },
-        Property_0_is_incompatible_with_index_signature: { code: 2530, category: ts.DiagnosticCategory.Error, key: "Property_0_is_incompatible_with_index_signature_2530", message: "Property '{0}' is incompatible with index signature." },
-        Object_is_possibly_null: { code: 2531, category: ts.DiagnosticCategory.Error, key: "Object_is_possibly_null_2531", message: "Object is possibly 'null'." },
-        Object_is_possibly_undefined: { code: 2532, category: ts.DiagnosticCategory.Error, key: "Object_is_possibly_undefined_2532", message: "Object is possibly 'undefined'." },
-        Object_is_possibly_null_or_undefined: { code: 2533, category: ts.DiagnosticCategory.Error, key: "Object_is_possibly_null_or_undefined_2533", message: "Object is possibly 'null' or 'undefined'." },
-        A_function_returning_never_cannot_have_a_reachable_end_point: { code: 2534, category: ts.DiagnosticCategory.Error, key: "A_function_returning_never_cannot_have_a_reachable_end_point_2534", message: "A function returning 'never' cannot have a reachable end point." },
-        Enum_type_0_has_members_with_initializers_that_are_not_literals: { code: 2535, category: ts.DiagnosticCategory.Error, key: "Enum_type_0_has_members_with_initializers_that_are_not_literals_2535", message: "Enum type '{0}' has members with initializers that are not literals." },
-        JSX_element_attributes_type_0_may_not_be_a_union_type: { code: 2600, category: ts.DiagnosticCategory.Error, key: "JSX_element_attributes_type_0_may_not_be_a_union_type_2600", message: "JSX element attributes type '{0}' may not be a union type." },
-        The_return_type_of_a_JSX_element_constructor_must_return_an_object_type: { code: 2601, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_a_JSX_element_constructor_must_return_an_object_type_2601", message: "The return type of a JSX element constructor must return an object type." },
-        JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist: { code: 2602, category: ts.DiagnosticCategory.Error, key: "JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist_2602", message: "JSX element implicitly has type 'any' because the global type 'JSX.Element' does not exist." },
-        Property_0_in_type_1_is_not_assignable_to_type_2: { code: 2603, category: ts.DiagnosticCategory.Error, key: "Property_0_in_type_1_is_not_assignable_to_type_2_2603", message: "Property '{0}' in type '{1}' is not assignable to type '{2}'" },
-        JSX_element_type_0_does_not_have_any_construct_or_call_signatures: { code: 2604, category: ts.DiagnosticCategory.Error, key: "JSX_element_type_0_does_not_have_any_construct_or_call_signatures_2604", message: "JSX element type '{0}' does not have any construct or call signatures." },
-        JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements: { code: 2605, category: ts.DiagnosticCategory.Error, key: "JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements_2605", message: "JSX element type '{0}' is not a constructor function for JSX elements." },
-        Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property: { code: 2606, category: ts.DiagnosticCategory.Error, key: "Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property_2606", message: "Property '{0}' of JSX spread attribute is not assignable to target property." },
-        JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property: { code: 2607, category: ts.DiagnosticCategory.Error, key: "JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property_2607", message: "JSX element class does not support attributes because it does not have a '{0}' property" },
-        The_global_type_JSX_0_may_not_have_more_than_one_property: { code: 2608, category: ts.DiagnosticCategory.Error, key: "The_global_type_JSX_0_may_not_have_more_than_one_property_2608", message: "The global type 'JSX.{0}' may not have more than one property" },
-        Cannot_emit_namespaced_JSX_elements_in_React: { code: 2650, category: ts.DiagnosticCategory.Error, key: "Cannot_emit_namespaced_JSX_elements_in_React_2650", message: "Cannot emit namespaced JSX elements in React" },
-        A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums: { code: 2651, category: ts.DiagnosticCategory.Error, key: "A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_memb_2651", message: "A member initializer in a enum declaration cannot reference members declared after it, including members defined in other enums." },
-        Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead: { code: 2652, category: ts.DiagnosticCategory.Error, key: "Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_d_2652", message: "Merged declaration '{0}' cannot include a default export declaration. Consider adding a separate 'export default {0}' declaration instead." },
-        Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1: { code: 2653, category: ts.DiagnosticCategory.Error, key: "Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1_2653", message: "Non-abstract class expression does not implement inherited abstract member '{0}' from class '{1}'." },
-        Exported_external_package_typings_file_cannot_contain_tripleslash_references_Please_contact_the_package_author_to_update_the_package_definition: { code: 2654, category: ts.DiagnosticCategory.Error, key: "Exported_external_package_typings_file_cannot_contain_tripleslash_references_Please_contact_the_pack_2654", message: "Exported external package typings file cannot contain tripleslash references. Please contact the package author to update the package definition." },
-        Exported_external_package_typings_file_0_is_not_a_module_Please_contact_the_package_author_to_update_the_package_definition: { code: 2656, category: ts.DiagnosticCategory.Error, key: "Exported_external_package_typings_file_0_is_not_a_module_Please_contact_the_package_author_to_update_2656", message: "Exported external package typings file '{0}' is not a module. Please contact the package author to update the package definition." },
-        JSX_expressions_must_have_one_parent_element: { code: 2657, category: ts.DiagnosticCategory.Error, key: "JSX_expressions_must_have_one_parent_element_2657", message: "JSX expressions must have one parent element" },
-        Type_0_provides_no_match_for_the_signature_1: { code: 2658, category: ts.DiagnosticCategory.Error, key: "Type_0_provides_no_match_for_the_signature_1_2658", message: "Type '{0}' provides no match for the signature '{1}'" },
-        super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_higher: { code: 2659, category: ts.DiagnosticCategory.Error, key: "super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_highe_2659", message: "'super' is only allowed in members of object literal expressions when option 'target' is 'ES2015' or higher." },
-        super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions: { code: 2660, category: ts.DiagnosticCategory.Error, key: "super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions_2660", message: "'super' can only be referenced in members of derived classes or object literal expressions." },
-        Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module: { code: 2661, category: ts.DiagnosticCategory.Error, key: "Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module_2661", message: "Cannot export '{0}'. Only local declarations can be exported from a module." },
-        Cannot_find_name_0_Did_you_mean_the_static_member_1_0: { code: 2662, category: ts.DiagnosticCategory.Error, key: "Cannot_find_name_0_Did_you_mean_the_static_member_1_0_2662", message: "Cannot find name '{0}'. Did you mean the static member '{1}.{0}'?" },
-        Cannot_find_name_0_Did_you_mean_the_instance_member_this_0: { code: 2663, category: ts.DiagnosticCategory.Error, key: "Cannot_find_name_0_Did_you_mean_the_instance_member_this_0_2663", message: "Cannot find name '{0}'. Did you mean the instance member 'this.{0}'?" },
-        Invalid_module_name_in_augmentation_module_0_cannot_be_found: { code: 2664, category: ts.DiagnosticCategory.Error, key: "Invalid_module_name_in_augmentation_module_0_cannot_be_found_2664", message: "Invalid module name in augmentation, module '{0}' cannot be found." },
-        Exports_and_export_assignments_are_not_permitted_in_module_augmentations: { code: 2666, category: ts.DiagnosticCategory.Error, key: "Exports_and_export_assignments_are_not_permitted_in_module_augmentations_2666", message: "Exports and export assignments are not permitted in module augmentations." },
-        Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_module: { code: 2667, category: ts.DiagnosticCategory.Error, key: "Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_mod_2667", message: "Imports are not permitted in module augmentations. Consider moving them to the enclosing external module." },
-        export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always_visible: { code: 2668, category: ts.DiagnosticCategory.Error, key: "export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always__2668", message: "'export' modifier cannot be applied to ambient modules and module augmentations since they are always visible." },
-        Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations: { code: 2669, category: ts.DiagnosticCategory.Error, key: "Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_2669", message: "Augmentations for the global scope can only be directly nested in external modules or ambient module declarations." },
-        Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambient_context: { code: 2670, category: ts.DiagnosticCategory.Error, key: "Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambien_2670", message: "Augmentations for the global scope should have 'declare' modifier unless they appear in already ambient context." },
-        Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity: { code: 2671, category: ts.DiagnosticCategory.Error, key: "Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity_2671", message: "Cannot augment module '{0}' because it resolves to a non-module entity." },
-        Cannot_assign_a_0_constructor_type_to_a_1_constructor_type: { code: 2672, category: ts.DiagnosticCategory.Error, key: "Cannot_assign_a_0_constructor_type_to_a_1_constructor_type_2672", message: "Cannot assign a '{0}' constructor type to a '{1}' constructor type." },
-        Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration: { code: 2673, category: ts.DiagnosticCategory.Error, key: "Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration_2673", message: "Constructor of class '{0}' is private and only accessible within the class declaration." },
-        Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration: { code: 2674, category: ts.DiagnosticCategory.Error, key: "Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration_2674", message: "Constructor of class '{0}' is protected and only accessible within the class declaration." },
-        Cannot_extend_a_class_0_Class_constructor_is_marked_as_private: { code: 2675, category: ts.DiagnosticCategory.Error, key: "Cannot_extend_a_class_0_Class_constructor_is_marked_as_private_2675", message: "Cannot extend a class '{0}'. Class constructor is marked as private." },
-        Accessors_must_both_be_abstract_or_non_abstract: { code: 2676, category: ts.DiagnosticCategory.Error, key: "Accessors_must_both_be_abstract_or_non_abstract_2676", message: "Accessors must both be abstract or non-abstract." },
-        A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type: { code: 2677, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type_2677", message: "A type predicate's type must be assignable to its parameter's type." },
-        Type_0_is_not_comparable_to_type_1: { code: 2678, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_comparable_to_type_1_2678", message: "Type '{0}' is not comparable to type '{1}'." },
+    // Literals
+    function isNumericLiteral(node) {
+        return node.kind === 8 /* NumericLiteral */;
+    }
+    ts.isNumericLiteral = isNumericLiteral;
+    function isStringLiteral(node) {
+        return node.kind === 9 /* StringLiteral */;
+    }
+    ts.isStringLiteral = isStringLiteral;
+    function isJsxText(node) {
+        return node.kind === 10 /* JsxText */;
+    }
+    ts.isJsxText = isJsxText;
+    function isRegularExpressionLiteral(node) {
+        return node.kind === 12 /* RegularExpressionLiteral */;
+    }
+    ts.isRegularExpressionLiteral = isRegularExpressionLiteral;
+    function isNoSubstitutionTemplateLiteral(node) {
+        return node.kind === 13 /* NoSubstitutionTemplateLiteral */;
+    }
+    ts.isNoSubstitutionTemplateLiteral = isNoSubstitutionTemplateLiteral;
+    // Pseudo-literals
+    function isTemplateHead(node) {
+        return node.kind === 14 /* TemplateHead */;
+    }
+    ts.isTemplateHead = isTemplateHead;
+    function isTemplateMiddle(node) {
+        return node.kind === 15 /* TemplateMiddle */;
+    }
+    ts.isTemplateMiddle = isTemplateMiddle;
+    function isTemplateTail(node) {
+        return node.kind === 16 /* TemplateTail */;
+    }
+    ts.isTemplateTail = isTemplateTail;
+    function isIdentifier(node) {
+        return node.kind === 71 /* Identifier */;
+    }
+    ts.isIdentifier = isIdentifier;
+    // Names
+    function isQualifiedName(node) {
+        return node.kind === 143 /* QualifiedName */;
+    }
+    ts.isQualifiedName = isQualifiedName;
+    function isComputedPropertyName(node) {
+        return node.kind === 144 /* ComputedPropertyName */;
+    }
+    ts.isComputedPropertyName = isComputedPropertyName;
+    // Signature elements
+    function isTypeParameterDeclaration(node) {
+        return node.kind === 145 /* TypeParameter */;
+    }
+    ts.isTypeParameterDeclaration = isTypeParameterDeclaration;
+    function isParameter(node) {
+        return node.kind === 146 /* Parameter */;
+    }
+    ts.isParameter = isParameter;
+    function isDecorator(node) {
+        return node.kind === 147 /* Decorator */;
+    }
+    ts.isDecorator = isDecorator;
+    // TypeMember
+    function isPropertySignature(node) {
+        return node.kind === 148 /* PropertySignature */;
+    }
+    ts.isPropertySignature = isPropertySignature;
+    function isPropertyDeclaration(node) {
+        return node.kind === 149 /* PropertyDeclaration */;
+    }
+    ts.isPropertyDeclaration = isPropertyDeclaration;
+    function isMethodSignature(node) {
+        return node.kind === 150 /* MethodSignature */;
+    }
+    ts.isMethodSignature = isMethodSignature;
+    function isMethodDeclaration(node) {
+        return node.kind === 151 /* MethodDeclaration */;
+    }
+    ts.isMethodDeclaration = isMethodDeclaration;
+    function isConstructorDeclaration(node) {
+        return node.kind === 152 /* Constructor */;
+    }
+    ts.isConstructorDeclaration = isConstructorDeclaration;
+    function isGetAccessorDeclaration(node) {
+        return node.kind === 153 /* GetAccessor */;
+    }
+    ts.isGetAccessorDeclaration = isGetAccessorDeclaration;
+    function isSetAccessorDeclaration(node) {
+        return node.kind === 154 /* SetAccessor */;
+    }
+    ts.isSetAccessorDeclaration = isSetAccessorDeclaration;
+    function isCallSignatureDeclaration(node) {
+        return node.kind === 155 /* CallSignature */;
+    }
+    ts.isCallSignatureDeclaration = isCallSignatureDeclaration;
+    function isConstructSignatureDeclaration(node) {
+        return node.kind === 156 /* ConstructSignature */;
+    }
+    ts.isConstructSignatureDeclaration = isConstructSignatureDeclaration;
+    function isIndexSignatureDeclaration(node) {
+        return node.kind === 157 /* IndexSignature */;
+    }
+    ts.isIndexSignatureDeclaration = isIndexSignatureDeclaration;
+    // Type
+    function isTypePredicateNode(node) {
+        return node.kind === 158 /* TypePredicate */;
+    }
+    ts.isTypePredicateNode = isTypePredicateNode;
+    function isTypeReferenceNode(node) {
+        return node.kind === 159 /* TypeReference */;
+    }
+    ts.isTypeReferenceNode = isTypeReferenceNode;
+    function isFunctionTypeNode(node) {
+        return node.kind === 160 /* FunctionType */;
+    }
+    ts.isFunctionTypeNode = isFunctionTypeNode;
+    function isConstructorTypeNode(node) {
+        return node.kind === 161 /* ConstructorType */;
+    }
+    ts.isConstructorTypeNode = isConstructorTypeNode;
+    function isTypeQueryNode(node) {
+        return node.kind === 162 /* TypeQuery */;
+    }
+    ts.isTypeQueryNode = isTypeQueryNode;
+    function isTypeLiteralNode(node) {
+        return node.kind === 163 /* TypeLiteral */;
+    }
+    ts.isTypeLiteralNode = isTypeLiteralNode;
+    function isArrayTypeNode(node) {
+        return node.kind === 164 /* ArrayType */;
+    }
+    ts.isArrayTypeNode = isArrayTypeNode;
+    function isTupleTypeNode(node) {
+        return node.kind === 165 /* TupleType */;
+    }
+    ts.isTupleTypeNode = isTupleTypeNode;
+    function isUnionTypeNode(node) {
+        return node.kind === 166 /* UnionType */;
+    }
+    ts.isUnionTypeNode = isUnionTypeNode;
+    function isIntersectionTypeNode(node) {
+        return node.kind === 167 /* IntersectionType */;
+    }
+    ts.isIntersectionTypeNode = isIntersectionTypeNode;
+    function isParenthesizedTypeNode(node) {
+        return node.kind === 168 /* ParenthesizedType */;
+    }
+    ts.isParenthesizedTypeNode = isParenthesizedTypeNode;
+    function isThisTypeNode(node) {
+        return node.kind === 169 /* ThisType */;
+    }
+    ts.isThisTypeNode = isThisTypeNode;
+    function isTypeOperatorNode(node) {
+        return node.kind === 170 /* TypeOperator */;
+    }
+    ts.isTypeOperatorNode = isTypeOperatorNode;
+    function isIndexedAccessTypeNode(node) {
+        return node.kind === 171 /* IndexedAccessType */;
+    }
+    ts.isIndexedAccessTypeNode = isIndexedAccessTypeNode;
+    function isMappedTypeNode(node) {
+        return node.kind === 172 /* MappedType */;
+    }
+    ts.isMappedTypeNode = isMappedTypeNode;
+    function isLiteralTypeNode(node) {
+        return node.kind === 173 /* LiteralType */;
+    }
+    ts.isLiteralTypeNode = isLiteralTypeNode;
+    // Binding patterns
+    function isObjectBindingPattern(node) {
+        return node.kind === 174 /* ObjectBindingPattern */;
+    }
+    ts.isObjectBindingPattern = isObjectBindingPattern;
+    function isArrayBindingPattern(node) {
+        return node.kind === 175 /* ArrayBindingPattern */;
+    }
+    ts.isArrayBindingPattern = isArrayBindingPattern;
+    function isBindingElement(node) {
+        return node.kind === 176 /* BindingElement */;
+    }
+    ts.isBindingElement = isBindingElement;
+    // Expression
+    function isArrayLiteralExpression(node) {
+        return node.kind === 177 /* ArrayLiteralExpression */;
+    }
+    ts.isArrayLiteralExpression = isArrayLiteralExpression;
+    function isObjectLiteralExpression(node) {
+        return node.kind === 178 /* ObjectLiteralExpression */;
+    }
+    ts.isObjectLiteralExpression = isObjectLiteralExpression;
+    function isPropertyAccessExpression(node) {
+        return node.kind === 179 /* PropertyAccessExpression */;
+    }
+    ts.isPropertyAccessExpression = isPropertyAccessExpression;
+    function isElementAccessExpression(node) {
+        return node.kind === 180 /* ElementAccessExpression */;
+    }
+    ts.isElementAccessExpression = isElementAccessExpression;
+    function isCallExpression(node) {
+        return node.kind === 181 /* CallExpression */;
+    }
+    ts.isCallExpression = isCallExpression;
+    function isNewExpression(node) {
+        return node.kind === 182 /* NewExpression */;
+    }
+    ts.isNewExpression = isNewExpression;
+    function isTaggedTemplateExpression(node) {
+        return node.kind === 183 /* TaggedTemplateExpression */;
+    }
+    ts.isTaggedTemplateExpression = isTaggedTemplateExpression;
+    function isTypeAssertion(node) {
+        return node.kind === 184 /* TypeAssertionExpression */;
+    }
+    ts.isTypeAssertion = isTypeAssertion;
+    function isParenthesizedExpression(node) {
+        return node.kind === 185 /* ParenthesizedExpression */;
+    }
+    ts.isParenthesizedExpression = isParenthesizedExpression;
+    function skipPartiallyEmittedExpressions(node) {
+        while (node.kind === 297 /* PartiallyEmittedExpression */) {
+            node = node.expression;
+        }
+        return node;
+    }
+    ts.skipPartiallyEmittedExpressions = skipPartiallyEmittedExpressions;
+    function isFunctionExpression(node) {
+        return node.kind === 186 /* FunctionExpression */;
+    }
+    ts.isFunctionExpression = isFunctionExpression;
+    function isArrowFunction(node) {
+        return node.kind === 187 /* ArrowFunction */;
+    }
+    ts.isArrowFunction = isArrowFunction;
+    function isDeleteExpression(node) {
+        return node.kind === 188 /* DeleteExpression */;
+    }
+    ts.isDeleteExpression = isDeleteExpression;
+    function isTypeOfExpression(node) {
+        return node.kind === 191 /* AwaitExpression */;
+    }
+    ts.isTypeOfExpression = isTypeOfExpression;
+    function isVoidExpression(node) {
+        return node.kind === 190 /* VoidExpression */;
+    }
+    ts.isVoidExpression = isVoidExpression;
+    function isAwaitExpression(node) {
+        return node.kind === 191 /* AwaitExpression */;
+    }
+    ts.isAwaitExpression = isAwaitExpression;
+    function isPrefixUnaryExpression(node) {
+        return node.kind === 192 /* PrefixUnaryExpression */;
+    }
+    ts.isPrefixUnaryExpression = isPrefixUnaryExpression;
+    function isPostfixUnaryExpression(node) {
+        return node.kind === 193 /* PostfixUnaryExpression */;
+    }
+    ts.isPostfixUnaryExpression = isPostfixUnaryExpression;
+    function isBinaryExpression(node) {
+        return node.kind === 194 /* BinaryExpression */;
+    }
+    ts.isBinaryExpression = isBinaryExpression;
+    function isConditionalExpression(node) {
+        return node.kind === 195 /* ConditionalExpression */;
+    }
+    ts.isConditionalExpression = isConditionalExpression;
+    function isTemplateExpression(node) {
+        return node.kind === 196 /* TemplateExpression */;
+    }
+    ts.isTemplateExpression = isTemplateExpression;
+    function isYieldExpression(node) {
+        return node.kind === 197 /* YieldExpression */;
+    }
+    ts.isYieldExpression = isYieldExpression;
+    function isSpreadElement(node) {
+        return node.kind === 198 /* SpreadElement */;
+    }
+    ts.isSpreadElement = isSpreadElement;
+    function isClassExpression(node) {
+        return node.kind === 199 /* ClassExpression */;
+    }
+    ts.isClassExpression = isClassExpression;
+    function isOmittedExpression(node) {
+        return node.kind === 200 /* OmittedExpression */;
+    }
+    ts.isOmittedExpression = isOmittedExpression;
+    function isExpressionWithTypeArguments(node) {
+        return node.kind === 201 /* ExpressionWithTypeArguments */;
+    }
+    ts.isExpressionWithTypeArguments = isExpressionWithTypeArguments;
+    function isAsExpression(node) {
+        return node.kind === 202 /* AsExpression */;
+    }
+    ts.isAsExpression = isAsExpression;
+    function isNonNullExpression(node) {
+        return node.kind === 203 /* NonNullExpression */;
+    }
+    ts.isNonNullExpression = isNonNullExpression;
+    function isMetaProperty(node) {
+        return node.kind === 204 /* MetaProperty */;
+    }
+    ts.isMetaProperty = isMetaProperty;
+    // Misc
+    function isTemplateSpan(node) {
+        return node.kind === 205 /* TemplateSpan */;
+    }
+    ts.isTemplateSpan = isTemplateSpan;
+    function isSemicolonClassElement(node) {
+        return node.kind === 206 /* SemicolonClassElement */;
+    }
+    ts.isSemicolonClassElement = isSemicolonClassElement;
+    // Block
+    function isBlock(node) {
+        return node.kind === 207 /* Block */;
+    }
+    ts.isBlock = isBlock;
+    function isVariableStatement(node) {
+        return node.kind === 208 /* VariableStatement */;
+    }
+    ts.isVariableStatement = isVariableStatement;
+    function isEmptyStatement(node) {
+        return node.kind === 209 /* EmptyStatement */;
+    }
+    ts.isEmptyStatement = isEmptyStatement;
+    function isExpressionStatement(node) {
+        return node.kind === 210 /* ExpressionStatement */;
+    }
+    ts.isExpressionStatement = isExpressionStatement;
+    function isIfStatement(node) {
+        return node.kind === 211 /* IfStatement */;
+    }
+    ts.isIfStatement = isIfStatement;
+    function isDoStatement(node) {
+        return node.kind === 212 /* DoStatement */;
+    }
+    ts.isDoStatement = isDoStatement;
+    function isWhileStatement(node) {
+        return node.kind === 213 /* WhileStatement */;
+    }
+    ts.isWhileStatement = isWhileStatement;
+    function isForStatement(node) {
+        return node.kind === 214 /* ForStatement */;
+    }
+    ts.isForStatement = isForStatement;
+    function isForInStatement(node) {
+        return node.kind === 215 /* ForInStatement */;
+    }
+    ts.isForInStatement = isForInStatement;
+    function isForOfStatement(node) {
+        return node.kind === 216 /* ForOfStatement */;
+    }
+    ts.isForOfStatement = isForOfStatement;
+    function isContinueStatement(node) {
+        return node.kind === 217 /* ContinueStatement */;
+    }
+    ts.isContinueStatement = isContinueStatement;
+    function isBreakStatement(node) {
+        return node.kind === 218 /* BreakStatement */;
+    }
+    ts.isBreakStatement = isBreakStatement;
+    function isReturnStatement(node) {
+        return node.kind === 219 /* ReturnStatement */;
+    }
+    ts.isReturnStatement = isReturnStatement;
+    function isWithStatement(node) {
+        return node.kind === 220 /* WithStatement */;
+    }
+    ts.isWithStatement = isWithStatement;
+    function isSwitchStatement(node) {
+        return node.kind === 221 /* SwitchStatement */;
+    }
+    ts.isSwitchStatement = isSwitchStatement;
+    function isLabeledStatement(node) {
+        return node.kind === 222 /* LabeledStatement */;
+    }
+    ts.isLabeledStatement = isLabeledStatement;
+    function isThrowStatement(node) {
+        return node.kind === 223 /* ThrowStatement */;
+    }
+    ts.isThrowStatement = isThrowStatement;
+    function isTryStatement(node) {
+        return node.kind === 224 /* TryStatement */;
+    }
+    ts.isTryStatement = isTryStatement;
+    function isDebuggerStatement(node) {
+        return node.kind === 225 /* DebuggerStatement */;
+    }
+    ts.isDebuggerStatement = isDebuggerStatement;
+    function isVariableDeclaration(node) {
+        return node.kind === 226 /* VariableDeclaration */;
+    }
+    ts.isVariableDeclaration = isVariableDeclaration;
+    function isVariableDeclarationList(node) {
+        return node.kind === 227 /* VariableDeclarationList */;
+    }
+    ts.isVariableDeclarationList = isVariableDeclarationList;
+    function isFunctionDeclaration(node) {
+        return node.kind === 228 /* FunctionDeclaration */;
+    }
+    ts.isFunctionDeclaration = isFunctionDeclaration;
+    function isClassDeclaration(node) {
+        return node.kind === 229 /* ClassDeclaration */;
+    }
+    ts.isClassDeclaration = isClassDeclaration;
+    function isInterfaceDeclaration(node) {
+        return node.kind === 230 /* InterfaceDeclaration */;
+    }
+    ts.isInterfaceDeclaration = isInterfaceDeclaration;
+    function isTypeAliasDeclaration(node) {
+        return node.kind === 231 /* TypeAliasDeclaration */;
+    }
+    ts.isTypeAliasDeclaration = isTypeAliasDeclaration;
+    function isEnumDeclaration(node) {
+        return node.kind === 232 /* EnumDeclaration */;
+    }
+    ts.isEnumDeclaration = isEnumDeclaration;
+    function isModuleDeclaration(node) {
+        return node.kind === 233 /* ModuleDeclaration */;
+    }
+    ts.isModuleDeclaration = isModuleDeclaration;
+    function isModuleBlock(node) {
+        return node.kind === 234 /* ModuleBlock */;
+    }
+    ts.isModuleBlock = isModuleBlock;
+    function isCaseBlock(node) {
+        return node.kind === 235 /* CaseBlock */;
+    }
+    ts.isCaseBlock = isCaseBlock;
+    function isNamespaceExportDeclaration(node) {
+        return node.kind === 236 /* NamespaceExportDeclaration */;
+    }
+    ts.isNamespaceExportDeclaration = isNamespaceExportDeclaration;
+    function isImportEqualsDeclaration(node) {
+        return node.kind === 237 /* ImportEqualsDeclaration */;
+    }
+    ts.isImportEqualsDeclaration = isImportEqualsDeclaration;
+    function isImportDeclaration(node) {
+        return node.kind === 238 /* ImportDeclaration */;
+    }
+    ts.isImportDeclaration = isImportDeclaration;
+    function isImportClause(node) {
+        return node.kind === 239 /* ImportClause */;
+    }
+    ts.isImportClause = isImportClause;
+    function isNamespaceImport(node) {
+        return node.kind === 240 /* NamespaceImport */;
+    }
+    ts.isNamespaceImport = isNamespaceImport;
+    function isNamedImports(node) {
+        return node.kind === 241 /* NamedImports */;
+    }
+    ts.isNamedImports = isNamedImports;
+    function isImportSpecifier(node) {
+        return node.kind === 242 /* ImportSpecifier */;
+    }
+    ts.isImportSpecifier = isImportSpecifier;
+    function isExportAssignment(node) {
+        return node.kind === 243 /* ExportAssignment */;
+    }
+    ts.isExportAssignment = isExportAssignment;
+    function isExportDeclaration(node) {
+        return node.kind === 244 /* ExportDeclaration */;
+    }
+    ts.isExportDeclaration = isExportDeclaration;
+    function isNamedExports(node) {
+        return node.kind === 245 /* NamedExports */;
+    }
+    ts.isNamedExports = isNamedExports;
+    function isExportSpecifier(node) {
+        return node.kind === 246 /* ExportSpecifier */;
+    }
+    ts.isExportSpecifier = isExportSpecifier;
+    function isMissingDeclaration(node) {
+        return node.kind === 247 /* MissingDeclaration */;
+    }
+    ts.isMissingDeclaration = isMissingDeclaration;
+    // Module References
+    function isExternalModuleReference(node) {
+        return node.kind === 248 /* ExternalModuleReference */;
+    }
+    ts.isExternalModuleReference = isExternalModuleReference;
+    // JSX
+    function isJsxElement(node) {
+        return node.kind === 249 /* JsxElement */;
+    }
+    ts.isJsxElement = isJsxElement;
+    function isJsxSelfClosingElement(node) {
+        return node.kind === 250 /* JsxSelfClosingElement */;
+    }
+    ts.isJsxSelfClosingElement = isJsxSelfClosingElement;
+    function isJsxOpeningElement(node) {
+        return node.kind === 251 /* JsxOpeningElement */;
+    }
+    ts.isJsxOpeningElement = isJsxOpeningElement;
+    function isJsxClosingElement(node) {
+        return node.kind === 252 /* JsxClosingElement */;
+    }
+    ts.isJsxClosingElement = isJsxClosingElement;
+    function isJsxAttribute(node) {
+        return node.kind === 253 /* JsxAttribute */;
+    }
+    ts.isJsxAttribute = isJsxAttribute;
+    function isJsxAttributes(node) {
+        return node.kind === 254 /* JsxAttributes */;
+    }
+    ts.isJsxAttributes = isJsxAttributes;
+    function isJsxSpreadAttribute(node) {
+        return node.kind === 255 /* JsxSpreadAttribute */;
+    }
+    ts.isJsxSpreadAttribute = isJsxSpreadAttribute;
+    function isJsxExpression(node) {
+        return node.kind === 256 /* JsxExpression */;
+    }
+    ts.isJsxExpression = isJsxExpression;
+    // Clauses
+    function isCaseClause(node) {
+        return node.kind === 257 /* CaseClause */;
+    }
+    ts.isCaseClause = isCaseClause;
+    function isDefaultClause(node) {
+        return node.kind === 258 /* DefaultClause */;
+    }
+    ts.isDefaultClause = isDefaultClause;
+    function isHeritageClause(node) {
+        return node.kind === 259 /* HeritageClause */;
+    }
+    ts.isHeritageClause = isHeritageClause;
+    function isCatchClause(node) {
+        return node.kind === 260 /* CatchClause */;
+    }
+    ts.isCatchClause = isCatchClause;
+    // Property assignments
+    function isPropertyAssignment(node) {
+        return node.kind === 261 /* PropertyAssignment */;
+    }
+    ts.isPropertyAssignment = isPropertyAssignment;
+    function isShorthandPropertyAssignment(node) {
+        return node.kind === 262 /* ShorthandPropertyAssignment */;
+    }
+    ts.isShorthandPropertyAssignment = isShorthandPropertyAssignment;
+    function isSpreadAssignment(node) {
+        return node.kind === 263 /* SpreadAssignment */;
+    }
+    ts.isSpreadAssignment = isSpreadAssignment;
+    // Enum
+    function isEnumMember(node) {
+        return node.kind === 264 /* EnumMember */;
+    }
+    ts.isEnumMember = isEnumMember;
+    // Top-level nodes
+    function isSourceFile(node) {
+        return node.kind === 265 /* SourceFile */;
+    }
+    ts.isSourceFile = isSourceFile;
+    function isBundle(node) {
+        return node.kind === 266 /* Bundle */;
+    }
+    ts.isBundle = isBundle;
+    // JSDoc
+    function isJSDocTypeExpression(node) {
+        return node.kind === 267 /* JSDocTypeExpression */;
+    }
+    ts.isJSDocTypeExpression = isJSDocTypeExpression;
+    function isJSDocAllType(node) {
+        return node.kind === 268 /* JSDocAllType */;
+    }
+    ts.isJSDocAllType = isJSDocAllType;
+    function isJSDocUnknownType(node) {
+        return node.kind === 269 /* JSDocUnknownType */;
+    }
+    ts.isJSDocUnknownType = isJSDocUnknownType;
+    function isJSDocArrayType(node) {
+        return node.kind === 270 /* JSDocArrayType */;
+    }
+    ts.isJSDocArrayType = isJSDocArrayType;
+    function isJSDocUnionType(node) {
+        return node.kind === 271 /* JSDocUnionType */;
+    }
+    ts.isJSDocUnionType = isJSDocUnionType;
+    function isJSDocTupleType(node) {
+        return node.kind === 272 /* JSDocTupleType */;
+    }
+    ts.isJSDocTupleType = isJSDocTupleType;
+    function isJSDocNullableType(node) {
+        return node.kind === 273 /* JSDocNullableType */;
+    }
+    ts.isJSDocNullableType = isJSDocNullableType;
+    function isJSDocNonNullableType(node) {
+        return node.kind === 274 /* JSDocNonNullableType */;
+    }
+    ts.isJSDocNonNullableType = isJSDocNonNullableType;
+    function isJSDocRecordType(node) {
+        return node.kind === 275 /* JSDocRecordType */;
+    }
+    ts.isJSDocRecordType = isJSDocRecordType;
+    function isJSDocRecordMember(node) {
+        return node.kind === 276 /* JSDocRecordMember */;
+    }
+    ts.isJSDocRecordMember = isJSDocRecordMember;
+    function isJSDocTypeReference(node) {
+        return node.kind === 277 /* JSDocTypeReference */;
+    }
+    ts.isJSDocTypeReference = isJSDocTypeReference;
+    function isJSDocOptionalType(node) {
+        return node.kind === 278 /* JSDocOptionalType */;
+    }
+    ts.isJSDocOptionalType = isJSDocOptionalType;
+    function isJSDocFunctionType(node) {
+        return node.kind === 279 /* JSDocFunctionType */;
+    }
+    ts.isJSDocFunctionType = isJSDocFunctionType;
+    function isJSDocVariadicType(node) {
+        return node.kind === 280 /* JSDocVariadicType */;
+    }
+    ts.isJSDocVariadicType = isJSDocVariadicType;
+    function isJSDocConstructorType(node) {
+        return node.kind === 281 /* JSDocConstructorType */;
+    }
+    ts.isJSDocConstructorType = isJSDocConstructorType;
+    function isJSDocThisType(node) {
+        return node.kind === 282 /* JSDocThisType */;
+    }
+    ts.isJSDocThisType = isJSDocThisType;
+    function isJSDoc(node) {
+        return node.kind === 283 /* JSDocComment */;
+    }
+    ts.isJSDoc = isJSDoc;
+    function isJSDocAugmentsTag(node) {
+        return node.kind === 285 /* JSDocAugmentsTag */;
+    }
+    ts.isJSDocAugmentsTag = isJSDocAugmentsTag;
+    function isJSDocParameterTag(node) {
+        return node.kind === 287 /* JSDocParameterTag */;
+    }
+    ts.isJSDocParameterTag = isJSDocParameterTag;
+    function isJSDocReturnTag(node) {
+        return node.kind === 288 /* JSDocReturnTag */;
+    }
+    ts.isJSDocReturnTag = isJSDocReturnTag;
+    function isJSDocTypeTag(node) {
+        return node.kind === 289 /* JSDocTypeTag */;
+    }
+    ts.isJSDocTypeTag = isJSDocTypeTag;
+    function isJSDocTemplateTag(node) {
+        return node.kind === 290 /* JSDocTemplateTag */;
+    }
+    ts.isJSDocTemplateTag = isJSDocTemplateTag;
+    function isJSDocTypedefTag(node) {
+        return node.kind === 291 /* JSDocTypedefTag */;
+    }
+    ts.isJSDocTypedefTag = isJSDocTypedefTag;
+    function isJSDocPropertyTag(node) {
+        return node.kind === 292 /* JSDocPropertyTag */;
+    }
+    ts.isJSDocPropertyTag = isJSDocPropertyTag;
+    function isJSDocTypeLiteral(node) {
+        return node.kind === 293 /* JSDocTypeLiteral */;
+    }
+    ts.isJSDocTypeLiteral = isJSDocTypeLiteral;
+    function isJSDocLiteralType(node) {
+        return node.kind === 294 /* JSDocLiteralType */;
+    }
+    ts.isJSDocLiteralType = isJSDocLiteralType;
+})(ts || (ts = {}));
+// Node tests
+//
+// All node tests in the following list should *not* reference parent pointers so that
+// they may be used with transformations.
+(function (ts) {
+    /* @internal */
+    function isNode(node) {
+        return isNodeKind(node.kind);
+    }
+    ts.isNode = isNode;
+    /* @internal */
+    function isNodeKind(kind) {
+        return kind >= 143 /* FirstNode */;
+    }
+    ts.isNodeKind = isNodeKind;
+    /**
+     * True if node is of some token syntax kind.
+     * For example, this is true for an IfKeyword but not for an IfStatement.
+     */
+    function isToken(n) {
+        return n.kind >= 0 /* FirstToken */ && n.kind <= 142 /* LastToken */;
+    }
+    ts.isToken = isToken;
+    // Node Arrays
+    /* @internal */
+    function isNodeArray(array) {
+        return array.hasOwnProperty("pos")
+            && array.hasOwnProperty("end");
+    }
+    ts.isNodeArray = isNodeArray;
+    // Literals
+    /* @internal */
+    function isLiteralKind(kind) {
+        return 8 /* FirstLiteralToken */ <= kind && kind <= 13 /* LastLiteralToken */;
+    }
+    ts.isLiteralKind = isLiteralKind;
+    function isLiteralExpression(node) {
+        return isLiteralKind(node.kind);
+    }
+    ts.isLiteralExpression = isLiteralExpression;
+    // Pseudo-literals
+    /* @internal */
+    function isTemplateLiteralKind(kind) {
+        return 13 /* FirstTemplateToken */ <= kind && kind <= 16 /* LastTemplateToken */;
+    }
+    ts.isTemplateLiteralKind = isTemplateLiteralKind;
+    function isTemplateMiddleOrTemplateTail(node) {
+        var kind = node.kind;
+        return kind === 15 /* TemplateMiddle */
+            || kind === 16 /* TemplateTail */;
+    }
+    ts.isTemplateMiddleOrTemplateTail = isTemplateMiddleOrTemplateTail;
+    // Identifiers
+    /* @internal */
+    function isGeneratedIdentifier(node) {
+        // Using `>` here catches both `GeneratedIdentifierKind.None` and `undefined`.
+        return ts.isIdentifier(node) && node.autoGenerateKind > 0 /* None */;
+    }
+    ts.isGeneratedIdentifier = isGeneratedIdentifier;
+    // Keywords
+    /* @internal */
+    function isModifierKind(token) {
+        switch (token) {
+            case 117 /* AbstractKeyword */:
+            case 120 /* AsyncKeyword */:
+            case 76 /* ConstKeyword */:
+            case 124 /* DeclareKeyword */:
+            case 79 /* DefaultKeyword */:
+            case 84 /* ExportKeyword */:
+            case 114 /* PublicKeyword */:
+            case 112 /* PrivateKeyword */:
+            case 113 /* ProtectedKeyword */:
+            case 131 /* ReadonlyKeyword */:
+            case 115 /* StaticKeyword */:
+                return true;
+        }
+        return false;
+    }
+    ts.isModifierKind = isModifierKind;
+    function isModifier(node) {
+        return isModifierKind(node.kind);
+    }
+    ts.isModifier = isModifier;
+    function isEntityName(node) {
+        var kind = node.kind;
+        return kind === 143 /* QualifiedName */
+            || kind === 71 /* Identifier */;
+    }
+    ts.isEntityName = isEntityName;
+    function isPropertyName(node) {
+        var kind = node.kind;
+        return kind === 71 /* Identifier */
+            || kind === 9 /* StringLiteral */
+            || kind === 8 /* NumericLiteral */
+            || kind === 144 /* ComputedPropertyName */;
+    }
+    ts.isPropertyName = isPropertyName;
+    function isBindingName(node) {
+        var kind = node.kind;
+        return kind === 71 /* Identifier */
+            || kind === 174 /* ObjectBindingPattern */
+            || kind === 175 /* ArrayBindingPattern */;
+    }
+    ts.isBindingName = isBindingName;
+    // Functions
+    function isFunctionLike(node) {
+        return node && isFunctionLikeKind(node.kind);
+    }
+    ts.isFunctionLike = isFunctionLike;
+    /* @internal */
+    function isFunctionLikeKind(kind) {
+        switch (kind) {
+            case 152 /* Constructor */:
+            case 186 /* FunctionExpression */:
+            case 228 /* FunctionDeclaration */:
+            case 187 /* ArrowFunction */:
+            case 151 /* MethodDeclaration */:
+            case 150 /* MethodSignature */:
+            case 153 /* GetAccessor */:
+            case 154 /* SetAccessor */:
+            case 155 /* CallSignature */:
+            case 156 /* ConstructSignature */:
+            case 157 /* IndexSignature */:
+            case 160 /* FunctionType */:
+            case 161 /* ConstructorType */:
+                return true;
+        }
+        return false;
+    }
+    ts.isFunctionLikeKind = isFunctionLikeKind;
+    // Classes
+    function isClassElement(node) {
+        var kind = node.kind;
+        return kind === 152 /* Constructor */
+            || kind === 149 /* PropertyDeclaration */
+            || kind === 151 /* MethodDeclaration */
+            || kind === 153 /* GetAccessor */
+            || kind === 154 /* SetAccessor */
+            || kind === 157 /* IndexSignature */
+            || kind === 206 /* SemicolonClassElement */
+            || kind === 247 /* MissingDeclaration */;
+    }
+    ts.isClassElement = isClassElement;
+    function isClassLike(node) {
+        return node && (node.kind === 229 /* ClassDeclaration */ || node.kind === 199 /* ClassExpression */);
+    }
+    ts.isClassLike = isClassLike;
+    function isAccessor(node) {
+        return node && (node.kind === 153 /* GetAccessor */ || node.kind === 154 /* SetAccessor */);
+    }
+    ts.isAccessor = isAccessor;
+    // Type members
+    function isTypeElement(node) {
+        var kind = node.kind;
+        return kind === 156 /* ConstructSignature */
+            || kind === 155 /* CallSignature */
+            || kind === 148 /* PropertySignature */
+            || kind === 150 /* MethodSignature */
+            || kind === 157 /* IndexSignature */
+            || kind === 247 /* MissingDeclaration */;
+    }
+    ts.isTypeElement = isTypeElement;
+    function isObjectLiteralElementLike(node) {
+        var kind = node.kind;
+        return kind === 261 /* PropertyAssignment */
+            || kind === 262 /* ShorthandPropertyAssignment */
+            || kind === 263 /* SpreadAssignment */
+            || kind === 151 /* MethodDeclaration */
+            || kind === 153 /* GetAccessor */
+            || kind === 154 /* SetAccessor */
+            || kind === 247 /* MissingDeclaration */;
+    }
+    ts.isObjectLiteralElementLike = isObjectLiteralElementLike;
+    // Type
+    function isTypeNodeKind(kind) {
+        return (kind >= 158 /* FirstTypeNode */ && kind <= 173 /* LastTypeNode */)
+            || kind === 119 /* AnyKeyword */
+            || kind === 133 /* NumberKeyword */
+            || kind === 134 /* ObjectKeyword */
+            || kind === 122 /* BooleanKeyword */
+            || kind === 136 /* StringKeyword */
+            || kind === 137 /* SymbolKeyword */
+            || kind === 99 /* ThisKeyword */
+            || kind === 105 /* VoidKeyword */
+            || kind === 139 /* UndefinedKeyword */
+            || kind === 95 /* NullKeyword */
+            || kind === 130 /* NeverKeyword */
+            || kind === 201 /* ExpressionWithTypeArguments */;
+    }
+    /**
+     * Node test that determines whether a node is a valid type node.
+     * This differs from the `isPartOfTypeNode` function which determines whether a node is *part*
+     * of a TypeNode.
+     */
+    function isTypeNode(node) {
+        return isTypeNodeKind(node.kind);
+    }
+    ts.isTypeNode = isTypeNode;
+    function isFunctionOrConstructorTypeNode(node) {
+        switch (node.kind) {
+            case 160 /* FunctionType */:
+            case 161 /* ConstructorType */:
+                return true;
+        }
+        return false;
+    }
+    ts.isFunctionOrConstructorTypeNode = isFunctionOrConstructorTypeNode;
+    // Binding patterns
+    /* @internal */
+    function isBindingPattern(node) {
+        if (node) {
+            var kind = node.kind;
+            return kind === 175 /* ArrayBindingPattern */
+                || kind === 174 /* ObjectBindingPattern */;
+        }
+        return false;
+    }
+    ts.isBindingPattern = isBindingPattern;
+    /* @internal */
+    function isAssignmentPattern(node) {
+        var kind = node.kind;
+        return kind === 177 /* ArrayLiteralExpression */
+            || kind === 178 /* ObjectLiteralExpression */;
+    }
+    ts.isAssignmentPattern = isAssignmentPattern;
+    /* @internal */
+    function isArrayBindingElement(node) {
+        var kind = node.kind;
+        return kind === 176 /* BindingElement */
+            || kind === 200 /* OmittedExpression */;
+    }
+    ts.isArrayBindingElement = isArrayBindingElement;
+    /**
+     * Determines whether the BindingOrAssignmentElement is a BindingElement-like declaration
+     */
+    /* @internal */
+    function isDeclarationBindingElement(bindingElement) {
+        switch (bindingElement.kind) {
+            case 226 /* VariableDeclaration */:
+            case 146 /* Parameter */:
+            case 176 /* BindingElement */:
+                return true;
+        }
+        return false;
+    }
+    ts.isDeclarationBindingElement = isDeclarationBindingElement;
+    /**
+     * Determines whether a node is a BindingOrAssignmentPattern
+     */
+    /* @internal */
+    function isBindingOrAssignmentPattern(node) {
+        return isObjectBindingOrAssignmentPattern(node)
+            || isArrayBindingOrAssignmentPattern(node);
+    }
+    ts.isBindingOrAssignmentPattern = isBindingOrAssignmentPattern;
+    /**
+     * Determines whether a node is an ObjectBindingOrAssignmentPattern
+     */
+    /* @internal */
+    function isObjectBindingOrAssignmentPattern(node) {
+        switch (node.kind) {
+            case 174 /* ObjectBindingPattern */:
+            case 178 /* ObjectLiteralExpression */:
+                return true;
+        }
+        return false;
+    }
+    ts.isObjectBindingOrAssignmentPattern = isObjectBindingOrAssignmentPattern;
+    /**
+     * Determines whether a node is an ArrayBindingOrAssignmentPattern
+     */
+    /* @internal */
+    function isArrayBindingOrAssignmentPattern(node) {
+        switch (node.kind) {
+            case 175 /* ArrayBindingPattern */:
+            case 177 /* ArrayLiteralExpression */:
+                return true;
+        }
+        return false;
+    }
+    ts.isArrayBindingOrAssignmentPattern = isArrayBindingOrAssignmentPattern;
+    // Expression
+    function isPropertyAccessOrQualifiedName(node) {
+        var kind = node.kind;
+        return kind === 179 /* PropertyAccessExpression */
+            || kind === 143 /* QualifiedName */;
+    }
+    ts.isPropertyAccessOrQualifiedName = isPropertyAccessOrQualifiedName;
+    function isCallLikeExpression(node) {
+        switch (node.kind) {
+            case 251 /* JsxOpeningElement */:
+            case 250 /* JsxSelfClosingElement */:
+            case 181 /* CallExpression */:
+            case 182 /* NewExpression */:
+            case 183 /* TaggedTemplateExpression */:
+            case 147 /* Decorator */:
+                return true;
+            default:
+                return false;
+        }
+    }
+    ts.isCallLikeExpression = isCallLikeExpression;
+    function isCallOrNewExpression(node) {
+        return node.kind === 181 /* CallExpression */ || node.kind === 182 /* NewExpression */;
+    }
+    ts.isCallOrNewExpression = isCallOrNewExpression;
+    function isTemplateLiteral(node) {
+        var kind = node.kind;
+        return kind === 196 /* TemplateExpression */
+            || kind === 13 /* NoSubstitutionTemplateLiteral */;
+    }
+    ts.isTemplateLiteral = isTemplateLiteral;
+    function isLeftHandSideExpressionKind(kind) {
+        return kind === 179 /* PropertyAccessExpression */
+            || kind === 180 /* ElementAccessExpression */
+            || kind === 182 /* NewExpression */
+            || kind === 181 /* CallExpression */
+            || kind === 249 /* JsxElement */
+            || kind === 250 /* JsxSelfClosingElement */
+            || kind === 183 /* TaggedTemplateExpression */
+            || kind === 177 /* ArrayLiteralExpression */
+            || kind === 185 /* ParenthesizedExpression */
+            || kind === 178 /* ObjectLiteralExpression */
+            || kind === 199 /* ClassExpression */
+            || kind === 186 /* FunctionExpression */
+            || kind === 71 /* Identifier */
+            || kind === 12 /* RegularExpressionLiteral */
+            || kind === 8 /* NumericLiteral */
+            || kind === 9 /* StringLiteral */
+            || kind === 13 /* NoSubstitutionTemplateLiteral */
+            || kind === 196 /* TemplateExpression */
+            || kind === 86 /* FalseKeyword */
+            || kind === 95 /* NullKeyword */
+            || kind === 99 /* ThisKeyword */
+            || kind === 101 /* TrueKeyword */
+            || kind === 97 /* SuperKeyword */
+            || kind === 203 /* NonNullExpression */
+            || kind === 204 /* MetaProperty */;
+    }
+    /* @internal */
+    function isLeftHandSideExpression(node) {
+        return isLeftHandSideExpressionKind(ts.skipPartiallyEmittedExpressions(node).kind);
+    }
+    ts.isLeftHandSideExpression = isLeftHandSideExpression;
+    function isUnaryExpressionKind(kind) {
+        return kind === 192 /* PrefixUnaryExpression */
+            || kind === 193 /* PostfixUnaryExpression */
+            || kind === 188 /* DeleteExpression */
+            || kind === 189 /* TypeOfExpression */
+            || kind === 190 /* VoidExpression */
+            || kind === 191 /* AwaitExpression */
+            || kind === 184 /* TypeAssertionExpression */
+            || isLeftHandSideExpressionKind(kind);
+    }
+    /* @internal */
+    function isUnaryExpression(node) {
+        return isUnaryExpressionKind(ts.skipPartiallyEmittedExpressions(node).kind);
+    }
+    ts.isUnaryExpression = isUnaryExpression;
+    function isExpressionKind(kind) {
+        return kind === 195 /* ConditionalExpression */
+            || kind === 197 /* YieldExpression */
+            || kind === 187 /* ArrowFunction */
+            || kind === 194 /* BinaryExpression */
+            || kind === 198 /* SpreadElement */
+            || kind === 202 /* AsExpression */
+            || kind === 200 /* OmittedExpression */
+            || kind === 298 /* CommaListExpression */
+            || isUnaryExpressionKind(kind);
+    }
+    /* @internal */
+    function isExpression(node) {
+        return isExpressionKind(ts.skipPartiallyEmittedExpressions(node).kind);
+    }
+    ts.isExpression = isExpression;
+    function isAssertionExpression(node) {
+        var kind = node.kind;
+        return kind === 184 /* TypeAssertionExpression */
+            || kind === 202 /* AsExpression */;
+    }
+    ts.isAssertionExpression = isAssertionExpression;
+    /* @internal */
+    function isPartiallyEmittedExpression(node) {
+        return node.kind === 297 /* PartiallyEmittedExpression */;
+    }
+    ts.isPartiallyEmittedExpression = isPartiallyEmittedExpression;
+    /* @internal */
+    function isNotEmittedStatement(node) {
+        return node.kind === 296 /* NotEmittedStatement */;
+    }
+    ts.isNotEmittedStatement = isNotEmittedStatement;
+    /* @internal */
+    function isNotEmittedOrPartiallyEmittedNode(node) {
+        return isNotEmittedStatement(node)
+            || isPartiallyEmittedExpression(node);
+    }
+    ts.isNotEmittedOrPartiallyEmittedNode = isNotEmittedOrPartiallyEmittedNode;
+    // Statement
+    function isIterationStatement(node, lookInLabeledStatements) {
+        switch (node.kind) {
+            case 214 /* ForStatement */:
+            case 215 /* ForInStatement */:
+            case 216 /* ForOfStatement */:
+            case 212 /* DoStatement */:
+            case 213 /* WhileStatement */:
+                return true;
+            case 222 /* LabeledStatement */:
+                return lookInLabeledStatements && isIterationStatement(node.statement, lookInLabeledStatements);
+        }
+        return false;
+    }
+    ts.isIterationStatement = isIterationStatement;
+    /* @internal */
+    function isForInOrOfStatement(node) {
+        return node.kind === 215 /* ForInStatement */ || node.kind === 216 /* ForOfStatement */;
+    }
+    ts.isForInOrOfStatement = isForInOrOfStatement;
+    // Element
+    /* @internal */
+    function isConciseBody(node) {
+        return ts.isBlock(node)
+            || isExpression(node);
+    }
+    ts.isConciseBody = isConciseBody;
+    /* @internal */
+    function isFunctionBody(node) {
+        return ts.isBlock(node);
+    }
+    ts.isFunctionBody = isFunctionBody;
+    /* @internal */
+    function isForInitializer(node) {
+        return ts.isVariableDeclarationList(node)
+            || isExpression(node);
+    }
+    ts.isForInitializer = isForInitializer;
+    /* @internal */
+    function isModuleBody(node) {
+        var kind = node.kind;
+        return kind === 234 /* ModuleBlock */
+            || kind === 233 /* ModuleDeclaration */
+            || kind === 71 /* Identifier */;
+    }
+    ts.isModuleBody = isModuleBody;
+    /* @internal */
+    function isNamespaceBody(node) {
+        var kind = node.kind;
+        return kind === 234 /* ModuleBlock */
+            || kind === 233 /* ModuleDeclaration */;
+    }
+    ts.isNamespaceBody = isNamespaceBody;
+    /* @internal */
+    function isJSDocNamespaceBody(node) {
+        var kind = node.kind;
+        return kind === 71 /* Identifier */
+            || kind === 233 /* ModuleDeclaration */;
+    }
+    ts.isJSDocNamespaceBody = isJSDocNamespaceBody;
+    /* @internal */
+    function isNamedImportBindings(node) {
+        var kind = node.kind;
+        return kind === 241 /* NamedImports */
+            || kind === 240 /* NamespaceImport */;
+    }
+    ts.isNamedImportBindings = isNamedImportBindings;
+    /* @internal */
+    function isModuleOrEnumDeclaration(node) {
+        return node.kind === 233 /* ModuleDeclaration */ || node.kind === 232 /* EnumDeclaration */;
+    }
+    ts.isModuleOrEnumDeclaration = isModuleOrEnumDeclaration;
+    function isDeclarationKind(kind) {
+        return kind === 187 /* ArrowFunction */
+            || kind === 176 /* BindingElement */
+            || kind === 229 /* ClassDeclaration */
+            || kind === 199 /* ClassExpression */
+            || kind === 152 /* Constructor */
+            || kind === 232 /* EnumDeclaration */
+            || kind === 264 /* EnumMember */
+            || kind === 246 /* ExportSpecifier */
+            || kind === 228 /* FunctionDeclaration */
+            || kind === 186 /* FunctionExpression */
+            || kind === 153 /* GetAccessor */
+            || kind === 239 /* ImportClause */
+            || kind === 237 /* ImportEqualsDeclaration */
+            || kind === 242 /* ImportSpecifier */
+            || kind === 230 /* InterfaceDeclaration */
+            || kind === 253 /* JsxAttribute */
+            || kind === 151 /* MethodDeclaration */
+            || kind === 150 /* MethodSignature */
+            || kind === 233 /* ModuleDeclaration */
+            || kind === 236 /* NamespaceExportDeclaration */
+            || kind === 240 /* NamespaceImport */
+            || kind === 146 /* Parameter */
+            || kind === 261 /* PropertyAssignment */
+            || kind === 149 /* PropertyDeclaration */
+            || kind === 148 /* PropertySignature */
+            || kind === 154 /* SetAccessor */
+            || kind === 262 /* ShorthandPropertyAssignment */
+            || kind === 231 /* TypeAliasDeclaration */
+            || kind === 145 /* TypeParameter */
+            || kind === 226 /* VariableDeclaration */
+            || kind === 291 /* JSDocTypedefTag */;
+    }
+    function isDeclarationStatementKind(kind) {
+        return kind === 228 /* FunctionDeclaration */
+            || kind === 247 /* MissingDeclaration */
+            || kind === 229 /* ClassDeclaration */
+            || kind === 230 /* InterfaceDeclaration */
+            || kind === 231 /* TypeAliasDeclaration */
+            || kind === 232 /* EnumDeclaration */
+            || kind === 233 /* ModuleDeclaration */
+            || kind === 238 /* ImportDeclaration */
+            || kind === 237 /* ImportEqualsDeclaration */
+            || kind === 244 /* ExportDeclaration */
+            || kind === 243 /* ExportAssignment */
+            || kind === 236 /* NamespaceExportDeclaration */;
+    }
+    function isStatementKindButNotDeclarationKind(kind) {
+        return kind === 218 /* BreakStatement */
+            || kind === 217 /* ContinueStatement */
+            || kind === 225 /* DebuggerStatement */
+            || kind === 212 /* DoStatement */
+            || kind === 210 /* ExpressionStatement */
+            || kind === 209 /* EmptyStatement */
+            || kind === 215 /* ForInStatement */
+            || kind === 216 /* ForOfStatement */
+            || kind === 214 /* ForStatement */
+            || kind === 211 /* IfStatement */
+            || kind === 222 /* LabeledStatement */
+            || kind === 219 /* ReturnStatement */
+            || kind === 221 /* SwitchStatement */
+            || kind === 223 /* ThrowStatement */
+            || kind === 224 /* TryStatement */
+            || kind === 208 /* VariableStatement */
+            || kind === 213 /* WhileStatement */
+            || kind === 220 /* WithStatement */
+            || kind === 296 /* NotEmittedStatement */
+            || kind === 300 /* EndOfDeclarationMarker */
+            || kind === 299 /* MergeDeclarationMarker */;
+    }
+    /* @internal */
+    function isDeclaration(node) {
+        if (node.kind === 145 /* TypeParameter */) {
+            return node.parent.kind !== 290 /* JSDocTemplateTag */ || ts.isInJavaScriptFile(node);
+        }
+        return isDeclarationKind(node.kind);
+    }
+    ts.isDeclaration = isDeclaration;
+    /* @internal */
+    function isDeclarationStatement(node) {
+        return isDeclarationStatementKind(node.kind);
+    }
+    ts.isDeclarationStatement = isDeclarationStatement;
+    /**
+     * Determines whether the node is a statement that is not also a declaration
+     */
+    /* @internal */
+    function isStatementButNotDeclaration(node) {
+        return isStatementKindButNotDeclarationKind(node.kind);
+    }
+    ts.isStatementButNotDeclaration = isStatementButNotDeclaration;
+    /* @internal */
+    function isStatement(node) {
+        var kind = node.kind;
+        return isStatementKindButNotDeclarationKind(kind)
+            || isDeclarationStatementKind(kind)
+            || kind === 207 /* Block */;
+    }
+    ts.isStatement = isStatement;
+    // Module references
+    /* @internal */
+    function isModuleReference(node) {
+        var kind = node.kind;
+        return kind === 248 /* ExternalModuleReference */
+            || kind === 143 /* QualifiedName */
+            || kind === 71 /* Identifier */;
+    }
+    ts.isModuleReference = isModuleReference;
+    // JSX
+    /* @internal */
+    function isJsxTagNameExpression(node) {
+        var kind = node.kind;
+        return kind === 99 /* ThisKeyword */
+            || kind === 71 /* Identifier */
+            || kind === 179 /* PropertyAccessExpression */;
+    }
+    ts.isJsxTagNameExpression = isJsxTagNameExpression;
+    /* @internal */
+    function isJsxChild(node) {
+        var kind = node.kind;
+        return kind === 249 /* JsxElement */
+            || kind === 256 /* JsxExpression */
+            || kind === 250 /* JsxSelfClosingElement */
+            || kind === 10 /* JsxText */;
+    }
+    ts.isJsxChild = isJsxChild;
+    /* @internal */
+    function isJsxAttributeLike(node) {
+        var kind = node.kind;
+        return kind === 253 /* JsxAttribute */
+            || kind === 255 /* JsxSpreadAttribute */;
+    }
+    ts.isJsxAttributeLike = isJsxAttributeLike;
+    /* @internal */
+    function isStringLiteralOrJsxExpression(node) {
+        var kind = node.kind;
+        return kind === 9 /* StringLiteral */
+            || kind === 256 /* JsxExpression */;
+    }
+    ts.isStringLiteralOrJsxExpression = isStringLiteralOrJsxExpression;
+    function isJsxOpeningLikeElement(node) {
+        var kind = node.kind;
+        return kind === 251 /* JsxOpeningElement */
+            || kind === 250 /* JsxSelfClosingElement */;
+    }
+    ts.isJsxOpeningLikeElement = isJsxOpeningLikeElement;
+    // Clauses
+    function isCaseOrDefaultClause(node) {
+        var kind = node.kind;
+        return kind === 257 /* CaseClause */
+            || kind === 258 /* DefaultClause */;
+    }
+    ts.isCaseOrDefaultClause = isCaseOrDefaultClause;
+    // JSDoc
+    /** True if node is of some JSDoc syntax kind. */
+    /* @internal */
+    function isJSDocNode(node) {
+        return node.kind >= 267 /* FirstJSDocNode */ && node.kind <= 294 /* LastJSDocNode */;
+    }
+    ts.isJSDocNode = isJSDocNode;
+    /** True if node is of a kind that may contain comment text. */
+    function isJSDocCommentContainingNode(node) {
+        return node.kind === 283 /* JSDocComment */ || isJSDocTag(node);
+    }
+    ts.isJSDocCommentContainingNode = isJSDocCommentContainingNode;
+    // TODO: determine what this does before making it public.
+    /* @internal */
+    function isJSDocTag(node) {
+        return node.kind >= 284 /* FirstJSDocTagNode */ && node.kind <= 294 /* LastJSDocTagNode */;
+    }
+    ts.isJSDocTag = isJSDocTag;
+})(ts || (ts = {}));
+// <auto-generated />
+/// <reference path="types.ts" />
+/* @internal */
+var ts;
+(function (ts) {
+    ts.Diagnostics = {
+        Unterminated_string_literal: { code: 1002, category: ts.DiagnosticCategory.Error, key: "Unterminated_string_literal_1002", message: "Unterminated string literal." },
+        Identifier_expected: { code: 1003, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_1003", message: "Identifier expected." },
+        _0_expected: { code: 1005, category: ts.DiagnosticCategory.Error, key: "_0_expected_1005", message: "'{0}' expected." },
+        A_file_cannot_have_a_reference_to_itself: { code: 1006, category: ts.DiagnosticCategory.Error, key: "A_file_cannot_have_a_reference_to_itself_1006", message: "A file cannot have a reference to itself." },
+        Trailing_comma_not_allowed: { code: 1009, category: ts.DiagnosticCategory.Error, key: "Trailing_comma_not_allowed_1009", message: "Trailing comma not allowed." },
+        Asterisk_Slash_expected: { code: 1010, category: ts.DiagnosticCategory.Error, key: "Asterisk_Slash_expected_1010", message: "'*/' expected." },
+        Unexpected_token: { code: 1012, category: ts.DiagnosticCategory.Error, key: "Unexpected_token_1012", message: "Unexpected token." },
+        A_rest_parameter_must_be_last_in_a_parameter_list: { code: 1014, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_must_be_last_in_a_parameter_list_1014", message: "A rest parameter must be last in a parameter list." },
+        Parameter_cannot_have_question_mark_and_initializer: { code: 1015, category: ts.DiagnosticCategory.Error, key: "Parameter_cannot_have_question_mark_and_initializer_1015", message: "Parameter cannot have question mark and initializer." },
+        A_required_parameter_cannot_follow_an_optional_parameter: { code: 1016, category: ts.DiagnosticCategory.Error, key: "A_required_parameter_cannot_follow_an_optional_parameter_1016", message: "A required parameter cannot follow an optional parameter." },
+        An_index_signature_cannot_have_a_rest_parameter: { code: 1017, category: ts.DiagnosticCategory.Error, key: "An_index_signature_cannot_have_a_rest_parameter_1017", message: "An index signature cannot have a rest parameter." },
+        An_index_signature_parameter_cannot_have_an_accessibility_modifier: { code: 1018, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_cannot_have_an_accessibility_modifier_1018", message: "An index signature parameter cannot have an accessibility modifier." },
+        An_index_signature_parameter_cannot_have_a_question_mark: { code: 1019, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_cannot_have_a_question_mark_1019", message: "An index signature parameter cannot have a question mark." },
+        An_index_signature_parameter_cannot_have_an_initializer: { code: 1020, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_cannot_have_an_initializer_1020", message: "An index signature parameter cannot have an initializer." },
+        An_index_signature_must_have_a_type_annotation: { code: 1021, category: ts.DiagnosticCategory.Error, key: "An_index_signature_must_have_a_type_annotation_1021", message: "An index signature must have a type annotation." },
+        An_index_signature_parameter_must_have_a_type_annotation: { code: 1022, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_must_have_a_type_annotation_1022", message: "An index signature parameter must have a type annotation." },
+        An_index_signature_parameter_type_must_be_string_or_number: { code: 1023, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_type_must_be_string_or_number_1023", message: "An index signature parameter type must be 'string' or 'number'." },
+        readonly_modifier_can_only_appear_on_a_property_declaration_or_index_signature: { code: 1024, category: ts.DiagnosticCategory.Error, key: "readonly_modifier_can_only_appear_on_a_property_declaration_or_index_signature_1024", message: "'readonly' modifier can only appear on a property declaration or index signature." },
+        Accessibility_modifier_already_seen: { code: 1028, category: ts.DiagnosticCategory.Error, key: "Accessibility_modifier_already_seen_1028", message: "Accessibility modifier already seen." },
+        _0_modifier_must_precede_1_modifier: { code: 1029, category: ts.DiagnosticCategory.Error, key: "_0_modifier_must_precede_1_modifier_1029", message: "'{0}' modifier must precede '{1}' modifier." },
+        _0_modifier_already_seen: { code: 1030, category: ts.DiagnosticCategory.Error, key: "_0_modifier_already_seen_1030", message: "'{0}' modifier already seen." },
+        _0_modifier_cannot_appear_on_a_class_element: { code: 1031, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_class_element_1031", message: "'{0}' modifier cannot appear on a class element." },
+        super_must_be_followed_by_an_argument_list_or_member_access: { code: 1034, category: ts.DiagnosticCategory.Error, key: "super_must_be_followed_by_an_argument_list_or_member_access_1034", message: "'super' must be followed by an argument list or member access." },
+        Only_ambient_modules_can_use_quoted_names: { code: 1035, category: ts.DiagnosticCategory.Error, key: "Only_ambient_modules_can_use_quoted_names_1035", message: "Only ambient modules can use quoted names." },
+        Statements_are_not_allowed_in_ambient_contexts: { code: 1036, category: ts.DiagnosticCategory.Error, key: "Statements_are_not_allowed_in_ambient_contexts_1036", message: "Statements are not allowed in ambient contexts." },
+        A_declare_modifier_cannot_be_used_in_an_already_ambient_context: { code: 1038, category: ts.DiagnosticCategory.Error, key: "A_declare_modifier_cannot_be_used_in_an_already_ambient_context_1038", message: "A 'declare' modifier cannot be used in an already ambient context." },
+        Initializers_are_not_allowed_in_ambient_contexts: { code: 1039, category: ts.DiagnosticCategory.Error, key: "Initializers_are_not_allowed_in_ambient_contexts_1039", message: "Initializers are not allowed in ambient contexts." },
+        _0_modifier_cannot_be_used_in_an_ambient_context: { code: 1040, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_in_an_ambient_context_1040", message: "'{0}' modifier cannot be used in an ambient context." },
+        _0_modifier_cannot_be_used_with_a_class_declaration: { code: 1041, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_with_a_class_declaration_1041", message: "'{0}' modifier cannot be used with a class declaration." },
+        _0_modifier_cannot_be_used_here: { code: 1042, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_here_1042", message: "'{0}' modifier cannot be used here." },
+        _0_modifier_cannot_appear_on_a_data_property: { code: 1043, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_data_property_1043", message: "'{0}' modifier cannot appear on a data property." },
+        _0_modifier_cannot_appear_on_a_module_or_namespace_element: { code: 1044, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_module_or_namespace_element_1044", message: "'{0}' modifier cannot appear on a module or namespace element." },
+        A_0_modifier_cannot_be_used_with_an_interface_declaration: { code: 1045, category: ts.DiagnosticCategory.Error, key: "A_0_modifier_cannot_be_used_with_an_interface_declaration_1045", message: "A '{0}' modifier cannot be used with an interface declaration." },
+        A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file: { code: 1046, category: ts.DiagnosticCategory.Error, key: "A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file_1046", message: "A 'declare' modifier is required for a top level declaration in a .d.ts file." },
+        A_rest_parameter_cannot_be_optional: { code: 1047, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_cannot_be_optional_1047", message: "A rest parameter cannot be optional." },
+        A_rest_parameter_cannot_have_an_initializer: { code: 1048, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_cannot_have_an_initializer_1048", message: "A rest parameter cannot have an initializer." },
+        A_set_accessor_must_have_exactly_one_parameter: { code: 1049, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_must_have_exactly_one_parameter_1049", message: "A 'set' accessor must have exactly one parameter." },
+        A_set_accessor_cannot_have_an_optional_parameter: { code: 1051, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_cannot_have_an_optional_parameter_1051", message: "A 'set' accessor cannot have an optional parameter." },
+        A_set_accessor_parameter_cannot_have_an_initializer: { code: 1052, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_parameter_cannot_have_an_initializer_1052", message: "A 'set' accessor parameter cannot have an initializer." },
+        A_set_accessor_cannot_have_rest_parameter: { code: 1053, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_cannot_have_rest_parameter_1053", message: "A 'set' accessor cannot have rest parameter." },
+        A_get_accessor_cannot_have_parameters: { code: 1054, category: ts.DiagnosticCategory.Error, key: "A_get_accessor_cannot_have_parameters_1054", message: "A 'get' accessor cannot have parameters." },
+        Type_0_is_not_a_valid_async_function_return_type_in_ES5_SlashES3_because_it_does_not_refer_to_a_Promise_compatible_constructor_value: { code: 1055, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_a_valid_async_function_return_type_in_ES5_SlashES3_because_it_does_not_refer_to_a_Prom_1055", message: "Type '{0}' is not a valid async function return type in ES5/ES3 because it does not refer to a Promise-compatible constructor value." },
+        Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher: { code: 1056, category: ts.DiagnosticCategory.Error, key: "Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher_1056", message: "Accessors are only available when targeting ECMAScript 5 and higher." },
+        An_async_function_or_method_must_have_a_valid_awaitable_return_type: { code: 1057, category: ts.DiagnosticCategory.Error, key: "An_async_function_or_method_must_have_a_valid_awaitable_return_type_1057", message: "An async function or method must have a valid awaitable return type." },
+        The_return_type_of_an_async_function_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member: { code: 1058, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_an_async_function_must_either_be_a_valid_promise_or_must_not_contain_a_callable_t_1058", message: "The return type of an async function must either be a valid promise or must not contain a callable 'then' member." },
+        A_promise_must_have_a_then_method: { code: 1059, category: ts.DiagnosticCategory.Error, key: "A_promise_must_have_a_then_method_1059", message: "A promise must have a 'then' method." },
+        The_first_parameter_of_the_then_method_of_a_promise_must_be_a_callback: { code: 1060, category: ts.DiagnosticCategory.Error, key: "The_first_parameter_of_the_then_method_of_a_promise_must_be_a_callback_1060", message: "The first parameter of the 'then' method of a promise must be a callback." },
+        Enum_member_must_have_initializer: { code: 1061, category: ts.DiagnosticCategory.Error, key: "Enum_member_must_have_initializer_1061", message: "Enum member must have initializer." },
+        Type_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method: { code: 1062, category: ts.DiagnosticCategory.Error, key: "Type_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method_1062", message: "Type is referenced directly or indirectly in the fulfillment callback of its own 'then' method." },
+        An_export_assignment_cannot_be_used_in_a_namespace: { code: 1063, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_cannot_be_used_in_a_namespace_1063", message: "An export assignment cannot be used in a namespace." },
+        The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type: { code: 1064, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type_1064", message: "The return type of an async function or method must be the global Promise<T> type." },
+        In_ambient_enum_declarations_member_initializer_must_be_constant_expression: { code: 1066, category: ts.DiagnosticCategory.Error, key: "In_ambient_enum_declarations_member_initializer_must_be_constant_expression_1066", message: "In ambient enum declarations member initializer must be constant expression." },
+        Unexpected_token_A_constructor_method_accessor_or_property_was_expected: { code: 1068, category: ts.DiagnosticCategory.Error, key: "Unexpected_token_A_constructor_method_accessor_or_property_was_expected_1068", message: "Unexpected token. A constructor, method, accessor, or property was expected." },
+        _0_modifier_cannot_appear_on_a_type_member: { code: 1070, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_type_member_1070", message: "'{0}' modifier cannot appear on a type member." },
+        _0_modifier_cannot_appear_on_an_index_signature: { code: 1071, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_an_index_signature_1071", message: "'{0}' modifier cannot appear on an index signature." },
+        A_0_modifier_cannot_be_used_with_an_import_declaration: { code: 1079, category: ts.DiagnosticCategory.Error, key: "A_0_modifier_cannot_be_used_with_an_import_declaration_1079", message: "A '{0}' modifier cannot be used with an import declaration." },
+        Invalid_reference_directive_syntax: { code: 1084, category: ts.DiagnosticCategory.Error, key: "Invalid_reference_directive_syntax_1084", message: "Invalid 'reference' directive syntax." },
+        Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher_Use_the_syntax_0: { code: 1085, category: ts.DiagnosticCategory.Error, key: "Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher_Use_the_syntax_0_1085", message: "Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '{0}'." },
+        An_accessor_cannot_be_declared_in_an_ambient_context: { code: 1086, category: ts.DiagnosticCategory.Error, key: "An_accessor_cannot_be_declared_in_an_ambient_context_1086", message: "An accessor cannot be declared in an ambient context." },
+        _0_modifier_cannot_appear_on_a_constructor_declaration: { code: 1089, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_constructor_declaration_1089", message: "'{0}' modifier cannot appear on a constructor declaration." },
+        _0_modifier_cannot_appear_on_a_parameter: { code: 1090, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_parameter_1090", message: "'{0}' modifier cannot appear on a parameter." },
+        Only_a_single_variable_declaration_is_allowed_in_a_for_in_statement: { code: 1091, category: ts.DiagnosticCategory.Error, key: "Only_a_single_variable_declaration_is_allowed_in_a_for_in_statement_1091", message: "Only a single variable declaration is allowed in a 'for...in' statement." },
+        Type_parameters_cannot_appear_on_a_constructor_declaration: { code: 1092, category: ts.DiagnosticCategory.Error, key: "Type_parameters_cannot_appear_on_a_constructor_declaration_1092", message: "Type parameters cannot appear on a constructor declaration." },
+        Type_annotation_cannot_appear_on_a_constructor_declaration: { code: 1093, category: ts.DiagnosticCategory.Error, key: "Type_annotation_cannot_appear_on_a_constructor_declaration_1093", message: "Type annotation cannot appear on a constructor declaration." },
+        An_accessor_cannot_have_type_parameters: { code: 1094, category: ts.DiagnosticCategory.Error, key: "An_accessor_cannot_have_type_parameters_1094", message: "An accessor cannot have type parameters." },
+        A_set_accessor_cannot_have_a_return_type_annotation: { code: 1095, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_cannot_have_a_return_type_annotation_1095", message: "A 'set' accessor cannot have a return type annotation." },
+        An_index_signature_must_have_exactly_one_parameter: { code: 1096, category: ts.DiagnosticCategory.Error, key: "An_index_signature_must_have_exactly_one_parameter_1096", message: "An index signature must have exactly one parameter." },
+        _0_list_cannot_be_empty: { code: 1097, category: ts.DiagnosticCategory.Error, key: "_0_list_cannot_be_empty_1097", message: "'{0}' list cannot be empty." },
+        Type_parameter_list_cannot_be_empty: { code: 1098, category: ts.DiagnosticCategory.Error, key: "Type_parameter_list_cannot_be_empty_1098", message: "Type parameter list cannot be empty." },
+        Type_argument_list_cannot_be_empty: { code: 1099, category: ts.DiagnosticCategory.Error, key: "Type_argument_list_cannot_be_empty_1099", message: "Type argument list cannot be empty." },
+        Invalid_use_of_0_in_strict_mode: { code: 1100, category: ts.DiagnosticCategory.Error, key: "Invalid_use_of_0_in_strict_mode_1100", message: "Invalid use of '{0}' in strict mode." },
+        with_statements_are_not_allowed_in_strict_mode: { code: 1101, category: ts.DiagnosticCategory.Error, key: "with_statements_are_not_allowed_in_strict_mode_1101", message: "'with' statements are not allowed in strict mode." },
+        delete_cannot_be_called_on_an_identifier_in_strict_mode: { code: 1102, category: ts.DiagnosticCategory.Error, key: "delete_cannot_be_called_on_an_identifier_in_strict_mode_1102", message: "'delete' cannot be called on an identifier in strict mode." },
+        A_for_await_of_statement_is_only_allowed_within_an_async_function_or_async_generator: { code: 1103, category: ts.DiagnosticCategory.Error, key: "A_for_await_of_statement_is_only_allowed_within_an_async_function_or_async_generator_1103", message: "A 'for-await-of' statement is only allowed within an async function or async generator." },
+        A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement: { code: 1104, category: ts.DiagnosticCategory.Error, key: "A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement_1104", message: "A 'continue' statement can only be used within an enclosing iteration statement." },
+        A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement: { code: 1105, category: ts.DiagnosticCategory.Error, key: "A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement_1105", message: "A 'break' statement can only be used within an enclosing iteration or switch statement." },
+        Jump_target_cannot_cross_function_boundary: { code: 1107, category: ts.DiagnosticCategory.Error, key: "Jump_target_cannot_cross_function_boundary_1107", message: "Jump target cannot cross function boundary." },
+        A_return_statement_can_only_be_used_within_a_function_body: { code: 1108, category: ts.DiagnosticCategory.Error, key: "A_return_statement_can_only_be_used_within_a_function_body_1108", message: "A 'return' statement can only be used within a function body." },
+        Expression_expected: { code: 1109, category: ts.DiagnosticCategory.Error, key: "Expression_expected_1109", message: "Expression expected." },
+        Type_expected: { code: 1110, category: ts.DiagnosticCategory.Error, key: "Type_expected_1110", message: "Type expected." },
+        A_default_clause_cannot_appear_more_than_once_in_a_switch_statement: { code: 1113, category: ts.DiagnosticCategory.Error, key: "A_default_clause_cannot_appear_more_than_once_in_a_switch_statement_1113", message: "A 'default' clause cannot appear more than once in a 'switch' statement." },
+        Duplicate_label_0: { code: 1114, category: ts.DiagnosticCategory.Error, key: "Duplicate_label_0_1114", message: "Duplicate label '{0}'." },
+        A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement: { code: 1115, category: ts.DiagnosticCategory.Error, key: "A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement_1115", message: "A 'continue' statement can only jump to a label of an enclosing iteration statement." },
+        A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement: { code: 1116, category: ts.DiagnosticCategory.Error, key: "A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement_1116", message: "A 'break' statement can only jump to a label of an enclosing statement." },
+        An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode: { code: 1117, category: ts.DiagnosticCategory.Error, key: "An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode_1117", message: "An object literal cannot have multiple properties with the same name in strict mode." },
+        An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name: { code: 1118, category: ts.DiagnosticCategory.Error, key: "An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name_1118", message: "An object literal cannot have multiple get/set accessors with the same name." },
+        An_object_literal_cannot_have_property_and_accessor_with_the_same_name: { code: 1119, category: ts.DiagnosticCategory.Error, key: "An_object_literal_cannot_have_property_and_accessor_with_the_same_name_1119", message: "An object literal cannot have property and accessor with the same name." },
+        An_export_assignment_cannot_have_modifiers: { code: 1120, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_cannot_have_modifiers_1120", message: "An export assignment cannot have modifiers." },
+        Octal_literals_are_not_allowed_in_strict_mode: { code: 1121, category: ts.DiagnosticCategory.Error, key: "Octal_literals_are_not_allowed_in_strict_mode_1121", message: "Octal literals are not allowed in strict mode." },
+        A_tuple_type_element_list_cannot_be_empty: { code: 1122, category: ts.DiagnosticCategory.Error, key: "A_tuple_type_element_list_cannot_be_empty_1122", message: "A tuple type element list cannot be empty." },
+        Variable_declaration_list_cannot_be_empty: { code: 1123, category: ts.DiagnosticCategory.Error, key: "Variable_declaration_list_cannot_be_empty_1123", message: "Variable declaration list cannot be empty." },
+        Digit_expected: { code: 1124, category: ts.DiagnosticCategory.Error, key: "Digit_expected_1124", message: "Digit expected." },
+        Hexadecimal_digit_expected: { code: 1125, category: ts.DiagnosticCategory.Error, key: "Hexadecimal_digit_expected_1125", message: "Hexadecimal digit expected." },
+        Unexpected_end_of_text: { code: 1126, category: ts.DiagnosticCategory.Error, key: "Unexpected_end_of_text_1126", message: "Unexpected end of text." },
+        Invalid_character: { code: 1127, category: ts.DiagnosticCategory.Error, key: "Invalid_character_1127", message: "Invalid character." },
+        Declaration_or_statement_expected: { code: 1128, category: ts.DiagnosticCategory.Error, key: "Declaration_or_statement_expected_1128", message: "Declaration or statement expected." },
+        Statement_expected: { code: 1129, category: ts.DiagnosticCategory.Error, key: "Statement_expected_1129", message: "Statement expected." },
+        case_or_default_expected: { code: 1130, category: ts.DiagnosticCategory.Error, key: "case_or_default_expected_1130", message: "'case' or 'default' expected." },
+        Property_or_signature_expected: { code: 1131, category: ts.DiagnosticCategory.Error, key: "Property_or_signature_expected_1131", message: "Property or signature expected." },
+        Enum_member_expected: { code: 1132, category: ts.DiagnosticCategory.Error, key: "Enum_member_expected_1132", message: "Enum member expected." },
+        Variable_declaration_expected: { code: 1134, category: ts.DiagnosticCategory.Error, key: "Variable_declaration_expected_1134", message: "Variable declaration expected." },
+        Argument_expression_expected: { code: 1135, category: ts.DiagnosticCategory.Error, key: "Argument_expression_expected_1135", message: "Argument expression expected." },
+        Property_assignment_expected: { code: 1136, category: ts.DiagnosticCategory.Error, key: "Property_assignment_expected_1136", message: "Property assignment expected." },
+        Expression_or_comma_expected: { code: 1137, category: ts.DiagnosticCategory.Error, key: "Expression_or_comma_expected_1137", message: "Expression or comma expected." },
+        Parameter_declaration_expected: { code: 1138, category: ts.DiagnosticCategory.Error, key: "Parameter_declaration_expected_1138", message: "Parameter declaration expected." },
+        Type_parameter_declaration_expected: { code: 1139, category: ts.DiagnosticCategory.Error, key: "Type_parameter_declaration_expected_1139", message: "Type parameter declaration expected." },
+        Type_argument_expected: { code: 1140, category: ts.DiagnosticCategory.Error, key: "Type_argument_expected_1140", message: "Type argument expected." },
+        String_literal_expected: { code: 1141, category: ts.DiagnosticCategory.Error, key: "String_literal_expected_1141", message: "String literal expected." },
+        Line_break_not_permitted_here: { code: 1142, category: ts.DiagnosticCategory.Error, key: "Line_break_not_permitted_here_1142", message: "Line break not permitted here." },
+        or_expected: { code: 1144, category: ts.DiagnosticCategory.Error, key: "or_expected_1144", message: "'{' or ';' expected." },
+        Declaration_expected: { code: 1146, category: ts.DiagnosticCategory.Error, key: "Declaration_expected_1146", message: "Declaration expected." },
+        Import_declarations_in_a_namespace_cannot_reference_a_module: { code: 1147, category: ts.DiagnosticCategory.Error, key: "Import_declarations_in_a_namespace_cannot_reference_a_module_1147", message: "Import declarations in a namespace cannot reference a module." },
+        Cannot_use_imports_exports_or_module_augmentations_when_module_is_none: { code: 1148, category: ts.DiagnosticCategory.Error, key: "Cannot_use_imports_exports_or_module_augmentations_when_module_is_none_1148", message: "Cannot use imports, exports, or module augmentations when '--module' is 'none'." },
+        File_name_0_differs_from_already_included_file_name_1_only_in_casing: { code: 1149, category: ts.DiagnosticCategory.Error, key: "File_name_0_differs_from_already_included_file_name_1_only_in_casing_1149", message: "File name '{0}' differs from already included file name '{1}' only in casing." },
+        new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead: { code: 1150, category: ts.DiagnosticCategory.Error, key: "new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead_1150", message: "'new T[]' cannot be used to create an array. Use 'new Array<T>()' instead." },
+        const_declarations_must_be_initialized: { code: 1155, category: ts.DiagnosticCategory.Error, key: "const_declarations_must_be_initialized_1155", message: "'const' declarations must be initialized." },
+        const_declarations_can_only_be_declared_inside_a_block: { code: 1156, category: ts.DiagnosticCategory.Error, key: "const_declarations_can_only_be_declared_inside_a_block_1156", message: "'const' declarations can only be declared inside a block." },
+        let_declarations_can_only_be_declared_inside_a_block: { code: 1157, category: ts.DiagnosticCategory.Error, key: "let_declarations_can_only_be_declared_inside_a_block_1157", message: "'let' declarations can only be declared inside a block." },
+        Unterminated_template_literal: { code: 1160, category: ts.DiagnosticCategory.Error, key: "Unterminated_template_literal_1160", message: "Unterminated template literal." },
+        Unterminated_regular_expression_literal: { code: 1161, category: ts.DiagnosticCategory.Error, key: "Unterminated_regular_expression_literal_1161", message: "Unterminated regular expression literal." },
+        An_object_member_cannot_be_declared_optional: { code: 1162, category: ts.DiagnosticCategory.Error, key: "An_object_member_cannot_be_declared_optional_1162", message: "An object member cannot be declared optional." },
+        A_yield_expression_is_only_allowed_in_a_generator_body: { code: 1163, category: ts.DiagnosticCategory.Error, key: "A_yield_expression_is_only_allowed_in_a_generator_body_1163", message: "A 'yield' expression is only allowed in a generator body." },
+        Computed_property_names_are_not_allowed_in_enums: { code: 1164, category: ts.DiagnosticCategory.Error, key: "Computed_property_names_are_not_allowed_in_enums_1164", message: "Computed property names are not allowed in enums." },
+        A_computed_property_name_in_an_ambient_context_must_directly_refer_to_a_built_in_symbol: { code: 1165, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_an_ambient_context_must_directly_refer_to_a_built_in_symbol_1165", message: "A computed property name in an ambient context must directly refer to a built-in symbol." },
+        A_computed_property_name_in_a_class_property_declaration_must_directly_refer_to_a_built_in_symbol: { code: 1166, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_a_class_property_declaration_must_directly_refer_to_a_built_in_symbol_1166", message: "A computed property name in a class property declaration must directly refer to a built-in symbol." },
+        A_computed_property_name_in_a_method_overload_must_directly_refer_to_a_built_in_symbol: { code: 1168, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_a_method_overload_must_directly_refer_to_a_built_in_symbol_1168", message: "A computed property name in a method overload must directly refer to a built-in symbol." },
+        A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol: { code: 1169, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol_1169", message: "A computed property name in an interface must directly refer to a built-in symbol." },
+        A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol: { code: 1170, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol_1170", message: "A computed property name in a type literal must directly refer to a built-in symbol." },
+        A_comma_expression_is_not_allowed_in_a_computed_property_name: { code: 1171, category: ts.DiagnosticCategory.Error, key: "A_comma_expression_is_not_allowed_in_a_computed_property_name_1171", message: "A comma expression is not allowed in a computed property name." },
+        extends_clause_already_seen: { code: 1172, category: ts.DiagnosticCategory.Error, key: "extends_clause_already_seen_1172", message: "'extends' clause already seen." },
+        extends_clause_must_precede_implements_clause: { code: 1173, category: ts.DiagnosticCategory.Error, key: "extends_clause_must_precede_implements_clause_1173", message: "'extends' clause must precede 'implements' clause." },
+        Classes_can_only_extend_a_single_class: { code: 1174, category: ts.DiagnosticCategory.Error, key: "Classes_can_only_extend_a_single_class_1174", message: "Classes can only extend a single class." },
+        implements_clause_already_seen: { code: 1175, category: ts.DiagnosticCategory.Error, key: "implements_clause_already_seen_1175", message: "'implements' clause already seen." },
+        Interface_declaration_cannot_have_implements_clause: { code: 1176, category: ts.DiagnosticCategory.Error, key: "Interface_declaration_cannot_have_implements_clause_1176", message: "Interface declaration cannot have 'implements' clause." },
+        Binary_digit_expected: { code: 1177, category: ts.DiagnosticCategory.Error, key: "Binary_digit_expected_1177", message: "Binary digit expected." },
+        Octal_digit_expected: { code: 1178, category: ts.DiagnosticCategory.Error, key: "Octal_digit_expected_1178", message: "Octal digit expected." },
+        Unexpected_token_expected: { code: 1179, category: ts.DiagnosticCategory.Error, key: "Unexpected_token_expected_1179", message: "Unexpected token. '{' expected." },
+        Property_destructuring_pattern_expected: { code: 1180, category: ts.DiagnosticCategory.Error, key: "Property_destructuring_pattern_expected_1180", message: "Property destructuring pattern expected." },
+        Array_element_destructuring_pattern_expected: { code: 1181, category: ts.DiagnosticCategory.Error, key: "Array_element_destructuring_pattern_expected_1181", message: "Array element destructuring pattern expected." },
+        A_destructuring_declaration_must_have_an_initializer: { code: 1182, category: ts.DiagnosticCategory.Error, key: "A_destructuring_declaration_must_have_an_initializer_1182", message: "A destructuring declaration must have an initializer." },
+        An_implementation_cannot_be_declared_in_ambient_contexts: { code: 1183, category: ts.DiagnosticCategory.Error, key: "An_implementation_cannot_be_declared_in_ambient_contexts_1183", message: "An implementation cannot be declared in ambient contexts." },
+        Modifiers_cannot_appear_here: { code: 1184, category: ts.DiagnosticCategory.Error, key: "Modifiers_cannot_appear_here_1184", message: "Modifiers cannot appear here." },
+        Merge_conflict_marker_encountered: { code: 1185, category: ts.DiagnosticCategory.Error, key: "Merge_conflict_marker_encountered_1185", message: "Merge conflict marker encountered." },
+        A_rest_element_cannot_have_an_initializer: { code: 1186, category: ts.DiagnosticCategory.Error, key: "A_rest_element_cannot_have_an_initializer_1186", message: "A rest element cannot have an initializer." },
+        A_parameter_property_may_not_be_declared_using_a_binding_pattern: { code: 1187, category: ts.DiagnosticCategory.Error, key: "A_parameter_property_may_not_be_declared_using_a_binding_pattern_1187", message: "A parameter property may not be declared using a binding pattern." },
+        Only_a_single_variable_declaration_is_allowed_in_a_for_of_statement: { code: 1188, category: ts.DiagnosticCategory.Error, key: "Only_a_single_variable_declaration_is_allowed_in_a_for_of_statement_1188", message: "Only a single variable declaration is allowed in a 'for...of' statement." },
+        The_variable_declaration_of_a_for_in_statement_cannot_have_an_initializer: { code: 1189, category: ts.DiagnosticCategory.Error, key: "The_variable_declaration_of_a_for_in_statement_cannot_have_an_initializer_1189", message: "The variable declaration of a 'for...in' statement cannot have an initializer." },
+        The_variable_declaration_of_a_for_of_statement_cannot_have_an_initializer: { code: 1190, category: ts.DiagnosticCategory.Error, key: "The_variable_declaration_of_a_for_of_statement_cannot_have_an_initializer_1190", message: "The variable declaration of a 'for...of' statement cannot have an initializer." },
+        An_import_declaration_cannot_have_modifiers: { code: 1191, category: ts.DiagnosticCategory.Error, key: "An_import_declaration_cannot_have_modifiers_1191", message: "An import declaration cannot have modifiers." },
+        Module_0_has_no_default_export: { code: 1192, category: ts.DiagnosticCategory.Error, key: "Module_0_has_no_default_export_1192", message: "Module '{0}' has no default export." },
+        An_export_declaration_cannot_have_modifiers: { code: 1193, category: ts.DiagnosticCategory.Error, key: "An_export_declaration_cannot_have_modifiers_1193", message: "An export declaration cannot have modifiers." },
+        Export_declarations_are_not_permitted_in_a_namespace: { code: 1194, category: ts.DiagnosticCategory.Error, key: "Export_declarations_are_not_permitted_in_a_namespace_1194", message: "Export declarations are not permitted in a namespace." },
+        Catch_clause_variable_cannot_have_a_type_annotation: { code: 1196, category: ts.DiagnosticCategory.Error, key: "Catch_clause_variable_cannot_have_a_type_annotation_1196", message: "Catch clause variable cannot have a type annotation." },
+        Catch_clause_variable_cannot_have_an_initializer: { code: 1197, category: ts.DiagnosticCategory.Error, key: "Catch_clause_variable_cannot_have_an_initializer_1197", message: "Catch clause variable cannot have an initializer." },
+        An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive: { code: 1198, category: ts.DiagnosticCategory.Error, key: "An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive_1198", message: "An extended Unicode escape value must be between 0x0 and 0x10FFFF inclusive." },
+        Unterminated_Unicode_escape_sequence: { code: 1199, category: ts.DiagnosticCategory.Error, key: "Unterminated_Unicode_escape_sequence_1199", message: "Unterminated Unicode escape sequence." },
+        Line_terminator_not_permitted_before_arrow: { code: 1200, category: ts.DiagnosticCategory.Error, key: "Line_terminator_not_permitted_before_arrow_1200", message: "Line terminator not permitted before arrow." },
+        Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead: { code: 1202, category: ts.DiagnosticCategory.Error, key: "Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asteri_1202", message: "Import assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'import * as ns from \"mod\"', 'import {a} from \"mod\"', 'import d from \"mod\"', or another module format instead." },
+        Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_or_another_module_format_instead: { code: 1203, category: ts.DiagnosticCategory.Error, key: "Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_defaul_1203", message: "Export assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'export default' or another module format instead." },
+        Cannot_re_export_a_type_when_the_isolatedModules_flag_is_provided: { code: 1205, category: ts.DiagnosticCategory.Error, key: "Cannot_re_export_a_type_when_the_isolatedModules_flag_is_provided_1205", message: "Cannot re-export a type when the '--isolatedModules' flag is provided." },
+        Decorators_are_not_valid_here: { code: 1206, category: ts.DiagnosticCategory.Error, key: "Decorators_are_not_valid_here_1206", message: "Decorators are not valid here." },
+        Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name: { code: 1207, category: ts.DiagnosticCategory.Error, key: "Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name_1207", message: "Decorators cannot be applied to multiple get/set accessors of the same name." },
+        Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided: { code: 1208, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided_1208", message: "Cannot compile namespaces when the '--isolatedModules' flag is provided." },
+        Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided: { code: 1209, category: ts.DiagnosticCategory.Error, key: "Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided_1209", message: "Ambient const enums are not allowed when the '--isolatedModules' flag is provided." },
+        Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode: { code: 1210, category: ts.DiagnosticCategory.Error, key: "Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode_1210", message: "Invalid use of '{0}'. Class definitions are automatically in strict mode." },
+        A_class_declaration_without_the_default_modifier_must_have_a_name: { code: 1211, category: ts.DiagnosticCategory.Error, key: "A_class_declaration_without_the_default_modifier_must_have_a_name_1211", message: "A class declaration without the 'default' modifier must have a name." },
+        Identifier_expected_0_is_a_reserved_word_in_strict_mode: { code: 1212, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_0_is_a_reserved_word_in_strict_mode_1212", message: "Identifier expected. '{0}' is a reserved word in strict mode." },
+        Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_strict_mode: { code: 1213, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_stric_1213", message: "Identifier expected. '{0}' is a reserved word in strict mode. Class definitions are automatically in strict mode." },
+        Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode: { code: 1214, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode_1214", message: "Identifier expected. '{0}' is a reserved word in strict mode. Modules are automatically in strict mode." },
+        Invalid_use_of_0_Modules_are_automatically_in_strict_mode: { code: 1215, category: ts.DiagnosticCategory.Error, key: "Invalid_use_of_0_Modules_are_automatically_in_strict_mode_1215", message: "Invalid use of '{0}'. Modules are automatically in strict mode." },
+        Identifier_expected_esModule_is_reserved_as_an_exported_marker_when_transforming_ECMAScript_modules: { code: 1216, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_esModule_is_reserved_as_an_exported_marker_when_transforming_ECMAScript_modules_1216", message: "Identifier expected. '__esModule' is reserved as an exported marker when transforming ECMAScript modules." },
+        Export_assignment_is_not_supported_when_module_flag_is_system: { code: 1218, category: ts.DiagnosticCategory.Error, key: "Export_assignment_is_not_supported_when_module_flag_is_system_1218", message: "Export assignment is not supported when '--module' flag is 'system'." },
+        Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning: { code: 1219, category: ts.DiagnosticCategory.Error, key: "Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_t_1219", message: "Experimental support for decorators is a feature that is subject to change in a future release. Set the 'experimentalDecorators' option to remove this warning." },
+        Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher: { code: 1220, category: ts.DiagnosticCategory.Error, key: "Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher_1220", message: "Generators are only available when targeting ECMAScript 2015 or higher." },
+        Generators_are_not_allowed_in_an_ambient_context: { code: 1221, category: ts.DiagnosticCategory.Error, key: "Generators_are_not_allowed_in_an_ambient_context_1221", message: "Generators are not allowed in an ambient context." },
+        An_overload_signature_cannot_be_declared_as_a_generator: { code: 1222, category: ts.DiagnosticCategory.Error, key: "An_overload_signature_cannot_be_declared_as_a_generator_1222", message: "An overload signature cannot be declared as a generator." },
+        _0_tag_already_specified: { code: 1223, category: ts.DiagnosticCategory.Error, key: "_0_tag_already_specified_1223", message: "'{0}' tag already specified." },
+        Signature_0_must_have_a_type_predicate: { code: 1224, category: ts.DiagnosticCategory.Error, key: "Signature_0_must_have_a_type_predicate_1224", message: "Signature '{0}' must have a type predicate." },
+        Cannot_find_parameter_0: { code: 1225, category: ts.DiagnosticCategory.Error, key: "Cannot_find_parameter_0_1225", message: "Cannot find parameter '{0}'." },
+        Type_predicate_0_is_not_assignable_to_1: { code: 1226, category: ts.DiagnosticCategory.Error, key: "Type_predicate_0_is_not_assignable_to_1_1226", message: "Type predicate '{0}' is not assignable to '{1}'." },
+        Parameter_0_is_not_in_the_same_position_as_parameter_1: { code: 1227, category: ts.DiagnosticCategory.Error, key: "Parameter_0_is_not_in_the_same_position_as_parameter_1_1227", message: "Parameter '{0}' is not in the same position as parameter '{1}'." },
+        A_type_predicate_is_only_allowed_in_return_type_position_for_functions_and_methods: { code: 1228, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_is_only_allowed_in_return_type_position_for_functions_and_methods_1228", message: "A type predicate is only allowed in return type position for functions and methods." },
+        A_type_predicate_cannot_reference_a_rest_parameter: { code: 1229, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_cannot_reference_a_rest_parameter_1229", message: "A type predicate cannot reference a rest parameter." },
+        A_type_predicate_cannot_reference_element_0_in_a_binding_pattern: { code: 1230, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_cannot_reference_element_0_in_a_binding_pattern_1230", message: "A type predicate cannot reference element '{0}' in a binding pattern." },
+        An_export_assignment_can_only_be_used_in_a_module: { code: 1231, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_can_only_be_used_in_a_module_1231", message: "An export assignment can only be used in a module." },
+        An_import_declaration_can_only_be_used_in_a_namespace_or_module: { code: 1232, category: ts.DiagnosticCategory.Error, key: "An_import_declaration_can_only_be_used_in_a_namespace_or_module_1232", message: "An import declaration can only be used in a namespace or module." },
+        An_export_declaration_can_only_be_used_in_a_module: { code: 1233, category: ts.DiagnosticCategory.Error, key: "An_export_declaration_can_only_be_used_in_a_module_1233", message: "An export declaration can only be used in a module." },
+        An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file: { code: 1234, category: ts.DiagnosticCategory.Error, key: "An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file_1234", message: "An ambient module declaration is only allowed at the top level in a file." },
+        A_namespace_declaration_is_only_allowed_in_a_namespace_or_module: { code: 1235, category: ts.DiagnosticCategory.Error, key: "A_namespace_declaration_is_only_allowed_in_a_namespace_or_module_1235", message: "A namespace declaration is only allowed in a namespace or module." },
+        The_return_type_of_a_property_decorator_function_must_be_either_void_or_any: { code: 1236, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_a_property_decorator_function_must_be_either_void_or_any_1236", message: "The return type of a property decorator function must be either 'void' or 'any'." },
+        The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any: { code: 1237, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any_1237", message: "The return type of a parameter decorator function must be either 'void' or 'any'." },
+        Unable_to_resolve_signature_of_class_decorator_when_called_as_an_expression: { code: 1238, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_class_decorator_when_called_as_an_expression_1238", message: "Unable to resolve signature of class decorator when called as an expression." },
+        Unable_to_resolve_signature_of_parameter_decorator_when_called_as_an_expression: { code: 1239, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_parameter_decorator_when_called_as_an_expression_1239", message: "Unable to resolve signature of parameter decorator when called as an expression." },
+        Unable_to_resolve_signature_of_property_decorator_when_called_as_an_expression: { code: 1240, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_property_decorator_when_called_as_an_expression_1240", message: "Unable to resolve signature of property decorator when called as an expression." },
+        Unable_to_resolve_signature_of_method_decorator_when_called_as_an_expression: { code: 1241, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_method_decorator_when_called_as_an_expression_1241", message: "Unable to resolve signature of method decorator when called as an expression." },
+        abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration: { code: 1242, category: ts.DiagnosticCategory.Error, key: "abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration_1242", message: "'abstract' modifier can only appear on a class, method, or property declaration." },
+        _0_modifier_cannot_be_used_with_1_modifier: { code: 1243, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_with_1_modifier_1243", message: "'{0}' modifier cannot be used with '{1}' modifier." },
+        Abstract_methods_can_only_appear_within_an_abstract_class: { code: 1244, category: ts.DiagnosticCategory.Error, key: "Abstract_methods_can_only_appear_within_an_abstract_class_1244", message: "Abstract methods can only appear within an abstract class." },
+        Method_0_cannot_have_an_implementation_because_it_is_marked_abstract: { code: 1245, category: ts.DiagnosticCategory.Error, key: "Method_0_cannot_have_an_implementation_because_it_is_marked_abstract_1245", message: "Method '{0}' cannot have an implementation because it is marked abstract." },
+        An_interface_property_cannot_have_an_initializer: { code: 1246, category: ts.DiagnosticCategory.Error, key: "An_interface_property_cannot_have_an_initializer_1246", message: "An interface property cannot have an initializer." },
+        A_type_literal_property_cannot_have_an_initializer: { code: 1247, category: ts.DiagnosticCategory.Error, key: "A_type_literal_property_cannot_have_an_initializer_1247", message: "A type literal property cannot have an initializer." },
+        A_class_member_cannot_have_the_0_keyword: { code: 1248, category: ts.DiagnosticCategory.Error, key: "A_class_member_cannot_have_the_0_keyword_1248", message: "A class member cannot have the '{0}' keyword." },
+        A_decorator_can_only_decorate_a_method_implementation_not_an_overload: { code: 1249, category: ts.DiagnosticCategory.Error, key: "A_decorator_can_only_decorate_a_method_implementation_not_an_overload_1249", message: "A decorator can only decorate a method implementation, not an overload." },
+        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5: { code: 1250, category: ts.DiagnosticCategory.Error, key: "Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_1250", message: "Function declarations are not allowed inside blocks in strict mode when targeting 'ES3' or 'ES5'." },
+        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Class_definitions_are_automatically_in_strict_mode: { code: 1251, category: ts.DiagnosticCategory.Error, key: "Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Class_d_1251", message: "Function declarations are not allowed inside blocks in strict mode when targeting 'ES3' or 'ES5'. Class definitions are automatically in strict mode." },
+        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_are_automatically_in_strict_mode: { code: 1252, category: ts.DiagnosticCategory.Error, key: "Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_1252", message: "Function declarations are not allowed inside blocks in strict mode when targeting 'ES3' or 'ES5'. Modules are automatically in strict mode." },
+        _0_tag_cannot_be_used_independently_as_a_top_level_JSDoc_tag: { code: 1253, category: ts.DiagnosticCategory.Error, key: "_0_tag_cannot_be_used_independently_as_a_top_level_JSDoc_tag_1253", message: "'{0}' tag cannot be used independently as a top level JSDoc tag." },
+        A_const_initializer_in_an_ambient_context_must_be_a_string_or_numeric_literal: { code: 1254, category: ts.DiagnosticCategory.Error, key: "A_const_initializer_in_an_ambient_context_must_be_a_string_or_numeric_literal_1254", message: "A 'const' initializer in an ambient context must be a string or numeric literal." },
+        with_statements_are_not_allowed_in_an_async_function_block: { code: 1300, category: ts.DiagnosticCategory.Error, key: "with_statements_are_not_allowed_in_an_async_function_block_1300", message: "'with' statements are not allowed in an async function block." },
+        await_expression_is_only_allowed_within_an_async_function: { code: 1308, category: ts.DiagnosticCategory.Error, key: "await_expression_is_only_allowed_within_an_async_function_1308", message: "'await' expression is only allowed within an async function." },
+        can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment: { code: 1312, category: ts.DiagnosticCategory.Error, key: "can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment_1312", message: "'=' can only be used in an object literal property inside a destructuring assignment." },
+        The_body_of_an_if_statement_cannot_be_the_empty_statement: { code: 1313, category: ts.DiagnosticCategory.Error, key: "The_body_of_an_if_statement_cannot_be_the_empty_statement_1313", message: "The body of an 'if' statement cannot be the empty statement." },
+        Global_module_exports_may_only_appear_in_module_files: { code: 1314, category: ts.DiagnosticCategory.Error, key: "Global_module_exports_may_only_appear_in_module_files_1314", message: "Global module exports may only appear in module files." },
+        Global_module_exports_may_only_appear_in_declaration_files: { code: 1315, category: ts.DiagnosticCategory.Error, key: "Global_module_exports_may_only_appear_in_declaration_files_1315", message: "Global module exports may only appear in declaration files." },
+        Global_module_exports_may_only_appear_at_top_level: { code: 1316, category: ts.DiagnosticCategory.Error, key: "Global_module_exports_may_only_appear_at_top_level_1316", message: "Global module exports may only appear at top level." },
+        A_parameter_property_cannot_be_declared_using_a_rest_parameter: { code: 1317, category: ts.DiagnosticCategory.Error, key: "A_parameter_property_cannot_be_declared_using_a_rest_parameter_1317", message: "A parameter property cannot be declared using a rest parameter." },
+        An_abstract_accessor_cannot_have_an_implementation: { code: 1318, category: ts.DiagnosticCategory.Error, key: "An_abstract_accessor_cannot_have_an_implementation_1318", message: "An abstract accessor cannot have an implementation." },
+        A_default_export_can_only_be_used_in_an_ECMAScript_style_module: { code: 1319, category: ts.DiagnosticCategory.Error, key: "A_default_export_can_only_be_used_in_an_ECMAScript_style_module_1319", message: "A default export can only be used in an ECMAScript-style module." },
+        Type_of_await_operand_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member: { code: 1320, category: ts.DiagnosticCategory.Error, key: "Type_of_await_operand_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member_1320", message: "Type of 'await' operand must either be a valid promise or must not contain a callable 'then' member." },
+        Type_of_yield_operand_in_an_async_generator_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member: { code: 1321, category: ts.DiagnosticCategory.Error, key: "Type_of_yield_operand_in_an_async_generator_must_either_be_a_valid_promise_or_must_not_contain_a_cal_1321", message: "Type of 'yield' operand in an async generator must either be a valid promise or must not contain a callable 'then' member." },
+        Type_of_iterated_elements_of_a_yield_Asterisk_operand_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member: { code: 1322, category: ts.DiagnosticCategory.Error, key: "Type_of_iterated_elements_of_a_yield_Asterisk_operand_must_either_be_a_valid_promise_or_must_not_con_1322", message: "Type of iterated elements of a 'yield*' operand must either be a valid promise or must not contain a callable 'then' member." },
+        Dynamic_import_cannot_be_used_when_targeting_ECMAScript_2015_modules: { code: 1323, category: ts.DiagnosticCategory.Error, key: "Dynamic_import_cannot_be_used_when_targeting_ECMAScript_2015_modules_1323", message: "Dynamic import cannot be used when targeting ECMAScript 2015 modules." },
+        Dynamic_import_must_have_one_specifier_as_an_argument: { code: 1324, category: ts.DiagnosticCategory.Error, key: "Dynamic_import_must_have_one_specifier_as_an_argument_1324", message: "Dynamic import must have one specifier as an argument." },
+        Specifier_of_dynamic_import_cannot_be_spread_element: { code: 1325, category: ts.DiagnosticCategory.Error, key: "Specifier_of_dynamic_import_cannot_be_spread_element_1325", message: "Specifier of dynamic import cannot be spread element." },
+        Dynamic_import_cannot_have_type_arguments: { code: 1326, category: ts.DiagnosticCategory.Error, key: "Dynamic_import_cannot_have_type_arguments_1326", message: "Dynamic import cannot have type arguments" },
+        String_literal_with_double_quotes_expected: { code: 1327, category: ts.DiagnosticCategory.Error, key: "String_literal_with_double_quotes_expected_1327", message: "String literal with double quotes expected." },
+        Property_value_can_only_be_string_literal_numeric_literal_true_false_null_object_literal_or_array_literal: { code: 1328, category: ts.DiagnosticCategory.Error, key: "Property_value_can_only_be_string_literal_numeric_literal_true_false_null_object_literal_or_array_li_1328", message: "Property value can only be string literal, numeric literal, 'true', 'false', 'null', object literal or array literal." },
+        Duplicate_identifier_0: { code: 2300, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_2300", message: "Duplicate identifier '{0}'." },
+        Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor: { code: 2301, category: ts.DiagnosticCategory.Error, key: "Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor_2301", message: "Initializer of instance member variable '{0}' cannot reference identifier '{1}' declared in the constructor." },
+        Static_members_cannot_reference_class_type_parameters: { code: 2302, category: ts.DiagnosticCategory.Error, key: "Static_members_cannot_reference_class_type_parameters_2302", message: "Static members cannot reference class type parameters." },
+        Circular_definition_of_import_alias_0: { code: 2303, category: ts.DiagnosticCategory.Error, key: "Circular_definition_of_import_alias_0_2303", message: "Circular definition of import alias '{0}'." },
+        Cannot_find_name_0: { code: 2304, category: ts.DiagnosticCategory.Error, key: "Cannot_find_name_0_2304", message: "Cannot find name '{0}'." },
+        Module_0_has_no_exported_member_1: { code: 2305, category: ts.DiagnosticCategory.Error, key: "Module_0_has_no_exported_member_1_2305", message: "Module '{0}' has no exported member '{1}'." },
+        File_0_is_not_a_module: { code: 2306, category: ts.DiagnosticCategory.Error, key: "File_0_is_not_a_module_2306", message: "File '{0}' is not a module." },
+        Cannot_find_module_0: { code: 2307, category: ts.DiagnosticCategory.Error, key: "Cannot_find_module_0_2307", message: "Cannot find module '{0}'." },
+        Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambiguity: { code: 2308, category: ts.DiagnosticCategory.Error, key: "Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambig_2308", message: "Module {0} has already exported a member named '{1}'. Consider explicitly re-exporting to resolve the ambiguity." },
+        An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements: { code: 2309, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements_2309", message: "An export assignment cannot be used in a module with other exported elements." },
+        Type_0_recursively_references_itself_as_a_base_type: { code: 2310, category: ts.DiagnosticCategory.Error, key: "Type_0_recursively_references_itself_as_a_base_type_2310", message: "Type '{0}' recursively references itself as a base type." },
+        A_class_may_only_extend_another_class: { code: 2311, category: ts.DiagnosticCategory.Error, key: "A_class_may_only_extend_another_class_2311", message: "A class may only extend another class." },
+        An_interface_may_only_extend_a_class_or_another_interface: { code: 2312, category: ts.DiagnosticCategory.Error, key: "An_interface_may_only_extend_a_class_or_another_interface_2312", message: "An interface may only extend a class or another interface." },
+        Type_parameter_0_has_a_circular_constraint: { code: 2313, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_has_a_circular_constraint_2313", message: "Type parameter '{0}' has a circular constraint." },
+        Generic_type_0_requires_1_type_argument_s: { code: 2314, category: ts.DiagnosticCategory.Error, key: "Generic_type_0_requires_1_type_argument_s_2314", message: "Generic type '{0}' requires {1} type argument(s)." },
+        Type_0_is_not_generic: { code: 2315, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_generic_2315", message: "Type '{0}' is not generic." },
+        Global_type_0_must_be_a_class_or_interface_type: { code: 2316, category: ts.DiagnosticCategory.Error, key: "Global_type_0_must_be_a_class_or_interface_type_2316", message: "Global type '{0}' must be a class or interface type." },
+        Global_type_0_must_have_1_type_parameter_s: { code: 2317, category: ts.DiagnosticCategory.Error, key: "Global_type_0_must_have_1_type_parameter_s_2317", message: "Global type '{0}' must have {1} type parameter(s)." },
+        Cannot_find_global_type_0: { code: 2318, category: ts.DiagnosticCategory.Error, key: "Cannot_find_global_type_0_2318", message: "Cannot find global type '{0}'." },
+        Named_property_0_of_types_1_and_2_are_not_identical: { code: 2319, category: ts.DiagnosticCategory.Error, key: "Named_property_0_of_types_1_and_2_are_not_identical_2319", message: "Named property '{0}' of types '{1}' and '{2}' are not identical." },
+        Interface_0_cannot_simultaneously_extend_types_1_and_2: { code: 2320, category: ts.DiagnosticCategory.Error, key: "Interface_0_cannot_simultaneously_extend_types_1_and_2_2320", message: "Interface '{0}' cannot simultaneously extend types '{1}' and '{2}'." },
+        Excessive_stack_depth_comparing_types_0_and_1: { code: 2321, category: ts.DiagnosticCategory.Error, key: "Excessive_stack_depth_comparing_types_0_and_1_2321", message: "Excessive stack depth comparing types '{0}' and '{1}'." },
+        Type_0_is_not_assignable_to_type_1: { code: 2322, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_assignable_to_type_1_2322", message: "Type '{0}' is not assignable to type '{1}'." },
+        Cannot_redeclare_exported_variable_0: { code: 2323, category: ts.DiagnosticCategory.Error, key: "Cannot_redeclare_exported_variable_0_2323", message: "Cannot redeclare exported variable '{0}'." },
+        Property_0_is_missing_in_type_1: { code: 2324, category: ts.DiagnosticCategory.Error, key: "Property_0_is_missing_in_type_1_2324", message: "Property '{0}' is missing in type '{1}'." },
+        Property_0_is_private_in_type_1_but_not_in_type_2: { code: 2325, category: ts.DiagnosticCategory.Error, key: "Property_0_is_private_in_type_1_but_not_in_type_2_2325", message: "Property '{0}' is private in type '{1}' but not in type '{2}'." },
+        Types_of_property_0_are_incompatible: { code: 2326, category: ts.DiagnosticCategory.Error, key: "Types_of_property_0_are_incompatible_2326", message: "Types of property '{0}' are incompatible." },
+        Property_0_is_optional_in_type_1_but_required_in_type_2: { code: 2327, category: ts.DiagnosticCategory.Error, key: "Property_0_is_optional_in_type_1_but_required_in_type_2_2327", message: "Property '{0}' is optional in type '{1}' but required in type '{2}'." },
+        Types_of_parameters_0_and_1_are_incompatible: { code: 2328, category: ts.DiagnosticCategory.Error, key: "Types_of_parameters_0_and_1_are_incompatible_2328", message: "Types of parameters '{0}' and '{1}' are incompatible." },
+        Index_signature_is_missing_in_type_0: { code: 2329, category: ts.DiagnosticCategory.Error, key: "Index_signature_is_missing_in_type_0_2329", message: "Index signature is missing in type '{0}'." },
+        Index_signatures_are_incompatible: { code: 2330, category: ts.DiagnosticCategory.Error, key: "Index_signatures_are_incompatible_2330", message: "Index signatures are incompatible." },
+        this_cannot_be_referenced_in_a_module_or_namespace_body: { code: 2331, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_a_module_or_namespace_body_2331", message: "'this' cannot be referenced in a module or namespace body." },
+        this_cannot_be_referenced_in_current_location: { code: 2332, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_current_location_2332", message: "'this' cannot be referenced in current location." },
+        this_cannot_be_referenced_in_constructor_arguments: { code: 2333, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_constructor_arguments_2333", message: "'this' cannot be referenced in constructor arguments." },
+        this_cannot_be_referenced_in_a_static_property_initializer: { code: 2334, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_a_static_property_initializer_2334", message: "'this' cannot be referenced in a static property initializer." },
+        super_can_only_be_referenced_in_a_derived_class: { code: 2335, category: ts.DiagnosticCategory.Error, key: "super_can_only_be_referenced_in_a_derived_class_2335", message: "'super' can only be referenced in a derived class." },
+        super_cannot_be_referenced_in_constructor_arguments: { code: 2336, category: ts.DiagnosticCategory.Error, key: "super_cannot_be_referenced_in_constructor_arguments_2336", message: "'super' cannot be referenced in constructor arguments." },
+        Super_calls_are_not_permitted_outside_constructors_or_in_nested_functions_inside_constructors: { code: 2337, category: ts.DiagnosticCategory.Error, key: "Super_calls_are_not_permitted_outside_constructors_or_in_nested_functions_inside_constructors_2337", message: "Super calls are not permitted outside constructors or in nested functions inside constructors." },
+        super_property_access_is_permitted_only_in_a_constructor_member_function_or_member_accessor_of_a_derived_class: { code: 2338, category: ts.DiagnosticCategory.Error, key: "super_property_access_is_permitted_only_in_a_constructor_member_function_or_member_accessor_of_a_der_2338", message: "'super' property access is permitted only in a constructor, member function, or member accessor of a derived class." },
+        Property_0_does_not_exist_on_type_1: { code: 2339, category: ts.DiagnosticCategory.Error, key: "Property_0_does_not_exist_on_type_1_2339", message: "Property '{0}' does not exist on type '{1}'." },
+        Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword: { code: 2340, category: ts.DiagnosticCategory.Error, key: "Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword_2340", message: "Only public and protected methods of the base class are accessible via the 'super' keyword." },
+        Property_0_is_private_and_only_accessible_within_class_1: { code: 2341, category: ts.DiagnosticCategory.Error, key: "Property_0_is_private_and_only_accessible_within_class_1_2341", message: "Property '{0}' is private and only accessible within class '{1}'." },
+        An_index_expression_argument_must_be_of_type_string_number_symbol_or_any: { code: 2342, category: ts.DiagnosticCategory.Error, key: "An_index_expression_argument_must_be_of_type_string_number_symbol_or_any_2342", message: "An index expression argument must be of type 'string', 'number', 'symbol', or 'any'." },
+        This_syntax_requires_an_imported_helper_named_1_but_module_0_has_no_exported_member_1: { code: 2343, category: ts.DiagnosticCategory.Error, key: "This_syntax_requires_an_imported_helper_named_1_but_module_0_has_no_exported_member_1_2343", message: "This syntax requires an imported helper named '{1}', but module '{0}' has no exported member '{1}'." },
+        Type_0_does_not_satisfy_the_constraint_1: { code: 2344, category: ts.DiagnosticCategory.Error, key: "Type_0_does_not_satisfy_the_constraint_1_2344", message: "Type '{0}' does not satisfy the constraint '{1}'." },
+        Argument_of_type_0_is_not_assignable_to_parameter_of_type_1: { code: 2345, category: ts.DiagnosticCategory.Error, key: "Argument_of_type_0_is_not_assignable_to_parameter_of_type_1_2345", message: "Argument of type '{0}' is not assignable to parameter of type '{1}'." },
+        Call_target_does_not_contain_any_signatures: { code: 2346, category: ts.DiagnosticCategory.Error, key: "Call_target_does_not_contain_any_signatures_2346", message: "Call target does not contain any signatures." },
+        Untyped_function_calls_may_not_accept_type_arguments: { code: 2347, category: ts.DiagnosticCategory.Error, key: "Untyped_function_calls_may_not_accept_type_arguments_2347", message: "Untyped function calls may not accept type arguments." },
+        Value_of_type_0_is_not_callable_Did_you_mean_to_include_new: { code: 2348, category: ts.DiagnosticCategory.Error, key: "Value_of_type_0_is_not_callable_Did_you_mean_to_include_new_2348", message: "Value of type '{0}' is not callable. Did you mean to include 'new'?" },
+        Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures: { code: 2349, category: ts.DiagnosticCategory.Error, key: "Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatur_2349", message: "Cannot invoke an expression whose type lacks a call signature. Type '{0}' has no compatible call signatures." },
+        Only_a_void_function_can_be_called_with_the_new_keyword: { code: 2350, category: ts.DiagnosticCategory.Error, key: "Only_a_void_function_can_be_called_with_the_new_keyword_2350", message: "Only a void function can be called with the 'new' keyword." },
+        Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature: { code: 2351, category: ts.DiagnosticCategory.Error, key: "Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature_2351", message: "Cannot use 'new' with an expression whose type lacks a call or construct signature." },
+        Type_0_cannot_be_converted_to_type_1: { code: 2352, category: ts.DiagnosticCategory.Error, key: "Type_0_cannot_be_converted_to_type_1_2352", message: "Type '{0}' cannot be converted to type '{1}'." },
+        Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1: { code: 2353, category: ts.DiagnosticCategory.Error, key: "Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1_2353", message: "Object literal may only specify known properties, and '{0}' does not exist in type '{1}'." },
+        This_syntax_requires_an_imported_helper_but_module_0_cannot_be_found: { code: 2354, category: ts.DiagnosticCategory.Error, key: "This_syntax_requires_an_imported_helper_but_module_0_cannot_be_found_2354", message: "This syntax requires an imported helper but module '{0}' cannot be found." },
+        A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value: { code: 2355, category: ts.DiagnosticCategory.Error, key: "A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value_2355", message: "A function whose declared type is neither 'void' nor 'any' must return a value." },
+        An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type: { code: 2356, category: ts.DiagnosticCategory.Error, key: "An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type_2356", message: "An arithmetic operand must be of type 'any', 'number' or an enum type." },
+        The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_or_a_property_access: { code: 2357, category: ts.DiagnosticCategory.Error, key: "The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_or_a_property_access_2357", message: "The operand of an increment or decrement operator must be a variable or a property access." },
+        The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_parameter: { code: 2358, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_paramete_2358", message: "The left-hand side of an 'instanceof' expression must be of type 'any', an object type or a type parameter." },
+        The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_Function_interface_type: { code: 2359, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_F_2359", message: "The right-hand side of an 'instanceof' expression must be of type 'any' or of a type assignable to the 'Function' interface type." },
+        The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol: { code: 2360, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol_2360", message: "The left-hand side of an 'in' expression must be of type 'any', 'string', 'number', or 'symbol'." },
+        The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter: { code: 2361, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter_2361", message: "The right-hand side of an 'in' expression must be of type 'any', an object type or a type parameter." },
+        The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type: { code: 2362, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type_2362", message: "The left-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type." },
+        The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type: { code: 2363, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type_2363", message: "The right-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type." },
+        The_left_hand_side_of_an_assignment_expression_must_be_a_variable_or_a_property_access: { code: 2364, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_an_assignment_expression_must_be_a_variable_or_a_property_access_2364", message: "The left-hand side of an assignment expression must be a variable or a property access." },
+        Operator_0_cannot_be_applied_to_types_1_and_2: { code: 2365, category: ts.DiagnosticCategory.Error, key: "Operator_0_cannot_be_applied_to_types_1_and_2_2365", message: "Operator '{0}' cannot be applied to types '{1}' and '{2}'." },
+        Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined: { code: 2366, category: ts.DiagnosticCategory.Error, key: "Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined_2366", message: "Function lacks ending return statement and return type does not include 'undefined'." },
+        Type_parameter_name_cannot_be_0: { code: 2368, category: ts.DiagnosticCategory.Error, key: "Type_parameter_name_cannot_be_0_2368", message: "Type parameter name cannot be '{0}'." },
+        A_parameter_property_is_only_allowed_in_a_constructor_implementation: { code: 2369, category: ts.DiagnosticCategory.Error, key: "A_parameter_property_is_only_allowed_in_a_constructor_implementation_2369", message: "A parameter property is only allowed in a constructor implementation." },
+        A_rest_parameter_must_be_of_an_array_type: { code: 2370, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_must_be_of_an_array_type_2370", message: "A rest parameter must be of an array type." },
+        A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation: { code: 2371, category: ts.DiagnosticCategory.Error, key: "A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation_2371", message: "A parameter initializer is only allowed in a function or constructor implementation." },
+        Parameter_0_cannot_be_referenced_in_its_initializer: { code: 2372, category: ts.DiagnosticCategory.Error, key: "Parameter_0_cannot_be_referenced_in_its_initializer_2372", message: "Parameter '{0}' cannot be referenced in its initializer." },
+        Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it: { code: 2373, category: ts.DiagnosticCategory.Error, key: "Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it_2373", message: "Initializer of parameter '{0}' cannot reference identifier '{1}' declared after it." },
+        Duplicate_string_index_signature: { code: 2374, category: ts.DiagnosticCategory.Error, key: "Duplicate_string_index_signature_2374", message: "Duplicate string index signature." },
+        Duplicate_number_index_signature: { code: 2375, category: ts.DiagnosticCategory.Error, key: "Duplicate_number_index_signature_2375", message: "Duplicate number index signature." },
+        A_super_call_must_be_the_first_statement_in_the_constructor_when_a_class_contains_initialized_properties_or_has_parameter_properties: { code: 2376, category: ts.DiagnosticCategory.Error, key: "A_super_call_must_be_the_first_statement_in_the_constructor_when_a_class_contains_initialized_proper_2376", message: "A 'super' call must be the first statement in the constructor when a class contains initialized properties or has parameter properties." },
+        Constructors_for_derived_classes_must_contain_a_super_call: { code: 2377, category: ts.DiagnosticCategory.Error, key: "Constructors_for_derived_classes_must_contain_a_super_call_2377", message: "Constructors for derived classes must contain a 'super' call." },
+        A_get_accessor_must_return_a_value: { code: 2378, category: ts.DiagnosticCategory.Error, key: "A_get_accessor_must_return_a_value_2378", message: "A 'get' accessor must return a value." },
+        Getter_and_setter_accessors_do_not_agree_in_visibility: { code: 2379, category: ts.DiagnosticCategory.Error, key: "Getter_and_setter_accessors_do_not_agree_in_visibility_2379", message: "Getter and setter accessors do not agree in visibility." },
+        get_and_set_accessor_must_have_the_same_type: { code: 2380, category: ts.DiagnosticCategory.Error, key: "get_and_set_accessor_must_have_the_same_type_2380", message: "'get' and 'set' accessor must have the same type." },
+        A_signature_with_an_implementation_cannot_use_a_string_literal_type: { code: 2381, category: ts.DiagnosticCategory.Error, key: "A_signature_with_an_implementation_cannot_use_a_string_literal_type_2381", message: "A signature with an implementation cannot use a string literal type." },
+        Specialized_overload_signature_is_not_assignable_to_any_non_specialized_signature: { code: 2382, category: ts.DiagnosticCategory.Error, key: "Specialized_overload_signature_is_not_assignable_to_any_non_specialized_signature_2382", message: "Specialized overload signature is not assignable to any non-specialized signature." },
+        Overload_signatures_must_all_be_exported_or_non_exported: { code: 2383, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_exported_or_non_exported_2383", message: "Overload signatures must all be exported or non-exported." },
+        Overload_signatures_must_all_be_ambient_or_non_ambient: { code: 2384, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_ambient_or_non_ambient_2384", message: "Overload signatures must all be ambient or non-ambient." },
+        Overload_signatures_must_all_be_public_private_or_protected: { code: 2385, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_public_private_or_protected_2385", message: "Overload signatures must all be public, private or protected." },
+        Overload_signatures_must_all_be_optional_or_required: { code: 2386, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_optional_or_required_2386", message: "Overload signatures must all be optional or required." },
+        Function_overload_must_be_static: { code: 2387, category: ts.DiagnosticCategory.Error, key: "Function_overload_must_be_static_2387", message: "Function overload must be static." },
+        Function_overload_must_not_be_static: { code: 2388, category: ts.DiagnosticCategory.Error, key: "Function_overload_must_not_be_static_2388", message: "Function overload must not be static." },
+        Function_implementation_name_must_be_0: { code: 2389, category: ts.DiagnosticCategory.Error, key: "Function_implementation_name_must_be_0_2389", message: "Function implementation name must be '{0}'." },
+        Constructor_implementation_is_missing: { code: 2390, category: ts.DiagnosticCategory.Error, key: "Constructor_implementation_is_missing_2390", message: "Constructor implementation is missing." },
+        Function_implementation_is_missing_or_not_immediately_following_the_declaration: { code: 2391, category: ts.DiagnosticCategory.Error, key: "Function_implementation_is_missing_or_not_immediately_following_the_declaration_2391", message: "Function implementation is missing or not immediately following the declaration." },
+        Multiple_constructor_implementations_are_not_allowed: { code: 2392, category: ts.DiagnosticCategory.Error, key: "Multiple_constructor_implementations_are_not_allowed_2392", message: "Multiple constructor implementations are not allowed." },
+        Duplicate_function_implementation: { code: 2393, category: ts.DiagnosticCategory.Error, key: "Duplicate_function_implementation_2393", message: "Duplicate function implementation." },
+        Overload_signature_is_not_compatible_with_function_implementation: { code: 2394, category: ts.DiagnosticCategory.Error, key: "Overload_signature_is_not_compatible_with_function_implementation_2394", message: "Overload signature is not compatible with function implementation." },
+        Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local: { code: 2395, category: ts.DiagnosticCategory.Error, key: "Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local_2395", message: "Individual declarations in merged declaration '{0}' must be all exported or all local." },
+        Duplicate_identifier_arguments_Compiler_uses_arguments_to_initialize_rest_parameters: { code: 2396, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_arguments_Compiler_uses_arguments_to_initialize_rest_parameters_2396", message: "Duplicate identifier 'arguments'. Compiler uses 'arguments' to initialize rest parameters." },
+        Declaration_name_conflicts_with_built_in_global_identifier_0: { code: 2397, category: ts.DiagnosticCategory.Error, key: "Declaration_name_conflicts_with_built_in_global_identifier_0_2397", message: "Declaration name conflicts with built-in global identifier '{0}'." },
+        Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference: { code: 2399, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference_2399", message: "Duplicate identifier '_this'. Compiler uses variable declaration '_this' to capture 'this' reference." },
+        Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference: { code: 2400, category: ts.DiagnosticCategory.Error, key: "Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference_2400", message: "Expression resolves to variable declaration '_this' that compiler uses to capture 'this' reference." },
+        Duplicate_identifier_super_Compiler_uses_super_to_capture_base_class_reference: { code: 2401, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_super_Compiler_uses_super_to_capture_base_class_reference_2401", message: "Duplicate identifier '_super'. Compiler uses '_super' to capture base class reference." },
+        Expression_resolves_to_super_that_compiler_uses_to_capture_base_class_reference: { code: 2402, category: ts.DiagnosticCategory.Error, key: "Expression_resolves_to_super_that_compiler_uses_to_capture_base_class_reference_2402", message: "Expression resolves to '_super' that compiler uses to capture base class reference." },
+        Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_type_2: { code: 2403, category: ts.DiagnosticCategory.Error, key: "Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_t_2403", message: "Subsequent variable declarations must have the same type.  Variable '{0}' must be of type '{1}', but here has type '{2}'." },
+        The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation: { code: 2404, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation_2404", message: "The left-hand side of a 'for...in' statement cannot use a type annotation." },
+        The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any: { code: 2405, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any_2405", message: "The left-hand side of a 'for...in' statement must be of type 'string' or 'any'." },
+        The_left_hand_side_of_a_for_in_statement_must_be_a_variable_or_a_property_access: { code: 2406, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_must_be_a_variable_or_a_property_access_2406", message: "The left-hand side of a 'for...in' statement must be a variable or a property access." },
+        The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter: { code: 2407, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter_2407", message: "The right-hand side of a 'for...in' statement must be of type 'any', an object type or a type parameter." },
+        Setters_cannot_return_a_value: { code: 2408, category: ts.DiagnosticCategory.Error, key: "Setters_cannot_return_a_value_2408", message: "Setters cannot return a value." },
+        Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class: { code: 2409, category: ts.DiagnosticCategory.Error, key: "Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class_2409", message: "Return type of constructor signature must be assignable to the instance type of the class." },
+        The_with_statement_is_not_supported_All_symbols_in_a_with_block_will_have_type_any: { code: 2410, category: ts.DiagnosticCategory.Error, key: "The_with_statement_is_not_supported_All_symbols_in_a_with_block_will_have_type_any_2410", message: "The 'with' statement is not supported. All symbols in a 'with' block will have type 'any'." },
+        Property_0_of_type_1_is_not_assignable_to_string_index_type_2: { code: 2411, category: ts.DiagnosticCategory.Error, key: "Property_0_of_type_1_is_not_assignable_to_string_index_type_2_2411", message: "Property '{0}' of type '{1}' is not assignable to string index type '{2}'." },
+        Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2: { code: 2412, category: ts.DiagnosticCategory.Error, key: "Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2_2412", message: "Property '{0}' of type '{1}' is not assignable to numeric index type '{2}'." },
+        Numeric_index_type_0_is_not_assignable_to_string_index_type_1: { code: 2413, category: ts.DiagnosticCategory.Error, key: "Numeric_index_type_0_is_not_assignable_to_string_index_type_1_2413", message: "Numeric index type '{0}' is not assignable to string index type '{1}'." },
+        Class_name_cannot_be_0: { code: 2414, category: ts.DiagnosticCategory.Error, key: "Class_name_cannot_be_0_2414", message: "Class name cannot be '{0}'." },
+        Class_0_incorrectly_extends_base_class_1: { code: 2415, category: ts.DiagnosticCategory.Error, key: "Class_0_incorrectly_extends_base_class_1_2415", message: "Class '{0}' incorrectly extends base class '{1}'." },
+        Class_static_side_0_incorrectly_extends_base_class_static_side_1: { code: 2417, category: ts.DiagnosticCategory.Error, key: "Class_static_side_0_incorrectly_extends_base_class_static_side_1_2417", message: "Class static side '{0}' incorrectly extends base class static side '{1}'." },
+        Class_0_incorrectly_implements_interface_1: { code: 2420, category: ts.DiagnosticCategory.Error, key: "Class_0_incorrectly_implements_interface_1_2420", message: "Class '{0}' incorrectly implements interface '{1}'." },
+        A_class_may_only_implement_another_class_or_interface: { code: 2422, category: ts.DiagnosticCategory.Error, key: "A_class_may_only_implement_another_class_or_interface_2422", message: "A class may only implement another class or interface." },
+        Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_accessor: { code: 2423, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_access_2423", message: "Class '{0}' defines instance member function '{1}', but extended class '{2}' defines it as instance member accessor." },
+        Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_property: { code: 2424, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_proper_2424", message: "Class '{0}' defines instance member function '{1}', but extended class '{2}' defines it as instance member property." },
+        Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_function: { code: 2425, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_functi_2425", message: "Class '{0}' defines instance member property '{1}', but extended class '{2}' defines it as instance member function." },
+        Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_function: { code: 2426, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_functi_2426", message: "Class '{0}' defines instance member accessor '{1}', but extended class '{2}' defines it as instance member function." },
+        Interface_name_cannot_be_0: { code: 2427, category: ts.DiagnosticCategory.Error, key: "Interface_name_cannot_be_0_2427", message: "Interface name cannot be '{0}'." },
+        All_declarations_of_0_must_have_identical_type_parameters: { code: 2428, category: ts.DiagnosticCategory.Error, key: "All_declarations_of_0_must_have_identical_type_parameters_2428", message: "All declarations of '{0}' must have identical type parameters." },
+        Interface_0_incorrectly_extends_interface_1: { code: 2430, category: ts.DiagnosticCategory.Error, key: "Interface_0_incorrectly_extends_interface_1_2430", message: "Interface '{0}' incorrectly extends interface '{1}'." },
+        Enum_name_cannot_be_0: { code: 2431, category: ts.DiagnosticCategory.Error, key: "Enum_name_cannot_be_0_2431", message: "Enum name cannot be '{0}'." },
+        In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enum_element: { code: 2432, category: ts.DiagnosticCategory.Error, key: "In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enu_2432", message: "In an enum with multiple declarations, only one declaration can omit an initializer for its first enum element." },
+        A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merged: { code: 2433, category: ts.DiagnosticCategory.Error, key: "A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merg_2433", message: "A namespace declaration cannot be in a different file from a class or function with which it is merged." },
+        A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged: { code: 2434, category: ts.DiagnosticCategory.Error, key: "A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged_2434", message: "A namespace declaration cannot be located prior to a class or function with which it is merged." },
+        Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces: { code: 2435, category: ts.DiagnosticCategory.Error, key: "Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces_2435", message: "Ambient modules cannot be nested in other modules or namespaces." },
+        Ambient_module_declaration_cannot_specify_relative_module_name: { code: 2436, category: ts.DiagnosticCategory.Error, key: "Ambient_module_declaration_cannot_specify_relative_module_name_2436", message: "Ambient module declaration cannot specify relative module name." },
+        Module_0_is_hidden_by_a_local_declaration_with_the_same_name: { code: 2437, category: ts.DiagnosticCategory.Error, key: "Module_0_is_hidden_by_a_local_declaration_with_the_same_name_2437", message: "Module '{0}' is hidden by a local declaration with the same name." },
+        Import_name_cannot_be_0: { code: 2438, category: ts.DiagnosticCategory.Error, key: "Import_name_cannot_be_0_2438", message: "Import name cannot be '{0}'." },
+        Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relative_module_name: { code: 2439, category: ts.DiagnosticCategory.Error, key: "Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relati_2439", message: "Import or export declaration in an ambient module declaration cannot reference module through relative module name." },
+        Import_declaration_conflicts_with_local_declaration_of_0: { code: 2440, category: ts.DiagnosticCategory.Error, key: "Import_declaration_conflicts_with_local_declaration_of_0_2440", message: "Import declaration conflicts with local declaration of '{0}'." },
+        Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module: { code: 2441, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_2441", message: "Duplicate identifier '{0}'. Compiler reserves name '{1}' in top level scope of a module." },
+        Types_have_separate_declarations_of_a_private_property_0: { code: 2442, category: ts.DiagnosticCategory.Error, key: "Types_have_separate_declarations_of_a_private_property_0_2442", message: "Types have separate declarations of a private property '{0}'." },
+        Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2: { code: 2443, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2_2443", message: "Property '{0}' is protected but type '{1}' is not a class derived from '{2}'." },
+        Property_0_is_protected_in_type_1_but_public_in_type_2: { code: 2444, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_in_type_1_but_public_in_type_2_2444", message: "Property '{0}' is protected in type '{1}' but public in type '{2}'." },
+        Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses: { code: 2445, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses_2445", message: "Property '{0}' is protected and only accessible within class '{1}' and its subclasses." },
+        Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1: { code: 2446, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1_2446", message: "Property '{0}' is protected and only accessible through an instance of class '{1}'." },
+        The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead: { code: 2447, category: ts.DiagnosticCategory.Error, key: "The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead_2447", message: "The '{0}' operator is not allowed for boolean types. Consider using '{1}' instead." },
+        Block_scoped_variable_0_used_before_its_declaration: { code: 2448, category: ts.DiagnosticCategory.Error, key: "Block_scoped_variable_0_used_before_its_declaration_2448", message: "Block-scoped variable '{0}' used before its declaration." },
+        Class_0_used_before_its_declaration: { code: 2449, category: ts.DiagnosticCategory.Error, key: "Class_0_used_before_its_declaration_2449", message: "Class '{0}' used before its declaration." },
+        Enum_0_used_before_its_declaration: { code: 2450, category: ts.DiagnosticCategory.Error, key: "Enum_0_used_before_its_declaration_2450", message: "Enum '{0}' used before its declaration." },
+        Cannot_redeclare_block_scoped_variable_0: { code: 2451, category: ts.DiagnosticCategory.Error, key: "Cannot_redeclare_block_scoped_variable_0_2451", message: "Cannot redeclare block-scoped variable '{0}'." },
+        An_enum_member_cannot_have_a_numeric_name: { code: 2452, category: ts.DiagnosticCategory.Error, key: "An_enum_member_cannot_have_a_numeric_name_2452", message: "An enum member cannot have a numeric name." },
+        The_type_argument_for_type_parameter_0_cannot_be_inferred_from_the_usage_Consider_specifying_the_type_arguments_explicitly: { code: 2453, category: ts.DiagnosticCategory.Error, key: "The_type_argument_for_type_parameter_0_cannot_be_inferred_from_the_usage_Consider_specifying_the_typ_2453", message: "The type argument for type parameter '{0}' cannot be inferred from the usage. Consider specifying the type arguments explicitly." },
+        Variable_0_is_used_before_being_assigned: { code: 2454, category: ts.DiagnosticCategory.Error, key: "Variable_0_is_used_before_being_assigned_2454", message: "Variable '{0}' is used before being assigned." },
+        Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0: { code: 2455, category: ts.DiagnosticCategory.Error, key: "Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0_2455", message: "Type argument candidate '{1}' is not a valid type argument because it is not a supertype of candidate '{0}'." },
+        Type_alias_0_circularly_references_itself: { code: 2456, category: ts.DiagnosticCategory.Error, key: "Type_alias_0_circularly_references_itself_2456", message: "Type alias '{0}' circularly references itself." },
+        Type_alias_name_cannot_be_0: { code: 2457, category: ts.DiagnosticCategory.Error, key: "Type_alias_name_cannot_be_0_2457", message: "Type alias name cannot be '{0}'." },
+        An_AMD_module_cannot_have_multiple_name_assignments: { code: 2458, category: ts.DiagnosticCategory.Error, key: "An_AMD_module_cannot_have_multiple_name_assignments_2458", message: "An AMD module cannot have multiple name assignments." },
+        Type_0_has_no_property_1_and_no_string_index_signature: { code: 2459, category: ts.DiagnosticCategory.Error, key: "Type_0_has_no_property_1_and_no_string_index_signature_2459", message: "Type '{0}' has no property '{1}' and no string index signature." },
+        Type_0_has_no_property_1: { code: 2460, category: ts.DiagnosticCategory.Error, key: "Type_0_has_no_property_1_2460", message: "Type '{0}' has no property '{1}'." },
+        Type_0_is_not_an_array_type: { code: 2461, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_an_array_type_2461", message: "Type '{0}' is not an array type." },
+        A_rest_element_must_be_last_in_a_destructuring_pattern: { code: 2462, category: ts.DiagnosticCategory.Error, key: "A_rest_element_must_be_last_in_a_destructuring_pattern_2462", message: "A rest element must be last in a destructuring pattern." },
+        A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature: { code: 2463, category: ts.DiagnosticCategory.Error, key: "A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature_2463", message: "A binding pattern parameter cannot be optional in an implementation signature." },
+        A_computed_property_name_must_be_of_type_string_number_symbol_or_any: { code: 2464, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_must_be_of_type_string_number_symbol_or_any_2464", message: "A computed property name must be of type 'string', 'number', 'symbol', or 'any'." },
+        this_cannot_be_referenced_in_a_computed_property_name: { code: 2465, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_a_computed_property_name_2465", message: "'this' cannot be referenced in a computed property name." },
+        super_cannot_be_referenced_in_a_computed_property_name: { code: 2466, category: ts.DiagnosticCategory.Error, key: "super_cannot_be_referenced_in_a_computed_property_name_2466", message: "'super' cannot be referenced in a computed property name." },
+        A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type: { code: 2467, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type_2467", message: "A computed property name cannot reference a type parameter from its containing type." },
+        Cannot_find_global_value_0: { code: 2468, category: ts.DiagnosticCategory.Error, key: "Cannot_find_global_value_0_2468", message: "Cannot find global value '{0}'." },
+        The_0_operator_cannot_be_applied_to_type_symbol: { code: 2469, category: ts.DiagnosticCategory.Error, key: "The_0_operator_cannot_be_applied_to_type_symbol_2469", message: "The '{0}' operator cannot be applied to type 'symbol'." },
+        Symbol_reference_does_not_refer_to_the_global_Symbol_constructor_object: { code: 2470, category: ts.DiagnosticCategory.Error, key: "Symbol_reference_does_not_refer_to_the_global_Symbol_constructor_object_2470", message: "'Symbol' reference does not refer to the global Symbol constructor object." },
+        A_computed_property_name_of_the_form_0_must_be_of_type_symbol: { code: 2471, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_of_the_form_0_must_be_of_type_symbol_2471", message: "A computed property name of the form '{0}' must be of type 'symbol'." },
+        Spread_operator_in_new_expressions_is_only_available_when_targeting_ECMAScript_5_and_higher: { code: 2472, category: ts.DiagnosticCategory.Error, key: "Spread_operator_in_new_expressions_is_only_available_when_targeting_ECMAScript_5_and_higher_2472", message: "Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher." },
+        Enum_declarations_must_all_be_const_or_non_const: { code: 2473, category: ts.DiagnosticCategory.Error, key: "Enum_declarations_must_all_be_const_or_non_const_2473", message: "Enum declarations must all be const or non-const." },
+        In_const_enum_declarations_member_initializer_must_be_constant_expression: { code: 2474, category: ts.DiagnosticCategory.Error, key: "In_const_enum_declarations_member_initializer_must_be_constant_expression_2474", message: "In 'const' enum declarations member initializer must be constant expression." },
+        const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_import_declaration_or_export_assignment: { code: 2475, category: ts.DiagnosticCategory.Error, key: "const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_im_2475", message: "'const' enums can only be used in property or index access expressions or the right hand side of an import declaration or export assignment." },
+        A_const_enum_member_can_only_be_accessed_using_a_string_literal: { code: 2476, category: ts.DiagnosticCategory.Error, key: "A_const_enum_member_can_only_be_accessed_using_a_string_literal_2476", message: "A const enum member can only be accessed using a string literal." },
+        const_enum_member_initializer_was_evaluated_to_a_non_finite_value: { code: 2477, category: ts.DiagnosticCategory.Error, key: "const_enum_member_initializer_was_evaluated_to_a_non_finite_value_2477", message: "'const' enum member initializer was evaluated to a non-finite value." },
+        const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN: { code: 2478, category: ts.DiagnosticCategory.Error, key: "const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN_2478", message: "'const' enum member initializer was evaluated to disallowed value 'NaN'." },
+        Property_0_does_not_exist_on_const_enum_1: { code: 2479, category: ts.DiagnosticCategory.Error, key: "Property_0_does_not_exist_on_const_enum_1_2479", message: "Property '{0}' does not exist on 'const' enum '{1}'." },
+        let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations: { code: 2480, category: ts.DiagnosticCategory.Error, key: "let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations_2480", message: "'let' is not allowed to be used as a name in 'let' or 'const' declarations." },
+        Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1: { code: 2481, category: ts.DiagnosticCategory.Error, key: "Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1_2481", message: "Cannot initialize outer scoped variable '{0}' in the same scope as block scoped declaration '{1}'." },
+        The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation: { code: 2483, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation_2483", message: "The left-hand side of a 'for...of' statement cannot use a type annotation." },
+        Export_declaration_conflicts_with_exported_declaration_of_0: { code: 2484, category: ts.DiagnosticCategory.Error, key: "Export_declaration_conflicts_with_exported_declaration_of_0_2484", message: "Export declaration conflicts with exported declaration of '{0}'." },
+        The_left_hand_side_of_a_for_of_statement_must_be_a_variable_or_a_property_access: { code: 2487, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_of_statement_must_be_a_variable_or_a_property_access_2487", message: "The left-hand side of a 'for...of' statement must be a variable or a property access." },
+        Type_must_have_a_Symbol_iterator_method_that_returns_an_iterator: { code: 2488, category: ts.DiagnosticCategory.Error, key: "Type_must_have_a_Symbol_iterator_method_that_returns_an_iterator_2488", message: "Type must have a '[Symbol.iterator]()' method that returns an iterator." },
+        An_iterator_must_have_a_next_method: { code: 2489, category: ts.DiagnosticCategory.Error, key: "An_iterator_must_have_a_next_method_2489", message: "An iterator must have a 'next()' method." },
+        The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property: { code: 2490, category: ts.DiagnosticCategory.Error, key: "The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property_2490", message: "The type returned by the 'next()' method of an iterator must have a 'value' property." },
+        The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern: { code: 2491, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern_2491", message: "The left-hand side of a 'for...in' statement cannot be a destructuring pattern." },
+        Cannot_redeclare_identifier_0_in_catch_clause: { code: 2492, category: ts.DiagnosticCategory.Error, key: "Cannot_redeclare_identifier_0_in_catch_clause_2492", message: "Cannot redeclare identifier '{0}' in catch clause." },
+        Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2: { code: 2493, category: ts.DiagnosticCategory.Error, key: "Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2_2493", message: "Tuple type '{0}' with length '{1}' cannot be assigned to tuple with length '{2}'." },
+        Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher: { code: 2494, category: ts.DiagnosticCategory.Error, key: "Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher_2494", message: "Using a string in a 'for...of' statement is only supported in ECMAScript 5 and higher." },
+        Type_0_is_not_an_array_type_or_a_string_type: { code: 2495, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_an_array_type_or_a_string_type_2495", message: "Type '{0}' is not an array type or a string type." },
+        The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_standard_function_expression: { code: 2496, category: ts.DiagnosticCategory.Error, key: "The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_stand_2496", message: "The 'arguments' object cannot be referenced in an arrow function in ES3 and ES5. Consider using a standard function expression." },
+        Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct: { code: 2497, category: ts.DiagnosticCategory.Error, key: "Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct_2497", message: "Module '{0}' resolves to a non-module entity and cannot be imported using this construct." },
+        Module_0_uses_export_and_cannot_be_used_with_export_Asterisk: { code: 2498, category: ts.DiagnosticCategory.Error, key: "Module_0_uses_export_and_cannot_be_used_with_export_Asterisk_2498", message: "Module '{0}' uses 'export =' and cannot be used with 'export *'." },
+        An_interface_can_only_extend_an_identifier_Slashqualified_name_with_optional_type_arguments: { code: 2499, category: ts.DiagnosticCategory.Error, key: "An_interface_can_only_extend_an_identifier_Slashqualified_name_with_optional_type_arguments_2499", message: "An interface can only extend an identifier/qualified-name with optional type arguments." },
+        A_class_can_only_implement_an_identifier_Slashqualified_name_with_optional_type_arguments: { code: 2500, category: ts.DiagnosticCategory.Error, key: "A_class_can_only_implement_an_identifier_Slashqualified_name_with_optional_type_arguments_2500", message: "A class can only implement an identifier/qualified-name with optional type arguments." },
+        A_rest_element_cannot_contain_a_binding_pattern: { code: 2501, category: ts.DiagnosticCategory.Error, key: "A_rest_element_cannot_contain_a_binding_pattern_2501", message: "A rest element cannot contain a binding pattern." },
+        _0_is_referenced_directly_or_indirectly_in_its_own_type_annotation: { code: 2502, category: ts.DiagnosticCategory.Error, key: "_0_is_referenced_directly_or_indirectly_in_its_own_type_annotation_2502", message: "'{0}' is referenced directly or indirectly in its own type annotation." },
+        Cannot_find_namespace_0: { code: 2503, category: ts.DiagnosticCategory.Error, key: "Cannot_find_namespace_0_2503", message: "Cannot find namespace '{0}'." },
+        Type_must_have_a_Symbol_asyncIterator_method_that_returns_an_async_iterator: { code: 2504, category: ts.DiagnosticCategory.Error, key: "Type_must_have_a_Symbol_asyncIterator_method_that_returns_an_async_iterator_2504", message: "Type must have a '[Symbol.asyncIterator]()' method that returns an async iterator." },
+        A_generator_cannot_have_a_void_type_annotation: { code: 2505, category: ts.DiagnosticCategory.Error, key: "A_generator_cannot_have_a_void_type_annotation_2505", message: "A generator cannot have a 'void' type annotation." },
+        _0_is_referenced_directly_or_indirectly_in_its_own_base_expression: { code: 2506, category: ts.DiagnosticCategory.Error, key: "_0_is_referenced_directly_or_indirectly_in_its_own_base_expression_2506", message: "'{0}' is referenced directly or indirectly in its own base expression." },
+        Type_0_is_not_a_constructor_function_type: { code: 2507, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_a_constructor_function_type_2507", message: "Type '{0}' is not a constructor function type." },
+        No_base_constructor_has_the_specified_number_of_type_arguments: { code: 2508, category: ts.DiagnosticCategory.Error, key: "No_base_constructor_has_the_specified_number_of_type_arguments_2508", message: "No base constructor has the specified number of type arguments." },
+        Base_constructor_return_type_0_is_not_a_class_or_interface_type: { code: 2509, category: ts.DiagnosticCategory.Error, key: "Base_constructor_return_type_0_is_not_a_class_or_interface_type_2509", message: "Base constructor return type '{0}' is not a class or interface type." },
+        Base_constructors_must_all_have_the_same_return_type: { code: 2510, category: ts.DiagnosticCategory.Error, key: "Base_constructors_must_all_have_the_same_return_type_2510", message: "Base constructors must all have the same return type." },
+        Cannot_create_an_instance_of_the_abstract_class_0: { code: 2511, category: ts.DiagnosticCategory.Error, key: "Cannot_create_an_instance_of_the_abstract_class_0_2511", message: "Cannot create an instance of the abstract class '{0}'." },
+        Overload_signatures_must_all_be_abstract_or_non_abstract: { code: 2512, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_abstract_or_non_abstract_2512", message: "Overload signatures must all be abstract or non-abstract." },
+        Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression: { code: 2513, category: ts.DiagnosticCategory.Error, key: "Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression_2513", message: "Abstract method '{0}' in class '{1}' cannot be accessed via super expression." },
+        Classes_containing_abstract_methods_must_be_marked_abstract: { code: 2514, category: ts.DiagnosticCategory.Error, key: "Classes_containing_abstract_methods_must_be_marked_abstract_2514", message: "Classes containing abstract methods must be marked abstract." },
+        Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2: { code: 2515, category: ts.DiagnosticCategory.Error, key: "Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2_2515", message: "Non-abstract class '{0}' does not implement inherited abstract member '{1}' from class '{2}'." },
+        All_declarations_of_an_abstract_method_must_be_consecutive: { code: 2516, category: ts.DiagnosticCategory.Error, key: "All_declarations_of_an_abstract_method_must_be_consecutive_2516", message: "All declarations of an abstract method must be consecutive." },
+        Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type: { code: 2517, category: ts.DiagnosticCategory.Error, key: "Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type_2517", message: "Cannot assign an abstract constructor type to a non-abstract constructor type." },
+        A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard: { code: 2518, category: ts.DiagnosticCategory.Error, key: "A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard_2518", message: "A 'this'-based type guard is not compatible with a parameter-based type guard." },
+        An_async_iterator_must_have_a_next_method: { code: 2519, category: ts.DiagnosticCategory.Error, key: "An_async_iterator_must_have_a_next_method_2519", message: "An async iterator must have a 'next()' method." },
+        Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions: { code: 2520, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions_2520", message: "Duplicate identifier '{0}'. Compiler uses declaration '{1}' to support async functions." },
+        Expression_resolves_to_variable_declaration_0_that_compiler_uses_to_support_async_functions: { code: 2521, category: ts.DiagnosticCategory.Error, key: "Expression_resolves_to_variable_declaration_0_that_compiler_uses_to_support_async_functions_2521", message: "Expression resolves to variable declaration '{0}' that compiler uses to support async functions." },
+        The_arguments_object_cannot_be_referenced_in_an_async_function_or_method_in_ES3_and_ES5_Consider_using_a_standard_function_or_method: { code: 2522, category: ts.DiagnosticCategory.Error, key: "The_arguments_object_cannot_be_referenced_in_an_async_function_or_method_in_ES3_and_ES5_Consider_usi_2522", message: "The 'arguments' object cannot be referenced in an async function or method in ES3 and ES5. Consider using a standard function or method." },
+        yield_expressions_cannot_be_used_in_a_parameter_initializer: { code: 2523, category: ts.DiagnosticCategory.Error, key: "yield_expressions_cannot_be_used_in_a_parameter_initializer_2523", message: "'yield' expressions cannot be used in a parameter initializer." },
+        await_expressions_cannot_be_used_in_a_parameter_initializer: { code: 2524, category: ts.DiagnosticCategory.Error, key: "await_expressions_cannot_be_used_in_a_parameter_initializer_2524", message: "'await' expressions cannot be used in a parameter initializer." },
+        Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value: { code: 2525, category: ts.DiagnosticCategory.Error, key: "Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value_2525", message: "Initializer provides no value for this binding element and the binding element has no default value." },
+        A_this_type_is_available_only_in_a_non_static_member_of_a_class_or_interface: { code: 2526, category: ts.DiagnosticCategory.Error, key: "A_this_type_is_available_only_in_a_non_static_member_of_a_class_or_interface_2526", message: "A 'this' type is available only in a non-static member of a class or interface." },
+        The_inferred_type_of_0_references_an_inaccessible_this_type_A_type_annotation_is_necessary: { code: 2527, category: ts.DiagnosticCategory.Error, key: "The_inferred_type_of_0_references_an_inaccessible_this_type_A_type_annotation_is_necessary_2527", message: "The inferred type of '{0}' references an inaccessible 'this' type. A type annotation is necessary." },
+        A_module_cannot_have_multiple_default_exports: { code: 2528, category: ts.DiagnosticCategory.Error, key: "A_module_cannot_have_multiple_default_exports_2528", message: "A module cannot have multiple default exports." },
+        Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_containing_async_functions: { code: 2529, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_containing_async_func_2529", message: "Duplicate identifier '{0}'. Compiler reserves name '{1}' in top level scope of a module containing async functions." },
+        Property_0_is_incompatible_with_index_signature: { code: 2530, category: ts.DiagnosticCategory.Error, key: "Property_0_is_incompatible_with_index_signature_2530", message: "Property '{0}' is incompatible with index signature." },
+        Object_is_possibly_null: { code: 2531, category: ts.DiagnosticCategory.Error, key: "Object_is_possibly_null_2531", message: "Object is possibly 'null'." },
+        Object_is_possibly_undefined: { code: 2532, category: ts.DiagnosticCategory.Error, key: "Object_is_possibly_undefined_2532", message: "Object is possibly 'undefined'." },
+        Object_is_possibly_null_or_undefined: { code: 2533, category: ts.DiagnosticCategory.Error, key: "Object_is_possibly_null_or_undefined_2533", message: "Object is possibly 'null' or 'undefined'." },
+        A_function_returning_never_cannot_have_a_reachable_end_point: { code: 2534, category: ts.DiagnosticCategory.Error, key: "A_function_returning_never_cannot_have_a_reachable_end_point_2534", message: "A function returning 'never' cannot have a reachable end point." },
+        Enum_type_0_has_members_with_initializers_that_are_not_literals: { code: 2535, category: ts.DiagnosticCategory.Error, key: "Enum_type_0_has_members_with_initializers_that_are_not_literals_2535", message: "Enum type '{0}' has members with initializers that are not literals." },
+        Type_0_cannot_be_used_to_index_type_1: { code: 2536, category: ts.DiagnosticCategory.Error, key: "Type_0_cannot_be_used_to_index_type_1_2536", message: "Type '{0}' cannot be used to index type '{1}'." },
+        Type_0_has_no_matching_index_signature_for_type_1: { code: 2537, category: ts.DiagnosticCategory.Error, key: "Type_0_has_no_matching_index_signature_for_type_1_2537", message: "Type '{0}' has no matching index signature for type '{1}'." },
+        Type_0_cannot_be_used_as_an_index_type: { code: 2538, category: ts.DiagnosticCategory.Error, key: "Type_0_cannot_be_used_as_an_index_type_2538", message: "Type '{0}' cannot be used as an index type." },
+        Cannot_assign_to_0_because_it_is_not_a_variable: { code: 2539, category: ts.DiagnosticCategory.Error, key: "Cannot_assign_to_0_because_it_is_not_a_variable_2539", message: "Cannot assign to '{0}' because it is not a variable." },
+        Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property: { code: 2540, category: ts.DiagnosticCategory.Error, key: "Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property_2540", message: "Cannot assign to '{0}' because it is a constant or a read-only property." },
+        The_target_of_an_assignment_must_be_a_variable_or_a_property_access: { code: 2541, category: ts.DiagnosticCategory.Error, key: "The_target_of_an_assignment_must_be_a_variable_or_a_property_access_2541", message: "The target of an assignment must be a variable or a property access." },
+        Index_signature_in_type_0_only_permits_reading: { code: 2542, category: ts.DiagnosticCategory.Error, key: "Index_signature_in_type_0_only_permits_reading_2542", message: "Index signature in type '{0}' only permits reading." },
+        Duplicate_identifier_newTarget_Compiler_uses_variable_declaration_newTarget_to_capture_new_target_meta_property_reference: { code: 2543, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_newTarget_Compiler_uses_variable_declaration_newTarget_to_capture_new_target_me_2543", message: "Duplicate identifier '_newTarget'. Compiler uses variable declaration '_newTarget' to capture 'new.target' meta-property reference." },
+        Expression_resolves_to_variable_declaration_newTarget_that_compiler_uses_to_capture_new_target_meta_property_reference: { code: 2544, category: ts.DiagnosticCategory.Error, key: "Expression_resolves_to_variable_declaration_newTarget_that_compiler_uses_to_capture_new_target_meta__2544", message: "Expression resolves to variable declaration '_newTarget' that compiler uses to capture 'new.target' meta-property reference." },
+        A_mixin_class_must_have_a_constructor_with_a_single_rest_parameter_of_type_any: { code: 2545, category: ts.DiagnosticCategory.Error, key: "A_mixin_class_must_have_a_constructor_with_a_single_rest_parameter_of_type_any_2545", message: "A mixin class must have a constructor with a single rest parameter of type 'any[]'." },
+        Property_0_has_conflicting_declarations_and_is_inaccessible_in_type_1: { code: 2546, category: ts.DiagnosticCategory.Error, key: "Property_0_has_conflicting_declarations_and_is_inaccessible_in_type_1_2546", message: "Property '{0}' has conflicting declarations and is inaccessible in type '{1}'." },
+        The_type_returned_by_the_next_method_of_an_async_iterator_must_be_a_promise_for_a_type_with_a_value_property: { code: 2547, category: ts.DiagnosticCategory.Error, key: "The_type_returned_by_the_next_method_of_an_async_iterator_must_be_a_promise_for_a_type_with_a_value__2547", message: "The type returned by the 'next()' method of an async iterator must be a promise for a type with a 'value' property." },
+        Type_0_is_not_an_array_type_or_does_not_have_a_Symbol_iterator_method_that_returns_an_iterator: { code: 2548, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_an_array_type_or_does_not_have_a_Symbol_iterator_method_that_returns_an_iterator_2548", message: "Type '{0}' is not an array type or does not have a '[Symbol.iterator]()' method that returns an iterator." },
+        Type_0_is_not_an_array_type_or_a_string_type_or_does_not_have_a_Symbol_iterator_method_that_returns_an_iterator: { code: 2549, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_an_array_type_or_a_string_type_or_does_not_have_a_Symbol_iterator_method_that_returns__2549", message: "Type '{0}' is not an array type or a string type or does not have a '[Symbol.iterator]()' method that returns an iterator." },
+        Generic_type_instantiation_is_excessively_deep_and_possibly_infinite: { code: 2550, category: ts.DiagnosticCategory.Error, key: "Generic_type_instantiation_is_excessively_deep_and_possibly_infinite_2550", message: "Generic type instantiation is excessively deep and possibly infinite." },
+        Property_0_does_not_exist_on_type_1_Did_you_mean_2: { code: 2551, category: ts.DiagnosticCategory.Error, key: "Property_0_does_not_exist_on_type_1_Did_you_mean_2_2551", message: "Property '{0}' does not exist on type '{1}'. Did you mean '{2}'?" },
+        Cannot_find_name_0_Did_you_mean_1: { code: 2552, category: ts.DiagnosticCategory.Error, key: "Cannot_find_name_0_Did_you_mean_1_2552", message: "Cannot find name '{0}'. Did you mean '{1}'?" },
+        Computed_values_are_not_permitted_in_an_enum_with_string_valued_members: { code: 2553, category: ts.DiagnosticCategory.Error, key: "Computed_values_are_not_permitted_in_an_enum_with_string_valued_members_2553", message: "Computed values are not permitted in an enum with string valued members." },
+        Expected_0_arguments_but_got_1: { code: 2554, category: ts.DiagnosticCategory.Error, key: "Expected_0_arguments_but_got_1_2554", message: "Expected {0} arguments, but got {1}." },
+        Expected_at_least_0_arguments_but_got_1: { code: 2555, category: ts.DiagnosticCategory.Error, key: "Expected_at_least_0_arguments_but_got_1_2555", message: "Expected at least {0} arguments, but got {1}." },
+        Expected_0_arguments_but_got_a_minimum_of_1: { code: 2556, category: ts.DiagnosticCategory.Error, key: "Expected_0_arguments_but_got_a_minimum_of_1_2556", message: "Expected {0} arguments, but got a minimum of {1}." },
+        Expected_at_least_0_arguments_but_got_a_minimum_of_1: { code: 2557, category: ts.DiagnosticCategory.Error, key: "Expected_at_least_0_arguments_but_got_a_minimum_of_1_2557", message: "Expected at least {0} arguments, but got a minimum of {1}." },
+        Expected_0_type_arguments_but_got_1: { code: 2558, category: ts.DiagnosticCategory.Error, key: "Expected_0_type_arguments_but_got_1_2558", message: "Expected {0} type arguments, but got {1}." },
+        Type_0_has_no_properties_in_common_with_type_1: { code: 2559, category: ts.DiagnosticCategory.Error, key: "Type_0_has_no_properties_in_common_with_type_1_2559", message: "Type '{0}' has no properties in common with type '{1}'." },
+        JSX_element_attributes_type_0_may_not_be_a_union_type: { code: 2600, category: ts.DiagnosticCategory.Error, key: "JSX_element_attributes_type_0_may_not_be_a_union_type_2600", message: "JSX element attributes type '{0}' may not be a union type." },
+        The_return_type_of_a_JSX_element_constructor_must_return_an_object_type: { code: 2601, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_a_JSX_element_constructor_must_return_an_object_type_2601", message: "The return type of a JSX element constructor must return an object type." },
+        JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist: { code: 2602, category: ts.DiagnosticCategory.Error, key: "JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist_2602", message: "JSX element implicitly has type 'any' because the global type 'JSX.Element' does not exist." },
+        Property_0_in_type_1_is_not_assignable_to_type_2: { code: 2603, category: ts.DiagnosticCategory.Error, key: "Property_0_in_type_1_is_not_assignable_to_type_2_2603", message: "Property '{0}' in type '{1}' is not assignable to type '{2}'." },
+        JSX_element_type_0_does_not_have_any_construct_or_call_signatures: { code: 2604, category: ts.DiagnosticCategory.Error, key: "JSX_element_type_0_does_not_have_any_construct_or_call_signatures_2604", message: "JSX element type '{0}' does not have any construct or call signatures." },
+        JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements: { code: 2605, category: ts.DiagnosticCategory.Error, key: "JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements_2605", message: "JSX element type '{0}' is not a constructor function for JSX elements." },
+        Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property: { code: 2606, category: ts.DiagnosticCategory.Error, key: "Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property_2606", message: "Property '{0}' of JSX spread attribute is not assignable to target property." },
+        JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property: { code: 2607, category: ts.DiagnosticCategory.Error, key: "JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property_2607", message: "JSX element class does not support attributes because it does not have a '{0}' property." },
+        The_global_type_JSX_0_may_not_have_more_than_one_property: { code: 2608, category: ts.DiagnosticCategory.Error, key: "The_global_type_JSX_0_may_not_have_more_than_one_property_2608", message: "The global type 'JSX.{0}' may not have more than one property." },
+        JSX_spread_child_must_be_an_array_type: { code: 2609, category: ts.DiagnosticCategory.Error, key: "JSX_spread_child_must_be_an_array_type_2609", message: "JSX spread child must be an array type." },
+        Cannot_augment_module_0_with_value_exports_because_it_resolves_to_a_non_module_entity: { code: 2649, category: ts.DiagnosticCategory.Error, key: "Cannot_augment_module_0_with_value_exports_because_it_resolves_to_a_non_module_entity_2649", message: "Cannot augment module '{0}' with value exports because it resolves to a non-module entity." },
+        A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums: { code: 2651, category: ts.DiagnosticCategory.Error, key: "A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_memb_2651", message: "A member initializer in a enum declaration cannot reference members declared after it, including members defined in other enums." },
+        Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead: { code: 2652, category: ts.DiagnosticCategory.Error, key: "Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_d_2652", message: "Merged declaration '{0}' cannot include a default export declaration. Consider adding a separate 'export default {0}' declaration instead." },
+        Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1: { code: 2653, category: ts.DiagnosticCategory.Error, key: "Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1_2653", message: "Non-abstract class expression does not implement inherited abstract member '{0}' from class '{1}'." },
+        Exported_external_package_typings_file_cannot_contain_tripleslash_references_Please_contact_the_package_author_to_update_the_package_definition: { code: 2654, category: ts.DiagnosticCategory.Error, key: "Exported_external_package_typings_file_cannot_contain_tripleslash_references_Please_contact_the_pack_2654", message: "Exported external package typings file cannot contain tripleslash references. Please contact the package author to update the package definition." },
+        Exported_external_package_typings_file_0_is_not_a_module_Please_contact_the_package_author_to_update_the_package_definition: { code: 2656, category: ts.DiagnosticCategory.Error, key: "Exported_external_package_typings_file_0_is_not_a_module_Please_contact_the_package_author_to_update_2656", message: "Exported external package typings file '{0}' is not a module. Please contact the package author to update the package definition." },
+        JSX_expressions_must_have_one_parent_element: { code: 2657, category: ts.DiagnosticCategory.Error, key: "JSX_expressions_must_have_one_parent_element_2657", message: "JSX expressions must have one parent element." },
+        Type_0_provides_no_match_for_the_signature_1: { code: 2658, category: ts.DiagnosticCategory.Error, key: "Type_0_provides_no_match_for_the_signature_1_2658", message: "Type '{0}' provides no match for the signature '{1}'." },
+        super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_higher: { code: 2659, category: ts.DiagnosticCategory.Error, key: "super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_highe_2659", message: "'super' is only allowed in members of object literal expressions when option 'target' is 'ES2015' or higher." },
+        super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions: { code: 2660, category: ts.DiagnosticCategory.Error, key: "super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions_2660", message: "'super' can only be referenced in members of derived classes or object literal expressions." },
+        Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module: { code: 2661, category: ts.DiagnosticCategory.Error, key: "Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module_2661", message: "Cannot export '{0}'. Only local declarations can be exported from a module." },
+        Cannot_find_name_0_Did_you_mean_the_static_member_1_0: { code: 2662, category: ts.DiagnosticCategory.Error, key: "Cannot_find_name_0_Did_you_mean_the_static_member_1_0_2662", message: "Cannot find name '{0}'. Did you mean the static member '{1}.{0}'?" },
+        Cannot_find_name_0_Did_you_mean_the_instance_member_this_0: { code: 2663, category: ts.DiagnosticCategory.Error, key: "Cannot_find_name_0_Did_you_mean_the_instance_member_this_0_2663", message: "Cannot find name '{0}'. Did you mean the instance member 'this.{0}'?" },
+        Invalid_module_name_in_augmentation_module_0_cannot_be_found: { code: 2664, category: ts.DiagnosticCategory.Error, key: "Invalid_module_name_in_augmentation_module_0_cannot_be_found_2664", message: "Invalid module name in augmentation, module '{0}' cannot be found." },
+        Invalid_module_name_in_augmentation_Module_0_resolves_to_an_untyped_module_at_1_which_cannot_be_augmented: { code: 2665, category: ts.DiagnosticCategory.Error, key: "Invalid_module_name_in_augmentation_Module_0_resolves_to_an_untyped_module_at_1_which_cannot_be_augm_2665", message: "Invalid module name in augmentation. Module '{0}' resolves to an untyped module at '{1}', which cannot be augmented." },
+        Exports_and_export_assignments_are_not_permitted_in_module_augmentations: { code: 2666, category: ts.DiagnosticCategory.Error, key: "Exports_and_export_assignments_are_not_permitted_in_module_augmentations_2666", message: "Exports and export assignments are not permitted in module augmentations." },
+        Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_module: { code: 2667, category: ts.DiagnosticCategory.Error, key: "Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_mod_2667", message: "Imports are not permitted in module augmentations. Consider moving them to the enclosing external module." },
+        export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always_visible: { code: 2668, category: ts.DiagnosticCategory.Error, key: "export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always__2668", message: "'export' modifier cannot be applied to ambient modules and module augmentations since they are always visible." },
+        Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations: { code: 2669, category: ts.DiagnosticCategory.Error, key: "Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_2669", message: "Augmentations for the global scope can only be directly nested in external modules or ambient module declarations." },
+        Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambient_context: { code: 2670, category: ts.DiagnosticCategory.Error, key: "Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambien_2670", message: "Augmentations for the global scope should have 'declare' modifier unless they appear in already ambient context." },
+        Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity: { code: 2671, category: ts.DiagnosticCategory.Error, key: "Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity_2671", message: "Cannot augment module '{0}' because it resolves to a non-module entity." },
+        Cannot_assign_a_0_constructor_type_to_a_1_constructor_type: { code: 2672, category: ts.DiagnosticCategory.Error, key: "Cannot_assign_a_0_constructor_type_to_a_1_constructor_type_2672", message: "Cannot assign a '{0}' constructor type to a '{1}' constructor type." },
+        Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration: { code: 2673, category: ts.DiagnosticCategory.Error, key: "Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration_2673", message: "Constructor of class '{0}' is private and only accessible within the class declaration." },
+        Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration: { code: 2674, category: ts.DiagnosticCategory.Error, key: "Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration_2674", message: "Constructor of class '{0}' is protected and only accessible within the class declaration." },
+        Cannot_extend_a_class_0_Class_constructor_is_marked_as_private: { code: 2675, category: ts.DiagnosticCategory.Error, key: "Cannot_extend_a_class_0_Class_constructor_is_marked_as_private_2675", message: "Cannot extend a class '{0}'. Class constructor is marked as private." },
+        Accessors_must_both_be_abstract_or_non_abstract: { code: 2676, category: ts.DiagnosticCategory.Error, key: "Accessors_must_both_be_abstract_or_non_abstract_2676", message: "Accessors must both be abstract or non-abstract." },
+        A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type: { code: 2677, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type_2677", message: "A type predicate's type must be assignable to its parameter's type." },
+        Type_0_is_not_comparable_to_type_1: { code: 2678, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_comparable_to_type_1_2678", message: "Type '{0}' is not comparable to type '{1}'." },
         A_function_that_is_called_with_the_new_keyword_cannot_have_a_this_type_that_is_void: { code: 2679, category: ts.DiagnosticCategory.Error, key: "A_function_that_is_called_with_the_new_keyword_cannot_have_a_this_type_that_is_void_2679", message: "A function that is called with the 'new' keyword cannot have a 'this' type that is 'void'." },
         A_this_parameter_must_be_the_first_parameter: { code: 2680, category: ts.DiagnosticCategory.Error, key: "A_this_parameter_must_be_the_first_parameter_2680", message: "A 'this' parameter must be the first parameter." },
         A_constructor_cannot_have_a_this_parameter: { code: 2681, category: ts.DiagnosticCategory.Error, key: "A_constructor_cannot_have_a_this_parameter_2681", message: "A constructor cannot have a 'this' parameter." },
@@ -8116,17 +9633,32 @@ var ts;
         this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation: { code: 2683, category: ts.DiagnosticCategory.Error, key: "this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_2683", message: "'this' implicitly has type 'any' because it does not have a type annotation." },
         The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1: { code: 2684, category: ts.DiagnosticCategory.Error, key: "The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1_2684", message: "The 'this' context of type '{0}' is not assignable to method's 'this' of type '{1}'." },
         The_this_types_of_each_signature_are_incompatible: { code: 2685, category: ts.DiagnosticCategory.Error, key: "The_this_types_of_each_signature_are_incompatible_2685", message: "The 'this' types of each signature are incompatible." },
-        Identifier_0_must_be_imported_from_a_module: { code: 2686, category: ts.DiagnosticCategory.Error, key: "Identifier_0_must_be_imported_from_a_module_2686", message: "Identifier '{0}' must be imported from a module" },
+        _0_refers_to_a_UMD_global_but_the_current_file_is_a_module_Consider_adding_an_import_instead: { code: 2686, category: ts.DiagnosticCategory.Error, key: "_0_refers_to_a_UMD_global_but_the_current_file_is_a_module_Consider_adding_an_import_instead_2686", message: "'{0}' refers to a UMD global, but the current file is a module. Consider adding an import instead." },
         All_declarations_of_0_must_have_identical_modifiers: { code: 2687, category: ts.DiagnosticCategory.Error, key: "All_declarations_of_0_must_have_identical_modifiers_2687", message: "All declarations of '{0}' must have identical modifiers." },
         Cannot_find_type_definition_file_for_0: { code: 2688, category: ts.DiagnosticCategory.Error, key: "Cannot_find_type_definition_file_for_0_2688", message: "Cannot find type definition file for '{0}'." },
         Cannot_extend_an_interface_0_Did_you_mean_implements: { code: 2689, category: ts.DiagnosticCategory.Error, key: "Cannot_extend_an_interface_0_Did_you_mean_implements_2689", message: "Cannot extend an interface '{0}'. Did you mean 'implements'?" },
-        A_class_must_be_declared_after_its_base_class: { code: 2690, category: ts.DiagnosticCategory.Error, key: "A_class_must_be_declared_after_its_base_class_2690", message: "A class must be declared after its base class." },
         An_import_path_cannot_end_with_a_0_extension_Consider_importing_1_instead: { code: 2691, category: ts.DiagnosticCategory.Error, key: "An_import_path_cannot_end_with_a_0_extension_Consider_importing_1_instead_2691", message: "An import path cannot end with a '{0}' extension. Consider importing '{1}' instead." },
         _0_is_a_primitive_but_1_is_a_wrapper_object_Prefer_using_0_when_possible: { code: 2692, category: ts.DiagnosticCategory.Error, key: "_0_is_a_primitive_but_1_is_a_wrapper_object_Prefer_using_0_when_possible_2692", message: "'{0}' is a primitive, but '{1}' is a wrapper object. Prefer using '{0}' when possible." },
         _0_only_refers_to_a_type_but_is_being_used_as_a_value_here: { code: 2693, category: ts.DiagnosticCategory.Error, key: "_0_only_refers_to_a_type_but_is_being_used_as_a_value_here_2693", message: "'{0}' only refers to a type, but is being used as a value here." },
         Namespace_0_has_no_exported_member_1: { code: 2694, category: ts.DiagnosticCategory.Error, key: "Namespace_0_has_no_exported_member_1_2694", message: "Namespace '{0}' has no exported member '{1}'." },
         Left_side_of_comma_operator_is_unused_and_has_no_side_effects: { code: 2695, category: ts.DiagnosticCategory.Error, key: "Left_side_of_comma_operator_is_unused_and_has_no_side_effects_2695", message: "Left side of comma operator is unused and has no side effects." },
         The_Object_type_is_assignable_to_very_few_other_types_Did_you_mean_to_use_the_any_type_instead: { code: 2696, category: ts.DiagnosticCategory.Error, key: "The_Object_type_is_assignable_to_very_few_other_types_Did_you_mean_to_use_the_any_type_instead_2696", message: "The 'Object' type is assignable to very few other types. Did you mean to use the 'any' type instead?" },
+        An_async_function_or_method_must_return_a_Promise_Make_sure_you_have_a_declaration_for_Promise_or_include_ES2015_in_your_lib_option: { code: 2697, category: ts.DiagnosticCategory.Error, key: "An_async_function_or_method_must_return_a_Promise_Make_sure_you_have_a_declaration_for_Promise_or_in_2697", message: "An async function or method must return a 'Promise'. Make sure you have a declaration for 'Promise' or include 'ES2015' in your `--lib` option." },
+        Spread_types_may_only_be_created_from_object_types: { code: 2698, category: ts.DiagnosticCategory.Error, key: "Spread_types_may_only_be_created_from_object_types_2698", message: "Spread types may only be created from object types." },
+        Static_property_0_conflicts_with_built_in_property_Function_0_of_constructor_function_1: { code: 2699, category: ts.DiagnosticCategory.Error, key: "Static_property_0_conflicts_with_built_in_property_Function_0_of_constructor_function_1_2699", message: "Static property '{0}' conflicts with built-in property 'Function.{0}' of constructor function '{1}'." },
+        Rest_types_may_only_be_created_from_object_types: { code: 2700, category: ts.DiagnosticCategory.Error, key: "Rest_types_may_only_be_created_from_object_types_2700", message: "Rest types may only be created from object types." },
+        The_target_of_an_object_rest_assignment_must_be_a_variable_or_a_property_access: { code: 2701, category: ts.DiagnosticCategory.Error, key: "The_target_of_an_object_rest_assignment_must_be_a_variable_or_a_property_access_2701", message: "The target of an object rest assignment must be a variable or a property access." },
+        _0_only_refers_to_a_type_but_is_being_used_as_a_namespace_here: { code: 2702, category: ts.DiagnosticCategory.Error, key: "_0_only_refers_to_a_type_but_is_being_used_as_a_namespace_here_2702", message: "'{0}' only refers to a type, but is being used as a namespace here." },
+        The_operand_of_a_delete_operator_must_be_a_property_reference: { code: 2703, category: ts.DiagnosticCategory.Error, key: "The_operand_of_a_delete_operator_must_be_a_property_reference_2703", message: "The operand of a delete operator must be a property reference." },
+        The_operand_of_a_delete_operator_cannot_be_a_read_only_property: { code: 2704, category: ts.DiagnosticCategory.Error, key: "The_operand_of_a_delete_operator_cannot_be_a_read_only_property_2704", message: "The operand of a delete operator cannot be a read-only property." },
+        An_async_function_or_method_in_ES5_SlashES3_requires_the_Promise_constructor_Make_sure_you_have_a_declaration_for_the_Promise_constructor_or_include_ES2015_in_your_lib_option: { code: 2705, category: ts.DiagnosticCategory.Error, key: "An_async_function_or_method_in_ES5_SlashES3_requires_the_Promise_constructor_Make_sure_you_have_a_de_2705", message: "An async function or method in ES5/ES3 requires the 'Promise' constructor.  Make sure you have a declaration for the 'Promise' constructor or include 'ES2015' in your `--lib` option." },
+        Required_type_parameters_may_not_follow_optional_type_parameters: { code: 2706, category: ts.DiagnosticCategory.Error, key: "Required_type_parameters_may_not_follow_optional_type_parameters_2706", message: "Required type parameters may not follow optional type parameters." },
+        Generic_type_0_requires_between_1_and_2_type_arguments: { code: 2707, category: ts.DiagnosticCategory.Error, key: "Generic_type_0_requires_between_1_and_2_type_arguments_2707", message: "Generic type '{0}' requires between {1} and {2} type arguments." },
+        Cannot_use_namespace_0_as_a_value: { code: 2708, category: ts.DiagnosticCategory.Error, key: "Cannot_use_namespace_0_as_a_value_2708", message: "Cannot use namespace '{0}' as a value." },
+        Cannot_use_namespace_0_as_a_type: { code: 2709, category: ts.DiagnosticCategory.Error, key: "Cannot_use_namespace_0_as_a_type_2709", message: "Cannot use namespace '{0}' as a type." },
+        _0_are_specified_twice_The_attribute_named_0_will_be_overwritten: { code: 2710, category: ts.DiagnosticCategory.Error, key: "_0_are_specified_twice_The_attribute_named_0_will_be_overwritten_2710", message: "'{0}' are specified twice. The attribute named '{0}' will be overwritten." },
+        A_dynamic_import_call_returns_a_Promise_Make_sure_you_have_a_declaration_for_Promise_or_include_ES2015_in_your_lib_option: { code: 2711, category: ts.DiagnosticCategory.Error, key: "A_dynamic_import_call_returns_a_Promise_Make_sure_you_have_a_declaration_for_Promise_or_include_ES20_2711", message: "A dynamic import call returns a 'Promise'. Make sure you have a declaration for 'Promise' or include 'ES2015' in your `--lib` option." },
+        A_dynamic_import_call_in_ES5_SlashES3_requires_the_Promise_constructor_Make_sure_you_have_a_declaration_for_the_Promise_constructor_or_include_ES2015_in_your_lib_option: { code: 2712, category: ts.DiagnosticCategory.Error, key: "A_dynamic_import_call_in_ES5_SlashES3_requires_the_Promise_constructor_Make_sure_you_have_a_declarat_2712", message: "A dynamic import call in ES5/ES3 requires the 'Promise' constructor.  Make sure you have a declaration for the 'Promise' constructor or include 'ES2015' in your `--lib` option." },
         Import_declaration_0_is_using_private_name_1: { code: 4000, category: ts.DiagnosticCategory.Error, key: "Import_declaration_0_is_using_private_name_1_4000", message: "Import declaration '{0}' is using private name '{1}'." },
         Type_parameter_0_of_exported_class_has_or_is_using_private_name_1: { code: 4002, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_class_has_or_is_using_private_name_1_4002", message: "Type parameter '{0}' of exported class has or is using private name '{1}'." },
         Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1: { code: 4004, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1_4004", message: "Type parameter '{0}' of exported interface has or is using private name '{1}'." },
@@ -8137,8 +9669,8 @@ var ts;
         Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1: { code: 4014, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1_4014", message: "Type parameter '{0}' of method from exported interface has or is using private name '{1}'." },
         Type_parameter_0_of_exported_function_has_or_is_using_private_name_1: { code: 4016, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_function_has_or_is_using_private_name_1_4016", message: "Type parameter '{0}' of exported function has or is using private name '{1}'." },
         Implements_clause_of_exported_class_0_has_or_is_using_private_name_1: { code: 4019, category: ts.DiagnosticCategory.Error, key: "Implements_clause_of_exported_class_0_has_or_is_using_private_name_1_4019", message: "Implements clause of exported class '{0}' has or is using private name '{1}'." },
-        Extends_clause_of_exported_class_0_has_or_is_using_private_name_1: { code: 4020, category: ts.DiagnosticCategory.Error, key: "Extends_clause_of_exported_class_0_has_or_is_using_private_name_1_4020", message: "Extends clause of exported class '{0}' has or is using private name '{1}'." },
-        Extends_clause_of_exported_interface_0_has_or_is_using_private_name_1: { code: 4022, category: ts.DiagnosticCategory.Error, key: "Extends_clause_of_exported_interface_0_has_or_is_using_private_name_1_4022", message: "Extends clause of exported interface '{0}' has or is using private name '{1}'." },
+        extends_clause_of_exported_class_0_has_or_is_using_private_name_1: { code: 4020, category: ts.DiagnosticCategory.Error, key: "extends_clause_of_exported_class_0_has_or_is_using_private_name_1_4020", message: "'extends' clause of exported class '{0}' has or is using private name '{1}'." },
+        extends_clause_of_exported_interface_0_has_or_is_using_private_name_1: { code: 4022, category: ts.DiagnosticCategory.Error, key: "extends_clause_of_exported_interface_0_has_or_is_using_private_name_1_4022", message: "'extends' clause of exported interface '{0}' has or is using private name '{1}'." },
         Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4023, category: ts.DiagnosticCategory.Error, key: "Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named_4023", message: "Exported variable '{0}' has or is using name '{1}' from external module {2} but cannot be named." },
         Exported_variable_0_has_or_is_using_name_1_from_private_module_2: { code: 4024, category: ts.DiagnosticCategory.Error, key: "Exported_variable_0_has_or_is_using_name_1_from_private_module_2_4024", message: "Exported variable '{0}' has or is using name '{1}' from private module '{2}'." },
         Exported_variable_0_has_or_is_using_private_name_1: { code: 4025, category: ts.DiagnosticCategory.Error, key: "Exported_variable_0_has_or_is_using_private_name_1_4025", message: "Exported variable '{0}' has or is using private name '{1}'." },
@@ -8197,17 +9729,20 @@ var ts;
         Parameter_0_of_exported_function_has_or_is_using_private_name_1: { code: 4078, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_exported_function_has_or_is_using_private_name_1_4078", message: "Parameter '{0}' of exported function has or is using private name '{1}'." },
         Exported_type_alias_0_has_or_is_using_private_name_1: { code: 4081, category: ts.DiagnosticCategory.Error, key: "Exported_type_alias_0_has_or_is_using_private_name_1_4081", message: "Exported type alias '{0}' has or is using private name '{1}'." },
         Default_export_of_the_module_has_or_is_using_private_name_0: { code: 4082, category: ts.DiagnosticCategory.Error, key: "Default_export_of_the_module_has_or_is_using_private_name_0_4082", message: "Default export of the module has or is using private name '{0}'." },
+        Type_parameter_0_of_exported_type_alias_has_or_is_using_private_name_1: { code: 4083, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_type_alias_has_or_is_using_private_name_1_4083", message: "Type parameter '{0}' of exported type alias has or is using private name '{1}'." },
         Conflicting_definitions_for_0_found_at_1_and_2_Consider_installing_a_specific_version_of_this_library_to_resolve_the_conflict: { code: 4090, category: ts.DiagnosticCategory.Message, key: "Conflicting_definitions_for_0_found_at_1_and_2_Consider_installing_a_specific_version_of_this_librar_4090", message: "Conflicting definitions for '{0}' found at '{1}' and '{2}'. Consider installing a specific version of this library to resolve the conflict." },
+        Parameter_0_of_index_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2: { code: 4091, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_index_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2_4091", message: "Parameter '{0}' of index signature from exported interface has or is using name '{1}' from private module '{2}'." },
+        Parameter_0_of_index_signature_from_exported_interface_has_or_is_using_private_name_1: { code: 4092, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_index_signature_from_exported_interface_has_or_is_using_private_name_1_4092", message: "Parameter '{0}' of index signature from exported interface has or is using private name '{1}'." },
+        Property_0_of_exported_class_expression_may_not_be_private_or_protected: { code: 4094, category: ts.DiagnosticCategory.Error, key: "Property_0_of_exported_class_expression_may_not_be_private_or_protected_4094", message: "Property '{0}' of exported class expression may not be private or protected." },
         The_current_host_does_not_support_the_0_option: { code: 5001, category: ts.DiagnosticCategory.Error, key: "The_current_host_does_not_support_the_0_option_5001", message: "The current host does not support the '{0}' option." },
         Cannot_find_the_common_subdirectory_path_for_the_input_files: { code: 5009, category: ts.DiagnosticCategory.Error, key: "Cannot_find_the_common_subdirectory_path_for_the_input_files_5009", message: "Cannot find the common subdirectory path for the input files." },
         File_specification_cannot_end_in_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0: { code: 5010, category: ts.DiagnosticCategory.Error, key: "File_specification_cannot_end_in_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0_5010", message: "File specification cannot end in a recursive directory wildcard ('**'): '{0}'." },
         File_specification_cannot_contain_multiple_recursive_directory_wildcards_Asterisk_Asterisk_Colon_0: { code: 5011, category: ts.DiagnosticCategory.Error, key: "File_specification_cannot_contain_multiple_recursive_directory_wildcards_Asterisk_Asterisk_Colon_0_5011", message: "File specification cannot contain multiple recursive directory wildcards ('**'): '{0}'." },
-        Cannot_read_file_0_Colon_1: { code: 5012, category: ts.DiagnosticCategory.Error, key: "Cannot_read_file_0_Colon_1_5012", message: "Cannot read file '{0}': {1}" },
-        Unsupported_file_encoding: { code: 5013, category: ts.DiagnosticCategory.Error, key: "Unsupported_file_encoding_5013", message: "Unsupported file encoding." },
+        Cannot_read_file_0_Colon_1: { code: 5012, category: ts.DiagnosticCategory.Error, key: "Cannot_read_file_0_Colon_1_5012", message: "Cannot read file '{0}': {1}." },
         Failed_to_parse_file_0_Colon_1: { code: 5014, category: ts.DiagnosticCategory.Error, key: "Failed_to_parse_file_0_Colon_1_5014", message: "Failed to parse file '{0}': {1}." },
         Unknown_compiler_option_0: { code: 5023, category: ts.DiagnosticCategory.Error, key: "Unknown_compiler_option_0_5023", message: "Unknown compiler option '{0}'." },
         Compiler_option_0_requires_a_value_of_type_1: { code: 5024, category: ts.DiagnosticCategory.Error, key: "Compiler_option_0_requires_a_value_of_type_1_5024", message: "Compiler option '{0}' requires a value of type {1}." },
-        Could_not_write_file_0_Colon_1: { code: 5033, category: ts.DiagnosticCategory.Error, key: "Could_not_write_file_0_Colon_1_5033", message: "Could not write file '{0}': {1}" },
+        Could_not_write_file_0_Colon_1: { code: 5033, category: ts.DiagnosticCategory.Error, key: "Could_not_write_file_0_Colon_1_5033", message: "Could not write file '{0}': {1}." },
         Option_project_cannot_be_mixed_with_source_files_on_a_command_line: { code: 5042, category: ts.DiagnosticCategory.Error, key: "Option_project_cannot_be_mixed_with_source_files_on_a_command_line_5042", message: "Option 'project' cannot be mixed with source files on a command line." },
         Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES2015_or_higher: { code: 5047, category: ts.DiagnosticCategory.Error, key: "Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES_5047", message: "Option 'isolatedModules' can only be used when either option '--module' is provided or option 'target' is 'ES2015' or higher." },
         Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided: { code: 5051, category: ts.DiagnosticCategory.Error, key: "Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided_5051", message: "Option '{0} can only be used when either option '--inlineSourceMap' or option '--sourceMap' is provided." },
@@ -8216,16 +9751,17 @@ var ts;
         A_tsconfig_json_file_is_already_defined_at_Colon_0: { code: 5054, category: ts.DiagnosticCategory.Error, key: "A_tsconfig_json_file_is_already_defined_at_Colon_0_5054", message: "A 'tsconfig.json' file is already defined at: '{0}'." },
         Cannot_write_file_0_because_it_would_overwrite_input_file: { code: 5055, category: ts.DiagnosticCategory.Error, key: "Cannot_write_file_0_because_it_would_overwrite_input_file_5055", message: "Cannot write file '{0}' because it would overwrite input file." },
         Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files: { code: 5056, category: ts.DiagnosticCategory.Error, key: "Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files_5056", message: "Cannot write file '{0}' because it would be overwritten by multiple input files." },
-        Cannot_find_a_tsconfig_json_file_at_the_specified_directory_Colon_0: { code: 5057, category: ts.DiagnosticCategory.Error, key: "Cannot_find_a_tsconfig_json_file_at_the_specified_directory_Colon_0_5057", message: "Cannot find a tsconfig.json file at the specified directory: '{0}'" },
-        The_specified_path_does_not_exist_Colon_0: { code: 5058, category: ts.DiagnosticCategory.Error, key: "The_specified_path_does_not_exist_Colon_0_5058", message: "The specified path does not exist: '{0}'" },
+        Cannot_find_a_tsconfig_json_file_at_the_specified_directory_Colon_0: { code: 5057, category: ts.DiagnosticCategory.Error, key: "Cannot_find_a_tsconfig_json_file_at_the_specified_directory_Colon_0_5057", message: "Cannot find a tsconfig.json file at the specified directory: '{0}'." },
+        The_specified_path_does_not_exist_Colon_0: { code: 5058, category: ts.DiagnosticCategory.Error, key: "The_specified_path_does_not_exist_Colon_0_5058", message: "The specified path does not exist: '{0}'." },
         Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier: { code: 5059, category: ts.DiagnosticCategory.Error, key: "Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier_5059", message: "Invalid value for '--reactNamespace'. '{0}' is not a valid identifier." },
         Option_paths_cannot_be_used_without_specifying_baseUrl_option: { code: 5060, category: ts.DiagnosticCategory.Error, key: "Option_paths_cannot_be_used_without_specifying_baseUrl_option_5060", message: "Option 'paths' cannot be used without specifying '--baseUrl' option." },
-        Pattern_0_can_have_at_most_one_Asterisk_character: { code: 5061, category: ts.DiagnosticCategory.Error, key: "Pattern_0_can_have_at_most_one_Asterisk_character_5061", message: "Pattern '{0}' can have at most one '*' character" },
-        Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character: { code: 5062, category: ts.DiagnosticCategory.Error, key: "Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character_5062", message: "Substitution '{0}' in pattern '{1}' in can have at most one '*' character" },
+        Pattern_0_can_have_at_most_one_Asterisk_character: { code: 5061, category: ts.DiagnosticCategory.Error, key: "Pattern_0_can_have_at_most_one_Asterisk_character_5061", message: "Pattern '{0}' can have at most one '*' character." },
+        Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character: { code: 5062, category: ts.DiagnosticCategory.Error, key: "Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character_5062", message: "Substitution '{0}' in pattern '{1}' in can have at most one '*' character." },
         Substitutions_for_pattern_0_should_be_an_array: { code: 5063, category: ts.DiagnosticCategory.Error, key: "Substitutions_for_pattern_0_should_be_an_array_5063", message: "Substitutions for pattern '{0}' should be an array." },
         Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2: { code: 5064, category: ts.DiagnosticCategory.Error, key: "Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2_5064", message: "Substitution '{0}' for pattern '{1}' has incorrect type, expected 'string', got '{2}'." },
         File_specification_cannot_contain_a_parent_directory_that_appears_after_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0: { code: 5065, category: ts.DiagnosticCategory.Error, key: "File_specification_cannot_contain_a_parent_directory_that_appears_after_a_recursive_directory_wildca_5065", message: "File specification cannot contain a parent directory ('..') that appears after a recursive directory wildcard ('**'): '{0}'." },
         Substitutions_for_pattern_0_shouldn_t_be_an_empty_array: { code: 5066, category: ts.DiagnosticCategory.Error, key: "Substitutions_for_pattern_0_shouldn_t_be_an_empty_array_5066", message: "Substitutions for pattern '{0}' shouldn't be an empty array." },
+        Invalid_value_for_jsxFactory_0_is_not_a_valid_identifier_or_qualified_name: { code: 5067, category: ts.DiagnosticCategory.Error, key: "Invalid_value_for_jsxFactory_0_is_not_a_valid_identifier_or_qualified_name_5067", message: "Invalid value for 'jsxFactory'. '{0}' is not a valid identifier or qualified-name." },
         Concatenate_and_emit_output_to_single_file: { code: 6001, category: ts.DiagnosticCategory.Message, key: "Concatenate_and_emit_output_to_single_file_6001", message: "Concatenate and emit output to single file." },
         Generates_corresponding_d_ts_file: { code: 6002, category: ts.DiagnosticCategory.Message, key: "Generates_corresponding_d_ts_file_6002", message: "Generates corresponding '.d.ts' file." },
         Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations: { code: 6003, category: ts.DiagnosticCategory.Message, key: "Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations_6003", message: "Specify the location where debugger should locate map files instead of generated locations." },
@@ -8238,11 +9774,11 @@ var ts;
         Do_not_emit_outputs: { code: 6010, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_outputs_6010", message: "Do not emit outputs." },
         Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typechecking: { code: 6011, category: ts.DiagnosticCategory.Message, key: "Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typech_6011", message: "Allow default imports from modules with no default export. This does not affect code emit, just typechecking." },
         Skip_type_checking_of_declaration_files: { code: 6012, category: ts.DiagnosticCategory.Message, key: "Skip_type_checking_of_declaration_files_6012", message: "Skip type checking of declaration files." },
-        Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015: { code: 6015, category: ts.DiagnosticCategory.Message, key: "Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015_6015", message: "Specify ECMAScript target version: 'ES3' (default), 'ES5', or 'ES2015'" },
-        Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015: { code: 6016, category: ts.DiagnosticCategory.Message, key: "Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015_6016", message: "Specify module code generation: 'commonjs', 'amd', 'system', 'umd' or 'es2015'" },
+        Specify_ECMAScript_target_version_Colon_ES3_default_ES5_ES2015_ES2016_ES2017_or_ESNEXT: { code: 6015, category: ts.DiagnosticCategory.Message, key: "Specify_ECMAScript_target_version_Colon_ES3_default_ES5_ES2015_ES2016_ES2017_or_ESNEXT_6015", message: "Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', or 'ESNEXT'." },
+        Specify_module_code_generation_Colon_commonjs_amd_system_umd_es2015_or_ESNext: { code: 6016, category: ts.DiagnosticCategory.Message, key: "Specify_module_code_generation_Colon_commonjs_amd_system_umd_es2015_or_ESNext_6016", message: "Specify module code generation: 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'." },
         Print_this_message: { code: 6017, category: ts.DiagnosticCategory.Message, key: "Print_this_message_6017", message: "Print this message." },
         Print_the_compiler_s_version: { code: 6019, category: ts.DiagnosticCategory.Message, key: "Print_the_compiler_s_version_6019", message: "Print the compiler's version." },
-        Compile_the_project_in_the_given_directory: { code: 6020, category: ts.DiagnosticCategory.Message, key: "Compile_the_project_in_the_given_directory_6020", message: "Compile the project in the given directory." },
+        Compile_the_project_given_the_path_to_its_configuration_file_or_to_a_folder_with_a_tsconfig_json: { code: 6020, category: ts.DiagnosticCategory.Message, key: "Compile_the_project_given_the_path_to_its_configuration_file_or_to_a_folder_with_a_tsconfig_json_6020", message: "Compile the project given the path to its configuration file, or to a folder with a 'tsconfig.json'." },
         Syntax_Colon_0: { code: 6023, category: ts.DiagnosticCategory.Message, key: "Syntax_Colon_0_6023", message: "Syntax: {0}" },
         options: { code: 6024, category: ts.DiagnosticCategory.Message, key: "options_6024", message: "options" },
         file: { code: 6025, category: ts.DiagnosticCategory.Message, key: "file_6025", message: "file" },
@@ -8257,11 +9793,12 @@ var ts;
         LOCATION: { code: 6037, category: ts.DiagnosticCategory.Message, key: "LOCATION_6037", message: "LOCATION" },
         DIRECTORY: { code: 6038, category: ts.DiagnosticCategory.Message, key: "DIRECTORY_6038", message: "DIRECTORY" },
         STRATEGY: { code: 6039, category: ts.DiagnosticCategory.Message, key: "STRATEGY_6039", message: "STRATEGY" },
+        FILE_OR_DIRECTORY: { code: 6040, category: ts.DiagnosticCategory.Message, key: "FILE_OR_DIRECTORY_6040", message: "FILE OR DIRECTORY" },
         Compilation_complete_Watching_for_file_changes: { code: 6042, category: ts.DiagnosticCategory.Message, key: "Compilation_complete_Watching_for_file_changes_6042", message: "Compilation complete. Watching for file changes." },
         Generates_corresponding_map_file: { code: 6043, category: ts.DiagnosticCategory.Message, key: "Generates_corresponding_map_file_6043", message: "Generates corresponding '.map' file." },
         Compiler_option_0_expects_an_argument: { code: 6044, category: ts.DiagnosticCategory.Error, key: "Compiler_option_0_expects_an_argument_6044", message: "Compiler option '{0}' expects an argument." },
         Unterminated_quoted_string_in_response_file_0: { code: 6045, category: ts.DiagnosticCategory.Error, key: "Unterminated_quoted_string_in_response_file_0_6045", message: "Unterminated quoted string in response file '{0}'." },
-        Argument_for_0_option_must_be_Colon_1: { code: 6046, category: ts.DiagnosticCategory.Error, key: "Argument_for_0_option_must_be_Colon_1_6046", message: "Argument for '{0}' option must be: {1}" },
+        Argument_for_0_option_must_be_Colon_1: { code: 6046, category: ts.DiagnosticCategory.Error, key: "Argument_for_0_option_must_be_Colon_1_6046", message: "Argument for '{0}' option must be: {1}." },
         Locale_must_be_of_the_form_language_or_language_territory_For_example_0_or_1: { code: 6048, category: ts.DiagnosticCategory.Error, key: "Locale_must_be_of_the_form_language_or_language_territory_For_example_0_or_1_6048", message: "Locale must be of the form <language> or <language>-<territory>. For example '{0}' or '{1}'." },
         Unsupported_locale_0: { code: 6049, category: ts.DiagnosticCategory.Error, key: "Unsupported_locale_0_6049", message: "Unsupported locale '{0}'." },
         Unable_to_open_file_0: { code: 6050, category: ts.DiagnosticCategory.Error, key: "Unable_to_open_file_0_6050", message: "Unable to open file '{0}'." },
@@ -8283,17 +9820,18 @@ var ts;
         Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file: { code: 6070, category: ts.DiagnosticCategory.Message, key: "Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file_6070", message: "Initializes a TypeScript project and creates a tsconfig.json file." },
         Successfully_created_a_tsconfig_json_file: { code: 6071, category: ts.DiagnosticCategory.Message, key: "Successfully_created_a_tsconfig_json_file_6071", message: "Successfully created a tsconfig.json file." },
         Suppress_excess_property_checks_for_object_literals: { code: 6072, category: ts.DiagnosticCategory.Message, key: "Suppress_excess_property_checks_for_object_literals_6072", message: "Suppress excess property checks for object literals." },
-        Stylize_errors_and_messages_using_color_and_context_experimental: { code: 6073, category: ts.DiagnosticCategory.Message, key: "Stylize_errors_and_messages_using_color_and_context_experimental_6073", message: "Stylize errors and messages using color and context. (experimental)" },
+        Stylize_errors_and_messages_using_color_and_context_experimental: { code: 6073, category: ts.DiagnosticCategory.Message, key: "Stylize_errors_and_messages_using_color_and_context_experimental_6073", message: "Stylize errors and messages using color and context (experimental)." },
         Do_not_report_errors_on_unused_labels: { code: 6074, category: ts.DiagnosticCategory.Message, key: "Do_not_report_errors_on_unused_labels_6074", message: "Do not report errors on unused labels." },
         Report_error_when_not_all_code_paths_in_function_return_a_value: { code: 6075, category: ts.DiagnosticCategory.Message, key: "Report_error_when_not_all_code_paths_in_function_return_a_value_6075", message: "Report error when not all code paths in function return a value." },
         Report_errors_for_fallthrough_cases_in_switch_statement: { code: 6076, category: ts.DiagnosticCategory.Message, key: "Report_errors_for_fallthrough_cases_in_switch_statement_6076", message: "Report errors for fallthrough cases in switch statement." },
         Do_not_report_errors_on_unreachable_code: { code: 6077, category: ts.DiagnosticCategory.Message, key: "Do_not_report_errors_on_unreachable_code_6077", message: "Do not report errors on unreachable code." },
         Disallow_inconsistently_cased_references_to_the_same_file: { code: 6078, category: ts.DiagnosticCategory.Message, key: "Disallow_inconsistently_cased_references_to_the_same_file_6078", message: "Disallow inconsistently-cased references to the same file." },
         Specify_library_files_to_be_included_in_the_compilation_Colon: { code: 6079, category: ts.DiagnosticCategory.Message, key: "Specify_library_files_to_be_included_in_the_compilation_Colon_6079", message: "Specify library files to be included in the compilation: " },
-        Specify_JSX_code_generation_Colon_preserve_or_react: { code: 6080, category: ts.DiagnosticCategory.Message, key: "Specify_JSX_code_generation_Colon_preserve_or_react_6080", message: "Specify JSX code generation: 'preserve' or 'react'" },
+        Specify_JSX_code_generation_Colon_preserve_react_native_or_react: { code: 6080, category: ts.DiagnosticCategory.Message, key: "Specify_JSX_code_generation_Colon_preserve_react_native_or_react_6080", message: "Specify JSX code generation: 'preserve', 'react-native', or 'react'." },
+        File_0_has_an_unsupported_extension_so_skipping_it: { code: 6081, category: ts.DiagnosticCategory.Message, key: "File_0_has_an_unsupported_extension_so_skipping_it_6081", message: "File '{0}' has an unsupported extension, so skipping it." },
         Only_amd_and_system_modules_are_supported_alongside_0: { code: 6082, category: ts.DiagnosticCategory.Error, key: "Only_amd_and_system_modules_are_supported_alongside_0_6082", message: "Only 'amd' and 'system' modules are supported alongside --{0}." },
         Base_directory_to_resolve_non_absolute_module_names: { code: 6083, category: ts.DiagnosticCategory.Message, key: "Base_directory_to_resolve_non_absolute_module_names_6083", message: "Base directory to resolve non-absolute module names." },
-        Specify_the_object_invoked_for_createElement_and_spread_when_targeting_react_JSX_emit: { code: 6084, category: ts.DiagnosticCategory.Message, key: "Specify_the_object_invoked_for_createElement_and_spread_when_targeting_react_JSX_emit_6084", message: "Specify the object invoked for createElement and __spread when targeting 'react' JSX emit" },
+        Deprecated_Use_jsxFactory_instead_Specify_the_object_invoked_for_createElement_when_targeting_react_JSX_emit: { code: 6084, category: ts.DiagnosticCategory.Message, key: "Deprecated_Use_jsxFactory_instead_Specify_the_object_invoked_for_createElement_when_targeting_react__6084", message: "[Deprecated] Use '--jsxFactory' instead. Specify the object invoked for createElement when targeting 'react' JSX emit" },
         Enable_tracing_of_the_name_resolution_process: { code: 6085, category: ts.DiagnosticCategory.Message, key: "Enable_tracing_of_the_name_resolution_process_6085", message: "Enable tracing of the name resolution process." },
         Resolving_module_0_from_1: { code: 6086, category: ts.DiagnosticCategory.Message, key: "Resolving_module_0_from_1_6086", message: "======== Resolving module '{0}' from '{1}'. ========" },
         Explicitly_specified_module_resolution_kind_Colon_0: { code: 6087, category: ts.DiagnosticCategory.Message, key: "Explicitly_specified_module_resolution_kind_Colon_0_6087", message: "Explicitly specified module resolution kind: '{0}'." },
@@ -8304,23 +9842,23 @@ var ts;
         Module_name_0_matched_pattern_1: { code: 6092, category: ts.DiagnosticCategory.Message, key: "Module_name_0_matched_pattern_1_6092", message: "Module name '{0}', matched pattern '{1}'." },
         Trying_substitution_0_candidate_module_location_Colon_1: { code: 6093, category: ts.DiagnosticCategory.Message, key: "Trying_substitution_0_candidate_module_location_Colon_1_6093", message: "Trying substitution '{0}', candidate module location: '{1}'." },
         Resolving_module_name_0_relative_to_base_url_1_2: { code: 6094, category: ts.DiagnosticCategory.Message, key: "Resolving_module_name_0_relative_to_base_url_1_2_6094", message: "Resolving module name '{0}' relative to base url '{1}' - '{2}'." },
-        Loading_module_as_file_Slash_folder_candidate_module_location_0: { code: 6095, category: ts.DiagnosticCategory.Message, key: "Loading_module_as_file_Slash_folder_candidate_module_location_0_6095", message: "Loading module as file / folder, candidate module location '{0}'." },
+        Loading_module_as_file_Slash_folder_candidate_module_location_0_target_file_type_1: { code: 6095, category: ts.DiagnosticCategory.Message, key: "Loading_module_as_file_Slash_folder_candidate_module_location_0_target_file_type_1_6095", message: "Loading module as file / folder, candidate module location '{0}', target file type '{1}'." },
         File_0_does_not_exist: { code: 6096, category: ts.DiagnosticCategory.Message, key: "File_0_does_not_exist_6096", message: "File '{0}' does not exist." },
         File_0_exist_use_it_as_a_name_resolution_result: { code: 6097, category: ts.DiagnosticCategory.Message, key: "File_0_exist_use_it_as_a_name_resolution_result_6097", message: "File '{0}' exist - use it as a name resolution result." },
-        Loading_module_0_from_node_modules_folder: { code: 6098, category: ts.DiagnosticCategory.Message, key: "Loading_module_0_from_node_modules_folder_6098", message: "Loading module '{0}' from 'node_modules' folder." },
+        Loading_module_0_from_node_modules_folder_target_file_type_1: { code: 6098, category: ts.DiagnosticCategory.Message, key: "Loading_module_0_from_node_modules_folder_target_file_type_1_6098", message: "Loading module '{0}' from 'node_modules' folder, target file type '{1}'." },
         Found_package_json_at_0: { code: 6099, category: ts.DiagnosticCategory.Message, key: "Found_package_json_at_0_6099", message: "Found 'package.json' at '{0}'." },
-        package_json_does_not_have_types_field: { code: 6100, category: ts.DiagnosticCategory.Message, key: "package_json_does_not_have_types_field_6100", message: "'package.json' does not have 'types' field." },
+        package_json_does_not_have_a_0_field: { code: 6100, category: ts.DiagnosticCategory.Message, key: "package_json_does_not_have_a_0_field_6100", message: "'package.json' does not have a '{0}' field." },
         package_json_has_0_field_1_that_references_2: { code: 6101, category: ts.DiagnosticCategory.Message, key: "package_json_has_0_field_1_that_references_2_6101", message: "'package.json' has '{0}' field '{1}' that references '{2}'." },
         Allow_javascript_files_to_be_compiled: { code: 6102, category: ts.DiagnosticCategory.Message, key: "Allow_javascript_files_to_be_compiled_6102", message: "Allow javascript files to be compiled." },
         Option_0_should_have_array_of_strings_as_a_value: { code: 6103, category: ts.DiagnosticCategory.Error, key: "Option_0_should_have_array_of_strings_as_a_value_6103", message: "Option '{0}' should have array of strings as a value." },
         Checking_if_0_is_the_longest_matching_prefix_for_1_2: { code: 6104, category: ts.DiagnosticCategory.Message, key: "Checking_if_0_is_the_longest_matching_prefix_for_1_2_6104", message: "Checking if '{0}' is the longest matching prefix for '{1}' - '{2}'." },
         Expected_type_of_0_field_in_package_json_to_be_string_got_1: { code: 6105, category: ts.DiagnosticCategory.Message, key: "Expected_type_of_0_field_in_package_json_to_be_string_got_1_6105", message: "Expected type of '{0}' field in 'package.json' to be 'string', got '{1}'." },
-        baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1: { code: 6106, category: ts.DiagnosticCategory.Message, key: "baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1_6106", message: "'baseUrl' option is set to '{0}', using this value to resolve non-relative module name '{1}'" },
-        rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0: { code: 6107, category: ts.DiagnosticCategory.Message, key: "rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0_6107", message: "'rootDirs' option is set, using it to resolve relative module name '{0}'" },
-        Longest_matching_prefix_for_0_is_1: { code: 6108, category: ts.DiagnosticCategory.Message, key: "Longest_matching_prefix_for_0_is_1_6108", message: "Longest matching prefix for '{0}' is '{1}'" },
-        Loading_0_from_the_root_dir_1_candidate_location_2: { code: 6109, category: ts.DiagnosticCategory.Message, key: "Loading_0_from_the_root_dir_1_candidate_location_2_6109", message: "Loading '{0}' from the root dir '{1}', candidate location '{2}'" },
-        Trying_other_entries_in_rootDirs: { code: 6110, category: ts.DiagnosticCategory.Message, key: "Trying_other_entries_in_rootDirs_6110", message: "Trying other entries in 'rootDirs'" },
-        Module_resolution_using_rootDirs_has_failed: { code: 6111, category: ts.DiagnosticCategory.Message, key: "Module_resolution_using_rootDirs_has_failed_6111", message: "Module resolution using 'rootDirs' has failed" },
+        baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1: { code: 6106, category: ts.DiagnosticCategory.Message, key: "baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1_6106", message: "'baseUrl' option is set to '{0}', using this value to resolve non-relative module name '{1}'." },
+        rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0: { code: 6107, category: ts.DiagnosticCategory.Message, key: "rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0_6107", message: "'rootDirs' option is set, using it to resolve relative module name '{0}'." },
+        Longest_matching_prefix_for_0_is_1: { code: 6108, category: ts.DiagnosticCategory.Message, key: "Longest_matching_prefix_for_0_is_1_6108", message: "Longest matching prefix for '{0}' is '{1}'." },
+        Loading_0_from_the_root_dir_1_candidate_location_2: { code: 6109, category: ts.DiagnosticCategory.Message, key: "Loading_0_from_the_root_dir_1_candidate_location_2_6109", message: "Loading '{0}' from the root dir '{1}', candidate location '{2}'." },
+        Trying_other_entries_in_rootDirs: { code: 6110, category: ts.DiagnosticCategory.Message, key: "Trying_other_entries_in_rootDirs_6110", message: "Trying other entries in 'rootDirs'." },
+        Module_resolution_using_rootDirs_has_failed: { code: 6111, category: ts.DiagnosticCategory.Message, key: "Module_resolution_using_rootDirs_has_failed_6111", message: "Module resolution using 'rootDirs' has failed." },
         Do_not_emit_use_strict_directives_in_module_output: { code: 6112, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_use_strict_directives_in_module_output_6112", message: "Do not emit 'use strict' directives in module output." },
         Enable_strict_null_checks: { code: 6113, category: ts.DiagnosticCategory.Message, key: "Enable_strict_null_checks_6113", message: "Enable strict null checks." },
         Unknown_option_excludes_Did_you_mean_exclude: { code: 6114, category: ts.DiagnosticCategory.Error, key: "Unknown_option_excludes_Did_you_mean_exclude_6114", message: "Unknown option 'excludes'. Did you mean 'exclude'?" },
@@ -8330,26 +9868,71 @@ var ts;
         Resolving_from_node_modules_folder: { code: 6118, category: ts.DiagnosticCategory.Message, key: "Resolving_from_node_modules_folder_6118", message: "Resolving from node_modules folder..." },
         Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2: { code: 6119, category: ts.DiagnosticCategory.Message, key: "Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2_6119", message: "======== Type reference directive '{0}' was successfully resolved to '{1}', primary: {2}. ========" },
         Type_reference_directive_0_was_not_resolved: { code: 6120, category: ts.DiagnosticCategory.Message, key: "Type_reference_directive_0_was_not_resolved_6120", message: "======== Type reference directive '{0}' was not resolved. ========" },
-        Resolving_with_primary_search_path_0: { code: 6121, category: ts.DiagnosticCategory.Message, key: "Resolving_with_primary_search_path_0_6121", message: "Resolving with primary search path '{0}'" },
+        Resolving_with_primary_search_path_0: { code: 6121, category: ts.DiagnosticCategory.Message, key: "Resolving_with_primary_search_path_0_6121", message: "Resolving with primary search path '{0}'." },
         Root_directory_cannot_be_determined_skipping_primary_search_paths: { code: 6122, category: ts.DiagnosticCategory.Message, key: "Root_directory_cannot_be_determined_skipping_primary_search_paths_6122", message: "Root directory cannot be determined, skipping primary search paths." },
         Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set: { code: 6123, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set_6123", message: "======== Resolving type reference directive '{0}', containing file '{1}', root directory not set. ========" },
         Type_declaration_files_to_be_included_in_compilation: { code: 6124, category: ts.DiagnosticCategory.Message, key: "Type_declaration_files_to_be_included_in_compilation_6124", message: "Type declaration files to be included in compilation." },
-        Looking_up_in_node_modules_folder_initial_location_0: { code: 6125, category: ts.DiagnosticCategory.Message, key: "Looking_up_in_node_modules_folder_initial_location_0_6125", message: "Looking up in 'node_modules' folder, initial location '{0}'" },
+        Looking_up_in_node_modules_folder_initial_location_0: { code: 6125, category: ts.DiagnosticCategory.Message, key: "Looking_up_in_node_modules_folder_initial_location_0_6125", message: "Looking up in 'node_modules' folder, initial location '{0}'." },
         Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_modules_folder: { code: 6126, category: ts.DiagnosticCategory.Message, key: "Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_mod_6126", message: "Containing file is not specified and root directory cannot be determined, skipping lookup in 'node_modules' folder." },
         Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1: { code: 6127, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1_6127", message: "======== Resolving type reference directive '{0}', containing file not set, root directory '{1}'. ========" },
         Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set: { code: 6128, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set_6128", message: "======== Resolving type reference directive '{0}', containing file not set, root directory not set. ========" },
         The_config_file_0_found_doesn_t_contain_any_source_files: { code: 6129, category: ts.DiagnosticCategory.Error, key: "The_config_file_0_found_doesn_t_contain_any_source_files_6129", message: "The config file '{0}' found doesn't contain any source files." },
-        Resolving_real_path_for_0_result_1: { code: 6130, category: ts.DiagnosticCategory.Message, key: "Resolving_real_path_for_0_result_1_6130", message: "Resolving real path for '{0}', result '{1}'" },
+        Resolving_real_path_for_0_result_1: { code: 6130, category: ts.DiagnosticCategory.Message, key: "Resolving_real_path_for_0_result_1_6130", message: "Resolving real path for '{0}', result '{1}'." },
         Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system: { code: 6131, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system_6131", message: "Cannot compile modules using option '{0}' unless the '--module' flag is 'amd' or 'system'." },
-        File_name_0_has_a_1_extension_stripping_it: { code: 6132, category: ts.DiagnosticCategory.Message, key: "File_name_0_has_a_1_extension_stripping_it_6132", message: "File name '{0}' has a '{1}' extension - stripping it" },
+        File_name_0_has_a_1_extension_stripping_it: { code: 6132, category: ts.DiagnosticCategory.Message, key: "File_name_0_has_a_1_extension_stripping_it_6132", message: "File name '{0}' has a '{1}' extension - stripping it." },
         _0_is_declared_but_never_used: { code: 6133, category: ts.DiagnosticCategory.Error, key: "_0_is_declared_but_never_used_6133", message: "'{0}' is declared but never used." },
         Report_errors_on_unused_locals: { code: 6134, category: ts.DiagnosticCategory.Message, key: "Report_errors_on_unused_locals_6134", message: "Report errors on unused locals." },
         Report_errors_on_unused_parameters: { code: 6135, category: ts.DiagnosticCategory.Message, key: "Report_errors_on_unused_parameters_6135", message: "Report errors on unused parameters." },
-        The_maximum_dependency_depth_to_search_under_node_modules_and_load_JavaScript_files: { code: 6136, category: ts.DiagnosticCategory.Message, key: "The_maximum_dependency_depth_to_search_under_node_modules_and_load_JavaScript_files_6136", message: "The maximum dependency depth to search under node_modules and load JavaScript files" },
-        No_types_specified_in_package_json_but_allowJs_is_set_so_returning_main_value_of_0: { code: 6137, category: ts.DiagnosticCategory.Message, key: "No_types_specified_in_package_json_but_allowJs_is_set_so_returning_main_value_of_0_6137", message: "No types specified in 'package.json' but 'allowJs' is set, so returning 'main' value of '{0}'" },
+        The_maximum_dependency_depth_to_search_under_node_modules_and_load_JavaScript_files: { code: 6136, category: ts.DiagnosticCategory.Message, key: "The_maximum_dependency_depth_to_search_under_node_modules_and_load_JavaScript_files_6136", message: "The maximum dependency depth to search under node_modules and load JavaScript files." },
+        Cannot_import_type_declaration_files_Consider_importing_0_instead_of_1: { code: 6137, category: ts.DiagnosticCategory.Error, key: "Cannot_import_type_declaration_files_Consider_importing_0_instead_of_1_6137", message: "Cannot import type declaration files. Consider importing '{0}' instead of '{1}'." },
         Property_0_is_declared_but_never_used: { code: 6138, category: ts.DiagnosticCategory.Error, key: "Property_0_is_declared_but_never_used_6138", message: "Property '{0}' is declared but never used." },
         Import_emit_helpers_from_tslib: { code: 6139, category: ts.DiagnosticCategory.Message, key: "Import_emit_helpers_from_tslib_6139", message: "Import emit helpers from 'tslib'." },
         Auto_discovery_for_typings_is_enabled_in_project_0_Running_extra_resolution_pass_for_module_1_using_cache_location_2: { code: 6140, category: ts.DiagnosticCategory.Error, key: "Auto_discovery_for_typings_is_enabled_in_project_0_Running_extra_resolution_pass_for_module_1_using__6140", message: "Auto discovery for typings is enabled in project '{0}'. Running extra resolution pass for module '{1}' using cache location '{2}'." },
+        Parse_in_strict_mode_and_emit_use_strict_for_each_source_file: { code: 6141, category: ts.DiagnosticCategory.Message, key: "Parse_in_strict_mode_and_emit_use_strict_for_each_source_file_6141", message: "Parse in strict mode and emit \"use strict\" for each source file." },
+        Module_0_was_resolved_to_1_but_jsx_is_not_set: { code: 6142, category: ts.DiagnosticCategory.Error, key: "Module_0_was_resolved_to_1_but_jsx_is_not_set_6142", message: "Module '{0}' was resolved to '{1}', but '--jsx' is not set." },
+        Module_0_was_resolved_to_1_but_allowJs_is_not_set: { code: 6143, category: ts.DiagnosticCategory.Error, key: "Module_0_was_resolved_to_1_but_allowJs_is_not_set_6143", message: "Module '{0}' was resolved to '{1}', but '--allowJs' is not set." },
+        Module_0_was_resolved_as_locally_declared_ambient_module_in_file_1: { code: 6144, category: ts.DiagnosticCategory.Message, key: "Module_0_was_resolved_as_locally_declared_ambient_module_in_file_1_6144", message: "Module '{0}' was resolved as locally declared ambient module in file '{1}'." },
+        Module_0_was_resolved_as_ambient_module_declared_in_1_since_this_file_was_not_modified: { code: 6145, category: ts.DiagnosticCategory.Message, key: "Module_0_was_resolved_as_ambient_module_declared_in_1_since_this_file_was_not_modified_6145", message: "Module '{0}' was resolved as ambient module declared in '{1}' since this file was not modified." },
+        Specify_the_JSX_factory_function_to_use_when_targeting_react_JSX_emit_e_g_React_createElement_or_h: { code: 6146, category: ts.DiagnosticCategory.Message, key: "Specify_the_JSX_factory_function_to_use_when_targeting_react_JSX_emit_e_g_React_createElement_or_h_6146", message: "Specify the JSX factory function to use when targeting 'react' JSX emit, e.g. 'React.createElement' or 'h'." },
+        Resolution_for_module_0_was_found_in_cache: { code: 6147, category: ts.DiagnosticCategory.Message, key: "Resolution_for_module_0_was_found_in_cache_6147", message: "Resolution for module '{0}' was found in cache." },
+        Directory_0_does_not_exist_skipping_all_lookups_in_it: { code: 6148, category: ts.DiagnosticCategory.Message, key: "Directory_0_does_not_exist_skipping_all_lookups_in_it_6148", message: "Directory '{0}' does not exist, skipping all lookups in it." },
+        Show_diagnostic_information: { code: 6149, category: ts.DiagnosticCategory.Message, key: "Show_diagnostic_information_6149", message: "Show diagnostic information." },
+        Show_verbose_diagnostic_information: { code: 6150, category: ts.DiagnosticCategory.Message, key: "Show_verbose_diagnostic_information_6150", message: "Show verbose diagnostic information." },
+        Emit_a_single_file_with_source_maps_instead_of_having_a_separate_file: { code: 6151, category: ts.DiagnosticCategory.Message, key: "Emit_a_single_file_with_source_maps_instead_of_having_a_separate_file_6151", message: "Emit a single file with source maps instead of having a separate file." },
+        Emit_the_source_alongside_the_sourcemaps_within_a_single_file_requires_inlineSourceMap_or_sourceMap_to_be_set: { code: 6152, category: ts.DiagnosticCategory.Message, key: "Emit_the_source_alongside_the_sourcemaps_within_a_single_file_requires_inlineSourceMap_or_sourceMap__6152", message: "Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set." },
+        Transpile_each_file_as_a_separate_module_similar_to_ts_transpileModule: { code: 6153, category: ts.DiagnosticCategory.Message, key: "Transpile_each_file_as_a_separate_module_similar_to_ts_transpileModule_6153", message: "Transpile each file as a separate module (similar to 'ts.transpileModule')." },
+        Print_names_of_generated_files_part_of_the_compilation: { code: 6154, category: ts.DiagnosticCategory.Message, key: "Print_names_of_generated_files_part_of_the_compilation_6154", message: "Print names of generated files part of the compilation." },
+        Print_names_of_files_part_of_the_compilation: { code: 6155, category: ts.DiagnosticCategory.Message, key: "Print_names_of_files_part_of_the_compilation_6155", message: "Print names of files part of the compilation." },
+        The_locale_used_when_displaying_messages_to_the_user_e_g_en_us: { code: 6156, category: ts.DiagnosticCategory.Message, key: "The_locale_used_when_displaying_messages_to_the_user_e_g_en_us_6156", message: "The locale used when displaying messages to the user (e.g. 'en-us')" },
+        Do_not_generate_custom_helper_functions_like_extends_in_compiled_output: { code: 6157, category: ts.DiagnosticCategory.Message, key: "Do_not_generate_custom_helper_functions_like_extends_in_compiled_output_6157", message: "Do not generate custom helper functions like '__extends' in compiled output." },
+        Do_not_include_the_default_library_file_lib_d_ts: { code: 6158, category: ts.DiagnosticCategory.Message, key: "Do_not_include_the_default_library_file_lib_d_ts_6158", message: "Do not include the default library file (lib.d.ts)." },
+        Do_not_add_triple_slash_references_or_imported_modules_to_the_list_of_compiled_files: { code: 6159, category: ts.DiagnosticCategory.Message, key: "Do_not_add_triple_slash_references_or_imported_modules_to_the_list_of_compiled_files_6159", message: "Do not add triple-slash references or imported modules to the list of compiled files." },
+        Deprecated_Use_skipLibCheck_instead_Skip_type_checking_of_default_library_declaration_files: { code: 6160, category: ts.DiagnosticCategory.Message, key: "Deprecated_Use_skipLibCheck_instead_Skip_type_checking_of_default_library_declaration_files_6160", message: "[Deprecated] Use '--skipLibCheck' instead. Skip type checking of default library declaration files." },
+        List_of_folders_to_include_type_definitions_from: { code: 6161, category: ts.DiagnosticCategory.Message, key: "List_of_folders_to_include_type_definitions_from_6161", message: "List of folders to include type definitions from." },
+        Disable_size_limitations_on_JavaScript_projects: { code: 6162, category: ts.DiagnosticCategory.Message, key: "Disable_size_limitations_on_JavaScript_projects_6162", message: "Disable size limitations on JavaScript projects." },
+        The_character_set_of_the_input_files: { code: 6163, category: ts.DiagnosticCategory.Message, key: "The_character_set_of_the_input_files_6163", message: "The character set of the input files." },
+        Emit_a_UTF_8_Byte_Order_Mark_BOM_in_the_beginning_of_output_files: { code: 6164, category: ts.DiagnosticCategory.Message, key: "Emit_a_UTF_8_Byte_Order_Mark_BOM_in_the_beginning_of_output_files_6164", message: "Emit a UTF-8 Byte Order Mark (BOM) in the beginning of output files." },
+        Do_not_truncate_error_messages: { code: 6165, category: ts.DiagnosticCategory.Message, key: "Do_not_truncate_error_messages_6165", message: "Do not truncate error messages." },
+        Output_directory_for_generated_declaration_files: { code: 6166, category: ts.DiagnosticCategory.Message, key: "Output_directory_for_generated_declaration_files_6166", message: "Output directory for generated declaration files." },
+        A_series_of_entries_which_re_map_imports_to_lookup_locations_relative_to_the_baseUrl: { code: 6167, category: ts.DiagnosticCategory.Message, key: "A_series_of_entries_which_re_map_imports_to_lookup_locations_relative_to_the_baseUrl_6167", message: "A series of entries which re-map imports to lookup locations relative to the 'baseUrl'." },
+        List_of_root_folders_whose_combined_content_represents_the_structure_of_the_project_at_runtime: { code: 6168, category: ts.DiagnosticCategory.Message, key: "List_of_root_folders_whose_combined_content_represents_the_structure_of_the_project_at_runtime_6168", message: "List of root folders whose combined content represents the structure of the project at runtime." },
+        Show_all_compiler_options: { code: 6169, category: ts.DiagnosticCategory.Message, key: "Show_all_compiler_options_6169", message: "Show all compiler options." },
+        Deprecated_Use_outFile_instead_Concatenate_and_emit_output_to_single_file: { code: 6170, category: ts.DiagnosticCategory.Message, key: "Deprecated_Use_outFile_instead_Concatenate_and_emit_output_to_single_file_6170", message: "[Deprecated] Use '--outFile' instead. Concatenate and emit output to single file" },
+        Command_line_Options: { code: 6171, category: ts.DiagnosticCategory.Message, key: "Command_line_Options_6171", message: "Command-line Options" },
+        Basic_Options: { code: 6172, category: ts.DiagnosticCategory.Message, key: "Basic_Options_6172", message: "Basic Options" },
+        Strict_Type_Checking_Options: { code: 6173, category: ts.DiagnosticCategory.Message, key: "Strict_Type_Checking_Options_6173", message: "Strict Type-Checking Options" },
+        Module_Resolution_Options: { code: 6174, category: ts.DiagnosticCategory.Message, key: "Module_Resolution_Options_6174", message: "Module Resolution Options" },
+        Source_Map_Options: { code: 6175, category: ts.DiagnosticCategory.Message, key: "Source_Map_Options_6175", message: "Source Map Options" },
+        Additional_Checks: { code: 6176, category: ts.DiagnosticCategory.Message, key: "Additional_Checks_6176", message: "Additional Checks" },
+        Experimental_Options: { code: 6177, category: ts.DiagnosticCategory.Message, key: "Experimental_Options_6177", message: "Experimental Options" },
+        Advanced_Options: { code: 6178, category: ts.DiagnosticCategory.Message, key: "Advanced_Options_6178", message: "Advanced Options" },
+        Provide_full_support_for_iterables_in_for_of_spread_and_destructuring_when_targeting_ES5_or_ES3: { code: 6179, category: ts.DiagnosticCategory.Message, key: "Provide_full_support_for_iterables_in_for_of_spread_and_destructuring_when_targeting_ES5_or_ES3_6179", message: "Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'." },
+        Enable_all_strict_type_checking_options: { code: 6180, category: ts.DiagnosticCategory.Message, key: "Enable_all_strict_type_checking_options_6180", message: "Enable all strict type-checking options." },
+        List_of_language_service_plugins: { code: 6181, category: ts.DiagnosticCategory.Message, key: "List_of_language_service_plugins_6181", message: "List of language service plugins." },
+        Scoped_package_detected_looking_in_0: { code: 6182, category: ts.DiagnosticCategory.Message, key: "Scoped_package_detected_looking_in_0_6182", message: "Scoped package detected, looking in '{0}'" },
+        Reusing_resolution_of_module_0_to_file_1_from_old_program: { code: 6183, category: ts.DiagnosticCategory.Message, key: "Reusing_resolution_of_module_0_to_file_1_from_old_program_6183", message: "Reusing resolution of module '{0}' to file '{1}' from old program." },
+        Reusing_module_resolutions_originating_in_0_since_resolutions_are_unchanged_from_old_program: { code: 6184, category: ts.DiagnosticCategory.Message, key: "Reusing_module_resolutions_originating_in_0_since_resolutions_are_unchanged_from_old_program_6184", message: "Reusing module resolutions originating in '{0}' since resolutions are unchanged from old program." },
+        Disable_strict_checking_of_generic_signatures_in_function_types: { code: 6185, category: ts.DiagnosticCategory.Message, key: "Disable_strict_checking_of_generic_signatures_in_function_types_6185", message: "Disable strict checking of generic signatures in function types." },
         Variable_0_implicitly_has_an_1_type: { code: 7005, category: ts.DiagnosticCategory.Error, key: "Variable_0_implicitly_has_an_1_type_7005", message: "Variable '{0}' implicitly has an '{1}' type." },
         Parameter_0_implicitly_has_an_1_type: { code: 7006, category: ts.DiagnosticCategory.Error, key: "Parameter_0_implicitly_has_an_1_type_7006", message: "Parameter '{0}' implicitly has an '{1}' type." },
         Member_0_implicitly_has_an_1_type: { code: 7008, category: ts.DiagnosticCategory.Error, key: "Member_0_implicitly_has_an_1_type_7008", message: "Member '{0}' implicitly has an '{1}' type." },
@@ -8358,7 +9941,8 @@ var ts;
         Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type: { code: 7011, category: ts.DiagnosticCategory.Error, key: "Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type_7011", message: "Function expression, which lacks return-type annotation, implicitly has an '{0}' return type." },
         Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type: { code: 7013, category: ts.DiagnosticCategory.Error, key: "Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type_7013", message: "Construct signature, which lacks return-type annotation, implicitly has an 'any' return type." },
         Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number: { code: 7015, category: ts.DiagnosticCategory.Error, key: "Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number_7015", message: "Element implicitly has an 'any' type because index expression is not of type 'number'." },
-        Index_signature_of_object_type_implicitly_has_an_any_type: { code: 7017, category: ts.DiagnosticCategory.Error, key: "Index_signature_of_object_type_implicitly_has_an_any_type_7017", message: "Index signature of object type implicitly has an 'any' type." },
+        Could_not_find_a_declaration_file_for_module_0_1_implicitly_has_an_any_type: { code: 7016, category: ts.DiagnosticCategory.Error, key: "Could_not_find_a_declaration_file_for_module_0_1_implicitly_has_an_any_type_7016", message: "Could not find a declaration file for module '{0}'. '{1}' implicitly has an 'any' type." },
+        Element_implicitly_has_an_any_type_because_type_0_has_no_index_signature: { code: 7017, category: ts.DiagnosticCategory.Error, key: "Element_implicitly_has_an_any_type_because_type_0_has_no_index_signature_7017", message: "Element implicitly has an 'any' type because type '{0}' has no index signature." },
         Object_literal_s_property_0_implicitly_has_an_1_type: { code: 7018, category: ts.DiagnosticCategory.Error, key: "Object_literal_s_property_0_implicitly_has_an_1_type_7018", message: "Object literal's property '{0}' implicitly has an '{1}' type." },
         Rest_parameter_0_implicitly_has_an_any_type: { code: 7019, category: ts.DiagnosticCategory.Error, key: "Rest_parameter_0_implicitly_has_an_any_type_7019", message: "Rest parameter '{0}' implicitly has an 'any[]' type." },
         Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type: { code: 7020, category: ts.DiagnosticCategory.Error, key: "Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type_7020", message: "Call signature, which lacks return-type annotation, implicitly has an 'any' return type." },
@@ -8366,7 +9950,7 @@ var ts;
         _0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions: { code: 7023, category: ts.DiagnosticCategory.Error, key: "_0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_reference_7023", message: "'{0}' implicitly has return type 'any' because it does not have a return type annotation and is referenced directly or indirectly in one of its return expressions." },
         Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions: { code: 7024, category: ts.DiagnosticCategory.Error, key: "Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_ref_7024", message: "Function implicitly has return type 'any' because it does not have a return type annotation and is referenced directly or indirectly in one of its return expressions." },
         Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_type: { code: 7025, category: ts.DiagnosticCategory.Error, key: "Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_typ_7025", message: "Generator implicitly has type '{0}' because it does not yield any values. Consider supplying a return type." },
-        JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists: { code: 7026, category: ts.DiagnosticCategory.Error, key: "JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists_7026", message: "JSX element implicitly has type 'any' because no interface 'JSX.{0}' exists" },
+        JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists: { code: 7026, category: ts.DiagnosticCategory.Error, key: "JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists_7026", message: "JSX element implicitly has type 'any' because no interface 'JSX.{0}' exists." },
         Unreachable_code_detected: { code: 7027, category: ts.DiagnosticCategory.Error, key: "Unreachable_code_detected_7027", message: "Unreachable code detected." },
         Unused_label: { code: 7028, category: ts.DiagnosticCategory.Error, key: "Unused_label_7028", message: "Unused label." },
         Fallthrough_case_in_switch: { code: 7029, category: ts.DiagnosticCategory.Error, key: "Fallthrough_case_in_switch_7029", message: "Fallthrough case in switch." },
@@ -8374,6 +9958,9 @@ var ts;
         Binding_element_0_implicitly_has_an_1_type: { code: 7031, category: ts.DiagnosticCategory.Error, key: "Binding_element_0_implicitly_has_an_1_type_7031", message: "Binding element '{0}' implicitly has an '{1}' type." },
         Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_parameter_type_annotation: { code: 7032, category: ts.DiagnosticCategory.Error, key: "Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_parameter_type_annotation_7032", message: "Property '{0}' implicitly has type 'any', because its set accessor lacks a parameter type annotation." },
         Property_0_implicitly_has_type_any_because_its_get_accessor_lacks_a_return_type_annotation: { code: 7033, category: ts.DiagnosticCategory.Error, key: "Property_0_implicitly_has_type_any_because_its_get_accessor_lacks_a_return_type_annotation_7033", message: "Property '{0}' implicitly has type 'any', because its get accessor lacks a return type annotation." },
+        Variable_0_implicitly_has_type_1_in_some_locations_where_its_type_cannot_be_determined: { code: 7034, category: ts.DiagnosticCategory.Error, key: "Variable_0_implicitly_has_type_1_in_some_locations_where_its_type_cannot_be_determined_7034", message: "Variable '{0}' implicitly has type '{1}' in some locations where its type cannot be determined." },
+        Try_npm_install_types_Slash_0_if_it_exists_or_add_a_new_declaration_d_ts_file_containing_declare_module_0: { code: 7035, category: ts.DiagnosticCategory.Error, key: "Try_npm_install_types_Slash_0_if_it_exists_or_add_a_new_declaration_d_ts_file_containing_declare_mod_7035", message: "Try `npm install @types/{0}` if it exists or add a new declaration (.d.ts) file containing `declare module '{0}';`" },
+        Dynamic_import_s_specifier_must_be_of_type_string_but_here_has_type_0: { code: 7036, category: ts.DiagnosticCategory.Error, key: "Dynamic_import_s_specifier_must_be_of_type_string_but_here_has_type_0_7036", message: "Dynamic import's specifier must be of type 'string', but here has type '{0}'." },
         You_cannot_rename_this_element: { code: 8000, category: ts.DiagnosticCategory.Error, key: "You_cannot_rename_this_element_8000", message: "You cannot rename this element." },
         You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library: { code: 8001, category: ts.DiagnosticCategory.Error, key: "You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library_8001", message: "You cannot rename elements that are defined in the standard TypeScript library." },
         import_can_only_be_used_in_a_ts_file: { code: 8002, category: ts.DiagnosticCategory.Error, key: "import_can_only_be_used_in_a_ts_file_8002", message: "'import ... =' can only be used in a .ts file." },
@@ -8389,36362 +9976,43589 @@ var ts;
         parameter_modifiers_can_only_be_used_in_a_ts_file: { code: 8012, category: ts.DiagnosticCategory.Error, key: "parameter_modifiers_can_only_be_used_in_a_ts_file_8012", message: "'parameter modifiers' can only be used in a .ts file." },
         enum_declarations_can_only_be_used_in_a_ts_file: { code: 8015, category: ts.DiagnosticCategory.Error, key: "enum_declarations_can_only_be_used_in_a_ts_file_8015", message: "'enum declarations' can only be used in a .ts file." },
         type_assertion_expressions_can_only_be_used_in_a_ts_file: { code: 8016, category: ts.DiagnosticCategory.Error, key: "type_assertion_expressions_can_only_be_used_in_a_ts_file_8016", message: "'type assertion expressions' can only be used in a .ts file." },
-        Only_identifiers_Slashqualified_names_with_optional_type_arguments_are_currently_supported_in_a_class_extends_clauses: { code: 9002, category: ts.DiagnosticCategory.Error, key: "Only_identifiers_Slashqualified_names_with_optional_type_arguments_are_currently_supported_in_a_clas_9002", message: "Only identifiers/qualified-names with optional type arguments are currently supported in a class 'extends' clauses." },
+        Only_identifiers_Slashqualified_names_with_optional_type_arguments_are_currently_supported_in_a_class_extends_clause: { code: 9002, category: ts.DiagnosticCategory.Error, key: "Only_identifiers_Slashqualified_names_with_optional_type_arguments_are_currently_supported_in_a_clas_9002", message: "Only identifiers/qualified-names with optional type arguments are currently supported in a class 'extends' clause." },
         class_expressions_are_not_currently_supported: { code: 9003, category: ts.DiagnosticCategory.Error, key: "class_expressions_are_not_currently_supported_9003", message: "'class' expressions are not currently supported." },
+        Language_service_is_disabled: { code: 9004, category: ts.DiagnosticCategory.Error, key: "Language_service_is_disabled_9004", message: "Language service is disabled." },
         JSX_attributes_must_only_be_assigned_a_non_empty_expression: { code: 17000, category: ts.DiagnosticCategory.Error, key: "JSX_attributes_must_only_be_assigned_a_non_empty_expression_17000", message: "JSX attributes must only be assigned a non-empty 'expression'." },
         JSX_elements_cannot_have_multiple_attributes_with_the_same_name: { code: 17001, category: ts.DiagnosticCategory.Error, key: "JSX_elements_cannot_have_multiple_attributes_with_the_same_name_17001", message: "JSX elements cannot have multiple attributes with the same name." },
         Expected_corresponding_JSX_closing_tag_for_0: { code: 17002, category: ts.DiagnosticCategory.Error, key: "Expected_corresponding_JSX_closing_tag_for_0_17002", message: "Expected corresponding JSX closing tag for '{0}'." },
         JSX_attribute_expected: { code: 17003, category: ts.DiagnosticCategory.Error, key: "JSX_attribute_expected_17003", message: "JSX attribute expected." },
         Cannot_use_JSX_unless_the_jsx_flag_is_provided: { code: 17004, category: ts.DiagnosticCategory.Error, key: "Cannot_use_JSX_unless_the_jsx_flag_is_provided_17004", message: "Cannot use JSX unless the '--jsx' flag is provided." },
-        A_constructor_cannot_contain_a_super_call_when_its_class_extends_null: { code: 17005, category: ts.DiagnosticCategory.Error, key: "A_constructor_cannot_contain_a_super_call_when_its_class_extends_null_17005", message: "A constructor cannot contain a 'super' call when its class extends 'null'" },
+        A_constructor_cannot_contain_a_super_call_when_its_class_extends_null: { code: 17005, category: ts.DiagnosticCategory.Error, key: "A_constructor_cannot_contain_a_super_call_when_its_class_extends_null_17005", message: "A constructor cannot contain a 'super' call when its class extends 'null'." },
         An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses: { code: 17006, category: ts.DiagnosticCategory.Error, key: "An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_ex_17006", message: "An unary expression with the '{0}' operator is not allowed in the left-hand side of an exponentiation expression. Consider enclosing the expression in parentheses." },
         A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses: { code: 17007, category: ts.DiagnosticCategory.Error, key: "A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Con_17007", message: "A type assertion expression is not allowed in the left-hand side of an exponentiation expression. Consider enclosing the expression in parentheses." },
         JSX_element_0_has_no_corresponding_closing_tag: { code: 17008, category: ts.DiagnosticCategory.Error, key: "JSX_element_0_has_no_corresponding_closing_tag_17008", message: "JSX element '{0}' has no corresponding closing tag." },
         super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class: { code: 17009, category: ts.DiagnosticCategory.Error, key: "super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class_17009", message: "'super' must be called before accessing 'this' in the constructor of a derived class." },
-        Unknown_typing_option_0: { code: 17010, category: ts.DiagnosticCategory.Error, key: "Unknown_typing_option_0_17010", message: "Unknown typing option '{0}'." },
+        Unknown_type_acquisition_option_0: { code: 17010, category: ts.DiagnosticCategory.Error, key: "Unknown_type_acquisition_option_0_17010", message: "Unknown type acquisition option '{0}'." },
+        super_must_be_called_before_accessing_a_property_of_super_in_the_constructor_of_a_derived_class: { code: 17011, category: ts.DiagnosticCategory.Error, key: "super_must_be_called_before_accessing_a_property_of_super_in_the_constructor_of_a_derived_class_17011", message: "'super' must be called before accessing a property of 'super' in the constructor of a derived class." },
+        _0_is_not_a_valid_meta_property_for_keyword_1_Did_you_mean_2: { code: 17012, category: ts.DiagnosticCategory.Error, key: "_0_is_not_a_valid_meta_property_for_keyword_1_Did_you_mean_2_17012", message: "'{0}' is not a valid meta-property for keyword '{1}'. Did you mean '{2}'?" },
+        Meta_property_0_is_only_allowed_in_the_body_of_a_function_declaration_function_expression_or_constructor: { code: 17013, category: ts.DiagnosticCategory.Error, key: "Meta_property_0_is_only_allowed_in_the_body_of_a_function_declaration_function_expression_or_constru_17013", message: "Meta-property '{0}' is only allowed in the body of a function declaration, function expression, or constructor." },
         Circularity_detected_while_resolving_configuration_Colon_0: { code: 18000, category: ts.DiagnosticCategory.Error, key: "Circularity_detected_while_resolving_configuration_Colon_0_18000", message: "Circularity detected while resolving configuration: {0}" },
-        The_path_in_an_extends_options_must_be_relative_or_rooted: { code: 18001, category: ts.DiagnosticCategory.Error, key: "The_path_in_an_extends_options_must_be_relative_or_rooted_18001", message: "The path in an 'extends' options must be relative or rooted." },
+        A_path_in_an_extends_option_must_be_relative_or_rooted_but_0_is_not: { code: 18001, category: ts.DiagnosticCategory.Error, key: "A_path_in_an_extends_option_must_be_relative_or_rooted_but_0_is_not_18001", message: "A path in an 'extends' option must be relative or rooted, but '{0}' is not." },
+        The_files_list_in_config_file_0_is_empty: { code: 18002, category: ts.DiagnosticCategory.Error, key: "The_files_list_in_config_file_0_is_empty_18002", message: "The 'files' list in config file '{0}' is empty." },
+        No_inputs_were_found_in_config_file_0_Specified_include_paths_were_1_and_exclude_paths_were_2: { code: 18003, category: ts.DiagnosticCategory.Error, key: "No_inputs_were_found_in_config_file_0_Specified_include_paths_were_1_and_exclude_paths_were_2_18003", message: "No inputs were found in config file '{0}'. Specified 'include' paths were '{1}' and 'exclude' paths were '{2}'." },
+        Add_missing_super_call: { code: 90001, category: ts.DiagnosticCategory.Message, key: "Add_missing_super_call_90001", message: "Add missing 'super()' call." },
+        Make_super_call_the_first_statement_in_the_constructor: { code: 90002, category: ts.DiagnosticCategory.Message, key: "Make_super_call_the_first_statement_in_the_constructor_90002", message: "Make 'super()' call the first statement in the constructor." },
+        Change_extends_to_implements: { code: 90003, category: ts.DiagnosticCategory.Message, key: "Change_extends_to_implements_90003", message: "Change 'extends' to 'implements'." },
+        Remove_declaration_for_Colon_0: { code: 90004, category: ts.DiagnosticCategory.Message, key: "Remove_declaration_for_Colon_0_90004", message: "Remove declaration for: '{0}'." },
+        Implement_interface_0: { code: 90006, category: ts.DiagnosticCategory.Message, key: "Implement_interface_0_90006", message: "Implement interface '{0}'." },
+        Implement_inherited_abstract_class: { code: 90007, category: ts.DiagnosticCategory.Message, key: "Implement_inherited_abstract_class_90007", message: "Implement inherited abstract class." },
+        Add_this_to_unresolved_variable: { code: 90008, category: ts.DiagnosticCategory.Message, key: "Add_this_to_unresolved_variable_90008", message: "Add 'this.' to unresolved variable." },
+        Adding_a_tsconfig_json_file_will_help_organize_projects_that_contain_both_TypeScript_and_JavaScript_files_Learn_more_at_https_Colon_Slash_Slashaka_ms_Slashtsconfig: { code: 90009, category: ts.DiagnosticCategory.Error, key: "Adding_a_tsconfig_json_file_will_help_organize_projects_that_contain_both_TypeScript_and_JavaScript__90009", message: "Adding a tsconfig.json file will help organize projects that contain both TypeScript and JavaScript files. Learn more at https://aka.ms/tsconfig." },
+        Type_0_is_not_assignable_to_type_1_Two_different_types_with_this_name_exist_but_they_are_unrelated: { code: 90010, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_assignable_to_type_1_Two_different_types_with_this_name_exist_but_they_are_unrelated_90010", message: "Type '{0}' is not assignable to type '{1}'. Two different types with this name exist, but they are unrelated." },
+        Import_0_from_1: { code: 90013, category: ts.DiagnosticCategory.Message, key: "Import_0_from_1_90013", message: "Import {0} from {1}." },
+        Change_0_to_1: { code: 90014, category: ts.DiagnosticCategory.Message, key: "Change_0_to_1_90014", message: "Change {0} to {1}." },
+        Add_0_to_existing_import_declaration_from_1: { code: 90015, category: ts.DiagnosticCategory.Message, key: "Add_0_to_existing_import_declaration_from_1_90015", message: "Add {0} to existing import declaration from {1}." },
+        Declare_property_0: { code: 90016, category: ts.DiagnosticCategory.Message, key: "Declare_property_0_90016", message: "Declare property '{0}'." },
+        Add_index_signature_for_property_0: { code: 90017, category: ts.DiagnosticCategory.Message, key: "Add_index_signature_for_property_0_90017", message: "Add index signature for property '{0}'." },
+        Disable_checking_for_this_file: { code: 90018, category: ts.DiagnosticCategory.Message, key: "Disable_checking_for_this_file_90018", message: "Disable checking for this file." },
+        Ignore_this_error_message: { code: 90019, category: ts.DiagnosticCategory.Message, key: "Ignore_this_error_message_90019", message: "Ignore this error message." },
+        Initialize_property_0_in_the_constructor: { code: 90020, category: ts.DiagnosticCategory.Message, key: "Initialize_property_0_in_the_constructor_90020", message: "Initialize property '{0}' in the constructor." },
+        Initialize_static_property_0: { code: 90021, category: ts.DiagnosticCategory.Message, key: "Initialize_static_property_0_90021", message: "Initialize static property '{0}'." },
+        Change_spelling_to_0: { code: 90022, category: ts.DiagnosticCategory.Message, key: "Change_spelling_to_0_90022", message: "Change spelling to '{0}'." },
+        Declare_method_0: { code: 90023, category: ts.DiagnosticCategory.Message, key: "Declare_method_0_90023", message: "Declare method '{0}'." },
+        Declare_static_method_0: { code: 90024, category: ts.DiagnosticCategory.Message, key: "Declare_static_method_0_90024", message: "Declare static method '{0}'." },
+        Prefix_0_with_an_underscore: { code: 90025, category: ts.DiagnosticCategory.Message, key: "Prefix_0_with_an_underscore_90025", message: "Prefix '{0}' with an underscore." },
+        Convert_function_to_an_ES2015_class: { code: 95001, category: ts.DiagnosticCategory.Message, key: "Convert_function_to_an_ES2015_class_95001", message: "Convert function to an ES2015 class" },
+        Convert_function_0_to_class: { code: 95002, category: ts.DiagnosticCategory.Message, key: "Convert_function_0_to_class_95002", message: "Convert function '{0}' to class" },
+        Octal_literal_types_must_use_ES2015_syntax_Use_the_syntax_0: { code: 8017, category: ts.DiagnosticCategory.Error, key: "Octal_literal_types_must_use_ES2015_syntax_Use_the_syntax_0_8017", message: "Octal literal types must use ES2015 syntax. Use the syntax '{0}'." },
+        Octal_literals_are_not_allowed_in_enums_members_initializer_Use_the_syntax_0: { code: 8018, category: ts.DiagnosticCategory.Error, key: "Octal_literals_are_not_allowed_in_enums_members_initializer_Use_the_syntax_0_8018", message: "Octal literals are not allowed in enums members initializer. Use the syntax '{0}'." },
+        Report_errors_in_js_files: { code: 8019, category: ts.DiagnosticCategory.Message, key: "Report_errors_in_js_files_8019", message: "Report errors in .js files." },
     };
 })(ts || (ts = {}));
-/// <reference path="core.ts"/>
-/// <reference path="diagnosticInformationMap.generated.ts"/>
+/// <reference path="core.ts"/>
+/// <reference path="diagnosticInformationMap.generated.ts"/>
+var ts;
+(function (ts) {
+    /* @internal */
+    function tokenIsIdentifierOrKeyword(token) {
+        return token >= 71 /* Identifier */;
+    }
+    ts.tokenIsIdentifierOrKeyword = tokenIsIdentifierOrKeyword;
+    var textToToken = ts.createMapFromTemplate({
+        "abstract": 117 /* AbstractKeyword */,
+        "any": 119 /* AnyKeyword */,
+        "as": 118 /* AsKeyword */,
+        "boolean": 122 /* BooleanKeyword */,
+        "break": 72 /* BreakKeyword */,
+        "case": 73 /* CaseKeyword */,
+        "catch": 74 /* CatchKeyword */,
+        "class": 75 /* ClassKeyword */,
+        "continue": 77 /* ContinueKeyword */,
+        "const": 76 /* ConstKeyword */,
+        "constructor": 123 /* ConstructorKeyword */,
+        "debugger": 78 /* DebuggerKeyword */,
+        "declare": 124 /* DeclareKeyword */,
+        "default": 79 /* DefaultKeyword */,
+        "delete": 80 /* DeleteKeyword */,
+        "do": 81 /* DoKeyword */,
+        "else": 82 /* ElseKeyword */,
+        "enum": 83 /* EnumKeyword */,
+        "export": 84 /* ExportKeyword */,
+        "extends": 85 /* ExtendsKeyword */,
+        "false": 86 /* FalseKeyword */,
+        "finally": 87 /* FinallyKeyword */,
+        "for": 88 /* ForKeyword */,
+        "from": 140 /* FromKeyword */,
+        "function": 89 /* FunctionKeyword */,
+        "get": 125 /* GetKeyword */,
+        "if": 90 /* IfKeyword */,
+        "implements": 108 /* ImplementsKeyword */,
+        "import": 91 /* ImportKeyword */,
+        "in": 92 /* InKeyword */,
+        "instanceof": 93 /* InstanceOfKeyword */,
+        "interface": 109 /* InterfaceKeyword */,
+        "is": 126 /* IsKeyword */,
+        "keyof": 127 /* KeyOfKeyword */,
+        "let": 110 /* LetKeyword */,
+        "module": 128 /* ModuleKeyword */,
+        "namespace": 129 /* NamespaceKeyword */,
+        "never": 130 /* NeverKeyword */,
+        "new": 94 /* NewKeyword */,
+        "null": 95 /* NullKeyword */,
+        "number": 133 /* NumberKeyword */,
+        "object": 134 /* ObjectKeyword */,
+        "package": 111 /* PackageKeyword */,
+        "private": 112 /* PrivateKeyword */,
+        "protected": 113 /* ProtectedKeyword */,
+        "public": 114 /* PublicKeyword */,
+        "readonly": 131 /* ReadonlyKeyword */,
+        "require": 132 /* RequireKeyword */,
+        "global": 141 /* GlobalKeyword */,
+        "return": 96 /* ReturnKeyword */,
+        "set": 135 /* SetKeyword */,
+        "static": 115 /* StaticKeyword */,
+        "string": 136 /* StringKeyword */,
+        "super": 97 /* SuperKeyword */,
+        "switch": 98 /* SwitchKeyword */,
+        "symbol": 137 /* SymbolKeyword */,
+        "this": 99 /* ThisKeyword */,
+        "throw": 100 /* ThrowKeyword */,
+        "true": 101 /* TrueKeyword */,
+        "try": 102 /* TryKeyword */,
+        "type": 138 /* TypeKeyword */,
+        "typeof": 103 /* TypeOfKeyword */,
+        "undefined": 139 /* UndefinedKeyword */,
+        "var": 104 /* VarKeyword */,
+        "void": 105 /* VoidKeyword */,
+        "while": 106 /* WhileKeyword */,
+        "with": 107 /* WithKeyword */,
+        "yield": 116 /* YieldKeyword */,
+        "async": 120 /* AsyncKeyword */,
+        "await": 121 /* AwaitKeyword */,
+        "of": 142 /* OfKeyword */,
+        "{": 17 /* OpenBraceToken */,
+        "}": 18 /* CloseBraceToken */,
+        "(": 19 /* OpenParenToken */,
+        ")": 20 /* CloseParenToken */,
+        "[": 21 /* OpenBracketToken */,
+        "]": 22 /* CloseBracketToken */,
+        ".": 23 /* DotToken */,
+        "...": 24 /* DotDotDotToken */,
+        ";": 25 /* SemicolonToken */,
+        ",": 26 /* CommaToken */,
+        "<": 27 /* LessThanToken */,
+        ">": 29 /* GreaterThanToken */,
+        "<=": 30 /* LessThanEqualsToken */,
+        ">=": 31 /* GreaterThanEqualsToken */,
+        "==": 32 /* EqualsEqualsToken */,
+        "!=": 33 /* ExclamationEqualsToken */,
+        "===": 34 /* EqualsEqualsEqualsToken */,
+        "!==": 35 /* ExclamationEqualsEqualsToken */,
+        "=>": 36 /* EqualsGreaterThanToken */,
+        "+": 37 /* PlusToken */,
+        "-": 38 /* MinusToken */,
+        "**": 40 /* AsteriskAsteriskToken */,
+        "*": 39 /* AsteriskToken */,
+        "/": 41 /* SlashToken */,
+        "%": 42 /* PercentToken */,
+        "++": 43 /* PlusPlusToken */,
+        "--": 44 /* MinusMinusToken */,
+        "<<": 45 /* LessThanLessThanToken */,
+        "</": 28 /* LessThanSlashToken */,
+        ">>": 46 /* GreaterThanGreaterThanToken */,
+        ">>>": 47 /* GreaterThanGreaterThanGreaterThanToken */,
+        "&": 48 /* AmpersandToken */,
+        "|": 49 /* BarToken */,
+        "^": 50 /* CaretToken */,
+        "!": 51 /* ExclamationToken */,
+        "~": 52 /* TildeToken */,
+        "&&": 53 /* AmpersandAmpersandToken */,
+        "||": 54 /* BarBarToken */,
+        "?": 55 /* QuestionToken */,
+        ":": 56 /* ColonToken */,
+        "=": 58 /* EqualsToken */,
+        "+=": 59 /* PlusEqualsToken */,
+        "-=": 60 /* MinusEqualsToken */,
+        "*=": 61 /* AsteriskEqualsToken */,
+        "**=": 62 /* AsteriskAsteriskEqualsToken */,
+        "/=": 63 /* SlashEqualsToken */,
+        "%=": 64 /* PercentEqualsToken */,
+        "<<=": 65 /* LessThanLessThanEqualsToken */,
+        ">>=": 66 /* GreaterThanGreaterThanEqualsToken */,
+        ">>>=": 67 /* GreaterThanGreaterThanGreaterThanEqualsToken */,
+        "&=": 68 /* AmpersandEqualsToken */,
+        "|=": 69 /* BarEqualsToken */,
+        "^=": 70 /* CaretEqualsToken */,
+        "@": 57 /* AtToken */,
+    });
+    /*
+        As per ECMAScript Language Specification 3th Edition, Section 7.6: Identifiers
+        IdentifierStart ::
+            Can contain Unicode 3.0.0  categories:
+            Uppercase letter (Lu),
+            Lowercase letter (Ll),
+            Titlecase letter (Lt),
+            Modifier letter (Lm),
+            Other letter (Lo), or
+            Letter number (Nl).
+        IdentifierPart :: =
+            Can contain IdentifierStart + Unicode 3.0.0  categories:
+            Non-spacing mark (Mn),
+            Combining spacing mark (Mc),
+            Decimal number (Nd), or
+            Connector punctuation (Pc).
+
+        Codepoint ranges for ES3 Identifiers are extracted from the Unicode 3.0.0 specification at:
+        http://www.unicode.org/Public/3.0-Update/UnicodeData-3.0.0.txt
+    */
+    var unicodeES3IdentifierStart = [170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 543, 546, 563, 592, 685, 688, 696, 699, 705, 720, 721, 736, 740, 750, 750, 890, 890, 902, 902, 904, 906, 908, 908, 910, 929, 931, 974, 976, 983, 986, 1011, 1024, 1153, 1164, 1220, 1223, 1224, 1227, 1228, 1232, 1269, 1272, 1273, 1329, 1366, 1369, 1369, 1377, 1415, 1488, 1514, 1520, 1522, 1569, 1594, 1600, 1610, 1649, 1747, 1749, 1749, 1765, 1766, 1786, 1788, 1808, 1808, 1810, 1836, 1920, 1957, 2309, 2361, 2365, 2365, 2384, 2384, 2392, 2401, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482, 2482, 2486, 2489, 2524, 2525, 2527, 2529, 2544, 2545, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613, 2614, 2616, 2617, 2649, 2652, 2654, 2654, 2674, 2676, 2693, 2699, 2701, 2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2749, 2749, 2768, 2768, 2784, 2784, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2870, 2873, 2877, 2877, 2908, 2909, 2911, 2913, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986, 2990, 2997, 2999, 3001, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3123, 3125, 3129, 3168, 3169, 3205, 3212, 3214, 3216, 3218, 3240, 3242, 3251, 3253, 3257, 3294, 3294, 3296, 3297, 3333, 3340, 3342, 3344, 3346, 3368, 3370, 3385, 3424, 3425, 3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3585, 3632, 3634, 3635, 3648, 3654, 3713, 3714, 3716, 3716, 3719, 3720, 3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757, 3760, 3762, 3763, 3773, 3773, 3776, 3780, 3782, 3782, 3804, 3805, 3840, 3840, 3904, 3911, 3913, 3946, 3976, 3979, 4096, 4129, 4131, 4135, 4137, 4138, 4176, 4181, 4256, 4293, 4304, 4342, 4352, 4441, 4447, 4514, 4520, 4601, 4608, 4614, 4616, 4678, 4680, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4742, 4744, 4744, 4746, 4749, 4752, 4782, 4784, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4814, 4816, 4822, 4824, 4846, 4848, 4878, 4880, 4880, 4882, 4885, 4888, 4894, 4896, 4934, 4936, 4954, 5024, 5108, 5121, 5740, 5743, 5750, 5761, 5786, 5792, 5866, 6016, 6067, 6176, 6263, 6272, 6312, 7680, 7835, 7840, 7929, 7936, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8319, 8319, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8473, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8497, 8499, 8505, 8544, 8579, 12293, 12295, 12321, 12329, 12337, 12341, 12344, 12346, 12353, 12436, 12445, 12446, 12449, 12538, 12540, 12542, 12549, 12588, 12593, 12686, 12704, 12727, 13312, 19893, 19968, 40869, 40960, 42124, 44032, 55203, 63744, 64045, 64256, 64262, 64275, 64279, 64285, 64285, 64287, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65136, 65138, 65140, 65140, 65142, 65276, 65313, 65338, 65345, 65370, 65382, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500,];
+    var unicodeES3IdentifierPart = [170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 543, 546, 563, 592, 685, 688, 696, 699, 705, 720, 721, 736, 740, 750, 750, 768, 846, 864, 866, 890, 890, 902, 902, 904, 906, 908, 908, 910, 929, 931, 974, 976, 983, 986, 1011, 1024, 1153, 1155, 1158, 1164, 1220, 1223, 1224, 1227, 1228, 1232, 1269, 1272, 1273, 1329, 1366, 1369, 1369, 1377, 1415, 1425, 1441, 1443, 1465, 1467, 1469, 1471, 1471, 1473, 1474, 1476, 1476, 1488, 1514, 1520, 1522, 1569, 1594, 1600, 1621, 1632, 1641, 1648, 1747, 1749, 1756, 1759, 1768, 1770, 1773, 1776, 1788, 1808, 1836, 1840, 1866, 1920, 1968, 2305, 2307, 2309, 2361, 2364, 2381, 2384, 2388, 2392, 2403, 2406, 2415, 2433, 2435, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482, 2482, 2486, 2489, 2492, 2492, 2494, 2500, 2503, 2504, 2507, 2509, 2519, 2519, 2524, 2525, 2527, 2531, 2534, 2545, 2562, 2562, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613, 2614, 2616, 2617, 2620, 2620, 2622, 2626, 2631, 2632, 2635, 2637, 2649, 2652, 2654, 2654, 2662, 2676, 2689, 2691, 2693, 2699, 2701, 2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2748, 2757, 2759, 2761, 2763, 2765, 2768, 2768, 2784, 2784, 2790, 2799, 2817, 2819, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2870, 2873, 2876, 2883, 2887, 2888, 2891, 2893, 2902, 2903, 2908, 2909, 2911, 2913, 2918, 2927, 2946, 2947, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986, 2990, 2997, 2999, 3001, 3006, 3010, 3014, 3016, 3018, 3021, 3031, 3031, 3047, 3055, 3073, 3075, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3123, 3125, 3129, 3134, 3140, 3142, 3144, 3146, 3149, 3157, 3158, 3168, 3169, 3174, 3183, 3202, 3203, 3205, 3212, 3214, 3216, 3218, 3240, 3242, 3251, 3253, 3257, 3262, 3268, 3270, 3272, 3274, 3277, 3285, 3286, 3294, 3294, 3296, 3297, 3302, 3311, 3330, 3331, 3333, 3340, 3342, 3344, 3346, 3368, 3370, 3385, 3390, 3395, 3398, 3400, 3402, 3405, 3415, 3415, 3424, 3425, 3430, 3439, 3458, 3459, 3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3530, 3530, 3535, 3540, 3542, 3542, 3544, 3551, 3570, 3571, 3585, 3642, 3648, 3662, 3664, 3673, 3713, 3714, 3716, 3716, 3719, 3720, 3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757, 3769, 3771, 3773, 3776, 3780, 3782, 3782, 3784, 3789, 3792, 3801, 3804, 3805, 3840, 3840, 3864, 3865, 3872, 3881, 3893, 3893, 3895, 3895, 3897, 3897, 3902, 3911, 3913, 3946, 3953, 3972, 3974, 3979, 3984, 3991, 3993, 4028, 4038, 4038, 4096, 4129, 4131, 4135, 4137, 4138, 4140, 4146, 4150, 4153, 4160, 4169, 4176, 4185, 4256, 4293, 4304, 4342, 4352, 4441, 4447, 4514, 4520, 4601, 4608, 4614, 4616, 4678, 4680, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4742, 4744, 4744, 4746, 4749, 4752, 4782, 4784, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4814, 4816, 4822, 4824, 4846, 4848, 4878, 4880, 4880, 4882, 4885, 4888, 4894, 4896, 4934, 4936, 4954, 4969, 4977, 5024, 5108, 5121, 5740, 5743, 5750, 5761, 5786, 5792, 5866, 6016, 6099, 6112, 6121, 6160, 6169, 6176, 6263, 6272, 6313, 7680, 7835, 7840, 7929, 7936, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8255, 8256, 8319, 8319, 8400, 8412, 8417, 8417, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8473, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8497, 8499, 8505, 8544, 8579, 12293, 12295, 12321, 12335, 12337, 12341, 12344, 12346, 12353, 12436, 12441, 12442, 12445, 12446, 12449, 12542, 12549, 12588, 12593, 12686, 12704, 12727, 13312, 19893, 19968, 40869, 40960, 42124, 44032, 55203, 63744, 64045, 64256, 64262, 64275, 64279, 64285, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65056, 65059, 65075, 65076, 65101, 65103, 65136, 65138, 65140, 65140, 65142, 65276, 65296, 65305, 65313, 65338, 65343, 65343, 65345, 65370, 65381, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500,];
+    /*
+        As per ECMAScript Language Specification 5th Edition, Section 7.6: ISyntaxToken Names and Identifiers
+        IdentifierStart ::
+            Can contain Unicode 6.2  categories:
+            Uppercase letter (Lu),
+            Lowercase letter (Ll),
+            Titlecase letter (Lt),
+            Modifier letter (Lm),
+            Other letter (Lo), or
+            Letter number (Nl).
+        IdentifierPart ::
+            Can contain IdentifierStart + Unicode 6.2  categories:
+            Non-spacing mark (Mn),
+            Combining spacing mark (Mc),
+            Decimal number (Nd),
+            Connector punctuation (Pc),
+            <ZWNJ>, or
+            <ZWJ>.
+
+        Codepoint ranges for ES5 Identifiers are extracted from the Unicode 6.2 specification at:
+        http://www.unicode.org/Public/6.2.0/ucd/UnicodeData.txt
+    */
+    var unicodeES5IdentifierStart = [170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 705, 710, 721, 736, 740, 748, 748, 750, 750, 880, 884, 886, 887, 890, 893, 902, 902, 904, 906, 908, 908, 910, 929, 931, 1013, 1015, 1153, 1162, 1319, 1329, 1366, 1369, 1369, 1377, 1415, 1488, 1514, 1520, 1522, 1568, 1610, 1646, 1647, 1649, 1747, 1749, 1749, 1765, 1766, 1774, 1775, 1786, 1788, 1791, 1791, 1808, 1808, 1810, 1839, 1869, 1957, 1969, 1969, 1994, 2026, 2036, 2037, 2042, 2042, 2048, 2069, 2074, 2074, 2084, 2084, 2088, 2088, 2112, 2136, 2208, 2208, 2210, 2220, 2308, 2361, 2365, 2365, 2384, 2384, 2392, 2401, 2417, 2423, 2425, 2431, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482, 2482, 2486, 2489, 2493, 2493, 2510, 2510, 2524, 2525, 2527, 2529, 2544, 2545, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613, 2614, 2616, 2617, 2649, 2652, 2654, 2654, 2674, 2676, 2693, 2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2749, 2749, 2768, 2768, 2784, 2785, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2869, 2873, 2877, 2877, 2908, 2909, 2911, 2913, 2929, 2929, 2947, 2947, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986, 2990, 3001, 3024, 3024, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3123, 3125, 3129, 3133, 3133, 3160, 3161, 3168, 3169, 3205, 3212, 3214, 3216, 3218, 3240, 3242, 3251, 3253, 3257, 3261, 3261, 3294, 3294, 3296, 3297, 3313, 3314, 3333, 3340, 3342, 3344, 3346, 3386, 3389, 3389, 3406, 3406, 3424, 3425, 3450, 3455, 3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3585, 3632, 3634, 3635, 3648, 3654, 3713, 3714, 3716, 3716, 3719, 3720, 3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757, 3760, 3762, 3763, 3773, 3773, 3776, 3780, 3782, 3782, 3804, 3807, 3840, 3840, 3904, 3911, 3913, 3948, 3976, 3980, 4096, 4138, 4159, 4159, 4176, 4181, 4186, 4189, 4193, 4193, 4197, 4198, 4206, 4208, 4213, 4225, 4238, 4238, 4256, 4293, 4295, 4295, 4301, 4301, 4304, 4346, 4348, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4744, 4746, 4749, 4752, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4822, 4824, 4880, 4882, 4885, 4888, 4954, 4992, 5007, 5024, 5108, 5121, 5740, 5743, 5759, 5761, 5786, 5792, 5866, 5870, 5872, 5888, 5900, 5902, 5905, 5920, 5937, 5952, 5969, 5984, 5996, 5998, 6000, 6016, 6067, 6103, 6103, 6108, 6108, 6176, 6263, 6272, 6312, 6314, 6314, 6320, 6389, 6400, 6428, 6480, 6509, 6512, 6516, 6528, 6571, 6593, 6599, 6656, 6678, 6688, 6740, 6823, 6823, 6917, 6963, 6981, 6987, 7043, 7072, 7086, 7087, 7098, 7141, 7168, 7203, 7245, 7247, 7258, 7293, 7401, 7404, 7406, 7409, 7413, 7414, 7424, 7615, 7680, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8305, 8305, 8319, 8319, 8336, 8348, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8473, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8505, 8508, 8511, 8517, 8521, 8526, 8526, 8544, 8584, 11264, 11310, 11312, 11358, 11360, 11492, 11499, 11502, 11506, 11507, 11520, 11557, 11559, 11559, 11565, 11565, 11568, 11623, 11631, 11631, 11648, 11670, 11680, 11686, 11688, 11694, 11696, 11702, 11704, 11710, 11712, 11718, 11720, 11726, 11728, 11734, 11736, 11742, 11823, 11823, 12293, 12295, 12321, 12329, 12337, 12341, 12344, 12348, 12353, 12438, 12445, 12447, 12449, 12538, 12540, 12543, 12549, 12589, 12593, 12686, 12704, 12730, 12784, 12799, 13312, 19893, 19968, 40908, 40960, 42124, 42192, 42237, 42240, 42508, 42512, 42527, 42538, 42539, 42560, 42606, 42623, 42647, 42656, 42735, 42775, 42783, 42786, 42888, 42891, 42894, 42896, 42899, 42912, 42922, 43000, 43009, 43011, 43013, 43015, 43018, 43020, 43042, 43072, 43123, 43138, 43187, 43250, 43255, 43259, 43259, 43274, 43301, 43312, 43334, 43360, 43388, 43396, 43442, 43471, 43471, 43520, 43560, 43584, 43586, 43588, 43595, 43616, 43638, 43642, 43642, 43648, 43695, 43697, 43697, 43701, 43702, 43705, 43709, 43712, 43712, 43714, 43714, 43739, 43741, 43744, 43754, 43762, 43764, 43777, 43782, 43785, 43790, 43793, 43798, 43808, 43814, 43816, 43822, 43968, 44002, 44032, 55203, 55216, 55238, 55243, 55291, 63744, 64109, 64112, 64217, 64256, 64262, 64275, 64279, 64285, 64285, 64287, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65136, 65140, 65142, 65276, 65313, 65338, 65345, 65370, 65382, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500,];
+    var unicodeES5IdentifierPart = [170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 705, 710, 721, 736, 740, 748, 748, 750, 750, 768, 884, 886, 887, 890, 893, 902, 902, 904, 906, 908, 908, 910, 929, 931, 1013, 1015, 1153, 1155, 1159, 1162, 1319, 1329, 1366, 1369, 1369, 1377, 1415, 1425, 1469, 1471, 1471, 1473, 1474, 1476, 1477, 1479, 1479, 1488, 1514, 1520, 1522, 1552, 1562, 1568, 1641, 1646, 1747, 1749, 1756, 1759, 1768, 1770, 1788, 1791, 1791, 1808, 1866, 1869, 1969, 1984, 2037, 2042, 2042, 2048, 2093, 2112, 2139, 2208, 2208, 2210, 2220, 2276, 2302, 2304, 2403, 2406, 2415, 2417, 2423, 2425, 2431, 2433, 2435, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482, 2482, 2486, 2489, 2492, 2500, 2503, 2504, 2507, 2510, 2519, 2519, 2524, 2525, 2527, 2531, 2534, 2545, 2561, 2563, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613, 2614, 2616, 2617, 2620, 2620, 2622, 2626, 2631, 2632, 2635, 2637, 2641, 2641, 2649, 2652, 2654, 2654, 2662, 2677, 2689, 2691, 2693, 2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2748, 2757, 2759, 2761, 2763, 2765, 2768, 2768, 2784, 2787, 2790, 2799, 2817, 2819, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2869, 2873, 2876, 2884, 2887, 2888, 2891, 2893, 2902, 2903, 2908, 2909, 2911, 2915, 2918, 2927, 2929, 2929, 2946, 2947, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986, 2990, 3001, 3006, 3010, 3014, 3016, 3018, 3021, 3024, 3024, 3031, 3031, 3046, 3055, 3073, 3075, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3123, 3125, 3129, 3133, 3140, 3142, 3144, 3146, 3149, 3157, 3158, 3160, 3161, 3168, 3171, 3174, 3183, 3202, 3203, 3205, 3212, 3214, 3216, 3218, 3240, 3242, 3251, 3253, 3257, 3260, 3268, 3270, 3272, 3274, 3277, 3285, 3286, 3294, 3294, 3296, 3299, 3302, 3311, 3313, 3314, 3330, 3331, 3333, 3340, 3342, 3344, 3346, 3386, 3389, 3396, 3398, 3400, 3402, 3406, 3415, 3415, 3424, 3427, 3430, 3439, 3450, 3455, 3458, 3459, 3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3530, 3530, 3535, 3540, 3542, 3542, 3544, 3551, 3570, 3571, 3585, 3642, 3648, 3662, 3664, 3673, 3713, 3714, 3716, 3716, 3719, 3720, 3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757, 3769, 3771, 3773, 3776, 3780, 3782, 3782, 3784, 3789, 3792, 3801, 3804, 3807, 3840, 3840, 3864, 3865, 3872, 3881, 3893, 3893, 3895, 3895, 3897, 3897, 3902, 3911, 3913, 3948, 3953, 3972, 3974, 3991, 3993, 4028, 4038, 4038, 4096, 4169, 4176, 4253, 4256, 4293, 4295, 4295, 4301, 4301, 4304, 4346, 4348, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4744, 4746, 4749, 4752, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4822, 4824, 4880, 4882, 4885, 4888, 4954, 4957, 4959, 4992, 5007, 5024, 5108, 5121, 5740, 5743, 5759, 5761, 5786, 5792, 5866, 5870, 5872, 5888, 5900, 5902, 5908, 5920, 5940, 5952, 5971, 5984, 5996, 5998, 6000, 6002, 6003, 6016, 6099, 6103, 6103, 6108, 6109, 6112, 6121, 6155, 6157, 6160, 6169, 6176, 6263, 6272, 6314, 6320, 6389, 6400, 6428, 6432, 6443, 6448, 6459, 6470, 6509, 6512, 6516, 6528, 6571, 6576, 6601, 6608, 6617, 6656, 6683, 6688, 6750, 6752, 6780, 6783, 6793, 6800, 6809, 6823, 6823, 6912, 6987, 6992, 7001, 7019, 7027, 7040, 7155, 7168, 7223, 7232, 7241, 7245, 7293, 7376, 7378, 7380, 7414, 7424, 7654, 7676, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8204, 8205, 8255, 8256, 8276, 8276, 8305, 8305, 8319, 8319, 8336, 8348, 8400, 8412, 8417, 8417, 8421, 8432, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8473, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8505, 8508, 8511, 8517, 8521, 8526, 8526, 8544, 8584, 11264, 11310, 11312, 11358, 11360, 11492, 11499, 11507, 11520, 11557, 11559, 11559, 11565, 11565, 11568, 11623, 11631, 11631, 11647, 11670, 11680, 11686, 11688, 11694, 11696, 11702, 11704, 11710, 11712, 11718, 11720, 11726, 11728, 11734, 11736, 11742, 11744, 11775, 11823, 11823, 12293, 12295, 12321, 12335, 12337, 12341, 12344, 12348, 12353, 12438, 12441, 12442, 12445, 12447, 12449, 12538, 12540, 12543, 12549, 12589, 12593, 12686, 12704, 12730, 12784, 12799, 13312, 19893, 19968, 40908, 40960, 42124, 42192, 42237, 42240, 42508, 42512, 42539, 42560, 42607, 42612, 42621, 42623, 42647, 42655, 42737, 42775, 42783, 42786, 42888, 42891, 42894, 42896, 42899, 42912, 42922, 43000, 43047, 43072, 43123, 43136, 43204, 43216, 43225, 43232, 43255, 43259, 43259, 43264, 43309, 43312, 43347, 43360, 43388, 43392, 43456, 43471, 43481, 43520, 43574, 43584, 43597, 43600, 43609, 43616, 43638, 43642, 43643, 43648, 43714, 43739, 43741, 43744, 43759, 43762, 43766, 43777, 43782, 43785, 43790, 43793, 43798, 43808, 43814, 43816, 43822, 43968, 44010, 44012, 44013, 44016, 44025, 44032, 55203, 55216, 55238, 55243, 55291, 63744, 64109, 64112, 64217, 64256, 64262, 64275, 64279, 64285, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65024, 65039, 65056, 65062, 65075, 65076, 65101, 65103, 65136, 65140, 65142, 65276, 65296, 65305, 65313, 65338, 65343, 65343, 65345, 65370, 65382, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500,];
+    function lookupInUnicodeMap(code, map) {
+        // Bail out quickly if it couldn't possibly be in the map.
+        if (code < map[0]) {
+            return false;
+        }
+        // Perform binary search in one of the Unicode range maps
+        var lo = 0;
+        var hi = map.length;
+        var mid;
+        while (lo + 1 < hi) {
+            mid = lo + (hi - lo) / 2;
+            // mid has to be even to catch a range's beginning
+            mid -= mid % 2;
+            if (map[mid] <= code && code <= map[mid + 1]) {
+                return true;
+            }
+            if (code < map[mid]) {
+                hi = mid;
+            }
+            else {
+                lo = mid + 2;
+            }
+        }
+        return false;
+    }
+    /* @internal */ function isUnicodeIdentifierStart(code, languageVersion) {
+        return languageVersion >= 1 /* ES5 */ ?
+            lookupInUnicodeMap(code, unicodeES5IdentifierStart) :
+            lookupInUnicodeMap(code, unicodeES3IdentifierStart);
+    }
+    ts.isUnicodeIdentifierStart = isUnicodeIdentifierStart;
+    function isUnicodeIdentifierPart(code, languageVersion) {
+        return languageVersion >= 1 /* ES5 */ ?
+            lookupInUnicodeMap(code, unicodeES5IdentifierPart) :
+            lookupInUnicodeMap(code, unicodeES3IdentifierPart);
+    }
+    function makeReverseMap(source) {
+        var result = [];
+        source.forEach(function (value, name) {
+            result[value] = name;
+        });
+        return result;
+    }
+    var tokenStrings = makeReverseMap(textToToken);
+    function tokenToString(t) {
+        return tokenStrings[t];
+    }
+    ts.tokenToString = tokenToString;
+    /* @internal */
+    function stringToToken(s) {
+        return textToToken.get(s);
+    }
+    ts.stringToToken = stringToToken;
+    /* @internal */
+    function computeLineStarts(text) {
+        var result = new Array();
+        var pos = 0;
+        var lineStart = 0;
+        while (pos < text.length) {
+            var ch = text.charCodeAt(pos);
+            pos++;
+            switch (ch) {
+                case 13 /* carriageReturn */:
+                    if (text.charCodeAt(pos) === 10 /* lineFeed */) {
+                        pos++;
+                    }
+                // falls through
+                case 10 /* lineFeed */:
+                    result.push(lineStart);
+                    lineStart = pos;
+                    break;
+                default:
+                    if (ch > 127 /* maxAsciiCharacter */ && isLineBreak(ch)) {
+                        result.push(lineStart);
+                        lineStart = pos;
+                    }
+                    break;
+            }
+        }
+        result.push(lineStart);
+        return result;
+    }
+    ts.computeLineStarts = computeLineStarts;
+    function getPositionOfLineAndCharacter(sourceFile, line, character) {
+        return computePositionOfLineAndCharacter(getLineStarts(sourceFile), line, character);
+    }
+    ts.getPositionOfLineAndCharacter = getPositionOfLineAndCharacter;
+    /* @internal */
+    function computePositionOfLineAndCharacter(lineStarts, line, character) {
+        ts.Debug.assert(line >= 0 && line < lineStarts.length);
+        return lineStarts[line] + character;
+    }
+    ts.computePositionOfLineAndCharacter = computePositionOfLineAndCharacter;
+    /* @internal */
+    function getLineStarts(sourceFile) {
+        return sourceFile.lineMap || (sourceFile.lineMap = computeLineStarts(sourceFile.text));
+    }
+    ts.getLineStarts = getLineStarts;
+    /* @internal */
+    /**
+     * We assume the first line starts at position 0 and 'position' is non-negative.
+     */
+    function computeLineAndCharacterOfPosition(lineStarts, position) {
+        var lineNumber = ts.binarySearch(lineStarts, position);
+        if (lineNumber < 0) {
+            // If the actual position was not found,
+            // the binary search returns the 2's-complement of the next line start
+            // e.g. if the line starts at [5, 10, 23, 80] and the position requested was 20
+            // then the search will return -2.
+            //
+            // We want the index of the previous line start, so we subtract 1.
+            // Review 2's-complement if this is confusing.
+            lineNumber = ~lineNumber - 1;
+            ts.Debug.assert(lineNumber !== -1, "position cannot precede the beginning of the file");
+        }
+        return {
+            line: lineNumber,
+            character: position - lineStarts[lineNumber]
+        };
+    }
+    ts.computeLineAndCharacterOfPosition = computeLineAndCharacterOfPosition;
+    function getLineAndCharacterOfPosition(sourceFile, position) {
+        return computeLineAndCharacterOfPosition(getLineStarts(sourceFile), position);
+    }
+    ts.getLineAndCharacterOfPosition = getLineAndCharacterOfPosition;
+    function isWhiteSpaceLike(ch) {
+        return isWhiteSpaceSingleLine(ch) || isLineBreak(ch);
+    }
+    ts.isWhiteSpaceLike = isWhiteSpaceLike;
+    /** Does not include line breaks. For that, see isWhiteSpaceLike. */
+    function isWhiteSpaceSingleLine(ch) {
+        // Note: nextLine is in the Zs space, and should be considered to be a whitespace.
+        // It is explicitly not a line-break as it isn't in the exact set specified by EcmaScript.
+        return ch === 32 /* space */ ||
+            ch === 9 /* tab */ ||
+            ch === 11 /* verticalTab */ ||
+            ch === 12 /* formFeed */ ||
+            ch === 160 /* nonBreakingSpace */ ||
+            ch === 133 /* nextLine */ ||
+            ch === 5760 /* ogham */ ||
+            ch >= 8192 /* enQuad */ && ch <= 8203 /* zeroWidthSpace */ ||
+            ch === 8239 /* narrowNoBreakSpace */ ||
+            ch === 8287 /* mathematicalSpace */ ||
+            ch === 12288 /* ideographicSpace */ ||
+            ch === 65279 /* byteOrderMark */;
+    }
+    ts.isWhiteSpaceSingleLine = isWhiteSpaceSingleLine;
+    function isLineBreak(ch) {
+        // ES5 7.3:
+        // The ECMAScript line terminator characters are listed in Table 3.
+        //     Table 3: Line Terminator Characters
+        //     Code Unit Value     Name                    Formal Name
+        //     \u000A              Line Feed               <LF>
+        //     \u000D              Carriage Return         <CR>
+        //     \u2028              Line separator          <LS>
+        //     \u2029              Paragraph separator     <PS>
+        // Only the characters in Table 3 are treated as line terminators. Other new line or line
+        // breaking characters are treated as white space but not as line terminators.
+        return ch === 10 /* lineFeed */ ||
+            ch === 13 /* carriageReturn */ ||
+            ch === 8232 /* lineSeparator */ ||
+            ch === 8233 /* paragraphSeparator */;
+    }
+    ts.isLineBreak = isLineBreak;
+    function isDigit(ch) {
+        return ch >= 48 /* _0 */ && ch <= 57 /* _9 */;
+    }
+    /* @internal */
+    function isOctalDigit(ch) {
+        return ch >= 48 /* _0 */ && ch <= 55 /* _7 */;
+    }
+    ts.isOctalDigit = isOctalDigit;
+    function couldStartTrivia(text, pos) {
+        // Keep in sync with skipTrivia
+        var ch = text.charCodeAt(pos);
+        switch (ch) {
+            case 13 /* carriageReturn */:
+            case 10 /* lineFeed */:
+            case 9 /* tab */:
+            case 11 /* verticalTab */:
+            case 12 /* formFeed */:
+            case 32 /* space */:
+            case 47 /* slash */:
+            // starts of normal trivia
+            case 60 /* lessThan */:
+            case 124 /* bar */:
+            case 61 /* equals */:
+            case 62 /* greaterThan */:
+                // Starts of conflict marker trivia
+                return true;
+            case 35 /* hash */:
+                // Only if its the beginning can we have #! trivia
+                return pos === 0;
+            default:
+                return ch > 127 /* maxAsciiCharacter */;
+        }
+    }
+    ts.couldStartTrivia = couldStartTrivia;
+    /* @internal */
+    function skipTrivia(text, pos, stopAfterLineBreak, stopAtComments) {
+        if (stopAtComments === void 0) { stopAtComments = false; }
+        if (ts.positionIsSynthesized(pos)) {
+            return pos;
+        }
+        // Keep in sync with couldStartTrivia
+        while (true) {
+            var ch = text.charCodeAt(pos);
+            switch (ch) {
+                case 13 /* carriageReturn */:
+                    if (text.charCodeAt(pos + 1) === 10 /* lineFeed */) {
+                        pos++;
+                    }
+                // falls through
+                case 10 /* lineFeed */:
+                    pos++;
+                    if (stopAfterLineBreak) {
+                        return pos;
+                    }
+                    continue;
+                case 9 /* tab */:
+                case 11 /* verticalTab */:
+                case 12 /* formFeed */:
+                case 32 /* space */:
+                    pos++;
+                    continue;
+                case 47 /* slash */:
+                    if (stopAtComments) {
+                        break;
+                    }
+                    if (text.charCodeAt(pos + 1) === 47 /* slash */) {
+                        pos += 2;
+                        while (pos < text.length) {
+                            if (isLineBreak(text.charCodeAt(pos))) {
+                                break;
+                            }
+                            pos++;
+                        }
+                        continue;
+                    }
+                    if (text.charCodeAt(pos + 1) === 42 /* asterisk */) {
+                        pos += 2;
+                        while (pos < text.length) {
+                            if (text.charCodeAt(pos) === 42 /* asterisk */ && text.charCodeAt(pos + 1) === 47 /* slash */) {
+                                pos += 2;
+                                break;
+                            }
+                            pos++;
+                        }
+                        continue;
+                    }
+                    break;
+                case 60 /* lessThan */:
+                case 124 /* bar */:
+                case 61 /* equals */:
+                case 62 /* greaterThan */:
+                    if (isConflictMarkerTrivia(text, pos)) {
+                        pos = scanConflictMarkerTrivia(text, pos);
+                        continue;
+                    }
+                    break;
+                case 35 /* hash */:
+                    if (pos === 0 && isShebangTrivia(text, pos)) {
+                        pos = scanShebangTrivia(text, pos);
+                        continue;
+                    }
+                    break;
+                default:
+                    if (ch > 127 /* maxAsciiCharacter */ && (isWhiteSpaceLike(ch))) {
+                        pos++;
+                        continue;
+                    }
+                    break;
+            }
+            return pos;
+        }
+    }
+    ts.skipTrivia = skipTrivia;
+    // All conflict markers consist of the same character repeated seven times.  If it is
+    // a <<<<<<< or >>>>>>> marker then it is also followed by a space.
+    var mergeConflictMarkerLength = "<<<<<<<".length;
+    function isConflictMarkerTrivia(text, pos) {
+        ts.Debug.assert(pos >= 0);
+        // Conflict markers must be at the start of a line.
+        if (pos === 0 || isLineBreak(text.charCodeAt(pos - 1))) {
+            var ch = text.charCodeAt(pos);
+            if ((pos + mergeConflictMarkerLength) < text.length) {
+                for (var i = 0; i < mergeConflictMarkerLength; i++) {
+                    if (text.charCodeAt(pos + i) !== ch) {
+                        return false;
+                    }
+                }
+                return ch === 61 /* equals */ ||
+                    text.charCodeAt(pos + mergeConflictMarkerLength) === 32 /* space */;
+            }
+        }
+        return false;
+    }
+    function scanConflictMarkerTrivia(text, pos, error) {
+        if (error) {
+            error(ts.Diagnostics.Merge_conflict_marker_encountered, mergeConflictMarkerLength);
+        }
+        var ch = text.charCodeAt(pos);
+        var len = text.length;
+        if (ch === 60 /* lessThan */ || ch === 62 /* greaterThan */) {
+            while (pos < len && !isLineBreak(text.charCodeAt(pos))) {
+                pos++;
+            }
+        }
+        else {
+            ts.Debug.assert(ch === 124 /* bar */ || ch === 61 /* equals */);
+            // Consume everything from the start of a ||||||| or ======= marker to the start
+            // of the next ======= or >>>>>>> marker.
+            while (pos < len) {
+                var currentChar = text.charCodeAt(pos);
+                if ((currentChar === 61 /* equals */ || currentChar === 62 /* greaterThan */) && currentChar !== ch && isConflictMarkerTrivia(text, pos)) {
+                    break;
+                }
+                pos++;
+            }
+        }
+        return pos;
+    }
+    var shebangTriviaRegex = /^#!.*/;
+    function isShebangTrivia(text, pos) {
+        // Shebangs check must only be done at the start of the file
+        ts.Debug.assert(pos === 0);
+        return shebangTriviaRegex.test(text);
+    }
+    function scanShebangTrivia(text, pos) {
+        var shebang = shebangTriviaRegex.exec(text)[0];
+        pos = pos + shebang.length;
+        return pos;
+    }
+    /**
+     * Invokes a callback for each comment range following the provided position.
+     *
+     * Single-line comment ranges include the leading double-slash characters but not the ending
+     * line break. Multi-line comment ranges include the leading slash-asterisk and trailing
+     * asterisk-slash characters.
+     *
+     * @param reduce If true, accumulates the result of calling the callback in a fashion similar
+     *      to reduceLeft. If false, iteration stops when the callback returns a truthy value.
+     * @param text The source text to scan.
+     * @param pos The position at which to start scanning.
+     * @param trailing If false, whitespace is skipped until the first line break and comments
+     *      between that location and the next token are returned. If true, comments occurring
+     *      between the given position and the next line break are returned.
+     * @param cb The callback to execute as each comment range is encountered.
+     * @param state A state value to pass to each iteration of the callback.
+     * @param initial An initial value to pass when accumulating results (when "reduce" is true).
+     * @returns If "reduce" is true, the accumulated value. If "reduce" is false, the first truthy
+     *      return value of the callback.
+     */
+    function iterateCommentRanges(reduce, text, pos, trailing, cb, state, initial) {
+        var pendingPos;
+        var pendingEnd;
+        var pendingKind;
+        var pendingHasTrailingNewLine;
+        var hasPendingCommentRange = false;
+        var collecting = trailing || pos === 0;
+        var accumulator = initial;
+        scan: while (pos >= 0 && pos < text.length) {
+            var ch = text.charCodeAt(pos);
+            switch (ch) {
+                case 13 /* carriageReturn */:
+                    if (text.charCodeAt(pos + 1) === 10 /* lineFeed */) {
+                        pos++;
+                    }
+                // falls through
+                case 10 /* lineFeed */:
+                    pos++;
+                    if (trailing) {
+                        break scan;
+                    }
+                    collecting = true;
+                    if (hasPendingCommentRange) {
+                        pendingHasTrailingNewLine = true;
+                    }
+                    continue;
+                case 9 /* tab */:
+                case 11 /* verticalTab */:
+                case 12 /* formFeed */:
+                case 32 /* space */:
+                    pos++;
+                    continue;
+                case 47 /* slash */:
+                    var nextChar = text.charCodeAt(pos + 1);
+                    var hasTrailingNewLine = false;
+                    if (nextChar === 47 /* slash */ || nextChar === 42 /* asterisk */) {
+                        var kind = nextChar === 47 /* slash */ ? 2 /* SingleLineCommentTrivia */ : 3 /* MultiLineCommentTrivia */;
+                        var startPos = pos;
+                        pos += 2;
+                        if (nextChar === 47 /* slash */) {
+                            while (pos < text.length) {
+                                if (isLineBreak(text.charCodeAt(pos))) {
+                                    hasTrailingNewLine = true;
+                                    break;
+                                }
+                                pos++;
+                            }
+                        }
+                        else {
+                            while (pos < text.length) {
+                                if (text.charCodeAt(pos) === 42 /* asterisk */ && text.charCodeAt(pos + 1) === 47 /* slash */) {
+                                    pos += 2;
+                                    break;
+                                }
+                                pos++;
+                            }
+                        }
+                        if (collecting) {
+                            if (hasPendingCommentRange) {
+                                accumulator = cb(pendingPos, pendingEnd, pendingKind, pendingHasTrailingNewLine, state, accumulator);
+                                if (!reduce && accumulator) {
+                                    // If we are not reducing and we have a truthy result, return it.
+                                    return accumulator;
+                                }
+                                hasPendingCommentRange = false;
+                            }
+                            pendingPos = startPos;
+                            pendingEnd = pos;
+                            pendingKind = kind;
+                            pendingHasTrailingNewLine = hasTrailingNewLine;
+                            hasPendingCommentRange = true;
+                        }
+                        continue;
+                    }
+                    break scan;
+                default:
+                    if (ch > 127 /* maxAsciiCharacter */ && (isWhiteSpaceLike(ch))) {
+                        if (hasPendingCommentRange && isLineBreak(ch)) {
+                            pendingHasTrailingNewLine = true;
+                        }
+                        pos++;
+                        continue;
+                    }
+                    break scan;
+            }
+        }
+        if (hasPendingCommentRange) {
+            accumulator = cb(pendingPos, pendingEnd, pendingKind, pendingHasTrailingNewLine, state, accumulator);
+        }
+        return accumulator;
+    }
+    function forEachLeadingCommentRange(text, pos, cb, state) {
+        return iterateCommentRanges(/*reduce*/ false, text, pos, /*trailing*/ false, cb, state);
+    }
+    ts.forEachLeadingCommentRange = forEachLeadingCommentRange;
+    function forEachTrailingCommentRange(text, pos, cb, state) {
+        return iterateCommentRanges(/*reduce*/ false, text, pos, /*trailing*/ true, cb, state);
+    }
+    ts.forEachTrailingCommentRange = forEachTrailingCommentRange;
+    function reduceEachLeadingCommentRange(text, pos, cb, state, initial) {
+        return iterateCommentRanges(/*reduce*/ true, text, pos, /*trailing*/ false, cb, state, initial);
+    }
+    ts.reduceEachLeadingCommentRange = reduceEachLeadingCommentRange;
+    function reduceEachTrailingCommentRange(text, pos, cb, state, initial) {
+        return iterateCommentRanges(/*reduce*/ true, text, pos, /*trailing*/ true, cb, state, initial);
+    }
+    ts.reduceEachTrailingCommentRange = reduceEachTrailingCommentRange;
+    function appendCommentRange(pos, end, kind, hasTrailingNewLine, _state, comments) {
+        if (!comments) {
+            comments = [];
+        }
+        comments.push({ kind: kind, pos: pos, end: end, hasTrailingNewLine: hasTrailingNewLine });
+        return comments;
+    }
+    function getLeadingCommentRanges(text, pos) {
+        return reduceEachLeadingCommentRange(text, pos, appendCommentRange, /*state*/ undefined, /*initial*/ undefined);
+    }
+    ts.getLeadingCommentRanges = getLeadingCommentRanges;
+    function getTrailingCommentRanges(text, pos) {
+        return reduceEachTrailingCommentRange(text, pos, appendCommentRange, /*state*/ undefined, /*initial*/ undefined);
+    }
+    ts.getTrailingCommentRanges = getTrailingCommentRanges;
+    /** Optionally, get the shebang */
+    function getShebang(text) {
+        var match = shebangTriviaRegex.exec(text);
+        if (match) {
+            return match[0];
+        }
+    }
+    ts.getShebang = getShebang;
+    function isIdentifierStart(ch, languageVersion) {
+        return ch >= 65 /* A */ && ch <= 90 /* Z */ || ch >= 97 /* a */ && ch <= 122 /* z */ ||
+            ch === 36 /* $ */ || ch === 95 /* _ */ ||
+            ch > 127 /* maxAsciiCharacter */ && isUnicodeIdentifierStart(ch, languageVersion);
+    }
+    ts.isIdentifierStart = isIdentifierStart;
+    function isIdentifierPart(ch, languageVersion) {
+        return ch >= 65 /* A */ && ch <= 90 /* Z */ || ch >= 97 /* a */ && ch <= 122 /* z */ ||
+            ch >= 48 /* _0 */ && ch <= 57 /* _9 */ || ch === 36 /* $ */ || ch === 95 /* _ */ ||
+            ch > 127 /* maxAsciiCharacter */ && isUnicodeIdentifierPart(ch, languageVersion);
+    }
+    ts.isIdentifierPart = isIdentifierPart;
+    /* @internal */
+    function isIdentifierText(name, languageVersion) {
+        if (!isIdentifierStart(name.charCodeAt(0), languageVersion)) {
+            return false;
+        }
+        for (var i = 1; i < name.length; i++) {
+            if (!isIdentifierPart(name.charCodeAt(i), languageVersion)) {
+                return false;
+            }
+        }
+        return true;
+    }
+    ts.isIdentifierText = isIdentifierText;
+    // Creates a scanner over a (possibly unspecified) range of a piece of text.
+    function createScanner(languageVersion, skipTrivia, languageVariant, text, onError, start, length) {
+        if (languageVariant === void 0) { languageVariant = 0 /* Standard */; }
+        // Current position (end position of text of current token)
+        var pos;
+        // end of text
+        var end;
+        // Start position of whitespace before current token
+        var startPos;
+        // Start position of text of current token
+        var tokenPos;
+        var token;
+        var tokenValue;
+        var precedingLineBreak;
+        var hasExtendedUnicodeEscape;
+        var tokenIsUnterminated;
+        var numericLiteralFlags;
+        setText(text, start, length);
+        return {
+            getStartPos: function () { return startPos; },
+            getTextPos: function () { return pos; },
+            getToken: function () { return token; },
+            getTokenPos: function () { return tokenPos; },
+            getTokenText: function () { return text.substring(tokenPos, pos); },
+            getTokenValue: function () { return tokenValue; },
+            hasExtendedUnicodeEscape: function () { return hasExtendedUnicodeEscape; },
+            hasPrecedingLineBreak: function () { return precedingLineBreak; },
+            isIdentifier: function () { return token === 71 /* Identifier */ || token > 107 /* LastReservedWord */; },
+            isReservedWord: function () { return token >= 72 /* FirstReservedWord */ && token <= 107 /* LastReservedWord */; },
+            isUnterminated: function () { return tokenIsUnterminated; },
+            getNumericLiteralFlags: function () { return numericLiteralFlags; },
+            reScanGreaterToken: reScanGreaterToken,
+            reScanSlashToken: reScanSlashToken,
+            reScanTemplateToken: reScanTemplateToken,
+            scanJsxIdentifier: scanJsxIdentifier,
+            scanJsxAttributeValue: scanJsxAttributeValue,
+            reScanJsxToken: reScanJsxToken,
+            scanJsxToken: scanJsxToken,
+            scanJSDocToken: scanJSDocToken,
+            scan: scan,
+            getText: getText,
+            setText: setText,
+            setScriptTarget: setScriptTarget,
+            setLanguageVariant: setLanguageVariant,
+            setOnError: setOnError,
+            setTextPos: setTextPos,
+            tryScan: tryScan,
+            lookAhead: lookAhead,
+            scanRange: scanRange,
+        };
+        function error(message, length) {
+            if (onError) {
+                onError(message, length || 0);
+            }
+        }
+        function scanNumber() {
+            var start = pos;
+            while (isDigit(text.charCodeAt(pos)))
+                pos++;
+            if (text.charCodeAt(pos) === 46 /* dot */) {
+                pos++;
+                while (isDigit(text.charCodeAt(pos)))
+                    pos++;
+            }
+            var end = pos;
+            if (text.charCodeAt(pos) === 69 /* E */ || text.charCodeAt(pos) === 101 /* e */) {
+                pos++;
+                numericLiteralFlags = 2 /* Scientific */;
+                if (text.charCodeAt(pos) === 43 /* plus */ || text.charCodeAt(pos) === 45 /* minus */)
+                    pos++;
+                if (isDigit(text.charCodeAt(pos))) {
+                    pos++;
+                    while (isDigit(text.charCodeAt(pos)))
+                        pos++;
+                    end = pos;
+                }
+                else {
+                    error(ts.Diagnostics.Digit_expected);
+                }
+            }
+            return "" + +(text.substring(start, end));
+        }
+        function scanOctalDigits() {
+            var start = pos;
+            while (isOctalDigit(text.charCodeAt(pos))) {
+                pos++;
+            }
+            return +(text.substring(start, pos));
+        }
+        /**
+         * Scans the given number of hexadecimal digits in the text,
+         * returning -1 if the given number is unavailable.
+         */
+        function scanExactNumberOfHexDigits(count) {
+            return scanHexDigits(/*minCount*/ count, /*scanAsManyAsPossible*/ false);
+        }
+        /**
+         * Scans as many hexadecimal digits as are available in the text,
+         * returning -1 if the given number of digits was unavailable.
+         */
+        function scanMinimumNumberOfHexDigits(count) {
+            return scanHexDigits(/*minCount*/ count, /*scanAsManyAsPossible*/ true);
+        }
+        function scanHexDigits(minCount, scanAsManyAsPossible) {
+            var digits = 0;
+            var value = 0;
+            while (digits < minCount || scanAsManyAsPossible) {
+                var ch = text.charCodeAt(pos);
+                if (ch >= 48 /* _0 */ && ch <= 57 /* _9 */) {
+                    value = value * 16 + ch - 48 /* _0 */;
+                }
+                else if (ch >= 65 /* A */ && ch <= 70 /* F */) {
+                    value = value * 16 + ch - 65 /* A */ + 10;
+                }
+                else if (ch >= 97 /* a */ && ch <= 102 /* f */) {
+                    value = value * 16 + ch - 97 /* a */ + 10;
+                }
+                else {
+                    break;
+                }
+                pos++;
+                digits++;
+            }
+            if (digits < minCount) {
+                value = -1;
+            }
+            return value;
+        }
+        function scanString(allowEscapes) {
+            if (allowEscapes === void 0) { allowEscapes = true; }
+            var quote = text.charCodeAt(pos);
+            pos++;
+            var result = "";
+            var start = pos;
+            while (true) {
+                if (pos >= end) {
+                    result += text.substring(start, pos);
+                    tokenIsUnterminated = true;
+                    error(ts.Diagnostics.Unterminated_string_literal);
+                    break;
+                }
+                var ch = text.charCodeAt(pos);
+                if (ch === quote) {
+                    result += text.substring(start, pos);
+                    pos++;
+                    break;
+                }
+                if (ch === 92 /* backslash */ && allowEscapes) {
+                    result += text.substring(start, pos);
+                    result += scanEscapeSequence();
+                    start = pos;
+                    continue;
+                }
+                if (isLineBreak(ch)) {
+                    result += text.substring(start, pos);
+                    tokenIsUnterminated = true;
+                    error(ts.Diagnostics.Unterminated_string_literal);
+                    break;
+                }
+                pos++;
+            }
+            return result;
+        }
+        /**
+         * Sets the current 'tokenValue' and returns a NoSubstitutionTemplateLiteral or
+         * a literal component of a TemplateExpression.
+         */
+        function scanTemplateAndSetTokenValue() {
+            var startedWithBacktick = text.charCodeAt(pos) === 96 /* backtick */;
+            pos++;
+            var start = pos;
+            var contents = "";
+            var resultingToken;
+            while (true) {
+                if (pos >= end) {
+                    contents += text.substring(start, pos);
+                    tokenIsUnterminated = true;
+                    error(ts.Diagnostics.Unterminated_template_literal);
+                    resultingToken = startedWithBacktick ? 13 /* NoSubstitutionTemplateLiteral */ : 16 /* TemplateTail */;
+                    break;
+                }
+                var currChar = text.charCodeAt(pos);
+                // '`'
+                if (currChar === 96 /* backtick */) {
+                    contents += text.substring(start, pos);
+                    pos++;
+                    resultingToken = startedWithBacktick ? 13 /* NoSubstitutionTemplateLiteral */ : 16 /* TemplateTail */;
+                    break;
+                }
+                // '${'
+                if (currChar === 36 /* $ */ && pos + 1 < end && text.charCodeAt(pos + 1) === 123 /* openBrace */) {
+                    contents += text.substring(start, pos);
+                    pos += 2;
+                    resultingToken = startedWithBacktick ? 14 /* TemplateHead */ : 15 /* TemplateMiddle */;
+                    break;
+                }
+                // Escape character
+                if (currChar === 92 /* backslash */) {
+                    contents += text.substring(start, pos);
+                    contents += scanEscapeSequence();
+                    start = pos;
+                    continue;
+                }
+                // Speculated ECMAScript 6 Spec 11.8.6.1:
+                // <CR><LF> and <CR> LineTerminatorSequences are normalized to <LF> for Template Values
+                if (currChar === 13 /* carriageReturn */) {
+                    contents += text.substring(start, pos);
+                    pos++;
+                    if (pos < end && text.charCodeAt(pos) === 10 /* lineFeed */) {
+                        pos++;
+                    }
+                    contents += "\n";
+                    start = pos;
+                    continue;
+                }
+                pos++;
+            }
+            ts.Debug.assert(resultingToken !== undefined);
+            tokenValue = contents;
+            return resultingToken;
+        }
+        function scanEscapeSequence() {
+            pos++;
+            if (pos >= end) {
+                error(ts.Diagnostics.Unexpected_end_of_text);
+                return "";
+            }
+            var ch = text.charCodeAt(pos);
+            pos++;
+            switch (ch) {
+                case 48 /* _0 */:
+                    return "\0";
+                case 98 /* b */:
+                    return "\b";
+                case 116 /* t */:
+                    return "\t";
+                case 110 /* n */:
+                    return "\n";
+                case 118 /* v */:
+                    return "\v";
+                case 102 /* f */:
+                    return "\f";
+                case 114 /* r */:
+                    return "\r";
+                case 39 /* singleQuote */:
+                    return "\'";
+                case 34 /* doubleQuote */:
+                    return "\"";
+                case 117 /* u */:
+                    // '\u{DDDDDDDD}'
+                    if (pos < end && text.charCodeAt(pos) === 123 /* openBrace */) {
+                        hasExtendedUnicodeEscape = true;
+                        pos++;
+                        return scanExtendedUnicodeEscape();
+                    }
+                    // '\uDDDD'
+                    return scanHexadecimalEscape(/*numDigits*/ 4);
+                case 120 /* x */:
+                    // '\xDD'
+                    return scanHexadecimalEscape(/*numDigits*/ 2);
+                // when encountering a LineContinuation (i.e. a backslash and a line terminator sequence),
+                // the line terminator is interpreted to be "the empty code unit sequence".
+                case 13 /* carriageReturn */:
+                    if (pos < end && text.charCodeAt(pos) === 10 /* lineFeed */) {
+                        pos++;
+                    }
+                // falls through
+                case 10 /* lineFeed */:
+                case 8232 /* lineSeparator */:
+                case 8233 /* paragraphSeparator */:
+                    return "";
+                default:
+                    return String.fromCharCode(ch);
+            }
+        }
+        function scanHexadecimalEscape(numDigits) {
+            var escapedValue = scanExactNumberOfHexDigits(numDigits);
+            if (escapedValue >= 0) {
+                return String.fromCharCode(escapedValue);
+            }
+            else {
+                error(ts.Diagnostics.Hexadecimal_digit_expected);
+                return "";
+            }
+        }
+        function scanExtendedUnicodeEscape() {
+            var escapedValue = scanMinimumNumberOfHexDigits(1);
+            var isInvalidExtendedEscape = false;
+            // Validate the value of the digit
+            if (escapedValue < 0) {
+                error(ts.Diagnostics.Hexadecimal_digit_expected);
+                isInvalidExtendedEscape = true;
+            }
+            else if (escapedValue > 0x10FFFF) {
+                error(ts.Diagnostics.An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive);
+                isInvalidExtendedEscape = true;
+            }
+            if (pos >= end) {
+                error(ts.Diagnostics.Unexpected_end_of_text);
+                isInvalidExtendedEscape = true;
+            }
+            else if (text.charCodeAt(pos) === 125 /* closeBrace */) {
+                // Only swallow the following character up if it's a '}'.
+                pos++;
+            }
+            else {
+                error(ts.Diagnostics.Unterminated_Unicode_escape_sequence);
+                isInvalidExtendedEscape = true;
+            }
+            if (isInvalidExtendedEscape) {
+                return "";
+            }
+            return utf16EncodeAsString(escapedValue);
+        }
+        // Derived from the 10.1.1 UTF16Encoding of the ES6 Spec.
+        function utf16EncodeAsString(codePoint) {
+            ts.Debug.assert(0x0 <= codePoint && codePoint <= 0x10FFFF);
+            if (codePoint <= 65535) {
+                return String.fromCharCode(codePoint);
+            }
+            var codeUnit1 = Math.floor((codePoint - 65536) / 1024) + 0xD800;
+            var codeUnit2 = ((codePoint - 65536) % 1024) + 0xDC00;
+            return String.fromCharCode(codeUnit1, codeUnit2);
+        }
+        // Current character is known to be a backslash. Check for Unicode escape of the form '\uXXXX'
+        // and return code point value if valid Unicode escape is found. Otherwise return -1.
+        function peekUnicodeEscape() {
+            if (pos + 5 < end && text.charCodeAt(pos + 1) === 117 /* u */) {
+                var start_1 = pos;
+                pos += 2;
+                var value = scanExactNumberOfHexDigits(4);
+                pos = start_1;
+                return value;
+            }
+            return -1;
+        }
+        function scanIdentifierParts() {
+            var result = "";
+            var start = pos;
+            while (pos < end) {
+                var ch = text.charCodeAt(pos);
+                if (isIdentifierPart(ch, languageVersion)) {
+                    pos++;
+                }
+                else if (ch === 92 /* backslash */) {
+                    ch = peekUnicodeEscape();
+                    if (!(ch >= 0 && isIdentifierPart(ch, languageVersion))) {
+                        break;
+                    }
+                    result += text.substring(start, pos);
+                    result += String.fromCharCode(ch);
+                    // Valid Unicode escape is always six characters
+                    pos += 6;
+                    start = pos;
+                }
+                else {
+                    break;
+                }
+            }
+            result += text.substring(start, pos);
+            return result;
+        }
+        function getIdentifierToken() {
+            // Reserved words are between 2 and 11 characters long and start with a lowercase letter
+            var len = tokenValue.length;
+            if (len >= 2 && len <= 11) {
+                var ch = tokenValue.charCodeAt(0);
+                if (ch >= 97 /* a */ && ch <= 122 /* z */) {
+                    token = textToToken.get(tokenValue);
+                    if (token !== undefined) {
+                        return token;
+                    }
+                }
+            }
+            return token = 71 /* Identifier */;
+        }
+        function scanBinaryOrOctalDigits(base) {
+            ts.Debug.assert(base === 2 || base === 8, "Expected either base 2 or base 8");
+            var value = 0;
+            // For counting number of digits; Valid binaryIntegerLiteral must have at least one binary digit following B or b.
+            // Similarly valid octalIntegerLiteral must have at least one octal digit following o or O.
+            var numberOfDigits = 0;
+            while (true) {
+                var ch = text.charCodeAt(pos);
+                var valueOfCh = ch - 48 /* _0 */;
+                if (!isDigit(ch) || valueOfCh >= base) {
+                    break;
+                }
+                value = value * base + valueOfCh;
+                pos++;
+                numberOfDigits++;
+            }
+            // Invalid binaryIntegerLiteral or octalIntegerLiteral
+            if (numberOfDigits === 0) {
+                return -1;
+            }
+            return value;
+        }
+        function scan() {
+            startPos = pos;
+            hasExtendedUnicodeEscape = false;
+            precedingLineBreak = false;
+            tokenIsUnterminated = false;
+            numericLiteralFlags = 0;
+            while (true) {
+                tokenPos = pos;
+                if (pos >= end) {
+                    return token = 1 /* EndOfFileToken */;
+                }
+                var ch = text.charCodeAt(pos);
+                // Special handling for shebang
+                if (ch === 35 /* hash */ && pos === 0 && isShebangTrivia(text, pos)) {
+                    pos = scanShebangTrivia(text, pos);
+                    if (skipTrivia) {
+                        continue;
+                    }
+                    else {
+                        return token = 6 /* ShebangTrivia */;
+                    }
+                }
+                switch (ch) {
+                    case 10 /* lineFeed */:
+                    case 13 /* carriageReturn */:
+                        precedingLineBreak = true;
+                        if (skipTrivia) {
+                            pos++;
+                            continue;
+                        }
+                        else {
+                            if (ch === 13 /* carriageReturn */ && pos + 1 < end && text.charCodeAt(pos + 1) === 10 /* lineFeed */) {
+                                // consume both CR and LF
+                                pos += 2;
+                            }
+                            else {
+                                pos++;
+                            }
+                            return token = 4 /* NewLineTrivia */;
+                        }
+                    case 9 /* tab */:
+                    case 11 /* verticalTab */:
+                    case 12 /* formFeed */:
+                    case 32 /* space */:
+                        if (skipTrivia) {
+                            pos++;
+                            continue;
+                        }
+                        else {
+                            while (pos < end && isWhiteSpaceSingleLine(text.charCodeAt(pos))) {
+                                pos++;
+                            }
+                            return token = 5 /* WhitespaceTrivia */;
+                        }
+                    case 33 /* exclamation */:
+                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
+                            if (text.charCodeAt(pos + 2) === 61 /* equals */) {
+                                return pos += 3, token = 35 /* ExclamationEqualsEqualsToken */;
+                            }
+                            return pos += 2, token = 33 /* ExclamationEqualsToken */;
+                        }
+                        pos++;
+                        return token = 51 /* ExclamationToken */;
+                    case 34 /* doubleQuote */:
+                    case 39 /* singleQuote */:
+                        tokenValue = scanString();
+                        return token = 9 /* StringLiteral */;
+                    case 96 /* backtick */:
+                        return token = scanTemplateAndSetTokenValue();
+                    case 37 /* percent */:
+                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
+                            return pos += 2, token = 64 /* PercentEqualsToken */;
+                        }
+                        pos++;
+                        return token = 42 /* PercentToken */;
+                    case 38 /* ampersand */:
+                        if (text.charCodeAt(pos + 1) === 38 /* ampersand */) {
+                            return pos += 2, token = 53 /* AmpersandAmpersandToken */;
+                        }
+                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
+                            return pos += 2, token = 68 /* AmpersandEqualsToken */;
+                        }
+                        pos++;
+                        return token = 48 /* AmpersandToken */;
+                    case 40 /* openParen */:
+                        pos++;
+                        return token = 19 /* OpenParenToken */;
+                    case 41 /* closeParen */:
+                        pos++;
+                        return token = 20 /* CloseParenToken */;
+                    case 42 /* asterisk */:
+                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
+                            return pos += 2, token = 61 /* AsteriskEqualsToken */;
+                        }
+                        if (text.charCodeAt(pos + 1) === 42 /* asterisk */) {
+                            if (text.charCodeAt(pos + 2) === 61 /* equals */) {
+                                return pos += 3, token = 62 /* AsteriskAsteriskEqualsToken */;
+                            }
+                            return pos += 2, token = 40 /* AsteriskAsteriskToken */;
+                        }
+                        pos++;
+                        return token = 39 /* AsteriskToken */;
+                    case 43 /* plus */:
+                        if (text.charCodeAt(pos + 1) === 43 /* plus */) {
+                            return pos += 2, token = 43 /* PlusPlusToken */;
+                        }
+                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
+                            return pos += 2, token = 59 /* PlusEqualsToken */;
+                        }
+                        pos++;
+                        return token = 37 /* PlusToken */;
+                    case 44 /* comma */:
+                        pos++;
+                        return token = 26 /* CommaToken */;
+                    case 45 /* minus */:
+                        if (text.charCodeAt(pos + 1) === 45 /* minus */) {
+                            return pos += 2, token = 44 /* MinusMinusToken */;
+                        }
+                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
+                            return pos += 2, token = 60 /* MinusEqualsToken */;
+                        }
+                        pos++;
+                        return token = 38 /* MinusToken */;
+                    case 46 /* dot */:
+                        if (isDigit(text.charCodeAt(pos + 1))) {
+                            tokenValue = scanNumber();
+                            return token = 8 /* NumericLiteral */;
+                        }
+                        if (text.charCodeAt(pos + 1) === 46 /* dot */ && text.charCodeAt(pos + 2) === 46 /* dot */) {
+                            return pos += 3, token = 24 /* DotDotDotToken */;
+                        }
+                        pos++;
+                        return token = 23 /* DotToken */;
+                    case 47 /* slash */:
+                        // Single-line comment
+                        if (text.charCodeAt(pos + 1) === 47 /* slash */) {
+                            pos += 2;
+                            while (pos < end) {
+                                if (isLineBreak(text.charCodeAt(pos))) {
+                                    break;
+                                }
+                                pos++;
+                            }
+                            if (skipTrivia) {
+                                continue;
+                            }
+                            else {
+                                return token = 2 /* SingleLineCommentTrivia */;
+                            }
+                        }
+                        // Multi-line comment
+                        if (text.charCodeAt(pos + 1) === 42 /* asterisk */) {
+                            pos += 2;
+                            var commentClosed = false;
+                            while (pos < end) {
+                                var ch_1 = text.charCodeAt(pos);
+                                if (ch_1 === 42 /* asterisk */ && text.charCodeAt(pos + 1) === 47 /* slash */) {
+                                    pos += 2;
+                                    commentClosed = true;
+                                    break;
+                                }
+                                if (isLineBreak(ch_1)) {
+                                    precedingLineBreak = true;
+                                }
+                                pos++;
+                            }
+                            if (!commentClosed) {
+                                error(ts.Diagnostics.Asterisk_Slash_expected);
+                            }
+                            if (skipTrivia) {
+                                continue;
+                            }
+                            else {
+                                tokenIsUnterminated = !commentClosed;
+                                return token = 3 /* MultiLineCommentTrivia */;
+                            }
+                        }
+                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
+                            return pos += 2, token = 63 /* SlashEqualsToken */;
+                        }
+                        pos++;
+                        return token = 41 /* SlashToken */;
+                    case 48 /* _0 */:
+                        if (pos + 2 < end && (text.charCodeAt(pos + 1) === 88 /* X */ || text.charCodeAt(pos + 1) === 120 /* x */)) {
+                            pos += 2;
+                            var value = scanMinimumNumberOfHexDigits(1);
+                            if (value < 0) {
+                                error(ts.Diagnostics.Hexadecimal_digit_expected);
+                                value = 0;
+                            }
+                            tokenValue = "" + value;
+                            numericLiteralFlags = 8 /* HexSpecifier */;
+                            return token = 8 /* NumericLiteral */;
+                        }
+                        else if (pos + 2 < end && (text.charCodeAt(pos + 1) === 66 /* B */ || text.charCodeAt(pos + 1) === 98 /* b */)) {
+                            pos += 2;
+                            var value = scanBinaryOrOctalDigits(/* base */ 2);
+                            if (value < 0) {
+                                error(ts.Diagnostics.Binary_digit_expected);
+                                value = 0;
+                            }
+                            tokenValue = "" + value;
+                            numericLiteralFlags = 16 /* BinarySpecifier */;
+                            return token = 8 /* NumericLiteral */;
+                        }
+                        else if (pos + 2 < end && (text.charCodeAt(pos + 1) === 79 /* O */ || text.charCodeAt(pos + 1) === 111 /* o */)) {
+                            pos += 2;
+                            var value = scanBinaryOrOctalDigits(/* base */ 8);
+                            if (value < 0) {
+                                error(ts.Diagnostics.Octal_digit_expected);
+                                value = 0;
+                            }
+                            tokenValue = "" + value;
+                            numericLiteralFlags = 32 /* OctalSpecifier */;
+                            return token = 8 /* NumericLiteral */;
+                        }
+                        // Try to parse as an octal
+                        if (pos + 1 < end && isOctalDigit(text.charCodeAt(pos + 1))) {
+                            tokenValue = "" + scanOctalDigits();
+                            numericLiteralFlags = 4 /* Octal */;
+                            return token = 8 /* NumericLiteral */;
+                        }
+                    // This fall-through is a deviation from the EcmaScript grammar. The grammar says that a leading zero
+                    // can only be followed by an octal digit, a dot, or the end of the number literal. However, we are being
+                    // permissive and allowing decimal digits of the form 08* and 09* (which many browsers also do).
+                    // falls through
+                    case 49 /* _1 */:
+                    case 50 /* _2 */:
+                    case 51 /* _3 */:
+                    case 52 /* _4 */:
+                    case 53 /* _5 */:
+                    case 54 /* _6 */:
+                    case 55 /* _7 */:
+                    case 56 /* _8 */:
+                    case 57 /* _9 */:
+                        tokenValue = scanNumber();
+                        return token = 8 /* NumericLiteral */;
+                    case 58 /* colon */:
+                        pos++;
+                        return token = 56 /* ColonToken */;
+                    case 59 /* semicolon */:
+                        pos++;
+                        return token = 25 /* SemicolonToken */;
+                    case 60 /* lessThan */:
+                        if (isConflictMarkerTrivia(text, pos)) {
+                            pos = scanConflictMarkerTrivia(text, pos, error);
+                            if (skipTrivia) {
+                                continue;
+                            }
+                            else {
+                                return token = 7 /* ConflictMarkerTrivia */;
+                            }
+                        }
+                        if (text.charCodeAt(pos + 1) === 60 /* lessThan */) {
+                            if (text.charCodeAt(pos + 2) === 61 /* equals */) {
+                                return pos += 3, token = 65 /* LessThanLessThanEqualsToken */;
+                            }
+                            return pos += 2, token = 45 /* LessThanLessThanToken */;
+                        }
+                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
+                            return pos += 2, token = 30 /* LessThanEqualsToken */;
+                        }
+                        if (languageVariant === 1 /* JSX */ &&
+                            text.charCodeAt(pos + 1) === 47 /* slash */ &&
+                            text.charCodeAt(pos + 2) !== 42 /* asterisk */) {
+                            return pos += 2, token = 28 /* LessThanSlashToken */;
+                        }
+                        pos++;
+                        return token = 27 /* LessThanToken */;
+                    case 61 /* equals */:
+                        if (isConflictMarkerTrivia(text, pos)) {
+                            pos = scanConflictMarkerTrivia(text, pos, error);
+                            if (skipTrivia) {
+                                continue;
+                            }
+                            else {
+                                return token = 7 /* ConflictMarkerTrivia */;
+                            }
+                        }
+                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
+                            if (text.charCodeAt(pos + 2) === 61 /* equals */) {
+                                return pos += 3, token = 34 /* EqualsEqualsEqualsToken */;
+                            }
+                            return pos += 2, token = 32 /* EqualsEqualsToken */;
+                        }
+                        if (text.charCodeAt(pos + 1) === 62 /* greaterThan */) {
+                            return pos += 2, token = 36 /* EqualsGreaterThanToken */;
+                        }
+                        pos++;
+                        return token = 58 /* EqualsToken */;
+                    case 62 /* greaterThan */:
+                        if (isConflictMarkerTrivia(text, pos)) {
+                            pos = scanConflictMarkerTrivia(text, pos, error);
+                            if (skipTrivia) {
+                                continue;
+                            }
+                            else {
+                                return token = 7 /* ConflictMarkerTrivia */;
+                            }
+                        }
+                        pos++;
+                        return token = 29 /* GreaterThanToken */;
+                    case 63 /* question */:
+                        pos++;
+                        return token = 55 /* QuestionToken */;
+                    case 91 /* openBracket */:
+                        pos++;
+                        return token = 21 /* OpenBracketToken */;
+                    case 93 /* closeBracket */:
+                        pos++;
+                        return token = 22 /* CloseBracketToken */;
+                    case 94 /* caret */:
+                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
+                            return pos += 2, token = 70 /* CaretEqualsToken */;
+                        }
+                        pos++;
+                        return token = 50 /* CaretToken */;
+                    case 123 /* openBrace */:
+                        pos++;
+                        return token = 17 /* OpenBraceToken */;
+                    case 124 /* bar */:
+                        if (isConflictMarkerTrivia(text, pos)) {
+                            pos = scanConflictMarkerTrivia(text, pos, error);
+                            if (skipTrivia) {
+                                continue;
+                            }
+                            else {
+                                return token = 7 /* ConflictMarkerTrivia */;
+                            }
+                        }
+                        if (text.charCodeAt(pos + 1) === 124 /* bar */) {
+                            return pos += 2, token = 54 /* BarBarToken */;
+                        }
+                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
+                            return pos += 2, token = 69 /* BarEqualsToken */;
+                        }
+                        pos++;
+                        return token = 49 /* BarToken */;
+                    case 125 /* closeBrace */:
+                        pos++;
+                        return token = 18 /* CloseBraceToken */;
+                    case 126 /* tilde */:
+                        pos++;
+                        return token = 52 /* TildeToken */;
+                    case 64 /* at */:
+                        pos++;
+                        return token = 57 /* AtToken */;
+                    case 92 /* backslash */:
+                        var cookedChar = peekUnicodeEscape();
+                        if (cookedChar >= 0 && isIdentifierStart(cookedChar, languageVersion)) {
+                            pos += 6;
+                            tokenValue = String.fromCharCode(cookedChar) + scanIdentifierParts();
+                            return token = getIdentifierToken();
+                        }
+                        error(ts.Diagnostics.Invalid_character);
+                        pos++;
+                        return token = 0 /* Unknown */;
+                    default:
+                        if (isIdentifierStart(ch, languageVersion)) {
+                            pos++;
+                            while (pos < end && isIdentifierPart(ch = text.charCodeAt(pos), languageVersion))
+                                pos++;
+                            tokenValue = text.substring(tokenPos, pos);
+                            if (ch === 92 /* backslash */) {
+                                tokenValue += scanIdentifierParts();
+                            }
+                            return token = getIdentifierToken();
+                        }
+                        else if (isWhiteSpaceSingleLine(ch)) {
+                            pos++;
+                            continue;
+                        }
+                        else if (isLineBreak(ch)) {
+                            precedingLineBreak = true;
+                            pos++;
+                            continue;
+                        }
+                        error(ts.Diagnostics.Invalid_character);
+                        pos++;
+                        return token = 0 /* Unknown */;
+                }
+            }
+        }
+        function reScanGreaterToken() {
+            if (token === 29 /* GreaterThanToken */) {
+                if (text.charCodeAt(pos) === 62 /* greaterThan */) {
+                    if (text.charCodeAt(pos + 1) === 62 /* greaterThan */) {
+                        if (text.charCodeAt(pos + 2) === 61 /* equals */) {
+                            return pos += 3, token = 67 /* GreaterThanGreaterThanGreaterThanEqualsToken */;
+                        }
+                        return pos += 2, token = 47 /* GreaterThanGreaterThanGreaterThanToken */;
+                    }
+                    if (text.charCodeAt(pos + 1) === 61 /* equals */) {
+                        return pos += 2, token = 66 /* GreaterThanGreaterThanEqualsToken */;
+                    }
+                    pos++;
+                    return token = 46 /* GreaterThanGreaterThanToken */;
+                }
+                if (text.charCodeAt(pos) === 61 /* equals */) {
+                    pos++;
+                    return token = 31 /* GreaterThanEqualsToken */;
+                }
+            }
+            return token;
+        }
+        function reScanSlashToken() {
+            if (token === 41 /* SlashToken */ || token === 63 /* SlashEqualsToken */) {
+                var p = tokenPos + 1;
+                var inEscape = false;
+                var inCharacterClass = false;
+                while (true) {
+                    // If we reach the end of a file, or hit a newline, then this is an unterminated
+                    // regex.  Report error and return what we have so far.
+                    if (p >= end) {
+                        tokenIsUnterminated = true;
+                        error(ts.Diagnostics.Unterminated_regular_expression_literal);
+                        break;
+                    }
+                    var ch = text.charCodeAt(p);
+                    if (isLineBreak(ch)) {
+                        tokenIsUnterminated = true;
+                        error(ts.Diagnostics.Unterminated_regular_expression_literal);
+                        break;
+                    }
+                    if (inEscape) {
+                        // Parsing an escape character;
+                        // reset the flag and just advance to the next char.
+                        inEscape = false;
+                    }
+                    else if (ch === 47 /* slash */ && !inCharacterClass) {
+                        // A slash within a character class is permissible,
+                        // but in general it signals the end of the regexp literal.
+                        p++;
+                        break;
+                    }
+                    else if (ch === 91 /* openBracket */) {
+                        inCharacterClass = true;
+                    }
+                    else if (ch === 92 /* backslash */) {
+                        inEscape = true;
+                    }
+                    else if (ch === 93 /* closeBracket */) {
+                        inCharacterClass = false;
+                    }
+                    p++;
+                }
+                while (p < end && isIdentifierPart(text.charCodeAt(p), languageVersion)) {
+                    p++;
+                }
+                pos = p;
+                tokenValue = text.substring(tokenPos, pos);
+                token = 12 /* RegularExpressionLiteral */;
+            }
+            return token;
+        }
+        /**
+         * Unconditionally back up and scan a template expression portion.
+         */
+        function reScanTemplateToken() {
+            ts.Debug.assert(token === 18 /* CloseBraceToken */, "'reScanTemplateToken' should only be called on a '}'");
+            pos = tokenPos;
+            return token = scanTemplateAndSetTokenValue();
+        }
+        function reScanJsxToken() {
+            pos = tokenPos = startPos;
+            return token = scanJsxToken();
+        }
+        function scanJsxToken() {
+            startPos = tokenPos = pos;
+            if (pos >= end) {
+                return token = 1 /* EndOfFileToken */;
+            }
+            var char = text.charCodeAt(pos);
+            if (char === 60 /* lessThan */) {
+                if (text.charCodeAt(pos + 1) === 47 /* slash */) {
+                    pos += 2;
+                    return token = 28 /* LessThanSlashToken */;
+                }
+                pos++;
+                return token = 27 /* LessThanToken */;
+            }
+            if (char === 123 /* openBrace */) {
+                pos++;
+                return token = 17 /* OpenBraceToken */;
+            }
+            // First non-whitespace character on this line.
+            var firstNonWhitespace = 0;
+            // These initial values are special because the first line is:
+            // firstNonWhitespace = 0 to indicate that we want leading whitspace,
+            while (pos < end) {
+                char = text.charCodeAt(pos);
+                if (char === 123 /* openBrace */) {
+                    break;
+                }
+                if (char === 60 /* lessThan */) {
+                    if (isConflictMarkerTrivia(text, pos)) {
+                        pos = scanConflictMarkerTrivia(text, pos, error);
+                        return token = 7 /* ConflictMarkerTrivia */;
+                    }
+                    break;
+                }
+                // FirstNonWhitespace is 0, then we only see whitespaces so far. If we see a linebreak, we want to ignore that whitespaces.
+                // i.e (- : whitespace)
+                //      <div>----
+                //      </div> becomes <div></div>
+                //
+                //      <div>----</div> becomes <div>----</div>
+                if (isLineBreak(char) && firstNonWhitespace === 0) {
+                    firstNonWhitespace = -1;
+                }
+                else if (!isWhiteSpaceLike(char)) {
+                    firstNonWhitespace = pos;
+                }
+                pos++;
+            }
+            return firstNonWhitespace === -1 ? 11 /* JsxTextAllWhiteSpaces */ : 10 /* JsxText */;
+        }
+        // Scans a JSX identifier; these differ from normal identifiers in that
+        // they allow dashes
+        function scanJsxIdentifier() {
+            if (tokenIsIdentifierOrKeyword(token)) {
+                var firstCharPosition = pos;
+                while (pos < end) {
+                    var ch = text.charCodeAt(pos);
+                    if (ch === 45 /* minus */ || ((firstCharPosition === pos) ? isIdentifierStart(ch, languageVersion) : isIdentifierPart(ch, languageVersion))) {
+                        pos++;
+                    }
+                    else {
+                        break;
+                    }
+                }
+                tokenValue += text.substr(firstCharPosition, pos - firstCharPosition);
+            }
+            return token;
+        }
+        function scanJsxAttributeValue() {
+            startPos = pos;
+            switch (text.charCodeAt(pos)) {
+                case 34 /* doubleQuote */:
+                case 39 /* singleQuote */:
+                    tokenValue = scanString(/*allowEscapes*/ false);
+                    return token = 9 /* StringLiteral */;
+                default:
+                    // If this scans anything other than `{`, it's a parse error.
+                    return scan();
+            }
+        }
+        function scanJSDocToken() {
+            if (pos >= end) {
+                return token = 1 /* EndOfFileToken */;
+            }
+            startPos = pos;
+            tokenPos = pos;
+            var ch = text.charCodeAt(pos);
+            switch (ch) {
+                case 9 /* tab */:
+                case 11 /* verticalTab */:
+                case 12 /* formFeed */:
+                case 32 /* space */:
+                    while (pos < end && isWhiteSpaceSingleLine(text.charCodeAt(pos))) {
+                        pos++;
+                    }
+                    return token = 5 /* WhitespaceTrivia */;
+                case 64 /* at */:
+                    pos++;
+                    return token = 57 /* AtToken */;
+                case 10 /* lineFeed */:
+                case 13 /* carriageReturn */:
+                    pos++;
+                    return token = 4 /* NewLineTrivia */;
+                case 42 /* asterisk */:
+                    pos++;
+                    return token = 39 /* AsteriskToken */;
+                case 123 /* openBrace */:
+                    pos++;
+                    return token = 17 /* OpenBraceToken */;
+                case 125 /* closeBrace */:
+                    pos++;
+                    return token = 18 /* CloseBraceToken */;
+                case 91 /* openBracket */:
+                    pos++;
+                    return token = 21 /* OpenBracketToken */;
+                case 93 /* closeBracket */:
+                    pos++;
+                    return token = 22 /* CloseBracketToken */;
+                case 61 /* equals */:
+                    pos++;
+                    return token = 58 /* EqualsToken */;
+                case 44 /* comma */:
+                    pos++;
+                    return token = 26 /* CommaToken */;
+                case 46 /* dot */:
+                    pos++;
+                    return token = 23 /* DotToken */;
+            }
+            if (isIdentifierStart(ch, 5 /* Latest */)) {
+                pos++;
+                while (isIdentifierPart(text.charCodeAt(pos), 5 /* Latest */) && pos < end) {
+                    pos++;
+                }
+                return token = 71 /* Identifier */;
+            }
+            else {
+                return pos += 1, token = 0 /* Unknown */;
+            }
+        }
+        function speculationHelper(callback, isLookahead) {
+            var savePos = pos;
+            var saveStartPos = startPos;
+            var saveTokenPos = tokenPos;
+            var saveToken = token;
+            var saveTokenValue = tokenValue;
+            var savePrecedingLineBreak = precedingLineBreak;
+            var result = callback();
+            // If our callback returned something 'falsy' or we're just looking ahead,
+            // then unconditionally restore us to where we were.
+            if (!result || isLookahead) {
+                pos = savePos;
+                startPos = saveStartPos;
+                tokenPos = saveTokenPos;
+                token = saveToken;
+                tokenValue = saveTokenValue;
+                precedingLineBreak = savePrecedingLineBreak;
+            }
+            return result;
+        }
+        function scanRange(start, length, callback) {
+            var saveEnd = end;
+            var savePos = pos;
+            var saveStartPos = startPos;
+            var saveTokenPos = tokenPos;
+            var saveToken = token;
+            var savePrecedingLineBreak = precedingLineBreak;
+            var saveTokenValue = tokenValue;
+            var saveHasExtendedUnicodeEscape = hasExtendedUnicodeEscape;
+            var saveTokenIsUnterminated = tokenIsUnterminated;
+            setText(text, start, length);
+            var result = callback();
+            end = saveEnd;
+            pos = savePos;
+            startPos = saveStartPos;
+            tokenPos = saveTokenPos;
+            token = saveToken;
+            precedingLineBreak = savePrecedingLineBreak;
+            tokenValue = saveTokenValue;
+            hasExtendedUnicodeEscape = saveHasExtendedUnicodeEscape;
+            tokenIsUnterminated = saveTokenIsUnterminated;
+            return result;
+        }
+        function lookAhead(callback) {
+            return speculationHelper(callback, /*isLookahead*/ true);
+        }
+        function tryScan(callback) {
+            return speculationHelper(callback, /*isLookahead*/ false);
+        }
+        function getText() {
+            return text;
+        }
+        function setText(newText, start, length) {
+            text = newText || "";
+            end = length === undefined ? text.length : start + length;
+            setTextPos(start || 0);
+        }
+        function setOnError(errorCallback) {
+            onError = errorCallback;
+        }
+        function setScriptTarget(scriptTarget) {
+            languageVersion = scriptTarget;
+        }
+        function setLanguageVariant(variant) {
+            languageVariant = variant;
+        }
+        function setTextPos(textPos) {
+            ts.Debug.assert(textPos >= 0);
+            pos = textPos;
+            startPos = textPos;
+            tokenPos = textPos;
+            token = 0 /* Unknown */;
+            precedingLineBreak = false;
+            tokenValue = undefined;
+            hasExtendedUnicodeEscape = false;
+            tokenIsUnterminated = false;
+        }
+    }
+    ts.createScanner = createScanner;
+})(ts || (ts = {}));
+/// <reference path="utilities.ts"/>
+/// <reference path="scanner.ts"/>
 var ts;
 (function (ts) {
-    /* @internal */
-    function tokenIsIdentifierOrKeyword(token) {
-        return token >= 69 /* Identifier */;
+    var NodeConstructor;
+    var TokenConstructor;
+    var IdentifierConstructor;
+    var SourceFileConstructor;
+    function createNode(kind, pos, end) {
+        if (kind === 265 /* SourceFile */) {
+            return new (SourceFileConstructor || (SourceFileConstructor = ts.objectAllocator.getSourceFileConstructor()))(kind, pos, end);
+        }
+        else if (kind === 71 /* Identifier */) {
+            return new (IdentifierConstructor || (IdentifierConstructor = ts.objectAllocator.getIdentifierConstructor()))(kind, pos, end);
+        }
+        else if (!ts.isNodeKind(kind)) {
+            return new (TokenConstructor || (TokenConstructor = ts.objectAllocator.getTokenConstructor()))(kind, pos, end);
+        }
+        else {
+            return new (NodeConstructor || (NodeConstructor = ts.objectAllocator.getNodeConstructor()))(kind, pos, end);
+        }
     }
-    ts.tokenIsIdentifierOrKeyword = tokenIsIdentifierOrKeyword;
-    var textToToken = ts.createMap({
-        "abstract": 115 /* AbstractKeyword */,
-        "any": 117 /* AnyKeyword */,
-        "as": 116 /* AsKeyword */,
-        "boolean": 120 /* BooleanKeyword */,
-        "break": 70 /* BreakKeyword */,
-        "case": 71 /* CaseKeyword */,
-        "catch": 72 /* CatchKeyword */,
-        "class": 73 /* ClassKeyword */,
-        "continue": 75 /* ContinueKeyword */,
-        "const": 74 /* ConstKeyword */,
-        "constructor": 121 /* ConstructorKeyword */,
-        "debugger": 76 /* DebuggerKeyword */,
-        "declare": 122 /* DeclareKeyword */,
-        "default": 77 /* DefaultKeyword */,
-        "delete": 78 /* DeleteKeyword */,
-        "do": 79 /* DoKeyword */,
-        "else": 80 /* ElseKeyword */,
-        "enum": 81 /* EnumKeyword */,
-        "export": 82 /* ExportKeyword */,
-        "extends": 83 /* ExtendsKeyword */,
-        "false": 84 /* FalseKeyword */,
-        "finally": 85 /* FinallyKeyword */,
-        "for": 86 /* ForKeyword */,
-        "from": 136 /* FromKeyword */,
-        "function": 87 /* FunctionKeyword */,
-        "get": 123 /* GetKeyword */,
-        "if": 88 /* IfKeyword */,
-        "implements": 106 /* ImplementsKeyword */,
-        "import": 89 /* ImportKeyword */,
-        "in": 90 /* InKeyword */,
-        "instanceof": 91 /* InstanceOfKeyword */,
-        "interface": 107 /* InterfaceKeyword */,
-        "is": 124 /* IsKeyword */,
-        "let": 108 /* LetKeyword */,
-        "module": 125 /* ModuleKeyword */,
-        "namespace": 126 /* NamespaceKeyword */,
-        "never": 127 /* NeverKeyword */,
-        "new": 92 /* NewKeyword */,
-        "null": 93 /* NullKeyword */,
-        "number": 130 /* NumberKeyword */,
-        "package": 109 /* PackageKeyword */,
-        "private": 110 /* PrivateKeyword */,
-        "protected": 111 /* ProtectedKeyword */,
-        "public": 112 /* PublicKeyword */,
-        "readonly": 128 /* ReadonlyKeyword */,
-        "require": 129 /* RequireKeyword */,
-        "global": 137 /* GlobalKeyword */,
-        "return": 94 /* ReturnKeyword */,
-        "set": 131 /* SetKeyword */,
-        "static": 113 /* StaticKeyword */,
-        "string": 132 /* StringKeyword */,
-        "super": 95 /* SuperKeyword */,
-        "switch": 96 /* SwitchKeyword */,
-        "symbol": 133 /* SymbolKeyword */,
-        "this": 97 /* ThisKeyword */,
-        "throw": 98 /* ThrowKeyword */,
-        "true": 99 /* TrueKeyword */,
-        "try": 100 /* TryKeyword */,
-        "type": 134 /* TypeKeyword */,
-        "typeof": 101 /* TypeOfKeyword */,
-        "undefined": 135 /* UndefinedKeyword */,
-        "var": 102 /* VarKeyword */,
-        "void": 103 /* VoidKeyword */,
-        "while": 104 /* WhileKeyword */,
-        "with": 105 /* WithKeyword */,
-        "yield": 114 /* YieldKeyword */,
-        "async": 118 /* AsyncKeyword */,
-        "await": 119 /* AwaitKeyword */,
-        "of": 138 /* OfKeyword */,
-        "{": 15 /* OpenBraceToken */,
-        "}": 16 /* CloseBraceToken */,
-        "(": 17 /* OpenParenToken */,
-        ")": 18 /* CloseParenToken */,
-        "[": 19 /* OpenBracketToken */,
-        "]": 20 /* CloseBracketToken */,
-        ".": 21 /* DotToken */,
-        "...": 22 /* DotDotDotToken */,
-        ";": 23 /* SemicolonToken */,
-        ",": 24 /* CommaToken */,
-        "<": 25 /* LessThanToken */,
-        ">": 27 /* GreaterThanToken */,
-        "<=": 28 /* LessThanEqualsToken */,
-        ">=": 29 /* GreaterThanEqualsToken */,
-        "==": 30 /* EqualsEqualsToken */,
-        "!=": 31 /* ExclamationEqualsToken */,
-        "===": 32 /* EqualsEqualsEqualsToken */,
-        "!==": 33 /* ExclamationEqualsEqualsToken */,
-        "=>": 34 /* EqualsGreaterThanToken */,
-        "+": 35 /* PlusToken */,
-        "-": 36 /* MinusToken */,
-        "**": 38 /* AsteriskAsteriskToken */,
-        "*": 37 /* AsteriskToken */,
-        "/": 39 /* SlashToken */,
-        "%": 40 /* PercentToken */,
-        "++": 41 /* PlusPlusToken */,
-        "--": 42 /* MinusMinusToken */,
-        "<<": 43 /* LessThanLessThanToken */,
-        "</": 26 /* LessThanSlashToken */,
-        ">>": 44 /* GreaterThanGreaterThanToken */,
-        ">>>": 45 /* GreaterThanGreaterThanGreaterThanToken */,
-        "&": 46 /* AmpersandToken */,
-        "|": 47 /* BarToken */,
-        "^": 48 /* CaretToken */,
-        "!": 49 /* ExclamationToken */,
-        "~": 50 /* TildeToken */,
-        "&&": 51 /* AmpersandAmpersandToken */,
-        "||": 52 /* BarBarToken */,
-        "?": 53 /* QuestionToken */,
-        ":": 54 /* ColonToken */,
-        "=": 56 /* EqualsToken */,
-        "+=": 57 /* PlusEqualsToken */,
-        "-=": 58 /* MinusEqualsToken */,
-        "*=": 59 /* AsteriskEqualsToken */,
-        "**=": 60 /* AsteriskAsteriskEqualsToken */,
-        "/=": 61 /* SlashEqualsToken */,
-        "%=": 62 /* PercentEqualsToken */,
-        "<<=": 63 /* LessThanLessThanEqualsToken */,
-        ">>=": 64 /* GreaterThanGreaterThanEqualsToken */,
-        ">>>=": 65 /* GreaterThanGreaterThanGreaterThanEqualsToken */,
-        "&=": 66 /* AmpersandEqualsToken */,
-        "|=": 67 /* BarEqualsToken */,
-        "^=": 68 /* CaretEqualsToken */,
-        "@": 55 /* AtToken */,
-    });
-    /*
-        As per ECMAScript Language Specification 3th Edition, Section 7.6: Identifiers
-        IdentifierStart ::
-            Can contain Unicode 3.0.0  categories:
-            Uppercase letter (Lu),
-            Lowercase letter (Ll),
-            Titlecase letter (Lt),
-            Modifier letter (Lm),
-            Other letter (Lo), or
-            Letter number (Nl).
-        IdentifierPart :: =
-            Can contain IdentifierStart + Unicode 3.0.0  categories:
-            Non-spacing mark (Mn),
-            Combining spacing mark (Mc),
-            Decimal number (Nd), or
-            Connector punctuation (Pc).
-
-        Codepoint ranges for ES3 Identifiers are extracted from the Unicode 3.0.0 specification at:
-        http://www.unicode.org/Public/3.0-Update/UnicodeData-3.0.0.txt
-    */
-    var unicodeES3IdentifierStart = [170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 543, 546, 563, 592, 685, 688, 696, 699, 705, 720, 721, 736, 740, 750, 750, 890, 890, 902, 902, 904, 906, 908, 908, 910, 929, 931, 974, 976, 983, 986, 1011, 1024, 1153, 1164, 1220, 1223, 1224, 1227, 1228, 1232, 1269, 1272, 1273, 1329, 1366, 1369, 1369, 1377, 1415, 1488, 1514, 1520, 1522, 1569, 1594, 1600, 1610, 1649, 1747, 1749, 1749, 1765, 1766, 1786, 1788, 1808, 1808, 1810, 1836, 1920, 1957, 2309, 2361, 2365, 2365, 2384, 2384, 2392, 2401, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482, 2482, 2486, 2489, 2524, 2525, 2527, 2529, 2544, 2545, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613, 2614, 2616, 2617, 2649, 2652, 2654, 2654, 2674, 2676, 2693, 2699, 2701, 2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2749, 2749, 2768, 2768, 2784, 2784, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2870, 2873, 2877, 2877, 2908, 2909, 2911, 2913, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986, 2990, 2997, 2999, 3001, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3123, 3125, 3129, 3168, 3169, 3205, 3212, 3214, 3216, 3218, 3240, 3242, 3251, 3253, 3257, 3294, 3294, 3296, 3297, 3333, 3340, 3342, 3344, 3346, 3368, 3370, 3385, 3424, 3425, 3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3585, 3632, 3634, 3635, 3648, 3654, 3713, 3714, 3716, 3716, 3719, 3720, 3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757, 3760, 3762, 3763, 3773, 3773, 3776, 3780, 3782, 3782, 3804, 3805, 3840, 3840, 3904, 3911, 3913, 3946, 3976, 3979, 4096, 4129, 4131, 4135, 4137, 4138, 4176, 4181, 4256, 4293, 4304, 4342, 4352, 4441, 4447, 4514, 4520, 4601, 4608, 4614, 4616, 4678, 4680, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4742, 4744, 4744, 4746, 4749, 4752, 4782, 4784, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4814, 4816, 4822, 4824, 4846, 4848, 4878, 4880, 4880, 4882, 4885, 4888, 4894, 4896, 4934, 4936, 4954, 5024, 5108, 5121, 5740, 5743, 5750, 5761, 5786, 5792, 5866, 6016, 6067, 6176, 6263, 6272, 6312, 7680, 7835, 7840, 7929, 7936, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8319, 8319, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8473, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8497, 8499, 8505, 8544, 8579, 12293, 12295, 12321, 12329, 12337, 12341, 12344, 12346, 12353, 12436, 12445, 12446, 12449, 12538, 12540, 12542, 12549, 12588, 12593, 12686, 12704, 12727, 13312, 19893, 19968, 40869, 40960, 42124, 44032, 55203, 63744, 64045, 64256, 64262, 64275, 64279, 64285, 64285, 64287, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65136, 65138, 65140, 65140, 65142, 65276, 65313, 65338, 65345, 65370, 65382, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500,];
-    var unicodeES3IdentifierPart = [170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 543, 546, 563, 592, 685, 688, 696, 699, 705, 720, 721, 736, 740, 750, 750, 768, 846, 864, 866, 890, 890, 902, 902, 904, 906, 908, 908, 910, 929, 931, 974, 976, 983, 986, 1011, 1024, 1153, 1155, 1158, 1164, 1220, 1223, 1224, 1227, 1228, 1232, 1269, 1272, 1273, 1329, 1366, 1369, 1369, 1377, 1415, 1425, 1441, 1443, 1465, 1467, 1469, 1471, 1471, 1473, 1474, 1476, 1476, 1488, 1514, 1520, 1522, 1569, 1594, 1600, 1621, 1632, 1641, 1648, 1747, 1749, 1756, 1759, 1768, 1770, 1773, 1776, 1788, 1808, 1836, 1840, 1866, 1920, 1968, 2305, 2307, 2309, 2361, 2364, 2381, 2384, 2388, 2392, 2403, 2406, 2415, 2433, 2435, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482, 2482, 2486, 2489, 2492, 2492, 2494, 2500, 2503, 2504, 2507, 2509, 2519, 2519, 2524, 2525, 2527, 2531, 2534, 2545, 2562, 2562, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613, 2614, 2616, 2617, 2620, 2620, 2622, 2626, 2631, 2632, 2635, 2637, 2649, 2652, 2654, 2654, 2662, 2676, 2689, 2691, 2693, 2699, 2701, 2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2748, 2757, 2759, 2761, 2763, 2765, 2768, 2768, 2784, 2784, 2790, 2799, 2817, 2819, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2870, 2873, 2876, 2883, 2887, 2888, 2891, 2893, 2902, 2903, 2908, 2909, 2911, 2913, 2918, 2927, 2946, 2947, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986, 2990, 2997, 2999, 3001, 3006, 3010, 3014, 3016, 3018, 3021, 3031, 3031, 3047, 3055, 3073, 3075, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3123, 3125, 3129, 3134, 3140, 3142, 3144, 3146, 3149, 3157, 3158, 3168, 3169, 3174, 3183, 3202, 3203, 3205, 3212, 3214, 3216, 3218, 3240, 3242, 3251, 3253, 3257, 3262, 3268, 3270, 3272, 3274, 3277, 3285, 3286, 3294, 3294, 3296, 3297, 3302, 3311, 3330, 3331, 3333, 3340, 3342, 3344, 3346, 3368, 3370, 3385, 3390, 3395, 3398, 3400, 3402, 3405, 3415, 3415, 3424, 3425, 3430, 3439, 3458, 3459, 3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3530, 3530, 3535, 3540, 3542, 3542, 3544, 3551, 3570, 3571, 3585, 3642, 3648, 3662, 3664, 3673, 3713, 3714, 3716, 3716, 3719, 3720, 3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757, 3769, 3771, 3773, 3776, 3780, 3782, 3782, 3784, 3789, 3792, 3801, 3804, 3805, 3840, 3840, 3864, 3865, 3872, 3881, 3893, 3893, 3895, 3895, 3897, 3897, 3902, 3911, 3913, 3946, 3953, 3972, 3974, 3979, 3984, 3991, 3993, 4028, 4038, 4038, 4096, 4129, 4131, 4135, 4137, 4138, 4140, 4146, 4150, 4153, 4160, 4169, 4176, 4185, 4256, 4293, 4304, 4342, 4352, 4441, 4447, 4514, 4520, 4601, 4608, 4614, 4616, 4678, 4680, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4742, 4744, 4744, 4746, 4749, 4752, 4782, 4784, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4814, 4816, 4822, 4824, 4846, 4848, 4878, 4880, 4880, 4882, 4885, 4888, 4894, 4896, 4934, 4936, 4954, 4969, 4977, 5024, 5108, 5121, 5740, 5743, 5750, 5761, 5786, 5792, 5866, 6016, 6099, 6112, 6121, 6160, 6169, 6176, 6263, 6272, 6313, 7680, 7835, 7840, 7929, 7936, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8255, 8256, 8319, 8319, 8400, 8412, 8417, 8417, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8473, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8497, 8499, 8505, 8544, 8579, 12293, 12295, 12321, 12335, 12337, 12341, 12344, 12346, 12353, 12436, 12441, 12442, 12445, 12446, 12449, 12542, 12549, 12588, 12593, 12686, 12704, 12727, 13312, 19893, 19968, 40869, 40960, 42124, 44032, 55203, 63744, 64045, 64256, 64262, 64275, 64279, 64285, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65056, 65059, 65075, 65076, 65101, 65103, 65136, 65138, 65140, 65140, 65142, 65276, 65296, 65305, 65313, 65338, 65343, 65343, 65345, 65370, 65381, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500,];
-    /*
-        As per ECMAScript Language Specification 5th Edition, Section 7.6: ISyntaxToken Names and Identifiers
-        IdentifierStart ::
-            Can contain Unicode 6.2  categories:
-            Uppercase letter (Lu),
-            Lowercase letter (Ll),
-            Titlecase letter (Lt),
-            Modifier letter (Lm),
-            Other letter (Lo), or
-            Letter number (Nl).
-        IdentifierPart ::
-            Can contain IdentifierStart + Unicode 6.2  categories:
-            Non-spacing mark (Mn),
-            Combining spacing mark (Mc),
-            Decimal number (Nd),
-            Connector punctuation (Pc),
-            <ZWNJ>, or
-            <ZWJ>.
-
-        Codepoint ranges for ES5 Identifiers are extracted from the Unicode 6.2 specification at:
-        http://www.unicode.org/Public/6.2.0/ucd/UnicodeData.txt
-    */
-    var unicodeES5IdentifierStart = [170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 705, 710, 721, 736, 740, 748, 748, 750, 750, 880, 884, 886, 887, 890, 893, 902, 902, 904, 906, 908, 908, 910, 929, 931, 1013, 1015, 1153, 1162, 1319, 1329, 1366, 1369, 1369, 1377, 1415, 1488, 1514, 1520, 1522, 1568, 1610, 1646, 1647, 1649, 1747, 1749, 1749, 1765, 1766, 1774, 1775, 1786, 1788, 1791, 1791, 1808, 1808, 1810, 1839, 1869, 1957, 1969, 1969, 1994, 2026, 2036, 2037, 2042, 2042, 2048, 2069, 2074, 2074, 2084, 2084, 2088, 2088, 2112, 2136, 2208, 2208, 2210, 2220, 2308, 2361, 2365, 2365, 2384, 2384, 2392, 2401, 2417, 2423, 2425, 2431, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482, 2482, 2486, 2489, 2493, 2493, 2510, 2510, 2524, 2525, 2527, 2529, 2544, 2545, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613, 2614, 2616, 2617, 2649, 2652, 2654, 2654, 2674, 2676, 2693, 2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2749, 2749, 2768, 2768, 2784, 2785, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2869, 2873, 2877, 2877, 2908, 2909, 2911, 2913, 2929, 2929, 2947, 2947, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986, 2990, 3001, 3024, 3024, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3123, 3125, 3129, 3133, 3133, 3160, 3161, 3168, 3169, 3205, 3212, 3214, 3216, 3218, 3240, 3242, 3251, 3253, 3257, 3261, 3261, 3294, 3294, 3296, 3297, 3313, 3314, 3333, 3340, 3342, 3344, 3346, 3386, 3389, 3389, 3406, 3406, 3424, 3425, 3450, 3455, 3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3585, 3632, 3634, 3635, 3648, 3654, 3713, 3714, 3716, 3716, 3719, 3720, 3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757, 3760, 3762, 3763, 3773, 3773, 3776, 3780, 3782, 3782, 3804, 3807, 3840, 3840, 3904, 3911, 3913, 3948, 3976, 3980, 4096, 4138, 4159, 4159, 4176, 4181, 4186, 4189, 4193, 4193, 4197, 4198, 4206, 4208, 4213, 4225, 4238, 4238, 4256, 4293, 4295, 4295, 4301, 4301, 4304, 4346, 4348, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4744, 4746, 4749, 4752, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4822, 4824, 4880, 4882, 4885, 4888, 4954, 4992, 5007, 5024, 5108, 5121, 5740, 5743, 5759, 5761, 5786, 5792, 5866, 5870, 5872, 5888, 5900, 5902, 5905, 5920, 5937, 5952, 5969, 5984, 5996, 5998, 6000, 6016, 6067, 6103, 6103, 6108, 6108, 6176, 6263, 6272, 6312, 6314, 6314, 6320, 6389, 6400, 6428, 6480, 6509, 6512, 6516, 6528, 6571, 6593, 6599, 6656, 6678, 6688, 6740, 6823, 6823, 6917, 6963, 6981, 6987, 7043, 7072, 7086, 7087, 7098, 7141, 7168, 7203, 7245, 7247, 7258, 7293, 7401, 7404, 7406, 7409, 7413, 7414, 7424, 7615, 7680, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8305, 8305, 8319, 8319, 8336, 8348, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8473, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8505, 8508, 8511, 8517, 8521, 8526, 8526, 8544, 8584, 11264, 11310, 11312, 11358, 11360, 11492, 11499, 11502, 11506, 11507, 11520, 11557, 11559, 11559, 11565, 11565, 11568, 11623, 11631, 11631, 11648, 11670, 11680, 11686, 11688, 11694, 11696, 11702, 11704, 11710, 11712, 11718, 11720, 11726, 11728, 11734, 11736, 11742, 11823, 11823, 12293, 12295, 12321, 12329, 12337, 12341, 12344, 12348, 12353, 12438, 12445, 12447, 12449, 12538, 12540, 12543, 12549, 12589, 12593, 12686, 12704, 12730, 12784, 12799, 13312, 19893, 19968, 40908, 40960, 42124, 42192, 42237, 42240, 42508, 42512, 42527, 42538, 42539, 42560, 42606, 42623, 42647, 42656, 42735, 42775, 42783, 42786, 42888, 42891, 42894, 42896, 42899, 42912, 42922, 43000, 43009, 43011, 43013, 43015, 43018, 43020, 43042, 43072, 43123, 43138, 43187, 43250, 43255, 43259, 43259, 43274, 43301, 43312, 43334, 43360, 43388, 43396, 43442, 43471, 43471, 43520, 43560, 43584, 43586, 43588, 43595, 43616, 43638, 43642, 43642, 43648, 43695, 43697, 43697, 43701, 43702, 43705, 43709, 43712, 43712, 43714, 43714, 43739, 43741, 43744, 43754, 43762, 43764, 43777, 43782, 43785, 43790, 43793, 43798, 43808, 43814, 43816, 43822, 43968, 44002, 44032, 55203, 55216, 55238, 55243, 55291, 63744, 64109, 64112, 64217, 64256, 64262, 64275, 64279, 64285, 64285, 64287, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65136, 65140, 65142, 65276, 65313, 65338, 65345, 65370, 65382, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500,];
-    var unicodeES5IdentifierPart = [170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 705, 710, 721, 736, 740, 748, 748, 750, 750, 768, 884, 886, 887, 890, 893, 902, 902, 904, 906, 908, 908, 910, 929, 931, 1013, 1015, 1153, 1155, 1159, 1162, 1319, 1329, 1366, 1369, 1369, 1377, 1415, 1425, 1469, 1471, 1471, 1473, 1474, 1476, 1477, 1479, 1479, 1488, 1514, 1520, 1522, 1552, 1562, 1568, 1641, 1646, 1747, 1749, 1756, 1759, 1768, 1770, 1788, 1791, 1791, 1808, 1866, 1869, 1969, 1984, 2037, 2042, 2042, 2048, 2093, 2112, 2139, 2208, 2208, 2210, 2220, 2276, 2302, 2304, 2403, 2406, 2415, 2417, 2423, 2425, 2431, 2433, 2435, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482, 2482, 2486, 2489, 2492, 2500, 2503, 2504, 2507, 2510, 2519, 2519, 2524, 2525, 2527, 2531, 2534, 2545, 2561, 2563, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613, 2614, 2616, 2617, 2620, 2620, 2622, 2626, 2631, 2632, 2635, 2637, 2641, 2641, 2649, 2652, 2654, 2654, 2662, 2677, 2689, 2691, 2693, 2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2748, 2757, 2759, 2761, 2763, 2765, 2768, 2768, 2784, 2787, 2790, 2799, 2817, 2819, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2869, 2873, 2876, 2884, 2887, 2888, 2891, 2893, 2902, 2903, 2908, 2909, 2911, 2915, 2918, 2927, 2929, 2929, 2946, 2947, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986, 2990, 3001, 3006, 3010, 3014, 3016, 3018, 3021, 3024, 3024, 3031, 3031, 3046, 3055, 3073, 3075, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3123, 3125, 3129, 3133, 3140, 3142, 3144, 3146, 3149, 3157, 3158, 3160, 3161, 3168, 3171, 3174, 3183, 3202, 3203, 3205, 3212, 3214, 3216, 3218, 3240, 3242, 3251, 3253, 3257, 3260, 3268, 3270, 3272, 3274, 3277, 3285, 3286, 3294, 3294, 3296, 3299, 3302, 3311, 3313, 3314, 3330, 3331, 3333, 3340, 3342, 3344, 3346, 3386, 3389, 3396, 3398, 3400, 3402, 3406, 3415, 3415, 3424, 3427, 3430, 3439, 3450, 3455, 3458, 3459, 3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3530, 3530, 3535, 3540, 3542, 3542, 3544, 3551, 3570, 3571, 3585, 3642, 3648, 3662, 3664, 3673, 3713, 3714, 3716, 3716, 3719, 3720, 3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757, 3769, 3771, 3773, 3776, 3780, 3782, 3782, 3784, 3789, 3792, 3801, 3804, 3807, 3840, 3840, 3864, 3865, 3872, 3881, 3893, 3893, 3895, 3895, 3897, 3897, 3902, 3911, 3913, 3948, 3953, 3972, 3974, 3991, 3993, 4028, 4038, 4038, 4096, 4169, 4176, 4253, 4256, 4293, 4295, 4295, 4301, 4301, 4304, 4346, 4348, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4744, 4746, 4749, 4752, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4822, 4824, 4880, 4882, 4885, 4888, 4954, 4957, 4959, 4992, 5007, 5024, 5108, 5121, 5740, 5743, 5759, 5761, 5786, 5792, 5866, 5870, 5872, 5888, 5900, 5902, 5908, 5920, 5940, 5952, 5971, 5984, 5996, 5998, 6000, 6002, 6003, 6016, 6099, 6103, 6103, 6108, 6109, 6112, 6121, 6155, 6157, 6160, 6169, 6176, 6263, 6272, 6314, 6320, 6389, 6400, 6428, 6432, 6443, 6448, 6459, 6470, 6509, 6512, 6516, 6528, 6571, 6576, 6601, 6608, 6617, 6656, 6683, 6688, 6750, 6752, 6780, 6783, 6793, 6800, 6809, 6823, 6823, 6912, 6987, 6992, 7001, 7019, 7027, 7040, 7155, 7168, 7223, 7232, 7241, 7245, 7293, 7376, 7378, 7380, 7414, 7424, 7654, 7676, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8204, 8205, 8255, 8256, 8276, 8276, 8305, 8305, 8319, 8319, 8336, 8348, 8400, 8412, 8417, 8417, 8421, 8432, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8473, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8505, 8508, 8511, 8517, 8521, 8526, 8526, 8544, 8584, 11264, 11310, 11312, 11358, 11360, 11492, 11499, 11507, 11520, 11557, 11559, 11559, 11565, 11565, 11568, 11623, 11631, 11631, 11647, 11670, 11680, 11686, 11688, 11694, 11696, 11702, 11704, 11710, 11712, 11718, 11720, 11726, 11728, 11734, 11736, 11742, 11744, 11775, 11823, 11823, 12293, 12295, 12321, 12335, 12337, 12341, 12344, 12348, 12353, 12438, 12441, 12442, 12445, 12447, 12449, 12538, 12540, 12543, 12549, 12589, 12593, 12686, 12704, 12730, 12784, 12799, 13312, 19893, 19968, 40908, 40960, 42124, 42192, 42237, 42240, 42508, 42512, 42539, 42560, 42607, 42612, 42621, 42623, 42647, 42655, 42737, 42775, 42783, 42786, 42888, 42891, 42894, 42896, 42899, 42912, 42922, 43000, 43047, 43072, 43123, 43136, 43204, 43216, 43225, 43232, 43255, 43259, 43259, 43264, 43309, 43312, 43347, 43360, 43388, 43392, 43456, 43471, 43481, 43520, 43574, 43584, 43597, 43600, 43609, 43616, 43638, 43642, 43643, 43648, 43714, 43739, 43741, 43744, 43759, 43762, 43766, 43777, 43782, 43785, 43790, 43793, 43798, 43808, 43814, 43816, 43822, 43968, 44010, 44012, 44013, 44016, 44025, 44032, 55203, 55216, 55238, 55243, 55291, 63744, 64109, 64112, 64217, 64256, 64262, 64275, 64279, 64285, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65024, 65039, 65056, 65062, 65075, 65076, 65101, 65103, 65136, 65140, 65142, 65276, 65296, 65305, 65313, 65338, 65343, 65343, 65345, 65370, 65382, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500,];
-    function lookupInUnicodeMap(code, map) {
-        // Bail out quickly if it couldn't possibly be in the map.
-        if (code < map[0]) {
+    ts.createNode = createNode;
+    function visitNode(cbNode, node) {
+        if (node) {
+            return cbNode(node);
+        }
+    }
+    function visitNodeArray(cbNodes, nodes) {
+        if (nodes) {
+            return cbNodes(nodes);
+        }
+    }
+    function visitEachNode(cbNode, nodes) {
+        if (nodes) {
+            for (var _i = 0, nodes_1 = nodes; _i < nodes_1.length; _i++) {
+                var node = nodes_1[_i];
+                var result = cbNode(node);
+                if (result) {
+                    return result;
+                }
+            }
+        }
+    }
+    /**
+     * Invokes a callback for each child of the given node. The 'cbNode' callback is invoked for all child nodes
+     * stored in properties. If a 'cbNodes' callback is specified, it is invoked for embedded arrays; otherwise,
+     * embedded arrays are flattened and the 'cbNode' callback is invoked for each element. If a callback returns
+     * a truthy value, iteration stops and that value is returned. Otherwise, undefined is returned.
+     *
+     * @param node a given node to visit its children
+     * @param cbNode a callback to be invoked for all child nodes
+     * @param cbNodeArray a callback to be invoked for embedded array
+     */
+    function forEachChild(node, cbNode, cbNodeArray) {
+        if (!node) {
+            return;
+        }
+        // The visitXXX functions could be written as local functions that close over the cbNode and cbNodeArray
+        // callback parameters, but that causes a closure allocation for each invocation with noticeable effects
+        // on performance.
+        var visitNodes = cbNodeArray ? visitNodeArray : visitEachNode;
+        var cbNodes = cbNodeArray || cbNode;
+        switch (node.kind) {
+            case 143 /* QualifiedName */:
+                return visitNode(cbNode, node.left) ||
+                    visitNode(cbNode, node.right);
+            case 145 /* TypeParameter */:
+                return visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.constraint) ||
+                    visitNode(cbNode, node.default) ||
+                    visitNode(cbNode, node.expression);
+            case 262 /* ShorthandPropertyAssignment */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.questionToken) ||
+                    visitNode(cbNode, node.equalsToken) ||
+                    visitNode(cbNode, node.objectAssignmentInitializer);
+            case 263 /* SpreadAssignment */:
+                return visitNode(cbNode, node.expression);
+            case 146 /* Parameter */:
+            case 149 /* PropertyDeclaration */:
+            case 148 /* PropertySignature */:
+            case 261 /* PropertyAssignment */:
+            case 226 /* VariableDeclaration */:
+            case 176 /* BindingElement */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.propertyName) ||
+                    visitNode(cbNode, node.dotDotDotToken) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.questionToken) ||
+                    visitNode(cbNode, node.type) ||
+                    visitNode(cbNode, node.initializer);
+            case 160 /* FunctionType */:
+            case 161 /* ConstructorType */:
+            case 155 /* CallSignature */:
+            case 156 /* ConstructSignature */:
+            case 157 /* IndexSignature */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNodes(cbNodes, node.typeParameters) ||
+                    visitNodes(cbNodes, node.parameters) ||
+                    visitNode(cbNode, node.type);
+            case 151 /* MethodDeclaration */:
+            case 150 /* MethodSignature */:
+            case 152 /* Constructor */:
+            case 153 /* GetAccessor */:
+            case 154 /* SetAccessor */:
+            case 186 /* FunctionExpression */:
+            case 228 /* FunctionDeclaration */:
+            case 187 /* ArrowFunction */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.asteriskToken) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.questionToken) ||
+                    visitNodes(cbNodes, node.typeParameters) ||
+                    visitNodes(cbNodes, node.parameters) ||
+                    visitNode(cbNode, node.type) ||
+                    visitNode(cbNode, node.equalsGreaterThanToken) ||
+                    visitNode(cbNode, node.body);
+            case 159 /* TypeReference */:
+                return visitNode(cbNode, node.typeName) ||
+                    visitNodes(cbNodes, node.typeArguments);
+            case 158 /* TypePredicate */:
+                return visitNode(cbNode, node.parameterName) ||
+                    visitNode(cbNode, node.type);
+            case 162 /* TypeQuery */:
+                return visitNode(cbNode, node.exprName);
+            case 163 /* TypeLiteral */:
+                return visitNodes(cbNodes, node.members);
+            case 164 /* ArrayType */:
+                return visitNode(cbNode, node.elementType);
+            case 165 /* TupleType */:
+                return visitNodes(cbNodes, node.elementTypes);
+            case 166 /* UnionType */:
+            case 167 /* IntersectionType */:
+                return visitNodes(cbNodes, node.types);
+            case 168 /* ParenthesizedType */:
+            case 170 /* TypeOperator */:
+                return visitNode(cbNode, node.type);
+            case 171 /* IndexedAccessType */:
+                return visitNode(cbNode, node.objectType) ||
+                    visitNode(cbNode, node.indexType);
+            case 172 /* MappedType */:
+                return visitNode(cbNode, node.readonlyToken) ||
+                    visitNode(cbNode, node.typeParameter) ||
+                    visitNode(cbNode, node.questionToken) ||
+                    visitNode(cbNode, node.type);
+            case 173 /* LiteralType */:
+                return visitNode(cbNode, node.literal);
+            case 174 /* ObjectBindingPattern */:
+            case 175 /* ArrayBindingPattern */:
+                return visitNodes(cbNodes, node.elements);
+            case 177 /* ArrayLiteralExpression */:
+                return visitNodes(cbNodes, node.elements);
+            case 178 /* ObjectLiteralExpression */:
+                return visitNodes(cbNodes, node.properties);
+            case 179 /* PropertyAccessExpression */:
+                return visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.name);
+            case 180 /* ElementAccessExpression */:
+                return visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.argumentExpression);
+            case 181 /* CallExpression */:
+            case 182 /* NewExpression */:
+                return visitNode(cbNode, node.expression) ||
+                    visitNodes(cbNodes, node.typeArguments) ||
+                    visitNodes(cbNodes, node.arguments);
+            case 183 /* TaggedTemplateExpression */:
+                return visitNode(cbNode, node.tag) ||
+                    visitNode(cbNode, node.template);
+            case 184 /* TypeAssertionExpression */:
+                return visitNode(cbNode, node.type) ||
+                    visitNode(cbNode, node.expression);
+            case 185 /* ParenthesizedExpression */:
+                return visitNode(cbNode, node.expression);
+            case 188 /* DeleteExpression */:
+                return visitNode(cbNode, node.expression);
+            case 189 /* TypeOfExpression */:
+                return visitNode(cbNode, node.expression);
+            case 190 /* VoidExpression */:
+                return visitNode(cbNode, node.expression);
+            case 192 /* PrefixUnaryExpression */:
+                return visitNode(cbNode, node.operand);
+            case 197 /* YieldExpression */:
+                return visitNode(cbNode, node.asteriskToken) ||
+                    visitNode(cbNode, node.expression);
+            case 191 /* AwaitExpression */:
+                return visitNode(cbNode, node.expression);
+            case 193 /* PostfixUnaryExpression */:
+                return visitNode(cbNode, node.operand);
+            case 194 /* BinaryExpression */:
+                return visitNode(cbNode, node.left) ||
+                    visitNode(cbNode, node.operatorToken) ||
+                    visitNode(cbNode, node.right);
+            case 202 /* AsExpression */:
+                return visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.type);
+            case 203 /* NonNullExpression */:
+                return visitNode(cbNode, node.expression);
+            case 204 /* MetaProperty */:
+                return visitNode(cbNode, node.name);
+            case 195 /* ConditionalExpression */:
+                return visitNode(cbNode, node.condition) ||
+                    visitNode(cbNode, node.questionToken) ||
+                    visitNode(cbNode, node.whenTrue) ||
+                    visitNode(cbNode, node.colonToken) ||
+                    visitNode(cbNode, node.whenFalse);
+            case 198 /* SpreadElement */:
+                return visitNode(cbNode, node.expression);
+            case 207 /* Block */:
+            case 234 /* ModuleBlock */:
+                return visitNodes(cbNodes, node.statements);
+            case 265 /* SourceFile */:
+                return visitNodes(cbNodes, node.statements) ||
+                    visitNode(cbNode, node.endOfFileToken);
+            case 208 /* VariableStatement */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.declarationList);
+            case 227 /* VariableDeclarationList */:
+                return visitNodes(cbNodes, node.declarations);
+            case 210 /* ExpressionStatement */:
+                return visitNode(cbNode, node.expression);
+            case 211 /* IfStatement */:
+                return visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.thenStatement) ||
+                    visitNode(cbNode, node.elseStatement);
+            case 212 /* DoStatement */:
+                return visitNode(cbNode, node.statement) ||
+                    visitNode(cbNode, node.expression);
+            case 213 /* WhileStatement */:
+                return visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.statement);
+            case 214 /* ForStatement */:
+                return visitNode(cbNode, node.initializer) ||
+                    visitNode(cbNode, node.condition) ||
+                    visitNode(cbNode, node.incrementor) ||
+                    visitNode(cbNode, node.statement);
+            case 215 /* ForInStatement */:
+                return visitNode(cbNode, node.initializer) ||
+                    visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.statement);
+            case 216 /* ForOfStatement */:
+                return visitNode(cbNode, node.awaitModifier) ||
+                    visitNode(cbNode, node.initializer) ||
+                    visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.statement);
+            case 217 /* ContinueStatement */:
+            case 218 /* BreakStatement */:
+                return visitNode(cbNode, node.label);
+            case 219 /* ReturnStatement */:
+                return visitNode(cbNode, node.expression);
+            case 220 /* WithStatement */:
+                return visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.statement);
+            case 221 /* SwitchStatement */:
+                return visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.caseBlock);
+            case 235 /* CaseBlock */:
+                return visitNodes(cbNodes, node.clauses);
+            case 257 /* CaseClause */:
+                return visitNode(cbNode, node.expression) ||
+                    visitNodes(cbNodes, node.statements);
+            case 258 /* DefaultClause */:
+                return visitNodes(cbNodes, node.statements);
+            case 222 /* LabeledStatement */:
+                return visitNode(cbNode, node.label) ||
+                    visitNode(cbNode, node.statement);
+            case 223 /* ThrowStatement */:
+                return visitNode(cbNode, node.expression);
+            case 224 /* TryStatement */:
+                return visitNode(cbNode, node.tryBlock) ||
+                    visitNode(cbNode, node.catchClause) ||
+                    visitNode(cbNode, node.finallyBlock);
+            case 260 /* CatchClause */:
+                return visitNode(cbNode, node.variableDeclaration) ||
+                    visitNode(cbNode, node.block);
+            case 147 /* Decorator */:
+                return visitNode(cbNode, node.expression);
+            case 229 /* ClassDeclaration */:
+            case 199 /* ClassExpression */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNodes(cbNodes, node.typeParameters) ||
+                    visitNodes(cbNodes, node.heritageClauses) ||
+                    visitNodes(cbNodes, node.members);
+            case 230 /* InterfaceDeclaration */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNodes(cbNodes, node.typeParameters) ||
+                    visitNodes(cbNodes, node.heritageClauses) ||
+                    visitNodes(cbNodes, node.members);
+            case 231 /* TypeAliasDeclaration */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNodes(cbNodes, node.typeParameters) ||
+                    visitNode(cbNode, node.type);
+            case 232 /* EnumDeclaration */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNodes(cbNodes, node.members);
+            case 264 /* EnumMember */:
+                return visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.initializer);
+            case 233 /* ModuleDeclaration */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.body);
+            case 237 /* ImportEqualsDeclaration */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.moduleReference);
+            case 238 /* ImportDeclaration */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.importClause) ||
+                    visitNode(cbNode, node.moduleSpecifier);
+            case 239 /* ImportClause */:
+                return visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.namedBindings);
+            case 236 /* NamespaceExportDeclaration */:
+                return visitNode(cbNode, node.name);
+            case 240 /* NamespaceImport */:
+                return visitNode(cbNode, node.name);
+            case 241 /* NamedImports */:
+            case 245 /* NamedExports */:
+                return visitNodes(cbNodes, node.elements);
+            case 244 /* ExportDeclaration */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.exportClause) ||
+                    visitNode(cbNode, node.moduleSpecifier);
+            case 242 /* ImportSpecifier */:
+            case 246 /* ExportSpecifier */:
+                return visitNode(cbNode, node.propertyName) ||
+                    visitNode(cbNode, node.name);
+            case 243 /* ExportAssignment */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.expression);
+            case 196 /* TemplateExpression */:
+                return visitNode(cbNode, node.head) || visitNodes(cbNodes, node.templateSpans);
+            case 205 /* TemplateSpan */:
+                return visitNode(cbNode, node.expression) || visitNode(cbNode, node.literal);
+            case 144 /* ComputedPropertyName */:
+                return visitNode(cbNode, node.expression);
+            case 259 /* HeritageClause */:
+                return visitNodes(cbNodes, node.types);
+            case 201 /* ExpressionWithTypeArguments */:
+                return visitNode(cbNode, node.expression) ||
+                    visitNodes(cbNodes, node.typeArguments);
+            case 248 /* ExternalModuleReference */:
+                return visitNode(cbNode, node.expression);
+            case 247 /* MissingDeclaration */:
+                return visitNodes(cbNodes, node.decorators);
+            case 298 /* CommaListExpression */:
+                return visitNodes(cbNodes, node.elements);
+            case 249 /* JsxElement */:
+                return visitNode(cbNode, node.openingElement) ||
+                    visitNodes(cbNodes, node.children) ||
+                    visitNode(cbNode, node.closingElement);
+            case 250 /* JsxSelfClosingElement */:
+            case 251 /* JsxOpeningElement */:
+                return visitNode(cbNode, node.tagName) ||
+                    visitNode(cbNode, node.attributes);
+            case 254 /* JsxAttributes */:
+                return visitNodes(cbNodes, node.properties);
+            case 253 /* JsxAttribute */:
+                return visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.initializer);
+            case 255 /* JsxSpreadAttribute */:
+                return visitNode(cbNode, node.expression);
+            case 256 /* JsxExpression */:
+                return visitNode(cbNode, node.dotDotDotToken) ||
+                    visitNode(cbNode, node.expression);
+            case 252 /* JsxClosingElement */:
+                return visitNode(cbNode, node.tagName);
+            case 267 /* JSDocTypeExpression */:
+                return visitNode(cbNode, node.type);
+            case 271 /* JSDocUnionType */:
+                return visitNodes(cbNodes, node.types);
+            case 272 /* JSDocTupleType */:
+                return visitNodes(cbNodes, node.types);
+            case 270 /* JSDocArrayType */:
+                return visitNode(cbNode, node.elementType);
+            case 274 /* JSDocNonNullableType */:
+                return visitNode(cbNode, node.type);
+            case 273 /* JSDocNullableType */:
+                return visitNode(cbNode, node.type);
+            case 275 /* JSDocRecordType */:
+                return visitNode(cbNode, node.literal);
+            case 277 /* JSDocTypeReference */:
+                return visitNode(cbNode, node.name) ||
+                    visitNodes(cbNodes, node.typeArguments);
+            case 278 /* JSDocOptionalType */:
+                return visitNode(cbNode, node.type);
+            case 279 /* JSDocFunctionType */:
+                return visitNodes(cbNodes, node.parameters) ||
+                    visitNode(cbNode, node.type);
+            case 280 /* JSDocVariadicType */:
+                return visitNode(cbNode, node.type);
+            case 281 /* JSDocConstructorType */:
+                return visitNode(cbNode, node.type);
+            case 282 /* JSDocThisType */:
+                return visitNode(cbNode, node.type);
+            case 276 /* JSDocRecordMember */:
+                return visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.type);
+            case 283 /* JSDocComment */:
+                return visitNodes(cbNodes, node.tags);
+            case 287 /* JSDocParameterTag */:
+                return visitNode(cbNode, node.preParameterName) ||
+                    visitNode(cbNode, node.typeExpression) ||
+                    visitNode(cbNode, node.postParameterName);
+            case 288 /* JSDocReturnTag */:
+                return visitNode(cbNode, node.typeExpression);
+            case 289 /* JSDocTypeTag */:
+                return visitNode(cbNode, node.typeExpression);
+            case 285 /* JSDocAugmentsTag */:
+                return visitNode(cbNode, node.typeExpression);
+            case 290 /* JSDocTemplateTag */:
+                return visitNodes(cbNodes, node.typeParameters);
+            case 291 /* JSDocTypedefTag */:
+                return visitNode(cbNode, node.typeExpression) ||
+                    visitNode(cbNode, node.fullName) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.jsDocTypeLiteral);
+            case 293 /* JSDocTypeLiteral */:
+                return visitNodes(cbNodes, node.jsDocPropertyTags);
+            case 292 /* JSDocPropertyTag */:
+                return visitNode(cbNode, node.typeExpression) ||
+                    visitNode(cbNode, node.name);
+            case 297 /* PartiallyEmittedExpression */:
+                return visitNode(cbNode, node.expression);
+            case 294 /* JSDocLiteralType */:
+                return visitNode(cbNode, node.literal);
+        }
+    }
+    ts.forEachChild = forEachChild;
+    function createSourceFile(fileName, sourceText, languageVersion, setParentNodes, scriptKind) {
+        if (setParentNodes === void 0) { setParentNodes = false; }
+        ts.performance.mark("beforeParse");
+        var result = Parser.parseSourceFile(fileName, sourceText, languageVersion, /*syntaxCursor*/ undefined, setParentNodes, scriptKind);
+        ts.performance.mark("afterParse");
+        ts.performance.measure("Parse", "beforeParse", "afterParse");
+        return result;
+    }
+    ts.createSourceFile = createSourceFile;
+    function parseIsolatedEntityName(text, languageVersion) {
+        return Parser.parseIsolatedEntityName(text, languageVersion);
+    }
+    ts.parseIsolatedEntityName = parseIsolatedEntityName;
+    /**
+     * Parse json text into SyntaxTree and return node and parse errors if any
+     * @param fileName
+     * @param sourceText
+     */
+    function parseJsonText(fileName, sourceText) {
+        return Parser.parseJsonText(fileName, sourceText);
+    }
+    ts.parseJsonText = parseJsonText;
+    // See also `isExternalOrCommonJsModule` in utilities.ts
+    function isExternalModule(file) {
+        return file.externalModuleIndicator !== undefined;
+    }
+    ts.isExternalModule = isExternalModule;
+    // Produces a new SourceFile for the 'newText' provided. The 'textChangeRange' parameter
+    // indicates what changed between the 'text' that this SourceFile has and the 'newText'.
+    // The SourceFile will be created with the compiler attempting to reuse as many nodes from
+    // this file as possible.
+    //
+    // Note: this function mutates nodes from this SourceFile. That means any existing nodes
+    // from this SourceFile that are being held onto may change as a result (including
+    // becoming detached from any SourceFile).  It is recommended that this SourceFile not
+    // be used once 'update' is called on it.
+    function updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks) {
+        var newSourceFile = IncrementalParser.updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks);
+        // Because new source file node is created, it may not have the flag PossiblyContainDynamicImport. This is the case if there is no new edit to add dynamic import.
+        // We will manually port the flag to the new source file.
+        newSourceFile.flags |= (sourceFile.flags & 524288 /* PossiblyContainsDynamicImport */);
+        return newSourceFile;
+    }
+    ts.updateSourceFile = updateSourceFile;
+    /* @internal */
+    function parseIsolatedJSDocComment(content, start, length) {
+        var result = Parser.JSDocParser.parseIsolatedJSDocComment(content, start, length);
+        if (result && result.jsDoc) {
+            // because the jsDocComment was parsed out of the source file, it might
+            // not be covered by the fixupParentReferences.
+            Parser.fixupParentReferences(result.jsDoc);
+        }
+        return result;
+    }
+    ts.parseIsolatedJSDocComment = parseIsolatedJSDocComment;
+    /* @internal */
+    // Exposed only for testing.
+    function parseJSDocTypeExpressionForTests(content, start, length) {
+        return Parser.JSDocParser.parseJSDocTypeExpressionForTests(content, start, length);
+    }
+    ts.parseJSDocTypeExpressionForTests = parseJSDocTypeExpressionForTests;
+    // Implement the parser as a singleton module.  We do this for perf reasons because creating
+    // parser instances can actually be expensive enough to impact us on projects with many source
+    // files.
+    var Parser;
+    (function (Parser) {
+        // Share a single scanner across all calls to parse a source file.  This helps speed things
+        // up by avoiding the cost of creating/compiling scanners over and over again.
+        var scanner = ts.createScanner(5 /* Latest */, /*skipTrivia*/ true);
+        var disallowInAndDecoratorContext = 2048 /* DisallowInContext */ | 8192 /* DecoratorContext */;
+        // capture constructors in 'initializeState' to avoid null checks
+        var NodeConstructor;
+        var TokenConstructor;
+        var IdentifierConstructor;
+        var SourceFileConstructor;
+        var sourceFile;
+        var parseDiagnostics;
+        var syntaxCursor;
+        var currentToken;
+        var sourceText;
+        var nodeCount;
+        var identifiers;
+        var identifierCount;
+        var parsingContext;
+        // Flags that dictate what parsing context we're in.  For example:
+        // Whether or not we are in strict parsing mode.  All that changes in strict parsing mode is
+        // that some tokens that would be considered identifiers may be considered keywords.
+        //
+        // When adding more parser context flags, consider which is the more common case that the
+        // flag will be in.  This should be the 'false' state for that flag.  The reason for this is
+        // that we don't store data in our nodes unless the value is in the *non-default* state.  So,
+        // for example, more often than code 'allows-in' (or doesn't 'disallow-in').  We opt for
+        // 'disallow-in' set to 'false'.  Otherwise, if we had 'allowsIn' set to 'true', then almost
+        // all nodes would need extra state on them to store this info.
+        //
+        // Note:  'allowIn' and 'allowYield' track 1:1 with the [in] and [yield] concepts in the ES6
+        // grammar specification.
+        //
+        // An important thing about these context concepts.  By default they are effectively inherited
+        // while parsing through every grammar production.  i.e. if you don't change them, then when
+        // you parse a sub-production, it will have the same context values as the parent production.
+        // This is great most of the time.  After all, consider all the 'expression' grammar productions
+        // and how nearly all of them pass along the 'in' and 'yield' context values:
+        //
+        // EqualityExpression[In, Yield] :
+        //      RelationalExpression[?In, ?Yield]
+        //      EqualityExpression[?In, ?Yield] == RelationalExpression[?In, ?Yield]
+        //      EqualityExpression[?In, ?Yield] != RelationalExpression[?In, ?Yield]
+        //      EqualityExpression[?In, ?Yield] === RelationalExpression[?In, ?Yield]
+        //      EqualityExpression[?In, ?Yield] !== RelationalExpression[?In, ?Yield]
+        //
+        // Where you have to be careful is then understanding what the points are in the grammar
+        // where the values are *not* passed along.  For example:
+        //
+        // SingleNameBinding[Yield,GeneratorParameter]
+        //      [+GeneratorParameter]BindingIdentifier[Yield] Initializer[In]opt
+        //      [~GeneratorParameter]BindingIdentifier[?Yield]Initializer[In, ?Yield]opt
+        //
+        // Here this is saying that if the GeneratorParameter context flag is set, that we should
+        // explicitly set the 'yield' context flag to false before calling into the BindingIdentifier
+        // and we should explicitly unset the 'yield' context flag before calling into the Initializer.
+        // production.  Conversely, if the GeneratorParameter context flag is not set, then we
+        // should leave the 'yield' context flag alone.
+        //
+        // Getting this all correct is tricky and requires careful reading of the grammar to
+        // understand when these values should be changed versus when they should be inherited.
+        //
+        // Note: it should not be necessary to save/restore these flags during speculative/lookahead
+        // parsing.  These context flags are naturally stored and restored through normal recursive
+        // descent parsing and unwinding.
+        var contextFlags;
+        // Whether or not we've had a parse error since creating the last AST node.  If we have
+        // encountered an error, it will be stored on the next AST node we create.  Parse errors
+        // can be broken down into three categories:
+        //
+        // 1) An error that occurred during scanning.  For example, an unterminated literal, or a
+        //    character that was completely not understood.
+        //
+        // 2) A token was expected, but was not present.  This type of error is commonly produced
+        //    by the 'parseExpected' function.
+        //
+        // 3) A token was present that no parsing function was able to consume.  This type of error
+        //    only occurs in the 'abortParsingListOrMoveToNextToken' function when the parser
+        //    decides to skip the token.
+        //
+        // In all of these cases, we want to mark the next node as having had an error before it.
+        // With this mark, we can know in incremental settings if this node can be reused, or if
+        // we have to reparse it.  If we don't keep this information around, we may just reuse the
+        // node.  in that event we would then not produce the same errors as we did before, causing
+        // significant confusion problems.
+        //
+        // Note: it is necessary that this value be saved/restored during speculative/lookahead
+        // parsing.  During lookahead parsing, we will often create a node.  That node will have
+        // this value attached, and then this value will be set back to 'false'.  If we decide to
+        // rewind, we must get back to the same value we had prior to the lookahead.
+        //
+        // Note: any errors at the end of the file that do not precede a regular node, should get
+        // attached to the EOF token.
+        var parseErrorBeforeNextFinishedNode = false;
+        function parseSourceFile(fileName, sourceText, languageVersion, syntaxCursor, setParentNodes, scriptKind) {
+            scriptKind = ts.ensureScriptKind(fileName, scriptKind);
+            initializeState(sourceText, languageVersion, syntaxCursor, scriptKind);
+            var result = parseSourceFileWorker(fileName, languageVersion, setParentNodes, scriptKind);
+            clearState();
+            return result;
+        }
+        Parser.parseSourceFile = parseSourceFile;
+        function parseIsolatedEntityName(content, languageVersion) {
+            initializeState(content, languageVersion, /*syntaxCursor*/ undefined, 1 /* JS */);
+            // Prime the scanner.
+            nextToken();
+            var entityName = parseEntityName(/*allowReservedWords*/ true);
+            var isInvalid = token() === 1 /* EndOfFileToken */ && !parseDiagnostics.length;
+            clearState();
+            return isInvalid ? entityName : undefined;
+        }
+        Parser.parseIsolatedEntityName = parseIsolatedEntityName;
+        function parseJsonText(fileName, sourceText) {
+            initializeState(sourceText, 2 /* ES2015 */, /*syntaxCursor*/ undefined, 6 /* JSON */);
+            // Set source file so that errors will be reported with this file name
+            sourceFile = createSourceFile(fileName, 2 /* ES2015 */, 6 /* JSON */);
+            var result = sourceFile;
+            // Prime the scanner.
+            nextToken();
+            if (token() === 1 /* EndOfFileToken */) {
+                sourceFile.endOfFileToken = parseTokenNode();
+            }
+            else if (token() === 17 /* OpenBraceToken */ ||
+                lookAhead(function () { return token() === 9 /* StringLiteral */; })) {
+                result.jsonObject = parseObjectLiteralExpression();
+                sourceFile.endOfFileToken = parseExpectedToken(1 /* EndOfFileToken */, /*reportAtCurrentPosition*/ false, ts.Diagnostics.Unexpected_token);
+            }
+            else {
+                parseExpected(17 /* OpenBraceToken */);
+            }
+            sourceFile.parseDiagnostics = parseDiagnostics;
+            clearState();
+            return result;
+        }
+        Parser.parseJsonText = parseJsonText;
+        function getLanguageVariant(scriptKind) {
+            // .tsx and .jsx files are treated as jsx language variant.
+            return scriptKind === 4 /* TSX */ || scriptKind === 2 /* JSX */ || scriptKind === 1 /* JS */ || scriptKind === 6 /* JSON */ ? 1 /* JSX */ : 0 /* Standard */;
+        }
+        function initializeState(_sourceText, languageVersion, _syntaxCursor, scriptKind) {
+            NodeConstructor = ts.objectAllocator.getNodeConstructor();
+            TokenConstructor = ts.objectAllocator.getTokenConstructor();
+            IdentifierConstructor = ts.objectAllocator.getIdentifierConstructor();
+            SourceFileConstructor = ts.objectAllocator.getSourceFileConstructor();
+            sourceText = _sourceText;
+            syntaxCursor = _syntaxCursor;
+            parseDiagnostics = [];
+            parsingContext = 0;
+            identifiers = ts.createMap();
+            identifierCount = 0;
+            nodeCount = 0;
+            contextFlags = scriptKind === 1 /* JS */ || scriptKind === 2 /* JSX */ || scriptKind === 6 /* JSON */ ? 65536 /* JavaScriptFile */ : 0 /* None */;
+            parseErrorBeforeNextFinishedNode = false;
+            // Initialize and prime the scanner before parsing the source elements.
+            scanner.setText(sourceText);
+            scanner.setOnError(scanError);
+            scanner.setScriptTarget(languageVersion);
+            scanner.setLanguageVariant(getLanguageVariant(scriptKind));
+        }
+        function clearState() {
+            // Clear out the text the scanner is pointing at, so it doesn't keep anything alive unnecessarily.
+            scanner.setText("");
+            scanner.setOnError(undefined);
+            // Clear any data.  We don't want to accidentally hold onto it for too long.
+            parseDiagnostics = undefined;
+            sourceFile = undefined;
+            identifiers = undefined;
+            syntaxCursor = undefined;
+            sourceText = undefined;
+        }
+        function parseSourceFileWorker(fileName, languageVersion, setParentNodes, scriptKind) {
+            sourceFile = createSourceFile(fileName, languageVersion, scriptKind);
+            sourceFile.flags = contextFlags;
+            // Prime the scanner.
+            nextToken();
+            processReferenceComments(sourceFile);
+            sourceFile.statements = parseList(0 /* SourceElements */, parseStatement);
+            ts.Debug.assert(token() === 1 /* EndOfFileToken */);
+            sourceFile.endOfFileToken = addJSDocComment(parseTokenNode());
+            setExternalModuleIndicator(sourceFile);
+            sourceFile.nodeCount = nodeCount;
+            sourceFile.identifierCount = identifierCount;
+            sourceFile.identifiers = identifiers;
+            sourceFile.parseDiagnostics = parseDiagnostics;
+            if (setParentNodes) {
+                fixupParentReferences(sourceFile);
+            }
+            return sourceFile;
+        }
+        function addJSDocComment(node) {
+            var comments = ts.getJSDocCommentRanges(node, sourceFile.text);
+            if (comments) {
+                for (var _i = 0, comments_2 = comments; _i < comments_2.length; _i++) {
+                    var comment = comments_2[_i];
+                    var jsDoc = JSDocParser.parseJSDocComment(node, comment.pos, comment.end - comment.pos);
+                    if (!jsDoc) {
+                        continue;
+                    }
+                    if (!node.jsDoc) {
+                        node.jsDoc = [];
+                    }
+                    node.jsDoc.push(jsDoc);
+                }
+            }
+            return node;
+        }
+        function fixupParentReferences(rootNode) {
+            // normally parent references are set during binding. However, for clients that only need
+            // a syntax tree, and no semantic features, then the binding process is an unnecessary
+            // overhead.  This functions allows us to set all the parents, without all the expense of
+            // binding.
+            var parent = rootNode;
+            forEachChild(rootNode, visitNode);
+            return;
+            function visitNode(n) {
+                // walk down setting parents that differ from the parent we think it should be.  This
+                // allows us to quickly bail out of setting parents for subtrees during incremental
+                // parsing
+                if (n.parent !== parent) {
+                    n.parent = parent;
+                    var saveParent = parent;
+                    parent = n;
+                    forEachChild(n, visitNode);
+                    if (n.jsDoc) {
+                        for (var _i = 0, _a = n.jsDoc; _i < _a.length; _i++) {
+                            var jsDoc = _a[_i];
+                            jsDoc.parent = n;
+                            parent = jsDoc;
+                            forEachChild(jsDoc, visitNode);
+                        }
+                    }
+                    parent = saveParent;
+                }
+            }
+        }
+        Parser.fixupParentReferences = fixupParentReferences;
+        function createSourceFile(fileName, languageVersion, scriptKind) {
+            // code from createNode is inlined here so createNode won't have to deal with special case of creating source files
+            // this is quite rare comparing to other nodes and createNode should be as fast as possible
+            var sourceFile = new SourceFileConstructor(265 /* SourceFile */, /*pos*/ 0, /* end */ sourceText.length);
+            nodeCount++;
+            sourceFile.text = sourceText;
+            sourceFile.bindDiagnostics = [];
+            sourceFile.languageVersion = languageVersion;
+            sourceFile.fileName = ts.normalizePath(fileName);
+            sourceFile.languageVariant = getLanguageVariant(scriptKind);
+            sourceFile.isDeclarationFile = ts.fileExtensionIs(sourceFile.fileName, ".d.ts" /* Dts */);
+            sourceFile.scriptKind = scriptKind;
+            return sourceFile;
+        }
+        function setContextFlag(val, flag) {
+            if (val) {
+                contextFlags |= flag;
+            }
+            else {
+                contextFlags &= ~flag;
+            }
+        }
+        function setDisallowInContext(val) {
+            setContextFlag(val, 2048 /* DisallowInContext */);
+        }
+        function setYieldContext(val) {
+            setContextFlag(val, 4096 /* YieldContext */);
+        }
+        function setDecoratorContext(val) {
+            setContextFlag(val, 8192 /* DecoratorContext */);
+        }
+        function setAwaitContext(val) {
+            setContextFlag(val, 16384 /* AwaitContext */);
+        }
+        function doOutsideOfContext(context, func) {
+            // contextFlagsToClear will contain only the context flags that are
+            // currently set that we need to temporarily clear
+            // We don't just blindly reset to the previous flags to ensure
+            // that we do not mutate cached flags for the incremental
+            // parser (ThisNodeHasError, ThisNodeOrAnySubNodesHasError, and
+            // HasAggregatedChildData).
+            var contextFlagsToClear = context & contextFlags;
+            if (contextFlagsToClear) {
+                // clear the requested context flags
+                setContextFlag(/*val*/ false, contextFlagsToClear);
+                var result = func();
+                // restore the context flags we just cleared
+                setContextFlag(/*val*/ true, contextFlagsToClear);
+                return result;
+            }
+            // no need to do anything special as we are not in any of the requested contexts
+            return func();
+        }
+        function doInsideOfContext(context, func) {
+            // contextFlagsToSet will contain only the context flags that
+            // are not currently set that we need to temporarily enable.
+            // We don't just blindly reset to the previous flags to ensure
+            // that we do not mutate cached flags for the incremental
+            // parser (ThisNodeHasError, ThisNodeOrAnySubNodesHasError, and
+            // HasAggregatedChildData).
+            var contextFlagsToSet = context & ~contextFlags;
+            if (contextFlagsToSet) {
+                // set the requested context flags
+                setContextFlag(/*val*/ true, contextFlagsToSet);
+                var result = func();
+                // reset the context flags we just set
+                setContextFlag(/*val*/ false, contextFlagsToSet);
+                return result;
+            }
+            // no need to do anything special as we are already in all of the requested contexts
+            return func();
+        }
+        function allowInAnd(func) {
+            return doOutsideOfContext(2048 /* DisallowInContext */, func);
+        }
+        function disallowInAnd(func) {
+            return doInsideOfContext(2048 /* DisallowInContext */, func);
+        }
+        function doInYieldContext(func) {
+            return doInsideOfContext(4096 /* YieldContext */, func);
+        }
+        function doInDecoratorContext(func) {
+            return doInsideOfContext(8192 /* DecoratorContext */, func);
+        }
+        function doInAwaitContext(func) {
+            return doInsideOfContext(16384 /* AwaitContext */, func);
+        }
+        function doOutsideOfAwaitContext(func) {
+            return doOutsideOfContext(16384 /* AwaitContext */, func);
+        }
+        function doInYieldAndAwaitContext(func) {
+            return doInsideOfContext(4096 /* YieldContext */ | 16384 /* AwaitContext */, func);
+        }
+        function inContext(flags) {
+            return (contextFlags & flags) !== 0;
+        }
+        function inYieldContext() {
+            return inContext(4096 /* YieldContext */);
+        }
+        function inDisallowInContext() {
+            return inContext(2048 /* DisallowInContext */);
+        }
+        function inDecoratorContext() {
+            return inContext(8192 /* DecoratorContext */);
+        }
+        function inAwaitContext() {
+            return inContext(16384 /* AwaitContext */);
+        }
+        function parseErrorAtCurrentToken(message, arg0) {
+            var start = scanner.getTokenPos();
+            var length = scanner.getTextPos() - start;
+            parseErrorAtPosition(start, length, message, arg0);
+        }
+        function parseErrorAtPosition(start, length, message, arg0) {
+            // Don't report another error if it would just be at the same position as the last error.
+            var lastError = ts.lastOrUndefined(parseDiagnostics);
+            if (!lastError || start !== lastError.start) {
+                parseDiagnostics.push(ts.createFileDiagnostic(sourceFile, start, length, message, arg0));
+            }
+            // Mark that we've encountered an error.  We'll set an appropriate bit on the next
+            // node we finish so that it can't be reused incrementally.
+            parseErrorBeforeNextFinishedNode = true;
+        }
+        function scanError(message, length) {
+            var pos = scanner.getTextPos();
+            parseErrorAtPosition(pos, length || 0, message);
+        }
+        function getNodePos() {
+            return scanner.getStartPos();
+        }
+        function getNodeEnd() {
+            return scanner.getStartPos();
+        }
+        // Use this function to access the current token instead of reading the currentToken
+        // variable. Since function results aren't narrowed in control flow analysis, this ensures
+        // that the type checker doesn't make wrong assumptions about the type of the current
+        // token (e.g. a call to nextToken() changes the current token but the checker doesn't
+        // reason about this side effect).  Mainstream VMs inline simple functions like this, so
+        // there is no performance penalty.
+        function token() {
+            return currentToken;
+        }
+        function nextToken() {
+            return currentToken = scanner.scan();
+        }
+        function reScanGreaterToken() {
+            return currentToken = scanner.reScanGreaterToken();
+        }
+        function reScanSlashToken() {
+            return currentToken = scanner.reScanSlashToken();
+        }
+        function reScanTemplateToken() {
+            return currentToken = scanner.reScanTemplateToken();
+        }
+        function scanJsxIdentifier() {
+            return currentToken = scanner.scanJsxIdentifier();
+        }
+        function scanJsxText() {
+            return currentToken = scanner.scanJsxToken();
+        }
+        function scanJsxAttributeValue() {
+            return currentToken = scanner.scanJsxAttributeValue();
+        }
+        function speculationHelper(callback, isLookAhead) {
+            // Keep track of the state we'll need to rollback to if lookahead fails (or if the
+            // caller asked us to always reset our state).
+            var saveToken = currentToken;
+            var saveParseDiagnosticsLength = parseDiagnostics.length;
+            var saveParseErrorBeforeNextFinishedNode = parseErrorBeforeNextFinishedNode;
+            // Note: it is not actually necessary to save/restore the context flags here.  That's
+            // because the saving/restoring of these flags happens naturally through the recursive
+            // descent nature of our parser.  However, we still store this here just so we can
+            // assert that invariant holds.
+            var saveContextFlags = contextFlags;
+            // If we're only looking ahead, then tell the scanner to only lookahead as well.
+            // Otherwise, if we're actually speculatively parsing, then tell the scanner to do the
+            // same.
+            var result = isLookAhead
+                ? scanner.lookAhead(callback)
+                : scanner.tryScan(callback);
+            ts.Debug.assert(saveContextFlags === contextFlags);
+            // If our callback returned something 'falsy' or we're just looking ahead,
+            // then unconditionally restore us to where we were.
+            if (!result || isLookAhead) {
+                currentToken = saveToken;
+                parseDiagnostics.length = saveParseDiagnosticsLength;
+                parseErrorBeforeNextFinishedNode = saveParseErrorBeforeNextFinishedNode;
+            }
+            return result;
+        }
+        /** Invokes the provided callback then unconditionally restores the parser to the state it
+         * was in immediately prior to invoking the callback.  The result of invoking the callback
+         * is returned from this function.
+         */
+        function lookAhead(callback) {
+            return speculationHelper(callback, /*isLookAhead*/ true);
+        }
+        /** Invokes the provided callback.  If the callback returns something falsy, then it restores
+         * the parser to the state it was in immediately prior to invoking the callback.  If the
+         * callback returns something truthy, then the parser state is not rolled back.  The result
+         * of invoking the callback is returned from this function.
+         */
+        function tryParse(callback) {
+            return speculationHelper(callback, /*isLookAhead*/ false);
+        }
+        // Ignore strict mode flag because we will report an error in type checker instead.
+        function isIdentifier() {
+            if (token() === 71 /* Identifier */) {
+                return true;
+            }
+            // If we have a 'yield' keyword, and we're in the [yield] context, then 'yield' is
+            // considered a keyword and is not an identifier.
+            if (token() === 116 /* YieldKeyword */ && inYieldContext()) {
+                return false;
+            }
+            // If we have a 'await' keyword, and we're in the [Await] context, then 'await' is
+            // considered a keyword and is not an identifier.
+            if (token() === 121 /* AwaitKeyword */ && inAwaitContext()) {
+                return false;
+            }
+            return token() > 107 /* LastReservedWord */;
+        }
+        function parseExpected(kind, diagnosticMessage, shouldAdvance) {
+            if (shouldAdvance === void 0) { shouldAdvance = true; }
+            if (token() === kind) {
+                if (shouldAdvance) {
+                    nextToken();
+                }
+                return true;
+            }
+            // Report specific message if provided with one.  Otherwise, report generic fallback message.
+            if (diagnosticMessage) {
+                parseErrorAtCurrentToken(diagnosticMessage);
+            }
+            else {
+                parseErrorAtCurrentToken(ts.Diagnostics._0_expected, ts.tokenToString(kind));
+            }
             return false;
         }
-        // Perform binary search in one of the Unicode range maps
-        var lo = 0;
-        var hi = map.length;
-        var mid;
-        while (lo + 1 < hi) {
-            mid = lo + (hi - lo) / 2;
-            // mid has to be even to catch a range's beginning
-            mid -= mid % 2;
-            if (map[mid] <= code && code <= map[mid + 1]) {
+        function parseOptional(t) {
+            if (token() === t) {
+                nextToken();
                 return true;
             }
-            if (code < map[mid]) {
-                hi = mid;
+            return false;
+        }
+        function parseOptionalToken(t) {
+            if (token() === t) {
+                return parseTokenNode();
+            }
+            return undefined;
+        }
+        function parseExpectedToken(t, reportAtCurrentPosition, diagnosticMessage, arg0) {
+            return parseOptionalToken(t) ||
+                createMissingNode(t, reportAtCurrentPosition, diagnosticMessage, arg0);
+        }
+        function parseTokenNode() {
+            var node = createNode(token());
+            nextToken();
+            return finishNode(node);
+        }
+        function canParseSemicolon() {
+            // If there's a real semicolon, then we can always parse it out.
+            if (token() === 25 /* SemicolonToken */) {
+                return true;
+            }
+            // We can parse out an optional semicolon in ASI cases in the following cases.
+            return token() === 18 /* CloseBraceToken */ || token() === 1 /* EndOfFileToken */ || scanner.hasPrecedingLineBreak();
+        }
+        function parseSemicolon() {
+            if (canParseSemicolon()) {
+                if (token() === 25 /* SemicolonToken */) {
+                    // consume the semicolon if it was explicitly provided.
+                    nextToken();
+                }
+                return true;
+            }
+            else {
+                return parseExpected(25 /* SemicolonToken */);
+            }
+        }
+        // note: this function creates only node
+        function createNode(kind, pos) {
+            nodeCount++;
+            if (!(pos >= 0)) {
+                pos = scanner.getStartPos();
+            }
+            return ts.isNodeKind(kind) ? new NodeConstructor(kind, pos, pos) :
+                kind === 71 /* Identifier */ ? new IdentifierConstructor(kind, pos, pos) :
+                    new TokenConstructor(kind, pos, pos);
+        }
+        function createNodeArray(elements, pos) {
+            var array = (elements || []);
+            if (!(pos >= 0)) {
+                pos = getNodePos();
+            }
+            array.pos = pos;
+            array.end = pos;
+            return array;
+        }
+        function finishNode(node, end) {
+            node.end = end === undefined ? scanner.getStartPos() : end;
+            if (contextFlags) {
+                node.flags |= contextFlags;
+            }
+            // Keep track on the node if we encountered an error while parsing it.  If we did, then
+            // we cannot reuse the node incrementally.  Once we've marked this node, clear out the
+            // flag so that we don't mark any subsequent nodes.
+            if (parseErrorBeforeNextFinishedNode) {
+                parseErrorBeforeNextFinishedNode = false;
+                node.flags |= 32768 /* ThisNodeHasError */;
+            }
+            return node;
+        }
+        function createMissingNode(kind, reportAtCurrentPosition, diagnosticMessage, arg0) {
+            if (reportAtCurrentPosition) {
+                parseErrorAtPosition(scanner.getStartPos(), 0, diagnosticMessage, arg0);
             }
             else {
-                lo = mid + 2;
+                parseErrorAtCurrentToken(diagnosticMessage, arg0);
             }
+            var result = createNode(kind, scanner.getStartPos());
+            result.text = "";
+            return finishNode(result);
         }
-        return false;
-    }
-    /* @internal */ function isUnicodeIdentifierStart(code, languageVersion) {
-        return languageVersion >= 1 /* ES5 */ ?
-            lookupInUnicodeMap(code, unicodeES5IdentifierStart) :
-            lookupInUnicodeMap(code, unicodeES3IdentifierStart);
-    }
-    ts.isUnicodeIdentifierStart = isUnicodeIdentifierStart;
-    function isUnicodeIdentifierPart(code, languageVersion) {
-        return languageVersion >= 1 /* ES5 */ ?
-            lookupInUnicodeMap(code, unicodeES5IdentifierPart) :
-            lookupInUnicodeMap(code, unicodeES3IdentifierPart);
-    }
-    function makeReverseMap(source) {
-        var result = [];
-        for (var name_8 in source) {
-            result[source[name_8]] = name_8;
+        function internIdentifier(text) {
+            text = ts.escapeIdentifier(text);
+            var identifier = identifiers.get(text);
+            if (identifier === undefined) {
+                identifiers.set(text, identifier = text);
+            }
+            return identifier;
         }
-        return result;
-    }
-    var tokenStrings = makeReverseMap(textToToken);
-    function tokenToString(t) {
-        return tokenStrings[t];
-    }
-    ts.tokenToString = tokenToString;
-    /* @internal */
-    function stringToToken(s) {
-        return textToToken[s];
-    }
-    ts.stringToToken = stringToToken;
-    /* @internal */
-    function computeLineStarts(text) {
-        var result = new Array();
-        var pos = 0;
-        var lineStart = 0;
-        while (pos < text.length) {
-            var ch = text.charCodeAt(pos);
-            pos++;
-            switch (ch) {
-                case 13 /* carriageReturn */:
-                    if (text.charCodeAt(pos) === 10 /* lineFeed */) {
-                        pos++;
-                    }
-                case 10 /* lineFeed */:
-                    result.push(lineStart);
-                    lineStart = pos;
-                    break;
-                default:
-                    if (ch > 127 /* maxAsciiCharacter */ && isLineBreak(ch)) {
-                        result.push(lineStart);
-                        lineStart = pos;
-                    }
-                    break;
+        // An identifier that starts with two underscores has an extra underscore character prepended to it to avoid issues
+        // with magic property names like '__proto__'. The 'identifiers' object is used to share a single string instance for
+        // each identifier in order to reduce memory consumption.
+        function createIdentifier(isIdentifier, diagnosticMessage) {
+            identifierCount++;
+            if (isIdentifier) {
+                var node = createNode(71 /* Identifier */);
+                // Store original token kind if it is not just an Identifier so we can report appropriate error later in type checker
+                if (token() !== 71 /* Identifier */) {
+                    node.originalKeywordKind = token();
+                }
+                node.text = internIdentifier(scanner.getTokenValue());
+                nextToken();
+                return finishNode(node);
             }
+            return createMissingNode(71 /* Identifier */, /*reportAtCurrentPosition*/ false, diagnosticMessage || ts.Diagnostics.Identifier_expected);
         }
-        result.push(lineStart);
-        return result;
-    }
-    ts.computeLineStarts = computeLineStarts;
-    function getPositionOfLineAndCharacter(sourceFile, line, character) {
-        return computePositionOfLineAndCharacter(getLineStarts(sourceFile), line, character);
-    }
-    ts.getPositionOfLineAndCharacter = getPositionOfLineAndCharacter;
-    /* @internal */
-    function computePositionOfLineAndCharacter(lineStarts, line, character) {
-        ts.Debug.assert(line >= 0 && line < lineStarts.length);
-        return lineStarts[line] + character;
-    }
-    ts.computePositionOfLineAndCharacter = computePositionOfLineAndCharacter;
-    /* @internal */
-    function getLineStarts(sourceFile) {
-        return sourceFile.lineMap || (sourceFile.lineMap = computeLineStarts(sourceFile.text));
-    }
-    ts.getLineStarts = getLineStarts;
-    /* @internal */
-    /**
-     * We assume the first line starts at position 0 and 'position' is non-negative.
-     */
-    function computeLineAndCharacterOfPosition(lineStarts, position) {
-        var lineNumber = ts.binarySearch(lineStarts, position);
-        if (lineNumber < 0) {
-            // If the actual position was not found,
-            // the binary search returns the 2's-complement of the next line start
-            // e.g. if the line starts at [5, 10, 23, 80] and the position requested was 20
-            // then the search will return -2.
-            //
-            // We want the index of the previous line start, so we subtract 1.
-            // Review 2's-complement if this is confusing.
-            lineNumber = ~lineNumber - 1;
-            ts.Debug.assert(lineNumber !== -1, "position cannot precede the beginning of the file");
+        function parseIdentifier(diagnosticMessage) {
+            return createIdentifier(isIdentifier(), diagnosticMessage);
         }
-        return {
-            line: lineNumber,
-            character: position - lineStarts[lineNumber]
-        };
-    }
-    ts.computeLineAndCharacterOfPosition = computeLineAndCharacterOfPosition;
-    function getLineAndCharacterOfPosition(sourceFile, position) {
-        return computeLineAndCharacterOfPosition(getLineStarts(sourceFile), position);
-    }
-    ts.getLineAndCharacterOfPosition = getLineAndCharacterOfPosition;
-    var hasOwnProperty = Object.prototype.hasOwnProperty;
-    function isWhiteSpace(ch) {
-        return isWhiteSpaceSingleLine(ch) || isLineBreak(ch);
-    }
-    ts.isWhiteSpace = isWhiteSpace;
-    /** Does not include line breaks. For that, see isWhiteSpaceLike. */
-    function isWhiteSpaceSingleLine(ch) {
-        // Note: nextLine is in the Zs space, and should be considered to be a whitespace.
-        // It is explicitly not a line-break as it isn't in the exact set specified by EcmaScript.
-        return ch === 32 /* space */ ||
-            ch === 9 /* tab */ ||
-            ch === 11 /* verticalTab */ ||
-            ch === 12 /* formFeed */ ||
-            ch === 160 /* nonBreakingSpace */ ||
-            ch === 133 /* nextLine */ ||
-            ch === 5760 /* ogham */ ||
-            ch >= 8192 /* enQuad */ && ch <= 8203 /* zeroWidthSpace */ ||
-            ch === 8239 /* narrowNoBreakSpace */ ||
-            ch === 8287 /* mathematicalSpace */ ||
-            ch === 12288 /* ideographicSpace */ ||
-            ch === 65279 /* byteOrderMark */;
-    }
-    ts.isWhiteSpaceSingleLine = isWhiteSpaceSingleLine;
-    function isLineBreak(ch) {
-        // ES5 7.3:
-        // The ECMAScript line terminator characters are listed in Table 3.
-        //     Table 3: Line Terminator Characters
-        //     Code Unit Value     Name                    Formal Name
-        //     \u000A              Line Feed               <LF>
-        //     \u000D              Carriage Return         <CR>
-        //     \u2028              Line separator          <LS>
-        //     \u2029              Paragraph separator     <PS>
-        // Only the characters in Table 3 are treated as line terminators. Other new line or line
-        // breaking characters are treated as white space but not as line terminators.
-        return ch === 10 /* lineFeed */ ||
-            ch === 13 /* carriageReturn */ ||
-            ch === 8232 /* lineSeparator */ ||
-            ch === 8233 /* paragraphSeparator */;
-    }
-    ts.isLineBreak = isLineBreak;
-    function isDigit(ch) {
-        return ch >= 48 /* _0 */ && ch <= 57 /* _9 */;
-    }
-    /* @internal */
-    function isOctalDigit(ch) {
-        return ch >= 48 /* _0 */ && ch <= 55 /* _7 */;
-    }
-    ts.isOctalDigit = isOctalDigit;
-    function couldStartTrivia(text, pos) {
-        // Keep in sync with skipTrivia
-        var ch = text.charCodeAt(pos);
-        switch (ch) {
-            case 13 /* carriageReturn */:
-            case 10 /* lineFeed */:
-            case 9 /* tab */:
-            case 11 /* verticalTab */:
-            case 12 /* formFeed */:
-            case 32 /* space */:
-            case 47 /* slash */:
-            // starts of normal trivia
-            case 60 /* lessThan */:
-            case 61 /* equals */:
-            case 62 /* greaterThan */:
-                // Starts of conflict marker trivia
-                return true;
-            case 35 /* hash */:
-                // Only if its the beginning can we have #! trivia
-                return pos === 0;
-            default:
-                return ch > 127 /* maxAsciiCharacter */;
+        function parseIdentifierName() {
+            return createIdentifier(ts.tokenIsIdentifierOrKeyword(token()));
         }
-    }
-    ts.couldStartTrivia = couldStartTrivia;
-    /* @internal */
-    function skipTrivia(text, pos, stopAfterLineBreak, stopAtComments) {
-        if (stopAtComments === void 0) { stopAtComments = false; }
-        if (ts.positionIsSynthesized(pos)) {
-            return pos;
+        function isLiteralPropertyName() {
+            return ts.tokenIsIdentifierOrKeyword(token()) ||
+                token() === 9 /* StringLiteral */ ||
+                token() === 8 /* NumericLiteral */;
         }
-        // Keep in sync with couldStartTrivia
-        while (true) {
-            var ch = text.charCodeAt(pos);
-            switch (ch) {
-                case 13 /* carriageReturn */:
-                    if (text.charCodeAt(pos + 1) === 10 /* lineFeed */) {
-                        pos++;
-                    }
-                case 10 /* lineFeed */:
-                    pos++;
-                    if (stopAfterLineBreak) {
-                        return pos;
-                    }
-                    continue;
-                case 9 /* tab */:
-                case 11 /* verticalTab */:
-                case 12 /* formFeed */:
-                case 32 /* space */:
-                    pos++;
-                    continue;
-                case 47 /* slash */:
-                    if (stopAtComments) {
-                        break;
-                    }
-                    if (text.charCodeAt(pos + 1) === 47 /* slash */) {
-                        pos += 2;
-                        while (pos < text.length) {
-                            if (isLineBreak(text.charCodeAt(pos))) {
-                                break;
-                            }
-                            pos++;
-                        }
-                        continue;
-                    }
-                    if (text.charCodeAt(pos + 1) === 42 /* asterisk */) {
-                        pos += 2;
-                        while (pos < text.length) {
-                            if (text.charCodeAt(pos) === 42 /* asterisk */ && text.charCodeAt(pos + 1) === 47 /* slash */) {
-                                pos += 2;
-                                break;
-                            }
-                            pos++;
-                        }
-                        continue;
-                    }
-                    break;
-                case 60 /* lessThan */:
-                case 61 /* equals */:
-                case 62 /* greaterThan */:
-                    if (isConflictMarkerTrivia(text, pos)) {
-                        pos = scanConflictMarkerTrivia(text, pos);
-                        continue;
-                    }
-                    break;
-                case 35 /* hash */:
-                    if (pos === 0 && isShebangTrivia(text, pos)) {
-                        pos = scanShebangTrivia(text, pos);
-                        continue;
-                    }
-                    break;
-                default:
-                    if (ch > 127 /* maxAsciiCharacter */ && (isWhiteSpace(ch))) {
-                        pos++;
-                        continue;
-                    }
-                    break;
+        function parsePropertyNameWorker(allowComputedPropertyNames) {
+            if (token() === 9 /* StringLiteral */ || token() === 8 /* NumericLiteral */) {
+                return parseLiteralNode(/*internName*/ true);
             }
-            return pos;
-        }
-    }
-    ts.skipTrivia = skipTrivia;
-    // All conflict markers consist of the same character repeated seven times.  If it is
-    // a <<<<<<< or >>>>>>> marker then it is also followed by a space.
-    var mergeConflictMarkerLength = "<<<<<<<".length;
-    function isConflictMarkerTrivia(text, pos) {
-        ts.Debug.assert(pos >= 0);
-        // Conflict markers must be at the start of a line.
-        if (pos === 0 || isLineBreak(text.charCodeAt(pos - 1))) {
-            var ch = text.charCodeAt(pos);
-            if ((pos + mergeConflictMarkerLength) < text.length) {
-                for (var i = 0, n = mergeConflictMarkerLength; i < n; i++) {
-                    if (text.charCodeAt(pos + i) !== ch) {
-                        return false;
-                    }
-                }
-                return ch === 61 /* equals */ ||
-                    text.charCodeAt(pos + mergeConflictMarkerLength) === 32 /* space */;
+            if (allowComputedPropertyNames && token() === 21 /* OpenBracketToken */) {
+                return parseComputedPropertyName();
             }
+            return parseIdentifierName();
         }
-        return false;
-    }
-    function scanConflictMarkerTrivia(text, pos, error) {
-        if (error) {
-            error(ts.Diagnostics.Merge_conflict_marker_encountered, mergeConflictMarkerLength);
+        function parsePropertyName() {
+            return parsePropertyNameWorker(/*allowComputedPropertyNames*/ true);
         }
-        var ch = text.charCodeAt(pos);
-        var len = text.length;
-        if (ch === 60 /* lessThan */ || ch === 62 /* greaterThan */) {
-            while (pos < len && !isLineBreak(text.charCodeAt(pos))) {
-                pos++;
+        function parseSimplePropertyName() {
+            return parsePropertyNameWorker(/*allowComputedPropertyNames*/ false);
+        }
+        function isSimplePropertyName() {
+            return token() === 9 /* StringLiteral */ || token() === 8 /* NumericLiteral */ || ts.tokenIsIdentifierOrKeyword(token());
+        }
+        function parseComputedPropertyName() {
+            // PropertyName [Yield]:
+            //      LiteralPropertyName
+            //      ComputedPropertyName[?Yield]
+            var node = createNode(144 /* ComputedPropertyName */);
+            parseExpected(21 /* OpenBracketToken */);
+            // We parse any expression (including a comma expression). But the grammar
+            // says that only an assignment expression is allowed, so the grammar checker
+            // will error if it sees a comma expression.
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(22 /* CloseBracketToken */);
+            return finishNode(node);
+        }
+        function parseContextualModifier(t) {
+            return token() === t && tryParse(nextTokenCanFollowModifier);
+        }
+        function nextTokenIsOnSameLineAndCanFollowModifier() {
+            nextToken();
+            if (scanner.hasPrecedingLineBreak()) {
+                return false;
             }
+            return canFollowModifier();
         }
-        else {
-            ts.Debug.assert(ch === 61 /* equals */);
-            // Consume everything from the start of the mid-conflict marker to the start of the next
-            // end-conflict marker.
-            while (pos < len) {
-                var ch_1 = text.charCodeAt(pos);
-                if (ch_1 === 62 /* greaterThan */ && isConflictMarkerTrivia(text, pos)) {
-                    break;
+        function nextTokenCanFollowModifier() {
+            if (token() === 76 /* ConstKeyword */) {
+                // 'const' is only a modifier if followed by 'enum'.
+                return nextToken() === 83 /* EnumKeyword */;
+            }
+            if (token() === 84 /* ExportKeyword */) {
+                nextToken();
+                if (token() === 79 /* DefaultKeyword */) {
+                    return lookAhead(nextTokenCanFollowDefaultKeyword);
                 }
-                pos++;
+                return token() !== 39 /* AsteriskToken */ && token() !== 118 /* AsKeyword */ && token() !== 17 /* OpenBraceToken */ && canFollowModifier();
+            }
+            if (token() === 79 /* DefaultKeyword */) {
+                return nextTokenCanFollowDefaultKeyword();
+            }
+            if (token() === 115 /* StaticKeyword */) {
+                nextToken();
+                return canFollowModifier();
             }
+            return nextTokenIsOnSameLineAndCanFollowModifier();
         }
-        return pos;
-    }
-    var shebangTriviaRegex = /^#!.*/;
-    function isShebangTrivia(text, pos) {
-        // Shebangs check must only be done at the start of the file
-        ts.Debug.assert(pos === 0);
-        return shebangTriviaRegex.test(text);
-    }
-    function scanShebangTrivia(text, pos) {
-        var shebang = shebangTriviaRegex.exec(text)[0];
-        pos = pos + shebang.length;
-        return pos;
-    }
-    /**
-     * Invokes a callback for each comment range following the provided position.
-     *
-     * Single-line comment ranges include the leading double-slash characters but not the ending
-     * line break. Multi-line comment ranges include the leading slash-asterisk and trailing
-     * asterisk-slash characters.
-     *
-     * @param reduce If true, accumulates the result of calling the callback in a fashion similar
-     *      to reduceLeft. If false, iteration stops when the callback returns a truthy value.
-     * @param text The source text to scan.
-     * @param pos The position at which to start scanning.
-     * @param trailing If false, whitespace is skipped until the first line break and comments
-     *      between that location and the next token are returned. If true, comments occurring
-     *      between the given position and the next line break are returned.
-     * @param cb The callback to execute as each comment range is encountered.
-     * @param state A state value to pass to each iteration of the callback.
-     * @param initial An initial value to pass when accumulating results (when "reduce" is true).
-     * @returns If "reduce" is true, the accumulated value. If "reduce" is false, the first truthy
-     *      return value of the callback.
-     */
-    function iterateCommentRanges(reduce, text, pos, trailing, cb, state, initial) {
-        var pendingPos;
-        var pendingEnd;
-        var pendingKind;
-        var pendingHasTrailingNewLine;
-        var hasPendingCommentRange = false;
-        var collecting = trailing || pos === 0;
-        var accumulator = initial;
-        scan: while (pos >= 0 && pos < text.length) {
-            var ch = text.charCodeAt(pos);
-            switch (ch) {
-                case 13 /* carriageReturn */:
-                    if (text.charCodeAt(pos + 1) === 10 /* lineFeed */) {
-                        pos++;
-                    }
-                case 10 /* lineFeed */:
-                    pos++;
-                    if (trailing) {
-                        break scan;
-                    }
-                    collecting = true;
-                    if (hasPendingCommentRange) {
-                        pendingHasTrailingNewLine = true;
+        function parseAnyContextualModifier() {
+            return ts.isModifierKind(token()) && tryParse(nextTokenCanFollowModifier);
+        }
+        function canFollowModifier() {
+            return token() === 21 /* OpenBracketToken */
+                || token() === 17 /* OpenBraceToken */
+                || token() === 39 /* AsteriskToken */
+                || token() === 24 /* DotDotDotToken */
+                || isLiteralPropertyName();
+        }
+        function nextTokenCanFollowDefaultKeyword() {
+            nextToken();
+            return token() === 75 /* ClassKeyword */ || token() === 89 /* FunctionKeyword */ ||
+                token() === 109 /* InterfaceKeyword */ ||
+                (token() === 117 /* AbstractKeyword */ && lookAhead(nextTokenIsClassKeywordOnSameLine)) ||
+                (token() === 120 /* AsyncKeyword */ && lookAhead(nextTokenIsFunctionKeywordOnSameLine));
+        }
+        // True if positioned at the start of a list element
+        function isListElement(parsingContext, inErrorRecovery) {
+            var node = currentNode(parsingContext);
+            if (node) {
+                return true;
+            }
+            switch (parsingContext) {
+                case 0 /* SourceElements */:
+                case 1 /* BlockStatements */:
+                case 3 /* SwitchClauseStatements */:
+                    // If we're in error recovery, then we don't want to treat ';' as an empty statement.
+                    // The problem is that ';' can show up in far too many contexts, and if we see one
+                    // and assume it's a statement, then we may bail out inappropriately from whatever
+                    // we're parsing.  For example, if we have a semicolon in the middle of a class, then
+                    // we really don't want to assume the class is over and we're on a statement in the
+                    // outer module.  We just want to consume and move on.
+                    return !(token() === 25 /* SemicolonToken */ && inErrorRecovery) && isStartOfStatement();
+                case 2 /* SwitchClauses */:
+                    return token() === 73 /* CaseKeyword */ || token() === 79 /* DefaultKeyword */;
+                case 4 /* TypeMembers */:
+                    return lookAhead(isTypeMemberStart);
+                case 5 /* ClassMembers */:
+                    // We allow semicolons as class elements (as specified by ES6) as long as we're
+                    // not in error recovery.  If we're in error recovery, we don't want an errant
+                    // semicolon to be treated as a class member (since they're almost always used
+                    // for statements.
+                    return lookAhead(isClassMemberStart) || (token() === 25 /* SemicolonToken */ && !inErrorRecovery);
+                case 6 /* EnumMembers */:
+                    // Include open bracket computed properties. This technically also lets in indexers,
+                    // which would be a candidate for improved error reporting.
+                    return token() === 21 /* OpenBracketToken */ || isLiteralPropertyName();
+                case 12 /* ObjectLiteralMembers */:
+                    return token() === 21 /* OpenBracketToken */ || token() === 39 /* AsteriskToken */ || token() === 24 /* DotDotDotToken */ || isLiteralPropertyName();
+                case 17 /* RestProperties */:
+                    return isLiteralPropertyName();
+                case 9 /* ObjectBindingElements */:
+                    return token() === 21 /* OpenBracketToken */ || token() === 24 /* DotDotDotToken */ || isLiteralPropertyName();
+                case 7 /* HeritageClauseElement */:
+                    // If we see `{ ... }` then only consume it as an expression if it is followed by `,` or `{`
+                    // That way we won't consume the body of a class in its heritage clause.
+                    if (token() === 17 /* OpenBraceToken */) {
+                        return lookAhead(isValidHeritageClauseObjectLiteral);
                     }
-                    continue;
-                case 9 /* tab */:
-                case 11 /* verticalTab */:
-                case 12 /* formFeed */:
-                case 32 /* space */:
-                    pos++;
-                    continue;
-                case 47 /* slash */:
-                    var nextChar = text.charCodeAt(pos + 1);
-                    var hasTrailingNewLine = false;
-                    if (nextChar === 47 /* slash */ || nextChar === 42 /* asterisk */) {
-                        var kind = nextChar === 47 /* slash */ ? 2 /* SingleLineCommentTrivia */ : 3 /* MultiLineCommentTrivia */;
-                        var startPos = pos;
-                        pos += 2;
-                        if (nextChar === 47 /* slash */) {
-                            while (pos < text.length) {
-                                if (isLineBreak(text.charCodeAt(pos))) {
-                                    hasTrailingNewLine = true;
-                                    break;
-                                }
-                                pos++;
-                            }
-                        }
-                        else {
-                            while (pos < text.length) {
-                                if (text.charCodeAt(pos) === 42 /* asterisk */ && text.charCodeAt(pos + 1) === 47 /* slash */) {
-                                    pos += 2;
-                                    break;
-                                }
-                                pos++;
-                            }
-                        }
-                        if (collecting) {
-                            if (hasPendingCommentRange) {
-                                accumulator = cb(pendingPos, pendingEnd, pendingKind, pendingHasTrailingNewLine, state, accumulator);
-                                if (!reduce && accumulator) {
-                                    // If we are not reducing and we have a truthy result, return it.
-                                    return accumulator;
-                                }
-                                hasPendingCommentRange = false;
-                            }
-                            pendingPos = startPos;
-                            pendingEnd = pos;
-                            pendingKind = kind;
-                            pendingHasTrailingNewLine = hasTrailingNewLine;
-                            hasPendingCommentRange = true;
-                        }
-                        continue;
+                    if (!inErrorRecovery) {
+                        return isStartOfLeftHandSideExpression() && !isHeritageClauseExtendsOrImplementsKeyword();
                     }
-                    break scan;
-                default:
-                    if (ch > 127 /* maxAsciiCharacter */ && (isWhiteSpace(ch))) {
-                        if (hasPendingCommentRange && isLineBreak(ch)) {
-                            pendingHasTrailingNewLine = true;
-                        }
-                        pos++;
-                        continue;
+                    else {
+                        // If we're in error recovery we tighten up what we're willing to match.
+                        // That way we don't treat something like "this" as a valid heritage clause
+                        // element during recovery.
+                        return isIdentifier() && !isHeritageClauseExtendsOrImplementsKeyword();
                     }
-                    break scan;
+                case 8 /* VariableDeclarations */:
+                    return isIdentifierOrPattern();
+                case 10 /* ArrayBindingElements */:
+                    return token() === 26 /* CommaToken */ || token() === 24 /* DotDotDotToken */ || isIdentifierOrPattern();
+                case 18 /* TypeParameters */:
+                    return isIdentifier();
+                case 11 /* ArgumentExpressions */:
+                case 15 /* ArrayLiteralMembers */:
+                    return token() === 26 /* CommaToken */ || token() === 24 /* DotDotDotToken */ || isStartOfExpression();
+                case 16 /* Parameters */:
+                    return isStartOfParameter();
+                case 19 /* TypeArguments */:
+                case 20 /* TupleElementTypes */:
+                    return token() === 26 /* CommaToken */ || isStartOfType();
+                case 21 /* HeritageClauses */:
+                    return isHeritageClause();
+                case 22 /* ImportOrExportSpecifiers */:
+                    return ts.tokenIsIdentifierOrKeyword(token());
+                case 13 /* JsxAttributes */:
+                    return ts.tokenIsIdentifierOrKeyword(token()) || token() === 17 /* OpenBraceToken */;
+                case 14 /* JsxChildren */:
+                    return true;
+                case 23 /* JSDocFunctionParameters */:
+                case 24 /* JSDocTypeArguments */:
+                case 26 /* JSDocTupleTypes */:
+                    return JSDocParser.isJSDocType();
+                case 25 /* JSDocRecordMembers */:
+                    return isSimplePropertyName();
             }
+            ts.Debug.fail("Non-exhaustive case in 'isListElement'.");
         }
-        if (hasPendingCommentRange) {
-            accumulator = cb(pendingPos, pendingEnd, pendingKind, pendingHasTrailingNewLine, state, accumulator);
+        function isValidHeritageClauseObjectLiteral() {
+            ts.Debug.assert(token() === 17 /* OpenBraceToken */);
+            if (nextToken() === 18 /* CloseBraceToken */) {
+                // if we see  "extends {}" then only treat the {} as what we're extending (and not
+                // the class body) if we have:
+                //
+                //      extends {} {
+                //      extends {},
+                //      extends {} extends
+                //      extends {} implements
+                var next = nextToken();
+                return next === 26 /* CommaToken */ || next === 17 /* OpenBraceToken */ || next === 85 /* ExtendsKeyword */ || next === 108 /* ImplementsKeyword */;
+            }
+            return true;
         }
-        return accumulator;
-    }
-    function forEachLeadingCommentRange(text, pos, cb, state) {
-        return iterateCommentRanges(/*reduce*/ false, text, pos, /*trailing*/ false, cb, state);
-    }
-    ts.forEachLeadingCommentRange = forEachLeadingCommentRange;
-    function forEachTrailingCommentRange(text, pos, cb, state) {
-        return iterateCommentRanges(/*reduce*/ false, text, pos, /*trailing*/ true, cb, state);
-    }
-    ts.forEachTrailingCommentRange = forEachTrailingCommentRange;
-    function reduceEachLeadingCommentRange(text, pos, cb, state, initial) {
-        return iterateCommentRanges(/*reduce*/ true, text, pos, /*trailing*/ false, cb, state, initial);
-    }
-    ts.reduceEachLeadingCommentRange = reduceEachLeadingCommentRange;
-    function reduceEachTrailingCommentRange(text, pos, cb, state, initial) {
-        return iterateCommentRanges(/*reduce*/ true, text, pos, /*trailing*/ true, cb, state, initial);
-    }
-    ts.reduceEachTrailingCommentRange = reduceEachTrailingCommentRange;
-    function appendCommentRange(pos, end, kind, hasTrailingNewLine, state, comments) {
-        if (!comments) {
-            comments = [];
+        function nextTokenIsIdentifier() {
+            nextToken();
+            return isIdentifier();
         }
-        comments.push({ pos: pos, end: end, hasTrailingNewLine: hasTrailingNewLine, kind: kind });
-        return comments;
-    }
-    function getLeadingCommentRanges(text, pos) {
-        return reduceEachLeadingCommentRange(text, pos, appendCommentRange, undefined, undefined);
-    }
-    ts.getLeadingCommentRanges = getLeadingCommentRanges;
-    function getTrailingCommentRanges(text, pos) {
-        return reduceEachTrailingCommentRange(text, pos, appendCommentRange, undefined, undefined);
-    }
-    ts.getTrailingCommentRanges = getTrailingCommentRanges;
-    /** Optionally, get the shebang */
-    function getShebang(text) {
-        return shebangTriviaRegex.test(text)
-            ? shebangTriviaRegex.exec(text)[0]
-            : undefined;
-    }
-    ts.getShebang = getShebang;
-    function isIdentifierStart(ch, languageVersion) {
-        return ch >= 65 /* A */ && ch <= 90 /* Z */ || ch >= 97 /* a */ && ch <= 122 /* z */ ||
-            ch === 36 /* $ */ || ch === 95 /* _ */ ||
-            ch > 127 /* maxAsciiCharacter */ && isUnicodeIdentifierStart(ch, languageVersion);
-    }
-    ts.isIdentifierStart = isIdentifierStart;
-    function isIdentifierPart(ch, languageVersion) {
-        return ch >= 65 /* A */ && ch <= 90 /* Z */ || ch >= 97 /* a */ && ch <= 122 /* z */ ||
-            ch >= 48 /* _0 */ && ch <= 57 /* _9 */ || ch === 36 /* $ */ || ch === 95 /* _ */ ||
-            ch > 127 /* maxAsciiCharacter */ && isUnicodeIdentifierPart(ch, languageVersion);
-    }
-    ts.isIdentifierPart = isIdentifierPart;
-    /* @internal */
-    function isIdentifierText(name, languageVersion) {
-        if (!isIdentifierStart(name.charCodeAt(0), languageVersion)) {
-            return false;
+        function nextTokenIsIdentifierOrKeyword() {
+            nextToken();
+            return ts.tokenIsIdentifierOrKeyword(token());
         }
-        for (var i = 1, n = name.length; i < n; i++) {
-            if (!isIdentifierPart(name.charCodeAt(i), languageVersion)) {
-                return false;
+        function isHeritageClauseExtendsOrImplementsKeyword() {
+            if (token() === 108 /* ImplementsKeyword */ ||
+                token() === 85 /* ExtendsKeyword */) {
+                return lookAhead(nextTokenIsStartOfExpression);
             }
+            return false;
         }
-        return true;
-    }
-    ts.isIdentifierText = isIdentifierText;
-    // Creates a scanner over a (possibly unspecified) range of a piece of text.
-    function createScanner(languageVersion, skipTrivia, languageVariant, text, onError, start, length) {
-        if (languageVariant === void 0) { languageVariant = 0 /* Standard */; }
-        // Current position (end position of text of current token)
-        var pos;
-        // end of text
-        var end;
-        // Start position of whitespace before current token
-        var startPos;
-        // Start position of text of current token
-        var tokenPos;
-        var token;
-        var tokenValue;
-        var precedingLineBreak;
-        var hasExtendedUnicodeEscape;
-        var tokenIsUnterminated;
-        setText(text, start, length);
-        return {
-            getStartPos: function () { return startPos; },
-            getTextPos: function () { return pos; },
-            getToken: function () { return token; },
-            getTokenPos: function () { return tokenPos; },
-            getTokenText: function () { return text.substring(tokenPos, pos); },
-            getTokenValue: function () { return tokenValue; },
-            hasExtendedUnicodeEscape: function () { return hasExtendedUnicodeEscape; },
-            hasPrecedingLineBreak: function () { return precedingLineBreak; },
-            isIdentifier: function () { return token === 69 /* Identifier */ || token > 105 /* LastReservedWord */; },
-            isReservedWord: function () { return token >= 70 /* FirstReservedWord */ && token <= 105 /* LastReservedWord */; },
-            isUnterminated: function () { return tokenIsUnterminated; },
-            reScanGreaterToken: reScanGreaterToken,
-            reScanSlashToken: reScanSlashToken,
-            reScanTemplateToken: reScanTemplateToken,
-            scanJsxIdentifier: scanJsxIdentifier,
-            scanJsxAttributeValue: scanJsxAttributeValue,
-            reScanJsxToken: reScanJsxToken,
-            scanJsxToken: scanJsxToken,
-            scanJSDocToken: scanJSDocToken,
-            scan: scan,
-            getText: getText,
-            setText: setText,
-            setScriptTarget: setScriptTarget,
-            setLanguageVariant: setLanguageVariant,
-            setOnError: setOnError,
-            setTextPos: setTextPos,
-            tryScan: tryScan,
-            lookAhead: lookAhead,
-            scanRange: scanRange,
-        };
-        function error(message, length) {
-            if (onError) {
-                onError(message, length || 0);
-            }
+        function nextTokenIsStartOfExpression() {
+            nextToken();
+            return isStartOfExpression();
         }
-        function scanNumber() {
-            var start = pos;
-            while (isDigit(text.charCodeAt(pos)))
-                pos++;
-            if (text.charCodeAt(pos) === 46 /* dot */) {
-                pos++;
-                while (isDigit(text.charCodeAt(pos)))
-                    pos++;
+        // True if positioned at a list terminator
+        function isListTerminator(kind) {
+            if (token() === 1 /* EndOfFileToken */) {
+                // Being at the end of the file ends all lists.
+                return true;
             }
-            var end = pos;
-            if (text.charCodeAt(pos) === 69 /* E */ || text.charCodeAt(pos) === 101 /* e */) {
-                pos++;
-                if (text.charCodeAt(pos) === 43 /* plus */ || text.charCodeAt(pos) === 45 /* minus */)
-                    pos++;
-                if (isDigit(text.charCodeAt(pos))) {
-                    pos++;
-                    while (isDigit(text.charCodeAt(pos)))
-                        pos++;
-                    end = pos;
-                }
-                else {
-                    error(ts.Diagnostics.Digit_expected);
-                }
+            switch (kind) {
+                case 1 /* BlockStatements */:
+                case 2 /* SwitchClauses */:
+                case 4 /* TypeMembers */:
+                case 5 /* ClassMembers */:
+                case 6 /* EnumMembers */:
+                case 12 /* ObjectLiteralMembers */:
+                case 9 /* ObjectBindingElements */:
+                case 22 /* ImportOrExportSpecifiers */:
+                    return token() === 18 /* CloseBraceToken */;
+                case 3 /* SwitchClauseStatements */:
+                    return token() === 18 /* CloseBraceToken */ || token() === 73 /* CaseKeyword */ || token() === 79 /* DefaultKeyword */;
+                case 7 /* HeritageClauseElement */:
+                    return token() === 17 /* OpenBraceToken */ || token() === 85 /* ExtendsKeyword */ || token() === 108 /* ImplementsKeyword */;
+                case 8 /* VariableDeclarations */:
+                    return isVariableDeclaratorListTerminator();
+                case 18 /* TypeParameters */:
+                    // Tokens other than '>' are here for better error recovery
+                    return token() === 29 /* GreaterThanToken */ || token() === 19 /* OpenParenToken */ || token() === 17 /* OpenBraceToken */ || token() === 85 /* ExtendsKeyword */ || token() === 108 /* ImplementsKeyword */;
+                case 11 /* ArgumentExpressions */:
+                    // Tokens other than ')' are here for better error recovery
+                    return token() === 20 /* CloseParenToken */ || token() === 25 /* SemicolonToken */;
+                case 15 /* ArrayLiteralMembers */:
+                case 20 /* TupleElementTypes */:
+                case 10 /* ArrayBindingElements */:
+                    return token() === 22 /* CloseBracketToken */;
+                case 16 /* Parameters */:
+                case 17 /* RestProperties */:
+                    // Tokens other than ')' and ']' (the latter for index signatures) are here for better error recovery
+                    return token() === 20 /* CloseParenToken */ || token() === 22 /* CloseBracketToken */ /*|| token === SyntaxKind.OpenBraceToken*/;
+                case 19 /* TypeArguments */:
+                    // All other tokens should cause the type-argument to terminate except comma token
+                    return token() !== 26 /* CommaToken */;
+                case 21 /* HeritageClauses */:
+                    return token() === 17 /* OpenBraceToken */ || token() === 18 /* CloseBraceToken */;
+                case 13 /* JsxAttributes */:
+                    return token() === 29 /* GreaterThanToken */ || token() === 41 /* SlashToken */;
+                case 14 /* JsxChildren */:
+                    return token() === 27 /* LessThanToken */ && lookAhead(nextTokenIsSlash);
+                case 23 /* JSDocFunctionParameters */:
+                    return token() === 20 /* CloseParenToken */ || token() === 56 /* ColonToken */ || token() === 18 /* CloseBraceToken */;
+                case 24 /* JSDocTypeArguments */:
+                    return token() === 29 /* GreaterThanToken */ || token() === 18 /* CloseBraceToken */;
+                case 26 /* JSDocTupleTypes */:
+                    return token() === 22 /* CloseBracketToken */ || token() === 18 /* CloseBraceToken */;
+                case 25 /* JSDocRecordMembers */:
+                    return token() === 18 /* CloseBraceToken */;
             }
-            return "" + +(text.substring(start, end));
         }
-        function scanOctalDigits() {
-            var start = pos;
-            while (isOctalDigit(text.charCodeAt(pos))) {
-                pos++;
+        function isVariableDeclaratorListTerminator() {
+            // If we can consume a semicolon (either explicitly, or with ASI), then consider us done
+            // with parsing the list of  variable declarators.
+            if (canParseSemicolon()) {
+                return true;
             }
-            return +(text.substring(start, pos));
-        }
-        /**
-         * Scans the given number of hexadecimal digits in the text,
-         * returning -1 if the given number is unavailable.
-         */
-        function scanExactNumberOfHexDigits(count) {
-            return scanHexDigits(/*minCount*/ count, /*scanAsManyAsPossible*/ false);
-        }
-        /**
-         * Scans as many hexadecimal digits as are available in the text,
-         * returning -1 if the given number of digits was unavailable.
-         */
-        function scanMinimumNumberOfHexDigits(count) {
-            return scanHexDigits(/*minCount*/ count, /*scanAsManyAsPossible*/ true);
-        }
-        function scanHexDigits(minCount, scanAsManyAsPossible) {
-            var digits = 0;
-            var value = 0;
-            while (digits < minCount || scanAsManyAsPossible) {
-                var ch = text.charCodeAt(pos);
-                if (ch >= 48 /* _0 */ && ch <= 57 /* _9 */) {
-                    value = value * 16 + ch - 48 /* _0 */;
-                }
-                else if (ch >= 65 /* A */ && ch <= 70 /* F */) {
-                    value = value * 16 + ch - 65 /* A */ + 10;
-                }
-                else if (ch >= 97 /* a */ && ch <= 102 /* f */) {
-                    value = value * 16 + ch - 97 /* a */ + 10;
-                }
-                else {
-                    break;
-                }
-                pos++;
-                digits++;
+            // in the case where we're parsing the variable declarator of a 'for-in' statement, we
+            // are done if we see an 'in' keyword in front of us. Same with for-of
+            if (isInOrOfKeyword(token())) {
+                return true;
             }
-            if (digits < minCount) {
-                value = -1;
+            // ERROR RECOVERY TWEAK:
+            // For better error recovery, if we see an '=>' then we just stop immediately.  We've got an
+            // arrow function here and it's going to be very unlikely that we'll resynchronize and get
+            // another variable declaration.
+            if (token() === 36 /* EqualsGreaterThanToken */) {
+                return true;
             }
-            return value;
+            // Keep trying to parse out variable declarators.
+            return false;
         }
-        function scanString(allowEscapes) {
-            if (allowEscapes === void 0) { allowEscapes = true; }
-            var quote = text.charCodeAt(pos);
-            pos++;
-            var result = "";
-            var start = pos;
-            while (true) {
-                if (pos >= end) {
-                    result += text.substring(start, pos);
-                    tokenIsUnterminated = true;
-                    error(ts.Diagnostics.Unterminated_string_literal);
-                    break;
-                }
-                var ch = text.charCodeAt(pos);
-                if (ch === quote) {
-                    result += text.substring(start, pos);
-                    pos++;
-                    break;
-                }
-                if (ch === 92 /* backslash */ && allowEscapes) {
-                    result += text.substring(start, pos);
-                    result += scanEscapeSequence();
-                    start = pos;
-                    continue;
-                }
-                if (isLineBreak(ch)) {
-                    result += text.substring(start, pos);
-                    tokenIsUnterminated = true;
-                    error(ts.Diagnostics.Unterminated_string_literal);
-                    break;
+        // True if positioned at element or terminator of the current list or any enclosing list
+        function isInSomeParsingContext() {
+            for (var kind = 0; kind < 27 /* Count */; kind++) {
+                if (parsingContext & (1 << kind)) {
+                    if (isListElement(kind, /*inErrorRecovery*/ true) || isListTerminator(kind)) {
+                        return true;
+                    }
                 }
-                pos++;
             }
-            return result;
+            return false;
         }
-        /**
-         * Sets the current 'tokenValue' and returns a NoSubstitutionTemplateLiteral or
-         * a literal component of a TemplateExpression.
-         */
-        function scanTemplateAndSetTokenValue() {
-            var startedWithBacktick = text.charCodeAt(pos) === 96 /* backtick */;
-            pos++;
-            var start = pos;
-            var contents = "";
-            var resultingToken;
-            while (true) {
-                if (pos >= end) {
-                    contents += text.substring(start, pos);
-                    tokenIsUnterminated = true;
-                    error(ts.Diagnostics.Unterminated_template_literal);
-                    resultingToken = startedWithBacktick ? 11 /* NoSubstitutionTemplateLiteral */ : 14 /* TemplateTail */;
-                    break;
-                }
-                var currChar = text.charCodeAt(pos);
-                // '`'
-                if (currChar === 96 /* backtick */) {
-                    contents += text.substring(start, pos);
-                    pos++;
-                    resultingToken = startedWithBacktick ? 11 /* NoSubstitutionTemplateLiteral */ : 14 /* TemplateTail */;
-                    break;
-                }
-                // '${'
-                if (currChar === 36 /* $ */ && pos + 1 < end && text.charCodeAt(pos + 1) === 123 /* openBrace */) {
-                    contents += text.substring(start, pos);
-                    pos += 2;
-                    resultingToken = startedWithBacktick ? 12 /* TemplateHead */ : 13 /* TemplateMiddle */;
-                    break;
-                }
-                // Escape character
-                if (currChar === 92 /* backslash */) {
-                    contents += text.substring(start, pos);
-                    contents += scanEscapeSequence();
-                    start = pos;
+        // Parses a list of elements
+        function parseList(kind, parseElement) {
+            var saveParsingContext = parsingContext;
+            parsingContext |= 1 << kind;
+            var result = createNodeArray();
+            while (!isListTerminator(kind)) {
+                if (isListElement(kind, /*inErrorRecovery*/ false)) {
+                    var element = parseListElement(kind, parseElement);
+                    result.push(element);
                     continue;
                 }
-                // Speculated ECMAScript 6 Spec 11.8.6.1:
-                // <CR><LF> and <CR> LineTerminatorSequences are normalized to <LF> for Template Values
-                if (currChar === 13 /* carriageReturn */) {
-                    contents += text.substring(start, pos);
-                    pos++;
-                    if (pos < end && text.charCodeAt(pos) === 10 /* lineFeed */) {
-                        pos++;
-                    }
-                    contents += "\n";
-                    start = pos;
-                    continue;
+                if (abortParsingListOrMoveToNextToken(kind)) {
+                    break;
                 }
-                pos++;
             }
-            ts.Debug.assert(resultingToken !== undefined);
-            tokenValue = contents;
-            return resultingToken;
+            result.end = getNodeEnd();
+            parsingContext = saveParsingContext;
+            return result;
         }
-        function scanEscapeSequence() {
-            pos++;
-            if (pos >= end) {
-                error(ts.Diagnostics.Unexpected_end_of_text);
-                return "";
-            }
-            var ch = text.charCodeAt(pos);
-            pos++;
-            switch (ch) {
-                case 48 /* _0 */:
-                    return "\0";
-                case 98 /* b */:
-                    return "\b";
-                case 116 /* t */:
-                    return "\t";
-                case 110 /* n */:
-                    return "\n";
-                case 118 /* v */:
-                    return "\v";
-                case 102 /* f */:
-                    return "\f";
-                case 114 /* r */:
-                    return "\r";
-                case 39 /* singleQuote */:
-                    return "\'";
-                case 34 /* doubleQuote */:
-                    return "\"";
-                case 117 /* u */:
-                    // '\u{DDDDDDDD}'
-                    if (pos < end && text.charCodeAt(pos) === 123 /* openBrace */) {
-                        hasExtendedUnicodeEscape = true;
-                        pos++;
-                        return scanExtendedUnicodeEscape();
-                    }
-                    // '\uDDDD'
-                    return scanHexadecimalEscape(/*numDigits*/ 4);
-                case 120 /* x */:
-                    // '\xDD'
-                    return scanHexadecimalEscape(/*numDigits*/ 2);
-                // when encountering a LineContinuation (i.e. a backslash and a line terminator sequence),
-                // the line terminator is interpreted to be "the empty code unit sequence".
-                case 13 /* carriageReturn */:
-                    if (pos < end && text.charCodeAt(pos) === 10 /* lineFeed */) {
-                        pos++;
-                    }
-                // fall through
-                case 10 /* lineFeed */:
-                case 8232 /* lineSeparator */:
-                case 8233 /* paragraphSeparator */:
-                    return "";
-                default:
-                    return String.fromCharCode(ch);
+        function parseListElement(parsingContext, parseElement) {
+            var node = currentNode(parsingContext);
+            if (node) {
+                return consumeNode(node);
             }
+            return parseElement();
         }
-        function scanHexadecimalEscape(numDigits) {
-            var escapedValue = scanExactNumberOfHexDigits(numDigits);
-            if (escapedValue >= 0) {
-                return String.fromCharCode(escapedValue);
+        function currentNode(parsingContext) {
+            // If there is an outstanding parse error that we've encountered, but not attached to
+            // some node, then we cannot get a node from the old source tree.  This is because we
+            // want to mark the next node we encounter as being unusable.
+            //
+            // Note: This may be too conservative.  Perhaps we could reuse the node and set the bit
+            // on it (or its leftmost child) as having the error.  For now though, being conservative
+            // is nice and likely won't ever affect perf.
+            if (parseErrorBeforeNextFinishedNode) {
+                return undefined;
             }
-            else {
-                error(ts.Diagnostics.Hexadecimal_digit_expected);
-                return "";
+            if (!syntaxCursor) {
+                // if we don't have a cursor, we could never return a node from the old tree.
+                return undefined;
             }
-        }
-        function scanExtendedUnicodeEscape() {
-            var escapedValue = scanMinimumNumberOfHexDigits(1);
-            var isInvalidExtendedEscape = false;
-            // Validate the value of the digit
-            if (escapedValue < 0) {
-                error(ts.Diagnostics.Hexadecimal_digit_expected);
-                isInvalidExtendedEscape = true;
+            var node = syntaxCursor.currentNode(scanner.getStartPos());
+            // Can't reuse a missing node.
+            if (ts.nodeIsMissing(node)) {
+                return undefined;
             }
-            else if (escapedValue > 0x10FFFF) {
-                error(ts.Diagnostics.An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive);
-                isInvalidExtendedEscape = true;
+            // Can't reuse a node that intersected the change range.
+            if (node.intersectsChange) {
+                return undefined;
             }
-            if (pos >= end) {
-                error(ts.Diagnostics.Unexpected_end_of_text);
-                isInvalidExtendedEscape = true;
+            // Can't reuse a node that contains a parse error.  This is necessary so that we
+            // produce the same set of errors again.
+            if (ts.containsParseError(node)) {
+                return undefined;
             }
-            else if (text.charCodeAt(pos) === 125 /* closeBrace */) {
-                // Only swallow the following character up if it's a '}'.
-                pos++;
+            // We can only reuse a node if it was parsed under the same strict mode that we're
+            // currently in.  i.e. if we originally parsed a node in non-strict mode, but then
+            // the user added 'using strict' at the top of the file, then we can't use that node
+            // again as the presence of strict mode may cause us to parse the tokens in the file
+            // differently.
+            //
+            // Note: we *can* reuse tokens when the strict mode changes.  That's because tokens
+            // are unaffected by strict mode.  It's just the parser will decide what to do with it
+            // differently depending on what mode it is in.
+            //
+            // This also applies to all our other context flags as well.
+            var nodeContextFlags = node.flags & 96256 /* ContextFlags */;
+            if (nodeContextFlags !== contextFlags) {
+                return undefined;
             }
-            else {
-                error(ts.Diagnostics.Unterminated_Unicode_escape_sequence);
-                isInvalidExtendedEscape = true;
+            // Ok, we have a node that looks like it could be reused.  Now verify that it is valid
+            // in the current list parsing context that we're currently at.
+            if (!canReuseNode(node, parsingContext)) {
+                return undefined;
             }
-            if (isInvalidExtendedEscape) {
-                return "";
+            return node;
+        }
+        function consumeNode(node) {
+            // Move the scanner so it is after the node we just consumed.
+            scanner.setTextPos(node.end);
+            nextToken();
+            return node;
+        }
+        function canReuseNode(node, parsingContext) {
+            switch (parsingContext) {
+                case 5 /* ClassMembers */:
+                    return isReusableClassMember(node);
+                case 2 /* SwitchClauses */:
+                    return isReusableSwitchClause(node);
+                case 0 /* SourceElements */:
+                case 1 /* BlockStatements */:
+                case 3 /* SwitchClauseStatements */:
+                    return isReusableStatement(node);
+                case 6 /* EnumMembers */:
+                    return isReusableEnumMember(node);
+                case 4 /* TypeMembers */:
+                    return isReusableTypeMember(node);
+                case 8 /* VariableDeclarations */:
+                    return isReusableVariableDeclaration(node);
+                case 16 /* Parameters */:
+                    return isReusableParameter(node);
+                case 17 /* RestProperties */:
+                    return false;
+                // Any other lists we do not care about reusing nodes in.  But feel free to add if
+                // you can do so safely.  Danger areas involve nodes that may involve speculative
+                // parsing.  If speculative parsing is involved with the node, then the range the
+                // parser reached while looking ahead might be in the edited range (see the example
+                // in canReuseVariableDeclaratorNode for a good case of this).
+                case 21 /* HeritageClauses */:
+                // This would probably be safe to reuse.  There is no speculative parsing with
+                // heritage clauses.
+                case 18 /* TypeParameters */:
+                // This would probably be safe to reuse.  There is no speculative parsing with
+                // type parameters.  Note that that's because type *parameters* only occur in
+                // unambiguous *type* contexts.  While type *arguments* occur in very ambiguous
+                // *expression* contexts.
+                case 20 /* TupleElementTypes */:
+                // This would probably be safe to reuse.  There is no speculative parsing with
+                // tuple types.
+                // Technically, type argument list types are probably safe to reuse.  While
+                // speculative parsing is involved with them (since type argument lists are only
+                // produced from speculative parsing a < as a type argument list), we only have
+                // the types because speculative parsing succeeded.  Thus, the lookahead never
+                // went past the end of the list and rewound.
+                case 19 /* TypeArguments */:
+                // Note: these are almost certainly not safe to ever reuse.  Expressions commonly
+                // need a large amount of lookahead, and we should not reuse them as they may
+                // have actually intersected the edit.
+                case 11 /* ArgumentExpressions */:
+                // This is not safe to reuse for the same reason as the 'AssignmentExpression'
+                // cases.  i.e. a property assignment may end with an expression, and thus might
+                // have lookahead far beyond it's old node.
+                case 12 /* ObjectLiteralMembers */:
+                // This is probably not safe to reuse.  There can be speculative parsing with
+                // type names in a heritage clause.  There can be generic names in the type
+                // name list, and there can be left hand side expressions (which can have type
+                // arguments.)
+                case 7 /* HeritageClauseElement */:
+                // Perhaps safe to reuse, but it's unlikely we'd see more than a dozen attributes
+                // on any given element. Same for children.
+                case 13 /* JsxAttributes */:
+                case 14 /* JsxChildren */:
             }
-            return utf16EncodeAsString(escapedValue);
+            return false;
         }
-        // Derived from the 10.1.1 UTF16Encoding of the ES6 Spec.
-        function utf16EncodeAsString(codePoint) {
-            ts.Debug.assert(0x0 <= codePoint && codePoint <= 0x10FFFF);
-            if (codePoint <= 65535) {
-                return String.fromCharCode(codePoint);
+        function isReusableClassMember(node) {
+            if (node) {
+                switch (node.kind) {
+                    case 152 /* Constructor */:
+                    case 157 /* IndexSignature */:
+                    case 153 /* GetAccessor */:
+                    case 154 /* SetAccessor */:
+                    case 149 /* PropertyDeclaration */:
+                    case 206 /* SemicolonClassElement */:
+                        return true;
+                    case 151 /* MethodDeclaration */:
+                        // Method declarations are not necessarily reusable.  An object-literal
+                        // may have a method calls "constructor(...)" and we must reparse that
+                        // into an actual .ConstructorDeclaration.
+                        var methodDeclaration = node;
+                        var nameIsConstructor = methodDeclaration.name.kind === 71 /* Identifier */ &&
+                            methodDeclaration.name.originalKeywordKind === 123 /* ConstructorKeyword */;
+                        return !nameIsConstructor;
+                }
             }
-            var codeUnit1 = Math.floor((codePoint - 65536) / 1024) + 0xD800;
-            var codeUnit2 = ((codePoint - 65536) % 1024) + 0xDC00;
-            return String.fromCharCode(codeUnit1, codeUnit2);
+            return false;
         }
-        // Current character is known to be a backslash. Check for Unicode escape of the form '\uXXXX'
-        // and return code point value if valid Unicode escape is found. Otherwise return -1.
-        function peekUnicodeEscape() {
-            if (pos + 5 < end && text.charCodeAt(pos + 1) === 117 /* u */) {
-                var start_1 = pos;
-                pos += 2;
-                var value = scanExactNumberOfHexDigits(4);
-                pos = start_1;
-                return value;
+        function isReusableSwitchClause(node) {
+            if (node) {
+                switch (node.kind) {
+                    case 257 /* CaseClause */:
+                    case 258 /* DefaultClause */:
+                        return true;
+                }
             }
-            return -1;
+            return false;
         }
-        function scanIdentifierParts() {
-            var result = "";
-            var start = pos;
-            while (pos < end) {
-                var ch = text.charCodeAt(pos);
-                if (isIdentifierPart(ch, languageVersion)) {
-                    pos++;
-                }
-                else if (ch === 92 /* backslash */) {
-                    ch = peekUnicodeEscape();
-                    if (!(ch >= 0 && isIdentifierPart(ch, languageVersion))) {
-                        break;
-                    }
-                    result += text.substring(start, pos);
-                    result += String.fromCharCode(ch);
-                    // Valid Unicode escape is always six characters
-                    pos += 6;
-                    start = pos;
-                }
-                else {
-                    break;
+        function isReusableStatement(node) {
+            if (node) {
+                switch (node.kind) {
+                    case 228 /* FunctionDeclaration */:
+                    case 208 /* VariableStatement */:
+                    case 207 /* Block */:
+                    case 211 /* IfStatement */:
+                    case 210 /* ExpressionStatement */:
+                    case 223 /* ThrowStatement */:
+                    case 219 /* ReturnStatement */:
+                    case 221 /* SwitchStatement */:
+                    case 218 /* BreakStatement */:
+                    case 217 /* ContinueStatement */:
+                    case 215 /* ForInStatement */:
+                    case 216 /* ForOfStatement */:
+                    case 214 /* ForStatement */:
+                    case 213 /* WhileStatement */:
+                    case 220 /* WithStatement */:
+                    case 209 /* EmptyStatement */:
+                    case 224 /* TryStatement */:
+                    case 222 /* LabeledStatement */:
+                    case 212 /* DoStatement */:
+                    case 225 /* DebuggerStatement */:
+                    case 238 /* ImportDeclaration */:
+                    case 237 /* ImportEqualsDeclaration */:
+                    case 244 /* ExportDeclaration */:
+                    case 243 /* ExportAssignment */:
+                    case 233 /* ModuleDeclaration */:
+                    case 229 /* ClassDeclaration */:
+                    case 230 /* InterfaceDeclaration */:
+                    case 232 /* EnumDeclaration */:
+                    case 231 /* TypeAliasDeclaration */:
+                        return true;
                 }
             }
-            result += text.substring(start, pos);
-            return result;
+            return false;
         }
-        function getIdentifierToken() {
-            // Reserved words are between 2 and 11 characters long and start with a lowercase letter
-            var len = tokenValue.length;
-            if (len >= 2 && len <= 11) {
-                var ch = tokenValue.charCodeAt(0);
-                if (ch >= 97 /* a */ && ch <= 122 /* z */ && hasOwnProperty.call(textToToken, tokenValue)) {
-                    return token = textToToken[tokenValue];
+        function isReusableEnumMember(node) {
+            return node.kind === 264 /* EnumMember */;
+        }
+        function isReusableTypeMember(node) {
+            if (node) {
+                switch (node.kind) {
+                    case 156 /* ConstructSignature */:
+                    case 150 /* MethodSignature */:
+                    case 157 /* IndexSignature */:
+                    case 148 /* PropertySignature */:
+                    case 155 /* CallSignature */:
+                        return true;
                 }
             }
-            return token = 69 /* Identifier */;
+            return false;
         }
-        function scanBinaryOrOctalDigits(base) {
-            ts.Debug.assert(base !== 2 || base !== 8, "Expected either base 2 or base 8");
-            var value = 0;
-            // For counting number of digits; Valid binaryIntegerLiteral must have at least one binary digit following B or b.
-            // Similarly valid octalIntegerLiteral must have at least one octal digit following o or O.
-            var numberOfDigits = 0;
-            while (true) {
-                var ch = text.charCodeAt(pos);
-                var valueOfCh = ch - 48 /* _0 */;
-                if (!isDigit(ch) || valueOfCh >= base) {
-                    break;
-                }
-                value = value * base + valueOfCh;
-                pos++;
-                numberOfDigits++;
+        function isReusableVariableDeclaration(node) {
+            if (node.kind !== 226 /* VariableDeclaration */) {
+                return false;
             }
-            // Invalid binaryIntegerLiteral or octalIntegerLiteral
-            if (numberOfDigits === 0) {
-                return -1;
+            // Very subtle incremental parsing bug.  Consider the following code:
+            //
+            //      let v = new List < A, B
+            //
+            // This is actually legal code.  It's a list of variable declarators "v = new List<A"
+            // on one side and "B" on the other. If you then change that to:
+            //
+            //      let v = new List < A, B >()
+            //
+            // then we have a problem.  "v = new List<A" doesn't intersect the change range, so we
+            // start reparsing at "B" and we completely fail to handle this properly.
+            //
+            // In order to prevent this, we do not allow a variable declarator to be reused if it
+            // has an initializer.
+            var variableDeclarator = node;
+            return variableDeclarator.initializer === undefined;
+        }
+        function isReusableParameter(node) {
+            if (node.kind !== 146 /* Parameter */) {
+                return false;
             }
-            return value;
+            // See the comment in isReusableVariableDeclaration for why we do this.
+            var parameter = node;
+            return parameter.initializer === undefined;
         }
-        function scan() {
-            startPos = pos;
-            hasExtendedUnicodeEscape = false;
-            precedingLineBreak = false;
-            tokenIsUnterminated = false;
-            while (true) {
-                tokenPos = pos;
-                if (pos >= end) {
-                    return token = 1 /* EndOfFileToken */;
-                }
-                var ch = text.charCodeAt(pos);
-                // Special handling for shebang
-                if (ch === 35 /* hash */ && pos === 0 && isShebangTrivia(text, pos)) {
-                    pos = scanShebangTrivia(text, pos);
-                    if (skipTrivia) {
-                        continue;
-                    }
-                    else {
-                        return token = 6 /* ShebangTrivia */;
-                    }
-                }
-                switch (ch) {
-                    case 10 /* lineFeed */:
-                    case 13 /* carriageReturn */:
-                        precedingLineBreak = true;
-                        if (skipTrivia) {
-                            pos++;
-                            continue;
-                        }
-                        else {
-                            if (ch === 13 /* carriageReturn */ && pos + 1 < end && text.charCodeAt(pos + 1) === 10 /* lineFeed */) {
-                                // consume both CR and LF
-                                pos += 2;
-                            }
-                            else {
-                                pos++;
-                            }
-                            return token = 4 /* NewLineTrivia */;
-                        }
-                    case 9 /* tab */:
-                    case 11 /* verticalTab */:
-                    case 12 /* formFeed */:
-                    case 32 /* space */:
-                        if (skipTrivia) {
-                            pos++;
-                            continue;
-                        }
-                        else {
-                            while (pos < end && isWhiteSpaceSingleLine(text.charCodeAt(pos))) {
-                                pos++;
-                            }
-                            return token = 5 /* WhitespaceTrivia */;
-                        }
-                    case 33 /* exclamation */:
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            if (text.charCodeAt(pos + 2) === 61 /* equals */) {
-                                return pos += 3, token = 33 /* ExclamationEqualsEqualsToken */;
-                            }
-                            return pos += 2, token = 31 /* ExclamationEqualsToken */;
-                        }
-                        pos++;
-                        return token = 49 /* ExclamationToken */;
-                    case 34 /* doubleQuote */:
-                    case 39 /* singleQuote */:
-                        tokenValue = scanString();
-                        return token = 9 /* StringLiteral */;
-                    case 96 /* backtick */:
-                        return token = scanTemplateAndSetTokenValue();
-                    case 37 /* percent */:
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            return pos += 2, token = 62 /* PercentEqualsToken */;
-                        }
-                        pos++;
-                        return token = 40 /* PercentToken */;
-                    case 38 /* ampersand */:
-                        if (text.charCodeAt(pos + 1) === 38 /* ampersand */) {
-                            return pos += 2, token = 51 /* AmpersandAmpersandToken */;
-                        }
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            return pos += 2, token = 66 /* AmpersandEqualsToken */;
-                        }
-                        pos++;
-                        return token = 46 /* AmpersandToken */;
-                    case 40 /* openParen */:
-                        pos++;
-                        return token = 17 /* OpenParenToken */;
-                    case 41 /* closeParen */:
-                        pos++;
-                        return token = 18 /* CloseParenToken */;
-                    case 42 /* asterisk */:
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            return pos += 2, token = 59 /* AsteriskEqualsToken */;
-                        }
-                        if (text.charCodeAt(pos + 1) === 42 /* asterisk */) {
-                            if (text.charCodeAt(pos + 2) === 61 /* equals */) {
-                                return pos += 3, token = 60 /* AsteriskAsteriskEqualsToken */;
-                            }
-                            return pos += 2, token = 38 /* AsteriskAsteriskToken */;
-                        }
-                        pos++;
-                        return token = 37 /* AsteriskToken */;
-                    case 43 /* plus */:
-                        if (text.charCodeAt(pos + 1) === 43 /* plus */) {
-                            return pos += 2, token = 41 /* PlusPlusToken */;
-                        }
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            return pos += 2, token = 57 /* PlusEqualsToken */;
-                        }
-                        pos++;
-                        return token = 35 /* PlusToken */;
-                    case 44 /* comma */:
-                        pos++;
-                        return token = 24 /* CommaToken */;
-                    case 45 /* minus */:
-                        if (text.charCodeAt(pos + 1) === 45 /* minus */) {
-                            return pos += 2, token = 42 /* MinusMinusToken */;
-                        }
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            return pos += 2, token = 58 /* MinusEqualsToken */;
-                        }
-                        pos++;
-                        return token = 36 /* MinusToken */;
-                    case 46 /* dot */:
-                        if (isDigit(text.charCodeAt(pos + 1))) {
-                            tokenValue = scanNumber();
-                            return token = 8 /* NumericLiteral */;
-                        }
-                        if (text.charCodeAt(pos + 1) === 46 /* dot */ && text.charCodeAt(pos + 2) === 46 /* dot */) {
-                            return pos += 3, token = 22 /* DotDotDotToken */;
-                        }
-                        pos++;
-                        return token = 21 /* DotToken */;
-                    case 47 /* slash */:
-                        // Single-line comment
-                        if (text.charCodeAt(pos + 1) === 47 /* slash */) {
-                            pos += 2;
-                            while (pos < end) {
-                                if (isLineBreak(text.charCodeAt(pos))) {
-                                    break;
-                                }
-                                pos++;
-                            }
-                            if (skipTrivia) {
-                                continue;
-                            }
-                            else {
-                                return token = 2 /* SingleLineCommentTrivia */;
-                            }
-                        }
-                        // Multi-line comment
-                        if (text.charCodeAt(pos + 1) === 42 /* asterisk */) {
-                            pos += 2;
-                            var commentClosed = false;
-                            while (pos < end) {
-                                var ch_2 = text.charCodeAt(pos);
-                                if (ch_2 === 42 /* asterisk */ && text.charCodeAt(pos + 1) === 47 /* slash */) {
-                                    pos += 2;
-                                    commentClosed = true;
-                                    break;
-                                }
-                                if (isLineBreak(ch_2)) {
-                                    precedingLineBreak = true;
-                                }
-                                pos++;
-                            }
-                            if (!commentClosed) {
-                                error(ts.Diagnostics.Asterisk_Slash_expected);
-                            }
-                            if (skipTrivia) {
-                                continue;
-                            }
-                            else {
-                                tokenIsUnterminated = !commentClosed;
-                                return token = 3 /* MultiLineCommentTrivia */;
-                            }
-                        }
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            return pos += 2, token = 61 /* SlashEqualsToken */;
-                        }
-                        pos++;
-                        return token = 39 /* SlashToken */;
-                    case 48 /* _0 */:
-                        if (pos + 2 < end && (text.charCodeAt(pos + 1) === 88 /* X */ || text.charCodeAt(pos + 1) === 120 /* x */)) {
-                            pos += 2;
-                            var value = scanMinimumNumberOfHexDigits(1);
-                            if (value < 0) {
-                                error(ts.Diagnostics.Hexadecimal_digit_expected);
-                                value = 0;
-                            }
-                            tokenValue = "" + value;
-                            return token = 8 /* NumericLiteral */;
-                        }
-                        else if (pos + 2 < end && (text.charCodeAt(pos + 1) === 66 /* B */ || text.charCodeAt(pos + 1) === 98 /* b */)) {
-                            pos += 2;
-                            var value = scanBinaryOrOctalDigits(/* base */ 2);
-                            if (value < 0) {
-                                error(ts.Diagnostics.Binary_digit_expected);
-                                value = 0;
-                            }
-                            tokenValue = "" + value;
-                            return token = 8 /* NumericLiteral */;
-                        }
-                        else if (pos + 2 < end && (text.charCodeAt(pos + 1) === 79 /* O */ || text.charCodeAt(pos + 1) === 111 /* o */)) {
-                            pos += 2;
-                            var value = scanBinaryOrOctalDigits(/* base */ 8);
-                            if (value < 0) {
-                                error(ts.Diagnostics.Octal_digit_expected);
-                                value = 0;
-                            }
-                            tokenValue = "" + value;
-                            return token = 8 /* NumericLiteral */;
-                        }
-                        // Try to parse as an octal
-                        if (pos + 1 < end && isOctalDigit(text.charCodeAt(pos + 1))) {
-                            tokenValue = "" + scanOctalDigits();
-                            return token = 8 /* NumericLiteral */;
-                        }
-                    // This fall-through is a deviation from the EcmaScript grammar. The grammar says that a leading zero
-                    // can only be followed by an octal digit, a dot, or the end of the number literal. However, we are being
-                    // permissive and allowing decimal digits of the form 08* and 09* (which many browsers also do).
-                    case 49 /* _1 */:
-                    case 50 /* _2 */:
-                    case 51 /* _3 */:
-                    case 52 /* _4 */:
-                    case 53 /* _5 */:
-                    case 54 /* _6 */:
-                    case 55 /* _7 */:
-                    case 56 /* _8 */:
-                    case 57 /* _9 */:
-                        tokenValue = scanNumber();
-                        return token = 8 /* NumericLiteral */;
-                    case 58 /* colon */:
-                        pos++;
-                        return token = 54 /* ColonToken */;
-                    case 59 /* semicolon */:
-                        pos++;
-                        return token = 23 /* SemicolonToken */;
-                    case 60 /* lessThan */:
-                        if (isConflictMarkerTrivia(text, pos)) {
-                            pos = scanConflictMarkerTrivia(text, pos, error);
-                            if (skipTrivia) {
-                                continue;
-                            }
-                            else {
-                                return token = 7 /* ConflictMarkerTrivia */;
-                            }
-                        }
-                        if (text.charCodeAt(pos + 1) === 60 /* lessThan */) {
-                            if (text.charCodeAt(pos + 2) === 61 /* equals */) {
-                                return pos += 3, token = 63 /* LessThanLessThanEqualsToken */;
-                            }
-                            return pos += 2, token = 43 /* LessThanLessThanToken */;
-                        }
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            return pos += 2, token = 28 /* LessThanEqualsToken */;
-                        }
-                        if (languageVariant === 1 /* JSX */ &&
-                            text.charCodeAt(pos + 1) === 47 /* slash */ &&
-                            text.charCodeAt(pos + 2) !== 42 /* asterisk */) {
-                            return pos += 2, token = 26 /* LessThanSlashToken */;
-                        }
-                        pos++;
-                        return token = 25 /* LessThanToken */;
-                    case 61 /* equals */:
-                        if (isConflictMarkerTrivia(text, pos)) {
-                            pos = scanConflictMarkerTrivia(text, pos, error);
-                            if (skipTrivia) {
-                                continue;
-                            }
-                            else {
-                                return token = 7 /* ConflictMarkerTrivia */;
-                            }
-                        }
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            if (text.charCodeAt(pos + 2) === 61 /* equals */) {
-                                return pos += 3, token = 32 /* EqualsEqualsEqualsToken */;
-                            }
-                            return pos += 2, token = 30 /* EqualsEqualsToken */;
-                        }
-                        if (text.charCodeAt(pos + 1) === 62 /* greaterThan */) {
-                            return pos += 2, token = 34 /* EqualsGreaterThanToken */;
-                        }
-                        pos++;
-                        return token = 56 /* EqualsToken */;
-                    case 62 /* greaterThan */:
-                        if (isConflictMarkerTrivia(text, pos)) {
-                            pos = scanConflictMarkerTrivia(text, pos, error);
-                            if (skipTrivia) {
-                                continue;
-                            }
-                            else {
-                                return token = 7 /* ConflictMarkerTrivia */;
-                            }
-                        }
-                        pos++;
-                        return token = 27 /* GreaterThanToken */;
-                    case 63 /* question */:
-                        pos++;
-                        return token = 53 /* QuestionToken */;
-                    case 91 /* openBracket */:
-                        pos++;
-                        return token = 19 /* OpenBracketToken */;
-                    case 93 /* closeBracket */:
-                        pos++;
-                        return token = 20 /* CloseBracketToken */;
-                    case 94 /* caret */:
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            return pos += 2, token = 68 /* CaretEqualsToken */;
-                        }
-                        pos++;
-                        return token = 48 /* CaretToken */;
-                    case 123 /* openBrace */:
-                        pos++;
-                        return token = 15 /* OpenBraceToken */;
-                    case 124 /* bar */:
-                        if (text.charCodeAt(pos + 1) === 124 /* bar */) {
-                            return pos += 2, token = 52 /* BarBarToken */;
-                        }
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            return pos += 2, token = 67 /* BarEqualsToken */;
-                        }
-                        pos++;
-                        return token = 47 /* BarToken */;
-                    case 125 /* closeBrace */:
-                        pos++;
-                        return token = 16 /* CloseBraceToken */;
-                    case 126 /* tilde */:
-                        pos++;
-                        return token = 50 /* TildeToken */;
-                    case 64 /* at */:
-                        pos++;
-                        return token = 55 /* AtToken */;
-                    case 92 /* backslash */:
-                        var cookedChar = peekUnicodeEscape();
-                        if (cookedChar >= 0 && isIdentifierStart(cookedChar, languageVersion)) {
-                            pos += 6;
-                            tokenValue = String.fromCharCode(cookedChar) + scanIdentifierParts();
-                            return token = getIdentifierToken();
-                        }
-                        error(ts.Diagnostics.Invalid_character);
-                        pos++;
-                        return token = 0 /* Unknown */;
-                    default:
-                        if (isIdentifierStart(ch, languageVersion)) {
-                            pos++;
-                            while (pos < end && isIdentifierPart(ch = text.charCodeAt(pos), languageVersion))
-                                pos++;
-                            tokenValue = text.substring(tokenPos, pos);
-                            if (ch === 92 /* backslash */) {
-                                tokenValue += scanIdentifierParts();
-                            }
-                            return token = getIdentifierToken();
-                        }
-                        else if (isWhiteSpaceSingleLine(ch)) {
-                            pos++;
-                            continue;
-                        }
-                        else if (isLineBreak(ch)) {
-                            precedingLineBreak = true;
-                            pos++;
-                            continue;
-                        }
-                        error(ts.Diagnostics.Invalid_character);
-                        pos++;
-                        return token = 0 /* Unknown */;
-                }
+        // Returns true if we should abort parsing.
+        function abortParsingListOrMoveToNextToken(kind) {
+            parseErrorAtCurrentToken(parsingContextErrors(kind));
+            if (isInSomeParsingContext()) {
+                return true;
             }
+            nextToken();
+            return false;
         }
-        function reScanGreaterToken() {
-            if (token === 27 /* GreaterThanToken */) {
-                if (text.charCodeAt(pos) === 62 /* greaterThan */) {
-                    if (text.charCodeAt(pos + 1) === 62 /* greaterThan */) {
-                        if (text.charCodeAt(pos + 2) === 61 /* equals */) {
-                            return pos += 3, token = 65 /* GreaterThanGreaterThanGreaterThanEqualsToken */;
-                        }
-                        return pos += 2, token = 45 /* GreaterThanGreaterThanGreaterThanToken */;
-                    }
-                    if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                        return pos += 2, token = 64 /* GreaterThanGreaterThanEqualsToken */;
-                    }
-                    pos++;
-                    return token = 44 /* GreaterThanGreaterThanToken */;
-                }
-                if (text.charCodeAt(pos) === 61 /* equals */) {
-                    pos++;
-                    return token = 29 /* GreaterThanEqualsToken */;
-                }
+        function parsingContextErrors(context) {
+            switch (context) {
+                case 0 /* SourceElements */: return ts.Diagnostics.Declaration_or_statement_expected;
+                case 1 /* BlockStatements */: return ts.Diagnostics.Declaration_or_statement_expected;
+                case 2 /* SwitchClauses */: return ts.Diagnostics.case_or_default_expected;
+                case 3 /* SwitchClauseStatements */: return ts.Diagnostics.Statement_expected;
+                case 17 /* RestProperties */: // fallthrough
+                case 4 /* TypeMembers */: return ts.Diagnostics.Property_or_signature_expected;
+                case 5 /* ClassMembers */: return ts.Diagnostics.Unexpected_token_A_constructor_method_accessor_or_property_was_expected;
+                case 6 /* EnumMembers */: return ts.Diagnostics.Enum_member_expected;
+                case 7 /* HeritageClauseElement */: return ts.Diagnostics.Expression_expected;
+                case 8 /* VariableDeclarations */: return ts.Diagnostics.Variable_declaration_expected;
+                case 9 /* ObjectBindingElements */: return ts.Diagnostics.Property_destructuring_pattern_expected;
+                case 10 /* ArrayBindingElements */: return ts.Diagnostics.Array_element_destructuring_pattern_expected;
+                case 11 /* ArgumentExpressions */: return ts.Diagnostics.Argument_expression_expected;
+                case 12 /* ObjectLiteralMembers */: return ts.Diagnostics.Property_assignment_expected;
+                case 15 /* ArrayLiteralMembers */: return ts.Diagnostics.Expression_or_comma_expected;
+                case 16 /* Parameters */: return ts.Diagnostics.Parameter_declaration_expected;
+                case 18 /* TypeParameters */: return ts.Diagnostics.Type_parameter_declaration_expected;
+                case 19 /* TypeArguments */: return ts.Diagnostics.Type_argument_expected;
+                case 20 /* TupleElementTypes */: return ts.Diagnostics.Type_expected;
+                case 21 /* HeritageClauses */: return ts.Diagnostics.Unexpected_token_expected;
+                case 22 /* ImportOrExportSpecifiers */: return ts.Diagnostics.Identifier_expected;
+                case 13 /* JsxAttributes */: return ts.Diagnostics.Identifier_expected;
+                case 14 /* JsxChildren */: return ts.Diagnostics.Identifier_expected;
+                case 23 /* JSDocFunctionParameters */: return ts.Diagnostics.Parameter_declaration_expected;
+                case 24 /* JSDocTypeArguments */: return ts.Diagnostics.Type_argument_expected;
+                case 26 /* JSDocTupleTypes */: return ts.Diagnostics.Type_expected;
+                case 25 /* JSDocRecordMembers */: return ts.Diagnostics.Property_assignment_expected;
             }
-            return token;
         }
-        function reScanSlashToken() {
-            if (token === 39 /* SlashToken */ || token === 61 /* SlashEqualsToken */) {
-                var p = tokenPos + 1;
-                var inEscape = false;
-                var inCharacterClass = false;
-                while (true) {
-                    // If we reach the end of a file, or hit a newline, then this is an unterminated
-                    // regex.  Report error and return what we have so far.
-                    if (p >= end) {
-                        tokenIsUnterminated = true;
-                        error(ts.Diagnostics.Unterminated_regular_expression_literal);
-                        break;
-                    }
-                    var ch = text.charCodeAt(p);
-                    if (isLineBreak(ch)) {
-                        tokenIsUnterminated = true;
-                        error(ts.Diagnostics.Unterminated_regular_expression_literal);
-                        break;
-                    }
-                    if (inEscape) {
-                        // Parsing an escape character;
-                        // reset the flag and just advance to the next char.
-                        inEscape = false;
+        // Parses a comma-delimited list of elements
+        function parseDelimitedList(kind, parseElement, considerSemicolonAsDelimiter) {
+            var saveParsingContext = parsingContext;
+            parsingContext |= 1 << kind;
+            var result = createNodeArray();
+            var commaStart = -1; // Meaning the previous token was not a comma
+            while (true) {
+                if (isListElement(kind, /*inErrorRecovery*/ false)) {
+                    result.push(parseListElement(kind, parseElement));
+                    commaStart = scanner.getTokenPos();
+                    if (parseOptional(26 /* CommaToken */)) {
+                        continue;
                     }
-                    else if (ch === 47 /* slash */ && !inCharacterClass) {
-                        // A slash within a character class is permissible,
-                        // but in general it signals the end of the regexp literal.
-                        p++;
+                    commaStart = -1; // Back to the state where the last token was not a comma
+                    if (isListTerminator(kind)) {
                         break;
                     }
-                    else if (ch === 91 /* openBracket */) {
-                        inCharacterClass = true;
-                    }
-                    else if (ch === 92 /* backslash */) {
-                        inEscape = true;
-                    }
-                    else if (ch === 93 /* closeBracket */) {
-                        inCharacterClass = false;
+                    // We didn't get a comma, and the list wasn't terminated, explicitly parse
+                    // out a comma so we give a good error message.
+                    parseExpected(26 /* CommaToken */);
+                    // If the token was a semicolon, and the caller allows that, then skip it and
+                    // continue.  This ensures we get back on track and don't result in tons of
+                    // parse errors.  For example, this can happen when people do things like use
+                    // a semicolon to delimit object literal members.   Note: we'll have already
+                    // reported an error when we called parseExpected above.
+                    if (considerSemicolonAsDelimiter && token() === 25 /* SemicolonToken */ && !scanner.hasPrecedingLineBreak()) {
+                        nextToken();
                     }
-                    p++;
+                    continue;
                 }
-                while (p < end && isIdentifierPart(text.charCodeAt(p), languageVersion)) {
-                    p++;
+                if (isListTerminator(kind)) {
+                    break;
+                }
+                if (abortParsingListOrMoveToNextToken(kind)) {
+                    break;
                 }
-                pos = p;
-                tokenValue = text.substring(tokenPos, pos);
-                token = 10 /* RegularExpressionLiteral */;
             }
-            return token;
+            // Recording the trailing comma is deliberately done after the previous
+            // loop, and not just if we see a list terminator. This is because the list
+            // may have ended incorrectly, but it is still important to know if there
+            // was a trailing comma.
+            // Check if the last token was a comma.
+            if (commaStart >= 0) {
+                // Always preserve a trailing comma by marking it on the NodeArray
+                result.hasTrailingComma = true;
+            }
+            result.end = getNodeEnd();
+            parsingContext = saveParsingContext;
+            return result;
         }
-        /**
-         * Unconditionally back up and scan a template expression portion.
-         */
-        function reScanTemplateToken() {
-            ts.Debug.assert(token === 16 /* CloseBraceToken */, "'reScanTemplateToken' should only be called on a '}'");
-            pos = tokenPos;
-            return token = scanTemplateAndSetTokenValue();
+        function createMissingList() {
+            return createNodeArray();
         }
-        function reScanJsxToken() {
-            pos = tokenPos = startPos;
-            return token = scanJsxToken();
+        function parseBracketedList(kind, parseElement, open, close) {
+            if (parseExpected(open)) {
+                var result = parseDelimitedList(kind, parseElement);
+                parseExpected(close);
+                return result;
+            }
+            return createMissingList();
         }
-        function scanJsxToken() {
-            startPos = tokenPos = pos;
-            if (pos >= end) {
-                return token = 1 /* EndOfFileToken */;
+        // The allowReservedWords parameter controls whether reserved words are permitted after the first dot
+        function parseEntityName(allowReservedWords, diagnosticMessage) {
+            var entity = parseIdentifier(diagnosticMessage);
+            while (parseOptional(23 /* DotToken */)) {
+                var node = createNode(143 /* QualifiedName */, entity.pos); // !!!
+                node.left = entity;
+                node.right = parseRightSideOfDot(allowReservedWords);
+                entity = finishNode(node);
             }
-            var char = text.charCodeAt(pos);
-            if (char === 60 /* lessThan */) {
-                if (text.charCodeAt(pos + 1) === 47 /* slash */) {
-                    pos += 2;
-                    return token = 26 /* LessThanSlashToken */;
+            return entity;
+        }
+        function parseRightSideOfDot(allowIdentifierNames) {
+            // Technically a keyword is valid here as all identifiers and keywords are identifier names.
+            // However, often we'll encounter this in error situations when the identifier or keyword
+            // is actually starting another valid construct.
+            //
+            // So, we check for the following specific case:
+            //
+            //      name.
+            //      identifierOrKeyword identifierNameOrKeyword
+            //
+            // Note: the newlines are important here.  For example, if that above code
+            // were rewritten into:
+            //
+            //      name.identifierOrKeyword
+            //      identifierNameOrKeyword
+            //
+            // Then we would consider it valid.  That's because ASI would take effect and
+            // the code would be implicitly: "name.identifierOrKeyword; identifierNameOrKeyword".
+            // In the first case though, ASI will not take effect because there is not a
+            // line terminator after the identifier or keyword.
+            if (scanner.hasPrecedingLineBreak() && ts.tokenIsIdentifierOrKeyword(token())) {
+                var matchesPattern = lookAhead(nextTokenIsIdentifierOrKeywordOnSameLine);
+                if (matchesPattern) {
+                    // Report that we need an identifier.  However, report it right after the dot,
+                    // and not on the next token.  This is because the next token might actually
+                    // be an identifier and the error would be quite confusing.
+                    return createMissingNode(71 /* Identifier */, /*reportAtCurrentPosition*/ true, ts.Diagnostics.Identifier_expected);
                 }
-                pos++;
-                return token = 25 /* LessThanToken */;
             }
-            if (char === 123 /* openBrace */) {
-                pos++;
-                return token = 15 /* OpenBraceToken */;
+            return allowIdentifierNames ? parseIdentifierName() : parseIdentifier();
+        }
+        function parseTemplateExpression() {
+            var template = createNode(196 /* TemplateExpression */);
+            template.head = parseTemplateHead();
+            ts.Debug.assert(template.head.kind === 14 /* TemplateHead */, "Template head has wrong token kind");
+            var templateSpans = createNodeArray();
+            do {
+                templateSpans.push(parseTemplateSpan());
+            } while (ts.lastOrUndefined(templateSpans).literal.kind === 15 /* TemplateMiddle */);
+            templateSpans.end = getNodeEnd();
+            template.templateSpans = templateSpans;
+            return finishNode(template);
+        }
+        function parseTemplateSpan() {
+            var span = createNode(205 /* TemplateSpan */);
+            span.expression = allowInAnd(parseExpression);
+            var literal;
+            if (token() === 18 /* CloseBraceToken */) {
+                reScanTemplateToken();
+                literal = parseTemplateMiddleOrTemplateTail();
             }
-            while (pos < end) {
-                pos++;
-                char = text.charCodeAt(pos);
-                if ((char === 123 /* openBrace */) || (char === 60 /* lessThan */)) {
-                    break;
+            else {
+                literal = parseExpectedToken(16 /* TemplateTail */, /*reportAtCurrentPosition*/ false, ts.Diagnostics._0_expected, ts.tokenToString(18 /* CloseBraceToken */));
+            }
+            span.literal = literal;
+            return finishNode(span);
+        }
+        function parseLiteralNode(internName) {
+            return parseLiteralLikeNode(token(), internName);
+        }
+        function parseTemplateHead() {
+            var fragment = parseLiteralLikeNode(token(), /*internName*/ false);
+            ts.Debug.assert(fragment.kind === 14 /* TemplateHead */, "Template head has wrong token kind");
+            return fragment;
+        }
+        function parseTemplateMiddleOrTemplateTail() {
+            var fragment = parseLiteralLikeNode(token(), /*internName*/ false);
+            ts.Debug.assert(fragment.kind === 15 /* TemplateMiddle */ || fragment.kind === 16 /* TemplateTail */, "Template fragment has wrong token kind");
+            return fragment;
+        }
+        function parseLiteralLikeNode(kind, internName) {
+            var node = createNode(kind);
+            var text = scanner.getTokenValue();
+            node.text = internName ? internIdentifier(text) : text;
+            if (scanner.hasExtendedUnicodeEscape()) {
+                node.hasExtendedUnicodeEscape = true;
+            }
+            if (scanner.isUnterminated()) {
+                node.isUnterminated = true;
+            }
+            // Octal literals are not allowed in strict mode or ES5
+            // Note that theoretically the following condition would hold true literals like 009,
+            // which is not octal.But because of how the scanner separates the tokens, we would
+            // never get a token like this. Instead, we would get 00 and 9 as two separate tokens.
+            // We also do not need to check for negatives because any prefix operator would be part of a
+            // parent unary expression.
+            if (node.kind === 8 /* NumericLiteral */) {
+                node.numericLiteralFlags = scanner.getNumericLiteralFlags();
+            }
+            nextToken();
+            finishNode(node);
+            return node;
+        }
+        // TYPES
+        function parseTypeReference() {
+            var node = createNode(159 /* TypeReference */);
+            node.typeName = parseEntityName(/*allowReservedWords*/ false, ts.Diagnostics.Type_expected);
+            if (!scanner.hasPrecedingLineBreak() && token() === 27 /* LessThanToken */) {
+                node.typeArguments = parseBracketedList(19 /* TypeArguments */, parseType, 27 /* LessThanToken */, 29 /* GreaterThanToken */);
+            }
+            return finishNode(node);
+        }
+        function parseThisTypePredicate(lhs) {
+            nextToken();
+            var node = createNode(158 /* TypePredicate */, lhs.pos);
+            node.parameterName = lhs;
+            node.type = parseType();
+            return finishNode(node);
+        }
+        function parseThisTypeNode() {
+            var node = createNode(169 /* ThisType */);
+            nextToken();
+            return finishNode(node);
+        }
+        function parseTypeQuery() {
+            var node = createNode(162 /* TypeQuery */);
+            parseExpected(103 /* TypeOfKeyword */);
+            node.exprName = parseEntityName(/*allowReservedWords*/ true);
+            return finishNode(node);
+        }
+        function parseTypeParameter() {
+            var node = createNode(145 /* TypeParameter */);
+            node.name = parseIdentifier();
+            if (parseOptional(85 /* ExtendsKeyword */)) {
+                // It's not uncommon for people to write improper constraints to a generic.  If the
+                // user writes a constraint that is an expression and not an actual type, then parse
+                // it out as an expression (so we can recover well), but report that a type is needed
+                // instead.
+                if (isStartOfType() || !isStartOfExpression()) {
+                    node.constraint = parseType();
+                }
+                else {
+                    // It was not a type, and it looked like an expression.  Parse out an expression
+                    // here so we recover well.  Note: it is important that we call parseUnaryExpression
+                    // and not parseExpression here.  If the user has:
+                    //
+                    //      <T extends "">
+                    //
+                    // We do *not* want to consume the  >  as we're consuming the expression for "".
+                    node.expression = parseUnaryExpressionOrHigher();
                 }
             }
-            return token = 244 /* JsxText */;
+            if (parseOptional(58 /* EqualsToken */)) {
+                node.default = parseType();
+            }
+            return finishNode(node);
+        }
+        function parseTypeParameters() {
+            if (token() === 27 /* LessThanToken */) {
+                return parseBracketedList(18 /* TypeParameters */, parseTypeParameter, 27 /* LessThanToken */, 29 /* GreaterThanToken */);
+            }
         }
-        // Scans a JSX identifier; these differ from normal identifiers in that
-        // they allow dashes
-        function scanJsxIdentifier() {
-            if (tokenIsIdentifierOrKeyword(token)) {
-                var firstCharPosition = pos;
-                while (pos < end) {
-                    var ch = text.charCodeAt(pos);
-                    if (ch === 45 /* minus */ || ((firstCharPosition === pos) ? isIdentifierStart(ch, languageVersion) : isIdentifierPart(ch, languageVersion))) {
-                        pos++;
-                    }
-                    else {
-                        break;
-                    }
+        function parseParameterType() {
+            if (parseOptional(56 /* ColonToken */)) {
+                return parseType();
+            }
+            return undefined;
+        }
+        function isStartOfParameter() {
+            return token() === 24 /* DotDotDotToken */ || isIdentifierOrPattern() || ts.isModifierKind(token()) || token() === 57 /* AtToken */ || token() === 99 /* ThisKeyword */;
+        }
+        function parseParameter() {
+            var node = createNode(146 /* Parameter */);
+            if (token() === 99 /* ThisKeyword */) {
+                node.name = createIdentifier(/*isIdentifier*/ true);
+                node.type = parseParameterType();
+                return finishNode(node);
+            }
+            node.decorators = parseDecorators();
+            node.modifiers = parseModifiers();
+            node.dotDotDotToken = parseOptionalToken(24 /* DotDotDotToken */);
+            // FormalParameter [Yield,Await]:
+            //      BindingElement[?Yield,?Await]
+            node.name = parseIdentifierOrPattern();
+            if (ts.getFullWidth(node.name) === 0 && !ts.hasModifiers(node) && ts.isModifierKind(token())) {
+                // in cases like
+                // 'use strict'
+                // function foo(static)
+                // isParameter('static') === true, because of isModifier('static')
+                // however 'static' is not a legal identifier in a strict mode.
+                // so result of this function will be ParameterDeclaration (flags = 0, name = missing, type = undefined, initializer = undefined)
+                // and current token will not change => parsing of the enclosing parameter list will last till the end of time (or OOM)
+                // to avoid this we'll advance cursor to the next token.
+                nextToken();
+            }
+            node.questionToken = parseOptionalToken(55 /* QuestionToken */);
+            node.type = parseParameterType();
+            node.initializer = parseBindingElementInitializer(/*inParameter*/ true);
+            // Do not check for initializers in an ambient context for parameters. This is not
+            // a grammar error because the grammar allows arbitrary call signatures in
+            // an ambient context.
+            // It is actually not necessary for this to be an error at all. The reason is that
+            // function/constructor implementations are syntactically disallowed in ambient
+            // contexts. In addition, parameter initializers are semantically disallowed in
+            // overload signatures. So parameter initializers are transitively disallowed in
+            // ambient contexts.
+            return addJSDocComment(finishNode(node));
+        }
+        function parseBindingElementInitializer(inParameter) {
+            return inParameter ? parseParameterInitializer() : parseNonParameterInitializer();
+        }
+        function parseParameterInitializer() {
+            return parseInitializer(/*inParameter*/ true);
+        }
+        function fillSignature(returnToken, yieldContext, awaitContext, requireCompleteParameterList, signature) {
+            var returnTokenRequired = returnToken === 36 /* EqualsGreaterThanToken */;
+            signature.typeParameters = parseTypeParameters();
+            signature.parameters = parseParameterList(yieldContext, awaitContext, requireCompleteParameterList);
+            if (returnTokenRequired) {
+                parseExpected(returnToken);
+                signature.type = parseTypeOrTypePredicate();
+            }
+            else if (parseOptional(returnToken)) {
+                signature.type = parseTypeOrTypePredicate();
+            }
+        }
+        function parseParameterList(yieldContext, awaitContext, requireCompleteParameterList) {
+            // FormalParameters [Yield,Await]: (modified)
+            //      [empty]
+            //      FormalParameterList[?Yield,Await]
+            //
+            // FormalParameter[Yield,Await]: (modified)
+            //      BindingElement[?Yield,Await]
+            //
+            // BindingElement [Yield,Await]: (modified)
+            //      SingleNameBinding[?Yield,?Await]
+            //      BindingPattern[?Yield,?Await]Initializer [In, ?Yield,?Await] opt
+            //
+            // SingleNameBinding [Yield,Await]:
+            //      BindingIdentifier[?Yield,?Await]Initializer [In, ?Yield,?Await] opt
+            if (parseExpected(19 /* OpenParenToken */)) {
+                var savedYieldContext = inYieldContext();
+                var savedAwaitContext = inAwaitContext();
+                setYieldContext(yieldContext);
+                setAwaitContext(awaitContext);
+                var result = parseDelimitedList(16 /* Parameters */, parseParameter);
+                setYieldContext(savedYieldContext);
+                setAwaitContext(savedAwaitContext);
+                if (!parseExpected(20 /* CloseParenToken */) && requireCompleteParameterList) {
+                    // Caller insisted that we had to end with a )   We didn't.  So just return
+                    // undefined here.
+                    return undefined;
                 }
-                tokenValue += text.substr(firstCharPosition, pos - firstCharPosition);
+                return result;
             }
-            return token;
+            // We didn't even have an open paren.  If the caller requires a complete parameter list,
+            // we definitely can't provide that.  However, if they're ok with an incomplete one,
+            // then just return an empty set of parameters.
+            return requireCompleteParameterList ? undefined : createMissingList();
         }
-        function scanJsxAttributeValue() {
-            startPos = pos;
-            switch (text.charCodeAt(pos)) {
-                case 34 /* doubleQuote */:
-                case 39 /* singleQuote */:
-                    tokenValue = scanString(/*allowEscapes*/ false);
-                    return token = 9 /* StringLiteral */;
-                default:
-                    // If this scans anything other than `{`, it's a parse error.
-                    return scan();
+        function parseTypeMemberSemicolon() {
+            // We allow type members to be separated by commas or (possibly ASI) semicolons.
+            // First check if it was a comma.  If so, we're done with the member.
+            if (parseOptional(26 /* CommaToken */)) {
+                return;
             }
+            // Didn't have a comma.  We must have a (possible ASI) semicolon.
+            parseSemicolon();
         }
-        function scanJSDocToken() {
-            if (pos >= end) {
-                return token = 1 /* EndOfFileToken */;
+        function parseSignatureMember(kind) {
+            var node = createNode(kind);
+            if (kind === 156 /* ConstructSignature */) {
+                parseExpected(94 /* NewKeyword */);
             }
-            startPos = pos;
-            tokenPos = pos;
-            var ch = text.charCodeAt(pos);
-            switch (ch) {
-                case 9 /* tab */:
-                case 11 /* verticalTab */:
-                case 12 /* formFeed */:
-                case 32 /* space */:
-                    while (pos < end && isWhiteSpaceSingleLine(text.charCodeAt(pos))) {
-                        pos++;
-                    }
-                    return token = 5 /* WhitespaceTrivia */;
-                case 64 /* at */:
-                    pos++;
-                    return token = 55 /* AtToken */;
-                case 10 /* lineFeed */:
-                case 13 /* carriageReturn */:
-                    pos++;
-                    return token = 4 /* NewLineTrivia */;
-                case 42 /* asterisk */:
-                    pos++;
-                    return token = 37 /* AsteriskToken */;
-                case 123 /* openBrace */:
-                    pos++;
-                    return token = 15 /* OpenBraceToken */;
-                case 125 /* closeBrace */:
-                    pos++;
-                    return token = 16 /* CloseBraceToken */;
-                case 91 /* openBracket */:
-                    pos++;
-                    return token = 19 /* OpenBracketToken */;
-                case 93 /* closeBracket */:
-                    pos++;
-                    return token = 20 /* CloseBracketToken */;
-                case 61 /* equals */:
-                    pos++;
-                    return token = 56 /* EqualsToken */;
-                case 44 /* comma */:
-                    pos++;
-                    return token = 24 /* CommaToken */;
+            fillSignature(56 /* ColonToken */, /*yieldContext*/ false, /*awaitContext*/ false, /*requireCompleteParameterList*/ false, node);
+            parseTypeMemberSemicolon();
+            return addJSDocComment(finishNode(node));
+        }
+        function isIndexSignature() {
+            if (token() !== 21 /* OpenBracketToken */) {
+                return false;
             }
-            if (isIdentifierStart(ch, 2 /* Latest */)) {
-                pos++;
-                while (isIdentifierPart(text.charCodeAt(pos), 2 /* Latest */) && pos < end) {
-                    pos++;
+            return lookAhead(isUnambiguouslyIndexSignature);
+        }
+        function isUnambiguouslyIndexSignature() {
+            // The only allowed sequence is:
+            //
+            //   [id:
+            //
+            // However, for error recovery, we also check the following cases:
+            //
+            //   [...
+            //   [id,
+            //   [id?,
+            //   [id?:
+            //   [id?]
+            //   [public id
+            //   [private id
+            //   [protected id
+            //   []
+            //
+            nextToken();
+            if (token() === 24 /* DotDotDotToken */ || token() === 22 /* CloseBracketToken */) {
+                return true;
+            }
+            if (ts.isModifierKind(token())) {
+                nextToken();
+                if (isIdentifier()) {
+                    return true;
                 }
-                return token = 69 /* Identifier */;
+            }
+            else if (!isIdentifier()) {
+                return false;
             }
             else {
-                return pos += 1, token = 0 /* Unknown */;
+                // Skip the identifier
+                nextToken();
+            }
+            // A colon signifies a well formed indexer
+            // A comma should be a badly formed indexer because comma expressions are not allowed
+            // in computed properties.
+            if (token() === 56 /* ColonToken */ || token() === 26 /* CommaToken */) {
+                return true;
             }
+            // Question mark could be an indexer with an optional property,
+            // or it could be a conditional expression in a computed property.
+            if (token() !== 55 /* QuestionToken */) {
+                return false;
+            }
+            // If any of the following tokens are after the question mark, it cannot
+            // be a conditional expression, so treat it as an indexer.
+            nextToken();
+            return token() === 56 /* ColonToken */ || token() === 26 /* CommaToken */ || token() === 22 /* CloseBracketToken */;
         }
-        function speculationHelper(callback, isLookahead) {
-            var savePos = pos;
-            var saveStartPos = startPos;
-            var saveTokenPos = tokenPos;
-            var saveToken = token;
-            var saveTokenValue = tokenValue;
-            var savePrecedingLineBreak = precedingLineBreak;
-            var result = callback();
-            // If our callback returned something 'falsy' or we're just looking ahead,
-            // then unconditionally restore us to where we were.
-            if (!result || isLookahead) {
-                pos = savePos;
-                startPos = saveStartPos;
-                tokenPos = saveTokenPos;
-                token = saveToken;
-                tokenValue = saveTokenValue;
-                precedingLineBreak = savePrecedingLineBreak;
+        function parseIndexSignatureDeclaration(fullStart, decorators, modifiers) {
+            var node = createNode(157 /* IndexSignature */, fullStart);
+            node.decorators = decorators;
+            node.modifiers = modifiers;
+            node.parameters = parseBracketedList(16 /* Parameters */, parseParameter, 21 /* OpenBracketToken */, 22 /* CloseBracketToken */);
+            node.type = parseTypeAnnotation();
+            parseTypeMemberSemicolon();
+            return finishNode(node);
+        }
+        function parsePropertyOrMethodSignature(fullStart, modifiers) {
+            var name = parsePropertyName();
+            var questionToken = parseOptionalToken(55 /* QuestionToken */);
+            if (token() === 19 /* OpenParenToken */ || token() === 27 /* LessThanToken */) {
+                var method = createNode(150 /* MethodSignature */, fullStart);
+                method.modifiers = modifiers;
+                method.name = name;
+                method.questionToken = questionToken;
+                // Method signatures don't exist in expression contexts.  So they have neither
+                // [Yield] nor [Await]
+                fillSignature(56 /* ColonToken */, /*yieldContext*/ false, /*awaitContext*/ false, /*requireCompleteParameterList*/ false, method);
+                parseTypeMemberSemicolon();
+                return addJSDocComment(finishNode(method));
+            }
+            else {
+                var property = createNode(148 /* PropertySignature */, fullStart);
+                property.modifiers = modifiers;
+                property.name = name;
+                property.questionToken = questionToken;
+                property.type = parseTypeAnnotation();
+                if (token() === 58 /* EqualsToken */) {
+                    // Although type literal properties cannot not have initializers, we attempt
+                    // to parse an initializer so we can report in the checker that an interface
+                    // property or type literal property cannot have an initializer.
+                    property.initializer = parseNonParameterInitializer();
+                }
+                parseTypeMemberSemicolon();
+                return addJSDocComment(finishNode(property));
+            }
+        }
+        function isTypeMemberStart() {
+            // Return true if we have the start of a signature member
+            if (token() === 19 /* OpenParenToken */ || token() === 27 /* LessThanToken */) {
+                return true;
+            }
+            var idToken;
+            // Eat up all modifiers, but hold on to the last one in case it is actually an identifier
+            while (ts.isModifierKind(token())) {
+                idToken = true;
+                nextToken();
+            }
+            // Index signatures and computed property names are type members
+            if (token() === 21 /* OpenBracketToken */) {
+                return true;
+            }
+            // Try to get the first property-like token following all modifiers
+            if (isLiteralPropertyName()) {
+                idToken = true;
+                nextToken();
+            }
+            // If we were able to get any potential identifier, check that it is
+            // the start of a member declaration
+            if (idToken) {
+                return token() === 19 /* OpenParenToken */ ||
+                    token() === 27 /* LessThanToken */ ||
+                    token() === 55 /* QuestionToken */ ||
+                    token() === 56 /* ColonToken */ ||
+                    token() === 26 /* CommaToken */ ||
+                    canParseSemicolon();
+            }
+            return false;
+        }
+        function parseTypeMember() {
+            if (token() === 19 /* OpenParenToken */ || token() === 27 /* LessThanToken */) {
+                return parseSignatureMember(155 /* CallSignature */);
+            }
+            if (token() === 94 /* NewKeyword */ && lookAhead(nextTokenIsOpenParenOrLessThan)) {
+                return parseSignatureMember(156 /* ConstructSignature */);
+            }
+            var fullStart = getNodePos();
+            var modifiers = parseModifiers();
+            if (isIndexSignature()) {
+                return parseIndexSignatureDeclaration(fullStart, /*decorators*/ undefined, modifiers);
+            }
+            return parsePropertyOrMethodSignature(fullStart, modifiers);
+        }
+        function nextTokenIsOpenParenOrLessThan() {
+            nextToken();
+            return token() === 19 /* OpenParenToken */ || token() === 27 /* LessThanToken */;
+        }
+        function parseTypeLiteral() {
+            var node = createNode(163 /* TypeLiteral */);
+            node.members = parseObjectTypeMembers();
+            return finishNode(node);
+        }
+        function parseObjectTypeMembers() {
+            var members;
+            if (parseExpected(17 /* OpenBraceToken */)) {
+                members = parseList(4 /* TypeMembers */, parseTypeMember);
+                parseExpected(18 /* CloseBraceToken */);
+            }
+            else {
+                members = createMissingList();
+            }
+            return members;
+        }
+        function isStartOfMappedType() {
+            nextToken();
+            if (token() === 131 /* ReadonlyKeyword */) {
+                nextToken();
             }
-            return result;
+            return token() === 21 /* OpenBracketToken */ && nextTokenIsIdentifier() && nextToken() === 92 /* InKeyword */;
         }
-        function scanRange(start, length, callback) {
-            var saveEnd = end;
-            var savePos = pos;
-            var saveStartPos = startPos;
-            var saveTokenPos = tokenPos;
-            var saveToken = token;
-            var savePrecedingLineBreak = precedingLineBreak;
-            var saveTokenValue = tokenValue;
-            var saveHasExtendedUnicodeEscape = hasExtendedUnicodeEscape;
-            var saveTokenIsUnterminated = tokenIsUnterminated;
-            setText(text, start, length);
-            var result = callback();
-            end = saveEnd;
-            pos = savePos;
-            startPos = saveStartPos;
-            tokenPos = saveTokenPos;
-            token = saveToken;
-            precedingLineBreak = savePrecedingLineBreak;
-            tokenValue = saveTokenValue;
-            hasExtendedUnicodeEscape = saveHasExtendedUnicodeEscape;
-            tokenIsUnterminated = saveTokenIsUnterminated;
-            return result;
+        function parseMappedTypeParameter() {
+            var node = createNode(145 /* TypeParameter */);
+            node.name = parseIdentifier();
+            parseExpected(92 /* InKeyword */);
+            node.constraint = parseType();
+            return finishNode(node);
         }
-        function lookAhead(callback) {
-            return speculationHelper(callback, /*isLookahead*/ true);
+        function parseMappedType() {
+            var node = createNode(172 /* MappedType */);
+            parseExpected(17 /* OpenBraceToken */);
+            node.readonlyToken = parseOptionalToken(131 /* ReadonlyKeyword */);
+            parseExpected(21 /* OpenBracketToken */);
+            node.typeParameter = parseMappedTypeParameter();
+            parseExpected(22 /* CloseBracketToken */);
+            node.questionToken = parseOptionalToken(55 /* QuestionToken */);
+            node.type = parseTypeAnnotation();
+            parseSemicolon();
+            parseExpected(18 /* CloseBraceToken */);
+            return finishNode(node);
         }
-        function tryScan(callback) {
-            return speculationHelper(callback, /*isLookahead*/ false);
+        function parseTupleType() {
+            var node = createNode(165 /* TupleType */);
+            node.elementTypes = parseBracketedList(20 /* TupleElementTypes */, parseType, 21 /* OpenBracketToken */, 22 /* CloseBracketToken */);
+            return finishNode(node);
         }
-        function getText() {
-            return text;
+        function parseParenthesizedType() {
+            var node = createNode(168 /* ParenthesizedType */);
+            parseExpected(19 /* OpenParenToken */);
+            node.type = parseType();
+            parseExpected(20 /* CloseParenToken */);
+            return finishNode(node);
         }
-        function setText(newText, start, length) {
-            text = newText || "";
-            end = length === undefined ? text.length : start + length;
-            setTextPos(start || 0);
+        function parseFunctionOrConstructorType(kind) {
+            var node = createNode(kind);
+            if (kind === 161 /* ConstructorType */) {
+                parseExpected(94 /* NewKeyword */);
+            }
+            fillSignature(36 /* EqualsGreaterThanToken */, /*yieldContext*/ false, /*awaitContext*/ false, /*requireCompleteParameterList*/ false, node);
+            return finishNode(node);
         }
-        function setOnError(errorCallback) {
-            onError = errorCallback;
+        function parseKeywordAndNoDot() {
+            var node = parseTokenNode();
+            return token() === 23 /* DotToken */ ? undefined : node;
         }
-        function setScriptTarget(scriptTarget) {
-            languageVersion = scriptTarget;
+        function parseLiteralTypeNode() {
+            var node = createNode(173 /* LiteralType */);
+            node.literal = parseSimpleUnaryExpression();
+            finishNode(node);
+            return node;
         }
-        function setLanguageVariant(variant) {
-            languageVariant = variant;
+        function nextTokenIsNumericLiteral() {
+            return nextToken() === 8 /* NumericLiteral */;
         }
-        function setTextPos(textPos) {
-            ts.Debug.assert(textPos >= 0);
-            pos = textPos;
-            startPos = textPos;
-            tokenPos = textPos;
-            token = 0 /* Unknown */;
-            precedingLineBreak = false;
-            tokenValue = undefined;
-            hasExtendedUnicodeEscape = false;
-            tokenIsUnterminated = false;
+        function parseNonArrayType() {
+            switch (token()) {
+                case 119 /* AnyKeyword */:
+                case 136 /* StringKeyword */:
+                case 133 /* NumberKeyword */:
+                case 122 /* BooleanKeyword */:
+                case 137 /* SymbolKeyword */:
+                case 139 /* UndefinedKeyword */:
+                case 130 /* NeverKeyword */:
+                case 134 /* ObjectKeyword */:
+                    // If these are followed by a dot, then parse these out as a dotted type reference instead.
+                    var node = tryParse(parseKeywordAndNoDot);
+                    return node || parseTypeReference();
+                case 9 /* StringLiteral */:
+                case 8 /* NumericLiteral */:
+                case 101 /* TrueKeyword */:
+                case 86 /* FalseKeyword */:
+                    return parseLiteralTypeNode();
+                case 38 /* MinusToken */:
+                    return lookAhead(nextTokenIsNumericLiteral) ? parseLiteralTypeNode() : parseTypeReference();
+                case 105 /* VoidKeyword */:
+                case 95 /* NullKeyword */:
+                    return parseTokenNode();
+                case 99 /* ThisKeyword */: {
+                    var thisKeyword = parseThisTypeNode();
+                    if (token() === 126 /* IsKeyword */ && !scanner.hasPrecedingLineBreak()) {
+                        return parseThisTypePredicate(thisKeyword);
+                    }
+                    else {
+                        return thisKeyword;
+                    }
+                }
+                case 103 /* TypeOfKeyword */:
+                    return parseTypeQuery();
+                case 17 /* OpenBraceToken */:
+                    return lookAhead(isStartOfMappedType) ? parseMappedType() : parseTypeLiteral();
+                case 21 /* OpenBracketToken */:
+                    return parseTupleType();
+                case 19 /* OpenParenToken */:
+                    return parseParenthesizedType();
+                default:
+                    return parseTypeReference();
+            }
         }
-    }
-    ts.createScanner = createScanner;
-})(ts || (ts = {}));
-/// <reference path="core.ts"/>
-/// <reference path="utilities.ts"/>
-/* @internal */
-var ts;
-(function (ts) {
-    var NodeConstructor;
-    var SourceFileConstructor;
-    function createNode(kind, location, flags) {
-        var ConstructorForKind = kind === 256 /* SourceFile */
-            ? (SourceFileConstructor || (SourceFileConstructor = ts.objectAllocator.getSourceFileConstructor()))
-            : (NodeConstructor || (NodeConstructor = ts.objectAllocator.getNodeConstructor()));
-        var node = location
-            ? new ConstructorForKind(kind, location.pos, location.end)
-            : new ConstructorForKind(kind, /*pos*/ -1, /*end*/ -1);
-        node.flags = flags | 8 /* Synthesized */;
-        return node;
-    }
-    function updateNode(updated, original) {
-        if (updated !== original) {
-            setOriginalNode(updated, original);
-            if (original.startsOnNewLine) {
-                updated.startsOnNewLine = true;
+        function isStartOfType() {
+            switch (token()) {
+                case 119 /* AnyKeyword */:
+                case 136 /* StringKeyword */:
+                case 133 /* NumberKeyword */:
+                case 122 /* BooleanKeyword */:
+                case 137 /* SymbolKeyword */:
+                case 105 /* VoidKeyword */:
+                case 139 /* UndefinedKeyword */:
+                case 95 /* NullKeyword */:
+                case 99 /* ThisKeyword */:
+                case 103 /* TypeOfKeyword */:
+                case 130 /* NeverKeyword */:
+                case 17 /* OpenBraceToken */:
+                case 21 /* OpenBracketToken */:
+                case 27 /* LessThanToken */:
+                case 49 /* BarToken */:
+                case 48 /* AmpersandToken */:
+                case 94 /* NewKeyword */:
+                case 9 /* StringLiteral */:
+                case 8 /* NumericLiteral */:
+                case 101 /* TrueKeyword */:
+                case 86 /* FalseKeyword */:
+                case 134 /* ObjectKeyword */:
+                    return true;
+                case 38 /* MinusToken */:
+                    return lookAhead(nextTokenIsNumericLiteral);
+                case 19 /* OpenParenToken */:
+                    // Only consider '(' the start of a type if followed by ')', '...', an identifier, a modifier,
+                    // or something that starts a type. We don't want to consider things like '(1)' a type.
+                    return lookAhead(isStartOfParenthesizedOrFunctionType);
+                default:
+                    return isIdentifier();
             }
-            ts.aggregateTransformFlags(updated);
         }
-        return updated;
-    }
-    ts.updateNode = updateNode;
-    function createNodeArray(elements, location, hasTrailingComma) {
-        if (elements) {
-            if (ts.isNodeArray(elements)) {
-                return elements;
+        function isStartOfParenthesizedOrFunctionType() {
+            nextToken();
+            return token() === 20 /* CloseParenToken */ || isStartOfParameter() || isStartOfType();
+        }
+        function parseArrayTypeOrHigher() {
+            var type = parseNonArrayType();
+            while (!scanner.hasPrecedingLineBreak() && parseOptional(21 /* OpenBracketToken */)) {
+                if (isStartOfType()) {
+                    var node = createNode(171 /* IndexedAccessType */, type.pos);
+                    node.objectType = type;
+                    node.indexType = parseType();
+                    parseExpected(22 /* CloseBracketToken */);
+                    type = finishNode(node);
+                }
+                else {
+                    var node = createNode(164 /* ArrayType */, type.pos);
+                    node.elementType = type;
+                    parseExpected(22 /* CloseBracketToken */);
+                    type = finishNode(node);
+                }
             }
+            return type;
         }
-        else {
-            elements = [];
+        function parseTypeOperator(operator) {
+            var node = createNode(170 /* TypeOperator */);
+            parseExpected(operator);
+            node.operator = operator;
+            node.type = parseTypeOperatorOrHigher();
+            return finishNode(node);
         }
-        var array = elements;
-        if (location) {
-            array.pos = location.pos;
-            array.end = location.end;
+        function parseTypeOperatorOrHigher() {
+            switch (token()) {
+                case 127 /* KeyOfKeyword */:
+                    return parseTypeOperator(127 /* KeyOfKeyword */);
+            }
+            return parseArrayTypeOrHigher();
         }
-        else {
-            array.pos = -1;
-            array.end = -1;
+        function parseUnionOrIntersectionType(kind, parseConstituentType, operator) {
+            parseOptional(operator);
+            var type = parseConstituentType();
+            if (token() === operator) {
+                var types = createNodeArray([type], type.pos);
+                while (parseOptional(operator)) {
+                    types.push(parseConstituentType());
+                }
+                types.end = getNodeEnd();
+                var node = createNode(kind, type.pos);
+                node.types = types;
+                type = finishNode(node);
+            }
+            return type;
         }
-        if (hasTrailingComma) {
-            array.hasTrailingComma = true;
+        function parseIntersectionTypeOrHigher() {
+            return parseUnionOrIntersectionType(167 /* IntersectionType */, parseTypeOperatorOrHigher, 48 /* AmpersandToken */);
         }
-        return array;
-    }
-    ts.createNodeArray = createNodeArray;
-    function createSynthesizedNode(kind, startsOnNewLine) {
-        var node = createNode(kind, /*location*/ undefined);
-        node.startsOnNewLine = startsOnNewLine;
-        return node;
-    }
-    ts.createSynthesizedNode = createSynthesizedNode;
-    function createSynthesizedNodeArray(elements) {
-        return createNodeArray(elements, /*location*/ undefined);
-    }
-    ts.createSynthesizedNodeArray = createSynthesizedNodeArray;
-    /**
-     * Creates a shallow, memberwise clone of a node with no source map location.
-     */
-    function getSynthesizedClone(node) {
-        // We don't use "clone" from core.ts here, as we need to preserve the prototype chain of
-        // the original node. We also need to exclude specific properties and only include own-
-        // properties (to skip members already defined on the shared prototype).
-        var clone = createNode(node.kind, /*location*/ undefined, node.flags);
-        setOriginalNode(clone, node);
-        for (var key in node) {
-            if (clone.hasOwnProperty(key) || !node.hasOwnProperty(key)) {
-                continue;
+        function parseUnionTypeOrHigher() {
+            return parseUnionOrIntersectionType(166 /* UnionType */, parseIntersectionTypeOrHigher, 49 /* BarToken */);
+        }
+        function isStartOfFunctionType() {
+            if (token() === 27 /* LessThanToken */) {
+                return true;
             }
-            clone[key] = node[key];
+            return token() === 19 /* OpenParenToken */ && lookAhead(isUnambiguouslyStartOfFunctionType);
         }
-        return clone;
-    }
-    ts.getSynthesizedClone = getSynthesizedClone;
-    /**
-     * Creates a shallow, memberwise clone of a node for mutation.
-     */
-    function getMutableClone(node) {
-        var clone = getSynthesizedClone(node);
-        clone.pos = node.pos;
-        clone.end = node.end;
-        clone.parent = node.parent;
-        return clone;
-    }
-    ts.getMutableClone = getMutableClone;
-    function createLiteral(value, location) {
-        if (typeof value === "number") {
-            var node = createNode(8 /* NumericLiteral */, location, /*flags*/ undefined);
-            node.text = value.toString();
-            return node;
+        function skipParameterStart() {
+            if (ts.isModifierKind(token())) {
+                // Skip modifiers
+                parseModifiers();
+            }
+            if (isIdentifier() || token() === 99 /* ThisKeyword */) {
+                nextToken();
+                return true;
+            }
+            if (token() === 21 /* OpenBracketToken */ || token() === 17 /* OpenBraceToken */) {
+                // Return true if we can parse an array or object binding pattern with no errors
+                var previousErrorCount = parseDiagnostics.length;
+                parseIdentifierOrPattern();
+                return previousErrorCount === parseDiagnostics.length;
+            }
+            return false;
         }
-        else if (typeof value === "boolean") {
-            return createNode(value ? 99 /* TrueKeyword */ : 84 /* FalseKeyword */, location, /*flags*/ undefined);
+        function isUnambiguouslyStartOfFunctionType() {
+            nextToken();
+            if (token() === 20 /* CloseParenToken */ || token() === 24 /* DotDotDotToken */) {
+                // ( )
+                // ( ...
+                return true;
+            }
+            if (skipParameterStart()) {
+                // We successfully skipped modifiers (if any) and an identifier or binding pattern,
+                // now see if we have something that indicates a parameter declaration
+                if (token() === 56 /* ColonToken */ || token() === 26 /* CommaToken */ ||
+                    token() === 55 /* QuestionToken */ || token() === 58 /* EqualsToken */) {
+                    // ( xxx :
+                    // ( xxx ,
+                    // ( xxx ?
+                    // ( xxx =
+                    return true;
+                }
+                if (token() === 20 /* CloseParenToken */) {
+                    nextToken();
+                    if (token() === 36 /* EqualsGreaterThanToken */) {
+                        // ( xxx ) =>
+                        return true;
+                    }
+                }
+            }
+            return false;
         }
-        else if (typeof value === "string") {
-            var node = createNode(9 /* StringLiteral */, location, /*flags*/ undefined);
-            node.text = value;
-            return node;
+        function parseTypeOrTypePredicate() {
+            var typePredicateVariable = isIdentifier() && tryParse(parseTypePredicatePrefix);
+            var type = parseType();
+            if (typePredicateVariable) {
+                var node = createNode(158 /* TypePredicate */, typePredicateVariable.pos);
+                node.parameterName = typePredicateVariable;
+                node.type = type;
+                return finishNode(node);
+            }
+            else {
+                return type;
+            }
         }
-        else {
-            var node = createNode(9 /* StringLiteral */, location, /*flags*/ undefined);
-            node.textSourceNode = value;
-            node.text = value.text;
-            return node;
+        function parseTypePredicatePrefix() {
+            var id = parseIdentifier();
+            if (token() === 126 /* IsKeyword */ && !scanner.hasPrecedingLineBreak()) {
+                nextToken();
+                return id;
+            }
         }
-    }
-    ts.createLiteral = createLiteral;
-    // Identifiers
-    var nextAutoGenerateId = 0;
-    function createIdentifier(text, location) {
-        var node = createNode(69 /* Identifier */, location);
-        node.text = ts.escapeIdentifier(text);
-        node.originalKeywordKind = ts.stringToToken(text);
-        node.autoGenerateKind = 0 /* None */;
-        node.autoGenerateId = 0;
-        return node;
-    }
-    ts.createIdentifier = createIdentifier;
-    function createTempVariable(recordTempVariable, location) {
-        var name = createNode(69 /* Identifier */, location);
-        name.text = "";
-        name.originalKeywordKind = 0 /* Unknown */;
-        name.autoGenerateKind = 1 /* Auto */;
-        name.autoGenerateId = nextAutoGenerateId;
-        nextAutoGenerateId++;
-        if (recordTempVariable) {
-            recordTempVariable(name);
+        function parseType() {
+            // The rules about 'yield' only apply to actual code/expression contexts.  They don't
+            // apply to 'type' contexts.  So we disable these parameters here before moving on.
+            return doOutsideOfContext(20480 /* TypeExcludesFlags */, parseTypeWorker);
         }
-        return name;
-    }
-    ts.createTempVariable = createTempVariable;
-    function createLoopVariable(location) {
-        var name = createNode(69 /* Identifier */, location);
-        name.text = "";
-        name.originalKeywordKind = 0 /* Unknown */;
-        name.autoGenerateKind = 2 /* Loop */;
-        name.autoGenerateId = nextAutoGenerateId;
-        nextAutoGenerateId++;
-        return name;
-    }
-    ts.createLoopVariable = createLoopVariable;
-    function createUniqueName(text, location) {
-        var name = createNode(69 /* Identifier */, location);
-        name.text = text;
-        name.originalKeywordKind = 0 /* Unknown */;
-        name.autoGenerateKind = 3 /* Unique */;
-        name.autoGenerateId = nextAutoGenerateId;
-        nextAutoGenerateId++;
-        return name;
-    }
-    ts.createUniqueName = createUniqueName;
-    function getGeneratedNameForNode(node, location) {
-        var name = createNode(69 /* Identifier */, location);
-        name.original = node;
-        name.text = "";
-        name.originalKeywordKind = 0 /* Unknown */;
-        name.autoGenerateKind = 4 /* Node */;
-        name.autoGenerateId = nextAutoGenerateId;
-        nextAutoGenerateId++;
-        return name;
-    }
-    ts.getGeneratedNameForNode = getGeneratedNameForNode;
-    // Punctuation
-    function createToken(token) {
-        return createNode(token);
-    }
-    ts.createToken = createToken;
-    // Reserved words
-    function createSuper() {
-        var node = createNode(95 /* SuperKeyword */);
-        return node;
-    }
-    ts.createSuper = createSuper;
-    function createThis(location) {
-        var node = createNode(97 /* ThisKeyword */, location);
-        return node;
-    }
-    ts.createThis = createThis;
-    function createNull() {
-        var node = createNode(93 /* NullKeyword */);
-        return node;
-    }
-    ts.createNull = createNull;
-    // Names
-    function createComputedPropertyName(expression, location) {
-        var node = createNode(140 /* ComputedPropertyName */, location);
-        node.expression = expression;
-        return node;
-    }
-    ts.createComputedPropertyName = createComputedPropertyName;
-    function updateComputedPropertyName(node, expression) {
-        if (node.expression !== expression) {
-            return updateNode(createComputedPropertyName(expression, node), node);
+        function parseTypeWorker() {
+            if (isStartOfFunctionType()) {
+                return parseFunctionOrConstructorType(160 /* FunctionType */);
+            }
+            if (token() === 94 /* NewKeyword */) {
+                return parseFunctionOrConstructorType(161 /* ConstructorType */);
+            }
+            return parseUnionTypeOrHigher();
         }
-        return node;
-    }
-    ts.updateComputedPropertyName = updateComputedPropertyName;
-    // Signature elements
-    function createParameter(name, initializer, location) {
-        return createParameterDeclaration(
-        /*decorators*/ undefined, 
-        /*modifiers*/ undefined, 
-        /*dotDotDotToken*/ undefined, name, 
-        /*questionToken*/ undefined, 
-        /*type*/ undefined, initializer, location);
-    }
-    ts.createParameter = createParameter;
-    function createParameterDeclaration(decorators, modifiers, dotDotDotToken, name, questionToken, type, initializer, location, flags) {
-        var node = createNode(142 /* Parameter */, location, flags);
-        node.decorators = decorators ? createNodeArray(decorators) : undefined;
-        node.modifiers = modifiers ? createNodeArray(modifiers) : undefined;
-        node.dotDotDotToken = dotDotDotToken;
-        node.name = typeof name === "string" ? createIdentifier(name) : name;
-        node.questionToken = questionToken;
-        node.type = type;
-        node.initializer = initializer ? parenthesizeExpressionForList(initializer) : undefined;
-        return node;
-    }
-    ts.createParameterDeclaration = createParameterDeclaration;
-    function updateParameterDeclaration(node, decorators, modifiers, name, type, initializer) {
-        if (node.decorators !== decorators || node.modifiers !== modifiers || node.name !== name || node.type !== type || node.initializer !== initializer) {
-            return updateNode(createParameterDeclaration(decorators, modifiers, node.dotDotDotToken, name, node.questionToken, type, initializer, /*location*/ node, /*flags*/ node.flags), node);
+        function parseTypeAnnotation() {
+            return parseOptional(56 /* ColonToken */) ? parseType() : undefined;
         }
-        return node;
-    }
-    ts.updateParameterDeclaration = updateParameterDeclaration;
-    // Type members
-    function createProperty(decorators, modifiers, name, questionToken, type, initializer, location) {
-        var node = createNode(145 /* PropertyDeclaration */, location);
-        node.decorators = decorators ? createNodeArray(decorators) : undefined;
-        node.modifiers = modifiers ? createNodeArray(modifiers) : undefined;
-        node.name = typeof name === "string" ? createIdentifier(name) : name;
-        node.questionToken = questionToken;
-        node.type = type;
-        node.initializer = initializer;
-        return node;
-    }
-    ts.createProperty = createProperty;
-    function updateProperty(node, decorators, modifiers, name, type, initializer) {
-        if (node.decorators !== decorators || node.modifiers !== modifiers || node.name !== name || node.type !== type || node.initializer !== initializer) {
-            return updateNode(createProperty(decorators, modifiers, name, node.questionToken, type, initializer, node), node);
+        // EXPRESSIONS
+        function isStartOfLeftHandSideExpression() {
+            switch (token()) {
+                case 99 /* ThisKeyword */:
+                case 97 /* SuperKeyword */:
+                case 95 /* NullKeyword */:
+                case 101 /* TrueKeyword */:
+                case 86 /* FalseKeyword */:
+                case 8 /* NumericLiteral */:
+                case 9 /* StringLiteral */:
+                case 13 /* NoSubstitutionTemplateLiteral */:
+                case 14 /* TemplateHead */:
+                case 19 /* OpenParenToken */:
+                case 21 /* OpenBracketToken */:
+                case 17 /* OpenBraceToken */:
+                case 89 /* FunctionKeyword */:
+                case 75 /* ClassKeyword */:
+                case 94 /* NewKeyword */:
+                case 41 /* SlashToken */:
+                case 63 /* SlashEqualsToken */:
+                case 71 /* Identifier */:
+                    return true;
+                case 91 /* ImportKeyword */:
+                    return lookAhead(nextTokenIsOpenParenOrLessThan);
+                default:
+                    return isIdentifier();
+            }
         }
-        return node;
-    }
-    ts.updateProperty = updateProperty;
-    function createMethod(decorators, modifiers, asteriskToken, name, typeParameters, parameters, type, body, location, flags) {
-        var node = createNode(147 /* MethodDeclaration */, location, flags);
-        node.decorators = decorators ? createNodeArray(decorators) : undefined;
-        node.modifiers = modifiers ? createNodeArray(modifiers) : undefined;
-        node.asteriskToken = asteriskToken;
-        node.name = typeof name === "string" ? createIdentifier(name) : name;
-        node.typeParameters = typeParameters ? createNodeArray(typeParameters) : undefined;
-        node.parameters = createNodeArray(parameters);
-        node.type = type;
-        node.body = body;
-        return node;
-    }
-    ts.createMethod = createMethod;
-    function updateMethod(node, decorators, modifiers, name, typeParameters, parameters, type, body) {
-        if (node.decorators !== decorators || node.modifiers !== modifiers || node.name !== name || node.typeParameters !== typeParameters || node.parameters !== parameters || node.type !== type || node.body !== body) {
-            return updateNode(createMethod(decorators, modifiers, node.asteriskToken, name, typeParameters, parameters, type, body, /*location*/ node, node.flags), node);
+        function isStartOfExpression() {
+            if (isStartOfLeftHandSideExpression()) {
+                return true;
+            }
+            switch (token()) {
+                case 37 /* PlusToken */:
+                case 38 /* MinusToken */:
+                case 52 /* TildeToken */:
+                case 51 /* ExclamationToken */:
+                case 80 /* DeleteKeyword */:
+                case 103 /* TypeOfKeyword */:
+                case 105 /* VoidKeyword */:
+                case 43 /* PlusPlusToken */:
+                case 44 /* MinusMinusToken */:
+                case 27 /* LessThanToken */:
+                case 121 /* AwaitKeyword */:
+                case 116 /* YieldKeyword */:
+                    // Yield/await always starts an expression.  Either it is an identifier (in which case
+                    // it is definitely an expression).  Or it's a keyword (either because we're in
+                    // a generator or async function, or in strict mode (or both)) and it started a yield or await expression.
+                    return true;
+                default:
+                    // Error tolerance.  If we see the start of some binary operator, we consider
+                    // that the start of an expression.  That way we'll parse out a missing identifier,
+                    // give a good message about an identifier being missing, and then consume the
+                    // rest of the binary expression.
+                    if (isBinaryOperator()) {
+                        return true;
+                    }
+                    return isIdentifier();
+            }
         }
-        return node;
-    }
-    ts.updateMethod = updateMethod;
-    function createConstructor(decorators, modifiers, parameters, body, location, flags) {
-        var node = createNode(148 /* Constructor */, location, flags);
-        node.decorators = decorators ? createNodeArray(decorators) : undefined;
-        node.modifiers = modifiers ? createNodeArray(modifiers) : undefined;
-        node.typeParameters = undefined;
-        node.parameters = createNodeArray(parameters);
-        node.type = undefined;
-        node.body = body;
-        return node;
-    }
-    ts.createConstructor = createConstructor;
-    function updateConstructor(node, decorators, modifiers, parameters, body) {
-        if (node.decorators !== decorators || node.modifiers !== modifiers || node.parameters !== parameters || node.body !== body) {
-            return updateNode(createConstructor(decorators, modifiers, parameters, body, /*location*/ node, node.flags), node);
+        function isStartOfExpressionStatement() {
+            // As per the grammar, none of '{' or 'function' or 'class' can start an expression statement.
+            return token() !== 17 /* OpenBraceToken */ &&
+                token() !== 89 /* FunctionKeyword */ &&
+                token() !== 75 /* ClassKeyword */ &&
+                token() !== 57 /* AtToken */ &&
+                isStartOfExpression();
         }
-        return node;
-    }
-    ts.updateConstructor = updateConstructor;
-    function createGetAccessor(decorators, modifiers, name, parameters, type, body, location, flags) {
-        var node = createNode(149 /* GetAccessor */, location, flags);
-        node.decorators = decorators ? createNodeArray(decorators) : undefined;
-        node.modifiers = modifiers ? createNodeArray(modifiers) : undefined;
-        node.name = typeof name === "string" ? createIdentifier(name) : name;
-        node.typeParameters = undefined;
-        node.parameters = createNodeArray(parameters);
-        node.type = type;
-        node.body = body;
-        return node;
-    }
-    ts.createGetAccessor = createGetAccessor;
-    function updateGetAccessor(node, decorators, modifiers, name, parameters, type, body) {
-        if (node.decorators !== decorators || node.modifiers !== modifiers || node.name !== name || node.parameters !== parameters || node.type !== type || node.body !== body) {
-            return updateNode(createGetAccessor(decorators, modifiers, name, parameters, type, body, /*location*/ node, node.flags), node);
+        function parseExpression() {
+            // Expression[in]:
+            //      AssignmentExpression[in]
+            //      Expression[in] , AssignmentExpression[in]
+            // clear the decorator context when parsing Expression, as it should be unambiguous when parsing a decorator
+            var saveDecoratorContext = inDecoratorContext();
+            if (saveDecoratorContext) {
+                setDecoratorContext(/*val*/ false);
+            }
+            var expr = parseAssignmentExpressionOrHigher();
+            var operatorToken;
+            while ((operatorToken = parseOptionalToken(26 /* CommaToken */))) {
+                expr = makeBinaryExpression(expr, operatorToken, parseAssignmentExpressionOrHigher());
+            }
+            if (saveDecoratorContext) {
+                setDecoratorContext(/*val*/ true);
+            }
+            return expr;
         }
-        return node;
-    }
-    ts.updateGetAccessor = updateGetAccessor;
-    function createSetAccessor(decorators, modifiers, name, parameters, body, location, flags) {
-        var node = createNode(150 /* SetAccessor */, location, flags);
-        node.decorators = decorators ? createNodeArray(decorators) : undefined;
-        node.modifiers = modifiers ? createNodeArray(modifiers) : undefined;
-        node.name = typeof name === "string" ? createIdentifier(name) : name;
-        node.typeParameters = undefined;
-        node.parameters = createNodeArray(parameters);
-        node.body = body;
-        return node;
-    }
-    ts.createSetAccessor = createSetAccessor;
-    function updateSetAccessor(node, decorators, modifiers, name, parameters, body) {
-        if (node.decorators !== decorators || node.modifiers !== modifiers || node.name !== name || node.parameters !== parameters || node.body !== body) {
-            return updateNode(createSetAccessor(decorators, modifiers, name, parameters, body, /*location*/ node, node.flags), node);
+        function parseInitializer(inParameter) {
+            if (token() !== 58 /* EqualsToken */) {
+                // It's not uncommon during typing for the user to miss writing the '=' token.  Check if
+                // there is no newline after the last token and if we're on an expression.  If so, parse
+                // this as an equals-value clause with a missing equals.
+                // NOTE: There are two places where we allow equals-value clauses.  The first is in a
+                // variable declarator.  The second is with a parameter.  For variable declarators
+                // it's more likely that a { would be a allowed (as an object literal).  While this
+                // is also allowed for parameters, the risk is that we consume the { as an object
+                // literal when it really will be for the block following the parameter.
+                if (scanner.hasPrecedingLineBreak() || (inParameter && token() === 17 /* OpenBraceToken */) || !isStartOfExpression()) {
+                    // preceding line break, open brace in a parameter (likely a function body) or current token is not an expression -
+                    // do not try to parse initializer
+                    return undefined;
+                }
+            }
+            // Initializer[In, Yield] :
+            //     = AssignmentExpression[?In, ?Yield]
+            parseExpected(58 /* EqualsToken */);
+            return parseAssignmentExpressionOrHigher();
+        }
+        function parseAssignmentExpressionOrHigher() {
+            //  AssignmentExpression[in,yield]:
+            //      1) ConditionalExpression[?in,?yield]
+            //      2) LeftHandSideExpression = AssignmentExpression[?in,?yield]
+            //      3) LeftHandSideExpression AssignmentOperator AssignmentExpression[?in,?yield]
+            //      4) ArrowFunctionExpression[?in,?yield]
+            //      5) AsyncArrowFunctionExpression[in,yield,await]
+            //      6) [+Yield] YieldExpression[?In]
+            //
+            // Note: for ease of implementation we treat productions '2' and '3' as the same thing.
+            // (i.e. they're both BinaryExpressions with an assignment operator in it).
+            // First, do the simple check if we have a YieldExpression (production '6').
+            if (isYieldExpression()) {
+                return parseYieldExpression();
+            }
+            // Then, check if we have an arrow function (production '4' and '5') that starts with a parenthesized
+            // parameter list or is an async arrow function.
+            // AsyncArrowFunctionExpression:
+            //      1) async[no LineTerminator here]AsyncArrowBindingIdentifier[?Yield][no LineTerminator here]=>AsyncConciseBody[?In]
+            //      2) CoverCallExpressionAndAsyncArrowHead[?Yield, ?Await][no LineTerminator here]=>AsyncConciseBody[?In]
+            // Production (1) of AsyncArrowFunctionExpression is parsed in "tryParseAsyncSimpleArrowFunctionExpression".
+            // And production (2) is parsed in "tryParseParenthesizedArrowFunctionExpression".
+            //
+            // If we do successfully parse arrow-function, we must *not* recurse for productions 1, 2 or 3. An ArrowFunction is
+            // not a  LeftHandSideExpression, nor does it start a ConditionalExpression.  So we are done
+            // with AssignmentExpression if we see one.
+            var arrowExpression = tryParseParenthesizedArrowFunctionExpression() || tryParseAsyncSimpleArrowFunctionExpression();
+            if (arrowExpression) {
+                return arrowExpression;
+            }
+            // Now try to see if we're in production '1', '2' or '3'.  A conditional expression can
+            // start with a LogicalOrExpression, while the assignment productions can only start with
+            // LeftHandSideExpressions.
+            //
+            // So, first, we try to just parse out a BinaryExpression.  If we get something that is a
+            // LeftHandSide or higher, then we can try to parse out the assignment expression part.
+            // Otherwise, we try to parse out the conditional expression bit.  We want to allow any
+            // binary expression here, so we pass in the 'lowest' precedence here so that it matches
+            // and consumes anything.
+            var expr = parseBinaryExpressionOrHigher(/*precedence*/ 0);
+            // To avoid a look-ahead, we did not handle the case of an arrow function with a single un-parenthesized
+            // parameter ('x => ...') above. We handle it here by checking if the parsed expression was a single
+            // identifier and the current token is an arrow.
+            if (expr.kind === 71 /* Identifier */ && token() === 36 /* EqualsGreaterThanToken */) {
+                return parseSimpleArrowFunctionExpression(expr);
+            }
+            // Now see if we might be in cases '2' or '3'.
+            // If the expression was a LHS expression, and we have an assignment operator, then
+            // we're in '2' or '3'. Consume the assignment and return.
+            //
+            // Note: we call reScanGreaterToken so that we get an appropriately merged token
+            // for cases like > > =  becoming >>=
+            if (ts.isLeftHandSideExpression(expr) && ts.isAssignmentOperator(reScanGreaterToken())) {
+                return makeBinaryExpression(expr, parseTokenNode(), parseAssignmentExpressionOrHigher());
+            }
+            // It wasn't an assignment or a lambda.  This is a conditional expression:
+            return parseConditionalExpressionRest(expr);
+        }
+        function isYieldExpression() {
+            if (token() === 116 /* YieldKeyword */) {
+                // If we have a 'yield' keyword, and this is a context where yield expressions are
+                // allowed, then definitely parse out a yield expression.
+                if (inYieldContext()) {
+                    return true;
+                }
+                // We're in a context where 'yield expr' is not allowed.  However, if we can
+                // definitely tell that the user was trying to parse a 'yield expr' and not
+                // just a normal expr that start with a 'yield' identifier, then parse out
+                // a 'yield expr'.  We can then report an error later that they are only
+                // allowed in generator expressions.
+                //
+                // for example, if we see 'yield(foo)', then we'll have to treat that as an
+                // invocation expression of something called 'yield'.  However, if we have
+                // 'yield foo' then that is not legal as a normal expression, so we can
+                // definitely recognize this as a yield expression.
+                //
+                // for now we just check if the next token is an identifier.  More heuristics
+                // can be added here later as necessary.  We just need to make sure that we
+                // don't accidentally consume something legal.
+                return lookAhead(nextTokenIsIdentifierOrKeywordOrLiteralOnSameLine);
+            }
+            return false;
         }
-        return node;
-    }
-    ts.updateSetAccessor = updateSetAccessor;
-    // Binding Patterns
-    function createObjectBindingPattern(elements, location) {
-        var node = createNode(167 /* ObjectBindingPattern */, location);
-        node.elements = createNodeArray(elements);
-        return node;
-    }
-    ts.createObjectBindingPattern = createObjectBindingPattern;
-    function updateObjectBindingPattern(node, elements) {
-        if (node.elements !== elements) {
-            return updateNode(createObjectBindingPattern(elements, node), node);
+        function nextTokenIsIdentifierOnSameLine() {
+            nextToken();
+            return !scanner.hasPrecedingLineBreak() && isIdentifier();
         }
-        return node;
-    }
-    ts.updateObjectBindingPattern = updateObjectBindingPattern;
-    function createArrayBindingPattern(elements, location) {
-        var node = createNode(168 /* ArrayBindingPattern */, location);
-        node.elements = createNodeArray(elements);
-        return node;
-    }
-    ts.createArrayBindingPattern = createArrayBindingPattern;
-    function updateArrayBindingPattern(node, elements) {
-        if (node.elements !== elements) {
-            return updateNode(createArrayBindingPattern(elements, node), node);
+        function parseYieldExpression() {
+            var node = createNode(197 /* YieldExpression */);
+            // YieldExpression[In] :
+            //      yield
+            //      yield [no LineTerminator here] [Lexical goal InputElementRegExp]AssignmentExpression[?In, Yield]
+            //      yield [no LineTerminator here] * [Lexical goal InputElementRegExp]AssignmentExpression[?In, Yield]
+            nextToken();
+            if (!scanner.hasPrecedingLineBreak() &&
+                (token() === 39 /* AsteriskToken */ || isStartOfExpression())) {
+                node.asteriskToken = parseOptionalToken(39 /* AsteriskToken */);
+                node.expression = parseAssignmentExpressionOrHigher();
+                return finishNode(node);
+            }
+            else {
+                // if the next token is not on the same line as yield.  or we don't have an '*' or
+                // the start of an expression, then this is just a simple "yield" expression.
+                return finishNode(node);
+            }
         }
-        return node;
-    }
-    ts.updateArrayBindingPattern = updateArrayBindingPattern;
-    function createBindingElement(propertyName, dotDotDotToken, name, initializer, location) {
-        var node = createNode(169 /* BindingElement */, location);
-        node.propertyName = typeof propertyName === "string" ? createIdentifier(propertyName) : propertyName;
-        node.dotDotDotToken = dotDotDotToken;
-        node.name = typeof name === "string" ? createIdentifier(name) : name;
-        node.initializer = initializer;
-        return node;
-    }
-    ts.createBindingElement = createBindingElement;
-    function updateBindingElement(node, propertyName, name, initializer) {
-        if (node.propertyName !== propertyName || node.name !== name || node.initializer !== initializer) {
-            return updateNode(createBindingElement(propertyName, node.dotDotDotToken, name, initializer, node), node);
+        function parseSimpleArrowFunctionExpression(identifier, asyncModifier) {
+            ts.Debug.assert(token() === 36 /* EqualsGreaterThanToken */, "parseSimpleArrowFunctionExpression should only have been called if we had a =>");
+            var node;
+            if (asyncModifier) {
+                node = createNode(187 /* ArrowFunction */, asyncModifier.pos);
+                node.modifiers = asyncModifier;
+            }
+            else {
+                node = createNode(187 /* ArrowFunction */, identifier.pos);
+            }
+            var parameter = createNode(146 /* Parameter */, identifier.pos);
+            parameter.name = identifier;
+            finishNode(parameter);
+            node.parameters = createNodeArray([parameter], parameter.pos);
+            node.parameters.end = parameter.end;
+            node.equalsGreaterThanToken = parseExpectedToken(36 /* EqualsGreaterThanToken */, /*reportAtCurrentPosition*/ false, ts.Diagnostics._0_expected, "=>");
+            node.body = parseArrowFunctionExpressionBody(/*isAsync*/ !!asyncModifier);
+            return addJSDocComment(finishNode(node));
         }
-        return node;
-    }
-    ts.updateBindingElement = updateBindingElement;
-    // Expression
-    function createArrayLiteral(elements, location, multiLine) {
-        var node = createNode(170 /* ArrayLiteralExpression */, location);
-        node.elements = parenthesizeListElements(createNodeArray(elements));
-        if (multiLine) {
-            node.multiLine = true;
+        function tryParseParenthesizedArrowFunctionExpression() {
+            var triState = isParenthesizedArrowFunctionExpression();
+            if (triState === 0 /* False */) {
+                // It's definitely not a parenthesized arrow function expression.
+                return undefined;
+            }
+            // If we definitely have an arrow function, then we can just parse one, not requiring a
+            // following => or { token. Otherwise, we *might* have an arrow function.  Try to parse
+            // it out, but don't allow any ambiguity, and return 'undefined' if this could be an
+            // expression instead.
+            var arrowFunction = triState === 1 /* True */
+                ? parseParenthesizedArrowFunctionExpressionHead(/*allowAmbiguity*/ true)
+                : tryParse(parsePossibleParenthesizedArrowFunctionExpressionHead);
+            if (!arrowFunction) {
+                // Didn't appear to actually be a parenthesized arrow function.  Just bail out.
+                return undefined;
+            }
+            var isAsync = !!(ts.getModifierFlags(arrowFunction) & 256 /* Async */);
+            // If we have an arrow, then try to parse the body. Even if not, try to parse if we
+            // have an opening brace, just in case we're in an error state.
+            var lastToken = token();
+            arrowFunction.equalsGreaterThanToken = parseExpectedToken(36 /* EqualsGreaterThanToken */, /*reportAtCurrentPosition*/ false, ts.Diagnostics._0_expected, "=>");
+            arrowFunction.body = (lastToken === 36 /* EqualsGreaterThanToken */ || lastToken === 17 /* OpenBraceToken */)
+                ? parseArrowFunctionExpressionBody(isAsync)
+                : parseIdentifier();
+            return addJSDocComment(finishNode(arrowFunction));
         }
-        return node;
-    }
-    ts.createArrayLiteral = createArrayLiteral;
-    function updateArrayLiteral(node, elements) {
-        if (node.elements !== elements) {
-            return updateNode(createArrayLiteral(elements, node, node.multiLine), node);
+        //  True        -> We definitely expect a parenthesized arrow function here.
+        //  False       -> There *cannot* be a parenthesized arrow function here.
+        //  Unknown     -> There *might* be a parenthesized arrow function here.
+        //                 Speculatively look ahead to be sure, and rollback if not.
+        function isParenthesizedArrowFunctionExpression() {
+            if (token() === 19 /* OpenParenToken */ || token() === 27 /* LessThanToken */ || token() === 120 /* AsyncKeyword */) {
+                return lookAhead(isParenthesizedArrowFunctionExpressionWorker);
+            }
+            if (token() === 36 /* EqualsGreaterThanToken */) {
+                // ERROR RECOVERY TWEAK:
+                // If we see a standalone => try to parse it as an arrow function expression as that's
+                // likely what the user intended to write.
+                return 1 /* True */;
+            }
+            // Definitely not a parenthesized arrow function.
+            return 0 /* False */;
         }
-        return node;
-    }
-    ts.updateArrayLiteral = updateArrayLiteral;
-    function createObjectLiteral(properties, location, multiLine) {
-        var node = createNode(171 /* ObjectLiteralExpression */, location);
-        node.properties = createNodeArray(properties);
-        if (multiLine) {
-            node.multiLine = true;
+        function isParenthesizedArrowFunctionExpressionWorker() {
+            if (token() === 120 /* AsyncKeyword */) {
+                nextToken();
+                if (scanner.hasPrecedingLineBreak()) {
+                    return 0 /* False */;
+                }
+                if (token() !== 19 /* OpenParenToken */ && token() !== 27 /* LessThanToken */) {
+                    return 0 /* False */;
+                }
+            }
+            var first = token();
+            var second = nextToken();
+            if (first === 19 /* OpenParenToken */) {
+                if (second === 20 /* CloseParenToken */) {
+                    // Simple cases: "() =>", "(): ", and  "() {".
+                    // This is an arrow function with no parameters.
+                    // The last one is not actually an arrow function,
+                    // but this is probably what the user intended.
+                    var third = nextToken();
+                    switch (third) {
+                        case 36 /* EqualsGreaterThanToken */:
+                        case 56 /* ColonToken */:
+                        case 17 /* OpenBraceToken */:
+                            return 1 /* True */;
+                        default:
+                            return 0 /* False */;
+                    }
+                }
+                // If encounter "([" or "({", this could be the start of a binding pattern.
+                // Examples:
+                //      ([ x ]) => { }
+                //      ({ x }) => { }
+                //      ([ x ])
+                //      ({ x })
+                if (second === 21 /* OpenBracketToken */ || second === 17 /* OpenBraceToken */) {
+                    return 2 /* Unknown */;
+                }
+                // Simple case: "(..."
+                // This is an arrow function with a rest parameter.
+                if (second === 24 /* DotDotDotToken */) {
+                    return 1 /* True */;
+                }
+                // If we had "(" followed by something that's not an identifier,
+                // then this definitely doesn't look like a lambda.
+                // Note: we could be a little more lenient and allow
+                // "(public" or "(private". These would not ever actually be allowed,
+                // but we could provide a good error message instead of bailing out.
+                if (!isIdentifier()) {
+                    return 0 /* False */;
+                }
+                // If we have something like "(a:", then we must have a
+                // type-annotated parameter in an arrow function expression.
+                if (nextToken() === 56 /* ColonToken */) {
+                    return 1 /* True */;
+                }
+                // This *could* be a parenthesized arrow function.
+                // Return Unknown to let the caller know.
+                return 2 /* Unknown */;
+            }
+            else {
+                ts.Debug.assert(first === 27 /* LessThanToken */);
+                // If we have "<" not followed by an identifier,
+                // then this definitely is not an arrow function.
+                if (!isIdentifier()) {
+                    return 0 /* False */;
+                }
+                // JSX overrides
+                if (sourceFile.languageVariant === 1 /* JSX */) {
+                    var isArrowFunctionInJsx = lookAhead(function () {
+                        var third = nextToken();
+                        if (third === 85 /* ExtendsKeyword */) {
+                            var fourth = nextToken();
+                            switch (fourth) {
+                                case 58 /* EqualsToken */:
+                                case 29 /* GreaterThanToken */:
+                                    return false;
+                                default:
+                                    return true;
+                            }
+                        }
+                        else if (third === 26 /* CommaToken */) {
+                            return true;
+                        }
+                        return false;
+                    });
+                    if (isArrowFunctionInJsx) {
+                        return 1 /* True */;
+                    }
+                    return 0 /* False */;
+                }
+                // This *could* be a parenthesized arrow function.
+                return 2 /* Unknown */;
+            }
         }
-        return node;
-    }
-    ts.createObjectLiteral = createObjectLiteral;
-    function updateObjectLiteral(node, properties) {
-        if (node.properties !== properties) {
-            return updateNode(createObjectLiteral(properties, node, node.multiLine), node);
+        function parsePossibleParenthesizedArrowFunctionExpressionHead() {
+            return parseParenthesizedArrowFunctionExpressionHead(/*allowAmbiguity*/ false);
         }
-        return node;
-    }
-    ts.updateObjectLiteral = updateObjectLiteral;
-    function createPropertyAccess(expression, name, location, flags) {
-        var node = createNode(172 /* PropertyAccessExpression */, location, flags);
-        node.expression = parenthesizeForAccess(expression);
-        (node.emitNode || (node.emitNode = {})).flags |= 1048576 /* NoIndentation */;
-        node.name = typeof name === "string" ? createIdentifier(name) : name;
-        return node;
-    }
-    ts.createPropertyAccess = createPropertyAccess;
-    function updatePropertyAccess(node, expression, name) {
-        if (node.expression !== expression || node.name !== name) {
-            var propertyAccess = createPropertyAccess(expression, name, /*location*/ node, node.flags);
-            // Because we are updating existed propertyAccess we want to inherit its emitFlags instead of using default from createPropertyAccess
-            (propertyAccess.emitNode || (propertyAccess.emitNode = {})).flags = getEmitFlags(node);
-            return updateNode(propertyAccess, node);
+        function tryParseAsyncSimpleArrowFunctionExpression() {
+            // We do a check here so that we won't be doing unnecessarily call to "lookAhead"
+            if (token() === 120 /* AsyncKeyword */) {
+                var isUnParenthesizedAsyncArrowFunction = lookAhead(isUnParenthesizedAsyncArrowFunctionWorker);
+                if (isUnParenthesizedAsyncArrowFunction === 1 /* True */) {
+                    var asyncModifier = parseModifiersForArrowFunction();
+                    var expr = parseBinaryExpressionOrHigher(/*precedence*/ 0);
+                    return parseSimpleArrowFunctionExpression(expr, asyncModifier);
+                }
+            }
+            return undefined;
         }
-        return node;
-    }
-    ts.updatePropertyAccess = updatePropertyAccess;
-    function createElementAccess(expression, index, location) {
-        var node = createNode(173 /* ElementAccessExpression */, location);
-        node.expression = parenthesizeForAccess(expression);
-        node.argumentExpression = typeof index === "number" ? createLiteral(index) : index;
-        return node;
-    }
-    ts.createElementAccess = createElementAccess;
-    function updateElementAccess(node, expression, argumentExpression) {
-        if (node.expression !== expression || node.argumentExpression !== argumentExpression) {
-            return updateNode(createElementAccess(expression, argumentExpression, node), node);
+        function isUnParenthesizedAsyncArrowFunctionWorker() {
+            // AsyncArrowFunctionExpression:
+            //      1) async[no LineTerminator here]AsyncArrowBindingIdentifier[?Yield][no LineTerminator here]=>AsyncConciseBody[?In]
+            //      2) CoverCallExpressionAndAsyncArrowHead[?Yield, ?Await][no LineTerminator here]=>AsyncConciseBody[?In]
+            if (token() === 120 /* AsyncKeyword */) {
+                nextToken();
+                // If the "async" is followed by "=>" token then it is not a begining of an async arrow-function
+                // but instead a simple arrow-function which will be parsed inside "parseAssignmentExpressionOrHigher"
+                if (scanner.hasPrecedingLineBreak() || token() === 36 /* EqualsGreaterThanToken */) {
+                    return 0 /* False */;
+                }
+                // Check for un-parenthesized AsyncArrowFunction
+                var expr = parseBinaryExpressionOrHigher(/*precedence*/ 0);
+                if (!scanner.hasPrecedingLineBreak() && expr.kind === 71 /* Identifier */ && token() === 36 /* EqualsGreaterThanToken */) {
+                    return 1 /* True */;
+                }
+            }
+            return 0 /* False */;
         }
-        return node;
-    }
-    ts.updateElementAccess = updateElementAccess;
-    function createCall(expression, typeArguments, argumentsArray, location, flags) {
-        var node = createNode(174 /* CallExpression */, location, flags);
-        node.expression = parenthesizeForAccess(expression);
-        if (typeArguments) {
-            node.typeArguments = createNodeArray(typeArguments);
+        function parseParenthesizedArrowFunctionExpressionHead(allowAmbiguity) {
+            var node = createNode(187 /* ArrowFunction */);
+            node.modifiers = parseModifiersForArrowFunction();
+            var isAsync = !!(ts.getModifierFlags(node) & 256 /* Async */);
+            // Arrow functions are never generators.
+            //
+            // If we're speculatively parsing a signature for a parenthesized arrow function, then
+            // we have to have a complete parameter list.  Otherwise we might see something like
+            // a => (b => c)
+            // And think that "(b =>" was actually a parenthesized arrow function with a missing
+            // close paren.
+            fillSignature(56 /* ColonToken */, /*yieldContext*/ false, /*awaitContext*/ isAsync, /*requireCompleteParameterList*/ !allowAmbiguity, node);
+            // If we couldn't get parameters, we definitely could not parse out an arrow function.
+            if (!node.parameters) {
+                return undefined;
+            }
+            // Parsing a signature isn't enough.
+            // Parenthesized arrow signatures often look like other valid expressions.
+            // For instance:
+            //  - "(x = 10)" is an assignment expression parsed as a signature with a default parameter value.
+            //  - "(x,y)" is a comma expression parsed as a signature with two parameters.
+            //  - "a ? (b): c" will have "(b):" parsed as a signature with a return type annotation.
+            //
+            // So we need just a bit of lookahead to ensure that it can only be a signature.
+            if (!allowAmbiguity && token() !== 36 /* EqualsGreaterThanToken */ && token() !== 17 /* OpenBraceToken */) {
+                // Returning undefined here will cause our caller to rewind to where we started from.
+                return undefined;
+            }
+            return node;
         }
-        node.arguments = parenthesizeListElements(createNodeArray(argumentsArray));
-        return node;
-    }
-    ts.createCall = createCall;
-    function updateCall(node, expression, typeArguments, argumentsArray) {
-        if (expression !== node.expression || typeArguments !== node.typeArguments || argumentsArray !== node.arguments) {
-            return updateNode(createCall(expression, typeArguments, argumentsArray, /*location*/ node, node.flags), node);
+        function parseArrowFunctionExpressionBody(isAsync) {
+            if (token() === 17 /* OpenBraceToken */) {
+                return parseFunctionBlock(/*allowYield*/ false, /*allowAwait*/ isAsync, /*ignoreMissingOpenBrace*/ false);
+            }
+            if (token() !== 25 /* SemicolonToken */ &&
+                token() !== 89 /* FunctionKeyword */ &&
+                token() !== 75 /* ClassKeyword */ &&
+                isStartOfStatement() &&
+                !isStartOfExpressionStatement()) {
+                // Check if we got a plain statement (i.e. no expression-statements, no function/class expressions/declarations)
+                //
+                // Here we try to recover from a potential error situation in the case where the
+                // user meant to supply a block. For example, if the user wrote:
+                //
+                //  a =>
+                //      let v = 0;
+                //  }
+                //
+                // they may be missing an open brace.  Check to see if that's the case so we can
+                // try to recover better.  If we don't do this, then the next close curly we see may end
+                // up preemptively closing the containing construct.
+                //
+                // Note: even when 'ignoreMissingOpenBrace' is passed as true, parseBody will still error.
+                return parseFunctionBlock(/*allowYield*/ false, /*allowAwait*/ isAsync, /*ignoreMissingOpenBrace*/ true);
+            }
+            return isAsync
+                ? doInAwaitContext(parseAssignmentExpressionOrHigher)
+                : doOutsideOfAwaitContext(parseAssignmentExpressionOrHigher);
         }
-        return node;
-    }
-    ts.updateCall = updateCall;
-    function createNew(expression, typeArguments, argumentsArray, location, flags) {
-        var node = createNode(175 /* NewExpression */, location, flags);
-        node.expression = parenthesizeForNew(expression);
-        node.typeArguments = typeArguments ? createNodeArray(typeArguments) : undefined;
-        node.arguments = argumentsArray ? parenthesizeListElements(createNodeArray(argumentsArray)) : undefined;
-        return node;
-    }
-    ts.createNew = createNew;
-    function updateNew(node, expression, typeArguments, argumentsArray) {
-        if (node.expression !== expression || node.typeArguments !== typeArguments || node.arguments !== argumentsArray) {
-            return updateNode(createNew(expression, typeArguments, argumentsArray, /*location*/ node, node.flags), node);
+        function parseConditionalExpressionRest(leftOperand) {
+            // Note: we are passed in an expression which was produced from parseBinaryExpressionOrHigher.
+            var questionToken = parseOptionalToken(55 /* QuestionToken */);
+            if (!questionToken) {
+                return leftOperand;
+            }
+            // Note: we explicitly 'allowIn' in the whenTrue part of the condition expression, and
+            // we do not that for the 'whenFalse' part.
+            var node = createNode(195 /* ConditionalExpression */, leftOperand.pos);
+            node.condition = leftOperand;
+            node.questionToken = questionToken;
+            node.whenTrue = doOutsideOfContext(disallowInAndDecoratorContext, parseAssignmentExpressionOrHigher);
+            node.colonToken = parseExpectedToken(56 /* ColonToken */, /*reportAtCurrentPosition*/ false, ts.Diagnostics._0_expected, ts.tokenToString(56 /* ColonToken */));
+            node.whenFalse = parseAssignmentExpressionOrHigher();
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateNew = updateNew;
-    function createTaggedTemplate(tag, template, location) {
-        var node = createNode(176 /* TaggedTemplateExpression */, location);
-        node.tag = parenthesizeForAccess(tag);
-        node.template = template;
-        return node;
-    }
-    ts.createTaggedTemplate = createTaggedTemplate;
-    function updateTaggedTemplate(node, tag, template) {
-        if (node.tag !== tag || node.template !== template) {
-            return updateNode(createTaggedTemplate(tag, template, node), node);
+        function parseBinaryExpressionOrHigher(precedence) {
+            var leftOperand = parseUnaryExpressionOrHigher();
+            return parseBinaryExpressionRest(precedence, leftOperand);
         }
-        return node;
-    }
-    ts.updateTaggedTemplate = updateTaggedTemplate;
-    function createParen(expression, location) {
-        var node = createNode(178 /* ParenthesizedExpression */, location);
-        node.expression = expression;
-        return node;
-    }
-    ts.createParen = createParen;
-    function updateParen(node, expression) {
-        if (node.expression !== expression) {
-            return updateNode(createParen(expression, node), node);
+        function isInOrOfKeyword(t) {
+            return t === 92 /* InKeyword */ || t === 142 /* OfKeyword */;
         }
-        return node;
-    }
-    ts.updateParen = updateParen;
-    function createFunctionExpression(asteriskToken, name, typeParameters, parameters, type, body, location, flags) {
-        var node = createNode(179 /* FunctionExpression */, location, flags);
-        node.modifiers = undefined;
-        node.asteriskToken = asteriskToken;
-        node.name = typeof name === "string" ? createIdentifier(name) : name;
-        node.typeParameters = typeParameters ? createNodeArray(typeParameters) : undefined;
-        node.parameters = createNodeArray(parameters);
-        node.type = type;
-        node.body = body;
-        return node;
-    }
-    ts.createFunctionExpression = createFunctionExpression;
-    function updateFunctionExpression(node, name, typeParameters, parameters, type, body) {
-        if (node.name !== name || node.typeParameters !== typeParameters || node.parameters !== parameters || node.type !== type || node.body !== body) {
-            return updateNode(createFunctionExpression(node.asteriskToken, name, typeParameters, parameters, type, body, /*location*/ node, node.flags), node);
+        function parseBinaryExpressionRest(precedence, leftOperand) {
+            while (true) {
+                // We either have a binary operator here, or we're finished.  We call
+                // reScanGreaterToken so that we merge token sequences like > and = into >=
+                reScanGreaterToken();
+                var newPrecedence = getBinaryOperatorPrecedence();
+                // Check the precedence to see if we should "take" this operator
+                // - For left associative operator (all operator but **), consume the operator,
+                //   recursively call the function below, and parse binaryExpression as a rightOperand
+                //   of the caller if the new precedence of the operator is greater then or equal to the current precedence.
+                //   For example:
+                //      a - b - c;
+                //            ^token; leftOperand = b. Return b to the caller as a rightOperand
+                //      a * b - c
+                //            ^token; leftOperand = b. Return b to the caller as a rightOperand
+                //      a - b * c;
+                //            ^token; leftOperand = b. Return b * c to the caller as a rightOperand
+                // - For right associative operator (**), consume the operator, recursively call the function
+                //   and parse binaryExpression as a rightOperand of the caller if the new precedence of
+                //   the operator is strictly grater than the current precedence
+                //   For example:
+                //      a ** b ** c;
+                //             ^^token; leftOperand = b. Return b ** c to the caller as a rightOperand
+                //      a - b ** c;
+                //            ^^token; leftOperand = b. Return b ** c to the caller as a rightOperand
+                //      a ** b - c
+                //             ^token; leftOperand = b. Return b to the caller as a rightOperand
+                var consumeCurrentOperator = token() === 40 /* AsteriskAsteriskToken */ ?
+                    newPrecedence >= precedence :
+                    newPrecedence > precedence;
+                if (!consumeCurrentOperator) {
+                    break;
+                }
+                if (token() === 92 /* InKeyword */ && inDisallowInContext()) {
+                    break;
+                }
+                if (token() === 118 /* AsKeyword */) {
+                    // Make sure we *do* perform ASI for constructs like this:
+                    //    var x = foo
+                    //    as (Bar)
+                    // This should be parsed as an initialized variable, followed
+                    // by a function call to 'as' with the argument 'Bar'
+                    if (scanner.hasPrecedingLineBreak()) {
+                        break;
+                    }
+                    else {
+                        nextToken();
+                        leftOperand = makeAsExpression(leftOperand, parseType());
+                    }
+                }
+                else {
+                    leftOperand = makeBinaryExpression(leftOperand, parseTokenNode(), parseBinaryExpressionOrHigher(newPrecedence));
+                }
+            }
+            return leftOperand;
         }
-        return node;
-    }
-    ts.updateFunctionExpression = updateFunctionExpression;
-    function createArrowFunction(modifiers, typeParameters, parameters, type, equalsGreaterThanToken, body, location, flags) {
-        var node = createNode(180 /* ArrowFunction */, location, flags);
-        node.modifiers = modifiers ? createNodeArray(modifiers) : undefined;
-        node.typeParameters = typeParameters ? createNodeArray(typeParameters) : undefined;
-        node.parameters = createNodeArray(parameters);
-        node.type = type;
-        node.equalsGreaterThanToken = equalsGreaterThanToken || createNode(34 /* EqualsGreaterThanToken */);
-        node.body = parenthesizeConciseBody(body);
-        return node;
-    }
-    ts.createArrowFunction = createArrowFunction;
-    function updateArrowFunction(node, modifiers, typeParameters, parameters, type, body) {
-        if (node.modifiers !== modifiers || node.typeParameters !== typeParameters || node.parameters !== parameters || node.type !== type || node.body !== body) {
-            return updateNode(createArrowFunction(modifiers, typeParameters, parameters, type, node.equalsGreaterThanToken, body, /*location*/ node, node.flags), node);
+        function isBinaryOperator() {
+            if (inDisallowInContext() && token() === 92 /* InKeyword */) {
+                return false;
+            }
+            return getBinaryOperatorPrecedence() > 0;
         }
-        return node;
-    }
-    ts.updateArrowFunction = updateArrowFunction;
-    function createDelete(expression, location) {
-        var node = createNode(181 /* DeleteExpression */, location);
-        node.expression = parenthesizePrefixOperand(expression);
-        return node;
-    }
-    ts.createDelete = createDelete;
-    function updateDelete(node, expression) {
-        if (node.expression !== expression) {
-            return updateNode(createDelete(expression, node), expression);
+        function getBinaryOperatorPrecedence() {
+            switch (token()) {
+                case 54 /* BarBarToken */:
+                    return 1;
+                case 53 /* AmpersandAmpersandToken */:
+                    return 2;
+                case 49 /* BarToken */:
+                    return 3;
+                case 50 /* CaretToken */:
+                    return 4;
+                case 48 /* AmpersandToken */:
+                    return 5;
+                case 32 /* EqualsEqualsToken */:
+                case 33 /* ExclamationEqualsToken */:
+                case 34 /* EqualsEqualsEqualsToken */:
+                case 35 /* ExclamationEqualsEqualsToken */:
+                    return 6;
+                case 27 /* LessThanToken */:
+                case 29 /* GreaterThanToken */:
+                case 30 /* LessThanEqualsToken */:
+                case 31 /* GreaterThanEqualsToken */:
+                case 93 /* InstanceOfKeyword */:
+                case 92 /* InKeyword */:
+                case 118 /* AsKeyword */:
+                    return 7;
+                case 45 /* LessThanLessThanToken */:
+                case 46 /* GreaterThanGreaterThanToken */:
+                case 47 /* GreaterThanGreaterThanGreaterThanToken */:
+                    return 8;
+                case 37 /* PlusToken */:
+                case 38 /* MinusToken */:
+                    return 9;
+                case 39 /* AsteriskToken */:
+                case 41 /* SlashToken */:
+                case 42 /* PercentToken */:
+                    return 10;
+                case 40 /* AsteriskAsteriskToken */:
+                    return 11;
+            }
+            // -1 is lower than all other precedences.  Returning it will cause binary expression
+            // parsing to stop.
+            return -1;
         }
-        return node;
-    }
-    ts.updateDelete = updateDelete;
-    function createTypeOf(expression, location) {
-        var node = createNode(182 /* TypeOfExpression */, location);
-        node.expression = parenthesizePrefixOperand(expression);
-        return node;
-    }
-    ts.createTypeOf = createTypeOf;
-    function updateTypeOf(node, expression) {
-        if (node.expression !== expression) {
-            return updateNode(createTypeOf(expression, node), expression);
+        function makeBinaryExpression(left, operatorToken, right) {
+            var node = createNode(194 /* BinaryExpression */, left.pos);
+            node.left = left;
+            node.operatorToken = operatorToken;
+            node.right = right;
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateTypeOf = updateTypeOf;
-    function createVoid(expression, location) {
-        var node = createNode(183 /* VoidExpression */, location);
-        node.expression = parenthesizePrefixOperand(expression);
-        return node;
-    }
-    ts.createVoid = createVoid;
-    function updateVoid(node, expression) {
-        if (node.expression !== expression) {
-            return updateNode(createVoid(expression, node), node);
+        function makeAsExpression(left, right) {
+            var node = createNode(202 /* AsExpression */, left.pos);
+            node.expression = left;
+            node.type = right;
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateVoid = updateVoid;
-    function createAwait(expression, location) {
-        var node = createNode(184 /* AwaitExpression */, location);
-        node.expression = parenthesizePrefixOperand(expression);
-        return node;
-    }
-    ts.createAwait = createAwait;
-    function updateAwait(node, expression) {
-        if (node.expression !== expression) {
-            return updateNode(createAwait(expression, node), node);
+        function parsePrefixUnaryExpression() {
+            var node = createNode(192 /* PrefixUnaryExpression */);
+            node.operator = token();
+            nextToken();
+            node.operand = parseSimpleUnaryExpression();
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateAwait = updateAwait;
-    function createPrefix(operator, operand, location) {
-        var node = createNode(185 /* PrefixUnaryExpression */, location);
-        node.operator = operator;
-        node.operand = parenthesizePrefixOperand(operand);
-        return node;
-    }
-    ts.createPrefix = createPrefix;
-    function updatePrefix(node, operand) {
-        if (node.operand !== operand) {
-            return updateNode(createPrefix(node.operator, operand, node), node);
+        function parseDeleteExpression() {
+            var node = createNode(188 /* DeleteExpression */);
+            nextToken();
+            node.expression = parseSimpleUnaryExpression();
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updatePrefix = updatePrefix;
-    function createPostfix(operand, operator, location) {
-        var node = createNode(186 /* PostfixUnaryExpression */, location);
-        node.operand = parenthesizePostfixOperand(operand);
-        node.operator = operator;
-        return node;
-    }
-    ts.createPostfix = createPostfix;
-    function updatePostfix(node, operand) {
-        if (node.operand !== operand) {
-            return updateNode(createPostfix(operand, node.operator, node), node);
+        function parseTypeOfExpression() {
+            var node = createNode(189 /* TypeOfExpression */);
+            nextToken();
+            node.expression = parseSimpleUnaryExpression();
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updatePostfix = updatePostfix;
-    function createBinary(left, operator, right, location) {
-        var operatorToken = typeof operator === "number" ? createSynthesizedNode(operator) : operator;
-        var operatorKind = operatorToken.kind;
-        var node = createNode(187 /* BinaryExpression */, location);
-        node.left = parenthesizeBinaryOperand(operatorKind, left, /*isLeftSideOfBinary*/ true, /*leftOperand*/ undefined);
-        node.operatorToken = operatorToken;
-        node.right = parenthesizeBinaryOperand(operatorKind, right, /*isLeftSideOfBinary*/ false, node.left);
-        return node;
-    }
-    ts.createBinary = createBinary;
-    function updateBinary(node, left, right) {
-        if (node.left !== left || node.right !== right) {
-            return updateNode(createBinary(left, node.operatorToken, right, /*location*/ node), node);
+        function parseVoidExpression() {
+            var node = createNode(190 /* VoidExpression */);
+            nextToken();
+            node.expression = parseSimpleUnaryExpression();
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateBinary = updateBinary;
-    function createConditional(condition, questionToken, whenTrue, colonToken, whenFalse, location) {
-        var node = createNode(188 /* ConditionalExpression */, location);
-        node.condition = condition;
-        node.questionToken = questionToken;
-        node.whenTrue = whenTrue;
-        node.colonToken = colonToken;
-        node.whenFalse = whenFalse;
-        return node;
-    }
-    ts.createConditional = createConditional;
-    function updateConditional(node, condition, whenTrue, whenFalse) {
-        if (node.condition !== condition || node.whenTrue !== whenTrue || node.whenFalse !== whenFalse) {
-            return updateNode(createConditional(condition, node.questionToken, whenTrue, node.colonToken, whenFalse, node), node);
+        function isAwaitExpression() {
+            if (token() === 121 /* AwaitKeyword */) {
+                if (inAwaitContext()) {
+                    return true;
+                }
+                // here we are using similar heuristics as 'isYieldExpression'
+                return lookAhead(nextTokenIsIdentifierOrKeywordOrLiteralOnSameLine);
+            }
+            return false;
         }
-        return node;
-    }
-    ts.updateConditional = updateConditional;
-    function createTemplateExpression(head, templateSpans, location) {
-        var node = createNode(189 /* TemplateExpression */, location);
-        node.head = head;
-        node.templateSpans = createNodeArray(templateSpans);
-        return node;
-    }
-    ts.createTemplateExpression = createTemplateExpression;
-    function updateTemplateExpression(node, head, templateSpans) {
-        if (node.head !== head || node.templateSpans !== templateSpans) {
-            return updateNode(createTemplateExpression(head, templateSpans, node), node);
+        function parseAwaitExpression() {
+            var node = createNode(191 /* AwaitExpression */);
+            nextToken();
+            node.expression = parseSimpleUnaryExpression();
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateTemplateExpression = updateTemplateExpression;
-    function createYield(asteriskToken, expression, location) {
-        var node = createNode(190 /* YieldExpression */, location);
-        node.asteriskToken = asteriskToken;
-        node.expression = expression;
-        return node;
-    }
-    ts.createYield = createYield;
-    function updateYield(node, expression) {
-        if (node.expression !== expression) {
-            return updateNode(createYield(node.asteriskToken, expression, node), node);
+        /**
+         * Parse ES7 exponential expression and await expression
+         *
+         * ES7 ExponentiationExpression:
+         *      1) UnaryExpression[?Yield]
+         *      2) UpdateExpression[?Yield] ** ExponentiationExpression[?Yield]
+         *
+         */
+        function parseUnaryExpressionOrHigher() {
+            /**
+             * ES7 UpdateExpression:
+             *      1) LeftHandSideExpression[?Yield]
+             *      2) LeftHandSideExpression[?Yield][no LineTerminator here]++
+             *      3) LeftHandSideExpression[?Yield][no LineTerminator here]--
+             *      4) ++UnaryExpression[?Yield]
+             *      5) --UnaryExpression[?Yield]
+             */
+            if (isUpdateExpression()) {
+                var updateExpression = parseUpdateExpression();
+                return token() === 40 /* AsteriskAsteriskToken */ ?
+                    parseBinaryExpressionRest(getBinaryOperatorPrecedence(), updateExpression) :
+                    updateExpression;
+            }
+            /**
+             * ES7 UnaryExpression:
+             *      1) UpdateExpression[?yield]
+             *      2) delete UpdateExpression[?yield]
+             *      3) void UpdateExpression[?yield]
+             *      4) typeof UpdateExpression[?yield]
+             *      5) + UpdateExpression[?yield]
+             *      6) - UpdateExpression[?yield]
+             *      7) ~ UpdateExpression[?yield]
+             *      8) ! UpdateExpression[?yield]
+             */
+            var unaryOperator = token();
+            var simpleUnaryExpression = parseSimpleUnaryExpression();
+            if (token() === 40 /* AsteriskAsteriskToken */) {
+                var start = ts.skipTrivia(sourceText, simpleUnaryExpression.pos);
+                if (simpleUnaryExpression.kind === 184 /* TypeAssertionExpression */) {
+                    parseErrorAtPosition(start, simpleUnaryExpression.end - start, ts.Diagnostics.A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses);
+                }
+                else {
+                    parseErrorAtPosition(start, simpleUnaryExpression.end - start, ts.Diagnostics.An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses, ts.tokenToString(unaryOperator));
+                }
+            }
+            return simpleUnaryExpression;
         }
-        return node;
-    }
-    ts.updateYield = updateYield;
-    function createSpread(expression, location) {
-        var node = createNode(191 /* SpreadElementExpression */, location);
-        node.expression = parenthesizeExpressionForList(expression);
-        return node;
-    }
-    ts.createSpread = createSpread;
-    function updateSpread(node, expression) {
-        if (node.expression !== expression) {
-            return updateNode(createSpread(expression, node), node);
+        /**
+         * Parse ES7 simple-unary expression or higher:
+         *
+         * ES7 UnaryExpression:
+         *      1) UpdateExpression[?yield]
+         *      2) delete UnaryExpression[?yield]
+         *      3) void UnaryExpression[?yield]
+         *      4) typeof UnaryExpression[?yield]
+         *      5) + UnaryExpression[?yield]
+         *      6) - UnaryExpression[?yield]
+         *      7) ~ UnaryExpression[?yield]
+         *      8) ! UnaryExpression[?yield]
+         *      9) [+Await] await UnaryExpression[?yield]
+         */
+        function parseSimpleUnaryExpression() {
+            switch (token()) {
+                case 37 /* PlusToken */:
+                case 38 /* MinusToken */:
+                case 52 /* TildeToken */:
+                case 51 /* ExclamationToken */:
+                    return parsePrefixUnaryExpression();
+                case 80 /* DeleteKeyword */:
+                    return parseDeleteExpression();
+                case 103 /* TypeOfKeyword */:
+                    return parseTypeOfExpression();
+                case 105 /* VoidKeyword */:
+                    return parseVoidExpression();
+                case 27 /* LessThanToken */:
+                    // This is modified UnaryExpression grammar in TypeScript
+                    //  UnaryExpression (modified):
+                    //      < type > UnaryExpression
+                    return parseTypeAssertion();
+                case 121 /* AwaitKeyword */:
+                    if (isAwaitExpression()) {
+                        return parseAwaitExpression();
+                    }
+                // falls through
+                default:
+                    return parseUpdateExpression();
+            }
         }
-        return node;
-    }
-    ts.updateSpread = updateSpread;
-    function createClassExpression(modifiers, name, typeParameters, heritageClauses, members, location) {
-        var node = createNode(192 /* ClassExpression */, location);
-        node.decorators = undefined;
-        node.modifiers = modifiers ? createNodeArray(modifiers) : undefined;
-        node.name = name;
-        node.typeParameters = typeParameters ? createNodeArray(typeParameters) : undefined;
-        node.heritageClauses = createNodeArray(heritageClauses);
-        node.members = createNodeArray(members);
-        return node;
-    }
-    ts.createClassExpression = createClassExpression;
-    function updateClassExpression(node, modifiers, name, typeParameters, heritageClauses, members) {
-        if (node.modifiers !== modifiers || node.name !== name || node.typeParameters !== typeParameters || node.heritageClauses !== heritageClauses || node.members !== members) {
-            return updateNode(createClassExpression(modifiers, name, typeParameters, heritageClauses, members, node), node);
+        /**
+         * Check if the current token can possibly be an ES7 increment expression.
+         *
+         * ES7 UpdateExpression:
+         *      LeftHandSideExpression[?Yield]
+         *      LeftHandSideExpression[?Yield][no LineTerminator here]++
+         *      LeftHandSideExpression[?Yield][no LineTerminator here]--
+         *      ++LeftHandSideExpression[?Yield]
+         *      --LeftHandSideExpression[?Yield]
+         */
+        function isUpdateExpression() {
+            // This function is called inside parseUnaryExpression to decide
+            // whether to call parseSimpleUnaryExpression or call parseUpdateExpression directly
+            switch (token()) {
+                case 37 /* PlusToken */:
+                case 38 /* MinusToken */:
+                case 52 /* TildeToken */:
+                case 51 /* ExclamationToken */:
+                case 80 /* DeleteKeyword */:
+                case 103 /* TypeOfKeyword */:
+                case 105 /* VoidKeyword */:
+                case 121 /* AwaitKeyword */:
+                    return false;
+                case 27 /* LessThanToken */:
+                    // If we are not in JSX context, we are parsing TypeAssertion which is an UnaryExpression
+                    if (sourceFile.languageVariant !== 1 /* JSX */) {
+                        return false;
+                    }
+                // We are in JSX context and the token is part of JSXElement.
+                // falls through
+                default:
+                    return true;
+            }
         }
-        return node;
-    }
-    ts.updateClassExpression = updateClassExpression;
-    function createOmittedExpression(location) {
-        var node = createNode(193 /* OmittedExpression */, location);
-        return node;
-    }
-    ts.createOmittedExpression = createOmittedExpression;
-    function createExpressionWithTypeArguments(typeArguments, expression, location) {
-        var node = createNode(194 /* ExpressionWithTypeArguments */, location);
-        node.typeArguments = typeArguments ? createNodeArray(typeArguments) : undefined;
-        node.expression = parenthesizeForAccess(expression);
-        return node;
-    }
-    ts.createExpressionWithTypeArguments = createExpressionWithTypeArguments;
-    function updateExpressionWithTypeArguments(node, typeArguments, expression) {
-        if (node.typeArguments !== typeArguments || node.expression !== expression) {
-            return updateNode(createExpressionWithTypeArguments(typeArguments, expression, node), node);
+        /**
+         * Parse ES7 UpdateExpression. UpdateExpression is used instead of ES6's PostFixExpression.
+         *
+         * ES7 UpdateExpression[yield]:
+         *      1) LeftHandSideExpression[?yield]
+         *      2) LeftHandSideExpression[?yield] [[no LineTerminator here]]++
+         *      3) LeftHandSideExpression[?yield] [[no LineTerminator here]]--
+         *      4) ++LeftHandSideExpression[?yield]
+         *      5) --LeftHandSideExpression[?yield]
+         * In TypeScript (2), (3) are parsed as PostfixUnaryExpression. (4), (5) are parsed as PrefixUnaryExpression
+         */
+        function parseUpdateExpression() {
+            if (token() === 43 /* PlusPlusToken */ || token() === 44 /* MinusMinusToken */) {
+                var node = createNode(192 /* PrefixUnaryExpression */);
+                node.operator = token();
+                nextToken();
+                node.operand = parseLeftHandSideExpressionOrHigher();
+                return finishNode(node);
+            }
+            else if (sourceFile.languageVariant === 1 /* JSX */ && token() === 27 /* LessThanToken */ && lookAhead(nextTokenIsIdentifierOrKeyword)) {
+                // JSXElement is part of primaryExpression
+                return parseJsxElementOrSelfClosingElement(/*inExpressionContext*/ true);
+            }
+            var expression = parseLeftHandSideExpressionOrHigher();
+            ts.Debug.assert(ts.isLeftHandSideExpression(expression));
+            if ((token() === 43 /* PlusPlusToken */ || token() === 44 /* MinusMinusToken */) && !scanner.hasPrecedingLineBreak()) {
+                var node = createNode(193 /* PostfixUnaryExpression */, expression.pos);
+                node.operand = expression;
+                node.operator = token();
+                nextToken();
+                return finishNode(node);
+            }
+            return expression;
         }
-        return node;
-    }
-    ts.updateExpressionWithTypeArguments = updateExpressionWithTypeArguments;
-    // Misc
-    function createTemplateSpan(expression, literal, location) {
-        var node = createNode(197 /* TemplateSpan */, location);
-        node.expression = expression;
-        node.literal = literal;
-        return node;
-    }
-    ts.createTemplateSpan = createTemplateSpan;
-    function updateTemplateSpan(node, expression, literal) {
-        if (node.expression !== expression || node.literal !== literal) {
-            return updateNode(createTemplateSpan(expression, literal, node), node);
+        function parseLeftHandSideExpressionOrHigher() {
+            // Original Ecma:
+            // LeftHandSideExpression: See 11.2
+            //      NewExpression
+            //      CallExpression
+            //
+            // Our simplification:
+            //
+            // LeftHandSideExpression: See 11.2
+            //      MemberExpression
+            //      CallExpression
+            //
+            // See comment in parseMemberExpressionOrHigher on how we replaced NewExpression with
+            // MemberExpression to make our lives easier.
+            //
+            // to best understand the below code, it's important to see how CallExpression expands
+            // out into its own productions:
+            //
+            // CallExpression:
+            //      MemberExpression Arguments
+            //      CallExpression Arguments
+            //      CallExpression[Expression]
+            //      CallExpression.IdentifierName
+            //      import (AssignmentExpression)
+            //      super Arguments
+            //      super.IdentifierName
+            //
+            // Because of the recursion in these calls, we need to bottom out first. There are three
+            // bottom out states we can run into: 1) We see 'super' which must start either of
+            // the last two CallExpression productions. 2) We see 'import' which must start import call.
+            // 3)we have a MemberExpression which either completes the LeftHandSideExpression,
+            // or starts the beginning of the first four CallExpression productions.
+            var expression;
+            if (token() === 91 /* ImportKeyword */) {
+                // We don't want to eagerly consume all import keyword as import call expression so we look a head to find "("
+                // For example:
+                //      var foo3 = require("subfolder
+                //      import * as foo1 from "module-from-node  -> we want this import to be a statement rather than import call expression
+                sourceFile.flags |= 524288 /* PossiblyContainsDynamicImport */;
+                expression = parseTokenNode();
+            }
+            else {
+                expression = token() === 97 /* SuperKeyword */ ? parseSuperExpression() : parseMemberExpressionOrHigher();
+            }
+            // Now, we *may* be complete.  However, we might have consumed the start of a
+            // CallExpression.  As such, we need to consume the rest of it here to be complete.
+            return parseCallExpressionRest(expression);
         }
-        return node;
-    }
-    ts.updateTemplateSpan = updateTemplateSpan;
-    // Element
-    function createBlock(statements, location, multiLine, flags) {
-        var block = createNode(199 /* Block */, location, flags);
-        block.statements = createNodeArray(statements);
-        if (multiLine) {
-            block.multiLine = true;
+        function parseMemberExpressionOrHigher() {
+            // Note: to make our lives simpler, we decompose the NewExpression productions and
+            // place ObjectCreationExpression and FunctionExpression into PrimaryExpression.
+            // like so:
+            //
+            //   PrimaryExpression : See 11.1
+            //      this
+            //      Identifier
+            //      Literal
+            //      ArrayLiteral
+            //      ObjectLiteral
+            //      (Expression)
+            //      FunctionExpression
+            //      new MemberExpression Arguments?
+            //
+            //   MemberExpression : See 11.2
+            //      PrimaryExpression
+            //      MemberExpression[Expression]
+            //      MemberExpression.IdentifierName
+            //
+            //   CallExpression : See 11.2
+            //      MemberExpression
+            //      CallExpression Arguments
+            //      CallExpression[Expression]
+            //      CallExpression.IdentifierName
+            //
+            // Technically this is ambiguous.  i.e. CallExpression defines:
+            //
+            //   CallExpression:
+            //      CallExpression Arguments
+            //
+            // If you see: "new Foo()"
+            //
+            // Then that could be treated as a single ObjectCreationExpression, or it could be
+            // treated as the invocation of "new Foo".  We disambiguate that in code (to match
+            // the original grammar) by making sure that if we see an ObjectCreationExpression
+            // we always consume arguments if they are there. So we treat "new Foo()" as an
+            // object creation only, and not at all as an invocation)  Another way to think
+            // about this is that for every "new" that we see, we will consume an argument list if
+            // it is there as part of the *associated* object creation node.  Any additional
+            // argument lists we see, will become invocation expressions.
+            //
+            // Because there are no other places in the grammar now that refer to FunctionExpression
+            // or ObjectCreationExpression, it is safe to push down into the PrimaryExpression
+            // production.
+            //
+            // Because CallExpression and MemberExpression are left recursive, we need to bottom out
+            // of the recursion immediately.  So we parse out a primary expression to start with.
+            var expression = parsePrimaryExpression();
+            return parseMemberExpressionRest(expression);
         }
-        return block;
-    }
-    ts.createBlock = createBlock;
-    function updateBlock(node, statements) {
-        if (statements !== node.statements) {
-            return updateNode(createBlock(statements, /*location*/ node, node.multiLine, node.flags), node);
+        function parseSuperExpression() {
+            var expression = parseTokenNode();
+            if (token() === 19 /* OpenParenToken */ || token() === 23 /* DotToken */ || token() === 21 /* OpenBracketToken */) {
+                return expression;
+            }
+            // If we have seen "super" it must be followed by '(' or '.'.
+            // If it wasn't then just try to parse out a '.' and report an error.
+            var node = createNode(179 /* PropertyAccessExpression */, expression.pos);
+            node.expression = expression;
+            parseExpectedToken(23 /* DotToken */, /*reportAtCurrentPosition*/ false, ts.Diagnostics.super_must_be_followed_by_an_argument_list_or_member_access);
+            node.name = parseRightSideOfDot(/*allowIdentifierNames*/ true);
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateBlock = updateBlock;
-    function createVariableStatement(modifiers, declarationList, location, flags) {
-        var node = createNode(200 /* VariableStatement */, location, flags);
-        node.decorators = undefined;
-        node.modifiers = modifiers ? createNodeArray(modifiers) : undefined;
-        node.declarationList = ts.isArray(declarationList) ? createVariableDeclarationList(declarationList) : declarationList;
-        return node;
-    }
-    ts.createVariableStatement = createVariableStatement;
-    function updateVariableStatement(node, modifiers, declarationList) {
-        if (node.modifiers !== modifiers || node.declarationList !== declarationList) {
-            return updateNode(createVariableStatement(modifiers, declarationList, /*location*/ node, node.flags), node);
+        function tagNamesAreEquivalent(lhs, rhs) {
+            if (lhs.kind !== rhs.kind) {
+                return false;
+            }
+            if (lhs.kind === 71 /* Identifier */) {
+                return lhs.text === rhs.text;
+            }
+            if (lhs.kind === 99 /* ThisKeyword */) {
+                return true;
+            }
+            // If we are at this statement then we must have PropertyAccessExpression and because tag name in Jsx element can only
+            // take forms of JsxTagNameExpression which includes an identifier, "this" expression, or another propertyAccessExpression
+            // it is safe to case the expression property as such. See parseJsxElementName for how we parse tag name in Jsx element
+            return lhs.name.text === rhs.name.text &&
+                tagNamesAreEquivalent(lhs.expression, rhs.expression);
         }
-        return node;
-    }
-    ts.updateVariableStatement = updateVariableStatement;
-    function createVariableDeclarationList(declarations, location, flags) {
-        var node = createNode(219 /* VariableDeclarationList */, location, flags);
-        node.declarations = createNodeArray(declarations);
-        return node;
-    }
-    ts.createVariableDeclarationList = createVariableDeclarationList;
-    function updateVariableDeclarationList(node, declarations) {
-        if (node.declarations !== declarations) {
-            return updateNode(createVariableDeclarationList(declarations, /*location*/ node, node.flags), node);
+        function parseJsxElementOrSelfClosingElement(inExpressionContext) {
+            var opening = parseJsxOpeningOrSelfClosingElement(inExpressionContext);
+            var result;
+            if (opening.kind === 251 /* JsxOpeningElement */) {
+                var node = createNode(249 /* JsxElement */, opening.pos);
+                node.openingElement = opening;
+                node.children = parseJsxChildren(node.openingElement.tagName);
+                node.closingElement = parseJsxClosingElement(inExpressionContext);
+                if (!tagNamesAreEquivalent(node.openingElement.tagName, node.closingElement.tagName)) {
+                    parseErrorAtPosition(node.closingElement.pos, node.closingElement.end - node.closingElement.pos, ts.Diagnostics.Expected_corresponding_JSX_closing_tag_for_0, ts.getTextOfNodeFromSourceText(sourceText, node.openingElement.tagName));
+                }
+                result = finishNode(node);
+            }
+            else {
+                ts.Debug.assert(opening.kind === 250 /* JsxSelfClosingElement */);
+                // Nothing else to do for self-closing elements
+                result = opening;
+            }
+            // If the user writes the invalid code '<div></div><div></div>' in an expression context (i.e. not wrapped in
+            // an enclosing tag), we'll naively try to parse   ^ this as a 'less than' operator and the remainder of the tag
+            // as garbage, which will cause the formatter to badly mangle the JSX. Perform a speculative parse of a JSX
+            // element if we see a < token so that we can wrap it in a synthetic binary expression so the formatter
+            // does less damage and we can report a better error.
+            // Since JSX elements are invalid < operands anyway, this lookahead parse will only occur in error scenarios
+            // of one sort or another.
+            if (inExpressionContext && token() === 27 /* LessThanToken */) {
+                var invalidElement = tryParse(function () { return parseJsxElementOrSelfClosingElement(/*inExpressionContext*/ true); });
+                if (invalidElement) {
+                    parseErrorAtCurrentToken(ts.Diagnostics.JSX_expressions_must_have_one_parent_element);
+                    var badNode = createNode(194 /* BinaryExpression */, result.pos);
+                    badNode.end = invalidElement.end;
+                    badNode.left = result;
+                    badNode.right = invalidElement;
+                    badNode.operatorToken = createMissingNode(26 /* CommaToken */, /*reportAtCurrentPosition*/ false, /*diagnosticMessage*/ undefined);
+                    badNode.operatorToken.pos = badNode.operatorToken.end = badNode.right.pos;
+                    return badNode;
+                }
+            }
+            return result;
         }
-        return node;
-    }
-    ts.updateVariableDeclarationList = updateVariableDeclarationList;
-    function createVariableDeclaration(name, type, initializer, location, flags) {
-        var node = createNode(218 /* VariableDeclaration */, location, flags);
-        node.name = typeof name === "string" ? createIdentifier(name) : name;
-        node.type = type;
-        node.initializer = initializer !== undefined ? parenthesizeExpressionForList(initializer) : undefined;
-        return node;
-    }
-    ts.createVariableDeclaration = createVariableDeclaration;
-    function updateVariableDeclaration(node, name, type, initializer) {
-        if (node.name !== name || node.type !== type || node.initializer !== initializer) {
-            return updateNode(createVariableDeclaration(name, type, initializer, /*location*/ node, node.flags), node);
+        function parseJsxText() {
+            var node = createNode(10 /* JsxText */, scanner.getStartPos());
+            node.containsOnlyWhiteSpaces = currentToken === 11 /* JsxTextAllWhiteSpaces */;
+            currentToken = scanner.scanJsxToken();
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateVariableDeclaration = updateVariableDeclaration;
-    function createEmptyStatement(location) {
-        return createNode(201 /* EmptyStatement */, location);
-    }
-    ts.createEmptyStatement = createEmptyStatement;
-    function createStatement(expression, location, flags) {
-        var node = createNode(202 /* ExpressionStatement */, location, flags);
-        node.expression = parenthesizeExpressionForExpressionStatement(expression);
-        return node;
-    }
-    ts.createStatement = createStatement;
-    function updateStatement(node, expression) {
-        if (node.expression !== expression) {
-            return updateNode(createStatement(expression, /*location*/ node, node.flags), node);
+        function parseJsxChild() {
+            switch (token()) {
+                case 10 /* JsxText */:
+                case 11 /* JsxTextAllWhiteSpaces */:
+                    return parseJsxText();
+                case 17 /* OpenBraceToken */:
+                    return parseJsxExpression(/*inExpressionContext*/ false);
+                case 27 /* LessThanToken */:
+                    return parseJsxElementOrSelfClosingElement(/*inExpressionContext*/ false);
+            }
+            ts.Debug.fail("Unknown JSX child kind " + token());
         }
-        return node;
-    }
-    ts.updateStatement = updateStatement;
-    function createIf(expression, thenStatement, elseStatement, location) {
-        var node = createNode(203 /* IfStatement */, location);
-        node.expression = expression;
-        node.thenStatement = thenStatement;
-        node.elseStatement = elseStatement;
-        return node;
-    }
-    ts.createIf = createIf;
-    function updateIf(node, expression, thenStatement, elseStatement) {
-        if (node.expression !== expression || node.thenStatement !== thenStatement || node.elseStatement !== elseStatement) {
-            return updateNode(createIf(expression, thenStatement, elseStatement, /*location*/ node), node);
+        function parseJsxChildren(openingTagName) {
+            var result = createNodeArray();
+            var saveParsingContext = parsingContext;
+            parsingContext |= 1 << 14 /* JsxChildren */;
+            while (true) {
+                currentToken = scanner.reScanJsxToken();
+                if (token() === 28 /* LessThanSlashToken */) {
+                    // Closing tag
+                    break;
+                }
+                else if (token() === 1 /* EndOfFileToken */) {
+                    // If we hit EOF, issue the error at the tag that lacks the closing element
+                    // rather than at the end of the file (which is useless)
+                    parseErrorAtPosition(openingTagName.pos, openingTagName.end - openingTagName.pos, ts.Diagnostics.JSX_element_0_has_no_corresponding_closing_tag, ts.getTextOfNodeFromSourceText(sourceText, openingTagName));
+                    break;
+                }
+                else if (token() === 7 /* ConflictMarkerTrivia */) {
+                    break;
+                }
+                var child = parseJsxChild();
+                if (child) {
+                    result.push(child);
+                }
+            }
+            result.end = scanner.getTokenPos();
+            parsingContext = saveParsingContext;
+            return result;
         }
-        return node;
-    }
-    ts.updateIf = updateIf;
-    function createDo(statement, expression, location) {
-        var node = createNode(204 /* DoStatement */, location);
-        node.statement = statement;
-        node.expression = expression;
-        return node;
-    }
-    ts.createDo = createDo;
-    function updateDo(node, statement, expression) {
-        if (node.statement !== statement || node.expression !== expression) {
-            return updateNode(createDo(statement, expression, node), node);
+        function parseJsxAttributes() {
+            var jsxAttributes = createNode(254 /* JsxAttributes */);
+            jsxAttributes.properties = parseList(13 /* JsxAttributes */, parseJsxAttribute);
+            return finishNode(jsxAttributes);
         }
-        return node;
-    }
-    ts.updateDo = updateDo;
-    function createWhile(expression, statement, location) {
-        var node = createNode(205 /* WhileStatement */, location);
-        node.expression = expression;
-        node.statement = statement;
-        return node;
-    }
-    ts.createWhile = createWhile;
-    function updateWhile(node, expression, statement) {
-        if (node.expression !== expression || node.statement !== statement) {
-            return updateNode(createWhile(expression, statement, node), node);
+        function parseJsxOpeningOrSelfClosingElement(inExpressionContext) {
+            var fullStart = scanner.getStartPos();
+            parseExpected(27 /* LessThanToken */);
+            var tagName = parseJsxElementName();
+            var attributes = parseJsxAttributes();
+            var node;
+            if (token() === 29 /* GreaterThanToken */) {
+                // Closing tag, so scan the immediately-following text with the JSX scanning instead
+                // of regular scanning to avoid treating illegal characters (e.g. '#') as immediate
+                // scanning errors
+                node = createNode(251 /* JsxOpeningElement */, fullStart);
+                scanJsxText();
+            }
+            else {
+                parseExpected(41 /* SlashToken */);
+                if (inExpressionContext) {
+                    parseExpected(29 /* GreaterThanToken */);
+                }
+                else {
+                    parseExpected(29 /* GreaterThanToken */, /*diagnostic*/ undefined, /*shouldAdvance*/ false);
+                    scanJsxText();
+                }
+                node = createNode(250 /* JsxSelfClosingElement */, fullStart);
+            }
+            node.tagName = tagName;
+            node.attributes = attributes;
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateWhile = updateWhile;
-    function createFor(initializer, condition, incrementor, statement, location) {
-        var node = createNode(206 /* ForStatement */, location, /*flags*/ undefined);
-        node.initializer = initializer;
-        node.condition = condition;
-        node.incrementor = incrementor;
-        node.statement = statement;
-        return node;
-    }
-    ts.createFor = createFor;
-    function updateFor(node, initializer, condition, incrementor, statement) {
-        if (node.initializer !== initializer || node.condition !== condition || node.incrementor !== incrementor || node.statement !== statement) {
-            return updateNode(createFor(initializer, condition, incrementor, statement, node), node);
+        function parseJsxElementName() {
+            scanJsxIdentifier();
+            // JsxElement can have name in the form of
+            //      propertyAccessExpression
+            //      primaryExpression in the form of an identifier and "this" keyword
+            // We can't just simply use parseLeftHandSideExpressionOrHigher because then we will start consider class,function etc as a keyword
+            // We only want to consider "this" as a primaryExpression
+            var expression = token() === 99 /* ThisKeyword */ ?
+                parseTokenNode() : parseIdentifierName();
+            while (parseOptional(23 /* DotToken */)) {
+                var propertyAccess = createNode(179 /* PropertyAccessExpression */, expression.pos);
+                propertyAccess.expression = expression;
+                propertyAccess.name = parseRightSideOfDot(/*allowIdentifierNames*/ true);
+                expression = finishNode(propertyAccess);
+            }
+            return expression;
+        }
+        function parseJsxExpression(inExpressionContext) {
+            var node = createNode(256 /* JsxExpression */);
+            parseExpected(17 /* OpenBraceToken */);
+            if (token() !== 18 /* CloseBraceToken */) {
+                node.dotDotDotToken = parseOptionalToken(24 /* DotDotDotToken */);
+                node.expression = parseAssignmentExpressionOrHigher();
+            }
+            if (inExpressionContext) {
+                parseExpected(18 /* CloseBraceToken */);
+            }
+            else {
+                parseExpected(18 /* CloseBraceToken */, /*message*/ undefined, /*shouldAdvance*/ false);
+                scanJsxText();
+            }
+            return finishNode(node);
+        }
+        function parseJsxAttribute() {
+            if (token() === 17 /* OpenBraceToken */) {
+                return parseJsxSpreadAttribute();
+            }
+            scanJsxIdentifier();
+            var node = createNode(253 /* JsxAttribute */);
+            node.name = parseIdentifierName();
+            if (token() === 58 /* EqualsToken */) {
+                switch (scanJsxAttributeValue()) {
+                    case 9 /* StringLiteral */:
+                        node.initializer = parseLiteralNode();
+                        break;
+                    default:
+                        node.initializer = parseJsxExpression(/*inExpressionContext*/ true);
+                        break;
+                }
+            }
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateFor = updateFor;
-    function createForIn(initializer, expression, statement, location) {
-        var node = createNode(207 /* ForInStatement */, location);
-        node.initializer = initializer;
-        node.expression = expression;
-        node.statement = statement;
-        return node;
-    }
-    ts.createForIn = createForIn;
-    function updateForIn(node, initializer, expression, statement) {
-        if (node.initializer !== initializer || node.expression !== expression || node.statement !== statement) {
-            return updateNode(createForIn(initializer, expression, statement, node), node);
+        function parseJsxSpreadAttribute() {
+            var node = createNode(255 /* JsxSpreadAttribute */);
+            parseExpected(17 /* OpenBraceToken */);
+            parseExpected(24 /* DotDotDotToken */);
+            node.expression = parseExpression();
+            parseExpected(18 /* CloseBraceToken */);
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateForIn = updateForIn;
-    function createForOf(initializer, expression, statement, location) {
-        var node = createNode(208 /* ForOfStatement */, location);
-        node.initializer = initializer;
-        node.expression = expression;
-        node.statement = statement;
-        return node;
-    }
-    ts.createForOf = createForOf;
-    function updateForOf(node, initializer, expression, statement) {
-        if (node.initializer !== initializer || node.expression !== expression || node.statement !== statement) {
-            return updateNode(createForOf(initializer, expression, statement, node), node);
+        function parseJsxClosingElement(inExpressionContext) {
+            var node = createNode(252 /* JsxClosingElement */);
+            parseExpected(28 /* LessThanSlashToken */);
+            node.tagName = parseJsxElementName();
+            if (inExpressionContext) {
+                parseExpected(29 /* GreaterThanToken */);
+            }
+            else {
+                parseExpected(29 /* GreaterThanToken */, /*diagnostic*/ undefined, /*shouldAdvance*/ false);
+                scanJsxText();
+            }
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateForOf = updateForOf;
-    function createContinue(label, location) {
-        var node = createNode(209 /* ContinueStatement */, location);
-        if (label) {
-            node.label = label;
+        function parseTypeAssertion() {
+            var node = createNode(184 /* TypeAssertionExpression */);
+            parseExpected(27 /* LessThanToken */);
+            node.type = parseType();
+            parseExpected(29 /* GreaterThanToken */);
+            node.expression = parseSimpleUnaryExpression();
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.createContinue = createContinue;
-    function updateContinue(node, label) {
-        if (node.label !== label) {
-            return updateNode(createContinue(label, node), node);
+        function parseMemberExpressionRest(expression) {
+            while (true) {
+                var dotToken = parseOptionalToken(23 /* DotToken */);
+                if (dotToken) {
+                    var propertyAccess = createNode(179 /* PropertyAccessExpression */, expression.pos);
+                    propertyAccess.expression = expression;
+                    propertyAccess.name = parseRightSideOfDot(/*allowIdentifierNames*/ true);
+                    expression = finishNode(propertyAccess);
+                    continue;
+                }
+                if (token() === 51 /* ExclamationToken */ && !scanner.hasPrecedingLineBreak()) {
+                    nextToken();
+                    var nonNullExpression = createNode(203 /* NonNullExpression */, expression.pos);
+                    nonNullExpression.expression = expression;
+                    expression = finishNode(nonNullExpression);
+                    continue;
+                }
+                // when in the [Decorator] context, we do not parse ElementAccess as it could be part of a ComputedPropertyName
+                if (!inDecoratorContext() && parseOptional(21 /* OpenBracketToken */)) {
+                    var indexedAccess = createNode(180 /* ElementAccessExpression */, expression.pos);
+                    indexedAccess.expression = expression;
+                    // It's not uncommon for a user to write: "new Type[]".
+                    // Check for that common pattern and report a better error message.
+                    if (token() !== 22 /* CloseBracketToken */) {
+                        indexedAccess.argumentExpression = allowInAnd(parseExpression);
+                        if (indexedAccess.argumentExpression.kind === 9 /* StringLiteral */ || indexedAccess.argumentExpression.kind === 8 /* NumericLiteral */) {
+                            var literal = indexedAccess.argumentExpression;
+                            literal.text = internIdentifier(literal.text);
+                        }
+                    }
+                    parseExpected(22 /* CloseBracketToken */);
+                    expression = finishNode(indexedAccess);
+                    continue;
+                }
+                if (token() === 13 /* NoSubstitutionTemplateLiteral */ || token() === 14 /* TemplateHead */) {
+                    var tagExpression = createNode(183 /* TaggedTemplateExpression */, expression.pos);
+                    tagExpression.tag = expression;
+                    tagExpression.template = token() === 13 /* NoSubstitutionTemplateLiteral */
+                        ? parseLiteralNode()
+                        : parseTemplateExpression();
+                    expression = finishNode(tagExpression);
+                    continue;
+                }
+                return expression;
+            }
         }
-        return node;
-    }
-    ts.updateContinue = updateContinue;
-    function createBreak(label, location) {
-        var node = createNode(210 /* BreakStatement */, location);
-        if (label) {
-            node.label = label;
+        function parseCallExpressionRest(expression) {
+            while (true) {
+                expression = parseMemberExpressionRest(expression);
+                if (token() === 27 /* LessThanToken */) {
+                    // See if this is the start of a generic invocation.  If so, consume it and
+                    // keep checking for postfix expressions.  Otherwise, it's just a '<' that's
+                    // part of an arithmetic expression.  Break out so we consume it higher in the
+                    // stack.
+                    var typeArguments = tryParse(parseTypeArgumentsInExpression);
+                    if (!typeArguments) {
+                        return expression;
+                    }
+                    var callExpr = createNode(181 /* CallExpression */, expression.pos);
+                    callExpr.expression = expression;
+                    callExpr.typeArguments = typeArguments;
+                    callExpr.arguments = parseArgumentList();
+                    expression = finishNode(callExpr);
+                    continue;
+                }
+                else if (token() === 19 /* OpenParenToken */) {
+                    var callExpr = createNode(181 /* CallExpression */, expression.pos);
+                    callExpr.expression = expression;
+                    callExpr.arguments = parseArgumentList();
+                    expression = finishNode(callExpr);
+                    continue;
+                }
+                return expression;
+            }
         }
-        return node;
-    }
-    ts.createBreak = createBreak;
-    function updateBreak(node, label) {
-        if (node.label !== label) {
-            return updateNode(createBreak(label, node), node);
+        function parseArgumentList() {
+            parseExpected(19 /* OpenParenToken */);
+            var result = parseDelimitedList(11 /* ArgumentExpressions */, parseArgumentExpression);
+            parseExpected(20 /* CloseParenToken */);
+            return result;
         }
-        return node;
-    }
-    ts.updateBreak = updateBreak;
-    function createReturn(expression, location) {
-        var node = createNode(211 /* ReturnStatement */, location);
-        node.expression = expression;
-        return node;
-    }
-    ts.createReturn = createReturn;
-    function updateReturn(node, expression) {
-        if (node.expression !== expression) {
-            return updateNode(createReturn(expression, /*location*/ node), node);
+        function parseTypeArgumentsInExpression() {
+            if (!parseOptional(27 /* LessThanToken */)) {
+                return undefined;
+            }
+            var typeArguments = parseDelimitedList(19 /* TypeArguments */, parseType);
+            if (!parseExpected(29 /* GreaterThanToken */)) {
+                // If it doesn't have the closing >  then it's definitely not an type argument list.
+                return undefined;
+            }
+            // If we have a '<', then only parse this as a argument list if the type arguments
+            // are complete and we have an open paren.  if we don't, rewind and return nothing.
+            return typeArguments && canFollowTypeArgumentsInExpression()
+                ? typeArguments
+                : undefined;
         }
-        return node;
-    }
-    ts.updateReturn = updateReturn;
-    function createWith(expression, statement, location) {
-        var node = createNode(212 /* WithStatement */, location);
-        node.expression = expression;
-        node.statement = statement;
-        return node;
-    }
-    ts.createWith = createWith;
-    function updateWith(node, expression, statement) {
-        if (node.expression !== expression || node.statement !== statement) {
-            return updateNode(createWith(expression, statement, node), node);
+        function canFollowTypeArgumentsInExpression() {
+            switch (token()) {
+                case 19 /* OpenParenToken */: // foo<x>(
+                // this case are the only case where this token can legally follow a type argument
+                // list.  So we definitely want to treat this as a type arg list.
+                case 23 /* DotToken */: // foo<x>.
+                case 20 /* CloseParenToken */: // foo<x>)
+                case 22 /* CloseBracketToken */: // foo<x>]
+                case 56 /* ColonToken */: // foo<x>:
+                case 25 /* SemicolonToken */: // foo<x>;
+                case 55 /* QuestionToken */: // foo<x>?
+                case 32 /* EqualsEqualsToken */: // foo<x> ==
+                case 34 /* EqualsEqualsEqualsToken */: // foo<x> ===
+                case 33 /* ExclamationEqualsToken */: // foo<x> !=
+                case 35 /* ExclamationEqualsEqualsToken */: // foo<x> !==
+                case 53 /* AmpersandAmpersandToken */: // foo<x> &&
+                case 54 /* BarBarToken */: // foo<x> ||
+                case 50 /* CaretToken */: // foo<x> ^
+                case 48 /* AmpersandToken */: // foo<x> &
+                case 49 /* BarToken */: // foo<x> |
+                case 18 /* CloseBraceToken */: // foo<x> }
+                case 1 /* EndOfFileToken */:
+                    // these cases can't legally follow a type arg list.  However, they're not legal
+                    // expressions either.  The user is probably in the middle of a generic type. So
+                    // treat it as such.
+                    return true;
+                case 26 /* CommaToken */: // foo<x>,
+                case 17 /* OpenBraceToken */: // foo<x> {
+                // We don't want to treat these as type arguments.  Otherwise we'll parse this
+                // as an invocation expression.  Instead, we want to parse out the expression
+                // in isolation from the type arguments.
+                default:
+                    // Anything else treat as an expression.
+                    return false;
+            }
         }
-        return node;
-    }
-    ts.updateWith = updateWith;
-    function createSwitch(expression, caseBlock, location) {
-        var node = createNode(213 /* SwitchStatement */, location);
-        node.expression = parenthesizeExpressionForList(expression);
-        node.caseBlock = caseBlock;
-        return node;
-    }
-    ts.createSwitch = createSwitch;
-    function updateSwitch(node, expression, caseBlock) {
-        if (node.expression !== expression || node.caseBlock !== caseBlock) {
-            return updateNode(createSwitch(expression, caseBlock, node), node);
+        function parsePrimaryExpression() {
+            switch (token()) {
+                case 8 /* NumericLiteral */:
+                case 9 /* StringLiteral */:
+                case 13 /* NoSubstitutionTemplateLiteral */:
+                    return parseLiteralNode();
+                case 99 /* ThisKeyword */:
+                case 97 /* SuperKeyword */:
+                case 95 /* NullKeyword */:
+                case 101 /* TrueKeyword */:
+                case 86 /* FalseKeyword */:
+                    return parseTokenNode();
+                case 19 /* OpenParenToken */:
+                    return parseParenthesizedExpression();
+                case 21 /* OpenBracketToken */:
+                    return parseArrayLiteralExpression();
+                case 17 /* OpenBraceToken */:
+                    return parseObjectLiteralExpression();
+                case 120 /* AsyncKeyword */:
+                    // Async arrow functions are parsed earlier in parseAssignmentExpressionOrHigher.
+                    // If we encounter `async [no LineTerminator here] function` then this is an async
+                    // function; otherwise, its an identifier.
+                    if (!lookAhead(nextTokenIsFunctionKeywordOnSameLine)) {
+                        break;
+                    }
+                    return parseFunctionExpression();
+                case 75 /* ClassKeyword */:
+                    return parseClassExpression();
+                case 89 /* FunctionKeyword */:
+                    return parseFunctionExpression();
+                case 94 /* NewKeyword */:
+                    return parseNewExpression();
+                case 41 /* SlashToken */:
+                case 63 /* SlashEqualsToken */:
+                    if (reScanSlashToken() === 12 /* RegularExpressionLiteral */) {
+                        return parseLiteralNode();
+                    }
+                    break;
+                case 14 /* TemplateHead */:
+                    return parseTemplateExpression();
+            }
+            return parseIdentifier(ts.Diagnostics.Expression_expected);
         }
-        return node;
-    }
-    ts.updateSwitch = updateSwitch;
-    function createLabel(label, statement, location) {
-        var node = createNode(214 /* LabeledStatement */, location);
-        node.label = typeof label === "string" ? createIdentifier(label) : label;
-        node.statement = statement;
-        return node;
-    }
-    ts.createLabel = createLabel;
-    function updateLabel(node, label, statement) {
-        if (node.label !== label || node.statement !== statement) {
-            return updateNode(createLabel(label, statement, node), node);
+        function parseParenthesizedExpression() {
+            var node = createNode(185 /* ParenthesizedExpression */);
+            parseExpected(19 /* OpenParenToken */);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(20 /* CloseParenToken */);
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateLabel = updateLabel;
-    function createThrow(expression, location) {
-        var node = createNode(215 /* ThrowStatement */, location);
-        node.expression = expression;
-        return node;
-    }
-    ts.createThrow = createThrow;
-    function updateThrow(node, expression) {
-        if (node.expression !== expression) {
-            return updateNode(createThrow(expression, node), node);
+        function parseSpreadElement() {
+            var node = createNode(198 /* SpreadElement */);
+            parseExpected(24 /* DotDotDotToken */);
+            node.expression = parseAssignmentExpressionOrHigher();
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateThrow = updateThrow;
-    function createTry(tryBlock, catchClause, finallyBlock, location) {
-        var node = createNode(216 /* TryStatement */, location);
-        node.tryBlock = tryBlock;
-        node.catchClause = catchClause;
-        node.finallyBlock = finallyBlock;
-        return node;
-    }
-    ts.createTry = createTry;
-    function updateTry(node, tryBlock, catchClause, finallyBlock) {
-        if (node.tryBlock !== tryBlock || node.catchClause !== catchClause || node.finallyBlock !== finallyBlock) {
-            return updateNode(createTry(tryBlock, catchClause, finallyBlock, node), node);
+        function parseArgumentOrArrayLiteralElement() {
+            return token() === 24 /* DotDotDotToken */ ? parseSpreadElement() :
+                token() === 26 /* CommaToken */ ? createNode(200 /* OmittedExpression */) :
+                    parseAssignmentExpressionOrHigher();
         }
-        return node;
-    }
-    ts.updateTry = updateTry;
-    function createCaseBlock(clauses, location) {
-        var node = createNode(227 /* CaseBlock */, location);
-        node.clauses = createNodeArray(clauses);
-        return node;
-    }
-    ts.createCaseBlock = createCaseBlock;
-    function updateCaseBlock(node, clauses) {
-        if (node.clauses !== clauses) {
-            return updateNode(createCaseBlock(clauses, node), node);
+        function parseArgumentExpression() {
+            return doOutsideOfContext(disallowInAndDecoratorContext, parseArgumentOrArrayLiteralElement);
         }
-        return node;
-    }
-    ts.updateCaseBlock = updateCaseBlock;
-    function createFunctionDeclaration(decorators, modifiers, asteriskToken, name, typeParameters, parameters, type, body, location, flags) {
-        var node = createNode(220 /* FunctionDeclaration */, location, flags);
-        node.decorators = decorators ? createNodeArray(decorators) : undefined;
-        node.modifiers = modifiers ? createNodeArray(modifiers) : undefined;
-        node.asteriskToken = asteriskToken;
-        node.name = typeof name === "string" ? createIdentifier(name) : name;
-        node.typeParameters = typeParameters ? createNodeArray(typeParameters) : undefined;
-        node.parameters = createNodeArray(parameters);
-        node.type = type;
-        node.body = body;
-        return node;
-    }
-    ts.createFunctionDeclaration = createFunctionDeclaration;
-    function updateFunctionDeclaration(node, decorators, modifiers, name, typeParameters, parameters, type, body) {
-        if (node.decorators !== decorators || node.modifiers !== modifiers || node.name !== name || node.typeParameters !== typeParameters || node.parameters !== parameters || node.type !== type || node.body !== body) {
-            return updateNode(createFunctionDeclaration(decorators, modifiers, node.asteriskToken, name, typeParameters, parameters, type, body, /*location*/ node, node.flags), node);
+        function parseArrayLiteralExpression() {
+            var node = createNode(177 /* ArrayLiteralExpression */);
+            parseExpected(21 /* OpenBracketToken */);
+            if (scanner.hasPrecedingLineBreak()) {
+                node.multiLine = true;
+            }
+            node.elements = parseDelimitedList(15 /* ArrayLiteralMembers */, parseArgumentOrArrayLiteralElement);
+            parseExpected(22 /* CloseBracketToken */);
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateFunctionDeclaration = updateFunctionDeclaration;
-    function createClassDeclaration(decorators, modifiers, name, typeParameters, heritageClauses, members, location) {
-        var node = createNode(221 /* ClassDeclaration */, location);
-        node.decorators = decorators ? createNodeArray(decorators) : undefined;
-        node.modifiers = modifiers ? createNodeArray(modifiers) : undefined;
-        node.name = name;
-        node.typeParameters = typeParameters ? createNodeArray(typeParameters) : undefined;
-        node.heritageClauses = createNodeArray(heritageClauses);
-        node.members = createNodeArray(members);
-        return node;
-    }
-    ts.createClassDeclaration = createClassDeclaration;
-    function updateClassDeclaration(node, decorators, modifiers, name, typeParameters, heritageClauses, members) {
-        if (node.decorators !== decorators || node.modifiers !== modifiers || node.name !== name || node.typeParameters !== typeParameters || node.heritageClauses !== heritageClauses || node.members !== members) {
-            return updateNode(createClassDeclaration(decorators, modifiers, name, typeParameters, heritageClauses, members, node), node);
+        function tryParseAccessorDeclaration(fullStart, decorators, modifiers) {
+            if (parseContextualModifier(125 /* GetKeyword */)) {
+                return parseAccessorDeclaration(153 /* GetAccessor */, fullStart, decorators, modifiers);
+            }
+            else if (parseContextualModifier(135 /* SetKeyword */)) {
+                return parseAccessorDeclaration(154 /* SetAccessor */, fullStart, decorators, modifiers);
+            }
+            return undefined;
         }
-        return node;
-    }
-    ts.updateClassDeclaration = updateClassDeclaration;
-    function createImportDeclaration(decorators, modifiers, importClause, moduleSpecifier, location) {
-        var node = createNode(230 /* ImportDeclaration */, location);
-        node.decorators = decorators ? createNodeArray(decorators) : undefined;
-        node.modifiers = modifiers ? createNodeArray(modifiers) : undefined;
-        node.importClause = importClause;
-        node.moduleSpecifier = moduleSpecifier;
-        return node;
-    }
-    ts.createImportDeclaration = createImportDeclaration;
-    function updateImportDeclaration(node, decorators, modifiers, importClause, moduleSpecifier) {
-        if (node.decorators !== decorators || node.modifiers !== modifiers || node.importClause !== importClause || node.moduleSpecifier !== moduleSpecifier) {
-            return updateNode(createImportDeclaration(decorators, modifiers, importClause, moduleSpecifier, node), node);
+        function parseObjectLiteralElement() {
+            var fullStart = scanner.getStartPos();
+            var dotDotDotToken = parseOptionalToken(24 /* DotDotDotToken */);
+            if (dotDotDotToken) {
+                var spreadElement = createNode(263 /* SpreadAssignment */, fullStart);
+                spreadElement.expression = parseAssignmentExpressionOrHigher();
+                return addJSDocComment(finishNode(spreadElement));
+            }
+            var decorators = parseDecorators();
+            var modifiers = parseModifiers();
+            var accessor = tryParseAccessorDeclaration(fullStart, decorators, modifiers);
+            if (accessor) {
+                return accessor;
+            }
+            var asteriskToken = parseOptionalToken(39 /* AsteriskToken */);
+            var tokenIsIdentifier = isIdentifier();
+            var propertyName = parsePropertyName();
+            // Disallowing of optional property assignments happens in the grammar checker.
+            var questionToken = parseOptionalToken(55 /* QuestionToken */);
+            if (asteriskToken || token() === 19 /* OpenParenToken */ || token() === 27 /* LessThanToken */) {
+                return parseMethodDeclaration(fullStart, decorators, modifiers, asteriskToken, propertyName, questionToken);
+            }
+            // check if it is short-hand property assignment or normal property assignment
+            // NOTE: if token is EqualsToken it is interpreted as CoverInitializedName production
+            // CoverInitializedName[Yield] :
+            //     IdentifierReference[?Yield] Initializer[In, ?Yield]
+            // this is necessary because ObjectLiteral productions are also used to cover grammar for ObjectAssignmentPattern
+            var isShorthandPropertyAssignment = tokenIsIdentifier && (token() === 26 /* CommaToken */ || token() === 18 /* CloseBraceToken */ || token() === 58 /* EqualsToken */);
+            if (isShorthandPropertyAssignment) {
+                var shorthandDeclaration = createNode(262 /* ShorthandPropertyAssignment */, fullStart);
+                shorthandDeclaration.name = propertyName;
+                shorthandDeclaration.questionToken = questionToken;
+                var equalsToken = parseOptionalToken(58 /* EqualsToken */);
+                if (equalsToken) {
+                    shorthandDeclaration.equalsToken = equalsToken;
+                    shorthandDeclaration.objectAssignmentInitializer = allowInAnd(parseAssignmentExpressionOrHigher);
+                }
+                return addJSDocComment(finishNode(shorthandDeclaration));
+            }
+            else {
+                var propertyAssignment = createNode(261 /* PropertyAssignment */, fullStart);
+                propertyAssignment.modifiers = modifiers;
+                propertyAssignment.name = propertyName;
+                propertyAssignment.questionToken = questionToken;
+                parseExpected(56 /* ColonToken */);
+                propertyAssignment.initializer = allowInAnd(parseAssignmentExpressionOrHigher);
+                return addJSDocComment(finishNode(propertyAssignment));
+            }
         }
-        return node;
-    }
-    ts.updateImportDeclaration = updateImportDeclaration;
-    function createImportClause(name, namedBindings, location) {
-        var node = createNode(231 /* ImportClause */, location);
-        node.name = name;
-        node.namedBindings = namedBindings;
-        return node;
-    }
-    ts.createImportClause = createImportClause;
-    function updateImportClause(node, name, namedBindings) {
-        if (node.name !== name || node.namedBindings !== namedBindings) {
-            return updateNode(createImportClause(name, namedBindings, node), node);
+        function parseObjectLiteralExpression() {
+            var node = createNode(178 /* ObjectLiteralExpression */);
+            parseExpected(17 /* OpenBraceToken */);
+            if (scanner.hasPrecedingLineBreak()) {
+                node.multiLine = true;
+            }
+            node.properties = parseDelimitedList(12 /* ObjectLiteralMembers */, parseObjectLiteralElement, /*considerSemicolonAsDelimiter*/ true);
+            parseExpected(18 /* CloseBraceToken */);
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateImportClause = updateImportClause;
-    function createNamespaceImport(name, location) {
-        var node = createNode(232 /* NamespaceImport */, location);
-        node.name = name;
-        return node;
-    }
-    ts.createNamespaceImport = createNamespaceImport;
-    function updateNamespaceImport(node, name) {
-        if (node.name !== name) {
-            return updateNode(createNamespaceImport(name, node), node);
+        function parseFunctionExpression() {
+            // GeneratorExpression:
+            //      function* BindingIdentifier [Yield][opt](FormalParameters[Yield]){ GeneratorBody }
+            //
+            // FunctionExpression:
+            //      function BindingIdentifier[opt](FormalParameters){ FunctionBody }
+            var saveDecoratorContext = inDecoratorContext();
+            if (saveDecoratorContext) {
+                setDecoratorContext(/*val*/ false);
+            }
+            var node = createNode(186 /* FunctionExpression */);
+            node.modifiers = parseModifiers();
+            parseExpected(89 /* FunctionKeyword */);
+            node.asteriskToken = parseOptionalToken(39 /* AsteriskToken */);
+            var isGenerator = !!node.asteriskToken;
+            var isAsync = !!(ts.getModifierFlags(node) & 256 /* Async */);
+            node.name =
+                isGenerator && isAsync ? doInYieldAndAwaitContext(parseOptionalIdentifier) :
+                    isGenerator ? doInYieldContext(parseOptionalIdentifier) :
+                        isAsync ? doInAwaitContext(parseOptionalIdentifier) :
+                            parseOptionalIdentifier();
+            fillSignature(56 /* ColonToken */, /*yieldContext*/ isGenerator, /*awaitContext*/ isAsync, /*requireCompleteParameterList*/ false, node);
+            node.body = parseFunctionBlock(/*allowYield*/ isGenerator, /*allowAwait*/ isAsync, /*ignoreMissingOpenBrace*/ false);
+            if (saveDecoratorContext) {
+                setDecoratorContext(/*val*/ true);
+            }
+            return addJSDocComment(finishNode(node));
         }
-        return node;
-    }
-    ts.updateNamespaceImport = updateNamespaceImport;
-    function createNamedImports(elements, location) {
-        var node = createNode(233 /* NamedImports */, location);
-        node.elements = createNodeArray(elements);
-        return node;
-    }
-    ts.createNamedImports = createNamedImports;
-    function updateNamedImports(node, elements) {
-        if (node.elements !== elements) {
-            return updateNode(createNamedImports(elements, node), node);
+        function parseOptionalIdentifier() {
+            return isIdentifier() ? parseIdentifier() : undefined;
         }
-        return node;
-    }
-    ts.updateNamedImports = updateNamedImports;
-    function createImportSpecifier(propertyName, name, location) {
-        var node = createNode(234 /* ImportSpecifier */, location);
-        node.propertyName = propertyName;
-        node.name = name;
-        return node;
-    }
-    ts.createImportSpecifier = createImportSpecifier;
-    function updateImportSpecifier(node, propertyName, name) {
-        if (node.propertyName !== propertyName || node.name !== name) {
-            return updateNode(createImportSpecifier(propertyName, name, node), node);
+        function parseNewExpression() {
+            var fullStart = scanner.getStartPos();
+            parseExpected(94 /* NewKeyword */);
+            if (parseOptional(23 /* DotToken */)) {
+                var node_1 = createNode(204 /* MetaProperty */, fullStart);
+                node_1.keywordToken = 94 /* NewKeyword */;
+                node_1.name = parseIdentifierName();
+                return finishNode(node_1);
+            }
+            var node = createNode(182 /* NewExpression */, fullStart);
+            node.expression = parseMemberExpressionOrHigher();
+            node.typeArguments = tryParse(parseTypeArgumentsInExpression);
+            if (node.typeArguments || token() === 19 /* OpenParenToken */) {
+                node.arguments = parseArgumentList();
+            }
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateImportSpecifier = updateImportSpecifier;
-    function createExportAssignment(decorators, modifiers, isExportEquals, expression, location) {
-        var node = createNode(235 /* ExportAssignment */, location);
-        node.decorators = decorators ? createNodeArray(decorators) : undefined;
-        node.modifiers = modifiers ? createNodeArray(modifiers) : undefined;
-        node.isExportEquals = isExportEquals;
-        node.expression = expression;
-        return node;
-    }
-    ts.createExportAssignment = createExportAssignment;
-    function updateExportAssignment(node, decorators, modifiers, expression) {
-        if (node.decorators !== decorators || node.modifiers !== modifiers || node.expression !== expression) {
-            return updateNode(createExportAssignment(decorators, modifiers, node.isExportEquals, expression, node), node);
+        // STATEMENTS
+        function parseBlock(ignoreMissingOpenBrace, diagnosticMessage) {
+            var node = createNode(207 /* Block */);
+            if (parseExpected(17 /* OpenBraceToken */, diagnosticMessage) || ignoreMissingOpenBrace) {
+                if (scanner.hasPrecedingLineBreak()) {
+                    node.multiLine = true;
+                }
+                node.statements = parseList(1 /* BlockStatements */, parseStatement);
+                parseExpected(18 /* CloseBraceToken */);
+            }
+            else {
+                node.statements = createMissingList();
+            }
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateExportAssignment = updateExportAssignment;
-    function createExportDeclaration(decorators, modifiers, exportClause, moduleSpecifier, location) {
-        var node = createNode(236 /* ExportDeclaration */, location);
-        node.decorators = decorators ? createNodeArray(decorators) : undefined;
-        node.modifiers = modifiers ? createNodeArray(modifiers) : undefined;
-        node.exportClause = exportClause;
-        node.moduleSpecifier = moduleSpecifier;
-        return node;
-    }
-    ts.createExportDeclaration = createExportDeclaration;
-    function updateExportDeclaration(node, decorators, modifiers, exportClause, moduleSpecifier) {
-        if (node.decorators !== decorators || node.modifiers !== modifiers || node.exportClause !== exportClause || node.moduleSpecifier !== moduleSpecifier) {
-            return updateNode(createExportDeclaration(decorators, modifiers, exportClause, moduleSpecifier, node), node);
+        function parseFunctionBlock(allowYield, allowAwait, ignoreMissingOpenBrace, diagnosticMessage) {
+            var savedYieldContext = inYieldContext();
+            setYieldContext(allowYield);
+            var savedAwaitContext = inAwaitContext();
+            setAwaitContext(allowAwait);
+            // We may be in a [Decorator] context when parsing a function expression or
+            // arrow function. The body of the function is not in [Decorator] context.
+            var saveDecoratorContext = inDecoratorContext();
+            if (saveDecoratorContext) {
+                setDecoratorContext(/*val*/ false);
+            }
+            var block = parseBlock(ignoreMissingOpenBrace, diagnosticMessage);
+            if (saveDecoratorContext) {
+                setDecoratorContext(/*val*/ true);
+            }
+            setYieldContext(savedYieldContext);
+            setAwaitContext(savedAwaitContext);
+            return block;
         }
-        return node;
-    }
-    ts.updateExportDeclaration = updateExportDeclaration;
-    function createNamedExports(elements, location) {
-        var node = createNode(237 /* NamedExports */, location);
-        node.elements = createNodeArray(elements);
-        return node;
-    }
-    ts.createNamedExports = createNamedExports;
-    function updateNamedExports(node, elements) {
-        if (node.elements !== elements) {
-            return updateNode(createNamedExports(elements, node), node);
+        function parseEmptyStatement() {
+            var node = createNode(209 /* EmptyStatement */);
+            parseExpected(25 /* SemicolonToken */);
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateNamedExports = updateNamedExports;
-    function createExportSpecifier(name, propertyName, location) {
-        var node = createNode(238 /* ExportSpecifier */, location);
-        node.name = typeof name === "string" ? createIdentifier(name) : name;
-        node.propertyName = typeof propertyName === "string" ? createIdentifier(propertyName) : propertyName;
-        return node;
-    }
-    ts.createExportSpecifier = createExportSpecifier;
-    function updateExportSpecifier(node, name, propertyName) {
-        if (node.name !== name || node.propertyName !== propertyName) {
-            return updateNode(createExportSpecifier(name, propertyName, node), node);
+        function parseIfStatement() {
+            var node = createNode(211 /* IfStatement */);
+            parseExpected(90 /* IfKeyword */);
+            parseExpected(19 /* OpenParenToken */);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(20 /* CloseParenToken */);
+            node.thenStatement = parseStatement();
+            node.elseStatement = parseOptional(82 /* ElseKeyword */) ? parseStatement() : undefined;
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateExportSpecifier = updateExportSpecifier;
-    // JSX
-    function createJsxElement(openingElement, children, closingElement, location) {
-        var node = createNode(241 /* JsxElement */, location);
-        node.openingElement = openingElement;
-        node.children = createNodeArray(children);
-        node.closingElement = closingElement;
-        return node;
-    }
-    ts.createJsxElement = createJsxElement;
-    function updateJsxElement(node, openingElement, children, closingElement) {
-        if (node.openingElement !== openingElement || node.children !== children || node.closingElement !== closingElement) {
-            return updateNode(createJsxElement(openingElement, children, closingElement, node), node);
+        function parseDoStatement() {
+            var node = createNode(212 /* DoStatement */);
+            parseExpected(81 /* DoKeyword */);
+            node.statement = parseStatement();
+            parseExpected(106 /* WhileKeyword */);
+            parseExpected(19 /* OpenParenToken */);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(20 /* CloseParenToken */);
+            // From: https://mail.mozilla.org/pipermail/es-discuss/2011-August/016188.html
+            // 157 min --- All allen at wirfs-brock.com CONF --- "do{;}while(false)false" prohibited in
+            // spec but allowed in consensus reality. Approved -- this is the de-facto standard whereby
+            //  do;while(0)x will have a semicolon inserted before x.
+            parseOptional(25 /* SemicolonToken */);
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateJsxElement = updateJsxElement;
-    function createJsxSelfClosingElement(tagName, attributes, location) {
-        var node = createNode(242 /* JsxSelfClosingElement */, location);
-        node.tagName = tagName;
-        node.attributes = createNodeArray(attributes);
-        return node;
-    }
-    ts.createJsxSelfClosingElement = createJsxSelfClosingElement;
-    function updateJsxSelfClosingElement(node, tagName, attributes) {
-        if (node.tagName !== tagName || node.attributes !== attributes) {
-            return updateNode(createJsxSelfClosingElement(tagName, attributes, node), node);
+        function parseWhileStatement() {
+            var node = createNode(213 /* WhileStatement */);
+            parseExpected(106 /* WhileKeyword */);
+            parseExpected(19 /* OpenParenToken */);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(20 /* CloseParenToken */);
+            node.statement = parseStatement();
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateJsxSelfClosingElement = updateJsxSelfClosingElement;
-    function createJsxOpeningElement(tagName, attributes, location) {
-        var node = createNode(243 /* JsxOpeningElement */, location);
-        node.tagName = tagName;
-        node.attributes = createNodeArray(attributes);
-        return node;
-    }
-    ts.createJsxOpeningElement = createJsxOpeningElement;
-    function updateJsxOpeningElement(node, tagName, attributes) {
-        if (node.tagName !== tagName || node.attributes !== attributes) {
-            return updateNode(createJsxOpeningElement(tagName, attributes, node), node);
+        function parseForOrForInOrForOfStatement() {
+            var pos = getNodePos();
+            parseExpected(88 /* ForKeyword */);
+            var awaitToken = parseOptionalToken(121 /* AwaitKeyword */);
+            parseExpected(19 /* OpenParenToken */);
+            var initializer = undefined;
+            if (token() !== 25 /* SemicolonToken */) {
+                if (token() === 104 /* VarKeyword */ || token() === 110 /* LetKeyword */ || token() === 76 /* ConstKeyword */) {
+                    initializer = parseVariableDeclarationList(/*inForStatementInitializer*/ true);
+                }
+                else {
+                    initializer = disallowInAnd(parseExpression);
+                }
+            }
+            var forOrForInOrForOfStatement;
+            if (awaitToken ? parseExpected(142 /* OfKeyword */) : parseOptional(142 /* OfKeyword */)) {
+                var forOfStatement = createNode(216 /* ForOfStatement */, pos);
+                forOfStatement.awaitModifier = awaitToken;
+                forOfStatement.initializer = initializer;
+                forOfStatement.expression = allowInAnd(parseAssignmentExpressionOrHigher);
+                parseExpected(20 /* CloseParenToken */);
+                forOrForInOrForOfStatement = forOfStatement;
+            }
+            else if (parseOptional(92 /* InKeyword */)) {
+                var forInStatement = createNode(215 /* ForInStatement */, pos);
+                forInStatement.initializer = initializer;
+                forInStatement.expression = allowInAnd(parseExpression);
+                parseExpected(20 /* CloseParenToken */);
+                forOrForInOrForOfStatement = forInStatement;
+            }
+            else {
+                var forStatement = createNode(214 /* ForStatement */, pos);
+                forStatement.initializer = initializer;
+                parseExpected(25 /* SemicolonToken */);
+                if (token() !== 25 /* SemicolonToken */ && token() !== 20 /* CloseParenToken */) {
+                    forStatement.condition = allowInAnd(parseExpression);
+                }
+                parseExpected(25 /* SemicolonToken */);
+                if (token() !== 20 /* CloseParenToken */) {
+                    forStatement.incrementor = allowInAnd(parseExpression);
+                }
+                parseExpected(20 /* CloseParenToken */);
+                forOrForInOrForOfStatement = forStatement;
+            }
+            forOrForInOrForOfStatement.statement = parseStatement();
+            return finishNode(forOrForInOrForOfStatement);
         }
-        return node;
-    }
-    ts.updateJsxOpeningElement = updateJsxOpeningElement;
-    function createJsxClosingElement(tagName, location) {
-        var node = createNode(245 /* JsxClosingElement */, location);
-        node.tagName = tagName;
-        return node;
-    }
-    ts.createJsxClosingElement = createJsxClosingElement;
-    function updateJsxClosingElement(node, tagName) {
-        if (node.tagName !== tagName) {
-            return updateNode(createJsxClosingElement(tagName, node), node);
+        function parseBreakOrContinueStatement(kind) {
+            var node = createNode(kind);
+            parseExpected(kind === 218 /* BreakStatement */ ? 72 /* BreakKeyword */ : 77 /* ContinueKeyword */);
+            if (!canParseSemicolon()) {
+                node.label = parseIdentifier();
+            }
+            parseSemicolon();
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateJsxClosingElement = updateJsxClosingElement;
-    function createJsxAttribute(name, initializer, location) {
-        var node = createNode(246 /* JsxAttribute */, location);
-        node.name = name;
-        node.initializer = initializer;
-        return node;
-    }
-    ts.createJsxAttribute = createJsxAttribute;
-    function updateJsxAttribute(node, name, initializer) {
-        if (node.name !== name || node.initializer !== initializer) {
-            return updateNode(createJsxAttribute(name, initializer, node), node);
+        function parseReturnStatement() {
+            var node = createNode(219 /* ReturnStatement */);
+            parseExpected(96 /* ReturnKeyword */);
+            if (!canParseSemicolon()) {
+                node.expression = allowInAnd(parseExpression);
+            }
+            parseSemicolon();
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateJsxAttribute = updateJsxAttribute;
-    function createJsxSpreadAttribute(expression, location) {
-        var node = createNode(247 /* JsxSpreadAttribute */, location);
-        node.expression = expression;
-        return node;
-    }
-    ts.createJsxSpreadAttribute = createJsxSpreadAttribute;
-    function updateJsxSpreadAttribute(node, expression) {
-        if (node.expression !== expression) {
-            return updateNode(createJsxSpreadAttribute(expression, node), node);
+        function parseWithStatement() {
+            var node = createNode(220 /* WithStatement */);
+            parseExpected(107 /* WithKeyword */);
+            parseExpected(19 /* OpenParenToken */);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(20 /* CloseParenToken */);
+            node.statement = parseStatement();
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateJsxSpreadAttribute = updateJsxSpreadAttribute;
-    function createJsxExpression(expression, location) {
-        var node = createNode(248 /* JsxExpression */, location);
-        node.expression = expression;
-        return node;
-    }
-    ts.createJsxExpression = createJsxExpression;
-    function updateJsxExpression(node, expression) {
-        if (node.expression !== expression) {
-            return updateNode(createJsxExpression(expression, node), node);
+        function parseCaseClause() {
+            var node = createNode(257 /* CaseClause */);
+            parseExpected(73 /* CaseKeyword */);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(56 /* ColonToken */);
+            node.statements = parseList(3 /* SwitchClauseStatements */, parseStatement);
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateJsxExpression = updateJsxExpression;
-    // Clauses
-    function createHeritageClause(token, types, location) {
-        var node = createNode(251 /* HeritageClause */, location);
-        node.token = token;
-        node.types = createNodeArray(types);
-        return node;
-    }
-    ts.createHeritageClause = createHeritageClause;
-    function updateHeritageClause(node, types) {
-        if (node.types !== types) {
-            return updateNode(createHeritageClause(node.token, types, node), node);
+        function parseDefaultClause() {
+            var node = createNode(258 /* DefaultClause */);
+            parseExpected(79 /* DefaultKeyword */);
+            parseExpected(56 /* ColonToken */);
+            node.statements = parseList(3 /* SwitchClauseStatements */, parseStatement);
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateHeritageClause = updateHeritageClause;
-    function createCaseClause(expression, statements, location) {
-        var node = createNode(249 /* CaseClause */, location);
-        node.expression = parenthesizeExpressionForList(expression);
-        node.statements = createNodeArray(statements);
-        return node;
-    }
-    ts.createCaseClause = createCaseClause;
-    function updateCaseClause(node, expression, statements) {
-        if (node.expression !== expression || node.statements !== statements) {
-            return updateNode(createCaseClause(expression, statements, node), node);
+        function parseCaseOrDefaultClause() {
+            return token() === 73 /* CaseKeyword */ ? parseCaseClause() : parseDefaultClause();
         }
-        return node;
-    }
-    ts.updateCaseClause = updateCaseClause;
-    function createDefaultClause(statements, location) {
-        var node = createNode(250 /* DefaultClause */, location);
-        node.statements = createNodeArray(statements);
-        return node;
-    }
-    ts.createDefaultClause = createDefaultClause;
-    function updateDefaultClause(node, statements) {
-        if (node.statements !== statements) {
-            return updateNode(createDefaultClause(statements, node), node);
+        function parseSwitchStatement() {
+            var node = createNode(221 /* SwitchStatement */);
+            parseExpected(98 /* SwitchKeyword */);
+            parseExpected(19 /* OpenParenToken */);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(20 /* CloseParenToken */);
+            var caseBlock = createNode(235 /* CaseBlock */, scanner.getStartPos());
+            parseExpected(17 /* OpenBraceToken */);
+            caseBlock.clauses = parseList(2 /* SwitchClauses */, parseCaseOrDefaultClause);
+            parseExpected(18 /* CloseBraceToken */);
+            node.caseBlock = finishNode(caseBlock);
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateDefaultClause = updateDefaultClause;
-    function createCatchClause(variableDeclaration, block, location) {
-        var node = createNode(252 /* CatchClause */, location);
-        node.variableDeclaration = typeof variableDeclaration === "string" ? createVariableDeclaration(variableDeclaration) : variableDeclaration;
-        node.block = block;
-        return node;
-    }
-    ts.createCatchClause = createCatchClause;
-    function updateCatchClause(node, variableDeclaration, block) {
-        if (node.variableDeclaration !== variableDeclaration || node.block !== block) {
-            return updateNode(createCatchClause(variableDeclaration, block, node), node);
+        function parseThrowStatement() {
+            // ThrowStatement[Yield] :
+            //      throw [no LineTerminator here]Expression[In, ?Yield];
+            // Because of automatic semicolon insertion, we need to report error if this
+            // throw could be terminated with a semicolon.  Note: we can't call 'parseExpression'
+            // directly as that might consume an expression on the following line.
+            // We just return 'undefined' in that case.  The actual error will be reported in the
+            // grammar walker.
+            var node = createNode(223 /* ThrowStatement */);
+            parseExpected(100 /* ThrowKeyword */);
+            node.expression = scanner.hasPrecedingLineBreak() ? undefined : allowInAnd(parseExpression);
+            parseSemicolon();
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateCatchClause = updateCatchClause;
-    // Property assignments
-    function createPropertyAssignment(name, initializer, location) {
-        var node = createNode(253 /* PropertyAssignment */, location);
-        node.name = typeof name === "string" ? createIdentifier(name) : name;
-        node.questionToken = undefined;
-        node.initializer = initializer !== undefined ? parenthesizeExpressionForList(initializer) : undefined;
-        return node;
-    }
-    ts.createPropertyAssignment = createPropertyAssignment;
-    function updatePropertyAssignment(node, name, initializer) {
-        if (node.name !== name || node.initializer !== initializer) {
-            return updateNode(createPropertyAssignment(name, initializer, node), node);
+        // TODO: Review for error recovery
+        function parseTryStatement() {
+            var node = createNode(224 /* TryStatement */);
+            parseExpected(102 /* TryKeyword */);
+            node.tryBlock = parseBlock(/*ignoreMissingOpenBrace*/ false);
+            node.catchClause = token() === 74 /* CatchKeyword */ ? parseCatchClause() : undefined;
+            // If we don't have a catch clause, then we must have a finally clause.  Try to parse
+            // one out no matter what.
+            if (!node.catchClause || token() === 87 /* FinallyKeyword */) {
+                parseExpected(87 /* FinallyKeyword */);
+                node.finallyBlock = parseBlock(/*ignoreMissingOpenBrace*/ false);
+            }
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updatePropertyAssignment = updatePropertyAssignment;
-    function createShorthandPropertyAssignment(name, objectAssignmentInitializer, location) {
-        var node = createNode(254 /* ShorthandPropertyAssignment */, location);
-        node.name = typeof name === "string" ? createIdentifier(name) : name;
-        node.objectAssignmentInitializer = objectAssignmentInitializer !== undefined ? parenthesizeExpressionForList(objectAssignmentInitializer) : undefined;
-        return node;
-    }
-    ts.createShorthandPropertyAssignment = createShorthandPropertyAssignment;
-    function updateShorthandPropertyAssignment(node, name, objectAssignmentInitializer) {
-        if (node.name !== name || node.objectAssignmentInitializer !== objectAssignmentInitializer) {
-            return updateNode(createShorthandPropertyAssignment(name, objectAssignmentInitializer, node), node);
+        function parseCatchClause() {
+            var result = createNode(260 /* CatchClause */);
+            parseExpected(74 /* CatchKeyword */);
+            if (parseExpected(19 /* OpenParenToken */)) {
+                result.variableDeclaration = parseVariableDeclaration();
+            }
+            parseExpected(20 /* CloseParenToken */);
+            result.block = parseBlock(/*ignoreMissingOpenBrace*/ false);
+            return finishNode(result);
         }
-        return node;
-    }
-    ts.updateShorthandPropertyAssignment = updateShorthandPropertyAssignment;
-    // Top-level nodes
-    function updateSourceFileNode(node, statements) {
-        if (node.statements !== statements) {
-            var updated = createNode(256 /* SourceFile */, /*location*/ node, node.flags);
-            updated.statements = createNodeArray(statements);
-            updated.endOfFileToken = node.endOfFileToken;
-            updated.fileName = node.fileName;
-            updated.path = node.path;
-            updated.text = node.text;
-            if (node.amdDependencies !== undefined)
-                updated.amdDependencies = node.amdDependencies;
-            if (node.moduleName !== undefined)
-                updated.moduleName = node.moduleName;
-            if (node.referencedFiles !== undefined)
-                updated.referencedFiles = node.referencedFiles;
-            if (node.typeReferenceDirectives !== undefined)
-                updated.typeReferenceDirectives = node.typeReferenceDirectives;
-            if (node.languageVariant !== undefined)
-                updated.languageVariant = node.languageVariant;
-            if (node.isDeclarationFile !== undefined)
-                updated.isDeclarationFile = node.isDeclarationFile;
-            if (node.renamedDependencies !== undefined)
-                updated.renamedDependencies = node.renamedDependencies;
-            if (node.hasNoDefaultLib !== undefined)
-                updated.hasNoDefaultLib = node.hasNoDefaultLib;
-            if (node.languageVersion !== undefined)
-                updated.languageVersion = node.languageVersion;
-            if (node.scriptKind !== undefined)
-                updated.scriptKind = node.scriptKind;
-            if (node.externalModuleIndicator !== undefined)
-                updated.externalModuleIndicator = node.externalModuleIndicator;
-            if (node.commonJsModuleIndicator !== undefined)
-                updated.commonJsModuleIndicator = node.commonJsModuleIndicator;
-            if (node.identifiers !== undefined)
-                updated.identifiers = node.identifiers;
-            if (node.nodeCount !== undefined)
-                updated.nodeCount = node.nodeCount;
-            if (node.identifierCount !== undefined)
-                updated.identifierCount = node.identifierCount;
-            if (node.symbolCount !== undefined)
-                updated.symbolCount = node.symbolCount;
-            if (node.parseDiagnostics !== undefined)
-                updated.parseDiagnostics = node.parseDiagnostics;
-            if (node.bindDiagnostics !== undefined)
-                updated.bindDiagnostics = node.bindDiagnostics;
-            if (node.lineMap !== undefined)
-                updated.lineMap = node.lineMap;
-            if (node.classifiableNames !== undefined)
-                updated.classifiableNames = node.classifiableNames;
-            if (node.resolvedModules !== undefined)
-                updated.resolvedModules = node.resolvedModules;
-            if (node.resolvedTypeReferenceDirectiveNames !== undefined)
-                updated.resolvedTypeReferenceDirectiveNames = node.resolvedTypeReferenceDirectiveNames;
-            if (node.imports !== undefined)
-                updated.imports = node.imports;
-            if (node.moduleAugmentations !== undefined)
-                updated.moduleAugmentations = node.moduleAugmentations;
-            if (node.externalHelpersModuleName !== undefined)
-                updated.externalHelpersModuleName = node.externalHelpersModuleName;
-            return updateNode(updated, node);
+        function parseDebuggerStatement() {
+            var node = createNode(225 /* DebuggerStatement */);
+            parseExpected(78 /* DebuggerKeyword */);
+            parseSemicolon();
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.updateSourceFileNode = updateSourceFileNode;
-    // Transformation nodes
-    /**
-     * Creates a synthetic statement to act as a placeholder for a not-emitted statement in
-     * order to preserve comments.
-     *
-     * @param original The original statement.
-     */
-    function createNotEmittedStatement(original) {
-        var node = createNode(287 /* NotEmittedStatement */, /*location*/ original);
-        node.original = original;
-        return node;
-    }
-    ts.createNotEmittedStatement = createNotEmittedStatement;
-    /**
-     * Creates a synthetic expression to act as a placeholder for a not-emitted expression in
-     * order to preserve comments or sourcemap positions.
-     *
-     * @param expression The inner expression to emit.
-     * @param original The original outer expression.
-     * @param location The location for the expression. Defaults to the positions from "original" if provided.
-     */
-    function createPartiallyEmittedExpression(expression, original, location) {
-        var node = createNode(288 /* PartiallyEmittedExpression */, /*location*/ location || original);
-        node.expression = expression;
-        node.original = original;
-        return node;
-    }
-    ts.createPartiallyEmittedExpression = createPartiallyEmittedExpression;
-    function updatePartiallyEmittedExpression(node, expression) {
-        if (node.expression !== expression) {
-            return updateNode(createPartiallyEmittedExpression(expression, node.original, node), node);
+        function parseExpressionOrLabeledStatement() {
+            // Avoiding having to do the lookahead for a labeled statement by just trying to parse
+            // out an expression, seeing if it is identifier and then seeing if it is followed by
+            // a colon.
+            var fullStart = scanner.getStartPos();
+            var expression = allowInAnd(parseExpression);
+            if (expression.kind === 71 /* Identifier */ && parseOptional(56 /* ColonToken */)) {
+                var labeledStatement = createNode(222 /* LabeledStatement */, fullStart);
+                labeledStatement.label = expression;
+                labeledStatement.statement = parseStatement();
+                return addJSDocComment(finishNode(labeledStatement));
+            }
+            else {
+                var expressionStatement = createNode(210 /* ExpressionStatement */, fullStart);
+                expressionStatement.expression = expression;
+                parseSemicolon();
+                return addJSDocComment(finishNode(expressionStatement));
+            }
         }
-        return node;
-    }
-    ts.updatePartiallyEmittedExpression = updatePartiallyEmittedExpression;
-    // Compound nodes
-    function createComma(left, right) {
-        return createBinary(left, 24 /* CommaToken */, right);
-    }
-    ts.createComma = createComma;
-    function createLessThan(left, right, location) {
-        return createBinary(left, 25 /* LessThanToken */, right, location);
-    }
-    ts.createLessThan = createLessThan;
-    function createAssignment(left, right, location) {
-        return createBinary(left, 56 /* EqualsToken */, right, location);
-    }
-    ts.createAssignment = createAssignment;
-    function createStrictEquality(left, right) {
-        return createBinary(left, 32 /* EqualsEqualsEqualsToken */, right);
-    }
-    ts.createStrictEquality = createStrictEquality;
-    function createStrictInequality(left, right) {
-        return createBinary(left, 33 /* ExclamationEqualsEqualsToken */, right);
-    }
-    ts.createStrictInequality = createStrictInequality;
-    function createAdd(left, right) {
-        return createBinary(left, 35 /* PlusToken */, right);
-    }
-    ts.createAdd = createAdd;
-    function createSubtract(left, right) {
-        return createBinary(left, 36 /* MinusToken */, right);
-    }
-    ts.createSubtract = createSubtract;
-    function createPostfixIncrement(operand, location) {
-        return createPostfix(operand, 41 /* PlusPlusToken */, location);
-    }
-    ts.createPostfixIncrement = createPostfixIncrement;
-    function createLogicalAnd(left, right) {
-        return createBinary(left, 51 /* AmpersandAmpersandToken */, right);
-    }
-    ts.createLogicalAnd = createLogicalAnd;
-    function createLogicalOr(left, right) {
-        return createBinary(left, 52 /* BarBarToken */, right);
-    }
-    ts.createLogicalOr = createLogicalOr;
-    function createLogicalNot(operand) {
-        return createPrefix(49 /* ExclamationToken */, operand);
-    }
-    ts.createLogicalNot = createLogicalNot;
-    function createVoidZero() {
-        return createVoid(createLiteral(0));
-    }
-    ts.createVoidZero = createVoidZero;
-    function createMemberAccessForPropertyName(target, memberName, location) {
-        if (ts.isComputedPropertyName(memberName)) {
-            return createElementAccess(target, memberName.expression, location);
+        function nextTokenIsIdentifierOrKeywordOnSameLine() {
+            nextToken();
+            return ts.tokenIsIdentifierOrKeyword(token()) && !scanner.hasPrecedingLineBreak();
         }
-        else {
-            var expression = ts.isIdentifier(memberName) ? createPropertyAccess(target, memberName, location) : createElementAccess(target, memberName, location);
-            (expression.emitNode || (expression.emitNode = {})).flags |= 2048 /* NoNestedSourceMaps */;
-            return expression;
+        function nextTokenIsClassKeywordOnSameLine() {
+            nextToken();
+            return token() === 75 /* ClassKeyword */ && !scanner.hasPrecedingLineBreak();
         }
-    }
-    ts.createMemberAccessForPropertyName = createMemberAccessForPropertyName;
-    function createRestParameter(name) {
-        return createParameterDeclaration(
-        /*decorators*/ undefined, 
-        /*modifiers*/ undefined, createSynthesizedNode(22 /* DotDotDotToken */), name, 
-        /*questionToken*/ undefined, 
-        /*type*/ undefined, 
-        /*initializer*/ undefined);
-    }
-    ts.createRestParameter = createRestParameter;
-    function createFunctionCall(func, thisArg, argumentsList, location) {
-        return createCall(createPropertyAccess(func, "call"), 
-        /*typeArguments*/ undefined, [
-            thisArg
-        ].concat(argumentsList), location);
-    }
-    ts.createFunctionCall = createFunctionCall;
-    function createFunctionApply(func, thisArg, argumentsExpression, location) {
-        return createCall(createPropertyAccess(func, "apply"), 
-        /*typeArguments*/ undefined, [
-            thisArg,
-            argumentsExpression
-        ], location);
-    }
-    ts.createFunctionApply = createFunctionApply;
-    function createArraySlice(array, start) {
-        var argumentsList = [];
-        if (start !== undefined) {
-            argumentsList.push(typeof start === "number" ? createLiteral(start) : start);
+        function nextTokenIsFunctionKeywordOnSameLine() {
+            nextToken();
+            return token() === 89 /* FunctionKeyword */ && !scanner.hasPrecedingLineBreak();
         }
-        return createCall(createPropertyAccess(array, "slice"), /*typeArguments*/ undefined, argumentsList);
-    }
-    ts.createArraySlice = createArraySlice;
-    function createArrayConcat(array, values) {
-        return createCall(createPropertyAccess(array, "concat"), 
-        /*typeArguments*/ undefined, values);
-    }
-    ts.createArrayConcat = createArrayConcat;
-    function createMathPow(left, right, location) {
-        return createCall(createPropertyAccess(createIdentifier("Math"), "pow"), 
-        /*typeArguments*/ undefined, [left, right], location);
-    }
-    ts.createMathPow = createMathPow;
-    function createReactNamespace(reactNamespace, parent) {
-        // To ensure the emit resolver can properly resolve the namespace, we need to
-        // treat this identifier as if it were a source tree node by clearing the `Synthesized`
-        // flag and setting a parent node.
-        var react = createIdentifier(reactNamespace || "React");
-        react.flags &= ~8 /* Synthesized */;
-        react.parent = parent;
-        return react;
-    }
-    function createReactCreateElement(reactNamespace, tagName, props, children, parentElement, location) {
-        var argumentsList = [tagName];
-        if (props) {
-            argumentsList.push(props);
+        function nextTokenIsIdentifierOrKeywordOrLiteralOnSameLine() {
+            nextToken();
+            return (ts.tokenIsIdentifierOrKeyword(token()) || token() === 8 /* NumericLiteral */ || token() === 9 /* StringLiteral */) && !scanner.hasPrecedingLineBreak();
         }
-        if (children && children.length > 0) {
-            if (!props) {
-                argumentsList.push(createNull());
-            }
-            if (children.length > 1) {
-                for (var _i = 0, children_1 = children; _i < children_1.length; _i++) {
-                    var child = children_1[_i];
-                    child.startsOnNewLine = true;
-                    argumentsList.push(child);
+        function isDeclaration() {
+            while (true) {
+                switch (token()) {
+                    case 104 /* VarKeyword */:
+                    case 110 /* LetKeyword */:
+                    case 76 /* ConstKeyword */:
+                    case 89 /* FunctionKeyword */:
+                    case 75 /* ClassKeyword */:
+                    case 83 /* EnumKeyword */:
+                        return true;
+                    // 'declare', 'module', 'namespace', 'interface'* and 'type' are all legal JavaScript identifiers;
+                    // however, an identifier cannot be followed by another identifier on the same line. This is what we
+                    // count on to parse out the respective declarations. For instance, we exploit this to say that
+                    //
+                    //    namespace n
+                    //
+                    // can be none other than the beginning of a namespace declaration, but need to respect that JavaScript sees
+                    //
+                    //    namespace
+                    //    n
+                    //
+                    // as the identifier 'namespace' on one line followed by the identifier 'n' on another.
+                    // We need to look one token ahead to see if it permissible to try parsing a declaration.
+                    //
+                    // *Note*: 'interface' is actually a strict mode reserved word. So while
+                    //
+                    //   "use strict"
+                    //   interface
+                    //   I {}
+                    //
+                    // could be legal, it would add complexity for very little gain.
+                    case 109 /* InterfaceKeyword */:
+                    case 138 /* TypeKeyword */:
+                        return nextTokenIsIdentifierOnSameLine();
+                    case 128 /* ModuleKeyword */:
+                    case 129 /* NamespaceKeyword */:
+                        return nextTokenIsIdentifierOrStringLiteralOnSameLine();
+                    case 117 /* AbstractKeyword */:
+                    case 120 /* AsyncKeyword */:
+                    case 124 /* DeclareKeyword */:
+                    case 112 /* PrivateKeyword */:
+                    case 113 /* ProtectedKeyword */:
+                    case 114 /* PublicKeyword */:
+                    case 131 /* ReadonlyKeyword */:
+                        nextToken();
+                        // ASI takes effect for this modifier.
+                        if (scanner.hasPrecedingLineBreak()) {
+                            return false;
+                        }
+                        continue;
+                    case 141 /* GlobalKeyword */:
+                        nextToken();
+                        return token() === 17 /* OpenBraceToken */ || token() === 71 /* Identifier */ || token() === 84 /* ExportKeyword */;
+                    case 91 /* ImportKeyword */:
+                        nextToken();
+                        return token() === 9 /* StringLiteral */ || token() === 39 /* AsteriskToken */ ||
+                            token() === 17 /* OpenBraceToken */ || ts.tokenIsIdentifierOrKeyword(token());
+                    case 84 /* ExportKeyword */:
+                        nextToken();
+                        if (token() === 58 /* EqualsToken */ || token() === 39 /* AsteriskToken */ ||
+                            token() === 17 /* OpenBraceToken */ || token() === 79 /* DefaultKeyword */ ||
+                            token() === 118 /* AsKeyword */) {
+                            return true;
+                        }
+                        continue;
+                    case 115 /* StaticKeyword */:
+                        nextToken();
+                        continue;
+                    default:
+                        return false;
                 }
             }
-            else {
-                argumentsList.push(children[0]);
-            }
         }
-        return createCall(createPropertyAccess(createReactNamespace(reactNamespace, parentElement), "createElement"), 
-        /*typeArguments*/ undefined, argumentsList, location);
-    }
-    ts.createReactCreateElement = createReactCreateElement;
-    function createLetDeclarationList(declarations, location) {
-        return createVariableDeclarationList(declarations, location, 1 /* Let */);
-    }
-    ts.createLetDeclarationList = createLetDeclarationList;
-    function createConstDeclarationList(declarations, location) {
-        return createVariableDeclarationList(declarations, location, 2 /* Const */);
-    }
-    ts.createConstDeclarationList = createConstDeclarationList;
-    // Helpers
-    function createHelperName(externalHelpersModuleName, name) {
-        return externalHelpersModuleName
-            ? createPropertyAccess(externalHelpersModuleName, name)
-            : createIdentifier(name);
-    }
-    ts.createHelperName = createHelperName;
-    function createExtendsHelper(externalHelpersModuleName, name) {
-        return createCall(createHelperName(externalHelpersModuleName, "__extends"), 
-        /*typeArguments*/ undefined, [
-            name,
-            createIdentifier("_super")
-        ]);
-    }
-    ts.createExtendsHelper = createExtendsHelper;
-    function createAssignHelper(externalHelpersModuleName, attributesSegments) {
-        return createCall(createHelperName(externalHelpersModuleName, "__assign"), 
-        /*typeArguments*/ undefined, attributesSegments);
-    }
-    ts.createAssignHelper = createAssignHelper;
-    function createParamHelper(externalHelpersModuleName, expression, parameterOffset, location) {
-        return createCall(createHelperName(externalHelpersModuleName, "__param"), 
-        /*typeArguments*/ undefined, [
-            createLiteral(parameterOffset),
-            expression
-        ], location);
-    }
-    ts.createParamHelper = createParamHelper;
-    function createMetadataHelper(externalHelpersModuleName, metadataKey, metadataValue) {
-        return createCall(createHelperName(externalHelpersModuleName, "__metadata"), 
-        /*typeArguments*/ undefined, [
-            createLiteral(metadataKey),
-            metadataValue
-        ]);
-    }
-    ts.createMetadataHelper = createMetadataHelper;
-    function createDecorateHelper(externalHelpersModuleName, decoratorExpressions, target, memberName, descriptor, location) {
-        var argumentsArray = [];
-        argumentsArray.push(createArrayLiteral(decoratorExpressions, /*location*/ undefined, /*multiLine*/ true));
-        argumentsArray.push(target);
-        if (memberName) {
-            argumentsArray.push(memberName);
-            if (descriptor) {
-                argumentsArray.push(descriptor);
-            }
+        function isStartOfDeclaration() {
+            return lookAhead(isDeclaration);
         }
-        return createCall(createHelperName(externalHelpersModuleName, "__decorate"), /*typeArguments*/ undefined, argumentsArray, location);
-    }
-    ts.createDecorateHelper = createDecorateHelper;
-    function createAwaiterHelper(externalHelpersModuleName, hasLexicalArguments, promiseConstructor, body) {
-        var generatorFunc = createFunctionExpression(createNode(37 /* AsteriskToken */), 
-        /*name*/ undefined, 
-        /*typeParameters*/ undefined, 
-        /*parameters*/ [], 
-        /*type*/ undefined, body);
-        // Mark this node as originally an async function
-        (generatorFunc.emitNode || (generatorFunc.emitNode = {})).flags |= 2097152 /* AsyncFunctionBody */;
-        return createCall(createHelperName(externalHelpersModuleName, "__awaiter"), 
-        /*typeArguments*/ undefined, [
-            createThis(),
-            hasLexicalArguments ? createIdentifier("arguments") : createVoidZero(),
-            promiseConstructor ? createExpressionFromEntityName(promiseConstructor) : createVoidZero(),
-            generatorFunc
-        ]);
-    }
-    ts.createAwaiterHelper = createAwaiterHelper;
-    function createHasOwnProperty(target, propertyName) {
-        return createCall(createPropertyAccess(target, "hasOwnProperty"), 
-        /*typeArguments*/ undefined, [propertyName]);
-    }
-    ts.createHasOwnProperty = createHasOwnProperty;
-    function createObjectCreate(prototype) {
-        return createCall(createPropertyAccess(createIdentifier("Object"), "create"), 
-        /*typeArguments*/ undefined, [prototype]);
-    }
-    function createGeti(target) {
-        // name => super[name]
-        return createArrowFunction(
-        /*modifiers*/ undefined, 
-        /*typeParameters*/ undefined, [createParameter("name")], 
-        /*type*/ undefined, 
-        /*equalsGreaterThanToken*/ undefined, createElementAccess(target, createIdentifier("name")));
-    }
-    function createSeti(target) {
-        // (name, value) => super[name] = value
-        return createArrowFunction(
-        /*modifiers*/ undefined, 
-        /*typeParameters*/ undefined, [
-            createParameter("name"),
-            createParameter("value")
-        ], 
-        /*type*/ undefined, 
-        /*equalsGreaterThanToken*/ undefined, createAssignment(createElementAccess(target, createIdentifier("name")), createIdentifier("value")));
-    }
-    function createAdvancedAsyncSuperHelper() {
-        //  const _super = (function (geti, seti) {
-        //      const cache = Object.create(null);
-        //      return name => cache[name] || (cache[name] = { get value() { return geti(name); }, set value(v) { seti(name, v); } });
-        //  })(name => super[name], (name, value) => super[name] = value);
-        // const cache = Object.create(null);
-        var createCache = createVariableStatement(
-        /*modifiers*/ undefined, createConstDeclarationList([
-            createVariableDeclaration("cache", 
-            /*type*/ undefined, createObjectCreate(createNull()))
-        ]));
-        // get value() { return geti(name); }
-        var getter = createGetAccessor(
-        /*decorators*/ undefined, 
-        /*modifiers*/ undefined, "value", 
-        /*parameters*/ [], 
-        /*type*/ undefined, createBlock([
-            createReturn(createCall(createIdentifier("geti"), 
-            /*typeArguments*/ undefined, [createIdentifier("name")]))
-        ]));
-        // set value(v) { seti(name, v); }
-        var setter = createSetAccessor(
-        /*decorators*/ undefined, 
-        /*modifiers*/ undefined, "value", [createParameter("v")], createBlock([
-            createStatement(createCall(createIdentifier("seti"), 
-            /*typeArguments*/ undefined, [
-                createIdentifier("name"),
-                createIdentifier("v")
-            ]))
-        ]));
-        // return name => cache[name] || ...
-        var getOrCreateAccessorsForName = createReturn(createArrowFunction(
-        /*modifiers*/ undefined, 
-        /*typeParameters*/ undefined, [createParameter("name")], 
-        /*type*/ undefined, 
-        /*equalsGreaterThanToken*/ undefined, createLogicalOr(createElementAccess(createIdentifier("cache"), createIdentifier("name")), createParen(createAssignment(createElementAccess(createIdentifier("cache"), createIdentifier("name")), createObjectLiteral([
-            getter,
-            setter
-        ]))))));
-        //  const _super = (function (geti, seti) {
-        //      const cache = Object.create(null);
-        //      return name => cache[name] || (cache[name] = { get value() { return geti(name); }, set value(v) { seti(name, v); } });
-        //  })(name => super[name], (name, value) => super[name] = value);
-        return createVariableStatement(
-        /*modifiers*/ undefined, createConstDeclarationList([
-            createVariableDeclaration("_super", 
-            /*type*/ undefined, createCall(createParen(createFunctionExpression(
-            /*asteriskToken*/ undefined, 
-            /*name*/ undefined, 
-            /*typeParameters*/ undefined, [
-                createParameter("geti"),
-                createParameter("seti")
-            ], 
-            /*type*/ undefined, createBlock([
-                createCache,
-                getOrCreateAccessorsForName
-            ]))), 
-            /*typeArguments*/ undefined, [
-                createGeti(createSuper()),
-                createSeti(createSuper())
-            ]))
-        ]));
-    }
-    ts.createAdvancedAsyncSuperHelper = createAdvancedAsyncSuperHelper;
-    function createSimpleAsyncSuperHelper() {
-        return createVariableStatement(
-        /*modifiers*/ undefined, createConstDeclarationList([
-            createVariableDeclaration("_super", 
-            /*type*/ undefined, createGeti(createSuper()))
-        ]));
-    }
-    ts.createSimpleAsyncSuperHelper = createSimpleAsyncSuperHelper;
-    function shouldBeCapturedInTempVariable(node, cacheIdentifiers) {
-        var target = skipParentheses(node);
-        switch (target.kind) {
-            case 69 /* Identifier */:
-                return cacheIdentifiers;
-            case 97 /* ThisKeyword */:
-            case 8 /* NumericLiteral */:
-            case 9 /* StringLiteral */:
-                return false;
-            case 170 /* ArrayLiteralExpression */:
-                var elements = target.elements;
-                if (elements.length === 0) {
-                    return false;
-                }
-                return true;
-            case 171 /* ObjectLiteralExpression */:
-                return target.properties.length > 0;
-            default:
-                return true;
+        function isStartOfStatement() {
+            switch (token()) {
+                case 57 /* AtToken */:
+                case 25 /* SemicolonToken */:
+                case 17 /* OpenBraceToken */:
+                case 104 /* VarKeyword */:
+                case 110 /* LetKeyword */:
+                case 89 /* FunctionKeyword */:
+                case 75 /* ClassKeyword */:
+                case 83 /* EnumKeyword */:
+                case 90 /* IfKeyword */:
+                case 81 /* DoKeyword */:
+                case 106 /* WhileKeyword */:
+                case 88 /* ForKeyword */:
+                case 77 /* ContinueKeyword */:
+                case 72 /* BreakKeyword */:
+                case 96 /* ReturnKeyword */:
+                case 107 /* WithKeyword */:
+                case 98 /* SwitchKeyword */:
+                case 100 /* ThrowKeyword */:
+                case 102 /* TryKeyword */:
+                case 78 /* DebuggerKeyword */:
+                // 'catch' and 'finally' do not actually indicate that the code is part of a statement,
+                // however, we say they are here so that we may gracefully parse them and error later.
+                case 74 /* CatchKeyword */:
+                case 87 /* FinallyKeyword */:
+                    return true;
+                case 91 /* ImportKeyword */:
+                    return isStartOfDeclaration() || lookAhead(nextTokenIsOpenParenOrLessThan);
+                case 76 /* ConstKeyword */:
+                case 84 /* ExportKeyword */:
+                    return isStartOfDeclaration();
+                case 120 /* AsyncKeyword */:
+                case 124 /* DeclareKeyword */:
+                case 109 /* InterfaceKeyword */:
+                case 128 /* ModuleKeyword */:
+                case 129 /* NamespaceKeyword */:
+                case 138 /* TypeKeyword */:
+                case 141 /* GlobalKeyword */:
+                    // When these don't start a declaration, they're an identifier in an expression statement
+                    return true;
+                case 114 /* PublicKeyword */:
+                case 112 /* PrivateKeyword */:
+                case 113 /* ProtectedKeyword */:
+                case 115 /* StaticKeyword */:
+                case 131 /* ReadonlyKeyword */:
+                    // When these don't start a declaration, they may be the start of a class member if an identifier
+                    // immediately follows. Otherwise they're an identifier in an expression statement.
+                    return isStartOfDeclaration() || !lookAhead(nextTokenIsIdentifierOrKeywordOnSameLine);
+                default:
+                    return isStartOfExpression();
+            }
         }
-    }
-    function createCallBinding(expression, recordTempVariable, languageVersion, cacheIdentifiers) {
-        var callee = skipOuterExpressions(expression, 7 /* All */);
-        var thisArg;
-        var target;
-        if (ts.isSuperProperty(callee)) {
-            thisArg = createThis();
-            target = callee;
+        function nextTokenIsIdentifierOrStartOfDestructuring() {
+            nextToken();
+            return isIdentifier() || token() === 17 /* OpenBraceToken */ || token() === 21 /* OpenBracketToken */;
         }
-        else if (callee.kind === 95 /* SuperKeyword */) {
-            thisArg = createThis();
-            target = languageVersion < 2 /* ES6 */ ? createIdentifier("_super", /*location*/ callee) : callee;
+        function isLetDeclaration() {
+            // In ES6 'let' always starts a lexical declaration if followed by an identifier or {
+            // or [.
+            return lookAhead(nextTokenIsIdentifierOrStartOfDestructuring);
         }
-        else {
-            switch (callee.kind) {
-                case 172 /* PropertyAccessExpression */: {
-                    if (shouldBeCapturedInTempVariable(callee.expression, cacheIdentifiers)) {
-                        // for `a.b()` target is `(_a = a).b` and thisArg is `_a`
-                        thisArg = createTempVariable(recordTempVariable);
-                        target = createPropertyAccess(createAssignment(thisArg, callee.expression, 
-                        /*location*/ callee.expression), callee.name, 
-                        /*location*/ callee);
+        function parseStatement() {
+            switch (token()) {
+                case 25 /* SemicolonToken */:
+                    return parseEmptyStatement();
+                case 17 /* OpenBraceToken */:
+                    return parseBlock(/*ignoreMissingOpenBrace*/ false);
+                case 104 /* VarKeyword */:
+                    return parseVariableStatement(scanner.getStartPos(), /*decorators*/ undefined, /*modifiers*/ undefined);
+                case 110 /* LetKeyword */:
+                    if (isLetDeclaration()) {
+                        return parseVariableStatement(scanner.getStartPos(), /*decorators*/ undefined, /*modifiers*/ undefined);
                     }
-                    else {
-                        thisArg = callee.expression;
-                        target = callee;
+                    break;
+                case 89 /* FunctionKeyword */:
+                    return parseFunctionDeclaration(scanner.getStartPos(), /*decorators*/ undefined, /*modifiers*/ undefined);
+                case 75 /* ClassKeyword */:
+                    return parseClassDeclaration(scanner.getStartPos(), /*decorators*/ undefined, /*modifiers*/ undefined);
+                case 90 /* IfKeyword */:
+                    return parseIfStatement();
+                case 81 /* DoKeyword */:
+                    return parseDoStatement();
+                case 106 /* WhileKeyword */:
+                    return parseWhileStatement();
+                case 88 /* ForKeyword */:
+                    return parseForOrForInOrForOfStatement();
+                case 77 /* ContinueKeyword */:
+                    return parseBreakOrContinueStatement(217 /* ContinueStatement */);
+                case 72 /* BreakKeyword */:
+                    return parseBreakOrContinueStatement(218 /* BreakStatement */);
+                case 96 /* ReturnKeyword */:
+                    return parseReturnStatement();
+                case 107 /* WithKeyword */:
+                    return parseWithStatement();
+                case 98 /* SwitchKeyword */:
+                    return parseSwitchStatement();
+                case 100 /* ThrowKeyword */:
+                    return parseThrowStatement();
+                case 102 /* TryKeyword */:
+                // Include 'catch' and 'finally' for error recovery.
+                case 74 /* CatchKeyword */:
+                case 87 /* FinallyKeyword */:
+                    return parseTryStatement();
+                case 78 /* DebuggerKeyword */:
+                    return parseDebuggerStatement();
+                case 57 /* AtToken */:
+                    return parseDeclaration();
+                case 120 /* AsyncKeyword */:
+                case 109 /* InterfaceKeyword */:
+                case 138 /* TypeKeyword */:
+                case 128 /* ModuleKeyword */:
+                case 129 /* NamespaceKeyword */:
+                case 124 /* DeclareKeyword */:
+                case 76 /* ConstKeyword */:
+                case 83 /* EnumKeyword */:
+                case 84 /* ExportKeyword */:
+                case 91 /* ImportKeyword */:
+                case 112 /* PrivateKeyword */:
+                case 113 /* ProtectedKeyword */:
+                case 114 /* PublicKeyword */:
+                case 117 /* AbstractKeyword */:
+                case 115 /* StaticKeyword */:
+                case 131 /* ReadonlyKeyword */:
+                case 141 /* GlobalKeyword */:
+                    if (isStartOfDeclaration()) {
+                        return parseDeclaration();
                     }
                     break;
-                }
-                case 173 /* ElementAccessExpression */: {
-                    if (shouldBeCapturedInTempVariable(callee.expression, cacheIdentifiers)) {
-                        // for `a[b]()` target is `(_a = a)[b]` and thisArg is `_a`
-                        thisArg = createTempVariable(recordTempVariable);
-                        target = createElementAccess(createAssignment(thisArg, callee.expression, 
-                        /*location*/ callee.expression), callee.argumentExpression, 
-                        /*location*/ callee);
+            }
+            return parseExpressionOrLabeledStatement();
+        }
+        function parseDeclaration() {
+            var fullStart = getNodePos();
+            var decorators = parseDecorators();
+            var modifiers = parseModifiers();
+            switch (token()) {
+                case 104 /* VarKeyword */:
+                case 110 /* LetKeyword */:
+                case 76 /* ConstKeyword */:
+                    return parseVariableStatement(fullStart, decorators, modifiers);
+                case 89 /* FunctionKeyword */:
+                    return parseFunctionDeclaration(fullStart, decorators, modifiers);
+                case 75 /* ClassKeyword */:
+                    return parseClassDeclaration(fullStart, decorators, modifiers);
+                case 109 /* InterfaceKeyword */:
+                    return parseInterfaceDeclaration(fullStart, decorators, modifiers);
+                case 138 /* TypeKeyword */:
+                    return parseTypeAliasDeclaration(fullStart, decorators, modifiers);
+                case 83 /* EnumKeyword */:
+                    return parseEnumDeclaration(fullStart, decorators, modifiers);
+                case 141 /* GlobalKeyword */:
+                case 128 /* ModuleKeyword */:
+                case 129 /* NamespaceKeyword */:
+                    return parseModuleDeclaration(fullStart, decorators, modifiers);
+                case 91 /* ImportKeyword */:
+                    return parseImportDeclarationOrImportEqualsDeclaration(fullStart, decorators, modifiers);
+                case 84 /* ExportKeyword */:
+                    nextToken();
+                    switch (token()) {
+                        case 79 /* DefaultKeyword */:
+                        case 58 /* EqualsToken */:
+                            return parseExportAssignment(fullStart, decorators, modifiers);
+                        case 118 /* AsKeyword */:
+                            return parseNamespaceExportDeclaration(fullStart, decorators, modifiers);
+                        default:
+                            return parseExportDeclaration(fullStart, decorators, modifiers);
                     }
-                    else {
-                        thisArg = callee.expression;
-                        target = callee;
+                default:
+                    if (decorators || modifiers) {
+                        // We reached this point because we encountered decorators and/or modifiers and assumed a declaration
+                        // would follow. For recovery and error reporting purposes, return an incomplete declaration.
+                        var node = createMissingNode(247 /* MissingDeclaration */, /*reportAtCurrentPosition*/ true, ts.Diagnostics.Declaration_expected);
+                        node.pos = fullStart;
+                        node.decorators = decorators;
+                        node.modifiers = modifiers;
+                        return finishNode(node);
                     }
-                    break;
-                }
-                default: {
-                    // for `a()` target is `a` and thisArg is `void 0`
-                    thisArg = createVoidZero();
-                    target = parenthesizeForAccess(expression);
-                    break;
-                }
             }
         }
-        return { target: target, thisArg: thisArg };
-    }
-    ts.createCallBinding = createCallBinding;
-    function inlineExpressions(expressions) {
-        return ts.reduceLeft(expressions, createComma);
-    }
-    ts.inlineExpressions = inlineExpressions;
-    function createExpressionFromEntityName(node) {
-        if (ts.isQualifiedName(node)) {
-            var left = createExpressionFromEntityName(node.left);
-            var right = getMutableClone(node.right);
-            return createPropertyAccess(left, right, /*location*/ node);
+        function nextTokenIsIdentifierOrStringLiteralOnSameLine() {
+            nextToken();
+            return !scanner.hasPrecedingLineBreak() && (isIdentifier() || token() === 9 /* StringLiteral */);
         }
-        else {
-            return getMutableClone(node);
+        function parseFunctionBlockOrSemicolon(isGenerator, isAsync, diagnosticMessage) {
+            if (token() !== 17 /* OpenBraceToken */ && canParseSemicolon()) {
+                parseSemicolon();
+                return;
+            }
+            return parseFunctionBlock(isGenerator, isAsync, /*ignoreMissingOpenBrace*/ false, diagnosticMessage);
         }
-    }
-    ts.createExpressionFromEntityName = createExpressionFromEntityName;
-    function createExpressionForPropertyName(memberName) {
-        if (ts.isIdentifier(memberName)) {
-            return createLiteral(memberName, /*location*/ undefined);
+        // DECLARATIONS
+        function parseArrayBindingElement() {
+            if (token() === 26 /* CommaToken */) {
+                return createNode(200 /* OmittedExpression */);
+            }
+            var node = createNode(176 /* BindingElement */);
+            node.dotDotDotToken = parseOptionalToken(24 /* DotDotDotToken */);
+            node.name = parseIdentifierOrPattern();
+            node.initializer = parseBindingElementInitializer(/*inParameter*/ false);
+            return finishNode(node);
         }
-        else if (ts.isComputedPropertyName(memberName)) {
-            return getMutableClone(memberName.expression);
+        function parseObjectBindingElement() {
+            var node = createNode(176 /* BindingElement */);
+            node.dotDotDotToken = parseOptionalToken(24 /* DotDotDotToken */);
+            var tokenIsIdentifier = isIdentifier();
+            var propertyName = parsePropertyName();
+            if (tokenIsIdentifier && token() !== 56 /* ColonToken */) {
+                node.name = propertyName;
+            }
+            else {
+                parseExpected(56 /* ColonToken */);
+                node.propertyName = propertyName;
+                node.name = parseIdentifierOrPattern();
+            }
+            node.initializer = parseBindingElementInitializer(/*inParameter*/ false);
+            return finishNode(node);
         }
-        else {
-            return getMutableClone(memberName);
+        function parseObjectBindingPattern() {
+            var node = createNode(174 /* ObjectBindingPattern */);
+            parseExpected(17 /* OpenBraceToken */);
+            node.elements = parseDelimitedList(9 /* ObjectBindingElements */, parseObjectBindingElement);
+            parseExpected(18 /* CloseBraceToken */);
+            return finishNode(node);
         }
-    }
-    ts.createExpressionForPropertyName = createExpressionForPropertyName;
-    function createExpressionForObjectLiteralElementLike(node, property, receiver) {
-        switch (property.kind) {
-            case 149 /* GetAccessor */:
-            case 150 /* SetAccessor */:
-                return createExpressionForAccessorDeclaration(node.properties, property, receiver, node.multiLine);
-            case 253 /* PropertyAssignment */:
-                return createExpressionForPropertyAssignment(property, receiver);
-            case 254 /* ShorthandPropertyAssignment */:
-                return createExpressionForShorthandPropertyAssignment(property, receiver);
-            case 147 /* MethodDeclaration */:
-                return createExpressionForMethodDeclaration(property, receiver);
+        function parseArrayBindingPattern() {
+            var node = createNode(175 /* ArrayBindingPattern */);
+            parseExpected(21 /* OpenBracketToken */);
+            node.elements = parseDelimitedList(10 /* ArrayBindingElements */, parseArrayBindingElement);
+            parseExpected(22 /* CloseBracketToken */);
+            return finishNode(node);
         }
-    }
-    ts.createExpressionForObjectLiteralElementLike = createExpressionForObjectLiteralElementLike;
-    function createExpressionForAccessorDeclaration(properties, property, receiver, multiLine) {
-        var _a = ts.getAllAccessorDeclarations(properties, property), firstAccessor = _a.firstAccessor, getAccessor = _a.getAccessor, setAccessor = _a.setAccessor;
-        if (property === firstAccessor) {
-            var properties_1 = [];
-            if (getAccessor) {
-                var getterFunction = createFunctionExpression(
-                /*asteriskToken*/ undefined, 
-                /*name*/ undefined, 
-                /*typeParameters*/ undefined, getAccessor.parameters, 
-                /*type*/ undefined, getAccessor.body, 
-                /*location*/ getAccessor);
-                setOriginalNode(getterFunction, getAccessor);
-                var getter = createPropertyAssignment("get", getterFunction);
-                properties_1.push(getter);
+        function isIdentifierOrPattern() {
+            return token() === 17 /* OpenBraceToken */ || token() === 21 /* OpenBracketToken */ || isIdentifier();
+        }
+        function parseIdentifierOrPattern() {
+            if (token() === 21 /* OpenBracketToken */) {
+                return parseArrayBindingPattern();
             }
-            if (setAccessor) {
-                var setterFunction = createFunctionExpression(
-                /*asteriskToken*/ undefined, 
-                /*name*/ undefined, 
-                /*typeParameters*/ undefined, setAccessor.parameters, 
-                /*type*/ undefined, setAccessor.body, 
-                /*location*/ setAccessor);
-                setOriginalNode(setterFunction, setAccessor);
-                var setter = createPropertyAssignment("set", setterFunction);
-                properties_1.push(setter);
-            }
-            properties_1.push(createPropertyAssignment("enumerable", createLiteral(true)));
-            properties_1.push(createPropertyAssignment("configurable", createLiteral(true)));
-            var expression = createCall(createPropertyAccess(createIdentifier("Object"), "defineProperty"), 
-            /*typeArguments*/ undefined, [
-                receiver,
-                createExpressionForPropertyName(property.name),
-                createObjectLiteral(properties_1, /*location*/ undefined, multiLine)
-            ], 
-            /*location*/ firstAccessor);
-            return ts.aggregateTransformFlags(expression);
+            if (token() === 17 /* OpenBraceToken */) {
+                return parseObjectBindingPattern();
+            }
+            return parseIdentifier();
         }
-        return undefined;
-    }
-    function createExpressionForPropertyAssignment(property, receiver) {
-        return ts.aggregateTransformFlags(setOriginalNode(createAssignment(createMemberAccessForPropertyName(receiver, property.name, /*location*/ property.name), property.initializer, 
-        /*location*/ property), 
-        /*original*/ property));
-    }
-    function createExpressionForShorthandPropertyAssignment(property, receiver) {
-        return ts.aggregateTransformFlags(setOriginalNode(createAssignment(createMemberAccessForPropertyName(receiver, property.name, /*location*/ property.name), getSynthesizedClone(property.name), 
-        /*location*/ property), 
-        /*original*/ property));
-    }
-    function createExpressionForMethodDeclaration(method, receiver) {
-        return ts.aggregateTransformFlags(setOriginalNode(createAssignment(createMemberAccessForPropertyName(receiver, method.name, /*location*/ method.name), setOriginalNode(createFunctionExpression(method.asteriskToken, 
-        /*name*/ undefined, 
-        /*typeParameters*/ undefined, method.parameters, 
-        /*type*/ undefined, method.body, 
-        /*location*/ method), 
-        /*original*/ method), 
-        /*location*/ method), 
-        /*original*/ method));
-    }
-    // Utilities
-    function isUseStrictPrologue(node) {
-        return node.expression.text === "use strict";
-    }
-    /**
-     * Add any necessary prologue-directives into target statement-array.
-     * The function needs to be called during each transformation step.
-     * This function needs to be called whenever we transform the statement
-     * list of a source file, namespace, or function-like body.
-     *
-     * @param target: result statements array
-     * @param source: origin statements array
-     * @param ensureUseStrict: boolean determining whether the function need to add prologue-directives
-     * @param visitor: Optional callback used to visit any custom prologue directives.
-     */
-    function addPrologueDirectives(target, source, ensureUseStrict, visitor) {
-        ts.Debug.assert(target.length === 0, "PrologueDirectives should be at the first statement in the target statements array");
-        var foundUseStrict = false;
-        var statementOffset = 0;
-        var numStatements = source.length;
-        while (statementOffset < numStatements) {
-            var statement = source[statementOffset];
-            if (ts.isPrologueDirective(statement)) {
-                if (isUseStrictPrologue(statement)) {
-                    foundUseStrict = true;
-                }
-                target.push(statement);
+        function parseVariableDeclaration() {
+            var node = createNode(226 /* VariableDeclaration */);
+            node.name = parseIdentifierOrPattern();
+            node.type = parseTypeAnnotation();
+            if (!isInOrOfKeyword(token())) {
+                node.initializer = parseInitializer(/*inParameter*/ false);
             }
-            else {
-                if (ensureUseStrict && !foundUseStrict) {
-                    target.push(startOnNewLine(createStatement(createLiteral("use strict"))));
-                    foundUseStrict = true;
-                }
-                if (getEmitFlags(statement) & 8388608 /* CustomPrologue */) {
-                    target.push(visitor ? ts.visitNode(statement, visitor, ts.isStatement) : statement);
-                }
-                else {
+            return finishNode(node);
+        }
+        function parseVariableDeclarationList(inForStatementInitializer) {
+            var node = createNode(227 /* VariableDeclarationList */);
+            switch (token()) {
+                case 104 /* VarKeyword */:
                     break;
-                }
+                case 110 /* LetKeyword */:
+                    node.flags |= 1 /* Let */;
+                    break;
+                case 76 /* ConstKeyword */:
+                    node.flags |= 2 /* Const */;
+                    break;
+                default:
+                    ts.Debug.fail();
             }
-            statementOffset++;
+            nextToken();
+            // The user may have written the following:
+            //
+            //    for (let of X) { }
+            //
+            // In this case, we want to parse an empty declaration list, and then parse 'of'
+            // as a keyword. The reason this is not automatic is that 'of' is a valid identifier.
+            // So we need to look ahead to determine if 'of' should be treated as a keyword in
+            // this context.
+            // The checker will then give an error that there is an empty declaration list.
+            if (token() === 142 /* OfKeyword */ && lookAhead(canFollowContextualOfKeyword)) {
+                node.declarations = createMissingList();
+            }
+            else {
+                var savedDisallowIn = inDisallowInContext();
+                setDisallowInContext(inForStatementInitializer);
+                node.declarations = parseDelimitedList(8 /* VariableDeclarations */, parseVariableDeclaration);
+                setDisallowInContext(savedDisallowIn);
+            }
+            return finishNode(node);
         }
-        return statementOffset;
-    }
-    ts.addPrologueDirectives = addPrologueDirectives;
-    /**
-     * Wraps the operand to a BinaryExpression in parentheses if they are needed to preserve the intended
-     * order of operations.
-     *
-     * @param binaryOperator The operator for the BinaryExpression.
-     * @param operand The operand for the BinaryExpression.
-     * @param isLeftSideOfBinary A value indicating whether the operand is the left side of the
-     *                           BinaryExpression.
-     */
-    function parenthesizeBinaryOperand(binaryOperator, operand, isLeftSideOfBinary, leftOperand) {
-        var skipped = skipPartiallyEmittedExpressions(operand);
-        // If the resulting expression is already parenthesized, we do not need to do any further processing.
-        if (skipped.kind === 178 /* ParenthesizedExpression */) {
-            return operand;
+        function canFollowContextualOfKeyword() {
+            return nextTokenIsIdentifier() && nextToken() === 20 /* CloseParenToken */;
         }
-        return binaryOperandNeedsParentheses(binaryOperator, operand, isLeftSideOfBinary, leftOperand)
-            ? createParen(operand)
-            : operand;
-    }
-    ts.parenthesizeBinaryOperand = parenthesizeBinaryOperand;
-    /**
-     * Determines whether the operand to a BinaryExpression needs to be parenthesized.
-     *
-     * @param binaryOperator The operator for the BinaryExpression.
-     * @param operand The operand for the BinaryExpression.
-     * @param isLeftSideOfBinary A value indicating whether the operand is the left side of the
-     *                           BinaryExpression.
-     */
-    function binaryOperandNeedsParentheses(binaryOperator, operand, isLeftSideOfBinary, leftOperand) {
-        // If the operand has lower precedence, then it needs to be parenthesized to preserve the
-        // intent of the expression. For example, if the operand is `a + b` and the operator is
-        // `*`, then we need to parenthesize the operand to preserve the intended order of
-        // operations: `(a + b) * x`.
-        //
-        // If the operand has higher precedence, then it does not need to be parenthesized. For
-        // example, if the operand is `a * b` and the operator is `+`, then we do not need to
-        // parenthesize to preserve the intended order of operations: `a * b + x`.
-        //
-        // If the operand has the same precedence, then we need to check the associativity of
-        // the operator based on whether this is the left or right operand of the expression.
-        //
-        // For example, if `a / d` is on the right of operator `*`, we need to parenthesize
-        // to preserve the intended order of operations: `x * (a / d)`
-        //
-        // If `a ** d` is on the left of operator `**`, we need to parenthesize to preserve
-        // the intended order of operations: `(a ** b) ** c`
-        var binaryOperatorPrecedence = ts.getOperatorPrecedence(187 /* BinaryExpression */, binaryOperator);
-        var binaryOperatorAssociativity = ts.getOperatorAssociativity(187 /* BinaryExpression */, binaryOperator);
-        var emittedOperand = skipPartiallyEmittedExpressions(operand);
-        var operandPrecedence = ts.getExpressionPrecedence(emittedOperand);
-        switch (ts.compareValues(operandPrecedence, binaryOperatorPrecedence)) {
-            case -1 /* LessThan */:
-                // If the operand is the right side of a right-associative binary operation
-                // and is a yield expression, then we do not need parentheses.
-                if (!isLeftSideOfBinary
-                    && binaryOperatorAssociativity === 1 /* Right */
-                    && operand.kind === 190 /* YieldExpression */) {
-                    return false;
-                }
-                return true;
-            case 1 /* GreaterThan */:
-                return false;
-            case 0 /* EqualTo */:
-                if (isLeftSideOfBinary) {
-                    // No need to parenthesize the left operand when the binary operator is
-                    // left associative:
-                    //  (a*b)/x    ->  a*b/x
-                    //  (a**b)/x   ->  a**b/x
-                    //
-                    // Parentheses are needed for the left operand when the binary operator is
-                    // right associative:
-                    //  (a/b)**x   ->  (a/b)**x
-                    //  (a**b)**x  ->  (a**b)**x
-                    return binaryOperatorAssociativity === 1 /* Right */;
-                }
-                else {
-                    if (ts.isBinaryExpression(emittedOperand)
-                        && emittedOperand.operatorToken.kind === binaryOperator) {
-                        // No need to parenthesize the right operand when the binary operator and
-                        // operand are the same and one of the following:
-                        //  x*(a*b)     => x*a*b
-                        //  x|(a|b)     => x|a|b
-                        //  x&(a&b)     => x&a&b
-                        //  x^(a^b)     => x^a^b
-                        if (operatorHasAssociativeProperty(binaryOperator)) {
-                            return false;
-                        }
-                        // No need to parenthesize the right operand when the binary operator
-                        // is plus (+) if both the left and right operands consist solely of either
-                        // literals of the same kind or binary plus (+) expressions for literals of
-                        // the same kind (recursively).
-                        //  "a"+(1+2)       => "a"+(1+2)
-                        //  "a"+("b"+"c")   => "a"+"b"+"c"
-                        if (binaryOperator === 35 /* PlusToken */) {
-                            var leftKind = leftOperand ? getLiteralKindOfBinaryPlusOperand(leftOperand) : 0 /* Unknown */;
-                            if (ts.isLiteralKind(leftKind) && leftKind === getLiteralKindOfBinaryPlusOperand(emittedOperand)) {
-                                return false;
-                            }
-                        }
-                    }
-                    // No need to parenthesize the right operand when the operand is right
-                    // associative:
-                    //  x/(a**b)    -> x/a**b
-                    //  x**(a**b)   -> x**a**b
-                    //
-                    // Parentheses are needed for the right operand when the operand is left
-                    // associative:
-                    //  x/(a*b)     -> x/(a*b)
-                    //  x**(a/b)    -> x**(a/b)
-                    var operandAssociativity = ts.getExpressionAssociativity(emittedOperand);
-                    return operandAssociativity === 0 /* Left */;
-                }
+        function parseVariableStatement(fullStart, decorators, modifiers) {
+            var node = createNode(208 /* VariableStatement */, fullStart);
+            node.decorators = decorators;
+            node.modifiers = modifiers;
+            node.declarationList = parseVariableDeclarationList(/*inForStatementInitializer*/ false);
+            parseSemicolon();
+            return addJSDocComment(finishNode(node));
         }
-    }
-    /**
-     * Determines whether a binary operator is mathematically associative.
-     *
-     * @param binaryOperator The binary operator.
-     */
-    function operatorHasAssociativeProperty(binaryOperator) {
-        // The following operators are associative in JavaScript:
-        //  (a*b)*c     -> a*(b*c)  -> a*b*c
-        //  (a|b)|c     -> a|(b|c)  -> a|b|c
-        //  (a&b)&c     -> a&(b&c)  -> a&b&c
-        //  (a^b)^c     -> a^(b^c)  -> a^b^c
-        //
-        // While addition is associative in mathematics, JavaScript's `+` is not
-        // guaranteed to be associative as it is overloaded with string concatenation.
-        return binaryOperator === 37 /* AsteriskToken */
-            || binaryOperator === 47 /* BarToken */
-            || binaryOperator === 46 /* AmpersandToken */
-            || binaryOperator === 48 /* CaretToken */;
-    }
-    /**
-     * This function determines whether an expression consists of a homogeneous set of
-     * literal expressions or binary plus expressions that all share the same literal kind.
-     * It is used to determine whether the right-hand operand of a binary plus expression can be
-     * emitted without parentheses.
-     */
-    function getLiteralKindOfBinaryPlusOperand(node) {
-        node = skipPartiallyEmittedExpressions(node);
-        if (ts.isLiteralKind(node.kind)) {
-            return node.kind;
+        function parseFunctionDeclaration(fullStart, decorators, modifiers) {
+            var node = createNode(228 /* FunctionDeclaration */, fullStart);
+            node.decorators = decorators;
+            node.modifiers = modifiers;
+            parseExpected(89 /* FunctionKeyword */);
+            node.asteriskToken = parseOptionalToken(39 /* AsteriskToken */);
+            node.name = ts.hasModifier(node, 512 /* Default */) ? parseOptionalIdentifier() : parseIdentifier();
+            var isGenerator = !!node.asteriskToken;
+            var isAsync = ts.hasModifier(node, 256 /* Async */);
+            fillSignature(56 /* ColonToken */, /*yieldContext*/ isGenerator, /*awaitContext*/ isAsync, /*requireCompleteParameterList*/ false, node);
+            node.body = parseFunctionBlockOrSemicolon(isGenerator, isAsync, ts.Diagnostics.or_expected);
+            return addJSDocComment(finishNode(node));
         }
-        if (node.kind === 187 /* BinaryExpression */ && node.operatorToken.kind === 35 /* PlusToken */) {
-            if (node.cachedLiteralKind !== undefined) {
-                return node.cachedLiteralKind;
+        function parseConstructorDeclaration(pos, decorators, modifiers) {
+            var node = createNode(152 /* Constructor */, pos);
+            node.decorators = decorators;
+            node.modifiers = modifiers;
+            parseExpected(123 /* ConstructorKeyword */);
+            fillSignature(56 /* ColonToken */, /*yieldContext*/ false, /*awaitContext*/ false, /*requireCompleteParameterList*/ false, node);
+            node.body = parseFunctionBlockOrSemicolon(/*isGenerator*/ false, /*isAsync*/ false, ts.Diagnostics.or_expected);
+            return addJSDocComment(finishNode(node));
+        }
+        function parseMethodDeclaration(fullStart, decorators, modifiers, asteriskToken, name, questionToken, diagnosticMessage) {
+            var method = createNode(151 /* MethodDeclaration */, fullStart);
+            method.decorators = decorators;
+            method.modifiers = modifiers;
+            method.asteriskToken = asteriskToken;
+            method.name = name;
+            method.questionToken = questionToken;
+            var isGenerator = !!asteriskToken;
+            var isAsync = ts.hasModifier(method, 256 /* Async */);
+            fillSignature(56 /* ColonToken */, /*yieldContext*/ isGenerator, /*awaitContext*/ isAsync, /*requireCompleteParameterList*/ false, method);
+            method.body = parseFunctionBlockOrSemicolon(isGenerator, isAsync, diagnosticMessage);
+            return addJSDocComment(finishNode(method));
+        }
+        function parsePropertyDeclaration(fullStart, decorators, modifiers, name, questionToken) {
+            var property = createNode(149 /* PropertyDeclaration */, fullStart);
+            property.decorators = decorators;
+            property.modifiers = modifiers;
+            property.name = name;
+            property.questionToken = questionToken;
+            property.type = parseTypeAnnotation();
+            // For instance properties specifically, since they are evaluated inside the constructor,
+            // we do *not * want to parse yield expressions, so we specifically turn the yield context
+            // off. The grammar would look something like this:
+            //
+            //    MemberVariableDeclaration[Yield]:
+            //        AccessibilityModifier_opt   PropertyName   TypeAnnotation_opt   Initializer_opt[In];
+            //        AccessibilityModifier_opt  static_opt  PropertyName   TypeAnnotation_opt   Initializer_opt[In, ?Yield];
+            //
+            // The checker may still error in the static case to explicitly disallow the yield expression.
+            property.initializer = ts.hasModifier(property, 32 /* Static */)
+                ? allowInAnd(parseNonParameterInitializer)
+                : doOutsideOfContext(4096 /* YieldContext */ | 2048 /* DisallowInContext */, parseNonParameterInitializer);
+            parseSemicolon();
+            return addJSDocComment(finishNode(property));
+        }
+        function parsePropertyOrMethodDeclaration(fullStart, decorators, modifiers) {
+            var asteriskToken = parseOptionalToken(39 /* AsteriskToken */);
+            var name = parsePropertyName();
+            // Note: this is not legal as per the grammar.  But we allow it in the parser and
+            // report an error in the grammar checker.
+            var questionToken = parseOptionalToken(55 /* QuestionToken */);
+            if (asteriskToken || token() === 19 /* OpenParenToken */ || token() === 27 /* LessThanToken */) {
+                return parseMethodDeclaration(fullStart, decorators, modifiers, asteriskToken, name, questionToken, ts.Diagnostics.or_expected);
+            }
+            else {
+                return parsePropertyDeclaration(fullStart, decorators, modifiers, name, questionToken);
             }
-            var leftKind = getLiteralKindOfBinaryPlusOperand(node.left);
-            var literalKind = ts.isLiteralKind(leftKind)
-                && leftKind === getLiteralKindOfBinaryPlusOperand(node.right)
-                ? leftKind
-                : 0 /* Unknown */;
-            node.cachedLiteralKind = literalKind;
-            return literalKind;
         }
-        return 0 /* Unknown */;
-    }
-    /**
-     * Wraps an expression in parentheses if it is needed in order to use the expression
-     * as the expression of a NewExpression node.
-     *
-     * @param expression The Expression node.
-     */
-    function parenthesizeForNew(expression) {
-        var emittedExpression = skipPartiallyEmittedExpressions(expression);
-        switch (emittedExpression.kind) {
-            case 174 /* CallExpression */:
-                return createParen(expression);
-            case 175 /* NewExpression */:
-                return emittedExpression.arguments
-                    ? expression
-                    : createParen(expression);
+        function parseNonParameterInitializer() {
+            return parseInitializer(/*inParameter*/ false);
         }
-        return parenthesizeForAccess(expression);
-    }
-    ts.parenthesizeForNew = parenthesizeForNew;
-    /**
-     * Wraps an expression in parentheses if it is needed in order to use the expression for
-     * property or element access.
-     *
-     * @param expr The expression node.
-     */
-    function parenthesizeForAccess(expression) {
-        // isLeftHandSideExpression is almost the correct criterion for when it is not necessary
-        // to parenthesize the expression before a dot. The known exceptions are:
-        //
-        //    NewExpression:
-        //       new C.x        -> not the same as (new C).x
-        //    NumericLiteral
-        //       1.x            -> not the same as (1).x
-        //
-        var emittedExpression = skipPartiallyEmittedExpressions(expression);
-        if (ts.isLeftHandSideExpression(emittedExpression)
-            && (emittedExpression.kind !== 175 /* NewExpression */ || emittedExpression.arguments)
-            && emittedExpression.kind !== 8 /* NumericLiteral */) {
-            return expression;
+        function parseAccessorDeclaration(kind, fullStart, decorators, modifiers) {
+            var node = createNode(kind, fullStart);
+            node.decorators = decorators;
+            node.modifiers = modifiers;
+            node.name = parsePropertyName();
+            fillSignature(56 /* ColonToken */, /*yieldContext*/ false, /*awaitContext*/ false, /*requireCompleteParameterList*/ false, node);
+            node.body = parseFunctionBlockOrSemicolon(/*isGenerator*/ false, /*isAsync*/ false);
+            return addJSDocComment(finishNode(node));
         }
-        return createParen(expression, /*location*/ expression);
-    }
-    ts.parenthesizeForAccess = parenthesizeForAccess;
-    function parenthesizePostfixOperand(operand) {
-        return ts.isLeftHandSideExpression(operand)
-            ? operand
-            : createParen(operand, /*location*/ operand);
-    }
-    ts.parenthesizePostfixOperand = parenthesizePostfixOperand;
-    function parenthesizePrefixOperand(operand) {
-        return ts.isUnaryExpression(operand)
-            ? operand
-            : createParen(operand, /*location*/ operand);
-    }
-    ts.parenthesizePrefixOperand = parenthesizePrefixOperand;
-    function parenthesizeListElements(elements) {
-        var result;
-        for (var i = 0; i < elements.length; i++) {
-            var element = parenthesizeExpressionForList(elements[i]);
-            if (result !== undefined || element !== elements[i]) {
-                if (result === undefined) {
-                    result = elements.slice(0, i);
+        function isClassMemberModifier(idToken) {
+            switch (idToken) {
+                case 114 /* PublicKeyword */:
+                case 112 /* PrivateKeyword */:
+                case 113 /* ProtectedKeyword */:
+                case 115 /* StaticKeyword */:
+                case 131 /* ReadonlyKeyword */:
+                    return true;
+                default:
+                    return false;
+            }
+        }
+        function isClassMemberStart() {
+            var idToken;
+            if (token() === 57 /* AtToken */) {
+                return true;
+            }
+            // Eat up all modifiers, but hold on to the last one in case it is actually an identifier.
+            while (ts.isModifierKind(token())) {
+                idToken = token();
+                // If the idToken is a class modifier (protected, private, public, and static), it is
+                // certain that we are starting to parse class member. This allows better error recovery
+                // Example:
+                //      public foo() ...     // true
+                //      public @dec blah ... // true; we will then report an error later
+                //      export public ...    // true; we will then report an error later
+                if (isClassMemberModifier(idToken)) {
+                    return true;
+                }
+                nextToken();
+            }
+            if (token() === 39 /* AsteriskToken */) {
+                return true;
+            }
+            // Try to get the first property-like token following all modifiers.
+            // This can either be an identifier or the 'get' or 'set' keywords.
+            if (isLiteralPropertyName()) {
+                idToken = token();
+                nextToken();
+            }
+            // Index signatures and computed properties are class members; we can parse.
+            if (token() === 21 /* OpenBracketToken */) {
+                return true;
+            }
+            // If we were able to get any potential identifier...
+            if (idToken !== undefined) {
+                // If we have a non-keyword identifier, or if we have an accessor, then it's safe to parse.
+                if (!ts.isKeyword(idToken) || idToken === 135 /* SetKeyword */ || idToken === 125 /* GetKeyword */) {
+                    return true;
+                }
+                // If it *is* a keyword, but not an accessor, check a little farther along
+                // to see if it should actually be parsed as a class member.
+                switch (token()) {
+                    case 19 /* OpenParenToken */: // Method declaration
+                    case 27 /* LessThanToken */: // Generic Method declaration
+                    case 56 /* ColonToken */: // Type Annotation for declaration
+                    case 58 /* EqualsToken */: // Initializer for declaration
+                    case 55 /* QuestionToken */:
+                        return true;
+                    default:
+                        // Covers
+                        //  - Semicolons     (declaration termination)
+                        //  - Closing braces (end-of-class, must be declaration)
+                        //  - End-of-files   (not valid, but permitted so that it gets caught later on)
+                        //  - Line-breaks    (enabling *automatic semicolon insertion*)
+                        return canParseSemicolon();
                 }
-                result.push(element);
             }
+            return false;
         }
-        if (result !== undefined) {
-            return createNodeArray(result, elements, elements.hasTrailingComma);
-        }
-        return elements;
-    }
-    function parenthesizeExpressionForList(expression) {
-        var emittedExpression = skipPartiallyEmittedExpressions(expression);
-        var expressionPrecedence = ts.getExpressionPrecedence(emittedExpression);
-        var commaPrecedence = ts.getOperatorPrecedence(187 /* BinaryExpression */, 24 /* CommaToken */);
-        return expressionPrecedence > commaPrecedence
-            ? expression
-            : createParen(expression, /*location*/ expression);
-    }
-    ts.parenthesizeExpressionForList = parenthesizeExpressionForList;
-    function parenthesizeExpressionForExpressionStatement(expression) {
-        var emittedExpression = skipPartiallyEmittedExpressions(expression);
-        if (ts.isCallExpression(emittedExpression)) {
-            var callee = emittedExpression.expression;
-            var kind = skipPartiallyEmittedExpressions(callee).kind;
-            if (kind === 179 /* FunctionExpression */ || kind === 180 /* ArrowFunction */) {
-                var mutableCall = getMutableClone(emittedExpression);
-                mutableCall.expression = createParen(callee, /*location*/ callee);
-                return recreatePartiallyEmittedExpressions(expression, mutableCall);
+        function parseDecorators() {
+            var decorators;
+            while (true) {
+                var decoratorStart = getNodePos();
+                if (!parseOptional(57 /* AtToken */)) {
+                    break;
+                }
+                var decorator = createNode(147 /* Decorator */, decoratorStart);
+                decorator.expression = doInDecoratorContext(parseLeftHandSideExpressionOrHigher);
+                finishNode(decorator);
+                if (!decorators) {
+                    decorators = createNodeArray([decorator], decoratorStart);
+                }
+                else {
+                    decorators.push(decorator);
+                }
             }
-        }
-        else {
-            var leftmostExpressionKind = getLeftmostExpression(emittedExpression).kind;
-            if (leftmostExpressionKind === 171 /* ObjectLiteralExpression */ || leftmostExpressionKind === 179 /* FunctionExpression */) {
-                return createParen(expression, /*location*/ expression);
+            if (decorators) {
+                decorators.end = getNodeEnd();
             }
+            return decorators;
         }
-        return expression;
-    }
-    ts.parenthesizeExpressionForExpressionStatement = parenthesizeExpressionForExpressionStatement;
-    /**
-     * Clones a series of not-emitted expressions with a new inner expression.
-     *
-     * @param originalOuterExpression The original outer expression.
-     * @param newInnerExpression The new inner expression.
-     */
-    function recreatePartiallyEmittedExpressions(originalOuterExpression, newInnerExpression) {
-        if (ts.isPartiallyEmittedExpression(originalOuterExpression)) {
-            var clone_1 = getMutableClone(originalOuterExpression);
-            clone_1.expression = recreatePartiallyEmittedExpressions(clone_1.expression, newInnerExpression);
-            return clone_1;
-        }
-        return newInnerExpression;
-    }
-    function getLeftmostExpression(node) {
-        while (true) {
-            switch (node.kind) {
-                case 186 /* PostfixUnaryExpression */:
-                    node = node.operand;
-                    continue;
-                case 187 /* BinaryExpression */:
-                    node = node.left;
-                    continue;
-                case 188 /* ConditionalExpression */:
-                    node = node.condition;
-                    continue;
-                case 174 /* CallExpression */:
-                case 173 /* ElementAccessExpression */:
-                case 172 /* PropertyAccessExpression */:
-                    node = node.expression;
-                    continue;
-                case 288 /* PartiallyEmittedExpression */:
-                    node = node.expression;
-                    continue;
+        /*
+         * There are situations in which a modifier like 'const' will appear unexpectedly, such as on a class member.
+         * In those situations, if we are entirely sure that 'const' is not valid on its own (such as when ASI takes effect
+         * and turns it into a standalone declaration), then it is better to parse it and report an error later.
+         *
+         * In such situations, 'permitInvalidConstAsModifier' should be set to true.
+         */
+        function parseModifiers(permitInvalidConstAsModifier) {
+            var modifiers;
+            while (true) {
+                var modifierStart = scanner.getStartPos();
+                var modifierKind = token();
+                if (token() === 76 /* ConstKeyword */ && permitInvalidConstAsModifier) {
+                    // We need to ensure that any subsequent modifiers appear on the same line
+                    // so that when 'const' is a standalone declaration, we don't issue an error.
+                    if (!tryParse(nextTokenIsOnSameLineAndCanFollowModifier)) {
+                        break;
+                    }
+                }
+                else {
+                    if (!parseAnyContextualModifier()) {
+                        break;
+                    }
+                }
+                var modifier = finishNode(createNode(modifierKind, modifierStart));
+                if (!modifiers) {
+                    modifiers = createNodeArray([modifier], modifierStart);
+                }
+                else {
+                    modifiers.push(modifier);
+                }
             }
-            return node;
+            if (modifiers) {
+                modifiers.end = scanner.getStartPos();
+            }
+            return modifiers;
         }
-    }
-    function parenthesizeConciseBody(body) {
-        var emittedBody = skipPartiallyEmittedExpressions(body);
-        if (emittedBody.kind === 171 /* ObjectLiteralExpression */) {
-            return createParen(body, /*location*/ body);
+        function parseModifiersForArrowFunction() {
+            var modifiers;
+            if (token() === 120 /* AsyncKeyword */) {
+                var modifierStart = scanner.getStartPos();
+                var modifierKind = token();
+                nextToken();
+                var modifier = finishNode(createNode(modifierKind, modifierStart));
+                modifiers = createNodeArray([modifier], modifierStart);
+                modifiers.end = scanner.getStartPos();
+            }
+            return modifiers;
         }
-        return body;
-    }
-    ts.parenthesizeConciseBody = parenthesizeConciseBody;
-    (function (OuterExpressionKinds) {
-        OuterExpressionKinds[OuterExpressionKinds["Parentheses"] = 1] = "Parentheses";
-        OuterExpressionKinds[OuterExpressionKinds["Assertions"] = 2] = "Assertions";
-        OuterExpressionKinds[OuterExpressionKinds["PartiallyEmittedExpressions"] = 4] = "PartiallyEmittedExpressions";
-        OuterExpressionKinds[OuterExpressionKinds["All"] = 7] = "All";
-    })(ts.OuterExpressionKinds || (ts.OuterExpressionKinds = {}));
-    var OuterExpressionKinds = ts.OuterExpressionKinds;
-    function skipOuterExpressions(node, kinds) {
-        if (kinds === void 0) { kinds = 7 /* All */; }
-        var previousNode;
-        do {
-            previousNode = node;
-            if (kinds & 1 /* Parentheses */) {
-                node = skipParentheses(node);
+        function parseClassElement() {
+            if (token() === 25 /* SemicolonToken */) {
+                var result = createNode(206 /* SemicolonClassElement */);
+                nextToken();
+                return finishNode(result);
             }
-            if (kinds & 2 /* Assertions */) {
-                node = skipAssertions(node);
+            var fullStart = getNodePos();
+            var decorators = parseDecorators();
+            var modifiers = parseModifiers(/*permitInvalidConstAsModifier*/ true);
+            var accessor = tryParseAccessorDeclaration(fullStart, decorators, modifiers);
+            if (accessor) {
+                return accessor;
             }
-            if (kinds & 4 /* PartiallyEmittedExpressions */) {
-                node = skipPartiallyEmittedExpressions(node);
+            if (token() === 123 /* ConstructorKeyword */) {
+                return parseConstructorDeclaration(fullStart, decorators, modifiers);
             }
-        } while (previousNode !== node);
-        return node;
-    }
-    ts.skipOuterExpressions = skipOuterExpressions;
-    function skipParentheses(node) {
-        while (node.kind === 178 /* ParenthesizedExpression */) {
-            node = node.expression;
+            if (isIndexSignature()) {
+                return parseIndexSignatureDeclaration(fullStart, decorators, modifiers);
+            }
+            // It is very important that we check this *after* checking indexers because
+            // the [ token can start an index signature or a computed property name
+            if (ts.tokenIsIdentifierOrKeyword(token()) ||
+                token() === 9 /* StringLiteral */ ||
+                token() === 8 /* NumericLiteral */ ||
+                token() === 39 /* AsteriskToken */ ||
+                token() === 21 /* OpenBracketToken */) {
+                return parsePropertyOrMethodDeclaration(fullStart, decorators, modifiers);
+            }
+            if (decorators || modifiers) {
+                // treat this as a property declaration with a missing name.
+                var name_7 = createMissingNode(71 /* Identifier */, /*reportAtCurrentPosition*/ true, ts.Diagnostics.Declaration_expected);
+                return parsePropertyDeclaration(fullStart, decorators, modifiers, name_7, /*questionToken*/ undefined);
+            }
+            // 'isClassMemberStart' should have hinted not to attempt parsing.
+            ts.Debug.fail("Should not have attempted to parse class member declaration.");
         }
-        return node;
-    }
-    ts.skipParentheses = skipParentheses;
-    function skipAssertions(node) {
-        while (ts.isAssertionExpression(node)) {
-            node = node.expression;
+        function parseClassExpression() {
+            return parseClassDeclarationOrExpression(
+            /*fullStart*/ scanner.getStartPos(), 
+            /*decorators*/ undefined, 
+            /*modifiers*/ undefined, 199 /* ClassExpression */);
         }
-        return node;
-    }
-    ts.skipAssertions = skipAssertions;
-    function skipPartiallyEmittedExpressions(node) {
-        while (node.kind === 288 /* PartiallyEmittedExpression */) {
-            node = node.expression;
+        function parseClassDeclaration(fullStart, decorators, modifiers) {
+            return parseClassDeclarationOrExpression(fullStart, decorators, modifiers, 229 /* ClassDeclaration */);
         }
-        return node;
-    }
-    ts.skipPartiallyEmittedExpressions = skipPartiallyEmittedExpressions;
-    function startOnNewLine(node) {
-        node.startsOnNewLine = true;
-        return node;
-    }
-    ts.startOnNewLine = startOnNewLine;
-    function setOriginalNode(node, original) {
-        node.original = original;
-        if (original) {
-            var emitNode = original.emitNode;
-            if (emitNode)
-                node.emitNode = mergeEmitNode(emitNode, node.emitNode);
+        function parseClassDeclarationOrExpression(fullStart, decorators, modifiers, kind) {
+            var node = createNode(kind, fullStart);
+            node.decorators = decorators;
+            node.modifiers = modifiers;
+            parseExpected(75 /* ClassKeyword */);
+            node.name = parseNameOfClassDeclarationOrExpression();
+            node.typeParameters = parseTypeParameters();
+            node.heritageClauses = parseHeritageClauses();
+            if (parseExpected(17 /* OpenBraceToken */)) {
+                // ClassTail[Yield,Await] : (Modified) See 14.5
+                //      ClassHeritage[?Yield,?Await]opt { ClassBody[?Yield,?Await]opt }
+                node.members = parseClassMembers();
+                parseExpected(18 /* CloseBraceToken */);
+            }
+            else {
+                node.members = createMissingList();
+            }
+            return addJSDocComment(finishNode(node));
         }
-        return node;
-    }
-    ts.setOriginalNode = setOriginalNode;
-    function mergeEmitNode(sourceEmitNode, destEmitNode) {
-        var flags = sourceEmitNode.flags, commentRange = sourceEmitNode.commentRange, sourceMapRange = sourceEmitNode.sourceMapRange, tokenSourceMapRanges = sourceEmitNode.tokenSourceMapRanges;
-        if (!destEmitNode && (flags || commentRange || sourceMapRange || tokenSourceMapRanges))
-            destEmitNode = {};
-        if (flags)
-            destEmitNode.flags = flags;
-        if (commentRange)
-            destEmitNode.commentRange = commentRange;
-        if (sourceMapRange)
-            destEmitNode.sourceMapRange = sourceMapRange;
-        if (tokenSourceMapRanges)
-            destEmitNode.tokenSourceMapRanges = mergeTokenSourceMapRanges(tokenSourceMapRanges, destEmitNode.tokenSourceMapRanges);
-        return destEmitNode;
-    }
-    function mergeTokenSourceMapRanges(sourceRanges, destRanges) {
-        if (!destRanges)
-            destRanges = ts.createMap();
-        ts.copyProperties(sourceRanges, destRanges);
-        return destRanges;
-    }
-    /**
-     * Clears any EmitNode entries from parse-tree nodes.
-     * @param sourceFile A source file.
-     */
-    function disposeEmitNodes(sourceFile) {
-        // During transformation we may need to annotate a parse tree node with transient
-        // transformation properties. As parse tree nodes live longer than transformation
-        // nodes, we need to make sure we reclaim any memory allocated for custom ranges
-        // from these nodes to ensure we do not hold onto entire subtrees just for position
-        // information. We also need to reset these nodes to a pre-transformation state
-        // for incremental parsing scenarios so that we do not impact later emit.
-        sourceFile = ts.getSourceFileOfNode(ts.getParseTreeNode(sourceFile));
-        var emitNode = sourceFile && sourceFile.emitNode;
-        var annotatedNodes = emitNode && emitNode.annotatedNodes;
-        if (annotatedNodes) {
-            for (var _i = 0, annotatedNodes_1 = annotatedNodes; _i < annotatedNodes_1.length; _i++) {
-                var node = annotatedNodes_1[_i];
-                node.emitNode = undefined;
+        function parseNameOfClassDeclarationOrExpression() {
+            // implements is a future reserved word so
+            // 'class implements' might mean either
+            // - class expression with omitted name, 'implements' starts heritage clause
+            // - class with name 'implements'
+            // 'isImplementsClause' helps to disambiguate between these two cases
+            return isIdentifier() && !isImplementsClause()
+                ? parseIdentifier()
+                : undefined;
+        }
+        function isImplementsClause() {
+            return token() === 108 /* ImplementsKeyword */ && lookAhead(nextTokenIsIdentifierOrKeyword);
+        }
+        function parseHeritageClauses() {
+            // ClassTail[Yield,Await] : (Modified) See 14.5
+            //      ClassHeritage[?Yield,?Await]opt { ClassBody[?Yield,?Await]opt }
+            if (isHeritageClause()) {
+                return parseList(21 /* HeritageClauses */, parseHeritageClause);
             }
+            return undefined;
         }
-    }
-    ts.disposeEmitNodes = disposeEmitNodes;
-    /**
-     * Associates a node with the current transformation, initializing
-     * various transient transformation properties.
-     *
-     * @param node The node.
-     */
-    function getOrCreateEmitNode(node) {
-        if (!node.emitNode) {
-            if (ts.isParseTreeNode(node)) {
-                // To avoid holding onto transformation artifacts, we keep track of any
-                // parse tree node we are annotating. This allows us to clean them up after
-                // all transformations have completed.
-                if (node.kind === 256 /* SourceFile */) {
-                    return node.emitNode = { annotatedNodes: [node] };
-                }
-                var sourceFile = ts.getSourceFileOfNode(node);
-                getOrCreateEmitNode(sourceFile).annotatedNodes.push(node);
+        function parseHeritageClause() {
+            var tok = token();
+            if (tok === 85 /* ExtendsKeyword */ || tok === 108 /* ImplementsKeyword */) {
+                var node = createNode(259 /* HeritageClause */);
+                node.token = tok;
+                nextToken();
+                node.types = parseDelimitedList(7 /* HeritageClauseElement */, parseExpressionWithTypeArguments);
+                return finishNode(node);
             }
-            node.emitNode = {};
+            return undefined;
         }
-        return node.emitNode;
-    }
-    /**
-     * Gets flags that control emit behavior of a node.
-     *
-     * @param node The node.
-     */
-    function getEmitFlags(node) {
-        var emitNode = node.emitNode;
-        return emitNode && emitNode.flags;
-    }
-    ts.getEmitFlags = getEmitFlags;
-    /**
-     * Sets flags that control emit behavior of a node.
-     *
-     * @param node The node.
-     * @param emitFlags The NodeEmitFlags for the node.
-     */
-    function setEmitFlags(node, emitFlags) {
-        getOrCreateEmitNode(node).flags = emitFlags;
-        return node;
-    }
-    ts.setEmitFlags = setEmitFlags;
-    /**
-     * Sets a custom text range to use when emitting source maps.
-     *
-     * @param node The node.
-     * @param range The text range.
-     */
-    function setSourceMapRange(node, range) {
-        getOrCreateEmitNode(node).sourceMapRange = range;
-        return node;
-    }
-    ts.setSourceMapRange = setSourceMapRange;
-    /**
-     * Sets the TextRange to use for source maps for a token of a node.
-     *
-     * @param node The node.
-     * @param token The token.
-     * @param range The text range.
-     */
-    function setTokenSourceMapRange(node, token, range) {
-        var emitNode = getOrCreateEmitNode(node);
-        var tokenSourceMapRanges = emitNode.tokenSourceMapRanges || (emitNode.tokenSourceMapRanges = ts.createMap());
-        tokenSourceMapRanges[token] = range;
-        return node;
-    }
-    ts.setTokenSourceMapRange = setTokenSourceMapRange;
-    /**
-     * Sets a custom text range to use when emitting comments.
-     */
-    function setCommentRange(node, range) {
-        getOrCreateEmitNode(node).commentRange = range;
-        return node;
-    }
-    ts.setCommentRange = setCommentRange;
-    /**
-     * Gets a custom text range to use when emitting comments.
-     *
-     * @param node The node.
-     */
-    function getCommentRange(node) {
-        var emitNode = node.emitNode;
-        return (emitNode && emitNode.commentRange) || node;
-    }
-    ts.getCommentRange = getCommentRange;
-    /**
-     * Gets a custom text range to use when emitting source maps.
-     *
-     * @param node The node.
-     */
-    function getSourceMapRange(node) {
-        var emitNode = node.emitNode;
-        return (emitNode && emitNode.sourceMapRange) || node;
-    }
-    ts.getSourceMapRange = getSourceMapRange;
-    /**
-     * Gets the TextRange to use for source maps for a token of a node.
-     *
-     * @param node The node.
-     * @param token The token.
-     */
-    function getTokenSourceMapRange(node, token) {
-        var emitNode = node.emitNode;
-        var tokenSourceMapRanges = emitNode && emitNode.tokenSourceMapRanges;
-        return tokenSourceMapRanges && tokenSourceMapRanges[token];
-    }
-    ts.getTokenSourceMapRange = getTokenSourceMapRange;
-    /**
-     * Gets the constant value to emit for an expression.
-     */
-    function getConstantValue(node) {
-        var emitNode = node.emitNode;
-        return emitNode && emitNode.constantValue;
-    }
-    ts.getConstantValue = getConstantValue;
-    /**
-     * Sets the constant value to emit for an expression.
-     */
-    function setConstantValue(node, value) {
-        var emitNode = getOrCreateEmitNode(node);
-        emitNode.constantValue = value;
-        return node;
-    }
-    ts.setConstantValue = setConstantValue;
-    function setTextRange(node, location) {
-        if (location) {
-            node.pos = location.pos;
-            node.end = location.end;
+        function parseExpressionWithTypeArguments() {
+            var node = createNode(201 /* ExpressionWithTypeArguments */);
+            node.expression = parseLeftHandSideExpressionOrHigher();
+            if (token() === 27 /* LessThanToken */) {
+                node.typeArguments = parseBracketedList(19 /* TypeArguments */, parseType, 27 /* LessThanToken */, 29 /* GreaterThanToken */);
+            }
+            return finishNode(node);
         }
-        return node;
-    }
-    ts.setTextRange = setTextRange;
-    function setNodeFlags(node, flags) {
-        node.flags = flags;
-        return node;
-    }
-    ts.setNodeFlags = setNodeFlags;
-    function setMultiLine(node, multiLine) {
-        node.multiLine = multiLine;
-        return node;
-    }
-    ts.setMultiLine = setMultiLine;
-    function setHasTrailingComma(nodes, hasTrailingComma) {
-        nodes.hasTrailingComma = hasTrailingComma;
-        return nodes;
-    }
-    ts.setHasTrailingComma = setHasTrailingComma;
-    /**
-     * Get the name of that target module from an import or export declaration
-     */
-    function getLocalNameForExternalImport(node, sourceFile) {
-        var namespaceDeclaration = ts.getNamespaceDeclarationNode(node);
-        if (namespaceDeclaration && !ts.isDefaultImport(node)) {
-            var name_9 = namespaceDeclaration.name;
-            return ts.isGeneratedIdentifier(name_9) ? name_9 : createIdentifier(ts.getSourceTextOfNodeFromSourceFile(sourceFile, namespaceDeclaration.name));
+        function isHeritageClause() {
+            return token() === 85 /* ExtendsKeyword */ || token() === 108 /* ImplementsKeyword */;
         }
-        if (node.kind === 230 /* ImportDeclaration */ && node.importClause) {
-            return getGeneratedNameForNode(node);
+        function parseClassMembers() {
+            return parseList(5 /* ClassMembers */, parseClassElement);
         }
-        if (node.kind === 236 /* ExportDeclaration */ && node.moduleSpecifier) {
-            return getGeneratedNameForNode(node);
+        function parseInterfaceDeclaration(fullStart, decorators, modifiers) {
+            var node = createNode(230 /* InterfaceDeclaration */, fullStart);
+            node.decorators = decorators;
+            node.modifiers = modifiers;
+            parseExpected(109 /* InterfaceKeyword */);
+            node.name = parseIdentifier();
+            node.typeParameters = parseTypeParameters();
+            node.heritageClauses = parseHeritageClauses();
+            node.members = parseObjectTypeMembers();
+            return addJSDocComment(finishNode(node));
         }
-        return undefined;
-    }
-    ts.getLocalNameForExternalImport = getLocalNameForExternalImport;
-    /**
-     * Get the name of a target module from an import/export declaration as should be written in the emitted output.
-     * The emitted output name can be different from the input if:
-     *  1. The module has a /// <amd-module name="<new name>" />
-     *  2. --out or --outFile is used, making the name relative to the rootDir
-     *  3- The containing SourceFile has an entry in renamedDependencies for the import as requested by some module loaders (e.g. System).
-     * Otherwise, a new StringLiteral node representing the module name will be returned.
-     */
-    function getExternalModuleNameLiteral(importNode, sourceFile, host, resolver, compilerOptions) {
-        var moduleName = ts.getExternalModuleName(importNode);
-        if (moduleName.kind === 9 /* StringLiteral */) {
-            return tryGetModuleNameFromDeclaration(importNode, host, resolver, compilerOptions)
-                || tryRenameExternalModule(moduleName, sourceFile)
-                || getSynthesizedClone(moduleName);
+        function parseTypeAliasDeclaration(fullStart, decorators, modifiers) {
+            var node = createNode(231 /* TypeAliasDeclaration */, fullStart);
+            node.decorators = decorators;
+            node.modifiers = modifiers;
+            parseExpected(138 /* TypeKeyword */);
+            node.name = parseIdentifier();
+            node.typeParameters = parseTypeParameters();
+            parseExpected(58 /* EqualsToken */);
+            node.type = parseType();
+            parseSemicolon();
+            return addJSDocComment(finishNode(node));
         }
-        return undefined;
-    }
-    ts.getExternalModuleNameLiteral = getExternalModuleNameLiteral;
-    /**
-     * Some bundlers (SystemJS builder) sometimes want to rename dependencies.
-     * Here we check if alternative name was provided for a given moduleName and return it if possible.
-     */
-    function tryRenameExternalModule(moduleName, sourceFile) {
-        if (sourceFile.renamedDependencies && ts.hasProperty(sourceFile.renamedDependencies, moduleName.text)) {
-            return createLiteral(sourceFile.renamedDependencies[moduleName.text]);
+        // In an ambient declaration, the grammar only allows integer literals as initializers.
+        // In a non-ambient declaration, the grammar allows uninitialized members only in a
+        // ConstantEnumMemberSection, which starts at the beginning of an enum declaration
+        // or any time an integer literal initializer is encountered.
+        function parseEnumMember() {
+            var node = createNode(264 /* EnumMember */, scanner.getStartPos());
+            node.name = parsePropertyName();
+            node.initializer = allowInAnd(parseNonParameterInitializer);
+            return addJSDocComment(finishNode(node));
         }
-        return undefined;
-    }
-    /**
-     * Get the name of a module as should be written in the emitted output.
-     * The emitted output name can be different from the input if:
-     *  1. The module has a /// <amd-module name="<new name>" />
-     *  2. --out or --outFile is used, making the name relative to the rootDir
-     * Otherwise, a new StringLiteral node representing the module name will be returned.
-     */
-    function tryGetModuleNameFromFile(file, host, options) {
-        if (!file) {
-            return undefined;
+        function parseEnumDeclaration(fullStart, decorators, modifiers) {
+            var node = createNode(232 /* EnumDeclaration */, fullStart);
+            node.decorators = decorators;
+            node.modifiers = modifiers;
+            parseExpected(83 /* EnumKeyword */);
+            node.name = parseIdentifier();
+            if (parseExpected(17 /* OpenBraceToken */)) {
+                node.members = parseDelimitedList(6 /* EnumMembers */, parseEnumMember);
+                parseExpected(18 /* CloseBraceToken */);
+            }
+            else {
+                node.members = createMissingList();
+            }
+            return addJSDocComment(finishNode(node));
         }
-        if (file.moduleName) {
-            return createLiteral(file.moduleName);
+        function parseModuleBlock() {
+            var node = createNode(234 /* ModuleBlock */, scanner.getStartPos());
+            if (parseExpected(17 /* OpenBraceToken */)) {
+                node.statements = parseList(1 /* BlockStatements */, parseStatement);
+                parseExpected(18 /* CloseBraceToken */);
+            }
+            else {
+                node.statements = createMissingList();
+            }
+            return finishNode(node);
         }
-        if (!ts.isDeclarationFile(file) && (options.out || options.outFile)) {
-            return createLiteral(ts.getExternalModuleNameFromPath(host, file.fileName));
+        function parseModuleOrNamespaceDeclaration(fullStart, decorators, modifiers, flags) {
+            var node = createNode(233 /* ModuleDeclaration */, fullStart);
+            // If we are parsing a dotted namespace name, we want to
+            // propagate the 'Namespace' flag across the names if set.
+            var namespaceFlag = flags & 16 /* Namespace */;
+            node.decorators = decorators;
+            node.modifiers = modifiers;
+            node.flags |= flags;
+            node.name = parseIdentifier();
+            node.body = parseOptional(23 /* DotToken */)
+                ? parseModuleOrNamespaceDeclaration(getNodePos(), /*decorators*/ undefined, /*modifiers*/ undefined, 4 /* NestedNamespace */ | namespaceFlag)
+                : parseModuleBlock();
+            return addJSDocComment(finishNode(node));
         }
-        return undefined;
-    }
-    ts.tryGetModuleNameFromFile = tryGetModuleNameFromFile;
-    function tryGetModuleNameFromDeclaration(declaration, host, resolver, compilerOptions) {
-        return tryGetModuleNameFromFile(resolver.getExternalModuleFileFromDeclaration(declaration), host, compilerOptions);
-    }
-})(ts || (ts = {}));
-/// <reference path="utilities.ts"/>
-/// <reference path="scanner.ts"/>
-/// <reference path="factory.ts"/>
-var ts;
-(function (ts) {
-    var NodeConstructor;
-    var TokenConstructor;
-    var IdentifierConstructor;
-    var SourceFileConstructor;
-    function createNode(kind, pos, end) {
-        if (kind === 256 /* SourceFile */) {
-            return new (SourceFileConstructor || (SourceFileConstructor = ts.objectAllocator.getSourceFileConstructor()))(kind, pos, end);
+        function parseAmbientExternalModuleDeclaration(fullStart, decorators, modifiers) {
+            var node = createNode(233 /* ModuleDeclaration */, fullStart);
+            node.decorators = decorators;
+            node.modifiers = modifiers;
+            if (token() === 141 /* GlobalKeyword */) {
+                // parse 'global' as name of global scope augmentation
+                node.name = parseIdentifier();
+                node.flags |= 512 /* GlobalAugmentation */;
+            }
+            else {
+                node.name = parseLiteralNode(/*internName*/ true);
+            }
+            if (token() === 17 /* OpenBraceToken */) {
+                node.body = parseModuleBlock();
+            }
+            else {
+                parseSemicolon();
+            }
+            return finishNode(node);
         }
-        else if (kind === 69 /* Identifier */) {
-            return new (IdentifierConstructor || (IdentifierConstructor = ts.objectAllocator.getIdentifierConstructor()))(kind, pos, end);
+        function parseModuleDeclaration(fullStart, decorators, modifiers) {
+            var flags = 0;
+            if (token() === 141 /* GlobalKeyword */) {
+                // global augmentation
+                return parseAmbientExternalModuleDeclaration(fullStart, decorators, modifiers);
+            }
+            else if (parseOptional(129 /* NamespaceKeyword */)) {
+                flags |= 16 /* Namespace */;
+            }
+            else {
+                parseExpected(128 /* ModuleKeyword */);
+                if (token() === 9 /* StringLiteral */) {
+                    return parseAmbientExternalModuleDeclaration(fullStart, decorators, modifiers);
+                }
+            }
+            return parseModuleOrNamespaceDeclaration(fullStart, decorators, modifiers, flags);
         }
-        else if (kind < 139 /* FirstNode */) {
-            return new (TokenConstructor || (TokenConstructor = ts.objectAllocator.getTokenConstructor()))(kind, pos, end);
+        function isExternalModuleReference() {
+            return token() === 132 /* RequireKeyword */ &&
+                lookAhead(nextTokenIsOpenParen);
         }
-        else {
-            return new (NodeConstructor || (NodeConstructor = ts.objectAllocator.getNodeConstructor()))(kind, pos, end);
+        function nextTokenIsOpenParen() {
+            return nextToken() === 19 /* OpenParenToken */;
         }
-    }
-    ts.createNode = createNode;
-    function visitNode(cbNode, node) {
-        if (node) {
-            return cbNode(node);
+        function nextTokenIsSlash() {
+            return nextToken() === 41 /* SlashToken */;
         }
-    }
-    function visitNodeArray(cbNodes, nodes) {
-        if (nodes) {
-            return cbNodes(nodes);
+        function parseNamespaceExportDeclaration(fullStart, decorators, modifiers) {
+            var exportDeclaration = createNode(236 /* NamespaceExportDeclaration */, fullStart);
+            exportDeclaration.decorators = decorators;
+            exportDeclaration.modifiers = modifiers;
+            parseExpected(118 /* AsKeyword */);
+            parseExpected(129 /* NamespaceKeyword */);
+            exportDeclaration.name = parseIdentifier();
+            parseSemicolon();
+            return finishNode(exportDeclaration);
         }
-    }
-    function visitEachNode(cbNode, nodes) {
-        if (nodes) {
-            for (var _i = 0, nodes_1 = nodes; _i < nodes_1.length; _i++) {
-                var node = nodes_1[_i];
-                var result = cbNode(node);
-                if (result) {
-                    return result;
+        function parseImportDeclarationOrImportEqualsDeclaration(fullStart, decorators, modifiers) {
+            parseExpected(91 /* ImportKeyword */);
+            var afterImportPos = scanner.getStartPos();
+            var identifier;
+            if (isIdentifier()) {
+                identifier = parseIdentifier();
+                if (token() !== 26 /* CommaToken */ && token() !== 140 /* FromKeyword */) {
+                    return parseImportEqualsDeclaration(fullStart, decorators, modifiers, identifier);
                 }
             }
+            // Import statement
+            var importDeclaration = createNode(238 /* ImportDeclaration */, fullStart);
+            importDeclaration.decorators = decorators;
+            importDeclaration.modifiers = modifiers;
+            // ImportDeclaration:
+            //  import ImportClause from ModuleSpecifier ;
+            //  import ModuleSpecifier;
+            if (identifier ||
+                token() === 39 /* AsteriskToken */ ||
+                token() === 17 /* OpenBraceToken */) {
+                importDeclaration.importClause = parseImportClause(identifier, afterImportPos);
+                parseExpected(140 /* FromKeyword */);
+            }
+            importDeclaration.moduleSpecifier = parseModuleSpecifier();
+            parseSemicolon();
+            return finishNode(importDeclaration);
         }
-    }
-    // Invokes a callback for each child of the given node. The 'cbNode' callback is invoked for all child nodes
-    // stored in properties. If a 'cbNodes' callback is specified, it is invoked for embedded arrays; otherwise,
-    // embedded arrays are flattened and the 'cbNode' callback is invoked for each element. If a callback returns
-    // a truthy value, iteration stops and that value is returned. Otherwise, undefined is returned.
-    function forEachChild(node, cbNode, cbNodeArray) {
-        if (!node) {
-            return;
+        function parseImportEqualsDeclaration(fullStart, decorators, modifiers, identifier) {
+            var importEqualsDeclaration = createNode(237 /* ImportEqualsDeclaration */, fullStart);
+            importEqualsDeclaration.decorators = decorators;
+            importEqualsDeclaration.modifiers = modifiers;
+            importEqualsDeclaration.name = identifier;
+            parseExpected(58 /* EqualsToken */);
+            importEqualsDeclaration.moduleReference = parseModuleReference();
+            parseSemicolon();
+            return addJSDocComment(finishNode(importEqualsDeclaration));
         }
-        // The visitXXX functions could be written as local functions that close over the cbNode and cbNodeArray
-        // callback parameters, but that causes a closure allocation for each invocation with noticeable effects
-        // on performance.
-        var visitNodes = cbNodeArray ? visitNodeArray : visitEachNode;
-        var cbNodes = cbNodeArray || cbNode;
-        switch (node.kind) {
-            case 139 /* QualifiedName */:
-                return visitNode(cbNode, node.left) ||
-                    visitNode(cbNode, node.right);
-            case 141 /* TypeParameter */:
-                return visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.constraint) ||
-                    visitNode(cbNode, node.expression);
-            case 254 /* ShorthandPropertyAssignment */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.questionToken) ||
-                    visitNode(cbNode, node.equalsToken) ||
-                    visitNode(cbNode, node.objectAssignmentInitializer);
-            case 142 /* Parameter */:
-            case 145 /* PropertyDeclaration */:
-            case 144 /* PropertySignature */:
-            case 253 /* PropertyAssignment */:
-            case 218 /* VariableDeclaration */:
-            case 169 /* BindingElement */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.propertyName) ||
-                    visitNode(cbNode, node.dotDotDotToken) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.questionToken) ||
-                    visitNode(cbNode, node.type) ||
-                    visitNode(cbNode, node.initializer);
-            case 156 /* FunctionType */:
-            case 157 /* ConstructorType */:
-            case 151 /* CallSignature */:
-            case 152 /* ConstructSignature */:
-            case 153 /* IndexSignature */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNodes(cbNodes, node.typeParameters) ||
-                    visitNodes(cbNodes, node.parameters) ||
-                    visitNode(cbNode, node.type);
-            case 147 /* MethodDeclaration */:
-            case 146 /* MethodSignature */:
-            case 148 /* Constructor */:
-            case 149 /* GetAccessor */:
-            case 150 /* SetAccessor */:
-            case 179 /* FunctionExpression */:
-            case 220 /* FunctionDeclaration */:
-            case 180 /* ArrowFunction */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.asteriskToken) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.questionToken) ||
-                    visitNodes(cbNodes, node.typeParameters) ||
-                    visitNodes(cbNodes, node.parameters) ||
-                    visitNode(cbNode, node.type) ||
-                    visitNode(cbNode, node.equalsGreaterThanToken) ||
-                    visitNode(cbNode, node.body);
-            case 155 /* TypeReference */:
-                return visitNode(cbNode, node.typeName) ||
-                    visitNodes(cbNodes, node.typeArguments);
-            case 154 /* TypePredicate */:
-                return visitNode(cbNode, node.parameterName) ||
-                    visitNode(cbNode, node.type);
-            case 158 /* TypeQuery */:
-                return visitNode(cbNode, node.exprName);
-            case 159 /* TypeLiteral */:
-                return visitNodes(cbNodes, node.members);
-            case 160 /* ArrayType */:
-                return visitNode(cbNode, node.elementType);
-            case 161 /* TupleType */:
-                return visitNodes(cbNodes, node.elementTypes);
-            case 162 /* UnionType */:
-            case 163 /* IntersectionType */:
-                return visitNodes(cbNodes, node.types);
-            case 164 /* ParenthesizedType */:
-                return visitNode(cbNode, node.type);
-            case 166 /* LiteralType */:
-                return visitNode(cbNode, node.literal);
-            case 167 /* ObjectBindingPattern */:
-            case 168 /* ArrayBindingPattern */:
-                return visitNodes(cbNodes, node.elements);
-            case 170 /* ArrayLiteralExpression */:
-                return visitNodes(cbNodes, node.elements);
-            case 171 /* ObjectLiteralExpression */:
-                return visitNodes(cbNodes, node.properties);
-            case 172 /* PropertyAccessExpression */:
-                return visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.name);
-            case 173 /* ElementAccessExpression */:
-                return visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.argumentExpression);
-            case 174 /* CallExpression */:
-            case 175 /* NewExpression */:
-                return visitNode(cbNode, node.expression) ||
-                    visitNodes(cbNodes, node.typeArguments) ||
-                    visitNodes(cbNodes, node.arguments);
-            case 176 /* TaggedTemplateExpression */:
-                return visitNode(cbNode, node.tag) ||
-                    visitNode(cbNode, node.template);
-            case 177 /* TypeAssertionExpression */:
-                return visitNode(cbNode, node.type) ||
-                    visitNode(cbNode, node.expression);
-            case 178 /* ParenthesizedExpression */:
-                return visitNode(cbNode, node.expression);
-            case 181 /* DeleteExpression */:
-                return visitNode(cbNode, node.expression);
-            case 182 /* TypeOfExpression */:
-                return visitNode(cbNode, node.expression);
-            case 183 /* VoidExpression */:
-                return visitNode(cbNode, node.expression);
-            case 185 /* PrefixUnaryExpression */:
-                return visitNode(cbNode, node.operand);
-            case 190 /* YieldExpression */:
-                return visitNode(cbNode, node.asteriskToken) ||
-                    visitNode(cbNode, node.expression);
-            case 184 /* AwaitExpression */:
-                return visitNode(cbNode, node.expression);
-            case 186 /* PostfixUnaryExpression */:
-                return visitNode(cbNode, node.operand);
-            case 187 /* BinaryExpression */:
-                return visitNode(cbNode, node.left) ||
-                    visitNode(cbNode, node.operatorToken) ||
-                    visitNode(cbNode, node.right);
-            case 195 /* AsExpression */:
-                return visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.type);
-            case 196 /* NonNullExpression */:
-                return visitNode(cbNode, node.expression);
-            case 188 /* ConditionalExpression */:
-                return visitNode(cbNode, node.condition) ||
-                    visitNode(cbNode, node.questionToken) ||
-                    visitNode(cbNode, node.whenTrue) ||
-                    visitNode(cbNode, node.colonToken) ||
-                    visitNode(cbNode, node.whenFalse);
-            case 191 /* SpreadElementExpression */:
-                return visitNode(cbNode, node.expression);
-            case 199 /* Block */:
-            case 226 /* ModuleBlock */:
-                return visitNodes(cbNodes, node.statements);
-            case 256 /* SourceFile */:
-                return visitNodes(cbNodes, node.statements) ||
-                    visitNode(cbNode, node.endOfFileToken);
-            case 200 /* VariableStatement */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.declarationList);
-            case 219 /* VariableDeclarationList */:
-                return visitNodes(cbNodes, node.declarations);
-            case 202 /* ExpressionStatement */:
-                return visitNode(cbNode, node.expression);
-            case 203 /* IfStatement */:
-                return visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.thenStatement) ||
-                    visitNode(cbNode, node.elseStatement);
-            case 204 /* DoStatement */:
-                return visitNode(cbNode, node.statement) ||
-                    visitNode(cbNode, node.expression);
-            case 205 /* WhileStatement */:
-                return visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.statement);
-            case 206 /* ForStatement */:
-                return visitNode(cbNode, node.initializer) ||
-                    visitNode(cbNode, node.condition) ||
-                    visitNode(cbNode, node.incrementor) ||
-                    visitNode(cbNode, node.statement);
-            case 207 /* ForInStatement */:
-                return visitNode(cbNode, node.initializer) ||
-                    visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.statement);
-            case 208 /* ForOfStatement */:
-                return visitNode(cbNode, node.initializer) ||
-                    visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.statement);
-            case 209 /* ContinueStatement */:
-            case 210 /* BreakStatement */:
-                return visitNode(cbNode, node.label);
-            case 211 /* ReturnStatement */:
-                return visitNode(cbNode, node.expression);
-            case 212 /* WithStatement */:
-                return visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.statement);
-            case 213 /* SwitchStatement */:
-                return visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.caseBlock);
-            case 227 /* CaseBlock */:
-                return visitNodes(cbNodes, node.clauses);
-            case 249 /* CaseClause */:
-                return visitNode(cbNode, node.expression) ||
-                    visitNodes(cbNodes, node.statements);
-            case 250 /* DefaultClause */:
-                return visitNodes(cbNodes, node.statements);
-            case 214 /* LabeledStatement */:
-                return visitNode(cbNode, node.label) ||
-                    visitNode(cbNode, node.statement);
-            case 215 /* ThrowStatement */:
-                return visitNode(cbNode, node.expression);
-            case 216 /* TryStatement */:
-                return visitNode(cbNode, node.tryBlock) ||
-                    visitNode(cbNode, node.catchClause) ||
-                    visitNode(cbNode, node.finallyBlock);
-            case 252 /* CatchClause */:
-                return visitNode(cbNode, node.variableDeclaration) ||
-                    visitNode(cbNode, node.block);
-            case 143 /* Decorator */:
-                return visitNode(cbNode, node.expression);
-            case 221 /* ClassDeclaration */:
-            case 192 /* ClassExpression */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNodes(cbNodes, node.typeParameters) ||
-                    visitNodes(cbNodes, node.heritageClauses) ||
-                    visitNodes(cbNodes, node.members);
-            case 222 /* InterfaceDeclaration */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNodes(cbNodes, node.typeParameters) ||
-                    visitNodes(cbNodes, node.heritageClauses) ||
-                    visitNodes(cbNodes, node.members);
-            case 223 /* TypeAliasDeclaration */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNodes(cbNodes, node.typeParameters) ||
-                    visitNode(cbNode, node.type);
-            case 224 /* EnumDeclaration */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNodes(cbNodes, node.members);
-            case 255 /* EnumMember */:
-                return visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.initializer);
-            case 225 /* ModuleDeclaration */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.body);
-            case 229 /* ImportEqualsDeclaration */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.moduleReference);
-            case 230 /* ImportDeclaration */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.importClause) ||
-                    visitNode(cbNode, node.moduleSpecifier);
-            case 231 /* ImportClause */:
-                return visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.namedBindings);
-            case 228 /* NamespaceExportDeclaration */:
-                return visitNode(cbNode, node.name);
-            case 232 /* NamespaceImport */:
-                return visitNode(cbNode, node.name);
-            case 233 /* NamedImports */:
-            case 237 /* NamedExports */:
-                return visitNodes(cbNodes, node.elements);
-            case 236 /* ExportDeclaration */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.exportClause) ||
-                    visitNode(cbNode, node.moduleSpecifier);
-            case 234 /* ImportSpecifier */:
-            case 238 /* ExportSpecifier */:
-                return visitNode(cbNode, node.propertyName) ||
-                    visitNode(cbNode, node.name);
-            case 235 /* ExportAssignment */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.expression);
-            case 189 /* TemplateExpression */:
-                return visitNode(cbNode, node.head) || visitNodes(cbNodes, node.templateSpans);
-            case 197 /* TemplateSpan */:
-                return visitNode(cbNode, node.expression) || visitNode(cbNode, node.literal);
-            case 140 /* ComputedPropertyName */:
-                return visitNode(cbNode, node.expression);
-            case 251 /* HeritageClause */:
-                return visitNodes(cbNodes, node.types);
-            case 194 /* ExpressionWithTypeArguments */:
-                return visitNode(cbNode, node.expression) ||
-                    visitNodes(cbNodes, node.typeArguments);
-            case 240 /* ExternalModuleReference */:
-                return visitNode(cbNode, node.expression);
-            case 239 /* MissingDeclaration */:
-                return visitNodes(cbNodes, node.decorators);
-            case 241 /* JsxElement */:
-                return visitNode(cbNode, node.openingElement) ||
-                    visitNodes(cbNodes, node.children) ||
-                    visitNode(cbNode, node.closingElement);
-            case 242 /* JsxSelfClosingElement */:
-            case 243 /* JsxOpeningElement */:
-                return visitNode(cbNode, node.tagName) ||
-                    visitNodes(cbNodes, node.attributes);
-            case 246 /* JsxAttribute */:
-                return visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.initializer);
-            case 247 /* JsxSpreadAttribute */:
-                return visitNode(cbNode, node.expression);
-            case 248 /* JsxExpression */:
-                return visitNode(cbNode, node.expression);
-            case 245 /* JsxClosingElement */:
-                return visitNode(cbNode, node.tagName);
-            case 257 /* JSDocTypeExpression */:
-                return visitNode(cbNode, node.type);
-            case 261 /* JSDocUnionType */:
-                return visitNodes(cbNodes, node.types);
-            case 262 /* JSDocTupleType */:
-                return visitNodes(cbNodes, node.types);
-            case 260 /* JSDocArrayType */:
-                return visitNode(cbNode, node.elementType);
-            case 264 /* JSDocNonNullableType */:
-                return visitNode(cbNode, node.type);
-            case 263 /* JSDocNullableType */:
-                return visitNode(cbNode, node.type);
-            case 265 /* JSDocRecordType */:
-                return visitNode(cbNode, node.literal);
-            case 267 /* JSDocTypeReference */:
-                return visitNode(cbNode, node.name) ||
-                    visitNodes(cbNodes, node.typeArguments);
-            case 268 /* JSDocOptionalType */:
-                return visitNode(cbNode, node.type);
-            case 269 /* JSDocFunctionType */:
-                return visitNodes(cbNodes, node.parameters) ||
-                    visitNode(cbNode, node.type);
-            case 270 /* JSDocVariadicType */:
-                return visitNode(cbNode, node.type);
-            case 271 /* JSDocConstructorType */:
-                return visitNode(cbNode, node.type);
-            case 272 /* JSDocThisType */:
-                return visitNode(cbNode, node.type);
-            case 266 /* JSDocRecordMember */:
-                return visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.type);
-            case 273 /* JSDocComment */:
-                return visitNodes(cbNodes, node.tags);
-            case 275 /* JSDocParameterTag */:
-                return visitNode(cbNode, node.preParameterName) ||
-                    visitNode(cbNode, node.typeExpression) ||
-                    visitNode(cbNode, node.postParameterName);
-            case 276 /* JSDocReturnTag */:
-                return visitNode(cbNode, node.typeExpression);
-            case 277 /* JSDocTypeTag */:
-                return visitNode(cbNode, node.typeExpression);
-            case 278 /* JSDocTemplateTag */:
-                return visitNodes(cbNodes, node.typeParameters);
-            case 279 /* JSDocTypedefTag */:
-                return visitNode(cbNode, node.typeExpression) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.jsDocTypeLiteral);
-            case 281 /* JSDocTypeLiteral */:
-                return visitNodes(cbNodes, node.jsDocPropertyTags);
-            case 280 /* JSDocPropertyTag */:
-                return visitNode(cbNode, node.typeExpression) ||
-                    visitNode(cbNode, node.name);
-            case 288 /* PartiallyEmittedExpression */:
-                return visitNode(cbNode, node.expression);
-            case 282 /* JSDocLiteralType */:
-                return visitNode(cbNode, node.literal);
+        function parseImportClause(identifier, fullStart) {
+            // ImportClause:
+            //  ImportedDefaultBinding
+            //  NameSpaceImport
+            //  NamedImports
+            //  ImportedDefaultBinding, NameSpaceImport
+            //  ImportedDefaultBinding, NamedImports
+            var importClause = createNode(239 /* ImportClause */, fullStart);
+            if (identifier) {
+                // ImportedDefaultBinding:
+                //  ImportedBinding
+                importClause.name = identifier;
+            }
+            // If there was no default import or if there is comma token after default import
+            // parse namespace or named imports
+            if (!importClause.name ||
+                parseOptional(26 /* CommaToken */)) {
+                importClause.namedBindings = token() === 39 /* AsteriskToken */ ? parseNamespaceImport() : parseNamedImportsOrExports(241 /* NamedImports */);
+            }
+            return finishNode(importClause);
         }
-    }
-    ts.forEachChild = forEachChild;
-    function createSourceFile(fileName, sourceText, languageVersion, setParentNodes, scriptKind) {
-        if (setParentNodes === void 0) { setParentNodes = false; }
-        ts.performance.mark("beforeParse");
-        var result = Parser.parseSourceFile(fileName, sourceText, languageVersion, /*syntaxCursor*/ undefined, setParentNodes, scriptKind);
-        ts.performance.mark("afterParse");
-        ts.performance.measure("Parse", "beforeParse", "afterParse");
-        return result;
-    }
-    ts.createSourceFile = createSourceFile;
-    function isExternalModule(file) {
-        return file.externalModuleIndicator !== undefined;
-    }
-    ts.isExternalModule = isExternalModule;
-    // Produces a new SourceFile for the 'newText' provided. The 'textChangeRange' parameter
-    // indicates what changed between the 'text' that this SourceFile has and the 'newText'.
-    // The SourceFile will be created with the compiler attempting to reuse as many nodes from
-    // this file as possible.
-    //
-    // Note: this function mutates nodes from this SourceFile. That means any existing nodes
-    // from this SourceFile that are being held onto may change as a result (including
-    // becoming detached from any SourceFile).  It is recommended that this SourceFile not
-    // be used once 'update' is called on it.
-    function updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks) {
-        return IncrementalParser.updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks);
-    }
-    ts.updateSourceFile = updateSourceFile;
-    /* @internal */
-    function parseIsolatedJSDocComment(content, start, length) {
-        var result = Parser.JSDocParser.parseIsolatedJSDocComment(content, start, length);
-        if (result && result.jsDoc) {
-            // because the jsDocComment was parsed out of the source file, it might
-            // not be covered by the fixupParentReferences.
-            Parser.fixupParentReferences(result.jsDoc);
+        function parseModuleReference() {
+            return isExternalModuleReference()
+                ? parseExternalModuleReference()
+                : parseEntityName(/*allowReservedWords*/ false);
         }
-        return result;
-    }
-    ts.parseIsolatedJSDocComment = parseIsolatedJSDocComment;
-    /* @internal */
-    // Exposed only for testing.
-    function parseJSDocTypeExpressionForTests(content, start, length) {
-        return Parser.JSDocParser.parseJSDocTypeExpressionForTests(content, start, length);
-    }
-    ts.parseJSDocTypeExpressionForTests = parseJSDocTypeExpressionForTests;
-    // Implement the parser as a singleton module.  We do this for perf reasons because creating
-    // parser instances can actually be expensive enough to impact us on projects with many source
-    // files.
-    var Parser;
-    (function (Parser) {
-        // Share a single scanner across all calls to parse a source file.  This helps speed things
-        // up by avoiding the cost of creating/compiling scanners over and over again.
-        var scanner = ts.createScanner(2 /* Latest */, /*skipTrivia*/ true);
-        var disallowInAndDecoratorContext = 32768 /* DisallowInContext */ | 131072 /* DecoratorContext */;
-        // capture constructors in 'initializeState' to avoid null checks
-        var NodeConstructor;
-        var TokenConstructor;
-        var IdentifierConstructor;
-        var SourceFileConstructor;
-        var sourceFile;
-        var parseDiagnostics;
-        var syntaxCursor;
-        var currentToken;
-        var sourceText;
-        var nodeCount;
-        var identifiers;
-        var identifierCount;
-        var parsingContext;
-        // Flags that dictate what parsing context we're in.  For example:
-        // Whether or not we are in strict parsing mode.  All that changes in strict parsing mode is
-        // that some tokens that would be considered identifiers may be considered keywords.
-        //
-        // When adding more parser context flags, consider which is the more common case that the
-        // flag will be in.  This should be the 'false' state for that flag.  The reason for this is
-        // that we don't store data in our nodes unless the value is in the *non-default* state.  So,
-        // for example, more often than code 'allows-in' (or doesn't 'disallow-in').  We opt for
-        // 'disallow-in' set to 'false'.  Otherwise, if we had 'allowsIn' set to 'true', then almost
-        // all nodes would need extra state on them to store this info.
-        //
-        // Note:  'allowIn' and 'allowYield' track 1:1 with the [in] and [yield] concepts in the ES6
-        // grammar specification.
-        //
-        // An important thing about these context concepts.  By default they are effectively inherited
-        // while parsing through every grammar production.  i.e. if you don't change them, then when
-        // you parse a sub-production, it will have the same context values as the parent production.
-        // This is great most of the time.  After all, consider all the 'expression' grammar productions
-        // and how nearly all of them pass along the 'in' and 'yield' context values:
-        //
-        // EqualityExpression[In, Yield] :
-        //      RelationalExpression[?In, ?Yield]
-        //      EqualityExpression[?In, ?Yield] == RelationalExpression[?In, ?Yield]
-        //      EqualityExpression[?In, ?Yield] != RelationalExpression[?In, ?Yield]
-        //      EqualityExpression[?In, ?Yield] === RelationalExpression[?In, ?Yield]
-        //      EqualityExpression[?In, ?Yield] !== RelationalExpression[?In, ?Yield]
-        //
-        // Where you have to be careful is then understanding what the points are in the grammar
-        // where the values are *not* passed along.  For example:
-        //
-        // SingleNameBinding[Yield,GeneratorParameter]
-        //      [+GeneratorParameter]BindingIdentifier[Yield] Initializer[In]opt
-        //      [~GeneratorParameter]BindingIdentifier[?Yield]Initializer[In, ?Yield]opt
-        //
-        // Here this is saying that if the GeneratorParameter context flag is set, that we should
-        // explicitly set the 'yield' context flag to false before calling into the BindingIdentifier
-        // and we should explicitly unset the 'yield' context flag before calling into the Initializer.
-        // production.  Conversely, if the GeneratorParameter context flag is not set, then we
-        // should leave the 'yield' context flag alone.
-        //
-        // Getting this all correct is tricky and requires careful reading of the grammar to
-        // understand when these values should be changed versus when they should be inherited.
-        //
-        // Note: it should not be necessary to save/restore these flags during speculative/lookahead
-        // parsing.  These context flags are naturally stored and restored through normal recursive
-        // descent parsing and unwinding.
-        var contextFlags;
-        // Whether or not we've had a parse error since creating the last AST node.  If we have
-        // encountered an error, it will be stored on the next AST node we create.  Parse errors
-        // can be broken down into three categories:
-        //
-        // 1) An error that occurred during scanning.  For example, an unterminated literal, or a
-        //    character that was completely not understood.
-        //
-        // 2) A token was expected, but was not present.  This type of error is commonly produced
-        //    by the 'parseExpected' function.
-        //
-        // 3) A token was present that no parsing function was able to consume.  This type of error
-        //    only occurs in the 'abortParsingListOrMoveToNextToken' function when the parser
-        //    decides to skip the token.
-        //
-        // In all of these cases, we want to mark the next node as having had an error before it.
-        // With this mark, we can know in incremental settings if this node can be reused, or if
-        // we have to reparse it.  If we don't keep this information around, we may just reuse the
-        // node.  in that event we would then not produce the same errors as we did before, causing
-        // significant confusion problems.
-        //
-        // Note: it is necessary that this value be saved/restored during speculative/lookahead
-        // parsing.  During lookahead parsing, we will often create a node.  That node will have
-        // this value attached, and then this value will be set back to 'false'.  If we decide to
-        // rewind, we must get back to the same value we had prior to the lookahead.
-        //
-        // Note: any errors at the end of the file that do not precede a regular node, should get
-        // attached to the EOF token.
-        var parseErrorBeforeNextFinishedNode = false;
-        function parseSourceFile(fileName, _sourceText, languageVersion, _syntaxCursor, setParentNodes, scriptKind) {
-            scriptKind = ts.ensureScriptKind(fileName, scriptKind);
-            initializeState(fileName, _sourceText, languageVersion, _syntaxCursor, scriptKind);
-            var result = parseSourceFileWorker(fileName, languageVersion, setParentNodes, scriptKind);
-            clearState();
-            return result;
+        function parseExternalModuleReference() {
+            var node = createNode(248 /* ExternalModuleReference */);
+            parseExpected(132 /* RequireKeyword */);
+            parseExpected(19 /* OpenParenToken */);
+            node.expression = parseModuleSpecifier();
+            parseExpected(20 /* CloseParenToken */);
+            return finishNode(node);
         }
-        Parser.parseSourceFile = parseSourceFile;
-        function getLanguageVariant(scriptKind) {
-            // .tsx and .jsx files are treated as jsx language variant.
-            return scriptKind === 4 /* TSX */ || scriptKind === 2 /* JSX */ || scriptKind === 1 /* JS */ ? 1 /* JSX */ : 0 /* Standard */;
+        function parseModuleSpecifier() {
+            if (token() === 9 /* StringLiteral */) {
+                var result = parseLiteralNode();
+                internIdentifier(result.text);
+                return result;
+            }
+            else {
+                // We allow arbitrary expressions here, even though the grammar only allows string
+                // literals.  We check to ensure that it is only a string literal later in the grammar
+                // check pass.
+                return parseExpression();
+            }
         }
-        function initializeState(fileName, _sourceText, languageVersion, _syntaxCursor, scriptKind) {
-            NodeConstructor = ts.objectAllocator.getNodeConstructor();
-            TokenConstructor = ts.objectAllocator.getTokenConstructor();
-            IdentifierConstructor = ts.objectAllocator.getIdentifierConstructor();
-            SourceFileConstructor = ts.objectAllocator.getSourceFileConstructor();
-            sourceText = _sourceText;
-            syntaxCursor = _syntaxCursor;
-            parseDiagnostics = [];
-            parsingContext = 0;
-            identifiers = ts.createMap();
-            identifierCount = 0;
-            nodeCount = 0;
-            contextFlags = scriptKind === 1 /* JS */ || scriptKind === 2 /* JSX */ ? 1048576 /* JavaScriptFile */ : 0 /* None */;
-            parseErrorBeforeNextFinishedNode = false;
-            // Initialize and prime the scanner before parsing the source elements.
-            scanner.setText(sourceText);
-            scanner.setOnError(scanError);
-            scanner.setScriptTarget(languageVersion);
-            scanner.setLanguageVariant(getLanguageVariant(scriptKind));
+        function parseNamespaceImport() {
+            // NameSpaceImport:
+            //  * as ImportedBinding
+            var namespaceImport = createNode(240 /* NamespaceImport */);
+            parseExpected(39 /* AsteriskToken */);
+            parseExpected(118 /* AsKeyword */);
+            namespaceImport.name = parseIdentifier();
+            return finishNode(namespaceImport);
+        }
+        function parseNamedImportsOrExports(kind) {
+            var node = createNode(kind);
+            // NamedImports:
+            //  { }
+            //  { ImportsList }
+            //  { ImportsList, }
+            // ImportsList:
+            //  ImportSpecifier
+            //  ImportsList, ImportSpecifier
+            node.elements = parseBracketedList(22 /* ImportOrExportSpecifiers */, kind === 241 /* NamedImports */ ? parseImportSpecifier : parseExportSpecifier, 17 /* OpenBraceToken */, 18 /* CloseBraceToken */);
+            return finishNode(node);
+        }
+        function parseExportSpecifier() {
+            return parseImportOrExportSpecifier(246 /* ExportSpecifier */);
         }
-        function clearState() {
-            // Clear out the text the scanner is pointing at, so it doesn't keep anything alive unnecessarily.
-            scanner.setText("");
-            scanner.setOnError(undefined);
-            // Clear any data.  We don't want to accidentally hold onto it for too long.
-            parseDiagnostics = undefined;
-            sourceFile = undefined;
-            identifiers = undefined;
-            syntaxCursor = undefined;
-            sourceText = undefined;
+        function parseImportSpecifier() {
+            return parseImportOrExportSpecifier(242 /* ImportSpecifier */);
         }
-        function parseSourceFileWorker(fileName, languageVersion, setParentNodes, scriptKind) {
-            sourceFile = createSourceFile(fileName, languageVersion, scriptKind);
-            sourceFile.flags = contextFlags;
-            // Prime the scanner.
-            nextToken();
-            processReferenceComments(sourceFile);
-            sourceFile.statements = parseList(0 /* SourceElements */, parseStatement);
-            ts.Debug.assert(token() === 1 /* EndOfFileToken */);
-            sourceFile.endOfFileToken = parseTokenNode();
-            setExternalModuleIndicator(sourceFile);
-            sourceFile.nodeCount = nodeCount;
-            sourceFile.identifierCount = identifierCount;
-            sourceFile.identifiers = identifiers;
-            sourceFile.parseDiagnostics = parseDiagnostics;
-            if (setParentNodes) {
-                fixupParentReferences(sourceFile);
+        function parseImportOrExportSpecifier(kind) {
+            var node = createNode(kind);
+            // ImportSpecifier:
+            //   BindingIdentifier
+            //   IdentifierName as BindingIdentifier
+            // ExportSpecifier:
+            //   IdentifierName
+            //   IdentifierName as IdentifierName
+            var checkIdentifierIsKeyword = ts.isKeyword(token()) && !isIdentifier();
+            var checkIdentifierStart = scanner.getTokenPos();
+            var checkIdentifierEnd = scanner.getTextPos();
+            var identifierName = parseIdentifierName();
+            if (token() === 118 /* AsKeyword */) {
+                node.propertyName = identifierName;
+                parseExpected(118 /* AsKeyword */);
+                checkIdentifierIsKeyword = ts.isKeyword(token()) && !isIdentifier();
+                checkIdentifierStart = scanner.getTokenPos();
+                checkIdentifierEnd = scanner.getTextPos();
+                node.name = parseIdentifierName();
             }
-            return sourceFile;
+            else {
+                node.name = identifierName;
+            }
+            if (kind === 242 /* ImportSpecifier */ && checkIdentifierIsKeyword) {
+                // Report error identifier expected
+                parseErrorAtPosition(checkIdentifierStart, checkIdentifierEnd - checkIdentifierStart, ts.Diagnostics.Identifier_expected);
+            }
+            return finishNode(node);
         }
-        function addJSDocComment(node) {
-            var comments = ts.getJsDocCommentsFromText(node, sourceFile.text);
-            if (comments) {
-                for (var _i = 0, comments_2 = comments; _i < comments_2.length; _i++) {
-                    var comment = comments_2[_i];
-                    var jsDoc = JSDocParser.parseJSDocComment(node, comment.pos, comment.end - comment.pos);
-                    if (!jsDoc) {
+        function parseExportDeclaration(fullStart, decorators, modifiers) {
+            var node = createNode(244 /* ExportDeclaration */, fullStart);
+            node.decorators = decorators;
+            node.modifiers = modifiers;
+            if (parseOptional(39 /* AsteriskToken */)) {
+                parseExpected(140 /* FromKeyword */);
+                node.moduleSpecifier = parseModuleSpecifier();
+            }
+            else {
+                node.exportClause = parseNamedImportsOrExports(245 /* NamedExports */);
+                // It is not uncommon to accidentally omit the 'from' keyword. Additionally, in editing scenarios,
+                // the 'from' keyword can be parsed as a named export when the export clause is unterminated (i.e. `export { from "moduleName";`)
+                // If we don't have a 'from' keyword, see if we have a string literal such that ASI won't take effect.
+                if (token() === 140 /* FromKeyword */ || (token() === 9 /* StringLiteral */ && !scanner.hasPrecedingLineBreak())) {
+                    parseExpected(140 /* FromKeyword */);
+                    node.moduleSpecifier = parseModuleSpecifier();
+                }
+            }
+            parseSemicolon();
+            return finishNode(node);
+        }
+        function parseExportAssignment(fullStart, decorators, modifiers) {
+            var node = createNode(243 /* ExportAssignment */, fullStart);
+            node.decorators = decorators;
+            node.modifiers = modifiers;
+            if (parseOptional(58 /* EqualsToken */)) {
+                node.isExportEquals = true;
+            }
+            else {
+                parseExpected(79 /* DefaultKeyword */);
+            }
+            node.expression = parseAssignmentExpressionOrHigher();
+            parseSemicolon();
+            return finishNode(node);
+        }
+        function processReferenceComments(sourceFile) {
+            var triviaScanner = ts.createScanner(sourceFile.languageVersion, /*skipTrivia*/ false, 0 /* Standard */, sourceText);
+            var referencedFiles = [];
+            var typeReferenceDirectives = [];
+            var amdDependencies = [];
+            var amdModuleName;
+            var checkJsDirective = undefined;
+            // Keep scanning all the leading trivia in the file until we get to something that
+            // isn't trivia.  Any single line comment will be analyzed to see if it is a
+            // reference comment.
+            while (true) {
+                var kind = triviaScanner.scan();
+                if (kind !== 2 /* SingleLineCommentTrivia */) {
+                    if (ts.isTrivia(kind)) {
                         continue;
                     }
-                    if (!node.jsDocComments) {
-                        node.jsDocComments = [];
+                    else {
+                        break;
+                    }
+                }
+                var range = {
+                    kind: triviaScanner.getToken(),
+                    pos: triviaScanner.getTokenPos(),
+                    end: triviaScanner.getTextPos(),
+                };
+                var comment = sourceText.substring(range.pos, range.end);
+                var referencePathMatchResult = ts.getFileReferenceFromReferencePath(comment, range);
+                if (referencePathMatchResult) {
+                    var fileReference = referencePathMatchResult.fileReference;
+                    sourceFile.hasNoDefaultLib = referencePathMatchResult.isNoDefaultLib;
+                    var diagnosticMessage = referencePathMatchResult.diagnosticMessage;
+                    if (fileReference) {
+                        if (referencePathMatchResult.isTypeReferenceDirective) {
+                            typeReferenceDirectives.push(fileReference);
+                        }
+                        else {
+                            referencedFiles.push(fileReference);
+                        }
+                    }
+                    if (diagnosticMessage) {
+                        parseDiagnostics.push(ts.createFileDiagnostic(sourceFile, range.pos, range.end - range.pos, diagnosticMessage));
+                    }
+                }
+                else {
+                    var amdModuleNameRegEx = /^\/\/\/\s*<amd-module\s+name\s*=\s*('|")(.+?)\1/gim;
+                    var amdModuleNameMatchResult = amdModuleNameRegEx.exec(comment);
+                    if (amdModuleNameMatchResult) {
+                        if (amdModuleName) {
+                            parseDiagnostics.push(ts.createFileDiagnostic(sourceFile, range.pos, range.end - range.pos, ts.Diagnostics.An_AMD_module_cannot_have_multiple_name_assignments));
+                        }
+                        amdModuleName = amdModuleNameMatchResult[2];
+                    }
+                    var amdDependencyRegEx = /^\/\/\/\s*<amd-dependency\s/gim;
+                    var pathRegex = /\spath\s*=\s*('|")(.+?)\1/gim;
+                    var nameRegex = /\sname\s*=\s*('|")(.+?)\1/gim;
+                    var amdDependencyMatchResult = amdDependencyRegEx.exec(comment);
+                    if (amdDependencyMatchResult) {
+                        var pathMatchResult = pathRegex.exec(comment);
+                        var nameMatchResult = nameRegex.exec(comment);
+                        if (pathMatchResult) {
+                            var amdDependency = { path: pathMatchResult[2], name: nameMatchResult ? nameMatchResult[2] : undefined };
+                            amdDependencies.push(amdDependency);
+                        }
+                    }
+                    var checkJsDirectiveRegEx = /^\/\/\/?\s*(@ts-check|@ts-nocheck)\s*$/gim;
+                    var checkJsDirectiveMatchResult = checkJsDirectiveRegEx.exec(comment);
+                    if (checkJsDirectiveMatchResult) {
+                        checkJsDirective = {
+                            enabled: ts.compareStrings(checkJsDirectiveMatchResult[1], "@ts-check", /*ignoreCase*/ true) === 0 /* EqualTo */,
+                            end: range.end,
+                            pos: range.pos
+                        };
+                    }
+                }
+            }
+            sourceFile.referencedFiles = referencedFiles;
+            sourceFile.typeReferenceDirectives = typeReferenceDirectives;
+            sourceFile.amdDependencies = amdDependencies;
+            sourceFile.moduleName = amdModuleName;
+            sourceFile.checkJsDirective = checkJsDirective;
+        }
+        function setExternalModuleIndicator(sourceFile) {
+            sourceFile.externalModuleIndicator = ts.forEach(sourceFile.statements, function (node) {
+                return ts.hasModifier(node, 1 /* Export */)
+                    || node.kind === 237 /* ImportEqualsDeclaration */ && node.moduleReference.kind === 248 /* ExternalModuleReference */
+                    || node.kind === 238 /* ImportDeclaration */
+                    || node.kind === 243 /* ExportAssignment */
+                    || node.kind === 244 /* ExportDeclaration */
+                    ? node
+                    : undefined;
+            });
+        }
+        var ParsingContext;
+        (function (ParsingContext) {
+            ParsingContext[ParsingContext["SourceElements"] = 0] = "SourceElements";
+            ParsingContext[ParsingContext["BlockStatements"] = 1] = "BlockStatements";
+            ParsingContext[ParsingContext["SwitchClauses"] = 2] = "SwitchClauses";
+            ParsingContext[ParsingContext["SwitchClauseStatements"] = 3] = "SwitchClauseStatements";
+            ParsingContext[ParsingContext["TypeMembers"] = 4] = "TypeMembers";
+            ParsingContext[ParsingContext["ClassMembers"] = 5] = "ClassMembers";
+            ParsingContext[ParsingContext["EnumMembers"] = 6] = "EnumMembers";
+            ParsingContext[ParsingContext["HeritageClauseElement"] = 7] = "HeritageClauseElement";
+            ParsingContext[ParsingContext["VariableDeclarations"] = 8] = "VariableDeclarations";
+            ParsingContext[ParsingContext["ObjectBindingElements"] = 9] = "ObjectBindingElements";
+            ParsingContext[ParsingContext["ArrayBindingElements"] = 10] = "ArrayBindingElements";
+            ParsingContext[ParsingContext["ArgumentExpressions"] = 11] = "ArgumentExpressions";
+            ParsingContext[ParsingContext["ObjectLiteralMembers"] = 12] = "ObjectLiteralMembers";
+            ParsingContext[ParsingContext["JsxAttributes"] = 13] = "JsxAttributes";
+            ParsingContext[ParsingContext["JsxChildren"] = 14] = "JsxChildren";
+            ParsingContext[ParsingContext["ArrayLiteralMembers"] = 15] = "ArrayLiteralMembers";
+            ParsingContext[ParsingContext["Parameters"] = 16] = "Parameters";
+            ParsingContext[ParsingContext["RestProperties"] = 17] = "RestProperties";
+            ParsingContext[ParsingContext["TypeParameters"] = 18] = "TypeParameters";
+            ParsingContext[ParsingContext["TypeArguments"] = 19] = "TypeArguments";
+            ParsingContext[ParsingContext["TupleElementTypes"] = 20] = "TupleElementTypes";
+            ParsingContext[ParsingContext["HeritageClauses"] = 21] = "HeritageClauses";
+            ParsingContext[ParsingContext["ImportOrExportSpecifiers"] = 22] = "ImportOrExportSpecifiers";
+            ParsingContext[ParsingContext["JSDocFunctionParameters"] = 23] = "JSDocFunctionParameters";
+            ParsingContext[ParsingContext["JSDocTypeArguments"] = 24] = "JSDocTypeArguments";
+            ParsingContext[ParsingContext["JSDocRecordMembers"] = 25] = "JSDocRecordMembers";
+            ParsingContext[ParsingContext["JSDocTupleTypes"] = 26] = "JSDocTupleTypes";
+            ParsingContext[ParsingContext["Count"] = 27] = "Count"; // Number of parsing contexts
+        })(ParsingContext || (ParsingContext = {}));
+        var Tristate;
+        (function (Tristate) {
+            Tristate[Tristate["False"] = 0] = "False";
+            Tristate[Tristate["True"] = 1] = "True";
+            Tristate[Tristate["Unknown"] = 2] = "Unknown";
+        })(Tristate || (Tristate = {}));
+        var JSDocParser;
+        (function (JSDocParser) {
+            function isJSDocType() {
+                switch (token()) {
+                    case 39 /* AsteriskToken */:
+                    case 55 /* QuestionToken */:
+                    case 19 /* OpenParenToken */:
+                    case 21 /* OpenBracketToken */:
+                    case 51 /* ExclamationToken */:
+                    case 17 /* OpenBraceToken */:
+                    case 89 /* FunctionKeyword */:
+                    case 24 /* DotDotDotToken */:
+                    case 94 /* NewKeyword */:
+                    case 99 /* ThisKeyword */:
+                        return true;
+                }
+                return ts.tokenIsIdentifierOrKeyword(token());
+            }
+            JSDocParser.isJSDocType = isJSDocType;
+            function parseJSDocTypeExpressionForTests(content, start, length) {
+                initializeState(content, 5 /* Latest */, /*_syntaxCursor:*/ undefined, 1 /* JS */);
+                sourceFile = createSourceFile("file.js", 5 /* Latest */, 1 /* JS */);
+                scanner.setText(content, start, length);
+                currentToken = scanner.scan();
+                var jsDocTypeExpression = parseJSDocTypeExpression();
+                var diagnostics = parseDiagnostics;
+                clearState();
+                return jsDocTypeExpression ? { jsDocTypeExpression: jsDocTypeExpression, diagnostics: diagnostics } : undefined;
+            }
+            JSDocParser.parseJSDocTypeExpressionForTests = parseJSDocTypeExpressionForTests;
+            // Parses out a JSDoc type expression.
+            /* @internal */
+            function parseJSDocTypeExpression() {
+                var result = createNode(267 /* JSDocTypeExpression */, scanner.getTokenPos());
+                parseExpected(17 /* OpenBraceToken */);
+                result.type = parseJSDocTopLevelType();
+                parseExpected(18 /* CloseBraceToken */);
+                fixupParentReferences(result);
+                return finishNode(result);
+            }
+            JSDocParser.parseJSDocTypeExpression = parseJSDocTypeExpression;
+            function parseJSDocTopLevelType() {
+                var type = parseJSDocType();
+                if (token() === 49 /* BarToken */) {
+                    var unionType = createNode(271 /* JSDocUnionType */, type.pos);
+                    unionType.types = parseJSDocTypeList(type);
+                    type = finishNode(unionType);
+                }
+                if (token() === 58 /* EqualsToken */) {
+                    var optionalType = createNode(278 /* JSDocOptionalType */, type.pos);
+                    nextToken();
+                    optionalType.type = type;
+                    type = finishNode(optionalType);
+                }
+                return type;
+            }
+            function parseJSDocType() {
+                var type = parseBasicTypeExpression();
+                while (true) {
+                    if (token() === 21 /* OpenBracketToken */) {
+                        var arrayType = createNode(270 /* JSDocArrayType */, type.pos);
+                        arrayType.elementType = type;
+                        nextToken();
+                        parseExpected(22 /* CloseBracketToken */);
+                        type = finishNode(arrayType);
+                    }
+                    else if (token() === 55 /* QuestionToken */) {
+                        var nullableType = createNode(273 /* JSDocNullableType */, type.pos);
+                        nullableType.type = type;
+                        nextToken();
+                        type = finishNode(nullableType);
+                    }
+                    else if (token() === 51 /* ExclamationToken */) {
+                        var nonNullableType = createNode(274 /* JSDocNonNullableType */, type.pos);
+                        nonNullableType.type = type;
+                        nextToken();
+                        type = finishNode(nonNullableType);
+                    }
+                    else {
+                        break;
+                    }
+                }
+                return type;
+            }
+            function parseBasicTypeExpression() {
+                switch (token()) {
+                    case 39 /* AsteriskToken */:
+                        return parseJSDocAllType();
+                    case 55 /* QuestionToken */:
+                        return parseJSDocUnknownOrNullableType();
+                    case 19 /* OpenParenToken */:
+                        return parseJSDocUnionType();
+                    case 21 /* OpenBracketToken */:
+                        return parseJSDocTupleType();
+                    case 51 /* ExclamationToken */:
+                        return parseJSDocNonNullableType();
+                    case 17 /* OpenBraceToken */:
+                        return parseJSDocRecordType();
+                    case 89 /* FunctionKeyword */:
+                        if (lookAhead(nextTokenIsOpenParen)) {
+                            return parseJSDocFunctionType();
+                        }
+                        break;
+                    case 24 /* DotDotDotToken */:
+                        return parseJSDocVariadicType();
+                    case 94 /* NewKeyword */:
+                        return parseJSDocConstructorType();
+                    case 99 /* ThisKeyword */:
+                        return parseJSDocThisType();
+                    case 119 /* AnyKeyword */:
+                    case 136 /* StringKeyword */:
+                    case 133 /* NumberKeyword */:
+                    case 122 /* BooleanKeyword */:
+                    case 137 /* SymbolKeyword */:
+                    case 105 /* VoidKeyword */:
+                    case 95 /* NullKeyword */:
+                    case 139 /* UndefinedKeyword */:
+                    case 130 /* NeverKeyword */:
+                        return parseTokenNode();
+                    case 9 /* StringLiteral */:
+                    case 8 /* NumericLiteral */:
+                    case 101 /* TrueKeyword */:
+                    case 86 /* FalseKeyword */:
+                        return parseJSDocLiteralType();
+                }
+                return parseJSDocTypeReference();
+            }
+            function parseJSDocThisType() {
+                var result = createNode(282 /* JSDocThisType */);
+                nextToken();
+                parseExpected(56 /* ColonToken */);
+                result.type = parseJSDocType();
+                return finishNode(result);
+            }
+            function parseJSDocConstructorType() {
+                var result = createNode(281 /* JSDocConstructorType */);
+                nextToken();
+                parseExpected(56 /* ColonToken */);
+                result.type = parseJSDocType();
+                return finishNode(result);
+            }
+            function parseJSDocVariadicType() {
+                var result = createNode(280 /* JSDocVariadicType */);
+                nextToken();
+                result.type = parseJSDocType();
+                return finishNode(result);
+            }
+            function parseJSDocFunctionType() {
+                var result = createNode(279 /* JSDocFunctionType */);
+                nextToken();
+                parseExpected(19 /* OpenParenToken */);
+                result.parameters = parseDelimitedList(23 /* JSDocFunctionParameters */, parseJSDocParameter);
+                checkForTrailingComma(result.parameters);
+                parseExpected(20 /* CloseParenToken */);
+                if (token() === 56 /* ColonToken */) {
+                    nextToken();
+                    result.type = parseJSDocType();
+                }
+                return finishNode(result);
+            }
+            function parseJSDocParameter() {
+                var parameter = createNode(146 /* Parameter */);
+                parameter.type = parseJSDocType();
+                if (parseOptional(58 /* EqualsToken */)) {
+                    // TODO(rbuckton): Can this be changed to SyntaxKind.QuestionToken?
+                    parameter.questionToken = createNode(58 /* EqualsToken */);
+                }
+                return finishNode(parameter);
+            }
+            function parseJSDocTypeReference() {
+                var result = createNode(277 /* JSDocTypeReference */);
+                result.name = parseSimplePropertyName();
+                if (token() === 27 /* LessThanToken */) {
+                    result.typeArguments = parseTypeArguments();
+                }
+                else {
+                    while (parseOptional(23 /* DotToken */)) {
+                        if (token() === 27 /* LessThanToken */) {
+                            result.typeArguments = parseTypeArguments();
+                            break;
+                        }
+                        else {
+                            result.name = parseQualifiedName(result.name);
+                        }
+                    }
+                }
+                return finishNode(result);
+            }
+            function parseTypeArguments() {
+                // Move past the <
+                nextToken();
+                var typeArguments = parseDelimitedList(24 /* JSDocTypeArguments */, parseJSDocType);
+                checkForTrailingComma(typeArguments);
+                checkForEmptyTypeArgumentList(typeArguments);
+                parseExpected(29 /* GreaterThanToken */);
+                return typeArguments;
+            }
+            function checkForEmptyTypeArgumentList(typeArguments) {
+                if (parseDiagnostics.length === 0 && typeArguments && typeArguments.length === 0) {
+                    var start = typeArguments.pos - "<".length;
+                    var end = ts.skipTrivia(sourceText, typeArguments.end) + ">".length;
+                    return parseErrorAtPosition(start, end - start, ts.Diagnostics.Type_argument_list_cannot_be_empty);
+                }
+            }
+            function parseQualifiedName(left) {
+                var result = createNode(143 /* QualifiedName */, left.pos);
+                result.left = left;
+                result.right = parseIdentifierName();
+                return finishNode(result);
+            }
+            function parseJSDocRecordType() {
+                var result = createNode(275 /* JSDocRecordType */);
+                result.literal = parseTypeLiteral();
+                return finishNode(result);
+            }
+            function parseJSDocNonNullableType() {
+                var result = createNode(274 /* JSDocNonNullableType */);
+                nextToken();
+                result.type = parseJSDocType();
+                return finishNode(result);
+            }
+            function parseJSDocTupleType() {
+                var result = createNode(272 /* JSDocTupleType */);
+                nextToken();
+                result.types = parseDelimitedList(26 /* JSDocTupleTypes */, parseJSDocType);
+                checkForTrailingComma(result.types);
+                parseExpected(22 /* CloseBracketToken */);
+                return finishNode(result);
+            }
+            function checkForTrailingComma(list) {
+                if (parseDiagnostics.length === 0 && list.hasTrailingComma) {
+                    var start = list.end - ",".length;
+                    parseErrorAtPosition(start, ",".length, ts.Diagnostics.Trailing_comma_not_allowed);
+                }
+            }
+            function parseJSDocUnionType() {
+                var result = createNode(271 /* JSDocUnionType */);
+                nextToken();
+                result.types = parseJSDocTypeList(parseJSDocType());
+                parseExpected(20 /* CloseParenToken */);
+                return finishNode(result);
+            }
+            function parseJSDocTypeList(firstType) {
+                ts.Debug.assert(!!firstType);
+                var types = createNodeArray([firstType], firstType.pos);
+                while (parseOptional(49 /* BarToken */)) {
+                    types.push(parseJSDocType());
+                }
+                types.end = scanner.getStartPos();
+                return types;
+            }
+            function parseJSDocAllType() {
+                var result = createNode(268 /* JSDocAllType */);
+                nextToken();
+                return finishNode(result);
+            }
+            function parseJSDocLiteralType() {
+                var result = createNode(294 /* JSDocLiteralType */);
+                result.literal = parseLiteralTypeNode();
+                return finishNode(result);
+            }
+            function parseJSDocUnknownOrNullableType() {
+                var pos = scanner.getStartPos();
+                // skip the ?
+                nextToken();
+                // Need to lookahead to decide if this is a nullable or unknown type.
+                // Here are cases where we'll pick the unknown type:
+                //
+                //      Foo(?,
+                //      { a: ? }
+                //      Foo(?)
+                //      Foo<?>
+                //      Foo(?=
+                //      (?|
+                if (token() === 26 /* CommaToken */ ||
+                    token() === 18 /* CloseBraceToken */ ||
+                    token() === 20 /* CloseParenToken */ ||
+                    token() === 29 /* GreaterThanToken */ ||
+                    token() === 58 /* EqualsToken */ ||
+                    token() === 49 /* BarToken */) {
+                    var result = createNode(269 /* JSDocUnknownType */, pos);
+                    return finishNode(result);
+                }
+                else {
+                    var result = createNode(273 /* JSDocNullableType */, pos);
+                    result.type = parseJSDocType();
+                    return finishNode(result);
+                }
+            }
+            function parseIsolatedJSDocComment(content, start, length) {
+                initializeState(content, 5 /* Latest */, /*_syntaxCursor:*/ undefined, 1 /* JS */);
+                sourceFile = { languageVariant: 0 /* Standard */, text: content };
+                var jsDoc = parseJSDocCommentWorker(start, length);
+                var diagnostics = parseDiagnostics;
+                clearState();
+                return jsDoc ? { jsDoc: jsDoc, diagnostics: diagnostics } : undefined;
+            }
+            JSDocParser.parseIsolatedJSDocComment = parseIsolatedJSDocComment;
+            function parseJSDocComment(parent, start, length) {
+                var saveToken = currentToken;
+                var saveParseDiagnosticsLength = parseDiagnostics.length;
+                var saveParseErrorBeforeNextFinishedNode = parseErrorBeforeNextFinishedNode;
+                var comment = parseJSDocCommentWorker(start, length);
+                if (comment) {
+                    comment.parent = parent;
+                }
+                if (ts.isInJavaScriptFile(parent)) {
+                    if (!sourceFile.jsDocDiagnostics) {
+                        sourceFile.jsDocDiagnostics = [];
+                    }
+                    (_a = sourceFile.jsDocDiagnostics).push.apply(_a, parseDiagnostics);
+                }
+                currentToken = saveToken;
+                parseDiagnostics.length = saveParseDiagnosticsLength;
+                parseErrorBeforeNextFinishedNode = saveParseErrorBeforeNextFinishedNode;
+                return comment;
+                var _a;
+            }
+            JSDocParser.parseJSDocComment = parseJSDocComment;
+            var JSDocState;
+            (function (JSDocState) {
+                JSDocState[JSDocState["BeginningOfLine"] = 0] = "BeginningOfLine";
+                JSDocState[JSDocState["SawAsterisk"] = 1] = "SawAsterisk";
+                JSDocState[JSDocState["SavingComments"] = 2] = "SavingComments";
+            })(JSDocState || (JSDocState = {}));
+            function parseJSDocCommentWorker(start, length) {
+                var content = sourceText;
+                start = start || 0;
+                var end = length === undefined ? content.length : start + length;
+                length = end - start;
+                ts.Debug.assert(start >= 0);
+                ts.Debug.assert(start <= end);
+                ts.Debug.assert(end <= content.length);
+                var tags;
+                var comments = [];
+                var result;
+                // Check for /** (JSDoc opening part)
+                if (!isJsDocStart(content, start)) {
+                    return result;
+                }
+                // + 3 for leading /**, - 5 in total for /** */
+                scanner.scanRange(start + 3, length - 5, function () {
+                    // Initially we can parse out a tag.  We also have seen a starting asterisk.
+                    // This is so that /** * @type */ doesn't parse.
+                    var advanceToken = true;
+                    var state = 1 /* SawAsterisk */;
+                    var margin = undefined;
+                    // + 4 for leading '/** '
+                    var indent = start - Math.max(content.lastIndexOf("\n", start), 0) + 4;
+                    function pushComment(text) {
+                        if (!margin) {
+                            margin = indent;
+                        }
+                        comments.push(text);
+                        indent += text.length;
+                    }
+                    nextJSDocToken();
+                    while (token() === 5 /* WhitespaceTrivia */) {
+                        nextJSDocToken();
+                    }
+                    if (token() === 4 /* NewLineTrivia */) {
+                        state = 0 /* BeginningOfLine */;
+                        indent = 0;
+                        nextJSDocToken();
+                    }
+                    while (token() !== 1 /* EndOfFileToken */) {
+                        switch (token()) {
+                            case 57 /* AtToken */:
+                                if (state === 0 /* BeginningOfLine */ || state === 1 /* SawAsterisk */) {
+                                    removeTrailingNewlines(comments);
+                                    parseTag(indent);
+                                    // NOTE: According to usejsdoc.org, a tag goes to end of line, except the last tag.
+                                    // Real-world comments may break this rule, so "BeginningOfLine" will not be a real line beginning
+                                    // for malformed examples like `/** @param {string} x @returns {number} the length */`
+                                    state = 0 /* BeginningOfLine */;
+                                    advanceToken = false;
+                                    margin = undefined;
+                                    indent++;
+                                }
+                                else {
+                                    pushComment(scanner.getTokenText());
+                                }
+                                break;
+                            case 4 /* NewLineTrivia */:
+                                comments.push(scanner.getTokenText());
+                                state = 0 /* BeginningOfLine */;
+                                indent = 0;
+                                break;
+                            case 39 /* AsteriskToken */:
+                                var asterisk = scanner.getTokenText();
+                                if (state === 1 /* SawAsterisk */ || state === 2 /* SavingComments */) {
+                                    // If we've already seen an asterisk, then we can no longer parse a tag on this line
+                                    state = 2 /* SavingComments */;
+                                    pushComment(asterisk);
+                                }
+                                else {
+                                    // Ignore the first asterisk on a line
+                                    state = 1 /* SawAsterisk */;
+                                    indent += asterisk.length;
+                                }
+                                break;
+                            case 71 /* Identifier */:
+                                // Anything else is doc comment text. We just save it. Because it
+                                // wasn't a tag, we can no longer parse a tag on this line until we hit the next
+                                // line break.
+                                pushComment(scanner.getTokenText());
+                                state = 2 /* SavingComments */;
+                                break;
+                            case 5 /* WhitespaceTrivia */:
+                                // only collect whitespace if we're already saving comments or have just crossed the comment indent margin
+                                var whitespace = scanner.getTokenText();
+                                if (state === 2 /* SavingComments */) {
+                                    comments.push(whitespace);
+                                }
+                                else if (margin !== undefined && indent + whitespace.length > margin) {
+                                    comments.push(whitespace.slice(margin - indent - 1));
+                                }
+                                indent += whitespace.length;
+                                break;
+                            case 1 /* EndOfFileToken */:
+                                break;
+                            default:
+                                // anything other than whitespace or asterisk at the beginning of the line starts the comment text
+                                state = 2 /* SavingComments */;
+                                pushComment(scanner.getTokenText());
+                                break;
+                        }
+                        if (advanceToken) {
+                            nextJSDocToken();
+                        }
+                        else {
+                            advanceToken = true;
+                        }
+                    }
+                    removeLeadingNewlines(comments);
+                    removeTrailingNewlines(comments);
+                    result = createJSDocComment();
+                });
+                return result;
+                function removeLeadingNewlines(comments) {
+                    while (comments.length && (comments[0] === "\n" || comments[0] === "\r")) {
+                        comments.shift();
                     }
-                    node.jsDocComments.push(jsDoc);
                 }
-            }
-            return node;
-        }
-        function fixupParentReferences(rootNode) {
-            // normally parent references are set during binding. However, for clients that only need
-            // a syntax tree, and no semantic features, then the binding process is an unnecessary
-            // overhead.  This functions allows us to set all the parents, without all the expense of
-            // binding.
-            var parent = rootNode;
-            forEachChild(rootNode, visitNode);
-            return;
-            function visitNode(n) {
-                // walk down setting parents that differ from the parent we think it should be.  This
-                // allows us to quickly bail out of setting parents for subtrees during incremental
-                // parsing
-                if (n.parent !== parent) {
-                    n.parent = parent;
-                    var saveParent = parent;
-                    parent = n;
-                    forEachChild(n, visitNode);
-                    if (n.jsDocComments) {
-                        for (var _i = 0, _a = n.jsDocComments; _i < _a.length; _i++) {
-                            var jsDocComment = _a[_i];
-                            jsDocComment.parent = n;
-                            parent = jsDocComment;
-                            forEachChild(jsDocComment, visitNode);
+                function removeTrailingNewlines(comments) {
+                    while (comments.length && (comments[comments.length - 1] === "\n" || comments[comments.length - 1] === "\r")) {
+                        comments.pop();
+                    }
+                }
+                function isJsDocStart(content, start) {
+                    return content.charCodeAt(start) === 47 /* slash */ &&
+                        content.charCodeAt(start + 1) === 42 /* asterisk */ &&
+                        content.charCodeAt(start + 2) === 42 /* asterisk */ &&
+                        content.charCodeAt(start + 3) !== 42 /* asterisk */;
+                }
+                function createJSDocComment() {
+                    var result = createNode(283 /* JSDocComment */, start);
+                    result.tags = tags;
+                    result.comment = comments.length ? comments.join("") : undefined;
+                    return finishNode(result, end);
+                }
+                function skipWhitespace() {
+                    while (token() === 5 /* WhitespaceTrivia */ || token() === 4 /* NewLineTrivia */) {
+                        nextJSDocToken();
+                    }
+                }
+                function parseTag(indent) {
+                    ts.Debug.assert(token() === 57 /* AtToken */);
+                    var atToken = createNode(57 /* AtToken */, scanner.getTokenPos());
+                    atToken.end = scanner.getTextPos();
+                    nextJSDocToken();
+                    var tagName = parseJSDocIdentifierName();
+                    skipWhitespace();
+                    if (!tagName) {
+                        return;
+                    }
+                    var tag;
+                    if (tagName) {
+                        switch (tagName.text) {
+                            case "augments":
+                                tag = parseAugmentsTag(atToken, tagName);
+                                break;
+                            case "class":
+                            case "constructor":
+                                tag = parseClassTag(atToken, tagName);
+                                break;
+                            case "arg":
+                            case "argument":
+                            case "param":
+                                tag = parseParameterOrPropertyTag(atToken, tagName, /*shouldParseParamTag*/ true);
+                                break;
+                            case "return":
+                            case "returns":
+                                tag = parseReturnTag(atToken, tagName);
+                                break;
+                            case "template":
+                                tag = parseTemplateTag(atToken, tagName);
+                                break;
+                            case "type":
+                                tag = parseTypeTag(atToken, tagName);
+                                break;
+                            case "typedef":
+                                tag = parseTypedefTag(atToken, tagName);
+                                break;
+                            default:
+                                tag = parseUnknownTag(atToken, tagName);
+                                break;
                         }
                     }
-                    parent = saveParent;
+                    else {
+                        tag = parseUnknownTag(atToken, tagName);
+                    }
+                    if (!tag) {
+                        // a badly malformed tag should not be added to the list of tags
+                        return;
+                    }
+                    addTag(tag, parseTagComments(indent + tag.end - tag.pos));
                 }
+                function parseTagComments(indent) {
+                    var comments = [];
+                    var state = 0 /* BeginningOfLine */;
+                    var margin;
+                    function pushComment(text) {
+                        if (!margin) {
+                            margin = indent;
+                        }
+                        comments.push(text);
+                        indent += text.length;
+                    }
+                    while (token() !== 57 /* AtToken */ && token() !== 1 /* EndOfFileToken */) {
+                        switch (token()) {
+                            case 4 /* NewLineTrivia */:
+                                if (state >= 1 /* SawAsterisk */) {
+                                    state = 0 /* BeginningOfLine */;
+                                    comments.push(scanner.getTokenText());
+                                }
+                                indent = 0;
+                                break;
+                            case 57 /* AtToken */:
+                                // Done
+                                break;
+                            case 5 /* WhitespaceTrivia */:
+                                if (state === 2 /* SavingComments */) {
+                                    pushComment(scanner.getTokenText());
+                                }
+                                else {
+                                    var whitespace = scanner.getTokenText();
+                                    // if the whitespace crosses the margin, take only the whitespace that passes the margin
+                                    if (margin !== undefined && indent + whitespace.length > margin) {
+                                        comments.push(whitespace.slice(margin - indent - 1));
+                                    }
+                                    indent += whitespace.length;
+                                }
+                                break;
+                            case 39 /* AsteriskToken */:
+                                if (state === 0 /* BeginningOfLine */) {
+                                    // leading asterisks start recording on the *next* (non-whitespace) token
+                                    state = 1 /* SawAsterisk */;
+                                    indent += scanner.getTokenText().length;
+                                    break;
+                                }
+                            // record the * as a comment
+                            // falls through
+                            default:
+                                state = 2 /* SavingComments */; // leading identifiers start recording as well
+                                pushComment(scanner.getTokenText());
+                                break;
+                        }
+                        if (token() === 57 /* AtToken */) {
+                            // Done
+                            break;
+                        }
+                        nextJSDocToken();
+                    }
+                    removeLeadingNewlines(comments);
+                    removeTrailingNewlines(comments);
+                    return comments;
+                }
+                function parseUnknownTag(atToken, tagName) {
+                    var result = createNode(284 /* JSDocTag */, atToken.pos);
+                    result.atToken = atToken;
+                    result.tagName = tagName;
+                    return finishNode(result);
+                }
+                function addTag(tag, comments) {
+                    tag.comment = comments.join("");
+                    if (!tags) {
+                        tags = createNodeArray([tag], tag.pos);
+                    }
+                    else {
+                        tags.push(tag);
+                    }
+                    tags.end = tag.end;
+                }
+                function tryParseTypeExpression() {
+                    return tryParse(function () {
+                        skipWhitespace();
+                        if (token() !== 17 /* OpenBraceToken */) {
+                            return undefined;
+                        }
+                        return parseJSDocTypeExpression();
+                    });
+                }
+                function parseBracketNameInPropertyAndParamTag() {
+                    // Looking for something like '[foo]' or 'foo'
+                    var isBracketed = parseOptional(21 /* OpenBracketToken */);
+                    var name = parseJSDocIdentifierName(/*createIfMissing*/ true);
+                    if (isBracketed) {
+                        skipWhitespace();
+                        // May have an optional default, e.g. '[foo = 42]'
+                        if (parseOptionalToken(58 /* EqualsToken */)) {
+                            parseExpression();
+                        }
+                        parseExpected(22 /* CloseBracketToken */);
+                    }
+                    return { name: name, isBracketed: isBracketed };
+                }
+                function parseParameterOrPropertyTag(atToken, tagName, shouldParseParamTag) {
+                    var typeExpression = tryParseTypeExpression();
+                    skipWhitespace();
+                    var _a = parseBracketNameInPropertyAndParamTag(), name = _a.name, isBracketed = _a.isBracketed;
+                    skipWhitespace();
+                    var preName, postName;
+                    if (typeExpression) {
+                        postName = name;
+                    }
+                    else {
+                        preName = name;
+                        typeExpression = tryParseTypeExpression();
+                    }
+                    var result = shouldParseParamTag ?
+                        createNode(287 /* JSDocParameterTag */, atToken.pos) :
+                        createNode(292 /* JSDocPropertyTag */, atToken.pos);
+                    result.atToken = atToken;
+                    result.tagName = tagName;
+                    result.preParameterName = preName;
+                    result.typeExpression = typeExpression;
+                    result.postParameterName = postName;
+                    result.name = postName || preName;
+                    result.isBracketed = isBracketed;
+                    return finishNode(result);
+                }
+                function parseReturnTag(atToken, tagName) {
+                    if (ts.forEach(tags, function (t) { return t.kind === 288 /* JSDocReturnTag */; })) {
+                        parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, ts.Diagnostics._0_tag_already_specified, tagName.text);
+                    }
+                    var result = createNode(288 /* JSDocReturnTag */, atToken.pos);
+                    result.atToken = atToken;
+                    result.tagName = tagName;
+                    result.typeExpression = tryParseTypeExpression();
+                    return finishNode(result);
+                }
+                function parseTypeTag(atToken, tagName) {
+                    if (ts.forEach(tags, function (t) { return t.kind === 289 /* JSDocTypeTag */; })) {
+                        parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, ts.Diagnostics._0_tag_already_specified, tagName.text);
+                    }
+                    var result = createNode(289 /* JSDocTypeTag */, atToken.pos);
+                    result.atToken = atToken;
+                    result.tagName = tagName;
+                    result.typeExpression = tryParseTypeExpression();
+                    return finishNode(result);
+                }
+                function parseAugmentsTag(atToken, tagName) {
+                    var typeExpression = tryParseTypeExpression();
+                    var result = createNode(285 /* JSDocAugmentsTag */, atToken.pos);
+                    result.atToken = atToken;
+                    result.tagName = tagName;
+                    result.typeExpression = typeExpression;
+                    return finishNode(result);
+                }
+                function parseClassTag(atToken, tagName) {
+                    var tag = createNode(286 /* JSDocClassTag */, atToken.pos);
+                    tag.atToken = atToken;
+                    tag.tagName = tagName;
+                    return finishNode(tag);
+                }
+                function parseTypedefTag(atToken, tagName) {
+                    var typeExpression = tryParseTypeExpression();
+                    skipWhitespace();
+                    var typedefTag = createNode(291 /* JSDocTypedefTag */, atToken.pos);
+                    typedefTag.atToken = atToken;
+                    typedefTag.tagName = tagName;
+                    typedefTag.fullName = parseJSDocTypeNameWithNamespace(/*flags*/ 0);
+                    if (typedefTag.fullName) {
+                        var rightNode = typedefTag.fullName;
+                        while (true) {
+                            if (rightNode.kind === 71 /* Identifier */ || !rightNode.body) {
+                                // if node is identifier - use it as name
+                                // otherwise use name of the rightmost part that we were able to parse
+                                typedefTag.name = rightNode.kind === 71 /* Identifier */ ? rightNode : rightNode.name;
+                                break;
+                            }
+                            rightNode = rightNode.body;
+                        }
+                    }
+                    typedefTag.typeExpression = typeExpression;
+                    skipWhitespace();
+                    if (typeExpression) {
+                        if (typeExpression.type.kind === 277 /* JSDocTypeReference */) {
+                            var jsDocTypeReference = typeExpression.type;
+                            if (jsDocTypeReference.name.kind === 71 /* Identifier */) {
+                                var name_8 = jsDocTypeReference.name;
+                                if (name_8.text === "Object" || name_8.text === "object") {
+                                    typedefTag.jsDocTypeLiteral = scanChildTags();
+                                }
+                            }
+                        }
+                        if (!typedefTag.jsDocTypeLiteral) {
+                            typedefTag.jsDocTypeLiteral = typeExpression.type;
+                        }
+                    }
+                    else {
+                        typedefTag.jsDocTypeLiteral = scanChildTags();
+                    }
+                    return finishNode(typedefTag);
+                    function scanChildTags() {
+                        var jsDocTypeLiteral = createNode(293 /* JSDocTypeLiteral */, scanner.getStartPos());
+                        var resumePos = scanner.getStartPos();
+                        var canParseTag = true;
+                        var seenAsterisk = false;
+                        var parentTagTerminated = false;
+                        while (token() !== 1 /* EndOfFileToken */ && !parentTagTerminated) {
+                            nextJSDocToken();
+                            switch (token()) {
+                                case 57 /* AtToken */:
+                                    if (canParseTag) {
+                                        parentTagTerminated = !tryParseChildTag(jsDocTypeLiteral);
+                                        if (!parentTagTerminated) {
+                                            resumePos = scanner.getStartPos();
+                                        }
+                                    }
+                                    seenAsterisk = false;
+                                    break;
+                                case 4 /* NewLineTrivia */:
+                                    resumePos = scanner.getStartPos() - 1;
+                                    canParseTag = true;
+                                    seenAsterisk = false;
+                                    break;
+                                case 39 /* AsteriskToken */:
+                                    if (seenAsterisk) {
+                                        canParseTag = false;
+                                    }
+                                    seenAsterisk = true;
+                                    break;
+                                case 71 /* Identifier */:
+                                    canParseTag = false;
+                                    break;
+                                case 1 /* EndOfFileToken */:
+                                    break;
+                            }
+                        }
+                        scanner.setTextPos(resumePos);
+                        return finishNode(jsDocTypeLiteral);
+                    }
+                    function parseJSDocTypeNameWithNamespace(flags) {
+                        var pos = scanner.getTokenPos();
+                        var typeNameOrNamespaceName = parseJSDocIdentifierName();
+                        if (typeNameOrNamespaceName && parseOptional(23 /* DotToken */)) {
+                            var jsDocNamespaceNode = createNode(233 /* ModuleDeclaration */, pos);
+                            jsDocNamespaceNode.flags |= flags;
+                            jsDocNamespaceNode.name = typeNameOrNamespaceName;
+                            jsDocNamespaceNode.body = parseJSDocTypeNameWithNamespace(4 /* NestedNamespace */);
+                            return finishNode(jsDocNamespaceNode);
+                        }
+                        if (typeNameOrNamespaceName && flags & 4 /* NestedNamespace */) {
+                            typeNameOrNamespaceName.isInJSDocNamespace = true;
+                        }
+                        return typeNameOrNamespaceName;
+                    }
+                }
+                function tryParseChildTag(parentTag) {
+                    ts.Debug.assert(token() === 57 /* AtToken */);
+                    var atToken = createNode(57 /* AtToken */, scanner.getStartPos());
+                    atToken.end = scanner.getTextPos();
+                    nextJSDocToken();
+                    var tagName = parseJSDocIdentifierName();
+                    skipWhitespace();
+                    if (!tagName) {
+                        return false;
+                    }
+                    switch (tagName.text) {
+                        case "type":
+                            if (parentTag.jsDocTypeTag) {
+                                // already has a @type tag, terminate the parent tag now.
+                                return false;
+                            }
+                            parentTag.jsDocTypeTag = parseTypeTag(atToken, tagName);
+                            return true;
+                        case "prop":
+                        case "property":
+                            var propertyTag = parseParameterOrPropertyTag(atToken, tagName, /*shouldParseParamTag*/ false);
+                            if (propertyTag) {
+                                if (!parentTag.jsDocPropertyTags) {
+                                    parentTag.jsDocPropertyTags = [];
+                                }
+                                parentTag.jsDocPropertyTags.push(propertyTag);
+                                return true;
+                            }
+                            // Error parsing property tag
+                            return false;
+                    }
+                    return false;
+                }
+                function parseTemplateTag(atToken, tagName) {
+                    if (ts.forEach(tags, function (t) { return t.kind === 290 /* JSDocTemplateTag */; })) {
+                        parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, ts.Diagnostics._0_tag_already_specified, tagName.text);
+                    }
+                    // Type parameter list looks like '@template T,U,V'
+                    var typeParameters = createNodeArray();
+                    while (true) {
+                        var name_9 = parseJSDocIdentifierName();
+                        skipWhitespace();
+                        if (!name_9) {
+                            parseErrorAtPosition(scanner.getStartPos(), 0, ts.Diagnostics.Identifier_expected);
+                            return undefined;
+                        }
+                        var typeParameter = createNode(145 /* TypeParameter */, name_9.pos);
+                        typeParameter.name = name_9;
+                        finishNode(typeParameter);
+                        typeParameters.push(typeParameter);
+                        if (token() === 26 /* CommaToken */) {
+                            nextJSDocToken();
+                            skipWhitespace();
+                        }
+                        else {
+                            break;
+                        }
+                    }
+                    var result = createNode(290 /* JSDocTemplateTag */, atToken.pos);
+                    result.atToken = atToken;
+                    result.tagName = tagName;
+                    result.typeParameters = typeParameters;
+                    finishNode(result);
+                    typeParameters.end = result.end;
+                    return result;
+                }
+                function nextJSDocToken() {
+                    return currentToken = scanner.scanJSDocToken();
+                }
+                function parseJSDocIdentifierName(createIfMissing) {
+                    if (createIfMissing === void 0) { createIfMissing = false; }
+                    return createJSDocIdentifier(ts.tokenIsIdentifierOrKeyword(token()), createIfMissing);
+                }
+                function createJSDocIdentifier(isIdentifier, createIfMissing) {
+                    if (!isIdentifier) {
+                        if (createIfMissing) {
+                            return createMissingNode(71 /* Identifier */, /*reportAtCurrentPosition*/ true, ts.Diagnostics.Identifier_expected);
+                        }
+                        else {
+                            parseErrorAtCurrentToken(ts.Diagnostics.Identifier_expected);
+                            return undefined;
+                        }
+                    }
+                    var pos = scanner.getTokenPos();
+                    var end = scanner.getTextPos();
+                    var result = createNode(71 /* Identifier */, pos);
+                    result.text = content.substring(pos, end);
+                    finishNode(result, end);
+                    nextJSDocToken();
+                    return result;
+                }
+            }
+            JSDocParser.parseJSDocCommentWorker = parseJSDocCommentWorker;
+        })(JSDocParser = Parser.JSDocParser || (Parser.JSDocParser = {}));
+    })(Parser || (Parser = {}));
+    var IncrementalParser;
+    (function (IncrementalParser) {
+        function updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks) {
+            aggressiveChecks = aggressiveChecks || ts.Debug.shouldAssert(2 /* Aggressive */);
+            checkChangeRange(sourceFile, newText, textChangeRange, aggressiveChecks);
+            if (ts.textChangeRangeIsUnchanged(textChangeRange)) {
+                // if the text didn't change, then we can just return our current source file as-is.
+                return sourceFile;
+            }
+            if (sourceFile.statements.length === 0) {
+                // If we don't have any statements in the current source file, then there's no real
+                // way to incrementally parse.  So just do a full parse instead.
+                return Parser.parseSourceFile(sourceFile.fileName, newText, sourceFile.languageVersion, /*syntaxCursor*/ undefined, /*setParentNodes*/ true, sourceFile.scriptKind);
             }
-        }
-        Parser.fixupParentReferences = fixupParentReferences;
-        function createSourceFile(fileName, languageVersion, scriptKind) {
-            // code from createNode is inlined here so createNode won't have to deal with special case of creating source files
-            // this is quite rare comparing to other nodes and createNode should be as fast as possible
-            var sourceFile = new SourceFileConstructor(256 /* SourceFile */, /*pos*/ 0, /* end */ sourceText.length);
-            nodeCount++;
-            sourceFile.text = sourceText;
-            sourceFile.bindDiagnostics = [];
-            sourceFile.languageVersion = languageVersion;
-            sourceFile.fileName = ts.normalizePath(fileName);
-            sourceFile.languageVariant = getLanguageVariant(scriptKind);
-            sourceFile.isDeclarationFile = ts.fileExtensionIs(sourceFile.fileName, ".d.ts");
-            sourceFile.scriptKind = scriptKind;
-            return sourceFile;
-        }
-        function setContextFlag(val, flag) {
-            if (val) {
-                contextFlags |= flag;
-            }
-            else {
-                contextFlags &= ~flag;
-            }
-        }
-        function setDisallowInContext(val) {
-            setContextFlag(val, 32768 /* DisallowInContext */);
-        }
-        function setYieldContext(val) {
-            setContextFlag(val, 65536 /* YieldContext */);
-        }
-        function setDecoratorContext(val) {
-            setContextFlag(val, 131072 /* DecoratorContext */);
-        }
-        function setAwaitContext(val) {
-            setContextFlag(val, 262144 /* AwaitContext */);
-        }
-        function doOutsideOfContext(context, func) {
-            // contextFlagsToClear will contain only the context flags that are
-            // currently set that we need to temporarily clear
-            // We don't just blindly reset to the previous flags to ensure
-            // that we do not mutate cached flags for the incremental
-            // parser (ThisNodeHasError, ThisNodeOrAnySubNodesHasError, and
-            // HasAggregatedChildData).
-            var contextFlagsToClear = context & contextFlags;
-            if (contextFlagsToClear) {
-                // clear the requested context flags
-                setContextFlag(/*val*/ false, contextFlagsToClear);
-                var result = func();
-                // restore the context flags we just cleared
-                setContextFlag(/*val*/ true, contextFlagsToClear);
-                return result;
-            }
-            // no need to do anything special as we are not in any of the requested contexts
-            return func();
-        }
-        function doInsideOfContext(context, func) {
-            // contextFlagsToSet will contain only the context flags that
-            // are not currently set that we need to temporarily enable.
-            // We don't just blindly reset to the previous flags to ensure
-            // that we do not mutate cached flags for the incremental
-            // parser (ThisNodeHasError, ThisNodeOrAnySubNodesHasError, and
-            // HasAggregatedChildData).
-            var contextFlagsToSet = context & ~contextFlags;
-            if (contextFlagsToSet) {
-                // set the requested context flags
-                setContextFlag(/*val*/ true, contextFlagsToSet);
-                var result = func();
-                // reset the context flags we just set
-                setContextFlag(/*val*/ false, contextFlagsToSet);
-                return result;
-            }
-            // no need to do anything special as we are already in all of the requested contexts
-            return func();
-        }
-        function allowInAnd(func) {
-            return doOutsideOfContext(32768 /* DisallowInContext */, func);
-        }
-        function disallowInAnd(func) {
-            return doInsideOfContext(32768 /* DisallowInContext */, func);
-        }
-        function doInYieldContext(func) {
-            return doInsideOfContext(65536 /* YieldContext */, func);
-        }
-        function doInDecoratorContext(func) {
-            return doInsideOfContext(131072 /* DecoratorContext */, func);
-        }
-        function doInAwaitContext(func) {
-            return doInsideOfContext(262144 /* AwaitContext */, func);
-        }
-        function doOutsideOfAwaitContext(func) {
-            return doOutsideOfContext(262144 /* AwaitContext */, func);
-        }
-        function doInYieldAndAwaitContext(func) {
-            return doInsideOfContext(65536 /* YieldContext */ | 262144 /* AwaitContext */, func);
-        }
-        function inContext(flags) {
-            return (contextFlags & flags) !== 0;
-        }
-        function inYieldContext() {
-            return inContext(65536 /* YieldContext */);
-        }
-        function inDisallowInContext() {
-            return inContext(32768 /* DisallowInContext */);
-        }
-        function inDecoratorContext() {
-            return inContext(131072 /* DecoratorContext */);
-        }
-        function inAwaitContext() {
-            return inContext(262144 /* AwaitContext */);
-        }
-        function parseErrorAtCurrentToken(message, arg0) {
-            var start = scanner.getTokenPos();
-            var length = scanner.getTextPos() - start;
-            parseErrorAtPosition(start, length, message, arg0);
-        }
-        function parseErrorAtPosition(start, length, message, arg0) {
-            // Don't report another error if it would just be at the same position as the last error.
-            var lastError = ts.lastOrUndefined(parseDiagnostics);
-            if (!lastError || start !== lastError.start) {
-                parseDiagnostics.push(ts.createFileDiagnostic(sourceFile, start, length, message, arg0));
-            }
-            // Mark that we've encountered an error.  We'll set an appropriate bit on the next
-            // node we finish so that it can't be reused incrementally.
-            parseErrorBeforeNextFinishedNode = true;
-        }
-        function scanError(message, length) {
-            var pos = scanner.getTextPos();
-            parseErrorAtPosition(pos, length || 0, message);
-        }
-        function getNodePos() {
-            return scanner.getStartPos();
-        }
-        function getNodeEnd() {
-            return scanner.getStartPos();
-        }
-        // Use this function to access the current token instead of reading the currentToken
-        // variable. Since function results aren't narrowed in control flow analysis, this ensures
-        // that the type checker doesn't make wrong assumptions about the type of the current
-        // token (e.g. a call to nextToken() changes the current token but the checker doesn't
-        // reason about this side effect).  Mainstream VMs inline simple functions like this, so
-        // there is no performance penalty.
-        function token() {
-            return currentToken;
-        }
-        function nextToken() {
-            return currentToken = scanner.scan();
-        }
-        function reScanGreaterToken() {
-            return currentToken = scanner.reScanGreaterToken();
-        }
-        function reScanSlashToken() {
-            return currentToken = scanner.reScanSlashToken();
-        }
-        function reScanTemplateToken() {
-            return currentToken = scanner.reScanTemplateToken();
-        }
-        function scanJsxIdentifier() {
-            return currentToken = scanner.scanJsxIdentifier();
-        }
-        function scanJsxText() {
-            return currentToken = scanner.scanJsxToken();
-        }
-        function scanJsxAttributeValue() {
-            return currentToken = scanner.scanJsxAttributeValue();
-        }
-        function speculationHelper(callback, isLookAhead) {
-            // Keep track of the state we'll need to rollback to if lookahead fails (or if the
-            // caller asked us to always reset our state).
-            var saveToken = currentToken;
-            var saveParseDiagnosticsLength = parseDiagnostics.length;
-            var saveParseErrorBeforeNextFinishedNode = parseErrorBeforeNextFinishedNode;
-            // Note: it is not actually necessary to save/restore the context flags here.  That's
-            // because the saving/restoring of these flags happens naturally through the recursive
-            // descent nature of our parser.  However, we still store this here just so we can
-            // assert that invariant holds.
-            var saveContextFlags = contextFlags;
-            // If we're only looking ahead, then tell the scanner to only lookahead as well.
-            // Otherwise, if we're actually speculatively parsing, then tell the scanner to do the
-            // same.
-            var result = isLookAhead
-                ? scanner.lookAhead(callback)
-                : scanner.tryScan(callback);
-            ts.Debug.assert(saveContextFlags === contextFlags);
-            // If our callback returned something 'falsy' or we're just looking ahead,
-            // then unconditionally restore us to where we were.
-            if (!result || isLookAhead) {
-                currentToken = saveToken;
-                parseDiagnostics.length = saveParseDiagnosticsLength;
-                parseErrorBeforeNextFinishedNode = saveParseErrorBeforeNextFinishedNode;
-            }
+            // Make sure we're not trying to incrementally update a source file more than once.  Once
+            // we do an update the original source file is considered unusable from that point onwards.
+            //
+            // This is because we do incremental parsing in-place.  i.e. we take nodes from the old
+            // tree and give them new positions and parents.  From that point on, trusting the old
+            // tree at all is not possible as far too much of it may violate invariants.
+            var incrementalSourceFile = sourceFile;
+            ts.Debug.assert(!incrementalSourceFile.hasBeenIncrementallyParsed);
+            incrementalSourceFile.hasBeenIncrementallyParsed = true;
+            var oldText = sourceFile.text;
+            var syntaxCursor = createSyntaxCursor(sourceFile);
+            // Make the actual change larger so that we know to reparse anything whose lookahead
+            // might have intersected the change.
+            var changeRange = extendToAffectedRange(sourceFile, textChangeRange);
+            checkChangeRange(sourceFile, newText, changeRange, aggressiveChecks);
+            // Ensure that extending the affected range only moved the start of the change range
+            // earlier in the file.
+            ts.Debug.assert(changeRange.span.start <= textChangeRange.span.start);
+            ts.Debug.assert(ts.textSpanEnd(changeRange.span) === ts.textSpanEnd(textChangeRange.span));
+            ts.Debug.assert(ts.textSpanEnd(ts.textChangeRangeNewSpan(changeRange)) === ts.textSpanEnd(ts.textChangeRangeNewSpan(textChangeRange)));
+            // The is the amount the nodes after the edit range need to be adjusted.  It can be
+            // positive (if the edit added characters), negative (if the edit deleted characters)
+            // or zero (if this was a pure overwrite with nothing added/removed).
+            var delta = ts.textChangeRangeNewSpan(changeRange).length - changeRange.span.length;
+            // If we added or removed characters during the edit, then we need to go and adjust all
+            // the nodes after the edit.  Those nodes may move forward (if we inserted chars) or they
+            // may move backward (if we deleted chars).
+            //
+            // Doing this helps us out in two ways.  First, it means that any nodes/tokens we want
+            // to reuse are already at the appropriate position in the new text.  That way when we
+            // reuse them, we don't have to figure out if they need to be adjusted.  Second, it makes
+            // it very easy to determine if we can reuse a node.  If the node's position is at where
+            // we are in the text, then we can reuse it.  Otherwise we can't.  If the node's position
+            // is ahead of us, then we'll need to rescan tokens.  If the node's position is behind
+            // us, then we'll need to skip it or crumble it as appropriate
+            //
+            // We will also adjust the positions of nodes that intersect the change range as well.
+            // By doing this, we ensure that all the positions in the old tree are consistent, not
+            // just the positions of nodes entirely before/after the change range.  By being
+            // consistent, we can then easily map from positions to nodes in the old tree easily.
+            //
+            // Also, mark any syntax elements that intersect the changed span.  We know, up front,
+            // that we cannot reuse these elements.
+            updateTokenPositionsAndMarkElements(incrementalSourceFile, changeRange.span.start, ts.textSpanEnd(changeRange.span), ts.textSpanEnd(ts.textChangeRangeNewSpan(changeRange)), delta, oldText, newText, aggressiveChecks);
+            // Now that we've set up our internal incremental state just proceed and parse the
+            // source file in the normal fashion.  When possible the parser will retrieve and
+            // reuse nodes from the old tree.
+            //
+            // Note: passing in 'true' for setNodeParents is very important.  When incrementally
+            // parsing, we will be reusing nodes from the old tree, and placing it into new
+            // parents.  If we don't set the parents now, we'll end up with an observably
+            // inconsistent tree.  Setting the parents on the new tree should be very fast.  We
+            // will immediately bail out of walking any subtrees when we can see that their parents
+            // are already correct.
+            var result = Parser.parseSourceFile(sourceFile.fileName, newText, sourceFile.languageVersion, syntaxCursor, /*setParentNodes*/ true, sourceFile.scriptKind);
             return result;
         }
-        /** Invokes the provided callback then unconditionally restores the parser to the state it
-         * was in immediately prior to invoking the callback.  The result of invoking the callback
-         * is returned from this function.
-         */
-        function lookAhead(callback) {
-            return speculationHelper(callback, /*isLookAhead*/ true);
-        }
-        /** Invokes the provided callback.  If the callback returns something falsy, then it restores
-         * the parser to the state it was in immediately prior to invoking the callback.  If the
-         * callback returns something truthy, then the parser state is not rolled back.  The result
-         * of invoking the callback is returned from this function.
-         */
-        function tryParse(callback) {
-            return speculationHelper(callback, /*isLookAhead*/ false);
-        }
-        // Ignore strict mode flag because we will report an error in type checker instead.
-        function isIdentifier() {
-            if (token() === 69 /* Identifier */) {
-                return true;
+        IncrementalParser.updateSourceFile = updateSourceFile;
+        function moveElementEntirelyPastChangeRange(element, isArray, delta, oldText, newText, aggressiveChecks) {
+            if (isArray) {
+                visitArray(element);
             }
-            // If we have a 'yield' keyword, and we're in the [yield] context, then 'yield' is
-            // considered a keyword and is not an identifier.
-            if (token() === 114 /* YieldKeyword */ && inYieldContext()) {
-                return false;
+            else {
+                visitNode(element);
             }
-            // If we have a 'await' keyword, and we're in the [Await] context, then 'await' is
-            // considered a keyword and is not an identifier.
-            if (token() === 119 /* AwaitKeyword */ && inAwaitContext()) {
-                return false;
+            return;
+            function visitNode(node) {
+                var text = "";
+                if (aggressiveChecks && shouldCheckNode(node)) {
+                    text = oldText.substring(node.pos, node.end);
+                }
+                // Ditch any existing LS children we may have created.  This way we can avoid
+                // moving them forward.
+                if (node._children) {
+                    node._children = undefined;
+                }
+                node.pos += delta;
+                node.end += delta;
+                if (aggressiveChecks && shouldCheckNode(node)) {
+                    ts.Debug.assert(text === newText.substring(node.pos, node.end));
+                }
+                forEachChild(node, visitNode, visitArray);
+                if (node.jsDoc) {
+                    for (var _i = 0, _a = node.jsDoc; _i < _a.length; _i++) {
+                        var jsDocComment = _a[_i];
+                        forEachChild(jsDocComment, visitNode, visitArray);
+                    }
+                }
+                checkNodePositions(node, aggressiveChecks);
             }
-            return token() > 105 /* LastReservedWord */;
-        }
-        function parseExpected(kind, diagnosticMessage, shouldAdvance) {
-            if (shouldAdvance === void 0) { shouldAdvance = true; }
-            if (token() === kind) {
-                if (shouldAdvance) {
-                    nextToken();
+            function visitArray(array) {
+                array._children = undefined;
+                array.pos += delta;
+                array.end += delta;
+                for (var _i = 0, array_9 = array; _i < array_9.length; _i++) {
+                    var node = array_9[_i];
+                    visitNode(node);
                 }
-                return true;
             }
-            // Report specific message if provided with one.  Otherwise, report generic fallback message.
-            if (diagnosticMessage) {
-                parseErrorAtCurrentToken(diagnosticMessage);
+        }
+        function shouldCheckNode(node) {
+            switch (node.kind) {
+                case 9 /* StringLiteral */:
+                case 8 /* NumericLiteral */:
+                case 71 /* Identifier */:
+                    return true;
+            }
+            return false;
+        }
+        function adjustIntersectingElement(element, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta) {
+            ts.Debug.assert(element.end >= changeStart, "Adjusting an element that was entirely before the change range");
+            ts.Debug.assert(element.pos <= changeRangeOldEnd, "Adjusting an element that was entirely after the change range");
+            ts.Debug.assert(element.pos <= element.end);
+            // We have an element that intersects the change range in some way.  It may have its
+            // start, or its end (or both) in the changed range.  We want to adjust any part
+            // that intersects such that the final tree is in a consistent state.  i.e. all
+            // children have spans within the span of their parent, and all siblings are ordered
+            // properly.
+            // We may need to update both the 'pos' and the 'end' of the element.
+            // If the 'pos' is before the start of the change, then we don't need to touch it.
+            // If it isn't, then the 'pos' must be inside the change.  How we update it will
+            // depend if delta is  positive or negative.  If delta is positive then we have
+            // something like:
+            //
+            //  -------------------AAA-----------------
+            //  -------------------BBBCCCCCCC-----------------
+            //
+            // In this case, we consider any node that started in the change range to still be
+            // starting at the same position.
+            //
+            // however, if the delta is negative, then we instead have something like this:
+            //
+            //  -------------------XXXYYYYYYY-----------------
+            //  -------------------ZZZ-----------------
+            //
+            // In this case, any element that started in the 'X' range will keep its position.
+            // However any element that started after that will have their pos adjusted to be
+            // at the end of the new range.  i.e. any node that started in the 'Y' range will
+            // be adjusted to have their start at the end of the 'Z' range.
+            //
+            // The element will keep its position if possible.  Or Move backward to the new-end
+            // if it's in the 'Y' range.
+            element.pos = Math.min(element.pos, changeRangeNewEnd);
+            // If the 'end' is after the change range, then we always adjust it by the delta
+            // amount.  However, if the end is in the change range, then how we adjust it
+            // will depend on if delta is  positive or negative.  If delta is positive then we
+            // have something like:
+            //
+            //  -------------------AAA-----------------
+            //  -------------------BBBCCCCCCC-----------------
+            //
+            // In this case, we consider any node that ended inside the change range to keep its
+            // end position.
+            //
+            // however, if the delta is negative, then we instead have something like this:
+            //
+            //  -------------------XXXYYYYYYY-----------------
+            //  -------------------ZZZ-----------------
+            //
+            // In this case, any element that ended in the 'X' range will keep its position.
+            // However any element that ended after that will have their pos adjusted to be
+            // at the end of the new range.  i.e. any node that ended in the 'Y' range will
+            // be adjusted to have their end at the end of the 'Z' range.
+            if (element.end >= changeRangeOldEnd) {
+                // Element ends after the change range.  Always adjust the end pos.
+                element.end += delta;
             }
             else {
-                parseErrorAtCurrentToken(ts.Diagnostics._0_expected, ts.tokenToString(kind));
+                // Element ends in the change range.  The element will keep its position if
+                // possible. Or Move backward to the new-end if it's in the 'Y' range.
+                element.end = Math.min(element.end, changeRangeNewEnd);
+            }
+            ts.Debug.assert(element.pos <= element.end);
+            if (element.parent) {
+                ts.Debug.assert(element.pos >= element.parent.pos);
+                ts.Debug.assert(element.end <= element.parent.end);
             }
-            return false;
         }
-        function parseOptional(t) {
-            if (token() === t) {
-                nextToken();
-                return true;
+        function checkNodePositions(node, aggressiveChecks) {
+            if (aggressiveChecks) {
+                var pos_2 = node.pos;
+                forEachChild(node, function (child) {
+                    ts.Debug.assert(child.pos >= pos_2);
+                    pos_2 = child.end;
+                });
+                ts.Debug.assert(pos_2 <= node.end);
             }
-            return false;
         }
-        function parseOptionalToken(t) {
-            if (token() === t) {
-                return parseTokenNode();
+        function updateTokenPositionsAndMarkElements(sourceFile, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta, oldText, newText, aggressiveChecks) {
+            visitNode(sourceFile);
+            return;
+            function visitNode(child) {
+                ts.Debug.assert(child.pos <= child.end);
+                if (child.pos > changeRangeOldEnd) {
+                    // Node is entirely past the change range.  We need to move both its pos and
+                    // end, forward or backward appropriately.
+                    moveElementEntirelyPastChangeRange(child, /*isArray*/ false, delta, oldText, newText, aggressiveChecks);
+                    return;
+                }
+                // Check if the element intersects the change range.  If it does, then it is not
+                // reusable.  Also, we'll need to recurse to see what constituent portions we may
+                // be able to use.
+                var fullEnd = child.end;
+                if (fullEnd >= changeStart) {
+                    child.intersectsChange = true;
+                    child._children = undefined;
+                    // Adjust the pos or end (or both) of the intersecting element accordingly.
+                    adjustIntersectingElement(child, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta);
+                    forEachChild(child, visitNode, visitArray);
+                    checkNodePositions(child, aggressiveChecks);
+                    return;
+                }
+                // Otherwise, the node is entirely before the change range.  No need to do anything with it.
+                ts.Debug.assert(fullEnd < changeStart);
+            }
+            function visitArray(array) {
+                ts.Debug.assert(array.pos <= array.end);
+                if (array.pos > changeRangeOldEnd) {
+                    // Array is entirely after the change range.  We need to move it, and move any of
+                    // its children.
+                    moveElementEntirelyPastChangeRange(array, /*isArray*/ true, delta, oldText, newText, aggressiveChecks);
+                    return;
+                }
+                // Check if the element intersects the change range.  If it does, then it is not
+                // reusable.  Also, we'll need to recurse to see what constituent portions we may
+                // be able to use.
+                var fullEnd = array.end;
+                if (fullEnd >= changeStart) {
+                    array.intersectsChange = true;
+                    array._children = undefined;
+                    // Adjust the pos or end (or both) of the intersecting array accordingly.
+                    adjustIntersectingElement(array, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta);
+                    for (var _i = 0, array_10 = array; _i < array_10.length; _i++) {
+                        var node = array_10[_i];
+                        visitNode(node);
+                    }
+                    return;
+                }
+                // Otherwise, the array is entirely before the change range.  No need to do anything with it.
+                ts.Debug.assert(fullEnd < changeStart);
             }
-            return undefined;
         }
-        function parseExpectedToken(t, reportAtCurrentPosition, diagnosticMessage, arg0) {
-            return parseOptionalToken(t) ||
-                createMissingNode(t, reportAtCurrentPosition, diagnosticMessage, arg0);
+        function extendToAffectedRange(sourceFile, changeRange) {
+            // Consider the following code:
+            //      void foo() { /; }
+            //
+            // If the text changes with an insertion of / just before the semicolon then we end up with:
+            //      void foo() { //; }
+            //
+            // If we were to just use the changeRange a is, then we would not rescan the { token
+            // (as it does not intersect the actual original change range).  Because an edit may
+            // change the token touching it, we actually need to look back *at least* one token so
+            // that the prior token sees that change.
+            var maxLookahead = 1;
+            var start = changeRange.span.start;
+            // the first iteration aligns us with the change start. subsequent iteration move us to
+            // the left by maxLookahead tokens.  We only need to do this as long as we're not at the
+            // start of the tree.
+            for (var i = 0; start > 0 && i <= maxLookahead; i++) {
+                var nearestNode = findNearestNodeStartingBeforeOrAtPosition(sourceFile, start);
+                ts.Debug.assert(nearestNode.pos <= start);
+                var position = nearestNode.pos;
+                start = Math.max(0, position - 1);
+            }
+            var finalSpan = ts.createTextSpanFromBounds(start, ts.textSpanEnd(changeRange.span));
+            var finalLength = changeRange.newLength + (changeRange.span.start - start);
+            return ts.createTextChangeRange(finalSpan, finalLength);
         }
-        function parseTokenNode() {
-            var node = createNode(token());
-            nextToken();
-            return finishNode(node);
+        function findNearestNodeStartingBeforeOrAtPosition(sourceFile, position) {
+            var bestResult = sourceFile;
+            var lastNodeEntirelyBeforePosition;
+            forEachChild(sourceFile, visit);
+            if (lastNodeEntirelyBeforePosition) {
+                var lastChildOfLastEntireNodeBeforePosition = getLastChild(lastNodeEntirelyBeforePosition);
+                if (lastChildOfLastEntireNodeBeforePosition.pos > bestResult.pos) {
+                    bestResult = lastChildOfLastEntireNodeBeforePosition;
+                }
+            }
+            return bestResult;
+            function getLastChild(node) {
+                while (true) {
+                    var lastChild = getLastChildWorker(node);
+                    if (lastChild) {
+                        node = lastChild;
+                    }
+                    else {
+                        return node;
+                    }
+                }
+            }
+            function getLastChildWorker(node) {
+                var last = undefined;
+                forEachChild(node, function (child) {
+                    if (ts.nodeIsPresent(child)) {
+                        last = child;
+                    }
+                });
+                return last;
+            }
+            function visit(child) {
+                if (ts.nodeIsMissing(child)) {
+                    // Missing nodes are effectively invisible to us.  We never even consider them
+                    // When trying to find the nearest node before us.
+                    return;
+                }
+                // If the child intersects this position, then this node is currently the nearest
+                // node that starts before the position.
+                if (child.pos <= position) {
+                    if (child.pos >= bestResult.pos) {
+                        // This node starts before the position, and is closer to the position than
+                        // the previous best node we found.  It is now the new best node.
+                        bestResult = child;
+                    }
+                    // Now, the node may overlap the position, or it may end entirely before the
+                    // position.  If it overlaps with the position, then either it, or one of its
+                    // children must be the nearest node before the position.  So we can just
+                    // recurse into this child to see if we can find something better.
+                    if (position < child.end) {
+                        // The nearest node is either this child, or one of the children inside
+                        // of it.  We've already marked this child as the best so far.  Recurse
+                        // in case one of the children is better.
+                        forEachChild(child, visit);
+                        // Once we look at the children of this node, then there's no need to
+                        // continue any further.
+                        return true;
+                    }
+                    else {
+                        ts.Debug.assert(child.end <= position);
+                        // The child ends entirely before this position.  Say you have the following
+                        // (where $ is the position)
+                        //
+                        //      <complex expr 1> ? <complex expr 2> $ : <...> <...>
+                        //
+                        // We would want to find the nearest preceding node in "complex expr 2".
+                        // To support that, we keep track of this node, and once we're done searching
+                        // for a best node, we recurse down this node to see if we can find a good
+                        // result in it.
+                        //
+                        // This approach allows us to quickly skip over nodes that are entirely
+                        // before the position, while still allowing us to find any nodes in the
+                        // last one that might be what we want.
+                        lastNodeEntirelyBeforePosition = child;
+                    }
+                }
+                else {
+                    ts.Debug.assert(child.pos > position);
+                    // We're now at a node that is entirely past the position we're searching for.
+                    // This node (and all following nodes) could never contribute to the result,
+                    // so just skip them by returning 'true' here.
+                    return true;
+                }
+            }
         }
-        function canParseSemicolon() {
-            // If there's a real semicolon, then we can always parse it out.
-            if (token() === 23 /* SemicolonToken */) {
-                return true;
+        function checkChangeRange(sourceFile, newText, textChangeRange, aggressiveChecks) {
+            var oldText = sourceFile.text;
+            if (textChangeRange) {
+                ts.Debug.assert((oldText.length - textChangeRange.span.length + textChangeRange.newLength) === newText.length);
+                if (aggressiveChecks || ts.Debug.shouldAssert(3 /* VeryAggressive */)) {
+                    var oldTextPrefix = oldText.substr(0, textChangeRange.span.start);
+                    var newTextPrefix = newText.substr(0, textChangeRange.span.start);
+                    ts.Debug.assert(oldTextPrefix === newTextPrefix);
+                    var oldTextSuffix = oldText.substring(ts.textSpanEnd(textChangeRange.span), oldText.length);
+                    var newTextSuffix = newText.substring(ts.textSpanEnd(ts.textChangeRangeNewSpan(textChangeRange)), newText.length);
+                    ts.Debug.assert(oldTextSuffix === newTextSuffix);
+                }
             }
-            // We can parse out an optional semicolon in ASI cases in the following cases.
-            return token() === 16 /* CloseBraceToken */ || token() === 1 /* EndOfFileToken */ || scanner.hasPrecedingLineBreak();
         }
-        function parseSemicolon() {
-            if (canParseSemicolon()) {
-                if (token() === 23 /* SemicolonToken */) {
-                    // consume the semicolon if it was explicitly provided.
-                    nextToken();
+        function createSyntaxCursor(sourceFile) {
+            var currentArray = sourceFile.statements;
+            var currentArrayIndex = 0;
+            ts.Debug.assert(currentArrayIndex < currentArray.length);
+            var current = currentArray[currentArrayIndex];
+            var lastQueriedPosition = -1 /* Value */;
+            return {
+                currentNode: function (position) {
+                    // Only compute the current node if the position is different than the last time
+                    // we were asked.  The parser commonly asks for the node at the same position
+                    // twice.  Once to know if can read an appropriate list element at a certain point,
+                    // and then to actually read and consume the node.
+                    if (position !== lastQueriedPosition) {
+                        // Much of the time the parser will need the very next node in the array that
+                        // we just returned a node from.So just simply check for that case and move
+                        // forward in the array instead of searching for the node again.
+                        if (current && current.end === position && currentArrayIndex < (currentArray.length - 1)) {
+                            currentArrayIndex++;
+                            current = currentArray[currentArrayIndex];
+                        }
+                        // If we don't have a node, or the node we have isn't in the right position,
+                        // then try to find a viable node at the position requested.
+                        if (!current || current.pos !== position) {
+                            findHighestListElementThatStartsAtPosition(position);
+                        }
+                    }
+                    // Cache this query so that we don't do any extra work if the parser calls back
+                    // into us.  Note: this is very common as the parser will make pairs of calls like
+                    // 'isListElement -> parseListElement'.  If we were unable to find a node when
+                    // called with 'isListElement', we don't want to redo the work when parseListElement
+                    // is called immediately after.
+                    lastQueriedPosition = position;
+                    // Either we don'd have a node, or we have a node at the position being asked for.
+                    ts.Debug.assert(!current || current.pos === position);
+                    return current;
+                }
+            };
+            // Finds the highest element in the tree we can find that starts at the provided position.
+            // The element must be a direct child of some node list in the tree.  This way after we
+            // return it, we can easily return its next sibling in the list.
+            function findHighestListElementThatStartsAtPosition(position) {
+                // Clear out any cached state about the last node we found.
+                currentArray = undefined;
+                currentArrayIndex = -1 /* Value */;
+                current = undefined;
+                // Recurse into the source file to find the highest node at this position.
+                forEachChild(sourceFile, visitNode, visitArray);
+                return;
+                function visitNode(node) {
+                    if (position >= node.pos && position < node.end) {
+                        // Position was within this node.  Keep searching deeper to find the node.
+                        forEachChild(node, visitNode, visitArray);
+                        // don't proceed any further in the search.
+                        return true;
+                    }
+                    // position wasn't in this node, have to keep searching.
+                    return false;
+                }
+                function visitArray(array) {
+                    if (position >= array.pos && position < array.end) {
+                        // position was in this array.  Search through this array to see if we find a
+                        // viable element.
+                        for (var i = 0; i < array.length; i++) {
+                            var child = array[i];
+                            if (child) {
+                                if (child.pos === position) {
+                                    // Found the right node.  We're done.
+                                    currentArray = array;
+                                    currentArrayIndex = i;
+                                    current = child;
+                                    return true;
+                                }
+                                else {
+                                    if (child.pos < position && position < child.end) {
+                                        // Position in somewhere within this child.  Search in it and
+                                        // stop searching in this array.
+                                        forEachChild(child, visitNode, visitArray);
+                                        return true;
+                                    }
+                                }
+                            }
+                        }
+                    }
+                    // position wasn't in this array, have to keep searching.
+                    return false;
                 }
-                return true;
-            }
-            else {
-                return parseExpected(23 /* SemicolonToken */);
-            }
-        }
-        // note: this function creates only node
-        function createNode(kind, pos) {
-            nodeCount++;
-            if (!(pos >= 0)) {
-                pos = scanner.getStartPos();
-            }
-            return kind >= 139 /* FirstNode */ ? new NodeConstructor(kind, pos, pos) :
-                kind === 69 /* Identifier */ ? new IdentifierConstructor(kind, pos, pos) :
-                    new TokenConstructor(kind, pos, pos);
-        }
-        function createNodeArray(elements, pos) {
-            var array = (elements || []);
-            if (!(pos >= 0)) {
-                pos = getNodePos();
             }
-            array.pos = pos;
-            array.end = pos;
-            return array;
         }
-        function finishNode(node, end) {
-            node.end = end === undefined ? scanner.getStartPos() : end;
-            if (contextFlags) {
-                node.flags |= contextFlags;
-            }
-            // Keep track on the node if we encountered an error while parsing it.  If we did, then
-            // we cannot reuse the node incrementally.  Once we've marked this node, clear out the
-            // flag so that we don't mark any subsequent nodes.
-            if (parseErrorBeforeNextFinishedNode) {
-                parseErrorBeforeNextFinishedNode = false;
-                node.flags |= 524288 /* ThisNodeHasError */;
-            }
-            return node;
+        var InvalidPosition;
+        (function (InvalidPosition) {
+            InvalidPosition[InvalidPosition["Value"] = -1] = "Value";
+        })(InvalidPosition || (InvalidPosition = {}));
+    })(IncrementalParser || (IncrementalParser = {}));
+})(ts || (ts = {}));
+/// <reference path="utilities.ts"/>
+/// <reference path="parser.ts"/>
+/* @internal */
+var ts;
+(function (ts) {
+    var ModuleInstanceState;
+    (function (ModuleInstanceState) {
+        ModuleInstanceState[ModuleInstanceState["NonInstantiated"] = 0] = "NonInstantiated";
+        ModuleInstanceState[ModuleInstanceState["Instantiated"] = 1] = "Instantiated";
+        ModuleInstanceState[ModuleInstanceState["ConstEnumOnly"] = 2] = "ConstEnumOnly";
+    })(ModuleInstanceState = ts.ModuleInstanceState || (ts.ModuleInstanceState = {}));
+    function getModuleInstanceState(node) {
+        // A module is uninstantiated if it contains only
+        // 1. interface declarations, type alias declarations
+        if (node.kind === 230 /* InterfaceDeclaration */ || node.kind === 231 /* TypeAliasDeclaration */) {
+            return 0 /* NonInstantiated */;
         }
-        function createMissingNode(kind, reportAtCurrentPosition, diagnosticMessage, arg0) {
-            if (reportAtCurrentPosition) {
-                parseErrorAtPosition(scanner.getStartPos(), 0, diagnosticMessage, arg0);
-            }
-            else {
-                parseErrorAtCurrentToken(diagnosticMessage, arg0);
-            }
-            var result = createNode(kind, scanner.getStartPos());
-            result.text = "";
-            return finishNode(result);
+        else if (ts.isConstEnumDeclaration(node)) {
+            return 2 /* ConstEnumOnly */;
         }
-        function internIdentifier(text) {
-            text = ts.escapeIdentifier(text);
-            return identifiers[text] || (identifiers[text] = text);
+        else if ((node.kind === 238 /* ImportDeclaration */ || node.kind === 237 /* ImportEqualsDeclaration */) && !(ts.hasModifier(node, 1 /* Export */))) {
+            return 0 /* NonInstantiated */;
         }
-        // An identifier that starts with two underscores has an extra underscore character prepended to it to avoid issues
-        // with magic property names like '__proto__'. The 'identifiers' object is used to share a single string instance for
-        // each identifier in order to reduce memory consumption.
-        function createIdentifier(isIdentifier, diagnosticMessage) {
-            identifierCount++;
-            if (isIdentifier) {
-                var node = createNode(69 /* Identifier */);
-                // Store original token kind if it is not just an Identifier so we can report appropriate error later in type checker
-                if (token() !== 69 /* Identifier */) {
-                    node.originalKeywordKind = token();
+        else if (node.kind === 234 /* ModuleBlock */) {
+            var state_1 = 0 /* NonInstantiated */;
+            ts.forEachChild(node, function (n) {
+                switch (getModuleInstanceState(n)) {
+                    case 0 /* NonInstantiated */:
+                        // child is non-instantiated - continue searching
+                        return false;
+                    case 2 /* ConstEnumOnly */:
+                        // child is const enum only - record state and continue searching
+                        state_1 = 2 /* ConstEnumOnly */;
+                        return false;
+                    case 1 /* Instantiated */:
+                        // child is instantiated - record state and stop
+                        state_1 = 1 /* Instantiated */;
+                        return true;
                 }
-                node.text = internIdentifier(scanner.getTokenValue());
-                nextToken();
-                return finishNode(node);
-            }
-            return createMissingNode(69 /* Identifier */, /*reportAtCurrentPosition*/ false, diagnosticMessage || ts.Diagnostics.Identifier_expected);
+            });
+            return state_1;
         }
-        function parseIdentifier(diagnosticMessage) {
-            return createIdentifier(isIdentifier(), diagnosticMessage);
+        else if (node.kind === 233 /* ModuleDeclaration */) {
+            var body = node.body;
+            return body ? getModuleInstanceState(body) : 1 /* Instantiated */;
         }
-        function parseIdentifierName() {
-            return createIdentifier(ts.tokenIsIdentifierOrKeyword(token()));
+        else if (node.kind === 71 /* Identifier */ && node.isInJSDocNamespace) {
+            return 0 /* NonInstantiated */;
         }
-        function isLiteralPropertyName() {
-            return ts.tokenIsIdentifierOrKeyword(token()) ||
-                token() === 9 /* StringLiteral */ ||
-                token() === 8 /* NumericLiteral */;
+        else {
+            return 1 /* Instantiated */;
         }
-        function parsePropertyNameWorker(allowComputedPropertyNames) {
-            if (token() === 9 /* StringLiteral */ || token() === 8 /* NumericLiteral */) {
-                return parseLiteralNode(/*internName*/ true);
-            }
-            if (allowComputedPropertyNames && token() === 19 /* OpenBracketToken */) {
-                return parseComputedPropertyName();
+    }
+    ts.getModuleInstanceState = getModuleInstanceState;
+    var ContainerFlags;
+    (function (ContainerFlags) {
+        // The current node is not a container, and no container manipulation should happen before
+        // recursing into it.
+        ContainerFlags[ContainerFlags["None"] = 0] = "None";
+        // The current node is a container.  It should be set as the current container (and block-
+        // container) before recursing into it.  The current node does not have locals.  Examples:
+        //
+        //      Classes, ObjectLiterals, TypeLiterals, Interfaces...
+        ContainerFlags[ContainerFlags["IsContainer"] = 1] = "IsContainer";
+        // The current node is a block-scoped-container.  It should be set as the current block-
+        // container before recursing into it.  Examples:
+        //
+        //      Blocks (when not parented by functions), Catch clauses, For/For-in/For-of statements...
+        ContainerFlags[ContainerFlags["IsBlockScopedContainer"] = 2] = "IsBlockScopedContainer";
+        // The current node is the container of a control flow path. The current control flow should
+        // be saved and restored, and a new control flow initialized within the container.
+        ContainerFlags[ContainerFlags["IsControlFlowContainer"] = 4] = "IsControlFlowContainer";
+        ContainerFlags[ContainerFlags["IsFunctionLike"] = 8] = "IsFunctionLike";
+        ContainerFlags[ContainerFlags["IsFunctionExpression"] = 16] = "IsFunctionExpression";
+        ContainerFlags[ContainerFlags["HasLocals"] = 32] = "HasLocals";
+        ContainerFlags[ContainerFlags["IsInterface"] = 64] = "IsInterface";
+        ContainerFlags[ContainerFlags["IsObjectLiteralOrClassExpressionMethod"] = 128] = "IsObjectLiteralOrClassExpressionMethod";
+    })(ContainerFlags || (ContainerFlags = {}));
+    var binder = createBinder();
+    function bindSourceFile(file, options) {
+        ts.performance.mark("beforeBind");
+        binder(file, options);
+        ts.performance.mark("afterBind");
+        ts.performance.measure("Bind", "beforeBind", "afterBind");
+    }
+    ts.bindSourceFile = bindSourceFile;
+    function createBinder() {
+        var file;
+        var options;
+        var languageVersion;
+        var parent;
+        var container;
+        var blockScopeContainer;
+        var lastContainer;
+        var seenThisKeyword;
+        // state used by control flow analysis
+        var currentFlow;
+        var currentBreakTarget;
+        var currentContinueTarget;
+        var currentReturnTarget;
+        var currentTrueTarget;
+        var currentFalseTarget;
+        var preSwitchCaseFlow;
+        var activeLabels;
+        var hasExplicitReturn;
+        // state used for emit helpers
+        var emitFlags;
+        // If this file is an external module, then it is automatically in strict-mode according to
+        // ES6.  If it is not an external module, then we'll determine if it is in strict mode or
+        // not depending on if we see "use strict" in certain places or if we hit a class/namespace
+        // or if compiler options contain alwaysStrict.
+        var inStrictMode;
+        var symbolCount = 0;
+        var Symbol;
+        var classifiableNames;
+        var unreachableFlow = { flags: 1 /* Unreachable */ };
+        var reportedUnreachableFlow = { flags: 1 /* Unreachable */ };
+        // state used to aggregate transform flags during bind.
+        var subtreeTransformFlags = 0 /* None */;
+        var skipTransformFlagAggregation;
+        function bindSourceFile(f, opts) {
+            file = f;
+            options = opts;
+            languageVersion = ts.getEmitScriptTarget(options);
+            inStrictMode = bindInStrictMode(file, opts);
+            classifiableNames = ts.createMap();
+            symbolCount = 0;
+            skipTransformFlagAggregation = file.isDeclarationFile;
+            Symbol = ts.objectAllocator.getSymbolConstructor();
+            if (!file.locals) {
+                bind(file);
+                file.symbolCount = symbolCount;
+                file.classifiableNames = classifiableNames;
             }
-            return parseIdentifierName();
-        }
-        function parsePropertyName() {
-            return parsePropertyNameWorker(/*allowComputedPropertyNames*/ true);
-        }
-        function parseSimplePropertyName() {
-            return parsePropertyNameWorker(/*allowComputedPropertyNames*/ false);
-        }
-        function isSimplePropertyName() {
-            return token() === 9 /* StringLiteral */ || token() === 8 /* NumericLiteral */ || ts.tokenIsIdentifierOrKeyword(token());
-        }
-        function parseComputedPropertyName() {
-            // PropertyName [Yield]:
-            //      LiteralPropertyName
-            //      ComputedPropertyName[?Yield]
-            var node = createNode(140 /* ComputedPropertyName */);
-            parseExpected(19 /* OpenBracketToken */);
-            // We parse any expression (including a comma expression). But the grammar
-            // says that only an assignment expression is allowed, so the grammar checker
-            // will error if it sees a comma expression.
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(20 /* CloseBracketToken */);
-            return finishNode(node);
-        }
-        function parseContextualModifier(t) {
-            return token() === t && tryParse(nextTokenCanFollowModifier);
+            file = undefined;
+            options = undefined;
+            languageVersion = undefined;
+            parent = undefined;
+            container = undefined;
+            blockScopeContainer = undefined;
+            lastContainer = undefined;
+            seenThisKeyword = false;
+            currentFlow = undefined;
+            currentBreakTarget = undefined;
+            currentContinueTarget = undefined;
+            currentReturnTarget = undefined;
+            currentTrueTarget = undefined;
+            currentFalseTarget = undefined;
+            activeLabels = undefined;
+            hasExplicitReturn = false;
+            emitFlags = 0 /* None */;
+            subtreeTransformFlags = 0 /* None */;
         }
-        function nextTokenIsOnSameLineAndCanFollowModifier() {
-            nextToken();
-            if (scanner.hasPrecedingLineBreak()) {
-                return false;
+        return bindSourceFile;
+        function bindInStrictMode(file, opts) {
+            if ((opts.alwaysStrict === undefined ? opts.strict : opts.alwaysStrict) && !file.isDeclarationFile) {
+                // bind in strict mode source files with alwaysStrict option
+                return true;
+            }
+            else {
+                return !!file.externalModuleIndicator;
             }
-            return canFollowModifier();
         }
-        function nextTokenCanFollowModifier() {
-            if (token() === 74 /* ConstKeyword */) {
-                // 'const' is only a modifier if followed by 'enum'.
-                return nextToken() === 81 /* EnumKeyword */;
+        function createSymbol(flags, name) {
+            symbolCount++;
+            return new Symbol(flags, name);
+        }
+        function addDeclarationToSymbol(symbol, node, symbolFlags) {
+            symbol.flags |= symbolFlags;
+            node.symbol = symbol;
+            if (!symbol.declarations) {
+                symbol.declarations = [];
             }
-            if (token() === 82 /* ExportKeyword */) {
-                nextToken();
-                if (token() === 77 /* DefaultKeyword */) {
-                    return lookAhead(nextTokenIsClassOrFunctionOrAsync);
-                }
-                return token() !== 37 /* AsteriskToken */ && token() !== 116 /* AsKeyword */ && token() !== 15 /* OpenBraceToken */ && canFollowModifier();
+            symbol.declarations.push(node);
+            if (symbolFlags & 1952 /* HasExports */ && !symbol.exports) {
+                symbol.exports = ts.createMap();
             }
-            if (token() === 77 /* DefaultKeyword */) {
-                return nextTokenIsClassOrFunctionOrAsync();
+            if (symbolFlags & 6240 /* HasMembers */ && !symbol.members) {
+                symbol.members = ts.createMap();
             }
-            if (token() === 113 /* StaticKeyword */) {
-                nextToken();
-                return canFollowModifier();
+            if (symbolFlags & 107455 /* Value */) {
+                var valueDeclaration = symbol.valueDeclaration;
+                if (!valueDeclaration ||
+                    (valueDeclaration.kind !== node.kind && valueDeclaration.kind === 233 /* ModuleDeclaration */)) {
+                    // other kinds of value declarations take precedence over modules
+                    symbol.valueDeclaration = node;
+                }
             }
-            return nextTokenIsOnSameLineAndCanFollowModifier();
-        }
-        function parseAnyContextualModifier() {
-            return ts.isModifierKind(token()) && tryParse(nextTokenCanFollowModifier);
-        }
-        function canFollowModifier() {
-            return token() === 19 /* OpenBracketToken */
-                || token() === 15 /* OpenBraceToken */
-                || token() === 37 /* AsteriskToken */
-                || token() === 22 /* DotDotDotToken */
-                || isLiteralPropertyName();
-        }
-        function nextTokenIsClassOrFunctionOrAsync() {
-            nextToken();
-            return token() === 73 /* ClassKeyword */ || token() === 87 /* FunctionKeyword */ ||
-                (token() === 118 /* AsyncKeyword */ && lookAhead(nextTokenIsFunctionKeywordOnSameLine));
         }
-        // True if positioned at the start of a list element
-        function isListElement(parsingContext, inErrorRecovery) {
-            var node = currentNode(parsingContext);
-            if (node) {
-                return true;
-            }
-            switch (parsingContext) {
-                case 0 /* SourceElements */:
-                case 1 /* BlockStatements */:
-                case 3 /* SwitchClauseStatements */:
-                    // If we're in error recovery, then we don't want to treat ';' as an empty statement.
-                    // The problem is that ';' can show up in far too many contexts, and if we see one
-                    // and assume it's a statement, then we may bail out inappropriately from whatever
-                    // we're parsing.  For example, if we have a semicolon in the middle of a class, then
-                    // we really don't want to assume the class is over and we're on a statement in the
-                    // outer module.  We just want to consume and move on.
-                    return !(token() === 23 /* SemicolonToken */ && inErrorRecovery) && isStartOfStatement();
-                case 2 /* SwitchClauses */:
-                    return token() === 71 /* CaseKeyword */ || token() === 77 /* DefaultKeyword */;
-                case 4 /* TypeMembers */:
-                    return lookAhead(isTypeMemberStart);
-                case 5 /* ClassMembers */:
-                    // We allow semicolons as class elements (as specified by ES6) as long as we're
-                    // not in error recovery.  If we're in error recovery, we don't want an errant
-                    // semicolon to be treated as a class member (since they're almost always used
-                    // for statements.
-                    return lookAhead(isClassMemberStart) || (token() === 23 /* SemicolonToken */ && !inErrorRecovery);
-                case 6 /* EnumMembers */:
-                    // Include open bracket computed properties. This technically also lets in indexers,
-                    // which would be a candidate for improved error reporting.
-                    return token() === 19 /* OpenBracketToken */ || isLiteralPropertyName();
-                case 12 /* ObjectLiteralMembers */:
-                    return token() === 19 /* OpenBracketToken */ || token() === 37 /* AsteriskToken */ || isLiteralPropertyName();
-                case 9 /* ObjectBindingElements */:
-                    return token() === 19 /* OpenBracketToken */ || isLiteralPropertyName();
-                case 7 /* HeritageClauseElement */:
-                    // If we see { } then only consume it as an expression if it is followed by , or {
-                    // That way we won't consume the body of a class in its heritage clause.
-                    if (token() === 15 /* OpenBraceToken */) {
-                        return lookAhead(isValidHeritageClauseObjectLiteral);
+        // Should not be called on a declaration with a computed property name,
+        // unless it is a well known Symbol.
+        function getDeclarationName(node) {
+            var name = ts.getNameOfDeclaration(node);
+            if (name) {
+                if (ts.isAmbientModule(node)) {
+                    return ts.isGlobalScopeAugmentation(node) ? "__global" : "\"" + name.text + "\"";
+                }
+                if (name.kind === 144 /* ComputedPropertyName */) {
+                    var nameExpression = name.expression;
+                    // treat computed property names where expression is string/numeric literal as just string/numeric literal
+                    if (ts.isStringOrNumericLiteral(nameExpression)) {
+                        return nameExpression.text;
                     }
-                    if (!inErrorRecovery) {
-                        return isStartOfLeftHandSideExpression() && !isHeritageClauseExtendsOrImplementsKeyword();
+                    ts.Debug.assert(ts.isWellKnownSymbolSyntactically(nameExpression));
+                    return ts.getPropertyNameForKnownSymbolName(nameExpression.name.text);
+                }
+                return name.text;
+            }
+            switch (node.kind) {
+                case 152 /* Constructor */:
+                    return "__constructor";
+                case 160 /* FunctionType */:
+                case 155 /* CallSignature */:
+                    return "__call";
+                case 161 /* ConstructorType */:
+                case 156 /* ConstructSignature */:
+                    return "__new";
+                case 157 /* IndexSignature */:
+                    return "__index";
+                case 244 /* ExportDeclaration */:
+                    return "__export";
+                case 243 /* ExportAssignment */:
+                    return node.isExportEquals ? "export=" : "default";
+                case 194 /* BinaryExpression */:
+                    if (ts.getSpecialPropertyAssignmentKind(node) === 2 /* ModuleExports */) {
+                        // module.exports = ...
+                        return "export=";
                     }
-                    else {
-                        // If we're in error recovery we tighten up what we're willing to match.
-                        // That way we don't treat something like "this" as a valid heritage clause
-                        // element during recovery.
-                        return isIdentifier() && !isHeritageClauseExtendsOrImplementsKeyword();
+                    ts.Debug.fail("Unknown binary declaration kind");
+                    break;
+                case 228 /* FunctionDeclaration */:
+                case 229 /* ClassDeclaration */:
+                    return ts.hasModifier(node, 512 /* Default */) ? "default" : undefined;
+                case 279 /* JSDocFunctionType */:
+                    return ts.isJSDocConstructSignature(node) ? "__new" : "__call";
+                case 146 /* Parameter */:
+                    // Parameters with names are handled at the top of this function.  Parameters
+                    // without names can only come from JSDocFunctionTypes.
+                    ts.Debug.assert(node.parent.kind === 279 /* JSDocFunctionType */);
+                    var functionType = node.parent;
+                    var index = ts.indexOf(functionType.parameters, node);
+                    return "arg" + index;
+                case 291 /* JSDocTypedefTag */:
+                    var parentNode = node.parent && node.parent.parent;
+                    var nameFromParentNode = void 0;
+                    if (parentNode && parentNode.kind === 208 /* VariableStatement */) {
+                        if (parentNode.declarationList.declarations.length > 0) {
+                            var nameIdentifier = parentNode.declarationList.declarations[0].name;
+                            if (nameIdentifier.kind === 71 /* Identifier */) {
+                                nameFromParentNode = nameIdentifier.text;
+                            }
+                        }
                     }
-                case 8 /* VariableDeclarations */:
-                    return isIdentifierOrPattern();
-                case 10 /* ArrayBindingElements */:
-                    return token() === 24 /* CommaToken */ || token() === 22 /* DotDotDotToken */ || isIdentifierOrPattern();
-                case 17 /* TypeParameters */:
-                    return isIdentifier();
-                case 11 /* ArgumentExpressions */:
-                case 15 /* ArrayLiteralMembers */:
-                    return token() === 24 /* CommaToken */ || token() === 22 /* DotDotDotToken */ || isStartOfExpression();
-                case 16 /* Parameters */:
-                    return isStartOfParameter();
-                case 18 /* TypeArguments */:
-                case 19 /* TupleElementTypes */:
-                    return token() === 24 /* CommaToken */ || isStartOfType();
-                case 20 /* HeritageClauses */:
-                    return isHeritageClause();
-                case 21 /* ImportOrExportSpecifiers */:
-                    return ts.tokenIsIdentifierOrKeyword(token());
-                case 13 /* JsxAttributes */:
-                    return ts.tokenIsIdentifierOrKeyword(token()) || token() === 15 /* OpenBraceToken */;
-                case 14 /* JsxChildren */:
-                    return true;
-                case 22 /* JSDocFunctionParameters */:
-                case 23 /* JSDocTypeArguments */:
-                case 25 /* JSDocTupleTypes */:
-                    return JSDocParser.isJSDocType();
-                case 24 /* JSDocRecordMembers */:
-                    return isSimplePropertyName();
-            }
-            ts.Debug.fail("Non-exhaustive case in 'isListElement'.");
-        }
-        function isValidHeritageClauseObjectLiteral() {
-            ts.Debug.assert(token() === 15 /* OpenBraceToken */);
-            if (nextToken() === 16 /* CloseBraceToken */) {
-                // if we see  "extends {}" then only treat the {} as what we're extending (and not
-                // the class body) if we have:
-                //
-                //      extends {} {
-                //      extends {},
-                //      extends {} extends
-                //      extends {} implements
-                var next = nextToken();
-                return next === 24 /* CommaToken */ || next === 15 /* OpenBraceToken */ || next === 83 /* ExtendsKeyword */ || next === 106 /* ImplementsKeyword */;
-            }
-            return true;
-        }
-        function nextTokenIsIdentifier() {
-            nextToken();
-            return isIdentifier();
-        }
-        function nextTokenIsIdentifierOrKeyword() {
-            nextToken();
-            return ts.tokenIsIdentifierOrKeyword(token());
-        }
-        function isHeritageClauseExtendsOrImplementsKeyword() {
-            if (token() === 106 /* ImplementsKeyword */ ||
-                token() === 83 /* ExtendsKeyword */) {
-                return lookAhead(nextTokenIsStartOfExpression);
+                    return nameFromParentNode;
             }
-            return false;
-        }
-        function nextTokenIsStartOfExpression() {
-            nextToken();
-            return isStartOfExpression();
         }
-        // True if positioned at a list terminator
-        function isListTerminator(kind) {
-            if (token() === 1 /* EndOfFileToken */) {
-                // Being at the end of the file ends all lists.
-                return true;
-            }
-            switch (kind) {
-                case 1 /* BlockStatements */:
-                case 2 /* SwitchClauses */:
-                case 4 /* TypeMembers */:
-                case 5 /* ClassMembers */:
-                case 6 /* EnumMembers */:
-                case 12 /* ObjectLiteralMembers */:
-                case 9 /* ObjectBindingElements */:
-                case 21 /* ImportOrExportSpecifiers */:
-                    return token() === 16 /* CloseBraceToken */;
-                case 3 /* SwitchClauseStatements */:
-                    return token() === 16 /* CloseBraceToken */ || token() === 71 /* CaseKeyword */ || token() === 77 /* DefaultKeyword */;
-                case 7 /* HeritageClauseElement */:
-                    return token() === 15 /* OpenBraceToken */ || token() === 83 /* ExtendsKeyword */ || token() === 106 /* ImplementsKeyword */;
-                case 8 /* VariableDeclarations */:
-                    return isVariableDeclaratorListTerminator();
-                case 17 /* TypeParameters */:
-                    // Tokens other than '>' are here for better error recovery
-                    return token() === 27 /* GreaterThanToken */ || token() === 17 /* OpenParenToken */ || token() === 15 /* OpenBraceToken */ || token() === 83 /* ExtendsKeyword */ || token() === 106 /* ImplementsKeyword */;
-                case 11 /* ArgumentExpressions */:
-                    // Tokens other than ')' are here for better error recovery
-                    return token() === 18 /* CloseParenToken */ || token() === 23 /* SemicolonToken */;
-                case 15 /* ArrayLiteralMembers */:
-                case 19 /* TupleElementTypes */:
-                case 10 /* ArrayBindingElements */:
-                    return token() === 20 /* CloseBracketToken */;
-                case 16 /* Parameters */:
-                    // Tokens other than ')' and ']' (the latter for index signatures) are here for better error recovery
-                    return token() === 18 /* CloseParenToken */ || token() === 20 /* CloseBracketToken */ /*|| token === SyntaxKind.OpenBraceToken*/;
-                case 18 /* TypeArguments */:
-                    // Tokens other than '>' are here for better error recovery
-                    return token() === 27 /* GreaterThanToken */ || token() === 17 /* OpenParenToken */;
-                case 20 /* HeritageClauses */:
-                    return token() === 15 /* OpenBraceToken */ || token() === 16 /* CloseBraceToken */;
-                case 13 /* JsxAttributes */:
-                    return token() === 27 /* GreaterThanToken */ || token() === 39 /* SlashToken */;
-                case 14 /* JsxChildren */:
-                    return token() === 25 /* LessThanToken */ && lookAhead(nextTokenIsSlash);
-                case 22 /* JSDocFunctionParameters */:
-                    return token() === 18 /* CloseParenToken */ || token() === 54 /* ColonToken */ || token() === 16 /* CloseBraceToken */;
-                case 23 /* JSDocTypeArguments */:
-                    return token() === 27 /* GreaterThanToken */ || token() === 16 /* CloseBraceToken */;
-                case 25 /* JSDocTupleTypes */:
-                    return token() === 20 /* CloseBracketToken */ || token() === 16 /* CloseBraceToken */;
-                case 24 /* JSDocRecordMembers */:
-                    return token() === 16 /* CloseBraceToken */;
-            }
+        function getDisplayName(node) {
+            return node.name ? ts.declarationNameToString(node.name) : getDeclarationName(node);
         }
-        function isVariableDeclaratorListTerminator() {
-            // If we can consume a semicolon (either explicitly, or with ASI), then consider us done
-            // with parsing the list of  variable declarators.
-            if (canParseSemicolon()) {
-                return true;
-            }
-            // in the case where we're parsing the variable declarator of a 'for-in' statement, we
-            // are done if we see an 'in' keyword in front of us. Same with for-of
-            if (isInOrOfKeyword(token())) {
-                return true;
-            }
-            // ERROR RECOVERY TWEAK:
-            // For better error recovery, if we see an '=>' then we just stop immediately.  We've got an
-            // arrow function here and it's going to be very unlikely that we'll resynchronize and get
-            // another variable declaration.
-            if (token() === 34 /* EqualsGreaterThanToken */) {
-                return true;
+        /**
+         * Declares a Symbol for the node and adds it to symbols. Reports errors for conflicting identifier names.
+         * @param symbolTable - The symbol table which node will be added to.
+         * @param parent - node's parent declaration.
+         * @param node - The declaration to be added to the symbol table
+         * @param includes - The SymbolFlags that node has in addition to its declaration type (eg: export, ambient, etc.)
+         * @param excludes - The flags which node cannot be declared alongside in a symbol table. Used to report forbidden declarations.
+         */
+        function declareSymbol(symbolTable, parent, node, includes, excludes) {
+            ts.Debug.assert(!ts.hasDynamicName(node));
+            var isDefaultExport = ts.hasModifier(node, 512 /* Default */);
+            // The exported symbol for an export default function/class node is always named "default"
+            var name = isDefaultExport && parent ? "default" : getDeclarationName(node);
+            var symbol;
+            if (name === undefined) {
+                symbol = createSymbol(0 /* None */, "__missing");
             }
-            // Keep trying to parse out variable declarators.
-            return false;
-        }
-        // True if positioned at element or terminator of the current list or any enclosing list
-        function isInSomeParsingContext() {
-            for (var kind = 0; kind < 26 /* Count */; kind++) {
-                if (parsingContext & (1 << kind)) {
-                    if (isListElement(kind, /*inErrorRecovery*/ true) || isListTerminator(kind)) {
-                        return true;
+            else {
+                // Check and see if the symbol table already has a symbol with this name.  If not,
+                // create a new symbol with this name and add it to the table.  Note that we don't
+                // give the new symbol any flags *yet*.  This ensures that it will not conflict
+                // with the 'excludes' flags we pass in.
+                //
+                // If we do get an existing symbol, see if it conflicts with the new symbol we're
+                // creating.  For example, a 'var' symbol and a 'class' symbol will conflict within
+                // the same symbol table.  If we have a conflict, report the issue on each
+                // declaration we have for this symbol, and then create a new symbol for this
+                // declaration.
+                //
+                // Note that when properties declared in Javascript constructors
+                // (marked by isReplaceableByMethod) conflict with another symbol, the property loses.
+                // Always. This allows the common Javascript pattern of overwriting a prototype method
+                // with an bound instance method of the same type: `this.method = this.method.bind(this)`
+                //
+                // If we created a new symbol, either because we didn't have a symbol with this name
+                // in the symbol table, or we conflicted with an existing symbol, then just add this
+                // node as the sole declaration of the new symbol.
+                //
+                // Otherwise, we'll be merging into a compatible existing symbol (for example when
+                // you have multiple 'vars' with the same name in the same container).  In this case
+                // just add this node into the declarations list of the symbol.
+                symbol = symbolTable.get(name);
+                if (!symbol) {
+                    symbolTable.set(name, symbol = createSymbol(0 /* None */, name));
+                }
+                if (name && (includes & 788448 /* Classifiable */)) {
+                    classifiableNames.set(name, name);
+                }
+                if (symbol.flags & excludes) {
+                    if (symbol.isReplaceableByMethod) {
+                        // Javascript constructor-declared symbols can be discarded in favor of
+                        // prototype symbols like methods.
+                        symbolTable.set(name, symbol = createSymbol(0 /* None */, name));
+                    }
+                    else {
+                        if (node.name) {
+                            node.name.parent = node;
+                        }
+                        // Report errors every position with duplicate declaration
+                        // Report errors on previous encountered declarations
+                        var message_1 = symbol.flags & 2 /* BlockScopedVariable */
+                            ? ts.Diagnostics.Cannot_redeclare_block_scoped_variable_0
+                            : ts.Diagnostics.Duplicate_identifier_0;
+                        if (symbol.declarations && symbol.declarations.length) {
+                            // If the current node is a default export of some sort, then check if
+                            // there are any other default exports that we need to error on.
+                            // We'll know whether we have other default exports depending on if `symbol` already has a declaration list set.
+                            if (isDefaultExport) {
+                                message_1 = ts.Diagnostics.A_module_cannot_have_multiple_default_exports;
+                            }
+                            else {
+                                // This is to properly report an error in the case "export default { }" is after export default of class declaration or function declaration.
+                                // Error on multiple export default in the following case:
+                                // 1. multiple export default of class declaration or function declaration by checking NodeFlags.Default
+                                // 2. multiple export default of export assignment. This one doesn't have NodeFlags.Default on (as export default doesn't considered as modifiers)
+                                if (symbol.declarations && symbol.declarations.length &&
+                                    (isDefaultExport || (node.kind === 243 /* ExportAssignment */ && !node.isExportEquals))) {
+                                    message_1 = ts.Diagnostics.A_module_cannot_have_multiple_default_exports;
+                                }
+                            }
+                        }
+                        ts.forEach(symbol.declarations, function (declaration) {
+                            file.bindDiagnostics.push(ts.createDiagnosticForNode(ts.getNameOfDeclaration(declaration) || declaration, message_1, getDisplayName(declaration)));
+                        });
+                        file.bindDiagnostics.push(ts.createDiagnosticForNode(ts.getNameOfDeclaration(node) || node, message_1, getDisplayName(node)));
+                        symbol = createSymbol(0 /* None */, name);
                     }
                 }
             }
-            return false;
+            addDeclarationToSymbol(symbol, node, includes);
+            symbol.parent = parent;
+            return symbol;
         }
-        // Parses a list of elements
-        function parseList(kind, parseElement) {
-            var saveParsingContext = parsingContext;
-            parsingContext |= 1 << kind;
-            var result = createNodeArray();
-            while (!isListTerminator(kind)) {
-                if (isListElement(kind, /*inErrorRecovery*/ false)) {
-                    var element = parseListElement(kind, parseElement);
-                    result.push(element);
-                    continue;
+        function declareModuleMember(node, symbolFlags, symbolExcludes) {
+            var hasExportModifier = ts.getCombinedModifierFlags(node) & 1 /* Export */;
+            if (symbolFlags & 8388608 /* Alias */) {
+                if (node.kind === 246 /* ExportSpecifier */ || (node.kind === 237 /* ImportEqualsDeclaration */ && hasExportModifier)) {
+                    return declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
                 }
-                if (abortParsingListOrMoveToNextToken(kind)) {
-                    break;
+                else {
+                    return declareSymbol(container.locals, /*parent*/ undefined, node, symbolFlags, symbolExcludes);
                 }
             }
-            result.end = getNodeEnd();
-            parsingContext = saveParsingContext;
-            return result;
-        }
-        function parseListElement(parsingContext, parseElement) {
-            var node = currentNode(parsingContext);
-            if (node) {
-                return consumeNode(node);
+            else {
+                // Exported module members are given 2 symbols: A local symbol that is classified with an ExportValue,
+                // ExportType, or ExportContainer flag, and an associated export symbol with all the correct flags set
+                // on it. There are 2 main reasons:
+                //
+                //   1. We treat locals and exports of the same name as mutually exclusive within a container.
+                //      That means the binder will issue a Duplicate Identifier error if you mix locals and exports
+                //      with the same name in the same container.
+                //      TODO: Make this a more specific error and decouple it from the exclusion logic.
+                //   2. When we checkIdentifier in the checker, we set its resolved symbol to the local symbol,
+                //      but return the export symbol (by calling getExportSymbolOfValueSymbolIfExported). That way
+                //      when the emitter comes back to it, it knows not to qualify the name if it was found in a containing scope.
+                // NOTE: Nested ambient modules always should go to to 'locals' table to prevent their automatic merge
+                //       during global merging in the checker. Why? The only case when ambient module is permitted inside another module is module augmentation
+                //       and this case is specially handled. Module augmentations should only be merged with original module definition
+                //       and should never be merged directly with other augmentation, and the latter case would be possible if automatic merge is allowed.
+                if (node.kind === 291 /* JSDocTypedefTag */)
+                    ts.Debug.assert(ts.isInJavaScriptFile(node)); // We shouldn't add symbols for JSDoc nodes if not in a JS file.
+                var isJSDocTypedefInJSDocNamespace = node.kind === 291 /* JSDocTypedefTag */ &&
+                    node.name &&
+                    node.name.kind === 71 /* Identifier */ &&
+                    node.name.isInJSDocNamespace;
+                if ((!ts.isAmbientModule(node) && (hasExportModifier || container.flags & 32 /* ExportContext */)) || isJSDocTypedefInJSDocNamespace) {
+                    var exportKind = (symbolFlags & 107455 /* Value */ ? 1048576 /* ExportValue */ : 0) |
+                        (symbolFlags & 793064 /* Type */ ? 2097152 /* ExportType */ : 0) |
+                        (symbolFlags & 1920 /* Namespace */ ? 4194304 /* ExportNamespace */ : 0);
+                    var local = declareSymbol(container.locals, /*parent*/ undefined, node, exportKind, symbolExcludes);
+                    local.exportSymbol = declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
+                    node.localSymbol = local;
+                    return local;
+                }
+                else {
+                    return declareSymbol(container.locals, /*parent*/ undefined, node, symbolFlags, symbolExcludes);
+                }
             }
-            return parseElement();
         }
-        function currentNode(parsingContext) {
-            // If there is an outstanding parse error that we've encountered, but not attached to
-            // some node, then we cannot get a node from the old source tree.  This is because we
-            // want to mark the next node we encounter as being unusable.
-            //
-            // Note: This may be too conservative.  Perhaps we could reuse the node and set the bit
-            // on it (or its leftmost child) as having the error.  For now though, being conservative
-            // is nice and likely won't ever affect perf.
-            if (parseErrorBeforeNextFinishedNode) {
-                return undefined;
-            }
-            if (!syntaxCursor) {
-                // if we don't have a cursor, we could never return a node from the old tree.
-                return undefined;
-            }
-            var node = syntaxCursor.currentNode(scanner.getStartPos());
-            // Can't reuse a missing node.
-            if (ts.nodeIsMissing(node)) {
-                return undefined;
-            }
-            // Can't reuse a node that intersected the change range.
-            if (node.intersectsChange) {
-                return undefined;
-            }
-            // Can't reuse a node that contains a parse error.  This is necessary so that we
-            // produce the same set of errors again.
-            if (ts.containsParseError(node)) {
-                return undefined;
-            }
-            // We can only reuse a node if it was parsed under the same strict mode that we're
-            // currently in.  i.e. if we originally parsed a node in non-strict mode, but then
-            // the user added 'using strict' at the top of the file, then we can't use that node
-            // again as the presence of strict mode may cause us to parse the tokens in the file
-            // differently.
+        // All container nodes are kept on a linked list in declaration order. This list is used by
+        // the getLocalNameOfContainer function in the type checker to validate that the local name
+        // used for a container is unique.
+        function bindContainer(node, containerFlags) {
+            // Before we recurse into a node's children, we first save the existing parent, container
+            // and block-container.  Then after we pop out of processing the children, we restore
+            // these saved values.
+            var saveContainer = container;
+            var savedBlockScopeContainer = blockScopeContainer;
+            // Depending on what kind of node this is, we may have to adjust the current container
+            // and block-container.   If the current node is a container, then it is automatically
+            // considered the current block-container as well.  Also, for containers that we know
+            // may contain locals, we proactively initialize the .locals field. We do this because
+            // it's highly likely that the .locals will be needed to place some child in (for example,
+            // a parameter, or variable declaration).
             //
-            // Note: we *can* reuse tokens when the strict mode changes.  That's because tokens
-            // are unaffected by strict mode.  It's just the parser will decide what to do with it
-            // differently depending on what mode it is in.
+            // However, we do not proactively create the .locals for block-containers because it's
+            // totally normal and common for block-containers to never actually have a block-scoped
+            // variable in them.  We don't want to end up allocating an object for every 'block' we
+            // run into when most of them won't be necessary.
             //
-            // This also applies to all our other context flags as well.
-            var nodeContextFlags = node.flags & 1540096 /* ContextFlags */;
-            if (nodeContextFlags !== contextFlags) {
-                return undefined;
-            }
-            // Ok, we have a node that looks like it could be reused.  Now verify that it is valid
-            // in the current list parsing context that we're currently at.
-            if (!canReuseNode(node, parsingContext)) {
-                return undefined;
+            // Finally, if this is a block-container, then we clear out any existing .locals object
+            // it may contain within it.  This happens in incremental scenarios.  Because we can be
+            // reusing a node from a previous compilation, that node may have had 'locals' created
+            // for it.  We must clear this so we don't accidentally move any stale data forward from
+            // a previous compilation.
+            if (containerFlags & 1 /* IsContainer */) {
+                container = blockScopeContainer = node;
+                if (containerFlags & 32 /* HasLocals */) {
+                    container.locals = ts.createMap();
+                }
+                addToContainerChain(container);
             }
-            return node;
-        }
-        function consumeNode(node) {
-            // Move the scanner so it is after the node we just consumed.
-            scanner.setTextPos(node.end);
-            nextToken();
-            return node;
-        }
-        function canReuseNode(node, parsingContext) {
-            switch (parsingContext) {
-                case 5 /* ClassMembers */:
-                    return isReusableClassMember(node);
-                case 2 /* SwitchClauses */:
-                    return isReusableSwitchClause(node);
-                case 0 /* SourceElements */:
-                case 1 /* BlockStatements */:
-                case 3 /* SwitchClauseStatements */:
-                    return isReusableStatement(node);
-                case 6 /* EnumMembers */:
-                    return isReusableEnumMember(node);
-                case 4 /* TypeMembers */:
-                    return isReusableTypeMember(node);
-                case 8 /* VariableDeclarations */:
-                    return isReusableVariableDeclaration(node);
-                case 16 /* Parameters */:
-                    return isReusableParameter(node);
-                // Any other lists we do not care about reusing nodes in.  But feel free to add if
-                // you can do so safely.  Danger areas involve nodes that may involve speculative
-                // parsing.  If speculative parsing is involved with the node, then the range the
-                // parser reached while looking ahead might be in the edited range (see the example
-                // in canReuseVariableDeclaratorNode for a good case of this).
-                case 20 /* HeritageClauses */:
-                // This would probably be safe to reuse.  There is no speculative parsing with
-                // heritage clauses.
-                case 17 /* TypeParameters */:
-                // This would probably be safe to reuse.  There is no speculative parsing with
-                // type parameters.  Note that that's because type *parameters* only occur in
-                // unambiguous *type* contexts.  While type *arguments* occur in very ambiguous
-                // *expression* contexts.
-                case 19 /* TupleElementTypes */:
-                // This would probably be safe to reuse.  There is no speculative parsing with
-                // tuple types.
-                // Technically, type argument list types are probably safe to reuse.  While
-                // speculative parsing is involved with them (since type argument lists are only
-                // produced from speculative parsing a < as a type argument list), we only have
-                // the types because speculative parsing succeeded.  Thus, the lookahead never
-                // went past the end of the list and rewound.
-                case 18 /* TypeArguments */:
-                // Note: these are almost certainly not safe to ever reuse.  Expressions commonly
-                // need a large amount of lookahead, and we should not reuse them as they may
-                // have actually intersected the edit.
-                case 11 /* ArgumentExpressions */:
-                // This is not safe to reuse for the same reason as the 'AssignmentExpression'
-                // cases.  i.e. a property assignment may end with an expression, and thus might
-                // have lookahead far beyond it's old node.
-                case 12 /* ObjectLiteralMembers */:
-                // This is probably not safe to reuse.  There can be speculative parsing with
-                // type names in a heritage clause.  There can be generic names in the type
-                // name list, and there can be left hand side expressions (which can have type
-                // arguments.)
-                case 7 /* HeritageClauseElement */:
-                // Perhaps safe to reuse, but it's unlikely we'd see more than a dozen attributes
-                // on any given element. Same for children.
-                case 13 /* JsxAttributes */:
-                case 14 /* JsxChildren */:
+            else if (containerFlags & 2 /* IsBlockScopedContainer */) {
+                blockScopeContainer = node;
+                blockScopeContainer.locals = undefined;
             }
-            return false;
-        }
-        function isReusableClassMember(node) {
-            if (node) {
-                switch (node.kind) {
-                    case 148 /* Constructor */:
-                    case 153 /* IndexSignature */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                    case 145 /* PropertyDeclaration */:
-                    case 198 /* SemicolonClassElement */:
-                        return true;
-                    case 147 /* MethodDeclaration */:
-                        // Method declarations are not necessarily reusable.  An object-literal
-                        // may have a method calls "constructor(...)" and we must reparse that
-                        // into an actual .ConstructorDeclaration.
-                        var methodDeclaration = node;
-                        var nameIsConstructor = methodDeclaration.name.kind === 69 /* Identifier */ &&
-                            methodDeclaration.name.originalKeywordKind === 121 /* ConstructorKeyword */;
-                        return !nameIsConstructor;
+            if (containerFlags & 4 /* IsControlFlowContainer */) {
+                var saveCurrentFlow = currentFlow;
+                var saveBreakTarget = currentBreakTarget;
+                var saveContinueTarget = currentContinueTarget;
+                var saveReturnTarget = currentReturnTarget;
+                var saveActiveLabels = activeLabels;
+                var saveHasExplicitReturn = hasExplicitReturn;
+                var isIIFE = containerFlags & 16 /* IsFunctionExpression */ && !ts.hasModifier(node, 256 /* Async */) && !!ts.getImmediatelyInvokedFunctionExpression(node);
+                // A non-async IIFE is considered part of the containing control flow. Return statements behave
+                // similarly to break statements that exit to a label just past the statement body.
+                if (isIIFE) {
+                    currentReturnTarget = createBranchLabel();
                 }
-            }
-            return false;
-        }
-        function isReusableSwitchClause(node) {
-            if (node) {
-                switch (node.kind) {
-                    case 249 /* CaseClause */:
-                    case 250 /* DefaultClause */:
-                        return true;
+                else {
+                    currentFlow = { flags: 2 /* Start */ };
+                    if (containerFlags & (16 /* IsFunctionExpression */ | 128 /* IsObjectLiteralOrClassExpressionMethod */)) {
+                        currentFlow.container = node;
+                    }
+                    currentReturnTarget = undefined;
                 }
-            }
-            return false;
-        }
-        function isReusableStatement(node) {
-            if (node) {
-                switch (node.kind) {
-                    case 220 /* FunctionDeclaration */:
-                    case 200 /* VariableStatement */:
-                    case 199 /* Block */:
-                    case 203 /* IfStatement */:
-                    case 202 /* ExpressionStatement */:
-                    case 215 /* ThrowStatement */:
-                    case 211 /* ReturnStatement */:
-                    case 213 /* SwitchStatement */:
-                    case 210 /* BreakStatement */:
-                    case 209 /* ContinueStatement */:
-                    case 207 /* ForInStatement */:
-                    case 208 /* ForOfStatement */:
-                    case 206 /* ForStatement */:
-                    case 205 /* WhileStatement */:
-                    case 212 /* WithStatement */:
-                    case 201 /* EmptyStatement */:
-                    case 216 /* TryStatement */:
-                    case 214 /* LabeledStatement */:
-                    case 204 /* DoStatement */:
-                    case 217 /* DebuggerStatement */:
-                    case 230 /* ImportDeclaration */:
-                    case 229 /* ImportEqualsDeclaration */:
-                    case 236 /* ExportDeclaration */:
-                    case 235 /* ExportAssignment */:
-                    case 225 /* ModuleDeclaration */:
-                    case 221 /* ClassDeclaration */:
-                    case 222 /* InterfaceDeclaration */:
-                    case 224 /* EnumDeclaration */:
-                    case 223 /* TypeAliasDeclaration */:
-                        return true;
+                currentBreakTarget = undefined;
+                currentContinueTarget = undefined;
+                activeLabels = undefined;
+                hasExplicitReturn = false;
+                bindChildren(node);
+                // Reset all reachability check related flags on node (for incremental scenarios)
+                node.flags &= ~1408 /* ReachabilityAndEmitFlags */;
+                if (!(currentFlow.flags & 1 /* Unreachable */) && containerFlags & 8 /* IsFunctionLike */ && ts.nodeIsPresent(node.body)) {
+                    node.flags |= 128 /* HasImplicitReturn */;
+                    if (hasExplicitReturn)
+                        node.flags |= 256 /* HasExplicitReturn */;
                 }
-            }
-            return false;
-        }
-        function isReusableEnumMember(node) {
-            return node.kind === 255 /* EnumMember */;
-        }
-        function isReusableTypeMember(node) {
-            if (node) {
-                switch (node.kind) {
-                    case 152 /* ConstructSignature */:
-                    case 146 /* MethodSignature */:
-                    case 153 /* IndexSignature */:
-                    case 144 /* PropertySignature */:
-                    case 151 /* CallSignature */:
-                        return true;
+                if (node.kind === 265 /* SourceFile */) {
+                    node.flags |= emitFlags;
+                }
+                if (isIIFE) {
+                    addAntecedent(currentReturnTarget, currentFlow);
+                    currentFlow = finishFlowLabel(currentReturnTarget);
+                }
+                else {
+                    currentFlow = saveCurrentFlow;
                 }
+                currentBreakTarget = saveBreakTarget;
+                currentContinueTarget = saveContinueTarget;
+                currentReturnTarget = saveReturnTarget;
+                activeLabels = saveActiveLabels;
+                hasExplicitReturn = saveHasExplicitReturn;
             }
-            return false;
-        }
-        function isReusableVariableDeclaration(node) {
-            if (node.kind !== 218 /* VariableDeclaration */) {
-                return false;
+            else if (containerFlags & 64 /* IsInterface */) {
+                seenThisKeyword = false;
+                bindChildren(node);
+                node.flags = seenThisKeyword ? node.flags | 64 /* ContainsThis */ : node.flags & ~64 /* ContainsThis */;
             }
-            // Very subtle incremental parsing bug.  Consider the following code:
-            //
-            //      let v = new List < A, B
-            //
-            // This is actually legal code.  It's a list of variable declarators "v = new List<A"
-            // on one side and "B" on the other. If you then change that to:
-            //
-            //      let v = new List < A, B >()
-            //
-            // then we have a problem.  "v = new List<A" doesn't intersect the change range, so we
-            // start reparsing at "B" and we completely fail to handle this properly.
-            //
-            // In order to prevent this, we do not allow a variable declarator to be reused if it
-            // has an initializer.
-            var variableDeclarator = node;
-            return variableDeclarator.initializer === undefined;
-        }
-        function isReusableParameter(node) {
-            if (node.kind !== 142 /* Parameter */) {
-                return false;
+            else {
+                bindChildren(node);
             }
-            // See the comment in isReusableVariableDeclaration for why we do this.
-            var parameter = node;
-            return parameter.initializer === undefined;
+            container = saveContainer;
+            blockScopeContainer = savedBlockScopeContainer;
         }
-        // Returns true if we should abort parsing.
-        function abortParsingListOrMoveToNextToken(kind) {
-            parseErrorAtCurrentToken(parsingContextErrors(kind));
-            if (isInSomeParsingContext()) {
-                return true;
+        function bindChildren(node) {
+            if (skipTransformFlagAggregation) {
+                bindChildrenWorker(node);
+            }
+            else if (node.transformFlags & 536870912 /* HasComputedFlags */) {
+                skipTransformFlagAggregation = true;
+                bindChildrenWorker(node);
+                skipTransformFlagAggregation = false;
+                subtreeTransformFlags |= node.transformFlags & ~getTransformFlagsSubtreeExclusions(node.kind);
+            }
+            else {
+                var savedSubtreeTransformFlags = subtreeTransformFlags;
+                subtreeTransformFlags = 0;
+                bindChildrenWorker(node);
+                subtreeTransformFlags = savedSubtreeTransformFlags | computeTransformFlagsForNode(node, subtreeTransformFlags);
             }
-            nextToken();
-            return false;
         }
-        function parsingContextErrors(context) {
-            switch (context) {
-                case 0 /* SourceElements */: return ts.Diagnostics.Declaration_or_statement_expected;
-                case 1 /* BlockStatements */: return ts.Diagnostics.Declaration_or_statement_expected;
-                case 2 /* SwitchClauses */: return ts.Diagnostics.case_or_default_expected;
-                case 3 /* SwitchClauseStatements */: return ts.Diagnostics.Statement_expected;
-                case 4 /* TypeMembers */: return ts.Diagnostics.Property_or_signature_expected;
-                case 5 /* ClassMembers */: return ts.Diagnostics.Unexpected_token_A_constructor_method_accessor_or_property_was_expected;
-                case 6 /* EnumMembers */: return ts.Diagnostics.Enum_member_expected;
-                case 7 /* HeritageClauseElement */: return ts.Diagnostics.Expression_expected;
-                case 8 /* VariableDeclarations */: return ts.Diagnostics.Variable_declaration_expected;
-                case 9 /* ObjectBindingElements */: return ts.Diagnostics.Property_destructuring_pattern_expected;
-                case 10 /* ArrayBindingElements */: return ts.Diagnostics.Array_element_destructuring_pattern_expected;
-                case 11 /* ArgumentExpressions */: return ts.Diagnostics.Argument_expression_expected;
-                case 12 /* ObjectLiteralMembers */: return ts.Diagnostics.Property_assignment_expected;
-                case 15 /* ArrayLiteralMembers */: return ts.Diagnostics.Expression_or_comma_expected;
-                case 16 /* Parameters */: return ts.Diagnostics.Parameter_declaration_expected;
-                case 17 /* TypeParameters */: return ts.Diagnostics.Type_parameter_declaration_expected;
-                case 18 /* TypeArguments */: return ts.Diagnostics.Type_argument_expected;
-                case 19 /* TupleElementTypes */: return ts.Diagnostics.Type_expected;
-                case 20 /* HeritageClauses */: return ts.Diagnostics.Unexpected_token_expected;
-                case 21 /* ImportOrExportSpecifiers */: return ts.Diagnostics.Identifier_expected;
-                case 13 /* JsxAttributes */: return ts.Diagnostics.Identifier_expected;
-                case 14 /* JsxChildren */: return ts.Diagnostics.Identifier_expected;
-                case 22 /* JSDocFunctionParameters */: return ts.Diagnostics.Parameter_declaration_expected;
-                case 23 /* JSDocTypeArguments */: return ts.Diagnostics.Type_argument_expected;
-                case 25 /* JSDocTupleTypes */: return ts.Diagnostics.Type_expected;
-                case 24 /* JSDocRecordMembers */: return ts.Diagnostics.Property_assignment_expected;
+        function bindEach(nodes) {
+            if (nodes === undefined) {
+                return;
+            }
+            if (skipTransformFlagAggregation) {
+                ts.forEach(nodes, bind);
+            }
+            else {
+                var savedSubtreeTransformFlags = subtreeTransformFlags;
+                subtreeTransformFlags = 0 /* None */;
+                var nodeArrayFlags = 0 /* None */;
+                for (var _i = 0, nodes_2 = nodes; _i < nodes_2.length; _i++) {
+                    var node = nodes_2[_i];
+                    bind(node);
+                    nodeArrayFlags |= node.transformFlags & ~536870912 /* HasComputedFlags */;
+                }
+                nodes.transformFlags = nodeArrayFlags | 536870912 /* HasComputedFlags */;
+                subtreeTransformFlags |= savedSubtreeTransformFlags;
             }
         }
-        ;
-        // Parses a comma-delimited list of elements
-        function parseDelimitedList(kind, parseElement, considerSemicolonAsDelimiter) {
-            var saveParsingContext = parsingContext;
-            parsingContext |= 1 << kind;
-            var result = createNodeArray();
-            var commaStart = -1; // Meaning the previous token was not a comma
-            while (true) {
-                if (isListElement(kind, /*inErrorRecovery*/ false)) {
-                    result.push(parseListElement(kind, parseElement));
-                    commaStart = scanner.getTokenPos();
-                    if (parseOptional(24 /* CommaToken */)) {
-                        continue;
-                    }
-                    commaStart = -1; // Back to the state where the last token was not a comma
-                    if (isListTerminator(kind)) {
-                        break;
+        function bindEachChild(node) {
+            ts.forEachChild(node, bind, bindEach);
+        }
+        function bindChildrenWorker(node) {
+            // Binding of JsDocComment should be done before the current block scope container changes.
+            // because the scope of JsDocComment should not be affected by whether the current node is a
+            // container or not.
+            if (node.jsDoc) {
+                if (ts.isInJavaScriptFile(node)) {
+                    for (var _i = 0, _a = node.jsDoc; _i < _a.length; _i++) {
+                        var j = _a[_i];
+                        bind(j);
                     }
-                    // We didn't get a comma, and the list wasn't terminated, explicitly parse
-                    // out a comma so we give a good error message.
-                    parseExpected(24 /* CommaToken */);
-                    // If the token was a semicolon, and the caller allows that, then skip it and
-                    // continue.  This ensures we get back on track and don't result in tons of
-                    // parse errors.  For example, this can happen when people do things like use
-                    // a semicolon to delimit object literal members.   Note: we'll have already
-                    // reported an error when we called parseExpected above.
-                    if (considerSemicolonAsDelimiter && token() === 23 /* SemicolonToken */ && !scanner.hasPrecedingLineBreak()) {
-                        nextToken();
+                }
+                else {
+                    for (var _b = 0, _c = node.jsDoc; _b < _c.length; _b++) {
+                        var j = _c[_b];
+                        setParentPointers(node, j);
                     }
-                    continue;
                 }
-                if (isListTerminator(kind)) {
+            }
+            if (checkUnreachable(node)) {
+                bindEachChild(node);
+                return;
+            }
+            switch (node.kind) {
+                case 213 /* WhileStatement */:
+                    bindWhileStatement(node);
                     break;
-                }
-                if (abortParsingListOrMoveToNextToken(kind)) {
+                case 212 /* DoStatement */:
+                    bindDoStatement(node);
+                    break;
+                case 214 /* ForStatement */:
+                    bindForStatement(node);
+                    break;
+                case 215 /* ForInStatement */:
+                case 216 /* ForOfStatement */:
+                    bindForInOrForOfStatement(node);
+                    break;
+                case 211 /* IfStatement */:
+                    bindIfStatement(node);
+                    break;
+                case 219 /* ReturnStatement */:
+                case 223 /* ThrowStatement */:
+                    bindReturnOrThrow(node);
+                    break;
+                case 218 /* BreakStatement */:
+                case 217 /* ContinueStatement */:
+                    bindBreakOrContinueStatement(node);
+                    break;
+                case 224 /* TryStatement */:
+                    bindTryStatement(node);
+                    break;
+                case 221 /* SwitchStatement */:
+                    bindSwitchStatement(node);
+                    break;
+                case 235 /* CaseBlock */:
+                    bindCaseBlock(node);
+                    break;
+                case 257 /* CaseClause */:
+                    bindCaseClause(node);
+                    break;
+                case 222 /* LabeledStatement */:
+                    bindLabeledStatement(node);
+                    break;
+                case 192 /* PrefixUnaryExpression */:
+                    bindPrefixUnaryExpressionFlow(node);
+                    break;
+                case 193 /* PostfixUnaryExpression */:
+                    bindPostfixUnaryExpressionFlow(node);
+                    break;
+                case 194 /* BinaryExpression */:
+                    bindBinaryExpressionFlow(node);
+                    break;
+                case 188 /* DeleteExpression */:
+                    bindDeleteExpressionFlow(node);
+                    break;
+                case 195 /* ConditionalExpression */:
+                    bindConditionalExpressionFlow(node);
+                    break;
+                case 226 /* VariableDeclaration */:
+                    bindVariableDeclarationFlow(node);
+                    break;
+                case 181 /* CallExpression */:
+                    bindCallExpressionFlow(node);
+                    break;
+                case 283 /* JSDocComment */:
+                    bindJSDocComment(node);
+                    break;
+                case 291 /* JSDocTypedefTag */:
+                    bindJSDocTypedefTag(node);
+                    break;
+                default:
+                    bindEachChild(node);
                     break;
-                }
-            }
-            // Recording the trailing comma is deliberately done after the previous
-            // loop, and not just if we see a list terminator. This is because the list
-            // may have ended incorrectly, but it is still important to know if there
-            // was a trailing comma.
-            // Check if the last token was a comma.
-            if (commaStart >= 0) {
-                // Always preserve a trailing comma by marking it on the NodeArray
-                result.hasTrailingComma = true;
             }
-            result.end = getNodeEnd();
-            parsingContext = saveParsingContext;
-            return result;
         }
-        function createMissingList() {
-            return createNodeArray();
-        }
-        function parseBracketedList(kind, parseElement, open, close) {
-            if (parseExpected(open)) {
-                var result = parseDelimitedList(kind, parseElement);
-                parseExpected(close);
-                return result;
+        function isNarrowingExpression(expr) {
+            switch (expr.kind) {
+                case 71 /* Identifier */:
+                case 99 /* ThisKeyword */:
+                case 179 /* PropertyAccessExpression */:
+                    return isNarrowableReference(expr);
+                case 181 /* CallExpression */:
+                    return hasNarrowableArgument(expr);
+                case 185 /* ParenthesizedExpression */:
+                    return isNarrowingExpression(expr.expression);
+                case 194 /* BinaryExpression */:
+                    return isNarrowingBinaryExpression(expr);
+                case 192 /* PrefixUnaryExpression */:
+                    return expr.operator === 51 /* ExclamationToken */ && isNarrowingExpression(expr.operand);
             }
-            return createMissingList();
+            return false;
         }
-        // The allowReservedWords parameter controls whether reserved words are permitted after the first dot
-        function parseEntityName(allowReservedWords, diagnosticMessage) {
-            var entity = parseIdentifier(diagnosticMessage);
-            while (parseOptional(21 /* DotToken */)) {
-                var node = createNode(139 /* QualifiedName */, entity.pos); // !!!
-                node.left = entity;
-                node.right = parseRightSideOfDot(allowReservedWords);
-                entity = finishNode(node);
-            }
-            return entity;
+        function isNarrowableReference(expr) {
+            return expr.kind === 71 /* Identifier */ ||
+                expr.kind === 99 /* ThisKeyword */ ||
+                expr.kind === 97 /* SuperKeyword */ ||
+                expr.kind === 179 /* PropertyAccessExpression */ && isNarrowableReference(expr.expression);
         }
-        function parseRightSideOfDot(allowIdentifierNames) {
-            // Technically a keyword is valid here as all identifiers and keywords are identifier names.
-            // However, often we'll encounter this in error situations when the identifier or keyword
-            // is actually starting another valid construct.
-            //
-            // So, we check for the following specific case:
-            //
-            //      name.
-            //      identifierOrKeyword identifierNameOrKeyword
-            //
-            // Note: the newlines are important here.  For example, if that above code
-            // were rewritten into:
-            //
-            //      name.identifierOrKeyword
-            //      identifierNameOrKeyword
-            //
-            // Then we would consider it valid.  That's because ASI would take effect and
-            // the code would be implicitly: "name.identifierOrKeyword; identifierNameOrKeyword".
-            // In the first case though, ASI will not take effect because there is not a
-            // line terminator after the identifier or keyword.
-            if (scanner.hasPrecedingLineBreak() && ts.tokenIsIdentifierOrKeyword(token())) {
-                var matchesPattern = lookAhead(nextTokenIsIdentifierOrKeywordOnSameLine);
-                if (matchesPattern) {
-                    // Report that we need an identifier.  However, report it right after the dot,
-                    // and not on the next token.  This is because the next token might actually
-                    // be an identifier and the error would be quite confusing.
-                    return createMissingNode(69 /* Identifier */, /*reportAtCurrentPosition*/ true, ts.Diagnostics.Identifier_expected);
+        function hasNarrowableArgument(expr) {
+            if (expr.arguments) {
+                for (var _i = 0, _a = expr.arguments; _i < _a.length; _i++) {
+                    var argument = _a[_i];
+                    if (isNarrowableReference(argument)) {
+                        return true;
+                    }
                 }
             }
-            return allowIdentifierNames ? parseIdentifierName() : parseIdentifier();
-        }
-        function parseTemplateExpression() {
-            var template = createNode(189 /* TemplateExpression */);
-            template.head = parseTemplateLiteralFragment();
-            ts.Debug.assert(template.head.kind === 12 /* TemplateHead */, "Template head has wrong token kind");
-            var templateSpans = createNodeArray();
-            do {
-                templateSpans.push(parseTemplateSpan());
-            } while (ts.lastOrUndefined(templateSpans).literal.kind === 13 /* TemplateMiddle */);
-            templateSpans.end = getNodeEnd();
-            template.templateSpans = templateSpans;
-            return finishNode(template);
+            if (expr.expression.kind === 179 /* PropertyAccessExpression */ &&
+                isNarrowableReference(expr.expression.expression)) {
+                return true;
+            }
+            return false;
         }
-        function parseTemplateSpan() {
-            var span = createNode(197 /* TemplateSpan */);
-            span.expression = allowInAnd(parseExpression);
-            var literal;
-            if (token() === 16 /* CloseBraceToken */) {
-                reScanTemplateToken();
-                literal = parseTemplateLiteralFragment();
+        function isNarrowingTypeofOperands(expr1, expr2) {
+            return expr1.kind === 189 /* TypeOfExpression */ && isNarrowableOperand(expr1.expression) && expr2.kind === 9 /* StringLiteral */;
+        }
+        function isNarrowingBinaryExpression(expr) {
+            switch (expr.operatorToken.kind) {
+                case 58 /* EqualsToken */:
+                    return isNarrowableReference(expr.left);
+                case 32 /* EqualsEqualsToken */:
+                case 33 /* ExclamationEqualsToken */:
+                case 34 /* EqualsEqualsEqualsToken */:
+                case 35 /* ExclamationEqualsEqualsToken */:
+                    return isNarrowableOperand(expr.left) || isNarrowableOperand(expr.right) ||
+                        isNarrowingTypeofOperands(expr.right, expr.left) || isNarrowingTypeofOperands(expr.left, expr.right);
+                case 93 /* InstanceOfKeyword */:
+                    return isNarrowableOperand(expr.left);
+                case 26 /* CommaToken */:
+                    return isNarrowingExpression(expr.right);
             }
-            else {
-                literal = parseExpectedToken(14 /* TemplateTail */, /*reportAtCurrentPosition*/ false, ts.Diagnostics._0_expected, ts.tokenToString(16 /* CloseBraceToken */));
+            return false;
+        }
+        function isNarrowableOperand(expr) {
+            switch (expr.kind) {
+                case 185 /* ParenthesizedExpression */:
+                    return isNarrowableOperand(expr.expression);
+                case 194 /* BinaryExpression */:
+                    switch (expr.operatorToken.kind) {
+                        case 58 /* EqualsToken */:
+                            return isNarrowableOperand(expr.left);
+                        case 26 /* CommaToken */:
+                            return isNarrowableOperand(expr.right);
+                    }
             }
-            span.literal = literal;
-            return finishNode(span);
+            return isNarrowableReference(expr);
         }
-        function parseLiteralNode(internName) {
-            return parseLiteralLikeNode(token(), internName);
+        function createBranchLabel() {
+            return {
+                flags: 4 /* BranchLabel */,
+                antecedents: undefined
+            };
         }
-        function parseTemplateLiteralFragment() {
-            return parseLiteralLikeNode(token(), /*internName*/ false);
+        function createLoopLabel() {
+            return {
+                flags: 8 /* LoopLabel */,
+                antecedents: undefined
+            };
         }
-        function parseLiteralLikeNode(kind, internName) {
-            var node = createNode(kind);
-            var text = scanner.getTokenValue();
-            node.text = internName ? internIdentifier(text) : text;
-            if (scanner.hasExtendedUnicodeEscape()) {
-                node.hasExtendedUnicodeEscape = true;
+        function setFlowNodeReferenced(flow) {
+            // On first reference we set the Referenced flag, thereafter we set the Shared flag
+            flow.flags |= flow.flags & 512 /* Referenced */ ? 1024 /* Shared */ : 512 /* Referenced */;
+        }
+        function addAntecedent(label, antecedent) {
+            if (!(antecedent.flags & 1 /* Unreachable */) && !ts.contains(label.antecedents, antecedent)) {
+                (label.antecedents || (label.antecedents = [])).push(antecedent);
+                setFlowNodeReferenced(antecedent);
             }
-            if (scanner.isUnterminated()) {
-                node.isUnterminated = true;
+        }
+        function createFlowCondition(flags, antecedent, expression) {
+            if (antecedent.flags & 1 /* Unreachable */) {
+                return antecedent;
             }
-            var tokenPos = scanner.getTokenPos();
-            nextToken();
-            finishNode(node);
-            // Octal literals are not allowed in strict mode or ES5
-            // Note that theoretically the following condition would hold true literals like 009,
-            // which is not octal.But because of how the scanner separates the tokens, we would
-            // never get a token like this. Instead, we would get 00 and 9 as two separate tokens.
-            // We also do not need to check for negatives because any prefix operator would be part of a
-            // parent unary expression.
-            if (node.kind === 8 /* NumericLiteral */
-                && sourceText.charCodeAt(tokenPos) === 48 /* _0 */
-                && ts.isOctalDigit(sourceText.charCodeAt(tokenPos + 1))) {
-                node.isOctalLiteral = true;
+            if (!expression) {
+                return flags & 32 /* TrueCondition */ ? antecedent : unreachableFlow;
             }
-            return node;
+            if (expression.kind === 101 /* TrueKeyword */ && flags & 64 /* FalseCondition */ ||
+                expression.kind === 86 /* FalseKeyword */ && flags & 32 /* TrueCondition */) {
+                return unreachableFlow;
+            }
+            if (!isNarrowingExpression(expression)) {
+                return antecedent;
+            }
+            setFlowNodeReferenced(antecedent);
+            return {
+                flags: flags,
+                expression: expression,
+                antecedent: antecedent
+            };
         }
-        // TYPES
-        function parseTypeReference() {
-            var typeName = parseEntityName(/*allowReservedWords*/ false, ts.Diagnostics.Type_expected);
-            var node = createNode(155 /* TypeReference */, typeName.pos);
-            node.typeName = typeName;
-            if (!scanner.hasPrecedingLineBreak() && token() === 25 /* LessThanToken */) {
-                node.typeArguments = parseBracketedList(18 /* TypeArguments */, parseType, 25 /* LessThanToken */, 27 /* GreaterThanToken */);
+        function createFlowSwitchClause(antecedent, switchStatement, clauseStart, clauseEnd) {
+            if (!isNarrowingExpression(switchStatement.expression)) {
+                return antecedent;
             }
-            return finishNode(node);
+            setFlowNodeReferenced(antecedent);
+            return {
+                flags: 128 /* SwitchClause */,
+                switchStatement: switchStatement,
+                clauseStart: clauseStart,
+                clauseEnd: clauseEnd,
+                antecedent: antecedent
+            };
         }
-        function parseThisTypePredicate(lhs) {
-            nextToken();
-            var node = createNode(154 /* TypePredicate */, lhs.pos);
-            node.parameterName = lhs;
-            node.type = parseType();
-            return finishNode(node);
+        function createFlowAssignment(antecedent, node) {
+            setFlowNodeReferenced(antecedent);
+            return {
+                flags: 16 /* Assignment */,
+                antecedent: antecedent,
+                node: node
+            };
         }
-        function parseThisTypeNode() {
-            var node = createNode(165 /* ThisType */);
-            nextToken();
-            return finishNode(node);
+        function createFlowArrayMutation(antecedent, node) {
+            setFlowNodeReferenced(antecedent);
+            return {
+                flags: 256 /* ArrayMutation */,
+                antecedent: antecedent,
+                node: node
+            };
         }
-        function parseTypeQuery() {
-            var node = createNode(158 /* TypeQuery */);
-            parseExpected(101 /* TypeOfKeyword */);
-            node.exprName = parseEntityName(/*allowReservedWords*/ true);
-            return finishNode(node);
+        function finishFlowLabel(flow) {
+            var antecedents = flow.antecedents;
+            if (!antecedents) {
+                return unreachableFlow;
+            }
+            if (antecedents.length === 1) {
+                return antecedents[0];
+            }
+            return flow;
         }
-        function parseTypeParameter() {
-            var node = createNode(141 /* TypeParameter */);
-            node.name = parseIdentifier();
-            if (parseOptional(83 /* ExtendsKeyword */)) {
-                // It's not uncommon for people to write improper constraints to a generic.  If the
-                // user writes a constraint that is an expression and not an actual type, then parse
-                // it out as an expression (so we can recover well), but report that a type is needed
-                // instead.
-                if (isStartOfType() || !isStartOfExpression()) {
-                    node.constraint = parseType();
+        function isStatementCondition(node) {
+            var parent = node.parent;
+            switch (parent.kind) {
+                case 211 /* IfStatement */:
+                case 213 /* WhileStatement */:
+                case 212 /* DoStatement */:
+                    return parent.expression === node;
+                case 214 /* ForStatement */:
+                case 195 /* ConditionalExpression */:
+                    return parent.condition === node;
+            }
+            return false;
+        }
+        function isLogicalExpression(node) {
+            while (true) {
+                if (node.kind === 185 /* ParenthesizedExpression */) {
+                    node = node.expression;
+                }
+                else if (node.kind === 192 /* PrefixUnaryExpression */ && node.operator === 51 /* ExclamationToken */) {
+                    node = node.operand;
                 }
                 else {
-                    // It was not a type, and it looked like an expression.  Parse out an expression
-                    // here so we recover well.  Note: it is important that we call parseUnaryExpression
-                    // and not parseExpression here.  If the user has:
-                    //
-                    //      <T extends "">
-                    //
-                    // We do *not* want to consume the  >  as we're consuming the expression for "".
-                    node.expression = parseUnaryExpressionOrHigher();
+                    return node.kind === 194 /* BinaryExpression */ && (node.operatorToken.kind === 53 /* AmpersandAmpersandToken */ ||
+                        node.operatorToken.kind === 54 /* BarBarToken */);
                 }
             }
-            return finishNode(node);
         }
-        function parseTypeParameters() {
-            if (token() === 25 /* LessThanToken */) {
-                return parseBracketedList(17 /* TypeParameters */, parseTypeParameter, 25 /* LessThanToken */, 27 /* GreaterThanToken */);
+        function isTopLevelLogicalExpression(node) {
+            while (node.parent.kind === 185 /* ParenthesizedExpression */ ||
+                node.parent.kind === 192 /* PrefixUnaryExpression */ &&
+                    node.parent.operator === 51 /* ExclamationToken */) {
+                node = node.parent;
             }
+            return !isStatementCondition(node) && !isLogicalExpression(node.parent);
         }
-        function parseParameterType() {
-            if (parseOptional(54 /* ColonToken */)) {
-                return parseType();
+        function bindCondition(node, trueTarget, falseTarget) {
+            var saveTrueTarget = currentTrueTarget;
+            var saveFalseTarget = currentFalseTarget;
+            currentTrueTarget = trueTarget;
+            currentFalseTarget = falseTarget;
+            bind(node);
+            currentTrueTarget = saveTrueTarget;
+            currentFalseTarget = saveFalseTarget;
+            if (!node || !isLogicalExpression(node)) {
+                addAntecedent(trueTarget, createFlowCondition(32 /* TrueCondition */, currentFlow, node));
+                addAntecedent(falseTarget, createFlowCondition(64 /* FalseCondition */, currentFlow, node));
             }
-            return undefined;
         }
-        function isStartOfParameter() {
-            return token() === 22 /* DotDotDotToken */ || isIdentifierOrPattern() || ts.isModifierKind(token()) || token() === 55 /* AtToken */ || token() === 97 /* ThisKeyword */;
+        function bindIterativeStatement(node, breakTarget, continueTarget) {
+            var saveBreakTarget = currentBreakTarget;
+            var saveContinueTarget = currentContinueTarget;
+            currentBreakTarget = breakTarget;
+            currentContinueTarget = continueTarget;
+            bind(node);
+            currentBreakTarget = saveBreakTarget;
+            currentContinueTarget = saveContinueTarget;
         }
-        function parseParameter() {
-            var node = createNode(142 /* Parameter */);
-            if (token() === 97 /* ThisKeyword */) {
-                node.name = createIdentifier(/*isIdentifier*/ true, undefined);
-                node.type = parseParameterType();
-                return finishNode(node);
-            }
-            node.decorators = parseDecorators();
-            node.modifiers = parseModifiers();
-            node.dotDotDotToken = parseOptionalToken(22 /* DotDotDotToken */);
-            // FormalParameter [Yield,Await]:
-            //      BindingElement[?Yield,?Await]
-            node.name = parseIdentifierOrPattern();
-            if (ts.getFullWidth(node.name) === 0 && !ts.hasModifiers(node) && ts.isModifierKind(token())) {
-                // in cases like
-                // 'use strict'
-                // function foo(static)
-                // isParameter('static') === true, because of isModifier('static')
-                // however 'static' is not a legal identifier in a strict mode.
-                // so result of this function will be ParameterDeclaration (flags = 0, name = missing, type = undefined, initializer = undefined)
-                // and current token will not change => parsing of the enclosing parameter list will last till the end of time (or OOM)
-                // to avoid this we'll advance cursor to the next token.
-                nextToken();
-            }
-            node.questionToken = parseOptionalToken(53 /* QuestionToken */);
-            node.type = parseParameterType();
-            node.initializer = parseBindingElementInitializer(/*inParameter*/ true);
-            // Do not check for initializers in an ambient context for parameters. This is not
-            // a grammar error because the grammar allows arbitrary call signatures in
-            // an ambient context.
-            // It is actually not necessary for this to be an error at all. The reason is that
-            // function/constructor implementations are syntactically disallowed in ambient
-            // contexts. In addition, parameter initializers are semantically disallowed in
-            // overload signatures. So parameter initializers are transitively disallowed in
-            // ambient contexts.
-            return addJSDocComment(finishNode(node));
+        function bindWhileStatement(node) {
+            var preWhileLabel = createLoopLabel();
+            var preBodyLabel = createBranchLabel();
+            var postWhileLabel = createBranchLabel();
+            addAntecedent(preWhileLabel, currentFlow);
+            currentFlow = preWhileLabel;
+            bindCondition(node.expression, preBodyLabel, postWhileLabel);
+            currentFlow = finishFlowLabel(preBodyLabel);
+            bindIterativeStatement(node.statement, postWhileLabel, preWhileLabel);
+            addAntecedent(preWhileLabel, currentFlow);
+            currentFlow = finishFlowLabel(postWhileLabel);
         }
-        function parseBindingElementInitializer(inParameter) {
-            return inParameter ? parseParameterInitializer() : parseNonParameterInitializer();
+        function bindDoStatement(node) {
+            var preDoLabel = createLoopLabel();
+            var enclosingLabeledStatement = node.parent.kind === 222 /* LabeledStatement */
+                ? ts.lastOrUndefined(activeLabels)
+                : undefined;
+            // if do statement is wrapped in labeled statement then target labels for break/continue with or without
+            // label should be the same
+            var preConditionLabel = enclosingLabeledStatement ? enclosingLabeledStatement.continueTarget : createBranchLabel();
+            var postDoLabel = enclosingLabeledStatement ? enclosingLabeledStatement.breakTarget : createBranchLabel();
+            addAntecedent(preDoLabel, currentFlow);
+            currentFlow = preDoLabel;
+            bindIterativeStatement(node.statement, postDoLabel, preConditionLabel);
+            addAntecedent(preConditionLabel, currentFlow);
+            currentFlow = finishFlowLabel(preConditionLabel);
+            bindCondition(node.expression, preDoLabel, postDoLabel);
+            currentFlow = finishFlowLabel(postDoLabel);
         }
-        function parseParameterInitializer() {
-            return parseInitializer(/*inParameter*/ true);
+        function bindForStatement(node) {
+            var preLoopLabel = createLoopLabel();
+            var preBodyLabel = createBranchLabel();
+            var postLoopLabel = createBranchLabel();
+            bind(node.initializer);
+            addAntecedent(preLoopLabel, currentFlow);
+            currentFlow = preLoopLabel;
+            bindCondition(node.condition, preBodyLabel, postLoopLabel);
+            currentFlow = finishFlowLabel(preBodyLabel);
+            bindIterativeStatement(node.statement, postLoopLabel, preLoopLabel);
+            bind(node.incrementor);
+            addAntecedent(preLoopLabel, currentFlow);
+            currentFlow = finishFlowLabel(postLoopLabel);
         }
-        function fillSignature(returnToken, yieldContext, awaitContext, requireCompleteParameterList, signature) {
-            var returnTokenRequired = returnToken === 34 /* EqualsGreaterThanToken */;
-            signature.typeParameters = parseTypeParameters();
-            signature.parameters = parseParameterList(yieldContext, awaitContext, requireCompleteParameterList);
-            if (returnTokenRequired) {
-                parseExpected(returnToken);
-                signature.type = parseTypeOrTypePredicate();
+        function bindForInOrForOfStatement(node) {
+            var preLoopLabel = createLoopLabel();
+            var postLoopLabel = createBranchLabel();
+            addAntecedent(preLoopLabel, currentFlow);
+            currentFlow = preLoopLabel;
+            if (node.kind === 216 /* ForOfStatement */) {
+                bind(node.awaitModifier);
             }
-            else if (parseOptional(returnToken)) {
-                signature.type = parseTypeOrTypePredicate();
+            bind(node.expression);
+            addAntecedent(postLoopLabel, currentFlow);
+            bind(node.initializer);
+            if (node.initializer.kind !== 227 /* VariableDeclarationList */) {
+                bindAssignmentTargetFlow(node.initializer);
             }
+            bindIterativeStatement(node.statement, postLoopLabel, preLoopLabel);
+            addAntecedent(preLoopLabel, currentFlow);
+            currentFlow = finishFlowLabel(postLoopLabel);
         }
-        function parseParameterList(yieldContext, awaitContext, requireCompleteParameterList) {
-            // FormalParameters [Yield,Await]: (modified)
-            //      [empty]
-            //      FormalParameterList[?Yield,Await]
-            //
-            // FormalParameter[Yield,Await]: (modified)
-            //      BindingElement[?Yield,Await]
-            //
-            // BindingElement [Yield,Await]: (modified)
-            //      SingleNameBinding[?Yield,?Await]
-            //      BindingPattern[?Yield,?Await]Initializer [In, ?Yield,?Await] opt
-            //
-            // SingleNameBinding [Yield,Await]:
-            //      BindingIdentifier[?Yield,?Await]Initializer [In, ?Yield,?Await] opt
-            if (parseExpected(17 /* OpenParenToken */)) {
-                var savedYieldContext = inYieldContext();
-                var savedAwaitContext = inAwaitContext();
-                setYieldContext(yieldContext);
-                setAwaitContext(awaitContext);
-                var result = parseDelimitedList(16 /* Parameters */, parseParameter);
-                setYieldContext(savedYieldContext);
-                setAwaitContext(savedAwaitContext);
-                if (!parseExpected(18 /* CloseParenToken */) && requireCompleteParameterList) {
-                    // Caller insisted that we had to end with a )   We didn't.  So just return
-                    // undefined here.
-                    return undefined;
+        function bindIfStatement(node) {
+            var thenLabel = createBranchLabel();
+            var elseLabel = createBranchLabel();
+            var postIfLabel = createBranchLabel();
+            bindCondition(node.expression, thenLabel, elseLabel);
+            currentFlow = finishFlowLabel(thenLabel);
+            bind(node.thenStatement);
+            addAntecedent(postIfLabel, currentFlow);
+            currentFlow = finishFlowLabel(elseLabel);
+            bind(node.elseStatement);
+            addAntecedent(postIfLabel, currentFlow);
+            currentFlow = finishFlowLabel(postIfLabel);
+        }
+        function bindReturnOrThrow(node) {
+            bind(node.expression);
+            if (node.kind === 219 /* ReturnStatement */) {
+                hasExplicitReturn = true;
+                if (currentReturnTarget) {
+                    addAntecedent(currentReturnTarget, currentFlow);
                 }
-                return result;
             }
-            // We didn't even have an open paren.  If the caller requires a complete parameter list,
-            // we definitely can't provide that.  However, if they're ok with an incomplete one,
-            // then just return an empty set of parameters.
-            return requireCompleteParameterList ? undefined : createMissingList();
+            currentFlow = unreachableFlow;
         }
-        function parseTypeMemberSemicolon() {
-            // We allow type members to be separated by commas or (possibly ASI) semicolons.
-            // First check if it was a comma.  If so, we're done with the member.
-            if (parseOptional(24 /* CommaToken */)) {
-                return;
+        function findActiveLabel(name) {
+            if (activeLabels) {
+                for (var _i = 0, activeLabels_1 = activeLabels; _i < activeLabels_1.length; _i++) {
+                    var label = activeLabels_1[_i];
+                    if (label.name === name) {
+                        return label;
+                    }
+                }
             }
-            // Didn't have a comma.  We must have a (possible ASI) semicolon.
-            parseSemicolon();
+            return undefined;
         }
-        function parseSignatureMember(kind) {
-            var node = createNode(kind);
-            if (kind === 152 /* ConstructSignature */) {
-                parseExpected(92 /* NewKeyword */);
+        function bindBreakOrContinueFlow(node, breakTarget, continueTarget) {
+            var flowLabel = node.kind === 218 /* BreakStatement */ ? breakTarget : continueTarget;
+            if (flowLabel) {
+                addAntecedent(flowLabel, currentFlow);
+                currentFlow = unreachableFlow;
             }
-            fillSignature(54 /* ColonToken */, /*yieldContext*/ false, /*awaitContext*/ false, /*requireCompleteParameterList*/ false, node);
-            parseTypeMemberSemicolon();
-            return addJSDocComment(finishNode(node));
         }
-        function isIndexSignature() {
-            if (token() !== 19 /* OpenBracketToken */) {
-                return false;
+        function bindBreakOrContinueStatement(node) {
+            bind(node.label);
+            if (node.label) {
+                var activeLabel = findActiveLabel(node.label.text);
+                if (activeLabel) {
+                    activeLabel.referenced = true;
+                    bindBreakOrContinueFlow(node, activeLabel.breakTarget, activeLabel.continueTarget);
+                }
+            }
+            else {
+                bindBreakOrContinueFlow(node, currentBreakTarget, currentContinueTarget);
             }
-            return lookAhead(isUnambiguouslyIndexSignature);
         }
-        function isUnambiguouslyIndexSignature() {
-            // The only allowed sequence is:
-            //
-            //   [id:
-            //
-            // However, for error recovery, we also check the following cases:
-            //
-            //   [...
-            //   [id,
-            //   [id?,
-            //   [id?:
-            //   [id?]
-            //   [public id
-            //   [private id
-            //   [protected id
-            //   []
-            //
-            nextToken();
-            if (token() === 22 /* DotDotDotToken */ || token() === 20 /* CloseBracketToken */) {
-                return true;
+        function bindTryStatement(node) {
+            var preFinallyLabel = createBranchLabel();
+            var preTryFlow = currentFlow;
+            // TODO: Every statement in try block is potentially an exit point!
+            bind(node.tryBlock);
+            addAntecedent(preFinallyLabel, currentFlow);
+            var flowAfterTry = currentFlow;
+            var flowAfterCatch = unreachableFlow;
+            if (node.catchClause) {
+                currentFlow = preTryFlow;
+                bind(node.catchClause);
+                addAntecedent(preFinallyLabel, currentFlow);
+                flowAfterCatch = currentFlow;
             }
-            if (ts.isModifierKind(token())) {
-                nextToken();
-                if (isIdentifier()) {
-                    return true;
+            if (node.finallyBlock) {
+                // in finally flow is combined from pre-try/flow from try/flow from catch
+                // pre-flow is necessary to make sure that finally is reachable even if finally flows in both try and finally blocks are unreachable
+                // also for finally blocks we inject two extra edges into the flow graph.
+                // first -> edge that connects pre-try flow with the label at the beginning of the finally block, it has lock associated with it
+                // second -> edge that represents post-finally flow.
+                // these edges are used in following scenario:
+                // let a; (1)
+                // try { a = someOperation(); (2)}
+                // finally { (3) console.log(a) } (4)
+                // (5) a
+                // flow graph for this case looks roughly like this (arrows show ):
+                // (1-pre-try-flow) <--.. <-- (2-post-try-flow)
+                //  ^                                ^
+                //  |*****(3-pre-finally-label) -----|
+                //                ^
+                //                |-- ... <-- (4-post-finally-label) <--- (5)
+                // In case when we walk the flow starting from inside the finally block we want to take edge '*****' into account
+                // since it ensures that finally is always reachable. However when we start outside the finally block and go through label (5)
+                // then edge '*****' should be discarded because label 4 is only reachable if post-finally label-4 is reachable
+                // Simply speaking code inside finally block is treated as reachable as pre-try-flow
+                // since we conservatively assume that any line in try block can throw or return in which case we'll enter finally.
+                // However code after finally is reachable only if control flow was not abrupted in try/catch or finally blocks - it should be composed from
+                // final flows of these blocks without taking pre-try flow into account.
+                //
+                // extra edges that we inject allows to control this behavior
+                // if when walking the flow we step on post-finally edge - we can mark matching pre-finally edge as locked so it will be skipped.
+                var preFinallyFlow = { flags: 2048 /* PreFinally */, antecedent: preTryFlow, lock: {} };
+                addAntecedent(preFinallyLabel, preFinallyFlow);
+                currentFlow = finishFlowLabel(preFinallyLabel);
+                bind(node.finallyBlock);
+                // if flow after finally is unreachable - keep it
+                // otherwise check if flows after try and after catch are unreachable
+                // if yes - convert current flow to unreachable
+                // i.e.
+                // try { return "1" } finally { console.log(1); }
+                // console.log(2); // this line should be unreachable even if flow falls out of finally block
+                if (!(currentFlow.flags & 1 /* Unreachable */)) {
+                    if ((flowAfterTry.flags & 1 /* Unreachable */) && (flowAfterCatch.flags & 1 /* Unreachable */)) {
+                        currentFlow = flowAfterTry === reportedUnreachableFlow || flowAfterCatch === reportedUnreachableFlow
+                            ? reportedUnreachableFlow
+                            : unreachableFlow;
+                    }
+                }
+                if (!(currentFlow.flags & 1 /* Unreachable */)) {
+                    var afterFinallyFlow = { flags: 4096 /* AfterFinally */, antecedent: currentFlow };
+                    preFinallyFlow.lock = afterFinallyFlow;
+                    currentFlow = afterFinallyFlow;
                 }
-            }
-            else if (!isIdentifier()) {
-                return false;
             }
             else {
-                // Skip the identifier
-                nextToken();
-            }
-            // A colon signifies a well formed indexer
-            // A comma should be a badly formed indexer because comma expressions are not allowed
-            // in computed properties.
-            if (token() === 54 /* ColonToken */ || token() === 24 /* CommaToken */) {
-                return true;
-            }
-            // Question mark could be an indexer with an optional property,
-            // or it could be a conditional expression in a computed property.
-            if (token() !== 53 /* QuestionToken */) {
-                return false;
+                currentFlow = finishFlowLabel(preFinallyLabel);
             }
-            // If any of the following tokens are after the question mark, it cannot
-            // be a conditional expression, so treat it as an indexer.
-            nextToken();
-            return token() === 54 /* ColonToken */ || token() === 24 /* CommaToken */ || token() === 20 /* CloseBracketToken */;
         }
-        function parseIndexSignatureDeclaration(fullStart, decorators, modifiers) {
-            var node = createNode(153 /* IndexSignature */, fullStart);
-            node.decorators = decorators;
-            node.modifiers = modifiers;
-            node.parameters = parseBracketedList(16 /* Parameters */, parseParameter, 19 /* OpenBracketToken */, 20 /* CloseBracketToken */);
-            node.type = parseTypeAnnotation();
-            parseTypeMemberSemicolon();
-            return finishNode(node);
-        }
-        function parsePropertyOrMethodSignature(fullStart, modifiers) {
-            var name = parsePropertyName();
-            var questionToken = parseOptionalToken(53 /* QuestionToken */);
-            if (token() === 17 /* OpenParenToken */ || token() === 25 /* LessThanToken */) {
-                var method = createNode(146 /* MethodSignature */, fullStart);
-                method.modifiers = modifiers;
-                method.name = name;
-                method.questionToken = questionToken;
-                // Method signatures don't exist in expression contexts.  So they have neither
-                // [Yield] nor [Await]
-                fillSignature(54 /* ColonToken */, /*yieldContext*/ false, /*awaitContext*/ false, /*requireCompleteParameterList*/ false, method);
-                parseTypeMemberSemicolon();
-                return addJSDocComment(finishNode(method));
+        function bindSwitchStatement(node) {
+            var postSwitchLabel = createBranchLabel();
+            bind(node.expression);
+            var saveBreakTarget = currentBreakTarget;
+            var savePreSwitchCaseFlow = preSwitchCaseFlow;
+            currentBreakTarget = postSwitchLabel;
+            preSwitchCaseFlow = currentFlow;
+            bind(node.caseBlock);
+            addAntecedent(postSwitchLabel, currentFlow);
+            var hasDefault = ts.forEach(node.caseBlock.clauses, function (c) { return c.kind === 258 /* DefaultClause */; });
+            // We mark a switch statement as possibly exhaustive if it has no default clause and if all
+            // case clauses have unreachable end points (e.g. they all return).
+            node.possiblyExhaustive = !hasDefault && !postSwitchLabel.antecedents;
+            if (!hasDefault) {
+                addAntecedent(postSwitchLabel, createFlowSwitchClause(preSwitchCaseFlow, node, 0, 0));
             }
-            else {
-                var property = createNode(144 /* PropertySignature */, fullStart);
-                property.modifiers = modifiers;
-                property.name = name;
-                property.questionToken = questionToken;
-                property.type = parseTypeAnnotation();
-                if (token() === 56 /* EqualsToken */) {
-                    // Although type literal properties cannot not have initializers, we attempt
-                    // to parse an initializer so we can report in the checker that an interface
-                    // property or type literal property cannot have an initializer.
-                    property.initializer = parseNonParameterInitializer();
+            currentBreakTarget = saveBreakTarget;
+            preSwitchCaseFlow = savePreSwitchCaseFlow;
+            currentFlow = finishFlowLabel(postSwitchLabel);
+        }
+        function bindCaseBlock(node) {
+            var savedSubtreeTransformFlags = subtreeTransformFlags;
+            subtreeTransformFlags = 0;
+            var clauses = node.clauses;
+            var fallthroughFlow = unreachableFlow;
+            for (var i = 0; i < clauses.length; i++) {
+                var clauseStart = i;
+                while (!clauses[i].statements.length && i + 1 < clauses.length) {
+                    bind(clauses[i]);
+                    i++;
+                }
+                var preCaseLabel = createBranchLabel();
+                addAntecedent(preCaseLabel, createFlowSwitchClause(preSwitchCaseFlow, node.parent, clauseStart, i + 1));
+                addAntecedent(preCaseLabel, fallthroughFlow);
+                currentFlow = finishFlowLabel(preCaseLabel);
+                var clause = clauses[i];
+                bind(clause);
+                fallthroughFlow = currentFlow;
+                if (!(currentFlow.flags & 1 /* Unreachable */) && i !== clauses.length - 1 && options.noFallthroughCasesInSwitch) {
+                    errorOnFirstToken(clause, ts.Diagnostics.Fallthrough_case_in_switch);
                 }
-                parseTypeMemberSemicolon();
-                return addJSDocComment(finishNode(property));
             }
+            clauses.transformFlags = subtreeTransformFlags | 536870912 /* HasComputedFlags */;
+            subtreeTransformFlags |= savedSubtreeTransformFlags;
         }
-        function isTypeMemberStart() {
-            var idToken;
-            // Return true if we have the start of a signature member
-            if (token() === 17 /* OpenParenToken */ || token() === 25 /* LessThanToken */) {
-                return true;
-            }
-            // Eat up all modifiers, but hold on to the last one in case it is actually an identifier
-            while (ts.isModifierKind(token())) {
-                idToken = token();
-                nextToken();
-            }
-            // Index signatures and computed property names are type members
-            if (token() === 19 /* OpenBracketToken */) {
-                return true;
-            }
-            // Try to get the first property-like token following all modifiers
-            if (isLiteralPropertyName()) {
-                idToken = token();
-                nextToken();
-            }
-            // If we were able to get any potential identifier, check that it is
-            // the start of a member declaration
-            if (idToken) {
-                return token() === 17 /* OpenParenToken */ ||
-                    token() === 25 /* LessThanToken */ ||
-                    token() === 53 /* QuestionToken */ ||
-                    token() === 54 /* ColonToken */ ||
-                    token() === 24 /* CommaToken */ ||
-                    canParseSemicolon();
-            }
-            return false;
+        function bindCaseClause(node) {
+            var saveCurrentFlow = currentFlow;
+            currentFlow = preSwitchCaseFlow;
+            bind(node.expression);
+            currentFlow = saveCurrentFlow;
+            bindEach(node.statements);
+        }
+        function pushActiveLabel(name, breakTarget, continueTarget) {
+            var activeLabel = {
+                name: name,
+                breakTarget: breakTarget,
+                continueTarget: continueTarget,
+                referenced: false
+            };
+            (activeLabels || (activeLabels = [])).push(activeLabel);
+            return activeLabel;
+        }
+        function popActiveLabel() {
+            activeLabels.pop();
         }
-        function parseTypeMember() {
-            if (token() === 17 /* OpenParenToken */ || token() === 25 /* LessThanToken */) {
-                return parseSignatureMember(151 /* CallSignature */);
-            }
-            if (token() === 92 /* NewKeyword */ && lookAhead(isStartOfConstructSignature)) {
-                return parseSignatureMember(152 /* ConstructSignature */);
+        function bindLabeledStatement(node) {
+            var preStatementLabel = createLoopLabel();
+            var postStatementLabel = createBranchLabel();
+            bind(node.label);
+            addAntecedent(preStatementLabel, currentFlow);
+            var activeLabel = pushActiveLabel(node.label.text, postStatementLabel, preStatementLabel);
+            bind(node.statement);
+            popActiveLabel();
+            if (!activeLabel.referenced && !options.allowUnusedLabels) {
+                file.bindDiagnostics.push(ts.createDiagnosticForNode(node.label, ts.Diagnostics.Unused_label));
             }
-            var fullStart = getNodePos();
-            var modifiers = parseModifiers();
-            if (isIndexSignature()) {
-                return parseIndexSignatureDeclaration(fullStart, /*decorators*/ undefined, modifiers);
+            if (!node.statement || node.statement.kind !== 212 /* DoStatement */) {
+                // do statement sets current flow inside bindDoStatement
+                addAntecedent(postStatementLabel, currentFlow);
+                currentFlow = finishFlowLabel(postStatementLabel);
             }
-            return parsePropertyOrMethodSignature(fullStart, modifiers);
-        }
-        function isStartOfConstructSignature() {
-            nextToken();
-            return token() === 17 /* OpenParenToken */ || token() === 25 /* LessThanToken */;
-        }
-        function parseTypeLiteral() {
-            var node = createNode(159 /* TypeLiteral */);
-            node.members = parseObjectTypeMembers();
-            return finishNode(node);
         }
-        function parseObjectTypeMembers() {
-            var members;
-            if (parseExpected(15 /* OpenBraceToken */)) {
-                members = parseList(4 /* TypeMembers */, parseTypeMember);
-                parseExpected(16 /* CloseBraceToken */);
+        function bindDestructuringTargetFlow(node) {
+            if (node.kind === 194 /* BinaryExpression */ && node.operatorToken.kind === 58 /* EqualsToken */) {
+                bindAssignmentTargetFlow(node.left);
             }
             else {
-                members = createMissingList();
+                bindAssignmentTargetFlow(node);
             }
-            return members;
         }
-        function parseTupleType() {
-            var node = createNode(161 /* TupleType */);
-            node.elementTypes = parseBracketedList(19 /* TupleElementTypes */, parseType, 19 /* OpenBracketToken */, 20 /* CloseBracketToken */);
-            return finishNode(node);
-        }
-        function parseParenthesizedType() {
-            var node = createNode(164 /* ParenthesizedType */);
-            parseExpected(17 /* OpenParenToken */);
-            node.type = parseType();
-            parseExpected(18 /* CloseParenToken */);
-            return finishNode(node);
-        }
-        function parseFunctionOrConstructorType(kind) {
-            var node = createNode(kind);
-            if (kind === 157 /* ConstructorType */) {
-                parseExpected(92 /* NewKeyword */);
+        function bindAssignmentTargetFlow(node) {
+            if (isNarrowableReference(node)) {
+                currentFlow = createFlowAssignment(currentFlow, node);
             }
-            fillSignature(34 /* EqualsGreaterThanToken */, /*yieldContext*/ false, /*awaitContext*/ false, /*requireCompleteParameterList*/ false, node);
-            return finishNode(node);
-        }
-        function parseKeywordAndNoDot() {
-            var node = parseTokenNode();
-            return token() === 21 /* DotToken */ ? undefined : node;
-        }
-        function parseLiteralTypeNode() {
-            var node = createNode(166 /* LiteralType */);
-            node.literal = parseSimpleUnaryExpression();
-            finishNode(node);
-            return node;
-        }
-        function nextTokenIsNumericLiteral() {
-            return nextToken() === 8 /* NumericLiteral */;
-        }
-        function parseNonArrayType() {
-            switch (token()) {
-                case 117 /* AnyKeyword */:
-                case 132 /* StringKeyword */:
-                case 130 /* NumberKeyword */:
-                case 120 /* BooleanKeyword */:
-                case 133 /* SymbolKeyword */:
-                case 135 /* UndefinedKeyword */:
-                case 127 /* NeverKeyword */:
-                    // If these are followed by a dot, then parse these out as a dotted type reference instead.
-                    var node = tryParse(parseKeywordAndNoDot);
-                    return node || parseTypeReference();
-                case 9 /* StringLiteral */:
-                case 8 /* NumericLiteral */:
-                case 99 /* TrueKeyword */:
-                case 84 /* FalseKeyword */:
-                    return parseLiteralTypeNode();
-                case 36 /* MinusToken */:
-                    return lookAhead(nextTokenIsNumericLiteral) ? parseLiteralTypeNode() : parseTypeReference();
-                case 103 /* VoidKeyword */:
-                case 93 /* NullKeyword */:
-                    return parseTokenNode();
-                case 97 /* ThisKeyword */: {
-                    var thisKeyword = parseThisTypeNode();
-                    if (token() === 124 /* IsKeyword */ && !scanner.hasPrecedingLineBreak()) {
-                        return parseThisTypePredicate(thisKeyword);
+            else if (node.kind === 177 /* ArrayLiteralExpression */) {
+                for (var _i = 0, _a = node.elements; _i < _a.length; _i++) {
+                    var e = _a[_i];
+                    if (e.kind === 198 /* SpreadElement */) {
+                        bindAssignmentTargetFlow(e.expression);
                     }
                     else {
-                        return thisKeyword;
+                        bindDestructuringTargetFlow(e);
                     }
                 }
-                case 101 /* TypeOfKeyword */:
-                    return parseTypeQuery();
-                case 15 /* OpenBraceToken */:
-                    return parseTypeLiteral();
-                case 19 /* OpenBracketToken */:
-                    return parseTupleType();
-                case 17 /* OpenParenToken */:
-                    return parseParenthesizedType();
-                default:
-                    return parseTypeReference();
             }
-        }
-        function isStartOfType() {
-            switch (token()) {
-                case 117 /* AnyKeyword */:
-                case 132 /* StringKeyword */:
-                case 130 /* NumberKeyword */:
-                case 120 /* BooleanKeyword */:
-                case 133 /* SymbolKeyword */:
-                case 103 /* VoidKeyword */:
-                case 135 /* UndefinedKeyword */:
-                case 93 /* NullKeyword */:
-                case 97 /* ThisKeyword */:
-                case 101 /* TypeOfKeyword */:
-                case 127 /* NeverKeyword */:
-                case 15 /* OpenBraceToken */:
-                case 19 /* OpenBracketToken */:
-                case 25 /* LessThanToken */:
-                case 92 /* NewKeyword */:
-                case 9 /* StringLiteral */:
-                case 8 /* NumericLiteral */:
-                case 99 /* TrueKeyword */:
-                case 84 /* FalseKeyword */:
-                    return true;
-                case 36 /* MinusToken */:
-                    return lookAhead(nextTokenIsNumericLiteral);
-                case 17 /* OpenParenToken */:
-                    // Only consider '(' the start of a type if followed by ')', '...', an identifier, a modifier,
-                    // or something that starts a type. We don't want to consider things like '(1)' a type.
-                    return lookAhead(isStartOfParenthesizedOrFunctionType);
-                default:
-                    return isIdentifier();
+            else if (node.kind === 178 /* ObjectLiteralExpression */) {
+                for (var _b = 0, _c = node.properties; _b < _c.length; _b++) {
+                    var p = _c[_b];
+                    if (p.kind === 261 /* PropertyAssignment */) {
+                        bindDestructuringTargetFlow(p.initializer);
+                    }
+                    else if (p.kind === 262 /* ShorthandPropertyAssignment */) {
+                        bindAssignmentTargetFlow(p.name);
+                    }
+                    else if (p.kind === 263 /* SpreadAssignment */) {
+                        bindAssignmentTargetFlow(p.expression);
+                    }
+                }
             }
         }
-        function isStartOfParenthesizedOrFunctionType() {
-            nextToken();
-            return token() === 18 /* CloseParenToken */ || isStartOfParameter() || isStartOfType();
-        }
-        function parseArrayTypeOrHigher() {
-            var type = parseNonArrayType();
-            while (!scanner.hasPrecedingLineBreak() && parseOptional(19 /* OpenBracketToken */)) {
-                parseExpected(20 /* CloseBracketToken */);
-                var node = createNode(160 /* ArrayType */, type.pos);
-                node.elementType = type;
-                type = finishNode(node);
+        function bindLogicalExpression(node, trueTarget, falseTarget) {
+            var preRightLabel = createBranchLabel();
+            if (node.operatorToken.kind === 53 /* AmpersandAmpersandToken */) {
+                bindCondition(node.left, preRightLabel, falseTarget);
             }
-            return type;
+            else {
+                bindCondition(node.left, trueTarget, preRightLabel);
+            }
+            currentFlow = finishFlowLabel(preRightLabel);
+            bind(node.operatorToken);
+            bindCondition(node.right, trueTarget, falseTarget);
         }
-        function parseUnionOrIntersectionType(kind, parseConstituentType, operator) {
-            var type = parseConstituentType();
-            if (token() === operator) {
-                var types = createNodeArray([type], type.pos);
-                while (parseOptional(operator)) {
-                    types.push(parseConstituentType());
+        function bindPrefixUnaryExpressionFlow(node) {
+            if (node.operator === 51 /* ExclamationToken */) {
+                var saveTrueTarget = currentTrueTarget;
+                currentTrueTarget = currentFalseTarget;
+                currentFalseTarget = saveTrueTarget;
+                bindEachChild(node);
+                currentFalseTarget = currentTrueTarget;
+                currentTrueTarget = saveTrueTarget;
+            }
+            else {
+                bindEachChild(node);
+                if (node.operator === 43 /* PlusPlusToken */ || node.operator === 44 /* MinusMinusToken */) {
+                    bindAssignmentTargetFlow(node.operand);
                 }
-                types.end = getNodeEnd();
-                var node = createNode(kind, type.pos);
-                node.types = types;
-                type = finishNode(node);
             }
-            return type;
-        }
-        function parseIntersectionTypeOrHigher() {
-            return parseUnionOrIntersectionType(163 /* IntersectionType */, parseArrayTypeOrHigher, 46 /* AmpersandToken */);
         }
-        function parseUnionTypeOrHigher() {
-            return parseUnionOrIntersectionType(162 /* UnionType */, parseIntersectionTypeOrHigher, 47 /* BarToken */);
+        function bindPostfixUnaryExpressionFlow(node) {
+            bindEachChild(node);
+            if (node.operator === 43 /* PlusPlusToken */ || node.operator === 44 /* MinusMinusToken */) {
+                bindAssignmentTargetFlow(node.operand);
+            }
         }
-        function isStartOfFunctionType() {
-            if (token() === 25 /* LessThanToken */) {
-                return true;
+        function bindBinaryExpressionFlow(node) {
+            var operator = node.operatorToken.kind;
+            if (operator === 53 /* AmpersandAmpersandToken */ || operator === 54 /* BarBarToken */) {
+                if (isTopLevelLogicalExpression(node)) {
+                    var postExpressionLabel = createBranchLabel();
+                    bindLogicalExpression(node, postExpressionLabel, postExpressionLabel);
+                    currentFlow = finishFlowLabel(postExpressionLabel);
+                }
+                else {
+                    bindLogicalExpression(node, currentTrueTarget, currentFalseTarget);
+                }
+            }
+            else {
+                bindEachChild(node);
+                if (ts.isAssignmentOperator(operator) && !ts.isAssignmentTarget(node)) {
+                    bindAssignmentTargetFlow(node.left);
+                    if (operator === 58 /* EqualsToken */ && node.left.kind === 180 /* ElementAccessExpression */) {
+                        var elementAccess = node.left;
+                        if (isNarrowableOperand(elementAccess.expression)) {
+                            currentFlow = createFlowArrayMutation(currentFlow, node);
+                        }
+                    }
+                }
             }
-            return token() === 17 /* OpenParenToken */ && lookAhead(isUnambiguouslyStartOfFunctionType);
         }
-        function skipParameterStart() {
-            if (ts.isModifierKind(token())) {
-                // Skip modifiers
-                parseModifiers();
+        function bindDeleteExpressionFlow(node) {
+            bindEachChild(node);
+            if (node.expression.kind === 179 /* PropertyAccessExpression */) {
+                bindAssignmentTargetFlow(node.expression);
             }
-            if (isIdentifier() || token() === 97 /* ThisKeyword */) {
-                nextToken();
-                return true;
+        }
+        function bindConditionalExpressionFlow(node) {
+            var trueLabel = createBranchLabel();
+            var falseLabel = createBranchLabel();
+            var postExpressionLabel = createBranchLabel();
+            bindCondition(node.condition, trueLabel, falseLabel);
+            currentFlow = finishFlowLabel(trueLabel);
+            bind(node.questionToken);
+            bind(node.whenTrue);
+            addAntecedent(postExpressionLabel, currentFlow);
+            currentFlow = finishFlowLabel(falseLabel);
+            bind(node.colonToken);
+            bind(node.whenFalse);
+            addAntecedent(postExpressionLabel, currentFlow);
+            currentFlow = finishFlowLabel(postExpressionLabel);
+        }
+        function bindInitializedVariableFlow(node) {
+            var name = !ts.isOmittedExpression(node) ? node.name : undefined;
+            if (ts.isBindingPattern(name)) {
+                for (var _i = 0, _a = name.elements; _i < _a.length; _i++) {
+                    var child = _a[_i];
+                    bindInitializedVariableFlow(child);
+                }
             }
-            if (token() === 19 /* OpenBracketToken */ || token() === 15 /* OpenBraceToken */) {
-                // Return true if we can parse an array or object binding pattern with no errors
-                var previousErrorCount = parseDiagnostics.length;
-                parseIdentifierOrPattern();
-                return previousErrorCount === parseDiagnostics.length;
+            else {
+                currentFlow = createFlowAssignment(currentFlow, node);
             }
-            return false;
         }
-        function isUnambiguouslyStartOfFunctionType() {
-            nextToken();
-            if (token() === 18 /* CloseParenToken */ || token() === 22 /* DotDotDotToken */) {
-                // ( )
-                // ( ...
-                return true;
+        function bindVariableDeclarationFlow(node) {
+            bindEachChild(node);
+            if (node.initializer || ts.isForInOrOfStatement(node.parent.parent)) {
+                bindInitializedVariableFlow(node);
             }
-            if (skipParameterStart()) {
-                // We successfully skipped modifiers (if any) and an identifier or binding pattern,
-                // now see if we have something that indicates a parameter declaration
-                if (token() === 54 /* ColonToken */ || token() === 24 /* CommaToken */ ||
-                    token() === 53 /* QuestionToken */ || token() === 56 /* EqualsToken */) {
-                    // ( xxx :
-                    // ( xxx ,
-                    // ( xxx ?
-                    // ( xxx =
-                    return true;
+        }
+        function bindJSDocComment(node) {
+            ts.forEachChild(node, function (n) {
+                if (n.kind !== 291 /* JSDocTypedefTag */) {
+                    bind(n);
                 }
-                if (token() === 18 /* CloseParenToken */) {
-                    nextToken();
-                    if (token() === 34 /* EqualsGreaterThanToken */) {
-                        // ( xxx ) =>
-                        return true;
-                    }
+            });
+        }
+        function bindJSDocTypedefTag(node) {
+            ts.forEachChild(node, function (n) {
+                // if the node has a fullName "A.B.C", that means symbol "C" was already bound
+                // when we visit "fullName"; so when we visit the name "C" as the next child of
+                // the jsDocTypedefTag, we should skip binding it.
+                if (node.fullName && n === node.name && node.fullName.kind !== 71 /* Identifier */) {
+                    return;
                 }
-            }
-            return false;
+                bind(n);
+            });
         }
-        function parseTypeOrTypePredicate() {
-            var typePredicateVariable = isIdentifier() && tryParse(parseTypePredicatePrefix);
-            var type = parseType();
-            if (typePredicateVariable) {
-                var node = createNode(154 /* TypePredicate */, typePredicateVariable.pos);
-                node.parameterName = typePredicateVariable;
-                node.type = type;
-                return finishNode(node);
+        function bindCallExpressionFlow(node) {
+            // If the target of the call expression is a function expression or arrow function we have
+            // an immediately invoked function expression (IIFE). Initialize the flowNode property to
+            // the current control flow (which includes evaluation of the IIFE arguments).
+            var expr = node.expression;
+            while (expr.kind === 185 /* ParenthesizedExpression */) {
+                expr = expr.expression;
+            }
+            if (expr.kind === 186 /* FunctionExpression */ || expr.kind === 187 /* ArrowFunction */) {
+                bindEach(node.typeArguments);
+                bindEach(node.arguments);
+                bind(node.expression);
             }
             else {
-                return type;
+                bindEachChild(node);
             }
-        }
-        function parseTypePredicatePrefix() {
-            var id = parseIdentifier();
-            if (token() === 124 /* IsKeyword */ && !scanner.hasPrecedingLineBreak()) {
-                nextToken();
-                return id;
+            if (node.expression.kind === 179 /* PropertyAccessExpression */) {
+                var propertyAccess = node.expression;
+                if (isNarrowableOperand(propertyAccess.expression) && ts.isPushOrUnshiftIdentifier(propertyAccess.name)) {
+                    currentFlow = createFlowArrayMutation(currentFlow, node);
+                }
             }
         }
-        function parseType() {
-            // The rules about 'yield' only apply to actual code/expression contexts.  They don't
-            // apply to 'type' contexts.  So we disable these parameters here before moving on.
-            return doOutsideOfContext(327680 /* TypeExcludesFlags */, parseTypeWorker);
-        }
-        function parseTypeWorker() {
-            if (isStartOfFunctionType()) {
-                return parseFunctionOrConstructorType(156 /* FunctionType */);
+        function getContainerFlags(node) {
+            switch (node.kind) {
+                case 199 /* ClassExpression */:
+                case 229 /* ClassDeclaration */:
+                case 232 /* EnumDeclaration */:
+                case 178 /* ObjectLiteralExpression */:
+                case 163 /* TypeLiteral */:
+                case 293 /* JSDocTypeLiteral */:
+                case 275 /* JSDocRecordType */:
+                case 254 /* JsxAttributes */:
+                    return 1 /* IsContainer */;
+                case 230 /* InterfaceDeclaration */:
+                    return 1 /* IsContainer */ | 64 /* IsInterface */;
+                case 279 /* JSDocFunctionType */:
+                case 233 /* ModuleDeclaration */:
+                case 231 /* TypeAliasDeclaration */:
+                case 172 /* MappedType */:
+                    return 1 /* IsContainer */ | 32 /* HasLocals */;
+                case 265 /* SourceFile */:
+                    return 1 /* IsContainer */ | 4 /* IsControlFlowContainer */ | 32 /* HasLocals */;
+                case 151 /* MethodDeclaration */:
+                    if (ts.isObjectLiteralOrClassExpressionMethod(node)) {
+                        return 1 /* IsContainer */ | 4 /* IsControlFlowContainer */ | 32 /* HasLocals */ | 8 /* IsFunctionLike */ | 128 /* IsObjectLiteralOrClassExpressionMethod */;
+                    }
+                // falls through
+                case 152 /* Constructor */:
+                case 228 /* FunctionDeclaration */:
+                case 150 /* MethodSignature */:
+                case 153 /* GetAccessor */:
+                case 154 /* SetAccessor */:
+                case 155 /* CallSignature */:
+                case 156 /* ConstructSignature */:
+                case 157 /* IndexSignature */:
+                case 160 /* FunctionType */:
+                case 161 /* ConstructorType */:
+                    return 1 /* IsContainer */ | 4 /* IsControlFlowContainer */ | 32 /* HasLocals */ | 8 /* IsFunctionLike */;
+                case 186 /* FunctionExpression */:
+                case 187 /* ArrowFunction */:
+                    return 1 /* IsContainer */ | 4 /* IsControlFlowContainer */ | 32 /* HasLocals */ | 8 /* IsFunctionLike */ | 16 /* IsFunctionExpression */;
+                case 234 /* ModuleBlock */:
+                    return 4 /* IsControlFlowContainer */;
+                case 149 /* PropertyDeclaration */:
+                    return node.initializer ? 4 /* IsControlFlowContainer */ : 0;
+                case 260 /* CatchClause */:
+                case 214 /* ForStatement */:
+                case 215 /* ForInStatement */:
+                case 216 /* ForOfStatement */:
+                case 235 /* CaseBlock */:
+                    return 2 /* IsBlockScopedContainer */;
+                case 207 /* Block */:
+                    // do not treat blocks directly inside a function as a block-scoped-container.
+                    // Locals that reside in this block should go to the function locals. Otherwise 'x'
+                    // would not appear to be a redeclaration of a block scoped local in the following
+                    // example:
+                    //
+                    //      function foo() {
+                    //          var x;
+                    //          let x;
+                    //      }
+                    //
+                    // If we placed 'var x' into the function locals and 'let x' into the locals of
+                    // the block, then there would be no collision.
+                    //
+                    // By not creating a new block-scoped-container here, we ensure that both 'var x'
+                    // and 'let x' go into the Function-container's locals, and we do get a collision
+                    // conflict.
+                    return ts.isFunctionLike(node.parent) ? 0 /* None */ : 2 /* IsBlockScopedContainer */;
             }
-            if (token() === 92 /* NewKeyword */) {
-                return parseFunctionOrConstructorType(157 /* ConstructorType */);
+            return 0 /* None */;
+        }
+        function addToContainerChain(next) {
+            if (lastContainer) {
+                lastContainer.nextContainer = next;
             }
-            return parseUnionTypeOrHigher();
+            lastContainer = next;
         }
-        function parseTypeAnnotation() {
-            return parseOptional(54 /* ColonToken */) ? parseType() : undefined;
+        function declareSymbolAndAddToSymbolTable(node, symbolFlags, symbolExcludes) {
+            // Just call this directly so that the return type of this function stays "void".
+            return declareSymbolAndAddToSymbolTableWorker(node, symbolFlags, symbolExcludes);
         }
-        // EXPRESSIONS
-        function isStartOfLeftHandSideExpression() {
-            switch (token()) {
-                case 97 /* ThisKeyword */:
-                case 95 /* SuperKeyword */:
-                case 93 /* NullKeyword */:
-                case 99 /* TrueKeyword */:
-                case 84 /* FalseKeyword */:
-                case 8 /* NumericLiteral */:
-                case 9 /* StringLiteral */:
-                case 11 /* NoSubstitutionTemplateLiteral */:
-                case 12 /* TemplateHead */:
-                case 17 /* OpenParenToken */:
-                case 19 /* OpenBracketToken */:
-                case 15 /* OpenBraceToken */:
-                case 87 /* FunctionKeyword */:
-                case 73 /* ClassKeyword */:
-                case 92 /* NewKeyword */:
-                case 39 /* SlashToken */:
-                case 61 /* SlashEqualsToken */:
-                case 69 /* Identifier */:
-                    return true;
-                default:
-                    return isIdentifier();
+        function declareSymbolAndAddToSymbolTableWorker(node, symbolFlags, symbolExcludes) {
+            switch (container.kind) {
+                // Modules, source files, and classes need specialized handling for how their
+                // members are declared (for example, a member of a class will go into a specific
+                // symbol table depending on if it is static or not). We defer to specialized
+                // handlers to take care of declaring these child members.
+                case 233 /* ModuleDeclaration */:
+                    return declareModuleMember(node, symbolFlags, symbolExcludes);
+                case 265 /* SourceFile */:
+                    return declareSourceFileMember(node, symbolFlags, symbolExcludes);
+                case 199 /* ClassExpression */:
+                case 229 /* ClassDeclaration */:
+                    return declareClassMember(node, symbolFlags, symbolExcludes);
+                case 232 /* EnumDeclaration */:
+                    return declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
+                case 163 /* TypeLiteral */:
+                case 178 /* ObjectLiteralExpression */:
+                case 230 /* InterfaceDeclaration */:
+                case 275 /* JSDocRecordType */:
+                case 293 /* JSDocTypeLiteral */:
+                case 254 /* JsxAttributes */:
+                    // Interface/Object-types always have their children added to the 'members' of
+                    // their container. They are only accessible through an instance of their
+                    // container, and are never in scope otherwise (even inside the body of the
+                    // object / type / interface declaring them). An exception is type parameters,
+                    // which are in scope without qualification (similar to 'locals').
+                    return declareSymbol(container.symbol.members, container.symbol, node, symbolFlags, symbolExcludes);
+                case 160 /* FunctionType */:
+                case 161 /* ConstructorType */:
+                case 155 /* CallSignature */:
+                case 156 /* ConstructSignature */:
+                case 157 /* IndexSignature */:
+                case 151 /* MethodDeclaration */:
+                case 150 /* MethodSignature */:
+                case 152 /* Constructor */:
+                case 153 /* GetAccessor */:
+                case 154 /* SetAccessor */:
+                case 228 /* FunctionDeclaration */:
+                case 186 /* FunctionExpression */:
+                case 187 /* ArrowFunction */:
+                case 279 /* JSDocFunctionType */:
+                case 231 /* TypeAliasDeclaration */:
+                case 172 /* MappedType */:
+                    // All the children of these container types are never visible through another
+                    // symbol (i.e. through another symbol's 'exports' or 'members').  Instead,
+                    // they're only accessed 'lexically' (i.e. from code that exists underneath
+                    // their container in the tree). To accomplish this, we simply add their declared
+                    // symbol to the 'locals' of the container.  These symbols can then be found as
+                    // the type checker walks up the containers, checking them for matching names.
+                    return declareSymbol(container.locals, /*parent*/ undefined, node, symbolFlags, symbolExcludes);
             }
         }
-        function isStartOfExpression() {
-            if (isStartOfLeftHandSideExpression()) {
-                return true;
-            }
-            switch (token()) {
-                case 35 /* PlusToken */:
-                case 36 /* MinusToken */:
-                case 50 /* TildeToken */:
-                case 49 /* ExclamationToken */:
-                case 78 /* DeleteKeyword */:
-                case 101 /* TypeOfKeyword */:
-                case 103 /* VoidKeyword */:
-                case 41 /* PlusPlusToken */:
-                case 42 /* MinusMinusToken */:
-                case 25 /* LessThanToken */:
-                case 119 /* AwaitKeyword */:
-                case 114 /* YieldKeyword */:
-                    // Yield/await always starts an expression.  Either it is an identifier (in which case
-                    // it is definitely an expression).  Or it's a keyword (either because we're in
-                    // a generator or async function, or in strict mode (or both)) and it started a yield or await expression.
-                    return true;
-                default:
-                    // Error tolerance.  If we see the start of some binary operator, we consider
-                    // that the start of an expression.  That way we'll parse out a missing identifier,
-                    // give a good message about an identifier being missing, and then consume the
-                    // rest of the binary expression.
-                    if (isBinaryOperator()) {
+        function declareClassMember(node, symbolFlags, symbolExcludes) {
+            return ts.hasModifier(node, 32 /* Static */)
+                ? declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes)
+                : declareSymbol(container.symbol.members, container.symbol, node, symbolFlags, symbolExcludes);
+        }
+        function declareSourceFileMember(node, symbolFlags, symbolExcludes) {
+            return ts.isExternalModule(file)
+                ? declareModuleMember(node, symbolFlags, symbolExcludes)
+                : declareSymbol(file.locals, /*parent*/ undefined, node, symbolFlags, symbolExcludes);
+        }
+        function hasExportDeclarations(node) {
+            var body = node.kind === 265 /* SourceFile */ ? node : node.body;
+            if (body && (body.kind === 265 /* SourceFile */ || body.kind === 234 /* ModuleBlock */)) {
+                for (var _i = 0, _a = body.statements; _i < _a.length; _i++) {
+                    var stat = _a[_i];
+                    if (stat.kind === 244 /* ExportDeclaration */ || stat.kind === 243 /* ExportAssignment */) {
                         return true;
                     }
-                    return isIdentifier();
+                }
             }
+            return false;
         }
-        function isStartOfExpressionStatement() {
-            // As per the grammar, none of '{' or 'function' or 'class' can start an expression statement.
-            return token() !== 15 /* OpenBraceToken */ &&
-                token() !== 87 /* FunctionKeyword */ &&
-                token() !== 73 /* ClassKeyword */ &&
-                token() !== 55 /* AtToken */ &&
-                isStartOfExpression();
-        }
-        function parseExpression() {
-            // Expression[in]:
-            //      AssignmentExpression[in]
-            //      Expression[in] , AssignmentExpression[in]
-            // clear the decorator context when parsing Expression, as it should be unambiguous when parsing a decorator
-            var saveDecoratorContext = inDecoratorContext();
-            if (saveDecoratorContext) {
-                setDecoratorContext(/*val*/ false);
-            }
-            var expr = parseAssignmentExpressionOrHigher();
-            var operatorToken;
-            while ((operatorToken = parseOptionalToken(24 /* CommaToken */))) {
-                expr = makeBinaryExpression(expr, operatorToken, parseAssignmentExpressionOrHigher());
+        function setExportContextFlag(node) {
+            // A declaration source file or ambient module declaration that contains no export declarations (but possibly regular
+            // declarations with export modifiers) is an export context in which declarations are implicitly exported.
+            if (ts.isInAmbientContext(node) && !hasExportDeclarations(node)) {
+                node.flags |= 32 /* ExportContext */;
             }
-            if (saveDecoratorContext) {
-                setDecoratorContext(/*val*/ true);
+            else {
+                node.flags &= ~32 /* ExportContext */;
             }
-            return expr;
         }
-        function parseInitializer(inParameter) {
-            if (token() !== 56 /* EqualsToken */) {
-                // It's not uncommon during typing for the user to miss writing the '=' token.  Check if
-                // there is no newline after the last token and if we're on an expression.  If so, parse
-                // this as an equals-value clause with a missing equals.
-                // NOTE: There are two places where we allow equals-value clauses.  The first is in a
-                // variable declarator.  The second is with a parameter.  For variable declarators
-                // it's more likely that a { would be a allowed (as an object literal).  While this
-                // is also allowed for parameters, the risk is that we consume the { as an object
-                // literal when it really will be for the block following the parameter.
-                if (scanner.hasPrecedingLineBreak() || (inParameter && token() === 15 /* OpenBraceToken */) || !isStartOfExpression()) {
-                    // preceding line break, open brace in a parameter (likely a function body) or current token is not an expression -
-                    // do not try to parse initializer
-                    return undefined;
+        function bindModuleDeclaration(node) {
+            setExportContextFlag(node);
+            if (ts.isAmbientModule(node)) {
+                if (ts.hasModifier(node, 1 /* Export */)) {
+                    errorOnFirstToken(node, ts.Diagnostics.export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always_visible);
+                }
+                if (ts.isExternalModuleAugmentation(node)) {
+                    declareModuleSymbol(node);
+                }
+                else {
+                    var pattern = void 0;
+                    if (node.name.kind === 9 /* StringLiteral */) {
+                        var text = node.name.text;
+                        if (ts.hasZeroOrOneAsteriskCharacter(text)) {
+                            pattern = ts.tryParsePattern(text);
+                        }
+                        else {
+                            errorOnFirstToken(node.name, ts.Diagnostics.Pattern_0_can_have_at_most_one_Asterisk_character, text);
+                        }
+                    }
+                    var symbol = declareSymbolAndAddToSymbolTable(node, 512 /* ValueModule */, 106639 /* ValueModuleExcludes */);
+                    if (pattern) {
+                        (file.patternAmbientModules || (file.patternAmbientModules = [])).push({ pattern: pattern, symbol: symbol });
+                    }
                 }
             }
-            // Initializer[In, Yield] :
-            //     = AssignmentExpression[?In, ?Yield]
-            parseExpected(56 /* EqualsToken */);
-            return parseAssignmentExpressionOrHigher();
-        }
-        function parseAssignmentExpressionOrHigher() {
-            //  AssignmentExpression[in,yield]:
-            //      1) ConditionalExpression[?in,?yield]
-            //      2) LeftHandSideExpression = AssignmentExpression[?in,?yield]
-            //      3) LeftHandSideExpression AssignmentOperator AssignmentExpression[?in,?yield]
-            //      4) ArrowFunctionExpression[?in,?yield]
-            //      5) AsyncArrowFunctionExpression[in,yield,await]
-            //      6) [+Yield] YieldExpression[?In]
-            //
-            // Note: for ease of implementation we treat productions '2' and '3' as the same thing.
-            // (i.e. they're both BinaryExpressions with an assignment operator in it).
-            // First, do the simple check if we have a YieldExpression (production '6').
-            if (isYieldExpression()) {
-                return parseYieldExpression();
-            }
-            // Then, check if we have an arrow function (production '4' and '5') that starts with a parenthesized
-            // parameter list or is an async arrow function.
-            // AsyncArrowFunctionExpression:
-            //      1) async[no LineTerminator here]AsyncArrowBindingIdentifier[?Yield][no LineTerminator here]=>AsyncConciseBody[?In]
-            //      2) CoverCallExpressionAndAsyncArrowHead[?Yield, ?Await][no LineTerminator here]=>AsyncConciseBody[?In]
-            // Production (1) of AsyncArrowFunctionExpression is parsed in "tryParseAsyncSimpleArrowFunctionExpression".
-            // And production (2) is parsed in "tryParseParenthesizedArrowFunctionExpression".
-            //
-            // If we do successfully parse arrow-function, we must *not* recurse for productions 1, 2 or 3. An ArrowFunction is
-            // not a  LeftHandSideExpression, nor does it start a ConditionalExpression.  So we are done
-            // with AssignmentExpression if we see one.
-            var arrowExpression = tryParseParenthesizedArrowFunctionExpression() || tryParseAsyncSimpleArrowFunctionExpression();
-            if (arrowExpression) {
-                return arrowExpression;
+            else {
+                var state = declareModuleSymbol(node);
+                if (state !== 0 /* NonInstantiated */) {
+                    if (node.symbol.flags & (16 /* Function */ | 32 /* Class */ | 256 /* RegularEnum */)) {
+                        // if module was already merged with some function, class or non-const enum
+                        // treat is a non-const-enum-only
+                        node.symbol.constEnumOnlyModule = false;
+                    }
+                    else {
+                        var currentModuleIsConstEnumOnly = state === 2 /* ConstEnumOnly */;
+                        if (node.symbol.constEnumOnlyModule === undefined) {
+                            // non-merged case - use the current state
+                            node.symbol.constEnumOnlyModule = currentModuleIsConstEnumOnly;
+                        }
+                        else {
+                            // merged case: module is const enum only if all its pieces are non-instantiated or const enum
+                            node.symbol.constEnumOnlyModule = node.symbol.constEnumOnlyModule && currentModuleIsConstEnumOnly;
+                        }
+                    }
+                }
             }
-            // Now try to see if we're in production '1', '2' or '3'.  A conditional expression can
-            // start with a LogicalOrExpression, while the assignment productions can only start with
-            // LeftHandSideExpressions.
+        }
+        function declareModuleSymbol(node) {
+            var state = getModuleInstanceState(node);
+            var instantiated = state !== 0 /* NonInstantiated */;
+            declareSymbolAndAddToSymbolTable(node, instantiated ? 512 /* ValueModule */ : 1024 /* NamespaceModule */, instantiated ? 106639 /* ValueModuleExcludes */ : 0 /* NamespaceModuleExcludes */);
+            return state;
+        }
+        function bindFunctionOrConstructorType(node) {
+            // For a given function symbol "<...>(...) => T" we want to generate a symbol identical
+            // to the one we would get for: { <...>(...): T }
             //
-            // So, first, we try to just parse out a BinaryExpression.  If we get something that is a
-            // LeftHandSide or higher, then we can try to parse out the assignment expression part.
-            // Otherwise, we try to parse out the conditional expression bit.  We want to allow any
-            // binary expression here, so we pass in the 'lowest' precedence here so that it matches
-            // and consumes anything.
-            var expr = parseBinaryExpressionOrHigher(/*precedence*/ 0);
-            // To avoid a look-ahead, we did not handle the case of an arrow function with a single un-parenthesized
-            // parameter ('x => ...') above. We handle it here by checking if the parsed expression was a single
-            // identifier and the current token is an arrow.
-            if (expr.kind === 69 /* Identifier */ && token() === 34 /* EqualsGreaterThanToken */) {
-                return parseSimpleArrowFunctionExpression(expr);
+            // We do that by making an anonymous type literal symbol, and then setting the function
+            // symbol as its sole member. To the rest of the system, this symbol will be  indistinguishable
+            // from an actual type literal symbol you would have gotten had you used the long form.
+            var symbol = createSymbol(131072 /* Signature */, getDeclarationName(node));
+            addDeclarationToSymbol(symbol, node, 131072 /* Signature */);
+            var typeLiteralSymbol = createSymbol(2048 /* TypeLiteral */, "__type");
+            addDeclarationToSymbol(typeLiteralSymbol, node, 2048 /* TypeLiteral */);
+            typeLiteralSymbol.members = ts.createMap();
+            typeLiteralSymbol.members.set(symbol.name, symbol);
+        }
+        function bindObjectLiteralExpression(node) {
+            var ElementKind;
+            (function (ElementKind) {
+                ElementKind[ElementKind["Property"] = 1] = "Property";
+                ElementKind[ElementKind["Accessor"] = 2] = "Accessor";
+            })(ElementKind || (ElementKind = {}));
+            if (inStrictMode) {
+                var seen = ts.createMap();
+                for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
+                    var prop = _a[_i];
+                    if (prop.kind === 263 /* SpreadAssignment */ || prop.name.kind !== 71 /* Identifier */) {
+                        continue;
+                    }
+                    var identifier = prop.name;
+                    // ECMA-262 11.1.5 Object Initializer
+                    // If previous is not undefined then throw a SyntaxError exception if any of the following conditions are true
+                    // a.This production is contained in strict code and IsDataDescriptor(previous) is true and
+                    // IsDataDescriptor(propId.descriptor) is true.
+                    //    b.IsDataDescriptor(previous) is true and IsAccessorDescriptor(propId.descriptor) is true.
+                    //    c.IsAccessorDescriptor(previous) is true and IsDataDescriptor(propId.descriptor) is true.
+                    //    d.IsAccessorDescriptor(previous) is true and IsAccessorDescriptor(propId.descriptor) is true
+                    // and either both previous and propId.descriptor have[[Get]] fields or both previous and propId.descriptor have[[Set]] fields
+                    var currentKind = prop.kind === 261 /* PropertyAssignment */ || prop.kind === 262 /* ShorthandPropertyAssignment */ || prop.kind === 151 /* MethodDeclaration */
+                        ? 1 /* Property */
+                        : 2 /* Accessor */;
+                    var existingKind = seen.get(identifier.text);
+                    if (!existingKind) {
+                        seen.set(identifier.text, currentKind);
+                        continue;
+                    }
+                    if (currentKind === 1 /* Property */ && existingKind === 1 /* Property */) {
+                        var span_1 = ts.getErrorSpanForNode(file, identifier);
+                        file.bindDiagnostics.push(ts.createFileDiagnostic(file, span_1.start, span_1.length, ts.Diagnostics.An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode));
+                    }
+                }
             }
-            // Now see if we might be in cases '2' or '3'.
-            // If the expression was a LHS expression, and we have an assignment operator, then
-            // we're in '2' or '3'. Consume the assignment and return.
-            //
-            // Note: we call reScanGreaterToken so that we get an appropriately merged token
-            // for cases like > > =  becoming >>=
-            if (ts.isLeftHandSideExpression(expr) && ts.isAssignmentOperator(reScanGreaterToken())) {
-                return makeBinaryExpression(expr, parseTokenNode(), parseAssignmentExpressionOrHigher());
+            return bindAnonymousDeclaration(node, 4096 /* ObjectLiteral */, "__object");
+        }
+        function bindJsxAttributes(node) {
+            return bindAnonymousDeclaration(node, 4096 /* ObjectLiteral */, "__jsxAttributes");
+        }
+        function bindJsxAttribute(node, symbolFlags, symbolExcludes) {
+            return declareSymbolAndAddToSymbolTable(node, symbolFlags, symbolExcludes);
+        }
+        function bindAnonymousDeclaration(node, symbolFlags, name) {
+            var symbol = createSymbol(symbolFlags, name);
+            addDeclarationToSymbol(symbol, node, symbolFlags);
+        }
+        function bindBlockScopedDeclaration(node, symbolFlags, symbolExcludes) {
+            switch (blockScopeContainer.kind) {
+                case 233 /* ModuleDeclaration */:
+                    declareModuleMember(node, symbolFlags, symbolExcludes);
+                    break;
+                case 265 /* SourceFile */:
+                    if (ts.isExternalModule(container)) {
+                        declareModuleMember(node, symbolFlags, symbolExcludes);
+                        break;
+                    }
+                // falls through
+                default:
+                    if (!blockScopeContainer.locals) {
+                        blockScopeContainer.locals = ts.createMap();
+                        addToContainerChain(blockScopeContainer);
+                    }
+                    declareSymbol(blockScopeContainer.locals, /*parent*/ undefined, node, symbolFlags, symbolExcludes);
             }
-            // It wasn't an assignment or a lambda.  This is a conditional expression:
-            return parseConditionalExpressionRest(expr);
         }
-        function isYieldExpression() {
-            if (token() === 114 /* YieldKeyword */) {
-                // If we have a 'yield' keyword, and this is a context where yield expressions are
-                // allowed, then definitely parse out a yield expression.
-                if (inYieldContext()) {
-                    return true;
+        function bindBlockScopedVariableDeclaration(node) {
+            bindBlockScopedDeclaration(node, 2 /* BlockScopedVariable */, 107455 /* BlockScopedVariableExcludes */);
+        }
+        // The binder visits every node in the syntax tree so it is a convenient place to perform a single localized
+        // check for reserved words used as identifiers in strict mode code.
+        function checkStrictModeIdentifier(node) {
+            if (inStrictMode &&
+                node.originalKeywordKind >= 108 /* FirstFutureReservedWord */ &&
+                node.originalKeywordKind <= 116 /* LastFutureReservedWord */ &&
+                !ts.isIdentifierName(node) &&
+                !ts.isInAmbientContext(node)) {
+                // Report error only if there are no parse errors in file
+                if (!file.parseDiagnostics.length) {
+                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node, getStrictModeIdentifierMessage(node), ts.declarationNameToString(node)));
                 }
-                // We're in a context where 'yield expr' is not allowed.  However, if we can
-                // definitely tell that the user was trying to parse a 'yield expr' and not
-                // just a normal expr that start with a 'yield' identifier, then parse out
-                // a 'yield expr'.  We can then report an error later that they are only
-                // allowed in generator expressions.
-                //
-                // for example, if we see 'yield(foo)', then we'll have to treat that as an
-                // invocation expression of something called 'yield'.  However, if we have
-                // 'yield foo' then that is not legal as a normal expression, so we can
-                // definitely recognize this as a yield expression.
-                //
-                // for now we just check if the next token is an identifier.  More heuristics
-                // can be added here later as necessary.  We just need to make sure that we
-                // don't accidentally consume something legal.
-                return lookAhead(nextTokenIsIdentifierOrKeywordOrNumberOnSameLine);
             }
-            return false;
-        }
-        function nextTokenIsIdentifierOnSameLine() {
-            nextToken();
-            return !scanner.hasPrecedingLineBreak() && isIdentifier();
         }
-        function parseYieldExpression() {
-            var node = createNode(190 /* YieldExpression */);
-            // YieldExpression[In] :
-            //      yield
-            //      yield [no LineTerminator here] [Lexical goal InputElementRegExp]AssignmentExpression[?In, Yield]
-            //      yield [no LineTerminator here] * [Lexical goal InputElementRegExp]AssignmentExpression[?In, Yield]
-            nextToken();
-            if (!scanner.hasPrecedingLineBreak() &&
-                (token() === 37 /* AsteriskToken */ || isStartOfExpression())) {
-                node.asteriskToken = parseOptionalToken(37 /* AsteriskToken */);
-                node.expression = parseAssignmentExpressionOrHigher();
-                return finishNode(node);
+        function getStrictModeIdentifierMessage(node) {
+            // Provide specialized messages to help the user understand why we think they're in
+            // strict mode.
+            if (ts.getContainingClass(node)) {
+                return ts.Diagnostics.Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_strict_mode;
             }
-            else {
-                // if the next token is not on the same line as yield.  or we don't have an '*' or
-                // the start of an expression, then this is just a simple "yield" expression.
-                return finishNode(node);
+            if (file.externalModuleIndicator) {
+                return ts.Diagnostics.Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode;
             }
+            return ts.Diagnostics.Identifier_expected_0_is_a_reserved_word_in_strict_mode;
         }
-        function parseSimpleArrowFunctionExpression(identifier, asyncModifier) {
-            ts.Debug.assert(token() === 34 /* EqualsGreaterThanToken */, "parseSimpleArrowFunctionExpression should only have been called if we had a =>");
-            var node;
-            if (asyncModifier) {
-                node = createNode(180 /* ArrowFunction */, asyncModifier.pos);
-                node.modifiers = asyncModifier;
+        function checkStrictModeBinaryExpression(node) {
+            if (inStrictMode && ts.isLeftHandSideExpression(node.left) && ts.isAssignmentOperator(node.operatorToken.kind)) {
+                // ECMA 262 (Annex C) The identifier eval or arguments may not appear as the LeftHandSideExpression of an
+                // Assignment operator(11.13) or of a PostfixExpression(11.3)
+                checkStrictModeEvalOrArguments(node, node.left);
             }
-            else {
-                node = createNode(180 /* ArrowFunction */, identifier.pos);
+        }
+        function checkStrictModeCatchClause(node) {
+            // It is a SyntaxError if a TryStatement with a Catch occurs within strict code and the Identifier of the
+            // Catch production is eval or arguments
+            if (inStrictMode && node.variableDeclaration) {
+                checkStrictModeEvalOrArguments(node, node.variableDeclaration.name);
             }
-            var parameter = createNode(142 /* Parameter */, identifier.pos);
-            parameter.name = identifier;
-            finishNode(parameter);
-            node.parameters = createNodeArray([parameter], parameter.pos);
-            node.parameters.end = parameter.end;
-            node.equalsGreaterThanToken = parseExpectedToken(34 /* EqualsGreaterThanToken */, /*reportAtCurrentPosition*/ false, ts.Diagnostics._0_expected, "=>");
-            node.body = parseArrowFunctionExpressionBody(/*isAsync*/ !!asyncModifier);
-            return addJSDocComment(finishNode(node));
         }
-        function tryParseParenthesizedArrowFunctionExpression() {
-            var triState = isParenthesizedArrowFunctionExpression();
-            if (triState === 0 /* False */) {
-                // It's definitely not a parenthesized arrow function expression.
-                return undefined;
+        function checkStrictModeDeleteExpression(node) {
+            // Grammar checking
+            if (inStrictMode && node.expression.kind === 71 /* Identifier */) {
+                // When a delete operator occurs within strict mode code, a SyntaxError is thrown if its
+                // UnaryExpression is a direct reference to a variable, function argument, or function name
+                var span_2 = ts.getErrorSpanForNode(file, node.expression);
+                file.bindDiagnostics.push(ts.createFileDiagnostic(file, span_2.start, span_2.length, ts.Diagnostics.delete_cannot_be_called_on_an_identifier_in_strict_mode));
             }
-            // If we definitely have an arrow function, then we can just parse one, not requiring a
-            // following => or { token. Otherwise, we *might* have an arrow function.  Try to parse
-            // it out, but don't allow any ambiguity, and return 'undefined' if this could be an
-            // expression instead.
-            var arrowFunction = triState === 1 /* True */
-                ? parseParenthesizedArrowFunctionExpressionHead(/*allowAmbiguity*/ true)
-                : tryParse(parsePossibleParenthesizedArrowFunctionExpressionHead);
-            if (!arrowFunction) {
-                // Didn't appear to actually be a parenthesized arrow function.  Just bail out.
-                return undefined;
+        }
+        function isEvalOrArgumentsIdentifier(node) {
+            return node.kind === 71 /* Identifier */ &&
+                (node.text === "eval" || node.text === "arguments");
+        }
+        function checkStrictModeEvalOrArguments(contextNode, name) {
+            if (name && name.kind === 71 /* Identifier */) {
+                var identifier = name;
+                if (isEvalOrArgumentsIdentifier(identifier)) {
+                    // We check first if the name is inside class declaration or class expression; if so give explicit message
+                    // otherwise report generic error message.
+                    var span_3 = ts.getErrorSpanForNode(file, name);
+                    file.bindDiagnostics.push(ts.createFileDiagnostic(file, span_3.start, span_3.length, getStrictModeEvalOrArgumentsMessage(contextNode), identifier.text));
+                }
             }
-            var isAsync = !!(ts.getModifierFlags(arrowFunction) & 256 /* Async */);
-            // If we have an arrow, then try to parse the body. Even if not, try to parse if we
-            // have an opening brace, just in case we're in an error state.
-            var lastToken = token();
-            arrowFunction.equalsGreaterThanToken = parseExpectedToken(34 /* EqualsGreaterThanToken */, /*reportAtCurrentPosition*/ false, ts.Diagnostics._0_expected, "=>");
-            arrowFunction.body = (lastToken === 34 /* EqualsGreaterThanToken */ || lastToken === 15 /* OpenBraceToken */)
-                ? parseArrowFunctionExpressionBody(isAsync)
-                : parseIdentifier();
-            return addJSDocComment(finishNode(arrowFunction));
         }
-        //  True        -> We definitely expect a parenthesized arrow function here.
-        //  False       -> There *cannot* be a parenthesized arrow function here.
-        //  Unknown     -> There *might* be a parenthesized arrow function here.
-        //                 Speculatively look ahead to be sure, and rollback if not.
-        function isParenthesizedArrowFunctionExpression() {
-            if (token() === 17 /* OpenParenToken */ || token() === 25 /* LessThanToken */ || token() === 118 /* AsyncKeyword */) {
-                return lookAhead(isParenthesizedArrowFunctionExpressionWorker);
+        function getStrictModeEvalOrArgumentsMessage(node) {
+            // Provide specialized messages to help the user understand why we think they're in
+            // strict mode.
+            if (ts.getContainingClass(node)) {
+                return ts.Diagnostics.Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode;
             }
-            if (token() === 34 /* EqualsGreaterThanToken */) {
-                // ERROR RECOVERY TWEAK:
-                // If we see a standalone => try to parse it as an arrow function expression as that's
-                // likely what the user intended to write.
-                return 1 /* True */;
+            if (file.externalModuleIndicator) {
+                return ts.Diagnostics.Invalid_use_of_0_Modules_are_automatically_in_strict_mode;
             }
-            // Definitely not a parenthesized arrow function.
-            return 0 /* False */;
+            return ts.Diagnostics.Invalid_use_of_0_in_strict_mode;
         }
-        function isParenthesizedArrowFunctionExpressionWorker() {
-            if (token() === 118 /* AsyncKeyword */) {
-                nextToken();
-                if (scanner.hasPrecedingLineBreak()) {
-                    return 0 /* False */;
-                }
-                if (token() !== 17 /* OpenParenToken */ && token() !== 25 /* LessThanToken */) {
-                    return 0 /* False */;
-                }
+        function checkStrictModeFunctionName(node) {
+            if (inStrictMode) {
+                // It is a SyntaxError if the identifier eval or arguments appears within a FormalParameterList of a strict mode FunctionDeclaration or FunctionExpression (13.1))
+                checkStrictModeEvalOrArguments(node, node.name);
             }
-            var first = token();
-            var second = nextToken();
-            if (first === 17 /* OpenParenToken */) {
-                if (second === 18 /* CloseParenToken */) {
-                    // Simple cases: "() =>", "(): ", and  "() {".
-                    // This is an arrow function with no parameters.
-                    // The last one is not actually an arrow function,
-                    // but this is probably what the user intended.
-                    var third = nextToken();
-                    switch (third) {
-                        case 34 /* EqualsGreaterThanToken */:
-                        case 54 /* ColonToken */:
-                        case 15 /* OpenBraceToken */:
-                            return 1 /* True */;
-                        default:
-                            return 0 /* False */;
-                    }
-                }
-                // If encounter "([" or "({", this could be the start of a binding pattern.
-                // Examples:
-                //      ([ x ]) => { }
-                //      ({ x }) => { }
-                //      ([ x ])
-                //      ({ x })
-                if (second === 19 /* OpenBracketToken */ || second === 15 /* OpenBraceToken */) {
-                    return 2 /* Unknown */;
-                }
-                // Simple case: "(..."
-                // This is an arrow function with a rest parameter.
-                if (second === 22 /* DotDotDotToken */) {
-                    return 1 /* True */;
-                }
-                // If we had "(" followed by something that's not an identifier,
-                // then this definitely doesn't look like a lambda.
-                // Note: we could be a little more lenient and allow
-                // "(public" or "(private". These would not ever actually be allowed,
-                // but we could provide a good error message instead of bailing out.
-                if (!isIdentifier()) {
-                    return 0 /* False */;
-                }
-                // If we have something like "(a:", then we must have a
-                // type-annotated parameter in an arrow function expression.
-                if (nextToken() === 54 /* ColonToken */) {
-                    return 1 /* True */;
-                }
-                // This *could* be a parenthesized arrow function.
-                // Return Unknown to let the caller know.
-                return 2 /* Unknown */;
+        }
+        function getStrictModeBlockScopeFunctionDeclarationMessage(node) {
+            // Provide specialized messages to help the user understand why we think they're in
+            // strict mode.
+            if (ts.getContainingClass(node)) {
+                return ts.Diagnostics.Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Class_definitions_are_automatically_in_strict_mode;
             }
-            else {
-                ts.Debug.assert(first === 25 /* LessThanToken */);
-                // If we have "<" not followed by an identifier,
-                // then this definitely is not an arrow function.
-                if (!isIdentifier()) {
-                    return 0 /* False */;
-                }
-                // JSX overrides
-                if (sourceFile.languageVariant === 1 /* JSX */) {
-                    var isArrowFunctionInJsx = lookAhead(function () {
-                        var third = nextToken();
-                        if (third === 83 /* ExtendsKeyword */) {
-                            var fourth = nextToken();
-                            switch (fourth) {
-                                case 56 /* EqualsToken */:
-                                case 27 /* GreaterThanToken */:
-                                    return false;
-                                default:
-                                    return true;
-                            }
-                        }
-                        else if (third === 24 /* CommaToken */) {
-                            return true;
-                        }
-                        return false;
-                    });
-                    if (isArrowFunctionInJsx) {
-                        return 1 /* True */;
-                    }
-                    return 0 /* False */;
+            if (file.externalModuleIndicator) {
+                return ts.Diagnostics.Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_are_automatically_in_strict_mode;
+            }
+            return ts.Diagnostics.Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5;
+        }
+        function checkStrictModeFunctionDeclaration(node) {
+            if (languageVersion < 2 /* ES2015 */) {
+                // Report error if function is not top level function declaration
+                if (blockScopeContainer.kind !== 265 /* SourceFile */ &&
+                    blockScopeContainer.kind !== 233 /* ModuleDeclaration */ &&
+                    !ts.isFunctionLike(blockScopeContainer)) {
+                    // We check first if the name is inside class declaration or class expression; if so give explicit message
+                    // otherwise report generic error message.
+                    var errorSpan = ts.getErrorSpanForNode(file, node);
+                    file.bindDiagnostics.push(ts.createFileDiagnostic(file, errorSpan.start, errorSpan.length, getStrictModeBlockScopeFunctionDeclarationMessage(node)));
                 }
-                // This *could* be a parenthesized arrow function.
-                return 2 /* Unknown */;
             }
         }
-        function parsePossibleParenthesizedArrowFunctionExpressionHead() {
-            return parseParenthesizedArrowFunctionExpressionHead(/*allowAmbiguity*/ false);
+        function checkStrictModeNumericLiteral(node) {
+            if (inStrictMode && node.numericLiteralFlags & 4 /* Octal */) {
+                file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Octal_literals_are_not_allowed_in_strict_mode));
+            }
         }
-        function tryParseAsyncSimpleArrowFunctionExpression() {
-            // We do a check here so that we won't be doing unnecessarily call to "lookAhead"
-            if (token() === 118 /* AsyncKeyword */) {
-                var isUnParenthesizedAsyncArrowFunction = lookAhead(isUnParenthesizedAsyncArrowFunctionWorker);
-                if (isUnParenthesizedAsyncArrowFunction === 1 /* True */) {
-                    var asyncModifier = parseModifiersForArrowFunction();
-                    var expr = parseBinaryExpressionOrHigher(/*precedence*/ 0);
-                    return parseSimpleArrowFunctionExpression(expr, asyncModifier);
+        function checkStrictModePostfixUnaryExpression(node) {
+            // Grammar checking
+            // The identifier eval or arguments may not appear as the LeftHandSideExpression of an
+            // Assignment operator(11.13) or of a PostfixExpression(11.3) or as the UnaryExpression
+            // operated upon by a Prefix Increment(11.4.4) or a Prefix Decrement(11.4.5) operator.
+            if (inStrictMode) {
+                checkStrictModeEvalOrArguments(node, node.operand);
+            }
+        }
+        function checkStrictModePrefixUnaryExpression(node) {
+            // Grammar checking
+            if (inStrictMode) {
+                if (node.operator === 43 /* PlusPlusToken */ || node.operator === 44 /* MinusMinusToken */) {
+                    checkStrictModeEvalOrArguments(node, node.operand);
                 }
             }
-            return undefined;
         }
-        function isUnParenthesizedAsyncArrowFunctionWorker() {
-            // AsyncArrowFunctionExpression:
-            //      1) async[no LineTerminator here]AsyncArrowBindingIdentifier[?Yield][no LineTerminator here]=>AsyncConciseBody[?In]
-            //      2) CoverCallExpressionAndAsyncArrowHead[?Yield, ?Await][no LineTerminator here]=>AsyncConciseBody[?In]
-            if (token() === 118 /* AsyncKeyword */) {
-                nextToken();
-                // If the "async" is followed by "=>" token then it is not a begining of an async arrow-function
-                // but instead a simple arrow-function which will be parsed inside "parseAssignmentExpressionOrHigher"
-                if (scanner.hasPrecedingLineBreak() || token() === 34 /* EqualsGreaterThanToken */) {
-                    return 0 /* False */;
+        function checkStrictModeWithStatement(node) {
+            // Grammar checking for withStatement
+            if (inStrictMode) {
+                errorOnFirstToken(node, ts.Diagnostics.with_statements_are_not_allowed_in_strict_mode);
+            }
+        }
+        function errorOnFirstToken(node, message, arg0, arg1, arg2) {
+            var span = ts.getSpanOfTokenAtPosition(file, node.pos);
+            file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, message, arg0, arg1, arg2));
+        }
+        function getDestructuringParameterName(node) {
+            return "__" + ts.indexOf(node.parent.parameters, node);
+        }
+        function bind(node) {
+            if (!node) {
+                return;
+            }
+            node.parent = parent;
+            var saveInStrictMode = inStrictMode;
+            // Even though in the AST the jsdoc @typedef node belongs to the current node,
+            // its symbol might be in the same scope with the current node's symbol. Consider:
+            //
+            //     /** @typedef {string | number} MyType */
+            //     function foo();
+            //
+            // Here the current node is "foo", which is a container, but the scope of "MyType" should
+            // not be inside "foo". Therefore we always bind @typedef before bind the parent node,
+            // and skip binding this tag later when binding all the other jsdoc tags.
+            if (ts.isInJavaScriptFile(node))
+                bindJSDocTypedefTagIfAny(node);
+            // First we bind declaration nodes to a symbol if possible. We'll both create a symbol
+            // and then potentially add the symbol to an appropriate symbol table. Possible
+            // destination symbol tables are:
+            //
+            //  1) The 'exports' table of the current container's symbol.
+            //  2) The 'members' table of the current container's symbol.
+            //  3) The 'locals' table of the current container.
+            //
+            // However, not all symbols will end up in any of these tables. 'Anonymous' symbols
+            // (like TypeLiterals for example) will not be put in any table.
+            bindWorker(node);
+            // Then we recurse into the children of the node to bind them as well. For certain
+            // symbols we do specialized work when we recurse. For example, we'll keep track of
+            // the current 'container' node when it changes. This helps us know which symbol table
+            // a local should go into for example. Since terminal nodes are known not to have
+            // children, as an optimization we don't process those.
+            if (node.kind > 142 /* LastToken */) {
+                var saveParent = parent;
+                parent = node;
+                var containerFlags = getContainerFlags(node);
+                if (containerFlags === 0 /* None */) {
+                    bindChildren(node);
                 }
-                // Check for un-parenthesized AsyncArrowFunction
-                var expr = parseBinaryExpressionOrHigher(/*precedence*/ 0);
-                if (!scanner.hasPrecedingLineBreak() && expr.kind === 69 /* Identifier */ && token() === 34 /* EqualsGreaterThanToken */) {
-                    return 1 /* True */;
+                else {
+                    bindContainer(node, containerFlags);
                 }
+                parent = saveParent;
             }
-            return 0 /* False */;
+            else if (!skipTransformFlagAggregation && (node.transformFlags & 536870912 /* HasComputedFlags */) === 0) {
+                subtreeTransformFlags |= computeTransformFlagsForNode(node, 0);
+            }
+            inStrictMode = saveInStrictMode;
         }
-        function parseParenthesizedArrowFunctionExpressionHead(allowAmbiguity) {
-            var node = createNode(180 /* ArrowFunction */);
-            node.modifiers = parseModifiersForArrowFunction();
-            var isAsync = !!(ts.getModifierFlags(node) & 256 /* Async */);
-            // Arrow functions are never generators.
-            //
-            // If we're speculatively parsing a signature for a parenthesized arrow function, then
-            // we have to have a complete parameter list.  Otherwise we might see something like
-            // a => (b => c)
-            // And think that "(b =>" was actually a parenthesized arrow function with a missing
-            // close paren.
-            fillSignature(54 /* ColonToken */, /*yieldContext*/ false, /*awaitContext*/ isAsync, /*requireCompleteParameterList*/ !allowAmbiguity, node);
-            // If we couldn't get parameters, we definitely could not parse out an arrow function.
-            if (!node.parameters) {
-                return undefined;
+        function bindJSDocTypedefTagIfAny(node) {
+            if (!node.jsDoc) {
+                return;
             }
-            // Parsing a signature isn't enough.
-            // Parenthesized arrow signatures often look like other valid expressions.
-            // For instance:
-            //  - "(x = 10)" is an assignment expression parsed as a signature with a default parameter value.
-            //  - "(x,y)" is a comma expression parsed as a signature with two parameters.
-            //  - "a ? (b): c" will have "(b):" parsed as a signature with a return type annotation.
-            //
-            // So we need just a bit of lookahead to ensure that it can only be a signature.
-            if (!allowAmbiguity && token() !== 34 /* EqualsGreaterThanToken */ && token() !== 15 /* OpenBraceToken */) {
-                // Returning undefined here will cause our caller to rewind to where we started from.
-                return undefined;
+            for (var _i = 0, _a = node.jsDoc; _i < _a.length; _i++) {
+                var jsDoc = _a[_i];
+                if (!jsDoc.tags) {
+                    continue;
+                }
+                for (var _b = 0, _c = jsDoc.tags; _b < _c.length; _b++) {
+                    var tag = _c[_b];
+                    if (tag.kind === 291 /* JSDocTypedefTag */) {
+                        var savedParent = parent;
+                        parent = jsDoc;
+                        bind(tag);
+                        parent = savedParent;
+                    }
+                }
             }
-            return node;
         }
-        function parseArrowFunctionExpressionBody(isAsync) {
-            if (token() === 15 /* OpenBraceToken */) {
-                return parseFunctionBlock(/*allowYield*/ false, /*allowAwait*/ isAsync, /*ignoreMissingOpenBrace*/ false);
+        function updateStrictModeStatementList(statements) {
+            if (!inStrictMode) {
+                for (var _i = 0, statements_1 = statements; _i < statements_1.length; _i++) {
+                    var statement = statements_1[_i];
+                    if (!ts.isPrologueDirective(statement)) {
+                        return;
+                    }
+                    if (isUseStrictPrologueDirective(statement)) {
+                        inStrictMode = true;
+                        return;
+                    }
+                }
             }
-            if (token() !== 23 /* SemicolonToken */ &&
-                token() !== 87 /* FunctionKeyword */ &&
-                token() !== 73 /* ClassKeyword */ &&
-                isStartOfStatement() &&
-                !isStartOfExpressionStatement()) {
-                // Check if we got a plain statement (i.e. no expression-statements, no function/class expressions/declarations)
-                //
-                // Here we try to recover from a potential error situation in the case where the
-                // user meant to supply a block. For example, if the user wrote:
-                //
-                //  a =>
-                //      let v = 0;
-                //  }
-                //
-                // they may be missing an open brace.  Check to see if that's the case so we can
-                // try to recover better.  If we don't do this, then the next close curly we see may end
-                // up preemptively closing the containing construct.
-                //
-                // Note: even when 'ignoreMissingOpenBrace' is passed as true, parseBody will still error.
-                return parseFunctionBlock(/*allowYield*/ false, /*allowAwait*/ isAsync, /*ignoreMissingOpenBrace*/ true);
+        }
+        /// Should be called only on prologue directives (isPrologueDirective(node) should be true)
+        function isUseStrictPrologueDirective(node) {
+            var nodeText = ts.getTextOfNodeFromSourceText(file.text, node.expression);
+            // Note: the node text must be exactly "use strict" or 'use strict'.  It is not ok for the
+            // string to contain unicode escapes (as per ES5).
+            return nodeText === '"use strict"' || nodeText === "'use strict'";
+        }
+        function bindWorker(node) {
+            switch (node.kind) {
+                /* Strict mode checks */
+                case 71 /* Identifier */:
+                    // for typedef type names with namespaces, bind the new jsdoc type symbol here
+                    // because it requires all containing namespaces to be in effect, namely the
+                    // current "blockScopeContainer" needs to be set to its immediate namespace parent.
+                    if (node.isInJSDocNamespace) {
+                        var parentNode = node.parent;
+                        while (parentNode && parentNode.kind !== 291 /* JSDocTypedefTag */) {
+                            parentNode = parentNode.parent;
+                        }
+                        bindBlockScopedDeclaration(parentNode, 524288 /* TypeAlias */, 793064 /* TypeAliasExcludes */);
+                        break;
+                    }
+                // falls through
+                case 99 /* ThisKeyword */:
+                    if (currentFlow && (ts.isExpression(node) || parent.kind === 262 /* ShorthandPropertyAssignment */)) {
+                        node.flowNode = currentFlow;
+                    }
+                    return checkStrictModeIdentifier(node);
+                case 179 /* PropertyAccessExpression */:
+                    if (currentFlow && isNarrowableReference(node)) {
+                        node.flowNode = currentFlow;
+                    }
+                    break;
+                case 194 /* BinaryExpression */:
+                    var specialKind = ts.getSpecialPropertyAssignmentKind(node);
+                    switch (specialKind) {
+                        case 1 /* ExportsProperty */:
+                            bindExportsPropertyAssignment(node);
+                            break;
+                        case 2 /* ModuleExports */:
+                            bindModuleExportsAssignment(node);
+                            break;
+                        case 3 /* PrototypeProperty */:
+                            bindPrototypePropertyAssignment(node);
+                            break;
+                        case 4 /* ThisProperty */:
+                            bindThisPropertyAssignment(node);
+                            break;
+                        case 5 /* Property */:
+                            bindStaticPropertyAssignment(node);
+                            break;
+                        case 0 /* None */:
+                            // Nothing to do
+                            break;
+                        default:
+                            ts.Debug.fail("Unknown special property assignment kind");
+                    }
+                    return checkStrictModeBinaryExpression(node);
+                case 260 /* CatchClause */:
+                    return checkStrictModeCatchClause(node);
+                case 188 /* DeleteExpression */:
+                    return checkStrictModeDeleteExpression(node);
+                case 8 /* NumericLiteral */:
+                    return checkStrictModeNumericLiteral(node);
+                case 193 /* PostfixUnaryExpression */:
+                    return checkStrictModePostfixUnaryExpression(node);
+                case 192 /* PrefixUnaryExpression */:
+                    return checkStrictModePrefixUnaryExpression(node);
+                case 220 /* WithStatement */:
+                    return checkStrictModeWithStatement(node);
+                case 169 /* ThisType */:
+                    seenThisKeyword = true;
+                    return;
+                case 158 /* TypePredicate */:
+                    return checkTypePredicate(node);
+                case 145 /* TypeParameter */:
+                    return declareSymbolAndAddToSymbolTable(node, 262144 /* TypeParameter */, 530920 /* TypeParameterExcludes */);
+                case 146 /* Parameter */:
+                    return bindParameter(node);
+                case 226 /* VariableDeclaration */:
+                case 176 /* BindingElement */:
+                    return bindVariableDeclarationOrBindingElement(node);
+                case 149 /* PropertyDeclaration */:
+                case 148 /* PropertySignature */:
+                    return bindPropertyWorker(node);
+                case 261 /* PropertyAssignment */:
+                case 262 /* ShorthandPropertyAssignment */:
+                    return bindPropertyOrMethodOrAccessor(node, 4 /* Property */, 0 /* PropertyExcludes */);
+                case 264 /* EnumMember */:
+                    return bindPropertyOrMethodOrAccessor(node, 8 /* EnumMember */, 900095 /* EnumMemberExcludes */);
+                case 263 /* SpreadAssignment */:
+                case 255 /* JsxSpreadAttribute */:
+                    var root = container;
+                    var hasRest = false;
+                    while (root.parent) {
+                        if (root.kind === 178 /* ObjectLiteralExpression */ &&
+                            root.parent.kind === 194 /* BinaryExpression */ &&
+                            root.parent.operatorToken.kind === 58 /* EqualsToken */ &&
+                            root.parent.left === root) {
+                            hasRest = true;
+                            break;
+                        }
+                        root = root.parent;
+                    }
+                    return;
+                case 155 /* CallSignature */:
+                case 156 /* ConstructSignature */:
+                case 157 /* IndexSignature */:
+                    return declareSymbolAndAddToSymbolTable(node, 131072 /* Signature */, 0 /* None */);
+                case 151 /* MethodDeclaration */:
+                case 150 /* MethodSignature */:
+                    // If this is an ObjectLiteralExpression method, then it sits in the same space
+                    // as other properties in the object literal.  So we use SymbolFlags.PropertyExcludes
+                    // so that it will conflict with any other object literal members with the same
+                    // name.
+                    return bindPropertyOrMethodOrAccessor(node, 8192 /* Method */ | (node.questionToken ? 67108864 /* Optional */ : 0 /* None */), ts.isObjectLiteralMethod(node) ? 0 /* PropertyExcludes */ : 99263 /* MethodExcludes */);
+                case 228 /* FunctionDeclaration */:
+                    return bindFunctionDeclaration(node);
+                case 152 /* Constructor */:
+                    return declareSymbolAndAddToSymbolTable(node, 16384 /* Constructor */, /*symbolExcludes:*/ 0 /* None */);
+                case 153 /* GetAccessor */:
+                    return bindPropertyOrMethodOrAccessor(node, 32768 /* GetAccessor */, 41919 /* GetAccessorExcludes */);
+                case 154 /* SetAccessor */:
+                    return bindPropertyOrMethodOrAccessor(node, 65536 /* SetAccessor */, 74687 /* SetAccessorExcludes */);
+                case 160 /* FunctionType */:
+                case 161 /* ConstructorType */:
+                    return bindFunctionOrConstructorType(node);
+                case 163 /* TypeLiteral */:
+                case 172 /* MappedType */:
+                    return bindAnonymousTypeWorker(node);
+                case 178 /* ObjectLiteralExpression */:
+                    return bindObjectLiteralExpression(node);
+                case 186 /* FunctionExpression */:
+                case 187 /* ArrowFunction */:
+                    return bindFunctionExpression(node);
+                case 181 /* CallExpression */:
+                    if (ts.isInJavaScriptFile(node)) {
+                        bindCallExpression(node);
+                    }
+                    break;
+                // Members of classes, interfaces, and modules
+                case 199 /* ClassExpression */:
+                case 229 /* ClassDeclaration */:
+                    // All classes are automatically in strict mode in ES6.
+                    inStrictMode = true;
+                    return bindClassLikeDeclaration(node);
+                case 230 /* InterfaceDeclaration */:
+                    return bindBlockScopedDeclaration(node, 64 /* Interface */, 792968 /* InterfaceExcludes */);
+                case 231 /* TypeAliasDeclaration */:
+                    return bindBlockScopedDeclaration(node, 524288 /* TypeAlias */, 793064 /* TypeAliasExcludes */);
+                case 232 /* EnumDeclaration */:
+                    return bindEnumDeclaration(node);
+                case 233 /* ModuleDeclaration */:
+                    return bindModuleDeclaration(node);
+                // Jsx-attributes
+                case 254 /* JsxAttributes */:
+                    return bindJsxAttributes(node);
+                case 253 /* JsxAttribute */:
+                    return bindJsxAttribute(node, 4 /* Property */, 0 /* PropertyExcludes */);
+                // Imports and exports
+                case 237 /* ImportEqualsDeclaration */:
+                case 240 /* NamespaceImport */:
+                case 242 /* ImportSpecifier */:
+                case 246 /* ExportSpecifier */:
+                    return declareSymbolAndAddToSymbolTable(node, 8388608 /* Alias */, 8388608 /* AliasExcludes */);
+                case 236 /* NamespaceExportDeclaration */:
+                    return bindNamespaceExportDeclaration(node);
+                case 239 /* ImportClause */:
+                    return bindImportClause(node);
+                case 244 /* ExportDeclaration */:
+                    return bindExportDeclaration(node);
+                case 243 /* ExportAssignment */:
+                    return bindExportAssignment(node);
+                case 265 /* SourceFile */:
+                    updateStrictModeStatementList(node.statements);
+                    return bindSourceFileIfExternalModule();
+                case 207 /* Block */:
+                    if (!ts.isFunctionLike(node.parent)) {
+                        return;
+                    }
+                // falls through
+                case 234 /* ModuleBlock */:
+                    return updateStrictModeStatementList(node.statements);
+                case 276 /* JSDocRecordMember */:
+                    return bindPropertyWorker(node);
+                case 292 /* JSDocPropertyTag */:
+                    return declareSymbolAndAddToSymbolTable(node, node.isBracketed || (node.typeExpression && node.typeExpression.type.kind === 278 /* JSDocOptionalType */) ?
+                        4 /* Property */ | 67108864 /* Optional */ : 4 /* Property */, 0 /* PropertyExcludes */);
+                case 279 /* JSDocFunctionType */:
+                    return bindFunctionOrConstructorType(node);
+                case 293 /* JSDocTypeLiteral */:
+                case 275 /* JSDocRecordType */:
+                    return bindAnonymousTypeWorker(node);
+                case 291 /* JSDocTypedefTag */: {
+                    var fullName = node.fullName;
+                    if (!fullName || fullName.kind === 71 /* Identifier */) {
+                        return bindBlockScopedDeclaration(node, 524288 /* TypeAlias */, 793064 /* TypeAliasExcludes */);
+                    }
+                    break;
+                }
             }
-            return isAsync
-                ? doInAwaitContext(parseAssignmentExpressionOrHigher)
-                : doOutsideOfAwaitContext(parseAssignmentExpressionOrHigher);
         }
-        function parseConditionalExpressionRest(leftOperand) {
-            // Note: we are passed in an expression which was produced from parseBinaryExpressionOrHigher.
-            var questionToken = parseOptionalToken(53 /* QuestionToken */);
-            if (!questionToken) {
-                return leftOperand;
+        function bindPropertyWorker(node) {
+            return bindPropertyOrMethodOrAccessor(node, 4 /* Property */ | (node.questionToken ? 67108864 /* Optional */ : 0 /* None */), 0 /* PropertyExcludes */);
+        }
+        function bindAnonymousTypeWorker(node) {
+            return bindAnonymousDeclaration(node, 2048 /* TypeLiteral */, "__type");
+        }
+        function checkTypePredicate(node) {
+            var parameterName = node.parameterName, type = node.type;
+            if (parameterName && parameterName.kind === 71 /* Identifier */) {
+                checkStrictModeIdentifier(parameterName);
             }
-            // Note: we explicitly 'allowIn' in the whenTrue part of the condition expression, and
-            // we do not that for the 'whenFalse' part.
-            var node = createNode(188 /* ConditionalExpression */, leftOperand.pos);
-            node.condition = leftOperand;
-            node.questionToken = questionToken;
-            node.whenTrue = doOutsideOfContext(disallowInAndDecoratorContext, parseAssignmentExpressionOrHigher);
-            node.colonToken = parseExpectedToken(54 /* ColonToken */, /*reportAtCurrentPosition*/ false, ts.Diagnostics._0_expected, ts.tokenToString(54 /* ColonToken */));
-            node.whenFalse = parseAssignmentExpressionOrHigher();
-            return finishNode(node);
+            if (parameterName && parameterName.kind === 169 /* ThisType */) {
+                seenThisKeyword = true;
+            }
+            bind(type);
         }
-        function parseBinaryExpressionOrHigher(precedence) {
-            var leftOperand = parseUnaryExpressionOrHigher();
-            return parseBinaryExpressionRest(precedence, leftOperand);
+        function bindSourceFileIfExternalModule() {
+            setExportContextFlag(file);
+            if (ts.isExternalModule(file)) {
+                bindSourceFileAsExternalModule();
+            }
         }
-        function isInOrOfKeyword(t) {
-            return t === 90 /* InKeyword */ || t === 138 /* OfKeyword */;
+        function bindSourceFileAsExternalModule() {
+            bindAnonymousDeclaration(file, 512 /* ValueModule */, "\"" + ts.removeFileExtension(file.fileName) + "\"");
         }
-        function parseBinaryExpressionRest(precedence, leftOperand) {
-            while (true) {
-                // We either have a binary operator here, or we're finished.  We call
-                // reScanGreaterToken so that we merge token sequences like > and = into >=
-                reScanGreaterToken();
-                var newPrecedence = getBinaryOperatorPrecedence();
-                // Check the precedence to see if we should "take" this operator
-                // - For left associative operator (all operator but **), consume the operator,
-                //   recursively call the function below, and parse binaryExpression as a rightOperand
-                //   of the caller if the new precedence of the operator is greater then or equal to the current precedence.
-                //   For example:
-                //      a - b - c;
-                //            ^token; leftOperand = b. Return b to the caller as a rightOperand
-                //      a * b - c
-                //            ^token; leftOperand = b. Return b to the caller as a rightOperand
-                //      a - b * c;
-                //            ^token; leftOperand = b. Return b * c to the caller as a rightOperand
-                // - For right associative operator (**), consume the operator, recursively call the function
-                //   and parse binaryExpression as a rightOperand of the caller if the new precedence of
-                //   the operator is strictly grater than the current precedence
-                //   For example:
-                //      a ** b ** c;
-                //             ^^token; leftOperand = b. Return b ** c to the caller as a rightOperand
-                //      a - b ** c;
-                //            ^^token; leftOperand = b. Return b ** c to the caller as a rightOperand
-                //      a ** b - c
-                //             ^token; leftOperand = b. Return b to the caller as a rightOperand
-                var consumeCurrentOperator = token() === 38 /* AsteriskAsteriskToken */ ?
-                    newPrecedence >= precedence :
-                    newPrecedence > precedence;
-                if (!consumeCurrentOperator) {
-                    break;
-                }
-                if (token() === 90 /* InKeyword */ && inDisallowInContext()) {
-                    break;
-                }
-                if (token() === 116 /* AsKeyword */) {
-                    // Make sure we *do* perform ASI for constructs like this:
-                    //    var x = foo
-                    //    as (Bar)
-                    // This should be parsed as an initialized variable, followed
-                    // by a function call to 'as' with the argument 'Bar'
-                    if (scanner.hasPrecedingLineBreak()) {
-                        break;
-                    }
-                    else {
-                        nextToken();
-                        leftOperand = makeAsExpression(leftOperand, parseType());
-                    }
+        function bindExportAssignment(node) {
+            if (!container.symbol || !container.symbol.exports) {
+                // Export assignment in some sort of block construct
+                bindAnonymousDeclaration(node, 8388608 /* Alias */, getDeclarationName(node));
+            }
+            else {
+                // An export default clause with an expression exports a value
+                // We want to exclude both class and function here,  this is necessary to issue an error when there are both
+                // default export-assignment and default export function and class declaration.
+                var flags = node.kind === 243 /* ExportAssignment */ && ts.exportAssignmentIsAlias(node)
+                    ? 8388608 /* Alias */
+                    : 4 /* Property */;
+                declareSymbol(container.symbol.exports, container.symbol, node, flags, 4 /* Property */ | 8388608 /* AliasExcludes */ | 32 /* Class */ | 16 /* Function */);
+            }
+        }
+        function bindNamespaceExportDeclaration(node) {
+            if (node.modifiers && node.modifiers.length) {
+                file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Modifiers_cannot_appear_here));
+            }
+            if (node.parent.kind !== 265 /* SourceFile */) {
+                file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Global_module_exports_may_only_appear_at_top_level));
+                return;
+            }
+            else {
+                var parent_4 = node.parent;
+                if (!ts.isExternalModule(parent_4)) {
+                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Global_module_exports_may_only_appear_in_module_files));
+                    return;
                 }
-                else {
-                    leftOperand = makeBinaryExpression(leftOperand, parseTokenNode(), parseBinaryExpressionOrHigher(newPrecedence));
+                if (!parent_4.isDeclarationFile) {
+                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Global_module_exports_may_only_appear_in_declaration_files));
+                    return;
                 }
             }
-            return leftOperand;
+            file.symbol.globalExports = file.symbol.globalExports || ts.createMap();
+            declareSymbol(file.symbol.globalExports, file.symbol, node, 8388608 /* Alias */, 8388608 /* AliasExcludes */);
         }
-        function isBinaryOperator() {
-            if (inDisallowInContext() && token() === 90 /* InKeyword */) {
-                return false;
+        function bindExportDeclaration(node) {
+            if (!container.symbol || !container.symbol.exports) {
+                // Export * in some sort of block construct
+                bindAnonymousDeclaration(node, 33554432 /* ExportStar */, getDeclarationName(node));
             }
-            return getBinaryOperatorPrecedence() > 0;
-        }
-        function getBinaryOperatorPrecedence() {
-            switch (token()) {
-                case 52 /* BarBarToken */:
-                    return 1;
-                case 51 /* AmpersandAmpersandToken */:
-                    return 2;
-                case 47 /* BarToken */:
-                    return 3;
-                case 48 /* CaretToken */:
-                    return 4;
-                case 46 /* AmpersandToken */:
-                    return 5;
-                case 30 /* EqualsEqualsToken */:
-                case 31 /* ExclamationEqualsToken */:
-                case 32 /* EqualsEqualsEqualsToken */:
-                case 33 /* ExclamationEqualsEqualsToken */:
-                    return 6;
-                case 25 /* LessThanToken */:
-                case 27 /* GreaterThanToken */:
-                case 28 /* LessThanEqualsToken */:
-                case 29 /* GreaterThanEqualsToken */:
-                case 91 /* InstanceOfKeyword */:
-                case 90 /* InKeyword */:
-                case 116 /* AsKeyword */:
-                    return 7;
-                case 43 /* LessThanLessThanToken */:
-                case 44 /* GreaterThanGreaterThanToken */:
-                case 45 /* GreaterThanGreaterThanGreaterThanToken */:
-                    return 8;
-                case 35 /* PlusToken */:
-                case 36 /* MinusToken */:
-                    return 9;
-                case 37 /* AsteriskToken */:
-                case 39 /* SlashToken */:
-                case 40 /* PercentToken */:
-                    return 10;
-                case 38 /* AsteriskAsteriskToken */:
-                    return 11;
+            else if (!node.exportClause) {
+                // All export * declarations are collected in an __export symbol
+                declareSymbol(container.symbol.exports, container.symbol, node, 33554432 /* ExportStar */, 0 /* None */);
             }
-            // -1 is lower than all other precedences.  Returning it will cause binary expression
-            // parsing to stop.
-            return -1;
-        }
-        function makeBinaryExpression(left, operatorToken, right) {
-            var node = createNode(187 /* BinaryExpression */, left.pos);
-            node.left = left;
-            node.operatorToken = operatorToken;
-            node.right = right;
-            return finishNode(node);
-        }
-        function makeAsExpression(left, right) {
-            var node = createNode(195 /* AsExpression */, left.pos);
-            node.expression = left;
-            node.type = right;
-            return finishNode(node);
         }
-        function parsePrefixUnaryExpression() {
-            var node = createNode(185 /* PrefixUnaryExpression */);
-            node.operator = token();
-            nextToken();
-            node.operand = parseSimpleUnaryExpression();
-            return finishNode(node);
+        function bindImportClause(node) {
+            if (node.name) {
+                declareSymbolAndAddToSymbolTable(node, 8388608 /* Alias */, 8388608 /* AliasExcludes */);
+            }
         }
-        function parseDeleteExpression() {
-            var node = createNode(181 /* DeleteExpression */);
-            nextToken();
-            node.expression = parseSimpleUnaryExpression();
-            return finishNode(node);
+        function setCommonJsModuleIndicator(node) {
+            if (!file.commonJsModuleIndicator) {
+                file.commonJsModuleIndicator = node;
+                if (!file.externalModuleIndicator) {
+                    bindSourceFileAsExternalModule();
+                }
+            }
         }
-        function parseTypeOfExpression() {
-            var node = createNode(182 /* TypeOfExpression */);
-            nextToken();
-            node.expression = parseSimpleUnaryExpression();
-            return finishNode(node);
+        function bindExportsPropertyAssignment(node) {
+            // When we create a property via 'exports.foo = bar', the 'exports.foo' property access
+            // expression is the declaration
+            setCommonJsModuleIndicator(node);
+            declareSymbol(file.symbol.exports, file.symbol, node.left, 4 /* Property */ | 7340032 /* Export */, 0 /* None */);
         }
-        function parseVoidExpression() {
-            var node = createNode(183 /* VoidExpression */);
-            nextToken();
-            node.expression = parseSimpleUnaryExpression();
-            return finishNode(node);
+        function isExportsOrModuleExportsOrAlias(node) {
+            return ts.isExportsIdentifier(node) ||
+                ts.isModuleExportsPropertyAccessExpression(node) ||
+                isNameOfExportsOrModuleExportsAliasDeclaration(node);
         }
-        function isAwaitExpression() {
-            if (token() === 119 /* AwaitKeyword */) {
-                if (inAwaitContext()) {
-                    return true;
+        function isNameOfExportsOrModuleExportsAliasDeclaration(node) {
+            if (node.kind === 71 /* Identifier */) {
+                var symbol = lookupSymbolForName(node.text);
+                if (symbol && symbol.valueDeclaration && symbol.valueDeclaration.kind === 226 /* VariableDeclaration */) {
+                    var declaration = symbol.valueDeclaration;
+                    if (declaration.initializer) {
+                        return isExportsOrModuleExportsOrAliasOrAssignemnt(declaration.initializer);
+                    }
                 }
-                // here we are using similar heuristics as 'isYieldExpression'
-                return lookAhead(nextTokenIsIdentifierOnSameLine);
             }
             return false;
         }
-        function parseAwaitExpression() {
-            var node = createNode(184 /* AwaitExpression */);
-            nextToken();
-            node.expression = parseSimpleUnaryExpression();
-            return finishNode(node);
+        function isExportsOrModuleExportsOrAliasOrAssignemnt(node) {
+            return isExportsOrModuleExportsOrAlias(node) ||
+                (ts.isAssignmentExpression(node, /*excludeCompoundAssignements*/ true) && (isExportsOrModuleExportsOrAliasOrAssignemnt(node.left) || isExportsOrModuleExportsOrAliasOrAssignemnt(node.right)));
         }
-        /**
-         * Parse ES7 exponential expression and await expression
-         *
-         * ES7 ExponentiationExpression:
-         *      1) UnaryExpression[?Yield]
-         *      2) UpdateExpression[?Yield] ** ExponentiationExpression[?Yield]
-         *
-         */
-        function parseUnaryExpressionOrHigher() {
-            /**
-             * ES7 UpdateExpression:
-             *      1) LeftHandSideExpression[?Yield]
-             *      2) LeftHandSideExpression[?Yield][no LineTerminator here]++
-             *      3) LeftHandSideExpression[?Yield][no LineTerminator here]--
-             *      4) ++UnaryExpression[?Yield]
-             *      5) --UnaryExpression[?Yield]
-             */
-            if (isUpdateExpression()) {
-                var incrementExpression = parseIncrementExpression();
-                return token() === 38 /* AsteriskAsteriskToken */ ?
-                    parseBinaryExpressionRest(getBinaryOperatorPrecedence(), incrementExpression) :
-                    incrementExpression;
-            }
-            /**
-             * ES7 UnaryExpression:
-             *      1) UpdateExpression[?yield]
-             *      2) delete UpdateExpression[?yield]
-             *      3) void UpdateExpression[?yield]
-             *      4) typeof UpdateExpression[?yield]
-             *      5) + UpdateExpression[?yield]
-             *      6) - UpdateExpression[?yield]
-             *      7) ~ UpdateExpression[?yield]
-             *      8) ! UpdateExpression[?yield]
-             */
-            var unaryOperator = token();
-            var simpleUnaryExpression = parseSimpleUnaryExpression();
-            if (token() === 38 /* AsteriskAsteriskToken */) {
-                var start = ts.skipTrivia(sourceText, simpleUnaryExpression.pos);
-                if (simpleUnaryExpression.kind === 177 /* TypeAssertionExpression */) {
-                    parseErrorAtPosition(start, simpleUnaryExpression.end - start, ts.Diagnostics.A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses);
-                }
-                else {
-                    parseErrorAtPosition(start, simpleUnaryExpression.end - start, ts.Diagnostics.An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses, ts.tokenToString(unaryOperator));
-                }
+        function bindModuleExportsAssignment(node) {
+            // A common practice in node modules is to set 'export = module.exports = {}', this ensures that 'exports'
+            // is still pointing to 'module.exports'.
+            // We do not want to consider this as 'export=' since a module can have only one of these.
+            // Similarly we do not want to treat 'module.exports = exports' as an 'export='.
+            var assignedExpression = ts.getRightMostAssignedExpression(node.right);
+            if (ts.isEmptyObjectLiteral(assignedExpression) || isExportsOrModuleExportsOrAlias(assignedExpression)) {
+                // Mark it as a module in case there are no other exports in the file
+                setCommonJsModuleIndicator(node);
+                return;
             }
-            return simpleUnaryExpression;
+            // 'module.exports = expr' assignment
+            setCommonJsModuleIndicator(node);
+            declareSymbol(file.symbol.exports, file.symbol, node, 4 /* Property */ | 7340032 /* Export */ | 512 /* ValueModule */, 0 /* None */);
         }
-        /**
-         * Parse ES7 simple-unary expression or higher:
-         *
-         * ES7 UnaryExpression:
-         *      1) UpdateExpression[?yield]
-         *      2) delete UnaryExpression[?yield]
-         *      3) void UnaryExpression[?yield]
-         *      4) typeof UnaryExpression[?yield]
-         *      5) + UnaryExpression[?yield]
-         *      6) - UnaryExpression[?yield]
-         *      7) ~ UnaryExpression[?yield]
-         *      8) ! UnaryExpression[?yield]
-         *      9) [+Await] await UnaryExpression[?yield]
-         */
-        function parseSimpleUnaryExpression() {
-            switch (token()) {
-                case 35 /* PlusToken */:
-                case 36 /* MinusToken */:
-                case 50 /* TildeToken */:
-                case 49 /* ExclamationToken */:
-                    return parsePrefixUnaryExpression();
-                case 78 /* DeleteKeyword */:
-                    return parseDeleteExpression();
-                case 101 /* TypeOfKeyword */:
-                    return parseTypeOfExpression();
-                case 103 /* VoidKeyword */:
-                    return parseVoidExpression();
-                case 25 /* LessThanToken */:
-                    // This is modified UnaryExpression grammar in TypeScript
-                    //  UnaryExpression (modified):
-                    //      < type > UnaryExpression
-                    return parseTypeAssertion();
-                case 119 /* AwaitKeyword */:
-                    if (isAwaitExpression()) {
-                        return parseAwaitExpression();
+        function bindThisPropertyAssignment(node) {
+            ts.Debug.assert(ts.isInJavaScriptFile(node));
+            var container = ts.getThisContainer(node, /*includeArrowFunctions*/ false);
+            switch (container.kind) {
+                case 228 /* FunctionDeclaration */:
+                case 186 /* FunctionExpression */:
+                    // Declare a 'member' if the container is an ES5 class or ES6 constructor
+                    container.symbol.members = container.symbol.members || ts.createMap();
+                    // It's acceptable for multiple 'this' assignments of the same identifier to occur
+                    declareSymbol(container.symbol.members, container.symbol, node, 4 /* Property */, 0 /* PropertyExcludes */ & ~4 /* Property */);
+                    break;
+                case 152 /* Constructor */:
+                case 149 /* PropertyDeclaration */:
+                case 151 /* MethodDeclaration */:
+                case 153 /* GetAccessor */:
+                case 154 /* SetAccessor */:
+                    // this.foo assignment in a JavaScript class
+                    // Bind this property to the containing class
+                    var containingClass = container.parent;
+                    var symbol = declareSymbol(ts.hasModifier(container, 32 /* Static */) ? containingClass.symbol.exports : containingClass.symbol.members, containingClass.symbol, node, 4 /* Property */, 0 /* None */);
+                    if (symbol) {
+                        // symbols declared through 'this' property assignements can be overwritten by subsequent method declarations
+                        symbol.isReplaceableByMethod = true;
                     }
-                default:
-                    return parseIncrementExpression();
+                    break;
             }
         }
-        /**
-         * Check if the current token can possibly be an ES7 increment expression.
-         *
-         * ES7 UpdateExpression:
-         *      LeftHandSideExpression[?Yield]
-         *      LeftHandSideExpression[?Yield][no LineTerminator here]++
-         *      LeftHandSideExpression[?Yield][no LineTerminator here]--
-         *      ++LeftHandSideExpression[?Yield]
-         *      --LeftHandSideExpression[?Yield]
-         */
-        function isUpdateExpression() {
-            // This function is called inside parseUnaryExpression to decide
-            // whether to call parseSimpleUnaryExpression or call parseIncrementExpression directly
-            switch (token()) {
-                case 35 /* PlusToken */:
-                case 36 /* MinusToken */:
-                case 50 /* TildeToken */:
-                case 49 /* ExclamationToken */:
-                case 78 /* DeleteKeyword */:
-                case 101 /* TypeOfKeyword */:
-                case 103 /* VoidKeyword */:
-                case 119 /* AwaitKeyword */:
-                    return false;
-                case 25 /* LessThanToken */:
-                    // If we are not in JSX context, we are parsing TypeAssertion which is an UnaryExpression
-                    if (sourceFile.languageVariant !== 1 /* JSX */) {
-                        return false;
-                    }
-                // We are in JSX context and the token is part of JSXElement.
-                // Fall through
-                default:
-                    return true;
-            }
+        function bindPrototypePropertyAssignment(node) {
+            // We saw a node of the form 'x.prototype.y = z'. Declare a 'member' y on x if x was a function.
+            // Look up the function in the local scope, since prototype assignments should
+            // follow the function declaration
+            var leftSideOfAssignment = node.left;
+            var classPrototype = leftSideOfAssignment.expression;
+            var constructorFunction = classPrototype.expression;
+            // Fix up parent pointers since we're going to use these nodes before we bind into them
+            leftSideOfAssignment.parent = node;
+            constructorFunction.parent = classPrototype;
+            classPrototype.parent = leftSideOfAssignment;
+            bindPropertyAssignment(constructorFunction.text, leftSideOfAssignment, /*isPrototypeProperty*/ true);
         }
-        /**
-         * Parse ES7 IncrementExpression. IncrementExpression is used instead of ES6's PostFixExpression.
-         *
-         * ES7 IncrementExpression[yield]:
-         *      1) LeftHandSideExpression[?yield]
-         *      2) LeftHandSideExpression[?yield] [[no LineTerminator here]]++
-         *      3) LeftHandSideExpression[?yield] [[no LineTerminator here]]--
-         *      4) ++LeftHandSideExpression[?yield]
-         *      5) --LeftHandSideExpression[?yield]
-         * In TypeScript (2), (3) are parsed as PostfixUnaryExpression. (4), (5) are parsed as PrefixUnaryExpression
-         */
-        function parseIncrementExpression() {
-            if (token() === 41 /* PlusPlusToken */ || token() === 42 /* MinusMinusToken */) {
-                var node = createNode(185 /* PrefixUnaryExpression */);
-                node.operator = token();
-                nextToken();
-                node.operand = parseLeftHandSideExpressionOrHigher();
-                return finishNode(node);
-            }
-            else if (sourceFile.languageVariant === 1 /* JSX */ && token() === 25 /* LessThanToken */ && lookAhead(nextTokenIsIdentifierOrKeyword)) {
-                // JSXElement is part of primaryExpression
-                return parseJsxElementOrSelfClosingElement(/*inExpressionContext*/ true);
+        function bindStaticPropertyAssignment(node) {
+            // We saw a node of the form 'x.y = z'. Declare a 'member' y on x if x was a function.
+            // Look up the function in the local scope, since prototype assignments should
+            // follow the function declaration
+            var leftSideOfAssignment = node.left;
+            var target = leftSideOfAssignment.expression;
+            // Fix up parent pointers since we're going to use these nodes before we bind into them
+            leftSideOfAssignment.parent = node;
+            target.parent = leftSideOfAssignment;
+            if (isNameOfExportsOrModuleExportsAliasDeclaration(target)) {
+                // This can be an alias for the 'exports' or 'module.exports' names, e.g.
+                //    var util = module.exports;
+                //    util.property = function ...
+                bindExportsPropertyAssignment(node);
             }
-            var expression = parseLeftHandSideExpressionOrHigher();
-            ts.Debug.assert(ts.isLeftHandSideExpression(expression));
-            if ((token() === 41 /* PlusPlusToken */ || token() === 42 /* MinusMinusToken */) && !scanner.hasPrecedingLineBreak()) {
-                var node = createNode(186 /* PostfixUnaryExpression */, expression.pos);
-                node.operand = expression;
-                node.operator = token();
-                nextToken();
-                return finishNode(node);
+            else {
+                bindPropertyAssignment(target.text, leftSideOfAssignment, /*isPrototypeProperty*/ false);
             }
-            return expression;
-        }
-        function parseLeftHandSideExpressionOrHigher() {
-            // Original Ecma:
-            // LeftHandSideExpression: See 11.2
-            //      NewExpression
-            //      CallExpression
-            //
-            // Our simplification:
-            //
-            // LeftHandSideExpression: See 11.2
-            //      MemberExpression
-            //      CallExpression
-            //
-            // See comment in parseMemberExpressionOrHigher on how we replaced NewExpression with
-            // MemberExpression to make our lives easier.
-            //
-            // to best understand the below code, it's important to see how CallExpression expands
-            // out into its own productions:
-            //
-            // CallExpression:
-            //      MemberExpression Arguments
-            //      CallExpression Arguments
-            //      CallExpression[Expression]
-            //      CallExpression.IdentifierName
-            //      super   (   ArgumentListopt   )
-            //      super.IdentifierName
-            //
-            // Because of the recursion in these calls, we need to bottom out first.  There are two
-            // bottom out states we can run into.  Either we see 'super' which must start either of
-            // the last two CallExpression productions.  Or we have a MemberExpression which either
-            // completes the LeftHandSideExpression, or starts the beginning of the first four
-            // CallExpression productions.
-            var expression = token() === 95 /* SuperKeyword */
-                ? parseSuperExpression()
-                : parseMemberExpressionOrHigher();
-            // Now, we *may* be complete.  However, we might have consumed the start of a
-            // CallExpression.  As such, we need to consume the rest of it here to be complete.
-            return parseCallExpressionRest(expression);
-        }
-        function parseMemberExpressionOrHigher() {
-            // Note: to make our lives simpler, we decompose the the NewExpression productions and
-            // place ObjectCreationExpression and FunctionExpression into PrimaryExpression.
-            // like so:
-            //
-            //   PrimaryExpression : See 11.1
-            //      this
-            //      Identifier
-            //      Literal
-            //      ArrayLiteral
-            //      ObjectLiteral
-            //      (Expression)
-            //      FunctionExpression
-            //      new MemberExpression Arguments?
-            //
-            //   MemberExpression : See 11.2
-            //      PrimaryExpression
-            //      MemberExpression[Expression]
-            //      MemberExpression.IdentifierName
-            //
-            //   CallExpression : See 11.2
-            //      MemberExpression
-            //      CallExpression Arguments
-            //      CallExpression[Expression]
-            //      CallExpression.IdentifierName
-            //
-            // Technically this is ambiguous.  i.e. CallExpression defines:
-            //
-            //   CallExpression:
-            //      CallExpression Arguments
-            //
-            // If you see: "new Foo()"
-            //
-            // Then that could be treated as a single ObjectCreationExpression, or it could be
-            // treated as the invocation of "new Foo".  We disambiguate that in code (to match
-            // the original grammar) by making sure that if we see an ObjectCreationExpression
-            // we always consume arguments if they are there. So we treat "new Foo()" as an
-            // object creation only, and not at all as an invocation)  Another way to think
-            // about this is that for every "new" that we see, we will consume an argument list if
-            // it is there as part of the *associated* object creation node.  Any additional
-            // argument lists we see, will become invocation expressions.
-            //
-            // Because there are no other places in the grammar now that refer to FunctionExpression
-            // or ObjectCreationExpression, it is safe to push down into the PrimaryExpression
-            // production.
-            //
-            // Because CallExpression and MemberExpression are left recursive, we need to bottom out
-            // of the recursion immediately.  So we parse out a primary expression to start with.
-            var expression = parsePrimaryExpression();
-            return parseMemberExpressionRest(expression);
         }
-        function parseSuperExpression() {
-            var expression = parseTokenNode();
-            if (token() === 17 /* OpenParenToken */ || token() === 21 /* DotToken */ || token() === 19 /* OpenBracketToken */) {
-                return expression;
-            }
-            // If we have seen "super" it must be followed by '(' or '.'.
-            // If it wasn't then just try to parse out a '.' and report an error.
-            var node = createNode(172 /* PropertyAccessExpression */, expression.pos);
-            node.expression = expression;
-            parseExpectedToken(21 /* DotToken */, /*reportAtCurrentPosition*/ false, ts.Diagnostics.super_must_be_followed_by_an_argument_list_or_member_access);
-            node.name = parseRightSideOfDot(/*allowIdentifierNames*/ true);
-            return finishNode(node);
+        function lookupSymbolForName(name) {
+            return (container.symbol && container.symbol.exports && container.symbol.exports.get(name)) || (container.locals && container.locals.get(name));
         }
-        function tagNamesAreEquivalent(lhs, rhs) {
-            if (lhs.kind !== rhs.kind) {
-                return false;
+        function bindPropertyAssignment(functionName, propertyAccessExpression, isPrototypeProperty) {
+            var targetSymbol = lookupSymbolForName(functionName);
+            if (targetSymbol && ts.isDeclarationOfFunctionOrClassExpression(targetSymbol)) {
+                targetSymbol = targetSymbol.valueDeclaration.initializer.symbol;
             }
-            if (lhs.kind === 69 /* Identifier */) {
-                return lhs.text === rhs.text;
+            if (!targetSymbol || !(targetSymbol.flags & (16 /* Function */ | 32 /* Class */))) {
+                return;
             }
-            if (lhs.kind === 97 /* ThisKeyword */) {
-                return true;
+            // Set up the members collection if it doesn't exist already
+            var symbolTable = isPrototypeProperty ?
+                (targetSymbol.members || (targetSymbol.members = ts.createMap())) :
+                (targetSymbol.exports || (targetSymbol.exports = ts.createMap()));
+            // Declare the method/property
+            declareSymbol(symbolTable, targetSymbol, propertyAccessExpression, 4 /* Property */, 0 /* PropertyExcludes */);
+        }
+        function bindCallExpression(node) {
+            // We're only inspecting call expressions to detect CommonJS modules, so we can skip
+            // this check if we've already seen the module indicator
+            if (!file.commonJsModuleIndicator && ts.isRequireCall(node, /*checkArgumentIsStringLiteral*/ false)) {
+                setCommonJsModuleIndicator(node);
             }
-            // If we are at this statement then we must have PropertyAccessExpression and because tag name in Jsx element can only
-            // take forms of JsxTagNameExpression which includes an identifier, "this" expression, or another propertyAccessExpression
-            // it is safe to case the expression property as such. See parseJsxElementName for how we parse tag name in Jsx element
-            return lhs.name.text === rhs.name.text &&
-                tagNamesAreEquivalent(lhs.expression, rhs.expression);
         }
-        function parseJsxElementOrSelfClosingElement(inExpressionContext) {
-            var opening = parseJsxOpeningOrSelfClosingElement(inExpressionContext);
-            var result;
-            if (opening.kind === 243 /* JsxOpeningElement */) {
-                var node = createNode(241 /* JsxElement */, opening.pos);
-                node.openingElement = opening;
-                node.children = parseJsxChildren(node.openingElement.tagName);
-                node.closingElement = parseJsxClosingElement(inExpressionContext);
-                if (!tagNamesAreEquivalent(node.openingElement.tagName, node.closingElement.tagName)) {
-                    parseErrorAtPosition(node.closingElement.pos, node.closingElement.end - node.closingElement.pos, ts.Diagnostics.Expected_corresponding_JSX_closing_tag_for_0, ts.getTextOfNodeFromSourceText(sourceText, node.openingElement.tagName));
-                }
-                result = finishNode(node);
+        function bindClassLikeDeclaration(node) {
+            if (node.kind === 229 /* ClassDeclaration */) {
+                bindBlockScopedDeclaration(node, 32 /* Class */, 899519 /* ClassExcludes */);
             }
             else {
-                ts.Debug.assert(opening.kind === 242 /* JsxSelfClosingElement */);
-                // Nothing else to do for self-closing elements
-                result = opening;
-            }
-            // If the user writes the invalid code '<div></div><div></div>' in an expression context (i.e. not wrapped in
-            // an enclosing tag), we'll naively try to parse   ^ this as a 'less than' operator and the remainder of the tag
-            // as garbage, which will cause the formatter to badly mangle the JSX. Perform a speculative parse of a JSX
-            // element if we see a < token so that we can wrap it in a synthetic binary expression so the formatter
-            // does less damage and we can report a better error.
-            // Since JSX elements are invalid < operands anyway, this lookahead parse will only occur in error scenarios
-            // of one sort or another.
-            if (inExpressionContext && token() === 25 /* LessThanToken */) {
-                var invalidElement = tryParse(function () { return parseJsxElementOrSelfClosingElement(/*inExpressionContext*/ true); });
-                if (invalidElement) {
-                    parseErrorAtCurrentToken(ts.Diagnostics.JSX_expressions_must_have_one_parent_element);
-                    var badNode = createNode(187 /* BinaryExpression */, result.pos);
-                    badNode.end = invalidElement.end;
-                    badNode.left = result;
-                    badNode.right = invalidElement;
-                    badNode.operatorToken = createMissingNode(24 /* CommaToken */, /*reportAtCurrentPosition*/ false, /*diagnosticMessage*/ undefined);
-                    badNode.operatorToken.pos = badNode.operatorToken.end = badNode.right.pos;
-                    return badNode;
+                var bindingName = node.name ? node.name.text : "__class";
+                bindAnonymousDeclaration(node, 32 /* Class */, bindingName);
+                // Add name of class expression into the map for semantic classifier
+                if (node.name) {
+                    classifiableNames.set(node.name.text, node.name.text);
                 }
             }
-            return result;
-        }
-        function parseJsxText() {
-            var node = createNode(244 /* JsxText */, scanner.getStartPos());
-            currentToken = scanner.scanJsxToken();
-            return finishNode(node);
-        }
-        function parseJsxChild() {
-            switch (token()) {
-                case 244 /* JsxText */:
-                    return parseJsxText();
-                case 15 /* OpenBraceToken */:
-                    return parseJsxExpression(/*inExpressionContext*/ false);
-                case 25 /* LessThanToken */:
-                    return parseJsxElementOrSelfClosingElement(/*inExpressionContext*/ false);
-            }
-            ts.Debug.fail("Unknown JSX child kind " + token());
-        }
-        function parseJsxChildren(openingTagName) {
-            var result = createNodeArray();
-            var saveParsingContext = parsingContext;
-            parsingContext |= 1 << 14 /* JsxChildren */;
-            while (true) {
-                currentToken = scanner.reScanJsxToken();
-                if (token() === 26 /* LessThanSlashToken */) {
-                    // Closing tag
-                    break;
-                }
-                else if (token() === 1 /* EndOfFileToken */) {
-                    // If we hit EOF, issue the error at the tag that lacks the closing element
-                    // rather than at the end of the file (which is useless)
-                    parseErrorAtPosition(openingTagName.pos, openingTagName.end - openingTagName.pos, ts.Diagnostics.JSX_element_0_has_no_corresponding_closing_tag, ts.getTextOfNodeFromSourceText(sourceText, openingTagName));
-                    break;
+            var symbol = node.symbol;
+            // TypeScript 1.0 spec (April 2014): 8.4
+            // Every class automatically contains a static property member named 'prototype', the
+            // type of which is an instantiation of the class type with type Any supplied as a type
+            // argument for each type parameter. It is an error to explicitly declare a static
+            // property member with the name 'prototype'.
+            //
+            // Note: we check for this here because this class may be merging into a module.  The
+            // module might have an exported variable called 'prototype'.  We can't allow that as
+            // that would clash with the built-in 'prototype' for the class.
+            var prototypeSymbol = createSymbol(4 /* Property */ | 16777216 /* Prototype */, "prototype");
+            var symbolExport = symbol.exports.get(prototypeSymbol.name);
+            if (symbolExport) {
+                if (node.name) {
+                    node.name.parent = node;
                 }
-                result.push(parseJsxChild());
+                file.bindDiagnostics.push(ts.createDiagnosticForNode(symbolExport.declarations[0], ts.Diagnostics.Duplicate_identifier_0, prototypeSymbol.name));
             }
-            result.end = scanner.getTokenPos();
-            parsingContext = saveParsingContext;
-            return result;
+            symbol.exports.set(prototypeSymbol.name, prototypeSymbol);
+            prototypeSymbol.parent = symbol;
+        }
+        function bindEnumDeclaration(node) {
+            return ts.isConst(node)
+                ? bindBlockScopedDeclaration(node, 128 /* ConstEnum */, 899967 /* ConstEnumExcludes */)
+                : bindBlockScopedDeclaration(node, 256 /* RegularEnum */, 899327 /* RegularEnumExcludes */);
         }
-        function parseJsxOpeningOrSelfClosingElement(inExpressionContext) {
-            var fullStart = scanner.getStartPos();
-            parseExpected(25 /* LessThanToken */);
-            var tagName = parseJsxElementName();
-            var attributes = parseList(13 /* JsxAttributes */, parseJsxAttribute);
-            var node;
-            if (token() === 27 /* GreaterThanToken */) {
-                // Closing tag, so scan the immediately-following text with the JSX scanning instead
-                // of regular scanning to avoid treating illegal characters (e.g. '#') as immediate
-                // scanning errors
-                node = createNode(243 /* JsxOpeningElement */, fullStart);
-                scanJsxText();
+        function bindVariableDeclarationOrBindingElement(node) {
+            if (inStrictMode) {
+                checkStrictModeEvalOrArguments(node, node.name);
             }
-            else {
-                parseExpected(39 /* SlashToken */);
-                if (inExpressionContext) {
-                    parseExpected(27 /* GreaterThanToken */);
+            if (!ts.isBindingPattern(node.name)) {
+                if (ts.isBlockOrCatchScoped(node)) {
+                    bindBlockScopedVariableDeclaration(node);
+                }
+                else if (ts.isParameterDeclaration(node)) {
+                    // It is safe to walk up parent chain to find whether the node is a destructing parameter declaration
+                    // because its parent chain has already been set up, since parents are set before descending into children.
+                    //
+                    // If node is a binding element in parameter declaration, we need to use ParameterExcludes.
+                    // Using ParameterExcludes flag allows the compiler to report an error on duplicate identifiers in Parameter Declaration
+                    // For example:
+                    //      function foo([a,a]) {} // Duplicate Identifier error
+                    //      function bar(a,a) {}   // Duplicate Identifier error, parameter declaration in this case is handled in bindParameter
+                    //                             // which correctly set excluded symbols
+                    declareSymbolAndAddToSymbolTable(node, 1 /* FunctionScopedVariable */, 107455 /* ParameterExcludes */);
                 }
                 else {
-                    parseExpected(27 /* GreaterThanToken */, /*diagnostic*/ undefined, /*shouldAdvance*/ false);
-                    scanJsxText();
+                    declareSymbolAndAddToSymbolTable(node, 1 /* FunctionScopedVariable */, 107454 /* FunctionScopedVariableExcludes */);
                 }
-                node = createNode(242 /* JsxSelfClosingElement */, fullStart);
             }
-            node.tagName = tagName;
-            node.attributes = attributes;
-            return finishNode(node);
         }
-        function parseJsxElementName() {
-            scanJsxIdentifier();
-            // JsxElement can have name in the form of
-            //      propertyAccessExpression
-            //      primaryExpression in the form of an identifier and "this" keyword
-            // We can't just simply use parseLeftHandSideExpressionOrHigher because then we will start consider class,function etc as a keyword
-            // We only want to consider "this" as a primaryExpression
-            var expression = token() === 97 /* ThisKeyword */ ?
-                parseTokenNode() : parseIdentifierName();
-            while (parseOptional(21 /* DotToken */)) {
-                var propertyAccess = createNode(172 /* PropertyAccessExpression */, expression.pos);
-                propertyAccess.expression = expression;
-                propertyAccess.name = parseRightSideOfDot(/*allowIdentifierNames*/ true);
-                expression = finishNode(propertyAccess);
+        function bindParameter(node) {
+            if (inStrictMode && !ts.isInAmbientContext(node)) {
+                // It is a SyntaxError if the identifier eval or arguments appears within a FormalParameterList of a
+                // strict mode FunctionLikeDeclaration or FunctionExpression(13.1)
+                checkStrictModeEvalOrArguments(node, node.name);
+            }
+            if (ts.isBindingPattern(node.name)) {
+                bindAnonymousDeclaration(node, 1 /* FunctionScopedVariable */, getDestructuringParameterName(node));
+            }
+            else {
+                declareSymbolAndAddToSymbolTable(node, 1 /* FunctionScopedVariable */, 107455 /* ParameterExcludes */);
+            }
+            // If this is a property-parameter, then also declare the property symbol into the
+            // containing class.
+            if (ts.isParameterPropertyDeclaration(node)) {
+                var classDeclaration = node.parent.parent;
+                declareSymbol(classDeclaration.symbol.members, classDeclaration.symbol, node, 4 /* Property */ | (node.questionToken ? 67108864 /* Optional */ : 0 /* None */), 0 /* PropertyExcludes */);
             }
-            return expression;
         }
-        function parseJsxExpression(inExpressionContext) {
-            var node = createNode(248 /* JsxExpression */);
-            parseExpected(15 /* OpenBraceToken */);
-            if (token() !== 16 /* CloseBraceToken */) {
-                node.expression = parseAssignmentExpressionOrHigher();
+        function bindFunctionDeclaration(node) {
+            if (!file.isDeclarationFile && !ts.isInAmbientContext(node)) {
+                if (ts.isAsyncFunction(node)) {
+                    emitFlags |= 1024 /* HasAsyncFunctions */;
+                }
             }
-            if (inExpressionContext) {
-                parseExpected(16 /* CloseBraceToken */);
+            checkStrictModeFunctionName(node);
+            if (inStrictMode) {
+                checkStrictModeFunctionDeclaration(node);
+                bindBlockScopedDeclaration(node, 16 /* Function */, 106927 /* FunctionExcludes */);
             }
             else {
-                parseExpected(16 /* CloseBraceToken */, /*message*/ undefined, /*shouldAdvance*/ false);
-                scanJsxText();
+                declareSymbolAndAddToSymbolTable(node, 16 /* Function */, 106927 /* FunctionExcludes */);
             }
-            return finishNode(node);
         }
-        function parseJsxAttribute() {
-            if (token() === 15 /* OpenBraceToken */) {
-                return parseJsxSpreadAttribute();
-            }
-            scanJsxIdentifier();
-            var node = createNode(246 /* JsxAttribute */);
-            node.name = parseIdentifierName();
-            if (token() === 56 /* EqualsToken */) {
-                switch (scanJsxAttributeValue()) {
-                    case 9 /* StringLiteral */:
-                        node.initializer = parseLiteralNode();
-                        break;
-                    default:
-                        node.initializer = parseJsxExpression(/*inExpressionContext*/ true);
-                        break;
+        function bindFunctionExpression(node) {
+            if (!file.isDeclarationFile && !ts.isInAmbientContext(node)) {
+                if (ts.isAsyncFunction(node)) {
+                    emitFlags |= 1024 /* HasAsyncFunctions */;
                 }
             }
-            return finishNode(node);
-        }
-        function parseJsxSpreadAttribute() {
-            var node = createNode(247 /* JsxSpreadAttribute */);
-            parseExpected(15 /* OpenBraceToken */);
-            parseExpected(22 /* DotDotDotToken */);
-            node.expression = parseExpression();
-            parseExpected(16 /* CloseBraceToken */);
-            return finishNode(node);
+            if (currentFlow) {
+                node.flowNode = currentFlow;
+            }
+            checkStrictModeFunctionName(node);
+            var bindingName = node.name ? node.name.text : "__function";
+            return bindAnonymousDeclaration(node, 16 /* Function */, bindingName);
         }
-        function parseJsxClosingElement(inExpressionContext) {
-            var node = createNode(245 /* JsxClosingElement */);
-            parseExpected(26 /* LessThanSlashToken */);
-            node.tagName = parseJsxElementName();
-            if (inExpressionContext) {
-                parseExpected(27 /* GreaterThanToken */);
+        function bindPropertyOrMethodOrAccessor(node, symbolFlags, symbolExcludes) {
+            if (!file.isDeclarationFile && !ts.isInAmbientContext(node) && ts.isAsyncFunction(node)) {
+                emitFlags |= 1024 /* HasAsyncFunctions */;
             }
-            else {
-                parseExpected(27 /* GreaterThanToken */, /*diagnostic*/ undefined, /*shouldAdvance*/ false);
-                scanJsxText();
+            if (currentFlow && ts.isObjectLiteralOrClassExpressionMethod(node)) {
+                node.flowNode = currentFlow;
             }
-            return finishNode(node);
+            return ts.hasDynamicName(node)
+                ? bindAnonymousDeclaration(node, symbolFlags, "__computed")
+                : declareSymbolAndAddToSymbolTable(node, symbolFlags, symbolExcludes);
         }
-        function parseTypeAssertion() {
-            var node = createNode(177 /* TypeAssertionExpression */);
-            parseExpected(25 /* LessThanToken */);
-            node.type = parseType();
-            parseExpected(27 /* GreaterThanToken */);
-            node.expression = parseSimpleUnaryExpression();
-            return finishNode(node);
+        // reachability checks
+        function shouldReportErrorOnModuleDeclaration(node) {
+            var instanceState = getModuleInstanceState(node);
+            return instanceState === 1 /* Instantiated */ || (instanceState === 2 /* ConstEnumOnly */ && options.preserveConstEnums);
         }
-        function parseMemberExpressionRest(expression) {
-            while (true) {
-                var dotToken = parseOptionalToken(21 /* DotToken */);
-                if (dotToken) {
-                    var propertyAccess = createNode(172 /* PropertyAccessExpression */, expression.pos);
-                    propertyAccess.expression = expression;
-                    propertyAccess.name = parseRightSideOfDot(/*allowIdentifierNames*/ true);
-                    expression = finishNode(propertyAccess);
-                    continue;
-                }
-                if (token() === 49 /* ExclamationToken */ && !scanner.hasPrecedingLineBreak()) {
-                    nextToken();
-                    var nonNullExpression = createNode(196 /* NonNullExpression */, expression.pos);
-                    nonNullExpression.expression = expression;
-                    expression = finishNode(nonNullExpression);
-                    continue;
-                }
-                // when in the [Decorator] context, we do not parse ElementAccess as it could be part of a ComputedPropertyName
-                if (!inDecoratorContext() && parseOptional(19 /* OpenBracketToken */)) {
-                    var indexedAccess = createNode(173 /* ElementAccessExpression */, expression.pos);
-                    indexedAccess.expression = expression;
-                    // It's not uncommon for a user to write: "new Type[]".
-                    // Check for that common pattern and report a better error message.
-                    if (token() !== 20 /* CloseBracketToken */) {
-                        indexedAccess.argumentExpression = allowInAnd(parseExpression);
-                        if (indexedAccess.argumentExpression.kind === 9 /* StringLiteral */ || indexedAccess.argumentExpression.kind === 8 /* NumericLiteral */) {
-                            var literal = indexedAccess.argumentExpression;
-                            literal.text = internIdentifier(literal.text);
-                        }
-                    }
-                    parseExpected(20 /* CloseBracketToken */);
-                    expression = finishNode(indexedAccess);
-                    continue;
-                }
-                if (token() === 11 /* NoSubstitutionTemplateLiteral */ || token() === 12 /* TemplateHead */) {
-                    var tagExpression = createNode(176 /* TaggedTemplateExpression */, expression.pos);
-                    tagExpression.tag = expression;
-                    tagExpression.template = token() === 11 /* NoSubstitutionTemplateLiteral */
-                        ? parseLiteralNode()
-                        : parseTemplateExpression();
-                    expression = finishNode(tagExpression);
-                    continue;
-                }
-                return expression;
+        function checkUnreachable(node) {
+            if (!(currentFlow.flags & 1 /* Unreachable */)) {
+                return false;
             }
-        }
-        function parseCallExpressionRest(expression) {
-            while (true) {
-                expression = parseMemberExpressionRest(expression);
-                if (token() === 25 /* LessThanToken */) {
-                    // See if this is the start of a generic invocation.  If so, consume it and
-                    // keep checking for postfix expressions.  Otherwise, it's just a '<' that's
-                    // part of an arithmetic expression.  Break out so we consume it higher in the
-                    // stack.
-                    var typeArguments = tryParse(parseTypeArgumentsInExpression);
-                    if (!typeArguments) {
-                        return expression;
+            if (currentFlow === unreachableFlow) {
+                var reportError = 
+                // report error on all statements except empty ones
+                (ts.isStatementButNotDeclaration(node) && node.kind !== 209 /* EmptyStatement */) ||
+                    // report error on class declarations
+                    node.kind === 229 /* ClassDeclaration */ ||
+                    // report error on instantiated modules or const-enums only modules if preserveConstEnums is set
+                    (node.kind === 233 /* ModuleDeclaration */ && shouldReportErrorOnModuleDeclaration(node)) ||
+                    // report error on regular enums and const enums if preserveConstEnums is set
+                    (node.kind === 232 /* EnumDeclaration */ && (!ts.isConstEnumDeclaration(node) || options.preserveConstEnums));
+                if (reportError) {
+                    currentFlow = reportedUnreachableFlow;
+                    // unreachable code is reported if
+                    // - user has explicitly asked about it AND
+                    // - statement is in not ambient context (statements in ambient context is already an error
+                    //   so we should not report extras) AND
+                    //   - node is not variable statement OR
+                    //   - node is block scoped variable statement OR
+                    //   - node is not block scoped variable statement and at least one variable declaration has initializer
+                    //   Rationale: we don't want to report errors on non-initialized var's since they are hoisted
+                    //   On the other side we do want to report errors on non-initialized 'lets' because of TDZ
+                    var reportUnreachableCode = !options.allowUnreachableCode &&
+                        !ts.isInAmbientContext(node) &&
+                        (node.kind !== 208 /* VariableStatement */ ||
+                            ts.getCombinedNodeFlags(node.declarationList) & 3 /* BlockScoped */ ||
+                            ts.forEach(node.declarationList.declarations, function (d) { return d.initializer; }));
+                    if (reportUnreachableCode) {
+                        errorOnFirstToken(node, ts.Diagnostics.Unreachable_code_detected);
                     }
-                    var callExpr = createNode(174 /* CallExpression */, expression.pos);
-                    callExpr.expression = expression;
-                    callExpr.typeArguments = typeArguments;
-                    callExpr.arguments = parseArgumentList();
-                    expression = finishNode(callExpr);
-                    continue;
                 }
-                else if (token() === 17 /* OpenParenToken */) {
-                    var callExpr = createNode(174 /* CallExpression */, expression.pos);
-                    callExpr.expression = expression;
-                    callExpr.arguments = parseArgumentList();
-                    expression = finishNode(callExpr);
-                    continue;
-                }
-                return expression;
             }
+            return true;
         }
-        function parseArgumentList() {
-            parseExpected(17 /* OpenParenToken */);
-            var result = parseDelimitedList(11 /* ArgumentExpressions */, parseArgumentExpression);
-            parseExpected(18 /* CloseParenToken */);
-            return result;
+    }
+    /**
+     * Computes the transform flags for a node, given the transform flags of its subtree
+     *
+     * @param node The node to analyze
+     * @param subtreeFlags Transform flags computed for this node's subtree
+     */
+    function computeTransformFlagsForNode(node, subtreeFlags) {
+        var kind = node.kind;
+        switch (kind) {
+            case 181 /* CallExpression */:
+                return computeCallExpression(node, subtreeFlags);
+            case 182 /* NewExpression */:
+                return computeNewExpression(node, subtreeFlags);
+            case 233 /* ModuleDeclaration */:
+                return computeModuleDeclaration(node, subtreeFlags);
+            case 185 /* ParenthesizedExpression */:
+                return computeParenthesizedExpression(node, subtreeFlags);
+            case 194 /* BinaryExpression */:
+                return computeBinaryExpression(node, subtreeFlags);
+            case 210 /* ExpressionStatement */:
+                return computeExpressionStatement(node, subtreeFlags);
+            case 146 /* Parameter */:
+                return computeParameter(node, subtreeFlags);
+            case 187 /* ArrowFunction */:
+                return computeArrowFunction(node, subtreeFlags);
+            case 186 /* FunctionExpression */:
+                return computeFunctionExpression(node, subtreeFlags);
+            case 228 /* FunctionDeclaration */:
+                return computeFunctionDeclaration(node, subtreeFlags);
+            case 226 /* VariableDeclaration */:
+                return computeVariableDeclaration(node, subtreeFlags);
+            case 227 /* VariableDeclarationList */:
+                return computeVariableDeclarationList(node, subtreeFlags);
+            case 208 /* VariableStatement */:
+                return computeVariableStatement(node, subtreeFlags);
+            case 222 /* LabeledStatement */:
+                return computeLabeledStatement(node, subtreeFlags);
+            case 229 /* ClassDeclaration */:
+                return computeClassDeclaration(node, subtreeFlags);
+            case 199 /* ClassExpression */:
+                return computeClassExpression(node, subtreeFlags);
+            case 259 /* HeritageClause */:
+                return computeHeritageClause(node, subtreeFlags);
+            case 260 /* CatchClause */:
+                return computeCatchClause(node, subtreeFlags);
+            case 201 /* ExpressionWithTypeArguments */:
+                return computeExpressionWithTypeArguments(node, subtreeFlags);
+            case 152 /* Constructor */:
+                return computeConstructor(node, subtreeFlags);
+            case 149 /* PropertyDeclaration */:
+                return computePropertyDeclaration(node, subtreeFlags);
+            case 151 /* MethodDeclaration */:
+                return computeMethod(node, subtreeFlags);
+            case 153 /* GetAccessor */:
+            case 154 /* SetAccessor */:
+                return computeAccessor(node, subtreeFlags);
+            case 237 /* ImportEqualsDeclaration */:
+                return computeImportEquals(node, subtreeFlags);
+            case 179 /* PropertyAccessExpression */:
+                return computePropertyAccess(node, subtreeFlags);
+            default:
+                return computeOther(node, kind, subtreeFlags);
         }
-        function parseTypeArgumentsInExpression() {
-            if (!parseOptional(25 /* LessThanToken */)) {
-                return undefined;
-            }
-            var typeArguments = parseDelimitedList(18 /* TypeArguments */, parseType);
-            if (!parseExpected(27 /* GreaterThanToken */)) {
-                // If it doesn't have the closing >  then it's definitely not an type argument list.
-                return undefined;
-            }
-            // If we have a '<', then only parse this as a argument list if the type arguments
-            // are complete and we have an open paren.  if we don't, rewind and return nothing.
-            return typeArguments && canFollowTypeArgumentsInExpression()
-                ? typeArguments
-                : undefined;
+    }
+    ts.computeTransformFlagsForNode = computeTransformFlagsForNode;
+    function computeCallExpression(node, subtreeFlags) {
+        var transformFlags = subtreeFlags;
+        var expression = node.expression;
+        var expressionKind = expression.kind;
+        if (node.typeArguments) {
+            transformFlags |= 3 /* AssertTypeScript */;
         }
-        function canFollowTypeArgumentsInExpression() {
-            switch (token()) {
-                case 17 /* OpenParenToken */: // foo<x>(
-                // this case are the only case where this token can legally follow a type argument
-                // list.  So we definitely want to treat this as a type arg list.
-                case 21 /* DotToken */: // foo<x>.
-                case 18 /* CloseParenToken */: // foo<x>)
-                case 20 /* CloseBracketToken */: // foo<x>]
-                case 54 /* ColonToken */: // foo<x>:
-                case 23 /* SemicolonToken */: // foo<x>;
-                case 53 /* QuestionToken */: // foo<x>?
-                case 30 /* EqualsEqualsToken */: // foo<x> ==
-                case 32 /* EqualsEqualsEqualsToken */: // foo<x> ===
-                case 31 /* ExclamationEqualsToken */: // foo<x> !=
-                case 33 /* ExclamationEqualsEqualsToken */: // foo<x> !==
-                case 51 /* AmpersandAmpersandToken */: // foo<x> &&
-                case 52 /* BarBarToken */: // foo<x> ||
-                case 48 /* CaretToken */: // foo<x> ^
-                case 46 /* AmpersandToken */: // foo<x> &
-                case 47 /* BarToken */: // foo<x> |
-                case 16 /* CloseBraceToken */: // foo<x> }
-                case 1 /* EndOfFileToken */:
-                    // these cases can't legally follow a type arg list.  However, they're not legal
-                    // expressions either.  The user is probably in the middle of a generic type. So
-                    // treat it as such.
-                    return true;
-                case 24 /* CommaToken */: // foo<x>,
-                case 15 /* OpenBraceToken */: // foo<x> {
-                // We don't want to treat these as type arguments.  Otherwise we'll parse this
-                // as an invocation expression.  Instead, we want to parse out the expression
-                // in isolation from the type arguments.
-                default:
-                    // Anything else treat as an expression.
-                    return false;
-            }
+        if (subtreeFlags & 524288 /* ContainsSpread */
+            || isSuperOrSuperProperty(expression, expressionKind)) {
+            // If the this node contains a SpreadExpression, or is a super call, then it is an ES6
+            // node.
+            transformFlags |= 192 /* AssertES2015 */;
         }
-        function parsePrimaryExpression() {
-            switch (token()) {
-                case 8 /* NumericLiteral */:
-                case 9 /* StringLiteral */:
-                case 11 /* NoSubstitutionTemplateLiteral */:
-                    return parseLiteralNode();
-                case 97 /* ThisKeyword */:
-                case 95 /* SuperKeyword */:
-                case 93 /* NullKeyword */:
-                case 99 /* TrueKeyword */:
-                case 84 /* FalseKeyword */:
-                    return parseTokenNode();
-                case 17 /* OpenParenToken */:
-                    return parseParenthesizedExpression();
-                case 19 /* OpenBracketToken */:
-                    return parseArrayLiteralExpression();
-                case 15 /* OpenBraceToken */:
-                    return parseObjectLiteralExpression();
-                case 118 /* AsyncKeyword */:
-                    // Async arrow functions are parsed earlier in parseAssignmentExpressionOrHigher.
-                    // If we encounter `async [no LineTerminator here] function` then this is an async
-                    // function; otherwise, its an identifier.
-                    if (!lookAhead(nextTokenIsFunctionKeywordOnSameLine)) {
-                        break;
-                    }
-                    return parseFunctionExpression();
-                case 73 /* ClassKeyword */:
-                    return parseClassExpression();
-                case 87 /* FunctionKeyword */:
-                    return parseFunctionExpression();
-                case 92 /* NewKeyword */:
-                    return parseNewExpression();
-                case 39 /* SlashToken */:
-                case 61 /* SlashEqualsToken */:
-                    if (reScanSlashToken() === 10 /* RegularExpressionLiteral */) {
-                        return parseLiteralNode();
-                    }
-                    break;
-                case 12 /* TemplateHead */:
-                    return parseTemplateExpression();
-            }
-            return parseIdentifier(ts.Diagnostics.Expression_expected);
+        if (expression.kind === 91 /* ImportKeyword */) {
+            transformFlags |= 67108864 /* ContainsDynamicImport */;
         }
-        function parseParenthesizedExpression() {
-            var node = createNode(178 /* ParenthesizedExpression */);
-            parseExpected(17 /* OpenParenToken */);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(18 /* CloseParenToken */);
-            return finishNode(node);
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~537396545 /* ArrayLiteralOrCallOrNewExcludes */;
+    }
+    function isSuperOrSuperProperty(node, kind) {
+        switch (kind) {
+            case 97 /* SuperKeyword */:
+                return true;
+            case 179 /* PropertyAccessExpression */:
+            case 180 /* ElementAccessExpression */:
+                var expression = node.expression;
+                var expressionKind = expression.kind;
+                return expressionKind === 97 /* SuperKeyword */;
         }
-        function parseSpreadElement() {
-            var node = createNode(191 /* SpreadElementExpression */);
-            parseExpected(22 /* DotDotDotToken */);
-            node.expression = parseAssignmentExpressionOrHigher();
-            return finishNode(node);
+        return false;
+    }
+    function computeNewExpression(node, subtreeFlags) {
+        var transformFlags = subtreeFlags;
+        if (node.typeArguments) {
+            transformFlags |= 3 /* AssertTypeScript */;
         }
-        function parseArgumentOrArrayLiteralElement() {
-            return token() === 22 /* DotDotDotToken */ ? parseSpreadElement() :
-                token() === 24 /* CommaToken */ ? createNode(193 /* OmittedExpression */) :
-                    parseAssignmentExpressionOrHigher();
+        if (subtreeFlags & 524288 /* ContainsSpread */) {
+            // If the this node contains a SpreadElementExpression then it is an ES6
+            // node.
+            transformFlags |= 192 /* AssertES2015 */;
         }
-        function parseArgumentExpression() {
-            return doOutsideOfContext(disallowInAndDecoratorContext, parseArgumentOrArrayLiteralElement);
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~537396545 /* ArrayLiteralOrCallOrNewExcludes */;
+    }
+    function computeBinaryExpression(node, subtreeFlags) {
+        var transformFlags = subtreeFlags;
+        var operatorTokenKind = node.operatorToken.kind;
+        var leftKind = node.left.kind;
+        if (operatorTokenKind === 58 /* EqualsToken */ && leftKind === 178 /* ObjectLiteralExpression */) {
+            // Destructuring object assignments with are ES2015 syntax
+            // and possibly ESNext if they contain rest
+            transformFlags |= 8 /* AssertESNext */ | 192 /* AssertES2015 */ | 3072 /* AssertDestructuringAssignment */;
         }
-        function parseArrayLiteralExpression() {
-            var node = createNode(170 /* ArrayLiteralExpression */);
-            parseExpected(19 /* OpenBracketToken */);
-            if (scanner.hasPrecedingLineBreak()) {
-                node.multiLine = true;
-            }
-            node.elements = parseDelimitedList(15 /* ArrayLiteralMembers */, parseArgumentOrArrayLiteralElement);
-            parseExpected(20 /* CloseBracketToken */);
-            return finishNode(node);
+        else if (operatorTokenKind === 58 /* EqualsToken */ && leftKind === 177 /* ArrayLiteralExpression */) {
+            // Destructuring assignments are ES2015 syntax.
+            transformFlags |= 192 /* AssertES2015 */ | 3072 /* AssertDestructuringAssignment */;
         }
-        function tryParseAccessorDeclaration(fullStart, decorators, modifiers) {
-            if (parseContextualModifier(123 /* GetKeyword */)) {
-                return parseAccessorDeclaration(149 /* GetAccessor */, fullStart, decorators, modifiers);
-            }
-            else if (parseContextualModifier(131 /* SetKeyword */)) {
-                return parseAccessorDeclaration(150 /* SetAccessor */, fullStart, decorators, modifiers);
-            }
-            return undefined;
+        else if (operatorTokenKind === 40 /* AsteriskAsteriskToken */
+            || operatorTokenKind === 62 /* AsteriskAsteriskEqualsToken */) {
+            // Exponentiation is ES2016 syntax.
+            transformFlags |= 32 /* AssertES2016 */;
         }
-        function parseObjectLiteralElement() {
-            var fullStart = scanner.getStartPos();
-            var decorators = parseDecorators();
-            var modifiers = parseModifiers();
-            var accessor = tryParseAccessorDeclaration(fullStart, decorators, modifiers);
-            if (accessor) {
-                return accessor;
-            }
-            var asteriskToken = parseOptionalToken(37 /* AsteriskToken */);
-            var tokenIsIdentifier = isIdentifier();
-            var propertyName = parsePropertyName();
-            // Disallowing of optional property assignments happens in the grammar checker.
-            var questionToken = parseOptionalToken(53 /* QuestionToken */);
-            if (asteriskToken || token() === 17 /* OpenParenToken */ || token() === 25 /* LessThanToken */) {
-                return parseMethodDeclaration(fullStart, decorators, modifiers, asteriskToken, propertyName, questionToken);
-            }
-            // check if it is short-hand property assignment or normal property assignment
-            // NOTE: if token is EqualsToken it is interpreted as CoverInitializedName production
-            // CoverInitializedName[Yield] :
-            //     IdentifierReference[?Yield] Initializer[In, ?Yield]
-            // this is necessary because ObjectLiteral productions are also used to cover grammar for ObjectAssignmentPattern
-            var isShorthandPropertyAssignment = tokenIsIdentifier && (token() === 24 /* CommaToken */ || token() === 16 /* CloseBraceToken */ || token() === 56 /* EqualsToken */);
-            if (isShorthandPropertyAssignment) {
-                var shorthandDeclaration = createNode(254 /* ShorthandPropertyAssignment */, fullStart);
-                shorthandDeclaration.name = propertyName;
-                shorthandDeclaration.questionToken = questionToken;
-                var equalsToken = parseOptionalToken(56 /* EqualsToken */);
-                if (equalsToken) {
-                    shorthandDeclaration.equalsToken = equalsToken;
-                    shorthandDeclaration.objectAssignmentInitializer = allowInAnd(parseAssignmentExpressionOrHigher);
-                }
-                return addJSDocComment(finishNode(shorthandDeclaration));
-            }
-            else {
-                var propertyAssignment = createNode(253 /* PropertyAssignment */, fullStart);
-                propertyAssignment.modifiers = modifiers;
-                propertyAssignment.name = propertyName;
-                propertyAssignment.questionToken = questionToken;
-                parseExpected(54 /* ColonToken */);
-                propertyAssignment.initializer = allowInAnd(parseAssignmentExpressionOrHigher);
-                return addJSDocComment(finishNode(propertyAssignment));
-            }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~536872257 /* NodeExcludes */;
+    }
+    function computeParameter(node, subtreeFlags) {
+        var transformFlags = subtreeFlags;
+        var modifierFlags = ts.getModifierFlags(node);
+        var name = node.name;
+        var initializer = node.initializer;
+        var dotDotDotToken = node.dotDotDotToken;
+        // The '?' token, type annotations, decorators, and 'this' parameters are TypeSCript
+        // syntax.
+        if (node.questionToken
+            || node.type
+            || subtreeFlags & 4096 /* ContainsDecorators */
+            || ts.isThisIdentifier(name)) {
+            transformFlags |= 3 /* AssertTypeScript */;
         }
-        function parseObjectLiteralExpression() {
-            var node = createNode(171 /* ObjectLiteralExpression */);
-            parseExpected(15 /* OpenBraceToken */);
-            if (scanner.hasPrecedingLineBreak()) {
-                node.multiLine = true;
-            }
-            node.properties = parseDelimitedList(12 /* ObjectLiteralMembers */, parseObjectLiteralElement, /*considerSemicolonAsDelimiter*/ true);
-            parseExpected(16 /* CloseBraceToken */);
-            return finishNode(node);
+        // If a parameter has an accessibility modifier, then it is TypeScript syntax.
+        if (modifierFlags & 92 /* ParameterPropertyModifier */) {
+            transformFlags |= 3 /* AssertTypeScript */ | 262144 /* ContainsParameterPropertyAssignments */;
         }
-        function parseFunctionExpression() {
-            // GeneratorExpression:
-            //      function* BindingIdentifier [Yield][opt](FormalParameters[Yield]){ GeneratorBody }
-            //
-            // FunctionExpression:
-            //      function BindingIdentifier[opt](FormalParameters){ FunctionBody }
-            var saveDecoratorContext = inDecoratorContext();
-            if (saveDecoratorContext) {
-                setDecoratorContext(/*val*/ false);
+        // parameters with object rest destructuring are ES Next syntax
+        if (subtreeFlags & 1048576 /* ContainsObjectRest */) {
+            transformFlags |= 8 /* AssertESNext */;
+        }
+        // If a parameter has an initializer, a binding pattern or a dotDotDot token, then
+        // it is ES6 syntax and its container must emit default value assignments or parameter destructuring downlevel.
+        if (subtreeFlags & 8388608 /* ContainsBindingPattern */ || initializer || dotDotDotToken) {
+            transformFlags |= 192 /* AssertES2015 */ | 131072 /* ContainsDefaultValueAssignments */;
+        }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~536872257 /* ParameterExcludes */;
+    }
+    function computeParenthesizedExpression(node, subtreeFlags) {
+        var transformFlags = subtreeFlags;
+        var expression = node.expression;
+        var expressionKind = expression.kind;
+        var expressionTransformFlags = expression.transformFlags;
+        // If the node is synthesized, it means the emitter put the parentheses there,
+        // not the user. If we didn't want them, the emitter would not have put them
+        // there.
+        if (expressionKind === 202 /* AsExpression */
+            || expressionKind === 184 /* TypeAssertionExpression */) {
+            transformFlags |= 3 /* AssertTypeScript */;
+        }
+        // If the expression of a ParenthesizedExpression is a destructuring assignment,
+        // then the ParenthesizedExpression is a destructuring assignment.
+        if (expressionTransformFlags & 1024 /* DestructuringAssignment */) {
+            transformFlags |= 1024 /* DestructuringAssignment */;
+        }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~536872257 /* NodeExcludes */;
+    }
+    function computeClassDeclaration(node, subtreeFlags) {
+        var transformFlags;
+        var modifierFlags = ts.getModifierFlags(node);
+        if (modifierFlags & 2 /* Ambient */) {
+            // An ambient declaration is TypeScript syntax.
+            transformFlags = 3 /* AssertTypeScript */;
+        }
+        else {
+            // A ClassDeclaration is ES6 syntax.
+            transformFlags = subtreeFlags | 192 /* AssertES2015 */;
+            // A class with a parameter property assignment, property initializer, or decorator is
+            // TypeScript syntax.
+            // An exported declaration may be TypeScript syntax, but is handled by the visitor
+            // for a namespace declaration.
+            if ((subtreeFlags & 274432 /* TypeScriptClassSyntaxMask */)
+                || node.typeParameters) {
+                transformFlags |= 3 /* AssertTypeScript */;
             }
-            var node = createNode(179 /* FunctionExpression */);
-            node.modifiers = parseModifiers();
-            parseExpected(87 /* FunctionKeyword */);
-            node.asteriskToken = parseOptionalToken(37 /* AsteriskToken */);
-            var isGenerator = !!node.asteriskToken;
-            var isAsync = !!(ts.getModifierFlags(node) & 256 /* Async */);
-            node.name =
-                isGenerator && isAsync ? doInYieldAndAwaitContext(parseOptionalIdentifier) :
-                    isGenerator ? doInYieldContext(parseOptionalIdentifier) :
-                        isAsync ? doInAwaitContext(parseOptionalIdentifier) :
-                            parseOptionalIdentifier();
-            fillSignature(54 /* ColonToken */, /*yieldContext*/ isGenerator, /*awaitContext*/ isAsync, /*requireCompleteParameterList*/ false, node);
-            node.body = parseFunctionBlock(/*allowYield*/ isGenerator, /*allowAwait*/ isAsync, /*ignoreMissingOpenBrace*/ false);
-            if (saveDecoratorContext) {
-                setDecoratorContext(/*val*/ true);
+            if (subtreeFlags & 65536 /* ContainsLexicalThisInComputedPropertyName */) {
+                // A computed property name containing `this` might need to be rewritten,
+                // so propagate the ContainsLexicalThis flag upward.
+                transformFlags |= 16384 /* ContainsLexicalThis */;
             }
-            return addJSDocComment(finishNode(node));
         }
-        function parseOptionalIdentifier() {
-            return isIdentifier() ? parseIdentifier() : undefined;
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~539358529 /* ClassExcludes */;
+    }
+    function computeClassExpression(node, subtreeFlags) {
+        // A ClassExpression is ES6 syntax.
+        var transformFlags = subtreeFlags | 192 /* AssertES2015 */;
+        // A class with a parameter property assignment, property initializer, or decorator is
+        // TypeScript syntax.
+        if (subtreeFlags & 274432 /* TypeScriptClassSyntaxMask */
+            || node.typeParameters) {
+            transformFlags |= 3 /* AssertTypeScript */;
+        }
+        if (subtreeFlags & 65536 /* ContainsLexicalThisInComputedPropertyName */) {
+            // A computed property name containing `this` might need to be rewritten,
+            // so propagate the ContainsLexicalThis flag upward.
+            transformFlags |= 16384 /* ContainsLexicalThis */;
+        }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~539358529 /* ClassExcludes */;
+    }
+    function computeHeritageClause(node, subtreeFlags) {
+        var transformFlags = subtreeFlags;
+        switch (node.token) {
+            case 85 /* ExtendsKeyword */:
+                // An `extends` HeritageClause is ES6 syntax.
+                transformFlags |= 192 /* AssertES2015 */;
+                break;
+            case 108 /* ImplementsKeyword */:
+                // An `implements` HeritageClause is TypeScript syntax.
+                transformFlags |= 3 /* AssertTypeScript */;
+                break;
+            default:
+                ts.Debug.fail("Unexpected token for heritage clause");
+                break;
+        }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~536872257 /* NodeExcludes */;
+    }
+    function computeCatchClause(node, subtreeFlags) {
+        var transformFlags = subtreeFlags;
+        if (node.variableDeclaration && ts.isBindingPattern(node.variableDeclaration.name)) {
+            transformFlags |= 192 /* AssertES2015 */;
+        }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~537920833 /* CatchClauseExcludes */;
+    }
+    function computeExpressionWithTypeArguments(node, subtreeFlags) {
+        // An ExpressionWithTypeArguments is ES6 syntax, as it is used in the
+        // extends clause of a class.
+        var transformFlags = subtreeFlags | 192 /* AssertES2015 */;
+        // If an ExpressionWithTypeArguments contains type arguments, then it
+        // is TypeScript syntax.
+        if (node.typeArguments) {
+            transformFlags |= 3 /* AssertTypeScript */;
+        }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~536872257 /* NodeExcludes */;
+    }
+    function computeConstructor(node, subtreeFlags) {
+        var transformFlags = subtreeFlags;
+        // TypeScript-specific modifiers and overloads are TypeScript syntax
+        if (ts.hasModifier(node, 2270 /* TypeScriptModifier */)
+            || !node.body) {
+            transformFlags |= 3 /* AssertTypeScript */;
+        }
+        // function declarations with object rest destructuring are ES Next syntax
+        if (subtreeFlags & 1048576 /* ContainsObjectRest */) {
+            transformFlags |= 8 /* AssertESNext */;
+        }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~601015617 /* ConstructorExcludes */;
+    }
+    function computeMethod(node, subtreeFlags) {
+        // A MethodDeclaration is ES6 syntax.
+        var transformFlags = subtreeFlags | 192 /* AssertES2015 */;
+        // Decorators, TypeScript-specific modifiers, type parameters, type annotations, and
+        // overloads are TypeScript syntax.
+        if (node.decorators
+            || ts.hasModifier(node, 2270 /* TypeScriptModifier */)
+            || node.typeParameters
+            || node.type
+            || !node.body) {
+            transformFlags |= 3 /* AssertTypeScript */;
+        }
+        // function declarations with object rest destructuring are ES Next syntax
+        if (subtreeFlags & 1048576 /* ContainsObjectRest */) {
+            transformFlags |= 8 /* AssertESNext */;
+        }
+        // An async method declaration is ES2017 syntax.
+        if (ts.hasModifier(node, 256 /* Async */)) {
+            transformFlags |= node.asteriskToken ? 8 /* AssertESNext */ : 16 /* AssertES2017 */;
+        }
+        if (node.asteriskToken) {
+            transformFlags |= 768 /* AssertGenerator */;
+        }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~601015617 /* MethodOrAccessorExcludes */;
+    }
+    function computeAccessor(node, subtreeFlags) {
+        var transformFlags = subtreeFlags;
+        // Decorators, TypeScript-specific modifiers, type annotations, and overloads are
+        // TypeScript syntax.
+        if (node.decorators
+            || ts.hasModifier(node, 2270 /* TypeScriptModifier */)
+            || node.type
+            || !node.body) {
+            transformFlags |= 3 /* AssertTypeScript */;
+        }
+        // function declarations with object rest destructuring are ES Next syntax
+        if (subtreeFlags & 1048576 /* ContainsObjectRest */) {
+            transformFlags |= 8 /* AssertESNext */;
+        }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~601015617 /* MethodOrAccessorExcludes */;
+    }
+    function computePropertyDeclaration(node, subtreeFlags) {
+        // A PropertyDeclaration is TypeScript syntax.
+        var transformFlags = subtreeFlags | 3 /* AssertTypeScript */;
+        // If the PropertyDeclaration has an initializer, we need to inform its ancestor
+        // so that it handle the transformation.
+        if (node.initializer) {
+            transformFlags |= 8192 /* ContainsPropertyInitializer */;
+        }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~536872257 /* NodeExcludes */;
+    }
+    function computeFunctionDeclaration(node, subtreeFlags) {
+        var transformFlags;
+        var modifierFlags = ts.getModifierFlags(node);
+        var body = node.body;
+        if (!body || (modifierFlags & 2 /* Ambient */)) {
+            // An ambient declaration is TypeScript syntax.
+            // A FunctionDeclaration without a body is an overload and is TypeScript syntax.
+            transformFlags = 3 /* AssertTypeScript */;
         }
-        function parseNewExpression() {
-            var node = createNode(175 /* NewExpression */);
-            parseExpected(92 /* NewKeyword */);
-            node.expression = parseMemberExpressionOrHigher();
-            node.typeArguments = tryParse(parseTypeArgumentsInExpression);
-            if (node.typeArguments || token() === 17 /* OpenParenToken */) {
-                node.arguments = parseArgumentList();
+        else {
+            transformFlags = subtreeFlags | 33554432 /* ContainsHoistedDeclarationOrCompletion */;
+            // TypeScript-specific modifiers, type parameters, and type annotations are TypeScript
+            // syntax.
+            if (modifierFlags & 2270 /* TypeScriptModifier */
+                || node.typeParameters
+                || node.type) {
+                transformFlags |= 3 /* AssertTypeScript */;
             }
-            return finishNode(node);
-        }
-        // STATEMENTS
-        function parseBlock(ignoreMissingOpenBrace, diagnosticMessage) {
-            var node = createNode(199 /* Block */);
-            if (parseExpected(15 /* OpenBraceToken */, diagnosticMessage) || ignoreMissingOpenBrace) {
-                if (scanner.hasPrecedingLineBreak()) {
-                    node.multiLine = true;
-                }
-                node.statements = parseList(1 /* BlockStatements */, parseStatement);
-                parseExpected(16 /* CloseBraceToken */);
+            // An async function declaration is ES2017 syntax.
+            if (modifierFlags & 256 /* Async */) {
+                transformFlags |= node.asteriskToken ? 8 /* AssertESNext */ : 16 /* AssertES2017 */;
             }
-            else {
-                node.statements = createMissingList();
+            // function declarations with object rest destructuring are ES Next syntax
+            if (subtreeFlags & 1048576 /* ContainsObjectRest */) {
+                transformFlags |= 8 /* AssertESNext */;
             }
-            return finishNode(node);
-        }
-        function parseFunctionBlock(allowYield, allowAwait, ignoreMissingOpenBrace, diagnosticMessage) {
-            var savedYieldContext = inYieldContext();
-            setYieldContext(allowYield);
-            var savedAwaitContext = inAwaitContext();
-            setAwaitContext(allowAwait);
-            // We may be in a [Decorator] context when parsing a function expression or
-            // arrow function. The body of the function is not in [Decorator] context.
-            var saveDecoratorContext = inDecoratorContext();
-            if (saveDecoratorContext) {
-                setDecoratorContext(/*val*/ false);
+            // If a FunctionDeclaration's subtree has marked the container as needing to capture the
+            // lexical this, or the function contains parameters with initializers, then this node is
+            // ES6 syntax.
+            if (subtreeFlags & 163840 /* ES2015FunctionSyntaxMask */) {
+                transformFlags |= 192 /* AssertES2015 */;
             }
-            var block = parseBlock(ignoreMissingOpenBrace, diagnosticMessage);
-            if (saveDecoratorContext) {
-                setDecoratorContext(/*val*/ true);
+            // If a FunctionDeclaration is generator function and is the body of a
+            // transformed async function, then this node can be transformed to a
+            // down-level generator.
+            // Currently we do not support transforming any other generator fucntions
+            // down level.
+            if (node.asteriskToken) {
+                transformFlags |= 768 /* AssertGenerator */;
             }
-            setYieldContext(savedYieldContext);
-            setAwaitContext(savedAwaitContext);
-            return block;
         }
-        function parseEmptyStatement() {
-            var node = createNode(201 /* EmptyStatement */);
-            parseExpected(23 /* SemicolonToken */);
-            return finishNode(node);
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~601281857 /* FunctionExcludes */;
+    }
+    function computeFunctionExpression(node, subtreeFlags) {
+        var transformFlags = subtreeFlags;
+        // TypeScript-specific modifiers, type parameters, and type annotations are TypeScript
+        // syntax.
+        if (ts.hasModifier(node, 2270 /* TypeScriptModifier */)
+            || node.typeParameters
+            || node.type) {
+            transformFlags |= 3 /* AssertTypeScript */;
         }
-        function parseIfStatement() {
-            var node = createNode(203 /* IfStatement */);
-            parseExpected(88 /* IfKeyword */);
-            parseExpected(17 /* OpenParenToken */);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(18 /* CloseParenToken */);
-            node.thenStatement = parseStatement();
-            node.elseStatement = parseOptional(80 /* ElseKeyword */) ? parseStatement() : undefined;
-            return finishNode(node);
+        // An async function expression is ES2017 syntax.
+        if (ts.hasModifier(node, 256 /* Async */)) {
+            transformFlags |= node.asteriskToken ? 8 /* AssertESNext */ : 16 /* AssertES2017 */;
         }
-        function parseDoStatement() {
-            var node = createNode(204 /* DoStatement */);
-            parseExpected(79 /* DoKeyword */);
-            node.statement = parseStatement();
-            parseExpected(104 /* WhileKeyword */);
-            parseExpected(17 /* OpenParenToken */);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(18 /* CloseParenToken */);
-            // From: https://mail.mozilla.org/pipermail/es-discuss/2011-August/016188.html
-            // 157 min --- All allen at wirfs-brock.com CONF --- "do{;}while(false)false" prohibited in
-            // spec but allowed in consensus reality. Approved -- this is the de-facto standard whereby
-            //  do;while(0)x will have a semicolon inserted before x.
-            parseOptional(23 /* SemicolonToken */);
-            return finishNode(node);
+        // function expressions with object rest destructuring are ES Next syntax
+        if (subtreeFlags & 1048576 /* ContainsObjectRest */) {
+            transformFlags |= 8 /* AssertESNext */;
         }
-        function parseWhileStatement() {
-            var node = createNode(205 /* WhileStatement */);
-            parseExpected(104 /* WhileKeyword */);
-            parseExpected(17 /* OpenParenToken */);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(18 /* CloseParenToken */);
-            node.statement = parseStatement();
-            return finishNode(node);
+        // If a FunctionExpression's subtree has marked the container as needing to capture the
+        // lexical this, or the function contains parameters with initializers, then this node is
+        // ES6 syntax.
+        if (subtreeFlags & 163840 /* ES2015FunctionSyntaxMask */) {
+            transformFlags |= 192 /* AssertES2015 */;
         }
-        function parseForOrForInOrForOfStatement() {
-            var pos = getNodePos();
-            parseExpected(86 /* ForKeyword */);
-            parseExpected(17 /* OpenParenToken */);
-            var initializer = undefined;
-            if (token() !== 23 /* SemicolonToken */) {
-                if (token() === 102 /* VarKeyword */ || token() === 108 /* LetKeyword */ || token() === 74 /* ConstKeyword */) {
-                    initializer = parseVariableDeclarationList(/*inForStatementInitializer*/ true);
-                }
-                else {
-                    initializer = disallowInAnd(parseExpression);
-                }
-            }
-            var forOrForInOrForOfStatement;
-            if (parseOptional(90 /* InKeyword */)) {
-                var forInStatement = createNode(207 /* ForInStatement */, pos);
-                forInStatement.initializer = initializer;
-                forInStatement.expression = allowInAnd(parseExpression);
-                parseExpected(18 /* CloseParenToken */);
-                forOrForInOrForOfStatement = forInStatement;
-            }
-            else if (parseOptional(138 /* OfKeyword */)) {
-                var forOfStatement = createNode(208 /* ForOfStatement */, pos);
-                forOfStatement.initializer = initializer;
-                forOfStatement.expression = allowInAnd(parseAssignmentExpressionOrHigher);
-                parseExpected(18 /* CloseParenToken */);
-                forOrForInOrForOfStatement = forOfStatement;
-            }
-            else {
-                var forStatement = createNode(206 /* ForStatement */, pos);
-                forStatement.initializer = initializer;
-                parseExpected(23 /* SemicolonToken */);
-                if (token() !== 23 /* SemicolonToken */ && token() !== 18 /* CloseParenToken */) {
-                    forStatement.condition = allowInAnd(parseExpression);
-                }
-                parseExpected(23 /* SemicolonToken */);
-                if (token() !== 18 /* CloseParenToken */) {
-                    forStatement.incrementor = allowInAnd(parseExpression);
-                }
-                parseExpected(18 /* CloseParenToken */);
-                forOrForInOrForOfStatement = forStatement;
-            }
-            forOrForInOrForOfStatement.statement = parseStatement();
-            return finishNode(forOrForInOrForOfStatement);
+        // If a FunctionExpression is generator function and is the body of a
+        // transformed async function, then this node can be transformed to a
+        // down-level generator.
+        if (node.asteriskToken) {
+            transformFlags |= 768 /* AssertGenerator */;
         }
-        function parseBreakOrContinueStatement(kind) {
-            var node = createNode(kind);
-            parseExpected(kind === 210 /* BreakStatement */ ? 70 /* BreakKeyword */ : 75 /* ContinueKeyword */);
-            if (!canParseSemicolon()) {
-                node.label = parseIdentifier();
-            }
-            parseSemicolon();
-            return finishNode(node);
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~601281857 /* FunctionExcludes */;
+    }
+    function computeArrowFunction(node, subtreeFlags) {
+        // An ArrowFunction is ES6 syntax, and excludes markers that should not escape the scope of an ArrowFunction.
+        var transformFlags = subtreeFlags | 192 /* AssertES2015 */;
+        // TypeScript-specific modifiers, type parameters, and type annotations are TypeScript
+        // syntax.
+        if (ts.hasModifier(node, 2270 /* TypeScriptModifier */)
+            || node.typeParameters
+            || node.type) {
+            transformFlags |= 3 /* AssertTypeScript */;
         }
-        function parseReturnStatement() {
-            var node = createNode(211 /* ReturnStatement */);
-            parseExpected(94 /* ReturnKeyword */);
-            if (!canParseSemicolon()) {
-                node.expression = allowInAnd(parseExpression);
-            }
-            parseSemicolon();
-            return finishNode(node);
+        // An async arrow function is ES2017 syntax.
+        if (ts.hasModifier(node, 256 /* Async */)) {
+            transformFlags |= 16 /* AssertES2017 */;
         }
-        function parseWithStatement() {
-            var node = createNode(212 /* WithStatement */);
-            parseExpected(105 /* WithKeyword */);
-            parseExpected(17 /* OpenParenToken */);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(18 /* CloseParenToken */);
-            node.statement = parseStatement();
-            return finishNode(node);
+        // arrow functions with object rest destructuring are ES Next syntax
+        if (subtreeFlags & 1048576 /* ContainsObjectRest */) {
+            transformFlags |= 8 /* AssertESNext */;
         }
-        function parseCaseClause() {
-            var node = createNode(249 /* CaseClause */);
-            parseExpected(71 /* CaseKeyword */);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(54 /* ColonToken */);
-            node.statements = parseList(3 /* SwitchClauseStatements */, parseStatement);
-            return finishNode(node);
+        // If an ArrowFunction contains a lexical this, its container must capture the lexical this.
+        if (subtreeFlags & 16384 /* ContainsLexicalThis */) {
+            transformFlags |= 32768 /* ContainsCapturedLexicalThis */;
         }
-        function parseDefaultClause() {
-            var node = createNode(250 /* DefaultClause */);
-            parseExpected(77 /* DefaultKeyword */);
-            parseExpected(54 /* ColonToken */);
-            node.statements = parseList(3 /* SwitchClauseStatements */, parseStatement);
-            return finishNode(node);
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~601249089 /* ArrowFunctionExcludes */;
+    }
+    function computePropertyAccess(node, subtreeFlags) {
+        var transformFlags = subtreeFlags;
+        var expression = node.expression;
+        var expressionKind = expression.kind;
+        // If a PropertyAccessExpression starts with a super keyword, then it is
+        // ES6 syntax, and requires a lexical `this` binding.
+        if (expressionKind === 97 /* SuperKeyword */) {
+            transformFlags |= 16384 /* ContainsLexicalThis */;
         }
-        function parseCaseOrDefaultClause() {
-            return token() === 71 /* CaseKeyword */ ? parseCaseClause() : parseDefaultClause();
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~536872257 /* NodeExcludes */;
+    }
+    function computeVariableDeclaration(node, subtreeFlags) {
+        var transformFlags = subtreeFlags;
+        transformFlags |= 192 /* AssertES2015 */ | 8388608 /* ContainsBindingPattern */;
+        // A VariableDeclaration containing ObjectRest is ESNext syntax
+        if (subtreeFlags & 1048576 /* ContainsObjectRest */) {
+            transformFlags |= 8 /* AssertESNext */;
         }
-        function parseSwitchStatement() {
-            var node = createNode(213 /* SwitchStatement */);
-            parseExpected(96 /* SwitchKeyword */);
-            parseExpected(17 /* OpenParenToken */);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(18 /* CloseParenToken */);
-            var caseBlock = createNode(227 /* CaseBlock */, scanner.getStartPos());
-            parseExpected(15 /* OpenBraceToken */);
-            caseBlock.clauses = parseList(2 /* SwitchClauses */, parseCaseOrDefaultClause);
-            parseExpected(16 /* CloseBraceToken */);
-            node.caseBlock = finishNode(caseBlock);
-            return finishNode(node);
+        // Type annotations are TypeScript syntax.
+        if (node.type) {
+            transformFlags |= 3 /* AssertTypeScript */;
         }
-        function parseThrowStatement() {
-            // ThrowStatement[Yield] :
-            //      throw [no LineTerminator here]Expression[In, ?Yield];
-            // Because of automatic semicolon insertion, we need to report error if this
-            // throw could be terminated with a semicolon.  Note: we can't call 'parseExpression'
-            // directly as that might consume an expression on the following line.
-            // We just return 'undefined' in that case.  The actual error will be reported in the
-            // grammar walker.
-            var node = createNode(215 /* ThrowStatement */);
-            parseExpected(98 /* ThrowKeyword */);
-            node.expression = scanner.hasPrecedingLineBreak() ? undefined : allowInAnd(parseExpression);
-            parseSemicolon();
-            return finishNode(node);
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~536872257 /* NodeExcludes */;
+    }
+    function computeVariableStatement(node, subtreeFlags) {
+        var transformFlags;
+        var modifierFlags = ts.getModifierFlags(node);
+        var declarationListTransformFlags = node.declarationList.transformFlags;
+        // An ambient declaration is TypeScript syntax.
+        if (modifierFlags & 2 /* Ambient */) {
+            transformFlags = 3 /* AssertTypeScript */;
         }
-        // TODO: Review for error recovery
-        function parseTryStatement() {
-            var node = createNode(216 /* TryStatement */);
-            parseExpected(100 /* TryKeyword */);
-            node.tryBlock = parseBlock(/*ignoreMissingOpenBrace*/ false);
-            node.catchClause = token() === 72 /* CatchKeyword */ ? parseCatchClause() : undefined;
-            // If we don't have a catch clause, then we must have a finally clause.  Try to parse
-            // one out no matter what.
-            if (!node.catchClause || token() === 85 /* FinallyKeyword */) {
-                parseExpected(85 /* FinallyKeyword */);
-                node.finallyBlock = parseBlock(/*ignoreMissingOpenBrace*/ false);
+        else {
+            transformFlags = subtreeFlags;
+            if (declarationListTransformFlags & 8388608 /* ContainsBindingPattern */) {
+                transformFlags |= 192 /* AssertES2015 */;
             }
-            return finishNode(node);
         }
-        function parseCatchClause() {
-            var result = createNode(252 /* CatchClause */);
-            parseExpected(72 /* CatchKeyword */);
-            if (parseExpected(17 /* OpenParenToken */)) {
-                result.variableDeclaration = parseVariableDeclaration();
-            }
-            parseExpected(18 /* CloseParenToken */);
-            result.block = parseBlock(/*ignoreMissingOpenBrace*/ false);
-            return finishNode(result);
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~536872257 /* NodeExcludes */;
+    }
+    function computeLabeledStatement(node, subtreeFlags) {
+        var transformFlags = subtreeFlags;
+        // A labeled statement containing a block scoped binding *may* need to be transformed from ES6.
+        if (subtreeFlags & 4194304 /* ContainsBlockScopedBinding */
+            && ts.isIterationStatement(node, /*lookInLabeledStatements*/ true)) {
+            transformFlags |= 192 /* AssertES2015 */;
         }
-        function parseDebuggerStatement() {
-            var node = createNode(217 /* DebuggerStatement */);
-            parseExpected(76 /* DebuggerKeyword */);
-            parseSemicolon();
-            return finishNode(node);
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~536872257 /* NodeExcludes */;
+    }
+    function computeImportEquals(node, subtreeFlags) {
+        var transformFlags = subtreeFlags;
+        // An ImportEqualsDeclaration with a namespace reference is TypeScript.
+        if (!ts.isExternalModuleImportEqualsDeclaration(node)) {
+            transformFlags |= 3 /* AssertTypeScript */;
         }
-        function parseExpressionOrLabeledStatement() {
-            // Avoiding having to do the lookahead for a labeled statement by just trying to parse
-            // out an expression, seeing if it is identifier and then seeing if it is followed by
-            // a colon.
-            var fullStart = scanner.getStartPos();
-            var expression = allowInAnd(parseExpression);
-            if (expression.kind === 69 /* Identifier */ && parseOptional(54 /* ColonToken */)) {
-                var labeledStatement = createNode(214 /* LabeledStatement */, fullStart);
-                labeledStatement.label = expression;
-                labeledStatement.statement = parseStatement();
-                return addJSDocComment(finishNode(labeledStatement));
-            }
-            else {
-                var expressionStatement = createNode(202 /* ExpressionStatement */, fullStart);
-                expressionStatement.expression = expression;
-                parseSemicolon();
-                return addJSDocComment(finishNode(expressionStatement));
-            }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~536872257 /* NodeExcludes */;
+    }
+    function computeExpressionStatement(node, subtreeFlags) {
+        var transformFlags = subtreeFlags;
+        // If the expression of an expression statement is a destructuring assignment,
+        // then we treat the statement as ES6 so that we can indicate that we do not
+        // need to hold on to the right-hand side.
+        if (node.expression.transformFlags & 1024 /* DestructuringAssignment */) {
+            transformFlags |= 192 /* AssertES2015 */;
         }
-        function nextTokenIsIdentifierOrKeywordOnSameLine() {
-            nextToken();
-            return ts.tokenIsIdentifierOrKeyword(token()) && !scanner.hasPrecedingLineBreak();
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~536872257 /* NodeExcludes */;
+    }
+    function computeModuleDeclaration(node, subtreeFlags) {
+        var transformFlags = 3 /* AssertTypeScript */;
+        var modifierFlags = ts.getModifierFlags(node);
+        if ((modifierFlags & 2 /* Ambient */) === 0) {
+            transformFlags |= subtreeFlags;
         }
-        function nextTokenIsFunctionKeywordOnSameLine() {
-            nextToken();
-            return token() === 87 /* FunctionKeyword */ && !scanner.hasPrecedingLineBreak();
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~574674241 /* ModuleExcludes */;
+    }
+    function computeVariableDeclarationList(node, subtreeFlags) {
+        var transformFlags = subtreeFlags | 33554432 /* ContainsHoistedDeclarationOrCompletion */;
+        if (subtreeFlags & 8388608 /* ContainsBindingPattern */) {
+            transformFlags |= 192 /* AssertES2015 */;
         }
-        function nextTokenIsIdentifierOrKeywordOrNumberOnSameLine() {
-            nextToken();
-            return (ts.tokenIsIdentifierOrKeyword(token()) || token() === 8 /* NumericLiteral */) && !scanner.hasPrecedingLineBreak();
+        // If a VariableDeclarationList is `let` or `const`, then it is ES6 syntax.
+        if (node.flags & 3 /* BlockScoped */) {
+            transformFlags |= 192 /* AssertES2015 */ | 4194304 /* ContainsBlockScopedBinding */;
         }
-        function isDeclaration() {
-            while (true) {
-                switch (token()) {
-                    case 102 /* VarKeyword */:
-                    case 108 /* LetKeyword */:
-                    case 74 /* ConstKeyword */:
-                    case 87 /* FunctionKeyword */:
-                    case 73 /* ClassKeyword */:
-                    case 81 /* EnumKeyword */:
-                        return true;
-                    // 'declare', 'module', 'namespace', 'interface'* and 'type' are all legal JavaScript identifiers;
-                    // however, an identifier cannot be followed by another identifier on the same line. This is what we
-                    // count on to parse out the respective declarations. For instance, we exploit this to say that
-                    //
-                    //    namespace n
-                    //
-                    // can be none other than the beginning of a namespace declaration, but need to respect that JavaScript sees
-                    //
-                    //    namespace
-                    //    n
-                    //
-                    // as the identifier 'namespace' on one line followed by the identifier 'n' on another.
-                    // We need to look one token ahead to see if it permissible to try parsing a declaration.
-                    //
-                    // *Note*: 'interface' is actually a strict mode reserved word. So while
-                    //
-                    //   "use strict"
-                    //   interface
-                    //   I {}
-                    //
-                    // could be legal, it would add complexity for very little gain.
-                    case 107 /* InterfaceKeyword */:
-                    case 134 /* TypeKeyword */:
-                        return nextTokenIsIdentifierOnSameLine();
-                    case 125 /* ModuleKeyword */:
-                    case 126 /* NamespaceKeyword */:
-                        return nextTokenIsIdentifierOrStringLiteralOnSameLine();
-                    case 115 /* AbstractKeyword */:
-                    case 118 /* AsyncKeyword */:
-                    case 122 /* DeclareKeyword */:
-                    case 110 /* PrivateKeyword */:
-                    case 111 /* ProtectedKeyword */:
-                    case 112 /* PublicKeyword */:
-                    case 128 /* ReadonlyKeyword */:
-                        nextToken();
-                        // ASI takes effect for this modifier.
-                        if (scanner.hasPrecedingLineBreak()) {
-                            return false;
-                        }
-                        continue;
-                    case 137 /* GlobalKeyword */:
-                        nextToken();
-                        return token() === 15 /* OpenBraceToken */ || token() === 69 /* Identifier */ || token() === 82 /* ExportKeyword */;
-                    case 89 /* ImportKeyword */:
-                        nextToken();
-                        return token() === 9 /* StringLiteral */ || token() === 37 /* AsteriskToken */ ||
-                            token() === 15 /* OpenBraceToken */ || ts.tokenIsIdentifierOrKeyword(token());
-                    case 82 /* ExportKeyword */:
-                        nextToken();
-                        if (token() === 56 /* EqualsToken */ || token() === 37 /* AsteriskToken */ ||
-                            token() === 15 /* OpenBraceToken */ || token() === 77 /* DefaultKeyword */ ||
-                            token() === 116 /* AsKeyword */) {
-                            return true;
-                        }
-                        continue;
-                    case 113 /* StaticKeyword */:
-                        nextToken();
-                        continue;
-                    default:
-                        return false;
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~546309441 /* VariableDeclarationListExcludes */;
+    }
+    function computeOther(node, kind, subtreeFlags) {
+        // Mark transformations needed for each node
+        var transformFlags = subtreeFlags;
+        var excludeFlags = 536872257 /* NodeExcludes */;
+        switch (kind) {
+            case 120 /* AsyncKeyword */:
+            case 191 /* AwaitExpression */:
+                // async/await is ES2017 syntax, but may be ESNext syntax (for async generators)
+                transformFlags |= 8 /* AssertESNext */ | 16 /* AssertES2017 */;
+                break;
+            case 114 /* PublicKeyword */:
+            case 112 /* PrivateKeyword */:
+            case 113 /* ProtectedKeyword */:
+            case 117 /* AbstractKeyword */:
+            case 124 /* DeclareKeyword */:
+            case 76 /* ConstKeyword */:
+            case 232 /* EnumDeclaration */:
+            case 264 /* EnumMember */:
+            case 184 /* TypeAssertionExpression */:
+            case 202 /* AsExpression */:
+            case 203 /* NonNullExpression */:
+            case 131 /* ReadonlyKeyword */:
+                // These nodes are TypeScript syntax.
+                transformFlags |= 3 /* AssertTypeScript */;
+                break;
+            case 249 /* JsxElement */:
+            case 250 /* JsxSelfClosingElement */:
+            case 251 /* JsxOpeningElement */:
+            case 10 /* JsxText */:
+            case 252 /* JsxClosingElement */:
+            case 253 /* JsxAttribute */:
+            case 254 /* JsxAttributes */:
+            case 255 /* JsxSpreadAttribute */:
+            case 256 /* JsxExpression */:
+                // These nodes are Jsx syntax.
+                transformFlags |= 4 /* AssertJsx */;
+                break;
+            case 13 /* NoSubstitutionTemplateLiteral */:
+            case 14 /* TemplateHead */:
+            case 15 /* TemplateMiddle */:
+            case 16 /* TemplateTail */:
+            case 196 /* TemplateExpression */:
+            case 183 /* TaggedTemplateExpression */:
+            case 262 /* ShorthandPropertyAssignment */:
+            case 115 /* StaticKeyword */:
+            case 204 /* MetaProperty */:
+                // These nodes are ES6 syntax.
+                transformFlags |= 192 /* AssertES2015 */;
+                break;
+            case 9 /* StringLiteral */:
+                if (node.hasExtendedUnicodeEscape) {
+                    transformFlags |= 192 /* AssertES2015 */;
+                }
+                break;
+            case 8 /* NumericLiteral */:
+                if (node.numericLiteralFlags & 48 /* BinaryOrOctalSpecifier */) {
+                    transformFlags |= 192 /* AssertES2015 */;
+                }
+                break;
+            case 216 /* ForOfStatement */:
+                // This node is either ES2015 syntax or ES2017 syntax (if it is a for-await-of).
+                if (node.awaitModifier) {
+                    transformFlags |= 8 /* AssertESNext */;
+                }
+                transformFlags |= 192 /* AssertES2015 */;
+                break;
+            case 197 /* YieldExpression */:
+                // This node is either ES2015 syntax (in a generator) or ES2017 syntax (in an async
+                // generator).
+                transformFlags |= 8 /* AssertESNext */ | 192 /* AssertES2015 */ | 16777216 /* ContainsYield */;
+                break;
+            case 119 /* AnyKeyword */:
+            case 133 /* NumberKeyword */:
+            case 130 /* NeverKeyword */:
+            case 134 /* ObjectKeyword */:
+            case 136 /* StringKeyword */:
+            case 122 /* BooleanKeyword */:
+            case 137 /* SymbolKeyword */:
+            case 105 /* VoidKeyword */:
+            case 145 /* TypeParameter */:
+            case 148 /* PropertySignature */:
+            case 150 /* MethodSignature */:
+            case 155 /* CallSignature */:
+            case 156 /* ConstructSignature */:
+            case 157 /* IndexSignature */:
+            case 158 /* TypePredicate */:
+            case 159 /* TypeReference */:
+            case 160 /* FunctionType */:
+            case 161 /* ConstructorType */:
+            case 162 /* TypeQuery */:
+            case 163 /* TypeLiteral */:
+            case 164 /* ArrayType */:
+            case 165 /* TupleType */:
+            case 166 /* UnionType */:
+            case 167 /* IntersectionType */:
+            case 168 /* ParenthesizedType */:
+            case 230 /* InterfaceDeclaration */:
+            case 231 /* TypeAliasDeclaration */:
+            case 169 /* ThisType */:
+            case 170 /* TypeOperator */:
+            case 171 /* IndexedAccessType */:
+            case 172 /* MappedType */:
+            case 173 /* LiteralType */:
+            case 236 /* NamespaceExportDeclaration */:
+                // Types and signatures are TypeScript syntax, and exclude all other facts.
+                transformFlags = 3 /* AssertTypeScript */;
+                excludeFlags = -3 /* TypeExcludes */;
+                break;
+            case 144 /* ComputedPropertyName */:
+                // Even though computed property names are ES6, we don't treat them as such.
+                // This is so that they can flow through PropertyName transforms unaffected.
+                // Instead, we mark the container as ES6, so that it can properly handle the transform.
+                transformFlags |= 2097152 /* ContainsComputedPropertyName */;
+                if (subtreeFlags & 16384 /* ContainsLexicalThis */) {
+                    // A computed method name like `[this.getName()](x: string) { ... }` needs to
+                    // distinguish itself from the normal case of a method body containing `this`:
+                    // `this` inside a method doesn't need to be rewritten (the method provides `this`),
+                    // whereas `this` inside a computed name *might* need to be rewritten if the class/object
+                    // is inside an arrow function:
+                    // `_this = this; () => class K { [_this.getName()]() { ... } }`
+                    // To make this distinction, use ContainsLexicalThisInComputedPropertyName
+                    // instead of ContainsLexicalThis for computed property names
+                    transformFlags |= 65536 /* ContainsLexicalThisInComputedPropertyName */;
+                }
+                break;
+            case 198 /* SpreadElement */:
+                transformFlags |= 192 /* AssertES2015 */ | 524288 /* ContainsSpread */;
+                break;
+            case 263 /* SpreadAssignment */:
+                transformFlags |= 8 /* AssertESNext */ | 1048576 /* ContainsObjectSpread */;
+                break;
+            case 97 /* SuperKeyword */:
+                // This node is ES6 syntax.
+                transformFlags |= 192 /* AssertES2015 */;
+                break;
+            case 99 /* ThisKeyword */:
+                // Mark this node and its ancestors as containing a lexical `this` keyword.
+                transformFlags |= 16384 /* ContainsLexicalThis */;
+                break;
+            case 174 /* ObjectBindingPattern */:
+                transformFlags |= 192 /* AssertES2015 */ | 8388608 /* ContainsBindingPattern */;
+                if (subtreeFlags & 524288 /* ContainsRest */) {
+                    transformFlags |= 8 /* AssertESNext */ | 1048576 /* ContainsObjectRest */;
+                }
+                excludeFlags = 537396545 /* BindingPatternExcludes */;
+                break;
+            case 175 /* ArrayBindingPattern */:
+                transformFlags |= 192 /* AssertES2015 */ | 8388608 /* ContainsBindingPattern */;
+                excludeFlags = 537396545 /* BindingPatternExcludes */;
+                break;
+            case 176 /* BindingElement */:
+                transformFlags |= 192 /* AssertES2015 */;
+                if (node.dotDotDotToken) {
+                    transformFlags |= 524288 /* ContainsRest */;
+                }
+                break;
+            case 147 /* Decorator */:
+                // This node is TypeScript syntax, and marks its container as also being TypeScript syntax.
+                transformFlags |= 3 /* AssertTypeScript */ | 4096 /* ContainsDecorators */;
+                break;
+            case 178 /* ObjectLiteralExpression */:
+                excludeFlags = 540087617 /* ObjectLiteralExcludes */;
+                if (subtreeFlags & 2097152 /* ContainsComputedPropertyName */) {
+                    // If an ObjectLiteralExpression contains a ComputedPropertyName, then it
+                    // is an ES6 node.
+                    transformFlags |= 192 /* AssertES2015 */;
+                }
+                if (subtreeFlags & 65536 /* ContainsLexicalThisInComputedPropertyName */) {
+                    // A computed property name containing `this` might need to be rewritten,
+                    // so propagate the ContainsLexicalThis flag upward.
+                    transformFlags |= 16384 /* ContainsLexicalThis */;
+                }
+                if (subtreeFlags & 1048576 /* ContainsObjectSpread */) {
+                    // If an ObjectLiteralExpression contains a spread element, then it
+                    // is an ES next node.
+                    transformFlags |= 8 /* AssertESNext */;
+                }
+                break;
+            case 177 /* ArrayLiteralExpression */:
+            case 182 /* NewExpression */:
+                excludeFlags = 537396545 /* ArrayLiteralOrCallOrNewExcludes */;
+                if (subtreeFlags & 524288 /* ContainsSpread */) {
+                    // If the this node contains a SpreadExpression, then it is an ES6
+                    // node.
+                    transformFlags |= 192 /* AssertES2015 */;
+                }
+                break;
+            case 212 /* DoStatement */:
+            case 213 /* WhileStatement */:
+            case 214 /* ForStatement */:
+            case 215 /* ForInStatement */:
+                // A loop containing a block scoped binding *may* need to be transformed from ES6.
+                if (subtreeFlags & 4194304 /* ContainsBlockScopedBinding */) {
+                    transformFlags |= 192 /* AssertES2015 */;
+                }
+                break;
+            case 265 /* SourceFile */:
+                if (subtreeFlags & 32768 /* ContainsCapturedLexicalThis */) {
+                    transformFlags |= 192 /* AssertES2015 */;
+                }
+                break;
+            case 219 /* ReturnStatement */:
+            case 217 /* ContinueStatement */:
+            case 218 /* BreakStatement */:
+                transformFlags |= 33554432 /* ContainsHoistedDeclarationOrCompletion */;
+                break;
+        }
+        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
+        return transformFlags & ~excludeFlags;
+    }
+    /**
+     * Gets the transform flags to exclude when unioning the transform flags of a subtree.
+     *
+     * NOTE: This needs to be kept up-to-date with the exclusions used in `computeTransformFlagsForNode`.
+     *       For performance reasons, `computeTransformFlagsForNode` uses local constant values rather
+     *       than calling this function.
+     */
+    /* @internal */
+    function getTransformFlagsSubtreeExclusions(kind) {
+        if (kind >= 158 /* FirstTypeNode */ && kind <= 173 /* LastTypeNode */) {
+            return -3 /* TypeExcludes */;
+        }
+        switch (kind) {
+            case 181 /* CallExpression */:
+            case 182 /* NewExpression */:
+            case 177 /* ArrayLiteralExpression */:
+                return 537396545 /* ArrayLiteralOrCallOrNewExcludes */;
+            case 233 /* ModuleDeclaration */:
+                return 574674241 /* ModuleExcludes */;
+            case 146 /* Parameter */:
+                return 536872257 /* ParameterExcludes */;
+            case 187 /* ArrowFunction */:
+                return 601249089 /* ArrowFunctionExcludes */;
+            case 186 /* FunctionExpression */:
+            case 228 /* FunctionDeclaration */:
+                return 601281857 /* FunctionExcludes */;
+            case 227 /* VariableDeclarationList */:
+                return 546309441 /* VariableDeclarationListExcludes */;
+            case 229 /* ClassDeclaration */:
+            case 199 /* ClassExpression */:
+                return 539358529 /* ClassExcludes */;
+            case 152 /* Constructor */:
+                return 601015617 /* ConstructorExcludes */;
+            case 151 /* MethodDeclaration */:
+            case 153 /* GetAccessor */:
+            case 154 /* SetAccessor */:
+                return 601015617 /* MethodOrAccessorExcludes */;
+            case 119 /* AnyKeyword */:
+            case 133 /* NumberKeyword */:
+            case 130 /* NeverKeyword */:
+            case 136 /* StringKeyword */:
+            case 134 /* ObjectKeyword */:
+            case 122 /* BooleanKeyword */:
+            case 137 /* SymbolKeyword */:
+            case 105 /* VoidKeyword */:
+            case 145 /* TypeParameter */:
+            case 148 /* PropertySignature */:
+            case 150 /* MethodSignature */:
+            case 155 /* CallSignature */:
+            case 156 /* ConstructSignature */:
+            case 157 /* IndexSignature */:
+            case 230 /* InterfaceDeclaration */:
+            case 231 /* TypeAliasDeclaration */:
+                return -3 /* TypeExcludes */;
+            case 178 /* ObjectLiteralExpression */:
+                return 540087617 /* ObjectLiteralExcludes */;
+            case 260 /* CatchClause */:
+                return 537920833 /* CatchClauseExcludes */;
+            case 174 /* ObjectBindingPattern */:
+            case 175 /* ArrayBindingPattern */:
+                return 537396545 /* BindingPatternExcludes */;
+            default:
+                return 536872257 /* NodeExcludes */;
+        }
+    }
+    ts.getTransformFlagsSubtreeExclusions = getTransformFlagsSubtreeExclusions;
+    /**
+     * "Binds" JSDoc nodes in TypeScript code.
+     * Since we will never create symbols for JSDoc, we just set parent pointers instead.
+     */
+    function setParentPointers(parent, child) {
+        child.parent = parent;
+        ts.forEachChild(child, function (childsChild) { return setParentPointers(child, childsChild); });
+    }
+})(ts || (ts = {}));
+/// <reference path="core.ts" />
+/// <reference path="diagnosticInformationMap.generated.ts" />
+var ts;
+(function (ts) {
+    function trace(host) {
+        host.trace(ts.formatMessage.apply(undefined, arguments));
+    }
+    ts.trace = trace;
+    /* @internal */
+    function isTraceEnabled(compilerOptions, host) {
+        return compilerOptions.traceResolution && host.trace !== undefined;
+    }
+    ts.isTraceEnabled = isTraceEnabled;
+    /**
+     * Kinds of file that we are currently looking for.
+     * Typically there is one pass with Extensions.TypeScript, then a second pass with Extensions.JavaScript.
+     */
+    var Extensions;
+    (function (Extensions) {
+        Extensions[Extensions["TypeScript"] = 0] = "TypeScript";
+        Extensions[Extensions["JavaScript"] = 1] = "JavaScript";
+        Extensions[Extensions["DtsOnly"] = 2] = "DtsOnly"; /** Only '.d.ts' */
+    })(Extensions || (Extensions = {}));
+    /** Used with `Extensions.DtsOnly` to extract the path from TypeScript results. */
+    function resolvedTypeScriptOnly(resolved) {
+        if (!resolved) {
+            return undefined;
+        }
+        ts.Debug.assert(ts.extensionIsTypeScript(resolved.extension));
+        return resolved.path;
+    }
+    function createResolvedModuleWithFailedLookupLocations(resolved, isExternalLibraryImport, failedLookupLocations) {
+        return {
+            resolvedModule: resolved && { resolvedFileName: resolved.path, extension: resolved.extension, isExternalLibraryImport: isExternalLibraryImport },
+            failedLookupLocations: failedLookupLocations
+        };
+    }
+    function moduleHasNonRelativeName(moduleName) {
+        return !(ts.isRootedDiskPath(moduleName) || ts.isExternalModuleNameRelative(moduleName));
+    }
+    ts.moduleHasNonRelativeName = moduleHasNonRelativeName;
+    /** Reads from "main" or "types"/"typings" depending on `extensions`. */
+    function tryReadPackageJsonFields(readTypes, packageJsonPath, baseDirectory, state) {
+        var jsonContent = readJson(packageJsonPath, state.host);
+        return readTypes ? tryReadFromField("typings") || tryReadFromField("types") : tryReadFromField("main");
+        function tryReadFromField(fieldName) {
+            if (!ts.hasProperty(jsonContent, fieldName)) {
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.package_json_does_not_have_a_0_field, fieldName);
+                }
+                return;
+            }
+            var fileName = jsonContent[fieldName];
+            if (typeof fileName !== "string") {
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.Expected_type_of_0_field_in_package_json_to_be_string_got_1, fieldName, typeof fileName);
                 }
+                return;
+            }
+            var path = ts.normalizePath(ts.combinePaths(baseDirectory, fileName));
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.package_json_has_0_field_1_that_references_2, fieldName, fileName, path);
             }
+            return path;
         }
-        function isStartOfDeclaration() {
-            return lookAhead(isDeclaration);
+    }
+    function readJson(path, host) {
+        try {
+            var jsonText = host.readFile(path);
+            return jsonText ? JSON.parse(jsonText) : {};
         }
-        function isStartOfStatement() {
-            switch (token()) {
-                case 55 /* AtToken */:
-                case 23 /* SemicolonToken */:
-                case 15 /* OpenBraceToken */:
-                case 102 /* VarKeyword */:
-                case 108 /* LetKeyword */:
-                case 87 /* FunctionKeyword */:
-                case 73 /* ClassKeyword */:
-                case 81 /* EnumKeyword */:
-                case 88 /* IfKeyword */:
-                case 79 /* DoKeyword */:
-                case 104 /* WhileKeyword */:
-                case 86 /* ForKeyword */:
-                case 75 /* ContinueKeyword */:
-                case 70 /* BreakKeyword */:
-                case 94 /* ReturnKeyword */:
-                case 105 /* WithKeyword */:
-                case 96 /* SwitchKeyword */:
-                case 98 /* ThrowKeyword */:
-                case 100 /* TryKeyword */:
-                case 76 /* DebuggerKeyword */:
-                // 'catch' and 'finally' do not actually indicate that the code is part of a statement,
-                // however, we say they are here so that we may gracefully parse them and error later.
-                case 72 /* CatchKeyword */:
-                case 85 /* FinallyKeyword */:
-                    return true;
-                case 74 /* ConstKeyword */:
-                case 82 /* ExportKeyword */:
-                case 89 /* ImportKeyword */:
-                    return isStartOfDeclaration();
-                case 118 /* AsyncKeyword */:
-                case 122 /* DeclareKeyword */:
-                case 107 /* InterfaceKeyword */:
-                case 125 /* ModuleKeyword */:
-                case 126 /* NamespaceKeyword */:
-                case 134 /* TypeKeyword */:
-                case 137 /* GlobalKeyword */:
-                    // When these don't start a declaration, they're an identifier in an expression statement
-                    return true;
-                case 112 /* PublicKeyword */:
-                case 110 /* PrivateKeyword */:
-                case 111 /* ProtectedKeyword */:
-                case 113 /* StaticKeyword */:
-                case 128 /* ReadonlyKeyword */:
-                    // When these don't start a declaration, they may be the start of a class member if an identifier
-                    // immediately follows. Otherwise they're an identifier in an expression statement.
-                    return isStartOfDeclaration() || !lookAhead(nextTokenIsIdentifierOrKeywordOnSameLine);
-                default:
-                    return isStartOfExpression();
+        catch (e) {
+            // gracefully handle if readFile fails or returns not JSON
+            return {};
+        }
+    }
+    function getEffectiveTypeRoots(options, host) {
+        if (options.typeRoots) {
+            return options.typeRoots;
+        }
+        var currentDirectory;
+        if (options.configFilePath) {
+            currentDirectory = ts.getDirectoryPath(options.configFilePath);
+        }
+        else if (host.getCurrentDirectory) {
+            currentDirectory = host.getCurrentDirectory();
+        }
+        if (currentDirectory !== undefined) {
+            return getDefaultTypeRoots(currentDirectory, host);
+        }
+    }
+    ts.getEffectiveTypeRoots = getEffectiveTypeRoots;
+    /**
+     * Returns the path to every node_modules/@types directory from some ancestor directory.
+     * Returns undefined if there are none.
+     */
+    function getDefaultTypeRoots(currentDirectory, host) {
+        if (!host.directoryExists) {
+            return [ts.combinePaths(currentDirectory, nodeModulesAtTypes)];
+            // And if it doesn't exist, tough.
+        }
+        var typeRoots;
+        forEachAncestorDirectory(ts.normalizePath(currentDirectory), function (directory) {
+            var atTypes = ts.combinePaths(directory, nodeModulesAtTypes);
+            if (host.directoryExists(atTypes)) {
+                (typeRoots || (typeRoots = [])).push(atTypes);
+            }
+            return undefined;
+        });
+        return typeRoots;
+    }
+    var nodeModulesAtTypes = ts.combinePaths("node_modules", "@types");
+    /**
+     * @param {string | undefined} containingFile - file that contains type reference directive, can be undefined if containing file is unknown.
+     * This is possible in case if resolution is performed for directives specified via 'types' parameter. In this case initial path for secondary lookups
+     * is assumed to be the same as root directory of the project.
+     */
+    function resolveTypeReferenceDirective(typeReferenceDirectiveName, containingFile, options, host) {
+        var traceEnabled = isTraceEnabled(options, host);
+        var moduleResolutionState = {
+            compilerOptions: options,
+            host: host,
+            traceEnabled: traceEnabled
+        };
+        var typeRoots = getEffectiveTypeRoots(options, host);
+        if (traceEnabled) {
+            if (containingFile === undefined) {
+                if (typeRoots === undefined) {
+                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set, typeReferenceDirectiveName);
+                }
+                else {
+                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1, typeReferenceDirectiveName, typeRoots);
+                }
+            }
+            else {
+                if (typeRoots === undefined) {
+                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set, typeReferenceDirectiveName, containingFile);
+                }
+                else {
+                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_1_root_directory_2, typeReferenceDirectiveName, containingFile, typeRoots);
+                }
             }
         }
-        function nextTokenIsIdentifierOrStartOfDestructuring() {
-            nextToken();
-            return isIdentifier() || token() === 15 /* OpenBraceToken */ || token() === 19 /* OpenBracketToken */;
-        }
-        function isLetDeclaration() {
-            // In ES6 'let' always starts a lexical declaration if followed by an identifier or {
-            // or [.
-            return lookAhead(nextTokenIsIdentifierOrStartOfDestructuring);
-        }
-        function parseStatement() {
-            switch (token()) {
-                case 23 /* SemicolonToken */:
-                    return parseEmptyStatement();
-                case 15 /* OpenBraceToken */:
-                    return parseBlock(/*ignoreMissingOpenBrace*/ false);
-                case 102 /* VarKeyword */:
-                    return parseVariableStatement(scanner.getStartPos(), /*decorators*/ undefined, /*modifiers*/ undefined);
-                case 108 /* LetKeyword */:
-                    if (isLetDeclaration()) {
-                        return parseVariableStatement(scanner.getStartPos(), /*decorators*/ undefined, /*modifiers*/ undefined);
-                    }
-                    break;
-                case 87 /* FunctionKeyword */:
-                    return parseFunctionDeclaration(scanner.getStartPos(), /*decorators*/ undefined, /*modifiers*/ undefined);
-                case 73 /* ClassKeyword */:
-                    return parseClassDeclaration(scanner.getStartPos(), /*decorators*/ undefined, /*modifiers*/ undefined);
-                case 88 /* IfKeyword */:
-                    return parseIfStatement();
-                case 79 /* DoKeyword */:
-                    return parseDoStatement();
-                case 104 /* WhileKeyword */:
-                    return parseWhileStatement();
-                case 86 /* ForKeyword */:
-                    return parseForOrForInOrForOfStatement();
-                case 75 /* ContinueKeyword */:
-                    return parseBreakOrContinueStatement(209 /* ContinueStatement */);
-                case 70 /* BreakKeyword */:
-                    return parseBreakOrContinueStatement(210 /* BreakStatement */);
-                case 94 /* ReturnKeyword */:
-                    return parseReturnStatement();
-                case 105 /* WithKeyword */:
-                    return parseWithStatement();
-                case 96 /* SwitchKeyword */:
-                    return parseSwitchStatement();
-                case 98 /* ThrowKeyword */:
-                    return parseThrowStatement();
-                case 100 /* TryKeyword */:
-                // Include 'catch' and 'finally' for error recovery.
-                case 72 /* CatchKeyword */:
-                case 85 /* FinallyKeyword */:
-                    return parseTryStatement();
-                case 76 /* DebuggerKeyword */:
-                    return parseDebuggerStatement();
-                case 55 /* AtToken */:
-                    return parseDeclaration();
-                case 118 /* AsyncKeyword */:
-                case 107 /* InterfaceKeyword */:
-                case 134 /* TypeKeyword */:
-                case 125 /* ModuleKeyword */:
-                case 126 /* NamespaceKeyword */:
-                case 122 /* DeclareKeyword */:
-                case 74 /* ConstKeyword */:
-                case 81 /* EnumKeyword */:
-                case 82 /* ExportKeyword */:
-                case 89 /* ImportKeyword */:
-                case 110 /* PrivateKeyword */:
-                case 111 /* ProtectedKeyword */:
-                case 112 /* PublicKeyword */:
-                case 115 /* AbstractKeyword */:
-                case 113 /* StaticKeyword */:
-                case 128 /* ReadonlyKeyword */:
-                case 137 /* GlobalKeyword */:
-                    if (isStartOfDeclaration()) {
-                        return parseDeclaration();
-                    }
-                    break;
+        var failedLookupLocations = [];
+        var resolved = primaryLookup();
+        var primary = true;
+        if (!resolved) {
+            resolved = secondaryLookup();
+            primary = false;
+        }
+        var resolvedTypeReferenceDirective;
+        if (resolved) {
+            resolved = realpath(resolved, host, traceEnabled);
+            if (traceEnabled) {
+                trace(host, ts.Diagnostics.Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2, typeReferenceDirectiveName, resolved, primary);
             }
-            return parseExpressionOrLabeledStatement();
+            resolvedTypeReferenceDirective = { primary: primary, resolvedFileName: resolved };
         }
-        function parseDeclaration() {
-            var fullStart = getNodePos();
-            var decorators = parseDecorators();
-            var modifiers = parseModifiers();
-            switch (token()) {
-                case 102 /* VarKeyword */:
-                case 108 /* LetKeyword */:
-                case 74 /* ConstKeyword */:
-                    return parseVariableStatement(fullStart, decorators, modifiers);
-                case 87 /* FunctionKeyword */:
-                    return parseFunctionDeclaration(fullStart, decorators, modifiers);
-                case 73 /* ClassKeyword */:
-                    return parseClassDeclaration(fullStart, decorators, modifiers);
-                case 107 /* InterfaceKeyword */:
-                    return parseInterfaceDeclaration(fullStart, decorators, modifiers);
-                case 134 /* TypeKeyword */:
-                    return parseTypeAliasDeclaration(fullStart, decorators, modifiers);
-                case 81 /* EnumKeyword */:
-                    return parseEnumDeclaration(fullStart, decorators, modifiers);
-                case 137 /* GlobalKeyword */:
-                case 125 /* ModuleKeyword */:
-                case 126 /* NamespaceKeyword */:
-                    return parseModuleDeclaration(fullStart, decorators, modifiers);
-                case 89 /* ImportKeyword */:
-                    return parseImportDeclarationOrImportEqualsDeclaration(fullStart, decorators, modifiers);
-                case 82 /* ExportKeyword */:
-                    nextToken();
-                    switch (token()) {
-                        case 77 /* DefaultKeyword */:
-                        case 56 /* EqualsToken */:
-                            return parseExportAssignment(fullStart, decorators, modifiers);
-                        case 116 /* AsKeyword */:
-                            return parseNamespaceExportDeclaration(fullStart, decorators, modifiers);
-                        default:
-                            return parseExportDeclaration(fullStart, decorators, modifiers);
-                    }
-                default:
-                    if (decorators || modifiers) {
-                        // We reached this point because we encountered decorators and/or modifiers and assumed a declaration
-                        // would follow. For recovery and error reporting purposes, return an incomplete declaration.
-                        var node = createMissingNode(239 /* MissingDeclaration */, /*reportAtCurrentPosition*/ true, ts.Diagnostics.Declaration_expected);
-                        node.pos = fullStart;
-                        node.decorators = decorators;
-                        node.modifiers = modifiers;
-                        return finishNode(node);
+        return { resolvedTypeReferenceDirective: resolvedTypeReferenceDirective, failedLookupLocations: failedLookupLocations };
+        function primaryLookup() {
+            // Check primary library paths
+            if (typeRoots && typeRoots.length) {
+                if (traceEnabled) {
+                    trace(host, ts.Diagnostics.Resolving_with_primary_search_path_0, typeRoots.join(", "));
+                }
+                return ts.forEach(typeRoots, function (typeRoot) {
+                    var candidate = ts.combinePaths(typeRoot, typeReferenceDirectiveName);
+                    var candidateDirectory = ts.getDirectoryPath(candidate);
+                    var directoryExists = directoryProbablyExists(candidateDirectory, host);
+                    if (!directoryExists && traceEnabled) {
+                        trace(host, ts.Diagnostics.Directory_0_does_not_exist_skipping_all_lookups_in_it, candidateDirectory);
                     }
+                    return resolvedTypeScriptOnly(loadNodeModuleFromDirectory(Extensions.DtsOnly, candidate, failedLookupLocations, !directoryExists, moduleResolutionState));
+                });
             }
-        }
-        function nextTokenIsIdentifierOrStringLiteralOnSameLine() {
-            nextToken();
-            return !scanner.hasPrecedingLineBreak() && (isIdentifier() || token() === 9 /* StringLiteral */);
-        }
-        function parseFunctionBlockOrSemicolon(isGenerator, isAsync, diagnosticMessage) {
-            if (token() !== 15 /* OpenBraceToken */ && canParseSemicolon()) {
-                parseSemicolon();
-                return;
-            }
-            return parseFunctionBlock(isGenerator, isAsync, /*ignoreMissingOpenBrace*/ false, diagnosticMessage);
-        }
-        // DECLARATIONS
-        function parseArrayBindingElement() {
-            if (token() === 24 /* CommaToken */) {
-                return createNode(193 /* OmittedExpression */);
+            else {
+                if (traceEnabled) {
+                    trace(host, ts.Diagnostics.Root_directory_cannot_be_determined_skipping_primary_search_paths);
+                }
             }
-            var node = createNode(169 /* BindingElement */);
-            node.dotDotDotToken = parseOptionalToken(22 /* DotDotDotToken */);
-            node.name = parseIdentifierOrPattern();
-            node.initializer = parseBindingElementInitializer(/*inParameter*/ false);
-            return finishNode(node);
         }
-        function parseObjectBindingElement() {
-            var node = createNode(169 /* BindingElement */);
-            var tokenIsIdentifier = isIdentifier();
-            var propertyName = parsePropertyName();
-            if (tokenIsIdentifier && token() !== 54 /* ColonToken */) {
-                node.name = propertyName;
+        function secondaryLookup() {
+            var resolvedFile;
+            var initialLocationForSecondaryLookup = containingFile && ts.getDirectoryPath(containingFile);
+            if (initialLocationForSecondaryLookup !== undefined) {
+                // check secondary locations
+                if (traceEnabled) {
+                    trace(host, ts.Diagnostics.Looking_up_in_node_modules_folder_initial_location_0, initialLocationForSecondaryLookup);
+                }
+                var result = loadModuleFromNodeModules(Extensions.DtsOnly, typeReferenceDirectiveName, initialLocationForSecondaryLookup, failedLookupLocations, moduleResolutionState, /*cache*/ undefined);
+                resolvedFile = resolvedTypeScriptOnly(result && result.value);
+                if (!resolvedFile && traceEnabled) {
+                    trace(host, ts.Diagnostics.Type_reference_directive_0_was_not_resolved, typeReferenceDirectiveName);
+                }
+                return resolvedFile;
             }
             else {
-                parseExpected(54 /* ColonToken */);
-                node.propertyName = propertyName;
-                node.name = parseIdentifierOrPattern();
+                if (traceEnabled) {
+                    trace(host, ts.Diagnostics.Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_modules_folder);
+                }
             }
-            node.initializer = parseBindingElementInitializer(/*inParameter*/ false);
-            return finishNode(node);
         }
-        function parseObjectBindingPattern() {
-            var node = createNode(167 /* ObjectBindingPattern */);
-            parseExpected(15 /* OpenBraceToken */);
-            node.elements = parseDelimitedList(9 /* ObjectBindingElements */, parseObjectBindingElement);
-            parseExpected(16 /* CloseBraceToken */);
-            return finishNode(node);
+    }
+    ts.resolveTypeReferenceDirective = resolveTypeReferenceDirective;
+    /**
+     * Given a set of options, returns the set of type directive names
+     *   that should be included for this program automatically.
+     * This list could either come from the config file,
+     *   or from enumerating the types root + initial secondary types lookup location.
+     * More type directives might appear in the program later as a result of loading actual source files;
+     *   this list is only the set of defaults that are implicitly included.
+     */
+    function getAutomaticTypeDirectiveNames(options, host) {
+        // Use explicit type list from tsconfig.json
+        if (options.types) {
+            return options.types;
         }
-        function parseArrayBindingPattern() {
-            var node = createNode(168 /* ArrayBindingPattern */);
-            parseExpected(19 /* OpenBracketToken */);
-            node.elements = parseDelimitedList(10 /* ArrayBindingElements */, parseArrayBindingElement);
-            parseExpected(20 /* CloseBracketToken */);
-            return finishNode(node);
+        // Walk the primary type lookup locations
+        var result = [];
+        if (host.directoryExists && host.getDirectories) {
+            var typeRoots = getEffectiveTypeRoots(options, host);
+            if (typeRoots) {
+                for (var _i = 0, typeRoots_1 = typeRoots; _i < typeRoots_1.length; _i++) {
+                    var root = typeRoots_1[_i];
+                    if (host.directoryExists(root)) {
+                        for (var _a = 0, _b = host.getDirectories(root); _a < _b.length; _a++) {
+                            var typeDirectivePath = _b[_a];
+                            var normalized = ts.normalizePath(typeDirectivePath);
+                            var packageJsonPath = pathToPackageJson(ts.combinePaths(root, normalized));
+                            // tslint:disable-next-line:no-null-keyword
+                            var isNotNeededPackage = host.fileExists(packageJsonPath) && readJson(packageJsonPath, host).typings === null;
+                            if (!isNotNeededPackage) {
+                                // Return just the type directive names
+                                result.push(ts.getBaseFileName(normalized));
+                            }
+                        }
+                    }
+                }
+            }
         }
-        function isIdentifierOrPattern() {
-            return token() === 15 /* OpenBraceToken */ || token() === 19 /* OpenBracketToken */ || isIdentifier();
+        return result;
+    }
+    ts.getAutomaticTypeDirectiveNames = getAutomaticTypeDirectiveNames;
+    function createModuleResolutionCache(currentDirectory, getCanonicalFileName) {
+        var directoryToModuleNameMap = ts.createFileMap();
+        var moduleNameToDirectoryMap = ts.createMap();
+        return { getOrCreateCacheForDirectory: getOrCreateCacheForDirectory, getOrCreateCacheForModuleName: getOrCreateCacheForModuleName };
+        function getOrCreateCacheForDirectory(directoryName) {
+            var path = ts.toPath(directoryName, currentDirectory, getCanonicalFileName);
+            var perFolderCache = directoryToModuleNameMap.get(path);
+            if (!perFolderCache) {
+                perFolderCache = ts.createMap();
+                directoryToModuleNameMap.set(path, perFolderCache);
+            }
+            return perFolderCache;
+        }
+        function getOrCreateCacheForModuleName(nonRelativeModuleName) {
+            if (!moduleHasNonRelativeName(nonRelativeModuleName)) {
+                return undefined;
+            }
+            var perModuleNameCache = moduleNameToDirectoryMap.get(nonRelativeModuleName);
+            if (!perModuleNameCache) {
+                perModuleNameCache = createPerModuleNameCache();
+                moduleNameToDirectoryMap.set(nonRelativeModuleName, perModuleNameCache);
+            }
+            return perModuleNameCache;
         }
-        function parseIdentifierOrPattern() {
-            if (token() === 19 /* OpenBracketToken */) {
-                return parseArrayBindingPattern();
+        function createPerModuleNameCache() {
+            var directoryPathMap = ts.createFileMap();
+            return { get: get, set: set };
+            function get(directory) {
+                return directoryPathMap.get(ts.toPath(directory, currentDirectory, getCanonicalFileName));
             }
-            if (token() === 15 /* OpenBraceToken */) {
-                return parseObjectBindingPattern();
+            /**
+             * At first this function add entry directory -> module resolution result to the table.
+             * Then it computes the set of parent folders for 'directory' that should have the same module resolution result
+             * and for every parent folder in set it adds entry: parent -> module resolution. .
+             * Lets say we first directory name: /a/b/c/d/e and resolution result is: /a/b/bar.ts.
+             * Set of parent folders that should have the same result will be:
+             * [
+             *     /a/b/c/d, /a/b/c, /a/b
+             * ]
+             * this means that request for module resolution from file in any of these folder will be immediately found in cache.
+             */
+            function set(directory, result) {
+                var path = ts.toPath(directory, currentDirectory, getCanonicalFileName);
+                // if entry is already in cache do nothing
+                if (directoryPathMap.contains(path)) {
+                    return;
+                }
+                directoryPathMap.set(path, result);
+                var resolvedFileName = result.resolvedModule && result.resolvedModule.resolvedFileName;
+                // find common prefix between directory and resolved file name
+                // this common prefix should be the shorted path that has the same resolution
+                // directory: /a/b/c/d/e
+                // resolvedFileName: /a/b/foo.d.ts
+                var commonPrefix = getCommonPrefix(path, resolvedFileName);
+                var current = path;
+                while (true) {
+                    var parent_5 = ts.getDirectoryPath(current);
+                    if (parent_5 === current || directoryPathMap.contains(parent_5)) {
+                        break;
+                    }
+                    directoryPathMap.set(parent_5, result);
+                    current = parent_5;
+                    if (current === commonPrefix) {
+                        break;
+                    }
+                }
+            }
+            function getCommonPrefix(directory, resolution) {
+                if (resolution === undefined) {
+                    return undefined;
+                }
+                var resolutionDirectory = ts.toPath(ts.getDirectoryPath(resolution), currentDirectory, getCanonicalFileName);
+                // find first position where directory and resolution differs
+                var i = 0;
+                while (i < Math.min(directory.length, resolutionDirectory.length) && directory.charCodeAt(i) === resolutionDirectory.charCodeAt(i)) {
+                    i++;
+                }
+                // find last directory separator before position i
+                var sep = directory.lastIndexOf(ts.directorySeparator, i);
+                if (sep < 0) {
+                    return undefined;
+                }
+                return directory.substr(0, sep);
             }
-            return parseIdentifier();
         }
-        function parseVariableDeclaration() {
-            var node = createNode(218 /* VariableDeclaration */);
-            node.name = parseIdentifierOrPattern();
-            node.type = parseTypeAnnotation();
-            if (!isInOrOfKeyword(token())) {
-                node.initializer = parseInitializer(/*inParameter*/ false);
+    }
+    ts.createModuleResolutionCache = createModuleResolutionCache;
+    function resolveModuleName(moduleName, containingFile, compilerOptions, host, cache) {
+        var traceEnabled = isTraceEnabled(compilerOptions, host);
+        if (traceEnabled) {
+            trace(host, ts.Diagnostics.Resolving_module_0_from_1, moduleName, containingFile);
+        }
+        var containingDirectory = ts.getDirectoryPath(containingFile);
+        var perFolderCache = cache && cache.getOrCreateCacheForDirectory(containingDirectory);
+        var result = perFolderCache && perFolderCache.get(moduleName);
+        if (result) {
+            if (traceEnabled) {
+                trace(host, ts.Diagnostics.Resolution_for_module_0_was_found_in_cache, moduleName);
             }
-            return finishNode(node);
         }
-        function parseVariableDeclarationList(inForStatementInitializer) {
-            var node = createNode(219 /* VariableDeclarationList */);
-            switch (token()) {
-                case 102 /* VarKeyword */:
-                    break;
-                case 108 /* LetKeyword */:
-                    node.flags |= 1 /* Let */;
+        else {
+            var moduleResolution = compilerOptions.moduleResolution;
+            if (moduleResolution === undefined) {
+                moduleResolution = ts.getEmitModuleKind(compilerOptions) === ts.ModuleKind.CommonJS ? ts.ModuleResolutionKind.NodeJs : ts.ModuleResolutionKind.Classic;
+                if (traceEnabled) {
+                    trace(host, ts.Diagnostics.Module_resolution_kind_is_not_specified_using_0, ts.ModuleResolutionKind[moduleResolution]);
+                }
+            }
+            else {
+                if (traceEnabled) {
+                    trace(host, ts.Diagnostics.Explicitly_specified_module_resolution_kind_Colon_0, ts.ModuleResolutionKind[moduleResolution]);
+                }
+            }
+            switch (moduleResolution) {
+                case ts.ModuleResolutionKind.NodeJs:
+                    result = nodeModuleNameResolver(moduleName, containingFile, compilerOptions, host, cache);
                     break;
-                case 74 /* ConstKeyword */:
-                    node.flags |= 2 /* Const */;
+                case ts.ModuleResolutionKind.Classic:
+                    result = classicNameResolver(moduleName, containingFile, compilerOptions, host, cache);
                     break;
                 default:
-                    ts.Debug.fail();
+                    ts.Debug.fail("Unexpected moduleResolution: " + moduleResolution);
             }
-            nextToken();
-            // The user may have written the following:
-            //
-            //    for (let of X) { }
-            //
-            // In this case, we want to parse an empty declaration list, and then parse 'of'
-            // as a keyword. The reason this is not automatic is that 'of' is a valid identifier.
-            // So we need to look ahead to determine if 'of' should be treated as a keyword in
-            // this context.
-            // The checker will then give an error that there is an empty declaration list.
-            if (token() === 138 /* OfKeyword */ && lookAhead(canFollowContextualOfKeyword)) {
-                node.declarations = createMissingList();
+            if (perFolderCache) {
+                perFolderCache.set(moduleName, result);
+                // put result in per-module name cache
+                var perModuleNameCache = cache.getOrCreateCacheForModuleName(moduleName);
+                if (perModuleNameCache) {
+                    perModuleNameCache.set(containingDirectory, result);
+                }
+            }
+        }
+        if (traceEnabled) {
+            if (result.resolvedModule) {
+                trace(host, ts.Diagnostics.Module_name_0_was_successfully_resolved_to_1, moduleName, result.resolvedModule.resolvedFileName);
             }
             else {
-                var savedDisallowIn = inDisallowInContext();
-                setDisallowInContext(inForStatementInitializer);
-                node.declarations = parseDelimitedList(8 /* VariableDeclarations */, parseVariableDeclaration);
-                setDisallowInContext(savedDisallowIn);
+                trace(host, ts.Diagnostics.Module_name_0_was_not_resolved, moduleName);
             }
-            return finishNode(node);
-        }
-        function canFollowContextualOfKeyword() {
-            return nextTokenIsIdentifier() && nextToken() === 18 /* CloseParenToken */;
-        }
-        function parseVariableStatement(fullStart, decorators, modifiers) {
-            var node = createNode(200 /* VariableStatement */, fullStart);
-            node.decorators = decorators;
-            node.modifiers = modifiers;
-            node.declarationList = parseVariableDeclarationList(/*inForStatementInitializer*/ false);
-            parseSemicolon();
-            return addJSDocComment(finishNode(node));
         }
-        function parseFunctionDeclaration(fullStart, decorators, modifiers) {
-            var node = createNode(220 /* FunctionDeclaration */, fullStart);
-            node.decorators = decorators;
-            node.modifiers = modifiers;
-            parseExpected(87 /* FunctionKeyword */);
-            node.asteriskToken = parseOptionalToken(37 /* AsteriskToken */);
-            node.name = ts.hasModifier(node, 512 /* Default */) ? parseOptionalIdentifier() : parseIdentifier();
-            var isGenerator = !!node.asteriskToken;
-            var isAsync = ts.hasModifier(node, 256 /* Async */);
-            fillSignature(54 /* ColonToken */, /*yieldContext*/ isGenerator, /*awaitContext*/ isAsync, /*requireCompleteParameterList*/ false, node);
-            node.body = parseFunctionBlockOrSemicolon(isGenerator, isAsync, ts.Diagnostics.or_expected);
-            return addJSDocComment(finishNode(node));
+        return result;
+    }
+    ts.resolveModuleName = resolveModuleName;
+    /**
+     * Any module resolution kind can be augmented with optional settings: 'baseUrl', 'paths' and 'rootDirs' - they are used to
+     * mitigate differences between design time structure of the project and its runtime counterpart so the same import name
+     * can be resolved successfully by TypeScript compiler and runtime module loader.
+     * If these settings are set then loading procedure will try to use them to resolve module name and it can of failure it will
+     * fallback to standard resolution routine.
+     *
+     * - baseUrl - this setting controls how non-relative module names are resolved. If this setting is specified then non-relative
+     * names will be resolved relative to baseUrl: i.e. if baseUrl is '/a/b' then candidate location to resolve module name 'c/d' will
+     * be '/a/b/c/d'
+     * - paths - this setting can only be used when baseUrl is specified. allows to tune how non-relative module names
+     * will be resolved based on the content of the module name.
+     * Structure of 'paths' compiler options
+     * 'paths': {
+     *    pattern-1: [...substitutions],
+     *    pattern-2: [...substitutions],
+     *    ...
+     *    pattern-n: [...substitutions]
+     * }
+     * Pattern here is a string that can contain zero or one '*' character. During module resolution module name will be matched against
+     * all patterns in the list. Matching for patterns that don't contain '*' means that module name must be equal to pattern respecting the case.
+     * If pattern contains '*' then to match pattern "<prefix>*<suffix>" module name must start with the <prefix> and end with <suffix>.
+     * <MatchedStar> denotes part of the module name between <prefix> and <suffix>.
+     * If module name can be matches with multiple patterns then pattern with the longest prefix will be picked.
+     * After selecting pattern we'll use list of substitutions to get candidate locations of the module and the try to load module
+     * from the candidate location.
+     * Substitution is a string that can contain zero or one '*'. To get candidate location from substitution we'll pick every
+     * substitution in the list and replace '*' with <MatchedStar> string. If candidate location is not rooted it
+     * will be converted to absolute using baseUrl.
+     * For example:
+     * baseUrl: /a/b/c
+     * "paths": {
+     *     // match all module names
+     *     "*": [
+     *         "*",        // use matched name as is,
+     *                     // <matched name> will be looked as /a/b/c/<matched name>
+     *
+     *         "folder1/*" // substitution will convert matched name to 'folder1/<matched name>',
+     *                     // since it is not rooted then final candidate location will be /a/b/c/folder1/<matched name>
+     *     ],
+     *     // match module names that start with 'components/'
+     *     "components/*": [ "/root/components/*" ] // substitution will convert /components/folder1/<matched name> to '/root/components/folder1/<matched name>',
+     *                                              // it is rooted so it will be final candidate location
+     * }
+     *
+     * 'rootDirs' allows the project to be spreaded across multiple locations and resolve modules with relative names as if
+     * they were in the same location. For example lets say there are two files
+     * '/local/src/content/file1.ts'
+     * '/shared/components/contracts/src/content/protocols/file2.ts'
+     * After bundling content of '/shared/components/contracts/src' will be merged with '/local/src' so
+     * if file1 has the following import 'import {x} from "./protocols/file2"' it will be resolved successfully in runtime.
+     * 'rootDirs' provides the way to tell compiler that in order to get the whole project it should behave as if content of all
+     * root dirs were merged together.
+     * I.e. for the example above 'rootDirs' will have two entries: [ '/local/src', '/shared/components/contracts/src' ].
+     * Compiler will first convert './protocols/file2' into absolute path relative to the location of containing file:
+     * '/local/src/content/protocols/file2' and try to load it - failure.
+     * Then it will search 'rootDirs' looking for a longest matching prefix of this absolute path and if such prefix is found - absolute path will
+     * be converted to a path relative to found rootDir entry './content/protocols/file2' (*). As a last step compiler will check all remaining
+     * entries in 'rootDirs', use them to build absolute path out of (*) and try to resolve module from this location.
+     */
+    function tryLoadModuleUsingOptionalResolutionSettings(extensions, moduleName, containingDirectory, loader, failedLookupLocations, state) {
+        if (moduleHasNonRelativeName(moduleName)) {
+            return tryLoadModuleUsingBaseUrl(extensions, moduleName, loader, failedLookupLocations, state);
         }
-        function parseConstructorDeclaration(pos, decorators, modifiers) {
-            var node = createNode(148 /* Constructor */, pos);
-            node.decorators = decorators;
-            node.modifiers = modifiers;
-            parseExpected(121 /* ConstructorKeyword */);
-            fillSignature(54 /* ColonToken */, /*yieldContext*/ false, /*awaitContext*/ false, /*requireCompleteParameterList*/ false, node);
-            node.body = parseFunctionBlockOrSemicolon(/*isGenerator*/ false, /*isAsync*/ false, ts.Diagnostics.or_expected);
-            return addJSDocComment(finishNode(node));
+        else {
+            return tryLoadModuleUsingRootDirs(extensions, moduleName, containingDirectory, loader, failedLookupLocations, state);
         }
-        function parseMethodDeclaration(fullStart, decorators, modifiers, asteriskToken, name, questionToken, diagnosticMessage) {
-            var method = createNode(147 /* MethodDeclaration */, fullStart);
-            method.decorators = decorators;
-            method.modifiers = modifiers;
-            method.asteriskToken = asteriskToken;
-            method.name = name;
-            method.questionToken = questionToken;
-            var isGenerator = !!asteriskToken;
-            var isAsync = ts.hasModifier(method, 256 /* Async */);
-            fillSignature(54 /* ColonToken */, /*yieldContext*/ isGenerator, /*awaitContext*/ isAsync, /*requireCompleteParameterList*/ false, method);
-            method.body = parseFunctionBlockOrSemicolon(isGenerator, isAsync, diagnosticMessage);
-            return addJSDocComment(finishNode(method));
+    }
+    function tryLoadModuleUsingRootDirs(extensions, moduleName, containingDirectory, loader, failedLookupLocations, state) {
+        if (!state.compilerOptions.rootDirs) {
+            return undefined;
         }
-        function parsePropertyDeclaration(fullStart, decorators, modifiers, name, questionToken) {
-            var property = createNode(145 /* PropertyDeclaration */, fullStart);
-            property.decorators = decorators;
-            property.modifiers = modifiers;
-            property.name = name;
-            property.questionToken = questionToken;
-            property.type = parseTypeAnnotation();
-            // For instance properties specifically, since they are evaluated inside the constructor,
-            // we do *not * want to parse yield expressions, so we specifically turn the yield context
-            // off. The grammar would look something like this:
-            //
-            //    MemberVariableDeclaration[Yield]:
-            //        AccessibilityModifier_opt   PropertyName   TypeAnnotation_opt   Initializer_opt[In];
-            //        AccessibilityModifier_opt  static_opt  PropertyName   TypeAnnotation_opt   Initializer_opt[In, ?Yield];
-            //
-            // The checker may still error in the static case to explicitly disallow the yield expression.
-            property.initializer = ts.hasModifier(property, 32 /* Static */)
-                ? allowInAnd(parseNonParameterInitializer)
-                : doOutsideOfContext(65536 /* YieldContext */ | 32768 /* DisallowInContext */, parseNonParameterInitializer);
-            parseSemicolon();
-            return addJSDocComment(finishNode(property));
+        if (state.traceEnabled) {
+            trace(state.host, ts.Diagnostics.rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0, moduleName);
         }
-        function parsePropertyOrMethodDeclaration(fullStart, decorators, modifiers) {
-            var asteriskToken = parseOptionalToken(37 /* AsteriskToken */);
-            var name = parsePropertyName();
-            // Note: this is not legal as per the grammar.  But we allow it in the parser and
-            // report an error in the grammar checker.
-            var questionToken = parseOptionalToken(53 /* QuestionToken */);
-            if (asteriskToken || token() === 17 /* OpenParenToken */ || token() === 25 /* LessThanToken */) {
-                return parseMethodDeclaration(fullStart, decorators, modifiers, asteriskToken, name, questionToken, ts.Diagnostics.or_expected);
+        var candidate = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
+        var matchedRootDir;
+        var matchedNormalizedPrefix;
+        for (var _i = 0, _a = state.compilerOptions.rootDirs; _i < _a.length; _i++) {
+            var rootDir = _a[_i];
+            // rootDirs are expected to be absolute
+            // in case of tsconfig.json this will happen automatically - compiler will expand relative names
+            // using location of tsconfig.json as base location
+            var normalizedRoot = ts.normalizePath(rootDir);
+            if (!ts.endsWith(normalizedRoot, ts.directorySeparator)) {
+                normalizedRoot += ts.directorySeparator;
             }
-            else {
-                return parsePropertyDeclaration(fullStart, decorators, modifiers, name, questionToken);
+            var isLongestMatchingPrefix = ts.startsWith(candidate, normalizedRoot) &&
+                (matchedNormalizedPrefix === undefined || matchedNormalizedPrefix.length < normalizedRoot.length);
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Checking_if_0_is_the_longest_matching_prefix_for_1_2, normalizedRoot, candidate, isLongestMatchingPrefix);
             }
-        }
-        function parseNonParameterInitializer() {
-            return parseInitializer(/*inParameter*/ false);
-        }
-        function parseAccessorDeclaration(kind, fullStart, decorators, modifiers) {
-            var node = createNode(kind, fullStart);
-            node.decorators = decorators;
-            node.modifiers = modifiers;
-            node.name = parsePropertyName();
-            fillSignature(54 /* ColonToken */, /*yieldContext*/ false, /*awaitContext*/ false, /*requireCompleteParameterList*/ false, node);
-            node.body = parseFunctionBlockOrSemicolon(/*isGenerator*/ false, /*isAsync*/ false);
-            return addJSDocComment(finishNode(node));
-        }
-        function isClassMemberModifier(idToken) {
-            switch (idToken) {
-                case 112 /* PublicKeyword */:
-                case 110 /* PrivateKeyword */:
-                case 111 /* ProtectedKeyword */:
-                case 113 /* StaticKeyword */:
-                case 128 /* ReadonlyKeyword */:
-                    return true;
-                default:
-                    return false;
+            if (isLongestMatchingPrefix) {
+                matchedNormalizedPrefix = normalizedRoot;
+                matchedRootDir = rootDir;
             }
         }
-        function isClassMemberStart() {
-            var idToken;
-            if (token() === 55 /* AtToken */) {
-                return true;
-            }
-            // Eat up all modifiers, but hold on to the last one in case it is actually an identifier.
-            while (ts.isModifierKind(token())) {
-                idToken = token();
-                // If the idToken is a class modifier (protected, private, public, and static), it is
-                // certain that we are starting to parse class member. This allows better error recovery
-                // Example:
-                //      public foo() ...     // true
-                //      public @dec blah ... // true; we will then report an error later
-                //      export public ...    // true; we will then report an error later
-                if (isClassMemberModifier(idToken)) {
-                    return true;
-                }
-                nextToken();
-            }
-            if (token() === 37 /* AsteriskToken */) {
-                return true;
+        if (matchedNormalizedPrefix) {
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Longest_matching_prefix_for_0_is_1, candidate, matchedNormalizedPrefix);
             }
-            // Try to get the first property-like token following all modifiers.
-            // This can either be an identifier or the 'get' or 'set' keywords.
-            if (isLiteralPropertyName()) {
-                idToken = token();
-                nextToken();
+            var suffix = candidate.substr(matchedNormalizedPrefix.length);
+            // first - try to load from a initial location
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Loading_0_from_the_root_dir_1_candidate_location_2, suffix, matchedNormalizedPrefix, candidate);
             }
-            // Index signatures and computed properties are class members; we can parse.
-            if (token() === 19 /* OpenBracketToken */) {
-                return true;
+            var resolvedFileName = loader(extensions, candidate, failedLookupLocations, !directoryProbablyExists(containingDirectory, state.host), state);
+            if (resolvedFileName) {
+                return resolvedFileName;
             }
-            // If we were able to get any potential identifier...
-            if (idToken !== undefined) {
-                // If we have a non-keyword identifier, or if we have an accessor, then it's safe to parse.
-                if (!ts.isKeyword(idToken) || idToken === 131 /* SetKeyword */ || idToken === 123 /* GetKeyword */) {
-                    return true;
-                }
-                // If it *is* a keyword, but not an accessor, check a little farther along
-                // to see if it should actually be parsed as a class member.
-                switch (token()) {
-                    case 17 /* OpenParenToken */: // Method declaration
-                    case 25 /* LessThanToken */: // Generic Method declaration
-                    case 54 /* ColonToken */: // Type Annotation for declaration
-                    case 56 /* EqualsToken */: // Initializer for declaration
-                    case 53 /* QuestionToken */:
-                        return true;
-                    default:
-                        // Covers
-                        //  - Semicolons     (declaration termination)
-                        //  - Closing braces (end-of-class, must be declaration)
-                        //  - End-of-files   (not valid, but permitted so that it gets caught later on)
-                        //  - Line-breaks    (enabling *automatic semicolon insertion*)
-                        return canParseSemicolon();
-                }
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Trying_other_entries_in_rootDirs);
             }
-            return false;
-        }
-        function parseDecorators() {
-            var decorators;
-            while (true) {
-                var decoratorStart = getNodePos();
-                if (!parseOptional(55 /* AtToken */)) {
-                    break;
+            // then try to resolve using remaining entries in rootDirs
+            for (var _b = 0, _c = state.compilerOptions.rootDirs; _b < _c.length; _b++) {
+                var rootDir = _c[_b];
+                if (rootDir === matchedRootDir) {
+                    // skip the initially matched entry
+                    continue;
                 }
-                var decorator = createNode(143 /* Decorator */, decoratorStart);
-                decorator.expression = doInDecoratorContext(parseLeftHandSideExpressionOrHigher);
-                finishNode(decorator);
-                if (!decorators) {
-                    decorators = createNodeArray([decorator], decoratorStart);
+                var candidate_1 = ts.combinePaths(ts.normalizePath(rootDir), suffix);
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.Loading_0_from_the_root_dir_1_candidate_location_2, suffix, rootDir, candidate_1);
                 }
-                else {
-                    decorators.push(decorator);
+                var baseDirectory = ts.getDirectoryPath(candidate_1);
+                var resolvedFileName_1 = loader(extensions, candidate_1, failedLookupLocations, !directoryProbablyExists(baseDirectory, state.host), state);
+                if (resolvedFileName_1) {
+                    return resolvedFileName_1;
                 }
             }
-            if (decorators) {
-                decorators.end = getNodeEnd();
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Module_resolution_using_rootDirs_has_failed);
             }
-            return decorators;
         }
-        /*
-         * There are situations in which a modifier like 'const' will appear unexpectedly, such as on a class member.
-         * In those situations, if we are entirely sure that 'const' is not valid on its own (such as when ASI takes effect
-         * and turns it into a standalone declaration), then it is better to parse it and report an error later.
-         *
-         * In such situations, 'permitInvalidConstAsModifier' should be set to true.
-         */
-        function parseModifiers(permitInvalidConstAsModifier) {
-            var modifiers;
-            while (true) {
-                var modifierStart = scanner.getStartPos();
-                var modifierKind = token();
-                if (token() === 74 /* ConstKeyword */ && permitInvalidConstAsModifier) {
-                    // We need to ensure that any subsequent modifiers appear on the same line
-                    // so that when 'const' is a standalone declaration, we don't issue an error.
-                    if (!tryParse(nextTokenIsOnSameLineAndCanFollowModifier)) {
-                        break;
-                    }
-                }
-                else {
-                    if (!parseAnyContextualModifier()) {
-                        break;
-                    }
+        return undefined;
+    }
+    function tryLoadModuleUsingBaseUrl(extensions, moduleName, loader, failedLookupLocations, state) {
+        if (!state.compilerOptions.baseUrl) {
+            return undefined;
+        }
+        if (state.traceEnabled) {
+            trace(state.host, ts.Diagnostics.baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1, state.compilerOptions.baseUrl, moduleName);
+        }
+        // string is for exact match
+        var matchedPattern = undefined;
+        if (state.compilerOptions.paths) {
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.paths_option_is_specified_looking_for_a_pattern_to_match_module_name_0, moduleName);
+            }
+            matchedPattern = ts.matchPatternOrExact(ts.getOwnKeys(state.compilerOptions.paths), moduleName);
+        }
+        if (matchedPattern) {
+            var matchedStar_1 = typeof matchedPattern === "string" ? undefined : ts.matchedText(matchedPattern, moduleName);
+            var matchedPatternText = typeof matchedPattern === "string" ? matchedPattern : ts.patternText(matchedPattern);
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Module_name_0_matched_pattern_1, moduleName, matchedPatternText);
+            }
+            return ts.forEach(state.compilerOptions.paths[matchedPatternText], function (subst) {
+                var path = matchedStar_1 ? subst.replace("*", matchedStar_1) : subst;
+                var candidate = ts.normalizePath(ts.combinePaths(state.compilerOptions.baseUrl, path));
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.Trying_substitution_0_candidate_module_location_Colon_1, subst, path);
                 }
-                var modifier = finishNode(createNode(modifierKind, modifierStart));
-                if (!modifiers) {
-                    modifiers = createNodeArray([modifier], modifierStart);
+                // A path mapping may have an extension, in contrast to an import, which should omit it.
+                var extension = ts.tryGetExtensionFromPath(candidate);
+                if (extension !== undefined) {
+                    var path_1 = tryFile(candidate, failedLookupLocations, /*onlyRecordFailures*/ false, state);
+                    if (path_1 !== undefined) {
+                        return { path: path_1, extension: extension };
+                    }
                 }
-                else {
-                    modifiers.push(modifier);
+                return loader(extensions, candidate, failedLookupLocations, !directoryProbablyExists(ts.getDirectoryPath(candidate), state.host), state);
+            });
+        }
+        else {
+            var candidate = ts.normalizePath(ts.combinePaths(state.compilerOptions.baseUrl, moduleName));
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Resolving_module_name_0_relative_to_base_url_1_2, moduleName, state.compilerOptions.baseUrl, candidate);
+            }
+            return loader(extensions, candidate, failedLookupLocations, !directoryProbablyExists(ts.getDirectoryPath(candidate), state.host), state);
+        }
+    }
+    function nodeModuleNameResolver(moduleName, containingFile, compilerOptions, host, cache) {
+        return nodeModuleNameResolverWorker(moduleName, ts.getDirectoryPath(containingFile), compilerOptions, host, cache, /*jsOnly*/ false);
+    }
+    ts.nodeModuleNameResolver = nodeModuleNameResolver;
+    /**
+     * Expose resolution logic to allow us to use Node module resolution logic from arbitrary locations.
+     * No way to do this with `require()`: https://github.com/nodejs/node/issues/5963
+     * Throws an error if the module can't be resolved.
+     */
+    /* @internal */
+    function resolveJavaScriptModule(moduleName, initialDir, host) {
+        var _a = nodeModuleNameResolverWorker(moduleName, initialDir, { moduleResolution: ts.ModuleResolutionKind.NodeJs, allowJs: true }, host, /*cache*/ undefined, /*jsOnly*/ true), resolvedModule = _a.resolvedModule, failedLookupLocations = _a.failedLookupLocations;
+        if (!resolvedModule) {
+            throw new Error("Could not resolve JS module " + moduleName + " starting at " + initialDir + ". Looked in: " + failedLookupLocations.join(", "));
+        }
+        return resolvedModule.resolvedFileName;
+    }
+    ts.resolveJavaScriptModule = resolveJavaScriptModule;
+    function nodeModuleNameResolverWorker(moduleName, containingDirectory, compilerOptions, host, cache, jsOnly) {
+        var traceEnabled = isTraceEnabled(compilerOptions, host);
+        var failedLookupLocations = [];
+        var state = { compilerOptions: compilerOptions, host: host, traceEnabled: traceEnabled };
+        var result = jsOnly ? tryResolve(Extensions.JavaScript) : (tryResolve(Extensions.TypeScript) || tryResolve(Extensions.JavaScript));
+        if (result && result.value) {
+            var _a = result.value, resolved = _a.resolved, isExternalLibraryImport = _a.isExternalLibraryImport;
+            return createResolvedModuleWithFailedLookupLocations(resolved, isExternalLibraryImport, failedLookupLocations);
+        }
+        return { resolvedModule: undefined, failedLookupLocations: failedLookupLocations };
+        function tryResolve(extensions) {
+            var loader = function (extensions, candidate, failedLookupLocations, onlyRecordFailures, state) { return nodeLoadModuleByRelativeName(extensions, candidate, failedLookupLocations, onlyRecordFailures, state, /*considerPackageJson*/ true); };
+            var resolved = tryLoadModuleUsingOptionalResolutionSettings(extensions, moduleName, containingDirectory, loader, failedLookupLocations, state);
+            if (resolved) {
+                return toSearchResult({ resolved: resolved, isExternalLibraryImport: false });
+            }
+            if (moduleHasNonRelativeName(moduleName)) {
+                if (traceEnabled) {
+                    trace(host, ts.Diagnostics.Loading_module_0_from_node_modules_folder_target_file_type_1, moduleName, Extensions[extensions]);
                 }
+                var resolved_1 = loadModuleFromNodeModules(extensions, moduleName, containingDirectory, failedLookupLocations, state, cache);
+                // For node_modules lookups, get the real path so that multiple accesses to an `npm link`-ed module do not create duplicate files.
+                return resolved_1 && { value: resolved_1.value && { resolved: { path: realpath(resolved_1.value.path, host, traceEnabled), extension: resolved_1.value.extension }, isExternalLibraryImport: true } };
             }
-            if (modifiers) {
-                modifiers.end = scanner.getStartPos();
+            else {
+                var candidate = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
+                var resolved_2 = nodeLoadModuleByRelativeName(extensions, candidate, failedLookupLocations, /*onlyRecordFailures*/ false, state, /*considerPackageJson*/ true);
+                return resolved_2 && toSearchResult({ resolved: resolved_2, isExternalLibraryImport: false });
             }
-            return modifiers;
         }
-        function parseModifiersForArrowFunction() {
-            var modifiers;
-            if (token() === 118 /* AsyncKeyword */) {
-                var modifierStart = scanner.getStartPos();
-                var modifierKind = token();
-                nextToken();
-                var modifier = finishNode(createNode(modifierKind, modifierStart));
-                modifiers = createNodeArray([modifier], modifierStart);
-                modifiers.end = scanner.getStartPos();
-            }
-            return modifiers;
+    }
+    function realpath(path, host, traceEnabled) {
+        if (!host.realpath) {
+            return path;
         }
-        function parseClassElement() {
-            if (token() === 23 /* SemicolonToken */) {
-                var result = createNode(198 /* SemicolonClassElement */);
-                nextToken();
-                return finishNode(result);
-            }
-            var fullStart = getNodePos();
-            var decorators = parseDecorators();
-            var modifiers = parseModifiers(/*permitInvalidConstAsModifier*/ true);
-            var accessor = tryParseAccessorDeclaration(fullStart, decorators, modifiers);
-            if (accessor) {
-                return accessor;
+        var real = ts.normalizePath(host.realpath(path));
+        if (traceEnabled) {
+            trace(host, ts.Diagnostics.Resolving_real_path_for_0_result_1, path, real);
+        }
+        return real;
+    }
+    function nodeLoadModuleByRelativeName(extensions, candidate, failedLookupLocations, onlyRecordFailures, state, considerPackageJson) {
+        if (state.traceEnabled) {
+            trace(state.host, ts.Diagnostics.Loading_module_as_file_Slash_folder_candidate_module_location_0_target_file_type_1, candidate, Extensions[extensions]);
+        }
+        if (!ts.pathEndsWithDirectorySeparator(candidate)) {
+            if (!onlyRecordFailures) {
+                var parentOfCandidate = ts.getDirectoryPath(candidate);
+                if (!directoryProbablyExists(parentOfCandidate, state.host)) {
+                    if (state.traceEnabled) {
+                        trace(state.host, ts.Diagnostics.Directory_0_does_not_exist_skipping_all_lookups_in_it, parentOfCandidate);
+                    }
+                    onlyRecordFailures = true;
+                }
             }
-            if (token() === 121 /* ConstructorKeyword */) {
-                return parseConstructorDeclaration(fullStart, decorators, modifiers);
+            var resolvedFromFile = loadModuleFromFile(extensions, candidate, failedLookupLocations, onlyRecordFailures, state);
+            if (resolvedFromFile) {
+                return resolvedFromFile;
             }
-            if (isIndexSignature()) {
-                return parseIndexSignatureDeclaration(fullStart, decorators, modifiers);
+        }
+        if (!onlyRecordFailures) {
+            var candidateExists = directoryProbablyExists(candidate, state.host);
+            if (!candidateExists) {
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.Directory_0_does_not_exist_skipping_all_lookups_in_it, candidate);
+                }
+                onlyRecordFailures = true;
             }
-            // It is very important that we check this *after* checking indexers because
-            // the [ token can start an index signature or a computed property name
-            if (ts.tokenIsIdentifierOrKeyword(token()) ||
-                token() === 9 /* StringLiteral */ ||
-                token() === 8 /* NumericLiteral */ ||
-                token() === 37 /* AsteriskToken */ ||
-                token() === 19 /* OpenBracketToken */) {
-                return parsePropertyOrMethodDeclaration(fullStart, decorators, modifiers);
+        }
+        return loadNodeModuleFromDirectory(extensions, candidate, failedLookupLocations, onlyRecordFailures, state, considerPackageJson);
+    }
+    /* @internal */
+    function directoryProbablyExists(directoryName, host) {
+        // if host does not support 'directoryExists' assume that directory will exist
+        return !host.directoryExists || host.directoryExists(directoryName);
+    }
+    ts.directoryProbablyExists = directoryProbablyExists;
+    /**
+     * @param {boolean} onlyRecordFailures - if true then function won't try to actually load files but instead record all attempts as failures. This flag is necessary
+     * in cases when we know upfront that all load attempts will fail (because containing folder does not exists) however we still need to record all failed lookup locations.
+     */
+    function loadModuleFromFile(extensions, candidate, failedLookupLocations, onlyRecordFailures, state) {
+        // First, try adding an extension. An import of "foo" could be matched by a file "foo.ts", or "foo.js" by "foo.js.ts"
+        var resolvedByAddingExtension = tryAddingExtensions(candidate, extensions, failedLookupLocations, onlyRecordFailures, state);
+        if (resolvedByAddingExtension) {
+            return resolvedByAddingExtension;
+        }
+        // If that didn't work, try stripping a ".js" or ".jsx" extension and replacing it with a TypeScript one;
+        // e.g. "./foo.js" can be matched by "./foo.ts" or "./foo.d.ts"
+        if (ts.hasJavaScriptFileExtension(candidate)) {
+            var extensionless = ts.removeFileExtension(candidate);
+            if (state.traceEnabled) {
+                var extension = candidate.substring(extensionless.length);
+                trace(state.host, ts.Diagnostics.File_name_0_has_a_1_extension_stripping_it, candidate, extension);
             }
-            if (decorators || modifiers) {
-                // treat this as a property declaration with a missing name.
-                var name_10 = createMissingNode(69 /* Identifier */, /*reportAtCurrentPosition*/ true, ts.Diagnostics.Declaration_expected);
-                return parsePropertyDeclaration(fullStart, decorators, modifiers, name_10, /*questionToken*/ undefined);
+            return tryAddingExtensions(extensionless, extensions, failedLookupLocations, onlyRecordFailures, state);
+        }
+    }
+    /** Try to return an existing file that adds one of the `extensions` to `candidate`. */
+    function tryAddingExtensions(candidate, extensions, failedLookupLocations, onlyRecordFailures, state) {
+        if (!onlyRecordFailures) {
+            // check if containing folder exists - if it doesn't then just record failures for all supported extensions without disk probing
+            var directory = ts.getDirectoryPath(candidate);
+            if (directory) {
+                onlyRecordFailures = !directoryProbablyExists(directory, state.host);
             }
-            // 'isClassMemberStart' should have hinted not to attempt parsing.
-            ts.Debug.fail("Should not have attempted to parse class member declaration.");
         }
-        function parseClassExpression() {
-            return parseClassDeclarationOrExpression(
-            /*fullStart*/ scanner.getStartPos(), 
-            /*decorators*/ undefined, 
-            /*modifiers*/ undefined, 192 /* ClassExpression */);
+        switch (extensions) {
+            case Extensions.DtsOnly:
+                return tryExtension(".d.ts" /* Dts */);
+            case Extensions.TypeScript:
+                return tryExtension(".ts" /* Ts */) || tryExtension(".tsx" /* Tsx */) || tryExtension(".d.ts" /* Dts */);
+            case Extensions.JavaScript:
+                return tryExtension(".js" /* Js */) || tryExtension(".jsx" /* Jsx */);
         }
-        function parseClassDeclaration(fullStart, decorators, modifiers) {
-            return parseClassDeclarationOrExpression(fullStart, decorators, modifiers, 221 /* ClassDeclaration */);
+        function tryExtension(extension) {
+            var path = tryFile(candidate + extension, failedLookupLocations, onlyRecordFailures, state);
+            return path && { path: path, extension: extension };
         }
-        function parseClassDeclarationOrExpression(fullStart, decorators, modifiers, kind) {
-            var node = createNode(kind, fullStart);
-            node.decorators = decorators;
-            node.modifiers = modifiers;
-            parseExpected(73 /* ClassKeyword */);
-            node.name = parseNameOfClassDeclarationOrExpression();
-            node.typeParameters = parseTypeParameters();
-            node.heritageClauses = parseHeritageClauses(/*isClassHeritageClause*/ true);
-            if (parseExpected(15 /* OpenBraceToken */)) {
-                // ClassTail[Yield,Await] : (Modified) See 14.5
-                //      ClassHeritage[?Yield,?Await]opt { ClassBody[?Yield,?Await]opt }
-                node.members = parseClassMembers();
-                parseExpected(16 /* CloseBraceToken */);
+    }
+    /** Return the file if it exists. */
+    function tryFile(fileName, failedLookupLocations, onlyRecordFailures, state) {
+        if (!onlyRecordFailures) {
+            if (state.host.fileExists(fileName)) {
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.File_0_exist_use_it_as_a_name_resolution_result, fileName);
+                }
+                return fileName;
             }
             else {
-                node.members = createMissingList();
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.File_0_does_not_exist, fileName);
+                }
             }
-            return addJSDocComment(finishNode(node));
         }
-        function parseNameOfClassDeclarationOrExpression() {
-            // implements is a future reserved word so
-            // 'class implements' might mean either
-            // - class expression with omitted name, 'implements' starts heritage clause
-            // - class with name 'implements'
-            // 'isImplementsClause' helps to disambiguate between these two cases
-            return isIdentifier() && !isImplementsClause()
-                ? parseIdentifier()
-                : undefined;
+        failedLookupLocations.push(fileName);
+        return undefined;
+    }
+    function loadNodeModuleFromDirectory(extensions, candidate, failedLookupLocations, onlyRecordFailures, state, considerPackageJson) {
+        if (considerPackageJson === void 0) { considerPackageJson = true; }
+        var directoryExists = !onlyRecordFailures && directoryProbablyExists(candidate, state.host);
+        if (considerPackageJson) {
+            var packageJsonPath = pathToPackageJson(candidate);
+            if (directoryExists && state.host.fileExists(packageJsonPath)) {
+                var fromPackageJson = loadModuleFromPackageJson(packageJsonPath, extensions, candidate, failedLookupLocations, state);
+                if (fromPackageJson) {
+                    return fromPackageJson;
+                }
+            }
+            else {
+                if (directoryExists && state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.File_0_does_not_exist, packageJsonPath);
+                }
+                // record package json as one of failed lookup locations - in the future if this file will appear it will invalidate resolution results
+                failedLookupLocations.push(packageJsonPath);
+            }
         }
-        function isImplementsClause() {
-            return token() === 106 /* ImplementsKeyword */ && lookAhead(nextTokenIsIdentifierOrKeyword);
+        return loadModuleFromFile(extensions, ts.combinePaths(candidate, "index"), failedLookupLocations, !directoryExists, state);
+    }
+    function loadModuleFromPackageJson(packageJsonPath, extensions, candidate, failedLookupLocations, state) {
+        if (state.traceEnabled) {
+            trace(state.host, ts.Diagnostics.Found_package_json_at_0, packageJsonPath);
         }
-        function parseHeritageClauses(isClassHeritageClause) {
-            // ClassTail[Yield,Await] : (Modified) See 14.5
-            //      ClassHeritage[?Yield,?Await]opt { ClassBody[?Yield,?Await]opt }
-            if (isHeritageClause()) {
-                return parseList(20 /* HeritageClauses */, parseHeritageClause);
-            }
+        var file = tryReadPackageJsonFields(extensions !== Extensions.JavaScript, packageJsonPath, candidate, state);
+        if (!file) {
             return undefined;
         }
-        function parseHeritageClause() {
-            if (token() === 83 /* ExtendsKeyword */ || token() === 106 /* ImplementsKeyword */) {
-                var node = createNode(251 /* HeritageClause */);
-                node.token = token();
-                nextToken();
-                node.types = parseDelimitedList(7 /* HeritageClauseElement */, parseExpressionWithTypeArguments);
-                return finishNode(node);
+        var onlyRecordFailures = !directoryProbablyExists(ts.getDirectoryPath(file), state.host);
+        var fromFile = tryFile(file, failedLookupLocations, onlyRecordFailures, state);
+        if (fromFile) {
+            var resolved = fromFile && resolvedIfExtensionMatches(extensions, fromFile);
+            if (resolved) {
+                return resolved;
             }
-            return undefined;
-        }
-        function parseExpressionWithTypeArguments() {
-            var node = createNode(194 /* ExpressionWithTypeArguments */);
-            node.expression = parseLeftHandSideExpressionOrHigher();
-            if (token() === 25 /* LessThanToken */) {
-                node.typeArguments = parseBracketedList(18 /* TypeArguments */, parseType, 25 /* LessThanToken */, 27 /* GreaterThanToken */);
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.File_0_has_an_unsupported_extension_so_skipping_it, fromFile);
             }
-            return finishNode(node);
         }
-        function isHeritageClause() {
-            return token() === 83 /* ExtendsKeyword */ || token() === 106 /* ImplementsKeyword */;
-        }
-        function parseClassMembers() {
-            return parseList(5 /* ClassMembers */, parseClassElement);
+        // Even if extensions is DtsOnly, we can still look up a .ts file as a result of package.json "types"
+        var nextExtensions = extensions === Extensions.DtsOnly ? Extensions.TypeScript : extensions;
+        // Don't do package.json lookup recursively, because Node.js' package lookup doesn't.
+        return nodeLoadModuleByRelativeName(nextExtensions, file, failedLookupLocations, onlyRecordFailures, state, /*considerPackageJson*/ false);
+    }
+    /** Resolve from an arbitrarily specified file. Return `undefined` if it has an unsupported extension. */
+    function resolvedIfExtensionMatches(extensions, path) {
+        var extension = ts.tryGetExtensionFromPath(path);
+        return extension !== undefined && extensionIsOk(extensions, extension) ? { path: path, extension: extension } : undefined;
+    }
+    /** True if `extension` is one of the supported `extensions`. */
+    function extensionIsOk(extensions, extension) {
+        switch (extensions) {
+            case Extensions.JavaScript:
+                return extension === ".js" /* Js */ || extension === ".jsx" /* Jsx */;
+            case Extensions.TypeScript:
+                return extension === ".ts" /* Ts */ || extension === ".tsx" /* Tsx */ || extension === ".d.ts" /* Dts */;
+            case Extensions.DtsOnly:
+                return extension === ".d.ts" /* Dts */;
         }
-        function parseInterfaceDeclaration(fullStart, decorators, modifiers) {
-            var node = createNode(222 /* InterfaceDeclaration */, fullStart);
-            node.decorators = decorators;
-            node.modifiers = modifiers;
-            parseExpected(107 /* InterfaceKeyword */);
-            node.name = parseIdentifier();
-            node.typeParameters = parseTypeParameters();
-            node.heritageClauses = parseHeritageClauses(/*isClassHeritageClause*/ false);
-            node.members = parseObjectTypeMembers();
-            return addJSDocComment(finishNode(node));
+    }
+    function pathToPackageJson(directory) {
+        return ts.combinePaths(directory, "package.json");
+    }
+    function loadModuleFromNodeModulesFolder(extensions, moduleName, nodeModulesFolder, nodeModulesFolderExists, failedLookupLocations, state) {
+        var candidate = ts.normalizePath(ts.combinePaths(nodeModulesFolder, moduleName));
+        return loadModuleFromFile(extensions, candidate, failedLookupLocations, !nodeModulesFolderExists, state) ||
+            loadNodeModuleFromDirectory(extensions, candidate, failedLookupLocations, !nodeModulesFolderExists, state);
+    }
+    function loadModuleFromNodeModules(extensions, moduleName, directory, failedLookupLocations, state, cache) {
+        return loadModuleFromNodeModulesWorker(extensions, moduleName, directory, failedLookupLocations, state, /*typesOnly*/ false, cache);
+    }
+    function loadModuleFromNodeModulesAtTypes(moduleName, directory, failedLookupLocations, state) {
+        // Extensions parameter here doesn't actually matter, because typesOnly ensures we're just doing @types lookup, which is always DtsOnly.
+        return loadModuleFromNodeModulesWorker(Extensions.DtsOnly, moduleName, directory, failedLookupLocations, state, /*typesOnly*/ true, /*cache*/ undefined);
+    }
+    function loadModuleFromNodeModulesWorker(extensions, moduleName, directory, failedLookupLocations, state, typesOnly, cache) {
+        var perModuleNameCache = cache && cache.getOrCreateCacheForModuleName(moduleName);
+        return forEachAncestorDirectory(ts.normalizeSlashes(directory), function (ancestorDirectory) {
+            if (ts.getBaseFileName(ancestorDirectory) !== "node_modules") {
+                var resolutionFromCache = tryFindNonRelativeModuleNameInCache(perModuleNameCache, moduleName, ancestorDirectory, state.traceEnabled, state.host);
+                if (resolutionFromCache) {
+                    return resolutionFromCache;
+                }
+                return toSearchResult(loadModuleFromNodeModulesOneLevel(extensions, moduleName, ancestorDirectory, failedLookupLocations, state, typesOnly));
+            }
+        });
+    }
+    /** Load a module from a single node_modules directory, but not from any ancestors' node_modules directories. */
+    function loadModuleFromNodeModulesOneLevel(extensions, moduleName, directory, failedLookupLocations, state, typesOnly) {
+        if (typesOnly === void 0) { typesOnly = false; }
+        var nodeModulesFolder = ts.combinePaths(directory, "node_modules");
+        var nodeModulesFolderExists = directoryProbablyExists(nodeModulesFolder, state.host);
+        if (!nodeModulesFolderExists && state.traceEnabled) {
+            trace(state.host, ts.Diagnostics.Directory_0_does_not_exist_skipping_all_lookups_in_it, nodeModulesFolder);
         }
-        function parseTypeAliasDeclaration(fullStart, decorators, modifiers) {
-            var node = createNode(223 /* TypeAliasDeclaration */, fullStart);
-            node.decorators = decorators;
-            node.modifiers = modifiers;
-            parseExpected(134 /* TypeKeyword */);
-            node.name = parseIdentifier();
-            node.typeParameters = parseTypeParameters();
-            parseExpected(56 /* EqualsToken */);
-            node.type = parseType();
-            parseSemicolon();
-            return finishNode(node);
+        var packageResult = typesOnly ? undefined : loadModuleFromNodeModulesFolder(extensions, moduleName, nodeModulesFolder, nodeModulesFolderExists, failedLookupLocations, state);
+        if (packageResult) {
+            return packageResult;
         }
-        // In an ambient declaration, the grammar only allows integer literals as initializers.
-        // In a non-ambient declaration, the grammar allows uninitialized members only in a
-        // ConstantEnumMemberSection, which starts at the beginning of an enum declaration
-        // or any time an integer literal initializer is encountered.
-        function parseEnumMember() {
-            var node = createNode(255 /* EnumMember */, scanner.getStartPos());
-            node.name = parsePropertyName();
-            node.initializer = allowInAnd(parseNonParameterInitializer);
-            return addJSDocComment(finishNode(node));
+        if (extensions !== Extensions.JavaScript) {
+            var nodeModulesAtTypes_1 = ts.combinePaths(nodeModulesFolder, "@types");
+            var nodeModulesAtTypesExists = nodeModulesFolderExists;
+            if (nodeModulesFolderExists && !directoryProbablyExists(nodeModulesAtTypes_1, state.host)) {
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.Directory_0_does_not_exist_skipping_all_lookups_in_it, nodeModulesAtTypes_1);
+                }
+                nodeModulesAtTypesExists = false;
+            }
+            return loadModuleFromNodeModulesFolder(Extensions.DtsOnly, mangleScopedPackage(moduleName, state), nodeModulesAtTypes_1, nodeModulesAtTypesExists, failedLookupLocations, state);
         }
-        function parseEnumDeclaration(fullStart, decorators, modifiers) {
-            var node = createNode(224 /* EnumDeclaration */, fullStart);
-            node.decorators = decorators;
-            node.modifiers = modifiers;
-            parseExpected(81 /* EnumKeyword */);
-            node.name = parseIdentifier();
-            if (parseExpected(15 /* OpenBraceToken */)) {
-                node.members = parseDelimitedList(6 /* EnumMembers */, parseEnumMember);
-                parseExpected(16 /* CloseBraceToken */);
+    }
+    /** Double underscores are used in DefinitelyTyped to delimit scoped packages. */
+    var mangledScopedPackageSeparator = "__";
+    /** For a scoped package, we must look in `@types/foo__bar` instead of `@types/@foo/bar`. */
+    function mangleScopedPackage(moduleName, state) {
+        if (ts.startsWith(moduleName, "@")) {
+            var replaceSlash = moduleName.replace(ts.directorySeparator, mangledScopedPackageSeparator);
+            if (replaceSlash !== moduleName) {
+                var mangled = replaceSlash.slice(1); // Take off the "@"
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.Scoped_package_detected_looking_in_0, mangled);
+                }
+                return mangled;
             }
-            else {
-                node.members = createMissingList();
+        }
+        return moduleName;
+    }
+    /* @internal */
+    function getPackageNameFromAtTypesDirectory(mangledName) {
+        var withoutAtTypePrefix = ts.removePrefix(mangledName, "@types/");
+        if (withoutAtTypePrefix !== mangledName) {
+            return withoutAtTypePrefix.indexOf("__") !== -1 ?
+                "@" + withoutAtTypePrefix.replace(mangledScopedPackageSeparator, ts.directorySeparator) :
+                withoutAtTypePrefix;
+        }
+        return mangledName;
+    }
+    ts.getPackageNameFromAtTypesDirectory = getPackageNameFromAtTypesDirectory;
+    function tryFindNonRelativeModuleNameInCache(cache, moduleName, containingDirectory, traceEnabled, host) {
+        var result = cache && cache.get(containingDirectory);
+        if (result) {
+            if (traceEnabled) {
+                trace(host, ts.Diagnostics.Resolution_for_module_0_was_found_in_cache, moduleName);
             }
-            return addJSDocComment(finishNode(node));
+            return { value: result.resolvedModule && { path: result.resolvedModule.resolvedFileName, extension: result.resolvedModule.extension } };
         }
-        function parseModuleBlock() {
-            var node = createNode(226 /* ModuleBlock */, scanner.getStartPos());
-            if (parseExpected(15 /* OpenBraceToken */)) {
-                node.statements = parseList(1 /* BlockStatements */, parseStatement);
-                parseExpected(16 /* CloseBraceToken */);
+    }
+    function classicNameResolver(moduleName, containingFile, compilerOptions, host, cache) {
+        var traceEnabled = isTraceEnabled(compilerOptions, host);
+        var state = { compilerOptions: compilerOptions, host: host, traceEnabled: traceEnabled };
+        var failedLookupLocations = [];
+        var containingDirectory = ts.getDirectoryPath(containingFile);
+        var resolved = tryResolve(Extensions.TypeScript) || tryResolve(Extensions.JavaScript);
+        return createResolvedModuleWithFailedLookupLocations(resolved && resolved.value, /*isExternalLibraryImport*/ false, failedLookupLocations);
+        function tryResolve(extensions) {
+            var resolvedUsingSettings = tryLoadModuleUsingOptionalResolutionSettings(extensions, moduleName, containingDirectory, loadModuleFromFile, failedLookupLocations, state);
+            if (resolvedUsingSettings) {
+                return { value: resolvedUsingSettings };
+            }
+            var perModuleNameCache = cache && cache.getOrCreateCacheForModuleName(moduleName);
+            if (moduleHasNonRelativeName(moduleName)) {
+                // Climb up parent directories looking for a module.
+                var resolved_3 = forEachAncestorDirectory(containingDirectory, function (directory) {
+                    var resolutionFromCache = tryFindNonRelativeModuleNameInCache(perModuleNameCache, moduleName, directory, traceEnabled, host);
+                    if (resolutionFromCache) {
+                        return resolutionFromCache;
+                    }
+                    var searchName = ts.normalizePath(ts.combinePaths(directory, moduleName));
+                    return toSearchResult(loadModuleFromFile(extensions, searchName, failedLookupLocations, /*onlyRecordFailures*/ false, state));
+                });
+                if (resolved_3) {
+                    return resolved_3;
+                }
+                if (extensions === Extensions.TypeScript) {
+                    // If we didn't find the file normally, look it up in @types.
+                    return loadModuleFromNodeModulesAtTypes(moduleName, containingDirectory, failedLookupLocations, state);
+                }
             }
             else {
-                node.statements = createMissingList();
+                var candidate = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
+                return toSearchResult(loadModuleFromFile(extensions, candidate, failedLookupLocations, /*onlyRecordFailures*/ false, state));
             }
-            return finishNode(node);
         }
-        function parseModuleOrNamespaceDeclaration(fullStart, decorators, modifiers, flags) {
-            var node = createNode(225 /* ModuleDeclaration */, fullStart);
-            // If we are parsing a dotted namespace name, we want to
-            // propagate the 'Namespace' flag across the names if set.
-            var namespaceFlag = flags & 16 /* Namespace */;
-            node.decorators = decorators;
-            node.modifiers = modifiers;
-            node.flags |= flags;
-            node.name = parseIdentifier();
-            node.body = parseOptional(21 /* DotToken */)
-                ? parseModuleOrNamespaceDeclaration(getNodePos(), /*decorators*/ undefined, /*modifiers*/ undefined, 4 /* NestedNamespace */ | namespaceFlag)
-                : parseModuleBlock();
-            return addJSDocComment(finishNode(node));
+    }
+    ts.classicNameResolver = classicNameResolver;
+    /**
+     * LSHost may load a module from a global cache of typings.
+     * This is the minumum code needed to expose that functionality; the rest is in LSHost.
+     */
+    /* @internal */
+    function loadModuleFromGlobalCache(moduleName, projectName, compilerOptions, host, globalCache) {
+        var traceEnabled = isTraceEnabled(compilerOptions, host);
+        if (traceEnabled) {
+            trace(host, ts.Diagnostics.Auto_discovery_for_typings_is_enabled_in_project_0_Running_extra_resolution_pass_for_module_1_using_cache_location_2, projectName, moduleName, globalCache);
         }
-        function parseAmbientExternalModuleDeclaration(fullStart, decorators, modifiers) {
-            var node = createNode(225 /* ModuleDeclaration */, fullStart);
-            node.decorators = decorators;
-            node.modifiers = modifiers;
-            if (token() === 137 /* GlobalKeyword */) {
-                // parse 'global' as name of global scope augmentation
-                node.name = parseIdentifier();
-                node.flags |= 512 /* GlobalAugmentation */;
-            }
-            else {
-                node.name = parseLiteralNode(/*internName*/ true);
-            }
-            if (token() === 15 /* OpenBraceToken */) {
-                node.body = parseModuleBlock();
+        var state = { compilerOptions: compilerOptions, host: host, traceEnabled: traceEnabled };
+        var failedLookupLocations = [];
+        var resolved = loadModuleFromNodeModulesOneLevel(Extensions.DtsOnly, moduleName, globalCache, failedLookupLocations, state);
+        return createResolvedModuleWithFailedLookupLocations(resolved, /*isExternalLibraryImport*/ true, failedLookupLocations);
+    }
+    ts.loadModuleFromGlobalCache = loadModuleFromGlobalCache;
+    /**
+     * Wraps value to SearchResult.
+     * @returns undefined if value is undefined or { value } otherwise
+     */
+    function toSearchResult(value) {
+        return value !== undefined ? { value: value } : undefined;
+    }
+    /** Calls `callback` on `directory` and every ancestor directory it has, returning the first defined result. */
+    function forEachAncestorDirectory(directory, callback) {
+        while (true) {
+            var result = callback(directory);
+            if (result !== undefined) {
+                return result;
             }
-            else {
-                parseSemicolon();
+            var parentPath = ts.getDirectoryPath(directory);
+            if (parentPath === directory) {
+                return undefined;
             }
-            return finishNode(node);
+            directory = parentPath;
         }
-        function parseModuleDeclaration(fullStart, decorators, modifiers) {
-            var flags = 0;
-            if (token() === 137 /* GlobalKeyword */) {
-                // global augmentation
-                return parseAmbientExternalModuleDeclaration(fullStart, decorators, modifiers);
-            }
-            else if (parseOptional(126 /* NamespaceKeyword */)) {
-                flags |= 16 /* Namespace */;
-            }
-            else {
-                parseExpected(125 /* ModuleKeyword */);
-                if (token() === 9 /* StringLiteral */) {
-                    return parseAmbientExternalModuleDeclaration(fullStart, decorators, modifiers);
+    }
+})(ts || (ts = {}));
+/// <reference path="moduleNameResolver.ts"/>
+/// <reference path="binder.ts"/>
+/* @internal */
+var ts;
+(function (ts) {
+    var ambientModuleSymbolRegex = /^".+"$/;
+    var nextSymbolId = 1;
+    var nextNodeId = 1;
+    var nextMergeId = 1;
+    var nextFlowId = 1;
+    function getNodeId(node) {
+        if (!node.id) {
+            node.id = nextNodeId;
+            nextNodeId++;
+        }
+        return node.id;
+    }
+    ts.getNodeId = getNodeId;
+    function getSymbolId(symbol) {
+        if (!symbol.id) {
+            symbol.id = nextSymbolId;
+            nextSymbolId++;
+        }
+        return symbol.id;
+    }
+    ts.getSymbolId = getSymbolId;
+    function isInstantiatedModule(node, preserveConstEnums) {
+        var moduleState = ts.getModuleInstanceState(node);
+        return moduleState === 1 /* Instantiated */ ||
+            (preserveConstEnums && moduleState === 2 /* ConstEnumOnly */);
+    }
+    ts.isInstantiatedModule = isInstantiatedModule;
+    function createTypeChecker(host, produceDiagnostics) {
+        // Cancellation that controls whether or not we can cancel in the middle of type checking.
+        // In general cancelling is *not* safe for the type checker.  We might be in the middle of
+        // computing something, and we will leave our internals in an inconsistent state.  Callers
+        // who set the cancellation token should catch if a cancellation exception occurs, and
+        // should throw away and create a new TypeChecker.
+        //
+        // Currently we only support setting the cancellation token when getting diagnostics.  This
+        // is because diagnostics can be quite expensive, and we want to allow hosts to bail out if
+        // they no longer need the information (for example, if the user started editing again).
+        var cancellationToken;
+        var requestedExternalEmitHelpers;
+        var externalHelpersModule;
+        var Symbol = ts.objectAllocator.getSymbolConstructor();
+        var Type = ts.objectAllocator.getTypeConstructor();
+        var Signature = ts.objectAllocator.getSignatureConstructor();
+        var typeCount = 0;
+        var symbolCount = 0;
+        var enumCount = 0;
+        var symbolInstantiationDepth = 0;
+        var emptyArray = [];
+        var emptySymbols = ts.createMap();
+        var compilerOptions = host.getCompilerOptions();
+        var languageVersion = ts.getEmitScriptTarget(compilerOptions);
+        var modulekind = ts.getEmitModuleKind(compilerOptions);
+        var noUnusedIdentifiers = !!compilerOptions.noUnusedLocals || !!compilerOptions.noUnusedParameters;
+        var allowSyntheticDefaultImports = typeof compilerOptions.allowSyntheticDefaultImports !== "undefined" ? compilerOptions.allowSyntheticDefaultImports : modulekind === ts.ModuleKind.System;
+        var strictNullChecks = compilerOptions.strictNullChecks === undefined ? compilerOptions.strict : compilerOptions.strictNullChecks;
+        var noImplicitAny = compilerOptions.noImplicitAny === undefined ? compilerOptions.strict : compilerOptions.noImplicitAny;
+        var noImplicitThis = compilerOptions.noImplicitThis === undefined ? compilerOptions.strict : compilerOptions.noImplicitThis;
+        var emitResolver = createResolver();
+        var nodeBuilder = createNodeBuilder();
+        var undefinedSymbol = createSymbol(4 /* Property */, "undefined");
+        undefinedSymbol.declarations = [];
+        var argumentsSymbol = createSymbol(4 /* Property */, "arguments");
+        // for public members that accept a Node or one of its subtypes, we must guard against
+        // synthetic nodes created during transformations by calling `getParseTreeNode`.
+        // for most of these, we perform the guard only on `checker` to avoid any possible
+        // extra cost of calling `getParseTreeNode` when calling these functions from inside the
+        // checker.
+        var checker = {
+            getNodeCount: function () { return ts.sum(host.getSourceFiles(), "nodeCount"); },
+            getIdentifierCount: function () { return ts.sum(host.getSourceFiles(), "identifierCount"); },
+            getSymbolCount: function () { return ts.sum(host.getSourceFiles(), "symbolCount") + symbolCount; },
+            getTypeCount: function () { return typeCount; },
+            isUndefinedSymbol: function (symbol) { return symbol === undefinedSymbol; },
+            isArgumentsSymbol: function (symbol) { return symbol === argumentsSymbol; },
+            isUnknownSymbol: function (symbol) { return symbol === unknownSymbol; },
+            getMergedSymbol: getMergedSymbol,
+            getDiagnostics: getDiagnostics,
+            getGlobalDiagnostics: getGlobalDiagnostics,
+            getTypeOfSymbolAtLocation: function (symbol, location) {
+                location = ts.getParseTreeNode(location);
+                return location ? getTypeOfSymbolAtLocation(symbol, location) : unknownType;
+            },
+            getSymbolsOfParameterPropertyDeclaration: function (parameter, parameterName) {
+                parameter = ts.getParseTreeNode(parameter, ts.isParameter);
+                ts.Debug.assert(parameter !== undefined, "Cannot get symbols of a synthetic parameter that cannot be resolved to a parse-tree node.");
+                return getSymbolsOfParameterPropertyDeclaration(parameter, parameterName);
+            },
+            getDeclaredTypeOfSymbol: getDeclaredTypeOfSymbol,
+            getPropertiesOfType: getPropertiesOfType,
+            getPropertyOfType: getPropertyOfType,
+            getIndexInfoOfType: getIndexInfoOfType,
+            getSignaturesOfType: getSignaturesOfType,
+            getIndexTypeOfType: getIndexTypeOfType,
+            getBaseTypes: getBaseTypes,
+            getBaseTypeOfLiteralType: getBaseTypeOfLiteralType,
+            getWidenedType: getWidenedType,
+            getTypeFromTypeNode: function (node) {
+                node = ts.getParseTreeNode(node, ts.isTypeNode);
+                return node ? getTypeFromTypeNode(node) : unknownType;
+            },
+            getParameterType: getTypeAtPosition,
+            getReturnTypeOfSignature: getReturnTypeOfSignature,
+            getNonNullableType: getNonNullableType,
+            typeToTypeNode: nodeBuilder.typeToTypeNode,
+            indexInfoToIndexSignatureDeclaration: nodeBuilder.indexInfoToIndexSignatureDeclaration,
+            signatureToSignatureDeclaration: nodeBuilder.signatureToSignatureDeclaration,
+            getSymbolsInScope: function (location, meaning) {
+                location = ts.getParseTreeNode(location);
+                return location ? getSymbolsInScope(location, meaning) : [];
+            },
+            getSymbolAtLocation: function (node) {
+                node = ts.getParseTreeNode(node);
+                return node ? getSymbolAtLocation(node) : undefined;
+            },
+            getShorthandAssignmentValueSymbol: function (node) {
+                node = ts.getParseTreeNode(node);
+                return node ? getShorthandAssignmentValueSymbol(node) : undefined;
+            },
+            getExportSpecifierLocalTargetSymbol: function (node) {
+                node = ts.getParseTreeNode(node, ts.isExportSpecifier);
+                return node ? getExportSpecifierLocalTargetSymbol(node) : undefined;
+            },
+            getTypeAtLocation: function (node) {
+                node = ts.getParseTreeNode(node);
+                return node ? getTypeOfNode(node) : unknownType;
+            },
+            getPropertySymbolOfDestructuringAssignment: function (location) {
+                location = ts.getParseTreeNode(location, ts.isIdentifier);
+                return location ? getPropertySymbolOfDestructuringAssignment(location) : undefined;
+            },
+            signatureToString: function (signature, enclosingDeclaration, flags, kind) {
+                return signatureToString(signature, ts.getParseTreeNode(enclosingDeclaration), flags, kind);
+            },
+            typeToString: function (type, enclosingDeclaration, flags) {
+                return typeToString(type, ts.getParseTreeNode(enclosingDeclaration), flags);
+            },
+            getSymbolDisplayBuilder: getSymbolDisplayBuilder,
+            symbolToString: function (symbol, enclosingDeclaration, meaning) {
+                return symbolToString(symbol, ts.getParseTreeNode(enclosingDeclaration), meaning);
+            },
+            getAugmentedPropertiesOfType: getAugmentedPropertiesOfType,
+            getRootSymbols: getRootSymbols,
+            getContextualType: function (node) {
+                node = ts.getParseTreeNode(node, ts.isExpression);
+                return node ? getContextualType(node) : undefined;
+            },
+            getFullyQualifiedName: getFullyQualifiedName,
+            getResolvedSignature: function (node, candidatesOutArray) {
+                node = ts.getParseTreeNode(node, ts.isCallLikeExpression);
+                return node ? getResolvedSignature(node, candidatesOutArray) : undefined;
+            },
+            getConstantValue: function (node) {
+                node = ts.getParseTreeNode(node, canHaveConstantValue);
+                return node ? getConstantValue(node) : undefined;
+            },
+            isValidPropertyAccess: function (node, propertyName) {
+                node = ts.getParseTreeNode(node, ts.isPropertyAccessOrQualifiedName);
+                return node ? isValidPropertyAccess(node, propertyName) : false;
+            },
+            getSignatureFromDeclaration: function (declaration) {
+                declaration = ts.getParseTreeNode(declaration, ts.isFunctionLike);
+                return declaration ? getSignatureFromDeclaration(declaration) : undefined;
+            },
+            isImplementationOfOverload: function (node) {
+                node = ts.getParseTreeNode(node, ts.isFunctionLike);
+                return node ? isImplementationOfOverload(node) : undefined;
+            },
+            getImmediateAliasedSymbol: function (symbol) {
+                ts.Debug.assert((symbol.flags & 8388608 /* Alias */) !== 0, "Should only get Alias here.");
+                var links = getSymbolLinks(symbol);
+                if (!links.immediateTarget) {
+                    var node = getDeclarationOfAliasSymbol(symbol);
+                    ts.Debug.assert(!!node);
+                    links.immediateTarget = getTargetOfAliasDeclaration(node, /*dontRecursivelyResolve*/ true);
+                }
+                return links.immediateTarget;
+            },
+            getAliasedSymbol: resolveAlias,
+            getEmitResolver: getEmitResolver,
+            getExportsOfModule: getExportsOfModuleAsArray,
+            getExportsAndPropertiesOfModule: getExportsAndPropertiesOfModule,
+            getAmbientModules: getAmbientModules,
+            getAllAttributesTypeFromJsxOpeningLikeElement: function (node) {
+                node = ts.getParseTreeNode(node, ts.isJsxOpeningLikeElement);
+                return node ? getAllAttributesTypeFromJsxOpeningLikeElement(node) : undefined;
+            },
+            getJsxIntrinsicTagNames: getJsxIntrinsicTagNames,
+            isOptionalParameter: function (node) {
+                node = ts.getParseTreeNode(node, ts.isParameter);
+                return node ? isOptionalParameter(node) : false;
+            },
+            tryGetMemberInModuleExports: tryGetMemberInModuleExports,
+            tryFindAmbientModuleWithoutAugmentations: function (moduleName) {
+                // we deliberately exclude augmentations
+                // since we are only interested in declarations of the module itself
+                return tryFindAmbientModule(moduleName, /*withAugmentations*/ false);
+            },
+            getApparentType: getApparentType,
+            getAllPossiblePropertiesOfType: getAllPossiblePropertiesOfType,
+            getSuggestionForNonexistentProperty: getSuggestionForNonexistentProperty,
+            getSuggestionForNonexistentSymbol: getSuggestionForNonexistentSymbol,
+            getBaseConstraintOfType: getBaseConstraintOfType,
+            getJsxNamespace: getJsxNamespace,
+            resolveNameAtLocation: function (location, name, meaning) {
+                location = ts.getParseTreeNode(location);
+                return resolveName(location, name, meaning, /*nameNotFoundMessage*/ undefined, name);
+            },
+        };
+        var tupleTypes = [];
+        var unionTypes = ts.createMap();
+        var intersectionTypes = ts.createMap();
+        var literalTypes = ts.createMap();
+        var indexedAccessTypes = ts.createMap();
+        var evolvingArrayTypes = [];
+        var unknownSymbol = createSymbol(4 /* Property */, "unknown");
+        var resolvingSymbol = createSymbol(0, "__resolving__");
+        var anyType = createIntrinsicType(1 /* Any */, "any");
+        var autoType = createIntrinsicType(1 /* Any */, "any");
+        var unknownType = createIntrinsicType(1 /* Any */, "unknown");
+        var undefinedType = createIntrinsicType(2048 /* Undefined */, "undefined");
+        var undefinedWideningType = strictNullChecks ? undefinedType : createIntrinsicType(2048 /* Undefined */ | 2097152 /* ContainsWideningType */, "undefined");
+        var nullType = createIntrinsicType(4096 /* Null */, "null");
+        var nullWideningType = strictNullChecks ? nullType : createIntrinsicType(4096 /* Null */ | 2097152 /* ContainsWideningType */, "null");
+        var stringType = createIntrinsicType(2 /* String */, "string");
+        var numberType = createIntrinsicType(4 /* Number */, "number");
+        var trueType = createIntrinsicType(128 /* BooleanLiteral */, "true");
+        var falseType = createIntrinsicType(128 /* BooleanLiteral */, "false");
+        var booleanType = createBooleanType([trueType, falseType]);
+        var esSymbolType = createIntrinsicType(512 /* ESSymbol */, "symbol");
+        var voidType = createIntrinsicType(1024 /* Void */, "void");
+        var neverType = createIntrinsicType(8192 /* Never */, "never");
+        var silentNeverType = createIntrinsicType(8192 /* Never */, "never");
+        var nonPrimitiveType = createIntrinsicType(16777216 /* NonPrimitive */, "object");
+        var emptyObjectType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
+        var emptyTypeLiteralSymbol = createSymbol(2048 /* TypeLiteral */, "__type");
+        emptyTypeLiteralSymbol.members = ts.createMap();
+        var emptyTypeLiteralType = createAnonymousType(emptyTypeLiteralSymbol, emptySymbols, emptyArray, emptyArray, undefined, undefined);
+        var emptyGenericType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
+        emptyGenericType.instantiations = ts.createMap();
+        var anyFunctionType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
+        // The anyFunctionType contains the anyFunctionType by definition. The flag is further propagated
+        // in getPropagatingFlagsOfTypes, and it is checked in inferFromTypes.
+        anyFunctionType.flags |= 8388608 /* ContainsAnyFunctionType */;
+        var noConstraintType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
+        var circularConstraintType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
+        var anySignature = createSignature(undefined, undefined, undefined, emptyArray, anyType, /*typePredicate*/ undefined, 0, /*hasRestParameter*/ false, /*hasLiteralTypes*/ false);
+        var unknownSignature = createSignature(undefined, undefined, undefined, emptyArray, unknownType, /*typePredicate*/ undefined, 0, /*hasRestParameter*/ false, /*hasLiteralTypes*/ false);
+        var resolvingSignature = createSignature(undefined, undefined, undefined, emptyArray, anyType, /*typePredicate*/ undefined, 0, /*hasRestParameter*/ false, /*hasLiteralTypes*/ false);
+        var silentNeverSignature = createSignature(undefined, undefined, undefined, emptyArray, silentNeverType, /*typePredicate*/ undefined, 0, /*hasRestParameter*/ false, /*hasLiteralTypes*/ false);
+        var enumNumberIndexInfo = createIndexInfo(stringType, /*isReadonly*/ true);
+        var jsObjectLiteralIndexInfo = createIndexInfo(anyType, /*isReadonly*/ false);
+        var globals = ts.createMap();
+        /**
+         * List of every ambient module with a "*" wildcard.
+         * Unlike other ambient modules, these can't be stored in `globals` because symbol tables only deal with exact matches.
+         * This is only used if there is no exact match.
+         */
+        var patternAmbientModules;
+        var globalObjectType;
+        var globalFunctionType;
+        var globalArrayType;
+        var globalReadonlyArrayType;
+        var globalStringType;
+        var globalNumberType;
+        var globalBooleanType;
+        var globalRegExpType;
+        var globalThisType;
+        var anyArrayType;
+        var autoArrayType;
+        var anyReadonlyArrayType;
+        // The library files are only loaded when the feature is used.
+        // This allows users to just specify library files they want to used through --lib
+        // and they will not get an error from not having unrelated library files
+        var deferredGlobalESSymbolConstructorSymbol;
+        var deferredGlobalESSymbolType;
+        var deferredGlobalTypedPropertyDescriptorType;
+        var deferredGlobalPromiseType;
+        var deferredGlobalPromiseConstructorSymbol;
+        var deferredGlobalPromiseConstructorLikeType;
+        var deferredGlobalIterableType;
+        var deferredGlobalIteratorType;
+        var deferredGlobalIterableIteratorType;
+        var deferredGlobalAsyncIterableType;
+        var deferredGlobalAsyncIteratorType;
+        var deferredGlobalAsyncIterableIteratorType;
+        var deferredGlobalTemplateStringsArrayType;
+        var deferredJsxElementClassType;
+        var deferredJsxElementType;
+        var deferredJsxStatelessElementType;
+        var deferredNodes;
+        var deferredUnusedIdentifierNodes;
+        var flowLoopStart = 0;
+        var flowLoopCount = 0;
+        var visitedFlowCount = 0;
+        var emptyStringType = getLiteralType("");
+        var zeroType = getLiteralType(0);
+        var resolutionTargets = [];
+        var resolutionResults = [];
+        var resolutionPropertyNames = [];
+        var suggestionCount = 0;
+        var maximumSuggestionCount = 10;
+        var mergedSymbols = [];
+        var symbolLinks = [];
+        var nodeLinks = [];
+        var flowLoopCaches = [];
+        var flowLoopNodes = [];
+        var flowLoopKeys = [];
+        var flowLoopTypes = [];
+        var visitedFlowNodes = [];
+        var visitedFlowTypes = [];
+        var potentialThisCollisions = [];
+        var potentialNewTargetCollisions = [];
+        var awaitedTypeStack = [];
+        var diagnostics = ts.createDiagnosticCollection();
+        var TypeFacts;
+        (function (TypeFacts) {
+            TypeFacts[TypeFacts["None"] = 0] = "None";
+            TypeFacts[TypeFacts["TypeofEQString"] = 1] = "TypeofEQString";
+            TypeFacts[TypeFacts["TypeofEQNumber"] = 2] = "TypeofEQNumber";
+            TypeFacts[TypeFacts["TypeofEQBoolean"] = 4] = "TypeofEQBoolean";
+            TypeFacts[TypeFacts["TypeofEQSymbol"] = 8] = "TypeofEQSymbol";
+            TypeFacts[TypeFacts["TypeofEQObject"] = 16] = "TypeofEQObject";
+            TypeFacts[TypeFacts["TypeofEQFunction"] = 32] = "TypeofEQFunction";
+            TypeFacts[TypeFacts["TypeofEQHostObject"] = 64] = "TypeofEQHostObject";
+            TypeFacts[TypeFacts["TypeofNEString"] = 128] = "TypeofNEString";
+            TypeFacts[TypeFacts["TypeofNENumber"] = 256] = "TypeofNENumber";
+            TypeFacts[TypeFacts["TypeofNEBoolean"] = 512] = "TypeofNEBoolean";
+            TypeFacts[TypeFacts["TypeofNESymbol"] = 1024] = "TypeofNESymbol";
+            TypeFacts[TypeFacts["TypeofNEObject"] = 2048] = "TypeofNEObject";
+            TypeFacts[TypeFacts["TypeofNEFunction"] = 4096] = "TypeofNEFunction";
+            TypeFacts[TypeFacts["TypeofNEHostObject"] = 8192] = "TypeofNEHostObject";
+            TypeFacts[TypeFacts["EQUndefined"] = 16384] = "EQUndefined";
+            TypeFacts[TypeFacts["EQNull"] = 32768] = "EQNull";
+            TypeFacts[TypeFacts["EQUndefinedOrNull"] = 65536] = "EQUndefinedOrNull";
+            TypeFacts[TypeFacts["NEUndefined"] = 131072] = "NEUndefined";
+            TypeFacts[TypeFacts["NENull"] = 262144] = "NENull";
+            TypeFacts[TypeFacts["NEUndefinedOrNull"] = 524288] = "NEUndefinedOrNull";
+            TypeFacts[TypeFacts["Truthy"] = 1048576] = "Truthy";
+            TypeFacts[TypeFacts["Falsy"] = 2097152] = "Falsy";
+            TypeFacts[TypeFacts["Discriminatable"] = 4194304] = "Discriminatable";
+            TypeFacts[TypeFacts["All"] = 8388607] = "All";
+            // The following members encode facts about particular kinds of types for use in the getTypeFacts function.
+            // The presence of a particular fact means that the given test is true for some (and possibly all) values
+            // of that kind of type.
+            TypeFacts[TypeFacts["BaseStringStrictFacts"] = 933633] = "BaseStringStrictFacts";
+            TypeFacts[TypeFacts["BaseStringFacts"] = 3145473] = "BaseStringFacts";
+            TypeFacts[TypeFacts["StringStrictFacts"] = 4079361] = "StringStrictFacts";
+            TypeFacts[TypeFacts["StringFacts"] = 4194049] = "StringFacts";
+            TypeFacts[TypeFacts["EmptyStringStrictFacts"] = 3030785] = "EmptyStringStrictFacts";
+            TypeFacts[TypeFacts["EmptyStringFacts"] = 3145473] = "EmptyStringFacts";
+            TypeFacts[TypeFacts["NonEmptyStringStrictFacts"] = 1982209] = "NonEmptyStringStrictFacts";
+            TypeFacts[TypeFacts["NonEmptyStringFacts"] = 4194049] = "NonEmptyStringFacts";
+            TypeFacts[TypeFacts["BaseNumberStrictFacts"] = 933506] = "BaseNumberStrictFacts";
+            TypeFacts[TypeFacts["BaseNumberFacts"] = 3145346] = "BaseNumberFacts";
+            TypeFacts[TypeFacts["NumberStrictFacts"] = 4079234] = "NumberStrictFacts";
+            TypeFacts[TypeFacts["NumberFacts"] = 4193922] = "NumberFacts";
+            TypeFacts[TypeFacts["ZeroStrictFacts"] = 3030658] = "ZeroStrictFacts";
+            TypeFacts[TypeFacts["ZeroFacts"] = 3145346] = "ZeroFacts";
+            TypeFacts[TypeFacts["NonZeroStrictFacts"] = 1982082] = "NonZeroStrictFacts";
+            TypeFacts[TypeFacts["NonZeroFacts"] = 4193922] = "NonZeroFacts";
+            TypeFacts[TypeFacts["BaseBooleanStrictFacts"] = 933252] = "BaseBooleanStrictFacts";
+            TypeFacts[TypeFacts["BaseBooleanFacts"] = 3145092] = "BaseBooleanFacts";
+            TypeFacts[TypeFacts["BooleanStrictFacts"] = 4078980] = "BooleanStrictFacts";
+            TypeFacts[TypeFacts["BooleanFacts"] = 4193668] = "BooleanFacts";
+            TypeFacts[TypeFacts["FalseStrictFacts"] = 3030404] = "FalseStrictFacts";
+            TypeFacts[TypeFacts["FalseFacts"] = 3145092] = "FalseFacts";
+            TypeFacts[TypeFacts["TrueStrictFacts"] = 1981828] = "TrueStrictFacts";
+            TypeFacts[TypeFacts["TrueFacts"] = 4193668] = "TrueFacts";
+            TypeFacts[TypeFacts["SymbolStrictFacts"] = 1981320] = "SymbolStrictFacts";
+            TypeFacts[TypeFacts["SymbolFacts"] = 4193160] = "SymbolFacts";
+            TypeFacts[TypeFacts["ObjectStrictFacts"] = 6166480] = "ObjectStrictFacts";
+            TypeFacts[TypeFacts["ObjectFacts"] = 8378320] = "ObjectFacts";
+            TypeFacts[TypeFacts["FunctionStrictFacts"] = 6164448] = "FunctionStrictFacts";
+            TypeFacts[TypeFacts["FunctionFacts"] = 8376288] = "FunctionFacts";
+            TypeFacts[TypeFacts["UndefinedFacts"] = 2457472] = "UndefinedFacts";
+            TypeFacts[TypeFacts["NullFacts"] = 2340752] = "NullFacts";
+        })(TypeFacts || (TypeFacts = {}));
+        var typeofEQFacts = ts.createMapFromTemplate({
+            "string": 1 /* TypeofEQString */,
+            "number": 2 /* TypeofEQNumber */,
+            "boolean": 4 /* TypeofEQBoolean */,
+            "symbol": 8 /* TypeofEQSymbol */,
+            "undefined": 16384 /* EQUndefined */,
+            "object": 16 /* TypeofEQObject */,
+            "function": 32 /* TypeofEQFunction */
+        });
+        var typeofNEFacts = ts.createMapFromTemplate({
+            "string": 128 /* TypeofNEString */,
+            "number": 256 /* TypeofNENumber */,
+            "boolean": 512 /* TypeofNEBoolean */,
+            "symbol": 1024 /* TypeofNESymbol */,
+            "undefined": 131072 /* NEUndefined */,
+            "object": 2048 /* TypeofNEObject */,
+            "function": 4096 /* TypeofNEFunction */
+        });
+        var typeofTypesByName = ts.createMapFromTemplate({
+            "string": stringType,
+            "number": numberType,
+            "boolean": booleanType,
+            "symbol": esSymbolType,
+            "undefined": undefinedType
+        });
+        var typeofType = createTypeofType();
+        var _jsxNamespace;
+        var _jsxFactoryEntity;
+        var _jsxElementPropertiesName;
+        var _hasComputedJsxElementPropertiesName = false;
+        var _jsxElementChildrenPropertyName;
+        var _hasComputedJsxElementChildrenPropertyName = false;
+        /** Things we lazy load from the JSX namespace */
+        var jsxTypes = ts.createMap();
+        var JsxNames = {
+            JSX: "JSX",
+            IntrinsicElements: "IntrinsicElements",
+            ElementClass: "ElementClass",
+            ElementAttributesPropertyNameContainer: "ElementAttributesProperty",
+            ElementChildrenAttributeNameContainer: "ElementChildrenAttribute",
+            Element: "Element",
+            IntrinsicAttributes: "IntrinsicAttributes",
+            IntrinsicClassAttributes: "IntrinsicClassAttributes"
+        };
+        var subtypeRelation = ts.createMap();
+        var assignableRelation = ts.createMap();
+        var comparableRelation = ts.createMap();
+        var identityRelation = ts.createMap();
+        var enumRelation = ts.createMap();
+        // This is for caching the result of getSymbolDisplayBuilder. Do not access directly.
+        var _displayBuilder;
+        var TypeSystemPropertyName;
+        (function (TypeSystemPropertyName) {
+            TypeSystemPropertyName[TypeSystemPropertyName["Type"] = 0] = "Type";
+            TypeSystemPropertyName[TypeSystemPropertyName["ResolvedBaseConstructorType"] = 1] = "ResolvedBaseConstructorType";
+            TypeSystemPropertyName[TypeSystemPropertyName["DeclaredType"] = 2] = "DeclaredType";
+            TypeSystemPropertyName[TypeSystemPropertyName["ResolvedReturnType"] = 3] = "ResolvedReturnType";
+        })(TypeSystemPropertyName || (TypeSystemPropertyName = {}));
+        var CheckMode;
+        (function (CheckMode) {
+            CheckMode[CheckMode["Normal"] = 0] = "Normal";
+            CheckMode[CheckMode["SkipContextSensitive"] = 1] = "SkipContextSensitive";
+            CheckMode[CheckMode["Inferential"] = 2] = "Inferential";
+        })(CheckMode || (CheckMode = {}));
+        var builtinGlobals = ts.createMap();
+        builtinGlobals.set(undefinedSymbol.name, undefinedSymbol);
+        initializeTypeChecker();
+        return checker;
+        function getJsxNamespace() {
+            if (!_jsxNamespace) {
+                _jsxNamespace = "React";
+                if (compilerOptions.jsxFactory) {
+                    _jsxFactoryEntity = ts.parseIsolatedEntityName(compilerOptions.jsxFactory, languageVersion);
+                    if (_jsxFactoryEntity) {
+                        _jsxNamespace = getFirstIdentifier(_jsxFactoryEntity).text;
+                    }
                 }
-            }
-            return parseModuleOrNamespaceDeclaration(fullStart, decorators, modifiers, flags);
-        }
-        function isExternalModuleReference() {
-            return token() === 129 /* RequireKeyword */ &&
-                lookAhead(nextTokenIsOpenParen);
-        }
-        function nextTokenIsOpenParen() {
-            return nextToken() === 17 /* OpenParenToken */;
-        }
-        function nextTokenIsSlash() {
-            return nextToken() === 39 /* SlashToken */;
-        }
-        function parseNamespaceExportDeclaration(fullStart, decorators, modifiers) {
-            var exportDeclaration = createNode(228 /* NamespaceExportDeclaration */, fullStart);
-            exportDeclaration.decorators = decorators;
-            exportDeclaration.modifiers = modifiers;
-            parseExpected(116 /* AsKeyword */);
-            parseExpected(126 /* NamespaceKeyword */);
-            exportDeclaration.name = parseIdentifier();
-            parseExpected(23 /* SemicolonToken */);
-            return finishNode(exportDeclaration);
-        }
-        function parseImportDeclarationOrImportEqualsDeclaration(fullStart, decorators, modifiers) {
-            parseExpected(89 /* ImportKeyword */);
-            var afterImportPos = scanner.getStartPos();
-            var identifier;
-            if (isIdentifier()) {
-                identifier = parseIdentifier();
-                if (token() !== 24 /* CommaToken */ && token() !== 136 /* FromKeyword */) {
-                    // ImportEquals declaration of type:
-                    // import x = require("mod"); or
-                    // import x = M.x;
-                    var importEqualsDeclaration = createNode(229 /* ImportEqualsDeclaration */, fullStart);
-                    importEqualsDeclaration.decorators = decorators;
-                    importEqualsDeclaration.modifiers = modifiers;
-                    importEqualsDeclaration.name = identifier;
-                    parseExpected(56 /* EqualsToken */);
-                    importEqualsDeclaration.moduleReference = parseModuleReference();
-                    parseSemicolon();
-                    return addJSDocComment(finishNode(importEqualsDeclaration));
+                else if (compilerOptions.reactNamespace) {
+                    _jsxNamespace = compilerOptions.reactNamespace;
                 }
             }
-            // Import statement
-            var importDeclaration = createNode(230 /* ImportDeclaration */, fullStart);
-            importDeclaration.decorators = decorators;
-            importDeclaration.modifiers = modifiers;
-            // ImportDeclaration:
-            //  import ImportClause from ModuleSpecifier ;
-            //  import ModuleSpecifier;
-            if (identifier ||
-                token() === 37 /* AsteriskToken */ ||
-                token() === 15 /* OpenBraceToken */) {
-                importDeclaration.importClause = parseImportClause(identifier, afterImportPos);
-                parseExpected(136 /* FromKeyword */);
-            }
-            importDeclaration.moduleSpecifier = parseModuleSpecifier();
-            parseSemicolon();
-            return finishNode(importDeclaration);
-        }
-        function parseImportClause(identifier, fullStart) {
-            // ImportClause:
-            //  ImportedDefaultBinding
-            //  NameSpaceImport
-            //  NamedImports
-            //  ImportedDefaultBinding, NameSpaceImport
-            //  ImportedDefaultBinding, NamedImports
-            var importClause = createNode(231 /* ImportClause */, fullStart);
-            if (identifier) {
-                // ImportedDefaultBinding:
-                //  ImportedBinding
-                importClause.name = identifier;
-            }
-            // If there was no default import or if there is comma token after default import
-            // parse namespace or named imports
-            if (!importClause.name ||
-                parseOptional(24 /* CommaToken */)) {
-                importClause.namedBindings = token() === 37 /* AsteriskToken */ ? parseNamespaceImport() : parseNamedImportsOrExports(233 /* NamedImports */);
-            }
-            return finishNode(importClause);
+            return _jsxNamespace;
         }
-        function parseModuleReference() {
-            return isExternalModuleReference()
-                ? parseExternalModuleReference()
-                : parseEntityName(/*allowReservedWords*/ false);
-        }
-        function parseExternalModuleReference() {
-            var node = createNode(240 /* ExternalModuleReference */);
-            parseExpected(129 /* RequireKeyword */);
-            parseExpected(17 /* OpenParenToken */);
-            node.expression = parseModuleSpecifier();
-            parseExpected(18 /* CloseParenToken */);
-            return finishNode(node);
-        }
-        function parseModuleSpecifier() {
-            if (token() === 9 /* StringLiteral */) {
-                var result = parseLiteralNode();
-                internIdentifier(result.text);
-                return result;
-            }
-            else {
-                // We allow arbitrary expressions here, even though the grammar only allows string
-                // literals.  We check to ensure that it is only a string literal later in the grammar
-                // check pass.
-                return parseExpression();
-            }
+        function getEmitResolver(sourceFile, cancellationToken) {
+            // Ensure we have all the type information in place for this file so that all the
+            // emitter questions of this resolver will return the right information.
+            getDiagnostics(sourceFile, cancellationToken);
+            return emitResolver;
         }
-        function parseNamespaceImport() {
-            // NameSpaceImport:
-            //  * as ImportedBinding
-            var namespaceImport = createNode(232 /* NamespaceImport */);
-            parseExpected(37 /* AsteriskToken */);
-            parseExpected(116 /* AsKeyword */);
-            namespaceImport.name = parseIdentifier();
-            return finishNode(namespaceImport);
+        function error(location, message, arg0, arg1, arg2) {
+            var diagnostic = location
+                ? ts.createDiagnosticForNode(location, message, arg0, arg1, arg2)
+                : ts.createCompilerDiagnostic(message, arg0, arg1, arg2);
+            diagnostics.add(diagnostic);
         }
-        function parseNamedImportsOrExports(kind) {
-            var node = createNode(kind);
-            // NamedImports:
-            //  { }
-            //  { ImportsList }
-            //  { ImportsList, }
-            // ImportsList:
-            //  ImportSpecifier
-            //  ImportsList, ImportSpecifier
-            node.elements = parseBracketedList(21 /* ImportOrExportSpecifiers */, kind === 233 /* NamedImports */ ? parseImportSpecifier : parseExportSpecifier, 15 /* OpenBraceToken */, 16 /* CloseBraceToken */);
-            return finishNode(node);
+        function createSymbol(flags, name) {
+            symbolCount++;
+            var symbol = (new Symbol(flags | 134217728 /* Transient */, name));
+            symbol.checkFlags = 0;
+            return symbol;
         }
-        function parseExportSpecifier() {
-            return parseImportOrExportSpecifier(238 /* ExportSpecifier */);
+        function isTransientSymbol(symbol) {
+            return (symbol.flags & 134217728 /* Transient */) !== 0;
         }
-        function parseImportSpecifier() {
-            return parseImportOrExportSpecifier(234 /* ImportSpecifier */);
+        function getExcludedSymbolFlags(flags) {
+            var result = 0;
+            if (flags & 2 /* BlockScopedVariable */)
+                result |= 107455 /* BlockScopedVariableExcludes */;
+            if (flags & 1 /* FunctionScopedVariable */)
+                result |= 107454 /* FunctionScopedVariableExcludes */;
+            if (flags & 4 /* Property */)
+                result |= 0 /* PropertyExcludes */;
+            if (flags & 8 /* EnumMember */)
+                result |= 900095 /* EnumMemberExcludes */;
+            if (flags & 16 /* Function */)
+                result |= 106927 /* FunctionExcludes */;
+            if (flags & 32 /* Class */)
+                result |= 899519 /* ClassExcludes */;
+            if (flags & 64 /* Interface */)
+                result |= 792968 /* InterfaceExcludes */;
+            if (flags & 256 /* RegularEnum */)
+                result |= 899327 /* RegularEnumExcludes */;
+            if (flags & 128 /* ConstEnum */)
+                result |= 899967 /* ConstEnumExcludes */;
+            if (flags & 512 /* ValueModule */)
+                result |= 106639 /* ValueModuleExcludes */;
+            if (flags & 8192 /* Method */)
+                result |= 99263 /* MethodExcludes */;
+            if (flags & 32768 /* GetAccessor */)
+                result |= 41919 /* GetAccessorExcludes */;
+            if (flags & 65536 /* SetAccessor */)
+                result |= 74687 /* SetAccessorExcludes */;
+            if (flags & 262144 /* TypeParameter */)
+                result |= 530920 /* TypeParameterExcludes */;
+            if (flags & 524288 /* TypeAlias */)
+                result |= 793064 /* TypeAliasExcludes */;
+            if (flags & 8388608 /* Alias */)
+                result |= 8388608 /* AliasExcludes */;
+            return result;
         }
-        function parseImportOrExportSpecifier(kind) {
-            var node = createNode(kind);
-            // ImportSpecifier:
-            //   BindingIdentifier
-            //   IdentifierName as BindingIdentifier
-            // ExportSpecifier:
-            //   IdentifierName
-            //   IdentifierName as IdentifierName
-            var checkIdentifierIsKeyword = ts.isKeyword(token()) && !isIdentifier();
-            var checkIdentifierStart = scanner.getTokenPos();
-            var checkIdentifierEnd = scanner.getTextPos();
-            var identifierName = parseIdentifierName();
-            if (token() === 116 /* AsKeyword */) {
-                node.propertyName = identifierName;
-                parseExpected(116 /* AsKeyword */);
-                checkIdentifierIsKeyword = ts.isKeyword(token()) && !isIdentifier();
-                checkIdentifierStart = scanner.getTokenPos();
-                checkIdentifierEnd = scanner.getTextPos();
-                node.name = parseIdentifierName();
-            }
-            else {
-                node.name = identifierName;
-            }
-            if (kind === 234 /* ImportSpecifier */ && checkIdentifierIsKeyword) {
-                // Report error identifier expected
-                parseErrorAtPosition(checkIdentifierStart, checkIdentifierEnd - checkIdentifierStart, ts.Diagnostics.Identifier_expected);
+        function recordMergedSymbol(target, source) {
+            if (!source.mergeId) {
+                source.mergeId = nextMergeId;
+                nextMergeId++;
             }
-            return finishNode(node);
+            mergedSymbols[source.mergeId] = target;
         }
-        function parseExportDeclaration(fullStart, decorators, modifiers) {
-            var node = createNode(236 /* ExportDeclaration */, fullStart);
-            node.decorators = decorators;
-            node.modifiers = modifiers;
-            if (parseOptional(37 /* AsteriskToken */)) {
-                parseExpected(136 /* FromKeyword */);
-                node.moduleSpecifier = parseModuleSpecifier();
-            }
-            else {
-                node.exportClause = parseNamedImportsOrExports(237 /* NamedExports */);
-                // It is not uncommon to accidentally omit the 'from' keyword. Additionally, in editing scenarios,
-                // the 'from' keyword can be parsed as a named export when the export clause is unterminated (i.e. `export { from "moduleName";`)
-                // If we don't have a 'from' keyword, see if we have a string literal such that ASI won't take effect.
-                if (token() === 136 /* FromKeyword */ || (token() === 9 /* StringLiteral */ && !scanner.hasPrecedingLineBreak())) {
-                    parseExpected(136 /* FromKeyword */);
-                    node.moduleSpecifier = parseModuleSpecifier();
+        function cloneSymbol(symbol) {
+            var result = createSymbol(symbol.flags, symbol.name);
+            result.declarations = symbol.declarations.slice(0);
+            result.parent = symbol.parent;
+            if (symbol.valueDeclaration)
+                result.valueDeclaration = symbol.valueDeclaration;
+            if (symbol.constEnumOnlyModule)
+                result.constEnumOnlyModule = true;
+            if (symbol.members)
+                result.members = ts.cloneMap(symbol.members);
+            if (symbol.exports)
+                result.exports = ts.cloneMap(symbol.exports);
+            recordMergedSymbol(result, symbol);
+            return result;
+        }
+        function mergeSymbol(target, source) {
+            if (!(target.flags & getExcludedSymbolFlags(source.flags))) {
+                if (source.flags & 512 /* ValueModule */ && target.flags & 512 /* ValueModule */ && target.constEnumOnlyModule && !source.constEnumOnlyModule) {
+                    // reset flag when merging instantiated module into value module that has only const enums
+                    target.constEnumOnlyModule = false;
+                }
+                target.flags |= source.flags;
+                if (source.valueDeclaration &&
+                    (!target.valueDeclaration ||
+                        (target.valueDeclaration.kind === 233 /* ModuleDeclaration */ && source.valueDeclaration.kind !== 233 /* ModuleDeclaration */))) {
+                    // other kinds of value declarations take precedence over modules
+                    target.valueDeclaration = source.valueDeclaration;
+                }
+                ts.addRange(target.declarations, source.declarations);
+                if (source.members) {
+                    if (!target.members)
+                        target.members = ts.createMap();
+                    mergeSymbolTable(target.members, source.members);
+                }
+                if (source.exports) {
+                    if (!target.exports)
+                        target.exports = ts.createMap();
+                    mergeSymbolTable(target.exports, source.exports);
                 }
+                recordMergedSymbol(target, source);
             }
-            parseSemicolon();
-            return finishNode(node);
-        }
-        function parseExportAssignment(fullStart, decorators, modifiers) {
-            var node = createNode(235 /* ExportAssignment */, fullStart);
-            node.decorators = decorators;
-            node.modifiers = modifiers;
-            if (parseOptional(56 /* EqualsToken */)) {
-                node.isExportEquals = true;
+            else if (target.flags & 1024 /* NamespaceModule */) {
+                error(ts.getNameOfDeclaration(source.declarations[0]), ts.Diagnostics.Cannot_augment_module_0_with_value_exports_because_it_resolves_to_a_non_module_entity, symbolToString(target));
             }
             else {
-                parseExpected(77 /* DefaultKeyword */);
+                var message_2 = target.flags & 2 /* BlockScopedVariable */ || source.flags & 2 /* BlockScopedVariable */
+                    ? ts.Diagnostics.Cannot_redeclare_block_scoped_variable_0 : ts.Diagnostics.Duplicate_identifier_0;
+                ts.forEach(source.declarations, function (node) {
+                    error(ts.getNameOfDeclaration(node) || node, message_2, symbolToString(source));
+                });
+                ts.forEach(target.declarations, function (node) {
+                    error(ts.getNameOfDeclaration(node) || node, message_2, symbolToString(source));
+                });
             }
-            node.expression = parseAssignmentExpressionOrHigher();
-            parseSemicolon();
-            return finishNode(node);
         }
-        function processReferenceComments(sourceFile) {
-            var triviaScanner = ts.createScanner(sourceFile.languageVersion, /*skipTrivia*/ false, 0 /* Standard */, sourceText);
-            var referencedFiles = [];
-            var typeReferenceDirectives = [];
-            var amdDependencies = [];
-            var amdModuleName;
-            // Keep scanning all the leading trivia in the file until we get to something that
-            // isn't trivia.  Any single line comment will be analyzed to see if it is a
-            // reference comment.
-            while (true) {
-                var kind = triviaScanner.scan();
-                if (kind !== 2 /* SingleLineCommentTrivia */) {
-                    if (ts.isTrivia(kind)) {
-                        continue;
-                    }
-                    else {
-                        break;
-                    }
-                }
-                var range = { pos: triviaScanner.getTokenPos(), end: triviaScanner.getTextPos(), kind: triviaScanner.getToken() };
-                var comment = sourceText.substring(range.pos, range.end);
-                var referencePathMatchResult = ts.getFileReferenceFromReferencePath(comment, range);
-                if (referencePathMatchResult) {
-                    var fileReference = referencePathMatchResult.fileReference;
-                    sourceFile.hasNoDefaultLib = referencePathMatchResult.isNoDefaultLib;
-                    var diagnosticMessage = referencePathMatchResult.diagnosticMessage;
-                    if (fileReference) {
-                        if (referencePathMatchResult.isTypeReferenceDirective) {
-                            typeReferenceDirectives.push(fileReference);
-                        }
-                        else {
-                            referencedFiles.push(fileReference);
-                        }
-                    }
-                    if (diagnosticMessage) {
-                        parseDiagnostics.push(ts.createFileDiagnostic(sourceFile, range.pos, range.end - range.pos, diagnosticMessage));
-                    }
+        function mergeSymbolTable(target, source) {
+            source.forEach(function (sourceSymbol, id) {
+                var targetSymbol = target.get(id);
+                if (!targetSymbol) {
+                    target.set(id, sourceSymbol);
                 }
                 else {
-                    var amdModuleNameRegEx = /^\/\/\/\s*<amd-module\s+name\s*=\s*('|")(.+?)\1/gim;
-                    var amdModuleNameMatchResult = amdModuleNameRegEx.exec(comment);
-                    if (amdModuleNameMatchResult) {
-                        if (amdModuleName) {
-                            parseDiagnostics.push(ts.createFileDiagnostic(sourceFile, range.pos, range.end - range.pos, ts.Diagnostics.An_AMD_module_cannot_have_multiple_name_assignments));
-                        }
-                        amdModuleName = amdModuleNameMatchResult[2];
-                    }
-                    var amdDependencyRegEx = /^\/\/\/\s*<amd-dependency\s/gim;
-                    var pathRegex = /\spath\s*=\s*('|")(.+?)\1/gim;
-                    var nameRegex = /\sname\s*=\s*('|")(.+?)\1/gim;
-                    var amdDependencyMatchResult = amdDependencyRegEx.exec(comment);
-                    if (amdDependencyMatchResult) {
-                        var pathMatchResult = pathRegex.exec(comment);
-                        var nameMatchResult = nameRegex.exec(comment);
-                        if (pathMatchResult) {
-                            var amdDependency = { path: pathMatchResult[2], name: nameMatchResult ? nameMatchResult[2] : undefined };
-                            amdDependencies.push(amdDependency);
-                        }
+                    if (!(targetSymbol.flags & 134217728 /* Transient */)) {
+                        targetSymbol = cloneSymbol(targetSymbol);
+                        target.set(id, targetSymbol);
                     }
+                    mergeSymbol(targetSymbol, sourceSymbol);
                 }
-            }
-            sourceFile.referencedFiles = referencedFiles;
-            sourceFile.typeReferenceDirectives = typeReferenceDirectives;
-            sourceFile.amdDependencies = amdDependencies;
-            sourceFile.moduleName = amdModuleName;
-        }
-        function setExternalModuleIndicator(sourceFile) {
-            sourceFile.externalModuleIndicator = ts.forEach(sourceFile.statements, function (node) {
-                return ts.hasModifier(node, 1 /* Export */)
-                    || node.kind === 229 /* ImportEqualsDeclaration */ && node.moduleReference.kind === 240 /* ExternalModuleReference */
-                    || node.kind === 230 /* ImportDeclaration */
-                    || node.kind === 235 /* ExportAssignment */
-                    || node.kind === 236 /* ExportDeclaration */
-                    ? node
-                    : undefined;
             });
         }
-        var ParsingContext;
-        (function (ParsingContext) {
-            ParsingContext[ParsingContext["SourceElements"] = 0] = "SourceElements";
-            ParsingContext[ParsingContext["BlockStatements"] = 1] = "BlockStatements";
-            ParsingContext[ParsingContext["SwitchClauses"] = 2] = "SwitchClauses";
-            ParsingContext[ParsingContext["SwitchClauseStatements"] = 3] = "SwitchClauseStatements";
-            ParsingContext[ParsingContext["TypeMembers"] = 4] = "TypeMembers";
-            ParsingContext[ParsingContext["ClassMembers"] = 5] = "ClassMembers";
-            ParsingContext[ParsingContext["EnumMembers"] = 6] = "EnumMembers";
-            ParsingContext[ParsingContext["HeritageClauseElement"] = 7] = "HeritageClauseElement";
-            ParsingContext[ParsingContext["VariableDeclarations"] = 8] = "VariableDeclarations";
-            ParsingContext[ParsingContext["ObjectBindingElements"] = 9] = "ObjectBindingElements";
-            ParsingContext[ParsingContext["ArrayBindingElements"] = 10] = "ArrayBindingElements";
-            ParsingContext[ParsingContext["ArgumentExpressions"] = 11] = "ArgumentExpressions";
-            ParsingContext[ParsingContext["ObjectLiteralMembers"] = 12] = "ObjectLiteralMembers";
-            ParsingContext[ParsingContext["JsxAttributes"] = 13] = "JsxAttributes";
-            ParsingContext[ParsingContext["JsxChildren"] = 14] = "JsxChildren";
-            ParsingContext[ParsingContext["ArrayLiteralMembers"] = 15] = "ArrayLiteralMembers";
-            ParsingContext[ParsingContext["Parameters"] = 16] = "Parameters";
-            ParsingContext[ParsingContext["TypeParameters"] = 17] = "TypeParameters";
-            ParsingContext[ParsingContext["TypeArguments"] = 18] = "TypeArguments";
-            ParsingContext[ParsingContext["TupleElementTypes"] = 19] = "TupleElementTypes";
-            ParsingContext[ParsingContext["HeritageClauses"] = 20] = "HeritageClauses";
-            ParsingContext[ParsingContext["ImportOrExportSpecifiers"] = 21] = "ImportOrExportSpecifiers";
-            ParsingContext[ParsingContext["JSDocFunctionParameters"] = 22] = "JSDocFunctionParameters";
-            ParsingContext[ParsingContext["JSDocTypeArguments"] = 23] = "JSDocTypeArguments";
-            ParsingContext[ParsingContext["JSDocRecordMembers"] = 24] = "JSDocRecordMembers";
-            ParsingContext[ParsingContext["JSDocTupleTypes"] = 25] = "JSDocTupleTypes";
-            ParsingContext[ParsingContext["Count"] = 26] = "Count"; // Number of parsing contexts
-        })(ParsingContext || (ParsingContext = {}));
-        var Tristate;
-        (function (Tristate) {
-            Tristate[Tristate["False"] = 0] = "False";
-            Tristate[Tristate["True"] = 1] = "True";
-            Tristate[Tristate["Unknown"] = 2] = "Unknown";
-        })(Tristate || (Tristate = {}));
-        var JSDocParser;
-        (function (JSDocParser) {
-            function isJSDocType() {
-                switch (token()) {
-                    case 37 /* AsteriskToken */:
-                    case 53 /* QuestionToken */:
-                    case 17 /* OpenParenToken */:
-                    case 19 /* OpenBracketToken */:
-                    case 49 /* ExclamationToken */:
-                    case 15 /* OpenBraceToken */:
-                    case 87 /* FunctionKeyword */:
-                    case 22 /* DotDotDotToken */:
-                    case 92 /* NewKeyword */:
-                    case 97 /* ThisKeyword */:
-                        return true;
-                }
-                return ts.tokenIsIdentifierOrKeyword(token());
-            }
-            JSDocParser.isJSDocType = isJSDocType;
-            function parseJSDocTypeExpressionForTests(content, start, length) {
-                initializeState("file.js", content, 2 /* Latest */, /*_syntaxCursor:*/ undefined, 1 /* JS */);
-                sourceFile = createSourceFile("file.js", 2 /* Latest */, 1 /* JS */);
-                scanner.setText(content, start, length);
-                currentToken = scanner.scan();
-                var jsDocTypeExpression = parseJSDocTypeExpression();
-                var diagnostics = parseDiagnostics;
-                clearState();
-                return jsDocTypeExpression ? { jsDocTypeExpression: jsDocTypeExpression, diagnostics: diagnostics } : undefined;
-            }
-            JSDocParser.parseJSDocTypeExpressionForTests = parseJSDocTypeExpressionForTests;
-            // Parses out a JSDoc type expression.
-            /* @internal */
-            function parseJSDocTypeExpression() {
-                var result = createNode(257 /* JSDocTypeExpression */, scanner.getTokenPos());
-                parseExpected(15 /* OpenBraceToken */);
-                result.type = parseJSDocTopLevelType();
-                parseExpected(16 /* CloseBraceToken */);
-                fixupParentReferences(result);
-                return finishNode(result);
-            }
-            JSDocParser.parseJSDocTypeExpression = parseJSDocTypeExpression;
-            function parseJSDocTopLevelType() {
-                var type = parseJSDocType();
-                if (token() === 47 /* BarToken */) {
-                    var unionType = createNode(261 /* JSDocUnionType */, type.pos);
-                    unionType.types = parseJSDocTypeList(type);
-                    type = finishNode(unionType);
-                }
-                if (token() === 56 /* EqualsToken */) {
-                    var optionalType = createNode(268 /* JSDocOptionalType */, type.pos);
-                    nextToken();
-                    optionalType.type = type;
-                    type = finishNode(optionalType);
-                }
-                return type;
+        function mergeModuleAugmentation(moduleName) {
+            var moduleAugmentation = moduleName.parent;
+            if (moduleAugmentation.symbol.declarations[0] !== moduleAugmentation) {
+                // this is a combined symbol for multiple augmentations within the same file.
+                // its symbol already has accumulated information for all declarations
+                // so we need to add it just once - do the work only for first declaration
+                ts.Debug.assert(moduleAugmentation.symbol.declarations.length > 1);
+                return;
             }
-            function parseJSDocType() {
-                var type = parseBasicTypeExpression();
-                while (true) {
-                    if (token() === 19 /* OpenBracketToken */) {
-                        var arrayType = createNode(260 /* JSDocArrayType */, type.pos);
-                        arrayType.elementType = type;
-                        nextToken();
-                        parseExpected(20 /* CloseBracketToken */);
-                        type = finishNode(arrayType);
-                    }
-                    else if (token() === 53 /* QuestionToken */) {
-                        var nullableType = createNode(263 /* JSDocNullableType */, type.pos);
-                        nullableType.type = type;
-                        nextToken();
-                        type = finishNode(nullableType);
-                    }
-                    else if (token() === 49 /* ExclamationToken */) {
-                        var nonNullableType = createNode(264 /* JSDocNonNullableType */, type.pos);
-                        nonNullableType.type = type;
-                        nextToken();
-                        type = finishNode(nonNullableType);
-                    }
-                    else {
-                        break;
-                    }
-                }
-                return type;
+            if (ts.isGlobalScopeAugmentation(moduleAugmentation)) {
+                mergeSymbolTable(globals, moduleAugmentation.symbol.exports);
             }
-            function parseBasicTypeExpression() {
-                switch (token()) {
-                    case 37 /* AsteriskToken */:
-                        return parseJSDocAllType();
-                    case 53 /* QuestionToken */:
-                        return parseJSDocUnknownOrNullableType();
-                    case 17 /* OpenParenToken */:
-                        return parseJSDocUnionType();
-                    case 19 /* OpenBracketToken */:
-                        return parseJSDocTupleType();
-                    case 49 /* ExclamationToken */:
-                        return parseJSDocNonNullableType();
-                    case 15 /* OpenBraceToken */:
-                        return parseJSDocRecordType();
-                    case 87 /* FunctionKeyword */:
-                        return parseJSDocFunctionType();
-                    case 22 /* DotDotDotToken */:
-                        return parseJSDocVariadicType();
-                    case 92 /* NewKeyword */:
-                        return parseJSDocConstructorType();
-                    case 97 /* ThisKeyword */:
-                        return parseJSDocThisType();
-                    case 117 /* AnyKeyword */:
-                    case 132 /* StringKeyword */:
-                    case 130 /* NumberKeyword */:
-                    case 120 /* BooleanKeyword */:
-                    case 133 /* SymbolKeyword */:
-                    case 103 /* VoidKeyword */:
-                    case 93 /* NullKeyword */:
-                    case 135 /* UndefinedKeyword */:
-                    case 127 /* NeverKeyword */:
-                        return parseTokenNode();
-                    case 9 /* StringLiteral */:
-                    case 8 /* NumericLiteral */:
-                    case 99 /* TrueKeyword */:
-                    case 84 /* FalseKeyword */:
-                        return parseJSDocLiteralType();
+            else {
+                // find a module that about to be augmented
+                // do not validate names of augmentations that are defined in ambient context
+                var moduleNotFoundError = !ts.isInAmbientContext(moduleName.parent.parent)
+                    ? ts.Diagnostics.Invalid_module_name_in_augmentation_module_0_cannot_be_found
+                    : undefined;
+                var mainModule = resolveExternalModuleNameWorker(moduleName, moduleName, moduleNotFoundError, /*isForAugmentation*/ true);
+                if (!mainModule) {
+                    return;
                 }
-                return parseJSDocTypeReference();
-            }
-            function parseJSDocThisType() {
-                var result = createNode(272 /* JSDocThisType */);
-                nextToken();
-                parseExpected(54 /* ColonToken */);
-                result.type = parseJSDocType();
-                return finishNode(result);
-            }
-            function parseJSDocConstructorType() {
-                var result = createNode(271 /* JSDocConstructorType */);
-                nextToken();
-                parseExpected(54 /* ColonToken */);
-                result.type = parseJSDocType();
-                return finishNode(result);
-            }
-            function parseJSDocVariadicType() {
-                var result = createNode(270 /* JSDocVariadicType */);
-                nextToken();
-                result.type = parseJSDocType();
-                return finishNode(result);
-            }
-            function parseJSDocFunctionType() {
-                var result = createNode(269 /* JSDocFunctionType */);
-                nextToken();
-                parseExpected(17 /* OpenParenToken */);
-                result.parameters = parseDelimitedList(22 /* JSDocFunctionParameters */, parseJSDocParameter);
-                checkForTrailingComma(result.parameters);
-                parseExpected(18 /* CloseParenToken */);
-                if (token() === 54 /* ColonToken */) {
-                    nextToken();
-                    result.type = parseJSDocType();
+                // obtain item referenced by 'export='
+                mainModule = resolveExternalModuleSymbol(mainModule);
+                if (mainModule.flags & 1920 /* Namespace */) {
+                    // if module symbol has already been merged - it is safe to use it.
+                    // otherwise clone it
+                    mainModule = mainModule.flags & 134217728 /* Transient */ ? mainModule : cloneSymbol(mainModule);
+                    mergeSymbol(mainModule, moduleAugmentation.symbol);
                 }
-                return finishNode(result);
-            }
-            function parseJSDocParameter() {
-                var parameter = createNode(142 /* Parameter */);
-                parameter.type = parseJSDocType();
-                if (parseOptional(56 /* EqualsToken */)) {
-                    parameter.questionToken = createNode(56 /* EqualsToken */);
+                else {
+                    error(moduleName, ts.Diagnostics.Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity, moduleName.text);
                 }
-                return finishNode(parameter);
             }
-            function parseJSDocTypeReference() {
-                var result = createNode(267 /* JSDocTypeReference */);
-                result.name = parseSimplePropertyName();
-                if (token() === 25 /* LessThanToken */) {
-                    result.typeArguments = parseTypeArguments();
+        }
+        function addToSymbolTable(target, source, message) {
+            source.forEach(function (sourceSymbol, id) {
+                var targetSymbol = target.get(id);
+                if (targetSymbol) {
+                    // Error on redeclarations
+                    ts.forEach(targetSymbol.declarations, addDeclarationDiagnostic(id, message));
                 }
                 else {
-                    while (parseOptional(21 /* DotToken */)) {
-                        if (token() === 25 /* LessThanToken */) {
-                            result.typeArguments = parseTypeArguments();
-                            break;
-                        }
-                        else {
-                            result.name = parseQualifiedName(result.name);
-                        }
-                    }
+                    target.set(id, sourceSymbol);
                 }
-                return finishNode(result);
-            }
-            function parseTypeArguments() {
-                // Move past the <
-                nextToken();
-                var typeArguments = parseDelimitedList(23 /* JSDocTypeArguments */, parseJSDocType);
-                checkForTrailingComma(typeArguments);
-                checkForEmptyTypeArgumentList(typeArguments);
-                parseExpected(27 /* GreaterThanToken */);
-                return typeArguments;
+            });
+            function addDeclarationDiagnostic(id, message) {
+                return function (declaration) { return diagnostics.add(ts.createDiagnosticForNode(declaration, message, id)); };
             }
-            function checkForEmptyTypeArgumentList(typeArguments) {
-                if (parseDiagnostics.length === 0 && typeArguments && typeArguments.length === 0) {
-                    var start = typeArguments.pos - "<".length;
-                    var end = ts.skipTrivia(sourceText, typeArguments.end) + ">".length;
-                    return parseErrorAtPosition(start, end - start, ts.Diagnostics.Type_argument_list_cannot_be_empty);
+        }
+        function getSymbolLinks(symbol) {
+            if (symbol.flags & 134217728 /* Transient */)
+                return symbol;
+            var id = getSymbolId(symbol);
+            return symbolLinks[id] || (symbolLinks[id] = {});
+        }
+        function getNodeLinks(node) {
+            var nodeId = getNodeId(node);
+            return nodeLinks[nodeId] || (nodeLinks[nodeId] = { flags: 0 });
+        }
+        function getObjectFlags(type) {
+            return type.flags & 32768 /* Object */ ? type.objectFlags : 0;
+        }
+        function isGlobalSourceFile(node) {
+            return node.kind === 265 /* SourceFile */ && !ts.isExternalOrCommonJsModule(node);
+        }
+        function getSymbol(symbols, name, meaning) {
+            if (meaning) {
+                var symbol = symbols.get(name);
+                if (symbol) {
+                    ts.Debug.assert((ts.getCheckFlags(symbol) & 1 /* Instantiated */) === 0, "Should never get an instantiated symbol here.");
+                    if (symbol.flags & meaning) {
+                        return symbol;
+                    }
+                    if (symbol.flags & 8388608 /* Alias */) {
+                        var target = resolveAlias(symbol);
+                        // Unknown symbol means an error occurred in alias resolution, treat it as positive answer to avoid cascading errors
+                        if (target === unknownSymbol || target.flags & meaning) {
+                            return symbol;
+                        }
+                    }
                 }
             }
-            function parseQualifiedName(left) {
-                var result = createNode(139 /* QualifiedName */, left.pos);
-                result.left = left;
-                result.right = parseIdentifierName();
-                return finishNode(result);
-            }
-            function parseJSDocRecordType() {
-                var result = createNode(265 /* JSDocRecordType */);
-                result.literal = parseTypeLiteral();
-                return finishNode(result);
-            }
-            function parseJSDocNonNullableType() {
-                var result = createNode(264 /* JSDocNonNullableType */);
-                nextToken();
-                result.type = parseJSDocType();
-                return finishNode(result);
-            }
-            function parseJSDocTupleType() {
-                var result = createNode(262 /* JSDocTupleType */);
-                nextToken();
-                result.types = parseDelimitedList(25 /* JSDocTupleTypes */, parseJSDocType);
-                checkForTrailingComma(result.types);
-                parseExpected(20 /* CloseBracketToken */);
-                return finishNode(result);
+            // return undefined if we can't find a symbol.
+        }
+        /**
+         * Get symbols that represent parameter-property-declaration as parameter and as property declaration
+         * @param parameter a parameterDeclaration node
+         * @param parameterName a name of the parameter to get the symbols for.
+         * @return a tuple of two symbols
+         */
+        function getSymbolsOfParameterPropertyDeclaration(parameter, parameterName) {
+            var constructorDeclaration = parameter.parent;
+            var classDeclaration = parameter.parent.parent;
+            var parameterSymbol = getSymbol(constructorDeclaration.locals, parameterName, 107455 /* Value */);
+            var propertySymbol = getSymbol(classDeclaration.symbol.members, parameterName, 107455 /* Value */);
+            if (parameterSymbol && propertySymbol) {
+                return [parameterSymbol, propertySymbol];
             }
-            function checkForTrailingComma(list) {
-                if (parseDiagnostics.length === 0 && list.hasTrailingComma) {
-                    var start = list.end - ",".length;
-                    parseErrorAtPosition(start, ",".length, ts.Diagnostics.Trailing_comma_not_allowed);
+            ts.Debug.fail("There should exist two symbols, one as property declaration and one as parameter declaration");
+        }
+        function isBlockScopedNameDeclaredBeforeUse(declaration, usage) {
+            var declarationFile = ts.getSourceFileOfNode(declaration);
+            var useFile = ts.getSourceFileOfNode(usage);
+            if (declarationFile !== useFile) {
+                if ((modulekind && (declarationFile.externalModuleIndicator || useFile.externalModuleIndicator)) ||
+                    (!compilerOptions.outFile && !compilerOptions.out) ||
+                    isInTypeQuery(usage) ||
+                    ts.isInAmbientContext(declaration)) {
+                    // nodes are in different files and order cannot be determined
+                    return true;
                 }
-            }
-            function parseJSDocUnionType() {
-                var result = createNode(261 /* JSDocUnionType */);
-                nextToken();
-                result.types = parseJSDocTypeList(parseJSDocType());
-                parseExpected(18 /* CloseParenToken */);
-                return finishNode(result);
-            }
-            function parseJSDocTypeList(firstType) {
-                ts.Debug.assert(!!firstType);
-                var types = createNodeArray([firstType], firstType.pos);
-                while (parseOptional(47 /* BarToken */)) {
-                    types.push(parseJSDocType());
+                // declaration is after usage
+                // can be legal if usage is deferred (i.e. inside function or in initializer of instance property)
+                if (isUsedInFunctionOrInstanceProperty(usage, declaration)) {
+                    return true;
                 }
-                types.end = scanner.getStartPos();
-                return types;
-            }
-            function parseJSDocAllType() {
-                var result = createNode(258 /* JSDocAllType */);
-                nextToken();
-                return finishNode(result);
-            }
-            function parseJSDocLiteralType() {
-                var result = createNode(282 /* JSDocLiteralType */);
-                result.literal = parseLiteralTypeNode();
-                return finishNode(result);
+                var sourceFiles = host.getSourceFiles();
+                return ts.indexOf(sourceFiles, declarationFile) <= ts.indexOf(sourceFiles, useFile);
             }
-            function parseJSDocUnknownOrNullableType() {
-                var pos = scanner.getStartPos();
-                // skip the ?
-                nextToken();
-                // Need to lookahead to decide if this is a nullable or unknown type.
-                // Here are cases where we'll pick the unknown type:
-                //
-                //      Foo(?,
-                //      { a: ? }
-                //      Foo(?)
-                //      Foo<?>
-                //      Foo(?=
-                //      (?|
-                if (token() === 24 /* CommaToken */ ||
-                    token() === 16 /* CloseBraceToken */ ||
-                    token() === 18 /* CloseParenToken */ ||
-                    token() === 27 /* GreaterThanToken */ ||
-                    token() === 56 /* EqualsToken */ ||
-                    token() === 47 /* BarToken */) {
-                    var result = createNode(259 /* JSDocUnknownType */, pos);
-                    return finishNode(result);
+            if (declaration.pos <= usage.pos) {
+                // declaration is before usage
+                if (declaration.kind === 176 /* BindingElement */) {
+                    // still might be illegal if declaration and usage are both binding elements (eg var [a = b, b = b] = [1, 2])
+                    var errorBindingElement = ts.getAncestor(usage, 176 /* BindingElement */);
+                    if (errorBindingElement) {
+                        return ts.findAncestor(errorBindingElement, ts.isBindingElement) !== ts.findAncestor(declaration, ts.isBindingElement) ||
+                            declaration.pos < errorBindingElement.pos;
+                    }
+                    // or it might be illegal if usage happens before parent variable is declared (eg var [a] = a)
+                    return isBlockScopedNameDeclaredBeforeUse(ts.getAncestor(declaration, 226 /* VariableDeclaration */), usage);
                 }
-                else {
-                    var result = createNode(263 /* JSDocNullableType */, pos);
-                    result.type = parseJSDocType();
-                    return finishNode(result);
+                else if (declaration.kind === 226 /* VariableDeclaration */) {
+                    // still might be illegal if usage is in the initializer of the variable declaration (eg var a = a)
+                    return !isImmediatelyUsedInInitializerOfBlockScopedVariable(declaration, usage);
                 }
+                return true;
             }
-            function parseIsolatedJSDocComment(content, start, length) {
-                initializeState("file.js", content, 2 /* Latest */, /*_syntaxCursor:*/ undefined, 1 /* JS */);
-                sourceFile = { languageVariant: 0 /* Standard */, text: content };
-                var jsDoc = parseJSDocCommentWorker(start, length);
-                var diagnostics = parseDiagnostics;
-                clearState();
-                return jsDoc ? { jsDoc: jsDoc, diagnostics: diagnostics } : undefined;
+            // declaration is after usage, but it can still be legal if usage is deferred:
+            // 1. inside an export specifier
+            // 2. inside a function
+            // 3. inside an instance property initializer, a reference to a non-instance property
+            // 4. inside a static property initializer, a reference to a static method in the same class
+            // or if usage is in a type context:
+            // 1. inside a type query (typeof in type position)
+            if (usage.parent.kind === 246 /* ExportSpecifier */) {
+                // export specifiers do not use the variable, they only make it available for use
+                return true;
             }
-            JSDocParser.parseIsolatedJSDocComment = parseIsolatedJSDocComment;
-            function parseJSDocComment(parent, start, length) {
-                var saveToken = currentToken;
-                var saveParseDiagnosticsLength = parseDiagnostics.length;
-                var saveParseErrorBeforeNextFinishedNode = parseErrorBeforeNextFinishedNode;
-                var comment = parseJSDocCommentWorker(start, length);
-                if (comment) {
-                    comment.parent = parent;
+            var container = ts.getEnclosingBlockScopeContainer(declaration);
+            return isInTypeQuery(usage) || isUsedInFunctionOrInstanceProperty(usage, declaration, container);
+            function isImmediatelyUsedInInitializerOfBlockScopedVariable(declaration, usage) {
+                var container = ts.getEnclosingBlockScopeContainer(declaration);
+                switch (declaration.parent.parent.kind) {
+                    case 208 /* VariableStatement */:
+                    case 214 /* ForStatement */:
+                    case 216 /* ForOfStatement */:
+                        // variable statement/for/for-of statement case,
+                        // use site should not be inside variable declaration (initializer of declaration or binding element)
+                        if (isSameScopeDescendentOf(usage, declaration, container)) {
+                            return true;
+                        }
+                        break;
                 }
-                currentToken = saveToken;
-                parseDiagnostics.length = saveParseDiagnosticsLength;
-                parseErrorBeforeNextFinishedNode = saveParseErrorBeforeNextFinishedNode;
-                return comment;
+                // ForIn/ForOf case - use site should not be used in expression part
+                return ts.isForInOrOfStatement(declaration.parent.parent) && isSameScopeDescendentOf(usage, declaration.parent.parent.expression, container);
             }
-            JSDocParser.parseJSDocComment = parseJSDocComment;
-            var JSDocState;
-            (function (JSDocState) {
-                JSDocState[JSDocState["BeginningOfLine"] = 0] = "BeginningOfLine";
-                JSDocState[JSDocState["SawAsterisk"] = 1] = "SawAsterisk";
-                JSDocState[JSDocState["SavingComments"] = 2] = "SavingComments";
-            })(JSDocState || (JSDocState = {}));
-            function parseJSDocCommentWorker(start, length) {
-                var content = sourceText;
-                start = start || 0;
-                var end = length === undefined ? content.length : start + length;
-                length = end - start;
-                ts.Debug.assert(start >= 0);
-                ts.Debug.assert(start <= end);
-                ts.Debug.assert(end <= content.length);
-                var tags;
-                var comments = [];
-                var result;
-                // Check for /** (JSDoc opening part)
-                if (!isJsDocStart(content, start)) {
-                    return result;
-                }
-                // + 3 for leading /**, - 5 in total for /** */
-                scanner.scanRange(start + 3, length - 5, function () {
-                    // Initially we can parse out a tag.  We also have seen a starting asterisk.
-                    // This is so that /** * @type */ doesn't parse.
-                    var advanceToken = true;
-                    var state = 1 /* SawAsterisk */;
-                    var margin = undefined;
-                    // + 4 for leading '/** '
-                    var indent = start - Math.max(content.lastIndexOf("\n", start), 0) + 4;
-                    function pushComment(text) {
-                        if (!margin) {
-                            margin = indent;
-                        }
-                        comments.push(text);
-                        indent += text.length;
-                    }
-                    nextJSDocToken();
-                    while (token() === 5 /* WhitespaceTrivia */) {
-                        nextJSDocToken();
+            function isUsedInFunctionOrInstanceProperty(usage, declaration, container) {
+                return !!ts.findAncestor(usage, function (current) {
+                    if (current === container) {
+                        return "quit";
                     }
-                    if (token() === 4 /* NewLineTrivia */) {
-                        state = 0 /* BeginningOfLine */;
-                        nextJSDocToken();
+                    if (ts.isFunctionLike(current)) {
+                        return true;
                     }
-                    while (token() !== 1 /* EndOfFileToken */) {
-                        switch (token()) {
-                            case 55 /* AtToken */:
-                                if (state === 0 /* BeginningOfLine */ || state === 1 /* SawAsterisk */) {
-                                    removeTrailingNewlines(comments);
-                                    parseTag(indent);
-                                    // NOTE: According to usejsdoc.org, a tag goes to end of line, except the last tag.
-                                    // Real-world comments may break this rule, so "BeginningOfLine" will not be a real line beginning
-                                    // for malformed examples like `/** @param {string} x @returns {number} the length */`
-                                    state = 0 /* BeginningOfLine */;
-                                    advanceToken = false;
-                                    margin = undefined;
-                                    indent++;
-                                }
-                                else {
-                                    pushComment(scanner.getTokenText());
-                                }
-                                break;
-                            case 4 /* NewLineTrivia */:
-                                comments.push(scanner.getTokenText());
-                                state = 0 /* BeginningOfLine */;
-                                indent = 0;
-                                break;
-                            case 37 /* AsteriskToken */:
-                                var asterisk = scanner.getTokenText();
-                                if (state === 1 /* SawAsterisk */) {
-                                    // If we've already seen an asterisk, then we can no longer parse a tag on this line
-                                    state = 2 /* SavingComments */;
-                                    pushComment(asterisk);
-                                }
-                                else {
-                                    // Ignore the first asterisk on a line
-                                    state = 1 /* SawAsterisk */;
-                                    indent += asterisk.length;
-                                }
-                                break;
-                            case 69 /* Identifier */:
-                                // Anything else is doc comment text. We just save it. Because it
-                                // wasn't a tag, we can no longer parse a tag on this line until we hit the next
-                                // line break.
-                                pushComment(scanner.getTokenText());
-                                state = 2 /* SavingComments */;
-                                break;
-                            case 5 /* WhitespaceTrivia */:
-                                // only collect whitespace if we're already saving comments or have just crossed the comment indent margin
-                                var whitespace = scanner.getTokenText();
-                                if (state === 2 /* SavingComments */ || margin !== undefined && indent + whitespace.length > margin) {
-                                    comments.push(whitespace.slice(margin - indent - 1));
-                                }
-                                indent += whitespace.length;
-                                break;
-                            case 1 /* EndOfFileToken */:
-                                break;
-                            default:
-                                pushComment(scanner.getTokenText());
-                                break;
-                        }
-                        if (advanceToken) {
-                            nextJSDocToken();
+                    var initializerOfProperty = current.parent &&
+                        current.parent.kind === 149 /* PropertyDeclaration */ &&
+                        current.parent.initializer === current;
+                    if (initializerOfProperty) {
+                        if (ts.getModifierFlags(current.parent) & 32 /* Static */) {
+                            if (declaration.kind === 151 /* MethodDeclaration */) {
+                                return true;
+                            }
                         }
                         else {
-                            advanceToken = true;
+                            var isDeclarationInstanceProperty = declaration.kind === 149 /* PropertyDeclaration */ && !(ts.getModifierFlags(declaration) & 32 /* Static */);
+                            if (!isDeclarationInstanceProperty || ts.getContainingClass(usage) !== ts.getContainingClass(declaration)) {
+                                return true;
+                            }
                         }
                     }
-                    removeLeadingNewlines(comments);
-                    removeTrailingNewlines(comments);
-                    result = createJSDocComment();
                 });
-                return result;
-                function removeLeadingNewlines(comments) {
-                    while (comments.length && (comments[0] === "\n" || comments[0] === "\r")) {
-                        comments.shift();
-                    }
-                }
-                function removeTrailingNewlines(comments) {
-                    while (comments.length && (comments[comments.length - 1] === "\n" || comments[comments.length - 1] === "\r")) {
-                        comments.pop();
-                    }
-                }
-                function isJsDocStart(content, start) {
-                    return content.charCodeAt(start) === 47 /* slash */ &&
-                        content.charCodeAt(start + 1) === 42 /* asterisk */ &&
-                        content.charCodeAt(start + 2) === 42 /* asterisk */ &&
-                        content.charCodeAt(start + 3) !== 42 /* asterisk */;
-                }
-                function createJSDocComment() {
-                    var result = createNode(273 /* JSDocComment */, start);
-                    result.tags = tags;
-                    result.comment = comments.length ? comments.join("") : undefined;
-                    return finishNode(result, end);
-                }
-                function skipWhitespace() {
-                    while (token() === 5 /* WhitespaceTrivia */ || token() === 4 /* NewLineTrivia */) {
-                        nextJSDocToken();
+            }
+        }
+        // Resolve a given name for a given meaning at a given location. An error is reported if the name was not found and
+        // the nameNotFoundMessage argument is not undefined. Returns the resolved symbol, or undefined if no symbol with
+        // the given name can be found.
+        function resolveName(location, name, meaning, nameNotFoundMessage, nameArg, suggestedNameNotFoundMessage) {
+            return resolveNameHelper(location, name, meaning, nameNotFoundMessage, nameArg, getSymbol, suggestedNameNotFoundMessage);
+        }
+        function resolveNameHelper(location, name, meaning, nameNotFoundMessage, nameArg, lookup, suggestedNameNotFoundMessage) {
+            var originalLocation = location; // needed for did-you-mean error reporting, which gathers candidates starting from the original location
+            var result;
+            var lastLocation;
+            var propertyWithInvalidInitializer;
+            var errorLocation = location;
+            var grandparent;
+            var isInExternalModule = false;
+            loop: while (location) {
+                // Locals of a source file are not in scope (because they get merged into the global symbol table)
+                if (location.locals && !isGlobalSourceFile(location)) {
+                    if (result = lookup(location.locals, name, meaning)) {
+                        var useResult = true;
+                        if (ts.isFunctionLike(location) && lastLocation && lastLocation !== location.body) {
+                            // symbol lookup restrictions for function-like declarations
+                            // - Type parameters of a function are in scope in the entire function declaration, including the parameter
+                            //   list and return type. However, local types are only in scope in the function body.
+                            // - parameters are only in the scope of function body
+                            // This restriction does not apply to JSDoc comment types because they are parented
+                            // at a higher level than type parameters would normally be
+                            if (meaning & result.flags & 793064 /* Type */ && lastLocation.kind !== 283 /* JSDocComment */) {
+                                useResult = result.flags & 262144 /* TypeParameter */
+                                    ? lastLocation === location.type ||
+                                        lastLocation.kind === 146 /* Parameter */ ||
+                                        lastLocation.kind === 145 /* TypeParameter */
+                                    : false;
+                            }
+                            if (meaning & 107455 /* Value */ && result.flags & 1 /* FunctionScopedVariable */) {
+                                // parameters are visible only inside function body, parameter list and return type
+                                // technically for parameter list case here we might mix parameters and variables declared in function,
+                                // however it is detected separately when checking initializers of parameters
+                                // to make sure that they reference no variables declared after them.
+                                useResult =
+                                    lastLocation.kind === 146 /* Parameter */ ||
+                                        (lastLocation === location.type &&
+                                            result.valueDeclaration.kind === 146 /* Parameter */);
+                            }
+                        }
+                        if (useResult) {
+                            break loop;
+                        }
+                        else {
+                            result = undefined;
+                        }
                     }
                 }
-                function parseTag(indent) {
-                    ts.Debug.assert(token() === 55 /* AtToken */);
-                    var atToken = createNode(55 /* AtToken */, scanner.getTokenPos());
-                    atToken.end = scanner.getTextPos();
-                    nextJSDocToken();
-                    var tagName = parseJSDocIdentifierName();
-                    skipWhitespace();
-                    if (!tagName) {
-                        return;
-                    }
-                    var tag;
-                    if (tagName) {
-                        switch (tagName.text) {
-                            case "param":
-                                tag = parseParamTag(atToken, tagName);
-                                break;
-                            case "return":
-                            case "returns":
-                                tag = parseReturnTag(atToken, tagName);
-                                break;
-                            case "template":
-                                tag = parseTemplateTag(atToken, tagName);
-                                break;
-                            case "type":
-                                tag = parseTypeTag(atToken, tagName);
-                                break;
-                            case "typedef":
-                                tag = parseTypedefTag(atToken, tagName);
+                switch (location.kind) {
+                    case 265 /* SourceFile */:
+                        if (!ts.isExternalOrCommonJsModule(location))
+                            break;
+                        isInExternalModule = true;
+                    // falls through
+                    case 233 /* ModuleDeclaration */:
+                        var moduleExports = getSymbolOfNode(location).exports;
+                        if (location.kind === 265 /* SourceFile */ || ts.isAmbientModule(location)) {
+                            // It's an external module. First see if the module has an export default and if the local
+                            // name of that export default matches.
+                            if (result = moduleExports.get("default")) {
+                                var localSymbol = ts.getLocalSymbolForExportDefault(result);
+                                if (localSymbol && (result.flags & meaning) && localSymbol.name === name) {
+                                    break loop;
+                                }
+                                result = undefined;
+                            }
+                            // Because of module/namespace merging, a module's exports are in scope,
+                            // yet we never want to treat an export specifier as putting a member in scope.
+                            // Therefore, if the name we find is purely an export specifier, it is not actually considered in scope.
+                            // Two things to note about this:
+                            //     1. We have to check this without calling getSymbol. The problem with calling getSymbol
+                            //        on an export specifier is that it might find the export specifier itself, and try to
+                            //        resolve it as an alias. This will cause the checker to consider the export specifier
+                            //        a circular alias reference when it might not be.
+                            //     2. We check === SymbolFlags.Alias in order to check that the symbol is *purely*
+                            //        an alias. If we used &, we'd be throwing out symbols that have non alias aspects,
+                            //        which is not the desired behavior.
+                            var moduleExport = moduleExports.get(name);
+                            if (moduleExport &&
+                                moduleExport.flags === 8388608 /* Alias */ &&
+                                ts.getDeclarationOfKind(moduleExport, 246 /* ExportSpecifier */)) {
                                 break;
-                            default:
-                                tag = parseUnknownTag(atToken, tagName);
+                            }
+                        }
+                        if (result = lookup(moduleExports, name, meaning & 8914931 /* ModuleMember */)) {
+                            break loop;
+                        }
+                        break;
+                    case 232 /* EnumDeclaration */:
+                        if (result = lookup(getSymbolOfNode(location).exports, name, meaning & 8 /* EnumMember */)) {
+                            break loop;
+                        }
+                        break;
+                    case 149 /* PropertyDeclaration */:
+                    case 148 /* PropertySignature */:
+                        // TypeScript 1.0 spec (April 2014): 8.4.1
+                        // Initializer expressions for instance member variables are evaluated in the scope
+                        // of the class constructor body but are not permitted to reference parameters or
+                        // local variables of the constructor. This effectively means that entities from outer scopes
+                        // by the same name as a constructor parameter or local variable are inaccessible
+                        // in initializer expressions for instance member variables.
+                        if (ts.isClassLike(location.parent) && !(ts.getModifierFlags(location) & 32 /* Static */)) {
+                            var ctor = findConstructorDeclaration(location.parent);
+                            if (ctor && ctor.locals) {
+                                if (lookup(ctor.locals, name, meaning & 107455 /* Value */)) {
+                                    // Remember the property node, it will be used later to report appropriate error
+                                    propertyWithInvalidInitializer = location;
+                                }
+                            }
+                        }
+                        break;
+                    case 229 /* ClassDeclaration */:
+                    case 199 /* ClassExpression */:
+                    case 230 /* InterfaceDeclaration */:
+                        if (result = lookup(getSymbolOfNode(location).members, name, meaning & 793064 /* Type */)) {
+                            if (!isTypeParameterSymbolDeclaredInContainer(result, location)) {
+                                // ignore type parameters not declared in this container
+                                result = undefined;
                                 break;
+                            }
+                            if (lastLocation && ts.getModifierFlags(lastLocation) & 32 /* Static */) {
+                                // TypeScript 1.0 spec (April 2014): 3.4.1
+                                // The scope of a type parameter extends over the entire declaration with which the type
+                                // parameter list is associated, with the exception of static member declarations in classes.
+                                error(errorLocation, ts.Diagnostics.Static_members_cannot_reference_class_type_parameters);
+                                return undefined;
+                            }
+                            break loop;
                         }
-                    }
-                    else {
-                        tag = parseUnknownTag(atToken, tagName);
-                    }
-                    if (!tag) {
-                        // a badly malformed tag should not be added to the list of tags
-                        return;
-                    }
-                    addTag(tag, parseTagComments(indent + tag.end - tag.pos));
-                }
-                function parseTagComments(indent) {
-                    var comments = [];
-                    var state = 1 /* SawAsterisk */;
-                    var margin;
-                    function pushComment(text) {
-                        if (!margin) {
-                            margin = indent;
+                        if (location.kind === 199 /* ClassExpression */ && meaning & 32 /* Class */) {
+                            var className = location.name;
+                            if (className && name === className.text) {
+                                result = location.symbol;
+                                break loop;
+                            }
+                        }
+                        break;
+                    // It is not legal to reference a class's own type parameters from a computed property name that
+                    // belongs to the class. For example:
+                    //
+                    //   function foo<T>() { return '' }
+                    //   class C<T> { // <-- Class's own type parameter T
+                    //       [foo<T>()]() { } // <-- Reference to T from class's own computed property
+                    //   }
+                    //
+                    case 144 /* ComputedPropertyName */:
+                        grandparent = location.parent.parent;
+                        if (ts.isClassLike(grandparent) || grandparent.kind === 230 /* InterfaceDeclaration */) {
+                            // A reference to this grandparent's type parameters would be an error
+                            if (result = lookup(getSymbolOfNode(grandparent).members, name, meaning & 793064 /* Type */)) {
+                                error(errorLocation, ts.Diagnostics.A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type);
+                                return undefined;
+                            }
+                        }
+                        break;
+                    case 151 /* MethodDeclaration */:
+                    case 150 /* MethodSignature */:
+                    case 152 /* Constructor */:
+                    case 153 /* GetAccessor */:
+                    case 154 /* SetAccessor */:
+                    case 228 /* FunctionDeclaration */:
+                    case 187 /* ArrowFunction */:
+                        if (meaning & 3 /* Variable */ && name === "arguments") {
+                            result = argumentsSymbol;
+                            break loop;
+                        }
+                        break;
+                    case 186 /* FunctionExpression */:
+                        if (meaning & 3 /* Variable */ && name === "arguments") {
+                            result = argumentsSymbol;
+                            break loop;
+                        }
+                        if (meaning & 16 /* Function */) {
+                            var functionName = location.name;
+                            if (functionName && name === functionName.text) {
+                                result = location.symbol;
+                                break loop;
+                            }
+                        }
+                        break;
+                    case 147 /* Decorator */:
+                        // Decorators are resolved at the class declaration. Resolving at the parameter
+                        // or member would result in looking up locals in the method.
+                        //
+                        //   function y() {}
+                        //   class C {
+                        //       method(@y x, y) {} // <-- decorator y should be resolved at the class declaration, not the parameter.
+                        //   }
+                        //
+                        if (location.parent && location.parent.kind === 146 /* Parameter */) {
+                            location = location.parent;
+                        }
+                        //
+                        //   function y() {}
+                        //   class C {
+                        //       @y method(x, y) {} // <-- decorator y should be resolved at the class declaration, not the method.
+                        //   }
+                        //
+                        if (location.parent && ts.isClassElement(location.parent)) {
+                            location = location.parent;
                         }
-                        comments.push(text);
-                        indent += text.length;
-                    }
-                    while (token() !== 55 /* AtToken */ && token() !== 1 /* EndOfFileToken */) {
-                        switch (token()) {
-                            case 4 /* NewLineTrivia */:
-                                if (state >= 1 /* SawAsterisk */) {
-                                    state = 0 /* BeginningOfLine */;
-                                    comments.push(scanner.getTokenText());
-                                }
-                                indent = 0;
-                                break;
-                            case 55 /* AtToken */:
-                                // Done
-                                break;
-                            case 5 /* WhitespaceTrivia */:
-                                if (state === 2 /* SavingComments */) {
-                                    pushComment(scanner.getTokenText());
-                                }
-                                else {
-                                    var whitespace = scanner.getTokenText();
-                                    // if the whitespace crosses the margin, take only the whitespace that passes the margin
-                                    if (margin !== undefined && indent + whitespace.length > margin) {
-                                        comments.push(whitespace.slice(margin - indent - 1));
-                                    }
-                                    indent += whitespace.length;
-                                }
-                                break;
-                            case 37 /* AsteriskToken */:
-                                if (state === 0 /* BeginningOfLine */) {
-                                    // leading asterisks start recording on the *next* (non-whitespace) token
-                                    state = 1 /* SawAsterisk */;
-                                    indent += scanner.getTokenText().length;
-                                    break;
-                                }
-                            // FALLTHROUGH otherwise to record the * as a comment
-                            default:
-                                state = 2 /* SavingComments */; // leading identifiers start recording as well
-                                pushComment(scanner.getTokenText());
-                                break;
+                        break;
+                }
+                lastLocation = location;
+                location = location.parent;
+            }
+            if (result && nameNotFoundMessage && noUnusedIdentifiers) {
+                result.isReferenced = true;
+            }
+            if (!result) {
+                result = lookup(globals, name, meaning);
+            }
+            if (!result) {
+                if (nameNotFoundMessage) {
+                    if (!errorLocation ||
+                        !checkAndReportErrorForMissingPrefix(errorLocation, name, nameArg) &&
+                            !checkAndReportErrorForExtendingInterface(errorLocation) &&
+                            !checkAndReportErrorForUsingTypeAsNamespace(errorLocation, name, meaning) &&
+                            !checkAndReportErrorForUsingTypeAsValue(errorLocation, name, meaning) &&
+                            !checkAndReportErrorForUsingNamespaceModuleAsValue(errorLocation, name, meaning)) {
+                        var suggestion = void 0;
+                        if (suggestedNameNotFoundMessage && suggestionCount < maximumSuggestionCount) {
+                            suggestion = getSuggestionForNonexistentSymbol(originalLocation, name, meaning);
+                            if (suggestion) {
+                                error(errorLocation, suggestedNameNotFoundMessage, typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg), suggestion);
+                            }
                         }
-                        if (token() === 55 /* AtToken */) {
-                            // Done
-                            break;
+                        if (!suggestion) {
+                            error(errorLocation, nameNotFoundMessage, typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg));
                         }
-                        nextJSDocToken();
+                        suggestionCount++;
                     }
-                    removeLeadingNewlines(comments);
-                    removeTrailingNewlines(comments);
-                    return comments;
                 }
-                function parseUnknownTag(atToken, tagName) {
-                    var result = createNode(274 /* JSDocTag */, atToken.pos);
-                    result.atToken = atToken;
-                    result.tagName = tagName;
-                    return finishNode(result);
+                return undefined;
+            }
+            // Perform extra checks only if error reporting was requested
+            if (nameNotFoundMessage) {
+                if (propertyWithInvalidInitializer) {
+                    // We have a match, but the reference occurred within a property initializer and the identifier also binds
+                    // to a local variable in the constructor where the code will be emitted.
+                    var propertyName = propertyWithInvalidInitializer.name;
+                    error(errorLocation, ts.Diagnostics.Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor, ts.declarationNameToString(propertyName), typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg));
+                    return undefined;
                 }
-                function addTag(tag, comments) {
-                    tag.comment = comments.join("");
-                    if (!tags) {
-                        tags = createNodeArray([tag], tag.pos);
+                // Only check for block-scoped variable if we are looking for the
+                // name with variable meaning
+                //      For example,
+                //          declare module foo {
+                //              interface bar {}
+                //          }
+                //      const foo/*1*/: foo/*2*/.bar;
+                // The foo at /*1*/ and /*2*/ will share same symbol with two meanings:
+                // block-scoped variable and namespace module. However, only when we
+                // try to resolve name in /*1*/ which is used in variable position,
+                // we want to check for block-scoped
+                if (meaning & 2 /* BlockScopedVariable */ ||
+                    ((meaning & 32 /* Class */ || meaning & 384 /* Enum */) && (meaning & 107455 /* Value */) === 107455 /* Value */)) {
+                    var exportOrLocalSymbol = getExportSymbolOfValueSymbolIfExported(result);
+                    if (exportOrLocalSymbol.flags & 2 /* BlockScopedVariable */ || exportOrLocalSymbol.flags & 32 /* Class */ || exportOrLocalSymbol.flags & 384 /* Enum */) {
+                        checkResolvedBlockScopedVariable(exportOrLocalSymbol, errorLocation);
                     }
-                    else {
-                        tags.push(tag);
+                }
+                // If we're in an external module, we can't reference value symbols created from UMD export declarations
+                if (result && isInExternalModule && (meaning & 107455 /* Value */) === 107455 /* Value */) {
+                    var decls = result.declarations;
+                    if (decls && decls.length === 1 && decls[0].kind === 236 /* NamespaceExportDeclaration */) {
+                        error(errorLocation, ts.Diagnostics._0_refers_to_a_UMD_global_but_the_current_file_is_a_module_Consider_adding_an_import_instead, name);
                     }
-                    tags.end = tag.end;
                 }
-                function tryParseTypeExpression() {
-                    return tryParse(function () {
-                        skipWhitespace();
-                        if (token() !== 15 /* OpenBraceToken */) {
-                            return undefined;
-                        }
-                        return parseJSDocTypeExpression();
-                    });
+            }
+            return result;
+        }
+        function isTypeParameterSymbolDeclaredInContainer(symbol, container) {
+            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                var decl = _a[_i];
+                if (decl.kind === 145 /* TypeParameter */ && decl.parent === container) {
+                    return true;
                 }
-                function parseParamTag(atToken, tagName) {
-                    var typeExpression = tryParseTypeExpression();
-                    skipWhitespace();
-                    var name;
-                    var isBracketed;
-                    // Looking for something like '[foo]' or 'foo'
-                    if (parseOptionalToken(19 /* OpenBracketToken */)) {
-                        name = parseJSDocIdentifierName();
-                        skipWhitespace();
-                        isBracketed = true;
-                        // May have an optional default, e.g. '[foo = 42]'
-                        if (parseOptionalToken(56 /* EqualsToken */)) {
-                            parseExpression();
-                        }
-                        parseExpected(20 /* CloseBracketToken */);
-                    }
-                    else if (ts.tokenIsIdentifierOrKeyword(token())) {
-                        name = parseJSDocIdentifierName();
-                    }
-                    if (!name) {
-                        parseErrorAtPosition(scanner.getStartPos(), 0, ts.Diagnostics.Identifier_expected);
-                        return undefined;
-                    }
-                    var preName, postName;
-                    if (typeExpression) {
-                        postName = name;
+            }
+            return false;
+        }
+        function checkAndReportErrorForMissingPrefix(errorLocation, name, nameArg) {
+            if ((errorLocation.kind === 71 /* Identifier */ && (isTypeReferenceIdentifier(errorLocation)) || isInTypeQuery(errorLocation))) {
+                return false;
+            }
+            var container = ts.getThisContainer(errorLocation, /*includeArrowFunctions*/ true);
+            var location = container;
+            while (location) {
+                if (ts.isClassLike(location.parent)) {
+                    var classSymbol = getSymbolOfNode(location.parent);
+                    if (!classSymbol) {
+                        break;
                     }
-                    else {
-                        preName = name;
+                    // Check to see if a static member exists.
+                    var constructorType = getTypeOfSymbol(classSymbol);
+                    if (getPropertyOfType(constructorType, name)) {
+                        error(errorLocation, ts.Diagnostics.Cannot_find_name_0_Did_you_mean_the_static_member_1_0, typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg), symbolToString(classSymbol));
+                        return true;
                     }
-                    if (!typeExpression) {
-                        typeExpression = tryParseTypeExpression();
+                    // No static member is present.
+                    // Check if we're in an instance method and look for a relevant instance member.
+                    if (location === container && !(ts.getModifierFlags(location) & 32 /* Static */)) {
+                        var instanceType = getDeclaredTypeOfSymbol(classSymbol).thisType;
+                        if (getPropertyOfType(instanceType, name)) {
+                            error(errorLocation, ts.Diagnostics.Cannot_find_name_0_Did_you_mean_the_instance_member_this_0, typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg));
+                            return true;
+                        }
                     }
-                    var result = createNode(275 /* JSDocParameterTag */, atToken.pos);
-                    result.atToken = atToken;
-                    result.tagName = tagName;
-                    result.preParameterName = preName;
-                    result.typeExpression = typeExpression;
-                    result.postParameterName = postName;
-                    result.parameterName = postName || preName;
-                    result.isBracketed = isBracketed;
-                    return finishNode(result);
                 }
-                function parseReturnTag(atToken, tagName) {
-                    if (ts.forEach(tags, function (t) { return t.kind === 276 /* JSDocReturnTag */; })) {
-                        parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, ts.Diagnostics._0_tag_already_specified, tagName.text);
-                    }
-                    var result = createNode(276 /* JSDocReturnTag */, atToken.pos);
-                    result.atToken = atToken;
-                    result.tagName = tagName;
-                    result.typeExpression = tryParseTypeExpression();
-                    return finishNode(result);
+                location = location.parent;
+            }
+            return false;
+        }
+        function checkAndReportErrorForExtendingInterface(errorLocation) {
+            var expression = getEntityNameForExtendingInterface(errorLocation);
+            var isError = !!(expression && resolveEntityName(expression, 64 /* Interface */, /*ignoreErrors*/ true));
+            if (isError) {
+                error(errorLocation, ts.Diagnostics.Cannot_extend_an_interface_0_Did_you_mean_implements, ts.getTextOfNode(expression));
+            }
+            return isError;
+        }
+        /**
+         * Climbs up parents to an ExpressionWithTypeArguments, and returns its expression,
+         * but returns undefined if that expression is not an EntityNameExpression.
+         */
+        function getEntityNameForExtendingInterface(node) {
+            switch (node.kind) {
+                case 71 /* Identifier */:
+                case 179 /* PropertyAccessExpression */:
+                    return node.parent ? getEntityNameForExtendingInterface(node.parent) : undefined;
+                case 201 /* ExpressionWithTypeArguments */:
+                    ts.Debug.assert(ts.isEntityNameExpression(node.expression));
+                    return node.expression;
+                default:
+                    return undefined;
+            }
+        }
+        function checkAndReportErrorForUsingTypeAsNamespace(errorLocation, name, meaning) {
+            if (meaning === 1920 /* Namespace */) {
+                var symbol = resolveSymbol(resolveName(errorLocation, name, 793064 /* Type */ & ~107455 /* Value */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined));
+                if (symbol) {
+                    error(errorLocation, ts.Diagnostics._0_only_refers_to_a_type_but_is_being_used_as_a_namespace_here, name);
+                    return true;
                 }
-                function parseTypeTag(atToken, tagName) {
-                    if (ts.forEach(tags, function (t) { return t.kind === 277 /* JSDocTypeTag */; })) {
-                        parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, ts.Diagnostics._0_tag_already_specified, tagName.text);
-                    }
-                    var result = createNode(277 /* JSDocTypeTag */, atToken.pos);
-                    result.atToken = atToken;
-                    result.tagName = tagName;
-                    result.typeExpression = tryParseTypeExpression();
-                    return finishNode(result);
+            }
+            return false;
+        }
+        function checkAndReportErrorForUsingTypeAsValue(errorLocation, name, meaning) {
+            if (meaning & (107455 /* Value */ & ~1024 /* NamespaceModule */)) {
+                if (name === "any" || name === "string" || name === "number" || name === "boolean" || name === "never") {
+                    error(errorLocation, ts.Diagnostics._0_only_refers_to_a_type_but_is_being_used_as_a_value_here, name);
+                    return true;
                 }
-                function parsePropertyTag(atToken, tagName) {
-                    var typeExpression = tryParseTypeExpression();
-                    skipWhitespace();
-                    var name = parseJSDocIdentifierName();
-                    skipWhitespace();
-                    if (!name) {
-                        parseErrorAtPosition(scanner.getStartPos(), /*length*/ 0, ts.Diagnostics.Identifier_expected);
-                        return undefined;
-                    }
-                    var result = createNode(280 /* JSDocPropertyTag */, atToken.pos);
-                    result.atToken = atToken;
-                    result.tagName = tagName;
-                    result.name = name;
-                    result.typeExpression = typeExpression;
-                    return finishNode(result);
+                var symbol = resolveSymbol(resolveName(errorLocation, name, 793064 /* Type */ & ~107455 /* Value */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined));
+                if (symbol && !(symbol.flags & 1024 /* NamespaceModule */)) {
+                    error(errorLocation, ts.Diagnostics._0_only_refers_to_a_type_but_is_being_used_as_a_value_here, name);
+                    return true;
                 }
-                function parseTypedefTag(atToken, tagName) {
-                    var typeExpression = tryParseTypeExpression();
-                    skipWhitespace();
-                    var typedefTag = createNode(279 /* JSDocTypedefTag */, atToken.pos);
-                    typedefTag.atToken = atToken;
-                    typedefTag.tagName = tagName;
-                    typedefTag.name = parseJSDocIdentifierName();
-                    typedefTag.typeExpression = typeExpression;
-                    skipWhitespace();
-                    if (typeExpression) {
-                        if (typeExpression.type.kind === 267 /* JSDocTypeReference */) {
-                            var jsDocTypeReference = typeExpression.type;
-                            if (jsDocTypeReference.name.kind === 69 /* Identifier */) {
-                                var name_11 = jsDocTypeReference.name;
-                                if (name_11.text === "Object") {
-                                    typedefTag.jsDocTypeLiteral = scanChildTags();
-                                }
-                            }
-                        }
-                        if (!typedefTag.jsDocTypeLiteral) {
-                            typedefTag.jsDocTypeLiteral = typeExpression.type;
-                        }
+            }
+            return false;
+        }
+        function checkAndReportErrorForUsingNamespaceModuleAsValue(errorLocation, name, meaning) {
+            if (meaning & (107455 /* Value */ & ~1024 /* NamespaceModule */ & ~793064 /* Type */)) {
+                var symbol = resolveSymbol(resolveName(errorLocation, name, 1024 /* NamespaceModule */ & ~107455 /* Value */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined));
+                if (symbol) {
+                    error(errorLocation, ts.Diagnostics.Cannot_use_namespace_0_as_a_value, name);
+                    return true;
+                }
+            }
+            else if (meaning & (793064 /* Type */ & ~1024 /* NamespaceModule */ & ~107455 /* Value */)) {
+                var symbol = resolveSymbol(resolveName(errorLocation, name, 1024 /* NamespaceModule */ & ~793064 /* Type */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined));
+                if (symbol) {
+                    error(errorLocation, ts.Diagnostics.Cannot_use_namespace_0_as_a_type, name);
+                    return true;
+                }
+            }
+            return false;
+        }
+        function checkResolvedBlockScopedVariable(result, errorLocation) {
+            ts.Debug.assert(!!(result.flags & 2 /* BlockScopedVariable */ || result.flags & 32 /* Class */ || result.flags & 384 /* Enum */));
+            // Block-scoped variables cannot be used before their definition
+            var declaration = ts.forEach(result.declarations, function (d) { return ts.isBlockOrCatchScoped(d) || ts.isClassLike(d) || (d.kind === 232 /* EnumDeclaration */) ? d : undefined; });
+            ts.Debug.assert(declaration !== undefined, "Declaration to checkResolvedBlockScopedVariable is undefined");
+            if (!ts.isInAmbientContext(declaration) && !isBlockScopedNameDeclaredBeforeUse(declaration, errorLocation)) {
+                if (result.flags & 2 /* BlockScopedVariable */) {
+                    error(errorLocation, ts.Diagnostics.Block_scoped_variable_0_used_before_its_declaration, ts.declarationNameToString(ts.getNameOfDeclaration(declaration)));
+                }
+                else if (result.flags & 32 /* Class */) {
+                    error(errorLocation, ts.Diagnostics.Class_0_used_before_its_declaration, ts.declarationNameToString(ts.getNameOfDeclaration(declaration)));
+                }
+                else if (result.flags & 256 /* RegularEnum */) {
+                    error(errorLocation, ts.Diagnostics.Enum_0_used_before_its_declaration, ts.declarationNameToString(ts.getNameOfDeclaration(declaration)));
+                }
+            }
+        }
+        /* Starting from 'initial' node walk up the parent chain until 'stopAt' node is reached.
+         * If at any point current node is equal to 'parent' node - return true.
+         * Return false if 'stopAt' node is reached or isFunctionLike(current) === true.
+         */
+        function isSameScopeDescendentOf(initial, parent, stopAt) {
+            return parent && !!ts.findAncestor(initial, function (n) { return n === stopAt || ts.isFunctionLike(n) ? "quit" : n === parent; });
+        }
+        function getAnyImportSyntax(node) {
+            if (ts.isAliasSymbolDeclaration(node)) {
+                if (node.kind === 237 /* ImportEqualsDeclaration */) {
+                    return node;
+                }
+                return ts.findAncestor(node, ts.isImportDeclaration);
+            }
+        }
+        function getDeclarationOfAliasSymbol(symbol) {
+            return ts.find(symbol.declarations, ts.isAliasSymbolDeclaration);
+        }
+        function getTargetOfImportEqualsDeclaration(node, dontResolveAlias) {
+            if (node.moduleReference.kind === 248 /* ExternalModuleReference */) {
+                return resolveExternalModuleSymbol(resolveExternalModuleName(node, ts.getExternalModuleImportEqualsDeclarationExpression(node)));
+            }
+            return getSymbolOfPartOfRightHandSideOfImportEquals(node.moduleReference, dontResolveAlias);
+        }
+        function getTargetOfImportClause(node, dontResolveAlias) {
+            var moduleSymbol = resolveExternalModuleName(node, node.parent.moduleSpecifier);
+            if (moduleSymbol) {
+                var exportDefaultSymbol = void 0;
+                if (ts.isShorthandAmbientModuleSymbol(moduleSymbol)) {
+                    exportDefaultSymbol = moduleSymbol;
+                }
+                else {
+                    var exportValue = moduleSymbol.exports.get("export=");
+                    exportDefaultSymbol = exportValue
+                        ? getPropertyOfType(getTypeOfSymbol(exportValue), "default")
+                        : resolveSymbol(moduleSymbol.exports.get("default"), dontResolveAlias);
+                }
+                if (!exportDefaultSymbol && !allowSyntheticDefaultImports) {
+                    error(node.name, ts.Diagnostics.Module_0_has_no_default_export, symbolToString(moduleSymbol));
+                }
+                else if (!exportDefaultSymbol && allowSyntheticDefaultImports) {
+                    return resolveExternalModuleSymbol(moduleSymbol, dontResolveAlias) || resolveSymbol(moduleSymbol, dontResolveAlias);
+                }
+                return exportDefaultSymbol;
+            }
+        }
+        function getTargetOfNamespaceImport(node, dontResolveAlias) {
+            var moduleSpecifier = node.parent.parent.moduleSpecifier;
+            return resolveESModuleSymbol(resolveExternalModuleName(node, moduleSpecifier), moduleSpecifier, dontResolveAlias);
+        }
+        // This function creates a synthetic symbol that combines the value side of one symbol with the
+        // type/namespace side of another symbol. Consider this example:
+        //
+        //   declare module graphics {
+        //       interface Point {
+        //           x: number;
+        //           y: number;
+        //       }
+        //   }
+        //   declare var graphics: {
+        //       Point: new (x: number, y: number) => graphics.Point;
+        //   }
+        //   declare module "graphics" {
+        //       export = graphics;
+        //   }
+        //
+        // An 'import { Point } from "graphics"' needs to create a symbol that combines the value side 'Point'
+        // property with the type/namespace side interface 'Point'.
+        function combineValueAndTypeSymbols(valueSymbol, typeSymbol) {
+            if (valueSymbol === unknownSymbol && typeSymbol === unknownSymbol) {
+                return unknownSymbol;
+            }
+            if (valueSymbol.flags & (793064 /* Type */ | 1920 /* Namespace */)) {
+                return valueSymbol;
+            }
+            var result = createSymbol(valueSymbol.flags | typeSymbol.flags, valueSymbol.name);
+            result.declarations = ts.concatenate(valueSymbol.declarations, typeSymbol.declarations);
+            result.parent = valueSymbol.parent || typeSymbol.parent;
+            if (valueSymbol.valueDeclaration)
+                result.valueDeclaration = valueSymbol.valueDeclaration;
+            if (typeSymbol.members)
+                result.members = typeSymbol.members;
+            if (valueSymbol.exports)
+                result.exports = valueSymbol.exports;
+            return result;
+        }
+        function getExportOfModule(symbol, name, dontResolveAlias) {
+            if (symbol.flags & 1536 /* Module */) {
+                return resolveSymbol(getExportsOfSymbol(symbol).get(name), dontResolveAlias);
+            }
+        }
+        function getPropertyOfVariable(symbol, name) {
+            if (symbol.flags & 3 /* Variable */) {
+                var typeAnnotation = symbol.valueDeclaration.type;
+                if (typeAnnotation) {
+                    return resolveSymbol(getPropertyOfType(getTypeFromTypeNode(typeAnnotation), name));
+                }
+            }
+        }
+        function getExternalModuleMember(node, specifier, dontResolveAlias) {
+            var moduleSymbol = resolveExternalModuleName(node, node.moduleSpecifier);
+            var targetSymbol = resolveESModuleSymbol(moduleSymbol, node.moduleSpecifier, dontResolveAlias);
+            if (targetSymbol) {
+                var name_10 = specifier.propertyName || specifier.name;
+                if (name_10.text) {
+                    if (ts.isShorthandAmbientModuleSymbol(moduleSymbol)) {
+                        return moduleSymbol;
                     }
-                    else {
-                        typedefTag.jsDocTypeLiteral = scanChildTags();
+                    var symbolFromVariable = void 0;
+                    // First check if module was specified with "export=". If so, get the member from the resolved type
+                    if (moduleSymbol && moduleSymbol.exports && moduleSymbol.exports.get("export=")) {
+                        symbolFromVariable = getPropertyOfType(getTypeOfSymbol(targetSymbol), name_10.text);
                     }
-                    return finishNode(typedefTag);
-                    function scanChildTags() {
-                        var jsDocTypeLiteral = createNode(281 /* JSDocTypeLiteral */, scanner.getStartPos());
-                        var resumePos = scanner.getStartPos();
-                        var canParseTag = true;
-                        var seenAsterisk = false;
-                        var parentTagTerminated = false;
-                        while (token() !== 1 /* EndOfFileToken */ && !parentTagTerminated) {
-                            nextJSDocToken();
-                            switch (token()) {
-                                case 55 /* AtToken */:
-                                    if (canParseTag) {
-                                        parentTagTerminated = !tryParseChildTag(jsDocTypeLiteral);
-                                        if (!parentTagTerminated) {
-                                            resumePos = scanner.getStartPos();
-                                        }
-                                    }
-                                    seenAsterisk = false;
-                                    break;
-                                case 4 /* NewLineTrivia */:
-                                    resumePos = scanner.getStartPos() - 1;
-                                    canParseTag = true;
-                                    seenAsterisk = false;
-                                    break;
-                                case 37 /* AsteriskToken */:
-                                    if (seenAsterisk) {
-                                        canParseTag = false;
-                                    }
-                                    seenAsterisk = true;
-                                    break;
-                                case 69 /* Identifier */:
-                                    canParseTag = false;
-                                case 1 /* EndOfFileToken */:
-                                    break;
-                            }
-                        }
-                        scanner.setTextPos(resumePos);
-                        return finishNode(jsDocTypeLiteral);
+                    else {
+                        symbolFromVariable = getPropertyOfVariable(targetSymbol, name_10.text);
                     }
-                }
-                function tryParseChildTag(parentTag) {
-                    ts.Debug.assert(token() === 55 /* AtToken */);
-                    var atToken = createNode(55 /* AtToken */, scanner.getStartPos());
-                    atToken.end = scanner.getTextPos();
-                    nextJSDocToken();
-                    var tagName = parseJSDocIdentifierName();
-                    skipWhitespace();
-                    if (!tagName) {
-                        return false;
+                    // if symbolFromVariable is export - get its final target
+                    symbolFromVariable = resolveSymbol(symbolFromVariable, dontResolveAlias);
+                    var symbolFromModule = getExportOfModule(targetSymbol, name_10.text, dontResolveAlias);
+                    // If the export member we're looking for is default, and there is no real default but allowSyntheticDefaultImports is on, return the entire module as the default
+                    if (!symbolFromModule && allowSyntheticDefaultImports && name_10.text === "default") {
+                        symbolFromModule = resolveExternalModuleSymbol(moduleSymbol, dontResolveAlias) || resolveSymbol(moduleSymbol, dontResolveAlias);
                     }
-                    switch (tagName.text) {
-                        case "type":
-                            if (parentTag.jsDocTypeTag) {
-                                // already has a @type tag, terminate the parent tag now.
-                                return false;
-                            }
-                            parentTag.jsDocTypeTag = parseTypeTag(atToken, tagName);
-                            return true;
-                        case "prop":
-                        case "property":
-                            if (!parentTag.jsDocPropertyTags) {
-                                parentTag.jsDocPropertyTags = [];
-                            }
-                            var propertyTag = parsePropertyTag(atToken, tagName);
-                            parentTag.jsDocPropertyTags.push(propertyTag);
-                            return true;
+                    var symbol = symbolFromModule && symbolFromVariable ?
+                        combineValueAndTypeSymbols(symbolFromVariable, symbolFromModule) :
+                        symbolFromModule || symbolFromVariable;
+                    if (!symbol) {
+                        error(name_10, ts.Diagnostics.Module_0_has_no_exported_member_1, getFullyQualifiedName(moduleSymbol), ts.declarationNameToString(name_10));
                     }
-                    return false;
+                    return symbol;
                 }
-                function parseTemplateTag(atToken, tagName) {
-                    if (ts.forEach(tags, function (t) { return t.kind === 278 /* JSDocTemplateTag */; })) {
-                        parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, ts.Diagnostics._0_tag_already_specified, tagName.text);
-                    }
-                    // Type parameter list looks like '@template T,U,V'
-                    var typeParameters = createNodeArray();
-                    while (true) {
-                        var name_12 = parseJSDocIdentifierName();
-                        skipWhitespace();
-                        if (!name_12) {
-                            parseErrorAtPosition(scanner.getStartPos(), 0, ts.Diagnostics.Identifier_expected);
-                            return undefined;
-                        }
-                        var typeParameter = createNode(141 /* TypeParameter */, name_12.pos);
-                        typeParameter.name = name_12;
-                        finishNode(typeParameter);
-                        typeParameters.push(typeParameter);
-                        if (token() === 24 /* CommaToken */) {
-                            nextJSDocToken();
-                            skipWhitespace();
-                        }
-                        else {
-                            break;
-                        }
-                    }
-                    var result = createNode(278 /* JSDocTemplateTag */, atToken.pos);
-                    result.atToken = atToken;
-                    result.tagName = tagName;
-                    result.typeParameters = typeParameters;
-                    finishNode(result);
-                    typeParameters.end = result.end;
-                    return result;
+            }
+        }
+        function getTargetOfImportSpecifier(node, dontResolveAlias) {
+            return getExternalModuleMember(node.parent.parent.parent, node, dontResolveAlias);
+        }
+        function getTargetOfNamespaceExportDeclaration(node, dontResolveAlias) {
+            return resolveExternalModuleSymbol(node.parent.symbol, dontResolveAlias);
+        }
+        function getTargetOfExportSpecifier(node, meaning, dontResolveAlias) {
+            return node.parent.parent.moduleSpecifier ?
+                getExternalModuleMember(node.parent.parent, node, dontResolveAlias) :
+                resolveEntityName(node.propertyName || node.name, meaning, /*ignoreErrors*/ false, dontResolveAlias);
+        }
+        function getTargetOfExportAssignment(node, dontResolveAlias) {
+            return resolveEntityName(node.expression, 107455 /* Value */ | 793064 /* Type */ | 1920 /* Namespace */, /*ignoreErrors*/ false, dontResolveAlias);
+        }
+        function getTargetOfAliasDeclaration(node, dontRecursivelyResolve) {
+            switch (node.kind) {
+                case 237 /* ImportEqualsDeclaration */:
+                    return getTargetOfImportEqualsDeclaration(node, dontRecursivelyResolve);
+                case 239 /* ImportClause */:
+                    return getTargetOfImportClause(node, dontRecursivelyResolve);
+                case 240 /* NamespaceImport */:
+                    return getTargetOfNamespaceImport(node, dontRecursivelyResolve);
+                case 242 /* ImportSpecifier */:
+                    return getTargetOfImportSpecifier(node, dontRecursivelyResolve);
+                case 246 /* ExportSpecifier */:
+                    return getTargetOfExportSpecifier(node, 107455 /* Value */ | 793064 /* Type */ | 1920 /* Namespace */, dontRecursivelyResolve);
+                case 243 /* ExportAssignment */:
+                    return getTargetOfExportAssignment(node, dontRecursivelyResolve);
+                case 236 /* NamespaceExportDeclaration */:
+                    return getTargetOfNamespaceExportDeclaration(node, dontRecursivelyResolve);
+            }
+        }
+        /**
+         * Indicates that a symbol is an alias that does not merge with a local declaration.
+         */
+        function isNonLocalAlias(symbol, excludes) {
+            if (excludes === void 0) { excludes = 107455 /* Value */ | 793064 /* Type */ | 1920 /* Namespace */; }
+            return symbol && (symbol.flags & (8388608 /* Alias */ | excludes)) === 8388608 /* Alias */;
+        }
+        function resolveSymbol(symbol, dontResolveAlias) {
+            var shouldResolve = !dontResolveAlias && isNonLocalAlias(symbol);
+            return shouldResolve ? resolveAlias(symbol) : symbol;
+        }
+        function resolveAlias(symbol) {
+            ts.Debug.assert((symbol.flags & 8388608 /* Alias */) !== 0, "Should only get Alias here.");
+            var links = getSymbolLinks(symbol);
+            if (!links.target) {
+                links.target = resolvingSymbol;
+                var node = getDeclarationOfAliasSymbol(symbol);
+                ts.Debug.assert(!!node);
+                var target = getTargetOfAliasDeclaration(node);
+                if (links.target === resolvingSymbol) {
+                    links.target = target || unknownSymbol;
+                }
+                else {
+                    error(node, ts.Diagnostics.Circular_definition_of_import_alias_0, symbolToString(symbol));
+                }
+            }
+            else if (links.target === resolvingSymbol) {
+                links.target = unknownSymbol;
+            }
+            return links.target;
+        }
+        function markExportAsReferenced(node) {
+            var symbol = getSymbolOfNode(node);
+            var target = resolveAlias(symbol);
+            if (target) {
+                var markAlias = target === unknownSymbol ||
+                    ((target.flags & 107455 /* Value */) && !isConstEnumOrConstEnumOnlyModule(target));
+                if (markAlias) {
+                    markAliasSymbolAsReferenced(symbol);
+                }
+            }
+        }
+        // When an alias symbol is referenced, we need to mark the entity it references as referenced and in turn repeat that until
+        // we reach a non-alias or an exported entity (which is always considered referenced). We do this by checking the target of
+        // the alias as an expression (which recursively takes us back here if the target references another alias).
+        function markAliasSymbolAsReferenced(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.referenced) {
+                links.referenced = true;
+                var node = getDeclarationOfAliasSymbol(symbol);
+                ts.Debug.assert(!!node);
+                if (node.kind === 243 /* ExportAssignment */) {
+                    // export default <symbol>
+                    checkExpressionCached(node.expression);
+                }
+                else if (node.kind === 246 /* ExportSpecifier */) {
+                    // export { <symbol> } or export { <symbol> as foo }
+                    checkExpressionCached(node.propertyName || node.name);
+                }
+                else if (ts.isInternalModuleImportEqualsDeclaration(node)) {
+                    // import foo = <symbol>
+                    checkExpressionCached(node.moduleReference);
+                }
+            }
+        }
+        // This function is only for imports with entity names
+        function getSymbolOfPartOfRightHandSideOfImportEquals(entityName, dontResolveAlias) {
+            // There are three things we might try to look for. In the following examples,
+            // the search term is enclosed in |...|:
+            //
+            //     import a = |b|; // Namespace
+            //     import a = |b.c|; // Value, type, namespace
+            //     import a = |b.c|.d; // Namespace
+            if (entityName.kind === 71 /* Identifier */ && ts.isRightSideOfQualifiedNameOrPropertyAccess(entityName)) {
+                entityName = entityName.parent;
+            }
+            // Check for case 1 and 3 in the above example
+            if (entityName.kind === 71 /* Identifier */ || entityName.parent.kind === 143 /* QualifiedName */) {
+                return resolveEntityName(entityName, 1920 /* Namespace */, /*ignoreErrors*/ false, dontResolveAlias);
+            }
+            else {
+                // Case 2 in above example
+                // entityName.kind could be a QualifiedName or a Missing identifier
+                ts.Debug.assert(entityName.parent.kind === 237 /* ImportEqualsDeclaration */);
+                return resolveEntityName(entityName, 107455 /* Value */ | 793064 /* Type */ | 1920 /* Namespace */, /*ignoreErrors*/ false, dontResolveAlias);
+            }
+        }
+        function getFullyQualifiedName(symbol) {
+            return symbol.parent ? getFullyQualifiedName(symbol.parent) + "." + symbolToString(symbol) : symbolToString(symbol);
+        }
+        /**
+         * Resolves a qualified name and any involved aliases.
+         */
+        function resolveEntityName(name, meaning, ignoreErrors, dontResolveAlias, location) {
+            if (ts.nodeIsMissing(name)) {
+                return undefined;
+            }
+            var symbol;
+            if (name.kind === 71 /* Identifier */) {
+                var message = meaning === 1920 /* Namespace */ ? ts.Diagnostics.Cannot_find_namespace_0 : ts.Diagnostics.Cannot_find_name_0;
+                symbol = resolveName(location || name, name.text, meaning, ignoreErrors ? undefined : message, name);
+                if (!symbol) {
+                    return undefined;
                 }
-                function nextJSDocToken() {
-                    return currentToken = scanner.scanJSDocToken();
+            }
+            else if (name.kind === 143 /* QualifiedName */ || name.kind === 179 /* PropertyAccessExpression */) {
+                var left = void 0;
+                if (name.kind === 143 /* QualifiedName */) {
+                    left = name.left;
                 }
-                function parseJSDocIdentifierName() {
-                    return createJSDocIdentifier(ts.tokenIsIdentifierOrKeyword(token()));
+                else if (name.kind === 179 /* PropertyAccessExpression */ &&
+                    (name.expression.kind === 185 /* ParenthesizedExpression */ || ts.isEntityNameExpression(name.expression))) {
+                    left = name.expression;
                 }
-                function createJSDocIdentifier(isIdentifier) {
-                    if (!isIdentifier) {
-                        parseErrorAtCurrentToken(ts.Diagnostics.Identifier_expected);
-                        return undefined;
+                else {
+                    // If the expression in property-access expression is not entity-name or parenthsizedExpression (e.g. it is a call expression), it won't be able to successfully resolve the name.
+                    // This is the case when we are trying to do any language service operation in heritage clauses. By return undefined, the getSymbolOfEntityNameOrPropertyAccessExpression
+                    // will attempt to checkPropertyAccessExpression to resolve symbol.
+                    // i.e class C extends foo()./*do language service operation here*/B {}
+                    return undefined;
+                }
+                var right = name.kind === 143 /* QualifiedName */ ? name.right : name.name;
+                var namespace = resolveEntityName(left, 1920 /* Namespace */, ignoreErrors, /*dontResolveAlias*/ false, location);
+                if (!namespace || ts.nodeIsMissing(right)) {
+                    return undefined;
+                }
+                else if (namespace === unknownSymbol) {
+                    return namespace;
+                }
+                symbol = getSymbol(getExportsOfSymbol(namespace), right.text, meaning);
+                if (!symbol) {
+                    if (!ignoreErrors) {
+                        error(right, ts.Diagnostics.Namespace_0_has_no_exported_member_1, getFullyQualifiedName(namespace), ts.declarationNameToString(right));
                     }
-                    var pos = scanner.getTokenPos();
-                    var end = scanner.getTextPos();
-                    var result = createNode(69 /* Identifier */, pos);
-                    result.text = content.substring(pos, end);
-                    finishNode(result, end);
-                    nextJSDocToken();
-                    return result;
+                    return undefined;
                 }
             }
-            JSDocParser.parseJSDocCommentWorker = parseJSDocCommentWorker;
-        })(JSDocParser = Parser.JSDocParser || (Parser.JSDocParser = {}));
-    })(Parser || (Parser = {}));
-    var IncrementalParser;
-    (function (IncrementalParser) {
-        function updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks) {
-            aggressiveChecks = aggressiveChecks || ts.Debug.shouldAssert(2 /* Aggressive */);
-            checkChangeRange(sourceFile, newText, textChangeRange, aggressiveChecks);
-            if (ts.textChangeRangeIsUnchanged(textChangeRange)) {
-                // if the text didn't change, then we can just return our current source file as-is.
-                return sourceFile;
+            else if (name.kind === 185 /* ParenthesizedExpression */) {
+                // If the expression in parenthesizedExpression is not an entity-name (e.g. it is a call expression), it won't be able to successfully resolve the name.
+                // This is the case when we are trying to do any language service operation in heritage clauses.
+                // By return undefined, the getSymbolOfEntityNameOrPropertyAccessExpression will attempt to checkPropertyAccessExpression to resolve symbol.
+                // i.e class C extends foo()./*do language service operation here*/B {}
+                return ts.isEntityNameExpression(name.expression) ?
+                    resolveEntityName(name.expression, meaning, ignoreErrors, dontResolveAlias, location) :
+                    undefined;
             }
-            if (sourceFile.statements.length === 0) {
-                // If we don't have any statements in the current source file, then there's no real
-                // way to incrementally parse.  So just do a full parse instead.
-                return Parser.parseSourceFile(sourceFile.fileName, newText, sourceFile.languageVersion, /*syntaxCursor*/ undefined, /*setParentNodes*/ true, sourceFile.scriptKind);
+            else {
+                ts.Debug.fail("Unknown entity name kind.");
             }
-            // Make sure we're not trying to incrementally update a source file more than once.  Once
-            // we do an update the original source file is considered unusable from that point onwards.
-            //
-            // This is because we do incremental parsing in-place.  i.e. we take nodes from the old
-            // tree and give them new positions and parents.  From that point on, trusting the old
-            // tree at all is not possible as far too much of it may violate invariants.
-            var incrementalSourceFile = sourceFile;
-            ts.Debug.assert(!incrementalSourceFile.hasBeenIncrementallyParsed);
-            incrementalSourceFile.hasBeenIncrementallyParsed = true;
-            var oldText = sourceFile.text;
-            var syntaxCursor = createSyntaxCursor(sourceFile);
-            // Make the actual change larger so that we know to reparse anything whose lookahead
-            // might have intersected the change.
-            var changeRange = extendToAffectedRange(sourceFile, textChangeRange);
-            checkChangeRange(sourceFile, newText, changeRange, aggressiveChecks);
-            // Ensure that extending the affected range only moved the start of the change range
-            // earlier in the file.
-            ts.Debug.assert(changeRange.span.start <= textChangeRange.span.start);
-            ts.Debug.assert(ts.textSpanEnd(changeRange.span) === ts.textSpanEnd(textChangeRange.span));
-            ts.Debug.assert(ts.textSpanEnd(ts.textChangeRangeNewSpan(changeRange)) === ts.textSpanEnd(ts.textChangeRangeNewSpan(textChangeRange)));
-            // The is the amount the nodes after the edit range need to be adjusted.  It can be
-            // positive (if the edit added characters), negative (if the edit deleted characters)
-            // or zero (if this was a pure overwrite with nothing added/removed).
-            var delta = ts.textChangeRangeNewSpan(changeRange).length - changeRange.span.length;
-            // If we added or removed characters during the edit, then we need to go and adjust all
-            // the nodes after the edit.  Those nodes may move forward (if we inserted chars) or they
-            // may move backward (if we deleted chars).
-            //
-            // Doing this helps us out in two ways.  First, it means that any nodes/tokens we want
-            // to reuse are already at the appropriate position in the new text.  That way when we
-            // reuse them, we don't have to figure out if they need to be adjusted.  Second, it makes
-            // it very easy to determine if we can reuse a node.  If the node's position is at where
-            // we are in the text, then we can reuse it.  Otherwise we can't.  If the node's position
-            // is ahead of us, then we'll need to rescan tokens.  If the node's position is behind
-            // us, then we'll need to skip it or crumble it as appropriate
-            //
-            // We will also adjust the positions of nodes that intersect the change range as well.
-            // By doing this, we ensure that all the positions in the old tree are consistent, not
-            // just the positions of nodes entirely before/after the change range.  By being
-            // consistent, we can then easily map from positions to nodes in the old tree easily.
-            //
-            // Also, mark any syntax elements that intersect the changed span.  We know, up front,
-            // that we cannot reuse these elements.
-            updateTokenPositionsAndMarkElements(incrementalSourceFile, changeRange.span.start, ts.textSpanEnd(changeRange.span), ts.textSpanEnd(ts.textChangeRangeNewSpan(changeRange)), delta, oldText, newText, aggressiveChecks);
-            // Now that we've set up our internal incremental state just proceed and parse the
-            // source file in the normal fashion.  When possible the parser will retrieve and
-            // reuse nodes from the old tree.
-            //
-            // Note: passing in 'true' for setNodeParents is very important.  When incrementally
-            // parsing, we will be reusing nodes from the old tree, and placing it into new
-            // parents.  If we don't set the parents now, we'll end up with an observably
-            // inconsistent tree.  Setting the parents on the new tree should be very fast.  We
-            // will immediately bail out of walking any subtrees when we can see that their parents
-            // are already correct.
-            var result = Parser.parseSourceFile(sourceFile.fileName, newText, sourceFile.languageVersion, syntaxCursor, /*setParentNodes*/ true, sourceFile.scriptKind);
-            return result;
+            ts.Debug.assert((ts.getCheckFlags(symbol) & 1 /* Instantiated */) === 0, "Should never get an instantiated symbol here.");
+            return (symbol.flags & meaning) || dontResolveAlias ? symbol : resolveAlias(symbol);
         }
-        IncrementalParser.updateSourceFile = updateSourceFile;
-        function moveElementEntirelyPastChangeRange(element, isArray, delta, oldText, newText, aggressiveChecks) {
-            if (isArray) {
-                visitArray(element);
+        function resolveExternalModuleName(location, moduleReferenceExpression) {
+            return resolveExternalModuleNameWorker(location, moduleReferenceExpression, ts.Diagnostics.Cannot_find_module_0);
+        }
+        function resolveExternalModuleNameWorker(location, moduleReferenceExpression, moduleNotFoundError, isForAugmentation) {
+            if (isForAugmentation === void 0) { isForAugmentation = false; }
+            if (moduleReferenceExpression.kind !== 9 /* StringLiteral */ && moduleReferenceExpression.kind !== 13 /* NoSubstitutionTemplateLiteral */) {
+                return;
             }
-            else {
-                visitNode(element);
+            var moduleReferenceLiteral = moduleReferenceExpression;
+            return resolveExternalModule(location, moduleReferenceLiteral.text, moduleNotFoundError, moduleReferenceLiteral, isForAugmentation);
+        }
+        function resolveExternalModule(location, moduleReference, moduleNotFoundError, errorNode, isForAugmentation) {
+            if (isForAugmentation === void 0) { isForAugmentation = false; }
+            // Module names are escaped in our symbol table.  However, string literal values aren't.
+            // Escape the name in the "require(...)" clause to ensure we find the right symbol.
+            var moduleName = ts.escapeIdentifier(moduleReference);
+            if (moduleName === undefined) {
+                return;
             }
-            return;
-            function visitNode(node) {
-                var text = "";
-                if (aggressiveChecks && shouldCheckNode(node)) {
-                    text = oldText.substring(node.pos, node.end);
+            if (ts.startsWith(moduleReference, "@types/")) {
+                var diag = ts.Diagnostics.Cannot_import_type_declaration_files_Consider_importing_0_instead_of_1;
+                var withoutAtTypePrefix = ts.removePrefix(moduleReference, "@types/");
+                error(errorNode, diag, withoutAtTypePrefix, moduleReference);
+            }
+            var ambientModule = tryFindAmbientModule(moduleName, /*withAugmentations*/ true);
+            if (ambientModule) {
+                return ambientModule;
+            }
+            var isRelative = ts.isExternalModuleNameRelative(moduleName);
+            var resolvedModule = ts.getResolvedModule(ts.getSourceFileOfNode(location), moduleReference);
+            var resolutionDiagnostic = resolvedModule && ts.getResolutionDiagnostic(compilerOptions, resolvedModule);
+            var sourceFile = resolvedModule && !resolutionDiagnostic && host.getSourceFile(resolvedModule.resolvedFileName);
+            if (sourceFile) {
+                if (sourceFile.symbol) {
+                    // merged symbol is module declaration symbol combined with all augmentations
+                    return getMergedSymbol(sourceFile.symbol);
                 }
-                // Ditch any existing LS children we may have created.  This way we can avoid
-                // moving them forward.
-                if (node._children) {
-                    node._children = undefined;
+                if (moduleNotFoundError) {
+                    // report errors only if it was requested
+                    error(errorNode, ts.Diagnostics.File_0_is_not_a_module, sourceFile.fileName);
                 }
-                node.pos += delta;
-                node.end += delta;
-                if (aggressiveChecks && shouldCheckNode(node)) {
-                    ts.Debug.assert(text === newText.substring(node.pos, node.end));
+                return undefined;
+            }
+            if (patternAmbientModules) {
+                var pattern = ts.findBestPatternMatch(patternAmbientModules, function (_) { return _.pattern; }, moduleName);
+                if (pattern) {
+                    return getMergedSymbol(pattern.symbol);
                 }
-                forEachChild(node, visitNode, visitArray);
-                if (node.jsDocComments) {
-                    for (var _i = 0, _a = node.jsDocComments; _i < _a.length; _i++) {
-                        var jsDocComment = _a[_i];
-                        forEachChild(jsDocComment, visitNode, visitArray);
-                    }
+            }
+            // May be an untyped module. If so, ignore resolutionDiagnostic.
+            if (!isRelative && resolvedModule && !ts.extensionIsTypeScript(resolvedModule.extension)) {
+                if (isForAugmentation) {
+                    var diag = ts.Diagnostics.Invalid_module_name_in_augmentation_Module_0_resolves_to_an_untyped_module_at_1_which_cannot_be_augmented;
+                    error(errorNode, diag, moduleReference, resolvedModule.resolvedFileName);
                 }
-                checkNodePositions(node, aggressiveChecks);
+                else if (noImplicitAny && moduleNotFoundError) {
+                    var errorInfo = ts.chainDiagnosticMessages(/*details*/ undefined, ts.Diagnostics.Try_npm_install_types_Slash_0_if_it_exists_or_add_a_new_declaration_d_ts_file_containing_declare_module_0, moduleReference);
+                    errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.Could_not_find_a_declaration_file_for_module_0_1_implicitly_has_an_any_type, moduleReference, resolvedModule.resolvedFileName);
+                    diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(errorNode, errorInfo));
+                }
+                // Failed imports and untyped modules are both treated in an untyped manner; only difference is whether we give a diagnostic first.
+                return undefined;
             }
-            function visitArray(array) {
-                array._children = undefined;
-                array.pos += delta;
-                array.end += delta;
-                for (var _i = 0, array_8 = array; _i < array_8.length; _i++) {
-                    var node = array_8[_i];
-                    visitNode(node);
+            if (moduleNotFoundError) {
+                // report errors only if it was requested
+                if (resolutionDiagnostic) {
+                    error(errorNode, resolutionDiagnostic, moduleName, resolvedModule.resolvedFileName);
+                }
+                else {
+                    var tsExtension = ts.tryExtractTypeScriptExtension(moduleName);
+                    if (tsExtension) {
+                        var diag = ts.Diagnostics.An_import_path_cannot_end_with_a_0_extension_Consider_importing_1_instead;
+                        error(errorNode, diag, tsExtension, ts.removeExtension(moduleName, tsExtension));
+                    }
+                    else {
+                        error(errorNode, moduleNotFoundError, moduleName);
+                    }
                 }
             }
+            return undefined;
         }
-        function shouldCheckNode(node) {
-            switch (node.kind) {
-                case 9 /* StringLiteral */:
-                case 8 /* NumericLiteral */:
-                case 69 /* Identifier */:
-                    return true;
-            }
-            return false;
+        // An external module with an 'export =' declaration resolves to the target of the 'export =' declaration,
+        // and an external module with no 'export =' declaration resolves to the module itself.
+        function resolveExternalModuleSymbol(moduleSymbol, dontResolveAlias) {
+            return moduleSymbol && getMergedSymbol(resolveSymbol(moduleSymbol.exports.get("export="), dontResolveAlias)) || moduleSymbol;
         }
-        function adjustIntersectingElement(element, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta) {
-            ts.Debug.assert(element.end >= changeStart, "Adjusting an element that was entirely before the change range");
-            ts.Debug.assert(element.pos <= changeRangeOldEnd, "Adjusting an element that was entirely after the change range");
-            ts.Debug.assert(element.pos <= element.end);
-            // We have an element that intersects the change range in some way.  It may have its
-            // start, or its end (or both) in the changed range.  We want to adjust any part
-            // that intersects such that the final tree is in a consistent state.  i.e. all
-            // children have spans within the span of their parent, and all siblings are ordered
-            // properly.
-            // We may need to update both the 'pos' and the 'end' of the element.
-            // If the 'pos' is before the start of the change, then we don't need to touch it.
-            // If it isn't, then the 'pos' must be inside the change.  How we update it will
-            // depend if delta is  positive or negative.  If delta is positive then we have
-            // something like:
-            //
-            //  -------------------AAA-----------------
-            //  -------------------BBBCCCCCCC-----------------
-            //
-            // In this case, we consider any node that started in the change range to still be
-            // starting at the same position.
-            //
-            // however, if the delta is negative, then we instead have something like this:
-            //
-            //  -------------------XXXYYYYYYY-----------------
-            //  -------------------ZZZ-----------------
-            //
-            // In this case, any element that started in the 'X' range will keep its position.
-            // However any element that started after that will have their pos adjusted to be
-            // at the end of the new range.  i.e. any node that started in the 'Y' range will
-            // be adjusted to have their start at the end of the 'Z' range.
-            //
-            // The element will keep its position if possible.  Or Move backward to the new-end
-            // if it's in the 'Y' range.
-            element.pos = Math.min(element.pos, changeRangeNewEnd);
-            // If the 'end' is after the change range, then we always adjust it by the delta
-            // amount.  However, if the end is in the change range, then how we adjust it
-            // will depend on if delta is  positive or negative.  If delta is positive then we
-            // have something like:
-            //
-            //  -------------------AAA-----------------
-            //  -------------------BBBCCCCCCC-----------------
-            //
-            // In this case, we consider any node that ended inside the change range to keep its
-            // end position.
-            //
-            // however, if the delta is negative, then we instead have something like this:
-            //
-            //  -------------------XXXYYYYYYY-----------------
-            //  -------------------ZZZ-----------------
-            //
-            // In this case, any element that ended in the 'X' range will keep its position.
-            // However any element that ended after that will have their pos adjusted to be
-            // at the end of the new range.  i.e. any node that ended in the 'Y' range will
-            // be adjusted to have their end at the end of the 'Z' range.
-            if (element.end >= changeRangeOldEnd) {
-                // Element ends after the change range.  Always adjust the end pos.
-                element.end += delta;
-            }
-            else {
-                // Element ends in the change range.  The element will keep its position if
-                // possible. Or Move backward to the new-end if it's in the 'Y' range.
-                element.end = Math.min(element.end, changeRangeNewEnd);
+        // An external module with an 'export =' declaration may be referenced as an ES6 module provided the 'export ='
+        // references a symbol that is at least declared as a module or a variable. The target of the 'export =' may
+        // combine other declarations with the module or variable (e.g. a class/module, function/module, interface/variable).
+        function resolveESModuleSymbol(moduleSymbol, moduleReferenceExpression, dontResolveAlias) {
+            var symbol = resolveExternalModuleSymbol(moduleSymbol, dontResolveAlias);
+            if (!dontResolveAlias && symbol && !(symbol.flags & (1536 /* Module */ | 3 /* Variable */))) {
+                error(moduleReferenceExpression, ts.Diagnostics.Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct, symbolToString(moduleSymbol));
             }
-            ts.Debug.assert(element.pos <= element.end);
-            if (element.parent) {
-                ts.Debug.assert(element.pos >= element.parent.pos);
-                ts.Debug.assert(element.end <= element.parent.end);
+            return symbol;
+        }
+        function hasExportAssignmentSymbol(moduleSymbol) {
+            return moduleSymbol.exports.get("export=") !== undefined;
+        }
+        function getExportsOfModuleAsArray(moduleSymbol) {
+            return symbolsToArray(getExportsOfModule(moduleSymbol));
+        }
+        function getExportsAndPropertiesOfModule(moduleSymbol) {
+            var exports = getExportsOfModuleAsArray(moduleSymbol);
+            var exportEquals = resolveExternalModuleSymbol(moduleSymbol);
+            if (exportEquals !== moduleSymbol) {
+                ts.addRange(exports, getPropertiesOfType(getTypeOfSymbol(exportEquals)));
             }
+            return exports;
         }
-        function checkNodePositions(node, aggressiveChecks) {
-            if (aggressiveChecks) {
-                var pos_2 = node.pos;
-                forEachChild(node, function (child) {
-                    ts.Debug.assert(child.pos >= pos_2);
-                    pos_2 = child.end;
-                });
-                ts.Debug.assert(pos_2 <= node.end);
+        function tryGetMemberInModuleExports(memberName, moduleSymbol) {
+            var symbolTable = getExportsOfModule(moduleSymbol);
+            if (symbolTable) {
+                return symbolTable.get(memberName);
             }
         }
-        function updateTokenPositionsAndMarkElements(sourceFile, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta, oldText, newText, aggressiveChecks) {
-            visitNode(sourceFile);
-            return;
-            function visitNode(child) {
-                ts.Debug.assert(child.pos <= child.end);
-                if (child.pos > changeRangeOldEnd) {
-                    // Node is entirely past the change range.  We need to move both its pos and
-                    // end, forward or backward appropriately.
-                    moveElementEntirelyPastChangeRange(child, /*isArray*/ false, delta, oldText, newText, aggressiveChecks);
+        function getExportsOfSymbol(symbol) {
+            return symbol.flags & 1536 /* Module */ ? getExportsOfModule(symbol) : symbol.exports || emptySymbols;
+        }
+        function getExportsOfModule(moduleSymbol) {
+            var links = getSymbolLinks(moduleSymbol);
+            return links.resolvedExports || (links.resolvedExports = getExportsForModule(moduleSymbol));
+        }
+        /**
+         * Extends one symbol table with another while collecting information on name collisions for error message generation into the `lookupTable` argument
+         * Not passing `lookupTable` and `exportNode` disables this collection, and just extends the tables
+         */
+        function extendExportSymbols(target, source, lookupTable, exportNode) {
+            source && source.forEach(function (sourceSymbol, id) {
+                if (id === "default")
                     return;
+                var targetSymbol = target.get(id);
+                if (!targetSymbol) {
+                    target.set(id, sourceSymbol);
+                    if (lookupTable && exportNode) {
+                        lookupTable.set(id, {
+                            specifierText: ts.getTextOfNode(exportNode.moduleSpecifier)
+                        });
+                    }
                 }
-                // Check if the element intersects the change range.  If it does, then it is not
-                // reusable.  Also, we'll need to recurse to see what constituent portions we may
-                // be able to use.
-                var fullEnd = child.end;
-                if (fullEnd >= changeStart) {
-                    child.intersectsChange = true;
-                    child._children = undefined;
-                    // Adjust the pos or end (or both) of the intersecting element accordingly.
-                    adjustIntersectingElement(child, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta);
-                    forEachChild(child, visitNode, visitArray);
-                    checkNodePositions(child, aggressiveChecks);
-                    return;
+                else if (lookupTable && exportNode && targetSymbol && resolveSymbol(targetSymbol) !== resolveSymbol(sourceSymbol)) {
+                    var collisionTracker = lookupTable.get(id);
+                    if (!collisionTracker.exportsWithDuplicate) {
+                        collisionTracker.exportsWithDuplicate = [exportNode];
+                    }
+                    else {
+                        collisionTracker.exportsWithDuplicate.push(exportNode);
+                    }
                 }
-                // Otherwise, the node is entirely before the change range.  No need to do anything with it.
-                ts.Debug.assert(fullEnd < changeStart);
-            }
-            function visitArray(array) {
-                ts.Debug.assert(array.pos <= array.end);
-                if (array.pos > changeRangeOldEnd) {
-                    // Array is entirely after the change range.  We need to move it, and move any of
-                    // its children.
-                    moveElementEntirelyPastChangeRange(array, /*isArray*/ true, delta, oldText, newText, aggressiveChecks);
+            });
+        }
+        function getExportsForModule(moduleSymbol) {
+            var visitedSymbols = [];
+            // A module defined by an 'export=' consists on one export that needs to be resolved
+            moduleSymbol = resolveExternalModuleSymbol(moduleSymbol);
+            return visit(moduleSymbol) || moduleSymbol.exports;
+            // The ES6 spec permits export * declarations in a module to circularly reference the module itself. For example,
+            // module 'a' can 'export * from "b"' and 'b' can 'export * from "a"' without error.
+            function visit(symbol) {
+                if (!(symbol && symbol.flags & 1952 /* HasExports */ && !ts.contains(visitedSymbols, symbol))) {
                     return;
                 }
-                // Check if the element intersects the change range.  If it does, then it is not
-                // reusable.  Also, we'll need to recurse to see what constituent portions we may
-                // be able to use.
-                var fullEnd = array.end;
-                if (fullEnd >= changeStart) {
-                    array.intersectsChange = true;
-                    array._children = undefined;
-                    // Adjust the pos or end (or both) of the intersecting array accordingly.
-                    adjustIntersectingElement(array, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta);
-                    for (var _i = 0, array_9 = array; _i < array_9.length; _i++) {
-                        var node = array_9[_i];
-                        visitNode(node);
+                visitedSymbols.push(symbol);
+                var symbols = ts.cloneMap(symbol.exports);
+                // All export * declarations are collected in an __export symbol by the binder
+                var exportStars = symbol.exports.get("__export");
+                if (exportStars) {
+                    var nestedSymbols = ts.createMap();
+                    var lookupTable_1 = ts.createMap();
+                    for (var _i = 0, _a = exportStars.declarations; _i < _a.length; _i++) {
+                        var node = _a[_i];
+                        var resolvedModule = resolveExternalModuleName(node, node.moduleSpecifier);
+                        var exportedSymbols = visit(resolvedModule);
+                        extendExportSymbols(nestedSymbols, exportedSymbols, lookupTable_1, node);
                     }
-                    return;
+                    lookupTable_1.forEach(function (_a, id) {
+                        var exportsWithDuplicate = _a.exportsWithDuplicate;
+                        // It's not an error if the file with multiple `export *`s with duplicate names exports a member with that name itself
+                        if (id === "export=" || !(exportsWithDuplicate && exportsWithDuplicate.length) || symbols.has(id)) {
+                            return;
+                        }
+                        for (var _i = 0, exportsWithDuplicate_1 = exportsWithDuplicate; _i < exportsWithDuplicate_1.length; _i++) {
+                            var node = exportsWithDuplicate_1[_i];
+                            diagnostics.add(ts.createDiagnosticForNode(node, ts.Diagnostics.Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambiguity, lookupTable_1.get(id).specifierText, id));
+                        }
+                    });
+                    extendExportSymbols(symbols, nestedSymbols);
                 }
-                // Otherwise, the array is entirely before the change range.  No need to do anything with it.
-                ts.Debug.assert(fullEnd < changeStart);
+                return symbols;
             }
         }
-        function extendToAffectedRange(sourceFile, changeRange) {
-            // Consider the following code:
-            //      void foo() { /; }
-            //
-            // If the text changes with an insertion of / just before the semicolon then we end up with:
-            //      void foo() { //; }
-            //
-            // If we were to just use the changeRange a is, then we would not rescan the { token
-            // (as it does not intersect the actual original change range).  Because an edit may
-            // change the token touching it, we actually need to look back *at least* one token so
-            // that the prior token sees that change.
-            var maxLookahead = 1;
-            var start = changeRange.span.start;
-            // the first iteration aligns us with the change start. subsequent iteration move us to
-            // the left by maxLookahead tokens.  We only need to do this as long as we're not at the
-            // start of the tree.
-            for (var i = 0; start > 0 && i <= maxLookahead; i++) {
-                var nearestNode = findNearestNodeStartingBeforeOrAtPosition(sourceFile, start);
-                ts.Debug.assert(nearestNode.pos <= start);
-                var position = nearestNode.pos;
-                start = Math.max(0, position - 1);
+        function getMergedSymbol(symbol) {
+            var merged;
+            return symbol && symbol.mergeId && (merged = mergedSymbols[symbol.mergeId]) ? merged : symbol;
+        }
+        function getSymbolOfNode(node) {
+            return getMergedSymbol(node.symbol);
+        }
+        function getParentOfSymbol(symbol) {
+            return getMergedSymbol(symbol.parent);
+        }
+        function getExportSymbolOfValueSymbolIfExported(symbol) {
+            return symbol && (symbol.flags & 1048576 /* ExportValue */) !== 0
+                ? getMergedSymbol(symbol.exportSymbol)
+                : symbol;
+        }
+        function symbolIsValue(symbol) {
+            return !!(symbol.flags & 107455 /* Value */ || symbol.flags & 8388608 /* Alias */ && resolveAlias(symbol).flags & 107455 /* Value */);
+        }
+        function findConstructorDeclaration(node) {
+            var members = node.members;
+            for (var _i = 0, members_2 = members; _i < members_2.length; _i++) {
+                var member = members_2[_i];
+                if (member.kind === 152 /* Constructor */ && ts.nodeIsPresent(member.body)) {
+                    return member;
+                }
             }
-            var finalSpan = ts.createTextSpanFromBounds(start, ts.textSpanEnd(changeRange.span));
-            var finalLength = changeRange.newLength + (changeRange.span.start - start);
-            return ts.createTextChangeRange(finalSpan, finalLength);
         }
-        function findNearestNodeStartingBeforeOrAtPosition(sourceFile, position) {
-            var bestResult = sourceFile;
-            var lastNodeEntirelyBeforePosition;
-            forEachChild(sourceFile, visit);
-            if (lastNodeEntirelyBeforePosition) {
-                var lastChildOfLastEntireNodeBeforePosition = getLastChild(lastNodeEntirelyBeforePosition);
-                if (lastChildOfLastEntireNodeBeforePosition.pos > bestResult.pos) {
-                    bestResult = lastChildOfLastEntireNodeBeforePosition;
+        function createType(flags) {
+            var result = new Type(checker, flags);
+            typeCount++;
+            result.id = typeCount;
+            return result;
+        }
+        function createIntrinsicType(kind, intrinsicName) {
+            var type = createType(kind);
+            type.intrinsicName = intrinsicName;
+            return type;
+        }
+        function createBooleanType(trueFalseTypes) {
+            var type = getUnionType(trueFalseTypes);
+            type.flags |= 8 /* Boolean */;
+            type.intrinsicName = "boolean";
+            return type;
+        }
+        function createObjectType(objectFlags, symbol) {
+            var type = createType(32768 /* Object */);
+            type.objectFlags = objectFlags;
+            type.symbol = symbol;
+            return type;
+        }
+        function createTypeofType() {
+            return getUnionType(ts.convertToArray(typeofEQFacts.keys(), getLiteralType));
+        }
+        // A reserved member name starts with two underscores, but the third character cannot be an underscore
+        // or the @ symbol. A third underscore indicates an escaped form of an identifer that started
+        // with at least two underscores. The @ character indicates that the name is denoted by a well known ES
+        // Symbol instance.
+        function isReservedMemberName(name) {
+            return name.charCodeAt(0) === 95 /* _ */ &&
+                name.charCodeAt(1) === 95 /* _ */ &&
+                name.charCodeAt(2) !== 95 /* _ */ &&
+                name.charCodeAt(2) !== 64 /* at */;
+        }
+        function getNamedMembers(members) {
+            var result;
+            members.forEach(function (symbol, id) {
+                if (!isReservedMemberName(id)) {
+                    if (!result)
+                        result = [];
+                    if (symbolIsValue(symbol)) {
+                        result.push(symbol);
+                    }
+                }
+            });
+            return result || emptyArray;
+        }
+        function setStructuredTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo) {
+            type.members = members;
+            type.properties = getNamedMembers(members);
+            type.callSignatures = callSignatures;
+            type.constructSignatures = constructSignatures;
+            if (stringIndexInfo)
+                type.stringIndexInfo = stringIndexInfo;
+            if (numberIndexInfo)
+                type.numberIndexInfo = numberIndexInfo;
+            return type;
+        }
+        function createAnonymousType(symbol, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo) {
+            return setStructuredTypeMembers(createObjectType(16 /* Anonymous */, symbol), members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+        }
+        function forEachSymbolTableInScope(enclosingDeclaration, callback) {
+            var result;
+            for (var location_1 = enclosingDeclaration; location_1; location_1 = location_1.parent) {
+                // Locals of a source file are not in scope (because they get merged into the global symbol table)
+                if (location_1.locals && !isGlobalSourceFile(location_1)) {
+                    if (result = callback(location_1.locals)) {
+                        return result;
+                    }
+                }
+                switch (location_1.kind) {
+                    case 265 /* SourceFile */:
+                        if (!ts.isExternalOrCommonJsModule(location_1)) {
+                            break;
+                        }
+                    // falls through
+                    case 233 /* ModuleDeclaration */:
+                        if (result = callback(getSymbolOfNode(location_1).exports)) {
+                            return result;
+                        }
+                        break;
                 }
             }
-            return bestResult;
-            function getLastChild(node) {
-                while (true) {
-                    var lastChild = getLastChildWorker(node);
-                    if (lastChild) {
-                        node = lastChild;
+            return callback(globals);
+        }
+        function getQualifiedLeftMeaning(rightMeaning) {
+            // If we are looking in value space, the parent meaning is value, other wise it is namespace
+            return rightMeaning === 107455 /* Value */ ? 107455 /* Value */ : 1920 /* Namespace */;
+        }
+        function getAccessibleSymbolChain(symbol, enclosingDeclaration, meaning, useOnlyExternalAliasing) {
+            function getAccessibleSymbolChainFromSymbolTable(symbols) {
+                return getAccessibleSymbolChainFromSymbolTableWorker(symbols, []);
+            }
+            function getAccessibleSymbolChainFromSymbolTableWorker(symbols, visitedSymbolTables) {
+                if (ts.contains(visitedSymbolTables, symbols)) {
+                    return undefined;
+                }
+                visitedSymbolTables.push(symbols);
+                var result = trySymbolTable(symbols);
+                visitedSymbolTables.pop();
+                return result;
+                function canQualifySymbol(symbolFromSymbolTable, meaning) {
+                    // If the symbol is equivalent and doesn't need further qualification, this symbol is accessible
+                    if (!needsQualification(symbolFromSymbolTable, enclosingDeclaration, meaning)) {
+                        return true;
                     }
-                    else {
-                        return node;
+                    // If symbol needs qualification, make sure that parent is accessible, if it is then this symbol is accessible too
+                    var accessibleParent = getAccessibleSymbolChain(symbolFromSymbolTable.parent, enclosingDeclaration, getQualifiedLeftMeaning(meaning), useOnlyExternalAliasing);
+                    return !!accessibleParent;
+                }
+                function isAccessible(symbolFromSymbolTable, resolvedAliasSymbol) {
+                    if (symbol === (resolvedAliasSymbol || symbolFromSymbolTable)) {
+                        // if the symbolFromSymbolTable is not external module (it could be if it was determined as ambient external module and would be in globals table)
+                        // and if symbolFromSymbolTable or alias resolution matches the symbol,
+                        // check the symbol can be qualified, it is only then this symbol is accessible
+                        return !ts.forEach(symbolFromSymbolTable.declarations, hasExternalModuleSymbol) &&
+                            canQualifySymbol(symbolFromSymbolTable, meaning);
                     }
                 }
+                function trySymbolTable(symbols) {
+                    // If symbol is directly available by its name in the symbol table
+                    if (isAccessible(symbols.get(symbol.name))) {
+                        return [symbol];
+                    }
+                    // Check if symbol is any of the alias
+                    return ts.forEachEntry(symbols, function (symbolFromSymbolTable) {
+                        if (symbolFromSymbolTable.flags & 8388608 /* Alias */
+                            && symbolFromSymbolTable.name !== "export="
+                            && !ts.getDeclarationOfKind(symbolFromSymbolTable, 246 /* ExportSpecifier */)) {
+                            if (!useOnlyExternalAliasing ||
+                                // Is this external alias, then use it to name
+                                ts.forEach(symbolFromSymbolTable.declarations, ts.isExternalModuleImportEqualsDeclaration)) {
+                                var resolvedImportedSymbol = resolveAlias(symbolFromSymbolTable);
+                                if (isAccessible(symbolFromSymbolTable, resolvedImportedSymbol)) {
+                                    return [symbolFromSymbolTable];
+                                }
+                                // Look in the exported members, if we can find accessibleSymbolChain, symbol is accessible using this chain
+                                // but only if the symbolFromSymbolTable can be qualified
+                                var accessibleSymbolsFromExports = resolvedImportedSymbol.exports ? getAccessibleSymbolChainFromSymbolTableWorker(resolvedImportedSymbol.exports, visitedSymbolTables) : undefined;
+                                if (accessibleSymbolsFromExports && canQualifySymbol(symbolFromSymbolTable, getQualifiedLeftMeaning(meaning))) {
+                                    return [symbolFromSymbolTable].concat(accessibleSymbolsFromExports);
+                                }
+                            }
+                        }
+                    });
+                }
             }
-            function getLastChildWorker(node) {
-                var last = undefined;
-                forEachChild(node, function (child) {
-                    if (ts.nodeIsPresent(child)) {
-                        last = child;
-                    }
-                });
-                return last;
+            if (symbol) {
+                if (!(isPropertyOrMethodDeclarationSymbol(symbol))) {
+                    return forEachSymbolTableInScope(enclosingDeclaration, getAccessibleSymbolChainFromSymbolTable);
+                }
             }
-            function visit(child) {
-                if (ts.nodeIsMissing(child)) {
-                    // Missing nodes are effectively invisible to us.  We never even consider them
-                    // When trying to find the nearest node before us.
-                    return;
+        }
+        function needsQualification(symbol, enclosingDeclaration, meaning) {
+            var qualify = false;
+            forEachSymbolTableInScope(enclosingDeclaration, function (symbolTable) {
+                // If symbol of this name is not available in the symbol table we are ok
+                var symbolFromSymbolTable = symbolTable.get(symbol.name);
+                if (!symbolFromSymbolTable) {
+                    // Continue to the next symbol table
+                    return false;
                 }
-                // If the child intersects this position, then this node is currently the nearest
-                // node that starts before the position.
-                if (child.pos <= position) {
-                    if (child.pos >= bestResult.pos) {
-                        // This node starts before the position, and is closer to the position than
-                        // the previous best node we found.  It is now the new best node.
-                        bestResult = child;
-                    }
-                    // Now, the node may overlap the position, or it may end entirely before the
-                    // position.  If it overlaps with the position, then either it, or one of its
-                    // children must be the nearest node before the position.  So we can just
-                    // recurse into this child to see if we can find something better.
-                    if (position < child.end) {
-                        // The nearest node is either this child, or one of the children inside
-                        // of it.  We've already marked this child as the best so far.  Recurse
-                        // in case one of the children is better.
-                        forEachChild(child, visit);
-                        // Once we look at the children of this node, then there's no need to
-                        // continue any further.
-                        return true;
-                    }
-                    else {
-                        ts.Debug.assert(child.end <= position);
-                        // The child ends entirely before this position.  Say you have the following
-                        // (where $ is the position)
-                        //
-                        //      <complex expr 1> ? <complex expr 2> $ : <...> <...>
-                        //
-                        // We would want to find the nearest preceding node in "complex expr 2".
-                        // To support that, we keep track of this node, and once we're done searching
-                        // for a best node, we recurse down this node to see if we can find a good
-                        // result in it.
-                        //
-                        // This approach allows us to quickly skip over nodes that are entirely
-                        // before the position, while still allowing us to find any nodes in the
-                        // last one that might be what we want.
-                        lastNodeEntirelyBeforePosition = child;
-                    }
+                // If the symbol with this name is present it should refer to the symbol
+                if (symbolFromSymbolTable === symbol) {
+                    // No need to qualify
+                    return true;
                 }
-                else {
-                    ts.Debug.assert(child.pos > position);
-                    // We're now at a node that is entirely past the position we're searching for.
-                    // This node (and all following nodes) could never contribute to the result,
-                    // so just skip them by returning 'true' here.
+                // Qualify if the symbol from symbol table has same meaning as expected
+                symbolFromSymbolTable = (symbolFromSymbolTable.flags & 8388608 /* Alias */ && !ts.getDeclarationOfKind(symbolFromSymbolTable, 246 /* ExportSpecifier */)) ? resolveAlias(symbolFromSymbolTable) : symbolFromSymbolTable;
+                if (symbolFromSymbolTable.flags & meaning) {
+                    qualify = true;
                     return true;
                 }
-            }
+                // Continue to the next symbol table
+                return false;
+            });
+            return qualify;
         }
-        function checkChangeRange(sourceFile, newText, textChangeRange, aggressiveChecks) {
-            var oldText = sourceFile.text;
-            if (textChangeRange) {
-                ts.Debug.assert((oldText.length - textChangeRange.span.length + textChangeRange.newLength) === newText.length);
-                if (aggressiveChecks || ts.Debug.shouldAssert(3 /* VeryAggressive */)) {
-                    var oldTextPrefix = oldText.substr(0, textChangeRange.span.start);
-                    var newTextPrefix = newText.substr(0, textChangeRange.span.start);
-                    ts.Debug.assert(oldTextPrefix === newTextPrefix);
-                    var oldTextSuffix = oldText.substring(ts.textSpanEnd(textChangeRange.span), oldText.length);
-                    var newTextSuffix = newText.substring(ts.textSpanEnd(ts.textChangeRangeNewSpan(textChangeRange)), newText.length);
-                    ts.Debug.assert(oldTextSuffix === newTextSuffix);
+        function isPropertyOrMethodDeclarationSymbol(symbol) {
+            if (symbol.declarations && symbol.declarations.length) {
+                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                    var declaration = _a[_i];
+                    switch (declaration.kind) {
+                        case 149 /* PropertyDeclaration */:
+                        case 151 /* MethodDeclaration */:
+                        case 153 /* GetAccessor */:
+                        case 154 /* SetAccessor */:
+                            continue;
+                        default:
+                            return false;
+                    }
                 }
+                return true;
             }
+            return false;
         }
-        function createSyntaxCursor(sourceFile) {
-            var currentArray = sourceFile.statements;
-            var currentArrayIndex = 0;
-            ts.Debug.assert(currentArrayIndex < currentArray.length);
-            var current = currentArray[currentArrayIndex];
-            var lastQueriedPosition = -1 /* Value */;
-            return {
-                currentNode: function (position) {
-                    // Only compute the current node if the position is different than the last time
-                    // we were asked.  The parser commonly asks for the node at the same position
-                    // twice.  Once to know if can read an appropriate list element at a certain point,
-                    // and then to actually read and consume the node.
-                    if (position !== lastQueriedPosition) {
-                        // Much of the time the parser will need the very next node in the array that
-                        // we just returned a node from.So just simply check for that case and move
-                        // forward in the array instead of searching for the node again.
-                        if (current && current.end === position && currentArrayIndex < (currentArray.length - 1)) {
-                            currentArrayIndex++;
-                            current = currentArray[currentArrayIndex];
-                        }
-                        // If we don't have a node, or the node we have isn't in the right position,
-                        // then try to find a viable node at the position requested.
-                        if (!current || current.pos !== position) {
-                            findHighestListElementThatStartsAtPosition(position);
+        /**
+         * Check if the given symbol in given enclosing declaration is accessible and mark all associated alias to be visible if requested
+         *
+         * @param symbol a Symbol to check if accessible
+         * @param enclosingDeclaration a Node containing reference to the symbol
+         * @param meaning a SymbolFlags to check if such meaning of the symbol is accessible
+         * @param shouldComputeAliasToMakeVisible a boolean value to indicate whether to return aliases to be mark visible in case the symbol is accessible
+         */
+        function isSymbolAccessible(symbol, enclosingDeclaration, meaning, shouldComputeAliasesToMakeVisible) {
+            if (symbol && enclosingDeclaration && !(symbol.flags & 262144 /* TypeParameter */)) {
+                var initialSymbol = symbol;
+                var meaningToLook = meaning;
+                while (symbol) {
+                    // Symbol is accessible if it by itself is accessible
+                    var accessibleSymbolChain = getAccessibleSymbolChain(symbol, enclosingDeclaration, meaningToLook, /*useOnlyExternalAliasing*/ false);
+                    if (accessibleSymbolChain) {
+                        var hasAccessibleDeclarations = hasVisibleDeclarations(accessibleSymbolChain[0], shouldComputeAliasesToMakeVisible);
+                        if (!hasAccessibleDeclarations) {
+                            return {
+                                accessibility: 1 /* NotAccessible */,
+                                errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning),
+                                errorModuleName: symbol !== initialSymbol ? symbolToString(symbol, enclosingDeclaration, 1920 /* Namespace */) : undefined,
+                            };
                         }
+                        return hasAccessibleDeclarations;
                     }
-                    // Cache this query so that we don't do any extra work if the parser calls back
-                    // into us.  Note: this is very common as the parser will make pairs of calls like
-                    // 'isListElement -> parseListElement'.  If we were unable to find a node when
-                    // called with 'isListElement', we don't want to redo the work when parseListElement
-                    // is called immediately after.
-                    lastQueriedPosition = position;
-                    // Either we don'd have a node, or we have a node at the position being asked for.
-                    ts.Debug.assert(!current || current.pos === position);
-                    return current;
+                    // If we haven't got the accessible symbol, it doesn't mean the symbol is actually inaccessible.
+                    // It could be a qualified symbol and hence verify the path
+                    // e.g.:
+                    // module m {
+                    //     export class c {
+                    //     }
+                    // }
+                    // const x: typeof m.c
+                    // In the above example when we start with checking if typeof m.c symbol is accessible,
+                    // we are going to see if c can be accessed in scope directly.
+                    // But it can't, hence the accessible is going to be undefined, but that doesn't mean m.c is inaccessible
+                    // It is accessible if the parent m is accessible because then m.c can be accessed through qualification
+                    meaningToLook = getQualifiedLeftMeaning(meaning);
+                    symbol = getParentOfSymbol(symbol);
                 }
-            };
-            // Finds the highest element in the tree we can find that starts at the provided position.
-            // The element must be a direct child of some node list in the tree.  This way after we
-            // return it, we can easily return its next sibling in the list.
-            function findHighestListElementThatStartsAtPosition(position) {
-                // Clear out any cached state about the last node we found.
-                currentArray = undefined;
-                currentArrayIndex = -1 /* Value */;
-                current = undefined;
-                // Recurse into the source file to find the highest node at this position.
-                forEachChild(sourceFile, visitNode, visitArray);
-                return;
-                function visitNode(node) {
-                    if (position >= node.pos && position < node.end) {
-                        // Position was within this node.  Keep searching deeper to find the node.
-                        forEachChild(node, visitNode, visitArray);
-                        // don't proceed any further in the search.
-                        return true;
+                // This could be a symbol that is not exported in the external module
+                // or it could be a symbol from different external module that is not aliased and hence cannot be named
+                var symbolExternalModule = ts.forEach(initialSymbol.declarations, getExternalModuleContainer);
+                if (symbolExternalModule) {
+                    var enclosingExternalModule = getExternalModuleContainer(enclosingDeclaration);
+                    if (symbolExternalModule !== enclosingExternalModule) {
+                        // name from different external module that is not visible
+                        return {
+                            accessibility: 2 /* CannotBeNamed */,
+                            errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning),
+                            errorModuleName: symbolToString(symbolExternalModule)
+                        };
                     }
-                    // position wasn't in this node, have to keep searching.
-                    return false;
                 }
-                function visitArray(array) {
-                    if (position >= array.pos && position < array.end) {
-                        // position was in this array.  Search through this array to see if we find a
-                        // viable element.
-                        for (var i = 0, n = array.length; i < n; i++) {
-                            var child = array[i];
-                            if (child) {
-                                if (child.pos === position) {
-                                    // Found the right node.  We're done.
-                                    currentArray = array;
-                                    currentArrayIndex = i;
-                                    current = child;
-                                    return true;
-                                }
-                                else {
-                                    if (child.pos < position && position < child.end) {
-                                        // Position in somewhere within this child.  Search in it and
-                                        // stop searching in this array.
-                                        forEachChild(child, visitNode, visitArray);
-                                        return true;
-                                    }
+                // Just a local name that is not accessible
+                return {
+                    accessibility: 1 /* NotAccessible */,
+                    errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning),
+                };
+            }
+            return { accessibility: 0 /* Accessible */ };
+            function getExternalModuleContainer(declaration) {
+                var node = ts.findAncestor(declaration, hasExternalModuleSymbol);
+                return node && getSymbolOfNode(node);
+            }
+        }
+        function hasExternalModuleSymbol(declaration) {
+            return ts.isAmbientModule(declaration) || (declaration.kind === 265 /* SourceFile */ && ts.isExternalOrCommonJsModule(declaration));
+        }
+        function hasVisibleDeclarations(symbol, shouldComputeAliasToMakeVisible) {
+            var aliasesToMakeVisible;
+            if (ts.forEach(symbol.declarations, function (declaration) { return !getIsDeclarationVisible(declaration); })) {
+                return undefined;
+            }
+            return { accessibility: 0 /* Accessible */, aliasesToMakeVisible: aliasesToMakeVisible };
+            function getIsDeclarationVisible(declaration) {
+                if (!isDeclarationVisible(declaration)) {
+                    // Mark the unexported alias as visible if its parent is visible
+                    // because these kind of aliases can be used to name types in declaration file
+                    var anyImportSyntax = getAnyImportSyntax(declaration);
+                    if (anyImportSyntax &&
+                        !(ts.getModifierFlags(anyImportSyntax) & 1 /* Export */) &&
+                        isDeclarationVisible(anyImportSyntax.parent)) {
+                        // In function "buildTypeDisplay" where we decide whether to write type-alias or serialize types,
+                        // we want to just check if type- alias is accessible or not but we don't care about emitting those alias at that time
+                        // since we will do the emitting later in trackSymbol.
+                        if (shouldComputeAliasToMakeVisible) {
+                            getNodeLinks(declaration).isVisible = true;
+                            if (aliasesToMakeVisible) {
+                                if (!ts.contains(aliasesToMakeVisible, anyImportSyntax)) {
+                                    aliasesToMakeVisible.push(anyImportSyntax);
                                 }
                             }
+                            else {
+                                aliasesToMakeVisible = [anyImportSyntax];
+                            }
                         }
+                        return true;
                     }
-                    // position wasn't in this array, have to keep searching.
+                    // Declaration is not visible
                     return false;
                 }
+                return true;
             }
         }
-        var InvalidPosition;
-        (function (InvalidPosition) {
-            InvalidPosition[InvalidPosition["Value"] = -1] = "Value";
-        })(InvalidPosition || (InvalidPosition = {}));
-    })(IncrementalParser || (IncrementalParser = {}));
-})(ts || (ts = {}));
-/// <reference path="utilities.ts"/>
-/// <reference path="parser.ts"/>
-/* @internal */
-var ts;
-(function (ts) {
-    (function (ModuleInstanceState) {
-        ModuleInstanceState[ModuleInstanceState["NonInstantiated"] = 0] = "NonInstantiated";
-        ModuleInstanceState[ModuleInstanceState["Instantiated"] = 1] = "Instantiated";
-        ModuleInstanceState[ModuleInstanceState["ConstEnumOnly"] = 2] = "ConstEnumOnly";
-    })(ts.ModuleInstanceState || (ts.ModuleInstanceState = {}));
-    var ModuleInstanceState = ts.ModuleInstanceState;
-    function getModuleInstanceState(node) {
-        // A module is uninstantiated if it contains only
-        // 1. interface declarations, type alias declarations
-        if (node.kind === 222 /* InterfaceDeclaration */ || node.kind === 223 /* TypeAliasDeclaration */) {
-            return 0 /* NonInstantiated */;
-        }
-        else if (ts.isConstEnumDeclaration(node)) {
-            return 2 /* ConstEnumOnly */;
-        }
-        else if ((node.kind === 230 /* ImportDeclaration */ || node.kind === 229 /* ImportEqualsDeclaration */) && !(ts.hasModifier(node, 1 /* Export */))) {
-            return 0 /* NonInstantiated */;
+        function isEntityNameVisible(entityName, enclosingDeclaration) {
+            // get symbol of the first identifier of the entityName
+            var meaning;
+            if (entityName.parent.kind === 162 /* TypeQuery */ || ts.isExpressionWithTypeArgumentsInClassExtendsClause(entityName.parent)) {
+                // Typeof value
+                meaning = 107455 /* Value */ | 1048576 /* ExportValue */;
+            }
+            else if (entityName.kind === 143 /* QualifiedName */ || entityName.kind === 179 /* PropertyAccessExpression */ ||
+                entityName.parent.kind === 237 /* ImportEqualsDeclaration */) {
+                // Left identifier from type reference or TypeAlias
+                // Entity name of the import declaration
+                meaning = 1920 /* Namespace */;
+            }
+            else {
+                // Type Reference or TypeAlias entity = Identifier
+                meaning = 793064 /* Type */;
+            }
+            var firstIdentifier = getFirstIdentifier(entityName);
+            var symbol = resolveName(enclosingDeclaration, firstIdentifier.text, meaning, /*nodeNotFoundErrorMessage*/ undefined, /*nameArg*/ undefined);
+            // Verify if the symbol is accessible
+            return (symbol && hasVisibleDeclarations(symbol, /*shouldComputeAliasToMakeVisible*/ true)) || {
+                accessibility: 1 /* NotAccessible */,
+                errorSymbolName: ts.getTextOfNode(firstIdentifier),
+                errorNode: firstIdentifier
+            };
         }
-        else if (node.kind === 226 /* ModuleBlock */) {
-            var state_1 = 0 /* NonInstantiated */;
-            ts.forEachChild(node, function (n) {
-                switch (getModuleInstanceState(n)) {
-                    case 0 /* NonInstantiated */:
-                        // child is non-instantiated - continue searching
-                        return false;
-                    case 2 /* ConstEnumOnly */:
-                        // child is const enum only - record state and continue searching
-                        state_1 = 2 /* ConstEnumOnly */;
-                        return false;
-                    case 1 /* Instantiated */:
-                        // child is instantiated - record state and stop
-                        state_1 = 1 /* Instantiated */;
-                        return true;
-                }
-            });
-            return state_1;
+        function writeKeyword(writer, kind) {
+            writer.writeKeyword(ts.tokenToString(kind));
         }
-        else if (node.kind === 225 /* ModuleDeclaration */) {
-            var body = node.body;
-            return body ? getModuleInstanceState(body) : 1 /* Instantiated */;
+        function writePunctuation(writer, kind) {
+            writer.writePunctuation(ts.tokenToString(kind));
         }
-        else {
-            return 1 /* Instantiated */;
+        function writeSpace(writer) {
+            writer.writeSpace(" ");
         }
-    }
-    ts.getModuleInstanceState = getModuleInstanceState;
-    var ContainerFlags;
-    (function (ContainerFlags) {
-        // The current node is not a container, and no container manipulation should happen before
-        // recursing into it.
-        ContainerFlags[ContainerFlags["None"] = 0] = "None";
-        // The current node is a container.  It should be set as the current container (and block-
-        // container) before recursing into it.  The current node does not have locals.  Examples:
-        //
-        //      Classes, ObjectLiterals, TypeLiterals, Interfaces...
-        ContainerFlags[ContainerFlags["IsContainer"] = 1] = "IsContainer";
-        // The current node is a block-scoped-container.  It should be set as the current block-
-        // container before recursing into it.  Examples:
-        //
-        //      Blocks (when not parented by functions), Catch clauses, For/For-in/For-of statements...
-        ContainerFlags[ContainerFlags["IsBlockScopedContainer"] = 2] = "IsBlockScopedContainer";
-        // The current node is the container of a control flow path. The current control flow should
-        // be saved and restored, and a new control flow initialized within the container.
-        ContainerFlags[ContainerFlags["IsControlFlowContainer"] = 4] = "IsControlFlowContainer";
-        ContainerFlags[ContainerFlags["IsFunctionLike"] = 8] = "IsFunctionLike";
-        ContainerFlags[ContainerFlags["IsFunctionExpression"] = 16] = "IsFunctionExpression";
-        ContainerFlags[ContainerFlags["HasLocals"] = 32] = "HasLocals";
-        ContainerFlags[ContainerFlags["IsInterface"] = 64] = "IsInterface";
-    })(ContainerFlags || (ContainerFlags = {}));
-    var binder = createBinder();
-    function bindSourceFile(file, options) {
-        ts.performance.mark("beforeBind");
-        binder(file, options);
-        ts.performance.mark("afterBind");
-        ts.performance.measure("Bind", "beforeBind", "afterBind");
-    }
-    ts.bindSourceFile = bindSourceFile;
-    function createBinder() {
-        var file;
-        var options;
-        var languageVersion;
-        var parent;
-        var container;
-        var blockScopeContainer;
-        var lastContainer;
-        var seenThisKeyword;
-        // state used by control flow analysis
-        var currentFlow;
-        var currentBreakTarget;
-        var currentContinueTarget;
-        var currentReturnTarget;
-        var currentTrueTarget;
-        var currentFalseTarget;
-        var preSwitchCaseFlow;
-        var activeLabels;
-        var hasExplicitReturn;
-        // state used for emit helpers
-        var emitFlags;
-        // If this file is an external module, then it is automatically in strict-mode according to
-        // ES6.  If it is not an external module, then we'll determine if it is in strict mode or
-        // not depending on if we see "use strict" in certain places (or if we hit a class/namespace).
-        var inStrictMode;
-        var symbolCount = 0;
-        var Symbol;
-        var classifiableNames;
-        var unreachableFlow = { flags: 1 /* Unreachable */ };
-        var reportedUnreachableFlow = { flags: 1 /* Unreachable */ };
-        // state used to aggregate transform flags during bind.
-        var subtreeTransformFlags = 0 /* None */;
-        var skipTransformFlagAggregation;
-        function bindSourceFile(f, opts) {
-            file = f;
-            options = opts;
-            languageVersion = ts.getEmitScriptTarget(options);
-            inStrictMode = !!file.externalModuleIndicator;
-            classifiableNames = ts.createMap();
-            symbolCount = 0;
-            skipTransformFlagAggregation = ts.isDeclarationFile(file);
-            Symbol = ts.objectAllocator.getSymbolConstructor();
-            if (!file.locals) {
-                bind(file);
-                file.symbolCount = symbolCount;
-                file.classifiableNames = classifiableNames;
-            }
-            file = undefined;
-            options = undefined;
-            languageVersion = undefined;
-            parent = undefined;
-            container = undefined;
-            blockScopeContainer = undefined;
-            lastContainer = undefined;
-            seenThisKeyword = false;
-            currentFlow = undefined;
-            currentBreakTarget = undefined;
-            currentContinueTarget = undefined;
-            currentReturnTarget = undefined;
-            currentTrueTarget = undefined;
-            currentFalseTarget = undefined;
-            activeLabels = undefined;
-            hasExplicitReturn = false;
-            emitFlags = 0 /* None */;
-            subtreeTransformFlags = 0 /* None */;
+        function symbolToString(symbol, enclosingDeclaration, meaning) {
+            var writer = ts.getSingleLineStringWriter();
+            getSymbolDisplayBuilder().buildSymbolDisplay(symbol, writer, enclosingDeclaration, meaning);
+            var result = writer.string();
+            ts.releaseStringWriter(writer);
+            return result;
         }
-        return bindSourceFile;
-        function createSymbol(flags, name) {
-            symbolCount++;
-            return new Symbol(flags, name);
+        function signatureToString(signature, enclosingDeclaration, flags, kind) {
+            var writer = ts.getSingleLineStringWriter();
+            getSymbolDisplayBuilder().buildSignatureDisplay(signature, writer, enclosingDeclaration, flags, kind);
+            var result = writer.string();
+            ts.releaseStringWriter(writer);
+            return result;
         }
-        function addDeclarationToSymbol(symbol, node, symbolFlags) {
-            symbol.flags |= symbolFlags;
-            node.symbol = symbol;
-            if (!symbol.declarations) {
-                symbol.declarations = [];
-            }
-            symbol.declarations.push(node);
-            if (symbolFlags & 1952 /* HasExports */ && !symbol.exports) {
-                symbol.exports = ts.createMap();
+        function typeToString(type, enclosingDeclaration, flags) {
+            var typeNode = nodeBuilder.typeToTypeNode(type, enclosingDeclaration, toNodeBuilderFlags(flags) | ts.NodeBuilderFlags.IgnoreErrors | ts.NodeBuilderFlags.WriteTypeParametersInQualifiedName);
+            ts.Debug.assert(typeNode !== undefined, "should always get typenode");
+            var options = { removeComments: true };
+            var writer = ts.createTextWriter("");
+            var printer = ts.createPrinter(options);
+            var sourceFile = enclosingDeclaration && ts.getSourceFileOfNode(enclosingDeclaration);
+            printer.writeNode(3 /* Unspecified */, typeNode, /*sourceFile*/ sourceFile, writer);
+            var result = writer.getText();
+            var maxLength = compilerOptions.noErrorTruncation || flags & 8 /* NoTruncation */ ? undefined : 100;
+            if (maxLength && result.length >= maxLength) {
+                return result.substr(0, maxLength - "...".length) + "...";
             }
-            if (symbolFlags & 6240 /* HasMembers */ && !symbol.members) {
-                symbol.members = ts.createMap();
+            return result;
+            function toNodeBuilderFlags(flags) {
+                var result = ts.NodeBuilderFlags.None;
+                if (!flags) {
+                    return result;
+                }
+                if (flags & 8 /* NoTruncation */) {
+                    result |= ts.NodeBuilderFlags.NoTruncation;
+                }
+                if (flags & 256 /* UseFullyQualifiedType */) {
+                    result |= ts.NodeBuilderFlags.UseFullyQualifiedType;
+                }
+                if (flags & 4096 /* SuppressAnyReturnType */) {
+                    result |= ts.NodeBuilderFlags.SuppressAnyReturnType;
+                }
+                if (flags & 1 /* WriteArrayAsGenericType */) {
+                    result |= ts.NodeBuilderFlags.WriteArrayAsGenericType;
+                }
+                if (flags & 64 /* WriteTypeArgumentsOfSignature */) {
+                    result |= ts.NodeBuilderFlags.WriteTypeArgumentsOfSignature;
+                }
+                return result;
             }
-            if (symbolFlags & 107455 /* Value */) {
-                var valueDeclaration = symbol.valueDeclaration;
-                if (!valueDeclaration ||
-                    (valueDeclaration.kind !== node.kind && valueDeclaration.kind === 225 /* ModuleDeclaration */)) {
-                    // other kinds of value declarations take precedence over modules
-                    symbol.valueDeclaration = node;
+        }
+        function createNodeBuilder() {
+            return {
+                typeToTypeNode: function (type, enclosingDeclaration, flags) {
+                    var context = createNodeBuilderContext(enclosingDeclaration, flags);
+                    var resultingNode = typeToTypeNodeHelper(type, context);
+                    var result = context.encounteredError ? undefined : resultingNode;
+                    return result;
+                },
+                indexInfoToIndexSignatureDeclaration: function (indexInfo, kind, enclosingDeclaration, flags) {
+                    var context = createNodeBuilderContext(enclosingDeclaration, flags);
+                    var resultingNode = indexInfoToIndexSignatureDeclarationHelper(indexInfo, kind, context);
+                    var result = context.encounteredError ? undefined : resultingNode;
+                    return result;
+                },
+                signatureToSignatureDeclaration: function (signature, kind, enclosingDeclaration, flags) {
+                    var context = createNodeBuilderContext(enclosingDeclaration, flags);
+                    var resultingNode = signatureToSignatureDeclarationHelper(signature, kind, context);
+                    var result = context.encounteredError ? undefined : resultingNode;
+                    return result;
                 }
+            };
+            function createNodeBuilderContext(enclosingDeclaration, flags) {
+                return {
+                    enclosingDeclaration: enclosingDeclaration,
+                    flags: flags,
+                    encounteredError: false,
+                    symbolStack: undefined
+                };
             }
-        }
-        // Should not be called on a declaration with a computed property name,
-        // unless it is a well known Symbol.
-        function getDeclarationName(node) {
-            if (node.name) {
-                if (ts.isAmbientModule(node)) {
-                    return ts.isGlobalScopeAugmentation(node) ? "__global" : "\"" + node.name.text + "\"";
+            function typeToTypeNodeHelper(type, context) {
+                var inTypeAlias = context.flags & ts.NodeBuilderFlags.InTypeAlias;
+                context.flags &= ~ts.NodeBuilderFlags.InTypeAlias;
+                if (!type) {
+                    context.encounteredError = true;
+                    return undefined;
                 }
-                if (node.name.kind === 140 /* ComputedPropertyName */) {
-                    var nameExpression = node.name.expression;
-                    // treat computed property names where expression is string/numeric literal as just string/numeric literal
-                    if (ts.isStringOrNumericLiteral(nameExpression.kind)) {
-                        return nameExpression.text;
+                if (type.flags & 1 /* Any */) {
+                    return ts.createKeywordTypeNode(119 /* AnyKeyword */);
+                }
+                if (type.flags & 2 /* String */) {
+                    return ts.createKeywordTypeNode(136 /* StringKeyword */);
+                }
+                if (type.flags & 4 /* Number */) {
+                    return ts.createKeywordTypeNode(133 /* NumberKeyword */);
+                }
+                if (type.flags & 8 /* Boolean */) {
+                    return ts.createKeywordTypeNode(122 /* BooleanKeyword */);
+                }
+                if (type.flags & 256 /* EnumLiteral */ && !(type.flags & 65536 /* Union */)) {
+                    var parentSymbol = getParentOfSymbol(type.symbol);
+                    var parentName = symbolToName(parentSymbol, context, 793064 /* Type */, /*expectsIdentifier*/ false);
+                    var enumLiteralName = getDeclaredTypeOfSymbol(parentSymbol) === type ? parentName : ts.createQualifiedName(parentName, getNameOfSymbol(type.symbol, context));
+                    return ts.createTypeReferenceNode(enumLiteralName, /*typeArguments*/ undefined);
+                }
+                if (type.flags & 272 /* EnumLike */) {
+                    var name_11 = symbolToName(type.symbol, context, 793064 /* Type */, /*expectsIdentifier*/ false);
+                    return ts.createTypeReferenceNode(name_11, /*typeArguments*/ undefined);
+                }
+                if (type.flags & (32 /* StringLiteral */)) {
+                    return ts.createLiteralTypeNode(ts.setEmitFlags(ts.createLiteral(type.value), 16777216 /* NoAsciiEscaping */));
+                }
+                if (type.flags & (64 /* NumberLiteral */)) {
+                    return ts.createLiteralTypeNode((ts.createLiteral(type.value)));
+                }
+                if (type.flags & 128 /* BooleanLiteral */) {
+                    return type.intrinsicName === "true" ? ts.createTrue() : ts.createFalse();
+                }
+                if (type.flags & 1024 /* Void */) {
+                    return ts.createKeywordTypeNode(105 /* VoidKeyword */);
+                }
+                if (type.flags & 2048 /* Undefined */) {
+                    return ts.createKeywordTypeNode(139 /* UndefinedKeyword */);
+                }
+                if (type.flags & 4096 /* Null */) {
+                    return ts.createKeywordTypeNode(95 /* NullKeyword */);
+                }
+                if (type.flags & 8192 /* Never */) {
+                    return ts.createKeywordTypeNode(130 /* NeverKeyword */);
+                }
+                if (type.flags & 512 /* ESSymbol */) {
+                    return ts.createKeywordTypeNode(137 /* SymbolKeyword */);
+                }
+                if (type.flags & 16777216 /* NonPrimitive */) {
+                    return ts.createKeywordTypeNode(134 /* ObjectKeyword */);
+                }
+                if (type.flags & 16384 /* TypeParameter */ && type.isThisType) {
+                    if (context.flags & ts.NodeBuilderFlags.InObjectTypeLiteral) {
+                        if (!context.encounteredError && !(context.flags & ts.NodeBuilderFlags.AllowThisInObjectLiteral)) {
+                            context.encounteredError = true;
+                        }
                     }
-                    ts.Debug.assert(ts.isWellKnownSymbolSyntactically(nameExpression));
-                    return ts.getPropertyNameForKnownSymbolName(nameExpression.name.text);
+                    return ts.createThis();
                 }
-                return node.name.text;
-            }
-            switch (node.kind) {
-                case 148 /* Constructor */:
-                    return "__constructor";
-                case 156 /* FunctionType */:
-                case 151 /* CallSignature */:
-                    return "__call";
-                case 157 /* ConstructorType */:
-                case 152 /* ConstructSignature */:
-                    return "__new";
-                case 153 /* IndexSignature */:
-                    return "__index";
-                case 236 /* ExportDeclaration */:
-                    return "__export";
-                case 235 /* ExportAssignment */:
-                    return node.isExportEquals ? "export=" : "default";
-                case 187 /* BinaryExpression */:
-                    switch (ts.getSpecialPropertyAssignmentKind(node)) {
-                        case 2 /* ModuleExports */:
-                            // module.exports = ...
-                            return "export=";
-                        case 1 /* ExportsProperty */:
-                        case 4 /* ThisProperty */:
-                            // exports.x = ... or this.y = ...
-                            return node.left.name.text;
-                        case 3 /* PrototypeProperty */:
-                            // className.prototype.methodName = ...
-                            return node.left.expression.name.text;
+                var objectFlags = getObjectFlags(type);
+                if (objectFlags & 4 /* Reference */) {
+                    ts.Debug.assert(!!(type.flags & 32768 /* Object */));
+                    return typeReferenceToTypeNode(type);
+                }
+                if (type.flags & 16384 /* TypeParameter */ || objectFlags & 3 /* ClassOrInterface */) {
+                    var name_12 = symbolToName(type.symbol, context, 793064 /* Type */, /*expectsIdentifier*/ false);
+                    // Ignore constraint/default when creating a usage (as opposed to declaration) of a type parameter.
+                    return ts.createTypeReferenceNode(name_12, /*typeArguments*/ undefined);
+                }
+                if (!inTypeAlias && type.aliasSymbol &&
+                    isSymbolAccessible(type.aliasSymbol, context.enclosingDeclaration, 793064 /* Type */, /*shouldComputeAliasesToMakeVisible*/ false).accessibility === 0 /* Accessible */) {
+                    var name_13 = symbolToTypeReferenceName(type.aliasSymbol);
+                    var typeArgumentNodes = mapToTypeNodes(type.aliasTypeArguments, context);
+                    return ts.createTypeReferenceNode(name_13, typeArgumentNodes);
+                }
+                if (type.flags & (65536 /* Union */ | 131072 /* Intersection */)) {
+                    var types = type.flags & 65536 /* Union */ ? formatUnionTypes(type.types) : type.types;
+                    var typeNodes = mapToTypeNodes(types, context);
+                    if (typeNodes && typeNodes.length > 0) {
+                        var unionOrIntersectionTypeNode = ts.createUnionOrIntersectionTypeNode(type.flags & 65536 /* Union */ ? 166 /* UnionType */ : 167 /* IntersectionType */, typeNodes);
+                        return unionOrIntersectionTypeNode;
                     }
-                    ts.Debug.fail("Unknown binary declaration kind");
-                    break;
-                case 220 /* FunctionDeclaration */:
-                case 221 /* ClassDeclaration */:
-                    return ts.hasModifier(node, 512 /* Default */) ? "default" : undefined;
-                case 269 /* JSDocFunctionType */:
-                    return ts.isJSDocConstructSignature(node) ? "__new" : "__call";
-                case 142 /* Parameter */:
-                    // Parameters with names are handled at the top of this function.  Parameters
-                    // without names can only come from JSDocFunctionTypes.
-                    ts.Debug.assert(node.parent.kind === 269 /* JSDocFunctionType */);
-                    var functionType = node.parent;
-                    var index = ts.indexOf(functionType.parameters, node);
-                    return "arg" + index;
-                case 279 /* JSDocTypedefTag */:
-                    var parentNode = node.parent && node.parent.parent;
-                    var nameFromParentNode = void 0;
-                    if (parentNode && parentNode.kind === 200 /* VariableStatement */) {
-                        if (parentNode.declarationList.declarations.length > 0) {
-                            var nameIdentifier = parentNode.declarationList.declarations[0].name;
-                            if (nameIdentifier.kind === 69 /* Identifier */) {
-                                nameFromParentNode = nameIdentifier.text;
-                            }
+                    else {
+                        if (!context.encounteredError && !(context.flags & ts.NodeBuilderFlags.AllowEmptyUnionOrIntersection)) {
+                            context.encounteredError = true;
                         }
+                        return undefined;
                     }
-                    return nameFromParentNode;
-            }
-        }
-        function getDisplayName(node) {
-            return node.name ? ts.declarationNameToString(node.name) : getDeclarationName(node);
-        }
-        /**
-         * Declares a Symbol for the node and adds it to symbols. Reports errors for conflicting identifier names.
-         * @param symbolTable - The symbol table which node will be added to.
-         * @param parent - node's parent declaration.
-         * @param node - The declaration to be added to the symbol table
-         * @param includes - The SymbolFlags that node has in addition to its declaration type (eg: export, ambient, etc.)
-         * @param excludes - The flags which node cannot be declared alongside in a symbol table. Used to report forbidden declarations.
-         */
-        function declareSymbol(symbolTable, parent, node, includes, excludes) {
-            ts.Debug.assert(!ts.hasDynamicName(node));
-            var isDefaultExport = ts.hasModifier(node, 512 /* Default */);
-            // The exported symbol for an export default function/class node is always named "default"
-            var name = isDefaultExport && parent ? "default" : getDeclarationName(node);
-            var symbol;
-            if (name === undefined) {
-                symbol = createSymbol(0 /* None */, "__missing");
-            }
-            else {
-                // Check and see if the symbol table already has a symbol with this name.  If not,
-                // create a new symbol with this name and add it to the table.  Note that we don't
-                // give the new symbol any flags *yet*.  This ensures that it will not conflict
-                // with the 'excludes' flags we pass in.
-                //
-                // If we do get an existing symbol, see if it conflicts with the new symbol we're
-                // creating.  For example, a 'var' symbol and a 'class' symbol will conflict within
-                // the same symbol table.  If we have a conflict, report the issue on each
-                // declaration we have for this symbol, and then create a new symbol for this
-                // declaration.
-                //
-                // Note that when properties declared in Javascript constructors
-                // (marked by isReplaceableByMethod) conflict with another symbol, the property loses.
-                // Always. This allows the common Javascript pattern of overwriting a prototype method
-                // with an bound instance method of the same type: `this.method = this.method.bind(this)`
-                //
-                // If we created a new symbol, either because we didn't have a symbol with this name
-                // in the symbol table, or we conflicted with an existing symbol, then just add this
-                // node as the sole declaration of the new symbol.
-                //
-                // Otherwise, we'll be merging into a compatible existing symbol (for example when
-                // you have multiple 'vars' with the same name in the same container).  In this case
-                // just add this node into the declarations list of the symbol.
-                symbol = symbolTable[name] || (symbolTable[name] = createSymbol(0 /* None */, name));
-                if (name && (includes & 788448 /* Classifiable */)) {
-                    classifiableNames[name] = name;
                 }
-                if (symbol.flags & excludes) {
-                    if (symbol.isReplaceableByMethod) {
-                        // Javascript constructor-declared symbols can be discarded in favor of
-                        // prototype symbols like methods.
-                        symbol = symbolTable[name] = createSymbol(0 /* None */, name);
+                if (objectFlags & (16 /* Anonymous */ | 32 /* Mapped */)) {
+                    ts.Debug.assert(!!(type.flags & 32768 /* Object */));
+                    // The type is an object literal type.
+                    return createAnonymousTypeNode(type);
+                }
+                if (type.flags & 262144 /* Index */) {
+                    var indexedType = type.type;
+                    var indexTypeNode = typeToTypeNodeHelper(indexedType, context);
+                    return ts.createTypeOperatorNode(indexTypeNode);
+                }
+                if (type.flags & 524288 /* IndexedAccess */) {
+                    var objectTypeNode = typeToTypeNodeHelper(type.objectType, context);
+                    var indexTypeNode = typeToTypeNodeHelper(type.indexType, context);
+                    return ts.createIndexedAccessTypeNode(objectTypeNode, indexTypeNode);
+                }
+                ts.Debug.fail("Should be unreachable.");
+                function createMappedTypeNodeFromType(type) {
+                    ts.Debug.assert(!!(type.flags & 32768 /* Object */));
+                    var readonlyToken = type.declaration && type.declaration.readonlyToken ? ts.createToken(131 /* ReadonlyKeyword */) : undefined;
+                    var questionToken = type.declaration && type.declaration.questionToken ? ts.createToken(55 /* QuestionToken */) : undefined;
+                    var typeParameterNode = typeParameterToDeclaration(getTypeParameterFromMappedType(type), context);
+                    var templateTypeNode = typeToTypeNodeHelper(getTemplateTypeFromMappedType(type), context);
+                    var mappedTypeNode = ts.createMappedTypeNode(readonlyToken, typeParameterNode, questionToken, templateTypeNode);
+                    return ts.setEmitFlags(mappedTypeNode, 1 /* SingleLine */);
+                }
+                function createAnonymousTypeNode(type) {
+                    var symbol = type.symbol;
+                    if (symbol) {
+                        // Always use 'typeof T' for type of class, enum, and module objects
+                        if (symbol.flags & 32 /* Class */ && !getBaseTypeVariableOfClass(symbol) ||
+                            symbol.flags & (384 /* Enum */ | 512 /* ValueModule */) ||
+                            shouldWriteTypeOfFunctionSymbol()) {
+                            return createTypeQueryNodeFromSymbol(symbol, 107455 /* Value */);
+                        }
+                        else if (ts.contains(context.symbolStack, symbol)) {
+                            // If type is an anonymous type literal in a type alias declaration, use type alias name
+                            var typeAlias = getTypeAliasForTypeLiteral(type);
+                            if (typeAlias) {
+                                // The specified symbol flags need to be reinterpreted as type flags
+                                var entityName = symbolToName(typeAlias, context, 793064 /* Type */, /*expectsIdentifier*/ false);
+                                return ts.createTypeReferenceNode(entityName, /*typeArguments*/ undefined);
+                            }
+                            else {
+                                return ts.createKeywordTypeNode(119 /* AnyKeyword */);
+                            }
+                        }
+                        else {
+                            // Since instantiations of the same anonymous type have the same symbol, tracking symbols instead
+                            // of types allows us to catch circular references to instantiations of the same anonymous type
+                            if (!context.symbolStack) {
+                                context.symbolStack = [];
+                            }
+                            context.symbolStack.push(symbol);
+                            var result = createTypeNodeFromObjectType(type);
+                            context.symbolStack.pop();
+                            return result;
+                        }
                     }
                     else {
-                        if (node.name) {
-                            node.name.parent = node;
+                        // Anonymous types without a symbol are never circular.
+                        return createTypeNodeFromObjectType(type);
+                    }
+                    function shouldWriteTypeOfFunctionSymbol() {
+                        var isStaticMethodSymbol = !!(symbol.flags & 8192 /* Method */ &&
+                            ts.forEach(symbol.declarations, function (declaration) { return ts.getModifierFlags(declaration) & 32 /* Static */; }));
+                        var isNonLocalFunctionSymbol = !!(symbol.flags & 16 /* Function */) &&
+                            (symbol.parent ||
+                                ts.forEach(symbol.declarations, function (declaration) {
+                                    return declaration.parent.kind === 265 /* SourceFile */ || declaration.parent.kind === 234 /* ModuleBlock */;
+                                }));
+                        if (isStaticMethodSymbol || isNonLocalFunctionSymbol) {
+                            // typeof is allowed only for static/non local functions
+                            return ts.contains(context.symbolStack, symbol); // it is type of the symbol uses itself recursively
                         }
-                        // Report errors every position with duplicate declaration
-                        // Report errors on previous encountered declarations
-                        var message_1 = symbol.flags & 2 /* BlockScopedVariable */
-                            ? ts.Diagnostics.Cannot_redeclare_block_scoped_variable_0
-                            : ts.Diagnostics.Duplicate_identifier_0;
-                        ts.forEach(symbol.declarations, function (declaration) {
-                            if (ts.hasModifier(declaration, 512 /* Default */)) {
-                                message_1 = ts.Diagnostics.A_module_cannot_have_multiple_default_exports;
-                            }
-                        });
-                        ts.forEach(symbol.declarations, function (declaration) {
-                            file.bindDiagnostics.push(ts.createDiagnosticForNode(declaration.name || declaration, message_1, getDisplayName(declaration)));
-                        });
-                        file.bindDiagnostics.push(ts.createDiagnosticForNode(node.name || node, message_1, getDisplayName(node)));
-                        symbol = createSymbol(0 /* None */, name);
                     }
                 }
-            }
-            addDeclarationToSymbol(symbol, node, includes);
-            symbol.parent = parent;
-            return symbol;
-        }
-        function declareModuleMember(node, symbolFlags, symbolExcludes) {
-            var hasExportModifier = ts.getCombinedModifierFlags(node) & 1 /* Export */;
-            if (symbolFlags & 8388608 /* Alias */) {
-                if (node.kind === 238 /* ExportSpecifier */ || (node.kind === 229 /* ImportEqualsDeclaration */ && hasExportModifier)) {
-                    return declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
+                function createTypeNodeFromObjectType(type) {
+                    if (type.objectFlags & 32 /* Mapped */) {
+                        if (getConstraintTypeFromMappedType(type).flags & (16384 /* TypeParameter */ | 262144 /* Index */)) {
+                            return createMappedTypeNodeFromType(type);
+                        }
+                    }
+                    var resolved = resolveStructuredTypeMembers(type);
+                    if (!resolved.properties.length && !resolved.stringIndexInfo && !resolved.numberIndexInfo) {
+                        if (!resolved.callSignatures.length && !resolved.constructSignatures.length) {
+                            return ts.setEmitFlags(ts.createTypeLiteralNode(/*members*/ undefined), 1 /* SingleLine */);
+                        }
+                        if (resolved.callSignatures.length === 1 && !resolved.constructSignatures.length) {
+                            var signature = resolved.callSignatures[0];
+                            var signatureNode = signatureToSignatureDeclarationHelper(signature, 160 /* FunctionType */, context);
+                            return signatureNode;
+                        }
+                        if (resolved.constructSignatures.length === 1 && !resolved.callSignatures.length) {
+                            var signature = resolved.constructSignatures[0];
+                            var signatureNode = signatureToSignatureDeclarationHelper(signature, 161 /* ConstructorType */, context);
+                            return signatureNode;
+                        }
+                    }
+                    var savedFlags = context.flags;
+                    context.flags |= ts.NodeBuilderFlags.InObjectTypeLiteral;
+                    var members = createTypeNodesFromResolvedType(resolved);
+                    context.flags = savedFlags;
+                    var typeLiteralNode = ts.createTypeLiteralNode(members);
+                    return ts.setEmitFlags(typeLiteralNode, 1 /* SingleLine */);
                 }
-                else {
-                    return declareSymbol(container.locals, undefined, node, symbolFlags, symbolExcludes);
+                function createTypeQueryNodeFromSymbol(symbol, symbolFlags) {
+                    var entityName = symbolToName(symbol, context, symbolFlags, /*expectsIdentifier*/ false);
+                    return ts.createTypeQueryNode(entityName);
                 }
-            }
-            else {
-                // Exported module members are given 2 symbols: A local symbol that is classified with an ExportValue,
-                // ExportType, or ExportContainer flag, and an associated export symbol with all the correct flags set
-                // on it. There are 2 main reasons:
-                //
-                //   1. We treat locals and exports of the same name as mutually exclusive within a container.
-                //      That means the binder will issue a Duplicate Identifier error if you mix locals and exports
-                //      with the same name in the same container.
-                //      TODO: Make this a more specific error and decouple it from the exclusion logic.
-                //   2. When we checkIdentifier in the checker, we set its resolved symbol to the local symbol,
-                //      but return the export symbol (by calling getExportSymbolOfValueSymbolIfExported). That way
-                //      when the emitter comes back to it, it knows not to qualify the name if it was found in a containing scope.
-                // NOTE: Nested ambient modules always should go to to 'locals' table to prevent their automatic merge
-                //       during global merging in the checker. Why? The only case when ambient module is permitted inside another module is module augmentation
-                //       and this case is specially handled. Module augmentations should only be merged with original module definition
-                //       and should never be merged directly with other augmentation, and the latter case would be possible if automatic merge is allowed.
-                if (!ts.isAmbientModule(node) && (hasExportModifier || container.flags & 32 /* ExportContext */)) {
-                    var exportKind = (symbolFlags & 107455 /* Value */ ? 1048576 /* ExportValue */ : 0) |
-                        (symbolFlags & 793064 /* Type */ ? 2097152 /* ExportType */ : 0) |
-                        (symbolFlags & 1920 /* Namespace */ ? 4194304 /* ExportNamespace */ : 0);
-                    var local = declareSymbol(container.locals, undefined, node, exportKind, symbolExcludes);
-                    local.exportSymbol = declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
-                    node.localSymbol = local;
-                    return local;
+                function symbolToTypeReferenceName(symbol) {
+                    // Unnamed function expressions and arrow functions have reserved names that we don't want to display
+                    var entityName = symbol.flags & 32 /* Class */ || !isReservedMemberName(symbol.name) ? symbolToName(symbol, context, 793064 /* Type */, /*expectsIdentifier*/ false) : ts.createIdentifier("");
+                    return entityName;
                 }
-                else {
-                    return declareSymbol(container.locals, undefined, node, symbolFlags, symbolExcludes);
+                function typeReferenceToTypeNode(type) {
+                    var typeArguments = type.typeArguments || emptyArray;
+                    if (type.target === globalArrayType) {
+                        if (context.flags & ts.NodeBuilderFlags.WriteArrayAsGenericType) {
+                            var typeArgumentNode = typeToTypeNodeHelper(typeArguments[0], context);
+                            return ts.createTypeReferenceNode("Array", [typeArgumentNode]);
+                        }
+                        var elementType = typeToTypeNodeHelper(typeArguments[0], context);
+                        return ts.createArrayTypeNode(elementType);
+                    }
+                    else if (type.target.objectFlags & 8 /* Tuple */) {
+                        if (typeArguments.length > 0) {
+                            var tupleConstituentNodes = mapToTypeNodes(typeArguments.slice(0, getTypeReferenceArity(type)), context);
+                            if (tupleConstituentNodes && tupleConstituentNodes.length > 0) {
+                                return ts.createTupleTypeNode(tupleConstituentNodes);
+                            }
+                        }
+                        if (!context.encounteredError && !(context.flags & ts.NodeBuilderFlags.AllowEmptyTuple)) {
+                            context.encounteredError = true;
+                        }
+                        return undefined;
+                    }
+                    else {
+                        var outerTypeParameters = type.target.outerTypeParameters;
+                        var i = 0;
+                        var qualifiedName = void 0;
+                        if (outerTypeParameters) {
+                            var length_1 = outerTypeParameters.length;
+                            while (i < length_1) {
+                                // Find group of type arguments for type parameters with the same declaring container.
+                                var start = i;
+                                var parent_6 = getParentSymbolOfTypeParameter(outerTypeParameters[i]);
+                                do {
+                                    i++;
+                                } while (i < length_1 && getParentSymbolOfTypeParameter(outerTypeParameters[i]) === parent_6);
+                                // When type parameters are their own type arguments for the whole group (i.e. we have
+                                // the default outer type arguments), we don't show the group.
+                                if (!ts.rangeEquals(outerTypeParameters, typeArguments, start, i)) {
+                                    var typeArgumentSlice = mapToTypeNodes(typeArguments.slice(start, i), context);
+                                    var typeArgumentNodes_1 = typeArgumentSlice && ts.createNodeArray(typeArgumentSlice);
+                                    var namePart = symbolToTypeReferenceName(parent_6);
+                                    (namePart.kind === 71 /* Identifier */ ? namePart : namePart.right).typeArguments = typeArgumentNodes_1;
+                                    if (qualifiedName) {
+                                        ts.Debug.assert(!qualifiedName.right);
+                                        qualifiedName = addToQualifiedNameMissingRightIdentifier(qualifiedName, namePart);
+                                        qualifiedName = ts.createQualifiedName(qualifiedName, /*right*/ undefined);
+                                    }
+                                    else {
+                                        qualifiedName = ts.createQualifiedName(namePart, /*right*/ undefined);
+                                    }
+                                }
+                            }
+                        }
+                        var entityName = undefined;
+                        var nameIdentifier = symbolToTypeReferenceName(type.symbol);
+                        if (qualifiedName) {
+                            ts.Debug.assert(!qualifiedName.right);
+                            qualifiedName = addToQualifiedNameMissingRightIdentifier(qualifiedName, nameIdentifier);
+                            entityName = qualifiedName;
+                        }
+                        else {
+                            entityName = nameIdentifier;
+                        }
+                        var typeArgumentNodes = void 0;
+                        if (typeArguments.length > 0) {
+                            var typeParameterCount = (type.target.typeParameters || emptyArray).length;
+                            typeArgumentNodes = mapToTypeNodes(typeArguments.slice(i, typeParameterCount), context);
+                        }
+                        if (typeArgumentNodes) {
+                            var lastIdentifier = entityName.kind === 71 /* Identifier */ ? entityName : entityName.right;
+                            lastIdentifier.typeArguments = undefined;
+                        }
+                        return ts.createTypeReferenceNode(entityName, typeArgumentNodes);
+                    }
                 }
-            }
-        }
-        // All container nodes are kept on a linked list in declaration order. This list is used by
-        // the getLocalNameOfContainer function in the type checker to validate that the local name
-        // used for a container is unique.
-        function bindContainer(node, containerFlags) {
-            // Before we recurse into a node's children, we first save the existing parent, container
-            // and block-container.  Then after we pop out of processing the children, we restore
-            // these saved values.
-            var saveContainer = container;
-            var savedBlockScopeContainer = blockScopeContainer;
-            // Depending on what kind of node this is, we may have to adjust the current container
-            // and block-container.   If the current node is a container, then it is automatically
-            // considered the current block-container as well.  Also, for containers that we know
-            // may contain locals, we proactively initialize the .locals field. We do this because
-            // it's highly likely that the .locals will be needed to place some child in (for example,
-            // a parameter, or variable declaration).
-            //
-            // However, we do not proactively create the .locals for block-containers because it's
-            // totally normal and common for block-containers to never actually have a block-scoped
-            // variable in them.  We don't want to end up allocating an object for every 'block' we
-            // run into when most of them won't be necessary.
-            //
-            // Finally, if this is a block-container, then we clear out any existing .locals object
-            // it may contain within it.  This happens in incremental scenarios.  Because we can be
-            // reusing a node from a previous compilation, that node may have had 'locals' created
-            // for it.  We must clear this so we don't accidentally move any stale data forward from
-            // a previous compilation.
-            if (containerFlags & 1 /* IsContainer */) {
-                container = blockScopeContainer = node;
-                if (containerFlags & 32 /* HasLocals */) {
-                    container.locals = ts.createMap();
+                function addToQualifiedNameMissingRightIdentifier(left, right) {
+                    ts.Debug.assert(left.right === undefined);
+                    if (right.kind === 71 /* Identifier */) {
+                        left.right = right;
+                        return left;
+                    }
+                    var rightPart = right;
+                    while (rightPart.left.kind !== 71 /* Identifier */) {
+                        rightPart = rightPart.left;
+                    }
+                    left.right = rightPart.left;
+                    rightPart.left = left;
+                    return right;
+                }
+                function createTypeNodesFromResolvedType(resolvedType) {
+                    var typeElements = [];
+                    for (var _i = 0, _a = resolvedType.callSignatures; _i < _a.length; _i++) {
+                        var signature = _a[_i];
+                        typeElements.push(signatureToSignatureDeclarationHelper(signature, 155 /* CallSignature */, context));
+                    }
+                    for (var _b = 0, _c = resolvedType.constructSignatures; _b < _c.length; _b++) {
+                        var signature = _c[_b];
+                        typeElements.push(signatureToSignatureDeclarationHelper(signature, 156 /* ConstructSignature */, context));
+                    }
+                    if (resolvedType.stringIndexInfo) {
+                        typeElements.push(indexInfoToIndexSignatureDeclarationHelper(resolvedType.stringIndexInfo, 0 /* String */, context));
+                    }
+                    if (resolvedType.numberIndexInfo) {
+                        typeElements.push(indexInfoToIndexSignatureDeclarationHelper(resolvedType.numberIndexInfo, 1 /* Number */, context));
+                    }
+                    var properties = resolvedType.properties;
+                    if (!properties) {
+                        return typeElements;
+                    }
+                    for (var _d = 0, properties_1 = properties; _d < properties_1.length; _d++) {
+                        var propertySymbol = properties_1[_d];
+                        var propertyType = getTypeOfSymbol(propertySymbol);
+                        var saveEnclosingDeclaration = context.enclosingDeclaration;
+                        context.enclosingDeclaration = undefined;
+                        var propertyName = symbolToName(propertySymbol, context, 107455 /* Value */, /*expectsIdentifier*/ true);
+                        context.enclosingDeclaration = saveEnclosingDeclaration;
+                        var optionalToken = propertySymbol.flags & 67108864 /* Optional */ ? ts.createToken(55 /* QuestionToken */) : undefined;
+                        if (propertySymbol.flags & (16 /* Function */ | 8192 /* Method */) && !getPropertiesOfObjectType(propertyType).length) {
+                            var signatures = getSignaturesOfType(propertyType, 0 /* Call */);
+                            for (var _e = 0, signatures_1 = signatures; _e < signatures_1.length; _e++) {
+                                var signature = signatures_1[_e];
+                                var methodDeclaration = signatureToSignatureDeclarationHelper(signature, 150 /* MethodSignature */, context);
+                                methodDeclaration.name = propertyName;
+                                methodDeclaration.questionToken = optionalToken;
+                                typeElements.push(methodDeclaration);
+                            }
+                        }
+                        else {
+                            var propertyTypeNode = propertyType ? typeToTypeNodeHelper(propertyType, context) : ts.createKeywordTypeNode(119 /* AnyKeyword */);
+                            var modifiers = isReadonlySymbol(propertySymbol) ? [ts.createToken(131 /* ReadonlyKeyword */)] : undefined;
+                            var propertySignature = ts.createPropertySignature(modifiers, propertyName, optionalToken, propertyTypeNode, 
+                            /*initializer*/ undefined);
+                            typeElements.push(propertySignature);
+                        }
+                    }
+                    return typeElements.length ? typeElements : undefined;
                 }
-                addToContainerChain(container);
             }
-            else if (containerFlags & 2 /* IsBlockScopedContainer */) {
-                blockScopeContainer = node;
-                blockScopeContainer.locals = undefined;
+            function mapToTypeNodes(types, context) {
+                if (ts.some(types)) {
+                    var result = [];
+                    for (var i = 0; i < types.length; ++i) {
+                        var type = types[i];
+                        var typeNode = typeToTypeNodeHelper(type, context);
+                        if (typeNode) {
+                            result.push(typeNode);
+                        }
+                    }
+                    return result;
+                }
             }
-            if (containerFlags & 4 /* IsControlFlowContainer */) {
-                var saveCurrentFlow = currentFlow;
-                var saveBreakTarget = currentBreakTarget;
-                var saveContinueTarget = currentContinueTarget;
-                var saveReturnTarget = currentReturnTarget;
-                var saveActiveLabels = activeLabels;
-                var saveHasExplicitReturn = hasExplicitReturn;
-                var isIIFE = containerFlags & 16 /* IsFunctionExpression */ && !!ts.getImmediatelyInvokedFunctionExpression(node);
-                // An IIFE is considered part of the containing control flow. Return statements behave
-                // similarly to break statements that exit to a label just past the statement body.
-                if (isIIFE) {
-                    currentReturnTarget = createBranchLabel();
+            function indexInfoToIndexSignatureDeclarationHelper(indexInfo, kind, context) {
+                var name = ts.getNameFromIndexInfo(indexInfo) || "x";
+                var indexerTypeNode = ts.createKeywordTypeNode(kind === 0 /* String */ ? 136 /* StringKeyword */ : 133 /* NumberKeyword */);
+                var indexingParameter = ts.createParameter(
+                /*decorators*/ undefined, 
+                /*modifiers*/ undefined, 
+                /*dotDotDotToken*/ undefined, name, 
+                /*questionToken*/ undefined, indexerTypeNode, 
+                /*initializer*/ undefined);
+                var typeNode = typeToTypeNodeHelper(indexInfo.type, context);
+                return ts.createIndexSignature(
+                /*decorators*/ undefined, indexInfo.isReadonly ? [ts.createToken(131 /* ReadonlyKeyword */)] : undefined, [indexingParameter], typeNode);
+            }
+            function signatureToSignatureDeclarationHelper(signature, kind, context) {
+                var typeParameters = signature.typeParameters && signature.typeParameters.map(function (parameter) { return typeParameterToDeclaration(parameter, context); });
+                var parameters = signature.parameters.map(function (parameter) { return symbolToParameterDeclaration(parameter, context); });
+                if (signature.thisParameter) {
+                    var thisParameter = symbolToParameterDeclaration(signature.thisParameter, context);
+                    parameters.unshift(thisParameter);
+                }
+                var returnTypeNode;
+                if (signature.typePredicate) {
+                    var typePredicate = signature.typePredicate;
+                    var parameterName = typePredicate.kind === 1 /* Identifier */ ?
+                        ts.setEmitFlags(ts.createIdentifier(typePredicate.parameterName), 16777216 /* NoAsciiEscaping */) :
+                        ts.createThisTypeNode();
+                    var typeNode = typeToTypeNodeHelper(typePredicate.type, context);
+                    returnTypeNode = ts.createTypePredicateNode(parameterName, typeNode);
                 }
                 else {
-                    currentFlow = { flags: 2 /* Start */ };
-                    if (containerFlags & 16 /* IsFunctionExpression */) {
-                        currentFlow.container = node;
-                    }
-                    currentReturnTarget = undefined;
+                    var returnType = getReturnTypeOfSignature(signature);
+                    returnTypeNode = returnType && typeToTypeNodeHelper(returnType, context);
                 }
-                currentBreakTarget = undefined;
-                currentContinueTarget = undefined;
-                activeLabels = undefined;
-                hasExplicitReturn = false;
-                bindChildren(node);
-                // Reset all reachability check related flags on node (for incremental scenarios)
-                // Reset all emit helper flags on node (for incremental scenarios)
-                node.flags &= ~32128 /* ReachabilityAndEmitFlags */;
-                if (!(currentFlow.flags & 1 /* Unreachable */) && containerFlags & 8 /* IsFunctionLike */ && ts.nodeIsPresent(node.body)) {
-                    node.flags |= 128 /* HasImplicitReturn */;
-                    if (hasExplicitReturn)
-                        node.flags |= 256 /* HasExplicitReturn */;
+                if (context.flags & ts.NodeBuilderFlags.SuppressAnyReturnType) {
+                    if (returnTypeNode && returnTypeNode.kind === 119 /* AnyKeyword */) {
+                        returnTypeNode = undefined;
+                    }
                 }
-                if (node.kind === 256 /* SourceFile */) {
-                    node.flags |= emitFlags;
+                else if (!returnTypeNode) {
+                    returnTypeNode = ts.createKeywordTypeNode(119 /* AnyKeyword */);
                 }
-                if (isIIFE) {
-                    addAntecedent(currentReturnTarget, currentFlow);
-                    currentFlow = finishFlowLabel(currentReturnTarget);
+                return ts.createSignatureDeclaration(kind, typeParameters, parameters, returnTypeNode);
+            }
+            function typeParameterToDeclaration(type, context) {
+                var name = symbolToName(type.symbol, context, 793064 /* Type */, /*expectsIdentifier*/ true);
+                var constraint = getConstraintFromTypeParameter(type);
+                var constraintNode = constraint && typeToTypeNodeHelper(constraint, context);
+                var defaultParameter = getDefaultFromTypeParameter(type);
+                var defaultParameterNode = defaultParameter && typeToTypeNodeHelper(defaultParameter, context);
+                return ts.createTypeParameterDeclaration(name, constraintNode, defaultParameterNode);
+            }
+            function symbolToParameterDeclaration(parameterSymbol, context) {
+                var parameterDeclaration = ts.getDeclarationOfKind(parameterSymbol, 146 /* Parameter */);
+                if (isTransientSymbol(parameterSymbol) && parameterSymbol.isRestParameter) {
+                    // special-case synthetic rest parameters in JS files
+                    return ts.createParameter(
+                    /*decorators*/ undefined, 
+                    /*modifiers*/ undefined, parameterSymbol.isRestParameter ? ts.createToken(24 /* DotDotDotToken */) : undefined, "args", 
+                    /*questionToken*/ undefined, typeToTypeNodeHelper(anyArrayType, context), 
+                    /*initializer*/ undefined);
+                }
+                var modifiers = parameterDeclaration.modifiers && parameterDeclaration.modifiers.map(ts.getSynthesizedClone);
+                var dotDotDotToken = ts.isRestParameter(parameterDeclaration) ? ts.createToken(24 /* DotDotDotToken */) : undefined;
+                var name = parameterDeclaration.name ?
+                    parameterDeclaration.name.kind === 71 /* Identifier */ ?
+                        ts.setEmitFlags(ts.getSynthesizedClone(parameterDeclaration.name), 16777216 /* NoAsciiEscaping */) :
+                        cloneBindingName(parameterDeclaration.name) :
+                    parameterSymbol.name;
+                var questionToken = isOptionalParameter(parameterDeclaration) ? ts.createToken(55 /* QuestionToken */) : undefined;
+                var parameterType = getTypeOfSymbol(parameterSymbol);
+                if (isRequiredInitializedParameter(parameterDeclaration)) {
+                    parameterType = getNullableType(parameterType, 2048 /* Undefined */);
+                }
+                var parameterTypeNode = typeToTypeNodeHelper(parameterType, context);
+                var parameterNode = ts.createParameter(
+                /*decorators*/ undefined, modifiers, dotDotDotToken, name, questionToken, parameterTypeNode, 
+                /*initializer*/ undefined);
+                return parameterNode;
+                function cloneBindingName(node) {
+                    return elideInitializerAndSetEmitFlags(node);
+                    function elideInitializerAndSetEmitFlags(node) {
+                        var visited = ts.visitEachChild(node, elideInitializerAndSetEmitFlags, ts.nullTransformationContext, /*nodesVisitor*/ undefined, elideInitializerAndSetEmitFlags);
+                        var clone = ts.nodeIsSynthesized(visited) ? visited : ts.getSynthesizedClone(visited);
+                        if (clone.kind === 176 /* BindingElement */) {
+                            clone.initializer = undefined;
+                        }
+                        return ts.setEmitFlags(clone, 1 /* SingleLine */ | 16777216 /* NoAsciiEscaping */);
+                    }
+                }
+            }
+            function symbolToName(symbol, context, meaning, expectsIdentifier) {
+                // Try to get qualified name if the symbol is not a type parameter and there is an enclosing declaration.
+                var chain;
+                var isTypeParameter = symbol.flags & 262144 /* TypeParameter */;
+                if (!isTypeParameter && (context.enclosingDeclaration || context.flags & ts.NodeBuilderFlags.UseFullyQualifiedType)) {
+                    chain = getSymbolChain(symbol, meaning, /*endOfChain*/ true);
+                    ts.Debug.assert(chain && chain.length > 0);
                 }
                 else {
-                    currentFlow = saveCurrentFlow;
+                    chain = [symbol];
+                }
+                if (expectsIdentifier && chain.length !== 1
+                    && !context.encounteredError
+                    && !(context.flags & ts.NodeBuilderFlags.AllowQualifedNameInPlaceOfIdentifier)) {
+                    context.encounteredError = true;
+                }
+                return createEntityNameFromSymbolChain(chain, chain.length - 1);
+                function createEntityNameFromSymbolChain(chain, index) {
+                    ts.Debug.assert(chain && 0 <= index && index < chain.length);
+                    var symbol = chain[index];
+                    var typeParameterNodes;
+                    if (context.flags & ts.NodeBuilderFlags.WriteTypeParametersInQualifiedName && index > 0) {
+                        var parentSymbol = chain[index - 1];
+                        var typeParameters = void 0;
+                        if (ts.getCheckFlags(symbol) & 1 /* Instantiated */) {
+                            typeParameters = getTypeParametersOfClassOrInterface(parentSymbol);
+                        }
+                        else {
+                            var targetSymbol = getTargetSymbol(parentSymbol);
+                            if (targetSymbol.flags & (32 /* Class */ | 64 /* Interface */ | 524288 /* TypeAlias */)) {
+                                typeParameters = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol);
+                            }
+                        }
+                        typeParameterNodes = mapToTypeNodes(typeParameters, context);
+                    }
+                    var symbolName = getNameOfSymbol(symbol, context);
+                    var identifier = ts.setEmitFlags(ts.createIdentifier(symbolName, typeParameterNodes), 16777216 /* NoAsciiEscaping */);
+                    return index > 0 ? ts.createQualifiedName(createEntityNameFromSymbolChain(chain, index - 1), identifier) : identifier;
                 }
-                currentBreakTarget = saveBreakTarget;
-                currentContinueTarget = saveContinueTarget;
-                currentReturnTarget = saveReturnTarget;
-                activeLabels = saveActiveLabels;
-                hasExplicitReturn = saveHasExplicitReturn;
-            }
-            else if (containerFlags & 64 /* IsInterface */) {
-                seenThisKeyword = false;
-                bindChildren(node);
-                node.flags = seenThisKeyword ? node.flags | 64 /* ContainsThis */ : node.flags & ~64 /* ContainsThis */;
-            }
-            else {
-                bindChildren(node);
-            }
-            container = saveContainer;
-            blockScopeContainer = savedBlockScopeContainer;
-        }
-        function bindChildren(node) {
-            if (skipTransformFlagAggregation) {
-                bindChildrenWorker(node);
-            }
-            else if (node.transformFlags & 536870912 /* HasComputedFlags */) {
-                skipTransformFlagAggregation = true;
-                bindChildrenWorker(node);
-                skipTransformFlagAggregation = false;
-            }
-            else {
-                var savedSubtreeTransformFlags = subtreeTransformFlags;
-                subtreeTransformFlags = 0;
-                bindChildrenWorker(node);
-                subtreeTransformFlags = savedSubtreeTransformFlags | computeTransformFlagsForNode(node, subtreeTransformFlags);
-            }
-        }
-        function bindChildrenWorker(node) {
-            // Binding of JsDocComment should be done before the current block scope container changes.
-            // because the scope of JsDocComment should not be affected by whether the current node is a
-            // container or not.
-            if (ts.isInJavaScriptFile(node) && node.jsDocComments) {
-                ts.forEach(node.jsDocComments, bind);
-            }
-            if (checkUnreachable(node)) {
-                ts.forEachChild(node, bind);
-                return;
-            }
-            switch (node.kind) {
-                case 205 /* WhileStatement */:
-                    bindWhileStatement(node);
-                    break;
-                case 204 /* DoStatement */:
-                    bindDoStatement(node);
-                    break;
-                case 206 /* ForStatement */:
-                    bindForStatement(node);
-                    break;
-                case 207 /* ForInStatement */:
-                case 208 /* ForOfStatement */:
-                    bindForInOrForOfStatement(node);
-                    break;
-                case 203 /* IfStatement */:
-                    bindIfStatement(node);
-                    break;
-                case 211 /* ReturnStatement */:
-                case 215 /* ThrowStatement */:
-                    bindReturnOrThrow(node);
-                    break;
-                case 210 /* BreakStatement */:
-                case 209 /* ContinueStatement */:
-                    bindBreakOrContinueStatement(node);
-                    break;
-                case 216 /* TryStatement */:
-                    bindTryStatement(node);
-                    break;
-                case 213 /* SwitchStatement */:
-                    bindSwitchStatement(node);
-                    break;
-                case 227 /* CaseBlock */:
-                    bindCaseBlock(node);
-                    break;
-                case 249 /* CaseClause */:
-                    bindCaseClause(node);
-                    break;
-                case 214 /* LabeledStatement */:
-                    bindLabeledStatement(node);
-                    break;
-                case 185 /* PrefixUnaryExpression */:
-                    bindPrefixUnaryExpressionFlow(node);
-                    break;
-                case 186 /* PostfixUnaryExpression */:
-                    bindPostfixUnaryExpressionFlow(node);
-                    break;
-                case 187 /* BinaryExpression */:
-                    bindBinaryExpressionFlow(node);
-                    break;
-                case 181 /* DeleteExpression */:
-                    bindDeleteExpressionFlow(node);
-                    break;
-                case 188 /* ConditionalExpression */:
-                    bindConditionalExpressionFlow(node);
-                    break;
-                case 218 /* VariableDeclaration */:
-                    bindVariableDeclarationFlow(node);
-                    break;
-                case 174 /* CallExpression */:
-                    bindCallExpressionFlow(node);
-                    break;
-                default:
-                    ts.forEachChild(node, bind);
-                    break;
-            }
-        }
-        function isNarrowingExpression(expr) {
-            switch (expr.kind) {
-                case 69 /* Identifier */:
-                case 97 /* ThisKeyword */:
-                case 172 /* PropertyAccessExpression */:
-                    return isNarrowableReference(expr);
-                case 174 /* CallExpression */:
-                    return hasNarrowableArgument(expr);
-                case 178 /* ParenthesizedExpression */:
-                    return isNarrowingExpression(expr.expression);
-                case 187 /* BinaryExpression */:
-                    return isNarrowingBinaryExpression(expr);
-                case 185 /* PrefixUnaryExpression */:
-                    return expr.operator === 49 /* ExclamationToken */ && isNarrowingExpression(expr.operand);
-            }
-            return false;
-        }
-        function isNarrowableReference(expr) {
-            return expr.kind === 69 /* Identifier */ ||
-                expr.kind === 97 /* ThisKeyword */ ||
-                expr.kind === 172 /* PropertyAccessExpression */ && isNarrowableReference(expr.expression);
-        }
-        function hasNarrowableArgument(expr) {
-            if (expr.arguments) {
-                for (var _i = 0, _a = expr.arguments; _i < _a.length; _i++) {
-                    var argument = _a[_i];
-                    if (isNarrowableReference(argument)) {
-                        return true;
+                /** @param endOfChain Set to false for recursive calls; non-recursive calls should always output something. */
+                function getSymbolChain(symbol, meaning, endOfChain) {
+                    var accessibleSymbolChain = getAccessibleSymbolChain(symbol, context.enclosingDeclaration, meaning, /*useOnlyExternalAliasing*/ false);
+                    var parentSymbol;
+                    if (!accessibleSymbolChain ||
+                        needsQualification(accessibleSymbolChain[0], context.enclosingDeclaration, accessibleSymbolChain.length === 1 ? meaning : getQualifiedLeftMeaning(meaning))) {
+                        // Go up and add our parent.
+                        var parent_7 = getParentOfSymbol(accessibleSymbolChain ? accessibleSymbolChain[0] : symbol);
+                        if (parent_7) {
+                            var parentChain = getSymbolChain(parent_7, getQualifiedLeftMeaning(meaning), /*endOfChain*/ false);
+                            if (parentChain) {
+                                parentSymbol = parent_7;
+                                accessibleSymbolChain = parentChain.concat(accessibleSymbolChain || [symbol]);
+                            }
+                        }
+                    }
+                    if (accessibleSymbolChain) {
+                        return accessibleSymbolChain;
+                    }
+                    if (
+                    // If this is the last part of outputting the symbol, always output. The cases apply only to parent symbols.
+                    endOfChain ||
+                        // If a parent symbol is an external module, don't write it. (We prefer just `x` vs `"foo/bar".x`.)
+                        !(!parentSymbol && ts.forEach(symbol.declarations, hasExternalModuleSymbol)) &&
+                            // If a parent symbol is an anonymous type, don't write it.
+                            !(symbol.flags & (2048 /* TypeLiteral */ | 4096 /* ObjectLiteral */))) {
+                        return [symbol];
                     }
                 }
             }
-            if (expr.expression.kind === 172 /* PropertyAccessExpression */ &&
-                isNarrowableReference(expr.expression.expression)) {
-                return true;
-            }
-            return false;
-        }
-        function isNarrowingTypeofOperands(expr1, expr2) {
-            return expr1.kind === 182 /* TypeOfExpression */ && isNarrowableOperand(expr1.expression) && expr2.kind === 9 /* StringLiteral */;
-        }
-        function isNarrowingBinaryExpression(expr) {
-            switch (expr.operatorToken.kind) {
-                case 56 /* EqualsToken */:
-                    return isNarrowableReference(expr.left);
-                case 30 /* EqualsEqualsToken */:
-                case 31 /* ExclamationEqualsToken */:
-                case 32 /* EqualsEqualsEqualsToken */:
-                case 33 /* ExclamationEqualsEqualsToken */:
-                    return isNarrowableOperand(expr.left) || isNarrowableOperand(expr.right) ||
-                        isNarrowingTypeofOperands(expr.right, expr.left) || isNarrowingTypeofOperands(expr.left, expr.right);
-                case 91 /* InstanceOfKeyword */:
-                    return isNarrowableOperand(expr.left);
-                case 24 /* CommaToken */:
-                    return isNarrowingExpression(expr.right);
-            }
-            return false;
-        }
-        function isNarrowableOperand(expr) {
-            switch (expr.kind) {
-                case 178 /* ParenthesizedExpression */:
-                    return isNarrowableOperand(expr.expression);
-                case 187 /* BinaryExpression */:
-                    switch (expr.operatorToken.kind) {
-                        case 56 /* EqualsToken */:
-                            return isNarrowableOperand(expr.left);
-                        case 24 /* CommaToken */:
-                            return isNarrowableOperand(expr.right);
+            function getNameOfSymbol(symbol, context) {
+                var declaration = ts.firstOrUndefined(symbol.declarations);
+                if (declaration) {
+                    var name_14 = ts.getNameOfDeclaration(declaration);
+                    if (name_14) {
+                        return ts.declarationNameToString(name_14);
                     }
+                    if (declaration.parent && declaration.parent.kind === 226 /* VariableDeclaration */) {
+                        return ts.declarationNameToString(declaration.parent.name);
+                    }
+                    if (!context.encounteredError && !(context.flags & ts.NodeBuilderFlags.AllowAnonymousIdentifier)) {
+                        context.encounteredError = true;
+                    }
+                    switch (declaration.kind) {
+                        case 199 /* ClassExpression */:
+                            return "(Anonymous class)";
+                        case 186 /* FunctionExpression */:
+                        case 187 /* ArrowFunction */:
+                            return "(Anonymous function)";
+                    }
+                }
+                return symbol.name;
             }
-            return isNarrowableReference(expr);
-        }
-        function createBranchLabel() {
-            return {
-                flags: 4 /* BranchLabel */,
-                antecedents: undefined
-            };
-        }
-        function createLoopLabel() {
-            return {
-                flags: 8 /* LoopLabel */,
-                antecedents: undefined
-            };
-        }
-        function setFlowNodeReferenced(flow) {
-            // On first reference we set the Referenced flag, thereafter we set the Shared flag
-            flow.flags |= flow.flags & 256 /* Referenced */ ? 512 /* Shared */ : 256 /* Referenced */;
-        }
-        function addAntecedent(label, antecedent) {
-            if (!(antecedent.flags & 1 /* Unreachable */) && !ts.contains(label.antecedents, antecedent)) {
-                (label.antecedents || (label.antecedents = [])).push(antecedent);
-                setFlowNodeReferenced(antecedent);
-            }
-        }
-        function createFlowCondition(flags, antecedent, expression) {
-            if (antecedent.flags & 1 /* Unreachable */) {
-                return antecedent;
-            }
-            if (!expression) {
-                return flags & 32 /* TrueCondition */ ? antecedent : unreachableFlow;
-            }
-            if (expression.kind === 99 /* TrueKeyword */ && flags & 64 /* FalseCondition */ ||
-                expression.kind === 84 /* FalseKeyword */ && flags & 32 /* TrueCondition */) {
-                return unreachableFlow;
-            }
-            if (!isNarrowingExpression(expression)) {
-                return antecedent;
-            }
-            setFlowNodeReferenced(antecedent);
-            return {
-                flags: flags,
-                expression: expression,
-                antecedent: antecedent
-            };
         }
-        function createFlowSwitchClause(antecedent, switchStatement, clauseStart, clauseEnd) {
-            if (!isNarrowingExpression(switchStatement.expression)) {
-                return antecedent;
-            }
-            setFlowNodeReferenced(antecedent);
-            return {
-                flags: 128 /* SwitchClause */,
-                switchStatement: switchStatement,
-                clauseStart: clauseStart,
-                clauseEnd: clauseEnd,
-                antecedent: antecedent
-            };
+        function typePredicateToString(typePredicate, enclosingDeclaration, flags) {
+            var writer = ts.getSingleLineStringWriter();
+            getSymbolDisplayBuilder().buildTypePredicateDisplay(typePredicate, writer, enclosingDeclaration, flags);
+            var result = writer.string();
+            ts.releaseStringWriter(writer);
+            return result;
         }
-        function createFlowAssignment(antecedent, node) {
-            setFlowNodeReferenced(antecedent);
-            return {
-                flags: 16 /* Assignment */,
-                antecedent: antecedent,
-                node: node
-            };
+        function formatUnionTypes(types) {
+            var result = [];
+            var flags = 0;
+            for (var i = 0; i < types.length; i++) {
+                var t = types[i];
+                flags |= t.flags;
+                if (!(t.flags & 6144 /* Nullable */)) {
+                    if (t.flags & (128 /* BooleanLiteral */ | 256 /* EnumLiteral */)) {
+                        var baseType = t.flags & 128 /* BooleanLiteral */ ? booleanType : getBaseTypeOfEnumLiteralType(t);
+                        if (baseType.flags & 65536 /* Union */) {
+                            var count = baseType.types.length;
+                            if (i + count <= types.length && types[i + count - 1] === baseType.types[count - 1]) {
+                                result.push(baseType);
+                                i += count - 1;
+                                continue;
+                            }
+                        }
+                    }
+                    result.push(t);
+                }
+            }
+            if (flags & 4096 /* Null */)
+                result.push(nullType);
+            if (flags & 2048 /* Undefined */)
+                result.push(undefinedType);
+            return result || types;
         }
-        function finishFlowLabel(flow) {
-            var antecedents = flow.antecedents;
-            if (!antecedents) {
-                return unreachableFlow;
+        function visibilityToString(flags) {
+            if (flags === 8 /* Private */) {
+                return "private";
             }
-            if (antecedents.length === 1) {
-                return antecedents[0];
+            if (flags === 16 /* Protected */) {
+                return "protected";
             }
-            return flow;
+            return "public";
         }
-        function isStatementCondition(node) {
-            var parent = node.parent;
-            switch (parent.kind) {
-                case 203 /* IfStatement */:
-                case 205 /* WhileStatement */:
-                case 204 /* DoStatement */:
-                    return parent.expression === node;
-                case 206 /* ForStatement */:
-                case 188 /* ConditionalExpression */:
-                    return parent.condition === node;
+        function getTypeAliasForTypeLiteral(type) {
+            if (type.symbol && type.symbol.flags & 2048 /* TypeLiteral */) {
+                var node = ts.findAncestor(type.symbol.declarations[0].parent, function (n) { return n.kind !== 168 /* ParenthesizedType */; });
+                if (node.kind === 231 /* TypeAliasDeclaration */) {
+                    return getSymbolOfNode(node);
+                }
             }
-            return false;
+            return undefined;
         }
-        function isLogicalExpression(node) {
-            while (true) {
-                if (node.kind === 178 /* ParenthesizedExpression */) {
-                    node = node.expression;
+        function isTopLevelInExternalModuleAugmentation(node) {
+            return node && node.parent &&
+                node.parent.kind === 234 /* ModuleBlock */ &&
+                ts.isExternalModuleAugmentation(node.parent.parent);
+        }
+        function literalTypeToString(type) {
+            return type.flags & 32 /* StringLiteral */ ? "\"" + ts.escapeString(type.value) + "\"" : "" + type.value;
+        }
+        function getNameOfSymbol(symbol) {
+            if (symbol.declarations && symbol.declarations.length) {
+                var declaration = symbol.declarations[0];
+                var name_15 = ts.getNameOfDeclaration(declaration);
+                if (name_15) {
+                    return ts.declarationNameToString(name_15);
                 }
-                else if (node.kind === 185 /* PrefixUnaryExpression */ && node.operator === 49 /* ExclamationToken */) {
-                    node = node.operand;
+                if (declaration.parent && declaration.parent.kind === 226 /* VariableDeclaration */) {
+                    return ts.declarationNameToString(declaration.parent.name);
                 }
-                else {
-                    return node.kind === 187 /* BinaryExpression */ && (node.operatorToken.kind === 51 /* AmpersandAmpersandToken */ ||
-                        node.operatorToken.kind === 52 /* BarBarToken */);
+                switch (declaration.kind) {
+                    case 199 /* ClassExpression */:
+                        return "(Anonymous class)";
+                    case 186 /* FunctionExpression */:
+                    case 187 /* ArrowFunction */:
+                        return "(Anonymous function)";
                 }
             }
+            return symbol.name;
         }
-        function isTopLevelLogicalExpression(node) {
-            while (node.parent.kind === 178 /* ParenthesizedExpression */ ||
-                node.parent.kind === 185 /* PrefixUnaryExpression */ &&
-                    node.parent.operator === 49 /* ExclamationToken */) {
-                node = node.parent;
-            }
-            return !isStatementCondition(node) && !isLogicalExpression(node.parent);
-        }
-        function bindCondition(node, trueTarget, falseTarget) {
-            var saveTrueTarget = currentTrueTarget;
-            var saveFalseTarget = currentFalseTarget;
-            currentTrueTarget = trueTarget;
-            currentFalseTarget = falseTarget;
-            bind(node);
-            currentTrueTarget = saveTrueTarget;
-            currentFalseTarget = saveFalseTarget;
-            if (!node || !isLogicalExpression(node)) {
-                addAntecedent(trueTarget, createFlowCondition(32 /* TrueCondition */, currentFlow, node));
-                addAntecedent(falseTarget, createFlowCondition(64 /* FalseCondition */, currentFlow, node));
+        function getSymbolDisplayBuilder() {
+            /**
+             * Writes only the name of the symbol out to the writer. Uses the original source text
+             * for the name of the symbol if it is available to match how the user wrote the name.
+             */
+            function appendSymbolNameOnly(symbol, writer) {
+                writer.writeSymbol(getNameOfSymbol(symbol), symbol);
             }
-        }
-        function bindIterativeStatement(node, breakTarget, continueTarget) {
-            var saveBreakTarget = currentBreakTarget;
-            var saveContinueTarget = currentContinueTarget;
-            currentBreakTarget = breakTarget;
-            currentContinueTarget = continueTarget;
-            bind(node);
-            currentBreakTarget = saveBreakTarget;
-            currentContinueTarget = saveContinueTarget;
-        }
-        function bindWhileStatement(node) {
-            var preWhileLabel = createLoopLabel();
-            var preBodyLabel = createBranchLabel();
-            var postWhileLabel = createBranchLabel();
-            addAntecedent(preWhileLabel, currentFlow);
-            currentFlow = preWhileLabel;
-            bindCondition(node.expression, preBodyLabel, postWhileLabel);
-            currentFlow = finishFlowLabel(preBodyLabel);
-            bindIterativeStatement(node.statement, postWhileLabel, preWhileLabel);
-            addAntecedent(preWhileLabel, currentFlow);
-            currentFlow = finishFlowLabel(postWhileLabel);
-        }
-        function bindDoStatement(node) {
-            var preDoLabel = createLoopLabel();
-            var preConditionLabel = createBranchLabel();
-            var postDoLabel = createBranchLabel();
-            addAntecedent(preDoLabel, currentFlow);
-            currentFlow = preDoLabel;
-            bindIterativeStatement(node.statement, postDoLabel, preConditionLabel);
-            addAntecedent(preConditionLabel, currentFlow);
-            currentFlow = finishFlowLabel(preConditionLabel);
-            bindCondition(node.expression, preDoLabel, postDoLabel);
-            currentFlow = finishFlowLabel(postDoLabel);
-        }
-        function bindForStatement(node) {
-            var preLoopLabel = createLoopLabel();
-            var preBodyLabel = createBranchLabel();
-            var postLoopLabel = createBranchLabel();
-            bind(node.initializer);
-            addAntecedent(preLoopLabel, currentFlow);
-            currentFlow = preLoopLabel;
-            bindCondition(node.condition, preBodyLabel, postLoopLabel);
-            currentFlow = finishFlowLabel(preBodyLabel);
-            bindIterativeStatement(node.statement, postLoopLabel, preLoopLabel);
-            bind(node.incrementor);
-            addAntecedent(preLoopLabel, currentFlow);
-            currentFlow = finishFlowLabel(postLoopLabel);
-        }
-        function bindForInOrForOfStatement(node) {
-            var preLoopLabel = createLoopLabel();
-            var postLoopLabel = createBranchLabel();
-            addAntecedent(preLoopLabel, currentFlow);
-            currentFlow = preLoopLabel;
-            bind(node.expression);
-            addAntecedent(postLoopLabel, currentFlow);
-            bind(node.initializer);
-            if (node.initializer.kind !== 219 /* VariableDeclarationList */) {
-                bindAssignmentTargetFlow(node.initializer);
+            /**
+             * Writes a property access or element access with the name of the symbol out to the writer.
+             * Uses the original source text for the name of the symbol if it is available to match how the user wrote the name,
+             * ensuring that any names written with literals use element accesses.
+             */
+            function appendPropertyOrElementAccessForSymbol(symbol, writer) {
+                var symbolName = getNameOfSymbol(symbol);
+                var firstChar = symbolName.charCodeAt(0);
+                var needsElementAccess = !ts.isIdentifierStart(firstChar, languageVersion);
+                if (needsElementAccess) {
+                    writePunctuation(writer, 21 /* OpenBracketToken */);
+                    if (ts.isSingleOrDoubleQuote(firstChar)) {
+                        writer.writeStringLiteral(symbolName);
+                    }
+                    else {
+                        writer.writeSymbol(symbolName, symbol);
+                    }
+                    writePunctuation(writer, 22 /* CloseBracketToken */);
+                }
+                else {
+                    writePunctuation(writer, 23 /* DotToken */);
+                    writer.writeSymbol(symbolName, symbol);
+                }
             }
-            bindIterativeStatement(node.statement, postLoopLabel, preLoopLabel);
-            addAntecedent(preLoopLabel, currentFlow);
-            currentFlow = finishFlowLabel(postLoopLabel);
-        }
-        function bindIfStatement(node) {
-            var thenLabel = createBranchLabel();
-            var elseLabel = createBranchLabel();
-            var postIfLabel = createBranchLabel();
-            bindCondition(node.expression, thenLabel, elseLabel);
-            currentFlow = finishFlowLabel(thenLabel);
-            bind(node.thenStatement);
-            addAntecedent(postIfLabel, currentFlow);
-            currentFlow = finishFlowLabel(elseLabel);
-            bind(node.elseStatement);
-            addAntecedent(postIfLabel, currentFlow);
-            currentFlow = finishFlowLabel(postIfLabel);
-        }
-        function bindReturnOrThrow(node) {
-            bind(node.expression);
-            if (node.kind === 211 /* ReturnStatement */) {
-                hasExplicitReturn = true;
-                if (currentReturnTarget) {
-                    addAntecedent(currentReturnTarget, currentFlow);
+            /**
+             * Enclosing declaration is optional when we don't want to get qualified name in the enclosing declaration scope
+             * Meaning needs to be specified if the enclosing declaration is given
+             */
+            function buildSymbolDisplay(symbol, writer, enclosingDeclaration, meaning, flags, typeFlags) {
+                var parentSymbol;
+                function appendParentTypeArgumentsAndSymbolName(symbol) {
+                    if (parentSymbol) {
+                        // Write type arguments of instantiated class/interface here
+                        if (flags & 1 /* WriteTypeParametersOrArguments */) {
+                            if (ts.getCheckFlags(symbol) & 1 /* Instantiated */) {
+                                var params = getTypeParametersOfClassOrInterface(parentSymbol.flags & 8388608 /* Alias */ ? resolveAlias(parentSymbol) : parentSymbol);
+                                buildDisplayForTypeArgumentsAndDelimiters(params, symbol.mapper, writer, enclosingDeclaration);
+                            }
+                            else {
+                                buildTypeParameterDisplayFromSymbol(parentSymbol, writer, enclosingDeclaration);
+                            }
+                        }
+                        appendPropertyOrElementAccessForSymbol(symbol, writer);
+                    }
+                    else {
+                        appendSymbolNameOnly(symbol, writer);
+                    }
+                    parentSymbol = symbol;
+                }
+                // Let the writer know we just wrote out a symbol.  The declaration emitter writer uses
+                // this to determine if an import it has previously seen (and not written out) needs
+                // to be written to the file once the walk of the tree is complete.
+                //
+                // NOTE(cyrusn): This approach feels somewhat unfortunate.  A simple pass over the tree
+                // up front (for example, during checking) could determine if we need to emit the imports
+                // and we could then access that data during declaration emit.
+                writer.trackSymbol(symbol, enclosingDeclaration, meaning);
+                /** @param endOfChain Set to false for recursive calls; non-recursive calls should always output something. */
+                function walkSymbol(symbol, meaning, endOfChain) {
+                    var accessibleSymbolChain = getAccessibleSymbolChain(symbol, enclosingDeclaration, meaning, !!(flags & 2 /* UseOnlyExternalAliasing */));
+                    if (!accessibleSymbolChain ||
+                        needsQualification(accessibleSymbolChain[0], enclosingDeclaration, accessibleSymbolChain.length === 1 ? meaning : getQualifiedLeftMeaning(meaning))) {
+                        // Go up and add our parent.
+                        var parent_8 = getParentOfSymbol(accessibleSymbolChain ? accessibleSymbolChain[0] : symbol);
+                        if (parent_8) {
+                            walkSymbol(parent_8, getQualifiedLeftMeaning(meaning), /*endOfChain*/ false);
+                        }
+                    }
+                    if (accessibleSymbolChain) {
+                        for (var _i = 0, accessibleSymbolChain_1 = accessibleSymbolChain; _i < accessibleSymbolChain_1.length; _i++) {
+                            var accessibleSymbol = accessibleSymbolChain_1[_i];
+                            appendParentTypeArgumentsAndSymbolName(accessibleSymbol);
+                        }
+                    }
+                    else if (
+                    // If this is the last part of outputting the symbol, always output. The cases apply only to parent symbols.
+                    endOfChain ||
+                        // If a parent symbol is an external module, don't write it. (We prefer just `x` vs `"foo/bar".x`.)
+                        !(!parentSymbol && ts.forEach(symbol.declarations, hasExternalModuleSymbol)) &&
+                            // If a parent symbol is an anonymous type, don't write it.
+                            !(symbol.flags & (2048 /* TypeLiteral */ | 4096 /* ObjectLiteral */))) {
+                        appendParentTypeArgumentsAndSymbolName(symbol);
+                    }
+                }
+                // Get qualified name if the symbol is not a type parameter
+                // and there is an enclosing declaration or we specifically
+                // asked for it
+                var isTypeParameter = symbol.flags & 262144 /* TypeParameter */;
+                var typeFormatFlag = 256 /* UseFullyQualifiedType */ & typeFlags;
+                if (!isTypeParameter && (enclosingDeclaration || typeFormatFlag)) {
+                    walkSymbol(symbol, meaning, /*endOfChain*/ true);
+                }
+                else {
+                    appendParentTypeArgumentsAndSymbolName(symbol);
                 }
             }
-            currentFlow = unreachableFlow;
-        }
-        function findActiveLabel(name) {
-            if (activeLabels) {
-                for (var _i = 0, activeLabels_1 = activeLabels; _i < activeLabels_1.length; _i++) {
-                    var label = activeLabels_1[_i];
-                    if (label.name === name) {
-                        return label;
+            function buildTypeDisplay(type, writer, enclosingDeclaration, globalFlags, symbolStack) {
+                var globalFlagsToPass = globalFlags & (32 /* WriteOwnNameForAnyLike */ | 16384 /* WriteClassExpressionAsTypeLiteral */);
+                var inObjectTypeLiteral = false;
+                return writeType(type, globalFlags);
+                function writeType(type, flags) {
+                    var nextFlags = flags & ~1024 /* InTypeAlias */;
+                    // Write undefined/null type as any
+                    if (type.flags & 16793231 /* Intrinsic */) {
+                        // Special handling for unknown / resolving types, they should show up as any and not unknown or __resolving
+                        writer.writeKeyword(!(globalFlags & 32 /* WriteOwnNameForAnyLike */) && isTypeAny(type)
+                            ? "any"
+                            : type.intrinsicName);
+                    }
+                    else if (type.flags & 16384 /* TypeParameter */ && type.isThisType) {
+                        if (inObjectTypeLiteral) {
+                            writer.reportInaccessibleThisError();
+                        }
+                        writer.writeKeyword("this");
+                    }
+                    else if (getObjectFlags(type) & 4 /* Reference */) {
+                        writeTypeReference(type, nextFlags);
+                    }
+                    else if (type.flags & 256 /* EnumLiteral */ && !(type.flags & 65536 /* Union */)) {
+                        var parent_9 = getParentOfSymbol(type.symbol);
+                        buildSymbolDisplay(parent_9, writer, enclosingDeclaration, 793064 /* Type */, 0 /* None */, nextFlags);
+                        // In a literal enum type with a single member E { A }, E and E.A denote the
+                        // same type. We always display this type simply as E.
+                        if (getDeclaredTypeOfSymbol(parent_9) !== type) {
+                            writePunctuation(writer, 23 /* DotToken */);
+                            appendSymbolNameOnly(type.symbol, writer);
+                        }
+                    }
+                    else if (getObjectFlags(type) & 3 /* ClassOrInterface */ || type.flags & (272 /* EnumLike */ | 16384 /* TypeParameter */)) {
+                        // The specified symbol flags need to be reinterpreted as type flags
+                        buildSymbolDisplay(type.symbol, writer, enclosingDeclaration, 793064 /* Type */, 0 /* None */, nextFlags);
+                    }
+                    else if (!(flags & 1024 /* InTypeAlias */) && type.aliasSymbol &&
+                        isSymbolAccessible(type.aliasSymbol, enclosingDeclaration, 793064 /* Type */, /*shouldComputeAliasesToMakeVisible*/ false).accessibility === 0 /* Accessible */) {
+                        var typeArguments = type.aliasTypeArguments;
+                        writeSymbolTypeReference(type.aliasSymbol, typeArguments, 0, ts.length(typeArguments), nextFlags);
+                    }
+                    else if (type.flags & 196608 /* UnionOrIntersection */) {
+                        writeUnionOrIntersectionType(type, nextFlags);
+                    }
+                    else if (getObjectFlags(type) & (16 /* Anonymous */ | 32 /* Mapped */)) {
+                        writeAnonymousType(type, nextFlags);
+                    }
+                    else if (type.flags & 96 /* StringOrNumberLiteral */) {
+                        writer.writeStringLiteral(literalTypeToString(type));
+                    }
+                    else if (type.flags & 262144 /* Index */) {
+                        if (flags & 128 /* InElementType */) {
+                            writePunctuation(writer, 19 /* OpenParenToken */);
+                        }
+                        writer.writeKeyword("keyof");
+                        writeSpace(writer);
+                        writeType(type.type, 128 /* InElementType */);
+                        if (flags & 128 /* InElementType */) {
+                            writePunctuation(writer, 20 /* CloseParenToken */);
+                        }
+                    }
+                    else if (type.flags & 524288 /* IndexedAccess */) {
+                        writeType(type.objectType, 128 /* InElementType */);
+                        writePunctuation(writer, 21 /* OpenBracketToken */);
+                        writeType(type.indexType, 0 /* None */);
+                        writePunctuation(writer, 22 /* CloseBracketToken */);
+                    }
+                    else {
+                        // Should never get here
+                        // { ... }
+                        writePunctuation(writer, 17 /* OpenBraceToken */);
+                        writeSpace(writer);
+                        writePunctuation(writer, 24 /* DotDotDotToken */);
+                        writeSpace(writer);
+                        writePunctuation(writer, 18 /* CloseBraceToken */);
+                    }
+                }
+                function writeTypeList(types, delimiter) {
+                    for (var i = 0; i < types.length; i++) {
+                        if (i > 0) {
+                            if (delimiter !== 26 /* CommaToken */) {
+                                writeSpace(writer);
+                            }
+                            writePunctuation(writer, delimiter);
+                            writeSpace(writer);
+                        }
+                        writeType(types[i], delimiter === 26 /* CommaToken */ ? 0 /* None */ : 128 /* InElementType */);
+                    }
+                }
+                function writeSymbolTypeReference(symbol, typeArguments, pos, end, flags) {
+                    // Unnamed function expressions and arrow functions have reserved names that we don't want to display
+                    if (symbol.flags & 32 /* Class */ || !isReservedMemberName(symbol.name)) {
+                        buildSymbolDisplay(symbol, writer, enclosingDeclaration, 793064 /* Type */, 0 /* None */, flags);
+                    }
+                    if (pos < end) {
+                        writePunctuation(writer, 27 /* LessThanToken */);
+                        writeType(typeArguments[pos], 512 /* InFirstTypeArgument */);
+                        pos++;
+                        while (pos < end) {
+                            writePunctuation(writer, 26 /* CommaToken */);
+                            writeSpace(writer);
+                            writeType(typeArguments[pos], 0 /* None */);
+                            pos++;
+                        }
+                        writePunctuation(writer, 29 /* GreaterThanToken */);
+                    }
+                }
+                function writeTypeReference(type, flags) {
+                    var typeArguments = type.typeArguments || emptyArray;
+                    if (type.target === globalArrayType && !(flags & 1 /* WriteArrayAsGenericType */)) {
+                        writeType(typeArguments[0], 128 /* InElementType */);
+                        writePunctuation(writer, 21 /* OpenBracketToken */);
+                        writePunctuation(writer, 22 /* CloseBracketToken */);
+                    }
+                    else if (type.target.objectFlags & 8 /* Tuple */) {
+                        writePunctuation(writer, 21 /* OpenBracketToken */);
+                        writeTypeList(type.typeArguments.slice(0, getTypeReferenceArity(type)), 26 /* CommaToken */);
+                        writePunctuation(writer, 22 /* CloseBracketToken */);
+                    }
+                    else if (flags & 16384 /* WriteClassExpressionAsTypeLiteral */ &&
+                        type.symbol.valueDeclaration &&
+                        type.symbol.valueDeclaration.kind === 199 /* ClassExpression */) {
+                        writeAnonymousType(getDeclaredTypeOfClassOrInterface(type.symbol), flags);
+                    }
+                    else {
+                        // Write the type reference in the format f<A>.g<B>.C<X, Y> where A and B are type arguments
+                        // for outer type parameters, and f and g are the respective declaring containers of those
+                        // type parameters.
+                        var outerTypeParameters = type.target.outerTypeParameters;
+                        var i = 0;
+                        if (outerTypeParameters) {
+                            var length_2 = outerTypeParameters.length;
+                            while (i < length_2) {
+                                // Find group of type arguments for type parameters with the same declaring container.
+                                var start = i;
+                                var parent_10 = getParentSymbolOfTypeParameter(outerTypeParameters[i]);
+                                do {
+                                    i++;
+                                } while (i < length_2 && getParentSymbolOfTypeParameter(outerTypeParameters[i]) === parent_10);
+                                // When type parameters are their own type arguments for the whole group (i.e. we have
+                                // the default outer type arguments), we don't show the group.
+                                if (!ts.rangeEquals(outerTypeParameters, typeArguments, start, i)) {
+                                    writeSymbolTypeReference(parent_10, typeArguments, start, i, flags);
+                                    writePunctuation(writer, 23 /* DotToken */);
+                                }
+                            }
+                        }
+                        var typeParameterCount = (type.target.typeParameters || emptyArray).length;
+                        writeSymbolTypeReference(type.symbol, typeArguments, i, typeParameterCount, flags);
+                    }
+                }
+                function writeUnionOrIntersectionType(type, flags) {
+                    if (flags & 128 /* InElementType */) {
+                        writePunctuation(writer, 19 /* OpenParenToken */);
+                    }
+                    if (type.flags & 65536 /* Union */) {
+                        writeTypeList(formatUnionTypes(type.types), 49 /* BarToken */);
+                    }
+                    else {
+                        writeTypeList(type.types, 48 /* AmpersandToken */);
+                    }
+                    if (flags & 128 /* InElementType */) {
+                        writePunctuation(writer, 20 /* CloseParenToken */);
+                    }
+                }
+                function writeAnonymousType(type, flags) {
+                    var symbol = type.symbol;
+                    if (symbol) {
+                        // Always use 'typeof T' for type of class, enum, and module objects
+                        if (symbol.flags & 32 /* Class */ &&
+                            !getBaseTypeVariableOfClass(symbol) &&
+                            !(symbol.valueDeclaration.kind === 199 /* ClassExpression */ && flags & 16384 /* WriteClassExpressionAsTypeLiteral */) ||
+                            symbol.flags & (384 /* Enum */ | 512 /* ValueModule */)) {
+                            writeTypeOfSymbol(type, flags);
+                        }
+                        else if (shouldWriteTypeOfFunctionSymbol()) {
+                            writeTypeOfSymbol(type, flags);
+                        }
+                        else if (ts.contains(symbolStack, symbol)) {
+                            // If type is an anonymous type literal in a type alias declaration, use type alias name
+                            var typeAlias = getTypeAliasForTypeLiteral(type);
+                            if (typeAlias) {
+                                // The specified symbol flags need to be reinterpreted as type flags
+                                buildSymbolDisplay(typeAlias, writer, enclosingDeclaration, 793064 /* Type */, 0 /* None */, flags);
+                            }
+                            else {
+                                // Recursive usage, use any
+                                writeKeyword(writer, 119 /* AnyKeyword */);
+                            }
+                        }
+                        else {
+                            // Since instantiations of the same anonymous type have the same symbol, tracking symbols instead
+                            // of types allows us to catch circular references to instantiations of the same anonymous type
+                            // However, in case of class expressions, we want to write both the static side and the instance side.
+                            // We skip adding the static side so that the instance side has a chance to be written
+                            // before checking for circular references.
+                            if (!symbolStack) {
+                                symbolStack = [];
+                            }
+                            var isConstructorObject = type.flags & 32768 /* Object */ &&
+                                getObjectFlags(type) & 16 /* Anonymous */ &&
+                                type.symbol && type.symbol.flags & 32 /* Class */;
+                            if (isConstructorObject) {
+                                writeLiteralType(type, flags);
+                            }
+                            else {
+                                symbolStack.push(symbol);
+                                writeLiteralType(type, flags);
+                                symbolStack.pop();
+                            }
+                        }
+                    }
+                    else {
+                        // Anonymous types with no symbol are never circular
+                        writeLiteralType(type, flags);
+                    }
+                    function shouldWriteTypeOfFunctionSymbol() {
+                        var isStaticMethodSymbol = !!(symbol.flags & 8192 /* Method */ &&
+                            ts.forEach(symbol.declarations, function (declaration) { return ts.getModifierFlags(declaration) & 32 /* Static */; }));
+                        var isNonLocalFunctionSymbol = !!(symbol.flags & 16 /* Function */) &&
+                            (symbol.parent ||
+                                ts.forEach(symbol.declarations, function (declaration) {
+                                    return declaration.parent.kind === 265 /* SourceFile */ || declaration.parent.kind === 234 /* ModuleBlock */;
+                                }));
+                        if (isStaticMethodSymbol || isNonLocalFunctionSymbol) {
+                            // typeof is allowed only for static/non local functions
+                            return !!(flags & 4 /* UseTypeOfFunction */) ||
+                                (ts.contains(symbolStack, symbol)); // it is type of the symbol uses itself recursively
+                        }
+                    }
+                }
+                function writeTypeOfSymbol(type, typeFormatFlags) {
+                    writeKeyword(writer, 103 /* TypeOfKeyword */);
+                    writeSpace(writer);
+                    buildSymbolDisplay(type.symbol, writer, enclosingDeclaration, 107455 /* Value */, 0 /* None */, typeFormatFlags);
+                }
+                function writePropertyWithModifiers(prop) {
+                    if (isReadonlySymbol(prop)) {
+                        writeKeyword(writer, 131 /* ReadonlyKeyword */);
+                        writeSpace(writer);
+                    }
+                    buildSymbolDisplay(prop, writer);
+                    if (prop.flags & 67108864 /* Optional */) {
+                        writePunctuation(writer, 55 /* QuestionToken */);
+                    }
+                }
+                function shouldAddParenthesisAroundFunctionType(callSignature, flags) {
+                    if (flags & 128 /* InElementType */) {
+                        return true;
+                    }
+                    else if (flags & 512 /* InFirstTypeArgument */) {
+                        // Add parenthesis around function type for the first type argument to avoid ambiguity
+                        var typeParameters = callSignature.target && (flags & 64 /* WriteTypeArgumentsOfSignature */) ?
+                            callSignature.target.typeParameters : callSignature.typeParameters;
+                        return typeParameters && typeParameters.length !== 0;
+                    }
+                    return false;
+                }
+                function writeLiteralType(type, flags) {
+                    if (type.objectFlags & 32 /* Mapped */) {
+                        if (getConstraintTypeFromMappedType(type).flags & (16384 /* TypeParameter */ | 262144 /* Index */)) {
+                            writeMappedType(type);
+                            return;
+                        }
+                    }
+                    var resolved = resolveStructuredTypeMembers(type);
+                    if (!resolved.properties.length && !resolved.stringIndexInfo && !resolved.numberIndexInfo) {
+                        if (!resolved.callSignatures.length && !resolved.constructSignatures.length) {
+                            writePunctuation(writer, 17 /* OpenBraceToken */);
+                            writePunctuation(writer, 18 /* CloseBraceToken */);
+                            return;
+                        }
+                        if (resolved.callSignatures.length === 1 && !resolved.constructSignatures.length) {
+                            var parenthesizeSignature = shouldAddParenthesisAroundFunctionType(resolved.callSignatures[0], flags);
+                            if (parenthesizeSignature) {
+                                writePunctuation(writer, 19 /* OpenParenToken */);
+                            }
+                            buildSignatureDisplay(resolved.callSignatures[0], writer, enclosingDeclaration, globalFlagsToPass | 16 /* WriteArrowStyleSignature */, /*kind*/ undefined, symbolStack);
+                            if (parenthesizeSignature) {
+                                writePunctuation(writer, 20 /* CloseParenToken */);
+                            }
+                            return;
+                        }
+                        if (resolved.constructSignatures.length === 1 && !resolved.callSignatures.length) {
+                            if (flags & 128 /* InElementType */) {
+                                writePunctuation(writer, 19 /* OpenParenToken */);
+                            }
+                            writeKeyword(writer, 94 /* NewKeyword */);
+                            writeSpace(writer);
+                            buildSignatureDisplay(resolved.constructSignatures[0], writer, enclosingDeclaration, globalFlagsToPass | 16 /* WriteArrowStyleSignature */, /*kind*/ undefined, symbolStack);
+                            if (flags & 128 /* InElementType */) {
+                                writePunctuation(writer, 20 /* CloseParenToken */);
+                            }
+                            return;
+                        }
+                    }
+                    var saveInObjectTypeLiteral = inObjectTypeLiteral;
+                    inObjectTypeLiteral = true;
+                    writePunctuation(writer, 17 /* OpenBraceToken */);
+                    writer.writeLine();
+                    writer.increaseIndent();
+                    writeObjectLiteralType(resolved);
+                    writer.decreaseIndent();
+                    writePunctuation(writer, 18 /* CloseBraceToken */);
+                    inObjectTypeLiteral = saveInObjectTypeLiteral;
+                }
+                function writeObjectLiteralType(resolved) {
+                    for (var _i = 0, _a = resolved.callSignatures; _i < _a.length; _i++) {
+                        var signature = _a[_i];
+                        buildSignatureDisplay(signature, writer, enclosingDeclaration, globalFlagsToPass, /*kind*/ undefined, symbolStack);
+                        writePunctuation(writer, 25 /* SemicolonToken */);
+                        writer.writeLine();
+                    }
+                    for (var _b = 0, _c = resolved.constructSignatures; _b < _c.length; _b++) {
+                        var signature = _c[_b];
+                        buildSignatureDisplay(signature, writer, enclosingDeclaration, globalFlagsToPass, 1 /* Construct */, symbolStack);
+                        writePunctuation(writer, 25 /* SemicolonToken */);
+                        writer.writeLine();
+                    }
+                    buildIndexSignatureDisplay(resolved.stringIndexInfo, writer, 0 /* String */, enclosingDeclaration, globalFlags, symbolStack);
+                    buildIndexSignatureDisplay(resolved.numberIndexInfo, writer, 1 /* Number */, enclosingDeclaration, globalFlags, symbolStack);
+                    for (var _d = 0, _e = resolved.properties; _d < _e.length; _d++) {
+                        var p = _e[_d];
+                        if (globalFlags & 16384 /* WriteClassExpressionAsTypeLiteral */) {
+                            if (p.flags & 16777216 /* Prototype */) {
+                                continue;
+                            }
+                            if (ts.getDeclarationModifierFlagsFromSymbol(p) & (8 /* Private */ | 16 /* Protected */)) {
+                                writer.reportPrivateInBaseOfClassExpression(p.name);
+                            }
+                        }
+                        var t = getTypeOfSymbol(p);
+                        if (p.flags & (16 /* Function */ | 8192 /* Method */) && !getPropertiesOfObjectType(t).length) {
+                            var signatures = getSignaturesOfType(t, 0 /* Call */);
+                            for (var _f = 0, signatures_2 = signatures; _f < signatures_2.length; _f++) {
+                                var signature = signatures_2[_f];
+                                writePropertyWithModifiers(p);
+                                buildSignatureDisplay(signature, writer, enclosingDeclaration, globalFlagsToPass, /*kind*/ undefined, symbolStack);
+                                writePunctuation(writer, 25 /* SemicolonToken */);
+                                writer.writeLine();
+                            }
+                        }
+                        else {
+                            writePropertyWithModifiers(p);
+                            writePunctuation(writer, 56 /* ColonToken */);
+                            writeSpace(writer);
+                            writeType(t, globalFlags & 16384 /* WriteClassExpressionAsTypeLiteral */);
+                            writePunctuation(writer, 25 /* SemicolonToken */);
+                            writer.writeLine();
+                        }
                     }
                 }
-            }
-            return undefined;
-        }
-        function bindbreakOrContinueFlow(node, breakTarget, continueTarget) {
-            var flowLabel = node.kind === 210 /* BreakStatement */ ? breakTarget : continueTarget;
-            if (flowLabel) {
-                addAntecedent(flowLabel, currentFlow);
-                currentFlow = unreachableFlow;
-            }
-        }
-        function bindBreakOrContinueStatement(node) {
-            bind(node.label);
-            if (node.label) {
-                var activeLabel = findActiveLabel(node.label.text);
-                if (activeLabel) {
-                    activeLabel.referenced = true;
-                    bindbreakOrContinueFlow(node, activeLabel.breakTarget, activeLabel.continueTarget);
+                function writeMappedType(type) {
+                    writePunctuation(writer, 17 /* OpenBraceToken */);
+                    writer.writeLine();
+                    writer.increaseIndent();
+                    if (type.declaration.readonlyToken) {
+                        writeKeyword(writer, 131 /* ReadonlyKeyword */);
+                        writeSpace(writer);
+                    }
+                    writePunctuation(writer, 21 /* OpenBracketToken */);
+                    appendSymbolNameOnly(getTypeParameterFromMappedType(type).symbol, writer);
+                    writeSpace(writer);
+                    writeKeyword(writer, 92 /* InKeyword */);
+                    writeSpace(writer);
+                    writeType(getConstraintTypeFromMappedType(type), 0 /* None */);
+                    writePunctuation(writer, 22 /* CloseBracketToken */);
+                    if (type.declaration.questionToken) {
+                        writePunctuation(writer, 55 /* QuestionToken */);
+                    }
+                    writePunctuation(writer, 56 /* ColonToken */);
+                    writeSpace(writer);
+                    writeType(getTemplateTypeFromMappedType(type), 0 /* None */);
+                    writePunctuation(writer, 25 /* SemicolonToken */);
+                    writer.writeLine();
+                    writer.decreaseIndent();
+                    writePunctuation(writer, 18 /* CloseBraceToken */);
                 }
             }
-            else {
-                bindbreakOrContinueFlow(node, currentBreakTarget, currentContinueTarget);
-            }
-        }
-        function bindTryStatement(node) {
-            var postFinallyLabel = createBranchLabel();
-            var preTryFlow = currentFlow;
-            // TODO: Every statement in try block is potentially an exit point!
-            bind(node.tryBlock);
-            addAntecedent(postFinallyLabel, currentFlow);
-            if (node.catchClause) {
-                currentFlow = preTryFlow;
-                bind(node.catchClause);
-                addAntecedent(postFinallyLabel, currentFlow);
-            }
-            if (node.finallyBlock) {
-                currentFlow = preTryFlow;
-                bind(node.finallyBlock);
-            }
-            currentFlow = finishFlowLabel(postFinallyLabel);
-        }
-        function bindSwitchStatement(node) {
-            var postSwitchLabel = createBranchLabel();
-            bind(node.expression);
-            var saveBreakTarget = currentBreakTarget;
-            var savePreSwitchCaseFlow = preSwitchCaseFlow;
-            currentBreakTarget = postSwitchLabel;
-            preSwitchCaseFlow = currentFlow;
-            bind(node.caseBlock);
-            addAntecedent(postSwitchLabel, currentFlow);
-            var hasDefault = ts.forEach(node.caseBlock.clauses, function (c) { return c.kind === 250 /* DefaultClause */; });
-            // We mark a switch statement as possibly exhaustive if it has no default clause and if all
-            // case clauses have unreachable end points (e.g. they all return).
-            node.possiblyExhaustive = !hasDefault && !postSwitchLabel.antecedents;
-            if (!hasDefault) {
-                addAntecedent(postSwitchLabel, createFlowSwitchClause(preSwitchCaseFlow, node, 0, 0));
+            function buildTypeParameterDisplayFromSymbol(symbol, writer, enclosingDeclaration, flags) {
+                var targetSymbol = getTargetSymbol(symbol);
+                if (targetSymbol.flags & 32 /* Class */ || targetSymbol.flags & 64 /* Interface */ || targetSymbol.flags & 524288 /* TypeAlias */) {
+                    buildDisplayForTypeParametersAndDelimiters(getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol), writer, enclosingDeclaration, flags);
+                }
             }
-            currentBreakTarget = saveBreakTarget;
-            preSwitchCaseFlow = savePreSwitchCaseFlow;
-            currentFlow = finishFlowLabel(postSwitchLabel);
-        }
-        function bindCaseBlock(node) {
-            var clauses = node.clauses;
-            var fallthroughFlow = unreachableFlow;
-            for (var i = 0; i < clauses.length; i++) {
-                var clauseStart = i;
-                while (!clauses[i].statements.length && i + 1 < clauses.length) {
-                    bind(clauses[i]);
-                    i++;
+            function buildTypeParameterDisplay(tp, writer, enclosingDeclaration, flags, symbolStack) {
+                appendSymbolNameOnly(tp.symbol, writer);
+                var constraint = getConstraintOfTypeParameter(tp);
+                if (constraint) {
+                    writeSpace(writer);
+                    writeKeyword(writer, 85 /* ExtendsKeyword */);
+                    writeSpace(writer);
+                    buildTypeDisplay(constraint, writer, enclosingDeclaration, flags, symbolStack);
                 }
-                var preCaseLabel = createBranchLabel();
-                addAntecedent(preCaseLabel, createFlowSwitchClause(preSwitchCaseFlow, node.parent, clauseStart, i + 1));
-                addAntecedent(preCaseLabel, fallthroughFlow);
-                currentFlow = finishFlowLabel(preCaseLabel);
-                var clause = clauses[i];
-                bind(clause);
-                fallthroughFlow = currentFlow;
-                if (!(currentFlow.flags & 1 /* Unreachable */) && i !== clauses.length - 1 && options.noFallthroughCasesInSwitch) {
-                    errorOnFirstToken(clause, ts.Diagnostics.Fallthrough_case_in_switch);
+                var defaultType = getDefaultFromTypeParameter(tp);
+                if (defaultType) {
+                    writeSpace(writer);
+                    writePunctuation(writer, 58 /* EqualsToken */);
+                    writeSpace(writer);
+                    buildTypeDisplay(defaultType, writer, enclosingDeclaration, flags, symbolStack);
                 }
             }
-        }
-        function bindCaseClause(node) {
-            var saveCurrentFlow = currentFlow;
-            currentFlow = preSwitchCaseFlow;
-            bind(node.expression);
-            currentFlow = saveCurrentFlow;
-            ts.forEach(node.statements, bind);
-        }
-        function pushActiveLabel(name, breakTarget, continueTarget) {
-            var activeLabel = {
-                name: name,
-                breakTarget: breakTarget,
-                continueTarget: continueTarget,
-                referenced: false
-            };
-            (activeLabels || (activeLabels = [])).push(activeLabel);
-            return activeLabel;
-        }
-        function popActiveLabel() {
-            activeLabels.pop();
-        }
-        function bindLabeledStatement(node) {
-            var preStatementLabel = createLoopLabel();
-            var postStatementLabel = createBranchLabel();
-            bind(node.label);
-            addAntecedent(preStatementLabel, currentFlow);
-            var activeLabel = pushActiveLabel(node.label.text, postStatementLabel, preStatementLabel);
-            bind(node.statement);
-            popActiveLabel();
-            if (!activeLabel.referenced && !options.allowUnusedLabels) {
-                file.bindDiagnostics.push(ts.createDiagnosticForNode(node.label, ts.Diagnostics.Unused_label));
+            function buildParameterDisplay(p, writer, enclosingDeclaration, flags, symbolStack) {
+                var parameterNode = p.valueDeclaration;
+                if (parameterNode ? ts.isRestParameter(parameterNode) : isTransientSymbol(p) && p.isRestParameter) {
+                    writePunctuation(writer, 24 /* DotDotDotToken */);
+                }
+                if (parameterNode && ts.isBindingPattern(parameterNode.name)) {
+                    buildBindingPatternDisplay(parameterNode.name, writer, enclosingDeclaration, flags, symbolStack);
+                }
+                else {
+                    appendSymbolNameOnly(p, writer);
+                }
+                if (parameterNode && isOptionalParameter(parameterNode)) {
+                    writePunctuation(writer, 55 /* QuestionToken */);
+                }
+                writePunctuation(writer, 56 /* ColonToken */);
+                writeSpace(writer);
+                var type = getTypeOfSymbol(p);
+                if (parameterNode && isRequiredInitializedParameter(parameterNode)) {
+                    type = getNullableType(type, 2048 /* Undefined */);
+                }
+                buildTypeDisplay(type, writer, enclosingDeclaration, flags, symbolStack);
             }
-            addAntecedent(postStatementLabel, currentFlow);
-            currentFlow = finishFlowLabel(postStatementLabel);
-        }
-        function bindDestructuringTargetFlow(node) {
-            if (node.kind === 187 /* BinaryExpression */ && node.operatorToken.kind === 56 /* EqualsToken */) {
-                bindAssignmentTargetFlow(node.left);
+            function buildBindingPatternDisplay(bindingPattern, writer, enclosingDeclaration, flags, symbolStack) {
+                // We have to explicitly emit square bracket and bracket because these tokens are not stored inside the node.
+                if (bindingPattern.kind === 174 /* ObjectBindingPattern */) {
+                    writePunctuation(writer, 17 /* OpenBraceToken */);
+                    buildDisplayForCommaSeparatedList(bindingPattern.elements, writer, function (e) { return buildBindingElementDisplay(e, writer, enclosingDeclaration, flags, symbolStack); });
+                    writePunctuation(writer, 18 /* CloseBraceToken */);
+                }
+                else if (bindingPattern.kind === 175 /* ArrayBindingPattern */) {
+                    writePunctuation(writer, 21 /* OpenBracketToken */);
+                    var elements = bindingPattern.elements;
+                    buildDisplayForCommaSeparatedList(elements, writer, function (e) { return buildBindingElementDisplay(e, writer, enclosingDeclaration, flags, symbolStack); });
+                    if (elements && elements.hasTrailingComma) {
+                        writePunctuation(writer, 26 /* CommaToken */);
+                    }
+                    writePunctuation(writer, 22 /* CloseBracketToken */);
+                }
             }
-            else {
-                bindAssignmentTargetFlow(node);
+            function buildBindingElementDisplay(bindingElement, writer, enclosingDeclaration, flags, symbolStack) {
+                if (ts.isOmittedExpression(bindingElement)) {
+                    return;
+                }
+                ts.Debug.assert(bindingElement.kind === 176 /* BindingElement */);
+                if (bindingElement.propertyName) {
+                    writer.writeProperty(ts.getTextOfNode(bindingElement.propertyName));
+                    writePunctuation(writer, 56 /* ColonToken */);
+                    writeSpace(writer);
+                }
+                if (ts.isBindingPattern(bindingElement.name)) {
+                    buildBindingPatternDisplay(bindingElement.name, writer, enclosingDeclaration, flags, symbolStack);
+                }
+                else {
+                    if (bindingElement.dotDotDotToken) {
+                        writePunctuation(writer, 24 /* DotDotDotToken */);
+                    }
+                    appendSymbolNameOnly(bindingElement.symbol, writer);
+                }
             }
-        }
-        function bindAssignmentTargetFlow(node) {
-            if (isNarrowableReference(node)) {
-                currentFlow = createFlowAssignment(currentFlow, node);
+            function buildDisplayForTypeParametersAndDelimiters(typeParameters, writer, enclosingDeclaration, flags, symbolStack) {
+                if (typeParameters && typeParameters.length) {
+                    writePunctuation(writer, 27 /* LessThanToken */);
+                    buildDisplayForCommaSeparatedList(typeParameters, writer, function (p) { return buildTypeParameterDisplay(p, writer, enclosingDeclaration, flags, symbolStack); });
+                    writePunctuation(writer, 29 /* GreaterThanToken */);
+                }
             }
-            else if (node.kind === 170 /* ArrayLiteralExpression */) {
-                for (var _i = 0, _a = node.elements; _i < _a.length; _i++) {
-                    var e = _a[_i];
-                    if (e.kind === 191 /* SpreadElementExpression */) {
-                        bindAssignmentTargetFlow(e.expression);
-                    }
-                    else {
-                        bindDestructuringTargetFlow(e);
+            function buildDisplayForCommaSeparatedList(list, writer, action) {
+                for (var i = 0; i < list.length; i++) {
+                    if (i > 0) {
+                        writePunctuation(writer, 26 /* CommaToken */);
+                        writeSpace(writer);
                     }
+                    action(list[i]);
                 }
             }
-            else if (node.kind === 171 /* ObjectLiteralExpression */) {
-                for (var _b = 0, _c = node.properties; _b < _c.length; _b++) {
-                    var p = _c[_b];
-                    if (p.kind === 253 /* PropertyAssignment */) {
-                        bindDestructuringTargetFlow(p.initializer);
-                    }
-                    else if (p.kind === 254 /* ShorthandPropertyAssignment */) {
-                        bindAssignmentTargetFlow(p.name);
+            function buildDisplayForTypeArgumentsAndDelimiters(typeParameters, mapper, writer, enclosingDeclaration) {
+                if (typeParameters && typeParameters.length) {
+                    writePunctuation(writer, 27 /* LessThanToken */);
+                    var flags = 512 /* InFirstTypeArgument */;
+                    for (var i = 0; i < typeParameters.length; i++) {
+                        if (i > 0) {
+                            writePunctuation(writer, 26 /* CommaToken */);
+                            writeSpace(writer);
+                            flags = 0 /* None */;
+                        }
+                        buildTypeDisplay(mapper(typeParameters[i]), writer, enclosingDeclaration, flags);
                     }
+                    writePunctuation(writer, 29 /* GreaterThanToken */);
                 }
             }
-        }
-        function bindLogicalExpression(node, trueTarget, falseTarget) {
-            var preRightLabel = createBranchLabel();
-            if (node.operatorToken.kind === 51 /* AmpersandAmpersandToken */) {
-                bindCondition(node.left, preRightLabel, falseTarget);
-            }
-            else {
-                bindCondition(node.left, trueTarget, preRightLabel);
-            }
-            currentFlow = finishFlowLabel(preRightLabel);
-            bind(node.operatorToken);
-            bindCondition(node.right, trueTarget, falseTarget);
-        }
-        function bindPrefixUnaryExpressionFlow(node) {
-            if (node.operator === 49 /* ExclamationToken */) {
-                var saveTrueTarget = currentTrueTarget;
-                currentTrueTarget = currentFalseTarget;
-                currentFalseTarget = saveTrueTarget;
-                ts.forEachChild(node, bind);
-                currentFalseTarget = currentTrueTarget;
-                currentTrueTarget = saveTrueTarget;
+            function buildDisplayForParametersAndDelimiters(thisParameter, parameters, writer, enclosingDeclaration, flags, symbolStack) {
+                writePunctuation(writer, 19 /* OpenParenToken */);
+                if (thisParameter) {
+                    buildParameterDisplay(thisParameter, writer, enclosingDeclaration, flags, symbolStack);
+                }
+                for (var i = 0; i < parameters.length; i++) {
+                    if (i > 0 || thisParameter) {
+                        writePunctuation(writer, 26 /* CommaToken */);
+                        writeSpace(writer);
+                    }
+                    buildParameterDisplay(parameters[i], writer, enclosingDeclaration, flags, symbolStack);
+                }
+                writePunctuation(writer, 20 /* CloseParenToken */);
             }
-            else {
-                ts.forEachChild(node, bind);
-                if (node.operator === 57 /* PlusEqualsToken */ || node.operator === 42 /* MinusMinusToken */) {
-                    bindAssignmentTargetFlow(node.operand);
+            function buildTypePredicateDisplay(predicate, writer, enclosingDeclaration, flags, symbolStack) {
+                if (ts.isIdentifierTypePredicate(predicate)) {
+                    writer.writeParameter(predicate.parameterName);
+                }
+                else {
+                    writeKeyword(writer, 99 /* ThisKeyword */);
                 }
+                writeSpace(writer);
+                writeKeyword(writer, 126 /* IsKeyword */);
+                writeSpace(writer);
+                buildTypeDisplay(predicate.type, writer, enclosingDeclaration, flags, symbolStack);
             }
-        }
-        function bindPostfixUnaryExpressionFlow(node) {
-            ts.forEachChild(node, bind);
-            if (node.operator === 41 /* PlusPlusToken */ || node.operator === 42 /* MinusMinusToken */) {
-                bindAssignmentTargetFlow(node.operand);
+            function buildReturnTypeDisplay(signature, writer, enclosingDeclaration, flags, symbolStack) {
+                var returnType = getReturnTypeOfSignature(signature);
+                if (flags & 4096 /* SuppressAnyReturnType */ && isTypeAny(returnType)) {
+                    return;
+                }
+                if (flags & 16 /* WriteArrowStyleSignature */) {
+                    writeSpace(writer);
+                    writePunctuation(writer, 36 /* EqualsGreaterThanToken */);
+                }
+                else {
+                    writePunctuation(writer, 56 /* ColonToken */);
+                }
+                writeSpace(writer);
+                if (signature.typePredicate) {
+                    buildTypePredicateDisplay(signature.typePredicate, writer, enclosingDeclaration, flags, symbolStack);
+                }
+                else {
+                    buildTypeDisplay(returnType, writer, enclosingDeclaration, flags, symbolStack);
+                }
             }
-        }
-        function bindBinaryExpressionFlow(node) {
-            var operator = node.operatorToken.kind;
-            if (operator === 51 /* AmpersandAmpersandToken */ || operator === 52 /* BarBarToken */) {
-                if (isTopLevelLogicalExpression(node)) {
-                    var postExpressionLabel = createBranchLabel();
-                    bindLogicalExpression(node, postExpressionLabel, postExpressionLabel);
-                    currentFlow = finishFlowLabel(postExpressionLabel);
+            function buildSignatureDisplay(signature, writer, enclosingDeclaration, flags, kind, symbolStack) {
+                if (kind === 1 /* Construct */) {
+                    writeKeyword(writer, 94 /* NewKeyword */);
+                    writeSpace(writer);
+                }
+                if (signature.target && (flags & 64 /* WriteTypeArgumentsOfSignature */)) {
+                    // Instantiated signature, write type arguments instead
+                    // This is achieved by passing in the mapper separately
+                    buildDisplayForTypeArgumentsAndDelimiters(signature.target.typeParameters, signature.mapper, writer, enclosingDeclaration);
                 }
                 else {
-                    bindLogicalExpression(node, currentTrueTarget, currentFalseTarget);
+                    buildDisplayForTypeParametersAndDelimiters(signature.typeParameters, writer, enclosingDeclaration, flags, symbolStack);
                 }
+                buildDisplayForParametersAndDelimiters(signature.thisParameter, signature.parameters, writer, enclosingDeclaration, flags, symbolStack);
+                buildReturnTypeDisplay(signature, writer, enclosingDeclaration, flags, symbolStack);
             }
-            else {
-                ts.forEachChild(node, bind);
-                if (operator === 56 /* EqualsToken */ && !ts.isAssignmentTarget(node)) {
-                    bindAssignmentTargetFlow(node.left);
+            function buildIndexSignatureDisplay(info, writer, kind, enclosingDeclaration, globalFlags, symbolStack) {
+                if (info) {
+                    if (info.isReadonly) {
+                        writeKeyword(writer, 131 /* ReadonlyKeyword */);
+                        writeSpace(writer);
+                    }
+                    writePunctuation(writer, 21 /* OpenBracketToken */);
+                    writer.writeParameter(info.declaration ? ts.declarationNameToString(info.declaration.parameters[0].name) : "x");
+                    writePunctuation(writer, 56 /* ColonToken */);
+                    writeSpace(writer);
+                    switch (kind) {
+                        case 1 /* Number */:
+                            writeKeyword(writer, 133 /* NumberKeyword */);
+                            break;
+                        case 0 /* String */:
+                            writeKeyword(writer, 136 /* StringKeyword */);
+                            break;
+                    }
+                    writePunctuation(writer, 22 /* CloseBracketToken */);
+                    writePunctuation(writer, 56 /* ColonToken */);
+                    writeSpace(writer);
+                    buildTypeDisplay(info.type, writer, enclosingDeclaration, globalFlags, symbolStack);
+                    writePunctuation(writer, 25 /* SemicolonToken */);
+                    writer.writeLine();
                 }
             }
+            return _displayBuilder || (_displayBuilder = {
+                buildSymbolDisplay: buildSymbolDisplay,
+                buildTypeDisplay: buildTypeDisplay,
+                buildTypeParameterDisplay: buildTypeParameterDisplay,
+                buildTypePredicateDisplay: buildTypePredicateDisplay,
+                buildParameterDisplay: buildParameterDisplay,
+                buildDisplayForParametersAndDelimiters: buildDisplayForParametersAndDelimiters,
+                buildDisplayForTypeParametersAndDelimiters: buildDisplayForTypeParametersAndDelimiters,
+                buildTypeParameterDisplayFromSymbol: buildTypeParameterDisplayFromSymbol,
+                buildSignatureDisplay: buildSignatureDisplay,
+                buildIndexSignatureDisplay: buildIndexSignatureDisplay,
+                buildReturnTypeDisplay: buildReturnTypeDisplay
+            });
         }
-        function bindDeleteExpressionFlow(node) {
-            ts.forEachChild(node, bind);
-            if (node.expression.kind === 172 /* PropertyAccessExpression */) {
-                bindAssignmentTargetFlow(node.expression);
+        function isDeclarationVisible(node) {
+            if (node) {
+                var links = getNodeLinks(node);
+                if (links.isVisible === undefined) {
+                    links.isVisible = !!determineIfDeclarationIsVisible();
+                }
+                return links.isVisible;
+            }
+            return false;
+            function determineIfDeclarationIsVisible() {
+                switch (node.kind) {
+                    case 176 /* BindingElement */:
+                        return isDeclarationVisible(node.parent.parent);
+                    case 226 /* VariableDeclaration */:
+                        if (ts.isBindingPattern(node.name) &&
+                            !node.name.elements.length) {
+                            // If the binding pattern is empty, this variable declaration is not visible
+                            return false;
+                        }
+                    // falls through
+                    case 233 /* ModuleDeclaration */:
+                    case 229 /* ClassDeclaration */:
+                    case 230 /* InterfaceDeclaration */:
+                    case 231 /* TypeAliasDeclaration */:
+                    case 228 /* FunctionDeclaration */:
+                    case 232 /* EnumDeclaration */:
+                    case 237 /* ImportEqualsDeclaration */:
+                        // external module augmentation is always visible
+                        if (ts.isExternalModuleAugmentation(node)) {
+                            return true;
+                        }
+                        var parent_11 = getDeclarationContainer(node);
+                        // If the node is not exported or it is not ambient module element (except import declaration)
+                        if (!(ts.getCombinedModifierFlags(node) & 1 /* Export */) &&
+                            !(node.kind !== 237 /* ImportEqualsDeclaration */ && parent_11.kind !== 265 /* SourceFile */ && ts.isInAmbientContext(parent_11))) {
+                            return isGlobalSourceFile(parent_11);
+                        }
+                        // Exported members/ambient module elements (exception import declaration) are visible if parent is visible
+                        return isDeclarationVisible(parent_11);
+                    case 149 /* PropertyDeclaration */:
+                    case 148 /* PropertySignature */:
+                    case 153 /* GetAccessor */:
+                    case 154 /* SetAccessor */:
+                    case 151 /* MethodDeclaration */:
+                    case 150 /* MethodSignature */:
+                        if (ts.getModifierFlags(node) & (8 /* Private */ | 16 /* Protected */)) {
+                            // Private/protected properties/methods are not visible
+                            return false;
+                        }
+                    // Public properties/methods are visible if its parents are visible, so:
+                    // falls through
+                    case 152 /* Constructor */:
+                    case 156 /* ConstructSignature */:
+                    case 155 /* CallSignature */:
+                    case 157 /* IndexSignature */:
+                    case 146 /* Parameter */:
+                    case 234 /* ModuleBlock */:
+                    case 160 /* FunctionType */:
+                    case 161 /* ConstructorType */:
+                    case 163 /* TypeLiteral */:
+                    case 159 /* TypeReference */:
+                    case 164 /* ArrayType */:
+                    case 165 /* TupleType */:
+                    case 166 /* UnionType */:
+                    case 167 /* IntersectionType */:
+                    case 168 /* ParenthesizedType */:
+                        return isDeclarationVisible(node.parent);
+                    // Default binding, import specifier and namespace import is visible
+                    // only on demand so by default it is not visible
+                    case 239 /* ImportClause */:
+                    case 240 /* NamespaceImport */:
+                    case 242 /* ImportSpecifier */:
+                        return false;
+                    // Type parameters are always visible
+                    case 145 /* TypeParameter */:
+                    // Source file and namespace export are always visible
+                    case 265 /* SourceFile */:
+                    case 236 /* NamespaceExportDeclaration */:
+                        return true;
+                    // Export assignments do not create name bindings outside the module
+                    case 243 /* ExportAssignment */:
+                        return false;
+                    default:
+                        return false;
+                }
             }
         }
-        function bindConditionalExpressionFlow(node) {
-            var trueLabel = createBranchLabel();
-            var falseLabel = createBranchLabel();
-            var postExpressionLabel = createBranchLabel();
-            bindCondition(node.condition, trueLabel, falseLabel);
-            currentFlow = finishFlowLabel(trueLabel);
-            bind(node.whenTrue);
-            addAntecedent(postExpressionLabel, currentFlow);
-            currentFlow = finishFlowLabel(falseLabel);
-            bind(node.whenFalse);
-            addAntecedent(postExpressionLabel, currentFlow);
-            currentFlow = finishFlowLabel(postExpressionLabel);
+        function collectLinkedAliases(node) {
+            var exportSymbol;
+            if (node.parent && node.parent.kind === 243 /* ExportAssignment */) {
+                exportSymbol = resolveName(node.parent, node.text, 107455 /* Value */ | 793064 /* Type */ | 1920 /* Namespace */ | 8388608 /* Alias */, ts.Diagnostics.Cannot_find_name_0, node);
+            }
+            else if (node.parent.kind === 246 /* ExportSpecifier */) {
+                exportSymbol = getTargetOfExportSpecifier(node.parent, 107455 /* Value */ | 793064 /* Type */ | 1920 /* Namespace */ | 8388608 /* Alias */);
+            }
+            var result = [];
+            if (exportSymbol) {
+                buildVisibleNodeList(exportSymbol.declarations);
+            }
+            return result;
+            function buildVisibleNodeList(declarations) {
+                ts.forEach(declarations, function (declaration) {
+                    getNodeLinks(declaration).isVisible = true;
+                    var resultNode = getAnyImportSyntax(declaration) || declaration;
+                    if (!ts.contains(result, resultNode)) {
+                        result.push(resultNode);
+                    }
+                    if (ts.isInternalModuleImportEqualsDeclaration(declaration)) {
+                        // Add the referenced top container visible
+                        var internalModuleReference = declaration.moduleReference;
+                        var firstIdentifier = getFirstIdentifier(internalModuleReference);
+                        var importSymbol = resolveName(declaration, firstIdentifier.text, 107455 /* Value */ | 793064 /* Type */ | 1920 /* Namespace */, undefined, undefined);
+                        if (importSymbol) {
+                            buildVisibleNodeList(importSymbol.declarations);
+                        }
+                    }
+                });
+            }
         }
-        function bindInitializedVariableFlow(node) {
-            var name = !ts.isOmittedExpression(node) ? node.name : undefined;
-            if (ts.isBindingPattern(name)) {
-                for (var _i = 0, _a = name.elements; _i < _a.length; _i++) {
-                    var child = _a[_i];
-                    bindInitializedVariableFlow(child);
+        /**
+         * Push an entry on the type resolution stack. If an entry with the given target and the given property name
+         * is already on the stack, and no entries in between already have a type, then a circularity has occurred.
+         * In this case, the result values of the existing entry and all entries pushed after it are changed to false,
+         * and the value false is returned. Otherwise, the new entry is just pushed onto the stack, and true is returned.
+         * In order to see if the same query has already been done before, the target object and the propertyName both
+         * must match the one passed in.
+         *
+         * @param target The symbol, type, or signature whose type is being queried
+         * @param propertyName The property name that should be used to query the target for its type
+         */
+        function pushTypeResolution(target, propertyName) {
+            var resolutionCycleStartIndex = findResolutionCycleStartIndex(target, propertyName);
+            if (resolutionCycleStartIndex >= 0) {
+                // A cycle was found
+                var length_3 = resolutionTargets.length;
+                for (var i = resolutionCycleStartIndex; i < length_3; i++) {
+                    resolutionResults[i] = false;
                 }
+                return false;
             }
-            else {
-                currentFlow = createFlowAssignment(currentFlow, node);
-            }
+            resolutionTargets.push(target);
+            resolutionResults.push(/*items*/ true);
+            resolutionPropertyNames.push(propertyName);
+            return true;
         }
-        function bindVariableDeclarationFlow(node) {
-            ts.forEachChild(node, bind);
-            if (node.initializer || node.parent.parent.kind === 207 /* ForInStatement */ || node.parent.parent.kind === 208 /* ForOfStatement */) {
-                bindInitializedVariableFlow(node);
+        function findResolutionCycleStartIndex(target, propertyName) {
+            for (var i = resolutionTargets.length - 1; i >= 0; i--) {
+                if (hasType(resolutionTargets[i], resolutionPropertyNames[i])) {
+                    return -1;
+                }
+                if (resolutionTargets[i] === target && resolutionPropertyNames[i] === propertyName) {
+                    return i;
+                }
             }
+            return -1;
         }
-        function bindCallExpressionFlow(node) {
-            // If the target of the call expression is a function expression or arrow function we have
-            // an immediately invoked function expression (IIFE). Initialize the flowNode property to
-            // the current control flow (which includes evaluation of the IIFE arguments).
-            var expr = node.expression;
-            while (expr.kind === 178 /* ParenthesizedExpression */) {
-                expr = expr.expression;
+        function hasType(target, propertyName) {
+            if (propertyName === 0 /* Type */) {
+                return getSymbolLinks(target).type;
             }
-            if (expr.kind === 179 /* FunctionExpression */ || expr.kind === 180 /* ArrowFunction */) {
-                ts.forEach(node.typeArguments, bind);
-                ts.forEach(node.arguments, bind);
-                bind(node.expression);
+            if (propertyName === 2 /* DeclaredType */) {
+                return getSymbolLinks(target).declaredType;
             }
-            else {
-                ts.forEachChild(node, bind);
+            if (propertyName === 1 /* ResolvedBaseConstructorType */) {
+                return target.resolvedBaseConstructorType;
             }
-        }
-        function getContainerFlags(node) {
-            switch (node.kind) {
-                case 192 /* ClassExpression */:
-                case 221 /* ClassDeclaration */:
-                case 224 /* EnumDeclaration */:
-                case 171 /* ObjectLiteralExpression */:
-                case 159 /* TypeLiteral */:
-                case 281 /* JSDocTypeLiteral */:
-                case 265 /* JSDocRecordType */:
-                    return 1 /* IsContainer */;
-                case 222 /* InterfaceDeclaration */:
-                    return 1 /* IsContainer */ | 64 /* IsInterface */;
-                case 269 /* JSDocFunctionType */:
-                case 225 /* ModuleDeclaration */:
-                case 223 /* TypeAliasDeclaration */:
-                    return 1 /* IsContainer */ | 32 /* HasLocals */;
-                case 256 /* SourceFile */:
-                    return 1 /* IsContainer */ | 4 /* IsControlFlowContainer */ | 32 /* HasLocals */;
-                case 148 /* Constructor */:
-                case 220 /* FunctionDeclaration */:
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                case 151 /* CallSignature */:
-                case 152 /* ConstructSignature */:
-                case 153 /* IndexSignature */:
-                case 156 /* FunctionType */:
-                case 157 /* ConstructorType */:
-                    return 1 /* IsContainer */ | 4 /* IsControlFlowContainer */ | 32 /* HasLocals */ | 8 /* IsFunctionLike */;
-                case 179 /* FunctionExpression */:
-                case 180 /* ArrowFunction */:
-                    return 1 /* IsContainer */ | 4 /* IsControlFlowContainer */ | 32 /* HasLocals */ | 8 /* IsFunctionLike */ | 16 /* IsFunctionExpression */;
-                case 226 /* ModuleBlock */:
-                    return 4 /* IsControlFlowContainer */;
-                case 145 /* PropertyDeclaration */:
-                    return node.initializer ? 4 /* IsControlFlowContainer */ : 0;
-                case 252 /* CatchClause */:
-                case 206 /* ForStatement */:
-                case 207 /* ForInStatement */:
-                case 208 /* ForOfStatement */:
-                case 227 /* CaseBlock */:
-                    return 2 /* IsBlockScopedContainer */;
-                case 199 /* Block */:
-                    // do not treat blocks directly inside a function as a block-scoped-container.
-                    // Locals that reside in this block should go to the function locals. Otherwise 'x'
-                    // would not appear to be a redeclaration of a block scoped local in the following
-                    // example:
-                    //
-                    //      function foo() {
-                    //          var x;
-                    //          let x;
-                    //      }
-                    //
-                    // If we placed 'var x' into the function locals and 'let x' into the locals of
-                    // the block, then there would be no collision.
-                    //
-                    // By not creating a new block-scoped-container here, we ensure that both 'var x'
-                    // and 'let x' go into the Function-container's locals, and we do get a collision
-                    // conflict.
-                    return ts.isFunctionLike(node.parent) ? 0 /* None */ : 2 /* IsBlockScopedContainer */;
+            if (propertyName === 3 /* ResolvedReturnType */) {
+                return target.resolvedReturnType;
             }
-            return 0 /* None */;
+            ts.Debug.fail("Unhandled TypeSystemPropertyName " + propertyName);
         }
-        function addToContainerChain(next) {
-            if (lastContainer) {
-                lastContainer.nextContainer = next;
-            }
-            lastContainer = next;
+        // Pop an entry from the type resolution stack and return its associated result value. The result value will
+        // be true if no circularities were detected, or false if a circularity was found.
+        function popTypeResolution() {
+            resolutionTargets.pop();
+            resolutionPropertyNames.pop();
+            return resolutionResults.pop();
         }
-        function declareSymbolAndAddToSymbolTable(node, symbolFlags, symbolExcludes) {
-            // Just call this directly so that the return type of this function stays "void".
-            return declareSymbolAndAddToSymbolTableWorker(node, symbolFlags, symbolExcludes);
+        function getDeclarationContainer(node) {
+            node = ts.findAncestor(ts.getRootDeclaration(node), function (node) {
+                switch (node.kind) {
+                    case 226 /* VariableDeclaration */:
+                    case 227 /* VariableDeclarationList */:
+                    case 242 /* ImportSpecifier */:
+                    case 241 /* NamedImports */:
+                    case 240 /* NamespaceImport */:
+                    case 239 /* ImportClause */:
+                        return false;
+                    default:
+                        return true;
+                }
+            });
+            return node && node.parent;
         }
-        function declareSymbolAndAddToSymbolTableWorker(node, symbolFlags, symbolExcludes) {
-            switch (container.kind) {
-                // Modules, source files, and classes need specialized handling for how their
-                // members are declared (for example, a member of a class will go into a specific
-                // symbol table depending on if it is static or not). We defer to specialized
-                // handlers to take care of declaring these child members.
-                case 225 /* ModuleDeclaration */:
-                    return declareModuleMember(node, symbolFlags, symbolExcludes);
-                case 256 /* SourceFile */:
-                    return declareSourceFileMember(node, symbolFlags, symbolExcludes);
-                case 192 /* ClassExpression */:
-                case 221 /* ClassDeclaration */:
-                    return declareClassMember(node, symbolFlags, symbolExcludes);
-                case 224 /* EnumDeclaration */:
-                    return declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
-                case 159 /* TypeLiteral */:
-                case 171 /* ObjectLiteralExpression */:
-                case 222 /* InterfaceDeclaration */:
-                case 265 /* JSDocRecordType */:
-                case 281 /* JSDocTypeLiteral */:
-                    // Interface/Object-types always have their children added to the 'members' of
-                    // their container. They are only accessible through an instance of their
-                    // container, and are never in scope otherwise (even inside the body of the
-                    // object / type / interface declaring them). An exception is type parameters,
-                    // which are in scope without qualification (similar to 'locals').
-                    return declareSymbol(container.symbol.members, container.symbol, node, symbolFlags, symbolExcludes);
-                case 156 /* FunctionType */:
-                case 157 /* ConstructorType */:
-                case 151 /* CallSignature */:
-                case 152 /* ConstructSignature */:
-                case 153 /* IndexSignature */:
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                case 148 /* Constructor */:
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                case 220 /* FunctionDeclaration */:
-                case 179 /* FunctionExpression */:
-                case 180 /* ArrowFunction */:
-                case 269 /* JSDocFunctionType */:
-                case 223 /* TypeAliasDeclaration */:
-                    // All the children of these container types are never visible through another
-                    // symbol (i.e. through another symbol's 'exports' or 'members').  Instead,
-                    // they're only accessed 'lexically' (i.e. from code that exists underneath
-                    // their container in the tree.  To accomplish this, we simply add their declared
-                    // symbol to the 'locals' of the container.  These symbols can then be found as
-                    // the type checker walks up the containers, checking them for matching names.
-                    return declareSymbol(container.locals, /*parent*/ undefined, node, symbolFlags, symbolExcludes);
-            }
+        function getTypeOfPrototypeProperty(prototype) {
+            // TypeScript 1.0 spec (April 2014): 8.4
+            // Every class automatically contains a static property member named 'prototype',
+            // the type of which is an instantiation of the class type with type Any supplied as a type argument for each type parameter.
+            // It is an error to explicitly declare a static property member with the name 'prototype'.
+            var classType = getDeclaredTypeOfSymbol(getParentOfSymbol(prototype));
+            return classType.typeParameters ? createTypeReference(classType, ts.map(classType.typeParameters, function (_) { return anyType; })) : classType;
+        }
+        // Return the type of the given property in the given type, or undefined if no such property exists
+        function getTypeOfPropertyOfType(type, name) {
+            var prop = getPropertyOfType(type, name);
+            return prop ? getTypeOfSymbol(prop) : undefined;
         }
-        function declareClassMember(node, symbolFlags, symbolExcludes) {
-            return ts.hasModifier(node, 32 /* Static */)
-                ? declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes)
-                : declareSymbol(container.symbol.members, container.symbol, node, symbolFlags, symbolExcludes);
+        function isTypeAny(type) {
+            return type && (type.flags & 1 /* Any */) !== 0;
         }
-        function declareSourceFileMember(node, symbolFlags, symbolExcludes) {
-            return ts.isExternalModule(file)
-                ? declareModuleMember(node, symbolFlags, symbolExcludes)
-                : declareSymbol(file.locals, undefined, node, symbolFlags, symbolExcludes);
+        // Return the type of a binding element parent. We check SymbolLinks first to see if a type has been
+        // assigned by contextual typing.
+        function getTypeForBindingElementParent(node) {
+            var symbol = getSymbolOfNode(node);
+            return symbol && getSymbolLinks(symbol).type || getTypeForVariableLikeDeclaration(node, /*includeOptionality*/ false);
         }
-        function hasExportDeclarations(node) {
-            var body = node.kind === 256 /* SourceFile */ ? node : node.body;
-            if (body && (body.kind === 256 /* SourceFile */ || body.kind === 226 /* ModuleBlock */)) {
-                for (var _i = 0, _a = body.statements; _i < _a.length; _i++) {
-                    var stat = _a[_i];
-                    if (stat.kind === 236 /* ExportDeclaration */ || stat.kind === 235 /* ExportAssignment */) {
-                        return true;
-                    }
-                }
-            }
-            return false;
+        function isComputedNonLiteralName(name) {
+            return name.kind === 144 /* ComputedPropertyName */ && !ts.isStringOrNumericLiteral(name.expression);
         }
-        function setExportContextFlag(node) {
-            // A declaration source file or ambient module declaration that contains no export declarations (but possibly regular
-            // declarations with export modifiers) is an export context in which declarations are implicitly exported.
-            if (ts.isInAmbientContext(node) && !hasExportDeclarations(node)) {
-                node.flags |= 32 /* ExportContext */;
+        function getRestType(source, properties, symbol) {
+            source = filterType(source, function (t) { return !(t.flags & 6144 /* Nullable */); });
+            if (source.flags & 8192 /* Never */) {
+                return emptyObjectType;
             }
-            else {
-                node.flags &= ~32 /* ExportContext */;
+            if (source.flags & 65536 /* Union */) {
+                return mapType(source, function (t) { return getRestType(t, properties, symbol); });
             }
+            var members = ts.createMap();
+            var names = ts.createMap();
+            for (var _i = 0, properties_2 = properties; _i < properties_2.length; _i++) {
+                var name_16 = properties_2[_i];
+                names.set(ts.getTextOfPropertyName(name_16), true);
+            }
+            for (var _a = 0, _b = getPropertiesOfType(source); _a < _b.length; _a++) {
+                var prop = _b[_a];
+                var inNamesToRemove = names.has(prop.name);
+                var isPrivate = ts.getDeclarationModifierFlagsFromSymbol(prop) & (8 /* Private */ | 16 /* Protected */);
+                var isSetOnlyAccessor = prop.flags & 65536 /* SetAccessor */ && !(prop.flags & 32768 /* GetAccessor */);
+                if (!inNamesToRemove && !isPrivate && !isClassMethod(prop) && !isSetOnlyAccessor) {
+                    members.set(prop.name, prop);
+                }
+            }
+            var stringIndexInfo = getIndexInfoOfType(source, 0 /* String */);
+            var numberIndexInfo = getIndexInfoOfType(source, 1 /* Number */);
+            return createAnonymousType(symbol, members, emptyArray, emptyArray, stringIndexInfo, numberIndexInfo);
         }
-        function bindModuleDeclaration(node) {
-            setExportContextFlag(node);
-            if (ts.isAmbientModule(node)) {
-                if (ts.hasModifier(node, 1 /* Export */)) {
-                    errorOnFirstToken(node, ts.Diagnostics.export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always_visible);
+        /** Return the inferred type for a binding element */
+        function getTypeForBindingElement(declaration) {
+            var pattern = declaration.parent;
+            var parentType = getTypeForBindingElementParent(pattern.parent);
+            // If parent has the unknown (error) type, then so does this binding element
+            if (parentType === unknownType) {
+                return unknownType;
+            }
+            // If no type was specified or inferred for parent, or if the specified or inferred type is any,
+            // infer from the initializer of the binding element if one is present. Otherwise, go with the
+            // undefined or any type of the parent.
+            if (!parentType || isTypeAny(parentType)) {
+                if (declaration.initializer) {
+                    return checkDeclarationInitializer(declaration);
                 }
-                if (ts.isExternalModuleAugmentation(node)) {
-                    declareSymbolAndAddToSymbolTable(node, 1024 /* NamespaceModule */, 0 /* NamespaceModuleExcludes */);
+                return parentType;
+            }
+            var type;
+            if (pattern.kind === 174 /* ObjectBindingPattern */) {
+                if (declaration.dotDotDotToken) {
+                    if (!isValidSpreadType(parentType)) {
+                        error(declaration, ts.Diagnostics.Rest_types_may_only_be_created_from_object_types);
+                        return unknownType;
+                    }
+                    var literalMembers = [];
+                    for (var _i = 0, _a = pattern.elements; _i < _a.length; _i++) {
+                        var element = _a[_i];
+                        if (!element.dotDotDotToken) {
+                            literalMembers.push(element.propertyName || element.name);
+                        }
+                    }
+                    type = getRestType(parentType, literalMembers, declaration.symbol);
                 }
                 else {
-                    var pattern = void 0;
-                    if (node.name.kind === 9 /* StringLiteral */) {
-                        var text = node.name.text;
-                        if (ts.hasZeroOrOneAsteriskCharacter(text)) {
-                            pattern = ts.tryParsePattern(text);
-                        }
-                        else {
-                            errorOnFirstToken(node.name, ts.Diagnostics.Pattern_0_can_have_at_most_one_Asterisk_character, text);
-                        }
+                    // Use explicitly specified property name ({ p: xxx } form), or otherwise the implied name ({ p } form)
+                    var name_17 = declaration.propertyName || declaration.name;
+                    if (isComputedNonLiteralName(name_17)) {
+                        // computed properties with non-literal names are treated as 'any'
+                        return anyType;
                     }
-                    var symbol = declareSymbolAndAddToSymbolTable(node, 512 /* ValueModule */, 106639 /* ValueModuleExcludes */);
-                    if (pattern) {
-                        (file.patternAmbientModules || (file.patternAmbientModules = [])).push({ pattern: pattern, symbol: symbol });
+                    if (declaration.initializer) {
+                        getContextualType(declaration.initializer);
+                    }
+                    // Use type of the specified property, or otherwise, for a numeric name, the type of the numeric index signature,
+                    // or otherwise the type of the string index signature.
+                    var text = ts.getTextOfPropertyName(name_17);
+                    type = getTypeOfPropertyOfType(parentType, text) ||
+                        isNumericLiteralName(text) && getIndexTypeOfType(parentType, 1 /* Number */) ||
+                        getIndexTypeOfType(parentType, 0 /* String */);
+                    if (!type) {
+                        error(name_17, ts.Diagnostics.Type_0_has_no_property_1_and_no_string_index_signature, typeToString(parentType), ts.declarationNameToString(name_17));
+                        return unknownType;
                     }
                 }
             }
             else {
-                var state = getModuleInstanceState(node);
-                if (state === 0 /* NonInstantiated */) {
-                    declareSymbolAndAddToSymbolTable(node, 1024 /* NamespaceModule */, 0 /* NamespaceModuleExcludes */);
+                // This elementType will be used if the specific property corresponding to this index is not
+                // present (aka the tuple element property). This call also checks that the parentType is in
+                // fact an iterable or array (depending on target language).
+                var elementType = checkIteratedTypeOrElementType(parentType, pattern, /*allowStringInput*/ false, /*allowAsyncIterables*/ false);
+                if (declaration.dotDotDotToken) {
+                    // Rest element has an array type with the same element type as the parent type
+                    type = createArrayType(elementType);
                 }
                 else {
-                    declareSymbolAndAddToSymbolTable(node, 512 /* ValueModule */, 106639 /* ValueModuleExcludes */);
-                    if (node.symbol.flags & (16 /* Function */ | 32 /* Class */ | 256 /* RegularEnum */)) {
-                        // if module was already merged with some function, class or non-const enum
-                        // treat is a non-const-enum-only
-                        node.symbol.constEnumOnlyModule = false;
-                    }
-                    else {
-                        var currentModuleIsConstEnumOnly = state === 2 /* ConstEnumOnly */;
-                        if (node.symbol.constEnumOnlyModule === undefined) {
-                            // non-merged case - use the current state
-                            node.symbol.constEnumOnlyModule = currentModuleIsConstEnumOnly;
+                    // Use specific property type when parent is a tuple or numeric index type when parent is an array
+                    var propName = "" + ts.indexOf(pattern.elements, declaration);
+                    type = isTupleLikeType(parentType)
+                        ? getTypeOfPropertyOfType(parentType, propName)
+                        : elementType;
+                    if (!type) {
+                        if (isTupleType(parentType)) {
+                            error(declaration, ts.Diagnostics.Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2, typeToString(parentType), getTypeReferenceArity(parentType), pattern.elements.length);
                         }
                         else {
-                            // merged case: module is const enum only if all its pieces are non-instantiated or const enum
-                            node.symbol.constEnumOnlyModule = node.symbol.constEnumOnlyModule && currentModuleIsConstEnumOnly;
+                            error(declaration, ts.Diagnostics.Type_0_has_no_property_1, typeToString(parentType), propName);
                         }
+                        return unknownType;
                     }
                 }
             }
+            // In strict null checking mode, if a default value of a non-undefined type is specified, remove
+            // undefined from the final type.
+            if (strictNullChecks && declaration.initializer && !(getFalsyFlags(checkExpressionCached(declaration.initializer)) & 2048 /* Undefined */)) {
+                type = getTypeWithFacts(type, 131072 /* NEUndefined */);
+            }
+            return declaration.initializer ?
+                getUnionType([type, checkExpressionCached(declaration.initializer)], /*subtypeReduction*/ true) :
+                type;
         }
-        function bindFunctionOrConstructorType(node) {
-            // For a given function symbol "<...>(...) => T" we want to generate a symbol identical
-            // to the one we would get for: { <...>(...): T }
-            //
-            // We do that by making an anonymous type literal symbol, and then setting the function
-            // symbol as its sole member. To the rest of the system, this symbol will be  indistinguishable
-            // from an actual type literal symbol you would have gotten had you used the long form.
-            var symbol = createSymbol(131072 /* Signature */, getDeclarationName(node));
-            addDeclarationToSymbol(symbol, node, 131072 /* Signature */);
-            var typeLiteralSymbol = createSymbol(2048 /* TypeLiteral */, "__type");
-            addDeclarationToSymbol(typeLiteralSymbol, node, 2048 /* TypeLiteral */);
-            typeLiteralSymbol.members = ts.createMap();
-            typeLiteralSymbol.members[symbol.name] = symbol;
+        function getTypeForDeclarationFromJSDocComment(declaration) {
+            var jsdocType = ts.getJSDocType(declaration);
+            if (jsdocType) {
+                return getTypeFromTypeNode(jsdocType);
+            }
+            return undefined;
         }
-        function bindObjectLiteralExpression(node) {
-            var ElementKind;
-            (function (ElementKind) {
-                ElementKind[ElementKind["Property"] = 1] = "Property";
-                ElementKind[ElementKind["Accessor"] = 2] = "Accessor";
-            })(ElementKind || (ElementKind = {}));
-            if (inStrictMode) {
-                var seen = ts.createMap();
-                for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
-                    var prop = _a[_i];
-                    if (prop.name.kind !== 69 /* Identifier */) {
-                        continue;
-                    }
-                    var identifier = prop.name;
-                    // ECMA-262 11.1.5 Object Initializer
-                    // If previous is not undefined then throw a SyntaxError exception if any of the following conditions are true
-                    // a.This production is contained in strict code and IsDataDescriptor(previous) is true and
-                    // IsDataDescriptor(propId.descriptor) is true.
-                    //    b.IsDataDescriptor(previous) is true and IsAccessorDescriptor(propId.descriptor) is true.
-                    //    c.IsAccessorDescriptor(previous) is true and IsDataDescriptor(propId.descriptor) is true.
-                    //    d.IsAccessorDescriptor(previous) is true and IsAccessorDescriptor(propId.descriptor) is true
-                    // and either both previous and propId.descriptor have[[Get]] fields or both previous and propId.descriptor have[[Set]] fields
-                    var currentKind = prop.kind === 253 /* PropertyAssignment */ || prop.kind === 254 /* ShorthandPropertyAssignment */ || prop.kind === 147 /* MethodDeclaration */
-                        ? 1 /* Property */
-                        : 2 /* Accessor */;
-                    var existingKind = seen[identifier.text];
-                    if (!existingKind) {
-                        seen[identifier.text] = currentKind;
-                        continue;
-                    }
-                    if (currentKind === 1 /* Property */ && existingKind === 1 /* Property */) {
-                        var span_1 = ts.getErrorSpanForNode(file, identifier);
-                        file.bindDiagnostics.push(ts.createFileDiagnostic(file, span_1.start, span_1.length, ts.Diagnostics.An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode));
+        function isNullOrUndefined(node) {
+            var expr = ts.skipParentheses(node);
+            return expr.kind === 95 /* NullKeyword */ || expr.kind === 71 /* Identifier */ && getResolvedSymbol(expr) === undefinedSymbol;
+        }
+        function isEmptyArrayLiteral(node) {
+            var expr = ts.skipParentheses(node);
+            return expr.kind === 177 /* ArrayLiteralExpression */ && expr.elements.length === 0;
+        }
+        function addOptionality(type, optional) {
+            return strictNullChecks && optional ? getNullableType(type, 2048 /* Undefined */) : type;
+        }
+        // Return the inferred type for a variable, parameter, or property declaration
+        function getTypeForVariableLikeDeclaration(declaration, includeOptionality) {
+            // A variable declared in a for..in statement is of type string, or of type keyof T when the
+            // right hand expression is of a type parameter type.
+            if (declaration.parent.parent.kind === 215 /* ForInStatement */) {
+                var indexType = getIndexType(checkNonNullExpression(declaration.parent.parent.expression));
+                return indexType.flags & (16384 /* TypeParameter */ | 262144 /* Index */) ? indexType : stringType;
+            }
+            if (declaration.parent.parent.kind === 216 /* ForOfStatement */) {
+                // checkRightHandSideOfForOf will return undefined if the for-of expression type was
+                // missing properties/signatures required to get its iteratedType (like
+                // [Symbol.iterator] or next). This may be because we accessed properties from anyType,
+                // or it may have led to an error inside getElementTypeOfIterable.
+                var forOfStatement = declaration.parent.parent;
+                return checkRightHandSideOfForOf(forOfStatement.expression, forOfStatement.awaitModifier) || anyType;
+            }
+            if (ts.isBindingPattern(declaration.parent)) {
+                return getTypeForBindingElement(declaration);
+            }
+            // Use type from type annotation if one is present
+            var typeNode = ts.getEffectiveTypeAnnotationNode(declaration);
+            if (typeNode) {
+                var declaredType = getTypeFromTypeNode(typeNode);
+                return addOptionality(declaredType, /*optional*/ declaration.questionToken && includeOptionality);
+            }
+            if ((noImplicitAny || declaration.flags & 65536 /* JavaScriptFile */) &&
+                declaration.kind === 226 /* VariableDeclaration */ && !ts.isBindingPattern(declaration.name) &&
+                !(ts.getCombinedModifierFlags(declaration) & 1 /* Export */) && !ts.isInAmbientContext(declaration)) {
+                // If --noImplicitAny is on or the declaration is in a Javascript file,
+                // use control flow tracked 'any' type for non-ambient, non-exported var or let variables with no
+                // initializer or a 'null' or 'undefined' initializer.
+                if (!(ts.getCombinedNodeFlags(declaration) & 2 /* Const */) && (!declaration.initializer || isNullOrUndefined(declaration.initializer))) {
+                    return autoType;
+                }
+                // Use control flow tracked 'any[]' type for non-ambient, non-exported variables with an empty array
+                // literal initializer.
+                if (declaration.initializer && isEmptyArrayLiteral(declaration.initializer)) {
+                    return autoArrayType;
+                }
+            }
+            if (declaration.kind === 146 /* Parameter */) {
+                var func = declaration.parent;
+                // For a parameter of a set accessor, use the type of the get accessor if one is present
+                if (func.kind === 154 /* SetAccessor */ && !ts.hasDynamicName(func)) {
+                    var getter = ts.getDeclarationOfKind(declaration.parent.symbol, 153 /* GetAccessor */);
+                    if (getter) {
+                        var getterSignature = getSignatureFromDeclaration(getter);
+                        var thisParameter = getAccessorThisParameter(func);
+                        if (thisParameter && declaration === thisParameter) {
+                            // Use the type from the *getter*
+                            ts.Debug.assert(!thisParameter.type);
+                            return getTypeOfSymbol(getterSignature.thisParameter);
+                        }
+                        return getReturnTypeOfSignature(getterSignature);
                     }
                 }
+                // Use contextual parameter type if one is available
+                var type = void 0;
+                if (declaration.symbol.name === "this") {
+                    type = getContextualThisParameterType(func);
+                }
+                else {
+                    type = getContextuallyTypedParameterType(declaration);
+                }
+                if (type) {
+                    return addOptionality(type, /*optional*/ declaration.questionToken && includeOptionality);
+                }
             }
-            return bindAnonymousDeclaration(node, 4096 /* ObjectLiteral */, "__object");
-        }
-        function bindAnonymousDeclaration(node, symbolFlags, name) {
-            var symbol = createSymbol(symbolFlags, name);
-            addDeclarationToSymbol(symbol, node, symbolFlags);
+            // Use the type of the initializer expression if one is present
+            if (declaration.initializer) {
+                var type = checkDeclarationInitializer(declaration);
+                return addOptionality(type, /*optional*/ declaration.questionToken && includeOptionality);
+            }
+            if (ts.isJsxAttribute(declaration)) {
+                // if JSX attribute doesn't have initializer, by default the attribute will have boolean value of true.
+                // I.e <Elem attr /> is sugar for <Elem attr={true} />
+                return trueType;
+            }
+            // If it is a short-hand property assignment, use the type of the identifier
+            if (declaration.kind === 262 /* ShorthandPropertyAssignment */) {
+                return checkIdentifier(declaration.name);
+            }
+            // If the declaration specifies a binding pattern, use the type implied by the binding pattern
+            if (ts.isBindingPattern(declaration.name)) {
+                return getTypeFromBindingPattern(declaration.name, /*includePatternInType*/ false, /*reportErrors*/ true);
+            }
+            // No type specified and nothing can be inferred
+            return undefined;
         }
-        function bindBlockScopedDeclaration(node, symbolFlags, symbolExcludes) {
-            switch (blockScopeContainer.kind) {
-                case 225 /* ModuleDeclaration */:
-                    declareModuleMember(node, symbolFlags, symbolExcludes);
-                    break;
-                case 256 /* SourceFile */:
-                    if (ts.isExternalModule(container)) {
-                        declareModuleMember(node, symbolFlags, symbolExcludes);
-                        break;
+        function getWidenedTypeFromJSSpecialPropertyDeclarations(symbol) {
+            var types = [];
+            var definedInConstructor = false;
+            var definedInMethod = false;
+            var jsDocType;
+            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                var declaration = _a[_i];
+                var expression = declaration.kind === 194 /* BinaryExpression */ ? declaration :
+                    declaration.kind === 179 /* PropertyAccessExpression */ ? ts.getAncestor(declaration, 194 /* BinaryExpression */) :
+                        undefined;
+                if (!expression) {
+                    return unknownType;
+                }
+                if (ts.isPropertyAccessExpression(expression.left) && expression.left.expression.kind === 99 /* ThisKeyword */) {
+                    if (ts.getThisContainer(expression, /*includeArrowFunctions*/ false).kind === 152 /* Constructor */) {
+                        definedInConstructor = true;
                     }
-                // fall through.
-                default:
-                    if (!blockScopeContainer.locals) {
-                        blockScopeContainer.locals = ts.createMap();
-                        addToContainerChain(blockScopeContainer);
+                    else {
+                        definedInMethod = true;
+                    }
+                }
+                // If there is a JSDoc type, use it
+                var type_1 = getTypeForDeclarationFromJSDocComment(expression.parent);
+                if (type_1) {
+                    var declarationType = getWidenedType(type_1);
+                    if (!jsDocType) {
+                        jsDocType = declarationType;
                     }
-                    declareSymbol(blockScopeContainer.locals, undefined, node, symbolFlags, symbolExcludes);
+                    else if (jsDocType !== unknownType && declarationType !== unknownType && !isTypeIdenticalTo(jsDocType, declarationType)) {
+                        var name_18 = ts.getNameOfDeclaration(declaration);
+                        error(name_18, ts.Diagnostics.Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_type_2, ts.declarationNameToString(name_18), typeToString(jsDocType), typeToString(declarationType));
+                    }
+                }
+                else if (!jsDocType) {
+                    // If we don't have an explicit JSDoc type, get the type from the expression.
+                    types.push(getWidenedLiteralType(checkExpressionCached(expression.right)));
+                }
             }
+            var type = jsDocType || getUnionType(types, /*subtypeReduction*/ true);
+            return getWidenedType(addOptionality(type, definedInMethod && !definedInConstructor));
         }
-        function bindBlockScopedVariableDeclaration(node) {
-            bindBlockScopedDeclaration(node, 2 /* BlockScopedVariable */, 107455 /* BlockScopedVariableExcludes */);
+        // Return the type implied by a binding pattern element. This is the type of the initializer of the element if
+        // one is present. Otherwise, if the element is itself a binding pattern, it is the type implied by the binding
+        // pattern. Otherwise, it is the type any.
+        function getTypeFromBindingElement(element, includePatternInType, reportErrors) {
+            if (element.initializer) {
+                return checkDeclarationInitializer(element);
+            }
+            if (ts.isBindingPattern(element.name)) {
+                return getTypeFromBindingPattern(element.name, includePatternInType, reportErrors);
+            }
+            if (reportErrors && noImplicitAny && !declarationBelongsToPrivateAmbientMember(element)) {
+                reportImplicitAnyError(element, anyType);
+            }
+            return anyType;
         }
-        // The binder visits every node in the syntax tree so it is a convenient place to perform a single localized
-        // check for reserved words used as identifiers in strict mode code.
-        function checkStrictModeIdentifier(node) {
-            if (inStrictMode &&
-                node.originalKeywordKind >= 106 /* FirstFutureReservedWord */ &&
-                node.originalKeywordKind <= 114 /* LastFutureReservedWord */ &&
-                !ts.isIdentifierName(node) &&
-                !ts.isInAmbientContext(node)) {
-                // Report error only if there are no parse errors in file
-                if (!file.parseDiagnostics.length) {
-                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node, getStrictModeIdentifierMessage(node), ts.declarationNameToString(node)));
+        // Return the type implied by an object binding pattern
+        function getTypeFromObjectBindingPattern(pattern, includePatternInType, reportErrors) {
+            var members = ts.createMap();
+            var stringIndexInfo;
+            var hasComputedProperties = false;
+            ts.forEach(pattern.elements, function (e) {
+                var name = e.propertyName || e.name;
+                if (isComputedNonLiteralName(name)) {
+                    // do not include computed properties in the implied type
+                    hasComputedProperties = true;
+                    return;
+                }
+                if (e.dotDotDotToken) {
+                    stringIndexInfo = createIndexInfo(anyType, /*isReadonly*/ false);
+                    return;
                 }
+                var text = ts.getTextOfPropertyName(name);
+                var flags = 4 /* Property */ | (e.initializer ? 67108864 /* Optional */ : 0);
+                var symbol = createSymbol(flags, text);
+                symbol.type = getTypeFromBindingElement(e, includePatternInType, reportErrors);
+                symbol.bindingElement = e;
+                members.set(symbol.name, symbol);
+            });
+            var result = createAnonymousType(undefined, members, emptyArray, emptyArray, stringIndexInfo, undefined);
+            if (includePatternInType) {
+                result.pattern = pattern;
+            }
+            if (hasComputedProperties) {
+                result.objectFlags |= 512 /* ObjectLiteralPatternWithComputedProperties */;
             }
+            return result;
         }
-        function getStrictModeIdentifierMessage(node) {
-            // Provide specialized messages to help the user understand why we think they're in
-            // strict mode.
-            if (ts.getContainingClass(node)) {
-                return ts.Diagnostics.Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_strict_mode;
+        // Return the type implied by an array binding pattern
+        function getTypeFromArrayBindingPattern(pattern, includePatternInType, reportErrors) {
+            var elements = pattern.elements;
+            var lastElement = ts.lastOrUndefined(elements);
+            if (elements.length === 0 || (!ts.isOmittedExpression(lastElement) && lastElement.dotDotDotToken)) {
+                return languageVersion >= 2 /* ES2015 */ ? createIterableType(anyType) : anyArrayType;
             }
-            if (file.externalModuleIndicator) {
-                return ts.Diagnostics.Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode;
+            // If the pattern has at least one element, and no rest element, then it should imply a tuple type.
+            var elementTypes = ts.map(elements, function (e) { return ts.isOmittedExpression(e) ? anyType : getTypeFromBindingElement(e, includePatternInType, reportErrors); });
+            var result = createTupleType(elementTypes);
+            if (includePatternInType) {
+                result = cloneTypeReference(result);
+                result.pattern = pattern;
             }
-            return ts.Diagnostics.Identifier_expected_0_is_a_reserved_word_in_strict_mode;
+            return result;
         }
-        function checkStrictModeBinaryExpression(node) {
-            if (inStrictMode && ts.isLeftHandSideExpression(node.left) && ts.isAssignmentOperator(node.operatorToken.kind)) {
-                // ECMA 262 (Annex C) The identifier eval or arguments may not appear as the LeftHandSideExpression of an
-                // Assignment operator(11.13) or of a PostfixExpression(11.3)
-                checkStrictModeEvalOrArguments(node, node.left);
-            }
+        // Return the type implied by a binding pattern. This is the type implied purely by the binding pattern itself
+        // and without regard to its context (i.e. without regard any type annotation or initializer associated with the
+        // declaration in which the binding pattern is contained). For example, the implied type of [x, y] is [any, any]
+        // and the implied type of { x, y: z = 1 } is { x: any; y: number; }. The type implied by a binding pattern is
+        // used as the contextual type of an initializer associated with the binding pattern. Also, for a destructuring
+        // parameter with no type annotation or initializer, the type implied by the binding pattern becomes the type of
+        // the parameter.
+        function getTypeFromBindingPattern(pattern, includePatternInType, reportErrors) {
+            return pattern.kind === 174 /* ObjectBindingPattern */
+                ? getTypeFromObjectBindingPattern(pattern, includePatternInType, reportErrors)
+                : getTypeFromArrayBindingPattern(pattern, includePatternInType, reportErrors);
         }
-        function checkStrictModeCatchClause(node) {
-            // It is a SyntaxError if a TryStatement with a Catch occurs within strict code and the Identifier of the
-            // Catch production is eval or arguments
-            if (inStrictMode && node.variableDeclaration) {
-                checkStrictModeEvalOrArguments(node, node.variableDeclaration.name);
+        // Return the type associated with a variable, parameter, or property declaration. In the simple case this is the type
+        // specified in a type annotation or inferred from an initializer. However, in the case of a destructuring declaration it
+        // is a bit more involved. For example:
+        //
+        //   var [x, s = ""] = [1, "one"];
+        //
+        // Here, the array literal [1, "one"] is contextually typed by the type [any, string], which is the implied type of the
+        // binding pattern [x, s = ""]. Because the contextual type is a tuple type, the resulting type of [1, "one"] is the
+        // tuple type [number, string]. Thus, the type inferred for 'x' is number and the type inferred for 's' is string.
+        function getWidenedTypeForVariableLikeDeclaration(declaration, reportErrors) {
+            var type = getTypeForVariableLikeDeclaration(declaration, /*includeOptionality*/ true);
+            if (type) {
+                if (reportErrors) {
+                    reportErrorsFromWidening(declaration, type);
+                }
+                // During a normal type check we'll never get to here with a property assignment (the check of the containing
+                // object literal uses a different path). We exclude widening only so that language services and type verification
+                // tools see the actual type.
+                if (declaration.kind === 261 /* PropertyAssignment */) {
+                    return type;
+                }
+                return getWidenedType(type);
             }
-        }
-        function checkStrictModeDeleteExpression(node) {
-            // Grammar checking
-            if (inStrictMode && node.expression.kind === 69 /* Identifier */) {
-                // When a delete operator occurs within strict mode code, a SyntaxError is thrown if its
-                // UnaryExpression is a direct reference to a variable, function argument, or function name
-                var span_2 = ts.getErrorSpanForNode(file, node.expression);
-                file.bindDiagnostics.push(ts.createFileDiagnostic(file, span_2.start, span_2.length, ts.Diagnostics.delete_cannot_be_called_on_an_identifier_in_strict_mode));
+            // Rest parameters default to type any[], other parameters default to type any
+            type = declaration.dotDotDotToken ? anyArrayType : anyType;
+            // Report implicit any errors unless this is a private property within an ambient declaration
+            if (reportErrors && noImplicitAny) {
+                if (!declarationBelongsToPrivateAmbientMember(declaration)) {
+                    reportImplicitAnyError(declaration, type);
+                }
             }
+            return type;
         }
-        function isEvalOrArgumentsIdentifier(node) {
-            return node.kind === 69 /* Identifier */ &&
-                (node.text === "eval" || node.text === "arguments");
+        function declarationBelongsToPrivateAmbientMember(declaration) {
+            var root = ts.getRootDeclaration(declaration);
+            var memberDeclaration = root.kind === 146 /* Parameter */ ? root.parent : root;
+            return isPrivateWithinAmbient(memberDeclaration);
         }
-        function checkStrictModeEvalOrArguments(contextNode, name) {
-            if (name && name.kind === 69 /* Identifier */) {
-                var identifier = name;
-                if (isEvalOrArgumentsIdentifier(identifier)) {
-                    // We check first if the name is inside class declaration or class expression; if so give explicit message
-                    // otherwise report generic error message.
-                    var span_3 = ts.getErrorSpanForNode(file, name);
-                    file.bindDiagnostics.push(ts.createFileDiagnostic(file, span_3.start, span_3.length, getStrictModeEvalOrArgumentsMessage(contextNode), identifier.text));
+        function getTypeOfVariableOrParameterOrProperty(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.type) {
+                // Handle prototype property
+                if (symbol.flags & 16777216 /* Prototype */) {
+                    return links.type = getTypeOfPrototypeProperty(symbol);
+                }
+                // Handle catch clause variables
+                var declaration = symbol.valueDeclaration;
+                if (ts.isCatchClauseVariableDeclarationOrBindingElement(declaration)) {
+                    return links.type = anyType;
+                }
+                // Handle export default expressions
+                if (declaration.kind === 243 /* ExportAssignment */) {
+                    return links.type = checkExpression(declaration.expression);
+                }
+                if (declaration.flags & 65536 /* JavaScriptFile */ && declaration.kind === 292 /* JSDocPropertyTag */ && declaration.typeExpression) {
+                    return links.type = getTypeFromTypeNode(declaration.typeExpression.type);
+                }
+                // Handle variable, parameter or property
+                if (!pushTypeResolution(symbol, 0 /* Type */)) {
+                    return unknownType;
+                }
+                var type = void 0;
+                // Handle certain special assignment kinds, which happen to union across multiple declarations:
+                // * module.exports = expr
+                // * exports.p = expr
+                // * this.p = expr
+                // * className.prototype.method = expr
+                if (declaration.kind === 194 /* BinaryExpression */ ||
+                    declaration.kind === 179 /* PropertyAccessExpression */ && declaration.parent.kind === 194 /* BinaryExpression */) {
+                    type = getWidenedTypeFromJSSpecialPropertyDeclarations(symbol);
+                }
+                else {
+                    type = getWidenedTypeForVariableLikeDeclaration(declaration, /*reportErrors*/ true);
+                }
+                if (!popTypeResolution()) {
+                    type = reportCircularityError(symbol);
                 }
+                links.type = type;
             }
+            return links.type;
         }
-        function getStrictModeEvalOrArgumentsMessage(node) {
-            // Provide specialized messages to help the user understand why we think they're in
-            // strict mode.
-            if (ts.getContainingClass(node)) {
-                return ts.Diagnostics.Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode;
+        function getAnnotatedAccessorType(accessor) {
+            if (accessor) {
+                if (accessor.kind === 153 /* GetAccessor */) {
+                    var getterTypeAnnotation = ts.getEffectiveReturnTypeNode(accessor);
+                    return getterTypeAnnotation && getTypeFromTypeNode(getterTypeAnnotation);
+                }
+                else {
+                    var setterTypeAnnotation = ts.getEffectiveSetAccessorTypeAnnotationNode(accessor);
+                    return setterTypeAnnotation && getTypeFromTypeNode(setterTypeAnnotation);
+                }
             }
-            if (file.externalModuleIndicator) {
-                return ts.Diagnostics.Invalid_use_of_0_Modules_are_automatically_in_strict_mode;
+            return undefined;
+        }
+        function getAnnotatedAccessorThisParameter(accessor) {
+            var parameter = getAccessorThisParameter(accessor);
+            return parameter && parameter.symbol;
+        }
+        function getThisTypeOfDeclaration(declaration) {
+            return getThisTypeOfSignature(getSignatureFromDeclaration(declaration));
+        }
+        function getTypeOfAccessors(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.type) {
+                var getter = ts.getDeclarationOfKind(symbol, 153 /* GetAccessor */);
+                var setter = ts.getDeclarationOfKind(symbol, 154 /* SetAccessor */);
+                if (getter && getter.flags & 65536 /* JavaScriptFile */) {
+                    var jsDocType = getTypeForDeclarationFromJSDocComment(getter);
+                    if (jsDocType) {
+                        return links.type = jsDocType;
+                    }
+                }
+                if (!pushTypeResolution(symbol, 0 /* Type */)) {
+                    return unknownType;
+                }
+                var type = void 0;
+                // First try to see if the user specified a return type on the get-accessor.
+                var getterReturnType = getAnnotatedAccessorType(getter);
+                if (getterReturnType) {
+                    type = getterReturnType;
+                }
+                else {
+                    // If the user didn't specify a return type, try to use the set-accessor's parameter type.
+                    var setterParameterType = getAnnotatedAccessorType(setter);
+                    if (setterParameterType) {
+                        type = setterParameterType;
+                    }
+                    else {
+                        // If there are no specified types, try to infer it from the body of the get accessor if it exists.
+                        if (getter && getter.body) {
+                            type = getReturnTypeFromBody(getter);
+                        }
+                        else {
+                            if (noImplicitAny) {
+                                if (setter) {
+                                    error(setter, ts.Diagnostics.Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_parameter_type_annotation, symbolToString(symbol));
+                                }
+                                else {
+                                    ts.Debug.assert(!!getter, "there must existed getter as we are current checking either setter or getter in this function");
+                                    error(getter, ts.Diagnostics.Property_0_implicitly_has_type_any_because_its_get_accessor_lacks_a_return_type_annotation, symbolToString(symbol));
+                                }
+                            }
+                            type = anyType;
+                        }
+                    }
+                }
+                if (!popTypeResolution()) {
+                    type = anyType;
+                    if (noImplicitAny) {
+                        var getter_1 = ts.getDeclarationOfKind(symbol, 153 /* GetAccessor */);
+                        error(getter_1, ts.Diagnostics._0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions, symbolToString(symbol));
+                    }
+                }
+                links.type = type;
             }
-            return ts.Diagnostics.Invalid_use_of_0_in_strict_mode;
+            return links.type;
         }
-        function checkStrictModeFunctionName(node) {
-            if (inStrictMode) {
-                // It is a SyntaxError if the identifier eval or arguments appears within a FormalParameterList of a strict mode FunctionDeclaration or FunctionExpression (13.1))
-                checkStrictModeEvalOrArguments(node, node.name);
+        function getBaseTypeVariableOfClass(symbol) {
+            var baseConstructorType = getBaseConstructorTypeOfClass(getDeclaredTypeOfClassOrInterface(symbol));
+            return baseConstructorType.flags & 540672 /* TypeVariable */ ? baseConstructorType : undefined;
+        }
+        function getTypeOfFuncClassEnumModule(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.type) {
+                if (symbol.flags & 1536 /* Module */ && ts.isShorthandAmbientModuleSymbol(symbol)) {
+                    links.type = anyType;
+                }
+                else {
+                    var type = createObjectType(16 /* Anonymous */, symbol);
+                    if (symbol.flags & 32 /* Class */) {
+                        var baseTypeVariable = getBaseTypeVariableOfClass(symbol);
+                        links.type = baseTypeVariable ? getIntersectionType([type, baseTypeVariable]) : type;
+                    }
+                    else {
+                        links.type = strictNullChecks && symbol.flags & 67108864 /* Optional */ ? getNullableType(type, 2048 /* Undefined */) : type;
+                    }
+                }
             }
+            return links.type;
         }
-        function getStrictModeBlockScopeFunctionDeclarationMessage(node) {
-            // Provide specialized messages to help the user understand why we think they're in
-            // strict mode.
-            if (ts.getContainingClass(node)) {
-                return ts.Diagnostics.Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Class_definitions_are_automatically_in_strict_mode;
+        function getTypeOfEnumMember(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.type) {
+                links.type = getDeclaredTypeOfEnumMember(symbol);
             }
-            if (file.externalModuleIndicator) {
-                return ts.Diagnostics.Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_are_automatically_in_strict_mode;
+            return links.type;
+        }
+        function getTypeOfAlias(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.type) {
+                var targetSymbol = resolveAlias(symbol);
+                // It only makes sense to get the type of a value symbol. If the result of resolving
+                // the alias is not a value, then it has no type. To get the type associated with a
+                // type symbol, call getDeclaredTypeOfSymbol.
+                // This check is important because without it, a call to getTypeOfSymbol could end
+                // up recursively calling getTypeOfAlias, causing a stack overflow.
+                links.type = targetSymbol.flags & 107455 /* Value */
+                    ? getTypeOfSymbol(targetSymbol)
+                    : unknownType;
             }
-            return ts.Diagnostics.Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5;
+            return links.type;
         }
-        function checkStrictModeFunctionDeclaration(node) {
-            if (languageVersion < 2 /* ES6 */) {
-                // Report error if function is not top level function declaration
-                if (blockScopeContainer.kind !== 256 /* SourceFile */ &&
-                    blockScopeContainer.kind !== 225 /* ModuleDeclaration */ &&
-                    !ts.isFunctionLike(blockScopeContainer)) {
-                    // We check first if the name is inside class declaration or class expression; if so give explicit message
-                    // otherwise report generic error message.
-                    var errorSpan = ts.getErrorSpanForNode(file, node);
-                    file.bindDiagnostics.push(ts.createFileDiagnostic(file, errorSpan.start, errorSpan.length, getStrictModeBlockScopeFunctionDeclarationMessage(node)));
+        function getTypeOfInstantiatedSymbol(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.type) {
+                if (symbolInstantiationDepth === 100) {
+                    error(symbol.valueDeclaration, ts.Diagnostics.Generic_type_instantiation_is_excessively_deep_and_possibly_infinite);
+                    links.type = unknownType;
+                }
+                else {
+                    if (!pushTypeResolution(symbol, 0 /* Type */)) {
+                        return unknownType;
+                    }
+                    symbolInstantiationDepth++;
+                    var type = instantiateType(getTypeOfSymbol(links.target), links.mapper);
+                    symbolInstantiationDepth--;
+                    if (!popTypeResolution()) {
+                        type = reportCircularityError(symbol);
+                    }
+                    links.type = type;
                 }
             }
+            return links.type;
         }
-        function checkStrictModeNumericLiteral(node) {
-            if (inStrictMode && node.isOctalLiteral) {
-                file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Octal_literals_are_not_allowed_in_strict_mode));
+        function reportCircularityError(symbol) {
+            // Check if variable has type annotation that circularly references the variable itself
+            if (ts.getEffectiveTypeAnnotationNode(symbol.valueDeclaration)) {
+                error(symbol.valueDeclaration, ts.Diagnostics._0_is_referenced_directly_or_indirectly_in_its_own_type_annotation, symbolToString(symbol));
+                return unknownType;
             }
-        }
-        function checkStrictModePostfixUnaryExpression(node) {
-            // Grammar checking
-            // The identifier eval or arguments may not appear as the LeftHandSideExpression of an
-            // Assignment operator(11.13) or of a PostfixExpression(11.3) or as the UnaryExpression
-            // operated upon by a Prefix Increment(11.4.4) or a Prefix Decrement(11.4.5) operator.
-            if (inStrictMode) {
-                checkStrictModeEvalOrArguments(node, node.operand);
+            // Otherwise variable has initializer that circularly references the variable itself
+            if (noImplicitAny) {
+                error(symbol.valueDeclaration, ts.Diagnostics._0_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_and_is_referenced_directly_or_indirectly_in_its_own_initializer, symbolToString(symbol));
             }
+            return anyType;
         }
-        function checkStrictModePrefixUnaryExpression(node) {
-            // Grammar checking
-            if (inStrictMode) {
-                if (node.operator === 41 /* PlusPlusToken */ || node.operator === 42 /* MinusMinusToken */) {
-                    checkStrictModeEvalOrArguments(node, node.operand);
-                }
+        function getTypeOfSymbol(symbol) {
+            if (ts.getCheckFlags(symbol) & 1 /* Instantiated */) {
+                return getTypeOfInstantiatedSymbol(symbol);
             }
-        }
-        function checkStrictModeWithStatement(node) {
-            // Grammar checking for withStatement
-            if (inStrictMode) {
-                errorOnFirstToken(node, ts.Diagnostics.with_statements_are_not_allowed_in_strict_mode);
+            if (symbol.flags & (3 /* Variable */ | 4 /* Property */)) {
+                return getTypeOfVariableOrParameterOrProperty(symbol);
+            }
+            if (symbol.flags & (16 /* Function */ | 8192 /* Method */ | 32 /* Class */ | 384 /* Enum */ | 512 /* ValueModule */)) {
+                return getTypeOfFuncClassEnumModule(symbol);
+            }
+            if (symbol.flags & 8 /* EnumMember */) {
+                return getTypeOfEnumMember(symbol);
+            }
+            if (symbol.flags & 98304 /* Accessor */) {
+                return getTypeOfAccessors(symbol);
+            }
+            if (symbol.flags & 8388608 /* Alias */) {
+                return getTypeOfAlias(symbol);
             }
+            return unknownType;
         }
-        function errorOnFirstToken(node, message, arg0, arg1, arg2) {
-            var span = ts.getSpanOfTokenAtPosition(file, node.pos);
-            file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, message, arg0, arg1, arg2));
+        function isReferenceToType(type, target) {
+            return type !== undefined
+                && target !== undefined
+                && (getObjectFlags(type) & 4 /* Reference */) !== 0
+                && type.target === target;
         }
-        function getDestructuringParameterName(node) {
-            return "__" + ts.indexOf(node.parent.parameters, node);
+        function getTargetType(type) {
+            return getObjectFlags(type) & 4 /* Reference */ ? type.target : type;
         }
-        function bind(node) {
-            if (!node) {
-                return;
-            }
-            node.parent = parent;
-            var saveInStrictMode = inStrictMode;
-            // First we bind declaration nodes to a symbol if possible. We'll both create a symbol
-            // and then potentially add the symbol to an appropriate symbol table. Possible
-            // destination symbol tables are:
-            //
-            //  1) The 'exports' table of the current container's symbol.
-            //  2) The 'members' table of the current container's symbol.
-            //  3) The 'locals' table of the current container.
-            //
-            // However, not all symbols will end up in any of these tables. 'Anonymous' symbols
-            // (like TypeLiterals for example) will not be put in any table.
-            bindWorker(node);
-            // Then we recurse into the children of the node to bind them as well. For certain
-            // symbols we do specialized work when we recurse. For example, we'll keep track of
-            // the current 'container' node when it changes. This helps us know which symbol table
-            // a local should go into for example. Since terminal nodes are known not to have
-            // children, as an optimization we don't process those.
-            if (node.kind > 138 /* LastToken */) {
-                var saveParent = parent;
-                parent = node;
-                var containerFlags = getContainerFlags(node);
-                if (containerFlags === 0 /* None */) {
-                    bindChildren(node);
+        function hasBaseType(type, checkBase) {
+            return check(type);
+            function check(type) {
+                if (getObjectFlags(type) & (3 /* ClassOrInterface */ | 4 /* Reference */)) {
+                    var target = getTargetType(type);
+                    return target === checkBase || ts.forEach(getBaseTypes(target), check);
                 }
-                else {
-                    bindContainer(node, containerFlags);
+                else if (type.flags & 131072 /* Intersection */) {
+                    return ts.forEach(type.types, check);
                 }
-                parent = saveParent;
             }
-            else if (!skipTransformFlagAggregation && (node.transformFlags & 536870912 /* HasComputedFlags */) === 0) {
-                subtreeTransformFlags |= computeTransformFlagsForNode(node, 0);
+        }
+        // Appends the type parameters given by a list of declarations to a set of type parameters and returns the resulting set.
+        // The function allocates a new array if the input type parameter set is undefined, but otherwise it modifies the set
+        // in-place and returns the same array.
+        function appendTypeParameters(typeParameters, declarations) {
+            for (var _i = 0, declarations_3 = declarations; _i < declarations_3.length; _i++) {
+                var declaration = declarations_3[_i];
+                var tp = getDeclaredTypeOfTypeParameter(getSymbolOfNode(declaration));
+                if (!typeParameters) {
+                    typeParameters = [tp];
+                }
+                else if (!ts.contains(typeParameters, tp)) {
+                    typeParameters.push(tp);
+                }
             }
-            inStrictMode = saveInStrictMode;
+            return typeParameters;
         }
-        function updateStrictModeStatementList(statements) {
-            if (!inStrictMode) {
-                for (var _i = 0, statements_1 = statements; _i < statements_1.length; _i++) {
-                    var statement = statements_1[_i];
-                    if (!ts.isPrologueDirective(statement)) {
-                        return;
-                    }
-                    if (isUseStrictPrologueDirective(statement)) {
-                        inStrictMode = true;
-                        return;
+        // Appends the outer type parameters of a node to a set of type parameters and returns the resulting set. The function
+        // allocates a new array if the input type parameter set is undefined, but otherwise it modifies the set in-place and
+        // returns the same array.
+        function appendOuterTypeParameters(typeParameters, node) {
+            while (true) {
+                node = node.parent;
+                if (!node) {
+                    return typeParameters;
+                }
+                if (node.kind === 229 /* ClassDeclaration */ || node.kind === 199 /* ClassExpression */ ||
+                    node.kind === 228 /* FunctionDeclaration */ || node.kind === 186 /* FunctionExpression */ ||
+                    node.kind === 151 /* MethodDeclaration */ || node.kind === 187 /* ArrowFunction */) {
+                    var declarations = node.typeParameters;
+                    if (declarations) {
+                        return appendTypeParameters(appendOuterTypeParameters(typeParameters, node), declarations);
                     }
                 }
             }
         }
-        /// Should be called only on prologue directives (isPrologueDirective(node) should be true)
-        function isUseStrictPrologueDirective(node) {
-            var nodeText = ts.getTextOfNodeFromSourceText(file.text, node.expression);
-            // Note: the node text must be exactly "use strict" or 'use strict'.  It is not ok for the
-            // string to contain unicode escapes (as per ES5).
-            return nodeText === '"use strict"' || nodeText === "'use strict'";
+        // The outer type parameters are those defined by enclosing generic classes, methods, or functions.
+        function getOuterTypeParametersOfClassOrInterface(symbol) {
+            var declaration = symbol.flags & 32 /* Class */ ? symbol.valueDeclaration : ts.getDeclarationOfKind(symbol, 230 /* InterfaceDeclaration */);
+            return appendOuterTypeParameters(/*typeParameters*/ undefined, declaration);
         }
-        function bindWorker(node) {
-            switch (node.kind) {
-                /* Strict mode checks */
-                case 69 /* Identifier */:
-                case 97 /* ThisKeyword */:
-                    if (currentFlow && (ts.isExpression(node) || parent.kind === 254 /* ShorthandPropertyAssignment */)) {
-                        node.flowNode = currentFlow;
-                    }
-                    return checkStrictModeIdentifier(node);
-                case 172 /* PropertyAccessExpression */:
-                    if (currentFlow && isNarrowableReference(node)) {
-                        node.flowNode = currentFlow;
-                    }
-                    break;
-                case 187 /* BinaryExpression */:
-                    if (ts.isInJavaScriptFile(node)) {
-                        var specialKind = ts.getSpecialPropertyAssignmentKind(node);
-                        switch (specialKind) {
-                            case 1 /* ExportsProperty */:
-                                bindExportsPropertyAssignment(node);
-                                break;
-                            case 2 /* ModuleExports */:
-                                bindModuleExportsAssignment(node);
-                                break;
-                            case 3 /* PrototypeProperty */:
-                                bindPrototypePropertyAssignment(node);
-                                break;
-                            case 4 /* ThisProperty */:
-                                bindThisPropertyAssignment(node);
-                                break;
-                            case 0 /* None */:
-                                // Nothing to do
-                                break;
-                            default:
-                                ts.Debug.fail("Unknown special property assignment kind");
-                        }
-                    }
-                    return checkStrictModeBinaryExpression(node);
-                case 252 /* CatchClause */:
-                    return checkStrictModeCatchClause(node);
-                case 181 /* DeleteExpression */:
-                    return checkStrictModeDeleteExpression(node);
-                case 8 /* NumericLiteral */:
-                    return checkStrictModeNumericLiteral(node);
-                case 186 /* PostfixUnaryExpression */:
-                    return checkStrictModePostfixUnaryExpression(node);
-                case 185 /* PrefixUnaryExpression */:
-                    return checkStrictModePrefixUnaryExpression(node);
-                case 212 /* WithStatement */:
-                    return checkStrictModeWithStatement(node);
-                case 165 /* ThisType */:
-                    seenThisKeyword = true;
-                    return;
-                case 154 /* TypePredicate */:
-                    return checkTypePredicate(node);
-                case 141 /* TypeParameter */:
-                    return declareSymbolAndAddToSymbolTable(node, 262144 /* TypeParameter */, 530920 /* TypeParameterExcludes */);
-                case 142 /* Parameter */:
-                    return bindParameter(node);
-                case 218 /* VariableDeclaration */:
-                case 169 /* BindingElement */:
-                    return bindVariableDeclarationOrBindingElement(node);
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
-                case 266 /* JSDocRecordMember */:
-                    return bindPropertyOrMethodOrAccessor(node, 4 /* Property */ | (node.questionToken ? 536870912 /* Optional */ : 0 /* None */), 0 /* PropertyExcludes */);
-                case 280 /* JSDocPropertyTag */:
-                    return bindJSDocProperty(node);
-                case 253 /* PropertyAssignment */:
-                case 254 /* ShorthandPropertyAssignment */:
-                    return bindPropertyOrMethodOrAccessor(node, 4 /* Property */, 0 /* PropertyExcludes */);
-                case 255 /* EnumMember */:
-                    return bindPropertyOrMethodOrAccessor(node, 8 /* EnumMember */, 900095 /* EnumMemberExcludes */);
-                case 247 /* JsxSpreadAttribute */:
-                    emitFlags |= 16384 /* HasJsxSpreadAttributes */;
-                    return;
-                case 151 /* CallSignature */:
-                case 152 /* ConstructSignature */:
-                case 153 /* IndexSignature */:
-                    return declareSymbolAndAddToSymbolTable(node, 131072 /* Signature */, 0 /* None */);
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                    // If this is an ObjectLiteralExpression method, then it sits in the same space
-                    // as other properties in the object literal.  So we use SymbolFlags.PropertyExcludes
-                    // so that it will conflict with any other object literal members with the same
-                    // name.
-                    return bindPropertyOrMethodOrAccessor(node, 8192 /* Method */ | (node.questionToken ? 536870912 /* Optional */ : 0 /* None */), ts.isObjectLiteralMethod(node) ? 0 /* PropertyExcludes */ : 99263 /* MethodExcludes */);
-                case 220 /* FunctionDeclaration */:
-                    return bindFunctionDeclaration(node);
-                case 148 /* Constructor */:
-                    return declareSymbolAndAddToSymbolTable(node, 16384 /* Constructor */, /*symbolExcludes:*/ 0 /* None */);
-                case 149 /* GetAccessor */:
-                    return bindPropertyOrMethodOrAccessor(node, 32768 /* GetAccessor */, 41919 /* GetAccessorExcludes */);
-                case 150 /* SetAccessor */:
-                    return bindPropertyOrMethodOrAccessor(node, 65536 /* SetAccessor */, 74687 /* SetAccessorExcludes */);
-                case 156 /* FunctionType */:
-                case 157 /* ConstructorType */:
-                case 269 /* JSDocFunctionType */:
-                    return bindFunctionOrConstructorType(node);
-                case 159 /* TypeLiteral */:
-                case 281 /* JSDocTypeLiteral */:
-                case 265 /* JSDocRecordType */:
-                    return bindAnonymousDeclaration(node, 2048 /* TypeLiteral */, "__type");
-                case 171 /* ObjectLiteralExpression */:
-                    return bindObjectLiteralExpression(node);
-                case 179 /* FunctionExpression */:
-                case 180 /* ArrowFunction */:
-                    return bindFunctionExpression(node);
-                case 174 /* CallExpression */:
-                    if (ts.isInJavaScriptFile(node)) {
-                        bindCallExpression(node);
-                    }
-                    break;
-                // Members of classes, interfaces, and modules
-                case 192 /* ClassExpression */:
-                case 221 /* ClassDeclaration */:
-                    // All classes are automatically in strict mode in ES6.
-                    inStrictMode = true;
-                    return bindClassLikeDeclaration(node);
-                case 222 /* InterfaceDeclaration */:
-                    return bindBlockScopedDeclaration(node, 64 /* Interface */, 792968 /* InterfaceExcludes */);
-                case 279 /* JSDocTypedefTag */:
-                case 223 /* TypeAliasDeclaration */:
-                    return bindBlockScopedDeclaration(node, 524288 /* TypeAlias */, 793064 /* TypeAliasExcludes */);
-                case 224 /* EnumDeclaration */:
-                    return bindEnumDeclaration(node);
-                case 225 /* ModuleDeclaration */:
-                    return bindModuleDeclaration(node);
-                // Imports and exports
-                case 229 /* ImportEqualsDeclaration */:
-                case 232 /* NamespaceImport */:
-                case 234 /* ImportSpecifier */:
-                case 238 /* ExportSpecifier */:
-                    return declareSymbolAndAddToSymbolTable(node, 8388608 /* Alias */, 8388608 /* AliasExcludes */);
-                case 228 /* NamespaceExportDeclaration */:
-                    return bindNamespaceExportDeclaration(node);
-                case 231 /* ImportClause */:
-                    return bindImportClause(node);
-                case 236 /* ExportDeclaration */:
-                    return bindExportDeclaration(node);
-                case 235 /* ExportAssignment */:
-                    return bindExportAssignment(node);
-                case 256 /* SourceFile */:
-                    updateStrictModeStatementList(node.statements);
-                    return bindSourceFileIfExternalModule();
-                case 199 /* Block */:
-                    if (!ts.isFunctionLike(node.parent)) {
-                        return;
+        // The local type parameters are the combined set of type parameters from all declarations of the class,
+        // interface, or type alias.
+        function getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol) {
+            var result;
+            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                var node = _a[_i];
+                if (node.kind === 230 /* InterfaceDeclaration */ || node.kind === 229 /* ClassDeclaration */ ||
+                    node.kind === 199 /* ClassExpression */ || node.kind === 231 /* TypeAliasDeclaration */) {
+                    var declaration = node;
+                    if (declaration.typeParameters) {
+                        result = appendTypeParameters(result, declaration.typeParameters);
                     }
-                // Fall through
-                case 226 /* ModuleBlock */:
-                    return updateStrictModeStatementList(node.statements);
+                }
             }
+            return result;
         }
-        function checkTypePredicate(node) {
-            var parameterName = node.parameterName, type = node.type;
-            if (parameterName && parameterName.kind === 69 /* Identifier */) {
-                checkStrictModeIdentifier(parameterName);
-            }
-            if (parameterName && parameterName.kind === 165 /* ThisType */) {
-                seenThisKeyword = true;
+        // The full set of type parameters for a generic class or interface type consists of its outer type parameters plus
+        // its locally declared type parameters.
+        function getTypeParametersOfClassOrInterface(symbol) {
+            return ts.concatenate(getOuterTypeParametersOfClassOrInterface(symbol), getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol));
+        }
+        // A type is a mixin constructor if it has a single construct signature taking no type parameters and a single
+        // rest parameter of type any[].
+        function isMixinConstructorType(type) {
+            var signatures = getSignaturesOfType(type, 1 /* Construct */);
+            if (signatures.length === 1) {
+                var s = signatures[0];
+                return !s.typeParameters && s.parameters.length === 1 && s.hasRestParameter && getTypeOfParameter(s.parameters[0]) === anyArrayType;
             }
-            bind(type);
+            return false;
         }
-        function bindSourceFileIfExternalModule() {
-            setExportContextFlag(file);
-            if (ts.isExternalModule(file)) {
-                bindSourceFileAsExternalModule();
+        function isConstructorType(type) {
+            if (isValidBaseType(type) && getSignaturesOfType(type, 1 /* Construct */).length > 0) {
+                return true;
+            }
+            if (type.flags & 540672 /* TypeVariable */) {
+                var constraint = getBaseConstraintOfType(type);
+                return constraint && isValidBaseType(constraint) && isMixinConstructorType(constraint);
             }
+            return false;
         }
-        function bindSourceFileAsExternalModule() {
-            bindAnonymousDeclaration(file, 512 /* ValueModule */, "\"" + ts.removeFileExtension(file.fileName) + "\"");
+        function getBaseTypeNodeOfClass(type) {
+            return ts.getClassExtendsHeritageClauseElement(type.symbol.valueDeclaration);
         }
-        function bindExportAssignment(node) {
-            if (!container.symbol || !container.symbol.exports) {
-                // Export assignment in some sort of block construct
-                bindAnonymousDeclaration(node, 8388608 /* Alias */, getDeclarationName(node));
-            }
-            else {
-                var flags = node.kind === 235 /* ExportAssignment */ && ts.exportAssignmentIsAlias(node)
-                    ? 8388608 /* Alias */
-                    : 4 /* Property */;
-                declareSymbol(container.symbol.exports, container.symbol, node, flags, 0 /* PropertyExcludes */ | 8388608 /* AliasExcludes */);
+        function getConstructorsForTypeArguments(type, typeArgumentNodes, location) {
+            var typeArgCount = ts.length(typeArgumentNodes);
+            var isJavaScript = ts.isInJavaScriptFile(location);
+            return ts.filter(getSignaturesOfType(type, 1 /* Construct */), function (sig) { return (isJavaScript || typeArgCount >= getMinTypeArgumentCount(sig.typeParameters)) && typeArgCount <= ts.length(sig.typeParameters); });
+        }
+        function getInstantiatedConstructorsForTypeArguments(type, typeArgumentNodes, location) {
+            var signatures = getConstructorsForTypeArguments(type, typeArgumentNodes, location);
+            var typeArguments = ts.map(typeArgumentNodes, getTypeFromTypeNode);
+            return ts.sameMap(signatures, function (sig) { return ts.some(sig.typeParameters) ? getSignatureInstantiation(sig, typeArguments) : sig; });
+        }
+        /**
+         * The base constructor of a class can resolve to
+         * * undefinedType if the class has no extends clause,
+         * * unknownType if an error occurred during resolution of the extends expression,
+         * * nullType if the extends expression is the null value,
+         * * anyType if the extends expression has type any, or
+         * * an object type with at least one construct signature.
+         */
+        function getBaseConstructorTypeOfClass(type) {
+            if (!type.resolvedBaseConstructorType) {
+                var baseTypeNode = getBaseTypeNodeOfClass(type);
+                if (!baseTypeNode) {
+                    return type.resolvedBaseConstructorType = undefinedType;
+                }
+                if (!pushTypeResolution(type, 1 /* ResolvedBaseConstructorType */)) {
+                    return unknownType;
+                }
+                var baseConstructorType = checkExpression(baseTypeNode.expression);
+                if (baseConstructorType.flags & (32768 /* Object */ | 131072 /* Intersection */)) {
+                    // Resolving the members of a class requires us to resolve the base class of that class.
+                    // We force resolution here such that we catch circularities now.
+                    resolveStructuredTypeMembers(baseConstructorType);
+                }
+                if (!popTypeResolution()) {
+                    error(type.symbol.valueDeclaration, ts.Diagnostics._0_is_referenced_directly_or_indirectly_in_its_own_base_expression, symbolToString(type.symbol));
+                    return type.resolvedBaseConstructorType = unknownType;
+                }
+                if (!(baseConstructorType.flags & 1 /* Any */) && baseConstructorType !== nullWideningType && !isConstructorType(baseConstructorType)) {
+                    error(baseTypeNode.expression, ts.Diagnostics.Type_0_is_not_a_constructor_function_type, typeToString(baseConstructorType));
+                    return type.resolvedBaseConstructorType = unknownType;
+                }
+                type.resolvedBaseConstructorType = baseConstructorType;
             }
+            return type.resolvedBaseConstructorType;
         }
-        function bindNamespaceExportDeclaration(node) {
-            if (node.modifiers && node.modifiers.length) {
-                file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Modifiers_cannot_appear_here));
+        function getBaseTypes(type) {
+            if (!type.resolvedBaseTypes) {
+                if (type.objectFlags & 8 /* Tuple */) {
+                    type.resolvedBaseTypes = [createArrayType(getUnionType(type.typeParameters))];
+                }
+                else if (type.symbol.flags & (32 /* Class */ | 64 /* Interface */)) {
+                    if (type.symbol.flags & 32 /* Class */) {
+                        resolveBaseTypesOfClass(type);
+                    }
+                    if (type.symbol.flags & 64 /* Interface */) {
+                        resolveBaseTypesOfInterface(type);
+                    }
+                }
+                else {
+                    ts.Debug.fail("type must be class or interface");
+                }
             }
-            if (node.parent.kind !== 256 /* SourceFile */) {
-                file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Global_module_exports_may_only_appear_at_top_level));
+            return type.resolvedBaseTypes;
+        }
+        function resolveBaseTypesOfClass(type) {
+            type.resolvedBaseTypes = type.resolvedBaseTypes || emptyArray;
+            var baseConstructorType = getApparentType(getBaseConstructorTypeOfClass(type));
+            if (!(baseConstructorType.flags & (32768 /* Object */ | 131072 /* Intersection */ | 1 /* Any */))) {
                 return;
             }
+            var baseTypeNode = getBaseTypeNodeOfClass(type);
+            var typeArgs = typeArgumentsFromTypeReferenceNode(baseTypeNode);
+            var baseType;
+            var originalBaseType = baseConstructorType && baseConstructorType.symbol ? getDeclaredTypeOfSymbol(baseConstructorType.symbol) : undefined;
+            if (baseConstructorType.symbol && baseConstructorType.symbol.flags & 32 /* Class */ &&
+                areAllOuterTypeParametersApplied(originalBaseType)) {
+                // When base constructor type is a class with no captured type arguments we know that the constructors all have the same type parameters as the
+                // class and all return the instance type of the class. There is no need for further checks and we can apply the
+                // type arguments in the same manner as a type reference to get the same error reporting experience.
+                baseType = getTypeFromClassOrInterfaceReference(baseTypeNode, baseConstructorType.symbol, typeArgs);
+            }
+            else if (baseConstructorType.flags & 1 /* Any */) {
+                baseType = baseConstructorType;
+            }
             else {
-                var parent_6 = node.parent;
-                if (!ts.isExternalModule(parent_6)) {
-                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Global_module_exports_may_only_appear_in_module_files));
+                // The class derives from a "class-like" constructor function, check that we have at least one construct signature
+                // with a matching number of type parameters and use the return type of the first instantiated signature. Elsewhere
+                // we check that all instantiated signatures return the same type.
+                var constructors = getInstantiatedConstructorsForTypeArguments(baseConstructorType, baseTypeNode.typeArguments, baseTypeNode);
+                if (!constructors.length) {
+                    error(baseTypeNode.expression, ts.Diagnostics.No_base_constructor_has_the_specified_number_of_type_arguments);
                     return;
                 }
-                if (!parent_6.isDeclarationFile) {
-                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Global_module_exports_may_only_appear_in_declaration_files));
-                    return;
+                baseType = getReturnTypeOfSignature(constructors[0]);
+            }
+            // In a JS file, you can use the @augments jsdoc tag to specify a base type with type parameters
+            var valueDecl = type.symbol.valueDeclaration;
+            if (valueDecl && ts.isInJavaScriptFile(valueDecl)) {
+                var augTag = ts.getJSDocAugmentsTag(type.symbol.valueDeclaration);
+                if (augTag) {
+                    baseType = getTypeFromTypeNode(augTag.typeExpression.type);
                 }
             }
-            file.symbol.globalExports = file.symbol.globalExports || ts.createMap();
-            declareSymbol(file.symbol.globalExports, file.symbol, node, 8388608 /* Alias */, 8388608 /* AliasExcludes */);
-        }
-        function bindExportDeclaration(node) {
-            if (!container.symbol || !container.symbol.exports) {
-                // Export * in some sort of block construct
-                bindAnonymousDeclaration(node, 1073741824 /* ExportStar */, getDeclarationName(node));
+            if (baseType === unknownType) {
+                return;
             }
-            else if (!node.exportClause) {
-                // All export * declarations are collected in an __export symbol
-                declareSymbol(container.symbol.exports, container.symbol, node, 1073741824 /* ExportStar */, 0 /* None */);
+            if (!isValidBaseType(baseType)) {
+                error(baseTypeNode.expression, ts.Diagnostics.Base_constructor_return_type_0_is_not_a_class_or_interface_type, typeToString(baseType));
+                return;
             }
-        }
-        function bindImportClause(node) {
-            if (node.name) {
-                declareSymbolAndAddToSymbolTable(node, 8388608 /* Alias */, 8388608 /* AliasExcludes */);
+            if (type === baseType || hasBaseType(baseType, type)) {
+                error(valueDecl, ts.Diagnostics.Type_0_recursively_references_itself_as_a_base_type, typeToString(type, /*enclosingDeclaration*/ undefined, 1 /* WriteArrayAsGenericType */));
+                return;
             }
-        }
-        function setCommonJsModuleIndicator(node) {
-            if (!file.commonJsModuleIndicator) {
-                file.commonJsModuleIndicator = node;
-                bindSourceFileAsExternalModule();
+            if (type.resolvedBaseTypes === emptyArray) {
+                type.resolvedBaseTypes = [baseType];
+            }
+            else {
+                type.resolvedBaseTypes.push(baseType);
             }
         }
-        function bindExportsPropertyAssignment(node) {
-            // When we create a property via 'exports.foo = bar', the 'exports.foo' property access
-            // expression is the declaration
-            setCommonJsModuleIndicator(node);
-            declareSymbol(file.symbol.exports, file.symbol, node.left, 4 /* Property */ | 7340032 /* Export */, 0 /* None */);
+        function areAllOuterTypeParametersApplied(type) {
+            // An unapplied type parameter has its symbol still the same as the matching argument symbol.
+            // Since parameters are applied outer-to-inner, only the last outer parameter needs to be checked.
+            var outerTypeParameters = type.outerTypeParameters;
+            if (outerTypeParameters) {
+                var last = outerTypeParameters.length - 1;
+                var typeArguments = type.typeArguments;
+                return outerTypeParameters[last].symbol !== typeArguments[last].symbol;
+            }
+            return true;
         }
-        function bindModuleExportsAssignment(node) {
-            // 'module.exports = expr' assignment
-            setCommonJsModuleIndicator(node);
-            declareSymbol(file.symbol.exports, file.symbol, node, 4 /* Property */ | 7340032 /* Export */ | 512 /* ValueModule */, 0 /* None */);
+        // A valid base type is `any`, any non-generic object type or intersection of non-generic
+        // object types.
+        function isValidBaseType(type) {
+            return type.flags & (32768 /* Object */ | 16777216 /* NonPrimitive */ | 1 /* Any */) && !isGenericMappedType(type) ||
+                type.flags & 131072 /* Intersection */ && !ts.forEach(type.types, function (t) { return !isValidBaseType(t); });
         }
-        function bindThisPropertyAssignment(node) {
-            ts.Debug.assert(ts.isInJavaScriptFile(node));
-            // Declare a 'member' if the container is an ES5 class or ES6 constructor
-            if (container.kind === 220 /* FunctionDeclaration */ || container.kind === 179 /* FunctionExpression */) {
-                container.symbol.members = container.symbol.members || ts.createMap();
-                // It's acceptable for multiple 'this' assignments of the same identifier to occur
-                declareSymbol(container.symbol.members, container.symbol, node, 4 /* Property */, 0 /* PropertyExcludes */ & ~4 /* Property */);
-            }
-            else if (container.kind === 148 /* Constructor */) {
-                // this.foo assignment in a JavaScript class
-                // Bind this property to the containing class
-                var saveContainer = container;
-                container = container.parent;
-                var symbol = bindPropertyOrMethodOrAccessor(node, 4 /* Property */, 0 /* None */);
-                if (symbol) {
-                    // constructor-declared symbols can be overwritten by subsequent method declarations
-                    symbol.isReplaceableByMethod = true;
+        function resolveBaseTypesOfInterface(type) {
+            type.resolvedBaseTypes = type.resolvedBaseTypes || emptyArray;
+            for (var _i = 0, _a = type.symbol.declarations; _i < _a.length; _i++) {
+                var declaration = _a[_i];
+                if (declaration.kind === 230 /* InterfaceDeclaration */ && ts.getInterfaceBaseTypeNodes(declaration)) {
+                    for (var _b = 0, _c = ts.getInterfaceBaseTypeNodes(declaration); _b < _c.length; _b++) {
+                        var node = _c[_b];
+                        var baseType = getTypeFromTypeNode(node);
+                        if (baseType !== unknownType) {
+                            if (isValidBaseType(baseType)) {
+                                if (type !== baseType && !hasBaseType(baseType, type)) {
+                                    if (type.resolvedBaseTypes === emptyArray) {
+                                        type.resolvedBaseTypes = [baseType];
+                                    }
+                                    else {
+                                        type.resolvedBaseTypes.push(baseType);
+                                    }
+                                }
+                                else {
+                                    error(declaration, ts.Diagnostics.Type_0_recursively_references_itself_as_a_base_type, typeToString(type, /*enclosingDeclaration*/ undefined, 1 /* WriteArrayAsGenericType */));
+                                }
+                            }
+                            else {
+                                error(node, ts.Diagnostics.An_interface_may_only_extend_a_class_or_another_interface);
+                            }
+                        }
+                    }
                 }
-                container = saveContainer;
             }
         }
-        function bindPrototypePropertyAssignment(node) {
-            // We saw a node of the form 'x.prototype.y = z'. Declare a 'member' y on x if x was a function.
-            // Look up the function in the local scope, since prototype assignments should
-            // follow the function declaration
-            var leftSideOfAssignment = node.left;
-            var classPrototype = leftSideOfAssignment.expression;
-            var constructorFunction = classPrototype.expression;
-            // Fix up parent pointers since we're going to use these nodes before we bind into them
-            leftSideOfAssignment.parent = node;
-            constructorFunction.parent = classPrototype;
-            classPrototype.parent = leftSideOfAssignment;
-            var funcSymbol = container.locals[constructorFunction.text];
-            if (!funcSymbol || !(funcSymbol.flags & 16 /* Function */ || ts.isDeclarationOfFunctionExpression(funcSymbol))) {
-                return;
-            }
-            // Set up the members collection if it doesn't exist already
-            if (!funcSymbol.members) {
-                funcSymbol.members = ts.createMap();
+        // Returns true if the interface given by the symbol is free of "this" references. Specifically, the result is
+        // true if the interface itself contains no references to "this" in its body, if all base types are interfaces,
+        // and if none of the base interfaces have a "this" type.
+        function isIndependentInterface(symbol) {
+            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                var declaration = _a[_i];
+                if (declaration.kind === 230 /* InterfaceDeclaration */) {
+                    if (declaration.flags & 64 /* ContainsThis */) {
+                        return false;
+                    }
+                    var baseTypeNodes = ts.getInterfaceBaseTypeNodes(declaration);
+                    if (baseTypeNodes) {
+                        for (var _b = 0, baseTypeNodes_1 = baseTypeNodes; _b < baseTypeNodes_1.length; _b++) {
+                            var node = baseTypeNodes_1[_b];
+                            if (ts.isEntityNameExpression(node.expression)) {
+                                var baseSymbol = resolveEntityName(node.expression, 793064 /* Type */, /*ignoreErrors*/ true);
+                                if (!baseSymbol || !(baseSymbol.flags & 64 /* Interface */) || getDeclaredTypeOfClassOrInterface(baseSymbol).thisType) {
+                                    return false;
+                                }
+                            }
+                        }
+                    }
+                }
             }
-            // Declare the method/property
-            declareSymbol(funcSymbol.members, funcSymbol, leftSideOfAssignment, 4 /* Property */, 0 /* PropertyExcludes */);
+            return true;
         }
-        function bindCallExpression(node) {
-            // We're only inspecting call expressions to detect CommonJS modules, so we can skip
-            // this check if we've already seen the module indicator
-            if (!file.commonJsModuleIndicator && ts.isRequireCall(node, /*checkArgumentIsStringLiteral*/ false)) {
-                setCommonJsModuleIndicator(node);
+        function getDeclaredTypeOfClassOrInterface(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.declaredType) {
+                var kind = symbol.flags & 32 /* Class */ ? 1 /* Class */ : 2 /* Interface */;
+                var type = links.declaredType = createObjectType(kind, symbol);
+                var outerTypeParameters = getOuterTypeParametersOfClassOrInterface(symbol);
+                var localTypeParameters = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol);
+                // A class or interface is generic if it has type parameters or a "this" type. We always give classes a "this" type
+                // because it is not feasible to analyze all members to determine if the "this" type escapes the class (in particular,
+                // property types inferred from initializers and method return types inferred from return statements are very hard
+                // to exhaustively analyze). We give interfaces a "this" type if we can't definitely determine that they are free of
+                // "this" references.
+                if (outerTypeParameters || localTypeParameters || kind === 1 /* Class */ || !isIndependentInterface(symbol)) {
+                    type.objectFlags |= 4 /* Reference */;
+                    type.typeParameters = ts.concatenate(outerTypeParameters, localTypeParameters);
+                    type.outerTypeParameters = outerTypeParameters;
+                    type.localTypeParameters = localTypeParameters;
+                    type.instantiations = ts.createMap();
+                    type.instantiations.set(getTypeListId(type.typeParameters), type);
+                    type.target = type;
+                    type.typeArguments = type.typeParameters;
+                    type.thisType = createType(16384 /* TypeParameter */);
+                    type.thisType.isThisType = true;
+                    type.thisType.symbol = symbol;
+                    type.thisType.constraint = type;
+                }
             }
+            return links.declaredType;
         }
-        function bindClassLikeDeclaration(node) {
-            if (!ts.isDeclarationFile(file) && !ts.isInAmbientContext(node)) {
-                if (ts.getClassExtendsHeritageClauseElement(node) !== undefined) {
-                    emitFlags |= 1024 /* HasClassExtends */;
+        function getDeclaredTypeOfTypeAlias(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.declaredType) {
+                // Note that we use the links object as the target here because the symbol object is used as the unique
+                // identity for resolution of the 'type' property in SymbolLinks.
+                if (!pushTypeResolution(symbol, 2 /* DeclaredType */)) {
+                    return unknownType;
                 }
-                if (ts.nodeIsDecorated(node)) {
-                    emitFlags |= 2048 /* HasDecorators */;
+                var declaration = ts.getDeclarationOfKind(symbol, 291 /* JSDocTypedefTag */);
+                var type = void 0;
+                if (declaration) {
+                    if (declaration.jsDocTypeLiteral) {
+                        type = getTypeFromTypeNode(declaration.jsDocTypeLiteral);
+                    }
+                    else {
+                        type = getTypeFromTypeNode(declaration.typeExpression.type);
+                    }
                 }
-            }
-            if (node.kind === 221 /* ClassDeclaration */) {
-                bindBlockScopedDeclaration(node, 32 /* Class */, 899519 /* ClassExcludes */);
-            }
-            else {
-                var bindingName = node.name ? node.name.text : "__class";
-                bindAnonymousDeclaration(node, 32 /* Class */, bindingName);
-                // Add name of class expression into the map for semantic classifier
-                if (node.name) {
-                    classifiableNames[node.name.text] = node.name.text;
+                else {
+                    declaration = ts.getDeclarationOfKind(symbol, 231 /* TypeAliasDeclaration */);
+                    type = getTypeFromTypeNode(declaration.type);
+                }
+                if (popTypeResolution()) {
+                    var typeParameters = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol);
+                    if (typeParameters) {
+                        // Initialize the instantiation cache for generic type aliases. The declared type corresponds to
+                        // an instantiation of the type alias with the type parameters supplied as type arguments.
+                        links.typeParameters = typeParameters;
+                        links.instantiations = ts.createMap();
+                        links.instantiations.set(getTypeListId(typeParameters), type);
+                    }
                 }
+                else {
+                    type = unknownType;
+                    error(declaration.name, ts.Diagnostics.Type_alias_0_circularly_references_itself, symbolToString(symbol));
+                }
+                links.declaredType = type;
+            }
+            return links.declaredType;
+        }
+        function isLiteralEnumMember(member) {
+            var expr = member.initializer;
+            if (!expr) {
+                return !ts.isInAmbientContext(member);
             }
-            var symbol = node.symbol;
-            // TypeScript 1.0 spec (April 2014): 8.4
-            // Every class automatically contains a static property member named 'prototype', the
-            // type of which is an instantiation of the class type with type Any supplied as a type
-            // argument for each type parameter. It is an error to explicitly declare a static
-            // property member with the name 'prototype'.
-            //
-            // Note: we check for this here because this class may be merging into a module.  The
-            // module might have an exported variable called 'prototype'.  We can't allow that as
-            // that would clash with the built-in 'prototype' for the class.
-            var prototypeSymbol = createSymbol(4 /* Property */ | 134217728 /* Prototype */, "prototype");
-            if (symbol.exports[prototypeSymbol.name]) {
-                if (node.name) {
-                    node.name.parent = node;
+            return expr.kind === 9 /* StringLiteral */ || expr.kind === 8 /* NumericLiteral */ ||
+                expr.kind === 192 /* PrefixUnaryExpression */ && expr.operator === 38 /* MinusToken */ &&
+                    expr.operand.kind === 8 /* NumericLiteral */ ||
+                expr.kind === 71 /* Identifier */ && (ts.nodeIsMissing(expr) || !!getSymbolOfNode(member.parent).exports.get(expr.text));
+        }
+        function getEnumKind(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (links.enumKind !== undefined) {
+                return links.enumKind;
+            }
+            var hasNonLiteralMember = false;
+            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                var declaration = _a[_i];
+                if (declaration.kind === 232 /* EnumDeclaration */) {
+                    for (var _b = 0, _c = declaration.members; _b < _c.length; _b++) {
+                        var member = _c[_b];
+                        if (member.initializer && member.initializer.kind === 9 /* StringLiteral */) {
+                            return links.enumKind = 1 /* Literal */;
+                        }
+                        if (!isLiteralEnumMember(member)) {
+                            hasNonLiteralMember = true;
+                        }
+                    }
                 }
-                file.bindDiagnostics.push(ts.createDiagnosticForNode(symbol.exports[prototypeSymbol.name].declarations[0], ts.Diagnostics.Duplicate_identifier_0, prototypeSymbol.name));
             }
-            symbol.exports[prototypeSymbol.name] = prototypeSymbol;
-            prototypeSymbol.parent = symbol;
+            return links.enumKind = hasNonLiteralMember ? 0 /* Numeric */ : 1 /* Literal */;
         }
-        function bindEnumDeclaration(node) {
-            return ts.isConst(node)
-                ? bindBlockScopedDeclaration(node, 128 /* ConstEnum */, 899967 /* ConstEnumExcludes */)
-                : bindBlockScopedDeclaration(node, 256 /* RegularEnum */, 899327 /* RegularEnumExcludes */);
+        function getBaseTypeOfEnumLiteralType(type) {
+            return type.flags & 256 /* EnumLiteral */ && !(type.flags & 65536 /* Union */) ? getDeclaredTypeOfSymbol(getParentOfSymbol(type.symbol)) : type;
         }
-        function bindVariableDeclarationOrBindingElement(node) {
-            if (inStrictMode) {
-                checkStrictModeEvalOrArguments(node, node.name);
+        function getDeclaredTypeOfEnum(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (links.declaredType) {
+                return links.declaredType;
             }
-            if (!ts.isBindingPattern(node.name)) {
-                if (ts.isBlockOrCatchScoped(node)) {
-                    bindBlockScopedVariableDeclaration(node);
+            if (getEnumKind(symbol) === 1 /* Literal */) {
+                enumCount++;
+                var memberTypeList = [];
+                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                    var declaration = _a[_i];
+                    if (declaration.kind === 232 /* EnumDeclaration */) {
+                        for (var _b = 0, _c = declaration.members; _b < _c.length; _b++) {
+                            var member = _c[_b];
+                            var memberType = getLiteralType(getEnumMemberValue(member), enumCount, getSymbolOfNode(member));
+                            getSymbolLinks(getSymbolOfNode(member)).declaredType = memberType;
+                            memberTypeList.push(memberType);
+                        }
+                    }
                 }
-                else if (ts.isParameterDeclaration(node)) {
-                    // It is safe to walk up parent chain to find whether the node is a destructing parameter declaration
-                    // because its parent chain has already been set up, since parents are set before descending into children.
-                    //
-                    // If node is a binding element in parameter declaration, we need to use ParameterExcludes.
-                    // Using ParameterExcludes flag allows the compiler to report an error on duplicate identifiers in Parameter Declaration
-                    // For example:
-                    //      function foo([a,a]) {} // Duplicate Identifier error
-                    //      function bar(a,a) {}   // Duplicate Identifier error, parameter declaration in this case is handled in bindParameter
-                    //                             // which correctly set excluded symbols
-                    declareSymbolAndAddToSymbolTable(node, 1 /* FunctionScopedVariable */, 107455 /* ParameterExcludes */);
+                if (memberTypeList.length) {
+                    var enumType_1 = getUnionType(memberTypeList, /*subtypeReduction*/ false, symbol, /*aliasTypeArguments*/ undefined);
+                    if (enumType_1.flags & 65536 /* Union */) {
+                        enumType_1.flags |= 256 /* EnumLiteral */;
+                        enumType_1.symbol = symbol;
+                    }
+                    return links.declaredType = enumType_1;
                 }
-                else {
-                    declareSymbolAndAddToSymbolTable(node, 1 /* FunctionScopedVariable */, 107454 /* FunctionScopedVariableExcludes */);
+            }
+            var enumType = createType(16 /* Enum */);
+            enumType.symbol = symbol;
+            return links.declaredType = enumType;
+        }
+        function getDeclaredTypeOfEnumMember(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.declaredType) {
+                var enumType = getDeclaredTypeOfEnum(getParentOfSymbol(symbol));
+                if (!links.declaredType) {
+                    links.declaredType = enumType;
                 }
             }
+            return links.declaredType;
         }
-        function bindParameter(node) {
-            if (!ts.isDeclarationFile(file) &&
-                !ts.isInAmbientContext(node) &&
-                ts.nodeIsDecorated(node)) {
-                emitFlags |= (2048 /* HasDecorators */ | 4096 /* HasParamDecorators */);
+        function getDeclaredTypeOfTypeParameter(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.declaredType) {
+                var type = createType(16384 /* TypeParameter */);
+                type.symbol = symbol;
+                links.declaredType = type;
             }
-            if (inStrictMode) {
-                // It is a SyntaxError if the identifier eval or arguments appears within a FormalParameterList of a
-                // strict mode FunctionLikeDeclaration or FunctionExpression(13.1)
-                checkStrictModeEvalOrArguments(node, node.name);
+            return links.declaredType;
+        }
+        function getDeclaredTypeOfAlias(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.declaredType) {
+                links.declaredType = getDeclaredTypeOfSymbol(resolveAlias(symbol));
             }
-            if (ts.isBindingPattern(node.name)) {
-                bindAnonymousDeclaration(node, 1 /* FunctionScopedVariable */, getDestructuringParameterName(node));
+            return links.declaredType;
+        }
+        function getDeclaredTypeOfSymbol(symbol) {
+            if (symbol.flags & (32 /* Class */ | 64 /* Interface */)) {
+                return getDeclaredTypeOfClassOrInterface(symbol);
             }
-            else {
-                declareSymbolAndAddToSymbolTable(node, 1 /* FunctionScopedVariable */, 107455 /* ParameterExcludes */);
+            if (symbol.flags & 524288 /* TypeAlias */) {
+                return getDeclaredTypeOfTypeAlias(symbol);
             }
-            // If this is a property-parameter, then also declare the property symbol into the
-            // containing class.
-            if (ts.isParameterPropertyDeclaration(node)) {
-                var classDeclaration = node.parent.parent;
-                declareSymbol(classDeclaration.symbol.members, classDeclaration.symbol, node, 4 /* Property */ | (node.questionToken ? 536870912 /* Optional */ : 0 /* None */), 0 /* PropertyExcludes */);
+            if (symbol.flags & 262144 /* TypeParameter */) {
+                return getDeclaredTypeOfTypeParameter(symbol);
             }
-        }
-        function bindFunctionDeclaration(node) {
-            if (!ts.isDeclarationFile(file) && !ts.isInAmbientContext(node)) {
-                if (ts.isAsyncFunctionLike(node)) {
-                    emitFlags |= 8192 /* HasAsyncFunctions */;
-                }
+            if (symbol.flags & 384 /* Enum */) {
+                return getDeclaredTypeOfEnum(symbol);
             }
-            checkStrictModeFunctionName(node);
-            if (inStrictMode) {
-                checkStrictModeFunctionDeclaration(node);
-                bindBlockScopedDeclaration(node, 16 /* Function */, 106927 /* FunctionExcludes */);
+            if (symbol.flags & 8 /* EnumMember */) {
+                return getDeclaredTypeOfEnumMember(symbol);
             }
-            else {
-                declareSymbolAndAddToSymbolTable(node, 16 /* Function */, 106927 /* FunctionExcludes */);
+            if (symbol.flags & 8388608 /* Alias */) {
+                return getDeclaredTypeOfAlias(symbol);
             }
+            return unknownType;
         }
-        function bindFunctionExpression(node) {
-            if (!ts.isDeclarationFile(file) && !ts.isInAmbientContext(node)) {
-                if (ts.isAsyncFunctionLike(node)) {
-                    emitFlags |= 8192 /* HasAsyncFunctions */;
+        // A type reference is considered independent if each type argument is considered independent.
+        function isIndependentTypeReference(node) {
+            if (node.typeArguments) {
+                for (var _i = 0, _a = node.typeArguments; _i < _a.length; _i++) {
+                    var typeNode = _a[_i];
+                    if (!isIndependentType(typeNode)) {
+                        return false;
+                    }
                 }
             }
-            if (currentFlow) {
-                node.flowNode = currentFlow;
-            }
-            checkStrictModeFunctionName(node);
-            var bindingName = node.name ? node.name.text : "__function";
-            return bindAnonymousDeclaration(node, 16 /* Function */, bindingName);
+            return true;
         }
-        function bindPropertyOrMethodOrAccessor(node, symbolFlags, symbolExcludes) {
-            if (!ts.isDeclarationFile(file) && !ts.isInAmbientContext(node)) {
-                if (ts.isAsyncFunctionLike(node)) {
-                    emitFlags |= 8192 /* HasAsyncFunctions */;
-                }
-                if (ts.nodeIsDecorated(node)) {
-                    emitFlags |= 2048 /* HasDecorators */;
-                }
+        // A type is considered independent if it the any, string, number, boolean, symbol, or void keyword, a string
+        // literal type, an array with an element type that is considered independent, or a type reference that is
+        // considered independent.
+        function isIndependentType(node) {
+            switch (node.kind) {
+                case 119 /* AnyKeyword */:
+                case 136 /* StringKeyword */:
+                case 133 /* NumberKeyword */:
+                case 122 /* BooleanKeyword */:
+                case 137 /* SymbolKeyword */:
+                case 134 /* ObjectKeyword */:
+                case 105 /* VoidKeyword */:
+                case 139 /* UndefinedKeyword */:
+                case 95 /* NullKeyword */:
+                case 130 /* NeverKeyword */:
+                case 173 /* LiteralType */:
+                    return true;
+                case 164 /* ArrayType */:
+                    return isIndependentType(node.elementType);
+                case 159 /* TypeReference */:
+                    return isIndependentTypeReference(node);
             }
-            return ts.hasDynamicName(node)
-                ? bindAnonymousDeclaration(node, symbolFlags, "__computed")
-                : declareSymbolAndAddToSymbolTable(node, symbolFlags, symbolExcludes);
-        }
-        function bindJSDocProperty(node) {
-            return declareSymbolAndAddToSymbolTable(node, 4 /* Property */, 0 /* PropertyExcludes */);
+            return false;
         }
-        // reachability checks
-        function shouldReportErrorOnModuleDeclaration(node) {
-            var instanceState = getModuleInstanceState(node);
-            return instanceState === 1 /* Instantiated */ || (instanceState === 2 /* ConstEnumOnly */ && options.preserveConstEnums);
+        // A variable-like declaration is considered independent (free of this references) if it has a type annotation
+        // that specifies an independent type, or if it has no type annotation and no initializer (and thus of type any).
+        function isIndependentVariableLikeDeclaration(node) {
+            var typeNode = ts.getEffectiveTypeAnnotationNode(node);
+            return typeNode ? isIndependentType(typeNode) : !node.initializer;
         }
-        function checkUnreachable(node) {
-            if (!(currentFlow.flags & 1 /* Unreachable */)) {
-                return false;
+        // A function-like declaration is considered independent (free of this references) if it has a return type
+        // annotation that is considered independent and if each parameter is considered independent.
+        function isIndependentFunctionLikeDeclaration(node) {
+            if (node.kind !== 152 /* Constructor */) {
+                var typeNode = ts.getEffectiveReturnTypeNode(node);
+                if (!typeNode || !isIndependentType(typeNode)) {
+                    return false;
+                }
             }
-            if (currentFlow === unreachableFlow) {
-                var reportError = 
-                // report error on all statements except empty ones
-                (ts.isStatementButNotDeclaration(node) && node.kind !== 201 /* EmptyStatement */) ||
-                    // report error on class declarations
-                    node.kind === 221 /* ClassDeclaration */ ||
-                    // report error on instantiated modules or const-enums only modules if preserveConstEnums is set
-                    (node.kind === 225 /* ModuleDeclaration */ && shouldReportErrorOnModuleDeclaration(node)) ||
-                    // report error on regular enums and const enums if preserveConstEnums is set
-                    (node.kind === 224 /* EnumDeclaration */ && (!ts.isConstEnumDeclaration(node) || options.preserveConstEnums));
-                if (reportError) {
-                    currentFlow = reportedUnreachableFlow;
-                    // unreachable code is reported if
-                    // - user has explicitly asked about it AND
-                    // - statement is in not ambient context (statements in ambient context is already an error
-                    //   so we should not report extras) AND
-                    //   - node is not variable statement OR
-                    //   - node is block scoped variable statement OR
-                    //   - node is not block scoped variable statement and at least one variable declaration has initializer
-                    //   Rationale: we don't want to report errors on non-initialized var's since they are hoisted
-                    //   On the other side we do want to report errors on non-initialized 'lets' because of TDZ
-                    var reportUnreachableCode = !options.allowUnreachableCode &&
-                        !ts.isInAmbientContext(node) &&
-                        (node.kind !== 200 /* VariableStatement */ ||
-                            ts.getCombinedNodeFlags(node.declarationList) & 3 /* BlockScoped */ ||
-                            ts.forEach(node.declarationList.declarations, function (d) { return d.initializer; }));
-                    if (reportUnreachableCode) {
-                        errorOnFirstToken(node, ts.Diagnostics.Unreachable_code_detected);
-                    }
+            for (var _i = 0, _a = node.parameters; _i < _a.length; _i++) {
+                var parameter = _a[_i];
+                if (!isIndependentVariableLikeDeclaration(parameter)) {
+                    return false;
                 }
             }
             return true;
         }
-    }
-    /**
-     * Computes the transform flags for a node, given the transform flags of its subtree
-     *
-     * @param node The node to analyze
-     * @param subtreeFlags Transform flags computed for this node's subtree
-     */
-    function computeTransformFlagsForNode(node, subtreeFlags) {
-        var kind = node.kind;
-        switch (kind) {
-            case 174 /* CallExpression */:
-                return computeCallExpression(node, subtreeFlags);
-            case 225 /* ModuleDeclaration */:
-                return computeModuleDeclaration(node, subtreeFlags);
-            case 178 /* ParenthesizedExpression */:
-                return computeParenthesizedExpression(node, subtreeFlags);
-            case 187 /* BinaryExpression */:
-                return computeBinaryExpression(node, subtreeFlags);
-            case 202 /* ExpressionStatement */:
-                return computeExpressionStatement(node, subtreeFlags);
-            case 142 /* Parameter */:
-                return computeParameter(node, subtreeFlags);
-            case 180 /* ArrowFunction */:
-                return computeArrowFunction(node, subtreeFlags);
-            case 179 /* FunctionExpression */:
-                return computeFunctionExpression(node, subtreeFlags);
-            case 220 /* FunctionDeclaration */:
-                return computeFunctionDeclaration(node, subtreeFlags);
-            case 218 /* VariableDeclaration */:
-                return computeVariableDeclaration(node, subtreeFlags);
-            case 219 /* VariableDeclarationList */:
-                return computeVariableDeclarationList(node, subtreeFlags);
-            case 200 /* VariableStatement */:
-                return computeVariableStatement(node, subtreeFlags);
-            case 214 /* LabeledStatement */:
-                return computeLabeledStatement(node, subtreeFlags);
-            case 221 /* ClassDeclaration */:
-                return computeClassDeclaration(node, subtreeFlags);
-            case 192 /* ClassExpression */:
-                return computeClassExpression(node, subtreeFlags);
-            case 251 /* HeritageClause */:
-                return computeHeritageClause(node, subtreeFlags);
-            case 194 /* ExpressionWithTypeArguments */:
-                return computeExpressionWithTypeArguments(node, subtreeFlags);
-            case 148 /* Constructor */:
-                return computeConstructor(node, subtreeFlags);
-            case 145 /* PropertyDeclaration */:
-                return computePropertyDeclaration(node, subtreeFlags);
-            case 147 /* MethodDeclaration */:
-                return computeMethod(node, subtreeFlags);
-            case 149 /* GetAccessor */:
-            case 150 /* SetAccessor */:
-                return computeAccessor(node, subtreeFlags);
-            case 229 /* ImportEqualsDeclaration */:
-                return computeImportEquals(node, subtreeFlags);
-            case 172 /* PropertyAccessExpression */:
-                return computePropertyAccess(node, subtreeFlags);
-            default:
-                return computeOther(node, kind, subtreeFlags);
-        }
-    }
-    ts.computeTransformFlagsForNode = computeTransformFlagsForNode;
-    function computeCallExpression(node, subtreeFlags) {
-        var transformFlags = subtreeFlags;
-        var expression = node.expression;
-        var expressionKind = expression.kind;
-        if (subtreeFlags & 262144 /* ContainsSpreadElementExpression */
-            || isSuperOrSuperProperty(expression, expressionKind)) {
-            // If the this node contains a SpreadElementExpression, or is a super call, then it is an ES6
-            // node.
-            transformFlags |= 192 /* AssertES6 */;
-        }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~537133909 /* ArrayLiteralOrCallOrNewExcludes */;
-    }
-    function isSuperOrSuperProperty(node, kind) {
-        switch (kind) {
-            case 95 /* SuperKeyword */:
-                return true;
-            case 172 /* PropertyAccessExpression */:
-            case 173 /* ElementAccessExpression */:
-                var expression = node.expression;
-                var expressionKind = expression.kind;
-                return expressionKind === 95 /* SuperKeyword */;
-        }
-        return false;
-    }
-    function computeBinaryExpression(node, subtreeFlags) {
-        var transformFlags = subtreeFlags;
-        var operatorTokenKind = node.operatorToken.kind;
-        var leftKind = node.left.kind;
-        if (operatorTokenKind === 56 /* EqualsToken */
-            && (leftKind === 171 /* ObjectLiteralExpression */
-                || leftKind === 170 /* ArrayLiteralExpression */)) {
-            // Destructuring assignments are ES6 syntax.
-            transformFlags |= 192 /* AssertES6 */ | 256 /* DestructuringAssignment */;
-        }
-        else if (operatorTokenKind === 38 /* AsteriskAsteriskToken */
-            || operatorTokenKind === 60 /* AsteriskAsteriskEqualsToken */) {
-            // Exponentiation is ES7 syntax.
-            transformFlags |= 48 /* AssertES7 */;
-        }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~536871765 /* NodeExcludes */;
-    }
-    function computeParameter(node, subtreeFlags) {
-        var transformFlags = subtreeFlags;
-        var modifierFlags = ts.getModifierFlags(node);
-        var name = node.name;
-        var initializer = node.initializer;
-        var dotDotDotToken = node.dotDotDotToken;
-        // If the parameter has a question token, then it is TypeScript syntax.
-        if (node.questionToken) {
-            transformFlags |= 3 /* AssertTypeScript */;
-        }
-        // If the parameter's name is 'this', then it is TypeScript syntax.
-        if (subtreeFlags & 2048 /* ContainsDecorators */
-            || (name && ts.isIdentifier(name) && name.originalKeywordKind === 97 /* ThisKeyword */)) {
-            transformFlags |= 3 /* AssertTypeScript */;
-        }
-        // If a parameter has an accessibility modifier, then it is TypeScript syntax.
-        if (modifierFlags & 92 /* ParameterPropertyModifier */) {
-            transformFlags |= 3 /* AssertTypeScript */ | 131072 /* ContainsParameterPropertyAssignments */;
+        // Returns true if the class or interface member given by the symbol is free of "this" references. The
+        // function may return false for symbols that are actually free of "this" references because it is not
+        // feasible to perform a complete analysis in all cases. In particular, property members with types
+        // inferred from their initializers and function members with inferred return types are conservatively
+        // assumed not to be free of "this" references.
+        function isIndependentMember(symbol) {
+            if (symbol.declarations && symbol.declarations.length === 1) {
+                var declaration = symbol.declarations[0];
+                if (declaration) {
+                    switch (declaration.kind) {
+                        case 149 /* PropertyDeclaration */:
+                        case 148 /* PropertySignature */:
+                            return isIndependentVariableLikeDeclaration(declaration);
+                        case 151 /* MethodDeclaration */:
+                        case 150 /* MethodSignature */:
+                        case 152 /* Constructor */:
+                            return isIndependentFunctionLikeDeclaration(declaration);
+                    }
+                }
+            }
+            return false;
         }
-        // If a parameter has an initializer, a binding pattern or a dotDotDot token, then
-        // it is ES6 syntax and its container must emit default value assignments or parameter destructuring downlevel.
-        if (subtreeFlags & 2097152 /* ContainsBindingPattern */ || initializer || dotDotDotToken) {
-            transformFlags |= 192 /* AssertES6 */ | 65536 /* ContainsDefaultValueAssignments */;
+        function createSymbolTable(symbols) {
+            var result = ts.createMap();
+            for (var _i = 0, symbols_1 = symbols; _i < symbols_1.length; _i++) {
+                var symbol = symbols_1[_i];
+                result.set(symbol.name, symbol);
+            }
+            return result;
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~538968917 /* ParameterExcludes */;
-    }
-    function computeParenthesizedExpression(node, subtreeFlags) {
-        var transformFlags = subtreeFlags;
-        var expression = node.expression;
-        var expressionKind = expression.kind;
-        var expressionTransformFlags = expression.transformFlags;
-        // If the node is synthesized, it means the emitter put the parentheses there,
-        // not the user. If we didn't want them, the emitter would not have put them
-        // there.
-        if (expressionKind === 195 /* AsExpression */
-            || expressionKind === 177 /* TypeAssertionExpression */) {
-            transformFlags |= 3 /* AssertTypeScript */;
+        // The mappingThisOnly flag indicates that the only type parameter being mapped is "this". When the flag is true,
+        // we check symbols to see if we can quickly conclude they are free of "this" references, thus needing no instantiation.
+        function createInstantiatedSymbolTable(symbols, mapper, mappingThisOnly) {
+            var result = ts.createMap();
+            for (var _i = 0, symbols_2 = symbols; _i < symbols_2.length; _i++) {
+                var symbol = symbols_2[_i];
+                result.set(symbol.name, mappingThisOnly && isIndependentMember(symbol) ? symbol : instantiateSymbol(symbol, mapper));
+            }
+            return result;
         }
-        // If the expression of a ParenthesizedExpression is a destructuring assignment,
-        // then the ParenthesizedExpression is a destructuring assignment.
-        if (expressionTransformFlags & 256 /* DestructuringAssignment */) {
-            transformFlags |= 256 /* DestructuringAssignment */;
+        function addInheritedMembers(symbols, baseSymbols) {
+            for (var _i = 0, baseSymbols_1 = baseSymbols; _i < baseSymbols_1.length; _i++) {
+                var s = baseSymbols_1[_i];
+                if (!symbols.has(s.name)) {
+                    symbols.set(s.name, s);
+                }
+            }
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~536871765 /* NodeExcludes */;
-    }
-    function computeClassDeclaration(node, subtreeFlags) {
-        var transformFlags;
-        var modifierFlags = ts.getModifierFlags(node);
-        if (modifierFlags & 2 /* Ambient */) {
-            // An ambient declaration is TypeScript syntax.
-            transformFlags = 3 /* AssertTypeScript */;
+        function resolveDeclaredMembers(type) {
+            if (!type.declaredProperties) {
+                var symbol = type.symbol;
+                type.declaredProperties = getNamedMembers(symbol.members);
+                type.declaredCallSignatures = getSignaturesOfSymbol(symbol.members.get("__call"));
+                type.declaredConstructSignatures = getSignaturesOfSymbol(symbol.members.get("__new"));
+                type.declaredStringIndexInfo = getIndexInfoOfSymbol(symbol, 0 /* String */);
+                type.declaredNumberIndexInfo = getIndexInfoOfSymbol(symbol, 1 /* Number */);
+            }
+            return type;
         }
-        else {
-            // A ClassDeclaration is ES6 syntax.
-            transformFlags = subtreeFlags | 192 /* AssertES6 */;
-            // A class with a parameter property assignment, property initializer, or decorator is
-            // TypeScript syntax.
-            // An exported declaration may be TypeScript syntax.
-            if ((subtreeFlags & 137216 /* TypeScriptClassSyntaxMask */)
-                || (modifierFlags & 1 /* Export */)) {
-                transformFlags |= 3 /* AssertTypeScript */;
+        function getTypeWithThisArgument(type, thisArgument) {
+            if (getObjectFlags(type) & 4 /* Reference */) {
+                var target = type.target;
+                var typeArguments = type.typeArguments;
+                if (ts.length(target.typeParameters) === ts.length(typeArguments)) {
+                    return createTypeReference(target, ts.concatenate(typeArguments, [thisArgument || target.thisType]));
+                }
             }
-            if (subtreeFlags & 32768 /* ContainsLexicalThisInComputedPropertyName */) {
-                // A computed property name containing `this` might need to be rewritten,
-                // so propagate the ContainsLexicalThis flag upward.
-                transformFlags |= 8192 /* ContainsLexicalThis */;
+            else if (type.flags & 131072 /* Intersection */) {
+                return getIntersectionType(ts.map(type.types, function (t) { return getTypeWithThisArgument(t, thisArgument); }));
             }
+            return type;
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~537590613 /* ClassExcludes */;
-    }
-    function computeClassExpression(node, subtreeFlags) {
-        // A ClassExpression is ES6 syntax.
-        var transformFlags = subtreeFlags | 192 /* AssertES6 */;
-        // A class with a parameter property assignment, property initializer, or decorator is
-        // TypeScript syntax.
-        if (subtreeFlags & 137216 /* TypeScriptClassSyntaxMask */) {
-            transformFlags |= 3 /* AssertTypeScript */;
-        }
-        if (subtreeFlags & 32768 /* ContainsLexicalThisInComputedPropertyName */) {
-            // A computed property name containing `this` might need to be rewritten,
-            // so propagate the ContainsLexicalThis flag upward.
-            transformFlags |= 8192 /* ContainsLexicalThis */;
-        }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~537590613 /* ClassExcludes */;
-    }
-    function computeHeritageClause(node, subtreeFlags) {
-        var transformFlags = subtreeFlags;
-        switch (node.token) {
-            case 83 /* ExtendsKeyword */:
-                // An `extends` HeritageClause is ES6 syntax.
-                transformFlags |= 192 /* AssertES6 */;
-                break;
-            case 106 /* ImplementsKeyword */:
-                // An `implements` HeritageClause is TypeScript syntax.
-                transformFlags |= 3 /* AssertTypeScript */;
-                break;
-            default:
-                ts.Debug.fail("Unexpected token for heritage clause");
-                break;
-        }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~536871765 /* NodeExcludes */;
-    }
-    function computeExpressionWithTypeArguments(node, subtreeFlags) {
-        // An ExpressionWithTypeArguments is ES6 syntax, as it is used in the
-        // extends clause of a class.
-        var transformFlags = subtreeFlags | 192 /* AssertES6 */;
-        // If an ExpressionWithTypeArguments contains type arguments, then it
-        // is TypeScript syntax.
-        if (node.typeArguments) {
-            transformFlags |= 3 /* AssertTypeScript */;
-        }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~536871765 /* NodeExcludes */;
-    }
-    function computeConstructor(node, subtreeFlags) {
-        var transformFlags = subtreeFlags;
-        var body = node.body;
-        if (body === undefined) {
-            // An overload constructor is TypeScript syntax.
-            transformFlags |= 3 /* AssertTypeScript */;
-        }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~550593365 /* ConstructorExcludes */;
-    }
-    function computeMethod(node, subtreeFlags) {
-        // A MethodDeclaration is ES6 syntax.
-        var transformFlags = subtreeFlags | 192 /* AssertES6 */;
-        var modifierFlags = ts.getModifierFlags(node);
-        var body = node.body;
-        var typeParameters = node.typeParameters;
-        var asteriskToken = node.asteriskToken;
-        // A MethodDeclaration is TypeScript syntax if it is either async, abstract, overloaded,
-        // generic, or has a decorator.
-        if (!body
-            || typeParameters
-            || (modifierFlags & (256 /* Async */ | 128 /* Abstract */))
-            || (subtreeFlags & 2048 /* ContainsDecorators */)) {
-            transformFlags |= 3 /* AssertTypeScript */;
+        function resolveObjectTypeMembers(type, source, typeParameters, typeArguments) {
+            var mapper;
+            var members;
+            var callSignatures;
+            var constructSignatures;
+            var stringIndexInfo;
+            var numberIndexInfo;
+            if (ts.rangeEquals(typeParameters, typeArguments, 0, typeParameters.length)) {
+                mapper = identityMapper;
+                members = source.symbol ? source.symbol.members : createSymbolTable(source.declaredProperties);
+                callSignatures = source.declaredCallSignatures;
+                constructSignatures = source.declaredConstructSignatures;
+                stringIndexInfo = source.declaredStringIndexInfo;
+                numberIndexInfo = source.declaredNumberIndexInfo;
+            }
+            else {
+                mapper = createTypeMapper(typeParameters, typeArguments);
+                members = createInstantiatedSymbolTable(source.declaredProperties, mapper, /*mappingThisOnly*/ typeParameters.length === 1);
+                callSignatures = instantiateSignatures(source.declaredCallSignatures, mapper);
+                constructSignatures = instantiateSignatures(source.declaredConstructSignatures, mapper);
+                stringIndexInfo = instantiateIndexInfo(source.declaredStringIndexInfo, mapper);
+                numberIndexInfo = instantiateIndexInfo(source.declaredNumberIndexInfo, mapper);
+            }
+            var baseTypes = getBaseTypes(source);
+            if (baseTypes.length) {
+                if (source.symbol && members === source.symbol.members) {
+                    members = createSymbolTable(source.declaredProperties);
+                }
+                var thisArgument = ts.lastOrUndefined(typeArguments);
+                for (var _i = 0, baseTypes_1 = baseTypes; _i < baseTypes_1.length; _i++) {
+                    var baseType = baseTypes_1[_i];
+                    var instantiatedBaseType = thisArgument ? getTypeWithThisArgument(instantiateType(baseType, mapper), thisArgument) : baseType;
+                    addInheritedMembers(members, getPropertiesOfType(instantiatedBaseType));
+                    callSignatures = ts.concatenate(callSignatures, getSignaturesOfType(instantiatedBaseType, 0 /* Call */));
+                    constructSignatures = ts.concatenate(constructSignatures, getSignaturesOfType(instantiatedBaseType, 1 /* Construct */));
+                    if (!stringIndexInfo) {
+                        stringIndexInfo = instantiatedBaseType === anyType ?
+                            createIndexInfo(anyType, /*isReadonly*/ false) :
+                            getIndexInfoOfType(instantiatedBaseType, 0 /* String */);
+                    }
+                    numberIndexInfo = numberIndexInfo || getIndexInfoOfType(instantiatedBaseType, 1 /* Number */);
+                }
+            }
+            setStructuredTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
         }
-        // Currently, we only support generators that were originally async function bodies.
-        if (asteriskToken && ts.getEmitFlags(node) & 2097152 /* AsyncFunctionBody */) {
-            transformFlags |= 1536 /* AssertGenerator */;
+        function resolveClassOrInterfaceMembers(type) {
+            resolveObjectTypeMembers(type, resolveDeclaredMembers(type), emptyArray, emptyArray);
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~550593365 /* MethodOrAccessorExcludes */;
-    }
-    function computeAccessor(node, subtreeFlags) {
-        var transformFlags = subtreeFlags;
-        var modifierFlags = ts.getModifierFlags(node);
-        var body = node.body;
-        // A MethodDeclaration is TypeScript syntax if it is either async, abstract, overloaded,
-        // generic, or has a decorator.
-        if (!body
-            || (modifierFlags & (256 /* Async */ | 128 /* Abstract */))
-            || (subtreeFlags & 2048 /* ContainsDecorators */)) {
-            transformFlags |= 3 /* AssertTypeScript */;
+        function resolveTypeReferenceMembers(type) {
+            var source = resolveDeclaredMembers(type.target);
+            var typeParameters = ts.concatenate(source.typeParameters, [source.thisType]);
+            var typeArguments = type.typeArguments && type.typeArguments.length === typeParameters.length ?
+                type.typeArguments : ts.concatenate(type.typeArguments, [type]);
+            resolveObjectTypeMembers(type, source, typeParameters, typeArguments);
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~550593365 /* MethodOrAccessorExcludes */;
-    }
-    function computePropertyDeclaration(node, subtreeFlags) {
-        // A PropertyDeclaration is TypeScript syntax.
-        var transformFlags = subtreeFlags | 3 /* AssertTypeScript */;
-        // If the PropertyDeclaration has an initializer, we need to inform its ancestor
-        // so that it handle the transformation.
-        if (node.initializer) {
-            transformFlags |= 4096 /* ContainsPropertyInitializer */;
+        function createSignature(declaration, typeParameters, thisParameter, parameters, resolvedReturnType, typePredicate, minArgumentCount, hasRestParameter, hasLiteralTypes) {
+            var sig = new Signature(checker);
+            sig.declaration = declaration;
+            sig.typeParameters = typeParameters;
+            sig.parameters = parameters;
+            sig.thisParameter = thisParameter;
+            sig.resolvedReturnType = resolvedReturnType;
+            sig.typePredicate = typePredicate;
+            sig.minArgumentCount = minArgumentCount;
+            sig.hasRestParameter = hasRestParameter;
+            sig.hasLiteralTypes = hasLiteralTypes;
+            return sig;
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~536871765 /* NodeExcludes */;
-    }
-    function computeFunctionDeclaration(node, subtreeFlags) {
-        var transformFlags;
-        var modifierFlags = ts.getModifierFlags(node);
-        var body = node.body;
-        var asteriskToken = node.asteriskToken;
-        if (!body || (modifierFlags & 2 /* Ambient */)) {
-            // An ambient declaration is TypeScript syntax.
-            // A FunctionDeclaration without a body is an overload and is TypeScript syntax.
-            transformFlags = 3 /* AssertTypeScript */;
+        function cloneSignature(sig) {
+            return createSignature(sig.declaration, sig.typeParameters, sig.thisParameter, sig.parameters, sig.resolvedReturnType, sig.typePredicate, sig.minArgumentCount, sig.hasRestParameter, sig.hasLiteralTypes);
         }
-        else {
-            transformFlags = subtreeFlags | 8388608 /* ContainsHoistedDeclarationOrCompletion */;
-            // If a FunctionDeclaration is exported, then it is either ES6 or TypeScript syntax.
-            if (modifierFlags & 1 /* Export */) {
-                transformFlags |= 3 /* AssertTypeScript */ | 192 /* AssertES6 */;
+        function getDefaultConstructSignatures(classType) {
+            var baseConstructorType = getBaseConstructorTypeOfClass(classType);
+            var baseSignatures = getSignaturesOfType(baseConstructorType, 1 /* Construct */);
+            if (baseSignatures.length === 0) {
+                return [createSignature(undefined, classType.localTypeParameters, undefined, emptyArray, classType, /*typePredicate*/ undefined, 0, /*hasRestParameter*/ false, /*hasLiteralTypes*/ false)];
             }
-            // If a FunctionDeclaration is async, then it is TypeScript syntax.
-            if (modifierFlags & 256 /* Async */) {
-                transformFlags |= 3 /* AssertTypeScript */;
+            var baseTypeNode = getBaseTypeNodeOfClass(classType);
+            var isJavaScript = ts.isInJavaScriptFile(baseTypeNode);
+            var typeArguments = typeArgumentsFromTypeReferenceNode(baseTypeNode);
+            var typeArgCount = ts.length(typeArguments);
+            var result = [];
+            for (var _i = 0, baseSignatures_1 = baseSignatures; _i < baseSignatures_1.length; _i++) {
+                var baseSig = baseSignatures_1[_i];
+                var minTypeArgumentCount = getMinTypeArgumentCount(baseSig.typeParameters);
+                var typeParamCount = ts.length(baseSig.typeParameters);
+                if ((isJavaScript || typeArgCount >= minTypeArgumentCount) && typeArgCount <= typeParamCount) {
+                    var sig = typeParamCount ? createSignatureInstantiation(baseSig, fillMissingTypeArguments(typeArguments, baseSig.typeParameters, minTypeArgumentCount, baseTypeNode)) : cloneSignature(baseSig);
+                    sig.typeParameters = classType.localTypeParameters;
+                    sig.resolvedReturnType = classType;
+                    result.push(sig);
+                }
             }
-            // If a FunctionDeclaration's subtree has marked the container as needing to capture the
-            // lexical this, or the function contains parameters with initializers, then this node is
-            // ES6 syntax.
-            if (subtreeFlags & 81920 /* ES6FunctionSyntaxMask */) {
-                transformFlags |= 192 /* AssertES6 */;
+            return result;
+        }
+        function findMatchingSignature(signatureList, signature, partialMatch, ignoreThisTypes, ignoreReturnTypes) {
+            for (var _i = 0, signatureList_1 = signatureList; _i < signatureList_1.length; _i++) {
+                var s = signatureList_1[_i];
+                if (compareSignaturesIdentical(s, signature, partialMatch, ignoreThisTypes, ignoreReturnTypes, compareTypesIdentical)) {
+                    return s;
+                }
+            }
+        }
+        function findMatchingSignatures(signatureLists, signature, listIndex) {
+            if (signature.typeParameters) {
+                // We require an exact match for generic signatures, so we only return signatures from the first
+                // signature list and only if they have exact matches in the other signature lists.
+                if (listIndex > 0) {
+                    return undefined;
+                }
+                for (var i = 1; i < signatureLists.length; i++) {
+                    if (!findMatchingSignature(signatureLists[i], signature, /*partialMatch*/ false, /*ignoreThisTypes*/ false, /*ignoreReturnTypes*/ false)) {
+                        return undefined;
+                    }
+                }
+                return [signature];
             }
-            // If a FunctionDeclaration is generator function and is the body of a
-            // transformed async function, then this node can be transformed to a
-            // down-level generator.
-            // Currently we do not support transforming any other generator fucntions
-            // down level.
-            if (asteriskToken && ts.getEmitFlags(node) & 2097152 /* AsyncFunctionBody */) {
-                transformFlags |= 1536 /* AssertGenerator */;
+            var result = undefined;
+            for (var i = 0; i < signatureLists.length; i++) {
+                // Allow matching non-generic signatures to have excess parameters and different return types
+                var match = i === listIndex ? signature : findMatchingSignature(signatureLists[i], signature, /*partialMatch*/ true, /*ignoreThisTypes*/ true, /*ignoreReturnTypes*/ true);
+                if (!match) {
+                    return undefined;
+                }
+                if (!ts.contains(result, match)) {
+                    (result || (result = [])).push(match);
+                }
             }
+            return result;
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~550726485 /* FunctionExcludes */;
-    }
-    function computeFunctionExpression(node, subtreeFlags) {
-        var transformFlags = subtreeFlags;
-        var modifierFlags = ts.getModifierFlags(node);
-        var asteriskToken = node.asteriskToken;
-        // An async function expression is TypeScript syntax.
-        if (modifierFlags & 256 /* Async */) {
-            transformFlags |= 3 /* AssertTypeScript */;
+        // The signatures of a union type are those signatures that are present in each of the constituent types.
+        // Generic signatures must match exactly, but non-generic signatures are allowed to have extra optional
+        // parameters and may differ in return types. When signatures differ in return types, the resulting return
+        // type is the union of the constituent return types.
+        function getUnionSignatures(types, kind) {
+            var signatureLists = ts.map(types, function (t) { return getSignaturesOfType(t, kind); });
+            var result = undefined;
+            for (var i = 0; i < signatureLists.length; i++) {
+                for (var _i = 0, _a = signatureLists[i]; _i < _a.length; _i++) {
+                    var signature = _a[_i];
+                    // Only process signatures with parameter lists that aren't already in the result list
+                    if (!result || !findMatchingSignature(result, signature, /*partialMatch*/ false, /*ignoreThisTypes*/ true, /*ignoreReturnTypes*/ true)) {
+                        var unionSignatures = findMatchingSignatures(signatureLists, signature, i);
+                        if (unionSignatures) {
+                            var s = signature;
+                            // Union the result types when more than one signature matches
+                            if (unionSignatures.length > 1) {
+                                s = cloneSignature(signature);
+                                if (ts.forEach(unionSignatures, function (sig) { return sig.thisParameter; })) {
+                                    var thisType = getUnionType(ts.map(unionSignatures, function (sig) { return getTypeOfSymbol(sig.thisParameter) || anyType; }), /*subtypeReduction*/ true);
+                                    s.thisParameter = createSymbolWithType(signature.thisParameter, thisType);
+                                }
+                                // Clear resolved return type we possibly got from cloneSignature
+                                s.resolvedReturnType = undefined;
+                                s.unionSignatures = unionSignatures;
+                            }
+                            (result || (result = [])).push(s);
+                        }
+                    }
+                }
+            }
+            return result || emptyArray;
         }
-        // If a FunctionExpression's subtree has marked the container as needing to capture the
-        // lexical this, or the function contains parameters with initializers, then this node is
-        // ES6 syntax.
-        if (subtreeFlags & 81920 /* ES6FunctionSyntaxMask */) {
-            transformFlags |= 192 /* AssertES6 */;
+        function getUnionIndexInfo(types, kind) {
+            var indexTypes = [];
+            var isAnyReadonly = false;
+            for (var _i = 0, types_1 = types; _i < types_1.length; _i++) {
+                var type = types_1[_i];
+                var indexInfo = getIndexInfoOfType(type, kind);
+                if (!indexInfo) {
+                    return undefined;
+                }
+                indexTypes.push(indexInfo.type);
+                isAnyReadonly = isAnyReadonly || indexInfo.isReadonly;
+            }
+            return createIndexInfo(getUnionType(indexTypes, /*subtypeReduction*/ true), isAnyReadonly);
         }
-        // If a FunctionExpression is generator function and is the body of a
-        // transformed async function, then this node can be transformed to a
-        // down-level generator.
-        // Currently we do not support transforming any other generator fucntions
-        // down level.
-        if (asteriskToken && ts.getEmitFlags(node) & 2097152 /* AsyncFunctionBody */) {
-            transformFlags |= 1536 /* AssertGenerator */;
+        function resolveUnionTypeMembers(type) {
+            // The members and properties collections are empty for union types. To get all properties of a union
+            // type use getPropertiesOfType (only the language service uses this).
+            var callSignatures = getUnionSignatures(type.types, 0 /* Call */);
+            var constructSignatures = getUnionSignatures(type.types, 1 /* Construct */);
+            var stringIndexInfo = getUnionIndexInfo(type.types, 0 /* String */);
+            var numberIndexInfo = getUnionIndexInfo(type.types, 1 /* Number */);
+            setStructuredTypeMembers(type, emptySymbols, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~550726485 /* FunctionExcludes */;
-    }
-    function computeArrowFunction(node, subtreeFlags) {
-        // An ArrowFunction is ES6 syntax, and excludes markers that should not escape the scope of an ArrowFunction.
-        var transformFlags = subtreeFlags | 192 /* AssertES6 */;
-        var modifierFlags = ts.getModifierFlags(node);
-        // An async arrow function is TypeScript syntax.
-        if (modifierFlags & 256 /* Async */) {
-            transformFlags |= 3 /* AssertTypeScript */;
+        function intersectTypes(type1, type2) {
+            return !type1 ? type2 : !type2 ? type1 : getIntersectionType([type1, type2]);
         }
-        // If an ArrowFunction contains a lexical this, its container must capture the lexical this.
-        if (subtreeFlags & 8192 /* ContainsLexicalThis */) {
-            transformFlags |= 16384 /* ContainsCapturedLexicalThis */;
+        function intersectIndexInfos(info1, info2) {
+            return !info1 ? info2 : !info2 ? info1 : createIndexInfo(getIntersectionType([info1.type, info2.type]), info1.isReadonly && info2.isReadonly);
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~550710101 /* ArrowFunctionExcludes */;
-    }
-    function computePropertyAccess(node, subtreeFlags) {
-        var transformFlags = subtreeFlags;
-        var expression = node.expression;
-        var expressionKind = expression.kind;
-        // If a PropertyAccessExpression starts with a super keyword, then it is
-        // ES6 syntax, and requires a lexical `this` binding.
-        if (expressionKind === 95 /* SuperKeyword */) {
-            transformFlags |= 8192 /* ContainsLexicalThis */;
+        function unionSpreadIndexInfos(info1, info2) {
+            return info1 && info2 && createIndexInfo(getUnionType([info1.type, info2.type]), info1.isReadonly || info2.isReadonly);
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~536871765 /* NodeExcludes */;
-    }
-    function computeVariableDeclaration(node, subtreeFlags) {
-        var transformFlags = subtreeFlags;
-        var nameKind = node.name.kind;
-        // A VariableDeclaration with a binding pattern is ES6 syntax.
-        if (nameKind === 167 /* ObjectBindingPattern */ || nameKind === 168 /* ArrayBindingPattern */) {
-            transformFlags |= 192 /* AssertES6 */ | 2097152 /* ContainsBindingPattern */;
+        function includeMixinType(type, types, index) {
+            var mixedTypes = [];
+            for (var i = 0; i < types.length; i++) {
+                if (i === index) {
+                    mixedTypes.push(type);
+                }
+                else if (isMixinConstructorType(types[i])) {
+                    mixedTypes.push(getReturnTypeOfSignature(getSignaturesOfType(types[i], 1 /* Construct */)[0]));
+                }
+            }
+            return getIntersectionType(mixedTypes);
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~536871765 /* NodeExcludes */;
-    }
-    function computeVariableStatement(node, subtreeFlags) {
-        var transformFlags;
-        var modifierFlags = ts.getModifierFlags(node);
-        var declarationListTransformFlags = node.declarationList.transformFlags;
-        // An ambient declaration is TypeScript syntax.
-        if (modifierFlags & 2 /* Ambient */) {
-            transformFlags = 3 /* AssertTypeScript */;
+        function resolveIntersectionTypeMembers(type) {
+            // The members and properties collections are empty for intersection types. To get all properties of an
+            // intersection type use getPropertiesOfType (only the language service uses this).
+            var callSignatures = emptyArray;
+            var constructSignatures = emptyArray;
+            var stringIndexInfo;
+            var numberIndexInfo;
+            var types = type.types;
+            var mixinCount = ts.countWhere(types, isMixinConstructorType);
+            var _loop_3 = function (i) {
+                var t = type.types[i];
+                // When an intersection type contains mixin constructor types, the construct signatures from
+                // those types are discarded and their return types are mixed into the return types of all
+                // other construct signatures in the intersection type. For example, the intersection type
+                // '{ new(...args: any[]) => A } & { new(s: string) => B }' has a single construct signature
+                // 'new(s: string) => A & B'.
+                if (mixinCount === 0 || mixinCount === types.length && i === 0 || !isMixinConstructorType(t)) {
+                    var signatures = getSignaturesOfType(t, 1 /* Construct */);
+                    if (signatures.length && mixinCount > 0) {
+                        signatures = ts.map(signatures, function (s) {
+                            var clone = cloneSignature(s);
+                            clone.resolvedReturnType = includeMixinType(getReturnTypeOfSignature(s), types, i);
+                            return clone;
+                        });
+                    }
+                    constructSignatures = ts.concatenate(constructSignatures, signatures);
+                }
+                callSignatures = ts.concatenate(callSignatures, getSignaturesOfType(t, 0 /* Call */));
+                stringIndexInfo = intersectIndexInfos(stringIndexInfo, getIndexInfoOfType(t, 0 /* String */));
+                numberIndexInfo = intersectIndexInfos(numberIndexInfo, getIndexInfoOfType(t, 1 /* Number */));
+            };
+            for (var i = 0; i < types.length; i++) {
+                _loop_3(i);
+            }
+            setStructuredTypeMembers(type, emptySymbols, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
         }
-        else {
-            transformFlags = subtreeFlags;
-            // If a VariableStatement is exported, then it is either ES6 or TypeScript syntax.
-            if (modifierFlags & 1 /* Export */) {
-                transformFlags |= 192 /* AssertES6 */ | 3 /* AssertTypeScript */;
+        /**
+         * Converts an AnonymousType to a ResolvedType.
+         */
+        function resolveAnonymousTypeMembers(type) {
+            var symbol = type.symbol;
+            if (type.target) {
+                var members = createInstantiatedSymbolTable(getPropertiesOfObjectType(type.target), type.mapper, /*mappingThisOnly*/ false);
+                var callSignatures = instantiateSignatures(getSignaturesOfType(type.target, 0 /* Call */), type.mapper);
+                var constructSignatures = instantiateSignatures(getSignaturesOfType(type.target, 1 /* Construct */), type.mapper);
+                var stringIndexInfo = instantiateIndexInfo(getIndexInfoOfType(type.target, 0 /* String */), type.mapper);
+                var numberIndexInfo = instantiateIndexInfo(getIndexInfoOfType(type.target, 1 /* Number */), type.mapper);
+                setStructuredTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
             }
-            if (declarationListTransformFlags & 2097152 /* ContainsBindingPattern */) {
-                transformFlags |= 192 /* AssertES6 */;
+            else if (symbol.flags & 2048 /* TypeLiteral */) {
+                var members = symbol.members;
+                var callSignatures = getSignaturesOfSymbol(members.get("__call"));
+                var constructSignatures = getSignaturesOfSymbol(members.get("__new"));
+                var stringIndexInfo = getIndexInfoOfSymbol(symbol, 0 /* String */);
+                var numberIndexInfo = getIndexInfoOfSymbol(symbol, 1 /* Number */);
+                setStructuredTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+            }
+            else {
+                // Combinations of function, class, enum and module
+                var members = emptySymbols;
+                var constructSignatures = emptyArray;
+                var stringIndexInfo = undefined;
+                if (symbol.exports) {
+                    members = getExportsOfSymbol(symbol);
+                }
+                if (symbol.flags & 32 /* Class */) {
+                    var classType = getDeclaredTypeOfClassOrInterface(symbol);
+                    constructSignatures = getSignaturesOfSymbol(symbol.members.get("__constructor"));
+                    if (!constructSignatures.length) {
+                        constructSignatures = getDefaultConstructSignatures(classType);
+                    }
+                    var baseConstructorType = getBaseConstructorTypeOfClass(classType);
+                    if (baseConstructorType.flags & (32768 /* Object */ | 131072 /* Intersection */ | 540672 /* TypeVariable */)) {
+                        members = createSymbolTable(getNamedMembers(members));
+                        addInheritedMembers(members, getPropertiesOfType(baseConstructorType));
+                    }
+                    else if (baseConstructorType === anyType) {
+                        stringIndexInfo = createIndexInfo(anyType, /*isReadonly*/ false);
+                    }
+                }
+                var numberIndexInfo = symbol.flags & 384 /* Enum */ ? enumNumberIndexInfo : undefined;
+                setStructuredTypeMembers(type, members, emptyArray, constructSignatures, stringIndexInfo, numberIndexInfo);
+                // We resolve the members before computing the signatures because a signature may use
+                // typeof with a qualified name expression that circularly references the type we are
+                // in the process of resolving (see issue #6072). The temporarily empty signature list
+                // will never be observed because a qualified name can't reference signatures.
+                if (symbol.flags & (16 /* Function */ | 8192 /* Method */)) {
+                    type.callSignatures = getSignaturesOfSymbol(symbol);
+                }
             }
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~536871765 /* NodeExcludes */;
-    }
-    function computeLabeledStatement(node, subtreeFlags) {
-        var transformFlags = subtreeFlags;
-        // A labeled statement containing a block scoped binding *may* need to be transformed from ES6.
-        if (subtreeFlags & 1048576 /* ContainsBlockScopedBinding */
-            && ts.isIterationStatement(node, /*lookInLabeledStatements*/ true)) {
-            transformFlags |= 192 /* AssertES6 */;
-        }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~536871765 /* NodeExcludes */;
-    }
-    function computeImportEquals(node, subtreeFlags) {
-        var transformFlags = subtreeFlags;
-        // An ImportEqualsDeclaration with a namespace reference is TypeScript.
-        if (!ts.isExternalModuleImportEqualsDeclaration(node)) {
-            transformFlags |= 3 /* AssertTypeScript */;
-        }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~536871765 /* NodeExcludes */;
-    }
-    function computeExpressionStatement(node, subtreeFlags) {
-        var transformFlags = subtreeFlags;
-        // If the expression of an expression statement is a destructuring assignment,
-        // then we treat the statement as ES6 so that we can indicate that we do not
-        // need to hold on to the right-hand side.
-        if (node.expression.transformFlags & 256 /* DestructuringAssignment */) {
-            transformFlags |= 192 /* AssertES6 */;
+        /** Resolve the members of a mapped type { [P in K]: T } */
+        function resolveMappedTypeMembers(type) {
+            var members = ts.createMap();
+            var stringIndexInfo;
+            // Resolve upfront such that recursive references see an empty object type.
+            setStructuredTypeMembers(type, emptySymbols, emptyArray, emptyArray, undefined, undefined);
+            // In { [P in K]: T }, we refer to P as the type parameter type, K as the constraint type,
+            // and T as the template type.
+            var typeParameter = getTypeParameterFromMappedType(type);
+            var constraintType = getConstraintTypeFromMappedType(type);
+            var templateType = getTemplateTypeFromMappedType(type);
+            var modifiersType = getApparentType(getModifiersTypeFromMappedType(type)); // The 'T' in 'keyof T'
+            var templateReadonly = !!type.declaration.readonlyToken;
+            var templateOptional = !!type.declaration.questionToken;
+            if (type.declaration.typeParameter.constraint.kind === 170 /* TypeOperator */) {
+                // We have a { [P in keyof T]: X }
+                for (var _i = 0, _a = getPropertiesOfType(modifiersType); _i < _a.length; _i++) {
+                    var propertySymbol = _a[_i];
+                    addMemberForKeyType(getLiteralTypeFromPropertyName(propertySymbol), propertySymbol);
+                }
+                if (getIndexInfoOfType(modifiersType, 0 /* String */)) {
+                    addMemberForKeyType(stringType);
+                }
+            }
+            else {
+                // First, if the constraint type is a type parameter, obtain the base constraint. Then,
+                // if the key type is a 'keyof X', obtain 'keyof C' where C is the base constraint of X.
+                // Finally, iterate over the constituents of the resulting iteration type.
+                var keyType = constraintType.flags & 540672 /* TypeVariable */ ? getApparentType(constraintType) : constraintType;
+                var iterationType = keyType.flags & 262144 /* Index */ ? getIndexType(getApparentType(keyType.type)) : keyType;
+                forEachType(iterationType, addMemberForKeyType);
+            }
+            setStructuredTypeMembers(type, members, emptyArray, emptyArray, stringIndexInfo, undefined);
+            function addMemberForKeyType(t, propertySymbol) {
+                // Create a mapper from T to the current iteration type constituent. Then, if the
+                // mapped type is itself an instantiated type, combine the iteration mapper with the
+                // instantiation mapper.
+                var iterationMapper = createTypeMapper([typeParameter], [t]);
+                var templateMapper = type.mapper ? combineTypeMappers(type.mapper, iterationMapper) : iterationMapper;
+                var propType = instantiateType(templateType, templateMapper);
+                // If the current iteration type constituent is a string literal type, create a property.
+                // Otherwise, for type string create a string index signature.
+                if (t.flags & 32 /* StringLiteral */) {
+                    var propName = t.value;
+                    var modifiersProp = getPropertyOfType(modifiersType, propName);
+                    var isOptional = templateOptional || !!(modifiersProp && modifiersProp.flags & 67108864 /* Optional */);
+                    var prop = createSymbol(4 /* Property */ | (isOptional ? 67108864 /* Optional */ : 0), propName);
+                    prop.checkFlags = templateReadonly || modifiersProp && isReadonlySymbol(modifiersProp) ? 8 /* Readonly */ : 0;
+                    prop.type = propType;
+                    if (propertySymbol) {
+                        prop.syntheticOrigin = propertySymbol;
+                        prop.declarations = propertySymbol.declarations;
+                    }
+                    members.set(propName, prop);
+                }
+                else if (t.flags & 2 /* String */) {
+                    stringIndexInfo = createIndexInfo(propType, templateReadonly);
+                }
+            }
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~536871765 /* NodeExcludes */;
-    }
-    function computeModuleDeclaration(node, subtreeFlags) {
-        var transformFlags = 3 /* AssertTypeScript */;
-        var modifierFlags = ts.getModifierFlags(node);
-        if ((modifierFlags & 2 /* Ambient */) === 0) {
-            transformFlags |= subtreeFlags;
+        function getTypeParameterFromMappedType(type) {
+            return type.typeParameter ||
+                (type.typeParameter = getDeclaredTypeOfTypeParameter(getSymbolOfNode(type.declaration.typeParameter)));
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~546335573 /* ModuleExcludes */;
-    }
-    function computeVariableDeclarationList(node, subtreeFlags) {
-        var transformFlags = subtreeFlags | 8388608 /* ContainsHoistedDeclarationOrCompletion */;
-        if (subtreeFlags & 2097152 /* ContainsBindingPattern */) {
-            transformFlags |= 192 /* AssertES6 */;
+        function getConstraintTypeFromMappedType(type) {
+            return type.constraintType ||
+                (type.constraintType = instantiateType(getConstraintOfTypeParameter(getTypeParameterFromMappedType(type)), type.mapper || identityMapper) || unknownType);
         }
-        // If a VariableDeclarationList is `let` or `const`, then it is ES6 syntax.
-        if (node.flags & 3 /* BlockScoped */) {
-            transformFlags |= 192 /* AssertES6 */ | 1048576 /* ContainsBlockScopedBinding */;
+        function getTemplateTypeFromMappedType(type) {
+            return type.templateType ||
+                (type.templateType = type.declaration.type ?
+                    instantiateType(addOptionality(getTypeFromTypeNode(type.declaration.type), !!type.declaration.questionToken), type.mapper || identityMapper) :
+                    unknownType);
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~538968917 /* VariableDeclarationListExcludes */;
-    }
-    function computeOther(node, kind, subtreeFlags) {
-        // Mark transformations needed for each node
-        var transformFlags = subtreeFlags;
-        var excludeFlags = 536871765 /* NodeExcludes */;
-        switch (kind) {
-            case 112 /* PublicKeyword */:
-            case 110 /* PrivateKeyword */:
-            case 111 /* ProtectedKeyword */:
-            case 115 /* AbstractKeyword */:
-            case 122 /* DeclareKeyword */:
-            case 118 /* AsyncKeyword */:
-            case 74 /* ConstKeyword */:
-            case 184 /* AwaitExpression */:
-            case 224 /* EnumDeclaration */:
-            case 255 /* EnumMember */:
-            case 177 /* TypeAssertionExpression */:
-            case 195 /* AsExpression */:
-            case 196 /* NonNullExpression */:
-            case 128 /* ReadonlyKeyword */:
-                // These nodes are TypeScript syntax.
-                transformFlags |= 3 /* AssertTypeScript */;
-                break;
-            case 241 /* JsxElement */:
-            case 242 /* JsxSelfClosingElement */:
-            case 243 /* JsxOpeningElement */:
-            case 244 /* JsxText */:
-            case 245 /* JsxClosingElement */:
-            case 246 /* JsxAttribute */:
-            case 247 /* JsxSpreadAttribute */:
-            case 248 /* JsxExpression */:
-                // These nodes are Jsx syntax.
-                transformFlags |= 12 /* AssertJsx */;
-                break;
-            case 82 /* ExportKeyword */:
-                // This node is both ES6 and TypeScript syntax.
-                transformFlags |= 192 /* AssertES6 */ | 3 /* AssertTypeScript */;
-                break;
-            case 77 /* DefaultKeyword */:
-            case 11 /* NoSubstitutionTemplateLiteral */:
-            case 12 /* TemplateHead */:
-            case 13 /* TemplateMiddle */:
-            case 14 /* TemplateTail */:
-            case 189 /* TemplateExpression */:
-            case 176 /* TaggedTemplateExpression */:
-            case 254 /* ShorthandPropertyAssignment */:
-            case 208 /* ForOfStatement */:
-                // These nodes are ES6 syntax.
-                transformFlags |= 192 /* AssertES6 */;
-                break;
-            case 190 /* YieldExpression */:
-                // This node is ES6 syntax.
-                transformFlags |= 192 /* AssertES6 */ | 4194304 /* ContainsYield */;
-                break;
-            case 117 /* AnyKeyword */:
-            case 130 /* NumberKeyword */:
-            case 127 /* NeverKeyword */:
-            case 132 /* StringKeyword */:
-            case 120 /* BooleanKeyword */:
-            case 133 /* SymbolKeyword */:
-            case 103 /* VoidKeyword */:
-            case 141 /* TypeParameter */:
-            case 144 /* PropertySignature */:
-            case 146 /* MethodSignature */:
-            case 151 /* CallSignature */:
-            case 152 /* ConstructSignature */:
-            case 153 /* IndexSignature */:
-            case 154 /* TypePredicate */:
-            case 155 /* TypeReference */:
-            case 156 /* FunctionType */:
-            case 157 /* ConstructorType */:
-            case 158 /* TypeQuery */:
-            case 159 /* TypeLiteral */:
-            case 160 /* ArrayType */:
-            case 161 /* TupleType */:
-            case 162 /* UnionType */:
-            case 163 /* IntersectionType */:
-            case 164 /* ParenthesizedType */:
-            case 222 /* InterfaceDeclaration */:
-            case 223 /* TypeAliasDeclaration */:
-            case 165 /* ThisType */:
-            case 166 /* LiteralType */:
-                // Types and signatures are TypeScript syntax, and exclude all other facts.
-                transformFlags = 3 /* AssertTypeScript */;
-                excludeFlags = -3 /* TypeExcludes */;
-                break;
-            case 140 /* ComputedPropertyName */:
-                // Even though computed property names are ES6, we don't treat them as such.
-                // This is so that they can flow through PropertyName transforms unaffected.
-                // Instead, we mark the container as ES6, so that it can properly handle the transform.
-                transformFlags |= 524288 /* ContainsComputedPropertyName */;
-                if (subtreeFlags & 8192 /* ContainsLexicalThis */) {
-                    // A computed method name like `[this.getName()](x: string) { ... }` needs to
-                    // distinguish itself from the normal case of a method body containing `this`:
-                    // `this` inside a method doesn't need to be rewritten (the method provides `this`),
-                    // whereas `this` inside a computed name *might* need to be rewritten if the class/object
-                    // is inside an arrow function:
-                    // `_this = this; () => class K { [_this.getName()]() { ... } }`
-                    // To make this distinction, use ContainsLexicalThisInComputedPropertyName
-                    // instead of ContainsLexicalThis for computed property names
-                    transformFlags |= 32768 /* ContainsLexicalThisInComputedPropertyName */;
+        function getModifiersTypeFromMappedType(type) {
+            if (!type.modifiersType) {
+                var constraintDeclaration = type.declaration.typeParameter.constraint;
+                if (constraintDeclaration.kind === 170 /* TypeOperator */) {
+                    // If the constraint declaration is a 'keyof T' node, the modifiers type is T. We check
+                    // AST nodes here because, when T is a non-generic type, the logic below eagerly resolves
+                    // 'keyof T' to a literal union type and we can't recover T from that type.
+                    type.modifiersType = instantiateType(getTypeFromTypeNode(constraintDeclaration.type), type.mapper || identityMapper);
                 }
-                break;
-            case 191 /* SpreadElementExpression */:
-                // This node is ES6 syntax, but is handled by a containing node.
-                transformFlags |= 262144 /* ContainsSpreadElementExpression */;
-                break;
-            case 95 /* SuperKeyword */:
-                // This node is ES6 syntax.
-                transformFlags |= 192 /* AssertES6 */;
-                break;
-            case 97 /* ThisKeyword */:
-                // Mark this node and its ancestors as containing a lexical `this` keyword.
-                transformFlags |= 8192 /* ContainsLexicalThis */;
-                break;
-            case 167 /* ObjectBindingPattern */:
-            case 168 /* ArrayBindingPattern */:
-                // These nodes are ES6 syntax.
-                transformFlags |= 192 /* AssertES6 */ | 2097152 /* ContainsBindingPattern */;
-                break;
-            case 143 /* Decorator */:
-                // This node is TypeScript syntax, and marks its container as also being TypeScript syntax.
-                transformFlags |= 3 /* AssertTypeScript */ | 2048 /* ContainsDecorators */;
-                break;
-            case 171 /* ObjectLiteralExpression */:
-                excludeFlags = 537430869 /* ObjectLiteralExcludes */;
-                if (subtreeFlags & 524288 /* ContainsComputedPropertyName */) {
-                    // If an ObjectLiteralExpression contains a ComputedPropertyName, then it
-                    // is an ES6 node.
-                    transformFlags |= 192 /* AssertES6 */;
+                else {
+                    // Otherwise, get the declared constraint type, and if the constraint type is a type parameter,
+                    // get the constraint of that type parameter. If the resulting type is an indexed type 'keyof T',
+                    // the modifiers type is T. Otherwise, the modifiers type is {}.
+                    var declaredType = getTypeFromMappedTypeNode(type.declaration);
+                    var constraint = getConstraintTypeFromMappedType(declaredType);
+                    var extendedConstraint = constraint && constraint.flags & 16384 /* TypeParameter */ ? getConstraintOfTypeParameter(constraint) : constraint;
+                    type.modifiersType = extendedConstraint && extendedConstraint.flags & 262144 /* Index */ ? instantiateType(extendedConstraint.type, type.mapper || identityMapper) : emptyObjectType;
                 }
-                if (subtreeFlags & 32768 /* ContainsLexicalThisInComputedPropertyName */) {
-                    // A computed property name containing `this` might need to be rewritten,
-                    // so propagate the ContainsLexicalThis flag upward.
-                    transformFlags |= 8192 /* ContainsLexicalThis */;
+            }
+            return type.modifiersType;
+        }
+        function isGenericMappedType(type) {
+            if (getObjectFlags(type) & 32 /* Mapped */) {
+                var constraintType = getConstraintTypeFromMappedType(type);
+                return maybeTypeOfKind(constraintType, 540672 /* TypeVariable */ | 262144 /* Index */);
+            }
+            return false;
+        }
+        function resolveStructuredTypeMembers(type) {
+            if (!type.members) {
+                if (type.flags & 32768 /* Object */) {
+                    if (type.objectFlags & 4 /* Reference */) {
+                        resolveTypeReferenceMembers(type);
+                    }
+                    else if (type.objectFlags & 3 /* ClassOrInterface */) {
+                        resolveClassOrInterfaceMembers(type);
+                    }
+                    else if (type.objectFlags & 16 /* Anonymous */) {
+                        resolveAnonymousTypeMembers(type);
+                    }
+                    else if (type.objectFlags & 32 /* Mapped */) {
+                        resolveMappedTypeMembers(type);
+                    }
                 }
-                break;
-            case 170 /* ArrayLiteralExpression */:
-            case 175 /* NewExpression */:
-                excludeFlags = 537133909 /* ArrayLiteralOrCallOrNewExcludes */;
-                if (subtreeFlags & 262144 /* ContainsSpreadElementExpression */) {
-                    // If the this node contains a SpreadElementExpression, then it is an ES6
-                    // node.
-                    transformFlags |= 192 /* AssertES6 */;
+                else if (type.flags & 65536 /* Union */) {
+                    resolveUnionTypeMembers(type);
                 }
-                break;
-            case 204 /* DoStatement */:
-            case 205 /* WhileStatement */:
-            case 206 /* ForStatement */:
-            case 207 /* ForInStatement */:
-                // A loop containing a block scoped binding *may* need to be transformed from ES6.
-                if (subtreeFlags & 1048576 /* ContainsBlockScopedBinding */) {
-                    transformFlags |= 192 /* AssertES6 */;
+                else if (type.flags & 131072 /* Intersection */) {
+                    resolveIntersectionTypeMembers(type);
                 }
-                break;
-            case 256 /* SourceFile */:
-                if (subtreeFlags & 16384 /* ContainsCapturedLexicalThis */) {
-                    transformFlags |= 192 /* AssertES6 */;
+            }
+            return type;
+        }
+        /** Return properties of an object type or an empty array for other types */
+        function getPropertiesOfObjectType(type) {
+            if (type.flags & 32768 /* Object */) {
+                return resolveStructuredTypeMembers(type).properties;
+            }
+            return emptyArray;
+        }
+        /** If the given type is an object type and that type has a property by the given name,
+         * return the symbol for that property. Otherwise return undefined.
+         */
+        function getPropertyOfObjectType(type, name) {
+            if (type.flags & 32768 /* Object */) {
+                var resolved = resolveStructuredTypeMembers(type);
+                var symbol = resolved.members.get(name);
+                if (symbol && symbolIsValue(symbol)) {
+                    return symbol;
                 }
-                break;
-            case 211 /* ReturnStatement */:
-            case 209 /* ContinueStatement */:
-            case 210 /* BreakStatement */:
-                transformFlags |= 8388608 /* ContainsHoistedDeclarationOrCompletion */;
-                break;
+            }
         }
-        node.transformFlags = transformFlags | 536870912 /* HasComputedFlags */;
-        return transformFlags & ~excludeFlags;
-    }
-})(ts || (ts = {}));
-/// <reference path="core.ts" />
-/// <reference path="diagnosticInformationMap.generated.ts" />
-var ts;
-(function (ts) {
-    function trace(host, message) {
-        host.trace(ts.formatMessage.apply(undefined, arguments));
-    }
-    ts.trace = trace;
-    /* @internal */
-    function isTraceEnabled(compilerOptions, host) {
-        return compilerOptions.traceResolution && host.trace !== undefined;
-    }
-    ts.isTraceEnabled = isTraceEnabled;
-    /* @internal */
-    function createResolvedModule(resolvedFileName, isExternalLibraryImport, failedLookupLocations) {
-        return { resolvedModule: resolvedFileName ? { resolvedFileName: resolvedFileName, isExternalLibraryImport: isExternalLibraryImport } : undefined, failedLookupLocations: failedLookupLocations };
-    }
-    ts.createResolvedModule = createResolvedModule;
-    function moduleHasNonRelativeName(moduleName) {
-        return !(ts.isRootedDiskPath(moduleName) || ts.isExternalModuleNameRelative(moduleName));
-    }
-    function tryReadTypesSection(packageJsonPath, baseDirectory, state) {
-        var jsonContent = readJson(packageJsonPath, state.host);
-        function tryReadFromField(fieldName) {
-            if (ts.hasProperty(jsonContent, fieldName)) {
-                var typesFile = jsonContent[fieldName];
-                if (typeof typesFile === "string") {
-                    var typesFilePath_1 = ts.normalizePath(ts.combinePaths(baseDirectory, typesFile));
-                    if (state.traceEnabled) {
-                        trace(state.host, ts.Diagnostics.package_json_has_0_field_1_that_references_2, fieldName, typesFile, typesFilePath_1);
+        function getPropertiesOfUnionOrIntersectionType(type) {
+            if (!type.resolvedProperties) {
+                var members = ts.createMap();
+                for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                    var current = _a[_i];
+                    for (var _b = 0, _c = getPropertiesOfType(current); _b < _c.length; _b++) {
+                        var prop = _c[_b];
+                        if (!members.has(prop.name)) {
+                            var combinedProp = getPropertyOfUnionOrIntersectionType(type, prop.name);
+                            if (combinedProp) {
+                                members.set(prop.name, combinedProp);
+                            }
+                        }
                     }
-                    return typesFilePath_1;
-                }
-                else {
-                    if (state.traceEnabled) {
-                        trace(state.host, ts.Diagnostics.Expected_type_of_0_field_in_package_json_to_be_string_got_1, fieldName, typeof typesFile);
+                    // The properties of a union type are those that are present in all constituent types, so
+                    // we only need to check the properties of the first type
+                    if (type.flags & 65536 /* Union */) {
+                        break;
                     }
                 }
+                type.resolvedProperties = getNamedMembers(members);
             }
+            return type.resolvedProperties;
         }
-        var typesFilePath = tryReadFromField("typings") || tryReadFromField("types");
-        if (typesFilePath) {
-            return typesFilePath;
+        function getPropertiesOfType(type) {
+            type = getApparentType(type);
+            return type.flags & 196608 /* UnionOrIntersection */ ?
+                getPropertiesOfUnionOrIntersectionType(type) :
+                getPropertiesOfObjectType(type);
         }
-        // Use the main module for inferring types if no types package specified and the allowJs is set
-        if (state.compilerOptions.allowJs && jsonContent.main && typeof jsonContent.main === "string") {
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.No_types_specified_in_package_json_but_allowJs_is_set_so_returning_main_value_of_0, jsonContent.main);
+        function getAllPossiblePropertiesOfType(type) {
+            if (type.flags & 65536 /* Union */) {
+                var props = ts.createMap();
+                for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                    var memberType = _a[_i];
+                    if (memberType.flags & 8190 /* Primitive */) {
+                        continue;
+                    }
+                    for (var _b = 0, _c = getPropertiesOfType(memberType); _b < _c.length; _b++) {
+                        var name_19 = _c[_b].name;
+                        if (!props.has(name_19)) {
+                            props.set(name_19, createUnionOrIntersectionProperty(type, name_19));
+                        }
+                    }
+                }
+                return ts.arrayFrom(props.values());
+            }
+            else {
+                return getPropertiesOfType(type);
             }
-            var mainFilePath = ts.normalizePath(ts.combinePaths(baseDirectory, jsonContent.main));
-            return mainFilePath;
-        }
-        return undefined;
-    }
-    function readJson(path, host) {
-        try {
-            var jsonText = host.readFile(path);
-            return jsonText ? JSON.parse(jsonText) : {};
         }
-        catch (e) {
-            // gracefully handle if readFile fails or returns not JSON
-            return {};
+        function getConstraintOfType(type) {
+            return type.flags & 16384 /* TypeParameter */ ? getConstraintOfTypeParameter(type) :
+                type.flags & 524288 /* IndexedAccess */ ? getConstraintOfIndexedAccess(type) :
+                    getBaseConstraintOfType(type);
         }
-    }
-    var typeReferenceExtensions = [".d.ts"];
-    function getEffectiveTypeRoots(options, host) {
-        if (options.typeRoots) {
-            return options.typeRoots;
+        function getConstraintOfTypeParameter(typeParameter) {
+            return hasNonCircularBaseConstraint(typeParameter) ? getConstraintFromTypeParameter(typeParameter) : undefined;
         }
-        var currentDirectory;
-        if (options.configFilePath) {
-            currentDirectory = ts.getDirectoryPath(options.configFilePath);
+        function getConstraintOfIndexedAccess(type) {
+            var baseObjectType = getBaseConstraintOfType(type.objectType);
+            var baseIndexType = getBaseConstraintOfType(type.indexType);
+            return baseObjectType || baseIndexType ? getIndexedAccessType(baseObjectType || type.objectType, baseIndexType || type.indexType) : undefined;
         }
-        else if (host.getCurrentDirectory) {
-            currentDirectory = host.getCurrentDirectory();
+        function getBaseConstraintOfType(type) {
+            if (type.flags & (540672 /* TypeVariable */ | 196608 /* UnionOrIntersection */)) {
+                var constraint = getResolvedBaseConstraint(type);
+                if (constraint !== noConstraintType && constraint !== circularConstraintType) {
+                    return constraint;
+                }
+            }
+            else if (type.flags & 262144 /* Index */) {
+                return stringType;
+            }
+            return undefined;
         }
-        return currentDirectory && getDefaultTypeRoots(currentDirectory, host);
-    }
-    ts.getEffectiveTypeRoots = getEffectiveTypeRoots;
-    /**
-     * Returns the path to every node_modules/@types directory from some ancestor directory.
-     * Returns undefined if there are none.
-     */
-    function getDefaultTypeRoots(currentDirectory, host) {
-        if (!host.directoryExists) {
-            return [ts.combinePaths(currentDirectory, nodeModulesAtTypes)];
+        function hasNonCircularBaseConstraint(type) {
+            return getResolvedBaseConstraint(type) !== circularConstraintType;
         }
-        var typeRoots;
-        while (true) {
-            var atTypes = ts.combinePaths(currentDirectory, nodeModulesAtTypes);
-            if (host.directoryExists(atTypes)) {
-                (typeRoots || (typeRoots = [])).push(atTypes);
+        /**
+         * Return the resolved base constraint of a type variable. The noConstraintType singleton is returned if the
+         * type variable has no constraint, and the circularConstraintType singleton is returned if the constraint
+         * circularly references the type variable.
+         */
+        function getResolvedBaseConstraint(type) {
+            var typeStack;
+            var circular;
+            if (!type.resolvedBaseConstraint) {
+                typeStack = [];
+                var constraint = getBaseConstraint(type);
+                type.resolvedBaseConstraint = circular ? circularConstraintType : getTypeWithThisArgument(constraint || noConstraintType, type);
+            }
+            return type.resolvedBaseConstraint;
+            function getBaseConstraint(t) {
+                if (ts.contains(typeStack, t)) {
+                    circular = true;
+                    return undefined;
+                }
+                typeStack.push(t);
+                var result = computeBaseConstraint(t);
+                typeStack.pop();
+                return result;
             }
-            var parent_7 = ts.getDirectoryPath(currentDirectory);
-            if (parent_7 === currentDirectory) {
-                break;
+            function computeBaseConstraint(t) {
+                if (t.flags & 16384 /* TypeParameter */) {
+                    var constraint = getConstraintFromTypeParameter(t);
+                    return t.isThisType ? constraint :
+                        constraint ? getBaseConstraint(constraint) : undefined;
+                }
+                if (t.flags & 196608 /* UnionOrIntersection */) {
+                    var types = t.types;
+                    var baseTypes = [];
+                    for (var _i = 0, types_2 = types; _i < types_2.length; _i++) {
+                        var type_2 = types_2[_i];
+                        var baseType = getBaseConstraint(type_2);
+                        if (baseType) {
+                            baseTypes.push(baseType);
+                        }
+                    }
+                    return t.flags & 65536 /* Union */ && baseTypes.length === types.length ? getUnionType(baseTypes) :
+                        t.flags & 131072 /* Intersection */ && baseTypes.length ? getIntersectionType(baseTypes) :
+                            undefined;
+                }
+                if (t.flags & 262144 /* Index */) {
+                    return stringType;
+                }
+                if (t.flags & 524288 /* IndexedAccess */) {
+                    var baseObjectType = getBaseConstraint(t.objectType);
+                    var baseIndexType = getBaseConstraint(t.indexType);
+                    var baseIndexedAccess = baseObjectType && baseIndexType ? getIndexedAccessType(baseObjectType, baseIndexType) : undefined;
+                    return baseIndexedAccess && baseIndexedAccess !== unknownType ? getBaseConstraint(baseIndexedAccess) : undefined;
+                }
+                return t;
             }
-            currentDirectory = parent_7;
         }
-        return typeRoots;
-    }
-    var nodeModulesAtTypes = ts.combinePaths("node_modules", "@types");
-    /**
-     * @param {string | undefined} containingFile - file that contains type reference directive, can be undefined if containing file is unknown.
-     * This is possible in case if resolution is performed for directives specified via 'types' parameter. In this case initial path for secondary lookups
-     * is assumed to be the same as root directory of the project.
-     */
-    function resolveTypeReferenceDirective(typeReferenceDirectiveName, containingFile, options, host) {
-        var traceEnabled = isTraceEnabled(options, host);
-        var moduleResolutionState = {
-            compilerOptions: options,
-            host: host,
-            skipTsx: true,
-            traceEnabled: traceEnabled
-        };
-        var typeRoots = getEffectiveTypeRoots(options, host);
-        if (traceEnabled) {
-            if (containingFile === undefined) {
-                if (typeRoots === undefined) {
-                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set, typeReferenceDirectiveName);
+        function getApparentTypeOfIntersectionType(type) {
+            return type.resolvedApparentType || (type.resolvedApparentType = getTypeWithThisArgument(type, type));
+        }
+        /**
+         * Gets the default type for a type parameter.
+         *
+         * If the type parameter is the result of an instantiation, this gets the instantiated
+         * default type of its target. If the type parameter has no default type, `undefined`
+         * is returned.
+         *
+         * This function *does not* perform a circularity check.
+         */
+        function getDefaultFromTypeParameter(typeParameter) {
+            if (!typeParameter.default) {
+                if (typeParameter.target) {
+                    var targetDefault = getDefaultFromTypeParameter(typeParameter.target);
+                    typeParameter.default = targetDefault ? instantiateType(targetDefault, typeParameter.mapper) : noConstraintType;
                 }
                 else {
-                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1, typeReferenceDirectiveName, typeRoots);
+                    var defaultDeclaration = typeParameter.symbol && ts.forEach(typeParameter.symbol.declarations, function (decl) { return ts.isTypeParameterDeclaration(decl) && decl.default; });
+                    typeParameter.default = defaultDeclaration ? getTypeFromTypeNode(defaultDeclaration) : noConstraintType;
                 }
             }
-            else {
-                if (typeRoots === undefined) {
-                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set, typeReferenceDirectiveName, containingFile);
+            return typeParameter.default === noConstraintType ? undefined : typeParameter.default;
+        }
+        /**
+         * For a type parameter, return the base constraint of the type parameter. For the string, number,
+         * boolean, and symbol primitive types, return the corresponding object types. Otherwise return the
+         * type itself. Note that the apparent type of a union type is the union type itself.
+         */
+        function getApparentType(type) {
+            var t = type.flags & 540672 /* TypeVariable */ ? getBaseConstraintOfType(type) || emptyObjectType : type;
+            return t.flags & 131072 /* Intersection */ ? getApparentTypeOfIntersectionType(t) :
+                t.flags & 262178 /* StringLike */ ? globalStringType :
+                    t.flags & 84 /* NumberLike */ ? globalNumberType :
+                        t.flags & 136 /* BooleanLike */ ? globalBooleanType :
+                            t.flags & 512 /* ESSymbol */ ? getGlobalESSymbolType(/*reportErrors*/ languageVersion >= 2 /* ES2015 */) :
+                                t.flags & 16777216 /* NonPrimitive */ ? emptyObjectType :
+                                    t;
+        }
+        function createUnionOrIntersectionProperty(containingType, name) {
+            var props;
+            var types = containingType.types;
+            var isUnion = containingType.flags & 65536 /* Union */;
+            var excludeModifiers = isUnion ? 24 /* NonPublicAccessibilityModifier */ : 0;
+            // Flags we want to propagate to the result if they exist in all source symbols
+            var commonFlags = isUnion ? 0 /* None */ : 67108864 /* Optional */;
+            var syntheticFlag = 4 /* SyntheticMethod */;
+            var checkFlags = 0;
+            for (var _i = 0, types_3 = types; _i < types_3.length; _i++) {
+                var current = types_3[_i];
+                var type = getApparentType(current);
+                if (type !== unknownType) {
+                    var prop = getPropertyOfType(type, name);
+                    var modifiers = prop ? ts.getDeclarationModifierFlagsFromSymbol(prop) : 0;
+                    if (prop && !(modifiers & excludeModifiers)) {
+                        commonFlags &= prop.flags;
+                        if (!props) {
+                            props = [prop];
+                        }
+                        else if (!ts.contains(props, prop)) {
+                            props.push(prop);
+                        }
+                        checkFlags |= (isReadonlySymbol(prop) ? 8 /* Readonly */ : 0) |
+                            (!(modifiers & 24 /* NonPublicAccessibilityModifier */) ? 64 /* ContainsPublic */ : 0) |
+                            (modifiers & 16 /* Protected */ ? 128 /* ContainsProtected */ : 0) |
+                            (modifiers & 8 /* Private */ ? 256 /* ContainsPrivate */ : 0) |
+                            (modifiers & 32 /* Static */ ? 512 /* ContainsStatic */ : 0);
+                        if (!isMethodLike(prop)) {
+                            syntheticFlag = 2 /* SyntheticProperty */;
+                        }
+                    }
+                    else if (isUnion) {
+                        checkFlags |= 16 /* Partial */;
+                    }
                 }
-                else {
-                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_1_root_directory_2, typeReferenceDirectiveName, containingFile, typeRoots);
+            }
+            if (!props) {
+                return undefined;
+            }
+            if (props.length === 1 && !(checkFlags & 16 /* Partial */)) {
+                return props[0];
+            }
+            var propTypes = [];
+            var declarations = [];
+            var commonType = undefined;
+            for (var _a = 0, props_1 = props; _a < props_1.length; _a++) {
+                var prop = props_1[_a];
+                if (prop.declarations) {
+                    ts.addRange(declarations, prop.declarations);
+                }
+                var type = getTypeOfSymbol(prop);
+                if (!commonType) {
+                    commonType = type;
+                }
+                else if (type !== commonType) {
+                    checkFlags |= 32 /* HasNonUniformType */;
                 }
+                propTypes.push(type);
             }
+            var result = createSymbol(4 /* Property */ | commonFlags, name);
+            result.checkFlags = syntheticFlag | checkFlags;
+            result.containingType = containingType;
+            result.declarations = declarations;
+            result.type = isUnion ? getUnionType(propTypes) : getIntersectionType(propTypes);
+            return result;
         }
-        var failedLookupLocations = [];
-        // Check primary library paths
-        if (typeRoots && typeRoots.length) {
-            if (traceEnabled) {
-                trace(host, ts.Diagnostics.Resolving_with_primary_search_path_0, typeRoots.join(", "));
-            }
-            var primarySearchPaths = typeRoots;
-            for (var _i = 0, primarySearchPaths_1 = primarySearchPaths; _i < primarySearchPaths_1.length; _i++) {
-                var typeRoot = primarySearchPaths_1[_i];
-                var candidate = ts.combinePaths(typeRoot, typeReferenceDirectiveName);
-                var candidateDirectory = ts.getDirectoryPath(candidate);
-                var resolvedFile_1 = loadNodeModuleFromDirectory(typeReferenceExtensions, candidate, failedLookupLocations, !directoryProbablyExists(candidateDirectory, host), moduleResolutionState);
-                if (resolvedFile_1) {
-                    if (traceEnabled) {
-                        trace(host, ts.Diagnostics.Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2, typeReferenceDirectiveName, resolvedFile_1, true);
+        // Return the symbol for a given property in a union or intersection type, or undefined if the property
+        // does not exist in any constituent type. Note that the returned property may only be present in some
+        // constituents, in which case the isPartial flag is set when the containing type is union type. We need
+        // these partial properties when identifying discriminant properties, but otherwise they are filtered out
+        // and do not appear to be present in the union type.
+        function getUnionOrIntersectionProperty(type, name) {
+            var properties = type.propertyCache || (type.propertyCache = ts.createMap());
+            var property = properties.get(name);
+            if (!property) {
+                property = createUnionOrIntersectionProperty(type, name);
+                if (property) {
+                    properties.set(name, property);
+                }
+            }
+            return property;
+        }
+        function getPropertyOfUnionOrIntersectionType(type, name) {
+            var property = getUnionOrIntersectionProperty(type, name);
+            // We need to filter out partial properties in union types
+            return property && !(ts.getCheckFlags(property) & 16 /* Partial */) ? property : undefined;
+        }
+        /**
+         * Return the symbol for the property with the given name in the given type. Creates synthetic union properties when
+         * necessary, maps primitive types and type parameters are to their apparent types, and augments with properties from
+         * Object and Function as appropriate.
+         *
+         * @param type a type to look up property from
+         * @param name a name of property to look up in a given type
+         */
+        function getPropertyOfType(type, name) {
+            type = getApparentType(type);
+            if (type.flags & 32768 /* Object */) {
+                var resolved = resolveStructuredTypeMembers(type);
+                var symbol = resolved.members.get(name);
+                if (symbol && symbolIsValue(symbol)) {
+                    return symbol;
+                }
+                if (resolved === anyFunctionType || resolved.callSignatures.length || resolved.constructSignatures.length) {
+                    var symbol_1 = getPropertyOfObjectType(globalFunctionType, name);
+                    if (symbol_1) {
+                        return symbol_1;
                     }
-                    return {
-                        resolvedTypeReferenceDirective: { primary: true, resolvedFileName: resolvedFile_1 },
-                        failedLookupLocations: failedLookupLocations
-                    };
                 }
+                return getPropertyOfObjectType(globalObjectType, name);
+            }
+            if (type.flags & 196608 /* UnionOrIntersection */) {
+                return getPropertyOfUnionOrIntersectionType(type, name);
             }
+            return undefined;
         }
-        else {
-            if (traceEnabled) {
-                trace(host, ts.Diagnostics.Root_directory_cannot_be_determined_skipping_primary_search_paths);
+        function getSignaturesOfStructuredType(type, kind) {
+            if (type.flags & 229376 /* StructuredType */) {
+                var resolved = resolveStructuredTypeMembers(type);
+                return kind === 0 /* Call */ ? resolved.callSignatures : resolved.constructSignatures;
             }
+            return emptyArray;
         }
-        var resolvedFile;
-        var initialLocationForSecondaryLookup;
-        if (containingFile) {
-            initialLocationForSecondaryLookup = ts.getDirectoryPath(containingFile);
+        /**
+         * Return the signatures of the given kind in the given type. Creates synthetic union signatures when necessary and
+         * maps primitive types and type parameters are to their apparent types.
+         */
+        function getSignaturesOfType(type, kind) {
+            return getSignaturesOfStructuredType(getApparentType(type), kind);
         }
-        if (initialLocationForSecondaryLookup !== undefined) {
-            // check secondary locations
-            if (traceEnabled) {
-                trace(host, ts.Diagnostics.Looking_up_in_node_modules_folder_initial_location_0, initialLocationForSecondaryLookup);
+        function getIndexInfoOfStructuredType(type, kind) {
+            if (type.flags & 229376 /* StructuredType */) {
+                var resolved = resolveStructuredTypeMembers(type);
+                return kind === 0 /* String */ ? resolved.stringIndexInfo : resolved.numberIndexInfo;
             }
-            resolvedFile = loadModuleFromNodeModules(typeReferenceDirectiveName, initialLocationForSecondaryLookup, failedLookupLocations, moduleResolutionState, /*checkOneLevel*/ false);
-            if (traceEnabled) {
-                if (resolvedFile) {
-                    trace(host, ts.Diagnostics.Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2, typeReferenceDirectiveName, resolvedFile, false);
+        }
+        function getIndexTypeOfStructuredType(type, kind) {
+            var info = getIndexInfoOfStructuredType(type, kind);
+            return info && info.type;
+        }
+        // Return the indexing info of the given kind in the given type. Creates synthetic union index types when necessary and
+        // maps primitive types and type parameters are to their apparent types.
+        function getIndexInfoOfType(type, kind) {
+            return getIndexInfoOfStructuredType(getApparentType(type), kind);
+        }
+        // Return the index type of the given kind in the given type. Creates synthetic union index types when necessary and
+        // maps primitive types and type parameters are to their apparent types.
+        function getIndexTypeOfType(type, kind) {
+            return getIndexTypeOfStructuredType(getApparentType(type), kind);
+        }
+        function getImplicitIndexTypeOfType(type, kind) {
+            if (isObjectLiteralType(type)) {
+                var propTypes = [];
+                for (var _i = 0, _a = getPropertiesOfType(type); _i < _a.length; _i++) {
+                    var prop = _a[_i];
+                    if (kind === 0 /* String */ || isNumericLiteralName(prop.name)) {
+                        propTypes.push(getTypeOfSymbol(prop));
+                    }
                 }
-                else {
-                    trace(host, ts.Diagnostics.Type_reference_directive_0_was_not_resolved, typeReferenceDirectiveName);
+                if (propTypes.length) {
+                    return getUnionType(propTypes, /*subtypeReduction*/ true);
                 }
             }
+            return undefined;
         }
-        else {
-            if (traceEnabled) {
-                trace(host, ts.Diagnostics.Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_modules_folder);
-            }
+        // Return list of type parameters with duplicates removed (duplicate identifier errors are generated in the actual
+        // type checking functions).
+        function getTypeParametersFromDeclaration(declaration) {
+            var result;
+            ts.forEach(ts.getEffectiveTypeParameterDeclarations(declaration), function (node) {
+                var tp = getDeclaredTypeOfTypeParameter(node.symbol);
+                if (!ts.contains(result, tp)) {
+                    if (!result) {
+                        result = [];
+                    }
+                    result.push(tp);
+                }
+            });
+            return result;
         }
-        return {
-            resolvedTypeReferenceDirective: resolvedFile
-                ? { primary: false, resolvedFileName: resolvedFile }
-                : undefined,
-            failedLookupLocations: failedLookupLocations
-        };
-    }
-    ts.resolveTypeReferenceDirective = resolveTypeReferenceDirective;
-    /**
-      * Given a set of options, returns the set of type directive names
-      *   that should be included for this program automatically.
-      * This list could either come from the config file,
-      *   or from enumerating the types root + initial secondary types lookup location.
-      * More type directives might appear in the program later as a result of loading actual source files;
-      *   this list is only the set of defaults that are implicitly included.
-      */
-    function getAutomaticTypeDirectiveNames(options, host) {
-        // Use explicit type list from tsconfig.json
-        if (options.types) {
-            return options.types;
+        function symbolsToArray(symbols) {
+            var result = [];
+            symbols.forEach(function (symbol, id) {
+                if (!isReservedMemberName(id)) {
+                    result.push(symbol);
+                }
+            });
+            return result;
         }
-        // Walk the primary type lookup locations
-        var result = [];
-        if (host.directoryExists && host.getDirectories) {
-            var typeRoots = getEffectiveTypeRoots(options, host);
-            if (typeRoots) {
-                for (var _i = 0, typeRoots_1 = typeRoots; _i < typeRoots_1.length; _i++) {
-                    var root = typeRoots_1[_i];
-                    if (host.directoryExists(root)) {
-                        for (var _a = 0, _b = host.getDirectories(root); _a < _b.length; _a++) {
-                            var typeDirectivePath = _b[_a];
-                            var normalized = ts.normalizePath(typeDirectivePath);
-                            var packageJsonPath = pathToPackageJson(ts.combinePaths(root, normalized));
-                            // tslint:disable-next-line:no-null-keyword
-                            var isNotNeededPackage = host.fileExists(packageJsonPath) && readJson(packageJsonPath, host).typings === null;
-                            if (!isNotNeededPackage) {
-                                // Return just the type directive names
-                                result.push(ts.getBaseFileName(normalized));
-                            }
+        function isJSDocOptionalParameter(node) {
+            if (node.flags & 65536 /* JavaScriptFile */) {
+                if (node.type && node.type.kind === 278 /* JSDocOptionalType */) {
+                    return true;
+                }
+                var paramTags = ts.getJSDocParameterTags(node);
+                if (paramTags) {
+                    for (var _i = 0, paramTags_1 = paramTags; _i < paramTags_1.length; _i++) {
+                        var paramTag = paramTags_1[_i];
+                        if (paramTag.isBracketed) {
+                            return true;
+                        }
+                        if (paramTag.typeExpression) {
+                            return paramTag.typeExpression.type.kind === 278 /* JSDocOptionalType */;
                         }
                     }
                 }
             }
         }
-        return result;
-    }
-    ts.getAutomaticTypeDirectiveNames = getAutomaticTypeDirectiveNames;
-    function resolveModuleName(moduleName, containingFile, compilerOptions, host) {
-        var traceEnabled = isTraceEnabled(compilerOptions, host);
-        if (traceEnabled) {
-            trace(host, ts.Diagnostics.Resolving_module_0_from_1, moduleName, containingFile);
-        }
-        var moduleResolution = compilerOptions.moduleResolution;
-        if (moduleResolution === undefined) {
-            moduleResolution = ts.getEmitModuleKind(compilerOptions) === ts.ModuleKind.CommonJS ? ts.ModuleResolutionKind.NodeJs : ts.ModuleResolutionKind.Classic;
-            if (traceEnabled) {
-                trace(host, ts.Diagnostics.Module_resolution_kind_is_not_specified_using_0, ts.ModuleResolutionKind[moduleResolution]);
+        function tryFindAmbientModule(moduleName, withAugmentations) {
+            if (ts.isExternalModuleNameRelative(moduleName)) {
+                return undefined;
             }
+            var symbol = getSymbol(globals, "\"" + moduleName + "\"", 512 /* ValueModule */);
+            // merged symbol is module declaration symbol combined with all augmentations
+            return symbol && withAugmentations ? getMergedSymbol(symbol) : symbol;
         }
-        else {
-            if (traceEnabled) {
-                trace(host, ts.Diagnostics.Explicitly_specified_module_resolution_kind_Colon_0, ts.ModuleResolutionKind[moduleResolution]);
+        function isOptionalParameter(node) {
+            if (ts.hasQuestionToken(node) || isJSDocOptionalParameter(node)) {
+                return true;
             }
+            if (node.initializer) {
+                var signatureDeclaration = node.parent;
+                var signature = getSignatureFromDeclaration(signatureDeclaration);
+                var parameterIndex = ts.indexOf(signatureDeclaration.parameters, node);
+                ts.Debug.assert(parameterIndex >= 0);
+                return parameterIndex >= signature.minArgumentCount;
+            }
+            var iife = ts.getImmediatelyInvokedFunctionExpression(node.parent);
+            if (iife) {
+                return !node.type &&
+                    !node.dotDotDotToken &&
+                    ts.indexOf(node.parent.parameters, node) >= iife.arguments.length;
+            }
+            return false;
         }
-        var result;
-        switch (moduleResolution) {
-            case ts.ModuleResolutionKind.NodeJs:
-                result = nodeModuleNameResolver(moduleName, containingFile, compilerOptions, host);
-                break;
-            case ts.ModuleResolutionKind.Classic:
-                result = classicNameResolver(moduleName, containingFile, compilerOptions, host);
-                break;
-        }
-        if (traceEnabled) {
-            if (result.resolvedModule) {
-                trace(host, ts.Diagnostics.Module_name_0_was_successfully_resolved_to_1, moduleName, result.resolvedModule.resolvedFileName);
+        function createTypePredicateFromTypePredicateNode(node) {
+            if (node.parameterName.kind === 71 /* Identifier */) {
+                var parameterName = node.parameterName;
+                return {
+                    kind: 1 /* Identifier */,
+                    parameterName: parameterName ? parameterName.text : undefined,
+                    parameterIndex: parameterName ? getTypePredicateParameterIndex(node.parent.parameters, parameterName) : undefined,
+                    type: getTypeFromTypeNode(node.type)
+                };
             }
             else {
-                trace(host, ts.Diagnostics.Module_name_0_was_not_resolved, moduleName);
+                return {
+                    kind: 0 /* This */,
+                    type: getTypeFromTypeNode(node.type)
+                };
             }
         }
-        return result;
-    }
-    ts.resolveModuleName = resolveModuleName;
-    /**
-     * Any module resolution kind can be augmented with optional settings: 'baseUrl', 'paths' and 'rootDirs' - they are used to
-     * mitigate differences between design time structure of the project and its runtime counterpart so the same import name
-     * can be resolved successfully by TypeScript compiler and runtime module loader.
-     * If these settings are set then loading procedure will try to use them to resolve module name and it can of failure it will
-     * fallback to standard resolution routine.
-     *
-     * - baseUrl - this setting controls how non-relative module names are resolved. If this setting is specified then non-relative
-     * names will be resolved relative to baseUrl: i.e. if baseUrl is '/a/b' then candidate location to resolve module name 'c/d' will
-     * be '/a/b/c/d'
-     * - paths - this setting can only be used when baseUrl is specified. allows to tune how non-relative module names
-     * will be resolved based on the content of the module name.
-     * Structure of 'paths' compiler options
-     * 'paths': {
-     *    pattern-1: [...substitutions],
-     *    pattern-2: [...substitutions],
-     *    ...
-     *    pattern-n: [...substitutions]
-     * }
-     * Pattern here is a string that can contain zero or one '*' character. During module resolution module name will be matched against
-     * all patterns in the list. Matching for patterns that don't contain '*' means that module name must be equal to pattern respecting the case.
-     * If pattern contains '*' then to match pattern "<prefix>*<suffix>" module name must start with the <prefix> and end with <suffix>.
-     * <MatchedStar> denotes part of the module name between <prefix> and <suffix>.
-     * If module name can be matches with multiple patterns then pattern with the longest prefix will be picked.
-     * After selecting pattern we'll use list of substitutions to get candidate locations of the module and the try to load module
-     * from the candidate location.
-     * Substitution is a string that can contain zero or one '*'. To get candidate location from substitution we'll pick every
-     * substitution in the list and replace '*' with <MatchedStar> string. If candidate location is not rooted it
-     * will be converted to absolute using baseUrl.
-     * For example:
-     * baseUrl: /a/b/c
-     * "paths": {
-     *     // match all module names
-     *     "*": [
-     *         "*",        // use matched name as is,
-     *                     // <matched name> will be looked as /a/b/c/<matched name>
-     *
-     *         "folder1/*" // substitution will convert matched name to 'folder1/<matched name>',
-     *                     // since it is not rooted then final candidate location will be /a/b/c/folder1/<matched name>
-     *     ],
-     *     // match module names that start with 'components/'
-     *     "components/*": [ "/root/components/*" ] // substitution will convert /components/folder1/<matched name> to '/root/components/folder1/<matched name>',
-     *                                              // it is rooted so it will be final candidate location
-     * }
-     *
-     * 'rootDirs' allows the project to be spreaded across multiple locations and resolve modules with relative names as if
-     * they were in the same location. For example lets say there are two files
-     * '/local/src/content/file1.ts'
-     * '/shared/components/contracts/src/content/protocols/file2.ts'
-     * After bundling content of '/shared/components/contracts/src' will be merged with '/local/src' so
-     * if file1 has the following import 'import {x} from "./protocols/file2"' it will be resolved successfully in runtime.
-     * 'rootDirs' provides the way to tell compiler that in order to get the whole project it should behave as if content of all
-     * root dirs were merged together.
-     * I.e. for the example above 'rootDirs' will have two entries: [ '/local/src', '/shared/components/contracts/src' ].
-     * Compiler will first convert './protocols/file2' into absolute path relative to the location of containing file:
-     * '/local/src/content/protocols/file2' and try to load it - failure.
-     * Then it will search 'rootDirs' looking for a longest matching prefix of this absolute path and if such prefix is found - absolute path will
-     * be converted to a path relative to found rootDir entry './content/protocols/file2' (*). As a last step compiler will check all remaining
-     * entries in 'rootDirs', use them to build absolute path out of (*) and try to resolve module from this location.
-     */
-    function tryLoadModuleUsingOptionalResolutionSettings(moduleName, containingDirectory, loader, failedLookupLocations, supportedExtensions, state) {
-        if (moduleHasNonRelativeName(moduleName)) {
-            return tryLoadModuleUsingBaseUrl(moduleName, loader, failedLookupLocations, supportedExtensions, state);
-        }
-        else {
-            return tryLoadModuleUsingRootDirs(moduleName, containingDirectory, loader, failedLookupLocations, supportedExtensions, state);
-        }
-    }
-    function tryLoadModuleUsingRootDirs(moduleName, containingDirectory, loader, failedLookupLocations, supportedExtensions, state) {
-        if (!state.compilerOptions.rootDirs) {
-            return undefined;
-        }
-        if (state.traceEnabled) {
-            trace(state.host, ts.Diagnostics.rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0, moduleName);
-        }
-        var candidate = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
-        var matchedRootDir;
-        var matchedNormalizedPrefix;
-        for (var _i = 0, _a = state.compilerOptions.rootDirs; _i < _a.length; _i++) {
-            var rootDir = _a[_i];
-            // rootDirs are expected to be absolute
-            // in case of tsconfig.json this will happen automatically - compiler will expand relative names
-            // using location of tsconfig.json as base location
-            var normalizedRoot = ts.normalizePath(rootDir);
-            if (!ts.endsWith(normalizedRoot, ts.directorySeparator)) {
-                normalizedRoot += ts.directorySeparator;
+        /**
+         * Gets the minimum number of type arguments needed to satisfy all non-optional type
+         * parameters.
+         */
+        function getMinTypeArgumentCount(typeParameters) {
+            var minTypeArgumentCount = 0;
+            if (typeParameters) {
+                for (var i = 0; i < typeParameters.length; i++) {
+                    if (!getDefaultFromTypeParameter(typeParameters[i])) {
+                        minTypeArgumentCount = i + 1;
+                    }
+                }
             }
-            var isLongestMatchingPrefix = ts.startsWith(candidate, normalizedRoot) &&
-                (matchedNormalizedPrefix === undefined || matchedNormalizedPrefix.length < normalizedRoot.length);
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Checking_if_0_is_the_longest_matching_prefix_for_1_2, normalizedRoot, candidate, isLongestMatchingPrefix);
+            return minTypeArgumentCount;
+        }
+        /**
+         * Fill in default types for unsupplied type arguments. If `typeArguments` is undefined
+         * when a default type is supplied, a new array will be created and returned.
+         *
+         * @param typeArguments The supplied type arguments.
+         * @param typeParameters The requested type parameters.
+         * @param minTypeArgumentCount The minimum number of required type arguments.
+         */
+        function fillMissingTypeArguments(typeArguments, typeParameters, minTypeArgumentCount, location) {
+            var numTypeParameters = ts.length(typeParameters);
+            if (numTypeParameters) {
+                var numTypeArguments = ts.length(typeArguments);
+                var isJavaScript = ts.isInJavaScriptFile(location);
+                if ((isJavaScript || numTypeArguments >= minTypeArgumentCount) && numTypeArguments <= numTypeParameters) {
+                    if (!typeArguments) {
+                        typeArguments = [];
+                    }
+                    // Map an unsatisfied type parameter with a default type.
+                    // If a type parameter does not have a default type, or if the default type
+                    // is a forward reference, the empty object type is used.
+                    for (var i = numTypeArguments; i < numTypeParameters; i++) {
+                        typeArguments[i] = isJavaScript ? anyType : emptyObjectType;
+                    }
+                    for (var i = numTypeArguments; i < numTypeParameters; i++) {
+                        var mapper = createTypeMapper(typeParameters, typeArguments);
+                        var defaultType = getDefaultFromTypeParameter(typeParameters[i]);
+                        typeArguments[i] = defaultType ? instantiateType(defaultType, mapper) : isJavaScript ? anyType : emptyObjectType;
+                    }
+                }
             }
-            if (isLongestMatchingPrefix) {
-                matchedNormalizedPrefix = normalizedRoot;
-                matchedRootDir = rootDir;
+            return typeArguments;
+        }
+        function getSignatureFromDeclaration(declaration) {
+            var links = getNodeLinks(declaration);
+            if (!links.resolvedSignature) {
+                var parameters = [];
+                var hasLiteralTypes = false;
+                var minArgumentCount = 0;
+                var thisParameter = undefined;
+                var hasThisParameter = void 0;
+                var iife = ts.getImmediatelyInvokedFunctionExpression(declaration);
+                var isJSConstructSignature = ts.isJSDocConstructSignature(declaration);
+                var isUntypedSignatureInJSFile = !iife && !isJSConstructSignature && ts.isInJavaScriptFile(declaration) && !ts.hasJSDocParameterTags(declaration);
+                // If this is a JSDoc construct signature, then skip the first parameter in the
+                // parameter list.  The first parameter represents the return type of the construct
+                // signature.
+                for (var i = isJSConstructSignature ? 1 : 0; i < declaration.parameters.length; i++) {
+                    var param = declaration.parameters[i];
+                    var paramSymbol = param.symbol;
+                    // Include parameter symbol instead of property symbol in the signature
+                    if (paramSymbol && !!(paramSymbol.flags & 4 /* Property */) && !ts.isBindingPattern(param.name)) {
+                        var resolvedSymbol = resolveName(param, paramSymbol.name, 107455 /* Value */, undefined, undefined);
+                        paramSymbol = resolvedSymbol;
+                    }
+                    if (i === 0 && paramSymbol.name === "this") {
+                        hasThisParameter = true;
+                        thisParameter = param.symbol;
+                    }
+                    else {
+                        parameters.push(paramSymbol);
+                    }
+                    if (param.type && param.type.kind === 173 /* LiteralType */) {
+                        hasLiteralTypes = true;
+                    }
+                    // Record a new minimum argument count if this is not an optional parameter
+                    var isOptionalParameter_1 = param.initializer || param.questionToken || param.dotDotDotToken ||
+                        iife && parameters.length > iife.arguments.length && !param.type ||
+                        isJSDocOptionalParameter(param) ||
+                        isUntypedSignatureInJSFile;
+                    if (!isOptionalParameter_1) {
+                        minArgumentCount = parameters.length;
+                    }
+                }
+                // If only one accessor includes a this-type annotation, the other behaves as if it had the same type annotation
+                if ((declaration.kind === 153 /* GetAccessor */ || declaration.kind === 154 /* SetAccessor */) &&
+                    !ts.hasDynamicName(declaration) &&
+                    (!hasThisParameter || !thisParameter)) {
+                    var otherKind = declaration.kind === 153 /* GetAccessor */ ? 154 /* SetAccessor */ : 153 /* GetAccessor */;
+                    var other = ts.getDeclarationOfKind(declaration.symbol, otherKind);
+                    if (other) {
+                        thisParameter = getAnnotatedAccessorThisParameter(other);
+                    }
+                }
+                var classType = declaration.kind === 152 /* Constructor */ ?
+                    getDeclaredTypeOfClassOrInterface(getMergedSymbol(declaration.parent.symbol))
+                    : undefined;
+                var typeParameters = classType ? classType.localTypeParameters : getTypeParametersFromDeclaration(declaration);
+                var returnType = getSignatureReturnTypeFromDeclaration(declaration, isJSConstructSignature, classType);
+                var typePredicate = declaration.type && declaration.type.kind === 158 /* TypePredicate */ ?
+                    createTypePredicateFromTypePredicateNode(declaration.type) :
+                    undefined;
+                // JS functions get a free rest parameter if they reference `arguments`
+                var hasRestLikeParameter = ts.hasRestParameter(declaration);
+                if (!hasRestLikeParameter && ts.isInJavaScriptFile(declaration) && !ts.hasJSDocParameterTags(declaration) && containsArgumentsReference(declaration)) {
+                    hasRestLikeParameter = true;
+                    var syntheticArgsSymbol = createSymbol(3 /* Variable */, "args");
+                    syntheticArgsSymbol.type = anyArrayType;
+                    syntheticArgsSymbol.isRestParameter = true;
+                    parameters.push(syntheticArgsSymbol);
+                }
+                links.resolvedSignature = createSignature(declaration, typeParameters, thisParameter, parameters, returnType, typePredicate, minArgumentCount, hasRestLikeParameter, hasLiteralTypes);
             }
+            return links.resolvedSignature;
         }
-        if (matchedNormalizedPrefix) {
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Longest_matching_prefix_for_0_is_1, candidate, matchedNormalizedPrefix);
+        function getSignatureReturnTypeFromDeclaration(declaration, isJSConstructSignature, classType) {
+            if (isJSConstructSignature) {
+                return getTypeFromTypeNode(declaration.parameters[0].type);
             }
-            var suffix = candidate.substr(matchedNormalizedPrefix.length);
-            // first - try to load from a initial location
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Loading_0_from_the_root_dir_1_candidate_location_2, suffix, matchedNormalizedPrefix, candidate);
+            else if (classType) {
+                return classType;
             }
-            var resolvedFileName = loader(candidate, supportedExtensions, failedLookupLocations, !directoryProbablyExists(containingDirectory, state.host), state);
-            if (resolvedFileName) {
-                return resolvedFileName;
+            var typeNode = ts.getEffectiveReturnTypeNode(declaration);
+            if (typeNode) {
+                return getTypeFromTypeNode(typeNode);
             }
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Trying_other_entries_in_rootDirs);
+            // TypeScript 1.0 spec (April 2014):
+            // If only one accessor includes a type annotation, the other behaves as if it had the same type annotation.
+            if (declaration.kind === 153 /* GetAccessor */ && !ts.hasDynamicName(declaration)) {
+                var setter = ts.getDeclarationOfKind(declaration.symbol, 154 /* SetAccessor */);
+                return getAnnotatedAccessorType(setter);
             }
-            // then try to resolve using remaining entries in rootDirs
-            for (var _b = 0, _c = state.compilerOptions.rootDirs; _b < _c.length; _b++) {
-                var rootDir = _c[_b];
-                if (rootDir === matchedRootDir) {
-                    // skip the initially matched entry
-                    continue;
-                }
-                var candidate_1 = ts.combinePaths(ts.normalizePath(rootDir), suffix);
-                if (state.traceEnabled) {
-                    trace(state.host, ts.Diagnostics.Loading_0_from_the_root_dir_1_candidate_location_2, suffix, rootDir, candidate_1);
+            if (ts.nodeIsMissing(declaration.body)) {
+                return anyType;
+            }
+        }
+        function containsArgumentsReference(declaration) {
+            var links = getNodeLinks(declaration);
+            if (links.containsArgumentsReference === undefined) {
+                if (links.flags & 8192 /* CaptureArguments */) {
+                    links.containsArgumentsReference = true;
                 }
-                var baseDirectory = ts.getDirectoryPath(candidate_1);
-                var resolvedFileName_1 = loader(candidate_1, supportedExtensions, failedLookupLocations, !directoryProbablyExists(baseDirectory, state.host), state);
-                if (resolvedFileName_1) {
-                    return resolvedFileName_1;
+                else {
+                    links.containsArgumentsReference = traverse(declaration.body);
                 }
             }
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Module_resolution_using_rootDirs_has_failed);
+            return links.containsArgumentsReference;
+            function traverse(node) {
+                if (!node)
+                    return false;
+                switch (node.kind) {
+                    case 71 /* Identifier */:
+                        return node.text === "arguments" && ts.isPartOfExpression(node);
+                    case 149 /* PropertyDeclaration */:
+                    case 151 /* MethodDeclaration */:
+                    case 153 /* GetAccessor */:
+                    case 154 /* SetAccessor */:
+                        return node.name.kind === 144 /* ComputedPropertyName */
+                            && traverse(node.name);
+                    default:
+                        return !ts.nodeStartsNewLexicalEnvironment(node) && !ts.isPartOfTypeNode(node) && ts.forEachChild(node, traverse);
+                }
             }
         }
-        return undefined;
-    }
-    function tryLoadModuleUsingBaseUrl(moduleName, loader, failedLookupLocations, supportedExtensions, state) {
-        if (!state.compilerOptions.baseUrl) {
-            return undefined;
-        }
-        if (state.traceEnabled) {
-            trace(state.host, ts.Diagnostics.baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1, state.compilerOptions.baseUrl, moduleName);
-        }
-        // string is for exact match
-        var matchedPattern = undefined;
-        if (state.compilerOptions.paths) {
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.paths_option_is_specified_looking_for_a_pattern_to_match_module_name_0, moduleName);
+        function getSignaturesOfSymbol(symbol) {
+            if (!symbol)
+                return emptyArray;
+            var result = [];
+            for (var i = 0; i < symbol.declarations.length; i++) {
+                var node = symbol.declarations[i];
+                switch (node.kind) {
+                    case 160 /* FunctionType */:
+                    case 161 /* ConstructorType */:
+                    case 228 /* FunctionDeclaration */:
+                    case 151 /* MethodDeclaration */:
+                    case 150 /* MethodSignature */:
+                    case 152 /* Constructor */:
+                    case 155 /* CallSignature */:
+                    case 156 /* ConstructSignature */:
+                    case 157 /* IndexSignature */:
+                    case 153 /* GetAccessor */:
+                    case 154 /* SetAccessor */:
+                    case 186 /* FunctionExpression */:
+                    case 187 /* ArrowFunction */:
+                    case 279 /* JSDocFunctionType */:
+                        // Don't include signature if node is the implementation of an overloaded function. A node is considered
+                        // an implementation node if it has a body and the previous node is of the same kind and immediately
+                        // precedes the implementation node (i.e. has the same parent and ends where the implementation starts).
+                        if (i > 0 && node.body) {
+                            var previous = symbol.declarations[i - 1];
+                            if (node.parent === previous.parent && node.kind === previous.kind && node.pos === previous.end) {
+                                break;
+                            }
+                        }
+                        result.push(getSignatureFromDeclaration(node));
+                }
             }
-            matchedPattern = ts.matchPatternOrExact(ts.getOwnKeys(state.compilerOptions.paths), moduleName);
+            return result;
         }
-        if (matchedPattern) {
-            var matchedStar = typeof matchedPattern === "string" ? undefined : ts.matchedText(matchedPattern, moduleName);
-            var matchedPatternText = typeof matchedPattern === "string" ? matchedPattern : ts.patternText(matchedPattern);
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Module_name_0_matched_pattern_1, moduleName, matchedPatternText);
-            }
-            for (var _i = 0, _a = state.compilerOptions.paths[matchedPatternText]; _i < _a.length; _i++) {
-                var subst = _a[_i];
-                var path = matchedStar ? subst.replace("*", matchedStar) : subst;
-                var candidate = ts.normalizePath(ts.combinePaths(state.compilerOptions.baseUrl, path));
-                if (state.traceEnabled) {
-                    trace(state.host, ts.Diagnostics.Trying_substitution_0_candidate_module_location_Colon_1, subst, path);
-                }
-                var resolvedFileName = loader(candidate, supportedExtensions, failedLookupLocations, !directoryProbablyExists(ts.getDirectoryPath(candidate), state.host), state);
-                if (resolvedFileName) {
-                    return resolvedFileName;
+        function resolveExternalModuleTypeByLiteral(name) {
+            var moduleSym = resolveExternalModuleName(name, name);
+            if (moduleSym) {
+                var resolvedModuleSymbol = resolveExternalModuleSymbol(moduleSym);
+                if (resolvedModuleSymbol) {
+                    return getTypeOfSymbol(resolvedModuleSymbol);
                 }
             }
-            return undefined;
+            return anyType;
         }
-        else {
-            var candidate = ts.normalizePath(ts.combinePaths(state.compilerOptions.baseUrl, moduleName));
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Resolving_module_name_0_relative_to_base_url_1_2, moduleName, state.compilerOptions.baseUrl, candidate);
+        function getThisTypeOfSignature(signature) {
+            if (signature.thisParameter) {
+                return getTypeOfSymbol(signature.thisParameter);
             }
-            return loader(candidate, supportedExtensions, failedLookupLocations, !directoryProbablyExists(ts.getDirectoryPath(candidate), state.host), state);
         }
-    }
-    function nodeModuleNameResolver(moduleName, containingFile, compilerOptions, host) {
-        var containingDirectory = ts.getDirectoryPath(containingFile);
-        var supportedExtensions = ts.getSupportedExtensions(compilerOptions);
-        var traceEnabled = isTraceEnabled(compilerOptions, host);
-        var failedLookupLocations = [];
-        var state = { compilerOptions: compilerOptions, host: host, traceEnabled: traceEnabled, skipTsx: false };
-        var resolvedFileName = tryLoadModuleUsingOptionalResolutionSettings(moduleName, containingDirectory, nodeLoadModuleByRelativeName, failedLookupLocations, supportedExtensions, state);
-        var isExternalLibraryImport = false;
-        if (!resolvedFileName) {
-            if (moduleHasNonRelativeName(moduleName)) {
-                if (traceEnabled) {
-                    trace(host, ts.Diagnostics.Loading_module_0_from_node_modules_folder, moduleName);
+        function getReturnTypeOfSignature(signature) {
+            if (!signature.resolvedReturnType) {
+                if (!pushTypeResolution(signature, 3 /* ResolvedReturnType */)) {
+                    return unknownType;
+                }
+                var type = void 0;
+                if (signature.target) {
+                    type = instantiateType(getReturnTypeOfSignature(signature.target), signature.mapper);
+                }
+                else if (signature.unionSignatures) {
+                    type = getUnionType(ts.map(signature.unionSignatures, getReturnTypeOfSignature), /*subtypeReduction*/ true);
+                }
+                else {
+                    type = getReturnTypeFromBody(signature.declaration);
+                }
+                if (!popTypeResolution()) {
+                    type = anyType;
+                    if (noImplicitAny) {
+                        var declaration = signature.declaration;
+                        var name_20 = ts.getNameOfDeclaration(declaration);
+                        if (name_20) {
+                            error(name_20, ts.Diagnostics._0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions, ts.declarationNameToString(name_20));
+                        }
+                        else {
+                            error(declaration, ts.Diagnostics.Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions);
+                        }
+                    }
                 }
-                resolvedFileName = loadModuleFromNodeModules(moduleName, containingDirectory, failedLookupLocations, state, /*checkOneLevel*/ false);
-                isExternalLibraryImport = resolvedFileName !== undefined;
+                signature.resolvedReturnType = type;
             }
-            else {
-                var candidate = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
-                resolvedFileName = nodeLoadModuleByRelativeName(candidate, supportedExtensions, failedLookupLocations, /*onlyRecordFailures*/ false, state);
+            return signature.resolvedReturnType;
+        }
+        function getRestTypeOfSignature(signature) {
+            if (signature.hasRestParameter) {
+                var type = getTypeOfSymbol(ts.lastOrUndefined(signature.parameters));
+                if (getObjectFlags(type) & 4 /* Reference */ && type.target === globalArrayType) {
+                    return type.typeArguments[0];
+                }
             }
+            return anyType;
         }
-        if (resolvedFileName && host.realpath) {
-            var originalFileName = resolvedFileName;
-            resolvedFileName = ts.normalizePath(host.realpath(resolvedFileName));
-            if (traceEnabled) {
-                trace(host, ts.Diagnostics.Resolving_real_path_for_0_result_1, originalFileName, resolvedFileName);
+        function getSignatureInstantiation(signature, typeArguments) {
+            typeArguments = fillMissingTypeArguments(typeArguments, signature.typeParameters, getMinTypeArgumentCount(signature.typeParameters));
+            var instantiations = signature.instantiations || (signature.instantiations = ts.createMap());
+            var id = getTypeListId(typeArguments);
+            var instantiation = instantiations.get(id);
+            if (!instantiation) {
+                instantiations.set(id, instantiation = createSignatureInstantiation(signature, typeArguments));
             }
+            return instantiation;
         }
-        return createResolvedModule(resolvedFileName, isExternalLibraryImport, failedLookupLocations);
-    }
-    ts.nodeModuleNameResolver = nodeModuleNameResolver;
-    function nodeLoadModuleByRelativeName(candidate, supportedExtensions, failedLookupLocations, onlyRecordFailures, state) {
-        if (state.traceEnabled) {
-            trace(state.host, ts.Diagnostics.Loading_module_as_file_Slash_folder_candidate_module_location_0, candidate);
+        function createSignatureInstantiation(signature, typeArguments) {
+            return instantiateSignature(signature, createTypeMapper(signature.typeParameters, typeArguments), /*eraseTypeParameters*/ true);
         }
-        var resolvedFileName = !ts.pathEndsWithDirectorySeparator(candidate) && loadModuleFromFile(candidate, supportedExtensions, failedLookupLocations, onlyRecordFailures, state);
-        return resolvedFileName || loadNodeModuleFromDirectory(supportedExtensions, candidate, failedLookupLocations, onlyRecordFailures, state);
-    }
-    /* @internal */
-    function directoryProbablyExists(directoryName, host) {
-        // if host does not support 'directoryExists' assume that directory will exist
-        return !host.directoryExists || host.directoryExists(directoryName);
-    }
-    ts.directoryProbablyExists = directoryProbablyExists;
-    /**
-     * @param {boolean} onlyRecordFailures - if true then function won't try to actually load files but instead record all attempts as failures. This flag is necessary
-     * in cases when we know upfront that all load attempts will fail (because containing folder does not exists) however we still need to record all failed lookup locations.
-     */
-    function loadModuleFromFile(candidate, extensions, failedLookupLocation, onlyRecordFailures, state) {
-        // First, try adding an extension. An import of "foo" could be matched by a file "foo.ts", or "foo.js" by "foo.js.ts"
-        var resolvedByAddingExtension = tryAddingExtensions(candidate, extensions, failedLookupLocation, onlyRecordFailures, state);
-        if (resolvedByAddingExtension) {
-            return resolvedByAddingExtension;
+        function getErasedSignature(signature) {
+            if (!signature.typeParameters)
+                return signature;
+            if (!signature.erasedSignatureCache) {
+                signature.erasedSignatureCache = instantiateSignature(signature, createTypeEraser(signature.typeParameters), /*eraseTypeParameters*/ true);
+            }
+            return signature.erasedSignatureCache;
         }
-        // If that didn't work, try stripping a ".js" or ".jsx" extension and replacing it with a TypeScript one;
-        // e.g. "./foo.js" can be matched by "./foo.ts" or "./foo.d.ts"
-        if (ts.hasJavaScriptFileExtension(candidate)) {
-            var extensionless = ts.removeFileExtension(candidate);
-            if (state.traceEnabled) {
-                var extension = candidate.substring(extensionless.length);
-                trace(state.host, ts.Diagnostics.File_name_0_has_a_1_extension_stripping_it, candidate, extension);
+        function getOrCreateTypeFromSignature(signature) {
+            // There are two ways to declare a construct signature, one is by declaring a class constructor
+            // using the constructor keyword, and the other is declaring a bare construct signature in an
+            // object type literal or interface (using the new keyword). Each way of declaring a constructor
+            // will result in a different declaration kind.
+            if (!signature.isolatedSignatureType) {
+                var isConstructor = signature.declaration.kind === 152 /* Constructor */ || signature.declaration.kind === 156 /* ConstructSignature */;
+                var type = createObjectType(16 /* Anonymous */);
+                type.members = emptySymbols;
+                type.properties = emptyArray;
+                type.callSignatures = !isConstructor ? [signature] : emptyArray;
+                type.constructSignatures = isConstructor ? [signature] : emptyArray;
+                signature.isolatedSignatureType = type;
             }
-            return tryAddingExtensions(extensionless, extensions, failedLookupLocation, onlyRecordFailures, state);
+            return signature.isolatedSignatureType;
         }
-    }
-    /** Try to return an existing file that adds one of the `extensions` to `candidate`. */
-    function tryAddingExtensions(candidate, extensions, failedLookupLocation, onlyRecordFailures, state) {
-        if (!onlyRecordFailures) {
-            // check if containing folder exists - if it doesn't then just record failures for all supported extensions without disk probing
-            var directory = ts.getDirectoryPath(candidate);
-            if (directory) {
-                onlyRecordFailures = !directoryProbablyExists(directory, state.host);
+        function getIndexSymbol(symbol) {
+            return symbol.members.get("__index");
+        }
+        function getIndexDeclarationOfSymbol(symbol, kind) {
+            var syntaxKind = kind === 1 /* Number */ ? 133 /* NumberKeyword */ : 136 /* StringKeyword */;
+            var indexSymbol = getIndexSymbol(symbol);
+            if (indexSymbol) {
+                for (var _i = 0, _a = indexSymbol.declarations; _i < _a.length; _i++) {
+                    var decl = _a[_i];
+                    var node = decl;
+                    if (node.parameters.length === 1) {
+                        var parameter = node.parameters[0];
+                        if (parameter && parameter.type && parameter.type.kind === syntaxKind) {
+                            return node;
+                        }
+                    }
+                }
             }
+            return undefined;
         }
-        return ts.forEach(extensions, function (ext) {
-            return !(state.skipTsx && ts.isJsxOrTsxExtension(ext)) && tryFile(candidate + ext, failedLookupLocation, onlyRecordFailures, state);
-        });
-    }
-    /** Return the file if it exists. */
-    function tryFile(fileName, failedLookupLocation, onlyRecordFailures, state) {
-        if (!onlyRecordFailures && state.host.fileExists(fileName)) {
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.File_0_exist_use_it_as_a_name_resolution_result, fileName);
-            }
-            return fileName;
+        function createIndexInfo(type, isReadonly, declaration) {
+            return { type: type, isReadonly: isReadonly, declaration: declaration };
         }
-        else {
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.File_0_does_not_exist, fileName);
+        function getIndexInfoOfSymbol(symbol, kind) {
+            var declaration = getIndexDeclarationOfSymbol(symbol, kind);
+            if (declaration) {
+                return createIndexInfo(declaration.type ? getTypeFromTypeNode(declaration.type) : anyType, (ts.getModifierFlags(declaration) & 64 /* Readonly */) !== 0, declaration);
             }
-            failedLookupLocation.push(fileName);
             return undefined;
         }
-    }
-    function loadNodeModuleFromDirectory(extensions, candidate, failedLookupLocation, onlyRecordFailures, state) {
-        var packageJsonPath = pathToPackageJson(candidate);
-        var directoryExists = !onlyRecordFailures && directoryProbablyExists(candidate, state.host);
-        if (directoryExists && state.host.fileExists(packageJsonPath)) {
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Found_package_json_at_0, packageJsonPath);
-            }
-            var typesFile = tryReadTypesSection(packageJsonPath, candidate, state);
-            if (typesFile) {
-                var onlyRecordFailures_1 = !directoryProbablyExists(ts.getDirectoryPath(typesFile), state.host);
-                // A package.json "typings" may specify an exact filename, or may choose to omit an extension.
-                var result = tryFile(typesFile, failedLookupLocation, onlyRecordFailures_1, state) ||
-                    tryAddingExtensions(typesFile, extensions, failedLookupLocation, onlyRecordFailures_1, state);
-                if (result) {
-                    return result;
+        function getConstraintDeclaration(type) {
+            return ts.getDeclarationOfKind(type.symbol, 145 /* TypeParameter */).constraint;
+        }
+        function getConstraintFromTypeParameter(typeParameter) {
+            if (!typeParameter.constraint) {
+                if (typeParameter.target) {
+                    var targetConstraint = getConstraintOfTypeParameter(typeParameter.target);
+                    typeParameter.constraint = targetConstraint ? instantiateType(targetConstraint, typeParameter.mapper) : noConstraintType;
                 }
-            }
-            else {
-                if (state.traceEnabled) {
-                    trace(state.host, ts.Diagnostics.package_json_does_not_have_types_field);
+                else {
+                    var constraintDeclaration = getConstraintDeclaration(typeParameter);
+                    typeParameter.constraint = constraintDeclaration ? getTypeFromTypeNode(constraintDeclaration) : noConstraintType;
                 }
             }
+            return typeParameter.constraint === noConstraintType ? undefined : typeParameter.constraint;
         }
-        else {
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.File_0_does_not_exist, packageJsonPath);
-            }
-            // record package json as one of failed lookup locations - in the future if this file will appear it will invalidate resolution results
-            failedLookupLocation.push(packageJsonPath);
-        }
-        return loadModuleFromFile(ts.combinePaths(candidate, "index"), extensions, failedLookupLocation, !directoryExists, state);
-    }
-    function pathToPackageJson(directory) {
-        return ts.combinePaths(directory, "package.json");
-    }
-    function loadModuleFromNodeModulesFolder(moduleName, directory, failedLookupLocations, state) {
-        var nodeModulesFolder = ts.combinePaths(directory, "node_modules");
-        var nodeModulesFolderExists = directoryProbablyExists(nodeModulesFolder, state.host);
-        var candidate = ts.normalizePath(ts.combinePaths(nodeModulesFolder, moduleName));
-        var supportedExtensions = ts.getSupportedExtensions(state.compilerOptions);
-        var result = loadModuleFromFile(candidate, supportedExtensions, failedLookupLocations, !nodeModulesFolderExists, state);
-        if (result) {
-            return result;
-        }
-        result = loadNodeModuleFromDirectory(supportedExtensions, candidate, failedLookupLocations, !nodeModulesFolderExists, state);
-        if (result) {
-            return result;
+        function getParentSymbolOfTypeParameter(typeParameter) {
+            return getSymbolOfNode(ts.getDeclarationOfKind(typeParameter.symbol, 145 /* TypeParameter */).parent);
         }
-    }
-    /* @internal */
-    function loadModuleFromNodeModules(moduleName, directory, failedLookupLocations, state, checkOneLevel) {
-        directory = ts.normalizeSlashes(directory);
-        while (true) {
-            var baseName = ts.getBaseFileName(directory);
-            if (baseName !== "node_modules") {
-                // Try to load source from the package
-                var packageResult = loadModuleFromNodeModulesFolder(moduleName, directory, failedLookupLocations, state);
-                if (packageResult && ts.hasTypeScriptFileExtension(packageResult)) {
-                    // Always prefer a TypeScript (.ts, .tsx, .d.ts) file shipped with the package
-                    return packageResult;
-                }
-                else {
-                    // Else prefer a types package over non-TypeScript results (e.g. JavaScript files)
-                    var typesResult = loadModuleFromNodeModulesFolder(ts.combinePaths("@types", moduleName), directory, failedLookupLocations, state);
-                    if (typesResult || packageResult) {
-                        return typesResult || packageResult;
+        function getTypeListId(types) {
+            var result = "";
+            if (types) {
+                var length_4 = types.length;
+                var i = 0;
+                while (i < length_4) {
+                    var startId = types[i].id;
+                    var count = 1;
+                    while (i + count < length_4 && types[i + count].id === startId + count) {
+                        count++;
+                    }
+                    if (result.length) {
+                        result += ",";
+                    }
+                    result += startId;
+                    if (count > 1) {
+                        result += ":" + count;
                     }
+                    i += count;
                 }
             }
-            var parentPath = ts.getDirectoryPath(directory);
-            if (parentPath === directory || checkOneLevel) {
-                break;
-            }
-            directory = parentPath;
-        }
-        return undefined;
-    }
-    ts.loadModuleFromNodeModules = loadModuleFromNodeModules;
-    function classicNameResolver(moduleName, containingFile, compilerOptions, host) {
-        var traceEnabled = isTraceEnabled(compilerOptions, host);
-        var state = { compilerOptions: compilerOptions, host: host, traceEnabled: traceEnabled, skipTsx: !compilerOptions.jsx };
-        var failedLookupLocations = [];
-        var supportedExtensions = ts.getSupportedExtensions(compilerOptions);
-        var containingDirectory = ts.getDirectoryPath(containingFile);
-        var resolvedFileName = tryLoadModuleUsingOptionalResolutionSettings(moduleName, containingDirectory, loadModuleFromFile, failedLookupLocations, supportedExtensions, state);
-        if (resolvedFileName) {
-            return createResolvedModule(resolvedFileName, /*isExternalLibraryImport*/ false, failedLookupLocations);
+            return result;
         }
-        var referencedSourceFile;
-        if (moduleHasNonRelativeName(moduleName)) {
-            while (true) {
-                var searchName = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
-                referencedSourceFile = loadModuleFromFile(searchName, supportedExtensions, failedLookupLocations, /*onlyRecordFailures*/ false, state);
-                if (referencedSourceFile) {
-                    break;
-                }
-                var parentPath = ts.getDirectoryPath(containingDirectory);
-                if (parentPath === containingDirectory) {
-                    break;
+        // This function is used to propagate certain flags when creating new object type references and union types.
+        // It is only necessary to do so if a constituent type might be the undefined type, the null type, the type
+        // of an object literal or the anyFunctionType. This is because there are operations in the type checker
+        // that care about the presence of such types at arbitrary depth in a containing type.
+        function getPropagatingFlagsOfTypes(types, excludeKinds) {
+            var result = 0;
+            for (var _i = 0, types_4 = types; _i < types_4.length; _i++) {
+                var type = types_4[_i];
+                if (!(type.flags & excludeKinds)) {
+                    result |= type.flags;
                 }
-                containingDirectory = parentPath;
             }
+            return result & 14680064 /* PropagatingFlags */;
         }
-        else {
-            var candidate = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
-            referencedSourceFile = loadModuleFromFile(candidate, supportedExtensions, failedLookupLocations, /*onlyRecordFailures*/ false, state);
+        function createTypeReference(target, typeArguments) {
+            var id = getTypeListId(typeArguments);
+            var type = target.instantiations.get(id);
+            if (!type) {
+                type = createObjectType(4 /* Reference */, target.symbol);
+                target.instantiations.set(id, type);
+                type.flags |= typeArguments ? getPropagatingFlagsOfTypes(typeArguments, /*excludeKinds*/ 0) : 0;
+                type.target = target;
+                type.typeArguments = typeArguments;
+            }
+            return type;
         }
-        return referencedSourceFile
-            ? { resolvedModule: { resolvedFileName: referencedSourceFile }, failedLookupLocations: failedLookupLocations }
-            : { resolvedModule: undefined, failedLookupLocations: failedLookupLocations };
-    }
-    ts.classicNameResolver = classicNameResolver;
-})(ts || (ts = {}));
-/// <reference path="moduleNameResolver.ts"/>
-/// <reference path="binder.ts"/>
-/* @internal */
-var ts;
-(function (ts) {
-    var ambientModuleSymbolRegex = /^".+"$/;
-    var nextSymbolId = 1;
-    var nextNodeId = 1;
-    var nextMergeId = 1;
-    var nextFlowId = 1;
-    function getNodeId(node) {
-        if (!node.id) {
-            node.id = nextNodeId;
-            nextNodeId++;
+        function cloneTypeReference(source) {
+            var type = createType(source.flags);
+            type.symbol = source.symbol;
+            type.objectFlags = source.objectFlags;
+            type.target = source.target;
+            type.typeArguments = source.typeArguments;
+            return type;
         }
-        return node.id;
-    }
-    ts.getNodeId = getNodeId;
-    function getSymbolId(symbol) {
-        if (!symbol.id) {
-            symbol.id = nextSymbolId;
-            nextSymbolId++;
+        function getTypeReferenceArity(type) {
+            return ts.length(type.target.typeParameters);
         }
-        return symbol.id;
-    }
-    ts.getSymbolId = getSymbolId;
-    function createTypeChecker(host, produceDiagnostics) {
-        // Cancellation that controls whether or not we can cancel in the middle of type checking.
-        // In general cancelling is *not* safe for the type checker.  We might be in the middle of
-        // computing something, and we will leave our internals in an inconsistent state.  Callers
-        // who set the cancellation token should catch if a cancellation exception occurs, and
-        // should throw away and create a new TypeChecker.
-        //
-        // Currently we only support setting the cancellation token when getting diagnostics.  This
-        // is because diagnostics can be quite expensive, and we want to allow hosts to bail out if
-        // they no longer need the information (for example, if the user started editing again).
-        var cancellationToken;
-        var Symbol = ts.objectAllocator.getSymbolConstructor();
-        var Type = ts.objectAllocator.getTypeConstructor();
-        var Signature = ts.objectAllocator.getSignatureConstructor();
-        var typeCount = 0;
-        var symbolCount = 0;
-        var emptyArray = [];
-        var emptySymbols = ts.createMap();
-        var compilerOptions = host.getCompilerOptions();
-        var languageVersion = compilerOptions.target || 0 /* ES3 */;
-        var modulekind = ts.getEmitModuleKind(compilerOptions);
-        var noUnusedIdentifiers = !!compilerOptions.noUnusedLocals || !!compilerOptions.noUnusedParameters;
-        var allowSyntheticDefaultImports = typeof compilerOptions.allowSyntheticDefaultImports !== "undefined" ? compilerOptions.allowSyntheticDefaultImports : modulekind === ts.ModuleKind.System;
-        var strictNullChecks = compilerOptions.strictNullChecks;
-        var emitResolver = createResolver();
-        var undefinedSymbol = createSymbol(4 /* Property */ | 67108864 /* Transient */, "undefined");
-        undefinedSymbol.declarations = [];
-        var argumentsSymbol = createSymbol(4 /* Property */ | 67108864 /* Transient */, "arguments");
-        var checker = {
-            getNodeCount: function () { return ts.sum(host.getSourceFiles(), "nodeCount"); },
-            getIdentifierCount: function () { return ts.sum(host.getSourceFiles(), "identifierCount"); },
-            getSymbolCount: function () { return ts.sum(host.getSourceFiles(), "symbolCount") + symbolCount; },
-            getTypeCount: function () { return typeCount; },
-            isUndefinedSymbol: function (symbol) { return symbol === undefinedSymbol; },
-            isArgumentsSymbol: function (symbol) { return symbol === argumentsSymbol; },
-            isUnknownSymbol: function (symbol) { return symbol === unknownSymbol; },
-            getDiagnostics: getDiagnostics,
-            getGlobalDiagnostics: getGlobalDiagnostics,
-            getTypeOfSymbolAtLocation: getTypeOfSymbolAtLocation,
-            getSymbolsOfParameterPropertyDeclaration: getSymbolsOfParameterPropertyDeclaration,
-            getDeclaredTypeOfSymbol: getDeclaredTypeOfSymbol,
-            getPropertiesOfType: getPropertiesOfType,
-            getPropertyOfType: getPropertyOfType,
-            getSignaturesOfType: getSignaturesOfType,
-            getIndexTypeOfType: getIndexTypeOfType,
-            getBaseTypes: getBaseTypes,
-            getReturnTypeOfSignature: getReturnTypeOfSignature,
-            getNonNullableType: getNonNullableType,
-            getSymbolsInScope: getSymbolsInScope,
-            getSymbolAtLocation: getSymbolAtLocation,
-            getShorthandAssignmentValueSymbol: getShorthandAssignmentValueSymbol,
-            getExportSpecifierLocalTargetSymbol: getExportSpecifierLocalTargetSymbol,
-            getTypeAtLocation: getTypeOfNode,
-            getPropertySymbolOfDestructuringAssignment: getPropertySymbolOfDestructuringAssignment,
-            typeToString: typeToString,
-            getSymbolDisplayBuilder: getSymbolDisplayBuilder,
-            symbolToString: symbolToString,
-            getAugmentedPropertiesOfType: getAugmentedPropertiesOfType,
-            getRootSymbols: getRootSymbols,
-            getContextualType: getContextualType,
-            getFullyQualifiedName: getFullyQualifiedName,
-            getResolvedSignature: getResolvedSignature,
-            getConstantValue: getConstantValue,
-            isValidPropertyAccess: isValidPropertyAccess,
-            getSignatureFromDeclaration: getSignatureFromDeclaration,
-            isImplementationOfOverload: isImplementationOfOverload,
-            getAliasedSymbol: resolveAlias,
-            getEmitResolver: getEmitResolver,
-            getExportsOfModule: getExportsOfModuleAsArray,
-            getAmbientModules: getAmbientModules,
-            getJsxElementAttributesType: getJsxElementAttributesType,
-            getJsxIntrinsicTagNames: getJsxIntrinsicTagNames,
-            isOptionalParameter: isOptionalParameter
-        };
-        var tupleTypes = [];
-        var unionTypes = ts.createMap();
-        var intersectionTypes = ts.createMap();
-        var stringLiteralTypes = ts.createMap();
-        var numericLiteralTypes = ts.createMap();
-        var unknownSymbol = createSymbol(4 /* Property */ | 67108864 /* Transient */, "unknown");
-        var resolvingSymbol = createSymbol(67108864 /* Transient */, "__resolving__");
-        var anyType = createIntrinsicType(1 /* Any */, "any");
-        var unknownType = createIntrinsicType(1 /* Any */, "unknown");
-        var undefinedType = createIntrinsicType(2048 /* Undefined */, "undefined");
-        var undefinedWideningType = strictNullChecks ? undefinedType : createIntrinsicType(2048 /* Undefined */ | 33554432 /* ContainsWideningType */, "undefined");
-        var nullType = createIntrinsicType(4096 /* Null */, "null");
-        var nullWideningType = strictNullChecks ? nullType : createIntrinsicType(4096 /* Null */ | 33554432 /* ContainsWideningType */, "null");
-        var stringType = createIntrinsicType(2 /* String */, "string");
-        var numberType = createIntrinsicType(4 /* Number */, "number");
-        var trueType = createIntrinsicType(128 /* BooleanLiteral */, "true");
-        var falseType = createIntrinsicType(128 /* BooleanLiteral */, "false");
-        var booleanType = createBooleanType([trueType, falseType]);
-        var esSymbolType = createIntrinsicType(512 /* ESSymbol */, "symbol");
-        var voidType = createIntrinsicType(1024 /* Void */, "void");
-        var neverType = createIntrinsicType(8192 /* Never */, "never");
-        var silentNeverType = createIntrinsicType(8192 /* Never */, "never");
-        var emptyObjectType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
-        var emptyGenericType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
-        emptyGenericType.instantiations = ts.createMap();
-        var anyFunctionType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
-        // The anyFunctionType contains the anyFunctionType by definition. The flag is further propagated
-        // in getPropagatingFlagsOfTypes, and it is checked in inferFromTypes.
-        anyFunctionType.flags |= 134217728 /* ContainsAnyFunctionType */;
-        var noConstraintType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
-        var anySignature = createSignature(undefined, undefined, undefined, emptyArray, anyType, /*typePredicate*/ undefined, 0, /*hasRestParameter*/ false, /*hasLiteralTypes*/ false);
-        var unknownSignature = createSignature(undefined, undefined, undefined, emptyArray, unknownType, /*typePredicate*/ undefined, 0, /*hasRestParameter*/ false, /*hasLiteralTypes*/ false);
-        var resolvingSignature = createSignature(undefined, undefined, undefined, emptyArray, anyType, /*typePredicate*/ undefined, 0, /*hasRestParameter*/ false, /*hasLiteralTypes*/ false);
-        var silentNeverSignature = createSignature(undefined, undefined, undefined, emptyArray, silentNeverType, /*typePredicate*/ undefined, 0, /*hasRestParameter*/ false, /*hasLiteralTypes*/ false);
-        var enumNumberIndexInfo = createIndexInfo(stringType, /*isReadonly*/ true);
-        var globals = ts.createMap();
         /**
-         * List of every ambient module with a "*" wildcard.
-         * Unlike other ambient modules, these can't be stored in `globals` because symbol tables only deal with exact matches.
-         * This is only used if there is no exact match.
-        */
-        var patternAmbientModules;
-        var getGlobalESSymbolConstructorSymbol;
-        var getGlobalPromiseConstructorSymbol;
-        var tryGetGlobalPromiseConstructorSymbol;
-        var globalObjectType;
-        var globalFunctionType;
-        var globalArrayType;
-        var globalReadonlyArrayType;
-        var globalStringType;
-        var globalNumberType;
-        var globalBooleanType;
-        var globalRegExpType;
-        var anyArrayType;
-        var anyReadonlyArrayType;
-        // The library files are only loaded when the feature is used.
-        // This allows users to just specify library files they want to used through --lib
-        // and they will not get an error from not having unrelated library files
-        var getGlobalTemplateStringsArrayType;
-        var getGlobalESSymbolType;
-        var getGlobalIterableType;
-        var getGlobalIteratorType;
-        var getGlobalIterableIteratorType;
-        var getGlobalClassDecoratorType;
-        var getGlobalParameterDecoratorType;
-        var getGlobalPropertyDecoratorType;
-        var getGlobalMethodDecoratorType;
-        var getGlobalTypedPropertyDescriptorType;
-        var getGlobalPromiseType;
-        var tryGetGlobalPromiseType;
-        var getGlobalPromiseLikeType;
-        var getInstantiatedGlobalPromiseLikeType;
-        var getGlobalPromiseConstructorLikeType;
-        var getGlobalThenableType;
-        var jsxElementClassType;
-        var deferredNodes;
-        var deferredUnusedIdentifierNodes;
-        var flowLoopStart = 0;
-        var flowLoopCount = 0;
-        var visitedFlowCount = 0;
-        var emptyStringType = getLiteralTypeForText(32 /* StringLiteral */, "");
-        var zeroType = getLiteralTypeForText(64 /* NumberLiteral */, "0");
-        var resolutionTargets = [];
-        var resolutionResults = [];
-        var resolutionPropertyNames = [];
-        var mergedSymbols = [];
-        var symbolLinks = [];
-        var nodeLinks = [];
-        var flowLoopCaches = [];
-        var flowLoopNodes = [];
-        var flowLoopKeys = [];
-        var flowLoopTypes = [];
-        var visitedFlowNodes = [];
-        var visitedFlowTypes = [];
-        var potentialThisCollisions = [];
-        var awaitedTypeStack = [];
-        var diagnostics = ts.createDiagnosticCollection();
-        var TypeFacts;
-        (function (TypeFacts) {
-            TypeFacts[TypeFacts["None"] = 0] = "None";
-            TypeFacts[TypeFacts["TypeofEQString"] = 1] = "TypeofEQString";
-            TypeFacts[TypeFacts["TypeofEQNumber"] = 2] = "TypeofEQNumber";
-            TypeFacts[TypeFacts["TypeofEQBoolean"] = 4] = "TypeofEQBoolean";
-            TypeFacts[TypeFacts["TypeofEQSymbol"] = 8] = "TypeofEQSymbol";
-            TypeFacts[TypeFacts["TypeofEQObject"] = 16] = "TypeofEQObject";
-            TypeFacts[TypeFacts["TypeofEQFunction"] = 32] = "TypeofEQFunction";
-            TypeFacts[TypeFacts["TypeofEQHostObject"] = 64] = "TypeofEQHostObject";
-            TypeFacts[TypeFacts["TypeofNEString"] = 128] = "TypeofNEString";
-            TypeFacts[TypeFacts["TypeofNENumber"] = 256] = "TypeofNENumber";
-            TypeFacts[TypeFacts["TypeofNEBoolean"] = 512] = "TypeofNEBoolean";
-            TypeFacts[TypeFacts["TypeofNESymbol"] = 1024] = "TypeofNESymbol";
-            TypeFacts[TypeFacts["TypeofNEObject"] = 2048] = "TypeofNEObject";
-            TypeFacts[TypeFacts["TypeofNEFunction"] = 4096] = "TypeofNEFunction";
-            TypeFacts[TypeFacts["TypeofNEHostObject"] = 8192] = "TypeofNEHostObject";
-            TypeFacts[TypeFacts["EQUndefined"] = 16384] = "EQUndefined";
-            TypeFacts[TypeFacts["EQNull"] = 32768] = "EQNull";
-            TypeFacts[TypeFacts["EQUndefinedOrNull"] = 65536] = "EQUndefinedOrNull";
-            TypeFacts[TypeFacts["NEUndefined"] = 131072] = "NEUndefined";
-            TypeFacts[TypeFacts["NENull"] = 262144] = "NENull";
-            TypeFacts[TypeFacts["NEUndefinedOrNull"] = 524288] = "NEUndefinedOrNull";
-            TypeFacts[TypeFacts["Truthy"] = 1048576] = "Truthy";
-            TypeFacts[TypeFacts["Falsy"] = 2097152] = "Falsy";
-            TypeFacts[TypeFacts["Discriminatable"] = 4194304] = "Discriminatable";
-            TypeFacts[TypeFacts["All"] = 8388607] = "All";
-            // The following members encode facts about particular kinds of types for use in the getTypeFacts function.
-            // The presence of a particular fact means that the given test is true for some (and possibly all) values
-            // of that kind of type.
-            TypeFacts[TypeFacts["BaseStringStrictFacts"] = 933633] = "BaseStringStrictFacts";
-            TypeFacts[TypeFacts["BaseStringFacts"] = 3145473] = "BaseStringFacts";
-            TypeFacts[TypeFacts["StringStrictFacts"] = 4079361] = "StringStrictFacts";
-            TypeFacts[TypeFacts["StringFacts"] = 4194049] = "StringFacts";
-            TypeFacts[TypeFacts["EmptyStringStrictFacts"] = 3030785] = "EmptyStringStrictFacts";
-            TypeFacts[TypeFacts["EmptyStringFacts"] = 3145473] = "EmptyStringFacts";
-            TypeFacts[TypeFacts["NonEmptyStringStrictFacts"] = 1982209] = "NonEmptyStringStrictFacts";
-            TypeFacts[TypeFacts["NonEmptyStringFacts"] = 4194049] = "NonEmptyStringFacts";
-            TypeFacts[TypeFacts["BaseNumberStrictFacts"] = 933506] = "BaseNumberStrictFacts";
-            TypeFacts[TypeFacts["BaseNumberFacts"] = 3145346] = "BaseNumberFacts";
-            TypeFacts[TypeFacts["NumberStrictFacts"] = 4079234] = "NumberStrictFacts";
-            TypeFacts[TypeFacts["NumberFacts"] = 4193922] = "NumberFacts";
-            TypeFacts[TypeFacts["ZeroStrictFacts"] = 3030658] = "ZeroStrictFacts";
-            TypeFacts[TypeFacts["ZeroFacts"] = 3145346] = "ZeroFacts";
-            TypeFacts[TypeFacts["NonZeroStrictFacts"] = 1982082] = "NonZeroStrictFacts";
-            TypeFacts[TypeFacts["NonZeroFacts"] = 4193922] = "NonZeroFacts";
-            TypeFacts[TypeFacts["BaseBooleanStrictFacts"] = 933252] = "BaseBooleanStrictFacts";
-            TypeFacts[TypeFacts["BaseBooleanFacts"] = 3145092] = "BaseBooleanFacts";
-            TypeFacts[TypeFacts["BooleanStrictFacts"] = 4078980] = "BooleanStrictFacts";
-            TypeFacts[TypeFacts["BooleanFacts"] = 4193668] = "BooleanFacts";
-            TypeFacts[TypeFacts["FalseStrictFacts"] = 3030404] = "FalseStrictFacts";
-            TypeFacts[TypeFacts["FalseFacts"] = 3145092] = "FalseFacts";
-            TypeFacts[TypeFacts["TrueStrictFacts"] = 1981828] = "TrueStrictFacts";
-            TypeFacts[TypeFacts["TrueFacts"] = 4193668] = "TrueFacts";
-            TypeFacts[TypeFacts["SymbolStrictFacts"] = 1981320] = "SymbolStrictFacts";
-            TypeFacts[TypeFacts["SymbolFacts"] = 4193160] = "SymbolFacts";
-            TypeFacts[TypeFacts["ObjectStrictFacts"] = 6166480] = "ObjectStrictFacts";
-            TypeFacts[TypeFacts["ObjectFacts"] = 8378320] = "ObjectFacts";
-            TypeFacts[TypeFacts["FunctionStrictFacts"] = 6164448] = "FunctionStrictFacts";
-            TypeFacts[TypeFacts["FunctionFacts"] = 8376288] = "FunctionFacts";
-            TypeFacts[TypeFacts["UndefinedFacts"] = 2457472] = "UndefinedFacts";
-            TypeFacts[TypeFacts["NullFacts"] = 2340752] = "NullFacts";
-        })(TypeFacts || (TypeFacts = {}));
-        var typeofEQFacts = ts.createMap({
-            "string": 1 /* TypeofEQString */,
-            "number": 2 /* TypeofEQNumber */,
-            "boolean": 4 /* TypeofEQBoolean */,
-            "symbol": 8 /* TypeofEQSymbol */,
-            "undefined": 16384 /* EQUndefined */,
-            "object": 16 /* TypeofEQObject */,
-            "function": 32 /* TypeofEQFunction */
-        });
-        var typeofNEFacts = ts.createMap({
-            "string": 128 /* TypeofNEString */,
-            "number": 256 /* TypeofNENumber */,
-            "boolean": 512 /* TypeofNEBoolean */,
-            "symbol": 1024 /* TypeofNESymbol */,
-            "undefined": 131072 /* NEUndefined */,
-            "object": 2048 /* TypeofNEObject */,
-            "function": 4096 /* TypeofNEFunction */
-        });
-        var typeofTypesByName = ts.createMap({
-            "string": stringType,
-            "number": numberType,
-            "boolean": booleanType,
-            "symbol": esSymbolType,
-            "undefined": undefinedType
-        });
-        var jsxElementType;
-        /** Things we lazy load from the JSX namespace */
-        var jsxTypes = ts.createMap();
-        var JsxNames = {
-            JSX: "JSX",
-            IntrinsicElements: "IntrinsicElements",
-            ElementClass: "ElementClass",
-            ElementAttributesPropertyNameContainer: "ElementAttributesProperty",
-            Element: "Element",
-            IntrinsicAttributes: "IntrinsicAttributes",
-            IntrinsicClassAttributes: "IntrinsicClassAttributes"
-        };
-        var subtypeRelation = ts.createMap();
-        var assignableRelation = ts.createMap();
-        var comparableRelation = ts.createMap();
-        var identityRelation = ts.createMap();
-        var enumRelation = ts.createMap();
-        // This is for caching the result of getSymbolDisplayBuilder. Do not access directly.
-        var _displayBuilder;
-        var TypeSystemPropertyName;
-        (function (TypeSystemPropertyName) {
-            TypeSystemPropertyName[TypeSystemPropertyName["Type"] = 0] = "Type";
-            TypeSystemPropertyName[TypeSystemPropertyName["ResolvedBaseConstructorType"] = 1] = "ResolvedBaseConstructorType";
-            TypeSystemPropertyName[TypeSystemPropertyName["DeclaredType"] = 2] = "DeclaredType";
-            TypeSystemPropertyName[TypeSystemPropertyName["ResolvedReturnType"] = 3] = "ResolvedReturnType";
-        })(TypeSystemPropertyName || (TypeSystemPropertyName = {}));
-        var builtinGlobals = ts.createMap();
-        builtinGlobals[undefinedSymbol.name] = undefinedSymbol;
-        initializeTypeChecker();
-        return checker;
-        function getEmitResolver(sourceFile, cancellationToken) {
-            // Ensure we have all the type information in place for this file so that all the
-            // emitter questions of this resolver will return the right information.
-            getDiagnostics(sourceFile, cancellationToken);
-            return emitResolver;
-        }
-        function error(location, message, arg0, arg1, arg2) {
-            var diagnostic = location
-                ? ts.createDiagnosticForNode(location, message, arg0, arg1, arg2)
-                : ts.createCompilerDiagnostic(message, arg0, arg1, arg2);
-            diagnostics.add(diagnostic);
-        }
-        function createSymbol(flags, name) {
-            symbolCount++;
-            return new Symbol(flags, name);
-        }
-        function getExcludedSymbolFlags(flags) {
-            var result = 0;
-            if (flags & 2 /* BlockScopedVariable */)
-                result |= 107455 /* BlockScopedVariableExcludes */;
-            if (flags & 1 /* FunctionScopedVariable */)
-                result |= 107454 /* FunctionScopedVariableExcludes */;
-            if (flags & 4 /* Property */)
-                result |= 0 /* PropertyExcludes */;
-            if (flags & 8 /* EnumMember */)
-                result |= 900095 /* EnumMemberExcludes */;
-            if (flags & 16 /* Function */)
-                result |= 106927 /* FunctionExcludes */;
-            if (flags & 32 /* Class */)
-                result |= 899519 /* ClassExcludes */;
-            if (flags & 64 /* Interface */)
-                result |= 792968 /* InterfaceExcludes */;
-            if (flags & 256 /* RegularEnum */)
-                result |= 899327 /* RegularEnumExcludes */;
-            if (flags & 128 /* ConstEnum */)
-                result |= 899967 /* ConstEnumExcludes */;
-            if (flags & 512 /* ValueModule */)
-                result |= 106639 /* ValueModuleExcludes */;
-            if (flags & 8192 /* Method */)
-                result |= 99263 /* MethodExcludes */;
-            if (flags & 32768 /* GetAccessor */)
-                result |= 41919 /* GetAccessorExcludes */;
-            if (flags & 65536 /* SetAccessor */)
-                result |= 74687 /* SetAccessorExcludes */;
-            if (flags & 262144 /* TypeParameter */)
-                result |= 530920 /* TypeParameterExcludes */;
-            if (flags & 524288 /* TypeAlias */)
-                result |= 793064 /* TypeAliasExcludes */;
-            if (flags & 8388608 /* Alias */)
-                result |= 8388608 /* AliasExcludes */;
-            return result;
-        }
-        function recordMergedSymbol(target, source) {
-            if (!source.mergeId) {
-                source.mergeId = nextMergeId;
-                nextMergeId++;
+         * Get type from type-reference that reference to class or interface
+         */
+        function getTypeFromClassOrInterfaceReference(node, symbol, typeArgs) {
+            var type = getDeclaredTypeOfSymbol(getMergedSymbol(symbol));
+            var typeParameters = type.localTypeParameters;
+            if (typeParameters) {
+                var numTypeArguments = ts.length(node.typeArguments);
+                var minTypeArgumentCount = getMinTypeArgumentCount(typeParameters);
+                if (!ts.isInJavaScriptFile(node) && (numTypeArguments < minTypeArgumentCount || numTypeArguments > typeParameters.length)) {
+                    error(node, minTypeArgumentCount === typeParameters.length
+                        ? ts.Diagnostics.Generic_type_0_requires_1_type_argument_s
+                        : ts.Diagnostics.Generic_type_0_requires_between_1_and_2_type_arguments, typeToString(type, /*enclosingDeclaration*/ undefined, 1 /* WriteArrayAsGenericType */), minTypeArgumentCount, typeParameters.length);
+                    return unknownType;
+                }
+                // In a type reference, the outer type parameters of the referenced class or interface are automatically
+                // supplied as type arguments and the type reference only specifies arguments for the local type parameters
+                // of the class or interface.
+                var typeArguments = ts.concatenate(type.outerTypeParameters, fillMissingTypeArguments(typeArgs, typeParameters, minTypeArgumentCount, node));
+                return createTypeReference(type, typeArguments);
             }
-            mergedSymbols[source.mergeId] = target;
+            if (node.typeArguments) {
+                error(node, ts.Diagnostics.Type_0_is_not_generic, typeToString(type));
+                return unknownType;
+            }
+            return type;
         }
-        function cloneSymbol(symbol) {
-            var result = createSymbol(symbol.flags | 33554432 /* Merged */, symbol.name);
-            result.declarations = symbol.declarations.slice(0);
-            result.parent = symbol.parent;
-            if (symbol.valueDeclaration)
-                result.valueDeclaration = symbol.valueDeclaration;
-            if (symbol.constEnumOnlyModule)
-                result.constEnumOnlyModule = true;
-            if (symbol.members)
-                result.members = ts.cloneMap(symbol.members);
-            if (symbol.exports)
-                result.exports = ts.cloneMap(symbol.exports);
-            recordMergedSymbol(result, symbol);
-            return result;
+        function getTypeAliasInstantiation(symbol, typeArguments) {
+            var type = getDeclaredTypeOfSymbol(symbol);
+            var links = getSymbolLinks(symbol);
+            var typeParameters = links.typeParameters;
+            var id = getTypeListId(typeArguments);
+            var instantiation = links.instantiations.get(id);
+            if (!instantiation) {
+                links.instantiations.set(id, instantiation = instantiateTypeNoAlias(type, createTypeMapper(typeParameters, fillMissingTypeArguments(typeArguments, typeParameters, getMinTypeArgumentCount(typeParameters)))));
+            }
+            return instantiation;
         }
-        function mergeSymbol(target, source) {
-            if (!(target.flags & getExcludedSymbolFlags(source.flags))) {
-                if (source.flags & 512 /* ValueModule */ && target.flags & 512 /* ValueModule */ && target.constEnumOnlyModule && !source.constEnumOnlyModule) {
-                    // reset flag when merging instantiated module into value module that has only const enums
-                    target.constEnumOnlyModule = false;
-                }
-                target.flags |= source.flags;
-                if (source.valueDeclaration &&
-                    (!target.valueDeclaration ||
-                        (target.valueDeclaration.kind === 225 /* ModuleDeclaration */ && source.valueDeclaration.kind !== 225 /* ModuleDeclaration */))) {
-                    // other kinds of value declarations take precedence over modules
-                    target.valueDeclaration = source.valueDeclaration;
-                }
-                ts.forEach(source.declarations, function (node) {
-                    target.declarations.push(node);
-                });
-                if (source.members) {
-                    if (!target.members)
-                        target.members = ts.createMap();
-                    mergeSymbolTable(target.members, source.members);
-                }
-                if (source.exports) {
-                    if (!target.exports)
-                        target.exports = ts.createMap();
-                    mergeSymbolTable(target.exports, source.exports);
+        /**
+         * Get type from reference to type alias. When a type alias is generic, the declared type of the type alias may include
+         * references to the type parameters of the alias. We replace those with the actual type arguments by instantiating the
+         * declared type. Instantiations are cached using the type identities of the type arguments as the key.
+         */
+        function getTypeFromTypeAliasReference(node, symbol, typeArguments) {
+            var type = getDeclaredTypeOfSymbol(symbol);
+            var typeParameters = getSymbolLinks(symbol).typeParameters;
+            if (typeParameters) {
+                var numTypeArguments = ts.length(node.typeArguments);
+                var minTypeArgumentCount = getMinTypeArgumentCount(typeParameters);
+                if (numTypeArguments < minTypeArgumentCount || numTypeArguments > typeParameters.length) {
+                    error(node, minTypeArgumentCount === typeParameters.length
+                        ? ts.Diagnostics.Generic_type_0_requires_1_type_argument_s
+                        : ts.Diagnostics.Generic_type_0_requires_between_1_and_2_type_arguments, symbolToString(symbol), minTypeArgumentCount, typeParameters.length);
+                    return unknownType;
                 }
-                recordMergedSymbol(target, source);
+                return getTypeAliasInstantiation(symbol, typeArguments);
             }
-            else {
-                var message_2 = target.flags & 2 /* BlockScopedVariable */ || source.flags & 2 /* BlockScopedVariable */
-                    ? ts.Diagnostics.Cannot_redeclare_block_scoped_variable_0 : ts.Diagnostics.Duplicate_identifier_0;
-                ts.forEach(source.declarations, function (node) {
-                    error(node.name ? node.name : node, message_2, symbolToString(source));
-                });
-                ts.forEach(target.declarations, function (node) {
-                    error(node.name ? node.name : node, message_2, symbolToString(source));
-                });
+            if (node.typeArguments) {
+                error(node, ts.Diagnostics.Type_0_is_not_generic, symbolToString(symbol));
+                return unknownType;
+            }
+            return type;
+        }
+        /**
+         * Get type from reference to named type that cannot be generic (enum or type parameter)
+         */
+        function getTypeFromNonGenericTypeReference(node, symbol) {
+            if (node.typeArguments) {
+                error(node, ts.Diagnostics.Type_0_is_not_generic, symbolToString(symbol));
+                return unknownType;
+            }
+            return getDeclaredTypeOfSymbol(symbol);
+        }
+        function getTypeReferenceName(node) {
+            switch (node.kind) {
+                case 159 /* TypeReference */:
+                    return node.typeName;
+                case 277 /* JSDocTypeReference */:
+                    return node.name;
+                case 201 /* ExpressionWithTypeArguments */:
+                    // We only support expressions that are simple qualified names. For other
+                    // expressions this produces undefined.
+                    var expr = node.expression;
+                    if (ts.isEntityNameExpression(expr)) {
+                        return expr;
+                    }
             }
+            return undefined;
         }
-        function mergeSymbolTable(target, source) {
-            for (var id in source) {
-                var targetSymbol = target[id];
-                if (!targetSymbol) {
-                    target[id] = source[id];
-                }
-                else {
-                    if (!(targetSymbol.flags & 33554432 /* Merged */)) {
-                        target[id] = targetSymbol = cloneSymbol(targetSymbol);
-                    }
-                    mergeSymbol(targetSymbol, source[id]);
-                }
+        function resolveTypeReferenceName(typeReferenceName, meaning) {
+            if (!typeReferenceName) {
+                return unknownSymbol;
             }
+            return resolveEntityName(typeReferenceName, meaning) || unknownSymbol;
         }
-        function mergeModuleAugmentation(moduleName) {
-            var moduleAugmentation = moduleName.parent;
-            if (moduleAugmentation.symbol.declarations[0] !== moduleAugmentation) {
-                // this is a combined symbol for multiple augmentations within the same file.
-                // its symbol already has accumulated information for all declarations
-                // so we need to add it just once - do the work only for first declaration
-                ts.Debug.assert(moduleAugmentation.symbol.declarations.length > 1);
-                return;
+        function getTypeReferenceType(node, symbol) {
+            var typeArguments = typeArgumentsFromTypeReferenceNode(node); // Do unconditionally so we mark type arguments as referenced.
+            if (symbol === unknownSymbol) {
+                return unknownType;
             }
-            if (ts.isGlobalScopeAugmentation(moduleAugmentation)) {
-                mergeSymbolTable(globals, moduleAugmentation.symbol.exports);
+            var type = getTypeReferenceTypeWorker(node, symbol, typeArguments);
+            if (type) {
+                return type;
             }
-            else {
-                // find a module that about to be augmented
-                // do not validate names of augmentations that are defined in ambient context
-                var moduleNotFoundError = !ts.isInAmbientContext(moduleName.parent.parent)
-                    ? ts.Diagnostics.Invalid_module_name_in_augmentation_module_0_cannot_be_found
-                    : undefined;
-                var mainModule = resolveExternalModuleNameWorker(moduleName, moduleName, moduleNotFoundError);
-                if (!mainModule) {
-                    return;
-                }
-                // obtain item referenced by 'export='
-                mainModule = resolveExternalModuleSymbol(mainModule);
-                if (mainModule.flags & 1920 /* Namespace */) {
-                    // if module symbol has already been merged - it is safe to use it.
-                    // otherwise clone it
-                    mainModule = mainModule.flags & 33554432 /* Merged */ ? mainModule : cloneSymbol(mainModule);
-                    mergeSymbol(mainModule, moduleAugmentation.symbol);
+            if (symbol.flags & 107455 /* Value */ && node.kind === 277 /* JSDocTypeReference */) {
+                // A JSDocTypeReference may have resolved to a value (as opposed to a type). If
+                // the symbol is a constructor function, return the inferred class type; otherwise,
+                // the type of this reference is just the type of the value we resolved to.
+                var valueType = getTypeOfSymbol(symbol);
+                if (valueType.symbol && !isInferredClassType(valueType)) {
+                    var referenceType = getTypeReferenceTypeWorker(node, valueType.symbol, typeArguments);
+                    if (referenceType) {
+                        return referenceType;
+                    }
                 }
-                else {
-                    error(moduleName, ts.Diagnostics.Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity, moduleName.text);
+                // Resolve the type reference as a Type for the purpose of reporting errors.
+                resolveTypeReferenceName(getTypeReferenceName(node), 793064 /* Type */);
+                return valueType;
+            }
+            return getTypeFromNonGenericTypeReference(node, symbol);
+        }
+        function getTypeReferenceTypeWorker(node, symbol, typeArguments) {
+            if (symbol.flags & (32 /* Class */ | 64 /* Interface */)) {
+                return getTypeFromClassOrInterfaceReference(node, symbol, typeArguments);
+            }
+            if (symbol.flags & 524288 /* TypeAlias */) {
+                return getTypeFromTypeAliasReference(node, symbol, typeArguments);
+            }
+            if (symbol.flags & 16 /* Function */ && node.kind === 277 /* JSDocTypeReference */ && (symbol.members || ts.getJSDocClassTag(symbol.valueDeclaration))) {
+                return getInferredClassType(symbol);
+            }
+        }
+        function getPrimitiveTypeFromJSDocTypeReference(node) {
+            if (ts.isIdentifier(node.name)) {
+                switch (node.name.text) {
+                    case "String":
+                        return stringType;
+                    case "Number":
+                        return numberType;
+                    case "Boolean":
+                        return booleanType;
+                    case "Void":
+                        return voidType;
+                    case "Undefined":
+                        return undefinedType;
+                    case "Null":
+                        return nullType;
+                    case "Object":
+                        return anyType;
+                    case "Function":
+                    case "function":
+                        return globalFunctionType;
+                    case "Array":
+                    case "array":
+                        return !node.typeArguments || !node.typeArguments.length ? createArrayType(anyType) : undefined;
+                    case "Promise":
+                    case "promise":
+                        return !node.typeArguments || !node.typeArguments.length ? createPromiseType(anyType) : undefined;
                 }
             }
         }
-        function addToSymbolTable(target, source, message) {
-            for (var id in source) {
-                if (target[id]) {
-                    // Error on redeclarations
-                    ts.forEach(target[id].declarations, addDeclarationDiagnostic(id, message));
+        function getTypeFromJSDocNullableTypeNode(node) {
+            var type = getTypeFromTypeNode(node.type);
+            return strictNullChecks ? getUnionType([type, nullType]) : type;
+        }
+        function getTypeFromTypeReference(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                var symbol = void 0;
+                var type = void 0;
+                var meaning = 793064 /* Type */;
+                if (node.kind === 277 /* JSDocTypeReference */) {
+                    type = getPrimitiveTypeFromJSDocTypeReference(node);
+                    meaning |= 107455 /* Value */;
                 }
-                else {
-                    target[id] = source[id];
+                if (!type) {
+                    symbol = resolveTypeReferenceName(getTypeReferenceName(node), meaning);
+                    type = getTypeReferenceType(node, symbol);
                 }
+                // Cache both the resolved symbol and the resolved type. The resolved symbol is needed in when we check the
+                // type reference in checkTypeReferenceOrExpressionWithTypeArguments.
+                links.resolvedSymbol = symbol;
+                links.resolvedType = type;
             }
-            function addDeclarationDiagnostic(id, message) {
-                return function (declaration) { return diagnostics.add(ts.createDiagnosticForNode(declaration, message, id)); };
-            }
-        }
-        function getSymbolLinks(symbol) {
-            if (symbol.flags & 67108864 /* Transient */)
-                return symbol;
-            var id = getSymbolId(symbol);
-            return symbolLinks[id] || (symbolLinks[id] = {});
+            return links.resolvedType;
         }
-        function getNodeLinks(node) {
-            var nodeId = getNodeId(node);
-            return nodeLinks[nodeId] || (nodeLinks[nodeId] = { flags: 0 });
+        function typeArgumentsFromTypeReferenceNode(node) {
+            return ts.map(node.typeArguments, getTypeFromTypeNode);
         }
-        function isGlobalSourceFile(node) {
-            return node.kind === 256 /* SourceFile */ && !ts.isExternalOrCommonJsModule(node);
+        function getTypeFromTypeQueryNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                // TypeScript 1.0 spec (April 2014): 3.6.3
+                // The expression is processed as an identifier expression (section 4.3)
+                // or property access expression(section 4.10),
+                // the widened type(section 3.9) of which becomes the result.
+                links.resolvedType = getWidenedType(checkExpression(node.exprName));
+            }
+            return links.resolvedType;
         }
-        function getSymbol(symbols, name, meaning) {
-            if (meaning) {
-                var symbol = symbols[name];
-                if (symbol) {
-                    ts.Debug.assert((symbol.flags & 16777216 /* Instantiated */) === 0, "Should never get an instantiated symbol here.");
-                    if (symbol.flags & meaning) {
-                        return symbol;
-                    }
-                    if (symbol.flags & 8388608 /* Alias */) {
-                        var target = resolveAlias(symbol);
-                        // Unknown symbol means an error occurred in alias resolution, treat it as positive answer to avoid cascading errors
-                        if (target === unknownSymbol || target.flags & meaning) {
-                            return symbol;
-                        }
+        function getTypeOfGlobalSymbol(symbol, arity) {
+            function getTypeDeclaration(symbol) {
+                var declarations = symbol.declarations;
+                for (var _i = 0, declarations_4 = declarations; _i < declarations_4.length; _i++) {
+                    var declaration = declarations_4[_i];
+                    switch (declaration.kind) {
+                        case 229 /* ClassDeclaration */:
+                        case 230 /* InterfaceDeclaration */:
+                        case 232 /* EnumDeclaration */:
+                            return declaration;
                     }
                 }
             }
-            // return undefined if we can't find a symbol.
+            if (!symbol) {
+                return arity ? emptyGenericType : emptyObjectType;
+            }
+            var type = getDeclaredTypeOfSymbol(symbol);
+            if (!(type.flags & 32768 /* Object */)) {
+                error(getTypeDeclaration(symbol), ts.Diagnostics.Global_type_0_must_be_a_class_or_interface_type, symbol.name);
+                return arity ? emptyGenericType : emptyObjectType;
+            }
+            if (ts.length(type.typeParameters) !== arity) {
+                error(getTypeDeclaration(symbol), ts.Diagnostics.Global_type_0_must_have_1_type_parameter_s, symbol.name, arity);
+                return arity ? emptyGenericType : emptyObjectType;
+            }
+            return type;
+        }
+        function getGlobalValueSymbol(name, reportErrors) {
+            return getGlobalSymbol(name, 107455 /* Value */, reportErrors ? ts.Diagnostics.Cannot_find_global_value_0 : undefined);
+        }
+        function getGlobalTypeSymbol(name, reportErrors) {
+            return getGlobalSymbol(name, 793064 /* Type */, reportErrors ? ts.Diagnostics.Cannot_find_global_type_0 : undefined);
+        }
+        function getGlobalSymbol(name, meaning, diagnostic) {
+            return resolveName(undefined, name, meaning, diagnostic, name);
+        }
+        function getGlobalType(name, arity, reportErrors) {
+            var symbol = getGlobalTypeSymbol(name, reportErrors);
+            return symbol || reportErrors ? getTypeOfGlobalSymbol(symbol, arity) : undefined;
+        }
+        function getGlobalTypedPropertyDescriptorType() {
+            return deferredGlobalTypedPropertyDescriptorType || (deferredGlobalTypedPropertyDescriptorType = getGlobalType("TypedPropertyDescriptor", /*arity*/ 1, /*reportErrors*/ true)) || emptyGenericType;
+        }
+        function getGlobalTemplateStringsArrayType() {
+            return deferredGlobalTemplateStringsArrayType || (deferredGlobalTemplateStringsArrayType = getGlobalType("TemplateStringsArray", /*arity*/ 0, /*reportErrors*/ true)) || emptyObjectType;
+        }
+        function getGlobalESSymbolConstructorSymbol(reportErrors) {
+            return deferredGlobalESSymbolConstructorSymbol || (deferredGlobalESSymbolConstructorSymbol = getGlobalValueSymbol("Symbol", reportErrors));
+        }
+        function getGlobalESSymbolType(reportErrors) {
+            return deferredGlobalESSymbolType || (deferredGlobalESSymbolType = getGlobalType("Symbol", /*arity*/ 0, reportErrors)) || emptyObjectType;
+        }
+        function getGlobalPromiseType(reportErrors) {
+            return deferredGlobalPromiseType || (deferredGlobalPromiseType = getGlobalType("Promise", /*arity*/ 1, reportErrors)) || emptyGenericType;
+        }
+        function getGlobalPromiseConstructorSymbol(reportErrors) {
+            return deferredGlobalPromiseConstructorSymbol || (deferredGlobalPromiseConstructorSymbol = getGlobalValueSymbol("Promise", reportErrors));
+        }
+        function getGlobalPromiseConstructorLikeType(reportErrors) {
+            return deferredGlobalPromiseConstructorLikeType || (deferredGlobalPromiseConstructorLikeType = getGlobalType("PromiseConstructorLike", /*arity*/ 0, reportErrors)) || emptyObjectType;
+        }
+        function getGlobalAsyncIterableType(reportErrors) {
+            return deferredGlobalAsyncIterableType || (deferredGlobalAsyncIterableType = getGlobalType("AsyncIterable", /*arity*/ 1, reportErrors)) || emptyGenericType;
+        }
+        function getGlobalAsyncIteratorType(reportErrors) {
+            return deferredGlobalAsyncIteratorType || (deferredGlobalAsyncIteratorType = getGlobalType("AsyncIterator", /*arity*/ 1, reportErrors)) || emptyGenericType;
+        }
+        function getGlobalAsyncIterableIteratorType(reportErrors) {
+            return deferredGlobalAsyncIterableIteratorType || (deferredGlobalAsyncIterableIteratorType = getGlobalType("AsyncIterableIterator", /*arity*/ 1, reportErrors)) || emptyGenericType;
+        }
+        function getGlobalIterableType(reportErrors) {
+            return deferredGlobalIterableType || (deferredGlobalIterableType = getGlobalType("Iterable", /*arity*/ 1, reportErrors)) || emptyGenericType;
+        }
+        function getGlobalIteratorType(reportErrors) {
+            return deferredGlobalIteratorType || (deferredGlobalIteratorType = getGlobalType("Iterator", /*arity*/ 1, reportErrors)) || emptyGenericType;
+        }
+        function getGlobalIterableIteratorType(reportErrors) {
+            return deferredGlobalIterableIteratorType || (deferredGlobalIterableIteratorType = getGlobalType("IterableIterator", /*arity*/ 1, reportErrors)) || emptyGenericType;
+        }
+        function getGlobalTypeOrUndefined(name, arity) {
+            if (arity === void 0) { arity = 0; }
+            var symbol = getGlobalSymbol(name, 793064 /* Type */, /*diagnostic*/ undefined);
+            return symbol && getTypeOfGlobalSymbol(symbol, arity);
         }
         /**
-         * Get symbols that represent parameter-property-declaration as parameter and as property declaration
-         * @param parameter a parameterDeclaration node
-         * @param parameterName a name of the parameter to get the symbols for.
-         * @return a tuple of two symbols
+         * Returns a type that is inside a namespace at the global scope, e.g.
+         * getExportedTypeFromNamespace('JSX', 'Element') returns the JSX.Element type
          */
-        function getSymbolsOfParameterPropertyDeclaration(parameter, parameterName) {
-            var constructorDeclaration = parameter.parent;
-            var classDeclaration = parameter.parent.parent;
-            var parameterSymbol = getSymbol(constructorDeclaration.locals, parameterName, 107455 /* Value */);
-            var propertySymbol = getSymbol(classDeclaration.symbol.members, parameterName, 107455 /* Value */);
-            if (parameterSymbol && propertySymbol) {
-                return [parameterSymbol, propertySymbol];
+        function getExportedTypeFromNamespace(namespace, name) {
+            var namespaceSymbol = getGlobalSymbol(namespace, 1920 /* Namespace */, /*diagnosticMessage*/ undefined);
+            var typeSymbol = namespaceSymbol && getSymbol(namespaceSymbol.exports, name, 793064 /* Type */);
+            return typeSymbol && getDeclaredTypeOfSymbol(typeSymbol);
+        }
+        /**
+         * Instantiates a global type that is generic with some element type, and returns that instantiation.
+         */
+        function createTypeFromGenericGlobalType(genericGlobalType, typeArguments) {
+            return genericGlobalType !== emptyGenericType ? createTypeReference(genericGlobalType, typeArguments) : emptyObjectType;
+        }
+        function createTypedPropertyDescriptorType(propertyType) {
+            return createTypeFromGenericGlobalType(getGlobalTypedPropertyDescriptorType(), [propertyType]);
+        }
+        function createAsyncIterableType(iteratedType) {
+            return createTypeFromGenericGlobalType(getGlobalAsyncIterableType(/*reportErrors*/ true), [iteratedType]);
+        }
+        function createAsyncIterableIteratorType(iteratedType) {
+            return createTypeFromGenericGlobalType(getGlobalAsyncIterableIteratorType(/*reportErrors*/ true), [iteratedType]);
+        }
+        function createIterableType(iteratedType) {
+            return createTypeFromGenericGlobalType(getGlobalIterableType(/*reportErrors*/ true), [iteratedType]);
+        }
+        function createIterableIteratorType(iteratedType) {
+            return createTypeFromGenericGlobalType(getGlobalIterableIteratorType(/*reportErrors*/ true), [iteratedType]);
+        }
+        function createArrayType(elementType) {
+            return createTypeFromGenericGlobalType(globalArrayType, [elementType]);
+        }
+        function getTypeFromArrayTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = createArrayType(getTypeFromTypeNode(node.elementType));
             }
-            ts.Debug.fail("There should exist two symbols, one as property declaration and one as parameter declaration");
+            return links.resolvedType;
         }
-        function isBlockScopedNameDeclaredBeforeUse(declaration, usage) {
-            var declarationFile = ts.getSourceFileOfNode(declaration);
-            var useFile = ts.getSourceFileOfNode(usage);
-            if (declarationFile !== useFile) {
-                if ((modulekind && (declarationFile.externalModuleIndicator || useFile.externalModuleIndicator)) ||
-                    (!compilerOptions.outFile && !compilerOptions.out)) {
-                    // nodes are in different files and order cannot be determines
-                    return true;
-                }
-                var sourceFiles = host.getSourceFiles();
-                return ts.indexOf(sourceFiles, declarationFile) <= ts.indexOf(sourceFiles, useFile);
+        // We represent tuple types as type references to synthesized generic interface types created by
+        // this function. The types are of the form:
+        //
+        //   interface Tuple<T0, T1, T2, ...> extends Array<T0 | T1 | T2 | ...> { 0: T0, 1: T1, 2: T2, ... }
+        //
+        // Note that the generic type created by this function has no symbol associated with it. The same
+        // is true for each of the synthesized type parameters.
+        function createTupleTypeOfArity(arity) {
+            var typeParameters = [];
+            var properties = [];
+            for (var i = 0; i < arity; i++) {
+                var typeParameter = createType(16384 /* TypeParameter */);
+                typeParameters.push(typeParameter);
+                var property = createSymbol(4 /* Property */, "" + i);
+                property.type = typeParameter;
+                properties.push(property);
             }
-            if (declaration.pos <= usage.pos) {
-                // declaration is before usage
-                // still might be illegal if usage is in the initializer of the variable declaration
-                return declaration.kind !== 218 /* VariableDeclaration */ ||
-                    !isImmediatelyUsedInInitializerOfBlockScopedVariable(declaration, usage);
+            var type = createObjectType(8 /* Tuple */ | 4 /* Reference */);
+            type.typeParameters = typeParameters;
+            type.outerTypeParameters = undefined;
+            type.localTypeParameters = typeParameters;
+            type.instantiations = ts.createMap();
+            type.instantiations.set(getTypeListId(type.typeParameters), type);
+            type.target = type;
+            type.typeArguments = type.typeParameters;
+            type.thisType = createType(16384 /* TypeParameter */);
+            type.thisType.isThisType = true;
+            type.thisType.constraint = type;
+            type.declaredProperties = properties;
+            type.declaredCallSignatures = emptyArray;
+            type.declaredConstructSignatures = emptyArray;
+            type.declaredStringIndexInfo = undefined;
+            type.declaredNumberIndexInfo = undefined;
+            return type;
+        }
+        function getTupleTypeOfArity(arity) {
+            return tupleTypes[arity] || (tupleTypes[arity] = createTupleTypeOfArity(arity));
+        }
+        function createTupleType(elementTypes) {
+            return createTypeReference(getTupleTypeOfArity(elementTypes.length), elementTypes);
+        }
+        function getTypeFromTupleTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = createTupleType(ts.map(node.elementTypes, getTypeFromTypeNode));
             }
-            // declaration is after usage
-            // can be legal if usage is deferred (i.e. inside function or in initializer of instance property)
-            return isUsedInFunctionOrNonStaticProperty(declaration, usage);
-            function isImmediatelyUsedInInitializerOfBlockScopedVariable(declaration, usage) {
-                var container = ts.getEnclosingBlockScopeContainer(declaration);
-                switch (declaration.parent.parent.kind) {
-                    case 200 /* VariableStatement */:
-                    case 206 /* ForStatement */:
-                    case 208 /* ForOfStatement */:
-                        // variable statement/for/for-of statement case,
-                        // use site should not be inside variable declaration (initializer of declaration or binding element)
-                        if (isSameScopeDescendentOf(usage, declaration, container)) {
-                            return true;
-                        }
-                        break;
+            return links.resolvedType;
+        }
+        function binarySearchTypes(types, type) {
+            var low = 0;
+            var high = types.length - 1;
+            var typeId = type.id;
+            while (low <= high) {
+                var middle = low + ((high - low) >> 1);
+                var id = types[middle].id;
+                if (id === typeId) {
+                    return middle;
                 }
-                switch (declaration.parent.parent.kind) {
-                    case 207 /* ForInStatement */:
-                    case 208 /* ForOfStatement */:
-                        // ForIn/ForOf case - use site should not be used in expression part
-                        if (isSameScopeDescendentOf(usage, declaration.parent.parent.expression, container)) {
-                            return true;
-                        }
+                else if (id > typeId) {
+                    high = middle - 1;
                 }
-                return false;
-            }
-            function isUsedInFunctionOrNonStaticProperty(declaration, usage) {
-                var container = ts.getEnclosingBlockScopeContainer(declaration);
-                var current = usage;
-                while (current) {
-                    if (current === container) {
-                        return false;
-                    }
-                    if (ts.isFunctionLike(current)) {
-                        return true;
-                    }
-                    var initializerOfNonStaticProperty = current.parent &&
-                        current.parent.kind === 145 /* PropertyDeclaration */ &&
-                        (ts.getModifierFlags(current.parent) & 32 /* Static */) === 0 &&
-                        current.parent.initializer === current;
-                    if (initializerOfNonStaticProperty) {
-                        return true;
-                    }
-                    current = current.parent;
+                else {
+                    low = middle + 1;
                 }
-                return false;
             }
+            return ~low;
         }
-        // Resolve a given name for a given meaning at a given location. An error is reported if the name was not found and
-        // the nameNotFoundMessage argument is not undefined. Returns the resolved symbol, or undefined if no symbol with
-        // the given name can be found.
-        function resolveName(location, name, meaning, nameNotFoundMessage, nameArg) {
-            var result;
-            var lastLocation;
-            var propertyWithInvalidInitializer;
-            var errorLocation = location;
-            var grandparent;
-            var isInExternalModule = false;
-            loop: while (location) {
-                // Locals of a source file are not in scope (because they get merged into the global symbol table)
-                if (location.locals && !isGlobalSourceFile(location)) {
-                    if (result = getSymbol(location.locals, name, meaning)) {
-                        var useResult = true;
-                        if (ts.isFunctionLike(location) && lastLocation && lastLocation !== location.body) {
-                            // symbol lookup restrictions for function-like declarations
-                            // - Type parameters of a function are in scope in the entire function declaration, including the parameter
-                            //   list and return type. However, local types are only in scope in the function body.
-                            // - parameters are only in the scope of function body
-                            // This restriction does not apply to JSDoc comment types because they are parented
-                            // at a higher level than type parameters would normally be
-                            if (meaning & result.flags & 793064 /* Type */ && lastLocation.kind !== 273 /* JSDocComment */) {
-                                useResult = result.flags & 262144 /* TypeParameter */
-                                    ? lastLocation === location.type ||
-                                        lastLocation.kind === 142 /* Parameter */ ||
-                                        lastLocation.kind === 141 /* TypeParameter */
-                                    : false;
-                            }
-                            if (meaning & 107455 /* Value */ && result.flags & 1 /* FunctionScopedVariable */) {
-                                // parameters are visible only inside function body, parameter list and return type
-                                // technically for parameter list case here we might mix parameters and variables declared in function,
-                                // however it is detected separately when checking initializers of parameters
-                                // to make sure that they reference no variables declared after them.
-                                useResult =
-                                    lastLocation.kind === 142 /* Parameter */ ||
-                                        (lastLocation === location.type &&
-                                            result.valueDeclaration.kind === 142 /* Parameter */);
-                            }
-                        }
-                        if (useResult) {
-                            break loop;
-                        }
-                        else {
-                            result = undefined;
-                        }
-                    }
-                }
-                switch (location.kind) {
-                    case 256 /* SourceFile */:
-                        if (!ts.isExternalOrCommonJsModule(location))
-                            break;
-                        isInExternalModule = true;
-                    case 225 /* ModuleDeclaration */:
-                        var moduleExports = getSymbolOfNode(location).exports;
-                        if (location.kind === 256 /* SourceFile */ || ts.isAmbientModule(location)) {
-                            // It's an external module. First see if the module has an export default and if the local
-                            // name of that export default matches.
-                            if (result = moduleExports["default"]) {
-                                var localSymbol = ts.getLocalSymbolForExportDefault(result);
-                                if (localSymbol && (result.flags & meaning) && localSymbol.name === name) {
-                                    break loop;
-                                }
-                                result = undefined;
-                            }
-                            // Because of module/namespace merging, a module's exports are in scope,
-                            // yet we never want to treat an export specifier as putting a member in scope.
-                            // Therefore, if the name we find is purely an export specifier, it is not actually considered in scope.
-                            // Two things to note about this:
-                            //     1. We have to check this without calling getSymbol. The problem with calling getSymbol
-                            //        on an export specifier is that it might find the export specifier itself, and try to
-                            //        resolve it as an alias. This will cause the checker to consider the export specifier
-                            //        a circular alias reference when it might not be.
-                            //     2. We check === SymbolFlags.Alias in order to check that the symbol is *purely*
-                            //        an alias. If we used &, we'd be throwing out symbols that have non alias aspects,
-                            //        which is not the desired behavior.
-                            if (moduleExports[name] &&
-                                moduleExports[name].flags === 8388608 /* Alias */ &&
-                                ts.getDeclarationOfKind(moduleExports[name], 238 /* ExportSpecifier */)) {
-                                break;
-                            }
-                        }
-                        if (result = getSymbol(moduleExports, name, meaning & 8914931 /* ModuleMember */)) {
-                            break loop;
-                        }
-                        break;
-                    case 224 /* EnumDeclaration */:
-                        if (result = getSymbol(getSymbolOfNode(location).exports, name, meaning & 8 /* EnumMember */)) {
-                            break loop;
-                        }
-                        break;
-                    case 145 /* PropertyDeclaration */:
-                    case 144 /* PropertySignature */:
-                        // TypeScript 1.0 spec (April 2014): 8.4.1
-                        // Initializer expressions for instance member variables are evaluated in the scope
-                        // of the class constructor body but are not permitted to reference parameters or
-                        // local variables of the constructor. This effectively means that entities from outer scopes
-                        // by the same name as a constructor parameter or local variable are inaccessible
-                        // in initializer expressions for instance member variables.
-                        if (ts.isClassLike(location.parent) && !(ts.getModifierFlags(location) & 32 /* Static */)) {
-                            var ctor = findConstructorDeclaration(location.parent);
-                            if (ctor && ctor.locals) {
-                                if (getSymbol(ctor.locals, name, meaning & 107455 /* Value */)) {
-                                    // Remember the property node, it will be used later to report appropriate error
-                                    propertyWithInvalidInitializer = location;
-                                }
-                            }
-                        }
-                        break;
-                    case 221 /* ClassDeclaration */:
-                    case 192 /* ClassExpression */:
-                    case 222 /* InterfaceDeclaration */:
-                        if (result = getSymbol(getSymbolOfNode(location).members, name, meaning & 793064 /* Type */)) {
-                            if (lastLocation && ts.getModifierFlags(lastLocation) & 32 /* Static */) {
-                                // TypeScript 1.0 spec (April 2014): 3.4.1
-                                // The scope of a type parameter extends over the entire declaration with which the type
-                                // parameter list is associated, with the exception of static member declarations in classes.
-                                error(errorLocation, ts.Diagnostics.Static_members_cannot_reference_class_type_parameters);
-                                return undefined;
-                            }
-                            break loop;
-                        }
-                        if (location.kind === 192 /* ClassExpression */ && meaning & 32 /* Class */) {
-                            var className = location.name;
-                            if (className && name === className.text) {
-                                result = location.symbol;
-                                break loop;
-                            }
-                        }
-                        break;
-                    // It is not legal to reference a class's own type parameters from a computed property name that
-                    // belongs to the class. For example:
-                    //
-                    //   function foo<T>() { return '' }
-                    //   class C<T> { // <-- Class's own type parameter T
-                    //       [foo<T>()]() { } // <-- Reference to T from class's own computed property
-                    //   }
-                    //
-                    case 140 /* ComputedPropertyName */:
-                        grandparent = location.parent.parent;
-                        if (ts.isClassLike(grandparent) || grandparent.kind === 222 /* InterfaceDeclaration */) {
-                            // A reference to this grandparent's type parameters would be an error
-                            if (result = getSymbol(getSymbolOfNode(grandparent).members, name, meaning & 793064 /* Type */)) {
-                                error(errorLocation, ts.Diagnostics.A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type);
-                                return undefined;
-                            }
-                        }
-                        break;
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                    case 148 /* Constructor */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                    case 220 /* FunctionDeclaration */:
-                    case 180 /* ArrowFunction */:
-                        if (meaning & 3 /* Variable */ && name === "arguments") {
-                            result = argumentsSymbol;
-                            break loop;
-                        }
-                        break;
-                    case 179 /* FunctionExpression */:
-                        if (meaning & 3 /* Variable */ && name === "arguments") {
-                            result = argumentsSymbol;
-                            break loop;
-                        }
-                        if (meaning & 16 /* Function */) {
-                            var functionName = location.name;
-                            if (functionName && name === functionName.text) {
-                                result = location.symbol;
-                                break loop;
-                            }
-                        }
-                        break;
-                    case 143 /* Decorator */:
-                        // Decorators are resolved at the class declaration. Resolving at the parameter
-                        // or member would result in looking up locals in the method.
-                        //
-                        //   function y() {}
-                        //   class C {
-                        //       method(@y x, y) {} // <-- decorator y should be resolved at the class declaration, not the parameter.
-                        //   }
-                        //
-                        if (location.parent && location.parent.kind === 142 /* Parameter */) {
-                            location = location.parent;
-                        }
-                        //
-                        //   function y() {}
-                        //   class C {
-                        //       @y method(x, y) {} // <-- decorator y should be resolved at the class declaration, not the method.
-                        //   }
-                        //
-                        if (location.parent && ts.isClassElement(location.parent)) {
-                            location = location.parent;
-                        }
-                        break;
-                }
-                lastLocation = location;
-                location = location.parent;
-            }
-            if (result && nameNotFoundMessage && noUnusedIdentifiers) {
-                result.isReferenced = true;
-            }
-            if (!result) {
-                result = getSymbol(globals, name, meaning);
-            }
-            if (!result) {
-                if (nameNotFoundMessage) {
-                    if (!errorLocation ||
-                        !checkAndReportErrorForMissingPrefix(errorLocation, name, nameArg) &&
-                            !checkAndReportErrorForExtendingInterface(errorLocation) &&
-                            !checkAndReportErrorForUsingTypeAsValue(errorLocation, name, meaning)) {
-                        error(errorLocation, nameNotFoundMessage, typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg));
-                    }
-                }
-                return undefined;
+        function containsType(types, type) {
+            return binarySearchTypes(types, type) >= 0;
+        }
+        function addTypeToUnion(typeSet, type) {
+            var flags = type.flags;
+            if (flags & 65536 /* Union */) {
+                addTypesToUnion(typeSet, type.types);
             }
-            // Perform extra checks only if error reporting was requested
-            if (nameNotFoundMessage) {
-                if (propertyWithInvalidInitializer) {
-                    // We have a match, but the reference occurred within a property initializer and the identifier also binds
-                    // to a local variable in the constructor where the code will be emitted.
-                    var propertyName = propertyWithInvalidInitializer.name;
-                    error(errorLocation, ts.Diagnostics.Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor, ts.declarationNameToString(propertyName), typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg));
-                    return undefined;
-                }
-                // Only check for block-scoped variable if we are looking for the
-                // name with variable meaning
-                //      For example,
-                //          declare module foo {
-                //              interface bar {}
-                //          }
-                //      const foo/*1*/: foo/*2*/.bar;
-                // The foo at /*1*/ and /*2*/ will share same symbol with two meaning
-                // block - scope variable and namespace module. However, only when we
-                // try to resolve name in /*1*/ which is used in variable position,
-                // we want to check for block- scoped
-                if (meaning & 2 /* BlockScopedVariable */) {
-                    var exportOrLocalSymbol = getExportSymbolOfValueSymbolIfExported(result);
-                    if (exportOrLocalSymbol.flags & 2 /* BlockScopedVariable */) {
-                        checkResolvedBlockScopedVariable(exportOrLocalSymbol, errorLocation);
-                    }
-                }
-                // If we're in an external module, we can't reference value symbols created from UMD export declarations
-                if (result && isInExternalModule && (meaning & 107455 /* Value */) === 107455 /* Value */) {
-                    var decls = result.declarations;
-                    if (decls && decls.length === 1 && decls[0].kind === 228 /* NamespaceExportDeclaration */) {
-                        error(errorLocation, ts.Diagnostics.Identifier_0_must_be_imported_from_a_module, name);
-                    }
-                }
+            else if (flags & 1 /* Any */) {
+                typeSet.containsAny = true;
             }
-            return result;
-        }
-        function checkAndReportErrorForMissingPrefix(errorLocation, name, nameArg) {
-            if ((errorLocation.kind === 69 /* Identifier */ && (isTypeReferenceIdentifier(errorLocation)) || isInTypeQuery(errorLocation))) {
-                return false;
+            else if (!strictNullChecks && flags & 6144 /* Nullable */) {
+                if (flags & 2048 /* Undefined */)
+                    typeSet.containsUndefined = true;
+                if (flags & 4096 /* Null */)
+                    typeSet.containsNull = true;
+                if (!(flags & 2097152 /* ContainsWideningType */))
+                    typeSet.containsNonWideningType = true;
             }
-            var container = ts.getThisContainer(errorLocation, /* includeArrowFunctions */ true);
-            var location = container;
-            while (location) {
-                if (ts.isClassLike(location.parent)) {
-                    var classSymbol = getSymbolOfNode(location.parent);
-                    if (!classSymbol) {
-                        break;
-                    }
-                    // Check to see if a static member exists.
-                    var constructorType = getTypeOfSymbol(classSymbol);
-                    if (getPropertyOfType(constructorType, name)) {
-                        error(errorLocation, ts.Diagnostics.Cannot_find_name_0_Did_you_mean_the_static_member_1_0, typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg), symbolToString(classSymbol));
-                        return true;
-                    }
-                    // No static member is present.
-                    // Check if we're in an instance method and look for a relevant instance member.
-                    if (location === container && !(ts.getModifierFlags(location) & 32 /* Static */)) {
-                        var instanceType = getDeclaredTypeOfSymbol(classSymbol).thisType;
-                        if (getPropertyOfType(instanceType, name)) {
-                            error(errorLocation, ts.Diagnostics.Cannot_find_name_0_Did_you_mean_the_instance_member_this_0, typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg));
-                            return true;
-                        }
+            else if (!(flags & 8192 /* Never */)) {
+                if (flags & 2 /* String */)
+                    typeSet.containsString = true;
+                if (flags & 4 /* Number */)
+                    typeSet.containsNumber = true;
+                if (flags & 96 /* StringOrNumberLiteral */)
+                    typeSet.containsStringOrNumberLiteral = true;
+                var len = typeSet.length;
+                var index = len && type.id > typeSet[len - 1].id ? ~len : binarySearchTypes(typeSet, type);
+                if (index < 0) {
+                    if (!(flags & 32768 /* Object */ && type.objectFlags & 16 /* Anonymous */ &&
+                        type.symbol && type.symbol.flags & (16 /* Function */ | 8192 /* Method */) && containsIdenticalType(typeSet, type))) {
+                        typeSet.splice(~index, 0, type);
                     }
                 }
-                location = location.parent;
             }
-            return false;
         }
-        function checkAndReportErrorForExtendingInterface(errorLocation) {
-            var expression = getEntityNameForExtendingInterface(errorLocation);
-            var isError = !!(expression && resolveEntityName(expression, 64 /* Interface */, /*ignoreErrors*/ true));
-            if (isError) {
-                error(errorLocation, ts.Diagnostics.Cannot_extend_an_interface_0_Did_you_mean_implements, ts.getTextOfNode(expression));
+        // Add the given types to the given type set. Order is preserved, duplicates are removed,
+        // and nested types of the given kind are flattened into the set.
+        function addTypesToUnion(typeSet, types) {
+            for (var _i = 0, types_5 = types; _i < types_5.length; _i++) {
+                var type = types_5[_i];
+                addTypeToUnion(typeSet, type);
             }
-            return isError;
         }
-        /**
-         * Climbs up parents to an ExpressionWithTypeArguments, and returns its expression,
-         * but returns undefined if that expression is not an EntityNameExpression.
-         */
-        function getEntityNameForExtendingInterface(node) {
-            switch (node.kind) {
-                case 69 /* Identifier */:
-                case 172 /* PropertyAccessExpression */:
-                    return node.parent ? getEntityNameForExtendingInterface(node.parent) : undefined;
-                case 194 /* ExpressionWithTypeArguments */:
-                    ts.Debug.assert(ts.isEntityNameExpression(node.expression));
-                    return node.expression;
-                default:
-                    return undefined;
+        function containsIdenticalType(types, type) {
+            for (var _i = 0, types_6 = types; _i < types_6.length; _i++) {
+                var t = types_6[_i];
+                if (isTypeIdenticalTo(t, type)) {
+                    return true;
+                }
             }
+            return false;
         }
-        function checkAndReportErrorForUsingTypeAsValue(errorLocation, name, meaning) {
-            if (meaning & (107455 /* Value */ & ~1024 /* NamespaceModule */)) {
-                var symbol = resolveSymbol(resolveName(errorLocation, name, 793064 /* Type */ & ~107455 /* Value */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined));
-                if (symbol && !(symbol.flags & 1024 /* NamespaceModule */)) {
-                    error(errorLocation, ts.Diagnostics._0_only_refers_to_a_type_but_is_being_used_as_a_value_here, name);
+        function isSubtypeOfAny(candidate, types) {
+            for (var _i = 0, types_7 = types; _i < types_7.length; _i++) {
+                var type = types_7[_i];
+                if (candidate !== type && isTypeSubtypeOf(candidate, type)) {
                     return true;
                 }
             }
             return false;
         }
-        function checkResolvedBlockScopedVariable(result, errorLocation) {
-            ts.Debug.assert((result.flags & 2 /* BlockScopedVariable */) !== 0);
-            // Block-scoped variables cannot be used before their definition
-            var declaration = ts.forEach(result.declarations, function (d) { return ts.isBlockOrCatchScoped(d) ? d : undefined; });
-            ts.Debug.assert(declaration !== undefined, "Block-scoped variable declaration is undefined");
-            if (!ts.isInAmbientContext(declaration) && !isBlockScopedNameDeclaredBeforeUse(ts.getAncestor(declaration, 218 /* VariableDeclaration */), errorLocation)) {
-                error(errorLocation, ts.Diagnostics.Block_scoped_variable_0_used_before_its_declaration, ts.declarationNameToString(declaration.name));
+        function isSetOfLiteralsFromSameEnum(types) {
+            var first = types[0];
+            if (first.flags & 256 /* EnumLiteral */) {
+                var firstEnum = getParentOfSymbol(first.symbol);
+                for (var i = 1; i < types.length; i++) {
+                    var other = types[i];
+                    if (!(other.flags & 256 /* EnumLiteral */) || (firstEnum !== getParentOfSymbol(other.symbol))) {
+                        return false;
+                    }
+                }
+                return true;
             }
+            return false;
         }
-        /* Starting from 'initial' node walk up the parent chain until 'stopAt' node is reached.
-         * If at any point current node is equal to 'parent' node - return true.
-         * Return false if 'stopAt' node is reached or isFunctionLike(current) === true.
-         */
-        function isSameScopeDescendentOf(initial, parent, stopAt) {
-            if (!parent) {
-                return false;
+        function removeSubtypes(types) {
+            if (types.length === 0 || isSetOfLiteralsFromSameEnum(types)) {
+                return;
             }
-            for (var current = initial; current && current !== stopAt && !ts.isFunctionLike(current); current = current.parent) {
-                if (current === parent) {
-                    return true;
+            var i = types.length;
+            while (i > 0) {
+                i--;
+                if (isSubtypeOfAny(types[i], types)) {
+                    ts.orderedRemoveItemAt(types, i);
                 }
             }
-            return false;
         }
-        function getAnyImportSyntax(node) {
-            if (ts.isAliasSymbolDeclaration(node)) {
-                if (node.kind === 229 /* ImportEqualsDeclaration */) {
-                    return node;
-                }
-                while (node && node.kind !== 230 /* ImportDeclaration */) {
-                    node = node.parent;
+        function removeRedundantLiteralTypes(types) {
+            var i = types.length;
+            while (i > 0) {
+                i--;
+                var t = types[i];
+                var remove = t.flags & 32 /* StringLiteral */ && types.containsString ||
+                    t.flags & 64 /* NumberLiteral */ && types.containsNumber ||
+                    t.flags & 96 /* StringOrNumberLiteral */ && t.flags & 1048576 /* FreshLiteral */ && containsType(types, t.regularType);
+                if (remove) {
+                    ts.orderedRemoveItemAt(types, i);
                 }
-                return node;
             }
         }
-        function getDeclarationOfAliasSymbol(symbol) {
-            return ts.forEach(symbol.declarations, function (d) { return ts.isAliasSymbolDeclaration(d) ? d : undefined; });
+        // We sort and deduplicate the constituent types based on object identity. If the subtypeReduction
+        // flag is specified we also reduce the constituent type set to only include types that aren't subtypes
+        // of other types. Subtype reduction is expensive for large union types and is possible only when union
+        // types are known not to circularly reference themselves (as is the case with union types created by
+        // expression constructs such as array literals and the || and ?: operators). Named types can
+        // circularly reference themselves and therefore cannot be subtype reduced during their declaration.
+        // For example, "type Item = string | (() => Item" is a named type that circularly references itself.
+        function getUnionType(types, subtypeReduction, aliasSymbol, aliasTypeArguments) {
+            if (types.length === 0) {
+                return neverType;
+            }
+            if (types.length === 1) {
+                return types[0];
+            }
+            var typeSet = [];
+            addTypesToUnion(typeSet, types);
+            if (typeSet.containsAny) {
+                return anyType;
+            }
+            if (subtypeReduction) {
+                removeSubtypes(typeSet);
+            }
+            else if (typeSet.containsStringOrNumberLiteral) {
+                removeRedundantLiteralTypes(typeSet);
+            }
+            if (typeSet.length === 0) {
+                return typeSet.containsNull ? typeSet.containsNonWideningType ? nullType : nullWideningType :
+                    typeSet.containsUndefined ? typeSet.containsNonWideningType ? undefinedType : undefinedWideningType :
+                        neverType;
+            }
+            return getUnionTypeFromSortedList(typeSet, aliasSymbol, aliasTypeArguments);
         }
-        function getTargetOfImportEqualsDeclaration(node) {
-            if (node.moduleReference.kind === 240 /* ExternalModuleReference */) {
-                return resolveExternalModuleSymbol(resolveExternalModuleName(node, ts.getExternalModuleImportEqualsDeclarationExpression(node)));
+        // This function assumes the constituent type list is sorted and deduplicated.
+        function getUnionTypeFromSortedList(types, aliasSymbol, aliasTypeArguments) {
+            if (types.length === 0) {
+                return neverType;
+            }
+            if (types.length === 1) {
+                return types[0];
+            }
+            var id = getTypeListId(types);
+            var type = unionTypes.get(id);
+            if (!type) {
+                var propagatedFlags = getPropagatingFlagsOfTypes(types, /*excludeKinds*/ 6144 /* Nullable */);
+                type = createType(65536 /* Union */ | propagatedFlags);
+                unionTypes.set(id, type);
+                type.types = types;
+                type.aliasSymbol = aliasSymbol;
+                type.aliasTypeArguments = aliasTypeArguments;
             }
-            return getSymbolOfPartOfRightHandSideOfImportEquals(node.moduleReference, node);
+            return type;
         }
-        function getTargetOfImportClause(node) {
-            var moduleSymbol = resolveExternalModuleName(node, node.parent.moduleSpecifier);
-            if (moduleSymbol) {
-                var exportDefaultSymbol = ts.isShorthandAmbientModuleSymbol(moduleSymbol) ?
-                    moduleSymbol :
-                    moduleSymbol.exports["export="] ?
-                        getPropertyOfType(getTypeOfSymbol(moduleSymbol.exports["export="]), "default") :
-                        resolveSymbol(moduleSymbol.exports["default"]);
-                if (!exportDefaultSymbol && !allowSyntheticDefaultImports) {
-                    error(node.name, ts.Diagnostics.Module_0_has_no_default_export, symbolToString(moduleSymbol));
+        function getTypeFromUnionTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = getUnionType(ts.map(node.types, getTypeFromTypeNode), /*subtypeReduction*/ false, getAliasSymbolForTypeNode(node), getAliasTypeArgumentsForTypeNode(node));
+            }
+            return links.resolvedType;
+        }
+        function addTypeToIntersection(typeSet, type) {
+            if (type.flags & 131072 /* Intersection */) {
+                addTypesToIntersection(typeSet, type.types);
+            }
+            else if (type.flags & 1 /* Any */) {
+                typeSet.containsAny = true;
+            }
+            else if (type.flags & 8192 /* Never */) {
+                typeSet.containsNever = true;
+            }
+            else if (getObjectFlags(type) & 16 /* Anonymous */ && isEmptyObjectType(type)) {
+                typeSet.containsEmptyObject = true;
+            }
+            else if ((strictNullChecks || !(type.flags & 6144 /* Nullable */)) && !ts.contains(typeSet, type)) {
+                if (type.flags & 32768 /* Object */) {
+                    typeSet.containsObjectType = true;
                 }
-                else if (!exportDefaultSymbol && allowSyntheticDefaultImports) {
-                    return resolveExternalModuleSymbol(moduleSymbol) || resolveSymbol(moduleSymbol);
+                if (type.flags & 65536 /* Union */ && typeSet.unionIndex === undefined) {
+                    typeSet.unionIndex = typeSet.length;
+                }
+                if (!(type.flags & 32768 /* Object */ && type.objectFlags & 16 /* Anonymous */ &&
+                    type.symbol && type.symbol.flags & (16 /* Function */ | 8192 /* Method */) && containsIdenticalType(typeSet, type))) {
+                    typeSet.push(type);
                 }
-                return exportDefaultSymbol;
             }
         }
-        function getTargetOfNamespaceImport(node) {
-            var moduleSpecifier = node.parent.parent.moduleSpecifier;
-            return resolveESModuleSymbol(resolveExternalModuleName(node, moduleSpecifier), moduleSpecifier);
+        // Add the given types to the given type set. Order is preserved, duplicates are removed,
+        // and nested types of the given kind are flattened into the set.
+        function addTypesToIntersection(typeSet, types) {
+            for (var _i = 0, types_8 = types; _i < types_8.length; _i++) {
+                var type = types_8[_i];
+                addTypeToIntersection(typeSet, type);
+            }
         }
-        // This function creates a synthetic symbol that combines the value side of one symbol with the
-        // type/namespace side of another symbol. Consider this example:
-        //
-        //   declare module graphics {
-        //       interface Point {
-        //           x: number;
-        //           y: number;
-        //       }
-        //   }
-        //   declare var graphics: {
-        //       Point: new (x: number, y: number) => graphics.Point;
-        //   }
-        //   declare module "graphics" {
-        //       export = graphics;
-        //   }
+        // We normalize combinations of intersection and union types based on the distributive property of the '&'
+        // operator. Specifically, because X & (A | B) is equivalent to X & A | X & B, we can transform intersection
+        // types with union type constituents into equivalent union types with intersection type constituents and
+        // effectively ensure that union types are always at the top level in type representations.
         //
-        // An 'import { Point } from "graphics"' needs to create a symbol that combines the value side 'Point'
-        // property with the type/namespace side interface 'Point'.
-        function combineValueAndTypeSymbols(valueSymbol, typeSymbol) {
-            if (valueSymbol.flags & (793064 /* Type */ | 1920 /* Namespace */)) {
-                return valueSymbol;
+        // We do not perform structural deduplication on intersection types. Intersection types are created only by the &
+        // type operator and we can't reduce those because we want to support recursive intersection types. For example,
+        // a type alias of the form "type List<T> = T & { next: List<T> }" cannot be reduced during its declaration.
+        // Also, unlike union types, the order of the constituent types is preserved in order that overload resolution
+        // for intersections of types with signatures can be deterministic.
+        function getIntersectionType(types, aliasSymbol, aliasTypeArguments) {
+            if (types.length === 0) {
+                return emptyObjectType;
             }
-            var result = createSymbol(valueSymbol.flags | typeSymbol.flags, valueSymbol.name);
-            result.declarations = ts.concatenate(valueSymbol.declarations, typeSymbol.declarations);
-            result.parent = valueSymbol.parent || typeSymbol.parent;
-            if (valueSymbol.valueDeclaration)
-                result.valueDeclaration = valueSymbol.valueDeclaration;
-            if (typeSymbol.members)
-                result.members = typeSymbol.members;
-            if (valueSymbol.exports)
-                result.exports = valueSymbol.exports;
-            return result;
-        }
-        function getExportOfModule(symbol, name) {
-            if (symbol.flags & 1536 /* Module */) {
-                var exportedSymbol = getExportsOfSymbol(symbol)[name];
-                if (exportedSymbol) {
-                    return resolveSymbol(exportedSymbol);
-                }
+            var typeSet = [];
+            addTypesToIntersection(typeSet, types);
+            if (typeSet.containsNever) {
+                return neverType;
+            }
+            if (typeSet.containsAny) {
+                return anyType;
+            }
+            if (typeSet.containsEmptyObject && !typeSet.containsObjectType) {
+                typeSet.push(emptyObjectType);
             }
+            if (typeSet.length === 1) {
+                return typeSet[0];
+            }
+            var unionIndex = typeSet.unionIndex;
+            if (unionIndex !== undefined) {
+                // We are attempting to construct a type of the form X & (A | B) & Y. Transform this into a type of
+                // the form X & A & Y | X & B & Y and recursively reduce until no union type constituents remain.
+                var unionType = typeSet[unionIndex];
+                return getUnionType(ts.map(unionType.types, function (t) { return getIntersectionType(ts.replaceElement(typeSet, unionIndex, t)); }), 
+                /*subtypeReduction*/ false, aliasSymbol, aliasTypeArguments);
+            }
+            var id = getTypeListId(typeSet);
+            var type = intersectionTypes.get(id);
+            if (!type) {
+                var propagatedFlags = getPropagatingFlagsOfTypes(typeSet, /*excludeKinds*/ 6144 /* Nullable */);
+                type = createType(131072 /* Intersection */ | propagatedFlags);
+                intersectionTypes.set(id, type);
+                type.types = typeSet;
+                type.aliasSymbol = aliasSymbol;
+                type.aliasTypeArguments = aliasTypeArguments;
+            }
+            return type;
         }
-        function getPropertyOfVariable(symbol, name) {
-            if (symbol.flags & 3 /* Variable */) {
-                var typeAnnotation = symbol.valueDeclaration.type;
-                if (typeAnnotation) {
-                    return resolveSymbol(getPropertyOfType(getTypeFromTypeNode(typeAnnotation), name));
-                }
+        function getTypeFromIntersectionTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = getIntersectionType(ts.map(node.types, getTypeFromTypeNode), getAliasSymbolForTypeNode(node), getAliasTypeArgumentsForTypeNode(node));
             }
+            return links.resolvedType;
         }
-        function getExternalModuleMember(node, specifier) {
-            var moduleSymbol = resolveExternalModuleName(node, node.moduleSpecifier);
-            var targetSymbol = resolveESModuleSymbol(moduleSymbol, node.moduleSpecifier);
-            if (targetSymbol) {
-                var name_13 = specifier.propertyName || specifier.name;
-                if (name_13.text) {
-                    if (ts.isShorthandAmbientModuleSymbol(moduleSymbol)) {
-                        return moduleSymbol;
-                    }
-                    var symbolFromVariable = void 0;
-                    // First check if module was specified with "export=". If so, get the member from the resolved type
-                    if (moduleSymbol && moduleSymbol.exports && moduleSymbol.exports["export="]) {
-                        symbolFromVariable = getPropertyOfType(getTypeOfSymbol(targetSymbol), name_13.text);
-                    }
-                    else {
-                        symbolFromVariable = getPropertyOfVariable(targetSymbol, name_13.text);
-                    }
-                    // if symbolFromVariable is export - get its final target
-                    symbolFromVariable = resolveSymbol(symbolFromVariable);
-                    var symbolFromModule = getExportOfModule(targetSymbol, name_13.text);
-                    // If the export member we're looking for is default, and there is no real default but allowSyntheticDefaultImports is on, return the entire module as the default
-                    if (!symbolFromModule && allowSyntheticDefaultImports && name_13.text === "default") {
-                        symbolFromModule = resolveExternalModuleSymbol(moduleSymbol) || resolveSymbol(moduleSymbol);
-                    }
-                    var symbol = symbolFromModule && symbolFromVariable ?
-                        combineValueAndTypeSymbols(symbolFromVariable, symbolFromModule) :
-                        symbolFromModule || symbolFromVariable;
-                    if (!symbol) {
-                        error(name_13, ts.Diagnostics.Module_0_has_no_exported_member_1, getFullyQualifiedName(moduleSymbol), ts.declarationNameToString(name_13));
-                    }
-                    return symbol;
-                }
+        function getIndexTypeForGenericType(type) {
+            if (!type.resolvedIndexType) {
+                type.resolvedIndexType = createType(262144 /* Index */);
+                type.resolvedIndexType.type = type;
             }
+            return type.resolvedIndexType;
         }
-        function getTargetOfImportSpecifier(node) {
-            return getExternalModuleMember(node.parent.parent.parent, node);
+        function getLiteralTypeFromPropertyName(prop) {
+            return ts.getDeclarationModifierFlagsFromSymbol(prop) & 24 /* NonPublicAccessibilityModifier */ || ts.startsWith(prop.name, "__@") ?
+                neverType :
+                getLiteralType(ts.unescapeIdentifier(prop.name));
         }
-        function getTargetOfNamespaceExportDeclaration(node) {
-            return resolveExternalModuleSymbol(node.parent.symbol);
+        function getLiteralTypeFromPropertyNames(type) {
+            return getUnionType(ts.map(getPropertiesOfType(type), getLiteralTypeFromPropertyName));
         }
-        function getTargetOfExportSpecifier(node) {
-            return node.parent.parent.moduleSpecifier ?
-                getExternalModuleMember(node.parent.parent, node) :
-                resolveEntityName(node.propertyName || node.name, 107455 /* Value */ | 793064 /* Type */ | 1920 /* Namespace */);
+        function getIndexType(type) {
+            return maybeTypeOfKind(type, 540672 /* TypeVariable */) ? getIndexTypeForGenericType(type) :
+                getObjectFlags(type) & 32 /* Mapped */ ? getConstraintTypeFromMappedType(type) :
+                    type.flags & 1 /* Any */ || getIndexInfoOfType(type, 0 /* String */) ? stringType :
+                        getLiteralTypeFromPropertyNames(type);
         }
-        function getTargetOfExportAssignment(node) {
-            return resolveEntityName(node.expression, 107455 /* Value */ | 793064 /* Type */ | 1920 /* Namespace */);
+        function getIndexTypeOrString(type) {
+            var indexType = getIndexType(type);
+            return indexType !== neverType ? indexType : stringType;
         }
-        function getTargetOfAliasDeclaration(node) {
-            switch (node.kind) {
-                case 229 /* ImportEqualsDeclaration */:
-                    return getTargetOfImportEqualsDeclaration(node);
-                case 231 /* ImportClause */:
-                    return getTargetOfImportClause(node);
-                case 232 /* NamespaceImport */:
-                    return getTargetOfNamespaceImport(node);
-                case 234 /* ImportSpecifier */:
-                    return getTargetOfImportSpecifier(node);
-                case 238 /* ExportSpecifier */:
-                    return getTargetOfExportSpecifier(node);
-                case 235 /* ExportAssignment */:
-                    return getTargetOfExportAssignment(node);
-                case 228 /* NamespaceExportDeclaration */:
-                    return getTargetOfNamespaceExportDeclaration(node);
-            }
-        }
-        function resolveSymbol(symbol) {
-            return symbol && symbol.flags & 8388608 /* Alias */ && !(symbol.flags & (107455 /* Value */ | 793064 /* Type */ | 1920 /* Namespace */)) ? resolveAlias(symbol) : symbol;
+        function getTypeFromTypeOperatorNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = getIndexType(getTypeFromTypeNode(node.type));
+            }
+            return links.resolvedType;
         }
-        function resolveAlias(symbol) {
-            ts.Debug.assert((symbol.flags & 8388608 /* Alias */) !== 0, "Should only get Alias here.");
-            var links = getSymbolLinks(symbol);
-            if (!links.target) {
-                links.target = resolvingSymbol;
-                var node = getDeclarationOfAliasSymbol(symbol);
-                ts.Debug.assert(!!node);
-                var target = getTargetOfAliasDeclaration(node);
-                if (links.target === resolvingSymbol) {
-                    links.target = target || unknownSymbol;
-                }
-                else {
-                    error(node, ts.Diagnostics.Circular_definition_of_import_alias_0, symbolToString(symbol));
+        function createIndexedAccessType(objectType, indexType) {
+            var type = createType(524288 /* IndexedAccess */);
+            type.objectType = objectType;
+            type.indexType = indexType;
+            return type;
+        }
+        function getPropertyTypeForIndexType(objectType, indexType, accessNode, cacheSymbol) {
+            var accessExpression = accessNode && accessNode.kind === 180 /* ElementAccessExpression */ ? accessNode : undefined;
+            var propName = indexType.flags & 96 /* StringOrNumberLiteral */ ?
+                "" + indexType.value :
+                accessExpression && checkThatExpressionIsProperSymbolReference(accessExpression.argumentExpression, indexType, /*reportError*/ false) ?
+                    ts.getPropertyNameForKnownSymbolName(accessExpression.argumentExpression.name.text) :
+                    undefined;
+            if (propName !== undefined) {
+                var prop = getPropertyOfType(objectType, propName);
+                if (prop) {
+                    if (accessExpression) {
+                        if (ts.isAssignmentTarget(accessExpression) && (isReferenceToReadonlyEntity(accessExpression, prop) || isReferenceThroughNamespaceImport(accessExpression))) {
+                            error(accessExpression.argumentExpression, ts.Diagnostics.Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property, symbolToString(prop));
+                            return unknownType;
+                        }
+                        if (cacheSymbol) {
+                            getNodeLinks(accessNode).resolvedSymbol = prop;
+                        }
+                    }
+                    return getTypeOfSymbol(prop);
                 }
             }
-            else if (links.target === resolvingSymbol) {
-                links.target = unknownSymbol;
-            }
-            return links.target;
-        }
-        function markExportAsReferenced(node) {
-            var symbol = getSymbolOfNode(node);
-            var target = resolveAlias(symbol);
-            if (target) {
-                var markAlias = target === unknownSymbol ||
-                    ((target.flags & 107455 /* Value */) && !isConstEnumOrConstEnumOnlyModule(target));
-                if (markAlias) {
-                    markAliasSymbolAsReferenced(symbol);
+            if (isTypeAnyOrAllConstituentTypesHaveKind(indexType, 262178 /* StringLike */ | 84 /* NumberLike */ | 512 /* ESSymbol */)) {
+                if (isTypeAny(objectType)) {
+                    return anyType;
+                }
+                var indexInfo = isTypeAnyOrAllConstituentTypesHaveKind(indexType, 84 /* NumberLike */) && getIndexInfoOfType(objectType, 1 /* Number */) ||
+                    getIndexInfoOfType(objectType, 0 /* String */) ||
+                    undefined;
+                if (indexInfo) {
+                    if (accessExpression && indexInfo.isReadonly && (ts.isAssignmentTarget(accessExpression) || ts.isDeleteTarget(accessExpression))) {
+                        error(accessExpression, ts.Diagnostics.Index_signature_in_type_0_only_permits_reading, typeToString(objectType));
+                        return unknownType;
+                    }
+                    return indexInfo.type;
+                }
+                if (accessExpression && !isConstEnumObjectType(objectType)) {
+                    if (noImplicitAny && !compilerOptions.suppressImplicitAnyIndexErrors) {
+                        if (getIndexTypeOfType(objectType, 1 /* Number */)) {
+                            error(accessExpression.argumentExpression, ts.Diagnostics.Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number);
+                        }
+                        else {
+                            error(accessExpression, ts.Diagnostics.Element_implicitly_has_an_any_type_because_type_0_has_no_index_signature, typeToString(objectType));
+                        }
+                    }
+                    return anyType;
                 }
             }
-        }
-        // When an alias symbol is referenced, we need to mark the entity it references as referenced and in turn repeat that until
-        // we reach a non-alias or an exported entity (which is always considered referenced). We do this by checking the target of
-        // the alias as an expression (which recursively takes us back here if the target references another alias).
-        function markAliasSymbolAsReferenced(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.referenced) {
-                links.referenced = true;
-                var node = getDeclarationOfAliasSymbol(symbol);
-                ts.Debug.assert(!!node);
-                if (node.kind === 235 /* ExportAssignment */) {
-                    // export default <symbol>
-                    checkExpressionCached(node.expression);
+            if (accessNode) {
+                var indexNode = accessNode.kind === 180 /* ElementAccessExpression */ ? accessNode.argumentExpression : accessNode.indexType;
+                if (indexType.flags & (32 /* StringLiteral */ | 64 /* NumberLiteral */)) {
+                    error(indexNode, ts.Diagnostics.Property_0_does_not_exist_on_type_1, "" + indexType.value, typeToString(objectType));
                 }
-                else if (node.kind === 238 /* ExportSpecifier */) {
-                    // export { <symbol> } or export { <symbol> as foo }
-                    checkExpressionCached(node.propertyName || node.name);
+                else if (indexType.flags & (2 /* String */ | 4 /* Number */)) {
+                    error(indexNode, ts.Diagnostics.Type_0_has_no_matching_index_signature_for_type_1, typeToString(objectType), typeToString(indexType));
                 }
-                else if (ts.isInternalModuleImportEqualsDeclaration(node)) {
-                    // import foo = <symbol>
-                    checkExpressionCached(node.moduleReference);
+                else {
+                    error(indexNode, ts.Diagnostics.Type_0_cannot_be_used_as_an_index_type, typeToString(indexType));
                 }
+                return unknownType;
             }
+            return anyType;
         }
-        // This function is only for imports with entity names
-        function getSymbolOfPartOfRightHandSideOfImportEquals(entityName, importDeclaration, dontResolveAlias) {
-            // There are three things we might try to look for. In the following examples,
-            // the search term is enclosed in |...|:
-            //
-            //     import a = |b|; // Namespace
-            //     import a = |b.c|; // Value, type, namespace
-            //     import a = |b.c|.d; // Namespace
-            if (entityName.kind === 69 /* Identifier */ && ts.isRightSideOfQualifiedNameOrPropertyAccess(entityName)) {
-                entityName = entityName.parent;
+        function getIndexedAccessForMappedType(type, indexType, accessNode) {
+            var accessExpression = accessNode && accessNode.kind === 180 /* ElementAccessExpression */ ? accessNode : undefined;
+            if (accessExpression && ts.isAssignmentTarget(accessExpression) && type.declaration.readonlyToken) {
+                error(accessExpression, ts.Diagnostics.Index_signature_in_type_0_only_permits_reading, typeToString(type));
+                return unknownType;
             }
-            // Check for case 1 and 3 in the above example
-            if (entityName.kind === 69 /* Identifier */ || entityName.parent.kind === 139 /* QualifiedName */) {
-                return resolveEntityName(entityName, 1920 /* Namespace */, /*ignoreErrors*/ false, dontResolveAlias);
+            var mapper = createTypeMapper([getTypeParameterFromMappedType(type)], [indexType]);
+            var templateMapper = type.mapper ? combineTypeMappers(type.mapper, mapper) : mapper;
+            return instantiateType(getTemplateTypeFromMappedType(type), templateMapper);
+        }
+        function getIndexedAccessType(objectType, indexType, accessNode) {
+            // If the index type is generic, if the object type is generic and doesn't originate in an expression,
+            // or if the object type is a mapped type with a generic constraint, we are performing a higher-order
+            // index access where we cannot meaningfully access the properties of the object type. Note that for a
+            // generic T and a non-generic K, we eagerly resolve T[K] if it originates in an expression. This is to
+            // preserve backwards compatibility. For example, an element access 'this["foo"]' has always been resolved
+            // eagerly using the constraint type of 'this' at the given location.
+            if (maybeTypeOfKind(indexType, 540672 /* TypeVariable */ | 262144 /* Index */) ||
+                maybeTypeOfKind(objectType, 540672 /* TypeVariable */) && !(accessNode && accessNode.kind === 180 /* ElementAccessExpression */) ||
+                isGenericMappedType(objectType)) {
+                if (objectType.flags & 1 /* Any */) {
+                    return objectType;
+                }
+                // If the object type is a mapped type { [P in K]: E }, we instantiate E using a mapper that substitutes
+                // the index type for P. For example, for an index access { [P in K]: Box<T[P]> }[X], we construct the
+                // type Box<T[X]>.
+                if (isGenericMappedType(objectType)) {
+                    return getIndexedAccessForMappedType(objectType, indexType, accessNode);
+                }
+                // Otherwise we defer the operation by creating an indexed access type.
+                var id = objectType.id + "," + indexType.id;
+                var type = indexedAccessTypes.get(id);
+                if (!type) {
+                    indexedAccessTypes.set(id, type = createIndexedAccessType(objectType, indexType));
+                }
+                return type;
             }
-            else {
-                // Case 2 in above example
-                // entityName.kind could be a QualifiedName or a Missing identifier
-                ts.Debug.assert(entityName.parent.kind === 229 /* ImportEqualsDeclaration */);
-                return resolveEntityName(entityName, 107455 /* Value */ | 793064 /* Type */ | 1920 /* Namespace */, /*ignoreErrors*/ false, dontResolveAlias);
+            // In the following we resolve T[K] to the type of the property in T selected by K.
+            var apparentObjectType = getApparentType(objectType);
+            if (indexType.flags & 65536 /* Union */ && !(indexType.flags & 8190 /* Primitive */)) {
+                var propTypes = [];
+                for (var _i = 0, _a = indexType.types; _i < _a.length; _i++) {
+                    var t = _a[_i];
+                    var propType = getPropertyTypeForIndexType(apparentObjectType, t, accessNode, /*cacheSymbol*/ false);
+                    if (propType === unknownType) {
+                        return unknownType;
+                    }
+                    propTypes.push(propType);
+                }
+                return getUnionType(propTypes);
             }
+            return getPropertyTypeForIndexType(apparentObjectType, indexType, accessNode, /*cacheSymbol*/ true);
         }
-        function getFullyQualifiedName(symbol) {
-            return symbol.parent ? getFullyQualifiedName(symbol.parent) + "." + symbolToString(symbol) : symbolToString(symbol);
+        function getTypeFromIndexedAccessTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = getIndexedAccessType(getTypeFromTypeNode(node.objectType), getTypeFromTypeNode(node.indexType), node);
+            }
+            return links.resolvedType;
         }
-        // Resolves a qualified name and any involved aliases
-        function resolveEntityName(name, meaning, ignoreErrors, dontResolveAlias, location) {
-            if (ts.nodeIsMissing(name)) {
-                return undefined;
+        function getTypeFromMappedTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                var type = createObjectType(32 /* Mapped */, node.symbol);
+                type.declaration = node;
+                type.aliasSymbol = getAliasSymbolForTypeNode(node);
+                type.aliasTypeArguments = getAliasTypeArgumentsForTypeNode(node);
+                links.resolvedType = type;
+                // Eagerly resolve the constraint type which forces an error if the constraint type circularly
+                // references itself through one or more type aliases.
+                getConstraintTypeFromMappedType(type);
             }
-            var symbol;
-            if (name.kind === 69 /* Identifier */) {
-                var message = meaning === 1920 /* Namespace */ ? ts.Diagnostics.Cannot_find_namespace_0 : ts.Diagnostics.Cannot_find_name_0;
-                symbol = resolveName(location || name, name.text, meaning, ignoreErrors ? undefined : message, name);
-                if (!symbol) {
-                    return undefined;
+            return links.resolvedType;
+        }
+        function getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                // Deferred resolution of members is handled by resolveObjectTypeMembers
+                var aliasSymbol = getAliasSymbolForTypeNode(node);
+                if (node.symbol.members.size === 0 && !aliasSymbol) {
+                    links.resolvedType = emptyTypeLiteralType;
+                }
+                else {
+                    var type = createObjectType(16 /* Anonymous */, node.symbol);
+                    type.aliasSymbol = aliasSymbol;
+                    type.aliasTypeArguments = getAliasTypeArgumentsForTypeNode(node);
+                    links.resolvedType = type;
                 }
             }
-            else if (name.kind === 139 /* QualifiedName */ || name.kind === 172 /* PropertyAccessExpression */) {
-                var left = name.kind === 139 /* QualifiedName */ ? name.left : name.expression;
-                var right = name.kind === 139 /* QualifiedName */ ? name.right : name.name;
-                var namespace = resolveEntityName(left, 1920 /* Namespace */, ignoreErrors, /*dontResolveAlias*/ false, location);
-                if (!namespace || ts.nodeIsMissing(right)) {
-                    return undefined;
+            return links.resolvedType;
+        }
+        function getAliasSymbolForTypeNode(node) {
+            return node.parent.kind === 231 /* TypeAliasDeclaration */ ? getSymbolOfNode(node.parent) : undefined;
+        }
+        function getAliasTypeArgumentsForTypeNode(node) {
+            var symbol = getAliasSymbolForTypeNode(node);
+            return symbol ? getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol) : undefined;
+        }
+        /**
+         * Since the source of spread types are object literals, which are not binary,
+         * this function should be called in a left folding style, with left = previous result of getSpreadType
+         * and right = the new element to be spread.
+         */
+        function getSpreadType(left, right) {
+            if (left.flags & 1 /* Any */ || right.flags & 1 /* Any */) {
+                return anyType;
+            }
+            if (left.flags & 8192 /* Never */) {
+                return right;
+            }
+            if (right.flags & 8192 /* Never */) {
+                return left;
+            }
+            if (left.flags & 65536 /* Union */) {
+                return mapType(left, function (t) { return getSpreadType(t, right); });
+            }
+            if (right.flags & 65536 /* Union */) {
+                return mapType(right, function (t) { return getSpreadType(left, t); });
+            }
+            if (right.flags & 16777216 /* NonPrimitive */) {
+                return emptyObjectType;
+            }
+            var members = ts.createMap();
+            var skippedPrivateMembers = ts.createMap();
+            var stringIndexInfo;
+            var numberIndexInfo;
+            if (left === emptyObjectType) {
+                // for the first spread element, left === emptyObjectType, so take the right's string indexer
+                stringIndexInfo = getIndexInfoOfType(right, 0 /* String */);
+                numberIndexInfo = getIndexInfoOfType(right, 1 /* Number */);
+            }
+            else {
+                stringIndexInfo = unionSpreadIndexInfos(getIndexInfoOfType(left, 0 /* String */), getIndexInfoOfType(right, 0 /* String */));
+                numberIndexInfo = unionSpreadIndexInfos(getIndexInfoOfType(left, 1 /* Number */), getIndexInfoOfType(right, 1 /* Number */));
+            }
+            for (var _i = 0, _a = getPropertiesOfType(right); _i < _a.length; _i++) {
+                var rightProp = _a[_i];
+                // we approximate own properties as non-methods plus methods that are inside the object literal
+                var isSetterWithoutGetter = rightProp.flags & 65536 /* SetAccessor */ && !(rightProp.flags & 32768 /* GetAccessor */);
+                if (ts.getDeclarationModifierFlagsFromSymbol(rightProp) & (8 /* Private */ | 16 /* Protected */)) {
+                    skippedPrivateMembers.set(rightProp.name, true);
                 }
-                else if (namespace === unknownSymbol) {
-                    return namespace;
+                else if (!isClassMethod(rightProp) && !isSetterWithoutGetter) {
+                    members.set(rightProp.name, getNonReadonlySymbol(rightProp));
                 }
-                symbol = getSymbol(getExportsOfSymbol(namespace), right.text, meaning);
-                if (!symbol) {
-                    if (!ignoreErrors) {
-                        error(right, ts.Diagnostics.Namespace_0_has_no_exported_member_1, getFullyQualifiedName(namespace), ts.declarationNameToString(right));
+            }
+            for (var _b = 0, _c = getPropertiesOfType(left); _b < _c.length; _b++) {
+                var leftProp = _c[_b];
+                if (leftProp.flags & 65536 /* SetAccessor */ && !(leftProp.flags & 32768 /* GetAccessor */)
+                    || skippedPrivateMembers.has(leftProp.name)
+                    || isClassMethod(leftProp)) {
+                    continue;
+                }
+                if (members.has(leftProp.name)) {
+                    var rightProp = members.get(leftProp.name);
+                    var rightType = getTypeOfSymbol(rightProp);
+                    if (rightProp.flags & 67108864 /* Optional */) {
+                        var declarations = ts.concatenate(leftProp.declarations, rightProp.declarations);
+                        var flags = 4 /* Property */ | (leftProp.flags & 67108864 /* Optional */);
+                        var result = createSymbol(flags, leftProp.name);
+                        result.type = getUnionType([getTypeOfSymbol(leftProp), getTypeWithFacts(rightType, 131072 /* NEUndefined */)]);
+                        result.leftSpread = leftProp;
+                        result.rightSpread = rightProp;
+                        result.declarations = declarations;
+                        members.set(leftProp.name, result);
                     }
-                    return undefined;
+                }
+                else {
+                    members.set(leftProp.name, getNonReadonlySymbol(leftProp));
                 }
             }
-            else {
-                ts.Debug.fail("Unknown entity name kind.");
+            return createAnonymousType(undefined, members, emptyArray, emptyArray, stringIndexInfo, numberIndexInfo);
+        }
+        function getNonReadonlySymbol(prop) {
+            if (!isReadonlySymbol(prop)) {
+                return prop;
             }
-            ts.Debug.assert((symbol.flags & 16777216 /* Instantiated */) === 0, "Should never get an instantiated symbol here.");
-            return (symbol.flags & meaning) || dontResolveAlias ? symbol : resolveAlias(symbol);
+            var flags = 4 /* Property */ | (prop.flags & 67108864 /* Optional */);
+            var result = createSymbol(flags, prop.name);
+            result.type = getTypeOfSymbol(prop);
+            result.declarations = prop.declarations;
+            result.syntheticOrigin = prop;
+            return result;
         }
-        function resolveExternalModuleName(location, moduleReferenceExpression) {
-            return resolveExternalModuleNameWorker(location, moduleReferenceExpression, ts.Diagnostics.Cannot_find_module_0);
+        function isClassMethod(prop) {
+            return prop.flags & 8192 /* Method */ && ts.find(prop.declarations, function (decl) { return ts.isClassLike(decl.parent); });
         }
-        function resolveExternalModuleNameWorker(location, moduleReferenceExpression, moduleNotFoundError) {
-            if (moduleReferenceExpression.kind !== 9 /* StringLiteral */) {
-                return;
+        function createLiteralType(flags, value, symbol) {
+            var type = createType(flags);
+            type.symbol = symbol;
+            type.value = value;
+            return type;
+        }
+        function getFreshTypeOfLiteralType(type) {
+            if (type.flags & 96 /* StringOrNumberLiteral */ && !(type.flags & 1048576 /* FreshLiteral */)) {
+                if (!type.freshType) {
+                    var freshType = createLiteralType(type.flags | 1048576 /* FreshLiteral */, type.value, type.symbol);
+                    freshType.regularType = type;
+                    type.freshType = freshType;
+                }
+                return type.freshType;
             }
-            var moduleReferenceLiteral = moduleReferenceExpression;
-            return resolveExternalModule(location, moduleReferenceLiteral.text, moduleNotFoundError, moduleReferenceLiteral);
+            return type;
         }
-        function resolveExternalModule(location, moduleReference, moduleNotFoundError, errorNode) {
-            // Module names are escaped in our symbol table.  However, string literal values aren't.
-            // Escape the name in the "require(...)" clause to ensure we find the right symbol.
-            var moduleName = ts.escapeIdentifier(moduleReference);
-            if (moduleName === undefined) {
-                return;
+        function getRegularTypeOfLiteralType(type) {
+            return type.flags & 96 /* StringOrNumberLiteral */ && type.flags & 1048576 /* FreshLiteral */ ? type.regularType : type;
+        }
+        function getLiteralType(value, enumId, symbol) {
+            // We store all literal types in a single map with keys of the form '#NNN' and '@SSS',
+            // where NNN is the text representation of a numeric literal and SSS are the characters
+            // of a string literal. For literal enum members we use 'EEE#NNN' and 'EEE@SSS', where
+            // EEE is a unique id for the containing enum type.
+            var qualifier = typeof value === "number" ? "#" : "@";
+            var key = enumId ? enumId + qualifier + value : qualifier + value;
+            var type = literalTypes.get(key);
+            if (!type) {
+                var flags = (typeof value === "number" ? 64 /* NumberLiteral */ : 32 /* StringLiteral */) | (enumId ? 256 /* EnumLiteral */ : 0);
+                literalTypes.set(key, type = createLiteralType(flags, value, symbol));
             }
-            var isRelative = ts.isExternalModuleNameRelative(moduleName);
-            if (!isRelative) {
-                var symbol = getSymbol(globals, '"' + moduleName + '"', 512 /* ValueModule */);
-                if (symbol) {
-                    // merged symbol is module declaration symbol combined with all augmentations
-                    return getMergedSymbol(symbol);
-                }
+            return type;
+        }
+        function getTypeFromLiteralTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = getRegularTypeOfLiteralType(checkExpression(node.literal));
             }
-            var resolvedModule = ts.getResolvedModule(ts.getSourceFileOfNode(location), moduleReference);
-            var sourceFile = resolvedModule && host.getSourceFile(resolvedModule.resolvedFileName);
-            if (sourceFile) {
-                if (sourceFile.symbol) {
-                    // merged symbol is module declaration symbol combined with all augmentations
-                    return getMergedSymbol(sourceFile.symbol);
-                }
-                if (moduleNotFoundError) {
-                    // report errors only if it was requested
-                    error(errorNode, ts.Diagnostics.File_0_is_not_a_module, sourceFile.fileName);
-                }
-                return undefined;
+            return links.resolvedType;
+        }
+        function getTypeFromJSDocVariadicType(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                var type = getTypeFromTypeNode(node.type);
+                links.resolvedType = type ? createArrayType(type) : unknownType;
             }
-            if (patternAmbientModules) {
-                var pattern = ts.findBestPatternMatch(patternAmbientModules, function (_) { return _.pattern; }, moduleName);
-                if (pattern) {
-                    return getMergedSymbol(pattern.symbol);
+            return links.resolvedType;
+        }
+        function getTypeFromJSDocTupleType(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                var types = ts.map(node.types, getTypeFromTypeNode);
+                links.resolvedType = createTupleType(types);
+            }
+            return links.resolvedType;
+        }
+        function getThisType(node) {
+            var container = ts.getThisContainer(node, /*includeArrowFunctions*/ false);
+            var parent = container && container.parent;
+            if (parent && (ts.isClassLike(parent) || parent.kind === 230 /* InterfaceDeclaration */)) {
+                if (!(ts.getModifierFlags(container) & 32 /* Static */) &&
+                    (container.kind !== 152 /* Constructor */ || ts.isNodeDescendantOf(node, container.body))) {
+                    return getDeclaredTypeOfClassOrInterface(getSymbolOfNode(parent)).thisType;
                 }
             }
-            if (moduleNotFoundError) {
-                // report errors only if it was requested
-                var tsExtension = ts.tryExtractTypeScriptExtension(moduleName);
-                if (tsExtension) {
-                    var diag = ts.Diagnostics.An_import_path_cannot_end_with_a_0_extension_Consider_importing_1_instead;
-                    error(errorNode, diag, tsExtension, ts.removeExtension(moduleName, tsExtension));
-                }
-                else {
-                    error(errorNode, moduleNotFoundError, moduleName);
+            error(node, ts.Diagnostics.A_this_type_is_available_only_in_a_non_static_member_of_a_class_or_interface);
+            return unknownType;
+        }
+        function getTypeFromThisTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = getThisType(node);
+            }
+            return links.resolvedType;
+        }
+        function getTypeFromTypeNode(node) {
+            switch (node.kind) {
+                case 119 /* AnyKeyword */:
+                case 268 /* JSDocAllType */:
+                case 269 /* JSDocUnknownType */:
+                    return anyType;
+                case 136 /* StringKeyword */:
+                    return stringType;
+                case 133 /* NumberKeyword */:
+                    return numberType;
+                case 122 /* BooleanKeyword */:
+                    return booleanType;
+                case 137 /* SymbolKeyword */:
+                    return esSymbolType;
+                case 105 /* VoidKeyword */:
+                    return voidType;
+                case 139 /* UndefinedKeyword */:
+                    return undefinedType;
+                case 95 /* NullKeyword */:
+                    return nullType;
+                case 130 /* NeverKeyword */:
+                    return neverType;
+                case 134 /* ObjectKeyword */:
+                    return nonPrimitiveType;
+                case 169 /* ThisType */:
+                case 99 /* ThisKeyword */:
+                    return getTypeFromThisTypeNode(node);
+                case 173 /* LiteralType */:
+                    return getTypeFromLiteralTypeNode(node);
+                case 294 /* JSDocLiteralType */:
+                    return getTypeFromLiteralTypeNode(node.literal);
+                case 159 /* TypeReference */:
+                case 277 /* JSDocTypeReference */:
+                    return getTypeFromTypeReference(node);
+                case 158 /* TypePredicate */:
+                    return booleanType;
+                case 201 /* ExpressionWithTypeArguments */:
+                    return getTypeFromTypeReference(node);
+                case 162 /* TypeQuery */:
+                    return getTypeFromTypeQueryNode(node);
+                case 164 /* ArrayType */:
+                case 270 /* JSDocArrayType */:
+                    return getTypeFromArrayTypeNode(node);
+                case 165 /* TupleType */:
+                    return getTypeFromTupleTypeNode(node);
+                case 166 /* UnionType */:
+                case 271 /* JSDocUnionType */:
+                    return getTypeFromUnionTypeNode(node);
+                case 167 /* IntersectionType */:
+                    return getTypeFromIntersectionTypeNode(node);
+                case 273 /* JSDocNullableType */:
+                    return getTypeFromJSDocNullableTypeNode(node);
+                case 168 /* ParenthesizedType */:
+                case 274 /* JSDocNonNullableType */:
+                case 281 /* JSDocConstructorType */:
+                case 282 /* JSDocThisType */:
+                case 278 /* JSDocOptionalType */:
+                    return getTypeFromTypeNode(node.type);
+                case 275 /* JSDocRecordType */:
+                    return getTypeFromTypeNode(node.literal);
+                case 160 /* FunctionType */:
+                case 161 /* ConstructorType */:
+                case 163 /* TypeLiteral */:
+                case 293 /* JSDocTypeLiteral */:
+                case 279 /* JSDocFunctionType */:
+                    return getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node);
+                case 170 /* TypeOperator */:
+                    return getTypeFromTypeOperatorNode(node);
+                case 171 /* IndexedAccessType */:
+                    return getTypeFromIndexedAccessTypeNode(node);
+                case 172 /* MappedType */:
+                    return getTypeFromMappedTypeNode(node);
+                // This function assumes that an identifier or qualified name is a type expression
+                // Callers should first ensure this by calling isTypeNode
+                case 71 /* Identifier */:
+                case 143 /* QualifiedName */:
+                    var symbol = getSymbolAtLocation(node);
+                    return symbol && getDeclaredTypeOfSymbol(symbol);
+                case 272 /* JSDocTupleType */:
+                    return getTypeFromJSDocTupleType(node);
+                case 280 /* JSDocVariadicType */:
+                    return getTypeFromJSDocVariadicType(node);
+                default:
+                    return unknownType;
+            }
+        }
+        function instantiateList(items, mapper, instantiator) {
+            if (items && items.length) {
+                var result = [];
+                for (var _i = 0, items_1 = items; _i < items_1.length; _i++) {
+                    var v = items_1[_i];
+                    result.push(instantiator(v, mapper));
                 }
+                return result;
             }
-            return undefined;
+            return items;
         }
-        // An external module with an 'export =' declaration resolves to the target of the 'export =' declaration,
-        // and an external module with no 'export =' declaration resolves to the module itself.
-        function resolveExternalModuleSymbol(moduleSymbol) {
-            return moduleSymbol && getMergedSymbol(resolveSymbol(moduleSymbol.exports["export="])) || moduleSymbol;
+        function instantiateTypes(types, mapper) {
+            return instantiateList(types, mapper, instantiateType);
         }
-        // An external module with an 'export =' declaration may be referenced as an ES6 module provided the 'export ='
-        // references a symbol that is at least declared as a module or a variable. The target of the 'export =' may
-        // combine other declarations with the module or variable (e.g. a class/module, function/module, interface/variable).
-        function resolveESModuleSymbol(moduleSymbol, moduleReferenceExpression) {
-            var symbol = resolveExternalModuleSymbol(moduleSymbol);
-            if (symbol && !(symbol.flags & (1536 /* Module */ | 3 /* Variable */))) {
-                error(moduleReferenceExpression, ts.Diagnostics.Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct, symbolToString(moduleSymbol));
-                symbol = undefined;
-            }
-            return symbol;
+        function instantiateSignatures(signatures, mapper) {
+            return instantiateList(signatures, mapper, instantiateSignature);
         }
-        function hasExportAssignmentSymbol(moduleSymbol) {
-            return moduleSymbol.exports["export="] !== undefined;
+        function instantiateCached(type, mapper, instantiator) {
+            var instantiations = mapper.instantiations || (mapper.instantiations = []);
+            return instantiations[type.id] || (instantiations[type.id] = instantiator(type, mapper));
         }
-        function getExportsOfModuleAsArray(moduleSymbol) {
-            return symbolsToArray(getExportsOfModule(moduleSymbol));
+        function makeUnaryTypeMapper(source, target) {
+            return function (t) { return t === source ? target : t; };
         }
-        function getExportsOfSymbol(symbol) {
-            return symbol.flags & 1536 /* Module */ ? getExportsOfModule(symbol) : symbol.exports || emptySymbols;
+        function makeBinaryTypeMapper(source1, target1, source2, target2) {
+            return function (t) { return t === source1 ? target1 : t === source2 ? target2 : t; };
         }
-        function getExportsOfModule(moduleSymbol) {
-            var links = getSymbolLinks(moduleSymbol);
-            return links.resolvedExports || (links.resolvedExports = getExportsForModule(moduleSymbol));
+        function makeArrayTypeMapper(sources, targets) {
+            return function (t) {
+                for (var i = 0; i < sources.length; i++) {
+                    if (t === sources[i]) {
+                        return targets ? targets[i] : anyType;
+                    }
+                }
+                return t;
+            };
+        }
+        function createTypeMapper(sources, targets) {
+            var mapper = sources.length === 1 ? makeUnaryTypeMapper(sources[0], targets ? targets[0] : anyType) :
+                sources.length === 2 ? makeBinaryTypeMapper(sources[0], targets ? targets[0] : anyType, sources[1], targets ? targets[1] : anyType) :
+                    makeArrayTypeMapper(sources, targets);
+            mapper.mappedTypes = sources;
+            return mapper;
+        }
+        function createTypeEraser(sources) {
+            return createTypeMapper(sources, /*targets*/ undefined);
         }
         /**
-         * Extends one symbol table with another while collecting information on name collisions for error message generation into the `lookupTable` argument
-         * Not passing `lookupTable` and `exportNode` disables this collection, and just extends the tables
+         * Maps forward-references to later types parameters to the empty object type.
+         * This is used during inference when instantiating type parameter defaults.
          */
-        function extendExportSymbols(target, source, lookupTable, exportNode) {
-            for (var id in source) {
-                if (id !== "default" && !target[id]) {
-                    target[id] = source[id];
-                    if (lookupTable && exportNode) {
-                        lookupTable[id] = {
-                            specifierText: ts.getTextOfNode(exportNode.moduleSpecifier)
-                        };
-                    }
-                }
-                else if (lookupTable && exportNode && id !== "default" && target[id] && resolveSymbol(target[id]) !== resolveSymbol(source[id])) {
-                    if (!lookupTable[id].exportsWithDuplicate) {
-                        lookupTable[id].exportsWithDuplicate = [exportNode];
-                    }
-                    else {
-                        lookupTable[id].exportsWithDuplicate.push(exportNode);
-                    }
-                }
-            }
+        function createBackreferenceMapper(typeParameters, index) {
+            var mapper = function (t) { return ts.indexOf(typeParameters, t) >= index ? emptyObjectType : t; };
+            mapper.mappedTypes = typeParameters;
+            return mapper;
         }
-        function getExportsForModule(moduleSymbol) {
-            var visitedSymbols = [];
-            return visit(moduleSymbol) || moduleSymbol.exports;
-            // The ES6 spec permits export * declarations in a module to circularly reference the module itself. For example,
-            // module 'a' can 'export * from "b"' and 'b' can 'export * from "a"' without error.
-            function visit(symbol) {
-                if (!(symbol && symbol.flags & 1952 /* HasExports */ && !ts.contains(visitedSymbols, symbol))) {
-                    return;
-                }
-                visitedSymbols.push(symbol);
-                var symbols = ts.cloneMap(symbol.exports);
-                // All export * declarations are collected in an __export symbol by the binder
-                var exportStars = symbol.exports["__export"];
-                if (exportStars) {
-                    var nestedSymbols = ts.createMap();
-                    var lookupTable = ts.createMap();
-                    for (var _i = 0, _a = exportStars.declarations; _i < _a.length; _i++) {
-                        var node = _a[_i];
-                        var resolvedModule = resolveExternalModuleName(node, node.moduleSpecifier);
-                        var exportedSymbols = visit(resolvedModule);
-                        extendExportSymbols(nestedSymbols, exportedSymbols, lookupTable, node);
-                    }
-                    for (var id in lookupTable) {
-                        var exportsWithDuplicate = lookupTable[id].exportsWithDuplicate;
-                        // It's not an error if the file with multiple `export *`s with duplicate names exports a member with that name itself
-                        if (id === "export=" || !(exportsWithDuplicate && exportsWithDuplicate.length) || symbols[id]) {
-                            continue;
-                        }
-                        for (var _b = 0, exportsWithDuplicate_1 = exportsWithDuplicate; _b < exportsWithDuplicate_1.length; _b++) {
-                            var node = exportsWithDuplicate_1[_b];
-                            diagnostics.add(ts.createDiagnosticForNode(node, ts.Diagnostics.Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambiguity, lookupTable[id].specifierText, id));
-                        }
-                    }
-                    extendExportSymbols(symbols, nestedSymbols);
-                }
-                return symbols;
-            }
+        function isInferenceContext(mapper) {
+            return !!mapper.signature;
         }
-        function getMergedSymbol(symbol) {
-            var merged;
-            return symbol && symbol.mergeId && (merged = mergedSymbols[symbol.mergeId]) ? merged : symbol;
+        function cloneTypeMapper(mapper) {
+            return mapper && isInferenceContext(mapper) ?
+                createInferenceContext(mapper.signature, mapper.flags | 2 /* NoDefault */, mapper.inferences) :
+                mapper;
         }
-        function getSymbolOfNode(node) {
-            return getMergedSymbol(node.symbol);
+        function identityMapper(type) {
+            return type;
         }
-        function getParentOfSymbol(symbol) {
-            return getMergedSymbol(symbol.parent);
+        function combineTypeMappers(mapper1, mapper2) {
+            var mapper = function (t) { return instantiateType(mapper1(t), mapper2); };
+            mapper.mappedTypes = ts.concatenate(mapper1.mappedTypes, mapper2.mappedTypes);
+            return mapper;
         }
-        function getExportSymbolOfValueSymbolIfExported(symbol) {
-            return symbol && (symbol.flags & 1048576 /* ExportValue */) !== 0
-                ? getMergedSymbol(symbol.exportSymbol)
-                : symbol;
+        function createReplacementMapper(source, target, baseMapper) {
+            var mapper = function (t) { return t === source ? target : baseMapper(t); };
+            mapper.mappedTypes = baseMapper.mappedTypes;
+            return mapper;
         }
-        function symbolIsValue(symbol) {
-            // If it is an instantiated symbol, then it is a value if the symbol it is an
-            // instantiation of is a value.
-            if (symbol.flags & 16777216 /* Instantiated */) {
-                return symbolIsValue(getSymbolLinks(symbol).target);
-            }
-            // If the symbol has the value flag, it is trivially a value.
-            if (symbol.flags & 107455 /* Value */) {
-                return true;
+        function cloneTypeParameter(typeParameter) {
+            var result = createType(16384 /* TypeParameter */);
+            result.symbol = typeParameter.symbol;
+            result.target = typeParameter;
+            return result;
+        }
+        function cloneTypePredicate(predicate, mapper) {
+            if (ts.isIdentifierTypePredicate(predicate)) {
+                return {
+                    kind: 1 /* Identifier */,
+                    parameterName: predicate.parameterName,
+                    parameterIndex: predicate.parameterIndex,
+                    type: instantiateType(predicate.type, mapper)
+                };
             }
-            // If it is an alias, then it is a value if the symbol it resolves to is a value.
-            if (symbol.flags & 8388608 /* Alias */) {
-                return (resolveAlias(symbol).flags & 107455 /* Value */) !== 0;
+            else {
+                return {
+                    kind: 0 /* This */,
+                    type: instantiateType(predicate.type, mapper)
+                };
             }
-            return false;
         }
-        function findConstructorDeclaration(node) {
-            var members = node.members;
-            for (var _i = 0, members_1 = members; _i < members_1.length; _i++) {
-                var member = members_1[_i];
-                if (member.kind === 148 /* Constructor */ && ts.nodeIsPresent(member.body)) {
-                    return member;
+        function instantiateSignature(signature, mapper, eraseTypeParameters) {
+            var freshTypeParameters;
+            var freshTypePredicate;
+            if (signature.typeParameters && !eraseTypeParameters) {
+                // First create a fresh set of type parameters, then include a mapping from the old to the
+                // new type parameters in the mapper function. Finally store this mapper in the new type
+                // parameters such that we can use it when instantiating constraints.
+                freshTypeParameters = ts.map(signature.typeParameters, cloneTypeParameter);
+                mapper = combineTypeMappers(createTypeMapper(signature.typeParameters, freshTypeParameters), mapper);
+                for (var _i = 0, freshTypeParameters_1 = freshTypeParameters; _i < freshTypeParameters_1.length; _i++) {
+                    var tp = freshTypeParameters_1[_i];
+                    tp.mapper = mapper;
                 }
             }
-        }
-        function createType(flags) {
-            var result = new Type(checker, flags);
-            typeCount++;
-            result.id = typeCount;
+            if (signature.typePredicate) {
+                freshTypePredicate = cloneTypePredicate(signature.typePredicate, mapper);
+            }
+            var result = createSignature(signature.declaration, freshTypeParameters, signature.thisParameter && instantiateSymbol(signature.thisParameter, mapper), instantiateList(signature.parameters, mapper, instantiateSymbol), 
+            /*resolvedReturnType*/ undefined, freshTypePredicate, signature.minArgumentCount, signature.hasRestParameter, signature.hasLiteralTypes);
+            result.target = signature;
+            result.mapper = mapper;
             return result;
         }
-        function createIntrinsicType(kind, intrinsicName) {
-            var type = createType(kind);
-            type.intrinsicName = intrinsicName;
-            return type;
-        }
-        function createBooleanType(trueFalseTypes) {
-            var type = getUnionType(trueFalseTypes);
-            type.flags |= 8 /* Boolean */;
-            type.intrinsicName = "boolean";
-            return type;
-        }
-        function createObjectType(kind, symbol) {
-            var type = createType(kind);
-            type.symbol = symbol;
-            return type;
+        function instantiateSymbol(symbol, mapper) {
+            if (ts.getCheckFlags(symbol) & 1 /* Instantiated */) {
+                var links = getSymbolLinks(symbol);
+                // If symbol being instantiated is itself a instantiation, fetch the original target and combine the
+                // type mappers. This ensures that original type identities are properly preserved and that aliases
+                // always reference a non-aliases.
+                symbol = links.target;
+                mapper = combineTypeMappers(links.mapper, mapper);
+            }
+            // Keep the flags from the symbol we're instantiating.  Mark that is instantiated, and
+            // also transient so that we can just store data on it directly.
+            var result = createSymbol(symbol.flags, symbol.name);
+            result.checkFlags = 1 /* Instantiated */;
+            result.declarations = symbol.declarations;
+            result.parent = symbol.parent;
+            result.target = symbol;
+            result.mapper = mapper;
+            if (symbol.valueDeclaration) {
+                result.valueDeclaration = symbol.valueDeclaration;
+            }
+            return result;
         }
-        // A reserved member name starts with two underscores, but the third character cannot be an underscore
-        // or the @ symbol. A third underscore indicates an escaped form of an identifer that started
-        // with at least two underscores. The @ character indicates that the name is denoted by a well known ES
-        // Symbol instance.
-        function isReservedMemberName(name) {
-            return name.charCodeAt(0) === 95 /* _ */ &&
-                name.charCodeAt(1) === 95 /* _ */ &&
-                name.charCodeAt(2) !== 95 /* _ */ &&
-                name.charCodeAt(2) !== 64 /* at */;
+        function instantiateAnonymousType(type, mapper) {
+            var result = createObjectType(16 /* Anonymous */ | 64 /* Instantiated */, type.symbol);
+            result.target = type.objectFlags & 64 /* Instantiated */ ? type.target : type;
+            result.mapper = type.objectFlags & 64 /* Instantiated */ ? combineTypeMappers(type.mapper, mapper) : mapper;
+            result.aliasSymbol = type.aliasSymbol;
+            result.aliasTypeArguments = instantiateTypes(type.aliasTypeArguments, mapper);
+            return result;
         }
-        function getNamedMembers(members) {
-            var result;
-            for (var id in members) {
-                if (!isReservedMemberName(id)) {
-                    if (!result)
-                        result = [];
-                    var symbol = members[id];
-                    if (symbolIsValue(symbol)) {
-                        result.push(symbol);
+        function instantiateMappedType(type, mapper) {
+            // Check if we have a homomorphic mapped type, i.e. a type of the form { [P in keyof T]: X } for some
+            // type variable T. If so, the mapped type is distributive over a union type and when T is instantiated
+            // to a union type A | B, we produce { [P in keyof A]: X } | { [P in keyof B]: X }. Furthermore, for
+            // homomorphic mapped types we leave primitive types alone. For example, when T is instantiated to a
+            // union type A | undefined, we produce { [P in keyof A]: X } | undefined.
+            var constraintType = getConstraintTypeFromMappedType(type);
+            if (constraintType.flags & 262144 /* Index */) {
+                var typeVariable_1 = constraintType.type;
+                if (typeVariable_1.flags & 16384 /* TypeParameter */) {
+                    var mappedTypeVariable = instantiateType(typeVariable_1, mapper);
+                    if (typeVariable_1 !== mappedTypeVariable) {
+                        return mapType(mappedTypeVariable, function (t) {
+                            if (isMappableType(t)) {
+                                return instantiateMappedObjectType(type, createReplacementMapper(typeVariable_1, t, mapper));
+                            }
+                            return t;
+                        });
                     }
                 }
             }
-            return result || emptyArray;
+            return instantiateMappedObjectType(type, mapper);
         }
-        function setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo) {
-            type.members = members;
-            type.properties = getNamedMembers(members);
-            type.callSignatures = callSignatures;
-            type.constructSignatures = constructSignatures;
-            if (stringIndexInfo)
-                type.stringIndexInfo = stringIndexInfo;
-            if (numberIndexInfo)
-                type.numberIndexInfo = numberIndexInfo;
-            return type;
+        function isMappableType(type) {
+            return type.flags & (16384 /* TypeParameter */ | 32768 /* Object */ | 131072 /* Intersection */ | 524288 /* IndexedAccess */);
         }
-        function createAnonymousType(symbol, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo) {
-            return setObjectTypeMembers(createObjectType(2097152 /* Anonymous */, symbol), members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+        function instantiateMappedObjectType(type, mapper) {
+            var result = createObjectType(32 /* Mapped */ | 64 /* Instantiated */, type.symbol);
+            result.declaration = type.declaration;
+            result.mapper = type.mapper ? combineTypeMappers(type.mapper, mapper) : mapper;
+            result.aliasSymbol = type.aliasSymbol;
+            result.aliasTypeArguments = instantiateTypes(type.aliasTypeArguments, mapper);
+            return result;
         }
-        function forEachSymbolTableInScope(enclosingDeclaration, callback) {
-            var result;
-            for (var location_1 = enclosingDeclaration; location_1; location_1 = location_1.parent) {
-                // Locals of a source file are not in scope (because they get merged into the global symbol table)
-                if (location_1.locals && !isGlobalSourceFile(location_1)) {
-                    if (result = callback(location_1.locals)) {
-                        return result;
-                    }
+        function isSymbolInScopeOfMappedTypeParameter(symbol, mapper) {
+            if (!(symbol.declarations && symbol.declarations.length)) {
+                return false;
+            }
+            var mappedTypes = mapper.mappedTypes;
+            // Starting with the parent of the symbol's declaration, check if the mapper maps any of
+            // the type parameters introduced by enclosing declarations. We just pick the first
+            // declaration since multiple declarations will all have the same parent anyway.
+            return !!ts.findAncestor(symbol.declarations[0], function (node) {
+                if (node.kind === 233 /* ModuleDeclaration */ || node.kind === 265 /* SourceFile */) {
+                    return "quit";
                 }
-                switch (location_1.kind) {
-                    case 256 /* SourceFile */:
-                        if (!ts.isExternalOrCommonJsModule(location_1)) {
-                            break;
+                switch (node.kind) {
+                    case 160 /* FunctionType */:
+                    case 161 /* ConstructorType */:
+                    case 228 /* FunctionDeclaration */:
+                    case 151 /* MethodDeclaration */:
+                    case 150 /* MethodSignature */:
+                    case 152 /* Constructor */:
+                    case 155 /* CallSignature */:
+                    case 156 /* ConstructSignature */:
+                    case 157 /* IndexSignature */:
+                    case 153 /* GetAccessor */:
+                    case 154 /* SetAccessor */:
+                    case 186 /* FunctionExpression */:
+                    case 187 /* ArrowFunction */:
+                    case 229 /* ClassDeclaration */:
+                    case 199 /* ClassExpression */:
+                    case 230 /* InterfaceDeclaration */:
+                    case 231 /* TypeAliasDeclaration */:
+                        var typeParameters = ts.getEffectiveTypeParameterDeclarations(node);
+                        if (typeParameters) {
+                            for (var _i = 0, typeParameters_1 = typeParameters; _i < typeParameters_1.length; _i++) {
+                                var d = typeParameters_1[_i];
+                                if (ts.contains(mappedTypes, getDeclaredTypeOfTypeParameter(getSymbolOfNode(d)))) {
+                                    return true;
+                                }
+                            }
                         }
-                    case 225 /* ModuleDeclaration */:
-                        if (result = callback(getSymbolOfNode(location_1).exports)) {
-                            return result;
+                        if (ts.isClassLike(node) || node.kind === 230 /* InterfaceDeclaration */) {
+                            var thisType = getDeclaredTypeOfClassOrInterface(getSymbolOfNode(node)).thisType;
+                            if (thisType && ts.contains(mappedTypes, thisType)) {
+                                return true;
+                            }
+                        }
+                        break;
+                    case 172 /* MappedType */:
+                        if (ts.contains(mappedTypes, getDeclaredTypeOfTypeParameter(getSymbolOfNode(node.typeParameter)))) {
+                            return true;
+                        }
+                        break;
+                    case 279 /* JSDocFunctionType */:
+                        var func = node;
+                        for (var _a = 0, _b = func.parameters; _a < _b.length; _a++) {
+                            var p = _b[_a];
+                            if (ts.contains(mappedTypes, getTypeOfNode(p))) {
+                                return true;
+                            }
                         }
                         break;
                 }
-            }
-            return callback(globals);
+            });
         }
-        function getQualifiedLeftMeaning(rightMeaning) {
-            // If we are looking in value space, the parent meaning is value, other wise it is namespace
-            return rightMeaning === 107455 /* Value */ ? 107455 /* Value */ : 1920 /* Namespace */;
+        function isTopLevelTypeAlias(symbol) {
+            if (symbol.declarations && symbol.declarations.length) {
+                var parentKind = symbol.declarations[0].parent.kind;
+                return parentKind === 265 /* SourceFile */ || parentKind === 234 /* ModuleBlock */;
+            }
+            return false;
         }
-        function getAccessibleSymbolChain(symbol, enclosingDeclaration, meaning, useOnlyExternalAliasing) {
-            function getAccessibleSymbolChainFromSymbolTable(symbols) {
-                function canQualifySymbol(symbolFromSymbolTable, meaning) {
-                    // If the symbol is equivalent and doesn't need further qualification, this symbol is accessible
-                    if (!needsQualification(symbolFromSymbolTable, enclosingDeclaration, meaning)) {
-                        return true;
-                    }
-                    // If symbol needs qualification, make sure that parent is accessible, if it is then this symbol is accessible too
-                    var accessibleParent = getAccessibleSymbolChain(symbolFromSymbolTable.parent, enclosingDeclaration, getQualifiedLeftMeaning(meaning), useOnlyExternalAliasing);
-                    return !!accessibleParent;
-                }
-                function isAccessible(symbolFromSymbolTable, resolvedAliasSymbol) {
-                    if (symbol === (resolvedAliasSymbol || symbolFromSymbolTable)) {
-                        // if the symbolFromSymbolTable is not external module (it could be if it was determined as ambient external module and would be in globals table)
-                        // and if symbolFromSymbolTable or alias resolution matches the symbol,
-                        // check the symbol can be qualified, it is only then this symbol is accessible
-                        return !ts.forEach(symbolFromSymbolTable.declarations, hasExternalModuleSymbol) &&
-                            canQualifySymbol(symbolFromSymbolTable, meaning);
-                    }
-                }
-                // If symbol is directly available by its name in the symbol table
-                if (isAccessible(symbols[symbol.name])) {
-                    return [symbol];
-                }
-                // Check if symbol is any of the alias
-                return ts.forEachProperty(symbols, function (symbolFromSymbolTable) {
-                    if (symbolFromSymbolTable.flags & 8388608 /* Alias */
-                        && symbolFromSymbolTable.name !== "export="
-                        && !ts.getDeclarationOfKind(symbolFromSymbolTable, 238 /* ExportSpecifier */)) {
-                        if (!useOnlyExternalAliasing ||
-                            // Is this external alias, then use it to name
-                            ts.forEach(symbolFromSymbolTable.declarations, ts.isExternalModuleImportEqualsDeclaration)) {
-                            var resolvedImportedSymbol = resolveAlias(symbolFromSymbolTable);
-                            if (isAccessible(symbolFromSymbolTable, resolveAlias(symbolFromSymbolTable))) {
-                                return [symbolFromSymbolTable];
-                            }
-                            // Look in the exported members, if we can find accessibleSymbolChain, symbol is accessible using this chain
-                            // but only if the symbolFromSymbolTable can be qualified
-                            var accessibleSymbolsFromExports = resolvedImportedSymbol.exports ? getAccessibleSymbolChainFromSymbolTable(resolvedImportedSymbol.exports) : undefined;
-                            if (accessibleSymbolsFromExports && canQualifySymbol(symbolFromSymbolTable, getQualifiedLeftMeaning(meaning))) {
-                                return [symbolFromSymbolTable].concat(accessibleSymbolsFromExports);
-                            }
-                        }
+        function instantiateType(type, mapper) {
+            if (type && mapper !== identityMapper) {
+                // If we are instantiating a type that has a top-level type alias, obtain the instantiation through
+                // the type alias instead in order to share instantiations for the same type arguments. This can
+                // dramatically reduce the number of structurally identical types we generate. Note that we can only
+                // perform this optimization for top-level type aliases. Consider:
+                //
+                //   function f1<T>(x: T) {
+                //     type Foo<X> = { x: X, t: T };
+                //     let obj: Foo<T> = { x: x };
+                //     return obj;
+                //   }
+                //   function f2<U>(x: U) { return f1(x); }
+                //   let z = f2(42);
+                //
+                // Above, the declaration of f2 has an inferred return type that is an instantiation of f1's Foo<X>
+                // equivalent to { x: U, t: U }. When instantiating this return type, we can't go back to Foo<X>'s
+                // cache because all cached instantiations are of the form { x: ???, t: T }, i.e. they have not been
+                // instantiated for T. Instead, we need to further instantiate the { x: U, t: U } form.
+                if (type.aliasSymbol && isTopLevelTypeAlias(type.aliasSymbol)) {
+                    if (type.aliasTypeArguments) {
+                        return getTypeAliasInstantiation(type.aliasSymbol, instantiateTypes(type.aliasTypeArguments, mapper));
                     }
-                });
-            }
-            if (symbol) {
-                if (!(isPropertyOrMethodDeclarationSymbol(symbol))) {
-                    return forEachSymbolTableInScope(enclosingDeclaration, getAccessibleSymbolChainFromSymbolTable);
+                    return type;
                 }
+                return instantiateTypeNoAlias(type, mapper);
             }
+            return type;
         }
-        function needsQualification(symbol, enclosingDeclaration, meaning) {
-            var qualify = false;
-            forEachSymbolTableInScope(enclosingDeclaration, function (symbolTable) {
-                // If symbol of this name is not available in the symbol table we are ok
-                var symbolFromSymbolTable = symbolTable[symbol.name];
-                if (!symbolFromSymbolTable) {
-                    // Continue to the next symbol table
-                    return false;
+        function instantiateTypeNoAlias(type, mapper) {
+            if (type.flags & 16384 /* TypeParameter */) {
+                return mapper(type);
+            }
+            if (type.flags & 32768 /* Object */) {
+                if (type.objectFlags & 16 /* Anonymous */) {
+                    // If the anonymous type originates in a declaration of a function, method, class, or
+                    // interface, in an object type literal, or in an object literal expression, we may need
+                    // to instantiate the type because it might reference a type parameter. We skip instantiation
+                    // if none of the type parameters that are in scope in the type's declaration are mapped by
+                    // the given mapper, however we can only do that analysis if the type isn't itself an
+                    // instantiation.
+                    return type.symbol &&
+                        type.symbol.flags & (16 /* Function */ | 8192 /* Method */ | 32 /* Class */ | 2048 /* TypeLiteral */ | 4096 /* ObjectLiteral */) &&
+                        (type.objectFlags & 64 /* Instantiated */ || isSymbolInScopeOfMappedTypeParameter(type.symbol, mapper)) ?
+                        instantiateCached(type, mapper, instantiateAnonymousType) : type;
                 }
-                // If the symbol with this name is present it should refer to the symbol
-                if (symbolFromSymbolTable === symbol) {
-                    // No need to qualify
-                    return true;
+                if (type.objectFlags & 32 /* Mapped */) {
+                    return instantiateCached(type, mapper, instantiateMappedType);
                 }
-                // Qualify if the symbol from symbol table has same meaning as expected
-                symbolFromSymbolTable = (symbolFromSymbolTable.flags & 8388608 /* Alias */ && !ts.getDeclarationOfKind(symbolFromSymbolTable, 238 /* ExportSpecifier */)) ? resolveAlias(symbolFromSymbolTable) : symbolFromSymbolTable;
-                if (symbolFromSymbolTable.flags & meaning) {
-                    qualify = true;
-                    return true;
+                if (type.objectFlags & 4 /* Reference */) {
+                    return createTypeReference(type.target, instantiateTypes(type.typeArguments, mapper));
                 }
-                // Continue to the next symbol table
+            }
+            if (type.flags & 65536 /* Union */ && !(type.flags & 8190 /* Primitive */)) {
+                return getUnionType(instantiateTypes(type.types, mapper), /*subtypeReduction*/ false, type.aliasSymbol, instantiateTypes(type.aliasTypeArguments, mapper));
+            }
+            if (type.flags & 131072 /* Intersection */) {
+                return getIntersectionType(instantiateTypes(type.types, mapper), type.aliasSymbol, instantiateTypes(type.aliasTypeArguments, mapper));
+            }
+            if (type.flags & 262144 /* Index */) {
+                return getIndexType(instantiateType(type.type, mapper));
+            }
+            if (type.flags & 524288 /* IndexedAccess */) {
+                return getIndexedAccessType(instantiateType(type.objectType, mapper), instantiateType(type.indexType, mapper));
+            }
+            return type;
+        }
+        function instantiateIndexInfo(info, mapper) {
+            return info && createIndexInfo(instantiateType(info.type, mapper), info.isReadonly, info.declaration);
+        }
+        // Returns true if the given expression contains (at any level of nesting) a function or arrow expression
+        // that is subject to contextual typing.
+        function isContextSensitive(node) {
+            ts.Debug.assert(node.kind !== 151 /* MethodDeclaration */ || ts.isObjectLiteralMethod(node));
+            switch (node.kind) {
+                case 186 /* FunctionExpression */:
+                case 187 /* ArrowFunction */:
+                    return isContextSensitiveFunctionLikeDeclaration(node);
+                case 178 /* ObjectLiteralExpression */:
+                    return ts.forEach(node.properties, isContextSensitive);
+                case 177 /* ArrayLiteralExpression */:
+                    return ts.forEach(node.elements, isContextSensitive);
+                case 195 /* ConditionalExpression */:
+                    return isContextSensitive(node.whenTrue) ||
+                        isContextSensitive(node.whenFalse);
+                case 194 /* BinaryExpression */:
+                    return node.operatorToken.kind === 54 /* BarBarToken */ &&
+                        (isContextSensitive(node.left) || isContextSensitive(node.right));
+                case 261 /* PropertyAssignment */:
+                    return isContextSensitive(node.initializer);
+                case 151 /* MethodDeclaration */:
+                case 150 /* MethodSignature */:
+                    return isContextSensitiveFunctionLikeDeclaration(node);
+                case 185 /* ParenthesizedExpression */:
+                    return isContextSensitive(node.expression);
+                case 254 /* JsxAttributes */:
+                    return ts.forEach(node.properties, isContextSensitive);
+                case 253 /* JsxAttribute */:
+                    // If there is no initializer, JSX attribute has a boolean value of true which is not context sensitive.
+                    return node.initializer && isContextSensitive(node.initializer);
+                case 256 /* JsxExpression */:
+                    // It is possible to that node.expression is undefined (e.g <div x={} />)
+                    return node.expression && isContextSensitive(node.expression);
+            }
+            return false;
+        }
+        function isContextSensitiveFunctionLikeDeclaration(node) {
+            // Functions with type parameters are not context sensitive.
+            if (node.typeParameters) {
                 return false;
-            });
-            return qualify;
+            }
+            // Functions with any parameters that lack type annotations are context sensitive.
+            if (ts.forEach(node.parameters, function (p) { return !ts.getEffectiveTypeAnnotationNode(p); })) {
+                return true;
+            }
+            // For arrow functions we now know we're not context sensitive.
+            if (node.kind === 187 /* ArrowFunction */) {
+                return false;
+            }
+            // If the first parameter is not an explicit 'this' parameter, then the function has
+            // an implicit 'this' parameter which is subject to contextual typing. Otherwise we
+            // know that all parameters (including 'this') have type annotations and nothing is
+            // subject to contextual typing.
+            var parameter = ts.firstOrUndefined(node.parameters);
+            return !(parameter && ts.parameterIsThisKeyword(parameter));
         }
-        function isPropertyOrMethodDeclarationSymbol(symbol) {
-            if (symbol.declarations && symbol.declarations.length) {
-                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                    var declaration = _a[_i];
-                    switch (declaration.kind) {
-                        case 145 /* PropertyDeclaration */:
-                        case 147 /* MethodDeclaration */:
-                        case 149 /* GetAccessor */:
-                        case 150 /* SetAccessor */:
-                            continue;
-                        default:
-                            return false;
-                    }
+        function isContextSensitiveFunctionOrObjectLiteralMethod(func) {
+            return (isFunctionExpressionOrArrowFunction(func) || ts.isObjectLiteralMethod(func)) && isContextSensitiveFunctionLikeDeclaration(func);
+        }
+        function getTypeWithoutSignatures(type) {
+            if (type.flags & 32768 /* Object */) {
+                var resolved = resolveStructuredTypeMembers(type);
+                if (resolved.constructSignatures.length) {
+                    var result = createObjectType(16 /* Anonymous */, type.symbol);
+                    result.members = resolved.members;
+                    result.properties = resolved.properties;
+                    result.callSignatures = emptyArray;
+                    result.constructSignatures = emptyArray;
+                    return result;
                 }
-                return true;
             }
-            return false;
+            else if (type.flags & 131072 /* Intersection */) {
+                return getIntersectionType(ts.map(type.types, getTypeWithoutSignatures));
+            }
+            return type;
+        }
+        // TYPE CHECKING
+        function isTypeIdenticalTo(source, target) {
+            return isTypeRelatedTo(source, target, identityRelation);
+        }
+        function compareTypesIdentical(source, target) {
+            return isTypeRelatedTo(source, target, identityRelation) ? -1 /* True */ : 0 /* False */;
+        }
+        function compareTypesAssignable(source, target) {
+            return isTypeRelatedTo(source, target, assignableRelation) ? -1 /* True */ : 0 /* False */;
+        }
+        function isTypeSubtypeOf(source, target) {
+            return isTypeRelatedTo(source, target, subtypeRelation);
+        }
+        function isTypeAssignableTo(source, target) {
+            return isTypeRelatedTo(source, target, assignableRelation);
+        }
+        // A type S is considered to be an instance of a type T if S and T are the same type or if S is a
+        // subtype of T but not structurally identical to T. This specifically means that two distinct but
+        // structurally identical types (such as two classes) are not considered instances of each other.
+        function isTypeInstanceOf(source, target) {
+            return getTargetType(source) === getTargetType(target) || isTypeSubtypeOf(source, target) && !isTypeIdenticalTo(source, target);
         }
         /**
-         * Check if the given symbol in given enclosing declaration is accessible and mark all associated alias to be visible if requested
+         * This is *not* a bi-directional relationship.
+         * If one needs to check both directions for comparability, use a second call to this function or 'checkTypeComparableTo'.
          *
-         * @param symbol a Symbol to check if accessible
-         * @param enclosingDeclaration a Node containing reference to the symbol
-         * @param meaning a SymbolFlags to check if such meaning of the symbol is accessible
-         * @param shouldComputeAliasToMakeVisible a boolean value to indicate whether to return aliases to be mark visible in case the symbol is accessible
+         * A type S is comparable to a type T if some (but not necessarily all) of the possible values of S are also possible values of T.
+         * It is used to check following cases:
+         *   - the types of the left and right sides of equality/inequality operators (`===`, `!==`, `==`, `!=`).
+         *   - the types of `case` clause expressions and their respective `switch` expressions.
+         *   - the type of an expression in a type assertion with the type being asserted.
          */
-        function isSymbolAccessible(symbol, enclosingDeclaration, meaning, shouldComputeAliasesToMakeVisible) {
-            if (symbol && enclosingDeclaration && !(symbol.flags & 262144 /* TypeParameter */)) {
-                var initialSymbol = symbol;
-                var meaningToLook = meaning;
-                while (symbol) {
-                    // Symbol is accessible if it by itself is accessible
-                    var accessibleSymbolChain = getAccessibleSymbolChain(symbol, enclosingDeclaration, meaningToLook, /*useOnlyExternalAliasing*/ false);
-                    if (accessibleSymbolChain) {
-                        var hasAccessibleDeclarations = hasVisibleDeclarations(accessibleSymbolChain[0], shouldComputeAliasesToMakeVisible);
-                        if (!hasAccessibleDeclarations) {
-                            return {
-                                accessibility: 1 /* NotAccessible */,
-                                errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning),
-                                errorModuleName: symbol !== initialSymbol ? symbolToString(symbol, enclosingDeclaration, 1920 /* Namespace */) : undefined,
-                            };
+        function isTypeComparableTo(source, target) {
+            return isTypeRelatedTo(source, target, comparableRelation);
+        }
+        function areTypesComparable(type1, type2) {
+            return isTypeComparableTo(type1, type2) || isTypeComparableTo(type2, type1);
+        }
+        function checkTypeAssignableTo(source, target, errorNode, headMessage, containingMessageChain) {
+            return checkTypeRelatedTo(source, target, assignableRelation, errorNode, headMessage, containingMessageChain);
+        }
+        /**
+         * This is *not* a bi-directional relationship.
+         * If one needs to check both directions for comparability, use a second call to this function or 'isTypeComparableTo'.
+         */
+        function checkTypeComparableTo(source, target, errorNode, headMessage, containingMessageChain) {
+            return checkTypeRelatedTo(source, target, comparableRelation, errorNode, headMessage, containingMessageChain);
+        }
+        function isSignatureAssignableTo(source, target, ignoreReturnTypes) {
+            return compareSignaturesRelated(source, target, /*checkAsCallback*/ false, ignoreReturnTypes, /*reportErrors*/ false, 
+            /*errorReporter*/ undefined, compareTypesAssignable) !== 0 /* False */;
+        }
+        /**
+         * See signatureRelatedTo, compareSignaturesIdentical
+         */
+        function compareSignaturesRelated(source, target, checkAsCallback, ignoreReturnTypes, reportErrors, errorReporter, compareTypes) {
+            // TODO (drosen): De-duplicate code between related functions.
+            if (source === target) {
+                return -1 /* True */;
+            }
+            if (!target.hasRestParameter && source.minArgumentCount > target.parameters.length) {
+                return 0 /* False */;
+            }
+            if (source.typeParameters) {
+                source = instantiateSignatureInContextOf(source, target);
+            }
+            var result = -1 /* True */;
+            var sourceThisType = getThisTypeOfSignature(source);
+            if (sourceThisType && sourceThisType !== voidType) {
+                var targetThisType = getThisTypeOfSignature(target);
+                if (targetThisType) {
+                    // void sources are assignable to anything.
+                    var related = compareTypes(sourceThisType, targetThisType, /*reportErrors*/ false)
+                        || compareTypes(targetThisType, sourceThisType, reportErrors);
+                    if (!related) {
+                        if (reportErrors) {
+                            errorReporter(ts.Diagnostics.The_this_types_of_each_signature_are_incompatible);
                         }
-                        return hasAccessibleDeclarations;
+                        return 0 /* False */;
                     }
-                    // If we haven't got the accessible symbol, it doesn't mean the symbol is actually inaccessible.
-                    // It could be a qualified symbol and hence verify the path
-                    // e.g.:
-                    // module m {
-                    //     export class c {
-                    //     }
-                    // }
-                    // const x: typeof m.c
-                    // In the above example when we start with checking if typeof m.c symbol is accessible,
-                    // we are going to see if c can be accessed in scope directly.
-                    // But it can't, hence the accessible is going to be undefined, but that doesn't mean m.c is inaccessible
-                    // It is accessible if the parent m is accessible because then m.c can be accessed through qualification
-                    meaningToLook = getQualifiedLeftMeaning(meaning);
-                    symbol = getParentOfSymbol(symbol);
+                    result &= related;
                 }
-                // This could be a symbol that is not exported in the external module
-                // or it could be a symbol from different external module that is not aliased and hence cannot be named
-                var symbolExternalModule = ts.forEach(initialSymbol.declarations, getExternalModuleContainer);
-                if (symbolExternalModule) {
-                    var enclosingExternalModule = getExternalModuleContainer(enclosingDeclaration);
-                    if (symbolExternalModule !== enclosingExternalModule) {
-                        // name from different external module that is not visible
-                        return {
-                            accessibility: 2 /* CannotBeNamed */,
-                            errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning),
-                            errorModuleName: symbolToString(symbolExternalModule)
-                        };
+            }
+            var sourceMax = getNumNonRestParameters(source);
+            var targetMax = getNumNonRestParameters(target);
+            var checkCount = getNumParametersToCheckForSignatureRelatability(source, sourceMax, target, targetMax);
+            var sourceParams = source.parameters;
+            var targetParams = target.parameters;
+            for (var i = 0; i < checkCount; i++) {
+                var sourceType = i < sourceMax ? getTypeOfParameter(sourceParams[i]) : getRestTypeOfSignature(source);
+                var targetType = i < targetMax ? getTypeOfParameter(targetParams[i]) : getRestTypeOfSignature(target);
+                var sourceSig = getSingleCallSignature(getNonNullableType(sourceType));
+                var targetSig = getSingleCallSignature(getNonNullableType(targetType));
+                // In order to ensure that any generic type Foo<T> is at least co-variant with respect to T no matter
+                // how Foo uses T, we need to relate parameters bi-variantly (given that parameters are input positions,
+                // they naturally relate only contra-variantly). However, if the source and target parameters both have
+                // function types with a single call signature, we known we are relating two callback parameters. In
+                // that case it is sufficient to only relate the parameters of the signatures co-variantly because,
+                // similar to return values, callback parameters are output positions. This means that a Promise<T>,
+                // where T is used only in callback parameter positions, will be co-variant (as opposed to bi-variant)
+                // with respect to T.
+                var callbacks = sourceSig && targetSig && !sourceSig.typePredicate && !targetSig.typePredicate &&
+                    (getFalsyFlags(sourceType) & 6144 /* Nullable */) === (getFalsyFlags(targetType) & 6144 /* Nullable */);
+                var related = callbacks ?
+                    compareSignaturesRelated(targetSig, sourceSig, /*checkAsCallback*/ true, /*ignoreReturnTypes*/ false, reportErrors, errorReporter, compareTypes) :
+                    !checkAsCallback && compareTypes(sourceType, targetType, /*reportErrors*/ false) || compareTypes(targetType, sourceType, reportErrors);
+                if (!related) {
+                    if (reportErrors) {
+                        errorReporter(ts.Diagnostics.Types_of_parameters_0_and_1_are_incompatible, sourceParams[i < sourceMax ? i : sourceMax].name, targetParams[i < targetMax ? i : targetMax].name);
                     }
+                    return 0 /* False */;
                 }
-                // Just a local name that is not accessible
-                return {
-                    accessibility: 1 /* NotAccessible */,
-                    errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning),
-                };
+                result &= related;
             }
-            return { accessibility: 0 /* Accessible */ };
-            function getExternalModuleContainer(declaration) {
-                for (; declaration; declaration = declaration.parent) {
-                    if (hasExternalModuleSymbol(declaration)) {
-                        return getSymbolOfNode(declaration);
+            if (!ignoreReturnTypes) {
+                var targetReturnType = getReturnTypeOfSignature(target);
+                if (targetReturnType === voidType) {
+                    return result;
+                }
+                var sourceReturnType = getReturnTypeOfSignature(source);
+                // The following block preserves behavior forbidding boolean returning functions from being assignable to type guard returning functions
+                if (target.typePredicate) {
+                    if (source.typePredicate) {
+                        result &= compareTypePredicateRelatedTo(source.typePredicate, target.typePredicate, reportErrors, errorReporter, compareTypes);
+                    }
+                    else if (ts.isIdentifierTypePredicate(target.typePredicate)) {
+                        if (reportErrors) {
+                            errorReporter(ts.Diagnostics.Signature_0_must_have_a_type_predicate, signatureToString(source));
+                        }
+                        return 0 /* False */;
                     }
                 }
+                else {
+                    // When relating callback signatures, we still need to relate return types bi-variantly as otherwise
+                    // the containing type wouldn't be co-variant. For example, interface Foo<T> { add(cb: () => T): void }
+                    // wouldn't be co-variant for T without this rule.
+                    result &= checkAsCallback && compareTypes(targetReturnType, sourceReturnType, /*reportErrors*/ false) ||
+                        compareTypes(sourceReturnType, targetReturnType, reportErrors);
+                }
             }
+            return result;
         }
-        function hasExternalModuleSymbol(declaration) {
-            return ts.isAmbientModule(declaration) || (declaration.kind === 256 /* SourceFile */ && ts.isExternalOrCommonJsModule(declaration));
-        }
-        function hasVisibleDeclarations(symbol, shouldComputeAliasToMakeVisible) {
-            var aliasesToMakeVisible;
-            if (ts.forEach(symbol.declarations, function (declaration) { return !getIsDeclarationVisible(declaration); })) {
-                return undefined;
+        function compareTypePredicateRelatedTo(source, target, reportErrors, errorReporter, compareTypes) {
+            if (source.kind !== target.kind) {
+                if (reportErrors) {
+                    errorReporter(ts.Diagnostics.A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard);
+                    errorReporter(ts.Diagnostics.Type_predicate_0_is_not_assignable_to_1, typePredicateToString(source), typePredicateToString(target));
+                }
+                return 0 /* False */;
             }
-            return { accessibility: 0 /* Accessible */, aliasesToMakeVisible: aliasesToMakeVisible };
-            function getIsDeclarationVisible(declaration) {
-                if (!isDeclarationVisible(declaration)) {
-                    // Mark the unexported alias as visible if its parent is visible
-                    // because these kind of aliases can be used to name types in declaration file
-                    var anyImportSyntax = getAnyImportSyntax(declaration);
-                    if (anyImportSyntax &&
-                        !(ts.getModifierFlags(anyImportSyntax) & 1 /* Export */) &&
-                        isDeclarationVisible(anyImportSyntax.parent)) {
-                        // In function "buildTypeDisplay" where we decide whether to write type-alias or serialize types,
-                        // we want to just check if type- alias is accessible or not but we don't care about emitting those alias at that time
-                        // since we will do the emitting later in trackSymbol.
-                        if (shouldComputeAliasToMakeVisible) {
-                            getNodeLinks(declaration).isVisible = true;
-                            if (aliasesToMakeVisible) {
-                                if (!ts.contains(aliasesToMakeVisible, anyImportSyntax)) {
-                                    aliasesToMakeVisible.push(anyImportSyntax);
-                                }
-                            }
-                            else {
-                                aliasesToMakeVisible = [anyImportSyntax];
-                            }
-                        }
-                        return true;
+            if (source.kind === 1 /* Identifier */) {
+                var sourceIdentifierPredicate = source;
+                var targetIdentifierPredicate = target;
+                if (sourceIdentifierPredicate.parameterIndex !== targetIdentifierPredicate.parameterIndex) {
+                    if (reportErrors) {
+                        errorReporter(ts.Diagnostics.Parameter_0_is_not_in_the_same_position_as_parameter_1, sourceIdentifierPredicate.parameterName, targetIdentifierPredicate.parameterName);
+                        errorReporter(ts.Diagnostics.Type_predicate_0_is_not_assignable_to_1, typePredicateToString(source), typePredicateToString(target));
                     }
-                    // Declaration is not visible
-                    return false;
+                    return 0 /* False */;
                 }
-                return true;
             }
+            var related = compareTypes(source.type, target.type, reportErrors);
+            if (related === 0 /* False */ && reportErrors) {
+                errorReporter(ts.Diagnostics.Type_predicate_0_is_not_assignable_to_1, typePredicateToString(source), typePredicateToString(target));
+            }
+            return related;
         }
-        function isEntityNameVisible(entityName, enclosingDeclaration) {
-            // get symbol of the first identifier of the entityName
-            var meaning;
-            if (entityName.parent.kind === 158 /* TypeQuery */ || ts.isExpressionWithTypeArgumentsInClassExtendsClause(entityName.parent)) {
-                // Typeof value
-                meaning = 107455 /* Value */ | 1048576 /* ExportValue */;
+        function isImplementationCompatibleWithOverload(implementation, overload) {
+            var erasedSource = getErasedSignature(implementation);
+            var erasedTarget = getErasedSignature(overload);
+            // First see if the return types are compatible in either direction.
+            var sourceReturnType = getReturnTypeOfSignature(erasedSource);
+            var targetReturnType = getReturnTypeOfSignature(erasedTarget);
+            if (targetReturnType === voidType
+                || isTypeRelatedTo(targetReturnType, sourceReturnType, assignableRelation)
+                || isTypeRelatedTo(sourceReturnType, targetReturnType, assignableRelation)) {
+                return isSignatureAssignableTo(erasedSource, erasedTarget, /*ignoreReturnTypes*/ true);
             }
-            else if (entityName.kind === 139 /* QualifiedName */ || entityName.kind === 172 /* PropertyAccessExpression */ ||
-                entityName.parent.kind === 229 /* ImportEqualsDeclaration */) {
-                // Left identifier from type reference or TypeAlias
-                // Entity name of the import declaration
-                meaning = 1920 /* Namespace */;
+            return false;
+        }
+        function getNumNonRestParameters(signature) {
+            var numParams = signature.parameters.length;
+            return signature.hasRestParameter ?
+                numParams - 1 :
+                numParams;
+        }
+        function getNumParametersToCheckForSignatureRelatability(source, sourceNonRestParamCount, target, targetNonRestParamCount) {
+            if (source.hasRestParameter === target.hasRestParameter) {
+                if (source.hasRestParameter) {
+                    // If both have rest parameters, get the max and add 1 to
+                    // compensate for the rest parameter.
+                    return Math.max(sourceNonRestParamCount, targetNonRestParamCount) + 1;
+                }
+                else {
+                    return Math.min(sourceNonRestParamCount, targetNonRestParamCount);
+                }
             }
             else {
-                // Type Reference or TypeAlias entity = Identifier
-                meaning = 793064 /* Type */;
+                // Return the count for whichever signature doesn't have rest parameters.
+                return source.hasRestParameter ?
+                    targetNonRestParamCount :
+                    sourceNonRestParamCount;
             }
-            var firstIdentifier = getFirstIdentifier(entityName);
-            var symbol = resolveName(enclosingDeclaration, firstIdentifier.text, meaning, /*nodeNotFoundErrorMessage*/ undefined, /*nameArg*/ undefined);
-            // Verify if the symbol is accessible
-            return (symbol && hasVisibleDeclarations(symbol, /*shouldComputeAliasToMakeVisible*/ true)) || {
-                accessibility: 1 /* NotAccessible */,
-                errorSymbolName: ts.getTextOfNode(firstIdentifier),
-                errorNode: firstIdentifier
-            };
-        }
-        function writeKeyword(writer, kind) {
-            writer.writeKeyword(ts.tokenToString(kind));
-        }
-        function writePunctuation(writer, kind) {
-            writer.writePunctuation(ts.tokenToString(kind));
-        }
-        function writeSpace(writer) {
-            writer.writeSpace(" ");
         }
-        function symbolToString(symbol, enclosingDeclaration, meaning) {
-            var writer = ts.getSingleLineStringWriter();
-            getSymbolDisplayBuilder().buildSymbolDisplay(symbol, writer, enclosingDeclaration, meaning);
-            var result = writer.string();
-            ts.releaseStringWriter(writer);
-            return result;
+        function isEmptyResolvedType(t) {
+            return t.properties.length === 0 &&
+                t.callSignatures.length === 0 &&
+                t.constructSignatures.length === 0 &&
+                !t.stringIndexInfo &&
+                !t.numberIndexInfo;
         }
-        function signatureToString(signature, enclosingDeclaration, flags, kind) {
-            var writer = ts.getSingleLineStringWriter();
-            getSymbolDisplayBuilder().buildSignatureDisplay(signature, writer, enclosingDeclaration, flags, kind);
-            var result = writer.string();
-            ts.releaseStringWriter(writer);
-            return result;
+        function isEmptyObjectType(type) {
+            return type.flags & 32768 /* Object */ ? isEmptyResolvedType(resolveStructuredTypeMembers(type)) :
+                type.flags & 16777216 /* NonPrimitive */ ? true :
+                    type.flags & 65536 /* Union */ ? ts.forEach(type.types, isEmptyObjectType) :
+                        type.flags & 131072 /* Intersection */ ? !ts.forEach(type.types, function (t) { return !isEmptyObjectType(t); }) :
+                            false;
         }
-        function typeToString(type, enclosingDeclaration, flags) {
-            var writer = ts.getSingleLineStringWriter();
-            getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
-            var result = writer.string();
-            ts.releaseStringWriter(writer);
-            var maxLength = compilerOptions.noErrorTruncation || flags & 4 /* NoTruncation */ ? undefined : 100;
-            if (maxLength && result.length >= maxLength) {
-                result = result.substr(0, maxLength - "...".length) + "...";
+        function isEnumTypeRelatedTo(sourceSymbol, targetSymbol, errorReporter) {
+            if (sourceSymbol === targetSymbol) {
+                return true;
             }
-            return result;
-        }
-        function typePredicateToString(typePredicate, enclosingDeclaration, flags) {
-            var writer = ts.getSingleLineStringWriter();
-            getSymbolDisplayBuilder().buildTypePredicateDisplay(typePredicate, writer, enclosingDeclaration, flags);
-            var result = writer.string();
-            ts.releaseStringWriter(writer);
-            return result;
-        }
-        function formatUnionTypes(types) {
-            var result = [];
-            var flags = 0;
-            for (var i = 0; i < types.length; i++) {
-                var t = types[i];
-                flags |= t.flags;
-                if (!(t.flags & 6144 /* Nullable */)) {
-                    if (t.flags & (128 /* BooleanLiteral */ | 256 /* EnumLiteral */)) {
-                        var baseType = t.flags & 128 /* BooleanLiteral */ ? booleanType : t.baseType;
-                        var count = baseType.types.length;
-                        if (i + count <= types.length && types[i + count - 1] === baseType.types[count - 1]) {
-                            result.push(baseType);
-                            i += count - 1;
-                            continue;
+            var id = getSymbolId(sourceSymbol) + "," + getSymbolId(targetSymbol);
+            var relation = enumRelation.get(id);
+            if (relation !== undefined) {
+                return relation;
+            }
+            if (sourceSymbol.name !== targetSymbol.name || !(sourceSymbol.flags & 256 /* RegularEnum */) || !(targetSymbol.flags & 256 /* RegularEnum */)) {
+                enumRelation.set(id, false);
+                return false;
+            }
+            var targetEnumType = getTypeOfSymbol(targetSymbol);
+            for (var _i = 0, _a = getPropertiesOfType(getTypeOfSymbol(sourceSymbol)); _i < _a.length; _i++) {
+                var property = _a[_i];
+                if (property.flags & 8 /* EnumMember */) {
+                    var targetProperty = getPropertyOfType(targetEnumType, property.name);
+                    if (!targetProperty || !(targetProperty.flags & 8 /* EnumMember */)) {
+                        if (errorReporter) {
+                            errorReporter(ts.Diagnostics.Property_0_is_missing_in_type_1, property.name, typeToString(getDeclaredTypeOfSymbol(targetSymbol), /*enclosingDeclaration*/ undefined, 256 /* UseFullyQualifiedType */));
                         }
+                        enumRelation.set(id, false);
+                        return false;
                     }
-                    result.push(t);
                 }
             }
-            if (flags & 4096 /* Null */)
-                result.push(nullType);
-            if (flags & 2048 /* Undefined */)
-                result.push(undefinedType);
-            return result || types;
+            enumRelation.set(id, true);
+            return true;
         }
-        function visibilityToString(flags) {
-            if (flags === 8 /* Private */) {
-                return "private";
+        function isSimpleTypeRelatedTo(source, target, relation, errorReporter) {
+            var s = source.flags;
+            var t = target.flags;
+            if (t & 8192 /* Never */)
+                return false;
+            if (t & 1 /* Any */ || s & 8192 /* Never */)
+                return true;
+            if (s & 262178 /* StringLike */ && t & 2 /* String */)
+                return true;
+            if (s & 32 /* StringLiteral */ && s & 256 /* EnumLiteral */ &&
+                t & 32 /* StringLiteral */ && !(t & 256 /* EnumLiteral */) &&
+                source.value === target.value)
+                return true;
+            if (s & 84 /* NumberLike */ && t & 4 /* Number */)
+                return true;
+            if (s & 64 /* NumberLiteral */ && s & 256 /* EnumLiteral */ &&
+                t & 64 /* NumberLiteral */ && !(t & 256 /* EnumLiteral */) &&
+                source.value === target.value)
+                return true;
+            if (s & 136 /* BooleanLike */ && t & 8 /* Boolean */)
+                return true;
+            if (s & 16 /* Enum */ && t & 16 /* Enum */ && isEnumTypeRelatedTo(source.symbol, target.symbol, errorReporter))
+                return true;
+            if (s & 256 /* EnumLiteral */ && t & 256 /* EnumLiteral */) {
+                if (s & 65536 /* Union */ && t & 65536 /* Union */ && isEnumTypeRelatedTo(source.symbol, target.symbol, errorReporter))
+                    return true;
+                if (s & 224 /* Literal */ && t & 224 /* Literal */ &&
+                    source.value === target.value &&
+                    isEnumTypeRelatedTo(getParentOfSymbol(source.symbol), getParentOfSymbol(target.symbol), errorReporter))
+                    return true;
             }
-            if (flags === 16 /* Protected */) {
-                return "protected";
+            if (s & 2048 /* Undefined */ && (!strictNullChecks || t & (2048 /* Undefined */ | 1024 /* Void */)))
+                return true;
+            if (s & 4096 /* Null */ && (!strictNullChecks || t & 4096 /* Null */))
+                return true;
+            if (s & 32768 /* Object */ && t & 16777216 /* NonPrimitive */)
+                return true;
+            if (relation === assignableRelation || relation === comparableRelation) {
+                if (s & 1 /* Any */)
+                    return true;
+                // Type number or any numeric literal type is assignable to any numeric enum type or any
+                // numeric enum literal type. This rule exists for backwards compatibility reasons because
+                // bit-flag enum types sometimes look like literal enum types with numeric literal values.
+                if (s & (4 /* Number */ | 64 /* NumberLiteral */) && !(s & 256 /* EnumLiteral */) && (t & 16 /* Enum */ || t & 64 /* NumberLiteral */ && t & 256 /* EnumLiteral */))
+                    return true;
             }
-            return "public";
+            return false;
         }
-        function getTypeAliasForTypeLiteral(type) {
-            if (type.symbol && type.symbol.flags & 2048 /* TypeLiteral */) {
-                var node = type.symbol.declarations[0].parent;
-                while (node.kind === 164 /* ParenthesizedType */) {
-                    node = node.parent;
-                }
-                if (node.kind === 223 /* TypeAliasDeclaration */) {
-                    return getSymbolOfNode(node);
+        function isTypeRelatedTo(source, target, relation) {
+            if (source.flags & 96 /* StringOrNumberLiteral */ && source.flags & 1048576 /* FreshLiteral */) {
+                source = source.regularType;
+            }
+            if (target.flags & 96 /* StringOrNumberLiteral */ && target.flags & 1048576 /* FreshLiteral */) {
+                target = target.regularType;
+            }
+            if (source === target || relation !== identityRelation && isSimpleTypeRelatedTo(source, target, relation)) {
+                return true;
+            }
+            if (source.flags & 32768 /* Object */ && target.flags & 32768 /* Object */) {
+                var id = relation !== identityRelation || source.id < target.id ? source.id + "," + target.id : target.id + "," + source.id;
+                var related = relation.get(id);
+                if (related !== undefined) {
+                    return related === 1 /* Succeeded */;
                 }
             }
-            return undefined;
-        }
-        function isTopLevelInExternalModuleAugmentation(node) {
-            return node && node.parent &&
-                node.parent.kind === 226 /* ModuleBlock */ &&
-                ts.isExternalModuleAugmentation(node.parent.parent);
-        }
-        function literalTypeToString(type) {
-            return type.flags & 32 /* StringLiteral */ ? "\"" + ts.escapeString(type.text) + "\"" : type.text;
+            if (source.flags & 1032192 /* StructuredOrTypeVariable */ || target.flags & 1032192 /* StructuredOrTypeVariable */) {
+                return checkTypeRelatedTo(source, target, relation, /*errorNode*/ undefined);
+            }
+            return false;
         }
-        function getSymbolDisplayBuilder() {
-            function getNameOfSymbol(symbol) {
-                if (symbol.declarations && symbol.declarations.length) {
-                    var declaration = symbol.declarations[0];
-                    if (declaration.name) {
-                        return ts.declarationNameToString(declaration.name);
+        /**
+         * Checks if 'source' is related to 'target' (e.g.: is a assignable to).
+         * @param source The left-hand-side of the relation.
+         * @param target The right-hand-side of the relation.
+         * @param relation The relation considered. One of 'identityRelation', 'subtypeRelation', 'assignableRelation', or 'comparableRelation'.
+         * Used as both to determine which checks are performed and as a cache of previously computed results.
+         * @param errorNode The suggested node upon which all errors will be reported, if defined. This may or may not be the actual node used.
+         * @param headMessage If the error chain should be prepended by a head message, then headMessage will be used.
+         * @param containingMessageChain A chain of errors to prepend any new errors found.
+         */
+        function checkTypeRelatedTo(source, target, relation, errorNode, headMessage, containingMessageChain) {
+            var errorInfo;
+            var sourceStack;
+            var targetStack;
+            var maybeStack;
+            var expandingFlags;
+            var depth = 0;
+            var overflow = false;
+            var isIntersectionConstituent = false;
+            ts.Debug.assert(relation !== identityRelation || !errorNode, "no error reporting in identity checking");
+            var result = isRelatedTo(source, target, /*reportErrors*/ !!errorNode, headMessage);
+            if (overflow) {
+                error(errorNode, ts.Diagnostics.Excessive_stack_depth_comparing_types_0_and_1, typeToString(source), typeToString(target));
+            }
+            else if (errorInfo) {
+                if (containingMessageChain) {
+                    errorInfo = ts.concatenateDiagnosticMessageChains(containingMessageChain, errorInfo);
+                }
+                diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(errorNode, errorInfo));
+            }
+            return result !== 0 /* False */;
+            function reportError(message, arg0, arg1, arg2) {
+                ts.Debug.assert(!!errorNode);
+                errorInfo = ts.chainDiagnosticMessages(errorInfo, message, arg0, arg1, arg2);
+            }
+            function reportRelationError(message, source, target) {
+                var sourceType = typeToString(source);
+                var targetType = typeToString(target);
+                if (sourceType === targetType) {
+                    sourceType = typeToString(source, /*enclosingDeclaration*/ undefined, 256 /* UseFullyQualifiedType */);
+                    targetType = typeToString(target, /*enclosingDeclaration*/ undefined, 256 /* UseFullyQualifiedType */);
+                }
+                if (!message) {
+                    if (relation === comparableRelation) {
+                        message = ts.Diagnostics.Type_0_is_not_comparable_to_type_1;
                     }
-                    switch (declaration.kind) {
-                        case 192 /* ClassExpression */:
-                            return "(Anonymous class)";
-                        case 179 /* FunctionExpression */:
-                        case 180 /* ArrowFunction */:
-                            return "(Anonymous function)";
+                    else if (sourceType === targetType) {
+                        message = ts.Diagnostics.Type_0_is_not_assignable_to_type_1_Two_different_types_with_this_name_exist_but_they_are_unrelated;
+                    }
+                    else {
+                        message = ts.Diagnostics.Type_0_is_not_assignable_to_type_1;
                     }
                 }
-                return symbol.name;
+                reportError(message, sourceType, targetType);
             }
-            /**
-             * Writes only the name of the symbol out to the writer. Uses the original source text
-             * for the name of the symbol if it is available to match how the user wrote the name.
-             */
-            function appendSymbolNameOnly(symbol, writer) {
-                writer.writeSymbol(getNameOfSymbol(symbol), symbol);
+            function tryElaborateErrorsForPrimitivesAndObjects(source, target) {
+                var sourceType = typeToString(source);
+                var targetType = typeToString(target);
+                if ((globalStringType === source && stringType === target) ||
+                    (globalNumberType === source && numberType === target) ||
+                    (globalBooleanType === source && booleanType === target) ||
+                    (getGlobalESSymbolType(/*reportErrors*/ false) === source && esSymbolType === target)) {
+                    reportError(ts.Diagnostics._0_is_a_primitive_but_1_is_a_wrapper_object_Prefer_using_0_when_possible, targetType, sourceType);
+                }
+            }
+            function isUnionOrIntersectionTypeWithoutNullableConstituents(type) {
+                if (!(type.flags & 196608 /* UnionOrIntersection */)) {
+                    return false;
+                }
+                // at this point we know that this is union or intersection type possibly with nullable constituents.
+                // check if we still will have compound type if we ignore nullable components.
+                var seenNonNullable = false;
+                for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                    var t = _a[_i];
+                    if (t.flags & 6144 /* Nullable */) {
+                        continue;
+                    }
+                    if (seenNonNullable) {
+                        return true;
+                    }
+                    seenNonNullable = true;
+                }
+                return false;
             }
             /**
-             * Writes a property access or element access with the name of the symbol out to the writer.
-             * Uses the original source text for the name of the symbol if it is available to match how the user wrote the name,
-             * ensuring that any names written with literals use element accesses.
+             * Compare two types and return
+             * * Ternary.True if they are related with no assumptions,
+             * * Ternary.Maybe if they are related with assumptions of other relationships, or
+             * * Ternary.False if they are not related.
              */
-            function appendPropertyOrElementAccessForSymbol(symbol, writer) {
-                var symbolName = getNameOfSymbol(symbol);
-                var firstChar = symbolName.charCodeAt(0);
-                var needsElementAccess = !ts.isIdentifierStart(firstChar, languageVersion);
-                if (needsElementAccess) {
-                    writePunctuation(writer, 19 /* OpenBracketToken */);
-                    if (ts.isSingleOrDoubleQuote(firstChar)) {
-                        writer.writeStringLiteral(symbolName);
+            function isRelatedTo(source, target, reportErrors, headMessage) {
+                if (source.flags & 96 /* StringOrNumberLiteral */ && source.flags & 1048576 /* FreshLiteral */) {
+                    source = source.regularType;
+                }
+                if (target.flags & 96 /* StringOrNumberLiteral */ && target.flags & 1048576 /* FreshLiteral */) {
+                    target = target.regularType;
+                }
+                // both types are the same - covers 'they are the same primitive type or both are Any' or the same type parameter cases
+                if (source === target)
+                    return -1 /* True */;
+                if (relation === identityRelation) {
+                    return isIdenticalTo(source, target);
+                }
+                if (isSimpleTypeRelatedTo(source, target, relation, reportErrors ? reportError : undefined))
+                    return -1 /* True */;
+                if (getObjectFlags(source) & 128 /* ObjectLiteral */ && source.flags & 1048576 /* FreshLiteral */) {
+                    if (hasExcessProperties(source, target, reportErrors)) {
+                        if (reportErrors) {
+                            reportRelationError(headMessage, source, target);
+                        }
+                        return 0 /* False */;
                     }
-                    else {
-                        writer.writeSymbol(symbolName, symbol);
+                    // Above we check for excess properties with respect to the entire target type. When union
+                    // and intersection types are further deconstructed on the target side, we don't want to
+                    // make the check again (as it might fail for a partial target type). Therefore we obtain
+                    // the regular source type and proceed with that.
+                    if (isUnionOrIntersectionTypeWithoutNullableConstituents(target)) {
+                        source = getRegularTypeOfObjectLiteral(source);
+                    }
+                }
+                if (relation !== comparableRelation &&
+                    !(source.flags & 196608 /* UnionOrIntersection */) &&
+                    !(target.flags & 65536 /* Union */) &&
+                    !isIntersectionConstituent &&
+                    source !== globalObjectType &&
+                    getPropertiesOfType(source).length > 0 &&
+                    isWeakType(target) &&
+                    !hasCommonProperties(source, target)) {
+                    if (reportErrors) {
+                        reportError(ts.Diagnostics.Type_0_has_no_properties_in_common_with_type_1, typeToString(source), typeToString(target));
                     }
-                    writePunctuation(writer, 20 /* CloseBracketToken */);
+                    return 0 /* False */;
+                }
+                var result = 0 /* False */;
+                var saveErrorInfo = errorInfo;
+                var saveIsIntersectionConstituent = isIntersectionConstituent;
+                isIntersectionConstituent = false;
+                // Note that these checks are specifically ordered to produce correct results. In particular,
+                // we need to deconstruct unions before intersections (because unions are always at the top),
+                // and we need to handle "each" relations before "some" relations for the same kind of type.
+                if (source.flags & 65536 /* Union */) {
+                    result = relation === comparableRelation ?
+                        someTypeRelatedToType(source, target, reportErrors && !(source.flags & 8190 /* Primitive */)) :
+                        eachTypeRelatedToType(source, target, reportErrors && !(source.flags & 8190 /* Primitive */));
                 }
                 else {
-                    writePunctuation(writer, 21 /* DotToken */);
-                    writer.writeSymbol(symbolName, symbol);
+                    if (target.flags & 65536 /* Union */) {
+                        result = typeRelatedToSomeType(source, target, reportErrors && !(source.flags & 8190 /* Primitive */) && !(target.flags & 8190 /* Primitive */));
+                    }
+                    else if (target.flags & 131072 /* Intersection */) {
+                        isIntersectionConstituent = true;
+                        result = typeRelatedToEachType(source, target, reportErrors);
+                    }
+                    else if (source.flags & 131072 /* Intersection */) {
+                        // Check to see if any constituents of the intersection are immediately related to the target.
+                        //
+                        // Don't report errors though. Checking whether a constituent is related to the source is not actually
+                        // useful and leads to some confusing error messages. Instead it is better to let the below checks
+                        // take care of this, or to not elaborate at all. For instance,
+                        //
+                        //    - For an object type (such as 'C = A & B'), users are usually more interested in structural errors.
+                        //
+                        //    - For a union type (such as '(A | B) = (C & D)'), it's better to hold onto the whole intersection
+                        //          than to report that 'D' is not assignable to 'A' or 'B'.
+                        //
+                        //    - For a primitive type or type parameter (such as 'number = A & B') there is no point in
+                        //          breaking the intersection apart.
+                        result = someTypeRelatedToType(source, target, /*reportErrors*/ false);
+                    }
+                    if (!result && (source.flags & 1032192 /* StructuredOrTypeVariable */ || target.flags & 1032192 /* StructuredOrTypeVariable */)) {
+                        if (result = recursiveTypeRelatedTo(source, target, reportErrors)) {
+                            errorInfo = saveErrorInfo;
+                        }
+                    }
+                }
+                isIntersectionConstituent = saveIsIntersectionConstituent;
+                if (!result && reportErrors) {
+                    if (source.flags & 32768 /* Object */ && target.flags & 8190 /* Primitive */) {
+                        tryElaborateErrorsForPrimitivesAndObjects(source, target);
+                    }
+                    else if (source.symbol && source.flags & 32768 /* Object */ && globalObjectType === source) {
+                        reportError(ts.Diagnostics.The_Object_type_is_assignable_to_very_few_other_types_Did_you_mean_to_use_the_any_type_instead);
+                    }
+                    reportRelationError(headMessage, source, target);
+                }
+                return result;
+            }
+            function isIdenticalTo(source, target) {
+                var result;
+                if (source.flags & 32768 /* Object */ && target.flags & 32768 /* Object */) {
+                    return recursiveTypeRelatedTo(source, target, /*reportErrors*/ false);
+                }
+                if (source.flags & 65536 /* Union */ && target.flags & 65536 /* Union */ ||
+                    source.flags & 131072 /* Intersection */ && target.flags & 131072 /* Intersection */) {
+                    if (result = eachTypeRelatedToSomeType(source, target)) {
+                        if (result &= eachTypeRelatedToSomeType(target, source)) {
+                            return result;
+                        }
+                    }
                 }
+                return 0 /* False */;
             }
-            /**
-             * Enclosing declaration is optional when we don't want to get qualified name in the enclosing declaration scope
-             * Meaning needs to be specified if the enclosing declaration is given
-             */
-            function buildSymbolDisplay(symbol, writer, enclosingDeclaration, meaning, flags, typeFlags) {
-                var parentSymbol;
-                function appendParentTypeArgumentsAndSymbolName(symbol) {
-                    if (parentSymbol) {
-                        // Write type arguments of instantiated class/interface here
-                        if (flags & 1 /* WriteTypeParametersOrArguments */) {
-                            if (symbol.flags & 16777216 /* Instantiated */) {
-                                buildDisplayForTypeArgumentsAndDelimiters(getTypeParametersOfClassOrInterface(parentSymbol), symbol.mapper, writer, enclosingDeclaration);
+            function hasExcessProperties(source, target, reportErrors) {
+                if (maybeTypeOfKind(target, 32768 /* Object */) && !(getObjectFlags(target) & 512 /* ObjectLiteralPatternWithComputedProperties */)) {
+                    var isComparingJsxAttributes = !!(source.flags & 33554432 /* JsxAttributes */);
+                    if ((relation === assignableRelation || relation === comparableRelation) &&
+                        (isTypeSubsetOf(globalObjectType, target) || (!isComparingJsxAttributes && isEmptyObjectType(target)))) {
+                        return false;
+                    }
+                    var _loop_4 = function (prop) {
+                        if (!isKnownProperty(target, prop.name, isComparingJsxAttributes)) {
+                            if (reportErrors) {
+                                // We know *exactly* where things went wrong when comparing the types.
+                                // Use this property as the error node as this will be more helpful in
+                                // reasoning about what went wrong.
+                                ts.Debug.assert(!!errorNode);
+                                if (ts.isJsxAttributes(errorNode) || ts.isJsxOpeningLikeElement(errorNode)) {
+                                    // JsxAttributes has an object-literal flag and undergo same type-assignablity check as normal object-literal.
+                                    // However, using an object-literal error message will be very confusing to the users so we give different a message.
+                                    reportError(ts.Diagnostics.Property_0_does_not_exist_on_type_1, symbolToString(prop), typeToString(target));
+                                }
+                                else {
+                                    // use the property's value declaration if the property is assigned inside the literal itself
+                                    var objectLiteralDeclaration_1 = source.symbol && ts.firstOrUndefined(source.symbol.declarations);
+                                    if (prop.valueDeclaration && ts.findAncestor(prop.valueDeclaration, function (d) { return d === objectLiteralDeclaration_1; })) {
+                                        errorNode = prop.valueDeclaration;
+                                    }
+                                    reportError(ts.Diagnostics.Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1, symbolToString(prop), typeToString(target));
+                                }
                             }
-                            else {
-                                buildTypeParameterDisplayFromSymbol(parentSymbol, writer, enclosingDeclaration);
+                            return { value: true };
+                        }
+                    };
+                    for (var _i = 0, _a = getPropertiesOfObjectType(source); _i < _a.length; _i++) {
+                        var prop = _a[_i];
+                        var state_2 = _loop_4(prop);
+                        if (typeof state_2 === "object")
+                            return state_2.value;
+                    }
+                }
+                return false;
+            }
+            function eachTypeRelatedToSomeType(source, target) {
+                var result = -1 /* True */;
+                var sourceTypes = source.types;
+                for (var _i = 0, sourceTypes_1 = sourceTypes; _i < sourceTypes_1.length; _i++) {
+                    var sourceType = sourceTypes_1[_i];
+                    var related = typeRelatedToSomeType(sourceType, target, /*reportErrors*/ false);
+                    if (!related) {
+                        return 0 /* False */;
+                    }
+                    result &= related;
+                }
+                return result;
+            }
+            function typeRelatedToSomeType(source, target, reportErrors) {
+                var targetTypes = target.types;
+                if (target.flags & 65536 /* Union */ && containsType(targetTypes, source)) {
+                    return -1 /* True */;
+                }
+                for (var _i = 0, targetTypes_1 = targetTypes; _i < targetTypes_1.length; _i++) {
+                    var type = targetTypes_1[_i];
+                    var related = isRelatedTo(source, type, /*reportErrors*/ false);
+                    if (related) {
+                        return related;
+                    }
+                }
+                if (reportErrors) {
+                    var discriminantType = findMatchingDiscriminantType(source, target);
+                    isRelatedTo(source, discriminantType || targetTypes[targetTypes.length - 1], /*reportErrors*/ true);
+                }
+                return 0 /* False */;
+            }
+            function findMatchingDiscriminantType(source, target) {
+                var sourceProperties = getPropertiesOfObjectType(source);
+                if (sourceProperties) {
+                    for (var _i = 0, sourceProperties_1 = sourceProperties; _i < sourceProperties_1.length; _i++) {
+                        var sourceProperty = sourceProperties_1[_i];
+                        if (isDiscriminantProperty(target, sourceProperty.name)) {
+                            var sourceType = getTypeOfSymbol(sourceProperty);
+                            for (var _a = 0, _b = target.types; _a < _b.length; _a++) {
+                                var type = _b[_a];
+                                var targetType = getTypeOfPropertyOfType(type, sourceProperty.name);
+                                if (targetType && isRelatedTo(sourceType, targetType)) {
+                                    return type;
+                                }
                             }
                         }
-                        appendPropertyOrElementAccessForSymbol(symbol, writer);
+                    }
+                }
+            }
+            function typeRelatedToEachType(source, target, reportErrors) {
+                var result = -1 /* True */;
+                var targetTypes = target.types;
+                for (var _i = 0, targetTypes_2 = targetTypes; _i < targetTypes_2.length; _i++) {
+                    var targetType = targetTypes_2[_i];
+                    var related = isRelatedTo(source, targetType, reportErrors);
+                    if (!related) {
+                        return 0 /* False */;
+                    }
+                    result &= related;
+                }
+                return result;
+            }
+            function someTypeRelatedToType(source, target, reportErrors) {
+                var sourceTypes = source.types;
+                if (source.flags & 65536 /* Union */ && containsType(sourceTypes, target)) {
+                    return -1 /* True */;
+                }
+                var len = sourceTypes.length;
+                for (var i = 0; i < len; i++) {
+                    var related = isRelatedTo(sourceTypes[i], target, reportErrors && i === len - 1);
+                    if (related) {
+                        return related;
+                    }
+                }
+                return 0 /* False */;
+            }
+            function eachTypeRelatedToType(source, target, reportErrors) {
+                var result = -1 /* True */;
+                var sourceTypes = source.types;
+                for (var _i = 0, sourceTypes_2 = sourceTypes; _i < sourceTypes_2.length; _i++) {
+                    var sourceType = sourceTypes_2[_i];
+                    var related = isRelatedTo(sourceType, target, reportErrors);
+                    if (!related) {
+                        return 0 /* False */;
+                    }
+                    result &= related;
+                }
+                return result;
+            }
+            function typeArgumentsRelatedTo(source, target, reportErrors) {
+                var sources = source.typeArguments || emptyArray;
+                var targets = target.typeArguments || emptyArray;
+                if (sources.length !== targets.length && relation === identityRelation) {
+                    return 0 /* False */;
+                }
+                var length = sources.length <= targets.length ? sources.length : targets.length;
+                var result = -1 /* True */;
+                for (var i = 0; i < length; i++) {
+                    var related = isRelatedTo(sources[i], targets[i], reportErrors);
+                    if (!related) {
+                        return 0 /* False */;
+                    }
+                    result &= related;
+                }
+                return result;
+            }
+            // Determine if possibly recursive types are related. First, check if the result is already available in the global cache.
+            // Second, check if we have already started a comparison of the given two types in which case we assume the result to be true.
+            // Third, check if both types are part of deeply nested chains of generic type instantiations and if so assume the types are
+            // equal and infinitely expanding. Fourth, if we have reached a depth of 100 nested comparisons, assume we have runaway recursion
+            // and issue an error. Otherwise, actually compare the structure of the two types.
+            function recursiveTypeRelatedTo(source, target, reportErrors) {
+                if (overflow) {
+                    return 0 /* False */;
+                }
+                var id = relation !== identityRelation || source.id < target.id ? source.id + "," + target.id : target.id + "," + source.id;
+                var related = relation.get(id);
+                if (related !== undefined) {
+                    if (reportErrors && related === 2 /* Failed */) {
+                        // We are elaborating errors and the cached result is an unreported failure. Record the result as a reported
+                        // failure and continue computing the relation such that errors get reported.
+                        relation.set(id, 3 /* FailedAndReported */);
                     }
                     else {
-                        appendSymbolNameOnly(symbol, writer);
+                        return related === 1 /* Succeeded */ ? -1 /* True */ : 0 /* False */;
                     }
-                    parentSymbol = symbol;
                 }
-                // Let the writer know we just wrote out a symbol.  The declaration emitter writer uses
-                // this to determine if an import it has previously seen (and not written out) needs
-                // to be written to the file once the walk of the tree is complete.
-                //
-                // NOTE(cyrusn): This approach feels somewhat unfortunate.  A simple pass over the tree
-                // up front (for example, during checking) could determine if we need to emit the imports
-                // and we could then access that data during declaration emit.
-                writer.trackSymbol(symbol, enclosingDeclaration, meaning);
-                /** @param endOfChain Set to false for recursive calls; non-recursive calls should always output something. */
-                function walkSymbol(symbol, meaning, endOfChain) {
-                    var accessibleSymbolChain = getAccessibleSymbolChain(symbol, enclosingDeclaration, meaning, !!(flags & 2 /* UseOnlyExternalAliasing */));
-                    if (!accessibleSymbolChain ||
-                        needsQualification(accessibleSymbolChain[0], enclosingDeclaration, accessibleSymbolChain.length === 1 ? meaning : getQualifiedLeftMeaning(meaning))) {
-                        // Go up and add our parent.
-                        var parent_8 = getParentOfSymbol(accessibleSymbolChain ? accessibleSymbolChain[0] : symbol);
-                        if (parent_8) {
-                            walkSymbol(parent_8, getQualifiedLeftMeaning(meaning), /*endOfChain*/ false);
-                        }
-                    }
-                    if (accessibleSymbolChain) {
-                        for (var _i = 0, accessibleSymbolChain_1 = accessibleSymbolChain; _i < accessibleSymbolChain_1.length; _i++) {
-                            var accessibleSymbol = accessibleSymbolChain_1[_i];
-                            appendParentTypeArgumentsAndSymbolName(accessibleSymbol);
+                if (depth > 0) {
+                    for (var i = 0; i < depth; i++) {
+                        // If source and target are already being compared, consider them related with assumptions
+                        if (maybeStack[i].get(id)) {
+                            return 1 /* Maybe */;
                         }
                     }
-                    else if (
-                    // If this is the last part of outputting the symbol, always output. The cases apply only to parent symbols.
-                    endOfChain ||
-                        // If a parent symbol is an external module, don't write it. (We prefer just `x` vs `"foo/bar".x`.)
-                        !(!parentSymbol && ts.forEach(symbol.declarations, hasExternalModuleSymbol)) &&
-                            // If a parent symbol is an anonymous type, don't write it.
-                            !(symbol.flags & (2048 /* TypeLiteral */ | 4096 /* ObjectLiteral */))) {
-                        appendParentTypeArgumentsAndSymbolName(symbol);
+                    if (depth === 100) {
+                        overflow = true;
+                        return 0 /* False */;
                     }
                 }
-                // Get qualified name if the symbol is not a type parameter
-                // and there is an enclosing declaration or we specifically
-                // asked for it
-                var isTypeParameter = symbol.flags & 262144 /* TypeParameter */;
-                var typeFormatFlag = 128 /* UseFullyQualifiedType */ & typeFlags;
-                if (!isTypeParameter && (enclosingDeclaration || typeFormatFlag)) {
-                    walkSymbol(symbol, meaning, /*endOfChain*/ true);
+                else {
+                    sourceStack = [];
+                    targetStack = [];
+                    maybeStack = [];
+                    expandingFlags = 0;
+                }
+                sourceStack[depth] = source;
+                targetStack[depth] = target;
+                maybeStack[depth] = ts.createMap();
+                maybeStack[depth].set(id, 1 /* Succeeded */);
+                depth++;
+                var saveExpandingFlags = expandingFlags;
+                if (!(expandingFlags & 1) && isDeeplyNestedType(source, sourceStack, depth))
+                    expandingFlags |= 1;
+                if (!(expandingFlags & 2) && isDeeplyNestedType(target, targetStack, depth))
+                    expandingFlags |= 2;
+                var result = expandingFlags !== 3 ? structuredTypeRelatedTo(source, target, reportErrors) : 1 /* Maybe */;
+                expandingFlags = saveExpandingFlags;
+                depth--;
+                if (result) {
+                    var maybeCache = maybeStack[depth];
+                    // If result is definitely true, copy assumptions to global cache, else copy to next level up
+                    var destinationCache = (result === -1 /* True */ || depth === 0) ? relation : maybeStack[depth - 1];
+                    ts.copyEntries(maybeCache, destinationCache);
                 }
                 else {
-                    appendParentTypeArgumentsAndSymbolName(symbol);
+                    // A false result goes straight into global cache (when something is false under assumptions it
+                    // will also be false without assumptions)
+                    relation.set(id, reportErrors ? 3 /* FailedAndReported */ : 2 /* Failed */);
                 }
+                return result;
             }
-            function buildTypeDisplay(type, writer, enclosingDeclaration, globalFlags, symbolStack) {
-                var globalFlagsToPass = globalFlags & 16 /* WriteOwnNameForAnyLike */;
-                var inObjectTypeLiteral = false;
-                return writeType(type, globalFlags);
-                function writeType(type, flags) {
-                    var nextFlags = flags & ~512 /* InTypeAlias */;
-                    // Write undefined/null type as any
-                    if (type.flags & 16015 /* Intrinsic */) {
-                        // Special handling for unknown / resolving types, they should show up as any and not unknown or __resolving
-                        writer.writeKeyword(!(globalFlags & 16 /* WriteOwnNameForAnyLike */) && isTypeAny(type)
-                            ? "any"
-                            : type.intrinsicName);
-                    }
-                    else if (type.flags & 268435456 /* ThisType */) {
-                        if (inObjectTypeLiteral) {
-                            writer.reportInaccessibleThisError();
-                        }
-                        writer.writeKeyword("this");
-                    }
-                    else if (type.flags & 131072 /* Reference */) {
-                        writeTypeReference(type, nextFlags);
-                    }
-                    else if (type.flags & 256 /* EnumLiteral */) {
-                        buildSymbolDisplay(getParentOfSymbol(type.symbol), writer, enclosingDeclaration, 793064 /* Type */, 0 /* None */, nextFlags);
-                        writePunctuation(writer, 21 /* DotToken */);
-                        appendSymbolNameOnly(type.symbol, writer);
-                    }
-                    else if (type.flags & (32768 /* Class */ | 65536 /* Interface */ | 16 /* Enum */ | 16384 /* TypeParameter */)) {
-                        // The specified symbol flags need to be reinterpreted as type flags
-                        buildSymbolDisplay(type.symbol, writer, enclosingDeclaration, 793064 /* Type */, 0 /* None */, nextFlags);
-                    }
-                    else if (!(flags & 512 /* InTypeAlias */) && type.flags & (2097152 /* Anonymous */ | 1572864 /* UnionOrIntersection */) && type.aliasSymbol &&
-                        isSymbolAccessible(type.aliasSymbol, enclosingDeclaration, 793064 /* Type */, /*shouldComputeAliasesToMakeVisible*/ false).accessibility === 0 /* Accessible */) {
-                        // Only write out inferred type with its corresponding type-alias if type-alias is visible
-                        var typeArguments = type.aliasTypeArguments;
-                        writeSymbolTypeReference(type.aliasSymbol, typeArguments, 0, typeArguments ? typeArguments.length : 0, nextFlags);
-                    }
-                    else if (type.flags & 1572864 /* UnionOrIntersection */) {
-                        writeUnionOrIntersectionType(type, nextFlags);
-                    }
-                    else if (type.flags & 2097152 /* Anonymous */) {
-                        writeAnonymousType(type, nextFlags);
-                    }
-                    else if (type.flags & 96 /* StringOrNumberLiteral */) {
-                        writer.writeStringLiteral(literalTypeToString(type));
-                    }
-                    else {
-                        // Should never get here
-                        // { ... }
-                        writePunctuation(writer, 15 /* OpenBraceToken */);
-                        writeSpace(writer);
-                        writePunctuation(writer, 22 /* DotDotDotToken */);
-                        writeSpace(writer);
-                        writePunctuation(writer, 16 /* CloseBraceToken */);
-                    }
-                }
-                function writeTypeList(types, delimiter) {
-                    for (var i = 0; i < types.length; i++) {
-                        if (i > 0) {
-                            if (delimiter !== 24 /* CommaToken */) {
-                                writeSpace(writer);
+            function structuredTypeRelatedTo(source, target, reportErrors) {
+                var result;
+                var saveErrorInfo = errorInfo;
+                if (target.flags & 16384 /* TypeParameter */) {
+                    // A source type { [P in keyof T]: X } is related to a target type T if X is related to T[P].
+                    if (getObjectFlags(source) & 32 /* Mapped */ && getConstraintTypeFromMappedType(source) === getIndexType(target)) {
+                        if (!source.declaration.questionToken) {
+                            var templateType = getTemplateTypeFromMappedType(source);
+                            var indexedAccessType = getIndexedAccessType(target, getTypeParameterFromMappedType(source));
+                            if (result = isRelatedTo(templateType, indexedAccessType, reportErrors)) {
+                                return result;
                             }
-                            writePunctuation(writer, delimiter);
-                            writeSpace(writer);
                         }
-                        writeType(types[i], delimiter === 24 /* CommaToken */ ? 0 /* None */ : 64 /* InElementType */);
                     }
                 }
-                function writeSymbolTypeReference(symbol, typeArguments, pos, end, flags) {
-                    // Unnamed function expressions and arrow functions have reserved names that we don't want to display
-                    if (symbol.flags & 32 /* Class */ || !isReservedMemberName(symbol.name)) {
-                        buildSymbolDisplay(symbol, writer, enclosingDeclaration, 793064 /* Type */, 0 /* None */, flags);
+                else if (target.flags & 262144 /* Index */) {
+                    // A keyof S is related to a keyof T if T is related to S.
+                    if (source.flags & 262144 /* Index */) {
+                        if (result = isRelatedTo(target.type, source.type, /*reportErrors*/ false)) {
+                            return result;
+                        }
                     }
-                    if (pos < end) {
-                        writePunctuation(writer, 25 /* LessThanToken */);
-                        writeType(typeArguments[pos], 256 /* InFirstTypeArgument */);
-                        pos++;
-                        while (pos < end) {
-                            writePunctuation(writer, 24 /* CommaToken */);
-                            writeSpace(writer);
-                            writeType(typeArguments[pos], 0 /* None */);
-                            pos++;
+                    // A type S is assignable to keyof T if S is assignable to keyof C, where C is the
+                    // constraint of T.
+                    var constraint = getConstraintOfType(target.type);
+                    if (constraint) {
+                        if (result = isRelatedTo(source, getIndexType(constraint), reportErrors)) {
+                            return result;
                         }
-                        writePunctuation(writer, 27 /* GreaterThanToken */);
                     }
                 }
-                function writeTypeReference(type, flags) {
-                    var typeArguments = type.typeArguments || emptyArray;
-                    if (type.target === globalArrayType && !(flags & 1 /* WriteArrayAsGenericType */)) {
-                        writeType(typeArguments[0], 64 /* InElementType */);
-                        writePunctuation(writer, 19 /* OpenBracketToken */);
-                        writePunctuation(writer, 20 /* CloseBracketToken */);
+                else if (target.flags & 524288 /* IndexedAccess */) {
+                    // A type S is related to a type T[K] if S is related to A[K], where K is string-like and
+                    // A is the apparent type of S.
+                    var constraint = getConstraintOfType(target);
+                    if (constraint) {
+                        if (result = isRelatedTo(source, constraint, reportErrors)) {
+                            errorInfo = saveErrorInfo;
+                            return result;
+                        }
                     }
-                    else if (type.target.flags & 262144 /* Tuple */) {
-                        writePunctuation(writer, 19 /* OpenBracketToken */);
-                        writeTypeList(type.typeArguments.slice(0, getTypeReferenceArity(type)), 24 /* CommaToken */);
-                        writePunctuation(writer, 20 /* CloseBracketToken */);
+                }
+                if (source.flags & 16384 /* TypeParameter */) {
+                    // A source type T is related to a target type { [P in keyof T]: X } if T[P] is related to X.
+                    if (getObjectFlags(target) & 32 /* Mapped */ && getConstraintTypeFromMappedType(target) === getIndexType(source)) {
+                        var indexedAccessType = getIndexedAccessType(source, getTypeParameterFromMappedType(target));
+                        var templateType = getTemplateTypeFromMappedType(target);
+                        if (result = isRelatedTo(indexedAccessType, templateType, reportErrors)) {
+                            errorInfo = saveErrorInfo;
+                            return result;
+                        }
                     }
                     else {
-                        // Write the type reference in the format f<A>.g<B>.C<X, Y> where A and B are type arguments
-                        // for outer type parameters, and f and g are the respective declaring containers of those
-                        // type parameters.
-                        var outerTypeParameters = type.target.outerTypeParameters;
-                        var i = 0;
-                        if (outerTypeParameters) {
-                            var length_1 = outerTypeParameters.length;
-                            while (i < length_1) {
-                                // Find group of type arguments for type parameters with the same declaring container.
-                                var start = i;
-                                var parent_9 = getParentSymbolOfTypeParameter(outerTypeParameters[i]);
-                                do {
-                                    i++;
-                                } while (i < length_1 && getParentSymbolOfTypeParameter(outerTypeParameters[i]) === parent_9);
-                                // When type parameters are their own type arguments for the whole group (i.e. we have
-                                // the default outer type arguments), we don't show the group.
-                                if (!ts.rangeEquals(outerTypeParameters, typeArguments, start, i)) {
-                                    writeSymbolTypeReference(parent_9, typeArguments, start, i, flags);
-                                    writePunctuation(writer, 21 /* DotToken */);
-                                }
+                        var constraint = getConstraintOfTypeParameter(source);
+                        // A type parameter with no constraint is not related to the non-primitive object type.
+                        if (constraint || !(target.flags & 16777216 /* NonPrimitive */)) {
+                            if (!constraint || constraint.flags & 1 /* Any */) {
+                                constraint = emptyObjectType;
+                            }
+                            // The constraint may need to be further instantiated with its 'this' type.
+                            constraint = getTypeWithThisArgument(constraint, source);
+                            // Report constraint errors only if the constraint is not the empty object type
+                            var reportConstraintErrors = reportErrors && constraint !== emptyObjectType;
+                            if (result = isRelatedTo(constraint, target, reportConstraintErrors)) {
+                                errorInfo = saveErrorInfo;
+                                return result;
                             }
                         }
-                        var typeParameterCount = (type.target.typeParameters || emptyArray).length;
-                        writeSymbolTypeReference(type.symbol, typeArguments, i, typeParameterCount, flags);
                     }
                 }
-                function writeUnionOrIntersectionType(type, flags) {
-                    if (flags & 64 /* InElementType */) {
-                        writePunctuation(writer, 17 /* OpenParenToken */);
-                    }
-                    if (type.flags & 524288 /* Union */) {
-                        writeTypeList(formatUnionTypes(type.types), 47 /* BarToken */);
-                    }
-                    else {
-                        writeTypeList(type.types, 46 /* AmpersandToken */);
+                else if (source.flags & 524288 /* IndexedAccess */) {
+                    // A type S[K] is related to a type T if A[K] is related to T, where K is string-like and
+                    // A is the apparent type of S.
+                    var constraint = getConstraintOfType(source);
+                    if (constraint) {
+                        if (result = isRelatedTo(constraint, target, reportErrors)) {
+                            errorInfo = saveErrorInfo;
+                            return result;
+                        }
                     }
-                    if (flags & 64 /* InElementType */) {
-                        writePunctuation(writer, 18 /* CloseParenToken */);
+                    else if (target.flags & 524288 /* IndexedAccess */ && source.indexType === target.indexType) {
+                        // if we have indexed access types with identical index types, see if relationship holds for
+                        // the two object types.
+                        if (result = isRelatedTo(source.objectType, target.objectType, reportErrors)) {
+                            return result;
+                        }
                     }
                 }
-                function writeAnonymousType(type, flags) {
-                    var symbol = type.symbol;
-                    if (symbol) {
-                        // Always use 'typeof T' for type of class, enum, and module objects
-                        if (symbol.flags & (32 /* Class */ | 384 /* Enum */ | 512 /* ValueModule */)) {
-                            writeTypeOfSymbol(type, flags);
-                        }
-                        else if (shouldWriteTypeOfFunctionSymbol()) {
-                            writeTypeOfSymbol(type, flags);
+                else {
+                    if (getObjectFlags(source) & 4 /* Reference */ && getObjectFlags(target) & 4 /* Reference */ && source.target === target.target) {
+                        // We have type references to same target type, see if relationship holds for all type arguments
+                        if (result = typeArgumentsRelatedTo(source, target, reportErrors)) {
+                            return result;
                         }
-                        else if (ts.contains(symbolStack, symbol)) {
-                            // If type is an anonymous type literal in a type alias declaration, use type alias name
-                            var typeAlias = getTypeAliasForTypeLiteral(type);
-                            if (typeAlias) {
-                                // The specified symbol flags need to be reinterpreted as type flags
-                                buildSymbolDisplay(typeAlias, writer, enclosingDeclaration, 793064 /* Type */, 0 /* None */, flags);
-                            }
-                            else {
-                                // Recursive usage, use any
-                                writeKeyword(writer, 117 /* AnyKeyword */);
-                            }
+                    }
+                    // Even if relationship doesn't hold for unions, intersections, or generic type references,
+                    // it may hold in a structural comparison.
+                    var sourceIsPrimitive = !!(source.flags & 8190 /* Primitive */);
+                    if (relation !== identityRelation) {
+                        source = getApparentType(source);
+                    }
+                    // In a check of the form X = A & B, we will have previously checked if A relates to X or B relates
+                    // to X. Failing both of those we want to check if the aggregation of A and B's members structurally
+                    // relates to X. Thus, we include intersection types on the source side here.
+                    if (source.flags & (32768 /* Object */ | 131072 /* Intersection */) && target.flags & 32768 /* Object */) {
+                        // Report structural errors only if we haven't reported any errors yet
+                        var reportStructuralErrors = reportErrors && errorInfo === saveErrorInfo && !sourceIsPrimitive;
+                        if (isGenericMappedType(source) || isGenericMappedType(target)) {
+                            result = mappedTypeRelatedTo(source, target, reportStructuralErrors);
                         }
                         else {
-                            // Since instantiations of the same anonymous type have the same symbol, tracking symbols instead
-                            // of types allows us to catch circular references to instantiations of the same anonymous type
-                            if (!symbolStack) {
-                                symbolStack = [];
+                            result = propertiesRelatedTo(source, target, reportStructuralErrors);
+                            if (result) {
+                                result &= signaturesRelatedTo(source, target, 0 /* Call */, reportStructuralErrors);
+                                if (result) {
+                                    result &= signaturesRelatedTo(source, target, 1 /* Construct */, reportStructuralErrors);
+                                    if (result) {
+                                        result &= indexTypesRelatedTo(source, target, 0 /* String */, sourceIsPrimitive, reportStructuralErrors);
+                                        if (result) {
+                                            result &= indexTypesRelatedTo(source, target, 1 /* Number */, sourceIsPrimitive, reportStructuralErrors);
+                                        }
+                                    }
+                                }
                             }
-                            symbolStack.push(symbol);
-                            writeLiteralType(type, flags);
-                            symbolStack.pop();
                         }
-                    }
-                    else {
-                        // Anonymous types with no symbol are never circular
-                        writeLiteralType(type, flags);
-                    }
-                    function shouldWriteTypeOfFunctionSymbol() {
-                        var isStaticMethodSymbol = !!(symbol.flags & 8192 /* Method */ &&
-                            ts.forEach(symbol.declarations, function (declaration) { return ts.getModifierFlags(declaration) & 32 /* Static */; }));
-                        var isNonLocalFunctionSymbol = !!(symbol.flags & 16 /* Function */) &&
-                            (symbol.parent ||
-                                ts.forEach(symbol.declarations, function (declaration) {
-                                    return declaration.parent.kind === 256 /* SourceFile */ || declaration.parent.kind === 226 /* ModuleBlock */;
-                                }));
-                        if (isStaticMethodSymbol || isNonLocalFunctionSymbol) {
-                            // typeof is allowed only for static/non local functions
-                            return !!(flags & 2 /* UseTypeOfFunction */) ||
-                                (ts.contains(symbolStack, symbol)); // it is type of the symbol uses itself recursively
+                        if (result) {
+                            errorInfo = saveErrorInfo;
+                            return result;
                         }
                     }
                 }
-                function writeTypeOfSymbol(type, typeFormatFlags) {
-                    writeKeyword(writer, 101 /* TypeOfKeyword */);
-                    writeSpace(writer);
-                    buildSymbolDisplay(type.symbol, writer, enclosingDeclaration, 107455 /* Value */, 0 /* None */, typeFormatFlags);
-                }
-                function writeIndexSignature(info, keyword) {
-                    if (info) {
-                        if (info.isReadonly) {
-                            writeKeyword(writer, 128 /* ReadonlyKeyword */);
-                            writeSpace(writer);
+                return 0 /* False */;
+            }
+            // A type [P in S]: X is related to a type [Q in T]: Y if T is related to S and X' is
+            // related to Y, where X' is an instantiation of X in which P is replaced with Q. Notice
+            // that S and T are contra-variant whereas X and Y are co-variant.
+            function mappedTypeRelatedTo(source, target, reportErrors) {
+                if (isGenericMappedType(target)) {
+                    if (isGenericMappedType(source)) {
+                        var sourceReadonly = !!source.declaration.readonlyToken;
+                        var sourceOptional = !!source.declaration.questionToken;
+                        var targetReadonly = !!target.declaration.readonlyToken;
+                        var targetOptional = !!target.declaration.questionToken;
+                        var modifiersRelated = relation === identityRelation ?
+                            sourceReadonly === targetReadonly && sourceOptional === targetOptional :
+                            relation === comparableRelation || !sourceOptional || targetOptional;
+                        if (modifiersRelated) {
+                            var result_2;
+                            if (result_2 = isRelatedTo(getConstraintTypeFromMappedType(target), getConstraintTypeFromMappedType(source), reportErrors)) {
+                                var mapper = createTypeMapper([getTypeParameterFromMappedType(source)], [getTypeParameterFromMappedType(target)]);
+                                return result_2 & isRelatedTo(instantiateType(getTemplateTypeFromMappedType(source), mapper), getTemplateTypeFromMappedType(target), reportErrors);
+                            }
                         }
-                        writePunctuation(writer, 19 /* OpenBracketToken */);
-                        writer.writeParameter(info.declaration ? ts.declarationNameToString(info.declaration.parameters[0].name) : "x");
-                        writePunctuation(writer, 54 /* ColonToken */);
-                        writeSpace(writer);
-                        writeKeyword(writer, keyword);
-                        writePunctuation(writer, 20 /* CloseBracketToken */);
-                        writePunctuation(writer, 54 /* ColonToken */);
-                        writeSpace(writer);
-                        writeType(info.type, 0 /* None */);
-                        writePunctuation(writer, 23 /* SemicolonToken */);
-                        writer.writeLine();
-                    }
-                }
-                function writePropertyWithModifiers(prop) {
-                    if (isReadonlySymbol(prop)) {
-                        writeKeyword(writer, 128 /* ReadonlyKeyword */);
-                        writeSpace(writer);
                     }
-                    buildSymbolDisplay(prop, writer);
-                    if (prop.flags & 536870912 /* Optional */) {
-                        writePunctuation(writer, 53 /* QuestionToken */);
+                    else if (target.declaration.questionToken && isEmptyObjectType(source)) {
+                        return -1 /* True */;
                     }
                 }
-                function shouldAddParenthesisAroundFunctionType(callSignature, flags) {
-                    if (flags & 64 /* InElementType */) {
-                        return true;
-                    }
-                    else if (flags & 256 /* InFirstTypeArgument */) {
-                        // Add parenthesis around function type for the first type argument to avoid ambiguity
-                        var typeParameters = callSignature.target && (flags & 32 /* WriteTypeArgumentsOfSignature */) ?
-                            callSignature.target.typeParameters : callSignature.typeParameters;
-                        return typeParameters && typeParameters.length !== 0;
+                else if (relation !== identityRelation) {
+                    var resolved = resolveStructuredTypeMembers(target);
+                    if (isEmptyResolvedType(resolved) || resolved.stringIndexInfo && resolved.stringIndexInfo.type.flags & 1 /* Any */) {
+                        return -1 /* True */;
                     }
-                    return false;
                 }
-                function writeLiteralType(type, flags) {
-                    var resolved = resolveStructuredTypeMembers(type);
-                    if (!resolved.properties.length && !resolved.stringIndexInfo && !resolved.numberIndexInfo) {
-                        if (!resolved.callSignatures.length && !resolved.constructSignatures.length) {
-                            writePunctuation(writer, 15 /* OpenBraceToken */);
-                            writePunctuation(writer, 16 /* CloseBraceToken */);
-                            return;
+                return 0 /* False */;
+            }
+            function propertiesRelatedTo(source, target, reportErrors) {
+                if (relation === identityRelation) {
+                    return propertiesIdenticalTo(source, target);
+                }
+                var result = -1 /* True */;
+                var properties = getPropertiesOfObjectType(target);
+                var requireOptionalProperties = relation === subtypeRelation && !(getObjectFlags(source) & 128 /* ObjectLiteral */);
+                for (var _i = 0, properties_3 = properties; _i < properties_3.length; _i++) {
+                    var targetProp = properties_3[_i];
+                    var sourceProp = getPropertyOfType(source, targetProp.name);
+                    if (sourceProp !== targetProp) {
+                        if (!sourceProp) {
+                            if (!(targetProp.flags & 67108864 /* Optional */) || requireOptionalProperties) {
+                                if (reportErrors) {
+                                    reportError(ts.Diagnostics.Property_0_is_missing_in_type_1, symbolToString(targetProp), typeToString(source));
+                                }
+                                return 0 /* False */;
+                            }
                         }
-                        if (resolved.callSignatures.length === 1 && !resolved.constructSignatures.length) {
-                            var parenthesizeSignature = shouldAddParenthesisAroundFunctionType(resolved.callSignatures[0], flags);
-                            if (parenthesizeSignature) {
-                                writePunctuation(writer, 17 /* OpenParenToken */);
+                        else if (!(targetProp.flags & 16777216 /* Prototype */)) {
+                            var sourcePropFlags = ts.getDeclarationModifierFlagsFromSymbol(sourceProp);
+                            var targetPropFlags = ts.getDeclarationModifierFlagsFromSymbol(targetProp);
+                            if (sourcePropFlags & 8 /* Private */ || targetPropFlags & 8 /* Private */) {
+                                if (ts.getCheckFlags(sourceProp) & 256 /* ContainsPrivate */) {
+                                    if (reportErrors) {
+                                        reportError(ts.Diagnostics.Property_0_has_conflicting_declarations_and_is_inaccessible_in_type_1, symbolToString(sourceProp), typeToString(source));
+                                    }
+                                    return 0 /* False */;
+                                }
+                                if (sourceProp.valueDeclaration !== targetProp.valueDeclaration) {
+                                    if (reportErrors) {
+                                        if (sourcePropFlags & 8 /* Private */ && targetPropFlags & 8 /* Private */) {
+                                            reportError(ts.Diagnostics.Types_have_separate_declarations_of_a_private_property_0, symbolToString(targetProp));
+                                        }
+                                        else {
+                                            reportError(ts.Diagnostics.Property_0_is_private_in_type_1_but_not_in_type_2, symbolToString(targetProp), typeToString(sourcePropFlags & 8 /* Private */ ? source : target), typeToString(sourcePropFlags & 8 /* Private */ ? target : source));
+                                        }
+                                    }
+                                    return 0 /* False */;
+                                }
                             }
-                            buildSignatureDisplay(resolved.callSignatures[0], writer, enclosingDeclaration, globalFlagsToPass | 8 /* WriteArrowStyleSignature */, /*kind*/ undefined, symbolStack);
-                            if (parenthesizeSignature) {
-                                writePunctuation(writer, 18 /* CloseParenToken */);
+                            else if (targetPropFlags & 16 /* Protected */) {
+                                if (!isValidOverrideOf(sourceProp, targetProp)) {
+                                    if (reportErrors) {
+                                        reportError(ts.Diagnostics.Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2, symbolToString(targetProp), typeToString(getDeclaringClass(sourceProp) || source), typeToString(getDeclaringClass(targetProp) || target));
+                                    }
+                                    return 0 /* False */;
+                                }
                             }
-                            return;
-                        }
-                        if (resolved.constructSignatures.length === 1 && !resolved.callSignatures.length) {
-                            if (flags & 64 /* InElementType */) {
-                                writePunctuation(writer, 17 /* OpenParenToken */);
+                            else if (sourcePropFlags & 16 /* Protected */) {
+                                if (reportErrors) {
+                                    reportError(ts.Diagnostics.Property_0_is_protected_in_type_1_but_public_in_type_2, symbolToString(targetProp), typeToString(source), typeToString(target));
+                                }
+                                return 0 /* False */;
                             }
-                            writeKeyword(writer, 92 /* NewKeyword */);
-                            writeSpace(writer);
-                            buildSignatureDisplay(resolved.constructSignatures[0], writer, enclosingDeclaration, globalFlagsToPass | 8 /* WriteArrowStyleSignature */, /*kind*/ undefined, symbolStack);
-                            if (flags & 64 /* InElementType */) {
-                                writePunctuation(writer, 18 /* CloseParenToken */);
+                            var related = isRelatedTo(getTypeOfSymbol(sourceProp), getTypeOfSymbol(targetProp), reportErrors);
+                            if (!related) {
+                                if (reportErrors) {
+                                    reportError(ts.Diagnostics.Types_of_property_0_are_incompatible, symbolToString(targetProp));
+                                }
+                                return 0 /* False */;
                             }
-                            return;
-                        }
-                    }
-                    var saveInObjectTypeLiteral = inObjectTypeLiteral;
-                    inObjectTypeLiteral = true;
-                    writePunctuation(writer, 15 /* OpenBraceToken */);
-                    writer.writeLine();
-                    writer.increaseIndent();
-                    for (var _i = 0, _a = resolved.callSignatures; _i < _a.length; _i++) {
-                        var signature = _a[_i];
-                        buildSignatureDisplay(signature, writer, enclosingDeclaration, globalFlagsToPass, /*kind*/ undefined, symbolStack);
-                        writePunctuation(writer, 23 /* SemicolonToken */);
-                        writer.writeLine();
-                    }
-                    for (var _b = 0, _c = resolved.constructSignatures; _b < _c.length; _b++) {
-                        var signature = _c[_b];
-                        buildSignatureDisplay(signature, writer, enclosingDeclaration, globalFlagsToPass, 1 /* Construct */, symbolStack);
-                        writePunctuation(writer, 23 /* SemicolonToken */);
-                        writer.writeLine();
-                    }
-                    writeIndexSignature(resolved.stringIndexInfo, 132 /* StringKeyword */);
-                    writeIndexSignature(resolved.numberIndexInfo, 130 /* NumberKeyword */);
-                    for (var _d = 0, _e = resolved.properties; _d < _e.length; _d++) {
-                        var p = _e[_d];
-                        var t = getTypeOfSymbol(p);
-                        if (p.flags & (16 /* Function */ | 8192 /* Method */) && !getPropertiesOfObjectType(t).length) {
-                            var signatures = getSignaturesOfType(t, 0 /* Call */);
-                            for (var _f = 0, signatures_1 = signatures; _f < signatures_1.length; _f++) {
-                                var signature = signatures_1[_f];
-                                writePropertyWithModifiers(p);
-                                buildSignatureDisplay(signature, writer, enclosingDeclaration, globalFlagsToPass, /*kind*/ undefined, symbolStack);
-                                writePunctuation(writer, 23 /* SemicolonToken */);
-                                writer.writeLine();
+                            result &= related;
+                            // When checking for comparability, be more lenient with optional properties.
+                            if (relation !== comparableRelation && sourceProp.flags & 67108864 /* Optional */ && !(targetProp.flags & 67108864 /* Optional */)) {
+                                // TypeScript 1.0 spec (April 2014): 3.8.3
+                                // S is a subtype of a type T, and T is a supertype of S if ...
+                                // S' and T are object types and, for each member M in T..
+                                // M is a property and S' contains a property N where
+                                // if M is a required property, N is also a required property
+                                // (M - property in T)
+                                // (N - property in S)
+                                if (reportErrors) {
+                                    reportError(ts.Diagnostics.Property_0_is_optional_in_type_1_but_required_in_type_2, symbolToString(targetProp), typeToString(source), typeToString(target));
+                                }
+                                return 0 /* False */;
                             }
                         }
-                        else {
-                            writePropertyWithModifiers(p);
-                            writePunctuation(writer, 54 /* ColonToken */);
-                            writeSpace(writer);
-                            writeType(t, 0 /* None */);
-                            writePunctuation(writer, 23 /* SemicolonToken */);
-                            writer.writeLine();
-                        }
                     }
-                    writer.decreaseIndent();
-                    writePunctuation(writer, 16 /* CloseBraceToken */);
-                    inObjectTypeLiteral = saveInObjectTypeLiteral;
                 }
+                return result;
             }
-            function buildTypeParameterDisplayFromSymbol(symbol, writer, enclosingDeclaration, flags) {
-                var targetSymbol = getTargetSymbol(symbol);
-                if (targetSymbol.flags & 32 /* Class */ || targetSymbol.flags & 64 /* Interface */ || targetSymbol.flags & 524288 /* TypeAlias */) {
-                    buildDisplayForTypeParametersAndDelimiters(getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol), writer, enclosingDeclaration, flags);
+            /**
+             * A type is 'weak' if it is an object type with at least one optional property
+             * and no required properties, call/construct signatures or index signatures
+             */
+            function isWeakType(type) {
+                if (type.flags & 32768 /* Object */) {
+                    var resolved = resolveStructuredTypeMembers(type);
+                    return resolved.callSignatures.length === 0 && resolved.constructSignatures.length === 0 &&
+                        !resolved.stringIndexInfo && !resolved.numberIndexInfo &&
+                        resolved.properties.length > 0 &&
+                        ts.every(resolved.properties, function (p) { return !!(p.flags & 67108864 /* Optional */); });
                 }
-            }
-            function buildTypeParameterDisplay(tp, writer, enclosingDeclaration, flags, symbolStack) {
-                appendSymbolNameOnly(tp.symbol, writer);
-                var constraint = getConstraintOfTypeParameter(tp);
-                if (constraint) {
-                    writeSpace(writer);
-                    writeKeyword(writer, 83 /* ExtendsKeyword */);
-                    writeSpace(writer);
-                    buildTypeDisplay(constraint, writer, enclosingDeclaration, flags, symbolStack);
+                if (type.flags & 131072 /* Intersection */) {
+                    return ts.every(type.types, isWeakType);
                 }
+                return false;
             }
-            function buildParameterDisplay(p, writer, enclosingDeclaration, flags, symbolStack) {
-                var parameterNode = p.valueDeclaration;
-                if (ts.isRestParameter(parameterNode)) {
-                    writePunctuation(writer, 22 /* DotDotDotToken */);
+            function hasCommonProperties(source, target) {
+                var isComparingJsxAttributes = !!(source.flags & 33554432 /* JsxAttributes */);
+                for (var _i = 0, _a = getPropertiesOfType(source); _i < _a.length; _i++) {
+                    var prop = _a[_i];
+                    if (isKnownProperty(target, prop.name, isComparingJsxAttributes)) {
+                        return true;
+                    }
                 }
-                if (ts.isBindingPattern(parameterNode.name)) {
-                    buildBindingPatternDisplay(parameterNode.name, writer, enclosingDeclaration, flags, symbolStack);
+                return false;
+            }
+            function propertiesIdenticalTo(source, target) {
+                if (!(source.flags & 32768 /* Object */ && target.flags & 32768 /* Object */)) {
+                    return 0 /* False */;
                 }
-                else {
-                    appendSymbolNameOnly(p, writer);
+                var sourceProperties = getPropertiesOfObjectType(source);
+                var targetProperties = getPropertiesOfObjectType(target);
+                if (sourceProperties.length !== targetProperties.length) {
+                    return 0 /* False */;
                 }
-                if (isOptionalParameter(parameterNode)) {
-                    writePunctuation(writer, 53 /* QuestionToken */);
+                var result = -1 /* True */;
+                for (var _i = 0, sourceProperties_2 = sourceProperties; _i < sourceProperties_2.length; _i++) {
+                    var sourceProp = sourceProperties_2[_i];
+                    var targetProp = getPropertyOfObjectType(target, sourceProp.name);
+                    if (!targetProp) {
+                        return 0 /* False */;
+                    }
+                    var related = compareProperties(sourceProp, targetProp, isRelatedTo);
+                    if (!related) {
+                        return 0 /* False */;
+                    }
+                    result &= related;
                 }
-                writePunctuation(writer, 54 /* ColonToken */);
-                writeSpace(writer);
-                buildTypeDisplay(getTypeOfSymbol(p), writer, enclosingDeclaration, flags, symbolStack);
+                return result;
             }
-            function buildBindingPatternDisplay(bindingPattern, writer, enclosingDeclaration, flags, symbolStack) {
-                // We have to explicitly emit square bracket and bracket because these tokens are not stored inside the node.
-                if (bindingPattern.kind === 167 /* ObjectBindingPattern */) {
-                    writePunctuation(writer, 15 /* OpenBraceToken */);
-                    buildDisplayForCommaSeparatedList(bindingPattern.elements, writer, function (e) { return buildBindingElementDisplay(e, writer, enclosingDeclaration, flags, symbolStack); });
-                    writePunctuation(writer, 16 /* CloseBraceToken */);
+            function signaturesRelatedTo(source, target, kind, reportErrors) {
+                if (relation === identityRelation) {
+                    return signaturesIdenticalTo(source, target, kind);
                 }
-                else if (bindingPattern.kind === 168 /* ArrayBindingPattern */) {
-                    writePunctuation(writer, 19 /* OpenBracketToken */);
-                    var elements = bindingPattern.elements;
-                    buildDisplayForCommaSeparatedList(elements, writer, function (e) { return buildBindingElementDisplay(e, writer, enclosingDeclaration, flags, symbolStack); });
-                    if (elements && elements.hasTrailingComma) {
-                        writePunctuation(writer, 24 /* CommaToken */);
-                    }
-                    writePunctuation(writer, 20 /* CloseBracketToken */);
+                if (target === anyFunctionType || source === anyFunctionType) {
+                    return -1 /* True */;
                 }
-            }
-            function buildBindingElementDisplay(bindingElement, writer, enclosingDeclaration, flags, symbolStack) {
-                if (ts.isOmittedExpression(bindingElement)) {
-                    return;
+                var sourceSignatures = getSignaturesOfType(source, kind);
+                var targetSignatures = getSignaturesOfType(target, kind);
+                if (kind === 1 /* Construct */ && sourceSignatures.length && targetSignatures.length) {
+                    if (isAbstractConstructorType(source) && !isAbstractConstructorType(target)) {
+                        // An abstract constructor type is not assignable to a non-abstract constructor type
+                        // as it would otherwise be possible to new an abstract class. Note that the assignability
+                        // check we perform for an extends clause excludes construct signatures from the target,
+                        // so this check never proceeds.
+                        if (reportErrors) {
+                            reportError(ts.Diagnostics.Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type);
+                        }
+                        return 0 /* False */;
+                    }
+                    if (!constructorVisibilitiesAreCompatible(sourceSignatures[0], targetSignatures[0], reportErrors)) {
+                        return 0 /* False */;
+                    }
                 }
-                ts.Debug.assert(bindingElement.kind === 169 /* BindingElement */);
-                if (bindingElement.propertyName) {
-                    writer.writeSymbol(ts.getTextOfNode(bindingElement.propertyName), bindingElement.symbol);
-                    writePunctuation(writer, 54 /* ColonToken */);
-                    writeSpace(writer);
+                var result = -1 /* True */;
+                var saveErrorInfo = errorInfo;
+                if (getObjectFlags(source) & 64 /* Instantiated */ && getObjectFlags(target) & 64 /* Instantiated */ && source.symbol === target.symbol) {
+                    // We have instantiations of the same anonymous type (which typically will be the type of a
+                    // method). Simply do a pairwise comparison of the signatures in the two signature lists instead
+                    // of the much more expensive N * M comparison matrix we explore below. We erase type parameters
+                    // as they are known to always be the same.
+                    for (var i = 0; i < targetSignatures.length; i++) {
+                        var related = signatureRelatedTo(sourceSignatures[i], targetSignatures[i], /*erase*/ true, reportErrors);
+                        if (!related) {
+                            return 0 /* False */;
+                        }
+                        result &= related;
+                    }
                 }
-                if (ts.isBindingPattern(bindingElement.name)) {
-                    buildBindingPatternDisplay(bindingElement.name, writer, enclosingDeclaration, flags, symbolStack);
+                else if (sourceSignatures.length === 1 && targetSignatures.length === 1) {
+                    // For simple functions (functions with a single signature) we only erase type parameters for
+                    // the comparable relation. Otherwise, if the source signature is generic, we instantiate it
+                    // in the context of the target signature before checking the relationship. Ideally we'd do
+                    // this regardless of the number of signatures, but the potential costs are prohibitive due
+                    // to the quadratic nature of the logic below.
+                    var eraseGenerics = relation === comparableRelation || compilerOptions.noStrictGenericChecks;
+                    result = signatureRelatedTo(sourceSignatures[0], targetSignatures[0], eraseGenerics, reportErrors);
                 }
                 else {
-                    if (bindingElement.dotDotDotToken) {
-                        writePunctuation(writer, 22 /* DotDotDotToken */);
+                    outer: for (var _i = 0, targetSignatures_1 = targetSignatures; _i < targetSignatures_1.length; _i++) {
+                        var t = targetSignatures_1[_i];
+                        // Only elaborate errors from the first failure
+                        var shouldElaborateErrors = reportErrors;
+                        for (var _a = 0, sourceSignatures_1 = sourceSignatures; _a < sourceSignatures_1.length; _a++) {
+                            var s = sourceSignatures_1[_a];
+                            var related = signatureRelatedTo(s, t, /*erase*/ true, shouldElaborateErrors);
+                            if (related) {
+                                result &= related;
+                                errorInfo = saveErrorInfo;
+                                continue outer;
+                            }
+                            shouldElaborateErrors = false;
+                        }
+                        if (shouldElaborateErrors) {
+                            reportError(ts.Diagnostics.Type_0_provides_no_match_for_the_signature_1, typeToString(source), signatureToString(t, /*enclosingDeclaration*/ undefined, /*flags*/ undefined, kind));
+                        }
+                        return 0 /* False */;
                     }
-                    appendSymbolNameOnly(bindingElement.symbol, writer);
                 }
+                return result;
             }
-            function buildDisplayForTypeParametersAndDelimiters(typeParameters, writer, enclosingDeclaration, flags, symbolStack) {
-                if (typeParameters && typeParameters.length) {
-                    writePunctuation(writer, 25 /* LessThanToken */);
-                    buildDisplayForCommaSeparatedList(typeParameters, writer, function (p) { return buildTypeParameterDisplay(p, writer, enclosingDeclaration, flags, symbolStack); });
-                    writePunctuation(writer, 27 /* GreaterThanToken */);
-                }
+            /**
+             * See signatureAssignableTo, compareSignaturesIdentical
+             */
+            function signatureRelatedTo(source, target, erase, reportErrors) {
+                return compareSignaturesRelated(erase ? getErasedSignature(source) : source, erase ? getErasedSignature(target) : target, 
+                /*checkAsCallback*/ false, /*ignoreReturnTypes*/ false, reportErrors, reportError, isRelatedTo);
             }
-            function buildDisplayForCommaSeparatedList(list, writer, action) {
-                for (var i = 0; i < list.length; i++) {
-                    if (i > 0) {
-                        writePunctuation(writer, 24 /* CommaToken */);
-                        writeSpace(writer);
+            function signaturesIdenticalTo(source, target, kind) {
+                var sourceSignatures = getSignaturesOfType(source, kind);
+                var targetSignatures = getSignaturesOfType(target, kind);
+                if (sourceSignatures.length !== targetSignatures.length) {
+                    return 0 /* False */;
+                }
+                var result = -1 /* True */;
+                for (var i = 0; i < sourceSignatures.length; i++) {
+                    var related = compareSignaturesIdentical(sourceSignatures[i], targetSignatures[i], /*partialMatch*/ false, /*ignoreThisTypes*/ false, /*ignoreReturnTypes*/ false, isRelatedTo);
+                    if (!related) {
+                        return 0 /* False */;
                     }
-                    action(list[i]);
+                    result &= related;
                 }
+                return result;
             }
-            function buildDisplayForTypeArgumentsAndDelimiters(typeParameters, mapper, writer, enclosingDeclaration, flags, symbolStack) {
-                if (typeParameters && typeParameters.length) {
-                    writePunctuation(writer, 25 /* LessThanToken */);
-                    var flags_1 = 256 /* InFirstTypeArgument */;
-                    for (var i = 0; i < typeParameters.length; i++) {
-                        if (i > 0) {
-                            writePunctuation(writer, 24 /* CommaToken */);
-                            writeSpace(writer);
-                            flags_1 = 0 /* None */;
+            function eachPropertyRelatedTo(source, target, kind, reportErrors) {
+                var result = -1 /* True */;
+                for (var _i = 0, _a = getPropertiesOfObjectType(source); _i < _a.length; _i++) {
+                    var prop = _a[_i];
+                    if (kind === 0 /* String */ || isNumericLiteralName(prop.name)) {
+                        var related = isRelatedTo(getTypeOfSymbol(prop), target, reportErrors);
+                        if (!related) {
+                            if (reportErrors) {
+                                reportError(ts.Diagnostics.Property_0_is_incompatible_with_index_signature, symbolToString(prop));
+                            }
+                            return 0 /* False */;
                         }
-                        buildTypeDisplay(mapper(typeParameters[i]), writer, enclosingDeclaration, flags_1);
+                        result &= related;
                     }
-                    writePunctuation(writer, 27 /* GreaterThanToken */);
                 }
+                return result;
+            }
+            function indexInfoRelatedTo(sourceInfo, targetInfo, reportErrors) {
+                var related = isRelatedTo(sourceInfo.type, targetInfo.type, reportErrors);
+                if (!related && reportErrors) {
+                    reportError(ts.Diagnostics.Index_signatures_are_incompatible);
+                }
+                return related;
             }
-            function buildDisplayForParametersAndDelimiters(thisParameter, parameters, writer, enclosingDeclaration, flags, symbolStack) {
-                writePunctuation(writer, 17 /* OpenParenToken */);
-                if (thisParameter) {
-                    buildParameterDisplay(thisParameter, writer, enclosingDeclaration, flags, symbolStack);
+            function indexTypesRelatedTo(source, target, kind, sourceIsPrimitive, reportErrors) {
+                if (relation === identityRelation) {
+                    return indexTypesIdenticalTo(source, target, kind);
                 }
-                for (var i = 0; i < parameters.length; i++) {
-                    if (i > 0 || thisParameter) {
-                        writePunctuation(writer, 24 /* CommaToken */);
-                        writeSpace(writer);
+                var targetInfo = getIndexInfoOfType(target, kind);
+                if (!targetInfo || targetInfo.type.flags & 1 /* Any */ && !sourceIsPrimitive) {
+                    // Index signature of type any permits assignment from everything but primitives
+                    return -1 /* True */;
+                }
+                var sourceInfo = getIndexInfoOfType(source, kind) ||
+                    kind === 1 /* Number */ && getIndexInfoOfType(source, 0 /* String */);
+                if (sourceInfo) {
+                    return indexInfoRelatedTo(sourceInfo, targetInfo, reportErrors);
+                }
+                if (isObjectLiteralType(source)) {
+                    var related = -1 /* True */;
+                    if (kind === 0 /* String */) {
+                        var sourceNumberInfo = getIndexInfoOfType(source, 1 /* Number */);
+                        if (sourceNumberInfo) {
+                            related = indexInfoRelatedTo(sourceNumberInfo, targetInfo, reportErrors);
+                        }
                     }
-                    buildParameterDisplay(parameters[i], writer, enclosingDeclaration, flags, symbolStack);
+                    if (related) {
+                        related &= eachPropertyRelatedTo(source, targetInfo.type, kind, reportErrors);
+                    }
+                    return related;
+                }
+                if (reportErrors) {
+                    reportError(ts.Diagnostics.Index_signature_is_missing_in_type_0, typeToString(source));
                 }
-                writePunctuation(writer, 18 /* CloseParenToken */);
+                return 0 /* False */;
             }
-            function buildTypePredicateDisplay(predicate, writer, enclosingDeclaration, flags, symbolStack) {
-                if (ts.isIdentifierTypePredicate(predicate)) {
-                    writer.writeParameter(predicate.parameterName);
+            function indexTypesIdenticalTo(source, target, indexKind) {
+                var targetInfo = getIndexInfoOfType(target, indexKind);
+                var sourceInfo = getIndexInfoOfType(source, indexKind);
+                if (!sourceInfo && !targetInfo) {
+                    return -1 /* True */;
                 }
-                else {
-                    writeKeyword(writer, 97 /* ThisKeyword */);
+                if (sourceInfo && targetInfo && sourceInfo.isReadonly === targetInfo.isReadonly) {
+                    return isRelatedTo(sourceInfo.type, targetInfo.type);
                 }
-                writeSpace(writer);
-                writeKeyword(writer, 124 /* IsKeyword */);
-                writeSpace(writer);
-                buildTypeDisplay(predicate.type, writer, enclosingDeclaration, flags, symbolStack);
+                return 0 /* False */;
             }
-            function buildReturnTypeDisplay(signature, writer, enclosingDeclaration, flags, symbolStack) {
-                if (flags & 8 /* WriteArrowStyleSignature */) {
-                    writeSpace(writer);
-                    writePunctuation(writer, 34 /* EqualsGreaterThanToken */);
-                }
-                else {
-                    writePunctuation(writer, 54 /* ColonToken */);
+            function constructorVisibilitiesAreCompatible(sourceSignature, targetSignature, reportErrors) {
+                if (!sourceSignature.declaration || !targetSignature.declaration) {
+                    return true;
                 }
-                writeSpace(writer);
-                if (signature.typePredicate) {
-                    buildTypePredicateDisplay(signature.typePredicate, writer, enclosingDeclaration, flags, symbolStack);
+                var sourceAccessibility = ts.getModifierFlags(sourceSignature.declaration) & 24 /* NonPublicAccessibilityModifier */;
+                var targetAccessibility = ts.getModifierFlags(targetSignature.declaration) & 24 /* NonPublicAccessibilityModifier */;
+                // A public, protected and private signature is assignable to a private signature.
+                if (targetAccessibility === 8 /* Private */) {
+                    return true;
                 }
-                else {
-                    var returnType = getReturnTypeOfSignature(signature);
-                    buildTypeDisplay(returnType, writer, enclosingDeclaration, flags, symbolStack);
+                // A public and protected signature is assignable to a protected signature.
+                if (targetAccessibility === 16 /* Protected */ && sourceAccessibility !== 8 /* Private */) {
+                    return true;
                 }
-            }
-            function buildSignatureDisplay(signature, writer, enclosingDeclaration, flags, kind, symbolStack) {
-                if (kind === 1 /* Construct */) {
-                    writeKeyword(writer, 92 /* NewKeyword */);
-                    writeSpace(writer);
+                // Only a public signature is assignable to public signature.
+                if (targetAccessibility !== 16 /* Protected */ && !sourceAccessibility) {
+                    return true;
                 }
-                if (signature.target && (flags & 32 /* WriteTypeArgumentsOfSignature */)) {
-                    // Instantiated signature, write type arguments instead
-                    // This is achieved by passing in the mapper separately
-                    buildDisplayForTypeArgumentsAndDelimiters(signature.target.typeParameters, signature.mapper, writer, enclosingDeclaration);
+                if (reportErrors) {
+                    reportError(ts.Diagnostics.Cannot_assign_a_0_constructor_type_to_a_1_constructor_type, visibilityToString(sourceAccessibility), visibilityToString(targetAccessibility));
                 }
-                else {
-                    buildDisplayForTypeParametersAndDelimiters(signature.typeParameters, writer, enclosingDeclaration, flags, symbolStack);
+                return false;
+            }
+        }
+        // Invoke the callback for each underlying property symbol of the given symbol and return the first
+        // value that isn't undefined.
+        function forEachProperty(prop, callback) {
+            if (ts.getCheckFlags(prop) & 6 /* Synthetic */) {
+                for (var _i = 0, _a = prop.containingType.types; _i < _a.length; _i++) {
+                    var t = _a[_i];
+                    var p = getPropertyOfType(t, prop.name);
+                    var result = p && forEachProperty(p, callback);
+                    if (result) {
+                        return result;
+                    }
                 }
-                buildDisplayForParametersAndDelimiters(signature.thisParameter, signature.parameters, writer, enclosingDeclaration, flags, symbolStack);
-                buildReturnTypeDisplay(signature, writer, enclosingDeclaration, flags, symbolStack);
+                return undefined;
             }
-            return _displayBuilder || (_displayBuilder = {
-                buildSymbolDisplay: buildSymbolDisplay,
-                buildTypeDisplay: buildTypeDisplay,
-                buildTypeParameterDisplay: buildTypeParameterDisplay,
-                buildTypePredicateDisplay: buildTypePredicateDisplay,
-                buildParameterDisplay: buildParameterDisplay,
-                buildDisplayForParametersAndDelimiters: buildDisplayForParametersAndDelimiters,
-                buildDisplayForTypeParametersAndDelimiters: buildDisplayForTypeParametersAndDelimiters,
-                buildTypeParameterDisplayFromSymbol: buildTypeParameterDisplayFromSymbol,
-                buildSignatureDisplay: buildSignatureDisplay,
-                buildReturnTypeDisplay: buildReturnTypeDisplay
+            return callback(prop);
+        }
+        // Return the declaring class type of a property or undefined if property not declared in class
+        function getDeclaringClass(prop) {
+            return prop.parent && prop.parent.flags & 32 /* Class */ ? getDeclaredTypeOfSymbol(getParentOfSymbol(prop)) : undefined;
+        }
+        // Return true if some underlying source property is declared in a class that derives
+        // from the given base class.
+        function isPropertyInClassDerivedFrom(prop, baseClass) {
+            return forEachProperty(prop, function (sp) {
+                var sourceClass = getDeclaringClass(sp);
+                return sourceClass ? hasBaseType(sourceClass, baseClass) : false;
             });
         }
-        function isDeclarationVisible(node) {
-            if (node) {
-                var links = getNodeLinks(node);
-                if (links.isVisible === undefined) {
-                    links.isVisible = !!determineIfDeclarationIsVisible();
+        // Return true if source property is a valid override of protected parts of target property.
+        function isValidOverrideOf(sourceProp, targetProp) {
+            return !forEachProperty(targetProp, function (tp) { return ts.getDeclarationModifierFlagsFromSymbol(tp) & 16 /* Protected */ ?
+                !isPropertyInClassDerivedFrom(sourceProp, getDeclaringClass(tp)) : false; });
+        }
+        // Return true if the given class derives from each of the declaring classes of the protected
+        // constituents of the given property.
+        function isClassDerivedFromDeclaringClasses(checkClass, prop) {
+            return forEachProperty(prop, function (p) { return ts.getDeclarationModifierFlagsFromSymbol(p) & 16 /* Protected */ ?
+                !hasBaseType(checkClass, getDeclaringClass(p)) : false; }) ? undefined : checkClass;
+        }
+        // Return true if the given type is the constructor type for an abstract class
+        function isAbstractConstructorType(type) {
+            if (getObjectFlags(type) & 16 /* Anonymous */) {
+                var symbol = type.symbol;
+                if (symbol && symbol.flags & 32 /* Class */) {
+                    var declaration = getClassLikeDeclarationOfSymbol(symbol);
+                    if (declaration && ts.getModifierFlags(declaration) & 128 /* Abstract */) {
+                        return true;
+                    }
                 }
-                return links.isVisible;
             }
             return false;
-            function determineIfDeclarationIsVisible() {
-                switch (node.kind) {
-                    case 169 /* BindingElement */:
-                        return isDeclarationVisible(node.parent.parent);
-                    case 218 /* VariableDeclaration */:
-                        if (ts.isBindingPattern(node.name) &&
-                            !node.name.elements.length) {
-                            // If the binding pattern is empty, this variable declaration is not visible
-                            return false;
-                        }
-                    // Otherwise fall through
-                    case 225 /* ModuleDeclaration */:
-                    case 221 /* ClassDeclaration */:
-                    case 222 /* InterfaceDeclaration */:
-                    case 223 /* TypeAliasDeclaration */:
-                    case 220 /* FunctionDeclaration */:
-                    case 224 /* EnumDeclaration */:
-                    case 229 /* ImportEqualsDeclaration */:
-                        // external module augmentation is always visible
-                        if (ts.isExternalModuleAugmentation(node)) {
-                            return true;
-                        }
-                        var parent_10 = getDeclarationContainer(node);
-                        // If the node is not exported or it is not ambient module element (except import declaration)
-                        if (!(ts.getCombinedModifierFlags(node) & 1 /* Export */) &&
-                            !(node.kind !== 229 /* ImportEqualsDeclaration */ && parent_10.kind !== 256 /* SourceFile */ && ts.isInAmbientContext(parent_10))) {
-                            return isGlobalSourceFile(parent_10);
-                        }
-                        // Exported members/ambient module elements (exception import declaration) are visible if parent is visible
-                        return isDeclarationVisible(parent_10);
-                    case 145 /* PropertyDeclaration */:
-                    case 144 /* PropertySignature */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                        if (ts.getModifierFlags(node) & (8 /* Private */ | 16 /* Protected */)) {
-                            // Private/protected properties/methods are not visible
-                            return false;
+        }
+        // Return true if the given type is deeply nested. We consider this to be the case when structural type comparisons
+        // for 5 or more occurrences or instantiations of the type have been recorded on the given stack. It is possible,
+        // though highly unlikely, for this test to be true in a situation where a chain of instantiations is not infinitely
+        // expanding. Effectively, we will generate a false positive when two types are structurally equal to at least 5
+        // levels, but unequal at some level beyond that.
+        function isDeeplyNestedType(type, stack, depth) {
+            // We track all object types that have an associated symbol (representing the origin of the type)
+            if (depth >= 5 && type.flags & 32768 /* Object */) {
+                var symbol = type.symbol;
+                if (symbol) {
+                    var count = 0;
+                    for (var i = 0; i < depth; i++) {
+                        var t = stack[i];
+                        if (t.flags & 32768 /* Object */ && t.symbol === symbol) {
+                            count++;
+                            if (count >= 5)
+                                return true;
                         }
-                    // Public properties/methods are visible if its parents are visible, so const it fall into next case statement
-                    case 148 /* Constructor */:
-                    case 152 /* ConstructSignature */:
-                    case 151 /* CallSignature */:
-                    case 153 /* IndexSignature */:
-                    case 142 /* Parameter */:
-                    case 226 /* ModuleBlock */:
-                    case 156 /* FunctionType */:
-                    case 157 /* ConstructorType */:
-                    case 159 /* TypeLiteral */:
-                    case 155 /* TypeReference */:
-                    case 160 /* ArrayType */:
-                    case 161 /* TupleType */:
-                    case 162 /* UnionType */:
-                    case 163 /* IntersectionType */:
-                    case 164 /* ParenthesizedType */:
-                        return isDeclarationVisible(node.parent);
-                    // Default binding, import specifier and namespace import is visible
-                    // only on demand so by default it is not visible
-                    case 231 /* ImportClause */:
-                    case 232 /* NamespaceImport */:
-                    case 234 /* ImportSpecifier */:
-                        return false;
-                    // Type parameters are always visible
-                    case 141 /* TypeParameter */:
-                    // Source file and namespace export are always visible
-                    case 256 /* SourceFile */:
-                    case 228 /* NamespaceExportDeclaration */:
-                        return true;
-                    // Export assignments do not create name bindings outside the module
-                    case 235 /* ExportAssignment */:
-                        return false;
-                    default:
-                        return false;
+                    }
                 }
             }
+            return false;
         }
-        function collectLinkedAliases(node) {
-            var exportSymbol;
-            if (node.parent && node.parent.kind === 235 /* ExportAssignment */) {
-                exportSymbol = resolveName(node.parent, node.text, 107455 /* Value */ | 793064 /* Type */ | 1920 /* Namespace */ | 8388608 /* Alias */, ts.Diagnostics.Cannot_find_name_0, node);
+        function isPropertyIdenticalTo(sourceProp, targetProp) {
+            return compareProperties(sourceProp, targetProp, compareTypesIdentical) !== 0 /* False */;
+        }
+        function compareProperties(sourceProp, targetProp, compareTypes) {
+            // Two members are considered identical when
+            // - they are public properties with identical names, optionality, and types,
+            // - they are private or protected properties originating in the same declaration and having identical types
+            if (sourceProp === targetProp) {
+                return -1 /* True */;
             }
-            else if (node.parent.kind === 238 /* ExportSpecifier */) {
-                var exportSpecifier = node.parent;
-                exportSymbol = exportSpecifier.parent.parent.moduleSpecifier ?
-                    getExternalModuleMember(exportSpecifier.parent.parent, exportSpecifier) :
-                    resolveEntityName(exportSpecifier.propertyName || exportSpecifier.name, 107455 /* Value */ | 793064 /* Type */ | 1920 /* Namespace */ | 8388608 /* Alias */);
+            var sourcePropAccessibility = ts.getDeclarationModifierFlagsFromSymbol(sourceProp) & 24 /* NonPublicAccessibilityModifier */;
+            var targetPropAccessibility = ts.getDeclarationModifierFlagsFromSymbol(targetProp) & 24 /* NonPublicAccessibilityModifier */;
+            if (sourcePropAccessibility !== targetPropAccessibility) {
+                return 0 /* False */;
             }
-            var result = [];
-            if (exportSymbol) {
-                buildVisibleNodeList(exportSymbol.declarations);
+            if (sourcePropAccessibility) {
+                if (getTargetSymbol(sourceProp) !== getTargetSymbol(targetProp)) {
+                    return 0 /* False */;
+                }
             }
-            return result;
-            function buildVisibleNodeList(declarations) {
-                ts.forEach(declarations, function (declaration) {
-                    getNodeLinks(declaration).isVisible = true;
-                    var resultNode = getAnyImportSyntax(declaration) || declaration;
-                    if (!ts.contains(result, resultNode)) {
-                        result.push(resultNode);
-                    }
-                    if (ts.isInternalModuleImportEqualsDeclaration(declaration)) {
-                        // Add the referenced top container visible
-                        var internalModuleReference = declaration.moduleReference;
-                        var firstIdentifier = getFirstIdentifier(internalModuleReference);
-                        var importSymbol = resolveName(declaration, firstIdentifier.text, 107455 /* Value */ | 793064 /* Type */ | 1920 /* Namespace */, undefined, undefined);
-                        if (importSymbol) {
-                            buildVisibleNodeList(importSymbol.declarations);
-                        }
-                    }
-                });
+            else {
+                if ((sourceProp.flags & 67108864 /* Optional */) !== (targetProp.flags & 67108864 /* Optional */)) {
+                    return 0 /* False */;
+                }
+            }
+            if (isReadonlySymbol(sourceProp) !== isReadonlySymbol(targetProp)) {
+                return 0 /* False */;
+            }
+            return compareTypes(getTypeOfSymbol(sourceProp), getTypeOfSymbol(targetProp));
+        }
+        function isMatchingSignature(source, target, partialMatch) {
+            // A source signature matches a target signature if the two signatures have the same number of required,
+            // optional, and rest parameters.
+            if (source.parameters.length === target.parameters.length &&
+                source.minArgumentCount === target.minArgumentCount &&
+                source.hasRestParameter === target.hasRestParameter) {
+                return true;
+            }
+            // A source signature partially matches a target signature if the target signature has no fewer required
+            // parameters and no more overall parameters than the source signature (where a signature with a rest
+            // parameter is always considered to have more overall parameters than one without).
+            var sourceRestCount = source.hasRestParameter ? 1 : 0;
+            var targetRestCount = target.hasRestParameter ? 1 : 0;
+            if (partialMatch && source.minArgumentCount <= target.minArgumentCount && (sourceRestCount > targetRestCount ||
+                sourceRestCount === targetRestCount && source.parameters.length >= target.parameters.length)) {
+                return true;
             }
+            return false;
         }
         /**
-         * Push an entry on the type resolution stack. If an entry with the given target and the given property name
-         * is already on the stack, and no entries in between already have a type, then a circularity has occurred.
-         * In this case, the result values of the existing entry and all entries pushed after it are changed to false,
-         * and the value false is returned. Otherwise, the new entry is just pushed onto the stack, and true is returned.
-         * In order to see if the same query has already been done before, the target object and the propertyName both
-         * must match the one passed in.
-         *
-         * @param target The symbol, type, or signature whose type is being queried
-         * @param propertyName The property name that should be used to query the target for its type
+         * See signatureRelatedTo, compareSignaturesIdentical
          */
-        function pushTypeResolution(target, propertyName) {
-            var resolutionCycleStartIndex = findResolutionCycleStartIndex(target, propertyName);
-            if (resolutionCycleStartIndex >= 0) {
-                // A cycle was found
-                var length_2 = resolutionTargets.length;
-                for (var i = resolutionCycleStartIndex; i < length_2; i++) {
-                    resolutionResults[i] = false;
+        function compareSignaturesIdentical(source, target, partialMatch, ignoreThisTypes, ignoreReturnTypes, compareTypes) {
+            // TODO (drosen): De-duplicate code between related functions.
+            if (source === target) {
+                return -1 /* True */;
+            }
+            if (!(isMatchingSignature(source, target, partialMatch))) {
+                return 0 /* False */;
+            }
+            // Check that the two signatures have the same number of type parameters. We might consider
+            // also checking that any type parameter constraints match, but that would require instantiating
+            // the constraints with a common set of type arguments to get relatable entities in places where
+            // type parameters occur in the constraints. The complexity of doing that doesn't seem worthwhile,
+            // particularly as we're comparing erased versions of the signatures below.
+            if (ts.length(source.typeParameters) !== ts.length(target.typeParameters)) {
+                return 0 /* False */;
+            }
+            // Spec 1.0 Section 3.8.3 & 3.8.4:
+            // M and N (the signatures) are instantiated using type Any as the type argument for all type parameters declared by M and N
+            source = getErasedSignature(source);
+            target = getErasedSignature(target);
+            var result = -1 /* True */;
+            if (!ignoreThisTypes) {
+                var sourceThisType = getThisTypeOfSignature(source);
+                if (sourceThisType) {
+                    var targetThisType = getThisTypeOfSignature(target);
+                    if (targetThisType) {
+                        var related = compareTypes(sourceThisType, targetThisType);
+                        if (!related) {
+                            return 0 /* False */;
+                        }
+                        result &= related;
+                    }
                 }
-                return false;
             }
-            resolutionTargets.push(target);
-            resolutionResults.push(/*items*/ true);
-            resolutionPropertyNames.push(propertyName);
-            return true;
+            var targetLen = target.parameters.length;
+            for (var i = 0; i < targetLen; i++) {
+                var s = isRestParameterIndex(source, i) ? getRestTypeOfSignature(source) : getTypeOfParameter(source.parameters[i]);
+                var t = isRestParameterIndex(target, i) ? getRestTypeOfSignature(target) : getTypeOfParameter(target.parameters[i]);
+                var related = compareTypes(s, t);
+                if (!related) {
+                    return 0 /* False */;
+                }
+                result &= related;
+            }
+            if (!ignoreReturnTypes) {
+                result &= compareTypes(getReturnTypeOfSignature(source), getReturnTypeOfSignature(target));
+            }
+            return result;
         }
-        function findResolutionCycleStartIndex(target, propertyName) {
-            for (var i = resolutionTargets.length - 1; i >= 0; i--) {
-                if (hasType(resolutionTargets[i], resolutionPropertyNames[i])) {
-                    return -1;
+        function isRestParameterIndex(signature, parameterIndex) {
+            return signature.hasRestParameter && parameterIndex >= signature.parameters.length - 1;
+        }
+        function literalTypesWithSameBaseType(types) {
+            var commonBaseType;
+            for (var _i = 0, types_9 = types; _i < types_9.length; _i++) {
+                var t = types_9[_i];
+                var baseType = getBaseTypeOfLiteralType(t);
+                if (!commonBaseType) {
+                    commonBaseType = baseType;
                 }
-                if (resolutionTargets[i] === target && resolutionPropertyNames[i] === propertyName) {
-                    return i;
+                if (baseType === t || baseType !== commonBaseType) {
+                    return false;
                 }
             }
-            return -1;
+            return true;
         }
-        function hasType(target, propertyName) {
-            if (propertyName === 0 /* Type */) {
-                return getSymbolLinks(target).type;
-            }
-            if (propertyName === 2 /* DeclaredType */) {
-                return getSymbolLinks(target).declaredType;
-            }
-            if (propertyName === 1 /* ResolvedBaseConstructorType */) {
-                ts.Debug.assert(!!(target.flags & 32768 /* Class */));
-                return target.resolvedBaseConstructorType;
-            }
-            if (propertyName === 3 /* ResolvedReturnType */) {
-                return target.resolvedReturnType;
+        // When the candidate types are all literal types with the same base type, return a union
+        // of those literal types. Otherwise, return the leftmost type for which no type to the
+        // right is a supertype.
+        function getSupertypeOrUnion(types) {
+            return literalTypesWithSameBaseType(types) ?
+                getUnionType(types) :
+                ts.reduceLeft(types, function (s, t) { return isTypeSubtypeOf(s, t) ? t : s; });
+        }
+        function getCommonSupertype(types) {
+            if (!strictNullChecks) {
+                return getSupertypeOrUnion(types);
             }
-            ts.Debug.fail("Unhandled TypeSystemPropertyName " + propertyName);
+            var primaryTypes = ts.filter(types, function (t) { return !(t.flags & 6144 /* Nullable */); });
+            return primaryTypes.length ?
+                getNullableType(getSupertypeOrUnion(primaryTypes), getFalsyFlagsOfTypes(types) & 6144 /* Nullable */) :
+                getUnionType(types, /*subtypeReduction*/ true);
         }
-        // Pop an entry from the type resolution stack and return its associated result value. The result value will
-        // be true if no circularities were detected, or false if a circularity was found.
-        function popTypeResolution() {
-            resolutionTargets.pop();
-            resolutionPropertyNames.pop();
-            return resolutionResults.pop();
+        function isArrayType(type) {
+            return getObjectFlags(type) & 4 /* Reference */ && type.target === globalArrayType;
         }
-        function getDeclarationContainer(node) {
-            node = ts.getRootDeclaration(node);
-            while (node) {
-                switch (node.kind) {
-                    case 218 /* VariableDeclaration */:
-                    case 219 /* VariableDeclarationList */:
-                    case 234 /* ImportSpecifier */:
-                    case 233 /* NamedImports */:
-                    case 232 /* NamespaceImport */:
-                    case 231 /* ImportClause */:
-                        node = node.parent;
-                        break;
-                    default:
-                        return node.parent;
-                }
+        function isArrayLikeType(type) {
+            // A type is array-like if it is a reference to the global Array or global ReadonlyArray type,
+            // or if it is not the undefined or null type and if it is assignable to ReadonlyArray<any>
+            return getObjectFlags(type) & 4 /* Reference */ && (type.target === globalArrayType || type.target === globalReadonlyArrayType) ||
+                !(type.flags & 6144 /* Nullable */) && isTypeAssignableTo(type, anyReadonlyArrayType);
+        }
+        function isTupleLikeType(type) {
+            return !!getPropertyOfType(type, "0");
+        }
+        function isUnitType(type) {
+            return (type.flags & (224 /* Literal */ | 2048 /* Undefined */ | 4096 /* Null */)) !== 0;
+        }
+        function isLiteralType(type) {
+            return type.flags & 8 /* Boolean */ ? true :
+                type.flags & 65536 /* Union */ ? type.flags & 256 /* EnumLiteral */ ? true : !ts.forEach(type.types, function (t) { return !isUnitType(t); }) :
+                    isUnitType(type);
+        }
+        function getBaseTypeOfLiteralType(type) {
+            return type.flags & 256 /* EnumLiteral */ ? getBaseTypeOfEnumLiteralType(type) :
+                type.flags & 32 /* StringLiteral */ ? stringType :
+                    type.flags & 64 /* NumberLiteral */ ? numberType :
+                        type.flags & 128 /* BooleanLiteral */ ? booleanType :
+                            type.flags & 65536 /* Union */ ? getUnionType(ts.sameMap(type.types, getBaseTypeOfLiteralType)) :
+                                type;
+        }
+        function getWidenedLiteralType(type) {
+            return type.flags & 256 /* EnumLiteral */ ? getBaseTypeOfEnumLiteralType(type) :
+                type.flags & 32 /* StringLiteral */ && type.flags & 1048576 /* FreshLiteral */ ? stringType :
+                    type.flags & 64 /* NumberLiteral */ && type.flags & 1048576 /* FreshLiteral */ ? numberType :
+                        type.flags & 128 /* BooleanLiteral */ ? booleanType :
+                            type.flags & 65536 /* Union */ ? getUnionType(ts.sameMap(type.types, getWidenedLiteralType)) :
+                                type;
+        }
+        /**
+         * Check if a Type was written as a tuple type literal.
+         * Prefer using isTupleLikeType() unless the use of `elementTypes` is required.
+         */
+        function isTupleType(type) {
+            return !!(getObjectFlags(type) & 4 /* Reference */ && type.target.objectFlags & 8 /* Tuple */);
+        }
+        function getFalsyFlagsOfTypes(types) {
+            var result = 0;
+            for (var _i = 0, types_10 = types; _i < types_10.length; _i++) {
+                var t = types_10[_i];
+                result |= getFalsyFlags(t);
             }
+            return result;
         }
-        function getTypeOfPrototypeProperty(prototype) {
-            // TypeScript 1.0 spec (April 2014): 8.4
-            // Every class automatically contains a static property member named 'prototype',
-            // the type of which is an instantiation of the class type with type Any supplied as a type argument for each type parameter.
-            // It is an error to explicitly declare a static property member with the name 'prototype'.
-            var classType = getDeclaredTypeOfSymbol(getParentOfSymbol(prototype));
-            return classType.typeParameters ? createTypeReference(classType, ts.map(classType.typeParameters, function (_) { return anyType; })) : classType;
+        // Returns the String, Number, Boolean, StringLiteral, NumberLiteral, BooleanLiteral, Void, Undefined, or Null
+        // flags for the string, number, boolean, "", 0, false, void, undefined, or null types respectively. Returns
+        // no flags for all other types (including non-falsy literal types).
+        function getFalsyFlags(type) {
+            return type.flags & 65536 /* Union */ ? getFalsyFlagsOfTypes(type.types) :
+                type.flags & 32 /* StringLiteral */ ? type.value === "" ? 32 /* StringLiteral */ : 0 :
+                    type.flags & 64 /* NumberLiteral */ ? type.value === 0 ? 64 /* NumberLiteral */ : 0 :
+                        type.flags & 128 /* BooleanLiteral */ ? type === falseType ? 128 /* BooleanLiteral */ : 0 :
+                            type.flags & 7406 /* PossiblyFalsy */;
         }
-        // Return the type of the given property in the given type, or undefined if no such property exists
-        function getTypeOfPropertyOfType(type, name) {
-            var prop = getPropertyOfType(type, name);
-            return prop ? getTypeOfSymbol(prop) : undefined;
+        function removeDefinitelyFalsyTypes(type) {
+            return getFalsyFlags(type) & 7392 /* DefinitelyFalsy */ ?
+                filterType(type, function (t) { return !(getFalsyFlags(t) & 7392 /* DefinitelyFalsy */); }) :
+                type;
         }
-        function isTypeAny(type) {
-            return type && (type.flags & 1 /* Any */) !== 0;
+        function extractDefinitelyFalsyTypes(type) {
+            return mapType(type, getDefinitelyFalsyPartOfType);
+        }
+        function getDefinitelyFalsyPartOfType(type) {
+            return type.flags & 2 /* String */ ? emptyStringType :
+                type.flags & 4 /* Number */ ? zeroType :
+                    type.flags & 8 /* Boolean */ || type === falseType ? falseType :
+                        type.flags & (1024 /* Void */ | 2048 /* Undefined */ | 4096 /* Null */) ||
+                            type.flags & 32 /* StringLiteral */ && type.value === "" ||
+                            type.flags & 64 /* NumberLiteral */ && type.value === 0 ? type :
+                            neverType;
+        }
+        function getNullableType(type, flags) {
+            var missing = (flags & ~type.flags) & (2048 /* Undefined */ | 4096 /* Null */);
+            return missing === 0 ? type :
+                missing === 2048 /* Undefined */ ? getUnionType([type, undefinedType]) :
+                    missing === 4096 /* Null */ ? getUnionType([type, nullType]) :
+                        getUnionType([type, undefinedType, nullType]);
         }
-        function isTypeNever(type) {
-            return type && (type.flags & 8192 /* Never */) !== 0;
+        function getNonNullableType(type) {
+            return strictNullChecks ? getTypeWithFacts(type, 524288 /* NEUndefinedOrNull */) : type;
         }
-        // Return the type of a binding element parent. We check SymbolLinks first to see if a type has been
-        // assigned by contextual typing.
-        function getTypeForBindingElementParent(node) {
-            var symbol = getSymbolOfNode(node);
-            return symbol && getSymbolLinks(symbol).type || getTypeForVariableLikeDeclaration(node, /*includeOptionality*/ false);
+        /**
+         * Return true if type was inferred from an object literal or written as an object type literal
+         * with no call or construct signatures.
+         */
+        function isObjectLiteralType(type) {
+            return type.symbol && (type.symbol.flags & (4096 /* ObjectLiteral */ | 2048 /* TypeLiteral */)) !== 0 &&
+                getSignaturesOfType(type, 0 /* Call */).length === 0 &&
+                getSignaturesOfType(type, 1 /* Construct */).length === 0;
         }
-        function getTextOfPropertyName(name) {
-            switch (name.kind) {
-                case 69 /* Identifier */:
-                    return name.text;
-                case 9 /* StringLiteral */:
-                case 8 /* NumericLiteral */:
-                    return name.text;
-                case 140 /* ComputedPropertyName */:
-                    if (ts.isStringOrNumericLiteral(name.expression.kind)) {
-                        return name.expression.text;
-                    }
+        function createSymbolWithType(source, type) {
+            var symbol = createSymbol(source.flags, source.name);
+            symbol.declarations = source.declarations;
+            symbol.parent = source.parent;
+            symbol.type = type;
+            symbol.target = source;
+            if (source.valueDeclaration) {
+                symbol.valueDeclaration = source.valueDeclaration;
             }
-            return undefined;
+            return symbol;
         }
-        function isComputedNonLiteralName(name) {
-            return name.kind === 140 /* ComputedPropertyName */ && !ts.isStringOrNumericLiteral(name.expression.kind);
+        function transformTypeOfMembers(type, f) {
+            var members = ts.createMap();
+            for (var _i = 0, _a = getPropertiesOfObjectType(type); _i < _a.length; _i++) {
+                var property = _a[_i];
+                var original = getTypeOfSymbol(property);
+                var updated = f(original);
+                members.set(property.name, updated === original ? property : createSymbolWithType(property, updated));
+            }
+            return members;
         }
-        /** Return the inferred type for a binding element */
-        function getTypeForBindingElement(declaration) {
-            var pattern = declaration.parent;
-            var parentType = getTypeForBindingElementParent(pattern.parent);
-            // If parent has the unknown (error) type, then so does this binding element
-            if (parentType === unknownType) {
-                return unknownType;
+        /**
+         * If the the provided object literal is subject to the excess properties check,
+         * create a new that is exempt. Recursively mark object literal members as exempt.
+         * Leave signatures alone since they are not subject to the check.
+         */
+        function getRegularTypeOfObjectLiteral(type) {
+            if (!(getObjectFlags(type) & 128 /* ObjectLiteral */ && type.flags & 1048576 /* FreshLiteral */)) {
+                return type;
             }
-            // If no type was specified or inferred for parent, or if the specified or inferred type is any,
-            // infer from the initializer of the binding element if one is present. Otherwise, go with the
-            // undefined or any type of the parent.
-            if (!parentType || isTypeAny(parentType)) {
-                if (declaration.initializer) {
-                    return checkDeclarationInitializer(declaration);
-                }
-                return parentType;
+            var regularType = type.regularType;
+            if (regularType) {
+                return regularType;
             }
-            var type;
-            if (pattern.kind === 167 /* ObjectBindingPattern */) {
-                // Use explicitly specified property name ({ p: xxx } form), or otherwise the implied name ({ p } form)
-                var name_14 = declaration.propertyName || declaration.name;
-                if (isComputedNonLiteralName(name_14)) {
-                    // computed properties with non-literal names are treated as 'any'
+            var resolved = type;
+            var members = transformTypeOfMembers(type, getRegularTypeOfObjectLiteral);
+            var regularNew = createAnonymousType(resolved.symbol, members, resolved.callSignatures, resolved.constructSignatures, resolved.stringIndexInfo, resolved.numberIndexInfo);
+            regularNew.flags = resolved.flags & ~1048576 /* FreshLiteral */;
+            regularNew.objectFlags |= 128 /* ObjectLiteral */;
+            type.regularType = regularNew;
+            return regularNew;
+        }
+        function getWidenedProperty(prop) {
+            var original = getTypeOfSymbol(prop);
+            var widened = getWidenedType(original);
+            return widened === original ? prop : createSymbolWithType(prop, widened);
+        }
+        function getWidenedTypeOfObjectLiteral(type) {
+            var members = ts.createMap();
+            for (var _i = 0, _a = getPropertiesOfObjectType(type); _i < _a.length; _i++) {
+                var prop = _a[_i];
+                // Since get accessors already widen their return value there is no need to
+                // widen accessor based properties here.
+                members.set(prop.name, prop.flags & 4 /* Property */ ? getWidenedProperty(prop) : prop);
+            }
+            var stringIndexInfo = getIndexInfoOfType(type, 0 /* String */);
+            var numberIndexInfo = getIndexInfoOfType(type, 1 /* Number */);
+            return createAnonymousType(type.symbol, members, emptyArray, emptyArray, stringIndexInfo && createIndexInfo(getWidenedType(stringIndexInfo.type), stringIndexInfo.isReadonly), numberIndexInfo && createIndexInfo(getWidenedType(numberIndexInfo.type), numberIndexInfo.isReadonly));
+        }
+        function getWidenedConstituentType(type) {
+            return type.flags & 6144 /* Nullable */ ? type : getWidenedType(type);
+        }
+        function getWidenedType(type) {
+            if (type.flags & 6291456 /* RequiresWidening */) {
+                if (type.flags & 6144 /* Nullable */) {
                     return anyType;
                 }
-                if (declaration.initializer) {
-                    getContextualType(declaration.initializer);
-                }
-                // Use type of the specified property, or otherwise, for a numeric name, the type of the numeric index signature,
-                // or otherwise the type of the string index signature.
-                var text = getTextOfPropertyName(name_14);
-                type = getTypeOfPropertyOfType(parentType, text) ||
-                    isNumericLiteralName(text) && getIndexTypeOfType(parentType, 1 /* Number */) ||
-                    getIndexTypeOfType(parentType, 0 /* String */);
-                if (!type) {
-                    error(name_14, ts.Diagnostics.Type_0_has_no_property_1_and_no_string_index_signature, typeToString(parentType), ts.declarationNameToString(name_14));
-                    return unknownType;
+                if (getObjectFlags(type) & 128 /* ObjectLiteral */) {
+                    return getWidenedTypeOfObjectLiteral(type);
+                }
+                if (type.flags & 65536 /* Union */) {
+                    return getUnionType(ts.sameMap(type.types, getWidenedConstituentType));
+                }
+                if (isArrayType(type) || isTupleType(type)) {
+                    return createTypeReference(type.target, ts.sameMap(type.typeArguments, getWidenedType));
+                }
+            }
+            return type;
+        }
+        /**
+         * Reports implicit any errors that occur as a result of widening 'null' and 'undefined'
+         * to 'any'. A call to reportWideningErrorsInType is normally accompanied by a call to
+         * getWidenedType. But in some cases getWidenedType is called without reporting errors
+         * (type argument inference is an example).
+         *
+         * The return value indicates whether an error was in fact reported. The particular circumstances
+         * are on a best effort basis. Currently, if the null or undefined that causes widening is inside
+         * an object literal property (arbitrarily deeply), this function reports an error. If no error is
+         * reported, reportImplicitAnyError is a suitable fallback to report a general error.
+         */
+        function reportWideningErrorsInType(type) {
+            var errorReported = false;
+            if (type.flags & 65536 /* Union */) {
+                for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                    var t = _a[_i];
+                    if (reportWideningErrorsInType(t)) {
+                        errorReported = true;
+                    }
+                }
+            }
+            if (isArrayType(type) || isTupleType(type)) {
+                for (var _b = 0, _c = type.typeArguments; _b < _c.length; _b++) {
+                    var t = _c[_b];
+                    if (reportWideningErrorsInType(t)) {
+                        errorReported = true;
+                    }
                 }
             }
-            else {
-                // This elementType will be used if the specific property corresponding to this index is not
-                // present (aka the tuple element property). This call also checks that the parentType is in
-                // fact an iterable or array (depending on target language).
-                var elementType = checkIteratedTypeOrElementType(parentType, pattern, /*allowStringInput*/ false);
-                if (!declaration.dotDotDotToken) {
-                    // Use specific property type when parent is a tuple or numeric index type when parent is an array
-                    var propName = "" + ts.indexOf(pattern.elements, declaration);
-                    type = isTupleLikeType(parentType)
-                        ? getTypeOfPropertyOfType(parentType, propName)
-                        : elementType;
-                    if (!type) {
-                        if (isTupleType(parentType)) {
-                            error(declaration, ts.Diagnostics.Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2, typeToString(parentType), getTypeReferenceArity(parentType), pattern.elements.length);
-                        }
-                        else {
-                            error(declaration, ts.Diagnostics.Type_0_has_no_property_1, typeToString(parentType), propName);
+            if (getObjectFlags(type) & 128 /* ObjectLiteral */) {
+                for (var _d = 0, _e = getPropertiesOfObjectType(type); _d < _e.length; _d++) {
+                    var p = _e[_d];
+                    var t = getTypeOfSymbol(p);
+                    if (t.flags & 2097152 /* ContainsWideningType */) {
+                        if (!reportWideningErrorsInType(t)) {
+                            error(p.valueDeclaration, ts.Diagnostics.Object_literal_s_property_0_implicitly_has_an_1_type, p.name, typeToString(getWidenedType(t)));
                         }
-                        return unknownType;
+                        errorReported = true;
                     }
                 }
-                else {
-                    // Rest element has an array type with the same element type as the parent type
-                    type = createArrayType(elementType);
-                }
             }
-            // In strict null checking mode, if a default value of a non-undefined type is specified, remove
-            // undefined from the final type.
-            if (strictNullChecks && declaration.initializer && !(getFalsyFlags(checkExpressionCached(declaration.initializer)) & 2048 /* Undefined */)) {
-                type = getTypeWithFacts(type, 131072 /* NEUndefined */);
-            }
-            return declaration.initializer ?
-                getUnionType([type, checkExpressionCached(declaration.initializer)], /*subtypeReduction*/ true) :
-                type;
+            return errorReported;
         }
-        function getTypeForVariableLikeDeclarationFromJSDocComment(declaration) {
-            var jsDocType = getJSDocTypeForVariableLikeDeclarationFromJSDocComment(declaration);
-            if (jsDocType) {
-                return getTypeFromTypeNode(jsDocType);
+        function reportImplicitAnyError(declaration, type) {
+            var typeAsString = typeToString(getWidenedType(type));
+            var diagnostic;
+            switch (declaration.kind) {
+                case 149 /* PropertyDeclaration */:
+                case 148 /* PropertySignature */:
+                    diagnostic = ts.Diagnostics.Member_0_implicitly_has_an_1_type;
+                    break;
+                case 146 /* Parameter */:
+                    diagnostic = declaration.dotDotDotToken ?
+                        ts.Diagnostics.Rest_parameter_0_implicitly_has_an_any_type :
+                        ts.Diagnostics.Parameter_0_implicitly_has_an_1_type;
+                    break;
+                case 176 /* BindingElement */:
+                    diagnostic = ts.Diagnostics.Binding_element_0_implicitly_has_an_1_type;
+                    break;
+                case 228 /* FunctionDeclaration */:
+                case 151 /* MethodDeclaration */:
+                case 150 /* MethodSignature */:
+                case 153 /* GetAccessor */:
+                case 154 /* SetAccessor */:
+                case 186 /* FunctionExpression */:
+                case 187 /* ArrowFunction */:
+                    if (!declaration.name) {
+                        error(declaration, ts.Diagnostics.Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type, typeAsString);
+                        return;
+                    }
+                    diagnostic = ts.Diagnostics._0_which_lacks_return_type_annotation_implicitly_has_an_1_return_type;
+                    break;
+                default:
+                    diagnostic = ts.Diagnostics.Variable_0_implicitly_has_an_1_type;
             }
+            error(declaration, diagnostic, ts.declarationNameToString(ts.getNameOfDeclaration(declaration)), typeAsString);
         }
-        function getJSDocTypeForVariableLikeDeclarationFromJSDocComment(declaration) {
-            // First, see if this node has an @type annotation on it directly.
-            var typeTag = ts.getJSDocTypeTag(declaration);
-            if (typeTag && typeTag.typeExpression) {
-                return typeTag.typeExpression.type;
-            }
-            if (declaration.kind === 218 /* VariableDeclaration */ &&
-                declaration.parent.kind === 219 /* VariableDeclarationList */ &&
-                declaration.parent.parent.kind === 200 /* VariableStatement */) {
-                // @type annotation might have been on the variable statement, try that instead.
-                var annotation = ts.getJSDocTypeTag(declaration.parent.parent);
-                if (annotation && annotation.typeExpression) {
-                    return annotation.typeExpression.type;
-                }
-            }
-            else if (declaration.kind === 142 /* Parameter */) {
-                // If it's a parameter, see if the parent has a jsdoc comment with an @param
-                // annotation.
-                var paramTag = ts.getCorrespondingJSDocParameterTag(declaration);
-                if (paramTag && paramTag.typeExpression) {
-                    return paramTag.typeExpression.type;
+        function reportErrorsFromWidening(declaration, type) {
+            if (produceDiagnostics && noImplicitAny && type.flags & 2097152 /* ContainsWideningType */) {
+                // Report implicit any error within type if possible, otherwise report error on declaration
+                if (!reportWideningErrorsInType(type)) {
+                    reportImplicitAnyError(declaration, type);
                 }
             }
-            return undefined;
-        }
-        function addOptionality(type, optional) {
-            return strictNullChecks && optional ? includeFalsyTypes(type, 2048 /* Undefined */) : type;
         }
-        // Return the inferred type for a variable, parameter, or property declaration
-        function getTypeForVariableLikeDeclaration(declaration, includeOptionality) {
-            if (declaration.flags & 1048576 /* JavaScriptFile */) {
-                // If this is a variable in a JavaScript file, then use the JSDoc type (if it has
-                // one as its type), otherwise fallback to the below standard TS codepaths to
-                // try to figure it out.
-                var type = getTypeForVariableLikeDeclarationFromJSDocComment(declaration);
-                if (type && type !== unknownType) {
-                    return type;
-                }
+        function forEachMatchingParameterType(source, target, callback) {
+            var sourceMax = source.parameters.length;
+            var targetMax = target.parameters.length;
+            var count;
+            if (source.hasRestParameter && target.hasRestParameter) {
+                count = Math.max(sourceMax, targetMax);
             }
-            // A variable declared in a for..in statement is always of type string
-            if (declaration.parent.parent.kind === 207 /* ForInStatement */) {
-                return stringType;
+            else if (source.hasRestParameter) {
+                count = targetMax;
             }
-            if (declaration.parent.parent.kind === 208 /* ForOfStatement */) {
-                // checkRightHandSideOfForOf will return undefined if the for-of expression type was
-                // missing properties/signatures required to get its iteratedType (like
-                // [Symbol.iterator] or next). This may be because we accessed properties from anyType,
-                // or it may have led to an error inside getElementTypeOfIterable.
-                return checkRightHandSideOfForOf(declaration.parent.parent.expression) || anyType;
+            else if (target.hasRestParameter) {
+                count = sourceMax;
             }
-            if (ts.isBindingPattern(declaration.parent)) {
-                return getTypeForBindingElement(declaration);
+            else {
+                count = Math.min(sourceMax, targetMax);
             }
-            // Use type from type annotation if one is present
-            if (declaration.type) {
-                return addOptionality(getTypeFromTypeNode(declaration.type), /*optional*/ declaration.questionToken && includeOptionality);
+            for (var i = 0; i < count; i++) {
+                callback(getTypeAtPosition(source, i), getTypeAtPosition(target, i));
             }
-            if (declaration.kind === 142 /* Parameter */) {
-                var func = declaration.parent;
-                // For a parameter of a set accessor, use the type of the get accessor if one is present
-                if (func.kind === 150 /* SetAccessor */ && !ts.hasDynamicName(func)) {
-                    var getter = ts.getDeclarationOfKind(declaration.parent.symbol, 149 /* GetAccessor */);
-                    if (getter) {
-                        var getterSignature = getSignatureFromDeclaration(getter);
-                        var thisParameter = getAccessorThisParameter(func);
-                        if (thisParameter && declaration === thisParameter) {
-                            // Use the type from the *getter*
-                            ts.Debug.assert(!thisParameter.type);
-                            return getTypeOfSymbol(getterSignature.thisParameter);
-                        }
-                        return getReturnTypeOfSignature(getterSignature);
+        }
+        function createInferenceContext(signature, flags, baseInferences) {
+            var inferences = baseInferences ? ts.map(baseInferences, cloneInferenceInfo) : ts.map(signature.typeParameters, createInferenceInfo);
+            var context = mapper;
+            context.mappedTypes = signature.typeParameters;
+            context.signature = signature;
+            context.inferences = inferences;
+            context.flags = flags;
+            return context;
+            function mapper(t) {
+                for (var i = 0; i < inferences.length; i++) {
+                    if (t === inferences[i].typeParameter) {
+                        inferences[i].isFixed = true;
+                        return getInferredType(context, i);
                     }
                 }
-                // Use contextual parameter type if one is available
-                var type = void 0;
-                if (declaration.symbol.name === "this") {
-                    var thisParameter = getContextualThisParameter(func);
-                    type = thisParameter ? getTypeOfSymbol(thisParameter) : undefined;
-                }
-                else {
-                    type = getContextuallyTypedParameterType(declaration);
-                }
-                if (type) {
-                    return addOptionality(type, /*optional*/ declaration.questionToken && includeOptionality);
-                }
-            }
-            // Use the type of the initializer expression if one is present
-            if (declaration.initializer) {
-                var type = checkDeclarationInitializer(declaration);
-                return addOptionality(type, /*optional*/ declaration.questionToken && includeOptionality);
-            }
-            // If it is a short-hand property assignment, use the type of the identifier
-            if (declaration.kind === 254 /* ShorthandPropertyAssignment */) {
-                return checkIdentifier(declaration.name);
-            }
-            // If the declaration specifies a binding pattern, use the type implied by the binding pattern
-            if (ts.isBindingPattern(declaration.name)) {
-                return getTypeFromBindingPattern(declaration.name, /*includePatternInType*/ false, /*reportErrors*/ true);
+                return t;
             }
-            // No type specified and nothing can be inferred
-            return undefined;
         }
-        // Return the type implied by a binding pattern element. This is the type of the initializer of the element if
-        // one is present. Otherwise, if the element is itself a binding pattern, it is the type implied by the binding
-        // pattern. Otherwise, it is the type any.
-        function getTypeFromBindingElement(element, includePatternInType, reportErrors) {
-            if (element.initializer) {
-                return checkDeclarationInitializer(element);
-            }
-            if (ts.isBindingPattern(element.name)) {
-                return getTypeFromBindingPattern(element.name, includePatternInType, reportErrors);
-            }
-            if (reportErrors && compilerOptions.noImplicitAny && !declarationBelongsToPrivateAmbientMember(element)) {
-                reportImplicitAnyError(element, anyType);
-            }
-            return anyType;
+        function createInferenceInfo(typeParameter) {
+            return {
+                typeParameter: typeParameter,
+                candidates: undefined,
+                inferredType: undefined,
+                priority: undefined,
+                topLevel: true,
+                isFixed: false
+            };
         }
-        // Return the type implied by an object binding pattern
-        function getTypeFromObjectBindingPattern(pattern, includePatternInType, reportErrors) {
-            var members = ts.createMap();
-            var hasComputedProperties = false;
-            ts.forEach(pattern.elements, function (e) {
-                var name = e.propertyName || e.name;
-                if (isComputedNonLiteralName(name)) {
-                    // do not include computed properties in the implied type
-                    hasComputedProperties = true;
-                    return;
-                }
-                var text = getTextOfPropertyName(name);
-                var flags = 4 /* Property */ | 67108864 /* Transient */ | (e.initializer ? 536870912 /* Optional */ : 0);
-                var symbol = createSymbol(flags, text);
-                symbol.type = getTypeFromBindingElement(e, includePatternInType, reportErrors);
-                symbol.bindingElement = e;
-                members[symbol.name] = symbol;
-            });
-            var result = createAnonymousType(undefined, members, emptyArray, emptyArray, undefined, undefined);
-            if (includePatternInType) {
-                result.pattern = pattern;
-            }
-            if (hasComputedProperties) {
-                result.flags |= 536870912 /* ObjectLiteralPatternWithComputedProperties */;
-            }
-            return result;
+        function cloneInferenceInfo(inference) {
+            return {
+                typeParameter: inference.typeParameter,
+                candidates: inference.candidates && inference.candidates.slice(),
+                inferredType: inference.inferredType,
+                priority: inference.priority,
+                topLevel: inference.topLevel,
+                isFixed: inference.isFixed
+            };
         }
-        // Return the type implied by an array binding pattern
-        function getTypeFromArrayBindingPattern(pattern, includePatternInType, reportErrors) {
-            var elements = pattern.elements;
-            var lastElement = ts.lastOrUndefined(elements);
-            if (elements.length === 0 || (!ts.isOmittedExpression(lastElement) && lastElement.dotDotDotToken)) {
-                return languageVersion >= 2 /* ES6 */ ? createIterableType(anyType) : anyArrayType;
-            }
-            // If the pattern has at least one element, and no rest element, then it should imply a tuple type.
-            var elementTypes = ts.map(elements, function (e) { return ts.isOmittedExpression(e) ? anyType : getTypeFromBindingElement(e, includePatternInType, reportErrors); });
-            var result = createTupleType(elementTypes);
-            if (includePatternInType) {
-                result = cloneTypeReference(result);
-                result.pattern = pattern;
-            }
-            return result;
+        // Return true if the given type could possibly reference a type parameter for which
+        // we perform type inference (i.e. a type parameter of a generic function). We cache
+        // results for union and intersection types for performance reasons.
+        function couldContainTypeVariables(type) {
+            var objectFlags = getObjectFlags(type);
+            return !!(type.flags & 540672 /* TypeVariable */ ||
+                objectFlags & 4 /* Reference */ && ts.forEach(type.typeArguments, couldContainTypeVariables) ||
+                objectFlags & 16 /* Anonymous */ && type.symbol && type.symbol.flags & (16 /* Function */ | 8192 /* Method */ | 2048 /* TypeLiteral */ | 32 /* Class */) ||
+                objectFlags & 32 /* Mapped */ ||
+                type.flags & 196608 /* UnionOrIntersection */ && couldUnionOrIntersectionContainTypeVariables(type));
         }
-        // Return the type implied by a binding pattern. This is the type implied purely by the binding pattern itself
-        // and without regard to its context (i.e. without regard any type annotation or initializer associated with the
-        // declaration in which the binding pattern is contained). For example, the implied type of [x, y] is [any, any]
-        // and the implied type of { x, y: z = 1 } is { x: any; y: number; }. The type implied by a binding pattern is
-        // used as the contextual type of an initializer associated with the binding pattern. Also, for a destructuring
-        // parameter with no type annotation or initializer, the type implied by the binding pattern becomes the type of
-        // the parameter.
-        function getTypeFromBindingPattern(pattern, includePatternInType, reportErrors) {
-            return pattern.kind === 167 /* ObjectBindingPattern */
-                ? getTypeFromObjectBindingPattern(pattern, includePatternInType, reportErrors)
-                : getTypeFromArrayBindingPattern(pattern, includePatternInType, reportErrors);
+        function couldUnionOrIntersectionContainTypeVariables(type) {
+            if (type.couldContainTypeVariables === undefined) {
+                type.couldContainTypeVariables = ts.forEach(type.types, couldContainTypeVariables);
+            }
+            return type.couldContainTypeVariables;
         }
-        // Return the type associated with a variable, parameter, or property declaration. In the simple case this is the type
-        // specified in a type annotation or inferred from an initializer. However, in the case of a destructuring declaration it
-        // is a bit more involved. For example:
-        //
-        //   var [x, s = ""] = [1, "one"];
-        //
-        // Here, the array literal [1, "one"] is contextually typed by the type [any, string], which is the implied type of the
-        // binding pattern [x, s = ""]. Because the contextual type is a tuple type, the resulting type of [1, "one"] is the
-        // tuple type [number, string]. Thus, the type inferred for 'x' is number and the type inferred for 's' is string.
-        function getWidenedTypeForVariableLikeDeclaration(declaration, reportErrors) {
-            var type = getTypeForVariableLikeDeclaration(declaration, /*includeOptionality*/ true);
-            if (type) {
-                if (reportErrors) {
-                    reportErrorsFromWidening(declaration, type);
-                }
-                // During a normal type check we'll never get to here with a property assignment (the check of the containing
-                // object literal uses a different path). We exclude widening only so that language services and type verification
-                // tools see the actual type.
-                if (declaration.kind === 253 /* PropertyAssignment */) {
-                    return type;
+        function isTypeParameterAtTopLevel(type, typeParameter) {
+            return type === typeParameter || type.flags & 196608 /* UnionOrIntersection */ && ts.forEach(type.types, function (t) { return isTypeParameterAtTopLevel(t, typeParameter); });
+        }
+        // Infer a suitable input type for a homomorphic mapped type { [P in keyof T]: X }. We construct
+        // an object type with the same set of properties as the source type, where the type of each
+        // property is computed by inferring from the source property type to X for the type
+        // variable T[P] (i.e. we treat the type T[P] as the type variable we're inferring for).
+        function inferTypeForHomomorphicMappedType(source, target) {
+            var properties = getPropertiesOfType(source);
+            var indexInfo = getIndexInfoOfType(source, 0 /* String */);
+            if (properties.length === 0 && !indexInfo) {
+                return undefined;
+            }
+            var typeParameter = getIndexedAccessType(getConstraintTypeFromMappedType(target).type, getTypeParameterFromMappedType(target));
+            var inference = createInferenceInfo(typeParameter);
+            var inferences = [inference];
+            var templateType = getTemplateTypeFromMappedType(target);
+            var readonlyMask = target.declaration.readonlyToken ? false : true;
+            var optionalMask = target.declaration.questionToken ? 0 : 67108864 /* Optional */;
+            var members = ts.createMap();
+            for (var _i = 0, properties_4 = properties; _i < properties_4.length; _i++) {
+                var prop = properties_4[_i];
+                var inferredPropType = inferTargetType(getTypeOfSymbol(prop));
+                if (!inferredPropType) {
+                    return undefined;
                 }
-                return getWidenedType(type);
+                var inferredProp = createSymbol(4 /* Property */ | prop.flags & optionalMask, prop.name);
+                inferredProp.checkFlags = readonlyMask && isReadonlySymbol(prop) ? 8 /* Readonly */ : 0;
+                inferredProp.declarations = prop.declarations;
+                inferredProp.type = inferredPropType;
+                members.set(prop.name, inferredProp);
             }
-            // Rest parameters default to type any[], other parameters default to type any
-            type = declaration.dotDotDotToken ? anyArrayType : anyType;
-            // Report implicit any errors unless this is a private property within an ambient declaration
-            if (reportErrors && compilerOptions.noImplicitAny) {
-                if (!declarationBelongsToPrivateAmbientMember(declaration)) {
-                    reportImplicitAnyError(declaration, type);
+            if (indexInfo) {
+                var inferredIndexType = inferTargetType(indexInfo.type);
+                if (!inferredIndexType) {
+                    return undefined;
                 }
+                indexInfo = createIndexInfo(inferredIndexType, readonlyMask && indexInfo.isReadonly);
+            }
+            return createAnonymousType(undefined, members, emptyArray, emptyArray, indexInfo, undefined);
+            function inferTargetType(sourceType) {
+                inference.candidates = undefined;
+                inferTypes(inferences, sourceType, templateType);
+                return inference.candidates && getUnionType(inference.candidates, /*subtypeReduction*/ true);
             }
-            return type;
-        }
-        function declarationBelongsToPrivateAmbientMember(declaration) {
-            var root = ts.getRootDeclaration(declaration);
-            var memberDeclaration = root.kind === 142 /* Parameter */ ? root.parent : root;
-            return isPrivateWithinAmbient(memberDeclaration);
         }
-        function getTypeOfVariableOrParameterOrProperty(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.type) {
-                // Handle prototype property
-                if (symbol.flags & 134217728 /* Prototype */) {
-                    return links.type = getTypeOfPrototypeProperty(symbol);
+        function inferTypes(inferences, originalSource, originalTarget, priority) {
+            if (priority === void 0) { priority = 0; }
+            var symbolStack;
+            var visited;
+            inferFromTypes(originalSource, originalTarget);
+            function inferFromTypes(source, target) {
+                if (!couldContainTypeVariables(target)) {
+                    return;
                 }
-                // Handle catch clause variables
-                var declaration = symbol.valueDeclaration;
-                if (declaration.parent.kind === 252 /* CatchClause */) {
-                    return links.type = anyType;
+                if (source.aliasSymbol && source.aliasTypeArguments && source.aliasSymbol === target.aliasSymbol) {
+                    // Source and target are types originating in the same generic type alias declaration.
+                    // Simply infer from source type arguments to target type arguments.
+                    var sourceTypes = source.aliasTypeArguments;
+                    var targetTypes = target.aliasTypeArguments;
+                    for (var i = 0; i < sourceTypes.length; i++) {
+                        inferFromTypes(sourceTypes[i], targetTypes[i]);
+                    }
+                    return;
                 }
-                // Handle export default expressions
-                if (declaration.kind === 235 /* ExportAssignment */) {
-                    return links.type = checkExpression(declaration.expression);
+                if (source.flags & 65536 /* Union */ && target.flags & 65536 /* Union */ && !(source.flags & 256 /* EnumLiteral */ && target.flags & 256 /* EnumLiteral */) ||
+                    source.flags & 131072 /* Intersection */ && target.flags & 131072 /* Intersection */) {
+                    // Source and target are both unions or both intersections. If source and target
+                    // are the same type, just relate each constituent type to itself.
+                    if (source === target) {
+                        for (var _i = 0, _a = source.types; _i < _a.length; _i++) {
+                            var t = _a[_i];
+                            inferFromTypes(t, t);
+                        }
+                        return;
+                    }
+                    // Find each source constituent type that has an identically matching target constituent
+                    // type, and for each such type infer from the type to itself. When inferring from a
+                    // type to itself we effectively find all type parameter occurrences within that type
+                    // and infer themselves as their type arguments. We have special handling for numeric
+                    // and string literals because the number and string types are not represented as unions
+                    // of all their possible values.
+                    var matchingTypes = void 0;
+                    for (var _b = 0, _c = source.types; _b < _c.length; _b++) {
+                        var t = _c[_b];
+                        if (typeIdenticalToSomeType(t, target.types)) {
+                            (matchingTypes || (matchingTypes = [])).push(t);
+                            inferFromTypes(t, t);
+                        }
+                        else if (t.flags & (64 /* NumberLiteral */ | 32 /* StringLiteral */)) {
+                            var b = getBaseTypeOfLiteralType(t);
+                            if (typeIdenticalToSomeType(b, target.types)) {
+                                (matchingTypes || (matchingTypes = [])).push(t, b);
+                            }
+                        }
+                    }
+                    // Next, to improve the quality of inferences, reduce the source and target types by
+                    // removing the identically matched constituents. For example, when inferring from
+                    // 'string | string[]' to 'string | T' we reduce the types to 'string[]' and 'T'.
+                    if (matchingTypes) {
+                        source = removeTypesFromUnionOrIntersection(source, matchingTypes);
+                        target = removeTypesFromUnionOrIntersection(target, matchingTypes);
+                    }
                 }
-                if (declaration.flags & 1048576 /* JavaScriptFile */ && declaration.kind === 280 /* JSDocPropertyTag */ && declaration.typeExpression) {
-                    return links.type = getTypeFromTypeNode(declaration.typeExpression.type);
+                if (target.flags & 540672 /* TypeVariable */) {
+                    // If target is a type parameter, make an inference, unless the source type contains
+                    // the anyFunctionType (the wildcard type that's used to avoid contextually typing functions).
+                    // Because the anyFunctionType is internal, it should not be exposed to the user by adding
+                    // it as an inference candidate. Hopefully, a better candidate will come along that does
+                    // not contain anyFunctionType when we come back to this argument for its second round
+                    // of inference. Also, we exclude inferences for silentNeverType which is used as a wildcard
+                    // when constructing types from type parameters that had no inference candidates.
+                    if (source.flags & 8388608 /* ContainsAnyFunctionType */ || source === silentNeverType) {
+                        return;
+                    }
+                    var inference = getInferenceInfoForType(target);
+                    if (inference) {
+                        if (!inference.isFixed) {
+                            if (!inference.candidates || priority < inference.priority) {
+                                inference.candidates = [source];
+                                inference.priority = priority;
+                            }
+                            else if (priority === inference.priority) {
+                                inference.candidates.push(source);
+                            }
+                            if (!(priority & 4 /* ReturnType */) && target.flags & 16384 /* TypeParameter */ && !isTypeParameterAtTopLevel(originalTarget, target)) {
+                                inference.topLevel = false;
+                            }
+                        }
+                        return;
+                    }
                 }
-                // Handle variable, parameter or property
-                if (!pushTypeResolution(symbol, 0 /* Type */)) {
-                    return unknownType;
+                else if (getObjectFlags(source) & 4 /* Reference */ && getObjectFlags(target) & 4 /* Reference */ && source.target === target.target) {
+                    // If source and target are references to the same generic type, infer from type arguments
+                    var sourceTypes = source.typeArguments || emptyArray;
+                    var targetTypes = target.typeArguments || emptyArray;
+                    var count = sourceTypes.length < targetTypes.length ? sourceTypes.length : targetTypes.length;
+                    for (var i = 0; i < count; i++) {
+                        inferFromTypes(sourceTypes[i], targetTypes[i]);
+                    }
                 }
-                var type = void 0;
-                // Handle certain special assignment kinds, which happen to union across multiple declarations:
-                // * module.exports = expr
-                // * exports.p = expr
-                // * this.p = expr
-                // * className.prototype.method = expr
-                if (declaration.kind === 187 /* BinaryExpression */ ||
-                    declaration.kind === 172 /* PropertyAccessExpression */ && declaration.parent.kind === 187 /* BinaryExpression */) {
-                    // Use JS Doc type if present on parent expression statement
-                    if (declaration.flags & 1048576 /* JavaScriptFile */) {
-                        var typeTag = ts.getJSDocTypeTag(declaration.parent);
-                        if (typeTag && typeTag.typeExpression) {
-                            return links.type = getTypeFromTypeNode(typeTag.typeExpression.type);
+                else if (target.flags & 196608 /* UnionOrIntersection */) {
+                    var targetTypes = target.types;
+                    var typeVariableCount = 0;
+                    var typeVariable = void 0;
+                    // First infer to each type in union or intersection that isn't a type variable
+                    for (var _d = 0, targetTypes_3 = targetTypes; _d < targetTypes_3.length; _d++) {
+                        var t = targetTypes_3[_d];
+                        if (getInferenceInfoForType(t)) {
+                            typeVariable = t;
+                            typeVariableCount++;
+                        }
+                        else {
+                            inferFromTypes(source, t);
                         }
                     }
-                    var declaredTypes = ts.map(symbol.declarations, function (decl) { return decl.kind === 187 /* BinaryExpression */ ?
-                        checkExpressionCached(decl.right) :
-                        checkExpressionCached(decl.parent.right); });
-                    type = getUnionType(declaredTypes, /*subtypeReduction*/ true);
-                }
-                else {
-                    type = getWidenedTypeForVariableLikeDeclaration(declaration, /*reportErrors*/ true);
+                    // Next, if target containings a single naked type variable, make a secondary inference to that type
+                    // variable. This gives meaningful results for union types in co-variant positions and intersection
+                    // types in contra-variant positions (such as callback parameters).
+                    if (typeVariableCount === 1) {
+                        var savePriority = priority;
+                        priority |= 1 /* NakedTypeVariable */;
+                        inferFromTypes(source, typeVariable);
+                        priority = savePriority;
+                    }
                 }
-                if (!popTypeResolution()) {
-                    if (symbol.valueDeclaration.type) {
-                        // Variable has type annotation that circularly references the variable itself
-                        type = unknownType;
-                        error(symbol.valueDeclaration, ts.Diagnostics._0_is_referenced_directly_or_indirectly_in_its_own_type_annotation, symbolToString(symbol));
+                else if (source.flags & 196608 /* UnionOrIntersection */) {
+                    // Source is a union or intersection type, infer from each constituent type
+                    var sourceTypes = source.types;
+                    for (var _e = 0, sourceTypes_3 = sourceTypes; _e < sourceTypes_3.length; _e++) {
+                        var sourceType = sourceTypes_3[_e];
+                        inferFromTypes(sourceType, target);
                     }
-                    else {
-                        // Variable has initializer that circularly references the variable itself
-                        type = anyType;
-                        if (compilerOptions.noImplicitAny) {
-                            error(symbol.valueDeclaration, ts.Diagnostics._0_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_and_is_referenced_directly_or_indirectly_in_its_own_initializer, symbolToString(symbol));
+                }
+                else {
+                    source = getApparentType(source);
+                    if (source.flags & 32768 /* Object */) {
+                        var key = source.id + "," + target.id;
+                        if (visited && visited.get(key)) {
+                            return;
+                        }
+                        (visited || (visited = ts.createMap())).set(key, true);
+                        // If we are already processing another target type with the same associated symbol (such as
+                        // an instantiation of the same generic type), we do not explore this target as it would yield
+                        // no further inferences. We exclude the static side of classes from this check since it shares
+                        // its symbol with the instance side which would lead to false positives.
+                        var isNonConstructorObject = target.flags & 32768 /* Object */ &&
+                            !(getObjectFlags(target) & 16 /* Anonymous */ && target.symbol && target.symbol.flags & 32 /* Class */);
+                        var symbol = isNonConstructorObject ? target.symbol : undefined;
+                        if (symbol) {
+                            if (ts.contains(symbolStack, symbol)) {
+                                return;
+                            }
+                            (symbolStack || (symbolStack = [])).push(symbol);
+                            inferFromObjectTypes(source, target);
+                            symbolStack.pop();
+                        }
+                        else {
+                            inferFromObjectTypes(source, target);
                         }
                     }
                 }
-                links.type = type;
             }
-            return links.type;
-        }
-        function getAnnotatedAccessorType(accessor) {
-            if (accessor) {
-                if (accessor.kind === 149 /* GetAccessor */) {
-                    return accessor.type && getTypeFromTypeNode(accessor.type);
+            function getInferenceInfoForType(type) {
+                if (type.flags & 540672 /* TypeVariable */) {
+                    for (var _i = 0, inferences_1 = inferences; _i < inferences_1.length; _i++) {
+                        var inference = inferences_1[_i];
+                        if (type === inference.typeParameter) {
+                            return inference;
+                        }
+                    }
                 }
-                else {
-                    var setterTypeAnnotation = ts.getSetAccessorTypeAnnotationNode(accessor);
-                    return setterTypeAnnotation && getTypeFromTypeNode(setterTypeAnnotation);
+                return undefined;
+            }
+            function inferFromObjectTypes(source, target) {
+                if (getObjectFlags(target) & 32 /* Mapped */) {
+                    var constraintType = getConstraintTypeFromMappedType(target);
+                    if (constraintType.flags & 262144 /* Index */) {
+                        // We're inferring from some source type S to a homomorphic mapped type { [P in keyof T]: X },
+                        // where T is a type variable. Use inferTypeForHomomorphicMappedType to infer a suitable source
+                        // type and then make a secondary inference from that type to T. We make a secondary inference
+                        // such that direct inferences to T get priority over inferences to Partial<T>, for example.
+                        var inference = getInferenceInfoForType(constraintType.type);
+                        if (inference && !inference.isFixed) {
+                            var inferredType = inferTypeForHomomorphicMappedType(source, target);
+                            if (inferredType) {
+                                var savePriority = priority;
+                                priority |= 2 /* MappedType */;
+                                inferFromTypes(inferredType, inference.typeParameter);
+                                priority = savePriority;
+                            }
+                        }
+                        return;
+                    }
+                    if (constraintType.flags & 16384 /* TypeParameter */) {
+                        // We're inferring from some source type S to a mapped type { [P in T]: X }, where T is a type
+                        // parameter. Infer from 'keyof S' to T and infer from a union of each property type in S to X.
+                        inferFromTypes(getIndexType(source), constraintType);
+                        inferFromTypes(getUnionType(ts.map(getPropertiesOfType(source), getTypeOfSymbol)), getTemplateTypeFromMappedType(target));
+                        return;
+                    }
                 }
+                inferFromProperties(source, target);
+                inferFromSignatures(source, target, 0 /* Call */);
+                inferFromSignatures(source, target, 1 /* Construct */);
+                inferFromIndexTypes(source, target);
             }
-            return undefined;
-        }
-        function getAnnotatedAccessorThisParameter(accessor) {
-            var parameter = getAccessorThisParameter(accessor);
-            return parameter && parameter.symbol;
-        }
-        function getThisTypeOfDeclaration(declaration) {
-            return getThisTypeOfSignature(getSignatureFromDeclaration(declaration));
-        }
-        function getTypeOfAccessors(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.type) {
-                var getter = ts.getDeclarationOfKind(symbol, 149 /* GetAccessor */);
-                var setter = ts.getDeclarationOfKind(symbol, 150 /* SetAccessor */);
-                if (getter && getter.flags & 1048576 /* JavaScriptFile */) {
-                    var jsDocType = getTypeForVariableLikeDeclarationFromJSDocComment(getter);
-                    if (jsDocType) {
-                        return links.type = jsDocType;
+            function inferFromProperties(source, target) {
+                var properties = getPropertiesOfObjectType(target);
+                for (var _i = 0, properties_5 = properties; _i < properties_5.length; _i++) {
+                    var targetProp = properties_5[_i];
+                    var sourceProp = getPropertyOfObjectType(source, targetProp.name);
+                    if (sourceProp) {
+                        inferFromTypes(getTypeOfSymbol(sourceProp), getTypeOfSymbol(targetProp));
                     }
                 }
-                if (!pushTypeResolution(symbol, 0 /* Type */)) {
-                    return unknownType;
+            }
+            function inferFromSignatures(source, target, kind) {
+                var sourceSignatures = getSignaturesOfType(source, kind);
+                var targetSignatures = getSignaturesOfType(target, kind);
+                var sourceLen = sourceSignatures.length;
+                var targetLen = targetSignatures.length;
+                var len = sourceLen < targetLen ? sourceLen : targetLen;
+                for (var i = 0; i < len; i++) {
+                    inferFromSignature(getErasedSignature(sourceSignatures[sourceLen - len + i]), getErasedSignature(targetSignatures[targetLen - len + i]));
                 }
-                var type = void 0;
-                // First try to see if the user specified a return type on the get-accessor.
-                var getterReturnType = getAnnotatedAccessorType(getter);
-                if (getterReturnType) {
-                    type = getterReturnType;
+            }
+            function inferFromParameterTypes(source, target) {
+                return inferFromTypes(source, target);
+            }
+            function inferFromSignature(source, target) {
+                forEachMatchingParameterType(source, target, inferFromParameterTypes);
+                if (source.typePredicate && target.typePredicate && source.typePredicate.kind === target.typePredicate.kind) {
+                    inferFromTypes(source.typePredicate.type, target.typePredicate.type);
                 }
                 else {
-                    // If the user didn't specify a return type, try to use the set-accessor's parameter type.
-                    var setterParameterType = getAnnotatedAccessorType(setter);
-                    if (setterParameterType) {
-                        type = setterParameterType;
-                    }
-                    else {
-                        // If there are no specified types, try to infer it from the body of the get accessor if it exists.
-                        if (getter && getter.body) {
-                            type = getReturnTypeFromBody(getter);
-                        }
-                        else {
-                            if (compilerOptions.noImplicitAny) {
-                                if (setter) {
-                                    error(setter, ts.Diagnostics.Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_parameter_type_annotation, symbolToString(symbol));
-                                }
-                                else {
-                                    ts.Debug.assert(!!getter, "there must existed getter as we are current checking either setter or getter in this function");
-                                    error(getter, ts.Diagnostics.Property_0_implicitly_has_type_any_because_its_get_accessor_lacks_a_return_type_annotation, symbolToString(symbol));
-                                }
-                            }
-                            type = anyType;
-                        }
+                    inferFromTypes(getReturnTypeOfSignature(source), getReturnTypeOfSignature(target));
+                }
+            }
+            function inferFromIndexTypes(source, target) {
+                var targetStringIndexType = getIndexTypeOfType(target, 0 /* String */);
+                if (targetStringIndexType) {
+                    var sourceIndexType = getIndexTypeOfType(source, 0 /* String */) ||
+                        getImplicitIndexTypeOfType(source, 0 /* String */);
+                    if (sourceIndexType) {
+                        inferFromTypes(sourceIndexType, targetStringIndexType);
                     }
                 }
-                if (!popTypeResolution()) {
-                    type = anyType;
-                    if (compilerOptions.noImplicitAny) {
-                        var getter_1 = ts.getDeclarationOfKind(symbol, 149 /* GetAccessor */);
-                        error(getter_1, ts.Diagnostics._0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions, symbolToString(symbol));
+                var targetNumberIndexType = getIndexTypeOfType(target, 1 /* Number */);
+                if (targetNumberIndexType) {
+                    var sourceIndexType = getIndexTypeOfType(source, 1 /* Number */) ||
+                        getIndexTypeOfType(source, 0 /* String */) ||
+                        getImplicitIndexTypeOfType(source, 1 /* Number */);
+                    if (sourceIndexType) {
+                        inferFromTypes(sourceIndexType, targetNumberIndexType);
                     }
                 }
-                links.type = type;
             }
-            return links.type;
         }
-        function getTypeOfFuncClassEnumModule(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.type) {
-                if (symbol.valueDeclaration.kind === 225 /* ModuleDeclaration */ && ts.isShorthandAmbientModuleSymbol(symbol)) {
-                    links.type = anyType;
-                }
-                else {
-                    var type = createObjectType(2097152 /* Anonymous */, symbol);
-                    links.type = strictNullChecks && symbol.flags & 536870912 /* Optional */ ?
-                        includeFalsyTypes(type, 2048 /* Undefined */) : type;
+        function typeIdenticalToSomeType(type, types) {
+            for (var _i = 0, types_11 = types; _i < types_11.length; _i++) {
+                var t = types_11[_i];
+                if (isTypeIdenticalTo(t, type)) {
+                    return true;
                 }
             }
-            return links.type;
+            return false;
         }
-        function getTypeOfEnumMember(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.type) {
-                links.type = getDeclaredTypeOfEnumMember(symbol);
+        /**
+         * Return a new union or intersection type computed by removing a given set of types
+         * from a given union or intersection type.
+         */
+        function removeTypesFromUnionOrIntersection(type, typesToRemove) {
+            var reducedTypes = [];
+            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                var t = _a[_i];
+                if (!typeIdenticalToSomeType(t, typesToRemove)) {
+                    reducedTypes.push(t);
+                }
             }
-            return links.type;
+            return type.flags & 65536 /* Union */ ? getUnionType(reducedTypes) : getIntersectionType(reducedTypes);
         }
-        function getTypeOfAlias(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.type) {
-                var targetSymbol = resolveAlias(symbol);
-                // It only makes sense to get the type of a value symbol. If the result of resolving
-                // the alias is not a value, then it has no type. To get the type associated with a
-                // type symbol, call getDeclaredTypeOfSymbol.
-                // This check is important because without it, a call to getTypeOfSymbol could end
-                // up recursively calling getTypeOfAlias, causing a stack overflow.
-                links.type = targetSymbol.flags & 107455 /* Value */
-                    ? getTypeOfSymbol(targetSymbol)
-                    : unknownType;
+        function hasPrimitiveConstraint(type) {
+            var constraint = getConstraintOfTypeParameter(type);
+            return constraint && maybeTypeOfKind(constraint, 8190 /* Primitive */ | 262144 /* Index */);
+        }
+        function getInferredType(context, index) {
+            var inference = context.inferences[index];
+            var inferredType = inference.inferredType;
+            if (!inferredType) {
+                if (inference.candidates) {
+                    // We widen inferred literal types if
+                    // all inferences were made to top-level ocurrences of the type parameter, and
+                    // the type parameter has no constraint or its constraint includes no primitive or literal types, and
+                    // the type parameter was fixed during inference or does not occur at top-level in the return type.
+                    var signature = context.signature;
+                    var widenLiteralTypes = inference.topLevel &&
+                        !hasPrimitiveConstraint(inference.typeParameter) &&
+                        (inference.isFixed || !isTypeParameterAtTopLevel(getReturnTypeOfSignature(signature), inference.typeParameter));
+                    var baseCandidates = widenLiteralTypes ? ts.sameMap(inference.candidates, getWidenedLiteralType) : inference.candidates;
+                    // Infer widened union or supertype, or the unknown type for no common supertype. We infer union types
+                    // for inferences coming from return types in order to avoid common supertype failures.
+                    var unionOrSuperType = context.flags & 1 /* InferUnionTypes */ || inference.priority & 4 /* ReturnType */ ?
+                        getUnionType(baseCandidates, /*subtypeReduction*/ true) : getCommonSupertype(baseCandidates);
+                    inferredType = getWidenedType(unionOrSuperType);
+                }
+                else if (context.flags & 2 /* NoDefault */) {
+                    // We use silentNeverType as the wildcard that signals no inferences.
+                    inferredType = silentNeverType;
+                }
+                else {
+                    // Infer either the default or the empty object type when no inferences were
+                    // made. It is important to remember that in this case, inference still
+                    // succeeds, meaning there is no error for not having inference candidates. An
+                    // inference error only occurs when there are *conflicting* candidates, i.e.
+                    // candidates with no common supertype.
+                    var defaultType = getDefaultFromTypeParameter(inference.typeParameter);
+                    if (defaultType) {
+                        // Instantiate the default type. Any forward reference to a type
+                        // parameter should be instantiated to the empty object type.
+                        inferredType = instantiateType(defaultType, combineTypeMappers(createBackreferenceMapper(context.signature.typeParameters, index), context));
+                    }
+                    else {
+                        inferredType = context.flags & 4 /* AnyDefault */ ? anyType : emptyObjectType;
+                    }
+                }
+                inference.inferredType = inferredType;
+                var constraint = getConstraintOfTypeParameter(context.signature.typeParameters[index]);
+                if (constraint) {
+                    var instantiatedConstraint = instantiateType(constraint, context);
+                    if (!isTypeAssignableTo(inferredType, getTypeWithThisArgument(instantiatedConstraint, inferredType))) {
+                        inference.inferredType = inferredType = instantiatedConstraint;
+                    }
+                }
             }
-            return links.type;
+            return inferredType;
         }
-        function getTypeOfInstantiatedSymbol(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.type) {
-                links.type = instantiateType(getTypeOfSymbol(links.target), links.mapper);
+        function getInferredTypes(context) {
+            var result = [];
+            for (var i = 0; i < context.inferences.length; i++) {
+                result.push(getInferredType(context, i));
             }
-            return links.type;
+            return result;
         }
-        function getTypeOfSymbol(symbol) {
-            if (symbol.flags & 16777216 /* Instantiated */) {
-                return getTypeOfInstantiatedSymbol(symbol);
-            }
-            if (symbol.flags & (3 /* Variable */ | 4 /* Property */)) {
-                return getTypeOfVariableOrParameterOrProperty(symbol);
-            }
-            if (symbol.flags & (16 /* Function */ | 8192 /* Method */ | 32 /* Class */ | 384 /* Enum */ | 512 /* ValueModule */)) {
-                return getTypeOfFuncClassEnumModule(symbol);
+        // EXPRESSION TYPE CHECKING
+        function getResolvedSymbol(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedSymbol) {
+                links.resolvedSymbol = !ts.nodeIsMissing(node) && resolveName(node, node.text, 107455 /* Value */ | 1048576 /* ExportValue */, ts.Diagnostics.Cannot_find_name_0, node, ts.Diagnostics.Cannot_find_name_0_Did_you_mean_1) || unknownSymbol;
             }
-            if (symbol.flags & 8 /* EnumMember */) {
-                return getTypeOfEnumMember(symbol);
+            return links.resolvedSymbol;
+        }
+        function isInTypeQuery(node) {
+            // TypeScript 1.0 spec (April 2014): 3.6.3
+            // A type query consists of the keyword typeof followed by an expression.
+            // The expression is restricted to a single identifier or a sequence of identifiers separated by periods
+            return !!ts.findAncestor(node, function (n) { return n.kind === 162 /* TypeQuery */ ? true : n.kind === 71 /* Identifier */ || n.kind === 143 /* QualifiedName */ ? false : "quit"; });
+        }
+        // Return the flow cache key for a "dotted name" (i.e. a sequence of identifiers
+        // separated by dots). The key consists of the id of the symbol referenced by the
+        // leftmost identifier followed by zero or more property names separated by dots.
+        // The result is undefined if the reference isn't a dotted name. We prefix nodes
+        // occurring in an apparent type position with '@' because the control flow type
+        // of such nodes may be based on the apparent type instead of the declared type.
+        function getFlowCacheKey(node) {
+            if (node.kind === 71 /* Identifier */) {
+                var symbol = getResolvedSymbol(node);
+                return symbol !== unknownSymbol ? (isApparentTypePosition(node) ? "@" : "") + getSymbolId(symbol) : undefined;
             }
-            if (symbol.flags & 98304 /* Accessor */) {
-                return getTypeOfAccessors(symbol);
+            if (node.kind === 99 /* ThisKeyword */) {
+                return "0";
             }
-            if (symbol.flags & 8388608 /* Alias */) {
-                return getTypeOfAlias(symbol);
+            if (node.kind === 179 /* PropertyAccessExpression */) {
+                var key = getFlowCacheKey(node.expression);
+                return key && key + "." + node.name.text;
             }
-            return unknownType;
+            return undefined;
         }
-        function getTargetType(type) {
-            return type.flags & 131072 /* Reference */ ? type.target : type;
+        function getLeftmostIdentifierOrThis(node) {
+            switch (node.kind) {
+                case 71 /* Identifier */:
+                case 99 /* ThisKeyword */:
+                    return node;
+                case 179 /* PropertyAccessExpression */:
+                    return getLeftmostIdentifierOrThis(node.expression);
+            }
+            return undefined;
         }
-        function hasBaseType(type, checkBase) {
-            return check(type);
-            function check(type) {
-                var target = getTargetType(type);
-                return target === checkBase || ts.forEach(getBaseTypes(target), check);
+        function isMatchingReference(source, target) {
+            switch (source.kind) {
+                case 71 /* Identifier */:
+                    return target.kind === 71 /* Identifier */ && getResolvedSymbol(source) === getResolvedSymbol(target) ||
+                        (target.kind === 226 /* VariableDeclaration */ || target.kind === 176 /* BindingElement */) &&
+                            getExportSymbolOfValueSymbolIfExported(getResolvedSymbol(source)) === getSymbolOfNode(target);
+                case 99 /* ThisKeyword */:
+                    return target.kind === 99 /* ThisKeyword */;
+                case 97 /* SuperKeyword */:
+                    return target.kind === 97 /* SuperKeyword */;
+                case 179 /* PropertyAccessExpression */:
+                    return target.kind === 179 /* PropertyAccessExpression */ &&
+                        source.name.text === target.name.text &&
+                        isMatchingReference(source.expression, target.expression);
             }
+            return false;
         }
-        // Appends the type parameters given by a list of declarations to a set of type parameters and returns the resulting set.
-        // The function allocates a new array if the input type parameter set is undefined, but otherwise it modifies the set
-        // in-place and returns the same array.
-        function appendTypeParameters(typeParameters, declarations) {
-            for (var _i = 0, declarations_2 = declarations; _i < declarations_2.length; _i++) {
-                var declaration = declarations_2[_i];
-                var tp = getDeclaredTypeOfTypeParameter(getSymbolOfNode(declaration));
-                if (!typeParameters) {
-                    typeParameters = [tp];
-                }
-                else if (!ts.contains(typeParameters, tp)) {
-                    typeParameters.push(tp);
+        function containsMatchingReference(source, target) {
+            while (source.kind === 179 /* PropertyAccessExpression */) {
+                source = source.expression;
+                if (isMatchingReference(source, target)) {
+                    return true;
                 }
             }
-            return typeParameters;
+            return false;
         }
-        // Appends the outer type parameters of a node to a set of type parameters and returns the resulting set. The function
-        // allocates a new array if the input type parameter set is undefined, but otherwise it modifies the set in-place and
-        // returns the same array.
-        function appendOuterTypeParameters(typeParameters, node) {
-            while (true) {
-                node = node.parent;
-                if (!node) {
-                    return typeParameters;
-                }
-                if (node.kind === 221 /* ClassDeclaration */ || node.kind === 192 /* ClassExpression */ ||
-                    node.kind === 220 /* FunctionDeclaration */ || node.kind === 179 /* FunctionExpression */ ||
-                    node.kind === 147 /* MethodDeclaration */ || node.kind === 180 /* ArrowFunction */) {
-                    var declarations = node.typeParameters;
-                    if (declarations) {
-                        return appendTypeParameters(appendOuterTypeParameters(typeParameters, node), declarations);
+        // Return true if target is a property access xxx.yyy, source is a property access xxx.zzz, the declared
+        // type of xxx is a union type, and yyy is a property that is possibly a discriminant. We consider a property
+        // a possible discriminant if its type differs in the constituents of containing union type, and if every
+        // choice is a unit type or a union of unit types.
+        function containsMatchingReferenceDiscriminant(source, target) {
+            return target.kind === 179 /* PropertyAccessExpression */ &&
+                containsMatchingReference(source, target.expression) &&
+                isDiscriminantProperty(getDeclaredTypeOfReference(target.expression), target.name.text);
+        }
+        function getDeclaredTypeOfReference(expr) {
+            if (expr.kind === 71 /* Identifier */) {
+                return getTypeOfSymbol(getResolvedSymbol(expr));
+            }
+            if (expr.kind === 179 /* PropertyAccessExpression */) {
+                var type = getDeclaredTypeOfReference(expr.expression);
+                return type && getTypeOfPropertyOfType(type, expr.name.text);
+            }
+            return undefined;
+        }
+        function isDiscriminantProperty(type, name) {
+            if (type && type.flags & 65536 /* Union */) {
+                var prop = getUnionOrIntersectionProperty(type, name);
+                if (prop && ts.getCheckFlags(prop) & 2 /* SyntheticProperty */) {
+                    if (prop.isDiscriminantProperty === undefined) {
+                        prop.isDiscriminantProperty = prop.checkFlags & 32 /* HasNonUniformType */ && isLiteralType(getTypeOfSymbol(prop));
                     }
+                    return prop.isDiscriminantProperty;
                 }
             }
+            return false;
         }
-        // The outer type parameters are those defined by enclosing generic classes, methods, or functions.
-        function getOuterTypeParametersOfClassOrInterface(symbol) {
-            var declaration = symbol.flags & 32 /* Class */ ? symbol.valueDeclaration : ts.getDeclarationOfKind(symbol, 222 /* InterfaceDeclaration */);
-            return appendOuterTypeParameters(undefined, declaration);
+        function isOrContainsMatchingReference(source, target) {
+            return isMatchingReference(source, target) || containsMatchingReference(source, target);
         }
-        // The local type parameters are the combined set of type parameters from all declarations of the class,
-        // interface, or type alias.
-        function getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol) {
-            var result;
-            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                var node = _a[_i];
-                if (node.kind === 222 /* InterfaceDeclaration */ || node.kind === 221 /* ClassDeclaration */ ||
-                    node.kind === 192 /* ClassExpression */ || node.kind === 223 /* TypeAliasDeclaration */) {
-                    var declaration = node;
-                    if (declaration.typeParameters) {
-                        result = appendTypeParameters(result, declaration.typeParameters);
+        function hasMatchingArgument(callExpression, reference) {
+            if (callExpression.arguments) {
+                for (var _i = 0, _a = callExpression.arguments; _i < _a.length; _i++) {
+                    var argument = _a[_i];
+                    if (isOrContainsMatchingReference(reference, argument)) {
+                        return true;
                     }
                 }
             }
-            return result;
-        }
-        // The full set of type parameters for a generic class or interface type consists of its outer type parameters plus
-        // its locally declared type parameters.
-        function getTypeParametersOfClassOrInterface(symbol) {
-            return ts.concatenate(getOuterTypeParametersOfClassOrInterface(symbol), getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol));
-        }
-        function isConstructorType(type) {
-            return type.flags & 2588672 /* ObjectType */ && getSignaturesOfType(type, 1 /* Construct */).length > 0;
-        }
-        function getBaseTypeNodeOfClass(type) {
-            return ts.getClassExtendsHeritageClauseElement(type.symbol.valueDeclaration);
-        }
-        function getConstructorsForTypeArguments(type, typeArgumentNodes) {
-            var typeArgCount = typeArgumentNodes ? typeArgumentNodes.length : 0;
-            return ts.filter(getSignaturesOfType(type, 1 /* Construct */), function (sig) { return (sig.typeParameters ? sig.typeParameters.length : 0) === typeArgCount; });
+            if (callExpression.expression.kind === 179 /* PropertyAccessExpression */ &&
+                isOrContainsMatchingReference(reference, callExpression.expression.expression)) {
+                return true;
+            }
+            return false;
         }
-        function getInstantiatedConstructorsForTypeArguments(type, typeArgumentNodes) {
-            var signatures = getConstructorsForTypeArguments(type, typeArgumentNodes);
-            if (typeArgumentNodes) {
-                var typeArguments_1 = ts.map(typeArgumentNodes, getTypeFromTypeNodeNoAlias);
-                signatures = ts.map(signatures, function (sig) { return getSignatureInstantiation(sig, typeArguments_1); });
+        function getFlowNodeId(flow) {
+            if (!flow.id) {
+                flow.id = nextFlowId;
+                nextFlowId++;
             }
-            return signatures;
+            return flow.id;
         }
-        // The base constructor of a class can resolve to
-        // undefinedType if the class has no extends clause,
-        // unknownType if an error occurred during resolution of the extends expression,
-        // nullType if the extends expression is the null value, or
-        // an object type with at least one construct signature.
-        function getBaseConstructorTypeOfClass(type) {
-            if (!type.resolvedBaseConstructorType) {
-                var baseTypeNode = getBaseTypeNodeOfClass(type);
-                if (!baseTypeNode) {
-                    return type.resolvedBaseConstructorType = undefinedType;
-                }
-                if (!pushTypeResolution(type, 1 /* ResolvedBaseConstructorType */)) {
-                    return unknownType;
-                }
-                var baseConstructorType = checkExpression(baseTypeNode.expression);
-                if (baseConstructorType.flags & 2588672 /* ObjectType */) {
-                    // Resolving the members of a class requires us to resolve the base class of that class.
-                    // We force resolution here such that we catch circularities now.
-                    resolveStructuredTypeMembers(baseConstructorType);
-                }
-                if (!popTypeResolution()) {
-                    error(type.symbol.valueDeclaration, ts.Diagnostics._0_is_referenced_directly_or_indirectly_in_its_own_base_expression, symbolToString(type.symbol));
-                    return type.resolvedBaseConstructorType = unknownType;
-                }
-                if (baseConstructorType !== unknownType && baseConstructorType !== nullWideningType && !isConstructorType(baseConstructorType)) {
-                    error(baseTypeNode.expression, ts.Diagnostics.Type_0_is_not_a_constructor_function_type, typeToString(baseConstructorType));
-                    return type.resolvedBaseConstructorType = unknownType;
+        function typeMaybeAssignableTo(source, target) {
+            if (!(source.flags & 65536 /* Union */)) {
+                return isTypeAssignableTo(source, target);
+            }
+            for (var _i = 0, _a = source.types; _i < _a.length; _i++) {
+                var t = _a[_i];
+                if (isTypeAssignableTo(t, target)) {
+                    return true;
                 }
-                type.resolvedBaseConstructorType = baseConstructorType;
             }
-            return type.resolvedBaseConstructorType;
+            return false;
         }
-        function getBaseTypes(type) {
-            if (!type.resolvedBaseTypes) {
-                if (type.flags & 262144 /* Tuple */) {
-                    type.resolvedBaseTypes = [createArrayType(getUnionType(type.typeParameters))];
-                }
-                else if (type.symbol.flags & (32 /* Class */ | 64 /* Interface */)) {
-                    if (type.symbol.flags & 32 /* Class */) {
-                        resolveBaseTypesOfClass(type);
-                    }
-                    if (type.symbol.flags & 64 /* Interface */) {
-                        resolveBaseTypesOfInterface(type);
-                    }
+        // Remove those constituent types of declaredType to which no constituent type of assignedType is assignable.
+        // For example, when a variable of type number | string | boolean is assigned a value of type number | boolean,
+        // we remove type string.
+        function getAssignmentReducedType(declaredType, assignedType) {
+            if (declaredType !== assignedType) {
+                if (assignedType.flags & 8192 /* Never */) {
+                    return assignedType;
                 }
-                else {
-                    ts.Debug.fail("type must be class or interface");
+                var reducedType = filterType(declaredType, function (t) { return typeMaybeAssignableTo(assignedType, t); });
+                if (!(reducedType.flags & 8192 /* Never */)) {
+                    return reducedType;
                 }
             }
-            return type.resolvedBaseTypes;
+            return declaredType;
         }
-        function resolveBaseTypesOfClass(type) {
-            type.resolvedBaseTypes = type.resolvedBaseTypes || emptyArray;
-            var baseConstructorType = getBaseConstructorTypeOfClass(type);
-            if (!(baseConstructorType.flags & 2588672 /* ObjectType */)) {
-                return;
+        function getTypeFactsOfTypes(types) {
+            var result = 0 /* None */;
+            for (var _i = 0, types_12 = types; _i < types_12.length; _i++) {
+                var t = types_12[_i];
+                result |= getTypeFacts(t);
             }
-            var baseTypeNode = getBaseTypeNodeOfClass(type);
-            var baseType;
-            var originalBaseType = baseConstructorType && baseConstructorType.symbol ? getDeclaredTypeOfSymbol(baseConstructorType.symbol) : undefined;
-            if (baseConstructorType.symbol && baseConstructorType.symbol.flags & 32 /* Class */ &&
-                areAllOuterTypeParametersApplied(originalBaseType)) {
-                // When base constructor type is a class with no captured type arguments we know that the constructors all have the same type parameters as the
-                // class and all return the instance type of the class. There is no need for further checks and we can apply the
-                // type arguments in the same manner as a type reference to get the same error reporting experience.
-                baseType = getTypeFromClassOrInterfaceReference(baseTypeNode, baseConstructorType.symbol);
+            return result;
+        }
+        function isFunctionObjectType(type) {
+            // We do a quick check for a "bind" property before performing the more expensive subtype
+            // check. This gives us a quicker out in the common case where an object type is not a function.
+            var resolved = resolveStructuredTypeMembers(type);
+            return !!(resolved.callSignatures.length || resolved.constructSignatures.length ||
+                resolved.members.get("bind") && isTypeSubtypeOf(type, globalFunctionType));
+        }
+        function getTypeFacts(type) {
+            var flags = type.flags;
+            if (flags & 2 /* String */) {
+                return strictNullChecks ? 4079361 /* StringStrictFacts */ : 4194049 /* StringFacts */;
             }
-            else {
-                // The class derives from a "class-like" constructor function, check that we have at least one construct signature
-                // with a matching number of type parameters and use the return type of the first instantiated signature. Elsewhere
-                // we check that all instantiated signatures return the same type.
-                var constructors = getInstantiatedConstructorsForTypeArguments(baseConstructorType, baseTypeNode.typeArguments);
-                if (!constructors.length) {
-                    error(baseTypeNode.expression, ts.Diagnostics.No_base_constructor_has_the_specified_number_of_type_arguments);
-                    return;
-                }
-                baseType = getReturnTypeOfSignature(constructors[0]);
+            if (flags & 32 /* StringLiteral */) {
+                var isEmpty = type.value === "";
+                return strictNullChecks ?
+                    isEmpty ? 3030785 /* EmptyStringStrictFacts */ : 1982209 /* NonEmptyStringStrictFacts */ :
+                    isEmpty ? 3145473 /* EmptyStringFacts */ : 4194049 /* NonEmptyStringFacts */;
             }
-            if (baseType === unknownType) {
-                return;
+            if (flags & (4 /* Number */ | 16 /* Enum */)) {
+                return strictNullChecks ? 4079234 /* NumberStrictFacts */ : 4193922 /* NumberFacts */;
             }
-            if (!(getTargetType(baseType).flags & (32768 /* Class */ | 65536 /* Interface */))) {
-                error(baseTypeNode.expression, ts.Diagnostics.Base_constructor_return_type_0_is_not_a_class_or_interface_type, typeToString(baseType));
-                return;
+            if (flags & 64 /* NumberLiteral */) {
+                var isZero = type.value === 0;
+                return strictNullChecks ?
+                    isZero ? 3030658 /* ZeroStrictFacts */ : 1982082 /* NonZeroStrictFacts */ :
+                    isZero ? 3145346 /* ZeroFacts */ : 4193922 /* NonZeroFacts */;
             }
-            if (type === baseType || hasBaseType(baseType, type)) {
-                error(type.symbol.valueDeclaration, ts.Diagnostics.Type_0_recursively_references_itself_as_a_base_type, typeToString(type, /*enclosingDeclaration*/ undefined, 1 /* WriteArrayAsGenericType */));
-                return;
+            if (flags & 8 /* Boolean */) {
+                return strictNullChecks ? 4078980 /* BooleanStrictFacts */ : 4193668 /* BooleanFacts */;
             }
-            if (type.resolvedBaseTypes === emptyArray) {
-                type.resolvedBaseTypes = [baseType];
+            if (flags & 136 /* BooleanLike */) {
+                return strictNullChecks ?
+                    type === falseType ? 3030404 /* FalseStrictFacts */ : 1981828 /* TrueStrictFacts */ :
+                    type === falseType ? 3145092 /* FalseFacts */ : 4193668 /* TrueFacts */;
             }
-            else {
-                type.resolvedBaseTypes.push(baseType);
+            if (flags & 32768 /* Object */) {
+                return isFunctionObjectType(type) ?
+                    strictNullChecks ? 6164448 /* FunctionStrictFacts */ : 8376288 /* FunctionFacts */ :
+                    strictNullChecks ? 6166480 /* ObjectStrictFacts */ : 8378320 /* ObjectFacts */;
             }
-        }
-        function areAllOuterTypeParametersApplied(type) {
-            // An unapplied type parameter has its symbol still the same as the matching argument symbol.
-            // Since parameters are applied outer-to-inner, only the last outer parameter needs to be checked.
-            var outerTypeParameters = type.outerTypeParameters;
-            if (outerTypeParameters) {
-                var last = outerTypeParameters.length - 1;
-                var typeArguments = type.typeArguments;
-                return outerTypeParameters[last].symbol !== typeArguments[last].symbol;
+            if (flags & (1024 /* Void */ | 2048 /* Undefined */)) {
+                return 2457472 /* UndefinedFacts */;
             }
-            return true;
-        }
-        function resolveBaseTypesOfInterface(type) {
-            type.resolvedBaseTypes = type.resolvedBaseTypes || emptyArray;
-            for (var _i = 0, _a = type.symbol.declarations; _i < _a.length; _i++) {
-                var declaration = _a[_i];
-                if (declaration.kind === 222 /* InterfaceDeclaration */ && ts.getInterfaceBaseTypeNodes(declaration)) {
-                    for (var _b = 0, _c = ts.getInterfaceBaseTypeNodes(declaration); _b < _c.length; _b++) {
-                        var node = _c[_b];
-                        var baseType = getTypeFromTypeNode(node);
-                        if (baseType !== unknownType) {
-                            if (getTargetType(baseType).flags & (32768 /* Class */ | 65536 /* Interface */)) {
-                                if (type !== baseType && !hasBaseType(baseType, type)) {
-                                    if (type.resolvedBaseTypes === emptyArray) {
-                                        type.resolvedBaseTypes = [baseType];
-                                    }
-                                    else {
-                                        type.resolvedBaseTypes.push(baseType);
-                                    }
-                                }
-                                else {
-                                    error(declaration, ts.Diagnostics.Type_0_recursively_references_itself_as_a_base_type, typeToString(type, /*enclosingDeclaration*/ undefined, 1 /* WriteArrayAsGenericType */));
-                                }
-                            }
-                            else {
-                                error(node, ts.Diagnostics.An_interface_may_only_extend_a_class_or_another_interface);
-                            }
-                        }
-                    }
-                }
+            if (flags & 4096 /* Null */) {
+                return 2340752 /* NullFacts */;
             }
-        }
-        // Returns true if the interface given by the symbol is free of "this" references. Specifically, the result is
-        // true if the interface itself contains no references to "this" in its body, if all base types are interfaces,
-        // and if none of the base interfaces have a "this" type.
-        function isIndependentInterface(symbol) {
-            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                var declaration = _a[_i];
-                if (declaration.kind === 222 /* InterfaceDeclaration */) {
-                    if (declaration.flags & 64 /* ContainsThis */) {
-                        return false;
-                    }
-                    var baseTypeNodes = ts.getInterfaceBaseTypeNodes(declaration);
-                    if (baseTypeNodes) {
-                        for (var _b = 0, baseTypeNodes_1 = baseTypeNodes; _b < baseTypeNodes_1.length; _b++) {
-                            var node = baseTypeNodes_1[_b];
-                            if (ts.isEntityNameExpression(node.expression)) {
-                                var baseSymbol = resolveEntityName(node.expression, 793064 /* Type */, /*ignoreErrors*/ true);
-                                if (!baseSymbol || !(baseSymbol.flags & 64 /* Interface */) || getDeclaredTypeOfClassOrInterface(baseSymbol).thisType) {
-                                    return false;
-                                }
-                            }
-                        }
-                    }
-                }
+            if (flags & 512 /* ESSymbol */) {
+                return strictNullChecks ? 1981320 /* SymbolStrictFacts */ : 4193160 /* SymbolFacts */;
             }
-            return true;
-        }
-        function getDeclaredTypeOfClassOrInterface(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.declaredType) {
-                var kind = symbol.flags & 32 /* Class */ ? 32768 /* Class */ : 65536 /* Interface */;
-                var type = links.declaredType = createObjectType(kind, symbol);
-                var outerTypeParameters = getOuterTypeParametersOfClassOrInterface(symbol);
-                var localTypeParameters = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol);
-                // A class or interface is generic if it has type parameters or a "this" type. We always give classes a "this" type
-                // because it is not feasible to analyze all members to determine if the "this" type escapes the class (in particular,
-                // property types inferred from initializers and method return types inferred from return statements are very hard
-                // to exhaustively analyze). We give interfaces a "this" type if we can't definitely determine that they are free of
-                // "this" references.
-                if (outerTypeParameters || localTypeParameters || kind === 32768 /* Class */ || !isIndependentInterface(symbol)) {
-                    type.flags |= 131072 /* Reference */;
-                    type.typeParameters = ts.concatenate(outerTypeParameters, localTypeParameters);
-                    type.outerTypeParameters = outerTypeParameters;
-                    type.localTypeParameters = localTypeParameters;
-                    type.instantiations = ts.createMap();
-                    type.instantiations[getTypeListId(type.typeParameters)] = type;
-                    type.target = type;
-                    type.typeArguments = type.typeParameters;
-                    type.thisType = createType(16384 /* TypeParameter */ | 268435456 /* ThisType */);
-                    type.thisType.symbol = symbol;
-                    type.thisType.constraint = type;
-                }
+            if (flags & 16777216 /* NonPrimitive */) {
+                return strictNullChecks ? 6166480 /* ObjectStrictFacts */ : 8378320 /* ObjectFacts */;
             }
-            return links.declaredType;
-        }
-        function getDeclaredTypeOfTypeAlias(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.declaredType) {
-                // Note that we use the links object as the target here because the symbol object is used as the unique
-                // identity for resolution of the 'type' property in SymbolLinks.
-                if (!pushTypeResolution(symbol, 2 /* DeclaredType */)) {
-                    return unknownType;
-                }
-                var typeParameters = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol);
-                var declaration = ts.getDeclarationOfKind(symbol, 279 /* JSDocTypedefTag */);
-                var type = void 0;
-                if (declaration) {
-                    if (declaration.jsDocTypeLiteral) {
-                        type = getTypeFromTypeNode(declaration.jsDocTypeLiteral);
-                    }
-                    else {
-                        type = getTypeFromTypeNode(declaration.typeExpression.type);
-                    }
-                }
-                else {
-                    declaration = ts.getDeclarationOfKind(symbol, 223 /* TypeAliasDeclaration */);
-                    type = getTypeFromTypeNode(declaration.type, symbol, typeParameters);
-                }
-                if (popTypeResolution()) {
-                    links.typeParameters = typeParameters;
-                    if (typeParameters) {
-                        // Initialize the instantiation cache for generic type aliases. The declared type corresponds to
-                        // an instantiation of the type alias with the type parameters supplied as type arguments.
-                        links.instantiations = ts.createMap();
-                        links.instantiations[getTypeListId(links.typeParameters)] = type;
-                    }
-                }
-                else {
-                    type = unknownType;
-                    error(declaration.name, ts.Diagnostics.Type_alias_0_circularly_references_itself, symbolToString(symbol));
-                }
-                links.declaredType = type;
+            if (flags & 540672 /* TypeVariable */) {
+                return getTypeFacts(getBaseConstraintOfType(type) || emptyObjectType);
             }
-            return links.declaredType;
-        }
-        function isLiteralEnumMember(symbol, member) {
-            var expr = member.initializer;
-            if (!expr) {
-                return !ts.isInAmbientContext(member);
+            if (flags & 196608 /* UnionOrIntersection */) {
+                return getTypeFactsOfTypes(type.types);
             }
-            return expr.kind === 8 /* NumericLiteral */ ||
-                expr.kind === 185 /* PrefixUnaryExpression */ && expr.operator === 36 /* MinusToken */ &&
-                    expr.operand.kind === 8 /* NumericLiteral */ ||
-                expr.kind === 69 /* Identifier */ && !!symbol.exports[expr.text];
+            return 8388607 /* All */;
         }
-        function enumHasLiteralMembers(symbol) {
-            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                var declaration = _a[_i];
-                if (declaration.kind === 224 /* EnumDeclaration */) {
-                    for (var _b = 0, _c = declaration.members; _b < _c.length; _b++) {
-                        var member = _c[_b];
-                        if (!isLiteralEnumMember(symbol, member)) {
-                            return false;
-                        }
-                    }
-                }
-            }
-            return true;
+        function getTypeWithFacts(type, include) {
+            return filterType(type, function (t) { return (getTypeFacts(t) & include) !== 0; });
         }
-        function createEnumLiteralType(symbol, baseType, text) {
-            var type = createType(256 /* EnumLiteral */);
-            type.symbol = symbol;
-            type.baseType = baseType;
-            type.text = text;
+        function getTypeWithDefault(type, defaultExpression) {
+            if (defaultExpression) {
+                var defaultType = getTypeOfExpression(defaultExpression);
+                return getUnionType([getTypeWithFacts(type, 131072 /* NEUndefined */), defaultType]);
+            }
             return type;
         }
-        function getDeclaredTypeOfEnum(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.declaredType) {
-                var enumType = links.declaredType = createType(16 /* Enum */);
-                enumType.symbol = symbol;
-                if (enumHasLiteralMembers(symbol)) {
-                    var memberTypeList = [];
-                    var memberTypes = ts.createMap();
-                    for (var _i = 0, _a = enumType.symbol.declarations; _i < _a.length; _i++) {
-                        var declaration = _a[_i];
-                        if (declaration.kind === 224 /* EnumDeclaration */) {
-                            computeEnumMemberValues(declaration);
-                            for (var _b = 0, _c = declaration.members; _b < _c.length; _b++) {
-                                var member = _c[_b];
-                                var memberSymbol = getSymbolOfNode(member);
-                                var value = getEnumMemberValue(member);
-                                if (!memberTypes[value]) {
-                                    var memberType = memberTypes[value] = createEnumLiteralType(memberSymbol, enumType, "" + value);
-                                    memberTypeList.push(memberType);
-                                }
-                            }
-                        }
-                    }
-                    enumType.memberTypes = memberTypes;
-                    if (memberTypeList.length > 1) {
-                        enumType.flags |= 524288 /* Union */;
-                        enumType.types = memberTypeList;
-                        unionTypes[getTypeListId(memberTypeList)] = enumType;
-                    }
-                }
-            }
-            return links.declaredType;
+        function getTypeOfDestructuredProperty(type, name) {
+            var text = ts.getTextOfPropertyName(name);
+            return getTypeOfPropertyOfType(type, text) ||
+                isNumericLiteralName(text) && getIndexTypeOfType(type, 1 /* Number */) ||
+                getIndexTypeOfType(type, 0 /* String */) ||
+                unknownType;
         }
-        function getDeclaredTypeOfEnumMember(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.declaredType) {
-                var enumType = getDeclaredTypeOfEnum(getParentOfSymbol(symbol));
-                links.declaredType = enumType.flags & 524288 /* Union */ ?
-                    enumType.memberTypes[getEnumMemberValue(symbol.valueDeclaration)] :
-                    enumType;
-            }
-            return links.declaredType;
+        function getTypeOfDestructuredArrayElement(type, index) {
+            return isTupleLikeType(type) && getTypeOfPropertyOfType(type, "" + index) ||
+                checkIteratedTypeOrElementType(type, /*errorNode*/ undefined, /*allowStringInput*/ false, /*allowAsyncIterables*/ false) ||
+                unknownType;
         }
-        function getDeclaredTypeOfTypeParameter(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.declaredType) {
-                var type = createType(16384 /* TypeParameter */);
-                type.symbol = symbol;
-                if (!ts.getDeclarationOfKind(symbol, 141 /* TypeParameter */).constraint) {
-                    type.constraint = noConstraintType;
-                }
-                links.declaredType = type;
-            }
-            return links.declaredType;
+        function getTypeOfDestructuredSpreadExpression(type) {
+            return createArrayType(checkIteratedTypeOrElementType(type, /*errorNode*/ undefined, /*allowStringInput*/ false, /*allowAsyncIterables*/ false) || unknownType);
         }
-        function getDeclaredTypeOfAlias(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.declaredType) {
-                links.declaredType = getDeclaredTypeOfSymbol(resolveAlias(symbol));
-            }
-            return links.declaredType;
+        function getAssignedTypeOfBinaryExpression(node) {
+            var isDestructuringDefaultAssignment = node.parent.kind === 177 /* ArrayLiteralExpression */ && isDestructuringAssignmentTarget(node.parent) ||
+                node.parent.kind === 261 /* PropertyAssignment */ && isDestructuringAssignmentTarget(node.parent.parent);
+            return isDestructuringDefaultAssignment ?
+                getTypeWithDefault(getAssignedType(node), node.right) :
+                getTypeOfExpression(node.right);
         }
-        function getDeclaredTypeOfSymbol(symbol) {
-            ts.Debug.assert((symbol.flags & 16777216 /* Instantiated */) === 0);
-            if (symbol.flags & (32 /* Class */ | 64 /* Interface */)) {
-                return getDeclaredTypeOfClassOrInterface(symbol);
-            }
-            if (symbol.flags & 524288 /* TypeAlias */) {
-                return getDeclaredTypeOfTypeAlias(symbol);
-            }
-            if (symbol.flags & 262144 /* TypeParameter */) {
-                return getDeclaredTypeOfTypeParameter(symbol);
-            }
-            if (symbol.flags & 384 /* Enum */) {
-                return getDeclaredTypeOfEnum(symbol);
+        function isDestructuringAssignmentTarget(parent) {
+            return parent.parent.kind === 194 /* BinaryExpression */ && parent.parent.left === parent ||
+                parent.parent.kind === 216 /* ForOfStatement */ && parent.parent.initializer === parent;
+        }
+        function getAssignedTypeOfArrayLiteralElement(node, element) {
+            return getTypeOfDestructuredArrayElement(getAssignedType(node), ts.indexOf(node.elements, element));
+        }
+        function getAssignedTypeOfSpreadExpression(node) {
+            return getTypeOfDestructuredSpreadExpression(getAssignedType(node.parent));
+        }
+        function getAssignedTypeOfPropertyAssignment(node) {
+            return getTypeOfDestructuredProperty(getAssignedType(node.parent), node.name);
+        }
+        function getAssignedTypeOfShorthandPropertyAssignment(node) {
+            return getTypeWithDefault(getAssignedTypeOfPropertyAssignment(node), node.objectAssignmentInitializer);
+        }
+        function getAssignedType(node) {
+            var parent = node.parent;
+            switch (parent.kind) {
+                case 215 /* ForInStatement */:
+                    return stringType;
+                case 216 /* ForOfStatement */:
+                    return checkRightHandSideOfForOf(parent.expression, parent.awaitModifier) || unknownType;
+                case 194 /* BinaryExpression */:
+                    return getAssignedTypeOfBinaryExpression(parent);
+                case 188 /* DeleteExpression */:
+                    return undefinedType;
+                case 177 /* ArrayLiteralExpression */:
+                    return getAssignedTypeOfArrayLiteralElement(parent, node);
+                case 198 /* SpreadElement */:
+                    return getAssignedTypeOfSpreadExpression(parent);
+                case 261 /* PropertyAssignment */:
+                    return getAssignedTypeOfPropertyAssignment(parent);
+                case 262 /* ShorthandPropertyAssignment */:
+                    return getAssignedTypeOfShorthandPropertyAssignment(parent);
             }
-            if (symbol.flags & 8 /* EnumMember */) {
-                return getDeclaredTypeOfEnumMember(symbol);
+            return unknownType;
+        }
+        function getInitialTypeOfBindingElement(node) {
+            var pattern = node.parent;
+            var parentType = getInitialType(pattern.parent);
+            var type = pattern.kind === 174 /* ObjectBindingPattern */ ?
+                getTypeOfDestructuredProperty(parentType, node.propertyName || node.name) :
+                !node.dotDotDotToken ?
+                    getTypeOfDestructuredArrayElement(parentType, ts.indexOf(pattern.elements, node)) :
+                    getTypeOfDestructuredSpreadExpression(parentType);
+            return getTypeWithDefault(type, node.initializer);
+        }
+        function getTypeOfInitializer(node) {
+            // Return the cached type if one is available. If the type of the variable was inferred
+            // from its initializer, we'll already have cached the type. Otherwise we compute it now
+            // without caching such that transient types are reflected.
+            var links = getNodeLinks(node);
+            return links.resolvedType || getTypeOfExpression(node);
+        }
+        function getInitialTypeOfVariableDeclaration(node) {
+            if (node.initializer) {
+                return getTypeOfInitializer(node.initializer);
             }
-            if (symbol.flags & 8388608 /* Alias */) {
-                return getDeclaredTypeOfAlias(symbol);
+            if (node.parent.parent.kind === 215 /* ForInStatement */) {
+                return stringType;
+            }
+            if (node.parent.parent.kind === 216 /* ForOfStatement */) {
+                return checkRightHandSideOfForOf(node.parent.parent.expression, node.parent.parent.awaitModifier) || unknownType;
             }
             return unknownType;
         }
-        // A type reference is considered independent if each type argument is considered independent.
-        function isIndependentTypeReference(node) {
-            if (node.typeArguments) {
-                for (var _i = 0, _a = node.typeArguments; _i < _a.length; _i++) {
-                    var typeNode = _a[_i];
-                    if (!isIndependentType(typeNode)) {
-                        return false;
-                    }
-                }
-            }
-            return true;
+        function getInitialType(node) {
+            return node.kind === 226 /* VariableDeclaration */ ?
+                getInitialTypeOfVariableDeclaration(node) :
+                getInitialTypeOfBindingElement(node);
         }
-        // A type is considered independent if it the any, string, number, boolean, symbol, or void keyword, a string
-        // literal type, an array with an element type that is considered independent, or a type reference that is
-        // considered independent.
-        function isIndependentType(node) {
+        function getInitialOrAssignedType(node) {
+            return node.kind === 226 /* VariableDeclaration */ || node.kind === 176 /* BindingElement */ ?
+                getInitialType(node) :
+                getAssignedType(node);
+        }
+        function isEmptyArrayAssignment(node) {
+            return node.kind === 226 /* VariableDeclaration */ && node.initializer &&
+                isEmptyArrayLiteral(node.initializer) ||
+                node.kind !== 176 /* BindingElement */ && node.parent.kind === 194 /* BinaryExpression */ &&
+                    isEmptyArrayLiteral(node.parent.right);
+        }
+        function getReferenceCandidate(node) {
             switch (node.kind) {
-                case 117 /* AnyKeyword */:
-                case 132 /* StringKeyword */:
-                case 130 /* NumberKeyword */:
-                case 120 /* BooleanKeyword */:
-                case 133 /* SymbolKeyword */:
-                case 103 /* VoidKeyword */:
-                case 135 /* UndefinedKeyword */:
-                case 93 /* NullKeyword */:
-                case 127 /* NeverKeyword */:
-                case 166 /* LiteralType */:
-                    return true;
-                case 160 /* ArrayType */:
-                    return isIndependentType(node.elementType);
-                case 155 /* TypeReference */:
-                    return isIndependentTypeReference(node);
+                case 185 /* ParenthesizedExpression */:
+                    return getReferenceCandidate(node.expression);
+                case 194 /* BinaryExpression */:
+                    switch (node.operatorToken.kind) {
+                        case 58 /* EqualsToken */:
+                            return getReferenceCandidate(node.left);
+                        case 26 /* CommaToken */:
+                            return getReferenceCandidate(node.right);
+                    }
             }
-            return false;
+            return node;
         }
-        // A variable-like declaration is considered independent (free of this references) if it has a type annotation
-        // that specifies an independent type, or if it has no type annotation and no initializer (and thus of type any).
-        function isIndependentVariableLikeDeclaration(node) {
-            return node.type && isIndependentType(node.type) || !node.type && !node.initializer;
+        function getReferenceRoot(node) {
+            var parent = node.parent;
+            return parent.kind === 185 /* ParenthesizedExpression */ ||
+                parent.kind === 194 /* BinaryExpression */ && parent.operatorToken.kind === 58 /* EqualsToken */ && parent.left === node ||
+                parent.kind === 194 /* BinaryExpression */ && parent.operatorToken.kind === 26 /* CommaToken */ && parent.right === node ?
+                getReferenceRoot(parent) : node;
         }
-        // A function-like declaration is considered independent (free of this references) if it has a return type
-        // annotation that is considered independent and if each parameter is considered independent.
-        function isIndependentFunctionLikeDeclaration(node) {
-            if (node.kind !== 148 /* Constructor */ && (!node.type || !isIndependentType(node.type))) {
-                return false;
-            }
-            for (var _i = 0, _a = node.parameters; _i < _a.length; _i++) {
-                var parameter = _a[_i];
-                if (!isIndependentVariableLikeDeclaration(parameter)) {
-                    return false;
-                }
+        function getTypeOfSwitchClause(clause) {
+            if (clause.kind === 257 /* CaseClause */) {
+                var caseType = getRegularTypeOfLiteralType(getTypeOfExpression(clause.expression));
+                return isUnitType(caseType) ? caseType : undefined;
             }
-            return true;
+            return neverType;
         }
-        // Returns true if the class or interface member given by the symbol is free of "this" references. The
-        // function may return false for symbols that are actually free of "this" references because it is not
-        // feasible to perform a complete analysis in all cases. In particular, property members with types
-        // inferred from their initializers and function members with inferred return types are conservatively
-        // assumed not to be free of "this" references.
-        function isIndependentMember(symbol) {
-            if (symbol.declarations && symbol.declarations.length === 1) {
-                var declaration = symbol.declarations[0];
-                if (declaration) {
-                    switch (declaration.kind) {
-                        case 145 /* PropertyDeclaration */:
-                        case 144 /* PropertySignature */:
-                            return isIndependentVariableLikeDeclaration(declaration);
-                        case 147 /* MethodDeclaration */:
-                        case 146 /* MethodSignature */:
-                        case 148 /* Constructor */:
-                            return isIndependentFunctionLikeDeclaration(declaration);
-                    }
-                }
+        function getSwitchClauseTypes(switchStatement) {
+            var links = getNodeLinks(switchStatement);
+            if (!links.switchTypes) {
+                // If all case clauses specify expressions that have unit types, we return an array
+                // of those unit types. Otherwise we return an empty array.
+                var types = ts.map(switchStatement.caseBlock.clauses, getTypeOfSwitchClause);
+                links.switchTypes = !ts.contains(types, undefined) ? types : emptyArray;
             }
-            return false;
+            return links.switchTypes;
         }
-        function createSymbolTable(symbols) {
-            var result = ts.createMap();
-            for (var _i = 0, symbols_1 = symbols; _i < symbols_1.length; _i++) {
-                var symbol = symbols_1[_i];
-                result[symbol.name] = symbol;
-            }
-            return result;
+        function eachTypeContainedIn(source, types) {
+            return source.flags & 65536 /* Union */ ? !ts.forEach(source.types, function (t) { return !ts.contains(types, t); }) : ts.contains(types, source);
         }
-        // The mappingThisOnly flag indicates that the only type parameter being mapped is "this". When the flag is true,
-        // we check symbols to see if we can quickly conclude they are free of "this" references, thus needing no instantiation.
-        function createInstantiatedSymbolTable(symbols, mapper, mappingThisOnly) {
-            var result = ts.createMap();
-            for (var _i = 0, symbols_2 = symbols; _i < symbols_2.length; _i++) {
-                var symbol = symbols_2[_i];
-                result[symbol.name] = mappingThisOnly && isIndependentMember(symbol) ? symbol : instantiateSymbol(symbol, mapper);
-            }
-            return result;
+        function isTypeSubsetOf(source, target) {
+            return source === target || target.flags & 65536 /* Union */ && isTypeSubsetOfUnion(source, target);
         }
-        function addInheritedMembers(symbols, baseSymbols) {
-            for (var _i = 0, baseSymbols_1 = baseSymbols; _i < baseSymbols_1.length; _i++) {
-                var s = baseSymbols_1[_i];
-                if (!symbols[s.name]) {
-                    symbols[s.name] = s;
+        function isTypeSubsetOfUnion(source, target) {
+            if (source.flags & 65536 /* Union */) {
+                for (var _i = 0, _a = source.types; _i < _a.length; _i++) {
+                    var t = _a[_i];
+                    if (!containsType(target.types, t)) {
+                        return false;
+                    }
                 }
+                return true;
             }
-        }
-        function resolveDeclaredMembers(type) {
-            if (!type.declaredProperties) {
-                var symbol = type.symbol;
-                type.declaredProperties = getNamedMembers(symbol.members);
-                type.declaredCallSignatures = getSignaturesOfSymbol(symbol.members["__call"]);
-                type.declaredConstructSignatures = getSignaturesOfSymbol(symbol.members["__new"]);
-                type.declaredStringIndexInfo = getIndexInfoOfSymbol(symbol, 0 /* String */);
-                type.declaredNumberIndexInfo = getIndexInfoOfSymbol(symbol, 1 /* Number */);
+            if (source.flags & 256 /* EnumLiteral */ && getBaseTypeOfEnumLiteralType(source) === target) {
+                return true;
             }
-            return type;
+            return containsType(target.types, source);
         }
-        function getTypeWithThisArgument(type, thisArgument) {
-            if (type.flags & 131072 /* Reference */) {
-                return createTypeReference(type.target, ts.concatenate(type.typeArguments, [thisArgument || type.target.thisType]));
-            }
-            return type;
+        function forEachType(type, f) {
+            return type.flags & 65536 /* Union */ ? ts.forEach(type.types, f) : f(type);
         }
-        function resolveObjectTypeMembers(type, source, typeParameters, typeArguments) {
-            var mapper;
-            var members;
-            var callSignatures;
-            var constructSignatures;
-            var stringIndexInfo;
-            var numberIndexInfo;
-            if (ts.rangeEquals(typeParameters, typeArguments, 0, typeParameters.length)) {
-                mapper = identityMapper;
-                members = source.symbol ? source.symbol.members : createSymbolTable(source.declaredProperties);
-                callSignatures = source.declaredCallSignatures;
-                constructSignatures = source.declaredConstructSignatures;
-                stringIndexInfo = source.declaredStringIndexInfo;
-                numberIndexInfo = source.declaredNumberIndexInfo;
+        function filterType(type, f) {
+            if (type.flags & 65536 /* Union */) {
+                var types = type.types;
+                var filtered = ts.filter(types, f);
+                return filtered === types ? type : getUnionTypeFromSortedList(filtered);
             }
-            else {
-                mapper = createTypeMapper(typeParameters, typeArguments);
-                members = createInstantiatedSymbolTable(source.declaredProperties, mapper, /*mappingThisOnly*/ typeParameters.length === 1);
-                callSignatures = instantiateList(source.declaredCallSignatures, mapper, instantiateSignature);
-                constructSignatures = instantiateList(source.declaredConstructSignatures, mapper, instantiateSignature);
-                stringIndexInfo = instantiateIndexInfo(source.declaredStringIndexInfo, mapper);
-                numberIndexInfo = instantiateIndexInfo(source.declaredNumberIndexInfo, mapper);
+            return f(type) ? type : neverType;
+        }
+        // Apply a mapping function to a type and return the resulting type. If the source type
+        // is a union type, the mapping function is applied to each constituent type and a union
+        // of the resulting types is returned.
+        function mapType(type, mapper) {
+            if (!(type.flags & 65536 /* Union */)) {
+                return mapper(type);
             }
-            var baseTypes = getBaseTypes(source);
-            if (baseTypes.length) {
-                if (source.symbol && members === source.symbol.members) {
-                    members = createSymbolTable(source.declaredProperties);
-                }
-                var thisArgument = ts.lastOrUndefined(typeArguments);
-                for (var _i = 0, baseTypes_1 = baseTypes; _i < baseTypes_1.length; _i++) {
-                    var baseType = baseTypes_1[_i];
-                    var instantiatedBaseType = thisArgument ? getTypeWithThisArgument(instantiateType(baseType, mapper), thisArgument) : baseType;
-                    addInheritedMembers(members, getPropertiesOfObjectType(instantiatedBaseType));
-                    callSignatures = ts.concatenate(callSignatures, getSignaturesOfType(instantiatedBaseType, 0 /* Call */));
-                    constructSignatures = ts.concatenate(constructSignatures, getSignaturesOfType(instantiatedBaseType, 1 /* Construct */));
-                    stringIndexInfo = stringIndexInfo || getIndexInfoOfType(instantiatedBaseType, 0 /* String */);
-                    numberIndexInfo = numberIndexInfo || getIndexInfoOfType(instantiatedBaseType, 1 /* Number */);
+            var types = type.types;
+            var mappedType;
+            var mappedTypes;
+            for (var _i = 0, types_13 = types; _i < types_13.length; _i++) {
+                var current = types_13[_i];
+                var t = mapper(current);
+                if (t) {
+                    if (!mappedType) {
+                        mappedType = t;
+                    }
+                    else if (!mappedTypes) {
+                        mappedTypes = [mappedType, t];
+                    }
+                    else {
+                        mappedTypes.push(t);
+                    }
                 }
             }
-            setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+            return mappedTypes ? getUnionType(mappedTypes) : mappedType;
         }
-        function resolveClassOrInterfaceMembers(type) {
-            resolveObjectTypeMembers(type, resolveDeclaredMembers(type), emptyArray, emptyArray);
+        function extractTypesOfKind(type, kind) {
+            return filterType(type, function (t) { return (t.flags & kind) !== 0; });
+        }
+        // Return a new type in which occurrences of the string and number primitive types in
+        // typeWithPrimitives have been replaced with occurrences of string literals and numeric
+        // literals in typeWithLiterals, respectively.
+        function replacePrimitivesWithLiterals(typeWithPrimitives, typeWithLiterals) {
+            if (isTypeSubsetOf(stringType, typeWithPrimitives) && maybeTypeOfKind(typeWithLiterals, 32 /* StringLiteral */) ||
+                isTypeSubsetOf(numberType, typeWithPrimitives) && maybeTypeOfKind(typeWithLiterals, 64 /* NumberLiteral */)) {
+                return mapType(typeWithPrimitives, function (t) {
+                    return t.flags & 2 /* String */ ? extractTypesOfKind(typeWithLiterals, 2 /* String */ | 32 /* StringLiteral */) :
+                        t.flags & 4 /* Number */ ? extractTypesOfKind(typeWithLiterals, 4 /* Number */ | 64 /* NumberLiteral */) :
+                            t;
+                });
+            }
+            return typeWithPrimitives;
         }
-        function resolveTypeReferenceMembers(type) {
-            var source = resolveDeclaredMembers(type.target);
-            var typeParameters = ts.concatenate(source.typeParameters, [source.thisType]);
-            var typeArguments = type.typeArguments && type.typeArguments.length === typeParameters.length ?
-                type.typeArguments : ts.concatenate(type.typeArguments, [type]);
-            resolveObjectTypeMembers(type, source, typeParameters, typeArguments);
+        function isIncomplete(flowType) {
+            return flowType.flags === 0;
         }
-        function createSignature(declaration, typeParameters, thisParameter, parameters, resolvedReturnType, typePredicate, minArgumentCount, hasRestParameter, hasLiteralTypes) {
-            var sig = new Signature(checker);
-            sig.declaration = declaration;
-            sig.typeParameters = typeParameters;
-            sig.parameters = parameters;
-            sig.thisParameter = thisParameter;
-            sig.resolvedReturnType = resolvedReturnType;
-            sig.typePredicate = typePredicate;
-            sig.minArgumentCount = minArgumentCount;
-            sig.hasRestParameter = hasRestParameter;
-            sig.hasLiteralTypes = hasLiteralTypes;
-            return sig;
+        function getTypeFromFlowType(flowType) {
+            return flowType.flags === 0 ? flowType.type : flowType;
         }
-        function cloneSignature(sig) {
-            return createSignature(sig.declaration, sig.typeParameters, sig.thisParameter, sig.parameters, sig.resolvedReturnType, sig.typePredicate, sig.minArgumentCount, sig.hasRestParameter, sig.hasLiteralTypes);
+        function createFlowType(type, incomplete) {
+            return incomplete ? { flags: 0, type: type } : type;
         }
-        function getDefaultConstructSignatures(classType) {
-            var baseConstructorType = getBaseConstructorTypeOfClass(classType);
-            var baseSignatures = getSignaturesOfType(baseConstructorType, 1 /* Construct */);
-            if (baseSignatures.length === 0) {
-                return [createSignature(undefined, classType.localTypeParameters, undefined, emptyArray, classType, /*typePredicate*/ undefined, 0, /*hasRestParameter*/ false, /*hasLiteralTypes*/ false)];
-            }
-            var baseTypeNode = getBaseTypeNodeOfClass(classType);
-            var typeArguments = ts.map(baseTypeNode.typeArguments, getTypeFromTypeNodeNoAlias);
-            var typeArgCount = typeArguments ? typeArguments.length : 0;
-            var result = [];
-            for (var _i = 0, baseSignatures_1 = baseSignatures; _i < baseSignatures_1.length; _i++) {
-                var baseSig = baseSignatures_1[_i];
-                var typeParamCount = baseSig.typeParameters ? baseSig.typeParameters.length : 0;
-                if (typeParamCount === typeArgCount) {
-                    var sig = typeParamCount ? getSignatureInstantiation(baseSig, typeArguments) : cloneSignature(baseSig);
-                    sig.typeParameters = classType.localTypeParameters;
-                    sig.resolvedReturnType = classType;
-                    result.push(sig);
-                }
-            }
+        // An evolving array type tracks the element types that have so far been seen in an
+        // 'x.push(value)' or 'x[n] = value' operation along the control flow graph. Evolving
+        // array types are ultimately converted into manifest array types (using getFinalArrayType)
+        // and never escape the getFlowTypeOfReference function.
+        function createEvolvingArrayType(elementType) {
+            var result = createObjectType(256 /* EvolvingArray */);
+            result.elementType = elementType;
             return result;
         }
-        function findMatchingSignature(signatureList, signature, partialMatch, ignoreThisTypes, ignoreReturnTypes) {
-            for (var _i = 0, signatureList_1 = signatureList; _i < signatureList_1.length; _i++) {
-                var s = signatureList_1[_i];
-                if (compareSignaturesIdentical(s, signature, partialMatch, ignoreThisTypes, ignoreReturnTypes, compareTypesIdentical)) {
-                    return s;
-                }
+        function getEvolvingArrayType(elementType) {
+            return evolvingArrayTypes[elementType.id] || (evolvingArrayTypes[elementType.id] = createEvolvingArrayType(elementType));
+        }
+        // When adding evolving array element types we do not perform subtype reduction. Instead,
+        // we defer subtype reduction until the evolving array type is finalized into a manifest
+        // array type.
+        function addEvolvingArrayElementType(evolvingArrayType, node) {
+            var elementType = getBaseTypeOfLiteralType(getContextFreeTypeOfExpression(node));
+            return isTypeSubsetOf(elementType, evolvingArrayType.elementType) ? evolvingArrayType : getEvolvingArrayType(getUnionType([evolvingArrayType.elementType, elementType]));
+        }
+        function createFinalArrayType(elementType) {
+            return elementType.flags & 8192 /* Never */ ?
+                autoArrayType :
+                createArrayType(elementType.flags & 65536 /* Union */ ?
+                    getUnionType(elementType.types, /*subtypeReduction*/ true) :
+                    elementType);
+        }
+        // We perform subtype reduction upon obtaining the final array type from an evolving array type.
+        function getFinalArrayType(evolvingArrayType) {
+            return evolvingArrayType.finalArrayType || (evolvingArrayType.finalArrayType = createFinalArrayType(evolvingArrayType.elementType));
+        }
+        function finalizeEvolvingArrayType(type) {
+            return getObjectFlags(type) & 256 /* EvolvingArray */ ? getFinalArrayType(type) : type;
+        }
+        function getElementTypeOfEvolvingArrayType(type) {
+            return getObjectFlags(type) & 256 /* EvolvingArray */ ? type.elementType : neverType;
+        }
+        function isEvolvingArrayTypeList(types) {
+            var hasEvolvingArrayType = false;
+            for (var _i = 0, types_14 = types; _i < types_14.length; _i++) {
+                var t = types_14[_i];
+                if (!(t.flags & 8192 /* Never */)) {
+                    if (!(getObjectFlags(t) & 256 /* EvolvingArray */)) {
+                        return false;
+                    }
+                    hasEvolvingArrayType = true;
+                }
+            }
+            return hasEvolvingArrayType;
+        }
+        // At flow control branch or loop junctions, if the type along every antecedent code path
+        // is an evolving array type, we construct a combined evolving array type. Otherwise we
+        // finalize all evolving array types.
+        function getUnionOrEvolvingArrayType(types, subtypeReduction) {
+            return isEvolvingArrayTypeList(types) ?
+                getEvolvingArrayType(getUnionType(ts.map(types, getElementTypeOfEvolvingArrayType))) :
+                getUnionType(ts.sameMap(types, finalizeEvolvingArrayType), subtypeReduction);
+        }
+        // Return true if the given node is 'x' in an 'x.length', x.push(value)', 'x.unshift(value)' or
+        // 'x[n] = value' operation, where 'n' is an expression of type any, undefined, or a number-like type.
+        function isEvolvingArrayOperationTarget(node) {
+            var root = getReferenceRoot(node);
+            var parent = root.parent;
+            var isLengthPushOrUnshift = parent.kind === 179 /* PropertyAccessExpression */ && (parent.name.text === "length" ||
+                parent.parent.kind === 181 /* CallExpression */ && ts.isPushOrUnshiftIdentifier(parent.name));
+            var isElementAssignment = parent.kind === 180 /* ElementAccessExpression */ &&
+                parent.expression === root &&
+                parent.parent.kind === 194 /* BinaryExpression */ &&
+                parent.parent.operatorToken.kind === 58 /* EqualsToken */ &&
+                parent.parent.left === parent &&
+                !ts.isAssignmentTarget(parent.parent) &&
+                isTypeAnyOrAllConstituentTypesHaveKind(getTypeOfExpression(parent.argumentExpression), 84 /* NumberLike */ | 2048 /* Undefined */);
+            return isLengthPushOrUnshift || isElementAssignment;
+        }
+        function maybeTypePredicateCall(node) {
+            var links = getNodeLinks(node);
+            if (links.maybeTypePredicate === undefined) {
+                links.maybeTypePredicate = getMaybeTypePredicate(node);
             }
+            return links.maybeTypePredicate;
         }
-        function findMatchingSignatures(signatureLists, signature, listIndex) {
-            if (signature.typeParameters) {
-                // We require an exact match for generic signatures, so we only return signatures from the first
-                // signature list and only if they have exact matches in the other signature lists.
-                if (listIndex > 0) {
-                    return undefined;
+        function getMaybeTypePredicate(node) {
+            if (node.expression.kind !== 97 /* SuperKeyword */) {
+                var funcType = checkNonNullExpression(node.expression);
+                if (funcType !== silentNeverType) {
+                    var apparentType = getApparentType(funcType);
+                    if (apparentType !== unknownType) {
+                        var callSignatures = getSignaturesOfType(apparentType, 0 /* Call */);
+                        return !!ts.forEach(callSignatures, function (sig) { return sig.typePredicate; });
+                    }
                 }
-                for (var i = 1; i < signatureLists.length; i++) {
-                    if (!findMatchingSignature(signatureLists[i], signature, /*partialMatch*/ false, /*ignoreThisTypes*/ false, /*ignoreReturnTypes*/ false)) {
-                        return undefined;
+            }
+            return false;
+        }
+        function getFlowTypeOfReference(reference, declaredType, initialType, flowContainer, couldBeUninitialized) {
+            if (initialType === void 0) { initialType = declaredType; }
+            var key;
+            if (!reference.flowNode || !couldBeUninitialized && !(declaredType.flags & 17810175 /* Narrowable */)) {
+                return declaredType;
+            }
+            var visitedFlowStart = visitedFlowCount;
+            var evolvedType = getTypeFromFlowType(getTypeAtFlowNode(reference.flowNode));
+            visitedFlowCount = visitedFlowStart;
+            // When the reference is 'x' in an 'x.length', 'x.push(value)', 'x.unshift(value)' or x[n] = value' operation,
+            // we give type 'any[]' to 'x' instead of using the type determined by control flow analysis such that operations
+            // on empty arrays are possible without implicit any errors and new element types can be inferred without
+            // type mismatch errors.
+            var resultType = getObjectFlags(evolvedType) & 256 /* EvolvingArray */ && isEvolvingArrayOperationTarget(reference) ? anyArrayType : finalizeEvolvingArrayType(evolvedType);
+            if (reference.parent.kind === 203 /* NonNullExpression */ && getTypeWithFacts(resultType, 524288 /* NEUndefinedOrNull */).flags & 8192 /* Never */) {
+                return declaredType;
+            }
+            return resultType;
+            function getTypeAtFlowNode(flow) {
+                while (true) {
+                    if (flow.flags & 1024 /* Shared */) {
+                        // We cache results of flow type resolution for shared nodes that were previously visited in
+                        // the same getFlowTypeOfReference invocation. A node is considered shared when it is the
+                        // antecedent of more than one node.
+                        for (var i = visitedFlowStart; i < visitedFlowCount; i++) {
+                            if (visitedFlowNodes[i] === flow) {
+                                return visitedFlowTypes[i];
+                            }
+                        }
+                    }
+                    var type = void 0;
+                    if (flow.flags & 4096 /* AfterFinally */) {
+                        // block flow edge: finally -> pre-try (for larger explanation check comment in binder.ts - bindTryStatement
+                        flow.locked = true;
+                        type = getTypeAtFlowNode(flow.antecedent);
+                        flow.locked = false;
+                    }
+                    else if (flow.flags & 2048 /* PreFinally */) {
+                        // locked pre-finally flows are filtered out in getTypeAtFlowBranchLabel
+                        // so here just redirect to antecedent
+                        flow = flow.antecedent;
+                        continue;
+                    }
+                    else if (flow.flags & 16 /* Assignment */) {
+                        type = getTypeAtFlowAssignment(flow);
+                        if (!type) {
+                            flow = flow.antecedent;
+                            continue;
+                        }
+                    }
+                    else if (flow.flags & 96 /* Condition */) {
+                        type = getTypeAtFlowCondition(flow);
+                    }
+                    else if (flow.flags & 128 /* SwitchClause */) {
+                        type = getTypeAtSwitchClause(flow);
+                    }
+                    else if (flow.flags & 12 /* Label */) {
+                        if (flow.antecedents.length === 1) {
+                            flow = flow.antecedents[0];
+                            continue;
+                        }
+                        type = flow.flags & 4 /* BranchLabel */ ?
+                            getTypeAtFlowBranchLabel(flow) :
+                            getTypeAtFlowLoopLabel(flow);
+                    }
+                    else if (flow.flags & 256 /* ArrayMutation */) {
+                        type = getTypeAtFlowArrayMutation(flow);
+                        if (!type) {
+                            flow = flow.antecedent;
+                            continue;
+                        }
+                    }
+                    else if (flow.flags & 2 /* Start */) {
+                        // Check if we should continue with the control flow of the containing function.
+                        var container = flow.container;
+                        if (container && container !== flowContainer && reference.kind !== 179 /* PropertyAccessExpression */ && reference.kind !== 99 /* ThisKeyword */) {
+                            flow = container.flowNode;
+                            continue;
+                        }
+                        // At the top of the flow we have the initial type.
+                        type = initialType;
+                    }
+                    else {
+                        // Unreachable code errors are reported in the binding phase. Here we
+                        // simply return the non-auto declared type to reduce follow-on errors.
+                        type = convertAutoToAny(declaredType);
+                    }
+                    if (flow.flags & 1024 /* Shared */) {
+                        // Record visited node and the associated type in the cache.
+                        visitedFlowNodes[visitedFlowCount] = flow;
+                        visitedFlowTypes[visitedFlowCount] = type;
+                        visitedFlowCount++;
                     }
+                    return type;
                 }
-                return [signature];
             }
-            var result = undefined;
-            for (var i = 0; i < signatureLists.length; i++) {
-                // Allow matching non-generic signatures to have excess parameters and different return types
-                var match = i === listIndex ? signature : findMatchingSignature(signatureLists[i], signature, /*partialMatch*/ true, /*ignoreThisTypes*/ true, /*ignoreReturnTypes*/ true);
-                if (!match) {
-                    return undefined;
+            function getTypeAtFlowAssignment(flow) {
+                var node = flow.node;
+                // Assignments only narrow the computed type if the declared type is a union type. Thus, we
+                // only need to evaluate the assigned type if the declared type is a union type.
+                if (isMatchingReference(reference, node)) {
+                    if (ts.getAssignmentTargetKind(node) === 2 /* Compound */) {
+                        var flowType = getTypeAtFlowNode(flow.antecedent);
+                        return createFlowType(getBaseTypeOfLiteralType(getTypeFromFlowType(flowType)), isIncomplete(flowType));
+                    }
+                    if (declaredType === autoType || declaredType === autoArrayType) {
+                        if (isEmptyArrayAssignment(node)) {
+                            return getEvolvingArrayType(neverType);
+                        }
+                        var assignedType = getBaseTypeOfLiteralType(getInitialOrAssignedType(node));
+                        return isTypeAssignableTo(assignedType, declaredType) ? assignedType : anyArrayType;
+                    }
+                    if (declaredType.flags & 65536 /* Union */) {
+                        return getAssignmentReducedType(declaredType, getInitialOrAssignedType(node));
+                    }
+                    return declaredType;
                 }
-                if (!ts.contains(result, match)) {
-                    (result || (result = [])).push(match);
+                // We didn't have a direct match. However, if the reference is a dotted name, this
+                // may be an assignment to a left hand part of the reference. For example, for a
+                // reference 'x.y.z', we may be at an assignment to 'x.y' or 'x'. In that case,
+                // return the declared type.
+                if (containsMatchingReference(reference, node)) {
+                    return declaredType;
                 }
+                // Assignment doesn't affect reference
+                return undefined;
             }
-            return result;
-        }
-        // The signatures of a union type are those signatures that are present in each of the constituent types.
-        // Generic signatures must match exactly, but non-generic signatures are allowed to have extra optional
-        // parameters and may differ in return types. When signatures differ in return types, the resulting return
-        // type is the union of the constituent return types.
-        function getUnionSignatures(types, kind) {
-            var signatureLists = ts.map(types, function (t) { return getSignaturesOfType(t, kind); });
-            var result = undefined;
-            for (var i = 0; i < signatureLists.length; i++) {
-                for (var _i = 0, _a = signatureLists[i]; _i < _a.length; _i++) {
-                    var signature = _a[_i];
-                    // Only process signatures with parameter lists that aren't already in the result list
-                    if (!result || !findMatchingSignature(result, signature, /*partialMatch*/ false, /*ignoreThisTypes*/ true, /*ignoreReturnTypes*/ true)) {
-                        var unionSignatures = findMatchingSignatures(signatureLists, signature, i);
-                        if (unionSignatures) {
-                            var s = signature;
-                            // Union the result types when more than one signature matches
-                            if (unionSignatures.length > 1) {
-                                s = cloneSignature(signature);
-                                if (ts.forEach(unionSignatures, function (sig) { return sig.thisParameter; })) {
-                                    var thisType = getUnionType(ts.map(unionSignatures, function (sig) { return getTypeOfSymbol(sig.thisParameter) || anyType; }), /*subtypeReduction*/ true);
-                                    s.thisParameter = createTransientSymbol(signature.thisParameter, thisType);
-                                }
-                                // Clear resolved return type we possibly got from cloneSignature
-                                s.resolvedReturnType = undefined;
-                                s.unionSignatures = unionSignatures;
+            function getTypeAtFlowArrayMutation(flow) {
+                var node = flow.node;
+                var expr = node.kind === 181 /* CallExpression */ ?
+                    node.expression.expression :
+                    node.left.expression;
+                if (isMatchingReference(reference, getReferenceCandidate(expr))) {
+                    var flowType = getTypeAtFlowNode(flow.antecedent);
+                    var type = getTypeFromFlowType(flowType);
+                    if (getObjectFlags(type) & 256 /* EvolvingArray */) {
+                        var evolvedType_1 = type;
+                        if (node.kind === 181 /* CallExpression */) {
+                            for (var _i = 0, _a = node.arguments; _i < _a.length; _i++) {
+                                var arg = _a[_i];
+                                evolvedType_1 = addEvolvingArrayElementType(evolvedType_1, arg);
                             }
-                            (result || (result = [])).push(s);
                         }
+                        else {
+                            var indexType = getTypeOfExpression(node.left.argumentExpression);
+                            if (isTypeAnyOrAllConstituentTypesHaveKind(indexType, 84 /* NumberLike */ | 2048 /* Undefined */)) {
+                                evolvedType_1 = addEvolvingArrayElementType(evolvedType_1, node.right);
+                            }
+                        }
+                        return evolvedType_1 === type ? flowType : createFlowType(evolvedType_1, isIncomplete(flowType));
                     }
+                    return flowType;
                 }
+                return undefined;
             }
-            return result || emptyArray;
-        }
-        function getUnionIndexInfo(types, kind) {
-            var indexTypes = [];
-            var isAnyReadonly = false;
-            for (var _i = 0, types_1 = types; _i < types_1.length; _i++) {
-                var type = types_1[_i];
-                var indexInfo = getIndexInfoOfType(type, kind);
-                if (!indexInfo) {
-                    return undefined;
+            function getTypeAtFlowCondition(flow) {
+                var flowType = getTypeAtFlowNode(flow.antecedent);
+                var type = getTypeFromFlowType(flowType);
+                if (type.flags & 8192 /* Never */) {
+                    return flowType;
+                }
+                // If we have an antecedent type (meaning we're reachable in some way), we first
+                // attempt to narrow the antecedent type. If that produces the never type, and if
+                // the antecedent type is incomplete (i.e. a transient type in a loop), then we
+                // take the type guard as an indication that control *could* reach here once we
+                // have the complete type. We proceed by switching to the silent never type which
+                // doesn't report errors when operators are applied to it. Note that this is the
+                // *only* place a silent never type is ever generated.
+                var assumeTrue = (flow.flags & 32 /* TrueCondition */) !== 0;
+                var nonEvolvingType = finalizeEvolvingArrayType(type);
+                var narrowedType = narrowType(nonEvolvingType, flow.expression, assumeTrue);
+                if (narrowedType === nonEvolvingType) {
+                    return flowType;
+                }
+                var incomplete = isIncomplete(flowType);
+                var resultType = incomplete && narrowedType.flags & 8192 /* Never */ ? silentNeverType : narrowedType;
+                return createFlowType(resultType, incomplete);
+            }
+            function getTypeAtSwitchClause(flow) {
+                var flowType = getTypeAtFlowNode(flow.antecedent);
+                var type = getTypeFromFlowType(flowType);
+                var expr = flow.switchStatement.expression;
+                if (isMatchingReference(reference, expr)) {
+                    type = narrowTypeBySwitchOnDiscriminant(type, flow.switchStatement, flow.clauseStart, flow.clauseEnd);
                 }
-                indexTypes.push(indexInfo.type);
-                isAnyReadonly = isAnyReadonly || indexInfo.isReadonly;
+                else if (isMatchingReferenceDiscriminant(expr)) {
+                    type = narrowTypeByDiscriminant(type, expr, function (t) { return narrowTypeBySwitchOnDiscriminant(t, flow.switchStatement, flow.clauseStart, flow.clauseEnd); });
+                }
+                return createFlowType(type, isIncomplete(flowType));
             }
-            return createIndexInfo(getUnionType(indexTypes, /*subtypeReduction*/ true), isAnyReadonly);
-        }
-        function resolveUnionTypeMembers(type) {
-            // The members and properties collections are empty for union types. To get all properties of a union
-            // type use getPropertiesOfType (only the language service uses this).
-            var callSignatures = getUnionSignatures(type.types, 0 /* Call */);
-            var constructSignatures = getUnionSignatures(type.types, 1 /* Construct */);
-            var stringIndexInfo = getUnionIndexInfo(type.types, 0 /* String */);
-            var numberIndexInfo = getUnionIndexInfo(type.types, 1 /* Number */);
-            setObjectTypeMembers(type, emptySymbols, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
-        }
-        function intersectTypes(type1, type2) {
-            return !type1 ? type2 : !type2 ? type1 : getIntersectionType([type1, type2]);
-        }
-        function intersectIndexInfos(info1, info2) {
-            return !info1 ? info2 : !info2 ? info1 : createIndexInfo(getIntersectionType([info1.type, info2.type]), info1.isReadonly && info2.isReadonly);
-        }
-        function resolveIntersectionTypeMembers(type) {
-            // The members and properties collections are empty for intersection types. To get all properties of an
-            // intersection type use getPropertiesOfType (only the language service uses this).
-            var callSignatures = emptyArray;
-            var constructSignatures = emptyArray;
-            var stringIndexInfo = undefined;
-            var numberIndexInfo = undefined;
-            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                var t = _a[_i];
-                callSignatures = ts.concatenate(callSignatures, getSignaturesOfType(t, 0 /* Call */));
-                constructSignatures = ts.concatenate(constructSignatures, getSignaturesOfType(t, 1 /* Construct */));
-                stringIndexInfo = intersectIndexInfos(stringIndexInfo, getIndexInfoOfType(t, 0 /* String */));
-                numberIndexInfo = intersectIndexInfos(numberIndexInfo, getIndexInfoOfType(t, 1 /* Number */));
+            function getTypeAtFlowBranchLabel(flow) {
+                var antecedentTypes = [];
+                var subtypeReduction = false;
+                var seenIncomplete = false;
+                for (var _i = 0, _a = flow.antecedents; _i < _a.length; _i++) {
+                    var antecedent = _a[_i];
+                    if (antecedent.flags & 2048 /* PreFinally */ && antecedent.lock.locked) {
+                        // if flow correspond to branch from pre-try to finally and this branch is locked - this means that
+                        // we initially have started following the flow outside the finally block.
+                        // in this case we should ignore this branch.
+                        continue;
+                    }
+                    var flowType = getTypeAtFlowNode(antecedent);
+                    var type = getTypeFromFlowType(flowType);
+                    // If the type at a particular antecedent path is the declared type and the
+                    // reference is known to always be assigned (i.e. when declared and initial types
+                    // are the same), there is no reason to process more antecedents since the only
+                    // possible outcome is subtypes that will be removed in the final union type anyway.
+                    if (type === declaredType && declaredType === initialType) {
+                        return type;
+                    }
+                    if (!ts.contains(antecedentTypes, type)) {
+                        antecedentTypes.push(type);
+                    }
+                    // If an antecedent type is not a subset of the declared type, we need to perform
+                    // subtype reduction. This happens when a "foreign" type is injected into the control
+                    // flow using the instanceof operator or a user defined type predicate.
+                    if (!isTypeSubsetOf(type, declaredType)) {
+                        subtypeReduction = true;
+                    }
+                    if (isIncomplete(flowType)) {
+                        seenIncomplete = true;
+                    }
+                }
+                return createFlowType(getUnionOrEvolvingArrayType(antecedentTypes, subtypeReduction), seenIncomplete);
             }
-            setObjectTypeMembers(type, emptySymbols, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
-        }
-        function resolveAnonymousTypeMembers(type) {
-            var symbol = type.symbol;
-            if (type.target) {
-                var members = createInstantiatedSymbolTable(getPropertiesOfObjectType(type.target), type.mapper, /*mappingThisOnly*/ false);
-                var callSignatures = instantiateList(getSignaturesOfType(type.target, 0 /* Call */), type.mapper, instantiateSignature);
-                var constructSignatures = instantiateList(getSignaturesOfType(type.target, 1 /* Construct */), type.mapper, instantiateSignature);
-                var stringIndexInfo = instantiateIndexInfo(getIndexInfoOfType(type.target, 0 /* String */), type.mapper);
-                var numberIndexInfo = instantiateIndexInfo(getIndexInfoOfType(type.target, 1 /* Number */), type.mapper);
-                setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+            function getTypeAtFlowLoopLabel(flow) {
+                // If we have previously computed the control flow type for the reference at
+                // this flow loop junction, return the cached type.
+                var id = getFlowNodeId(flow);
+                var cache = flowLoopCaches[id] || (flowLoopCaches[id] = ts.createMap());
+                if (!key) {
+                    key = getFlowCacheKey(reference);
+                }
+                var cached = cache.get(key);
+                if (cached) {
+                    return cached;
+                }
+                // If this flow loop junction and reference are already being processed, return
+                // the union of the types computed for each branch so far, marked as incomplete.
+                // It is possible to see an empty array in cases where loops are nested and the
+                // back edge of the outer loop reaches an inner loop that is already being analyzed.
+                // In such cases we restart the analysis of the inner loop, which will then see
+                // a non-empty in-process array for the outer loop and eventually terminate because
+                // the first antecedent of a loop junction is always the non-looping control flow
+                // path that leads to the top.
+                for (var i = flowLoopStart; i < flowLoopCount; i++) {
+                    if (flowLoopNodes[i] === flow && flowLoopKeys[i] === key && flowLoopTypes[i].length) {
+                        return createFlowType(getUnionOrEvolvingArrayType(flowLoopTypes[i], /*subtypeReduction*/ false), /*incomplete*/ true);
+                    }
+                }
+                // Add the flow loop junction and reference to the in-process stack and analyze
+                // each antecedent code path.
+                var antecedentTypes = [];
+                var subtypeReduction = false;
+                var firstAntecedentType;
+                flowLoopNodes[flowLoopCount] = flow;
+                flowLoopKeys[flowLoopCount] = key;
+                flowLoopTypes[flowLoopCount] = antecedentTypes;
+                for (var _i = 0, _a = flow.antecedents; _i < _a.length; _i++) {
+                    var antecedent = _a[_i];
+                    flowLoopCount++;
+                    var flowType = getTypeAtFlowNode(antecedent);
+                    flowLoopCount--;
+                    if (!firstAntecedentType) {
+                        firstAntecedentType = flowType;
+                    }
+                    var type = getTypeFromFlowType(flowType);
+                    // If we see a value appear in the cache it is a sign that control flow  analysis
+                    // was restarted and completed by checkExpressionCached. We can simply pick up
+                    // the resulting type and bail out.
+                    var cached_1 = cache.get(key);
+                    if (cached_1) {
+                        return cached_1;
+                    }
+                    if (!ts.contains(antecedentTypes, type)) {
+                        antecedentTypes.push(type);
+                    }
+                    // If an antecedent type is not a subset of the declared type, we need to perform
+                    // subtype reduction. This happens when a "foreign" type is injected into the control
+                    // flow using the instanceof operator or a user defined type predicate.
+                    if (!isTypeSubsetOf(type, declaredType)) {
+                        subtypeReduction = true;
+                    }
+                    // If the type at a particular antecedent path is the declared type there is no
+                    // reason to process more antecedents since the only possible outcome is subtypes
+                    // that will be removed in the final union type anyway.
+                    if (type === declaredType) {
+                        break;
+                    }
+                }
+                // The result is incomplete if the first antecedent (the non-looping control flow path)
+                // is incomplete.
+                var result = getUnionOrEvolvingArrayType(antecedentTypes, subtypeReduction);
+                if (isIncomplete(firstAntecedentType)) {
+                    return createFlowType(result, /*incomplete*/ true);
+                }
+                cache.set(key, result);
+                return result;
+            }
+            function isMatchingReferenceDiscriminant(expr) {
+                return expr.kind === 179 /* PropertyAccessExpression */ &&
+                    declaredType.flags & 65536 /* Union */ &&
+                    isMatchingReference(reference, expr.expression) &&
+                    isDiscriminantProperty(declaredType, expr.name.text);
             }
-            else if (symbol.flags & 2048 /* TypeLiteral */) {
-                var members = symbol.members;
-                var callSignatures = getSignaturesOfSymbol(members["__call"]);
-                var constructSignatures = getSignaturesOfSymbol(members["__new"]);
-                var stringIndexInfo = getIndexInfoOfSymbol(symbol, 0 /* String */);
-                var numberIndexInfo = getIndexInfoOfSymbol(symbol, 1 /* Number */);
-                setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+            function narrowTypeByDiscriminant(type, propAccess, narrowType) {
+                var propName = propAccess.name.text;
+                var propType = getTypeOfPropertyOfType(type, propName);
+                var narrowedPropType = propType && narrowType(propType);
+                return propType === narrowedPropType ? type : filterType(type, function (t) { return isTypeComparableTo(getTypeOfPropertyOfType(t, propName), narrowedPropType); });
             }
-            else {
-                // Combinations of function, class, enum and module
-                var members = emptySymbols;
-                var constructSignatures = emptyArray;
-                if (symbol.flags & 1952 /* HasExports */) {
-                    members = getExportsOfSymbol(symbol);
+            function narrowTypeByTruthiness(type, expr, assumeTrue) {
+                if (isMatchingReference(reference, expr)) {
+                    return getTypeWithFacts(type, assumeTrue ? 1048576 /* Truthy */ : 2097152 /* Falsy */);
                 }
-                if (symbol.flags & 32 /* Class */) {
-                    var classType = getDeclaredTypeOfClassOrInterface(symbol);
-                    constructSignatures = getSignaturesOfSymbol(symbol.members["__constructor"]);
-                    if (!constructSignatures.length) {
-                        constructSignatures = getDefaultConstructSignatures(classType);
-                    }
-                    var baseConstructorType = getBaseConstructorTypeOfClass(classType);
-                    if (baseConstructorType.flags & 2588672 /* ObjectType */) {
-                        members = createSymbolTable(getNamedMembers(members));
-                        addInheritedMembers(members, getPropertiesOfObjectType(baseConstructorType));
-                    }
+                if (isMatchingReferenceDiscriminant(expr)) {
+                    return narrowTypeByDiscriminant(type, expr, function (t) { return getTypeWithFacts(t, assumeTrue ? 1048576 /* Truthy */ : 2097152 /* Falsy */); });
                 }
-                var numberIndexInfo = symbol.flags & 384 /* Enum */ ? enumNumberIndexInfo : undefined;
-                setObjectTypeMembers(type, members, emptyArray, constructSignatures, undefined, numberIndexInfo);
-                // We resolve the members before computing the signatures because a signature may use
-                // typeof with a qualified name expression that circularly references the type we are
-                // in the process of resolving (see issue #6072). The temporarily empty signature list
-                // will never be observed because a qualified name can't reference signatures.
-                if (symbol.flags & (16 /* Function */ | 8192 /* Method */)) {
-                    type.callSignatures = getSignaturesOfSymbol(symbol);
+                if (containsMatchingReferenceDiscriminant(reference, expr)) {
+                    return declaredType;
                 }
+                return type;
             }
-        }
-        function resolveStructuredTypeMembers(type) {
-            if (!type.members) {
-                if (type.flags & 131072 /* Reference */) {
-                    resolveTypeReferenceMembers(type);
+            function narrowTypeByBinaryExpression(type, expr, assumeTrue) {
+                switch (expr.operatorToken.kind) {
+                    case 58 /* EqualsToken */:
+                        return narrowTypeByTruthiness(type, expr.left, assumeTrue);
+                    case 32 /* EqualsEqualsToken */:
+                    case 33 /* ExclamationEqualsToken */:
+                    case 34 /* EqualsEqualsEqualsToken */:
+                    case 35 /* ExclamationEqualsEqualsToken */:
+                        var operator_1 = expr.operatorToken.kind;
+                        var left_1 = getReferenceCandidate(expr.left);
+                        var right_1 = getReferenceCandidate(expr.right);
+                        if (left_1.kind === 189 /* TypeOfExpression */ && right_1.kind === 9 /* StringLiteral */) {
+                            return narrowTypeByTypeof(type, left_1, operator_1, right_1, assumeTrue);
+                        }
+                        if (right_1.kind === 189 /* TypeOfExpression */ && left_1.kind === 9 /* StringLiteral */) {
+                            return narrowTypeByTypeof(type, right_1, operator_1, left_1, assumeTrue);
+                        }
+                        if (isMatchingReference(reference, left_1)) {
+                            return narrowTypeByEquality(type, operator_1, right_1, assumeTrue);
+                        }
+                        if (isMatchingReference(reference, right_1)) {
+                            return narrowTypeByEquality(type, operator_1, left_1, assumeTrue);
+                        }
+                        if (isMatchingReferenceDiscriminant(left_1)) {
+                            return narrowTypeByDiscriminant(type, left_1, function (t) { return narrowTypeByEquality(t, operator_1, right_1, assumeTrue); });
+                        }
+                        if (isMatchingReferenceDiscriminant(right_1)) {
+                            return narrowTypeByDiscriminant(type, right_1, function (t) { return narrowTypeByEquality(t, operator_1, left_1, assumeTrue); });
+                        }
+                        if (containsMatchingReferenceDiscriminant(reference, left_1) || containsMatchingReferenceDiscriminant(reference, right_1)) {
+                            return declaredType;
+                        }
+                        break;
+                    case 93 /* InstanceOfKeyword */:
+                        return narrowTypeByInstanceof(type, expr, assumeTrue);
+                    case 26 /* CommaToken */:
+                        return narrowType(type, expr.right, assumeTrue);
                 }
-                else if (type.flags & (32768 /* Class */ | 65536 /* Interface */)) {
-                    resolveClassOrInterfaceMembers(type);
+                return type;
+            }
+            function narrowTypeByEquality(type, operator, value, assumeTrue) {
+                if (type.flags & 1 /* Any */) {
+                    return type;
                 }
-                else if (type.flags & 2097152 /* Anonymous */) {
-                    resolveAnonymousTypeMembers(type);
+                if (operator === 33 /* ExclamationEqualsToken */ || operator === 35 /* ExclamationEqualsEqualsToken */) {
+                    assumeTrue = !assumeTrue;
                 }
-                else if (type.flags & 524288 /* Union */) {
-                    resolveUnionTypeMembers(type);
+                var valueType = getTypeOfExpression(value);
+                if (valueType.flags & 6144 /* Nullable */) {
+                    if (!strictNullChecks) {
+                        return type;
+                    }
+                    var doubleEquals = operator === 32 /* EqualsEqualsToken */ || operator === 33 /* ExclamationEqualsToken */;
+                    var facts = doubleEquals ?
+                        assumeTrue ? 65536 /* EQUndefinedOrNull */ : 524288 /* NEUndefinedOrNull */ :
+                        value.kind === 95 /* NullKeyword */ ?
+                            assumeTrue ? 32768 /* EQNull */ : 262144 /* NENull */ :
+                            assumeTrue ? 16384 /* EQUndefined */ : 131072 /* NEUndefined */;
+                    return getTypeWithFacts(type, facts);
                 }
-                else if (type.flags & 1048576 /* Intersection */) {
-                    resolveIntersectionTypeMembers(type);
+                if (type.flags & 16810497 /* NotUnionOrUnit */) {
+                    return type;
                 }
-            }
-            return type;
-        }
-        /** Return properties of an object type or an empty array for other types */
-        function getPropertiesOfObjectType(type) {
-            if (type.flags & 2588672 /* ObjectType */) {
-                return resolveStructuredTypeMembers(type).properties;
-            }
-            return emptyArray;
-        }
-        /** If the given type is an object type and that type has a property by the given name,
-         * return the symbol for that property. Otherwise return undefined. */
-        function getPropertyOfObjectType(type, name) {
-            if (type.flags & 2588672 /* ObjectType */) {
-                var resolved = resolveStructuredTypeMembers(type);
-                var symbol = resolved.members[name];
-                if (symbol && symbolIsValue(symbol)) {
-                    return symbol;
+                if (assumeTrue) {
+                    var narrowedType = filterType(type, function (t) { return areTypesComparable(t, valueType); });
+                    return narrowedType.flags & 8192 /* Never */ ? type : replacePrimitivesWithLiterals(narrowedType, valueType);
                 }
-            }
-        }
-        function getPropertiesOfUnionOrIntersectionType(type) {
-            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                var current = _a[_i];
-                for (var _b = 0, _c = getPropertiesOfType(current); _b < _c.length; _b++) {
-                    var prop = _c[_b];
-                    getUnionOrIntersectionProperty(type, prop.name);
-                }
-                // The properties of a union type are those that are present in all constituent types, so
-                // we only need to check the properties of the first type
-                if (type.flags & 524288 /* Union */) {
-                    break;
+                if (isUnitType(valueType)) {
+                    var regularType_1 = getRegularTypeOfLiteralType(valueType);
+                    return filterType(type, function (t) { return getRegularTypeOfLiteralType(t) !== regularType_1; });
                 }
+                return type;
             }
-            var props = type.resolvedProperties;
-            if (props) {
-                var result = [];
-                for (var key in props) {
-                    var prop = props[key];
-                    // We need to filter out partial properties in union types
-                    if (!(prop.flags & 268435456 /* SyntheticProperty */ && prop.isPartial)) {
-                        result.push(prop);
+            function narrowTypeByTypeof(type, typeOfExpr, operator, literal, assumeTrue) {
+                // We have '==', '!=', '====', or !==' operator with 'typeof xxx' and string literal operands
+                var target = getReferenceCandidate(typeOfExpr.expression);
+                if (!isMatchingReference(reference, target)) {
+                    // For a reference of the form 'x.y', a 'typeof x === ...' type guard resets the
+                    // narrowed type of 'y' to its declared type.
+                    if (containsMatchingReference(reference, target)) {
+                        return declaredType;
                     }
+                    return type;
                 }
-                return result;
-            }
-            return emptyArray;
-        }
-        function getPropertiesOfType(type) {
-            type = getApparentType(type);
-            return type.flags & 1572864 /* UnionOrIntersection */ ? getPropertiesOfUnionOrIntersectionType(type) : getPropertiesOfObjectType(type);
-        }
-        /**
-         * The apparent type of a type parameter is the base constraint instantiated with the type parameter
-         * as the type argument for the 'this' type.
-         */
-        function getApparentTypeOfTypeParameter(type) {
-            if (!type.resolvedApparentType) {
-                var constraintType = getConstraintOfTypeParameter(type);
-                while (constraintType && constraintType.flags & 16384 /* TypeParameter */) {
-                    constraintType = getConstraintOfTypeParameter(constraintType);
+                if (operator === 33 /* ExclamationEqualsToken */ || operator === 35 /* ExclamationEqualsEqualsToken */) {
+                    assumeTrue = !assumeTrue;
                 }
-                type.resolvedApparentType = getTypeWithThisArgument(constraintType || emptyObjectType, type);
-            }
-            return type.resolvedApparentType;
-        }
-        /**
-         * For a type parameter, return the base constraint of the type parameter. For the string, number,
-         * boolean, and symbol primitive types, return the corresponding object types. Otherwise return the
-         * type itself. Note that the apparent type of a union type is the union type itself.
-         */
-        function getApparentType(type) {
-            if (type.flags & 16384 /* TypeParameter */) {
-                type = getApparentTypeOfTypeParameter(type);
-            }
-            if (type.flags & 34 /* StringLike */) {
-                type = globalStringType;
-            }
-            else if (type.flags & 340 /* NumberLike */) {
-                type = globalNumberType;
-            }
-            else if (type.flags & 136 /* BooleanLike */) {
-                type = globalBooleanType;
-            }
-            else if (type.flags & 512 /* ESSymbol */) {
-                type = getGlobalESSymbolType();
-            }
-            return type;
-        }
-        function createUnionOrIntersectionProperty(containingType, name) {
-            var types = containingType.types;
-            var props;
-            // Flags we want to propagate to the result if they exist in all source symbols
-            var commonFlags = (containingType.flags & 1048576 /* Intersection */) ? 536870912 /* Optional */ : 0 /* None */;
-            var isReadonly = false;
-            var isPartial = false;
-            for (var _i = 0, types_2 = types; _i < types_2.length; _i++) {
-                var current = types_2[_i];
-                var type = getApparentType(current);
-                if (type !== unknownType) {
-                    var prop = getPropertyOfType(type, name);
-                    if (prop && !(getDeclarationModifierFlagsFromSymbol(prop) & (8 /* Private */ | 16 /* Protected */))) {
-                        commonFlags &= prop.flags;
-                        if (!props) {
-                            props = [prop];
-                        }
-                        else if (!ts.contains(props, prop)) {
-                            props.push(prop);
-                        }
-                        if (isReadonlySymbol(prop)) {
-                            isReadonly = true;
+                if (assumeTrue && !(type.flags & 65536 /* Union */)) {
+                    // We narrow a non-union type to an exact primitive type if the non-union type
+                    // is a supertype of that primitive type. For example, type 'any' can be narrowed
+                    // to one of the primitive types.
+                    var targetType = typeofTypesByName.get(literal.text);
+                    if (targetType) {
+                        if (isTypeSubtypeOf(targetType, type)) {
+                            return targetType;
+                        }
+                        if (type.flags & 540672 /* TypeVariable */) {
+                            var constraint = getBaseConstraintOfType(type) || anyType;
+                            if (isTypeSubtypeOf(targetType, constraint)) {
+                                return getIntersectionType([type, targetType]);
+                            }
                         }
                     }
-                    else if (containingType.flags & 524288 /* Union */) {
-                        isPartial = true;
-                    }
                 }
+                var facts = assumeTrue ?
+                    typeofEQFacts.get(literal.text) || 64 /* TypeofEQHostObject */ :
+                    typeofNEFacts.get(literal.text) || 8192 /* TypeofNEHostObject */;
+                return getTypeWithFacts(type, facts);
             }
-            if (!props) {
-                return undefined;
-            }
-            if (props.length === 1 && !isPartial) {
-                return props[0];
+            function narrowTypeBySwitchOnDiscriminant(type, switchStatement, clauseStart, clauseEnd) {
+                // We only narrow if all case expressions specify values with unit types
+                var switchTypes = getSwitchClauseTypes(switchStatement);
+                if (!switchTypes.length) {
+                    return type;
+                }
+                var clauseTypes = switchTypes.slice(clauseStart, clauseEnd);
+                var hasDefaultClause = clauseStart === clauseEnd || ts.contains(clauseTypes, neverType);
+                var discriminantType = getUnionType(clauseTypes);
+                var caseType = discriminantType.flags & 8192 /* Never */ ? neverType :
+                    replacePrimitivesWithLiterals(filterType(type, function (t) { return isTypeComparableTo(discriminantType, t); }), discriminantType);
+                if (!hasDefaultClause) {
+                    return caseType;
+                }
+                var defaultType = filterType(type, function (t) { return !(isUnitType(t) && ts.contains(switchTypes, getRegularTypeOfLiteralType(t))); });
+                return caseType.flags & 8192 /* Never */ ? defaultType : getUnionType([caseType, defaultType]);
             }
-            var propTypes = [];
-            var declarations = [];
-            var commonType = undefined;
-            var hasNonUniformType = false;
-            for (var _a = 0, props_1 = props; _a < props_1.length; _a++) {
-                var prop = props_1[_a];
-                if (prop.declarations) {
-                    ts.addRange(declarations, prop.declarations);
+            function narrowTypeByInstanceof(type, expr, assumeTrue) {
+                var left = getReferenceCandidate(expr.left);
+                if (!isMatchingReference(reference, left)) {
+                    // For a reference of the form 'x.y', an 'x instanceof T' type guard resets the
+                    // narrowed type of 'y' to its declared type.
+                    if (containsMatchingReference(reference, left)) {
+                        return declaredType;
+                    }
+                    return type;
                 }
-                var type = getTypeOfSymbol(prop);
-                if (!commonType) {
-                    commonType = type;
+                // Check that right operand is a function type with a prototype property
+                var rightType = getTypeOfExpression(expr.right);
+                if (!isTypeSubtypeOf(rightType, globalFunctionType)) {
+                    return type;
                 }
-                else if (type !== commonType) {
-                    hasNonUniformType = true;
+                var targetType;
+                var prototypeProperty = getPropertyOfType(rightType, "prototype");
+                if (prototypeProperty) {
+                    // Target type is type of the prototype property
+                    var prototypePropertyType = getTypeOfSymbol(prototypeProperty);
+                    if (!isTypeAny(prototypePropertyType)) {
+                        targetType = prototypePropertyType;
+                    }
                 }
-                propTypes.push(type);
-            }
-            var result = createSymbol(4 /* Property */ | 67108864 /* Transient */ | 268435456 /* SyntheticProperty */ | commonFlags, name);
-            result.containingType = containingType;
-            result.hasNonUniformType = hasNonUniformType;
-            result.isPartial = isPartial;
-            result.declarations = declarations;
-            result.isReadonly = isReadonly;
-            result.type = containingType.flags & 524288 /* Union */ ? getUnionType(propTypes) : getIntersectionType(propTypes);
-            return result;
-        }
-        // Return the symbol for a given property in a union or intersection type, or undefined if the property
-        // does not exist in any constituent type. Note that the returned property may only be present in some
-        // constituents, in which case the isPartial flag is set when the containing type is union type. We need
-        // these partial properties when identifying discriminant properties, but otherwise they are filtered out
-        // and do not appear to be present in the union type.
-        function getUnionOrIntersectionProperty(type, name) {
-            var properties = type.resolvedProperties || (type.resolvedProperties = ts.createMap());
-            var property = properties[name];
-            if (!property) {
-                property = createUnionOrIntersectionProperty(type, name);
-                if (property) {
-                    properties[name] = property;
+                // Don't narrow from 'any' if the target type is exactly 'Object' or 'Function'
+                if (isTypeAny(type) && (targetType === globalObjectType || targetType === globalFunctionType)) {
+                    return type;
+                }
+                if (!targetType) {
+                    // Target type is type of construct signature
+                    var constructSignatures = void 0;
+                    if (getObjectFlags(rightType) & 2 /* Interface */) {
+                        constructSignatures = resolveDeclaredMembers(rightType).declaredConstructSignatures;
+                    }
+                    else if (getObjectFlags(rightType) & 16 /* Anonymous */) {
+                        constructSignatures = getSignaturesOfType(rightType, 1 /* Construct */);
+                    }
+                    if (constructSignatures && constructSignatures.length) {
+                        targetType = getUnionType(ts.map(constructSignatures, function (signature) { return getReturnTypeOfSignature(getErasedSignature(signature)); }));
+                    }
                 }
+                if (targetType) {
+                    return getNarrowedType(type, targetType, assumeTrue, isTypeInstanceOf);
+                }
+                return type;
             }
-            return property;
-        }
-        function getPropertyOfUnionOrIntersectionType(type, name) {
-            var property = getUnionOrIntersectionProperty(type, name);
-            // We need to filter out partial properties in union types
-            return property && !(property.flags & 268435456 /* SyntheticProperty */ && property.isPartial) ? property : undefined;
-        }
-        /**
-         * Return the symbol for the property with the given name in the given type. Creates synthetic union properties when
-         * necessary, maps primitive types and type parameters are to their apparent types, and augments with properties from
-         * Object and Function as appropriate.
-         *
-         * @param type a type to look up property from
-         * @param name a name of property to look up in a given type
-         */
-        function getPropertyOfType(type, name) {
-            type = getApparentType(type);
-            if (type.flags & 2588672 /* ObjectType */) {
-                var resolved = resolveStructuredTypeMembers(type);
-                var symbol = resolved.members[name];
-                if (symbol && symbolIsValue(symbol)) {
-                    return symbol;
+            function getNarrowedType(type, candidate, assumeTrue, isRelated) {
+                if (!assumeTrue) {
+                    return filterType(type, function (t) { return !isRelated(t, candidate); });
                 }
-                if (resolved === anyFunctionType || resolved.callSignatures.length || resolved.constructSignatures.length) {
-                    var symbol_1 = getPropertyOfObjectType(globalFunctionType, name);
-                    if (symbol_1) {
-                        return symbol_1;
+                // If the current type is a union type, remove all constituents that couldn't be instances of
+                // the candidate type. If one or more constituents remain, return a union of those.
+                if (type.flags & 65536 /* Union */) {
+                    var assignableType = filterType(type, function (t) { return isRelated(t, candidate); });
+                    if (!(assignableType.flags & 8192 /* Never */)) {
+                        return assignableType;
                     }
                 }
-                return getPropertyOfObjectType(globalObjectType, name);
-            }
-            if (type.flags & 1572864 /* UnionOrIntersection */) {
-                return getPropertyOfUnionOrIntersectionType(type, name);
-            }
-            return undefined;
-        }
-        function getSignaturesOfStructuredType(type, kind) {
-            if (type.flags & 4161536 /* StructuredType */) {
-                var resolved = resolveStructuredTypeMembers(type);
-                return kind === 0 /* Call */ ? resolved.callSignatures : resolved.constructSignatures;
-            }
-            return emptyArray;
-        }
-        /**
-         * Return the signatures of the given kind in the given type. Creates synthetic union signatures when necessary and
-         * maps primitive types and type parameters are to their apparent types.
-         */
-        function getSignaturesOfType(type, kind) {
-            return getSignaturesOfStructuredType(getApparentType(type), kind);
-        }
-        function getIndexInfoOfStructuredType(type, kind) {
-            if (type.flags & 4161536 /* StructuredType */) {
-                var resolved = resolveStructuredTypeMembers(type);
-                return kind === 0 /* String */ ? resolved.stringIndexInfo : resolved.numberIndexInfo;
+                // If the candidate type is a subtype of the target type, narrow to the candidate type.
+                // Otherwise, if the target type is assignable to the candidate type, keep the target type.
+                // Otherwise, if the candidate type is assignable to the target type, narrow to the candidate
+                // type. Otherwise, the types are completely unrelated, so narrow to an intersection of the
+                // two types.
+                return isTypeSubtypeOf(candidate, type) ? candidate :
+                    isTypeAssignableTo(type, candidate) ? type :
+                        isTypeAssignableTo(candidate, type) ? candidate :
+                            getIntersectionType([type, candidate]);
             }
-        }
-        function getIndexTypeOfStructuredType(type, kind) {
-            var info = getIndexInfoOfStructuredType(type, kind);
-            return info && info.type;
-        }
-        // Return the indexing info of the given kind in the given type. Creates synthetic union index types when necessary and
-        // maps primitive types and type parameters are to their apparent types.
-        function getIndexInfoOfType(type, kind) {
-            return getIndexInfoOfStructuredType(getApparentType(type), kind);
-        }
-        // Return the index type of the given kind in the given type. Creates synthetic union index types when necessary and
-        // maps primitive types and type parameters are to their apparent types.
-        function getIndexTypeOfType(type, kind) {
-            return getIndexTypeOfStructuredType(getApparentType(type), kind);
-        }
-        function getImplicitIndexTypeOfType(type, kind) {
-            if (isObjectLiteralType(type)) {
-                var propTypes = [];
-                for (var _i = 0, _a = getPropertiesOfType(type); _i < _a.length; _i++) {
-                    var prop = _a[_i];
-                    if (kind === 0 /* String */ || isNumericLiteralName(prop.name)) {
-                        propTypes.push(getTypeOfSymbol(prop));
+            function narrowTypeByTypePredicate(type, callExpression, assumeTrue) {
+                if (!hasMatchingArgument(callExpression, reference) || !maybeTypePredicateCall(callExpression)) {
+                    return type;
+                }
+                var signature = getResolvedSignature(callExpression);
+                var predicate = signature.typePredicate;
+                if (!predicate) {
+                    return type;
+                }
+                // Don't narrow from 'any' if the predicate type is exactly 'Object' or 'Function'
+                if (isTypeAny(type) && (predicate.type === globalObjectType || predicate.type === globalFunctionType)) {
+                    return type;
+                }
+                if (ts.isIdentifierTypePredicate(predicate)) {
+                    var predicateArgument = callExpression.arguments[predicate.parameterIndex - (signature.thisParameter ? 1 : 0)];
+                    if (predicateArgument) {
+                        if (isMatchingReference(reference, predicateArgument)) {
+                            return getNarrowedType(type, predicate.type, assumeTrue, isTypeSubtypeOf);
+                        }
+                        if (containsMatchingReference(reference, predicateArgument)) {
+                            return declaredType;
+                        }
                     }
                 }
-                if (propTypes.length) {
-                    return getUnionType(propTypes, /*subtypeReduction*/ true);
+                else {
+                    var invokedExpression = ts.skipParentheses(callExpression.expression);
+                    if (invokedExpression.kind === 180 /* ElementAccessExpression */ || invokedExpression.kind === 179 /* PropertyAccessExpression */) {
+                        var accessExpression = invokedExpression;
+                        var possibleReference = ts.skipParentheses(accessExpression.expression);
+                        if (isMatchingReference(reference, possibleReference)) {
+                            return getNarrowedType(type, predicate.type, assumeTrue, isTypeSubtypeOf);
+                        }
+                        if (containsMatchingReference(reference, possibleReference)) {
+                            return declaredType;
+                        }
+                    }
                 }
+                return type;
             }
-            return undefined;
-        }
-        function getTypeParametersFromJSDocTemplate(declaration) {
-            if (declaration.flags & 1048576 /* JavaScriptFile */) {
-                var templateTag = ts.getJSDocTemplateTag(declaration);
-                if (templateTag) {
-                    return getTypeParametersFromDeclaration(templateTag.typeParameters);
+            // Narrow the given type based on the given expression having the assumed boolean value. The returned type
+            // will be a subtype or the same type as the argument.
+            function narrowType(type, expr, assumeTrue) {
+                switch (expr.kind) {
+                    case 71 /* Identifier */:
+                    case 99 /* ThisKeyword */:
+                    case 97 /* SuperKeyword */:
+                    case 179 /* PropertyAccessExpression */:
+                        return narrowTypeByTruthiness(type, expr, assumeTrue);
+                    case 181 /* CallExpression */:
+                        return narrowTypeByTypePredicate(type, expr, assumeTrue);
+                    case 185 /* ParenthesizedExpression */:
+                        return narrowType(type, expr.expression, assumeTrue);
+                    case 194 /* BinaryExpression */:
+                        return narrowTypeByBinaryExpression(type, expr, assumeTrue);
+                    case 192 /* PrefixUnaryExpression */:
+                        if (expr.operator === 51 /* ExclamationToken */) {
+                            return narrowType(type, expr.operand, !assumeTrue);
+                        }
+                        break;
                 }
+                return type;
             }
-            return undefined;
         }
-        // Return list of type parameters with duplicates removed (duplicate identifier errors are generated in the actual
-        // type checking functions).
-        function getTypeParametersFromDeclaration(typeParameterDeclarations) {
-            var result = [];
-            ts.forEach(typeParameterDeclarations, function (node) {
-                var tp = getDeclaredTypeOfTypeParameter(node.symbol);
-                if (!ts.contains(result, tp)) {
-                    result.push(tp);
+        function getTypeOfSymbolAtLocation(symbol, location) {
+            // If we have an identifier or a property access at the given location, if the location is
+            // an dotted name expression, and if the location is not an assignment target, obtain the type
+            // of the expression (which will reflect control flow analysis). If the expression indeed
+            // resolved to the given symbol, return the narrowed type.
+            if (location.kind === 71 /* Identifier */) {
+                if (ts.isRightSideOfQualifiedNameOrPropertyAccess(location)) {
+                    location = location.parent;
+                }
+                if (ts.isPartOfExpression(location) && !ts.isAssignmentTarget(location)) {
+                    var type = getTypeOfExpression(location);
+                    if (getExportSymbolOfValueSymbolIfExported(getNodeLinks(location).resolvedSymbol) === symbol) {
+                        return type;
+                    }
                 }
+            }
+            // The location isn't a reference to the given symbol, meaning we're being asked
+            // a hypothetical question of what type the symbol would have if there was a reference
+            // to it at the given location. Since we have no control flow information for the
+            // hypothetical reference (control flow information is created and attached by the
+            // binder), we simply return the declared type of the symbol.
+            return getTypeOfSymbol(symbol);
+        }
+        function getControlFlowContainer(node) {
+            return ts.findAncestor(node.parent, function (node) {
+                return ts.isFunctionLike(node) && !ts.getImmediatelyInvokedFunctionExpression(node) ||
+                    node.kind === 234 /* ModuleBlock */ ||
+                    node.kind === 265 /* SourceFile */ ||
+                    node.kind === 149 /* PropertyDeclaration */;
             });
-            return result;
         }
-        function symbolsToArray(symbols) {
-            var result = [];
-            for (var id in symbols) {
-                if (!isReservedMemberName(id)) {
-                    result.push(symbols[id]);
+        // Check if a parameter is assigned anywhere within its declaring function.
+        function isParameterAssigned(symbol) {
+            var func = ts.getRootDeclaration(symbol.valueDeclaration).parent;
+            var links = getNodeLinks(func);
+            if (!(links.flags & 4194304 /* AssignmentsMarked */)) {
+                links.flags |= 4194304 /* AssignmentsMarked */;
+                if (!hasParentWithAssignmentsMarked(func)) {
+                    markParameterAssignments(func);
                 }
             }
-            return result;
+            return symbol.isAssigned || false;
         }
-        function isJSDocOptionalParameter(node) {
-            if (node.flags & 1048576 /* JavaScriptFile */) {
-                if (node.type && node.type.kind === 268 /* JSDocOptionalType */) {
-                    return true;
-                }
-                var paramTag = ts.getCorrespondingJSDocParameterTag(node);
-                if (paramTag) {
-                    if (paramTag.isBracketed) {
-                        return true;
-                    }
-                    if (paramTag.typeExpression) {
-                        return paramTag.typeExpression.type.kind === 268 /* JSDocOptionalType */;
+        function hasParentWithAssignmentsMarked(node) {
+            return !!ts.findAncestor(node.parent, function (node) { return ts.isFunctionLike(node) && !!(getNodeLinks(node).flags & 4194304 /* AssignmentsMarked */); });
+        }
+        function markParameterAssignments(node) {
+            if (node.kind === 71 /* Identifier */) {
+                if (ts.isAssignmentTarget(node)) {
+                    var symbol = getResolvedSymbol(node);
+                    if (symbol.valueDeclaration && ts.getRootDeclaration(symbol.valueDeclaration).kind === 146 /* Parameter */) {
+                        symbol.isAssigned = true;
                     }
                 }
             }
-        }
-        function isOptionalParameter(node) {
-            if (ts.hasQuestionToken(node) || isJSDocOptionalParameter(node)) {
-                return true;
-            }
-            if (node.initializer) {
-                var signatureDeclaration = node.parent;
-                var signature = getSignatureFromDeclaration(signatureDeclaration);
-                var parameterIndex = ts.indexOf(signatureDeclaration.parameters, node);
-                ts.Debug.assert(parameterIndex >= 0);
-                return parameterIndex >= signature.minArgumentCount;
+            else {
+                ts.forEachChild(node, markParameterAssignments);
             }
-            return false;
         }
-        function createTypePredicateFromTypePredicateNode(node) {
-            if (node.parameterName.kind === 69 /* Identifier */) {
-                var parameterName = node.parameterName;
-                return {
-                    kind: 1 /* Identifier */,
-                    parameterName: parameterName ? parameterName.text : undefined,
-                    parameterIndex: parameterName ? getTypePredicateParameterIndex(node.parent.parameters, parameterName) : undefined,
-                    type: getTypeFromTypeNode(node.type)
-                };
-            }
-            else {
-                return {
-                    kind: 0 /* This */,
-                    type: getTypeFromTypeNode(node.type)
-                };
+        function isConstVariable(symbol) {
+            return symbol.flags & 3 /* Variable */ && (getDeclarationNodeFlagsFromSymbol(symbol) & 2 /* Const */) !== 0 && getTypeOfSymbol(symbol) !== autoArrayType;
+        }
+        /** remove undefined from the annotated type of a parameter when there is an initializer (that doesn't include undefined) */
+        function removeOptionalityFromDeclaredType(declaredType, declaration) {
+            var annotationIncludesUndefined = strictNullChecks &&
+                declaration.kind === 146 /* Parameter */ &&
+                declaration.initializer &&
+                getFalsyFlags(declaredType) & 2048 /* Undefined */ &&
+                !(getFalsyFlags(checkExpression(declaration.initializer)) & 2048 /* Undefined */);
+            return annotationIncludesUndefined ? getTypeWithFacts(declaredType, 131072 /* NEUndefined */) : declaredType;
+        }
+        function isApparentTypePosition(node) {
+            var parent = node.parent;
+            return parent.kind === 179 /* PropertyAccessExpression */ ||
+                parent.kind === 181 /* CallExpression */ && parent.expression === node ||
+                parent.kind === 180 /* ElementAccessExpression */ && parent.expression === node;
+        }
+        function typeHasNullableConstraint(type) {
+            return type.flags & 540672 /* TypeVariable */ && maybeTypeOfKind(getBaseConstraintOfType(type) || emptyObjectType, 6144 /* Nullable */);
+        }
+        function getDeclaredOrApparentType(symbol, node) {
+            // When a node is the left hand expression of a property access, element access, or call expression,
+            // and the type of the node includes type variables with constraints that are nullable, we fetch the
+            // apparent type of the node *before* performing control flow analysis such that narrowings apply to
+            // the constraint type.
+            var type = getTypeOfSymbol(symbol);
+            if (isApparentTypePosition(node) && forEachType(type, typeHasNullableConstraint)) {
+                return mapType(getWidenedType(type), getApparentType);
             }
+            return type;
         }
-        function getSignatureFromDeclaration(declaration) {
-            var links = getNodeLinks(declaration);
-            if (!links.resolvedSignature) {
-                var parameters = [];
-                var hasLiteralTypes = false;
-                var minArgumentCount = -1;
-                var thisParameter = undefined;
-                var hasThisParameter = void 0;
-                var isJSConstructSignature = ts.isJSDocConstructSignature(declaration);
-                // If this is a JSDoc construct signature, then skip the first parameter in the
-                // parameter list.  The first parameter represents the return type of the construct
-                // signature.
-                for (var i = isJSConstructSignature ? 1 : 0, n = declaration.parameters.length; i < n; i++) {
-                    var param = declaration.parameters[i];
-                    var paramSymbol = param.symbol;
-                    // Include parameter symbol instead of property symbol in the signature
-                    if (paramSymbol && !!(paramSymbol.flags & 4 /* Property */) && !ts.isBindingPattern(param.name)) {
-                        var resolvedSymbol = resolveName(param, paramSymbol.name, 107455 /* Value */, undefined, undefined);
-                        paramSymbol = resolvedSymbol;
-                    }
-                    if (i === 0 && paramSymbol.name === "this") {
-                        hasThisParameter = true;
-                        thisParameter = param.symbol;
-                    }
-                    else {
-                        parameters.push(paramSymbol);
+        function checkIdentifier(node) {
+            var symbol = getResolvedSymbol(node);
+            if (symbol === unknownSymbol) {
+                return unknownType;
+            }
+            // As noted in ECMAScript 6 language spec, arrow functions never have an arguments objects.
+            // Although in down-level emit of arrow function, we emit it using function expression which means that
+            // arguments objects will be bound to the inner object; emitting arrow function natively in ES6, arguments objects
+            // will be bound to non-arrow function that contain this arrow function. This results in inconsistent behavior.
+            // To avoid that we will give an error to users if they use arguments objects in arrow function so that they
+            // can explicitly bound arguments objects
+            if (symbol === argumentsSymbol) {
+                var container = ts.getContainingFunction(node);
+                if (languageVersion < 2 /* ES2015 */) {
+                    if (container.kind === 187 /* ArrowFunction */) {
+                        error(node, ts.Diagnostics.The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_standard_function_expression);
                     }
-                    if (param.type && param.type.kind === 166 /* LiteralType */) {
-                        hasLiteralTypes = true;
+                    else if (ts.hasModifier(container, 256 /* Async */)) {
+                        error(node, ts.Diagnostics.The_arguments_object_cannot_be_referenced_in_an_async_function_or_method_in_ES3_and_ES5_Consider_using_a_standard_function_or_method);
                     }
-                    if (param.initializer || param.questionToken || param.dotDotDotToken || isJSDocOptionalParameter(param)) {
-                        if (minArgumentCount < 0) {
-                            minArgumentCount = i - (hasThisParameter ? 1 : 0);
+                }
+                getNodeLinks(container).flags |= 8192 /* CaptureArguments */;
+                return getTypeOfSymbol(symbol);
+            }
+            // We should only mark aliases as referenced if there isn't a local value declaration
+            // for the symbol.
+            if (isNonLocalAlias(symbol, /*excludes*/ 107455 /* Value */) && !isInTypeQuery(node) && !isConstEnumOrConstEnumOnlyModule(resolveAlias(symbol))) {
+                markAliasSymbolAsReferenced(symbol);
+            }
+            var localOrExportSymbol = getExportSymbolOfValueSymbolIfExported(symbol);
+            if (localOrExportSymbol.flags & 32 /* Class */) {
+                var declaration_1 = localOrExportSymbol.valueDeclaration;
+                // Due to the emit for class decorators, any reference to the class from inside of the class body
+                // must instead be rewritten to point to a temporary variable to avoid issues with the double-bind
+                // behavior of class names in ES6.
+                if (declaration_1.kind === 229 /* ClassDeclaration */
+                    && ts.nodeIsDecorated(declaration_1)) {
+                    var container = ts.getContainingClass(node);
+                    while (container !== undefined) {
+                        if (container === declaration_1 && container.name !== node) {
+                            getNodeLinks(declaration_1).flags |= 8388608 /* ClassWithConstructorReference */;
+                            getNodeLinks(node).flags |= 16777216 /* ConstructorReferenceInClass */;
+                            break;
                         }
-                    }
-                    else {
-                        // If we see any required parameters, it means the prior ones were not in fact optional.
-                        minArgumentCount = -1;
+                        container = ts.getContainingClass(container);
                     }
                 }
-                // If only one accessor includes a this-type annotation, the other behaves as if it had the same type annotation
-                if ((declaration.kind === 149 /* GetAccessor */ || declaration.kind === 150 /* SetAccessor */) &&
-                    !ts.hasDynamicName(declaration) &&
-                    (!hasThisParameter || !thisParameter)) {
-                    var otherKind = declaration.kind === 149 /* GetAccessor */ ? 150 /* SetAccessor */ : 149 /* GetAccessor */;
-                    var other = ts.getDeclarationOfKind(declaration.symbol, otherKind);
-                    if (other) {
-                        thisParameter = getAnnotatedAccessorThisParameter(other);
+                else if (declaration_1.kind === 199 /* ClassExpression */) {
+                    // When we emit a class expression with static members that contain a reference
+                    // to the constructor in the initializer, we will need to substitute that
+                    // binding with an alias as the class name is not in scope.
+                    var container = ts.getThisContainer(node, /*includeArrowFunctions*/ false);
+                    while (container !== undefined) {
+                        if (container.parent === declaration_1) {
+                            if (container.kind === 149 /* PropertyDeclaration */ && ts.hasModifier(container, 32 /* Static */)) {
+                                getNodeLinks(declaration_1).flags |= 8388608 /* ClassWithConstructorReference */;
+                                getNodeLinks(node).flags |= 16777216 /* ConstructorReferenceInClass */;
+                            }
+                            break;
+                        }
+                        container = ts.getThisContainer(container, /*includeArrowFunctions*/ false);
                     }
                 }
-                if (minArgumentCount < 0) {
-                    minArgumentCount = declaration.parameters.length - (hasThisParameter ? 1 : 0);
-                }
-                if (isJSConstructSignature) {
-                    minArgumentCount--;
+            }
+            checkCollisionWithCapturedSuperVariable(node, node);
+            checkCollisionWithCapturedThisVariable(node, node);
+            checkCollisionWithCapturedNewTargetVariable(node, node);
+            checkNestedBlockScopedBinding(node, symbol);
+            var type = getDeclaredOrApparentType(localOrExportSymbol, node);
+            var declaration = localOrExportSymbol.valueDeclaration;
+            var assignmentKind = ts.getAssignmentTargetKind(node);
+            if (assignmentKind) {
+                if (!(localOrExportSymbol.flags & 3 /* Variable */)) {
+                    error(node, ts.Diagnostics.Cannot_assign_to_0_because_it_is_not_a_variable, symbolToString(symbol));
+                    return unknownType;
                 }
-                if (!thisParameter && ts.isObjectLiteralMethod(declaration)) {
-                    thisParameter = getContextualThisParameter(declaration);
+                if (isReadonlySymbol(localOrExportSymbol)) {
+                    error(node, ts.Diagnostics.Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property, symbolToString(symbol));
+                    return unknownType;
                 }
-                var classType = declaration.kind === 148 /* Constructor */ ?
-                    getDeclaredTypeOfClassOrInterface(getMergedSymbol(declaration.parent.symbol))
-                    : undefined;
-                var typeParameters = classType ? classType.localTypeParameters :
-                    declaration.typeParameters ? getTypeParametersFromDeclaration(declaration.typeParameters) :
-                        getTypeParametersFromJSDocTemplate(declaration);
-                var returnType = getSignatureReturnTypeFromDeclaration(declaration, minArgumentCount, isJSConstructSignature, classType);
-                var typePredicate = declaration.type && declaration.type.kind === 154 /* TypePredicate */ ?
-                    createTypePredicateFromTypePredicateNode(declaration.type) :
-                    undefined;
-                links.resolvedSignature = createSignature(declaration, typeParameters, thisParameter, parameters, returnType, typePredicate, minArgumentCount, ts.hasRestParameter(declaration), hasLiteralTypes);
             }
-            return links.resolvedSignature;
-        }
-        function getSignatureReturnTypeFromDeclaration(declaration, minArgumentCount, isJSConstructSignature, classType) {
-            if (isJSConstructSignature) {
-                return getTypeFromTypeNode(declaration.parameters[0].type);
-            }
-            else if (classType) {
-                return classType;
+            // We only narrow variables and parameters occurring in a non-assignment position. For all other
+            // entities we simply return the declared type.
+            if (!(localOrExportSymbol.flags & 3 /* Variable */) || assignmentKind === 1 /* Definite */ || !declaration) {
+                return type;
             }
-            else if (declaration.type) {
-                return getTypeFromTypeNode(declaration.type);
+            // The declaration container is the innermost function that encloses the declaration of the variable
+            // or parameter. The flow container is the innermost function starting with which we analyze the control
+            // flow graph to determine the control flow based type.
+            var isParameter = ts.getRootDeclaration(declaration).kind === 146 /* Parameter */;
+            var declarationContainer = getControlFlowContainer(declaration);
+            var flowContainer = getControlFlowContainer(node);
+            var isOuterVariable = flowContainer !== declarationContainer;
+            // When the control flow originates in a function expression or arrow function and we are referencing
+            // a const variable or parameter from an outer function, we extend the origin of the control flow
+            // analysis to include the immediately enclosing function.
+            while (flowContainer !== declarationContainer && (flowContainer.kind === 186 /* FunctionExpression */ ||
+                flowContainer.kind === 187 /* ArrowFunction */ || ts.isObjectLiteralOrClassExpressionMethod(flowContainer)) &&
+                (isConstVariable(localOrExportSymbol) || isParameter && !isParameterAssigned(localOrExportSymbol))) {
+                flowContainer = getControlFlowContainer(flowContainer);
             }
-            if (declaration.flags & 1048576 /* JavaScriptFile */) {
-                var type = getReturnTypeFromJSDocComment(declaration);
-                if (type && type !== unknownType) {
-                    return type;
+            // We only look for uninitialized variables in strict null checking mode, and only when we can analyze
+            // the entire control flow graph from the variable's declaration (i.e. when the flow container and
+            // declaration container are the same).
+            var assumeInitialized = isParameter || isOuterVariable ||
+                type !== autoType && type !== autoArrayType && (!strictNullChecks || (type.flags & 1 /* Any */) !== 0 || isInTypeQuery(node) || node.parent.kind === 246 /* ExportSpecifier */) ||
+                node.parent.kind === 203 /* NonNullExpression */ ||
+                ts.isInAmbientContext(declaration);
+            var initialType = assumeInitialized ? (isParameter ? removeOptionalityFromDeclaredType(type, ts.getRootDeclaration(declaration)) : type) :
+                type === autoType || type === autoArrayType ? undefinedType :
+                    getNullableType(type, 2048 /* Undefined */);
+            var flowType = getFlowTypeOfReference(node, type, initialType, flowContainer, !assumeInitialized);
+            // A variable is considered uninitialized when it is possible to analyze the entire control flow graph
+            // from declaration to use, and when the variable's declared type doesn't include undefined but the
+            // control flow based type does include undefined.
+            if (type === autoType || type === autoArrayType) {
+                if (flowType === autoType || flowType === autoArrayType) {
+                    if (noImplicitAny) {
+                        error(ts.getNameOfDeclaration(declaration), ts.Diagnostics.Variable_0_implicitly_has_type_1_in_some_locations_where_its_type_cannot_be_determined, symbolToString(symbol), typeToString(flowType));
+                        error(node, ts.Diagnostics.Variable_0_implicitly_has_an_1_type, symbolToString(symbol), typeToString(flowType));
+                    }
+                    return convertAutoToAny(flowType);
                 }
             }
-            // TypeScript 1.0 spec (April 2014):
-            // If only one accessor includes a type annotation, the other behaves as if it had the same type annotation.
-            if (declaration.kind === 149 /* GetAccessor */ && !ts.hasDynamicName(declaration)) {
-                var setter = ts.getDeclarationOfKind(declaration.symbol, 150 /* SetAccessor */);
-                return getAnnotatedAccessorType(setter);
-            }
-            if (ts.nodeIsMissing(declaration.body)) {
-                return anyType;
-            }
-        }
-        function getSignaturesOfSymbol(symbol) {
-            if (!symbol)
-                return emptyArray;
-            var result = [];
-            for (var i = 0, len = symbol.declarations.length; i < len; i++) {
-                var node = symbol.declarations[i];
-                switch (node.kind) {
-                    case 156 /* FunctionType */:
-                    case 157 /* ConstructorType */:
-                    case 220 /* FunctionDeclaration */:
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                    case 148 /* Constructor */:
-                    case 151 /* CallSignature */:
-                    case 152 /* ConstructSignature */:
-                    case 153 /* IndexSignature */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                    case 179 /* FunctionExpression */:
-                    case 180 /* ArrowFunction */:
-                    case 269 /* JSDocFunctionType */:
-                        // Don't include signature if node is the implementation of an overloaded function. A node is considered
-                        // an implementation node if it has a body and the previous node is of the same kind and immediately
-                        // precedes the implementation node (i.e. has the same parent and ends where the implementation starts).
-                        if (i > 0 && node.body) {
-                            var previous = symbol.declarations[i - 1];
-                            if (node.parent === previous.parent && node.kind === previous.kind && node.pos === previous.end) {
-                                break;
-                            }
-                        }
-                        result.push(getSignatureFromDeclaration(node));
-                }
+            else if (!assumeInitialized && !(getFalsyFlags(type) & 2048 /* Undefined */) && getFalsyFlags(flowType) & 2048 /* Undefined */) {
+                error(node, ts.Diagnostics.Variable_0_is_used_before_being_assigned, symbolToString(symbol));
+                // Return the declared type to reduce follow-on errors
+                return type;
             }
-            return result;
+            return assignmentKind ? getBaseTypeOfLiteralType(flowType) : flowType;
         }
-        function resolveExternalModuleTypeByLiteral(name) {
-            var moduleSym = resolveExternalModuleName(name, name);
-            if (moduleSym) {
-                var resolvedModuleSymbol = resolveExternalModuleSymbol(moduleSym);
-                if (resolvedModuleSymbol) {
-                    return getTypeOfSymbol(resolvedModuleSymbol);
-                }
-            }
-            return anyType;
+        function isInsideFunction(node, threshold) {
+            return !!ts.findAncestor(node, function (n) { return n === threshold ? "quit" : ts.isFunctionLike(n); });
         }
-        function getThisTypeOfSignature(signature) {
-            if (signature.thisParameter) {
-                return getTypeOfSymbol(signature.thisParameter);
+        function checkNestedBlockScopedBinding(node, symbol) {
+            if (languageVersion >= 2 /* ES2015 */ ||
+                (symbol.flags & (2 /* BlockScopedVariable */ | 32 /* Class */)) === 0 ||
+                symbol.valueDeclaration.parent.kind === 260 /* CatchClause */) {
+                return;
             }
-        }
-        function getReturnTypeOfSignature(signature) {
-            if (!signature.resolvedReturnType) {
-                if (!pushTypeResolution(signature, 3 /* ResolvedReturnType */)) {
-                    return unknownType;
-                }
-                var type = void 0;
-                if (signature.target) {
-                    type = instantiateType(getReturnTypeOfSignature(signature.target), signature.mapper);
-                }
-                else if (signature.unionSignatures) {
-                    type = getUnionType(ts.map(signature.unionSignatures, getReturnTypeOfSignature), /*subtypeReduction*/ true);
+            // 1. walk from the use site up to the declaration and check
+            // if there is anything function like between declaration and use-site (is binding/class is captured in function).
+            // 2. walk from the declaration up to the boundary of lexical environment and check
+            // if there is an iteration statement in between declaration and boundary (is binding/class declared inside iteration statement)
+            var container = ts.getEnclosingBlockScopeContainer(symbol.valueDeclaration);
+            var usedInFunction = isInsideFunction(node.parent, container);
+            var current = container;
+            var containedInIterationStatement = false;
+            while (current && !ts.nodeStartsNewLexicalEnvironment(current)) {
+                if (ts.isIterationStatement(current, /*lookInLabeledStatements*/ false)) {
+                    containedInIterationStatement = true;
+                    break;
                 }
-                else {
-                    type = getReturnTypeFromBody(signature.declaration);
+                current = current.parent;
+            }
+            if (containedInIterationStatement) {
+                if (usedInFunction) {
+                    // mark iteration statement as containing block-scoped binding captured in some function
+                    getNodeLinks(current).flags |= 65536 /* LoopWithCapturedBlockScopedBinding */;
                 }
-                if (!popTypeResolution()) {
-                    type = anyType;
-                    if (compilerOptions.noImplicitAny) {
-                        var declaration = signature.declaration;
-                        if (declaration.name) {
-                            error(declaration.name, ts.Diagnostics._0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions, ts.declarationNameToString(declaration.name));
-                        }
-                        else {
-                            error(declaration, ts.Diagnostics.Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions);
-                        }
-                    }
+                // mark variables that are declared in loop initializer and reassigned inside the body of ForStatement.
+                // if body of ForStatement will be converted to function then we'll need a extra machinery to propagate reassigned values back.
+                if (container.kind === 214 /* ForStatement */ &&
+                    ts.getAncestor(symbol.valueDeclaration, 227 /* VariableDeclarationList */).parent === container &&
+                    isAssignedInBodyOfForStatement(node, container)) {
+                    getNodeLinks(symbol.valueDeclaration).flags |= 2097152 /* NeedsLoopOutParameter */;
                 }
-                signature.resolvedReturnType = type;
+                // set 'declared inside loop' bit on the block-scoped binding
+                getNodeLinks(symbol.valueDeclaration).flags |= 262144 /* BlockScopedBindingInLoop */;
             }
-            return signature.resolvedReturnType;
-        }
-        function getRestTypeOfSignature(signature) {
-            if (signature.hasRestParameter) {
-                var type = getTypeOfSymbol(ts.lastOrUndefined(signature.parameters));
-                if (type.flags & 131072 /* Reference */ && type.target === globalArrayType) {
-                    return type.typeArguments[0];
-                }
+            if (usedInFunction) {
+                getNodeLinks(symbol.valueDeclaration).flags |= 131072 /* CapturedBlockScopedBinding */;
             }
-            return anyType;
-        }
-        function getSignatureInstantiation(signature, typeArguments) {
-            return instantiateSignature(signature, createTypeMapper(signature.typeParameters, typeArguments), /*eraseTypeParameters*/ true);
         }
-        function getErasedSignature(signature) {
-            if (!signature.typeParameters)
-                return signature;
-            if (!signature.erasedSignatureCache) {
-                signature.erasedSignatureCache = instantiateSignature(signature, createTypeEraser(signature.typeParameters), /*eraseTypeParameters*/ true);
+        function isAssignedInBodyOfForStatement(node, container) {
+            // skip parenthesized nodes
+            var current = node;
+            while (current.parent.kind === 185 /* ParenthesizedExpression */) {
+                current = current.parent;
             }
-            return signature.erasedSignatureCache;
-        }
-        function getOrCreateTypeFromSignature(signature) {
-            // There are two ways to declare a construct signature, one is by declaring a class constructor
-            // using the constructor keyword, and the other is declaring a bare construct signature in an
-            // object type literal or interface (using the new keyword). Each way of declaring a constructor
-            // will result in a different declaration kind.
-            if (!signature.isolatedSignatureType) {
-                var isConstructor = signature.declaration.kind === 148 /* Constructor */ || signature.declaration.kind === 152 /* ConstructSignature */;
-                var type = createObjectType(2097152 /* Anonymous */);
-                type.members = emptySymbols;
-                type.properties = emptyArray;
-                type.callSignatures = !isConstructor ? [signature] : emptyArray;
-                type.constructSignatures = isConstructor ? [signature] : emptyArray;
-                signature.isolatedSignatureType = type;
+            // check if node is used as LHS in some assignment expression
+            var isAssigned = false;
+            if (ts.isAssignmentTarget(current)) {
+                isAssigned = true;
             }
-            return signature.isolatedSignatureType;
-        }
-        function getIndexSymbol(symbol) {
-            return symbol.members["__index"];
+            else if ((current.parent.kind === 192 /* PrefixUnaryExpression */ || current.parent.kind === 193 /* PostfixUnaryExpression */)) {
+                var expr = current.parent;
+                isAssigned = expr.operator === 43 /* PlusPlusToken */ || expr.operator === 44 /* MinusMinusToken */;
+            }
+            if (!isAssigned) {
+                return false;
+            }
+            // at this point we know that node is the target of assignment
+            // now check that modification happens inside the statement part of the ForStatement
+            return !!ts.findAncestor(current, function (n) { return n === container ? "quit" : n === container.statement; });
         }
-        function getIndexDeclarationOfSymbol(symbol, kind) {
-            var syntaxKind = kind === 1 /* Number */ ? 130 /* NumberKeyword */ : 132 /* StringKeyword */;
-            var indexSymbol = getIndexSymbol(symbol);
-            if (indexSymbol) {
-                for (var _i = 0, _a = indexSymbol.declarations; _i < _a.length; _i++) {
-                    var decl = _a[_i];
-                    var node = decl;
-                    if (node.parameters.length === 1) {
-                        var parameter = node.parameters[0];
-                        if (parameter && parameter.type && parameter.type.kind === syntaxKind) {
-                            return node;
-                        }
-                    }
-                }
+        function captureLexicalThis(node, container) {
+            getNodeLinks(node).flags |= 2 /* LexicalThis */;
+            if (container.kind === 149 /* PropertyDeclaration */ || container.kind === 152 /* Constructor */) {
+                var classNode = container.parent;
+                getNodeLinks(classNode).flags |= 4 /* CaptureThis */;
+            }
+            else {
+                getNodeLinks(container).flags |= 4 /* CaptureThis */;
             }
-            return undefined;
         }
-        function createIndexInfo(type, isReadonly, declaration) {
-            return { type: type, isReadonly: isReadonly, declaration: declaration };
+        function findFirstSuperCall(n) {
+            if (ts.isSuperCall(n)) {
+                return n;
+            }
+            else if (ts.isFunctionLike(n)) {
+                return undefined;
+            }
+            return ts.forEachChild(n, findFirstSuperCall);
         }
-        function getIndexInfoOfSymbol(symbol, kind) {
-            var declaration = getIndexDeclarationOfSymbol(symbol, kind);
-            if (declaration) {
-                return createIndexInfo(declaration.type ? getTypeFromTypeNode(declaration.type) : anyType, (ts.getModifierFlags(declaration) & 64 /* Readonly */) !== 0, declaration);
+        /**
+         * Return a cached result if super-statement is already found.
+         * Otherwise, find a super statement in a given constructor function and cache the result in the node-links of the constructor
+         *
+         * @param constructor constructor-function to look for super statement
+         */
+        function getSuperCallInConstructor(constructor) {
+            var links = getNodeLinks(constructor);
+            // Only trying to find super-call if we haven't yet tried to find one.  Once we try, we will record the result
+            if (links.hasSuperCall === undefined) {
+                links.superCall = findFirstSuperCall(constructor.body);
+                links.hasSuperCall = links.superCall ? true : false;
             }
-            return undefined;
+            return links.superCall;
         }
-        function getConstraintDeclaration(type) {
-            return ts.getDeclarationOfKind(type.symbol, 141 /* TypeParameter */).constraint;
+        /**
+         * Check if the given class-declaration extends null then return true.
+         * Otherwise, return false
+         * @param classDecl a class declaration to check if it extends null
+         */
+        function classDeclarationExtendsNull(classDecl) {
+            var classSymbol = getSymbolOfNode(classDecl);
+            var classInstanceType = getDeclaredTypeOfSymbol(classSymbol);
+            var baseConstructorType = getBaseConstructorTypeOfClass(classInstanceType);
+            return baseConstructorType === nullWideningType;
         }
-        function hasConstraintReferenceTo(type, target) {
-            var checked;
-            while (type && !(type.flags & 268435456 /* ThisType */) && type.flags & 16384 /* TypeParameter */ && !ts.contains(checked, type)) {
-                if (type === target) {
-                    return true;
+        function checkThisBeforeSuper(node, container, diagnosticMessage) {
+            var containingClassDecl = container.parent;
+            var baseTypeNode = ts.getClassExtendsHeritageClauseElement(containingClassDecl);
+            // If a containing class does not have extends clause or the class extends null
+            // skip checking whether super statement is called before "this" accessing.
+            if (baseTypeNode && !classDeclarationExtendsNull(containingClassDecl)) {
+                var superCall = getSuperCallInConstructor(container);
+                // We should give an error in the following cases:
+                //      - No super-call
+                //      - "this" is accessing before super-call.
+                //          i.e super(this)
+                //              this.x; super();
+                // We want to make sure that super-call is done before accessing "this" so that
+                // "this" is not accessed as a parameter of the super-call.
+                if (!superCall || superCall.end > node.pos) {
+                    // In ES6, super inside constructor of class-declaration has to precede "this" accessing
+                    error(node, diagnosticMessage);
                 }
-                (checked || (checked = [])).push(type);
-                var constraintDeclaration = getConstraintDeclaration(type);
-                type = constraintDeclaration && getTypeFromTypeNode(constraintDeclaration);
             }
-            return false;
         }
-        function getConstraintOfTypeParameter(typeParameter) {
-            if (!typeParameter.constraint) {
-                if (typeParameter.target) {
-                    var targetConstraint = getConstraintOfTypeParameter(typeParameter.target);
-                    typeParameter.constraint = targetConstraint ? instantiateType(targetConstraint, typeParameter.mapper) : noConstraintType;
-                }
-                else {
-                    var constraintDeclaration = getConstraintDeclaration(typeParameter);
-                    var constraint = getTypeFromTypeNode(constraintDeclaration);
-                    if (hasConstraintReferenceTo(constraint, typeParameter)) {
-                        error(constraintDeclaration, ts.Diagnostics.Type_parameter_0_has_a_circular_constraint, typeToString(typeParameter));
-                        constraint = unknownType;
-                    }
-                    typeParameter.constraint = constraint;
-                }
+        function checkThisExpression(node) {
+            // Stop at the first arrow function so that we can
+            // tell whether 'this' needs to be captured.
+            var container = ts.getThisContainer(node, /* includeArrowFunctions */ true);
+            var needToCaptureLexicalThis = false;
+            if (container.kind === 152 /* Constructor */) {
+                checkThisBeforeSuper(node, container, ts.Diagnostics.super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class);
             }
-            return typeParameter.constraint === noConstraintType ? undefined : typeParameter.constraint;
-        }
-        function getParentSymbolOfTypeParameter(typeParameter) {
-            return getSymbolOfNode(ts.getDeclarationOfKind(typeParameter.symbol, 141 /* TypeParameter */).parent);
-        }
-        function getTypeListId(types) {
-            var result = "";
-            if (types) {
-                var length_3 = types.length;
-                var i = 0;
-                while (i < length_3) {
-                    var startId = types[i].id;
-                    var count = 1;
-                    while (i + count < length_3 && types[i + count].id === startId + count) {
-                        count++;
+            // Now skip arrow functions to get the "real" owner of 'this'.
+            if (container.kind === 187 /* ArrowFunction */) {
+                container = ts.getThisContainer(container, /* includeArrowFunctions */ false);
+                // When targeting es6, arrow function lexically bind "this" so we do not need to do the work of binding "this" in emitted code
+                needToCaptureLexicalThis = (languageVersion < 2 /* ES2015 */);
+            }
+            switch (container.kind) {
+                case 233 /* ModuleDeclaration */:
+                    error(node, ts.Diagnostics.this_cannot_be_referenced_in_a_module_or_namespace_body);
+                    // do not return here so in case if lexical this is captured - it will be reflected in flags on NodeLinks
+                    break;
+                case 232 /* EnumDeclaration */:
+                    error(node, ts.Diagnostics.this_cannot_be_referenced_in_current_location);
+                    // do not return here so in case if lexical this is captured - it will be reflected in flags on NodeLinks
+                    break;
+                case 152 /* Constructor */:
+                    if (isInConstructorArgumentInitializer(node, container)) {
+                        error(node, ts.Diagnostics.this_cannot_be_referenced_in_constructor_arguments);
+                        // do not return here so in case if lexical this is captured - it will be reflected in flags on NodeLinks
                     }
-                    if (result.length) {
-                        result += ",";
+                    break;
+                case 149 /* PropertyDeclaration */:
+                case 148 /* PropertySignature */:
+                    if (ts.getModifierFlags(container) & 32 /* Static */) {
+                        error(node, ts.Diagnostics.this_cannot_be_referenced_in_a_static_property_initializer);
+                        // do not return here so in case if lexical this is captured - it will be reflected in flags on NodeLinks
                     }
-                    result += startId;
-                    if (count > 1) {
-                        result += ":" + count;
+                    break;
+                case 144 /* ComputedPropertyName */:
+                    error(node, ts.Diagnostics.this_cannot_be_referenced_in_a_computed_property_name);
+                    break;
+            }
+            if (needToCaptureLexicalThis) {
+                captureLexicalThis(node, container);
+            }
+            if (ts.isFunctionLike(container) &&
+                (!isInParameterInitializerBeforeContainingFunction(node) || ts.getThisParameter(container))) {
+                // Note: a parameter initializer should refer to class-this unless function-this is explicitly annotated.
+                // If this is a function in a JS file, it might be a class method. Check if it's the RHS
+                // of a x.prototype.y = function [name]() { .... }
+                if (container.kind === 186 /* FunctionExpression */ &&
+                    container.parent.kind === 194 /* BinaryExpression */ &&
+                    ts.getSpecialPropertyAssignmentKind(container.parent) === 3 /* PrototypeProperty */) {
+                    // Get the 'x' of 'x.prototype.y = f' (here, 'f' is 'container')
+                    var className = container.parent // x.prototype.y = f
+                        .left // x.prototype.y
+                        .expression // x.prototype
+                        .expression; // x
+                    var classSymbol = checkExpression(className).symbol;
+                    if (classSymbol && classSymbol.members && (classSymbol.flags & 16 /* Function */)) {
+                        return getInferredClassType(classSymbol);
                     }
-                    i += count;
                 }
-            }
-            return result;
-        }
-        // This function is used to propagate certain flags when creating new object type references and union types.
-        // It is only necessary to do so if a constituent type might be the undefined type, the null type, the type
-        // of an object literal or the anyFunctionType. This is because there are operations in the type checker
-        // that care about the presence of such types at arbitrary depth in a containing type.
-        function getPropagatingFlagsOfTypes(types, excludeKinds) {
-            var result = 0;
-            for (var _i = 0, types_3 = types; _i < types_3.length; _i++) {
-                var type = types_3[_i];
-                if (!(type.flags & excludeKinds)) {
-                    result |= type.flags;
+                var thisType = getThisTypeOfDeclaration(container) || getContextualThisParameterType(container);
+                if (thisType) {
+                    return thisType;
                 }
             }
-            return result & 234881024 /* PropagatingFlags */;
-        }
-        function createTypeReference(target, typeArguments) {
-            var id = getTypeListId(typeArguments);
-            var type = target.instantiations[id];
-            if (!type) {
-                var propagatedFlags = typeArguments ? getPropagatingFlagsOfTypes(typeArguments, /*excludeKinds*/ 0) : 0;
-                var flags = 131072 /* Reference */ | propagatedFlags;
-                type = target.instantiations[id] = createObjectType(flags, target.symbol);
-                type.target = target;
-                type.typeArguments = typeArguments;
+            if (ts.isClassLike(container.parent)) {
+                var symbol = getSymbolOfNode(container.parent);
+                var type = ts.hasModifier(container, 32 /* Static */) ? getTypeOfSymbol(symbol) : getDeclaredTypeOfSymbol(symbol).thisType;
+                return getFlowTypeOfReference(node, type);
             }
-            return type;
-        }
-        function cloneTypeReference(source) {
-            var type = createObjectType(source.flags, source.symbol);
-            type.target = source.target;
-            type.typeArguments = source.typeArguments;
-            return type;
-        }
-        function getTypeReferenceArity(type) {
-            return type.target.typeParameters ? type.target.typeParameters.length : 0;
-        }
-        // Get type from reference to class or interface
-        function getTypeFromClassOrInterfaceReference(node, symbol) {
-            var type = getDeclaredTypeOfSymbol(getMergedSymbol(symbol));
-            var typeParameters = type.localTypeParameters;
-            if (typeParameters) {
-                if (!node.typeArguments || node.typeArguments.length !== typeParameters.length) {
-                    error(node, ts.Diagnostics.Generic_type_0_requires_1_type_argument_s, typeToString(type, /*enclosingDeclaration*/ undefined, 1 /* WriteArrayAsGenericType */), typeParameters.length);
-                    return unknownType;
+            if (ts.isInJavaScriptFile(node)) {
+                var type = getTypeForThisExpressionFromJSDoc(container);
+                if (type && type !== unknownType) {
+                    return type;
                 }
-                // In a type reference, the outer type parameters of the referenced class or interface are automatically
-                // supplied as type arguments and the type reference only specifies arguments for the local type parameters
-                // of the class or interface.
-                return createTypeReference(type, ts.concatenate(type.outerTypeParameters, ts.map(node.typeArguments, getTypeFromTypeNodeNoAlias)));
             }
-            if (node.typeArguments) {
-                error(node, ts.Diagnostics.Type_0_is_not_generic, typeToString(type));
-                return unknownType;
+            if (noImplicitThis) {
+                // With noImplicitThis, functions may not reference 'this' if it has type 'any'
+                error(node, ts.Diagnostics.this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation);
             }
-            return type;
+            return anyType;
         }
-        // Get type from reference to type alias. When a type alias is generic, the declared type of the type alias may include
-        // references to the type parameters of the alias. We replace those with the actual type arguments by instantiating the
-        // declared type. Instantiations are cached using the type identities of the type arguments as the key.
-        function getTypeFromTypeAliasReference(node, symbol) {
-            var type = getDeclaredTypeOfSymbol(symbol);
-            var links = getSymbolLinks(symbol);
-            var typeParameters = links.typeParameters;
-            if (typeParameters) {
-                if (!node.typeArguments || node.typeArguments.length !== typeParameters.length) {
-                    error(node, ts.Diagnostics.Generic_type_0_requires_1_type_argument_s, symbolToString(symbol), typeParameters.length);
-                    return unknownType;
+        function getTypeForThisExpressionFromJSDoc(node) {
+            var jsdocType = ts.getJSDocType(node);
+            if (jsdocType && jsdocType.kind === 279 /* JSDocFunctionType */) {
+                var jsDocFunctionType = jsdocType;
+                if (jsDocFunctionType.parameters.length > 0 && jsDocFunctionType.parameters[0].type.kind === 282 /* JSDocThisType */) {
+                    return getTypeFromTypeNode(jsDocFunctionType.parameters[0].type);
                 }
-                var typeArguments = ts.map(node.typeArguments, getTypeFromTypeNodeNoAlias);
-                var id = getTypeListId(typeArguments);
-                return links.instantiations[id] || (links.instantiations[id] = instantiateType(type, createTypeMapper(typeParameters, typeArguments)));
-            }
-            if (node.typeArguments) {
-                error(node, ts.Diagnostics.Type_0_is_not_generic, symbolToString(symbol));
-                return unknownType;
             }
-            return type;
-        }
-        // Get type from reference to named type that cannot be generic (enum or type parameter)
-        function getTypeFromNonGenericTypeReference(node, symbol) {
-            if (node.typeArguments) {
-                error(node, ts.Diagnostics.Type_0_is_not_generic, symbolToString(symbol));
-                return unknownType;
-            }
-            return getDeclaredTypeOfSymbol(symbol);
         }
-        function getTypeReferenceName(node) {
-            switch (node.kind) {
-                case 155 /* TypeReference */:
-                    return node.typeName;
-                case 267 /* JSDocTypeReference */:
-                    return node.name;
-                case 194 /* ExpressionWithTypeArguments */:
-                    // We only support expressions that are simple qualified names. For other
-                    // expressions this produces undefined.
-                    var expr = node.expression;
-                    if (ts.isEntityNameExpression(expr)) {
-                        return expr;
-                    }
-            }
-            return undefined;
+        function isInConstructorArgumentInitializer(node, constructorDecl) {
+            return !!ts.findAncestor(node, function (n) { return n === constructorDecl ? "quit" : n.kind === 146 /* Parameter */; });
         }
-        function resolveTypeReferenceName(node, typeReferenceName) {
-            if (!typeReferenceName) {
-                return unknownSymbol;
+        function checkSuperExpression(node) {
+            var isCallExpression = node.parent.kind === 181 /* CallExpression */ && node.parent.expression === node;
+            var container = ts.getSuperContainer(node, /*stopOnFunctions*/ true);
+            var needToCaptureLexicalThis = false;
+            // adjust the container reference in case if super is used inside arrow functions with arbitrarily deep nesting
+            if (!isCallExpression) {
+                while (container && container.kind === 187 /* ArrowFunction */) {
+                    container = ts.getSuperContainer(container, /*stopOnFunctions*/ true);
+                    needToCaptureLexicalThis = languageVersion < 2 /* ES2015 */;
+                }
             }
-            return resolveEntityName(typeReferenceName, 793064 /* Type */) || unknownSymbol;
-        }
-        function getTypeReferenceType(node, symbol) {
-            if (symbol === unknownSymbol) {
+            var canUseSuperExpression = isLegalUsageOfSuperExpression(container);
+            var nodeCheckFlag = 0;
+            if (!canUseSuperExpression) {
+                // issue more specific error if super is used in computed property name
+                // class A { foo() { return "1" }}
+                // class B {
+                //     [super.foo()]() {}
+                // }
+                var current = ts.findAncestor(node, function (n) { return n === container ? "quit" : n.kind === 144 /* ComputedPropertyName */; });
+                if (current && current.kind === 144 /* ComputedPropertyName */) {
+                    error(node, ts.Diagnostics.super_cannot_be_referenced_in_a_computed_property_name);
+                }
+                else if (isCallExpression) {
+                    error(node, ts.Diagnostics.Super_calls_are_not_permitted_outside_constructors_or_in_nested_functions_inside_constructors);
+                }
+                else if (!container || !container.parent || !(ts.isClassLike(container.parent) || container.parent.kind === 178 /* ObjectLiteralExpression */)) {
+                    error(node, ts.Diagnostics.super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions);
+                }
+                else {
+                    error(node, ts.Diagnostics.super_property_access_is_permitted_only_in_a_constructor_member_function_or_member_accessor_of_a_derived_class);
+                }
                 return unknownType;
             }
-            if (symbol.flags & (32 /* Class */ | 64 /* Interface */)) {
-                return getTypeFromClassOrInterfaceReference(node, symbol);
+            if (!isCallExpression && container.kind === 152 /* Constructor */) {
+                checkThisBeforeSuper(node, container, ts.Diagnostics.super_must_be_called_before_accessing_a_property_of_super_in_the_constructor_of_a_derived_class);
             }
-            if (symbol.flags & 524288 /* TypeAlias */) {
-                return getTypeFromTypeAliasReference(node, symbol);
+            if ((ts.getModifierFlags(container) & 32 /* Static */) || isCallExpression) {
+                nodeCheckFlag = 512 /* SuperStatic */;
             }
-            if (symbol.flags & 107455 /* Value */ && node.kind === 267 /* JSDocTypeReference */) {
-                // A JSDocTypeReference may have resolved to a value (as opposed to a type). In
-                // that case, the type of this reference is just the type of the value we resolved
-                // to.
-                return getTypeOfSymbol(symbol);
+            else {
+                nodeCheckFlag = 256 /* SuperInstance */;
             }
-            return getTypeFromNonGenericTypeReference(node, symbol);
-        }
-        function getTypeFromTypeReference(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                var symbol = void 0;
-                var type = void 0;
-                if (node.kind === 267 /* JSDocTypeReference */) {
-                    var typeReferenceName = getTypeReferenceName(node);
-                    symbol = resolveTypeReferenceName(node, typeReferenceName);
-                    type = getTypeReferenceType(node, symbol);
+            getNodeLinks(node).flags |= nodeCheckFlag;
+            // Due to how we emit async functions, we need to specialize the emit for an async method that contains a `super` reference.
+            // This is due to the fact that we emit the body of an async function inside of a generator function. As generator
+            // functions cannot reference `super`, we emit a helper inside of the method body, but outside of the generator. This helper
+            // uses an arrow function, which is permitted to reference `super`.
+            //
+            // There are two primary ways we can access `super` from within an async method. The first is getting the value of a property
+            // or indexed access on super, either as part of a right-hand-side expression or call expression. The second is when setting the value
+            // of a property or indexed access, either as part of an assignment expression or destructuring assignment.
+            //
+            // The simplest case is reading a value, in which case we will emit something like the following:
+            //
+            //  // ts
+            //  ...
+            //  async asyncMethod() {
+            //    let x = await super.asyncMethod();
+            //    return x;
+            //  }
+            //  ...
+            //
+            //  // js
+            //  ...
+            //  asyncMethod() {
+            //      const _super = name => super[name];
+            //      return __awaiter(this, arguments, Promise, function *() {
+            //          let x = yield _super("asyncMethod").call(this);
+            //          return x;
+            //      });
+            //  }
+            //  ...
+            //
+            // The more complex case is when we wish to assign a value, especially as part of a destructuring assignment. As both cases
+            // are legal in ES6, but also likely less frequent, we emit the same more complex helper for both scenarios:
+            //
+            //  // ts
+            //  ...
+            //  async asyncMethod(ar: Promise<any[]>) {
+            //      [super.a, super.b] = await ar;
+            //  }
+            //  ...
+            //
+            //  // js
+            //  ...
+            //  asyncMethod(ar) {
+            //      const _super = (function (geti, seti) {
+            //          const cache = Object.create(null);
+            //          return name => cache[name] || (cache[name] = { get value() { return geti(name); }, set value(v) { seti(name, v); } });
+            //      })(name => super[name], (name, value) => super[name] = value);
+            //      return __awaiter(this, arguments, Promise, function *() {
+            //          [_super("a").value, _super("b").value] = yield ar;
+            //      });
+            //  }
+            //  ...
+            //
+            // This helper creates an object with a "value" property that wraps the `super` property or indexed access for both get and set.
+            // This is required for destructuring assignments, as a call expression cannot be used as the target of a destructuring assignment
+            // while a property access can.
+            if (container.kind === 151 /* MethodDeclaration */ && ts.getModifierFlags(container) & 256 /* Async */) {
+                if (ts.isSuperProperty(node.parent) && ts.isAssignmentTarget(node.parent)) {
+                    getNodeLinks(container).flags |= 4096 /* AsyncMethodWithSuperBinding */;
                 }
                 else {
-                    // We only support expressions that are simple qualified names. For other expressions this produces undefined.
-                    var typeNameOrExpression = node.kind === 155 /* TypeReference */
-                        ? node.typeName
-                        : ts.isEntityNameExpression(node.expression)
-                            ? node.expression
-                            : undefined;
-                    symbol = typeNameOrExpression && resolveEntityName(typeNameOrExpression, 793064 /* Type */) || unknownSymbol;
-                    type = symbol === unknownSymbol ? unknownType :
-                        symbol.flags & (32 /* Class */ | 64 /* Interface */) ? getTypeFromClassOrInterfaceReference(node, symbol) :
-                            symbol.flags & 524288 /* TypeAlias */ ? getTypeFromTypeAliasReference(node, symbol) :
-                                getTypeFromNonGenericTypeReference(node, symbol);
+                    getNodeLinks(container).flags |= 2048 /* AsyncMethodWithSuper */;
                 }
-                // Cache both the resolved symbol and the resolved type. The resolved symbol is needed in when we check the
-                // type reference in checkTypeReferenceOrExpressionWithTypeArguments.
-                links.resolvedSymbol = symbol;
-                links.resolvedType = type;
             }
-            return links.resolvedType;
-        }
-        function getTypeFromTypeQueryNode(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                // TypeScript 1.0 spec (April 2014): 3.6.3
-                // The expression is processed as an identifier expression (section 4.3)
-                // or property access expression(section 4.10),
-                // the widened type(section 3.9) of which becomes the result.
-                links.resolvedType = getWidenedType(checkExpression(node.exprName));
+            if (needToCaptureLexicalThis) {
+                // call expressions are allowed only in constructors so they should always capture correct 'this'
+                // super property access expressions can also appear in arrow functions -
+                // in this case they should also use correct lexical this
+                captureLexicalThis(node.parent, container);
             }
-            return links.resolvedType;
-        }
-        function getTypeOfGlobalSymbol(symbol, arity) {
-            function getTypeDeclaration(symbol) {
-                var declarations = symbol.declarations;
-                for (var _i = 0, declarations_3 = declarations; _i < declarations_3.length; _i++) {
-                    var declaration = declarations_3[_i];
-                    switch (declaration.kind) {
-                        case 221 /* ClassDeclaration */:
-                        case 222 /* InterfaceDeclaration */:
-                        case 224 /* EnumDeclaration */:
-                            return declaration;
-                    }
+            if (container.parent.kind === 178 /* ObjectLiteralExpression */) {
+                if (languageVersion < 2 /* ES2015 */) {
+                    error(node, ts.Diagnostics.super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_higher);
+                    return unknownType;
+                }
+                else {
+                    // for object literal assume that type of 'super' is 'any'
+                    return anyType;
                 }
             }
-            if (!symbol) {
-                return arity ? emptyGenericType : emptyObjectType;
+            // at this point the only legal case for parent is ClassLikeDeclaration
+            var classLikeDeclaration = container.parent;
+            var classType = getDeclaredTypeOfSymbol(getSymbolOfNode(classLikeDeclaration));
+            var baseClassType = classType && getBaseTypes(classType)[0];
+            if (!baseClassType) {
+                if (!ts.getClassExtendsHeritageClauseElement(classLikeDeclaration)) {
+                    error(node, ts.Diagnostics.super_can_only_be_referenced_in_a_derived_class);
+                }
+                return unknownType;
             }
-            var type = getDeclaredTypeOfSymbol(symbol);
-            if (!(type.flags & 2588672 /* ObjectType */)) {
-                error(getTypeDeclaration(symbol), ts.Diagnostics.Global_type_0_must_be_a_class_or_interface_type, symbol.name);
-                return arity ? emptyGenericType : emptyObjectType;
+            if (container.kind === 152 /* Constructor */ && isInConstructorArgumentInitializer(node, container)) {
+                // issue custom error message for super property access in constructor arguments (to be aligned with old compiler)
+                error(node, ts.Diagnostics.super_cannot_be_referenced_in_constructor_arguments);
+                return unknownType;
             }
-            if ((type.typeParameters ? type.typeParameters.length : 0) !== arity) {
-                error(getTypeDeclaration(symbol), ts.Diagnostics.Global_type_0_must_have_1_type_parameter_s, symbol.name, arity);
-                return arity ? emptyGenericType : emptyObjectType;
+            return nodeCheckFlag === 512 /* SuperStatic */
+                ? getBaseConstructorTypeOfClass(classType)
+                : getTypeWithThisArgument(baseClassType, classType.thisType);
+            function isLegalUsageOfSuperExpression(container) {
+                if (!container) {
+                    return false;
+                }
+                if (isCallExpression) {
+                    // TS 1.0 SPEC (April 2014): 4.8.1
+                    // Super calls are only permitted in constructors of derived classes
+                    return container.kind === 152 /* Constructor */;
+                }
+                else {
+                    // TS 1.0 SPEC (April 2014)
+                    // 'super' property access is allowed
+                    // - In a constructor, instance member function, instance member accessor, or instance member variable initializer where this references a derived class instance
+                    // - In a static member function or static member accessor
+                    // topmost container must be something that is directly nested in the class declaration\object literal expression
+                    if (ts.isClassLike(container.parent) || container.parent.kind === 178 /* ObjectLiteralExpression */) {
+                        if (ts.getModifierFlags(container) & 32 /* Static */) {
+                            return container.kind === 151 /* MethodDeclaration */ ||
+                                container.kind === 150 /* MethodSignature */ ||
+                                container.kind === 153 /* GetAccessor */ ||
+                                container.kind === 154 /* SetAccessor */;
+                        }
+                        else {
+                            return container.kind === 151 /* MethodDeclaration */ ||
+                                container.kind === 150 /* MethodSignature */ ||
+                                container.kind === 153 /* GetAccessor */ ||
+                                container.kind === 154 /* SetAccessor */ ||
+                                container.kind === 149 /* PropertyDeclaration */ ||
+                                container.kind === 148 /* PropertySignature */ ||
+                                container.kind === 152 /* Constructor */;
+                        }
+                    }
+                }
+                return false;
             }
-            return type;
-        }
-        function getGlobalValueSymbol(name) {
-            return getGlobalSymbol(name, 107455 /* Value */, ts.Diagnostics.Cannot_find_global_value_0);
-        }
-        function getGlobalTypeSymbol(name) {
-            return getGlobalSymbol(name, 793064 /* Type */, ts.Diagnostics.Cannot_find_global_type_0);
-        }
-        function getGlobalSymbol(name, meaning, diagnostic) {
-            return resolveName(undefined, name, meaning, diagnostic, name);
-        }
-        function getGlobalType(name, arity) {
-            if (arity === void 0) { arity = 0; }
-            return getTypeOfGlobalSymbol(getGlobalTypeSymbol(name), arity);
-        }
-        /**
-         * Returns a type that is inside a namespace at the global scope, e.g.
-         * getExportedTypeFromNamespace('JSX', 'Element') returns the JSX.Element type
-         */
-        function getExportedTypeFromNamespace(namespace, name) {
-            var namespaceSymbol = getGlobalSymbol(namespace, 1920 /* Namespace */, /*diagnosticMessage*/ undefined);
-            var typeSymbol = namespaceSymbol && getSymbol(namespaceSymbol.exports, name, 793064 /* Type */);
-            return typeSymbol && getDeclaredTypeOfSymbol(typeSymbol);
-        }
-        /**
-          * Creates a TypeReference for a generic `TypedPropertyDescriptor<T>`.
-          */
-        function createTypedPropertyDescriptorType(propertyType) {
-            var globalTypedPropertyDescriptorType = getGlobalTypedPropertyDescriptorType();
-            return globalTypedPropertyDescriptorType !== emptyGenericType
-                ? createTypeReference(globalTypedPropertyDescriptorType, [propertyType])
-                : emptyObjectType;
-        }
-        /**
-         * Instantiates a global type that is generic with some element type, and returns that instantiation.
-         */
-        function createTypeFromGenericGlobalType(genericGlobalType, typeArguments) {
-            return genericGlobalType !== emptyGenericType ? createTypeReference(genericGlobalType, typeArguments) : emptyObjectType;
         }
-        function createIterableType(elementType) {
-            return createTypeFromGenericGlobalType(getGlobalIterableType(), [elementType]);
+        function getContainingObjectLiteral(func) {
+            return (func.kind === 151 /* MethodDeclaration */ ||
+                func.kind === 153 /* GetAccessor */ ||
+                func.kind === 154 /* SetAccessor */) && func.parent.kind === 178 /* ObjectLiteralExpression */ ? func.parent :
+                func.kind === 186 /* FunctionExpression */ && func.parent.kind === 261 /* PropertyAssignment */ ? func.parent.parent :
+                    undefined;
         }
-        function createIterableIteratorType(elementType) {
-            return createTypeFromGenericGlobalType(getGlobalIterableIteratorType(), [elementType]);
+        function getThisTypeArgument(type) {
+            return getObjectFlags(type) & 4 /* Reference */ && type.target === globalThisType ? type.typeArguments[0] : undefined;
         }
-        function createArrayType(elementType) {
-            return createTypeFromGenericGlobalType(globalArrayType, [elementType]);
+        function getThisTypeFromContextualType(type) {
+            return mapType(type, function (t) {
+                return t.flags & 131072 /* Intersection */ ? ts.forEach(t.types, getThisTypeArgument) : getThisTypeArgument(t);
+            });
         }
-        function getTypeFromArrayTypeNode(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                links.resolvedType = createArrayType(getTypeFromTypeNode(node.elementType));
+        function getContextualThisParameterType(func) {
+            if (func.kind === 187 /* ArrowFunction */) {
+                return undefined;
             }
-            return links.resolvedType;
-        }
-        // We represent tuple types as type references to synthesized generic interface types created by
-        // this function. The types are of the form:
-        //
-        //   interface Tuple<T0, T1, T2, ...> extends Array<T0 | T1 | T2 | ...> { 0: T0, 1: T1, 2: T2, ... }
-        //
-        // Note that the generic type created by this function has no symbol associated with it. The same
-        // is true for each of the synthesized type parameters.
-        function createTupleTypeOfArity(arity) {
-            var typeParameters = [];
-            var properties = [];
-            for (var i = 0; i < arity; i++) {
-                var typeParameter = createType(16384 /* TypeParameter */);
-                typeParameters.push(typeParameter);
-                var property = createSymbol(4 /* Property */ | 67108864 /* Transient */, "" + i);
-                property.type = typeParameter;
-                properties.push(property);
+            if (isContextSensitiveFunctionOrObjectLiteralMethod(func)) {
+                var contextualSignature = getContextualSignature(func);
+                if (contextualSignature) {
+                    var thisParameter = contextualSignature.thisParameter;
+                    if (thisParameter) {
+                        return getTypeOfSymbol(thisParameter);
+                    }
+                }
+            }
+            if (noImplicitThis) {
+                var containingLiteral = getContainingObjectLiteral(func);
+                if (containingLiteral) {
+                    // We have an object literal method. Check if the containing object literal has a contextual type
+                    // that includes a ThisType<T>. If so, T is the contextual type for 'this'. We continue looking in
+                    // any directly enclosing object literals.
+                    var contextualType = getApparentTypeOfContextualType(containingLiteral);
+                    var literal = containingLiteral;
+                    var type = contextualType;
+                    while (type) {
+                        var thisType = getThisTypeFromContextualType(type);
+                        if (thisType) {
+                            return instantiateType(thisType, getContextualMapper(containingLiteral));
+                        }
+                        if (literal.parent.kind !== 261 /* PropertyAssignment */) {
+                            break;
+                        }
+                        literal = literal.parent.parent;
+                        type = getApparentTypeOfContextualType(literal);
+                    }
+                    // There was no contextual ThisType<T> for the containing object literal, so the contextual type
+                    // for 'this' is the non-null form of the contextual type for the containing object literal or
+                    // the type of the object literal itself.
+                    return contextualType ? getNonNullableType(contextualType) : checkExpressionCached(containingLiteral);
+                }
+                // In an assignment of the form 'obj.xxx = function(...)' or 'obj[xxx] = function(...)', the
+                // contextual type for 'this' is 'obj'.
+                if (func.parent.kind === 194 /* BinaryExpression */ && func.parent.operatorToken.kind === 58 /* EqualsToken */) {
+                    var target = func.parent.left;
+                    if (target.kind === 179 /* PropertyAccessExpression */ || target.kind === 180 /* ElementAccessExpression */) {
+                        return checkExpressionCached(target.expression);
+                    }
+                }
             }
-            var type = createObjectType(262144 /* Tuple */ | 131072 /* Reference */);
-            type.typeParameters = typeParameters;
-            type.outerTypeParameters = undefined;
-            type.localTypeParameters = typeParameters;
-            type.instantiations = ts.createMap();
-            type.instantiations[getTypeListId(type.typeParameters)] = type;
-            type.target = type;
-            type.typeArguments = type.typeParameters;
-            type.thisType = createType(16384 /* TypeParameter */ | 268435456 /* ThisType */);
-            type.thisType.constraint = type;
-            type.declaredProperties = properties;
-            type.declaredCallSignatures = emptyArray;
-            type.declaredConstructSignatures = emptyArray;
-            type.declaredStringIndexInfo = undefined;
-            type.declaredNumberIndexInfo = undefined;
-            return type;
-        }
-        function getTupleTypeOfArity(arity) {
-            return tupleTypes[arity] || (tupleTypes[arity] = createTupleTypeOfArity(arity));
-        }
-        function createTupleType(elementTypes) {
-            return createTypeReference(getTupleTypeOfArity(elementTypes.length), elementTypes);
+            return undefined;
         }
-        function getTypeFromTupleTypeNode(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                links.resolvedType = createTupleType(ts.map(node.elementTypes, getTypeFromTypeNodeNoAlias));
+        // Return contextual type of parameter or undefined if no contextual type is available
+        function getContextuallyTypedParameterType(parameter) {
+            var func = parameter.parent;
+            if (isContextSensitiveFunctionOrObjectLiteralMethod(func)) {
+                var iife = ts.getImmediatelyInvokedFunctionExpression(func);
+                if (iife && iife.arguments) {
+                    var indexOfParameter = ts.indexOf(func.parameters, parameter);
+                    if (parameter.dotDotDotToken) {
+                        var restTypes = [];
+                        for (var i = indexOfParameter; i < iife.arguments.length; i++) {
+                            restTypes.push(getWidenedLiteralType(checkExpression(iife.arguments[i])));
+                        }
+                        return restTypes.length ? createArrayType(getUnionType(restTypes)) : undefined;
+                    }
+                    var links = getNodeLinks(iife);
+                    var cached = links.resolvedSignature;
+                    links.resolvedSignature = anySignature;
+                    var type = indexOfParameter < iife.arguments.length ?
+                        getWidenedLiteralType(checkExpression(iife.arguments[indexOfParameter])) :
+                        parameter.initializer ? undefined : undefinedWideningType;
+                    links.resolvedSignature = cached;
+                    return type;
+                }
+                var contextualSignature = getContextualSignature(func);
+                if (contextualSignature) {
+                    var funcHasRestParameters = ts.hasRestParameter(func);
+                    var len = func.parameters.length - (funcHasRestParameters ? 1 : 0);
+                    var indexOfParameter = ts.indexOf(func.parameters, parameter);
+                    if (indexOfParameter < len) {
+                        return getTypeAtPosition(contextualSignature, indexOfParameter);
+                    }
+                    // If last parameter is contextually rest parameter get its type
+                    if (funcHasRestParameters &&
+                        indexOfParameter === (func.parameters.length - 1) &&
+                        isRestParameterIndex(contextualSignature, func.parameters.length - 1)) {
+                        return getTypeOfSymbol(ts.lastOrUndefined(contextualSignature.parameters));
+                    }
+                }
             }
-            return links.resolvedType;
+            return undefined;
         }
-        function binarySearchTypes(types, type) {
-            var low = 0;
-            var high = types.length - 1;
-            var typeId = type.id;
-            while (low <= high) {
-                var middle = low + ((high - low) >> 1);
-                var id = types[middle].id;
-                if (id === typeId) {
-                    return middle;
+        // In a variable, parameter or property declaration with a type annotation,
+        //   the contextual type of an initializer expression is the type of the variable, parameter or property.
+        // Otherwise, in a parameter declaration of a contextually typed function expression,
+        //   the contextual type of an initializer expression is the contextual type of the parameter.
+        // Otherwise, in a variable or parameter declaration with a binding pattern name,
+        //   the contextual type of an initializer expression is the type implied by the binding pattern.
+        // Otherwise, in a binding pattern inside a variable or parameter declaration,
+        //   the contextual type of an initializer expression is the type annotation of the containing declaration, if present.
+        function getContextualTypeForInitializerExpression(node) {
+            var declaration = node.parent;
+            if (node === declaration.initializer) {
+                var typeNode = ts.getEffectiveTypeAnnotationNode(declaration);
+                if (typeNode) {
+                    return getTypeFromTypeNode(typeNode);
                 }
-                else if (id > typeId) {
-                    high = middle - 1;
+                if (ts.isInJavaScriptFile(declaration)) {
+                    var jsDocType = getTypeForDeclarationFromJSDocComment(declaration);
+                    if (jsDocType) {
+                        return jsDocType;
+                    }
                 }
-                else {
-                    low = middle + 1;
+                if (declaration.kind === 146 /* Parameter */) {
+                    var type = getContextuallyTypedParameterType(declaration);
+                    if (type) {
+                        return type;
+                    }
                 }
-            }
-            return ~low;
-        }
-        function containsType(types, type) {
-            return binarySearchTypes(types, type) >= 0;
-        }
-        function addTypeToUnion(typeSet, type) {
-            var flags = type.flags;
-            if (flags & 524288 /* Union */) {
-                addTypesToUnion(typeSet, type.types);
-            }
-            else if (flags & 1 /* Any */) {
-                typeSet.containsAny = true;
-            }
-            else if (!strictNullChecks && flags & 6144 /* Nullable */) {
-                if (flags & 2048 /* Undefined */)
-                    typeSet.containsUndefined = true;
-                if (flags & 4096 /* Null */)
-                    typeSet.containsNull = true;
-                if (!(flags & 33554432 /* ContainsWideningType */))
-                    typeSet.containsNonWideningType = true;
-            }
-            else if (!(flags & 8192 /* Never */)) {
-                if (flags & 2 /* String */)
-                    typeSet.containsString = true;
-                if (flags & 4 /* Number */)
-                    typeSet.containsNumber = true;
-                if (flags & 96 /* StringOrNumberLiteral */)
-                    typeSet.containsStringOrNumberLiteral = true;
-                var len = typeSet.length;
-                var index = len && type.id > typeSet[len - 1].id ? ~len : binarySearchTypes(typeSet, type);
-                if (index < 0) {
-                    if (!(flags & 2097152 /* Anonymous */ && type.symbol && type.symbol.flags & (16 /* Function */ | 8192 /* Method */) && containsIdenticalType(typeSet, type))) {
-                        typeSet.splice(~index, 0, type);
+                if (ts.isBindingPattern(declaration.name)) {
+                    return getTypeFromBindingPattern(declaration.name, /*includePatternInType*/ true, /*reportErrors*/ false);
+                }
+                if (ts.isBindingPattern(declaration.parent)) {
+                    var parentDeclaration = declaration.parent.parent;
+                    var name_21 = declaration.propertyName || declaration.name;
+                    if (parentDeclaration.kind !== 176 /* BindingElement */) {
+                        var parentTypeNode = ts.getEffectiveTypeAnnotationNode(parentDeclaration);
+                        if (parentTypeNode && !ts.isBindingPattern(name_21)) {
+                            var text = ts.getTextOfPropertyName(name_21);
+                            if (text) {
+                                return getTypeOfPropertyOfType(getTypeFromTypeNode(parentTypeNode), text);
+                            }
+                        }
                     }
                 }
             }
+            return undefined;
         }
-        // Add the given types to the given type set. Order is preserved, duplicates are removed,
-        // and nested types of the given kind are flattened into the set.
-        function addTypesToUnion(typeSet, types) {
-            for (var _i = 0, types_4 = types; _i < types_4.length; _i++) {
-                var type = types_4[_i];
-                addTypeToUnion(typeSet, type);
+        function getContextualTypeForReturnExpression(node) {
+            var func = ts.getContainingFunction(node);
+            if (func) {
+                var functionFlags = ts.getFunctionFlags(func);
+                if (functionFlags & 1 /* Generator */) {
+                    return undefined;
+                }
+                var contextualReturnType = getContextualReturnType(func);
+                return functionFlags & 2 /* Async */
+                    ? contextualReturnType && getAwaitedTypeOfPromise(contextualReturnType) // Async function
+                    : contextualReturnType; // Regular function
             }
+            return undefined;
         }
-        function containsIdenticalType(types, type) {
-            for (var _i = 0, types_5 = types; _i < types_5.length; _i++) {
-                var t = types_5[_i];
-                if (isTypeIdenticalTo(t, type)) {
-                    return true;
+        function getContextualTypeForYieldOperand(node) {
+            var func = ts.getContainingFunction(node);
+            if (func) {
+                var functionFlags = ts.getFunctionFlags(func);
+                var contextualReturnType = getContextualReturnType(func);
+                if (contextualReturnType) {
+                    return node.asteriskToken
+                        ? contextualReturnType
+                        : getIteratedTypeOfGenerator(contextualReturnType, (functionFlags & 2 /* Async */) !== 0);
                 }
             }
-            return false;
+            return undefined;
         }
-        function isSubtypeOfAny(candidate, types) {
-            for (var i = 0, len = types.length; i < len; i++) {
-                if (candidate !== types[i] && isTypeSubtypeOf(candidate, types[i])) {
+        function isInParameterInitializerBeforeContainingFunction(node) {
+            while (node.parent && !ts.isFunctionLike(node.parent)) {
+                if (node.parent.kind === 146 /* Parameter */ && node.parent.initializer === node) {
                     return true;
                 }
+                node = node.parent;
             }
             return false;
         }
-        function removeSubtypes(types) {
-            var i = types.length;
-            while (i > 0) {
-                i--;
-                if (isSubtypeOfAny(types[i], types)) {
-                    ts.orderedRemoveItemAt(types, i);
-                }
+        function getContextualReturnType(functionDecl) {
+            // If the containing function has a return type annotation, is a constructor, or is a get accessor whose
+            // corresponding set accessor has a type annotation, return statements in the function are contextually typed
+            if (functionDecl.kind === 152 /* Constructor */ ||
+                ts.getEffectiveReturnTypeNode(functionDecl) ||
+                isGetAccessorWithAnnotatedSetAccessor(functionDecl)) {
+                return getReturnTypeOfSignature(getSignatureFromDeclaration(functionDecl));
             }
-        }
-        function removeRedundantLiteralTypes(types) {
-            var i = types.length;
-            while (i > 0) {
-                i--;
-                var t = types[i];
-                var remove = t.flags & 32 /* StringLiteral */ && types.containsString ||
-                    t.flags & 64 /* NumberLiteral */ && types.containsNumber ||
-                    t.flags & 96 /* StringOrNumberLiteral */ && t.flags & 16777216 /* FreshLiteral */ && containsType(types, t.regularType);
-                if (remove) {
-                    ts.orderedRemoveItemAt(types, i);
-                }
+            // Otherwise, if the containing function is contextually typed by a function type with exactly one call signature
+            // and that call signature is non-generic, return statements are contextually typed by the return type of the signature
+            var signature = getContextualSignatureForFunctionLikeDeclaration(functionDecl);
+            if (signature) {
+                return getReturnTypeOfSignature(signature);
             }
+            return undefined;
         }
-        // We sort and deduplicate the constituent types based on object identity. If the subtypeReduction
-        // flag is specified we also reduce the constituent type set to only include types that aren't subtypes
-        // of other types. Subtype reduction is expensive for large union types and is possible only when union
-        // types are known not to circularly reference themselves (as is the case with union types created by
-        // expression constructs such as array literals and the || and ?: operators). Named types can
-        // circularly reference themselves and therefore cannot be subtype reduced during their declaration.
-        // For example, "type Item = string | (() => Item" is a named type that circularly references itself.
-        function getUnionType(types, subtypeReduction, aliasSymbol, aliasTypeArguments) {
-            if (types.length === 0) {
-                return neverType;
-            }
-            if (types.length === 1) {
-                return types[0];
+        // In a typed function call, an argument or substitution expression is contextually typed by the type of the corresponding parameter.
+        function getContextualTypeForArgument(callTarget, arg) {
+            var args = getEffectiveCallArguments(callTarget);
+            var argIndex = ts.indexOf(args, arg);
+            if (argIndex >= 0) {
+                var signature = getResolvedOrAnySignature(callTarget);
+                return getTypeAtPosition(signature, argIndex);
             }
-            var typeSet = [];
-            addTypesToUnion(typeSet, types);
-            if (typeSet.containsAny) {
-                return anyType;
+            return undefined;
+        }
+        function getContextualTypeForSubstitutionExpression(template, substitutionExpression) {
+            if (template.parent.kind === 183 /* TaggedTemplateExpression */) {
+                return getContextualTypeForArgument(template.parent, substitutionExpression);
             }
-            if (subtypeReduction) {
-                removeSubtypes(typeSet);
+            return undefined;
+        }
+        function getContextualTypeForBinaryOperand(node) {
+            var binaryExpression = node.parent;
+            var operator = binaryExpression.operatorToken.kind;
+            if (ts.isAssignmentOperator(operator)) {
+                // Don't do this for special property assignments to avoid circularity
+                if (ts.getSpecialPropertyAssignmentKind(binaryExpression) !== 0 /* None */) {
+                    return undefined;
+                }
+                // In an assignment expression, the right operand is contextually typed by the type of the left operand.
+                if (node === binaryExpression.right) {
+                    return getTypeOfExpression(binaryExpression.left);
+                }
             }
-            else if (typeSet.containsStringOrNumberLiteral) {
-                removeRedundantLiteralTypes(typeSet);
+            else if (operator === 54 /* BarBarToken */) {
+                // When an || expression has a contextual type, the operands are contextually typed by that type. When an ||
+                // expression has no contextual type, the right operand is contextually typed by the type of the left operand.
+                var type = getContextualType(binaryExpression);
+                if (!type && node === binaryExpression.right) {
+                    type = getTypeOfExpression(binaryExpression.left);
+                }
+                return type;
             }
-            if (typeSet.length === 0) {
-                return typeSet.containsNull ? typeSet.containsNonWideningType ? nullType : nullWideningType :
-                    typeSet.containsUndefined ? typeSet.containsNonWideningType ? undefinedType : undefinedWideningType :
-                        neverType;
+            else if (operator === 53 /* AmpersandAmpersandToken */ || operator === 26 /* CommaToken */) {
+                if (node === binaryExpression.right) {
+                    return getContextualType(binaryExpression);
+                }
             }
-            return getUnionTypeFromSortedList(typeSet, aliasSymbol, aliasTypeArguments);
+            return undefined;
         }
-        // This function assumes the constituent type list is sorted and deduplicated.
-        function getUnionTypeFromSortedList(types, aliasSymbol, aliasTypeArguments) {
-            if (types.length === 0) {
-                return neverType;
-            }
-            if (types.length === 1) {
-                return types[0];
+        function getTypeOfPropertyOfContextualType(type, name) {
+            return mapType(type, function (t) {
+                var prop = t.flags & 229376 /* StructuredType */ ? getPropertyOfType(t, name) : undefined;
+                return prop ? getTypeOfSymbol(prop) : undefined;
+            });
+        }
+        function getIndexTypeOfContextualType(type, kind) {
+            return mapType(type, function (t) { return getIndexTypeOfStructuredType(t, kind); });
+        }
+        // Return true if the given contextual type is a tuple-like type
+        function contextualTypeIsTupleLikeType(type) {
+            return !!(type.flags & 65536 /* Union */ ? ts.forEach(type.types, isTupleLikeType) : isTupleLikeType(type));
+        }
+        // In an object literal contextually typed by a type T, the contextual type of a property assignment is the type of
+        // the matching property in T, if one exists. Otherwise, it is the type of the numeric index signature in T, if one
+        // exists. Otherwise, it is the type of the string index signature in T, if one exists.
+        function getContextualTypeForObjectLiteralMethod(node) {
+            ts.Debug.assert(ts.isObjectLiteralMethod(node));
+            if (isInsideWithStatementBody(node)) {
+                // We cannot answer semantic questions within a with block, do not proceed any further
+                return undefined;
             }
-            var id = getTypeListId(types);
-            var type = unionTypes[id];
-            if (!type) {
-                var propagatedFlags = getPropagatingFlagsOfTypes(types, /*excludeKinds*/ 6144 /* Nullable */);
-                type = unionTypes[id] = createObjectType(524288 /* Union */ | propagatedFlags);
-                type.types = types;
-                type.aliasSymbol = aliasSymbol;
-                type.aliasTypeArguments = aliasTypeArguments;
+            return getContextualTypeForObjectLiteralElement(node);
+        }
+        function getContextualTypeForObjectLiteralElement(element) {
+            var objectLiteral = element.parent;
+            var type = getApparentTypeOfContextualType(objectLiteral);
+            if (type) {
+                if (!ts.hasDynamicName(element)) {
+                    // For a (non-symbol) computed property, there is no reason to look up the name
+                    // in the type. It will just be "__computed", which does not appear in any
+                    // SymbolTable.
+                    var symbolName = getSymbolOfNode(element).name;
+                    var propertyType = getTypeOfPropertyOfContextualType(type, symbolName);
+                    if (propertyType) {
+                        return propertyType;
+                    }
+                }
+                return isNumericName(element.name) && getIndexTypeOfContextualType(type, 1 /* Number */) ||
+                    getIndexTypeOfContextualType(type, 0 /* String */);
             }
-            return type;
+            return undefined;
         }
-        function getTypeFromUnionTypeNode(node, aliasSymbol, aliasTypeArguments) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                links.resolvedType = getUnionType(ts.map(node.types, getTypeFromTypeNodeNoAlias), /*subtypeReduction*/ false, aliasSymbol, aliasTypeArguments);
+        // In an array literal contextually typed by a type T, the contextual type of an element expression at index N is
+        // the type of the property with the numeric name N in T, if one exists. Otherwise, if T has a numeric index signature,
+        // it is the type of the numeric index signature in T. Otherwise, in ES6 and higher, the contextual type is the iterated
+        // type of T.
+        function getContextualTypeForElementExpression(node) {
+            var arrayLiteral = node.parent;
+            var type = getApparentTypeOfContextualType(arrayLiteral);
+            if (type) {
+                var index = ts.indexOf(arrayLiteral.elements, node);
+                return getTypeOfPropertyOfContextualType(type, "" + index)
+                    || getIndexTypeOfContextualType(type, 1 /* Number */)
+                    || getIteratedTypeOrElementType(type, /*errorNode*/ undefined, /*allowStringInput*/ false, /*allowAsyncIterables*/ false, /*checkAssignability*/ false);
             }
-            return links.resolvedType;
+            return undefined;
         }
-        function addTypeToIntersection(typeSet, type) {
-            if (type.flags & 1048576 /* Intersection */) {
-                addTypesToIntersection(typeSet, type.types);
+        // In a contextually typed conditional expression, the true/false expressions are contextually typed by the same type.
+        function getContextualTypeForConditionalOperand(node) {
+            var conditional = node.parent;
+            return node === conditional.whenTrue || node === conditional.whenFalse ? getContextualType(conditional) : undefined;
+        }
+        function getContextualTypeForJsxExpression(node) {
+            // JSX expression can appear in two position : JSX Element's children or JSX attribute
+            var jsxAttributes = ts.isJsxAttributeLike(node.parent) ?
+                node.parent.parent :
+                node.parent.openingElement.attributes; // node.parent is JsxElement
+            // When we trying to resolve JsxOpeningLikeElement as a stateless function element, we will already give its attributes a contextual type
+            // which is a type of the parameter of the signature we are trying out.
+            // If there is no contextual type (e.g. we are trying to resolve stateful component), get attributes type from resolving element's tagName
+            var attributesType = getContextualType(jsxAttributes);
+            if (!attributesType || isTypeAny(attributesType)) {
+                return undefined;
             }
-            else if (type.flags & 1 /* Any */) {
-                typeSet.containsAny = true;
+            if (ts.isJsxAttribute(node.parent)) {
+                // JSX expression is in JSX attribute
+                return getTypeOfPropertyOfType(attributesType, node.parent.name.text);
             }
-            else if (!(type.flags & 8192 /* Never */) && (strictNullChecks || !(type.flags & 6144 /* Nullable */)) && !ts.contains(typeSet, type)) {
-                typeSet.push(type);
+            else if (node.parent.kind === 249 /* JsxElement */) {
+                // JSX expression is in children of JSX Element, we will look for an "children" atttribute (we get the name from JSX.ElementAttributesProperty)
+                var jsxChildrenPropertyName = getJsxElementChildrenPropertyname();
+                return jsxChildrenPropertyName && jsxChildrenPropertyName !== "" ? getTypeOfPropertyOfType(attributesType, jsxChildrenPropertyName) : anyType;
             }
-        }
-        // Add the given types to the given type set. Order is preserved, duplicates are removed,
-        // and nested types of the given kind are flattened into the set.
-        function addTypesToIntersection(typeSet, types) {
-            for (var _i = 0, types_6 = types; _i < types_6.length; _i++) {
-                var type = types_6[_i];
-                addTypeToIntersection(typeSet, type);
+            else {
+                // JSX expression is in JSX spread attribute
+                return attributesType;
             }
         }
-        // We do not perform structural deduplication on intersection types. Intersection types are created only by the &
-        // type operator and we can't reduce those because we want to support recursive intersection types. For example,
-        // a type alias of the form "type List<T> = T & { next: List<T> }" cannot be reduced during its declaration.
-        // Also, unlike union types, the order of the constituent types is preserved in order that overload resolution
-        // for intersections of types with signatures can be deterministic.
-        function getIntersectionType(types, aliasSymbol, aliasTypeArguments) {
-            if (types.length === 0) {
-                return emptyObjectType;
+        function getContextualTypeForJsxAttribute(attribute) {
+            // When we trying to resolve JsxOpeningLikeElement as a stateless function element, we will already give its attributes a contextual type
+            // which is a type of the parameter of the signature we are trying out.
+            // If there is no contextual type (e.g. we are trying to resolve stateful component), get attributes type from resolving element's tagName
+            var attributesType = getContextualType(attribute.parent);
+            if (ts.isJsxAttribute(attribute)) {
+                if (!attributesType || isTypeAny(attributesType)) {
+                    return undefined;
+                }
+                return getTypeOfPropertyOfType(attributesType, attribute.name.text);
             }
-            var typeSet = [];
-            addTypesToIntersection(typeSet, types);
-            if (typeSet.containsAny) {
-                return anyType;
+            else {
+                return attributesType;
+            }
+        }
+        // Return the contextual type for a given expression node. During overload resolution, a contextual type may temporarily
+        // be "pushed" onto a node using the contextualType property.
+        function getApparentTypeOfContextualType(node) {
+            var type = getContextualType(node);
+            return type && getApparentType(type);
+        }
+        /**
+         * Woah! Do you really want to use this function?
+         *
+         * Unless you're trying to get the *non-apparent* type for a
+         * value-literal type or you're authoring relevant portions of this algorithm,
+         * you probably meant to use 'getApparentTypeOfContextualType'.
+         * Otherwise this may not be very useful.
+         *
+         * In cases where you *are* working on this function, you should understand
+         * when it is appropriate to use 'getContextualType' and 'getApparentTypeOfContextualType'.
+         *
+         *   - Use 'getContextualType' when you are simply going to propagate the result to the expression.
+         *   - Use 'getApparentTypeOfContextualType' when you're going to need the members of the type.
+         *
+         * @param node the expression whose contextual type will be returned.
+         * @returns the contextual type of an expression.
+         */
+        function getContextualType(node) {
+            if (isInsideWithStatementBody(node)) {
+                // We cannot answer semantic questions within a with block, do not proceed any further
+                return undefined;
             }
-            if (typeSet.length === 1) {
-                return typeSet[0];
+            if (node.contextualType) {
+                return node.contextualType;
             }
-            var id = getTypeListId(typeSet);
-            var type = intersectionTypes[id];
-            if (!type) {
-                var propagatedFlags = getPropagatingFlagsOfTypes(typeSet, /*excludeKinds*/ 6144 /* Nullable */);
-                type = intersectionTypes[id] = createObjectType(1048576 /* Intersection */ | propagatedFlags);
-                type.types = typeSet;
-                type.aliasSymbol = aliasSymbol;
-                type.aliasTypeArguments = aliasTypeArguments;
+            var parent = node.parent;
+            switch (parent.kind) {
+                case 226 /* VariableDeclaration */:
+                case 146 /* Parameter */:
+                case 149 /* PropertyDeclaration */:
+                case 148 /* PropertySignature */:
+                case 176 /* BindingElement */:
+                    return getContextualTypeForInitializerExpression(node);
+                case 187 /* ArrowFunction */:
+                case 219 /* ReturnStatement */:
+                    return getContextualTypeForReturnExpression(node);
+                case 197 /* YieldExpression */:
+                    return getContextualTypeForYieldOperand(parent);
+                case 181 /* CallExpression */:
+                case 182 /* NewExpression */:
+                    return getContextualTypeForArgument(parent, node);
+                case 184 /* TypeAssertionExpression */:
+                case 202 /* AsExpression */:
+                    return getTypeFromTypeNode(parent.type);
+                case 194 /* BinaryExpression */:
+                    return getContextualTypeForBinaryOperand(node);
+                case 261 /* PropertyAssignment */:
+                case 262 /* ShorthandPropertyAssignment */:
+                    return getContextualTypeForObjectLiteralElement(parent);
+                case 263 /* SpreadAssignment */:
+                    return getApparentTypeOfContextualType(parent.parent);
+                case 177 /* ArrayLiteralExpression */:
+                    return getContextualTypeForElementExpression(node);
+                case 195 /* ConditionalExpression */:
+                    return getContextualTypeForConditionalOperand(node);
+                case 205 /* TemplateSpan */:
+                    ts.Debug.assert(parent.parent.kind === 196 /* TemplateExpression */);
+                    return getContextualTypeForSubstitutionExpression(parent.parent, node);
+                case 185 /* ParenthesizedExpression */:
+                    return getContextualType(parent);
+                case 256 /* JsxExpression */:
+                    return getContextualTypeForJsxExpression(parent);
+                case 253 /* JsxAttribute */:
+                case 255 /* JsxSpreadAttribute */:
+                    return getContextualTypeForJsxAttribute(parent);
+                case 251 /* JsxOpeningElement */:
+                case 250 /* JsxSelfClosingElement */:
+                    return getAttributesTypeFromJsxOpeningLikeElement(parent);
             }
-            return type;
+            return undefined;
         }
-        function getTypeFromIntersectionTypeNode(node, aliasSymbol, aliasTypeArguments) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                links.resolvedType = getIntersectionType(ts.map(node.types, getTypeFromTypeNodeNoAlias), aliasSymbol, aliasTypeArguments);
-            }
-            return links.resolvedType;
+        function getContextualMapper(node) {
+            node = ts.findAncestor(node, function (n) { return !!n.contextualMapper; });
+            return node ? node.contextualMapper : identityMapper;
         }
-        function getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node, aliasSymbol, aliasTypeArguments) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                // Deferred resolution of members is handled by resolveObjectTypeMembers
-                var type = createObjectType(2097152 /* Anonymous */, node.symbol);
-                type.aliasSymbol = aliasSymbol;
-                type.aliasTypeArguments = aliasTypeArguments;
-                links.resolvedType = type;
+        // If the given type is an object or union type with a single signature, and if that signature has at
+        // least as many parameters as the given function, return the signature. Otherwise return undefined.
+        function getContextualCallSignature(type, node) {
+            var signatures = getSignaturesOfStructuredType(type, 0 /* Call */);
+            if (signatures.length === 1) {
+                var signature = signatures[0];
+                if (!isAritySmaller(signature, node)) {
+                    return signature;
+                }
             }
-            return links.resolvedType;
         }
-        function createLiteralType(flags, text) {
-            var type = createType(flags);
-            type.text = text;
-            return type;
-        }
-        function getFreshTypeOfLiteralType(type) {
-            if (type.flags & 96 /* StringOrNumberLiteral */ && !(type.flags & 16777216 /* FreshLiteral */)) {
-                if (!type.freshType) {
-                    var freshType = createLiteralType(type.flags | 16777216 /* FreshLiteral */, type.text);
-                    freshType.regularType = type;
-                    type.freshType = freshType;
+        /** If the contextual signature has fewer parameters than the function expression, do not use it */
+        function isAritySmaller(signature, target) {
+            var targetParameterCount = 0;
+            for (; targetParameterCount < target.parameters.length; targetParameterCount++) {
+                var param = target.parameters[targetParameterCount];
+                if (param.initializer || param.questionToken || param.dotDotDotToken || isJSDocOptionalParameter(param)) {
+                    break;
                 }
-                return type.freshType;
             }
-            return type;
+            if (target.parameters.length && ts.parameterIsThisKeyword(target.parameters[0])) {
+                targetParameterCount--;
+            }
+            var sourceLength = signature.hasRestParameter ? Number.MAX_VALUE : signature.parameters.length;
+            return sourceLength < targetParameterCount;
         }
-        function getRegularTypeOfLiteralType(type) {
-            return type.flags & 96 /* StringOrNumberLiteral */ && type.flags & 16777216 /* FreshLiteral */ ? type.regularType : type;
+        function isFunctionExpressionOrArrowFunction(node) {
+            return node.kind === 186 /* FunctionExpression */ || node.kind === 187 /* ArrowFunction */;
         }
-        function getLiteralTypeForText(flags, text) {
-            var map = flags & 32 /* StringLiteral */ ? stringLiteralTypes : numericLiteralTypes;
-            return map[text] || (map[text] = createLiteralType(flags, text));
+        function getContextualSignatureForFunctionLikeDeclaration(node) {
+            // Only function expressions, arrow functions, and object literal methods are contextually typed.
+            return isFunctionExpressionOrArrowFunction(node) || ts.isObjectLiteralMethod(node)
+                ? getContextualSignature(node)
+                : undefined;
         }
-        function getTypeFromLiteralTypeNode(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                links.resolvedType = getRegularTypeOfLiteralType(checkExpression(node.literal));
-            }
-            return links.resolvedType;
+        function getContextualTypeForFunctionLikeDeclaration(node) {
+            return ts.isObjectLiteralMethod(node) ?
+                getContextualTypeForObjectLiteralMethod(node) :
+                getApparentTypeOfContextualType(node);
         }
-        function getTypeFromJSDocVariadicType(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                var type = getTypeFromTypeNode(node.type);
-                links.resolvedType = type ? createArrayType(type) : unknownType;
+        // Return the contextual signature for a given expression node. A contextual type provides a
+        // contextual signature if it has a single call signature and if that call signature is non-generic.
+        // If the contextual type is a union type, get the signature from each type possible and if they are
+        // all identical ignoring their return type, the result is same signature but with return type as
+        // union type of return types from these signatures
+        function getContextualSignature(node) {
+            ts.Debug.assert(node.kind !== 151 /* MethodDeclaration */ || ts.isObjectLiteralMethod(node));
+            var type = getContextualTypeForFunctionLikeDeclaration(node);
+            if (!type) {
+                return undefined;
             }
-            return links.resolvedType;
-        }
-        function getTypeFromJSDocTupleType(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                var types = ts.map(node.types, getTypeFromTypeNodeNoAlias);
-                links.resolvedType = createTupleType(types);
+            if (!(type.flags & 65536 /* Union */)) {
+                return getContextualCallSignature(type, node);
             }
-            return links.resolvedType;
-        }
-        function getThisType(node) {
-            var container = ts.getThisContainer(node, /*includeArrowFunctions*/ false);
-            var parent = container && container.parent;
-            if (parent && (ts.isClassLike(parent) || parent.kind === 222 /* InterfaceDeclaration */)) {
-                if (!(ts.getModifierFlags(container) & 32 /* Static */) &&
-                    (container.kind !== 148 /* Constructor */ || ts.isNodeDescendantOf(node, container.body))) {
-                    return getDeclaredTypeOfClassOrInterface(getSymbolOfNode(parent)).thisType;
+            var signatureList;
+            var types = type.types;
+            for (var _i = 0, types_15 = types; _i < types_15.length; _i++) {
+                var current = types_15[_i];
+                var signature = getContextualCallSignature(current, node);
+                if (signature) {
+                    if (!signatureList) {
+                        // This signature will contribute to contextual union signature
+                        signatureList = [signature];
+                    }
+                    else if (!compareSignaturesIdentical(signatureList[0], signature, /*partialMatch*/ false, /*ignoreThisTypes*/ true, /*ignoreReturnTypes*/ true, compareTypesIdentical)) {
+                        // Signatures aren't identical, do not use
+                        return undefined;
+                    }
+                    else {
+                        // Use this signature for contextual union signature
+                        signatureList.push(signature);
+                    }
                 }
             }
-            error(node, ts.Diagnostics.A_this_type_is_available_only_in_a_non_static_member_of_a_class_or_interface);
-            return unknownType;
-        }
-        function getTypeFromThisTypeNode(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                links.resolvedType = getThisType(node);
-            }
-            return links.resolvedType;
-        }
-        function getTypeFromTypeNodeNoAlias(type) {
-            return getTypeFromTypeNode(type, /*aliasSymbol*/ undefined, /*aliasTypeArguments*/ undefined);
-        }
-        function getTypeFromTypeNode(node, aliasSymbol, aliasTypeArguments) {
-            switch (node.kind) {
-                case 117 /* AnyKeyword */:
-                case 258 /* JSDocAllType */:
-                case 259 /* JSDocUnknownType */:
-                    return anyType;
-                case 132 /* StringKeyword */:
-                    return stringType;
-                case 130 /* NumberKeyword */:
-                    return numberType;
-                case 120 /* BooleanKeyword */:
-                    return booleanType;
-                case 133 /* SymbolKeyword */:
-                    return esSymbolType;
-                case 103 /* VoidKeyword */:
-                    return voidType;
-                case 135 /* UndefinedKeyword */:
-                    return undefinedType;
-                case 93 /* NullKeyword */:
-                    return nullType;
-                case 127 /* NeverKeyword */:
-                    return neverType;
-                case 283 /* JSDocNullKeyword */:
-                    return nullType;
-                case 284 /* JSDocUndefinedKeyword */:
-                    return undefinedType;
-                case 285 /* JSDocNeverKeyword */:
-                    return neverType;
-                case 165 /* ThisType */:
-                case 97 /* ThisKeyword */:
-                    return getTypeFromThisTypeNode(node);
-                case 166 /* LiteralType */:
-                    return getTypeFromLiteralTypeNode(node);
-                case 282 /* JSDocLiteralType */:
-                    return getTypeFromLiteralTypeNode(node.literal);
-                case 155 /* TypeReference */:
-                case 267 /* JSDocTypeReference */:
-                    return getTypeFromTypeReference(node);
-                case 154 /* TypePredicate */:
-                    return booleanType;
-                case 194 /* ExpressionWithTypeArguments */:
-                    return getTypeFromTypeReference(node);
-                case 158 /* TypeQuery */:
-                    return getTypeFromTypeQueryNode(node);
-                case 160 /* ArrayType */:
-                case 260 /* JSDocArrayType */:
-                    return getTypeFromArrayTypeNode(node);
-                case 161 /* TupleType */:
-                    return getTypeFromTupleTypeNode(node);
-                case 162 /* UnionType */:
-                case 261 /* JSDocUnionType */:
-                    return getTypeFromUnionTypeNode(node, aliasSymbol, aliasTypeArguments);
-                case 163 /* IntersectionType */:
-                    return getTypeFromIntersectionTypeNode(node, aliasSymbol, aliasTypeArguments);
-                case 164 /* ParenthesizedType */:
-                case 263 /* JSDocNullableType */:
-                case 264 /* JSDocNonNullableType */:
-                case 271 /* JSDocConstructorType */:
-                case 272 /* JSDocThisType */:
-                case 268 /* JSDocOptionalType */:
-                    return getTypeFromTypeNode(node.type);
-                case 265 /* JSDocRecordType */:
-                    return getTypeFromTypeNode(node.literal);
-                case 156 /* FunctionType */:
-                case 157 /* ConstructorType */:
-                case 159 /* TypeLiteral */:
-                case 281 /* JSDocTypeLiteral */:
-                case 269 /* JSDocFunctionType */:
-                    return getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node, aliasSymbol, aliasTypeArguments);
-                // This function assumes that an identifier or qualified name is a type expression
-                // Callers should first ensure this by calling isTypeNode
-                case 69 /* Identifier */:
-                case 139 /* QualifiedName */:
-                    var symbol = getSymbolAtLocation(node);
-                    return symbol && getDeclaredTypeOfSymbol(symbol);
-                case 262 /* JSDocTupleType */:
-                    return getTypeFromJSDocTupleType(node);
-                case 270 /* JSDocVariadicType */:
-                    return getTypeFromJSDocVariadicType(node);
-                default:
-                    return unknownType;
+            // Result is union of signatures collected (return type is union of return types of this signature set)
+            var result;
+            if (signatureList) {
+                result = cloneSignature(signatureList[0]);
+                // Clear resolved return type we possibly got from cloneSignature
+                result.resolvedReturnType = undefined;
+                result.unionSignatures = signatureList;
             }
+            return result;
         }
-        function instantiateList(items, mapper, instantiator) {
-            if (items && items.length) {
-                var result = [];
-                for (var _i = 0, items_1 = items; _i < items_1.length; _i++) {
-                    var v = items_1[_i];
-                    result.push(instantiator(v, mapper));
-                }
-                return result;
+        function checkSpreadExpression(node, checkMode) {
+            if (languageVersion < 2 /* ES2015 */ && compilerOptions.downlevelIteration) {
+                checkExternalEmitHelpers(node, 1536 /* SpreadIncludes */);
             }
-            return items;
-        }
-        function createUnaryTypeMapper(source, target) {
-            return function (t) { return t === source ? target : t; };
+            var arrayOrIterableType = checkExpression(node.expression, checkMode);
+            return checkIteratedTypeOrElementType(arrayOrIterableType, node.expression, /*allowStringInput*/ false, /*allowAsyncIterables*/ false);
         }
-        function createBinaryTypeMapper(source1, target1, source2, target2) {
-            return function (t) { return t === source1 ? target1 : t === source2 ? target2 : t; };
+        function hasDefaultValue(node) {
+            return (node.kind === 176 /* BindingElement */ && !!node.initializer) ||
+                (node.kind === 194 /* BinaryExpression */ && node.operatorToken.kind === 58 /* EqualsToken */);
         }
-        function createArrayTypeMapper(sources, targets) {
-            return function (t) {
-                for (var i = 0; i < sources.length; i++) {
-                    if (t === sources[i]) {
-                        return targets ? targets[i] : anyType;
+        function checkArrayLiteral(node, checkMode) {
+            var elements = node.elements;
+            var hasSpreadElement = false;
+            var elementTypes = [];
+            var inDestructuringPattern = ts.isAssignmentTarget(node);
+            for (var _i = 0, elements_1 = elements; _i < elements_1.length; _i++) {
+                var e = elements_1[_i];
+                if (inDestructuringPattern && e.kind === 198 /* SpreadElement */) {
+                    // Given the following situation:
+                    //    var c: {};
+                    //    [...c] = ["", 0];
+                    //
+                    // c is represented in the tree as a spread element in an array literal.
+                    // But c really functions as a rest element, and its purpose is to provide
+                    // a contextual type for the right hand side of the assignment. Therefore,
+                    // instead of calling checkExpression on "...c", which will give an error
+                    // if c is not iterable/array-like, we need to act as if we are trying to
+                    // get the contextual element type from it. So we do something similar to
+                    // getContextualTypeForElementExpression, which will crucially not error
+                    // if there is no index type / iterated type.
+                    var restArrayType = checkExpression(e.expression, checkMode);
+                    var restElementType = getIndexTypeOfType(restArrayType, 1 /* Number */) ||
+                        getIteratedTypeOrElementType(restArrayType, /*errorNode*/ undefined, /*allowStringInput*/ false, /*allowAsyncIterables*/ false, /*checkAssignability*/ false);
+                    if (restElementType) {
+                        elementTypes.push(restElementType);
                     }
                 }
-                return t;
-            };
-        }
-        function createTypeMapper(sources, targets) {
-            var count = sources.length;
-            var mapper = count == 1 ? createUnaryTypeMapper(sources[0], targets ? targets[0] : anyType) :
-                count == 2 ? createBinaryTypeMapper(sources[0], targets ? targets[0] : anyType, sources[1], targets ? targets[1] : anyType) :
-                    createArrayTypeMapper(sources, targets);
-            mapper.mappedTypes = sources;
-            mapper.targetTypes = targets;
-            return mapper;
-        }
-        function createTypeEraser(sources) {
-            return createTypeMapper(sources, undefined);
-        }
-        function getInferenceMapper(context) {
-            if (!context.mapper) {
-                var mapper = function (t) {
-                    var typeParameters = context.signature.typeParameters;
-                    for (var i = 0; i < typeParameters.length; i++) {
-                        if (t === typeParameters[i]) {
-                            context.inferences[i].isFixed = true;
-                            return getInferredType(context, i);
+                else {
+                    var type = checkExpressionForMutableLocation(e, checkMode);
+                    elementTypes.push(type);
+                }
+                hasSpreadElement = hasSpreadElement || e.kind === 198 /* SpreadElement */;
+            }
+            if (!hasSpreadElement) {
+                // If array literal is actually a destructuring pattern, mark it as an implied type. We do this such
+                // that we get the same behavior for "var [x, y] = []" and "[x, y] = []".
+                if (inDestructuringPattern && elementTypes.length) {
+                    var type = cloneTypeReference(createTupleType(elementTypes));
+                    type.pattern = node;
+                    return type;
+                }
+                var contextualType = getApparentTypeOfContextualType(node);
+                if (contextualType && contextualTypeIsTupleLikeType(contextualType)) {
+                    var pattern = contextualType.pattern;
+                    // If array literal is contextually typed by a binding pattern or an assignment pattern, pad the resulting
+                    // tuple type with the corresponding binding or assignment element types to make the lengths equal.
+                    if (pattern && (pattern.kind === 175 /* ArrayBindingPattern */ || pattern.kind === 177 /* ArrayLiteralExpression */)) {
+                        var patternElements = pattern.elements;
+                        for (var i = elementTypes.length; i < patternElements.length; i++) {
+                            var patternElement = patternElements[i];
+                            if (hasDefaultValue(patternElement)) {
+                                elementTypes.push(contextualType.typeArguments[i]);
+                            }
+                            else {
+                                if (patternElement.kind !== 200 /* OmittedExpression */) {
+                                    error(patternElement, ts.Diagnostics.Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value);
+                                }
+                                elementTypes.push(unknownType);
+                            }
                         }
                     }
-                    return t;
-                };
-                mapper.mappedTypes = context.signature.typeParameters;
-                mapper.context = context;
-                context.mapper = mapper;
+                    if (elementTypes.length) {
+                        return createTupleType(elementTypes);
+                    }
+                }
             }
-            return context.mapper;
+            return createArrayType(elementTypes.length ?
+                getUnionType(elementTypes, /*subtypeReduction*/ true) :
+                strictNullChecks ? neverType : undefinedWideningType);
         }
-        function identityMapper(type) {
-            return type;
+        function isNumericName(name) {
+            return name.kind === 144 /* ComputedPropertyName */ ? isNumericComputedName(name) : isNumericLiteralName(name.text);
         }
-        function combineTypeMappers(mapper1, mapper2) {
-            var mapper = function (t) { return instantiateType(mapper1(t), mapper2); };
-            mapper.mappedTypes = mapper1.mappedTypes;
-            return mapper;
+        function isNumericComputedName(name) {
+            // It seems odd to consider an expression of type Any to result in a numeric name,
+            // but this behavior is consistent with checkIndexedAccess
+            return isTypeAnyOrAllConstituentTypesHaveKind(checkComputedPropertyName(name), 84 /* NumberLike */);
         }
-        function cloneTypeParameter(typeParameter) {
-            var result = createType(16384 /* TypeParameter */);
-            result.symbol = typeParameter.symbol;
-            result.target = typeParameter;
-            return result;
+        function isTypeAnyOrAllConstituentTypesHaveKind(type, kind) {
+            return isTypeAny(type) || isTypeOfKind(type, kind);
         }
-        function cloneTypePredicate(predicate, mapper) {
-            if (ts.isIdentifierTypePredicate(predicate)) {
-                return {
-                    kind: 1 /* Identifier */,
-                    parameterName: predicate.parameterName,
-                    parameterIndex: predicate.parameterIndex,
-                    type: instantiateType(predicate.type, mapper)
-                };
-            }
-            else {
-                return {
-                    kind: 0 /* This */,
-                    type: instantiateType(predicate.type, mapper)
-                };
-            }
+        function isInfinityOrNaNString(name) {
+            return name === "Infinity" || name === "-Infinity" || name === "NaN";
         }
-        function instantiateSignature(signature, mapper, eraseTypeParameters) {
-            var freshTypeParameters;
-            var freshTypePredicate;
-            if (signature.typeParameters && !eraseTypeParameters) {
-                // First create a fresh set of type parameters, then include a mapping from the old to the
-                // new type parameters in the mapper function. Finally store this mapper in the new type
-                // parameters such that we can use it when instantiating constraints.
-                freshTypeParameters = ts.map(signature.typeParameters, cloneTypeParameter);
-                mapper = combineTypeMappers(createTypeMapper(signature.typeParameters, freshTypeParameters), mapper);
-                for (var _i = 0, freshTypeParameters_1 = freshTypeParameters; _i < freshTypeParameters_1.length; _i++) {
-                    var tp = freshTypeParameters_1[_i];
-                    tp.mapper = mapper;
-                }
-            }
-            if (signature.typePredicate) {
-                freshTypePredicate = cloneTypePredicate(signature.typePredicate, mapper);
-            }
-            var result = createSignature(signature.declaration, freshTypeParameters, signature.thisParameter && instantiateSymbol(signature.thisParameter, mapper), instantiateList(signature.parameters, mapper, instantiateSymbol), instantiateType(signature.resolvedReturnType, mapper), freshTypePredicate, signature.minArgumentCount, signature.hasRestParameter, signature.hasLiteralTypes);
-            result.target = signature;
-            result.mapper = mapper;
-            return result;
+        function isNumericLiteralName(name) {
+            // The intent of numeric names is that
+            //     - they are names with text in a numeric form, and that
+            //     - setting properties/indexing with them is always equivalent to doing so with the numeric literal 'numLit',
+            //         acquired by applying the abstract 'ToNumber' operation on the name's text.
+            //
+            // The subtlety is in the latter portion, as we cannot reliably say that anything that looks like a numeric literal is a numeric name.
+            // In fact, it is the case that the text of the name must be equal to 'ToString(numLit)' for this to hold.
+            //
+            // Consider the property name '"0xF00D"'. When one indexes with '0xF00D', they are actually indexing with the value of 'ToString(0xF00D)'
+            // according to the ECMAScript specification, so it is actually as if the user indexed with the string '"61453"'.
+            // Thus, the text of all numeric literals equivalent to '61543' such as '0xF00D', '0xf00D', '0170015', etc. are not valid numeric names
+            // because their 'ToString' representation is not equal to their original text.
+            // This is motivated by ECMA-262 sections 9.3.1, 9.8.1, 11.1.5, and 11.2.1.
+            //
+            // Here, we test whether 'ToString(ToNumber(name))' is exactly equal to 'name'.
+            // The '+' prefix operator is equivalent here to applying the abstract ToNumber operation.
+            // Applying the 'toString()' method on a number gives us the abstract ToString operation on a number.
+            //
+            // Note that this accepts the values 'Infinity', '-Infinity', and 'NaN', and that this is intentional.
+            // This is desired behavior, because when indexing with them as numeric entities, you are indexing
+            // with the strings '"Infinity"', '"-Infinity"', and '"NaN"' respectively.
+            return (+name).toString() === name;
         }
-        function instantiateSymbol(symbol, mapper) {
-            if (symbol.flags & 16777216 /* Instantiated */) {
-                var links = getSymbolLinks(symbol);
-                // If symbol being instantiated is itself a instantiation, fetch the original target and combine the
-                // type mappers. This ensures that original type identities are properly preserved and that aliases
-                // always reference a non-aliases.
-                symbol = links.target;
-                mapper = combineTypeMappers(links.mapper, mapper);
-            }
-            // Keep the flags from the symbol we're instantiating.  Mark that is instantiated, and
-            // also transient so that we can just store data on it directly.
-            var result = createSymbol(16777216 /* Instantiated */ | 67108864 /* Transient */ | symbol.flags, symbol.name);
-            result.declarations = symbol.declarations;
-            result.parent = symbol.parent;
-            result.target = symbol;
-            result.mapper = mapper;
-            if (symbol.valueDeclaration) {
-                result.valueDeclaration = symbol.valueDeclaration;
+        function checkComputedPropertyName(node) {
+            var links = getNodeLinks(node.expression);
+            if (!links.resolvedType) {
+                links.resolvedType = checkExpression(node.expression);
+                // This will allow types number, string, symbol or any. It will also allow enums, the unknown
+                // type, and any union of these types (like string | number).
+                if (!isTypeAnyOrAllConstituentTypesHaveKind(links.resolvedType, 84 /* NumberLike */ | 262178 /* StringLike */ | 512 /* ESSymbol */)) {
+                    error(node, ts.Diagnostics.A_computed_property_name_must_be_of_type_string_number_symbol_or_any);
+                }
+                else {
+                    checkThatExpressionIsProperSymbolReference(node.expression, links.resolvedType, /*reportError*/ true);
+                }
             }
-            return result;
+            return links.resolvedType;
         }
-        function instantiateAnonymousType(type, mapper) {
-            if (mapper.instantiations) {
-                var cachedType = mapper.instantiations[type.id];
-                if (cachedType) {
-                    return cachedType;
+        function getObjectLiteralIndexInfo(propertyNodes, offset, properties, kind) {
+            var propTypes = [];
+            for (var i = 0; i < properties.length; i++) {
+                if (kind === 0 /* String */ || isNumericName(propertyNodes[i + offset].name)) {
+                    propTypes.push(getTypeOfSymbol(properties[i]));
                 }
             }
-            else {
-                mapper.instantiations = [];
-            }
-            // Mark the anonymous type as instantiated such that our infinite instantiation detection logic can recognize it
-            var result = createObjectType(2097152 /* Anonymous */ | 4194304 /* Instantiated */, type.symbol);
-            result.target = type;
-            result.mapper = mapper;
-            result.aliasSymbol = type.aliasSymbol;
-            result.aliasTypeArguments = mapper.targetTypes;
-            mapper.instantiations[type.id] = result;
-            return result;
+            var unionType = propTypes.length ? getUnionType(propTypes, /*subtypeReduction*/ true) : undefinedType;
+            return createIndexInfo(unionType, /*isReadonly*/ false);
         }
-        function isSymbolInScopeOfMappedTypeParameter(symbol, mapper) {
-            var mappedTypes = mapper.mappedTypes;
-            // Starting with the parent of the symbol's declaration, check if the mapper maps any of
-            // the type parameters introduced by enclosing declarations. We just pick the first
-            // declaration since multiple declarations will all have the same parent anyway.
-            var node = symbol.declarations[0].parent;
-            while (node) {
-                switch (node.kind) {
-                    case 156 /* FunctionType */:
-                    case 157 /* ConstructorType */:
-                    case 220 /* FunctionDeclaration */:
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                    case 148 /* Constructor */:
-                    case 151 /* CallSignature */:
-                    case 152 /* ConstructSignature */:
-                    case 153 /* IndexSignature */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                    case 179 /* FunctionExpression */:
-                    case 180 /* ArrowFunction */:
-                    case 221 /* ClassDeclaration */:
-                    case 192 /* ClassExpression */:
-                    case 222 /* InterfaceDeclaration */:
-                    case 223 /* TypeAliasDeclaration */:
-                        var declaration = node;
-                        if (declaration.typeParameters) {
-                            for (var _i = 0, _a = declaration.typeParameters; _i < _a.length; _i++) {
-                                var d = _a[_i];
-                                if (ts.contains(mappedTypes, getDeclaredTypeOfTypeParameter(getSymbolOfNode(d)))) {
-                                    return true;
-                                }
-                            }
+        function checkObjectLiteral(node, checkMode) {
+            var inDestructuringPattern = ts.isAssignmentTarget(node);
+            // Grammar checking
+            checkGrammarObjectLiteralExpression(node, inDestructuringPattern);
+            var propertiesTable = ts.createMap();
+            var propertiesArray = [];
+            var spread = emptyObjectType;
+            var propagatedFlags = 0;
+            var contextualType = getApparentTypeOfContextualType(node);
+            var contextualTypeHasPattern = contextualType && contextualType.pattern &&
+                (contextualType.pattern.kind === 174 /* ObjectBindingPattern */ || contextualType.pattern.kind === 178 /* ObjectLiteralExpression */);
+            var isJSObjectLiteral = !contextualType && ts.isInJavaScriptFile(node);
+            var typeFlags = 0;
+            var patternWithComputedProperties = false;
+            var hasComputedStringProperty = false;
+            var hasComputedNumberProperty = false;
+            var offset = 0;
+            for (var i = 0; i < node.properties.length; i++) {
+                var memberDecl = node.properties[i];
+                var member = memberDecl.symbol;
+                if (memberDecl.kind === 261 /* PropertyAssignment */ ||
+                    memberDecl.kind === 262 /* ShorthandPropertyAssignment */ ||
+                    ts.isObjectLiteralMethod(memberDecl)) {
+                    var type = void 0;
+                    if (memberDecl.kind === 261 /* PropertyAssignment */) {
+                        type = checkPropertyAssignment(memberDecl, checkMode);
+                    }
+                    else if (memberDecl.kind === 151 /* MethodDeclaration */) {
+                        type = checkObjectLiteralMethod(memberDecl, checkMode);
+                    }
+                    else {
+                        ts.Debug.assert(memberDecl.kind === 262 /* ShorthandPropertyAssignment */);
+                        type = checkExpressionForMutableLocation(memberDecl.name, checkMode);
+                    }
+                    typeFlags |= type.flags;
+                    var prop = createSymbol(4 /* Property */ | member.flags, member.name);
+                    if (inDestructuringPattern) {
+                        // If object literal is an assignment pattern and if the assignment pattern specifies a default value
+                        // for the property, make the property optional.
+                        var isOptional = (memberDecl.kind === 261 /* PropertyAssignment */ && hasDefaultValue(memberDecl.initializer)) ||
+                            (memberDecl.kind === 262 /* ShorthandPropertyAssignment */ && memberDecl.objectAssignmentInitializer);
+                        if (isOptional) {
+                            prop.flags |= 67108864 /* Optional */;
                         }
-                        if (ts.isClassLike(node) || node.kind === 222 /* InterfaceDeclaration */) {
-                            var thisType = getDeclaredTypeOfClassOrInterface(getSymbolOfNode(node)).thisType;
-                            if (thisType && ts.contains(mappedTypes, thisType)) {
-                                return true;
-                            }
+                        if (ts.hasDynamicName(memberDecl)) {
+                            patternWithComputedProperties = true;
                         }
-                        break;
-                    case 225 /* ModuleDeclaration */:
-                    case 256 /* SourceFile */:
-                        return false;
-                }
-                node = node.parent;
-            }
-            return false;
-        }
-        function instantiateType(type, mapper) {
-            if (type && mapper !== identityMapper) {
-                if (type.flags & 16384 /* TypeParameter */) {
-                    return mapper(type);
+                    }
+                    else if (contextualTypeHasPattern && !(getObjectFlags(contextualType) & 512 /* ObjectLiteralPatternWithComputedProperties */)) {
+                        // If object literal is contextually typed by the implied type of a binding pattern, and if the
+                        // binding pattern specifies a default value for the property, make the property optional.
+                        var impliedProp = getPropertyOfType(contextualType, member.name);
+                        if (impliedProp) {
+                            prop.flags |= impliedProp.flags & 67108864 /* Optional */;
+                        }
+                        else if (!compilerOptions.suppressExcessPropertyErrors && !getIndexInfoOfType(contextualType, 0 /* String */)) {
+                            error(memberDecl.name, ts.Diagnostics.Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1, symbolToString(member), typeToString(contextualType));
+                        }
+                    }
+                    prop.declarations = member.declarations;
+                    prop.parent = member.parent;
+                    if (member.valueDeclaration) {
+                        prop.valueDeclaration = member.valueDeclaration;
+                    }
+                    prop.type = type;
+                    prop.target = member;
+                    member = prop;
                 }
-                if (type.flags & 2097152 /* Anonymous */) {
-                    // If the anonymous type originates in a declaration of a function, method, class, or
-                    // interface, in an object type literal, or in an object literal expression, we may need
-                    // to instantiate the type because it might reference a type parameter. We skip instantiation
-                    // if none of the type parameters that are in scope in the type's declaration are mapped by
-                    // the given mapper, however we can only do that analysis if the type isn't itself an
-                    // instantiation.
-                    return type.symbol &&
-                        type.symbol.flags & (16 /* Function */ | 8192 /* Method */ | 32 /* Class */ | 2048 /* TypeLiteral */ | 4096 /* ObjectLiteral */) &&
-                        (type.flags & 4194304 /* Instantiated */ || isSymbolInScopeOfMappedTypeParameter(type.symbol, mapper)) ?
-                        instantiateAnonymousType(type, mapper) : type;
+                else if (memberDecl.kind === 263 /* SpreadAssignment */) {
+                    if (languageVersion < 2 /* ES2015 */) {
+                        checkExternalEmitHelpers(memberDecl, 2 /* Assign */);
+                    }
+                    if (propertiesArray.length > 0) {
+                        spread = getSpreadType(spread, createObjectLiteralType());
+                        propertiesArray = [];
+                        propertiesTable = ts.createMap();
+                        hasComputedStringProperty = false;
+                        hasComputedNumberProperty = false;
+                        typeFlags = 0;
+                    }
+                    var type = checkExpression(memberDecl.expression);
+                    if (!isValidSpreadType(type)) {
+                        error(memberDecl, ts.Diagnostics.Spread_types_may_only_be_created_from_object_types);
+                        return unknownType;
+                    }
+                    spread = getSpreadType(spread, type);
+                    offset = i + 1;
+                    continue;
                 }
-                if (type.flags & 131072 /* Reference */) {
-                    return createTypeReference(type.target, instantiateList(type.typeArguments, mapper, instantiateType));
+                else {
+                    // TypeScript 1.0 spec (April 2014)
+                    // A get accessor declaration is processed in the same manner as
+                    // an ordinary function declaration(section 6.1) with no parameters.
+                    // A set accessor declaration is processed in the same manner
+                    // as an ordinary function declaration with a single parameter and a Void return type.
+                    ts.Debug.assert(memberDecl.kind === 153 /* GetAccessor */ || memberDecl.kind === 154 /* SetAccessor */);
+                    checkNodeDeferred(memberDecl);
                 }
-                if (type.flags & 524288 /* Union */ && !(type.flags & 8190 /* Primitive */)) {
-                    return getUnionType(instantiateList(type.types, mapper, instantiateType), /*subtypeReduction*/ false, type.aliasSymbol, mapper.targetTypes);
+                if (ts.hasDynamicName(memberDecl)) {
+                    if (isNumericName(memberDecl.name)) {
+                        hasComputedNumberProperty = true;
+                    }
+                    else {
+                        hasComputedStringProperty = true;
+                    }
                 }
-                if (type.flags & 1048576 /* Intersection */) {
-                    return getIntersectionType(instantiateList(type.types, mapper, instantiateType), type.aliasSymbol, mapper.targetTypes);
+                else {
+                    propertiesTable.set(member.name, member);
                 }
+                propertiesArray.push(member);
             }
-            return type;
-        }
-        function instantiateIndexInfo(info, mapper) {
-            return info && createIndexInfo(instantiateType(info.type, mapper), info.isReadonly, info.declaration);
-        }
-        // Returns true if the given expression contains (at any level of nesting) a function or arrow expression
-        // that is subject to contextual typing.
-        function isContextSensitive(node) {
-            ts.Debug.assert(node.kind !== 147 /* MethodDeclaration */ || ts.isObjectLiteralMethod(node));
-            switch (node.kind) {
-                case 179 /* FunctionExpression */:
-                case 180 /* ArrowFunction */:
-                    return isContextSensitiveFunctionLikeDeclaration(node);
-                case 171 /* ObjectLiteralExpression */:
-                    return ts.forEach(node.properties, isContextSensitive);
-                case 170 /* ArrayLiteralExpression */:
-                    return ts.forEach(node.elements, isContextSensitive);
-                case 188 /* ConditionalExpression */:
-                    return isContextSensitive(node.whenTrue) ||
-                        isContextSensitive(node.whenFalse);
-                case 187 /* BinaryExpression */:
-                    return node.operatorToken.kind === 52 /* BarBarToken */ &&
-                        (isContextSensitive(node.left) || isContextSensitive(node.right));
-                case 253 /* PropertyAssignment */:
-                    return isContextSensitive(node.initializer);
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                    return isContextSensitiveFunctionLikeDeclaration(node);
-                case 178 /* ParenthesizedExpression */:
-                    return isContextSensitive(node.expression);
-            }
-            return false;
-        }
-        function isContextSensitiveFunctionLikeDeclaration(node) {
-            var areAllParametersUntyped = !ts.forEach(node.parameters, function (p) { return p.type; });
-            var isNullaryArrow = node.kind === 180 /* ArrowFunction */ && !node.parameters.length;
-            return !node.typeParameters && areAllParametersUntyped && !isNullaryArrow;
-        }
-        function isContextSensitiveFunctionOrObjectLiteralMethod(func) {
-            return (isFunctionExpressionOrArrowFunction(func) || ts.isObjectLiteralMethod(func)) && isContextSensitiveFunctionLikeDeclaration(func);
-        }
-        function getTypeWithoutSignatures(type) {
-            if (type.flags & 2588672 /* ObjectType */) {
-                var resolved = resolveStructuredTypeMembers(type);
-                if (resolved.constructSignatures.length) {
-                    var result = createObjectType(2097152 /* Anonymous */, type.symbol);
-                    result.members = resolved.members;
-                    result.properties = resolved.properties;
-                    result.callSignatures = emptyArray;
-                    result.constructSignatures = emptyArray;
-                    type = result;
+            // If object literal is contextually typed by the implied type of a binding pattern, augment the result
+            // type with those properties for which the binding pattern specifies a default value.
+            if (contextualTypeHasPattern) {
+                for (var _i = 0, _a = getPropertiesOfType(contextualType); _i < _a.length; _i++) {
+                    var prop = _a[_i];
+                    if (!propertiesTable.get(prop.name)) {
+                        if (!(prop.flags & 67108864 /* Optional */)) {
+                            error(prop.valueDeclaration || prop.bindingElement, ts.Diagnostics.Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value);
+                        }
+                        propertiesTable.set(prop.name, prop);
+                        propertiesArray.push(prop);
+                    }
                 }
             }
-            return type;
-        }
-        // TYPE CHECKING
-        function isTypeIdenticalTo(source, target) {
-            return isTypeRelatedTo(source, target, identityRelation);
-        }
-        function compareTypesIdentical(source, target) {
-            return isTypeRelatedTo(source, target, identityRelation) ? -1 /* True */ : 0 /* False */;
-        }
-        function compareTypesAssignable(source, target) {
-            return isTypeRelatedTo(source, target, assignableRelation) ? -1 /* True */ : 0 /* False */;
+            if (spread !== emptyObjectType) {
+                if (propertiesArray.length > 0) {
+                    spread = getSpreadType(spread, createObjectLiteralType());
+                }
+                if (spread.flags & 32768 /* Object */) {
+                    // only set the symbol and flags if this is a (fresh) object type
+                    spread.flags |= propagatedFlags;
+                    spread.flags |= 1048576 /* FreshLiteral */;
+                    spread.objectFlags |= 128 /* ObjectLiteral */;
+                    spread.symbol = node.symbol;
+                }
+                return spread;
+            }
+            return createObjectLiteralType();
+            function createObjectLiteralType() {
+                var stringIndexInfo = isJSObjectLiteral ? jsObjectLiteralIndexInfo : hasComputedStringProperty ? getObjectLiteralIndexInfo(node.properties, offset, propertiesArray, 0 /* String */) : undefined;
+                var numberIndexInfo = hasComputedNumberProperty && !isJSObjectLiteral ? getObjectLiteralIndexInfo(node.properties, offset, propertiesArray, 1 /* Number */) : undefined;
+                var result = createAnonymousType(node.symbol, propertiesTable, emptyArray, emptyArray, stringIndexInfo, numberIndexInfo);
+                var freshObjectLiteralFlag = compilerOptions.suppressExcessPropertyErrors ? 0 : 1048576 /* FreshLiteral */;
+                result.flags |= 4194304 /* ContainsObjectLiteral */ | freshObjectLiteralFlag | (typeFlags & 14680064 /* PropagatingFlags */);
+                result.objectFlags |= 128 /* ObjectLiteral */;
+                if (patternWithComputedProperties) {
+                    result.objectFlags |= 512 /* ObjectLiteralPatternWithComputedProperties */;
+                }
+                if (inDestructuringPattern) {
+                    result.pattern = node;
+                }
+                if (!(result.flags & 6144 /* Nullable */)) {
+                    propagatedFlags |= (result.flags & 14680064 /* PropagatingFlags */);
+                }
+                return result;
+            }
         }
-        function isTypeSubtypeOf(source, target) {
-            return isTypeRelatedTo(source, target, subtypeRelation);
+        function isValidSpreadType(type) {
+            return !!(type.flags & (1 /* Any */ | 4096 /* Null */ | 2048 /* Undefined */ | 16777216 /* NonPrimitive */) ||
+                type.flags & 32768 /* Object */ && !isGenericMappedType(type) ||
+                type.flags & 196608 /* UnionOrIntersection */ && !ts.forEach(type.types, function (t) { return !isValidSpreadType(t); }));
         }
-        function isTypeAssignableTo(source, target) {
-            return isTypeRelatedTo(source, target, assignableRelation);
+        function checkJsxSelfClosingElement(node) {
+            checkJsxOpeningLikeElement(node);
+            return getJsxGlobalElementType() || anyType;
         }
-        // A type S is considered to be an instance of a type T if S and T are the same type or if S is a
-        // subtype of T but not structurally identical to T. This specifically means that two distinct but
-        // structurally identical types (such as two classes) are not considered instances of each other.
-        function isTypeInstanceOf(source, target) {
-            return source === target || isTypeSubtypeOf(source, target) && !isTypeIdenticalTo(source, target);
+        function checkJsxElement(node) {
+            // Check attributes
+            checkJsxOpeningLikeElement(node.openingElement);
+            // Perform resolution on the closing tag so that rename/go to definition/etc work
+            if (isJsxIntrinsicIdentifier(node.closingElement.tagName)) {
+                getIntrinsicTagSymbol(node.closingElement);
+            }
+            else {
+                checkExpression(node.closingElement.tagName);
+            }
+            return getJsxGlobalElementType() || anyType;
         }
         /**
-         * This is *not* a bi-directional relationship.
-         * If one needs to check both directions for comparability, use a second call to this function or 'checkTypeComparableTo'.
+         * Returns true iff the JSX element name would be a valid JS identifier, ignoring restrictions about keywords not being identifiers
          */
-        function isTypeComparableTo(source, target) {
-            return isTypeRelatedTo(source, target, comparableRelation);
-        }
-        function areTypesComparable(type1, type2) {
-            return isTypeComparableTo(type1, type2) || isTypeComparableTo(type2, type1);
-        }
-        function checkTypeSubtypeOf(source, target, errorNode, headMessage, containingMessageChain) {
-            return checkTypeRelatedTo(source, target, subtypeRelation, errorNode, headMessage, containingMessageChain);
-        }
-        function checkTypeAssignableTo(source, target, errorNode, headMessage, containingMessageChain) {
-            return checkTypeRelatedTo(source, target, assignableRelation, errorNode, headMessage, containingMessageChain);
+        function isUnhyphenatedJsxName(name) {
+            // - is the only character supported in JSX attribute names that isn't valid in JavaScript identifiers
+            return name.indexOf("-") < 0;
         }
         /**
-         * This is *not* a bi-directional relationship.
-         * If one needs to check both directions for comparability, use a second call to this function or 'isTypeComparableTo'.
+         * Returns true iff React would emit this tag name as a string rather than an identifier or qualified name
          */
-        function checkTypeComparableTo(source, target, errorNode, headMessage, containingMessageChain) {
-            return checkTypeRelatedTo(source, target, comparableRelation, errorNode, headMessage, containingMessageChain);
-        }
-        function isSignatureAssignableTo(source, target, ignoreReturnTypes) {
-            return compareSignaturesRelated(source, target, ignoreReturnTypes, /*reportErrors*/ false, /*errorReporter*/ undefined, compareTypesAssignable) !== 0 /* False */;
+        function isJsxIntrinsicIdentifier(tagName) {
+            // TODO (yuisu): comment
+            if (tagName.kind === 179 /* PropertyAccessExpression */ || tagName.kind === 99 /* ThisKeyword */) {
+                return false;
+            }
+            else {
+                return ts.isIntrinsicJsxName(tagName.text);
+            }
         }
         /**
-         * See signatureRelatedTo, compareSignaturesIdentical
+         * Get attributes type of the JSX opening-like element. The result is from resolving "attributes" property of the opening-like element.
+         *
+         * @param openingLikeElement a JSX opening-like element
+         * @param filter a function to remove attributes that will not participate in checking whether attributes are assignable
+         * @return an anonymous type (similar to the one returned by checkObjectLiteral) in which its properties are attributes property.
+         * @remarks Because this function calls getSpreadType, it needs to use the same checks as checkObjectLiteral,
+         * which also calls getSpreadType.
          */
-        function compareSignaturesRelated(source, target, ignoreReturnTypes, reportErrors, errorReporter, compareTypes) {
-            // TODO (drosen): De-duplicate code between related functions.
-            if (source === target) {
-                return -1 /* True */;
-            }
-            if (!target.hasRestParameter && source.minArgumentCount > target.parameters.length) {
-                return 0 /* False */;
-            }
-            // Spec 1.0 Section 3.8.3 & 3.8.4:
-            // M and N (the signatures) are instantiated using type Any as the type argument for all type parameters declared by M and N
-            source = getErasedSignature(source);
-            target = getErasedSignature(target);
-            var result = -1 /* True */;
-            var sourceThisType = getThisTypeOfSignature(source);
-            if (sourceThisType && sourceThisType !== voidType) {
-                var targetThisType = getThisTypeOfSignature(target);
-                if (targetThisType) {
-                    // void sources are assignable to anything.
-                    var related = compareTypes(sourceThisType, targetThisType, /*reportErrors*/ false)
-                        || compareTypes(targetThisType, sourceThisType, reportErrors);
-                    if (!related) {
-                        if (reportErrors) {
-                            errorReporter(ts.Diagnostics.The_this_types_of_each_signature_are_incompatible);
-                        }
-                        return 0 /* False */;
+        function createJsxAttributesTypeFromAttributesProperty(openingLikeElement, filter, checkMode) {
+            var attributes = openingLikeElement.attributes;
+            var attributesTable = ts.createMap();
+            var spread = emptyObjectType;
+            var attributesArray = [];
+            var hasSpreadAnyType = false;
+            var typeToIntersect;
+            var explicitlySpecifyChildrenAttribute = false;
+            var jsxChildrenPropertyName = getJsxElementChildrenPropertyname();
+            for (var _i = 0, _a = attributes.properties; _i < _a.length; _i++) {
+                var attributeDecl = _a[_i];
+                var member = attributeDecl.symbol;
+                if (ts.isJsxAttribute(attributeDecl)) {
+                    var exprType = attributeDecl.initializer ?
+                        checkExpression(attributeDecl.initializer, checkMode) :
+                        trueType; // <Elem attr /> is sugar for <Elem attr={true} />
+                    var attributeSymbol = createSymbol(4 /* Property */ | 134217728 /* Transient */ | member.flags, member.name);
+                    attributeSymbol.declarations = member.declarations;
+                    attributeSymbol.parent = member.parent;
+                    if (member.valueDeclaration) {
+                        attributeSymbol.valueDeclaration = member.valueDeclaration;
+                    }
+                    attributeSymbol.type = exprType;
+                    attributeSymbol.target = member;
+                    attributesTable.set(attributeSymbol.name, attributeSymbol);
+                    attributesArray.push(attributeSymbol);
+                    if (attributeDecl.name.text === jsxChildrenPropertyName) {
+                        explicitlySpecifyChildrenAttribute = true;
                     }
-                    result &= related;
                 }
-            }
-            var sourceMax = getNumNonRestParameters(source);
-            var targetMax = getNumNonRestParameters(target);
-            var checkCount = getNumParametersToCheckForSignatureRelatability(source, sourceMax, target, targetMax);
-            var sourceParams = source.parameters;
-            var targetParams = target.parameters;
-            for (var i = 0; i < checkCount; i++) {
-                var s = i < sourceMax ? getTypeOfParameter(sourceParams[i]) : getRestTypeOfSignature(source);
-                var t = i < targetMax ? getTypeOfParameter(targetParams[i]) : getRestTypeOfSignature(target);
-                var related = compareTypes(s, t, /*reportErrors*/ false) || compareTypes(t, s, reportErrors);
-                if (!related) {
-                    if (reportErrors) {
-                        errorReporter(ts.Diagnostics.Types_of_parameters_0_and_1_are_incompatible, sourceParams[i < sourceMax ? i : sourceMax].name, targetParams[i < targetMax ? i : targetMax].name);
+                else {
+                    ts.Debug.assert(attributeDecl.kind === 255 /* JsxSpreadAttribute */);
+                    if (attributesArray.length > 0) {
+                        spread = getSpreadType(spread, createJsxAttributesType(attributes.symbol, attributesTable));
+                        attributesArray = [];
+                        attributesTable = ts.createMap();
+                    }
+                    var exprType = checkExpression(attributeDecl.expression);
+                    if (isTypeAny(exprType)) {
+                        hasSpreadAnyType = true;
+                    }
+                    if (isValidSpreadType(exprType)) {
+                        spread = getSpreadType(spread, exprType);
+                    }
+                    else {
+                        typeToIntersect = typeToIntersect ? getIntersectionType([typeToIntersect, exprType]) : exprType;
                     }
-                    return 0 /* False */;
                 }
-                result &= related;
             }
-            if (!ignoreReturnTypes) {
-                var targetReturnType = getReturnTypeOfSignature(target);
-                if (targetReturnType === voidType) {
-                    return result;
-                }
-                var sourceReturnType = getReturnTypeOfSignature(source);
-                // The following block preserves behavior forbidding boolean returning functions from being assignable to type guard returning functions
-                if (target.typePredicate) {
-                    if (source.typePredicate) {
-                        result &= compareTypePredicateRelatedTo(source.typePredicate, target.typePredicate, reportErrors, errorReporter, compareTypes);
-                    }
-                    else if (ts.isIdentifierTypePredicate(target.typePredicate)) {
-                        if (reportErrors) {
-                            errorReporter(ts.Diagnostics.Signature_0_must_have_a_type_predicate, signatureToString(source));
-                        }
-                        return 0 /* False */;
+            if (!hasSpreadAnyType) {
+                if (spread !== emptyObjectType) {
+                    if (attributesArray.length > 0) {
+                        spread = getSpreadType(spread, createJsxAttributesType(attributes.symbol, attributesTable));
                     }
+                    attributesArray = getPropertiesOfType(spread);
                 }
-                else {
-                    result &= compareTypes(sourceReturnType, targetReturnType, reportErrors);
+                attributesTable = ts.createMap();
+                for (var _b = 0, attributesArray_1 = attributesArray; _b < attributesArray_1.length; _b++) {
+                    var attr = attributesArray_1[_b];
+                    if (!filter || filter(attr)) {
+                        attributesTable.set(attr.name, attr);
+                    }
                 }
             }
-            return result;
-        }
-        function compareTypePredicateRelatedTo(source, target, reportErrors, errorReporter, compareTypes) {
-            if (source.kind !== target.kind) {
-                if (reportErrors) {
-                    errorReporter(ts.Diagnostics.A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard);
-                    errorReporter(ts.Diagnostics.Type_predicate_0_is_not_assignable_to_1, typePredicateToString(source), typePredicateToString(target));
+            // Handle children attribute
+            var parent = openingLikeElement.parent.kind === 249 /* JsxElement */ ? openingLikeElement.parent : undefined;
+            // We have to check that openingElement of the parent is the one we are visiting as this may not be true for selfClosingElement
+            if (parent && parent.openingElement === openingLikeElement && parent.children.length > 0) {
+                var childrenTypes = [];
+                for (var _c = 0, _d = parent.children; _c < _d.length; _c++) {
+                    var child = _d[_c];
+                    // In React, JSX text that contains only whitespaces will be ignored so we don't want to type-check that
+                    // because then type of children property will have constituent of string type.
+                    if (child.kind === 10 /* JsxText */) {
+                        if (!child.containsOnlyWhiteSpaces) {
+                            childrenTypes.push(stringType);
+                        }
+                    }
+                    else {
+                        childrenTypes.push(checkExpression(child, checkMode));
+                    }
                 }
-                return 0 /* False */;
-            }
-            if (source.kind === 1 /* Identifier */) {
-                var sourceIdentifierPredicate = source;
-                var targetIdentifierPredicate = target;
-                if (sourceIdentifierPredicate.parameterIndex !== targetIdentifierPredicate.parameterIndex) {
-                    if (reportErrors) {
-                        errorReporter(ts.Diagnostics.Parameter_0_is_not_in_the_same_position_as_parameter_1, sourceIdentifierPredicate.parameterName, targetIdentifierPredicate.parameterName);
-                        errorReporter(ts.Diagnostics.Type_predicate_0_is_not_assignable_to_1, typePredicateToString(source), typePredicateToString(target));
+                if (!hasSpreadAnyType && jsxChildrenPropertyName && jsxChildrenPropertyName !== "") {
+                    // Error if there is a attribute named "children" explicitly specified and children element.
+                    // This is because children element will overwrite the value from attributes.
+                    // Note: we will not warn "children" attribute overwritten if "children" attribute is specified in object spread.
+                    if (explicitlySpecifyChildrenAttribute) {
+                        error(attributes, ts.Diagnostics._0_are_specified_twice_The_attribute_named_0_will_be_overwritten, jsxChildrenPropertyName);
                     }
-                    return 0 /* False */;
+                    // If there are children in the body of JSX element, create dummy attribute "children" with anyType so that it will pass the attribute checking process
+                    var childrenPropSymbol = createSymbol(4 /* Property */ | 134217728 /* Transient */, jsxChildrenPropertyName);
+                    childrenPropSymbol.type = childrenTypes.length === 1 ?
+                        childrenTypes[0] :
+                        createArrayType(getUnionType(childrenTypes, /*subtypeReduction*/ false));
+                    attributesTable.set(jsxChildrenPropertyName, childrenPropSymbol);
                 }
             }
-            var related = compareTypes(source.type, target.type, reportErrors);
-            if (related === 0 /* False */ && reportErrors) {
-                errorReporter(ts.Diagnostics.Type_predicate_0_is_not_assignable_to_1, typePredicateToString(source), typePredicateToString(target));
+            if (hasSpreadAnyType) {
+                return anyType;
             }
-            return related;
-        }
-        function isImplementationCompatibleWithOverload(implementation, overload) {
-            var erasedSource = getErasedSignature(implementation);
-            var erasedTarget = getErasedSignature(overload);
-            // First see if the return types are compatible in either direction.
-            var sourceReturnType = getReturnTypeOfSignature(erasedSource);
-            var targetReturnType = getReturnTypeOfSignature(erasedTarget);
-            if (targetReturnType === voidType
-                || isTypeRelatedTo(targetReturnType, sourceReturnType, assignableRelation)
-                || isTypeRelatedTo(sourceReturnType, targetReturnType, assignableRelation)) {
-                return isSignatureAssignableTo(erasedSource, erasedTarget, /*ignoreReturnTypes*/ true);
+            var attributeType = createJsxAttributesType(attributes.symbol, attributesTable);
+            return typeToIntersect && attributesTable.size ? getIntersectionType([typeToIntersect, attributeType]) :
+                typeToIntersect ? typeToIntersect : attributeType;
+            /**
+             * Create anonymous type from given attributes symbol table.
+             * @param symbol a symbol of JsxAttributes containing attributes corresponding to attributesTable
+             * @param attributesTable a symbol table of attributes property
+             */
+            function createJsxAttributesType(symbol, attributesTable) {
+                var result = createAnonymousType(symbol, attributesTable, emptyArray, emptyArray, /*stringIndexInfo*/ undefined, /*numberIndexInfo*/ undefined);
+                result.flags |= 33554432 /* JsxAttributes */ | 4194304 /* ContainsObjectLiteral */;
+                result.objectFlags |= 128 /* ObjectLiteral */;
+                return result;
             }
-            return false;
         }
-        function getNumNonRestParameters(signature) {
-            var numParams = signature.parameters.length;
-            return signature.hasRestParameter ?
-                numParams - 1 :
-                numParams;
+        /**
+         * Check attributes property of opening-like element. This function is called during chooseOverload to get call signature of a JSX opening-like element.
+         * (See "checkApplicableSignatureForJsxOpeningLikeElement" for how the function is used)
+         * @param node a JSXAttributes to be resolved of its type
+         */
+        function checkJsxAttributes(node, checkMode) {
+            return createJsxAttributesTypeFromAttributesProperty(node.parent, /*filter*/ undefined, checkMode);
         }
-        function getNumParametersToCheckForSignatureRelatability(source, sourceNonRestParamCount, target, targetNonRestParamCount) {
-            if (source.hasRestParameter === target.hasRestParameter) {
-                if (source.hasRestParameter) {
-                    // If both have rest parameters, get the max and add 1 to
-                    // compensate for the rest parameter.
-                    return Math.max(sourceNonRestParamCount, targetNonRestParamCount) + 1;
+        function getJsxType(name) {
+            var jsxType = jsxTypes.get(name);
+            if (jsxType === undefined) {
+                jsxTypes.set(name, jsxType = getExportedTypeFromNamespace(JsxNames.JSX, name) || unknownType);
+            }
+            return jsxType;
+        }
+        /**
+         * Looks up an intrinsic tag name and returns a symbol that either points to an intrinsic
+         * property (in which case nodeLinks.jsxFlags will be IntrinsicNamedElement) or an intrinsic
+         * string index signature (in which case nodeLinks.jsxFlags will be IntrinsicIndexedElement).
+         * May also return unknownSymbol if both of these lookups fail.
+         */
+        function getIntrinsicTagSymbol(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedSymbol) {
+                var intrinsicElementsType = getJsxType(JsxNames.IntrinsicElements);
+                if (intrinsicElementsType !== unknownType) {
+                    // Property case
+                    var intrinsicProp = getPropertyOfType(intrinsicElementsType, node.tagName.text);
+                    if (intrinsicProp) {
+                        links.jsxFlags |= 1 /* IntrinsicNamedElement */;
+                        return links.resolvedSymbol = intrinsicProp;
+                    }
+                    // Intrinsic string indexer case
+                    var indexSignatureType = getIndexTypeOfType(intrinsicElementsType, 0 /* String */);
+                    if (indexSignatureType) {
+                        links.jsxFlags |= 2 /* IntrinsicIndexedElement */;
+                        return links.resolvedSymbol = intrinsicElementsType.symbol;
+                    }
+                    // Wasn't found
+                    error(node, ts.Diagnostics.Property_0_does_not_exist_on_type_1, node.tagName.text, "JSX." + JsxNames.IntrinsicElements);
+                    return links.resolvedSymbol = unknownSymbol;
                 }
                 else {
-                    return Math.min(sourceNonRestParamCount, targetNonRestParamCount);
+                    if (noImplicitAny) {
+                        error(node, ts.Diagnostics.JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists, JsxNames.IntrinsicElements);
+                    }
+                    return links.resolvedSymbol = unknownSymbol;
                 }
             }
-            else {
-                // Return the count for whichever signature doesn't have rest parameters.
-                return source.hasRestParameter ?
-                    targetNonRestParamCount :
-                    sourceNonRestParamCount;
-            }
+            return links.resolvedSymbol;
         }
-        function isEnumTypeRelatedTo(source, target, errorReporter) {
-            if (source === target) {
-                return true;
-            }
-            var id = source.id + "," + target.id;
-            if (enumRelation[id] !== undefined) {
-                return enumRelation[id];
+        /**
+         * Given a JSX element that is a class element, finds the Element Instance Type. If the
+         * element is not a class element, or the class element type cannot be determined, returns 'undefined'.
+         * For example, in the element <MyClass>, the element instance type is `MyClass` (not `typeof MyClass`).
+         */
+        function getJsxElementInstanceType(node, valueType) {
+            ts.Debug.assert(!(valueType.flags & 65536 /* Union */));
+            if (isTypeAny(valueType)) {
+                // Short-circuit if the class tag is using an element type 'any'
+                return anyType;
             }
-            if (source.symbol.name !== target.symbol.name ||
-                !(source.symbol.flags & 256 /* RegularEnum */) || !(target.symbol.flags & 256 /* RegularEnum */) ||
-                (source.flags & 524288 /* Union */) !== (target.flags & 524288 /* Union */)) {
-                return enumRelation[id] = false;
+            // Resolve the signatures, preferring constructor
+            var signatures = getSignaturesOfType(valueType, 1 /* Construct */);
+            if (signatures.length === 0) {
+                // No construct signatures, try call signatures
+                signatures = getSignaturesOfType(valueType, 0 /* Call */);
+                if (signatures.length === 0) {
+                    // We found no signatures at all, which is an error
+                    error(node.tagName, ts.Diagnostics.JSX_element_type_0_does_not_have_any_construct_or_call_signatures, ts.getTextOfNode(node.tagName));
+                    return unknownType;
+                }
             }
-            var targetEnumType = getTypeOfSymbol(target.symbol);
-            for (var _i = 0, _a = getPropertiesOfType(getTypeOfSymbol(source.symbol)); _i < _a.length; _i++) {
-                var property = _a[_i];
-                if (property.flags & 8 /* EnumMember */) {
-                    var targetProperty = getPropertyOfType(targetEnumType, property.name);
-                    if (!targetProperty || !(targetProperty.flags & 8 /* EnumMember */)) {
-                        if (errorReporter) {
-                            errorReporter(ts.Diagnostics.Property_0_is_missing_in_type_1, property.name, typeToString(target, /*enclosingDeclaration*/ undefined, 128 /* UseFullyQualifiedType */));
-                        }
-                        return enumRelation[id] = false;
-                    }
+            var instantiatedSignatures = [];
+            for (var _i = 0, signatures_3 = signatures; _i < signatures_3.length; _i++) {
+                var signature = signatures_3[_i];
+                if (signature.typeParameters) {
+                    var typeArguments = fillMissingTypeArguments(/*typeArguments*/ undefined, signature.typeParameters, /*minTypeArgumentCount*/ 0);
+                    instantiatedSignatures.push(getSignatureInstantiation(signature, typeArguments));
+                }
+                else {
+                    instantiatedSignatures.push(signature);
                 }
             }
-            return enumRelation[id] = true;
+            return getUnionType(ts.map(instantiatedSignatures, getReturnTypeOfSignature), /*subtypeReduction*/ true);
         }
-        function isSimpleTypeRelatedTo(source, target, relation, errorReporter) {
-            if (target.flags & 8192 /* Never */)
-                return false;
-            if (target.flags & 1 /* Any */ || source.flags & 8192 /* Never */)
-                return true;
-            if (source.flags & 34 /* StringLike */ && target.flags & 2 /* String */)
-                return true;
-            if (source.flags & 340 /* NumberLike */ && target.flags & 4 /* Number */)
-                return true;
-            if (source.flags & 136 /* BooleanLike */ && target.flags & 8 /* Boolean */)
-                return true;
-            if (source.flags & 256 /* EnumLiteral */ && target.flags & 16 /* Enum */ && source.baseType === target)
-                return true;
-            if (source.flags & 16 /* Enum */ && target.flags & 16 /* Enum */ && isEnumTypeRelatedTo(source, target, errorReporter))
-                return true;
-            if (source.flags & 2048 /* Undefined */ && (!strictNullChecks || target.flags & (2048 /* Undefined */ | 1024 /* Void */)))
-                return true;
-            if (source.flags & 4096 /* Null */ && (!strictNullChecks || target.flags & 4096 /* Null */))
-                return true;
-            if (relation === assignableRelation || relation === comparableRelation) {
-                if (source.flags & 1 /* Any */)
-                    return true;
-                if ((source.flags & 4 /* Number */ | source.flags & 64 /* NumberLiteral */) && target.flags & 272 /* EnumLike */)
-                    return true;
-                if (source.flags & 256 /* EnumLiteral */ &&
-                    target.flags & 256 /* EnumLiteral */ &&
-                    source.text === target.text &&
-                    isEnumTypeRelatedTo(source.baseType, target.baseType, errorReporter)) {
-                    return true;
+        /**
+         * Look into JSX namespace and then look for container with matching name as nameOfAttribPropContainer.
+         * Get a single property from that container if existed. Report an error if there are more than one property.
+         *
+         * @param nameOfAttribPropContainer a string of value JsxNames.ElementAttributesPropertyNameContainer or JsxNames.ElementChildrenAttributeNameContainer
+         *          if other string is given or the container doesn't exist, return undefined.
+         */
+        function getNameFromJsxElementAttributesContainer(nameOfAttribPropContainer) {
+            // JSX
+            var jsxNamespace = getGlobalSymbol(JsxNames.JSX, 1920 /* Namespace */, /*diagnosticMessage*/ undefined);
+            // JSX.ElementAttributesProperty | JSX.ElementChildrenAttribute [symbol]
+            var jsxElementAttribPropInterfaceSym = jsxNamespace && getSymbol(jsxNamespace.exports, nameOfAttribPropContainer, 793064 /* Type */);
+            // JSX.ElementAttributesProperty | JSX.ElementChildrenAttribute [type]
+            var jsxElementAttribPropInterfaceType = jsxElementAttribPropInterfaceSym && getDeclaredTypeOfSymbol(jsxElementAttribPropInterfaceSym);
+            // The properties of JSX.ElementAttributesProperty | JSX.ElementChildrenAttribute
+            var propertiesOfJsxElementAttribPropInterface = jsxElementAttribPropInterfaceType && getPropertiesOfType(jsxElementAttribPropInterfaceType);
+            if (propertiesOfJsxElementAttribPropInterface) {
+                // Element Attributes has zero properties, so the element attributes type will be the class instance type
+                if (propertiesOfJsxElementAttribPropInterface.length === 0) {
+                    return "";
                 }
-                if (source.flags & 256 /* EnumLiteral */ &&
-                    target.flags & 16 /* Enum */ &&
-                    isEnumTypeRelatedTo(target, source.baseType, errorReporter)) {
-                    return true;
+                else if (propertiesOfJsxElementAttribPropInterface.length === 1) {
+                    return propertiesOfJsxElementAttribPropInterface[0].name;
+                }
+                else if (propertiesOfJsxElementAttribPropInterface.length > 1) {
+                    // More than one property on ElementAttributesProperty is an error
+                    error(jsxElementAttribPropInterfaceSym.declarations[0], ts.Diagnostics.The_global_type_JSX_0_may_not_have_more_than_one_property, nameOfAttribPropContainer);
                 }
             }
-            return false;
+            return undefined;
         }
-        function isTypeRelatedTo(source, target, relation) {
-            if (source.flags & 96 /* StringOrNumberLiteral */ && source.flags & 16777216 /* FreshLiteral */) {
-                source = source.regularType;
+        /// e.g. "props" for React.d.ts,
+        /// or 'undefined' if ElementAttributesProperty doesn't exist (which means all
+        ///     non-intrinsic elements' attributes type is 'any'),
+        /// or '' if it has 0 properties (which means every
+        ///     non-intrinsic elements' attributes type is the element instance type)
+        function getJsxElementPropertiesName() {
+            if (!_hasComputedJsxElementPropertiesName) {
+                _hasComputedJsxElementPropertiesName = true;
+                _jsxElementPropertiesName = getNameFromJsxElementAttributesContainer(JsxNames.ElementAttributesPropertyNameContainer);
             }
-            if (target.flags & 96 /* StringOrNumberLiteral */ && target.flags & 16777216 /* FreshLiteral */) {
-                target = target.regularType;
+            return _jsxElementPropertiesName;
+        }
+        function getJsxElementChildrenPropertyname() {
+            if (!_hasComputedJsxElementChildrenPropertyName) {
+                _hasComputedJsxElementChildrenPropertyName = true;
+                _jsxElementChildrenPropertyName = getNameFromJsxElementAttributesContainer(JsxNames.ElementChildrenAttributeNameContainer);
             }
-            if (source === target || relation !== identityRelation && isSimpleTypeRelatedTo(source, target, relation)) {
-                return true;
+            return _jsxElementChildrenPropertyName;
+        }
+        function getApparentTypeOfJsxPropsType(propsType) {
+            if (!propsType) {
+                return undefined;
             }
-            if (source.flags & 2588672 /* ObjectType */ && target.flags & 2588672 /* ObjectType */) {
-                var id = relation !== identityRelation || source.id < target.id ? source.id + "," + target.id : target.id + "," + source.id;
-                var related = relation[id];
-                if (related !== undefined) {
-                    return related === 1 /* Succeeded */;
+            if (propsType.flags & 131072 /* Intersection */) {
+                var propsApparentType = [];
+                for (var _i = 0, _a = propsType.types; _i < _a.length; _i++) {
+                    var t = _a[_i];
+                    propsApparentType.push(getApparentType(t));
                 }
+                return getIntersectionType(propsApparentType);
             }
-            if (source.flags & 4177920 /* StructuredOrTypeParameter */ || target.flags & 4177920 /* StructuredOrTypeParameter */) {
-                return checkTypeRelatedTo(source, target, relation, undefined, undefined, undefined);
-            }
-            return false;
+            return getApparentType(propsType);
         }
         /**
-         * Checks if 'source' is related to 'target' (e.g.: is a assignable to).
-         * @param source The left-hand-side of the relation.
-         * @param target The right-hand-side of the relation.
-         * @param relation The relation considered. One of 'identityRelation', 'subtypeRelation', 'assignableRelation', or 'comparableRelation'.
-         * Used as both to determine which checks are performed and as a cache of previously computed results.
-         * @param errorNode The suggested node upon which all errors will be reported, if defined. This may or may not be the actual node used.
-         * @param headMessage If the error chain should be prepended by a head message, then headMessage will be used.
-         * @param containingMessageChain A chain of errors to prepend any new errors found.
+         * Get JSX attributes type by trying to resolve openingLikeElement as a stateless function component.
+         * Return only attributes type of successfully resolved call signature.
+         * This function assumes that the caller handled other possible element type of the JSX element (e.g. stateful component)
+         * Unlike tryGetAllJsxStatelessFunctionAttributesType, this function is a default behavior of type-checkers.
+         * @param openingLikeElement a JSX opening-like element to find attributes type
+         * @param elementType a type of the opening-like element. This elementType can't be an union type
+         * @param elemInstanceType an element instance type (the result of newing or invoking this tag)
+         * @param elementClassType a JSX-ElementClass type. This is a result of looking up ElementClass interface in the JSX global
          */
-        function checkTypeRelatedTo(source, target, relation, errorNode, headMessage, containingMessageChain) {
-            var errorInfo;
-            var sourceStack;
-            var targetStack;
-            var maybeStack;
-            var expandingFlags;
-            var depth = 0;
-            var overflow = false;
-            ts.Debug.assert(relation !== identityRelation || !errorNode, "no error reporting in identity checking");
-            var result = isRelatedTo(source, target, /*reportErrors*/ !!errorNode, headMessage);
-            if (overflow) {
-                error(errorNode, ts.Diagnostics.Excessive_stack_depth_comparing_types_0_and_1, typeToString(source), typeToString(target));
+        function defaultTryGetJsxStatelessFunctionAttributesType(openingLikeElement, elementType, elemInstanceType, elementClassType) {
+            ts.Debug.assert(!(elementType.flags & 65536 /* Union */));
+            if (!elementClassType || !isTypeAssignableTo(elemInstanceType, elementClassType)) {
+                var jsxStatelessElementType = getJsxGlobalStatelessElementType();
+                if (jsxStatelessElementType) {
+                    // We don't call getResolvedSignature here because we have already resolve the type of JSX Element.
+                    var callSignature = getResolvedJsxStatelessFunctionSignature(openingLikeElement, elementType, /*candidatesOutArray*/ undefined);
+                    if (callSignature !== unknownSignature) {
+                        var callReturnType = callSignature && getReturnTypeOfSignature(callSignature);
+                        var paramType = callReturnType && (callSignature.parameters.length === 0 ? emptyObjectType : getTypeOfSymbol(callSignature.parameters[0]));
+                        paramType = getApparentTypeOfJsxPropsType(paramType);
+                        if (callReturnType && isTypeAssignableTo(callReturnType, jsxStatelessElementType)) {
+                            // Intersect in JSX.IntrinsicAttributes if it exists
+                            var intrinsicAttributes = getJsxType(JsxNames.IntrinsicAttributes);
+                            if (intrinsicAttributes !== unknownType) {
+                                paramType = intersectTypes(intrinsicAttributes, paramType);
+                            }
+                            return paramType;
+                        }
+                    }
+                }
             }
-            else if (errorInfo) {
-                if (containingMessageChain) {
-                    errorInfo = ts.concatenateDiagnosticMessageChains(containingMessageChain, errorInfo);
+            return undefined;
+        }
+        /**
+         * Get JSX attributes type by trying to resolve openingLikeElement as a stateless function component.
+         * Return all attributes type of resolved call signature including candidate signatures.
+         * This function assumes that the caller handled other possible element type of the JSX element.
+         * This function is a behavior used by language service when looking up completion in JSX element.
+         * @param openingLikeElement a JSX opening-like element to find attributes type
+         * @param elementType a type of the opening-like element. This elementType can't be an union type
+         * @param elemInstanceType an element instance type (the result of newing or invoking this tag)
+         * @param elementClassType a JSX-ElementClass type. This is a result of looking up ElementClass interface in the JSX global
+         */
+        function tryGetAllJsxStatelessFunctionAttributesType(openingLikeElement, elementType, elemInstanceType, elementClassType) {
+            ts.Debug.assert(!(elementType.flags & 65536 /* Union */));
+            if (!elementClassType || !isTypeAssignableTo(elemInstanceType, elementClassType)) {
+                // Is this is a stateless function component? See if its single signature's return type is assignable to the JSX Element Type
+                var jsxStatelessElementType = getJsxGlobalStatelessElementType();
+                if (jsxStatelessElementType) {
+                    // We don't call getResolvedSignature because here we have already resolve the type of JSX Element.
+                    var candidatesOutArray = [];
+                    getResolvedJsxStatelessFunctionSignature(openingLikeElement, elementType, candidatesOutArray);
+                    var result = void 0;
+                    var allMatchingAttributesType = void 0;
+                    for (var _i = 0, candidatesOutArray_1 = candidatesOutArray; _i < candidatesOutArray_1.length; _i++) {
+                        var candidate = candidatesOutArray_1[_i];
+                        var callReturnType = getReturnTypeOfSignature(candidate);
+                        var paramType = callReturnType && (candidate.parameters.length === 0 ? emptyObjectType : getTypeOfSymbol(candidate.parameters[0]));
+                        paramType = getApparentTypeOfJsxPropsType(paramType);
+                        if (callReturnType && isTypeAssignableTo(callReturnType, jsxStatelessElementType)) {
+                            var shouldBeCandidate = true;
+                            for (var _a = 0, _b = openingLikeElement.attributes.properties; _a < _b.length; _a++) {
+                                var attribute = _b[_a];
+                                if (ts.isJsxAttribute(attribute) &&
+                                    isUnhyphenatedJsxName(attribute.name.text) &&
+                                    !getPropertyOfType(paramType, attribute.name.text)) {
+                                    shouldBeCandidate = false;
+                                    break;
+                                }
+                            }
+                            if (shouldBeCandidate) {
+                                result = intersectTypes(result, paramType);
+                            }
+                            allMatchingAttributesType = intersectTypes(allMatchingAttributesType, paramType);
+                        }
+                    }
+                    // If we can't find any matching, just return everything.
+                    if (!result) {
+                        result = allMatchingAttributesType;
+                    }
+                    // Intersect in JSX.IntrinsicAttributes if it exists
+                    var intrinsicAttributes = getJsxType(JsxNames.IntrinsicAttributes);
+                    if (intrinsicAttributes !== unknownType) {
+                        result = intersectTypes(intrinsicAttributes, result);
+                    }
+                    return result;
                 }
-                diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(errorNode, errorInfo));
             }
-            return result !== 0 /* False */;
-            function reportError(message, arg0, arg1, arg2) {
-                ts.Debug.assert(!!errorNode);
-                errorInfo = ts.chainDiagnosticMessages(errorInfo, message, arg0, arg1, arg2);
+            return undefined;
+        }
+        /**
+         * Resolve attributes type of the given opening-like element. The attributes type is a type of attributes associated with the given elementType.
+         * For instance:
+         *      declare function Foo(attr: { p1: string}): JSX.Element;
+         *      <Foo p1={10} />;  // This function will try resolve "Foo" and return an attributes type of "Foo" which is "{ p1: string }"
+         *
+         * The function is intended to initially be called from getAttributesTypeFromJsxOpeningLikeElement which already handle JSX-intrinsic-element..
+         * This function will try to resolve custom JSX attributes type in following order: string literal, stateless function, and stateful component
+         *
+         * @param openingLikeElement a non-intrinsic JSXOPeningLikeElement
+         * @param shouldIncludeAllStatelessAttributesType a boolean indicating whether to include all attributes types from all stateless function signature
+         * @param elementType an instance type of the given opening-like element. If undefined, the function will check type openinglikeElement's tagname.
+         * @param elementClassType a JSX-ElementClass type. This is a result of looking up ElementClass interface in the JSX global (imported from react.d.ts)
+         * @return attributes type if able to resolve the type of node
+         *         anyType if there is no type ElementAttributesProperty or there is an error
+         *         emptyObjectType if there is no "prop" in the element instance type
+         */
+        function resolveCustomJsxElementAttributesType(openingLikeElement, shouldIncludeAllStatelessAttributesType, elementType, elementClassType) {
+            if (!elementType) {
+                elementType = checkExpression(openingLikeElement.tagName);
             }
-            function reportRelationError(message, source, target) {
-                var sourceType = typeToString(source);
-                var targetType = typeToString(target);
-                if (sourceType === targetType) {
-                    sourceType = typeToString(source, /*enclosingDeclaration*/ undefined, 128 /* UseFullyQualifiedType */);
-                    targetType = typeToString(target, /*enclosingDeclaration*/ undefined, 128 /* UseFullyQualifiedType */);
-                }
-                if (!message) {
-                    message = relation === comparableRelation ?
-                        ts.Diagnostics.Type_0_is_not_comparable_to_type_1 :
-                        ts.Diagnostics.Type_0_is_not_assignable_to_type_1;
-                }
-                reportError(message, sourceType, targetType);
+            if (elementType.flags & 65536 /* Union */) {
+                var types = elementType.types;
+                return getUnionType(types.map(function (type) {
+                    return resolveCustomJsxElementAttributesType(openingLikeElement, shouldIncludeAllStatelessAttributesType, type, elementClassType);
+                }), /*subtypeReduction*/ true);
             }
-            function tryElaborateErrorsForPrimitivesAndObjects(source, target) {
-                var sourceType = typeToString(source);
-                var targetType = typeToString(target);
-                if ((globalStringType === source && stringType === target) ||
-                    (globalNumberType === source && numberType === target) ||
-                    (globalBooleanType === source && booleanType === target) ||
-                    (getGlobalESSymbolType() === source && esSymbolType === target)) {
-                    reportError(ts.Diagnostics._0_is_a_primitive_but_1_is_a_wrapper_object_Prefer_using_0_when_possible, targetType, sourceType);
-                }
+            // If the elemType is a string type, we have to return anyType to prevent an error downstream as we will try to find construct or call signature of the type
+            if (elementType.flags & 2 /* String */) {
+                return anyType;
             }
-            // Compare two types and return
-            // Ternary.True if they are related with no assumptions,
-            // Ternary.Maybe if they are related with assumptions of other relationships, or
-            // Ternary.False if they are not related.
-            function isRelatedTo(source, target, reportErrors, headMessage) {
-                var result;
-                if (source.flags & 96 /* StringOrNumberLiteral */ && source.flags & 16777216 /* FreshLiteral */) {
-                    source = source.regularType;
-                }
-                if (target.flags & 96 /* StringOrNumberLiteral */ && target.flags & 16777216 /* FreshLiteral */) {
-                    target = target.regularType;
-                }
-                // both types are the same - covers 'they are the same primitive type or both are Any' or the same type parameter cases
-                if (source === target)
-                    return -1 /* True */;
-                if (relation === identityRelation) {
-                    return isIdenticalTo(source, target);
-                }
-                if (isSimpleTypeRelatedTo(source, target, relation, reportErrors ? reportError : undefined))
-                    return -1 /* True */;
-                if (source.flags & 8388608 /* ObjectLiteral */ && source.flags & 16777216 /* FreshLiteral */) {
-                    if (hasExcessProperties(source, target, reportErrors)) {
-                        if (reportErrors) {
-                            reportRelationError(headMessage, source, target);
-                        }
-                        return 0 /* False */;
+            else if (elementType.flags & 32 /* StringLiteral */) {
+                // If the elemType is a stringLiteral type, we can then provide a check to make sure that the string literal type is one of the Jsx intrinsic element type
+                // For example:
+                //      var CustomTag: "h1" = "h1";
+                //      <CustomTag> Hello World </CustomTag>
+                var intrinsicElementsType = getJsxType(JsxNames.IntrinsicElements);
+                if (intrinsicElementsType !== unknownType) {
+                    var stringLiteralTypeName = elementType.value;
+                    var intrinsicProp = getPropertyOfType(intrinsicElementsType, stringLiteralTypeName);
+                    if (intrinsicProp) {
+                        return getTypeOfSymbol(intrinsicProp);
                     }
-                    // Above we check for excess properties with respect to the entire target type. When union
-                    // and intersection types are further deconstructed on the target side, we don't want to
-                    // make the check again (as it might fail for a partial target type). Therefore we obtain
-                    // the regular source type and proceed with that.
-                    if (target.flags & 1572864 /* UnionOrIntersection */) {
-                        source = getRegularTypeOfObjectLiteral(source);
+                    var indexSignatureType = getIndexTypeOfType(intrinsicElementsType, 0 /* String */);
+                    if (indexSignatureType) {
+                        return indexSignatureType;
                     }
+                    error(openingLikeElement, ts.Diagnostics.Property_0_does_not_exist_on_type_1, stringLiteralTypeName, "JSX." + JsxNames.IntrinsicElements);
                 }
-                var saveErrorInfo = errorInfo;
-                // Note that these checks are specifically ordered to produce correct results.
-                if (source.flags & 524288 /* Union */) {
-                    if (relation === comparableRelation) {
-                        result = someTypeRelatedToType(source, target, reportErrors && !(source.flags & 8190 /* Primitive */));
-                    }
-                    else {
-                        result = eachTypeRelatedToType(source, target, reportErrors && !(source.flags & 8190 /* Primitive */));
-                    }
-                    if (result) {
-                        return result;
-                    }
+                // If we need to report an error, we already done so here. So just return any to prevent any more error downstream
+                return anyType;
+            }
+            // Get the element instance type (the result of newing or invoking this tag)
+            var elemInstanceType = getJsxElementInstanceType(openingLikeElement, elementType);
+            // If we should include all stateless attributes type, then get all attributes type from all stateless function signature.
+            // Otherwise get only attributes type from the signature picked by choose-overload logic.
+            var statelessAttributesType = shouldIncludeAllStatelessAttributesType ?
+                tryGetAllJsxStatelessFunctionAttributesType(openingLikeElement, elementType, elemInstanceType, elementClassType) :
+                defaultTryGetJsxStatelessFunctionAttributesType(openingLikeElement, elementType, elemInstanceType, elementClassType);
+            if (statelessAttributesType) {
+                return statelessAttributesType;
+            }
+            // Issue an error if this return type isn't assignable to JSX.ElementClass
+            if (elementClassType) {
+                checkTypeRelatedTo(elemInstanceType, elementClassType, assignableRelation, openingLikeElement, ts.Diagnostics.JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements);
+            }
+            if (isTypeAny(elemInstanceType)) {
+                return elemInstanceType;
+            }
+            var propsName = getJsxElementPropertiesName();
+            if (propsName === undefined) {
+                // There is no type ElementAttributesProperty, return 'any'
+                return anyType;
+            }
+            else if (propsName === "") {
+                // If there is no e.g. 'props' member in ElementAttributesProperty, use the element class type instead
+                return elemInstanceType;
+            }
+            else {
+                var attributesType = getTypeOfPropertyOfType(elemInstanceType, propsName);
+                if (!attributesType) {
+                    // There is no property named 'props' on this instance type
+                    return emptyObjectType;
                 }
-                else if (target.flags & 1048576 /* Intersection */) {
-                    result = typeRelatedToEachType(source, target, reportErrors);
-                    if (result) {
-                        return result;
-                    }
+                else if (isTypeAny(attributesType) || (attributesType === unknownType)) {
+                    // Props is of type 'any' or unknown
+                    return attributesType;
                 }
                 else {
-                    // It is necessary to try these "some" checks on both sides because there may be nested "each" checks
-                    // on either side that need to be prioritized. For example, A | B = (A | B) & (C | D) or
-                    // A & B = (A & B) | (C & D).
-                    if (source.flags & 1048576 /* Intersection */) {
-                        // Check to see if any constituents of the intersection are immediately related to the target.
-                        //
-                        // Don't report errors though. Checking whether a constituent is related to the source is not actually
-                        // useful and leads to some confusing error messages. Instead it is better to let the below checks
-                        // take care of this, or to not elaborate at all. For instance,
-                        //
-                        //    - For an object type (such as 'C = A & B'), users are usually more interested in structural errors.
-                        //
-                        //    - For a union type (such as '(A | B) = (C & D)'), it's better to hold onto the whole intersection
-                        //          than to report that 'D' is not assignable to 'A' or 'B'.
-                        //
-                        //    - For a primitive type or type parameter (such as 'number = A & B') there is no point in
-                        //          breaking the intersection apart.
-                        if (result = someTypeRelatedToType(source, target, /*reportErrors*/ false)) {
-                            return result;
+                    // Normal case -- add in IntrinsicClassElements<T> and IntrinsicElements
+                    var apparentAttributesType = attributesType;
+                    var intrinsicClassAttribs = getJsxType(JsxNames.IntrinsicClassAttributes);
+                    if (intrinsicClassAttribs !== unknownType) {
+                        var typeParams = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(intrinsicClassAttribs.symbol);
+                        if (typeParams) {
+                            if (typeParams.length === 1) {
+                                apparentAttributesType = intersectTypes(createTypeReference(intrinsicClassAttribs, [elemInstanceType]), apparentAttributesType);
+                            }
                         }
-                    }
-                    if (target.flags & 524288 /* Union */) {
-                        if (result = typeRelatedToSomeType(source, target, reportErrors && !(source.flags & 8190 /* Primitive */) && !(target.flags & 8190 /* Primitive */))) {
-                            return result;
+                        else {
+                            apparentAttributesType = intersectTypes(attributesType, intrinsicClassAttribs);
                         }
                     }
-                }
-                if (source.flags & 16384 /* TypeParameter */) {
-                    var constraint = getConstraintOfTypeParameter(source);
-                    if (!constraint || constraint.flags & 1 /* Any */) {
-                        constraint = emptyObjectType;
-                    }
-                    // The constraint may need to be further instantiated with its 'this' type.
-                    constraint = getTypeWithThisArgument(constraint, source);
-                    // Report constraint errors only if the constraint is not the empty object type
-                    var reportConstraintErrors = reportErrors && constraint !== emptyObjectType;
-                    if (result = isRelatedTo(constraint, target, reportConstraintErrors)) {
-                        errorInfo = saveErrorInfo;
-                        return result;
+                    var intrinsicAttribs = getJsxType(JsxNames.IntrinsicAttributes);
+                    if (intrinsicAttribs !== unknownType) {
+                        apparentAttributesType = intersectTypes(intrinsicAttribs, apparentAttributesType);
                     }
+                    return apparentAttributesType;
+                }
+            }
+        }
+        /**
+         * Get attributes type of the given intrinsic opening-like Jsx element by resolving the tag name.
+         * The function is intended to be called from a function which has checked that the opening element is an intrinsic element.
+         * @param node an intrinsic JSX opening-like element
+         */
+        function getIntrinsicAttributesTypeFromJsxOpeningLikeElement(node) {
+            ts.Debug.assert(isJsxIntrinsicIdentifier(node.tagName));
+            var links = getNodeLinks(node);
+            if (!links.resolvedJsxElementAttributesType) {
+                var symbol = getIntrinsicTagSymbol(node);
+                if (links.jsxFlags & 1 /* IntrinsicNamedElement */) {
+                    return links.resolvedJsxElementAttributesType = getTypeOfSymbol(symbol);
+                }
+                else if (links.jsxFlags & 2 /* IntrinsicIndexedElement */) {
+                    return links.resolvedJsxElementAttributesType = getIndexInfoOfSymbol(symbol, 0 /* String */).type;
                 }
                 else {
-                    if (source.flags & 131072 /* Reference */ && target.flags & 131072 /* Reference */ && source.target === target.target) {
-                        // We have type references to same target type, see if relationship holds for all type arguments
-                        if (result = typeArgumentsRelatedTo(source, target, reportErrors)) {
-                            return result;
-                        }
-                    }
-                    // Even if relationship doesn't hold for unions, intersections, or generic type references,
-                    // it may hold in a structural comparison.
-                    var apparentSource = getApparentType(source);
-                    // In a check of the form X = A & B, we will have previously checked if A relates to X or B relates
-                    // to X. Failing both of those we want to check if the aggregation of A and B's members structurally
-                    // relates to X. Thus, we include intersection types on the source side here.
-                    if (apparentSource.flags & (2588672 /* ObjectType */ | 1048576 /* Intersection */) && target.flags & 2588672 /* ObjectType */) {
-                        // Report structural errors only if we haven't reported any errors yet
-                        var reportStructuralErrors = reportErrors && errorInfo === saveErrorInfo && !(source.flags & 8190 /* Primitive */);
-                        if (result = objectTypeRelatedTo(apparentSource, source, target, reportStructuralErrors)) {
-                            errorInfo = saveErrorInfo;
-                            return result;
-                        }
-                    }
+                    return links.resolvedJsxElementAttributesType = unknownType;
+                }
+            }
+            return links.resolvedJsxElementAttributesType;
+        }
+        /**
+         * Get attributes type of the given custom opening-like JSX element.
+         * This function is intended to be called from a caller that handles intrinsic JSX element already.
+         * @param node a custom JSX opening-like element
+         * @param shouldIncludeAllStatelessAttributesType a boolean value used by language service to get all possible attributes type from an overload stateless function component
+         */
+        function getCustomJsxElementAttributesType(node, shouldIncludeAllStatelessAttributesType) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedJsxElementAttributesType) {
+                var elemClassType = getJsxGlobalElementClassType();
+                return links.resolvedJsxElementAttributesType = resolveCustomJsxElementAttributesType(node, shouldIncludeAllStatelessAttributesType, /*elementType*/ undefined, elemClassType);
+            }
+            return links.resolvedJsxElementAttributesType;
+        }
+        /**
+         * Get all possible attributes type, especially from an overload stateless function component, of the given JSX opening-like element.
+         * This function is called by language service (see: completions-tryGetGlobalSymbols).
+         * @param node a JSX opening-like element to get attributes type for
+         */
+        function getAllAttributesTypeFromJsxOpeningLikeElement(node) {
+            if (isJsxIntrinsicIdentifier(node.tagName)) {
+                return getIntrinsicAttributesTypeFromJsxOpeningLikeElement(node);
+            }
+            else {
+                // Because in language service, the given JSX opening-like element may be incomplete and therefore,
+                // we can't resolve to exact signature if the element is a stateless function component so the best thing to do is return all attributes type from all overloads.
+                return getCustomJsxElementAttributesType(node, /*shouldIncludeAllStatelessAttributesType*/ true);
+            }
+        }
+        /**
+         * Get the attributes type, which indicates the attributes that are valid on the given JSXOpeningLikeElement.
+         * @param node a JSXOpeningLikeElement node
+         * @return an attributes type of the given node
+         */
+        function getAttributesTypeFromJsxOpeningLikeElement(node) {
+            if (isJsxIntrinsicIdentifier(node.tagName)) {
+                return getIntrinsicAttributesTypeFromJsxOpeningLikeElement(node);
+            }
+            else {
+                return getCustomJsxElementAttributesType(node, /*shouldIncludeAllStatelessAttributesType*/ false);
+            }
+        }
+        /**
+         * Given a JSX attribute, returns the symbol for the corresponds property
+         * of the element attributes type. Will return unknownSymbol for attributes
+         * that have no matching element attributes type property.
+         */
+        function getJsxAttributePropertySymbol(attrib) {
+            var attributesType = getAttributesTypeFromJsxOpeningLikeElement(attrib.parent.parent);
+            var prop = getPropertyOfType(attributesType, attrib.name.text);
+            return prop || unknownSymbol;
+        }
+        function getJsxGlobalElementClassType() {
+            if (!deferredJsxElementClassType) {
+                deferredJsxElementClassType = getExportedTypeFromNamespace(JsxNames.JSX, JsxNames.ElementClass);
+            }
+            return deferredJsxElementClassType;
+        }
+        function getJsxGlobalElementType() {
+            if (!deferredJsxElementType) {
+                deferredJsxElementType = getExportedTypeFromNamespace(JsxNames.JSX, JsxNames.Element);
+            }
+            return deferredJsxElementType;
+        }
+        function getJsxGlobalStatelessElementType() {
+            if (!deferredJsxStatelessElementType) {
+                var jsxElementType = getJsxGlobalElementType();
+                if (jsxElementType) {
+                    deferredJsxStatelessElementType = getUnionType([jsxElementType, nullType]);
                 }
-                if (reportErrors) {
-                    if (source.flags & 2588672 /* ObjectType */ && target.flags & 8190 /* Primitive */) {
-                        tryElaborateErrorsForPrimitivesAndObjects(source, target);
-                    }
-                    else if (source.symbol && source.flags & 2588672 /* ObjectType */ && globalObjectType === source) {
-                        reportError(ts.Diagnostics.The_Object_type_is_assignable_to_very_few_other_types_Did_you_mean_to_use_the_any_type_instead);
-                    }
-                    reportRelationError(headMessage, source, target);
+            }
+            return deferredJsxStatelessElementType;
+        }
+        /**
+         * Returns all the properties of the Jsx.IntrinsicElements interface
+         */
+        function getJsxIntrinsicTagNames() {
+            var intrinsics = getJsxType(JsxNames.IntrinsicElements);
+            return intrinsics ? getPropertiesOfType(intrinsics) : emptyArray;
+        }
+        function checkJsxPreconditions(errorNode) {
+            // Preconditions for using JSX
+            if ((compilerOptions.jsx || 0 /* None */) === 0 /* None */) {
+                error(errorNode, ts.Diagnostics.Cannot_use_JSX_unless_the_jsx_flag_is_provided);
+            }
+            if (getJsxGlobalElementType() === undefined) {
+                if (noImplicitAny) {
+                    error(errorNode, ts.Diagnostics.JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist);
                 }
-                return 0 /* False */;
             }
-            function isIdenticalTo(source, target) {
-                var result;
-                if (source.flags & 2588672 /* ObjectType */ && target.flags & 2588672 /* ObjectType */) {
-                    if (source.flags & 131072 /* Reference */ && target.flags & 131072 /* Reference */ && source.target === target.target) {
-                        // We have type references to same target type, see if all type arguments are identical
-                        if (result = typeArgumentsRelatedTo(source, target, /*reportErrors*/ false)) {
-                            return result;
-                        }
-                    }
-                    return objectTypeRelatedTo(source, source, target, /*reportErrors*/ false);
+        }
+        function checkJsxOpeningLikeElement(node) {
+            checkGrammarJsxElement(node);
+            checkJsxPreconditions(node);
+            // The reactNamespace/jsxFactory's root symbol should be marked as 'used' so we don't incorrectly elide its import.
+            // And if there is no reactNamespace/jsxFactory's symbol in scope when targeting React emit, we should issue an error.
+            var reactRefErr = diagnostics && compilerOptions.jsx === 2 /* React */ ? ts.Diagnostics.Cannot_find_name_0 : undefined;
+            var reactNamespace = getJsxNamespace();
+            var reactSym = resolveName(node.tagName, reactNamespace, 107455 /* Value */, reactRefErr, reactNamespace);
+            if (reactSym) {
+                // Mark local symbol as referenced here because it might not have been marked
+                // if jsx emit was not react as there wont be error being emitted
+                reactSym.isReferenced = true;
+                // If react symbol is alias, mark it as refereced
+                if (reactSym.flags & 8388608 /* Alias */ && !isConstEnumOrConstEnumOnlyModule(resolveAlias(reactSym))) {
+                    markAliasSymbolAsReferenced(reactSym);
                 }
-                if (source.flags & 524288 /* Union */ && target.flags & 524288 /* Union */ ||
-                    source.flags & 1048576 /* Intersection */ && target.flags & 1048576 /* Intersection */) {
-                    if (result = eachTypeRelatedToSomeType(source, target, /*reportErrors*/ false)) {
-                        if (result &= eachTypeRelatedToSomeType(target, source, /*reportErrors*/ false)) {
-                            return result;
-                        }
-                    }
+            }
+            checkJsxAttributesAssignableToTagNameAttributes(node);
+        }
+        /**
+         * Check if a property with the given name is known anywhere in the given type. In an object type, a property
+         * is considered known if
+         * 1. the object type is empty and the check is for assignability, or
+         * 2. if the object type has index signatures, or
+         * 3. if the property is actually declared in the object type
+         *    (this means that 'toString', for example, is not usually a known property).
+         * 4. In a union or intersection type,
+         *    a property is considered known if it is known in any constituent type.
+         * @param targetType a type to search a given name in
+         * @param name a property name to search
+         * @param isComparingJsxAttributes a boolean flag indicating whether we are searching in JsxAttributesType
+         */
+        function isKnownProperty(targetType, name, isComparingJsxAttributes) {
+            if (targetType.flags & 32768 /* Object */) {
+                var resolved = resolveStructuredTypeMembers(targetType);
+                if (resolved.stringIndexInfo ||
+                    resolved.numberIndexInfo && isNumericLiteralName(name) ||
+                    getPropertyOfObjectType(targetType, name) ||
+                    isComparingJsxAttributes && !isUnhyphenatedJsxName(name)) {
+                    // For JSXAttributes, if the attribute has a hyphenated name, consider that the attribute to be known.
+                    return true;
                 }
-                return 0 /* False */;
             }
-            // Check if a property with the given name is known anywhere in the given type. In an object type, a property
-            // is considered known if the object type is empty and the check is for assignability, if the object type has
-            // index signatures, or if the property is actually declared in the object type. In a union or intersection
-            // type, a property is considered known if it is known in any constituent type.
-            function isKnownProperty(type, name) {
-                if (type.flags & 2588672 /* ObjectType */) {
-                    var resolved = resolveStructuredTypeMembers(type);
-                    if ((relation === assignableRelation || relation === comparableRelation) && (type === globalObjectType || isEmptyObjectType(resolved)) ||
-                        resolved.stringIndexInfo ||
-                        (resolved.numberIndexInfo && isNumericLiteralName(name)) ||
-                        getPropertyOfType(type, name)) {
+            else if (targetType.flags & 196608 /* UnionOrIntersection */) {
+                for (var _i = 0, _a = targetType.types; _i < _a.length; _i++) {
+                    var t = _a[_i];
+                    if (isKnownProperty(t, name, isComparingJsxAttributes)) {
                         return true;
                     }
                 }
-                else if (type.flags & 1572864 /* UnionOrIntersection */) {
-                    for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                        var t = _a[_i];
-                        if (isKnownProperty(t, name)) {
-                            return true;
-                        }
-                    }
-                }
-                return false;
             }
-            function isEmptyObjectType(t) {
-                return t.properties.length === 0 &&
-                    t.callSignatures.length === 0 &&
-                    t.constructSignatures.length === 0 &&
-                    !t.stringIndexInfo &&
-                    !t.numberIndexInfo;
+            return false;
+        }
+        /**
+         * Check whether the given attributes of JSX opening-like element is assignable to the tagName attributes.
+         *      Get the attributes type of the opening-like element through resolving the tagName, "target attributes"
+         *      Check assignablity between given attributes property, "source attributes", and the "target attributes"
+         * @param openingLikeElement an opening-like JSX element to check its JSXAttributes
+         */
+        function checkJsxAttributesAssignableToTagNameAttributes(openingLikeElement) {
+            // The function involves following steps:
+            //      1. Figure out expected attributes type by resolving tagName of the JSX opening-like element, targetAttributesType.
+            //         During these steps, we will try to resolve the tagName as intrinsic name, stateless function, stateful component (in the order)
+            //      2. Solved JSX attributes type given by users, sourceAttributesType, which is by resolving "attributes" property of the JSX opening-like element.
+            //      3. Check if the two are assignable to each other
+            // targetAttributesType is a type of an attributes from resolving tagName of an opening-like JSX element.
+            var targetAttributesType = isJsxIntrinsicIdentifier(openingLikeElement.tagName) ?
+                getIntrinsicAttributesTypeFromJsxOpeningLikeElement(openingLikeElement) :
+                getCustomJsxElementAttributesType(openingLikeElement, /*shouldIncludeAllStatelessAttributesType*/ false);
+            // sourceAttributesType is a type of an attributes properties.
+            // i.e <div attr1={10} attr2="string" />
+            //     attr1 and attr2 are treated as JSXAttributes attached in the JsxOpeningLikeElement as "attributes".
+            var sourceAttributesType = createJsxAttributesTypeFromAttributesProperty(openingLikeElement, function (attribute) {
+                return isUnhyphenatedJsxName(attribute.name) || !!(getPropertyOfType(targetAttributesType, attribute.name));
+            });
+            // If the targetAttributesType is an emptyObjectType, indicating that there is no property named 'props' on this instance type.
+            // but there exists a sourceAttributesType, we need to explicitly give an error as normal assignability check allow excess properties and will pass.
+            if (targetAttributesType === emptyObjectType && (isTypeAny(sourceAttributesType) || sourceAttributesType.properties.length > 0)) {
+                error(openingLikeElement, ts.Diagnostics.JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property, getJsxElementPropertiesName());
             }
-            function hasExcessProperties(source, target, reportErrors) {
-                if (!(target.flags & 536870912 /* ObjectLiteralPatternWithComputedProperties */) && maybeTypeOfKind(target, 2588672 /* ObjectType */)) {
-                    for (var _i = 0, _a = getPropertiesOfObjectType(source); _i < _a.length; _i++) {
-                        var prop = _a[_i];
-                        if (!isKnownProperty(target, prop.name)) {
-                            if (reportErrors) {
-                                // We know *exactly* where things went wrong when comparing the types.
-                                // Use this property as the error node as this will be more helpful in
-                                // reasoning about what went wrong.
-                                ts.Debug.assert(!!errorNode);
-                                errorNode = prop.valueDeclaration;
-                                reportError(ts.Diagnostics.Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1, symbolToString(prop), typeToString(target));
-                            }
-                            return true;
+            else {
+                // Check if sourceAttributesType assignable to targetAttributesType though this check will allow excess properties
+                var isSourceAttributeTypeAssignableToTarget = checkTypeAssignableTo(sourceAttributesType, targetAttributesType, openingLikeElement.attributes.properties.length > 0 ? openingLikeElement.attributes : openingLikeElement);
+                // After we check for assignability, we will do another pass to check that all explicitly specified attributes have correct name corresponding in targetAttributeType.
+                // This will allow excess properties in spread type as it is very common pattern to spread outter attributes into React component in its render method.
+                if (isSourceAttributeTypeAssignableToTarget && !isTypeAny(sourceAttributesType) && !isTypeAny(targetAttributesType)) {
+                    for (var _i = 0, _a = openingLikeElement.attributes.properties; _i < _a.length; _i++) {
+                        var attribute = _a[_i];
+                        if (ts.isJsxAttribute(attribute) && !isKnownProperty(targetAttributesType, attribute.name.text, /*isComparingJsxAttributes*/ true)) {
+                            error(attribute, ts.Diagnostics.Property_0_does_not_exist_on_type_1, attribute.name.text, typeToString(targetAttributesType));
+                            // We break here so that errors won't be cascading
+                            break;
                         }
                     }
                 }
-                return false;
             }
-            function eachTypeRelatedToSomeType(source, target, reportErrors) {
-                var result = -1 /* True */;
-                var sourceTypes = source.types;
-                for (var _i = 0, sourceTypes_1 = sourceTypes; _i < sourceTypes_1.length; _i++) {
-                    var sourceType = sourceTypes_1[_i];
-                    var related = typeRelatedToSomeType(sourceType, target, /*reportErrors*/ false);
-                    if (!related) {
-                        return 0 /* False */;
-                    }
-                    result &= related;
+        }
+        function checkJsxExpression(node, checkMode) {
+            if (node.expression) {
+                var type = checkExpression(node.expression, checkMode);
+                if (node.dotDotDotToken && type !== anyType && !isArrayType(type)) {
+                    error(node, ts.Diagnostics.JSX_spread_child_must_be_an_array_type, node.toString(), typeToString(type));
                 }
-                return result;
+                return type;
             }
-            function typeRelatedToSomeType(source, target, reportErrors) {
-                var targetTypes = target.types;
-                if (target.flags & 524288 /* Union */ && containsType(targetTypes, source)) {
-                    return -1 /* True */;
-                }
-                var len = targetTypes.length;
-                for (var i = 0; i < len; i++) {
-                    var related = isRelatedTo(source, targetTypes[i], reportErrors && i === len - 1);
-                    if (related) {
-                        return related;
+            else {
+                return unknownType;
+            }
+        }
+        // If a symbol is a synthesized symbol with no value declaration, we assume it is a property. Example of this are the synthesized
+        // '.prototype' property as well as synthesized tuple index properties.
+        function getDeclarationKindFromSymbol(s) {
+            return s.valueDeclaration ? s.valueDeclaration.kind : 149 /* PropertyDeclaration */;
+        }
+        function getDeclarationNodeFlagsFromSymbol(s) {
+            return s.valueDeclaration ? ts.getCombinedNodeFlags(s.valueDeclaration) : 0;
+        }
+        function isMethodLike(symbol) {
+            return !!(symbol.flags & 8192 /* Method */ || ts.getCheckFlags(symbol) & 4 /* SyntheticMethod */);
+        }
+        /**
+         * Check whether the requested property access is valid.
+         * Returns true if node is a valid property access, and false otherwise.
+         * @param node The node to be checked.
+         * @param left The left hand side of the property access (e.g.: the super in `super.foo`).
+         * @param type The type of left.
+         * @param prop The symbol for the right hand side of the property access.
+         */
+        function checkPropertyAccessibility(node, left, type, prop) {
+            var flags = ts.getDeclarationModifierFlagsFromSymbol(prop);
+            var errorNode = node.kind === 179 /* PropertyAccessExpression */ || node.kind === 226 /* VariableDeclaration */ ?
+                node.name :
+                node.right;
+            if (ts.getCheckFlags(prop) & 256 /* ContainsPrivate */) {
+                // Synthetic property with private constituent property
+                error(errorNode, ts.Diagnostics.Property_0_has_conflicting_declarations_and_is_inaccessible_in_type_1, symbolToString(prop), typeToString(type));
+                return false;
+            }
+            if (left.kind === 97 /* SuperKeyword */) {
+                // TS 1.0 spec (April 2014): 4.8.2
+                // - In a constructor, instance member function, instance member accessor, or
+                //   instance member variable initializer where this references a derived class instance,
+                //   a super property access is permitted and must specify a public instance member function of the base class.
+                // - In a static member function or static member accessor
+                //   where this references the constructor function object of a derived class,
+                //   a super property access is permitted and must specify a public static member function of the base class.
+                if (languageVersion < 2 /* ES2015 */) {
+                    var hasNonMethodDeclaration = forEachProperty(prop, function (p) {
+                        var propKind = getDeclarationKindFromSymbol(p);
+                        return propKind !== 151 /* MethodDeclaration */ && propKind !== 150 /* MethodSignature */;
+                    });
+                    if (hasNonMethodDeclaration) {
+                        error(errorNode, ts.Diagnostics.Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword);
+                        return false;
                     }
                 }
-                return 0 /* False */;
+                if (flags & 128 /* Abstract */) {
+                    // A method cannot be accessed in a super property access if the method is abstract.
+                    // This error could mask a private property access error. But, a member
+                    // cannot simultaneously be private and abstract, so this will trigger an
+                    // additional error elsewhere.
+                    error(errorNode, ts.Diagnostics.Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression, symbolToString(prop), typeToString(getDeclaringClass(prop)));
+                    return false;
+                }
             }
-            function typeRelatedToEachType(source, target, reportErrors) {
-                var result = -1 /* True */;
-                var targetTypes = target.types;
-                for (var _i = 0, targetTypes_1 = targetTypes; _i < targetTypes_1.length; _i++) {
-                    var targetType = targetTypes_1[_i];
-                    var related = isRelatedTo(source, targetType, reportErrors);
-                    if (!related) {
-                        return 0 /* False */;
-                    }
-                    result &= related;
+            // Public properties are otherwise accessible.
+            if (!(flags & 24 /* NonPublicAccessibilityModifier */)) {
+                return true;
+            }
+            // Property is known to be private or protected at this point
+            // Private property is accessible if the property is within the declaring class
+            if (flags & 8 /* Private */) {
+                var declaringClassDeclaration = getClassLikeDeclarationOfSymbol(getParentOfSymbol(prop));
+                if (!isNodeWithinClass(node, declaringClassDeclaration)) {
+                    error(errorNode, ts.Diagnostics.Property_0_is_private_and_only_accessible_within_class_1, symbolToString(prop), typeToString(getDeclaringClass(prop)));
+                    return false;
                 }
-                return result;
+                return true;
             }
-            function someTypeRelatedToType(source, target, reportErrors) {
-                var sourceTypes = source.types;
-                if (source.flags & 524288 /* Union */ && containsType(sourceTypes, target)) {
-                    return -1 /* True */;
+            // Property is known to be protected at this point
+            // All protected properties of a supertype are accessible in a super access
+            if (left.kind === 97 /* SuperKeyword */) {
+                return true;
+            }
+            // Find the first enclosing class that has the declaring classes of the protected constituents
+            // of the property as base classes
+            var enclosingClass = forEachEnclosingClass(node, function (enclosingDeclaration) {
+                var enclosingClass = getDeclaredTypeOfSymbol(getSymbolOfNode(enclosingDeclaration));
+                return isClassDerivedFromDeclaringClasses(enclosingClass, prop) ? enclosingClass : undefined;
+            });
+            // A protected property is accessible if the property is within the declaring class or classes derived from it
+            if (!enclosingClass) {
+                error(errorNode, ts.Diagnostics.Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses, symbolToString(prop), typeToString(getDeclaringClass(prop) || type));
+                return false;
+            }
+            // No further restrictions for static properties
+            if (flags & 32 /* Static */) {
+                return true;
+            }
+            // An instance property must be accessed through an instance of the enclosing class
+            if (type.flags & 16384 /* TypeParameter */ && type.isThisType) {
+                // get the original type -- represented as the type constraint of the 'this' type
+                type = getConstraintOfTypeParameter(type);
+            }
+            if (!(getObjectFlags(getTargetType(type)) & 3 /* ClassOrInterface */ && hasBaseType(type, enclosingClass))) {
+                error(errorNode, ts.Diagnostics.Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1, symbolToString(prop), typeToString(enclosingClass));
+                return false;
+            }
+            return true;
+        }
+        function checkNonNullExpression(node) {
+            return checkNonNullType(checkExpression(node), node);
+        }
+        function checkNonNullType(type, errorNode) {
+            var kind = (strictNullChecks ? getFalsyFlags(type) : type.flags) & 6144 /* Nullable */;
+            if (kind) {
+                error(errorNode, kind & 2048 /* Undefined */ ? kind & 4096 /* Null */ ?
+                    ts.Diagnostics.Object_is_possibly_null_or_undefined :
+                    ts.Diagnostics.Object_is_possibly_undefined :
+                    ts.Diagnostics.Object_is_possibly_null);
+                var t = getNonNullableType(type);
+                return t.flags & (6144 /* Nullable */ | 8192 /* Never */) ? unknownType : t;
+            }
+            return type;
+        }
+        function checkPropertyAccessExpression(node) {
+            return checkPropertyAccessExpressionOrQualifiedName(node, node.expression, node.name);
+        }
+        function checkQualifiedName(node) {
+            return checkPropertyAccessExpressionOrQualifiedName(node, node.left, node.right);
+        }
+        function checkPropertyAccessExpressionOrQualifiedName(node, left, right) {
+            var type = checkNonNullExpression(left);
+            if (isTypeAny(type) || type === silentNeverType) {
+                return type;
+            }
+            var apparentType = getApparentType(getWidenedType(type));
+            if (apparentType === unknownType || (type.flags & 16384 /* TypeParameter */ && isTypeAny(apparentType))) {
+                // handle cases when type is Type parameter with invalid or any constraint
+                return apparentType;
+            }
+            var prop = getPropertyOfType(apparentType, right.text);
+            if (!prop) {
+                var stringIndexType = getIndexTypeOfType(apparentType, 0 /* String */);
+                if (stringIndexType) {
+                    return stringIndexType;
                 }
-                var len = sourceTypes.length;
-                for (var i = 0; i < len; i++) {
-                    var related = isRelatedTo(sourceTypes[i], target, reportErrors && i === len - 1);
-                    if (related) {
-                        return related;
-                    }
+                if (right.text && !checkAndReportErrorForExtendingInterface(node)) {
+                    reportNonexistentProperty(right, type.flags & 16384 /* TypeParameter */ && type.isThisType ? apparentType : type);
                 }
-                return 0 /* False */;
+                return unknownType;
             }
-            function eachTypeRelatedToType(source, target, reportErrors) {
-                var result = -1 /* True */;
-                var sourceTypes = source.types;
-                for (var _i = 0, sourceTypes_2 = sourceTypes; _i < sourceTypes_2.length; _i++) {
-                    var sourceType = sourceTypes_2[_i];
-                    var related = isRelatedTo(sourceType, target, reportErrors);
-                    if (!related) {
-                        return 0 /* False */;
-                    }
-                    result &= related;
+            if (prop.valueDeclaration) {
+                if (isInPropertyInitializer(node) &&
+                    !isBlockScopedNameDeclaredBeforeUse(prop.valueDeclaration, right)) {
+                    error(right, ts.Diagnostics.Block_scoped_variable_0_used_before_its_declaration, right.text);
+                }
+                if (prop.valueDeclaration.kind === 229 /* ClassDeclaration */ &&
+                    node.parent && node.parent.kind !== 159 /* TypeReference */ &&
+                    !ts.isInAmbientContext(prop.valueDeclaration) &&
+                    !isBlockScopedNameDeclaredBeforeUse(prop.valueDeclaration, right)) {
+                    error(right, ts.Diagnostics.Class_0_used_before_its_declaration, right.text);
                 }
-                return result;
             }
-            function typeArgumentsRelatedTo(source, target, reportErrors) {
-                var sources = source.typeArguments || emptyArray;
-                var targets = target.typeArguments || emptyArray;
-                if (sources.length !== targets.length && relation === identityRelation) {
-                    return 0 /* False */;
+            markPropertyAsReferenced(prop);
+            getNodeLinks(node).resolvedSymbol = prop;
+            checkPropertyAccessibility(node, left, apparentType, prop);
+            var propType = getDeclaredOrApparentType(prop, node);
+            var assignmentKind = ts.getAssignmentTargetKind(node);
+            if (assignmentKind) {
+                if (isReferenceToReadonlyEntity(node, prop) || isReferenceThroughNamespaceImport(node)) {
+                    error(right, ts.Diagnostics.Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property, right.text);
+                    return unknownType;
                 }
-                var length = sources.length <= targets.length ? sources.length : targets.length;
-                var result = -1 /* True */;
-                for (var i = 0; i < length; i++) {
-                    var related = isRelatedTo(sources[i], targets[i], reportErrors);
-                    if (!related) {
-                        return 0 /* False */;
+            }
+            // Only compute control flow type if this is a property access expression that isn't an
+            // assignment target, and the referenced property was declared as a variable, property,
+            // accessor, or optional method.
+            if (node.kind !== 179 /* PropertyAccessExpression */ || assignmentKind === 1 /* Definite */ ||
+                !(prop.flags & (3 /* Variable */ | 4 /* Property */ | 98304 /* Accessor */)) &&
+                    !(prop.flags & 8192 /* Method */ && propType.flags & 65536 /* Union */)) {
+                return propType;
+            }
+            var flowType = getFlowTypeOfReference(node, propType);
+            return assignmentKind ? getBaseTypeOfLiteralType(flowType) : flowType;
+        }
+        function reportNonexistentProperty(propNode, containingType) {
+            var errorInfo;
+            if (containingType.flags & 65536 /* Union */ && !(containingType.flags & 8190 /* Primitive */)) {
+                for (var _i = 0, _a = containingType.types; _i < _a.length; _i++) {
+                    var subtype = _a[_i];
+                    if (!getPropertyOfType(subtype, propNode.text)) {
+                        errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.Property_0_does_not_exist_on_type_1, ts.declarationNameToString(propNode), typeToString(subtype));
+                        break;
                     }
-                    result &= related;
                 }
-                return result;
             }
-            // Determine if two object types are related by structure. First, check if the result is already available in the global cache.
-            // Second, check if we have already started a comparison of the given two types in which case we assume the result to be true.
-            // Third, check if both types are part of deeply nested chains of generic type instantiations and if so assume the types are
-            // equal and infinitely expanding. Fourth, if we have reached a depth of 100 nested comparisons, assume we have runaway recursion
-            // and issue an error. Otherwise, actually compare the structure of the two types.
-            function objectTypeRelatedTo(source, originalSource, target, reportErrors) {
-                if (overflow) {
-                    return 0 /* False */;
+            var suggestion = getSuggestionForNonexistentProperty(propNode, containingType);
+            if (suggestion) {
+                errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.Property_0_does_not_exist_on_type_1_Did_you_mean_2, ts.declarationNameToString(propNode), typeToString(containingType), suggestion);
+            }
+            else {
+                errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.Property_0_does_not_exist_on_type_1, ts.declarationNameToString(propNode), typeToString(containingType));
+            }
+            diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(propNode, errorInfo));
+        }
+        function getSuggestionForNonexistentProperty(node, containingType) {
+            var suggestion = getSpellingSuggestionForName(node.text, getPropertiesOfObjectType(containingType), 107455 /* Value */);
+            return suggestion && suggestion.name;
+        }
+        function getSuggestionForNonexistentSymbol(location, name, meaning) {
+            var result = resolveNameHelper(location, name, meaning, /*nameNotFoundMessage*/ undefined, name, function (symbols, name, meaning) {
+                var symbol = getSymbol(symbols, name, meaning);
+                if (symbol) {
+                    // Sometimes the symbol is found when location is a return type of a function: `typeof x` and `x` is declared in the body of the function
+                    // So the table *contains* `x` but `x` isn't actually in scope.
+                    // However, resolveNameHelper will continue and call this callback again, so we'll eventually get a correct suggestion.
+                    return symbol;
                 }
-                var id = relation !== identityRelation || source.id < target.id ? source.id + "," + target.id : target.id + "," + source.id;
-                var related = relation[id];
-                if (related !== undefined) {
-                    if (reportErrors && related === 2 /* Failed */) {
-                        // We are elaborating errors and the cached result is an unreported failure. Record the result as a reported
-                        // failure and continue computing the relation such that errors get reported.
-                        relation[id] = 3 /* FailedAndReported */;
+                return getSpellingSuggestionForName(name, ts.arrayFrom(symbols.values()), meaning);
+            });
+            if (result) {
+                return result.name;
+            }
+        }
+        /**
+         * Given a name and a list of symbols whose names are *not* equal to the name, return a spelling suggestion if there is one that is close enough.
+         * Names less than length 3 only check for case-insensitive equality, not levenshtein distance.
+         *
+         * If there is a candidate that's the same except for case, return that.
+         * If there is a candidate that's within one edit of the name, return that.
+         * Otherwise, return the candidate with the smallest Levenshtein distance,
+         *    except for candidates:
+         *      * With no name
+         *      * Whose meaning doesn't match the `meaning` parameter.
+         *      * Whose length differs from the target name by more than 0.3 of the length of the name.
+         *      * Whose levenshtein distance is more than 0.4 of the length of the name
+         *        (0.4 allows 1 substitution/transposition for every 5 characters,
+         *         and 1 insertion/deletion at 3 characters)
+         * Names longer than 30 characters don't get suggestions because Levenshtein distance is an n**2 algorithm.
+         */
+        function getSpellingSuggestionForName(name, symbols, meaning) {
+            var worstDistance = name.length * 0.4;
+            var maximumLengthDifference = Math.min(3, name.length * 0.34);
+            var bestDistance = Number.MAX_VALUE;
+            var bestCandidate = undefined;
+            var justCheckExactMatches = false;
+            if (name.length > 30) {
+                return undefined;
+            }
+            name = name.toLowerCase();
+            for (var _i = 0, symbols_3 = symbols; _i < symbols_3.length; _i++) {
+                var candidate = symbols_3[_i];
+                if (candidate.flags & meaning &&
+                    candidate.name &&
+                    Math.abs(candidate.name.length - name.length) < maximumLengthDifference) {
+                    var candidateName = candidate.name.toLowerCase();
+                    if (candidateName === name) {
+                        return candidate;
                     }
-                    else {
-                        return related === 1 /* Succeeded */ ? -1 /* True */ : 0 /* False */;
+                    if (justCheckExactMatches) {
+                        continue;
                     }
-                }
-                if (depth > 0) {
-                    for (var i = 0; i < depth; i++) {
-                        // If source and target are already being compared, consider them related with assumptions
-                        if (maybeStack[i][id]) {
-                            return 1 /* Maybe */;
-                        }
+                    if (candidateName.length < 3 ||
+                        name.length < 3 ||
+                        candidateName === "eval" ||
+                        candidateName === "intl" ||
+                        candidateName === "undefined" ||
+                        candidateName === "map" ||
+                        candidateName === "nan" ||
+                        candidateName === "set") {
+                        continue;
                     }
-                    if (depth === 100) {
-                        overflow = true;
-                        return 0 /* False */;
+                    var distance = ts.levenshtein(name, candidateName);
+                    if (distance > worstDistance) {
+                        continue;
                     }
-                }
-                else {
-                    sourceStack = [];
-                    targetStack = [];
-                    maybeStack = [];
-                    expandingFlags = 0;
-                }
-                sourceStack[depth] = source;
-                targetStack[depth] = target;
-                maybeStack[depth] = ts.createMap();
-                maybeStack[depth][id] = 1 /* Succeeded */;
-                depth++;
-                var saveExpandingFlags = expandingFlags;
-                if (!(expandingFlags & 1) && isDeeplyNestedGeneric(source, sourceStack, depth))
-                    expandingFlags |= 1;
-                if (!(expandingFlags & 2) && isDeeplyNestedGeneric(target, targetStack, depth))
-                    expandingFlags |= 2;
-                var result;
-                if (expandingFlags === 3) {
-                    result = 1 /* Maybe */;
-                }
-                else {
-                    result = propertiesRelatedTo(source, target, reportErrors);
-                    if (result) {
-                        result &= signaturesRelatedTo(source, target, 0 /* Call */, reportErrors);
-                        if (result) {
-                            result &= signaturesRelatedTo(source, target, 1 /* Construct */, reportErrors);
-                            if (result) {
-                                result &= indexTypesRelatedTo(source, originalSource, target, 0 /* String */, reportErrors);
-                                if (result) {
-                                    result &= indexTypesRelatedTo(source, originalSource, target, 1 /* Number */, reportErrors);
-                                }
-                            }
-                        }
+                    if (distance < 3) {
+                        justCheckExactMatches = true;
+                        bestCandidate = candidate;
                     }
-                }
-                expandingFlags = saveExpandingFlags;
-                depth--;
-                if (result) {
-                    var maybeCache = maybeStack[depth];
-                    // If result is definitely true, copy assumptions to global cache, else copy to next level up
-                    var destinationCache = (result === -1 /* True */ || depth === 0) ? relation : maybeStack[depth - 1];
-                    ts.copyProperties(maybeCache, destinationCache);
-                }
-                else {
-                    // A false result goes straight into global cache (when something is false under assumptions it
-                    // will also be false without assumptions)
-                    relation[id] = reportErrors ? 3 /* FailedAndReported */ : 2 /* Failed */;
-                }
-                return result;
-            }
-            function propertiesRelatedTo(source, target, reportErrors) {
-                if (relation === identityRelation) {
-                    return propertiesIdenticalTo(source, target);
-                }
-                var result = -1 /* True */;
-                var properties = getPropertiesOfObjectType(target);
-                var requireOptionalProperties = relation === subtypeRelation && !(source.flags & 8388608 /* ObjectLiteral */);
-                for (var _i = 0, properties_2 = properties; _i < properties_2.length; _i++) {
-                    var targetProp = properties_2[_i];
-                    var sourceProp = getPropertyOfType(source, targetProp.name);
-                    if (sourceProp !== targetProp) {
-                        if (!sourceProp) {
-                            if (!(targetProp.flags & 536870912 /* Optional */) || requireOptionalProperties) {
-                                if (reportErrors) {
-                                    reportError(ts.Diagnostics.Property_0_is_missing_in_type_1, symbolToString(targetProp), typeToString(source));
-                                }
-                                return 0 /* False */;
-                            }
-                        }
-                        else if (!(targetProp.flags & 134217728 /* Prototype */)) {
-                            var sourcePropFlags = getDeclarationModifierFlagsFromSymbol(sourceProp);
-                            var targetPropFlags = getDeclarationModifierFlagsFromSymbol(targetProp);
-                            if (sourcePropFlags & 8 /* Private */ || targetPropFlags & 8 /* Private */) {
-                                if (sourceProp.valueDeclaration !== targetProp.valueDeclaration) {
-                                    if (reportErrors) {
-                                        if (sourcePropFlags & 8 /* Private */ && targetPropFlags & 8 /* Private */) {
-                                            reportError(ts.Diagnostics.Types_have_separate_declarations_of_a_private_property_0, symbolToString(targetProp));
-                                        }
-                                        else {
-                                            reportError(ts.Diagnostics.Property_0_is_private_in_type_1_but_not_in_type_2, symbolToString(targetProp), typeToString(sourcePropFlags & 8 /* Private */ ? source : target), typeToString(sourcePropFlags & 8 /* Private */ ? target : source));
-                                        }
-                                    }
-                                    return 0 /* False */;
-                                }
-                            }
-                            else if (targetPropFlags & 16 /* Protected */) {
-                                var sourceDeclaredInClass = sourceProp.parent && sourceProp.parent.flags & 32 /* Class */;
-                                var sourceClass = sourceDeclaredInClass ? getDeclaredTypeOfSymbol(getParentOfSymbol(sourceProp)) : undefined;
-                                var targetClass = getDeclaredTypeOfSymbol(getParentOfSymbol(targetProp));
-                                if (!sourceClass || !hasBaseType(sourceClass, targetClass)) {
-                                    if (reportErrors) {
-                                        reportError(ts.Diagnostics.Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2, symbolToString(targetProp), typeToString(sourceClass || source), typeToString(targetClass));
-                                    }
-                                    return 0 /* False */;
-                                }
-                            }
-                            else if (sourcePropFlags & 16 /* Protected */) {
-                                if (reportErrors) {
-                                    reportError(ts.Diagnostics.Property_0_is_protected_in_type_1_but_public_in_type_2, symbolToString(targetProp), typeToString(source), typeToString(target));
-                                }
-                                return 0 /* False */;
-                            }
-                            var related = isRelatedTo(getTypeOfSymbol(sourceProp), getTypeOfSymbol(targetProp), reportErrors);
-                            if (!related) {
-                                if (reportErrors) {
-                                    reportError(ts.Diagnostics.Types_of_property_0_are_incompatible, symbolToString(targetProp));
-                                }
-                                return 0 /* False */;
-                            }
-                            result &= related;
-                            if (sourceProp.flags & 536870912 /* Optional */ && !(targetProp.flags & 536870912 /* Optional */)) {
-                                // TypeScript 1.0 spec (April 2014): 3.8.3
-                                // S is a subtype of a type T, and T is a supertype of S if ...
-                                // S' and T are object types and, for each member M in T..
-                                // M is a property and S' contains a property N where
-                                // if M is a required property, N is also a required property
-                                // (M - property in T)
-                                // (N - property in S)
-                                if (reportErrors) {
-                                    reportError(ts.Diagnostics.Property_0_is_optional_in_type_1_but_required_in_type_2, symbolToString(targetProp), typeToString(source), typeToString(target));
-                                }
-                                return 0 /* False */;
-                            }
-                        }
+                    else if (distance < bestDistance) {
+                        bestDistance = distance;
+                        bestCandidate = candidate;
                     }
                 }
-                return result;
             }
-            function propertiesIdenticalTo(source, target) {
-                if (!(source.flags & 2588672 /* ObjectType */ && target.flags & 2588672 /* ObjectType */)) {
-                    return 0 /* False */;
-                }
-                var sourceProperties = getPropertiesOfObjectType(source);
-                var targetProperties = getPropertiesOfObjectType(target);
-                if (sourceProperties.length !== targetProperties.length) {
-                    return 0 /* False */;
+            return bestCandidate;
+        }
+        function markPropertyAsReferenced(prop) {
+            if (prop &&
+                noUnusedIdentifiers &&
+                (prop.flags & 106500 /* ClassMember */) &&
+                prop.valueDeclaration && (ts.getModifierFlags(prop.valueDeclaration) & 8 /* Private */)) {
+                if (ts.getCheckFlags(prop) & 1 /* Instantiated */) {
+                    getSymbolLinks(prop).target.isReferenced = true;
                 }
-                var result = -1 /* True */;
-                for (var _i = 0, sourceProperties_1 = sourceProperties; _i < sourceProperties_1.length; _i++) {
-                    var sourceProp = sourceProperties_1[_i];
-                    var targetProp = getPropertyOfObjectType(target, sourceProp.name);
-                    if (!targetProp) {
-                        return 0 /* False */;
-                    }
-                    var related = compareProperties(sourceProp, targetProp, isRelatedTo);
-                    if (!related) {
-                        return 0 /* False */;
-                    }
-                    result &= related;
+                else {
+                    prop.isReferenced = true;
                 }
-                return result;
             }
-            function signaturesRelatedTo(source, target, kind, reportErrors) {
-                if (relation === identityRelation) {
-                    return signaturesIdenticalTo(source, target, kind);
-                }
-                if (target === anyFunctionType || source === anyFunctionType) {
-                    return -1 /* True */;
+        }
+        function isInPropertyInitializer(node) {
+            while (node) {
+                if (node.parent && node.parent.kind === 149 /* PropertyDeclaration */ && node.parent.initializer === node) {
+                    return true;
                 }
-                var sourceSignatures = getSignaturesOfType(source, kind);
-                var targetSignatures = getSignaturesOfType(target, kind);
-                if (kind === 1 /* Construct */ && sourceSignatures.length && targetSignatures.length) {
-                    if (isAbstractConstructorType(source) && !isAbstractConstructorType(target)) {
-                        // An abstract constructor type is not assignable to a non-abstract constructor type
-                        // as it would otherwise be possible to new an abstract class. Note that the assignability
-                        // check we perform for an extends clause excludes construct signatures from the target,
-                        // so this check never proceeds.
-                        if (reportErrors) {
-                            reportError(ts.Diagnostics.Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type);
-                        }
-                        return 0 /* False */;
-                    }
-                    if (!constructorVisibilitiesAreCompatible(sourceSignatures[0], targetSignatures[0], reportErrors)) {
-                        return 0 /* False */;
-                    }
+                node = node.parent;
+            }
+            return false;
+        }
+        function isValidPropertyAccess(node, propertyName) {
+            var left = node.kind === 179 /* PropertyAccessExpression */
+                ? node.expression
+                : node.left;
+            return isValidPropertyAccessWithType(node, left, propertyName, getWidenedType(checkExpression(left)));
+        }
+        function isValidPropertyAccessWithType(node, left, propertyName, type) {
+            if (type !== unknownType && !isTypeAny(type)) {
+                var prop = getPropertyOfType(type, propertyName);
+                if (prop) {
+                    return checkPropertyAccessibility(node, left, type, prop);
                 }
-                var result = -1 /* True */;
-                var saveErrorInfo = errorInfo;
-                outer: for (var _i = 0, targetSignatures_1 = targetSignatures; _i < targetSignatures_1.length; _i++) {
-                    var t = targetSignatures_1[_i];
-                    // Only elaborate errors from the first failure
-                    var shouldElaborateErrors = reportErrors;
-                    for (var _a = 0, sourceSignatures_1 = sourceSignatures; _a < sourceSignatures_1.length; _a++) {
-                        var s = sourceSignatures_1[_a];
-                        var related = signatureRelatedTo(s, t, shouldElaborateErrors);
-                        if (related) {
-                            result &= related;
-                            errorInfo = saveErrorInfo;
-                            continue outer;
+                // In js files properties of unions are allowed in completion
+                if (ts.isInJavaScriptFile(left) && (type.flags & 65536 /* Union */)) {
+                    for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                        var elementType = _a[_i];
+                        if (isValidPropertyAccessWithType(node, left, propertyName, elementType)) {
+                            return true;
                         }
-                        shouldElaborateErrors = false;
-                    }
-                    if (shouldElaborateErrors) {
-                        reportError(ts.Diagnostics.Type_0_provides_no_match_for_the_signature_1, typeToString(source), signatureToString(t, /*enclosingDeclaration*/ undefined, /*flags*/ undefined, kind));
                     }
-                    return 0 /* False */;
                 }
-                return result;
-            }
-            /**
-             * See signatureAssignableTo, compareSignaturesIdentical
-             */
-            function signatureRelatedTo(source, target, reportErrors) {
-                return compareSignaturesRelated(source, target, /*ignoreReturnTypes*/ false, reportErrors, reportError, isRelatedTo);
+                return false;
             }
-            function signaturesIdenticalTo(source, target, kind) {
-                var sourceSignatures = getSignaturesOfType(source, kind);
-                var targetSignatures = getSignaturesOfType(target, kind);
-                if (sourceSignatures.length !== targetSignatures.length) {
-                    return 0 /* False */;
-                }
-                var result = -1 /* True */;
-                for (var i = 0, len = sourceSignatures.length; i < len; i++) {
-                    var related = compareSignaturesIdentical(sourceSignatures[i], targetSignatures[i], /*partialMatch*/ false, /*ignoreThisTypes*/ false, /*ignoreReturnTypes*/ false, isRelatedTo);
-                    if (!related) {
-                        return 0 /* False */;
-                    }
-                    result &= related;
+            return true;
+        }
+        /**
+         * Return the symbol of the for-in variable declared or referenced by the given for-in statement.
+         */
+        function getForInVariableSymbol(node) {
+            var initializer = node.initializer;
+            if (initializer.kind === 227 /* VariableDeclarationList */) {
+                var variable = initializer.declarations[0];
+                if (variable && !ts.isBindingPattern(variable.name)) {
+                    return getSymbolOfNode(variable);
                 }
-                return result;
             }
-            function eachPropertyRelatedTo(source, target, kind, reportErrors) {
-                var result = -1 /* True */;
-                for (var _i = 0, _a = getPropertiesOfObjectType(source); _i < _a.length; _i++) {
-                    var prop = _a[_i];
-                    if (kind === 0 /* String */ || isNumericLiteralName(prop.name)) {
-                        var related = isRelatedTo(getTypeOfSymbol(prop), target, reportErrors);
-                        if (!related) {
-                            if (reportErrors) {
-                                reportError(ts.Diagnostics.Property_0_is_incompatible_with_index_signature, symbolToString(prop));
-                            }
-                            return 0 /* False */;
+            else if (initializer.kind === 71 /* Identifier */) {
+                return getResolvedSymbol(initializer);
+            }
+            return undefined;
+        }
+        /**
+         * Return true if the given type is considered to have numeric property names.
+         */
+        function hasNumericPropertyNames(type) {
+            return getIndexTypeOfType(type, 1 /* Number */) && !getIndexTypeOfType(type, 0 /* String */);
+        }
+        /**
+         * Return true if given node is an expression consisting of an identifier (possibly parenthesized)
+         * that references a for-in variable for an object with numeric property names.
+         */
+        function isForInVariableForNumericPropertyNames(expr) {
+            var e = ts.skipParentheses(expr);
+            if (e.kind === 71 /* Identifier */) {
+                var symbol = getResolvedSymbol(e);
+                if (symbol.flags & 3 /* Variable */) {
+                    var child = expr;
+                    var node = expr.parent;
+                    while (node) {
+                        if (node.kind === 215 /* ForInStatement */ &&
+                            child === node.statement &&
+                            getForInVariableSymbol(node) === symbol &&
+                            hasNumericPropertyNames(getTypeOfExpression(node.expression))) {
+                            return true;
                         }
-                        result &= related;
+                        child = node;
+                        node = node.parent;
                     }
                 }
-                return result;
             }
-            function indexInfoRelatedTo(sourceInfo, targetInfo, reportErrors) {
-                var related = isRelatedTo(sourceInfo.type, targetInfo.type, reportErrors);
-                if (!related && reportErrors) {
-                    reportError(ts.Diagnostics.Index_signatures_are_incompatible);
+            return false;
+        }
+        function checkIndexedAccess(node) {
+            var objectType = checkNonNullExpression(node.expression);
+            var indexExpression = node.argumentExpression;
+            if (!indexExpression) {
+                var sourceFile = ts.getSourceFileOfNode(node);
+                if (node.parent.kind === 182 /* NewExpression */ && node.parent.expression === node) {
+                    var start = ts.skipTrivia(sourceFile.text, node.expression.end);
+                    var end = node.end;
+                    grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead);
                 }
-                return related;
-            }
-            function indexTypesRelatedTo(source, originalSource, target, kind, reportErrors) {
-                if (relation === identityRelation) {
-                    return indexTypesIdenticalTo(source, target, kind);
+                else {
+                    var start = node.end - "]".length;
+                    var end = node.end;
+                    grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.Expression_expected);
                 }
-                var targetInfo = getIndexInfoOfType(target, kind);
-                if (!targetInfo || ((targetInfo.type.flags & 1 /* Any */) && !(originalSource.flags & 8190 /* Primitive */))) {
-                    // Index signature of type any permits assignment from everything but primitives
-                    return -1 /* True */;
+                return unknownType;
+            }
+            var indexType = isForInVariableForNumericPropertyNames(indexExpression) ? numberType : checkExpression(indexExpression);
+            if (objectType === unknownType || objectType === silentNeverType) {
+                return objectType;
+            }
+            if (isConstEnumObjectType(objectType) && indexExpression.kind !== 9 /* StringLiteral */) {
+                error(indexExpression, ts.Diagnostics.A_const_enum_member_can_only_be_accessed_using_a_string_literal);
+                return unknownType;
+            }
+            return checkIndexedAccessIndexType(getIndexedAccessType(objectType, indexType, node), node);
+        }
+        function checkThatExpressionIsProperSymbolReference(expression, expressionType, reportError) {
+            if (expressionType === unknownType) {
+                // There is already an error, so no need to report one.
+                return false;
+            }
+            if (!ts.isWellKnownSymbolSyntactically(expression)) {
+                return false;
+            }
+            // Make sure the property type is the primitive symbol type
+            if ((expressionType.flags & 512 /* ESSymbol */) === 0) {
+                if (reportError) {
+                    error(expression, ts.Diagnostics.A_computed_property_name_of_the_form_0_must_be_of_type_symbol, ts.getTextOfNode(expression));
                 }
-                var sourceInfo = getIndexInfoOfType(source, kind) ||
-                    kind === 1 /* Number */ && getIndexInfoOfType(source, 0 /* String */);
-                if (sourceInfo) {
-                    return indexInfoRelatedTo(sourceInfo, targetInfo, reportErrors);
+                return false;
+            }
+            // The name is Symbol.<someName>, so make sure Symbol actually resolves to the
+            // global Symbol object
+            var leftHandSide = expression.expression;
+            var leftHandSideSymbol = getResolvedSymbol(leftHandSide);
+            if (!leftHandSideSymbol) {
+                return false;
+            }
+            var globalESSymbol = getGlobalESSymbolConstructorSymbol(/*reportErrors*/ true);
+            if (!globalESSymbol) {
+                // Already errored when we tried to look up the symbol
+                return false;
+            }
+            if (leftHandSideSymbol !== globalESSymbol) {
+                if (reportError) {
+                    error(leftHandSide, ts.Diagnostics.Symbol_reference_does_not_refer_to_the_global_Symbol_constructor_object);
                 }
-                if (isObjectLiteralType(source)) {
-                    var related = -1 /* True */;
-                    if (kind === 0 /* String */) {
-                        var sourceNumberInfo = getIndexInfoOfType(source, 1 /* Number */);
-                        if (sourceNumberInfo) {
-                            related = indexInfoRelatedTo(sourceNumberInfo, targetInfo, reportErrors);
-                        }
+                return false;
+            }
+            return true;
+        }
+        function callLikeExpressionMayHaveTypeArguments(node) {
+            // TODO: Also include tagged templates (https://github.com/Microsoft/TypeScript/issues/11947)
+            return ts.isCallOrNewExpression(node);
+        }
+        function resolveUntypedCall(node) {
+            if (callLikeExpressionMayHaveTypeArguments(node)) {
+                // Check type arguments even though we will give an error that untyped calls may not accept type arguments.
+                // This gets us diagnostics for the type arguments and marks them as referenced.
+                ts.forEach(node.typeArguments, checkSourceElement);
+            }
+            if (node.kind === 183 /* TaggedTemplateExpression */) {
+                checkExpression(node.template);
+            }
+            else if (node.kind !== 147 /* Decorator */) {
+                ts.forEach(node.arguments, function (argument) {
+                    checkExpression(argument);
+                });
+            }
+            return anySignature;
+        }
+        function resolveErrorCall(node) {
+            resolveUntypedCall(node);
+            return unknownSignature;
+        }
+        // Re-order candidate signatures into the result array. Assumes the result array to be empty.
+        // The candidate list orders groups in reverse, but within a group signatures are kept in declaration order
+        // A nit here is that we reorder only signatures that belong to the same symbol,
+        // so order how inherited signatures are processed is still preserved.
+        // interface A { (x: string): void }
+        // interface B extends A { (x: 'foo'): string }
+        // const b: B;
+        // b('foo') // <- here overloads should be processed as [(x:'foo'): string, (x: string): void]
+        function reorderCandidates(signatures, result) {
+            var lastParent;
+            var lastSymbol;
+            var cutoffIndex = 0;
+            var index;
+            var specializedIndex = -1;
+            var spliceIndex;
+            ts.Debug.assert(!result.length);
+            for (var _i = 0, signatures_4 = signatures; _i < signatures_4.length; _i++) {
+                var signature = signatures_4[_i];
+                var symbol = signature.declaration && getSymbolOfNode(signature.declaration);
+                var parent_12 = signature.declaration && signature.declaration.parent;
+                if (!lastSymbol || symbol === lastSymbol) {
+                    if (lastParent && parent_12 === lastParent) {
+                        index++;
                     }
-                    if (related) {
-                        related &= eachPropertyRelatedTo(source, targetInfo.type, kind, reportErrors);
+                    else {
+                        lastParent = parent_12;
+                        index = cutoffIndex;
                     }
-                    return related;
                 }
-                if (reportErrors) {
-                    reportError(ts.Diagnostics.Index_signature_is_missing_in_type_0, typeToString(source));
+                else {
+                    // current declaration belongs to a different symbol
+                    // set cutoffIndex so re-orderings in the future won't change result set from 0 to cutoffIndex
+                    index = cutoffIndex = result.length;
+                    lastParent = parent_12;
                 }
-                return 0 /* False */;
-            }
-            function indexTypesIdenticalTo(source, target, indexKind) {
-                var targetInfo = getIndexInfoOfType(target, indexKind);
-                var sourceInfo = getIndexInfoOfType(source, indexKind);
-                if (!sourceInfo && !targetInfo) {
-                    return -1 /* True */;
+                lastSymbol = symbol;
+                // specialized signatures always need to be placed before non-specialized signatures regardless
+                // of the cutoff position; see GH#1133
+                if (signature.hasLiteralTypes) {
+                    specializedIndex++;
+                    spliceIndex = specializedIndex;
+                    // The cutoff index always needs to be greater than or equal to the specialized signature index
+                    // in order to prevent non-specialized signatures from being added before a specialized
+                    // signature.
+                    cutoffIndex++;
                 }
-                if (sourceInfo && targetInfo && sourceInfo.isReadonly === targetInfo.isReadonly) {
-                    return isRelatedTo(sourceInfo.type, targetInfo.type);
+                else {
+                    spliceIndex = index;
                 }
-                return 0 /* False */;
+                result.splice(spliceIndex, 0, signature);
             }
-            function constructorVisibilitiesAreCompatible(sourceSignature, targetSignature, reportErrors) {
-                if (!sourceSignature.declaration || !targetSignature.declaration) {
-                    return true;
-                }
-                var sourceAccessibility = ts.getModifierFlags(sourceSignature.declaration) & 24 /* NonPublicAccessibilityModifier */;
-                var targetAccessibility = ts.getModifierFlags(targetSignature.declaration) & 24 /* NonPublicAccessibilityModifier */;
-                // A public, protected and private signature is assignable to a private signature.
-                if (targetAccessibility === 8 /* Private */) {
-                    return true;
+        }
+        function getSpreadArgumentIndex(args) {
+            for (var i = 0; i < args.length; i++) {
+                var arg = args[i];
+                if (arg && arg.kind === 198 /* SpreadElement */) {
+                    return i;
                 }
-                // A public and protected signature is assignable to a protected signature.
-                if (targetAccessibility === 16 /* Protected */ && sourceAccessibility !== 8 /* Private */) {
-                    return true;
+            }
+            return -1;
+        }
+        function hasCorrectArity(node, args, signature, signatureHelpTrailingComma) {
+            if (signatureHelpTrailingComma === void 0) { signatureHelpTrailingComma = false; }
+            var argCount; // Apparent number of arguments we will have in this call
+            var typeArguments; // Type arguments (undefined if none)
+            var callIsIncomplete; // In incomplete call we want to be lenient when we have too few arguments
+            var isDecorator;
+            var spreadArgIndex = -1;
+            if (ts.isJsxOpeningLikeElement(node)) {
+                // The arity check will be done in "checkApplicableSignatureForJsxOpeningLikeElement".
+                return true;
+            }
+            if (node.kind === 183 /* TaggedTemplateExpression */) {
+                var tagExpression = node;
+                // Even if the call is incomplete, we'll have a missing expression as our last argument,
+                // so we can say the count is just the arg list length
+                argCount = args.length;
+                typeArguments = undefined;
+                if (tagExpression.template.kind === 196 /* TemplateExpression */) {
+                    // If a tagged template expression lacks a tail literal, the call is incomplete.
+                    // Specifically, a template only can end in a TemplateTail or a Missing literal.
+                    var templateExpression = tagExpression.template;
+                    var lastSpan = ts.lastOrUndefined(templateExpression.templateSpans);
+                    ts.Debug.assert(lastSpan !== undefined); // we should always have at least one span.
+                    callIsIncomplete = ts.nodeIsMissing(lastSpan.literal) || !!lastSpan.literal.isUnterminated;
                 }
-                // Only a public signature is assignable to public signature.
-                if (targetAccessibility !== 16 /* Protected */ && !sourceAccessibility) {
-                    return true;
+                else {
+                    // If the template didn't end in a backtick, or its beginning occurred right prior to EOF,
+                    // then this might actually turn out to be a TemplateHead in the future;
+                    // so we consider the call to be incomplete.
+                    var templateLiteral = tagExpression.template;
+                    ts.Debug.assert(templateLiteral.kind === 13 /* NoSubstitutionTemplateLiteral */);
+                    callIsIncomplete = !!templateLiteral.isUnterminated;
                 }
-                if (reportErrors) {
-                    reportError(ts.Diagnostics.Cannot_assign_a_0_constructor_type_to_a_1_constructor_type, visibilityToString(sourceAccessibility), visibilityToString(targetAccessibility));
+            }
+            else if (node.kind === 147 /* Decorator */) {
+                isDecorator = true;
+                typeArguments = undefined;
+                argCount = getEffectiveArgumentCount(node, /*args*/ undefined, signature);
+            }
+            else {
+                var callExpression = node;
+                if (!callExpression.arguments) {
+                    // This only happens when we have something of the form: 'new C'
+                    ts.Debug.assert(callExpression.kind === 182 /* NewExpression */);
+                    return signature.minArgumentCount === 0;
                 }
+                argCount = signatureHelpTrailingComma ? args.length + 1 : args.length;
+                // If we are missing the close parenthesis, the call is incomplete.
+                callIsIncomplete = callExpression.arguments.end === callExpression.end;
+                typeArguments = callExpression.typeArguments;
+                spreadArgIndex = getSpreadArgumentIndex(args);
+            }
+            // If the user supplied type arguments, but the number of type arguments does not match
+            // the declared number of type parameters, the call has an incorrect arity.
+            var numTypeParameters = ts.length(signature.typeParameters);
+            var minTypeArgumentCount = getMinTypeArgumentCount(signature.typeParameters);
+            var hasRightNumberOfTypeArgs = !typeArguments ||
+                (typeArguments.length >= minTypeArgumentCount && typeArguments.length <= numTypeParameters);
+            if (!hasRightNumberOfTypeArgs) {
                 return false;
             }
-        }
-        // Return true if the given type is the constructor type for an abstract class
-        function isAbstractConstructorType(type) {
-            if (type.flags & 2097152 /* Anonymous */) {
-                var symbol = type.symbol;
-                if (symbol && symbol.flags & 32 /* Class */) {
-                    var declaration = getClassLikeDeclarationOfSymbol(symbol);
-                    if (declaration && ts.getModifierFlags(declaration) & 128 /* Abstract */) {
-                        return true;
-                    }
-                }
+            // If spread arguments are present, check that they correspond to a rest parameter. If so, no
+            // further checking is necessary.
+            if (spreadArgIndex >= 0) {
+                return isRestParameterIndex(signature, spreadArgIndex) || spreadArgIndex >= signature.minArgumentCount;
             }
-            return false;
+            // Too many arguments implies incorrect arity.
+            if (!signature.hasRestParameter && argCount > signature.parameters.length) {
+                return false;
+            }
+            // If the call is incomplete, we should skip the lower bound check.
+            var hasEnoughArguments = argCount >= signature.minArgumentCount;
+            return callIsIncomplete || hasEnoughArguments;
         }
-        // Return true if the given type is part of a deeply nested chain of generic instantiations. We consider this to be the case
-        // when structural type comparisons have been started for 10 or more instantiations of the same generic type. It is possible,
-        // though highly unlikely, for this test to be true in a situation where a chain of instantiations is not infinitely expanding.
-        // Effectively, we will generate a false positive when two types are structurally equal to at least 10 levels, but unequal at
-        // some level beyond that.
-        function isDeeplyNestedGeneric(type, stack, depth) {
-            // We track type references (created by createTypeReference) and instantiated types (created by instantiateType)
-            if (type.flags & (131072 /* Reference */ | 4194304 /* Instantiated */) && depth >= 5) {
-                var symbol = type.symbol;
-                var count = 0;
-                for (var i = 0; i < depth; i++) {
-                    var t = stack[i];
-                    if (t.flags & (131072 /* Reference */ | 4194304 /* Instantiated */) && t.symbol === symbol) {
-                        count++;
-                        if (count >= 5)
-                            return true;
-                    }
+        // If type has a single call signature and no other members, return that signature. Otherwise, return undefined.
+        function getSingleCallSignature(type) {
+            if (type.flags & 32768 /* Object */) {
+                var resolved = resolveStructuredTypeMembers(type);
+                if (resolved.callSignatures.length === 1 && resolved.constructSignatures.length === 0 &&
+                    resolved.properties.length === 0 && !resolved.stringIndexInfo && !resolved.numberIndexInfo) {
+                    return resolved.callSignatures[0];
                 }
             }
-            return false;
-        }
-        function isPropertyIdenticalTo(sourceProp, targetProp) {
-            return compareProperties(sourceProp, targetProp, compareTypesIdentical) !== 0 /* False */;
+            return undefined;
         }
-        function compareProperties(sourceProp, targetProp, compareTypes) {
-            // Two members are considered identical when
-            // - they are public properties with identical names, optionality, and types,
-            // - they are private or protected properties originating in the same declaration and having identical types
-            if (sourceProp === targetProp) {
-                return -1 /* True */;
+        // Instantiate a generic signature in the context of a non-generic signature (section 3.8.5 in TypeScript spec)
+        function instantiateSignatureInContextOf(signature, contextualSignature, contextualMapper) {
+            var context = createInferenceContext(signature, 1 /* InferUnionTypes */);
+            forEachMatchingParameterType(contextualSignature, signature, function (source, target) {
+                // Type parameters from outer context referenced by source type are fixed by instantiation of the source type
+                inferTypes(context.inferences, instantiateType(source, contextualMapper || identityMapper), target);
+            });
+            if (!contextualMapper) {
+                inferTypes(context.inferences, getReturnTypeOfSignature(contextualSignature), getReturnTypeOfSignature(signature), 4 /* ReturnType */);
             }
-            var sourcePropAccessibility = getDeclarationModifierFlagsFromSymbol(sourceProp) & 24 /* NonPublicAccessibilityModifier */;
-            var targetPropAccessibility = getDeclarationModifierFlagsFromSymbol(targetProp) & 24 /* NonPublicAccessibilityModifier */;
-            if (sourcePropAccessibility !== targetPropAccessibility) {
-                return 0 /* False */;
+            return getSignatureInstantiation(signature, getInferredTypes(context));
+        }
+        function inferTypeArguments(node, signature, args, excludeArgument, context) {
+            var inferences = context.inferences;
+            // Clear out all the inference results from the last time inferTypeArguments was called on this context
+            for (var i = 0; i < inferences.length; i++) {
+                // As an optimization, we don't have to clear (and later recompute) inferred types
+                // for type parameters that have already been fixed on the previous call to inferTypeArguments.
+                // It would be just as correct to reset all of them. But then we'd be repeating the same work
+                // for the type parameters that were fixed, namely the work done by getInferredType.
+                if (!inferences[i].isFixed) {
+                    inferences[i].inferredType = undefined;
+                }
             }
-            if (sourcePropAccessibility) {
-                if (getTargetSymbol(sourceProp) !== getTargetSymbol(targetProp)) {
-                    return 0 /* False */;
+            // If a contextual type is available, infer from that type to the return type of the call expression. For
+            // example, given a 'function wrap<T, U>(cb: (x: T) => U): (x: T) => U' and a call expression
+            // 'let f: (x: string) => number = wrap(s => s.length)', we infer from the declared type of 'f' to the
+            // return type of 'wrap'.
+            if (ts.isExpression(node)) {
+                var contextualType = getContextualType(node);
+                if (contextualType) {
+                    // We clone the contextual mapper to avoid disturbing a resolution in progress for an
+                    // outer call expression. Effectively we just want a snapshot of whatever has been
+                    // inferred for any outer call expression so far.
+                    var instantiatedType = instantiateType(contextualType, cloneTypeMapper(getContextualMapper(node)));
+                    // If the contextual type is a generic function type with a single call signature, we
+                    // instantiate the type with its own type parameters and type arguments. This ensures that
+                    // the type parameters are not erased to type any during type inference such that they can
+                    // be inferred as actual types from the contextual type. For example:
+                    //   declare function arrayMap<T, U>(f: (x: T) => U): (a: T[]) => U[];
+                    //   const boxElements: <A>(a: A[]) => { value: A }[] = arrayMap(value => ({ value }));
+                    // Above, the type of the 'value' parameter is inferred to be 'A'.
+                    var contextualSignature = getSingleCallSignature(instantiatedType);
+                    var inferenceSourceType = contextualSignature && contextualSignature.typeParameters ?
+                        getOrCreateTypeFromSignature(getSignatureInstantiation(contextualSignature, contextualSignature.typeParameters)) :
+                        instantiatedType;
+                    var inferenceTargetType = getReturnTypeOfSignature(signature);
+                    // Inferences made from return types have lower priority than all other inferences.
+                    inferTypes(context.inferences, inferenceSourceType, inferenceTargetType, 4 /* ReturnType */);
                 }
             }
-            else {
-                if ((sourceProp.flags & 536870912 /* Optional */) !== (targetProp.flags & 536870912 /* Optional */)) {
-                    return 0 /* False */;
+            var thisType = getThisTypeOfSignature(signature);
+            if (thisType) {
+                var thisArgumentNode = getThisArgumentOfCall(node);
+                var thisArgumentType = thisArgumentNode ? checkExpression(thisArgumentNode) : voidType;
+                inferTypes(context.inferences, thisArgumentType, thisType);
+            }
+            // We perform two passes over the arguments. In the first pass we infer from all arguments, but use
+            // wildcards for all context sensitive function expressions.
+            var argCount = getEffectiveArgumentCount(node, args, signature);
+            for (var i = 0; i < argCount; i++) {
+                var arg = getEffectiveArgument(node, args, i);
+                // If the effective argument is 'undefined', then it is an argument that is present but is synthetic.
+                if (arg === undefined || arg.kind !== 200 /* OmittedExpression */) {
+                    var paramType = getTypeAtPosition(signature, i);
+                    var argType = getEffectiveArgumentType(node, i);
+                    // If the effective argument type is 'undefined', there is no synthetic type
+                    // for the argument. In that case, we should check the argument.
+                    if (argType === undefined) {
+                        // For context sensitive arguments we pass the identityMapper, which is a signal to treat all
+                        // context sensitive function expressions as wildcards
+                        var mapper = excludeArgument && excludeArgument[i] !== undefined ? identityMapper : context;
+                        argType = checkExpressionWithContextualType(arg, paramType, mapper);
+                    }
+                    inferTypes(context.inferences, argType, paramType);
                 }
             }
-            if (isReadonlySymbol(sourceProp) !== isReadonlySymbol(targetProp)) {
-                return 0 /* False */;
+            // In the second pass we visit only context sensitive arguments, and only those that aren't excluded, this
+            // time treating function expressions normally (which may cause previously inferred type arguments to be fixed
+            // as we construct types for contextually typed parameters)
+            // Decorators will not have `excludeArgument`, as their arguments cannot be contextually typed.
+            // Tagged template expressions will always have `undefined` for `excludeArgument[0]`.
+            if (excludeArgument) {
+                for (var i = 0; i < argCount; i++) {
+                    // No need to check for omitted args and template expressions, their exclusion value is always undefined
+                    if (excludeArgument[i] === false) {
+                        var arg = args[i];
+                        var paramType = getTypeAtPosition(signature, i);
+                        inferTypes(context.inferences, checkExpressionWithContextualType(arg, paramType, context), paramType);
+                    }
+                }
             }
-            return compareTypes(getTypeOfSymbol(sourceProp), getTypeOfSymbol(targetProp));
+            return getInferredTypes(context);
         }
-        function isMatchingSignature(source, target, partialMatch) {
-            // A source signature matches a target signature if the two signatures have the same number of required,
-            // optional, and rest parameters.
-            if (source.parameters.length === target.parameters.length &&
-                source.minArgumentCount === target.minArgumentCount &&
-                source.hasRestParameter === target.hasRestParameter) {
-                return true;
-            }
-            // A source signature partially matches a target signature if the target signature has no fewer required
-            // parameters and no more overall parameters than the source signature (where a signature with a rest
-            // parameter is always considered to have more overall parameters than one without).
-            var sourceRestCount = source.hasRestParameter ? 1 : 0;
-            var targetRestCount = target.hasRestParameter ? 1 : 0;
-            if (partialMatch && source.minArgumentCount <= target.minArgumentCount && (sourceRestCount > targetRestCount ||
-                sourceRestCount === targetRestCount && source.parameters.length >= target.parameters.length)) {
-                return true;
+        function checkTypeArguments(signature, typeArgumentNodes, typeArgumentTypes, reportErrors, headMessage) {
+            var typeParameters = signature.typeParameters;
+            var typeArgumentsAreAssignable = true;
+            var mapper;
+            for (var i = 0; i < typeArgumentNodes.length; i++) {
+                if (typeArgumentsAreAssignable /* so far */) {
+                    var constraint = getConstraintOfTypeParameter(typeParameters[i]);
+                    if (constraint) {
+                        var errorInfo = void 0;
+                        var typeArgumentHeadMessage = ts.Diagnostics.Type_0_does_not_satisfy_the_constraint_1;
+                        if (reportErrors && headMessage) {
+                            errorInfo = ts.chainDiagnosticMessages(errorInfo, typeArgumentHeadMessage);
+                            typeArgumentHeadMessage = headMessage;
+                        }
+                        if (!mapper) {
+                            mapper = createTypeMapper(typeParameters, typeArgumentTypes);
+                        }
+                        var typeArgument = typeArgumentTypes[i];
+                        typeArgumentsAreAssignable = checkTypeAssignableTo(typeArgument, getTypeWithThisArgument(instantiateType(constraint, mapper), typeArgument), reportErrors ? typeArgumentNodes[i] : undefined, typeArgumentHeadMessage, errorInfo);
+                    }
+                }
             }
-            return false;
+            return typeArgumentsAreAssignable;
         }
         /**
-         * See signatureRelatedTo, compareSignaturesIdentical
+         * Check if the given signature can possibly be a signature called by the JSX opening-like element.
+         * @param node a JSX opening-like element we are trying to figure its call signature
+         * @param signature a candidate signature we are trying whether it is a call signature
+         * @param relation a relationship to check parameter and argument type
+         * @param excludeArgument
          */
-        function compareSignaturesIdentical(source, target, partialMatch, ignoreThisTypes, ignoreReturnTypes, compareTypes) {
-            // TODO (drosen): De-duplicate code between related functions.
-            if (source === target) {
-                return -1 /* True */;
+        function checkApplicableSignatureForJsxOpeningLikeElement(node, signature, relation) {
+            // JSX opening-like element has correct arity for stateless-function component if the one of the following condition is true:
+            //      1. callIsIncomplete
+            //      2. attributes property has same number of properties as the parameter object type.
+            //         We can figure that out by resolving attributes property and check number of properties in the resolved type
+            // If the call has correct arity, we will then check if the argument type and parameter type is assignable
+            var callIsIncomplete = node.attributes.end === node.end; // If we are missing the close "/>", the call is incomplete
+            if (callIsIncomplete) {
+                return true;
             }
-            if (!(isMatchingSignature(source, target, partialMatch))) {
-                return 0 /* False */;
+            var headMessage = ts.Diagnostics.Argument_of_type_0_is_not_assignable_to_parameter_of_type_1;
+            // Stateless function components can have maximum of three arguments: "props", "context", and "updater".
+            // However "context" and "updater" are implicit and can't be specify by users. Only the first parameter, props,
+            // can be specified by users through attributes property.
+            var paramType = getTypeAtPosition(signature, 0);
+            var attributesType = checkExpressionWithContextualType(node.attributes, paramType, /*contextualMapper*/ undefined);
+            var argProperties = getPropertiesOfType(attributesType);
+            for (var _i = 0, argProperties_1 = argProperties; _i < argProperties_1.length; _i++) {
+                var arg = argProperties_1[_i];
+                if (!getPropertyOfType(paramType, arg.name) && isUnhyphenatedJsxName(arg.name)) {
+                    return false;
+                }
             }
-            // Check that the two signatures have the same number of type parameters. We might consider
-            // also checking that any type parameter constraints match, but that would require instantiating
-            // the constraints with a common set of type arguments to get relatable entities in places where
-            // type parameters occur in the constraints. The complexity of doing that doesn't seem worthwhile,
-            // particularly as we're comparing erased versions of the signatures below.
-            if ((source.typeParameters ? source.typeParameters.length : 0) !== (target.typeParameters ? target.typeParameters.length : 0)) {
-                return 0 /* False */;
+            return checkTypeRelatedTo(attributesType, paramType, relation, /*errorNode*/ undefined, headMessage);
+        }
+        function checkApplicableSignature(node, args, signature, relation, excludeArgument, reportErrors) {
+            if (ts.isJsxOpeningLikeElement(node)) {
+                return checkApplicableSignatureForJsxOpeningLikeElement(node, signature, relation);
             }
-            // Spec 1.0 Section 3.8.3 & 3.8.4:
-            // M and N (the signatures) are instantiated using type Any as the type argument for all type parameters declared by M and N
-            source = getErasedSignature(source);
-            target = getErasedSignature(target);
-            var result = -1 /* True */;
-            if (!ignoreThisTypes) {
-                var sourceThisType = getThisTypeOfSignature(source);
-                if (sourceThisType) {
-                    var targetThisType = getThisTypeOfSignature(target);
-                    if (targetThisType) {
-                        var related = compareTypes(sourceThisType, targetThisType);
-                        if (!related) {
-                            return 0 /* False */;
-                        }
-                        result &= related;
+            var thisType = getThisTypeOfSignature(signature);
+            if (thisType && thisType !== voidType && node.kind !== 182 /* NewExpression */) {
+                // If the called expression is not of the form `x.f` or `x["f"]`, then sourceType = voidType
+                // If the signature's 'this' type is voidType, then the check is skipped -- anything is compatible.
+                // If the expression is a new expression, then the check is skipped.
+                var thisArgumentNode = getThisArgumentOfCall(node);
+                var thisArgumentType = thisArgumentNode ? checkExpression(thisArgumentNode) : voidType;
+                var errorNode = reportErrors ? (thisArgumentNode || node) : undefined;
+                var headMessage_1 = ts.Diagnostics.The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1;
+                if (!checkTypeRelatedTo(thisArgumentType, getThisTypeOfSignature(signature), relation, errorNode, headMessage_1)) {
+                    return false;
+                }
+            }
+            var headMessage = ts.Diagnostics.Argument_of_type_0_is_not_assignable_to_parameter_of_type_1;
+            var argCount = getEffectiveArgumentCount(node, args, signature);
+            for (var i = 0; i < argCount; i++) {
+                var arg = getEffectiveArgument(node, args, i);
+                // If the effective argument is 'undefined', then it is an argument that is present but is synthetic.
+                if (arg === undefined || arg.kind !== 200 /* OmittedExpression */) {
+                    // Check spread elements against rest type (from arity check we know spread argument corresponds to a rest parameter)
+                    var paramType = getTypeAtPosition(signature, i);
+                    var argType = getEffectiveArgumentType(node, i);
+                    // If the effective argument type is 'undefined', there is no synthetic type
+                    // for the argument. In that case, we should check the argument.
+                    if (argType === undefined) {
+                        argType = checkExpressionWithContextualType(arg, paramType, excludeArgument && excludeArgument[i] ? identityMapper : undefined);
+                    }
+                    // Use argument expression as error location when reporting errors
+                    var errorNode = reportErrors ? getEffectiveArgumentErrorNode(node, i, arg) : undefined;
+                    if (!checkTypeRelatedTo(argType, paramType, relation, errorNode, headMessage)) {
+                        return false;
                     }
                 }
             }
-            var targetLen = target.parameters.length;
-            for (var i = 0; i < targetLen; i++) {
-                var s = isRestParameterIndex(source, i) ? getRestTypeOfSignature(source) : getTypeOfParameter(source.parameters[i]);
-                var t = isRestParameterIndex(target, i) ? getRestTypeOfSignature(target) : getTypeOfParameter(target.parameters[i]);
-                var related = compareTypes(s, t);
-                if (!related) {
-                    return 0 /* False */;
+            return true;
+        }
+        /**
+         * Returns the this argument in calls like x.f(...) and x[f](...). Undefined otherwise.
+         */
+        function getThisArgumentOfCall(node) {
+            if (node.kind === 181 /* CallExpression */) {
+                var callee = node.expression;
+                if (callee.kind === 179 /* PropertyAccessExpression */) {
+                    return callee.expression;
+                }
+                else if (callee.kind === 180 /* ElementAccessExpression */) {
+                    return callee.expression;
                 }
-                result &= related;
             }
-            if (!ignoreReturnTypes) {
-                result &= compareTypes(getReturnTypeOfSignature(source), getReturnTypeOfSignature(target));
+        }
+        /**
+         * Returns the effective arguments for an expression that works like a function invocation.
+         *
+         * If 'node' is a CallExpression or a NewExpression, then its argument list is returned.
+         * If 'node' is a TaggedTemplateExpression, a new argument list is constructed from the substitution
+         *    expressions, where the first element of the list is `undefined`.
+         * If 'node' is a Decorator, the argument list will be `undefined`, and its arguments and types
+         *    will be supplied from calls to `getEffectiveArgumentCount` and `getEffectiveArgumentType`.
+         */
+        function getEffectiveCallArguments(node) {
+            var args;
+            if (node.kind === 183 /* TaggedTemplateExpression */) {
+                var template = node.template;
+                args = [undefined];
+                if (template.kind === 196 /* TemplateExpression */) {
+                    ts.forEach(template.templateSpans, function (span) {
+                        args.push(span.expression);
+                    });
+                }
             }
-            return result;
+            else if (node.kind === 147 /* Decorator */) {
+                // For a decorator, we return undefined as we will determine
+                // the number and types of arguments for a decorator using
+                // `getEffectiveArgumentCount` and `getEffectiveArgumentType` below.
+                return undefined;
+            }
+            else if (ts.isJsxOpeningLikeElement(node)) {
+                args = node.attributes.properties.length > 0 ? [node.attributes] : emptyArray;
+            }
+            else {
+                args = node.arguments || emptyArray;
+            }
+            return args;
         }
-        function isRestParameterIndex(signature, parameterIndex) {
-            return signature.hasRestParameter && parameterIndex >= signature.parameters.length - 1;
+        /**
+         * Returns the effective argument count for a node that works like a function invocation.
+         * If 'node' is a Decorator, the number of arguments is derived from the decoration
+         *    target and the signature:
+         *    If 'node.target' is a class declaration or class expression, the effective argument
+         *       count is 1.
+         *    If 'node.target' is a parameter declaration, the effective argument count is 3.
+         *    If 'node.target' is a property declaration, the effective argument count is 2.
+         *    If 'node.target' is a method or accessor declaration, the effective argument count
+         *       is 3, although it can be 2 if the signature only accepts two arguments, allowing
+         *       us to match a property decorator.
+         * Otherwise, the argument count is the length of the 'args' array.
+         */
+        function getEffectiveArgumentCount(node, args, signature) {
+            if (node.kind === 147 /* Decorator */) {
+                switch (node.parent.kind) {
+                    case 229 /* ClassDeclaration */:
+                    case 199 /* ClassExpression */:
+                        // A class decorator will have one argument (see `ClassDecorator` in core.d.ts)
+                        return 1;
+                    case 149 /* PropertyDeclaration */:
+                        // A property declaration decorator will have two arguments (see
+                        // `PropertyDecorator` in core.d.ts)
+                        return 2;
+                    case 151 /* MethodDeclaration */:
+                    case 153 /* GetAccessor */:
+                    case 154 /* SetAccessor */:
+                        // A method or accessor declaration decorator will have two or three arguments (see
+                        // `PropertyDecorator` and `MethodDecorator` in core.d.ts)
+                        // If we are emitting decorators for ES3, we will only pass two arguments.
+                        if (languageVersion === 0 /* ES3 */) {
+                            return 2;
+                        }
+                        // If the method decorator signature only accepts a target and a key, we will only
+                        // type check those arguments.
+                        return signature.parameters.length >= 3 ? 3 : 2;
+                    case 146 /* Parameter */:
+                        // A parameter declaration decorator will have three arguments (see
+                        // `ParameterDecorator` in core.d.ts)
+                        return 3;
+                }
+            }
+            else {
+                return args.length;
+            }
         }
-        function isSupertypeOfEach(candidate, types) {
-            for (var _i = 0, types_7 = types; _i < types_7.length; _i++) {
-                var t = types_7[_i];
-                if (candidate !== t && !isTypeSubtypeOf(t, candidate))
-                    return false;
+        /**
+         * Returns the effective type of the first argument to a decorator.
+         * If 'node' is a class declaration or class expression, the effective argument type
+         *    is the type of the static side of the class.
+         * If 'node' is a parameter declaration, the effective argument type is either the type
+         *    of the static or instance side of the class for the parameter's parent method,
+         *    depending on whether the method is declared static.
+         *    For a constructor, the type is always the type of the static side of the class.
+         * If 'node' is a property, method, or accessor declaration, the effective argument
+         *    type is the type of the static or instance side of the parent class for class
+         *    element, depending on whether the element is declared static.
+         */
+        function getEffectiveDecoratorFirstArgumentType(node) {
+            // The first argument to a decorator is its `target`.
+            if (node.kind === 229 /* ClassDeclaration */) {
+                // For a class decorator, the `target` is the type of the class (e.g. the
+                // "static" or "constructor" side of the class)
+                var classSymbol = getSymbolOfNode(node);
+                return getTypeOfSymbol(classSymbol);
             }
-            return true;
-        }
-        function literalTypesWithSameBaseType(types) {
-            var commonBaseType;
-            for (var _i = 0, types_8 = types; _i < types_8.length; _i++) {
-                var t = types_8[_i];
-                var baseType = getBaseTypeOfLiteralType(t);
-                if (!commonBaseType) {
-                    commonBaseType = baseType;
-                }
-                if (baseType === t || baseType !== commonBaseType) {
-                    return false;
+            if (node.kind === 146 /* Parameter */) {
+                // For a parameter decorator, the `target` is the parent type of the
+                // parameter's containing method.
+                node = node.parent;
+                if (node.kind === 152 /* Constructor */) {
+                    var classSymbol = getSymbolOfNode(node);
+                    return getTypeOfSymbol(classSymbol);
                 }
             }
-            return true;
-        }
-        // When the candidate types are all literal types with the same base type, the common
-        // supertype is a union of those literal types. Otherwise, the common supertype is the
-        // first type that is a supertype of each of the other types.
-        function getSupertypeOrUnion(types) {
-            return literalTypesWithSameBaseType(types) ? getUnionType(types) : ts.forEach(types, function (t) { return isSupertypeOfEach(t, types) ? t : undefined; });
+            if (node.kind === 149 /* PropertyDeclaration */ ||
+                node.kind === 151 /* MethodDeclaration */ ||
+                node.kind === 153 /* GetAccessor */ ||
+                node.kind === 154 /* SetAccessor */) {
+                // For a property or method decorator, the `target` is the
+                // "static"-side type of the parent of the member if the member is
+                // declared "static"; otherwise, it is the "instance"-side type of the
+                // parent of the member.
+                return getParentTypeOfClassElement(node);
+            }
+            ts.Debug.fail("Unsupported decorator target.");
+            return unknownType;
         }
-        function getCommonSupertype(types) {
-            if (!strictNullChecks) {
-                return getSupertypeOrUnion(types);
+        /**
+         * Returns the effective type for the second argument to a decorator.
+         * If 'node' is a parameter, its effective argument type is one of the following:
+         *    If 'node.parent' is a constructor, the effective argument type is 'any', as we
+         *       will emit `undefined`.
+         *    If 'node.parent' is a member with an identifier, numeric, or string literal name,
+         *       the effective argument type will be a string literal type for the member name.
+         *    If 'node.parent' is a computed property name, the effective argument type will
+         *       either be a symbol type or the string type.
+         * If 'node' is a member with an identifier, numeric, or string literal name, the
+         *    effective argument type will be a string literal type for the member name.
+         * If 'node' is a computed property name, the effective argument type will either
+         *    be a symbol type or the string type.
+         * A class decorator does not have a second argument type.
+         */
+        function getEffectiveDecoratorSecondArgumentType(node) {
+            // The second argument to a decorator is its `propertyKey`
+            if (node.kind === 229 /* ClassDeclaration */) {
+                ts.Debug.fail("Class decorators should not have a second synthetic argument.");
+                return unknownType;
             }
-            var primaryTypes = ts.filter(types, function (t) { return !(t.flags & 6144 /* Nullable */); });
-            if (!primaryTypes.length) {
-                return getUnionType(types, /*subtypeReduction*/ true);
-            }
-            var supertype = getSupertypeOrUnion(primaryTypes);
-            return supertype && includeFalsyTypes(supertype, getFalsyFlagsOfTypes(types) & 6144 /* Nullable */);
-        }
-        function reportNoCommonSupertypeError(types, errorLocation, errorMessageChainHead) {
-            // The downfallType/bestSupertypeDownfallType is the first type that caused a particular candidate
-            // to not be the common supertype. So if it weren't for this one downfallType (and possibly others),
-            // the type in question could have been the common supertype.
-            var bestSupertype;
-            var bestSupertypeDownfallType;
-            var bestSupertypeScore = 0;
-            for (var i = 0; i < types.length; i++) {
-                var score = 0;
-                var downfallType = undefined;
-                for (var j = 0; j < types.length; j++) {
-                    if (isTypeSubtypeOf(types[j], types[i])) {
-                        score++;
-                    }
-                    else if (!downfallType) {
-                        downfallType = types[j];
-                    }
-                }
-                ts.Debug.assert(!!downfallType, "If there is no common supertype, each type should have a downfallType");
-                if (score > bestSupertypeScore) {
-                    bestSupertype = types[i];
-                    bestSupertypeDownfallType = downfallType;
-                    bestSupertypeScore = score;
+            if (node.kind === 146 /* Parameter */) {
+                node = node.parent;
+                if (node.kind === 152 /* Constructor */) {
+                    // For a constructor parameter decorator, the `propertyKey` will be `undefined`.
+                    return anyType;
                 }
-                // types.length - 1 is the maximum score, given that getCommonSupertype returned false
-                if (bestSupertypeScore === types.length - 1) {
-                    break;
+                // For a non-constructor parameter decorator, the `propertyKey` will be either
+                // a string or a symbol, based on the name of the parameter's containing method.
+            }
+            if (node.kind === 149 /* PropertyDeclaration */ ||
+                node.kind === 151 /* MethodDeclaration */ ||
+                node.kind === 153 /* GetAccessor */ ||
+                node.kind === 154 /* SetAccessor */) {
+                // The `propertyKey` for a property or method decorator will be a
+                // string literal type if the member name is an identifier, number, or string;
+                // otherwise, if the member name is a computed property name it will
+                // be either string or symbol.
+                var element = node;
+                switch (element.name.kind) {
+                    case 71 /* Identifier */:
+                    case 8 /* NumericLiteral */:
+                    case 9 /* StringLiteral */:
+                        return getLiteralType(element.name.text);
+                    case 144 /* ComputedPropertyName */:
+                        var nameType = checkComputedPropertyName(element.name);
+                        if (isTypeOfKind(nameType, 512 /* ESSymbol */)) {
+                            return nameType;
+                        }
+                        else {
+                            return stringType;
+                        }
+                    default:
+                        ts.Debug.fail("Unsupported property name.");
+                        return unknownType;
                 }
             }
-            // In the following errors, the {1} slot is before the {0} slot because checkTypeSubtypeOf supplies the
-            // subtype as the first argument to the error
-            checkTypeSubtypeOf(bestSupertypeDownfallType, bestSupertype, errorLocation, ts.Diagnostics.Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0, errorMessageChainHead);
-        }
-        function isArrayType(type) {
-            return type.flags & 131072 /* Reference */ && type.target === globalArrayType;
-        }
-        function isArrayLikeType(type) {
-            // A type is array-like if it is a reference to the global Array or global ReadonlyArray type,
-            // or if it is not the undefined or null type and if it is assignable to ReadonlyArray<any>
-            return type.flags & 131072 /* Reference */ && (type.target === globalArrayType || type.target === globalReadonlyArrayType) ||
-                !(type.flags & 6144 /* Nullable */) && isTypeAssignableTo(type, anyReadonlyArrayType);
-        }
-        function isTupleLikeType(type) {
-            return !!getPropertyOfType(type, "0");
-        }
-        function isUnitType(type) {
-            return (type.flags & (480 /* Literal */ | 2048 /* Undefined */ | 4096 /* Null */)) !== 0;
-        }
-        function isLiteralType(type) {
-            return type.flags & 8 /* Boolean */ ? true :
-                type.flags & 524288 /* Union */ ? type.flags & 16 /* Enum */ ? true : !ts.forEach(type.types, function (t) { return !isUnitType(t); }) :
-                    isUnitType(type);
-        }
-        function getBaseTypeOfLiteralType(type) {
-            return type.flags & 32 /* StringLiteral */ ? stringType :
-                type.flags & 64 /* NumberLiteral */ ? numberType :
-                    type.flags & 128 /* BooleanLiteral */ ? booleanType :
-                        type.flags & 256 /* EnumLiteral */ ? type.baseType :
-                            type.flags & 524288 /* Union */ && !(type.flags & 16 /* Enum */) ? getUnionType(ts.map(type.types, getBaseTypeOfLiteralType)) :
-                                type;
-        }
-        function getWidenedLiteralType(type) {
-            return type.flags & 32 /* StringLiteral */ && type.flags & 16777216 /* FreshLiteral */ ? stringType :
-                type.flags & 64 /* NumberLiteral */ && type.flags & 16777216 /* FreshLiteral */ ? numberType :
-                    type.flags & 128 /* BooleanLiteral */ ? booleanType :
-                        type.flags & 256 /* EnumLiteral */ ? type.baseType :
-                            type.flags & 524288 /* Union */ && !(type.flags & 16 /* Enum */) ? getUnionType(ts.map(type.types, getWidenedLiteralType)) :
-                                type;
+            ts.Debug.fail("Unsupported decorator target.");
+            return unknownType;
         }
         /**
-         * Check if a Type was written as a tuple type literal.
-         * Prefer using isTupleLikeType() unless the use of `elementTypes` is required.
+         * Returns the effective argument type for the third argument to a decorator.
+         * If 'node' is a parameter, the effective argument type is the number type.
+         * If 'node' is a method or accessor, the effective argument type is a
+         *    `TypedPropertyDescriptor<T>` instantiated with the type of the member.
+         * Class and property decorators do not have a third effective argument.
          */
-        function isTupleType(type) {
-            return !!(type.flags & 131072 /* Reference */ && type.target.flags & 262144 /* Tuple */);
-        }
-        function getFalsyFlagsOfTypes(types) {
-            var result = 0;
-            for (var _i = 0, types_9 = types; _i < types_9.length; _i++) {
-                var t = types_9[_i];
-                result |= getFalsyFlags(t);
+        function getEffectiveDecoratorThirdArgumentType(node) {
+            // The third argument to a decorator is either its `descriptor` for a method decorator
+            // or its `parameterIndex` for a parameter decorator
+            if (node.kind === 229 /* ClassDeclaration */) {
+                ts.Debug.fail("Class decorators should not have a third synthetic argument.");
+                return unknownType;
             }
-            return result;
-        }
-        // Returns the String, Number, Boolean, StringLiteral, NumberLiteral, BooleanLiteral, Void, Undefined, or Null
-        // flags for the string, number, boolean, "", 0, false, void, undefined, or null types respectively. Returns
-        // no flags for all other types (including non-falsy literal types).
-        function getFalsyFlags(type) {
-            return type.flags & 524288 /* Union */ ? getFalsyFlagsOfTypes(type.types) :
-                type.flags & 32 /* StringLiteral */ ? type.text === "" ? 32 /* StringLiteral */ : 0 :
-                    type.flags & 64 /* NumberLiteral */ ? type.text === "0" ? 64 /* NumberLiteral */ : 0 :
-                        type.flags & 128 /* BooleanLiteral */ ? type === falseType ? 128 /* BooleanLiteral */ : 0 :
-                            type.flags & 7406 /* PossiblyFalsy */;
-        }
-        function includeFalsyTypes(type, flags) {
-            if ((getFalsyFlags(type) & flags) === flags) {
-                return type;
+            if (node.kind === 146 /* Parameter */) {
+                // The `parameterIndex` for a parameter decorator is always a number
+                return numberType;
             }
-            var types = [type];
-            if (flags & 34 /* StringLike */)
-                types.push(emptyStringType);
-            if (flags & 340 /* NumberLike */)
-                types.push(zeroType);
-            if (flags & 136 /* BooleanLike */)
-                types.push(falseType);
-            if (flags & 1024 /* Void */)
-                types.push(voidType);
-            if (flags & 2048 /* Undefined */)
-                types.push(undefinedType);
-            if (flags & 4096 /* Null */)
-                types.push(nullType);
-            return getUnionType(types, /*subtypeReduction*/ true);
-        }
-        function removeDefinitelyFalsyTypes(type) {
-            return getFalsyFlags(type) & 7392 /* DefinitelyFalsy */ ?
-                filterType(type, function (t) { return !(getFalsyFlags(t) & 7392 /* DefinitelyFalsy */); }) :
-                type;
-        }
-        function getNonNullableType(type) {
-            return strictNullChecks ? getTypeWithFacts(type, 524288 /* NEUndefinedOrNull */) : type;
+            if (node.kind === 149 /* PropertyDeclaration */) {
+                ts.Debug.fail("Property decorators should not have a third synthetic argument.");
+                return unknownType;
+            }
+            if (node.kind === 151 /* MethodDeclaration */ ||
+                node.kind === 153 /* GetAccessor */ ||
+                node.kind === 154 /* SetAccessor */) {
+                // The `descriptor` for a method decorator will be a `TypedPropertyDescriptor<T>`
+                // for the type of the member.
+                var propertyType = getTypeOfNode(node);
+                return createTypedPropertyDescriptorType(propertyType);
+            }
+            ts.Debug.fail("Unsupported decorator target.");
+            return unknownType;
         }
         /**
-         * Return true if type was inferred from an object literal or written as an object type literal
-         * with no call or construct signatures.
+         * Returns the effective argument type for the provided argument to a decorator.
          */
-        function isObjectLiteralType(type) {
-            return type.symbol && (type.symbol.flags & (4096 /* ObjectLiteral */ | 2048 /* TypeLiteral */)) !== 0 &&
-                getSignaturesOfType(type, 0 /* Call */).length === 0 &&
-                getSignaturesOfType(type, 1 /* Construct */).length === 0;
-        }
-        function createTransientSymbol(source, type) {
-            var symbol = createSymbol(source.flags | 67108864 /* Transient */, source.name);
-            symbol.declarations = source.declarations;
-            symbol.parent = source.parent;
-            symbol.type = type;
-            symbol.target = source;
-            if (source.valueDeclaration) {
-                symbol.valueDeclaration = source.valueDeclaration;
+        function getEffectiveDecoratorArgumentType(node, argIndex) {
+            if (argIndex === 0) {
+                return getEffectiveDecoratorFirstArgumentType(node.parent);
             }
-            return symbol;
-        }
-        function transformTypeOfMembers(type, f) {
-            var members = ts.createMap();
-            for (var _i = 0, _a = getPropertiesOfObjectType(type); _i < _a.length; _i++) {
-                var property = _a[_i];
-                var original = getTypeOfSymbol(property);
-                var updated = f(original);
-                members[property.name] = updated === original ? property : createTransientSymbol(property, updated);
+            else if (argIndex === 1) {
+                return getEffectiveDecoratorSecondArgumentType(node.parent);
             }
-            ;
-            return members;
+            else if (argIndex === 2) {
+                return getEffectiveDecoratorThirdArgumentType(node.parent);
+            }
+            ts.Debug.fail("Decorators should not have a fourth synthetic argument.");
+            return unknownType;
         }
         /**
-         * If the the provided object literal is subject to the excess properties check,
-         * create a new that is exempt. Recursively mark object literal members as exempt.
-         * Leave signatures alone since they are not subject to the check.
+         * Gets the effective argument type for an argument in a call expression.
          */
-        function getRegularTypeOfObjectLiteral(type) {
-            if (!(type.flags & 8388608 /* ObjectLiteral */ && type.flags & 16777216 /* FreshLiteral */)) {
-                return type;
+        function getEffectiveArgumentType(node, argIndex) {
+            // Decorators provide special arguments, a tagged template expression provides
+            // a special first argument, and string literals get string literal types
+            // unless we're reporting errors
+            if (node.kind === 147 /* Decorator */) {
+                return getEffectiveDecoratorArgumentType(node, argIndex);
             }
-            var regularType = type.regularType;
-            if (regularType) {
-                return regularType;
+            else if (argIndex === 0 && node.kind === 183 /* TaggedTemplateExpression */) {
+                return getGlobalTemplateStringsArrayType();
             }
-            var resolved = type;
-            var members = transformTypeOfMembers(type, getRegularTypeOfObjectLiteral);
-            var regularNew = createAnonymousType(resolved.symbol, members, resolved.callSignatures, resolved.constructSignatures, resolved.stringIndexInfo, resolved.numberIndexInfo);
-            regularNew.flags = resolved.flags & ~16777216 /* FreshLiteral */;
-            type.regularType = regularNew;
-            return regularNew;
-        }
-        function getWidenedTypeOfObjectLiteral(type) {
-            var members = transformTypeOfMembers(type, function (prop) {
-                var widened = getWidenedType(prop);
-                return prop === widened ? prop : widened;
-            });
-            var stringIndexInfo = getIndexInfoOfType(type, 0 /* String */);
-            var numberIndexInfo = getIndexInfoOfType(type, 1 /* Number */);
-            return createAnonymousType(type.symbol, members, emptyArray, emptyArray, stringIndexInfo && createIndexInfo(getWidenedType(stringIndexInfo.type), stringIndexInfo.isReadonly), numberIndexInfo && createIndexInfo(getWidenedType(numberIndexInfo.type), numberIndexInfo.isReadonly));
-        }
-        function getWidenedConstituentType(type) {
-            return type.flags & 6144 /* Nullable */ ? type : getWidenedType(type);
+            // This is not a synthetic argument, so we return 'undefined'
+            // to signal that the caller needs to check the argument.
+            return undefined;
         }
-        function getWidenedType(type) {
-            if (type.flags & 100663296 /* RequiresWidening */) {
-                if (type.flags & 6144 /* Nullable */) {
-                    return anyType;
-                }
-                if (type.flags & 8388608 /* ObjectLiteral */) {
-                    return getWidenedTypeOfObjectLiteral(type);
-                }
-                if (type.flags & 524288 /* Union */) {
-                    return getUnionType(ts.map(type.types, getWidenedConstituentType));
-                }
-                if (isArrayType(type) || isTupleType(type)) {
-                    return createTypeReference(type.target, ts.map(type.typeArguments, getWidenedType));
-                }
+        /**
+         * Gets the effective argument expression for an argument in a call expression.
+         */
+        function getEffectiveArgument(node, args, argIndex) {
+            // For a decorator or the first argument of a tagged template expression we return undefined.
+            if (node.kind === 147 /* Decorator */ ||
+                (argIndex === 0 && node.kind === 183 /* TaggedTemplateExpression */)) {
+                return undefined;
             }
-            return type;
+            return args[argIndex];
         }
         /**
-         * Reports implicit any errors that occur as a result of widening 'null' and 'undefined'
-         * to 'any'. A call to reportWideningErrorsInType is normally accompanied by a call to
-         * getWidenedType. But in some cases getWidenedType is called without reporting errors
-         * (type argument inference is an example).
-         *
-         * The return value indicates whether an error was in fact reported. The particular circumstances
-         * are on a best effort basis. Currently, if the null or undefined that causes widening is inside
-         * an object literal property (arbitrarily deeply), this function reports an error. If no error is
-         * reported, reportImplicitAnyError is a suitable fallback to report a general error.
+         * Gets the error node to use when reporting errors for an effective argument.
          */
-        function reportWideningErrorsInType(type) {
-            var errorReported = false;
-            if (type.flags & 524288 /* Union */) {
-                for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                    var t = _a[_i];
-                    if (reportWideningErrorsInType(t)) {
-                        errorReported = true;
-                    }
-                }
-            }
-            if (isArrayType(type) || isTupleType(type)) {
-                for (var _b = 0, _c = type.typeArguments; _b < _c.length; _b++) {
-                    var t = _c[_b];
-                    if (reportWideningErrorsInType(t)) {
-                        errorReported = true;
-                    }
-                }
+        function getEffectiveArgumentErrorNode(node, argIndex, arg) {
+            if (node.kind === 147 /* Decorator */) {
+                // For a decorator, we use the expression of the decorator for error reporting.
+                return node.expression;
             }
-            if (type.flags & 8388608 /* ObjectLiteral */) {
-                for (var _d = 0, _e = getPropertiesOfObjectType(type); _d < _e.length; _d++) {
-                    var p = _e[_d];
-                    var t = getTypeOfSymbol(p);
-                    if (t.flags & 33554432 /* ContainsWideningType */) {
-                        if (!reportWideningErrorsInType(t)) {
-                            error(p.valueDeclaration, ts.Diagnostics.Object_literal_s_property_0_implicitly_has_an_1_type, p.name, typeToString(getWidenedType(t)));
-                        }
-                        errorReported = true;
-                    }
-                }
+            else if (argIndex === 0 && node.kind === 183 /* TaggedTemplateExpression */) {
+                // For a the first argument of a tagged template expression, we use the template of the tag for error reporting.
+                return node.template;
             }
-            return errorReported;
-        }
-        function reportImplicitAnyError(declaration, type) {
-            var typeAsString = typeToString(getWidenedType(type));
-            var diagnostic;
-            switch (declaration.kind) {
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
-                    diagnostic = ts.Diagnostics.Member_0_implicitly_has_an_1_type;
-                    break;
-                case 142 /* Parameter */:
-                    diagnostic = declaration.dotDotDotToken ?
-                        ts.Diagnostics.Rest_parameter_0_implicitly_has_an_any_type :
-                        ts.Diagnostics.Parameter_0_implicitly_has_an_1_type;
-                    break;
-                case 169 /* BindingElement */:
-                    diagnostic = ts.Diagnostics.Binding_element_0_implicitly_has_an_1_type;
-                    break;
-                case 220 /* FunctionDeclaration */:
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                case 179 /* FunctionExpression */:
-                case 180 /* ArrowFunction */:
-                    if (!declaration.name) {
-                        error(declaration, ts.Diagnostics.Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type, typeAsString);
-                        return;
-                    }
-                    diagnostic = ts.Diagnostics._0_which_lacks_return_type_annotation_implicitly_has_an_1_return_type;
-                    break;
-                default:
-                    diagnostic = ts.Diagnostics.Variable_0_implicitly_has_an_1_type;
+            else {
+                return arg;
             }
-            error(declaration, diagnostic, ts.declarationNameToString(declaration.name), typeAsString);
         }
-        function reportErrorsFromWidening(declaration, type) {
-            if (produceDiagnostics && compilerOptions.noImplicitAny && type.flags & 33554432 /* ContainsWideningType */) {
-                // Report implicit any error within type if possible, otherwise report error on declaration
-                if (!reportWideningErrorsInType(type)) {
-                    reportImplicitAnyError(declaration, type);
+        function resolveCall(node, signatures, candidatesOutArray, fallbackError) {
+            var isTaggedTemplate = node.kind === 183 /* TaggedTemplateExpression */;
+            var isDecorator = node.kind === 147 /* Decorator */;
+            var isJsxOpeningOrSelfClosingElement = ts.isJsxOpeningLikeElement(node);
+            var typeArguments;
+            if (!isTaggedTemplate && !isDecorator && !isJsxOpeningOrSelfClosingElement) {
+                typeArguments = node.typeArguments;
+                // We already perform checking on the type arguments on the class declaration itself.
+                if (node.expression.kind !== 97 /* SuperKeyword */) {
+                    ts.forEach(typeArguments, checkSourceElement);
                 }
             }
-        }
-        function forEachMatchingParameterType(source, target, callback) {
-            var sourceMax = source.parameters.length;
-            var targetMax = target.parameters.length;
-            var count;
-            if (source.hasRestParameter && target.hasRestParameter) {
-                count = Math.max(sourceMax, targetMax);
-            }
-            else if (source.hasRestParameter) {
-                count = targetMax;
+            var candidates = candidatesOutArray || [];
+            // reorderCandidates fills up the candidates array directly
+            reorderCandidates(signatures, candidates);
+            if (!candidates.length) {
+                diagnostics.add(ts.createDiagnosticForNode(node, ts.Diagnostics.Call_target_does_not_contain_any_signatures));
+                return resolveErrorCall(node);
             }
-            else if (target.hasRestParameter) {
-                count = sourceMax;
+            var args = getEffectiveCallArguments(node);
+            // The following applies to any value of 'excludeArgument[i]':
+            //    - true:      the argument at 'i' is susceptible to a one-time permanent contextual typing.
+            //    - undefined: the argument at 'i' is *not* susceptible to permanent contextual typing.
+            //    - false:     the argument at 'i' *was* and *has been* permanently contextually typed.
+            //
+            // The idea is that we will perform type argument inference & assignability checking once
+            // without using the susceptible parameters that are functions, and once more for each of those
+            // parameters, contextually typing each as we go along.
+            //
+            // For a tagged template, then the first argument be 'undefined' if necessary
+            // because it represents a TemplateStringsArray.
+            //
+            // For a decorator, no arguments are susceptible to contextual typing due to the fact
+            // decorators are applied to a declaration by the emitter, and not to an expression.
+            var excludeArgument;
+            if (!isDecorator) {
+                // We do not need to call `getEffectiveArgumentCount` here as it only
+                // applies when calculating the number of arguments for a decorator.
+                for (var i = isTaggedTemplate ? 1 : 0; i < args.length; i++) {
+                    if (isContextSensitive(args[i])) {
+                        if (!excludeArgument) {
+                            excludeArgument = new Array(args.length);
+                        }
+                        excludeArgument[i] = true;
+                    }
+                }
             }
-            else {
-                count = Math.min(sourceMax, targetMax);
+            // The following variables are captured and modified by calls to chooseOverload.
+            // If overload resolution or type argument inference fails, we want to report the
+            // best error possible. The best error is one which says that an argument was not
+            // assignable to a parameter. This implies that everything else about the overload
+            // was fine. So if there is any overload that is only incorrect because of an
+            // argument, we will report an error on that one.
+            //
+            //     function foo(s: string): void;
+            //     function foo(n: number): void; // Report argument error on this overload
+            //     function foo(): void;
+            //     foo(true);
+            //
+            // If none of the overloads even made it that far, there are two possibilities.
+            // There was a problem with type arguments for some overload, in which case
+            // report an error on that. Or none of the overloads even had correct arity,
+            // in which case give an arity error.
+            //
+            //     function foo<T extends string>(x: T): void; // Report type argument error
+            //     function foo(): void;
+            //     foo<number>(0);
+            //
+            var candidateForArgumentError;
+            var candidateForTypeArgumentError;
+            var result;
+            // If we are in signature help, a trailing comma indicates that we intend to provide another argument,
+            // so we will only accept overloads with arity at least 1 higher than the current number of provided arguments.
+            var signatureHelpTrailingComma = candidatesOutArray && node.kind === 181 /* CallExpression */ && node.arguments.hasTrailingComma;
+            // Section 4.12.1:
+            // if the candidate list contains one or more signatures for which the type of each argument
+            // expression is a subtype of each corresponding parameter type, the return type of the first
+            // of those signatures becomes the return type of the function call.
+            // Otherwise, the return type of the first signature in the candidate list becomes the return
+            // type of the function call.
+            //
+            // Whether the call is an error is determined by assignability of the arguments. The subtype pass
+            // is just important for choosing the best signature. So in the case where there is only one
+            // signature, the subtype pass is useless. So skipping it is an optimization.
+            if (candidates.length > 1) {
+                result = chooseOverload(candidates, subtypeRelation, signatureHelpTrailingComma);
             }
-            for (var i = 0; i < count; i++) {
-                callback(getTypeAtPosition(source, i), getTypeAtPosition(target, i));
+            if (!result) {
+                result = chooseOverload(candidates, assignableRelation, signatureHelpTrailingComma);
             }
-        }
-        function createInferenceContext(signature, inferUnionTypes) {
-            var inferences = ts.map(signature.typeParameters, createTypeInferencesObject);
-            return {
-                signature: signature,
-                inferUnionTypes: inferUnionTypes,
-                inferences: inferences,
-                inferredTypes: new Array(signature.typeParameters.length),
-            };
-        }
-        function createTypeInferencesObject() {
-            return {
-                primary: undefined,
-                secondary: undefined,
-                topLevel: true,
-                isFixed: false,
-            };
-        }
-        // Return true if the given type could possibly reference a type parameter for which
-        // we perform type inference (i.e. a type parameter of a generic function). We cache
-        // results for union and intersection types for performance reasons.
-        function couldContainTypeParameters(type) {
-            return !!(type.flags & 16384 /* TypeParameter */ ||
-                type.flags & 131072 /* Reference */ && ts.forEach(type.typeArguments, couldContainTypeParameters) ||
-                type.flags & 2097152 /* Anonymous */ && type.symbol && type.symbol.flags & (8192 /* Method */ | 2048 /* TypeLiteral */ | 32 /* Class */) ||
-                type.flags & 1572864 /* UnionOrIntersection */ && couldUnionOrIntersectionContainTypeParameters(type));
-        }
-        function couldUnionOrIntersectionContainTypeParameters(type) {
-            if (type.couldContainTypeParameters === undefined) {
-                type.couldContainTypeParameters = ts.forEach(type.types, couldContainTypeParameters);
+            if (result) {
+                return result;
             }
-            return type.couldContainTypeParameters;
-        }
-        function isTypeParameterAtTopLevel(type, typeParameter) {
-            return type === typeParameter || type.flags & 1572864 /* UnionOrIntersection */ && ts.forEach(type.types, function (t) { return isTypeParameterAtTopLevel(t, typeParameter); });
-        }
-        function inferTypes(context, originalSource, originalTarget) {
-            var typeParameters = context.signature.typeParameters;
-            var sourceStack;
-            var targetStack;
-            var depth = 0;
-            var inferiority = 0;
-            var visited = ts.createMap();
-            inferFromTypes(originalSource, originalTarget);
-            function isInProcess(source, target) {
-                for (var i = 0; i < depth; i++) {
-                    if (source === sourceStack[i] && target === targetStack[i]) {
-                        return true;
-                    }
+            // No signatures were applicable. Now report errors based on the last applicable signature with
+            // no arguments excluded from assignability checks.
+            // If candidate is undefined, it means that no candidates had a suitable arity. In that case,
+            // skip the checkApplicableSignature check.
+            if (candidateForArgumentError) {
+                if (isJsxOpeningOrSelfClosingElement) {
+                    // We do not report any error here because any error will be handled in "resolveCustomJsxElementAttributesType".
+                    return candidateForArgumentError;
                 }
-                return false;
+                // excludeArgument is undefined, in this case also equivalent to [undefined, undefined, ...]
+                // The importance of excludeArgument is to prevent us from typing function expression parameters
+                // in arguments too early. If possible, we'd like to only type them once we know the correct
+                // overload. However, this matters for the case where the call is correct. When the call is
+                // an error, we don't need to exclude any arguments, although it would cause no harm to do so.
+                checkApplicableSignature(node, args, candidateForArgumentError, assignableRelation, /*excludeArgument*/ undefined, /*reportErrors*/ true);
             }
-            function inferFromTypes(source, target) {
-                if (!couldContainTypeParameters(target)) {
-                    return;
-                }
-                if (source.flags & 524288 /* Union */ && target.flags & 524288 /* Union */ && !(source.flags & 16 /* Enum */ && target.flags & 16 /* Enum */) ||
-                    source.flags & 1048576 /* Intersection */ && target.flags & 1048576 /* Intersection */) {
-                    // Source and target are both unions or both intersections. If source and target
-                    // are the same type, just relate each constituent type to itself.
-                    if (source === target) {
-                        for (var _i = 0, _a = source.types; _i < _a.length; _i++) {
-                            var t = _a[_i];
-                            inferFromTypes(t, t);
-                        }
-                        return;
-                    }
-                    // Find each source constituent type that has an identically matching target constituent
-                    // type, and for each such type infer from the type to itself. When inferring from a
-                    // type to itself we effectively find all type parameter occurrences within that type
-                    // and infer themselves as their type arguments. We have special handling for numeric
-                    // and string literals because the number and string types are not represented as unions
-                    // of all their possible values.
-                    var matchingTypes = void 0;
-                    for (var _b = 0, _c = source.types; _b < _c.length; _b++) {
-                        var t = _c[_b];
-                        if (typeIdenticalToSomeType(t, target.types)) {
-                            (matchingTypes || (matchingTypes = [])).push(t);
-                            inferFromTypes(t, t);
-                        }
-                        else if (t.flags & (64 /* NumberLiteral */ | 32 /* StringLiteral */)) {
-                            var b = getBaseTypeOfLiteralType(t);
-                            if (typeIdenticalToSomeType(b, target.types)) {
-                                (matchingTypes || (matchingTypes = [])).push(t, b);
-                            }
+            else if (candidateForTypeArgumentError) {
+                var typeArguments_1 = node.typeArguments;
+                checkTypeArguments(candidateForTypeArgumentError, typeArguments_1, ts.map(typeArguments_1, getTypeFromTypeNode), /*reportErrors*/ true, fallbackError);
+            }
+            else if (typeArguments && ts.every(signatures, function (sig) { return ts.length(sig.typeParameters) !== typeArguments.length; })) {
+                var min = Number.POSITIVE_INFINITY;
+                var max = Number.NEGATIVE_INFINITY;
+                for (var _i = 0, signatures_5 = signatures; _i < signatures_5.length; _i++) {
+                    var sig = signatures_5[_i];
+                    min = Math.min(min, getMinTypeArgumentCount(sig.typeParameters));
+                    max = Math.max(max, ts.length(sig.typeParameters));
+                }
+                var paramCount = min < max ? min + "-" + max : min;
+                diagnostics.add(ts.createDiagnosticForNode(node, ts.Diagnostics.Expected_0_type_arguments_but_got_1, paramCount, typeArguments.length));
+            }
+            else if (args) {
+                var min = Number.POSITIVE_INFINITY;
+                var max = Number.NEGATIVE_INFINITY;
+                for (var _a = 0, signatures_6 = signatures; _a < signatures_6.length; _a++) {
+                    var sig = signatures_6[_a];
+                    min = Math.min(min, sig.minArgumentCount);
+                    max = Math.max(max, sig.parameters.length);
+                }
+                var hasRestParameter_1 = ts.some(signatures, function (sig) { return sig.hasRestParameter; });
+                var hasSpreadArgument = getSpreadArgumentIndex(args) > -1;
+                var paramCount = hasRestParameter_1 ? min :
+                    min < max ? min + "-" + max :
+                        min;
+                var argCount = args.length - (hasSpreadArgument ? 1 : 0);
+                var error_1 = hasRestParameter_1 && hasSpreadArgument ? ts.Diagnostics.Expected_at_least_0_arguments_but_got_a_minimum_of_1 :
+                    hasRestParameter_1 ? ts.Diagnostics.Expected_at_least_0_arguments_but_got_1 :
+                        hasSpreadArgument ? ts.Diagnostics.Expected_0_arguments_but_got_a_minimum_of_1 :
+                            ts.Diagnostics.Expected_0_arguments_but_got_1;
+                diagnostics.add(ts.createDiagnosticForNode(node, error_1, paramCount, argCount));
+            }
+            else if (fallbackError) {
+                diagnostics.add(ts.createDiagnosticForNode(node, fallbackError));
+            }
+            // No signature was applicable. We have already reported the errors for the invalid signature.
+            // If this is a type resolution session, e.g. Language Service, try to get better information that anySignature.
+            // Pick the first candidate that matches the arity. This way we can get a contextual type for cases like:
+            //  declare function f(a: { xa: number; xb: number; });
+            //  f({ |
+            if (!produceDiagnostics) {
+                for (var _b = 0, candidates_1 = candidates; _b < candidates_1.length; _b++) {
+                    var candidate = candidates_1[_b];
+                    if (hasCorrectArity(node, args, candidate)) {
+                        if (candidate.typeParameters && typeArguments) {
+                            candidate = getSignatureInstantiation(candidate, ts.map(typeArguments, getTypeFromTypeNode));
                         }
-                    }
-                    // Next, to improve the quality of inferences, reduce the source and target types by
-                    // removing the identically matched constituents. For example, when inferring from
-                    // 'string | string[]' to 'string | T' we reduce the types to 'string[]' and 'T'.
-                    if (matchingTypes) {
-                        source = removeTypesFromUnionOrIntersection(source, matchingTypes);
-                        target = removeTypesFromUnionOrIntersection(target, matchingTypes);
+                        return candidate;
                     }
                 }
-                if (target.flags & 16384 /* TypeParameter */) {
-                    // If target is a type parameter, make an inference, unless the source type contains
-                    // the anyFunctionType (the wildcard type that's used to avoid contextually typing functions).
-                    // Because the anyFunctionType is internal, it should not be exposed to the user by adding
-                    // it as an inference candidate. Hopefully, a better candidate will come along that does
-                    // not contain anyFunctionType when we come back to this argument for its second round
-                    // of inference.
-                    if (source.flags & 134217728 /* ContainsAnyFunctionType */) {
-                        return;
+            }
+            return resolveErrorCall(node);
+            function chooseOverload(candidates, relation, signatureHelpTrailingComma) {
+                if (signatureHelpTrailingComma === void 0) { signatureHelpTrailingComma = false; }
+                candidateForArgumentError = undefined;
+                candidateForTypeArgumentError = undefined;
+                for (var _i = 0, candidates_2 = candidates; _i < candidates_2.length; _i++) {
+                    var originalCandidate = candidates_2[_i];
+                    if (!hasCorrectArity(node, args, originalCandidate, signatureHelpTrailingComma)) {
+                        continue;
                     }
-                    for (var i = 0; i < typeParameters.length; i++) {
-                        if (target === typeParameters[i]) {
-                            var inferences = context.inferences[i];
-                            if (!inferences.isFixed) {
-                                // Any inferences that are made to a type parameter in a union type are inferior
-                                // to inferences made to a flat (non-union) type. This is because if we infer to
-                                // T | string[], we really don't know if we should be inferring to T or not (because
-                                // the correct constituent on the target side could be string[]). Therefore, we put
-                                // such inferior inferences into a secondary bucket, and only use them if the primary
-                                // bucket is empty.
-                                var candidates = inferiority ?
-                                    inferences.secondary || (inferences.secondary = []) :
-                                    inferences.primary || (inferences.primary = []);
-                                if (!ts.contains(candidates, source)) {
-                                    candidates.push(source);
-                                }
-                                if (!isTypeParameterAtTopLevel(originalTarget, target)) {
-                                    inferences.topLevel = false;
+                    var candidate = void 0;
+                    var inferenceContext = originalCandidate.typeParameters ?
+                        createInferenceContext(originalCandidate, /*flags*/ ts.isInJavaScriptFile(node) ? 4 /* AnyDefault */ : 0) :
+                        undefined;
+                    while (true) {
+                        candidate = originalCandidate;
+                        if (candidate.typeParameters) {
+                            var typeArgumentTypes = void 0;
+                            if (typeArguments) {
+                                typeArgumentTypes = fillMissingTypeArguments(ts.map(typeArguments, getTypeFromTypeNode), candidate.typeParameters, getMinTypeArgumentCount(candidate.typeParameters));
+                                if (!checkTypeArguments(candidate, typeArguments, typeArgumentTypes, /*reportErrors*/ false)) {
+                                    candidateForTypeArgumentError = originalCandidate;
+                                    break;
                                 }
                             }
-                            return;
-                        }
-                    }
-                }
-                else if (source.flags & 131072 /* Reference */ && target.flags & 131072 /* Reference */ && source.target === target.target) {
-                    // If source and target are references to the same generic type, infer from type arguments
-                    var sourceTypes = source.typeArguments || emptyArray;
-                    var targetTypes = target.typeArguments || emptyArray;
-                    var count = sourceTypes.length < targetTypes.length ? sourceTypes.length : targetTypes.length;
-                    for (var i = 0; i < count; i++) {
-                        inferFromTypes(sourceTypes[i], targetTypes[i]);
-                    }
-                }
-                else if (target.flags & 1572864 /* UnionOrIntersection */) {
-                    var targetTypes = target.types;
-                    var typeParameterCount = 0;
-                    var typeParameter = void 0;
-                    // First infer to each type in union or intersection that isn't a type parameter
-                    for (var _d = 0, targetTypes_2 = targetTypes; _d < targetTypes_2.length; _d++) {
-                        var t = targetTypes_2[_d];
-                        if (t.flags & 16384 /* TypeParameter */ && ts.contains(typeParameters, t)) {
-                            typeParameter = t;
-                            typeParameterCount++;
-                        }
-                        else {
-                            inferFromTypes(source, t);
-                        }
-                    }
-                    // Next, if target containings a single naked type parameter, make a secondary inference to that type
-                    // parameter. This gives meaningful results for union types in co-variant positions and intersection
-                    // types in contra-variant positions (such as callback parameters).
-                    if (typeParameterCount === 1) {
-                        inferiority++;
-                        inferFromTypes(source, typeParameter);
-                        inferiority--;
-                    }
-                }
-                else if (source.flags & 1572864 /* UnionOrIntersection */) {
-                    // Source is a union or intersection type, infer from each constituent type
-                    var sourceTypes = source.types;
-                    for (var _e = 0, sourceTypes_3 = sourceTypes; _e < sourceTypes_3.length; _e++) {
-                        var sourceType = sourceTypes_3[_e];
-                        inferFromTypes(sourceType, target);
-                    }
-                }
-                else {
-                    source = getApparentType(source);
-                    if (source.flags & 2588672 /* ObjectType */) {
-                        if (isInProcess(source, target)) {
-                            return;
-                        }
-                        if (isDeeplyNestedGeneric(source, sourceStack, depth) && isDeeplyNestedGeneric(target, targetStack, depth)) {
-                            return;
+                            else {
+                                typeArgumentTypes = inferTypeArguments(node, candidate, args, excludeArgument, inferenceContext);
+                            }
+                            candidate = getSignatureInstantiation(candidate, typeArgumentTypes);
                         }
-                        var key = source.id + "," + target.id;
-                        if (visited[key]) {
-                            return;
+                        if (!checkApplicableSignature(node, args, candidate, relation, excludeArgument, /*reportErrors*/ false)) {
+                            candidateForArgumentError = candidate;
+                            break;
                         }
-                        visited[key] = true;
-                        if (depth === 0) {
-                            sourceStack = [];
-                            targetStack = [];
+                        var index = excludeArgument ? ts.indexOf(excludeArgument, /*value*/ true) : -1;
+                        if (index < 0) {
+                            return candidate;
                         }
-                        sourceStack[depth] = source;
-                        targetStack[depth] = target;
-                        depth++;
-                        inferFromProperties(source, target);
-                        inferFromSignatures(source, target, 0 /* Call */);
-                        inferFromSignatures(source, target, 1 /* Construct */);
-                        inferFromIndexTypes(source, target);
-                        depth--;
+                        excludeArgument[index] = false;
                     }
                 }
+                return undefined;
             }
-            function inferFromProperties(source, target) {
-                var properties = getPropertiesOfObjectType(target);
-                for (var _i = 0, properties_3 = properties; _i < properties_3.length; _i++) {
-                    var targetProp = properties_3[_i];
-                    var sourceProp = getPropertyOfObjectType(source, targetProp.name);
-                    if (sourceProp) {
-                        inferFromTypes(getTypeOfSymbol(sourceProp), getTypeOfSymbol(targetProp));
+        }
+        function resolveCallExpression(node, candidatesOutArray) {
+            if (node.expression.kind === 97 /* SuperKeyword */) {
+                var superType = checkSuperExpression(node.expression);
+                if (superType !== unknownType) {
+                    // In super call, the candidate signatures are the matching arity signatures of the base constructor function instantiated
+                    // with the type arguments specified in the extends clause.
+                    var baseTypeNode = ts.getClassExtendsHeritageClauseElement(ts.getContainingClass(node));
+                    if (baseTypeNode) {
+                        var baseConstructors = getInstantiatedConstructorsForTypeArguments(superType, baseTypeNode.typeArguments, baseTypeNode);
+                        return resolveCall(node, baseConstructors, candidatesOutArray);
                     }
                 }
+                return resolveUntypedCall(node);
             }
-            function inferFromSignatures(source, target, kind) {
-                var sourceSignatures = getSignaturesOfType(source, kind);
-                var targetSignatures = getSignaturesOfType(target, kind);
-                var sourceLen = sourceSignatures.length;
-                var targetLen = targetSignatures.length;
-                var len = sourceLen < targetLen ? sourceLen : targetLen;
-                for (var i = 0; i < len; i++) {
-                    inferFromSignature(getErasedSignature(sourceSignatures[sourceLen - len + i]), getErasedSignature(targetSignatures[targetLen - len + i]));
-                }
+            var funcType = checkNonNullExpression(node.expression);
+            if (funcType === silentNeverType) {
+                return silentNeverSignature;
             }
-            function inferFromParameterTypes(source, target) {
-                return inferFromTypes(source, target);
+            var apparentType = getApparentType(funcType);
+            if (apparentType === unknownType) {
+                // Another error has already been reported
+                return resolveErrorCall(node);
             }
-            function inferFromSignature(source, target) {
-                forEachMatchingParameterType(source, target, inferFromParameterTypes);
-                if (source.typePredicate && target.typePredicate && source.typePredicate.kind === target.typePredicate.kind) {
-                    inferFromTypes(source.typePredicate.type, target.typePredicate.type);
-                }
-                else {
-                    inferFromTypes(getReturnTypeOfSignature(source), getReturnTypeOfSignature(target));
+            // Technically, this signatures list may be incomplete. We are taking the apparent type,
+            // but we are not including call signatures that may have been added to the Object or
+            // Function interface, since they have none by default. This is a bit of a leap of faith
+            // that the user will not add any.
+            var callSignatures = getSignaturesOfType(apparentType, 0 /* Call */);
+            var constructSignatures = getSignaturesOfType(apparentType, 1 /* Construct */);
+            // TS 1.0 Spec: 4.12
+            // In an untyped function call no TypeArgs are permitted, Args can be any argument list, no contextual
+            // types are provided for the argument expressions, and the result is always of type Any.
+            if (isUntypedFunctionCall(funcType, apparentType, callSignatures.length, constructSignatures.length)) {
+                // The unknownType indicates that an error already occurred (and was reported).  No
+                // need to report another error in this case.
+                if (funcType !== unknownType && node.typeArguments) {
+                    error(node, ts.Diagnostics.Untyped_function_calls_may_not_accept_type_arguments);
                 }
+                return resolveUntypedCall(node);
             }
-            function inferFromIndexTypes(source, target) {
-                var targetStringIndexType = getIndexTypeOfType(target, 0 /* String */);
-                if (targetStringIndexType) {
-                    var sourceIndexType = getIndexTypeOfType(source, 0 /* String */) ||
-                        getImplicitIndexTypeOfType(source, 0 /* String */);
-                    if (sourceIndexType) {
-                        inferFromTypes(sourceIndexType, targetStringIndexType);
-                    }
-                }
-                var targetNumberIndexType = getIndexTypeOfType(target, 1 /* Number */);
-                if (targetNumberIndexType) {
-                    var sourceIndexType = getIndexTypeOfType(source, 1 /* Number */) ||
-                        getIndexTypeOfType(source, 0 /* String */) ||
-                        getImplicitIndexTypeOfType(source, 1 /* Number */);
-                    if (sourceIndexType) {
-                        inferFromTypes(sourceIndexType, targetNumberIndexType);
-                    }
+            // If FuncExpr's apparent type(section 3.8.1) is a function type, the call is a typed function call.
+            // TypeScript employs overload resolution in typed function calls in order to support functions
+            // with multiple call signatures.
+            if (!callSignatures.length) {
+                if (constructSignatures.length) {
+                    error(node, ts.Diagnostics.Value_of_type_0_is_not_callable_Did_you_mean_to_include_new, typeToString(funcType));
                 }
-            }
-        }
-        function typeIdenticalToSomeType(type, types) {
-            for (var _i = 0, types_10 = types; _i < types_10.length; _i++) {
-                var t = types_10[_i];
-                if (isTypeIdenticalTo(t, type)) {
-                    return true;
+                else {
+                    error(node, ts.Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures, typeToString(apparentType));
                 }
+                return resolveErrorCall(node);
             }
-            return false;
+            return resolveCall(node, callSignatures, candidatesOutArray);
         }
         /**
-         * Return a new union or intersection type computed by removing a given set of types
-         * from a given union or intersection type.
+         * TS 1.0 spec: 4.12
+         * If FuncExpr is of type Any, or of an object type that has no call or construct signatures
+         * but is a subtype of the Function interface, the call is an untyped function call.
          */
-        function removeTypesFromUnionOrIntersection(type, typesToRemove) {
-            var reducedTypes = [];
-            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                var t = _a[_i];
-                if (!typeIdenticalToSomeType(t, typesToRemove)) {
-                    reducedTypes.push(t);
-                }
-            }
-            return type.flags & 524288 /* Union */ ? getUnionType(reducedTypes) : getIntersectionType(reducedTypes);
-        }
-        function getInferenceCandidates(context, index) {
-            var inferences = context.inferences[index];
-            return inferences.primary || inferences.secondary || emptyArray;
-        }
-        function hasPrimitiveConstraint(type) {
-            var constraint = getConstraintOfTypeParameter(type);
-            return constraint && maybeTypeOfKind(constraint, 8190 /* Primitive */);
-        }
-        function getInferredType(context, index) {
-            var inferredType = context.inferredTypes[index];
-            var inferenceSucceeded;
-            if (!inferredType) {
-                var inferences = getInferenceCandidates(context, index);
-                if (inferences.length) {
-                    // We widen inferred literal types if
-                    // all inferences were made to top-level ocurrences of the type parameter, and
-                    // the type parameter has no constraint or its constraint includes no primitive or literal types, and
-                    // the type parameter was fixed during inference or does not occur at top-level in the return type.
-                    var signature = context.signature;
-                    var widenLiteralTypes = context.inferences[index].topLevel &&
-                        !hasPrimitiveConstraint(signature.typeParameters[index]) &&
-                        (context.inferences[index].isFixed || !isTypeParameterAtTopLevel(getReturnTypeOfSignature(signature), signature.typeParameters[index]));
-                    var baseInferences = widenLiteralTypes ? ts.map(inferences, getWidenedLiteralType) : inferences;
-                    // Infer widened union or supertype, or the unknown type for no common supertype
-                    var unionOrSuperType = context.inferUnionTypes ? getUnionType(baseInferences, /*subtypeReduction*/ true) : getCommonSupertype(baseInferences);
-                    inferredType = unionOrSuperType ? getWidenedType(unionOrSuperType) : unknownType;
-                    inferenceSucceeded = !!unionOrSuperType;
-                }
-                else {
-                    // Infer the empty object type when no inferences were made. It is important to remember that
-                    // in this case, inference still succeeds, meaning there is no error for not having inference
-                    // candidates. An inference error only occurs when there are *conflicting* candidates, i.e.
-                    // candidates with no common supertype.
-                    inferredType = emptyObjectType;
-                    inferenceSucceeded = true;
-                }
-                context.inferredTypes[index] = inferredType;
-                // Only do the constraint check if inference succeeded (to prevent cascading errors)
-                if (inferenceSucceeded) {
-                    var constraint = getConstraintOfTypeParameter(context.signature.typeParameters[index]);
-                    if (constraint) {
-                        var instantiatedConstraint = instantiateType(constraint, getInferenceMapper(context));
-                        if (!isTypeAssignableTo(inferredType, getTypeWithThisArgument(instantiatedConstraint, inferredType))) {
-                            context.inferredTypes[index] = inferredType = instantiatedConstraint;
-                        }
-                    }
-                }
-                else if (context.failedTypeParameterIndex === undefined || context.failedTypeParameterIndex > index) {
-                    // If inference failed, it is necessary to record the index of the failed type parameter (the one we are on).
-                    // It might be that inference has already failed on a later type parameter on a previous call to inferTypeArguments.
-                    // So if this failure is on preceding type parameter, this type parameter is the new failure index.
-                    context.failedTypeParameterIndex = index;
-                }
-            }
-            return inferredType;
-        }
-        function getInferredTypes(context) {
-            for (var i = 0; i < context.inferredTypes.length; i++) {
-                getInferredType(context, i);
+        function isUntypedFunctionCall(funcType, apparentFuncType, numCallSignatures, numConstructSignatures) {
+            if (isTypeAny(funcType)) {
+                return true;
             }
-            return context.inferredTypes;
-        }
-        // EXPRESSION TYPE CHECKING
-        function getResolvedSymbol(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedSymbol) {
-                links.resolvedSymbol = !ts.nodeIsMissing(node) && resolveName(node, node.text, 107455 /* Value */ | 1048576 /* ExportValue */, ts.Diagnostics.Cannot_find_name_0, node) || unknownSymbol;
+            if (isTypeAny(apparentFuncType) && funcType.flags & 16384 /* TypeParameter */) {
+                return true;
             }
-            return links.resolvedSymbol;
-        }
-        function isInTypeQuery(node) {
-            // TypeScript 1.0 spec (April 2014): 3.6.3
-            // A type query consists of the keyword typeof followed by an expression.
-            // The expression is restricted to a single identifier or a sequence of identifiers separated by periods
-            while (node) {
-                switch (node.kind) {
-                    case 158 /* TypeQuery */:
-                        return true;
-                    case 69 /* Identifier */:
-                    case 139 /* QualifiedName */:
-                        node = node.parent;
-                        continue;
-                    default:
-                        return false;
+            if (!numCallSignatures && !numConstructSignatures) {
+                // We exclude union types because we may have a union of function types that happen to have
+                // no common signatures.
+                if (funcType.flags & 65536 /* Union */) {
+                    return false;
                 }
-            }
-            ts.Debug.fail("should not get here");
-        }
-        // Return the flow cache key for a "dotted name" (i.e. a sequence of identifiers
-        // separated by dots). The key consists of the id of the symbol referenced by the
-        // leftmost identifier followed by zero or more property names separated by dots.
-        // The result is undefined if the reference isn't a dotted name.
-        function getFlowCacheKey(node) {
-            if (node.kind === 69 /* Identifier */) {
-                var symbol = getResolvedSymbol(node);
-                return symbol !== unknownSymbol ? "" + getSymbolId(symbol) : undefined;
-            }
-            if (node.kind === 97 /* ThisKeyword */) {
-                return "0";
-            }
-            if (node.kind === 172 /* PropertyAccessExpression */) {
-                var key = getFlowCacheKey(node.expression);
-                return key && key + "." + node.name.text;
-            }
-            return undefined;
-        }
-        function getLeftmostIdentifierOrThis(node) {
-            switch (node.kind) {
-                case 69 /* Identifier */:
-                case 97 /* ThisKeyword */:
-                    return node;
-                case 172 /* PropertyAccessExpression */:
-                    return getLeftmostIdentifierOrThis(node.expression);
-            }
-            return undefined;
-        }
-        function isMatchingReference(source, target) {
-            switch (source.kind) {
-                case 69 /* Identifier */:
-                    return target.kind === 69 /* Identifier */ && getResolvedSymbol(source) === getResolvedSymbol(target) ||
-                        (target.kind === 218 /* VariableDeclaration */ || target.kind === 169 /* BindingElement */) &&
-                            getExportSymbolOfValueSymbolIfExported(getResolvedSymbol(source)) === getSymbolOfNode(target);
-                case 97 /* ThisKeyword */:
-                    return target.kind === 97 /* ThisKeyword */;
-                case 172 /* PropertyAccessExpression */:
-                    return target.kind === 172 /* PropertyAccessExpression */ &&
-                        source.name.text === target.name.text &&
-                        isMatchingReference(source.expression, target.expression);
+                return isTypeAssignableTo(funcType, globalFunctionType);
             }
             return false;
         }
-        function containsMatchingReference(source, target) {
-            while (source.kind === 172 /* PropertyAccessExpression */) {
-                source = source.expression;
-                if (isMatchingReference(source, target)) {
-                    return true;
+        function resolveNewExpression(node, candidatesOutArray) {
+            if (node.arguments && languageVersion < 1 /* ES5 */) {
+                var spreadIndex = getSpreadArgumentIndex(node.arguments);
+                if (spreadIndex >= 0) {
+                    error(node.arguments[spreadIndex], ts.Diagnostics.Spread_operator_in_new_expressions_is_only_available_when_targeting_ECMAScript_5_and_higher);
                 }
             }
-            return false;
-        }
-        // Return true if target is a property access xxx.yyy, source is a property access xxx.zzz, the declared
-        // type of xxx is a union type, and yyy is a property that is possibly a discriminant. We consider a property
-        // a possible discriminant if its type differs in the constituents of containing union type, and if every
-        // choice is a unit type or a union of unit types.
-        function containsMatchingReferenceDiscriminant(source, target) {
-            return target.kind === 172 /* PropertyAccessExpression */ &&
-                containsMatchingReference(source, target.expression) &&
-                isDiscriminantProperty(getDeclaredTypeOfReference(target.expression), target.name.text);
-        }
-        function getDeclaredTypeOfReference(expr) {
-            if (expr.kind === 69 /* Identifier */) {
-                return getTypeOfSymbol(getResolvedSymbol(expr));
+            var expressionType = checkNonNullExpression(node.expression);
+            if (expressionType === silentNeverType) {
+                return silentNeverSignature;
             }
-            if (expr.kind === 172 /* PropertyAccessExpression */) {
-                var type = getDeclaredTypeOfReference(expr.expression);
-                return type && getTypeOfPropertyOfType(type, expr.name.text);
+            // If expressionType's apparent type(section 3.8.1) is an object type with one or
+            // more construct signatures, the expression is processed in the same manner as a
+            // function call, but using the construct signatures as the initial set of candidate
+            // signatures for overload resolution. The result type of the function call becomes
+            // the result type of the operation.
+            expressionType = getApparentType(expressionType);
+            if (expressionType === unknownType) {
+                // Another error has already been reported
+                return resolveErrorCall(node);
             }
-            return undefined;
-        }
-        function isDiscriminantProperty(type, name) {
-            if (type && type.flags & 524288 /* Union */) {
-                var prop = getUnionOrIntersectionProperty(type, name);
-                if (prop && prop.flags & 268435456 /* SyntheticProperty */) {
-                    if (prop.isDiscriminantProperty === undefined) {
-                        prop.isDiscriminantProperty = prop.hasNonUniformType && isLiteralType(getTypeOfSymbol(prop));
-                    }
-                    return prop.isDiscriminantProperty;
-                }
+            // If the expression is a class of abstract type, then it cannot be instantiated.
+            // Note, only class declarations can be declared abstract.
+            // In the case of a merged class-module or class-interface declaration,
+            // only the class declaration node will have the Abstract flag set.
+            var valueDecl = expressionType.symbol && getClassLikeDeclarationOfSymbol(expressionType.symbol);
+            if (valueDecl && ts.getModifierFlags(valueDecl) & 128 /* Abstract */) {
+                error(node, ts.Diagnostics.Cannot_create_an_instance_of_the_abstract_class_0, ts.declarationNameToString(ts.getNameOfDeclaration(valueDecl)));
+                return resolveErrorCall(node);
             }
-            return false;
-        }
-        function isOrContainsMatchingReference(source, target) {
-            return isMatchingReference(source, target) || containsMatchingReference(source, target);
-        }
-        function hasMatchingArgument(callExpression, reference) {
-            if (callExpression.arguments) {
-                for (var _i = 0, _a = callExpression.arguments; _i < _a.length; _i++) {
-                    var argument = _a[_i];
-                    if (isOrContainsMatchingReference(reference, argument)) {
-                        return true;
-                    }
+            // TS 1.0 spec: 4.11
+            // If expressionType is of type Any, Args can be any argument
+            // list and the result of the operation is of type Any.
+            if (isTypeAny(expressionType)) {
+                if (node.typeArguments) {
+                    error(node, ts.Diagnostics.Untyped_function_calls_may_not_accept_type_arguments);
                 }
+                return resolveUntypedCall(node);
             }
-            if (callExpression.expression.kind === 172 /* PropertyAccessExpression */ &&
-                isOrContainsMatchingReference(reference, callExpression.expression.expression)) {
-                return true;
-            }
-            return false;
-        }
-        function getFlowNodeId(flow) {
-            if (!flow.id) {
-                flow.id = nextFlowId;
-                nextFlowId++;
-            }
-            return flow.id;
-        }
-        function typeMaybeAssignableTo(source, target) {
-            if (!(source.flags & 524288 /* Union */)) {
-                return isTypeAssignableTo(source, target);
-            }
-            for (var _i = 0, _a = source.types; _i < _a.length; _i++) {
-                var t = _a[_i];
-                if (isTypeAssignableTo(t, target)) {
-                    return true;
+            // Technically, this signatures list may be incomplete. We are taking the apparent type,
+            // but we are not including construct signatures that may have been added to the Object or
+            // Function interface, since they have none by default. This is a bit of a leap of faith
+            // that the user will not add any.
+            var constructSignatures = getSignaturesOfType(expressionType, 1 /* Construct */);
+            if (constructSignatures.length) {
+                if (!isConstructorAccessible(node, constructSignatures[0])) {
+                    return resolveErrorCall(node);
                 }
+                return resolveCall(node, constructSignatures, candidatesOutArray);
             }
-            return false;
-        }
-        // Remove those constituent types of declaredType to which no constituent type of assignedType is assignable.
-        // For example, when a variable of type number | string | boolean is assigned a value of type number | boolean,
-        // we remove type string.
-        function getAssignmentReducedType(declaredType, assignedType) {
-            if (declaredType !== assignedType) {
-                if (assignedType.flags & 8192 /* Never */) {
-                    return assignedType;
+            // If expressionType's apparent type is an object type with no construct signatures but
+            // one or more call signatures, the expression is processed as a function call. A compile-time
+            // error occurs if the result of the function call is not Void. The type of the result of the
+            // operation is Any. It is an error to have a Void this type.
+            var callSignatures = getSignaturesOfType(expressionType, 0 /* Call */);
+            if (callSignatures.length) {
+                var signature = resolveCall(node, callSignatures, candidatesOutArray);
+                if (!isJavaScriptConstructor(signature.declaration) && getReturnTypeOfSignature(signature) !== voidType) {
+                    error(node, ts.Diagnostics.Only_a_void_function_can_be_called_with_the_new_keyword);
                 }
-                var reducedType = filterType(declaredType, function (t) { return typeMaybeAssignableTo(assignedType, t); });
-                if (!(reducedType.flags & 8192 /* Never */)) {
-                    return reducedType;
+                if (getThisTypeOfSignature(signature) === voidType) {
+                    error(node, ts.Diagnostics.A_function_that_is_called_with_the_new_keyword_cannot_have_a_this_type_that_is_void);
                 }
+                return signature;
             }
-            return declaredType;
-        }
-        function getTypeFactsOfTypes(types) {
-            var result = 0 /* None */;
-            for (var _i = 0, types_11 = types; _i < types_11.length; _i++) {
-                var t = types_11[_i];
-                result |= getTypeFacts(t);
-            }
-            return result;
-        }
-        function isFunctionObjectType(type) {
-            // We do a quick check for a "bind" property before performing the more expensive subtype
-            // check. This gives us a quicker out in the common case where an object type is not a function.
-            var resolved = resolveStructuredTypeMembers(type);
-            return !!(resolved.callSignatures.length || resolved.constructSignatures.length ||
-                resolved.members["bind"] && isTypeSubtypeOf(type, globalFunctionType));
+            error(node, ts.Diagnostics.Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature);
+            return resolveErrorCall(node);
         }
-        function getTypeFacts(type) {
-            var flags = type.flags;
-            if (flags & 2 /* String */) {
-                return strictNullChecks ? 4079361 /* StringStrictFacts */ : 4194049 /* StringFacts */;
-            }
-            if (flags & 32 /* StringLiteral */) {
-                return strictNullChecks ?
-                    type.text === "" ? 3030785 /* EmptyStringStrictFacts */ : 1982209 /* NonEmptyStringStrictFacts */ :
-                    type.text === "" ? 3145473 /* EmptyStringFacts */ : 4194049 /* NonEmptyStringFacts */;
-            }
-            if (flags & (4 /* Number */ | 16 /* Enum */)) {
-                return strictNullChecks ? 4079234 /* NumberStrictFacts */ : 4193922 /* NumberFacts */;
-            }
-            if (flags & (64 /* NumberLiteral */ | 256 /* EnumLiteral */)) {
-                var isZero = type.text === "0";
-                return strictNullChecks ?
-                    isZero ? 3030658 /* ZeroStrictFacts */ : 1982082 /* NonZeroStrictFacts */ :
-                    isZero ? 3145346 /* ZeroFacts */ : 4193922 /* NonZeroFacts */;
-            }
-            if (flags & 8 /* Boolean */) {
-                return strictNullChecks ? 4078980 /* BooleanStrictFacts */ : 4193668 /* BooleanFacts */;
-            }
-            if (flags & 136 /* BooleanLike */) {
-                return strictNullChecks ?
-                    type === falseType ? 3030404 /* FalseStrictFacts */ : 1981828 /* TrueStrictFacts */ :
-                    type === falseType ? 3145092 /* FalseFacts */ : 4193668 /* TrueFacts */;
-            }
-            if (flags & 2588672 /* ObjectType */) {
-                return isFunctionObjectType(type) ?
-                    strictNullChecks ? 6164448 /* FunctionStrictFacts */ : 8376288 /* FunctionFacts */ :
-                    strictNullChecks ? 6166480 /* ObjectStrictFacts */ : 8378320 /* ObjectFacts */;
-            }
-            if (flags & (1024 /* Void */ | 2048 /* Undefined */)) {
-                return 2457472 /* UndefinedFacts */;
-            }
-            if (flags & 4096 /* Null */) {
-                return 2340752 /* NullFacts */;
-            }
-            if (flags & 512 /* ESSymbol */) {
-                return strictNullChecks ? 1981320 /* SymbolStrictFacts */ : 4193160 /* SymbolFacts */;
-            }
-            if (flags & 16384 /* TypeParameter */) {
-                var constraint = getConstraintOfTypeParameter(type);
-                return getTypeFacts(constraint || emptyObjectType);
-            }
-            if (flags & 1572864 /* UnionOrIntersection */) {
-                return getTypeFactsOfTypes(type.types);
+        function isConstructorAccessible(node, signature) {
+            if (!signature || !signature.declaration) {
+                return true;
             }
-            return 8388607 /* All */;
-        }
-        function getTypeWithFacts(type, include) {
-            return filterType(type, function (t) { return (getTypeFacts(t) & include) !== 0; });
-        }
-        function getTypeWithDefault(type, defaultExpression) {
-            if (defaultExpression) {
-                var defaultType = checkExpression(defaultExpression);
-                return getUnionType([getTypeWithFacts(type, 131072 /* NEUndefined */), defaultType]);
+            var declaration = signature.declaration;
+            var modifiers = ts.getModifierFlags(declaration);
+            // Public constructor is accessible.
+            if (!(modifiers & 24 /* NonPublicAccessibilityModifier */)) {
+                return true;
             }
-            return type;
-        }
-        function getTypeOfDestructuredProperty(type, name) {
-            var text = getTextOfPropertyName(name);
-            return getTypeOfPropertyOfType(type, text) ||
-                isNumericLiteralName(text) && getIndexTypeOfType(type, 1 /* Number */) ||
-                getIndexTypeOfType(type, 0 /* String */) ||
-                unknownType;
-        }
-        function getTypeOfDestructuredArrayElement(type, index) {
-            return isTupleLikeType(type) && getTypeOfPropertyOfType(type, "" + index) ||
-                checkIteratedTypeOrElementType(type, /*errorNode*/ undefined, /*allowStringInput*/ false) ||
-                unknownType;
-        }
-        function getTypeOfDestructuredSpreadElement(type) {
-            return createArrayType(checkIteratedTypeOrElementType(type, /*errorNode*/ undefined, /*allowStringInput*/ false) || unknownType);
-        }
-        function getAssignedTypeOfBinaryExpression(node) {
-            return node.parent.kind === 170 /* ArrayLiteralExpression */ || node.parent.kind === 253 /* PropertyAssignment */ ?
-                getTypeWithDefault(getAssignedType(node), node.right) :
-                checkExpression(node.right);
-        }
-        function getAssignedTypeOfArrayLiteralElement(node, element) {
-            return getTypeOfDestructuredArrayElement(getAssignedType(node), ts.indexOf(node.elements, element));
-        }
-        function getAssignedTypeOfSpreadElement(node) {
-            return getTypeOfDestructuredSpreadElement(getAssignedType(node.parent));
-        }
-        function getAssignedTypeOfPropertyAssignment(node) {
-            return getTypeOfDestructuredProperty(getAssignedType(node.parent), node.name);
-        }
-        function getAssignedTypeOfShorthandPropertyAssignment(node) {
-            return getTypeWithDefault(getAssignedTypeOfPropertyAssignment(node), node.objectAssignmentInitializer);
-        }
-        function getAssignedType(node) {
-            var parent = node.parent;
-            switch (parent.kind) {
-                case 207 /* ForInStatement */:
-                    return stringType;
-                case 208 /* ForOfStatement */:
-                    return checkRightHandSideOfForOf(parent.expression) || unknownType;
-                case 187 /* BinaryExpression */:
-                    return getAssignedTypeOfBinaryExpression(parent);
-                case 181 /* DeleteExpression */:
-                    return undefinedType;
-                case 170 /* ArrayLiteralExpression */:
-                    return getAssignedTypeOfArrayLiteralElement(parent, node);
-                case 191 /* SpreadElementExpression */:
-                    return getAssignedTypeOfSpreadElement(parent);
-                case 253 /* PropertyAssignment */:
-                    return getAssignedTypeOfPropertyAssignment(parent);
-                case 254 /* ShorthandPropertyAssignment */:
-                    return getAssignedTypeOfShorthandPropertyAssignment(parent);
+            var declaringClassDeclaration = getClassLikeDeclarationOfSymbol(declaration.parent.symbol);
+            var declaringClass = getDeclaredTypeOfSymbol(declaration.parent.symbol);
+            // A private or protected constructor can only be instantiated within its own class (or a subclass, for protected)
+            if (!isNodeWithinClass(node, declaringClassDeclaration)) {
+                var containingClass = ts.getContainingClass(node);
+                if (containingClass) {
+                    var containingType = getTypeOfNode(containingClass);
+                    var baseTypes = getBaseTypes(containingType);
+                    while (baseTypes.length) {
+                        var baseType = baseTypes[0];
+                        if (modifiers & 16 /* Protected */ &&
+                            baseType.symbol === declaration.parent.symbol) {
+                            return true;
+                        }
+                        baseTypes = getBaseTypes(baseType);
+                    }
+                }
+                if (modifiers & 8 /* Private */) {
+                    error(node, ts.Diagnostics.Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration, typeToString(declaringClass));
+                }
+                if (modifiers & 16 /* Protected */) {
+                    error(node, ts.Diagnostics.Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration, typeToString(declaringClass));
+                }
+                return false;
             }
-            return unknownType;
-        }
-        function getInitialTypeOfBindingElement(node) {
-            var pattern = node.parent;
-            var parentType = getInitialType(pattern.parent);
-            var type = pattern.kind === 167 /* ObjectBindingPattern */ ?
-                getTypeOfDestructuredProperty(parentType, node.propertyName || node.name) :
-                !node.dotDotDotToken ?
-                    getTypeOfDestructuredArrayElement(parentType, ts.indexOf(pattern.elements, node)) :
-                    getTypeOfDestructuredSpreadElement(parentType);
-            return getTypeWithDefault(type, node.initializer);
-        }
-        function getTypeOfInitializer(node) {
-            // Return the cached type if one is available. If the type of the variable was inferred
-            // from its initializer, we'll already have cached the type. Otherwise we compute it now
-            // without caching such that transient types are reflected.
-            var links = getNodeLinks(node);
-            return links.resolvedType || checkExpression(node);
+            return true;
         }
-        function getInitialTypeOfVariableDeclaration(node) {
-            if (node.initializer) {
-                return getTypeOfInitializer(node.initializer);
-            }
-            if (node.parent.parent.kind === 207 /* ForInStatement */) {
-                return stringType;
-            }
-            if (node.parent.parent.kind === 208 /* ForOfStatement */) {
-                return checkRightHandSideOfForOf(node.parent.parent.expression) || unknownType;
+        function resolveTaggedTemplateExpression(node, candidatesOutArray) {
+            var tagType = checkExpression(node.tag);
+            var apparentType = getApparentType(tagType);
+            if (apparentType === unknownType) {
+                // Another error has already been reported
+                return resolveErrorCall(node);
             }
-            return unknownType;
-        }
-        function getInitialType(node) {
-            return node.kind === 218 /* VariableDeclaration */ ?
-                getInitialTypeOfVariableDeclaration(node) :
-                getInitialTypeOfBindingElement(node);
-        }
-        function getInitialOrAssignedType(node) {
-            return node.kind === 218 /* VariableDeclaration */ || node.kind === 169 /* BindingElement */ ?
-                getInitialType(node) :
-                getAssignedType(node);
-        }
-        function getReferenceCandidate(node) {
-            switch (node.kind) {
-                case 178 /* ParenthesizedExpression */:
-                    return getReferenceCandidate(node.expression);
-                case 187 /* BinaryExpression */:
-                    switch (node.operatorToken.kind) {
-                        case 56 /* EqualsToken */:
-                            return getReferenceCandidate(node.left);
-                        case 24 /* CommaToken */:
-                            return getReferenceCandidate(node.right);
-                    }
+            var callSignatures = getSignaturesOfType(apparentType, 0 /* Call */);
+            var constructSignatures = getSignaturesOfType(apparentType, 1 /* Construct */);
+            if (isUntypedFunctionCall(tagType, apparentType, callSignatures.length, constructSignatures.length)) {
+                return resolveUntypedCall(node);
             }
-            return node;
-        }
-        function getTypeOfSwitchClause(clause) {
-            if (clause.kind === 249 /* CaseClause */) {
-                var caseType = getRegularTypeOfLiteralType(checkExpression(clause.expression));
-                return isUnitType(caseType) ? caseType : undefined;
+            if (!callSignatures.length) {
+                error(node, ts.Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures, typeToString(apparentType));
+                return resolveErrorCall(node);
             }
-            return neverType;
+            return resolveCall(node, callSignatures, candidatesOutArray);
         }
-        function getSwitchClauseTypes(switchStatement) {
-            var links = getNodeLinks(switchStatement);
-            if (!links.switchTypes) {
-                // If all case clauses specify expressions that have unit types, we return an array
-                // of those unit types. Otherwise we return an empty array.
-                var types = ts.map(switchStatement.caseBlock.clauses, getTypeOfSwitchClause);
-                links.switchTypes = !ts.contains(types, undefined) ? types : emptyArray;
+        /**
+         * Gets the localized diagnostic head message to use for errors when resolving a decorator as a call expression.
+         */
+        function getDiagnosticHeadMessageForDecoratorResolution(node) {
+            switch (node.parent.kind) {
+                case 229 /* ClassDeclaration */:
+                case 199 /* ClassExpression */:
+                    return ts.Diagnostics.Unable_to_resolve_signature_of_class_decorator_when_called_as_an_expression;
+                case 146 /* Parameter */:
+                    return ts.Diagnostics.Unable_to_resolve_signature_of_parameter_decorator_when_called_as_an_expression;
+                case 149 /* PropertyDeclaration */:
+                    return ts.Diagnostics.Unable_to_resolve_signature_of_property_decorator_when_called_as_an_expression;
+                case 151 /* MethodDeclaration */:
+                case 153 /* GetAccessor */:
+                case 154 /* SetAccessor */:
+                    return ts.Diagnostics.Unable_to_resolve_signature_of_method_decorator_when_called_as_an_expression;
             }
-            return links.switchTypes;
         }
-        function eachTypeContainedIn(source, types) {
-            return source.flags & 524288 /* Union */ ? !ts.forEach(source.types, function (t) { return !ts.contains(types, t); }) : ts.contains(types, source);
+        /**
+         * Resolves a decorator as if it were a call expression.
+         */
+        function resolveDecorator(node, candidatesOutArray) {
+            var funcType = checkExpression(node.expression);
+            var apparentType = getApparentType(funcType);
+            if (apparentType === unknownType) {
+                return resolveErrorCall(node);
+            }
+            var callSignatures = getSignaturesOfType(apparentType, 0 /* Call */);
+            var constructSignatures = getSignaturesOfType(apparentType, 1 /* Construct */);
+            if (isUntypedFunctionCall(funcType, apparentType, callSignatures.length, constructSignatures.length)) {
+                return resolveUntypedCall(node);
+            }
+            var headMessage = getDiagnosticHeadMessageForDecoratorResolution(node);
+            if (!callSignatures.length) {
+                var errorInfo = void 0;
+                errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures, typeToString(apparentType));
+                errorInfo = ts.chainDiagnosticMessages(errorInfo, headMessage);
+                diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(node, errorInfo));
+                return resolveErrorCall(node);
+            }
+            return resolveCall(node, callSignatures, candidatesOutArray, headMessage);
         }
-        function isTypeSubsetOf(source, target) {
-            return source === target || target.flags & 524288 /* Union */ && isTypeSubsetOfUnion(source, target);
+        /**
+         * This function is similar to getResolvedSignature but is exclusively for trying to resolve JSX stateless-function component.
+         * The main reason we have to use this function instead of getResolvedSignature because, the caller of this function will already check the type of openingLikeElement's tagName
+         * and pass the type as elementType. The elementType can not be a union (as such case should be handled by the caller of this function)
+         * Note: at this point, we are still not sure whether the opening-like element is a stateless function component or not.
+         * @param openingLikeElement an opening-like JSX element to try to resolve as JSX stateless function
+         * @param elementType an element type of the opneing-like element by checking opening-like element's tagname.
+         * @param candidatesOutArray an array of signature to be filled in by the function. It is passed by signature help in the language service;
+         *                           the function will fill it up with appropriate candidate signatures
+         */
+        function getResolvedJsxStatelessFunctionSignature(openingLikeElement, elementType, candidatesOutArray) {
+            ts.Debug.assert(!(elementType.flags & 65536 /* Union */));
+            var callSignature = resolveStatelessJsxOpeningLikeElement(openingLikeElement, elementType, candidatesOutArray);
+            return callSignature;
         }
-        function isTypeSubsetOfUnion(source, target) {
-            if (source.flags & 524288 /* Union */) {
-                for (var _i = 0, _a = source.types; _i < _a.length; _i++) {
-                    var t = _a[_i];
-                    if (!containsType(target.types, t)) {
-                        return false;
-                    }
+        /**
+         * Try treating a given opening-like element as stateless function component and resolve a tagName to a function signature.
+         * @param openingLikeElement an JSX opening-like element we want to try resolve its stateless function if possible
+         * @param elementType a type of the opening-like JSX element, a result of resolving tagName in opening-like element.
+         * @param candidatesOutArray an array of signature to be filled in by the function. It is passed by signature help in the language service;
+         *                           the function will fill it up with appropriate candidate signatures
+         * @return a resolved signature if we can find function matching function signature through resolve call or a first signature in the list of functions.
+         *         otherwise return undefined if tag-name of the opening-like element doesn't have call signatures
+         */
+        function resolveStatelessJsxOpeningLikeElement(openingLikeElement, elementType, candidatesOutArray) {
+            // If this function is called from language service, elementType can be a union type. This is not possible if the function is called from compiler (see: resolveCustomJsxElementAttributesType)
+            if (elementType.flags & 65536 /* Union */) {
+                var types = elementType.types;
+                var result = void 0;
+                for (var _i = 0, types_16 = types; _i < types_16.length; _i++) {
+                    var type = types_16[_i];
+                    result = result || resolveStatelessJsxOpeningLikeElement(openingLikeElement, type, candidatesOutArray);
                 }
-                return true;
+                return result;
             }
-            if (source.flags & 256 /* EnumLiteral */ && target.flags & 16 /* Enum */ && source.baseType === target) {
-                return true;
+            var callSignatures = elementType && getSignaturesOfType(elementType, 0 /* Call */);
+            if (callSignatures && callSignatures.length > 0) {
+                var callSignature = void 0;
+                callSignature = resolveCall(openingLikeElement, callSignatures, candidatesOutArray);
+                return callSignature;
             }
-            return containsType(target.types, source);
+            return undefined;
         }
-        function filterType(type, f) {
-            if (type.flags & 524288 /* Union */) {
-                var types = type.types;
-                var filtered = ts.filter(types, f);
-                return filtered === types ? type : getUnionTypeFromSortedList(filtered);
+        function resolveSignature(node, candidatesOutArray) {
+            switch (node.kind) {
+                case 181 /* CallExpression */:
+                    return resolveCallExpression(node, candidatesOutArray);
+                case 182 /* NewExpression */:
+                    return resolveNewExpression(node, candidatesOutArray);
+                case 183 /* TaggedTemplateExpression */:
+                    return resolveTaggedTemplateExpression(node, candidatesOutArray);
+                case 147 /* Decorator */:
+                    return resolveDecorator(node, candidatesOutArray);
+                case 251 /* JsxOpeningElement */:
+                case 250 /* JsxSelfClosingElement */:
+                    // This code-path is called by language service
+                    return resolveStatelessJsxOpeningLikeElement(node, checkExpression(node.tagName), candidatesOutArray);
             }
-            return f(type) ? type : neverType;
+            ts.Debug.fail("Branch in 'resolveSignature' should be unreachable.");
         }
-        function isIncomplete(flowType) {
-            return flowType.flags === 0;
+        /**
+         * Resolve a signature of a given call-like expression.
+         * @param node a call-like expression to try resolve a signature for
+         * @param candidatesOutArray an array of signature to be filled in by the function. It is passed by signature help in the language service;
+         *                           the function will fill it up with appropriate candidate signatures
+         * @return a signature of the call-like expression or undefined if one can't be found
+         */
+        function getResolvedSignature(node, candidatesOutArray) {
+            var links = getNodeLinks(node);
+            // If getResolvedSignature has already been called, we will have cached the resolvedSignature.
+            // However, it is possible that either candidatesOutArray was not passed in the first time,
+            // or that a different candidatesOutArray was passed in. Therefore, we need to redo the work
+            // to correctly fill the candidatesOutArray.
+            var cached = links.resolvedSignature;
+            if (cached && cached !== resolvingSignature && !candidatesOutArray) {
+                return cached;
+            }
+            links.resolvedSignature = resolvingSignature;
+            var result = resolveSignature(node, candidatesOutArray);
+            // If signature resolution originated in control flow type analysis (for example to compute the
+            // assigned type in a flow assignment) we don't cache the result as it may be based on temporary
+            // types from the control flow analysis.
+            links.resolvedSignature = flowLoopStart === flowLoopCount ? result : cached;
+            return result;
         }
-        function getTypeFromFlowType(flowType) {
-            return flowType.flags === 0 ? flowType.type : flowType;
+        function getResolvedOrAnySignature(node) {
+            // If we're already in the process of resolving the given signature, don't resolve again as
+            // that could cause infinite recursion. Instead, return anySignature.
+            return getNodeLinks(node).resolvedSignature === resolvingSignature ? resolvingSignature : getResolvedSignature(node);
         }
-        function createFlowType(type, incomplete) {
-            return incomplete ? { flags: 0, type: type } : type;
+        /**
+         * Indicates whether a declaration can be treated as a constructor in a JavaScript
+         * file.
+         */
+        function isJavaScriptConstructor(node) {
+            if (ts.isInJavaScriptFile(node)) {
+                // If the node has a @class tag, treat it like a constructor.
+                if (ts.getJSDocClassTag(node))
+                    return true;
+                // If the symbol of the node has members, treat it like a constructor.
+                var symbol = ts.isFunctionDeclaration(node) || ts.isFunctionExpression(node) ? getSymbolOfNode(node) :
+                    ts.isVariableDeclaration(node) && ts.isFunctionExpression(node.initializer) ? getSymbolOfNode(node.initializer) :
+                        undefined;
+                return symbol && symbol.members !== undefined;
+            }
+            return false;
         }
-        function getFlowTypeOfReference(reference, declaredType, assumeInitialized, flowContainer) {
-            var key;
-            if (!reference.flowNode || assumeInitialized && !(declaredType.flags & 4178943 /* Narrowable */)) {
-                return declaredType;
+        function getInferredClassType(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.inferredClassType) {
+                links.inferredClassType = createAnonymousType(symbol, symbol.members || emptySymbols, emptyArray, emptyArray, /*stringIndexType*/ undefined, /*numberIndexType*/ undefined);
             }
-            var initialType = assumeInitialized ? declaredType : includeFalsyTypes(declaredType, 2048 /* Undefined */);
-            var visitedFlowStart = visitedFlowCount;
-            var result = getTypeFromFlowType(getTypeAtFlowNode(reference.flowNode));
-            visitedFlowCount = visitedFlowStart;
-            if (reference.parent.kind === 196 /* NonNullExpression */ && getTypeWithFacts(result, 524288 /* NEUndefinedOrNull */).flags & 8192 /* Never */) {
-                return declaredType;
+            return links.inferredClassType;
+        }
+        function isInferredClassType(type) {
+            return type.symbol
+                && getObjectFlags(type) & 16 /* Anonymous */
+                && getSymbolLinks(type.symbol).inferredClassType === type;
+        }
+        /**
+         * Syntactically and semantically checks a call or new expression.
+         * @param node The call/new expression to be checked.
+         * @returns On success, the expression's signature's return type. On failure, anyType.
+         */
+        function checkCallExpression(node) {
+            // Grammar checking; stop grammar-checking if checkGrammarTypeArguments return true
+            checkGrammarTypeArguments(node, node.typeArguments) || checkGrammarArguments(node, node.arguments);
+            var signature = getResolvedSignature(node);
+            if (node.expression.kind === 97 /* SuperKeyword */) {
+                return voidType;
             }
-            return result;
-            function getTypeAtFlowNode(flow) {
-                while (true) {
-                    if (flow.flags & 512 /* Shared */) {
-                        // We cache results of flow type resolution for shared nodes that were previously visited in
-                        // the same getFlowTypeOfReference invocation. A node is considered shared when it is the
-                        // antecedent of more than one node.
-                        for (var i = visitedFlowStart; i < visitedFlowCount; i++) {
-                            if (visitedFlowNodes[i] === flow) {
-                                return visitedFlowTypes[i];
-                            }
-                        }
-                    }
-                    var type = void 0;
-                    if (flow.flags & 16 /* Assignment */) {
-                        type = getTypeAtFlowAssignment(flow);
-                        if (!type) {
-                            flow = flow.antecedent;
-                            continue;
-                        }
-                    }
-                    else if (flow.flags & 96 /* Condition */) {
-                        type = getTypeAtFlowCondition(flow);
-                    }
-                    else if (flow.flags & 128 /* SwitchClause */) {
-                        type = getTypeAtSwitchClause(flow);
-                    }
-                    else if (flow.flags & 12 /* Label */) {
-                        if (flow.antecedents.length === 1) {
-                            flow = flow.antecedents[0];
-                            continue;
-                        }
-                        type = flow.flags & 4 /* BranchLabel */ ?
-                            getTypeAtFlowBranchLabel(flow) :
-                            getTypeAtFlowLoopLabel(flow);
-                    }
-                    else if (flow.flags & 2 /* Start */) {
-                        // Check if we should continue with the control flow of the containing function.
-                        var container = flow.container;
-                        if (container && container !== flowContainer && reference.kind !== 172 /* PropertyAccessExpression */) {
-                            flow = container.flowNode;
-                            continue;
-                        }
-                        // At the top of the flow we have the initial type.
-                        type = initialType;
+            if (node.kind === 182 /* NewExpression */) {
+                var declaration = signature.declaration;
+                if (declaration &&
+                    declaration.kind !== 152 /* Constructor */ &&
+                    declaration.kind !== 156 /* ConstructSignature */ &&
+                    declaration.kind !== 161 /* ConstructorType */ &&
+                    !ts.isJSDocConstructSignature(declaration)) {
+                    // When resolved signature is a call signature (and not a construct signature) the result type is any, unless
+                    // the declaring function had members created through 'x.prototype.y = expr' or 'this.y = expr' psuedodeclarations
+                    // in a JS file
+                    // Note:JS inferred classes might come from a variable declaration instead of a function declaration.
+                    // In this case, using getResolvedSymbol directly is required to avoid losing the members from the declaration.
+                    var funcSymbol = node.expression.kind === 71 /* Identifier */ ?
+                        getResolvedSymbol(node.expression) :
+                        checkExpression(node.expression).symbol;
+                    if (funcSymbol && ts.isDeclarationOfFunctionOrClassExpression(funcSymbol)) {
+                        funcSymbol = getSymbolOfNode(funcSymbol.valueDeclaration.initializer);
                     }
-                    else {
-                        // Unreachable code errors are reported in the binding phase. Here we
-                        // simply return the declared type to reduce follow-on errors.
-                        type = declaredType;
+                    if (funcSymbol && funcSymbol.flags & 16 /* Function */ && (funcSymbol.members || ts.getJSDocClassTag(funcSymbol.valueDeclaration))) {
+                        return getInferredClassType(funcSymbol);
                     }
-                    if (flow.flags & 512 /* Shared */) {
-                        // Record visited node and the associated type in the cache.
-                        visitedFlowNodes[visitedFlowCount] = flow;
-                        visitedFlowTypes[visitedFlowCount] = type;
-                        visitedFlowCount++;
+                    else if (noImplicitAny) {
+                        error(node, ts.Diagnostics.new_expression_whose_target_lacks_a_construct_signature_implicitly_has_an_any_type);
                     }
-                    return type;
+                    return anyType;
                 }
             }
-            function getTypeAtFlowAssignment(flow) {
-                var node = flow.node;
-                // Assignments only narrow the computed type if the declared type is a union type. Thus, we
-                // only need to evaluate the assigned type if the declared type is a union type.
-                if (isMatchingReference(reference, node)) {
-                    var isIncrementOrDecrement = node.parent.kind === 185 /* PrefixUnaryExpression */ || node.parent.kind === 186 /* PostfixUnaryExpression */;
-                    return declaredType.flags & 524288 /* Union */ && !isIncrementOrDecrement ?
-                        getAssignmentReducedType(declaredType, getInitialOrAssignedType(node)) :
-                        declaredType;
-                }
-                // We didn't have a direct match. However, if the reference is a dotted name, this
-                // may be an assignment to a left hand part of the reference. For example, for a
-                // reference 'x.y.z', we may be at an assignment to 'x.y' or 'x'. In that case,
-                // return the declared type.
-                if (containsMatchingReference(reference, node)) {
-                    return declaredType;
-                }
-                // Assignment doesn't affect reference
-                return undefined;
+            // In JavaScript files, calls to any identifier 'require' are treated as external module imports
+            if (ts.isInJavaScriptFile(node) && isCommonJsRequire(node)) {
+                return resolveExternalModuleTypeByLiteral(node.arguments[0]);
             }
-            function getTypeAtFlowCondition(flow) {
-                var flowType = getTypeAtFlowNode(flow.antecedent);
-                var type = getTypeFromFlowType(flowType);
-                if (!(type.flags & 8192 /* Never */)) {
-                    // If we have an antecedent type (meaning we're reachable in some way), we first
-                    // attempt to narrow the antecedent type. If that produces the never type, and if
-                    // the antecedent type is incomplete (i.e. a transient type in a loop), then we
-                    // take the type guard as an indication that control *could* reach here once we
-                    // have the complete type. We proceed by switching to the silent never type which
-                    // doesn't report errors when operators are applied to it. Note that this is the
-                    // *only* place a silent never type is ever generated.
-                    var assumeTrue = (flow.flags & 32 /* TrueCondition */) !== 0;
-                    type = narrowType(type, flow.expression, assumeTrue);
-                    if (type.flags & 8192 /* Never */ && isIncomplete(flowType)) {
-                        type = silentNeverType;
-                    }
-                }
-                return createFlowType(type, isIncomplete(flowType));
+            return getReturnTypeOfSignature(signature);
+        }
+        function checkImportCallExpression(node) {
+            // Check grammar of dynamic import
+            checkGrammarArguments(node, node.arguments) || checkGrammarImportCallExpression(node);
+            if (node.arguments.length === 0) {
+                return createPromiseReturnType(node, anyType);
             }
-            function getTypeAtSwitchClause(flow) {
-                var flowType = getTypeAtFlowNode(flow.antecedent);
-                var type = getTypeFromFlowType(flowType);
-                var expr = flow.switchStatement.expression;
-                if (isMatchingReference(reference, expr)) {
-                    type = narrowTypeBySwitchOnDiscriminant(type, flow.switchStatement, flow.clauseStart, flow.clauseEnd);
-                }
-                else if (isMatchingReferenceDiscriminant(expr)) {
-                    type = narrowTypeByDiscriminant(type, expr, function (t) { return narrowTypeBySwitchOnDiscriminant(t, flow.switchStatement, flow.clauseStart, flow.clauseEnd); });
-                }
-                return createFlowType(type, isIncomplete(flowType));
+            var specifier = node.arguments[0];
+            var specifierType = checkExpressionCached(specifier);
+            // Even though multiple arugments is grammatically incorrect, type-check extra arguments for completion
+            for (var i = 1; i < node.arguments.length; ++i) {
+                checkExpressionCached(node.arguments[i]);
             }
-            function getTypeAtFlowBranchLabel(flow) {
-                var antecedentTypes = [];
-                var subtypeReduction = false;
-                var seenIncomplete = false;
-                for (var _i = 0, _a = flow.antecedents; _i < _a.length; _i++) {
-                    var antecedent = _a[_i];
-                    var flowType = getTypeAtFlowNode(antecedent);
-                    var type = getTypeFromFlowType(flowType);
-                    // If the type at a particular antecedent path is the declared type and the
-                    // reference is known to always be assigned (i.e. when declared and initial types
-                    // are the same), there is no reason to process more antecedents since the only
-                    // possible outcome is subtypes that will be removed in the final union type anyway.
-                    if (type === declaredType && declaredType === initialType) {
-                        return type;
-                    }
-                    if (!ts.contains(antecedentTypes, type)) {
-                        antecedentTypes.push(type);
-                    }
-                    // If an antecedent type is not a subset of the declared type, we need to perform
-                    // subtype reduction. This happens when a "foreign" type is injected into the control
-                    // flow using the instanceof operator or a user defined type predicate.
-                    if (!isTypeSubsetOf(type, declaredType)) {
-                        subtypeReduction = true;
-                    }
-                    if (isIncomplete(flowType)) {
-                        seenIncomplete = true;
-                    }
-                }
-                return createFlowType(getUnionType(antecedentTypes, subtypeReduction), seenIncomplete);
+            if (specifierType.flags & 2048 /* Undefined */ || specifierType.flags & 4096 /* Null */ || !isTypeAssignableTo(specifierType, stringType)) {
+                error(specifier, ts.Diagnostics.Dynamic_import_s_specifier_must_be_of_type_string_but_here_has_type_0, typeToString(specifierType));
             }
-            function getTypeAtFlowLoopLabel(flow) {
-                // If we have previously computed the control flow type for the reference at
-                // this flow loop junction, return the cached type.
-                var id = getFlowNodeId(flow);
-                var cache = flowLoopCaches[id] || (flowLoopCaches[id] = ts.createMap());
-                if (!key) {
-                    key = getFlowCacheKey(reference);
-                }
-                if (cache[key]) {
-                    return cache[key];
-                }
-                // If this flow loop junction and reference are already being processed, return
-                // the union of the types computed for each branch so far, marked as incomplete.
-                // We should never see an empty array here because the first antecedent of a loop
-                // junction is always the non-looping control flow path that leads to the top.
-                for (var i = flowLoopStart; i < flowLoopCount; i++) {
-                    if (flowLoopNodes[i] === flow && flowLoopKeys[i] === key) {
-                        return createFlowType(getUnionType(flowLoopTypes[i]), /*incomplete*/ true);
-                    }
-                }
-                // Add the flow loop junction and reference to the in-process stack and analyze
-                // each antecedent code path.
-                var antecedentTypes = [];
-                var subtypeReduction = false;
-                var firstAntecedentType;
-                flowLoopNodes[flowLoopCount] = flow;
-                flowLoopKeys[flowLoopCount] = key;
-                flowLoopTypes[flowLoopCount] = antecedentTypes;
-                for (var _i = 0, _a = flow.antecedents; _i < _a.length; _i++) {
-                    var antecedent = _a[_i];
-                    flowLoopCount++;
-                    var flowType = getTypeAtFlowNode(antecedent);
-                    flowLoopCount--;
-                    if (!firstAntecedentType) {
-                        firstAntecedentType = flowType;
-                    }
-                    var type = getTypeFromFlowType(flowType);
-                    // If we see a value appear in the cache it is a sign that control flow  analysis
-                    // was restarted and completed by checkExpressionCached. We can simply pick up
-                    // the resulting type and bail out.
-                    if (cache[key]) {
-                        return cache[key];
-                    }
-                    if (!ts.contains(antecedentTypes, type)) {
-                        antecedentTypes.push(type);
-                    }
-                    // If an antecedent type is not a subset of the declared type, we need to perform
-                    // subtype reduction. This happens when a "foreign" type is injected into the control
-                    // flow using the instanceof operator or a user defined type predicate.
-                    if (!isTypeSubsetOf(type, declaredType)) {
-                        subtypeReduction = true;
-                    }
-                    // If the type at a particular antecedent path is the declared type there is no
-                    // reason to process more antecedents since the only possible outcome is subtypes
-                    // that will be removed in the final union type anyway.
-                    if (type === declaredType) {
-                        break;
-                    }
-                }
-                // The result is incomplete if the first antecedent (the non-looping control flow path)
-                // is incomplete.
-                var result = getUnionType(antecedentTypes, subtypeReduction);
-                if (isIncomplete(firstAntecedentType)) {
-                    return createFlowType(result, /*incomplete*/ true);
+            // resolveExternalModuleName will return undefined if the moduleReferenceExpression is not a string literal
+            var moduleSymbol = resolveExternalModuleName(node, specifier);
+            if (moduleSymbol) {
+                var esModuleSymbol = resolveESModuleSymbol(moduleSymbol, specifier, /*dontRecursivelyResolve*/ true);
+                if (esModuleSymbol) {
+                    return createPromiseReturnType(node, getTypeOfSymbol(esModuleSymbol));
                 }
-                return cache[key] = result;
-            }
-            function isMatchingReferenceDiscriminant(expr) {
-                return expr.kind === 172 /* PropertyAccessExpression */ &&
-                    declaredType.flags & 524288 /* Union */ &&
-                    isMatchingReference(reference, expr.expression) &&
-                    isDiscriminantProperty(declaredType, expr.name.text);
             }
-            function narrowTypeByDiscriminant(type, propAccess, narrowType) {
-                var propName = propAccess.name.text;
-                var propType = getTypeOfPropertyOfType(type, propName);
-                var narrowedPropType = propType && narrowType(propType);
-                return propType === narrowedPropType ? type : filterType(type, function (t) { return isTypeComparableTo(getTypeOfPropertyOfType(t, propName), narrowedPropType); });
+            return createPromiseReturnType(node, anyType);
+        }
+        function isCommonJsRequire(node) {
+            if (!ts.isRequireCall(node, /*checkArgumentIsStringLiteral*/ true)) {
+                return false;
             }
-            function narrowTypeByTruthiness(type, expr, assumeTrue) {
-                if (isMatchingReference(reference, expr)) {
-                    return getTypeWithFacts(type, assumeTrue ? 1048576 /* Truthy */ : 2097152 /* Falsy */);
-                }
-                if (isMatchingReferenceDiscriminant(expr)) {
-                    return narrowTypeByDiscriminant(type, expr, function (t) { return getTypeWithFacts(t, assumeTrue ? 1048576 /* Truthy */ : 2097152 /* Falsy */); });
-                }
-                if (containsMatchingReferenceDiscriminant(reference, expr)) {
-                    return declaredType;
-                }
-                return type;
+            // Make sure require is not a local function
+            var resolvedRequire = resolveName(node.expression, node.expression.text, 107455 /* Value */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined);
+            if (!resolvedRequire) {
+                // project does not contain symbol named 'require' - assume commonjs require
+                return true;
             }
-            function narrowTypeByBinaryExpression(type, expr, assumeTrue) {
-                switch (expr.operatorToken.kind) {
-                    case 56 /* EqualsToken */:
-                        return narrowTypeByTruthiness(type, expr.left, assumeTrue);
-                    case 30 /* EqualsEqualsToken */:
-                    case 31 /* ExclamationEqualsToken */:
-                    case 32 /* EqualsEqualsEqualsToken */:
-                    case 33 /* ExclamationEqualsEqualsToken */:
-                        var operator_1 = expr.operatorToken.kind;
-                        var left_1 = getReferenceCandidate(expr.left);
-                        var right_1 = getReferenceCandidate(expr.right);
-                        if (left_1.kind === 182 /* TypeOfExpression */ && right_1.kind === 9 /* StringLiteral */) {
-                            return narrowTypeByTypeof(type, left_1, operator_1, right_1, assumeTrue);
-                        }
-                        if (right_1.kind === 182 /* TypeOfExpression */ && left_1.kind === 9 /* StringLiteral */) {
-                            return narrowTypeByTypeof(type, right_1, operator_1, left_1, assumeTrue);
-                        }
-                        if (isMatchingReference(reference, left_1)) {
-                            return narrowTypeByEquality(type, operator_1, right_1, assumeTrue);
-                        }
-                        if (isMatchingReference(reference, right_1)) {
-                            return narrowTypeByEquality(type, operator_1, left_1, assumeTrue);
-                        }
-                        if (isMatchingReferenceDiscriminant(left_1)) {
-                            return narrowTypeByDiscriminant(type, left_1, function (t) { return narrowTypeByEquality(t, operator_1, right_1, assumeTrue); });
-                        }
-                        if (isMatchingReferenceDiscriminant(right_1)) {
-                            return narrowTypeByDiscriminant(type, right_1, function (t) { return narrowTypeByEquality(t, operator_1, left_1, assumeTrue); });
-                        }
-                        if (containsMatchingReferenceDiscriminant(reference, left_1) || containsMatchingReferenceDiscriminant(reference, right_1)) {
-                            return declaredType;
-                        }
-                        break;
-                    case 91 /* InstanceOfKeyword */:
-                        return narrowTypeByInstanceof(type, expr, assumeTrue);
-                    case 24 /* CommaToken */:
-                        return narrowType(type, expr.right, assumeTrue);
-                }
-                return type;
+            // project includes symbol named 'require' - make sure that it it ambient and local non-alias
+            if (resolvedRequire.flags & 8388608 /* Alias */) {
+                return false;
             }
-            function narrowTypeByEquality(type, operator, value, assumeTrue) {
-                if (type.flags & 1 /* Any */) {
-                    return type;
-                }
-                if (operator === 31 /* ExclamationEqualsToken */ || operator === 33 /* ExclamationEqualsEqualsToken */) {
-                    assumeTrue = !assumeTrue;
-                }
-                var valueType = checkExpression(value);
-                if (valueType.flags & 6144 /* Nullable */) {
-                    if (!strictNullChecks) {
-                        return type;
-                    }
-                    var doubleEquals = operator === 30 /* EqualsEqualsToken */ || operator === 31 /* ExclamationEqualsToken */;
-                    var facts = doubleEquals ?
-                        assumeTrue ? 65536 /* EQUndefinedOrNull */ : 524288 /* NEUndefinedOrNull */ :
-                        value.kind === 93 /* NullKeyword */ ?
-                            assumeTrue ? 32768 /* EQNull */ : 262144 /* NENull */ :
-                            assumeTrue ? 16384 /* EQUndefined */ : 131072 /* NEUndefined */;
-                    return getTypeWithFacts(type, facts);
-                }
-                if (type.flags & 2589191 /* NotUnionOrUnit */) {
-                    return type;
-                }
-                if (assumeTrue) {
-                    var narrowedType = filterType(type, function (t) { return areTypesComparable(t, valueType); });
-                    return narrowedType.flags & 8192 /* Never */ ? type : narrowedType;
-                }
-                if (isUnitType(valueType)) {
-                    var regularType_1 = getRegularTypeOfLiteralType(valueType);
-                    return filterType(type, function (t) { return getRegularTypeOfLiteralType(t) !== regularType_1; });
-                }
-                return type;
+            var targetDeclarationKind = resolvedRequire.flags & 16 /* Function */
+                ? 228 /* FunctionDeclaration */
+                : resolvedRequire.flags & 3 /* Variable */
+                    ? 226 /* VariableDeclaration */
+                    : 0 /* Unknown */;
+            if (targetDeclarationKind !== 0 /* Unknown */) {
+                var decl = ts.getDeclarationOfKind(resolvedRequire, targetDeclarationKind);
+                // function/variable declaration should be ambient
+                return ts.isInAmbientContext(decl);
             }
-            function narrowTypeByTypeof(type, typeOfExpr, operator, literal, assumeTrue) {
-                // We have '==', '!=', '====', or !==' operator with 'typeof xxx' and string literal operands
-                var target = getReferenceCandidate(typeOfExpr.expression);
-                if (!isMatchingReference(reference, target)) {
-                    // For a reference of the form 'x.y', a 'typeof x === ...' type guard resets the
-                    // narrowed type of 'y' to its declared type.
-                    if (containsMatchingReference(reference, target)) {
-                        return declaredType;
-                    }
-                    return type;
-                }
-                if (operator === 31 /* ExclamationEqualsToken */ || operator === 33 /* ExclamationEqualsEqualsToken */) {
-                    assumeTrue = !assumeTrue;
-                }
-                if (assumeTrue && !(type.flags & 524288 /* Union */)) {
-                    // We narrow a non-union type to an exact primitive type if the non-union type
-                    // is a supertype of that primitive type. For example, type 'any' can be narrowed
-                    // to one of the primitive types.
-                    var targetType = typeofTypesByName[literal.text];
-                    if (targetType && isTypeSubtypeOf(targetType, type)) {
-                        return targetType;
-                    }
+            return false;
+        }
+        function checkTaggedTemplateExpression(node) {
+            return getReturnTypeOfSignature(getResolvedSignature(node));
+        }
+        function checkAssertion(node) {
+            var exprType = getRegularTypeOfObjectLiteral(getBaseTypeOfLiteralType(checkExpression(node.expression)));
+            checkSourceElement(node.type);
+            var targetType = getTypeFromTypeNode(node.type);
+            if (produceDiagnostics && targetType !== unknownType) {
+                var widenedType = getWidenedType(exprType);
+                if (!isTypeComparableTo(targetType, widenedType)) {
+                    checkTypeComparableTo(exprType, targetType, node, ts.Diagnostics.Type_0_cannot_be_converted_to_type_1);
                 }
-                var facts = assumeTrue ?
-                    typeofEQFacts[literal.text] || 64 /* TypeofEQHostObject */ :
-                    typeofNEFacts[literal.text] || 8192 /* TypeofNEHostObject */;
-                return getTypeWithFacts(type, facts);
             }
-            function narrowTypeBySwitchOnDiscriminant(type, switchStatement, clauseStart, clauseEnd) {
-                // We only narrow if all case expressions specify values with unit types
-                var switchTypes = getSwitchClauseTypes(switchStatement);
-                if (!switchTypes.length) {
-                    return type;
-                }
-                var clauseTypes = switchTypes.slice(clauseStart, clauseEnd);
-                var hasDefaultClause = clauseStart === clauseEnd || ts.contains(clauseTypes, neverType);
-                var discriminantType = getUnionType(clauseTypes);
-                var caseType = discriminantType.flags & 8192 /* Never */ ? neverType : filterType(type, function (t) { return isTypeComparableTo(discriminantType, t); });
-                if (!hasDefaultClause) {
-                    return caseType;
-                }
-                var defaultType = filterType(type, function (t) { return !(isUnitType(t) && ts.contains(switchTypes, getRegularTypeOfLiteralType(t))); });
-                return caseType.flags & 8192 /* Never */ ? defaultType : getUnionType([caseType, defaultType]);
+            return targetType;
+        }
+        function checkNonNullAssertion(node) {
+            return getNonNullableType(checkExpression(node.expression));
+        }
+        function checkMetaProperty(node) {
+            checkGrammarMetaProperty(node);
+            var container = ts.getNewTargetContainer(node);
+            if (!container) {
+                error(node, ts.Diagnostics.Meta_property_0_is_only_allowed_in_the_body_of_a_function_declaration_function_expression_or_constructor, "new.target");
+                return unknownType;
             }
-            function narrowTypeByInstanceof(type, expr, assumeTrue) {
-                var left = getReferenceCandidate(expr.left);
-                if (!isMatchingReference(reference, left)) {
-                    // For a reference of the form 'x.y', an 'x instanceof T' type guard resets the
-                    // narrowed type of 'y' to its declared type.
-                    if (containsMatchingReference(reference, left)) {
-                        return declaredType;
-                    }
-                    return type;
-                }
-                // Check that right operand is a function type with a prototype property
-                var rightType = checkExpression(expr.right);
-                if (!isTypeSubtypeOf(rightType, globalFunctionType)) {
-                    return type;
-                }
-                var targetType;
-                var prototypeProperty = getPropertyOfType(rightType, "prototype");
-                if (prototypeProperty) {
-                    // Target type is type of the prototype property
-                    var prototypePropertyType = getTypeOfSymbol(prototypeProperty);
-                    if (!isTypeAny(prototypePropertyType)) {
-                        targetType = prototypePropertyType;
-                    }
-                }
-                // Don't narrow from 'any' if the target type is exactly 'Object' or 'Function'
-                if (isTypeAny(type) && (targetType === globalObjectType || targetType === globalFunctionType)) {
-                    return type;
-                }
-                if (!targetType) {
-                    // Target type is type of construct signature
-                    var constructSignatures = void 0;
-                    if (rightType.flags & 65536 /* Interface */) {
-                        constructSignatures = resolveDeclaredMembers(rightType).declaredConstructSignatures;
-                    }
-                    else if (rightType.flags & 2097152 /* Anonymous */) {
-                        constructSignatures = getSignaturesOfType(rightType, 1 /* Construct */);
-                    }
-                    if (constructSignatures && constructSignatures.length) {
-                        targetType = getUnionType(ts.map(constructSignatures, function (signature) { return getReturnTypeOfSignature(getErasedSignature(signature)); }));
-                    }
-                }
-                if (targetType) {
-                    return getNarrowedType(type, targetType, assumeTrue);
-                }
-                return type;
+            else if (container.kind === 152 /* Constructor */) {
+                var symbol = getSymbolOfNode(container.parent);
+                return getTypeOfSymbol(symbol);
             }
-            function getNarrowedType(type, candidate, assumeTrue) {
-                if (!assumeTrue) {
-                    return filterType(type, function (t) { return !isTypeInstanceOf(t, candidate); });
-                }
-                // If the current type is a union type, remove all constituents that couldn't be instances of
-                // the candidate type. If one or more constituents remain, return a union of those.
-                if (type.flags & 524288 /* Union */) {
-                    var assignableType = filterType(type, function (t) { return isTypeInstanceOf(t, candidate); });
-                    if (!(assignableType.flags & 8192 /* Never */)) {
-                        return assignableType;
-                    }
-                }
-                // If the candidate type is a subtype of the target type, narrow to the candidate type.
-                // Otherwise, if the target type is assignable to the candidate type, keep the target type.
-                // Otherwise, if the candidate type is assignable to the target type, narrow to the candidate
-                // type. Otherwise, the types are completely unrelated, so narrow to an intersection of the
-                // two types.
-                var targetType = type.flags & 16384 /* TypeParameter */ ? getApparentType(type) : type;
-                return isTypeSubtypeOf(candidate, type) ? candidate :
-                    isTypeAssignableTo(type, candidate) ? type :
-                        isTypeAssignableTo(candidate, targetType) ? candidate :
-                            getIntersectionType([type, candidate]);
+            else {
+                var symbol = getSymbolOfNode(container);
+                return getTypeOfSymbol(symbol);
             }
-            function narrowTypeByTypePredicate(type, callExpression, assumeTrue) {
-                if (!hasMatchingArgument(callExpression, reference)) {
-                    return type;
-                }
-                var signature = getResolvedSignature(callExpression);
-                var predicate = signature.typePredicate;
-                if (!predicate) {
-                    return type;
-                }
-                // Don't narrow from 'any' if the predicate type is exactly 'Object' or 'Function'
-                if (isTypeAny(type) && (predicate.type === globalObjectType || predicate.type === globalFunctionType)) {
-                    return type;
-                }
-                if (ts.isIdentifierTypePredicate(predicate)) {
-                    var predicateArgument = callExpression.arguments[predicate.parameterIndex];
-                    if (predicateArgument) {
-                        if (isMatchingReference(reference, predicateArgument)) {
-                            return getNarrowedType(type, predicate.type, assumeTrue);
-                        }
-                        if (containsMatchingReference(reference, predicateArgument)) {
-                            return declaredType;
-                        }
+        }
+        function getTypeOfParameter(symbol) {
+            var type = getTypeOfSymbol(symbol);
+            if (strictNullChecks) {
+                var declaration = symbol.valueDeclaration;
+                if (declaration && declaration.initializer) {
+                    return getNullableType(type, 2048 /* Undefined */);
+                }
+            }
+            return type;
+        }
+        function getTypeAtPosition(signature, pos) {
+            return signature.hasRestParameter ?
+                pos < signature.parameters.length - 1 ? getTypeOfParameter(signature.parameters[pos]) : getRestTypeOfSignature(signature) :
+                pos < signature.parameters.length ? getTypeOfParameter(signature.parameters[pos]) : anyType;
+        }
+        function getTypeOfFirstParameterOfSignature(signature) {
+            return signature.parameters.length > 0 ? getTypeAtPosition(signature, 0) : neverType;
+        }
+        function inferFromAnnotatedParameters(signature, context, mapper) {
+            var len = signature.parameters.length - (signature.hasRestParameter ? 1 : 0);
+            for (var i = 0; i < len; i++) {
+                var declaration = signature.parameters[i].valueDeclaration;
+                if (declaration.type) {
+                    var typeNode = ts.getEffectiveTypeAnnotationNode(declaration);
+                    if (typeNode) {
+                        inferTypes(mapper.inferences, getTypeFromTypeNode(typeNode), getTypeAtPosition(context, i));
                     }
                 }
-                else {
-                    var invokedExpression = skipParenthesizedNodes(callExpression.expression);
-                    if (invokedExpression.kind === 173 /* ElementAccessExpression */ || invokedExpression.kind === 172 /* PropertyAccessExpression */) {
-                        var accessExpression = invokedExpression;
-                        var possibleReference = skipParenthesizedNodes(accessExpression.expression);
-                        if (isMatchingReference(reference, possibleReference)) {
-                            return getNarrowedType(type, predicate.type, assumeTrue);
-                        }
-                        if (containsMatchingReference(reference, possibleReference)) {
-                            return declaredType;
-                        }
+            }
+        }
+        function assignContextualParameterTypes(signature, context) {
+            signature.typeParameters = context.typeParameters;
+            if (context.thisParameter) {
+                var parameter = signature.thisParameter;
+                if (!parameter || parameter.valueDeclaration && !parameter.valueDeclaration.type) {
+                    if (!parameter) {
+                        signature.thisParameter = createSymbolWithType(context.thisParameter, /*type*/ undefined);
                     }
+                    assignTypeToParameterAndFixTypeParameters(signature.thisParameter, getTypeOfSymbol(context.thisParameter));
                 }
-                return type;
             }
-            // Narrow the given type based on the given expression having the assumed boolean value. The returned type
-            // will be a subtype or the same type as the argument.
-            function narrowType(type, expr, assumeTrue) {
-                switch (expr.kind) {
-                    case 69 /* Identifier */:
-                    case 97 /* ThisKeyword */:
-                    case 172 /* PropertyAccessExpression */:
-                        return narrowTypeByTruthiness(type, expr, assumeTrue);
-                    case 174 /* CallExpression */:
-                        return narrowTypeByTypePredicate(type, expr, assumeTrue);
-                    case 178 /* ParenthesizedExpression */:
-                        return narrowType(type, expr.expression, assumeTrue);
-                    case 187 /* BinaryExpression */:
-                        return narrowTypeByBinaryExpression(type, expr, assumeTrue);
-                    case 185 /* PrefixUnaryExpression */:
-                        if (expr.operator === 49 /* ExclamationToken */) {
-                            return narrowType(type, expr.operand, !assumeTrue);
-                        }
-                        break;
+            var len = signature.parameters.length - (signature.hasRestParameter ? 1 : 0);
+            for (var i = 0; i < len; i++) {
+                var parameter = signature.parameters[i];
+                if (!ts.getEffectiveTypeAnnotationNode(parameter.valueDeclaration)) {
+                    var contextualParameterType = getTypeAtPosition(context, i);
+                    assignTypeToParameterAndFixTypeParameters(parameter, contextualParameterType);
                 }
-                return type;
             }
-        }
-        function getTypeOfSymbolAtLocation(symbol, location) {
-            // If we have an identifier or a property access at the given location, if the location is
-            // an dotted name expression, and if the location is not an assignment target, obtain the type
-            // of the expression (which will reflect control flow analysis). If the expression indeed
-            // resolved to the given symbol, return the narrowed type.
-            if (location.kind === 69 /* Identifier */) {
-                if (ts.isRightSideOfQualifiedNameOrPropertyAccess(location)) {
-                    location = location.parent;
+            if (signature.hasRestParameter && isRestParameterIndex(context, signature.parameters.length - 1)) {
+                var parameter = ts.lastOrUndefined(signature.parameters);
+                if (!ts.getEffectiveTypeAnnotationNode(parameter.valueDeclaration)) {
+                    var contextualParameterType = getTypeOfSymbol(ts.lastOrUndefined(context.parameters));
+                    assignTypeToParameterAndFixTypeParameters(parameter, contextualParameterType);
                 }
-                if (ts.isExpression(location) && !ts.isAssignmentTarget(location)) {
-                    var type = checkExpression(location);
-                    if (getExportSymbolOfValueSymbolIfExported(getNodeLinks(location).resolvedSymbol) === symbol) {
-                        return type;
+            }
+        }
+        // When contextual typing assigns a type to a parameter that contains a binding pattern, we also need to push
+        // the destructured type into the contained binding elements.
+        function assignBindingElementTypes(node) {
+            if (ts.isBindingPattern(node.name)) {
+                for (var _i = 0, _a = node.name.elements; _i < _a.length; _i++) {
+                    var element = _a[_i];
+                    if (!ts.isOmittedExpression(element)) {
+                        if (element.name.kind === 71 /* Identifier */) {
+                            getSymbolLinks(getSymbolOfNode(element)).type = getTypeForBindingElement(element);
+                        }
+                        assignBindingElementTypes(element);
                     }
                 }
             }
-            // The location isn't a reference to the given symbol, meaning we're being asked
-            // a hypothetical question of what type the symbol would have if there was a reference
-            // to it at the given location. Since we have no control flow information for the
-            // hypothetical reference (control flow information is created and attached by the
-            // binder), we simply return the declared type of the symbol.
-            return getTypeOfSymbol(symbol);
         }
-        function skipParenthesizedNodes(expression) {
-            while (expression.kind === 178 /* ParenthesizedExpression */) {
-                expression = expression.expression;
+        function assignTypeToParameterAndFixTypeParameters(parameter, contextualType) {
+            var links = getSymbolLinks(parameter);
+            if (!links.type) {
+                links.type = contextualType;
+                var name_22 = ts.getNameOfDeclaration(parameter.valueDeclaration);
+                // if inference didn't come up with anything but {}, fall back to the binding pattern if present.
+                if (links.type === emptyObjectType &&
+                    (name_22.kind === 174 /* ObjectBindingPattern */ || name_22.kind === 175 /* ArrayBindingPattern */)) {
+                    links.type = getTypeFromBindingPattern(name_22);
+                }
+                assignBindingElementTypes(parameter.valueDeclaration);
             }
-            return expression;
         }
-        function getControlFlowContainer(node) {
-            while (true) {
-                node = node.parent;
-                if (ts.isFunctionLike(node) && !ts.getImmediatelyInvokedFunctionExpression(node) ||
-                    node.kind === 226 /* ModuleBlock */ ||
-                    node.kind === 256 /* SourceFile */ ||
-                    node.kind === 145 /* PropertyDeclaration */) {
-                    return node;
-                }
+        function createPromiseType(promisedType) {
+            // creates a `Promise<T>` type where `T` is the promisedType argument
+            var globalPromiseType = getGlobalPromiseType(/*reportErrors*/ true);
+            if (globalPromiseType !== emptyGenericType) {
+                // if the promised type is itself a promise, get the underlying type; otherwise, fallback to the promised type
+                promisedType = getAwaitedType(promisedType) || emptyObjectType;
+                return createTypeReference(globalPromiseType, [promisedType]);
             }
+            return emptyObjectType;
         }
-        // Check if a parameter is assigned anywhere within its declaring function.
-        function isParameterAssigned(symbol) {
-            var func = ts.getRootDeclaration(symbol.valueDeclaration).parent;
-            var links = getNodeLinks(func);
-            if (!(links.flags & 4194304 /* AssignmentsMarked */)) {
-                links.flags |= 4194304 /* AssignmentsMarked */;
-                if (!hasParentWithAssignmentsMarked(func)) {
-                    markParameterAssignments(func);
-                }
+        function createPromiseReturnType(func, promisedType) {
+            var promiseType = createPromiseType(promisedType);
+            if (promiseType === emptyObjectType) {
+                error(func, ts.isImportCall(func) ?
+                    ts.Diagnostics.A_dynamic_import_call_returns_a_Promise_Make_sure_you_have_a_declaration_for_Promise_or_include_ES2015_in_your_lib_option :
+                    ts.Diagnostics.An_async_function_or_method_must_return_a_Promise_Make_sure_you_have_a_declaration_for_Promise_or_include_ES2015_in_your_lib_option);
+                return unknownType;
             }
-            return symbol.isAssigned || false;
+            else if (!getGlobalPromiseConstructorSymbol(/*reportErrors*/ true)) {
+                error(func, ts.isImportCall(func) ?
+                    ts.Diagnostics.A_dynamic_import_call_in_ES5_SlashES3_requires_the_Promise_constructor_Make_sure_you_have_a_declaration_for_the_Promise_constructor_or_include_ES2015_in_your_lib_option :
+                    ts.Diagnostics.An_async_function_or_method_in_ES5_SlashES3_requires_the_Promise_constructor_Make_sure_you_have_a_declaration_for_the_Promise_constructor_or_include_ES2015_in_your_lib_option);
+            }
+            return promiseType;
         }
-        function hasParentWithAssignmentsMarked(node) {
-            while (true) {
-                node = node.parent;
-                if (!node) {
-                    return false;
+        function getReturnTypeFromBody(func, checkMode) {
+            var contextualSignature = getContextualSignatureForFunctionLikeDeclaration(func);
+            if (!func.body) {
+                return unknownType;
+            }
+            var functionFlags = ts.getFunctionFlags(func);
+            var type;
+            if (func.body.kind !== 207 /* Block */) {
+                type = checkExpressionCached(func.body, checkMode);
+                if (functionFlags & 2 /* Async */) {
+                    // From within an async function you can return either a non-promise value or a promise. Any
+                    // Promise/A+ compatible implementation will always assimilate any foreign promise, so the
+                    // return type of the body should be unwrapped to its awaited type, which we will wrap in
+                    // the native Promise<T> type later in this function.
+                    type = checkAwaitedType(type, /*errorNode*/ func, ts.Diagnostics.The_return_type_of_an_async_function_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member);
                 }
-                if (ts.isFunctionLike(node) && getNodeLinks(node).flags & 4194304 /* AssignmentsMarked */) {
-                    return true;
+            }
+            else {
+                var types = void 0;
+                if (functionFlags & 1 /* Generator */) {
+                    types = ts.concatenate(checkAndAggregateYieldOperandTypes(func, checkMode), checkAndAggregateReturnExpressionTypes(func, checkMode));
+                    if (!types || types.length === 0) {
+                        var iterableIteratorAny = functionFlags & 2 /* Async */
+                            ? createAsyncIterableIteratorType(anyType) // AsyncGenerator function
+                            : createIterableIteratorType(anyType); // Generator function
+                        if (noImplicitAny) {
+                            error(func.asteriskToken, ts.Diagnostics.Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_type, typeToString(iterableIteratorAny));
+                        }
+                        return iterableIteratorAny;
+                    }
+                }
+                else {
+                    types = checkAndAggregateReturnExpressionTypes(func, checkMode);
+                    if (!types) {
+                        // For an async function, the return type will not be never, but rather a Promise for never.
+                        return functionFlags & 2 /* Async */
+                            ? createPromiseReturnType(func, neverType) // Async function
+                            : neverType; // Normal function
+                    }
+                    if (types.length === 0) {
+                        // For an async function, the return type will not be void, but rather a Promise for void.
+                        return functionFlags & 2 /* Async */
+                            ? createPromiseReturnType(func, voidType) // Async function
+                            : voidType; // Normal function
+                    }
+                }
+                // Return a union of the return expression types.
+                type = getUnionType(types, /*subtypeReduction*/ true);
+                if (functionFlags & 1 /* Generator */) {
+                    type = functionFlags & 2 /* Async */
+                        ? createAsyncIterableIteratorType(type) // AsyncGenerator function
+                        : createIterableIteratorType(type); // Generator function
                 }
             }
+            if (!contextualSignature) {
+                reportErrorsFromWidening(func, type);
+            }
+            if (isUnitType(type) &&
+                !(contextualSignature &&
+                    isLiteralContextualType(contextualSignature === getSignatureFromDeclaration(func) ? type : getReturnTypeOfSignature(contextualSignature)))) {
+                type = getWidenedLiteralType(type);
+            }
+            var widenedType = getWidenedType(type);
+            // From within an async function you can return either a non-promise value or a promise. Any
+            // Promise/A+ compatible implementation will always assimilate any foreign promise, so the
+            // return type of the body is awaited type of the body, wrapped in a native Promise<T> type.
+            return (functionFlags & 3 /* AsyncGenerator */) === 2 /* Async */
+                ? createPromiseReturnType(func, widenedType) // Async function
+                : widenedType; // Generator function, AsyncGenerator function, or normal function
         }
-        function markParameterAssignments(node) {
-            if (node.kind === 69 /* Identifier */) {
-                if (ts.isAssignmentTarget(node)) {
-                    var symbol = getResolvedSymbol(node);
-                    if (symbol.valueDeclaration && ts.getRootDeclaration(symbol.valueDeclaration).kind === 142 /* Parameter */) {
-                        symbol.isAssigned = true;
+        function checkAndAggregateYieldOperandTypes(func, checkMode) {
+            var aggregatedTypes = [];
+            var functionFlags = ts.getFunctionFlags(func);
+            ts.forEachYieldExpression(func.body, function (yieldExpression) {
+                var expr = yieldExpression.expression;
+                if (expr) {
+                    var type = checkExpressionCached(expr, checkMode);
+                    if (yieldExpression.asteriskToken) {
+                        // A yield* expression effectively yields everything that its operand yields
+                        type = checkIteratedTypeOrElementType(type, yieldExpression.expression, /*allowStringInput*/ false, (functionFlags & 2 /* Async */) !== 0);
+                    }
+                    if (functionFlags & 2 /* Async */) {
+                        type = checkAwaitedType(type, expr, yieldExpression.asteriskToken
+                            ? ts.Diagnostics.Type_of_iterated_elements_of_a_yield_Asterisk_operand_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member
+                            : ts.Diagnostics.Type_of_yield_operand_in_an_async_generator_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member);
+                    }
+                    if (!ts.contains(aggregatedTypes, type)) {
+                        aggregatedTypes.push(type);
                     }
                 }
+            });
+            return aggregatedTypes;
+        }
+        function isExhaustiveSwitchStatement(node) {
+            if (!node.possiblyExhaustive) {
+                return false;
             }
-            else {
-                ts.forEachChild(node, markParameterAssignments);
+            var type = getTypeOfExpression(node.expression);
+            if (!isLiteralType(type)) {
+                return false;
+            }
+            var switchTypes = getSwitchClauseTypes(node);
+            if (!switchTypes.length) {
+                return false;
             }
+            return eachTypeContainedIn(mapType(type, getRegularTypeOfLiteralType), switchTypes);
         }
-        function checkIdentifier(node) {
-            var symbol = getResolvedSymbol(node);
-            // As noted in ECMAScript 6 language spec, arrow functions never have an arguments objects.
-            // Although in down-level emit of arrow function, we emit it using function expression which means that
-            // arguments objects will be bound to the inner object; emitting arrow function natively in ES6, arguments objects
-            // will be bound to non-arrow function that contain this arrow function. This results in inconsistent behavior.
-            // To avoid that we will give an error to users if they use arguments objects in arrow function so that they
-            // can explicitly bound arguments objects
-            if (symbol === argumentsSymbol) {
-                var container = ts.getContainingFunction(node);
-                if (languageVersion < 2 /* ES6 */) {
-                    if (container.kind === 180 /* ArrowFunction */) {
-                        error(node, ts.Diagnostics.The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_standard_function_expression);
+        function functionHasImplicitReturn(func) {
+            if (!(func.flags & 128 /* HasImplicitReturn */)) {
+                return false;
+            }
+            var lastStatement = ts.lastOrUndefined(func.body.statements);
+            if (lastStatement && lastStatement.kind === 221 /* SwitchStatement */ && isExhaustiveSwitchStatement(lastStatement)) {
+                return false;
+            }
+            return true;
+        }
+        function checkAndAggregateReturnExpressionTypes(func, checkMode) {
+            var functionFlags = ts.getFunctionFlags(func);
+            var aggregatedTypes = [];
+            var hasReturnWithNoExpression = functionHasImplicitReturn(func);
+            var hasReturnOfTypeNever = false;
+            ts.forEachReturnStatement(func.body, function (returnStatement) {
+                var expr = returnStatement.expression;
+                if (expr) {
+                    var type = checkExpressionCached(expr, checkMode);
+                    if (functionFlags & 2 /* Async */) {
+                        // From within an async function you can return either a non-promise value or a promise. Any
+                        // Promise/A+ compatible implementation will always assimilate any foreign promise, so the
+                        // return type of the body should be unwrapped to its awaited type, which should be wrapped in
+                        // the native Promise<T> type by the caller.
+                        type = checkAwaitedType(type, func, ts.Diagnostics.The_return_type_of_an_async_function_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member);
                     }
-                    else if (ts.hasModifier(container, 256 /* Async */)) {
-                        error(node, ts.Diagnostics.The_arguments_object_cannot_be_referenced_in_an_async_function_or_method_in_ES3_and_ES5_Consider_using_a_standard_function_or_method);
+                    if (type.flags & 8192 /* Never */) {
+                        hasReturnOfTypeNever = true;
+                    }
+                    else if (!ts.contains(aggregatedTypes, type)) {
+                        aggregatedTypes.push(type);
                     }
                 }
-                if (node.flags & 262144 /* AwaitContext */) {
-                    getNodeLinks(container).flags |= 8192 /* CaptureArguments */;
+                else {
+                    hasReturnWithNoExpression = true;
                 }
+            });
+            if (aggregatedTypes.length === 0 && !hasReturnWithNoExpression && (hasReturnOfTypeNever ||
+                func.kind === 186 /* FunctionExpression */ || func.kind === 187 /* ArrowFunction */)) {
+                return undefined;
             }
-            if (symbol.flags & 8388608 /* Alias */ && !isInTypeQuery(node) && !isConstEnumOrConstEnumOnlyModule(resolveAlias(symbol))) {
-                markAliasSymbolAsReferenced(symbol);
+            if (strictNullChecks && aggregatedTypes.length && hasReturnWithNoExpression) {
+                if (!ts.contains(aggregatedTypes, undefinedType)) {
+                    aggregatedTypes.push(undefinedType);
+                }
             }
-            var localOrExportSymbol = getExportSymbolOfValueSymbolIfExported(symbol);
-            if (localOrExportSymbol.flags & 32 /* Class */) {
-                var declaration_1 = localOrExportSymbol.valueDeclaration;
-                // Due to the emit for class decorators, any reference to the class from inside of the class body
-                // must instead be rewritten to point to a temporary variable to avoid issues with the double-bind
-                // behavior of class names in ES6.
-                if (languageVersion === 2 /* ES6 */
-                    && declaration_1.kind === 221 /* ClassDeclaration */
-                    && ts.nodeIsDecorated(declaration_1)) {
-                    var container = ts.getContainingClass(node);
-                    while (container !== undefined) {
-                        if (container === declaration_1 && container.name !== node) {
-                            getNodeLinks(declaration_1).flags |= 8388608 /* ClassWithConstructorReference */;
-                            getNodeLinks(node).flags |= 16777216 /* ConstructorReferenceInClass */;
-                            break;
-                        }
-                        container = ts.getContainingClass(container);
+            return aggregatedTypes;
+        }
+        /**
+         * TypeScript Specification 1.0 (6.3) - July 2014
+         *   An explicitly typed function whose return type isn't the Void type,
+         *   the Any type, or a union type containing the Void or Any type as a constituent
+         *   must have at least one return statement somewhere in its body.
+         *   An exception to this rule is if the function implementation consists of a single 'throw' statement.
+         *
+         * @param returnType - return type of the function, can be undefined if return type is not explicitly specified
+         */
+        function checkAllCodePathsInNonVoidFunctionReturnOrThrow(func, returnType) {
+            if (!produceDiagnostics) {
+                return;
+            }
+            // Functions with with an explicitly specified 'void' or 'any' return type don't need any return expressions.
+            if (returnType && maybeTypeOfKind(returnType, 1 /* Any */ | 1024 /* Void */)) {
+                return;
+            }
+            // If all we have is a function signature, or an arrow function with an expression body, then there is nothing to check.
+            // also if HasImplicitReturn flag is not set this means that all codepaths in function body end with return or throw
+            if (ts.nodeIsMissing(func.body) || func.body.kind !== 207 /* Block */ || !functionHasImplicitReturn(func)) {
+                return;
+            }
+            var hasExplicitReturn = func.flags & 256 /* HasExplicitReturn */;
+            if (returnType && returnType.flags & 8192 /* Never */) {
+                error(ts.getEffectiveReturnTypeNode(func), ts.Diagnostics.A_function_returning_never_cannot_have_a_reachable_end_point);
+            }
+            else if (returnType && !hasExplicitReturn) {
+                // minimal check: function has syntactic return type annotation and no explicit return statements in the body
+                // this function does not conform to the specification.
+                // NOTE: having returnType !== undefined is a precondition for entering this branch so func.type will always be present
+                error(ts.getEffectiveReturnTypeNode(func), ts.Diagnostics.A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value);
+            }
+            else if (returnType && strictNullChecks && !isTypeAssignableTo(undefinedType, returnType)) {
+                error(ts.getEffectiveReturnTypeNode(func), ts.Diagnostics.Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined);
+            }
+            else if (compilerOptions.noImplicitReturns) {
+                if (!returnType) {
+                    // If return type annotation is omitted check if function has any explicit return statements.
+                    // If it does not have any - its inferred return type is void - don't do any checks.
+                    // Otherwise get inferred return type from function body and report error only if it is not void / anytype
+                    if (!hasExplicitReturn) {
+                        return;
+                    }
+                    var inferredReturnType = getReturnTypeOfSignature(getSignatureFromDeclaration(func));
+                    if (isUnwrappedReturnTypeVoidOrAny(func, inferredReturnType)) {
+                        return;
                     }
                 }
-                else if (declaration_1.kind === 192 /* ClassExpression */) {
-                    // When we emit a class expression with static members that contain a reference
-                    // to the constructor in the initializer, we will need to substitute that
-                    // binding with an alias as the class name is not in scope.
-                    var container = ts.getThisContainer(node, /*includeArrowFunctions*/ false);
-                    while (container !== undefined) {
-                        if (container.parent === declaration_1) {
-                            if (container.kind === 145 /* PropertyDeclaration */ && ts.hasModifier(container, 32 /* Static */)) {
-                                getNodeLinks(declaration_1).flags |= 8388608 /* ClassWithConstructorReference */;
-                                getNodeLinks(node).flags |= 16777216 /* ConstructorReferenceInClass */;
+                error(ts.getEffectiveReturnTypeNode(func) || func, ts.Diagnostics.Not_all_code_paths_return_a_value);
+            }
+        }
+        function checkFunctionExpressionOrObjectLiteralMethod(node, checkMode) {
+            ts.Debug.assert(node.kind !== 151 /* MethodDeclaration */ || ts.isObjectLiteralMethod(node));
+            // Grammar checking
+            var hasGrammarError = checkGrammarFunctionLikeDeclaration(node);
+            if (!hasGrammarError && node.kind === 186 /* FunctionExpression */) {
+                checkGrammarForGenerator(node);
+            }
+            // The identityMapper object is used to indicate that function expressions are wildcards
+            if (checkMode === 1 /* SkipContextSensitive */ && isContextSensitive(node)) {
+                checkNodeDeferred(node);
+                return anyFunctionType;
+            }
+            var links = getNodeLinks(node);
+            var type = getTypeOfSymbol(node.symbol);
+            // Check if function expression is contextually typed and assign parameter types if so.
+            if (!(links.flags & 1024 /* ContextChecked */)) {
+                var contextualSignature = getContextualSignature(node);
+                // If a type check is started at a function expression that is an argument of a function call, obtaining the
+                // contextual type may recursively get back to here during overload resolution of the call. If so, we will have
+                // already assigned contextual types.
+                if (!(links.flags & 1024 /* ContextChecked */)) {
+                    links.flags |= 1024 /* ContextChecked */;
+                    if (contextualSignature) {
+                        var signature = getSignaturesOfType(type, 0 /* Call */)[0];
+                        if (isContextSensitive(node)) {
+                            var contextualMapper = getContextualMapper(node);
+                            if (checkMode === 2 /* Inferential */) {
+                                inferFromAnnotatedParameters(signature, contextualSignature, contextualMapper);
+                            }
+                            var instantiatedContextualSignature = contextualMapper === identityMapper ?
+                                contextualSignature : instantiateSignature(contextualSignature, contextualMapper);
+                            assignContextualParameterTypes(signature, instantiatedContextualSignature);
+                        }
+                        if (!ts.getEffectiveReturnTypeNode(node) && !signature.resolvedReturnType) {
+                            var returnType = getReturnTypeFromBody(node, checkMode);
+                            if (!signature.resolvedReturnType) {
+                                signature.resolvedReturnType = returnType;
                             }
-                            break;
                         }
-                        container = ts.getThisContainer(container, /*includeArrowFunctions*/ false);
                     }
+                    checkSignatureDeclaration(node);
+                    checkNodeDeferred(node);
                 }
             }
-            checkCollisionWithCapturedSuperVariable(node, node);
-            checkCollisionWithCapturedThisVariable(node, node);
-            checkNestedBlockScopedBinding(node, symbol);
-            var type = getTypeOfSymbol(localOrExportSymbol);
-            var declaration = localOrExportSymbol.valueDeclaration;
-            // We only narrow variables and parameters occurring in a non-assignment position. For all other
-            // entities we simply return the declared type.
-            if (!(localOrExportSymbol.flags & 3 /* Variable */) || ts.isAssignmentTarget(node) || !declaration) {
-                return type;
-            }
-            // The declaration container is the innermost function that encloses the declaration of the variable
-            // or parameter. The flow container is the innermost function starting with which we analyze the control
-            // flow graph to determine the control flow based type.
-            var isParameter = ts.getRootDeclaration(declaration).kind === 142 /* Parameter */;
-            var declarationContainer = getControlFlowContainer(declaration);
-            var flowContainer = getControlFlowContainer(node);
-            var isOuterVariable = flowContainer !== declarationContainer;
-            // When the control flow originates in a function expression or arrow function and we are referencing
-            // a const variable or parameter from an outer function, we extend the origin of the control flow
-            // analysis to include the immediately enclosing function.
-            while (flowContainer !== declarationContainer &&
-                (flowContainer.kind === 179 /* FunctionExpression */ || flowContainer.kind === 180 /* ArrowFunction */) &&
-                (isReadonlySymbol(localOrExportSymbol) || isParameter && !isParameterAssigned(localOrExportSymbol))) {
-                flowContainer = getControlFlowContainer(flowContainer);
-            }
-            // We only look for uninitialized variables in strict null checking mode, and only when we can analyze
-            // the entire control flow graph from the variable's declaration (i.e. when the flow container and
-            // declaration container are the same).
-            var assumeInitialized = !strictNullChecks || (type.flags & 1 /* Any */) !== 0 || isParameter ||
-                isOuterVariable || ts.isInAmbientContext(declaration);
-            var flowType = getFlowTypeOfReference(node, type, assumeInitialized, flowContainer);
-            // A variable is considered uninitialized when it is possible to analyze the entire control flow graph
-            // from declaration to use, and when the variable's declared type doesn't include undefined but the
-            // control flow based type does include undefined.
-            if (!assumeInitialized && !(getFalsyFlags(type) & 2048 /* Undefined */) && getFalsyFlags(flowType) & 2048 /* Undefined */) {
-                error(node, ts.Diagnostics.Variable_0_is_used_before_being_assigned, symbolToString(symbol));
-                // Return the declared type to reduce follow-on errors
-                return type;
+            if (produceDiagnostics && node.kind !== 151 /* MethodDeclaration */) {
+                checkCollisionWithCapturedSuperVariable(node, node.name);
+                checkCollisionWithCapturedThisVariable(node, node.name);
+                checkCollisionWithCapturedNewTargetVariable(node, node.name);
             }
-            return flowType;
+            return type;
         }
-        function isInsideFunction(node, threshold) {
-            var current = node;
-            while (current && current !== threshold) {
-                if (ts.isFunctionLike(current)) {
-                    return true;
+        function checkFunctionExpressionOrObjectLiteralMethodDeferred(node) {
+            ts.Debug.assert(node.kind !== 151 /* MethodDeclaration */ || ts.isObjectLiteralMethod(node));
+            var functionFlags = ts.getFunctionFlags(node);
+            var returnTypeNode = ts.getEffectiveReturnTypeNode(node);
+            var returnOrPromisedType = returnTypeNode &&
+                ((functionFlags & 3 /* AsyncGenerator */) === 2 /* Async */ ?
+                    checkAsyncFunctionReturnType(node) :
+                    getTypeFromTypeNode(returnTypeNode)); // AsyncGenerator function, Generator function, or normal function
+            if ((functionFlags & 1 /* Generator */) === 0) {
+                // return is not necessary in the body of generators
+                checkAllCodePathsInNonVoidFunctionReturnOrThrow(node, returnOrPromisedType);
+            }
+            if (node.body) {
+                if (!returnTypeNode) {
+                    // There are some checks that are only performed in getReturnTypeFromBody, that may produce errors
+                    // we need. An example is the noImplicitAny errors resulting from widening the return expression
+                    // of a function. Because checking of function expression bodies is deferred, there was never an
+                    // appropriate time to do this during the main walk of the file (see the comment at the top of
+                    // checkFunctionExpressionBodies). So it must be done now.
+                    getReturnTypeOfSignature(getSignatureFromDeclaration(node));
                 }
-                current = current.parent;
+                if (node.body.kind === 207 /* Block */) {
+                    checkSourceElement(node.body);
+                }
+                else {
+                    // From within an async function you can return either a non-promise value or a promise. Any
+                    // Promise/A+ compatible implementation will always assimilate any foreign promise, so we
+                    // should not be checking assignability of a promise to the return type. Instead, we need to
+                    // check assignability of the awaited type of the expression body against the promised type of
+                    // its return type annotation.
+                    var exprType = checkExpression(node.body);
+                    if (returnOrPromisedType) {
+                        if ((functionFlags & 3 /* AsyncGenerator */) === 2 /* Async */) {
+                            var awaitedType = checkAwaitedType(exprType, node.body, ts.Diagnostics.The_return_type_of_an_async_function_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member);
+                            checkTypeAssignableTo(awaitedType, returnOrPromisedType, node.body);
+                        }
+                        else {
+                            checkTypeAssignableTo(exprType, returnOrPromisedType, node.body);
+                        }
+                    }
+                }
+                registerForUnusedIdentifiersCheck(node);
             }
-            return false;
         }
-        function checkNestedBlockScopedBinding(node, symbol) {
-            if (languageVersion >= 2 /* ES6 */ ||
-                (symbol.flags & (2 /* BlockScopedVariable */ | 32 /* Class */)) === 0 ||
-                symbol.valueDeclaration.parent.kind === 252 /* CatchClause */) {
-                return;
+        function checkArithmeticOperandType(operand, type, diagnostic) {
+            if (!isTypeAnyOrAllConstituentTypesHaveKind(type, 84 /* NumberLike */)) {
+                error(operand, diagnostic);
+                return false;
             }
-            // 1. walk from the use site up to the declaration and check
-            // if there is anything function like between declaration and use-site (is binding/class is captured in function).
-            // 2. walk from the declaration up to the boundary of lexical environment and check
-            // if there is an iteration statement in between declaration and boundary (is binding/class declared inside iteration statement)
-            var container = ts.getEnclosingBlockScopeContainer(symbol.valueDeclaration);
-            var usedInFunction = isInsideFunction(node.parent, container);
-            var current = container;
-            var containedInIterationStatement = false;
-            while (current && !ts.nodeStartsNewLexicalEnvironment(current)) {
-                if (ts.isIterationStatement(current, /*lookInLabeledStatements*/ false)) {
-                    containedInIterationStatement = true;
-                    break;
+            return true;
+        }
+        function isReadonlySymbol(symbol) {
+            // The following symbols are considered read-only:
+            // Properties with a 'readonly' modifier
+            // Variables declared with 'const'
+            // Get accessors without matching set accessors
+            // Enum members
+            // Unions and intersections of the above (unions and intersections eagerly set isReadonly on creation)
+            return !!(ts.getCheckFlags(symbol) & 8 /* Readonly */ ||
+                symbol.flags & 4 /* Property */ && ts.getDeclarationModifierFlagsFromSymbol(symbol) & 64 /* Readonly */ ||
+                symbol.flags & 3 /* Variable */ && getDeclarationNodeFlagsFromSymbol(symbol) & 2 /* Const */ ||
+                symbol.flags & 98304 /* Accessor */ && !(symbol.flags & 65536 /* SetAccessor */) ||
+                symbol.flags & 8 /* EnumMember */);
+        }
+        function isReferenceToReadonlyEntity(expr, symbol) {
+            if (isReadonlySymbol(symbol)) {
+                // Allow assignments to readonly properties within constructors of the same class declaration.
+                if (symbol.flags & 4 /* Property */ &&
+                    (expr.kind === 179 /* PropertyAccessExpression */ || expr.kind === 180 /* ElementAccessExpression */) &&
+                    expr.expression.kind === 99 /* ThisKeyword */) {
+                    // Look for if this is the constructor for the class that `symbol` is a property of.
+                    var func = ts.getContainingFunction(expr);
+                    if (!(func && func.kind === 152 /* Constructor */)) {
+                        return true;
+                    }
+                    // If func.parent is a class and symbol is a (readonly) property of that class, or
+                    // if func is a constructor and symbol is a (readonly) parameter property declared in it,
+                    // then symbol is writeable here.
+                    return !(func.parent === symbol.valueDeclaration.parent || func === symbol.valueDeclaration.parent);
                 }
-                current = current.parent;
+                return true;
             }
-            if (containedInIterationStatement) {
-                if (usedInFunction) {
-                    // mark iteration statement as containing block-scoped binding captured in some function
-                    getNodeLinks(current).flags |= 65536 /* LoopWithCapturedBlockScopedBinding */;
-                }
-                // mark variables that are declared in loop initializer and reassigned inside the body of ForStatement.
-                // if body of ForStatement will be converted to function then we'll need a extra machinery to propagate reassigned values back.
-                if (container.kind === 206 /* ForStatement */ &&
-                    ts.getAncestor(symbol.valueDeclaration, 219 /* VariableDeclarationList */).parent === container &&
-                    isAssignedInBodyOfForStatement(node, container)) {
-                    getNodeLinks(symbol.valueDeclaration).flags |= 2097152 /* NeedsLoopOutParameter */;
+            return false;
+        }
+        function isReferenceThroughNamespaceImport(expr) {
+            if (expr.kind === 179 /* PropertyAccessExpression */ || expr.kind === 180 /* ElementAccessExpression */) {
+                var node = ts.skipParentheses(expr.expression);
+                if (node.kind === 71 /* Identifier */) {
+                    var symbol = getNodeLinks(node).resolvedSymbol;
+                    if (symbol.flags & 8388608 /* Alias */) {
+                        var declaration = getDeclarationOfAliasSymbol(symbol);
+                        return declaration && declaration.kind === 240 /* NamespaceImport */;
+                    }
                 }
-                // set 'declared inside loop' bit on the block-scoped binding
-                getNodeLinks(symbol.valueDeclaration).flags |= 262144 /* BlockScopedBindingInLoop */;
-            }
-            if (usedInFunction) {
-                getNodeLinks(symbol.valueDeclaration).flags |= 131072 /* CapturedBlockScopedBinding */;
             }
+            return false;
         }
-        function isAssignedInBodyOfForStatement(node, container) {
-            var current = node;
-            // skip parenthesized nodes
-            while (current.parent.kind === 178 /* ParenthesizedExpression */) {
-                current = current.parent;
-            }
-            // check if node is used as LHS in some assignment expression
-            var isAssigned = false;
-            if (ts.isAssignmentTarget(current)) {
-                isAssigned = true;
+        function checkReferenceExpression(expr, invalidReferenceMessage) {
+            // References are combinations of identifiers, parentheses, and property accesses.
+            var node = ts.skipOuterExpressions(expr, 2 /* Assertions */ | 1 /* Parentheses */);
+            if (node.kind !== 71 /* Identifier */ && node.kind !== 179 /* PropertyAccessExpression */ && node.kind !== 180 /* ElementAccessExpression */) {
+                error(expr, invalidReferenceMessage);
+                return false;
             }
-            else if ((current.parent.kind === 185 /* PrefixUnaryExpression */ || current.parent.kind === 186 /* PostfixUnaryExpression */)) {
-                var expr = current.parent;
-                isAssigned = expr.operator === 41 /* PlusPlusToken */ || expr.operator === 42 /* MinusMinusToken */;
+            return true;
+        }
+        function checkDeleteExpression(node) {
+            checkExpression(node.expression);
+            var expr = ts.skipParentheses(node.expression);
+            if (expr.kind !== 179 /* PropertyAccessExpression */ && expr.kind !== 180 /* ElementAccessExpression */) {
+                error(expr, ts.Diagnostics.The_operand_of_a_delete_operator_must_be_a_property_reference);
+                return booleanType;
             }
-            if (!isAssigned) {
-                return false;
+            var links = getNodeLinks(expr);
+            var symbol = getExportSymbolOfValueSymbolIfExported(links.resolvedSymbol);
+            if (symbol && isReadonlySymbol(symbol)) {
+                error(expr, ts.Diagnostics.The_operand_of_a_delete_operator_cannot_be_a_read_only_property);
             }
-            // at this point we know that node is the target of assignment
-            // now check that modification happens inside the statement part of the ForStatement
-            while (current !== container) {
-                if (current === container.statement) {
-                    return true;
+            return booleanType;
+        }
+        function checkTypeOfExpression(node) {
+            checkExpression(node.expression);
+            return typeofType;
+        }
+        function checkVoidExpression(node) {
+            checkExpression(node.expression);
+            return undefinedWideningType;
+        }
+        function checkAwaitExpression(node) {
+            // Grammar checking
+            if (produceDiagnostics) {
+                if (!(node.flags & 16384 /* AwaitContext */)) {
+                    grammarErrorOnFirstToken(node, ts.Diagnostics.await_expression_is_only_allowed_within_an_async_function);
                 }
-                else {
-                    current = current.parent;
+                if (isInParameterInitializerBeforeContainingFunction(node)) {
+                    error(node, ts.Diagnostics.await_expressions_cannot_be_used_in_a_parameter_initializer);
                 }
             }
-            return false;
+            var operandType = checkExpression(node.expression);
+            return checkAwaitedType(operandType, node, ts.Diagnostics.Type_of_await_operand_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member);
         }
-        function captureLexicalThis(node, container) {
-            getNodeLinks(node).flags |= 2 /* LexicalThis */;
-            if (container.kind === 145 /* PropertyDeclaration */ || container.kind === 148 /* Constructor */) {
-                var classNode = container.parent;
-                getNodeLinks(classNode).flags |= 4 /* CaptureThis */;
+        function checkPrefixUnaryExpression(node) {
+            var operandType = checkExpression(node.operand);
+            if (operandType === silentNeverType) {
+                return silentNeverType;
             }
-            else {
-                getNodeLinks(container).flags |= 4 /* CaptureThis */;
+            if (node.operator === 38 /* MinusToken */ && node.operand.kind === 8 /* NumericLiteral */) {
+                return getFreshTypeOfLiteralType(getLiteralType(-node.operand.text));
+            }
+            switch (node.operator) {
+                case 37 /* PlusToken */:
+                case 38 /* MinusToken */:
+                case 52 /* TildeToken */:
+                    checkNonNullType(operandType, node.operand);
+                    if (maybeTypeOfKind(operandType, 512 /* ESSymbol */)) {
+                        error(node.operand, ts.Diagnostics.The_0_operator_cannot_be_applied_to_type_symbol, ts.tokenToString(node.operator));
+                    }
+                    return numberType;
+                case 51 /* ExclamationToken */:
+                    var facts = getTypeFacts(operandType) & (1048576 /* Truthy */ | 2097152 /* Falsy */);
+                    return facts === 1048576 /* Truthy */ ? falseType :
+                        facts === 2097152 /* Falsy */ ? trueType :
+                            booleanType;
+                case 43 /* PlusPlusToken */:
+                case 44 /* MinusMinusToken */:
+                    var ok = checkArithmeticOperandType(node.operand, checkNonNullType(operandType, node.operand), ts.Diagnostics.An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type);
+                    if (ok) {
+                        // run check only if former checks succeeded to avoid reporting cascading errors
+                        checkReferenceExpression(node.operand, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_or_a_property_access);
+                    }
+                    return numberType;
             }
+            return unknownType;
         }
-        function findFirstSuperCall(n) {
-            if (ts.isSuperCallExpression(n)) {
-                return n;
+        function checkPostfixUnaryExpression(node) {
+            var operandType = checkExpression(node.operand);
+            if (operandType === silentNeverType) {
+                return silentNeverType;
             }
-            else if (ts.isFunctionLike(n)) {
-                return undefined;
+            var ok = checkArithmeticOperandType(node.operand, checkNonNullType(operandType, node.operand), ts.Diagnostics.An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type);
+            if (ok) {
+                // run check only if former checks succeeded to avoid reporting cascading errors
+                checkReferenceExpression(node.operand, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_or_a_property_access);
             }
-            return ts.forEachChild(n, findFirstSuperCall);
+            return numberType;
         }
-        /**
-         * Return a cached result if super-statement is already found.
-         * Otherwise, find a super statement in a given constructor function and cache the result in the node-links of the constructor
-         *
-         * @param constructor constructor-function to look for super statement
-         */
-        function getSuperCallInConstructor(constructor) {
-            var links = getNodeLinks(constructor);
-            // Only trying to find super-call if we haven't yet tried to find one.  Once we try, we will record the result
-            if (links.hasSuperCall === undefined) {
-                links.superCall = findFirstSuperCall(constructor.body);
-                links.hasSuperCall = links.superCall ? true : false;
+        // Return true if type might be of the given kind. A union or intersection type might be of a given
+        // kind if at least one constituent type is of the given kind.
+        function maybeTypeOfKind(type, kind) {
+            if (type.flags & kind) {
+                return true;
             }
-            return links.superCall;
-        }
-        /**
-         * Check if the given class-declaration extends null then return true.
-         * Otherwise, return false
-         * @param classDecl a class declaration to check if it extends null
-         */
-        function classDeclarationExtendsNull(classDecl) {
-            var classSymbol = getSymbolOfNode(classDecl);
-            var classInstanceType = getDeclaredTypeOfSymbol(classSymbol);
-            var baseConstructorType = getBaseConstructorTypeOfClass(classInstanceType);
-            return baseConstructorType === nullWideningType;
-        }
-        function checkThisExpression(node) {
-            // Stop at the first arrow function so that we can
-            // tell whether 'this' needs to be captured.
-            var container = ts.getThisContainer(node, /* includeArrowFunctions */ true);
-            var needToCaptureLexicalThis = false;
-            if (container.kind === 148 /* Constructor */) {
-                var containingClassDecl = container.parent;
-                var baseTypeNode = ts.getClassExtendsHeritageClauseElement(containingClassDecl);
-                // If a containing class does not have extends clause or the class extends null
-                // skip checking whether super statement is called before "this" accessing.
-                if (baseTypeNode && !classDeclarationExtendsNull(containingClassDecl)) {
-                    var superCall = getSuperCallInConstructor(container);
-                    // We should give an error in the following cases:
-                    //      - No super-call
-                    //      - "this" is accessing before super-call.
-                    //          i.e super(this)
-                    //              this.x; super();
-                    // We want to make sure that super-call is done before accessing "this" so that
-                    // "this" is not accessed as a parameter of the super-call.
-                    if (!superCall || superCall.end > node.pos) {
-                        // In ES6, super inside constructor of class-declaration has to precede "this" accessing
-                        error(node, ts.Diagnostics.super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class);
+            if (type.flags & 196608 /* UnionOrIntersection */) {
+                var types = type.types;
+                for (var _i = 0, types_17 = types; _i < types_17.length; _i++) {
+                    var t = types_17[_i];
+                    if (maybeTypeOfKind(t, kind)) {
+                        return true;
                     }
                 }
             }
-            // Now skip arrow functions to get the "real" owner of 'this'.
-            if (container.kind === 180 /* ArrowFunction */) {
-                container = ts.getThisContainer(container, /* includeArrowFunctions */ false);
-                // When targeting es6, arrow function lexically bind "this" so we do not need to do the work of binding "this" in emitted code
-                needToCaptureLexicalThis = (languageVersion < 2 /* ES6 */);
+            return false;
+        }
+        // Return true if type is of the given kind. A union type is of a given kind if all constituent types
+        // are of the given kind. An intersection type is of a given kind if at least one constituent type is
+        // of the given kind.
+        function isTypeOfKind(type, kind) {
+            if (type.flags & kind) {
+                return true;
             }
-            switch (container.kind) {
-                case 225 /* ModuleDeclaration */:
-                    error(node, ts.Diagnostics.this_cannot_be_referenced_in_a_module_or_namespace_body);
-                    // do not return here so in case if lexical this is captured - it will be reflected in flags on NodeLinks
-                    break;
-                case 224 /* EnumDeclaration */:
-                    error(node, ts.Diagnostics.this_cannot_be_referenced_in_current_location);
-                    // do not return here so in case if lexical this is captured - it will be reflected in flags on NodeLinks
-                    break;
-                case 148 /* Constructor */:
-                    if (isInConstructorArgumentInitializer(node, container)) {
-                        error(node, ts.Diagnostics.this_cannot_be_referenced_in_constructor_arguments);
-                    }
-                    break;
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
-                    if (ts.getModifierFlags(container) & 32 /* Static */) {
-                        error(node, ts.Diagnostics.this_cannot_be_referenced_in_a_static_property_initializer);
+            if (type.flags & 65536 /* Union */) {
+                var types = type.types;
+                for (var _i = 0, types_18 = types; _i < types_18.length; _i++) {
+                    var t = types_18[_i];
+                    if (!isTypeOfKind(t, kind)) {
+                        return false;
                     }
-                    break;
-                case 140 /* ComputedPropertyName */:
-                    error(node, ts.Diagnostics.this_cannot_be_referenced_in_a_computed_property_name);
-                    break;
-            }
-            if (needToCaptureLexicalThis) {
-                captureLexicalThis(node, container);
+                }
+                return true;
             }
-            if (ts.isFunctionLike(container) &&
-                (!isInParameterInitializerBeforeContainingFunction(node) || getFunctionLikeThisParameter(container))) {
-                // Note: a parameter initializer should refer to class-this unless function-this is explicitly annotated.
-                // If this is a function in a JS file, it might be a class method. Check if it's the RHS
-                // of a x.prototype.y = function [name]() { .... }
-                if (container.kind === 179 /* FunctionExpression */ &&
-                    ts.isInJavaScriptFile(container.parent) &&
-                    ts.getSpecialPropertyAssignmentKind(container.parent) === 3 /* PrototypeProperty */) {
-                    // Get the 'x' of 'x.prototype.y = f' (here, 'f' is 'container')
-                    var className = container.parent // x.prototype.y = f
-                        .left // x.prototype.y
-                        .expression // x.prototype
-                        .expression; // x
-                    var classSymbol = checkExpression(className).symbol;
-                    if (classSymbol && classSymbol.members && (classSymbol.flags & 16 /* Function */)) {
-                        return getInferredClassType(classSymbol);
+            if (type.flags & 131072 /* Intersection */) {
+                var types = type.types;
+                for (var _a = 0, types_19 = types; _a < types_19.length; _a++) {
+                    var t = types_19[_a];
+                    if (isTypeOfKind(t, kind)) {
+                        return true;
                     }
                 }
-                var thisType = getThisTypeOfDeclaration(container);
-                if (thisType) {
-                    return thisType;
-                }
             }
-            if (ts.isClassLike(container.parent)) {
-                var symbol = getSymbolOfNode(container.parent);
-                var type = ts.hasModifier(container, 32 /* Static */) ? getTypeOfSymbol(symbol) : getDeclaredTypeOfSymbol(symbol).thisType;
-                return getFlowTypeOfReference(node, type, /*assumeInitialized*/ true, /*flowContainer*/ undefined);
+            return false;
+        }
+        function isConstEnumObjectType(type) {
+            return getObjectFlags(type) & 16 /* Anonymous */ && type.symbol && isConstEnumSymbol(type.symbol);
+        }
+        function isConstEnumSymbol(symbol) {
+            return (symbol.flags & 128 /* ConstEnum */) !== 0;
+        }
+        function checkInstanceOfExpression(left, right, leftType, rightType) {
+            if (leftType === silentNeverType || rightType === silentNeverType) {
+                return silentNeverType;
             }
-            if (ts.isInJavaScriptFile(node)) {
-                var type = getTypeForThisExpressionFromJSDoc(container);
-                if (type && type !== unknownType) {
-                    return type;
-                }
+            // TypeScript 1.0 spec (April 2014): 4.15.4
+            // The instanceof operator requires the left operand to be of type Any, an object type, or a type parameter type,
+            // and the right operand to be of type Any, a subtype of the 'Function' interface type, or have a call or construct signature.
+            // The result is always of the Boolean primitive type.
+            // NOTE: do not raise error if leftType is unknown as related error was already reported
+            if (isTypeOfKind(leftType, 8190 /* Primitive */)) {
+                error(left, ts.Diagnostics.The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_parameter);
             }
-            if (compilerOptions.noImplicitThis) {
-                // With noImplicitThis, functions may not reference 'this' if it has type 'any'
-                error(node, ts.Diagnostics.this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation);
+            // NOTE: do not raise error if right is unknown as related error was already reported
+            if (!(isTypeAny(rightType) ||
+                getSignaturesOfType(rightType, 0 /* Call */).length ||
+                getSignaturesOfType(rightType, 1 /* Construct */).length ||
+                isTypeSubtypeOf(rightType, globalFunctionType))) {
+                error(right, ts.Diagnostics.The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_Function_interface_type);
             }
-            return anyType;
+            return booleanType;
         }
-        function getTypeForThisExpressionFromJSDoc(node) {
-            var typeTag = ts.getJSDocTypeTag(node);
-            if (typeTag && typeTag.typeExpression && typeTag.typeExpression.type && typeTag.typeExpression.type.kind === 269 /* JSDocFunctionType */) {
-                var jsDocFunctionType = typeTag.typeExpression.type;
-                if (jsDocFunctionType.parameters.length > 0 && jsDocFunctionType.parameters[0].type.kind === 272 /* JSDocThisType */) {
-                    return getTypeFromTypeNode(jsDocFunctionType.parameters[0].type);
-                }
+        function checkInExpression(left, right, leftType, rightType) {
+            if (leftType === silentNeverType || rightType === silentNeverType) {
+                return silentNeverType;
             }
-        }
-        function isInConstructorArgumentInitializer(node, constructorDecl) {
-            for (var n = node; n && n !== constructorDecl; n = n.parent) {
-                if (n.kind === 142 /* Parameter */) {
-                    return true;
-                }
+            leftType = checkNonNullType(leftType, left);
+            rightType = checkNonNullType(rightType, right);
+            // TypeScript 1.0 spec (April 2014): 4.15.5
+            // The in operator requires the left operand to be of type Any, the String primitive type, or the Number primitive type,
+            // and the right operand to be of type Any, an object type, or a type parameter type.
+            // The result is always of the Boolean primitive type.
+            if (!(isTypeComparableTo(leftType, stringType) || isTypeOfKind(leftType, 84 /* NumberLike */ | 512 /* ESSymbol */))) {
+                error(left, ts.Diagnostics.The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol);
             }
-            return false;
+            if (!isTypeAnyOrAllConstituentTypesHaveKind(rightType, 32768 /* Object */ | 540672 /* TypeVariable */ | 16777216 /* NonPrimitive */)) {
+                error(right, ts.Diagnostics.The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter);
+            }
+            return booleanType;
         }
-        function checkSuperExpression(node) {
-            var isCallExpression = node.parent.kind === 174 /* CallExpression */ && node.parent.expression === node;
-            var container = ts.getSuperContainer(node, /*stopOnFunctions*/ true);
-            var needToCaptureLexicalThis = false;
-            // adjust the container reference in case if super is used inside arrow functions with arbitrarily deep nesting
-            if (!isCallExpression) {
-                while (container && container.kind === 180 /* ArrowFunction */) {
-                    container = ts.getSuperContainer(container, /*stopOnFunctions*/ true);
-                    needToCaptureLexicalThis = languageVersion < 2 /* ES6 */;
-                }
+        function checkObjectLiteralAssignment(node, sourceType) {
+            var properties = node.properties;
+            for (var _i = 0, properties_6 = properties; _i < properties_6.length; _i++) {
+                var p = properties_6[_i];
+                checkObjectLiteralDestructuringPropertyAssignment(sourceType, p, properties);
             }
-            var canUseSuperExpression = isLegalUsageOfSuperExpression(container);
-            var nodeCheckFlag = 0;
-            if (!canUseSuperExpression) {
-                // issue more specific error if super is used in computed property name
-                // class A { foo() { return "1" }}
-                // class B {
-                //     [super.foo()]() {}
-                // }
-                var current = node;
-                while (current && current !== container && current.kind !== 140 /* ComputedPropertyName */) {
-                    current = current.parent;
-                }
-                if (current && current.kind === 140 /* ComputedPropertyName */) {
-                    error(node, ts.Diagnostics.super_cannot_be_referenced_in_a_computed_property_name);
+            return sourceType;
+        }
+        /** Note: If property cannot be a SpreadAssignment, then allProperties does not need to be provided */
+        function checkObjectLiteralDestructuringPropertyAssignment(objectLiteralType, property, allProperties) {
+            if (property.kind === 261 /* PropertyAssignment */ || property.kind === 262 /* ShorthandPropertyAssignment */) {
+                var name_23 = property.name;
+                if (name_23.kind === 144 /* ComputedPropertyName */) {
+                    checkComputedPropertyName(name_23);
                 }
-                else if (isCallExpression) {
-                    error(node, ts.Diagnostics.Super_calls_are_not_permitted_outside_constructors_or_in_nested_functions_inside_constructors);
+                if (isComputedNonLiteralName(name_23)) {
+                    return undefined;
                 }
-                else if (!container || !container.parent || !(ts.isClassLike(container.parent) || container.parent.kind === 171 /* ObjectLiteralExpression */)) {
-                    error(node, ts.Diagnostics.super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions);
+                var text = ts.getTextOfPropertyName(name_23);
+                var type = isTypeAny(objectLiteralType)
+                    ? objectLiteralType
+                    : getTypeOfPropertyOfType(objectLiteralType, text) ||
+                        isNumericLiteralName(text) && getIndexTypeOfType(objectLiteralType, 1 /* Number */) ||
+                        getIndexTypeOfType(objectLiteralType, 0 /* String */);
+                if (type) {
+                    if (property.kind === 262 /* ShorthandPropertyAssignment */) {
+                        return checkDestructuringAssignment(property, type);
+                    }
+                    else {
+                        // non-shorthand property assignments should always have initializers
+                        return checkDestructuringAssignment(property.initializer, type);
+                    }
                 }
                 else {
-                    error(node, ts.Diagnostics.super_property_access_is_permitted_only_in_a_constructor_member_function_or_member_accessor_of_a_derived_class);
+                    error(name_23, ts.Diagnostics.Type_0_has_no_property_1_and_no_string_index_signature, typeToString(objectLiteralType), ts.declarationNameToString(name_23));
                 }
-                return unknownType;
-            }
-            if ((ts.getModifierFlags(container) & 32 /* Static */) || isCallExpression) {
-                nodeCheckFlag = 512 /* SuperStatic */;
-            }
-            else {
-                nodeCheckFlag = 256 /* SuperInstance */;
             }
-            getNodeLinks(node).flags |= nodeCheckFlag;
-            // Due to how we emit async functions, we need to specialize the emit for an async method that contains a `super` reference.
-            // This is due to the fact that we emit the body of an async function inside of a generator function. As generator
-            // functions cannot reference `super`, we emit a helper inside of the method body, but outside of the generator. This helper
-            // uses an arrow function, which is permitted to reference `super`.
-            //
-            // There are two primary ways we can access `super` from within an async method. The first is getting the value of a property
-            // or indexed access on super, either as part of a right-hand-side expression or call expression. The second is when setting the value
-            // of a property or indexed access, either as part of an assignment expression or destructuring assignment.
-            //
-            // The simplest case is reading a value, in which case we will emit something like the following:
-            //
-            //  // ts
-            //  ...
-            //  async asyncMethod() {
-            //    let x = await super.asyncMethod();
-            //    return x;
-            //  }
-            //  ...
-            //
-            //  // js
-            //  ...
-            //  asyncMethod() {
-            //      const _super = name => super[name];
-            //      return __awaiter(this, arguments, Promise, function *() {
-            //          let x = yield _super("asyncMethod").call(this);
-            //          return x;
-            //      });
-            //  }
-            //  ...
-            //
-            // The more complex case is when we wish to assign a value, especially as part of a destructuring assignment. As both cases
-            // are legal in ES6, but also likely less frequent, we emit the same more complex helper for both scenarios:
-            //
-            //  // ts
-            //  ...
-            //  async asyncMethod(ar: Promise<any[]>) {
-            //      [super.a, super.b] = await ar;
-            //  }
-            //  ...
-            //
-            //  // js
-            //  ...
-            //  asyncMethod(ar) {
-            //      const _super = (function (geti, seti) {
-            //          const cache = Object.create(null);
-            //          return name => cache[name] || (cache[name] = { get value() { return geti(name); }, set value(v) { seti(name, v); } });
-            //      })(name => super[name], (name, value) => super[name] = value);
-            //      return __awaiter(this, arguments, Promise, function *() {
-            //          [_super("a").value, _super("b").value] = yield ar;
-            //      });
-            //  }
-            //  ...
-            //
-            // This helper creates an object with a "value" property that wraps the `super` property or indexed access for both get and set.
-            // This is required for destructuring assignments, as a call expression cannot be used as the target of a destructuring assignment
-            // while a property access can.
-            if (container.kind === 147 /* MethodDeclaration */ && ts.getModifierFlags(container) & 256 /* Async */) {
-                if (ts.isSuperProperty(node.parent) && ts.isAssignmentTarget(node.parent)) {
-                    getNodeLinks(container).flags |= 4096 /* AsyncMethodWithSuperBinding */;
+            else if (property.kind === 263 /* SpreadAssignment */) {
+                if (languageVersion < 5 /* ESNext */) {
+                    checkExternalEmitHelpers(property, 4 /* Rest */);
                 }
-                else {
-                    getNodeLinks(container).flags |= 2048 /* AsyncMethodWithSuper */;
+                var nonRestNames = [];
+                if (allProperties) {
+                    for (var i = 0; i < allProperties.length - 1; i++) {
+                        nonRestNames.push(allProperties[i].name);
+                    }
                 }
+                var type = getRestType(objectLiteralType, nonRestNames, objectLiteralType.symbol);
+                return checkDestructuringAssignment(property.expression, type);
             }
-            if (needToCaptureLexicalThis) {
-                // call expressions are allowed only in constructors so they should always capture correct 'this'
-                // super property access expressions can also appear in arrow functions -
-                // in this case they should also use correct lexical this
-                captureLexicalThis(node.parent, container);
-            }
-            if (container.parent.kind === 171 /* ObjectLiteralExpression */) {
-                if (languageVersion < 2 /* ES6 */) {
-                    error(node, ts.Diagnostics.super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_higher);
-                    return unknownType;
-                }
-                else {
-                    // for object literal assume that type of 'super' is 'any'
-                    return anyType;
-                }
+            else {
+                error(property, ts.Diagnostics.Property_assignment_expected);
             }
-            // at this point the only legal case for parent is ClassLikeDeclaration
-            var classLikeDeclaration = container.parent;
-            var classType = getDeclaredTypeOfSymbol(getSymbolOfNode(classLikeDeclaration));
-            var baseClassType = classType && getBaseTypes(classType)[0];
-            if (!baseClassType) {
-                if (!ts.getClassExtendsHeritageClauseElement(classLikeDeclaration)) {
-                    error(node, ts.Diagnostics.super_can_only_be_referenced_in_a_derived_class);
-                }
-                return unknownType;
+        }
+        function checkArrayLiteralAssignment(node, sourceType, checkMode) {
+            if (languageVersion < 2 /* ES2015 */ && compilerOptions.downlevelIteration) {
+                checkExternalEmitHelpers(node, 512 /* Read */);
             }
-            if (container.kind === 148 /* Constructor */ && isInConstructorArgumentInitializer(node, container)) {
-                // issue custom error message for super property access in constructor arguments (to be aligned with old compiler)
-                error(node, ts.Diagnostics.super_cannot_be_referenced_in_constructor_arguments);
-                return unknownType;
+            // This elementType will be used if the specific property corresponding to this index is not
+            // present (aka the tuple element property). This call also checks that the parentType is in
+            // fact an iterable or array (depending on target language).
+            var elementType = checkIteratedTypeOrElementType(sourceType, node, /*allowStringInput*/ false, /*allowAsyncIterables*/ false) || unknownType;
+            var elements = node.elements;
+            for (var i = 0; i < elements.length; i++) {
+                checkArrayLiteralDestructuringElementAssignment(node, sourceType, i, elementType, checkMode);
             }
-            return nodeCheckFlag === 512 /* SuperStatic */
-                ? getBaseConstructorTypeOfClass(classType)
-                : getTypeWithThisArgument(baseClassType, classType.thisType);
-            function isLegalUsageOfSuperExpression(container) {
-                if (!container) {
-                    return false;
-                }
-                if (isCallExpression) {
-                    // TS 1.0 SPEC (April 2014): 4.8.1
-                    // Super calls are only permitted in constructors of derived classes
-                    return container.kind === 148 /* Constructor */;
+            return sourceType;
+        }
+        function checkArrayLiteralDestructuringElementAssignment(node, sourceType, elementIndex, elementType, checkMode) {
+            var elements = node.elements;
+            var element = elements[elementIndex];
+            if (element.kind !== 200 /* OmittedExpression */) {
+                if (element.kind !== 198 /* SpreadElement */) {
+                    var propName = "" + elementIndex;
+                    var type = isTypeAny(sourceType)
+                        ? sourceType
+                        : isTupleLikeType(sourceType)
+                            ? getTypeOfPropertyOfType(sourceType, propName)
+                            : elementType;
+                    if (type) {
+                        return checkDestructuringAssignment(element, type, checkMode);
+                    }
+                    else {
+                        // We still need to check element expression here because we may need to set appropriate flag on the expression
+                        // such as NodeCheckFlags.LexicalThis on "this"expression.
+                        checkExpression(element);
+                        if (isTupleType(sourceType)) {
+                            error(element, ts.Diagnostics.Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2, typeToString(sourceType), getTypeReferenceArity(sourceType), elements.length);
+                        }
+                        else {
+                            error(element, ts.Diagnostics.Type_0_has_no_property_1, typeToString(sourceType), propName);
+                        }
+                    }
                 }
                 else {
-                    // TS 1.0 SPEC (April 2014)
-                    // 'super' property access is allowed
-                    // - In a constructor, instance member function, instance member accessor, or instance member variable initializer where this references a derived class instance
-                    // - In a static member function or static member accessor
-                    // topmost container must be something that is directly nested in the class declaration\object literal expression
-                    if (ts.isClassLike(container.parent) || container.parent.kind === 171 /* ObjectLiteralExpression */) {
-                        if (ts.getModifierFlags(container) & 32 /* Static */) {
-                            return container.kind === 147 /* MethodDeclaration */ ||
-                                container.kind === 146 /* MethodSignature */ ||
-                                container.kind === 149 /* GetAccessor */ ||
-                                container.kind === 150 /* SetAccessor */;
+                    if (elementIndex < elements.length - 1) {
+                        error(element, ts.Diagnostics.A_rest_element_must_be_last_in_a_destructuring_pattern);
+                    }
+                    else {
+                        var restExpression = element.expression;
+                        if (restExpression.kind === 194 /* BinaryExpression */ && restExpression.operatorToken.kind === 58 /* EqualsToken */) {
+                            error(restExpression.operatorToken, ts.Diagnostics.A_rest_element_cannot_have_an_initializer);
                         }
                         else {
-                            return container.kind === 147 /* MethodDeclaration */ ||
-                                container.kind === 146 /* MethodSignature */ ||
-                                container.kind === 149 /* GetAccessor */ ||
-                                container.kind === 150 /* SetAccessor */ ||
-                                container.kind === 145 /* PropertyDeclaration */ ||
-                                container.kind === 144 /* PropertySignature */ ||
-                                container.kind === 148 /* Constructor */;
+                            return checkDestructuringAssignment(restExpression, createArrayType(elementType), checkMode);
                         }
                     }
                 }
-                return false;
-            }
-        }
-        function getContextualThisParameter(func) {
-            if (isContextSensitiveFunctionOrObjectLiteralMethod(func) && func.kind !== 180 /* ArrowFunction */) {
-                var contextualSignature = getContextualSignature(func);
-                if (contextualSignature) {
-                    return contextualSignature.thisParameter;
-                }
             }
             return undefined;
         }
-        // Return contextual type of parameter or undefined if no contextual type is available
-        function getContextuallyTypedParameterType(parameter) {
-            var func = parameter.parent;
-            if (isContextSensitiveFunctionOrObjectLiteralMethod(func)) {
-                var iife = ts.getImmediatelyInvokedFunctionExpression(func);
-                if (iife) {
-                    var indexOfParameter = ts.indexOf(func.parameters, parameter);
-                    if (iife.arguments && indexOfParameter < iife.arguments.length) {
-                        if (parameter.dotDotDotToken) {
-                            var restTypes = [];
-                            for (var i = indexOfParameter; i < iife.arguments.length; i++) {
-                                restTypes.push(getWidenedLiteralType(checkExpression(iife.arguments[i])));
-                            }
-                            return createArrayType(getUnionType(restTypes));
-                        }
-                        var links = getNodeLinks(iife);
-                        var cached = links.resolvedSignature;
-                        links.resolvedSignature = anySignature;
-                        var type = getWidenedLiteralType(checkExpression(iife.arguments[indexOfParameter]));
-                        links.resolvedSignature = cached;
-                        return type;
+        function checkDestructuringAssignment(exprOrAssignment, sourceType, checkMode) {
+            var target;
+            if (exprOrAssignment.kind === 262 /* ShorthandPropertyAssignment */) {
+                var prop = exprOrAssignment;
+                if (prop.objectAssignmentInitializer) {
+                    // In strict null checking mode, if a default value of a non-undefined type is specified, remove
+                    // undefined from the final type.
+                    if (strictNullChecks &&
+                        !(getFalsyFlags(checkExpression(prop.objectAssignmentInitializer)) & 2048 /* Undefined */)) {
+                        sourceType = getTypeWithFacts(sourceType, 131072 /* NEUndefined */);
                     }
+                    checkBinaryLikeExpression(prop.name, prop.equalsToken, prop.objectAssignmentInitializer, checkMode);
                 }
-                var contextualSignature = getContextualSignature(func);
-                if (contextualSignature) {
-                    var funcHasRestParameters = ts.hasRestParameter(func);
-                    var len = func.parameters.length - (funcHasRestParameters ? 1 : 0);
-                    var indexOfParameter = ts.indexOf(func.parameters, parameter);
-                    if (indexOfParameter < len) {
-                        return getTypeAtPosition(contextualSignature, indexOfParameter);
+                target = exprOrAssignment.name;
+            }
+            else {
+                target = exprOrAssignment;
+            }
+            if (target.kind === 194 /* BinaryExpression */ && target.operatorToken.kind === 58 /* EqualsToken */) {
+                checkBinaryExpression(target, checkMode);
+                target = target.left;
+            }
+            if (target.kind === 178 /* ObjectLiteralExpression */) {
+                return checkObjectLiteralAssignment(target, sourceType);
+            }
+            if (target.kind === 177 /* ArrayLiteralExpression */) {
+                return checkArrayLiteralAssignment(target, sourceType, checkMode);
+            }
+            return checkReferenceAssignment(target, sourceType, checkMode);
+        }
+        function checkReferenceAssignment(target, sourceType, checkMode) {
+            var targetType = checkExpression(target, checkMode);
+            var error = target.parent.kind === 263 /* SpreadAssignment */ ?
+                ts.Diagnostics.The_target_of_an_object_rest_assignment_must_be_a_variable_or_a_property_access :
+                ts.Diagnostics.The_left_hand_side_of_an_assignment_expression_must_be_a_variable_or_a_property_access;
+            if (checkReferenceExpression(target, error)) {
+                checkTypeAssignableTo(sourceType, targetType, target, /*headMessage*/ undefined);
+            }
+            return sourceType;
+        }
+        /**
+         * This is a *shallow* check: An expression is side-effect-free if the
+         * evaluation of the expression *itself* cannot produce side effects.
+         * For example, x++ / 3 is side-effect free because the / operator
+         * does not have side effects.
+         * The intent is to "smell test" an expression for correctness in positions where
+         * its value is discarded (e.g. the left side of the comma operator).
+         */
+        function isSideEffectFree(node) {
+            node = ts.skipParentheses(node);
+            switch (node.kind) {
+                case 71 /* Identifier */:
+                case 9 /* StringLiteral */:
+                case 12 /* RegularExpressionLiteral */:
+                case 183 /* TaggedTemplateExpression */:
+                case 196 /* TemplateExpression */:
+                case 13 /* NoSubstitutionTemplateLiteral */:
+                case 8 /* NumericLiteral */:
+                case 101 /* TrueKeyword */:
+                case 86 /* FalseKeyword */:
+                case 95 /* NullKeyword */:
+                case 139 /* UndefinedKeyword */:
+                case 186 /* FunctionExpression */:
+                case 199 /* ClassExpression */:
+                case 187 /* ArrowFunction */:
+                case 177 /* ArrayLiteralExpression */:
+                case 178 /* ObjectLiteralExpression */:
+                case 189 /* TypeOfExpression */:
+                case 203 /* NonNullExpression */:
+                case 250 /* JsxSelfClosingElement */:
+                case 249 /* JsxElement */:
+                    return true;
+                case 195 /* ConditionalExpression */:
+                    return isSideEffectFree(node.whenTrue) &&
+                        isSideEffectFree(node.whenFalse);
+                case 194 /* BinaryExpression */:
+                    if (ts.isAssignmentOperator(node.operatorToken.kind)) {
+                        return false;
                     }
-                    // If last parameter is contextually rest parameter get its type
-                    if (funcHasRestParameters &&
-                        indexOfParameter === (func.parameters.length - 1) &&
-                        isRestParameterIndex(contextualSignature, func.parameters.length - 1)) {
-                        return getTypeOfSymbol(ts.lastOrUndefined(contextualSignature.parameters));
+                    return isSideEffectFree(node.left) &&
+                        isSideEffectFree(node.right);
+                case 192 /* PrefixUnaryExpression */:
+                case 193 /* PostfixUnaryExpression */:
+                    // Unary operators ~, !, +, and - have no side effects.
+                    // The rest do.
+                    switch (node.operator) {
+                        case 51 /* ExclamationToken */:
+                        case 37 /* PlusToken */:
+                        case 38 /* MinusToken */:
+                        case 52 /* TildeToken */:
+                            return true;
                     }
-                }
+                    return false;
+                // Some forms listed here for clarity
+                case 190 /* VoidExpression */: // Explicit opt-out
+                case 184 /* TypeAssertionExpression */: // Not SEF, but can produce useful type warnings
+                case 202 /* AsExpression */: // Not SEF, but can produce useful type warnings
+                default:
+                    return false;
             }
-            return undefined;
         }
-        // In a variable, parameter or property declaration with a type annotation,
-        //   the contextual type of an initializer expression is the type of the variable, parameter or property.
-        // Otherwise, in a parameter declaration of a contextually typed function expression,
-        //   the contextual type of an initializer expression is the contextual type of the parameter.
-        // Otherwise, in a variable or parameter declaration with a binding pattern name,
-        //   the contextual type of an initializer expression is the type implied by the binding pattern.
-        // Otherwise, in a binding pattern inside a variable or parameter declaration,
-        //   the contextual type of an initializer expression is the type annotation of the containing declaration, if present.
-        function getContextualTypeForInitializerExpression(node) {
-            var declaration = node.parent;
-            if (node === declaration.initializer) {
-                if (declaration.type) {
-                    return getTypeFromTypeNode(declaration.type);
-                }
-                if (declaration.kind === 142 /* Parameter */) {
-                    var type = getContextuallyTypedParameterType(declaration);
-                    if (type) {
-                        return type;
+        function isTypeEqualityComparableTo(source, target) {
+            return (target.flags & 6144 /* Nullable */) !== 0 || isTypeComparableTo(source, target);
+        }
+        function getBestChoiceType(type1, type2) {
+            var firstAssignableToSecond = isTypeAssignableTo(type1, type2);
+            var secondAssignableToFirst = isTypeAssignableTo(type2, type1);
+            return secondAssignableToFirst && !firstAssignableToSecond ? type1 :
+                firstAssignableToSecond && !secondAssignableToFirst ? type2 :
+                    getUnionType([type1, type2], /*subtypeReduction*/ true);
+        }
+        function checkBinaryExpression(node, checkMode) {
+            return checkBinaryLikeExpression(node.left, node.operatorToken, node.right, checkMode, node);
+        }
+        function checkBinaryLikeExpression(left, operatorToken, right, checkMode, errorNode) {
+            var operator = operatorToken.kind;
+            if (operator === 58 /* EqualsToken */ && (left.kind === 178 /* ObjectLiteralExpression */ || left.kind === 177 /* ArrayLiteralExpression */)) {
+                return checkDestructuringAssignment(left, checkExpression(right, checkMode), checkMode);
+            }
+            var leftType = checkExpression(left, checkMode);
+            var rightType = checkExpression(right, checkMode);
+            switch (operator) {
+                case 39 /* AsteriskToken */:
+                case 40 /* AsteriskAsteriskToken */:
+                case 61 /* AsteriskEqualsToken */:
+                case 62 /* AsteriskAsteriskEqualsToken */:
+                case 41 /* SlashToken */:
+                case 63 /* SlashEqualsToken */:
+                case 42 /* PercentToken */:
+                case 64 /* PercentEqualsToken */:
+                case 38 /* MinusToken */:
+                case 60 /* MinusEqualsToken */:
+                case 45 /* LessThanLessThanToken */:
+                case 65 /* LessThanLessThanEqualsToken */:
+                case 46 /* GreaterThanGreaterThanToken */:
+                case 66 /* GreaterThanGreaterThanEqualsToken */:
+                case 47 /* GreaterThanGreaterThanGreaterThanToken */:
+                case 67 /* GreaterThanGreaterThanGreaterThanEqualsToken */:
+                case 49 /* BarToken */:
+                case 69 /* BarEqualsToken */:
+                case 50 /* CaretToken */:
+                case 70 /* CaretEqualsToken */:
+                case 48 /* AmpersandToken */:
+                case 68 /* AmpersandEqualsToken */:
+                    if (leftType === silentNeverType || rightType === silentNeverType) {
+                        return silentNeverType;
+                    }
+                    leftType = checkNonNullType(leftType, left);
+                    rightType = checkNonNullType(rightType, right);
+                    var suggestedOperator = void 0;
+                    // if a user tries to apply a bitwise operator to 2 boolean operands
+                    // try and return them a helpful suggestion
+                    if ((leftType.flags & 136 /* BooleanLike */) &&
+                        (rightType.flags & 136 /* BooleanLike */) &&
+                        (suggestedOperator = getSuggestedBooleanOperator(operatorToken.kind)) !== undefined) {
+                        error(errorNode || operatorToken, ts.Diagnostics.The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead, ts.tokenToString(operatorToken.kind), ts.tokenToString(suggestedOperator));
+                    }
+                    else {
+                        // otherwise just check each operand separately and report errors as normal
+                        var leftOk = checkArithmeticOperandType(left, leftType, ts.Diagnostics.The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type);
+                        var rightOk = checkArithmeticOperandType(right, rightType, ts.Diagnostics.The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type);
+                        if (leftOk && rightOk) {
+                            checkAssignmentOperator(numberType);
+                        }
+                    }
+                    return numberType;
+                case 37 /* PlusToken */:
+                case 59 /* PlusEqualsToken */:
+                    if (leftType === silentNeverType || rightType === silentNeverType) {
+                        return silentNeverType;
+                    }
+                    if (!isTypeOfKind(leftType, 1 /* Any */ | 262178 /* StringLike */) && !isTypeOfKind(rightType, 1 /* Any */ | 262178 /* StringLike */)) {
+                        leftType = checkNonNullType(leftType, left);
+                        rightType = checkNonNullType(rightType, right);
+                    }
+                    var resultType = void 0;
+                    if (isTypeOfKind(leftType, 84 /* NumberLike */) && isTypeOfKind(rightType, 84 /* NumberLike */)) {
+                        // Operands of an enum type are treated as having the primitive type Number.
+                        // If both operands are of the Number primitive type, the result is of the Number primitive type.
+                        resultType = numberType;
+                    }
+                    else {
+                        if (isTypeOfKind(leftType, 262178 /* StringLike */) || isTypeOfKind(rightType, 262178 /* StringLike */)) {
+                            // If one or both operands are of the String primitive type, the result is of the String primitive type.
+                            resultType = stringType;
+                        }
+                        else if (isTypeAny(leftType) || isTypeAny(rightType)) {
+                            // Otherwise, the result is of type Any.
+                            // NOTE: unknown type here denotes error type. Old compiler treated this case as any type so do we.
+                            resultType = leftType === unknownType || rightType === unknownType ? unknownType : anyType;
+                        }
+                        // Symbols are not allowed at all in arithmetic expressions
+                        if (resultType && !checkForDisallowedESSymbolOperand(operator)) {
+                            return resultType;
+                        }
+                    }
+                    if (!resultType) {
+                        reportOperatorError();
+                        return anyType;
+                    }
+                    if (operator === 59 /* PlusEqualsToken */) {
+                        checkAssignmentOperator(resultType);
+                    }
+                    return resultType;
+                case 27 /* LessThanToken */:
+                case 29 /* GreaterThanToken */:
+                case 30 /* LessThanEqualsToken */:
+                case 31 /* GreaterThanEqualsToken */:
+                    if (checkForDisallowedESSymbolOperand(operator)) {
+                        leftType = getBaseTypeOfLiteralType(checkNonNullType(leftType, left));
+                        rightType = getBaseTypeOfLiteralType(checkNonNullType(rightType, right));
+                        if (!isTypeComparableTo(leftType, rightType) && !isTypeComparableTo(rightType, leftType)) {
+                            reportOperatorError();
+                        }
+                    }
+                    return booleanType;
+                case 32 /* EqualsEqualsToken */:
+                case 33 /* ExclamationEqualsToken */:
+                case 34 /* EqualsEqualsEqualsToken */:
+                case 35 /* ExclamationEqualsEqualsToken */:
+                    var leftIsLiteral = isLiteralType(leftType);
+                    var rightIsLiteral = isLiteralType(rightType);
+                    if (!leftIsLiteral || !rightIsLiteral) {
+                        leftType = leftIsLiteral ? getBaseTypeOfLiteralType(leftType) : leftType;
+                        rightType = rightIsLiteral ? getBaseTypeOfLiteralType(rightType) : rightType;
+                    }
+                    if (!isTypeEqualityComparableTo(leftType, rightType) && !isTypeEqualityComparableTo(rightType, leftType)) {
+                        reportOperatorError();
                     }
-                }
-                if (ts.isBindingPattern(declaration.name)) {
-                    return getTypeFromBindingPattern(declaration.name, /*includePatternInType*/ true, /*reportErrors*/ false);
-                }
-                if (ts.isBindingPattern(declaration.parent)) {
-                    var parentDeclaration = declaration.parent.parent;
-                    var name_15 = declaration.propertyName || declaration.name;
-                    if (ts.isVariableLike(parentDeclaration) &&
-                        parentDeclaration.type &&
-                        !ts.isBindingPattern(name_15)) {
-                        var text = getTextOfPropertyName(name_15);
-                        if (text) {
-                            return getTypeOfPropertyOfType(getTypeFromTypeNode(parentDeclaration.type), text);
-                        }
+                    return booleanType;
+                case 93 /* InstanceOfKeyword */:
+                    return checkInstanceOfExpression(left, right, leftType, rightType);
+                case 92 /* InKeyword */:
+                    return checkInExpression(left, right, leftType, rightType);
+                case 53 /* AmpersandAmpersandToken */:
+                    return getTypeFacts(leftType) & 1048576 /* Truthy */ ?
+                        getUnionType([extractDefinitelyFalsyTypes(strictNullChecks ? leftType : getBaseTypeOfLiteralType(rightType)), rightType]) :
+                        leftType;
+                case 54 /* BarBarToken */:
+                    return getTypeFacts(leftType) & 2097152 /* Falsy */ ?
+                        getBestChoiceType(removeDefinitelyFalsyTypes(leftType), rightType) :
+                        leftType;
+                case 58 /* EqualsToken */:
+                    checkAssignmentOperator(rightType);
+                    return getRegularTypeOfObjectLiteral(rightType);
+                case 26 /* CommaToken */:
+                    if (!compilerOptions.allowUnreachableCode && isSideEffectFree(left) && !isEvalNode(right)) {
+                        error(left, ts.Diagnostics.Left_side_of_comma_operator_is_unused_and_has_no_side_effects);
                     }
-                }
+                    return rightType;
             }
-            return undefined;
-        }
-        function getContextualTypeForReturnExpression(node) {
-            var func = ts.getContainingFunction(node);
-            if (ts.isAsyncFunctionLike(func)) {
-                var contextualReturnType = getContextualReturnType(func);
-                if (contextualReturnType) {
-                    return getPromisedType(contextualReturnType);
+            function isEvalNode(node) {
+                return node.kind === 71 /* Identifier */ && node.text === "eval";
+            }
+            // Return true if there was no error, false if there was an error.
+            function checkForDisallowedESSymbolOperand(operator) {
+                var offendingSymbolOperand = maybeTypeOfKind(leftType, 512 /* ESSymbol */) ? left :
+                    maybeTypeOfKind(rightType, 512 /* ESSymbol */) ? right :
+                        undefined;
+                if (offendingSymbolOperand) {
+                    error(offendingSymbolOperand, ts.Diagnostics.The_0_operator_cannot_be_applied_to_type_symbol, ts.tokenToString(operator));
+                    return false;
                 }
-                return undefined;
+                return true;
             }
-            if (func && !func.asteriskToken) {
-                return getContextualReturnType(func);
+            function getSuggestedBooleanOperator(operator) {
+                switch (operator) {
+                    case 49 /* BarToken */:
+                    case 69 /* BarEqualsToken */:
+                        return 54 /* BarBarToken */;
+                    case 50 /* CaretToken */:
+                    case 70 /* CaretEqualsToken */:
+                        return 35 /* ExclamationEqualsEqualsToken */;
+                    case 48 /* AmpersandToken */:
+                    case 68 /* AmpersandEqualsToken */:
+                        return 53 /* AmpersandAmpersandToken */;
+                    default:
+                        return undefined;
+                }
             }
-            return undefined;
-        }
-        function getContextualTypeForYieldOperand(node) {
-            var func = ts.getContainingFunction(node);
-            if (func) {
-                var contextualReturnType = getContextualReturnType(func);
-                if (contextualReturnType) {
-                    return node.asteriskToken
-                        ? contextualReturnType
-                        : getElementTypeOfIterableIterator(contextualReturnType);
+            function checkAssignmentOperator(valueType) {
+                if (produceDiagnostics && ts.isAssignmentOperator(operator)) {
+                    // TypeScript 1.0 spec (April 2014): 4.17
+                    // An assignment of the form
+                    //    VarExpr = ValueExpr
+                    // requires VarExpr to be classified as a reference
+                    // A compound assignment furthermore requires VarExpr to be classified as a reference (section 4.1)
+                    // and the type of the non - compound operation to be assignable to the type of VarExpr.
+                    if (checkReferenceExpression(left, ts.Diagnostics.The_left_hand_side_of_an_assignment_expression_must_be_a_variable_or_a_property_access)) {
+                        // to avoid cascading errors check assignability only if 'isReference' check succeeded and no errors were reported
+                        checkTypeAssignableTo(valueType, leftType, left, /*headMessage*/ undefined);
+                    }
                 }
             }
-            return undefined;
+            function reportOperatorError() {
+                error(errorNode || operatorToken, ts.Diagnostics.Operator_0_cannot_be_applied_to_types_1_and_2, ts.tokenToString(operatorToken.kind), typeToString(leftType), typeToString(rightType));
+            }
         }
-        function isInParameterInitializerBeforeContainingFunction(node) {
-            while (node.parent && !ts.isFunctionLike(node.parent)) {
-                if (node.parent.kind === 142 /* Parameter */ && node.parent.initializer === node) {
+        function isYieldExpressionInClass(node) {
+            var current = node;
+            var parent = node.parent;
+            while (parent) {
+                if (ts.isFunctionLike(parent) && current === parent.body) {
+                    return false;
+                }
+                else if (ts.isClassLike(current)) {
                     return true;
                 }
-                node = node.parent;
+                current = parent;
+                parent = parent.parent;
             }
             return false;
         }
-        function getContextualReturnType(functionDecl) {
-            // If the containing function has a return type annotation, is a constructor, or is a get accessor whose
-            // corresponding set accessor has a type annotation, return statements in the function are contextually typed
-            if (functionDecl.type ||
-                functionDecl.kind === 148 /* Constructor */ ||
-                functionDecl.kind === 149 /* GetAccessor */ && ts.getSetAccessorTypeAnnotationNode(ts.getDeclarationOfKind(functionDecl.symbol, 150 /* SetAccessor */))) {
-                return getReturnTypeOfSignature(getSignatureFromDeclaration(functionDecl));
-            }
-            // Otherwise, if the containing function is contextually typed by a function type with exactly one call signature
-            // and that call signature is non-generic, return statements are contextually typed by the return type of the signature
-            var signature = getContextualSignatureForFunctionLikeDeclaration(functionDecl);
-            if (signature) {
-                return getReturnTypeOfSignature(signature);
-            }
-            return undefined;
-        }
-        // In a typed function call, an argument or substitution expression is contextually typed by the type of the corresponding parameter.
-        function getContextualTypeForArgument(callTarget, arg) {
-            var args = getEffectiveCallArguments(callTarget);
-            var argIndex = ts.indexOf(args, arg);
-            if (argIndex >= 0) {
-                var signature = getResolvedOrAnySignature(callTarget);
-                return getTypeAtPosition(signature, argIndex);
-            }
-            return undefined;
-        }
-        function getContextualTypeForSubstitutionExpression(template, substitutionExpression) {
-            if (template.parent.kind === 176 /* TaggedTemplateExpression */) {
-                return getContextualTypeForArgument(template.parent, substitutionExpression);
-            }
-            return undefined;
-        }
-        function getContextualTypeForBinaryOperand(node) {
-            var binaryExpression = node.parent;
-            var operator = binaryExpression.operatorToken.kind;
-            if (operator >= 56 /* FirstAssignment */ && operator <= 68 /* LastAssignment */) {
-                // Don't do this for special property assignments to avoid circularity
-                if (ts.getSpecialPropertyAssignmentKind(binaryExpression) !== 0 /* None */) {
-                    return undefined;
+        function checkYieldExpression(node) {
+            // Grammar checking
+            if (produceDiagnostics) {
+                if (!(node.flags & 4096 /* YieldContext */) || isYieldExpressionInClass(node)) {
+                    grammarErrorOnFirstToken(node, ts.Diagnostics.A_yield_expression_is_only_allowed_in_a_generator_body);
                 }
-                // In an assignment expression, the right operand is contextually typed by the type of the left operand.
-                if (node === binaryExpression.right) {
-                    return checkExpression(binaryExpression.left);
+                if (isInParameterInitializerBeforeContainingFunction(node)) {
+                    error(node, ts.Diagnostics.yield_expressions_cannot_be_used_in_a_parameter_initializer);
                 }
             }
-            else if (operator === 52 /* BarBarToken */) {
-                // When an || expression has a contextual type, the operands are contextually typed by that type. When an ||
-                // expression has no contextual type, the right operand is contextually typed by the type of the left operand.
-                var type = getContextualType(binaryExpression);
-                if (!type && node === binaryExpression.right) {
-                    type = checkExpression(binaryExpression.left);
+            if (node.expression) {
+                var func = ts.getContainingFunction(node);
+                // If the user's code is syntactically correct, the func should always have a star. After all,
+                // we are in a yield context.
+                var functionFlags = func && ts.getFunctionFlags(func);
+                if (node.asteriskToken) {
+                    // Async generator functions prior to ESNext require the __await, __asyncDelegator,
+                    // and __asyncValues helpers
+                    if ((functionFlags & 3 /* AsyncGenerator */) === 3 /* AsyncGenerator */ &&
+                        languageVersion < 5 /* ESNext */) {
+                        checkExternalEmitHelpers(node, 26624 /* AsyncDelegatorIncludes */);
+                    }
+                    // Generator functions prior to ES2015 require the __values helper
+                    if ((functionFlags & 3 /* AsyncGenerator */) === 1 /* Generator */ &&
+                        languageVersion < 2 /* ES2015 */ && compilerOptions.downlevelIteration) {
+                        checkExternalEmitHelpers(node, 256 /* Values */);
+                    }
                 }
-                return type;
-            }
-            else if (operator === 51 /* AmpersandAmpersandToken */ || operator === 24 /* CommaToken */) {
-                if (node === binaryExpression.right) {
-                    return getContextualType(binaryExpression);
+                if (functionFlags & 1 /* Generator */) {
+                    var expressionType = checkExpressionCached(node.expression, /*contextualMapper*/ undefined);
+                    var expressionElementType = void 0;
+                    var nodeIsYieldStar = !!node.asteriskToken;
+                    if (nodeIsYieldStar) {
+                        expressionElementType = checkIteratedTypeOrElementType(expressionType, node.expression, /*allowStringInput*/ false, (functionFlags & 2 /* Async */) !== 0);
+                    }
+                    // There is no point in doing an assignability check if the function
+                    // has no explicit return type because the return type is directly computed
+                    // from the yield expressions.
+                    var returnType = ts.getEffectiveReturnTypeNode(func);
+                    if (returnType) {
+                        var signatureElementType = getIteratedTypeOfGenerator(getTypeFromTypeNode(returnType), (functionFlags & 2 /* Async */) !== 0) || anyType;
+                        if (nodeIsYieldStar) {
+                            checkTypeAssignableTo(functionFlags & 2 /* Async */
+                                ? getAwaitedType(expressionElementType, node.expression, ts.Diagnostics.Type_of_iterated_elements_of_a_yield_Asterisk_operand_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member)
+                                : expressionElementType, signatureElementType, node.expression, 
+                            /*headMessage*/ undefined);
+                        }
+                        else {
+                            checkTypeAssignableTo(functionFlags & 2 /* Async */
+                                ? getAwaitedType(expressionType, node.expression, ts.Diagnostics.Type_of_yield_operand_in_an_async_generator_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member)
+                                : expressionType, signatureElementType, node.expression, 
+                            /*headMessage*/ undefined);
+                        }
+                    }
                 }
             }
-            return undefined;
+            // Both yield and yield* expressions have type 'any'
+            return anyType;
         }
-        // Apply a mapping function to a contextual type and return the resulting type. If the contextual type
-        // is a union type, the mapping function is applied to each constituent type and a union of the resulting
-        // types is returned.
-        function applyToContextualType(type, mapper) {
-            if (!(type.flags & 524288 /* Union */)) {
-                return mapper(type);
+        function checkConditionalExpression(node, checkMode) {
+            checkExpression(node.condition);
+            var type1 = checkExpression(node.whenTrue, checkMode);
+            var type2 = checkExpression(node.whenFalse, checkMode);
+            return getBestChoiceType(type1, type2);
+        }
+        function checkLiteralExpression(node) {
+            if (node.kind === 8 /* NumericLiteral */) {
+                checkGrammarNumericLiteral(node);
             }
-            var types = type.types;
-            var mappedType;
-            var mappedTypes;
-            for (var _i = 0, types_12 = types; _i < types_12.length; _i++) {
-                var current = types_12[_i];
-                var t = mapper(current);
-                if (t) {
-                    if (!mappedType) {
-                        mappedType = t;
-                    }
-                    else if (!mappedTypes) {
-                        mappedTypes = [mappedType, t];
-                    }
-                    else {
-                        mappedTypes.push(t);
-                    }
-                }
+            switch (node.kind) {
+                case 9 /* StringLiteral */:
+                    return getFreshTypeOfLiteralType(getLiteralType(node.text));
+                case 8 /* NumericLiteral */:
+                    return getFreshTypeOfLiteralType(getLiteralType(+node.text));
+                case 101 /* TrueKeyword */:
+                    return trueType;
+                case 86 /* FalseKeyword */:
+                    return falseType;
             }
-            return mappedTypes ? getUnionType(mappedTypes) : mappedType;
         }
-        function getTypeOfPropertyOfContextualType(type, name) {
-            return applyToContextualType(type, function (t) {
-                var prop = t.flags & 4161536 /* StructuredType */ ? getPropertyOfType(t, name) : undefined;
-                return prop ? getTypeOfSymbol(prop) : undefined;
+        function checkTemplateExpression(node) {
+            // We just want to check each expressions, but we are unconcerned with
+            // the type of each expression, as any value may be coerced into a string.
+            // It is worth asking whether this is what we really want though.
+            // A place where we actually *are* concerned with the expressions' types are
+            // in tagged templates.
+            ts.forEach(node.templateSpans, function (templateSpan) {
+                checkExpression(templateSpan.expression);
             });
+            return stringType;
         }
-        function getIndexTypeOfContextualType(type, kind) {
-            return applyToContextualType(type, function (t) { return getIndexTypeOfStructuredType(t, kind); });
-        }
-        // Return true if the given contextual type is a tuple-like type
-        function contextualTypeIsTupleLikeType(type) {
-            return !!(type.flags & 524288 /* Union */ ? ts.forEach(type.types, isTupleLikeType) : isTupleLikeType(type));
+        function checkExpressionWithContextualType(node, contextualType, contextualMapper) {
+            var saveContextualType = node.contextualType;
+            var saveContextualMapper = node.contextualMapper;
+            node.contextualType = contextualType;
+            node.contextualMapper = contextualMapper;
+            var checkMode = contextualMapper === identityMapper ? 1 /* SkipContextSensitive */ :
+                contextualMapper ? 2 /* Inferential */ : 0 /* Normal */;
+            var result = checkExpression(node, checkMode);
+            node.contextualType = saveContextualType;
+            node.contextualMapper = saveContextualMapper;
+            return result;
         }
-        // In an object literal contextually typed by a type T, the contextual type of a property assignment is the type of
-        // the matching property in T, if one exists. Otherwise, it is the type of the numeric index signature in T, if one
-        // exists. Otherwise, it is the type of the string index signature in T, if one exists.
-        function getContextualTypeForObjectLiteralMethod(node) {
-            ts.Debug.assert(ts.isObjectLiteralMethod(node));
-            if (isInsideWithStatementBody(node)) {
-                // We cannot answer semantic questions within a with block, do not proceed any further
-                return undefined;
+        function checkExpressionCached(node, checkMode) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                // When computing a type that we're going to cache, we need to ignore any ongoing control flow
+                // analysis because variables may have transient types in indeterminable states. Moving flowLoopStart
+                // to the top of the stack ensures all transient types are computed from a known point.
+                var saveFlowLoopStart = flowLoopStart;
+                flowLoopStart = flowLoopCount;
+                links.resolvedType = checkExpression(node, checkMode);
+                flowLoopStart = saveFlowLoopStart;
             }
-            return getContextualTypeForObjectLiteralElement(node);
+            return links.resolvedType;
         }
-        function getContextualTypeForObjectLiteralElement(element) {
-            var objectLiteral = element.parent;
-            var type = getApparentTypeOfContextualType(objectLiteral);
-            if (type) {
-                if (!ts.hasDynamicName(element)) {
-                    // For a (non-symbol) computed property, there is no reason to look up the name
-                    // in the type. It will just be "__computed", which does not appear in any
-                    // SymbolTable.
-                    var symbolName = getSymbolOfNode(element).name;
-                    var propertyType = getTypeOfPropertyOfContextualType(type, symbolName);
-                    if (propertyType) {
-                        return propertyType;
+        function isTypeAssertion(node) {
+            node = ts.skipParentheses(node);
+            return node.kind === 184 /* TypeAssertionExpression */ || node.kind === 202 /* AsExpression */;
+        }
+        function checkDeclarationInitializer(declaration) {
+            var type = getTypeOfExpression(declaration.initializer, /*cache*/ true);
+            return ts.getCombinedNodeFlags(declaration) & 2 /* Const */ ||
+                ts.getCombinedModifierFlags(declaration) & 64 /* Readonly */ && !ts.isParameterPropertyDeclaration(declaration) ||
+                isTypeAssertion(declaration.initializer) ? type : getWidenedLiteralType(type);
+        }
+        function isLiteralContextualType(contextualType) {
+            if (contextualType) {
+                if (contextualType.flags & 540672 /* TypeVariable */) {
+                    var constraint = getBaseConstraintOfType(contextualType) || emptyObjectType;
+                    // If the type parameter is constrained to the base primitive type we're checking for,
+                    // consider this a literal context. For example, given a type parameter 'T extends string',
+                    // this causes us to infer string literal types for T.
+                    if (constraint.flags & (2 /* String */ | 4 /* Number */ | 8 /* Boolean */ | 16 /* Enum */)) {
+                        return true;
                     }
+                    contextualType = constraint;
                 }
-                return isNumericName(element.name) && getIndexTypeOfContextualType(type, 1 /* Number */) ||
-                    getIndexTypeOfContextualType(type, 0 /* String */);
+                return maybeTypeOfKind(contextualType, (224 /* Literal */ | 262144 /* Index */));
             }
-            return undefined;
+            return false;
         }
-        // In an array literal contextually typed by a type T, the contextual type of an element expression at index N is
-        // the type of the property with the numeric name N in T, if one exists. Otherwise, if T has a numeric index signature,
-        // it is the type of the numeric index signature in T. Otherwise, in ES6 and higher, the contextual type is the iterated
-        // type of T.
-        function getContextualTypeForElementExpression(node) {
-            var arrayLiteral = node.parent;
-            var type = getApparentTypeOfContextualType(arrayLiteral);
-            if (type) {
-                var index = ts.indexOf(arrayLiteral.elements, node);
-                return getTypeOfPropertyOfContextualType(type, "" + index)
-                    || getIndexTypeOfContextualType(type, 1 /* Number */)
-                    || (languageVersion >= 2 /* ES6 */ ? getElementTypeOfIterable(type, /*errorNode*/ undefined) : undefined);
+        function checkExpressionForMutableLocation(node, checkMode) {
+            var type = checkExpression(node, checkMode);
+            return isTypeAssertion(node) || isLiteralContextualType(getContextualType(node)) ? type : getWidenedLiteralType(type);
+        }
+        function checkPropertyAssignment(node, checkMode) {
+            // Do not use hasDynamicName here, because that returns false for well known symbols.
+            // We want to perform checkComputedPropertyName for all computed properties, including
+            // well known symbols.
+            if (node.name.kind === 144 /* ComputedPropertyName */) {
+                checkComputedPropertyName(node.name);
             }
-            return undefined;
+            return checkExpressionForMutableLocation(node.initializer, checkMode);
         }
-        // In a contextually typed conditional expression, the true/false expressions are contextually typed by the same type.
-        function getContextualTypeForConditionalOperand(node) {
-            var conditional = node.parent;
-            return node === conditional.whenTrue || node === conditional.whenFalse ? getContextualType(conditional) : undefined;
+        function checkObjectLiteralMethod(node, checkMode) {
+            // Grammar checking
+            checkGrammarMethod(node);
+            // Do not use hasDynamicName here, because that returns false for well known symbols.
+            // We want to perform checkComputedPropertyName for all computed properties, including
+            // well known symbols.
+            if (node.name.kind === 144 /* ComputedPropertyName */) {
+                checkComputedPropertyName(node.name);
+            }
+            var uninstantiatedType = checkFunctionExpressionOrObjectLiteralMethod(node, checkMode);
+            return instantiateTypeWithSingleGenericCallSignature(node, uninstantiatedType, checkMode);
         }
-        function getContextualTypeForJsxAttribute(attribute) {
-            var kind = attribute.kind;
-            var jsxElement = attribute.parent;
-            var attrsType = getJsxElementAttributesType(jsxElement);
-            if (attribute.kind === 246 /* JsxAttribute */) {
-                if (!attrsType || isTypeAny(attrsType)) {
-                    return undefined;
+        function instantiateTypeWithSingleGenericCallSignature(node, type, checkMode) {
+            if (checkMode === 2 /* Inferential */) {
+                var signature = getSingleCallSignature(type);
+                if (signature && signature.typeParameters) {
+                    var contextualType = getApparentTypeOfContextualType(node);
+                    if (contextualType) {
+                        var contextualSignature = getSingleCallSignature(getNonNullableType(contextualType));
+                        if (contextualSignature && !contextualSignature.typeParameters) {
+                            return getOrCreateTypeFromSignature(instantiateSignatureInContextOf(signature, contextualSignature, getContextualMapper(node)));
+                        }
+                    }
                 }
-                return getTypeOfPropertyOfType(attrsType, attribute.name.text);
-            }
-            else if (attribute.kind === 247 /* JsxSpreadAttribute */) {
-                return attrsType;
             }
-            ts.Debug.fail("Expected JsxAttribute or JsxSpreadAttribute, got ts.SyntaxKind[" + kind + "]");
-        }
-        // Return the contextual type for a given expression node. During overload resolution, a contextual type may temporarily
-        // be "pushed" onto a node using the contextualType property.
-        function getApparentTypeOfContextualType(node) {
-            var type = getContextualType(node);
-            return type && getApparentType(type);
+            return type;
         }
         /**
-         * Woah! Do you really want to use this function?
-         *
-         * Unless you're trying to get the *non-apparent* type for a
-         * value-literal type or you're authoring relevant portions of this algorithm,
-         * you probably meant to use 'getApparentTypeOfContextualType'.
-         * Otherwise this may not be very useful.
-         *
-         * In cases where you *are* working on this function, you should understand
-         * when it is appropriate to use 'getContextualType' and 'getApparentTypeOfContextualType'.
-         *
-         *   - Use 'getContextualType' when you are simply going to propagate the result to the expression.
-         *   - Use 'getApparentTypeOfContextualType' when you're going to need the members of the type.
-         *
-         * @param node the expression whose contextual type will be returned.
-         * @returns the contextual type of an expression.
+         * Returns the type of an expression. Unlike checkExpression, this function is simply concerned
+         * with computing the type and may not fully check all contained sub-expressions for errors.
+         * A cache argument of true indicates that if the function performs a full type check, it is ok
+         * to cache the result.
          */
-        function getContextualType(node) {
-            if (isInsideWithStatementBody(node)) {
-                // We cannot answer semantic questions within a with block, do not proceed any further
-                return undefined;
+        function getTypeOfExpression(node, cache) {
+            // Optimize for the common case of a call to a function with a single non-generic call
+            // signature where we can just fetch the return type without checking the arguments.
+            if (node.kind === 181 /* CallExpression */ && node.expression.kind !== 97 /* SuperKeyword */ && !ts.isRequireCall(node, /*checkArgumentIsStringLiteral*/ true)) {
+                var funcType = checkNonNullExpression(node.expression);
+                var signature = getSingleCallSignature(funcType);
+                if (signature && !signature.typeParameters) {
+                    return getReturnTypeOfSignature(signature);
+                }
             }
-            if (node.contextualType) {
-                return node.contextualType;
+            // Otherwise simply call checkExpression. Ideally, the entire family of checkXXX functions
+            // should have a parameter that indicates whether full error checking is required such that
+            // we can perform the optimizations locally.
+            return cache ? checkExpressionCached(node) : checkExpression(node);
+        }
+        /**
+         * Returns the type of an expression. Unlike checkExpression, this function is simply concerned
+         * with computing the type and may not fully check all contained sub-expressions for errors.
+         * It is intended for uses where you know there is no contextual type,
+         * and requesting the contextual type might cause a circularity or other bad behaviour.
+         * It sets the contextual type of the node to any before calling getTypeOfExpression.
+         */
+        function getContextFreeTypeOfExpression(node) {
+            var saveContextualType = node.contextualType;
+            node.contextualType = anyType;
+            var type = getTypeOfExpression(node);
+            node.contextualType = saveContextualType;
+            return type;
+        }
+        // Checks an expression and returns its type. The contextualMapper parameter serves two purposes: When
+        // contextualMapper is not undefined and not equal to the identityMapper function object it indicates that the
+        // expression is being inferentially typed (section 4.15.2 in spec) and provides the type mapper to use in
+        // conjunction with the generic contextual type. When contextualMapper is equal to the identityMapper function
+        // object, it serves as an indicator that all contained function and arrow expressions should be considered to
+        // have the wildcard function type; this form of type check is used during overload resolution to exclude
+        // contextually typed function and arrow expressions in the initial phase.
+        function checkExpression(node, checkMode) {
+            var type;
+            if (node.kind === 143 /* QualifiedName */) {
+                type = checkQualifiedName(node);
             }
-            var parent = node.parent;
-            switch (parent.kind) {
-                case 218 /* VariableDeclaration */:
-                case 142 /* Parameter */:
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
-                case 169 /* BindingElement */:
-                    return getContextualTypeForInitializerExpression(node);
-                case 180 /* ArrowFunction */:
-                case 211 /* ReturnStatement */:
-                    return getContextualTypeForReturnExpression(node);
-                case 190 /* YieldExpression */:
-                    return getContextualTypeForYieldOperand(parent);
-                case 174 /* CallExpression */:
-                case 175 /* NewExpression */:
-                    return getContextualTypeForArgument(parent, node);
-                case 177 /* TypeAssertionExpression */:
-                case 195 /* AsExpression */:
-                    return getTypeFromTypeNode(parent.type);
-                case 187 /* BinaryExpression */:
-                    return getContextualTypeForBinaryOperand(node);
-                case 253 /* PropertyAssignment */:
-                case 254 /* ShorthandPropertyAssignment */:
-                    return getContextualTypeForObjectLiteralElement(parent);
-                case 170 /* ArrayLiteralExpression */:
-                    return getContextualTypeForElementExpression(node);
-                case 188 /* ConditionalExpression */:
-                    return getContextualTypeForConditionalOperand(node);
-                case 197 /* TemplateSpan */:
-                    ts.Debug.assert(parent.parent.kind === 189 /* TemplateExpression */);
-                    return getContextualTypeForSubstitutionExpression(parent.parent, node);
-                case 178 /* ParenthesizedExpression */:
-                    return getContextualType(parent);
-                case 248 /* JsxExpression */:
-                    return getContextualType(parent);
-                case 246 /* JsxAttribute */:
-                case 247 /* JsxSpreadAttribute */:
-                    return getContextualTypeForJsxAttribute(parent);
+            else {
+                var uninstantiatedType = checkExpressionWorker(node, checkMode);
+                type = instantiateTypeWithSingleGenericCallSignature(node, uninstantiatedType, checkMode);
             }
-            return undefined;
-        }
-        // If the given type is an object or union type, if that type has a single signature, and if
-        // that signature is non-generic, return the signature. Otherwise return undefined.
-        function getNonGenericSignature(type) {
-            var signatures = getSignaturesOfStructuredType(type, 0 /* Call */);
-            if (signatures.length === 1) {
-                var signature = signatures[0];
-                if (!signature.typeParameters) {
-                    return signature;
+            if (isConstEnumObjectType(type)) {
+                // enum object type for const enums are only permitted in:
+                // - 'left' in property access
+                // - 'object' in indexed access
+                // - target in rhs of import statement
+                var ok = (node.parent.kind === 179 /* PropertyAccessExpression */ && node.parent.expression === node) ||
+                    (node.parent.kind === 180 /* ElementAccessExpression */ && node.parent.expression === node) ||
+                    ((node.kind === 71 /* Identifier */ || node.kind === 143 /* QualifiedName */) && isInRightSideOfImportOrExportAssignment(node));
+                if (!ok) {
+                    error(node, ts.Diagnostics.const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_import_declaration_or_export_assignment);
                 }
             }
+            return type;
         }
-        function isFunctionExpressionOrArrowFunction(node) {
-            return node.kind === 179 /* FunctionExpression */ || node.kind === 180 /* ArrowFunction */;
-        }
-        function getContextualSignatureForFunctionLikeDeclaration(node) {
-            // Only function expressions, arrow functions, and object literal methods are contextually typed.
-            return isFunctionExpressionOrArrowFunction(node) || ts.isObjectLiteralMethod(node)
-                ? getContextualSignature(node)
-                : undefined;
+        function checkExpressionWorker(node, checkMode) {
+            switch (node.kind) {
+                case 71 /* Identifier */:
+                    return checkIdentifier(node);
+                case 99 /* ThisKeyword */:
+                    return checkThisExpression(node);
+                case 97 /* SuperKeyword */:
+                    return checkSuperExpression(node);
+                case 95 /* NullKeyword */:
+                    return nullWideningType;
+                case 9 /* StringLiteral */:
+                case 8 /* NumericLiteral */:
+                case 101 /* TrueKeyword */:
+                case 86 /* FalseKeyword */:
+                    return checkLiteralExpression(node);
+                case 196 /* TemplateExpression */:
+                    return checkTemplateExpression(node);
+                case 13 /* NoSubstitutionTemplateLiteral */:
+                    return stringType;
+                case 12 /* RegularExpressionLiteral */:
+                    return globalRegExpType;
+                case 177 /* ArrayLiteralExpression */:
+                    return checkArrayLiteral(node, checkMode);
+                case 178 /* ObjectLiteralExpression */:
+                    return checkObjectLiteral(node, checkMode);
+                case 179 /* PropertyAccessExpression */:
+                    return checkPropertyAccessExpression(node);
+                case 180 /* ElementAccessExpression */:
+                    return checkIndexedAccess(node);
+                case 181 /* CallExpression */:
+                    if (node.expression.kind === 91 /* ImportKeyword */) {
+                        return checkImportCallExpression(node);
+                    }
+                /* falls through */
+                case 182 /* NewExpression */:
+                    return checkCallExpression(node);
+                case 183 /* TaggedTemplateExpression */:
+                    return checkTaggedTemplateExpression(node);
+                case 185 /* ParenthesizedExpression */:
+                    return checkExpression(node.expression, checkMode);
+                case 199 /* ClassExpression */:
+                    return checkClassExpression(node);
+                case 186 /* FunctionExpression */:
+                case 187 /* ArrowFunction */:
+                    return checkFunctionExpressionOrObjectLiteralMethod(node, checkMode);
+                case 189 /* TypeOfExpression */:
+                    return checkTypeOfExpression(node);
+                case 184 /* TypeAssertionExpression */:
+                case 202 /* AsExpression */:
+                    return checkAssertion(node);
+                case 203 /* NonNullExpression */:
+                    return checkNonNullAssertion(node);
+                case 204 /* MetaProperty */:
+                    return checkMetaProperty(node);
+                case 188 /* DeleteExpression */:
+                    return checkDeleteExpression(node);
+                case 190 /* VoidExpression */:
+                    return checkVoidExpression(node);
+                case 191 /* AwaitExpression */:
+                    return checkAwaitExpression(node);
+                case 192 /* PrefixUnaryExpression */:
+                    return checkPrefixUnaryExpression(node);
+                case 193 /* PostfixUnaryExpression */:
+                    return checkPostfixUnaryExpression(node);
+                case 194 /* BinaryExpression */:
+                    return checkBinaryExpression(node, checkMode);
+                case 195 /* ConditionalExpression */:
+                    return checkConditionalExpression(node, checkMode);
+                case 198 /* SpreadElement */:
+                    return checkSpreadExpression(node, checkMode);
+                case 200 /* OmittedExpression */:
+                    return undefinedWideningType;
+                case 197 /* YieldExpression */:
+                    return checkYieldExpression(node);
+                case 256 /* JsxExpression */:
+                    return checkJsxExpression(node, checkMode);
+                case 249 /* JsxElement */:
+                    return checkJsxElement(node);
+                case 250 /* JsxSelfClosingElement */:
+                    return checkJsxSelfClosingElement(node);
+                case 254 /* JsxAttributes */:
+                    return checkJsxAttributes(node, checkMode);
+                case 251 /* JsxOpeningElement */:
+                    ts.Debug.fail("Shouldn't ever directly check a JsxOpeningElement");
+            }
+            return unknownType;
         }
-        function getContextualTypeForFunctionLikeDeclaration(node) {
-            return ts.isObjectLiteralMethod(node) ?
-                getContextualTypeForObjectLiteralMethod(node) :
-                getApparentTypeOfContextualType(node);
+        // DECLARATION AND STATEMENT TYPE CHECKING
+        function checkTypeParameter(node) {
+            // Grammar Checking
+            if (node.expression) {
+                grammarErrorOnFirstToken(node.expression, ts.Diagnostics.Type_expected);
+            }
+            checkSourceElement(node.constraint);
+            checkSourceElement(node.default);
+            var typeParameter = getDeclaredTypeOfTypeParameter(getSymbolOfNode(node));
+            if (!hasNonCircularBaseConstraint(typeParameter)) {
+                error(node.constraint, ts.Diagnostics.Type_parameter_0_has_a_circular_constraint, typeToString(typeParameter));
+            }
+            var constraintType = getConstraintOfTypeParameter(typeParameter);
+            var defaultType = getDefaultFromTypeParameter(typeParameter);
+            if (constraintType && defaultType) {
+                checkTypeAssignableTo(defaultType, getTypeWithThisArgument(constraintType, defaultType), node.default, ts.Diagnostics.Type_0_does_not_satisfy_the_constraint_1);
+            }
+            if (produceDiagnostics) {
+                checkTypeNameIsReserved(node.name, ts.Diagnostics.Type_parameter_name_cannot_be_0);
+            }
         }
-        // Return the contextual signature for a given expression node. A contextual type provides a
-        // contextual signature if it has a single call signature and if that call signature is non-generic.
-        // If the contextual type is a union type, get the signature from each type possible and if they are
-        // all identical ignoring their return type, the result is same signature but with return type as
-        // union type of return types from these signatures
-        function getContextualSignature(node) {
-            ts.Debug.assert(node.kind !== 147 /* MethodDeclaration */ || ts.isObjectLiteralMethod(node));
-            var type = getContextualTypeForFunctionLikeDeclaration(node);
-            if (!type) {
-                return undefined;
+        function checkParameter(node) {
+            // Grammar checking
+            // It is a SyntaxError if the Identifier "eval" or the Identifier "arguments" occurs as the
+            // Identifier in a PropertySetParameterList of a PropertyAssignment that is contained in strict code
+            // or if its FunctionBody is strict code(11.1.5).
+            // Grammar checking
+            checkGrammarDecorators(node) || checkGrammarModifiers(node);
+            checkVariableLikeDeclaration(node);
+            var func = ts.getContainingFunction(node);
+            if (ts.getModifierFlags(node) & 92 /* ParameterPropertyModifier */) {
+                func = ts.getContainingFunction(node);
+                if (!(func.kind === 152 /* Constructor */ && ts.nodeIsPresent(func.body))) {
+                    error(node, ts.Diagnostics.A_parameter_property_is_only_allowed_in_a_constructor_implementation);
+                }
             }
-            if (!(type.flags & 524288 /* Union */)) {
-                return getNonGenericSignature(type);
+            if (node.questionToken && ts.isBindingPattern(node.name) && func.body) {
+                error(node, ts.Diagnostics.A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature);
             }
-            var signatureList;
-            var types = type.types;
-            for (var _i = 0, types_13 = types; _i < types_13.length; _i++) {
-                var current = types_13[_i];
-                var signature = getNonGenericSignature(current);
-                if (signature) {
-                    if (!signatureList) {
-                        // This signature will contribute to contextual union signature
-                        signatureList = [signature];
-                    }
-                    else if (!compareSignaturesIdentical(signatureList[0], signature, /*partialMatch*/ false, /*ignoreThisTypes*/ true, /*ignoreReturnTypes*/ true, compareTypesIdentical)) {
-                        // Signatures aren't identical, do not use
-                        return undefined;
-                    }
-                    else {
-                        // Use this signature for contextual union signature
-                        signatureList.push(signature);
-                    }
+            if (node.name.text === "this") {
+                if (ts.indexOf(func.parameters, node) !== 0) {
+                    error(node, ts.Diagnostics.A_this_parameter_must_be_the_first_parameter);
+                }
+                if (func.kind === 152 /* Constructor */ || func.kind === 156 /* ConstructSignature */ || func.kind === 161 /* ConstructorType */) {
+                    error(node, ts.Diagnostics.A_constructor_cannot_have_a_this_parameter);
                 }
             }
-            // Result is union of signatures collected (return type is union of return types of this signature set)
-            var result;
-            if (signatureList) {
-                result = cloneSignature(signatureList[0]);
-                // Clear resolved return type we possibly got from cloneSignature
-                result.resolvedReturnType = undefined;
-                result.unionSignatures = signatureList;
+            // Only check rest parameter type if it's not a binding pattern. Since binding patterns are
+            // not allowed in a rest parameter, we already have an error from checkGrammarParameterList.
+            if (node.dotDotDotToken && !ts.isBindingPattern(node.name) && !isArrayType(getTypeOfSymbol(node.symbol))) {
+                error(node, ts.Diagnostics.A_rest_parameter_must_be_of_an_array_type);
             }
-            return result;
-        }
-        /**
-         * Detect if the mapper implies an inference context. Specifically, there are 4 possible values
-         * for a mapper. Let's go through each one of them:
-         *
-         *    1. undefined - this means we are not doing inferential typing, but we may do contextual typing,
-         *       which could cause us to assign a parameter a type
-         *    2. identityMapper - means we want to avoid assigning a parameter a type, whether or not we are in
-         *       inferential typing (context is undefined for the identityMapper)
-         *    3. a mapper created by createInferenceMapper - we are doing inferential typing, we want to assign
-         *       types to parameters and fix type parameters (context is defined)
-         *    4. an instantiation mapper created by createTypeMapper or createTypeEraser - this should never be
-         *       passed as the contextual mapper when checking an expression (context is undefined for these)
-         *
-         * isInferentialContext is detecting if we are in case 3
-         */
-        function isInferentialContext(mapper) {
-            return mapper && mapper.context;
-        }
-        function checkSpreadElementExpression(node, contextualMapper) {
-            // It is usually not safe to call checkExpressionCached if we can be contextually typing.
-            // You can tell that we are contextually typing because of the contextualMapper parameter.
-            // While it is true that a spread element can have a contextual type, it does not do anything
-            // with this type. It is neither affected by it, nor does it propagate it to its operand.
-            // So the fact that contextualMapper is passed is not important, because the operand of a spread
-            // element is not contextually typed.
-            var arrayOrIterableType = checkExpressionCached(node.expression, contextualMapper);
-            return checkIteratedTypeOrElementType(arrayOrIterableType, node.expression, /*allowStringInput*/ false);
         }
-        function hasDefaultValue(node) {
-            return (node.kind === 169 /* BindingElement */ && !!node.initializer) ||
-                (node.kind === 187 /* BinaryExpression */ && node.operatorToken.kind === 56 /* EqualsToken */);
-        }
-        function checkArrayLiteral(node, contextualMapper) {
-            var elements = node.elements;
-            var hasSpreadElement = false;
-            var elementTypes = [];
-            var inDestructuringPattern = ts.isAssignmentTarget(node);
-            for (var _i = 0, elements_1 = elements; _i < elements_1.length; _i++) {
-                var e = elements_1[_i];
-                if (inDestructuringPattern && e.kind === 191 /* SpreadElementExpression */) {
-                    // Given the following situation:
-                    //    var c: {};
-                    //    [...c] = ["", 0];
-                    //
-                    // c is represented in the tree as a spread element in an array literal.
-                    // But c really functions as a rest element, and its purpose is to provide
-                    // a contextual type for the right hand side of the assignment. Therefore,
-                    // instead of calling checkExpression on "...c", which will give an error
-                    // if c is not iterable/array-like, we need to act as if we are trying to
-                    // get the contextual element type from it. So we do something similar to
-                    // getContextualTypeForElementExpression, which will crucially not error
-                    // if there is no index type / iterated type.
-                    var restArrayType = checkExpression(e.expression, contextualMapper);
-                    var restElementType = getIndexTypeOfType(restArrayType, 1 /* Number */) ||
-                        (languageVersion >= 2 /* ES6 */ ? getElementTypeOfIterable(restArrayType, /*errorNode*/ undefined) : undefined);
-                    if (restElementType) {
-                        elementTypes.push(restElementType);
-                    }
-                }
-                else {
-                    var type = checkExpressionForMutableLocation(e, contextualMapper);
-                    elementTypes.push(type);
+        function getTypePredicateParameterIndex(parameterList, parameter) {
+            if (parameterList) {
+                for (var i = 0; i < parameterList.length; i++) {
+                    var param = parameterList[i];
+                    if (param.name.kind === 71 /* Identifier */ &&
+                        param.name.text === parameter.text) {
+                        return i;
+                    }
                 }
-                hasSpreadElement = hasSpreadElement || e.kind === 191 /* SpreadElementExpression */;
             }
-            if (!hasSpreadElement) {
-                // If array literal is actually a destructuring pattern, mark it as an implied type. We do this such
-                // that we get the same behavior for "var [x, y] = []" and "[x, y] = []".
-                if (inDestructuringPattern && elementTypes.length) {
-                    var type = cloneTypeReference(createTupleType(elementTypes));
-                    type.pattern = node;
-                    return type;
+            return -1;
+        }
+        function checkTypePredicate(node) {
+            var parent = getTypePredicateParent(node);
+            if (!parent) {
+                // The parent must not be valid.
+                error(node, ts.Diagnostics.A_type_predicate_is_only_allowed_in_return_type_position_for_functions_and_methods);
+                return;
+            }
+            var typePredicate = getSignatureFromDeclaration(parent).typePredicate;
+            if (!typePredicate) {
+                return;
+            }
+            var parameterName = node.parameterName;
+            if (ts.isThisTypePredicate(typePredicate)) {
+                getTypeFromThisTypeNode(parameterName);
+            }
+            else {
+                if (typePredicate.parameterIndex >= 0) {
+                    if (parent.parameters[typePredicate.parameterIndex].dotDotDotToken) {
+                        error(parameterName, ts.Diagnostics.A_type_predicate_cannot_reference_a_rest_parameter);
+                    }
+                    else {
+                        var leadingError = ts.chainDiagnosticMessages(/*details*/ undefined, ts.Diagnostics.A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type);
+                        checkTypeAssignableTo(typePredicate.type, getTypeOfNode(parent.parameters[typePredicate.parameterIndex]), node.type, 
+                        /*headMessage*/ undefined, leadingError);
+                    }
                 }
-                var contextualType = getApparentTypeOfContextualType(node);
-                if (contextualType && contextualTypeIsTupleLikeType(contextualType)) {
-                    var pattern = contextualType.pattern;
-                    // If array literal is contextually typed by a binding pattern or an assignment pattern, pad the resulting
-                    // tuple type with the corresponding binding or assignment element types to make the lengths equal.
-                    if (pattern && (pattern.kind === 168 /* ArrayBindingPattern */ || pattern.kind === 170 /* ArrayLiteralExpression */)) {
-                        var patternElements = pattern.elements;
-                        for (var i = elementTypes.length; i < patternElements.length; i++) {
-                            var patternElement = patternElements[i];
-                            if (hasDefaultValue(patternElement)) {
-                                elementTypes.push(contextualType.typeArguments[i]);
-                            }
-                            else {
-                                if (patternElement.kind !== 193 /* OmittedExpression */) {
-                                    error(patternElement, ts.Diagnostics.Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value);
-                                }
-                                elementTypes.push(unknownType);
-                            }
+                else if (parameterName) {
+                    var hasReportedError = false;
+                    for (var _i = 0, _a = parent.parameters; _i < _a.length; _i++) {
+                        var name_24 = _a[_i].name;
+                        if (ts.isBindingPattern(name_24) &&
+                            checkIfTypePredicateVariableIsDeclaredInBindingPattern(name_24, parameterName, typePredicate.parameterName)) {
+                            hasReportedError = true;
+                            break;
                         }
                     }
-                    if (elementTypes.length) {
-                        return createTupleType(elementTypes);
+                    if (!hasReportedError) {
+                        error(node.parameterName, ts.Diagnostics.Cannot_find_parameter_0, typePredicate.parameterName);
                     }
                 }
             }
-            return createArrayType(elementTypes.length ?
-                getUnionType(elementTypes, /*subtypeReduction*/ true) :
-                strictNullChecks ? neverType : undefinedWideningType);
-        }
-        function isNumericName(name) {
-            return name.kind === 140 /* ComputedPropertyName */ ? isNumericComputedName(name) : isNumericLiteralName(name.text);
-        }
-        function isNumericComputedName(name) {
-            // It seems odd to consider an expression of type Any to result in a numeric name,
-            // but this behavior is consistent with checkIndexedAccess
-            return isTypeAnyOrAllConstituentTypesHaveKind(checkComputedPropertyName(name), 340 /* NumberLike */);
-        }
-        function isTypeAnyOrAllConstituentTypesHaveKind(type, kind) {
-            return isTypeAny(type) || isTypeOfKind(type, kind);
         }
-        function isInfinityOrNaNString(name) {
-            return name === "Infinity" || name === "-Infinity" || name === "NaN";
-        }
-        function isNumericLiteralName(name) {
-            // The intent of numeric names is that
-            //     - they are names with text in a numeric form, and that
-            //     - setting properties/indexing with them is always equivalent to doing so with the numeric literal 'numLit',
-            //         acquired by applying the abstract 'ToNumber' operation on the name's text.
-            //
-            // The subtlety is in the latter portion, as we cannot reliably say that anything that looks like a numeric literal is a numeric name.
-            // In fact, it is the case that the text of the name must be equal to 'ToString(numLit)' for this to hold.
-            //
-            // Consider the property name '"0xF00D"'. When one indexes with '0xF00D', they are actually indexing with the value of 'ToString(0xF00D)'
-            // according to the ECMAScript specification, so it is actually as if the user indexed with the string '"61453"'.
-            // Thus, the text of all numeric literals equivalent to '61543' such as '0xF00D', '0xf00D', '0170015', etc. are not valid numeric names
-            // because their 'ToString' representation is not equal to their original text.
-            // This is motivated by ECMA-262 sections 9.3.1, 9.8.1, 11.1.5, and 11.2.1.
-            //
-            // Here, we test whether 'ToString(ToNumber(name))' is exactly equal to 'name'.
-            // The '+' prefix operator is equivalent here to applying the abstract ToNumber operation.
-            // Applying the 'toString()' method on a number gives us the abstract ToString operation on a number.
-            //
-            // Note that this accepts the values 'Infinity', '-Infinity', and 'NaN', and that this is intentional.
-            // This is desired behavior, because when indexing with them as numeric entities, you are indexing
-            // with the strings '"Infinity"', '"-Infinity"', and '"NaN"' respectively.
-            return (+name).toString() === name;
+        function getTypePredicateParent(node) {
+            switch (node.parent.kind) {
+                case 187 /* ArrowFunction */:
+                case 155 /* CallSignature */:
+                case 228 /* FunctionDeclaration */:
+                case 186 /* FunctionExpression */:
+                case 160 /* FunctionType */:
+                case 151 /* MethodDeclaration */:
+                case 150 /* MethodSignature */:
+                    var parent_13 = node.parent;
+                    if (node === parent_13.type) {
+                        return parent_13;
+                    }
+            }
         }
-        function checkComputedPropertyName(node) {
-            var links = getNodeLinks(node.expression);
-            if (!links.resolvedType) {
-                links.resolvedType = checkExpression(node.expression);
-                // This will allow types number, string, symbol or any. It will also allow enums, the unknown
-                // type, and any union of these types (like string | number).
-                if (!isTypeAnyOrAllConstituentTypesHaveKind(links.resolvedType, 340 /* NumberLike */ | 34 /* StringLike */ | 512 /* ESSymbol */)) {
-                    error(node, ts.Diagnostics.A_computed_property_name_must_be_of_type_string_number_symbol_or_any);
+        function checkIfTypePredicateVariableIsDeclaredInBindingPattern(pattern, predicateVariableNode, predicateVariableName) {
+            for (var _i = 0, _a = pattern.elements; _i < _a.length; _i++) {
+                var element = _a[_i];
+                if (ts.isOmittedExpression(element)) {
+                    continue;
                 }
-                else {
-                    checkThatExpressionIsProperSymbolReference(node.expression, links.resolvedType, /*reportError*/ true);
+                var name_25 = element.name;
+                if (name_25.kind === 71 /* Identifier */ &&
+                    name_25.text === predicateVariableName) {
+                    error(predicateVariableNode, ts.Diagnostics.A_type_predicate_cannot_reference_element_0_in_a_binding_pattern, predicateVariableName);
+                    return true;
                 }
-            }
-            return links.resolvedType;
-        }
-        function getObjectLiteralIndexInfo(node, properties, kind) {
-            var propTypes = [];
-            for (var i = 0; i < properties.length; i++) {
-                if (kind === 0 /* String */ || isNumericName(node.properties[i].name)) {
-                    propTypes.push(getTypeOfSymbol(properties[i]));
+                else if (name_25.kind === 175 /* ArrayBindingPattern */ ||
+                    name_25.kind === 174 /* ObjectBindingPattern */) {
+                    if (checkIfTypePredicateVariableIsDeclaredInBindingPattern(name_25, predicateVariableNode, predicateVariableName)) {
+                        return true;
+                    }
                 }
             }
-            var unionType = propTypes.length ? getUnionType(propTypes, /*subtypeReduction*/ true) : undefinedType;
-            return createIndexInfo(unionType, /*isReadonly*/ false);
         }
-        function checkObjectLiteral(node, contextualMapper) {
-            var inDestructuringPattern = ts.isAssignmentTarget(node);
+        function checkSignatureDeclaration(node) {
             // Grammar checking
-            checkGrammarObjectLiteralExpression(node, inDestructuringPattern);
-            var propertiesTable = ts.createMap();
-            var propertiesArray = [];
-            var contextualType = getApparentTypeOfContextualType(node);
-            var contextualTypeHasPattern = contextualType && contextualType.pattern &&
-                (contextualType.pattern.kind === 167 /* ObjectBindingPattern */ || contextualType.pattern.kind === 171 /* ObjectLiteralExpression */);
-            var typeFlags = 0;
-            var patternWithComputedProperties = false;
-            var hasComputedStringProperty = false;
-            var hasComputedNumberProperty = false;
-            for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
-                var memberDecl = _a[_i];
-                var member = memberDecl.symbol;
-                if (memberDecl.kind === 253 /* PropertyAssignment */ ||
-                    memberDecl.kind === 254 /* ShorthandPropertyAssignment */ ||
-                    ts.isObjectLiteralMethod(memberDecl)) {
-                    var type = void 0;
-                    if (memberDecl.kind === 253 /* PropertyAssignment */) {
-                        type = checkPropertyAssignment(memberDecl, contextualMapper);
-                    }
-                    else if (memberDecl.kind === 147 /* MethodDeclaration */) {
-                        type = checkObjectLiteralMethod(memberDecl, contextualMapper);
-                    }
-                    else {
-                        ts.Debug.assert(memberDecl.kind === 254 /* ShorthandPropertyAssignment */);
-                        type = checkExpressionForMutableLocation(memberDecl.name, contextualMapper);
-                    }
-                    typeFlags |= type.flags;
-                    var prop = createSymbol(4 /* Property */ | 67108864 /* Transient */ | member.flags, member.name);
-                    if (inDestructuringPattern) {
-                        // If object literal is an assignment pattern and if the assignment pattern specifies a default value
-                        // for the property, make the property optional.
-                        var isOptional = (memberDecl.kind === 253 /* PropertyAssignment */ && hasDefaultValue(memberDecl.initializer)) ||
-                            (memberDecl.kind === 254 /* ShorthandPropertyAssignment */ && memberDecl.objectAssignmentInitializer);
-                        if (isOptional) {
-                            prop.flags |= 536870912 /* Optional */;
-                        }
-                        if (ts.hasDynamicName(memberDecl)) {
-                            patternWithComputedProperties = true;
-                        }
+            if (node.kind === 157 /* IndexSignature */) {
+                checkGrammarIndexSignature(node);
+            }
+            else if (node.kind === 160 /* FunctionType */ || node.kind === 228 /* FunctionDeclaration */ || node.kind === 161 /* ConstructorType */ ||
+                node.kind === 155 /* CallSignature */ || node.kind === 152 /* Constructor */ ||
+                node.kind === 156 /* ConstructSignature */) {
+                checkGrammarFunctionLikeDeclaration(node);
+            }
+            var functionFlags = ts.getFunctionFlags(node);
+            if (!(functionFlags & 4 /* Invalid */)) {
+                // Async generators prior to ESNext require the __await and __asyncGenerator helpers
+                if ((functionFlags & 3 /* AsyncGenerator */) === 3 /* AsyncGenerator */ && languageVersion < 5 /* ESNext */) {
+                    checkExternalEmitHelpers(node, 6144 /* AsyncGeneratorIncludes */);
+                }
+                // Async functions prior to ES2017 require the __awaiter helper
+                if ((functionFlags & 3 /* AsyncGenerator */) === 2 /* Async */ && languageVersion < 4 /* ES2017 */) {
+                    checkExternalEmitHelpers(node, 64 /* Awaiter */);
+                }
+                // Generator functions, Async functions, and Async Generator functions prior to
+                // ES2015 require the __generator helper
+                if ((functionFlags & 3 /* AsyncGenerator */) !== 0 /* Normal */ && languageVersion < 2 /* ES2015 */) {
+                    checkExternalEmitHelpers(node, 128 /* Generator */);
+                }
+            }
+            checkTypeParameters(node.typeParameters);
+            ts.forEach(node.parameters, checkParameter);
+            // TODO(rbuckton): Should we start checking JSDoc types?
+            if (node.type) {
+                checkSourceElement(node.type);
+            }
+            if (produceDiagnostics) {
+                checkCollisionWithArgumentsInGeneratedCode(node);
+                var returnTypeNode = ts.getEffectiveReturnTypeNode(node);
+                if (noImplicitAny && !returnTypeNode) {
+                    switch (node.kind) {
+                        case 156 /* ConstructSignature */:
+                            error(node, ts.Diagnostics.Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type);
+                            break;
+                        case 155 /* CallSignature */:
+                            error(node, ts.Diagnostics.Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type);
+                            break;
                     }
-                    else if (contextualTypeHasPattern && !(contextualType.flags & 536870912 /* ObjectLiteralPatternWithComputedProperties */)) {
-                        // If object literal is contextually typed by the implied type of a binding pattern, and if the
-                        // binding pattern specifies a default value for the property, make the property optional.
-                        var impliedProp = getPropertyOfType(contextualType, member.name);
-                        if (impliedProp) {
-                            prop.flags |= impliedProp.flags & 536870912 /* Optional */;
+                }
+                if (returnTypeNode) {
+                    var functionFlags_1 = ts.getFunctionFlags(node);
+                    if ((functionFlags_1 & (4 /* Invalid */ | 1 /* Generator */)) === 1 /* Generator */) {
+                        var returnType = getTypeFromTypeNode(returnTypeNode);
+                        if (returnType === voidType) {
+                            error(returnTypeNode, ts.Diagnostics.A_generator_cannot_have_a_void_type_annotation);
                         }
-                        else if (!compilerOptions.suppressExcessPropertyErrors) {
-                            error(memberDecl.name, ts.Diagnostics.Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1, symbolToString(member), typeToString(contextualType));
+                        else {
+                            var generatorElementType = getIteratedTypeOfGenerator(returnType, (functionFlags_1 & 2 /* Async */) !== 0) || anyType;
+                            var iterableIteratorInstantiation = functionFlags_1 & 2 /* Async */
+                                ? createAsyncIterableIteratorType(generatorElementType) // AsyncGenerator function
+                                : createIterableIteratorType(generatorElementType); // Generator function
+                            // Naively, one could check that IterableIterator<any> is assignable to the return type annotation.
+                            // However, that would not catch the error in the following case.
+                            //
+                            //    interface BadGenerator extends Iterable<number>, Iterator<string> { }
+                            //    function* g(): BadGenerator { } // Iterable and Iterator have different types!
+                            //
+                            checkTypeAssignableTo(iterableIteratorInstantiation, returnType, returnTypeNode);
                         }
                     }
-                    prop.declarations = member.declarations;
-                    prop.parent = member.parent;
-                    if (member.valueDeclaration) {
-                        prop.valueDeclaration = member.valueDeclaration;
+                    else if ((functionFlags_1 & 3 /* AsyncGenerator */) === 2 /* Async */) {
+                        checkAsyncFunctionReturnType(node);
                     }
-                    prop.type = type;
-                    prop.target = member;
-                    member = prop;
                 }
-                else {
-                    // TypeScript 1.0 spec (April 2014)
-                    // A get accessor declaration is processed in the same manner as
-                    // an ordinary function declaration(section 6.1) with no parameters.
-                    // A set accessor declaration is processed in the same manner
-                    // as an ordinary function declaration with a single parameter and a Void return type.
-                    ts.Debug.assert(memberDecl.kind === 149 /* GetAccessor */ || memberDecl.kind === 150 /* SetAccessor */);
-                    checkAccessorDeclaration(memberDecl);
+                if (noUnusedIdentifiers && !node.body) {
+                    checkUnusedTypeParameters(node);
                 }
-                if (ts.hasDynamicName(memberDecl)) {
-                    if (isNumericName(memberDecl.name)) {
-                        hasComputedNumberProperty = true;
-                    }
-                    else {
-                        hasComputedStringProperty = true;
+            }
+        }
+        function checkClassForDuplicateDeclarations(node) {
+            var Declaration;
+            (function (Declaration) {
+                Declaration[Declaration["Getter"] = 1] = "Getter";
+                Declaration[Declaration["Setter"] = 2] = "Setter";
+                Declaration[Declaration["Method"] = 4] = "Method";
+                Declaration[Declaration["Property"] = 3] = "Property";
+            })(Declaration || (Declaration = {}));
+            var instanceNames = ts.createMap();
+            var staticNames = ts.createMap();
+            for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
+                var member = _a[_i];
+                if (member.kind === 152 /* Constructor */) {
+                    for (var _b = 0, _c = member.parameters; _b < _c.length; _b++) {
+                        var param = _c[_b];
+                        if (ts.isParameterPropertyDeclaration(param)) {
+                            addName(instanceNames, param.name, param.name.text, 3 /* Property */);
+                        }
                     }
                 }
                 else {
-                    propertiesTable[member.name] = member;
+                    var isStatic = ts.getModifierFlags(member) & 32 /* Static */;
+                    var names = isStatic ? staticNames : instanceNames;
+                    var memberName = member.name && ts.getPropertyNameForPropertyNameNode(member.name);
+                    if (memberName) {
+                        switch (member.kind) {
+                            case 153 /* GetAccessor */:
+                                addName(names, member.name, memberName, 1 /* Getter */);
+                                break;
+                            case 154 /* SetAccessor */:
+                                addName(names, member.name, memberName, 2 /* Setter */);
+                                break;
+                            case 149 /* PropertyDeclaration */:
+                                addName(names, member.name, memberName, 3 /* Property */);
+                                break;
+                            case 151 /* MethodDeclaration */:
+                                addName(names, member.name, memberName, 4 /* Method */);
+                                break;
+                        }
+                    }
                 }
-                propertiesArray.push(member);
             }
-            // If object literal is contextually typed by the implied type of a binding pattern, augment the result
-            // type with those properties for which the binding pattern specifies a default value.
-            if (contextualTypeHasPattern) {
-                for (var _b = 0, _c = getPropertiesOfType(contextualType); _b < _c.length; _b++) {
-                    var prop = _c[_b];
-                    if (!propertiesTable[prop.name]) {
-                        if (!(prop.flags & 536870912 /* Optional */)) {
-                            error(prop.valueDeclaration || prop.bindingElement, ts.Diagnostics.Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value);
+            function addName(names, location, name, meaning) {
+                var prev = names.get(name);
+                if (prev) {
+                    if (prev & 4 /* Method */) {
+                        if (meaning !== 4 /* Method */) {
+                            error(location, ts.Diagnostics.Duplicate_identifier_0, ts.getTextOfNode(location));
                         }
-                        propertiesTable[prop.name] = prop;
-                        propertiesArray.push(prop);
+                    }
+                    else if (prev & meaning) {
+                        error(location, ts.Diagnostics.Duplicate_identifier_0, ts.getTextOfNode(location));
+                    }
+                    else {
+                        names.set(name, prev | meaning);
                     }
                 }
-            }
-            var stringIndexInfo = hasComputedStringProperty ? getObjectLiteralIndexInfo(node, propertiesArray, 0 /* String */) : undefined;
-            var numberIndexInfo = hasComputedNumberProperty ? getObjectLiteralIndexInfo(node, propertiesArray, 1 /* Number */) : undefined;
-            var result = createAnonymousType(node.symbol, propertiesTable, emptyArray, emptyArray, stringIndexInfo, numberIndexInfo);
-            var freshObjectLiteralFlag = compilerOptions.suppressExcessPropertyErrors ? 0 : 16777216 /* FreshLiteral */;
-            result.flags |= 8388608 /* ObjectLiteral */ | 67108864 /* ContainsObjectLiteral */ | freshObjectLiteralFlag | (typeFlags & 234881024 /* PropagatingFlags */) | (patternWithComputedProperties ? 536870912 /* ObjectLiteralPatternWithComputedProperties */ : 0);
-            if (inDestructuringPattern) {
-                result.pattern = node;
-            }
-            return result;
-        }
-        function checkJsxSelfClosingElement(node) {
-            checkJsxOpeningLikeElement(node);
-            return jsxElementType || anyType;
-        }
-        function checkJsxElement(node) {
-            // Check attributes
-            checkJsxOpeningLikeElement(node.openingElement);
-            // Perform resolution on the closing tag so that rename/go to definition/etc work
-            if (isJsxIntrinsicIdentifier(node.closingElement.tagName)) {
-                getIntrinsicTagSymbol(node.closingElement);
-            }
-            else {
-                checkExpression(node.closingElement.tagName);
-            }
-            // Check children
-            for (var _i = 0, _a = node.children; _i < _a.length; _i++) {
-                var child = _a[_i];
-                switch (child.kind) {
-                    case 248 /* JsxExpression */:
-                        checkJsxExpression(child);
-                        break;
-                    case 241 /* JsxElement */:
-                        checkJsxElement(child);
-                        break;
-                    case 242 /* JsxSelfClosingElement */:
-                        checkJsxSelfClosingElement(child);
-                        break;
+                else {
+                    names.set(name, meaning);
                 }
             }
-            return jsxElementType || anyType;
-        }
-        /**
-         * Returns true iff the JSX element name would be a valid JS identifier, ignoring restrictions about keywords not being identifiers
-         */
-        function isUnhyphenatedJsxName(name) {
-            // - is the only character supported in JSX attribute names that isn't valid in JavaScript identifiers
-            return name.indexOf("-") < 0;
         }
         /**
-         * Returns true iff React would emit this tag name as a string rather than an identifier or qualified name
+         * Static members being set on a constructor function may conflict with built-in properties
+         * of Function. Esp. in ECMAScript 5 there are non-configurable and non-writable
+         * built-in properties. This check issues a transpile error when a class has a static
+         * member with the same name as a non-writable built-in property.
+         *
+         * @see http://www.ecma-international.org/ecma-262/5.1/#sec-15.3.3
+         * @see http://www.ecma-international.org/ecma-262/5.1/#sec-15.3.5
+         * @see http://www.ecma-international.org/ecma-262/6.0/#sec-properties-of-the-function-constructor
+         * @see http://www.ecma-international.org/ecma-262/6.0/#sec-function-instances
          */
-        function isJsxIntrinsicIdentifier(tagName) {
-            // TODO (yuisu): comment
-            if (tagName.kind === 172 /* PropertyAccessExpression */ || tagName.kind === 97 /* ThisKeyword */) {
-                return false;
-            }
-            else {
-                return ts.isIntrinsicJsxName(tagName.text);
+        function checkClassForStaticPropertyNameConflicts(node) {
+            for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
+                var member = _a[_i];
+                var memberNameNode = member.name;
+                var isStatic = ts.getModifierFlags(member) & 32 /* Static */;
+                if (isStatic && memberNameNode) {
+                    var memberName = ts.getPropertyNameForPropertyNameNode(memberNameNode);
+                    switch (memberName) {
+                        case "name":
+                        case "length":
+                        case "caller":
+                        case "arguments":
+                        case "prototype":
+                            var message = ts.Diagnostics.Static_property_0_conflicts_with_built_in_property_Function_0_of_constructor_function_1;
+                            var className = getNameOfSymbol(getSymbolOfNode(node));
+                            error(memberNameNode, message, memberName, className);
+                            break;
+                    }
+                }
             }
         }
-        function checkJsxAttribute(node, elementAttributesType, nameTable) {
-            var correspondingPropType = undefined;
-            // Look up the corresponding property for this attribute
-            if (elementAttributesType === emptyObjectType && isUnhyphenatedJsxName(node.name.text)) {
-                // If there is no 'props' property, you may not have non-"data-" attributes
-                error(node.parent, ts.Diagnostics.JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property, getJsxElementPropertiesName());
-            }
-            else if (elementAttributesType && !isTypeAny(elementAttributesType)) {
-                var correspondingPropSymbol = getPropertyOfType(elementAttributesType, node.name.text);
-                correspondingPropType = correspondingPropSymbol && getTypeOfSymbol(correspondingPropSymbol);
-                if (isUnhyphenatedJsxName(node.name.text)) {
-                    var attributeType = getTypeOfPropertyOfType(elementAttributesType, getTextOfPropertyName(node.name)) || getIndexTypeOfType(elementAttributesType, 0 /* String */);
-                    if (attributeType) {
-                        correspondingPropType = attributeType;
+        function checkObjectTypeForDuplicateDeclarations(node) {
+            var names = ts.createMap();
+            for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
+                var member = _a[_i];
+                if (member.kind === 148 /* PropertySignature */) {
+                    var memberName = void 0;
+                    switch (member.name.kind) {
+                        case 9 /* StringLiteral */:
+                        case 8 /* NumericLiteral */:
+                        case 71 /* Identifier */:
+                            memberName = member.name.text;
+                            break;
+                        default:
+                            continue;
+                    }
+                    if (names.get(memberName)) {
+                        error(ts.getNameOfDeclaration(member.symbol.valueDeclaration), ts.Diagnostics.Duplicate_identifier_0, memberName);
+                        error(member.name, ts.Diagnostics.Duplicate_identifier_0, memberName);
                     }
                     else {
-                        // If there's no corresponding property with this name, error
-                        if (!correspondingPropType) {
-                            error(node.name, ts.Diagnostics.Property_0_does_not_exist_on_type_1, node.name.text, typeToString(elementAttributesType));
-                            return unknownType;
-                        }
+                        names.set(memberName, true);
                     }
                 }
             }
-            var exprType;
-            if (node.initializer) {
-                exprType = checkExpression(node.initializer);
-            }
-            else {
-                // <Elem attr /> is sugar for <Elem attr={true} />
-                exprType = booleanType;
-            }
-            if (correspondingPropType) {
-                checkTypeAssignableTo(exprType, correspondingPropType, node);
-            }
-            nameTable[node.name.text] = true;
-            return exprType;
         }
-        function checkJsxSpreadAttribute(node, elementAttributesType, nameTable) {
-            var type = checkExpression(node.expression);
-            var props = getPropertiesOfType(type);
-            for (var _i = 0, props_2 = props; _i < props_2.length; _i++) {
-                var prop = props_2[_i];
-                // Is there a corresponding property in the element attributes type? Skip checking of properties
-                // that have already been assigned to, as these are not actually pushed into the resulting type
-                if (!nameTable[prop.name]) {
-                    var targetPropSym = getPropertyOfType(elementAttributesType, prop.name);
-                    if (targetPropSym) {
-                        var msg = ts.chainDiagnosticMessages(undefined, ts.Diagnostics.Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property, prop.name);
-                        checkTypeAssignableTo(getTypeOfSymbol(prop), getTypeOfSymbol(targetPropSym), node, undefined, msg);
+        function checkTypeForDuplicateIndexSignatures(node) {
+            if (node.kind === 230 /* InterfaceDeclaration */) {
+                var nodeSymbol = getSymbolOfNode(node);
+                // in case of merging interface declaration it is possible that we'll enter this check procedure several times for every declaration
+                // to prevent this run check only for the first declaration of a given kind
+                if (nodeSymbol.declarations.length > 0 && nodeSymbol.declarations[0] !== node) {
+                    return;
+                }
+            }
+            // TypeScript 1.0 spec (April 2014)
+            // 3.7.4: An object type can contain at most one string index signature and one numeric index signature.
+            // 8.5: A class declaration can have at most one string index member declaration and one numeric index member declaration
+            var indexSymbol = getIndexSymbol(getSymbolOfNode(node));
+            if (indexSymbol) {
+                var seenNumericIndexer = false;
+                var seenStringIndexer = false;
+                for (var _i = 0, _a = indexSymbol.declarations; _i < _a.length; _i++) {
+                    var decl = _a[_i];
+                    var declaration = decl;
+                    if (declaration.parameters.length === 1 && declaration.parameters[0].type) {
+                        switch (declaration.parameters[0].type.kind) {
+                            case 136 /* StringKeyword */:
+                                if (!seenStringIndexer) {
+                                    seenStringIndexer = true;
+                                }
+                                else {
+                                    error(declaration, ts.Diagnostics.Duplicate_string_index_signature);
+                                }
+                                break;
+                            case 133 /* NumberKeyword */:
+                                if (!seenNumericIndexer) {
+                                    seenNumericIndexer = true;
+                                }
+                                else {
+                                    error(declaration, ts.Diagnostics.Duplicate_number_index_signature);
+                                }
+                                break;
+                        }
                     }
-                    nameTable[prop.name] = true;
                 }
             }
-            return type;
         }
-        function getJsxType(name) {
-            if (jsxTypes[name] === undefined) {
-                return jsxTypes[name] = getExportedTypeFromNamespace(JsxNames.JSX, name) || unknownType;
-            }
-            return jsxTypes[name];
+        function checkPropertyDeclaration(node) {
+            // Grammar checking
+            checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarProperty(node) || checkGrammarComputedPropertyName(node.name);
+            checkVariableLikeDeclaration(node);
         }
-        /**
-          * Looks up an intrinsic tag name and returns a symbol that either points to an intrinsic
-          * property (in which case nodeLinks.jsxFlags will be IntrinsicNamedElement) or an intrinsic
-          * string index signature (in which case nodeLinks.jsxFlags will be IntrinsicIndexedElement).
-          * May also return unknownSymbol if both of these lookups fail.
-          */
-        function getIntrinsicTagSymbol(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedSymbol) {
-                var intrinsicElementsType = getJsxType(JsxNames.IntrinsicElements);
-                if (intrinsicElementsType !== unknownType) {
-                    // Property case
-                    var intrinsicProp = getPropertyOfType(intrinsicElementsType, node.tagName.text);
-                    if (intrinsicProp) {
-                        links.jsxFlags |= 1 /* IntrinsicNamedElement */;
-                        return links.resolvedSymbol = intrinsicProp;
-                    }
-                    // Intrinsic string indexer case
-                    var indexSignatureType = getIndexTypeOfType(intrinsicElementsType, 0 /* String */);
-                    if (indexSignatureType) {
-                        links.jsxFlags |= 2 /* IntrinsicIndexedElement */;
-                        return links.resolvedSymbol = intrinsicElementsType.symbol;
-                    }
-                    // Wasn't found
-                    error(node, ts.Diagnostics.Property_0_does_not_exist_on_type_1, node.tagName.text, "JSX." + JsxNames.IntrinsicElements);
-                    return links.resolvedSymbol = unknownSymbol;
-                }
-                else {
-                    if (compilerOptions.noImplicitAny) {
-                        error(node, ts.Diagnostics.JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists, JsxNames.IntrinsicElements);
-                    }
-                    return links.resolvedSymbol = unknownSymbol;
-                }
+        function checkMethodDeclaration(node) {
+            // Grammar checking
+            checkGrammarMethod(node) || checkGrammarComputedPropertyName(node.name);
+            // Grammar checking for modifiers is done inside the function checkGrammarFunctionLikeDeclaration
+            checkFunctionOrMethodDeclaration(node);
+            // Abstract methods cannot have an implementation.
+            // Extra checks are to avoid reporting multiple errors relating to the "abstractness" of the node.
+            if (ts.getModifierFlags(node) & 128 /* Abstract */ && node.body) {
+                error(node, ts.Diagnostics.Method_0_cannot_have_an_implementation_because_it_is_marked_abstract, ts.declarationNameToString(node.name));
             }
-            return links.resolvedSymbol;
         }
-        /**
-         * Given a JSX element that is a class element, finds the Element Instance Type. If the
-         * element is not a class element, or the class element type cannot be determined, returns 'undefined'.
-         * For example, in the element <MyClass>, the element instance type is `MyClass` (not `typeof MyClass`).
-         */
-        function getJsxElementInstanceType(node, valueType) {
-            ts.Debug.assert(!(valueType.flags & 524288 /* Union */));
-            if (isTypeAny(valueType)) {
-                // Short-circuit if the class tag is using an element type 'any'
-                return anyType;
+        function checkConstructorDeclaration(node) {
+            // Grammar check on signature of constructor and modifier of the constructor is done in checkSignatureDeclaration function.
+            checkSignatureDeclaration(node);
+            // Grammar check for checking only related to constructorDeclaration
+            checkGrammarConstructorTypeParameters(node) || checkGrammarConstructorTypeAnnotation(node);
+            checkSourceElement(node.body);
+            registerForUnusedIdentifiersCheck(node);
+            var symbol = getSymbolOfNode(node);
+            var firstDeclaration = ts.getDeclarationOfKind(symbol, node.kind);
+            // Only type check the symbol once
+            if (node === firstDeclaration) {
+                checkFunctionOrConstructorSymbol(symbol);
             }
-            // Resolve the signatures, preferring constructor
-            var signatures = getSignaturesOfType(valueType, 1 /* Construct */);
-            if (signatures.length === 0) {
-                // No construct signatures, try call signatures
-                signatures = getSignaturesOfType(valueType, 0 /* Call */);
-                if (signatures.length === 0) {
-                    // We found no signatures at all, which is an error
-                    error(node.tagName, ts.Diagnostics.JSX_element_type_0_does_not_have_any_construct_or_call_signatures, ts.getTextOfNode(node.tagName));
-                    return unknownType;
-                }
+            // exit early in the case of signature - super checks are not relevant to them
+            if (ts.nodeIsMissing(node.body)) {
+                return;
             }
-            return getUnionType(signatures.map(getReturnTypeOfSignature), /*subtypeReduction*/ true);
-        }
-        /// e.g. "props" for React.d.ts,
-        /// or 'undefined' if ElementAttributesProperty doesn't exist (which means all
-        ///     non-intrinsic elements' attributes type is 'any'),
-        /// or '' if it has 0 properties (which means every
-        ///     non-intrinsic elements' attributes type is the element instance type)
-        function getJsxElementPropertiesName() {
-            // JSX
-            var jsxNamespace = getGlobalSymbol(JsxNames.JSX, 1920 /* Namespace */, /*diagnosticMessage*/ undefined);
-            // JSX.ElementAttributesProperty [symbol]
-            var attribsPropTypeSym = jsxNamespace && getSymbol(jsxNamespace.exports, JsxNames.ElementAttributesPropertyNameContainer, 793064 /* Type */);
-            // JSX.ElementAttributesProperty [type]
-            var attribPropType = attribsPropTypeSym && getDeclaredTypeOfSymbol(attribsPropTypeSym);
-            // The properties of JSX.ElementAttributesProperty
-            var attribProperties = attribPropType && getPropertiesOfType(attribPropType);
-            if (attribProperties) {
-                // Element Attributes has zero properties, so the element attributes type will be the class instance type
-                if (attribProperties.length === 0) {
-                    return "";
+            if (!produceDiagnostics) {
+                return;
+            }
+            function containsSuperCallAsComputedPropertyName(n) {
+                var name = ts.getNameOfDeclaration(n);
+                return name && containsSuperCall(name);
+            }
+            function containsSuperCall(n) {
+                if (ts.isSuperCall(n)) {
+                    return true;
                 }
-                else if (attribProperties.length === 1) {
-                    return attribProperties[0].name;
+                else if (ts.isFunctionLike(n)) {
+                    return false;
                 }
-                else {
-                    error(attribsPropTypeSym.declarations[0], ts.Diagnostics.The_global_type_JSX_0_may_not_have_more_than_one_property, JsxNames.ElementAttributesPropertyNameContainer);
-                    return undefined;
+                else if (ts.isClassLike(n)) {
+                    return ts.forEach(n.members, containsSuperCallAsComputedPropertyName);
                 }
+                return ts.forEachChild(n, containsSuperCall);
             }
-            else {
-                // No interface exists, so the element attributes type will be an implicit any
-                return undefined;
-            }
-        }
-        /**
-         * Given React element instance type and the class type, resolve the Jsx type
-         * Pass elemType to handle individual type in the union typed element type.
-         */
-        function getResolvedJsxType(node, elemType, elemClassType) {
-            if (!elemType) {
-                elemType = checkExpression(node.tagName);
-            }
-            if (elemType.flags & 524288 /* Union */) {
-                var types = elemType.types;
-                return getUnionType(types.map(function (type) {
-                    return getResolvedJsxType(node, type, elemClassType);
-                }), /*subtypeReduction*/ true);
+            function markThisReferencesAsErrors(n) {
+                if (n.kind === 99 /* ThisKeyword */) {
+                    error(n, ts.Diagnostics.this_cannot_be_referenced_in_current_location);
+                }
+                else if (n.kind !== 186 /* FunctionExpression */ && n.kind !== 228 /* FunctionDeclaration */) {
+                    ts.forEachChild(n, markThisReferencesAsErrors);
+                }
             }
-            // If the elemType is a string type, we have to return anyType to prevent an error downstream as we will try to find construct or call signature of the type
-            if (elemType.flags & 2 /* String */) {
-                return anyType;
+            function isInstancePropertyWithInitializer(n) {
+                return n.kind === 149 /* PropertyDeclaration */ &&
+                    !(ts.getModifierFlags(n) & 32 /* Static */) &&
+                    !!n.initializer;
             }
-            else if (elemType.flags & 32 /* StringLiteral */) {
-                // If the elemType is a stringLiteral type, we can then provide a check to make sure that the string literal type is one of the Jsx intrinsic element type
-                var intrinsicElementsType = getJsxType(JsxNames.IntrinsicElements);
-                if (intrinsicElementsType !== unknownType) {
-                    var stringLiteralTypeName = elemType.text;
-                    var intrinsicProp = getPropertyOfType(intrinsicElementsType, stringLiteralTypeName);
-                    if (intrinsicProp) {
-                        return getTypeOfSymbol(intrinsicProp);
+            // TS 1.0 spec (April 2014): 8.3.2
+            // Constructors of classes with no extends clause may not contain super calls, whereas
+            // constructors of derived classes must contain at least one super call somewhere in their function body.
+            var containingClassDecl = node.parent;
+            if (ts.getClassExtendsHeritageClauseElement(containingClassDecl)) {
+                captureLexicalThis(node.parent, containingClassDecl);
+                var classExtendsNull = classDeclarationExtendsNull(containingClassDecl);
+                var superCall = getSuperCallInConstructor(node);
+                if (superCall) {
+                    if (classExtendsNull) {
+                        error(superCall, ts.Diagnostics.A_constructor_cannot_contain_a_super_call_when_its_class_extends_null);
                     }
-                    var indexSignatureType = getIndexTypeOfType(intrinsicElementsType, 0 /* String */);
-                    if (indexSignatureType) {
-                        return indexSignatureType;
+                    // The first statement in the body of a constructor (excluding prologue directives) must be a super call
+                    // if both of the following are true:
+                    // - The containing class is a derived class.
+                    // - The constructor declares parameter properties
+                    //   or the containing class declares instance member variables with initializers.
+                    var superCallShouldBeFirst = ts.forEach(node.parent.members, isInstancePropertyWithInitializer) ||
+                        ts.forEach(node.parameters, function (p) { return ts.getModifierFlags(p) & 92 /* ParameterPropertyModifier */; });
+                    // Skip past any prologue directives to find the first statement
+                    // to ensure that it was a super call.
+                    if (superCallShouldBeFirst) {
+                        var statements = node.body.statements;
+                        var superCallStatement = void 0;
+                        for (var _i = 0, statements_2 = statements; _i < statements_2.length; _i++) {
+                            var statement = statements_2[_i];
+                            if (statement.kind === 210 /* ExpressionStatement */ && ts.isSuperCall(statement.expression)) {
+                                superCallStatement = statement;
+                                break;
+                            }
+                            if (!ts.isPrologueDirective(statement)) {
+                                break;
+                            }
+                        }
+                        if (!superCallStatement) {
+                            error(node, ts.Diagnostics.A_super_call_must_be_the_first_statement_in_the_constructor_when_a_class_contains_initialized_properties_or_has_parameter_properties);
+                        }
                     }
-                    error(node, ts.Diagnostics.Property_0_does_not_exist_on_type_1, stringLiteralTypeName, "JSX." + JsxNames.IntrinsicElements);
                 }
-                // If we need to report an error, we already done so here. So just return any to prevent any more error downstream
-                return anyType;
+                else if (!classExtendsNull) {
+                    error(node, ts.Diagnostics.Constructors_for_derived_classes_must_contain_a_super_call);
+                }
             }
-            // Get the element instance type (the result of newing or invoking this tag)
-            var elemInstanceType = getJsxElementInstanceType(node, elemType);
-            if (!elemClassType || !isTypeAssignableTo(elemInstanceType, elemClassType)) {
-                // Is this is a stateless function component? See if its single signature's return type is
-                // assignable to the JSX Element Type
-                if (jsxElementType) {
-                    var callSignatures = elemType && getSignaturesOfType(elemType, 0 /* Call */);
-                    var callSignature = callSignatures && callSignatures.length > 0 && callSignatures[0];
-                    var callReturnType = callSignature && getReturnTypeOfSignature(callSignature);
-                    var paramType = callReturnType && (callSignature.parameters.length === 0 ? emptyObjectType : getTypeOfSymbol(callSignature.parameters[0]));
-                    if (callReturnType && isTypeAssignableTo(callReturnType, jsxElementType)) {
-                        // Intersect in JSX.IntrinsicAttributes if it exists
-                        var intrinsicAttributes = getJsxType(JsxNames.IntrinsicAttributes);
-                        if (intrinsicAttributes !== unknownType) {
-                            paramType = intersectTypes(intrinsicAttributes, paramType);
+        }
+        function checkAccessorDeclaration(node) {
+            if (produceDiagnostics) {
+                // Grammar checking accessors
+                checkGrammarFunctionLikeDeclaration(node) || checkGrammarAccessor(node) || checkGrammarComputedPropertyName(node.name);
+                checkDecorators(node);
+                checkSignatureDeclaration(node);
+                if (node.kind === 153 /* GetAccessor */) {
+                    if (!ts.isInAmbientContext(node) && ts.nodeIsPresent(node.body) && (node.flags & 128 /* HasImplicitReturn */)) {
+                        if (!(node.flags & 256 /* HasExplicitReturn */)) {
+                            error(node.name, ts.Diagnostics.A_get_accessor_must_return_a_value);
                         }
-                        return paramType;
                     }
                 }
-            }
-            // Issue an error if this return type isn't assignable to JSX.ElementClass
-            if (elemClassType) {
-                checkTypeRelatedTo(elemInstanceType, elemClassType, assignableRelation, node, ts.Diagnostics.JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements);
-            }
-            if (isTypeAny(elemInstanceType)) {
-                return elemInstanceType;
-            }
-            var propsName = getJsxElementPropertiesName();
-            if (propsName === undefined) {
-                // There is no type ElementAttributesProperty, return 'any'
-                return anyType;
-            }
-            else if (propsName === "") {
-                // If there is no e.g. 'props' member in ElementAttributesProperty, use the element class type instead
-                return elemInstanceType;
-            }
-            else {
-                var attributesType = getTypeOfPropertyOfType(elemInstanceType, propsName);
-                if (!attributesType) {
-                    // There is no property named 'props' on this instance type
-                    return emptyObjectType;
-                }
-                else if (isTypeAny(attributesType) || (attributesType === unknownType)) {
-                    // Props is of type 'any' or unknown
-                    return attributesType;
-                }
-                else if (attributesType.flags & 524288 /* Union */) {
-                    // Props cannot be a union type
-                    error(node.tagName, ts.Diagnostics.JSX_element_attributes_type_0_may_not_be_a_union_type, typeToString(attributesType));
-                    return anyType;
+                // Do not use hasDynamicName here, because that returns false for well known symbols.
+                // We want to perform checkComputedPropertyName for all computed properties, including
+                // well known symbols.
+                if (node.name.kind === 144 /* ComputedPropertyName */) {
+                    checkComputedPropertyName(node.name);
                 }
-                else {
-                    // Normal case -- add in IntrinsicClassElements<T> and IntrinsicElements
-                    var apparentAttributesType = attributesType;
-                    var intrinsicClassAttribs = getJsxType(JsxNames.IntrinsicClassAttributes);
-                    if (intrinsicClassAttribs !== unknownType) {
-                        var typeParams = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(intrinsicClassAttribs.symbol);
-                        if (typeParams) {
-                            if (typeParams.length === 1) {
-                                apparentAttributesType = intersectTypes(createTypeReference(intrinsicClassAttribs, [elemInstanceType]), apparentAttributesType);
-                            }
+                if (!ts.hasDynamicName(node)) {
+                    // TypeScript 1.0 spec (April 2014): 8.4.3
+                    // Accessors for the same member name must specify the same accessibility.
+                    var otherKind = node.kind === 153 /* GetAccessor */ ? 154 /* SetAccessor */ : 153 /* GetAccessor */;
+                    var otherAccessor = ts.getDeclarationOfKind(node.symbol, otherKind);
+                    if (otherAccessor) {
+                        if ((ts.getModifierFlags(node) & 28 /* AccessibilityModifier */) !== (ts.getModifierFlags(otherAccessor) & 28 /* AccessibilityModifier */)) {
+                            error(node.name, ts.Diagnostics.Getter_and_setter_accessors_do_not_agree_in_visibility);
                         }
-                        else {
-                            apparentAttributesType = intersectTypes(attributesType, intrinsicClassAttribs);
+                        if (ts.hasModifier(node, 128 /* Abstract */) !== ts.hasModifier(otherAccessor, 128 /* Abstract */)) {
+                            error(node.name, ts.Diagnostics.Accessors_must_both_be_abstract_or_non_abstract);
                         }
-                    }
-                    var intrinsicAttribs = getJsxType(JsxNames.IntrinsicAttributes);
-                    if (intrinsicAttribs !== unknownType) {
-                        apparentAttributesType = intersectTypes(intrinsicAttribs, apparentAttributesType);
-                    }
-                    return apparentAttributesType;
-                }
-            }
-        }
-        /**
-         * Given an opening/self-closing element, get the 'element attributes type', i.e. the type that tells
-         * us which attributes are valid on a given element.
-         */
-        function getJsxElementAttributesType(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedJsxType) {
-                if (isJsxIntrinsicIdentifier(node.tagName)) {
-                    var symbol = getIntrinsicTagSymbol(node);
-                    if (links.jsxFlags & 1 /* IntrinsicNamedElement */) {
-                        return links.resolvedJsxType = getTypeOfSymbol(symbol);
-                    }
-                    else if (links.jsxFlags & 2 /* IntrinsicIndexedElement */) {
-                        return links.resolvedJsxType = getIndexInfoOfSymbol(symbol, 0 /* String */).type;
-                    }
-                    else {
-                        return links.resolvedJsxType = unknownType;
+                        // TypeScript 1.0 spec (April 2014): 4.5
+                        // If both accessors include type annotations, the specified types must be identical.
+                        checkAccessorDeclarationTypesIdentical(node, otherAccessor, getAnnotatedAccessorType, ts.Diagnostics.get_and_set_accessor_must_have_the_same_type);
+                        checkAccessorDeclarationTypesIdentical(node, otherAccessor, getThisTypeOfDeclaration, ts.Diagnostics.get_and_set_accessor_must_have_the_same_this_type);
                     }
                 }
-                else {
-                    var elemClassType = getJsxGlobalElementClassType();
-                    return links.resolvedJsxType = getResolvedJsxType(node, undefined, elemClassType);
+                var returnType = getTypeOfAccessors(getSymbolOfNode(node));
+                if (node.kind === 153 /* GetAccessor */) {
+                    checkAllCodePathsInNonVoidFunctionReturnOrThrow(node, returnType);
                 }
             }
-            return links.resolvedJsxType;
-        }
-        /**
-         * Given a JSX attribute, returns the symbol for the corresponds property
-         * of the element attributes type. Will return unknownSymbol for attributes
-         * that have no matching element attributes type property.
-         */
-        function getJsxAttributePropertySymbol(attrib) {
-            var attributesType = getJsxElementAttributesType(attrib.parent);
-            var prop = getPropertyOfType(attributesType, attrib.name.text);
-            return prop || unknownSymbol;
+            checkSourceElement(node.body);
+            registerForUnusedIdentifiersCheck(node);
         }
-        function getJsxGlobalElementClassType() {
-            if (!jsxElementClassType) {
-                jsxElementClassType = getExportedTypeFromNamespace(JsxNames.JSX, JsxNames.ElementClass);
+        function checkAccessorDeclarationTypesIdentical(first, second, getAnnotatedType, message) {
+            var firstType = getAnnotatedType(first);
+            var secondType = getAnnotatedType(second);
+            if (firstType && secondType && !isTypeIdenticalTo(firstType, secondType)) {
+                error(first, message);
             }
-            return jsxElementClassType;
         }
-        /// Returns all the properties of the Jsx.IntrinsicElements interface
-        function getJsxIntrinsicTagNames() {
-            var intrinsics = getJsxType(JsxNames.IntrinsicElements);
-            return intrinsics ? getPropertiesOfType(intrinsics) : emptyArray;
+        function checkMissingDeclaration(node) {
+            checkDecorators(node);
         }
-        function checkJsxPreconditions(errorNode) {
-            // Preconditions for using JSX
-            if ((compilerOptions.jsx || 0 /* None */) === 0 /* None */) {
-                error(errorNode, ts.Diagnostics.Cannot_use_JSX_unless_the_jsx_flag_is_provided);
-            }
-            if (jsxElementType === undefined) {
-                if (compilerOptions.noImplicitAny) {
-                    error(errorNode, ts.Diagnostics.JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist);
+        function checkTypeArgumentConstraints(typeParameters, typeArgumentNodes) {
+            var minTypeArgumentCount = getMinTypeArgumentCount(typeParameters);
+            var typeArguments;
+            var mapper;
+            var result = true;
+            for (var i = 0; i < typeParameters.length; i++) {
+                var constraint = getConstraintOfTypeParameter(typeParameters[i]);
+                if (constraint) {
+                    if (!typeArguments) {
+                        typeArguments = fillMissingTypeArguments(ts.map(typeArgumentNodes, getTypeFromTypeNode), typeParameters, minTypeArgumentCount);
+                        mapper = createTypeMapper(typeParameters, typeArguments);
+                    }
+                    var typeArgument = typeArguments[i];
+                    result = result && checkTypeAssignableTo(typeArgument, getTypeWithThisArgument(instantiateType(constraint, mapper), typeArgument), typeArgumentNodes[i], ts.Diagnostics.Type_0_does_not_satisfy_the_constraint_1);
                 }
             }
+            return result;
         }
-        function checkJsxOpeningLikeElement(node) {
-            checkGrammarJsxElement(node);
-            checkJsxPreconditions(node);
-            // The reactNamespace symbol should be marked as 'used' so we don't incorrectly elide its import. And if there
-            // is no reactNamespace symbol in scope when targeting React emit, we should issue an error.
-            var reactRefErr = compilerOptions.jsx === 2 /* React */ ? ts.Diagnostics.Cannot_find_name_0 : undefined;
-            var reactNamespace = compilerOptions.reactNamespace ? compilerOptions.reactNamespace : "React";
-            var reactSym = resolveName(node.tagName, reactNamespace, 107455 /* Value */, reactRefErr, reactNamespace);
-            if (reactSym) {
-                getSymbolLinks(reactSym).referenced = true;
-            }
-            var targetAttributesType = getJsxElementAttributesType(node);
-            var nameTable = ts.createMap();
-            // Process this array in right-to-left order so we know which
-            // attributes (mostly from spreads) are being overwritten and
-            // thus should have their types ignored
-            var sawSpreadedAny = false;
-            for (var i = node.attributes.length - 1; i >= 0; i--) {
-                if (node.attributes[i].kind === 246 /* JsxAttribute */) {
-                    checkJsxAttribute((node.attributes[i]), targetAttributesType, nameTable);
-                }
-                else {
-                    ts.Debug.assert(node.attributes[i].kind === 247 /* JsxSpreadAttribute */);
-                    var spreadType = checkJsxSpreadAttribute((node.attributes[i]), targetAttributesType, nameTable);
-                    if (isTypeAny(spreadType)) {
-                        sawSpreadedAny = true;
+        function checkTypeReferenceNode(node) {
+            checkGrammarTypeArguments(node, node.typeArguments);
+            var type = getTypeFromTypeReference(node);
+            if (type !== unknownType) {
+                if (node.typeArguments) {
+                    // Do type argument local checks only if referenced type is successfully resolved
+                    ts.forEach(node.typeArguments, checkSourceElement);
+                    if (produceDiagnostics) {
+                        var symbol = getNodeLinks(node).resolvedSymbol;
+                        var typeParameters = symbol.flags & 524288 /* TypeAlias */ ? getSymbolLinks(symbol).typeParameters : type.target.localTypeParameters;
+                        checkTypeArgumentConstraints(typeParameters, node.typeArguments);
                     }
                 }
-            }
-            // Check that all required properties have been provided. If an 'any'
-            // was spreaded in, though, assume that it provided all required properties
-            if (targetAttributesType && !sawSpreadedAny) {
-                var targetProperties = getPropertiesOfType(targetAttributesType);
-                for (var i = 0; i < targetProperties.length; i++) {
-                    if (!(targetProperties[i].flags & 536870912 /* Optional */) &&
-                        !nameTable[targetProperties[i].name]) {
-                        error(node, ts.Diagnostics.Property_0_is_missing_in_type_1, targetProperties[i].name, typeToString(targetAttributesType));
-                    }
+                if (type.flags & 16 /* Enum */ && getNodeLinks(node).resolvedSymbol.flags & 8 /* EnumMember */) {
+                    error(node, ts.Diagnostics.Enum_type_0_has_members_with_initializers_that_are_not_literals, typeToString(type));
                 }
             }
         }
-        function checkJsxExpression(node) {
-            if (node.expression) {
-                return checkExpression(node.expression);
-            }
-            else {
-                return unknownType;
+        function checkTypeQuery(node) {
+            getTypeFromTypeQueryNode(node);
+        }
+        function checkTypeLiteral(node) {
+            ts.forEach(node.members, checkSourceElement);
+            if (produceDiagnostics) {
+                var type = getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node);
+                checkIndexConstraints(type);
+                checkTypeForDuplicateIndexSignatures(node);
+                checkObjectTypeForDuplicateDeclarations(node);
             }
         }
-        // If a symbol is a synthesized symbol with no value declaration, we assume it is a property. Example of this are the synthesized
-        // '.prototype' property as well as synthesized tuple index properties.
-        function getDeclarationKindFromSymbol(s) {
-            return s.valueDeclaration ? s.valueDeclaration.kind : 145 /* PropertyDeclaration */;
+        function checkArrayType(node) {
+            checkSourceElement(node.elementType);
         }
-        function getDeclarationModifierFlagsFromSymbol(s) {
-            return s.valueDeclaration ? ts.getCombinedModifierFlags(s.valueDeclaration) : s.flags & 134217728 /* Prototype */ ? 4 /* Public */ | 32 /* Static */ : 0;
+        function checkTupleType(node) {
+            // Grammar checking
+            var hasErrorFromDisallowedTrailingComma = checkGrammarForDisallowedTrailingComma(node.elementTypes);
+            if (!hasErrorFromDisallowedTrailingComma && node.elementTypes.length === 0) {
+                grammarErrorOnNode(node, ts.Diagnostics.A_tuple_type_element_list_cannot_be_empty);
+            }
+            ts.forEach(node.elementTypes, checkSourceElement);
         }
-        function getDeclarationNodeFlagsFromSymbol(s) {
-            return s.valueDeclaration ? ts.getCombinedNodeFlags(s.valueDeclaration) : 0;
+        function checkUnionOrIntersectionType(node) {
+            ts.forEach(node.types, checkSourceElement);
         }
-        /**
-         * Check whether the requested property access is valid.
-         * Returns true if node is a valid property access, and false otherwise.
-         * @param node The node to be checked.
-         * @param left The left hand side of the property access (e.g.: the super in `super.foo`).
-         * @param type The type of left.
-         * @param prop The symbol for the right hand side of the property access.
-         */
-        function checkClassPropertyAccess(node, left, type, prop) {
-            var flags = getDeclarationModifierFlagsFromSymbol(prop);
-            var declaringClass = getDeclaredTypeOfSymbol(getParentOfSymbol(prop));
-            var errorNode = node.kind === 172 /* PropertyAccessExpression */ || node.kind === 218 /* VariableDeclaration */ ?
-                node.name :
-                node.right;
-            if (left.kind === 95 /* SuperKeyword */) {
-                // TS 1.0 spec (April 2014): 4.8.2
-                // - In a constructor, instance member function, instance member accessor, or
-                //   instance member variable initializer where this references a derived class instance,
-                //   a super property access is permitted and must specify a public instance member function of the base class.
-                // - In a static member function or static member accessor
-                //   where this references the constructor function object of a derived class,
-                //   a super property access is permitted and must specify a public static member function of the base class.
-                if (languageVersion < 2 /* ES6 */ && getDeclarationKindFromSymbol(prop) !== 147 /* MethodDeclaration */) {
-                    // `prop` refers to a *property* declared in the super class
-                    // rather than a *method*, so it does not satisfy the above criteria.
-                    error(errorNode, ts.Diagnostics.Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword);
-                    return false;
-                }
-                if (flags & 128 /* Abstract */) {
-                    // A method cannot be accessed in a super property access if the method is abstract.
-                    // This error could mask a private property access error. But, a member
-                    // cannot simultaneously be private and abstract, so this will trigger an
-                    // additional error elsewhere.
-                    error(errorNode, ts.Diagnostics.Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression, symbolToString(prop), typeToString(declaringClass));
-                    return false;
-                }
-            }
-            // Public properties are otherwise accessible.
-            if (!(flags & 24 /* NonPublicAccessibilityModifier */)) {
-                return true;
-            }
-            // Property is known to be private or protected at this point
-            // Private property is accessible if the property is within the declaring class
-            if (flags & 8 /* Private */) {
-                var declaringClassDeclaration = getClassLikeDeclarationOfSymbol(getParentOfSymbol(prop));
-                if (!isNodeWithinClass(node, declaringClassDeclaration)) {
-                    error(errorNode, ts.Diagnostics.Property_0_is_private_and_only_accessible_within_class_1, symbolToString(prop), typeToString(declaringClass));
-                    return false;
-                }
-                return true;
-            }
-            // Property is known to be protected at this point
-            // All protected properties of a supertype are accessible in a super access
-            if (left.kind === 95 /* SuperKeyword */) {
-                return true;
-            }
-            // Get the enclosing class that has the declaring class as its base type
-            var enclosingClass = forEachEnclosingClass(node, function (enclosingDeclaration) {
-                var enclosingClass = getDeclaredTypeOfSymbol(getSymbolOfNode(enclosingDeclaration));
-                return hasBaseType(enclosingClass, declaringClass) ? enclosingClass : undefined;
-            });
-            // A protected property is accessible if the property is within the declaring class or classes derived from it
-            if (!enclosingClass) {
-                error(errorNode, ts.Diagnostics.Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses, symbolToString(prop), typeToString(declaringClass));
-                return false;
-            }
-            // No further restrictions for static properties
-            if (flags & 32 /* Static */) {
-                return true;
-            }
-            // An instance property must be accessed through an instance of the enclosing class
-            if (type.flags & 268435456 /* ThisType */) {
-                // get the original type -- represented as the type constraint of the 'this' type
-                type = getConstraintOfTypeParameter(type);
+        function checkIndexedAccessIndexType(type, accessNode) {
+            if (!(type.flags & 524288 /* IndexedAccess */)) {
+                return type;
             }
-            // TODO: why is the first part of this check here?
-            if (!(getTargetType(type).flags & (32768 /* Class */ | 65536 /* Interface */) && hasBaseType(type, enclosingClass))) {
-                error(errorNode, ts.Diagnostics.Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1, symbolToString(prop), typeToString(enclosingClass));
-                return false;
+            // Check if the index type is assignable to 'keyof T' for the object type.
+            var objectType = type.objectType;
+            var indexType = type.indexType;
+            if (isTypeAssignableTo(indexType, getIndexType(objectType))) {
+                return type;
             }
-            return true;
-        }
-        function checkNonNullExpression(node) {
-            var type = checkExpression(node);
-            if (strictNullChecks) {
-                var kind = getFalsyFlags(type) & 6144 /* Nullable */;
-                if (kind) {
-                    error(node, kind & 2048 /* Undefined */ ? kind & 4096 /* Null */ ?
-                        ts.Diagnostics.Object_is_possibly_null_or_undefined :
-                        ts.Diagnostics.Object_is_possibly_undefined :
-                        ts.Diagnostics.Object_is_possibly_null);
+            // Check if we're indexing with a numeric type and the object type is a generic
+            // type with a constraint that has a numeric index signature.
+            if (maybeTypeOfKind(objectType, 540672 /* TypeVariable */) && isTypeOfKind(indexType, 84 /* NumberLike */)) {
+                var constraint = getBaseConstraintOfType(objectType);
+                if (constraint && getIndexInfoOfType(constraint, 1 /* Number */)) {
+                    return type;
                 }
-                return getNonNullableType(type);
             }
+            error(accessNode, ts.Diagnostics.Type_0_cannot_be_used_to_index_type_1, typeToString(indexType), typeToString(objectType));
             return type;
         }
-        function checkPropertyAccessExpression(node) {
-            return checkPropertyAccessExpressionOrQualifiedName(node, node.expression, node.name);
+        function checkIndexedAccessType(node) {
+            checkIndexedAccessIndexType(getTypeFromIndexedAccessTypeNode(node), node);
         }
-        function checkQualifiedName(node) {
-            return checkPropertyAccessExpressionOrQualifiedName(node, node.left, node.right);
+        function checkMappedType(node) {
+            checkSourceElement(node.typeParameter);
+            checkSourceElement(node.type);
+            var type = getTypeFromMappedTypeNode(node);
+            var constraintType = getConstraintTypeFromMappedType(type);
+            checkTypeAssignableTo(constraintType, stringType, node.typeParameter.constraint);
         }
-        function checkPropertyAccessExpressionOrQualifiedName(node, left, right) {
-            var type = checkNonNullExpression(left);
-            if (isTypeAny(type) || type === silentNeverType) {
-                return type;
+        function isPrivateWithinAmbient(node) {
+            return (ts.getModifierFlags(node) & 8 /* Private */) && ts.isInAmbientContext(node);
+        }
+        function getEffectiveDeclarationFlags(n, flagsToCheck) {
+            var flags = ts.getCombinedModifierFlags(n);
+            // children of classes (even ambient classes) should not be marked as ambient or export
+            // because those flags have no useful semantics there.
+            if (n.parent.kind !== 230 /* InterfaceDeclaration */ &&
+                n.parent.kind !== 229 /* ClassDeclaration */ &&
+                n.parent.kind !== 199 /* ClassExpression */ &&
+                ts.isInAmbientContext(n)) {
+                if (!(flags & 2 /* Ambient */)) {
+                    // It is nested in an ambient context, which means it is automatically exported
+                    flags |= 1 /* Export */;
+                }
+                flags |= 2 /* Ambient */;
             }
-            var apparentType = getApparentType(getWidenedType(type));
-            if (apparentType === unknownType || (type.flags & 16384 /* TypeParameter */ && isTypeAny(apparentType))) {
-                // handle cases when type is Type parameter with invalid or any constraint
-                return apparentType;
+            return flags & flagsToCheck;
+        }
+        function checkFunctionOrConstructorSymbol(symbol) {
+            if (!produceDiagnostics) {
+                return;
             }
-            var prop = getPropertyOfType(apparentType, right.text);
-            if (!prop) {
-                if (right.text && !checkAndReportErrorForExtendingInterface(node)) {
-                    reportNonexistentProperty(right, type.flags & 268435456 /* ThisType */ ? apparentType : type);
+            function getCanonicalOverload(overloads, implementation) {
+                // Consider the canonical set of flags to be the flags of the bodyDeclaration or the first declaration
+                // Error on all deviations from this canonical set of flags
+                // The caveat is that if some overloads are defined in lib.d.ts, we don't want to
+                // report the errors on those. To achieve this, we will say that the implementation is
+                // the canonical signature only if it is in the same container as the first overload
+                var implementationSharesContainerWithFirstOverload = implementation !== undefined && implementation.parent === overloads[0].parent;
+                return implementationSharesContainerWithFirstOverload ? implementation : overloads[0];
+            }
+            function checkFlagAgreementBetweenOverloads(overloads, implementation, flagsToCheck, someOverloadFlags, allOverloadFlags) {
+                // Error if some overloads have a flag that is not shared by all overloads. To find the
+                // deviations, we XOR someOverloadFlags with allOverloadFlags
+                var someButNotAllOverloadFlags = someOverloadFlags ^ allOverloadFlags;
+                if (someButNotAllOverloadFlags !== 0) {
+                    var canonicalFlags_1 = getEffectiveDeclarationFlags(getCanonicalOverload(overloads, implementation), flagsToCheck);
+                    ts.forEach(overloads, function (o) {
+                        var deviation = getEffectiveDeclarationFlags(o, flagsToCheck) ^ canonicalFlags_1;
+                        if (deviation & 1 /* Export */) {
+                            error(ts.getNameOfDeclaration(o), ts.Diagnostics.Overload_signatures_must_all_be_exported_or_non_exported);
+                        }
+                        else if (deviation & 2 /* Ambient */) {
+                            error(ts.getNameOfDeclaration(o), ts.Diagnostics.Overload_signatures_must_all_be_ambient_or_non_ambient);
+                        }
+                        else if (deviation & (8 /* Private */ | 16 /* Protected */)) {
+                            error(ts.getNameOfDeclaration(o) || o, ts.Diagnostics.Overload_signatures_must_all_be_public_private_or_protected);
+                        }
+                        else if (deviation & 128 /* Abstract */) {
+                            error(ts.getNameOfDeclaration(o), ts.Diagnostics.Overload_signatures_must_all_be_abstract_or_non_abstract);
+                        }
+                    });
                 }
-                return unknownType;
             }
-            if (noUnusedIdentifiers &&
-                (prop.flags & 106500 /* ClassMember */) &&
-                prop.valueDeclaration && (ts.getModifierFlags(prop.valueDeclaration) & 8 /* Private */)) {
-                if (prop.flags & 16777216 /* Instantiated */) {
-                    getSymbolLinks(prop).target.isReferenced = true;
+            function checkQuestionTokenAgreementBetweenOverloads(overloads, implementation, someHaveQuestionToken, allHaveQuestionToken) {
+                if (someHaveQuestionToken !== allHaveQuestionToken) {
+                    var canonicalHasQuestionToken_1 = ts.hasQuestionToken(getCanonicalOverload(overloads, implementation));
+                    ts.forEach(overloads, function (o) {
+                        var deviation = ts.hasQuestionToken(o) !== canonicalHasQuestionToken_1;
+                        if (deviation) {
+                            error(ts.getNameOfDeclaration(o), ts.Diagnostics.Overload_signatures_must_all_be_optional_or_required);
+                        }
+                    });
+                }
+            }
+            var flagsToCheck = 1 /* Export */ | 2 /* Ambient */ | 8 /* Private */ | 16 /* Protected */ | 128 /* Abstract */;
+            var someNodeFlags = 0 /* None */;
+            var allNodeFlags = flagsToCheck;
+            var someHaveQuestionToken = false;
+            var allHaveQuestionToken = true;
+            var hasOverloads = false;
+            var bodyDeclaration;
+            var lastSeenNonAmbientDeclaration;
+            var previousDeclaration;
+            var declarations = symbol.declarations;
+            var isConstructor = (symbol.flags & 16384 /* Constructor */) !== 0;
+            function reportImplementationExpectedError(node) {
+                if (node.name && ts.nodeIsMissing(node.name)) {
+                    return;
+                }
+                var seen = false;
+                var subsequentNode = ts.forEachChild(node.parent, function (c) {
+                    if (seen) {
+                        return c;
+                    }
+                    else {
+                        seen = c === node;
+                    }
+                });
+                // We may be here because of some extra nodes between overloads that could not be parsed into a valid node.
+                // In this case the subsequent node is not really consecutive (.pos !== node.end), and we must ignore it here.
+                if (subsequentNode && subsequentNode.pos === node.end) {
+                    if (subsequentNode.kind === node.kind) {
+                        var errorNode_1 = subsequentNode.name || subsequentNode;
+                        // TODO(jfreeman): These are methods, so handle computed name case
+                        if (node.name && subsequentNode.name && node.name.text === subsequentNode.name.text) {
+                            var reportError = (node.kind === 151 /* MethodDeclaration */ || node.kind === 150 /* MethodSignature */) &&
+                                (ts.getModifierFlags(node) & 32 /* Static */) !== (ts.getModifierFlags(subsequentNode) & 32 /* Static */);
+                            // we can get here in two cases
+                            // 1. mixed static and instance class members
+                            // 2. something with the same name was defined before the set of overloads that prevents them from merging
+                            // here we'll report error only for the first case since for second we should already report error in binder
+                            if (reportError) {
+                                var diagnostic = ts.getModifierFlags(node) & 32 /* Static */ ? ts.Diagnostics.Function_overload_must_be_static : ts.Diagnostics.Function_overload_must_not_be_static;
+                                error(errorNode_1, diagnostic);
+                            }
+                            return;
+                        }
+                        else if (ts.nodeIsPresent(subsequentNode.body)) {
+                            error(errorNode_1, ts.Diagnostics.Function_implementation_name_must_be_0, ts.declarationNameToString(node.name));
+                            return;
+                        }
+                    }
+                }
+                var errorNode = node.name || node;
+                if (isConstructor) {
+                    error(errorNode, ts.Diagnostics.Constructor_implementation_is_missing);
                 }
                 else {
-                    prop.isReferenced = true;
+                    // Report different errors regarding non-consecutive blocks of declarations depending on whether
+                    // the node in question is abstract.
+                    if (ts.getModifierFlags(node) & 128 /* Abstract */) {
+                        error(errorNode, ts.Diagnostics.All_declarations_of_an_abstract_method_must_be_consecutive);
+                    }
+                    else {
+                        error(errorNode, ts.Diagnostics.Function_implementation_is_missing_or_not_immediately_following_the_declaration);
+                    }
                 }
             }
-            getNodeLinks(node).resolvedSymbol = prop;
-            if (prop.parent && prop.parent.flags & 32 /* Class */) {
-                checkClassPropertyAccess(node, left, apparentType, prop);
-            }
-            var propType = getTypeOfSymbol(prop);
-            // Only compute control flow type if this is a property access expression that isn't an
-            // assignment target, and the referenced property was declared as a variable, property,
-            // accessor, or optional method.
-            if (node.kind !== 172 /* PropertyAccessExpression */ || ts.isAssignmentTarget(node) ||
-                !(prop.flags & (3 /* Variable */ | 4 /* Property */ | 98304 /* Accessor */)) &&
-                    !(prop.flags & 8192 /* Method */ && propType.flags & 524288 /* Union */)) {
-                return propType;
-            }
-            return getFlowTypeOfReference(node, propType, /*assumeInitialized*/ true, /*flowContainer*/ undefined);
-            function reportNonexistentProperty(propNode, containingType) {
-                var errorInfo;
-                if (containingType.flags & 524288 /* Union */ && !(containingType.flags & 8190 /* Primitive */)) {
-                    for (var _i = 0, _a = containingType.types; _i < _a.length; _i++) {
-                        var subtype = _a[_i];
-                        if (!getPropertyOfType(subtype, propNode.text)) {
-                            errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.Property_0_does_not_exist_on_type_1, ts.declarationNameToString(propNode), typeToString(subtype));
-                            break;
+            var duplicateFunctionDeclaration = false;
+            var multipleConstructorImplementation = false;
+            for (var _i = 0, declarations_5 = declarations; _i < declarations_5.length; _i++) {
+                var current = declarations_5[_i];
+                var node = current;
+                var inAmbientContext = ts.isInAmbientContext(node);
+                var inAmbientContextOrInterface = node.parent.kind === 230 /* InterfaceDeclaration */ || node.parent.kind === 163 /* TypeLiteral */ || inAmbientContext;
+                if (inAmbientContextOrInterface) {
+                    // check if declarations are consecutive only if they are non-ambient
+                    // 1. ambient declarations can be interleaved
+                    // i.e. this is legal
+                    //     declare function foo();
+                    //     declare function bar();
+                    //     declare function foo();
+                    // 2. mixing ambient and non-ambient declarations is a separate error that will be reported - do not want to report an extra one
+                    previousDeclaration = undefined;
+                }
+                if (node.kind === 228 /* FunctionDeclaration */ || node.kind === 151 /* MethodDeclaration */ || node.kind === 150 /* MethodSignature */ || node.kind === 152 /* Constructor */) {
+                    var currentNodeFlags = getEffectiveDeclarationFlags(node, flagsToCheck);
+                    someNodeFlags |= currentNodeFlags;
+                    allNodeFlags &= currentNodeFlags;
+                    someHaveQuestionToken = someHaveQuestionToken || ts.hasQuestionToken(node);
+                    allHaveQuestionToken = allHaveQuestionToken && ts.hasQuestionToken(node);
+                    if (ts.nodeIsPresent(node.body) && bodyDeclaration) {
+                        if (isConstructor) {
+                            multipleConstructorImplementation = true;
+                        }
+                        else {
+                            duplicateFunctionDeclaration = true;
+                        }
+                    }
+                    else if (previousDeclaration && previousDeclaration.parent === node.parent && previousDeclaration.end !== node.pos) {
+                        reportImplementationExpectedError(previousDeclaration);
+                    }
+                    if (ts.nodeIsPresent(node.body)) {
+                        if (!bodyDeclaration) {
+                            bodyDeclaration = node;
                         }
                     }
+                    else {
+                        hasOverloads = true;
+                    }
+                    previousDeclaration = node;
+                    if (!inAmbientContextOrInterface) {
+                        lastSeenNonAmbientDeclaration = node;
+                    }
                 }
-                errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.Property_0_does_not_exist_on_type_1, ts.declarationNameToString(propNode), typeToString(containingType));
-                diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(propNode, errorInfo));
             }
-        }
-        function isValidPropertyAccess(node, propertyName) {
-            var left = node.kind === 172 /* PropertyAccessExpression */
-                ? node.expression
-                : node.left;
-            var type = checkExpression(left);
-            if (type !== unknownType && !isTypeAny(type)) {
-                var prop = getPropertyOfType(getWidenedType(type), propertyName);
-                if (prop && prop.parent && prop.parent.flags & 32 /* Class */) {
-                    return checkClassPropertyAccess(node, left, type, prop);
-                }
+            if (multipleConstructorImplementation) {
+                ts.forEach(declarations, function (declaration) {
+                    error(declaration, ts.Diagnostics.Multiple_constructor_implementations_are_not_allowed);
+                });
             }
-            return true;
-        }
-        /**
-         * Return the symbol of the for-in variable declared or referenced by the given for-in statement.
-         */
-        function getForInVariableSymbol(node) {
-            var initializer = node.initializer;
-            if (initializer.kind === 219 /* VariableDeclarationList */) {
-                var variable = initializer.declarations[0];
-                if (variable && !ts.isBindingPattern(variable.name)) {
-                    return getSymbolOfNode(variable);
-                }
+            if (duplicateFunctionDeclaration) {
+                ts.forEach(declarations, function (declaration) {
+                    error(ts.getNameOfDeclaration(declaration), ts.Diagnostics.Duplicate_function_implementation);
+                });
             }
-            else if (initializer.kind === 69 /* Identifier */) {
-                return getResolvedSymbol(initializer);
+            // Abstract methods can't have an implementation -- in particular, they don't need one.
+            if (lastSeenNonAmbientDeclaration && !lastSeenNonAmbientDeclaration.body &&
+                !(ts.getModifierFlags(lastSeenNonAmbientDeclaration) & 128 /* Abstract */) && !lastSeenNonAmbientDeclaration.questionToken) {
+                reportImplementationExpectedError(lastSeenNonAmbientDeclaration);
             }
-            return undefined;
-        }
-        /**
-         * Return true if the given type is considered to have numeric property names.
-         */
-        function hasNumericPropertyNames(type) {
-            return getIndexTypeOfType(type, 1 /* Number */) && !getIndexTypeOfType(type, 0 /* String */);
-        }
-        /**
-         * Return true if given node is an expression consisting of an identifier (possibly parenthesized)
-         * that references a for-in variable for an object with numeric property names.
-         */
-        function isForInVariableForNumericPropertyNames(expr) {
-            var e = skipParenthesizedNodes(expr);
-            if (e.kind === 69 /* Identifier */) {
-                var symbol = getResolvedSymbol(e);
-                if (symbol.flags & 3 /* Variable */) {
-                    var child = expr;
-                    var node = expr.parent;
-                    while (node) {
-                        if (node.kind === 207 /* ForInStatement */ &&
-                            child === node.statement &&
-                            getForInVariableSymbol(node) === symbol &&
-                            hasNumericPropertyNames(checkExpression(node.expression))) {
-                            return true;
+            if (hasOverloads) {
+                checkFlagAgreementBetweenOverloads(declarations, bodyDeclaration, flagsToCheck, someNodeFlags, allNodeFlags);
+                checkQuestionTokenAgreementBetweenOverloads(declarations, bodyDeclaration, someHaveQuestionToken, allHaveQuestionToken);
+                if (bodyDeclaration) {
+                    var signatures = getSignaturesOfSymbol(symbol);
+                    var bodySignature = getSignatureFromDeclaration(bodyDeclaration);
+                    for (var _a = 0, signatures_7 = signatures; _a < signatures_7.length; _a++) {
+                        var signature = signatures_7[_a];
+                        if (!isImplementationCompatibleWithOverload(bodySignature, signature)) {
+                            error(signature.declaration, ts.Diagnostics.Overload_signature_is_not_compatible_with_function_implementation);
+                            break;
                         }
-                        child = node;
-                        node = node.parent;
                     }
                 }
             }
-            return false;
         }
-        function checkIndexedAccess(node) {
-            // Grammar checking
-            if (!node.argumentExpression) {
-                var sourceFile = ts.getSourceFileOfNode(node);
-                if (node.parent.kind === 175 /* NewExpression */ && node.parent.expression === node) {
-                    var start = ts.skipTrivia(sourceFile.text, node.expression.end);
-                    var end = node.end;
-                    grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead);
-                }
-                else {
-                    var start = node.end - "]".length;
-                    var end = node.end;
-                    grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.Expression_expected);
-                }
+        function checkExportsOnMergedDeclarations(node) {
+            if (!produceDiagnostics) {
+                return;
             }
-            // Obtain base constraint such that we can bail out if the constraint is an unknown type
-            var objectType = getApparentType(checkNonNullExpression(node.expression));
-            var indexType = node.argumentExpression ? checkExpression(node.argumentExpression) : unknownType;
-            if (objectType === unknownType || objectType === silentNeverType) {
-                return objectType;
+            // if localSymbol is defined on node then node itself is exported - check is required
+            var symbol = node.localSymbol;
+            if (!symbol) {
+                // local symbol is undefined => this declaration is non-exported.
+                // however symbol might contain other declarations that are exported
+                symbol = getSymbolOfNode(node);
+                if (!(symbol.flags & 7340032 /* Export */)) {
+                    // this is a pure local symbol (all declarations are non-exported) - no need to check anything
+                    return;
+                }
             }
-            var isConstEnum = isConstEnumObjectType(objectType);
-            if (isConstEnum &&
-                (!node.argumentExpression || node.argumentExpression.kind !== 9 /* StringLiteral */)) {
-                error(node.argumentExpression, ts.Diagnostics.A_const_enum_member_can_only_be_accessed_using_a_string_literal);
-                return unknownType;
+            // run the check only for the first declaration in the list
+            if (ts.getDeclarationOfKind(symbol, node.kind) !== node) {
+                return;
             }
-            // TypeScript 1.0 spec (April 2014): 4.10 Property Access
-            // - If IndexExpr is a string literal or a numeric literal and ObjExpr's apparent type has a property with the name
-            //    given by that literal(converted to its string representation in the case of a numeric literal), the property access is of the type of that property.
-            // - Otherwise, if ObjExpr's apparent type has a numeric index signature and IndexExpr is of type Any, the Number primitive type, or an enum type,
-            //    the property access is of the type of that index signature.
-            // - Otherwise, if ObjExpr's apparent type has a string index signature and IndexExpr is of type Any, the String or Number primitive type, or an enum type,
-            //    the property access is of the type of that index signature.
-            // - Otherwise, if IndexExpr is of type Any, the String or Number primitive type, or an enum type, the property access is of type Any.
-            // See if we can index as a property.
-            if (node.argumentExpression) {
-                var name_16 = getPropertyNameForIndexedAccess(node.argumentExpression, indexType);
-                if (name_16 !== undefined) {
-                    var prop = getPropertyOfType(objectType, name_16);
-                    if (prop) {
-                        getNodeLinks(node).resolvedSymbol = prop;
-                        return getTypeOfSymbol(prop);
-                    }
-                    else if (isConstEnum) {
-                        error(node.argumentExpression, ts.Diagnostics.Property_0_does_not_exist_on_const_enum_1, name_16, symbolToString(objectType.symbol));
-                        return unknownType;
+            // we use SymbolFlags.ExportValue, SymbolFlags.ExportType and SymbolFlags.ExportNamespace
+            // to denote disjoint declarationSpaces (without making new enum type).
+            var exportedDeclarationSpaces = 0 /* None */;
+            var nonExportedDeclarationSpaces = 0 /* None */;
+            var defaultExportedDeclarationSpaces = 0 /* None */;
+            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                var d = _a[_i];
+                var declarationSpaces = getDeclarationSpaces(d);
+                var effectiveDeclarationFlags = getEffectiveDeclarationFlags(d, 1 /* Export */ | 512 /* Default */);
+                if (effectiveDeclarationFlags & 1 /* Export */) {
+                    if (effectiveDeclarationFlags & 512 /* Default */) {
+                        defaultExportedDeclarationSpaces |= declarationSpaces;
                     }
+                    else {
+                        exportedDeclarationSpaces |= declarationSpaces;
+                    }
+                }
+                else {
+                    nonExportedDeclarationSpaces |= declarationSpaces;
                 }
             }
-            // Check for compatible indexer types.
-            var allowedNullableFlags = strictNullChecks ? 0 : 6144 /* Nullable */;
-            if (isTypeAnyOrAllConstituentTypesHaveKind(indexType, 34 /* StringLike */ | 340 /* NumberLike */ | 512 /* ESSymbol */ | allowedNullableFlags)) {
-                // Try to use a number indexer.
-                if (isTypeAnyOrAllConstituentTypesHaveKind(indexType, 340 /* NumberLike */ | allowedNullableFlags) || isForInVariableForNumericPropertyNames(node.argumentExpression)) {
-                    var numberIndexInfo = getIndexInfoOfType(objectType, 1 /* Number */);
-                    if (numberIndexInfo) {
-                        getNodeLinks(node).resolvedIndexInfo = numberIndexInfo;
-                        return numberIndexInfo.type;
+            // Spaces for anything not declared a 'default export'.
+            var nonDefaultExportedDeclarationSpaces = exportedDeclarationSpaces | nonExportedDeclarationSpaces;
+            var commonDeclarationSpacesForExportsAndLocals = exportedDeclarationSpaces & nonExportedDeclarationSpaces;
+            var commonDeclarationSpacesForDefaultAndNonDefault = defaultExportedDeclarationSpaces & nonDefaultExportedDeclarationSpaces;
+            if (commonDeclarationSpacesForExportsAndLocals || commonDeclarationSpacesForDefaultAndNonDefault) {
+                // declaration spaces for exported and non-exported declarations intersect
+                for (var _b = 0, _c = symbol.declarations; _b < _c.length; _b++) {
+                    var d = _c[_b];
+                    var declarationSpaces = getDeclarationSpaces(d);
+                    var name_26 = ts.getNameOfDeclaration(d);
+                    // Only error on the declarations that contributed to the intersecting spaces.
+                    if (declarationSpaces & commonDeclarationSpacesForDefaultAndNonDefault) {
+                        error(name_26, ts.Diagnostics.Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead, ts.declarationNameToString(name_26));
+                    }
+                    else if (declarationSpaces & commonDeclarationSpacesForExportsAndLocals) {
+                        error(name_26, ts.Diagnostics.Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local, ts.declarationNameToString(name_26));
                     }
                 }
-                // Try to use string indexing.
-                var stringIndexInfo = getIndexInfoOfType(objectType, 0 /* String */);
-                if (stringIndexInfo) {
-                    getNodeLinks(node).resolvedIndexInfo = stringIndexInfo;
-                    return stringIndexInfo.type;
-                }
-                // Fall back to any.
-                if (compilerOptions.noImplicitAny && !compilerOptions.suppressImplicitAnyIndexErrors && !isTypeAny(objectType)) {
-                    error(node, getIndexTypeOfType(objectType, 1 /* Number */) ?
-                        ts.Diagnostics.Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number :
-                        ts.Diagnostics.Index_signature_of_object_type_implicitly_has_an_any_type);
+            }
+            function getDeclarationSpaces(d) {
+                switch (d.kind) {
+                    case 230 /* InterfaceDeclaration */:
+                        return 2097152 /* ExportType */;
+                    case 233 /* ModuleDeclaration */:
+                        return ts.isAmbientModule(d) || ts.getModuleInstanceState(d) !== 0 /* NonInstantiated */
+                            ? 4194304 /* ExportNamespace */ | 1048576 /* ExportValue */
+                            : 4194304 /* ExportNamespace */;
+                    case 229 /* ClassDeclaration */:
+                    case 232 /* EnumDeclaration */:
+                        return 2097152 /* ExportType */ | 1048576 /* ExportValue */;
+                    case 237 /* ImportEqualsDeclaration */:
+                        var result_3 = 0;
+                        var target = resolveAlias(getSymbolOfNode(d));
+                        ts.forEach(target.declarations, function (d) { result_3 |= getDeclarationSpaces(d); });
+                        return result_3;
+                    default:
+                        return 1048576 /* ExportValue */;
                 }
-                return anyType;
             }
-            // REVIEW: Users should know the type that was actually used.
-            error(node, ts.Diagnostics.An_index_expression_argument_must_be_of_type_string_number_symbol_or_any);
-            return unknownType;
+        }
+        function getAwaitedTypeOfPromise(type, errorNode, diagnosticMessage) {
+            var promisedType = getPromisedTypeOfPromise(type, errorNode);
+            return promisedType && getAwaitedType(promisedType, errorNode, diagnosticMessage);
         }
         /**
-         * If indexArgumentExpression is a string literal or number literal, returns its text.
-         * If indexArgumentExpression is a constant value, returns its string value.
-         * If indexArgumentExpression is a well known symbol, returns the property name corresponding
-         *    to this symbol, as long as it is a proper symbol reference.
-         * Otherwise, returns undefined.
+         * Gets the "promised type" of a promise.
+         * @param type The type of the promise.
+         * @remarks The "promised type" of a type is the type of the "value" parameter of the "onfulfilled" callback.
          */
-        function getPropertyNameForIndexedAccess(indexArgumentExpression, indexArgumentType) {
-            if (indexArgumentExpression.kind === 9 /* StringLiteral */ || indexArgumentExpression.kind === 8 /* NumericLiteral */) {
-                return indexArgumentExpression.text;
-            }
-            if (indexArgumentExpression.kind === 173 /* ElementAccessExpression */ || indexArgumentExpression.kind === 172 /* PropertyAccessExpression */) {
-                var value = getConstantValue(indexArgumentExpression);
-                if (value !== undefined) {
-                    return value.toString();
-                }
+        function getPromisedTypeOfPromise(promise, errorNode) {
+            //
+            //  { // promise
+            //      then( // thenFunction
+            //          onfulfilled: ( // onfulfilledParameterType
+            //              value: T // valueParameterType
+            //          ) => any
+            //      ): any;
+            //  }
+            //
+            if (isTypeAny(promise)) {
+                return undefined;
             }
-            if (checkThatExpressionIsProperSymbolReference(indexArgumentExpression, indexArgumentType, /*reportError*/ false)) {
-                var rightHandSideName = indexArgumentExpression.name.text;
-                return ts.getPropertyNameForKnownSymbolName(rightHandSideName);
+            var typeAsPromise = promise;
+            if (typeAsPromise.promisedTypeOfPromise) {
+                return typeAsPromise.promisedTypeOfPromise;
             }
-            return undefined;
-        }
-        /**
-         * A proper symbol reference requires the following:
-         *   1. The property access denotes a property that exists
-         *   2. The expression is of the form Symbol.<identifier>
-         *   3. The property access is of the primitive type symbol.
-         *   4. Symbol in this context resolves to the global Symbol object
-         */
-        function checkThatExpressionIsProperSymbolReference(expression, expressionType, reportError) {
-            if (expressionType === unknownType) {
-                // There is already an error, so no need to report one.
-                return false;
+            if (isReferenceToType(promise, getGlobalPromiseType(/*reportErrors*/ false))) {
+                return typeAsPromise.promisedTypeOfPromise = promise.typeArguments[0];
             }
-            if (!ts.isWellKnownSymbolSyntactically(expression)) {
-                return false;
+            var thenFunction = getTypeOfPropertyOfType(promise, "then");
+            if (isTypeAny(thenFunction)) {
+                return undefined;
             }
-            // Make sure the property type is the primitive symbol type
-            if ((expressionType.flags & 512 /* ESSymbol */) === 0) {
-                if (reportError) {
-                    error(expression, ts.Diagnostics.A_computed_property_name_of_the_form_0_must_be_of_type_symbol, ts.getTextOfNode(expression));
+            var thenSignatures = thenFunction ? getSignaturesOfType(thenFunction, 0 /* Call */) : emptyArray;
+            if (thenSignatures.length === 0) {
+                if (errorNode) {
+                    error(errorNode, ts.Diagnostics.A_promise_must_have_a_then_method);
                 }
-                return false;
-            }
-            // The name is Symbol.<someName>, so make sure Symbol actually resolves to the
-            // global Symbol object
-            var leftHandSide = expression.expression;
-            var leftHandSideSymbol = getResolvedSymbol(leftHandSide);
-            if (!leftHandSideSymbol) {
-                return false;
+                return undefined;
             }
-            var globalESSymbol = getGlobalESSymbolConstructorSymbol();
-            if (!globalESSymbol) {
-                // Already errored when we tried to look up the symbol
-                return false;
+            var onfulfilledParameterType = getTypeWithFacts(getUnionType(ts.map(thenSignatures, getTypeOfFirstParameterOfSignature)), 524288 /* NEUndefinedOrNull */);
+            if (isTypeAny(onfulfilledParameterType)) {
+                return undefined;
             }
-            if (leftHandSideSymbol !== globalESSymbol) {
-                if (reportError) {
-                    error(leftHandSide, ts.Diagnostics.Symbol_reference_does_not_refer_to_the_global_Symbol_constructor_object);
+            var onfulfilledParameterSignatures = getSignaturesOfType(onfulfilledParameterType, 0 /* Call */);
+            if (onfulfilledParameterSignatures.length === 0) {
+                if (errorNode) {
+                    error(errorNode, ts.Diagnostics.The_first_parameter_of_the_then_method_of_a_promise_must_be_a_callback);
                 }
-                return false;
+                return undefined;
             }
-            return true;
+            return typeAsPromise.promisedTypeOfPromise = getUnionType(ts.map(onfulfilledParameterSignatures, getTypeOfFirstParameterOfSignature), /*subtypeReduction*/ true);
         }
-        function resolveUntypedCall(node) {
-            if (node.kind === 176 /* TaggedTemplateExpression */) {
-                checkExpression(node.template);
+        /**
+         * Gets the "awaited type" of a type.
+         * @param type The type to await.
+         * @remarks The "awaited type" of an expression is its "promised type" if the expression is a
+         * Promise-like type; otherwise, it is the type of the expression. This is used to reflect
+         * The runtime behavior of the `await` keyword.
+         */
+        function checkAwaitedType(type, errorNode, diagnosticMessage) {
+            return getAwaitedType(type, errorNode, diagnosticMessage) || unknownType;
+        }
+        function getAwaitedType(type, errorNode, diagnosticMessage) {
+            var typeAsAwaitable = type;
+            if (typeAsAwaitable.awaitedTypeOfType) {
+                return typeAsAwaitable.awaitedTypeOfType;
             }
-            else if (node.kind !== 143 /* Decorator */) {
-                ts.forEach(node.arguments, function (argument) {
-                    checkExpression(argument);
-                });
+            if (isTypeAny(type)) {
+                return typeAsAwaitable.awaitedTypeOfType = type;
             }
-            return anySignature;
-        }
-        function resolveErrorCall(node) {
-            resolveUntypedCall(node);
-            return unknownSignature;
-        }
-        // Re-order candidate signatures into the result array. Assumes the result array to be empty.
-        // The candidate list orders groups in reverse, but within a group signatures are kept in declaration order
-        // A nit here is that we reorder only signatures that belong to the same symbol,
-        // so order how inherited signatures are processed is still preserved.
-        // interface A { (x: string): void }
-        // interface B extends A { (x: 'foo'): string }
-        // const b: B;
-        // b('foo') // <- here overloads should be processed as [(x:'foo'): string, (x: string): void]
-        function reorderCandidates(signatures, result) {
-            var lastParent;
-            var lastSymbol;
-            var cutoffIndex = 0;
-            var index;
-            var specializedIndex = -1;
-            var spliceIndex;
-            ts.Debug.assert(!result.length);
-            for (var _i = 0, signatures_2 = signatures; _i < signatures_2.length; _i++) {
-                var signature = signatures_2[_i];
-                var symbol = signature.declaration && getSymbolOfNode(signature.declaration);
-                var parent_11 = signature.declaration && signature.declaration.parent;
-                if (!lastSymbol || symbol === lastSymbol) {
-                    if (lastParent && parent_11 === lastParent) {
-                        index++;
-                    }
-                    else {
-                        lastParent = parent_11;
-                        index = cutoffIndex;
-                    }
+            if (type.flags & 65536 /* Union */) {
+                var types = void 0;
+                for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                    var constituentType = _a[_i];
+                    types = ts.append(types, getAwaitedType(constituentType, errorNode, diagnosticMessage));
                 }
-                else {
-                    // current declaration belongs to a different symbol
-                    // set cutoffIndex so re-orderings in the future won't change result set from 0 to cutoffIndex
-                    index = cutoffIndex = result.length;
-                    lastParent = parent_11;
+                if (!types) {
+                    return undefined;
                 }
-                lastSymbol = symbol;
-                // specialized signatures always need to be placed before non-specialized signatures regardless
-                // of the cutoff position; see GH#1133
-                if (signature.hasLiteralTypes) {
-                    specializedIndex++;
-                    spliceIndex = specializedIndex;
-                    // The cutoff index always needs to be greater than or equal to the specialized signature index
-                    // in order to prevent non-specialized signatures from being added before a specialized
-                    // signature.
-                    cutoffIndex++;
+                return typeAsAwaitable.awaitedTypeOfType = getUnionType(types, /*subtypeReduction*/ true);
+            }
+            var promisedType = getPromisedTypeOfPromise(type);
+            if (promisedType) {
+                if (type.id === promisedType.id || ts.indexOf(awaitedTypeStack, promisedType.id) >= 0) {
+                    // Verify that we don't have a bad actor in the form of a promise whose
+                    // promised type is the same as the promise type, or a mutually recursive
+                    // promise. If so, we return undefined as we cannot guess the shape. If this
+                    // were the actual case in the JavaScript, this Promise would never resolve.
+                    //
+                    // An example of a bad actor with a singly-recursive promise type might
+                    // be:
+                    //
+                    //  interface BadPromise {
+                    //      then(
+                    //          onfulfilled: (value: BadPromise) => any,
+                    //          onrejected: (error: any) => any): BadPromise;
+                    //  }
+                    // The above interface will pass the PromiseLike check, and return a
+                    // promised type of `BadPromise`. Since this is a self reference, we
+                    // don't want to keep recursing ad infinitum.
+                    //
+                    // An example of a bad actor in the form of a mutually-recursive
+                    // promise type might be:
+                    //
+                    //  interface BadPromiseA {
+                    //      then(
+                    //          onfulfilled: (value: BadPromiseB) => any,
+                    //          onrejected: (error: any) => any): BadPromiseB;
+                    //  }
+                    //
+                    //  interface BadPromiseB {
+                    //      then(
+                    //          onfulfilled: (value: BadPromiseA) => any,
+                    //          onrejected: (error: any) => any): BadPromiseA;
+                    //  }
+                    //
+                    if (errorNode) {
+                        error(errorNode, ts.Diagnostics.Type_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method);
+                    }
+                    return undefined;
                 }
-                else {
-                    spliceIndex = index;
+                // Keep track of the type we're about to unwrap to avoid bad recursive promise types.
+                // See the comments above for more information.
+                awaitedTypeStack.push(type.id);
+                var awaitedType = getAwaitedType(promisedType, errorNode, diagnosticMessage);
+                awaitedTypeStack.pop();
+                if (!awaitedType) {
+                    return undefined;
                 }
-                result.splice(spliceIndex, 0, signature);
+                return typeAsAwaitable.awaitedTypeOfType = awaitedType;
             }
-        }
-        function getSpreadArgumentIndex(args) {
-            for (var i = 0; i < args.length; i++) {
-                var arg = args[i];
-                if (arg && arg.kind === 191 /* SpreadElementExpression */) {
-                    return i;
+            // The type was not a promise, so it could not be unwrapped any further.
+            // As long as the type does not have a callable "then" property, it is
+            // safe to return the type; otherwise, an error will be reported in
+            // the call to getNonThenableType and we will return undefined.
+            //
+            // An example of a non-promise "thenable" might be:
+            //
+            //  await { then(): void {} }
+            //
+            // The "thenable" does not match the minimal definition for a promise. When
+            // a Promise/A+-compatible or ES6 promise tries to adopt this value, the promise
+            // will never settle. We treat this as an error to help flag an early indicator
+            // of a runtime problem. If the user wants to return this value from an async
+            // function, they would need to wrap it in some other value. If they want it to
+            // be treated as a promise, they can cast to <any>.
+            var thenFunction = getTypeOfPropertyOfType(type, "then");
+            if (thenFunction && getSignaturesOfType(thenFunction, 0 /* Call */).length > 0) {
+                if (errorNode) {
+                    ts.Debug.assert(!!diagnosticMessage);
+                    error(errorNode, diagnosticMessage);
                 }
+                return undefined;
             }
-            return -1;
+            return typeAsAwaitable.awaitedTypeOfType = type;
         }
-        function hasCorrectArity(node, args, signature, signatureHelpTrailingComma) {
-            if (signatureHelpTrailingComma === void 0) { signatureHelpTrailingComma = false; }
-            var argCount; // Apparent number of arguments we will have in this call
-            var typeArguments; // Type arguments (undefined if none)
-            var callIsIncomplete; // In incomplete call we want to be lenient when we have too few arguments
-            var isDecorator;
-            var spreadArgIndex = -1;
-            if (node.kind === 176 /* TaggedTemplateExpression */) {
-                var tagExpression = node;
-                // Even if the call is incomplete, we'll have a missing expression as our last argument,
-                // so we can say the count is just the arg list length
-                argCount = args.length;
-                typeArguments = undefined;
-                if (tagExpression.template.kind === 189 /* TemplateExpression */) {
-                    // If a tagged template expression lacks a tail literal, the call is incomplete.
-                    // Specifically, a template only can end in a TemplateTail or a Missing literal.
-                    var templateExpression = tagExpression.template;
-                    var lastSpan = ts.lastOrUndefined(templateExpression.templateSpans);
-                    ts.Debug.assert(lastSpan !== undefined); // we should always have at least one span.
-                    callIsIncomplete = ts.nodeIsMissing(lastSpan.literal) || !!lastSpan.literal.isUnterminated;
+        /**
+         * Checks the return type of an async function to ensure it is a compatible
+         * Promise implementation.
+         *
+         * This checks that an async function has a valid Promise-compatible return type,
+         * and returns the *awaited type* of the promise. An async function has a valid
+         * Promise-compatible return type if the resolved value of the return type has a
+         * construct signature that takes in an `initializer` function that in turn supplies
+         * a `resolve` function as one of its arguments and results in an object with a
+         * callable `then` signature.
+         *
+         * @param node The signature to check
+         */
+        function checkAsyncFunctionReturnType(node) {
+            // As part of our emit for an async function, we will need to emit the entity name of
+            // the return type annotation as an expression. To meet the necessary runtime semantics
+            // for __awaiter, we must also check that the type of the declaration (e.g. the static
+            // side or "constructor" of the promise type) is compatible `PromiseConstructorLike`.
+            //
+            // An example might be (from lib.es6.d.ts):
+            //
+            //  interface Promise<T> { ... }
+            //  interface PromiseConstructor {
+            //      new <T>(...): Promise<T>;
+            //  }
+            //  declare var Promise: PromiseConstructor;
+            //
+            // When an async function declares a return type annotation of `Promise<T>`, we
+            // need to get the type of the `Promise` variable declaration above, which would
+            // be `PromiseConstructor`.
+            //
+            // The same case applies to a class:
+            //
+            //  declare class Promise<T> {
+            //      constructor(...);
+            //      then<U>(...): Promise<U>;
+            //  }
+            //
+            var returnTypeNode = ts.getEffectiveReturnTypeNode(node);
+            var returnType = getTypeFromTypeNode(returnTypeNode);
+            if (languageVersion >= 2 /* ES2015 */) {
+                if (returnType === unknownType) {
+                    return unknownType;
                 }
-                else {
-                    // If the template didn't end in a backtick, or its beginning occurred right prior to EOF,
-                    // then this might actually turn out to be a TemplateHead in the future;
-                    // so we consider the call to be incomplete.
-                    var templateLiteral = tagExpression.template;
-                    ts.Debug.assert(templateLiteral.kind === 11 /* NoSubstitutionTemplateLiteral */);
-                    callIsIncomplete = !!templateLiteral.isUnterminated;
+                var globalPromiseType = getGlobalPromiseType(/*reportErrors*/ true);
+                if (globalPromiseType !== emptyGenericType && !isReferenceToType(returnType, globalPromiseType)) {
+                    // The promise type was not a valid type reference to the global promise type, so we
+                    // report an error and return the unknown type.
+                    error(returnTypeNode, ts.Diagnostics.The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type);
+                    return unknownType;
                 }
             }
-            else if (node.kind === 143 /* Decorator */) {
-                isDecorator = true;
-                typeArguments = undefined;
-                argCount = getEffectiveArgumentCount(node, /*args*/ undefined, signature);
-            }
             else {
-                var callExpression = node;
-                if (!callExpression.arguments) {
-                    // This only happens when we have something of the form: 'new C'
-                    ts.Debug.assert(callExpression.kind === 175 /* NewExpression */);
-                    return signature.minArgumentCount === 0;
+                // Always mark the type node as referenced if it points to a value
+                markTypeNodeAsReferenced(returnTypeNode);
+                if (returnType === unknownType) {
+                    return unknownType;
+                }
+                var promiseConstructorName = ts.getEntityNameFromTypeNode(returnTypeNode);
+                if (promiseConstructorName === undefined) {
+                    error(returnTypeNode, ts.Diagnostics.Type_0_is_not_a_valid_async_function_return_type_in_ES5_SlashES3_because_it_does_not_refer_to_a_Promise_compatible_constructor_value, typeToString(returnType));
+                    return unknownType;
+                }
+                var promiseConstructorSymbol = resolveEntityName(promiseConstructorName, 107455 /* Value */, /*ignoreErrors*/ true);
+                var promiseConstructorType = promiseConstructorSymbol ? getTypeOfSymbol(promiseConstructorSymbol) : unknownType;
+                if (promiseConstructorType === unknownType) {
+                    if (promiseConstructorName.kind === 71 /* Identifier */ && promiseConstructorName.text === "Promise" && getTargetType(returnType) === getGlobalPromiseType(/*reportErrors*/ false)) {
+                        error(returnTypeNode, ts.Diagnostics.An_async_function_or_method_in_ES5_SlashES3_requires_the_Promise_constructor_Make_sure_you_have_a_declaration_for_the_Promise_constructor_or_include_ES2015_in_your_lib_option);
+                    }
+                    else {
+                        error(returnTypeNode, ts.Diagnostics.Type_0_is_not_a_valid_async_function_return_type_in_ES5_SlashES3_because_it_does_not_refer_to_a_Promise_compatible_constructor_value, ts.entityNameToString(promiseConstructorName));
+                    }
+                    return unknownType;
+                }
+                var globalPromiseConstructorLikeType = getGlobalPromiseConstructorLikeType(/*reportErrors*/ true);
+                if (globalPromiseConstructorLikeType === emptyObjectType) {
+                    // If we couldn't resolve the global PromiseConstructorLike type we cannot verify
+                    // compatibility with __awaiter.
+                    error(returnTypeNode, ts.Diagnostics.Type_0_is_not_a_valid_async_function_return_type_in_ES5_SlashES3_because_it_does_not_refer_to_a_Promise_compatible_constructor_value, ts.entityNameToString(promiseConstructorName));
+                    return unknownType;
+                }
+                if (!checkTypeAssignableTo(promiseConstructorType, globalPromiseConstructorLikeType, returnTypeNode, ts.Diagnostics.Type_0_is_not_a_valid_async_function_return_type_in_ES5_SlashES3_because_it_does_not_refer_to_a_Promise_compatible_constructor_value)) {
+                    return unknownType;
+                }
+                // Verify there is no local declaration that could collide with the promise constructor.
+                var rootName = promiseConstructorName && getFirstIdentifier(promiseConstructorName);
+                var collidingSymbol = getSymbol(node.locals, rootName.text, 107455 /* Value */);
+                if (collidingSymbol) {
+                    error(collidingSymbol.valueDeclaration, ts.Diagnostics.Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions, rootName.text, ts.entityNameToString(promiseConstructorName));
+                    return unknownType;
                 }
-                argCount = signatureHelpTrailingComma ? args.length + 1 : args.length;
-                // If we are missing the close paren, the call is incomplete.
-                callIsIncomplete = callExpression.arguments.end === callExpression.end;
-                typeArguments = callExpression.typeArguments;
-                spreadArgIndex = getSpreadArgumentIndex(args);
             }
-            // If the user supplied type arguments, but the number of type arguments does not match
-            // the declared number of type parameters, the call has an incorrect arity.
-            var hasRightNumberOfTypeArgs = !typeArguments ||
-                (signature.typeParameters && typeArguments.length === signature.typeParameters.length);
-            if (!hasRightNumberOfTypeArgs) {
-                return false;
+            // Get and return the awaited type of the return type.
+            return checkAwaitedType(returnType, node, ts.Diagnostics.The_return_type_of_an_async_function_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member);
+        }
+        /** Check a decorator */
+        function checkDecorator(node) {
+            var signature = getResolvedSignature(node);
+            var returnType = getReturnTypeOfSignature(signature);
+            if (returnType.flags & 1 /* Any */) {
+                return;
             }
-            // If spread arguments are present, check that they correspond to a rest parameter. If so, no
-            // further checking is necessary.
-            if (spreadArgIndex >= 0) {
-                return isRestParameterIndex(signature, spreadArgIndex);
+            var expectedReturnType;
+            var headMessage = getDiagnosticHeadMessageForDecoratorResolution(node);
+            var errorInfo;
+            switch (node.parent.kind) {
+                case 229 /* ClassDeclaration */:
+                    var classSymbol = getSymbolOfNode(node.parent);
+                    var classConstructorType = getTypeOfSymbol(classSymbol);
+                    expectedReturnType = getUnionType([classConstructorType, voidType]);
+                    break;
+                case 146 /* Parameter */:
+                    expectedReturnType = voidType;
+                    errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any);
+                    break;
+                case 149 /* PropertyDeclaration */:
+                    expectedReturnType = voidType;
+                    errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.The_return_type_of_a_property_decorator_function_must_be_either_void_or_any);
+                    break;
+                case 151 /* MethodDeclaration */:
+                case 153 /* GetAccessor */:
+                case 154 /* SetAccessor */:
+                    var methodType = getTypeOfNode(node.parent);
+                    var descriptorType = createTypedPropertyDescriptorType(methodType);
+                    expectedReturnType = getUnionType([descriptorType, voidType]);
+                    break;
             }
-            // Too many arguments implies incorrect arity.
-            if (!signature.hasRestParameter && argCount > signature.parameters.length) {
-                return false;
+            checkTypeAssignableTo(returnType, expectedReturnType, node, headMessage, errorInfo);
+        }
+        /**
+         * If a TypeNode can be resolved to a value symbol imported from an external module, it is
+         * marked as referenced to prevent import elision.
+         */
+        function markTypeNodeAsReferenced(node) {
+            markEntityNameOrEntityExpressionAsReference(node && ts.getEntityNameFromTypeNode(node));
+        }
+        function markEntityNameOrEntityExpressionAsReference(typeName) {
+            var rootName = typeName && getFirstIdentifier(typeName);
+            var rootSymbol = rootName && resolveName(rootName, rootName.text, (typeName.kind === 71 /* Identifier */ ? 793064 /* Type */ : 1920 /* Namespace */) | 8388608 /* Alias */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined);
+            if (rootSymbol
+                && rootSymbol.flags & 8388608 /* Alias */
+                && symbolIsValue(rootSymbol)
+                && !isConstEnumOrConstEnumOnlyModule(resolveAlias(rootSymbol))) {
+                markAliasSymbolAsReferenced(rootSymbol);
             }
-            // If the call is incomplete, we should skip the lower bound check.
-            var hasEnoughArguments = argCount >= signature.minArgumentCount;
-            return callIsIncomplete || hasEnoughArguments;
         }
-        // If type has a single call signature and no other members, return that signature. Otherwise, return undefined.
-        function getSingleCallSignature(type) {
-            if (type.flags & 2588672 /* ObjectType */) {
-                var resolved = resolveStructuredTypeMembers(type);
-                if (resolved.callSignatures.length === 1 && resolved.constructSignatures.length === 0 &&
-                    resolved.properties.length === 0 && !resolved.stringIndexInfo && !resolved.numberIndexInfo) {
-                    return resolved.callSignatures[0];
+        /**
+         * This function marks the type used for metadata decorator as referenced if it is import
+         * from external module.
+         * This is different from markTypeNodeAsReferenced because it tries to simplify type nodes in
+         * union and intersection type
+         * @param node
+         */
+        function markDecoratorMedataDataTypeNodeAsReferenced(node) {
+            var entityName = getEntityNameForDecoratorMetadata(node);
+            if (entityName && ts.isEntityName(entityName)) {
+                markEntityNameOrEntityExpressionAsReference(entityName);
+            }
+        }
+        function getEntityNameForDecoratorMetadata(node) {
+            if (node) {
+                switch (node.kind) {
+                    case 167 /* IntersectionType */:
+                    case 166 /* UnionType */:
+                        var commonEntityName = void 0;
+                        for (var _i = 0, _a = node.types; _i < _a.length; _i++) {
+                            var typeNode = _a[_i];
+                            var individualEntityName = getEntityNameForDecoratorMetadata(typeNode);
+                            if (!individualEntityName) {
+                                // Individual is something like string number
+                                // So it would be serialized to either that type or object
+                                // Safe to return here
+                                return undefined;
+                            }
+                            if (commonEntityName) {
+                                // Note this is in sync with the transformation that happens for type node.
+                                // Keep this in sync with serializeUnionOrIntersectionType
+                                // Verify if they refer to same entity and is identifier
+                                // return undefined if they dont match because we would emit object
+                                if (!ts.isIdentifier(commonEntityName) ||
+                                    !ts.isIdentifier(individualEntityName) ||
+                                    commonEntityName.text !== individualEntityName.text) {
+                                    return undefined;
+                                }
+                            }
+                            else {
+                                commonEntityName = individualEntityName;
+                            }
+                        }
+                        return commonEntityName;
+                    case 168 /* ParenthesizedType */:
+                        return getEntityNameForDecoratorMetadata(node.type);
+                    case 159 /* TypeReference */:
+                        return node.typeName;
                 }
             }
-            return undefined;
         }
-        // Instantiate a generic signature in the context of a non-generic signature (section 3.8.5 in TypeScript spec)
-        function instantiateSignatureInContextOf(signature, contextualSignature, contextualMapper) {
-            var context = createInferenceContext(signature, /*inferUnionTypes*/ true);
-            forEachMatchingParameterType(contextualSignature, signature, function (source, target) {
-                // Type parameters from outer context referenced by source type are fixed by instantiation of the source type
-                inferTypes(context, instantiateType(source, contextualMapper), target);
-            });
-            return getSignatureInstantiation(signature, getInferredTypes(context));
+        function getParameterTypeNodeForDecoratorCheck(node) {
+            var typeNode = ts.getEffectiveTypeAnnotationNode(node);
+            return ts.isRestParameter(node) ? ts.getRestParameterElementType(typeNode) : typeNode;
         }
-        function inferTypeArguments(node, signature, args, excludeArgument, context) {
-            var typeParameters = signature.typeParameters;
-            var inferenceMapper = getInferenceMapper(context);
-            // Clear out all the inference results from the last time inferTypeArguments was called on this context
-            for (var i = 0; i < typeParameters.length; i++) {
-                // As an optimization, we don't have to clear (and later recompute) inferred types
-                // for type parameters that have already been fixed on the previous call to inferTypeArguments.
-                // It would be just as correct to reset all of them. But then we'd be repeating the same work
-                // for the type parameters that were fixed, namely the work done by getInferredType.
-                if (!context.inferences[i].isFixed) {
-                    context.inferredTypes[i] = undefined;
-                }
+        /** Check the decorators of a node */
+        function checkDecorators(node) {
+            if (!node.decorators) {
+                return;
             }
-            // On this call to inferTypeArguments, we may get more inferences for certain type parameters that were not
-            // fixed last time. This means that a type parameter that failed inference last time may succeed this time,
-            // or vice versa. Therefore, the failedTypeParameterIndex is useless if it points to an unfixed type parameter,
-            // because it may change. So here we reset it. However, getInferredType will not revisit any type parameters
-            // that were previously fixed. So if a fixed type parameter failed previously, it will fail again because
-            // it will contain the exact same set of inferences. So if we reset the index from a fixed type parameter,
-            // we will lose information that we won't recover this time around.
-            if (context.failedTypeParameterIndex !== undefined && !context.inferences[context.failedTypeParameterIndex].isFixed) {
-                context.failedTypeParameterIndex = undefined;
+            // skip this check for nodes that cannot have decorators. These should have already had an error reported by
+            // checkGrammarDecorators.
+            if (!ts.nodeCanBeDecorated(node)) {
+                return;
             }
-            var thisType = getThisTypeOfSignature(signature);
-            if (thisType) {
-                var thisArgumentNode = getThisArgumentOfCall(node);
-                var thisArgumentType = thisArgumentNode ? checkExpression(thisArgumentNode) : voidType;
-                inferTypes(context, thisArgumentType, thisType);
+            if (!compilerOptions.experimentalDecorators) {
+                error(node, ts.Diagnostics.Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning);
             }
-            // We perform two passes over the arguments. In the first pass we infer from all arguments, but use
-            // wildcards for all context sensitive function expressions.
-            var argCount = getEffectiveArgumentCount(node, args, signature);
-            for (var i = 0; i < argCount; i++) {
-                var arg = getEffectiveArgument(node, args, i);
-                // If the effective argument is 'undefined', then it is an argument that is present but is synthetic.
-                if (arg === undefined || arg.kind !== 193 /* OmittedExpression */) {
-                    var paramType = getTypeAtPosition(signature, i);
-                    var argType = getEffectiveArgumentType(node, i, arg);
-                    // If the effective argument type is 'undefined', there is no synthetic type
-                    // for the argument. In that case, we should check the argument.
-                    if (argType === undefined) {
-                        // For context sensitive arguments we pass the identityMapper, which is a signal to treat all
-                        // context sensitive function expressions as wildcards
-                        var mapper = excludeArgument && excludeArgument[i] !== undefined ? identityMapper : inferenceMapper;
-                        argType = checkExpressionWithContextualType(arg, paramType, mapper);
-                    }
-                    inferTypes(context, argType, paramType);
-                }
+            var firstDecorator = node.decorators[0];
+            checkExternalEmitHelpers(firstDecorator, 8 /* Decorate */);
+            if (node.kind === 146 /* Parameter */) {
+                checkExternalEmitHelpers(firstDecorator, 32 /* Param */);
             }
-            // In the second pass we visit only context sensitive arguments, and only those that aren't excluded, this
-            // time treating function expressions normally (which may cause previously inferred type arguments to be fixed
-            // as we construct types for contextually typed parameters)
-            // Decorators will not have `excludeArgument`, as their arguments cannot be contextually typed.
-            // Tagged template expressions will always have `undefined` for `excludeArgument[0]`.
-            if (excludeArgument) {
-                for (var i = 0; i < argCount; i++) {
-                    // No need to check for omitted args and template expressions, their exclusion value is always undefined
-                    if (excludeArgument[i] === false) {
-                        var arg = args[i];
-                        var paramType = getTypeAtPosition(signature, i);
-                        inferTypes(context, checkExpressionWithContextualType(arg, paramType, inferenceMapper), paramType);
-                    }
+            if (compilerOptions.emitDecoratorMetadata) {
+                checkExternalEmitHelpers(firstDecorator, 16 /* Metadata */);
+                // we only need to perform these checks if we are emitting serialized type metadata for the target of a decorator.
+                switch (node.kind) {
+                    case 229 /* ClassDeclaration */:
+                        var constructor = ts.getFirstConstructorWithBody(node);
+                        if (constructor) {
+                            for (var _i = 0, _a = constructor.parameters; _i < _a.length; _i++) {
+                                var parameter = _a[_i];
+                                markDecoratorMedataDataTypeNodeAsReferenced(getParameterTypeNodeForDecoratorCheck(parameter));
+                            }
+                        }
+                        break;
+                    case 151 /* MethodDeclaration */:
+                    case 153 /* GetAccessor */:
+                    case 154 /* SetAccessor */:
+                        for (var _b = 0, _c = node.parameters; _b < _c.length; _b++) {
+                            var parameter = _c[_b];
+                            markDecoratorMedataDataTypeNodeAsReferenced(getParameterTypeNodeForDecoratorCheck(parameter));
+                        }
+                        markDecoratorMedataDataTypeNodeAsReferenced(ts.getEffectiveReturnTypeNode(node));
+                        break;
+                    case 149 /* PropertyDeclaration */:
+                        markDecoratorMedataDataTypeNodeAsReferenced(ts.getEffectiveTypeAnnotationNode(node));
+                        break;
+                    case 146 /* Parameter */:
+                        markDecoratorMedataDataTypeNodeAsReferenced(getParameterTypeNodeForDecoratorCheck(node));
+                        break;
                 }
             }
-            getInferredTypes(context);
+            ts.forEach(node.decorators, checkDecorator);
         }
-        function checkTypeArguments(signature, typeArgumentNodes, typeArgumentTypes, reportErrors, headMessage) {
-            var typeParameters = signature.typeParameters;
-            var typeArgumentsAreAssignable = true;
-            var mapper;
-            for (var i = 0; i < typeParameters.length; i++) {
-                if (typeArgumentsAreAssignable /* so far */) {
-                    var constraint = getConstraintOfTypeParameter(typeParameters[i]);
-                    if (constraint) {
-                        var errorInfo = void 0;
-                        var typeArgumentHeadMessage = ts.Diagnostics.Type_0_does_not_satisfy_the_constraint_1;
-                        if (reportErrors && headMessage) {
-                            errorInfo = ts.chainDiagnosticMessages(errorInfo, typeArgumentHeadMessage);
-                            typeArgumentHeadMessage = headMessage;
-                        }
-                        if (!mapper) {
-                            mapper = createTypeMapper(typeParameters, typeArgumentTypes);
-                        }
-                        var typeArgument = typeArgumentTypes[i];
-                        typeArgumentsAreAssignable = checkTypeAssignableTo(typeArgument, getTypeWithThisArgument(instantiateType(constraint, mapper), typeArgument), reportErrors ? typeArgumentNodes[i] : undefined, typeArgumentHeadMessage, errorInfo);
-                    }
-                }
+        function checkFunctionDeclaration(node) {
+            if (produceDiagnostics) {
+                checkFunctionOrMethodDeclaration(node);
+                checkGrammarForGenerator(node);
+                checkCollisionWithCapturedSuperVariable(node, node.name);
+                checkCollisionWithCapturedThisVariable(node, node.name);
+                checkCollisionWithCapturedNewTargetVariable(node, node.name);
+                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
+                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
             }
-            return typeArgumentsAreAssignable;
         }
-        function checkApplicableSignature(node, args, signature, relation, excludeArgument, reportErrors) {
-            var thisType = getThisTypeOfSignature(signature);
-            if (thisType && thisType !== voidType && node.kind !== 175 /* NewExpression */) {
-                // If the called expression is not of the form `x.f` or `x["f"]`, then sourceType = voidType
-                // If the signature's 'this' type is voidType, then the check is skipped -- anything is compatible.
-                // If the expression is a new expression, then the check is skipped.
-                var thisArgumentNode = getThisArgumentOfCall(node);
-                var thisArgumentType = thisArgumentNode ? checkExpression(thisArgumentNode) : voidType;
-                var errorNode = reportErrors ? (thisArgumentNode || node) : undefined;
-                var headMessage_1 = ts.Diagnostics.The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1;
-                if (!checkTypeRelatedTo(thisArgumentType, getThisTypeOfSignature(signature), relation, errorNode, headMessage_1)) {
-                    return false;
-                }
+        function checkFunctionOrMethodDeclaration(node) {
+            checkDecorators(node);
+            checkSignatureDeclaration(node);
+            var functionFlags = ts.getFunctionFlags(node);
+            // Do not use hasDynamicName here, because that returns false for well known symbols.
+            // We want to perform checkComputedPropertyName for all computed properties, including
+            // well known symbols.
+            if (node.name && node.name.kind === 144 /* ComputedPropertyName */) {
+                // This check will account for methods in class/interface declarations,
+                // as well as accessors in classes/object literals
+                checkComputedPropertyName(node.name);
             }
-            var headMessage = ts.Diagnostics.Argument_of_type_0_is_not_assignable_to_parameter_of_type_1;
-            var argCount = getEffectiveArgumentCount(node, args, signature);
-            for (var i = 0; i < argCount; i++) {
-                var arg = getEffectiveArgument(node, args, i);
-                // If the effective argument is 'undefined', then it is an argument that is present but is synthetic.
-                if (arg === undefined || arg.kind !== 193 /* OmittedExpression */) {
-                    // Check spread elements against rest type (from arity check we know spread argument corresponds to a rest parameter)
-                    var paramType = getTypeAtPosition(signature, i);
-                    var argType = getEffectiveArgumentType(node, i, arg);
-                    // If the effective argument type is 'undefined', there is no synthetic type
-                    // for the argument. In that case, we should check the argument.
-                    if (argType === undefined) {
-                        argType = checkExpressionWithContextualType(arg, paramType, excludeArgument && excludeArgument[i] ? identityMapper : undefined);
-                    }
-                    // Use argument expression as error location when reporting errors
-                    var errorNode = reportErrors ? getEffectiveArgumentErrorNode(node, i, arg) : undefined;
-                    if (!checkTypeRelatedTo(argType, paramType, relation, errorNode, headMessage)) {
-                        return false;
+            if (!ts.hasDynamicName(node)) {
+                // first we want to check the local symbol that contain this declaration
+                // - if node.localSymbol !== undefined - this is current declaration is exported and localSymbol points to the local symbol
+                // - if node.localSymbol === undefined - this node is non-exported so we can just pick the result of getSymbolOfNode
+                var symbol = getSymbolOfNode(node);
+                var localSymbol = node.localSymbol || symbol;
+                // Since the javascript won't do semantic analysis like typescript,
+                // if the javascript file comes before the typescript file and both contain same name functions,
+                // checkFunctionOrConstructorSymbol wouldn't be called if we didnt ignore javascript function.
+                var firstDeclaration = ts.forEach(localSymbol.declarations, 
+                // Get first non javascript function declaration
+                function (declaration) { return declaration.kind === node.kind && !ts.isSourceFileJavaScript(ts.getSourceFileOfNode(declaration)) ?
+                    declaration : undefined; });
+                // Only type check the symbol once
+                if (node === firstDeclaration) {
+                    checkFunctionOrConstructorSymbol(localSymbol);
+                }
+                if (symbol.parent) {
+                    // run check once for the first declaration
+                    if (ts.getDeclarationOfKind(symbol, node.kind) === node) {
+                        // run check on export symbol to check that modifiers agree across all exported declarations
+                        checkFunctionOrConstructorSymbol(symbol);
                     }
                 }
             }
-            return true;
-        }
-        /**
-         * Returns the this argument in calls like x.f(...) and x[f](...). Undefined otherwise.
-         */
-        function getThisArgumentOfCall(node) {
-            if (node.kind === 174 /* CallExpression */) {
-                var callee = node.expression;
-                if (callee.kind === 172 /* PropertyAccessExpression */) {
-                    return callee.expression;
+            checkSourceElement(node.body);
+            var returnTypeNode = ts.getEffectiveReturnTypeNode(node);
+            if ((functionFlags & 1 /* Generator */) === 0) {
+                var returnOrPromisedType = returnTypeNode && (functionFlags & 2 /* Async */
+                    ? checkAsyncFunctionReturnType(node) // Async function
+                    : getTypeFromTypeNode(returnTypeNode)); // normal function
+                checkAllCodePathsInNonVoidFunctionReturnOrThrow(node, returnOrPromisedType);
+            }
+            if (produceDiagnostics && !returnTypeNode) {
+                // Report an implicit any error if there is no body, no explicit return type, and node is not a private method
+                // in an ambient context
+                if (noImplicitAny && ts.nodeIsMissing(node.body) && !isPrivateWithinAmbient(node)) {
+                    reportImplicitAnyError(node, anyType);
                 }
-                else if (callee.kind === 173 /* ElementAccessExpression */) {
-                    return callee.expression;
+                if (functionFlags & 1 /* Generator */ && ts.nodeIsPresent(node.body)) {
+                    // A generator with a body and no type annotation can still cause errors. It can error if the
+                    // yielded values have no common supertype, or it can give an implicit any error if it has no
+                    // yielded values. The only way to trigger these errors is to try checking its return type.
+                    getReturnTypeOfSignature(getSignatureFromDeclaration(node));
                 }
             }
+            registerForUnusedIdentifiersCheck(node);
         }
-        /**
-         * Returns the effective arguments for an expression that works like a function invocation.
-         *
-         * If 'node' is a CallExpression or a NewExpression, then its argument list is returned.
-         * If 'node' is a TaggedTemplateExpression, a new argument list is constructed from the substitution
-         *    expressions, where the first element of the list is `undefined`.
-         * If 'node' is a Decorator, the argument list will be `undefined`, and its arguments and types
-         *    will be supplied from calls to `getEffectiveArgumentCount` and `getEffectiveArgumentType`.
-         */
-        function getEffectiveCallArguments(node) {
-            var args;
-            if (node.kind === 176 /* TaggedTemplateExpression */) {
-                var template = node.template;
-                args = [undefined];
-                if (template.kind === 189 /* TemplateExpression */) {
-                    ts.forEach(template.templateSpans, function (span) {
-                        args.push(span.expression);
-                    });
-                }
-            }
-            else if (node.kind === 143 /* Decorator */) {
-                // For a decorator, we return undefined as we will determine
-                // the number and types of arguments for a decorator using
-                // `getEffectiveArgumentCount` and `getEffectiveArgumentType` below.
-                return undefined;
-            }
-            else {
-                args = node.arguments || emptyArray;
+        function registerForUnusedIdentifiersCheck(node) {
+            if (deferredUnusedIdentifierNodes) {
+                deferredUnusedIdentifierNodes.push(node);
             }
-            return args;
         }
-        /**
-          * Returns the effective argument count for a node that works like a function invocation.
-          * If 'node' is a Decorator, the number of arguments is derived from the decoration
-          *    target and the signature:
-          *    If 'node.target' is a class declaration or class expression, the effective argument
-          *       count is 1.
-          *    If 'node.target' is a parameter declaration, the effective argument count is 3.
-          *    If 'node.target' is a property declaration, the effective argument count is 2.
-          *    If 'node.target' is a method or accessor declaration, the effective argument count
-          *       is 3, although it can be 2 if the signature only accepts two arguments, allowing
-          *       us to match a property decorator.
-          * Otherwise, the argument count is the length of the 'args' array.
-          */
-        function getEffectiveArgumentCount(node, args, signature) {
-            if (node.kind === 143 /* Decorator */) {
-                switch (node.parent.kind) {
-                    case 221 /* ClassDeclaration */:
-                    case 192 /* ClassExpression */:
-                        // A class decorator will have one argument (see `ClassDecorator` in core.d.ts)
-                        return 1;
-                    case 145 /* PropertyDeclaration */:
-                        // A property declaration decorator will have two arguments (see
-                        // `PropertyDecorator` in core.d.ts)
-                        return 2;
-                    case 147 /* MethodDeclaration */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                        // A method or accessor declaration decorator will have two or three arguments (see
-                        // `PropertyDecorator` and `MethodDecorator` in core.d.ts)
-                        // If we are emitting decorators for ES3, we will only pass two arguments.
-                        if (languageVersion === 0 /* ES3 */) {
-                            return 2;
-                        }
-                        // If the method decorator signature only accepts a target and a key, we will only
-                        // type check those arguments.
-                        return signature.parameters.length >= 3 ? 3 : 2;
-                    case 142 /* Parameter */:
-                        // A parameter declaration decorator will have three arguments (see
-                        // `ParameterDecorator` in core.d.ts)
-                        return 3;
+        function checkUnusedIdentifiers() {
+            if (deferredUnusedIdentifierNodes) {
+                for (var _i = 0, deferredUnusedIdentifierNodes_1 = deferredUnusedIdentifierNodes; _i < deferredUnusedIdentifierNodes_1.length; _i++) {
+                    var node = deferredUnusedIdentifierNodes_1[_i];
+                    switch (node.kind) {
+                        case 265 /* SourceFile */:
+                        case 233 /* ModuleDeclaration */:
+                            checkUnusedModuleMembers(node);
+                            break;
+                        case 229 /* ClassDeclaration */:
+                        case 199 /* ClassExpression */:
+                            checkUnusedClassMembers(node);
+                            checkUnusedTypeParameters(node);
+                            break;
+                        case 230 /* InterfaceDeclaration */:
+                            checkUnusedTypeParameters(node);
+                            break;
+                        case 207 /* Block */:
+                        case 235 /* CaseBlock */:
+                        case 214 /* ForStatement */:
+                        case 215 /* ForInStatement */:
+                        case 216 /* ForOfStatement */:
+                            checkUnusedLocalsAndParameters(node);
+                            break;
+                        case 152 /* Constructor */:
+                        case 186 /* FunctionExpression */:
+                        case 228 /* FunctionDeclaration */:
+                        case 187 /* ArrowFunction */:
+                        case 151 /* MethodDeclaration */:
+                        case 153 /* GetAccessor */:
+                        case 154 /* SetAccessor */:
+                            if (node.body) {
+                                checkUnusedLocalsAndParameters(node);
+                            }
+                            checkUnusedTypeParameters(node);
+                            break;
+                        case 150 /* MethodSignature */:
+                        case 155 /* CallSignature */:
+                        case 156 /* ConstructSignature */:
+                        case 157 /* IndexSignature */:
+                        case 160 /* FunctionType */:
+                        case 161 /* ConstructorType */:
+                            checkUnusedTypeParameters(node);
+                            break;
+                    }
                 }
             }
-            else {
-                return args.length;
+        }
+        function checkUnusedLocalsAndParameters(node) {
+            if (node.parent.kind !== 230 /* InterfaceDeclaration */ && noUnusedIdentifiers && !ts.isInAmbientContext(node)) {
+                node.locals.forEach(function (local) {
+                    if (!local.isReferenced) {
+                        if (local.valueDeclaration && ts.getRootDeclaration(local.valueDeclaration).kind === 146 /* Parameter */) {
+                            var parameter = ts.getRootDeclaration(local.valueDeclaration);
+                            var name_27 = ts.getNameOfDeclaration(local.valueDeclaration);
+                            if (compilerOptions.noUnusedParameters &&
+                                !ts.isParameterPropertyDeclaration(parameter) &&
+                                !ts.parameterIsThisKeyword(parameter) &&
+                                !parameterNameStartsWithUnderscore(name_27)) {
+                                error(name_27, ts.Diagnostics._0_is_declared_but_never_used, local.name);
+                            }
+                        }
+                        else if (compilerOptions.noUnusedLocals) {
+                            ts.forEach(local.declarations, function (d) { return errorUnusedLocal(ts.getNameOfDeclaration(d) || d, local.name); });
+                        }
+                    }
+                });
             }
         }
-        /**
-          * Returns the effective type of the first argument to a decorator.
-          * If 'node' is a class declaration or class expression, the effective argument type
-          *    is the type of the static side of the class.
-          * If 'node' is a parameter declaration, the effective argument type is either the type
-          *    of the static or instance side of the class for the parameter's parent method,
-          *    depending on whether the method is declared static.
-          *    For a constructor, the type is always the type of the static side of the class.
-          * If 'node' is a property, method, or accessor declaration, the effective argument
-          *    type is the type of the static or instance side of the parent class for class
-          *    element, depending on whether the element is declared static.
-          */
-        function getEffectiveDecoratorFirstArgumentType(node) {
-            // The first argument to a decorator is its `target`.
-            if (node.kind === 221 /* ClassDeclaration */) {
-                // For a class decorator, the `target` is the type of the class (e.g. the
-                // "static" or "constructor" side of the class)
-                var classSymbol = getSymbolOfNode(node);
-                return getTypeOfSymbol(classSymbol);
+        function isRemovedPropertyFromObjectSpread(node) {
+            if (ts.isBindingElement(node) && ts.isObjectBindingPattern(node.parent)) {
+                var lastElement = ts.lastOrUndefined(node.parent.elements);
+                return lastElement !== node && !!lastElement.dotDotDotToken;
             }
-            if (node.kind === 142 /* Parameter */) {
-                // For a parameter decorator, the `target` is the parent type of the
-                // parameter's containing method.
-                node = node.parent;
-                if (node.kind === 148 /* Constructor */) {
-                    var classSymbol = getSymbolOfNode(node);
-                    return getTypeOfSymbol(classSymbol);
+            return false;
+        }
+        function errorUnusedLocal(node, name) {
+            if (isIdentifierThatStartsWithUnderScore(node)) {
+                var declaration = ts.getRootDeclaration(node.parent);
+                if (declaration.kind === 226 /* VariableDeclaration */ && ts.isForInOrOfStatement(declaration.parent.parent)) {
+                    return;
                 }
             }
-            if (node.kind === 145 /* PropertyDeclaration */ ||
-                node.kind === 147 /* MethodDeclaration */ ||
-                node.kind === 149 /* GetAccessor */ ||
-                node.kind === 150 /* SetAccessor */) {
-                // For a property or method decorator, the `target` is the
-                // "static"-side type of the parent of the member if the member is
-                // declared "static"; otherwise, it is the "instance"-side type of the
-                // parent of the member.
-                return getParentTypeOfClassElement(node);
+            if (!isRemovedPropertyFromObjectSpread(node.kind === 71 /* Identifier */ ? node.parent : node)) {
+                error(node, ts.Diagnostics._0_is_declared_but_never_used, name);
             }
-            ts.Debug.fail("Unsupported decorator target.");
-            return unknownType;
         }
-        /**
-          * Returns the effective type for the second argument to a decorator.
-          * If 'node' is a parameter, its effective argument type is one of the following:
-          *    If 'node.parent' is a constructor, the effective argument type is 'any', as we
-          *       will emit `undefined`.
-          *    If 'node.parent' is a member with an identifier, numeric, or string literal name,
-          *       the effective argument type will be a string literal type for the member name.
-          *    If 'node.parent' is a computed property name, the effective argument type will
-          *       either be a symbol type or the string type.
-          * If 'node' is a member with an identifier, numeric, or string literal name, the
-          *    effective argument type will be a string literal type for the member name.
-          * If 'node' is a computed property name, the effective argument type will either
-          *    be a symbol type or the string type.
-          * A class decorator does not have a second argument type.
-          */
-        function getEffectiveDecoratorSecondArgumentType(node) {
-            // The second argument to a decorator is its `propertyKey`
-            if (node.kind === 221 /* ClassDeclaration */) {
-                ts.Debug.fail("Class decorators should not have a second synthetic argument.");
-                return unknownType;
-            }
-            if (node.kind === 142 /* Parameter */) {
-                node = node.parent;
-                if (node.kind === 148 /* Constructor */) {
-                    // For a constructor parameter decorator, the `propertyKey` will be `undefined`.
-                    return anyType;
+        function parameterNameStartsWithUnderscore(parameterName) {
+            return parameterName && isIdentifierThatStartsWithUnderScore(parameterName);
+        }
+        function isIdentifierThatStartsWithUnderScore(node) {
+            return node.kind === 71 /* Identifier */ && node.text.charCodeAt(0) === 95 /* _ */;
+        }
+        function checkUnusedClassMembers(node) {
+            if (compilerOptions.noUnusedLocals && !ts.isInAmbientContext(node)) {
+                if (node.members) {
+                    for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
+                        var member = _a[_i];
+                        if (member.kind === 151 /* MethodDeclaration */ || member.kind === 149 /* PropertyDeclaration */) {
+                            if (!member.symbol.isReferenced && ts.getModifierFlags(member) & 8 /* Private */) {
+                                error(member.name, ts.Diagnostics._0_is_declared_but_never_used, member.symbol.name);
+                            }
+                        }
+                        else if (member.kind === 152 /* Constructor */) {
+                            for (var _b = 0, _c = member.parameters; _b < _c.length; _b++) {
+                                var parameter = _c[_b];
+                                if (!parameter.symbol.isReferenced && ts.getModifierFlags(parameter) & 8 /* Private */) {
+                                    error(parameter.name, ts.Diagnostics.Property_0_is_declared_but_never_used, parameter.symbol.name);
+                                }
+                            }
+                        }
+                    }
                 }
             }
-            if (node.kind === 145 /* PropertyDeclaration */ ||
-                node.kind === 147 /* MethodDeclaration */ ||
-                node.kind === 149 /* GetAccessor */ ||
-                node.kind === 150 /* SetAccessor */) {
-                // The `propertyKey` for a property or method decorator will be a
-                // string literal type if the member name is an identifier, number, or string;
-                // otherwise, if the member name is a computed property name it will
-                // be either string or symbol.
-                var element = node;
-                switch (element.name.kind) {
-                    case 69 /* Identifier */:
-                    case 8 /* NumericLiteral */:
-                    case 9 /* StringLiteral */:
-                        return getLiteralTypeForText(32 /* StringLiteral */, element.name.text);
-                    case 140 /* ComputedPropertyName */:
-                        var nameType = checkComputedPropertyName(element.name);
-                        if (isTypeOfKind(nameType, 512 /* ESSymbol */)) {
-                            return nameType;
-                        }
-                        else {
-                            return stringType;
+        }
+        function checkUnusedTypeParameters(node) {
+            if (compilerOptions.noUnusedLocals && !ts.isInAmbientContext(node)) {
+                if (node.typeParameters) {
+                    // Only report errors on the last declaration for the type parameter container;
+                    // this ensures that all uses have been accounted for.
+                    var symbol = getSymbolOfNode(node);
+                    var lastDeclaration = symbol && symbol.declarations && ts.lastOrUndefined(symbol.declarations);
+                    if (lastDeclaration !== node) {
+                        return;
+                    }
+                    for (var _i = 0, _a = node.typeParameters; _i < _a.length; _i++) {
+                        var typeParameter = _a[_i];
+                        if (!getMergedSymbol(typeParameter.symbol).isReferenced) {
+                            error(typeParameter.name, ts.Diagnostics._0_is_declared_but_never_used, typeParameter.symbol.name);
                         }
-                    default:
-                        ts.Debug.fail("Unsupported property name.");
-                        return unknownType;
+                    }
                 }
             }
-            ts.Debug.fail("Unsupported decorator target.");
-            return unknownType;
         }
-        /**
-          * Returns the effective argument type for the third argument to a decorator.
-          * If 'node' is a parameter, the effective argument type is the number type.
-          * If 'node' is a method or accessor, the effective argument type is a
-          *    `TypedPropertyDescriptor<T>` instantiated with the type of the member.
-          * Class and property decorators do not have a third effective argument.
-          */
-        function getEffectiveDecoratorThirdArgumentType(node) {
-            // The third argument to a decorator is either its `descriptor` for a method decorator
-            // or its `parameterIndex` for a parameter decorator
-            if (node.kind === 221 /* ClassDeclaration */) {
-                ts.Debug.fail("Class decorators should not have a third synthetic argument.");
-                return unknownType;
+        function checkUnusedModuleMembers(node) {
+            if (compilerOptions.noUnusedLocals && !ts.isInAmbientContext(node)) {
+                node.locals.forEach(function (local) {
+                    if (!local.isReferenced && !local.exportSymbol) {
+                        for (var _i = 0, _a = local.declarations; _i < _a.length; _i++) {
+                            var declaration = _a[_i];
+                            if (!ts.isAmbientModule(declaration)) {
+                                errorUnusedLocal(ts.getNameOfDeclaration(declaration), local.name);
+                            }
+                        }
+                    }
+                });
             }
-            if (node.kind === 142 /* Parameter */) {
-                // The `parameterIndex` for a parameter decorator is always a number
-                return numberType;
+        }
+        function checkBlock(node) {
+            // Grammar checking for SyntaxKind.Block
+            if (node.kind === 207 /* Block */) {
+                checkGrammarStatementInAmbientContext(node);
             }
-            if (node.kind === 145 /* PropertyDeclaration */) {
-                ts.Debug.fail("Property decorators should not have a third synthetic argument.");
-                return unknownType;
+            ts.forEach(node.statements, checkSourceElement);
+            if (node.locals) {
+                registerForUnusedIdentifiersCheck(node);
             }
-            if (node.kind === 147 /* MethodDeclaration */ ||
-                node.kind === 149 /* GetAccessor */ ||
-                node.kind === 150 /* SetAccessor */) {
-                // The `descriptor` for a method decorator will be a `TypedPropertyDescriptor<T>`
-                // for the type of the member.
-                var propertyType = getTypeOfNode(node);
-                return createTypedPropertyDescriptorType(propertyType);
+        }
+        function checkCollisionWithArgumentsInGeneratedCode(node) {
+            // no rest parameters \ declaration context \ overload - no codegen impact
+            if (!ts.hasDeclaredRestParameter(node) || ts.isInAmbientContext(node) || ts.nodeIsMissing(node.body)) {
+                return;
             }
-            ts.Debug.fail("Unsupported decorator target.");
-            return unknownType;
+            ts.forEach(node.parameters, function (p) {
+                if (p.name && !ts.isBindingPattern(p.name) && p.name.text === argumentsSymbol.name) {
+                    error(p, ts.Diagnostics.Duplicate_identifier_arguments_Compiler_uses_arguments_to_initialize_rest_parameters);
+                }
+            });
         }
-        /**
-          * Returns the effective argument type for the provided argument to a decorator.
-          */
-        function getEffectiveDecoratorArgumentType(node, argIndex) {
-            if (argIndex === 0) {
-                return getEffectiveDecoratorFirstArgumentType(node.parent);
+        function needCollisionCheckForIdentifier(node, identifier, name) {
+            if (!(identifier && identifier.text === name)) {
+                return false;
             }
-            else if (argIndex === 1) {
-                return getEffectiveDecoratorSecondArgumentType(node.parent);
+            if (node.kind === 149 /* PropertyDeclaration */ ||
+                node.kind === 148 /* PropertySignature */ ||
+                node.kind === 151 /* MethodDeclaration */ ||
+                node.kind === 150 /* MethodSignature */ ||
+                node.kind === 153 /* GetAccessor */ ||
+                node.kind === 154 /* SetAccessor */) {
+                // it is ok to have member named '_super' or '_this' - member access is always qualified
+                return false;
             }
-            else if (argIndex === 2) {
-                return getEffectiveDecoratorThirdArgumentType(node.parent);
+            if (ts.isInAmbientContext(node)) {
+                // ambient context - no codegen impact
+                return false;
             }
-            ts.Debug.fail("Decorators should not have a fourth synthetic argument.");
-            return unknownType;
-        }
-        /**
-          * Gets the effective argument type for an argument in a call expression.
-          */
-        function getEffectiveArgumentType(node, argIndex, arg) {
-            // Decorators provide special arguments, a tagged template expression provides
-            // a special first argument, and string literals get string literal types
-            // unless we're reporting errors
-            if (node.kind === 143 /* Decorator */) {
-                return getEffectiveDecoratorArgumentType(node, argIndex);
+            var root = ts.getRootDeclaration(node);
+            if (root.kind === 146 /* Parameter */ && ts.nodeIsMissing(root.parent.body)) {
+                // just an overload - no codegen impact
+                return false;
             }
-            else if (argIndex === 0 && node.kind === 176 /* TaggedTemplateExpression */) {
-                return getGlobalTemplateStringsArrayType();
+            return true;
+        }
+        function checkCollisionWithCapturedThisVariable(node, name) {
+            if (needCollisionCheckForIdentifier(node, name, "_this")) {
+                potentialThisCollisions.push(node);
             }
-            // This is not a synthetic argument, so we return 'undefined'
-            // to signal that the caller needs to check the argument.
-            return undefined;
         }
-        /**
-          * Gets the effective argument expression for an argument in a call expression.
-          */
-        function getEffectiveArgument(node, args, argIndex) {
-            // For a decorator or the first argument of a tagged template expression we return undefined.
-            if (node.kind === 143 /* Decorator */ ||
-                (argIndex === 0 && node.kind === 176 /* TaggedTemplateExpression */)) {
-                return undefined;
+        function checkCollisionWithCapturedNewTargetVariable(node, name) {
+            if (needCollisionCheckForIdentifier(node, name, "_newTarget")) {
+                potentialNewTargetCollisions.push(node);
             }
-            return args[argIndex];
         }
-        /**
-          * Gets the error node to use when reporting errors for an effective argument.
-          */
-        function getEffectiveArgumentErrorNode(node, argIndex, arg) {
-            if (node.kind === 143 /* Decorator */) {
-                // For a decorator, we use the expression of the decorator for error reporting.
-                return node.expression;
+        // this function will run after checking the source file so 'CaptureThis' is correct for all nodes
+        function checkIfThisIsCapturedInEnclosingScope(node) {
+            ts.findAncestor(node, function (current) {
+                if (getNodeCheckFlags(current) & 4 /* CaptureThis */) {
+                    var isDeclaration_1 = node.kind !== 71 /* Identifier */;
+                    if (isDeclaration_1) {
+                        error(ts.getNameOfDeclaration(node), ts.Diagnostics.Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference);
+                    }
+                    else {
+                        error(node, ts.Diagnostics.Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference);
+                    }
+                    return true;
+                }
+            });
+        }
+        function checkIfNewTargetIsCapturedInEnclosingScope(node) {
+            ts.findAncestor(node, function (current) {
+                if (getNodeCheckFlags(current) & 8 /* CaptureNewTarget */) {
+                    var isDeclaration_2 = node.kind !== 71 /* Identifier */;
+                    if (isDeclaration_2) {
+                        error(ts.getNameOfDeclaration(node), ts.Diagnostics.Duplicate_identifier_newTarget_Compiler_uses_variable_declaration_newTarget_to_capture_new_target_meta_property_reference);
+                    }
+                    else {
+                        error(node, ts.Diagnostics.Expression_resolves_to_variable_declaration_newTarget_that_compiler_uses_to_capture_new_target_meta_property_reference);
+                    }
+                    return true;
+                }
+            });
+        }
+        function checkCollisionWithCapturedSuperVariable(node, name) {
+            if (!needCollisionCheckForIdentifier(node, name, "_super")) {
+                return;
             }
-            else if (argIndex === 0 && node.kind === 176 /* TaggedTemplateExpression */) {
-                // For a the first argument of a tagged template expression, we use the template of the tag for error reporting.
-                return node.template;
+            // bubble up and find containing type
+            var enclosingClass = ts.getContainingClass(node);
+            // if containing type was not found or it is ambient - exit (no codegen)
+            if (!enclosingClass || ts.isInAmbientContext(enclosingClass)) {
+                return;
             }
-            else {
-                return arg;
+            if (ts.getClassExtendsHeritageClauseElement(enclosingClass)) {
+                var isDeclaration_3 = node.kind !== 71 /* Identifier */;
+                if (isDeclaration_3) {
+                    error(node, ts.Diagnostics.Duplicate_identifier_super_Compiler_uses_super_to_capture_base_class_reference);
+                }
+                else {
+                    error(node, ts.Diagnostics.Expression_resolves_to_super_that_compiler_uses_to_capture_base_class_reference);
+                }
             }
         }
-        function resolveCall(node, signatures, candidatesOutArray, headMessage) {
-            var isTaggedTemplate = node.kind === 176 /* TaggedTemplateExpression */;
-            var isDecorator = node.kind === 143 /* Decorator */;
-            var typeArguments;
-            if (!isTaggedTemplate && !isDecorator) {
-                typeArguments = node.typeArguments;
-                // We already perform checking on the type arguments on the class declaration itself.
-                if (node.expression.kind !== 95 /* SuperKeyword */) {
-                    ts.forEach(typeArguments, checkSourceElement);
-                }
+        function checkCollisionWithRequireExportsInGeneratedCode(node, name) {
+            // No need to check for require or exports for ES6 modules and later
+            if (modulekind >= ts.ModuleKind.ES2015) {
+                return;
             }
-            var candidates = candidatesOutArray || [];
-            // reorderCandidates fills up the candidates array directly
-            reorderCandidates(signatures, candidates);
-            if (!candidates.length) {
-                reportError(ts.Diagnostics.Supplied_parameters_do_not_match_any_signature_of_call_target);
-                return resolveErrorCall(node);
+            if (!needCollisionCheckForIdentifier(node, name, "require") && !needCollisionCheckForIdentifier(node, name, "exports")) {
+                return;
             }
-            var args = getEffectiveCallArguments(node);
-            // The following applies to any value of 'excludeArgument[i]':
-            //    - true:      the argument at 'i' is susceptible to a one-time permanent contextual typing.
-            //    - undefined: the argument at 'i' is *not* susceptible to permanent contextual typing.
-            //    - false:     the argument at 'i' *was* and *has been* permanently contextually typed.
-            //
-            // The idea is that we will perform type argument inference & assignability checking once
-            // without using the susceptible parameters that are functions, and once more for each of those
-            // parameters, contextually typing each as we go along.
-            //
-            // For a tagged template, then the first argument be 'undefined' if necessary
-            // because it represents a TemplateStringsArray.
-            //
-            // For a decorator, no arguments are susceptible to contextual typing due to the fact
-            // decorators are applied to a declaration by the emitter, and not to an expression.
-            var excludeArgument;
-            if (!isDecorator) {
-                // We do not need to call `getEffectiveArgumentCount` here as it only
-                // applies when calculating the number of arguments for a decorator.
-                for (var i = isTaggedTemplate ? 1 : 0; i < args.length; i++) {
-                    if (isContextSensitive(args[i])) {
-                        if (!excludeArgument) {
-                            excludeArgument = new Array(args.length);
-                        }
-                        excludeArgument[i] = true;
-                    }
-                }
+            // Uninstantiated modules shouldnt do this check
+            if (node.kind === 233 /* ModuleDeclaration */ && ts.getModuleInstanceState(node) !== 1 /* Instantiated */) {
+                return;
             }
-            // The following variables are captured and modified by calls to chooseOverload.
-            // If overload resolution or type argument inference fails, we want to report the
-            // best error possible. The best error is one which says that an argument was not
-            // assignable to a parameter. This implies that everything else about the overload
-            // was fine. So if there is any overload that is only incorrect because of an
-            // argument, we will report an error on that one.
-            //
-            //     function foo(s: string) {}
-            //     function foo(n: number) {} // Report argument error on this overload
-            //     function foo() {}
-            //     foo(true);
-            //
-            // If none of the overloads even made it that far, there are two possibilities.
-            // There was a problem with type arguments for some overload, in which case
-            // report an error on that. Or none of the overloads even had correct arity,
-            // in which case give an arity error.
-            //
-            //     function foo<T>(x: T, y: T) {} // Report type argument inference error
-            //     function foo() {}
-            //     foo(0, true);
-            //
-            var candidateForArgumentError;
-            var candidateForTypeArgumentError;
-            var resultOfFailedInference;
-            var result;
-            // If we are in signature help, a trailing comma indicates that we intend to provide another argument,
-            // so we will only accept overloads with arity at least 1 higher than the current number of provided arguments.
-            var signatureHelpTrailingComma = candidatesOutArray && node.kind === 174 /* CallExpression */ && node.arguments.hasTrailingComma;
-            // Section 4.12.1:
-            // if the candidate list contains one or more signatures for which the type of each argument
-            // expression is a subtype of each corresponding parameter type, the return type of the first
-            // of those signatures becomes the return type of the function call.
-            // Otherwise, the return type of the first signature in the candidate list becomes the return
-            // type of the function call.
-            //
-            // Whether the call is an error is determined by assignability of the arguments. The subtype pass
-            // is just important for choosing the best signature. So in the case where there is only one
-            // signature, the subtype pass is useless. So skipping it is an optimization.
-            if (candidates.length > 1) {
-                result = chooseOverload(candidates, subtypeRelation, signatureHelpTrailingComma);
+            // In case of variable declaration, node.parent is variable statement so look at the variable statement's parent
+            var parent = getDeclarationContainer(node);
+            if (parent.kind === 265 /* SourceFile */ && ts.isExternalOrCommonJsModule(parent)) {
+                // If the declaration happens to be in external module, report error that require and exports are reserved keywords
+                error(name, ts.Diagnostics.Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module, ts.declarationNameToString(name), ts.declarationNameToString(name));
             }
-            if (!result) {
-                // Reinitialize these pointers for round two
-                candidateForArgumentError = undefined;
-                candidateForTypeArgumentError = undefined;
-                resultOfFailedInference = undefined;
-                result = chooseOverload(candidates, assignableRelation, signatureHelpTrailingComma);
+        }
+        function checkCollisionWithGlobalPromiseInGeneratedCode(node, name) {
+            if (languageVersion >= 4 /* ES2017 */ || !needCollisionCheckForIdentifier(node, name, "Promise")) {
+                return;
             }
-            if (result) {
-                return result;
+            // Uninstantiated modules shouldnt do this check
+            if (node.kind === 233 /* ModuleDeclaration */ && ts.getModuleInstanceState(node) !== 1 /* Instantiated */) {
+                return;
             }
-            // No signatures were applicable. Now report errors based on the last applicable signature with
-            // no arguments excluded from assignability checks.
-            // If candidate is undefined, it means that no candidates had a suitable arity. In that case,
-            // skip the checkApplicableSignature check.
-            if (candidateForArgumentError) {
-                // excludeArgument is undefined, in this case also equivalent to [undefined, undefined, ...]
-                // The importance of excludeArgument is to prevent us from typing function expression parameters
-                // in arguments too early. If possible, we'd like to only type them once we know the correct
-                // overload. However, this matters for the case where the call is correct. When the call is
-                // an error, we don't need to exclude any arguments, although it would cause no harm to do so.
-                checkApplicableSignature(node, args, candidateForArgumentError, assignableRelation, /*excludeArgument*/ undefined, /*reportErrors*/ true);
+            // In case of variable declaration, node.parent is variable statement so look at the variable statement's parent
+            var parent = getDeclarationContainer(node);
+            if (parent.kind === 265 /* SourceFile */ && ts.isExternalOrCommonJsModule(parent) && parent.flags & 1024 /* HasAsyncFunctions */) {
+                // If the declaration happens to be in external module, report error that Promise is a reserved identifier.
+                error(name, ts.Diagnostics.Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_containing_async_functions, ts.declarationNameToString(name), ts.declarationNameToString(name));
             }
-            else if (candidateForTypeArgumentError) {
-                if (!isTaggedTemplate && !isDecorator && typeArguments) {
-                    var typeArguments_2 = node.typeArguments;
-                    checkTypeArguments(candidateForTypeArgumentError, typeArguments_2, ts.map(typeArguments_2, getTypeFromTypeNodeNoAlias), /*reportErrors*/ true, headMessage);
-                }
-                else {
-                    ts.Debug.assert(resultOfFailedInference.failedTypeParameterIndex >= 0);
-                    var failedTypeParameter = candidateForTypeArgumentError.typeParameters[resultOfFailedInference.failedTypeParameterIndex];
-                    var inferenceCandidates = getInferenceCandidates(resultOfFailedInference, resultOfFailedInference.failedTypeParameterIndex);
-                    var diagnosticChainHead = ts.chainDiagnosticMessages(/*details*/ undefined, // details will be provided by call to reportNoCommonSupertypeError
-                    ts.Diagnostics.The_type_argument_for_type_parameter_0_cannot_be_inferred_from_the_usage_Consider_specifying_the_type_arguments_explicitly, typeToString(failedTypeParameter));
-                    if (headMessage) {
-                        diagnosticChainHead = ts.chainDiagnosticMessages(diagnosticChainHead, headMessage);
-                    }
-                    reportNoCommonSupertypeError(inferenceCandidates, node.expression || node.tag, diagnosticChainHead);
-                }
+        }
+        function checkVarDeclaredNamesNotShadowed(node) {
+            // - ScriptBody : StatementList
+            // It is a Syntax Error if any element of the LexicallyDeclaredNames of StatementList
+            // also occurs in the VarDeclaredNames of StatementList.
+            // - Block : { StatementList }
+            // It is a Syntax Error if any element of the LexicallyDeclaredNames of StatementList
+            // also occurs in the VarDeclaredNames of StatementList.
+            // Variable declarations are hoisted to the top of their function scope. They can shadow
+            // block scoped declarations, which bind tighter. this will not be flagged as duplicate definition
+            // by the binder as the declaration scope is different.
+            // A non-initialized declaration is a no-op as the block declaration will resolve before the var
+            // declaration. the problem is if the declaration has an initializer. this will act as a write to the
+            // block declared value. this is fine for let, but not const.
+            // Only consider declarations with initializers, uninitialized const declarations will not
+            // step on a let/const variable.
+            // Do not consider const and const declarations, as duplicate block-scoped declarations
+            // are handled by the binder.
+            // We are only looking for const declarations that step on let\const declarations from a
+            // different scope. e.g.:
+            //      {
+            //          const x = 0; // localDeclarationSymbol obtained after name resolution will correspond to this declaration
+            //          const x = 0; // symbol for this declaration will be 'symbol'
+            //      }
+            // skip block-scoped variables and parameters
+            if ((ts.getCombinedNodeFlags(node) & 3 /* BlockScoped */) !== 0 || ts.isParameterDeclaration(node)) {
+                return;
             }
-            else {
-                reportError(ts.Diagnostics.Supplied_parameters_do_not_match_any_signature_of_call_target);
+            // skip variable declarations that don't have initializers
+            // NOTE: in ES6 spec initializer is required in variable declarations where name is binding pattern
+            // so we'll always treat binding elements as initialized
+            if (node.kind === 226 /* VariableDeclaration */ && !node.initializer) {
+                return;
             }
-            // No signature was applicable. We have already reported the errors for the invalid signature.
-            // If this is a type resolution session, e.g. Language Service, try to get better information that anySignature.
-            // Pick the first candidate that matches the arity. This way we can get a contextual type for cases like:
-            //  declare function f(a: { xa: number; xb: number; });
-            //  f({ |
-            if (!produceDiagnostics) {
-                for (var _i = 0, candidates_1 = candidates; _i < candidates_1.length; _i++) {
-                    var candidate = candidates_1[_i];
-                    if (hasCorrectArity(node, args, candidate)) {
-                        if (candidate.typeParameters && typeArguments) {
-                            candidate = getSignatureInstantiation(candidate, ts.map(typeArguments, getTypeFromTypeNodeNoAlias));
+            var symbol = getSymbolOfNode(node);
+            if (symbol.flags & 1 /* FunctionScopedVariable */) {
+                var localDeclarationSymbol = resolveName(node, node.name.text, 3 /* Variable */, /*nodeNotFoundErrorMessage*/ undefined, /*nameArg*/ undefined);
+                if (localDeclarationSymbol &&
+                    localDeclarationSymbol !== symbol &&
+                    localDeclarationSymbol.flags & 2 /* BlockScopedVariable */) {
+                    if (getDeclarationNodeFlagsFromSymbol(localDeclarationSymbol) & 3 /* BlockScoped */) {
+                        var varDeclList = ts.getAncestor(localDeclarationSymbol.valueDeclaration, 227 /* VariableDeclarationList */);
+                        var container = varDeclList.parent.kind === 208 /* VariableStatement */ && varDeclList.parent.parent
+                            ? varDeclList.parent.parent
+                            : undefined;
+                        // names of block-scoped and function scoped variables can collide only
+                        // if block scoped variable is defined in the function\module\source file scope (because of variable hoisting)
+                        var namesShareScope = container &&
+                            (container.kind === 207 /* Block */ && ts.isFunctionLike(container.parent) ||
+                                container.kind === 234 /* ModuleBlock */ ||
+                                container.kind === 233 /* ModuleDeclaration */ ||
+                                container.kind === 265 /* SourceFile */);
+                        // here we know that function scoped variable is shadowed by block scoped one
+                        // if they are defined in the same scope - binder has already reported redeclaration error
+                        // otherwise if variable has an initializer - show error that initialization will fail
+                        // since LHS will be block scoped name instead of function scoped
+                        if (!namesShareScope) {
+                            var name_28 = symbolToString(localDeclarationSymbol);
+                            error(node, ts.Diagnostics.Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1, name_28, name_28);
                         }
-                        return candidate;
                     }
                 }
             }
-            return resolveErrorCall(node);
-            function reportError(message, arg0, arg1, arg2) {
-                var errorInfo;
-                errorInfo = ts.chainDiagnosticMessages(errorInfo, message, arg0, arg1, arg2);
-                if (headMessage) {
-                    errorInfo = ts.chainDiagnosticMessages(errorInfo, headMessage);
-                }
-                diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(node, errorInfo));
+        }
+        // Check that a parameter initializer contains no references to parameters declared to the right of itself
+        function checkParameterInitializer(node) {
+            if (ts.getRootDeclaration(node).kind !== 146 /* Parameter */) {
+                return;
             }
-            function chooseOverload(candidates, relation, signatureHelpTrailingComma) {
-                if (signatureHelpTrailingComma === void 0) { signatureHelpTrailingComma = false; }
-                for (var _i = 0, candidates_2 = candidates; _i < candidates_2.length; _i++) {
-                    var originalCandidate = candidates_2[_i];
-                    if (!hasCorrectArity(node, args, originalCandidate, signatureHelpTrailingComma)) {
-                        continue;
-                    }
-                    var candidate = void 0;
-                    var typeArgumentsAreValid = void 0;
-                    var inferenceContext = originalCandidate.typeParameters
-                        ? createInferenceContext(originalCandidate, /*inferUnionTypes*/ false)
-                        : undefined;
-                    while (true) {
-                        candidate = originalCandidate;
-                        if (candidate.typeParameters) {
-                            var typeArgumentTypes = void 0;
-                            if (typeArguments) {
-                                typeArgumentTypes = ts.map(typeArguments, getTypeFromTypeNodeNoAlias);
-                                typeArgumentsAreValid = checkTypeArguments(candidate, typeArguments, typeArgumentTypes, /*reportErrors*/ false);
-                            }
-                            else {
-                                inferTypeArguments(node, candidate, args, excludeArgument, inferenceContext);
-                                typeArgumentsAreValid = inferenceContext.failedTypeParameterIndex === undefined;
-                                typeArgumentTypes = inferenceContext.inferredTypes;
-                            }
-                            if (!typeArgumentsAreValid) {
-                                break;
-                            }
-                            candidate = getSignatureInstantiation(candidate, typeArgumentTypes);
-                        }
-                        if (!checkApplicableSignature(node, args, candidate, relation, excludeArgument, /*reportErrors*/ false)) {
-                            break;
-                        }
-                        var index = excludeArgument ? ts.indexOf(excludeArgument, true) : -1;
-                        if (index < 0) {
-                            return candidate;
-                        }
-                        excludeArgument[index] = false;
+            var func = ts.getContainingFunction(node);
+            visit(node.initializer);
+            function visit(n) {
+                if (ts.isTypeNode(n) || ts.isDeclarationName(n)) {
+                    // do not dive in types
+                    // skip declaration names (i.e. in object literal expressions)
+                    return;
+                }
+                if (n.kind === 179 /* PropertyAccessExpression */) {
+                    // skip property names in property access expression
+                    return visit(n.expression);
+                }
+                else if (n.kind === 71 /* Identifier */) {
+                    // check FunctionLikeDeclaration.locals (stores parameters\function local variable)
+                    // if it contains entry with a specified name
+                    var symbol = resolveName(n, n.text, 107455 /* Value */ | 8388608 /* Alias */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined);
+                    if (!symbol || symbol === unknownSymbol || !symbol.valueDeclaration) {
+                        return;
                     }
-                    // A post-mortem of this iteration of the loop. The signature was not applicable,
-                    // so we want to track it as a candidate for reporting an error. If the candidate
-                    // had no type parameters, or had no issues related to type arguments, we can
-                    // report an error based on the arguments. If there was an issue with type
-                    // arguments, then we can only report an error based on the type arguments.
-                    if (originalCandidate.typeParameters) {
-                        var instantiatedCandidate = candidate;
-                        if (typeArgumentsAreValid) {
-                            candidateForArgumentError = instantiatedCandidate;
-                        }
-                        else {
-                            candidateForTypeArgumentError = originalCandidate;
-                            if (!typeArguments) {
-                                resultOfFailedInference = inferenceContext;
+                    if (symbol.valueDeclaration === node) {
+                        error(n, ts.Diagnostics.Parameter_0_cannot_be_referenced_in_its_initializer, ts.declarationNameToString(node.name));
+                        return;
+                    }
+                    // locals map for function contain both parameters and function locals
+                    // so we need to do a bit of extra work to check if reference is legal
+                    var enclosingContainer = ts.getEnclosingBlockScopeContainer(symbol.valueDeclaration);
+                    if (enclosingContainer === func) {
+                        if (symbol.valueDeclaration.kind === 146 /* Parameter */ ||
+                            symbol.valueDeclaration.kind === 176 /* BindingElement */) {
+                            // it is ok to reference parameter in initializer if either
+                            // - parameter is located strictly on the left of current parameter declaration
+                            if (symbol.valueDeclaration.pos < node.pos) {
+                                return;
+                            }
+                            // - parameter is wrapped in function-like entity
+                            if (ts.findAncestor(n, function (current) {
+                                if (current === node.initializer) {
+                                    return "quit";
+                                }
+                                return ts.isFunctionLike(current.parent) ||
+                                    // computed property names/initializers in instance property declaration of class like entities
+                                    // are executed in constructor and thus deferred
+                                    (current.parent.kind === 149 /* PropertyDeclaration */ &&
+                                        !(ts.hasModifier(current.parent, 32 /* Static */)) &&
+                                        ts.isClassLike(current.parent.parent));
+                            })) {
+                                return;
                             }
+                            // fall through to report error
                         }
-                    }
-                    else {
-                        ts.Debug.assert(originalCandidate === candidate);
-                        candidateForArgumentError = originalCandidate;
+                        error(n, ts.Diagnostics.Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it, ts.declarationNameToString(node.name), ts.declarationNameToString(n));
                     }
                 }
-                return undefined;
+                else {
+                    return ts.forEachChild(n, visit);
+                }
             }
         }
-        function resolveCallExpression(node, candidatesOutArray) {
-            if (node.expression.kind === 95 /* SuperKeyword */) {
-                var superType = checkSuperExpression(node.expression);
-                if (superType !== unknownType) {
-                    // In super call, the candidate signatures are the matching arity signatures of the base constructor function instantiated
-                    // with the type arguments specified in the extends clause.
-                    var baseTypeNode = ts.getClassExtendsHeritageClauseElement(ts.getContainingClass(node));
-                    if (baseTypeNode) {
-                        var baseConstructors = getInstantiatedConstructorsForTypeArguments(superType, baseTypeNode.typeArguments);
-                        return resolveCall(node, baseConstructors, candidatesOutArray);
-                    }
+        function convertAutoToAny(type) {
+            return type === autoType ? anyType : type === autoArrayType ? anyArrayType : type;
+        }
+        // Check variable, parameter, or property declaration
+        function checkVariableLikeDeclaration(node) {
+            checkDecorators(node);
+            checkSourceElement(node.type);
+            // For a computed property, just check the initializer and exit
+            // Do not use hasDynamicName here, because that returns false for well known symbols.
+            // We want to perform checkComputedPropertyName for all computed properties, including
+            // well known symbols.
+            if (node.name.kind === 144 /* ComputedPropertyName */) {
+                checkComputedPropertyName(node.name);
+                if (node.initializer) {
+                    checkExpressionCached(node.initializer);
                 }
-                return resolveUntypedCall(node);
-            }
-            var funcType = checkNonNullExpression(node.expression);
-            if (funcType === silentNeverType) {
-                return silentNeverSignature;
-            }
-            var apparentType = getApparentType(funcType);
-            if (apparentType === unknownType) {
-                // Another error has already been reported
-                return resolveErrorCall(node);
             }
-            // Technically, this signatures list may be incomplete. We are taking the apparent type,
-            // but we are not including call signatures that may have been added to the Object or
-            // Function interface, since they have none by default. This is a bit of a leap of faith
-            // that the user will not add any.
-            var callSignatures = getSignaturesOfType(apparentType, 0 /* Call */);
-            var constructSignatures = getSignaturesOfType(apparentType, 1 /* Construct */);
-            // TS 1.0 Spec: 4.12
-            // In an untyped function call no TypeArgs are permitted, Args can be any argument list, no contextual
-            // types are provided for the argument expressions, and the result is always of type Any.
-            if (isUntypedFunctionCall(funcType, apparentType, callSignatures.length, constructSignatures.length)) {
-                // The unknownType indicates that an error already occurred (and was reported).  No
-                // need to report another error in this case.
-                if (funcType !== unknownType && node.typeArguments) {
-                    error(node, ts.Diagnostics.Untyped_function_calls_may_not_accept_type_arguments);
+            if (node.kind === 176 /* BindingElement */) {
+                if (node.parent.kind === 174 /* ObjectBindingPattern */ && languageVersion < 5 /* ESNext */) {
+                    checkExternalEmitHelpers(node, 4 /* Rest */);
                 }
-                return resolveUntypedCall(node);
-            }
-            // If FuncExpr's apparent type(section 3.8.1) is a function type, the call is a typed function call.
-            // TypeScript employs overload resolution in typed function calls in order to support functions
-            // with multiple call signatures.
-            if (!callSignatures.length) {
-                if (constructSignatures.length) {
-                    error(node, ts.Diagnostics.Value_of_type_0_is_not_callable_Did_you_mean_to_include_new, typeToString(funcType));
+                // check computed properties inside property names of binding elements
+                if (node.propertyName && node.propertyName.kind === 144 /* ComputedPropertyName */) {
+                    checkComputedPropertyName(node.propertyName);
                 }
-                else {
-                    error(node, ts.Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures, typeToString(apparentType));
+                // check private/protected variable access
+                var parent_14 = node.parent.parent;
+                var parentType = getTypeForBindingElementParent(parent_14);
+                var name_29 = node.propertyName || node.name;
+                var property = getPropertyOfType(parentType, ts.getTextOfPropertyName(name_29));
+                markPropertyAsReferenced(property);
+                if (parent_14.initializer && property) {
+                    checkPropertyAccessibility(parent_14, parent_14.initializer, parentType, property);
                 }
-                return resolveErrorCall(node);
             }
-            return resolveCall(node, callSignatures, candidatesOutArray);
-        }
-        /**
-         * TS 1.0 spec: 4.12
-         * If FuncExpr is of type Any, or of an object type that has no call or construct signatures
-         * but is a subtype of the Function interface, the call is an untyped function call.
-         */
-        function isUntypedFunctionCall(funcType, apparentFuncType, numCallSignatures, numConstructSignatures) {
-            if (isTypeAny(funcType)) {
-                return true;
+            // For a binding pattern, check contained binding elements
+            if (ts.isBindingPattern(node.name)) {
+                if (node.name.kind === 175 /* ArrayBindingPattern */ && languageVersion < 2 /* ES2015 */ && compilerOptions.downlevelIteration) {
+                    checkExternalEmitHelpers(node, 512 /* Read */);
+                }
+                ts.forEach(node.name.elements, checkSourceElement);
             }
-            if (isTypeAny(apparentFuncType) && funcType.flags & 16384 /* TypeParameter */) {
-                return true;
+            // For a parameter declaration with an initializer, error and exit if the containing function doesn't have a body
+            if (node.initializer && ts.getRootDeclaration(node).kind === 146 /* Parameter */ && ts.nodeIsMissing(ts.getContainingFunction(node).body)) {
+                error(node, ts.Diagnostics.A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation);
+                return;
             }
-            if (!numCallSignatures && !numConstructSignatures) {
-                // We exclude union types because we may have a union of function types that happen to have
-                // no common signatures.
-                if (funcType.flags & 524288 /* Union */) {
-                    return false;
+            // For a binding pattern, validate the initializer and exit
+            if (ts.isBindingPattern(node.name)) {
+                // Don't validate for-in initializer as it is already an error
+                if (node.initializer && node.parent.parent.kind !== 215 /* ForInStatement */) {
+                    checkTypeAssignableTo(checkExpressionCached(node.initializer), getWidenedTypeForVariableLikeDeclaration(node), node, /*headMessage*/ undefined);
+                    checkParameterInitializer(node);
                 }
-                return isTypeAssignableTo(funcType, globalFunctionType);
+                return;
             }
-            return false;
-        }
-        function resolveNewExpression(node, candidatesOutArray) {
-            if (node.arguments && languageVersion < 1 /* ES5 */) {
-                var spreadIndex = getSpreadArgumentIndex(node.arguments);
-                if (spreadIndex >= 0) {
-                    error(node.arguments[spreadIndex], ts.Diagnostics.Spread_operator_in_new_expressions_is_only_available_when_targeting_ECMAScript_5_and_higher);
+            var symbol = getSymbolOfNode(node);
+            var type = convertAutoToAny(getTypeOfVariableOrParameterOrProperty(symbol));
+            if (node === symbol.valueDeclaration) {
+                // Node is the primary declaration of the symbol, just validate the initializer
+                // Don't validate for-in initializer as it is already an error
+                if (node.initializer && node.parent.parent.kind !== 215 /* ForInStatement */) {
+                    checkTypeAssignableTo(checkExpressionCached(node.initializer), type, node, /*headMessage*/ undefined);
+                    checkParameterInitializer(node);
                 }
             }
-            var expressionType = checkNonNullExpression(node.expression);
-            if (expressionType === silentNeverType) {
-                return silentNeverSignature;
-            }
-            // If expressionType's apparent type(section 3.8.1) is an object type with one or
-            // more construct signatures, the expression is processed in the same manner as a
-            // function call, but using the construct signatures as the initial set of candidate
-            // signatures for overload resolution. The result type of the function call becomes
-            // the result type of the operation.
-            expressionType = getApparentType(expressionType);
-            if (expressionType === unknownType) {
-                // Another error has already been reported
-                return resolveErrorCall(node);
-            }
-            // If the expression is a class of abstract type, then it cannot be instantiated.
-            // Note, only class declarations can be declared abstract.
-            // In the case of a merged class-module or class-interface declaration,
-            // only the class declaration node will have the Abstract flag set.
-            var valueDecl = expressionType.symbol && getClassLikeDeclarationOfSymbol(expressionType.symbol);
-            if (valueDecl && ts.getModifierFlags(valueDecl) & 128 /* Abstract */) {
-                error(node, ts.Diagnostics.Cannot_create_an_instance_of_the_abstract_class_0, ts.declarationNameToString(valueDecl.name));
-                return resolveErrorCall(node);
-            }
-            // TS 1.0 spec: 4.11
-            // If expressionType is of type Any, Args can be any argument
-            // list and the result of the operation is of type Any.
-            if (isTypeAny(expressionType)) {
-                if (node.typeArguments) {
-                    error(node, ts.Diagnostics.Untyped_function_calls_may_not_accept_type_arguments);
+            else {
+                // Node is a secondary declaration, check that type is identical to primary declaration and check that
+                // initializer is consistent with type associated with the node
+                var declarationType = convertAutoToAny(getWidenedTypeForVariableLikeDeclaration(node));
+                if (type !== unknownType && declarationType !== unknownType && !isTypeIdenticalTo(type, declarationType)) {
+                    error(node.name, ts.Diagnostics.Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_type_2, ts.declarationNameToString(node.name), typeToString(type), typeToString(declarationType));
                 }
-                return resolveUntypedCall(node);
-            }
-            // Technically, this signatures list may be incomplete. We are taking the apparent type,
-            // but we are not including construct signatures that may have been added to the Object or
-            // Function interface, since they have none by default. This is a bit of a leap of faith
-            // that the user will not add any.
-            var constructSignatures = getSignaturesOfType(expressionType, 1 /* Construct */);
-            if (constructSignatures.length) {
-                if (!isConstructorAccessible(node, constructSignatures[0])) {
-                    return resolveErrorCall(node);
+                if (node.initializer) {
+                    checkTypeAssignableTo(checkExpressionCached(node.initializer), declarationType, node, /*headMessage*/ undefined);
                 }
-                return resolveCall(node, constructSignatures, candidatesOutArray);
-            }
-            // If expressionType's apparent type is an object type with no construct signatures but
-            // one or more call signatures, the expression is processed as a function call. A compile-time
-            // error occurs if the result of the function call is not Void. The type of the result of the
-            // operation is Any. It is an error to have a Void this type.
-            var callSignatures = getSignaturesOfType(expressionType, 0 /* Call */);
-            if (callSignatures.length) {
-                var signature = resolveCall(node, callSignatures, candidatesOutArray);
-                if (getReturnTypeOfSignature(signature) !== voidType) {
-                    error(node, ts.Diagnostics.Only_a_void_function_can_be_called_with_the_new_keyword);
+                if (!areDeclarationFlagsIdentical(node, symbol.valueDeclaration)) {
+                    error(ts.getNameOfDeclaration(symbol.valueDeclaration), ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
+                    error(node.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
                 }
-                if (getThisTypeOfSignature(signature) === voidType) {
-                    error(node, ts.Diagnostics.A_function_that_is_called_with_the_new_keyword_cannot_have_a_this_type_that_is_void);
+            }
+            if (node.kind !== 149 /* PropertyDeclaration */ && node.kind !== 148 /* PropertySignature */) {
+                // We know we don't have a binding pattern or computed name here
+                checkExportsOnMergedDeclarations(node);
+                if (node.kind === 226 /* VariableDeclaration */ || node.kind === 176 /* BindingElement */) {
+                    checkVarDeclaredNamesNotShadowed(node);
                 }
-                return signature;
+                checkCollisionWithCapturedSuperVariable(node, node.name);
+                checkCollisionWithCapturedThisVariable(node, node.name);
+                checkCollisionWithCapturedNewTargetVariable(node, node.name);
+                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
+                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
             }
-            error(node, ts.Diagnostics.Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature);
-            return resolveErrorCall(node);
         }
-        function isConstructorAccessible(node, signature) {
-            if (!signature || !signature.declaration) {
-                return true;
-            }
-            var declaration = signature.declaration;
-            var modifiers = ts.getModifierFlags(declaration);
-            // Public constructor is accessible.
-            if (!(modifiers & 24 /* NonPublicAccessibilityModifier */)) {
+        function areDeclarationFlagsIdentical(left, right) {
+            if ((left.kind === 146 /* Parameter */ && right.kind === 226 /* VariableDeclaration */) ||
+                (left.kind === 226 /* VariableDeclaration */ && right.kind === 146 /* Parameter */)) {
+                // Differences in optionality between parameters and variables are allowed.
                 return true;
             }
-            var declaringClassDeclaration = getClassLikeDeclarationOfSymbol(declaration.parent.symbol);
-            var declaringClass = getDeclaredTypeOfSymbol(declaration.parent.symbol);
-            // A private or protected constructor can only be instantiated within its own class (or a subclass, for protected)
-            if (!isNodeWithinClass(node, declaringClassDeclaration)) {
-                var containingClass = ts.getContainingClass(node);
-                if (containingClass) {
-                    var containingType = getTypeOfNode(containingClass);
-                    var baseTypes = getBaseTypes(containingType);
-                    if (baseTypes.length) {
-                        var baseType = baseTypes[0];
-                        if (modifiers & 16 /* Protected */ &&
-                            baseType.symbol === declaration.parent.symbol) {
-                            return true;
-                        }
-                    }
-                }
-                if (modifiers & 8 /* Private */) {
-                    error(node, ts.Diagnostics.Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration, typeToString(declaringClass));
-                }
-                if (modifiers & 16 /* Protected */) {
-                    error(node, ts.Diagnostics.Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration, typeToString(declaringClass));
-                }
+            if (ts.hasQuestionToken(left) !== ts.hasQuestionToken(right)) {
                 return false;
             }
-            return true;
-        }
-        function resolveTaggedTemplateExpression(node, candidatesOutArray) {
-            var tagType = checkExpression(node.tag);
-            var apparentType = getApparentType(tagType);
-            if (apparentType === unknownType) {
-                // Another error has already been reported
-                return resolveErrorCall(node);
-            }
-            var callSignatures = getSignaturesOfType(apparentType, 0 /* Call */);
-            var constructSignatures = getSignaturesOfType(apparentType, 1 /* Construct */);
-            if (isUntypedFunctionCall(tagType, apparentType, callSignatures.length, constructSignatures.length)) {
-                return resolveUntypedCall(node);
-            }
-            if (!callSignatures.length) {
-                error(node, ts.Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures, typeToString(apparentType));
-                return resolveErrorCall(node);
-            }
-            return resolveCall(node, callSignatures, candidatesOutArray);
-        }
-        /**
-          * Gets the localized diagnostic head message to use for errors when resolving a decorator as a call expression.
-          */
-        function getDiagnosticHeadMessageForDecoratorResolution(node) {
-            switch (node.parent.kind) {
-                case 221 /* ClassDeclaration */:
-                case 192 /* ClassExpression */:
-                    return ts.Diagnostics.Unable_to_resolve_signature_of_class_decorator_when_called_as_an_expression;
-                case 142 /* Parameter */:
-                    return ts.Diagnostics.Unable_to_resolve_signature_of_parameter_decorator_when_called_as_an_expression;
-                case 145 /* PropertyDeclaration */:
-                    return ts.Diagnostics.Unable_to_resolve_signature_of_property_decorator_when_called_as_an_expression;
-                case 147 /* MethodDeclaration */:
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                    return ts.Diagnostics.Unable_to_resolve_signature_of_method_decorator_when_called_as_an_expression;
-            }
-        }
-        /**
-          * Resolves a decorator as if it were a call expression.
-          */
-        function resolveDecorator(node, candidatesOutArray) {
-            var funcType = checkExpression(node.expression);
-            var apparentType = getApparentType(funcType);
-            if (apparentType === unknownType) {
-                return resolveErrorCall(node);
-            }
-            var callSignatures = getSignaturesOfType(apparentType, 0 /* Call */);
-            var constructSignatures = getSignaturesOfType(apparentType, 1 /* Construct */);
-            if (isUntypedFunctionCall(funcType, apparentType, callSignatures.length, constructSignatures.length)) {
-                return resolveUntypedCall(node);
-            }
-            var headMessage = getDiagnosticHeadMessageForDecoratorResolution(node);
-            if (!callSignatures.length) {
-                var errorInfo = void 0;
-                errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures, typeToString(apparentType));
-                errorInfo = ts.chainDiagnosticMessages(errorInfo, headMessage);
-                diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(node, errorInfo));
-                return resolveErrorCall(node);
-            }
-            return resolveCall(node, callSignatures, candidatesOutArray, headMessage);
-        }
-        function resolveSignature(node, candidatesOutArray) {
-            switch (node.kind) {
-                case 174 /* CallExpression */:
-                    return resolveCallExpression(node, candidatesOutArray);
-                case 175 /* NewExpression */:
-                    return resolveNewExpression(node, candidatesOutArray);
-                case 176 /* TaggedTemplateExpression */:
-                    return resolveTaggedTemplateExpression(node, candidatesOutArray);
-                case 143 /* Decorator */:
-                    return resolveDecorator(node, candidatesOutArray);
-            }
-            ts.Debug.fail("Branch in 'resolveSignature' should be unreachable.");
+            var interestingFlags = 8 /* Private */ |
+                16 /* Protected */ |
+                256 /* Async */ |
+                128 /* Abstract */ |
+                64 /* Readonly */ |
+                32 /* Static */;
+            return (ts.getModifierFlags(left) & interestingFlags) === (ts.getModifierFlags(right) & interestingFlags);
         }
-        // candidatesOutArray is passed by signature help in the language service, and collectCandidates
-        // must fill it up with the appropriate candidate signatures
-        function getResolvedSignature(node, candidatesOutArray) {
-            var links = getNodeLinks(node);
-            // If getResolvedSignature has already been called, we will have cached the resolvedSignature.
-            // However, it is possible that either candidatesOutArray was not passed in the first time,
-            // or that a different candidatesOutArray was passed in. Therefore, we need to redo the work
-            // to correctly fill the candidatesOutArray.
-            var cached = links.resolvedSignature;
-            if (cached && cached !== resolvingSignature && !candidatesOutArray) {
-                return cached;
-            }
-            links.resolvedSignature = resolvingSignature;
-            var result = resolveSignature(node, candidatesOutArray);
-            // If signature resolution originated in control flow type analysis (for example to compute the
-            // assigned type in a flow assignment) we don't cache the result as it may be based on temporary
-            // types from the control flow analysis.
-            links.resolvedSignature = flowLoopStart === flowLoopCount ? result : cached;
-            return result;
+        function checkVariableDeclaration(node) {
+            checkGrammarVariableDeclaration(node);
+            return checkVariableLikeDeclaration(node);
         }
-        function getResolvedOrAnySignature(node) {
-            // If we're already in the process of resolving the given signature, don't resolve again as
-            // that could cause infinite recursion. Instead, return anySignature.
-            return getNodeLinks(node).resolvedSignature === resolvingSignature ? resolvingSignature : getResolvedSignature(node);
+        function checkBindingElement(node) {
+            checkGrammarBindingElement(node);
+            return checkVariableLikeDeclaration(node);
         }
-        function getInferredClassType(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.inferredClassType) {
-                links.inferredClassType = createAnonymousType(symbol, symbol.members, emptyArray, emptyArray, /*stringIndexType*/ undefined, /*numberIndexType*/ undefined);
-            }
-            return links.inferredClassType;
+        function checkVariableStatement(node) {
+            // Grammar checking
+            checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarVariableDeclarationList(node.declarationList) || checkGrammarForDisallowedLetOrConstStatement(node);
+            ts.forEach(node.declarationList.declarations, checkSourceElement);
         }
-        /**
-         * Syntactically and semantically checks a call or new expression.
-         * @param node The call/new expression to be checked.
-         * @returns On success, the expression's signature's return type. On failure, anyType.
-         */
-        function checkCallExpression(node) {
-            // Grammar checking; stop grammar-checking if checkGrammarTypeArguments return true
-            checkGrammarTypeArguments(node, node.typeArguments) || checkGrammarArguments(node, node.arguments);
-            var signature = getResolvedSignature(node);
-            if (node.expression.kind === 95 /* SuperKeyword */) {
-                return voidType;
-            }
-            if (node.kind === 175 /* NewExpression */) {
-                var declaration = signature.declaration;
-                if (declaration &&
-                    declaration.kind !== 148 /* Constructor */ &&
-                    declaration.kind !== 152 /* ConstructSignature */ &&
-                    declaration.kind !== 157 /* ConstructorType */ &&
-                    !ts.isJSDocConstructSignature(declaration)) {
-                    // When resolved signature is a call signature (and not a construct signature) the result type is any, unless
-                    // the declaring function had members created through 'x.prototype.y = expr' or 'this.y = expr' psuedodeclarations
-                    // in a JS file
-                    // Note:JS inferred classes might come from a variable declaration instead of a function declaration.
-                    // In this case, using getResolvedSymbol directly is required to avoid losing the members from the declaration.
-                    var funcSymbol = node.expression.kind === 69 /* Identifier */ ?
-                        getResolvedSymbol(node.expression) :
-                        checkExpression(node.expression).symbol;
-                    if (funcSymbol && funcSymbol.members && (funcSymbol.flags & 16 /* Function */ || ts.isDeclarationOfFunctionExpression(funcSymbol))) {
-                        return getInferredClassType(funcSymbol);
-                    }
-                    else if (compilerOptions.noImplicitAny) {
-                        error(node, ts.Diagnostics.new_expression_whose_target_lacks_a_construct_signature_implicitly_has_an_any_type);
+        function checkGrammarDisallowedModifiersOnObjectLiteralExpressionMethod(node) {
+            // We only disallow modifier on a method declaration if it is a property of object-literal-expression
+            if (node.modifiers && node.parent.kind === 178 /* ObjectLiteralExpression */) {
+                if (ts.getFunctionFlags(node) & 2 /* Async */) {
+                    if (node.modifiers.length > 1) {
+                        return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
                     }
-                    return anyType;
                 }
-            }
-            // In JavaScript files, calls to any identifier 'require' are treated as external module imports
-            if (ts.isInJavaScriptFile(node) && ts.isRequireCall(node, /*checkArgumentIsStringLiteral*/ true)) {
-                return resolveExternalModuleTypeByLiteral(node.arguments[0]);
-            }
-            return getReturnTypeOfSignature(signature);
-        }
-        function checkTaggedTemplateExpression(node) {
-            return getReturnTypeOfSignature(getResolvedSignature(node));
-        }
-        function checkAssertion(node) {
-            var exprType = getRegularTypeOfObjectLiteral(getBaseTypeOfLiteralType(checkExpression(node.expression)));
-            checkSourceElement(node.type);
-            var targetType = getTypeFromTypeNode(node.type);
-            if (produceDiagnostics && targetType !== unknownType) {
-                var widenedType = getWidenedType(exprType);
-                if (!isTypeComparableTo(targetType, widenedType)) {
-                    checkTypeComparableTo(exprType, targetType, node, ts.Diagnostics.Type_0_cannot_be_converted_to_type_1);
+                else {
+                    return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
                 }
             }
-            return targetType;
         }
-        function checkNonNullAssertion(node) {
-            return getNonNullableType(checkExpression(node.expression));
+        function checkExpressionStatement(node) {
+            // Grammar checking
+            checkGrammarStatementInAmbientContext(node);
+            checkExpression(node.expression);
         }
-        function getTypeOfParameter(symbol) {
-            var type = getTypeOfSymbol(symbol);
-            if (strictNullChecks) {
-                var declaration = symbol.valueDeclaration;
-                if (declaration && declaration.initializer) {
-                    return includeFalsyTypes(type, 2048 /* Undefined */);
-                }
+        function checkIfStatement(node) {
+            // Grammar checking
+            checkGrammarStatementInAmbientContext(node);
+            checkExpression(node.expression);
+            checkSourceElement(node.thenStatement);
+            if (node.thenStatement.kind === 209 /* EmptyStatement */) {
+                error(node.thenStatement, ts.Diagnostics.The_body_of_an_if_statement_cannot_be_the_empty_statement);
             }
-            return type;
+            checkSourceElement(node.elseStatement);
         }
-        function getTypeAtPosition(signature, pos) {
-            return signature.hasRestParameter ?
-                pos < signature.parameters.length - 1 ? getTypeOfParameter(signature.parameters[pos]) : getRestTypeOfSignature(signature) :
-                pos < signature.parameters.length ? getTypeOfParameter(signature.parameters[pos]) : anyType;
+        function checkDoStatement(node) {
+            // Grammar checking
+            checkGrammarStatementInAmbientContext(node);
+            checkSourceElement(node.statement);
+            checkExpression(node.expression);
         }
-        function assignContextualParameterTypes(signature, context, mapper) {
-            var len = signature.parameters.length - (signature.hasRestParameter ? 1 : 0);
-            if (context.thisParameter) {
-                if (!signature.thisParameter) {
-                    signature.thisParameter = createTransientSymbol(context.thisParameter, undefined);
+        function checkWhileStatement(node) {
+            // Grammar checking
+            checkGrammarStatementInAmbientContext(node);
+            checkExpression(node.expression);
+            checkSourceElement(node.statement);
+        }
+        function checkForStatement(node) {
+            // Grammar checking
+            if (!checkGrammarStatementInAmbientContext(node)) {
+                if (node.initializer && node.initializer.kind === 227 /* VariableDeclarationList */) {
+                    checkGrammarVariableDeclarationList(node.initializer);
                 }
-                assignTypeToParameterAndFixTypeParameters(signature.thisParameter, getTypeOfSymbol(context.thisParameter), mapper);
             }
-            for (var i = 0; i < len; i++) {
-                var parameter = signature.parameters[i];
-                var contextualParameterType = getTypeAtPosition(context, i);
-                assignTypeToParameterAndFixTypeParameters(parameter, contextualParameterType, mapper);
+            if (node.initializer) {
+                if (node.initializer.kind === 227 /* VariableDeclarationList */) {
+                    ts.forEach(node.initializer.declarations, checkVariableDeclaration);
+                }
+                else {
+                    checkExpression(node.initializer);
+                }
             }
-            if (signature.hasRestParameter && isRestParameterIndex(context, signature.parameters.length - 1)) {
-                var parameter = ts.lastOrUndefined(signature.parameters);
-                var contextualParameterType = getTypeOfSymbol(ts.lastOrUndefined(context.parameters));
-                assignTypeToParameterAndFixTypeParameters(parameter, contextualParameterType, mapper);
+            if (node.condition)
+                checkExpression(node.condition);
+            if (node.incrementor)
+                checkExpression(node.incrementor);
+            checkSourceElement(node.statement);
+            if (node.locals) {
+                registerForUnusedIdentifiersCheck(node);
             }
         }
-        // When contextual typing assigns a type to a parameter that contains a binding pattern, we also need to push
-        // the destructured type into the contained binding elements.
-        function assignBindingElementTypes(node) {
-            if (ts.isBindingPattern(node.name)) {
-                for (var _i = 0, _a = node.name.elements; _i < _a.length; _i++) {
-                    var element = _a[_i];
-                    if (!ts.isOmittedExpression(element)) {
-                        if (element.name.kind === 69 /* Identifier */) {
-                            getSymbolLinks(getSymbolOfNode(element)).type = getTypeForBindingElement(element);
-                        }
-                        assignBindingElementTypes(element);
+        function checkForOfStatement(node) {
+            checkGrammarForInOrForOfStatement(node);
+            if (node.kind === 216 /* ForOfStatement */) {
+                if (node.awaitModifier) {
+                    var functionFlags = ts.getFunctionFlags(ts.getContainingFunction(node));
+                    if ((functionFlags & (4 /* Invalid */ | 2 /* Async */)) === 2 /* Async */ && languageVersion < 5 /* ESNext */) {
+                        // for..await..of in an async function or async generator function prior to ESNext requires the __asyncValues helper
+                        checkExternalEmitHelpers(node, 16384 /* ForAwaitOfIncludes */);
                     }
                 }
-            }
-        }
-        function assignTypeToParameterAndFixTypeParameters(parameter, contextualType, mapper) {
-            var links = getSymbolLinks(parameter);
-            if (!links.type) {
-                links.type = instantiateType(contextualType, mapper);
-                // if inference didn't come up with anything but {}, fall back to the binding pattern if present.
-                if (links.type === emptyObjectType &&
-                    (parameter.valueDeclaration.name.kind === 167 /* ObjectBindingPattern */ ||
-                        parameter.valueDeclaration.name.kind === 168 /* ArrayBindingPattern */)) {
-                    links.type = getTypeFromBindingPattern(parameter.valueDeclaration.name);
+                else if (compilerOptions.downlevelIteration && languageVersion < 2 /* ES2015 */) {
+                    // for..of prior to ES2015 requires the __values helper when downlevelIteration is enabled
+                    checkExternalEmitHelpers(node, 256 /* ForOfIncludes */);
                 }
-                assignBindingElementTypes(parameter.valueDeclaration);
-            }
-            else if (isInferentialContext(mapper)) {
-                // Even if the parameter already has a type, it might be because it was given a type while
-                // processing the function as an argument to a prior signature during overload resolution.
-                // If this was the case, it may have caused some type parameters to be fixed. So here,
-                // we need to ensure that type parameters at the same positions get fixed again. This is
-                // done by calling instantiateType to attach the mapper to the contextualType, and then
-                // calling inferTypes to force a walk of contextualType so that all the correct fixing
-                // happens. The choice to pass in links.type may seem kind of arbitrary, but it serves
-                // to make sure that all the correct positions in contextualType are reached by the walk.
-                // Here is an example:
-                //
-                //      interface Base {
-                //          baseProp;
-                //      }
-                //      interface Derived extends Base {
-                //          toBase(): Base;
-                //      }
-                //
-                //      var derived: Derived;
-                //
-                //      declare function foo<T>(x: T, func: (p: T) => T): T;
-                //      declare function foo<T>(x: T, func: (p: T) => T): T;
-                //
-                //      var result = foo(derived, d => d.toBase());
-                //
-                // We are typing d while checking the second overload. But we've already given d
-                // a type (Derived) from the first overload. However, we still want to fix the
-                // T in the second overload so that we do not infer Base as a candidate for T
-                // (inferring Base would make type argument inference inconsistent between the two
-                // overloads).
-                inferTypes(mapper.context, links.type, instantiateType(contextualType, mapper));
             }
-        }
-        function getReturnTypeFromJSDocComment(func) {
-            var returnTag = ts.getJSDocReturnTag(func);
-            if (returnTag && returnTag.typeExpression) {
-                return getTypeFromTypeNode(returnTag.typeExpression.type);
-            }
-            return undefined;
-        }
-        function createPromiseType(promisedType) {
-            // creates a `Promise<T>` type where `T` is the promisedType argument
-            var globalPromiseType = getGlobalPromiseType();
-            if (globalPromiseType !== emptyGenericType) {
-                // if the promised type is itself a promise, get the underlying type; otherwise, fallback to the promised type
-                promisedType = getAwaitedType(promisedType);
-                return createTypeReference(globalPromiseType, [promisedType]);
+            // Check the LHS and RHS
+            // If the LHS is a declaration, just check it as a variable declaration, which will in turn check the RHS
+            // via checkRightHandSideOfForOf.
+            // If the LHS is an expression, check the LHS, as a destructuring assignment or as a reference.
+            // Then check that the RHS is assignable to it.
+            if (node.initializer.kind === 227 /* VariableDeclarationList */) {
+                checkForInOrForOfVariableDeclaration(node);
             }
-            return emptyObjectType;
-        }
-        function createPromiseReturnType(func, promisedType) {
-            var promiseType = createPromiseType(promisedType);
-            if (promiseType === emptyObjectType) {
-                error(func, ts.Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type);
-                return unknownType;
+            else {
+                var varExpr = node.initializer;
+                var iteratedType = checkRightHandSideOfForOf(node.expression, node.awaitModifier);
+                // There may be a destructuring assignment on the left side
+                if (varExpr.kind === 177 /* ArrayLiteralExpression */ || varExpr.kind === 178 /* ObjectLiteralExpression */) {
+                    // iteratedType may be undefined. In this case, we still want to check the structure of
+                    // varExpr, in particular making sure it's a valid LeftHandSideExpression. But we'd like
+                    // to short circuit the type relation checking as much as possible, so we pass the unknownType.
+                    checkDestructuringAssignment(varExpr, iteratedType || unknownType);
+                }
+                else {
+                    var leftType = checkExpression(varExpr);
+                    checkReferenceExpression(varExpr, ts.Diagnostics.The_left_hand_side_of_a_for_of_statement_must_be_a_variable_or_a_property_access);
+                    // iteratedType will be undefined if the rightType was missing properties/signatures
+                    // required to get its iteratedType (like [Symbol.iterator] or next). This may be
+                    // because we accessed properties from anyType, or it may have led to an error inside
+                    // getElementTypeOfIterable.
+                    if (iteratedType) {
+                        checkTypeAssignableTo(iteratedType, leftType, varExpr, /*headMessage*/ undefined);
+                    }
+                }
             }
-            return promiseType;
-        }
-        function getReturnTypeFromBody(func, contextualMapper) {
-            var contextualSignature = getContextualSignatureForFunctionLikeDeclaration(func);
-            if (!func.body) {
-                return unknownType;
+            checkSourceElement(node.statement);
+            if (node.locals) {
+                registerForUnusedIdentifiersCheck(node);
             }
-            var isAsync = ts.isAsyncFunctionLike(func);
-            var type;
-            if (func.body.kind !== 199 /* Block */) {
-                type = checkExpressionCached(func.body, contextualMapper);
-                if (isAsync) {
-                    // From within an async function you can return either a non-promise value or a promise. Any
-                    // Promise/A+ compatible implementation will always assimilate any foreign promise, so the
-                    // return type of the body should be unwrapped to its awaited type, which we will wrap in
-                    // the native Promise<T> type later in this function.
-                    type = checkAwaitedType(type, func, ts.Diagnostics.Return_expression_in_async_function_does_not_have_a_valid_callable_then_member);
+        }
+        function checkForInStatement(node) {
+            // Grammar checking
+            checkGrammarForInOrForOfStatement(node);
+            var rightType = checkNonNullExpression(node.expression);
+            // TypeScript 1.0 spec  (April 2014): 5.4
+            // In a 'for-in' statement of the form
+            // for (let VarDecl in Expr) Statement
+            //   VarDecl must be a variable declaration without a type annotation that declares a variable of type Any,
+            //   and Expr must be an expression of type Any, an object type, or a type parameter type.
+            if (node.initializer.kind === 227 /* VariableDeclarationList */) {
+                var variable = node.initializer.declarations[0];
+                if (variable && ts.isBindingPattern(variable.name)) {
+                    error(variable.name, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern);
                 }
+                checkForInOrForOfVariableDeclaration(node);
             }
             else {
-                var types = void 0;
-                var funcIsGenerator = !!func.asteriskToken;
-                if (funcIsGenerator) {
-                    types = checkAndAggregateYieldOperandTypes(func, contextualMapper);
-                    if (types.length === 0) {
-                        var iterableIteratorAny = createIterableIteratorType(anyType);
-                        if (compilerOptions.noImplicitAny) {
-                            error(func.asteriskToken, ts.Diagnostics.Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_type, typeToString(iterableIteratorAny));
-                        }
-                        return iterableIteratorAny;
-                    }
+                // In a 'for-in' statement of the form
+                // for (Var in Expr) Statement
+                //   Var must be an expression classified as a reference of type Any or the String primitive type,
+                //   and Expr must be an expression of type Any, an object type, or a type parameter type.
+                var varExpr = node.initializer;
+                var leftType = checkExpression(varExpr);
+                if (varExpr.kind === 177 /* ArrayLiteralExpression */ || varExpr.kind === 178 /* ObjectLiteralExpression */) {
+                    error(varExpr, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern);
                 }
-                else {
-                    types = checkAndAggregateReturnExpressionTypes(func, contextualMapper);
-                    if (!types) {
-                        // For an async function, the return type will not be never, but rather a Promise for never.
-                        return isAsync ? createPromiseReturnType(func, neverType) : neverType;
-                    }
-                    if (types.length === 0) {
-                        // For an async function, the return type will not be void, but rather a Promise for void.
-                        return isAsync ? createPromiseReturnType(func, voidType) : voidType;
-                    }
+                else if (!isTypeAssignableTo(getIndexTypeOrString(rightType), leftType)) {
+                    error(varExpr, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any);
                 }
-                // Return a union of the return expression types.
-                type = getUnionType(types, /*subtypeReduction*/ true);
-                if (funcIsGenerator) {
-                    type = createIterableIteratorType(type);
+                else {
+                    // run check only former check succeeded to avoid cascading errors
+                    checkReferenceExpression(varExpr, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_must_be_a_variable_or_a_property_access);
                 }
             }
-            if (!contextualSignature) {
-                reportErrorsFromWidening(func, type);
+            // unknownType is returned i.e. if node.expression is identifier whose name cannot be resolved
+            // in this case error about missing name is already reported - do not report extra one
+            if (!isTypeAnyOrAllConstituentTypesHaveKind(rightType, 32768 /* Object */ | 540672 /* TypeVariable */ | 16777216 /* NonPrimitive */)) {
+                error(node.expression, ts.Diagnostics.The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter);
             }
-            if (isUnitType(type) && !(contextualSignature && isLiteralContextualType(getReturnTypeOfSignature(contextualSignature)))) {
-                type = getWidenedLiteralType(type);
+            checkSourceElement(node.statement);
+            if (node.locals) {
+                registerForUnusedIdentifiersCheck(node);
             }
-            var widenedType = getWidenedType(type);
-            // From within an async function you can return either a non-promise value or a promise. Any
-            // Promise/A+ compatible implementation will always assimilate any foreign promise, so the
-            // return type of the body is awaited type of the body, wrapped in a native Promise<T> type.
-            return isAsync ? createPromiseReturnType(func, widenedType) : widenedType;
-        }
-        function checkAndAggregateYieldOperandTypes(func, contextualMapper) {
-            var aggregatedTypes = [];
-            ts.forEachYieldExpression(func.body, function (yieldExpression) {
-                var expr = yieldExpression.expression;
-                if (expr) {
-                    var type = checkExpressionCached(expr, contextualMapper);
-                    if (yieldExpression.asteriskToken) {
-                        // A yield* expression effectively yields everything that its operand yields
-                        type = checkElementTypeOfIterable(type, yieldExpression.expression);
-                    }
-                    if (!ts.contains(aggregatedTypes, type)) {
-                        aggregatedTypes.push(type);
-                    }
-                }
-            });
-            return aggregatedTypes;
         }
-        function isExhaustiveSwitchStatement(node) {
-            if (!node.possiblyExhaustive) {
-                return false;
-            }
-            var type = checkExpression(node.expression);
-            if (!isLiteralType(type)) {
-                return false;
-            }
-            var switchTypes = getSwitchClauseTypes(node);
-            if (!switchTypes.length) {
-                return false;
+        function checkForInOrForOfVariableDeclaration(iterationStatement) {
+            var variableDeclarationList = iterationStatement.initializer;
+            // checkGrammarForInOrForOfStatement will check that there is exactly one declaration.
+            if (variableDeclarationList.declarations.length >= 1) {
+                var decl = variableDeclarationList.declarations[0];
+                checkVariableDeclaration(decl);
             }
-            return eachTypeContainedIn(type, switchTypes);
         }
-        function functionHasImplicitReturn(func) {
-            if (!(func.flags & 128 /* HasImplicitReturn */)) {
-                return false;
-            }
-            var lastStatement = ts.lastOrUndefined(func.body.statements);
-            if (lastStatement && lastStatement.kind === 213 /* SwitchStatement */ && isExhaustiveSwitchStatement(lastStatement)) {
-                return false;
+        function checkRightHandSideOfForOf(rhsExpression, awaitModifier) {
+            var expressionType = checkNonNullExpression(rhsExpression);
+            return checkIteratedTypeOrElementType(expressionType, rhsExpression, /*allowStringInput*/ true, awaitModifier !== undefined);
+        }
+        function checkIteratedTypeOrElementType(inputType, errorNode, allowStringInput, allowAsyncIterables) {
+            if (isTypeAny(inputType)) {
+                return inputType;
             }
-            return true;
+            return getIteratedTypeOrElementType(inputType, errorNode, allowStringInput, allowAsyncIterables, /*checkAssignability*/ true) || anyType;
         }
-        function checkAndAggregateReturnExpressionTypes(func, contextualMapper) {
-            var isAsync = ts.isAsyncFunctionLike(func);
-            var aggregatedTypes = [];
-            var hasReturnWithNoExpression = functionHasImplicitReturn(func);
-            var hasReturnOfTypeNever = false;
-            ts.forEachReturnStatement(func.body, function (returnStatement) {
-                var expr = returnStatement.expression;
-                if (expr) {
-                    var type = checkExpressionCached(expr, contextualMapper);
-                    if (isAsync) {
-                        // From within an async function you can return either a non-promise value or a promise. Any
-                        // Promise/A+ compatible implementation will always assimilate any foreign promise, so the
-                        // return type of the body should be unwrapped to its awaited type, which should be wrapped in
-                        // the native Promise<T> type by the caller.
-                        type = checkAwaitedType(type, func, ts.Diagnostics.Return_expression_in_async_function_does_not_have_a_valid_callable_then_member);
+        /**
+         * When consuming an iterable type in a for..of, spread, or iterator destructuring assignment
+         * we want to get the iterated type of an iterable for ES2015 or later, or the iterated type
+         * of a iterable (if defined globally) or element type of an array like for ES2015 or earlier.
+         */
+        function getIteratedTypeOrElementType(inputType, errorNode, allowStringInput, allowAsyncIterables, checkAssignability) {
+            var uplevelIteration = languageVersion >= 2 /* ES2015 */;
+            var downlevelIteration = !uplevelIteration && compilerOptions.downlevelIteration;
+            // Get the iterated type of an `Iterable<T>` or `IterableIterator<T>` only in ES2015
+            // or higher, when inside of an async generator or for-await-if, or when
+            // downlevelIteration is requested.
+            if (uplevelIteration || downlevelIteration || allowAsyncIterables) {
+                // We only report errors for an invalid iterable type in ES2015 or higher.
+                var iteratedType = getIteratedTypeOfIterable(inputType, uplevelIteration ? errorNode : undefined, allowAsyncIterables, /*allowSyncIterables*/ true, checkAssignability);
+                if (iteratedType || uplevelIteration) {
+                    return iteratedType;
+                }
+            }
+            var arrayType = inputType;
+            var reportedError = false;
+            var hasStringConstituent = false;
+            // If strings are permitted, remove any string-like constituents from the array type.
+            // This allows us to find other non-string element types from an array unioned with
+            // a string.
+            if (allowStringInput) {
+                if (arrayType.flags & 65536 /* Union */) {
+                    // After we remove all types that are StringLike, we will know if there was a string constituent
+                    // based on whether the result of filter is a new array.
+                    var arrayTypes = inputType.types;
+                    var filteredTypes = ts.filter(arrayTypes, function (t) { return !(t.flags & 262178 /* StringLike */); });
+                    if (filteredTypes !== arrayTypes) {
+                        arrayType = getUnionType(filteredTypes, /*subtypeReduction*/ true);
                     }
-                    if (type.flags & 8192 /* Never */) {
-                        hasReturnOfTypeNever = true;
+                }
+                else if (arrayType.flags & 262178 /* StringLike */) {
+                    arrayType = neverType;
+                }
+                hasStringConstituent = arrayType !== inputType;
+                if (hasStringConstituent) {
+                    if (languageVersion < 1 /* ES5 */) {
+                        if (errorNode) {
+                            error(errorNode, ts.Diagnostics.Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher);
+                            reportedError = true;
+                        }
                     }
-                    else if (!ts.contains(aggregatedTypes, type)) {
-                        aggregatedTypes.push(type);
+                    // Now that we've removed all the StringLike types, if no constituents remain, then the entire
+                    // arrayOrStringType was a string.
+                    if (arrayType.flags & 8192 /* Never */) {
+                        return stringType;
                     }
                 }
-                else {
-                    hasReturnWithNoExpression = true;
+            }
+            if (!isArrayLikeType(arrayType)) {
+                if (errorNode && !reportedError) {
+                    // Which error we report depends on whether we allow strings or if there was a
+                    // string constituent. For example, if the input type is number | string, we
+                    // want to say that number is not an array type. But if the input was just
+                    // number and string input is allowed, we want to say that number is not an
+                    // array type or a string type.
+                    var diagnostic = !allowStringInput || hasStringConstituent
+                        ? downlevelIteration
+                            ? ts.Diagnostics.Type_0_is_not_an_array_type_or_does_not_have_a_Symbol_iterator_method_that_returns_an_iterator
+                            : ts.Diagnostics.Type_0_is_not_an_array_type
+                        : downlevelIteration
+                            ? ts.Diagnostics.Type_0_is_not_an_array_type_or_a_string_type_or_does_not_have_a_Symbol_iterator_method_that_returns_an_iterator
+                            : ts.Diagnostics.Type_0_is_not_an_array_type_or_a_string_type;
+                    error(errorNode, diagnostic, typeToString(arrayType));
                 }
-            });
-            if (aggregatedTypes.length === 0 && !hasReturnWithNoExpression && (hasReturnOfTypeNever ||
-                func.kind === 179 /* FunctionExpression */ || func.kind === 180 /* ArrowFunction */)) {
-                return undefined;
+                return hasStringConstituent ? stringType : undefined;
             }
-            if (strictNullChecks && aggregatedTypes.length && hasReturnWithNoExpression) {
-                if (!ts.contains(aggregatedTypes, undefinedType)) {
-                    aggregatedTypes.push(undefinedType);
+            var arrayElementType = getIndexTypeOfType(arrayType, 1 /* Number */);
+            if (hasStringConstituent && arrayElementType) {
+                // This is just an optimization for the case where arrayOrStringType is string | string[]
+                if (arrayElementType.flags & 262178 /* StringLike */) {
+                    return stringType;
                 }
+                return getUnionType([arrayElementType, stringType], /*subtypeReduction*/ true);
             }
-            return aggregatedTypes;
+            return arrayElementType;
         }
         /**
-         * TypeScript Specification 1.0 (6.3) - July 2014
-         *   An explicitly typed function whose return type isn't the Void type,
-         *   the Any type, or a union type containing the Void or Any type as a constituent
-         *   must have at least one return statement somewhere in its body.
-         *   An exception to this rule is if the function implementation consists of a single 'throw' statement.
+         * We want to treat type as an iterable, and get the type it is an iterable of. The iterable
+         * must have the following structure (annotated with the names of the variables below):
          *
-         * @param returnType - return type of the function, can be undefined if return type is not explicitly specified
+         *     { // iterable
+         *         [Symbol.iterator]: { // iteratorMethod
+         *             (): Iterator<T>
+         *         }
+         *     }
+         *
+         * For an async iterable, we expect the following structure:
+         *
+         *     { // iterable
+         *         [Symbol.asyncIterator]: { // iteratorMethod
+         *             (): AsyncIterator<T>
+         *         }
+         *     }
+         *
+         * T is the type we are after. At every level that involves analyzing return types
+         * of signatures, we union the return types of all the signatures.
+         *
+         * Another thing to note is that at any step of this process, we could run into a dead end,
+         * meaning either the property is missing, or we run into the anyType. If either of these things
+         * happens, we return undefined to signal that we could not find the iterated type. If a property
+         * is missing, and the previous step did not result in 'any', then we also give an error if the
+         * caller requested it. Then the caller can decide what to do in the case where there is no iterated
+         * type. This is different from returning anyType, because that would signify that we have matched the
+         * whole pattern and that T (above) is 'any'.
+         *
+         * For a **for-of** statement, `yield*` (in a normal generator), spread, array
+         * destructuring, or normal generator we will only ever look for a `[Symbol.iterator]()`
+         * method.
+         *
+         * For an async generator we will only ever look at the `[Symbol.asyncIterator]()` method.
+         *
+         * For a **for-await-of** statement or a `yield*` in an async generator we will look for
+         * the `[Symbol.asyncIterator]()` method first, and then the `[Symbol.iterator]()` method.
          */
-        function checkAllCodePathsInNonVoidFunctionReturnOrThrow(func, returnType) {
-            if (!produceDiagnostics) {
-                return;
-            }
-            // Functions with with an explicitly specified 'void' or 'any' return type don't need any return expressions.
-            if (returnType && maybeTypeOfKind(returnType, 1 /* Any */ | 1024 /* Void */)) {
-                return;
-            }
-            // If all we have is a function signature, or an arrow function with an expression body, then there is nothing to check.
-            // also if HasImplicitReturn flag is not set this means that all codepaths in function body end with return or throw
-            if (ts.nodeIsMissing(func.body) || func.body.kind !== 199 /* Block */ || !functionHasImplicitReturn(func)) {
-                return;
-            }
-            var hasExplicitReturn = func.flags & 256 /* HasExplicitReturn */;
-            if (returnType && returnType.flags & 8192 /* Never */) {
-                error(func.type, ts.Diagnostics.A_function_returning_never_cannot_have_a_reachable_end_point);
-            }
-            else if (returnType && !hasExplicitReturn) {
-                // minimal check: function has syntactic return type annotation and no explicit return statements in the body
-                // this function does not conform to the specification.
-                // NOTE: having returnType !== undefined is a precondition for entering this branch so func.type will always be present
-                error(func.type, ts.Diagnostics.A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value);
-            }
-            else if (returnType && strictNullChecks && !isTypeAssignableTo(undefinedType, returnType)) {
-                error(func.type, ts.Diagnostics.Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined);
+        function getIteratedTypeOfIterable(type, errorNode, allowAsyncIterables, allowSyncIterables, checkAssignability) {
+            if (isTypeAny(type)) {
+                return undefined;
             }
-            else if (compilerOptions.noImplicitReturns) {
-                if (!returnType) {
-                    // If return type annotation is omitted check if function has any explicit return statements.
-                    // If it does not have any - its inferred return type is void - don't do any checks.
-                    // Otherwise get inferred return type from function body and report error only if it is not void / anytype
-                    if (!hasExplicitReturn) {
-                        return;
+            return mapType(type, getIteratedType);
+            function getIteratedType(type) {
+                var typeAsIterable = type;
+                if (allowAsyncIterables) {
+                    if (typeAsIterable.iteratedTypeOfAsyncIterable) {
+                        return typeAsIterable.iteratedTypeOfAsyncIterable;
                     }
-                    var inferredReturnType = getReturnTypeOfSignature(getSignatureFromDeclaration(func));
-                    if (isUnwrappedReturnTypeVoidOrAny(func, inferredReturnType)) {
-                        return;
+                    // As an optimization, if the type is an instantiation of the global `AsyncIterable<T>`
+                    // or the global `AsyncIterableIterator<T>` then just grab its type argument.
+                    if (isReferenceToType(type, getGlobalAsyncIterableType(/*reportErrors*/ false)) ||
+                        isReferenceToType(type, getGlobalAsyncIterableIteratorType(/*reportErrors*/ false))) {
+                        return typeAsIterable.iteratedTypeOfAsyncIterable = type.typeArguments[0];
                     }
                 }
-                error(func.type || func, ts.Diagnostics.Not_all_code_paths_return_a_value);
-            }
-        }
-        function checkFunctionExpressionOrObjectLiteralMethod(node, contextualMapper) {
-            ts.Debug.assert(node.kind !== 147 /* MethodDeclaration */ || ts.isObjectLiteralMethod(node));
-            // Grammar checking
-            var hasGrammarError = checkGrammarFunctionLikeDeclaration(node);
-            if (!hasGrammarError && node.kind === 179 /* FunctionExpression */) {
-                checkGrammarForGenerator(node);
-            }
-            // The identityMapper object is used to indicate that function expressions are wildcards
-            if (contextualMapper === identityMapper && isContextSensitive(node)) {
-                checkNodeDeferred(node);
-                return anyFunctionType;
-            }
-            var links = getNodeLinks(node);
-            var type = getTypeOfSymbol(node.symbol);
-            var contextSensitive = isContextSensitive(node);
-            var mightFixTypeParameters = contextSensitive && isInferentialContext(contextualMapper);
-            // Check if function expression is contextually typed and assign parameter types if so.
-            // See the comment in assignTypeToParameterAndFixTypeParameters to understand why we need to
-            // check mightFixTypeParameters.
-            if (mightFixTypeParameters || !(links.flags & 1024 /* ContextChecked */)) {
-                var contextualSignature = getContextualSignature(node);
-                // If a type check is started at a function expression that is an argument of a function call, obtaining the
-                // contextual type may recursively get back to here during overload resolution of the call. If so, we will have
-                // already assigned contextual types.
-                var contextChecked = !!(links.flags & 1024 /* ContextChecked */);
-                if (mightFixTypeParameters || !contextChecked) {
-                    links.flags |= 1024 /* ContextChecked */;
-                    if (contextualSignature) {
-                        var signature = getSignaturesOfType(type, 0 /* Call */)[0];
-                        if (contextSensitive) {
-                            assignContextualParameterTypes(signature, contextualSignature, contextualMapper || identityMapper);
-                        }
-                        if (mightFixTypeParameters || !node.type && !signature.resolvedReturnType) {
-                            var returnType = getReturnTypeFromBody(node, contextualMapper);
-                            if (!signature.resolvedReturnType) {
-                                signature.resolvedReturnType = returnType;
-                            }
-                        }
+                if (allowSyncIterables) {
+                    if (typeAsIterable.iteratedTypeOfIterable) {
+                        return typeAsIterable.iteratedTypeOfIterable;
                     }
-                    if (!contextChecked) {
-                        checkSignatureDeclaration(node);
-                        checkNodeDeferred(node);
+                    // As an optimization, if the type is an instantiation of the global `Iterable<T>` or
+                    // `IterableIterator<T>` then just grab its type argument.
+                    if (isReferenceToType(type, getGlobalIterableType(/*reportErrors*/ false)) ||
+                        isReferenceToType(type, getGlobalIterableIteratorType(/*reportErrors*/ false))) {
+                        return typeAsIterable.iteratedTypeOfIterable = type.typeArguments[0];
                     }
                 }
-            }
-            if (produceDiagnostics && node.kind !== 147 /* MethodDeclaration */ && node.kind !== 146 /* MethodSignature */) {
-                checkCollisionWithCapturedSuperVariable(node, node.name);
-                checkCollisionWithCapturedThisVariable(node, node.name);
-            }
-            return type;
-        }
-        function checkFunctionExpressionOrObjectLiteralMethodDeferred(node) {
-            ts.Debug.assert(node.kind !== 147 /* MethodDeclaration */ || ts.isObjectLiteralMethod(node));
-            var isAsync = ts.isAsyncFunctionLike(node);
-            var returnOrPromisedType = node.type && (isAsync ? checkAsyncFunctionReturnType(node) : getTypeFromTypeNode(node.type));
-            if (!node.asteriskToken) {
-                // return is not necessary in the body of generators
-                checkAllCodePathsInNonVoidFunctionReturnOrThrow(node, returnOrPromisedType);
-            }
-            if (node.body) {
-                if (!node.type) {
-                    // There are some checks that are only performed in getReturnTypeFromBody, that may produce errors
-                    // we need. An example is the noImplicitAny errors resulting from widening the return expression
-                    // of a function. Because checking of function expression bodies is deferred, there was never an
-                    // appropriate time to do this during the main walk of the file (see the comment at the top of
-                    // checkFunctionExpressionBodies). So it must be done now.
-                    getReturnTypeOfSignature(getSignatureFromDeclaration(node));
-                }
-                if (node.body.kind === 199 /* Block */) {
-                    checkSourceElement(node.body);
+                var asyncMethodType = allowAsyncIterables && getTypeOfPropertyOfType(type, ts.getPropertyNameForKnownSymbolName("asyncIterator"));
+                var methodType = asyncMethodType || (allowSyncIterables && getTypeOfPropertyOfType(type, ts.getPropertyNameForKnownSymbolName("iterator")));
+                if (isTypeAny(methodType)) {
+                    return undefined;
                 }
-                else {
-                    // From within an async function you can return either a non-promise value or a promise. Any
-                    // Promise/A+ compatible implementation will always assimilate any foreign promise, so we
-                    // should not be checking assignability of a promise to the return type. Instead, we need to
-                    // check assignability of the awaited type of the expression body against the promised type of
-                    // its return type annotation.
-                    var exprType = checkExpression(node.body);
-                    if (returnOrPromisedType) {
-                        if (isAsync) {
-                            var awaitedType = checkAwaitedType(exprType, node.body, ts.Diagnostics.Expression_body_for_async_arrow_function_does_not_have_a_valid_callable_then_member);
-                            checkTypeAssignableTo(awaitedType, returnOrPromisedType, node.body);
-                        }
-                        else {
-                            checkTypeAssignableTo(exprType, returnOrPromisedType, node.body);
-                        }
+                var signatures = methodType && getSignaturesOfType(methodType, 0 /* Call */);
+                if (!ts.some(signatures)) {
+                    if (errorNode) {
+                        error(errorNode, allowAsyncIterables
+                            ? ts.Diagnostics.Type_must_have_a_Symbol_asyncIterator_method_that_returns_an_async_iterator
+                            : ts.Diagnostics.Type_must_have_a_Symbol_iterator_method_that_returns_an_iterator);
+                        // only report on the first error
+                        errorNode = undefined;
                     }
+                    return undefined;
                 }
-                registerForUnusedIdentifiersCheck(node);
+                var returnType = getUnionType(ts.map(signatures, getReturnTypeOfSignature), /*subtypeReduction*/ true);
+                var iteratedType = getIteratedTypeOfIterator(returnType, errorNode, /*isAsyncIterator*/ !!asyncMethodType);
+                if (checkAssignability && errorNode && iteratedType) {
+                    // If `checkAssignability` was specified, we were called from
+                    // `checkIteratedTypeOrElementType`. As such, we need to validate that
+                    // the type passed in is actually an Iterable.
+                    checkTypeAssignableTo(type, asyncMethodType
+                        ? createAsyncIterableType(iteratedType)
+                        : createIterableType(iteratedType), errorNode);
+                }
+                return asyncMethodType
+                    ? typeAsIterable.iteratedTypeOfAsyncIterable = iteratedType
+                    : typeAsIterable.iteratedTypeOfIterable = iteratedType;
             }
         }
-        function checkArithmeticOperandType(operand, type, diagnostic) {
-            if (!isTypeAnyOrAllConstituentTypesHaveKind(type, 340 /* NumberLike */)) {
-                error(operand, diagnostic);
-                return false;
+        /**
+         * This function has very similar logic as getIteratedTypeOfIterable, except that it operates on
+         * Iterators instead of Iterables. Here is the structure:
+         *
+         *  { // iterator
+         *      next: { // nextMethod
+         *          (): { // nextResult
+         *              value: T // nextValue
+         *          }
+         *      }
+         *  }
+         *
+         * For an async iterator, we expect the following structure:
+         *
+         *  { // iterator
+         *      next: { // nextMethod
+         *          (): PromiseLike<{ // nextResult
+         *              value: T // nextValue
+         *          }>
+         *      }
+         *  }
+         */
+        function getIteratedTypeOfIterator(type, errorNode, isAsyncIterator) {
+            if (isTypeAny(type)) {
+                return undefined;
             }
-            return true;
-        }
-        function isReadonlySymbol(symbol) {
-            // The following symbols are considered read-only:
-            // Properties with a 'readonly' modifier
-            // Variables declared with 'const'
-            // Get accessors without matching set accessors
-            // Enum members
-            // Unions and intersections of the above (unions and intersections eagerly set isReadonly on creation)
-            return symbol.isReadonly ||
-                symbol.flags & 4 /* Property */ && (getDeclarationModifierFlagsFromSymbol(symbol) & 64 /* Readonly */) !== 0 ||
-                symbol.flags & 3 /* Variable */ && (getDeclarationNodeFlagsFromSymbol(symbol) & 2 /* Const */) !== 0 ||
-                symbol.flags & 98304 /* Accessor */ && !(symbol.flags & 65536 /* SetAccessor */) ||
-                (symbol.flags & 8 /* EnumMember */) !== 0;
-        }
-        function isReferenceToReadonlyEntity(expr, symbol) {
-            if (isReadonlySymbol(symbol)) {
-                // Allow assignments to readonly properties within constructors of the same class declaration.
-                if (symbol.flags & 4 /* Property */ &&
-                    (expr.kind === 172 /* PropertyAccessExpression */ || expr.kind === 173 /* ElementAccessExpression */) &&
-                    expr.expression.kind === 97 /* ThisKeyword */) {
-                    // Look for if this is the constructor for the class that `symbol` is a property of.
-                    var func = ts.getContainingFunction(expr);
-                    if (!(func && func.kind === 148 /* Constructor */))
-                        return true;
-                    // If func.parent is a class and symbol is a (readonly) property of that class, or
-                    // if func is a constructor and symbol is a (readonly) parameter property declared in it,
-                    // then symbol is writeable here.
-                    return !(func.parent === symbol.valueDeclaration.parent || func === symbol.valueDeclaration.parent);
-                }
-                return true;
+            var typeAsIterator = type;
+            if (isAsyncIterator ? typeAsIterator.iteratedTypeOfAsyncIterator : typeAsIterator.iteratedTypeOfIterator) {
+                return isAsyncIterator ? typeAsIterator.iteratedTypeOfAsyncIterator : typeAsIterator.iteratedTypeOfIterator;
+            }
+            // As an optimization, if the type is an instantiation of the global `Iterator<T>` (for
+            // a non-async iterator) or the global `AsyncIterator<T>` (for an async-iterator) then
+            // just grab its type argument.
+            var getIteratorType = isAsyncIterator ? getGlobalAsyncIteratorType : getGlobalIteratorType;
+            if (isReferenceToType(type, getIteratorType(/*reportErrors*/ false))) {
+                return isAsyncIterator
+                    ? typeAsIterator.iteratedTypeOfAsyncIterator = type.typeArguments[0]
+                    : typeAsIterator.iteratedTypeOfIterator = type.typeArguments[0];
+            }
+            // Both async and non-async iterators must have a `next` method.
+            var nextMethod = getTypeOfPropertyOfType(type, "next");
+            if (isTypeAny(nextMethod)) {
+                return undefined;
             }
-            return false;
-        }
-        function isReferenceThroughNamespaceImport(expr) {
-            if (expr.kind === 172 /* PropertyAccessExpression */ || expr.kind === 173 /* ElementAccessExpression */) {
-                var node = skipParenthesizedNodes(expr.expression);
-                if (node.kind === 69 /* Identifier */) {
-                    var symbol = getNodeLinks(node).resolvedSymbol;
-                    if (symbol.flags & 8388608 /* Alias */) {
-                        var declaration = getDeclarationOfAliasSymbol(symbol);
-                        return declaration && declaration.kind === 232 /* NamespaceImport */;
-                    }
+            var nextMethodSignatures = nextMethod ? getSignaturesOfType(nextMethod, 0 /* Call */) : emptyArray;
+            if (nextMethodSignatures.length === 0) {
+                if (errorNode) {
+                    error(errorNode, isAsyncIterator
+                        ? ts.Diagnostics.An_async_iterator_must_have_a_next_method
+                        : ts.Diagnostics.An_iterator_must_have_a_next_method);
                 }
+                return undefined;
             }
-            return false;
-        }
-        function checkReferenceExpression(expr, invalidReferenceMessage, constantVariableMessage) {
-            // References are combinations of identifiers, parentheses, and property accesses.
-            var node = skipParenthesizedNodes(expr);
-            if (node.kind !== 69 /* Identifier */ && node.kind !== 172 /* PropertyAccessExpression */ && node.kind !== 173 /* ElementAccessExpression */) {
-                error(expr, invalidReferenceMessage);
-                return false;
+            var nextResult = getUnionType(ts.map(nextMethodSignatures, getReturnTypeOfSignature), /*subtypeReduction*/ true);
+            if (isTypeAny(nextResult)) {
+                return undefined;
             }
-            // Because we get the symbol from the resolvedSymbol property, it might be of kind
-            // SymbolFlags.ExportValue. In this case it is necessary to get the actual export
-            // symbol, which will have the correct flags set on it.
-            var links = getNodeLinks(node);
-            var symbol = getExportSymbolOfValueSymbolIfExported(links.resolvedSymbol);
-            if (symbol) {
-                if (symbol !== unknownSymbol && symbol !== argumentsSymbol) {
-                    // Only variables (and not functions, classes, namespaces, enum objects, or enum members)
-                    // are considered references when referenced using a simple identifier.
-                    if (node.kind === 69 /* Identifier */ && !(symbol.flags & 3 /* Variable */)) {
-                        error(expr, invalidReferenceMessage);
-                        return false;
-                    }
-                    if (isReferenceToReadonlyEntity(node, symbol) || isReferenceThroughNamespaceImport(node)) {
-                        error(expr, constantVariableMessage);
-                        return false;
-                    }
+            // For an async iterator, we must get the awaited type of the return type.
+            if (isAsyncIterator) {
+                nextResult = getAwaitedTypeOfPromise(nextResult, errorNode, ts.Diagnostics.The_type_returned_by_the_next_method_of_an_async_iterator_must_be_a_promise_for_a_type_with_a_value_property);
+                if (isTypeAny(nextResult)) {
+                    return undefined;
                 }
             }
-            else if (node.kind === 173 /* ElementAccessExpression */) {
-                if (links.resolvedIndexInfo && links.resolvedIndexInfo.isReadonly) {
-                    error(expr, constantVariableMessage);
-                    return false;
+            var nextValue = nextResult && getTypeOfPropertyOfType(nextResult, "value");
+            if (!nextValue) {
+                if (errorNode) {
+                    error(errorNode, isAsyncIterator
+                        ? ts.Diagnostics.The_type_returned_by_the_next_method_of_an_async_iterator_must_be_a_promise_for_a_type_with_a_value_property
+                        : ts.Diagnostics.The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property);
                 }
+                return undefined;
             }
-            return true;
+            return isAsyncIterator
+                ? typeAsIterator.iteratedTypeOfAsyncIterator = nextValue
+                : typeAsIterator.iteratedTypeOfIterator = nextValue;
         }
-        function checkDeleteExpression(node) {
-            checkExpression(node.expression);
-            return booleanType;
+        /**
+         * A generator may have a return type of `Iterator<T>`, `Iterable<T>`, or
+         * `IterableIterator<T>`. An async generator may have a return type of `AsyncIterator<T>`,
+         * `AsyncIterable<T>`, or `AsyncIterableIterator<T>`. This function can be used to extract
+         * the iterated type from this return type for contextual typing and verifying signatures.
+         */
+        function getIteratedTypeOfGenerator(returnType, isAsyncGenerator) {
+            if (isTypeAny(returnType)) {
+                return undefined;
+            }
+            return getIteratedTypeOfIterable(returnType, /*errorNode*/ undefined, /*allowAsyncIterables*/ isAsyncGenerator, /*allowSyncIterables*/ !isAsyncGenerator, /*checkAssignability*/ false)
+                || getIteratedTypeOfIterator(returnType, /*errorNode*/ undefined, isAsyncGenerator);
         }
-        function checkTypeOfExpression(node) {
-            checkExpression(node.expression);
-            return stringType;
+        function checkBreakOrContinueStatement(node) {
+            // Grammar checking
+            checkGrammarStatementInAmbientContext(node) || checkGrammarBreakOrContinueStatement(node);
+            // TODO: Check that target label is valid
         }
-        function checkVoidExpression(node) {
-            checkExpression(node.expression);
-            return undefinedWideningType;
+        function isGetAccessorWithAnnotatedSetAccessor(node) {
+            return node.kind === 153 /* GetAccessor */
+                && ts.getEffectiveSetAccessorTypeAnnotationNode(ts.getDeclarationOfKind(node.symbol, 154 /* SetAccessor */)) !== undefined;
         }
-        function checkAwaitExpression(node) {
+        function isUnwrappedReturnTypeVoidOrAny(func, returnType) {
+            var unwrappedReturnType = (ts.getFunctionFlags(func) & 3 /* AsyncGenerator */) === 2 /* Async */
+                ? getPromisedTypeOfPromise(returnType) // Async function
+                : returnType; // AsyncGenerator function, Generator function, or normal function
+            return unwrappedReturnType && maybeTypeOfKind(unwrappedReturnType, 1024 /* Void */ | 1 /* Any */);
+        }
+        function checkReturnStatement(node) {
             // Grammar checking
-            if (produceDiagnostics) {
-                if (!(node.flags & 262144 /* AwaitContext */)) {
-                    grammarErrorOnFirstToken(node, ts.Diagnostics.await_expression_is_only_allowed_within_an_async_function);
-                }
-                if (isInParameterInitializerBeforeContainingFunction(node)) {
-                    error(node, ts.Diagnostics.await_expressions_cannot_be_used_in_a_parameter_initializer);
+            if (!checkGrammarStatementInAmbientContext(node)) {
+                var functionBlock = ts.getContainingFunction(node);
+                if (!functionBlock) {
+                    grammarErrorOnFirstToken(node, ts.Diagnostics.A_return_statement_can_only_be_used_within_a_function_body);
                 }
             }
-            var operandType = checkExpression(node.expression);
-            return checkAwaitedType(operandType, node);
-        }
-        function checkPrefixUnaryExpression(node) {
-            var operandType = checkExpression(node.operand);
-            if (operandType === silentNeverType) {
-                return silentNeverType;
-            }
-            if (node.operator === 36 /* MinusToken */ && node.operand.kind === 8 /* NumericLiteral */) {
-                return getFreshTypeOfLiteralType(getLiteralTypeForText(64 /* NumberLiteral */, "" + -node.operand.text));
-            }
-            switch (node.operator) {
-                case 35 /* PlusToken */:
-                case 36 /* MinusToken */:
-                case 50 /* TildeToken */:
-                    if (maybeTypeOfKind(operandType, 512 /* ESSymbol */)) {
-                        error(node.operand, ts.Diagnostics.The_0_operator_cannot_be_applied_to_type_symbol, ts.tokenToString(node.operator));
+            var func = ts.getContainingFunction(node);
+            if (func) {
+                var signature = getSignatureFromDeclaration(func);
+                var returnType = getReturnTypeOfSignature(signature);
+                if (strictNullChecks || node.expression || returnType.flags & 8192 /* Never */) {
+                    var exprType = node.expression ? checkExpressionCached(node.expression) : undefinedType;
+                    var functionFlags = ts.getFunctionFlags(func);
+                    if (functionFlags & 1 /* Generator */) {
+                        // A generator does not need its return expressions checked against its return type.
+                        // Instead, the yield expressions are checked against the element type.
+                        // TODO: Check return expressions of generators when return type tracking is added
+                        // for generators.
+                        return;
                     }
-                    return numberType;
-                case 49 /* ExclamationToken */:
-                    var facts = getTypeFacts(operandType) & (1048576 /* Truthy */ | 2097152 /* Falsy */);
-                    return facts === 1048576 /* Truthy */ ? falseType :
-                        facts === 2097152 /* Falsy */ ? trueType :
-                            booleanType;
-                case 41 /* PlusPlusToken */:
-                case 42 /* MinusMinusToken */:
-                    var ok = checkArithmeticOperandType(node.operand, getNonNullableType(operandType), ts.Diagnostics.An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type);
-                    if (ok) {
-                        // run check only if former checks succeeded to avoid reporting cascading errors
-                        checkReferenceExpression(node.operand, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property);
+                    if (func.kind === 154 /* SetAccessor */) {
+                        if (node.expression) {
+                            error(node, ts.Diagnostics.Setters_cannot_return_a_value);
+                        }
                     }
-                    return numberType;
-            }
-            return unknownType;
-        }
-        function checkPostfixUnaryExpression(node) {
-            var operandType = checkExpression(node.operand);
-            if (operandType === silentNeverType) {
-                return silentNeverType;
-            }
-            var ok = checkArithmeticOperandType(node.operand, getNonNullableType(operandType), ts.Diagnostics.An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type);
-            if (ok) {
-                // run check only if former checks succeeded to avoid reporting cascading errors
-                checkReferenceExpression(node.operand, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property);
-            }
-            return numberType;
-        }
-        // Return true if type might be of the given kind. A union or intersection type might be of a given
-        // kind if at least one constituent type is of the given kind.
-        function maybeTypeOfKind(type, kind) {
-            if (type.flags & kind) {
-                return true;
-            }
-            if (type.flags & 1572864 /* UnionOrIntersection */) {
-                var types = type.types;
-                for (var _i = 0, types_14 = types; _i < types_14.length; _i++) {
-                    var t = types_14[_i];
-                    if (maybeTypeOfKind(t, kind)) {
-                        return true;
+                    else if (func.kind === 152 /* Constructor */) {
+                        if (node.expression && !checkTypeAssignableTo(exprType, returnType, node)) {
+                            error(node, ts.Diagnostics.Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class);
+                        }
                     }
-                }
-            }
-            return false;
-        }
-        // Return true if type is of the given kind. A union type is of a given kind if all constituent types
-        // are of the given kind. An intersection type is of a given kind if at least one constituent type is
-        // of the given kind.
-        function isTypeOfKind(type, kind) {
-            if (type.flags & kind) {
-                return true;
-            }
-            if (type.flags & 524288 /* Union */) {
-                var types = type.types;
-                for (var _i = 0, types_15 = types; _i < types_15.length; _i++) {
-                    var t = types_15[_i];
-                    if (!isTypeOfKind(t, kind)) {
-                        return false;
+                    else if (ts.getEffectiveReturnTypeNode(func) || isGetAccessorWithAnnotatedSetAccessor(func)) {
+                        if (functionFlags & 2 /* Async */) {
+                            var promisedType = getPromisedTypeOfPromise(returnType);
+                            var awaitedType = checkAwaitedType(exprType, node, ts.Diagnostics.The_return_type_of_an_async_function_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member);
+                            if (promisedType) {
+                                // If the function has a return type, but promisedType is
+                                // undefined, an error will be reported in checkAsyncFunctionReturnType
+                                // so we don't need to report one here.
+                                checkTypeAssignableTo(awaitedType, promisedType, node);
+                            }
+                        }
+                        else {
+                            checkTypeAssignableTo(exprType, returnType, node);
+                        }
                     }
                 }
-                return true;
-            }
-            if (type.flags & 1048576 /* Intersection */) {
-                var types = type.types;
-                for (var _a = 0, types_16 = types; _a < types_16.length; _a++) {
-                    var t = types_16[_a];
-                    if (isTypeOfKind(t, kind)) {
-                        return true;
-                    }
+                else if (func.kind !== 152 /* Constructor */ && compilerOptions.noImplicitReturns && !isUnwrappedReturnTypeVoidOrAny(func, returnType)) {
+                    // The function has a return type, but the return statement doesn't have an expression.
+                    error(node, ts.Diagnostics.Not_all_code_paths_return_a_value);
                 }
             }
-            return false;
-        }
-        function isConstEnumObjectType(type) {
-            return type.flags & (2588672 /* ObjectType */ | 2097152 /* Anonymous */) && type.symbol && isConstEnumSymbol(type.symbol);
-        }
-        function isConstEnumSymbol(symbol) {
-            return (symbol.flags & 128 /* ConstEnum */) !== 0;
-        }
-        function checkInstanceOfExpression(left, right, leftType, rightType) {
-            if (leftType === silentNeverType || rightType === silentNeverType) {
-                return silentNeverType;
-            }
-            // TypeScript 1.0 spec (April 2014): 4.15.4
-            // The instanceof operator requires the left operand to be of type Any, an object type, or a type parameter type,
-            // and the right operand to be of type Any or a subtype of the 'Function' interface type.
-            // The result is always of the Boolean primitive type.
-            // NOTE: do not raise error if leftType is unknown as related error was already reported
-            if (isTypeOfKind(leftType, 8190 /* Primitive */)) {
-                error(left, ts.Diagnostics.The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_parameter);
-            }
-            // NOTE: do not raise error if right is unknown as related error was already reported
-            if (!(isTypeAny(rightType) || isTypeSubtypeOf(rightType, globalFunctionType))) {
-                error(right, ts.Diagnostics.The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_Function_interface_type);
-            }
-            return booleanType;
         }
-        function checkInExpression(left, right, leftType, rightType) {
-            if (leftType === silentNeverType || rightType === silentNeverType) {
-                return silentNeverType;
-            }
-            // TypeScript 1.0 spec (April 2014): 4.15.5
-            // The in operator requires the left operand to be of type Any, the String primitive type, or the Number primitive type,
-            // and the right operand to be of type Any, an object type, or a type parameter type.
-            // The result is always of the Boolean primitive type.
-            if (!isTypeAnyOrAllConstituentTypesHaveKind(leftType, 34 /* StringLike */ | 340 /* NumberLike */ | 512 /* ESSymbol */)) {
-                error(left, ts.Diagnostics.The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol);
-            }
-            if (!isTypeAnyOrAllConstituentTypesHaveKind(rightType, 2588672 /* ObjectType */ | 16384 /* TypeParameter */)) {
-                error(right, ts.Diagnostics.The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter);
+        function checkWithStatement(node) {
+            // Grammar checking for withStatement
+            if (!checkGrammarStatementInAmbientContext(node)) {
+                if (node.flags & 16384 /* AwaitContext */) {
+                    grammarErrorOnFirstToken(node, ts.Diagnostics.with_statements_are_not_allowed_in_an_async_function_block);
+                }
             }
-            return booleanType;
-        }
-        function checkObjectLiteralAssignment(node, sourceType, contextualMapper) {
-            var properties = node.properties;
-            for (var _i = 0, properties_4 = properties; _i < properties_4.length; _i++) {
-                var p = properties_4[_i];
-                checkObjectLiteralDestructuringPropertyAssignment(sourceType, p, contextualMapper);
+            checkExpression(node.expression);
+            var sourceFile = ts.getSourceFileOfNode(node);
+            if (!hasParseDiagnostics(sourceFile)) {
+                var start = ts.getSpanOfTokenAtPosition(sourceFile, node.pos).start;
+                var end = node.statement.pos;
+                grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.The_with_statement_is_not_supported_All_symbols_in_a_with_block_will_have_type_any);
             }
-            return sourceType;
         }
-        function checkObjectLiteralDestructuringPropertyAssignment(objectLiteralType, property, contextualMapper) {
-            if (property.kind === 253 /* PropertyAssignment */ || property.kind === 254 /* ShorthandPropertyAssignment */) {
-                var name_17 = property.name;
-                if (name_17.kind === 140 /* ComputedPropertyName */) {
-                    checkComputedPropertyName(name_17);
-                }
-                if (isComputedNonLiteralName(name_17)) {
-                    return undefined;
-                }
-                var text = getTextOfPropertyName(name_17);
-                var type = isTypeAny(objectLiteralType)
-                    ? objectLiteralType
-                    : getTypeOfPropertyOfType(objectLiteralType, text) ||
-                        isNumericLiteralName(text) && getIndexTypeOfType(objectLiteralType, 1 /* Number */) ||
-                        getIndexTypeOfType(objectLiteralType, 0 /* String */);
-                if (type) {
-                    if (property.kind === 254 /* ShorthandPropertyAssignment */) {
-                        return checkDestructuringAssignment(property, type);
+        function checkSwitchStatement(node) {
+            // Grammar checking
+            checkGrammarStatementInAmbientContext(node);
+            var firstDefaultClause;
+            var hasDuplicateDefaultClause = false;
+            var expressionType = checkExpression(node.expression);
+            var expressionIsLiteral = isLiteralType(expressionType);
+            ts.forEach(node.caseBlock.clauses, function (clause) {
+                // Grammar check for duplicate default clauses, skip if we already report duplicate default clause
+                if (clause.kind === 258 /* DefaultClause */ && !hasDuplicateDefaultClause) {
+                    if (firstDefaultClause === undefined) {
+                        firstDefaultClause = clause;
                     }
                     else {
-                        // non-shorthand property assignments should always have initializers
-                        return checkDestructuringAssignment(property.initializer, type);
+                        var sourceFile = ts.getSourceFileOfNode(node);
+                        var start = ts.skipTrivia(sourceFile.text, clause.pos);
+                        var end = clause.statements.length > 0 ? clause.statements[0].pos : clause.end;
+                        grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.A_default_clause_cannot_appear_more_than_once_in_a_switch_statement);
+                        hasDuplicateDefaultClause = true;
                     }
                 }
-                else {
-                    error(name_17, ts.Diagnostics.Type_0_has_no_property_1_and_no_string_index_signature, typeToString(objectLiteralType), ts.declarationNameToString(name_17));
+                if (produceDiagnostics && clause.kind === 257 /* CaseClause */) {
+                    var caseClause = clause;
+                    // TypeScript 1.0 spec (April 2014): 5.9
+                    // In a 'switch' statement, each 'case' expression must be of a type that is comparable
+                    // to or from the type of the 'switch' expression.
+                    var caseType = checkExpression(caseClause.expression);
+                    var caseIsLiteral = isLiteralType(caseType);
+                    var comparedExpressionType = expressionType;
+                    if (!caseIsLiteral || !expressionIsLiteral) {
+                        caseType = caseIsLiteral ? getBaseTypeOfLiteralType(caseType) : caseType;
+                        comparedExpressionType = getBaseTypeOfLiteralType(expressionType);
+                    }
+                    if (!isTypeEqualityComparableTo(comparedExpressionType, caseType)) {
+                        // expressionType is not comparable to caseType, try the reversed check and report errors if it fails
+                        checkTypeComparableTo(caseType, comparedExpressionType, caseClause.expression, /*headMessage*/ undefined);
+                    }
                 }
+                ts.forEach(clause.statements, checkSourceElement);
+            });
+            if (node.caseBlock.locals) {
+                registerForUnusedIdentifiersCheck(node.caseBlock);
             }
-            else {
-                error(property, ts.Diagnostics.Property_assignment_expected);
+        }
+        function checkLabeledStatement(node) {
+            // Grammar checking
+            if (!checkGrammarStatementInAmbientContext(node)) {
+                ts.findAncestor(node.parent, function (current) {
+                    if (ts.isFunctionLike(current)) {
+                        return "quit";
+                    }
+                    if (current.kind === 222 /* LabeledStatement */ && current.label.text === node.label.text) {
+                        var sourceFile = ts.getSourceFileOfNode(node);
+                        grammarErrorOnNode(node.label, ts.Diagnostics.Duplicate_label_0, ts.getTextOfNodeFromSourceText(sourceFile.text, node.label));
+                        return true;
+                    }
+                });
             }
+            // ensure that label is unique
+            checkSourceElement(node.statement);
         }
-        function checkArrayLiteralAssignment(node, sourceType, contextualMapper) {
-            // This elementType will be used if the specific property corresponding to this index is not
-            // present (aka the tuple element property). This call also checks that the parentType is in
-            // fact an iterable or array (depending on target language).
-            var elementType = checkIteratedTypeOrElementType(sourceType, node, /*allowStringInput*/ false) || unknownType;
-            var elements = node.elements;
-            for (var i = 0; i < elements.length; i++) {
-                checkArrayLiteralDestructuringElementAssignment(node, sourceType, i, elementType, contextualMapper);
+        function checkThrowStatement(node) {
+            // Grammar checking
+            if (!checkGrammarStatementInAmbientContext(node)) {
+                if (node.expression === undefined) {
+                    grammarErrorAfterFirstToken(node, ts.Diagnostics.Line_break_not_permitted_here);
+                }
+            }
+            if (node.expression) {
+                checkExpression(node.expression);
             }
-            return sourceType;
         }
-        function checkArrayLiteralDestructuringElementAssignment(node, sourceType, elementIndex, elementType, contextualMapper) {
-            var elements = node.elements;
-            var element = elements[elementIndex];
-            if (element.kind !== 193 /* OmittedExpression */) {
-                if (element.kind !== 191 /* SpreadElementExpression */) {
-                    var propName = "" + elementIndex;
-                    var type = isTypeAny(sourceType)
-                        ? sourceType
-                        : isTupleLikeType(sourceType)
-                            ? getTypeOfPropertyOfType(sourceType, propName)
-                            : elementType;
-                    if (type) {
-                        return checkDestructuringAssignment(element, type, contextualMapper);
-                    }
-                    else {
-                        // We still need to check element expression here because we may need to set appropriate flag on the expression
-                        // such as NodeCheckFlags.LexicalThis on "this"expression.
-                        checkExpression(element);
-                        if (isTupleType(sourceType)) {
-                            error(element, ts.Diagnostics.Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2, typeToString(sourceType), getTypeReferenceArity(sourceType), elements.length);
-                        }
-                        else {
-                            error(element, ts.Diagnostics.Type_0_has_no_property_1, typeToString(sourceType), propName);
-                        }
+        function checkTryStatement(node) {
+            // Grammar checking
+            checkGrammarStatementInAmbientContext(node);
+            checkBlock(node.tryBlock);
+            var catchClause = node.catchClause;
+            if (catchClause) {
+                // Grammar checking
+                if (catchClause.variableDeclaration) {
+                    if (catchClause.variableDeclaration.type) {
+                        grammarErrorOnFirstToken(catchClause.variableDeclaration.type, ts.Diagnostics.Catch_clause_variable_cannot_have_a_type_annotation);
                     }
-                }
-                else {
-                    if (elementIndex < elements.length - 1) {
-                        error(element, ts.Diagnostics.A_rest_element_must_be_last_in_an_array_destructuring_pattern);
+                    else if (catchClause.variableDeclaration.initializer) {
+                        grammarErrorOnFirstToken(catchClause.variableDeclaration.initializer, ts.Diagnostics.Catch_clause_variable_cannot_have_an_initializer);
                     }
                     else {
-                        var restExpression = element.expression;
-                        if (restExpression.kind === 187 /* BinaryExpression */ && restExpression.operatorToken.kind === 56 /* EqualsToken */) {
-                            error(restExpression.operatorToken, ts.Diagnostics.A_rest_element_cannot_have_an_initializer);
-                        }
-                        else {
-                            return checkDestructuringAssignment(restExpression, createArrayType(elementType), contextualMapper);
+                        var blockLocals_1 = catchClause.block.locals;
+                        if (blockLocals_1) {
+                            ts.forEachKey(catchClause.locals, function (caughtName) {
+                                var blockLocal = blockLocals_1.get(caughtName);
+                                if (blockLocal && (blockLocal.flags & 2 /* BlockScopedVariable */) !== 0) {
+                                    grammarErrorOnNode(blockLocal.valueDeclaration, ts.Diagnostics.Cannot_redeclare_identifier_0_in_catch_clause, caughtName);
+                                }
+                            });
                         }
                     }
                 }
+                checkBlock(catchClause.block);
+            }
+            if (node.finallyBlock) {
+                checkBlock(node.finallyBlock);
             }
-            return undefined;
         }
-        function checkDestructuringAssignment(exprOrAssignment, sourceType, contextualMapper) {
-            var target;
-            if (exprOrAssignment.kind === 254 /* ShorthandPropertyAssignment */) {
-                var prop = exprOrAssignment;
-                if (prop.objectAssignmentInitializer) {
-                    // In strict null checking mode, if a default value of a non-undefined type is specified, remove
-                    // undefined from the final type.
-                    if (strictNullChecks &&
-                        !(getFalsyFlags(checkExpression(prop.objectAssignmentInitializer)) & 2048 /* Undefined */)) {
-                        sourceType = getTypeWithFacts(sourceType, 131072 /* NEUndefined */);
+        function checkIndexConstraints(type) {
+            var declaredNumberIndexer = getIndexDeclarationOfSymbol(type.symbol, 1 /* Number */);
+            var declaredStringIndexer = getIndexDeclarationOfSymbol(type.symbol, 0 /* String */);
+            var stringIndexType = getIndexTypeOfType(type, 0 /* String */);
+            var numberIndexType = getIndexTypeOfType(type, 1 /* Number */);
+            if (stringIndexType || numberIndexType) {
+                ts.forEach(getPropertiesOfObjectType(type), function (prop) {
+                    var propType = getTypeOfSymbol(prop);
+                    checkIndexConstraintForProperty(prop, propType, type, declaredStringIndexer, stringIndexType, 0 /* String */);
+                    checkIndexConstraintForProperty(prop, propType, type, declaredNumberIndexer, numberIndexType, 1 /* Number */);
+                });
+                if (getObjectFlags(type) & 1 /* Class */ && ts.isClassLike(type.symbol.valueDeclaration)) {
+                    var classDeclaration = type.symbol.valueDeclaration;
+                    for (var _i = 0, _a = classDeclaration.members; _i < _a.length; _i++) {
+                        var member = _a[_i];
+                        // Only process instance properties with computed names here.
+                        // Static properties cannot be in conflict with indexers,
+                        // and properties with literal names were already checked.
+                        if (!(ts.getModifierFlags(member) & 32 /* Static */) && ts.hasDynamicName(member)) {
+                            var propType = getTypeOfSymbol(member.symbol);
+                            checkIndexConstraintForProperty(member.symbol, propType, type, declaredStringIndexer, stringIndexType, 0 /* String */);
+                            checkIndexConstraintForProperty(member.symbol, propType, type, declaredNumberIndexer, numberIndexType, 1 /* Number */);
+                        }
                     }
-                    checkBinaryLikeExpression(prop.name, prop.equalsToken, prop.objectAssignmentInitializer, contextualMapper);
                 }
-                target = exprOrAssignment.name;
             }
-            else {
-                target = exprOrAssignment;
-            }
-            if (target.kind === 187 /* BinaryExpression */ && target.operatorToken.kind === 56 /* EqualsToken */) {
-                checkBinaryExpression(target, contextualMapper);
-                target = target.left;
+            var errorNode;
+            if (stringIndexType && numberIndexType) {
+                errorNode = declaredNumberIndexer || declaredStringIndexer;
+                // condition 'errorNode === undefined' may appear if types does not declare nor string neither number indexer
+                if (!errorNode && (getObjectFlags(type) & 2 /* Interface */)) {
+                    var someBaseTypeHasBothIndexers = ts.forEach(getBaseTypes(type), function (base) { return getIndexTypeOfType(base, 0 /* String */) && getIndexTypeOfType(base, 1 /* Number */); });
+                    errorNode = someBaseTypeHasBothIndexers ? undefined : type.symbol.declarations[0];
+                }
             }
-            if (target.kind === 171 /* ObjectLiteralExpression */) {
-                return checkObjectLiteralAssignment(target, sourceType, contextualMapper);
+            if (errorNode && !isTypeAssignableTo(numberIndexType, stringIndexType)) {
+                error(errorNode, ts.Diagnostics.Numeric_index_type_0_is_not_assignable_to_string_index_type_1, typeToString(numberIndexType), typeToString(stringIndexType));
             }
-            if (target.kind === 170 /* ArrayLiteralExpression */) {
-                return checkArrayLiteralAssignment(target, sourceType, contextualMapper);
+            function checkIndexConstraintForProperty(prop, propertyType, containingType, indexDeclaration, indexType, indexKind) {
+                if (!indexType) {
+                    return;
+                }
+                var propDeclaration = prop.valueDeclaration;
+                // index is numeric and property name is not valid numeric literal
+                if (indexKind === 1 /* Number */ && !(propDeclaration ? isNumericName(ts.getNameOfDeclaration(propDeclaration)) : isNumericLiteralName(prop.name))) {
+                    return;
+                }
+                // perform property check if property or indexer is declared in 'type'
+                // this allows us to rule out cases when both property and indexer are inherited from the base class
+                var errorNode;
+                if (propDeclaration &&
+                    (propDeclaration.kind === 194 /* BinaryExpression */ ||
+                        ts.getNameOfDeclaration(propDeclaration).kind === 144 /* ComputedPropertyName */ ||
+                        prop.parent === containingType.symbol)) {
+                    errorNode = propDeclaration;
+                }
+                else if (indexDeclaration) {
+                    errorNode = indexDeclaration;
+                }
+                else if (getObjectFlags(containingType) & 2 /* Interface */) {
+                    // for interfaces property and indexer might be inherited from different bases
+                    // check if any base class already has both property and indexer.
+                    // check should be performed only if 'type' is the first type that brings property\indexer together
+                    var someBaseClassHasBothPropertyAndIndexer = ts.forEach(getBaseTypes(containingType), function (base) { return getPropertyOfObjectType(base, prop.name) && getIndexTypeOfType(base, indexKind); });
+                    errorNode = someBaseClassHasBothPropertyAndIndexer ? undefined : containingType.symbol.declarations[0];
+                }
+                if (errorNode && !isTypeAssignableTo(propertyType, indexType)) {
+                    var errorMessage = indexKind === 0 /* String */
+                        ? ts.Diagnostics.Property_0_of_type_1_is_not_assignable_to_string_index_type_2
+                        : ts.Diagnostics.Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2;
+                    error(errorNode, errorMessage, symbolToString(prop), typeToString(propertyType), typeToString(indexType));
+                }
             }
-            return checkReferenceAssignment(target, sourceType, contextualMapper);
         }
-        function checkReferenceAssignment(target, sourceType, contextualMapper) {
-            var targetType = checkExpression(target, contextualMapper);
-            if (checkReferenceExpression(target, ts.Diagnostics.Invalid_left_hand_side_of_assignment_expression, ts.Diagnostics.Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property)) {
-                checkTypeAssignableTo(sourceType, targetType, target, /*headMessage*/ undefined);
+        function checkTypeNameIsReserved(name, message) {
+            // TS 1.0 spec (April 2014): 3.6.1
+            // The predefined type keywords are reserved and cannot be used as names of user defined types.
+            switch (name.text) {
+                case "any":
+                case "number":
+                case "boolean":
+                case "string":
+                case "symbol":
+                case "void":
+                case "object":
+                    error(name, message, name.text);
             }
-            return sourceType;
         }
         /**
-         * This is a *shallow* check: An expression is side-effect-free if the
-         * evaluation of the expression *itself* cannot produce side effects.
-         * For example, x++ / 3 is side-effect free because the / operator
-         * does not have side effects.
-         * The intent is to "smell test" an expression for correctness in positions where
-         * its value is discarded (e.g. the left side of the comma operator).
+         * Check each type parameter and check that type parameters have no duplicate type parameter declarations
          */
-        function isSideEffectFree(node) {
-            node = ts.skipParentheses(node);
-            switch (node.kind) {
-                case 69 /* Identifier */:
-                case 9 /* StringLiteral */:
-                case 10 /* RegularExpressionLiteral */:
-                case 176 /* TaggedTemplateExpression */:
-                case 189 /* TemplateExpression */:
-                case 11 /* NoSubstitutionTemplateLiteral */:
-                case 8 /* NumericLiteral */:
-                case 99 /* TrueKeyword */:
-                case 84 /* FalseKeyword */:
-                case 93 /* NullKeyword */:
-                case 135 /* UndefinedKeyword */:
-                case 179 /* FunctionExpression */:
-                case 192 /* ClassExpression */:
-                case 180 /* ArrowFunction */:
-                case 170 /* ArrayLiteralExpression */:
-                case 171 /* ObjectLiteralExpression */:
-                case 182 /* TypeOfExpression */:
-                case 196 /* NonNullExpression */:
-                case 242 /* JsxSelfClosingElement */:
-                case 241 /* JsxElement */:
-                    return true;
-                case 188 /* ConditionalExpression */:
-                    return isSideEffectFree(node.whenTrue) &&
-                        isSideEffectFree(node.whenFalse);
-                case 187 /* BinaryExpression */:
-                    if (ts.isAssignmentOperator(node.operatorToken.kind)) {
-                        return false;
+        function checkTypeParameters(typeParameterDeclarations) {
+            if (typeParameterDeclarations) {
+                var seenDefault = false;
+                for (var i = 0; i < typeParameterDeclarations.length; i++) {
+                    var node = typeParameterDeclarations[i];
+                    checkTypeParameter(node);
+                    if (produceDiagnostics) {
+                        if (node.default) {
+                            seenDefault = true;
+                        }
+                        else if (seenDefault) {
+                            error(node, ts.Diagnostics.Required_type_parameters_may_not_follow_optional_type_parameters);
+                        }
+                        for (var j = 0; j < i; j++) {
+                            if (typeParameterDeclarations[j].symbol === node.symbol) {
+                                error(node.name, ts.Diagnostics.Duplicate_identifier_0, ts.declarationNameToString(node.name));
+                            }
+                        }
                     }
-                    return isSideEffectFree(node.left) &&
-                        isSideEffectFree(node.right);
-                case 185 /* PrefixUnaryExpression */:
-                case 186 /* PostfixUnaryExpression */:
-                    // Unary operators ~, !, +, and - have no side effects.
-                    // The rest do.
-                    switch (node.operator) {
-                        case 49 /* ExclamationToken */:
-                        case 35 /* PlusToken */:
-                        case 36 /* MinusToken */:
-                        case 50 /* TildeToken */:
-                            return true;
+                }
+            }
+        }
+        /** Check that type parameter lists are identical across multiple declarations */
+        function checkTypeParameterListsIdentical(symbol) {
+            if (symbol.declarations.length === 1) {
+                return;
+            }
+            var links = getSymbolLinks(symbol);
+            if (!links.typeParametersChecked) {
+                links.typeParametersChecked = true;
+                var declarations = getClassOrInterfaceDeclarationsOfSymbol(symbol);
+                if (declarations.length <= 1) {
+                    return;
+                }
+                var type = getDeclaredTypeOfSymbol(symbol);
+                if (!areTypeParametersIdentical(declarations, type.localTypeParameters)) {
+                    // Report an error on every conflicting declaration.
+                    var name_30 = symbolToString(symbol);
+                    for (var _i = 0, declarations_6 = declarations; _i < declarations_6.length; _i++) {
+                        var declaration = declarations_6[_i];
+                        error(declaration.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_type_parameters, name_30);
                     }
+                }
+            }
+        }
+        function areTypeParametersIdentical(declarations, typeParameters) {
+            var maxTypeArgumentCount = ts.length(typeParameters);
+            var minTypeArgumentCount = getMinTypeArgumentCount(typeParameters);
+            for (var _i = 0, declarations_7 = declarations; _i < declarations_7.length; _i++) {
+                var declaration = declarations_7[_i];
+                // If this declaration has too few or too many type parameters, we report an error
+                var numTypeParameters = ts.length(declaration.typeParameters);
+                if (numTypeParameters < minTypeArgumentCount || numTypeParameters > maxTypeArgumentCount) {
                     return false;
-                // Some forms listed here for clarity
-                case 183 /* VoidExpression */: // Explicit opt-out
-                case 177 /* TypeAssertionExpression */: // Not SEF, but can produce useful type warnings
-                case 195 /* AsExpression */: // Not SEF, but can produce useful type warnings
-                default:
-                    return false;
+                }
+                for (var i = 0; i < numTypeParameters; i++) {
+                    var source = declaration.typeParameters[i];
+                    var target = typeParameters[i];
+                    // If the type parameter node does not have the same as the resolved type
+                    // parameter at this position, we report an error.
+                    if (source.name.text !== target.symbol.name) {
+                        return false;
+                    }
+                    // If the type parameter node does not have an identical constraint as the resolved
+                    // type parameter at this position, we report an error.
+                    var sourceConstraint = source.constraint && getTypeFromTypeNode(source.constraint);
+                    var targetConstraint = getConstraintFromTypeParameter(target);
+                    if ((sourceConstraint || targetConstraint) &&
+                        (!sourceConstraint || !targetConstraint || !isTypeIdenticalTo(sourceConstraint, targetConstraint))) {
+                        return false;
+                    }
+                    // If the type parameter node has a default and it is not identical to the default
+                    // for the type parameter at this position, we report an error.
+                    var sourceDefault = source.default && getTypeFromTypeNode(source.default);
+                    var targetDefault = getDefaultFromTypeParameter(target);
+                    if (sourceDefault && targetDefault && !isTypeIdenticalTo(sourceDefault, targetDefault)) {
+                        return false;
+                    }
+                }
             }
+            return true;
         }
-        function isTypeEqualityComparableTo(source, target) {
-            return (target.flags & 6144 /* Nullable */) !== 0 || isTypeComparableTo(source, target);
+        function checkClassExpression(node) {
+            checkClassLikeDeclaration(node);
+            checkNodeDeferred(node);
+            return getTypeOfSymbol(getSymbolOfNode(node));
         }
-        function getBestChoiceType(type1, type2) {
-            var firstAssignableToSecond = isTypeAssignableTo(type1, type2);
-            var secondAssignableToFirst = isTypeAssignableTo(type2, type1);
-            return secondAssignableToFirst && !firstAssignableToSecond ? type1 :
-                firstAssignableToSecond && !secondAssignableToFirst ? type2 :
-                    getUnionType([type1, type2], /*subtypeReduction*/ true);
+        function checkClassExpressionDeferred(node) {
+            ts.forEach(node.members, checkSourceElement);
+            registerForUnusedIdentifiersCheck(node);
         }
-        function checkBinaryExpression(node, contextualMapper) {
-            return checkBinaryLikeExpression(node.left, node.operatorToken, node.right, contextualMapper, node);
+        function checkClassDeclaration(node) {
+            if (!node.name && !(ts.getModifierFlags(node) & 512 /* Default */)) {
+                grammarErrorOnFirstToken(node, ts.Diagnostics.A_class_declaration_without_the_default_modifier_must_have_a_name);
+            }
+            checkClassLikeDeclaration(node);
+            ts.forEach(node.members, checkSourceElement);
+            registerForUnusedIdentifiersCheck(node);
         }
-        function checkBinaryLikeExpression(left, operatorToken, right, contextualMapper, errorNode) {
-            var operator = operatorToken.kind;
-            if (operator === 56 /* EqualsToken */ && (left.kind === 171 /* ObjectLiteralExpression */ || left.kind === 170 /* ArrayLiteralExpression */)) {
-                return checkDestructuringAssignment(left, checkExpression(right, contextualMapper), contextualMapper);
+        function checkClassLikeDeclaration(node) {
+            checkGrammarClassLikeDeclaration(node);
+            checkDecorators(node);
+            if (node.name) {
+                checkTypeNameIsReserved(node.name, ts.Diagnostics.Class_name_cannot_be_0);
+                checkCollisionWithCapturedThisVariable(node, node.name);
+                checkCollisionWithCapturedNewTargetVariable(node, node.name);
+                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
+                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
             }
-            var leftType = checkExpression(left, contextualMapper);
-            var rightType = checkExpression(right, contextualMapper);
-            switch (operator) {
-                case 37 /* AsteriskToken */:
-                case 38 /* AsteriskAsteriskToken */:
-                case 59 /* AsteriskEqualsToken */:
-                case 60 /* AsteriskAsteriskEqualsToken */:
-                case 39 /* SlashToken */:
-                case 61 /* SlashEqualsToken */:
-                case 40 /* PercentToken */:
-                case 62 /* PercentEqualsToken */:
-                case 36 /* MinusToken */:
-                case 58 /* MinusEqualsToken */:
-                case 43 /* LessThanLessThanToken */:
-                case 63 /* LessThanLessThanEqualsToken */:
-                case 44 /* GreaterThanGreaterThanToken */:
-                case 64 /* GreaterThanGreaterThanEqualsToken */:
-                case 45 /* GreaterThanGreaterThanGreaterThanToken */:
-                case 65 /* GreaterThanGreaterThanGreaterThanEqualsToken */:
-                case 47 /* BarToken */:
-                case 67 /* BarEqualsToken */:
-                case 48 /* CaretToken */:
-                case 68 /* CaretEqualsToken */:
-                case 46 /* AmpersandToken */:
-                case 66 /* AmpersandEqualsToken */:
-                    if (leftType === silentNeverType || rightType === silentNeverType) {
-                        return silentNeverType;
-                    }
-                    // TypeScript 1.0 spec (April 2014): 4.19.1
-                    // These operators require their operands to be of type Any, the Number primitive type,
-                    // or an enum type. Operands of an enum type are treated
-                    // as having the primitive type Number. If one operand is the null or undefined value,
-                    // it is treated as having the type of the other operand.
-                    // The result is always of the Number primitive type.
-                    if (leftType.flags & 6144 /* Nullable */)
-                        leftType = rightType;
-                    if (rightType.flags & 6144 /* Nullable */)
-                        rightType = leftType;
-                    leftType = getNonNullableType(leftType);
-                    rightType = getNonNullableType(rightType);
-                    var suggestedOperator = void 0;
-                    // if a user tries to apply a bitwise operator to 2 boolean operands
-                    // try and return them a helpful suggestion
-                    if ((leftType.flags & 136 /* BooleanLike */) &&
-                        (rightType.flags & 136 /* BooleanLike */) &&
-                        (suggestedOperator = getSuggestedBooleanOperator(operatorToken.kind)) !== undefined) {
-                        error(errorNode || operatorToken, ts.Diagnostics.The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead, ts.tokenToString(operatorToken.kind), ts.tokenToString(suggestedOperator));
-                    }
-                    else {
-                        // otherwise just check each operand separately and report errors as normal
-                        var leftOk = checkArithmeticOperandType(left, leftType, ts.Diagnostics.The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type);
-                        var rightOk = checkArithmeticOperandType(right, rightType, ts.Diagnostics.The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type);
-                        if (leftOk && rightOk) {
-                            checkAssignmentOperator(numberType);
+            checkTypeParameters(node.typeParameters);
+            checkExportsOnMergedDeclarations(node);
+            var symbol = getSymbolOfNode(node);
+            var type = getDeclaredTypeOfSymbol(symbol);
+            var typeWithThis = getTypeWithThisArgument(type);
+            var staticType = getTypeOfSymbol(symbol);
+            checkTypeParameterListsIdentical(symbol);
+            checkClassForDuplicateDeclarations(node);
+            // Only check for reserved static identifiers on non-ambient context.
+            if (!ts.isInAmbientContext(node)) {
+                checkClassForStaticPropertyNameConflicts(node);
+            }
+            var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
+            if (baseTypeNode) {
+                if (languageVersion < 2 /* ES2015 */) {
+                    checkExternalEmitHelpers(baseTypeNode.parent, 1 /* Extends */);
+                }
+                var baseTypes = getBaseTypes(type);
+                if (baseTypes.length && produceDiagnostics) {
+                    var baseType_1 = baseTypes[0];
+                    var baseConstructorType = getBaseConstructorTypeOfClass(type);
+                    var staticBaseType = getApparentType(baseConstructorType);
+                    checkBaseTypeAccessibility(staticBaseType, baseTypeNode);
+                    checkSourceElement(baseTypeNode.expression);
+                    if (ts.some(baseTypeNode.typeArguments)) {
+                        ts.forEach(baseTypeNode.typeArguments, checkSourceElement);
+                        for (var _i = 0, _a = getConstructorsForTypeArguments(staticBaseType, baseTypeNode.typeArguments, baseTypeNode); _i < _a.length; _i++) {
+                            var constructor = _a[_i];
+                            if (!checkTypeArgumentConstraints(constructor.typeParameters, baseTypeNode.typeArguments)) {
+                                break;
+                            }
                         }
                     }
-                    return numberType;
-                case 35 /* PlusToken */:
-                case 57 /* PlusEqualsToken */:
-                    if (leftType === silentNeverType || rightType === silentNeverType) {
-                        return silentNeverType;
-                    }
-                    // TypeScript 1.0 spec (April 2014): 4.19.2
-                    // The binary + operator requires both operands to be of the Number primitive type or an enum type,
-                    // or at least one of the operands to be of type Any or the String primitive type.
-                    // If one operand is the null or undefined value, it is treated as having the type of the other operand.
-                    if (leftType.flags & 6144 /* Nullable */)
-                        leftType = rightType;
-                    if (rightType.flags & 6144 /* Nullable */)
-                        rightType = leftType;
-                    leftType = getNonNullableType(leftType);
-                    rightType = getNonNullableType(rightType);
-                    var resultType = void 0;
-                    if (isTypeOfKind(leftType, 340 /* NumberLike */) && isTypeOfKind(rightType, 340 /* NumberLike */)) {
-                        // Operands of an enum type are treated as having the primitive type Number.
-                        // If both operands are of the Number primitive type, the result is of the Number primitive type.
-                        resultType = numberType;
+                    checkTypeAssignableTo(typeWithThis, getTypeWithThisArgument(baseType_1, type.thisType), node.name || node, ts.Diagnostics.Class_0_incorrectly_extends_base_class_1);
+                    checkTypeAssignableTo(staticType, getTypeWithoutSignatures(staticBaseType), node.name || node, ts.Diagnostics.Class_static_side_0_incorrectly_extends_base_class_static_side_1);
+                    if (baseConstructorType.flags & 540672 /* TypeVariable */ && !isMixinConstructorType(staticType)) {
+                        error(node.name || node, ts.Diagnostics.A_mixin_class_must_have_a_constructor_with_a_single_rest_parameter_of_type_any);
                     }
-                    else {
-                        if (isTypeOfKind(leftType, 34 /* StringLike */) || isTypeOfKind(rightType, 34 /* StringLike */)) {
-                            // If one or both operands are of the String primitive type, the result is of the String primitive type.
-                            resultType = stringType;
-                        }
-                        else if (isTypeAny(leftType) || isTypeAny(rightType)) {
-                            // Otherwise, the result is of type Any.
-                            // NOTE: unknown type here denotes error type. Old compiler treated this case as any type so do we.
-                            resultType = leftType === unknownType || rightType === unknownType ? unknownType : anyType;
-                        }
-                        // Symbols are not allowed at all in arithmetic expressions
-                        if (resultType && !checkForDisallowedESSymbolOperand(operator)) {
-                            return resultType;
+                    if (!(staticBaseType.symbol && staticBaseType.symbol.flags & 32 /* Class */) && !(baseConstructorType.flags & 540672 /* TypeVariable */)) {
+                        // When the static base type is a "class-like" constructor function (but not actually a class), we verify
+                        // that all instantiated base constructor signatures return the same type. We can simply compare the type
+                        // references (as opposed to checking the structure of the types) because elsewhere we have already checked
+                        // that the base type is a class or interface type (and not, for example, an anonymous object type).
+                        var constructors = getInstantiatedConstructorsForTypeArguments(staticBaseType, baseTypeNode.typeArguments, baseTypeNode);
+                        if (ts.forEach(constructors, function (sig) { return getReturnTypeOfSignature(sig) !== baseType_1; })) {
+                            error(baseTypeNode.expression, ts.Diagnostics.Base_constructors_must_all_have_the_same_return_type);
                         }
                     }
-                    if (!resultType) {
-                        reportOperatorError();
-                        return anyType;
-                    }
-                    if (operator === 57 /* PlusEqualsToken */) {
-                        checkAssignmentOperator(resultType);
+                    checkKindsOfPropertyMemberOverrides(type, baseType_1);
+                }
+            }
+            var implementedTypeNodes = ts.getClassImplementsHeritageClauseElements(node);
+            if (implementedTypeNodes) {
+                for (var _b = 0, implementedTypeNodes_1 = implementedTypeNodes; _b < implementedTypeNodes_1.length; _b++) {
+                    var typeRefNode = implementedTypeNodes_1[_b];
+                    if (!ts.isEntityNameExpression(typeRefNode.expression)) {
+                        error(typeRefNode.expression, ts.Diagnostics.A_class_can_only_implement_an_identifier_Slashqualified_name_with_optional_type_arguments);
                     }
-                    return resultType;
-                case 25 /* LessThanToken */:
-                case 27 /* GreaterThanToken */:
-                case 28 /* LessThanEqualsToken */:
-                case 29 /* GreaterThanEqualsToken */:
-                    if (checkForDisallowedESSymbolOperand(operator)) {
-                        if (!isTypeComparableTo(leftType, rightType) && !isTypeComparableTo(rightType, leftType)) {
-                            reportOperatorError();
+                    checkTypeReferenceNode(typeRefNode);
+                    if (produceDiagnostics) {
+                        var t = getTypeFromTypeNode(typeRefNode);
+                        if (t !== unknownType) {
+                            if (isValidBaseType(t)) {
+                                checkTypeAssignableTo(typeWithThis, getTypeWithThisArgument(t, type.thisType), node.name || node, ts.Diagnostics.Class_0_incorrectly_implements_interface_1);
+                            }
+                            else {
+                                error(typeRefNode, ts.Diagnostics.A_class_may_only_implement_another_class_or_interface);
+                            }
                         }
                     }
-                    return booleanType;
-                case 30 /* EqualsEqualsToken */:
-                case 31 /* ExclamationEqualsToken */:
-                case 32 /* EqualsEqualsEqualsToken */:
-                case 33 /* ExclamationEqualsEqualsToken */:
-                    var leftIsLiteral = isLiteralType(leftType);
-                    var rightIsLiteral = isLiteralType(rightType);
-                    if (!leftIsLiteral || !rightIsLiteral) {
-                        leftType = leftIsLiteral ? getBaseTypeOfLiteralType(leftType) : leftType;
-                        rightType = rightIsLiteral ? getBaseTypeOfLiteralType(rightType) : rightType;
-                    }
-                    if (!isTypeEqualityComparableTo(leftType, rightType) && !isTypeEqualityComparableTo(rightType, leftType)) {
-                        reportOperatorError();
-                    }
-                    return booleanType;
-                case 91 /* InstanceOfKeyword */:
-                    return checkInstanceOfExpression(left, right, leftType, rightType);
-                case 90 /* InKeyword */:
-                    return checkInExpression(left, right, leftType, rightType);
-                case 51 /* AmpersandAmpersandToken */:
-                    return getTypeFacts(leftType) & 1048576 /* Truthy */ ?
-                        includeFalsyTypes(rightType, getFalsyFlags(strictNullChecks ? leftType : getBaseTypeOfLiteralType(rightType))) :
-                        leftType;
-                case 52 /* BarBarToken */:
-                    return getTypeFacts(leftType) & 2097152 /* Falsy */ ?
-                        getBestChoiceType(removeDefinitelyFalsyTypes(leftType), rightType) :
-                        leftType;
-                case 56 /* EqualsToken */:
-                    checkAssignmentOperator(rightType);
-                    return getRegularTypeOfObjectLiteral(rightType);
-                case 24 /* CommaToken */:
-                    if (!compilerOptions.allowUnreachableCode && isSideEffectFree(left)) {
-                        error(left, ts.Diagnostics.Left_side_of_comma_operator_is_unused_and_has_no_side_effects);
-                    }
-                    return rightType;
-            }
-            // Return true if there was no error, false if there was an error.
-            function checkForDisallowedESSymbolOperand(operator) {
-                var offendingSymbolOperand = maybeTypeOfKind(leftType, 512 /* ESSymbol */) ? left :
-                    maybeTypeOfKind(rightType, 512 /* ESSymbol */) ? right :
-                        undefined;
-                if (offendingSymbolOperand) {
-                    error(offendingSymbolOperand, ts.Diagnostics.The_0_operator_cannot_be_applied_to_type_symbol, ts.tokenToString(operator));
-                    return false;
                 }
-                return true;
             }
-            function getSuggestedBooleanOperator(operator) {
-                switch (operator) {
-                    case 47 /* BarToken */:
-                    case 67 /* BarEqualsToken */:
-                        return 52 /* BarBarToken */;
-                    case 48 /* CaretToken */:
-                    case 68 /* CaretEqualsToken */:
-                        return 33 /* ExclamationEqualsEqualsToken */;
-                    case 46 /* AmpersandToken */:
-                    case 66 /* AmpersandEqualsToken */:
-                        return 51 /* AmpersandAmpersandToken */;
-                    default:
-                        return undefined;
-                }
+            if (produceDiagnostics) {
+                checkIndexConstraints(type);
+                checkTypeForDuplicateIndexSignatures(node);
             }
-            function checkAssignmentOperator(valueType) {
-                if (produceDiagnostics && operator >= 56 /* FirstAssignment */ && operator <= 68 /* LastAssignment */) {
-                    // TypeScript 1.0 spec (April 2014): 4.17
-                    // An assignment of the form
-                    //    VarExpr = ValueExpr
-                    // requires VarExpr to be classified as a reference
-                    // A compound assignment furthermore requires VarExpr to be classified as a reference (section 4.1)
-                    // and the type of the non - compound operation to be assignable to the type of VarExpr.
-                    var ok = checkReferenceExpression(left, ts.Diagnostics.Invalid_left_hand_side_of_assignment_expression, ts.Diagnostics.Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property);
-                    // Use default messages
-                    if (ok) {
-                        // to avoid cascading errors check assignability only if 'isReference' check succeeded and no errors were reported
-                        checkTypeAssignableTo(valueType, leftType, left, /*headMessage*/ undefined);
+        }
+        function checkBaseTypeAccessibility(type, node) {
+            var signatures = getSignaturesOfType(type, 1 /* Construct */);
+            if (signatures.length) {
+                var declaration = signatures[0].declaration;
+                if (declaration && ts.getModifierFlags(declaration) & 8 /* Private */) {
+                    var typeClassDeclaration = getClassLikeDeclarationOfSymbol(type.symbol);
+                    if (!isNodeWithinClass(node, typeClassDeclaration)) {
+                        error(node, ts.Diagnostics.Cannot_extend_a_class_0_Class_constructor_is_marked_as_private, getFullyQualifiedName(type.symbol));
                     }
                 }
             }
-            function reportOperatorError() {
-                error(errorNode || operatorToken, ts.Diagnostics.Operator_0_cannot_be_applied_to_types_1_and_2, ts.tokenToString(operatorToken.kind), typeToString(leftType), typeToString(rightType));
-            }
         }
-        function isYieldExpressionInClass(node) {
-            var current = node;
-            var parent = node.parent;
-            while (parent) {
-                if (ts.isFunctionLike(parent) && current === parent.body) {
-                    return false;
-                }
-                else if (ts.isClassLike(current)) {
-                    return true;
-                }
-                current = parent;
-                parent = parent.parent;
-            }
-            return false;
+        function getTargetSymbol(s) {
+            // if symbol is instantiated its flags are not copied from the 'target'
+            // so we'll need to get back original 'target' symbol to work with correct set of flags
+            return ts.getCheckFlags(s) & 1 /* Instantiated */ ? s.target : s;
         }
-        function checkYieldExpression(node) {
-            // Grammar checking
-            if (produceDiagnostics) {
-                if (!(node.flags & 65536 /* YieldContext */) || isYieldExpressionInClass(node)) {
-                    grammarErrorOnFirstToken(node, ts.Diagnostics.A_yield_expression_is_only_allowed_in_a_generator_body);
-                }
-                if (isInParameterInitializerBeforeContainingFunction(node)) {
-                    error(node, ts.Diagnostics.yield_expressions_cannot_be_used_in_a_parameter_initializer);
+        function getClassLikeDeclarationOfSymbol(symbol) {
+            return ts.forEach(symbol.declarations, function (d) { return ts.isClassLike(d) ? d : undefined; });
+        }
+        function getClassOrInterfaceDeclarationsOfSymbol(symbol) {
+            return ts.filter(symbol.declarations, function (d) {
+                return d.kind === 229 /* ClassDeclaration */ || d.kind === 230 /* InterfaceDeclaration */;
+            });
+        }
+        function checkKindsOfPropertyMemberOverrides(type, baseType) {
+            // TypeScript 1.0 spec (April 2014): 8.2.3
+            // A derived class inherits all members from its base class it doesn't override.
+            // Inheritance means that a derived class implicitly contains all non - overridden members of the base class.
+            // Both public and private property members are inherited, but only public property members can be overridden.
+            // A property member in a derived class is said to override a property member in a base class
+            // when the derived class property member has the same name and kind(instance or static)
+            // as the base class property member.
+            // The type of an overriding property member must be assignable(section 3.8.4)
+            // to the type of the overridden property member, or otherwise a compile - time error occurs.
+            // Base class instance member functions can be overridden by derived class instance member functions,
+            // but not by other kinds of members.
+            // Base class instance member variables and accessors can be overridden by
+            // derived class instance member variables and accessors, but not by other kinds of members.
+            // NOTE: assignability is checked in checkClassDeclaration
+            var baseProperties = getPropertiesOfType(baseType);
+            for (var _i = 0, baseProperties_1 = baseProperties; _i < baseProperties_1.length; _i++) {
+                var baseProperty = baseProperties_1[_i];
+                var base = getTargetSymbol(baseProperty);
+                if (base.flags & 16777216 /* Prototype */) {
+                    continue;
                 }
-            }
-            if (node.expression) {
-                var func = ts.getContainingFunction(node);
-                // If the user's code is syntactically correct, the func should always have a star. After all,
-                // we are in a yield context.
-                if (func && func.asteriskToken) {
-                    var expressionType = checkExpressionCached(node.expression, /*contextualMapper*/ undefined);
-                    var expressionElementType = void 0;
-                    var nodeIsYieldStar = !!node.asteriskToken;
-                    if (nodeIsYieldStar) {
-                        expressionElementType = checkElementTypeOfIterable(expressionType, node.expression);
+                var derived = getTargetSymbol(getPropertyOfObjectType(type, base.name));
+                var baseDeclarationFlags = ts.getDeclarationModifierFlagsFromSymbol(base);
+                ts.Debug.assert(!!derived, "derived should point to something, even if it is the base class' declaration.");
+                if (derived) {
+                    // In order to resolve whether the inherited method was overridden in the base class or not,
+                    // we compare the Symbols obtained. Since getTargetSymbol returns the symbol on the *uninstantiated*
+                    // type declaration, derived and base resolve to the same symbol even in the case of generic classes.
+                    if (derived === base) {
+                        // derived class inherits base without override/redeclaration
+                        var derivedClassDecl = getClassLikeDeclarationOfSymbol(type.symbol);
+                        // It is an error to inherit an abstract member without implementing it or being declared abstract.
+                        // If there is no declaration for the derived class (as in the case of class expressions),
+                        // then the class cannot be declared abstract.
+                        if (baseDeclarationFlags & 128 /* Abstract */ && (!derivedClassDecl || !(ts.getModifierFlags(derivedClassDecl) & 128 /* Abstract */))) {
+                            if (derivedClassDecl.kind === 199 /* ClassExpression */) {
+                                error(derivedClassDecl, ts.Diagnostics.Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1, symbolToString(baseProperty), typeToString(baseType));
+                            }
+                            else {
+                                error(derivedClassDecl, ts.Diagnostics.Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2, typeToString(type), symbolToString(baseProperty), typeToString(baseType));
+                            }
+                        }
                     }
-                    // There is no point in doing an assignability check if the function
-                    // has no explicit return type because the return type is directly computed
-                    // from the yield expressions.
-                    if (func.type) {
-                        var signatureElementType = getElementTypeOfIterableIterator(getTypeFromTypeNode(func.type)) || anyType;
-                        if (nodeIsYieldStar) {
-                            checkTypeAssignableTo(expressionElementType, signatureElementType, node.expression, /*headMessage*/ undefined);
+                    else {
+                        // derived overrides base.
+                        var derivedDeclarationFlags = ts.getDeclarationModifierFlagsFromSymbol(derived);
+                        if (baseDeclarationFlags & 8 /* Private */ || derivedDeclarationFlags & 8 /* Private */) {
+                            // either base or derived property is private - not override, skip it
+                            continue;
+                        }
+                        if (isMethodLike(base) && isMethodLike(derived) || base.flags & 98308 /* PropertyOrAccessor */ && derived.flags & 98308 /* PropertyOrAccessor */) {
+                            // method is overridden with method or property/accessor is overridden with property/accessor - correct case
+                            continue;
+                        }
+                        var errorMessage = void 0;
+                        if (isMethodLike(base)) {
+                            if (derived.flags & 98304 /* Accessor */) {
+                                errorMessage = ts.Diagnostics.Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_accessor;
+                            }
+                            else {
+                                errorMessage = ts.Diagnostics.Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_property;
+                            }
+                        }
+                        else if (base.flags & 4 /* Property */) {
+                            errorMessage = ts.Diagnostics.Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_function;
                         }
                         else {
-                            checkTypeAssignableTo(expressionType, signatureElementType, node.expression, /*headMessage*/ undefined);
+                            errorMessage = ts.Diagnostics.Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_function;
                         }
+                        error(ts.getNameOfDeclaration(derived.valueDeclaration) || derived.valueDeclaration, errorMessage, typeToString(baseType), symbolToString(base), typeToString(type));
                     }
                 }
             }
-            // Both yield and yield* expressions have type 'any'
-            return anyType;
-        }
-        function checkConditionalExpression(node, contextualMapper) {
-            checkExpression(node.condition);
-            var type1 = checkExpression(node.whenTrue, contextualMapper);
-            var type2 = checkExpression(node.whenFalse, contextualMapper);
-            return getBestChoiceType(type1, type2);
         }
-        function checkLiteralExpression(node) {
-            if (node.kind === 8 /* NumericLiteral */) {
-                checkGrammarNumericLiteral(node);
-            }
-            switch (node.kind) {
-                case 9 /* StringLiteral */:
-                    return getFreshTypeOfLiteralType(getLiteralTypeForText(32 /* StringLiteral */, node.text));
-                case 8 /* NumericLiteral */:
-                    return getFreshTypeOfLiteralType(getLiteralTypeForText(64 /* NumberLiteral */, node.text));
-                case 99 /* TrueKeyword */:
-                    return trueType;
-                case 84 /* FalseKeyword */:
-                    return falseType;
+        function checkInheritedPropertiesAreIdentical(type, typeNode) {
+            var baseTypes = getBaseTypes(type);
+            if (baseTypes.length < 2) {
+                return true;
             }
-        }
-        function checkTemplateExpression(node) {
-            // We just want to check each expressions, but we are unconcerned with
-            // the type of each expression, as any value may be coerced into a string.
-            // It is worth asking whether this is what we really want though.
-            // A place where we actually *are* concerned with the expressions' types are
-            // in tagged templates.
-            ts.forEach(node.templateSpans, function (templateSpan) {
-                checkExpression(templateSpan.expression);
-            });
-            return stringType;
-        }
-        function checkExpressionWithContextualType(node, contextualType, contextualMapper) {
-            var saveContextualType = node.contextualType;
-            node.contextualType = contextualType;
-            var result = checkExpression(node, contextualMapper);
-            node.contextualType = saveContextualType;
-            return result;
-        }
-        function checkExpressionCached(node, contextualMapper) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                // When computing a type that we're going to cache, we need to ignore any ongoing control flow
-                // analysis because variables may have transient types in indeterminable states. Moving flowLoopStart
-                // to the top of the stack ensures all transient types are computed from a known point.
-                var saveFlowLoopStart = flowLoopStart;
-                flowLoopStart = flowLoopCount;
-                links.resolvedType = checkExpression(node, contextualMapper);
-                flowLoopStart = saveFlowLoopStart;
+            var seen = ts.createMap();
+            ts.forEach(resolveDeclaredMembers(type).declaredProperties, function (p) { seen.set(p.name, { prop: p, containingType: type }); });
+            var ok = true;
+            for (var _i = 0, baseTypes_2 = baseTypes; _i < baseTypes_2.length; _i++) {
+                var base = baseTypes_2[_i];
+                var properties = getPropertiesOfType(getTypeWithThisArgument(base, type.thisType));
+                for (var _a = 0, properties_7 = properties; _a < properties_7.length; _a++) {
+                    var prop = properties_7[_a];
+                    var existing = seen.get(prop.name);
+                    if (!existing) {
+                        seen.set(prop.name, { prop: prop, containingType: base });
+                    }
+                    else {
+                        var isInheritedProperty = existing.containingType !== type;
+                        if (isInheritedProperty && !isPropertyIdenticalTo(existing.prop, prop)) {
+                            ok = false;
+                            var typeName1 = typeToString(existing.containingType);
+                            var typeName2 = typeToString(base);
+                            var errorInfo = ts.chainDiagnosticMessages(/*details*/ undefined, ts.Diagnostics.Named_property_0_of_types_1_and_2_are_not_identical, symbolToString(prop), typeName1, typeName2);
+                            errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.Interface_0_cannot_simultaneously_extend_types_1_and_2, typeToString(type), typeName1, typeName2);
+                            diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(typeNode, errorInfo));
+                        }
+                    }
+                }
             }
-            return links.resolvedType;
-        }
-        function isTypeAssertion(node) {
-            node = skipParenthesizedNodes(node);
-            return node.kind === 177 /* TypeAssertionExpression */ || node.kind === 195 /* AsExpression */;
-        }
-        function checkDeclarationInitializer(declaration) {
-            var type = checkExpressionCached(declaration.initializer);
-            return ts.getCombinedNodeFlags(declaration) & 2 /* Const */ ||
-                ts.getCombinedModifierFlags(declaration) & 64 /* Readonly */ ||
-                isTypeAssertion(declaration.initializer) ? type : getWidenedLiteralType(type);
+            return ok;
         }
-        function isLiteralContextualType(contextualType) {
-            if (contextualType) {
-                if (contextualType.flags & 16384 /* TypeParameter */) {
-                    var apparentType = getApparentTypeOfTypeParameter(contextualType);
-                    // If the type parameter is constrained to the base primitive type we're checking for,
-                    // consider this a literal context. For example, given a type parameter 'T extends string',
-                    // this causes us to infer string literal types for T.
-                    if (apparentType.flags & (2 /* String */ | 4 /* Number */ | 8 /* Boolean */ | 16 /* Enum */)) {
-                        return true;
+        function checkInterfaceDeclaration(node) {
+            // Grammar checking
+            checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarInterfaceDeclaration(node);
+            checkTypeParameters(node.typeParameters);
+            if (produceDiagnostics) {
+                checkTypeNameIsReserved(node.name, ts.Diagnostics.Interface_name_cannot_be_0);
+                checkExportsOnMergedDeclarations(node);
+                var symbol = getSymbolOfNode(node);
+                checkTypeParameterListsIdentical(symbol);
+                // Only check this symbol once
+                var firstInterfaceDecl = ts.getDeclarationOfKind(symbol, 230 /* InterfaceDeclaration */);
+                if (node === firstInterfaceDecl) {
+                    var type = getDeclaredTypeOfSymbol(symbol);
+                    var typeWithThis = getTypeWithThisArgument(type);
+                    // run subsequent checks only if first set succeeded
+                    if (checkInheritedPropertiesAreIdentical(type, node.name)) {
+                        for (var _i = 0, _a = getBaseTypes(type); _i < _a.length; _i++) {
+                            var baseType = _a[_i];
+                            checkTypeAssignableTo(typeWithThis, getTypeWithThisArgument(baseType, type.thisType), node.name, ts.Diagnostics.Interface_0_incorrectly_extends_interface_1);
+                        }
+                        checkIndexConstraints(type);
                     }
-                    contextualType = apparentType;
                 }
-                return maybeTypeOfKind(contextualType, 480 /* Literal */);
+                checkObjectTypeForDuplicateDeclarations(node);
             }
-            return false;
-        }
-        function checkExpressionForMutableLocation(node, contextualMapper) {
-            var type = checkExpression(node, contextualMapper);
-            return isTypeAssertion(node) || isLiteralContextualType(getContextualType(node)) ? type : getWidenedLiteralType(type);
-        }
-        function checkPropertyAssignment(node, contextualMapper) {
-            // Do not use hasDynamicName here, because that returns false for well known symbols.
-            // We want to perform checkComputedPropertyName for all computed properties, including
-            // well known symbols.
-            if (node.name.kind === 140 /* ComputedPropertyName */) {
-                checkComputedPropertyName(node.name);
+            ts.forEach(ts.getInterfaceBaseTypeNodes(node), function (heritageElement) {
+                if (!ts.isEntityNameExpression(heritageElement.expression)) {
+                    error(heritageElement.expression, ts.Diagnostics.An_interface_can_only_extend_an_identifier_Slashqualified_name_with_optional_type_arguments);
+                }
+                checkTypeReferenceNode(heritageElement);
+            });
+            ts.forEach(node.members, checkSourceElement);
+            if (produceDiagnostics) {
+                checkTypeForDuplicateIndexSignatures(node);
+                registerForUnusedIdentifiersCheck(node);
             }
-            return checkExpressionForMutableLocation(node.initializer, contextualMapper);
         }
-        function checkObjectLiteralMethod(node, contextualMapper) {
+        function checkTypeAliasDeclaration(node) {
             // Grammar checking
-            checkGrammarMethod(node);
-            // Do not use hasDynamicName here, because that returns false for well known symbols.
-            // We want to perform checkComputedPropertyName for all computed properties, including
-            // well known symbols.
-            if (node.name.kind === 140 /* ComputedPropertyName */) {
-                checkComputedPropertyName(node.name);
-            }
-            var uninstantiatedType = checkFunctionExpressionOrObjectLiteralMethod(node, contextualMapper);
-            return instantiateTypeWithSingleGenericCallSignature(node, uninstantiatedType, contextualMapper);
+            checkGrammarDecorators(node) || checkGrammarModifiers(node);
+            checkTypeNameIsReserved(node.name, ts.Diagnostics.Type_alias_name_cannot_be_0);
+            checkTypeParameters(node.typeParameters);
+            checkSourceElement(node.type);
         }
-        function instantiateTypeWithSingleGenericCallSignature(node, type, contextualMapper) {
-            if (isInferentialContext(contextualMapper)) {
-                var signature = getSingleCallSignature(type);
-                if (signature && signature.typeParameters) {
-                    var contextualType = getApparentTypeOfContextualType(node);
-                    if (contextualType) {
-                        var contextualSignature = getSingleCallSignature(contextualType);
-                        if (contextualSignature && !contextualSignature.typeParameters) {
-                            return getOrCreateTypeFromSignature(instantiateSignatureInContextOf(signature, contextualSignature, contextualMapper));
-                        }
-                    }
+        function computeEnumMemberValues(node) {
+            var nodeLinks = getNodeLinks(node);
+            if (!(nodeLinks.flags & 16384 /* EnumValuesComputed */)) {
+                nodeLinks.flags |= 16384 /* EnumValuesComputed */;
+                var autoValue = 0;
+                for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
+                    var member = _a[_i];
+                    var value = computeMemberValue(member, autoValue);
+                    getNodeLinks(member).enumMemberValue = value;
+                    autoValue = typeof value === "number" ? value + 1 : undefined;
                 }
             }
-            return type;
         }
-        // Checks an expression and returns its type. The contextualMapper parameter serves two purposes: When
-        // contextualMapper is not undefined and not equal to the identityMapper function object it indicates that the
-        // expression is being inferentially typed (section 4.15.2 in spec) and provides the type mapper to use in
-        // conjunction with the generic contextual type. When contextualMapper is equal to the identityMapper function
-        // object, it serves as an indicator that all contained function and arrow expressions should be considered to
-        // have the wildcard function type; this form of type check is used during overload resolution to exclude
-        // contextually typed function and arrow expressions in the initial phase.
-        function checkExpression(node, contextualMapper) {
-            var type;
-            if (node.kind === 139 /* QualifiedName */) {
-                type = checkQualifiedName(node);
+        function computeMemberValue(member, autoValue) {
+            if (isComputedNonLiteralName(member.name)) {
+                error(member.name, ts.Diagnostics.Computed_property_names_are_not_allowed_in_enums);
             }
             else {
-                var uninstantiatedType = checkExpressionWorker(node, contextualMapper);
-                type = instantiateTypeWithSingleGenericCallSignature(node, uninstantiatedType, contextualMapper);
-            }
-            if (isConstEnumObjectType(type)) {
-                // enum object type for const enums are only permitted in:
-                // - 'left' in property access
-                // - 'object' in indexed access
-                // - target in rhs of import statement
-                var ok = (node.parent.kind === 172 /* PropertyAccessExpression */ && node.parent.expression === node) ||
-                    (node.parent.kind === 173 /* ElementAccessExpression */ && node.parent.expression === node) ||
-                    ((node.kind === 69 /* Identifier */ || node.kind === 139 /* QualifiedName */) && isInRightSideOfImportOrExportAssignment(node));
-                if (!ok) {
-                    error(node, ts.Diagnostics.const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_import_declaration_or_export_assignment);
+                var text = ts.getTextOfPropertyName(member.name);
+                if (isNumericLiteralName(text) && !isInfinityOrNaNString(text)) {
+                    error(member.name, ts.Diagnostics.An_enum_member_cannot_have_a_numeric_name);
                 }
             }
-            return type;
-        }
-        function checkExpressionWorker(node, contextualMapper) {
-            switch (node.kind) {
-                case 69 /* Identifier */:
-                    return checkIdentifier(node);
-                case 97 /* ThisKeyword */:
-                    return checkThisExpression(node);
-                case 95 /* SuperKeyword */:
-                    return checkSuperExpression(node);
-                case 93 /* NullKeyword */:
-                    return nullWideningType;
-                case 9 /* StringLiteral */:
-                case 8 /* NumericLiteral */:
-                case 99 /* TrueKeyword */:
-                case 84 /* FalseKeyword */:
-                    return checkLiteralExpression(node);
-                case 189 /* TemplateExpression */:
-                    return checkTemplateExpression(node);
-                case 11 /* NoSubstitutionTemplateLiteral */:
-                    return stringType;
-                case 10 /* RegularExpressionLiteral */:
-                    return globalRegExpType;
-                case 170 /* ArrayLiteralExpression */:
-                    return checkArrayLiteral(node, contextualMapper);
-                case 171 /* ObjectLiteralExpression */:
-                    return checkObjectLiteral(node, contextualMapper);
-                case 172 /* PropertyAccessExpression */:
-                    return checkPropertyAccessExpression(node);
-                case 173 /* ElementAccessExpression */:
-                    return checkIndexedAccess(node);
-                case 174 /* CallExpression */:
-                case 175 /* NewExpression */:
-                    return checkCallExpression(node);
-                case 176 /* TaggedTemplateExpression */:
-                    return checkTaggedTemplateExpression(node);
-                case 178 /* ParenthesizedExpression */:
-                    return checkExpression(node.expression, contextualMapper);
-                case 192 /* ClassExpression */:
-                    return checkClassExpression(node);
-                case 179 /* FunctionExpression */:
-                case 180 /* ArrowFunction */:
-                    return checkFunctionExpressionOrObjectLiteralMethod(node, contextualMapper);
-                case 182 /* TypeOfExpression */:
-                    return checkTypeOfExpression(node);
-                case 177 /* TypeAssertionExpression */:
-                case 195 /* AsExpression */:
-                    return checkAssertion(node);
-                case 196 /* NonNullExpression */:
-                    return checkNonNullAssertion(node);
-                case 181 /* DeleteExpression */:
-                    return checkDeleteExpression(node);
-                case 183 /* VoidExpression */:
-                    return checkVoidExpression(node);
-                case 184 /* AwaitExpression */:
-                    return checkAwaitExpression(node);
-                case 185 /* PrefixUnaryExpression */:
-                    return checkPrefixUnaryExpression(node);
-                case 186 /* PostfixUnaryExpression */:
-                    return checkPostfixUnaryExpression(node);
-                case 187 /* BinaryExpression */:
-                    return checkBinaryExpression(node, contextualMapper);
-                case 188 /* ConditionalExpression */:
-                    return checkConditionalExpression(node, contextualMapper);
-                case 191 /* SpreadElementExpression */:
-                    return checkSpreadElementExpression(node, contextualMapper);
-                case 193 /* OmittedExpression */:
-                    return undefinedWideningType;
-                case 190 /* YieldExpression */:
-                    return checkYieldExpression(node);
-                case 248 /* JsxExpression */:
-                    return checkJsxExpression(node);
-                case 241 /* JsxElement */:
-                    return checkJsxElement(node);
-                case 242 /* JsxSelfClosingElement */:
-                    return checkJsxSelfClosingElement(node);
-                case 243 /* JsxOpeningElement */:
-                    ts.Debug.fail("Shouldn't ever directly check a JsxOpeningElement");
+            if (member.initializer) {
+                return computeConstantValue(member);
             }
-            return unknownType;
-        }
-        // DECLARATION AND STATEMENT TYPE CHECKING
-        function checkTypeParameter(node) {
-            // Grammar Checking
-            if (node.expression) {
-                grammarErrorOnFirstToken(node.expression, ts.Diagnostics.Type_expected);
+            // In ambient enum declarations that specify no const modifier, enum member declarations that omit
+            // a value are considered computed members (as opposed to having auto-incremented values).
+            if (ts.isInAmbientContext(member.parent) && !ts.isConst(member.parent)) {
+                return undefined;
             }
-            checkSourceElement(node.constraint);
-            getConstraintOfTypeParameter(getDeclaredTypeOfTypeParameter(getSymbolOfNode(node)));
-            if (produceDiagnostics) {
-                checkTypeNameIsReserved(node.name, ts.Diagnostics.Type_parameter_name_cannot_be_0);
+            // If the member declaration specifies no value, the member is considered a constant enum member.
+            // If the member is the first member in the enum declaration, it is assigned the value zero.
+            // Otherwise, it is assigned the value of the immediately preceding member plus one, and an error
+            // occurs if the immediately preceding member is not a constant enum member.
+            if (autoValue !== undefined) {
+                return autoValue;
             }
+            error(member.name, ts.Diagnostics.Enum_member_must_have_initializer);
+            return undefined;
         }
-        function checkParameter(node) {
-            // Grammar checking
-            // It is a SyntaxError if the Identifier "eval" or the Identifier "arguments" occurs as the
-            // Identifier in a PropertySetParameterList of a PropertyAssignment that is contained in strict code
-            // or if its FunctionBody is strict code(11.1.5).
-            // Grammar checking
-            checkGrammarDecorators(node) || checkGrammarModifiers(node);
-            checkVariableLikeDeclaration(node);
-            var func = ts.getContainingFunction(node);
-            if (ts.getModifierFlags(node) & 92 /* ParameterPropertyModifier */) {
-                func = ts.getContainingFunction(node);
-                if (!(func.kind === 148 /* Constructor */ && ts.nodeIsPresent(func.body))) {
-                    error(node, ts.Diagnostics.A_parameter_property_is_only_allowed_in_a_constructor_implementation);
+        function computeConstantValue(member) {
+            var enumKind = getEnumKind(getSymbolOfNode(member.parent));
+            var isConstEnum = ts.isConst(member.parent);
+            var initializer = member.initializer;
+            var value = enumKind === 1 /* Literal */ && !isLiteralEnumMember(member) ? undefined : evaluate(initializer);
+            if (value !== undefined) {
+                if (isConstEnum && typeof value === "number" && !isFinite(value)) {
+                    error(initializer, isNaN(value) ?
+                        ts.Diagnostics.const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN :
+                        ts.Diagnostics.const_enum_member_initializer_was_evaluated_to_a_non_finite_value);
                 }
             }
-            if (node.questionToken && ts.isBindingPattern(node.name) && func.body) {
-                error(node, ts.Diagnostics.A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature);
+            else if (enumKind === 1 /* Literal */) {
+                error(initializer, ts.Diagnostics.Computed_values_are_not_permitted_in_an_enum_with_string_valued_members);
+                return 0;
             }
-            if (node.name.text === "this") {
-                if (ts.indexOf(func.parameters, node) !== 0) {
-                    error(node, ts.Diagnostics.A_this_parameter_must_be_the_first_parameter);
-                }
-                if (func.kind === 148 /* Constructor */ || func.kind === 152 /* ConstructSignature */ || func.kind === 157 /* ConstructorType */) {
-                    error(node, ts.Diagnostics.A_constructor_cannot_have_a_this_parameter);
-                }
+            else if (isConstEnum) {
+                error(initializer, ts.Diagnostics.In_const_enum_declarations_member_initializer_must_be_constant_expression);
             }
-            // Only check rest parameter type if it's not a binding pattern. Since binding patterns are
-            // not allowed in a rest parameter, we already have an error from checkGrammarParameterList.
-            if (node.dotDotDotToken && !ts.isBindingPattern(node.name) && !isArrayType(getTypeOfSymbol(node.symbol))) {
-                error(node, ts.Diagnostics.A_rest_parameter_must_be_of_an_array_type);
+            else if (ts.isInAmbientContext(member.parent)) {
+                error(initializer, ts.Diagnostics.In_ambient_enum_declarations_member_initializer_must_be_constant_expression);
             }
-        }
-        function isSyntacticallyValidGenerator(node) {
-            if (!node.asteriskToken || !node.body) {
-                return false;
+            else {
+                // Only here do we need to check that the initializer is assignable to the enum type.
+                checkTypeAssignableTo(checkExpression(initializer), getDeclaredTypeOfSymbol(getSymbolOfNode(member.parent)), initializer, /*headMessage*/ undefined);
             }
-            return node.kind === 147 /* MethodDeclaration */ ||
-                node.kind === 220 /* FunctionDeclaration */ ||
-                node.kind === 179 /* FunctionExpression */;
-        }
-        function getTypePredicateParameterIndex(parameterList, parameter) {
-            if (parameterList) {
-                for (var i = 0; i < parameterList.length; i++) {
-                    var param = parameterList[i];
-                    if (param.name.kind === 69 /* Identifier */ &&
-                        param.name.text === parameter.text) {
-                        return i;
+            return value;
+            function evaluate(expr) {
+                switch (expr.kind) {
+                    case 192 /* PrefixUnaryExpression */:
+                        var value_1 = evaluate(expr.operand);
+                        if (typeof value_1 === "number") {
+                            switch (expr.operator) {
+                                case 37 /* PlusToken */: return value_1;
+                                case 38 /* MinusToken */: return -value_1;
+                                case 52 /* TildeToken */: return ~value_1;
+                            }
+                        }
+                        break;
+                    case 194 /* BinaryExpression */:
+                        var left = evaluate(expr.left);
+                        var right = evaluate(expr.right);
+                        if (typeof left === "number" && typeof right === "number") {
+                            switch (expr.operatorToken.kind) {
+                                case 49 /* BarToken */: return left | right;
+                                case 48 /* AmpersandToken */: return left & right;
+                                case 46 /* GreaterThanGreaterThanToken */: return left >> right;
+                                case 47 /* GreaterThanGreaterThanGreaterThanToken */: return left >>> right;
+                                case 45 /* LessThanLessThanToken */: return left << right;
+                                case 50 /* CaretToken */: return left ^ right;
+                                case 39 /* AsteriskToken */: return left * right;
+                                case 41 /* SlashToken */: return left / right;
+                                case 37 /* PlusToken */: return left + right;
+                                case 38 /* MinusToken */: return left - right;
+                                case 42 /* PercentToken */: return left % right;
+                            }
+                        }
+                        break;
+                    case 9 /* StringLiteral */:
+                        return expr.text;
+                    case 8 /* NumericLiteral */:
+                        checkGrammarNumericLiteral(expr);
+                        return +expr.text;
+                    case 185 /* ParenthesizedExpression */:
+                        return evaluate(expr.expression);
+                    case 71 /* Identifier */:
+                        return ts.nodeIsMissing(expr) ? 0 : evaluateEnumMember(expr, getSymbolOfNode(member.parent), expr.text);
+                    case 180 /* ElementAccessExpression */:
+                    case 179 /* PropertyAccessExpression */:
+                        if (isConstantMemberAccess(expr)) {
+                            var type = getTypeOfExpression(expr.expression);
+                            if (type.symbol && type.symbol.flags & 384 /* Enum */) {
+                                var name_31 = expr.kind === 179 /* PropertyAccessExpression */ ?
+                                    expr.name.text :
+                                    expr.argumentExpression.text;
+                                return evaluateEnumMember(expr, type.symbol, name_31);
+                            }
+                        }
+                        break;
+                }
+                return undefined;
+            }
+            function evaluateEnumMember(expr, enumSymbol, name) {
+                var memberSymbol = enumSymbol.exports.get(name);
+                if (memberSymbol) {
+                    var declaration = memberSymbol.valueDeclaration;
+                    if (declaration !== member) {
+                        if (isBlockScopedNameDeclaredBeforeUse(declaration, member)) {
+                            return getNodeLinks(declaration).enumMemberValue;
+                        }
+                        error(expr, ts.Diagnostics.A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums);
+                        return 0;
                     }
                 }
+                return undefined;
             }
-            return -1;
         }
-        function checkTypePredicate(node) {
-            var parent = getTypePredicateParent(node);
-            if (!parent) {
-                // The parent must not be valid.
-                error(node, ts.Diagnostics.A_type_predicate_is_only_allowed_in_return_type_position_for_functions_and_methods);
+        function isConstantMemberAccess(node) {
+            return node.kind === 71 /* Identifier */ ||
+                node.kind === 179 /* PropertyAccessExpression */ && isConstantMemberAccess(node.expression) ||
+                node.kind === 180 /* ElementAccessExpression */ && isConstantMemberAccess(node.expression) &&
+                    node.argumentExpression.kind === 9 /* StringLiteral */;
+        }
+        function checkEnumDeclaration(node) {
+            if (!produceDiagnostics) {
                 return;
             }
-            var typePredicate = getSignatureFromDeclaration(parent).typePredicate;
-            if (!typePredicate) {
-                return;
+            // Grammar checking
+            checkGrammarDecorators(node) || checkGrammarModifiers(node);
+            checkTypeNameIsReserved(node.name, ts.Diagnostics.Enum_name_cannot_be_0);
+            checkCollisionWithCapturedThisVariable(node, node.name);
+            checkCollisionWithCapturedNewTargetVariable(node, node.name);
+            checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
+            checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
+            checkExportsOnMergedDeclarations(node);
+            computeEnumMemberValues(node);
+            var enumIsConst = ts.isConst(node);
+            if (compilerOptions.isolatedModules && enumIsConst && ts.isInAmbientContext(node)) {
+                error(node.name, ts.Diagnostics.Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided);
             }
-            var parameterName = node.parameterName;
-            if (ts.isThisTypePredicate(typePredicate)) {
-                getTypeFromThisTypeNode(parameterName);
+            // Spec 2014 - Section 9.3:
+            // It isn't possible for one enum declaration to continue the automatic numbering sequence of another,
+            // and when an enum type has multiple declarations, only one declaration is permitted to omit a value
+            // for the first member.
+            //
+            // Only perform this check once per symbol
+            var enumSymbol = getSymbolOfNode(node);
+            var firstDeclaration = ts.getDeclarationOfKind(enumSymbol, node.kind);
+            if (node === firstDeclaration) {
+                if (enumSymbol.declarations.length > 1) {
+                    // check that const is placed\omitted on all enum declarations
+                    ts.forEach(enumSymbol.declarations, function (decl) {
+                        if (ts.isConstEnumDeclaration(decl) !== enumIsConst) {
+                            error(ts.getNameOfDeclaration(decl), ts.Diagnostics.Enum_declarations_must_all_be_const_or_non_const);
+                        }
+                    });
+                }
+                var seenEnumMissingInitialInitializer_1 = false;
+                ts.forEach(enumSymbol.declarations, function (declaration) {
+                    // return true if we hit a violation of the rule, false otherwise
+                    if (declaration.kind !== 232 /* EnumDeclaration */) {
+                        return false;
+                    }
+                    var enumDeclaration = declaration;
+                    if (!enumDeclaration.members.length) {
+                        return false;
+                    }
+                    var firstEnumMember = enumDeclaration.members[0];
+                    if (!firstEnumMember.initializer) {
+                        if (seenEnumMissingInitialInitializer_1) {
+                            error(firstEnumMember.name, ts.Diagnostics.In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enum_element);
+                        }
+                        else {
+                            seenEnumMissingInitialInitializer_1 = true;
+                        }
+                    }
+                });
+            }
+        }
+        function getFirstNonAmbientClassOrFunctionDeclaration(symbol) {
+            var declarations = symbol.declarations;
+            for (var _i = 0, declarations_8 = declarations; _i < declarations_8.length; _i++) {
+                var declaration = declarations_8[_i];
+                if ((declaration.kind === 229 /* ClassDeclaration */ ||
+                    (declaration.kind === 228 /* FunctionDeclaration */ && ts.nodeIsPresent(declaration.body))) &&
+                    !ts.isInAmbientContext(declaration)) {
+                    return declaration;
+                }
+            }
+            return undefined;
+        }
+        function inSameLexicalScope(node1, node2) {
+            var container1 = ts.getEnclosingBlockScopeContainer(node1);
+            var container2 = ts.getEnclosingBlockScopeContainer(node2);
+            if (isGlobalSourceFile(container1)) {
+                return isGlobalSourceFile(container2);
+            }
+            else if (isGlobalSourceFile(container2)) {
+                return false;
             }
             else {
-                if (typePredicate.parameterIndex >= 0) {
-                    if (parent.parameters[typePredicate.parameterIndex].dotDotDotToken) {
-                        error(parameterName, ts.Diagnostics.A_type_predicate_cannot_reference_a_rest_parameter);
+                return container1 === container2;
+            }
+        }
+        function checkModuleDeclaration(node) {
+            if (produceDiagnostics) {
+                // Grammar checking
+                var isGlobalAugmentation = ts.isGlobalScopeAugmentation(node);
+                var inAmbientContext = ts.isInAmbientContext(node);
+                if (isGlobalAugmentation && !inAmbientContext) {
+                    error(node.name, ts.Diagnostics.Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambient_context);
+                }
+                var isAmbientExternalModule = ts.isAmbientModule(node);
+                var contextErrorMessage = isAmbientExternalModule
+                    ? ts.Diagnostics.An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file
+                    : ts.Diagnostics.A_namespace_declaration_is_only_allowed_in_a_namespace_or_module;
+                if (checkGrammarModuleElementContext(node, contextErrorMessage)) {
+                    // If we hit a module declaration in an illegal context, just bail out to avoid cascading errors.
+                    return;
+                }
+                if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node)) {
+                    if (!inAmbientContext && node.name.kind === 9 /* StringLiteral */) {
+                        grammarErrorOnNode(node.name, ts.Diagnostics.Only_ambient_modules_can_use_quoted_names);
                     }
-                    else {
-                        var leadingError = ts.chainDiagnosticMessages(undefined, ts.Diagnostics.A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type);
-                        checkTypeAssignableTo(typePredicate.type, getTypeOfNode(parent.parameters[typePredicate.parameterIndex]), node.type, 
-                        /*headMessage*/ undefined, leadingError);
+                }
+                if (ts.isIdentifier(node.name)) {
+                    checkCollisionWithCapturedThisVariable(node, node.name);
+                    checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
+                    checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
+                }
+                checkExportsOnMergedDeclarations(node);
+                var symbol = getSymbolOfNode(node);
+                // The following checks only apply on a non-ambient instantiated module declaration.
+                if (symbol.flags & 512 /* ValueModule */
+                    && symbol.declarations.length > 1
+                    && !inAmbientContext
+                    && isInstantiatedModule(node, compilerOptions.preserveConstEnums || compilerOptions.isolatedModules)) {
+                    var firstNonAmbientClassOrFunc = getFirstNonAmbientClassOrFunctionDeclaration(symbol);
+                    if (firstNonAmbientClassOrFunc) {
+                        if (ts.getSourceFileOfNode(node) !== ts.getSourceFileOfNode(firstNonAmbientClassOrFunc)) {
+                            error(node.name, ts.Diagnostics.A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merged);
+                        }
+                        else if (node.pos < firstNonAmbientClassOrFunc.pos) {
+                            error(node.name, ts.Diagnostics.A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged);
+                        }
+                    }
+                    // if the module merges with a class declaration in the same lexical scope,
+                    // we need to track this to ensure the correct emit.
+                    var mergedClass = ts.getDeclarationOfKind(symbol, 229 /* ClassDeclaration */);
+                    if (mergedClass &&
+                        inSameLexicalScope(node, mergedClass)) {
+                        getNodeLinks(node).flags |= 32768 /* LexicalModuleMergesWithClass */;
                     }
                 }
-                else if (parameterName) {
-                    var hasReportedError = false;
-                    for (var _i = 0, _a = parent.parameters; _i < _a.length; _i++) {
-                        var name_18 = _a[_i].name;
-                        if (ts.isBindingPattern(name_18) &&
-                            checkIfTypePredicateVariableIsDeclaredInBindingPattern(name_18, parameterName, typePredicate.parameterName)) {
-                            hasReportedError = true;
-                            break;
+                if (isAmbientExternalModule) {
+                    if (ts.isExternalModuleAugmentation(node)) {
+                        // body of the augmentation should be checked for consistency only if augmentation was applied to its target (either global scope or module)
+                        // otherwise we'll be swamped in cascading errors.
+                        // We can detect if augmentation was applied using following rules:
+                        // - augmentation for a global scope is always applied
+                        // - augmentation for some external module is applied if symbol for augmentation is merged (it was combined with target module).
+                        var checkBody = isGlobalAugmentation || (getSymbolOfNode(node).flags & 134217728 /* Transient */);
+                        if (checkBody && node.body) {
+                            // body of ambient external module is always a module block
+                            for (var _i = 0, _a = node.body.statements; _i < _a.length; _i++) {
+                                var statement = _a[_i];
+                                checkModuleAugmentationElement(statement, isGlobalAugmentation);
+                            }
                         }
                     }
-                    if (!hasReportedError) {
-                        error(node.parameterName, ts.Diagnostics.Cannot_find_parameter_0, typePredicate.parameterName);
+                    else if (isGlobalSourceFile(node.parent)) {
+                        if (isGlobalAugmentation) {
+                            error(node.name, ts.Diagnostics.Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations);
+                        }
+                        else if (ts.isExternalModuleNameRelative(node.name.text)) {
+                            error(node.name, ts.Diagnostics.Ambient_module_declaration_cannot_specify_relative_module_name);
+                        }
+                    }
+                    else {
+                        if (isGlobalAugmentation) {
+                            error(node.name, ts.Diagnostics.Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations);
+                        }
+                        else {
+                            // Node is not an augmentation and is not located on the script level.
+                            // This means that this is declaration of ambient module that is located in other module or namespace which is prohibited.
+                            error(node.name, ts.Diagnostics.Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces);
+                        }
                     }
                 }
             }
+            if (node.body) {
+                checkSourceElement(node.body);
+                if (!ts.isGlobalScopeAugmentation(node)) {
+                    registerForUnusedIdentifiersCheck(node);
+                }
+            }
         }
-        function getTypePredicateParent(node) {
-            switch (node.parent.kind) {
-                case 180 /* ArrowFunction */:
-                case 151 /* CallSignature */:
-                case 220 /* FunctionDeclaration */:
-                case 179 /* FunctionExpression */:
-                case 156 /* FunctionType */:
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                    var parent_12 = node.parent;
-                    if (node === parent_12.type) {
-                        return parent_12;
+        function checkModuleAugmentationElement(node, isGlobalAugmentation) {
+            switch (node.kind) {
+                case 208 /* VariableStatement */:
+                    // error each individual name in variable statement instead of marking the entire variable statement
+                    for (var _i = 0, _a = node.declarationList.declarations; _i < _a.length; _i++) {
+                        var decl = _a[_i];
+                        checkModuleAugmentationElement(decl, isGlobalAugmentation);
+                    }
+                    break;
+                case 243 /* ExportAssignment */:
+                case 244 /* ExportDeclaration */:
+                    grammarErrorOnFirstToken(node, ts.Diagnostics.Exports_and_export_assignments_are_not_permitted_in_module_augmentations);
+                    break;
+                case 237 /* ImportEqualsDeclaration */:
+                case 238 /* ImportDeclaration */:
+                    grammarErrorOnFirstToken(node, ts.Diagnostics.Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_module);
+                    break;
+                case 176 /* BindingElement */:
+                case 226 /* VariableDeclaration */:
+                    var name_32 = node.name;
+                    if (ts.isBindingPattern(name_32)) {
+                        for (var _b = 0, _c = name_32.elements; _b < _c.length; _b++) {
+                            var el = _c[_b];
+                            // mark individual names in binding pattern
+                            checkModuleAugmentationElement(el, isGlobalAugmentation);
+                        }
+                        break;
+                    }
+                // falls through
+                case 229 /* ClassDeclaration */:
+                case 232 /* EnumDeclaration */:
+                case 228 /* FunctionDeclaration */:
+                case 230 /* InterfaceDeclaration */:
+                case 233 /* ModuleDeclaration */:
+                case 231 /* TypeAliasDeclaration */:
+                    if (isGlobalAugmentation) {
+                        return;
+                    }
+                    var symbol = getSymbolOfNode(node);
+                    if (symbol) {
+                        // module augmentations cannot introduce new names on the top level scope of the module
+                        // this is done it two steps
+                        // 1. quick check - if symbol for node is not merged - this is local symbol to this augmentation - report error
+                        // 2. main check - report error if value declaration of the parent symbol is module augmentation)
+                        var reportError = !(symbol.flags & 134217728 /* Transient */);
+                        if (!reportError) {
+                            // symbol should not originate in augmentation
+                            reportError = ts.isExternalModuleAugmentation(symbol.parent.declarations[0]);
+                        }
                     }
+                    break;
+            }
+        }
+        function getFirstIdentifier(node) {
+            switch (node.kind) {
+                case 71 /* Identifier */:
+                    return node;
+                case 143 /* QualifiedName */:
+                    do {
+                        node = node.left;
+                    } while (node.kind !== 71 /* Identifier */);
+                    return node;
+                case 179 /* PropertyAccessExpression */:
+                    do {
+                        node = node.expression;
+                    } while (node.kind !== 71 /* Identifier */);
+                    return node;
+            }
+        }
+        function checkExternalImportOrExportDeclaration(node) {
+            var moduleName = ts.getExternalModuleName(node);
+            if (!ts.nodeIsMissing(moduleName) && moduleName.kind !== 9 /* StringLiteral */) {
+                error(moduleName, ts.Diagnostics.String_literal_expected);
+                return false;
+            }
+            var inAmbientExternalModule = node.parent.kind === 234 /* ModuleBlock */ && ts.isAmbientModule(node.parent.parent);
+            if (node.parent.kind !== 265 /* SourceFile */ && !inAmbientExternalModule) {
+                error(moduleName, node.kind === 244 /* ExportDeclaration */ ?
+                    ts.Diagnostics.Export_declarations_are_not_permitted_in_a_namespace :
+                    ts.Diagnostics.Import_declarations_in_a_namespace_cannot_reference_a_module);
+                return false;
+            }
+            if (inAmbientExternalModule && ts.isExternalModuleNameRelative(moduleName.text)) {
+                // we have already reported errors on top level imports\exports in external module augmentations in checkModuleDeclaration
+                // no need to do this again.
+                if (!isTopLevelInExternalModuleAugmentation(node)) {
+                    // TypeScript 1.0 spec (April 2013): 12.1.6
+                    // An ExternalImportDeclaration in an AmbientExternalModuleDeclaration may reference
+                    // other external modules only through top - level external module names.
+                    // Relative external module names are not permitted.
+                    error(node, ts.Diagnostics.Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relative_module_name);
+                    return false;
+                }
             }
+            return true;
         }
-        function checkIfTypePredicateVariableIsDeclaredInBindingPattern(pattern, predicateVariableNode, predicateVariableName) {
-            for (var _i = 0, _a = pattern.elements; _i < _a.length; _i++) {
-                var element = _a[_i];
-                if (ts.isOmittedExpression(element)) {
-                    continue;
-                }
-                var name_19 = element.name;
-                if (name_19.kind === 69 /* Identifier */ &&
-                    name_19.text === predicateVariableName) {
-                    error(predicateVariableNode, ts.Diagnostics.A_type_predicate_cannot_reference_element_0_in_a_binding_pattern, predicateVariableName);
-                    return true;
+        function checkAliasSymbol(node) {
+            var symbol = getSymbolOfNode(node);
+            var target = resolveAlias(symbol);
+            if (target !== unknownSymbol) {
+                // For external modules symbol represent local symbol for an alias.
+                // This local symbol will merge any other local declarations (excluding other aliases)
+                // and symbol.flags will contains combined representation for all merged declaration.
+                // Based on symbol.flags we can compute a set of excluded meanings (meaning that resolved alias should not have,
+                // otherwise it will conflict with some local declaration). Note that in addition to normal flags we include matching SymbolFlags.Export*
+                // in order to prevent collisions with declarations that were exported from the current module (they still contribute to local names).
+                var excludedMeanings = (symbol.flags & (107455 /* Value */ | 1048576 /* ExportValue */) ? 107455 /* Value */ : 0) |
+                    (symbol.flags & 793064 /* Type */ ? 793064 /* Type */ : 0) |
+                    (symbol.flags & 1920 /* Namespace */ ? 1920 /* Namespace */ : 0);
+                if (target.flags & excludedMeanings) {
+                    var message = node.kind === 246 /* ExportSpecifier */ ?
+                        ts.Diagnostics.Export_declaration_conflicts_with_exported_declaration_of_0 :
+                        ts.Diagnostics.Import_declaration_conflicts_with_local_declaration_of_0;
+                    error(node, message, symbolToString(symbol));
                 }
-                else if (name_19.kind === 168 /* ArrayBindingPattern */ ||
-                    name_19.kind === 167 /* ObjectBindingPattern */) {
-                    if (checkIfTypePredicateVariableIsDeclaredInBindingPattern(name_19, predicateVariableNode, predicateVariableName)) {
-                        return true;
-                    }
+                // Don't allow to re-export something with no value side when `--isolatedModules` is set.
+                if (compilerOptions.isolatedModules
+                    && node.kind === 246 /* ExportSpecifier */
+                    && !(target.flags & 107455 /* Value */)
+                    && !ts.isInAmbientContext(node)) {
+                    error(node, ts.Diagnostics.Cannot_re_export_a_type_when_the_isolatedModules_flag_is_provided);
                 }
             }
         }
-        function checkSignatureDeclaration(node) {
-            // Grammar checking
-            if (node.kind === 153 /* IndexSignature */) {
-                checkGrammarIndexSignature(node);
-            }
-            else if (node.kind === 156 /* FunctionType */ || node.kind === 220 /* FunctionDeclaration */ || node.kind === 157 /* ConstructorType */ ||
-                node.kind === 151 /* CallSignature */ || node.kind === 148 /* Constructor */ ||
-                node.kind === 152 /* ConstructSignature */) {
-                checkGrammarFunctionLikeDeclaration(node);
+        function checkImportBinding(node) {
+            checkCollisionWithCapturedThisVariable(node, node.name);
+            checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
+            checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
+            checkAliasSymbol(node);
+        }
+        function checkImportDeclaration(node) {
+            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_import_declaration_can_only_be_used_in_a_namespace_or_module)) {
+                // If we hit an import declaration in an illegal context, just bail out to avoid cascading errors.
+                return;
             }
-            checkTypeParameters(node.typeParameters);
-            ts.forEach(node.parameters, checkParameter);
-            if (node.type) {
-                checkSourceElement(node.type);
+            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && ts.getModifierFlags(node) !== 0) {
+                grammarErrorOnFirstToken(node, ts.Diagnostics.An_import_declaration_cannot_have_modifiers);
             }
-            if (produceDiagnostics) {
-                checkCollisionWithArgumentsInGeneratedCode(node);
-                if (compilerOptions.noImplicitAny && !node.type) {
-                    switch (node.kind) {
-                        case 152 /* ConstructSignature */:
-                            error(node, ts.Diagnostics.Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type);
-                            break;
-                        case 151 /* CallSignature */:
-                            error(node, ts.Diagnostics.Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type);
-                            break;
+            if (checkExternalImportOrExportDeclaration(node)) {
+                var importClause = node.importClause;
+                if (importClause) {
+                    if (importClause.name) {
+                        checkImportBinding(importClause);
                     }
-                }
-                if (node.type) {
-                    if (languageVersion >= 2 /* ES6 */ && isSyntacticallyValidGenerator(node)) {
-                        var returnType = getTypeFromTypeNode(node.type);
-                        if (returnType === voidType) {
-                            error(node.type, ts.Diagnostics.A_generator_cannot_have_a_void_type_annotation);
+                    if (importClause.namedBindings) {
+                        if (importClause.namedBindings.kind === 240 /* NamespaceImport */) {
+                            checkImportBinding(importClause.namedBindings);
                         }
                         else {
-                            var generatorElementType = getElementTypeOfIterableIterator(returnType) || anyType;
-                            var iterableIteratorInstantiation = createIterableIteratorType(generatorElementType);
-                            // Naively, one could check that IterableIterator<any> is assignable to the return type annotation.
-                            // However, that would not catch the error in the following case.
-                            //
-                            //    interface BadGenerator extends Iterable<number>, Iterator<string> { }
-                            //    function* g(): BadGenerator { } // Iterable and Iterator have different types!
-                            //
-                            checkTypeAssignableTo(iterableIteratorInstantiation, returnType, node.type);
+                            ts.forEach(importClause.namedBindings.elements, checkImportBinding);
                         }
                     }
-                    else if (ts.isAsyncFunctionLike(node)) {
-                        checkAsyncFunctionReturnType(node);
-                    }
-                }
-                if (noUnusedIdentifiers && !node.body) {
-                    checkUnusedTypeParameters(node);
                 }
             }
         }
-        function checkClassForDuplicateDeclarations(node) {
-            var Accessor;
-            (function (Accessor) {
-                Accessor[Accessor["Getter"] = 1] = "Getter";
-                Accessor[Accessor["Setter"] = 2] = "Setter";
-                Accessor[Accessor["Property"] = 3] = "Property";
-            })(Accessor || (Accessor = {}));
-            var instanceNames = ts.createMap();
-            var staticNames = ts.createMap();
-            for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
-                var member = _a[_i];
-                if (member.kind === 148 /* Constructor */) {
-                    for (var _b = 0, _c = member.parameters; _b < _c.length; _b++) {
-                        var param = _c[_b];
-                        if (ts.isParameterPropertyDeclaration(param)) {
-                            addName(instanceNames, param.name, param.name.text, 3 /* Property */);
+        function checkImportEqualsDeclaration(node) {
+            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_import_declaration_can_only_be_used_in_a_namespace_or_module)) {
+                // If we hit an import declaration in an illegal context, just bail out to avoid cascading errors.
+                return;
+            }
+            checkGrammarDecorators(node) || checkGrammarModifiers(node);
+            if (ts.isInternalModuleImportEqualsDeclaration(node) || checkExternalImportOrExportDeclaration(node)) {
+                checkImportBinding(node);
+                if (ts.getModifierFlags(node) & 1 /* Export */) {
+                    markExportAsReferenced(node);
+                }
+                if (ts.isInternalModuleImportEqualsDeclaration(node)) {
+                    var target = resolveAlias(getSymbolOfNode(node));
+                    if (target !== unknownSymbol) {
+                        if (target.flags & 107455 /* Value */) {
+                            // Target is a value symbol, check that it is not hidden by a local declaration with the same name
+                            var moduleName = getFirstIdentifier(node.moduleReference);
+                            if (!(resolveEntityName(moduleName, 107455 /* Value */ | 1920 /* Namespace */).flags & 1920 /* Namespace */)) {
+                                error(moduleName, ts.Diagnostics.Module_0_is_hidden_by_a_local_declaration_with_the_same_name, ts.declarationNameToString(moduleName));
+                            }
+                        }
+                        if (target.flags & 793064 /* Type */) {
+                            checkTypeNameIsReserved(node.name, ts.Diagnostics.Import_name_cannot_be_0);
                         }
                     }
                 }
                 else {
-                    var isStatic = ts.forEach(member.modifiers, function (m) { return m.kind === 113 /* StaticKeyword */; });
-                    var names = isStatic ? staticNames : instanceNames;
-                    var memberName = member.name && ts.getPropertyNameForPropertyNameNode(member.name);
-                    if (memberName) {
-                        switch (member.kind) {
-                            case 149 /* GetAccessor */:
-                                addName(names, member.name, memberName, 1 /* Getter */);
-                                break;
-                            case 150 /* SetAccessor */:
-                                addName(names, member.name, memberName, 2 /* Setter */);
-                                break;
-                            case 145 /* PropertyDeclaration */:
-                                addName(names, member.name, memberName, 3 /* Property */);
-                                break;
-                        }
+                    if (modulekind === ts.ModuleKind.ES2015 && !ts.isInAmbientContext(node)) {
+                        // Import equals declaration is deprecated in es6 or above
+                        grammarErrorOnNode(node, ts.Diagnostics.Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead);
                     }
                 }
             }
-            function addName(names, location, name, meaning) {
-                var prev = names[name];
-                if (prev) {
-                    if (prev & meaning) {
-                        error(location, ts.Diagnostics.Duplicate_identifier_0, ts.getTextOfNode(location));
-                    }
-                    else {
-                        names[name] = prev | meaning;
+        }
+        function checkExportDeclaration(node) {
+            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_export_declaration_can_only_be_used_in_a_module)) {
+                // If we hit an export in an illegal context, just bail out to avoid cascading errors.
+                return;
+            }
+            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && ts.getModifierFlags(node) !== 0) {
+                grammarErrorOnFirstToken(node, ts.Diagnostics.An_export_declaration_cannot_have_modifiers);
+            }
+            if (!node.moduleSpecifier || checkExternalImportOrExportDeclaration(node)) {
+                if (node.exportClause) {
+                    // export { x, y }
+                    // export { x, y } from "foo"
+                    ts.forEach(node.exportClause.elements, checkExportSpecifier);
+                    var inAmbientExternalModule = node.parent.kind === 234 /* ModuleBlock */ && ts.isAmbientModule(node.parent.parent);
+                    var inAmbientNamespaceDeclaration = !inAmbientExternalModule && node.parent.kind === 234 /* ModuleBlock */ &&
+                        !node.moduleSpecifier && ts.isInAmbientContext(node);
+                    if (node.parent.kind !== 265 /* SourceFile */ && !inAmbientExternalModule && !inAmbientNamespaceDeclaration) {
+                        error(node, ts.Diagnostics.Export_declarations_are_not_permitted_in_a_namespace);
                     }
                 }
                 else {
-                    names[name] = meaning;
-                }
-            }
-        }
-        function checkObjectTypeForDuplicateDeclarations(node) {
-            var names = ts.createMap();
-            for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
-                var member = _a[_i];
-                if (member.kind == 144 /* PropertySignature */) {
-                    var memberName = void 0;
-                    switch (member.name.kind) {
-                        case 9 /* StringLiteral */:
-                        case 8 /* NumericLiteral */:
-                        case 69 /* Identifier */:
-                            memberName = member.name.text;
-                            break;
-                        default:
-                            continue;
-                    }
-                    if (names[memberName]) {
-                        error(member.symbol.valueDeclaration.name, ts.Diagnostics.Duplicate_identifier_0, memberName);
-                        error(member.name, ts.Diagnostics.Duplicate_identifier_0, memberName);
+                    // export * from "foo"
+                    var moduleSymbol = resolveExternalModuleName(node, node.moduleSpecifier);
+                    if (moduleSymbol && hasExportAssignmentSymbol(moduleSymbol)) {
+                        error(node.moduleSpecifier, ts.Diagnostics.Module_0_uses_export_and_cannot_be_used_with_export_Asterisk, symbolToString(moduleSymbol));
                     }
-                    else {
-                        names[memberName] = true;
+                    if (modulekind !== ts.ModuleKind.System && modulekind !== ts.ModuleKind.ES2015) {
+                        checkExternalEmitHelpers(node, 32768 /* ExportStar */);
                     }
                 }
             }
         }
-        function checkTypeForDuplicateIndexSignatures(node) {
-            if (node.kind === 222 /* InterfaceDeclaration */) {
-                var nodeSymbol = getSymbolOfNode(node);
-                // in case of merging interface declaration it is possible that we'll enter this check procedure several times for every declaration
-                // to prevent this run check only for the first declaration of a given kind
-                if (nodeSymbol.declarations.length > 0 && nodeSymbol.declarations[0] !== node) {
-                    return;
-                }
-            }
-            // TypeScript 1.0 spec (April 2014)
-            // 3.7.4: An object type can contain at most one string index signature and one numeric index signature.
-            // 8.5: A class declaration can have at most one string index member declaration and one numeric index member declaration
-            var indexSymbol = getIndexSymbol(getSymbolOfNode(node));
-            if (indexSymbol) {
-                var seenNumericIndexer = false;
-                var seenStringIndexer = false;
-                for (var _i = 0, _a = indexSymbol.declarations; _i < _a.length; _i++) {
-                    var decl = _a[_i];
-                    var declaration = decl;
-                    if (declaration.parameters.length === 1 && declaration.parameters[0].type) {
-                        switch (declaration.parameters[0].type.kind) {
-                            case 132 /* StringKeyword */:
-                                if (!seenStringIndexer) {
-                                    seenStringIndexer = true;
-                                }
-                                else {
-                                    error(declaration, ts.Diagnostics.Duplicate_string_index_signature);
-                                }
-                                break;
-                            case 130 /* NumberKeyword */:
-                                if (!seenNumericIndexer) {
-                                    seenNumericIndexer = true;
-                                }
-                                else {
-                                    error(declaration, ts.Diagnostics.Duplicate_number_index_signature);
-                                }
-                                break;
-                        }
-                    }
-                }
+        function checkGrammarModuleElementContext(node, errorMessage) {
+            var isInAppropriateContext = node.parent.kind === 265 /* SourceFile */ || node.parent.kind === 234 /* ModuleBlock */ || node.parent.kind === 233 /* ModuleDeclaration */;
+            if (!isInAppropriateContext) {
+                grammarErrorOnFirstToken(node, errorMessage);
             }
+            return !isInAppropriateContext;
         }
-        function checkPropertyDeclaration(node) {
-            // Grammar checking
-            checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarProperty(node) || checkGrammarComputedPropertyName(node.name);
-            checkVariableLikeDeclaration(node);
-        }
-        function checkMethodDeclaration(node) {
-            // Grammar checking
-            checkGrammarMethod(node) || checkGrammarComputedPropertyName(node.name);
-            // Grammar checking for modifiers is done inside the function checkGrammarFunctionLikeDeclaration
-            checkFunctionOrMethodDeclaration(node);
-            // Abstract methods cannot have an implementation.
-            // Extra checks are to avoid reporting multiple errors relating to the "abstractness" of the node.
-            if (ts.getModifierFlags(node) & 128 /* Abstract */ && node.body) {
-                error(node, ts.Diagnostics.Method_0_cannot_have_an_implementation_because_it_is_marked_abstract, ts.declarationNameToString(node.name));
+        function checkExportSpecifier(node) {
+            checkAliasSymbol(node);
+            if (!node.parent.parent.moduleSpecifier) {
+                var exportedName = node.propertyName || node.name;
+                // find immediate value referenced by exported name (SymbolFlags.Alias is set so we don't chase down aliases)
+                var symbol = resolveName(exportedName, exportedName.text, 107455 /* Value */ | 793064 /* Type */ | 1920 /* Namespace */ | 8388608 /* Alias */, 
+                /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined);
+                if (symbol && (symbol === undefinedSymbol || isGlobalSourceFile(getDeclarationContainer(symbol.declarations[0])))) {
+                    error(exportedName, ts.Diagnostics.Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module, exportedName.text);
+                }
+                else {
+                    markExportAsReferenced(node);
+                }
             }
         }
-        function checkConstructorDeclaration(node) {
-            // Grammar check on signature of constructor and modifier of the constructor is done in checkSignatureDeclaration function.
-            checkSignatureDeclaration(node);
-            // Grammar check for checking only related to constructorDeclaration
-            checkGrammarConstructorTypeParameters(node) || checkGrammarConstructorTypeAnnotation(node);
-            checkSourceElement(node.body);
-            registerForUnusedIdentifiersCheck(node);
-            var symbol = getSymbolOfNode(node);
-            var firstDeclaration = ts.getDeclarationOfKind(symbol, node.kind);
-            // Only type check the symbol once
-            if (node === firstDeclaration) {
-                checkFunctionOrConstructorSymbol(symbol);
-            }
-            // exit early in the case of signature - super checks are not relevant to them
-            if (ts.nodeIsMissing(node.body)) {
+        function checkExportAssignment(node) {
+            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_export_assignment_can_only_be_used_in_a_module)) {
+                // If we hit an export assignment in an illegal context, just bail out to avoid cascading errors.
                 return;
             }
-            if (!produceDiagnostics) {
+            var container = node.parent.kind === 265 /* SourceFile */ ? node.parent : node.parent.parent;
+            if (container.kind === 233 /* ModuleDeclaration */ && !ts.isAmbientModule(container)) {
+                if (node.isExportEquals) {
+                    error(node, ts.Diagnostics.An_export_assignment_cannot_be_used_in_a_namespace);
+                }
+                else {
+                    error(node, ts.Diagnostics.A_default_export_can_only_be_used_in_an_ECMAScript_style_module);
+                }
                 return;
             }
-            function containsSuperCallAsComputedPropertyName(n) {
-                return n.name && containsSuperCall(n.name);
+            // Grammar checking
+            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && ts.getModifierFlags(node) !== 0) {
+                grammarErrorOnFirstToken(node, ts.Diagnostics.An_export_assignment_cannot_have_modifiers);
             }
-            function containsSuperCall(n) {
-                if (ts.isSuperCallExpression(n)) {
-                    return true;
-                }
-                else if (ts.isFunctionLike(n)) {
-                    return false;
-                }
-                else if (ts.isClassLike(n)) {
-                    return ts.forEach(n.members, containsSuperCallAsComputedPropertyName);
-                }
-                return ts.forEachChild(n, containsSuperCall);
+            if (node.expression.kind === 71 /* Identifier */) {
+                markExportAsReferenced(node);
             }
-            function markThisReferencesAsErrors(n) {
-                if (n.kind === 97 /* ThisKeyword */) {
-                    error(n, ts.Diagnostics.this_cannot_be_referenced_in_current_location);
+            else {
+                checkExpressionCached(node.expression);
+            }
+            checkExternalModuleExports(container);
+            if (node.isExportEquals && !ts.isInAmbientContext(node)) {
+                if (modulekind === ts.ModuleKind.ES2015) {
+                    // export assignment is not supported in es6 modules
+                    grammarErrorOnNode(node, ts.Diagnostics.Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_or_another_module_format_instead);
                 }
-                else if (n.kind !== 179 /* FunctionExpression */ && n.kind !== 220 /* FunctionDeclaration */) {
-                    ts.forEachChild(n, markThisReferencesAsErrors);
+                else if (modulekind === ts.ModuleKind.System) {
+                    // system modules does not support export assignment
+                    grammarErrorOnNode(node, ts.Diagnostics.Export_assignment_is_not_supported_when_module_flag_is_system);
                 }
             }
-            function isInstancePropertyWithInitializer(n) {
-                return n.kind === 145 /* PropertyDeclaration */ &&
-                    !(ts.getModifierFlags(n) & 32 /* Static */) &&
-                    !!n.initializer;
-            }
-            // TS 1.0 spec (April 2014): 8.3.2
-            // Constructors of classes with no extends clause may not contain super calls, whereas
-            // constructors of derived classes must contain at least one super call somewhere in their function body.
-            var containingClassDecl = node.parent;
-            if (ts.getClassExtendsHeritageClauseElement(containingClassDecl)) {
-                captureLexicalThis(node.parent, containingClassDecl);
-                var classExtendsNull = classDeclarationExtendsNull(containingClassDecl);
-                var superCall = getSuperCallInConstructor(node);
-                if (superCall) {
-                    if (classExtendsNull) {
-                        error(superCall, ts.Diagnostics.A_constructor_cannot_contain_a_super_call_when_its_class_extends_null);
+        }
+        function hasExportedMembers(moduleSymbol) {
+            return ts.forEachEntry(moduleSymbol.exports, function (_, id) { return id !== "export="; });
+        }
+        function checkExternalModuleExports(node) {
+            var moduleSymbol = getSymbolOfNode(node);
+            var links = getSymbolLinks(moduleSymbol);
+            if (!links.exportsChecked) {
+                var exportEqualsSymbol = moduleSymbol.exports.get("export=");
+                if (exportEqualsSymbol && hasExportedMembers(moduleSymbol)) {
+                    var declaration = getDeclarationOfAliasSymbol(exportEqualsSymbol) || exportEqualsSymbol.valueDeclaration;
+                    if (!isTopLevelInExternalModuleAugmentation(declaration)) {
+                        error(declaration, ts.Diagnostics.An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements);
                     }
-                    // The first statement in the body of a constructor (excluding prologue directives) must be a super call
-                    // if both of the following are true:
-                    // - The containing class is a derived class.
-                    // - The constructor declares parameter properties
-                    //   or the containing class declares instance member variables with initializers.
-                    var superCallShouldBeFirst = ts.forEach(node.parent.members, isInstancePropertyWithInitializer) ||
-                        ts.forEach(node.parameters, function (p) { return ts.getModifierFlags(p) & 92 /* ParameterPropertyModifier */; });
-                    // Skip past any prologue directives to find the first statement
-                    // to ensure that it was a super call.
-                    if (superCallShouldBeFirst) {
-                        var statements = node.body.statements;
-                        var superCallStatement = void 0;
-                        for (var _i = 0, statements_2 = statements; _i < statements_2.length; _i++) {
-                            var statement = statements_2[_i];
-                            if (statement.kind === 202 /* ExpressionStatement */ && ts.isSuperCallExpression(statement.expression)) {
-                                superCallStatement = statement;
-                                break;
-                            }
-                            if (!ts.isPrologueDirective(statement)) {
-                                break;
+                }
+                // Checks for export * conflicts
+                var exports = getExportsOfModule(moduleSymbol);
+                exports && exports.forEach(function (_a, id) {
+                    var declarations = _a.declarations, flags = _a.flags;
+                    if (id === "__export") {
+                        return;
+                    }
+                    // ECMA262: 15.2.1.1 It is a Syntax Error if the ExportedNames of ModuleItemList contains any duplicate entries.
+                    // (TS Exceptions: namespaces, function overloads, enums, and interfaces)
+                    if (flags & (1920 /* Namespace */ | 64 /* Interface */ | 384 /* Enum */)) {
+                        return;
+                    }
+                    var exportedDeclarationsCount = ts.countWhere(declarations, isNotOverload);
+                    if (flags & 524288 /* TypeAlias */ && exportedDeclarationsCount <= 2) {
+                        // it is legal to merge type alias with other values
+                        // so count should be either 1 (just type alias) or 2 (type alias + merged value)
+                        return;
+                    }
+                    if (exportedDeclarationsCount > 1) {
+                        for (var _i = 0, declarations_9 = declarations; _i < declarations_9.length; _i++) {
+                            var declaration = declarations_9[_i];
+                            if (isNotOverload(declaration)) {
+                                diagnostics.add(ts.createDiagnosticForNode(declaration, ts.Diagnostics.Cannot_redeclare_exported_variable_0, id));
                             }
                         }
-                        if (!superCallStatement) {
-                            error(node, ts.Diagnostics.A_super_call_must_be_the_first_statement_in_the_constructor_when_a_class_contains_initialized_properties_or_has_parameter_properties);
-                        }
                     }
+                });
+                links.exportsChecked = true;
+            }
+            function isNotOverload(declaration) {
+                return (declaration.kind !== 228 /* FunctionDeclaration */ && declaration.kind !== 151 /* MethodDeclaration */) ||
+                    !!declaration.body;
+            }
+        }
+        function checkSourceElement(node) {
+            if (!node) {
+                return;
+            }
+            var kind = node.kind;
+            if (cancellationToken) {
+                // Only bother checking on a few construct kinds.  We don't want to be excessively
+                // hitting the cancellation token on every node we check.
+                switch (kind) {
+                    case 233 /* ModuleDeclaration */:
+                    case 229 /* ClassDeclaration */:
+                    case 230 /* InterfaceDeclaration */:
+                    case 228 /* FunctionDeclaration */:
+                        cancellationToken.throwIfCancellationRequested();
                 }
-                else if (!classExtendsNull) {
-                    error(node, ts.Diagnostics.Constructors_for_derived_classes_must_contain_a_super_call);
+            }
+            switch (kind) {
+                case 145 /* TypeParameter */:
+                    return checkTypeParameter(node);
+                case 146 /* Parameter */:
+                    return checkParameter(node);
+                case 149 /* PropertyDeclaration */:
+                case 148 /* PropertySignature */:
+                    return checkPropertyDeclaration(node);
+                case 160 /* FunctionType */:
+                case 161 /* ConstructorType */:
+                case 155 /* CallSignature */:
+                case 156 /* ConstructSignature */:
+                    return checkSignatureDeclaration(node);
+                case 157 /* IndexSignature */:
+                    return checkSignatureDeclaration(node);
+                case 151 /* MethodDeclaration */:
+                case 150 /* MethodSignature */:
+                    return checkMethodDeclaration(node);
+                case 152 /* Constructor */:
+                    return checkConstructorDeclaration(node);
+                case 153 /* GetAccessor */:
+                case 154 /* SetAccessor */:
+                    return checkAccessorDeclaration(node);
+                case 159 /* TypeReference */:
+                    return checkTypeReferenceNode(node);
+                case 158 /* TypePredicate */:
+                    return checkTypePredicate(node);
+                case 162 /* TypeQuery */:
+                    return checkTypeQuery(node);
+                case 163 /* TypeLiteral */:
+                    return checkTypeLiteral(node);
+                case 164 /* ArrayType */:
+                    return checkArrayType(node);
+                case 165 /* TupleType */:
+                    return checkTupleType(node);
+                case 166 /* UnionType */:
+                case 167 /* IntersectionType */:
+                    return checkUnionOrIntersectionType(node);
+                case 168 /* ParenthesizedType */:
+                case 170 /* TypeOperator */:
+                    return checkSourceElement(node.type);
+                case 171 /* IndexedAccessType */:
+                    return checkIndexedAccessType(node);
+                case 172 /* MappedType */:
+                    return checkMappedType(node);
+                case 228 /* FunctionDeclaration */:
+                    return checkFunctionDeclaration(node);
+                case 207 /* Block */:
+                case 234 /* ModuleBlock */:
+                    return checkBlock(node);
+                case 208 /* VariableStatement */:
+                    return checkVariableStatement(node);
+                case 210 /* ExpressionStatement */:
+                    return checkExpressionStatement(node);
+                case 211 /* IfStatement */:
+                    return checkIfStatement(node);
+                case 212 /* DoStatement */:
+                    return checkDoStatement(node);
+                case 213 /* WhileStatement */:
+                    return checkWhileStatement(node);
+                case 214 /* ForStatement */:
+                    return checkForStatement(node);
+                case 215 /* ForInStatement */:
+                    return checkForInStatement(node);
+                case 216 /* ForOfStatement */:
+                    return checkForOfStatement(node);
+                case 217 /* ContinueStatement */:
+                case 218 /* BreakStatement */:
+                    return checkBreakOrContinueStatement(node);
+                case 219 /* ReturnStatement */:
+                    return checkReturnStatement(node);
+                case 220 /* WithStatement */:
+                    return checkWithStatement(node);
+                case 221 /* SwitchStatement */:
+                    return checkSwitchStatement(node);
+                case 222 /* LabeledStatement */:
+                    return checkLabeledStatement(node);
+                case 223 /* ThrowStatement */:
+                    return checkThrowStatement(node);
+                case 224 /* TryStatement */:
+                    return checkTryStatement(node);
+                case 226 /* VariableDeclaration */:
+                    return checkVariableDeclaration(node);
+                case 176 /* BindingElement */:
+                    return checkBindingElement(node);
+                case 229 /* ClassDeclaration */:
+                    return checkClassDeclaration(node);
+                case 230 /* InterfaceDeclaration */:
+                    return checkInterfaceDeclaration(node);
+                case 231 /* TypeAliasDeclaration */:
+                    return checkTypeAliasDeclaration(node);
+                case 232 /* EnumDeclaration */:
+                    return checkEnumDeclaration(node);
+                case 233 /* ModuleDeclaration */:
+                    return checkModuleDeclaration(node);
+                case 238 /* ImportDeclaration */:
+                    return checkImportDeclaration(node);
+                case 237 /* ImportEqualsDeclaration */:
+                    return checkImportEqualsDeclaration(node);
+                case 244 /* ExportDeclaration */:
+                    return checkExportDeclaration(node);
+                case 243 /* ExportAssignment */:
+                    return checkExportAssignment(node);
+                case 209 /* EmptyStatement */:
+                    checkGrammarStatementInAmbientContext(node);
+                    return;
+                case 225 /* DebuggerStatement */:
+                    checkGrammarStatementInAmbientContext(node);
+                    return;
+                case 247 /* MissingDeclaration */:
+                    return checkMissingDeclaration(node);
+            }
+        }
+        // Function and class expression bodies are checked after all statements in the enclosing body. This is
+        // to ensure constructs like the following are permitted:
+        //     const foo = function () {
+        //        const s = foo();
+        //        return "hello";
+        //     }
+        // Here, performing a full type check of the body of the function expression whilst in the process of
+        // determining the type of foo would cause foo to be given type any because of the recursive reference.
+        // Delaying the type check of the body ensures foo has been assigned a type.
+        function checkNodeDeferred(node) {
+            if (deferredNodes) {
+                deferredNodes.push(node);
+            }
+        }
+        function checkDeferredNodes() {
+            for (var _i = 0, deferredNodes_1 = deferredNodes; _i < deferredNodes_1.length; _i++) {
+                var node = deferredNodes_1[_i];
+                switch (node.kind) {
+                    case 186 /* FunctionExpression */:
+                    case 187 /* ArrowFunction */:
+                    case 151 /* MethodDeclaration */:
+                    case 150 /* MethodSignature */:
+                        checkFunctionExpressionOrObjectLiteralMethodDeferred(node);
+                        break;
+                    case 153 /* GetAccessor */:
+                    case 154 /* SetAccessor */:
+                        checkAccessorDeclaration(node);
+                        break;
+                    case 199 /* ClassExpression */:
+                        checkClassExpressionDeferred(node);
+                        break;
                 }
             }
         }
-        function checkAccessorDeclaration(node) {
-            if (produceDiagnostics) {
-                // Grammar checking accessors
-                checkGrammarFunctionLikeDeclaration(node) || checkGrammarAccessor(node) || checkGrammarComputedPropertyName(node.name);
-                checkDecorators(node);
-                checkSignatureDeclaration(node);
-                if (node.kind === 149 /* GetAccessor */) {
-                    if (!ts.isInAmbientContext(node) && ts.nodeIsPresent(node.body) && (node.flags & 128 /* HasImplicitReturn */)) {
-                        if (!(node.flags & 256 /* HasExplicitReturn */)) {
-                            error(node.name, ts.Diagnostics.A_get_accessor_must_return_a_value);
-                        }
-                    }
+        function checkSourceFile(node) {
+            ts.performance.mark("beforeCheck");
+            checkSourceFileWorker(node);
+            ts.performance.mark("afterCheck");
+            ts.performance.measure("Check", "beforeCheck", "afterCheck");
+        }
+        // Fully type check a source file and collect the relevant diagnostics.
+        function checkSourceFileWorker(node) {
+            var links = getNodeLinks(node);
+            if (!(links.flags & 1 /* TypeChecked */)) {
+                // If skipLibCheck is enabled, skip type checking if file is a declaration file.
+                // If skipDefaultLibCheck is enabled, skip type checking if file contains a
+                // '/// <reference no-default-lib="true"/>' directive.
+                if (compilerOptions.skipLibCheck && node.isDeclarationFile || compilerOptions.skipDefaultLibCheck && node.hasNoDefaultLib) {
+                    return;
                 }
-                // Do not use hasDynamicName here, because that returns false for well known symbols.
-                // We want to perform checkComputedPropertyName for all computed properties, including
-                // well known symbols.
-                if (node.name.kind === 140 /* ComputedPropertyName */) {
-                    checkComputedPropertyName(node.name);
+                // Grammar checking
+                checkGrammarSourceFile(node);
+                potentialThisCollisions.length = 0;
+                potentialNewTargetCollisions.length = 0;
+                deferredNodes = [];
+                deferredUnusedIdentifierNodes = produceDiagnostics && noUnusedIdentifiers ? [] : undefined;
+                ts.forEach(node.statements, checkSourceElement);
+                checkDeferredNodes();
+                if (ts.isExternalModule(node)) {
+                    registerForUnusedIdentifiersCheck(node);
                 }
-                if (!ts.hasDynamicName(node)) {
-                    // TypeScript 1.0 spec (April 2014): 8.4.3
-                    // Accessors for the same member name must specify the same accessibility.
-                    var otherKind = node.kind === 149 /* GetAccessor */ ? 150 /* SetAccessor */ : 149 /* GetAccessor */;
-                    var otherAccessor = ts.getDeclarationOfKind(node.symbol, otherKind);
-                    if (otherAccessor) {
-                        if ((ts.getModifierFlags(node) & 28 /* AccessibilityModifier */) !== (ts.getModifierFlags(otherAccessor) & 28 /* AccessibilityModifier */)) {
-                            error(node.name, ts.Diagnostics.Getter_and_setter_accessors_do_not_agree_in_visibility);
-                        }
-                        if (ts.hasModifier(node, 128 /* Abstract */) !== ts.hasModifier(otherAccessor, 128 /* Abstract */)) {
-                            error(node.name, ts.Diagnostics.Accessors_must_both_be_abstract_or_non_abstract);
-                        }
-                        // TypeScript 1.0 spec (April 2014): 4.5
-                        // If both accessors include type annotations, the specified types must be identical.
-                        checkAccessorDeclarationTypesIdentical(node, otherAccessor, getAnnotatedAccessorType, ts.Diagnostics.get_and_set_accessor_must_have_the_same_type);
-                        checkAccessorDeclarationTypesIdentical(node, otherAccessor, getThisTypeOfDeclaration, ts.Diagnostics.get_and_set_accessor_must_have_the_same_this_type);
-                    }
+                if (!node.isDeclarationFile) {
+                    checkUnusedIdentifiers();
+                }
+                deferredNodes = undefined;
+                deferredUnusedIdentifierNodes = undefined;
+                if (ts.isExternalOrCommonJsModule(node)) {
+                    checkExternalModuleExports(node);
+                }
+                if (potentialThisCollisions.length) {
+                    ts.forEach(potentialThisCollisions, checkIfThisIsCapturedInEnclosingScope);
+                    potentialThisCollisions.length = 0;
                 }
-                var returnType = getTypeOfAccessors(getSymbolOfNode(node));
-                if (node.kind === 149 /* GetAccessor */) {
-                    checkAllCodePathsInNonVoidFunctionReturnOrThrow(node, returnType);
+                if (potentialNewTargetCollisions.length) {
+                    ts.forEach(potentialNewTargetCollisions, checkIfNewTargetIsCapturedInEnclosingScope);
+                    potentialNewTargetCollisions.length = 0;
                 }
+                links.flags |= 1 /* TypeChecked */;
             }
-            if (node.parent.kind !== 171 /* ObjectLiteralExpression */) {
-                checkSourceElement(node.body);
-                registerForUnusedIdentifiersCheck(node);
+        }
+        function getDiagnostics(sourceFile, ct) {
+            try {
+                // Record the cancellation token so it can be checked later on during checkSourceElement.
+                // Do this in a finally block so we can ensure that it gets reset back to nothing after
+                // this call is done.
+                cancellationToken = ct;
+                return getDiagnosticsWorker(sourceFile);
             }
-            else {
-                checkNodeDeferred(node);
+            finally {
+                cancellationToken = undefined;
             }
         }
-        function checkAccessorDeclarationTypesIdentical(first, second, getAnnotatedType, message) {
-            var firstType = getAnnotatedType(first);
-            var secondType = getAnnotatedType(second);
-            if (firstType && secondType && !isTypeIdenticalTo(firstType, secondType)) {
-                error(first, message);
+        function getDiagnosticsWorker(sourceFile) {
+            throwIfNonDiagnosticsProducing();
+            if (sourceFile) {
+                // Some global diagnostics are deferred until they are needed and
+                // may not be reported in the firt call to getGlobalDiagnostics.
+                // We should catch these changes and report them.
+                var previousGlobalDiagnostics = diagnostics.getGlobalDiagnostics();
+                var previousGlobalDiagnosticsSize = previousGlobalDiagnostics.length;
+                checkSourceFile(sourceFile);
+                var semanticDiagnostics = diagnostics.getDiagnostics(sourceFile.fileName);
+                var currentGlobalDiagnostics = diagnostics.getGlobalDiagnostics();
+                if (currentGlobalDiagnostics !== previousGlobalDiagnostics) {
+                    // If the arrays are not the same reference, new diagnostics were added.
+                    var deferredGlobalDiagnostics = ts.relativeComplement(previousGlobalDiagnostics, currentGlobalDiagnostics, ts.compareDiagnostics);
+                    return ts.concatenate(deferredGlobalDiagnostics, semanticDiagnostics);
+                }
+                else if (previousGlobalDiagnosticsSize === 0 && currentGlobalDiagnostics.length > 0) {
+                    // If the arrays are the same reference, but the length has changed, a single
+                    // new diagnostic was added as DiagnosticCollection attempts to reuse the
+                    // same array.
+                    return ts.concatenate(currentGlobalDiagnostics, semanticDiagnostics);
+                }
+                return semanticDiagnostics;
             }
+            // Global diagnostics are always added when a file is not provided to
+            // getDiagnostics
+            ts.forEach(host.getSourceFiles(), checkSourceFile);
+            return diagnostics.getDiagnostics();
         }
-        function checkAccessorDeferred(node) {
-            checkSourceElement(node.body);
-            registerForUnusedIdentifiersCheck(node);
+        function getGlobalDiagnostics() {
+            throwIfNonDiagnosticsProducing();
+            return diagnostics.getGlobalDiagnostics();
         }
-        function checkMissingDeclaration(node) {
-            checkDecorators(node);
+        function throwIfNonDiagnosticsProducing() {
+            if (!produceDiagnostics) {
+                throw new Error("Trying to get diagnostics from a type checker that does not produce them.");
+            }
         }
-        function checkTypeArgumentConstraints(typeParameters, typeArgumentNodes) {
-            var typeArguments;
-            var mapper;
-            var result = true;
-            for (var i = 0; i < typeParameters.length; i++) {
-                var constraint = getConstraintOfTypeParameter(typeParameters[i]);
-                if (constraint) {
-                    if (!typeArguments) {
-                        typeArguments = ts.map(typeArgumentNodes, getTypeFromTypeNodeNoAlias);
-                        mapper = createTypeMapper(typeParameters, typeArguments);
+        // Language service support
+        function isInsideWithStatementBody(node) {
+            if (node) {
+                while (node.parent) {
+                    if (node.parent.kind === 220 /* WithStatement */ && node.parent.statement === node) {
+                        return true;
                     }
-                    var typeArgument = typeArguments[i];
-                    result = result && checkTypeAssignableTo(typeArgument, getTypeWithThisArgument(instantiateType(constraint, mapper), typeArgument), typeArgumentNodes[i], ts.Diagnostics.Type_0_does_not_satisfy_the_constraint_1);
+                    node = node.parent;
                 }
             }
-            return result;
+            return false;
         }
-        function checkTypeReferenceNode(node) {
-            checkGrammarTypeArguments(node, node.typeArguments);
-            var type = getTypeFromTypeReference(node);
-            if (type !== unknownType) {
-                if (node.typeArguments) {
-                    // Do type argument local checks only if referenced type is successfully resolved
-                    ts.forEach(node.typeArguments, checkSourceElement);
-                    if (produceDiagnostics) {
-                        var symbol = getNodeLinks(node).resolvedSymbol;
-                        var typeParameters = symbol.flags & 524288 /* TypeAlias */ ? getSymbolLinks(symbol).typeParameters : type.target.localTypeParameters;
-                        checkTypeArgumentConstraints(typeParameters, node.typeArguments);
+        function getSymbolsInScope(location, meaning) {
+            if (isInsideWithStatementBody(location)) {
+                // We cannot answer semantic questions within a with block, do not proceed any further
+                return [];
+            }
+            var symbols = ts.createMap();
+            var memberFlags = 0 /* None */;
+            populateSymbols();
+            return symbolsToArray(symbols);
+            function populateSymbols() {
+                while (location) {
+                    if (location.locals && !isGlobalSourceFile(location)) {
+                        copySymbols(location.locals, meaning);
+                    }
+                    switch (location.kind) {
+                        case 265 /* SourceFile */:
+                            if (!ts.isExternalOrCommonJsModule(location)) {
+                                break;
+                            }
+                        // falls through
+                        case 233 /* ModuleDeclaration */:
+                            copySymbols(getSymbolOfNode(location).exports, meaning & 8914931 /* ModuleMember */);
+                            break;
+                        case 232 /* EnumDeclaration */:
+                            copySymbols(getSymbolOfNode(location).exports, meaning & 8 /* EnumMember */);
+                            break;
+                        case 199 /* ClassExpression */:
+                            var className = location.name;
+                            if (className) {
+                                copySymbol(location.symbol, meaning);
+                            }
+                        // falls through
+                        // this fall-through is necessary because we would like to handle
+                        // type parameter inside class expression similar to how we handle it in classDeclaration and interface Declaration
+                        case 229 /* ClassDeclaration */:
+                        case 230 /* InterfaceDeclaration */:
+                            // If we didn't come from static member of class or interface,
+                            // add the type parameters into the symbol table
+                            // (type parameters of classDeclaration/classExpression and interface are in member property of the symbol.
+                            // Note: that the memberFlags come from previous iteration.
+                            if (!(memberFlags & 32 /* Static */)) {
+                                copySymbols(getSymbolOfNode(location).members, meaning & 793064 /* Type */);
+                            }
+                            break;
+                        case 186 /* FunctionExpression */:
+                            var funcName = location.name;
+                            if (funcName) {
+                                copySymbol(location.symbol, meaning);
+                            }
+                            break;
                     }
+                    if (ts.introducesArgumentsExoticObject(location)) {
+                        copySymbol(argumentsSymbol, meaning);
+                    }
+                    memberFlags = ts.getModifierFlags(location);
+                    location = location.parent;
                 }
-                if (type.flags & 16 /* Enum */ && !type.memberTypes && getNodeLinks(node).resolvedSymbol.flags & 8 /* EnumMember */) {
-                    error(node, ts.Diagnostics.Enum_type_0_has_members_with_initializers_that_are_not_literals, typeToString(type));
+                copySymbols(globals, meaning);
+            }
+            /**
+             * Copy the given symbol into symbol tables if the symbol has the given meaning
+             * and it doesn't already existed in the symbol table
+             * @param key a key for storing in symbol table; if undefined, use symbol.name
+             * @param symbol the symbol to be added into symbol table
+             * @param meaning meaning of symbol to filter by before adding to symbol table
+             */
+            function copySymbol(symbol, meaning) {
+                if (symbol.flags & meaning) {
+                    var id = symbol.name;
+                    // We will copy all symbol regardless of its reserved name because
+                    // symbolsToArray will check whether the key is a reserved name and
+                    // it will not copy symbol with reserved name to the array
+                    if (!symbols.has(id)) {
+                        symbols.set(id, symbol);
+                    }
+                }
+            }
+            function copySymbols(source, meaning) {
+                if (meaning) {
+                    source.forEach(function (symbol) {
+                        copySymbol(symbol, meaning);
+                    });
                 }
             }
         }
-        function checkTypeQuery(node) {
-            getTypeFromTypeQueryNode(node);
+        function isTypeDeclarationName(name) {
+            return name.kind === 71 /* Identifier */ &&
+                isTypeDeclaration(name.parent) &&
+                name.parent.name === name;
         }
-        function checkTypeLiteral(node) {
-            ts.forEach(node.members, checkSourceElement);
-            if (produceDiagnostics) {
-                var type = getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node);
-                checkIndexConstraints(type);
-                checkTypeForDuplicateIndexSignatures(node);
-                checkObjectTypeForDuplicateDeclarations(node);
+        function isTypeDeclaration(node) {
+            switch (node.kind) {
+                case 145 /* TypeParameter */:
+                case 229 /* ClassDeclaration */:
+                case 230 /* InterfaceDeclaration */:
+                case 231 /* TypeAliasDeclaration */:
+                case 232 /* EnumDeclaration */:
+                    return true;
             }
         }
-        function checkArrayType(node) {
-            checkSourceElement(node.elementType);
+        // True if the given identifier is part of a type reference
+        function isTypeReferenceIdentifier(entityName) {
+            var node = entityName;
+            while (node.parent && node.parent.kind === 143 /* QualifiedName */) {
+                node = node.parent;
+            }
+            return node.parent && (node.parent.kind === 159 /* TypeReference */ || node.parent.kind === 277 /* JSDocTypeReference */);
         }
-        function checkTupleType(node) {
-            // Grammar checking
-            var hasErrorFromDisallowedTrailingComma = checkGrammarForDisallowedTrailingComma(node.elementTypes);
-            if (!hasErrorFromDisallowedTrailingComma && node.elementTypes.length === 0) {
-                grammarErrorOnNode(node, ts.Diagnostics.A_tuple_type_element_list_cannot_be_empty);
+        function isHeritageClauseElementIdentifier(entityName) {
+            var node = entityName;
+            while (node.parent && node.parent.kind === 179 /* PropertyAccessExpression */) {
+                node = node.parent;
             }
-            ts.forEach(node.elementTypes, checkSourceElement);
+            return node.parent && node.parent.kind === 201 /* ExpressionWithTypeArguments */;
         }
-        function checkUnionOrIntersectionType(node) {
-            ts.forEach(node.types, checkSourceElement);
+        function forEachEnclosingClass(node, callback) {
+            var result;
+            while (true) {
+                node = ts.getContainingClass(node);
+                if (!node)
+                    break;
+                if (result = callback(node))
+                    break;
+            }
+            return result;
         }
-        function isPrivateWithinAmbient(node) {
-            return (ts.getModifierFlags(node) & 8 /* Private */) && ts.isInAmbientContext(node);
+        function isNodeWithinClass(node, classDeclaration) {
+            return !!forEachEnclosingClass(node, function (n) { return n === classDeclaration; });
         }
-        function getEffectiveDeclarationFlags(n, flagsToCheck) {
-            var flags = ts.getCombinedModifierFlags(n);
-            // children of classes (even ambient classes) should not be marked as ambient or export
-            // because those flags have no useful semantics there.
-            if (n.parent.kind !== 222 /* InterfaceDeclaration */ &&
-                n.parent.kind !== 221 /* ClassDeclaration */ &&
-                n.parent.kind !== 192 /* ClassExpression */ &&
-                ts.isInAmbientContext(n)) {
-                if (!(flags & 2 /* Ambient */)) {
-                    // It is nested in an ambient context, which means it is automatically exported
-                    flags |= 1 /* Export */;
-                }
-                flags |= 2 /* Ambient */;
+        function getLeftSideOfImportEqualsOrExportAssignment(nodeOnRightSide) {
+            while (nodeOnRightSide.parent.kind === 143 /* QualifiedName */) {
+                nodeOnRightSide = nodeOnRightSide.parent;
             }
-            return flags & flagsToCheck;
+            if (nodeOnRightSide.parent.kind === 237 /* ImportEqualsDeclaration */) {
+                return nodeOnRightSide.parent.moduleReference === nodeOnRightSide && nodeOnRightSide.parent;
+            }
+            if (nodeOnRightSide.parent.kind === 243 /* ExportAssignment */) {
+                return nodeOnRightSide.parent.expression === nodeOnRightSide && nodeOnRightSide.parent;
+            }
+            return undefined;
         }
-        function checkFunctionOrConstructorSymbol(symbol) {
-            if (!produceDiagnostics) {
-                return;
+        function isInRightSideOfImportOrExportAssignment(node) {
+            return getLeftSideOfImportEqualsOrExportAssignment(node) !== undefined;
+        }
+        function getSpecialPropertyAssignmentSymbolFromEntityName(entityName) {
+            var specialPropertyAssignmentKind = ts.getSpecialPropertyAssignmentKind(entityName.parent.parent);
+            switch (specialPropertyAssignmentKind) {
+                case 1 /* ExportsProperty */:
+                case 3 /* PrototypeProperty */:
+                    return getSymbolOfNode(entityName.parent);
+                case 4 /* ThisProperty */:
+                case 2 /* ModuleExports */:
+                case 5 /* Property */:
+                    return getSymbolOfNode(entityName.parent.parent);
             }
-            function getCanonicalOverload(overloads, implementation) {
-                // Consider the canonical set of flags to be the flags of the bodyDeclaration or the first declaration
-                // Error on all deviations from this canonical set of flags
-                // The caveat is that if some overloads are defined in lib.d.ts, we don't want to
-                // report the errors on those. To achieve this, we will say that the implementation is
-                // the canonical signature only if it is in the same container as the first overload
-                var implementationSharesContainerWithFirstOverload = implementation !== undefined && implementation.parent === overloads[0].parent;
-                return implementationSharesContainerWithFirstOverload ? implementation : overloads[0];
+        }
+        function getSymbolOfEntityNameOrPropertyAccessExpression(entityName) {
+            if (ts.isDeclarationName(entityName)) {
+                return getSymbolOfNode(entityName.parent);
             }
-            function checkFlagAgreementBetweenOverloads(overloads, implementation, flagsToCheck, someOverloadFlags, allOverloadFlags) {
-                // Error if some overloads have a flag that is not shared by all overloads. To find the
-                // deviations, we XOR someOverloadFlags with allOverloadFlags
-                var someButNotAllOverloadFlags = someOverloadFlags ^ allOverloadFlags;
-                if (someButNotAllOverloadFlags !== 0) {
-                    var canonicalFlags_1 = getEffectiveDeclarationFlags(getCanonicalOverload(overloads, implementation), flagsToCheck);
-                    ts.forEach(overloads, function (o) {
-                        var deviation = getEffectiveDeclarationFlags(o, flagsToCheck) ^ canonicalFlags_1;
-                        if (deviation & 1 /* Export */) {
-                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_exported_or_non_exported);
-                        }
-                        else if (deviation & 2 /* Ambient */) {
-                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_ambient_or_non_ambient);
-                        }
-                        else if (deviation & (8 /* Private */ | 16 /* Protected */)) {
-                            error(o.name || o, ts.Diagnostics.Overload_signatures_must_all_be_public_private_or_protected);
-                        }
-                        else if (deviation & 128 /* Abstract */) {
-                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_abstract_or_non_abstract);
-                        }
-                    });
+            if (ts.isInJavaScriptFile(entityName) &&
+                entityName.parent.kind === 179 /* PropertyAccessExpression */ &&
+                entityName.parent === entityName.parent.parent.left) {
+                // Check if this is a special property assignment
+                var specialPropertyAssignmentSymbol = getSpecialPropertyAssignmentSymbolFromEntityName(entityName);
+                if (specialPropertyAssignmentSymbol) {
+                    return specialPropertyAssignmentSymbol;
                 }
             }
-            function checkQuestionTokenAgreementBetweenOverloads(overloads, implementation, someHaveQuestionToken, allHaveQuestionToken) {
-                if (someHaveQuestionToken !== allHaveQuestionToken) {
-                    var canonicalHasQuestionToken_1 = ts.hasQuestionToken(getCanonicalOverload(overloads, implementation));
-                    ts.forEach(overloads, function (o) {
-                        var deviation = ts.hasQuestionToken(o) !== canonicalHasQuestionToken_1;
-                        if (deviation) {
-                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_optional_or_required);
-                        }
-                    });
-                }
+            if (entityName.parent.kind === 243 /* ExportAssignment */ && ts.isEntityNameExpression(entityName)) {
+                return resolveEntityName(entityName, 
+                /*all meanings*/ 107455 /* Value */ | 793064 /* Type */ | 1920 /* Namespace */ | 8388608 /* Alias */);
             }
-            var flagsToCheck = 1 /* Export */ | 2 /* Ambient */ | 8 /* Private */ | 16 /* Protected */ | 128 /* Abstract */;
-            var someNodeFlags = 0 /* None */;
-            var allNodeFlags = flagsToCheck;
-            var someHaveQuestionToken = false;
-            var allHaveQuestionToken = true;
-            var hasOverloads = false;
-            var bodyDeclaration;
-            var lastSeenNonAmbientDeclaration;
-            var previousDeclaration;
-            var declarations = symbol.declarations;
-            var isConstructor = (symbol.flags & 16384 /* Constructor */) !== 0;
-            function reportImplementationExpectedError(node) {
-                if (node.name && ts.nodeIsMissing(node.name)) {
-                    return;
-                }
-                var seen = false;
-                var subsequentNode = ts.forEachChild(node.parent, function (c) {
-                    if (seen) {
-                        return c;
-                    }
-                    else {
-                        seen = c === node;
-                    }
-                });
-                // We may be here because of some extra nodes between overloads that could not be parsed into a valid node.
-                // In this case the subsequent node is not really consecutive (.pos !== node.end), and we must ignore it here.
-                if (subsequentNode && subsequentNode.pos === node.end) {
-                    if (subsequentNode.kind === node.kind) {
-                        var errorNode_1 = subsequentNode.name || subsequentNode;
-                        // TODO(jfreeman): These are methods, so handle computed name case
-                        if (node.name && subsequentNode.name && node.name.text === subsequentNode.name.text) {
-                            var reportError = (node.kind === 147 /* MethodDeclaration */ || node.kind === 146 /* MethodSignature */) &&
-                                (ts.getModifierFlags(node) & 32 /* Static */) !== (ts.getModifierFlags(subsequentNode) & 32 /* Static */);
-                            // we can get here in two cases
-                            // 1. mixed static and instance class members
-                            // 2. something with the same name was defined before the set of overloads that prevents them from merging
-                            // here we'll report error only for the first case since for second we should already report error in binder
-                            if (reportError) {
-                                var diagnostic = ts.getModifierFlags(node) & 32 /* Static */ ? ts.Diagnostics.Function_overload_must_be_static : ts.Diagnostics.Function_overload_must_not_be_static;
-                                error(errorNode_1, diagnostic);
-                            }
-                            return;
-                        }
-                        else if (ts.nodeIsPresent(subsequentNode.body)) {
-                            error(errorNode_1, ts.Diagnostics.Function_implementation_name_must_be_0, ts.declarationNameToString(node.name));
-                            return;
-                        }
+            if (entityName.kind !== 179 /* PropertyAccessExpression */ && isInRightSideOfImportOrExportAssignment(entityName)) {
+                // Since we already checked for ExportAssignment, this really could only be an Import
+                var importEqualsDeclaration = ts.getAncestor(entityName, 237 /* ImportEqualsDeclaration */);
+                ts.Debug.assert(importEqualsDeclaration !== undefined);
+                return getSymbolOfPartOfRightHandSideOfImportEquals(entityName, /*dontResolveAlias*/ true);
+            }
+            if (ts.isRightSideOfQualifiedNameOrPropertyAccess(entityName)) {
+                entityName = entityName.parent;
+            }
+            if (isHeritageClauseElementIdentifier(entityName)) {
+                var meaning = 0 /* None */;
+                // In an interface or class, we're definitely interested in a type.
+                if (entityName.parent.kind === 201 /* ExpressionWithTypeArguments */) {
+                    meaning = 793064 /* Type */;
+                    // In a class 'extends' clause we are also looking for a value.
+                    if (ts.isExpressionWithTypeArgumentsInClassExtendsClause(entityName.parent)) {
+                        meaning |= 107455 /* Value */;
                     }
                 }
-                var errorNode = node.name || node;
-                if (isConstructor) {
-                    error(errorNode, ts.Diagnostics.Constructor_implementation_is_missing);
-                }
                 else {
-                    // Report different errors regarding non-consecutive blocks of declarations depending on whether
-                    // the node in question is abstract.
-                    if (ts.getModifierFlags(node) & 128 /* Abstract */) {
-                        error(errorNode, ts.Diagnostics.All_declarations_of_an_abstract_method_must_be_consecutive);
-                    }
-                    else {
-                        error(errorNode, ts.Diagnostics.Function_implementation_is_missing_or_not_immediately_following_the_declaration);
-                    }
+                    meaning = 1920 /* Namespace */;
+                }
+                meaning |= 8388608 /* Alias */;
+                var entityNameSymbol = resolveEntityName(entityName, meaning);
+                if (entityNameSymbol) {
+                    return entityNameSymbol;
                 }
             }
-            var duplicateFunctionDeclaration = false;
-            var multipleConstructorImplementation = false;
-            for (var _i = 0, declarations_4 = declarations; _i < declarations_4.length; _i++) {
-                var current = declarations_4[_i];
-                var node = current;
-                var inAmbientContext = ts.isInAmbientContext(node);
-                var inAmbientContextOrInterface = node.parent.kind === 222 /* InterfaceDeclaration */ || node.parent.kind === 159 /* TypeLiteral */ || inAmbientContext;
-                if (inAmbientContextOrInterface) {
-                    // check if declarations are consecutive only if they are non-ambient
-                    // 1. ambient declarations can be interleaved
-                    // i.e. this is legal
-                    //     declare function foo();
-                    //     declare function bar();
-                    //     declare function foo();
-                    // 2. mixing ambient and non-ambient declarations is a separate error that will be reported - do not want to report an extra one
-                    previousDeclaration = undefined;
+            if (entityName.parent.kind === 287 /* JSDocParameterTag */) {
+                var parameter = ts.getParameterFromJSDoc(entityName.parent);
+                return parameter && parameter.symbol;
+            }
+            if (entityName.parent.kind === 145 /* TypeParameter */ && entityName.parent.parent.kind === 290 /* JSDocTemplateTag */) {
+                ts.Debug.assert(!ts.isInJavaScriptFile(entityName)); // Otherwise `isDeclarationName` would have been true.
+                var typeParameter = ts.getTypeParameterFromJsDoc(entityName.parent);
+                return typeParameter && typeParameter.symbol;
+            }
+            if (ts.isPartOfExpression(entityName)) {
+                if (ts.nodeIsMissing(entityName)) {
+                    // Missing entity name.
+                    return undefined;
                 }
-                if (node.kind === 220 /* FunctionDeclaration */ || node.kind === 147 /* MethodDeclaration */ || node.kind === 146 /* MethodSignature */ || node.kind === 148 /* Constructor */) {
-                    var currentNodeFlags = getEffectiveDeclarationFlags(node, flagsToCheck);
-                    someNodeFlags |= currentNodeFlags;
-                    allNodeFlags &= currentNodeFlags;
-                    someHaveQuestionToken = someHaveQuestionToken || ts.hasQuestionToken(node);
-                    allHaveQuestionToken = allHaveQuestionToken && ts.hasQuestionToken(node);
-                    if (ts.nodeIsPresent(node.body) && bodyDeclaration) {
-                        if (isConstructor) {
-                            multipleConstructorImplementation = true;
-                        }
-                        else {
-                            duplicateFunctionDeclaration = true;
-                        }
-                    }
-                    else if (previousDeclaration && previousDeclaration.parent === node.parent && previousDeclaration.end !== node.pos) {
-                        reportImplementationExpectedError(previousDeclaration);
-                    }
-                    if (ts.nodeIsPresent(node.body)) {
-                        if (!bodyDeclaration) {
-                            bodyDeclaration = node;
-                        }
+                if (entityName.kind === 71 /* Identifier */) {
+                    if (ts.isJSXTagName(entityName) && isJsxIntrinsicIdentifier(entityName)) {
+                        return getIntrinsicTagSymbol(entityName.parent);
                     }
-                    else {
-                        hasOverloads = true;
+                    return resolveEntityName(entityName, 107455 /* Value */, /*ignoreErrors*/ false, /*dontResolveAlias*/ true);
+                }
+                else if (entityName.kind === 179 /* PropertyAccessExpression */) {
+                    var symbol = getNodeLinks(entityName).resolvedSymbol;
+                    if (!symbol) {
+                        checkPropertyAccessExpression(entityName);
                     }
-                    previousDeclaration = node;
-                    if (!inAmbientContextOrInterface) {
-                        lastSeenNonAmbientDeclaration = node;
+                    return getNodeLinks(entityName).resolvedSymbol;
+                }
+                else if (entityName.kind === 143 /* QualifiedName */) {
+                    var symbol = getNodeLinks(entityName).resolvedSymbol;
+                    if (!symbol) {
+                        checkQualifiedName(entityName);
                     }
+                    return getNodeLinks(entityName).resolvedSymbol;
                 }
             }
-            if (multipleConstructorImplementation) {
-                ts.forEach(declarations, function (declaration) {
-                    error(declaration, ts.Diagnostics.Multiple_constructor_implementations_are_not_allowed);
-                });
-            }
-            if (duplicateFunctionDeclaration) {
-                ts.forEach(declarations, function (declaration) {
-                    error(declaration.name, ts.Diagnostics.Duplicate_function_implementation);
-                });
+            else if (isTypeReferenceIdentifier(entityName)) {
+                var meaning = (entityName.parent.kind === 159 /* TypeReference */ || entityName.parent.kind === 277 /* JSDocTypeReference */) ? 793064 /* Type */ : 1920 /* Namespace */;
+                return resolveEntityName(entityName, meaning, /*ignoreErrors*/ false, /*dontResolveAlias*/ true);
             }
-            // Abstract methods can't have an implementation -- in particular, they don't need one.
-            if (lastSeenNonAmbientDeclaration && !lastSeenNonAmbientDeclaration.body &&
-                !(ts.getModifierFlags(lastSeenNonAmbientDeclaration) & 128 /* Abstract */) && !lastSeenNonAmbientDeclaration.questionToken) {
-                reportImplementationExpectedError(lastSeenNonAmbientDeclaration);
+            else if (entityName.parent.kind === 253 /* JsxAttribute */) {
+                return getJsxAttributePropertySymbol(entityName.parent);
             }
-            if (hasOverloads) {
-                checkFlagAgreementBetweenOverloads(declarations, bodyDeclaration, flagsToCheck, someNodeFlags, allNodeFlags);
-                checkQuestionTokenAgreementBetweenOverloads(declarations, bodyDeclaration, someHaveQuestionToken, allHaveQuestionToken);
-                if (bodyDeclaration) {
-                    var signatures = getSignaturesOfSymbol(symbol);
-                    var bodySignature = getSignatureFromDeclaration(bodyDeclaration);
-                    for (var _a = 0, signatures_3 = signatures; _a < signatures_3.length; _a++) {
-                        var signature = signatures_3[_a];
-                        if (!isImplementationCompatibleWithOverload(bodySignature, signature)) {
-                            error(signature.declaration, ts.Diagnostics.Overload_signature_is_not_compatible_with_function_implementation);
-                            break;
-                        }
-                    }
-                }
+            if (entityName.parent.kind === 158 /* TypePredicate */) {
+                return resolveEntityName(entityName, /*meaning*/ 1 /* FunctionScopedVariable */);
             }
+            // Do we want to return undefined here?
+            return undefined;
         }
-        function checkExportsOnMergedDeclarations(node) {
-            if (!produceDiagnostics) {
-                return;
+        function getSymbolAtLocation(node) {
+            if (node.kind === 265 /* SourceFile */) {
+                return ts.isExternalModule(node) ? getMergedSymbol(node.symbol) : undefined;
             }
-            // if localSymbol is defined on node then node itself is exported - check is required
-            var symbol = node.localSymbol;
-            if (!symbol) {
-                // local symbol is undefined => this declaration is non-exported.
-                // however symbol might contain other declarations that are exported
-                symbol = getSymbolOfNode(node);
-                if (!(symbol.flags & 7340032 /* Export */)) {
-                    // this is a pure local symbol (all declarations are non-exported) - no need to check anything
-                    return;
-                }
+            if (isInsideWithStatementBody(node)) {
+                // We cannot answer semantic questions within a with block, do not proceed any further
+                return undefined;
             }
-            // run the check only for the first declaration in the list
-            if (ts.getDeclarationOfKind(symbol, node.kind) !== node) {
-                return;
+            if (isDeclarationNameOrImportPropertyName(node)) {
+                // This is a declaration, call getSymbolOfNode
+                return getSymbolOfNode(node.parent);
             }
-            // we use SymbolFlags.ExportValue, SymbolFlags.ExportType and SymbolFlags.ExportNamespace
-            // to denote disjoint declarationSpaces (without making new enum type).
-            var exportedDeclarationSpaces = 0 /* None */;
-            var nonExportedDeclarationSpaces = 0 /* None */;
-            var defaultExportedDeclarationSpaces = 0 /* None */;
-            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                var d = _a[_i];
-                var declarationSpaces = getDeclarationSpaces(d);
-                var effectiveDeclarationFlags = getEffectiveDeclarationFlags(d, 1 /* Export */ | 512 /* Default */);
-                if (effectiveDeclarationFlags & 1 /* Export */) {
-                    if (effectiveDeclarationFlags & 512 /* Default */) {
-                        defaultExportedDeclarationSpaces |= declarationSpaces;
-                    }
-                    else {
-                        exportedDeclarationSpaces |= declarationSpaces;
-                    }
+            else if (ts.isLiteralComputedPropertyDeclarationName(node)) {
+                return getSymbolOfNode(node.parent.parent);
+            }
+            if (node.kind === 71 /* Identifier */) {
+                if (isInRightSideOfImportOrExportAssignment(node)) {
+                    return getSymbolOfEntityNameOrPropertyAccessExpression(node);
                 }
-                else {
-                    nonExportedDeclarationSpaces |= declarationSpaces;
+                else if (node.parent.kind === 176 /* BindingElement */ &&
+                    node.parent.parent.kind === 174 /* ObjectBindingPattern */ &&
+                    node === node.parent.propertyName) {
+                    var typeOfPattern = getTypeOfNode(node.parent.parent);
+                    var propertyDeclaration = typeOfPattern && getPropertyOfType(typeOfPattern, node.text);
+                    if (propertyDeclaration) {
+                        return propertyDeclaration;
+                    }
                 }
             }
-            // Spaces for anything not declared a 'default export'.
-            var nonDefaultExportedDeclarationSpaces = exportedDeclarationSpaces | nonExportedDeclarationSpaces;
-            var commonDeclarationSpacesForExportsAndLocals = exportedDeclarationSpaces & nonExportedDeclarationSpaces;
-            var commonDeclarationSpacesForDefaultAndNonDefault = defaultExportedDeclarationSpaces & nonDefaultExportedDeclarationSpaces;
-            if (commonDeclarationSpacesForExportsAndLocals || commonDeclarationSpacesForDefaultAndNonDefault) {
-                // declaration spaces for exported and non-exported declarations intersect
-                for (var _b = 0, _c = symbol.declarations; _b < _c.length; _b++) {
-                    var d = _c[_b];
-                    var declarationSpaces = getDeclarationSpaces(d);
-                    // Only error on the declarations that contributed to the intersecting spaces.
-                    if (declarationSpaces & commonDeclarationSpacesForDefaultAndNonDefault) {
-                        error(d.name, ts.Diagnostics.Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead, ts.declarationNameToString(d.name));
+            switch (node.kind) {
+                case 71 /* Identifier */:
+                case 179 /* PropertyAccessExpression */:
+                case 143 /* QualifiedName */:
+                    return getSymbolOfEntityNameOrPropertyAccessExpression(node);
+                case 99 /* ThisKeyword */:
+                    var container = ts.getThisContainer(node, /*includeArrowFunctions*/ false);
+                    if (ts.isFunctionLike(container)) {
+                        var sig = getSignatureFromDeclaration(container);
+                        if (sig.thisParameter) {
+                            return sig.thisParameter;
+                        }
                     }
-                    else if (declarationSpaces & commonDeclarationSpacesForExportsAndLocals) {
-                        error(d.name, ts.Diagnostics.Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local, ts.declarationNameToString(d.name));
+                // falls through
+                case 97 /* SuperKeyword */:
+                    var type = ts.isPartOfExpression(node) ? getTypeOfExpression(node) : getTypeFromTypeNode(node);
+                    return type.symbol;
+                case 169 /* ThisType */:
+                    return getTypeFromTypeNode(node).symbol;
+                case 123 /* ConstructorKeyword */:
+                    // constructor keyword for an overload, should take us to the definition if it exist
+                    var constructorDeclaration = node.parent;
+                    if (constructorDeclaration && constructorDeclaration.kind === 152 /* Constructor */) {
+                        return constructorDeclaration.parent.symbol;
                     }
-                }
-            }
-            function getDeclarationSpaces(d) {
-                switch (d.kind) {
-                    case 222 /* InterfaceDeclaration */:
-                        return 2097152 /* ExportType */;
-                    case 225 /* ModuleDeclaration */:
-                        return ts.isAmbientModule(d) || ts.getModuleInstanceState(d) !== 0 /* NonInstantiated */
-                            ? 4194304 /* ExportNamespace */ | 1048576 /* ExportValue */
-                            : 4194304 /* ExportNamespace */;
-                    case 221 /* ClassDeclaration */:
-                    case 224 /* EnumDeclaration */:
-                        return 2097152 /* ExportType */ | 1048576 /* ExportValue */;
-                    case 229 /* ImportEqualsDeclaration */:
-                        var result_2 = 0;
-                        var target = resolveAlias(getSymbolOfNode(d));
-                        ts.forEach(target.declarations, function (d) { result_2 |= getDeclarationSpaces(d); });
-                        return result_2;
-                    default:
-                        return 1048576 /* ExportValue */;
-                }
+                    return undefined;
+                case 9 /* StringLiteral */:
+                    // 1). import x = require("./mo/*gotToDefinitionHere*/d")
+                    // 2). External module name in an import declaration
+                    // 3). Dynamic import call or require in javascript
+                    if ((ts.isExternalModuleImportEqualsDeclaration(node.parent.parent) && ts.getExternalModuleImportEqualsDeclarationExpression(node.parent.parent) === node) ||
+                        ((node.parent.kind === 238 /* ImportDeclaration */ || node.parent.kind === 244 /* ExportDeclaration */) && node.parent.moduleSpecifier === node) ||
+                        ((ts.isInJavaScriptFile(node) && ts.isRequireCall(node.parent, /*checkArgumentIsStringLiteral*/ false)) || ts.isImportCall(node.parent))) {
+                        return resolveExternalModuleName(node, node);
+                    }
+                // falls through
+                case 8 /* NumericLiteral */:
+                    // index access
+                    if (node.parent.kind === 180 /* ElementAccessExpression */ && node.parent.argumentExpression === node) {
+                        var objectType = getTypeOfExpression(node.parent.expression);
+                        if (objectType === unknownType)
+                            return undefined;
+                        var apparentType = getApparentType(objectType);
+                        if (apparentType === unknownType)
+                            return undefined;
+                        return getPropertyOfType(apparentType, node.text);
+                    }
+                    break;
             }
+            return undefined;
         }
-        function checkNonThenableType(type, location, message) {
-            type = getWidenedType(type);
-            if (!isTypeAny(type) && !isTypeNever(type) && isTypeAssignableTo(type, getGlobalThenableType())) {
-                if (location) {
-                    if (!message) {
-                        message = ts.Diagnostics.Operand_for_await_does_not_have_a_valid_callable_then_member;
-                    }
-                    error(location, message);
-                }
-                return unknownType;
+        function getShorthandAssignmentValueSymbol(location) {
+            // The function returns a value symbol of an identifier in the short-hand property assignment.
+            // This is necessary as an identifier in short-hand property assignment can contains two meaning:
+            // property name and property value.
+            if (location && location.kind === 262 /* ShorthandPropertyAssignment */) {
+                return resolveEntityName(location.name, 107455 /* Value */ | 8388608 /* Alias */);
             }
-            return type;
+            return undefined;
         }
-        /**
-          * Gets the "promised type" of a promise.
-          * @param type The type of the promise.
-          * @remarks The "promised type" of a type is the type of the "value" parameter of the "onfulfilled" callback.
-          */
-        function getPromisedType(promise) {
-            //
-            //  { // promise
-            //      then( // thenFunction
-            //          onfulfilled: ( // onfulfilledParameterType
-            //              value: T // valueParameterType
-            //          ) => any
-            //      ): any;
-            //  }
-            //
-            if (isTypeAny(promise)) {
-                return undefined;
+        /** Returns the target of an export specifier without following aliases */
+        function getExportSpecifierLocalTargetSymbol(node) {
+            return node.parent.parent.moduleSpecifier ?
+                getExternalModuleMember(node.parent.parent, node) :
+                resolveEntityName(node.propertyName || node.name, 107455 /* Value */ | 793064 /* Type */ | 1920 /* Namespace */ | 8388608 /* Alias */);
+        }
+        function getTypeOfNode(node) {
+            if (isInsideWithStatementBody(node)) {
+                // We cannot answer semantic questions within a with block, do not proceed any further
+                return unknownType;
             }
-            if (promise.flags & 131072 /* Reference */) {
-                if (promise.target === tryGetGlobalPromiseType()
-                    || promise.target === getGlobalPromiseLikeType()) {
-                    return promise.typeArguments[0];
+            if (ts.isPartOfTypeNode(node)) {
+                var typeFromTypeNode = getTypeFromTypeNode(node);
+                if (typeFromTypeNode && ts.isExpressionWithTypeArgumentsInClassImplementsClause(node)) {
+                    var containingClass = ts.getContainingClass(node);
+                    var classType = getTypeOfNode(containingClass);
+                    typeFromTypeNode = getTypeWithThisArgument(typeFromTypeNode, classType.thisType);
                 }
+                return typeFromTypeNode;
             }
-            var globalPromiseLikeType = getInstantiatedGlobalPromiseLikeType();
-            if (globalPromiseLikeType === emptyObjectType || !isTypeAssignableTo(promise, globalPromiseLikeType)) {
-                return undefined;
+            if (ts.isPartOfExpression(node)) {
+                return getRegularTypeOfExpression(node);
             }
-            var thenFunction = getTypeOfPropertyOfType(promise, "then");
-            if (!thenFunction || isTypeAny(thenFunction)) {
-                return undefined;
+            if (ts.isExpressionWithTypeArgumentsInClassExtendsClause(node)) {
+                // A SyntaxKind.ExpressionWithTypeArguments is considered a type node, except when it occurs in the
+                // extends clause of a class. We handle that case here.
+                var classNode = ts.getContainingClass(node);
+                var classType = getDeclaredTypeOfSymbol(getSymbolOfNode(classNode));
+                var baseType = getBaseTypes(classType)[0];
+                return baseType && getTypeWithThisArgument(baseType, classType.thisType);
             }
-            var thenSignatures = getSignaturesOfType(thenFunction, 0 /* Call */);
-            if (thenSignatures.length === 0) {
-                return undefined;
+            if (isTypeDeclaration(node)) {
+                // In this case, we call getSymbolOfNode instead of getSymbolAtLocation because it is a declaration
+                var symbol = getSymbolOfNode(node);
+                return getDeclaredTypeOfSymbol(symbol);
             }
-            var onfulfilledParameterType = getTypeWithFacts(getUnionType(ts.map(thenSignatures, getTypeOfFirstParameterOfSignature)), 131072 /* NEUndefined */);
-            if (isTypeAny(onfulfilledParameterType)) {
-                return undefined;
+            if (isTypeDeclarationName(node)) {
+                var symbol = getSymbolAtLocation(node);
+                return symbol && getDeclaredTypeOfSymbol(symbol);
             }
-            var onfulfilledParameterSignatures = getSignaturesOfType(onfulfilledParameterType, 0 /* Call */);
-            if (onfulfilledParameterSignatures.length === 0) {
-                return undefined;
+            if (ts.isDeclaration(node)) {
+                // In this case, we call getSymbolOfNode instead of getSymbolAtLocation because it is a declaration
+                var symbol = getSymbolOfNode(node);
+                return getTypeOfSymbol(symbol);
             }
-            return getUnionType(ts.map(onfulfilledParameterSignatures, getTypeOfFirstParameterOfSignature), /*subtypeReduction*/ true);
-        }
-        function getTypeOfFirstParameterOfSignature(signature) {
-            return signature.parameters.length > 0 ? getTypeAtPosition(signature, 0) : neverType;
-        }
-        /**
-          * Gets the "awaited type" of a type.
-          * @param type The type to await.
-          * @remarks The "awaited type" of an expression is its "promised type" if the expression is a
-          * Promise-like type; otherwise, it is the type of the expression. This is used to reflect
-          * The runtime behavior of the `await` keyword.
-          */
-        function getAwaitedType(type) {
-            return checkAwaitedType(type, /*location*/ undefined, /*message*/ undefined);
-        }
-        function checkAwaitedType(type, location, message) {
-            return checkAwaitedTypeWorker(type);
-            function checkAwaitedTypeWorker(type) {
-                if (type.flags & 524288 /* Union */) {
-                    var types = [];
-                    for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                        var constituentType = _a[_i];
-                        types.push(checkAwaitedTypeWorker(constituentType));
-                    }
-                    return getUnionType(types, /*subtypeReduction*/ true);
-                }
-                else {
-                    var promisedType = getPromisedType(type);
-                    if (promisedType === undefined) {
-                        // The type was not a PromiseLike, so it could not be unwrapped any further.
-                        // As long as the type does not have a callable "then" property, it is
-                        // safe to return the type; otherwise, an error will have been reported in
-                        // the call to checkNonThenableType and we will return unknownType.
-                        //
-                        // An example of a non-promise "thenable" might be:
-                        //
-                        //  await { then(): void {} }
-                        //
-                        // The "thenable" does not match the minimal definition for a PromiseLike. When
-                        // a Promise/A+-compatible or ES6 promise tries to adopt this value, the promise
-                        // will never settle. We treat this as an error to help flag an early indicator
-                        // of a runtime problem. If the user wants to return this value from an async
-                        // function, they would need to wrap it in some other value. If they want it to
-                        // be treated as a promise, they can cast to <any>.
-                        return checkNonThenableType(type, location, message);
-                    }
-                    else {
-                        if (type.id === promisedType.id || ts.indexOf(awaitedTypeStack, promisedType.id) >= 0) {
-                            // We have a bad actor in the form of a promise whose promised type is
-                            // the same promise type, or a mutually recursive promise. Return the
-                            // unknown type as we cannot guess the shape. If this were the actual
-                            // case in the JavaScript, this Promise would never resolve.
-                            //
-                            // An example of a bad actor with a singly-recursive promise type might
-                            // be:
-                            //
-                            //  interface BadPromise {
-                            //      then(
-                            //          onfulfilled: (value: BadPromise) => any,
-                            //          onrejected: (error: any) => any): BadPromise;
-                            //  }
-                            //
-                            // The above interface will pass the PromiseLike check, and return a
-                            // promised type of `BadPromise`. Since this is a self reference, we
-                            // don't want to keep recursing ad infinitum.
-                            //
-                            // An example of a bad actor in the form of a mutually-recursive
-                            // promise type might be:
-                            //
-                            //  interface BadPromiseA {
-                            //      then(
-                            //          onfulfilled: (value: BadPromiseB) => any,
-                            //          onrejected: (error: any) => any): BadPromiseB;
-                            //  }
-                            //
-                            //  interface BadPromiseB {
-                            //      then(
-                            //          onfulfilled: (value: BadPromiseA) => any,
-                            //          onrejected: (error: any) => any): BadPromiseA;
-                            //  }
-                            //
-                            if (location) {
-                                error(location, ts.Diagnostics._0_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method, symbolToString(type.symbol));
-                            }
-                            return unknownType;
-                        }
-                        // Keep track of the type we're about to unwrap to avoid bad recursive promise types.
-                        // See the comments above for more information.
-                        awaitedTypeStack.push(type.id);
-                        var awaitedType = checkAwaitedTypeWorker(promisedType);
-                        awaitedTypeStack.pop();
-                        return awaitedType;
-                    }
-                }
+            if (isDeclarationNameOrImportPropertyName(node)) {
+                var symbol = getSymbolAtLocation(node);
+                return symbol && getTypeOfSymbol(symbol);
             }
-        }
-        /**
-         * Checks that the return type provided is an instantiation of the global Promise<T> type
-         * and returns the awaited type of the return type.
-         *
-         * @param returnType The return type of a FunctionLikeDeclaration
-         * @param location The node on which to report the error.
-         */
-        function checkCorrectPromiseType(returnType, location, diagnostic, typeName) {
-            if (returnType === unknownType) {
-                // The return type already had some other error, so we ignore and return
-                // the unknown type.
-                return unknownType;
+            if (ts.isBindingPattern(node)) {
+                return getTypeForVariableLikeDeclaration(node.parent, /*includeOptionality*/ true);
+            }
+            if (isInRightSideOfImportOrExportAssignment(node)) {
+                var symbol = getSymbolAtLocation(node);
+                var declaredType = symbol && getDeclaredTypeOfSymbol(symbol);
+                return declaredType !== unknownType ? declaredType : getTypeOfSymbol(symbol);
             }
-            var globalPromiseType = getGlobalPromiseType();
-            if (globalPromiseType === emptyGenericType
-                || globalPromiseType === getTargetType(returnType)) {
-                // Either we couldn't resolve the global promise type, which would have already
-                // reported an error, or we could resolve it and the return type is a valid type
-                // reference to the global type. In either case, we return the awaited type for
-                // the return type.
-                return checkAwaitedType(returnType, location, ts.Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type);
-            }
-            // The promise type was not a valid type reference to the global promise type, so we
-            // report an error and return the unknown type.
-            error(location, diagnostic, typeName);
             return unknownType;
         }
-        /**
-          * Checks the return type of an async function to ensure it is a compatible
-          * Promise implementation.
-          * @param node The signature to check
-          * @param returnType The return type for the function
-          * @remarks
-          * This checks that an async function has a valid Promise-compatible return type,
-          * and returns the *awaited type* of the promise. An async function has a valid
-          * Promise-compatible return type if the resolved value of the return type has a
-          * construct signature that takes in an `initializer` function that in turn supplies
-          * a `resolve` function as one of its arguments and results in an object with a
-          * callable `then` signature.
-          */
-        function checkAsyncFunctionReturnType(node) {
-            if (languageVersion >= 2 /* ES6 */) {
-                var returnType = getTypeFromTypeNode(node.type);
-                return checkCorrectPromiseType(returnType, node.type, ts.Diagnostics.The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type);
-            }
-            var globalPromiseConstructorLikeType = getGlobalPromiseConstructorLikeType();
-            if (globalPromiseConstructorLikeType === emptyObjectType) {
-                // If we couldn't resolve the global PromiseConstructorLike type we cannot verify
-                // compatibility with __awaiter.
-                return unknownType;
-            }
-            // As part of our emit for an async function, we will need to emit the entity name of
-            // the return type annotation as an expression. To meet the necessary runtime semantics
-            // for __awaiter, we must also check that the type of the declaration (e.g. the static
-            // side or "constructor" of the promise type) is compatible `PromiseConstructorLike`.
-            //
-            // An example might be (from lib.es6.d.ts):
-            //
-            //  interface Promise<T> { ... }
-            //  interface PromiseConstructor {
-            //      new <T>(...): Promise<T>;
-            //  }
-            //  declare var Promise: PromiseConstructor;
-            //
-            // When an async function declares a return type annotation of `Promise<T>`, we
-            // need to get the type of the `Promise` variable declaration above, which would
-            // be `PromiseConstructor`.
-            //
-            // The same case applies to a class:
-            //
-            //  declare class Promise<T> {
-            //      constructor(...);
-            //      then<U>(...): Promise<U>;
-            //  }
-            //
-            // When we get the type of the `Promise` symbol here, we get the type of the static
-            // side of the `Promise` class, which would be `{ new <T>(...): Promise<T> }`.
-            var promiseType = getTypeFromTypeNode(node.type);
-            if (promiseType === unknownType && compilerOptions.isolatedModules) {
-                // If we are compiling with isolatedModules, we may not be able to resolve the
-                // type as a value. As such, we will just return unknownType;
-                return unknownType;
+        // Gets the type of object literal or array literal of destructuring assignment.
+        // { a } from
+        //     for ( { a } of elems) {
+        //     }
+        // [ a ] from
+        //     [a] = [ some array ...]
+        function getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(expr) {
+            ts.Debug.assert(expr.kind === 178 /* ObjectLiteralExpression */ || expr.kind === 177 /* ArrayLiteralExpression */);
+            // If this is from "for of"
+            //     for ( { a } of elems) {
+            //     }
+            if (expr.parent.kind === 216 /* ForOfStatement */) {
+                var iteratedType = checkRightHandSideOfForOf(expr.parent.expression, expr.parent.awaitModifier);
+                return checkDestructuringAssignment(expr, iteratedType || unknownType);
             }
-            var promiseConstructor = getNodeLinks(node.type).resolvedSymbol;
-            if (!promiseConstructor || !symbolIsValue(promiseConstructor)) {
-                // try to fall back to global promise type.
-                var typeName = promiseConstructor
-                    ? symbolToString(promiseConstructor)
-                    : typeToString(promiseType);
-                return checkCorrectPromiseType(promiseType, node.type, ts.Diagnostics.Type_0_is_not_a_valid_async_function_return_type, typeName);
-            }
-            // If the Promise constructor, resolved locally, is an alias symbol we should mark it as referenced.
-            checkReturnTypeAnnotationAsExpression(node);
-            // Validate the promise constructor type.
-            var promiseConstructorType = getTypeOfSymbol(promiseConstructor);
-            if (!checkTypeAssignableTo(promiseConstructorType, globalPromiseConstructorLikeType, node.type, ts.Diagnostics.Type_0_is_not_a_valid_async_function_return_type)) {
-                return unknownType;
+            // If this is from "for" initializer
+            //     for ({a } = elems[0];.....) { }
+            if (expr.parent.kind === 194 /* BinaryExpression */) {
+                var iteratedType = getTypeOfExpression(expr.parent.right);
+                return checkDestructuringAssignment(expr, iteratedType || unknownType);
             }
-            // Verify there is no local declaration that could collide with the promise constructor.
-            var promiseName = ts.getEntityNameFromTypeNode(node.type);
-            var promiseNameOrNamespaceRoot = getFirstIdentifier(promiseName);
-            var rootSymbol = getSymbol(node.locals, promiseNameOrNamespaceRoot.text, 107455 /* Value */);
-            if (rootSymbol) {
-                error(rootSymbol.valueDeclaration, ts.Diagnostics.Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions, promiseNameOrNamespaceRoot.text, getFullyQualifiedName(promiseConstructor));
-                return unknownType;
+            // If this is from nested object binding pattern
+            //     for ({ skills: { primary, secondary } } = multiRobot, i = 0; i < 1; i++) {
+            if (expr.parent.kind === 261 /* PropertyAssignment */) {
+                var typeOfParentObjectLiteral = getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(expr.parent.parent);
+                return checkObjectLiteralDestructuringPropertyAssignment(typeOfParentObjectLiteral || unknownType, expr.parent);
             }
-            // Get and return the awaited type of the return type.
-            return checkAwaitedType(promiseType, node, ts.Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type);
+            // Array literal assignment - array destructuring pattern
+            ts.Debug.assert(expr.parent.kind === 177 /* ArrayLiteralExpression */);
+            //    [{ property1: p1, property2 }] = elems;
+            var typeOfArrayLiteral = getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(expr.parent);
+            var elementType = checkIteratedTypeOrElementType(typeOfArrayLiteral || unknownType, expr.parent, /*allowStringInput*/ false, /*allowAsyncIterables*/ false) || unknownType;
+            return checkArrayLiteralDestructuringElementAssignment(expr.parent, typeOfArrayLiteral, ts.indexOf(expr.parent.elements, expr), elementType || unknownType);
         }
-        /** Check a decorator */
-        function checkDecorator(node) {
-            var signature = getResolvedSignature(node);
-            var returnType = getReturnTypeOfSignature(signature);
-            if (returnType.flags & 1 /* Any */) {
-                return;
+        // Gets the property symbol corresponding to the property in destructuring assignment
+        // 'property1' from
+        //     for ( { property1: a } of elems) {
+        //     }
+        // 'property1' at location 'a' from:
+        //     [a] = [ property1, property2 ]
+        function getPropertySymbolOfDestructuringAssignment(location) {
+            // Get the type of the object or array literal and then look for property of given name in the type
+            var typeOfObjectLiteral = getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(location.parent.parent);
+            return typeOfObjectLiteral && getPropertyOfType(typeOfObjectLiteral, location.text);
+        }
+        function getRegularTypeOfExpression(expr) {
+            if (ts.isRightSideOfQualifiedNameOrPropertyAccess(expr)) {
+                expr = expr.parent;
             }
-            var expectedReturnType;
-            var headMessage = getDiagnosticHeadMessageForDecoratorResolution(node);
-            var errorInfo;
-            switch (node.parent.kind) {
-                case 221 /* ClassDeclaration */:
-                    var classSymbol = getSymbolOfNode(node.parent);
-                    var classConstructorType = getTypeOfSymbol(classSymbol);
-                    expectedReturnType = getUnionType([classConstructorType, voidType]);
-                    break;
-                case 142 /* Parameter */:
-                    expectedReturnType = voidType;
-                    errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any);
-                    break;
-                case 145 /* PropertyDeclaration */:
-                    expectedReturnType = voidType;
-                    errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.The_return_type_of_a_property_decorator_function_must_be_either_void_or_any);
-                    break;
-                case 147 /* MethodDeclaration */:
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                    var methodType = getTypeOfNode(node.parent);
-                    var descriptorType = createTypedPropertyDescriptorType(methodType);
-                    expectedReturnType = getUnionType([descriptorType, voidType]);
-                    break;
+            return getRegularTypeOfLiteralType(getTypeOfExpression(expr));
+        }
+        /**
+         * Gets either the static or instance type of a class element, based on
+         * whether the element is declared as "static".
+         */
+        function getParentTypeOfClassElement(node) {
+            var classSymbol = getSymbolOfNode(node.parent);
+            return ts.getModifierFlags(node) & 32 /* Static */
+                ? getTypeOfSymbol(classSymbol)
+                : getDeclaredTypeOfSymbol(classSymbol);
+        }
+        // Return the list of properties of the given type, augmented with properties from Function
+        // if the type has call or construct signatures
+        function getAugmentedPropertiesOfType(type) {
+            type = getApparentType(type);
+            var propsByName = createSymbolTable(getPropertiesOfType(type));
+            if (getSignaturesOfType(type, 0 /* Call */).length || getSignaturesOfType(type, 1 /* Construct */).length) {
+                ts.forEach(getPropertiesOfType(globalFunctionType), function (p) {
+                    if (!propsByName.has(p.name)) {
+                        propsByName.set(p.name, p);
+                    }
+                });
             }
-            checkTypeAssignableTo(returnType, expectedReturnType, node, headMessage, errorInfo);
+            return getNamedMembers(propsByName);
         }
-        /** Checks a type reference node as an expression. */
-        function checkTypeNodeAsExpression(node) {
-            // When we are emitting type metadata for decorators, we need to try to check the type
-            // as if it were an expression so that we can emit the type in a value position when we
-            // serialize the type metadata.
-            if (node && node.kind === 155 /* TypeReference */) {
-                var root = getFirstIdentifier(node.typeName);
-                var meaning = root.parent.kind === 155 /* TypeReference */ ? 793064 /* Type */ : 1920 /* Namespace */;
-                // Resolve type so we know which symbol is referenced
-                var rootSymbol = resolveName(root, root.text, meaning | 8388608 /* Alias */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined);
-                // Resolved symbol is alias
-                if (rootSymbol && rootSymbol.flags & 8388608 /* Alias */) {
-                    var aliasTarget = resolveAlias(rootSymbol);
-                    // If alias has value symbol - mark alias as referenced
-                    if (aliasTarget.flags & 107455 /* Value */ && !isConstEnumOrConstEnumOnlyModule(resolveAlias(rootSymbol))) {
-                        markAliasSymbolAsReferenced(rootSymbol);
+        function getRootSymbols(symbol) {
+            if (ts.getCheckFlags(symbol) & 6 /* Synthetic */) {
+                var symbols_4 = [];
+                var name_33 = symbol.name;
+                ts.forEach(getSymbolLinks(symbol).containingType.types, function (t) {
+                    var symbol = getPropertyOfType(t, name_33);
+                    if (symbol) {
+                        symbols_4.push(symbol);
                     }
+                });
+                return symbols_4;
+            }
+            else if (symbol.flags & 134217728 /* Transient */) {
+                var transient = symbol;
+                if (transient.leftSpread) {
+                    return getRootSymbols(transient.leftSpread).concat(getRootSymbols(transient.rightSpread));
+                }
+                if (transient.syntheticOrigin) {
+                    return getRootSymbols(transient.syntheticOrigin);
+                }
+                var target = void 0;
+                var next = symbol;
+                while (next = getSymbolLinks(next).target) {
+                    target = next;
+                }
+                if (target) {
+                    return [target];
                 }
             }
+            return [symbol];
         }
-        /**
-          * Checks the type annotation of an accessor declaration or property declaration as
-          * an expression if it is a type reference to a type with a value declaration.
-          */
-        function checkTypeAnnotationAsExpression(node) {
-            checkTypeNodeAsExpression(node.type);
-        }
-        function checkReturnTypeAnnotationAsExpression(node) {
-            checkTypeNodeAsExpression(node.type);
-        }
-        /** Checks the type annotation of the parameters of a function/method or the constructor of a class as expressions */
-        function checkParameterTypeAnnotationsAsExpressions(node) {
-            // ensure all type annotations with a value declaration are checked as an expression
-            for (var _i = 0, _a = node.parameters; _i < _a.length; _i++) {
-                var parameter = _a[_i];
-                checkTypeAnnotationAsExpression(parameter);
+        // Emitter support
+        function isArgumentsLocalBinding(node) {
+            if (!ts.isGeneratedIdentifier(node)) {
+                node = ts.getParseTreeNode(node, ts.isIdentifier);
+                if (node) {
+                    var isPropertyName_1 = node.parent.kind === 179 /* PropertyAccessExpression */ && node.parent.name === node;
+                    return !isPropertyName_1 && getReferencedValueSymbol(node) === argumentsSymbol;
+                }
             }
+            return false;
         }
-        /** Check the decorators of a node */
-        function checkDecorators(node) {
-            if (!node.decorators) {
-                return;
+        function moduleExportsSomeValue(moduleReferenceExpression) {
+            var moduleSymbol = resolveExternalModuleName(moduleReferenceExpression.parent, moduleReferenceExpression);
+            if (!moduleSymbol || ts.isShorthandAmbientModuleSymbol(moduleSymbol)) {
+                // If the module is not found or is shorthand, assume that it may export a value.
+                return true;
             }
-            // skip this check for nodes that cannot have decorators. These should have already had an error reported by
-            // checkGrammarDecorators.
-            if (!ts.nodeCanBeDecorated(node)) {
-                return;
+            var hasExportAssignment = hasExportAssignmentSymbol(moduleSymbol);
+            // if module has export assignment then 'resolveExternalModuleSymbol' will return resolved symbol for export assignment
+            // otherwise it will return moduleSymbol itself
+            moduleSymbol = resolveExternalModuleSymbol(moduleSymbol);
+            var symbolLinks = getSymbolLinks(moduleSymbol);
+            if (symbolLinks.exportsSomeValue === undefined) {
+                // for export assignments - check if resolved symbol for RHS is itself a value
+                // otherwise - check if at least one export is value
+                symbolLinks.exportsSomeValue = hasExportAssignment
+                    ? !!(moduleSymbol.flags & 107455 /* Value */)
+                    : ts.forEachEntry(getExportsOfModule(moduleSymbol), isValue);
             }
-            if (!compilerOptions.experimentalDecorators) {
-                error(node, ts.Diagnostics.Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning);
+            return symbolLinks.exportsSomeValue;
+            function isValue(s) {
+                s = resolveSymbol(s);
+                return s && !!(s.flags & 107455 /* Value */);
             }
-            if (compilerOptions.emitDecoratorMetadata) {
-                // we only need to perform these checks if we are emitting serialized type metadata for the target of a decorator.
-                switch (node.kind) {
-                    case 221 /* ClassDeclaration */:
-                        var constructor = ts.getFirstConstructorWithBody(node);
-                        if (constructor) {
-                            checkParameterTypeAnnotationsAsExpressions(constructor);
+        }
+        function isNameOfModuleOrEnumDeclaration(node) {
+            var parent = node.parent;
+            return parent && ts.isModuleOrEnumDeclaration(parent) && node === parent.name;
+        }
+        // When resolved as an expression identifier, if the given node references an exported entity, return the declaration
+        // node of the exported entity's container. Otherwise, return undefined.
+        function getReferencedExportContainer(node, prefixLocals) {
+            node = ts.getParseTreeNode(node, ts.isIdentifier);
+            if (node) {
+                // When resolving the export container for the name of a module or enum
+                // declaration, we need to start resolution at the declaration's container.
+                // Otherwise, we could incorrectly resolve the export container as the
+                // declaration if it contains an exported member with the same name.
+                var symbol = getReferencedValueSymbol(node, /*startInDeclarationContainer*/ isNameOfModuleOrEnumDeclaration(node));
+                if (symbol) {
+                    if (symbol.flags & 1048576 /* ExportValue */) {
+                        // If we reference an exported entity within the same module declaration, then whether
+                        // we prefix depends on the kind of entity. SymbolFlags.ExportHasLocal encompasses all the
+                        // kinds that we do NOT prefix.
+                        var exportSymbol = getMergedSymbol(symbol.exportSymbol);
+                        if (!prefixLocals && exportSymbol.flags & 944 /* ExportHasLocal */) {
+                            return undefined;
                         }
-                        break;
-                    case 147 /* MethodDeclaration */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                        checkParameterTypeAnnotationsAsExpressions(node);
-                        checkReturnTypeAnnotationAsExpression(node);
-                        break;
-                    case 145 /* PropertyDeclaration */:
-                    case 142 /* Parameter */:
-                        checkTypeAnnotationAsExpression(node);
-                        break;
+                        symbol = exportSymbol;
+                    }
+                    var parentSymbol_1 = getParentOfSymbol(symbol);
+                    if (parentSymbol_1) {
+                        if (parentSymbol_1.flags & 512 /* ValueModule */ && parentSymbol_1.valueDeclaration.kind === 265 /* SourceFile */) {
+                            var symbolFile = parentSymbol_1.valueDeclaration;
+                            var referenceFile = ts.getSourceFileOfNode(node);
+                            // If `node` accesses an export and that export isn't in the same file, then symbol is a namespace export, so return undefined.
+                            var symbolIsUmdExport = symbolFile !== referenceFile;
+                            return symbolIsUmdExport ? undefined : symbolFile;
+                        }
+                        return ts.findAncestor(node.parent, function (n) { return ts.isModuleOrEnumDeclaration(n) && getSymbolOfNode(n) === parentSymbol_1; });
+                    }
                 }
             }
-            ts.forEach(node.decorators, checkDecorator);
         }
-        function checkFunctionDeclaration(node) {
-            if (produceDiagnostics) {
-                checkFunctionOrMethodDeclaration(node) || checkGrammarForGenerator(node);
-                checkCollisionWithCapturedSuperVariable(node, node.name);
-                checkCollisionWithCapturedThisVariable(node, node.name);
-                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
-                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
+        // When resolved as an expression identifier, if the given node references an import, return the declaration of
+        // that import. Otherwise, return undefined.
+        function getReferencedImportDeclaration(node) {
+            node = ts.getParseTreeNode(node, ts.isIdentifier);
+            if (node) {
+                var symbol = getReferencedValueSymbol(node);
+                // We should only get the declaration of an alias if there isn't a local value
+                // declaration for the symbol
+                if (isNonLocalAlias(symbol, /*excludes*/ 107455 /* Value */)) {
+                    return getDeclarationOfAliasSymbol(symbol);
+                }
             }
+            return undefined;
         }
-        function checkFunctionOrMethodDeclaration(node) {
-            checkDecorators(node);
-            checkSignatureDeclaration(node);
-            var isAsync = ts.isAsyncFunctionLike(node);
-            // Do not use hasDynamicName here, because that returns false for well known symbols.
-            // We want to perform checkComputedPropertyName for all computed properties, including
-            // well known symbols.
-            if (node.name && node.name.kind === 140 /* ComputedPropertyName */) {
-                // This check will account for methods in class/interface declarations,
-                // as well as accessors in classes/object literals
-                checkComputedPropertyName(node.name);
-            }
-            if (!ts.hasDynamicName(node)) {
-                // first we want to check the local symbol that contain this declaration
-                // - if node.localSymbol !== undefined - this is current declaration is exported and localSymbol points to the local symbol
-                // - if node.localSymbol === undefined - this node is non-exported so we can just pick the result of getSymbolOfNode
-                var symbol = getSymbolOfNode(node);
-                var localSymbol = node.localSymbol || symbol;
-                // Since the javascript won't do semantic analysis like typescript,
-                // if the javascript file comes before the typescript file and both contain same name functions,
-                // checkFunctionOrConstructorSymbol wouldn't be called if we didnt ignore javascript function.
-                var firstDeclaration = ts.forEach(localSymbol.declarations, 
-                // Get first non javascript function declaration
-                function (declaration) { return declaration.kind === node.kind && !ts.isSourceFileJavaScript(ts.getSourceFileOfNode(declaration)) ?
-                    declaration : undefined; });
-                // Only type check the symbol once
-                if (node === firstDeclaration) {
-                    checkFunctionOrConstructorSymbol(localSymbol);
-                }
-                if (symbol.parent) {
-                    // run check once for the first declaration
-                    if (ts.getDeclarationOfKind(symbol, node.kind) === node) {
-                        // run check on export symbol to check that modifiers agree across all exported declarations
-                        checkFunctionOrConstructorSymbol(symbol);
+        function isSymbolOfDeclarationWithCollidingName(symbol) {
+            if (symbol.flags & 418 /* BlockScoped */) {
+                var links = getSymbolLinks(symbol);
+                if (links.isDeclarationWithCollidingName === undefined) {
+                    var container = ts.getEnclosingBlockScopeContainer(symbol.valueDeclaration);
+                    if (ts.isStatementWithLocals(container)) {
+                        var nodeLinks_1 = getNodeLinks(symbol.valueDeclaration);
+                        if (!!resolveName(container.parent, symbol.name, 107455 /* Value */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined)) {
+                            // redeclaration - always should be renamed
+                            links.isDeclarationWithCollidingName = true;
+                        }
+                        else if (nodeLinks_1.flags & 131072 /* CapturedBlockScopedBinding */) {
+                            // binding is captured in the function
+                            // should be renamed if:
+                            // - binding is not top level - top level bindings never collide with anything
+                            // AND
+                            //   - binding is not declared in loop, should be renamed to avoid name reuse across siblings
+                            //     let a, b
+                            //     { let x = 1; a = () => x;  }
+                            //     { let x = 100; b = () => x; }
+                            //     console.log(a()); // should print '1'
+                            //     console.log(b()); // should print '100'
+                            //     OR
+                            //   - binding is declared inside loop but not in inside initializer of iteration statement or directly inside loop body
+                            //     * variables from initializer are passed to rewritten loop body as parameters so they are not captured directly
+                            //     * variables that are declared immediately in loop body will become top level variable after loop is rewritten and thus
+                            //       they will not collide with anything
+                            var isDeclaredInLoop = nodeLinks_1.flags & 262144 /* BlockScopedBindingInLoop */;
+                            var inLoopInitializer = ts.isIterationStatement(container, /*lookInLabeledStatements*/ false);
+                            var inLoopBodyBlock = container.kind === 207 /* Block */ && ts.isIterationStatement(container.parent, /*lookInLabeledStatements*/ false);
+                            links.isDeclarationWithCollidingName = !ts.isBlockScopedContainerTopLevel(container) && (!isDeclaredInLoop || (!inLoopInitializer && !inLoopBodyBlock));
+                        }
+                        else {
+                            links.isDeclarationWithCollidingName = false;
+                        }
                     }
                 }
+                return links.isDeclarationWithCollidingName;
             }
-            checkSourceElement(node.body);
-            if (!node.asteriskToken) {
-                var returnOrPromisedType = node.type && (isAsync ? checkAsyncFunctionReturnType(node) : getTypeFromTypeNode(node.type));
-                checkAllCodePathsInNonVoidFunctionReturnOrThrow(node, returnOrPromisedType);
-            }
-            if (produceDiagnostics && !node.type) {
-                // Report an implicit any error if there is no body, no explicit return type, and node is not a private method
-                // in an ambient context
-                if (compilerOptions.noImplicitAny && ts.nodeIsMissing(node.body) && !isPrivateWithinAmbient(node)) {
-                    reportImplicitAnyError(node, anyType);
+            return false;
+        }
+        // When resolved as an expression identifier, if the given node references a nested block scoped entity with
+        // a name that either hides an existing name or might hide it when compiled downlevel,
+        // return the declaration of that entity. Otherwise, return undefined.
+        function getReferencedDeclarationWithCollidingName(node) {
+            if (!ts.isGeneratedIdentifier(node)) {
+                node = ts.getParseTreeNode(node, ts.isIdentifier);
+                if (node) {
+                    var symbol = getReferencedValueSymbol(node);
+                    if (symbol && isSymbolOfDeclarationWithCollidingName(symbol)) {
+                        return symbol.valueDeclaration;
+                    }
                 }
-                if (node.asteriskToken && ts.nodeIsPresent(node.body)) {
-                    // A generator with a body and no type annotation can still cause errors. It can error if the
-                    // yielded values have no common supertype, or it can give an implicit any error if it has no
-                    // yielded values. The only way to trigger these errors is to try checking its return type.
-                    getReturnTypeOfSignature(getSignatureFromDeclaration(node));
+            }
+            return undefined;
+        }
+        // Return true if the given node is a declaration of a nested block scoped entity with a name that either hides an
+        // existing name or might hide a name when compiled downlevel
+        function isDeclarationWithCollidingName(node) {
+            node = ts.getParseTreeNode(node, ts.isDeclaration);
+            if (node) {
+                var symbol = getSymbolOfNode(node);
+                if (symbol) {
+                    return isSymbolOfDeclarationWithCollidingName(symbol);
                 }
             }
-            registerForUnusedIdentifiersCheck(node);
+            return false;
         }
-        function registerForUnusedIdentifiersCheck(node) {
-            if (deferredUnusedIdentifierNodes) {
-                deferredUnusedIdentifierNodes.push(node);
+        function isValueAliasDeclaration(node) {
+            switch (node.kind) {
+                case 237 /* ImportEqualsDeclaration */:
+                case 239 /* ImportClause */:
+                case 240 /* NamespaceImport */:
+                case 242 /* ImportSpecifier */:
+                case 246 /* ExportSpecifier */:
+                    return isAliasResolvedToValue(getSymbolOfNode(node) || unknownSymbol);
+                case 244 /* ExportDeclaration */:
+                    var exportClause = node.exportClause;
+                    return exportClause && ts.forEach(exportClause.elements, isValueAliasDeclaration);
+                case 243 /* ExportAssignment */:
+                    return node.expression
+                        && node.expression.kind === 71 /* Identifier */
+                        ? isAliasResolvedToValue(getSymbolOfNode(node) || unknownSymbol)
+                        : true;
             }
+            return false;
         }
-        function checkUnusedIdentifiers() {
-            if (deferredUnusedIdentifierNodes) {
-                for (var _i = 0, deferredUnusedIdentifierNodes_1 = deferredUnusedIdentifierNodes; _i < deferredUnusedIdentifierNodes_1.length; _i++) {
-                    var node = deferredUnusedIdentifierNodes_1[_i];
-                    switch (node.kind) {
-                        case 256 /* SourceFile */:
-                        case 225 /* ModuleDeclaration */:
-                            checkUnusedModuleMembers(node);
-                            break;
-                        case 221 /* ClassDeclaration */:
-                        case 192 /* ClassExpression */:
-                            checkUnusedClassMembers(node);
-                            checkUnusedTypeParameters(node);
-                            break;
-                        case 222 /* InterfaceDeclaration */:
-                            checkUnusedTypeParameters(node);
-                            break;
-                        case 199 /* Block */:
-                        case 227 /* CaseBlock */:
-                        case 206 /* ForStatement */:
-                        case 207 /* ForInStatement */:
-                        case 208 /* ForOfStatement */:
-                            checkUnusedLocalsAndParameters(node);
-                            break;
-                        case 148 /* Constructor */:
-                        case 179 /* FunctionExpression */:
-                        case 220 /* FunctionDeclaration */:
-                        case 180 /* ArrowFunction */:
-                        case 147 /* MethodDeclaration */:
-                        case 149 /* GetAccessor */:
-                        case 150 /* SetAccessor */:
-                            if (node.body) {
-                                checkUnusedLocalsAndParameters(node);
-                            }
-                            checkUnusedTypeParameters(node);
-                            break;
-                        case 146 /* MethodSignature */:
-                        case 151 /* CallSignature */:
-                        case 152 /* ConstructSignature */:
-                        case 153 /* IndexSignature */:
-                        case 156 /* FunctionType */:
-                        case 157 /* ConstructorType */:
-                            checkUnusedTypeParameters(node);
-                            break;
-                    }
-                    ;
-                }
+        function isTopLevelValueImportEqualsWithEntityName(node) {
+            node = ts.getParseTreeNode(node, ts.isImportEqualsDeclaration);
+            if (node === undefined || node.parent.kind !== 265 /* SourceFile */ || !ts.isInternalModuleImportEqualsDeclaration(node)) {
+                // parent is not source file or it is not reference to internal module
+                return false;
             }
+            var isValue = isAliasResolvedToValue(getSymbolOfNode(node));
+            return isValue && node.moduleReference && !ts.nodeIsMissing(node.moduleReference);
         }
-        function checkUnusedLocalsAndParameters(node) {
-            if (node.parent.kind !== 222 /* InterfaceDeclaration */ && noUnusedIdentifiers && !ts.isInAmbientContext(node)) {
-                var _loop_1 = function (key) {
-                    var local = node.locals[key];
-                    if (!local.isReferenced) {
-                        if (local.valueDeclaration && local.valueDeclaration.kind === 142 /* Parameter */) {
-                            var parameter = local.valueDeclaration;
-                            if (compilerOptions.noUnusedParameters &&
-                                !ts.isParameterPropertyDeclaration(parameter) &&
-                                !parameterIsThisKeyword(parameter) &&
-                                !parameterNameStartsWithUnderscore(parameter)) {
-                                error(local.valueDeclaration.name, ts.Diagnostics._0_is_declared_but_never_used, local.name);
-                            }
-                        }
-                        else if (compilerOptions.noUnusedLocals) {
-                            ts.forEach(local.declarations, function (d) { return error(d.name || d, ts.Diagnostics._0_is_declared_but_never_used, local.name); });
-                        }
-                    }
-                };
-                for (var key in node.locals) {
-                    _loop_1(key);
+        function isAliasResolvedToValue(symbol) {
+            var target = resolveAlias(symbol);
+            if (target === unknownSymbol) {
+                return true;
+            }
+            // const enums and modules that contain only const enums are not considered values from the emit perspective
+            // unless 'preserveConstEnums' option is set to true
+            return target.flags & 107455 /* Value */ &&
+                (compilerOptions.preserveConstEnums || !isConstEnumOrConstEnumOnlyModule(target));
+        }
+        function isConstEnumOrConstEnumOnlyModule(s) {
+            return isConstEnumSymbol(s) || s.constEnumOnlyModule;
+        }
+        function isReferencedAliasDeclaration(node, checkChildren) {
+            if (ts.isAliasSymbolDeclaration(node)) {
+                var symbol = getSymbolOfNode(node);
+                if (symbol && getSymbolLinks(symbol).referenced) {
+                    return true;
                 }
             }
+            if (checkChildren) {
+                return ts.forEachChild(node, function (node) { return isReferencedAliasDeclaration(node, checkChildren); });
+            }
+            return false;
+        }
+        function isImplementationOfOverload(node) {
+            if (ts.nodeIsPresent(node.body)) {
+                var symbol = getSymbolOfNode(node);
+                var signaturesOfSymbol = getSignaturesOfSymbol(symbol);
+                // If this function body corresponds to function with multiple signature, it is implementation of overload
+                // e.g.: function foo(a: string): string;
+                //       function foo(a: number): number;
+                //       function foo(a: any) { // This is implementation of the overloads
+                //           return a;
+                //       }
+                return signaturesOfSymbol.length > 1 ||
+                    // If there is single signature for the symbol, it is overload if that signature isn't coming from the node
+                    // e.g.: function foo(a: string): string;
+                    //       function foo(a: any) { // This is implementation of the overloads
+                    //           return a;
+                    //       }
+                    (signaturesOfSymbol.length === 1 && signaturesOfSymbol[0].declaration !== node);
+            }
+            return false;
         }
-        function parameterIsThisKeyword(parameter) {
-            return parameter.name && parameter.name.originalKeywordKind === 97 /* ThisKeyword */;
+        function isRequiredInitializedParameter(parameter) {
+            return strictNullChecks &&
+                !isOptionalParameter(parameter) &&
+                parameter.initializer &&
+                !(ts.getModifierFlags(parameter) & 92 /* ParameterPropertyModifier */);
         }
-        function parameterNameStartsWithUnderscore(parameter) {
-            return parameter.name && parameter.name.kind === 69 /* Identifier */ && parameter.name.text.charCodeAt(0) === 95 /* _ */;
+        function isOptionalUninitializedParameterProperty(parameter) {
+            return strictNullChecks &&
+                isOptionalParameter(parameter) &&
+                !parameter.initializer &&
+                !!(ts.getModifierFlags(parameter) & 92 /* ParameterPropertyModifier */);
         }
-        function checkUnusedClassMembers(node) {
-            if (compilerOptions.noUnusedLocals && !ts.isInAmbientContext(node)) {
-                if (node.members) {
-                    for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
-                        var member = _a[_i];
-                        if (member.kind === 147 /* MethodDeclaration */ || member.kind === 145 /* PropertyDeclaration */) {
-                            if (!member.symbol.isReferenced && ts.getModifierFlags(member) & 8 /* Private */) {
-                                error(member.name, ts.Diagnostics._0_is_declared_but_never_used, member.symbol.name);
-                            }
-                        }
-                        else if (member.kind === 148 /* Constructor */) {
-                            for (var _b = 0, _c = member.parameters; _b < _c.length; _b++) {
-                                var parameter = _c[_b];
-                                if (!parameter.symbol.isReferenced && ts.getModifierFlags(parameter) & 8 /* Private */) {
-                                    error(parameter.name, ts.Diagnostics.Property_0_is_declared_but_never_used, parameter.symbol.name);
-                                }
-                            }
-                        }
-                    }
-                }
-            }
+        function getNodeCheckFlags(node) {
+            return getNodeLinks(node).flags;
         }
-        function checkUnusedTypeParameters(node) {
-            if (compilerOptions.noUnusedLocals && !ts.isInAmbientContext(node)) {
-                if (node.typeParameters) {
-                    // Only report errors on the last declaration for the type parameter container;
-                    // this ensures that all uses have been accounted for.
-                    var symbol = getSymbolOfNode(node);
-                    var lastDeclaration = symbol && symbol.declarations && ts.lastOrUndefined(symbol.declarations);
-                    if (lastDeclaration !== node) {
-                        return;
-                    }
-                    for (var _i = 0, _a = node.typeParameters; _i < _a.length; _i++) {
-                        var typeParameter = _a[_i];
-                        if (!getMergedSymbol(typeParameter.symbol).isReferenced) {
-                            error(typeParameter.name, ts.Diagnostics._0_is_declared_but_never_used, typeParameter.symbol.name);
-                        }
-                    }
-                }
-            }
+        function getEnumMemberValue(node) {
+            computeEnumMemberValues(node.parent);
+            return getNodeLinks(node).enumMemberValue;
         }
-        function checkUnusedModuleMembers(node) {
-            if (compilerOptions.noUnusedLocals && !ts.isInAmbientContext(node)) {
-                for (var key in node.locals) {
-                    var local = node.locals[key];
-                    if (!local.isReferenced && !local.exportSymbol) {
-                        for (var _i = 0, _a = local.declarations; _i < _a.length; _i++) {
-                            var declaration = _a[_i];
-                            if (!ts.isAmbientModule(declaration)) {
-                                error(declaration.name, ts.Diagnostics._0_is_declared_but_never_used, local.name);
-                            }
-                        }
-                    }
-                }
+        function canHaveConstantValue(node) {
+            switch (node.kind) {
+                case 264 /* EnumMember */:
+                case 179 /* PropertyAccessExpression */:
+                case 180 /* ElementAccessExpression */:
+                    return true;
             }
+            return false;
         }
-        function checkBlock(node) {
-            // Grammar checking for SyntaxKind.Block
-            if (node.kind === 199 /* Block */) {
-                checkGrammarStatementInAmbientContext(node);
+        function getConstantValue(node) {
+            if (node.kind === 264 /* EnumMember */) {
+                return getEnumMemberValue(node);
             }
-            ts.forEach(node.statements, checkSourceElement);
-            if (node.locals) {
-                registerForUnusedIdentifiersCheck(node);
+            var symbol = getNodeLinks(node).resolvedSymbol;
+            if (symbol && (symbol.flags & 8 /* EnumMember */)) {
+                // inline property\index accesses only for const enums
+                if (ts.isConstEnumDeclaration(symbol.valueDeclaration.parent)) {
+                    return getEnumMemberValue(symbol.valueDeclaration);
+                }
             }
+            return undefined;
         }
-        function checkCollisionWithArgumentsInGeneratedCode(node) {
-            // no rest parameters \ declaration context \ overload - no codegen impact
-            if (!ts.hasDeclaredRestParameter(node) || ts.isInAmbientContext(node) || ts.nodeIsMissing(node.body)) {
-                return;
-            }
-            ts.forEach(node.parameters, function (p) {
-                if (p.name && !ts.isBindingPattern(p.name) && p.name.text === argumentsSymbol.name) {
-                    error(p, ts.Diagnostics.Duplicate_identifier_arguments_Compiler_uses_arguments_to_initialize_rest_parameters);
-                }
-            });
+        function isFunctionType(type) {
+            return type.flags & 32768 /* Object */ && getSignaturesOfType(type, 0 /* Call */).length > 0;
         }
-        function needCollisionCheckForIdentifier(node, identifier, name) {
-            if (!(identifier && identifier.text === name)) {
-                return false;
+        function getTypeReferenceSerializationKind(typeName, location) {
+            // Resolve the symbol as a value to ensure the type can be reached at runtime during emit.
+            var valueSymbol = resolveEntityName(typeName, 107455 /* Value */, /*ignoreErrors*/ true, /*dontResolveAlias*/ false, location);
+            // Resolve the symbol as a type so that we can provide a more useful hint for the type serializer.
+            var typeSymbol = resolveEntityName(typeName, 793064 /* Type */, /*ignoreErrors*/ true, /*dontResolveAlias*/ false, location);
+            if (valueSymbol && valueSymbol === typeSymbol) {
+                var globalPromiseSymbol = getGlobalPromiseConstructorSymbol(/*reportErrors*/ false);
+                if (globalPromiseSymbol && valueSymbol === globalPromiseSymbol) {
+                    return ts.TypeReferenceSerializationKind.Promise;
+                }
+                var constructorType = getTypeOfSymbol(valueSymbol);
+                if (constructorType && isConstructorType(constructorType)) {
+                    return ts.TypeReferenceSerializationKind.TypeWithConstructSignatureAndValue;
+                }
             }
-            if (node.kind === 145 /* PropertyDeclaration */ ||
-                node.kind === 144 /* PropertySignature */ ||
-                node.kind === 147 /* MethodDeclaration */ ||
-                node.kind === 146 /* MethodSignature */ ||
-                node.kind === 149 /* GetAccessor */ ||
-                node.kind === 150 /* SetAccessor */) {
-                // it is ok to have member named '_super' or '_this' - member access is always qualified
-                return false;
+            // We might not be able to resolve type symbol so use unknown type in that case (eg error case)
+            if (!typeSymbol) {
+                return ts.TypeReferenceSerializationKind.ObjectType;
             }
-            if (ts.isInAmbientContext(node)) {
-                // ambient context - no codegen impact
-                return false;
+            var type = getDeclaredTypeOfSymbol(typeSymbol);
+            if (type === unknownType) {
+                return ts.TypeReferenceSerializationKind.Unknown;
             }
-            var root = ts.getRootDeclaration(node);
-            if (root.kind === 142 /* Parameter */ && ts.nodeIsMissing(root.parent.body)) {
-                // just an overload - no codegen impact
-                return false;
+            else if (type.flags & 1 /* Any */) {
+                return ts.TypeReferenceSerializationKind.ObjectType;
             }
-            return true;
-        }
-        function checkCollisionWithCapturedThisVariable(node, name) {
-            if (needCollisionCheckForIdentifier(node, name, "_this")) {
-                potentialThisCollisions.push(node);
+            else if (isTypeOfKind(type, 1024 /* Void */ | 6144 /* Nullable */ | 8192 /* Never */)) {
+                return ts.TypeReferenceSerializationKind.VoidNullableOrNeverType;
             }
-        }
-        // this function will run after checking the source file so 'CaptureThis' is correct for all nodes
-        function checkIfThisIsCapturedInEnclosingScope(node) {
-            var current = node;
-            while (current) {
-                if (getNodeCheckFlags(current) & 4 /* CaptureThis */) {
-                    var isDeclaration_1 = node.kind !== 69 /* Identifier */;
-                    if (isDeclaration_1) {
-                        error(node.name, ts.Diagnostics.Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference);
-                    }
-                    else {
-                        error(node, ts.Diagnostics.Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference);
-                    }
-                    return;
-                }
-                current = current.parent;
+            else if (isTypeOfKind(type, 136 /* BooleanLike */)) {
+                return ts.TypeReferenceSerializationKind.BooleanType;
             }
-        }
-        function checkCollisionWithCapturedSuperVariable(node, name) {
-            if (!needCollisionCheckForIdentifier(node, name, "_super")) {
-                return;
+            else if (isTypeOfKind(type, 84 /* NumberLike */)) {
+                return ts.TypeReferenceSerializationKind.NumberLikeType;
             }
-            // bubble up and find containing type
-            var enclosingClass = ts.getContainingClass(node);
-            // if containing type was not found or it is ambient - exit (no codegen)
-            if (!enclosingClass || ts.isInAmbientContext(enclosingClass)) {
-                return;
+            else if (isTypeOfKind(type, 262178 /* StringLike */)) {
+                return ts.TypeReferenceSerializationKind.StringLikeType;
             }
-            if (ts.getClassExtendsHeritageClauseElement(enclosingClass)) {
-                var isDeclaration_2 = node.kind !== 69 /* Identifier */;
-                if (isDeclaration_2) {
-                    error(node, ts.Diagnostics.Duplicate_identifier_super_Compiler_uses_super_to_capture_base_class_reference);
-                }
-                else {
-                    error(node, ts.Diagnostics.Expression_resolves_to_super_that_compiler_uses_to_capture_base_class_reference);
-                }
+            else if (isTupleType(type)) {
+                return ts.TypeReferenceSerializationKind.ArrayLikeType;
             }
-        }
-        function checkCollisionWithRequireExportsInGeneratedCode(node, name) {
-            // No need to check for require or exports for ES6 modules and later
-            if (modulekind >= ts.ModuleKind.ES6) {
-                return;
+            else if (isTypeOfKind(type, 512 /* ESSymbol */)) {
+                return ts.TypeReferenceSerializationKind.ESSymbolType;
             }
-            if (!needCollisionCheckForIdentifier(node, name, "require") && !needCollisionCheckForIdentifier(node, name, "exports")) {
-                return;
+            else if (isFunctionType(type)) {
+                return ts.TypeReferenceSerializationKind.TypeWithCallSignature;
             }
-            // Uninstantiated modules shouldnt do this check
-            if (node.kind === 225 /* ModuleDeclaration */ && ts.getModuleInstanceState(node) !== 1 /* Instantiated */) {
-                return;
+            else if (isArrayType(type)) {
+                return ts.TypeReferenceSerializationKind.ArrayLikeType;
             }
-            // In case of variable declaration, node.parent is variable statement so look at the variable statement's parent
-            var parent = getDeclarationContainer(node);
-            if (parent.kind === 256 /* SourceFile */ && ts.isExternalOrCommonJsModule(parent)) {
-                // If the declaration happens to be in external module, report error that require and exports are reserved keywords
-                error(name, ts.Diagnostics.Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module, ts.declarationNameToString(name), ts.declarationNameToString(name));
+            else {
+                return ts.TypeReferenceSerializationKind.ObjectType;
             }
         }
-        function checkCollisionWithGlobalPromiseInGeneratedCode(node, name) {
-            if (!needCollisionCheckForIdentifier(node, name, "Promise")) {
-                return;
-            }
-            // Uninstantiated modules shouldnt do this check
-            if (node.kind === 225 /* ModuleDeclaration */ && ts.getModuleInstanceState(node) !== 1 /* Instantiated */) {
-                return;
-            }
-            // In case of variable declaration, node.parent is variable statement so look at the variable statement's parent
-            var parent = getDeclarationContainer(node);
-            if (parent.kind === 256 /* SourceFile */ && ts.isExternalOrCommonJsModule(parent) && parent.flags & 8192 /* HasAsyncFunctions */) {
-                // If the declaration happens to be in external module, report error that Promise is a reserved identifier.
-                error(name, ts.Diagnostics.Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_containing_async_functions, ts.declarationNameToString(name), ts.declarationNameToString(name));
+        function writeTypeOfDeclaration(declaration, enclosingDeclaration, flags, writer) {
+            // Get type of the symbol if this is the valid symbol otherwise get type at location
+            var symbol = getSymbolOfNode(declaration);
+            var type = symbol && !(symbol.flags & (2048 /* TypeLiteral */ | 131072 /* Signature */))
+                ? getWidenedLiteralType(getTypeOfSymbol(symbol))
+                : unknownType;
+            if (flags & 8192 /* AddUndefined */) {
+                type = getNullableType(type, 2048 /* Undefined */);
             }
+            getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
         }
-        function checkVarDeclaredNamesNotShadowed(node) {
-            // - ScriptBody : StatementList
-            // It is a Syntax Error if any element of the LexicallyDeclaredNames of StatementList
-            // also occurs in the VarDeclaredNames of StatementList.
-            // - Block : { StatementList }
-            // It is a Syntax Error if any element of the LexicallyDeclaredNames of StatementList
-            // also occurs in the VarDeclaredNames of StatementList.
-            // Variable declarations are hoisted to the top of their function scope. They can shadow
-            // block scoped declarations, which bind tighter. this will not be flagged as duplicate definition
-            // by the binder as the declaration scope is different.
-            // A non-initialized declaration is a no-op as the block declaration will resolve before the var
-            // declaration. the problem is if the declaration has an initializer. this will act as a write to the
-            // block declared value. this is fine for let, but not const.
-            // Only consider declarations with initializers, uninitialized const declarations will not
-            // step on a let/const variable.
-            // Do not consider const and const declarations, as duplicate block-scoped declarations
-            // are handled by the binder.
-            // We are only looking for const declarations that step on let\const declarations from a
-            // different scope. e.g.:
-            //      {
-            //          const x = 0; // localDeclarationSymbol obtained after name resolution will correspond to this declaration
-            //          const x = 0; // symbol for this declaration will be 'symbol'
-            //      }
-            // skip block-scoped variables and parameters
-            if ((ts.getCombinedNodeFlags(node) & 3 /* BlockScoped */) !== 0 || ts.isParameterDeclaration(node)) {
-                return;
+        function writeReturnTypeOfSignatureDeclaration(signatureDeclaration, enclosingDeclaration, flags, writer) {
+            var signature = getSignatureFromDeclaration(signatureDeclaration);
+            getSymbolDisplayBuilder().buildTypeDisplay(getReturnTypeOfSignature(signature), writer, enclosingDeclaration, flags);
+        }
+        function writeTypeOfExpression(expr, enclosingDeclaration, flags, writer) {
+            var type = getWidenedType(getRegularTypeOfExpression(expr));
+            getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
+        }
+        function hasGlobalName(name) {
+            return globals.has(name);
+        }
+        function getReferencedValueSymbol(reference, startInDeclarationContainer) {
+            var resolvedSymbol = getNodeLinks(reference).resolvedSymbol;
+            if (resolvedSymbol) {
+                return resolvedSymbol;
             }
-            // skip variable declarations that don't have initializers
-            // NOTE: in ES6 spec initializer is required in variable declarations where name is binding pattern
-            // so we'll always treat binding elements as initialized
-            if (node.kind === 218 /* VariableDeclaration */ && !node.initializer) {
-                return;
+            var location = reference;
+            if (startInDeclarationContainer) {
+                // When resolving the name of a declaration as a value, we need to start resolution
+                // at a point outside of the declaration.
+                var parent_15 = reference.parent;
+                if (ts.isDeclaration(parent_15) && reference === parent_15.name) {
+                    location = getDeclarationContainer(parent_15);
+                }
             }
-            var symbol = getSymbolOfNode(node);
-            if (symbol.flags & 1 /* FunctionScopedVariable */) {
-                var localDeclarationSymbol = resolveName(node, node.name.text, 3 /* Variable */, /*nodeNotFoundErrorMessage*/ undefined, /*nameArg*/ undefined);
-                if (localDeclarationSymbol &&
-                    localDeclarationSymbol !== symbol &&
-                    localDeclarationSymbol.flags & 2 /* BlockScopedVariable */) {
-                    if (getDeclarationNodeFlagsFromSymbol(localDeclarationSymbol) & 3 /* BlockScoped */) {
-                        var varDeclList = ts.getAncestor(localDeclarationSymbol.valueDeclaration, 219 /* VariableDeclarationList */);
-                        var container = varDeclList.parent.kind === 200 /* VariableStatement */ && varDeclList.parent.parent
-                            ? varDeclList.parent.parent
-                            : undefined;
-                        // names of block-scoped and function scoped variables can collide only
-                        // if block scoped variable is defined in the function\module\source file scope (because of variable hoisting)
-                        var namesShareScope = container &&
-                            (container.kind === 199 /* Block */ && ts.isFunctionLike(container.parent) ||
-                                container.kind === 226 /* ModuleBlock */ ||
-                                container.kind === 225 /* ModuleDeclaration */ ||
-                                container.kind === 256 /* SourceFile */);
-                        // here we know that function scoped variable is shadowed by block scoped one
-                        // if they are defined in the same scope - binder has already reported redeclaration error
-                        // otherwise if variable has an initializer - show error that initialization will fail
-                        // since LHS will be block scoped name instead of function scoped
-                        if (!namesShareScope) {
-                            var name_20 = symbolToString(localDeclarationSymbol);
-                            error(node, ts.Diagnostics.Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1, name_20, name_20);
-                        }
+            return resolveName(location, reference.text, 107455 /* Value */ | 1048576 /* ExportValue */ | 8388608 /* Alias */, /*nodeNotFoundMessage*/ undefined, /*nameArg*/ undefined);
+        }
+        function getReferencedValueDeclaration(reference) {
+            if (!ts.isGeneratedIdentifier(reference)) {
+                reference = ts.getParseTreeNode(reference, ts.isIdentifier);
+                if (reference) {
+                    var symbol = getReferencedValueSymbol(reference);
+                    if (symbol) {
+                        return getExportSymbolOfValueSymbolIfExported(symbol).valueDeclaration;
                     }
                 }
             }
+            return undefined;
         }
-        // Check that a parameter initializer contains no references to parameters declared to the right of itself
-        function checkParameterInitializer(node) {
-            if (ts.getRootDeclaration(node).kind !== 142 /* Parameter */) {
-                return;
+        function isLiteralConstDeclaration(node) {
+            if (ts.isConst(node)) {
+                var type = getTypeOfSymbol(getSymbolOfNode(node));
+                return !!(type.flags & 96 /* StringOrNumberLiteral */ && type.flags & 1048576 /* FreshLiteral */);
             }
-            var func = ts.getContainingFunction(node);
-            visit(node.initializer);
-            function visit(n) {
-                if (ts.isTypeNode(n) || ts.isDeclarationName(n)) {
-                    // do not dive in types
-                    // skip declaration names (i.e. in object literal expressions)
-                    return;
-                }
-                if (n.kind === 172 /* PropertyAccessExpression */) {
-                    // skip property names in property access expression
-                    return visit(n.expression);
-                }
-                else if (n.kind === 69 /* Identifier */) {
-                    // check FunctionLikeDeclaration.locals (stores parameters\function local variable)
-                    // if it contains entry with a specified name
-                    var symbol = resolveName(n, n.text, 107455 /* Value */ | 8388608 /* Alias */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined);
-                    if (!symbol || symbol === unknownSymbol || !symbol.valueDeclaration) {
-                        return;
-                    }
-                    if (symbol.valueDeclaration === node) {
-                        error(n, ts.Diagnostics.Parameter_0_cannot_be_referenced_in_its_initializer, ts.declarationNameToString(node.name));
+            return false;
+        }
+        function writeLiteralConstValue(node, writer) {
+            var type = getTypeOfSymbol(getSymbolOfNode(node));
+            writer.writeStringLiteral(literalTypeToString(type));
+        }
+        function createResolver() {
+            // this variable and functions that use it are deliberately moved here from the outer scope
+            // to avoid scope pollution
+            var resolvedTypeReferenceDirectives = host.getResolvedTypeReferenceDirectives();
+            var fileToDirective;
+            if (resolvedTypeReferenceDirectives) {
+                // populate reverse mapping: file path -> type reference directive that was resolved to this file
+                fileToDirective = ts.createFileMap();
+                resolvedTypeReferenceDirectives.forEach(function (resolvedDirective, key) {
+                    if (!resolvedDirective) {
                         return;
                     }
-                    // locals map for function contain both parameters and function locals
-                    // so we need to do a bit of extra work to check if reference is legal
-                    var enclosingContainer = ts.getEnclosingBlockScopeContainer(symbol.valueDeclaration);
-                    if (enclosingContainer === func) {
-                        if (symbol.valueDeclaration.kind === 142 /* Parameter */) {
-                            // it is ok to reference parameter in initializer if either
-                            // - parameter is located strictly on the left of current parameter declaration
-                            if (symbol.valueDeclaration.pos < node.pos) {
-                                return;
-                            }
-                            // - parameter is wrapped in function-like entity
-                            var current = n;
-                            while (current !== node.initializer) {
-                                if (ts.isFunctionLike(current.parent)) {
-                                    return;
-                                }
-                                // computed property names/initializers in instance property declaration of class like entities
-                                // are executed in constructor and thus deferred
-                                if (current.parent.kind === 145 /* PropertyDeclaration */ &&
-                                    !(ts.hasModifier(current.parent, 32 /* Static */)) &&
-                                    ts.isClassLike(current.parent.parent)) {
-                                    return;
-                                }
-                                current = current.parent;
-                            }
-                        }
-                        error(n, ts.Diagnostics.Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it, ts.declarationNameToString(node.name), ts.declarationNameToString(n));
-                    }
-                }
-                else {
-                    return ts.forEachChild(n, visit);
-                }
+                    var file = host.getSourceFile(resolvedDirective.resolvedFileName);
+                    fileToDirective.set(file.path, key);
+                });
             }
-        }
-        // Check variable, parameter, or property declaration
-        function checkVariableLikeDeclaration(node) {
-            checkDecorators(node);
-            checkSourceElement(node.type);
-            // For a computed property, just check the initializer and exit
-            // Do not use hasDynamicName here, because that returns false for well known symbols.
-            // We want to perform checkComputedPropertyName for all computed properties, including
-            // well known symbols.
-            if (node.name.kind === 140 /* ComputedPropertyName */) {
-                checkComputedPropertyName(node.name);
-                if (node.initializer) {
-                    checkExpressionCached(node.initializer);
+            return {
+                getReferencedExportContainer: getReferencedExportContainer,
+                getReferencedImportDeclaration: getReferencedImportDeclaration,
+                getReferencedDeclarationWithCollidingName: getReferencedDeclarationWithCollidingName,
+                isDeclarationWithCollidingName: isDeclarationWithCollidingName,
+                isValueAliasDeclaration: function (node) {
+                    node = ts.getParseTreeNode(node);
+                    // Synthesized nodes are always treated like values.
+                    return node ? isValueAliasDeclaration(node) : true;
+                },
+                hasGlobalName: hasGlobalName,
+                isReferencedAliasDeclaration: function (node, checkChildren) {
+                    node = ts.getParseTreeNode(node);
+                    // Synthesized nodes are always treated as referenced.
+                    return node ? isReferencedAliasDeclaration(node, checkChildren) : true;
+                },
+                getNodeCheckFlags: function (node) {
+                    node = ts.getParseTreeNode(node);
+                    return node ? getNodeCheckFlags(node) : undefined;
+                },
+                isTopLevelValueImportEqualsWithEntityName: isTopLevelValueImportEqualsWithEntityName,
+                isDeclarationVisible: isDeclarationVisible,
+                isImplementationOfOverload: isImplementationOfOverload,
+                isRequiredInitializedParameter: isRequiredInitializedParameter,
+                isOptionalUninitializedParameterProperty: isOptionalUninitializedParameterProperty,
+                writeTypeOfDeclaration: writeTypeOfDeclaration,
+                writeReturnTypeOfSignatureDeclaration: writeReturnTypeOfSignatureDeclaration,
+                writeTypeOfExpression: writeTypeOfExpression,
+                isSymbolAccessible: isSymbolAccessible,
+                isEntityNameVisible: isEntityNameVisible,
+                getConstantValue: function (node) {
+                    node = ts.getParseTreeNode(node, canHaveConstantValue);
+                    return node ? getConstantValue(node) : undefined;
+                },
+                collectLinkedAliases: collectLinkedAliases,
+                getReferencedValueDeclaration: getReferencedValueDeclaration,
+                getTypeReferenceSerializationKind: getTypeReferenceSerializationKind,
+                isOptionalParameter: isOptionalParameter,
+                moduleExportsSomeValue: moduleExportsSomeValue,
+                isArgumentsLocalBinding: isArgumentsLocalBinding,
+                getExternalModuleFileFromDeclaration: getExternalModuleFileFromDeclaration,
+                getTypeReferenceDirectivesForEntityName: getTypeReferenceDirectivesForEntityName,
+                getTypeReferenceDirectivesForSymbol: getTypeReferenceDirectivesForSymbol,
+                isLiteralConstDeclaration: isLiteralConstDeclaration,
+                writeLiteralConstValue: writeLiteralConstValue,
+                getJsxFactoryEntity: function () { return _jsxFactoryEntity; }
+            };
+            // defined here to avoid outer scope pollution
+            function getTypeReferenceDirectivesForEntityName(node) {
+                // program does not have any files with type reference directives - bail out
+                if (!fileToDirective) {
+                    return undefined;
                 }
+                // property access can only be used as values
+                // qualified names can only be used as types\namespaces
+                // identifiers are treated as values only if they appear in type queries
+                var meaning = (node.kind === 179 /* PropertyAccessExpression */) || (node.kind === 71 /* Identifier */ && isInTypeQuery(node))
+                    ? 107455 /* Value */ | 1048576 /* ExportValue */
+                    : 793064 /* Type */ | 1920 /* Namespace */;
+                var symbol = resolveEntityName(node, meaning, /*ignoreErrors*/ true);
+                return symbol && symbol !== unknownSymbol ? getTypeReferenceDirectivesForSymbol(symbol, meaning) : undefined;
             }
-            if (node.kind === 169 /* BindingElement */) {
-                // check computed properties inside property names of binding elements
-                if (node.propertyName && node.propertyName.kind === 140 /* ComputedPropertyName */) {
-                    checkComputedPropertyName(node.propertyName);
-                }
-                // check private/protected variable access
-                var parent_13 = node.parent.parent;
-                var parentType = getTypeForBindingElementParent(parent_13);
-                var name_21 = node.propertyName || node.name;
-                var property = getPropertyOfType(parentType, getTextOfPropertyName(name_21));
-                if (parent_13.initializer && property && getParentOfSymbol(property)) {
-                    checkClassPropertyAccess(parent_13, parent_13.initializer, parentType, property);
+            // defined here to avoid outer scope pollution
+            function getTypeReferenceDirectivesForSymbol(symbol, meaning) {
+                // program does not have any files with type reference directives - bail out
+                if (!fileToDirective) {
+                    return undefined;
                 }
-            }
-            // For a binding pattern, check contained binding elements
-            if (ts.isBindingPattern(node.name)) {
-                ts.forEach(node.name.elements, checkSourceElement);
-            }
-            // For a parameter declaration with an initializer, error and exit if the containing function doesn't have a body
-            if (node.initializer && ts.getRootDeclaration(node).kind === 142 /* Parameter */ && ts.nodeIsMissing(ts.getContainingFunction(node).body)) {
-                error(node, ts.Diagnostics.A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation);
-                return;
-            }
-            // For a binding pattern, validate the initializer and exit
-            if (ts.isBindingPattern(node.name)) {
-                // Don't validate for-in initializer as it is already an error
-                if (node.initializer && node.parent.parent.kind !== 207 /* ForInStatement */) {
-                    checkTypeAssignableTo(checkExpressionCached(node.initializer), getWidenedTypeForVariableLikeDeclaration(node), node, /*headMessage*/ undefined);
-                    checkParameterInitializer(node);
+                if (!isSymbolFromTypeDeclarationFile(symbol)) {
+                    return undefined;
                 }
-                return;
-            }
-            var symbol = getSymbolOfNode(node);
-            var type = getTypeOfVariableOrParameterOrProperty(symbol);
-            if (node === symbol.valueDeclaration) {
-                // Node is the primary declaration of the symbol, just validate the initializer
-                // Don't validate for-in initializer as it is already an error
-                if (node.initializer && node.parent.parent.kind !== 207 /* ForInStatement */) {
-                    checkTypeAssignableTo(checkExpressionCached(node.initializer), type, node, /*headMessage*/ undefined);
-                    checkParameterInitializer(node);
+                // check what declarations in the symbol can contribute to the target meaning
+                var typeReferenceDirectives;
+                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                    var decl = _a[_i];
+                    // check meaning of the local symbol to see if declaration needs to be analyzed further
+                    if (decl.symbol && decl.symbol.flags & meaning) {
+                        var file = ts.getSourceFileOfNode(decl);
+                        var typeReferenceDirective = fileToDirective.get(file.path);
+                        if (typeReferenceDirective) {
+                            (typeReferenceDirectives || (typeReferenceDirectives = [])).push(typeReferenceDirective);
+                        }
+                        else {
+                            // found at least one entry that does not originate from type reference directive
+                            return undefined;
+                        }
+                    }
                 }
+                return typeReferenceDirectives;
             }
-            else {
-                // Node is a secondary declaration, check that type is identical to primary declaration and check that
-                // initializer is consistent with type associated with the node
-                var declarationType = getWidenedTypeForVariableLikeDeclaration(node);
-                if (type !== unknownType && declarationType !== unknownType && !isTypeIdenticalTo(type, declarationType)) {
-                    error(node.name, ts.Diagnostics.Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_type_2, ts.declarationNameToString(node.name), typeToString(type), typeToString(declarationType));
+            function isSymbolFromTypeDeclarationFile(symbol) {
+                // bail out if symbol does not have associated declarations (i.e. this is transient symbol created for property in binding pattern)
+                if (!symbol.declarations) {
+                    return false;
                 }
-                if (node.initializer) {
-                    checkTypeAssignableTo(checkExpressionCached(node.initializer), declarationType, node, /*headMessage*/ undefined);
+                // walk the parent chain for symbols to make sure that top level parent symbol is in the global scope
+                // external modules cannot define or contribute to type declaration files
+                var current = symbol;
+                while (true) {
+                    var parent_16 = getParentOfSymbol(current);
+                    if (parent_16) {
+                        current = parent_16;
+                    }
+                    else {
+                        break;
+                    }
                 }
-                if (!areDeclarationFlagsIdentical(node, symbol.valueDeclaration)) {
-                    error(symbol.valueDeclaration.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
-                    error(node.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
+                if (current.valueDeclaration && current.valueDeclaration.kind === 265 /* SourceFile */ && current.flags & 512 /* ValueModule */) {
+                    return false;
                 }
-            }
-            if (node.kind !== 145 /* PropertyDeclaration */ && node.kind !== 144 /* PropertySignature */) {
-                // We know we don't have a binding pattern or computed name here
-                checkExportsOnMergedDeclarations(node);
-                if (node.kind === 218 /* VariableDeclaration */ || node.kind === 169 /* BindingElement */) {
-                    checkVarDeclaredNamesNotShadowed(node);
+                // check that at least one declaration of top level symbol originates from type declaration file
+                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                    var decl = _a[_i];
+                    var file = ts.getSourceFileOfNode(decl);
+                    if (fileToDirective.contains(file.path)) {
+                        return true;
+                    }
                 }
-                checkCollisionWithCapturedSuperVariable(node, node.name);
-                checkCollisionWithCapturedThisVariable(node, node.name);
-                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
-                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
-            }
-        }
-        function areDeclarationFlagsIdentical(left, right) {
-            if ((left.kind === 142 /* Parameter */ && right.kind === 218 /* VariableDeclaration */) ||
-                (left.kind === 218 /* VariableDeclaration */ && right.kind === 142 /* Parameter */)) {
-                // Differences in optionality between parameters and variables are allowed.
-                return true;
-            }
-            if (ts.hasQuestionToken(left) !== ts.hasQuestionToken(right)) {
                 return false;
             }
-            var interestingFlags = 8 /* Private */ |
-                16 /* Protected */ |
-                256 /* Async */ |
-                128 /* Abstract */ |
-                64 /* Readonly */ |
-                32 /* Static */;
-            return (ts.getModifierFlags(left) & interestingFlags) === (ts.getModifierFlags(right) & interestingFlags);
-        }
-        function checkVariableDeclaration(node) {
-            checkGrammarVariableDeclaration(node);
-            return checkVariableLikeDeclaration(node);
         }
-        function checkBindingElement(node) {
-            checkGrammarBindingElement(node);
-            return checkVariableLikeDeclaration(node);
-        }
-        function checkVariableStatement(node) {
-            // Grammar checking
-            checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarVariableDeclarationList(node.declarationList) || checkGrammarForDisallowedLetOrConstStatement(node);
-            ts.forEach(node.declarationList.declarations, checkSourceElement);
+        function getExternalModuleFileFromDeclaration(declaration) {
+            var specifier = ts.getExternalModuleName(declaration);
+            var moduleSymbol = resolveExternalModuleNameWorker(specifier, specifier, /*moduleNotFoundError*/ undefined);
+            if (!moduleSymbol) {
+                return undefined;
+            }
+            return ts.getDeclarationOfKind(moduleSymbol, 265 /* SourceFile */);
         }
-        function checkGrammarDisallowedModifiersOnObjectLiteralExpressionMethod(node) {
-            // We only disallow modifier on a method declaration if it is a property of object-literal-expression
-            if (node.modifiers && node.parent.kind === 171 /* ObjectLiteralExpression */) {
-                if (ts.isAsyncFunctionLike(node)) {
-                    if (node.modifiers.length > 1) {
-                        return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
+        function initializeTypeChecker() {
+            // Bind all source files and propagate errors
+            for (var _i = 0, _a = host.getSourceFiles(); _i < _a.length; _i++) {
+                var file = _a[_i];
+                ts.bindSourceFile(file, compilerOptions);
+            }
+            // Initialize global symbol table
+            var augmentations;
+            for (var _b = 0, _c = host.getSourceFiles(); _b < _c.length; _b++) {
+                var file = _c[_b];
+                if (!ts.isExternalOrCommonJsModule(file)) {
+                    mergeSymbolTable(globals, file.locals);
+                }
+                if (file.patternAmbientModules && file.patternAmbientModules.length) {
+                    patternAmbientModules = ts.concatenate(patternAmbientModules, file.patternAmbientModules);
+                }
+                if (file.moduleAugmentations.length) {
+                    (augmentations || (augmentations = [])).push(file.moduleAugmentations);
+                }
+                if (file.symbol && file.symbol.globalExports) {
+                    // Merge in UMD exports with first-in-wins semantics (see #9771)
+                    var source = file.symbol.globalExports;
+                    source.forEach(function (sourceSymbol, id) {
+                        if (!globals.has(id)) {
+                            globals.set(id, sourceSymbol);
+                        }
+                    });
+                }
+            }
+            if (augmentations) {
+                // merge module augmentations.
+                // this needs to be done after global symbol table is initialized to make sure that all ambient modules are indexed
+                for (var _d = 0, augmentations_1 = augmentations; _d < augmentations_1.length; _d++) {
+                    var list = augmentations_1[_d];
+                    for (var _e = 0, list_1 = list; _e < list_1.length; _e++) {
+                        var augmentation = list_1[_e];
+                        mergeModuleAugmentation(augmentation);
                     }
                 }
-                else {
-                    return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
+            }
+            // Setup global builtins
+            addToSymbolTable(globals, builtinGlobals, ts.Diagnostics.Declaration_name_conflicts_with_built_in_global_identifier_0);
+            getSymbolLinks(undefinedSymbol).type = undefinedWideningType;
+            getSymbolLinks(argumentsSymbol).type = getGlobalType("IArguments", /*arity*/ 0, /*reportErrors*/ true);
+            getSymbolLinks(unknownSymbol).type = unknownType;
+            // Initialize special types
+            globalArrayType = getGlobalType("Array", /*arity*/ 1, /*reportErrors*/ true);
+            globalObjectType = getGlobalType("Object", /*arity*/ 0, /*reportErrors*/ true);
+            globalFunctionType = getGlobalType("Function", /*arity*/ 0, /*reportErrors*/ true);
+            globalStringType = getGlobalType("String", /*arity*/ 0, /*reportErrors*/ true);
+            globalNumberType = getGlobalType("Number", /*arity*/ 0, /*reportErrors*/ true);
+            globalBooleanType = getGlobalType("Boolean", /*arity*/ 0, /*reportErrors*/ true);
+            globalRegExpType = getGlobalType("RegExp", /*arity*/ 0, /*reportErrors*/ true);
+            anyArrayType = createArrayType(anyType);
+            autoArrayType = createArrayType(autoType);
+            globalReadonlyArrayType = getGlobalTypeOrUndefined("ReadonlyArray", /*arity*/ 1);
+            anyReadonlyArrayType = globalReadonlyArrayType ? createTypeFromGenericGlobalType(globalReadonlyArrayType, [anyType]) : anyArrayType;
+            globalThisType = getGlobalTypeOrUndefined("ThisType", /*arity*/ 1);
+        }
+        function checkExternalEmitHelpers(location, helpers) {
+            if ((requestedExternalEmitHelpers & helpers) !== helpers && compilerOptions.importHelpers) {
+                var sourceFile = ts.getSourceFileOfNode(location);
+                if (ts.isEffectiveExternalModule(sourceFile, compilerOptions) && !ts.isInAmbientContext(location)) {
+                    var helpersModule = resolveHelpersModule(sourceFile, location);
+                    if (helpersModule !== unknownSymbol) {
+                        var uncheckedHelpers = helpers & ~requestedExternalEmitHelpers;
+                        for (var helper = 1 /* FirstEmitHelper */; helper <= 32768 /* LastEmitHelper */; helper <<= 1) {
+                            if (uncheckedHelpers & helper) {
+                                var name_34 = getHelperName(helper);
+                                var symbol = getSymbol(helpersModule.exports, ts.escapeIdentifier(name_34), 107455 /* Value */);
+                                if (!symbol) {
+                                    error(location, ts.Diagnostics.This_syntax_requires_an_imported_helper_named_1_but_module_0_has_no_exported_member_1, ts.externalHelpersModuleNameText, name_34);
+                                }
+                            }
+                        }
+                    }
+                    requestedExternalEmitHelpers |= helpers;
                 }
             }
         }
-        function checkExpressionStatement(node) {
-            // Grammar checking
-            checkGrammarStatementInAmbientContext(node);
-            checkExpression(node.expression);
-        }
-        function checkIfStatement(node) {
-            // Grammar checking
-            checkGrammarStatementInAmbientContext(node);
-            checkExpression(node.expression);
-            checkSourceElement(node.thenStatement);
-            if (node.thenStatement.kind === 201 /* EmptyStatement */) {
-                error(node.thenStatement, ts.Diagnostics.The_body_of_an_if_statement_cannot_be_the_empty_statement);
+        function getHelperName(helper) {
+            switch (helper) {
+                case 1 /* Extends */: return "__extends";
+                case 2 /* Assign */: return "__assign";
+                case 4 /* Rest */: return "__rest";
+                case 8 /* Decorate */: return "__decorate";
+                case 16 /* Metadata */: return "__metadata";
+                case 32 /* Param */: return "__param";
+                case 64 /* Awaiter */: return "__awaiter";
+                case 128 /* Generator */: return "__generator";
+                case 256 /* Values */: return "__values";
+                case 512 /* Read */: return "__read";
+                case 1024 /* Spread */: return "__spread";
+                case 2048 /* Await */: return "__await";
+                case 4096 /* AsyncGenerator */: return "__asyncGenerator";
+                case 8192 /* AsyncDelegator */: return "__asyncDelegator";
+                case 16384 /* AsyncValues */: return "__asyncValues";
+                case 32768 /* ExportStar */: return "__exportStar";
+                default: ts.Debug.fail("Unrecognized helper");
             }
-            checkSourceElement(node.elseStatement);
-        }
-        function checkDoStatement(node) {
-            // Grammar checking
-            checkGrammarStatementInAmbientContext(node);
-            checkSourceElement(node.statement);
-            checkExpression(node.expression);
         }
-        function checkWhileStatement(node) {
-            // Grammar checking
-            checkGrammarStatementInAmbientContext(node);
-            checkExpression(node.expression);
-            checkSourceElement(node.statement);
+        function resolveHelpersModule(node, errorNode) {
+            if (!externalHelpersModule) {
+                externalHelpersModule = resolveExternalModule(node, ts.externalHelpersModuleNameText, ts.Diagnostics.This_syntax_requires_an_imported_helper_but_module_0_cannot_be_found, errorNode) || unknownSymbol;
+            }
+            return externalHelpersModule;
         }
-        function checkForStatement(node) {
-            // Grammar checking
-            if (!checkGrammarStatementInAmbientContext(node)) {
-                if (node.initializer && node.initializer.kind === 219 /* VariableDeclarationList */) {
-                    checkGrammarVariableDeclarationList(node.initializer);
-                }
+        // GRAMMAR CHECKING
+        function checkGrammarDecorators(node) {
+            if (!node.decorators) {
+                return false;
             }
-            if (node.initializer) {
-                if (node.initializer.kind === 219 /* VariableDeclarationList */) {
-                    ts.forEach(node.initializer.declarations, checkVariableDeclaration);
+            if (!ts.nodeCanBeDecorated(node)) {
+                if (node.kind === 151 /* MethodDeclaration */ && !ts.nodeIsPresent(node.body)) {
+                    return grammarErrorOnFirstToken(node, ts.Diagnostics.A_decorator_can_only_decorate_a_method_implementation_not_an_overload);
                 }
                 else {
-                    checkExpression(node.initializer);
+                    return grammarErrorOnFirstToken(node, ts.Diagnostics.Decorators_are_not_valid_here);
                 }
             }
-            if (node.condition)
-                checkExpression(node.condition);
-            if (node.incrementor)
-                checkExpression(node.incrementor);
-            checkSourceElement(node.statement);
-            if (node.locals) {
-                registerForUnusedIdentifiersCheck(node);
+            else if (node.kind === 153 /* GetAccessor */ || node.kind === 154 /* SetAccessor */) {
+                var accessors = ts.getAllAccessorDeclarations(node.parent.members, node);
+                if (accessors.firstAccessor.decorators && node === accessors.secondAccessor) {
+                    return grammarErrorOnFirstToken(node, ts.Diagnostics.Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name);
+                }
             }
+            return false;
         }
-        function checkForOfStatement(node) {
-            checkGrammarForInOrForOfStatement(node);
-            // Check the LHS and RHS
-            // If the LHS is a declaration, just check it as a variable declaration, which will in turn check the RHS
-            // via checkRightHandSideOfForOf.
-            // If the LHS is an expression, check the LHS, as a destructuring assignment or as a reference.
-            // Then check that the RHS is assignable to it.
-            if (node.initializer.kind === 219 /* VariableDeclarationList */) {
-                checkForInOrForOfVariableDeclaration(node);
+        function checkGrammarModifiers(node) {
+            var quickResult = reportObviousModifierErrors(node);
+            if (quickResult !== undefined) {
+                return quickResult;
             }
-            else {
-                var varExpr = node.initializer;
-                var iteratedType = checkRightHandSideOfForOf(node.expression);
-                // There may be a destructuring assignment on the left side
-                if (varExpr.kind === 170 /* ArrayLiteralExpression */ || varExpr.kind === 171 /* ObjectLiteralExpression */) {
-                    // iteratedType may be undefined. In this case, we still want to check the structure of
-                    // varExpr, in particular making sure it's a valid LeftHandSideExpression. But we'd like
-                    // to short circuit the type relation checking as much as possible, so we pass the unknownType.
-                    checkDestructuringAssignment(varExpr, iteratedType || unknownType);
-                }
-                else {
-                    var leftType = checkExpression(varExpr);
-                    checkReferenceExpression(varExpr, /*invalidReferenceMessage*/ ts.Diagnostics.Invalid_left_hand_side_in_for_of_statement, 
-                    /*constantVariableMessage*/ ts.Diagnostics.The_left_hand_side_of_a_for_of_statement_cannot_be_a_constant_or_a_read_only_property);
-                    // iteratedType will be undefined if the rightType was missing properties/signatures
-                    // required to get its iteratedType (like [Symbol.iterator] or next). This may be
-                    // because we accessed properties from anyType, or it may have led to an error inside
-                    // getElementTypeOfIterable.
-                    if (iteratedType) {
-                        checkTypeAssignableTo(iteratedType, leftType, varExpr, /*headMessage*/ undefined);
+            var lastStatic, lastPrivate, lastProtected, lastDeclare, lastAsync, lastReadonly;
+            var flags = 0 /* None */;
+            for (var _i = 0, _a = node.modifiers; _i < _a.length; _i++) {
+                var modifier = _a[_i];
+                if (modifier.kind !== 131 /* ReadonlyKeyword */) {
+                    if (node.kind === 148 /* PropertySignature */ || node.kind === 150 /* MethodSignature */) {
+                        return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_type_member, ts.tokenToString(modifier.kind));
+                    }
+                    if (node.kind === 157 /* IndexSignature */) {
+                        return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_an_index_signature, ts.tokenToString(modifier.kind));
                     }
                 }
-            }
-            checkSourceElement(node.statement);
-            if (node.locals) {
-                registerForUnusedIdentifiersCheck(node);
-            }
-        }
-        function checkForInStatement(node) {
-            // Grammar checking
-            checkGrammarForInOrForOfStatement(node);
-            // TypeScript 1.0 spec  (April 2014): 5.4
-            // In a 'for-in' statement of the form
-            // for (let VarDecl in Expr) Statement
-            //   VarDecl must be a variable declaration without a type annotation that declares a variable of type Any,
-            //   and Expr must be an expression of type Any, an object type, or a type parameter type.
-            if (node.initializer.kind === 219 /* VariableDeclarationList */) {
-                var variable = node.initializer.declarations[0];
-                if (variable && ts.isBindingPattern(variable.name)) {
-                    error(variable.name, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern);
+                switch (modifier.kind) {
+                    case 76 /* ConstKeyword */:
+                        if (node.kind !== 232 /* EnumDeclaration */ && node.parent.kind === 229 /* ClassDeclaration */) {
+                            return grammarErrorOnNode(node, ts.Diagnostics.A_class_member_cannot_have_the_0_keyword, ts.tokenToString(76 /* ConstKeyword */));
+                        }
+                        break;
+                    case 114 /* PublicKeyword */:
+                    case 113 /* ProtectedKeyword */:
+                    case 112 /* PrivateKeyword */:
+                        var text = visibilityToString(ts.modifierToFlag(modifier.kind));
+                        if (modifier.kind === 113 /* ProtectedKeyword */) {
+                            lastProtected = modifier;
+                        }
+                        else if (modifier.kind === 112 /* PrivateKeyword */) {
+                            lastPrivate = modifier;
+                        }
+                        if (flags & 28 /* AccessibilityModifier */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics.Accessibility_modifier_already_seen);
+                        }
+                        else if (flags & 32 /* Static */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "static");
+                        }
+                        else if (flags & 64 /* Readonly */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "readonly");
+                        }
+                        else if (flags & 256 /* Async */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "async");
+                        }
+                        else if (node.parent.kind === 234 /* ModuleBlock */ || node.parent.kind === 265 /* SourceFile */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_module_or_namespace_element, text);
+                        }
+                        else if (flags & 128 /* Abstract */) {
+                            if (modifier.kind === 112 /* PrivateKeyword */) {
+                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, text, "abstract");
+                            }
+                            else {
+                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "abstract");
+                            }
+                        }
+                        flags |= ts.modifierToFlag(modifier.kind);
+                        break;
+                    case 115 /* StaticKeyword */:
+                        if (flags & 32 /* Static */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "static");
+                        }
+                        else if (flags & 64 /* Readonly */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "static", "readonly");
+                        }
+                        else if (flags & 256 /* Async */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "static", "async");
+                        }
+                        else if (node.parent.kind === 234 /* ModuleBlock */ || node.parent.kind === 265 /* SourceFile */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_module_or_namespace_element, "static");
+                        }
+                        else if (node.kind === 146 /* Parameter */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "static");
+                        }
+                        else if (flags & 128 /* Abstract */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, "static", "abstract");
+                        }
+                        flags |= 32 /* Static */;
+                        lastStatic = modifier;
+                        break;
+                    case 131 /* ReadonlyKeyword */:
+                        if (flags & 64 /* Readonly */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "readonly");
+                        }
+                        else if (node.kind !== 149 /* PropertyDeclaration */ && node.kind !== 148 /* PropertySignature */ && node.kind !== 157 /* IndexSignature */ && node.kind !== 146 /* Parameter */) {
+                            // If node.kind === SyntaxKind.Parameter, checkParameter report an error if it's not a parameter property.
+                            return grammarErrorOnNode(modifier, ts.Diagnostics.readonly_modifier_can_only_appear_on_a_property_declaration_or_index_signature);
+                        }
+                        flags |= 64 /* Readonly */;
+                        lastReadonly = modifier;
+                        break;
+                    case 84 /* ExportKeyword */:
+                        if (flags & 1 /* Export */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "export");
+                        }
+                        else if (flags & 2 /* Ambient */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "export", "declare");
+                        }
+                        else if (flags & 128 /* Abstract */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "export", "abstract");
+                        }
+                        else if (flags & 256 /* Async */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "export", "async");
+                        }
+                        else if (node.parent.kind === 229 /* ClassDeclaration */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_class_element, "export");
+                        }
+                        else if (node.kind === 146 /* Parameter */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "export");
+                        }
+                        flags |= 1 /* Export */;
+                        break;
+                    case 124 /* DeclareKeyword */:
+                        if (flags & 2 /* Ambient */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "declare");
+                        }
+                        else if (flags & 256 /* Async */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_in_an_ambient_context, "async");
+                        }
+                        else if (node.parent.kind === 229 /* ClassDeclaration */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_class_element, "declare");
+                        }
+                        else if (node.kind === 146 /* Parameter */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "declare");
+                        }
+                        else if (ts.isInAmbientContext(node.parent) && node.parent.kind === 234 /* ModuleBlock */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics.A_declare_modifier_cannot_be_used_in_an_already_ambient_context);
+                        }
+                        flags |= 2 /* Ambient */;
+                        lastDeclare = modifier;
+                        break;
+                    case 117 /* AbstractKeyword */:
+                        if (flags & 128 /* Abstract */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "abstract");
+                        }
+                        if (node.kind !== 229 /* ClassDeclaration */) {
+                            if (node.kind !== 151 /* MethodDeclaration */ &&
+                                node.kind !== 149 /* PropertyDeclaration */ &&
+                                node.kind !== 153 /* GetAccessor */ &&
+                                node.kind !== 154 /* SetAccessor */) {
+                                return grammarErrorOnNode(modifier, ts.Diagnostics.abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration);
+                            }
+                            if (!(node.parent.kind === 229 /* ClassDeclaration */ && ts.getModifierFlags(node.parent) & 128 /* Abstract */)) {
+                                return grammarErrorOnNode(modifier, ts.Diagnostics.Abstract_methods_can_only_appear_within_an_abstract_class);
+                            }
+                            if (flags & 32 /* Static */) {
+                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, "static", "abstract");
+                            }
+                            if (flags & 8 /* Private */) {
+                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, "private", "abstract");
+                            }
+                        }
+                        flags |= 128 /* Abstract */;
+                        break;
+                    case 120 /* AsyncKeyword */:
+                        if (flags & 256 /* Async */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "async");
+                        }
+                        else if (flags & 2 /* Ambient */ || ts.isInAmbientContext(node.parent)) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_in_an_ambient_context, "async");
+                        }
+                        else if (node.kind === 146 /* Parameter */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "async");
+                        }
+                        flags |= 256 /* Async */;
+                        lastAsync = modifier;
+                        break;
                 }
-                checkForInOrForOfVariableDeclaration(node);
             }
-            else {
-                // In a 'for-in' statement of the form
-                // for (Var in Expr) Statement
-                //   Var must be an expression classified as a reference of type Any or the String primitive type,
-                //   and Expr must be an expression of type Any, an object type, or a type parameter type.
-                var varExpr = node.initializer;
-                var leftType = checkExpression(varExpr);
-                if (varExpr.kind === 170 /* ArrayLiteralExpression */ || varExpr.kind === 171 /* ObjectLiteralExpression */) {
-                    error(varExpr, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern);
+            if (node.kind === 152 /* Constructor */) {
+                if (flags & 32 /* Static */) {
+                    return grammarErrorOnNode(lastStatic, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "static");
                 }
-                else if (!isTypeAnyOrAllConstituentTypesHaveKind(leftType, 34 /* StringLike */)) {
-                    error(varExpr, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any);
+                if (flags & 128 /* Abstract */) {
+                    return grammarErrorOnNode(lastStatic, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "abstract");
                 }
-                else {
-                    // run check only former check succeeded to avoid cascading errors
-                    checkReferenceExpression(varExpr, ts.Diagnostics.Invalid_left_hand_side_in_for_in_statement, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_be_a_constant_or_a_read_only_property);
+                else if (flags & 256 /* Async */) {
+                    return grammarErrorOnNode(lastAsync, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "async");
                 }
+                else if (flags & 64 /* Readonly */) {
+                    return grammarErrorOnNode(lastReadonly, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "readonly");
+                }
+                return;
             }
-            var rightType = checkNonNullExpression(node.expression);
-            // unknownType is returned i.e. if node.expression is identifier whose name cannot be resolved
-            // in this case error about missing name is already reported - do not report extra one
-            if (!isTypeAnyOrAllConstituentTypesHaveKind(rightType, 2588672 /* ObjectType */ | 16384 /* TypeParameter */)) {
-                error(node.expression, ts.Diagnostics.The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter);
-            }
-            checkSourceElement(node.statement);
-            if (node.locals) {
-                registerForUnusedIdentifiersCheck(node);
-            }
-        }
-        function checkForInOrForOfVariableDeclaration(iterationStatement) {
-            var variableDeclarationList = iterationStatement.initializer;
-            // checkGrammarForInOrForOfStatement will check that there is exactly one declaration.
-            if (variableDeclarationList.declarations.length >= 1) {
-                var decl = variableDeclarationList.declarations[0];
-                checkVariableDeclaration(decl);
-            }
-        }
-        function checkRightHandSideOfForOf(rhsExpression) {
-            var expressionType = checkNonNullExpression(rhsExpression);
-            return checkIteratedTypeOrElementType(expressionType, rhsExpression, /*allowStringInput*/ true);
-        }
-        function checkIteratedTypeOrElementType(inputType, errorNode, allowStringInput) {
-            if (isTypeAny(inputType)) {
-                return inputType;
-            }
-            if (languageVersion >= 2 /* ES6 */) {
-                return checkElementTypeOfIterable(inputType, errorNode);
+            else if ((node.kind === 238 /* ImportDeclaration */ || node.kind === 237 /* ImportEqualsDeclaration */) && flags & 2 /* Ambient */) {
+                return grammarErrorOnNode(lastDeclare, ts.Diagnostics.A_0_modifier_cannot_be_used_with_an_import_declaration, "declare");
             }
-            if (allowStringInput) {
-                return checkElementTypeOfArrayOrString(inputType, errorNode);
+            else if (node.kind === 146 /* Parameter */ && (flags & 92 /* ParameterPropertyModifier */) && ts.isBindingPattern(node.name)) {
+                return grammarErrorOnNode(node, ts.Diagnostics.A_parameter_property_may_not_be_declared_using_a_binding_pattern);
             }
-            if (isArrayLikeType(inputType)) {
-                var indexType = getIndexTypeOfType(inputType, 1 /* Number */);
-                if (indexType) {
-                    return indexType;
-                }
+            else if (node.kind === 146 /* Parameter */ && (flags & 92 /* ParameterPropertyModifier */) && node.dotDotDotToken) {
+                return grammarErrorOnNode(node, ts.Diagnostics.A_parameter_property_cannot_be_declared_using_a_rest_parameter);
             }
-            if (errorNode) {
-                error(errorNode, ts.Diagnostics.Type_0_is_not_an_array_type, typeToString(inputType));
+            if (flags & 256 /* Async */) {
+                return checkGrammarAsyncModifier(node, lastAsync);
             }
-            return unknownType;
         }
         /**
-         * When errorNode is undefined, it means we should not report any errors.
+         * true | false: Early return this value from checkGrammarModifiers.
+         * undefined: Need to do full checking on the modifiers.
          */
-        function checkElementTypeOfIterable(iterable, errorNode) {
-            var elementType = getElementTypeOfIterable(iterable, errorNode);
-            // Now even though we have extracted the iteratedType, we will have to validate that the type
-            // passed in is actually an Iterable.
-            if (errorNode && elementType) {
-                checkTypeAssignableTo(iterable, createIterableType(elementType), errorNode);
-            }
-            return elementType || anyType;
+        function reportObviousModifierErrors(node) {
+            return !node.modifiers
+                ? false
+                : shouldReportBadModifier(node)
+                    ? grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here)
+                    : undefined;
         }
-        /**
-         * We want to treat type as an iterable, and get the type it is an iterable of. The iterable
-         * must have the following structure (annotated with the names of the variables below):
-         *
-         * { // iterable
-         *     [Symbol.iterator]: { // iteratorFunction
-         *         (): Iterator<T>
-         *     }
-         * }
-         *
-         * T is the type we are after. At every level that involves analyzing return types
-         * of signatures, we union the return types of all the signatures.
-         *
-         * Another thing to note is that at any step of this process, we could run into a dead end,
-         * meaning either the property is missing, or we run into the anyType. If either of these things
-         * happens, we return undefined to signal that we could not find the iterated type. If a property
-         * is missing, and the previous step did not result in 'any', then we also give an error if the
-         * caller requested it. Then the caller can decide what to do in the case where there is no iterated
-         * type. This is different from returning anyType, because that would signify that we have matched the
-         * whole pattern and that T (above) is 'any'.
-         */
-        function getElementTypeOfIterable(type, errorNode) {
-            if (isTypeAny(type)) {
-                return undefined;
-            }
-            var typeAsIterable = type;
-            if (!typeAsIterable.iterableElementType) {
-                // As an optimization, if the type is instantiated directly using the globalIterableType (Iterable<number>),
-                // then just grab its type argument.
-                if ((type.flags & 131072 /* Reference */) && type.target === getGlobalIterableType()) {
-                    typeAsIterable.iterableElementType = type.typeArguments[0];
-                }
-                else {
-                    var iteratorFunction = getTypeOfPropertyOfType(type, ts.getPropertyNameForKnownSymbolName("iterator"));
-                    if (isTypeAny(iteratorFunction)) {
-                        return undefined;
+        function shouldReportBadModifier(node) {
+            switch (node.kind) {
+                case 153 /* GetAccessor */:
+                case 154 /* SetAccessor */:
+                case 152 /* Constructor */:
+                case 149 /* PropertyDeclaration */:
+                case 148 /* PropertySignature */:
+                case 151 /* MethodDeclaration */:
+                case 150 /* MethodSignature */:
+                case 157 /* IndexSignature */:
+                case 233 /* ModuleDeclaration */:
+                case 238 /* ImportDeclaration */:
+                case 237 /* ImportEqualsDeclaration */:
+                case 244 /* ExportDeclaration */:
+                case 243 /* ExportAssignment */:
+                case 186 /* FunctionExpression */:
+                case 187 /* ArrowFunction */:
+                case 146 /* Parameter */:
+                    return false;
+                default:
+                    if (node.parent.kind === 234 /* ModuleBlock */ || node.parent.kind === 265 /* SourceFile */) {
+                        return false;
                     }
-                    var iteratorFunctionSignatures = iteratorFunction ? getSignaturesOfType(iteratorFunction, 0 /* Call */) : emptyArray;
-                    if (iteratorFunctionSignatures.length === 0) {
-                        if (errorNode) {
-                            error(errorNode, ts.Diagnostics.Type_must_have_a_Symbol_iterator_method_that_returns_an_iterator);
-                        }
-                        return undefined;
+                    switch (node.kind) {
+                        case 228 /* FunctionDeclaration */:
+                            return nodeHasAnyModifiersExcept(node, 120 /* AsyncKeyword */);
+                        case 229 /* ClassDeclaration */:
+                            return nodeHasAnyModifiersExcept(node, 117 /* AbstractKeyword */);
+                        case 230 /* InterfaceDeclaration */:
+                        case 208 /* VariableStatement */:
+                        case 231 /* TypeAliasDeclaration */:
+                            return true;
+                        case 232 /* EnumDeclaration */:
+                            return nodeHasAnyModifiersExcept(node, 76 /* ConstKeyword */);
+                        default:
+                            ts.Debug.fail();
+                            return false;
                     }
-                    typeAsIterable.iterableElementType = getElementTypeOfIterator(getUnionType(ts.map(iteratorFunctionSignatures, getReturnTypeOfSignature), /*subtypeReduction*/ true), errorNode);
-                }
             }
-            return typeAsIterable.iterableElementType;
         }
-        /**
-         * This function has very similar logic as getElementTypeOfIterable, except that it operates on
-         * Iterators instead of Iterables. Here is the structure:
-         *
-         *  { // iterator
-         *      next: { // iteratorNextFunction
-         *          (): { // iteratorNextResult
-         *              value: T // iteratorNextValue
-         *          }
-         *      }
-         *  }
-         *
-         */
-        function getElementTypeOfIterator(type, errorNode) {
-            if (isTypeAny(type)) {
-                return undefined;
+        function nodeHasAnyModifiersExcept(node, allowedModifier) {
+            return node.modifiers.length > 1 || node.modifiers[0].kind !== allowedModifier;
+        }
+        function checkGrammarAsyncModifier(node, asyncModifier) {
+            switch (node.kind) {
+                case 151 /* MethodDeclaration */:
+                case 228 /* FunctionDeclaration */:
+                case 186 /* FunctionExpression */:
+                case 187 /* ArrowFunction */:
+                    return false;
             }
-            var typeAsIterator = type;
-            if (!typeAsIterator.iteratorElementType) {
-                // As an optimization, if the type is instantiated directly using the globalIteratorType (Iterator<number>),
-                // then just grab its type argument.
-                if ((type.flags & 131072 /* Reference */) && type.target === getGlobalIteratorType()) {
-                    typeAsIterator.iteratorElementType = type.typeArguments[0];
-                }
-                else {
-                    var iteratorNextFunction = getTypeOfPropertyOfType(type, "next");
-                    if (isTypeAny(iteratorNextFunction)) {
-                        return undefined;
+            return grammarErrorOnNode(asyncModifier, ts.Diagnostics._0_modifier_cannot_be_used_here, "async");
+        }
+        function checkGrammarForDisallowedTrailingComma(list) {
+            if (list && list.hasTrailingComma) {
+                var start = list.end - ",".length;
+                var end = list.end;
+                var sourceFile = ts.getSourceFileOfNode(list[0]);
+                return grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.Trailing_comma_not_allowed);
+            }
+        }
+        function checkGrammarTypeParameterList(typeParameters, file) {
+            if (checkGrammarForDisallowedTrailingComma(typeParameters)) {
+                return true;
+            }
+            if (typeParameters && typeParameters.length === 0) {
+                var start = typeParameters.pos - "<".length;
+                var end = ts.skipTrivia(file.text, typeParameters.end) + ">".length;
+                return grammarErrorAtPos(file, start, end - start, ts.Diagnostics.Type_parameter_list_cannot_be_empty);
+            }
+        }
+        function checkGrammarParameterList(parameters) {
+            var seenOptionalParameter = false;
+            var parameterCount = parameters.length;
+            for (var i = 0; i < parameterCount; i++) {
+                var parameter = parameters[i];
+                if (parameter.dotDotDotToken) {
+                    if (i !== (parameterCount - 1)) {
+                        return grammarErrorOnNode(parameter.dotDotDotToken, ts.Diagnostics.A_rest_parameter_must_be_last_in_a_parameter_list);
                     }
-                    var iteratorNextFunctionSignatures = iteratorNextFunction ? getSignaturesOfType(iteratorNextFunction, 0 /* Call */) : emptyArray;
-                    if (iteratorNextFunctionSignatures.length === 0) {
-                        if (errorNode) {
-                            error(errorNode, ts.Diagnostics.An_iterator_must_have_a_next_method);
-                        }
-                        return undefined;
+                    if (ts.isBindingPattern(parameter.name)) {
+                        return grammarErrorOnNode(parameter.name, ts.Diagnostics.A_rest_element_cannot_contain_a_binding_pattern);
                     }
-                    var iteratorNextResult = getUnionType(ts.map(iteratorNextFunctionSignatures, getReturnTypeOfSignature), /*subtypeReduction*/ true);
-                    if (isTypeAny(iteratorNextResult)) {
-                        return undefined;
+                    if (parameter.questionToken) {
+                        return grammarErrorOnNode(parameter.questionToken, ts.Diagnostics.A_rest_parameter_cannot_be_optional);
                     }
-                    var iteratorNextValue = getTypeOfPropertyOfType(iteratorNextResult, "value");
-                    if (!iteratorNextValue) {
-                        if (errorNode) {
-                            error(errorNode, ts.Diagnostics.The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property);
-                        }
-                        return undefined;
+                    if (parameter.initializer) {
+                        return grammarErrorOnNode(parameter.name, ts.Diagnostics.A_rest_parameter_cannot_have_an_initializer);
                     }
-                    typeAsIterator.iteratorElementType = iteratorNextValue;
+                }
+                else if (parameter.questionToken) {
+                    seenOptionalParameter = true;
+                    if (parameter.initializer) {
+                        return grammarErrorOnNode(parameter.name, ts.Diagnostics.Parameter_cannot_have_question_mark_and_initializer);
+                    }
+                }
+                else if (seenOptionalParameter && !parameter.initializer) {
+                    return grammarErrorOnNode(parameter.name, ts.Diagnostics.A_required_parameter_cannot_follow_an_optional_parameter);
                 }
             }
-            return typeAsIterator.iteratorElementType;
         }
-        function getElementTypeOfIterableIterator(type) {
-            if (isTypeAny(type)) {
-                return undefined;
-            }
-            // As an optimization, if the type is instantiated directly using the globalIterableIteratorType (IterableIterator<number>),
-            // then just grab its type argument.
-            if ((type.flags & 131072 /* Reference */) && type.target === getGlobalIterableIteratorType()) {
-                return type.typeArguments[0];
-            }
-            return getElementTypeOfIterable(type, /*errorNode*/ undefined) ||
-                getElementTypeOfIterator(type, /*errorNode*/ undefined);
+        function checkGrammarFunctionLikeDeclaration(node) {
+            // Prevent cascading error by short-circuit
+            var file = ts.getSourceFileOfNode(node);
+            return checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarTypeParameterList(node.typeParameters, file) ||
+                checkGrammarParameterList(node.parameters) || checkGrammarArrowFunction(node, file);
         }
-        /**
-         * This function does the following steps:
-         *   1. Break up arrayOrStringType (possibly a union) into its string constituents and array constituents.
-         *   2. Take the element types of the array constituents.
-         *   3. Return the union of the element types, and string if there was a string constituent.
-         *
-         * For example:
-         *     string -> string
-         *     number[] -> number
-         *     string[] | number[] -> string | number
-         *     string | number[] -> string | number
-         *     string | string[] | number[] -> string | number
-         *
-         * It also errors if:
-         *   1. Some constituent is neither a string nor an array.
-         *   2. Some constituent is a string and target is less than ES5 (because in ES3 string is not indexable).
-         */
-        function checkElementTypeOfArrayOrString(arrayOrStringType, errorNode) {
-            ts.Debug.assert(languageVersion < 2 /* ES6 */);
-            // After we remove all types that are StringLike, we will know if there was a string constituent
-            // based on whether the remaining type is the same as the initial type.
-            var arrayType = arrayOrStringType;
-            if (arrayOrStringType.flags & 524288 /* Union */) {
-                arrayType = getUnionType(ts.filter(arrayOrStringType.types, function (t) { return !(t.flags & 34 /* StringLike */); }), /*subtypeReduction*/ true);
-            }
-            else if (arrayOrStringType.flags & 34 /* StringLike */) {
-                arrayType = neverType;
-            }
-            var hasStringConstituent = arrayOrStringType !== arrayType;
-            var reportedError = false;
-            if (hasStringConstituent) {
-                if (languageVersion < 1 /* ES5 */) {
-                    error(errorNode, ts.Diagnostics.Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher);
-                    reportedError = true;
-                }
-                // Now that we've removed all the StringLike types, if no constituents remain, then the entire
-                // arrayOrStringType was a string.
-                if (arrayType.flags & 8192 /* Never */) {
-                    return stringType;
+        function checkGrammarClassLikeDeclaration(node) {
+            var file = ts.getSourceFileOfNode(node);
+            return checkGrammarClassDeclarationHeritageClauses(node) || checkGrammarTypeParameterList(node.typeParameters, file);
+        }
+        function checkGrammarArrowFunction(node, file) {
+            if (node.kind === 187 /* ArrowFunction */) {
+                var arrowFunction = node;
+                var startLine = ts.getLineAndCharacterOfPosition(file, arrowFunction.equalsGreaterThanToken.pos).line;
+                var endLine = ts.getLineAndCharacterOfPosition(file, arrowFunction.equalsGreaterThanToken.end).line;
+                if (startLine !== endLine) {
+                    return grammarErrorOnNode(arrowFunction.equalsGreaterThanToken, ts.Diagnostics.Line_terminator_not_permitted_before_arrow);
                 }
             }
-            if (!isArrayLikeType(arrayType)) {
-                if (!reportedError) {
-                    // Which error we report depends on whether there was a string constituent. For example,
-                    // if the input type is number | string, we want to say that number is not an array type.
-                    // But if the input was just number, we want to say that number is not an array type
-                    // or a string type.
-                    var diagnostic = hasStringConstituent
-                        ? ts.Diagnostics.Type_0_is_not_an_array_type
-                        : ts.Diagnostics.Type_0_is_not_an_array_type_or_a_string_type;
-                    error(errorNode, diagnostic, typeToString(arrayType));
+            return false;
+        }
+        function checkGrammarIndexSignatureParameters(node) {
+            var parameter = node.parameters[0];
+            if (node.parameters.length !== 1) {
+                if (parameter) {
+                    return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_must_have_exactly_one_parameter);
                 }
-                return hasStringConstituent ? stringType : unknownType;
-            }
-            var arrayElementType = getIndexTypeOfType(arrayType, 1 /* Number */) || unknownType;
-            if (hasStringConstituent) {
-                // This is just an optimization for the case where arrayOrStringType is string | string[]
-                if (arrayElementType.flags & 34 /* StringLike */) {
-                    return stringType;
+                else {
+                    return grammarErrorOnNode(node, ts.Diagnostics.An_index_signature_must_have_exactly_one_parameter);
                 }
-                return getUnionType([arrayElementType, stringType], /*subtypeReduction*/ true);
             }
-            return arrayElementType;
-        }
-        function checkBreakOrContinueStatement(node) {
-            // Grammar checking
-            checkGrammarStatementInAmbientContext(node) || checkGrammarBreakOrContinueStatement(node);
-            // TODO: Check that target label is valid
-        }
-        function isGetAccessorWithAnnotatedSetAccessor(node) {
-            return !!(node.kind === 149 /* GetAccessor */ && ts.getSetAccessorTypeAnnotationNode(ts.getDeclarationOfKind(node.symbol, 150 /* SetAccessor */)));
+            if (parameter.dotDotDotToken) {
+                return grammarErrorOnNode(parameter.dotDotDotToken, ts.Diagnostics.An_index_signature_cannot_have_a_rest_parameter);
+            }
+            if (ts.getModifierFlags(parameter) !== 0) {
+                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_cannot_have_an_accessibility_modifier);
+            }
+            if (parameter.questionToken) {
+                return grammarErrorOnNode(parameter.questionToken, ts.Diagnostics.An_index_signature_parameter_cannot_have_a_question_mark);
+            }
+            if (parameter.initializer) {
+                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_cannot_have_an_initializer);
+            }
+            if (!parameter.type) {
+                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_must_have_a_type_annotation);
+            }
+            if (parameter.type.kind !== 136 /* StringKeyword */ && parameter.type.kind !== 133 /* NumberKeyword */) {
+                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_type_must_be_string_or_number);
+            }
+            if (!node.type) {
+                return grammarErrorOnNode(node, ts.Diagnostics.An_index_signature_must_have_a_type_annotation);
+            }
         }
-        function isUnwrappedReturnTypeVoidOrAny(func, returnType) {
-            var unwrappedReturnType = ts.isAsyncFunctionLike(func) ? getPromisedType(returnType) : returnType;
-            return unwrappedReturnType && maybeTypeOfKind(unwrappedReturnType, 1024 /* Void */ | 1 /* Any */);
+        function checkGrammarIndexSignature(node) {
+            // Prevent cascading error by short-circuit
+            return checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarIndexSignatureParameters(node);
         }
-        function checkReturnStatement(node) {
-            // Grammar checking
-            if (!checkGrammarStatementInAmbientContext(node)) {
-                var functionBlock = ts.getContainingFunction(node);
-                if (!functionBlock) {
-                    grammarErrorOnFirstToken(node, ts.Diagnostics.A_return_statement_can_only_be_used_within_a_function_body);
-                }
+        function checkGrammarForAtLeastOneTypeArgument(node, typeArguments) {
+            if (typeArguments && typeArguments.length === 0) {
+                var sourceFile = ts.getSourceFileOfNode(node);
+                var start = typeArguments.pos - "<".length;
+                var end = ts.skipTrivia(sourceFile.text, typeArguments.end) + ">".length;
+                return grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.Type_argument_list_cannot_be_empty);
             }
-            var func = ts.getContainingFunction(node);
-            if (func) {
-                var signature = getSignatureFromDeclaration(func);
-                var returnType = getReturnTypeOfSignature(signature);
-                if (strictNullChecks || node.expression || returnType.flags & 8192 /* Never */) {
-                    var exprType = node.expression ? checkExpressionCached(node.expression) : undefinedType;
-                    if (func.asteriskToken) {
-                        // A generator does not need its return expressions checked against its return type.
-                        // Instead, the yield expressions are checked against the element type.
-                        // TODO: Check return expressions of generators when return type tracking is added
-                        // for generators.
-                        return;
-                    }
-                    if (func.kind === 150 /* SetAccessor */) {
-                        if (node.expression) {
-                            error(node.expression, ts.Diagnostics.Setters_cannot_return_a_value);
-                        }
-                    }
-                    else if (func.kind === 148 /* Constructor */) {
-                        if (node.expression && !checkTypeAssignableTo(exprType, returnType, node.expression)) {
-                            error(node.expression, ts.Diagnostics.Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class);
-                        }
-                    }
-                    else if (func.type || isGetAccessorWithAnnotatedSetAccessor(func)) {
-                        if (ts.isAsyncFunctionLike(func)) {
-                            var promisedType = getPromisedType(returnType);
-                            var awaitedType = checkAwaitedType(exprType, node.expression || node, ts.Diagnostics.Return_expression_in_async_function_does_not_have_a_valid_callable_then_member);
-                            if (promisedType) {
-                                // If the function has a return type, but promisedType is
-                                // undefined, an error will be reported in checkAsyncFunctionReturnType
-                                // so we don't need to report one here.
-                                checkTypeAssignableTo(awaitedType, promisedType, node.expression || node);
-                            }
-                        }
-                        else {
-                            checkTypeAssignableTo(exprType, returnType, node.expression || node);
-                        }
+        }
+        function checkGrammarTypeArguments(node, typeArguments) {
+            return checkGrammarForDisallowedTrailingComma(typeArguments) ||
+                checkGrammarForAtLeastOneTypeArgument(node, typeArguments);
+        }
+        function checkGrammarForOmittedArgument(node, args) {
+            if (args) {
+                var sourceFile = ts.getSourceFileOfNode(node);
+                for (var _i = 0, args_4 = args; _i < args_4.length; _i++) {
+                    var arg = args_4[_i];
+                    if (arg.kind === 200 /* OmittedExpression */) {
+                        return grammarErrorAtPos(sourceFile, arg.pos, 0, ts.Diagnostics.Argument_expression_expected);
                     }
                 }
-                else if (func.kind !== 148 /* Constructor */ && compilerOptions.noImplicitReturns && !isUnwrappedReturnTypeVoidOrAny(func, returnType)) {
-                    // The function has a return type, but the return statement doesn't have an expression.
-                    error(node, ts.Diagnostics.Not_all_code_paths_return_a_value);
-                }
             }
         }
-        function checkWithStatement(node) {
-            // Grammar checking for withStatement
-            if (!checkGrammarStatementInAmbientContext(node)) {
-                if (node.flags & 262144 /* AwaitContext */) {
-                    grammarErrorOnFirstToken(node, ts.Diagnostics.with_statements_are_not_allowed_in_an_async_function_block);
-                }
+        function checkGrammarArguments(node, args) {
+            return checkGrammarForOmittedArgument(node, args);
+        }
+        function checkGrammarHeritageClause(node) {
+            var types = node.types;
+            if (checkGrammarForDisallowedTrailingComma(types)) {
+                return true;
             }
-            checkExpression(node.expression);
-            var sourceFile = ts.getSourceFileOfNode(node);
-            if (!hasParseDiagnostics(sourceFile)) {
-                var start = ts.getSpanOfTokenAtPosition(sourceFile, node.pos).start;
-                var end = node.statement.pos;
-                grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.The_with_statement_is_not_supported_All_symbols_in_a_with_block_will_have_type_any);
+            if (types && types.length === 0) {
+                var listType = ts.tokenToString(node.token);
+                var sourceFile = ts.getSourceFileOfNode(node);
+                return grammarErrorAtPos(sourceFile, types.pos, 0, ts.Diagnostics._0_list_cannot_be_empty, listType);
             }
+            return ts.forEach(types, checkGrammarExpressionWithTypeArguments);
         }
-        function checkSwitchStatement(node) {
-            // Grammar checking
-            checkGrammarStatementInAmbientContext(node);
-            var firstDefaultClause;
-            var hasDuplicateDefaultClause = false;
-            var expressionType = checkExpression(node.expression);
-            ts.forEach(node.caseBlock.clauses, function (clause) {
-                // Grammar check for duplicate default clauses, skip if we already report duplicate default clause
-                if (clause.kind === 250 /* DefaultClause */ && !hasDuplicateDefaultClause) {
-                    if (firstDefaultClause === undefined) {
-                        firstDefaultClause = clause;
+        function checkGrammarExpressionWithTypeArguments(node) {
+            return checkGrammarTypeArguments(node, node.typeArguments);
+        }
+        function checkGrammarClassDeclarationHeritageClauses(node) {
+            var seenExtendsClause = false;
+            var seenImplementsClause = false;
+            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && node.heritageClauses) {
+                for (var _i = 0, _a = node.heritageClauses; _i < _a.length; _i++) {
+                    var heritageClause = _a[_i];
+                    if (heritageClause.token === 85 /* ExtendsKeyword */) {
+                        if (seenExtendsClause) {
+                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.extends_clause_already_seen);
+                        }
+                        if (seenImplementsClause) {
+                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.extends_clause_must_precede_implements_clause);
+                        }
+                        if (heritageClause.types.length > 1) {
+                            return grammarErrorOnFirstToken(heritageClause.types[1], ts.Diagnostics.Classes_can_only_extend_a_single_class);
+                        }
+                        seenExtendsClause = true;
                     }
                     else {
-                        var sourceFile = ts.getSourceFileOfNode(node);
-                        var start = ts.skipTrivia(sourceFile.text, clause.pos);
-                        var end = clause.statements.length > 0 ? clause.statements[0].pos : clause.end;
-                        grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.A_default_clause_cannot_appear_more_than_once_in_a_switch_statement);
-                        hasDuplicateDefaultClause = true;
-                    }
-                }
-                if (produceDiagnostics && clause.kind === 249 /* CaseClause */) {
-                    var caseClause = clause;
-                    // TypeScript 1.0 spec (April 2014): 5.9
-                    // In a 'switch' statement, each 'case' expression must be of a type that is comparable
-                    // to or from the type of the 'switch' expression.
-                    var caseType = checkExpression(caseClause.expression);
-                    if (!isTypeEqualityComparableTo(expressionType, caseType)) {
-                        // expressionType is not comparable to caseType, try the reversed check and report errors if it fails
-                        checkTypeComparableTo(caseType, expressionType, caseClause.expression, /*headMessage*/ undefined);
+                        ts.Debug.assert(heritageClause.token === 108 /* ImplementsKeyword */);
+                        if (seenImplementsClause) {
+                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.implements_clause_already_seen);
+                        }
+                        seenImplementsClause = true;
                     }
+                    // Grammar checking heritageClause inside class declaration
+                    checkGrammarHeritageClause(heritageClause);
                 }
-                ts.forEach(clause.statements, checkSourceElement);
-            });
-            if (node.caseBlock.locals) {
-                registerForUnusedIdentifiersCheck(node.caseBlock);
             }
         }
-        function checkLabeledStatement(node) {
-            // Grammar checking
-            if (!checkGrammarStatementInAmbientContext(node)) {
-                var current = node.parent;
-                while (current) {
-                    if (ts.isFunctionLike(current)) {
-                        break;
+        function checkGrammarInterfaceDeclaration(node) {
+            var seenExtendsClause = false;
+            if (node.heritageClauses) {
+                for (var _i = 0, _a = node.heritageClauses; _i < _a.length; _i++) {
+                    var heritageClause = _a[_i];
+                    if (heritageClause.token === 85 /* ExtendsKeyword */) {
+                        if (seenExtendsClause) {
+                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.extends_clause_already_seen);
+                        }
+                        seenExtendsClause = true;
                     }
-                    if (current.kind === 214 /* LabeledStatement */ && current.label.text === node.label.text) {
-                        var sourceFile = ts.getSourceFileOfNode(node);
-                        grammarErrorOnNode(node.label, ts.Diagnostics.Duplicate_label_0, ts.getTextOfNodeFromSourceText(sourceFile.text, node.label));
-                        break;
+                    else {
+                        ts.Debug.assert(heritageClause.token === 108 /* ImplementsKeyword */);
+                        return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.Interface_declaration_cannot_have_implements_clause);
                     }
-                    current = current.parent;
+                    // Grammar checking heritageClause inside class declaration
+                    checkGrammarHeritageClause(heritageClause);
                 }
             }
-            // ensure that label is unique
-            checkSourceElement(node.statement);
+            return false;
         }
-        function checkThrowStatement(node) {
-            // Grammar checking
-            if (!checkGrammarStatementInAmbientContext(node)) {
-                if (node.expression === undefined) {
-                    grammarErrorAfterFirstToken(node, ts.Diagnostics.Line_break_not_permitted_here);
-                }
+        function checkGrammarComputedPropertyName(node) {
+            // If node is not a computedPropertyName, just skip the grammar checking
+            if (node.kind !== 144 /* ComputedPropertyName */) {
+                return false;
             }
-            if (node.expression) {
-                checkExpression(node.expression);
+            var computedPropertyName = node;
+            if (computedPropertyName.expression.kind === 194 /* BinaryExpression */ && computedPropertyName.expression.operatorToken.kind === 26 /* CommaToken */) {
+                return grammarErrorOnNode(computedPropertyName.expression, ts.Diagnostics.A_comma_expression_is_not_allowed_in_a_computed_property_name);
             }
         }
-        function checkTryStatement(node) {
-            // Grammar checking
-            checkGrammarStatementInAmbientContext(node);
-            checkBlock(node.tryBlock);
-            var catchClause = node.catchClause;
-            if (catchClause) {
-                // Grammar checking
-                if (catchClause.variableDeclaration) {
-                    if (catchClause.variableDeclaration.name.kind !== 69 /* Identifier */) {
-                        grammarErrorOnFirstToken(catchClause.variableDeclaration.name, ts.Diagnostics.Catch_clause_variable_name_must_be_an_identifier);
-                    }
-                    else if (catchClause.variableDeclaration.type) {
-                        grammarErrorOnFirstToken(catchClause.variableDeclaration.type, ts.Diagnostics.Catch_clause_variable_cannot_have_a_type_annotation);
-                    }
-                    else if (catchClause.variableDeclaration.initializer) {
-                        grammarErrorOnFirstToken(catchClause.variableDeclaration.initializer, ts.Diagnostics.Catch_clause_variable_cannot_have_an_initializer);
-                    }
-                    else {
-                        var identifierName = catchClause.variableDeclaration.name.text;
-                        var locals = catchClause.block.locals;
-                        if (locals) {
-                            var localSymbol = locals[identifierName];
-                            if (localSymbol && (localSymbol.flags & 2 /* BlockScopedVariable */) !== 0) {
-                                grammarErrorOnNode(localSymbol.valueDeclaration, ts.Diagnostics.Cannot_redeclare_identifier_0_in_catch_clause, identifierName);
-                            }
-                        }
-                    }
+        function checkGrammarForGenerator(node) {
+            if (node.asteriskToken) {
+                ts.Debug.assert(node.kind === 228 /* FunctionDeclaration */ ||
+                    node.kind === 186 /* FunctionExpression */ ||
+                    node.kind === 151 /* MethodDeclaration */);
+                if (ts.isInAmbientContext(node)) {
+                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.Generators_are_not_allowed_in_an_ambient_context);
+                }
+                if (!node.body) {
+                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.An_overload_signature_cannot_be_declared_as_a_generator);
                 }
-                checkBlock(catchClause.block);
             }
-            if (node.finallyBlock) {
-                checkBlock(node.finallyBlock);
+        }
+        function checkGrammarForInvalidQuestionMark(questionToken, message) {
+            if (questionToken) {
+                return grammarErrorOnNode(questionToken, message);
             }
         }
-        function checkIndexConstraints(type) {
-            var declaredNumberIndexer = getIndexDeclarationOfSymbol(type.symbol, 1 /* Number */);
-            var declaredStringIndexer = getIndexDeclarationOfSymbol(type.symbol, 0 /* String */);
-            var stringIndexType = getIndexTypeOfType(type, 0 /* String */);
-            var numberIndexType = getIndexTypeOfType(type, 1 /* Number */);
-            if (stringIndexType || numberIndexType) {
-                ts.forEach(getPropertiesOfObjectType(type), function (prop) {
-                    var propType = getTypeOfSymbol(prop);
-                    checkIndexConstraintForProperty(prop, propType, type, declaredStringIndexer, stringIndexType, 0 /* String */);
-                    checkIndexConstraintForProperty(prop, propType, type, declaredNumberIndexer, numberIndexType, 1 /* Number */);
-                });
-                if (type.flags & 32768 /* Class */ && ts.isClassLike(type.symbol.valueDeclaration)) {
-                    var classDeclaration = type.symbol.valueDeclaration;
-                    for (var _i = 0, _a = classDeclaration.members; _i < _a.length; _i++) {
-                        var member = _a[_i];
-                        // Only process instance properties with computed names here.
-                        // Static properties cannot be in conflict with indexers,
-                        // and properties with literal names were already checked.
-                        if (!(ts.getModifierFlags(member) & 32 /* Static */) && ts.hasDynamicName(member)) {
-                            var propType = getTypeOfSymbol(member.symbol);
-                            checkIndexConstraintForProperty(member.symbol, propType, type, declaredStringIndexer, stringIndexType, 0 /* String */);
-                            checkIndexConstraintForProperty(member.symbol, propType, type, declaredNumberIndexer, numberIndexType, 1 /* Number */);
+        function checkGrammarObjectLiteralExpression(node, inDestructuring) {
+            var seen = ts.createMap();
+            var Property = 1;
+            var GetAccessor = 2;
+            var SetAccessor = 4;
+            var GetOrSetAccessor = GetAccessor | SetAccessor;
+            for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
+                var prop = _a[_i];
+                if (prop.kind === 263 /* SpreadAssignment */) {
+                    continue;
+                }
+                var name_35 = prop.name;
+                if (name_35.kind === 144 /* ComputedPropertyName */) {
+                    // If the name is not a ComputedPropertyName, the grammar checking will skip it
+                    checkGrammarComputedPropertyName(name_35);
+                }
+                if (prop.kind === 262 /* ShorthandPropertyAssignment */ && !inDestructuring && prop.objectAssignmentInitializer) {
+                    // having objectAssignmentInitializer is only valid in ObjectAssignmentPattern
+                    // outside of destructuring it is a syntax error
+                    return grammarErrorOnNode(prop.equalsToken, ts.Diagnostics.can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment);
+                }
+                // Modifiers are never allowed on properties except for 'async' on a method declaration
+                if (prop.modifiers) {
+                    for (var _b = 0, _c = prop.modifiers; _b < _c.length; _b++) {
+                        var mod = _c[_b];
+                        if (mod.kind !== 120 /* AsyncKeyword */ || prop.kind !== 151 /* MethodDeclaration */) {
+                            grammarErrorOnNode(mod, ts.Diagnostics._0_modifier_cannot_be_used_here, ts.getTextOfNode(mod));
                         }
                     }
                 }
-            }
-            var errorNode;
-            if (stringIndexType && numberIndexType) {
-                errorNode = declaredNumberIndexer || declaredStringIndexer;
-                // condition 'errorNode === undefined' may appear if types does not declare nor string neither number indexer
-                if (!errorNode && (type.flags & 65536 /* Interface */)) {
-                    var someBaseTypeHasBothIndexers = ts.forEach(getBaseTypes(type), function (base) { return getIndexTypeOfType(base, 0 /* String */) && getIndexTypeOfType(base, 1 /* Number */); });
-                    errorNode = someBaseTypeHasBothIndexers ? undefined : type.symbol.declarations[0];
+                // ECMA-262 11.1.5 Object Initializer
+                // If previous is not undefined then throw a SyntaxError exception if any of the following conditions are true
+                // a.This production is contained in strict code and IsDataDescriptor(previous) is true and
+                // IsDataDescriptor(propId.descriptor) is true.
+                //    b.IsDataDescriptor(previous) is true and IsAccessorDescriptor(propId.descriptor) is true.
+                //    c.IsAccessorDescriptor(previous) is true and IsDataDescriptor(propId.descriptor) is true.
+                //    d.IsAccessorDescriptor(previous) is true and IsAccessorDescriptor(propId.descriptor) is true
+                // and either both previous and propId.descriptor have[[Get]] fields or both previous and propId.descriptor have[[Set]] fields
+                var currentKind = void 0;
+                if (prop.kind === 261 /* PropertyAssignment */ || prop.kind === 262 /* ShorthandPropertyAssignment */) {
+                    // Grammar checking for computedPropertyName and shorthandPropertyAssignment
+                    checkGrammarForInvalidQuestionMark(prop.questionToken, ts.Diagnostics.An_object_member_cannot_be_declared_optional);
+                    if (name_35.kind === 8 /* NumericLiteral */) {
+                        checkGrammarNumericLiteral(name_35);
+                    }
+                    currentKind = Property;
                 }
-            }
-            if (errorNode && !isTypeAssignableTo(numberIndexType, stringIndexType)) {
-                error(errorNode, ts.Diagnostics.Numeric_index_type_0_is_not_assignable_to_string_index_type_1, typeToString(numberIndexType), typeToString(stringIndexType));
-            }
-            function checkIndexConstraintForProperty(prop, propertyType, containingType, indexDeclaration, indexType, indexKind) {
-                if (!indexType) {
-                    return;
+                else if (prop.kind === 151 /* MethodDeclaration */) {
+                    currentKind = Property;
                 }
-                // index is numeric and property name is not valid numeric literal
-                if (indexKind === 1 /* Number */ && !isNumericName(prop.valueDeclaration.name)) {
-                    return;
+                else if (prop.kind === 153 /* GetAccessor */) {
+                    currentKind = GetAccessor;
                 }
-                // perform property check if property or indexer is declared in 'type'
-                // this allows to rule out cases when both property and indexer are inherited from the base class
-                var errorNode;
-                if (prop.valueDeclaration.name.kind === 140 /* ComputedPropertyName */ || prop.parent === containingType.symbol) {
-                    errorNode = prop.valueDeclaration;
+                else if (prop.kind === 154 /* SetAccessor */) {
+                    currentKind = SetAccessor;
                 }
-                else if (indexDeclaration) {
-                    errorNode = indexDeclaration;
+                else {
+                    ts.Debug.fail("Unexpected syntax kind:" + prop.kind);
                 }
-                else if (containingType.flags & 65536 /* Interface */) {
-                    // for interfaces property and indexer might be inherited from different bases
-                    // check if any base class already has both property and indexer.
-                    // check should be performed only if 'type' is the first type that brings property\indexer together
-                    var someBaseClassHasBothPropertyAndIndexer = ts.forEach(getBaseTypes(containingType), function (base) { return getPropertyOfObjectType(base, prop.name) && getIndexTypeOfType(base, indexKind); });
-                    errorNode = someBaseClassHasBothPropertyAndIndexer ? undefined : containingType.symbol.declarations[0];
+                var effectiveName = ts.getPropertyNameForPropertyNameNode(name_35);
+                if (effectiveName === undefined) {
+                    continue;
                 }
-                if (errorNode && !isTypeAssignableTo(propertyType, indexType)) {
-                    var errorMessage = indexKind === 0 /* String */
-                        ? ts.Diagnostics.Property_0_of_type_1_is_not_assignable_to_string_index_type_2
-                        : ts.Diagnostics.Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2;
-                    error(errorNode, errorMessage, symbolToString(prop), typeToString(propertyType), typeToString(indexType));
+                var existingKind = seen.get(effectiveName);
+                if (!existingKind) {
+                    seen.set(effectiveName, currentKind);
                 }
-            }
-        }
-        function checkTypeNameIsReserved(name, message) {
-            // TS 1.0 spec (April 2014): 3.6.1
-            // The predefined type keywords are reserved and cannot be used as names of user defined types.
-            switch (name.text) {
-                case "any":
-                case "number":
-                case "boolean":
-                case "string":
-                case "symbol":
-                case "void":
-                    error(name, message, name.text);
-            }
-        }
-        /** Check each type parameter and check that type parameters have no duplicate type parameter declarations */
-        function checkTypeParameters(typeParameterDeclarations) {
-            if (typeParameterDeclarations) {
-                for (var i = 0, n = typeParameterDeclarations.length; i < n; i++) {
-                    var node = typeParameterDeclarations[i];
-                    checkTypeParameter(node);
-                    if (produceDiagnostics) {
-                        for (var j = 0; j < i; j++) {
-                            if (typeParameterDeclarations[j].symbol === node.symbol) {
-                                error(node.name, ts.Diagnostics.Duplicate_identifier_0, ts.declarationNameToString(node.name));
-                            }
+                else {
+                    if (currentKind === Property && existingKind === Property) {
+                        grammarErrorOnNode(name_35, ts.Diagnostics.Duplicate_identifier_0, ts.getTextOfNode(name_35));
+                    }
+                    else if ((currentKind & GetOrSetAccessor) && (existingKind & GetOrSetAccessor)) {
+                        if (existingKind !== GetOrSetAccessor && currentKind !== existingKind) {
+                            seen.set(effectiveName, currentKind | existingKind);
                         }
+                        else {
+                            return grammarErrorOnNode(name_35, ts.Diagnostics.An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name);
+                        }
+                    }
+                    else {
+                        return grammarErrorOnNode(name_35, ts.Diagnostics.An_object_literal_cannot_have_property_and_accessor_with_the_same_name);
                     }
                 }
             }
         }
-        /** Check that type parameter lists are identical across multiple declarations */
-        function checkTypeParameterListsIdentical(node, symbol) {
-            if (symbol.declarations.length === 1) {
-                return;
-            }
-            var firstDecl;
-            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                var declaration = _a[_i];
-                if (declaration.kind === 221 /* ClassDeclaration */ || declaration.kind === 222 /* InterfaceDeclaration */) {
-                    if (!firstDecl) {
-                        firstDecl = declaration;
-                    }
-                    else if (!areTypeParametersIdentical(firstDecl.typeParameters, node.typeParameters)) {
-                        error(node.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_type_parameters, node.name.text);
-                    }
+        function checkGrammarJsxElement(node) {
+            var seen = ts.createMap();
+            for (var _i = 0, _a = node.attributes.properties; _i < _a.length; _i++) {
+                var attr = _a[_i];
+                if (attr.kind === 255 /* JsxSpreadAttribute */) {
+                    continue;
+                }
+                var jsxAttr = attr;
+                var name_36 = jsxAttr.name;
+                if (!seen.get(name_36.text)) {
+                    seen.set(name_36.text, true);
+                }
+                else {
+                    return grammarErrorOnNode(name_36, ts.Diagnostics.JSX_elements_cannot_have_multiple_attributes_with_the_same_name);
+                }
+                var initializer = jsxAttr.initializer;
+                if (initializer && initializer.kind === 256 /* JsxExpression */ && !initializer.expression) {
+                    return grammarErrorOnNode(jsxAttr.initializer, ts.Diagnostics.JSX_attributes_must_only_be_assigned_a_non_empty_expression);
                 }
             }
         }
-        function checkClassExpression(node) {
-            checkClassLikeDeclaration(node);
-            checkNodeDeferred(node);
-            return getTypeOfSymbol(getSymbolOfNode(node));
-        }
-        function checkClassExpressionDeferred(node) {
-            ts.forEach(node.members, checkSourceElement);
-            registerForUnusedIdentifiersCheck(node);
-        }
-        function checkClassDeclaration(node) {
-            if (!node.name && !(ts.getModifierFlags(node) & 512 /* Default */)) {
-                grammarErrorOnFirstToken(node, ts.Diagnostics.A_class_declaration_without_the_default_modifier_must_have_a_name);
+        function checkGrammarForInOrForOfStatement(forInOrOfStatement) {
+            if (checkGrammarStatementInAmbientContext(forInOrOfStatement)) {
+                return true;
             }
-            checkClassLikeDeclaration(node);
-            ts.forEach(node.members, checkSourceElement);
-            registerForUnusedIdentifiersCheck(node);
-        }
-        function checkClassLikeDeclaration(node) {
-            checkGrammarClassDeclarationHeritageClauses(node);
-            checkDecorators(node);
-            if (node.name) {
-                checkTypeNameIsReserved(node.name, ts.Diagnostics.Class_name_cannot_be_0);
-                checkCollisionWithCapturedThisVariable(node, node.name);
-                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
-                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
+            if (forInOrOfStatement.kind === 216 /* ForOfStatement */ && forInOrOfStatement.awaitModifier) {
+                if ((forInOrOfStatement.flags & 16384 /* AwaitContext */) === 0 /* None */) {
+                    return grammarErrorOnNode(forInOrOfStatement.awaitModifier, ts.Diagnostics.A_for_await_of_statement_is_only_allowed_within_an_async_function_or_async_generator);
+                }
             }
-            checkTypeParameters(node.typeParameters);
-            checkExportsOnMergedDeclarations(node);
-            var symbol = getSymbolOfNode(node);
-            var type = getDeclaredTypeOfSymbol(symbol);
-            var typeWithThis = getTypeWithThisArgument(type);
-            var staticType = getTypeOfSymbol(symbol);
-            checkTypeParameterListsIdentical(node, symbol);
-            checkClassForDuplicateDeclarations(node);
-            var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
-            if (baseTypeNode) {
-                var baseTypes = getBaseTypes(type);
-                if (baseTypes.length && produceDiagnostics) {
-                    var baseType_1 = baseTypes[0];
-                    var staticBaseType = getBaseConstructorTypeOfClass(type);
-                    checkBaseTypeAccessibility(staticBaseType, baseTypeNode);
-                    checkSourceElement(baseTypeNode.expression);
-                    if (baseTypeNode.typeArguments) {
-                        ts.forEach(baseTypeNode.typeArguments, checkSourceElement);
-                        for (var _i = 0, _a = getConstructorsForTypeArguments(staticBaseType, baseTypeNode.typeArguments); _i < _a.length; _i++) {
-                            var constructor = _a[_i];
-                            if (!checkTypeArgumentConstraints(constructor.typeParameters, baseTypeNode.typeArguments)) {
-                                break;
-                            }
-                        }
-                    }
-                    checkTypeAssignableTo(typeWithThis, getTypeWithThisArgument(baseType_1, type.thisType), node.name || node, ts.Diagnostics.Class_0_incorrectly_extends_base_class_1);
-                    checkTypeAssignableTo(staticType, getTypeWithoutSignatures(staticBaseType), node.name || node, ts.Diagnostics.Class_static_side_0_incorrectly_extends_base_class_static_side_1);
-                    if (baseType_1.symbol.valueDeclaration && !ts.isInAmbientContext(baseType_1.symbol.valueDeclaration)) {
-                        if (!isBlockScopedNameDeclaredBeforeUse(baseType_1.symbol.valueDeclaration, node)) {
-                            error(baseTypeNode, ts.Diagnostics.A_class_must_be_declared_after_its_base_class);
-                        }
+            if (forInOrOfStatement.initializer.kind === 227 /* VariableDeclarationList */) {
+                var variableList = forInOrOfStatement.initializer;
+                if (!checkGrammarVariableDeclarationList(variableList)) {
+                    var declarations = variableList.declarations;
+                    // declarations.length can be zero if there is an error in variable declaration in for-of or for-in
+                    // See http://www.ecma-international.org/ecma-262/6.0/#sec-for-in-and-for-of-statements for details
+                    // For example:
+                    //      var let = 10;
+                    //      for (let of [1,2,3]) {} // this is invalid ES6 syntax
+                    //      for (let in [1,2,3]) {} // this is invalid ES6 syntax
+                    // We will then want to skip on grammar checking on variableList declaration
+                    if (!declarations.length) {
+                        return false;
                     }
-                    if (!(staticBaseType.symbol && staticBaseType.symbol.flags & 32 /* Class */)) {
-                        // When the static base type is a "class-like" constructor function (but not actually a class), we verify
-                        // that all instantiated base constructor signatures return the same type. We can simply compare the type
-                        // references (as opposed to checking the structure of the types) because elsewhere we have already checked
-                        // that the base type is a class or interface type (and not, for example, an anonymous object type).
-                        var constructors = getInstantiatedConstructorsForTypeArguments(staticBaseType, baseTypeNode.typeArguments);
-                        if (ts.forEach(constructors, function (sig) { return getReturnTypeOfSignature(sig) !== baseType_1; })) {
-                            error(baseTypeNode.expression, ts.Diagnostics.Base_constructors_must_all_have_the_same_return_type);
-                        }
+                    if (declarations.length > 1) {
+                        var diagnostic = forInOrOfStatement.kind === 215 /* ForInStatement */
+                            ? ts.Diagnostics.Only_a_single_variable_declaration_is_allowed_in_a_for_in_statement
+                            : ts.Diagnostics.Only_a_single_variable_declaration_is_allowed_in_a_for_of_statement;
+                        return grammarErrorOnFirstToken(variableList.declarations[1], diagnostic);
                     }
-                    checkKindsOfPropertyMemberOverrides(type, baseType_1);
-                }
-            }
-            var implementedTypeNodes = ts.getClassImplementsHeritageClauseElements(node);
-            if (implementedTypeNodes) {
-                for (var _b = 0, implementedTypeNodes_1 = implementedTypeNodes; _b < implementedTypeNodes_1.length; _b++) {
-                    var typeRefNode = implementedTypeNodes_1[_b];
-                    if (!ts.isEntityNameExpression(typeRefNode.expression)) {
-                        error(typeRefNode.expression, ts.Diagnostics.A_class_can_only_implement_an_identifier_Slashqualified_name_with_optional_type_arguments);
+                    var firstDeclaration = declarations[0];
+                    if (firstDeclaration.initializer) {
+                        var diagnostic = forInOrOfStatement.kind === 215 /* ForInStatement */
+                            ? ts.Diagnostics.The_variable_declaration_of_a_for_in_statement_cannot_have_an_initializer
+                            : ts.Diagnostics.The_variable_declaration_of_a_for_of_statement_cannot_have_an_initializer;
+                        return grammarErrorOnNode(firstDeclaration.name, diagnostic);
                     }
-                    checkTypeReferenceNode(typeRefNode);
-                    if (produceDiagnostics) {
-                        var t = getTypeFromTypeNode(typeRefNode);
-                        if (t !== unknownType) {
-                            var declaredType = (t.flags & 131072 /* Reference */) ? t.target : t;
-                            if (declaredType.flags & (32768 /* Class */ | 65536 /* Interface */)) {
-                                checkTypeAssignableTo(typeWithThis, getTypeWithThisArgument(t, type.thisType), node.name || node, ts.Diagnostics.Class_0_incorrectly_implements_interface_1);
-                            }
-                            else {
-                                error(typeRefNode, ts.Diagnostics.A_class_may_only_implement_another_class_or_interface);
-                            }
-                        }
+                    if (firstDeclaration.type) {
+                        var diagnostic = forInOrOfStatement.kind === 215 /* ForInStatement */
+                            ? ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation
+                            : ts.Diagnostics.The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation;
+                        return grammarErrorOnNode(firstDeclaration, diagnostic);
                     }
                 }
             }
-            if (produceDiagnostics) {
-                checkIndexConstraints(type);
-                checkTypeForDuplicateIndexSignatures(node);
-            }
+            return false;
         }
-        function checkBaseTypeAccessibility(type, node) {
-            var signatures = getSignaturesOfType(type, 1 /* Construct */);
-            if (signatures.length) {
-                var declaration = signatures[0].declaration;
-                if (declaration && ts.getModifierFlags(declaration) & 8 /* Private */) {
-                    var typeClassDeclaration = getClassLikeDeclarationOfSymbol(type.symbol);
-                    if (!isNodeWithinClass(node, typeClassDeclaration)) {
-                        error(node, ts.Diagnostics.Cannot_extend_a_class_0_Class_constructor_is_marked_as_private, node.expression.text);
-                    }
-                }
+        function checkGrammarAccessor(accessor) {
+            var kind = accessor.kind;
+            if (languageVersion < 1 /* ES5 */) {
+                return grammarErrorOnNode(accessor.name, ts.Diagnostics.Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher);
             }
-        }
-        function getTargetSymbol(s) {
-            // if symbol is instantiated its flags are not copied from the 'target'
-            // so we'll need to get back original 'target' symbol to work with correct set of flags
-            return s.flags & 16777216 /* Instantiated */ ? getSymbolLinks(s).target : s;
-        }
-        function getClassLikeDeclarationOfSymbol(symbol) {
-            return ts.forEach(symbol.declarations, function (d) { return ts.isClassLike(d) ? d : undefined; });
-        }
-        function checkKindsOfPropertyMemberOverrides(type, baseType) {
-            // TypeScript 1.0 spec (April 2014): 8.2.3
-            // A derived class inherits all members from its base class it doesn't override.
-            // Inheritance means that a derived class implicitly contains all non - overridden members of the base class.
-            // Both public and private property members are inherited, but only public property members can be overridden.
-            // A property member in a derived class is said to override a property member in a base class
-            // when the derived class property member has the same name and kind(instance or static)
-            // as the base class property member.
-            // The type of an overriding property member must be assignable(section 3.8.4)
-            // to the type of the overridden property member, or otherwise a compile - time error occurs.
-            // Base class instance member functions can be overridden by derived class instance member functions,
-            // but not by other kinds of members.
-            // Base class instance member variables and accessors can be overridden by
-            // derived class instance member variables and accessors, but not by other kinds of members.
-            // NOTE: assignability is checked in checkClassDeclaration
-            var baseProperties = getPropertiesOfObjectType(baseType);
-            for (var _i = 0, baseProperties_1 = baseProperties; _i < baseProperties_1.length; _i++) {
-                var baseProperty = baseProperties_1[_i];
-                var base = getTargetSymbol(baseProperty);
-                if (base.flags & 134217728 /* Prototype */) {
-                    continue;
+            else if (ts.isInAmbientContext(accessor)) {
+                return grammarErrorOnNode(accessor.name, ts.Diagnostics.An_accessor_cannot_be_declared_in_an_ambient_context);
+            }
+            else if (accessor.body === undefined && !(ts.getModifierFlags(accessor) & 128 /* Abstract */)) {
+                return grammarErrorAtPos(ts.getSourceFileOfNode(accessor), accessor.end - 1, ";".length, ts.Diagnostics._0_expected, "{");
+            }
+            else if (accessor.body && ts.getModifierFlags(accessor) & 128 /* Abstract */) {
+                return grammarErrorOnNode(accessor, ts.Diagnostics.An_abstract_accessor_cannot_have_an_implementation);
+            }
+            else if (accessor.typeParameters) {
+                return grammarErrorOnNode(accessor.name, ts.Diagnostics.An_accessor_cannot_have_type_parameters);
+            }
+            else if (!doesAccessorHaveCorrectParameterCount(accessor)) {
+                return grammarErrorOnNode(accessor.name, kind === 153 /* GetAccessor */ ?
+                    ts.Diagnostics.A_get_accessor_cannot_have_parameters :
+                    ts.Diagnostics.A_set_accessor_must_have_exactly_one_parameter);
+            }
+            else if (kind === 154 /* SetAccessor */) {
+                if (accessor.type) {
+                    return grammarErrorOnNode(accessor.name, ts.Diagnostics.A_set_accessor_cannot_have_a_return_type_annotation);
                 }
-                var derived = getTargetSymbol(getPropertyOfObjectType(type, base.name));
-                var baseDeclarationFlags = getDeclarationModifierFlagsFromSymbol(base);
-                ts.Debug.assert(!!derived, "derived should point to something, even if it is the base class' declaration.");
-                if (derived) {
-                    // In order to resolve whether the inherited method was overridden in the base class or not,
-                    // we compare the Symbols obtained. Since getTargetSymbol returns the symbol on the *uninstantiated*
-                    // type declaration, derived and base resolve to the same symbol even in the case of generic classes.
-                    if (derived === base) {
-                        // derived class inherits base without override/redeclaration
-                        var derivedClassDecl = getClassLikeDeclarationOfSymbol(type.symbol);
-                        // It is an error to inherit an abstract member without implementing it or being declared abstract.
-                        // If there is no declaration for the derived class (as in the case of class expressions),
-                        // then the class cannot be declared abstract.
-                        if (baseDeclarationFlags & 128 /* Abstract */ && (!derivedClassDecl || !(ts.getModifierFlags(derivedClassDecl) & 128 /* Abstract */))) {
-                            if (derivedClassDecl.kind === 192 /* ClassExpression */) {
-                                error(derivedClassDecl, ts.Diagnostics.Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1, symbolToString(baseProperty), typeToString(baseType));
-                            }
-                            else {
-                                error(derivedClassDecl, ts.Diagnostics.Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2, typeToString(type), symbolToString(baseProperty), typeToString(baseType));
-                            }
-                        }
+                else {
+                    var parameter = accessor.parameters[0];
+                    if (parameter.dotDotDotToken) {
+                        return grammarErrorOnNode(parameter.dotDotDotToken, ts.Diagnostics.A_set_accessor_cannot_have_rest_parameter);
                     }
-                    else {
-                        // derived overrides base.
-                        var derivedDeclarationFlags = getDeclarationModifierFlagsFromSymbol(derived);
-                        if ((baseDeclarationFlags & 8 /* Private */) || (derivedDeclarationFlags & 8 /* Private */)) {
-                            // either base or derived property is private - not override, skip it
-                            continue;
-                        }
-                        if ((baseDeclarationFlags & 32 /* Static */) !== (derivedDeclarationFlags & 32 /* Static */)) {
-                            // value of 'static' is not the same for properties - not override, skip it
-                            continue;
-                        }
-                        if ((base.flags & derived.flags & 8192 /* Method */) || ((base.flags & 98308 /* PropertyOrAccessor */) && (derived.flags & 98308 /* PropertyOrAccessor */))) {
-                            // method is overridden with method or property/accessor is overridden with property/accessor - correct case
-                            continue;
-                        }
-                        var errorMessage = void 0;
-                        if (base.flags & 8192 /* Method */) {
-                            if (derived.flags & 98304 /* Accessor */) {
-                                errorMessage = ts.Diagnostics.Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_accessor;
-                            }
-                            else {
-                                ts.Debug.assert((derived.flags & 4 /* Property */) !== 0);
-                                errorMessage = ts.Diagnostics.Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_property;
-                            }
-                        }
-                        else if (base.flags & 4 /* Property */) {
-                            ts.Debug.assert((derived.flags & 8192 /* Method */) !== 0);
-                            errorMessage = ts.Diagnostics.Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_function;
-                        }
-                        else {
-                            ts.Debug.assert((base.flags & 98304 /* Accessor */) !== 0);
-                            ts.Debug.assert((derived.flags & 8192 /* Method */) !== 0);
-                            errorMessage = ts.Diagnostics.Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_function;
-                        }
-                        error(derived.valueDeclaration.name, errorMessage, typeToString(baseType), symbolToString(base), typeToString(type));
+                    else if (parameter.questionToken) {
+                        return grammarErrorOnNode(parameter.questionToken, ts.Diagnostics.A_set_accessor_cannot_have_an_optional_parameter);
+                    }
+                    else if (parameter.initializer) {
+                        return grammarErrorOnNode(accessor.name, ts.Diagnostics.A_set_accessor_parameter_cannot_have_an_initializer);
                     }
                 }
             }
         }
-        function isAccessor(kind) {
-            return kind === 149 /* GetAccessor */ || kind === 150 /* SetAccessor */;
+        /** Does the accessor have the right number of parameters?
+         * A get accessor has no parameters or a single `this` parameter.
+         * A set accessor has one parameter or a `this` parameter and one more parameter.
+         */
+        function doesAccessorHaveCorrectParameterCount(accessor) {
+            return getAccessorThisParameter(accessor) || accessor.parameters.length === (accessor.kind === 153 /* GetAccessor */ ? 0 : 1);
+        }
+        function getAccessorThisParameter(accessor) {
+            if (accessor.parameters.length === (accessor.kind === 153 /* GetAccessor */ ? 1 : 2)) {
+                return ts.getThisParameter(accessor);
+            }
+        }
+        function checkGrammarForNonSymbolComputedProperty(node, message) {
+            if (ts.isDynamicName(node)) {
+                return grammarErrorOnNode(node, message);
+            }
         }
-        function areTypeParametersIdentical(list1, list2) {
-            if (!list1 && !list2) {
+        function checkGrammarMethod(node) {
+            if (checkGrammarDisallowedModifiersOnObjectLiteralExpressionMethod(node) ||
+                checkGrammarFunctionLikeDeclaration(node) ||
+                checkGrammarForGenerator(node)) {
                 return true;
             }
-            if (!list1 || !list2 || list1.length !== list2.length) {
-                return false;
-            }
-            // TypeScript 1.0 spec (April 2014):
-            // When a generic interface has multiple declarations,  all declarations must have identical type parameter
-            // lists, i.e. identical type parameter names with identical constraints in identical order.
-            for (var i = 0, len = list1.length; i < len; i++) {
-                var tp1 = list1[i];
-                var tp2 = list2[i];
-                if (tp1.name.text !== tp2.name.text) {
-                    return false;
+            if (node.parent.kind === 178 /* ObjectLiteralExpression */) {
+                if (checkGrammarForInvalidQuestionMark(node.questionToken, ts.Diagnostics.An_object_member_cannot_be_declared_optional)) {
+                    return true;
                 }
-                if (!tp1.constraint && !tp2.constraint) {
-                    continue;
+                else if (node.body === undefined) {
+                    return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.end - 1, ";".length, ts.Diagnostics._0_expected, "{");
                 }
-                if (!tp1.constraint || !tp2.constraint) {
-                    return false;
+            }
+            if (ts.isClassLike(node.parent)) {
+                // Technically, computed properties in ambient contexts is disallowed
+                // for property declarations and accessors too, not just methods.
+                // However, property declarations disallow computed names in general,
+                // and accessors are not allowed in ambient contexts in general,
+                // so this error only really matters for methods.
+                if (ts.isInAmbientContext(node)) {
+                    return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_an_ambient_context_must_directly_refer_to_a_built_in_symbol);
                 }
-                if (!isTypeIdenticalTo(getTypeFromTypeNode(tp1.constraint), getTypeFromTypeNode(tp2.constraint))) {
-                    return false;
+                else if (!node.body) {
+                    return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_method_overload_must_directly_refer_to_a_built_in_symbol);
                 }
             }
-            return true;
-        }
-        function checkInheritedPropertiesAreIdentical(type, typeNode) {
-            var baseTypes = getBaseTypes(type);
-            if (baseTypes.length < 2) {
-                return true;
+            else if (node.parent.kind === 230 /* InterfaceDeclaration */) {
+                return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol);
             }
-            var seen = ts.createMap();
-            ts.forEach(resolveDeclaredMembers(type).declaredProperties, function (p) { seen[p.name] = { prop: p, containingType: type }; });
-            var ok = true;
-            for (var _i = 0, baseTypes_2 = baseTypes; _i < baseTypes_2.length; _i++) {
-                var base = baseTypes_2[_i];
-                var properties = getPropertiesOfObjectType(getTypeWithThisArgument(base, type.thisType));
-                for (var _a = 0, properties_5 = properties; _a < properties_5.length; _a++) {
-                    var prop = properties_5[_a];
-                    var existing = seen[prop.name];
-                    if (!existing) {
-                        seen[prop.name] = { prop: prop, containingType: base };
-                    }
-                    else {
-                        var isInheritedProperty = existing.containingType !== type;
-                        if (isInheritedProperty && !isPropertyIdenticalTo(existing.prop, prop)) {
-                            ok = false;
-                            var typeName1 = typeToString(existing.containingType);
-                            var typeName2 = typeToString(base);
-                            var errorInfo = ts.chainDiagnosticMessages(undefined, ts.Diagnostics.Named_property_0_of_types_1_and_2_are_not_identical, symbolToString(prop), typeName1, typeName2);
-                            errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.Interface_0_cannot_simultaneously_extend_types_1_and_2, typeToString(type), typeName1, typeName2);
-                            diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(typeNode, errorInfo));
-                        }
-                    }
-                }
+            else if (node.parent.kind === 163 /* TypeLiteral */) {
+                return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol);
             }
-            return ok;
         }
-        function checkInterfaceDeclaration(node) {
-            // Grammar checking
-            checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarInterfaceDeclaration(node);
-            checkTypeParameters(node.typeParameters);
-            if (produceDiagnostics) {
-                checkTypeNameIsReserved(node.name, ts.Diagnostics.Interface_name_cannot_be_0);
-                checkExportsOnMergedDeclarations(node);
-                var symbol = getSymbolOfNode(node);
-                checkTypeParameterListsIdentical(node, symbol);
-                // Only check this symbol once
-                var firstInterfaceDecl = ts.getDeclarationOfKind(symbol, 222 /* InterfaceDeclaration */);
-                if (node === firstInterfaceDecl) {
-                    var type = getDeclaredTypeOfSymbol(symbol);
-                    var typeWithThis = getTypeWithThisArgument(type);
-                    // run subsequent checks only if first set succeeded
-                    if (checkInheritedPropertiesAreIdentical(type, node.name)) {
-                        for (var _i = 0, _a = getBaseTypes(type); _i < _a.length; _i++) {
-                            var baseType = _a[_i];
-                            checkTypeAssignableTo(typeWithThis, getTypeWithThisArgument(baseType, type.thisType), node.name, ts.Diagnostics.Interface_0_incorrectly_extends_interface_1);
+        function checkGrammarBreakOrContinueStatement(node) {
+            var current = node;
+            while (current) {
+                if (ts.isFunctionLike(current)) {
+                    return grammarErrorOnNode(node, ts.Diagnostics.Jump_target_cannot_cross_function_boundary);
+                }
+                switch (current.kind) {
+                    case 222 /* LabeledStatement */:
+                        if (node.label && current.label.text === node.label.text) {
+                            // found matching label - verify that label usage is correct
+                            // continue can only target labels that are on iteration statements
+                            var isMisplacedContinueLabel = node.kind === 217 /* ContinueStatement */
+                                && !ts.isIterationStatement(current.statement, /*lookInLabeledStatement*/ true);
+                            if (isMisplacedContinueLabel) {
+                                return grammarErrorOnNode(node, ts.Diagnostics.A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement);
+                            }
+                            return false;
                         }
-                        checkIndexConstraints(type);
-                    }
+                        break;
+                    case 221 /* SwitchStatement */:
+                        if (node.kind === 218 /* BreakStatement */ && !node.label) {
+                            // unlabeled break within switch statement - ok
+                            return false;
+                        }
+                        break;
+                    default:
+                        if (ts.isIterationStatement(current, /*lookInLabeledStatement*/ false) && !node.label) {
+                            // unlabeled break or continue within iteration statement - ok
+                            return false;
+                        }
+                        break;
                 }
-                checkObjectTypeForDuplicateDeclarations(node);
+                current = current.parent;
             }
-            ts.forEach(ts.getInterfaceBaseTypeNodes(node), function (heritageElement) {
-                if (!ts.isEntityNameExpression(heritageElement.expression)) {
-                    error(heritageElement.expression, ts.Diagnostics.An_interface_can_only_extend_an_identifier_Slashqualified_name_with_optional_type_arguments);
+            if (node.label) {
+                var message = node.kind === 218 /* BreakStatement */
+                    ? ts.Diagnostics.A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement
+                    : ts.Diagnostics.A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement;
+                return grammarErrorOnNode(node, message);
+            }
+            else {
+                var message = node.kind === 218 /* BreakStatement */
+                    ? ts.Diagnostics.A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement
+                    : ts.Diagnostics.A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement;
+                return grammarErrorOnNode(node, message);
+            }
+        }
+        function checkGrammarBindingElement(node) {
+            if (node.dotDotDotToken) {
+                var elements = node.parent.elements;
+                if (node !== ts.lastOrUndefined(elements)) {
+                    return grammarErrorOnNode(node, ts.Diagnostics.A_rest_element_must_be_last_in_a_destructuring_pattern);
+                }
+                if (node.name.kind === 175 /* ArrayBindingPattern */ || node.name.kind === 174 /* ObjectBindingPattern */) {
+                    return grammarErrorOnNode(node.name, ts.Diagnostics.A_rest_element_cannot_contain_a_binding_pattern);
+                }
+                if (node.initializer) {
+                    // Error on equals token which immediately precedes the initializer
+                    return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.initializer.pos - 1, 1, ts.Diagnostics.A_rest_element_cannot_have_an_initializer);
                 }
-                checkTypeReferenceNode(heritageElement);
-            });
-            ts.forEach(node.members, checkSourceElement);
-            if (produceDiagnostics) {
-                checkTypeForDuplicateIndexSignatures(node);
-                registerForUnusedIdentifiersCheck(node);
             }
         }
-        function checkTypeAliasDeclaration(node) {
-            // Grammar checking
-            checkGrammarDecorators(node) || checkGrammarModifiers(node);
-            checkTypeNameIsReserved(node.name, ts.Diagnostics.Type_alias_name_cannot_be_0);
-            checkSourceElement(node.type);
+        function isStringOrNumberLiteralExpression(expr) {
+            return expr.kind === 9 /* StringLiteral */ || expr.kind === 8 /* NumericLiteral */ ||
+                expr.kind === 192 /* PrefixUnaryExpression */ && expr.operator === 38 /* MinusToken */ &&
+                    expr.operand.kind === 8 /* NumericLiteral */;
         }
-        function computeEnumMemberValues(node) {
-            var nodeLinks = getNodeLinks(node);
-            if (!(nodeLinks.flags & 16384 /* EnumValuesComputed */)) {
-                var enumSymbol = getSymbolOfNode(node);
-                var enumType = getDeclaredTypeOfSymbol(enumSymbol);
-                var autoValue = 0; // set to undefined when enum member is non-constant
-                var ambient = ts.isInAmbientContext(node);
-                var enumIsConst = ts.isConst(node);
-                for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
-                    var member = _a[_i];
-                    if (isComputedNonLiteralName(member.name)) {
-                        error(member.name, ts.Diagnostics.Computed_property_names_are_not_allowed_in_enums);
-                    }
-                    else {
-                        var text = getTextOfPropertyName(member.name);
-                        if (isNumericLiteralName(text) && !isInfinityOrNaNString(text)) {
-                            error(member.name, ts.Diagnostics.An_enum_member_cannot_have_a_numeric_name);
+        function checkGrammarVariableDeclaration(node) {
+            if (node.parent.parent.kind !== 215 /* ForInStatement */ && node.parent.parent.kind !== 216 /* ForOfStatement */) {
+                if (ts.isInAmbientContext(node)) {
+                    if (node.initializer) {
+                        if (ts.isConst(node) && !node.type) {
+                            if (!isStringOrNumberLiteralExpression(node.initializer)) {
+                                return grammarErrorOnNode(node.initializer, ts.Diagnostics.A_const_initializer_in_an_ambient_context_must_be_a_string_or_numeric_literal);
+                            }
+                        }
+                        else {
+                            // Error on equals token which immediate precedes the initializer
+                            var equalsTokenLength = "=".length;
+                            return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.initializer.pos - equalsTokenLength, equalsTokenLength, ts.Diagnostics.Initializers_are_not_allowed_in_ambient_contexts);
                         }
                     }
-                    var previousEnumMemberIsNonConstant = autoValue === undefined;
-                    var initializer = member.initializer;
-                    if (initializer) {
-                        autoValue = computeConstantValueForEnumMemberInitializer(initializer, enumType, enumIsConst, ambient);
-                    }
-                    else if (ambient && !enumIsConst) {
-                        // In ambient enum declarations that specify no const modifier, enum member declarations
-                        // that omit a value are considered computed members (as opposed to having auto-incremented values assigned).
-                        autoValue = undefined;
+                    if (node.initializer && !(ts.isConst(node) && isStringOrNumberLiteralExpression(node.initializer))) {
+                        // Error on equals token which immediate precedes the initializer
+                        var equalsTokenLength = "=".length;
+                        return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.initializer.pos - equalsTokenLength, equalsTokenLength, ts.Diagnostics.Initializers_are_not_allowed_in_ambient_contexts);
                     }
-                    else if (previousEnumMemberIsNonConstant) {
-                        // If the member declaration specifies no value, the member is considered a constant enum member.
-                        // If the member is the first member in the enum declaration, it is assigned the value zero.
-                        // Otherwise, it is assigned the value of the immediately preceding member plus one,
-                        // and an error occurs if the immediately preceding member is not a constant enum member
-                        error(member.name, ts.Diagnostics.Enum_member_must_have_initializer);
+                }
+                else if (!node.initializer) {
+                    if (ts.isBindingPattern(node.name) && !ts.isBindingPattern(node.parent)) {
+                        return grammarErrorOnNode(node, ts.Diagnostics.A_destructuring_declaration_must_have_an_initializer);
                     }
-                    if (autoValue !== undefined) {
-                        getNodeLinks(member).enumMemberValue = autoValue;
-                        autoValue++;
+                    if (ts.isConst(node)) {
+                        return grammarErrorOnNode(node, ts.Diagnostics.const_declarations_must_be_initialized);
                     }
                 }
-                nodeLinks.flags |= 16384 /* EnumValuesComputed */;
             }
-            function computeConstantValueForEnumMemberInitializer(initializer, enumType, enumIsConst, ambient) {
-                // Controls if error should be reported after evaluation of constant value is completed
-                // Can be false if another more precise error was already reported during evaluation.
-                var reportError = true;
-                var value = evalConstant(initializer);
-                if (reportError) {
-                    if (value === undefined) {
-                        if (enumIsConst) {
-                            error(initializer, ts.Diagnostics.In_const_enum_declarations_member_initializer_must_be_constant_expression);
-                        }
-                        else if (ambient) {
-                            error(initializer, ts.Diagnostics.In_ambient_enum_declarations_member_initializer_must_be_constant_expression);
-                        }
-                        else {
-                            // Only here do we need to check that the initializer is assignable to the enum type.
-                            checkTypeAssignableTo(checkExpression(initializer), enumType, initializer, /*headMessage*/ undefined);
-                        }
-                    }
-                    else if (enumIsConst) {
-                        if (isNaN(value)) {
-                            error(initializer, ts.Diagnostics.const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN);
-                        }
-                        else if (!isFinite(value)) {
-                            error(initializer, ts.Diagnostics.const_enum_member_initializer_was_evaluated_to_a_non_finite_value);
-                        }
+            if (compilerOptions.module !== ts.ModuleKind.ES2015 && compilerOptions.module !== ts.ModuleKind.System && !compilerOptions.noEmit &&
+                !ts.isInAmbientContext(node.parent.parent) && ts.hasModifier(node.parent.parent, 1 /* Export */)) {
+                checkESModuleMarker(node.name);
+            }
+            var checkLetConstNames = (ts.isLet(node) || ts.isConst(node));
+            // 1. LexicalDeclaration : LetOrConst BindingList ;
+            // It is a Syntax Error if the BoundNames of BindingList contains "let".
+            // 2. ForDeclaration: ForDeclaration : LetOrConst ForBinding
+            // It is a Syntax Error if the BoundNames of ForDeclaration contains "let".
+            // It is a SyntaxError if a VariableDeclaration or VariableDeclarationNoIn occurs within strict code
+            // and its Identifier is eval or arguments
+            return checkLetConstNames && checkGrammarNameInLetOrConstDeclarations(node.name);
+        }
+        function checkESModuleMarker(name) {
+            if (name.kind === 71 /* Identifier */) {
+                if (ts.unescapeIdentifier(name.text) === "__esModule") {
+                    return grammarErrorOnNode(name, ts.Diagnostics.Identifier_expected_esModule_is_reserved_as_an_exported_marker_when_transforming_ECMAScript_modules);
+                }
+            }
+            else {
+                var elements = name.elements;
+                for (var _i = 0, elements_2 = elements; _i < elements_2.length; _i++) {
+                    var element = elements_2[_i];
+                    if (!ts.isOmittedExpression(element)) {
+                        return checkESModuleMarker(element.name);
                     }
                 }
-                return value;
-                function evalConstant(e) {
-                    switch (e.kind) {
-                        case 185 /* PrefixUnaryExpression */:
-                            var value_1 = evalConstant(e.operand);
-                            if (value_1 === undefined) {
-                                return undefined;
-                            }
-                            switch (e.operator) {
-                                case 35 /* PlusToken */: return value_1;
-                                case 36 /* MinusToken */: return -value_1;
-                                case 50 /* TildeToken */: return ~value_1;
-                            }
-                            return undefined;
-                        case 187 /* BinaryExpression */:
-                            var left = evalConstant(e.left);
-                            if (left === undefined) {
-                                return undefined;
-                            }
-                            var right = evalConstant(e.right);
-                            if (right === undefined) {
-                                return undefined;
-                            }
-                            switch (e.operatorToken.kind) {
-                                case 47 /* BarToken */: return left | right;
-                                case 46 /* AmpersandToken */: return left & right;
-                                case 44 /* GreaterThanGreaterThanToken */: return left >> right;
-                                case 45 /* GreaterThanGreaterThanGreaterThanToken */: return left >>> right;
-                                case 43 /* LessThanLessThanToken */: return left << right;
-                                case 48 /* CaretToken */: return left ^ right;
-                                case 37 /* AsteriskToken */: return left * right;
-                                case 39 /* SlashToken */: return left / right;
-                                case 35 /* PlusToken */: return left + right;
-                                case 36 /* MinusToken */: return left - right;
-                                case 40 /* PercentToken */: return left % right;
-                            }
-                            return undefined;
-                        case 8 /* NumericLiteral */:
-                            return +e.text;
-                        case 178 /* ParenthesizedExpression */:
-                            return evalConstant(e.expression);
-                        case 69 /* Identifier */:
-                        case 173 /* ElementAccessExpression */:
-                        case 172 /* PropertyAccessExpression */:
-                            var member = initializer.parent;
-                            var currentType = getTypeOfSymbol(getSymbolOfNode(member.parent));
-                            var enumType_1;
-                            var propertyName = void 0;
-                            if (e.kind === 69 /* Identifier */) {
-                                // unqualified names can refer to member that reside in different declaration of the enum so just doing name resolution won't work.
-                                // instead pick current enum type and later try to fetch member from the type
-                                enumType_1 = currentType;
-                                propertyName = e.text;
-                            }
-                            else {
-                                var expression = void 0;
-                                if (e.kind === 173 /* ElementAccessExpression */) {
-                                    if (e.argumentExpression === undefined ||
-                                        e.argumentExpression.kind !== 9 /* StringLiteral */) {
-                                        return undefined;
-                                    }
-                                    expression = e.expression;
-                                    propertyName = e.argumentExpression.text;
-                                }
-                                else {
-                                    expression = e.expression;
-                                    propertyName = e.name.text;
-                                }
-                                // expression part in ElementAccess\PropertyAccess should be either identifier or dottedName
-                                var current = expression;
-                                while (current) {
-                                    if (current.kind === 69 /* Identifier */) {
-                                        break;
-                                    }
-                                    else if (current.kind === 172 /* PropertyAccessExpression */) {
-                                        current = current.expression;
-                                    }
-                                    else {
-                                        return undefined;
-                                    }
-                                }
-                                enumType_1 = checkExpression(expression);
-                                // allow references to constant members of other enums
-                                if (!(enumType_1.symbol && (enumType_1.symbol.flags & 384 /* Enum */))) {
-                                    return undefined;
-                                }
-                            }
-                            if (propertyName === undefined) {
-                                return undefined;
-                            }
-                            var property = getPropertyOfObjectType(enumType_1, propertyName);
-                            if (!property || !(property.flags & 8 /* EnumMember */)) {
-                                return undefined;
-                            }
-                            var propertyDecl = property.valueDeclaration;
-                            // self references are illegal
-                            if (member === propertyDecl) {
-                                return undefined;
-                            }
-                            // illegal case: forward reference
-                            if (!isBlockScopedNameDeclaredBeforeUse(propertyDecl, member)) {
-                                reportError = false;
-                                error(e, ts.Diagnostics.A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums);
-                                return undefined;
-                            }
-                            return getNodeLinks(propertyDecl).enumMemberValue;
+            }
+        }
+        function checkGrammarNameInLetOrConstDeclarations(name) {
+            if (name.kind === 71 /* Identifier */) {
+                if (name.originalKeywordKind === 110 /* LetKeyword */) {
+                    return grammarErrorOnNode(name, ts.Diagnostics.let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations);
+                }
+            }
+            else {
+                var elements = name.elements;
+                for (var _i = 0, elements_3 = elements; _i < elements_3.length; _i++) {
+                    var element = elements_3[_i];
+                    if (!ts.isOmittedExpression(element)) {
+                        checkGrammarNameInLetOrConstDeclarations(element.name);
                     }
                 }
             }
         }
-        function checkEnumDeclaration(node) {
-            if (!produceDiagnostics) {
-                return;
+        function checkGrammarVariableDeclarationList(declarationList) {
+            var declarations = declarationList.declarations;
+            if (checkGrammarForDisallowedTrailingComma(declarationList.declarations)) {
+                return true;
             }
-            // Grammar checking
-            checkGrammarDecorators(node) || checkGrammarModifiers(node);
-            checkTypeNameIsReserved(node.name, ts.Diagnostics.Enum_name_cannot_be_0);
-            checkCollisionWithCapturedThisVariable(node, node.name);
-            checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
-            checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
-            checkExportsOnMergedDeclarations(node);
-            computeEnumMemberValues(node);
-            var enumIsConst = ts.isConst(node);
-            if (compilerOptions.isolatedModules && enumIsConst && ts.isInAmbientContext(node)) {
-                error(node.name, ts.Diagnostics.Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided);
+            if (!declarationList.declarations.length) {
+                return grammarErrorAtPos(ts.getSourceFileOfNode(declarationList), declarations.pos, declarations.end - declarations.pos, ts.Diagnostics.Variable_declaration_list_cannot_be_empty);
             }
-            // Spec 2014 - Section 9.3:
-            // It isn't possible for one enum declaration to continue the automatic numbering sequence of another,
-            // and when an enum type has multiple declarations, only one declaration is permitted to omit a value
-            // for the first member.
-            //
-            // Only perform this check once per symbol
-            var enumSymbol = getSymbolOfNode(node);
-            var firstDeclaration = ts.getDeclarationOfKind(enumSymbol, node.kind);
-            if (node === firstDeclaration) {
-                if (enumSymbol.declarations.length > 1) {
-                    // check that const is placed\omitted on all enum declarations
-                    ts.forEach(enumSymbol.declarations, function (decl) {
-                        if (ts.isConstEnumDeclaration(decl) !== enumIsConst) {
-                            error(decl.name, ts.Diagnostics.Enum_declarations_must_all_be_const_or_non_const);
-                        }
-                    });
+        }
+        function allowLetAndConstDeclarations(parent) {
+            switch (parent.kind) {
+                case 211 /* IfStatement */:
+                case 212 /* DoStatement */:
+                case 213 /* WhileStatement */:
+                case 220 /* WithStatement */:
+                case 214 /* ForStatement */:
+                case 215 /* ForInStatement */:
+                case 216 /* ForOfStatement */:
+                    return false;
+                case 222 /* LabeledStatement */:
+                    return allowLetAndConstDeclarations(parent.parent);
+            }
+            return true;
+        }
+        function checkGrammarForDisallowedLetOrConstStatement(node) {
+            if (!allowLetAndConstDeclarations(node.parent)) {
+                if (ts.isLet(node.declarationList)) {
+                    return grammarErrorOnNode(node, ts.Diagnostics.let_declarations_can_only_be_declared_inside_a_block);
+                }
+                else if (ts.isConst(node.declarationList)) {
+                    return grammarErrorOnNode(node, ts.Diagnostics.const_declarations_can_only_be_declared_inside_a_block);
                 }
-                var seenEnumMissingInitialInitializer_1 = false;
-                ts.forEach(enumSymbol.declarations, function (declaration) {
-                    // return true if we hit a violation of the rule, false otherwise
-                    if (declaration.kind !== 224 /* EnumDeclaration */) {
-                        return false;
-                    }
-                    var enumDeclaration = declaration;
-                    if (!enumDeclaration.members.length) {
-                        return false;
-                    }
-                    var firstEnumMember = enumDeclaration.members[0];
-                    if (!firstEnumMember.initializer) {
-                        if (seenEnumMissingInitialInitializer_1) {
-                            error(firstEnumMember.name, ts.Diagnostics.In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enum_element);
-                        }
-                        else {
-                            seenEnumMissingInitialInitializer_1 = true;
-                        }
-                    }
-                });
             }
         }
-        function getFirstNonAmbientClassOrFunctionDeclaration(symbol) {
-            var declarations = symbol.declarations;
-            for (var _i = 0, declarations_5 = declarations; _i < declarations_5.length; _i++) {
-                var declaration = declarations_5[_i];
-                if ((declaration.kind === 221 /* ClassDeclaration */ ||
-                    (declaration.kind === 220 /* FunctionDeclaration */ && ts.nodeIsPresent(declaration.body))) &&
-                    !ts.isInAmbientContext(declaration)) {
-                    return declaration;
+        function checkGrammarMetaProperty(node) {
+            if (node.keywordToken === 94 /* NewKeyword */) {
+                if (node.name.text !== "target") {
+                    return grammarErrorOnNode(node.name, ts.Diagnostics._0_is_not_a_valid_meta_property_for_keyword_1_Did_you_mean_2, node.name.text, ts.tokenToString(node.keywordToken), "target");
                 }
             }
-            return undefined;
         }
-        function inSameLexicalScope(node1, node2) {
-            var container1 = ts.getEnclosingBlockScopeContainer(node1);
-            var container2 = ts.getEnclosingBlockScopeContainer(node2);
-            if (isGlobalSourceFile(container1)) {
-                return isGlobalSourceFile(container2);
+        function hasParseDiagnostics(sourceFile) {
+            return sourceFile.parseDiagnostics.length > 0;
+        }
+        function grammarErrorOnFirstToken(node, message, arg0, arg1, arg2) {
+            var sourceFile = ts.getSourceFileOfNode(node);
+            if (!hasParseDiagnostics(sourceFile)) {
+                var span_4 = ts.getSpanOfTokenAtPosition(sourceFile, node.pos);
+                diagnostics.add(ts.createFileDiagnostic(sourceFile, span_4.start, span_4.length, message, arg0, arg1, arg2));
+                return true;
             }
-            else if (isGlobalSourceFile(container2)) {
-                return false;
+        }
+        function grammarErrorAtPos(sourceFile, start, length, message, arg0, arg1, arg2) {
+            if (!hasParseDiagnostics(sourceFile)) {
+                diagnostics.add(ts.createFileDiagnostic(sourceFile, start, length, message, arg0, arg1, arg2));
+                return true;
             }
-            else {
-                return container1 === container2;
+        }
+        function grammarErrorOnNode(node, message, arg0, arg1, arg2) {
+            var sourceFile = ts.getSourceFileOfNode(node);
+            if (!hasParseDiagnostics(sourceFile)) {
+                diagnostics.add(ts.createDiagnosticForNode(node, message, arg0, arg1, arg2));
+                return true;
             }
         }
-        function checkModuleDeclaration(node) {
-            if (produceDiagnostics) {
-                // Grammar checking
-                var isGlobalAugmentation = ts.isGlobalScopeAugmentation(node);
-                var inAmbientContext = ts.isInAmbientContext(node);
-                if (isGlobalAugmentation && !inAmbientContext) {
-                    error(node.name, ts.Diagnostics.Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambient_context);
+        function checkGrammarConstructorTypeParameters(node) {
+            if (node.typeParameters) {
+                return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.typeParameters.pos, node.typeParameters.end - node.typeParameters.pos, ts.Diagnostics.Type_parameters_cannot_appear_on_a_constructor_declaration);
+            }
+        }
+        function checkGrammarConstructorTypeAnnotation(node) {
+            if (node.type) {
+                return grammarErrorOnNode(node.type, ts.Diagnostics.Type_annotation_cannot_appear_on_a_constructor_declaration);
+            }
+        }
+        function checkGrammarProperty(node) {
+            if (ts.isClassLike(node.parent)) {
+                if (checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_class_property_declaration_must_directly_refer_to_a_built_in_symbol)) {
+                    return true;
                 }
-                var isAmbientExternalModule = ts.isAmbientModule(node);
-                var contextErrorMessage = isAmbientExternalModule
-                    ? ts.Diagnostics.An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file
-                    : ts.Diagnostics.A_namespace_declaration_is_only_allowed_in_a_namespace_or_module;
-                if (checkGrammarModuleElementContext(node, contextErrorMessage)) {
-                    // If we hit a module declaration in an illegal context, just bail out to avoid cascading errors.
-                    return;
+            }
+            else if (node.parent.kind === 230 /* InterfaceDeclaration */) {
+                if (checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol)) {
+                    return true;
                 }
-                if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node)) {
-                    if (!inAmbientContext && node.name.kind === 9 /* StringLiteral */) {
-                        grammarErrorOnNode(node.name, ts.Diagnostics.Only_ambient_modules_can_use_quoted_names);
-                    }
+                if (node.initializer) {
+                    return grammarErrorOnNode(node.initializer, ts.Diagnostics.An_interface_property_cannot_have_an_initializer);
                 }
-                checkCollisionWithCapturedThisVariable(node, node.name);
-                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
-                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
-                checkExportsOnMergedDeclarations(node);
-                var symbol = getSymbolOfNode(node);
-                // The following checks only apply on a non-ambient instantiated module declaration.
-                if (symbol.flags & 512 /* ValueModule */
-                    && symbol.declarations.length > 1
-                    && !inAmbientContext
-                    && ts.isInstantiatedModule(node, compilerOptions.preserveConstEnums || compilerOptions.isolatedModules)) {
-                    var firstNonAmbientClassOrFunc = getFirstNonAmbientClassOrFunctionDeclaration(symbol);
-                    if (firstNonAmbientClassOrFunc) {
-                        if (ts.getSourceFileOfNode(node) !== ts.getSourceFileOfNode(firstNonAmbientClassOrFunc)) {
-                            error(node.name, ts.Diagnostics.A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merged);
-                        }
-                        else if (node.pos < firstNonAmbientClassOrFunc.pos) {
-                            error(node.name, ts.Diagnostics.A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged);
-                        }
-                    }
-                    // if the module merges with a class declaration in the same lexical scope,
-                    // we need to track this to ensure the correct emit.
-                    var mergedClass = ts.getDeclarationOfKind(symbol, 221 /* ClassDeclaration */);
-                    if (mergedClass &&
-                        inSameLexicalScope(node, mergedClass)) {
-                        getNodeLinks(node).flags |= 32768 /* LexicalModuleMergesWithClass */;
-                    }
+            }
+            else if (node.parent.kind === 163 /* TypeLiteral */) {
+                if (checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol)) {
+                    return true;
                 }
-                if (isAmbientExternalModule) {
-                    if (ts.isExternalModuleAugmentation(node)) {
-                        // body of the augmentation should be checked for consistency only if augmentation was applied to its target (either global scope or module)
-                        // otherwise we'll be swamped in cascading errors.
-                        // We can detect if augmentation was applied using following rules:
-                        // - augmentation for a global scope is always applied
-                        // - augmentation for some external module is applied if symbol for augmentation is merged (it was combined with target module).
-                        var checkBody = isGlobalAugmentation || (getSymbolOfNode(node).flags & 33554432 /* Merged */);
-                        if (checkBody && node.body) {
-                            // body of ambient external module is always a module block
-                            for (var _i = 0, _a = node.body.statements; _i < _a.length; _i++) {
-                                var statement = _a[_i];
-                                checkModuleAugmentationElement(statement, isGlobalAugmentation);
-                            }
-                        }
-                    }
-                    else if (isGlobalSourceFile(node.parent)) {
-                        if (isGlobalAugmentation) {
-                            error(node.name, ts.Diagnostics.Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations);
-                        }
-                        else if (ts.isExternalModuleNameRelative(node.name.text)) {
-                            error(node.name, ts.Diagnostics.Ambient_module_declaration_cannot_specify_relative_module_name);
-                        }
+                if (node.initializer) {
+                    return grammarErrorOnNode(node.initializer, ts.Diagnostics.A_type_literal_property_cannot_have_an_initializer);
+                }
+            }
+            if (ts.isInAmbientContext(node) && node.initializer) {
+                return grammarErrorOnFirstToken(node.initializer, ts.Diagnostics.Initializers_are_not_allowed_in_ambient_contexts);
+            }
+        }
+        function checkGrammarTopLevelElementForRequiredDeclareModifier(node) {
+            // A declare modifier is required for any top level .d.ts declaration except export=, export default, export as namespace
+            // interfaces and imports categories:
+            //
+            //  DeclarationElement:
+            //     ExportAssignment
+            //     export_opt   InterfaceDeclaration
+            //     export_opt   TypeAliasDeclaration
+            //     export_opt   ImportDeclaration
+            //     export_opt   ExternalImportDeclaration
+            //     export_opt   AmbientDeclaration
+            //
+            // TODO: The spec needs to be amended to reflect this grammar.
+            if (node.kind === 230 /* InterfaceDeclaration */ ||
+                node.kind === 231 /* TypeAliasDeclaration */ ||
+                node.kind === 238 /* ImportDeclaration */ ||
+                node.kind === 237 /* ImportEqualsDeclaration */ ||
+                node.kind === 244 /* ExportDeclaration */ ||
+                node.kind === 243 /* ExportAssignment */ ||
+                node.kind === 236 /* NamespaceExportDeclaration */ ||
+                ts.getModifierFlags(node) & (2 /* Ambient */ | 1 /* Export */ | 512 /* Default */)) {
+                return false;
+            }
+            return grammarErrorOnFirstToken(node, ts.Diagnostics.A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file);
+        }
+        function checkGrammarTopLevelElementsForRequiredDeclareModifier(file) {
+            for (var _i = 0, _a = file.statements; _i < _a.length; _i++) {
+                var decl = _a[_i];
+                if (ts.isDeclaration(decl) || decl.kind === 208 /* VariableStatement */) {
+                    if (checkGrammarTopLevelElementForRequiredDeclareModifier(decl)) {
+                        return true;
                     }
-                    else {
-                        if (isGlobalAugmentation) {
-                            error(node.name, ts.Diagnostics.Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations);
-                        }
-                        else {
-                            // Node is not an augmentation and is not located on the script level.
-                            // This means that this is declaration of ambient module that is located in other module or namespace which is prohibited.
-                            error(node.name, ts.Diagnostics.Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces);
-                        }
+                }
+            }
+        }
+        function checkGrammarSourceFile(node) {
+            return ts.isInAmbientContext(node) && checkGrammarTopLevelElementsForRequiredDeclareModifier(node);
+        }
+        function checkGrammarStatementInAmbientContext(node) {
+            if (ts.isInAmbientContext(node)) {
+                // An accessors is already reported about the ambient context
+                if (ts.isAccessor(node.parent)) {
+                    return getNodeLinks(node).hasReportedStatementInAmbientContext = true;
+                }
+                // Find containing block which is either Block, ModuleBlock, SourceFile
+                var links = getNodeLinks(node);
+                if (!links.hasReportedStatementInAmbientContext && ts.isFunctionLike(node.parent)) {
+                    return getNodeLinks(node).hasReportedStatementInAmbientContext = grammarErrorOnFirstToken(node, ts.Diagnostics.An_implementation_cannot_be_declared_in_ambient_contexts);
+                }
+                // We are either parented by another statement, or some sort of block.
+                // If we're in a block, we only want to really report an error once
+                // to prevent noisiness.  So use a bit on the block to indicate if
+                // this has already been reported, and don't report if it has.
+                //
+                if (node.parent.kind === 207 /* Block */ || node.parent.kind === 234 /* ModuleBlock */ || node.parent.kind === 265 /* SourceFile */) {
+                    var links_1 = getNodeLinks(node.parent);
+                    // Check if the containing block ever report this error
+                    if (!links_1.hasReportedStatementInAmbientContext) {
+                        return links_1.hasReportedStatementInAmbientContext = grammarErrorOnFirstToken(node, ts.Diagnostics.Statements_are_not_allowed_in_ambient_contexts);
                     }
                 }
+                else {
+                    // We must be parented by a statement.  If so, there's no need
+                    // to report the error as our parent will have already done it.
+                    // Debug.assert(isStatement(node.parent));
+                }
+            }
+        }
+        function checkGrammarNumericLiteral(node) {
+            // Grammar checking
+            if (node.numericLiteralFlags & 4 /* Octal */) {
+                var diagnosticMessage = void 0;
+                if (languageVersion >= 1 /* ES5 */) {
+                    diagnosticMessage = ts.Diagnostics.Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher_Use_the_syntax_0;
+                }
+                else if (ts.isChildOfNodeWithKind(node, 173 /* LiteralType */)) {
+                    diagnosticMessage = ts.Diagnostics.Octal_literal_types_must_use_ES2015_syntax_Use_the_syntax_0;
+                }
+                else if (ts.isChildOfNodeWithKind(node, 264 /* EnumMember */)) {
+                    diagnosticMessage = ts.Diagnostics.Octal_literals_are_not_allowed_in_enums_members_initializer_Use_the_syntax_0;
+                }
+                if (diagnosticMessage) {
+                    var withMinus = ts.isPrefixUnaryExpression(node.parent) && node.parent.operator === 38 /* MinusToken */;
+                    var literal = (withMinus ? "-" : "") + "0o" + node.text;
+                    return grammarErrorOnNode(withMinus ? node.parent : node, diagnosticMessage, literal);
+                }
+            }
+        }
+        function grammarErrorAfterFirstToken(node, message, arg0, arg1, arg2) {
+            var sourceFile = ts.getSourceFileOfNode(node);
+            if (!hasParseDiagnostics(sourceFile)) {
+                var span_5 = ts.getSpanOfTokenAtPosition(sourceFile, node.pos);
+                diagnostics.add(ts.createFileDiagnostic(sourceFile, ts.textSpanEnd(span_5), /*length*/ 0, message, arg0, arg1, arg2));
+                return true;
+            }
+        }
+        function getAmbientModules() {
+            var result = [];
+            globals.forEach(function (global, sym) {
+                if (ambientModuleSymbolRegex.test(sym)) {
+                    result.push(global);
+                }
+            });
+            return result;
+        }
+        function checkGrammarImportCallExpression(node) {
+            if (modulekind === ts.ModuleKind.ES2015) {
+                return grammarErrorOnNode(node, ts.Diagnostics.Dynamic_import_cannot_be_used_when_targeting_ECMAScript_2015_modules);
+            }
+            if (node.typeArguments) {
+                return grammarErrorOnNode(node, ts.Diagnostics.Dynamic_import_cannot_have_type_arguments);
+            }
+            var nodeArguments = node.arguments;
+            if (nodeArguments.length !== 1) {
+                return grammarErrorOnNode(node, ts.Diagnostics.Dynamic_import_must_have_one_specifier_as_an_argument);
+            }
+            // see: parseArgumentOrArrayLiteralElement...we use this function which parse arguments of callExpression to parse specifier for dynamic import.
+            // parseArgumentOrArrayLiteralElement allows spread element to be in an argument list which is not allowed as specifier in dynamic import.
+            if (ts.isSpreadElement(nodeArguments[0])) {
+                return grammarErrorOnNode(nodeArguments[0], ts.Diagnostics.Specifier_of_dynamic_import_cannot_be_spread_element);
+            }
+        }
+    }
+    ts.createTypeChecker = createTypeChecker;
+    /** Like 'isDeclarationName', but returns true for LHS of `import { x as y }` or `export { x as y }`. */
+    function isDeclarationNameOrImportPropertyName(name) {
+        switch (name.parent.kind) {
+            case 242 /* ImportSpecifier */:
+            case 246 /* ExportSpecifier */:
+                return true;
+            default:
+                return ts.isDeclarationName(name);
+        }
+    }
+})(ts || (ts = {}));
+/// <reference path="sys.ts"/>
+/// <reference path="types.ts"/>
+/// <reference path="core.ts"/>
+/// <reference path="diagnosticInformationMap.generated.ts"/>
+/// <reference path="parser.ts"/>
+var ts;
+(function (ts) {
+    /* @internal */
+    ts.compileOnSaveCommandLineOption = { name: "compileOnSave", type: "boolean" };
+    /* @internal */
+    ts.optionDeclarations = [
+        // CommandLine only options
+        {
+            name: "help",
+            shortName: "h",
+            type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Command_line_Options,
+            description: ts.Diagnostics.Print_this_message,
+        },
+        {
+            name: "help",
+            shortName: "?",
+            type: "boolean"
+        },
+        {
+            name: "all",
+            type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Command_line_Options,
+            description: ts.Diagnostics.Show_all_compiler_options,
+        },
+        {
+            name: "version",
+            shortName: "v",
+            type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Command_line_Options,
+            description: ts.Diagnostics.Print_the_compiler_s_version,
+        },
+        {
+            name: "init",
+            type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Command_line_Options,
+            description: ts.Diagnostics.Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file,
+        },
+        {
+            name: "project",
+            shortName: "p",
+            type: "string",
+            isFilePath: true,
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Command_line_Options,
+            paramType: ts.Diagnostics.FILE_OR_DIRECTORY,
+            description: ts.Diagnostics.Compile_the_project_given_the_path_to_its_configuration_file_or_to_a_folder_with_a_tsconfig_json,
+        },
+        {
+            name: "pretty",
+            type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Command_line_Options,
+            description: ts.Diagnostics.Stylize_errors_and_messages_using_color_and_context_experimental
+        },
+        {
+            name: "watch",
+            shortName: "w",
+            type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Command_line_Options,
+            description: ts.Diagnostics.Watch_input_files,
+        },
+        // Basic
+        {
+            name: "target",
+            shortName: "t",
+            type: ts.createMapFromTemplate({
+                "es3": 0 /* ES3 */,
+                "es5": 1 /* ES5 */,
+                "es6": 2 /* ES2015 */,
+                "es2015": 2 /* ES2015 */,
+                "es2016": 3 /* ES2016 */,
+                "es2017": 4 /* ES2017 */,
+                "esnext": 5 /* ESNext */,
+            }),
+            paramType: ts.Diagnostics.VERSION,
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Basic_Options,
+            description: ts.Diagnostics.Specify_ECMAScript_target_version_Colon_ES3_default_ES5_ES2015_ES2016_ES2017_or_ESNEXT,
+        },
+        {
+            name: "module",
+            shortName: "m",
+            type: ts.createMapFromTemplate({
+                "none": ts.ModuleKind.None,
+                "commonjs": ts.ModuleKind.CommonJS,
+                "amd": ts.ModuleKind.AMD,
+                "system": ts.ModuleKind.System,
+                "umd": ts.ModuleKind.UMD,
+                "es6": ts.ModuleKind.ES2015,
+                "es2015": ts.ModuleKind.ES2015,
+                "esnext": ts.ModuleKind.ESNext
+            }),
+            paramType: ts.Diagnostics.KIND,
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Basic_Options,
+            description: ts.Diagnostics.Specify_module_code_generation_Colon_commonjs_amd_system_umd_es2015_or_ESNext,
+        },
+        {
+            name: "lib",
+            type: "list",
+            element: {
+                name: "lib",
+                type: ts.createMapFromTemplate({
+                    // JavaScript only
+                    "es5": "lib.es5.d.ts",
+                    "es6": "lib.es2015.d.ts",
+                    "es2015": "lib.es2015.d.ts",
+                    "es7": "lib.es2016.d.ts",
+                    "es2016": "lib.es2016.d.ts",
+                    "es2017": "lib.es2017.d.ts",
+                    "esnext": "lib.esnext.d.ts",
+                    // Host only
+                    "dom": "lib.dom.d.ts",
+                    "dom.iterable": "lib.dom.iterable.d.ts",
+                    "webworker": "lib.webworker.d.ts",
+                    "scripthost": "lib.scripthost.d.ts",
+                    // ES2015 Or ESNext By-feature options
+                    "es2015.core": "lib.es2015.core.d.ts",
+                    "es2015.collection": "lib.es2015.collection.d.ts",
+                    "es2015.generator": "lib.es2015.generator.d.ts",
+                    "es2015.iterable": "lib.es2015.iterable.d.ts",
+                    "es2015.promise": "lib.es2015.promise.d.ts",
+                    "es2015.proxy": "lib.es2015.proxy.d.ts",
+                    "es2015.reflect": "lib.es2015.reflect.d.ts",
+                    "es2015.symbol": "lib.es2015.symbol.d.ts",
+                    "es2015.symbol.wellknown": "lib.es2015.symbol.wellknown.d.ts",
+                    "es2016.array.include": "lib.es2016.array.include.d.ts",
+                    "es2017.object": "lib.es2017.object.d.ts",
+                    "es2017.sharedmemory": "lib.es2017.sharedmemory.d.ts",
+                    "es2017.string": "lib.es2017.string.d.ts",
+                    "es2017.intl": "lib.es2017.intl.d.ts",
+                    "esnext.asynciterable": "lib.esnext.asynciterable.d.ts",
+                }),
+            },
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Basic_Options,
+            description: ts.Diagnostics.Specify_library_files_to_be_included_in_the_compilation_Colon
+        },
+        {
+            name: "allowJs",
+            type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Basic_Options,
+            description: ts.Diagnostics.Allow_javascript_files_to_be_compiled
+        },
+        {
+            name: "checkJs",
+            type: "boolean",
+            category: ts.Diagnostics.Basic_Options,
+            description: ts.Diagnostics.Report_errors_in_js_files
+        },
+        {
+            name: "jsx",
+            type: ts.createMapFromTemplate({
+                "preserve": 1 /* Preserve */,
+                "react-native": 3 /* ReactNative */,
+                "react": 2 /* React */
+            }),
+            paramType: ts.Diagnostics.KIND,
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Basic_Options,
+            description: ts.Diagnostics.Specify_JSX_code_generation_Colon_preserve_react_native_or_react,
+        },
+        {
+            name: "declaration",
+            shortName: "d",
+            type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Basic_Options,
+            description: ts.Diagnostics.Generates_corresponding_d_ts_file,
+        },
+        {
+            name: "sourceMap",
+            type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Basic_Options,
+            description: ts.Diagnostics.Generates_corresponding_map_file,
+        },
+        {
+            name: "outFile",
+            type: "string",
+            isFilePath: true,
+            paramType: ts.Diagnostics.FILE,
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Basic_Options,
+            description: ts.Diagnostics.Concatenate_and_emit_output_to_single_file,
+        },
+        {
+            name: "outDir",
+            type: "string",
+            isFilePath: true,
+            paramType: ts.Diagnostics.DIRECTORY,
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Basic_Options,
+            description: ts.Diagnostics.Redirect_output_structure_to_the_directory,
+        },
+        {
+            name: "rootDir",
+            type: "string",
+            isFilePath: true,
+            paramType: ts.Diagnostics.LOCATION,
+            category: ts.Diagnostics.Basic_Options,
+            description: ts.Diagnostics.Specify_the_root_directory_of_input_files_Use_to_control_the_output_directory_structure_with_outDir,
+        },
+        {
+            name: "removeComments",
+            type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Basic_Options,
+            description: ts.Diagnostics.Do_not_emit_comments_to_output,
+        },
+        {
+            name: "noEmit",
+            type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Basic_Options,
+            description: ts.Diagnostics.Do_not_emit_outputs,
+        },
+        {
+            name: "importHelpers",
+            type: "boolean",
+            category: ts.Diagnostics.Basic_Options,
+            description: ts.Diagnostics.Import_emit_helpers_from_tslib
+        },
+        {
+            name: "downlevelIteration",
+            type: "boolean",
+            category: ts.Diagnostics.Basic_Options,
+            description: ts.Diagnostics.Provide_full_support_for_iterables_in_for_of_spread_and_destructuring_when_targeting_ES5_or_ES3
+        },
+        {
+            name: "isolatedModules",
+            type: "boolean",
+            category: ts.Diagnostics.Basic_Options,
+            description: ts.Diagnostics.Transpile_each_file_as_a_separate_module_similar_to_ts_transpileModule
+        },
+        // Strict Type Checks
+        {
+            name: "strict",
+            type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Strict_Type_Checking_Options,
+            description: ts.Diagnostics.Enable_all_strict_type_checking_options
+        },
+        {
+            name: "noImplicitAny",
+            type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Strict_Type_Checking_Options,
+            description: ts.Diagnostics.Raise_error_on_expressions_and_declarations_with_an_implied_any_type,
+        },
+        {
+            name: "strictNullChecks",
+            type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Strict_Type_Checking_Options,
+            description: ts.Diagnostics.Enable_strict_null_checks
+        },
+        {
+            name: "noImplicitThis",
+            type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Strict_Type_Checking_Options,
+            description: ts.Diagnostics.Raise_error_on_this_expressions_with_an_implied_any_type,
+        },
+        {
+            name: "alwaysStrict",
+            type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Strict_Type_Checking_Options,
+            description: ts.Diagnostics.Parse_in_strict_mode_and_emit_use_strict_for_each_source_file
+        },
+        // Additional Checks
+        {
+            name: "noUnusedLocals",
+            type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Additional_Checks,
+            description: ts.Diagnostics.Report_errors_on_unused_locals,
+        },
+        {
+            name: "noUnusedParameters",
+            type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Additional_Checks,
+            description: ts.Diagnostics.Report_errors_on_unused_parameters,
+        },
+        {
+            name: "noImplicitReturns",
+            type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Additional_Checks,
+            description: ts.Diagnostics.Report_error_when_not_all_code_paths_in_function_return_a_value
+        },
+        {
+            name: "noFallthroughCasesInSwitch",
+            type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Additional_Checks,
+            description: ts.Diagnostics.Report_errors_for_fallthrough_cases_in_switch_statement
+        },
+        // Module Resolution
+        {
+            name: "moduleResolution",
+            type: ts.createMapFromTemplate({
+                "node": ts.ModuleResolutionKind.NodeJs,
+                "classic": ts.ModuleResolutionKind.Classic,
+            }),
+            paramType: ts.Diagnostics.STRATEGY,
+            category: ts.Diagnostics.Module_Resolution_Options,
+            description: ts.Diagnostics.Specify_module_resolution_strategy_Colon_node_Node_js_or_classic_TypeScript_pre_1_6,
+        },
+        {
+            name: "baseUrl",
+            type: "string",
+            isFilePath: true,
+            category: ts.Diagnostics.Module_Resolution_Options,
+            description: ts.Diagnostics.Base_directory_to_resolve_non_absolute_module_names
+        },
+        {
+            // this option can only be specified in tsconfig.json
+            // use type = object to copy the value as-is
+            name: "paths",
+            type: "object",
+            isTSConfigOnly: true,
+            category: ts.Diagnostics.Module_Resolution_Options,
+            description: ts.Diagnostics.A_series_of_entries_which_re_map_imports_to_lookup_locations_relative_to_the_baseUrl
+        },
+        {
+            // this option can only be specified in tsconfig.json
+            // use type = object to copy the value as-is
+            name: "rootDirs",
+            type: "list",
+            isTSConfigOnly: true,
+            element: {
+                name: "rootDirs",
+                type: "string",
+                isFilePath: true
+            },
+            category: ts.Diagnostics.Module_Resolution_Options,
+            description: ts.Diagnostics.List_of_root_folders_whose_combined_content_represents_the_structure_of_the_project_at_runtime
+        },
+        {
+            name: "typeRoots",
+            type: "list",
+            element: {
+                name: "typeRoots",
+                type: "string",
+                isFilePath: true
+            },
+            category: ts.Diagnostics.Module_Resolution_Options,
+            description: ts.Diagnostics.List_of_folders_to_include_type_definitions_from
+        },
+        {
+            name: "types",
+            type: "list",
+            element: {
+                name: "types",
+                type: "string"
+            },
+            showInSimplifiedHelpView: true,
+            category: ts.Diagnostics.Module_Resolution_Options,
+            description: ts.Diagnostics.Type_declaration_files_to_be_included_in_compilation
+        },
+        {
+            name: "allowSyntheticDefaultImports",
+            type: "boolean",
+            category: ts.Diagnostics.Module_Resolution_Options,
+            description: ts.Diagnostics.Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typechecking
+        },
+        // Source Maps
+        {
+            name: "sourceRoot",
+            type: "string",
+            isFilePath: true,
+            paramType: ts.Diagnostics.LOCATION,
+            category: ts.Diagnostics.Source_Map_Options,
+            description: ts.Diagnostics.Specify_the_location_where_debugger_should_locate_TypeScript_files_instead_of_source_locations,
+        },
+        {
+            name: "mapRoot",
+            type: "string",
+            isFilePath: true,
+            paramType: ts.Diagnostics.LOCATION,
+            category: ts.Diagnostics.Source_Map_Options,
+            description: ts.Diagnostics.Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations,
+        },
+        {
+            name: "inlineSourceMap",
+            type: "boolean",
+            category: ts.Diagnostics.Source_Map_Options,
+            description: ts.Diagnostics.Emit_a_single_file_with_source_maps_instead_of_having_a_separate_file
+        },
+        {
+            name: "inlineSources",
+            type: "boolean",
+            category: ts.Diagnostics.Source_Map_Options,
+            description: ts.Diagnostics.Emit_the_source_alongside_the_sourcemaps_within_a_single_file_requires_inlineSourceMap_or_sourceMap_to_be_set
+        },
+        // Experimental
+        {
+            name: "experimentalDecorators",
+            type: "boolean",
+            category: ts.Diagnostics.Experimental_Options,
+            description: ts.Diagnostics.Enables_experimental_support_for_ES7_decorators
+        },
+        {
+            name: "emitDecoratorMetadata",
+            type: "boolean",
+            category: ts.Diagnostics.Experimental_Options,
+            description: ts.Diagnostics.Enables_experimental_support_for_emitting_type_metadata_for_decorators
+        },
+        // Advanced
+        {
+            name: "jsxFactory",
+            type: "string",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Specify_the_JSX_factory_function_to_use_when_targeting_react_JSX_emit_e_g_React_createElement_or_h
+        },
+        {
+            name: "diagnostics",
+            type: "boolean",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Show_diagnostic_information
+        },
+        {
+            name: "extendedDiagnostics",
+            type: "boolean",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Show_verbose_diagnostic_information
+        },
+        {
+            name: "traceResolution",
+            type: "boolean",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Enable_tracing_of_the_name_resolution_process
+        },
+        {
+            name: "listFiles",
+            type: "boolean",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Print_names_of_files_part_of_the_compilation
+        },
+        {
+            name: "listEmittedFiles",
+            type: "boolean",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Print_names_of_generated_files_part_of_the_compilation
+        },
+        {
+            name: "out",
+            type: "string",
+            isFilePath: false,
+            // for correct behaviour, please use outFile
+            category: ts.Diagnostics.Advanced_Options,
+            paramType: ts.Diagnostics.FILE,
+            description: ts.Diagnostics.Deprecated_Use_outFile_instead_Concatenate_and_emit_output_to_single_file,
+        },
+        {
+            name: "reactNamespace",
+            type: "string",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Deprecated_Use_jsxFactory_instead_Specify_the_object_invoked_for_createElement_when_targeting_react_JSX_emit
+        },
+        {
+            name: "skipDefaultLibCheck",
+            type: "boolean",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Deprecated_Use_skipLibCheck_instead_Skip_type_checking_of_default_library_declaration_files
+        },
+        {
+            name: "charset",
+            type: "string",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.The_character_set_of_the_input_files
+        },
+        {
+            name: "emitBOM",
+            type: "boolean",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Emit_a_UTF_8_Byte_Order_Mark_BOM_in_the_beginning_of_output_files
+        },
+        {
+            name: "locale",
+            type: "string",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.The_locale_used_when_displaying_messages_to_the_user_e_g_en_us
+        },
+        {
+            name: "newLine",
+            type: ts.createMapFromTemplate({
+                "crlf": 0 /* CarriageReturnLineFeed */,
+                "lf": 1 /* LineFeed */
+            }),
+            paramType: ts.Diagnostics.NEWLINE,
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Specify_the_end_of_line_sequence_to_be_used_when_emitting_files_Colon_CRLF_dos_or_LF_unix,
+        },
+        {
+            name: "noErrorTruncation",
+            type: "boolean",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Do_not_truncate_error_messages
+        },
+        {
+            name: "noLib",
+            type: "boolean",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Do_not_include_the_default_library_file_lib_d_ts
+        },
+        {
+            name: "noResolve",
+            type: "boolean",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Do_not_add_triple_slash_references_or_imported_modules_to_the_list_of_compiled_files
+        },
+        {
+            name: "stripInternal",
+            type: "boolean",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Do_not_emit_declarations_for_code_that_has_an_internal_annotation,
+        },
+        {
+            name: "disableSizeLimit",
+            type: "boolean",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Disable_size_limitations_on_JavaScript_projects
+        },
+        {
+            name: "noImplicitUseStrict",
+            type: "boolean",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Do_not_emit_use_strict_directives_in_module_output
+        },
+        {
+            name: "noEmitHelpers",
+            type: "boolean",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Do_not_generate_custom_helper_functions_like_extends_in_compiled_output
+        },
+        {
+            name: "noEmitOnError",
+            type: "boolean",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Do_not_emit_outputs_if_any_errors_were_reported,
+        },
+        {
+            name: "preserveConstEnums",
+            type: "boolean",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Do_not_erase_const_enum_declarations_in_generated_code
+        },
+        {
+            name: "declarationDir",
+            type: "string",
+            isFilePath: true,
+            paramType: ts.Diagnostics.DIRECTORY,
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Output_directory_for_generated_declaration_files
+        },
+        {
+            name: "skipLibCheck",
+            type: "boolean",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Skip_type_checking_of_declaration_files,
+        },
+        {
+            name: "allowUnusedLabels",
+            type: "boolean",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Do_not_report_errors_on_unused_labels
+        },
+        {
+            name: "allowUnreachableCode",
+            type: "boolean",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Do_not_report_errors_on_unreachable_code
+        },
+        {
+            name: "suppressExcessPropertyErrors",
+            type: "boolean",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Suppress_excess_property_checks_for_object_literals,
+        },
+        {
+            name: "suppressImplicitAnyIndexErrors",
+            type: "boolean",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Suppress_noImplicitAny_errors_for_indexing_objects_lacking_index_signatures,
+        },
+        {
+            name: "forceConsistentCasingInFileNames",
+            type: "boolean",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Disallow_inconsistently_cased_references_to_the_same_file
+        },
+        {
+            name: "maxNodeModuleJsDepth",
+            type: "number",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.The_maximum_dependency_depth_to_search_under_node_modules_and_load_JavaScript_files
+        },
+        {
+            name: "noStrictGenericChecks",
+            type: "boolean",
+            category: ts.Diagnostics.Advanced_Options,
+            description: ts.Diagnostics.Disable_strict_checking_of_generic_signatures_in_function_types,
+        },
+        {
+            // A list of plugins to load in the language service
+            name: "plugins",
+            type: "list",
+            isTSConfigOnly: true,
+            element: {
+                name: "plugin",
+                type: "object"
+            },
+            description: ts.Diagnostics.List_of_language_service_plugins
+        }
+    ];
+    /* @internal */
+    ts.typeAcquisitionDeclarations = [
+        {
+            /* @deprecated typingOptions.enableAutoDiscovery
+             * Use typeAcquisition.enable instead.
+             */
+            name: "enableAutoDiscovery",
+            type: "boolean",
+        },
+        {
+            name: "enable",
+            type: "boolean",
+        },
+        {
+            name: "include",
+            type: "list",
+            element: {
+                name: "include",
+                type: "string"
             }
-            if (node.body) {
-                checkSourceElement(node.body);
-                if (!ts.isGlobalScopeAugmentation(node)) {
-                    registerForUnusedIdentifiersCheck(node);
-                }
+        },
+        {
+            name: "exclude",
+            type: "list",
+            element: {
+                name: "exclude",
+                type: "string"
             }
         }
-        function checkModuleAugmentationElement(node, isGlobalAugmentation) {
-            switch (node.kind) {
-                case 200 /* VariableStatement */:
-                    // error each individual name in variable statement instead of marking the entire variable statement
-                    for (var _i = 0, _a = node.declarationList.declarations; _i < _a.length; _i++) {
-                        var decl = _a[_i];
-                        checkModuleAugmentationElement(decl, isGlobalAugmentation);
-                    }
-                    break;
-                case 235 /* ExportAssignment */:
-                case 236 /* ExportDeclaration */:
-                    grammarErrorOnFirstToken(node, ts.Diagnostics.Exports_and_export_assignments_are_not_permitted_in_module_augmentations);
-                    break;
-                case 229 /* ImportEqualsDeclaration */:
-                case 230 /* ImportDeclaration */:
-                    grammarErrorOnFirstToken(node, ts.Diagnostics.Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_module);
-                    break;
-                case 169 /* BindingElement */:
-                case 218 /* VariableDeclaration */:
-                    var name_22 = node.name;
-                    if (ts.isBindingPattern(name_22)) {
-                        for (var _b = 0, _c = name_22.elements; _b < _c.length; _b++) {
-                            var el = _c[_b];
-                            // mark individual names in binding pattern
-                            checkModuleAugmentationElement(el, isGlobalAugmentation);
-                        }
-                        break;
-                    }
-                // fallthrough
-                case 221 /* ClassDeclaration */:
-                case 224 /* EnumDeclaration */:
-                case 220 /* FunctionDeclaration */:
-                case 222 /* InterfaceDeclaration */:
-                case 225 /* ModuleDeclaration */:
-                case 223 /* TypeAliasDeclaration */:
-                    if (isGlobalAugmentation) {
-                        return;
-                    }
-                    var symbol = getSymbolOfNode(node);
-                    if (symbol) {
-                        // module augmentations cannot introduce new names on the top level scope of the module
-                        // this is done it two steps
-                        // 1. quick check - if symbol for node is not merged - this is local symbol to this augmentation - report error
-                        // 2. main check - report error if value declaration of the parent symbol is module augmentation)
-                        var reportError = !(symbol.flags & 33554432 /* Merged */);
-                        if (!reportError) {
-                            // symbol should not originate in augmentation
-                            reportError = ts.isExternalModuleAugmentation(symbol.parent.declarations[0]);
-                        }
-                    }
-                    break;
-            }
+    ];
+    /* @internal */
+    ts.defaultInitCompilerOptions = {
+        module: ts.ModuleKind.CommonJS,
+        target: 1 /* ES5 */,
+        strict: true
+    };
+    var optionNameMapCache;
+    /* @internal */
+    function convertEnableAutoDiscoveryToEnable(typeAcquisition) {
+        // Convert deprecated typingOptions.enableAutoDiscovery to typeAcquisition.enable
+        if (typeAcquisition && typeAcquisition.enableAutoDiscovery !== undefined && typeAcquisition.enable === undefined) {
+            var result = {
+                enable: typeAcquisition.enableAutoDiscovery,
+                include: typeAcquisition.include || [],
+                exclude: typeAcquisition.exclude || []
+            };
+            return result;
         }
-        function getFirstIdentifier(node) {
-            switch (node.kind) {
-                case 69 /* Identifier */:
-                    return node;
-                case 139 /* QualifiedName */:
-                    do {
-                        node = node.left;
-                    } while (node.kind !== 69 /* Identifier */);
-                    return node;
-                case 172 /* PropertyAccessExpression */:
-                    do {
-                        node = node.expression;
-                    } while (node.kind !== 69 /* Identifier */);
-                    return node;
-            }
+        return typeAcquisition;
+    }
+    ts.convertEnableAutoDiscoveryToEnable = convertEnableAutoDiscoveryToEnable;
+    function getOptionNameMap() {
+        if (optionNameMapCache) {
+            return optionNameMapCache;
         }
-        function checkExternalImportOrExportDeclaration(node) {
-            var moduleName = ts.getExternalModuleName(node);
-            if (!ts.nodeIsMissing(moduleName) && moduleName.kind !== 9 /* StringLiteral */) {
-                error(moduleName, ts.Diagnostics.String_literal_expected);
-                return false;
-            }
-            var inAmbientExternalModule = node.parent.kind === 226 /* ModuleBlock */ && ts.isAmbientModule(node.parent.parent);
-            if (node.parent.kind !== 256 /* SourceFile */ && !inAmbientExternalModule) {
-                error(moduleName, node.kind === 236 /* ExportDeclaration */ ?
-                    ts.Diagnostics.Export_declarations_are_not_permitted_in_a_namespace :
-                    ts.Diagnostics.Import_declarations_in_a_namespace_cannot_reference_a_module);
-                return false;
-            }
-            if (inAmbientExternalModule && ts.isExternalModuleNameRelative(moduleName.text)) {
-                // we have already reported errors on top level imports\exports in external module augmentations in checkModuleDeclaration
-                // no need to do this again.
-                if (!isTopLevelInExternalModuleAugmentation(node)) {
-                    // TypeScript 1.0 spec (April 2013): 12.1.6
-                    // An ExternalImportDeclaration in an AmbientExternalModuleDeclaration may reference
-                    // other external modules only through top - level external module names.
-                    // Relative external module names are not permitted.
-                    error(node, ts.Diagnostics.Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relative_module_name);
-                    return false;
-                }
+        var optionNameMap = ts.createMap();
+        var shortOptionNames = ts.createMap();
+        ts.forEach(ts.optionDeclarations, function (option) {
+            optionNameMap.set(option.name.toLowerCase(), option);
+            if (option.shortName) {
+                shortOptionNames.set(option.shortName, option.name);
             }
-            return true;
+        });
+        optionNameMapCache = { optionNameMap: optionNameMap, shortOptionNames: shortOptionNames };
+        return optionNameMapCache;
+    }
+    /* @internal */
+    function createCompilerDiagnosticForInvalidCustomType(opt) {
+        return createDiagnosticForInvalidCustomType(opt, ts.createCompilerDiagnostic);
+    }
+    ts.createCompilerDiagnosticForInvalidCustomType = createCompilerDiagnosticForInvalidCustomType;
+    function createDiagnosticForInvalidCustomType(opt, createDiagnostic) {
+        var namesOfType = ts.arrayFrom(opt.type.keys()).map(function (key) { return "'" + key + "'"; }).join(", ");
+        return createDiagnostic(ts.Diagnostics.Argument_for_0_option_must_be_Colon_1, "--" + opt.name, namesOfType);
+    }
+    /* @internal */
+    function parseCustomTypeOption(opt, value, errors) {
+        return convertJsonOptionOfCustomType(opt, trimString(value || ""), errors);
+    }
+    ts.parseCustomTypeOption = parseCustomTypeOption;
+    /* @internal */
+    function parseListTypeOption(opt, value, errors) {
+        if (value === void 0) { value = ""; }
+        value = trimString(value);
+        if (ts.startsWith(value, "-")) {
+            return undefined;
         }
-        function checkAliasSymbol(node) {
-            var symbol = getSymbolOfNode(node);
-            var target = resolveAlias(symbol);
-            if (target !== unknownSymbol) {
-                // For external modules symbol represent local symbol for an alias.
-                // This local symbol will merge any other local declarations (excluding other aliases)
-                // and symbol.flags will contains combined representation for all merged declaration.
-                // Based on symbol.flags we can compute a set of excluded meanings (meaning that resolved alias should not have,
-                // otherwise it will conflict with some local declaration). Note that in addition to normal flags we include matching SymbolFlags.Export*
-                // in order to prevent collisions with declarations that were exported from the current module (they still contribute to local names).
-                var excludedMeanings = (symbol.flags & (107455 /* Value */ | 1048576 /* ExportValue */) ? 107455 /* Value */ : 0) |
-                    (symbol.flags & 793064 /* Type */ ? 793064 /* Type */ : 0) |
-                    (symbol.flags & 1920 /* Namespace */ ? 1920 /* Namespace */ : 0);
-                if (target.flags & excludedMeanings) {
-                    var message = node.kind === 238 /* ExportSpecifier */ ?
-                        ts.Diagnostics.Export_declaration_conflicts_with_exported_declaration_of_0 :
-                        ts.Diagnostics.Import_declaration_conflicts_with_local_declaration_of_0;
-                    error(node, message, symbolToString(symbol));
-                }
-            }
+        if (value === "") {
+            return [];
         }
-        function checkImportBinding(node) {
-            checkCollisionWithCapturedThisVariable(node, node.name);
-            checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
-            checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
-            checkAliasSymbol(node);
+        var values = value.split(",");
+        switch (opt.element.type) {
+            case "number":
+                return ts.map(values, parseInt);
+            case "string":
+                return ts.map(values, function (v) { return v || ""; });
+            default:
+                return ts.filter(ts.map(values, function (v) { return parseCustomTypeOption(opt.element, v, errors); }), function (v) { return !!v; });
         }
-        function checkImportDeclaration(node) {
-            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_import_declaration_can_only_be_used_in_a_namespace_or_module)) {
-                // If we hit an import declaration in an illegal context, just bail out to avoid cascading errors.
-                return;
-            }
-            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && ts.getModifierFlags(node) !== 0) {
-                grammarErrorOnFirstToken(node, ts.Diagnostics.An_import_declaration_cannot_have_modifiers);
-            }
-            if (checkExternalImportOrExportDeclaration(node)) {
-                var importClause = node.importClause;
-                if (importClause) {
-                    if (importClause.name) {
-                        checkImportBinding(importClause);
-                    }
-                    if (importClause.namedBindings) {
-                        if (importClause.namedBindings.kind === 232 /* NamespaceImport */) {
-                            checkImportBinding(importClause.namedBindings);
+    }
+    ts.parseListTypeOption = parseListTypeOption;
+    function parseCommandLine(commandLine, readFile) {
+        var options = {};
+        var fileNames = [];
+        var errors = [];
+        parseStrings(commandLine);
+        return {
+            options: options,
+            fileNames: fileNames,
+            errors: errors
+        };
+        function parseStrings(args) {
+            var i = 0;
+            while (i < args.length) {
+                var s = args[i];
+                i++;
+                if (s.charCodeAt(0) === 64 /* at */) {
+                    parseResponseFile(s.slice(1));
+                }
+                else if (s.charCodeAt(0) === 45 /* minus */) {
+                    var opt = getOptionFromName(s.slice(s.charCodeAt(1) === 45 /* minus */ ? 2 : 1), /*allowShort*/ true);
+                    if (opt) {
+                        if (opt.isTSConfigOnly) {
+                            errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_can_only_be_specified_in_tsconfig_json_file, opt.name));
                         }
                         else {
-                            ts.forEach(importClause.namedBindings.elements, checkImportBinding);
-                        }
-                    }
-                }
-            }
-        }
-        function checkImportEqualsDeclaration(node) {
-            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_import_declaration_can_only_be_used_in_a_namespace_or_module)) {
-                // If we hit an import declaration in an illegal context, just bail out to avoid cascading errors.
-                return;
-            }
-            checkGrammarDecorators(node) || checkGrammarModifiers(node);
-            if (ts.isInternalModuleImportEqualsDeclaration(node) || checkExternalImportOrExportDeclaration(node)) {
-                checkImportBinding(node);
-                if (ts.getModifierFlags(node) & 1 /* Export */) {
-                    markExportAsReferenced(node);
-                }
-                if (ts.isInternalModuleImportEqualsDeclaration(node)) {
-                    var target = resolveAlias(getSymbolOfNode(node));
-                    if (target !== unknownSymbol) {
-                        if (target.flags & 107455 /* Value */) {
-                            // Target is a value symbol, check that it is not hidden by a local declaration with the same name
-                            var moduleName = getFirstIdentifier(node.moduleReference);
-                            if (!(resolveEntityName(moduleName, 107455 /* Value */ | 1920 /* Namespace */).flags & 1920 /* Namespace */)) {
-                                error(moduleName, ts.Diagnostics.Module_0_is_hidden_by_a_local_declaration_with_the_same_name, ts.declarationNameToString(moduleName));
+                            // Check to see if no argument was provided (e.g. "--locale" is the last command-line argument).
+                            if (!args[i] && opt.type !== "boolean") {
+                                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_expects_an_argument, opt.name));
                             }
-                        }
-                        if (target.flags & 793064 /* Type */) {
-                            checkTypeNameIsReserved(node.name, ts.Diagnostics.Import_name_cannot_be_0);
-                        }
-                    }
-                }
-                else {
-                    if (modulekind === ts.ModuleKind.ES6 && !ts.isInAmbientContext(node)) {
-                        // Import equals declaration is deprecated in es6 or above
-                        grammarErrorOnNode(node, ts.Diagnostics.Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead);
-                    }
-                }
-            }
-        }
-        function checkExportDeclaration(node) {
-            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_export_declaration_can_only_be_used_in_a_module)) {
-                // If we hit an export in an illegal context, just bail out to avoid cascading errors.
-                return;
-            }
-            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && ts.getModifierFlags(node) !== 0) {
-                grammarErrorOnFirstToken(node, ts.Diagnostics.An_export_declaration_cannot_have_modifiers);
-            }
-            if (!node.moduleSpecifier || checkExternalImportOrExportDeclaration(node)) {
-                if (node.exportClause) {
-                    // export { x, y }
-                    // export { x, y } from "foo"
-                    ts.forEach(node.exportClause.elements, checkExportSpecifier);
-                    var inAmbientExternalModule = node.parent.kind === 226 /* ModuleBlock */ && ts.isAmbientModule(node.parent.parent);
-                    if (node.parent.kind !== 256 /* SourceFile */ && !inAmbientExternalModule) {
-                        error(node, ts.Diagnostics.Export_declarations_are_not_permitted_in_a_namespace);
-                    }
-                }
-                else {
-                    // export * from "foo"
-                    var moduleSymbol = resolveExternalModuleName(node, node.moduleSpecifier);
-                    if (moduleSymbol && hasExportAssignmentSymbol(moduleSymbol)) {
-                        error(node.moduleSpecifier, ts.Diagnostics.Module_0_uses_export_and_cannot_be_used_with_export_Asterisk, symbolToString(moduleSymbol));
-                    }
-                }
-            }
-        }
-        function checkGrammarModuleElementContext(node, errorMessage) {
-            var isInAppropriateContext = node.parent.kind === 256 /* SourceFile */ || node.parent.kind === 226 /* ModuleBlock */ || node.parent.kind === 225 /* ModuleDeclaration */;
-            if (!isInAppropriateContext) {
-                grammarErrorOnFirstToken(node, errorMessage);
-            }
-            return !isInAppropriateContext;
-        }
-        function checkExportSpecifier(node) {
-            checkAliasSymbol(node);
-            if (!node.parent.parent.moduleSpecifier) {
-                var exportedName = node.propertyName || node.name;
-                // find immediate value referenced by exported name (SymbolFlags.Alias is set so we don't chase down aliases)
-                var symbol = resolveName(exportedName, exportedName.text, 107455 /* Value */ | 793064 /* Type */ | 1920 /* Namespace */ | 8388608 /* Alias */, 
-                /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined);
-                if (symbol && (symbol === undefinedSymbol || isGlobalSourceFile(getDeclarationContainer(symbol.declarations[0])))) {
-                    error(exportedName, ts.Diagnostics.Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module, exportedName.text);
-                }
-                else {
-                    markExportAsReferenced(node);
-                }
-            }
-        }
-        function checkExportAssignment(node) {
-            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_export_assignment_can_only_be_used_in_a_module)) {
-                // If we hit an export assignment in an illegal context, just bail out to avoid cascading errors.
-                return;
-            }
-            var container = node.parent.kind === 256 /* SourceFile */ ? node.parent : node.parent.parent;
-            if (container.kind === 225 /* ModuleDeclaration */ && !ts.isAmbientModule(container)) {
-                error(node, ts.Diagnostics.An_export_assignment_cannot_be_used_in_a_namespace);
-                return;
-            }
-            // Grammar checking
-            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && ts.getModifierFlags(node) !== 0) {
-                grammarErrorOnFirstToken(node, ts.Diagnostics.An_export_assignment_cannot_have_modifiers);
-            }
-            if (node.expression.kind === 69 /* Identifier */) {
-                markExportAsReferenced(node);
-            }
-            else {
-                checkExpressionCached(node.expression);
-            }
-            checkExternalModuleExports(container);
-            if (node.isExportEquals && !ts.isInAmbientContext(node)) {
-                if (modulekind === ts.ModuleKind.ES6) {
-                    // export assignment is not supported in es6 modules
-                    grammarErrorOnNode(node, ts.Diagnostics.Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_or_another_module_format_instead);
-                }
-                else if (modulekind === ts.ModuleKind.System) {
-                    // system modules does not support export assignment
-                    grammarErrorOnNode(node, ts.Diagnostics.Export_assignment_is_not_supported_when_module_flag_is_system);
-                }
-            }
-        }
-        function hasExportedMembers(moduleSymbol) {
-            for (var id in moduleSymbol.exports) {
-                if (id !== "export=") {
-                    return true;
-                }
-            }
-            return false;
-        }
-        function checkExternalModuleExports(node) {
-            var moduleSymbol = getSymbolOfNode(node);
-            var links = getSymbolLinks(moduleSymbol);
-            if (!links.exportsChecked) {
-                var exportEqualsSymbol = moduleSymbol.exports["export="];
-                if (exportEqualsSymbol && hasExportedMembers(moduleSymbol)) {
-                    var declaration = getDeclarationOfAliasSymbol(exportEqualsSymbol) || exportEqualsSymbol.valueDeclaration;
-                    if (!isTopLevelInExternalModuleAugmentation(declaration)) {
-                        error(declaration, ts.Diagnostics.An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements);
-                    }
-                }
-                // Checks for export * conflicts
-                var exports = getExportsOfModule(moduleSymbol);
-                for (var id in exports) {
-                    if (id === "__export") {
-                        continue;
-                    }
-                    var _a = exports[id], declarations = _a.declarations, flags = _a.flags;
-                    // ECMA262: 15.2.1.1 It is a Syntax Error if the ExportedNames of ModuleItemList contains any duplicate entries.
-                    // (TS Exceptions: namespaces, function overloads, enums, and interfaces)
-                    if (flags & (1920 /* Namespace */ | 64 /* Interface */ | 384 /* Enum */)) {
-                        continue;
-                    }
-                    var exportedDeclarationsCount = ts.countWhere(declarations, isNotOverload);
-                    if (flags & 524288 /* TypeAlias */ && exportedDeclarationsCount <= 2) {
-                        // it is legal to merge type alias with other values
-                        // so count should be either 1 (just type alias) or 2 (type alias + merged value)
-                        continue;
-                    }
-                    if (exportedDeclarationsCount > 1) {
-                        for (var _i = 0, declarations_6 = declarations; _i < declarations_6.length; _i++) {
-                            var declaration = declarations_6[_i];
-                            if (isNotOverload(declaration)) {
-                                diagnostics.add(ts.createDiagnosticForNode(declaration, ts.Diagnostics.Cannot_redeclare_exported_variable_0, id));
+                            switch (opt.type) {
+                                case "number":
+                                    options[opt.name] = parseInt(args[i]);
+                                    i++;
+                                    break;
+                                case "boolean":
+                                    // boolean flag has optional value true, false, others
+                                    var optValue = args[i];
+                                    options[opt.name] = optValue !== "false";
+                                    // consume next argument as boolean flag value
+                                    if (optValue === "false" || optValue === "true") {
+                                        i++;
+                                    }
+                                    break;
+                                case "string":
+                                    options[opt.name] = args[i] || "";
+                                    i++;
+                                    break;
+                                case "list":
+                                    var result = parseListTypeOption(opt, args[i], errors);
+                                    options[opt.name] = result || [];
+                                    if (result) {
+                                        i++;
+                                    }
+                                    break;
+                                // If not a primitive, the possible types are specified in what is effectively a map of options.
+                                default:
+                                    options[opt.name] = parseCustomTypeOption(opt, args[i], errors);
+                                    i++;
+                                    break;
                             }
-                        }
-                    }
-                }
-                links.exportsChecked = true;
-            }
-            function isNotOverload(declaration) {
-                return declaration.kind !== 220 /* FunctionDeclaration */ || !!declaration.body;
-            }
-        }
-        function checkSourceElement(node) {
-            if (!node) {
-                return;
-            }
-            var kind = node.kind;
-            if (cancellationToken) {
-                // Only bother checking on a few construct kinds.  We don't want to be excessively
-                // hitting the cancellation token on every node we check.
-                switch (kind) {
-                    case 225 /* ModuleDeclaration */:
-                    case 221 /* ClassDeclaration */:
-                    case 222 /* InterfaceDeclaration */:
-                    case 220 /* FunctionDeclaration */:
-                        cancellationToken.throwIfCancellationRequested();
-                }
-            }
-            switch (kind) {
-                case 141 /* TypeParameter */:
-                    return checkTypeParameter(node);
-                case 142 /* Parameter */:
-                    return checkParameter(node);
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
-                    return checkPropertyDeclaration(node);
-                case 156 /* FunctionType */:
-                case 157 /* ConstructorType */:
-                case 151 /* CallSignature */:
-                case 152 /* ConstructSignature */:
-                    return checkSignatureDeclaration(node);
-                case 153 /* IndexSignature */:
-                    return checkSignatureDeclaration(node);
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                    return checkMethodDeclaration(node);
-                case 148 /* Constructor */:
-                    return checkConstructorDeclaration(node);
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                    return checkAccessorDeclaration(node);
-                case 155 /* TypeReference */:
-                    return checkTypeReferenceNode(node);
-                case 154 /* TypePredicate */:
-                    return checkTypePredicate(node);
-                case 158 /* TypeQuery */:
-                    return checkTypeQuery(node);
-                case 159 /* TypeLiteral */:
-                    return checkTypeLiteral(node);
-                case 160 /* ArrayType */:
-                    return checkArrayType(node);
-                case 161 /* TupleType */:
-                    return checkTupleType(node);
-                case 162 /* UnionType */:
-                case 163 /* IntersectionType */:
-                    return checkUnionOrIntersectionType(node);
-                case 164 /* ParenthesizedType */:
-                    return checkSourceElement(node.type);
-                case 220 /* FunctionDeclaration */:
-                    return checkFunctionDeclaration(node);
-                case 199 /* Block */:
-                case 226 /* ModuleBlock */:
-                    return checkBlock(node);
-                case 200 /* VariableStatement */:
-                    return checkVariableStatement(node);
-                case 202 /* ExpressionStatement */:
-                    return checkExpressionStatement(node);
-                case 203 /* IfStatement */:
-                    return checkIfStatement(node);
-                case 204 /* DoStatement */:
-                    return checkDoStatement(node);
-                case 205 /* WhileStatement */:
-                    return checkWhileStatement(node);
-                case 206 /* ForStatement */:
-                    return checkForStatement(node);
-                case 207 /* ForInStatement */:
-                    return checkForInStatement(node);
-                case 208 /* ForOfStatement */:
-                    return checkForOfStatement(node);
-                case 209 /* ContinueStatement */:
-                case 210 /* BreakStatement */:
-                    return checkBreakOrContinueStatement(node);
-                case 211 /* ReturnStatement */:
-                    return checkReturnStatement(node);
-                case 212 /* WithStatement */:
-                    return checkWithStatement(node);
-                case 213 /* SwitchStatement */:
-                    return checkSwitchStatement(node);
-                case 214 /* LabeledStatement */:
-                    return checkLabeledStatement(node);
-                case 215 /* ThrowStatement */:
-                    return checkThrowStatement(node);
-                case 216 /* TryStatement */:
-                    return checkTryStatement(node);
-                case 218 /* VariableDeclaration */:
-                    return checkVariableDeclaration(node);
-                case 169 /* BindingElement */:
-                    return checkBindingElement(node);
-                case 221 /* ClassDeclaration */:
-                    return checkClassDeclaration(node);
-                case 222 /* InterfaceDeclaration */:
-                    return checkInterfaceDeclaration(node);
-                case 223 /* TypeAliasDeclaration */:
-                    return checkTypeAliasDeclaration(node);
-                case 224 /* EnumDeclaration */:
-                    return checkEnumDeclaration(node);
-                case 225 /* ModuleDeclaration */:
-                    return checkModuleDeclaration(node);
-                case 230 /* ImportDeclaration */:
-                    return checkImportDeclaration(node);
-                case 229 /* ImportEqualsDeclaration */:
-                    return checkImportEqualsDeclaration(node);
-                case 236 /* ExportDeclaration */:
-                    return checkExportDeclaration(node);
-                case 235 /* ExportAssignment */:
-                    return checkExportAssignment(node);
-                case 201 /* EmptyStatement */:
-                    checkGrammarStatementInAmbientContext(node);
-                    return;
-                case 217 /* DebuggerStatement */:
-                    checkGrammarStatementInAmbientContext(node);
-                    return;
-                case 239 /* MissingDeclaration */:
-                    return checkMissingDeclaration(node);
-            }
-        }
-        // Function and class expression bodies are checked after all statements in the enclosing body. This is
-        // to ensure constructs like the following are permitted:
-        //     const foo = function () {
-        //        const s = foo();
-        //        return "hello";
-        //     }
-        // Here, performing a full type check of the body of the function expression whilst in the process of
-        // determining the type of foo would cause foo to be given type any because of the recursive reference.
-        // Delaying the type check of the body ensures foo has been assigned a type.
-        function checkNodeDeferred(node) {
-            if (deferredNodes) {
-                deferredNodes.push(node);
-            }
-        }
-        function checkDeferredNodes() {
-            for (var _i = 0, deferredNodes_1 = deferredNodes; _i < deferredNodes_1.length; _i++) {
-                var node = deferredNodes_1[_i];
-                switch (node.kind) {
-                    case 179 /* FunctionExpression */:
-                    case 180 /* ArrowFunction */:
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                        checkFunctionExpressionOrObjectLiteralMethodDeferred(node);
-                        break;
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                        checkAccessorDeferred(node);
-                        break;
-                    case 192 /* ClassExpression */:
-                        checkClassExpressionDeferred(node);
-                        break;
-                }
-            }
-        }
-        function checkSourceFile(node) {
-            ts.performance.mark("beforeCheck");
-            checkSourceFileWorker(node);
-            ts.performance.mark("afterCheck");
-            ts.performance.measure("Check", "beforeCheck", "afterCheck");
-        }
-        // Fully type check a source file and collect the relevant diagnostics.
-        function checkSourceFileWorker(node) {
-            var links = getNodeLinks(node);
-            if (!(links.flags & 1 /* TypeChecked */)) {
-                // If skipLibCheck is enabled, skip type checking if file is a declaration file.
-                // If skipDefaultLibCheck is enabled, skip type checking if file contains a
-                // '/// <reference no-default-lib="true"/>' directive.
-                if (compilerOptions.skipLibCheck && node.isDeclarationFile || compilerOptions.skipDefaultLibCheck && node.hasNoDefaultLib) {
-                    return;
-                }
-                // Grammar checking
-                checkGrammarSourceFile(node);
-                potentialThisCollisions.length = 0;
-                deferredNodes = [];
-                deferredUnusedIdentifierNodes = produceDiagnostics && noUnusedIdentifiers ? [] : undefined;
-                ts.forEach(node.statements, checkSourceElement);
-                checkDeferredNodes();
-                if (ts.isExternalModule(node)) {
-                    registerForUnusedIdentifiersCheck(node);
-                }
-                if (!node.isDeclarationFile) {
-                    checkUnusedIdentifiers();
-                }
-                deferredNodes = undefined;
-                deferredUnusedIdentifierNodes = undefined;
-                if (ts.isExternalOrCommonJsModule(node)) {
-                    checkExternalModuleExports(node);
+                        }
+                    }
+                    else {
+                        errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unknown_compiler_option_0, s));
+                    }
                 }
-                if (potentialThisCollisions.length) {
-                    ts.forEach(potentialThisCollisions, checkIfThisIsCapturedInEnclosingScope);
-                    potentialThisCollisions.length = 0;
+                else {
+                    fileNames.push(s);
                 }
-                links.flags |= 1 /* TypeChecked */;
             }
         }
-        function getDiagnostics(sourceFile, ct) {
-            try {
-                // Record the cancellation token so it can be checked later on during checkSourceElement.
-                // Do this in a finally block so we can ensure that it gets reset back to nothing after
-                // this call is done.
-                cancellationToken = ct;
-                return getDiagnosticsWorker(sourceFile);
+        function parseResponseFile(fileName) {
+            var text = readFile ? readFile(fileName) : ts.sys.readFile(fileName);
+            if (!text) {
+                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.File_0_not_found, fileName));
+                return;
             }
-            finally {
-                cancellationToken = undefined;
+            var args = [];
+            var pos = 0;
+            while (true) {
+                while (pos < text.length && text.charCodeAt(pos) <= 32 /* space */)
+                    pos++;
+                if (pos >= text.length)
+                    break;
+                var start = pos;
+                if (text.charCodeAt(start) === 34 /* doubleQuote */) {
+                    pos++;
+                    while (pos < text.length && text.charCodeAt(pos) !== 34 /* doubleQuote */)
+                        pos++;
+                    if (pos < text.length) {
+                        args.push(text.substring(start + 1, pos));
+                        pos++;
+                    }
+                    else {
+                        errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unterminated_quoted_string_in_response_file_0, fileName));
+                    }
+                }
+                else {
+                    while (text.charCodeAt(pos) > 32 /* space */)
+                        pos++;
+                    args.push(text.substring(start, pos));
+                }
             }
+            parseStrings(args);
         }
-        function getDiagnosticsWorker(sourceFile) {
-            throwIfNonDiagnosticsProducing();
-            if (sourceFile) {
-                checkSourceFile(sourceFile);
-                return diagnostics.getDiagnostics(sourceFile.fileName);
+    }
+    ts.parseCommandLine = parseCommandLine;
+    function getOptionFromName(optionName, allowShort) {
+        if (allowShort === void 0) { allowShort = false; }
+        optionName = optionName.toLowerCase();
+        var _a = getOptionNameMap(), optionNameMap = _a.optionNameMap, shortOptionNames = _a.shortOptionNames;
+        // Try to translate short option names to their full equivalents.
+        if (allowShort) {
+            var short = shortOptionNames.get(optionName);
+            if (short !== undefined) {
+                optionName = short;
             }
-            ts.forEach(host.getSourceFiles(), checkSourceFile);
-            return diagnostics.getDiagnostics();
         }
-        function getGlobalDiagnostics() {
-            throwIfNonDiagnosticsProducing();
-            return diagnostics.getGlobalDiagnostics();
+        return optionNameMap.get(optionName);
+    }
+    /**
+     * Read tsconfig.json file
+     * @param fileName The path to the config file
+     */
+    function readConfigFile(fileName, readFile) {
+        var text = "";
+        try {
+            text = readFile(fileName);
         }
-        function throwIfNonDiagnosticsProducing() {
-            if (!produceDiagnostics) {
-                throw new Error("Trying to get diagnostics from a type checker that does not produce them.");
-            }
+        catch (e) {
+            return { config: {}, error: ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_read_file_0_Colon_1, fileName, e.message) };
         }
-        // Language service support
-        function isInsideWithStatementBody(node) {
-            if (node) {
-                while (node.parent) {
-                    if (node.parent.kind === 212 /* WithStatement */ && node.parent.statement === node) {
-                        return true;
-                    }
-                    node = node.parent;
-                }
-            }
-            return false;
+        return parseConfigFileTextToJson(fileName, text);
+    }
+    ts.readConfigFile = readConfigFile;
+    /**
+     * Parse the text of the tsconfig.json file
+     * @param fileName The path to the config file
+     * @param jsonText The text of the config file
+     */
+    function parseConfigFileTextToJson(fileName, jsonText) {
+        var jsonSourceFile = ts.parseJsonText(fileName, jsonText);
+        return {
+            config: convertToObject(jsonSourceFile, jsonSourceFile.parseDiagnostics),
+            error: jsonSourceFile.parseDiagnostics.length ? jsonSourceFile.parseDiagnostics[0] : undefined
+        };
+    }
+    ts.parseConfigFileTextToJson = parseConfigFileTextToJson;
+    /**
+     * Read tsconfig.json file
+     * @param fileName The path to the config file
+     */
+    function readJsonConfigFile(fileName, readFile) {
+        var text = "";
+        try {
+            text = readFile(fileName);
         }
-        function getSymbolsInScope(location, meaning) {
-            var symbols = ts.createMap();
-            var memberFlags = 0 /* None */;
-            if (isInsideWithStatementBody(location)) {
-                // We cannot answer semantic questions within a with block, do not proceed any further
-                return [];
-            }
-            populateSymbols();
-            return symbolsToArray(symbols);
-            function populateSymbols() {
-                while (location) {
-                    if (location.locals && !isGlobalSourceFile(location)) {
-                        copySymbols(location.locals, meaning);
-                    }
-                    switch (location.kind) {
-                        case 256 /* SourceFile */:
-                            if (!ts.isExternalOrCommonJsModule(location)) {
-                                break;
-                            }
-                        case 225 /* ModuleDeclaration */:
-                            copySymbols(getSymbolOfNode(location).exports, meaning & 8914931 /* ModuleMember */);
-                            break;
-                        case 224 /* EnumDeclaration */:
-                            copySymbols(getSymbolOfNode(location).exports, meaning & 8 /* EnumMember */);
-                            break;
-                        case 192 /* ClassExpression */:
-                            var className = location.name;
-                            if (className) {
-                                copySymbol(location.symbol, meaning);
-                            }
-                        // fall through; this fall-through is necessary because we would like to handle
-                        // type parameter inside class expression similar to how we handle it in classDeclaration and interface Declaration
-                        case 221 /* ClassDeclaration */:
-                        case 222 /* InterfaceDeclaration */:
-                            // If we didn't come from static member of class or interface,
-                            // add the type parameters into the symbol table
-                            // (type parameters of classDeclaration/classExpression and interface are in member property of the symbol.
-                            // Note: that the memberFlags come from previous iteration.
-                            if (!(memberFlags & 32 /* Static */)) {
-                                copySymbols(getSymbolOfNode(location).members, meaning & 793064 /* Type */);
-                            }
-                            break;
-                        case 179 /* FunctionExpression */:
-                            var funcName = location.name;
-                            if (funcName) {
-                                copySymbol(location.symbol, meaning);
-                            }
-                            break;
+        catch (e) {
+            return { parseDiagnostics: [ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_read_file_0_Colon_1, fileName, e.message)] };
+        }
+        return ts.parseJsonText(fileName, text);
+    }
+    ts.readJsonConfigFile = readJsonConfigFile;
+    function commandLineOptionsToMap(options) {
+        return ts.arrayToMap(options, function (option) { return option.name; });
+    }
+    var _tsconfigRootOptions;
+    function getTsconfigRootOptionsMap() {
+        if (_tsconfigRootOptions === undefined) {
+            _tsconfigRootOptions = commandLineOptionsToMap([
+                {
+                    name: "compilerOptions",
+                    type: "object",
+                    elementOptions: commandLineOptionsToMap(ts.optionDeclarations),
+                    extraKeyDiagnosticMessage: ts.Diagnostics.Unknown_compiler_option_0
+                },
+                {
+                    name: "typingOptions",
+                    type: "object",
+                    elementOptions: commandLineOptionsToMap(ts.typeAcquisitionDeclarations),
+                    extraKeyDiagnosticMessage: ts.Diagnostics.Unknown_type_acquisition_option_0
+                },
+                {
+                    name: "typeAcquisition",
+                    type: "object",
+                    elementOptions: commandLineOptionsToMap(ts.typeAcquisitionDeclarations),
+                    extraKeyDiagnosticMessage: ts.Diagnostics.Unknown_type_acquisition_option_0
+                },
+                {
+                    name: "extends",
+                    type: "string"
+                },
+                {
+                    name: "files",
+                    type: "list",
+                    element: {
+                        name: "files",
+                        type: "string"
                     }
-                    if (ts.introducesArgumentsExoticObject(location)) {
-                        copySymbol(argumentsSymbol, meaning);
+                },
+                {
+                    name: "include",
+                    type: "list",
+                    element: {
+                        name: "include",
+                        type: "string"
                     }
-                    memberFlags = ts.getModifierFlags(location);
-                    location = location.parent;
-                }
-                copySymbols(globals, meaning);
-            }
-            /**
-             * Copy the given symbol into symbol tables if the symbol has the given meaning
-             * and it doesn't already existed in the symbol table
-             * @param key a key for storing in symbol table; if undefined, use symbol.name
-             * @param symbol the symbol to be added into symbol table
-             * @param meaning meaning of symbol to filter by before adding to symbol table
-             */
-            function copySymbol(symbol, meaning) {
-                if (symbol.flags & meaning) {
-                    var id = symbol.name;
-                    // We will copy all symbol regardless of its reserved name because
-                    // symbolsToArray will check whether the key is a reserved name and
-                    // it will not copy symbol with reserved name to the array
-                    if (!symbols[id]) {
-                        symbols[id] = symbol;
+                },
+                {
+                    name: "exclude",
+                    type: "list",
+                    element: {
+                        name: "exclude",
+                        type: "string"
                     }
+                },
+                ts.compileOnSaveCommandLineOption
+            ]);
+        }
+        return _tsconfigRootOptions;
+    }
+    /**
+     * Convert the json syntax tree into the json value
+     */
+    function convertToObject(sourceFile, errors) {
+        return convertToObjectWorker(sourceFile, errors, /*knownRootOptions*/ undefined, /*jsonConversionNotifier*/ undefined);
+    }
+    ts.convertToObject = convertToObject;
+    /**
+     * Convert the json syntax tree into the json value
+     */
+    function convertToObjectWorker(sourceFile, errors, knownRootOptions, jsonConversionNotifier) {
+        if (!sourceFile.jsonObject) {
+            return {};
+        }
+        return convertObjectLiteralExpressionToJson(sourceFile.jsonObject, knownRootOptions, 
+        /*extraKeyDiagnosticMessage*/ undefined, /*parentOption*/ undefined);
+        function convertObjectLiteralExpressionToJson(node, knownOptions, extraKeyDiagnosticMessage, parentOption) {
+            var result = {};
+            for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
+                var element = _a[_i];
+                if (element.kind !== 261 /* PropertyAssignment */) {
+                    errors.push(ts.createDiagnosticForNodeInSourceFile(sourceFile, element, ts.Diagnostics.Property_assignment_expected));
+                    continue;
                 }
-            }
-            function copySymbols(source, meaning) {
-                if (meaning) {
-                    for (var id in source) {
-                        var symbol = source[id];
-                        copySymbol(symbol, meaning);
+                if (element.questionToken) {
+                    errors.push(ts.createDiagnosticForNodeInSourceFile(sourceFile, element.questionToken, ts.Diagnostics._0_can_only_be_used_in_a_ts_file, "?"));
+                }
+                if (!isDoubleQuotedString(element.name)) {
+                    errors.push(ts.createDiagnosticForNodeInSourceFile(sourceFile, element.name, ts.Diagnostics.String_literal_with_double_quotes_expected));
+                }
+                var keyText = ts.getTextOfPropertyName(element.name);
+                var option = knownOptions ? knownOptions.get(keyText) : undefined;
+                if (extraKeyDiagnosticMessage && !option) {
+                    errors.push(ts.createDiagnosticForNodeInSourceFile(sourceFile, element.name, extraKeyDiagnosticMessage, keyText));
+                }
+                var value = convertPropertyValueToJson(element.initializer, option);
+                if (typeof keyText !== undefined && typeof value !== undefined) {
+                    result[keyText] = value;
+                    // Notify key value set, if user asked for it
+                    if (jsonConversionNotifier &&
+                        // Current callbacks are only on known parent option or if we are setting values in the root
+                        (parentOption || knownOptions === knownRootOptions)) {
+                        var isValidOptionValue = isCompilerOptionsValue(option, value);
+                        if (parentOption) {
+                            if (isValidOptionValue) {
+                                // Notify option set in the parent if its a valid option value
+                                jsonConversionNotifier.onSetValidOptionKeyValueInParent(parentOption, option, value);
+                            }
+                        }
+                        else if (knownOptions === knownRootOptions) {
+                            if (isValidOptionValue) {
+                                // Notify about the valid root key value being set
+                                jsonConversionNotifier.onSetValidOptionKeyValueInRoot(keyText, element.name, value, element.initializer);
+                            }
+                            else if (!option) {
+                                // Notify about the unknown root key value being set
+                                jsonConversionNotifier.onSetUnknownOptionKeyValueInRoot(keyText, element.name, value, element.initializer);
+                            }
+                        }
                     }
                 }
             }
-        }
-        function isTypeDeclarationName(name) {
-            return name.kind === 69 /* Identifier */ &&
-                isTypeDeclaration(name.parent) &&
-                name.parent.name === name;
-        }
-        function isTypeDeclaration(node) {
-            switch (node.kind) {
-                case 141 /* TypeParameter */:
-                case 221 /* ClassDeclaration */:
-                case 222 /* InterfaceDeclaration */:
-                case 223 /* TypeAliasDeclaration */:
-                case 224 /* EnumDeclaration */:
-                    return true;
-            }
-        }
-        // True if the given identifier is part of a type reference
-        function isTypeReferenceIdentifier(entityName) {
-            var node = entityName;
-            while (node.parent && node.parent.kind === 139 /* QualifiedName */) {
-                node = node.parent;
-            }
-            return node.parent && (node.parent.kind === 155 /* TypeReference */ || node.parent.kind === 267 /* JSDocTypeReference */);
-        }
-        function isHeritageClauseElementIdentifier(entityName) {
-            var node = entityName;
-            while (node.parent && node.parent.kind === 172 /* PropertyAccessExpression */) {
-                node = node.parent;
-            }
-            return node.parent && node.parent.kind === 194 /* ExpressionWithTypeArguments */;
-        }
-        function forEachEnclosingClass(node, callback) {
-            var result;
-            while (true) {
-                node = ts.getContainingClass(node);
-                if (!node)
-                    break;
-                if (result = callback(node))
-                    break;
-            }
             return result;
         }
-        function isNodeWithinClass(node, classDeclaration) {
-            return !!forEachEnclosingClass(node, function (n) { return n === classDeclaration; });
-        }
-        function getLeftSideOfImportEqualsOrExportAssignment(nodeOnRightSide) {
-            while (nodeOnRightSide.parent.kind === 139 /* QualifiedName */) {
-                nodeOnRightSide = nodeOnRightSide.parent;
-            }
-            if (nodeOnRightSide.parent.kind === 229 /* ImportEqualsDeclaration */) {
-                return nodeOnRightSide.parent.moduleReference === nodeOnRightSide && nodeOnRightSide.parent;
-            }
-            if (nodeOnRightSide.parent.kind === 235 /* ExportAssignment */) {
-                return nodeOnRightSide.parent.expression === nodeOnRightSide && nodeOnRightSide.parent;
+        function convertArrayLiteralExpressionToJson(elements, elementOption) {
+            var result = [];
+            for (var _i = 0, elements_4 = elements; _i < elements_4.length; _i++) {
+                var element = elements_4[_i];
+                result.push(convertPropertyValueToJson(element, elementOption));
             }
-            return undefined;
-        }
-        function isInRightSideOfImportOrExportAssignment(node) {
-            return getLeftSideOfImportEqualsOrExportAssignment(node) !== undefined;
+            return result;
         }
-        function getSymbolOfEntityNameOrPropertyAccessExpression(entityName) {
-            if (ts.isDeclarationName(entityName)) {
-                return getSymbolOfNode(entityName.parent);
-            }
-            if (ts.isInJavaScriptFile(entityName) && entityName.parent.kind === 172 /* PropertyAccessExpression */) {
-                var specialPropertyAssignmentKind = ts.getSpecialPropertyAssignmentKind(entityName.parent.parent);
-                switch (specialPropertyAssignmentKind) {
-                    case 1 /* ExportsProperty */:
-                    case 3 /* PrototypeProperty */:
-                        return getSymbolOfNode(entityName.parent);
-                    case 4 /* ThisProperty */:
-                    case 2 /* ModuleExports */:
-                        return getSymbolOfNode(entityName.parent.parent);
-                    default:
-                }
-            }
-            if (entityName.parent.kind === 235 /* ExportAssignment */ && ts.isEntityNameExpression(entityName)) {
-                return resolveEntityName(entityName, 
-                /*all meanings*/ 107455 /* Value */ | 793064 /* Type */ | 1920 /* Namespace */ | 8388608 /* Alias */);
-            }
-            if (entityName.kind !== 172 /* PropertyAccessExpression */ && isInRightSideOfImportOrExportAssignment(entityName)) {
-                // Since we already checked for ExportAssignment, this really could only be an Import
-                var importEqualsDeclaration = ts.getAncestor(entityName, 229 /* ImportEqualsDeclaration */);
-                ts.Debug.assert(importEqualsDeclaration !== undefined);
-                return getSymbolOfPartOfRightHandSideOfImportEquals(entityName, importEqualsDeclaration, /*dontResolveAlias*/ true);
-            }
-            if (ts.isRightSideOfQualifiedNameOrPropertyAccess(entityName)) {
-                entityName = entityName.parent;
-            }
-            if (isHeritageClauseElementIdentifier(entityName)) {
-                var meaning = 0 /* None */;
-                // In an interface or class, we're definitely interested in a type.
-                if (entityName.parent.kind === 194 /* ExpressionWithTypeArguments */) {
-                    meaning = 793064 /* Type */;
-                    // In a class 'extends' clause we are also looking for a value.
-                    if (ts.isExpressionWithTypeArgumentsInClassExtendsClause(entityName.parent)) {
-                        meaning |= 107455 /* Value */;
+        function convertPropertyValueToJson(valueExpression, option) {
+            switch (valueExpression.kind) {
+                case 101 /* TrueKeyword */:
+                    reportInvalidOptionValue(option && option.type !== "boolean");
+                    return true;
+                case 86 /* FalseKeyword */:
+                    reportInvalidOptionValue(option && option.type !== "boolean");
+                    return false;
+                case 95 /* NullKeyword */:
+                    reportInvalidOptionValue(!!option);
+                    return null; // tslint:disable-line:no-null-keyword
+                case 9 /* StringLiteral */:
+                    if (!isDoubleQuotedString(valueExpression)) {
+                        errors.push(ts.createDiagnosticForNodeInSourceFile(sourceFile, valueExpression, ts.Diagnostics.String_literal_with_double_quotes_expected));
                     }
-                }
-                else {
-                    meaning = 1920 /* Namespace */;
-                }
-                meaning |= 8388608 /* Alias */;
-                return resolveEntityName(entityName, meaning);
-            }
-            else if (ts.isPartOfExpression(entityName)) {
-                if (ts.nodeIsMissing(entityName)) {
-                    // Missing entity name.
-                    return undefined;
-                }
-                if (entityName.kind === 69 /* Identifier */) {
-                    if (ts.isJSXTagName(entityName) && isJsxIntrinsicIdentifier(entityName)) {
-                        return getIntrinsicTagSymbol(entityName.parent);
+                    reportInvalidOptionValue(option && (typeof option.type === "string" && option.type !== "string"));
+                    var text = valueExpression.text;
+                    if (option && typeof option.type !== "string") {
+                        var customOption = option;
+                        // Validate custom option type
+                        if (!customOption.type.has(text)) {
+                            errors.push(createDiagnosticForInvalidCustomType(customOption, function (message, arg0, arg1) { return ts.createDiagnosticForNodeInSourceFile(sourceFile, valueExpression, message, arg0, arg1); }));
+                        }
                     }
-                    return resolveEntityName(entityName, 107455 /* Value */, /*ignoreErrors*/ false, /*dontResolveAlias*/ true);
-                }
-                else if (entityName.kind === 172 /* PropertyAccessExpression */) {
-                    var symbol = getNodeLinks(entityName).resolvedSymbol;
-                    if (!symbol) {
-                        checkPropertyAccessExpression(entityName);
+                    return text;
+                case 8 /* NumericLiteral */:
+                    reportInvalidOptionValue(option && option.type !== "number");
+                    return Number(valueExpression.text);
+                case 178 /* ObjectLiteralExpression */:
+                    reportInvalidOptionValue(option && option.type !== "object");
+                    var objectLiteralExpression = valueExpression;
+                    // Currently having element option declaration in the tsconfig with type "object"
+                    // determines if it needs onSetValidOptionKeyValueInParent callback or not
+                    // At moment there are only "compilerOptions", "typeAcquisition" and "typingOptions"
+                    // that satifies it and need it to modify options set in them (for normalizing file paths)
+                    // vs what we set in the json
+                    // If need arises, we can modify this interface and callbacks as needed
+                    if (option) {
+                        var _a = option, elementOptions = _a.elementOptions, extraKeyDiagnosticMessage = _a.extraKeyDiagnosticMessage, optionName = _a.name;
+                        return convertObjectLiteralExpressionToJson(objectLiteralExpression, elementOptions, extraKeyDiagnosticMessage, optionName);
                     }
-                    return getNodeLinks(entityName).resolvedSymbol;
-                }
-                else if (entityName.kind === 139 /* QualifiedName */) {
-                    var symbol = getNodeLinks(entityName).resolvedSymbol;
-                    if (!symbol) {
-                        checkQualifiedName(entityName);
+                    else {
+                        return convertObjectLiteralExpressionToJson(objectLiteralExpression, /* knownOptions*/ undefined, 
+                        /*extraKeyDiagnosticMessage */ undefined, /*parentOption*/ undefined);
                     }
-                    return getNodeLinks(entityName).resolvedSymbol;
-                }
+                case 177 /* ArrayLiteralExpression */:
+                    reportInvalidOptionValue(option && option.type !== "list");
+                    return convertArrayLiteralExpressionToJson(valueExpression.elements, option && option.element);
             }
-            else if (isTypeReferenceIdentifier(entityName)) {
-                var meaning = (entityName.parent.kind === 155 /* TypeReference */ || entityName.parent.kind === 267 /* JSDocTypeReference */) ? 793064 /* Type */ : 1920 /* Namespace */;
-                return resolveEntityName(entityName, meaning, /*ignoreErrors*/ false, /*dontResolveAlias*/ true);
-            }
-            else if (entityName.parent.kind === 246 /* JsxAttribute */) {
-                return getJsxAttributePropertySymbol(entityName.parent);
+            // Not in expected format
+            if (option) {
+                reportInvalidOptionValue(/*isError*/ true);
             }
-            if (entityName.parent.kind === 154 /* TypePredicate */) {
-                return resolveEntityName(entityName, /*meaning*/ 1 /* FunctionScopedVariable */);
+            else {
+                errors.push(ts.createDiagnosticForNodeInSourceFile(sourceFile, valueExpression, ts.Diagnostics.Property_value_can_only_be_string_literal_numeric_literal_true_false_null_object_literal_or_array_literal));
             }
-            // Do we want to return undefined here?
             return undefined;
+            function reportInvalidOptionValue(isError) {
+                if (isError) {
+                    errors.push(ts.createDiagnosticForNodeInSourceFile(sourceFile, valueExpression, ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1, option.name, getCompilerOptionValueTypeString(option)));
+                }
+            }
         }
-        function getSymbolAtLocation(node) {
-            if (node.kind === 256 /* SourceFile */) {
-                return ts.isExternalModule(node) ? getMergedSymbol(node.symbol) : undefined;
+        function isDoubleQuotedString(node) {
+            return node.kind === 9 /* StringLiteral */ && ts.getSourceTextOfNodeFromSourceFile(sourceFile, node).charCodeAt(0) === 34 /* doubleQuote */;
+        }
+    }
+    function getCompilerOptionValueTypeString(option) {
+        return option.type === "list" ?
+            "Array" :
+            typeof option.type === "string" ? option.type : "string";
+    }
+    function isCompilerOptionsValue(option, value) {
+        if (option) {
+            if (option.type === "list") {
+                return ts.isArray(value);
             }
-            if (isInsideWithStatementBody(node)) {
-                // We cannot answer semantic questions within a with block, do not proceed any further
+            var expectedType = typeof option.type === "string" ? option.type : "string";
+            return typeof value === expectedType;
+        }
+    }
+    /**
+     * Generate tsconfig configuration when running command line "--init"
+     * @param options commandlineOptions to be generated into tsconfig.json
+     * @param fileNames array of filenames to be generated into tsconfig.json
+     */
+    /* @internal */
+    function generateTSConfig(options, fileNames, newLine) {
+        var compilerOptions = ts.extend(options, ts.defaultInitCompilerOptions);
+        var configurations = {
+            compilerOptions: serializeCompilerOptions(compilerOptions)
+        };
+        if (fileNames && fileNames.length) {
+            // only set the files property if we have at least one file
+            configurations.files = fileNames;
+        }
+        return writeConfigurations();
+        function getCustomTypeMapOfCommandLineOption(optionDefinition) {
+            if (optionDefinition.type === "string" || optionDefinition.type === "number" || optionDefinition.type === "boolean") {
+                // this is of a type CommandLineOptionOfPrimitiveType
                 return undefined;
             }
-            if (ts.isDeclarationName(node)) {
-                // This is a declaration, call getSymbolOfNode
-                return getSymbolOfNode(node.parent);
+            else if (optionDefinition.type === "list") {
+                return getCustomTypeMapOfCommandLineOption(optionDefinition.element);
             }
-            else if (ts.isLiteralComputedPropertyDeclarationName(node)) {
-                return getSymbolOfNode(node.parent.parent);
+            else {
+                return optionDefinition.type;
             }
-            if (node.kind === 69 /* Identifier */) {
-                if (isInRightSideOfImportOrExportAssignment(node)) {
-                    return getSymbolOfEntityNameOrPropertyAccessExpression(node);
+        }
+        function getNameOfCompilerOptionValue(value, customTypeMap) {
+            // There is a typeMap associated with this command-line option so use it to map value back to its name
+            return ts.forEachEntry(customTypeMap, function (mapValue, key) {
+                if (mapValue === value) {
+                    return key;
                 }
-                else if (node.parent.kind === 169 /* BindingElement */ &&
-                    node.parent.parent.kind === 167 /* ObjectBindingPattern */ &&
-                    node === node.parent.propertyName) {
-                    var typeOfPattern = getTypeOfNode(node.parent.parent);
-                    var propertyDeclaration = typeOfPattern && getPropertyOfType(typeOfPattern, node.text);
-                    if (propertyDeclaration) {
-                        return propertyDeclaration;
+            });
+        }
+        function serializeCompilerOptions(options) {
+            var result = {};
+            var optionsNameMap = getOptionNameMap().optionNameMap;
+            for (var name_37 in options) {
+                if (ts.hasProperty(options, name_37)) {
+                    // tsconfig only options cannot be specified via command line,
+                    // so we can assume that only types that can appear here string | number | boolean
+                    if (optionsNameMap.has(name_37) && optionsNameMap.get(name_37).category === ts.Diagnostics.Command_line_Options) {
+                        continue;
                     }
-                }
-            }
-            switch (node.kind) {
-                case 69 /* Identifier */:
-                case 172 /* PropertyAccessExpression */:
-                case 139 /* QualifiedName */:
-                    return getSymbolOfEntityNameOrPropertyAccessExpression(node);
-                case 97 /* ThisKeyword */:
-                    var container = ts.getThisContainer(node, /*includeArrowFunctions*/ false);
-                    if (ts.isFunctionLike(container)) {
-                        var sig = getSignatureFromDeclaration(container);
-                        if (sig.thisParameter) {
-                            return sig.thisParameter;
+                    var value = options[name_37];
+                    var optionDefinition = optionsNameMap.get(name_37.toLowerCase());
+                    if (optionDefinition) {
+                        var customTypeMap = getCustomTypeMapOfCommandLineOption(optionDefinition);
+                        if (!customTypeMap) {
+                            // There is no map associated with this compiler option then use the value as-is
+                            // This is the case if the value is expect to be string, number, boolean or list of string
+                            result[name_37] = value;
+                        }
+                        else {
+                            if (optionDefinition.type === "list") {
+                                var convertedValue = [];
+                                for (var _i = 0, _a = value; _i < _a.length; _i++) {
+                                    var element = _a[_i];
+                                    convertedValue.push(getNameOfCompilerOptionValue(element, customTypeMap));
+                                }
+                                result[name_37] = convertedValue;
+                            }
+                            else {
+                                // There is a typeMap associated with this command-line option so use it to map value back to its name
+                                result[name_37] = getNameOfCompilerOptionValue(value, customTypeMap);
+                            }
                         }
                     }
-                // fallthrough
-                case 95 /* SuperKeyword */:
-                    var type = ts.isPartOfExpression(node) ? checkExpression(node) : getTypeFromTypeNode(node);
-                    return type.symbol;
-                case 165 /* ThisType */:
-                    return getTypeFromTypeNode(node).symbol;
-                case 121 /* ConstructorKeyword */:
-                    // constructor keyword for an overload, should take us to the definition if it exist
-                    var constructorDeclaration = node.parent;
-                    if (constructorDeclaration && constructorDeclaration.kind === 148 /* Constructor */) {
-                        return constructorDeclaration.parent.symbol;
-                    }
-                    return undefined;
-                case 9 /* StringLiteral */:
-                    // External module name in an import declaration
-                    if ((ts.isExternalModuleImportEqualsDeclaration(node.parent.parent) &&
-                        ts.getExternalModuleImportEqualsDeclarationExpression(node.parent.parent) === node) ||
-                        ((node.parent.kind === 230 /* ImportDeclaration */ || node.parent.kind === 236 /* ExportDeclaration */) &&
-                            node.parent.moduleSpecifier === node)) {
-                        return resolveExternalModuleName(node, node);
-                    }
-                // Fall through
-                case 8 /* NumericLiteral */:
-                    // index access
-                    if (node.parent.kind === 173 /* ElementAccessExpression */ && node.parent.argumentExpression === node) {
-                        var objectType = checkExpression(node.parent.expression);
-                        if (objectType === unknownType)
-                            return undefined;
-                        var apparentType = getApparentType(objectType);
-                        if (apparentType === unknownType)
-                            return undefined;
-                        return getPropertyOfType(apparentType, node.text);
-                    }
-                    break;
+                }
             }
-            return undefined;
+            return result;
         }
-        function getShorthandAssignmentValueSymbol(location) {
-            // The function returns a value symbol of an identifier in the short-hand property assignment.
-            // This is necessary as an identifier in short-hand property assignment can contains two meaning:
-            // property name and property value.
-            if (location && location.kind === 254 /* ShorthandPropertyAssignment */) {
-                return resolveEntityName(location.name, 107455 /* Value */ | 8388608 /* Alias */);
+        function getDefaultValueForOption(option) {
+            switch (option.type) {
+                case "number":
+                    return 1;
+                case "boolean":
+                    return true;
+                case "string":
+                    return option.isFilePath ? "./" : "";
+                case "list":
+                    return [];
+                case "object":
+                    return {};
+                default:
+                    return ts.arrayFrom(option.type.keys())[0];
             }
-            return undefined;
         }
-        /** Returns the target of an export specifier without following aliases */
-        function getExportSpecifierLocalTargetSymbol(node) {
-            return node.parent.parent.moduleSpecifier ?
-                getExternalModuleMember(node.parent.parent, node) :
-                resolveEntityName(node.propertyName || node.name, 107455 /* Value */ | 793064 /* Type */ | 1920 /* Namespace */ | 8388608 /* Alias */);
-        }
-        function getTypeOfNode(node) {
-            if (isInsideWithStatementBody(node)) {
-                // We cannot answer semantic questions within a with block, do not proceed any further
-                return unknownType;
-            }
-            if (ts.isPartOfTypeNode(node)) {
-                return getTypeFromTypeNode(node);
-            }
-            if (ts.isPartOfExpression(node)) {
-                return getTypeOfExpression(node);
-            }
-            if (ts.isExpressionWithTypeArgumentsInClassExtendsClause(node)) {
-                // A SyntaxKind.ExpressionWithTypeArguments is considered a type node, except when it occurs in the
-                // extends clause of a class. We handle that case here.
-                return getBaseTypes(getDeclaredTypeOfSymbol(getSymbolOfNode(node.parent.parent)))[0];
-            }
-            if (isTypeDeclaration(node)) {
-                // In this case, we call getSymbolOfNode instead of getSymbolAtLocation because it is a declaration
-                var symbol = getSymbolOfNode(node);
-                return getDeclaredTypeOfSymbol(symbol);
-            }
-            if (isTypeDeclarationName(node)) {
-                var symbol = getSymbolAtLocation(node);
-                return symbol && getDeclaredTypeOfSymbol(symbol);
-            }
-            if (ts.isDeclaration(node)) {
-                // In this case, we call getSymbolOfNode instead of getSymbolAtLocation because it is a declaration
-                var symbol = getSymbolOfNode(node);
-                return getTypeOfSymbol(symbol);
-            }
-            if (ts.isDeclarationName(node)) {
-                var symbol = getSymbolAtLocation(node);
-                return symbol && getTypeOfSymbol(symbol);
-            }
-            if (ts.isBindingPattern(node)) {
-                return getTypeForVariableLikeDeclaration(node.parent, /*includeOptionality*/ true);
-            }
-            if (isInRightSideOfImportOrExportAssignment(node)) {
-                var symbol = getSymbolAtLocation(node);
-                var declaredType = symbol && getDeclaredTypeOfSymbol(symbol);
-                return declaredType !== unknownType ? declaredType : getTypeOfSymbol(symbol);
-            }
-            return unknownType;
+        function makePadding(paddingLength) {
+            return Array(paddingLength + 1).join(" ");
         }
-        // Gets the type of object literal or array literal of destructuring assignment.
-        // { a } from
-        //     for ( { a } of elems) {
-        //     }
-        // [ a ] from
-        //     [a] = [ some array ...]
-        function getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(expr) {
-            ts.Debug.assert(expr.kind === 171 /* ObjectLiteralExpression */ || expr.kind === 170 /* ArrayLiteralExpression */);
-            // If this is from "for of"
-            //     for ( { a } of elems) {
-            //     }
-            if (expr.parent.kind === 208 /* ForOfStatement */) {
-                var iteratedType = checkRightHandSideOfForOf(expr.parent.expression);
-                return checkDestructuringAssignment(expr, iteratedType || unknownType);
-            }
-            // If this is from "for" initializer
-            //     for ({a } = elems[0];.....) { }
-            if (expr.parent.kind === 187 /* BinaryExpression */) {
-                var iteratedType = checkExpression(expr.parent.right);
-                return checkDestructuringAssignment(expr, iteratedType || unknownType);
+        function writeConfigurations() {
+            // Filter applicable options to place in the file
+            var categorizedOptions = ts.reduceLeft(ts.filter(ts.optionDeclarations, function (o) { return o.category !== ts.Diagnostics.Command_line_Options && o.category !== ts.Diagnostics.Advanced_Options; }), function (memo, value) {
+                if (value.category) {
+                    var name_38 = ts.getLocaleSpecificMessage(value.category);
+                    (memo[name_38] || (memo[name_38] = [])).push(value);
+                }
+                return memo;
+            }, {});
+            // Serialize all options and thier descriptions
+            var marginLength = 0;
+            var seenKnownKeys = 0;
+            var nameColumn = [];
+            var descriptionColumn = [];
+            var knownKeysCount = ts.getOwnKeys(configurations.compilerOptions).length;
+            for (var category in categorizedOptions) {
+                if (nameColumn.length !== 0) {
+                    nameColumn.push("");
+                    descriptionColumn.push("");
+                }
+                nameColumn.push("/* " + category + " */");
+                descriptionColumn.push("");
+                for (var _i = 0, _a = categorizedOptions[category]; _i < _a.length; _i++) {
+                    var option = _a[_i];
+                    var optionName = void 0;
+                    if (ts.hasProperty(configurations.compilerOptions, option.name)) {
+                        optionName = "\"" + option.name + "\": " + JSON.stringify(configurations.compilerOptions[option.name]) + ((seenKnownKeys += 1) === knownKeysCount ? "" : ",");
+                    }
+                    else {
+                        optionName = "// \"" + option.name + "\": " + JSON.stringify(getDefaultValueForOption(option)) + ",";
+                    }
+                    nameColumn.push(optionName);
+                    descriptionColumn.push("/* " + (option.description && ts.getLocaleSpecificMessage(option.description) || option.name) + " */");
+                    marginLength = Math.max(optionName.length, marginLength);
+                }
             }
-            // If this is from nested object binding pattern
-            //     for ({ skills: { primary, secondary } } = multiRobot, i = 0; i < 1; i++) {
-            if (expr.parent.kind === 253 /* PropertyAssignment */) {
-                var typeOfParentObjectLiteral = getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(expr.parent.parent);
-                return checkObjectLiteralDestructuringPropertyAssignment(typeOfParentObjectLiteral || unknownType, expr.parent);
+            // Write the output
+            var tab = makePadding(2);
+            var result = [];
+            result.push("{");
+            result.push(tab + "\"compilerOptions\": {");
+            // Print out each row, aligning all the descriptions on the same column.
+            for (var i = 0; i < nameColumn.length; i++) {
+                var optionName = nameColumn[i];
+                var description = descriptionColumn[i];
+                result.push(optionName && "" + tab + tab + optionName + (description && (makePadding(marginLength - optionName.length + 2) + description)));
+            }
+            if (configurations.files && configurations.files.length) {
+                result.push(tab + "},");
+                result.push(tab + "\"files\": [");
+                for (var i = 0; i < configurations.files.length; i++) {
+                    result.push("" + tab + tab + JSON.stringify(configurations.files[i]) + (i === configurations.files.length - 1 ? "" : ","));
+                }
+                result.push(tab + "]");
             }
-            // Array literal assignment - array destructuring pattern
-            ts.Debug.assert(expr.parent.kind === 170 /* ArrayLiteralExpression */);
-            //    [{ property1: p1, property2 }] = elems;
-            var typeOfArrayLiteral = getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(expr.parent);
-            var elementType = checkIteratedTypeOrElementType(typeOfArrayLiteral || unknownType, expr.parent, /*allowStringInput*/ false) || unknownType;
-            return checkArrayLiteralDestructuringElementAssignment(expr.parent, typeOfArrayLiteral, ts.indexOf(expr.parent.elements, expr), elementType || unknownType);
-        }
-        // Gets the property symbol corresponding to the property in destructuring assignment
-        // 'property1' from
-        //     for ( { property1: a } of elems) {
-        //     }
-        // 'property1' at location 'a' from:
-        //     [a] = [ property1, property2 ]
-        function getPropertySymbolOfDestructuringAssignment(location) {
-            // Get the type of the object or array literal and then look for property of given name in the type
-            var typeOfObjectLiteral = getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(location.parent.parent);
-            return typeOfObjectLiteral && getPropertyOfType(typeOfObjectLiteral, location.text);
-        }
-        function getTypeOfExpression(expr) {
-            if (ts.isRightSideOfQualifiedNameOrPropertyAccess(expr)) {
-                expr = expr.parent;
+            else {
+                result.push(tab + "}");
             }
-            return getRegularTypeOfLiteralType(checkExpression(expr));
-        }
-        /**
-          * Gets either the static or instance type of a class element, based on
-          * whether the element is declared as "static".
-          */
-        function getParentTypeOfClassElement(node) {
-            var classSymbol = getSymbolOfNode(node.parent);
-            return ts.getModifierFlags(node) & 32 /* Static */
-                ? getTypeOfSymbol(classSymbol)
-                : getDeclaredTypeOfSymbol(classSymbol);
+            result.push("}");
+            return result.join(newLine);
         }
-        // Return the list of properties of the given type, augmented with properties from Function
-        // if the type has call or construct signatures
-        function getAugmentedPropertiesOfType(type) {
-            type = getApparentType(type);
-            var propsByName = createSymbolTable(getPropertiesOfType(type));
-            if (getSignaturesOfType(type, 0 /* Call */).length || getSignaturesOfType(type, 1 /* Construct */).length) {
-                ts.forEach(getPropertiesOfType(globalFunctionType), function (p) {
-                    if (!propsByName[p.name]) {
-                        propsByName[p.name] = p;
-                    }
-                });
-            }
-            return getNamedMembers(propsByName);
+    }
+    ts.generateTSConfig = generateTSConfig;
+    /**
+     * Parse the contents of a config file (tsconfig.json).
+     * @param json The contents of the config file to parse
+     * @param host Instance of ParseConfigHost used to enumerate files in folder.
+     * @param basePath A root directory to resolve relative path entries in the config
+     *    file to. e.g. outDir
+     */
+    function parseJsonConfigFileContent(json, host, basePath, existingOptions, configFileName, resolutionStack, extraFileExtensions) {
+        return parseJsonConfigFileContentWorker(json, /*sourceFile*/ undefined, host, basePath, existingOptions, configFileName, resolutionStack, extraFileExtensions);
+    }
+    ts.parseJsonConfigFileContent = parseJsonConfigFileContent;
+    /**
+     * Parse the contents of a config file (tsconfig.json).
+     * @param jsonNode The contents of the config file to parse
+     * @param host Instance of ParseConfigHost used to enumerate files in folder.
+     * @param basePath A root directory to resolve relative path entries in the config
+     *    file to. e.g. outDir
+     */
+    function parseJsonSourceFileConfigFileContent(sourceFile, host, basePath, existingOptions, configFileName, resolutionStack, extraFileExtensions) {
+        return parseJsonConfigFileContentWorker(/*json*/ undefined, sourceFile, host, basePath, existingOptions, configFileName, resolutionStack, extraFileExtensions);
+    }
+    ts.parseJsonSourceFileConfigFileContent = parseJsonSourceFileConfigFileContent;
+    /*@internal*/
+    function setConfigFileInOptions(options, configFile) {
+        if (configFile) {
+            Object.defineProperty(options, "configFile", { enumerable: false, writable: false, value: configFile });
         }
-        function getRootSymbols(symbol) {
-            if (symbol.flags & 268435456 /* SyntheticProperty */) {
-                var symbols_3 = [];
-                var name_23 = symbol.name;
-                ts.forEach(getSymbolLinks(symbol).containingType.types, function (t) {
-                    var symbol = getPropertyOfType(t, name_23);
-                    if (symbol) {
-                        symbols_3.push(symbol);
+    }
+    ts.setConfigFileInOptions = setConfigFileInOptions;
+    /**
+     * Parse the contents of a config file from json or json source file (tsconfig.json).
+     * @param json The contents of the config file to parse
+     * @param sourceFile sourceFile corresponding to the Json
+     * @param host Instance of ParseConfigHost used to enumerate files in folder.
+     * @param basePath A root directory to resolve relative path entries in the config
+     *    file to. e.g. outDir
+     * @param resolutionStack Only present for backwards-compatibility. Should be empty.
+     */
+    function parseJsonConfigFileContentWorker(json, sourceFile, host, basePath, existingOptions, configFileName, resolutionStack, extraFileExtensions) {
+        if (existingOptions === void 0) { existingOptions = {}; }
+        if (resolutionStack === void 0) { resolutionStack = []; }
+        if (extraFileExtensions === void 0) { extraFileExtensions = []; }
+        ts.Debug.assert((json === undefined && sourceFile !== undefined) || (json !== undefined && sourceFile === undefined));
+        var errors = [];
+        var parsedConfig = parseConfig(json, sourceFile, host, basePath, configFileName, resolutionStack, errors);
+        var raw = parsedConfig.raw;
+        var options = ts.extend(existingOptions, parsedConfig.options || {});
+        options.configFilePath = configFileName;
+        setConfigFileInOptions(options, sourceFile);
+        var _a = getFileNames(), fileNames = _a.fileNames, wildcardDirectories = _a.wildcardDirectories;
+        return {
+            options: options,
+            fileNames: fileNames,
+            typeAcquisition: parsedConfig.typeAcquisition || getDefaultTypeAcquisition(),
+            raw: raw,
+            errors: errors,
+            wildcardDirectories: wildcardDirectories,
+            compileOnSave: !!raw.compileOnSave
+        };
+        function getFileNames() {
+            var fileNames;
+            if (ts.hasProperty(raw, "files")) {
+                if (ts.isArray(raw["files"])) {
+                    fileNames = raw["files"];
+                    if (fileNames.length === 0) {
+                        createCompilerDiagnosticOnlyIfJson(ts.Diagnostics.The_files_list_in_config_file_0_is_empty, configFileName || "tsconfig.json");
                     }
-                });
-                return symbols_3;
+                }
+                else {
+                    createCompilerDiagnosticOnlyIfJson(ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1, "files", "Array");
+                }
             }
-            else if (symbol.flags & 67108864 /* Transient */) {
-                var target = void 0;
-                var next = symbol;
-                while (next = getSymbolLinks(next).target) {
-                    target = next;
+            var includeSpecs;
+            if (ts.hasProperty(raw, "include")) {
+                if (ts.isArray(raw["include"])) {
+                    includeSpecs = raw["include"];
                 }
-                if (target) {
-                    return [target];
+                else {
+                    createCompilerDiagnosticOnlyIfJson(ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1, "include", "Array");
                 }
             }
-            return [symbol];
-        }
-        // Emitter support
-        function isArgumentsLocalBinding(node) {
-            if (!ts.isGeneratedIdentifier(node)) {
-                node = ts.getParseTreeNode(node, ts.isIdentifier);
-                if (node) {
-                    return getReferencedValueSymbol(node) === argumentsSymbol;
+            var excludeSpecs;
+            if (ts.hasProperty(raw, "exclude")) {
+                if (ts.isArray(raw["exclude"])) {
+                    excludeSpecs = raw["exclude"];
+                }
+                else {
+                    createCompilerDiagnosticOnlyIfJson(ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1, "exclude", "Array");
                 }
             }
-            return false;
-        }
-        function moduleExportsSomeValue(moduleReferenceExpression) {
-            var moduleSymbol = resolveExternalModuleName(moduleReferenceExpression.parent, moduleReferenceExpression);
-            if (!moduleSymbol || ts.isShorthandAmbientModuleSymbol(moduleSymbol)) {
-                // If the module is not found or is shorthand, assume that it may export a value.
-                return true;
+            else {
+                // If no includes were specified, exclude common package folders and the outDir
+                excludeSpecs = includeSpecs ? [] : ["node_modules", "bower_components", "jspm_packages"];
+                var outDir = raw["compilerOptions"] && raw["compilerOptions"]["outDir"];
+                if (outDir) {
+                    excludeSpecs.push(outDir);
+                }
             }
-            var hasExportAssignment = hasExportAssignmentSymbol(moduleSymbol);
-            // if module has export assignment then 'resolveExternalModuleSymbol' will return resolved symbol for export assignment
-            // otherwise it will return moduleSymbol itself
-            moduleSymbol = resolveExternalModuleSymbol(moduleSymbol);
-            var symbolLinks = getSymbolLinks(moduleSymbol);
-            if (symbolLinks.exportsSomeValue === undefined) {
-                // for export assignments - check if resolved symbol for RHS is itself a value
-                // otherwise - check if at least one export is value
-                symbolLinks.exportsSomeValue = hasExportAssignment
-                    ? !!(moduleSymbol.flags & 107455 /* Value */)
-                    : ts.forEachProperty(getExportsOfModule(moduleSymbol), isValue);
+            if (fileNames === undefined && includeSpecs === undefined) {
+                includeSpecs = ["**/*"];
             }
-            return symbolLinks.exportsSomeValue;
-            function isValue(s) {
-                s = resolveSymbol(s);
-                return s && !!(s.flags & 107455 /* Value */);
+            var result = matchFileNames(fileNames, includeSpecs, excludeSpecs, basePath, options, host, errors, extraFileExtensions, sourceFile);
+            if (result.fileNames.length === 0 && !ts.hasProperty(raw, "files") && resolutionStack.length === 0) {
+                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.No_inputs_were_found_in_config_file_0_Specified_include_paths_were_1_and_exclude_paths_were_2, configFileName || "tsconfig.json", JSON.stringify(includeSpecs || []), JSON.stringify(excludeSpecs || [])));
             }
+            return result;
         }
-        function isNameOfModuleOrEnumDeclaration(node) {
-            var parent = node.parent;
-            return ts.isModuleOrEnumDeclaration(parent) && node === parent.name;
+        function createCompilerDiagnosticOnlyIfJson(message, arg0, arg1) {
+            if (!sourceFile) {
+                errors.push(ts.createCompilerDiagnostic(message, arg0, arg1));
+            }
         }
-        // When resolved as an expression identifier, if the given node references an exported entity, return the declaration
-        // node of the exported entity's container. Otherwise, return undefined.
-        function getReferencedExportContainer(node, prefixLocals) {
-            node = ts.getParseTreeNode(node, ts.isIdentifier);
-            if (node) {
-                // When resolving the export container for the name of a module or enum
-                // declaration, we need to start resolution at the declaration's container.
-                // Otherwise, we could incorrectly resolve the export container as the
-                // declaration if it contains an exported member with the same name.
-                var symbol = getReferencedValueSymbol(node, /*startInDeclarationContainer*/ isNameOfModuleOrEnumDeclaration(node));
-                if (symbol) {
-                    if (symbol.flags & 1048576 /* ExportValue */) {
-                        // If we reference an exported entity within the same module declaration, then whether
-                        // we prefix depends on the kind of entity. SymbolFlags.ExportHasLocal encompasses all the
-                        // kinds that we do NOT prefix.
-                        var exportSymbol = getMergedSymbol(symbol.exportSymbol);
-                        if (!prefixLocals && exportSymbol.flags & 944 /* ExportHasLocal */) {
-                            return undefined;
-                        }
-                        symbol = exportSymbol;
+    }
+    function isSuccessfulParsedTsconfig(value) {
+        return !!value.options;
+    }
+    /**
+     * This *just* extracts options/include/exclude/files out of a config file.
+     * It does *not* resolve the included files.
+     */
+    function parseConfig(json, sourceFile, host, basePath, configFileName, resolutionStack, errors) {
+        basePath = ts.normalizeSlashes(basePath);
+        var getCanonicalFileName = ts.createGetCanonicalFileName(host.useCaseSensitiveFileNames);
+        var resolvedPath = ts.toPath(configFileName || "", basePath, getCanonicalFileName);
+        if (resolutionStack.indexOf(resolvedPath) >= 0) {
+            errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Circularity_detected_while_resolving_configuration_Colon_0, resolutionStack.concat([resolvedPath]).join(" -> ")));
+            return { raw: json || convertToObject(sourceFile, errors) };
+        }
+        var ownConfig = json ?
+            parseOwnConfigOfJson(json, host, basePath, getCanonicalFileName, configFileName, errors) :
+            parseOwnConfigOfJsonSourceFile(sourceFile, host, basePath, getCanonicalFileName, configFileName, errors);
+        if (ownConfig.extendedConfigPath) {
+            // copy the resolution stack so it is never reused between branches in potential diamond-problem scenarios.
+            resolutionStack = resolutionStack.concat([resolvedPath]);
+            var extendedConfig = getExtendedConfig(sourceFile, ownConfig.extendedConfigPath, host, basePath, getCanonicalFileName, resolutionStack, errors);
+            if (extendedConfig && isSuccessfulParsedTsconfig(extendedConfig)) {
+                var baseRaw_1 = extendedConfig.raw;
+                var raw_1 = ownConfig.raw;
+                var setPropertyInRawIfNotUndefined = function (propertyName) {
+                    var value = raw_1[propertyName] || baseRaw_1[propertyName];
+                    if (value) {
+                        raw_1[propertyName] = value;
                     }
-                    var parentSymbol = getParentOfSymbol(symbol);
-                    if (parentSymbol) {
-                        if (parentSymbol.flags & 512 /* ValueModule */ && parentSymbol.valueDeclaration.kind === 256 /* SourceFile */) {
-                            var symbolFile = parentSymbol.valueDeclaration;
-                            var referenceFile = ts.getSourceFileOfNode(node);
-                            // If `node` accesses an export and that export isn't in the same file, then symbol is a namespace export, so return undefined.
-                            var symbolIsUmdExport = symbolFile !== referenceFile;
-                            return symbolIsUmdExport ? undefined : symbolFile;
-                        }
-                        for (var n = node.parent; n; n = n.parent) {
-                            if (ts.isModuleOrEnumDeclaration(n) && getSymbolOfNode(n) === parentSymbol) {
-                                return n;
-                            }
+                };
+                setPropertyInRawIfNotUndefined("include");
+                setPropertyInRawIfNotUndefined("exclude");
+                setPropertyInRawIfNotUndefined("files");
+                if (raw_1.compileOnSave === undefined) {
+                    raw_1.compileOnSave = baseRaw_1.compileOnSave;
+                }
+                ownConfig.options = ts.assign({}, extendedConfig.options, ownConfig.options);
+                // TODO extend type typeAcquisition
+            }
+        }
+        return ownConfig;
+    }
+    function parseOwnConfigOfJson(json, host, basePath, getCanonicalFileName, configFileName, errors) {
+        if (ts.hasProperty(json, "excludes")) {
+            errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unknown_option_excludes_Did_you_mean_exclude));
+        }
+        var options = convertCompilerOptionsFromJsonWorker(json.compilerOptions, basePath, errors, configFileName);
+        // typingOptions has been deprecated and is only supported for backward compatibility purposes.
+        // It should be removed in future releases - use typeAcquisition instead.
+        var typeAcquisition = convertTypeAcquisitionFromJsonWorker(json["typeAcquisition"] || json["typingOptions"], basePath, errors, configFileName);
+        json.compileOnSave = convertCompileOnSaveOptionFromJson(json, basePath, errors);
+        var extendedConfigPath;
+        if (json.extends) {
+            if (typeof json.extends !== "string") {
+                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1, "extends", "string"));
+            }
+            else {
+                extendedConfigPath = getExtendsConfigPath(json.extends, host, basePath, getCanonicalFileName, errors, ts.createCompilerDiagnostic);
+            }
+        }
+        return { raw: json, options: options, typeAcquisition: typeAcquisition, extendedConfigPath: extendedConfigPath };
+    }
+    function parseOwnConfigOfJsonSourceFile(sourceFile, host, basePath, getCanonicalFileName, configFileName, errors) {
+        var options = getDefaultCompilerOptions(configFileName);
+        var typeAcquisition, typingOptionstypeAcquisition;
+        var extendedConfigPath;
+        var optionsIterator = {
+            onSetValidOptionKeyValueInParent: function (parentOption, option, value) {
+                ts.Debug.assert(parentOption === "compilerOptions" || parentOption === "typeAcquisition" || parentOption === "typingOptions");
+                var currentOption = parentOption === "compilerOptions" ?
+                    options :
+                    parentOption === "typeAcquisition" ?
+                        (typeAcquisition || (typeAcquisition = getDefaultTypeAcquisition(configFileName))) :
+                        (typingOptionstypeAcquisition || (typingOptionstypeAcquisition = getDefaultTypeAcquisition(configFileName)));
+                currentOption[option.name] = normalizeOptionValue(option, basePath, value);
+            },
+            onSetValidOptionKeyValueInRoot: function (key, _keyNode, value, valueNode) {
+                switch (key) {
+                    case "extends":
+                        extendedConfigPath = getExtendsConfigPath(value, host, basePath, getCanonicalFileName, errors, function (message, arg0) {
+                            return ts.createDiagnosticForNodeInSourceFile(sourceFile, valueNode, message, arg0);
+                        });
+                        return;
+                    case "files":
+                        if (value.length === 0) {
+                            errors.push(ts.createDiagnosticForNodeInSourceFile(sourceFile, valueNode, ts.Diagnostics.The_files_list_in_config_file_0_is_empty, configFileName || "tsconfig.json"));
                         }
-                    }
+                        return;
                 }
-            }
-        }
-        // When resolved as an expression identifier, if the given node references an import, return the declaration of
-        // that import. Otherwise, return undefined.
-        function getReferencedImportDeclaration(node) {
-            node = ts.getParseTreeNode(node, ts.isIdentifier);
-            if (node) {
-                var symbol = getReferencedValueSymbol(node);
-                if (symbol && symbol.flags & 8388608 /* Alias */) {
-                    return getDeclarationOfAliasSymbol(symbol);
+            },
+            onSetUnknownOptionKeyValueInRoot: function (key, keyNode, _value, _valueNode) {
+                if (key === "excludes") {
+                    errors.push(ts.createDiagnosticForNodeInSourceFile(sourceFile, keyNode, ts.Diagnostics.Unknown_option_excludes_Did_you_mean_exclude));
                 }
             }
+        };
+        var json = convertToObjectWorker(sourceFile, errors, getTsconfigRootOptionsMap(), optionsIterator);
+        if (!typeAcquisition) {
+            if (typingOptionstypeAcquisition) {
+                typeAcquisition = (typingOptionstypeAcquisition.enableAutoDiscovery !== undefined) ?
+                    {
+                        enable: typingOptionstypeAcquisition.enableAutoDiscovery,
+                        include: typingOptionstypeAcquisition.include,
+                        exclude: typingOptionstypeAcquisition.exclude
+                    } :
+                    typingOptionstypeAcquisition;
+            }
+            else {
+                typeAcquisition = getDefaultTypeAcquisition(configFileName);
+            }
+        }
+        return { raw: json, options: options, typeAcquisition: typeAcquisition, extendedConfigPath: extendedConfigPath };
+    }
+    function getExtendsConfigPath(extendedConfig, host, basePath, getCanonicalFileName, errors, createDiagnostic) {
+        extendedConfig = ts.normalizeSlashes(extendedConfig);
+        // If the path isn't a rooted or relative path, don't try to resolve it (we reserve the right to special case module-id like paths in the future)
+        if (!(ts.isRootedDiskPath(extendedConfig) || ts.startsWith(extendedConfig, "./") || ts.startsWith(extendedConfig, "../"))) {
+            errors.push(createDiagnostic(ts.Diagnostics.A_path_in_an_extends_option_must_be_relative_or_rooted_but_0_is_not, extendedConfig));
             return undefined;
         }
-        function isSymbolOfDeclarationWithCollidingName(symbol) {
-            if (symbol.flags & 418 /* BlockScoped */) {
-                var links = getSymbolLinks(symbol);
-                if (links.isDeclarationWithCollidingName === undefined) {
-                    var container = ts.getEnclosingBlockScopeContainer(symbol.valueDeclaration);
-                    if (ts.isStatementWithLocals(container)) {
-                        var nodeLinks_1 = getNodeLinks(symbol.valueDeclaration);
-                        if (!!resolveName(container.parent, symbol.name, 107455 /* Value */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined)) {
-                            // redeclaration - always should be renamed
-                            links.isDeclarationWithCollidingName = true;
-                        }
-                        else if (nodeLinks_1.flags & 131072 /* CapturedBlockScopedBinding */) {
-                            // binding is captured in the function
-                            // should be renamed if:
-                            // - binding is not top level - top level bindings never collide with anything
-                            // AND
-                            //   - binding is not declared in loop, should be renamed to avoid name reuse across siblings
-                            //     let a, b
-                            //     { let x = 1; a = () => x;  }
-                            //     { let x = 100; b = () => x; }
-                            //     console.log(a()); // should print '1'
-                            //     console.log(b()); // should print '100'
-                            //     OR
-                            //   - binding is declared inside loop but not in inside initializer of iteration statement or directly inside loop body
-                            //     * variables from initializer are passed to rewritten loop body as parameters so they are not captured directly
-                            //     * variables that are declared immediately in loop body will become top level variable after loop is rewritten and thus
-                            //       they will not collide with anything
-                            var isDeclaredInLoop = nodeLinks_1.flags & 262144 /* BlockScopedBindingInLoop */;
-                            var inLoopInitializer = ts.isIterationStatement(container, /*lookInLabeledStatements*/ false);
-                            var inLoopBodyBlock = container.kind === 199 /* Block */ && ts.isIterationStatement(container.parent, /*lookInLabeledStatements*/ false);
-                            links.isDeclarationWithCollidingName = !ts.isBlockScopedContainerTopLevel(container) && (!isDeclaredInLoop || (!inLoopInitializer && !inLoopBodyBlock));
-                        }
-                        else {
-                            links.isDeclarationWithCollidingName = false;
-                        }
-                    }
-                }
-                return links.isDeclarationWithCollidingName;
+        var extendedConfigPath = ts.toPath(extendedConfig, basePath, getCanonicalFileName);
+        if (!host.fileExists(extendedConfigPath) && !ts.endsWith(extendedConfigPath, ".json")) {
+            extendedConfigPath = extendedConfigPath + ".json";
+            if (!host.fileExists(extendedConfigPath)) {
+                errors.push(createDiagnostic(ts.Diagnostics.File_0_does_not_exist, extendedConfig));
+                return undefined;
             }
-            return false;
         }
-        // When resolved as an expression identifier, if the given node references a nested block scoped entity with
-        // a name that either hides an existing name or might hide it when compiled downlevel,
-        // return the declaration of that entity. Otherwise, return undefined.
-        function getReferencedDeclarationWithCollidingName(node) {
-            if (!ts.isGeneratedIdentifier(node)) {
-                node = ts.getParseTreeNode(node, ts.isIdentifier);
-                if (node) {
-                    var symbol = getReferencedValueSymbol(node);
-                    if (symbol && isSymbolOfDeclarationWithCollidingName(symbol)) {
-                        return symbol.valueDeclaration;
-                    }
-                }
-            }
+        return extendedConfigPath;
+    }
+    function getExtendedConfig(sourceFile, extendedConfigPath, host, basePath, getCanonicalFileName, resolutionStack, errors) {
+        var extendedResult = readJsonConfigFile(extendedConfigPath, function (path) { return host.readFile(path); });
+        if (sourceFile) {
+            (sourceFile.extendedSourceFiles || (sourceFile.extendedSourceFiles = [])).push(extendedResult.fileName);
+        }
+        if (extendedResult.parseDiagnostics.length) {
+            errors.push.apply(errors, extendedResult.parseDiagnostics);
             return undefined;
         }
-        // Return true if the given node is a declaration of a nested block scoped entity with a name that either hides an
-        // existing name or might hide a name when compiled downlevel
-        function isDeclarationWithCollidingName(node) {
-            node = ts.getParseTreeNode(node, ts.isDeclaration);
-            if (node) {
-                var symbol = getSymbolOfNode(node);
-                if (symbol) {
-                    return isSymbolOfDeclarationWithCollidingName(symbol);
+        var extendedDirname = ts.getDirectoryPath(extendedConfigPath);
+        var extendedConfig = parseConfig(/*json*/ undefined, extendedResult, host, extendedDirname, ts.getBaseFileName(extendedConfigPath), resolutionStack, errors);
+        if (sourceFile) {
+            (_a = sourceFile.extendedSourceFiles).push.apply(_a, extendedResult.extendedSourceFiles);
+        }
+        if (isSuccessfulParsedTsconfig(extendedConfig)) {
+            // Update the paths to reflect base path
+            var relativeDifference_1 = ts.convertToRelativePath(extendedDirname, basePath, getCanonicalFileName);
+            var updatePath_1 = function (path) { return ts.isRootedDiskPath(path) ? path : ts.combinePaths(relativeDifference_1, path); };
+            var mapPropertiesInRawIfNotUndefined = function (propertyName) {
+                if (raw_2[propertyName]) {
+                    raw_2[propertyName] = ts.map(raw_2[propertyName], updatePath_1);
                 }
+            };
+            var raw_2 = extendedConfig.raw;
+            mapPropertiesInRawIfNotUndefined("include");
+            mapPropertiesInRawIfNotUndefined("exclude");
+            mapPropertiesInRawIfNotUndefined("files");
+        }
+        return extendedConfig;
+        var _a;
+    }
+    function convertCompileOnSaveOptionFromJson(jsonOption, basePath, errors) {
+        if (!ts.hasProperty(jsonOption, ts.compileOnSaveCommandLineOption.name)) {
+            return undefined;
+        }
+        var result = convertJsonOption(ts.compileOnSaveCommandLineOption, jsonOption["compileOnSave"], basePath, errors);
+        if (typeof result === "boolean" && result) {
+            return result;
+        }
+        return false;
+    }
+    function convertCompilerOptionsFromJson(jsonOptions, basePath, configFileName) {
+        var errors = [];
+        var options = convertCompilerOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName);
+        return { options: options, errors: errors };
+    }
+    ts.convertCompilerOptionsFromJson = convertCompilerOptionsFromJson;
+    function convertTypeAcquisitionFromJson(jsonOptions, basePath, configFileName) {
+        var errors = [];
+        var options = convertTypeAcquisitionFromJsonWorker(jsonOptions, basePath, errors, configFileName);
+        return { options: options, errors: errors };
+    }
+    ts.convertTypeAcquisitionFromJson = convertTypeAcquisitionFromJson;
+    function getDefaultCompilerOptions(configFileName) {
+        var options = ts.getBaseFileName(configFileName) === "jsconfig.json"
+            ? { allowJs: true, maxNodeModuleJsDepth: 2, allowSyntheticDefaultImports: true, skipLibCheck: true }
+            : {};
+        return options;
+    }
+    function convertCompilerOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName) {
+        var options = getDefaultCompilerOptions(configFileName);
+        convertOptionsFromJson(ts.optionDeclarations, jsonOptions, basePath, options, ts.Diagnostics.Unknown_compiler_option_0, errors);
+        return options;
+    }
+    function getDefaultTypeAcquisition(configFileName) {
+        var options = { enable: ts.getBaseFileName(configFileName) === "jsconfig.json", include: [], exclude: [] };
+        return options;
+    }
+    function convertTypeAcquisitionFromJsonWorker(jsonOptions, basePath, errors, configFileName) {
+        var options = getDefaultTypeAcquisition(configFileName);
+        var typeAcquisition = convertEnableAutoDiscoveryToEnable(jsonOptions);
+        convertOptionsFromJson(ts.typeAcquisitionDeclarations, typeAcquisition, basePath, options, ts.Diagnostics.Unknown_type_acquisition_option_0, errors);
+        return options;
+    }
+    function convertOptionsFromJson(optionDeclarations, jsonOptions, basePath, defaultOptions, diagnosticMessage, errors) {
+        if (!jsonOptions) {
+            return;
+        }
+        var optionNameMap = commandLineOptionsToMap(optionDeclarations);
+        for (var id in jsonOptions) {
+            var opt = optionNameMap.get(id);
+            if (opt) {
+                defaultOptions[opt.name] = convertJsonOption(opt, jsonOptions[id], basePath, errors);
+            }
+            else {
+                errors.push(ts.createCompilerDiagnostic(diagnosticMessage, id));
             }
-            return false;
         }
-        function isValueAliasDeclaration(node) {
-            node = ts.getParseTreeNode(node);
-            if (node === undefined) {
-                // A synthesized node comes from an emit transformation and is always a value.
-                return true;
+    }
+    function convertJsonOption(opt, value, basePath, errors) {
+        if (isCompilerOptionsValue(opt, value)) {
+            var optType = opt.type;
+            if (optType === "list" && ts.isArray(value)) {
+                return convertJsonOptionOfListType(opt, value, basePath, errors);
             }
-            switch (node.kind) {
-                case 229 /* ImportEqualsDeclaration */:
-                case 231 /* ImportClause */:
-                case 232 /* NamespaceImport */:
-                case 234 /* ImportSpecifier */:
-                case 238 /* ExportSpecifier */:
-                    return isAliasResolvedToValue(getSymbolOfNode(node) || unknownSymbol);
-                case 236 /* ExportDeclaration */:
-                    var exportClause = node.exportClause;
-                    return exportClause && ts.forEach(exportClause.elements, isValueAliasDeclaration);
-                case 235 /* ExportAssignment */:
-                    return node.expression
-                        && node.expression.kind === 69 /* Identifier */
-                        ? isAliasResolvedToValue(getSymbolOfNode(node) || unknownSymbol)
-                        : true;
+            else if (typeof optType !== "string") {
+                return convertJsonOptionOfCustomType(opt, value, errors);
             }
-            return false;
+            return normalizeNonListOptionValue(opt, basePath, value);
         }
-        function isTopLevelValueImportEqualsWithEntityName(node) {
-            node = ts.getParseTreeNode(node, ts.isImportEqualsDeclaration);
-            if (node === undefined || node.parent.kind !== 256 /* SourceFile */ || !ts.isInternalModuleImportEqualsDeclaration(node)) {
-                // parent is not source file or it is not reference to internal module
-                return false;
+        else {
+            errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1, opt.name, getCompilerOptionValueTypeString(opt)));
+        }
+    }
+    function normalizeOptionValue(option, basePath, value) {
+        if (option.type === "list") {
+            var listOption_1 = option;
+            if (listOption_1.element.isFilePath || typeof listOption_1.element.type !== "string") {
+                return ts.filter(ts.map(value, function (v) { return normalizeOptionValue(listOption_1.element, basePath, v); }), function (v) { return !!v; });
             }
-            var isValue = isAliasResolvedToValue(getSymbolOfNode(node));
-            return isValue && node.moduleReference && !ts.nodeIsMissing(node.moduleReference);
+            return value;
         }
-        function isAliasResolvedToValue(symbol) {
-            var target = resolveAlias(symbol);
-            if (target === unknownSymbol) {
-                return true;
+        else if (typeof option.type !== "string") {
+            return option.type.get(value);
+        }
+        return normalizeNonListOptionValue(option, basePath, value);
+    }
+    function normalizeNonListOptionValue(option, basePath, value) {
+        if (option.isFilePath) {
+            value = ts.normalizePath(ts.combinePaths(basePath, value));
+            if (value === "") {
+                value = ".";
             }
-            // const enums and modules that contain only const enums are not considered values from the emit perspective
-            // unless 'preserveConstEnums' option is set to true
-            return target.flags & 107455 /* Value */ &&
-                (compilerOptions.preserveConstEnums || !isConstEnumOrConstEnumOnlyModule(target));
         }
-        function isConstEnumOrConstEnumOnlyModule(s) {
-            return isConstEnumSymbol(s) || s.constEnumOnlyModule;
+        return value;
+    }
+    function convertJsonOptionOfCustomType(opt, value, errors) {
+        var key = value.toLowerCase();
+        var val = opt.type.get(key);
+        if (val !== undefined) {
+            return val;
         }
-        function isReferencedAliasDeclaration(node, checkChildren) {
-            node = ts.getParseTreeNode(node);
-            // Purely synthesized nodes are always emitted.
-            if (node === undefined) {
-                return true;
+        else {
+            errors.push(createCompilerDiagnosticForInvalidCustomType(opt));
+        }
+    }
+    function convertJsonOptionOfListType(option, values, basePath, errors) {
+        return ts.filter(ts.map(values, function (v) { return convertJsonOption(option.element, v, basePath, errors); }), function (v) { return !!v; });
+    }
+    function trimString(s) {
+        return typeof s.trim === "function" ? s.trim() : s.replace(/^[\s]+|[\s]+$/g, "");
+    }
+    /**
+     * Tests for a path that ends in a recursive directory wildcard.
+     * Matches **, \**, **\, and \**\, but not a**b.
+     *
+     * NOTE: used \ in place of / above to avoid issues with multiline comments.
+     *
+     * Breakdown:
+     *  (^|\/)      # matches either the beginning of the string or a directory separator.
+     *  \*\*        # matches the recursive directory wildcard "**".
+     *  \/?$        # matches an optional trailing directory separator at the end of the string.
+     */
+    var invalidTrailingRecursionPattern = /(^|\/)\*\*\/?$/;
+    /**
+     * Tests for a path with multiple recursive directory wildcards.
+     * Matches **\** and **\a\**, but not **\a**b.
+     *
+     * NOTE: used \ in place of / above to avoid issues with multiline comments.
+     *
+     * Breakdown:
+     *  (^|\/)      # matches either the beginning of the string or a directory separator.
+     *  \*\*\/      # matches a recursive directory wildcard "**" followed by a directory separator.
+     *  (.*\/)?     # optionally matches any number of characters followed by a directory separator.
+     *  \*\*        # matches a recursive directory wildcard "**"
+     *  ($|\/)      # matches either the end of the string or a directory separator.
+     */
+    var invalidMultipleRecursionPatterns = /(^|\/)\*\*\/(.*\/)?\*\*($|\/)/;
+    /**
+     * Tests for a path where .. appears after a recursive directory wildcard.
+     * Matches **\..\*, **\a\..\*, and **\.., but not ..\**\*
+     *
+     * NOTE: used \ in place of / above to avoid issues with multiline comments.
+     *
+     * Breakdown:
+     *  (^|\/)      # matches either the beginning of the string or a directory separator.
+     *  \*\*\/      # matches a recursive directory wildcard "**" followed by a directory separator.
+     *  (.*\/)?     # optionally matches any number of characters followed by a directory separator.
+     *  \.\.        # matches a parent directory path component ".."
+     *  ($|\/)      # matches either the end of the string or a directory separator.
+     */
+    var invalidDotDotAfterRecursiveWildcardPattern = /(^|\/)\*\*\/(.*\/)?\.\.($|\/)/;
+    /**
+     * Tests for a path containing a wildcard character in a directory component of the path.
+     * Matches \*\, \?\, and \a*b\, but not \a\ or \a\*.
+     *
+     * NOTE: used \ in place of / above to avoid issues with multiline comments.
+     *
+     * Breakdown:
+     *  \/          # matches a directory separator.
+     *  [^/]*?      # matches any number of characters excluding directory separators (non-greedy).
+     *  [*?]        # matches either a wildcard character (* or ?)
+     *  [^/]*       # matches any number of characters excluding directory separators (greedy).
+     *  \/          # matches a directory separator.
+     */
+    var watchRecursivePattern = /\/[^/]*?[*?][^/]*\//;
+    /**
+     * Matches the portion of a wildcard path that does not contain wildcards.
+     * Matches \a of \a\*, or \a\b\c of \a\b\c\?\d.
+     *
+     * NOTE: used \ in place of / above to avoid issues with multiline comments.
+     *
+     * Breakdown:
+     *  ^                   # matches the beginning of the string
+     *  [^*?]*              # matches any number of non-wildcard characters
+     *  (?=\/[^/]*[*?])     # lookahead that matches a directory separator followed by
+     *                      # a path component that contains at least one wildcard character (* or ?).
+     */
+    var wildcardDirectoryPattern = /^[^*?]*(?=\/[^/]*[*?])/;
+    /**
+     * Expands an array of file specifications.
+     *
+     * @param fileNames The literal file names to include.
+     * @param include The wildcard file specifications to include.
+     * @param exclude The wildcard file specifications to exclude.
+     * @param basePath The base path for any relative file specifications.
+     * @param options Compiler options.
+     * @param host The host used to resolve files and directories.
+     * @param errors An array for diagnostic reporting.
+     */
+    function matchFileNames(fileNames, include, exclude, basePath, options, host, errors, extraFileExtensions, jsonSourceFile) {
+        basePath = ts.normalizePath(basePath);
+        // The exclude spec list is converted into a regular expression, which allows us to quickly
+        // test whether a file or directory should be excluded before recursively traversing the
+        // file system.
+        var keyMapper = host.useCaseSensitiveFileNames ? caseSensitiveKeyMapper : caseInsensitiveKeyMapper;
+        // Literal file names (provided via the "files" array in tsconfig.json) are stored in a
+        // file map with a possibly case insensitive key. We use this map later when when including
+        // wildcard paths.
+        var literalFileMap = ts.createMap();
+        // Wildcard paths (provided via the "includes" array in tsconfig.json) are stored in a
+        // file map with a possibly case insensitive key. We use this map to store paths matched
+        // via wildcard, and to handle extension priority.
+        var wildcardFileMap = ts.createMap();
+        if (include) {
+            include = validateSpecs(include, errors, /*allowTrailingRecursion*/ false, jsonSourceFile, "include");
+        }
+        if (exclude) {
+            exclude = validateSpecs(exclude, errors, /*allowTrailingRecursion*/ true, jsonSourceFile, "exclude");
+        }
+        // Wildcard directories (provided as part of a wildcard path) are stored in a
+        // file map that marks whether it was a regular wildcard match (with a `*` or `?` token),
+        // or a recursive directory. This information is used by filesystem watchers to monitor for
+        // new entries in these paths.
+        var wildcardDirectories = getWildcardDirectories(include, exclude, basePath, host.useCaseSensitiveFileNames);
+        // Rather than requery this for each file and filespec, we query the supported extensions
+        // once and store it on the expansion context.
+        var supportedExtensions = ts.getSupportedExtensions(options, extraFileExtensions);
+        // Literal files are always included verbatim. An "include" or "exclude" specification cannot
+        // remove a literal file.
+        if (fileNames) {
+            for (var _i = 0, fileNames_1 = fileNames; _i < fileNames_1.length; _i++) {
+                var fileName = fileNames_1[_i];
+                var file = ts.combinePaths(basePath, fileName);
+                literalFileMap.set(keyMapper(file), file);
             }
-            if (ts.isAliasSymbolDeclaration(node)) {
-                var symbol = getSymbolOfNode(node);
-                if (symbol && getSymbolLinks(symbol).referenced) {
-                    return true;
+        }
+        if (include && include.length > 0) {
+            for (var _a = 0, _b = host.readDirectory(basePath, supportedExtensions, exclude, include); _a < _b.length; _a++) {
+                var file = _b[_a];
+                // If we have already included a literal or wildcard path with a
+                // higher priority extension, we should skip this file.
+                //
+                // This handles cases where we may encounter both <file>.ts and
+                // <file>.d.ts (or <file>.js if "allowJs" is enabled) in the same
+                // directory when they are compilation outputs.
+                if (hasFileWithHigherPriorityExtension(file, literalFileMap, wildcardFileMap, supportedExtensions, keyMapper)) {
+                    continue;
+                }
+                // We may have included a wildcard path with a lower priority
+                // extension due to the user-defined order of entries in the
+                // "include" array. If there is a lower priority extension in the
+                // same directory, we should remove it.
+                removeWildcardFilesWithLowerPriorityExtension(file, wildcardFileMap, supportedExtensions, keyMapper);
+                var key = keyMapper(file);
+                if (!literalFileMap.has(key) && !wildcardFileMap.has(key)) {
+                    wildcardFileMap.set(key, file);
                 }
             }
-            if (checkChildren) {
-                return ts.forEachChild(node, function (node) { return isReferencedAliasDeclaration(node, checkChildren); });
+        }
+        var literalFiles = ts.arrayFrom(literalFileMap.values());
+        var wildcardFiles = ts.arrayFrom(wildcardFileMap.values());
+        return {
+            fileNames: literalFiles.concat(wildcardFiles),
+            wildcardDirectories: wildcardDirectories
+        };
+    }
+    function validateSpecs(specs, errors, allowTrailingRecursion, jsonSourceFile, specKey) {
+        var validSpecs = [];
+        for (var _i = 0, specs_1 = specs; _i < specs_1.length; _i++) {
+            var spec = specs_1[_i];
+            if (!allowTrailingRecursion && invalidTrailingRecursionPattern.test(spec)) {
+                errors.push(createDiagnostic(ts.Diagnostics.File_specification_cannot_end_in_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0, spec));
+            }
+            else if (invalidMultipleRecursionPatterns.test(spec)) {
+                errors.push(createDiagnostic(ts.Diagnostics.File_specification_cannot_contain_multiple_recursive_directory_wildcards_Asterisk_Asterisk_Colon_0, spec));
+            }
+            else if (invalidDotDotAfterRecursiveWildcardPattern.test(spec)) {
+                errors.push(createDiagnostic(ts.Diagnostics.File_specification_cannot_contain_a_parent_directory_that_appears_after_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0, spec));
+            }
+            else {
+                validSpecs.push(spec);
             }
-            return false;
         }
-        function isImplementationOfOverload(node) {
-            if (ts.nodeIsPresent(node.body)) {
-                var symbol = getSymbolOfNode(node);
-                var signaturesOfSymbol = getSignaturesOfSymbol(symbol);
-                // If this function body corresponds to function with multiple signature, it is implementation of overload
-                // e.g.: function foo(a: string): string;
-                //       function foo(a: number): number;
-                //       function foo(a: any) { // This is implementation of the overloads
-                //           return a;
-                //       }
-                return signaturesOfSymbol.length > 1 ||
-                    // If there is single signature for the symbol, it is overload if that signature isn't coming from the node
-                    // e.g.: function foo(a: string): string;
-                    //       function foo(a: any) { // This is implementation of the overloads
-                    //           return a;
-                    //       }
-                    (signaturesOfSymbol.length === 1 && signaturesOfSymbol[0].declaration !== node);
+        return validSpecs;
+        function createDiagnostic(message, spec) {
+            if (jsonSourceFile && jsonSourceFile.jsonObject) {
+                for (var _i = 0, _a = ts.getPropertyAssignment(jsonSourceFile.jsonObject, specKey); _i < _a.length; _i++) {
+                    var property = _a[_i];
+                    if (ts.isArrayLiteralExpression(property.initializer)) {
+                        for (var _b = 0, _c = property.initializer.elements; _b < _c.length; _b++) {
+                            var element = _c[_b];
+                            if (element.kind === 9 /* StringLiteral */ && element.text === spec) {
+                                return ts.createDiagnosticForNodeInSourceFile(jsonSourceFile, element, message, spec);
+                            }
+                        }
+                    }
+                }
             }
-            return false;
+            return ts.createCompilerDiagnostic(message, spec);
         }
-        function getNodeCheckFlags(node) {
-            node = ts.getParseTreeNode(node);
-            return node ? getNodeLinks(node).flags : undefined;
+    }
+    /**
+     * Gets directories in a set of include patterns that should be watched for changes.
+     */
+    function getWildcardDirectories(include, exclude, path, useCaseSensitiveFileNames) {
+        // We watch a directory recursively if it contains a wildcard anywhere in a directory segment
+        // of the pattern:
+        //
+        //  /a/b/**/d   - Watch /a/b recursively to catch changes to any d in any subfolder recursively
+        //  /a/b/*/d    - Watch /a/b recursively to catch any d in any immediate subfolder, even if a new subfolder is added
+        //  /a/b        - Watch /a/b recursively to catch changes to anything in any recursive subfoler
+        //
+        // We watch a directory without recursion if it contains a wildcard in the file segment of
+        // the pattern:
+        //
+        //  /a/b/*      - Watch /a/b directly to catch any new file
+        //  /a/b/a?z    - Watch /a/b directly to catch any new file matching a?z
+        var rawExcludeRegex = ts.getRegularExpressionForWildcard(exclude, path, "exclude");
+        var excludeRegex = rawExcludeRegex && new RegExp(rawExcludeRegex, useCaseSensitiveFileNames ? "" : "i");
+        var wildcardDirectories = {};
+        if (include !== undefined) {
+            var recursiveKeys = [];
+            for (var _i = 0, include_1 = include; _i < include_1.length; _i++) {
+                var file = include_1[_i];
+                var spec = ts.normalizePath(ts.combinePaths(path, file));
+                if (excludeRegex && excludeRegex.test(spec)) {
+                    continue;
+                }
+                var match = getWildcardDirectoryFromSpec(spec, useCaseSensitiveFileNames);
+                if (match) {
+                    var key = match.key, flags = match.flags;
+                    var existingFlags = wildcardDirectories[key];
+                    if (existingFlags === undefined || existingFlags < flags) {
+                        wildcardDirectories[key] = flags;
+                        if (flags === 1 /* Recursive */) {
+                            recursiveKeys.push(key);
+                        }
+                    }
+                }
+            }
+            // Remove any subpaths under an existing recursively watched directory.
+            for (var key in wildcardDirectories) {
+                if (ts.hasProperty(wildcardDirectories, key)) {
+                    for (var _a = 0, recursiveKeys_1 = recursiveKeys; _a < recursiveKeys_1.length; _a++) {
+                        var recursiveKey = recursiveKeys_1[_a];
+                        if (key !== recursiveKey && ts.containsPath(recursiveKey, key, path, !useCaseSensitiveFileNames)) {
+                            delete wildcardDirectories[key];
+                        }
+                    }
+                }
+            }
+        }
+        return wildcardDirectories;
+    }
+    function getWildcardDirectoryFromSpec(spec, useCaseSensitiveFileNames) {
+        var match = wildcardDirectoryPattern.exec(spec);
+        if (match) {
+            return {
+                key: useCaseSensitiveFileNames ? match[0] : match[0].toLowerCase(),
+                flags: watchRecursivePattern.test(spec) ? 1 /* Recursive */ : 0 /* None */
+            };
         }
-        function getEnumMemberValue(node) {
-            computeEnumMemberValues(node.parent);
-            return getNodeLinks(node).enumMemberValue;
+        if (ts.isImplicitGlob(spec)) {
+            return { key: spec, flags: 1 /* Recursive */ };
         }
-        function getConstantValue(node) {
-            if (node.kind === 255 /* EnumMember */) {
-                return getEnumMemberValue(node);
+        return undefined;
+    }
+    /**
+     * Determines whether a literal or wildcard file has already been included that has a higher
+     * extension priority.
+     *
+     * @param file The path to the file.
+     * @param extensionPriority The priority of the extension.
+     * @param context The expansion context.
+     */
+    function hasFileWithHigherPriorityExtension(file, literalFiles, wildcardFiles, extensions, keyMapper) {
+        var extensionPriority = ts.getExtensionPriority(file, extensions);
+        var adjustedExtensionPriority = ts.adjustExtensionPriority(extensionPriority, extensions);
+        for (var i = 0 /* Highest */; i < adjustedExtensionPriority; i++) {
+            var higherPriorityExtension = extensions[i];
+            var higherPriorityPath = keyMapper(ts.changeExtension(file, higherPriorityExtension));
+            if (literalFiles.has(higherPriorityPath) || wildcardFiles.has(higherPriorityPath)) {
+                return true;
             }
-            var symbol = getNodeLinks(node).resolvedSymbol;
-            if (symbol && (symbol.flags & 8 /* EnumMember */)) {
-                // inline property\index accesses only for const enums
-                if (ts.isConstEnumDeclaration(symbol.valueDeclaration.parent)) {
-                    return getEnumMemberValue(symbol.valueDeclaration);
+        }
+        return false;
+    }
+    /**
+     * Removes files included via wildcard expansion with a lower extension priority that have
+     * already been included.
+     *
+     * @param file The path to the file.
+     * @param extensionPriority The priority of the extension.
+     * @param context The expansion context.
+     */
+    function removeWildcardFilesWithLowerPriorityExtension(file, wildcardFiles, extensions, keyMapper) {
+        var extensionPriority = ts.getExtensionPriority(file, extensions);
+        var nextExtensionPriority = ts.getNextLowestExtensionPriority(extensionPriority, extensions);
+        for (var i = nextExtensionPriority; i < extensions.length; i++) {
+            var lowerPriorityExtension = extensions[i];
+            var lowerPriorityPath = keyMapper(ts.changeExtension(file, lowerPriorityExtension));
+            wildcardFiles.delete(lowerPriorityPath);
+        }
+    }
+    /**
+     * Gets a case sensitive key.
+     *
+     * @param key The original key.
+     */
+    function caseSensitiveKeyMapper(key) {
+        return key;
+    }
+    /**
+     * Gets a case insensitive key.
+     *
+     * @param key The original key.
+     */
+    function caseInsensitiveKeyMapper(key) {
+        return key.toLowerCase();
+    }
+    /**
+     * Produces a cleaned version of compiler options with personally identifiying info (aka, paths) removed.
+     * Also converts enum values back to strings.
+     */
+    /* @internal */
+    function convertCompilerOptionsForTelemetry(opts) {
+        var out = {};
+        for (var key in opts) {
+            if (opts.hasOwnProperty(key)) {
+                var type = getOptionFromName(key);
+                if (type !== undefined) {
+                    out[key] = getOptionValueWithEmptyStrings(opts[key], type);
                 }
             }
-            return undefined;
         }
-        function isFunctionType(type) {
-            return type.flags & 2588672 /* ObjectType */ && getSignaturesOfType(type, 0 /* Call */).length > 0;
+        return out;
+    }
+    ts.convertCompilerOptionsForTelemetry = convertCompilerOptionsForTelemetry;
+    function getOptionValueWithEmptyStrings(value, option) {
+        switch (option.type) {
+            case "object":
+                return "";
+            case "string":
+                return "";
+            case "number":
+                return typeof value === "number" ? value : "";
+            case "boolean":
+                return typeof value === "boolean" ? value : "";
+            case "list":
+                var elementType_1 = option.element;
+                return ts.isArray(value) ? value.map(function (v) { return getOptionValueWithEmptyStrings(v, elementType_1); }) : "";
+            default:
+                return ts.forEachEntry(option.type, function (optionEnumValue, optionStringValue) {
+                    if (optionEnumValue === value) {
+                        return optionStringValue;
+                    }
+                });
         }
-        function getTypeReferenceSerializationKind(typeName, location) {
-            // Resolve the symbol as a value to ensure the type can be reached at runtime during emit.
-            var valueSymbol = resolveEntityName(typeName, 107455 /* Value */, /*ignoreErrors*/ true, /*dontResolveAlias*/ false, location);
-            var globalPromiseSymbol = tryGetGlobalPromiseConstructorSymbol();
-            if (globalPromiseSymbol && valueSymbol === globalPromiseSymbol) {
-                return ts.TypeReferenceSerializationKind.Promise;
-            }
-            var constructorType = valueSymbol ? getTypeOfSymbol(valueSymbol) : undefined;
-            if (constructorType && isConstructorType(constructorType)) {
-                return ts.TypeReferenceSerializationKind.TypeWithConstructSignatureAndValue;
-            }
-            // Resolve the symbol as a type so that we can provide a more useful hint for the type serializer.
-            var typeSymbol = resolveEntityName(typeName, 793064 /* Type */, /*ignoreErrors*/ true, /*dontResolveAlias*/ false, location);
-            // We might not be able to resolve type symbol so use unknown type in that case (eg error case)
-            if (!typeSymbol) {
-                return ts.TypeReferenceSerializationKind.ObjectType;
-            }
-            var type = getDeclaredTypeOfSymbol(typeSymbol);
-            if (type === unknownType) {
-                return ts.TypeReferenceSerializationKind.Unknown;
-            }
-            else if (type.flags & 1 /* Any */) {
-                return ts.TypeReferenceSerializationKind.ObjectType;
-            }
-            else if (isTypeOfKind(type, 1024 /* Void */ | 6144 /* Nullable */ | 8192 /* Never */)) {
-                return ts.TypeReferenceSerializationKind.VoidNullableOrNeverType;
-            }
-            else if (isTypeOfKind(type, 136 /* BooleanLike */)) {
-                return ts.TypeReferenceSerializationKind.BooleanType;
-            }
-            else if (isTypeOfKind(type, 340 /* NumberLike */)) {
-                return ts.TypeReferenceSerializationKind.NumberLikeType;
-            }
-            else if (isTypeOfKind(type, 34 /* StringLike */)) {
-                return ts.TypeReferenceSerializationKind.StringLikeType;
+    }
+})(ts || (ts = {}));
+/// <reference path="checker.ts"/>
+/* @internal */
+var ts;
+(function (ts) {
+    function getDeclarationDiagnostics(host, resolver, targetSourceFile) {
+        var declarationDiagnostics = ts.createDiagnosticCollection();
+        ts.forEachEmittedFile(host, getDeclarationDiagnosticsFromFile, targetSourceFile);
+        return declarationDiagnostics.getDiagnostics(targetSourceFile ? targetSourceFile.fileName : undefined);
+        function getDeclarationDiagnosticsFromFile(_a, sourceFileOrBundle) {
+            var declarationFilePath = _a.declarationFilePath;
+            emitDeclarations(host, resolver, declarationDiagnostics, declarationFilePath, sourceFileOrBundle, /*emitOnlyDtsFiles*/ false);
+        }
+    }
+    ts.getDeclarationDiagnostics = getDeclarationDiagnostics;
+    function emitDeclarations(host, resolver, emitterDiagnostics, declarationFilePath, sourceFileOrBundle, emitOnlyDtsFiles) {
+        var sourceFiles = sourceFileOrBundle.kind === 266 /* Bundle */ ? sourceFileOrBundle.sourceFiles : [sourceFileOrBundle];
+        var isBundledEmit = sourceFileOrBundle.kind === 266 /* Bundle */;
+        var newLine = host.getNewLine();
+        var compilerOptions = host.getCompilerOptions();
+        var write;
+        var writeLine;
+        var increaseIndent;
+        var decreaseIndent;
+        var writeTextOfNode;
+        var writer;
+        createAndSetNewTextWriterWithSymbolWriter();
+        var enclosingDeclaration;
+        var resultHasExternalModuleIndicator;
+        var currentText;
+        var currentLineMap;
+        var currentIdentifiers;
+        var isCurrentFileExternalModule;
+        var reportedDeclarationError = false;
+        var errorNameNode;
+        var emitJsDocComments = compilerOptions.removeComments ? ts.noop : writeJsDocComments;
+        var emit = compilerOptions.stripInternal ? stripInternal : emitNode;
+        var needsDeclare = true;
+        var moduleElementDeclarationEmitInfo = [];
+        var asynchronousSubModuleDeclarationEmitInfo;
+        // Contains the reference paths that needs to go in the declaration file.
+        // Collecting this separately because reference paths need to be first thing in the declaration file
+        // and we could be collecting these paths from multiple files into single one with --out option
+        var referencesOutput = "";
+        var usedTypeDirectiveReferences;
+        // Emit references corresponding to each file
+        var emittedReferencedFiles = [];
+        var addedGlobalFileReference = false;
+        var allSourcesModuleElementDeclarationEmitInfo = [];
+        ts.forEach(sourceFiles, function (sourceFile) {
+            // Dont emit for javascript file
+            if (ts.isSourceFileJavaScript(sourceFile)) {
+                return;
             }
-            else if (isTupleType(type)) {
-                return ts.TypeReferenceSerializationKind.ArrayLikeType;
+            // Check what references need to be added
+            if (!compilerOptions.noResolve) {
+                ts.forEach(sourceFile.referencedFiles, function (fileReference) {
+                    var referencedFile = ts.tryResolveScriptReference(host, sourceFile, fileReference);
+                    // Emit reference in dts, if the file reference was not already emitted
+                    if (referencedFile && !ts.contains(emittedReferencedFiles, referencedFile)) {
+                        // Add a reference to generated dts file,
+                        // global file reference is added only
+                        //  - if it is not bundled emit (because otherwise it would be self reference)
+                        //  - and it is not already added
+                        if (writeReferencePath(referencedFile, !isBundledEmit && !addedGlobalFileReference, emitOnlyDtsFiles)) {
+                            addedGlobalFileReference = true;
+                        }
+                        emittedReferencedFiles.push(referencedFile);
+                    }
+                });
             }
-            else if (isTypeOfKind(type, 512 /* ESSymbol */)) {
-                return ts.TypeReferenceSerializationKind.ESSymbolType;
+            resultHasExternalModuleIndicator = false;
+            if (!isBundledEmit || !ts.isExternalModule(sourceFile)) {
+                needsDeclare = true;
+                emitSourceFile(sourceFile);
             }
-            else if (isFunctionType(type)) {
-                return ts.TypeReferenceSerializationKind.TypeWithCallSignature;
+            else if (ts.isExternalModule(sourceFile)) {
+                needsDeclare = false;
+                write("declare module \"" + ts.getResolvedExternalModuleName(host, sourceFile) + "\" {");
+                writeLine();
+                increaseIndent();
+                emitSourceFile(sourceFile);
+                decreaseIndent();
+                write("}");
+                writeLine();
             }
-            else if (isArrayType(type)) {
-                return ts.TypeReferenceSerializationKind.ArrayLikeType;
+            // create asynchronous output for the importDeclarations
+            if (moduleElementDeclarationEmitInfo.length) {
+                var oldWriter = writer;
+                ts.forEach(moduleElementDeclarationEmitInfo, function (aliasEmitInfo) {
+                    if (aliasEmitInfo.isVisible && !aliasEmitInfo.asynchronousOutput) {
+                        ts.Debug.assert(aliasEmitInfo.node.kind === 238 /* ImportDeclaration */);
+                        createAndSetNewTextWriterWithSymbolWriter();
+                        ts.Debug.assert(aliasEmitInfo.indent === 0 || (aliasEmitInfo.indent === 1 && isBundledEmit));
+                        for (var i = 0; i < aliasEmitInfo.indent; i++) {
+                            increaseIndent();
+                        }
+                        writeImportDeclaration(aliasEmitInfo.node);
+                        aliasEmitInfo.asynchronousOutput = writer.getText();
+                        for (var i = 0; i < aliasEmitInfo.indent; i++) {
+                            decreaseIndent();
+                        }
+                    }
+                });
+                setWriter(oldWriter);
+                allSourcesModuleElementDeclarationEmitInfo = allSourcesModuleElementDeclarationEmitInfo.concat(moduleElementDeclarationEmitInfo);
+                moduleElementDeclarationEmitInfo = [];
             }
-            else {
-                return ts.TypeReferenceSerializationKind.ObjectType;
+            if (!isBundledEmit && ts.isExternalModule(sourceFile) && sourceFile.moduleAugmentations.length && !resultHasExternalModuleIndicator) {
+                // if file was external module with augmentations - this fact should be preserved in .d.ts as well.
+                // in case if we didn't write any external module specifiers in .d.ts we need to emit something
+                // that will force compiler to think that this file is an external module - 'export {}' is a reasonable choice here.
+                write("export {};");
+                writeLine();
             }
+        });
+        if (usedTypeDirectiveReferences) {
+            ts.forEachKey(usedTypeDirectiveReferences, function (directive) {
+                referencesOutput += "/// <reference types=\"" + directive + "\" />" + newLine;
+            });
         }
-        function writeTypeOfDeclaration(declaration, enclosingDeclaration, flags, writer) {
-            // Get type of the symbol if this is the valid symbol otherwise get type at location
-            var symbol = getSymbolOfNode(declaration);
-            var type = symbol && !(symbol.flags & (2048 /* TypeLiteral */ | 131072 /* Signature */))
-                ? getWidenedLiteralType(getTypeOfSymbol(symbol))
-                : unknownType;
-            getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
-        }
-        function writeReturnTypeOfSignatureDeclaration(signatureDeclaration, enclosingDeclaration, flags, writer) {
-            var signature = getSignatureFromDeclaration(signatureDeclaration);
-            getSymbolDisplayBuilder().buildTypeDisplay(getReturnTypeOfSignature(signature), writer, enclosingDeclaration, flags);
-        }
-        function writeTypeOfExpression(expr, enclosingDeclaration, flags, writer) {
-            var type = getWidenedType(getTypeOfExpression(expr));
-            getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
-        }
-        function writeBaseConstructorTypeOfClass(node, enclosingDeclaration, flags, writer) {
-            var classType = getDeclaredTypeOfSymbol(getSymbolOfNode(node));
-            resolveBaseTypesOfClass(classType);
-            var baseType = classType.resolvedBaseTypes.length ? classType.resolvedBaseTypes[0] : unknownType;
-            getSymbolDisplayBuilder().buildTypeDisplay(baseType, writer, enclosingDeclaration, flags);
-        }
-        function hasGlobalName(name) {
-            return !!globals[name];
-        }
-        function getReferencedValueSymbol(reference, startInDeclarationContainer) {
-            var resolvedSymbol = getNodeLinks(reference).resolvedSymbol;
-            if (resolvedSymbol) {
-                return resolvedSymbol;
-            }
-            var location = reference;
-            if (startInDeclarationContainer) {
-                // When resolving the name of a declaration as a value, we need to start resolution
-                // at a point outside of the declaration.
-                var parent_14 = reference.parent;
-                if (ts.isDeclaration(parent_14) && reference === parent_14.name) {
-                    location = getDeclarationContainer(parent_14);
-                }
-            }
-            return resolveName(location, reference.text, 107455 /* Value */ | 1048576 /* ExportValue */ | 8388608 /* Alias */, /*nodeNotFoundMessage*/ undefined, /*nameArg*/ undefined);
+        return {
+            reportedDeclarationError: reportedDeclarationError,
+            moduleElementDeclarationEmitInfo: allSourcesModuleElementDeclarationEmitInfo,
+            synchronousDeclarationOutput: writer.getText(),
+            referencesOutput: referencesOutput,
+        };
+        function hasInternalAnnotation(range) {
+            var comment = currentText.substring(range.pos, range.end);
+            return comment.indexOf("@internal") >= 0;
         }
-        function getReferencedValueDeclaration(reference) {
-            if (!ts.isGeneratedIdentifier(reference)) {
-                reference = ts.getParseTreeNode(reference, ts.isIdentifier);
-                if (reference) {
-                    var symbol = getReferencedValueSymbol(reference);
-                    if (symbol) {
-                        return getExportSymbolOfValueSymbolIfExported(symbol).valueDeclaration;
-                    }
+        function stripInternal(node) {
+            if (node) {
+                var leadingCommentRanges = ts.getLeadingCommentRanges(currentText, node.pos);
+                if (ts.forEach(leadingCommentRanges, hasInternalAnnotation)) {
+                    return;
                 }
+                emitNode(node);
             }
-            return undefined;
         }
-        function isLiteralConstDeclaration(node) {
-            if (ts.isConst(node)) {
-                var type = getTypeOfSymbol(getSymbolOfNode(node));
-                return !!(type.flags & 96 /* StringOrNumberLiteral */ && type.flags & 16777216 /* FreshLiteral */);
-            }
-            return false;
+        function createAndSetNewTextWriterWithSymbolWriter() {
+            var writer = ts.createTextWriter(newLine);
+            writer.trackSymbol = trackSymbol;
+            writer.reportInaccessibleThisError = reportInaccessibleThisError;
+            writer.reportPrivateInBaseOfClassExpression = reportPrivateInBaseOfClassExpression;
+            writer.writeKeyword = writer.write;
+            writer.writeOperator = writer.write;
+            writer.writePunctuation = writer.write;
+            writer.writeSpace = writer.write;
+            writer.writeStringLiteral = writer.writeLiteral;
+            writer.writeParameter = writer.write;
+            writer.writeProperty = writer.write;
+            writer.writeSymbol = writer.write;
+            setWriter(writer);
         }
-        function writeLiteralConstValue(node, writer) {
-            var type = getTypeOfSymbol(getSymbolOfNode(node));
-            writer.writeStringLiteral(literalTypeToString(type));
+        function setWriter(newWriter) {
+            writer = newWriter;
+            write = newWriter.write;
+            writeTextOfNode = newWriter.writeTextOfNode;
+            writeLine = newWriter.writeLine;
+            increaseIndent = newWriter.increaseIndent;
+            decreaseIndent = newWriter.decreaseIndent;
         }
-        function createResolver() {
-            // this variable and functions that use it are deliberately moved here from the outer scope
-            // to avoid scope pollution
-            var resolvedTypeReferenceDirectives = host.getResolvedTypeReferenceDirectives();
-            var fileToDirective;
-            if (resolvedTypeReferenceDirectives) {
-                // populate reverse mapping: file path -> type reference directive that was resolved to this file
-                fileToDirective = ts.createFileMap();
-                for (var key in resolvedTypeReferenceDirectives) {
-                    var resolvedDirective = resolvedTypeReferenceDirectives[key];
-                    if (!resolvedDirective) {
-                        continue;
-                    }
-                    var file = host.getSourceFile(resolvedDirective.resolvedFileName);
-                    fileToDirective.set(file.path, key);
+        function writeAsynchronousModuleElements(nodes) {
+            var oldWriter = writer;
+            ts.forEach(nodes, function (declaration) {
+                var nodeToCheck;
+                if (declaration.kind === 226 /* VariableDeclaration */) {
+                    nodeToCheck = declaration.parent.parent;
                 }
-            }
-            return {
-                getReferencedExportContainer: getReferencedExportContainer,
-                getReferencedImportDeclaration: getReferencedImportDeclaration,
-                getReferencedDeclarationWithCollidingName: getReferencedDeclarationWithCollidingName,
-                isDeclarationWithCollidingName: isDeclarationWithCollidingName,
-                isValueAliasDeclaration: isValueAliasDeclaration,
-                hasGlobalName: hasGlobalName,
-                isReferencedAliasDeclaration: isReferencedAliasDeclaration,
-                getNodeCheckFlags: getNodeCheckFlags,
-                isTopLevelValueImportEqualsWithEntityName: isTopLevelValueImportEqualsWithEntityName,
-                isDeclarationVisible: isDeclarationVisible,
-                isImplementationOfOverload: isImplementationOfOverload,
-                writeTypeOfDeclaration: writeTypeOfDeclaration,
-                writeReturnTypeOfSignatureDeclaration: writeReturnTypeOfSignatureDeclaration,
-                writeTypeOfExpression: writeTypeOfExpression,
-                writeBaseConstructorTypeOfClass: writeBaseConstructorTypeOfClass,
-                isSymbolAccessible: isSymbolAccessible,
-                isEntityNameVisible: isEntityNameVisible,
-                getConstantValue: getConstantValue,
-                collectLinkedAliases: collectLinkedAliases,
-                getReferencedValueDeclaration: getReferencedValueDeclaration,
-                getTypeReferenceSerializationKind: getTypeReferenceSerializationKind,
-                isOptionalParameter: isOptionalParameter,
-                moduleExportsSomeValue: moduleExportsSomeValue,
-                isArgumentsLocalBinding: isArgumentsLocalBinding,
-                getExternalModuleFileFromDeclaration: getExternalModuleFileFromDeclaration,
-                getTypeReferenceDirectivesForEntityName: getTypeReferenceDirectivesForEntityName,
-                getTypeReferenceDirectivesForSymbol: getTypeReferenceDirectivesForSymbol,
-                isLiteralConstDeclaration: isLiteralConstDeclaration,
-                writeLiteralConstValue: writeLiteralConstValue
-            };
-            // defined here to avoid outer scope pollution
-            function getTypeReferenceDirectivesForEntityName(node) {
-                // program does not have any files with type reference directives - bail out
-                if (!fileToDirective) {
-                    return undefined;
+                else if (declaration.kind === 241 /* NamedImports */ || declaration.kind === 242 /* ImportSpecifier */ || declaration.kind === 239 /* ImportClause */) {
+                    ts.Debug.fail("We should be getting ImportDeclaration instead to write");
                 }
-                // property access can only be used as values
-                // qualified names can only be used as types\namespaces
-                // identifiers are treated as values only if they appear in type queries
-                var meaning = (node.kind === 172 /* PropertyAccessExpression */) || (node.kind === 69 /* Identifier */ && isInTypeQuery(node))
-                    ? 107455 /* Value */ | 1048576 /* ExportValue */
-                    : 793064 /* Type */ | 1920 /* Namespace */;
-                var symbol = resolveEntityName(node, meaning, /*ignoreErrors*/ true);
-                return symbol && symbol !== unknownSymbol ? getTypeReferenceDirectivesForSymbol(symbol, meaning) : undefined;
-            }
-            // defined here to avoid outer scope pollution
-            function getTypeReferenceDirectivesForSymbol(symbol, meaning) {
-                // program does not have any files with type reference directives - bail out
-                if (!fileToDirective) {
-                    return undefined;
+                else {
+                    nodeToCheck = declaration;
                 }
-                if (!isSymbolFromTypeDeclarationFile(symbol)) {
-                    return undefined;
+                var moduleElementEmitInfo = ts.forEach(moduleElementDeclarationEmitInfo, function (declEmitInfo) { return declEmitInfo.node === nodeToCheck ? declEmitInfo : undefined; });
+                if (!moduleElementEmitInfo && asynchronousSubModuleDeclarationEmitInfo) {
+                    moduleElementEmitInfo = ts.forEach(asynchronousSubModuleDeclarationEmitInfo, function (declEmitInfo) { return declEmitInfo.node === nodeToCheck ? declEmitInfo : undefined; });
                 }
-                // check what declarations in the symbol can contribute to the target meaning
-                var typeReferenceDirectives;
-                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                    var decl = _a[_i];
-                    // check meaning of the local symbol to see if declaration needs to be analyzed further
-                    if (decl.symbol && decl.symbol.flags & meaning) {
-                        var file = ts.getSourceFileOfNode(decl);
-                        var typeReferenceDirective = fileToDirective.get(file.path);
-                        if (typeReferenceDirective) {
-                            (typeReferenceDirectives || (typeReferenceDirectives = [])).push(typeReferenceDirective);
+                // If the alias was marked as not visible when we saw its declaration, we would have saved the aliasEmitInfo, but if we haven't yet visited the alias declaration
+                // then we don't need to write it at this point. We will write it when we actually see its declaration
+                // Eg.
+                // export function bar(a: foo.Foo) { }
+                // import foo = require("foo");
+                // Writing of function bar would mark alias declaration foo as visible but we haven't yet visited that declaration so do nothing,
+                // we would write alias foo declaration when we visit it since it would now be marked as visible
+                if (moduleElementEmitInfo) {
+                    if (moduleElementEmitInfo.node.kind === 238 /* ImportDeclaration */) {
+                        // we have to create asynchronous output only after we have collected complete information
+                        // because it is possible to enable multiple bindings as asynchronously visible
+                        moduleElementEmitInfo.isVisible = true;
+                    }
+                    else {
+                        createAndSetNewTextWriterWithSymbolWriter();
+                        for (var declarationIndent = moduleElementEmitInfo.indent; declarationIndent; declarationIndent--) {
+                            increaseIndent();
+                        }
+                        if (nodeToCheck.kind === 233 /* ModuleDeclaration */) {
+                            ts.Debug.assert(asynchronousSubModuleDeclarationEmitInfo === undefined);
+                            asynchronousSubModuleDeclarationEmitInfo = [];
+                        }
+                        writeModuleElement(nodeToCheck);
+                        if (nodeToCheck.kind === 233 /* ModuleDeclaration */) {
+                            moduleElementEmitInfo.subModuleElementDeclarationEmitInfo = asynchronousSubModuleDeclarationEmitInfo;
+                            asynchronousSubModuleDeclarationEmitInfo = undefined;
                         }
+                        moduleElementEmitInfo.asynchronousOutput = writer.getText();
                     }
                 }
-                return typeReferenceDirectives;
+            });
+            setWriter(oldWriter);
+        }
+        function recordTypeReferenceDirectivesIfNecessary(typeReferenceDirectives) {
+            if (!typeReferenceDirectives) {
+                return;
             }
-            function isSymbolFromTypeDeclarationFile(symbol) {
-                // bail out if symbol does not have associated declarations (i.e. this is transient symbol created for property in binding pattern)
-                if (!symbol.declarations) {
-                    return false;
+            if (!usedTypeDirectiveReferences) {
+                usedTypeDirectiveReferences = ts.createMap();
+            }
+            for (var _i = 0, typeReferenceDirectives_1 = typeReferenceDirectives; _i < typeReferenceDirectives_1.length; _i++) {
+                var directive = typeReferenceDirectives_1[_i];
+                if (!usedTypeDirectiveReferences.has(directive)) {
+                    usedTypeDirectiveReferences.set(directive, directive);
                 }
-                // walk the parent chain for symbols to make sure that top level parent symbol is in the global scope
-                // external modules cannot define or contribute to type declaration files
-                var current = symbol;
-                while (true) {
-                    var parent_15 = getParentOfSymbol(current);
-                    if (parent_15) {
-                        current = parent_15;
+            }
+        }
+        function handleSymbolAccessibilityError(symbolAccessibilityResult) {
+            if (symbolAccessibilityResult.accessibility === 0 /* Accessible */) {
+                // write the aliases
+                if (symbolAccessibilityResult && symbolAccessibilityResult.aliasesToMakeVisible) {
+                    writeAsynchronousModuleElements(symbolAccessibilityResult.aliasesToMakeVisible);
+                }
+            }
+            else {
+                // Report error
+                reportedDeclarationError = true;
+                var errorInfo = writer.getSymbolAccessibilityDiagnostic(symbolAccessibilityResult);
+                if (errorInfo) {
+                    if (errorInfo.typeName) {
+                        emitterDiagnostics.add(ts.createDiagnosticForNode(symbolAccessibilityResult.errorNode || errorInfo.errorNode, errorInfo.diagnosticMessage, ts.getTextOfNodeFromSourceText(currentText, errorInfo.typeName), symbolAccessibilityResult.errorSymbolName, symbolAccessibilityResult.errorModuleName));
                     }
                     else {
-                        break;
-                    }
-                }
-                if (current.valueDeclaration && current.valueDeclaration.kind === 256 /* SourceFile */ && current.flags & 512 /* ValueModule */) {
-                    return false;
-                }
-                // check that at least one declaration of top level symbol originates from type declaration file
-                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                    var decl = _a[_i];
-                    var file = ts.getSourceFileOfNode(decl);
-                    if (fileToDirective.contains(file.path)) {
-                        return true;
+                        emitterDiagnostics.add(ts.createDiagnosticForNode(symbolAccessibilityResult.errorNode || errorInfo.errorNode, errorInfo.diagnosticMessage, symbolAccessibilityResult.errorSymbolName, symbolAccessibilityResult.errorModuleName));
                     }
                 }
-                return false;
             }
         }
-        function getExternalModuleFileFromDeclaration(declaration) {
-            var specifier = ts.getExternalModuleName(declaration);
-            var moduleSymbol = resolveExternalModuleNameWorker(specifier, specifier, /*moduleNotFoundError*/ undefined);
-            if (!moduleSymbol) {
-                return undefined;
+        function trackSymbol(symbol, enclosingDeclaration, meaning) {
+            handleSymbolAccessibilityError(resolver.isSymbolAccessible(symbol, enclosingDeclaration, meaning, /*shouldComputeAliasesToMakeVisible*/ true));
+            recordTypeReferenceDirectivesIfNecessary(resolver.getTypeReferenceDirectivesForSymbol(symbol, meaning));
+        }
+        function reportPrivateInBaseOfClassExpression(propertyName) {
+            if (errorNameNode) {
+                reportedDeclarationError = true;
+                emitterDiagnostics.add(ts.createDiagnosticForNode(errorNameNode, ts.Diagnostics.Property_0_of_exported_class_expression_may_not_be_private_or_protected, propertyName));
             }
-            return ts.getDeclarationOfKind(moduleSymbol, 256 /* SourceFile */);
         }
-        function initializeTypeChecker() {
-            // Bind all source files and propagate errors
-            for (var _i = 0, _a = host.getSourceFiles(); _i < _a.length; _i++) {
-                var file = _a[_i];
-                ts.bindSourceFile(file, compilerOptions);
+        function reportInaccessibleThisError() {
+            if (errorNameNode) {
+                reportedDeclarationError = true;
+                emitterDiagnostics.add(ts.createDiagnosticForNode(errorNameNode, ts.Diagnostics.The_inferred_type_of_0_references_an_inaccessible_this_type_A_type_annotation_is_necessary, ts.declarationNameToString(errorNameNode)));
             }
-            // Initialize global symbol table
-            var augmentations;
-            var requestedExternalEmitHelpers = 0;
-            var firstFileRequestingExternalHelpers;
-            for (var _b = 0, _c = host.getSourceFiles(); _b < _c.length; _b++) {
-                var file = _c[_b];
-                if (!ts.isExternalOrCommonJsModule(file)) {
-                    mergeSymbolTable(globals, file.locals);
-                }
-                if (file.patternAmbientModules && file.patternAmbientModules.length) {
-                    patternAmbientModules = ts.concatenate(patternAmbientModules, file.patternAmbientModules);
-                }
-                if (file.moduleAugmentations.length) {
-                    (augmentations || (augmentations = [])).push(file.moduleAugmentations);
-                }
-                if (file.symbol && file.symbol.globalExports) {
-                    // Merge in UMD exports with first-in-wins semantics (see #9771)
-                    var source = file.symbol.globalExports;
-                    for (var id in source) {
-                        if (!(id in globals)) {
-                            globals[id] = source[id];
-                        }
-                    }
-                }
-                if ((compilerOptions.isolatedModules || ts.isExternalModule(file)) && !file.isDeclarationFile) {
-                    var fileRequestedExternalEmitHelpers = file.flags & 31744 /* EmitHelperFlags */;
-                    if (fileRequestedExternalEmitHelpers) {
-                        requestedExternalEmitHelpers |= fileRequestedExternalEmitHelpers;
-                        if (firstFileRequestingExternalHelpers === undefined) {
-                            firstFileRequestingExternalHelpers = file;
-                        }
-                    }
-                }
+        }
+        function writeTypeOfDeclaration(declaration, type, getSymbolAccessibilityDiagnostic) {
+            writer.getSymbolAccessibilityDiagnostic = getSymbolAccessibilityDiagnostic;
+            write(": ");
+            // use the checker's type, not the declared type,
+            // for optional parameter properties
+            // and also for non-optional initialized parameters that aren't a parameter property
+            // these types may need to add `undefined`.
+            var shouldUseResolverType = declaration.kind === 146 /* Parameter */ &&
+                (resolver.isRequiredInitializedParameter(declaration) ||
+                    resolver.isOptionalUninitializedParameterProperty(declaration));
+            if (type && !shouldUseResolverType) {
+                // Write the type
+                emitType(type);
             }
-            if (augmentations) {
-                // merge module augmentations.
-                // this needs to be done after global symbol table is initialized to make sure that all ambient modules are indexed
-                for (var _d = 0, augmentations_1 = augmentations; _d < augmentations_1.length; _d++) {
-                    var list = augmentations_1[_d];
-                    for (var _e = 0, list_1 = list; _e < list_1.length; _e++) {
-                        var augmentation = list_1[_e];
-                        mergeModuleAugmentation(augmentation);
-                    }
-                }
+            else {
+                errorNameNode = declaration.name;
+                var format = 4 /* UseTypeOfFunction */ |
+                    16384 /* WriteClassExpressionAsTypeLiteral */ |
+                    2048 /* UseTypeAliasValue */ |
+                    (shouldUseResolverType ? 8192 /* AddUndefined */ : 0);
+                resolver.writeTypeOfDeclaration(declaration, enclosingDeclaration, format, writer);
+                errorNameNode = undefined;
             }
-            // Setup global builtins
-            addToSymbolTable(globals, builtinGlobals, ts.Diagnostics.Declaration_name_conflicts_with_built_in_global_identifier_0);
-            getSymbolLinks(undefinedSymbol).type = undefinedWideningType;
-            getSymbolLinks(argumentsSymbol).type = getGlobalType("IArguments");
-            getSymbolLinks(unknownSymbol).type = unknownType;
-            // Initialize special types
-            globalArrayType = getGlobalType("Array", /*arity*/ 1);
-            globalObjectType = getGlobalType("Object");
-            globalFunctionType = getGlobalType("Function");
-            globalStringType = getGlobalType("String");
-            globalNumberType = getGlobalType("Number");
-            globalBooleanType = getGlobalType("Boolean");
-            globalRegExpType = getGlobalType("RegExp");
-            jsxElementType = getExportedTypeFromNamespace("JSX", JsxNames.Element);
-            getGlobalClassDecoratorType = ts.memoize(function () { return getGlobalType("ClassDecorator"); });
-            getGlobalPropertyDecoratorType = ts.memoize(function () { return getGlobalType("PropertyDecorator"); });
-            getGlobalMethodDecoratorType = ts.memoize(function () { return getGlobalType("MethodDecorator"); });
-            getGlobalParameterDecoratorType = ts.memoize(function () { return getGlobalType("ParameterDecorator"); });
-            getGlobalTypedPropertyDescriptorType = ts.memoize(function () { return getGlobalType("TypedPropertyDescriptor", /*arity*/ 1); });
-            getGlobalESSymbolConstructorSymbol = ts.memoize(function () { return getGlobalValueSymbol("Symbol"); });
-            getGlobalPromiseType = ts.memoize(function () { return getGlobalType("Promise", /*arity*/ 1); });
-            tryGetGlobalPromiseType = ts.memoize(function () { return getGlobalSymbol("Promise", 793064 /* Type */, /*diagnostic*/ undefined) && getGlobalPromiseType(); });
-            getGlobalPromiseLikeType = ts.memoize(function () { return getGlobalType("PromiseLike", /*arity*/ 1); });
-            getInstantiatedGlobalPromiseLikeType = ts.memoize(createInstantiatedPromiseLikeType);
-            getGlobalPromiseConstructorSymbol = ts.memoize(function () { return getGlobalValueSymbol("Promise"); });
-            tryGetGlobalPromiseConstructorSymbol = ts.memoize(function () { return getGlobalSymbol("Promise", 107455 /* Value */, /*diagnostic*/ undefined) && getGlobalPromiseConstructorSymbol(); });
-            getGlobalPromiseConstructorLikeType = ts.memoize(function () { return getGlobalType("PromiseConstructorLike"); });
-            getGlobalThenableType = ts.memoize(createThenableType);
-            getGlobalTemplateStringsArrayType = ts.memoize(function () { return getGlobalType("TemplateStringsArray"); });
-            if (languageVersion >= 2 /* ES6 */) {
-                getGlobalESSymbolType = ts.memoize(function () { return getGlobalType("Symbol"); });
-                getGlobalIterableType = ts.memoize(function () { return getGlobalType("Iterable", /*arity*/ 1); });
-                getGlobalIteratorType = ts.memoize(function () { return getGlobalType("Iterator", /*arity*/ 1); });
-                getGlobalIterableIteratorType = ts.memoize(function () { return getGlobalType("IterableIterator", /*arity*/ 1); });
+        }
+        function writeReturnTypeAtSignature(signature, getSymbolAccessibilityDiagnostic) {
+            writer.getSymbolAccessibilityDiagnostic = getSymbolAccessibilityDiagnostic;
+            write(": ");
+            if (signature.type) {
+                // Write the type
+                emitType(signature.type);
             }
             else {
-                getGlobalESSymbolType = ts.memoize(function () { return emptyObjectType; });
-                getGlobalIterableType = ts.memoize(function () { return emptyGenericType; });
-                getGlobalIteratorType = ts.memoize(function () { return emptyGenericType; });
-                getGlobalIterableIteratorType = ts.memoize(function () { return emptyGenericType; });
+                errorNameNode = signature.name;
+                resolver.writeReturnTypeOfSignatureDeclaration(signature, enclosingDeclaration, 4 /* UseTypeOfFunction */ | 2048 /* UseTypeAliasValue */ | 16384 /* WriteClassExpressionAsTypeLiteral */, writer);
+                errorNameNode = undefined;
             }
-            anyArrayType = createArrayType(anyType);
-            var symbol = getGlobalSymbol("ReadonlyArray", 793064 /* Type */, /*diagnostic*/ undefined);
-            globalReadonlyArrayType = symbol && getTypeOfGlobalSymbol(symbol, /*arity*/ 1);
-            anyReadonlyArrayType = globalReadonlyArrayType ? createTypeFromGenericGlobalType(globalReadonlyArrayType, [anyType]) : anyArrayType;
-            // If we have specified that we are importing helpers, we should report global
-            // errors if we cannot resolve the helpers external module, or if it does not have
-            // the necessary helpers exported.
-            if (compilerOptions.importHelpers && firstFileRequestingExternalHelpers) {
-                // Find the first reference to the helpers module.
-                var helpersModule = resolveExternalModule(firstFileRequestingExternalHelpers, ts.externalHelpersModuleNameText, ts.Diagnostics.Cannot_find_module_0, 
-                /*errorNode*/ undefined);
-                // If we found the module, report errors if it does not have the necessary exports.
-                if (helpersModule) {
-                    var exports = helpersModule.exports;
-                    if (requestedExternalEmitHelpers & 1024 /* HasClassExtends */ && languageVersion < 2 /* ES6 */) {
-                        verifyHelperSymbol(exports, "__extends", 107455 /* Value */);
-                    }
-                    if (requestedExternalEmitHelpers & 16384 /* HasJsxSpreadAttributes */ && compilerOptions.jsx !== 1 /* Preserve */) {
-                        verifyHelperSymbol(exports, "__assign", 107455 /* Value */);
-                    }
-                    if (requestedExternalEmitHelpers & 2048 /* HasDecorators */) {
-                        verifyHelperSymbol(exports, "__decorate", 107455 /* Value */);
-                        if (compilerOptions.emitDecoratorMetadata) {
-                            verifyHelperSymbol(exports, "__metadata", 107455 /* Value */);
-                        }
-                    }
-                    if (requestedExternalEmitHelpers & 4096 /* HasParamDecorators */) {
-                        verifyHelperSymbol(exports, "__param", 107455 /* Value */);
-                    }
-                    if (requestedExternalEmitHelpers & 8192 /* HasAsyncFunctions */) {
-                        verifyHelperSymbol(exports, "__awaiter", 107455 /* Value */);
-                        if (languageVersion < 2 /* ES6 */) {
-                            verifyHelperSymbol(exports, "__generator", 107455 /* Value */);
-                        }
+        }
+        function emitLines(nodes) {
+            for (var _i = 0, nodes_3 = nodes; _i < nodes_3.length; _i++) {
+                var node = nodes_3[_i];
+                emit(node);
+            }
+        }
+        function emitSeparatedList(nodes, separator, eachNodeEmitFn, canEmitFn) {
+            var currentWriterPos = writer.getTextPos();
+            for (var _i = 0, nodes_4 = nodes; _i < nodes_4.length; _i++) {
+                var node = nodes_4[_i];
+                if (!canEmitFn || canEmitFn(node)) {
+                    if (currentWriterPos !== writer.getTextPos()) {
+                        write(separator);
                     }
+                    currentWriterPos = writer.getTextPos();
+                    eachNodeEmitFn(node);
                 }
             }
         }
-        function verifyHelperSymbol(symbols, name, meaning) {
-            var symbol = getSymbol(symbols, ts.escapeIdentifier(name), meaning);
-            if (!symbol) {
-                error(/*location*/ undefined, ts.Diagnostics.Module_0_has_no_exported_member_1, ts.externalHelpersModuleNameText, name);
-            }
+        function emitCommaList(nodes, eachNodeEmitFn, canEmitFn) {
+            emitSeparatedList(nodes, ", ", eachNodeEmitFn, canEmitFn);
         }
-        function createInstantiatedPromiseLikeType() {
-            var promiseLikeType = getGlobalPromiseLikeType();
-            if (promiseLikeType !== emptyGenericType) {
-                return createTypeReference(promiseLikeType, [anyType]);
+        function writeJsDocComments(declaration) {
+            if (declaration) {
+                var jsDocComments = ts.getJSDocCommentRanges(declaration, currentText);
+                ts.emitNewLineBeforeLeadingComments(currentLineMap, writer, declaration, jsDocComments);
+                // jsDoc comments are emitted at /*leading comment1 */space/*leading comment*/space
+                ts.emitComments(currentText, currentLineMap, writer, jsDocComments, /*leadingSeparator*/ false, /*trailingSeparator*/ true, newLine, ts.writeCommentRange);
             }
-            return emptyObjectType;
         }
-        function createThenableType() {
-            // build the thenable type that is used to verify against a non-promise "thenable" operand to `await`.
-            var thenPropertySymbol = createSymbol(67108864 /* Transient */ | 4 /* Property */, "then");
-            getSymbolLinks(thenPropertySymbol).type = globalFunctionType;
-            var thenableType = createObjectType(2097152 /* Anonymous */);
-            thenableType.properties = [thenPropertySymbol];
-            thenableType.members = createSymbolTable(thenableType.properties);
-            thenableType.callSignatures = [];
-            thenableType.constructSignatures = [];
-            return thenableType;
+        function emitTypeWithNewGetSymbolAccessibilityDiagnostic(type, getSymbolAccessibilityDiagnostic) {
+            writer.getSymbolAccessibilityDiagnostic = getSymbolAccessibilityDiagnostic;
+            emitType(type);
         }
-        // GRAMMAR CHECKING
-        function checkGrammarDecorators(node) {
-            if (!node.decorators) {
-                return false;
+        function emitType(type) {
+            switch (type.kind) {
+                case 119 /* AnyKeyword */:
+                case 136 /* StringKeyword */:
+                case 133 /* NumberKeyword */:
+                case 122 /* BooleanKeyword */:
+                case 134 /* ObjectKeyword */:
+                case 137 /* SymbolKeyword */:
+                case 105 /* VoidKeyword */:
+                case 139 /* UndefinedKeyword */:
+                case 95 /* NullKeyword */:
+                case 130 /* NeverKeyword */:
+                case 169 /* ThisType */:
+                case 173 /* LiteralType */:
+                    return writeTextOfNode(currentText, type);
+                case 201 /* ExpressionWithTypeArguments */:
+                    return emitExpressionWithTypeArguments(type);
+                case 159 /* TypeReference */:
+                    return emitTypeReference(type);
+                case 162 /* TypeQuery */:
+                    return emitTypeQuery(type);
+                case 164 /* ArrayType */:
+                    return emitArrayType(type);
+                case 165 /* TupleType */:
+                    return emitTupleType(type);
+                case 166 /* UnionType */:
+                    return emitUnionType(type);
+                case 167 /* IntersectionType */:
+                    return emitIntersectionType(type);
+                case 168 /* ParenthesizedType */:
+                    return emitParenType(type);
+                case 170 /* TypeOperator */:
+                    return emitTypeOperator(type);
+                case 171 /* IndexedAccessType */:
+                    return emitIndexedAccessType(type);
+                case 172 /* MappedType */:
+                    return emitMappedType(type);
+                case 160 /* FunctionType */:
+                case 161 /* ConstructorType */:
+                    return emitSignatureDeclarationWithJsDocComments(type);
+                case 163 /* TypeLiteral */:
+                    return emitTypeLiteral(type);
+                case 71 /* Identifier */:
+                    return emitEntityName(type);
+                case 143 /* QualifiedName */:
+                    return emitEntityName(type);
+                case 158 /* TypePredicate */:
+                    return emitTypePredicate(type);
             }
-            if (!ts.nodeCanBeDecorated(node)) {
-                if (node.kind === 147 /* MethodDeclaration */ && !ts.nodeIsPresent(node.body)) {
-                    return grammarErrorOnFirstToken(node, ts.Diagnostics.A_decorator_can_only_decorate_a_method_implementation_not_an_overload);
+            function writeEntityName(entityName) {
+                if (entityName.kind === 71 /* Identifier */) {
+                    writeTextOfNode(currentText, entityName);
                 }
                 else {
-                    return grammarErrorOnFirstToken(node, ts.Diagnostics.Decorators_are_not_valid_here);
-                }
-            }
-            else if (node.kind === 149 /* GetAccessor */ || node.kind === 150 /* SetAccessor */) {
-                var accessors = ts.getAllAccessorDeclarations(node.parent.members, node);
-                if (accessors.firstAccessor.decorators && node === accessors.secondAccessor) {
-                    return grammarErrorOnFirstToken(node, ts.Diagnostics.Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name);
+                    var left = entityName.kind === 143 /* QualifiedName */ ? entityName.left : entityName.expression;
+                    var right = entityName.kind === 143 /* QualifiedName */ ? entityName.right : entityName.name;
+                    writeEntityName(left);
+                    write(".");
+                    writeTextOfNode(currentText, right);
                 }
             }
-            return false;
-        }
-        function checkGrammarModifiers(node) {
-            var quickResult = reportObviousModifierErrors(node);
-            if (quickResult !== undefined) {
-                return quickResult;
+            function emitEntityName(entityName) {
+                var visibilityResult = resolver.isEntityNameVisible(entityName, 
+                // Aliases can be written asynchronously so use correct enclosing declaration
+                entityName.parent.kind === 237 /* ImportEqualsDeclaration */ ? entityName.parent : enclosingDeclaration);
+                handleSymbolAccessibilityError(visibilityResult);
+                recordTypeReferenceDirectivesIfNecessary(resolver.getTypeReferenceDirectivesForEntityName(entityName));
+                writeEntityName(entityName);
             }
-            var lastStatic, lastPrivate, lastProtected, lastDeclare, lastAsync, lastReadonly;
-            var flags = 0 /* None */;
-            for (var _i = 0, _a = node.modifiers; _i < _a.length; _i++) {
-                var modifier = _a[_i];
-                if (modifier.kind !== 128 /* ReadonlyKeyword */) {
-                    if (node.kind === 144 /* PropertySignature */ || node.kind === 146 /* MethodSignature */) {
-                        return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_type_member, ts.tokenToString(modifier.kind));
-                    }
-                    if (node.kind === 153 /* IndexSignature */) {
-                        return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_an_index_signature, ts.tokenToString(modifier.kind));
+            function emitExpressionWithTypeArguments(node) {
+                if (ts.isEntityNameExpression(node.expression)) {
+                    ts.Debug.assert(node.expression.kind === 71 /* Identifier */ || node.expression.kind === 179 /* PropertyAccessExpression */);
+                    emitEntityName(node.expression);
+                    if (node.typeArguments) {
+                        write("<");
+                        emitCommaList(node.typeArguments, emitType);
+                        write(">");
                     }
                 }
-                switch (modifier.kind) {
-                    case 74 /* ConstKeyword */:
-                        if (node.kind !== 224 /* EnumDeclaration */ && node.parent.kind === 221 /* ClassDeclaration */) {
-                            return grammarErrorOnNode(node, ts.Diagnostics.A_class_member_cannot_have_the_0_keyword, ts.tokenToString(74 /* ConstKeyword */));
-                        }
-                        break;
-                    case 112 /* PublicKeyword */:
-                    case 111 /* ProtectedKeyword */:
-                    case 110 /* PrivateKeyword */:
-                        var text = visibilityToString(ts.modifierToFlag(modifier.kind));
-                        if (modifier.kind === 111 /* ProtectedKeyword */) {
-                            lastProtected = modifier;
-                        }
-                        else if (modifier.kind === 110 /* PrivateKeyword */) {
-                            lastPrivate = modifier;
-                        }
-                        if (flags & 28 /* AccessibilityModifier */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics.Accessibility_modifier_already_seen);
-                        }
-                        else if (flags & 32 /* Static */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "static");
-                        }
-                        else if (flags & 64 /* Readonly */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "readonly");
-                        }
-                        else if (flags & 256 /* Async */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "async");
-                        }
-                        else if (node.parent.kind === 226 /* ModuleBlock */ || node.parent.kind === 256 /* SourceFile */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_module_or_namespace_element, text);
-                        }
-                        else if (flags & 128 /* Abstract */) {
-                            if (modifier.kind === 110 /* PrivateKeyword */) {
-                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, text, "abstract");
-                            }
-                            else {
-                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "abstract");
-                            }
-                        }
-                        flags |= ts.modifierToFlag(modifier.kind);
-                        break;
-                    case 113 /* StaticKeyword */:
-                        if (flags & 32 /* Static */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "static");
-                        }
-                        else if (flags & 64 /* Readonly */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "static", "readonly");
-                        }
-                        else if (flags & 256 /* Async */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "static", "async");
-                        }
-                        else if (node.parent.kind === 226 /* ModuleBlock */ || node.parent.kind === 256 /* SourceFile */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_module_or_namespace_element, "static");
-                        }
-                        else if (node.kind === 142 /* Parameter */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "static");
-                        }
-                        else if (flags & 128 /* Abstract */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, "static", "abstract");
-                        }
-                        flags |= 32 /* Static */;
-                        lastStatic = modifier;
-                        break;
-                    case 128 /* ReadonlyKeyword */:
-                        if (flags & 64 /* Readonly */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "readonly");
-                        }
-                        else if (node.kind !== 145 /* PropertyDeclaration */ && node.kind !== 144 /* PropertySignature */ && node.kind !== 153 /* IndexSignature */ && node.kind !== 142 /* Parameter */) {
-                            // If node.kind === SyntaxKind.Parameter, checkParameter report an error if it's not a parameter property.
-                            return grammarErrorOnNode(modifier, ts.Diagnostics.readonly_modifier_can_only_appear_on_a_property_declaration_or_index_signature);
-                        }
-                        flags |= 64 /* Readonly */;
-                        lastReadonly = modifier;
-                        break;
-                    case 82 /* ExportKeyword */:
-                        if (flags & 1 /* Export */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "export");
-                        }
-                        else if (flags & 2 /* Ambient */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "export", "declare");
-                        }
-                        else if (flags & 128 /* Abstract */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "export", "abstract");
-                        }
-                        else if (flags & 256 /* Async */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "export", "async");
-                        }
-                        else if (node.parent.kind === 221 /* ClassDeclaration */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_class_element, "export");
-                        }
-                        else if (node.kind === 142 /* Parameter */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "export");
-                        }
-                        flags |= 1 /* Export */;
-                        break;
-                    case 122 /* DeclareKeyword */:
-                        if (flags & 2 /* Ambient */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "declare");
-                        }
-                        else if (flags & 256 /* Async */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_in_an_ambient_context, "async");
-                        }
-                        else if (node.parent.kind === 221 /* ClassDeclaration */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_class_element, "declare");
-                        }
-                        else if (node.kind === 142 /* Parameter */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "declare");
-                        }
-                        else if (ts.isInAmbientContext(node.parent) && node.parent.kind === 226 /* ModuleBlock */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics.A_declare_modifier_cannot_be_used_in_an_already_ambient_context);
-                        }
-                        flags |= 2 /* Ambient */;
-                        lastDeclare = modifier;
-                        break;
-                    case 115 /* AbstractKeyword */:
-                        if (flags & 128 /* Abstract */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "abstract");
-                        }
-                        if (node.kind !== 221 /* ClassDeclaration */) {
-                            if (node.kind !== 147 /* MethodDeclaration */ &&
-                                node.kind !== 145 /* PropertyDeclaration */ &&
-                                node.kind !== 149 /* GetAccessor */ &&
-                                node.kind !== 150 /* SetAccessor */) {
-                                return grammarErrorOnNode(modifier, ts.Diagnostics.abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration);
-                            }
-                            if (!(node.parent.kind === 221 /* ClassDeclaration */ && ts.getModifierFlags(node.parent) & 128 /* Abstract */)) {
-                                return grammarErrorOnNode(modifier, ts.Diagnostics.Abstract_methods_can_only_appear_within_an_abstract_class);
-                            }
-                            if (flags & 32 /* Static */) {
-                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, "static", "abstract");
-                            }
-                            if (flags & 8 /* Private */) {
-                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, "private", "abstract");
-                            }
-                        }
-                        flags |= 128 /* Abstract */;
-                        break;
-                    case 118 /* AsyncKeyword */:
-                        if (flags & 256 /* Async */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "async");
-                        }
-                        else if (flags & 2 /* Ambient */ || ts.isInAmbientContext(node.parent)) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_in_an_ambient_context, "async");
-                        }
-                        else if (node.kind === 142 /* Parameter */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "async");
-                        }
-                        flags |= 256 /* Async */;
-                        lastAsync = modifier;
-                        break;
+            }
+            function emitTypeReference(type) {
+                emitEntityName(type.typeName);
+                if (type.typeArguments) {
+                    write("<");
+                    emitCommaList(type.typeArguments, emitType);
+                    write(">");
                 }
             }
-            if (node.kind === 148 /* Constructor */) {
-                if (flags & 32 /* Static */) {
-                    return grammarErrorOnNode(lastStatic, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "static");
+            function emitTypePredicate(type) {
+                writeTextOfNode(currentText, type.parameterName);
+                write(" is ");
+                emitType(type.type);
+            }
+            function emitTypeQuery(type) {
+                write("typeof ");
+                emitEntityName(type.exprName);
+            }
+            function emitArrayType(type) {
+                emitType(type.elementType);
+                write("[]");
+            }
+            function emitTupleType(type) {
+                write("[");
+                emitCommaList(type.elementTypes, emitType);
+                write("]");
+            }
+            function emitUnionType(type) {
+                emitSeparatedList(type.types, " | ", emitType);
+            }
+            function emitIntersectionType(type) {
+                emitSeparatedList(type.types, " & ", emitType);
+            }
+            function emitParenType(type) {
+                write("(");
+                emitType(type.type);
+                write(")");
+            }
+            function emitTypeOperator(type) {
+                write(ts.tokenToString(type.operator));
+                write(" ");
+                emitType(type.type);
+            }
+            function emitIndexedAccessType(node) {
+                emitType(node.objectType);
+                write("[");
+                emitType(node.indexType);
+                write("]");
+            }
+            function emitMappedType(node) {
+                var prevEnclosingDeclaration = enclosingDeclaration;
+                enclosingDeclaration = node;
+                write("{");
+                writeLine();
+                increaseIndent();
+                if (node.readonlyToken) {
+                    write("readonly ");
                 }
-                if (flags & 128 /* Abstract */) {
-                    return grammarErrorOnNode(lastStatic, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "abstract");
+                write("[");
+                writeEntityName(node.typeParameter.name);
+                write(" in ");
+                emitType(node.typeParameter.constraint);
+                write("]");
+                if (node.questionToken) {
+                    write("?");
                 }
-                else if (flags & 256 /* Async */) {
-                    return grammarErrorOnNode(lastAsync, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "async");
+                write(": ");
+                emitType(node.type);
+                write(";");
+                writeLine();
+                decreaseIndent();
+                write("}");
+                enclosingDeclaration = prevEnclosingDeclaration;
+            }
+            function emitTypeLiteral(type) {
+                write("{");
+                if (type.members.length) {
+                    writeLine();
+                    increaseIndent();
+                    // write members
+                    emitLines(type.members);
+                    decreaseIndent();
                 }
-                else if (flags & 64 /* Readonly */) {
-                    return grammarErrorOnNode(lastReadonly, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "readonly");
+                write("}");
+            }
+        }
+        function emitSourceFile(node) {
+            currentText = node.text;
+            currentLineMap = ts.getLineStarts(node);
+            currentIdentifiers = node.identifiers;
+            isCurrentFileExternalModule = ts.isExternalModule(node);
+            enclosingDeclaration = node;
+            ts.emitDetachedComments(currentText, currentLineMap, writer, ts.writeCommentRange, node, newLine, /*removeComments*/ true);
+            emitLines(node.statements);
+        }
+        // Return a temp variable name to be used in `export default`/`export class ... extends` statements.
+        // The temp name will be of the form _default_counter.
+        // Note that export default is only allowed at most once in a module, so we
+        // do not need to keep track of created temp names.
+        function getExportTempVariableName(baseName) {
+            if (!currentIdentifiers.has(baseName)) {
+                return baseName;
+            }
+            var count = 0;
+            while (true) {
+                count++;
+                var name_39 = baseName + "_" + count;
+                if (!currentIdentifiers.has(name_39)) {
+                    return name_39;
                 }
-                return;
             }
-            else if ((node.kind === 230 /* ImportDeclaration */ || node.kind === 229 /* ImportEqualsDeclaration */) && flags & 2 /* Ambient */) {
-                return grammarErrorOnNode(lastDeclare, ts.Diagnostics.A_0_modifier_cannot_be_used_with_an_import_declaration, "declare");
+        }
+        function emitTempVariableDeclaration(expr, baseName, diagnostic, needsDeclare) {
+            var tempVarName = getExportTempVariableName(baseName);
+            if (needsDeclare) {
+                write("declare ");
             }
-            else if (node.kind === 142 /* Parameter */ && (flags & 92 /* ParameterPropertyModifier */) && ts.isBindingPattern(node.name)) {
-                return grammarErrorOnNode(node, ts.Diagnostics.A_parameter_property_may_not_be_declared_using_a_binding_pattern);
+            write("const ");
+            write(tempVarName);
+            write(": ");
+            writer.getSymbolAccessibilityDiagnostic = function () { return diagnostic; };
+            resolver.writeTypeOfExpression(expr, enclosingDeclaration, 4 /* UseTypeOfFunction */ | 2048 /* UseTypeAliasValue */ | 16384 /* WriteClassExpressionAsTypeLiteral */, writer);
+            write(";");
+            writeLine();
+            return tempVarName;
+        }
+        function emitExportAssignment(node) {
+            if (node.expression.kind === 71 /* Identifier */) {
+                write(node.isExportEquals ? "export = " : "export default ");
+                writeTextOfNode(currentText, node.expression);
             }
-            else if (node.kind === 142 /* Parameter */ && (flags & 92 /* ParameterPropertyModifier */) && node.dotDotDotToken) {
-                return grammarErrorOnNode(node, ts.Diagnostics.A_parameter_property_cannot_be_declared_using_a_rest_parameter);
+            else {
+                var tempVarName = emitTempVariableDeclaration(node.expression, "_default", {
+                    diagnosticMessage: ts.Diagnostics.Default_export_of_the_module_has_or_is_using_private_name_0,
+                    errorNode: node
+                }, needsDeclare);
+                write(node.isExportEquals ? "export = " : "export default ");
+                write(tempVarName);
             }
-            if (flags & 256 /* Async */) {
-                return checkGrammarAsyncModifier(node, lastAsync);
+            write(";");
+            writeLine();
+            // Make all the declarations visible for the export name
+            if (node.expression.kind === 71 /* Identifier */) {
+                var nodes = resolver.collectLinkedAliases(node.expression);
+                // write each of these declarations asynchronously
+                writeAsynchronousModuleElements(nodes);
             }
         }
-        /**
-         * true | false: Early return this value from checkGrammarModifiers.
-         * undefined: Need to do full checking on the modifiers.
-         */
-        function reportObviousModifierErrors(node) {
-            return !node.modifiers
-                ? false
-                : shouldReportBadModifier(node)
-                    ? grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here)
-                    : undefined;
+        function isModuleElementVisible(node) {
+            return resolver.isDeclarationVisible(node);
         }
-        function shouldReportBadModifier(node) {
-            switch (node.kind) {
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                case 148 /* Constructor */:
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                case 153 /* IndexSignature */:
-                case 225 /* ModuleDeclaration */:
-                case 230 /* ImportDeclaration */:
-                case 229 /* ImportEqualsDeclaration */:
-                case 236 /* ExportDeclaration */:
-                case 235 /* ExportAssignment */:
-                case 179 /* FunctionExpression */:
-                case 180 /* ArrowFunction */:
-                case 142 /* Parameter */:
-                    return false;
-                default:
-                    if (node.parent.kind === 226 /* ModuleBlock */ || node.parent.kind === 256 /* SourceFile */) {
-                        return false;
-                    }
-                    switch (node.kind) {
-                        case 220 /* FunctionDeclaration */:
-                            return nodeHasAnyModifiersExcept(node, 118 /* AsyncKeyword */);
-                        case 221 /* ClassDeclaration */:
-                            return nodeHasAnyModifiersExcept(node, 115 /* AbstractKeyword */);
-                        case 222 /* InterfaceDeclaration */:
-                        case 200 /* VariableStatement */:
-                        case 223 /* TypeAliasDeclaration */:
-                            return true;
-                        case 224 /* EnumDeclaration */:
-                            return nodeHasAnyModifiersExcept(node, 74 /* ConstKeyword */);
-                        default:
-                            ts.Debug.fail();
-                            return false;
-                    }
+        function emitModuleElement(node, isModuleElementVisible) {
+            if (isModuleElementVisible) {
+                writeModuleElement(node);
             }
-        }
-        function nodeHasAnyModifiersExcept(node, allowedModifier) {
-            return node.modifiers.length > 1 || node.modifiers[0].kind !== allowedModifier;
-        }
-        function checkGrammarAsyncModifier(node, asyncModifier) {
-            switch (node.kind) {
-                case 147 /* MethodDeclaration */:
-                case 220 /* FunctionDeclaration */:
-                case 179 /* FunctionExpression */:
-                case 180 /* ArrowFunction */:
-                    if (!node.asteriskToken) {
-                        return false;
+            else if (node.kind === 237 /* ImportEqualsDeclaration */ ||
+                (node.parent.kind === 265 /* SourceFile */ && isCurrentFileExternalModule)) {
+                var isVisible = void 0;
+                if (asynchronousSubModuleDeclarationEmitInfo && node.parent.kind !== 265 /* SourceFile */) {
+                    // Import declaration of another module that is visited async so lets put it in right spot
+                    asynchronousSubModuleDeclarationEmitInfo.push({
+                        node: node,
+                        outputPos: writer.getTextPos(),
+                        indent: writer.getIndent(),
+                        isVisible: isVisible
+                    });
+                }
+                else {
+                    if (node.kind === 238 /* ImportDeclaration */) {
+                        var importDeclaration = node;
+                        if (importDeclaration.importClause) {
+                            isVisible = (importDeclaration.importClause.name && resolver.isDeclarationVisible(importDeclaration.importClause)) ||
+                                isVisibleNamedBinding(importDeclaration.importClause.namedBindings);
+                        }
                     }
-                    break;
-            }
-            return grammarErrorOnNode(asyncModifier, ts.Diagnostics._0_modifier_cannot_be_used_here, "async");
-        }
-        function checkGrammarForDisallowedTrailingComma(list) {
-            if (list && list.hasTrailingComma) {
-                var start = list.end - ",".length;
-                var end = list.end;
-                var sourceFile = ts.getSourceFileOfNode(list[0]);
-                return grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.Trailing_comma_not_allowed);
+                    moduleElementDeclarationEmitInfo.push({
+                        node: node,
+                        outputPos: writer.getTextPos(),
+                        indent: writer.getIndent(),
+                        isVisible: isVisible
+                    });
+                }
             }
         }
-        function checkGrammarTypeParameterList(node, typeParameters, file) {
-            if (checkGrammarForDisallowedTrailingComma(typeParameters)) {
-                return true;
-            }
-            if (typeParameters && typeParameters.length === 0) {
-                var start = typeParameters.pos - "<".length;
-                var end = ts.skipTrivia(file.text, typeParameters.end) + ">".length;
-                return grammarErrorAtPos(file, start, end - start, ts.Diagnostics.Type_parameter_list_cannot_be_empty);
+        function writeModuleElement(node) {
+            switch (node.kind) {
+                case 228 /* FunctionDeclaration */:
+                    return writeFunctionDeclaration(node);
+                case 208 /* VariableStatement */:
+                    return writeVariableStatement(node);
+                case 230 /* InterfaceDeclaration */:
+                    return writeInterfaceDeclaration(node);
+                case 229 /* ClassDeclaration */:
+                    return writeClassDeclaration(node);
+                case 231 /* TypeAliasDeclaration */:
+                    return writeTypeAliasDeclaration(node);
+                case 232 /* EnumDeclaration */:
+                    return writeEnumDeclaration(node);
+                case 233 /* ModuleDeclaration */:
+                    return writeModuleDeclaration(node);
+                case 237 /* ImportEqualsDeclaration */:
+                    return writeImportEqualsDeclaration(node);
+                case 238 /* ImportDeclaration */:
+                    return writeImportDeclaration(node);
+                default:
+                    ts.Debug.fail("Unknown symbol kind");
             }
         }
-        function checkGrammarParameterList(parameters) {
-            var seenOptionalParameter = false;
-            var parameterCount = parameters.length;
-            for (var i = 0; i < parameterCount; i++) {
-                var parameter = parameters[i];
-                if (parameter.dotDotDotToken) {
-                    if (i !== (parameterCount - 1)) {
-                        return grammarErrorOnNode(parameter.dotDotDotToken, ts.Diagnostics.A_rest_parameter_must_be_last_in_a_parameter_list);
-                    }
-                    if (ts.isBindingPattern(parameter.name)) {
-                        return grammarErrorOnNode(parameter.name, ts.Diagnostics.A_rest_element_cannot_contain_a_binding_pattern);
-                    }
-                    if (parameter.questionToken) {
-                        return grammarErrorOnNode(parameter.questionToken, ts.Diagnostics.A_rest_parameter_cannot_be_optional);
-                    }
-                    if (parameter.initializer) {
-                        return grammarErrorOnNode(parameter.name, ts.Diagnostics.A_rest_parameter_cannot_have_an_initializer);
-                    }
+        function emitModuleElementDeclarationFlags(node) {
+            // If the node is parented in the current source file we need to emit export declare or just export
+            if (node.parent.kind === 265 /* SourceFile */) {
+                var modifiers = ts.getModifierFlags(node);
+                // If the node is exported
+                if (modifiers & 1 /* Export */) {
+                    write("export ");
                 }
-                else if (parameter.questionToken) {
-                    seenOptionalParameter = true;
-                    if (parameter.initializer) {
-                        return grammarErrorOnNode(parameter.name, ts.Diagnostics.Parameter_cannot_have_question_mark_and_initializer);
-                    }
+                if (modifiers & 512 /* Default */) {
+                    write("default ");
                 }
-                else if (seenOptionalParameter && !parameter.initializer) {
-                    return grammarErrorOnNode(parameter.name, ts.Diagnostics.A_required_parameter_cannot_follow_an_optional_parameter);
+                else if (node.kind !== 230 /* InterfaceDeclaration */ && needsDeclare) {
+                    write("declare ");
                 }
             }
         }
-        function checkGrammarFunctionLikeDeclaration(node) {
-            // Prevent cascading error by short-circuit
-            var file = ts.getSourceFileOfNode(node);
-            return checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarTypeParameterList(node, node.typeParameters, file) ||
-                checkGrammarParameterList(node.parameters) || checkGrammarArrowFunction(node, file);
+        function emitClassMemberDeclarationFlags(flags) {
+            if (flags & 8 /* Private */) {
+                write("private ");
+            }
+            else if (flags & 16 /* Protected */) {
+                write("protected ");
+            }
+            if (flags & 32 /* Static */) {
+                write("static ");
+            }
+            if (flags & 64 /* Readonly */) {
+                write("readonly ");
+            }
+            if (flags & 128 /* Abstract */) {
+                write("abstract ");
+            }
         }
-        function checkGrammarArrowFunction(node, file) {
-            if (node.kind === 180 /* ArrowFunction */) {
-                var arrowFunction = node;
-                var startLine = ts.getLineAndCharacterOfPosition(file, arrowFunction.equalsGreaterThanToken.pos).line;
-                var endLine = ts.getLineAndCharacterOfPosition(file, arrowFunction.equalsGreaterThanToken.end).line;
-                if (startLine !== endLine) {
-                    return grammarErrorOnNode(arrowFunction.equalsGreaterThanToken, ts.Diagnostics.Line_terminator_not_permitted_before_arrow);
-                }
+        function writeImportEqualsDeclaration(node) {
+            // note usage of writer. methods instead of aliases created, just to make sure we are using
+            // correct writer especially to handle asynchronous alias writing
+            emitJsDocComments(node);
+            if (ts.hasModifier(node, 1 /* Export */)) {
+                write("export ");
+            }
+            write("import ");
+            writeTextOfNode(currentText, node.name);
+            write(" = ");
+            if (ts.isInternalModuleImportEqualsDeclaration(node)) {
+                emitTypeWithNewGetSymbolAccessibilityDiagnostic(node.moduleReference, getImportEntityNameVisibilityError);
+                write(";");
+            }
+            else {
+                write("require(");
+                emitExternalModuleSpecifier(node);
+                write(");");
+            }
+            writer.writeLine();
+            function getImportEntityNameVisibilityError() {
+                return {
+                    diagnosticMessage: ts.Diagnostics.Import_declaration_0_is_using_private_name_1,
+                    errorNode: node,
+                    typeName: node.name
+                };
             }
-            return false;
         }
-        function checkGrammarIndexSignatureParameters(node) {
-            var parameter = node.parameters[0];
-            if (node.parameters.length !== 1) {
-                if (parameter) {
-                    return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_must_have_exactly_one_parameter);
+        function isVisibleNamedBinding(namedBindings) {
+            if (namedBindings) {
+                if (namedBindings.kind === 240 /* NamespaceImport */) {
+                    return resolver.isDeclarationVisible(namedBindings);
                 }
                 else {
-                    return grammarErrorOnNode(node, ts.Diagnostics.An_index_signature_must_have_exactly_one_parameter);
+                    return ts.forEach(namedBindings.elements, function (namedImport) { return resolver.isDeclarationVisible(namedImport); });
                 }
             }
-            if (parameter.dotDotDotToken) {
-                return grammarErrorOnNode(parameter.dotDotDotToken, ts.Diagnostics.An_index_signature_cannot_have_a_rest_parameter);
+        }
+        function writeImportDeclaration(node) {
+            emitJsDocComments(node);
+            if (ts.hasModifier(node, 1 /* Export */)) {
+                write("export ");
             }
-            if (ts.getModifierFlags(parameter) !== 0) {
-                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_cannot_have_an_accessibility_modifier);
+            write("import ");
+            if (node.importClause) {
+                var currentWriterPos = writer.getTextPos();
+                if (node.importClause.name && resolver.isDeclarationVisible(node.importClause)) {
+                    writeTextOfNode(currentText, node.importClause.name);
+                }
+                if (node.importClause.namedBindings && isVisibleNamedBinding(node.importClause.namedBindings)) {
+                    if (currentWriterPos !== writer.getTextPos()) {
+                        // If the default binding was emitted, write the separated
+                        write(", ");
+                    }
+                    if (node.importClause.namedBindings.kind === 240 /* NamespaceImport */) {
+                        write("* as ");
+                        writeTextOfNode(currentText, node.importClause.namedBindings.name);
+                    }
+                    else {
+                        write("{ ");
+                        emitCommaList(node.importClause.namedBindings.elements, emitImportOrExportSpecifier, resolver.isDeclarationVisible);
+                        write(" }");
+                    }
+                }
+                write(" from ");
             }
-            if (parameter.questionToken) {
-                return grammarErrorOnNode(parameter.questionToken, ts.Diagnostics.An_index_signature_parameter_cannot_have_a_question_mark);
+            emitExternalModuleSpecifier(node);
+            write(";");
+            writer.writeLine();
+        }
+        function emitExternalModuleSpecifier(parent) {
+            // emitExternalModuleSpecifier is usually called when we emit something in the.d.ts file that will make it an external module (i.e. import/export declarations).
+            // the only case when it is not true is when we call it to emit correct name for module augmentation - d.ts files with just module augmentations are not considered
+            // external modules since they are indistinguishable from script files with ambient modules. To fix this in such d.ts files we'll emit top level 'export {}'
+            // so compiler will treat them as external modules.
+            resultHasExternalModuleIndicator = resultHasExternalModuleIndicator || parent.kind !== 233 /* ModuleDeclaration */;
+            var moduleSpecifier;
+            if (parent.kind === 237 /* ImportEqualsDeclaration */) {
+                var node = parent;
+                moduleSpecifier = ts.getExternalModuleImportEqualsDeclarationExpression(node);
             }
-            if (parameter.initializer) {
-                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_cannot_have_an_initializer);
+            else if (parent.kind === 233 /* ModuleDeclaration */) {
+                moduleSpecifier = parent.name;
             }
-            if (!parameter.type) {
-                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_must_have_a_type_annotation);
+            else {
+                var node = parent;
+                moduleSpecifier = node.moduleSpecifier;
             }
-            if (parameter.type.kind !== 132 /* StringKeyword */ && parameter.type.kind !== 130 /* NumberKeyword */) {
-                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_type_must_be_string_or_number);
+            if (moduleSpecifier.kind === 9 /* StringLiteral */ && isBundledEmit && (compilerOptions.out || compilerOptions.outFile)) {
+                var moduleName = ts.getExternalModuleNameFromDeclaration(host, resolver, parent);
+                if (moduleName) {
+                    write('"');
+                    write(moduleName);
+                    write('"');
+                    return;
+                }
             }
-            if (!node.type) {
-                return grammarErrorOnNode(node, ts.Diagnostics.An_index_signature_must_have_a_type_annotation);
+            writeTextOfNode(currentText, moduleSpecifier);
+        }
+        function emitImportOrExportSpecifier(node) {
+            if (node.propertyName) {
+                writeTextOfNode(currentText, node.propertyName);
+                write(" as ");
             }
+            writeTextOfNode(currentText, node.name);
         }
-        function checkGrammarIndexSignature(node) {
-            // Prevent cascading error by short-circuit
-            return checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarIndexSignatureParameters(node);
+        function emitExportSpecifier(node) {
+            emitImportOrExportSpecifier(node);
+            // Make all the declarations visible for the export name
+            var nodes = resolver.collectLinkedAliases(node.propertyName || node.name);
+            // write each of these declarations asynchronously
+            writeAsynchronousModuleElements(nodes);
         }
-        function checkGrammarForAtLeastOneTypeArgument(node, typeArguments) {
-            if (typeArguments && typeArguments.length === 0) {
-                var sourceFile = ts.getSourceFileOfNode(node);
-                var start = typeArguments.pos - "<".length;
-                var end = ts.skipTrivia(sourceFile.text, typeArguments.end) + ">".length;
-                return grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.Type_argument_list_cannot_be_empty);
+        function emitExportDeclaration(node) {
+            emitJsDocComments(node);
+            write("export ");
+            if (node.exportClause) {
+                write("{ ");
+                emitCommaList(node.exportClause.elements, emitExportSpecifier);
+                write(" }");
             }
+            else {
+                write("*");
+            }
+            if (node.moduleSpecifier) {
+                write(" from ");
+                emitExternalModuleSpecifier(node);
+            }
+            write(";");
+            writer.writeLine();
         }
-        function checkGrammarTypeArguments(node, typeArguments) {
-            return checkGrammarForDisallowedTrailingComma(typeArguments) ||
-                checkGrammarForAtLeastOneTypeArgument(node, typeArguments);
-        }
-        function checkGrammarForOmittedArgument(node, args) {
-            if (args) {
-                var sourceFile = ts.getSourceFileOfNode(node);
-                for (var _i = 0, args_4 = args; _i < args_4.length; _i++) {
-                    var arg = args_4[_i];
-                    if (arg.kind === 193 /* OmittedExpression */) {
-                        return grammarErrorAtPos(sourceFile, arg.pos, 0, ts.Diagnostics.Argument_expression_expected);
-                    }
+        function writeModuleDeclaration(node) {
+            emitJsDocComments(node);
+            emitModuleElementDeclarationFlags(node);
+            if (ts.isGlobalScopeAugmentation(node)) {
+                write("global ");
+            }
+            else {
+                if (node.flags & 16 /* Namespace */) {
+                    write("namespace ");
+                }
+                else {
+                    write("module ");
+                }
+                if (ts.isExternalModuleAugmentation(node)) {
+                    emitExternalModuleSpecifier(node);
+                }
+                else {
+                    writeTextOfNode(currentText, node.name);
                 }
             }
+            while (node.body && node.body.kind !== 234 /* ModuleBlock */) {
+                node = node.body;
+                write(".");
+                writeTextOfNode(currentText, node.name);
+            }
+            var prevEnclosingDeclaration = enclosingDeclaration;
+            if (node.body) {
+                enclosingDeclaration = node;
+                write(" {");
+                writeLine();
+                increaseIndent();
+                emitLines(node.body.statements);
+                decreaseIndent();
+                write("}");
+                writeLine();
+                enclosingDeclaration = prevEnclosingDeclaration;
+            }
+            else {
+                write(";");
+            }
         }
-        function checkGrammarArguments(node, args) {
-            return checkGrammarForOmittedArgument(node, args);
+        function writeTypeAliasDeclaration(node) {
+            var prevEnclosingDeclaration = enclosingDeclaration;
+            enclosingDeclaration = node;
+            emitJsDocComments(node);
+            emitModuleElementDeclarationFlags(node);
+            write("type ");
+            writeTextOfNode(currentText, node.name);
+            emitTypeParameters(node.typeParameters);
+            write(" = ");
+            emitTypeWithNewGetSymbolAccessibilityDiagnostic(node.type, getTypeAliasDeclarationVisibilityError);
+            write(";");
+            writeLine();
+            enclosingDeclaration = prevEnclosingDeclaration;
+            function getTypeAliasDeclarationVisibilityError() {
+                return {
+                    diagnosticMessage: ts.Diagnostics.Exported_type_alias_0_has_or_is_using_private_name_1,
+                    errorNode: node.type,
+                    typeName: node.name
+                };
+            }
         }
-        function checkGrammarHeritageClause(node) {
-            var types = node.types;
-            if (checkGrammarForDisallowedTrailingComma(types)) {
-                return true;
+        function writeEnumDeclaration(node) {
+            emitJsDocComments(node);
+            emitModuleElementDeclarationFlags(node);
+            if (ts.isConst(node)) {
+                write("const ");
             }
-            if (types && types.length === 0) {
-                var listType = ts.tokenToString(node.token);
-                var sourceFile = ts.getSourceFileOfNode(node);
-                return grammarErrorAtPos(sourceFile, types.pos, 0, ts.Diagnostics._0_list_cannot_be_empty, listType);
+            write("enum ");
+            writeTextOfNode(currentText, node.name);
+            write(" {");
+            writeLine();
+            increaseIndent();
+            emitLines(node.members);
+            decreaseIndent();
+            write("}");
+            writeLine();
+        }
+        function emitEnumMemberDeclaration(node) {
+            emitJsDocComments(node);
+            writeTextOfNode(currentText, node.name);
+            var enumMemberValue = resolver.getConstantValue(node);
+            if (enumMemberValue !== undefined) {
+                write(" = ");
+                write(ts.getTextOfConstantValue(enumMemberValue));
             }
+            write(",");
+            writeLine();
         }
-        function checkGrammarClassDeclarationHeritageClauses(node) {
-            var seenExtendsClause = false;
-            var seenImplementsClause = false;
-            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && node.heritageClauses) {
-                for (var _i = 0, _a = node.heritageClauses; _i < _a.length; _i++) {
-                    var heritageClause = _a[_i];
-                    if (heritageClause.token === 83 /* ExtendsKeyword */) {
-                        if (seenExtendsClause) {
-                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.extends_clause_already_seen);
-                        }
-                        if (seenImplementsClause) {
-                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.extends_clause_must_precede_implements_clause);
-                        }
-                        if (heritageClause.types.length > 1) {
-                            return grammarErrorOnFirstToken(heritageClause.types[1], ts.Diagnostics.Classes_can_only_extend_a_single_class);
-                        }
-                        seenExtendsClause = true;
+        function isPrivateMethodTypeParameter(node) {
+            return node.parent.kind === 151 /* MethodDeclaration */ && ts.hasModifier(node.parent, 8 /* Private */);
+        }
+        function emitTypeParameters(typeParameters) {
+            function emitTypeParameter(node) {
+                increaseIndent();
+                emitJsDocComments(node);
+                decreaseIndent();
+                writeTextOfNode(currentText, node.name);
+                // If there is constraint present and this is not a type parameter of the private method emit the constraint
+                if (node.constraint && !isPrivateMethodTypeParameter(node)) {
+                    write(" extends ");
+                    if (node.parent.kind === 160 /* FunctionType */ ||
+                        node.parent.kind === 161 /* ConstructorType */ ||
+                        (node.parent.parent && node.parent.parent.kind === 163 /* TypeLiteral */)) {
+                        ts.Debug.assert(node.parent.kind === 151 /* MethodDeclaration */ ||
+                            node.parent.kind === 150 /* MethodSignature */ ||
+                            node.parent.kind === 160 /* FunctionType */ ||
+                            node.parent.kind === 161 /* ConstructorType */ ||
+                            node.parent.kind === 155 /* CallSignature */ ||
+                            node.parent.kind === 156 /* ConstructSignature */);
+                        emitType(node.constraint);
                     }
                     else {
-                        ts.Debug.assert(heritageClause.token === 106 /* ImplementsKeyword */);
-                        if (seenImplementsClause) {
-                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.implements_clause_already_seen);
-                        }
-                        seenImplementsClause = true;
+                        emitTypeWithNewGetSymbolAccessibilityDiagnostic(node.constraint, getTypeParameterConstraintVisibilityError);
                     }
-                    // Grammar checking heritageClause inside class declaration
-                    checkGrammarHeritageClause(heritageClause);
                 }
-            }
-        }
-        function checkGrammarInterfaceDeclaration(node) {
-            var seenExtendsClause = false;
-            if (node.heritageClauses) {
-                for (var _i = 0, _a = node.heritageClauses; _i < _a.length; _i++) {
-                    var heritageClause = _a[_i];
-                    if (heritageClause.token === 83 /* ExtendsKeyword */) {
-                        if (seenExtendsClause) {
-                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.extends_clause_already_seen);
-                        }
-                        seenExtendsClause = true;
+                if (node.default && !isPrivateMethodTypeParameter(node)) {
+                    write(" = ");
+                    if (node.parent.kind === 160 /* FunctionType */ ||
+                        node.parent.kind === 161 /* ConstructorType */ ||
+                        (node.parent.parent && node.parent.parent.kind === 163 /* TypeLiteral */)) {
+                        ts.Debug.assert(node.parent.kind === 151 /* MethodDeclaration */ ||
+                            node.parent.kind === 150 /* MethodSignature */ ||
+                            node.parent.kind === 160 /* FunctionType */ ||
+                            node.parent.kind === 161 /* ConstructorType */ ||
+                            node.parent.kind === 155 /* CallSignature */ ||
+                            node.parent.kind === 156 /* ConstructSignature */);
+                        emitType(node.default);
                     }
                     else {
-                        ts.Debug.assert(heritageClause.token === 106 /* ImplementsKeyword */);
-                        return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.Interface_declaration_cannot_have_implements_clause);
+                        emitTypeWithNewGetSymbolAccessibilityDiagnostic(node.default, getTypeParameterConstraintVisibilityError);
                     }
-                    // Grammar checking heritageClause inside class declaration
-                    checkGrammarHeritageClause(heritageClause);
+                }
+                function getTypeParameterConstraintVisibilityError() {
+                    // Type parameter constraints are named by user so we should always be able to name it
+                    var diagnosticMessage;
+                    switch (node.parent.kind) {
+                        case 229 /* ClassDeclaration */:
+                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_class_has_or_is_using_private_name_1;
+                            break;
+                        case 230 /* InterfaceDeclaration */:
+                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1;
+                            break;
+                        case 156 /* ConstructSignature */:
+                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1;
+                            break;
+                        case 155 /* CallSignature */:
+                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1;
+                            break;
+                        case 151 /* MethodDeclaration */:
+                        case 150 /* MethodSignature */:
+                            if (ts.hasModifier(node.parent, 32 /* Static */)) {
+                                diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1;
+                            }
+                            else if (node.parent.parent.kind === 229 /* ClassDeclaration */) {
+                                diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1;
+                            }
+                            else {
+                                diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1;
+                            }
+                            break;
+                        case 228 /* FunctionDeclaration */:
+                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_function_has_or_is_using_private_name_1;
+                            break;
+                        case 231 /* TypeAliasDeclaration */:
+                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_type_alias_has_or_is_using_private_name_1;
+                            break;
+                        default:
+                            ts.Debug.fail("This is unknown parent for type parameter: " + node.parent.kind);
+                    }
+                    return {
+                        diagnosticMessage: diagnosticMessage,
+                        errorNode: node,
+                        typeName: node.name
+                    };
                 }
             }
-            return false;
-        }
-        function checkGrammarComputedPropertyName(node) {
-            // If node is not a computedPropertyName, just skip the grammar checking
-            if (node.kind !== 140 /* ComputedPropertyName */) {
-                return false;
-            }
-            var computedPropertyName = node;
-            if (computedPropertyName.expression.kind === 187 /* BinaryExpression */ && computedPropertyName.expression.operatorToken.kind === 24 /* CommaToken */) {
-                return grammarErrorOnNode(computedPropertyName.expression, ts.Diagnostics.A_comma_expression_is_not_allowed_in_a_computed_property_name);
+            if (typeParameters) {
+                write("<");
+                emitCommaList(typeParameters, emitTypeParameter);
+                write(">");
             }
         }
-        function checkGrammarForGenerator(node) {
-            if (node.asteriskToken) {
-                ts.Debug.assert(node.kind === 220 /* FunctionDeclaration */ ||
-                    node.kind === 179 /* FunctionExpression */ ||
-                    node.kind === 147 /* MethodDeclaration */);
-                if (ts.isInAmbientContext(node)) {
-                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.Generators_are_not_allowed_in_an_ambient_context);
+        function emitHeritageClause(typeReferences, isImplementsList) {
+            if (typeReferences) {
+                write(isImplementsList ? " implements " : " extends ");
+                emitCommaList(typeReferences, emitTypeOfTypeReference);
+            }
+            function emitTypeOfTypeReference(node) {
+                if (ts.isEntityNameExpression(node.expression)) {
+                    emitTypeWithNewGetSymbolAccessibilityDiagnostic(node, getHeritageClauseVisibilityError);
                 }
-                if (!node.body) {
-                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.An_overload_signature_cannot_be_declared_as_a_generator);
+                else if (!isImplementsList && node.expression.kind === 95 /* NullKeyword */) {
+                    write("null");
                 }
-                if (languageVersion < 2 /* ES6 */) {
-                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher);
+                function getHeritageClauseVisibilityError() {
+                    var diagnosticMessage;
+                    // Heritage clause is written by user so it can always be named
+                    if (node.parent.parent.kind === 229 /* ClassDeclaration */) {
+                        // Class or Interface implemented/extended is inaccessible
+                        diagnosticMessage = isImplementsList ?
+                            ts.Diagnostics.Implements_clause_of_exported_class_0_has_or_is_using_private_name_1 :
+                            ts.Diagnostics.extends_clause_of_exported_class_0_has_or_is_using_private_name_1;
+                    }
+                    else {
+                        // interface is inaccessible
+                        diagnosticMessage = ts.Diagnostics.extends_clause_of_exported_interface_0_has_or_is_using_private_name_1;
+                    }
+                    return {
+                        diagnosticMessage: diagnosticMessage,
+                        errorNode: node,
+                        typeName: ts.getNameOfDeclaration(node.parent.parent)
+                    };
                 }
             }
         }
-        function checkGrammarForInvalidQuestionMark(node, questionToken, message) {
-            if (questionToken) {
-                return grammarErrorOnNode(questionToken, message);
-            }
-        }
-        function checkGrammarObjectLiteralExpression(node, inDestructuring) {
-            var seen = ts.createMap();
-            var Property = 1;
-            var GetAccessor = 2;
-            var SetAccessor = 4;
-            var GetOrSetAccessor = GetAccessor | SetAccessor;
-            for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
-                var prop = _a[_i];
-                var name_24 = prop.name;
-                if (prop.kind === 193 /* OmittedExpression */ ||
-                    name_24.kind === 140 /* ComputedPropertyName */) {
-                    // If the name is not a ComputedPropertyName, the grammar checking will skip it
-                    checkGrammarComputedPropertyName(name_24);
-                }
-                if (prop.kind === 254 /* ShorthandPropertyAssignment */ && !inDestructuring && prop.objectAssignmentInitializer) {
-                    // having objectAssignmentInitializer is only valid in ObjectAssignmentPattern
-                    // outside of destructuring it is a syntax error
-                    return grammarErrorOnNode(prop.equalsToken, ts.Diagnostics.can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment);
-                }
-                // Modifiers are never allowed on properties except for 'async' on a method declaration
-                if (prop.modifiers) {
-                    for (var _b = 0, _c = prop.modifiers; _b < _c.length; _b++) {
-                        var mod = _c[_b];
-                        if (mod.kind !== 118 /* AsyncKeyword */ || prop.kind !== 147 /* MethodDeclaration */) {
-                            grammarErrorOnNode(mod, ts.Diagnostics._0_modifier_cannot_be_used_here, ts.getTextOfNode(mod));
+        function writeClassDeclaration(node) {
+            function emitParameterProperties(constructorDeclaration) {
+                if (constructorDeclaration) {
+                    ts.forEach(constructorDeclaration.parameters, function (param) {
+                        if (ts.hasModifier(param, 92 /* ParameterPropertyModifier */)) {
+                            emitPropertyDeclaration(param);
                         }
-                    }
+                    });
                 }
-                // ECMA-262 11.1.5 Object Initializer
-                // If previous is not undefined then throw a SyntaxError exception if any of the following conditions are true
-                // a.This production is contained in strict code and IsDataDescriptor(previous) is true and
-                // IsDataDescriptor(propId.descriptor) is true.
-                //    b.IsDataDescriptor(previous) is true and IsAccessorDescriptor(propId.descriptor) is true.
-                //    c.IsAccessorDescriptor(previous) is true and IsDataDescriptor(propId.descriptor) is true.
-                //    d.IsAccessorDescriptor(previous) is true and IsAccessorDescriptor(propId.descriptor) is true
-                // and either both previous and propId.descriptor have[[Get]] fields or both previous and propId.descriptor have[[Set]] fields
-                var currentKind = void 0;
-                if (prop.kind === 253 /* PropertyAssignment */ || prop.kind === 254 /* ShorthandPropertyAssignment */) {
-                    // Grammar checking for computedPropertyName and shorthandPropertyAssignment
-                    checkGrammarForInvalidQuestionMark(prop, prop.questionToken, ts.Diagnostics.An_object_member_cannot_be_declared_optional);
-                    if (name_24.kind === 8 /* NumericLiteral */) {
-                        checkGrammarNumericLiteral(name_24);
+            }
+            var prevEnclosingDeclaration = enclosingDeclaration;
+            enclosingDeclaration = node;
+            var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
+            var tempVarName;
+            if (baseTypeNode && !ts.isEntityNameExpression(baseTypeNode.expression)) {
+                tempVarName = baseTypeNode.expression.kind === 95 /* NullKeyword */ ?
+                    "null" :
+                    emitTempVariableDeclaration(baseTypeNode.expression, node.name.text + "_base", {
+                        diagnosticMessage: ts.Diagnostics.extends_clause_of_exported_class_0_has_or_is_using_private_name_1,
+                        errorNode: baseTypeNode,
+                        typeName: node.name
+                    }, !ts.findAncestor(node, function (n) { return n.kind === 233 /* ModuleDeclaration */; }));
+            }
+            emitJsDocComments(node);
+            emitModuleElementDeclarationFlags(node);
+            if (ts.hasModifier(node, 128 /* Abstract */)) {
+                write("abstract ");
+            }
+            write("class ");
+            writeTextOfNode(currentText, node.name);
+            emitTypeParameters(node.typeParameters);
+            if (baseTypeNode) {
+                if (!ts.isEntityNameExpression(baseTypeNode.expression)) {
+                    write(" extends ");
+                    write(tempVarName);
+                    if (baseTypeNode.typeArguments) {
+                        write("<");
+                        emitCommaList(baseTypeNode.typeArguments, emitType);
+                        write(">");
                     }
-                    currentKind = Property;
-                }
-                else if (prop.kind === 147 /* MethodDeclaration */) {
-                    currentKind = Property;
-                }
-                else if (prop.kind === 149 /* GetAccessor */) {
-                    currentKind = GetAccessor;
-                }
-                else if (prop.kind === 150 /* SetAccessor */) {
-                    currentKind = SetAccessor;
                 }
                 else {
-                    ts.Debug.fail("Unexpected syntax kind:" + prop.kind);
-                }
-                var effectiveName = ts.getPropertyNameForPropertyNameNode(name_24);
-                if (effectiveName === undefined) {
-                    continue;
+                    emitHeritageClause([baseTypeNode], /*isImplementsList*/ false);
                 }
-                if (!seen[effectiveName]) {
-                    seen[effectiveName] = currentKind;
+            }
+            emitHeritageClause(ts.getClassImplementsHeritageClauseElements(node), /*isImplementsList*/ true);
+            write(" {");
+            writeLine();
+            increaseIndent();
+            emitParameterProperties(ts.getFirstConstructorWithBody(node));
+            emitLines(node.members);
+            decreaseIndent();
+            write("}");
+            writeLine();
+            enclosingDeclaration = prevEnclosingDeclaration;
+        }
+        function writeInterfaceDeclaration(node) {
+            emitJsDocComments(node);
+            emitModuleElementDeclarationFlags(node);
+            write("interface ");
+            writeTextOfNode(currentText, node.name);
+            var prevEnclosingDeclaration = enclosingDeclaration;
+            enclosingDeclaration = node;
+            emitTypeParameters(node.typeParameters);
+            var interfaceExtendsTypes = ts.filter(ts.getInterfaceBaseTypeNodes(node), function (base) { return ts.isEntityNameExpression(base.expression); });
+            if (interfaceExtendsTypes && interfaceExtendsTypes.length) {
+                emitHeritageClause(interfaceExtendsTypes, /*isImplementsList*/ false);
+            }
+            write(" {");
+            writeLine();
+            increaseIndent();
+            emitLines(node.members);
+            decreaseIndent();
+            write("}");
+            writeLine();
+            enclosingDeclaration = prevEnclosingDeclaration;
+        }
+        function emitPropertyDeclaration(node) {
+            if (ts.hasDynamicName(node)) {
+                return;
+            }
+            emitJsDocComments(node);
+            emitClassMemberDeclarationFlags(ts.getModifierFlags(node));
+            emitVariableDeclaration(node);
+            write(";");
+            writeLine();
+        }
+        function emitVariableDeclaration(node) {
+            // If we are emitting property it isn't moduleElement and hence we already know it needs to be emitted
+            // so there is no check needed to see if declaration is visible
+            if (node.kind !== 226 /* VariableDeclaration */ || resolver.isDeclarationVisible(node)) {
+                if (ts.isBindingPattern(node.name)) {
+                    emitBindingPattern(node.name);
                 }
                 else {
-                    var existingKind = seen[effectiveName];
-                    if (currentKind === Property && existingKind === Property) {
-                        grammarErrorOnNode(name_24, ts.Diagnostics.Duplicate_identifier_0, ts.getTextOfNode(name_24));
+                    // If this node is a computed name, it can only be a symbol, because we've already skipped
+                    // it if it's not a well known symbol. In that case, the text of the name will be exactly
+                    // what we want, namely the name expression enclosed in brackets.
+                    writeTextOfNode(currentText, node.name);
+                    // If optional property emit ? but in the case of parameterProperty declaration with "?" indicating optional parameter for the constructor
+                    // we don't want to emit property declaration with "?"
+                    if ((node.kind === 149 /* PropertyDeclaration */ || node.kind === 148 /* PropertySignature */ ||
+                        (node.kind === 146 /* Parameter */ && !ts.isParameterPropertyDeclaration(node))) && ts.hasQuestionToken(node)) {
+                        write("?");
                     }
-                    else if ((currentKind & GetOrSetAccessor) && (existingKind & GetOrSetAccessor)) {
-                        if (existingKind !== GetOrSetAccessor && currentKind !== existingKind) {
-                            seen[effectiveName] = currentKind | existingKind;
-                        }
-                        else {
-                            return grammarErrorOnNode(name_24, ts.Diagnostics.An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name);
-                        }
+                    if ((node.kind === 149 /* PropertyDeclaration */ || node.kind === 148 /* PropertySignature */) && node.parent.kind === 163 /* TypeLiteral */) {
+                        emitTypeOfVariableDeclarationFromTypeLiteral(node);
                     }
-                    else {
-                        return grammarErrorOnNode(name_24, ts.Diagnostics.An_object_literal_cannot_have_property_and_accessor_with_the_same_name);
+                    else if (resolver.isLiteralConstDeclaration(node)) {
+                        write(" = ");
+                        resolver.writeLiteralConstValue(node, writer);
+                    }
+                    else if (!ts.hasModifier(node, 8 /* Private */)) {
+                        writeTypeOfDeclaration(node, node.type, getVariableDeclarationTypeVisibilityError);
                     }
                 }
             }
-        }
-        function checkGrammarJsxElement(node) {
-            var seen = ts.createMap();
-            for (var _i = 0, _a = node.attributes; _i < _a.length; _i++) {
-                var attr = _a[_i];
-                if (attr.kind === 247 /* JsxSpreadAttribute */) {
-                    continue;
-                }
-                var jsxAttr = attr;
-                var name_25 = jsxAttr.name;
-                if (!seen[name_25.text]) {
-                    seen[name_25.text] = true;
-                }
-                else {
-                    return grammarErrorOnNode(name_25, ts.Diagnostics.JSX_elements_cannot_have_multiple_attributes_with_the_same_name);
-                }
-                var initializer = jsxAttr.initializer;
-                if (initializer && initializer.kind === 248 /* JsxExpression */ && !initializer.expression) {
-                    return grammarErrorOnNode(jsxAttr.initializer, ts.Diagnostics.JSX_attributes_must_only_be_assigned_a_non_empty_expression);
-                }
-            }
-        }
-        function checkGrammarForInOrForOfStatement(forInOrOfStatement) {
-            if (checkGrammarStatementInAmbientContext(forInOrOfStatement)) {
-                return true;
-            }
-            if (forInOrOfStatement.initializer.kind === 219 /* VariableDeclarationList */) {
-                var variableList = forInOrOfStatement.initializer;
-                if (!checkGrammarVariableDeclarationList(variableList)) {
-                    var declarations = variableList.declarations;
-                    // declarations.length can be zero if there is an error in variable declaration in for-of or for-in
-                    // See http://www.ecma-international.org/ecma-262/6.0/#sec-for-in-and-for-of-statements for details
-                    // For example:
-                    //      var let = 10;
-                    //      for (let of [1,2,3]) {} // this is invalid ES6 syntax
-                    //      for (let in [1,2,3]) {} // this is invalid ES6 syntax
-                    // We will then want to skip on grammar checking on variableList declaration
-                    if (!declarations.length) {
-                        return false;
-                    }
-                    if (declarations.length > 1) {
-                        var diagnostic = forInOrOfStatement.kind === 207 /* ForInStatement */
-                            ? ts.Diagnostics.Only_a_single_variable_declaration_is_allowed_in_a_for_in_statement
-                            : ts.Diagnostics.Only_a_single_variable_declaration_is_allowed_in_a_for_of_statement;
-                        return grammarErrorOnFirstToken(variableList.declarations[1], diagnostic);
+            function getVariableDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult) {
+                if (node.kind === 226 /* VariableDeclaration */) {
+                    return symbolAccessibilityResult.errorModuleName ?
+                        symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                            ts.Diagnostics.Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                            ts.Diagnostics.Exported_variable_0_has_or_is_using_name_1_from_private_module_2 :
+                        ts.Diagnostics.Exported_variable_0_has_or_is_using_private_name_1;
+                }
+                else if (node.kind === 149 /* PropertyDeclaration */ || node.kind === 148 /* PropertySignature */ ||
+                    (node.kind === 146 /* Parameter */ && ts.hasModifier(node.parent, 8 /* Private */))) {
+                    // TODO(jfreeman): Deal with computed properties in error reporting.
+                    if (ts.hasModifier(node, 32 /* Static */)) {
+                        return symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                                ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                                ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_private_name_1;
                     }
-                    var firstDeclaration = declarations[0];
-                    if (firstDeclaration.initializer) {
-                        var diagnostic = forInOrOfStatement.kind === 207 /* ForInStatement */
-                            ? ts.Diagnostics.The_variable_declaration_of_a_for_in_statement_cannot_have_an_initializer
-                            : ts.Diagnostics.The_variable_declaration_of_a_for_of_statement_cannot_have_an_initializer;
-                        return grammarErrorOnNode(firstDeclaration.name, diagnostic);
+                    else if (node.parent.kind === 229 /* ClassDeclaration */ || node.kind === 146 /* Parameter */) {
+                        return symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                                ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                                ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_private_name_1;
                     }
-                    if (firstDeclaration.type) {
-                        var diagnostic = forInOrOfStatement.kind === 207 /* ForInStatement */
-                            ? ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation
-                            : ts.Diagnostics.The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation;
-                        return grammarErrorOnNode(firstDeclaration, diagnostic);
+                    else {
+                        // Interfaces cannot have types that cannot be named
+                        return symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Property_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Property_0_of_exported_interface_has_or_is_using_private_name_1;
                     }
                 }
             }
-            return false;
-        }
-        function checkGrammarAccessor(accessor) {
-            var kind = accessor.kind;
-            if (languageVersion < 1 /* ES5 */) {
-                return grammarErrorOnNode(accessor.name, ts.Diagnostics.Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher);
-            }
-            else if (ts.isInAmbientContext(accessor)) {
-                return grammarErrorOnNode(accessor.name, ts.Diagnostics.An_accessor_cannot_be_declared_in_an_ambient_context);
-            }
-            else if (accessor.body === undefined && !(ts.getModifierFlags(accessor) & 128 /* Abstract */)) {
-                return grammarErrorAtPos(ts.getSourceFileOfNode(accessor), accessor.end - 1, ";".length, ts.Diagnostics._0_expected, "{");
-            }
-            else if (accessor.typeParameters) {
-                return grammarErrorOnNode(accessor.name, ts.Diagnostics.An_accessor_cannot_have_type_parameters);
+            function getVariableDeclarationTypeVisibilityError(symbolAccessibilityResult) {
+                var diagnosticMessage = getVariableDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult);
+                return diagnosticMessage !== undefined ? {
+                    diagnosticMessage: diagnosticMessage,
+                    errorNode: node,
+                    typeName: node.name
+                } : undefined;
             }
-            else if (!doesAccessorHaveCorrectParameterCount(accessor)) {
-                return grammarErrorOnNode(accessor.name, kind === 149 /* GetAccessor */ ?
-                    ts.Diagnostics.A_get_accessor_cannot_have_parameters :
-                    ts.Diagnostics.A_set_accessor_must_have_exactly_one_parameter);
+            function emitBindingPattern(bindingPattern) {
+                // Only select non-omitted expression from the bindingPattern's elements.
+                // We have to do this to avoid emitting trailing commas.
+                // For example:
+                //      original: var [, c,,] = [ 2,3,4]
+                //      emitted: declare var c: number; // instead of declare var c:number, ;
+                var elements = [];
+                for (var _i = 0, _a = bindingPattern.elements; _i < _a.length; _i++) {
+                    var element = _a[_i];
+                    if (element.kind !== 200 /* OmittedExpression */) {
+                        elements.push(element);
+                    }
+                }
+                emitCommaList(elements, emitBindingElement);
             }
-            else if (kind === 150 /* SetAccessor */) {
-                if (accessor.type) {
-                    return grammarErrorOnNode(accessor.name, ts.Diagnostics.A_set_accessor_cannot_have_a_return_type_annotation);
+            function emitBindingElement(bindingElement) {
+                function getBindingElementTypeVisibilityError(symbolAccessibilityResult) {
+                    var diagnosticMessage = getVariableDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult);
+                    return diagnosticMessage !== undefined ? {
+                        diagnosticMessage: diagnosticMessage,
+                        errorNode: bindingElement,
+                        typeName: bindingElement.name
+                    } : undefined;
                 }
-                else {
-                    var parameter = accessor.parameters[0];
-                    if (parameter.dotDotDotToken) {
-                        return grammarErrorOnNode(parameter.dotDotDotToken, ts.Diagnostics.A_set_accessor_cannot_have_rest_parameter);
-                    }
-                    else if (parameter.questionToken) {
-                        return grammarErrorOnNode(parameter.questionToken, ts.Diagnostics.A_set_accessor_cannot_have_an_optional_parameter);
+                if (bindingElement.name) {
+                    if (ts.isBindingPattern(bindingElement.name)) {
+                        emitBindingPattern(bindingElement.name);
                     }
-                    else if (parameter.initializer) {
-                        return grammarErrorOnNode(accessor.name, ts.Diagnostics.A_set_accessor_parameter_cannot_have_an_initializer);
+                    else {
+                        writeTextOfNode(currentText, bindingElement.name);
+                        writeTypeOfDeclaration(bindingElement, /*type*/ undefined, getBindingElementTypeVisibilityError);
                     }
                 }
             }
         }
-        /** Does the accessor have the right number of parameters?
-
-            A get accessor has no parameters or a single `this` parameter.
-            A set accessor has one parameter or a `this` parameter and one more parameter */
-        function doesAccessorHaveCorrectParameterCount(accessor) {
-            return getAccessorThisParameter(accessor) || accessor.parameters.length === (accessor.kind === 149 /* GetAccessor */ ? 0 : 1);
-        }
-        function getAccessorThisParameter(accessor) {
-            if (accessor.parameters.length === (accessor.kind === 149 /* GetAccessor */ ? 1 : 2) &&
-                accessor.parameters[0].name.kind === 69 /* Identifier */ &&
-                accessor.parameters[0].name.originalKeywordKind === 97 /* ThisKeyword */) {
-                return accessor.parameters[0];
+        function emitTypeOfVariableDeclarationFromTypeLiteral(node) {
+            // if this is property of type literal,
+            // or is parameter of method/call/construct/index signature of type literal
+            // emit only if type is specified
+            if (node.type) {
+                write(": ");
+                emitType(node.type);
             }
         }
-        function getFunctionLikeThisParameter(func) {
-            if (func.parameters.length &&
-                func.parameters[0].name.kind === 69 /* Identifier */ &&
-                func.parameters[0].name.originalKeywordKind === 97 /* ThisKeyword */) {
-                return func.parameters[0];
-            }
+        function isVariableStatementVisible(node) {
+            return ts.forEach(node.declarationList.declarations, function (varDeclaration) { return resolver.isDeclarationVisible(varDeclaration); });
         }
-        function checkGrammarForNonSymbolComputedProperty(node, message) {
-            if (ts.isDynamicName(node)) {
-                return grammarErrorOnNode(node, message);
+        function writeVariableStatement(node) {
+            emitJsDocComments(node);
+            emitModuleElementDeclarationFlags(node);
+            if (ts.isLet(node.declarationList)) {
+                write("let ");
+            }
+            else if (ts.isConst(node.declarationList)) {
+                write("const ");
+            }
+            else {
+                write("var ");
             }
+            emitCommaList(node.declarationList.declarations, emitVariableDeclaration, resolver.isDeclarationVisible);
+            write(";");
+            writeLine();
         }
-        function checkGrammarMethod(node) {
-            if (checkGrammarDisallowedModifiersOnObjectLiteralExpressionMethod(node) ||
-                checkGrammarFunctionLikeDeclaration(node) ||
-                checkGrammarForGenerator(node)) {
-                return true;
+        function emitAccessorDeclaration(node) {
+            if (ts.hasDynamicName(node)) {
+                return;
             }
-            if (node.parent.kind === 171 /* ObjectLiteralExpression */) {
-                if (checkGrammarForInvalidQuestionMark(node, node.questionToken, ts.Diagnostics.An_object_member_cannot_be_declared_optional)) {
-                    return true;
+            var accessors = ts.getAllAccessorDeclarations(node.parent.members, node);
+            var accessorWithTypeAnnotation;
+            if (node === accessors.firstAccessor) {
+                emitJsDocComments(accessors.getAccessor);
+                emitJsDocComments(accessors.setAccessor);
+                emitClassMemberDeclarationFlags(ts.getModifierFlags(node) | (accessors.setAccessor ? 0 : 64 /* Readonly */));
+                writeTextOfNode(currentText, node.name);
+                if (!ts.hasModifier(node, 8 /* Private */)) {
+                    accessorWithTypeAnnotation = node;
+                    var type = getTypeAnnotationFromAccessor(node);
+                    if (!type) {
+                        // couldn't get type for the first accessor, try the another one
+                        var anotherAccessor = node.kind === 153 /* GetAccessor */ ? accessors.setAccessor : accessors.getAccessor;
+                        type = getTypeAnnotationFromAccessor(anotherAccessor);
+                        if (type) {
+                            accessorWithTypeAnnotation = anotherAccessor;
+                        }
+                    }
+                    writeTypeOfDeclaration(node, type, getAccessorDeclarationTypeVisibilityError);
                 }
-                else if (node.body === undefined) {
-                    return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.end - 1, ";".length, ts.Diagnostics._0_expected, "{");
+                write(";");
+                writeLine();
+            }
+            function getTypeAnnotationFromAccessor(accessor) {
+                if (accessor) {
+                    return accessor.kind === 153 /* GetAccessor */
+                        ? accessor.type // Getter - return type
+                        : accessor.parameters.length > 0
+                            ? accessor.parameters[0].type // Setter parameter type
+                            : undefined;
                 }
             }
-            if (ts.isClassLike(node.parent)) {
-                // Technically, computed properties in ambient contexts is disallowed
-                // for property declarations and accessors too, not just methods.
-                // However, property declarations disallow computed names in general,
-                // and accessors are not allowed in ambient contexts in general,
-                // so this error only really matters for methods.
-                if (ts.isInAmbientContext(node)) {
-                    return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_an_ambient_context_must_directly_refer_to_a_built_in_symbol);
+            function getAccessorDeclarationTypeVisibilityError(symbolAccessibilityResult) {
+                var diagnosticMessage;
+                if (accessorWithTypeAnnotation.kind === 154 /* SetAccessor */) {
+                    // Setters have to have type named and cannot infer it so, the type should always be named
+                    if (ts.hasModifier(accessorWithTypeAnnotation.parent, 32 /* Static */)) {
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_private_name_1;
+                    }
+                    else {
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_private_name_1;
+                    }
+                    return {
+                        diagnosticMessage: diagnosticMessage,
+                        errorNode: accessorWithTypeAnnotation.parameters[0],
+                        // TODO(jfreeman): Investigate why we are passing node.name instead of node.parameters[0].name
+                        typeName: accessorWithTypeAnnotation.name
+                    };
                 }
-                else if (!node.body) {
-                    return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_method_overload_must_directly_refer_to_a_built_in_symbol);
+                else {
+                    if (ts.hasModifier(accessorWithTypeAnnotation, 32 /* Static */)) {
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                                ts.Diagnostics.Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
+                                ts.Diagnostics.Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
+                            ts.Diagnostics.Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_private_name_0;
+                    }
+                    else {
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                                ts.Diagnostics.Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
+                                ts.Diagnostics.Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
+                            ts.Diagnostics.Return_type_of_public_property_getter_from_exported_class_has_or_is_using_private_name_0;
+                    }
+                    return {
+                        diagnosticMessage: diagnosticMessage,
+                        errorNode: accessorWithTypeAnnotation.name,
+                        typeName: undefined
+                    };
                 }
             }
-            else if (node.parent.kind === 222 /* InterfaceDeclaration */) {
-                return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol);
-            }
-            else if (node.parent.kind === 159 /* TypeLiteral */) {
-                return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol);
-            }
         }
-        function checkGrammarBreakOrContinueStatement(node) {
-            var current = node;
-            while (current) {
-                if (ts.isFunctionLike(current)) {
-                    return grammarErrorOnNode(node, ts.Diagnostics.Jump_target_cannot_cross_function_boundary);
+        function writeFunctionDeclaration(node) {
+            if (ts.hasDynamicName(node)) {
+                return;
+            }
+            // If we are emitting Method/Constructor it isn't moduleElement and hence already determined to be emitting
+            // so no need to verify if the declaration is visible
+            if (!resolver.isImplementationOfOverload(node)) {
+                emitJsDocComments(node);
+                if (node.kind === 228 /* FunctionDeclaration */) {
+                    emitModuleElementDeclarationFlags(node);
                 }
-                switch (current.kind) {
-                    case 214 /* LabeledStatement */:
-                        if (node.label && current.label.text === node.label.text) {
-                            // found matching label - verify that label usage is correct
-                            // continue can only target labels that are on iteration statements
-                            var isMisplacedContinueLabel = node.kind === 209 /* ContinueStatement */
-                                && !ts.isIterationStatement(current.statement, /*lookInLabeledStatement*/ true);
-                            if (isMisplacedContinueLabel) {
-                                return grammarErrorOnNode(node, ts.Diagnostics.A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement);
-                            }
-                            return false;
-                        }
-                        break;
-                    case 213 /* SwitchStatement */:
-                        if (node.kind === 210 /* BreakStatement */ && !node.label) {
-                            // unlabeled break within switch statement - ok
-                            return false;
-                        }
-                        break;
-                    default:
-                        if (ts.isIterationStatement(current, /*lookInLabeledStatement*/ false) && !node.label) {
-                            // unlabeled break or continue within iteration statement - ok
-                            return false;
-                        }
-                        break;
+                else if (node.kind === 151 /* MethodDeclaration */ || node.kind === 152 /* Constructor */) {
+                    emitClassMemberDeclarationFlags(ts.getModifierFlags(node));
                 }
-                current = current.parent;
-            }
-            if (node.label) {
-                var message = node.kind === 210 /* BreakStatement */
-                    ? ts.Diagnostics.A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement
-                    : ts.Diagnostics.A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement;
-                return grammarErrorOnNode(node, message);
-            }
-            else {
-                var message = node.kind === 210 /* BreakStatement */
-                    ? ts.Diagnostics.A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement
-                    : ts.Diagnostics.A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement;
-                return grammarErrorOnNode(node, message);
-            }
-        }
-        function checkGrammarBindingElement(node) {
-            if (node.dotDotDotToken) {
-                var elements = node.parent.elements;
-                if (node !== ts.lastOrUndefined(elements)) {
-                    return grammarErrorOnNode(node, ts.Diagnostics.A_rest_element_must_be_last_in_an_array_destructuring_pattern);
+                if (node.kind === 228 /* FunctionDeclaration */) {
+                    write("function ");
+                    writeTextOfNode(currentText, node.name);
                 }
-                if (node.name.kind === 168 /* ArrayBindingPattern */ || node.name.kind === 167 /* ObjectBindingPattern */) {
-                    return grammarErrorOnNode(node.name, ts.Diagnostics.A_rest_element_cannot_contain_a_binding_pattern);
+                else if (node.kind === 152 /* Constructor */) {
+                    write("constructor");
                 }
-                if (node.initializer) {
-                    // Error on equals token which immediate precedes the initializer
-                    return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.initializer.pos - 1, 1, ts.Diagnostics.A_rest_element_cannot_have_an_initializer);
+                else {
+                    writeTextOfNode(currentText, node.name);
+                    if (ts.hasQuestionToken(node)) {
+                        write("?");
+                    }
                 }
+                emitSignatureDeclaration(node);
             }
         }
-        function isStringOrNumberLiteralExpression(expr) {
-            return expr.kind === 9 /* StringLiteral */ || expr.kind === 8 /* NumericLiteral */ ||
-                expr.kind === 185 /* PrefixUnaryExpression */ && expr.operator === 36 /* MinusToken */ &&
-                    expr.operand.kind === 8 /* NumericLiteral */;
+        function emitSignatureDeclarationWithJsDocComments(node) {
+            emitJsDocComments(node);
+            emitSignatureDeclaration(node);
         }
-        function checkGrammarVariableDeclaration(node) {
-            if (node.parent.parent.kind !== 207 /* ForInStatement */ && node.parent.parent.kind !== 208 /* ForOfStatement */) {
-                if (ts.isInAmbientContext(node)) {
-                    if (node.initializer) {
-                        if (ts.isConst(node) && !node.type) {
-                            if (!isStringOrNumberLiteralExpression(node.initializer)) {
-                                return grammarErrorOnNode(node.initializer, ts.Diagnostics.A_const_initializer_in_an_ambient_context_must_be_a_string_or_numeric_literal);
-                            }
-                        }
-                        else {
-                            // Error on equals token which immediate precedes the initializer
-                            var equalsTokenLength = "=".length;
-                            return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.initializer.pos - equalsTokenLength, equalsTokenLength, ts.Diagnostics.Initializers_are_not_allowed_in_ambient_contexts);
-                        }
-                    }
-                    if (node.initializer && !(ts.isConst(node) && isStringOrNumberLiteralExpression(node.initializer))) {
-                        // Error on equals token which immediate precedes the initializer
-                        var equalsTokenLength = "=".length;
-                        return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.initializer.pos - equalsTokenLength, equalsTokenLength, ts.Diagnostics.Initializers_are_not_allowed_in_ambient_contexts);
-                    }
+        function emitSignatureDeclaration(node) {
+            var prevEnclosingDeclaration = enclosingDeclaration;
+            enclosingDeclaration = node;
+            var closeParenthesizedFunctionType = false;
+            if (node.kind === 157 /* IndexSignature */) {
+                // Index signature can have readonly modifier
+                emitClassMemberDeclarationFlags(ts.getModifierFlags(node));
+                write("[");
+            }
+            else {
+                if (node.kind === 152 /* Constructor */ && ts.hasModifier(node, 8 /* Private */)) {
+                    write("();");
+                    writeLine();
+                    return;
                 }
-                else if (!node.initializer) {
-                    if (ts.isBindingPattern(node.name) && !ts.isBindingPattern(node.parent)) {
-                        return grammarErrorOnNode(node, ts.Diagnostics.A_destructuring_declaration_must_have_an_initializer);
-                    }
-                    if (ts.isConst(node)) {
-                        return grammarErrorOnNode(node, ts.Diagnostics.const_declarations_must_be_initialized);
+                // Construct signature or constructor type write new Signature
+                if (node.kind === 156 /* ConstructSignature */ || node.kind === 161 /* ConstructorType */) {
+                    write("new ");
+                }
+                else if (node.kind === 160 /* FunctionType */) {
+                    var currentOutput = writer.getText();
+                    // Do not generate incorrect type when function type with type parameters is type argument
+                    // This could happen if user used space between two '<' making it error free
+                    // e.g var x: A< <Tany>(a: Tany)=>Tany>;
+                    if (node.typeParameters && currentOutput.charAt(currentOutput.length - 1) === "<") {
+                        closeParenthesizedFunctionType = true;
+                        write("(");
                     }
                 }
+                emitTypeParameters(node.typeParameters);
+                write("(");
             }
-            var checkLetConstNames = (ts.isLet(node) || ts.isConst(node));
-            // 1. LexicalDeclaration : LetOrConst BindingList ;
-            // It is a Syntax Error if the BoundNames of BindingList contains "let".
-            // 2. ForDeclaration: ForDeclaration : LetOrConst ForBinding
-            // It is a Syntax Error if the BoundNames of ForDeclaration contains "let".
-            // It is a SyntaxError if a VariableDeclaration or VariableDeclarationNoIn occurs within strict code
-            // and its Identifier is eval or arguments
-            return checkLetConstNames && checkGrammarNameInLetOrConstDeclarations(node.name);
-        }
-        function checkGrammarNameInLetOrConstDeclarations(name) {
-            if (name.kind === 69 /* Identifier */) {
-                if (name.originalKeywordKind === 108 /* LetKeyword */) {
-                    return grammarErrorOnNode(name, ts.Diagnostics.let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations);
-                }
+            // Parameters
+            emitCommaList(node.parameters, emitParameterDeclaration);
+            if (node.kind === 157 /* IndexSignature */) {
+                write("]");
             }
             else {
-                var elements = name.elements;
-                for (var _i = 0, elements_2 = elements; _i < elements_2.length; _i++) {
-                    var element = elements_2[_i];
-                    if (!ts.isOmittedExpression(element)) {
-                        checkGrammarNameInLetOrConstDeclarations(element.name);
-                    }
+                write(")");
+            }
+            // If this is not a constructor and is not private, emit the return type
+            var isFunctionTypeOrConstructorType = node.kind === 160 /* FunctionType */ || node.kind === 161 /* ConstructorType */;
+            if (isFunctionTypeOrConstructorType || node.parent.kind === 163 /* TypeLiteral */) {
+                // Emit type literal signature return type only if specified
+                if (node.type) {
+                    write(isFunctionTypeOrConstructorType ? " => " : ": ");
+                    emitType(node.type);
                 }
             }
-        }
-        function checkGrammarVariableDeclarationList(declarationList) {
-            var declarations = declarationList.declarations;
-            if (checkGrammarForDisallowedTrailingComma(declarationList.declarations)) {
-                return true;
+            else if (node.kind !== 152 /* Constructor */ && !ts.hasModifier(node, 8 /* Private */)) {
+                writeReturnTypeAtSignature(node, getReturnTypeVisibilityError);
             }
-            if (!declarationList.declarations.length) {
-                return grammarErrorAtPos(ts.getSourceFileOfNode(declarationList), declarations.pos, declarations.end - declarations.pos, ts.Diagnostics.Variable_declaration_list_cannot_be_empty);
+            enclosingDeclaration = prevEnclosingDeclaration;
+            if (!isFunctionTypeOrConstructorType) {
+                write(";");
+                writeLine();
             }
-        }
-        function allowLetAndConstDeclarations(parent) {
-            switch (parent.kind) {
-                case 203 /* IfStatement */:
-                case 204 /* DoStatement */:
-                case 205 /* WhileStatement */:
-                case 212 /* WithStatement */:
-                case 206 /* ForStatement */:
-                case 207 /* ForInStatement */:
-                case 208 /* ForOfStatement */:
-                    return false;
-                case 214 /* LabeledStatement */:
-                    return allowLetAndConstDeclarations(parent.parent);
+            else if (closeParenthesizedFunctionType) {
+                write(")");
             }
-            return true;
-        }
-        function checkGrammarForDisallowedLetOrConstStatement(node) {
-            if (!allowLetAndConstDeclarations(node.parent)) {
-                if (ts.isLet(node.declarationList)) {
-                    return grammarErrorOnNode(node, ts.Diagnostics.let_declarations_can_only_be_declared_inside_a_block);
-                }
-                else if (ts.isConst(node.declarationList)) {
-                    return grammarErrorOnNode(node, ts.Diagnostics.const_declarations_can_only_be_declared_inside_a_block);
+            function getReturnTypeVisibilityError(symbolAccessibilityResult) {
+                var diagnosticMessage;
+                switch (node.kind) {
+                    case 156 /* ConstructSignature */:
+                        // Interfaces cannot have return types that cannot be named
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
+                            ts.Diagnostics.Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_0;
+                        break;
+                    case 155 /* CallSignature */:
+                        // Interfaces cannot have return types that cannot be named
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Return_type_of_call_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
+                            ts.Diagnostics.Return_type_of_call_signature_from_exported_interface_has_or_is_using_private_name_0;
+                        break;
+                    case 157 /* IndexSignature */:
+                        // Interfaces cannot have return types that cannot be named
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Return_type_of_index_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
+                            ts.Diagnostics.Return_type_of_index_signature_from_exported_interface_has_or_is_using_private_name_0;
+                        break;
+                    case 151 /* MethodDeclaration */:
+                    case 150 /* MethodSignature */:
+                        if (ts.hasModifier(node, 32 /* Static */)) {
+                            diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                                symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                                    ts.Diagnostics.Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
+                                    ts.Diagnostics.Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
+                                ts.Diagnostics.Return_type_of_public_static_method_from_exported_class_has_or_is_using_private_name_0;
+                        }
+                        else if (node.parent.kind === 229 /* ClassDeclaration */) {
+                            diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                                symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                                    ts.Diagnostics.Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
+                                    ts.Diagnostics.Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
+                                ts.Diagnostics.Return_type_of_public_method_from_exported_class_has_or_is_using_private_name_0;
+                        }
+                        else {
+                            // Interfaces cannot have return types that cannot be named
+                            diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                                ts.Diagnostics.Return_type_of_method_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
+                                ts.Diagnostics.Return_type_of_method_from_exported_interface_has_or_is_using_private_name_0;
+                        }
+                        break;
+                    case 228 /* FunctionDeclaration */:
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                                ts.Diagnostics.Return_type_of_exported_function_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
+                                ts.Diagnostics.Return_type_of_exported_function_has_or_is_using_name_0_from_private_module_1 :
+                            ts.Diagnostics.Return_type_of_exported_function_has_or_is_using_private_name_0;
+                        break;
+                    default:
+                        ts.Debug.fail("This is unknown kind for signature: " + node.kind);
                 }
+                return {
+                    diagnosticMessage: diagnosticMessage,
+                    errorNode: node.name || node
+                };
             }
         }
-        function hasParseDiagnostics(sourceFile) {
-            return sourceFile.parseDiagnostics.length > 0;
-        }
-        function grammarErrorOnFirstToken(node, message, arg0, arg1, arg2) {
-            var sourceFile = ts.getSourceFileOfNode(node);
-            if (!hasParseDiagnostics(sourceFile)) {
-                var span_4 = ts.getSpanOfTokenAtPosition(sourceFile, node.pos);
-                diagnostics.add(ts.createFileDiagnostic(sourceFile, span_4.start, span_4.length, message, arg0, arg1, arg2));
-                return true;
+        function emitParameterDeclaration(node) {
+            increaseIndent();
+            emitJsDocComments(node);
+            if (node.dotDotDotToken) {
+                write("...");
             }
-        }
-        function grammarErrorAtPos(sourceFile, start, length, message, arg0, arg1, arg2) {
-            if (!hasParseDiagnostics(sourceFile)) {
-                diagnostics.add(ts.createFileDiagnostic(sourceFile, start, length, message, arg0, arg1, arg2));
-                return true;
+            if (ts.isBindingPattern(node.name)) {
+                // For bindingPattern, we can't simply writeTextOfNode from the source file
+                // because we want to omit the initializer and using writeTextOfNode will result in initializer get emitted.
+                // Therefore, we will have to recursively emit each element in the bindingPattern.
+                emitBindingPattern(node.name);
             }
-        }
-        function grammarErrorOnNode(node, message, arg0, arg1, arg2) {
-            var sourceFile = ts.getSourceFileOfNode(node);
-            if (!hasParseDiagnostics(sourceFile)) {
-                diagnostics.add(ts.createDiagnosticForNode(node, message, arg0, arg1, arg2));
-                return true;
+            else {
+                writeTextOfNode(currentText, node.name);
             }
-        }
-        function checkGrammarConstructorTypeParameters(node) {
-            if (node.typeParameters) {
-                return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.typeParameters.pos, node.typeParameters.end - node.typeParameters.pos, ts.Diagnostics.Type_parameters_cannot_appear_on_a_constructor_declaration);
+            if (resolver.isOptionalParameter(node)) {
+                write("?");
             }
-        }
-        function checkGrammarConstructorTypeAnnotation(node) {
-            if (node.type) {
-                return grammarErrorOnNode(node.type, ts.Diagnostics.Type_annotation_cannot_appear_on_a_constructor_declaration);
+            decreaseIndent();
+            if (node.parent.kind === 160 /* FunctionType */ ||
+                node.parent.kind === 161 /* ConstructorType */ ||
+                node.parent.parent.kind === 163 /* TypeLiteral */) {
+                emitTypeOfVariableDeclarationFromTypeLiteral(node);
             }
-        }
-        function checkGrammarProperty(node) {
-            if (ts.isClassLike(node.parent)) {
-                if (checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_class_property_declaration_must_directly_refer_to_a_built_in_symbol)) {
-                    return true;
-                }
+            else if (!ts.hasModifier(node.parent, 8 /* Private */)) {
+                writeTypeOfDeclaration(node, node.type, getParameterDeclarationTypeVisibilityError);
             }
-            else if (node.parent.kind === 222 /* InterfaceDeclaration */) {
-                if (checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol)) {
-                    return true;
-                }
-                if (node.initializer) {
-                    return grammarErrorOnNode(node.initializer, ts.Diagnostics.An_interface_property_cannot_have_an_initializer);
+            function getParameterDeclarationTypeVisibilityError(symbolAccessibilityResult) {
+                var diagnosticMessage = getParameterDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult);
+                return diagnosticMessage !== undefined ? {
+                    diagnosticMessage: diagnosticMessage,
+                    errorNode: node,
+                    typeName: node.name
+                } : undefined;
+            }
+            function getParameterDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult) {
+                switch (node.parent.kind) {
+                    case 152 /* Constructor */:
+                        return symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                                ts.Diagnostics.Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                                ts.Diagnostics.Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Parameter_0_of_constructor_from_exported_class_has_or_is_using_private_name_1;
+                    case 156 /* ConstructSignature */:
+                        // Interfaces cannot have parameter types that cannot be named
+                        return symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1;
+                    case 155 /* CallSignature */:
+                        // Interfaces cannot have parameter types that cannot be named
+                        return symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1;
+                    case 157 /* IndexSignature */:
+                        // Interfaces cannot have parameter types that cannot be named
+                        return symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Parameter_0_of_index_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Parameter_0_of_index_signature_from_exported_interface_has_or_is_using_private_name_1;
+                    case 151 /* MethodDeclaration */:
+                    case 150 /* MethodSignature */:
+                        if (ts.hasModifier(node.parent, 32 /* Static */)) {
+                            return symbolAccessibilityResult.errorModuleName ?
+                                symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                                    ts.Diagnostics.Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                                    ts.Diagnostics.Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                                ts.Diagnostics.Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1;
+                        }
+                        else if (node.parent.parent.kind === 229 /* ClassDeclaration */) {
+                            return symbolAccessibilityResult.errorModuleName ?
+                                symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                                    ts.Diagnostics.Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                                    ts.Diagnostics.Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                                ts.Diagnostics.Parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1;
+                        }
+                        else {
+                            // Interfaces cannot have parameter types that cannot be named
+                            return symbolAccessibilityResult.errorModuleName ?
+                                ts.Diagnostics.Parameter_0_of_method_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
+                                ts.Diagnostics.Parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1;
+                        }
+                    case 228 /* FunctionDeclaration */:
+                        return symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                                ts.Diagnostics.Parameter_0_of_exported_function_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                                ts.Diagnostics.Parameter_0_of_exported_function_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Parameter_0_of_exported_function_has_or_is_using_private_name_1;
+                    default:
+                        ts.Debug.fail("This is unknown parent for parameter: " + node.parent.kind);
                 }
             }
-            else if (node.parent.kind === 159 /* TypeLiteral */) {
-                if (checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol)) {
-                    return true;
-                }
-                if (node.initializer) {
-                    return grammarErrorOnNode(node.initializer, ts.Diagnostics.A_type_literal_property_cannot_have_an_initializer);
+            function emitBindingPattern(bindingPattern) {
+                // We have to explicitly emit square bracket and bracket because these tokens are not store inside the node.
+                if (bindingPattern.kind === 174 /* ObjectBindingPattern */) {
+                    write("{");
+                    emitCommaList(bindingPattern.elements, emitBindingElement);
+                    write("}");
                 }
-            }
-            if (ts.isInAmbientContext(node) && node.initializer) {
-                return grammarErrorOnFirstToken(node.initializer, ts.Diagnostics.Initializers_are_not_allowed_in_ambient_contexts);
-            }
-        }
-        function checkGrammarTopLevelElementForRequiredDeclareModifier(node) {
-            // A declare modifier is required for any top level .d.ts declaration except export=, export default, export as namespace
-            // interfaces and imports categories:
-            //
-            //  DeclarationElement:
-            //     ExportAssignment
-            //     export_opt   InterfaceDeclaration
-            //     export_opt   TypeAliasDeclaration
-            //     export_opt   ImportDeclaration
-            //     export_opt   ExternalImportDeclaration
-            //     export_opt   AmbientDeclaration
-            //
-            // TODO: The spec needs to be amended to reflect this grammar.
-            if (node.kind === 222 /* InterfaceDeclaration */ ||
-                node.kind === 223 /* TypeAliasDeclaration */ ||
-                node.kind === 230 /* ImportDeclaration */ ||
-                node.kind === 229 /* ImportEqualsDeclaration */ ||
-                node.kind === 236 /* ExportDeclaration */ ||
-                node.kind === 235 /* ExportAssignment */ ||
-                node.kind === 228 /* NamespaceExportDeclaration */ ||
-                ts.getModifierFlags(node) & (2 /* Ambient */ | 1 /* Export */ | 512 /* Default */)) {
-                return false;
-            }
-            return grammarErrorOnFirstToken(node, ts.Diagnostics.A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file);
-        }
-        function checkGrammarTopLevelElementsForRequiredDeclareModifier(file) {
-            for (var _i = 0, _a = file.statements; _i < _a.length; _i++) {
-                var decl = _a[_i];
-                if (ts.isDeclaration(decl) || decl.kind === 200 /* VariableStatement */) {
-                    if (checkGrammarTopLevelElementForRequiredDeclareModifier(decl)) {
-                        return true;
+                else if (bindingPattern.kind === 175 /* ArrayBindingPattern */) {
+                    write("[");
+                    var elements = bindingPattern.elements;
+                    emitCommaList(elements, emitBindingElement);
+                    if (elements && elements.hasTrailingComma) {
+                        write(", ");
                     }
+                    write("]");
                 }
             }
-        }
-        function checkGrammarSourceFile(node) {
-            return ts.isInAmbientContext(node) && checkGrammarTopLevelElementsForRequiredDeclareModifier(node);
-        }
-        function checkGrammarStatementInAmbientContext(node) {
-            if (ts.isInAmbientContext(node)) {
-                // An accessors is already reported about the ambient context
-                if (isAccessor(node.parent.kind)) {
-                    return getNodeLinks(node).hasReportedStatementInAmbientContext = true;
-                }
-                // Find containing block which is either Block, ModuleBlock, SourceFile
-                var links = getNodeLinks(node);
-                if (!links.hasReportedStatementInAmbientContext && ts.isFunctionLike(node.parent)) {
-                    return getNodeLinks(node).hasReportedStatementInAmbientContext = grammarErrorOnFirstToken(node, ts.Diagnostics.An_implementation_cannot_be_declared_in_ambient_contexts);
+            function emitBindingElement(bindingElement) {
+                if (bindingElement.kind === 200 /* OmittedExpression */) {
+                    // If bindingElement is an omittedExpression (i.e. containing elision),
+                    // we will emit blank space (although this may differ from users' original code,
+                    // it allows emitSeparatedList to write separator appropriately)
+                    // Example:
+                    //      original: function foo([, x, ,]) {}
+                    //      emit    : function foo([ , x,  , ]) {}
+                    write(" ");
                 }
-                // We are either parented by another statement, or some sort of block.
-                // If we're in a block, we only want to really report an error once
-                // to prevent noisiness.  So use a bit on the block to indicate if
-                // this has already been reported, and don't report if it has.
-                //
-                if (node.parent.kind === 199 /* Block */ || node.parent.kind === 226 /* ModuleBlock */ || node.parent.kind === 256 /* SourceFile */) {
-                    var links_1 = getNodeLinks(node.parent);
-                    // Check if the containing block ever report this error
-                    if (!links_1.hasReportedStatementInAmbientContext) {
-                        return links_1.hasReportedStatementInAmbientContext = grammarErrorOnFirstToken(node, ts.Diagnostics.Statements_are_not_allowed_in_ambient_contexts);
+                else if (bindingElement.kind === 176 /* BindingElement */) {
+                    if (bindingElement.propertyName) {
+                        // bindingElement has propertyName property in the following case:
+                        //      { y: [a,b,c] ...} -> bindingPattern will have a property called propertyName for "y"
+                        // We have to explicitly emit the propertyName before descending into its binding elements.
+                        // Example:
+                        //      original: function foo({y: [a,b,c]}) {}
+                        //      emit    : declare function foo({y: [a, b, c]}: { y: [any, any, any] }) void;
+                        writeTextOfNode(currentText, bindingElement.propertyName);
+                        write(": ");
+                    }
+                    if (bindingElement.name) {
+                        if (ts.isBindingPattern(bindingElement.name)) {
+                            // If it is a nested binding pattern, we will recursively descend into each element and emit each one separately.
+                            // In the case of rest element, we will omit rest element.
+                            // Example:
+                            //      original: function foo([a, [[b]], c] = [1,[["string"]], 3]) {}
+                            //      emit    : declare function foo([a, [[b]], c]: [number, [[string]], number]): void;
+                            //      original with rest: function foo([a, ...c]) {}
+                            //      emit              : declare function foo([a, ...c]): void;
+                            emitBindingPattern(bindingElement.name);
+                        }
+                        else {
+                            ts.Debug.assert(bindingElement.name.kind === 71 /* Identifier */);
+                            // If the node is just an identifier, we will simply emit the text associated with the node's name
+                            // Example:
+                            //      original: function foo({y = 10, x}) {}
+                            //      emit    : declare function foo({y, x}: {number, any}): void;
+                            if (bindingElement.dotDotDotToken) {
+                                write("...");
+                            }
+                            writeTextOfNode(currentText, bindingElement.name);
+                        }
                     }
-                }
-                else {
-                }
-            }
-        }
-        function checkGrammarNumericLiteral(node) {
-            // Grammar checking
-            if (node.isOctalLiteral && languageVersion >= 1 /* ES5 */) {
-                return grammarErrorOnNode(node, ts.Diagnostics.Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher);
-            }
-        }
-        function grammarErrorAfterFirstToken(node, message, arg0, arg1, arg2) {
-            var sourceFile = ts.getSourceFileOfNode(node);
-            if (!hasParseDiagnostics(sourceFile)) {
-                var span_5 = ts.getSpanOfTokenAtPosition(sourceFile, node.pos);
-                diagnostics.add(ts.createFileDiagnostic(sourceFile, ts.textSpanEnd(span_5), /*length*/ 0, message, arg0, arg1, arg2));
-                return true;
-            }
-        }
-        function getAmbientModules() {
-            var result = [];
-            for (var sym in globals) {
-                if (ambientModuleSymbolRegex.test(sym)) {
-                    result.push(globals[sym]);
                 }
             }
-            return result;
         }
-    }
-    ts.createTypeChecker = createTypeChecker;
-})(ts || (ts = {}));
-/// <reference path="sys.ts"/>
-/// <reference path="types.ts"/>
-/// <reference path="core.ts"/>
-/// <reference path="diagnosticInformationMap.generated.ts"/>
-/// <reference path="scanner.ts"/>
-var ts;
-(function (ts) {
-    /* @internal */
-    ts.compileOnSaveCommandLineOption = { name: "compileOnSave", type: "boolean" };
-    /* @internal */
-    ts.optionDeclarations = [
-        {
-            name: "charset",
-            type: "string",
-        },
-        ts.compileOnSaveCommandLineOption,
-        {
-            name: "declaration",
-            shortName: "d",
-            type: "boolean",
-            description: ts.Diagnostics.Generates_corresponding_d_ts_file,
-        },
-        {
-            name: "declarationDir",
-            type: "string",
-            isFilePath: true,
-            paramType: ts.Diagnostics.DIRECTORY,
-        },
-        {
-            name: "diagnostics",
-            type: "boolean",
-        },
-        {
-            name: "extendedDiagnostics",
-            type: "boolean",
-            experimental: true
-        },
-        {
-            name: "emitBOM",
-            type: "boolean"
-        },
-        {
-            name: "help",
-            shortName: "h",
-            type: "boolean",
-            description: ts.Diagnostics.Print_this_message,
-        },
-        {
-            name: "help",
-            shortName: "?",
-            type: "boolean"
-        },
-        {
-            name: "init",
-            type: "boolean",
-            description: ts.Diagnostics.Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file,
-        },
-        {
-            name: "inlineSourceMap",
-            type: "boolean",
-        },
-        {
-            name: "inlineSources",
-            type: "boolean",
-        },
-        {
-            name: "jsx",
-            type: ts.createMap({
-                "preserve": 1 /* Preserve */,
-                "react": 2 /* React */
-            }),
-            paramType: ts.Diagnostics.KIND,
-            description: ts.Diagnostics.Specify_JSX_code_generation_Colon_preserve_or_react,
-        },
-        {
-            name: "reactNamespace",
-            type: "string",
-            description: ts.Diagnostics.Specify_the_object_invoked_for_createElement_and_spread_when_targeting_react_JSX_emit
-        },
-        {
-            name: "listFiles",
-            type: "boolean",
-        },
-        {
-            name: "locale",
-            type: "string",
-        },
-        {
-            name: "mapRoot",
-            type: "string",
-            isFilePath: true,
-            description: ts.Diagnostics.Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations,
-            paramType: ts.Diagnostics.LOCATION,
-        },
-        {
-            name: "module",
-            shortName: "m",
-            type: ts.createMap({
-                "none": ts.ModuleKind.None,
-                "commonjs": ts.ModuleKind.CommonJS,
-                "amd": ts.ModuleKind.AMD,
-                "system": ts.ModuleKind.System,
-                "umd": ts.ModuleKind.UMD,
-                "es6": ts.ModuleKind.ES6,
-                "es2015": ts.ModuleKind.ES2015,
-            }),
-            description: ts.Diagnostics.Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015,
-            paramType: ts.Diagnostics.KIND,
-        },
-        {
-            name: "newLine",
-            type: ts.createMap({
-                "crlf": 0 /* CarriageReturnLineFeed */,
-                "lf": 1 /* LineFeed */
-            }),
-            description: ts.Diagnostics.Specify_the_end_of_line_sequence_to_be_used_when_emitting_files_Colon_CRLF_dos_or_LF_unix,
-            paramType: ts.Diagnostics.NEWLINE,
-        },
-        {
-            name: "noEmit",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_emit_outputs,
-        },
-        {
-            name: "noEmitHelpers",
-            type: "boolean"
-        },
-        {
-            name: "noEmitOnError",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_emit_outputs_if_any_errors_were_reported,
-        },
-        {
-            name: "noErrorTruncation",
-            type: "boolean"
-        },
-        {
-            name: "noImplicitAny",
-            type: "boolean",
-            description: ts.Diagnostics.Raise_error_on_expressions_and_declarations_with_an_implied_any_type,
-        },
-        {
-            name: "noImplicitThis",
-            type: "boolean",
-            description: ts.Diagnostics.Raise_error_on_this_expressions_with_an_implied_any_type,
-        },
-        {
-            name: "noUnusedLocals",
-            type: "boolean",
-            description: ts.Diagnostics.Report_errors_on_unused_locals,
-        },
-        {
-            name: "noUnusedParameters",
-            type: "boolean",
-            description: ts.Diagnostics.Report_errors_on_unused_parameters,
-        },
-        {
-            name: "noLib",
-            type: "boolean",
-        },
-        {
-            name: "noResolve",
-            type: "boolean",
-        },
-        {
-            name: "skipDefaultLibCheck",
-            type: "boolean",
-        },
-        {
-            name: "skipLibCheck",
-            type: "boolean",
-            description: ts.Diagnostics.Skip_type_checking_of_declaration_files,
-        },
-        {
-            name: "out",
-            type: "string",
-            isFilePath: false,
-            // for correct behaviour, please use outFile
-            paramType: ts.Diagnostics.FILE,
-        },
-        {
-            name: "outFile",
-            type: "string",
-            isFilePath: true,
-            description: ts.Diagnostics.Concatenate_and_emit_output_to_single_file,
-            paramType: ts.Diagnostics.FILE,
-        },
-        {
-            name: "outDir",
-            type: "string",
-            isFilePath: true,
-            description: ts.Diagnostics.Redirect_output_structure_to_the_directory,
-            paramType: ts.Diagnostics.DIRECTORY,
-        },
-        {
-            name: "preserveConstEnums",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_erase_const_enum_declarations_in_generated_code
-        },
-        {
-            name: "pretty",
-            description: ts.Diagnostics.Stylize_errors_and_messages_using_color_and_context_experimental,
-            type: "boolean"
-        },
-        {
-            name: "project",
-            shortName: "p",
-            type: "string",
-            isFilePath: true,
-            description: ts.Diagnostics.Compile_the_project_in_the_given_directory,
-            paramType: ts.Diagnostics.DIRECTORY
-        },
-        {
-            name: "removeComments",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_emit_comments_to_output,
-        },
-        {
-            name: "rootDir",
-            type: "string",
-            isFilePath: true,
-            paramType: ts.Diagnostics.LOCATION,
-            description: ts.Diagnostics.Specify_the_root_directory_of_input_files_Use_to_control_the_output_directory_structure_with_outDir,
-        },
-        {
-            name: "isolatedModules",
-            type: "boolean",
-        },
-        {
-            name: "sourceMap",
-            type: "boolean",
-            description: ts.Diagnostics.Generates_corresponding_map_file,
-        },
-        {
-            name: "sourceRoot",
-            type: "string",
-            isFilePath: true,
-            description: ts.Diagnostics.Specify_the_location_where_debugger_should_locate_TypeScript_files_instead_of_source_locations,
-            paramType: ts.Diagnostics.LOCATION,
-        },
-        {
-            name: "suppressExcessPropertyErrors",
-            type: "boolean",
-            description: ts.Diagnostics.Suppress_excess_property_checks_for_object_literals,
-            experimental: true
-        },
-        {
-            name: "suppressImplicitAnyIndexErrors",
-            type: "boolean",
-            description: ts.Diagnostics.Suppress_noImplicitAny_errors_for_indexing_objects_lacking_index_signatures,
-        },
-        {
-            name: "stripInternal",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_emit_declarations_for_code_that_has_an_internal_annotation,
-            experimental: true
-        },
-        {
-            name: "target",
-            shortName: "t",
-            type: ts.createMap({
-                "es3": 0 /* ES3 */,
-                "es5": 1 /* ES5 */,
-                "es6": 2 /* ES6 */,
-                "es2015": 2 /* ES2015 */,
-            }),
-            description: ts.Diagnostics.Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015,
-            paramType: ts.Diagnostics.VERSION,
-        },
-        {
-            name: "version",
-            shortName: "v",
-            type: "boolean",
-            description: ts.Diagnostics.Print_the_compiler_s_version,
-        },
-        {
-            name: "watch",
-            shortName: "w",
-            type: "boolean",
-            description: ts.Diagnostics.Watch_input_files,
-        },
-        {
-            name: "experimentalDecorators",
-            type: "boolean",
-            description: ts.Diagnostics.Enables_experimental_support_for_ES7_decorators
-        },
-        {
-            name: "emitDecoratorMetadata",
-            type: "boolean",
-            experimental: true,
-            description: ts.Diagnostics.Enables_experimental_support_for_emitting_type_metadata_for_decorators
-        },
-        {
-            name: "moduleResolution",
-            type: ts.createMap({
-                "node": ts.ModuleResolutionKind.NodeJs,
-                "classic": ts.ModuleResolutionKind.Classic,
-            }),
-            description: ts.Diagnostics.Specify_module_resolution_strategy_Colon_node_Node_js_or_classic_TypeScript_pre_1_6,
-            paramType: ts.Diagnostics.STRATEGY,
-        },
-        {
-            name: "allowUnusedLabels",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_report_errors_on_unused_labels
-        },
-        {
-            name: "noImplicitReturns",
-            type: "boolean",
-            description: ts.Diagnostics.Report_error_when_not_all_code_paths_in_function_return_a_value
-        },
-        {
-            name: "noFallthroughCasesInSwitch",
-            type: "boolean",
-            description: ts.Diagnostics.Report_errors_for_fallthrough_cases_in_switch_statement
-        },
-        {
-            name: "allowUnreachableCode",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_report_errors_on_unreachable_code
-        },
-        {
-            name: "forceConsistentCasingInFileNames",
-            type: "boolean",
-            description: ts.Diagnostics.Disallow_inconsistently_cased_references_to_the_same_file
-        },
-        {
-            name: "baseUrl",
-            type: "string",
-            isFilePath: true,
-            description: ts.Diagnostics.Base_directory_to_resolve_non_absolute_module_names
-        },
-        {
-            // this option can only be specified in tsconfig.json
-            // use type = object to copy the value as-is
-            name: "paths",
-            type: "object",
-            isTSConfigOnly: true
-        },
-        {
-            // this option can only be specified in tsconfig.json
-            // use type = object to copy the value as-is
-            name: "rootDirs",
-            type: "list",
-            isTSConfigOnly: true,
-            element: {
-                name: "rootDirs",
-                type: "string",
-                isFilePath: true
-            }
-        },
-        {
-            name: "typeRoots",
-            type: "list",
-            element: {
-                name: "typeRoots",
-                type: "string",
-                isFilePath: true
+        function emitNode(node) {
+            switch (node.kind) {
+                case 228 /* FunctionDeclaration */:
+                case 233 /* ModuleDeclaration */:
+                case 237 /* ImportEqualsDeclaration */:
+                case 230 /* InterfaceDeclaration */:
+                case 229 /* ClassDeclaration */:
+                case 231 /* TypeAliasDeclaration */:
+                case 232 /* EnumDeclaration */:
+                    return emitModuleElement(node, isModuleElementVisible(node));
+                case 208 /* VariableStatement */:
+                    return emitModuleElement(node, isVariableStatementVisible(node));
+                case 238 /* ImportDeclaration */:
+                    // Import declaration without import clause is visible, otherwise it is not visible
+                    return emitModuleElement(node, /*isModuleElementVisible*/ !node.importClause);
+                case 244 /* ExportDeclaration */:
+                    return emitExportDeclaration(node);
+                case 152 /* Constructor */:
+                case 151 /* MethodDeclaration */:
+                case 150 /* MethodSignature */:
+                    return writeFunctionDeclaration(node);
+                case 156 /* ConstructSignature */:
+                case 155 /* CallSignature */:
+                case 157 /* IndexSignature */:
+                    return emitSignatureDeclarationWithJsDocComments(node);
+                case 153 /* GetAccessor */:
+                case 154 /* SetAccessor */:
+                    return emitAccessorDeclaration(node);
+                case 149 /* PropertyDeclaration */:
+                case 148 /* PropertySignature */:
+                    return emitPropertyDeclaration(node);
+                case 264 /* EnumMember */:
+                    return emitEnumMemberDeclaration(node);
+                case 243 /* ExportAssignment */:
+                    return emitExportAssignment(node);
+                case 265 /* SourceFile */:
+                    return emitSourceFile(node);
             }
-        },
-        {
-            name: "types",
-            type: "list",
-            element: {
-                name: "types",
-                type: "string"
-            },
-            description: ts.Diagnostics.Type_declaration_files_to_be_included_in_compilation
-        },
-        {
-            name: "traceResolution",
-            type: "boolean",
-            description: ts.Diagnostics.Enable_tracing_of_the_name_resolution_process
-        },
-        {
-            name: "allowJs",
-            type: "boolean",
-            description: ts.Diagnostics.Allow_javascript_files_to_be_compiled
-        },
-        {
-            name: "allowSyntheticDefaultImports",
-            type: "boolean",
-            description: ts.Diagnostics.Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typechecking
-        },
-        {
-            name: "noImplicitUseStrict",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_emit_use_strict_directives_in_module_output
-        },
-        {
-            name: "maxNodeModuleJsDepth",
-            type: "number",
-            description: ts.Diagnostics.The_maximum_dependency_depth_to_search_under_node_modules_and_load_JavaScript_files
-        },
-        {
-            name: "listEmittedFiles",
-            type: "boolean"
-        },
-        {
-            name: "lib",
-            type: "list",
-            element: {
-                name: "lib",
-                type: ts.createMap({
-                    // JavaScript only
-                    "es5": "lib.es5.d.ts",
-                    "es6": "lib.es2015.d.ts",
-                    "es2015": "lib.es2015.d.ts",
-                    "es7": "lib.es2016.d.ts",
-                    "es2016": "lib.es2016.d.ts",
-                    "es2017": "lib.es2017.d.ts",
-                    // Host only
-                    "dom": "lib.dom.d.ts",
-                    "dom.iterable": "lib.dom.iterable.d.ts",
-                    "webworker": "lib.webworker.d.ts",
-                    "scripthost": "lib.scripthost.d.ts",
-                    // ES2015 Or ESNext By-feature options
-                    "es2015.core": "lib.es2015.core.d.ts",
-                    "es2015.collection": "lib.es2015.collection.d.ts",
-                    "es2015.generator": "lib.es2015.generator.d.ts",
-                    "es2015.iterable": "lib.es2015.iterable.d.ts",
-                    "es2015.promise": "lib.es2015.promise.d.ts",
-                    "es2015.proxy": "lib.es2015.proxy.d.ts",
-                    "es2015.reflect": "lib.es2015.reflect.d.ts",
-                    "es2015.symbol": "lib.es2015.symbol.d.ts",
-                    "es2015.symbol.wellknown": "lib.es2015.symbol.wellknown.d.ts",
-                    "es2016.array.include": "lib.es2016.array.include.d.ts",
-                    "es2017.object": "lib.es2017.object.d.ts",
-                    "es2017.sharedmemory": "lib.es2017.sharedmemory.d.ts"
-                }),
-            },
-            description: ts.Diagnostics.Specify_library_files_to_be_included_in_the_compilation_Colon
-        },
-        {
-            name: "disableSizeLimit",
-            type: "boolean"
-        },
-        {
-            name: "strictNullChecks",
-            type: "boolean",
-            description: ts.Diagnostics.Enable_strict_null_checks
-        },
-        {
-            name: "importHelpers",
-            type: "boolean",
-            description: ts.Diagnostics.Import_emit_helpers_from_tslib
         }
-    ];
-    /* @internal */
-    ts.typingOptionDeclarations = [
-        {
-            name: "enableAutoDiscovery",
-            type: "boolean",
-        },
-        {
-            name: "include",
-            type: "list",
-            element: {
-                name: "include",
-                type: "string"
+        /**
+         * Adds the reference to referenced file, returns true if global file reference was emitted
+         * @param referencedFile
+         * @param addBundledFileReference Determines if global file reference corresponding to bundled file should be emitted or not
+         */
+        function writeReferencePath(referencedFile, addBundledFileReference, emitOnlyDtsFiles) {
+            var declFileName;
+            var addedBundledEmitReference = false;
+            if (referencedFile.isDeclarationFile) {
+                // Declaration file, use declaration file name
+                declFileName = referencedFile.fileName;
             }
-        },
-        {
-            name: "exclude",
-            type: "list",
-            element: {
-                name: "exclude",
-                type: "string"
+            else {
+                // Get the declaration file path
+                ts.forEachEmittedFile(host, getDeclFileName, referencedFile, emitOnlyDtsFiles);
+            }
+            if (declFileName) {
+                declFileName = ts.getRelativePathToDirectoryOrUrl(ts.getDirectoryPath(ts.normalizeSlashes(declarationFilePath)), declFileName, host.getCurrentDirectory(), host.getCanonicalFileName, 
+                /*isAbsolutePathAnUrl*/ false);
+                referencesOutput += "/// <reference path=\"" + declFileName + "\" />" + newLine;
+            }
+            return addedBundledEmitReference;
+            function getDeclFileName(emitFileNames, sourceFileOrBundle) {
+                // Dont add reference path to this file if it is a bundled emit and caller asked not emit bundled file path
+                var isBundledEmit = sourceFileOrBundle.kind === 266 /* Bundle */;
+                if (isBundledEmit && !addBundledFileReference) {
+                    return;
+                }
+                ts.Debug.assert(!!emitFileNames.declarationFilePath || ts.isSourceFileJavaScript(referencedFile), "Declaration file is not present only for javascript files");
+                declFileName = emitFileNames.declarationFilePath || emitFileNames.jsFilePath;
+                addedBundledEmitReference = isBundledEmit;
             }
         }
-    ];
+    }
     /* @internal */
-    ts.defaultInitCompilerOptions = {
-        module: ts.ModuleKind.CommonJS,
-        target: 1 /* ES5 */,
-        noImplicitAny: false,
-        sourceMap: false,
-    };
-    var optionNameMapCache;
+    function writeDeclarationFile(declarationFilePath, sourceFileOrBundle, host, resolver, emitterDiagnostics, emitOnlyDtsFiles) {
+        var emitDeclarationResult = emitDeclarations(host, resolver, emitterDiagnostics, declarationFilePath, sourceFileOrBundle, emitOnlyDtsFiles);
+        var emitSkipped = emitDeclarationResult.reportedDeclarationError || host.isEmitBlocked(declarationFilePath) || host.getCompilerOptions().noEmit;
+        if (!emitSkipped) {
+            var sourceFiles = sourceFileOrBundle.kind === 266 /* Bundle */ ? sourceFileOrBundle.sourceFiles : [sourceFileOrBundle];
+            var declarationOutput = emitDeclarationResult.referencesOutput
+                + getDeclarationOutput(emitDeclarationResult.synchronousDeclarationOutput, emitDeclarationResult.moduleElementDeclarationEmitInfo);
+            ts.writeFile(host, emitterDiagnostics, declarationFilePath, declarationOutput, host.getCompilerOptions().emitBOM, sourceFiles);
+        }
+        return emitSkipped;
+        function getDeclarationOutput(synchronousDeclarationOutput, moduleElementDeclarationEmitInfo) {
+            var appliedSyncOutputPos = 0;
+            var declarationOutput = "";
+            // apply asynchronous additions to the synchronous output
+            ts.forEach(moduleElementDeclarationEmitInfo, function (aliasEmitInfo) {
+                if (aliasEmitInfo.asynchronousOutput) {
+                    declarationOutput += synchronousDeclarationOutput.substring(appliedSyncOutputPos, aliasEmitInfo.outputPos);
+                    declarationOutput += getDeclarationOutput(aliasEmitInfo.asynchronousOutput, aliasEmitInfo.subModuleElementDeclarationEmitInfo);
+                    appliedSyncOutputPos = aliasEmitInfo.outputPos;
+                }
+            });
+            declarationOutput += synchronousDeclarationOutput.substring(appliedSyncOutputPos);
+            return declarationOutput;
+        }
+    }
+    ts.writeDeclarationFile = writeDeclarationFile;
+})(ts || (ts = {}));
+/// <reference path="core.ts"/>
+/// <reference path="utilities.ts"/>
+var ts;
+(function (ts) {
+    function createSynthesizedNode(kind) {
+        var node = ts.createNode(kind, -1, -1);
+        node.flags |= 8 /* Synthesized */;
+        return node;
+    }
     /* @internal */
-    function getOptionNameMap() {
-        if (optionNameMapCache) {
-            return optionNameMapCache;
+    function updateNode(updated, original) {
+        if (updated !== original) {
+            setOriginalNode(updated, original);
+            setTextRange(updated, original);
+            if (original.startsOnNewLine) {
+                updated.startsOnNewLine = true;
+            }
+            ts.aggregateTransformFlags(updated);
         }
-        var optionNameMap = ts.createMap();
-        var shortOptionNames = ts.createMap();
-        ts.forEach(ts.optionDeclarations, function (option) {
-            optionNameMap[option.name.toLowerCase()] = option;
-            if (option.shortName) {
-                shortOptionNames[option.shortName] = option.name;
+        return updated;
+    }
+    ts.updateNode = updateNode;
+    /**
+     * Make `elements` into a `NodeArray<T>`. If `elements` is `undefined`, returns an empty `NodeArray<T>`.
+     */
+    function createNodeArray(elements, hasTrailingComma) {
+        if (elements) {
+            if (ts.isNodeArray(elements)) {
+                return elements;
             }
-        });
-        optionNameMapCache = { optionNameMap: optionNameMap, shortOptionNames: shortOptionNames };
-        return optionNameMapCache;
+        }
+        else {
+            elements = [];
+        }
+        var array = elements;
+        array.pos = -1;
+        array.end = -1;
+        array.hasTrailingComma = hasTrailingComma;
+        return array;
+    }
+    ts.createNodeArray = createNodeArray;
+    /**
+     * Creates a shallow, memberwise clone of a node with no source map location.
+     */
+    /* @internal */
+    function getSynthesizedClone(node) {
+        // We don't use "clone" from core.ts here, as we need to preserve the prototype chain of
+        // the original node. We also need to exclude specific properties and only include own-
+        // properties (to skip members already defined on the shared prototype).
+        var clone = createSynthesizedNode(node.kind);
+        clone.flags |= node.flags;
+        setOriginalNode(clone, node);
+        for (var key in node) {
+            if (clone.hasOwnProperty(key) || !node.hasOwnProperty(key)) {
+                continue;
+            }
+            clone[key] = node[key];
+        }
+        return clone;
+    }
+    ts.getSynthesizedClone = getSynthesizedClone;
+    function createLiteral(value) {
+        if (typeof value === "number") {
+            return createNumericLiteral(value + "");
+        }
+        if (typeof value === "boolean") {
+            return value ? createTrue() : createFalse();
+        }
+        if (typeof value === "string") {
+            return createStringLiteral(value);
+        }
+        return createLiteralFromNode(value);
+    }
+    ts.createLiteral = createLiteral;
+    function createNumericLiteral(value) {
+        var node = createSynthesizedNode(8 /* NumericLiteral */);
+        node.text = value;
+        node.numericLiteralFlags = 0;
+        return node;
+    }
+    ts.createNumericLiteral = createNumericLiteral;
+    function createStringLiteral(text) {
+        var node = createSynthesizedNode(9 /* StringLiteral */);
+        node.text = text;
+        return node;
+    }
+    function createLiteralFromNode(sourceNode) {
+        var node = createStringLiteral(sourceNode.text);
+        node.textSourceNode = sourceNode;
+        return node;
+    }
+    function createIdentifier(text, typeArguments) {
+        var node = createSynthesizedNode(71 /* Identifier */);
+        node.text = ts.escapeIdentifier(text);
+        node.originalKeywordKind = text ? ts.stringToToken(text) : 0 /* Unknown */;
+        node.autoGenerateKind = 0 /* None */;
+        node.autoGenerateId = 0;
+        if (typeArguments) {
+            node.typeArguments = createNodeArray(typeArguments);
+        }
+        return node;
+    }
+    ts.createIdentifier = createIdentifier;
+    function updateIdentifier(node, typeArguments) {
+        return node.typeArguments !== typeArguments
+            ? updateNode(createIdentifier(node.text, typeArguments), node)
+            : node;
+    }
+    ts.updateIdentifier = updateIdentifier;
+    var nextAutoGenerateId = 0;
+    /** Create a unique temporary variable. */
+    function createTempVariable(recordTempVariable) {
+        var name = createIdentifier("");
+        name.autoGenerateKind = 1 /* Auto */;
+        name.autoGenerateId = nextAutoGenerateId;
+        nextAutoGenerateId++;
+        if (recordTempVariable) {
+            recordTempVariable(name);
+        }
+        return name;
+    }
+    ts.createTempVariable = createTempVariable;
+    /** Create a unique temporary variable for use in a loop. */
+    function createLoopVariable() {
+        var name = createIdentifier("");
+        name.autoGenerateKind = 2 /* Loop */;
+        name.autoGenerateId = nextAutoGenerateId;
+        nextAutoGenerateId++;
+        return name;
+    }
+    ts.createLoopVariable = createLoopVariable;
+    /** Create a unique name based on the supplied text. */
+    function createUniqueName(text) {
+        var name = createIdentifier(text);
+        name.autoGenerateKind = 3 /* Unique */;
+        name.autoGenerateId = nextAutoGenerateId;
+        nextAutoGenerateId++;
+        return name;
+    }
+    ts.createUniqueName = createUniqueName;
+    /** Create a unique name generated for a node. */
+    function getGeneratedNameForNode(node) {
+        var name = createIdentifier("");
+        name.autoGenerateKind = 4 /* Node */;
+        name.autoGenerateId = nextAutoGenerateId;
+        name.original = node;
+        nextAutoGenerateId++;
+        return name;
+    }
+    ts.getGeneratedNameForNode = getGeneratedNameForNode;
+    // Punctuation
+    function createToken(token) {
+        return createSynthesizedNode(token);
+    }
+    ts.createToken = createToken;
+    // Reserved words
+    function createSuper() {
+        return createSynthesizedNode(97 /* SuperKeyword */);
+    }
+    ts.createSuper = createSuper;
+    function createThis() {
+        return createSynthesizedNode(99 /* ThisKeyword */);
+    }
+    ts.createThis = createThis;
+    function createNull() {
+        return createSynthesizedNode(95 /* NullKeyword */);
+    }
+    ts.createNull = createNull;
+    function createTrue() {
+        return createSynthesizedNode(101 /* TrueKeyword */);
+    }
+    ts.createTrue = createTrue;
+    function createFalse() {
+        return createSynthesizedNode(86 /* FalseKeyword */);
+    }
+    ts.createFalse = createFalse;
+    // Names
+    function createQualifiedName(left, right) {
+        var node = createSynthesizedNode(143 /* QualifiedName */);
+        node.left = left;
+        node.right = asName(right);
+        return node;
+    }
+    ts.createQualifiedName = createQualifiedName;
+    function updateQualifiedName(node, left, right) {
+        return node.left !== left
+            || node.right !== right
+            ? updateNode(createQualifiedName(left, right), node)
+            : node;
+    }
+    ts.updateQualifiedName = updateQualifiedName;
+    function createComputedPropertyName(expression) {
+        var node = createSynthesizedNode(144 /* ComputedPropertyName */);
+        node.expression = expression;
+        return node;
+    }
+    ts.createComputedPropertyName = createComputedPropertyName;
+    function updateComputedPropertyName(node, expression) {
+        return node.expression !== expression
+            ? updateNode(createComputedPropertyName(expression), node)
+            : node;
+    }
+    ts.updateComputedPropertyName = updateComputedPropertyName;
+    // Signature elements
+    function createTypeParameterDeclaration(name, constraint, defaultType) {
+        var node = createSynthesizedNode(145 /* TypeParameter */);
+        node.name = asName(name);
+        node.constraint = constraint;
+        node.default = defaultType;
+        return node;
+    }
+    ts.createTypeParameterDeclaration = createTypeParameterDeclaration;
+    function updateTypeParameterDeclaration(node, name, constraint, defaultType) {
+        return node.name !== name
+            || node.constraint !== constraint
+            || node.default !== defaultType
+            ? updateNode(createTypeParameterDeclaration(name, constraint, defaultType), node)
+            : node;
+    }
+    ts.updateTypeParameterDeclaration = updateTypeParameterDeclaration;
+    function createParameter(decorators, modifiers, dotDotDotToken, name, questionToken, type, initializer) {
+        var node = createSynthesizedNode(146 /* Parameter */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.dotDotDotToken = dotDotDotToken;
+        node.name = asName(name);
+        node.questionToken = questionToken;
+        node.type = type;
+        node.initializer = initializer ? ts.parenthesizeExpressionForList(initializer) : undefined;
+        return node;
+    }
+    ts.createParameter = createParameter;
+    function updateParameter(node, decorators, modifiers, dotDotDotToken, name, questionToken, type, initializer) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.dotDotDotToken !== dotDotDotToken
+            || node.name !== name
+            || node.questionToken !== questionToken
+            || node.type !== type
+            || node.initializer !== initializer
+            ? updateNode(createParameter(decorators, modifiers, dotDotDotToken, name, node.questionToken, type, initializer), node)
+            : node;
+    }
+    ts.updateParameter = updateParameter;
+    function createDecorator(expression) {
+        var node = createSynthesizedNode(147 /* Decorator */);
+        node.expression = ts.parenthesizeForAccess(expression);
+        return node;
+    }
+    ts.createDecorator = createDecorator;
+    function updateDecorator(node, expression) {
+        return node.expression !== expression
+            ? updateNode(createDecorator(expression), node)
+            : node;
+    }
+    ts.updateDecorator = updateDecorator;
+    // Type Elements
+    function createPropertySignature(modifiers, name, questionToken, type, initializer) {
+        var node = createSynthesizedNode(148 /* PropertySignature */);
+        node.modifiers = asNodeArray(modifiers);
+        node.name = asName(name);
+        node.questionToken = questionToken;
+        node.type = type;
+        node.initializer = initializer;
+        return node;
+    }
+    ts.createPropertySignature = createPropertySignature;
+    function updatePropertySignature(node, modifiers, name, questionToken, type, initializer) {
+        return node.modifiers !== modifiers
+            || node.name !== name
+            || node.questionToken !== questionToken
+            || node.type !== type
+            || node.initializer !== initializer
+            ? updateNode(createPropertySignature(modifiers, name, questionToken, type, initializer), node)
+            : node;
+    }
+    ts.updatePropertySignature = updatePropertySignature;
+    function createProperty(decorators, modifiers, name, questionToken, type, initializer) {
+        var node = createSynthesizedNode(149 /* PropertyDeclaration */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.name = asName(name);
+        node.questionToken = questionToken;
+        node.type = type;
+        node.initializer = initializer;
+        return node;
+    }
+    ts.createProperty = createProperty;
+    function updateProperty(node, decorators, modifiers, name, type, initializer) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.name !== name
+            || node.type !== type
+            || node.initializer !== initializer
+            ? updateNode(createProperty(decorators, modifiers, name, node.questionToken, type, initializer), node)
+            : node;
+    }
+    ts.updateProperty = updateProperty;
+    function createMethodSignature(typeParameters, parameters, type, name, questionToken) {
+        var node = createSignatureDeclaration(150 /* MethodSignature */, typeParameters, parameters, type);
+        node.name = asName(name);
+        node.questionToken = questionToken;
+        return node;
+    }
+    ts.createMethodSignature = createMethodSignature;
+    function updateMethodSignature(node, typeParameters, parameters, type, name, questionToken) {
+        return node.typeParameters !== typeParameters
+            || node.parameters !== parameters
+            || node.type !== type
+            || node.name !== name
+            || node.questionToken !== questionToken
+            ? updateNode(createMethodSignature(typeParameters, parameters, type, name, questionToken), node)
+            : node;
+    }
+    ts.updateMethodSignature = updateMethodSignature;
+    function createMethod(decorators, modifiers, asteriskToken, name, questionToken, typeParameters, parameters, type, body) {
+        var node = createSynthesizedNode(151 /* MethodDeclaration */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.asteriskToken = asteriskToken;
+        node.name = asName(name);
+        node.questionToken = questionToken;
+        node.typeParameters = asNodeArray(typeParameters);
+        node.parameters = createNodeArray(parameters);
+        node.type = type;
+        node.body = body;
+        return node;
+    }
+    ts.createMethod = createMethod;
+    function updateMethod(node, decorators, modifiers, asteriskToken, name, questionToken, typeParameters, parameters, type, body) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.asteriskToken !== asteriskToken
+            || node.name !== name
+            || node.typeParameters !== typeParameters
+            || node.parameters !== parameters
+            || node.type !== type
+            || node.body !== body
+            ? updateNode(createMethod(decorators, modifiers, asteriskToken, name, questionToken, typeParameters, parameters, type, body), node)
+            : node;
+    }
+    ts.updateMethod = updateMethod;
+    function createConstructor(decorators, modifiers, parameters, body) {
+        var node = createSynthesizedNode(152 /* Constructor */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.typeParameters = undefined;
+        node.parameters = createNodeArray(parameters);
+        node.type = undefined;
+        node.body = body;
+        return node;
+    }
+    ts.createConstructor = createConstructor;
+    function updateConstructor(node, decorators, modifiers, parameters, body) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.parameters !== parameters
+            || node.body !== body
+            ? updateNode(createConstructor(decorators, modifiers, parameters, body), node)
+            : node;
+    }
+    ts.updateConstructor = updateConstructor;
+    function createGetAccessor(decorators, modifiers, name, parameters, type, body) {
+        var node = createSynthesizedNode(153 /* GetAccessor */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.name = asName(name);
+        node.typeParameters = undefined;
+        node.parameters = createNodeArray(parameters);
+        node.type = type;
+        node.body = body;
+        return node;
+    }
+    ts.createGetAccessor = createGetAccessor;
+    function updateGetAccessor(node, decorators, modifiers, name, parameters, type, body) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.name !== name
+            || node.parameters !== parameters
+            || node.type !== type
+            || node.body !== body
+            ? updateNode(createGetAccessor(decorators, modifiers, name, parameters, type, body), node)
+            : node;
+    }
+    ts.updateGetAccessor = updateGetAccessor;
+    function createSetAccessor(decorators, modifiers, name, parameters, body) {
+        var node = createSynthesizedNode(154 /* SetAccessor */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.name = asName(name);
+        node.typeParameters = undefined;
+        node.parameters = createNodeArray(parameters);
+        node.body = body;
+        return node;
+    }
+    ts.createSetAccessor = createSetAccessor;
+    function updateSetAccessor(node, decorators, modifiers, name, parameters, body) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.name !== name
+            || node.parameters !== parameters
+            || node.body !== body
+            ? updateNode(createSetAccessor(decorators, modifiers, name, parameters, body), node)
+            : node;
+    }
+    ts.updateSetAccessor = updateSetAccessor;
+    function createCallSignature(typeParameters, parameters, type) {
+        return createSignatureDeclaration(155 /* CallSignature */, typeParameters, parameters, type);
+    }
+    ts.createCallSignature = createCallSignature;
+    function updateCallSignature(node, typeParameters, parameters, type) {
+        return updateSignatureDeclaration(node, typeParameters, parameters, type);
+    }
+    ts.updateCallSignature = updateCallSignature;
+    function createConstructSignature(typeParameters, parameters, type) {
+        return createSignatureDeclaration(156 /* ConstructSignature */, typeParameters, parameters, type);
+    }
+    ts.createConstructSignature = createConstructSignature;
+    function updateConstructSignature(node, typeParameters, parameters, type) {
+        return updateSignatureDeclaration(node, typeParameters, parameters, type);
+    }
+    ts.updateConstructSignature = updateConstructSignature;
+    function createIndexSignature(decorators, modifiers, parameters, type) {
+        var node = createSynthesizedNode(157 /* IndexSignature */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.parameters = createNodeArray(parameters);
+        node.type = type;
+        return node;
+    }
+    ts.createIndexSignature = createIndexSignature;
+    function updateIndexSignature(node, decorators, modifiers, parameters, type) {
+        return node.parameters !== parameters
+            || node.type !== type
+            || node.decorators !== decorators
+            || node.modifiers !== modifiers
+            ? updateNode(createIndexSignature(decorators, modifiers, parameters, type), node)
+            : node;
+    }
+    ts.updateIndexSignature = updateIndexSignature;
+    /* @internal */
+    function createSignatureDeclaration(kind, typeParameters, parameters, type) {
+        var node = createSynthesizedNode(kind);
+        node.typeParameters = asNodeArray(typeParameters);
+        node.parameters = asNodeArray(parameters);
+        node.type = type;
+        return node;
+    }
+    ts.createSignatureDeclaration = createSignatureDeclaration;
+    function updateSignatureDeclaration(node, typeParameters, parameters, type) {
+        return node.typeParameters !== typeParameters
+            || node.parameters !== parameters
+            || node.type !== type
+            ? updateNode(createSignatureDeclaration(node.kind, typeParameters, parameters, type), node)
+            : node;
+    }
+    // Types
+    function createKeywordTypeNode(kind) {
+        return createSynthesizedNode(kind);
+    }
+    ts.createKeywordTypeNode = createKeywordTypeNode;
+    function createTypePredicateNode(parameterName, type) {
+        var node = createSynthesizedNode(158 /* TypePredicate */);
+        node.parameterName = asName(parameterName);
+        node.type = type;
+        return node;
+    }
+    ts.createTypePredicateNode = createTypePredicateNode;
+    function updateTypePredicateNode(node, parameterName, type) {
+        return node.parameterName !== parameterName
+            || node.type !== type
+            ? updateNode(createTypePredicateNode(parameterName, type), node)
+            : node;
+    }
+    ts.updateTypePredicateNode = updateTypePredicateNode;
+    function createTypeReferenceNode(typeName, typeArguments) {
+        var node = createSynthesizedNode(159 /* TypeReference */);
+        node.typeName = asName(typeName);
+        node.typeArguments = typeArguments && ts.parenthesizeTypeParameters(typeArguments);
+        return node;
+    }
+    ts.createTypeReferenceNode = createTypeReferenceNode;
+    function updateTypeReferenceNode(node, typeName, typeArguments) {
+        return node.typeName !== typeName
+            || node.typeArguments !== typeArguments
+            ? updateNode(createTypeReferenceNode(typeName, typeArguments), node)
+            : node;
+    }
+    ts.updateTypeReferenceNode = updateTypeReferenceNode;
+    function createFunctionTypeNode(typeParameters, parameters, type) {
+        return createSignatureDeclaration(160 /* FunctionType */, typeParameters, parameters, type);
+    }
+    ts.createFunctionTypeNode = createFunctionTypeNode;
+    function updateFunctionTypeNode(node, typeParameters, parameters, type) {
+        return updateSignatureDeclaration(node, typeParameters, parameters, type);
+    }
+    ts.updateFunctionTypeNode = updateFunctionTypeNode;
+    function createConstructorTypeNode(typeParameters, parameters, type) {
+        return createSignatureDeclaration(161 /* ConstructorType */, typeParameters, parameters, type);
+    }
+    ts.createConstructorTypeNode = createConstructorTypeNode;
+    function updateConstructorTypeNode(node, typeParameters, parameters, type) {
+        return updateSignatureDeclaration(node, typeParameters, parameters, type);
+    }
+    ts.updateConstructorTypeNode = updateConstructorTypeNode;
+    function createTypeQueryNode(exprName) {
+        var node = createSynthesizedNode(162 /* TypeQuery */);
+        node.exprName = exprName;
+        return node;
+    }
+    ts.createTypeQueryNode = createTypeQueryNode;
+    function updateTypeQueryNode(node, exprName) {
+        return node.exprName !== exprName
+            ? updateNode(createTypeQueryNode(exprName), node)
+            : node;
+    }
+    ts.updateTypeQueryNode = updateTypeQueryNode;
+    function createTypeLiteralNode(members) {
+        var node = createSynthesizedNode(163 /* TypeLiteral */);
+        node.members = createNodeArray(members);
+        return node;
+    }
+    ts.createTypeLiteralNode = createTypeLiteralNode;
+    function updateTypeLiteralNode(node, members) {
+        return node.members !== members
+            ? updateNode(createTypeLiteralNode(members), node)
+            : node;
+    }
+    ts.updateTypeLiteralNode = updateTypeLiteralNode;
+    function createArrayTypeNode(elementType) {
+        var node = createSynthesizedNode(164 /* ArrayType */);
+        node.elementType = ts.parenthesizeElementTypeMember(elementType);
+        return node;
+    }
+    ts.createArrayTypeNode = createArrayTypeNode;
+    function updateArrayTypeNode(node, elementType) {
+        return node.elementType !== elementType
+            ? updateNode(createArrayTypeNode(elementType), node)
+            : node;
+    }
+    ts.updateArrayTypeNode = updateArrayTypeNode;
+    function createTupleTypeNode(elementTypes) {
+        var node = createSynthesizedNode(165 /* TupleType */);
+        node.elementTypes = createNodeArray(elementTypes);
+        return node;
+    }
+    ts.createTupleTypeNode = createTupleTypeNode;
+    function updateTypleTypeNode(node, elementTypes) {
+        return node.elementTypes !== elementTypes
+            ? updateNode(createTupleTypeNode(elementTypes), node)
+            : node;
+    }
+    ts.updateTypleTypeNode = updateTypleTypeNode;
+    function createUnionTypeNode(types) {
+        return createUnionOrIntersectionTypeNode(166 /* UnionType */, types);
+    }
+    ts.createUnionTypeNode = createUnionTypeNode;
+    function updateUnionTypeNode(node, types) {
+        return updateUnionOrIntersectionTypeNode(node, types);
+    }
+    ts.updateUnionTypeNode = updateUnionTypeNode;
+    function createIntersectionTypeNode(types) {
+        return createUnionOrIntersectionTypeNode(167 /* IntersectionType */, types);
+    }
+    ts.createIntersectionTypeNode = createIntersectionTypeNode;
+    function updateIntersectionTypeNode(node, types) {
+        return updateUnionOrIntersectionTypeNode(node, types);
+    }
+    ts.updateIntersectionTypeNode = updateIntersectionTypeNode;
+    function createUnionOrIntersectionTypeNode(kind, types) {
+        var node = createSynthesizedNode(kind);
+        node.types = ts.parenthesizeElementTypeMembers(types);
+        return node;
+    }
+    ts.createUnionOrIntersectionTypeNode = createUnionOrIntersectionTypeNode;
+    function updateUnionOrIntersectionTypeNode(node, types) {
+        return node.types !== types
+            ? updateNode(createUnionOrIntersectionTypeNode(node.kind, types), node)
+            : node;
+    }
+    function createParenthesizedType(type) {
+        var node = createSynthesizedNode(168 /* ParenthesizedType */);
+        node.type = type;
+        return node;
+    }
+    ts.createParenthesizedType = createParenthesizedType;
+    function updateParenthesizedType(node, type) {
+        return node.type !== type
+            ? updateNode(createParenthesizedType(type), node)
+            : node;
+    }
+    ts.updateParenthesizedType = updateParenthesizedType;
+    function createThisTypeNode() {
+        return createSynthesizedNode(169 /* ThisType */);
+    }
+    ts.createThisTypeNode = createThisTypeNode;
+    function createTypeOperatorNode(type) {
+        var node = createSynthesizedNode(170 /* TypeOperator */);
+        node.operator = 127 /* KeyOfKeyword */;
+        node.type = ts.parenthesizeElementTypeMember(type);
+        return node;
+    }
+    ts.createTypeOperatorNode = createTypeOperatorNode;
+    function updateTypeOperatorNode(node, type) {
+        return node.type !== type ? updateNode(createTypeOperatorNode(type), node) : node;
+    }
+    ts.updateTypeOperatorNode = updateTypeOperatorNode;
+    function createIndexedAccessTypeNode(objectType, indexType) {
+        var node = createSynthesizedNode(171 /* IndexedAccessType */);
+        node.objectType = ts.parenthesizeElementTypeMember(objectType);
+        node.indexType = indexType;
+        return node;
+    }
+    ts.createIndexedAccessTypeNode = createIndexedAccessTypeNode;
+    function updateIndexedAccessTypeNode(node, objectType, indexType) {
+        return node.objectType !== objectType
+            || node.indexType !== indexType
+            ? updateNode(createIndexedAccessTypeNode(objectType, indexType), node)
+            : node;
+    }
+    ts.updateIndexedAccessTypeNode = updateIndexedAccessTypeNode;
+    function createMappedTypeNode(readonlyToken, typeParameter, questionToken, type) {
+        var node = createSynthesizedNode(172 /* MappedType */);
+        node.readonlyToken = readonlyToken;
+        node.typeParameter = typeParameter;
+        node.questionToken = questionToken;
+        node.type = type;
+        return node;
+    }
+    ts.createMappedTypeNode = createMappedTypeNode;
+    function updateMappedTypeNode(node, readonlyToken, typeParameter, questionToken, type) {
+        return node.readonlyToken !== readonlyToken
+            || node.typeParameter !== typeParameter
+            || node.questionToken !== questionToken
+            || node.type !== type
+            ? updateNode(createMappedTypeNode(readonlyToken, typeParameter, questionToken, type), node)
+            : node;
+    }
+    ts.updateMappedTypeNode = updateMappedTypeNode;
+    function createLiteralTypeNode(literal) {
+        var node = createSynthesizedNode(173 /* LiteralType */);
+        node.literal = literal;
+        return node;
+    }
+    ts.createLiteralTypeNode = createLiteralTypeNode;
+    function updateLiteralTypeNode(node, literal) {
+        return node.literal !== literal
+            ? updateNode(createLiteralTypeNode(literal), node)
+            : node;
+    }
+    ts.updateLiteralTypeNode = updateLiteralTypeNode;
+    // Binding Patterns
+    function createObjectBindingPattern(elements) {
+        var node = createSynthesizedNode(174 /* ObjectBindingPattern */);
+        node.elements = createNodeArray(elements);
+        return node;
+    }
+    ts.createObjectBindingPattern = createObjectBindingPattern;
+    function updateObjectBindingPattern(node, elements) {
+        return node.elements !== elements
+            ? updateNode(createObjectBindingPattern(elements), node)
+            : node;
+    }
+    ts.updateObjectBindingPattern = updateObjectBindingPattern;
+    function createArrayBindingPattern(elements) {
+        var node = createSynthesizedNode(175 /* ArrayBindingPattern */);
+        node.elements = createNodeArray(elements);
+        return node;
+    }
+    ts.createArrayBindingPattern = createArrayBindingPattern;
+    function updateArrayBindingPattern(node, elements) {
+        return node.elements !== elements
+            ? updateNode(createArrayBindingPattern(elements), node)
+            : node;
+    }
+    ts.updateArrayBindingPattern = updateArrayBindingPattern;
+    function createBindingElement(dotDotDotToken, propertyName, name, initializer) {
+        var node = createSynthesizedNode(176 /* BindingElement */);
+        node.dotDotDotToken = dotDotDotToken;
+        node.propertyName = asName(propertyName);
+        node.name = asName(name);
+        node.initializer = initializer;
+        return node;
+    }
+    ts.createBindingElement = createBindingElement;
+    function updateBindingElement(node, dotDotDotToken, propertyName, name, initializer) {
+        return node.propertyName !== propertyName
+            || node.dotDotDotToken !== dotDotDotToken
+            || node.name !== name
+            || node.initializer !== initializer
+            ? updateNode(createBindingElement(dotDotDotToken, propertyName, name, initializer), node)
+            : node;
+    }
+    ts.updateBindingElement = updateBindingElement;
+    // Expression
+    function createArrayLiteral(elements, multiLine) {
+        var node = createSynthesizedNode(177 /* ArrayLiteralExpression */);
+        node.elements = ts.parenthesizeListElements(createNodeArray(elements));
+        if (multiLine)
+            node.multiLine = true;
+        return node;
+    }
+    ts.createArrayLiteral = createArrayLiteral;
+    function updateArrayLiteral(node, elements) {
+        return node.elements !== elements
+            ? updateNode(createArrayLiteral(elements, node.multiLine), node)
+            : node;
+    }
+    ts.updateArrayLiteral = updateArrayLiteral;
+    function createObjectLiteral(properties, multiLine) {
+        var node = createSynthesizedNode(178 /* ObjectLiteralExpression */);
+        node.properties = createNodeArray(properties);
+        if (multiLine)
+            node.multiLine = true;
+        return node;
+    }
+    ts.createObjectLiteral = createObjectLiteral;
+    function updateObjectLiteral(node, properties) {
+        return node.properties !== properties
+            ? updateNode(createObjectLiteral(properties, node.multiLine), node)
+            : node;
+    }
+    ts.updateObjectLiteral = updateObjectLiteral;
+    function createPropertyAccess(expression, name) {
+        var node = createSynthesizedNode(179 /* PropertyAccessExpression */);
+        node.expression = ts.parenthesizeForAccess(expression);
+        node.name = asName(name);
+        setEmitFlags(node, 131072 /* NoIndentation */);
+        return node;
+    }
+    ts.createPropertyAccess = createPropertyAccess;
+    function updatePropertyAccess(node, expression, name) {
+        // Because we are updating existed propertyAccess we want to inherit its emitFlags
+        // instead of using the default from createPropertyAccess
+        return node.expression !== expression
+            || node.name !== name
+            ? updateNode(setEmitFlags(createPropertyAccess(expression, name), ts.getEmitFlags(node)), node)
+            : node;
+    }
+    ts.updatePropertyAccess = updatePropertyAccess;
+    function createElementAccess(expression, index) {
+        var node = createSynthesizedNode(180 /* ElementAccessExpression */);
+        node.expression = ts.parenthesizeForAccess(expression);
+        node.argumentExpression = asExpression(index);
+        return node;
     }
-    ts.getOptionNameMap = getOptionNameMap;
-    /* @internal */
-    function createCompilerDiagnosticForInvalidCustomType(opt) {
-        var namesOfType = [];
-        for (var key in opt.type) {
-            namesOfType.push(" '" + key + "'");
-        }
-        return ts.createCompilerDiagnostic(ts.Diagnostics.Argument_for_0_option_must_be_Colon_1, "--" + opt.name, namesOfType);
+    ts.createElementAccess = createElementAccess;
+    function updateElementAccess(node, expression, argumentExpression) {
+        return node.expression !== expression
+            || node.argumentExpression !== argumentExpression
+            ? updateNode(createElementAccess(expression, argumentExpression), node)
+            : node;
     }
-    ts.createCompilerDiagnosticForInvalidCustomType = createCompilerDiagnosticForInvalidCustomType;
-    /* @internal */
-    function parseCustomTypeOption(opt, value, errors) {
-        var key = trimString((value || "")).toLowerCase();
-        var map = opt.type;
-        if (key in map) {
-            return map[key];
-        }
-        else {
-            errors.push(createCompilerDiagnosticForInvalidCustomType(opt));
-        }
+    ts.updateElementAccess = updateElementAccess;
+    function createCall(expression, typeArguments, argumentsArray) {
+        var node = createSynthesizedNode(181 /* CallExpression */);
+        node.expression = ts.parenthesizeForAccess(expression);
+        node.typeArguments = asNodeArray(typeArguments);
+        node.arguments = ts.parenthesizeListElements(createNodeArray(argumentsArray));
+        return node;
     }
-    ts.parseCustomTypeOption = parseCustomTypeOption;
-    /* @internal */
-    function parseListTypeOption(opt, value, errors) {
-        if (value === void 0) { value = ""; }
-        value = trimString(value);
-        if (ts.startsWith(value, "-")) {
-            return undefined;
-        }
-        if (value === "") {
-            return [];
-        }
-        var values = value.split(",");
-        switch (opt.element.type) {
-            case "number":
-                return ts.map(values, parseInt);
-            case "string":
-                return ts.map(values, function (v) { return v || ""; });
-            default:
-                return ts.filter(ts.map(values, function (v) { return parseCustomTypeOption(opt.element, v, errors); }), function (v) { return !!v; });
-        }
+    ts.createCall = createCall;
+    function updateCall(node, expression, typeArguments, argumentsArray) {
+        return node.expression !== expression
+            || node.typeArguments !== typeArguments
+            || node.arguments !== argumentsArray
+            ? updateNode(createCall(expression, typeArguments, argumentsArray), node)
+            : node;
     }
-    ts.parseListTypeOption = parseListTypeOption;
-    /* @internal */
-    function parseCommandLine(commandLine, readFile) {
-        var options = {};
-        var fileNames = [];
-        var errors = [];
-        var _a = getOptionNameMap(), optionNameMap = _a.optionNameMap, shortOptionNames = _a.shortOptionNames;
-        parseStrings(commandLine);
-        return {
-            options: options,
-            fileNames: fileNames,
-            errors: errors
-        };
-        function parseStrings(args) {
-            var i = 0;
-            while (i < args.length) {
-                var s = args[i];
-                i++;
-                if (s.charCodeAt(0) === 64 /* at */) {
-                    parseResponseFile(s.slice(1));
-                }
-                else if (s.charCodeAt(0) === 45 /* minus */) {
-                    s = s.slice(s.charCodeAt(1) === 45 /* minus */ ? 2 : 1).toLowerCase();
-                    // Try to translate short option names to their full equivalents.
-                    if (s in shortOptionNames) {
-                        s = shortOptionNames[s];
-                    }
-                    if (s in optionNameMap) {
-                        var opt = optionNameMap[s];
-                        if (opt.isTSConfigOnly) {
-                            errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_can_only_be_specified_in_tsconfig_json_file, opt.name));
-                        }
-                        else {
-                            // Check to see if no argument was provided (e.g. "--locale" is the last command-line argument).
-                            if (!args[i] && opt.type !== "boolean") {
-                                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_expects_an_argument, opt.name));
-                            }
-                            switch (opt.type) {
-                                case "number":
-                                    options[opt.name] = parseInt(args[i]);
-                                    i++;
-                                    break;
-                                case "boolean":
-                                    options[opt.name] = true;
-                                    break;
-                                case "string":
-                                    options[opt.name] = args[i] || "";
-                                    i++;
-                                    break;
-                                case "list":
-                                    var result = parseListTypeOption(opt, args[i], errors);
-                                    options[opt.name] = result || [];
-                                    if (result) {
-                                        i++;
-                                    }
-                                    break;
-                                // If not a primitive, the possible types are specified in what is effectively a map of options.
-                                default:
-                                    options[opt.name] = parseCustomTypeOption(opt, args[i], errors);
-                                    i++;
-                                    break;
-                            }
-                        }
-                    }
-                    else {
-                        errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unknown_compiler_option_0, s));
-                    }
-                }
-                else {
-                    fileNames.push(s);
-                }
-            }
-        }
-        function parseResponseFile(fileName) {
-            var text = readFile ? readFile(fileName) : ts.sys.readFile(fileName);
-            if (!text) {
-                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.File_0_not_found, fileName));
-                return;
-            }
-            var args = [];
-            var pos = 0;
-            while (true) {
-                while (pos < text.length && text.charCodeAt(pos) <= 32 /* space */)
-                    pos++;
-                if (pos >= text.length)
-                    break;
-                var start = pos;
-                if (text.charCodeAt(start) === 34 /* doubleQuote */) {
-                    pos++;
-                    while (pos < text.length && text.charCodeAt(pos) !== 34 /* doubleQuote */)
-                        pos++;
-                    if (pos < text.length) {
-                        args.push(text.substring(start + 1, pos));
-                        pos++;
-                    }
-                    else {
-                        errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unterminated_quoted_string_in_response_file_0, fileName));
-                    }
-                }
-                else {
-                    while (text.charCodeAt(pos) > 32 /* space */)
-                        pos++;
-                    args.push(text.substring(start, pos));
-                }
-            }
-            parseStrings(args);
-        }
+    ts.updateCall = updateCall;
+    function createNew(expression, typeArguments, argumentsArray) {
+        var node = createSynthesizedNode(182 /* NewExpression */);
+        node.expression = ts.parenthesizeForNew(expression);
+        node.typeArguments = asNodeArray(typeArguments);
+        node.arguments = argumentsArray ? ts.parenthesizeListElements(createNodeArray(argumentsArray)) : undefined;
+        return node;
+    }
+    ts.createNew = createNew;
+    function updateNew(node, expression, typeArguments, argumentsArray) {
+        return node.expression !== expression
+            || node.typeArguments !== typeArguments
+            || node.arguments !== argumentsArray
+            ? updateNode(createNew(expression, typeArguments, argumentsArray), node)
+            : node;
+    }
+    ts.updateNew = updateNew;
+    function createTaggedTemplate(tag, template) {
+        var node = createSynthesizedNode(183 /* TaggedTemplateExpression */);
+        node.tag = ts.parenthesizeForAccess(tag);
+        node.template = template;
+        return node;
+    }
+    ts.createTaggedTemplate = createTaggedTemplate;
+    function updateTaggedTemplate(node, tag, template) {
+        return node.tag !== tag
+            || node.template !== template
+            ? updateNode(createTaggedTemplate(tag, template), node)
+            : node;
+    }
+    ts.updateTaggedTemplate = updateTaggedTemplate;
+    function createTypeAssertion(type, expression) {
+        var node = createSynthesizedNode(184 /* TypeAssertionExpression */);
+        node.type = type;
+        node.expression = ts.parenthesizePrefixOperand(expression);
+        return node;
+    }
+    ts.createTypeAssertion = createTypeAssertion;
+    function updateTypeAssertion(node, type, expression) {
+        return node.type !== type
+            || node.expression !== expression
+            ? updateNode(createTypeAssertion(type, expression), node)
+            : node;
+    }
+    ts.updateTypeAssertion = updateTypeAssertion;
+    function createParen(expression) {
+        var node = createSynthesizedNode(185 /* ParenthesizedExpression */);
+        node.expression = expression;
+        return node;
+    }
+    ts.createParen = createParen;
+    function updateParen(node, expression) {
+        return node.expression !== expression
+            ? updateNode(createParen(expression), node)
+            : node;
+    }
+    ts.updateParen = updateParen;
+    function createFunctionExpression(modifiers, asteriskToken, name, typeParameters, parameters, type, body) {
+        var node = createSynthesizedNode(186 /* FunctionExpression */);
+        node.modifiers = asNodeArray(modifiers);
+        node.asteriskToken = asteriskToken;
+        node.name = asName(name);
+        node.typeParameters = asNodeArray(typeParameters);
+        node.parameters = createNodeArray(parameters);
+        node.type = type;
+        node.body = body;
+        return node;
+    }
+    ts.createFunctionExpression = createFunctionExpression;
+    function updateFunctionExpression(node, modifiers, asteriskToken, name, typeParameters, parameters, type, body) {
+        return node.name !== name
+            || node.modifiers !== modifiers
+            || node.asteriskToken !== asteriskToken
+            || node.typeParameters !== typeParameters
+            || node.parameters !== parameters
+            || node.type !== type
+            || node.body !== body
+            ? updateNode(createFunctionExpression(modifiers, asteriskToken, name, typeParameters, parameters, type, body), node)
+            : node;
+    }
+    ts.updateFunctionExpression = updateFunctionExpression;
+    function createArrowFunction(modifiers, typeParameters, parameters, type, equalsGreaterThanToken, body) {
+        var node = createSynthesizedNode(187 /* ArrowFunction */);
+        node.modifiers = asNodeArray(modifiers);
+        node.typeParameters = asNodeArray(typeParameters);
+        node.parameters = createNodeArray(parameters);
+        node.type = type;
+        node.equalsGreaterThanToken = equalsGreaterThanToken || createToken(36 /* EqualsGreaterThanToken */);
+        node.body = ts.parenthesizeConciseBody(body);
+        return node;
+    }
+    ts.createArrowFunction = createArrowFunction;
+    function updateArrowFunction(node, modifiers, typeParameters, parameters, type, body) {
+        return node.modifiers !== modifiers
+            || node.typeParameters !== typeParameters
+            || node.parameters !== parameters
+            || node.type !== type
+            || node.body !== body
+            ? updateNode(createArrowFunction(modifiers, typeParameters, parameters, type, node.equalsGreaterThanToken, body), node)
+            : node;
+    }
+    ts.updateArrowFunction = updateArrowFunction;
+    function createDelete(expression) {
+        var node = createSynthesizedNode(188 /* DeleteExpression */);
+        node.expression = ts.parenthesizePrefixOperand(expression);
+        return node;
+    }
+    ts.createDelete = createDelete;
+    function updateDelete(node, expression) {
+        return node.expression !== expression
+            ? updateNode(createDelete(expression), node)
+            : node;
+    }
+    ts.updateDelete = updateDelete;
+    function createTypeOf(expression) {
+        var node = createSynthesizedNode(189 /* TypeOfExpression */);
+        node.expression = ts.parenthesizePrefixOperand(expression);
+        return node;
+    }
+    ts.createTypeOf = createTypeOf;
+    function updateTypeOf(node, expression) {
+        return node.expression !== expression
+            ? updateNode(createTypeOf(expression), node)
+            : node;
+    }
+    ts.updateTypeOf = updateTypeOf;
+    function createVoid(expression) {
+        var node = createSynthesizedNode(190 /* VoidExpression */);
+        node.expression = ts.parenthesizePrefixOperand(expression);
+        return node;
+    }
+    ts.createVoid = createVoid;
+    function updateVoid(node, expression) {
+        return node.expression !== expression
+            ? updateNode(createVoid(expression), node)
+            : node;
+    }
+    ts.updateVoid = updateVoid;
+    function createAwait(expression) {
+        var node = createSynthesizedNode(191 /* AwaitExpression */);
+        node.expression = ts.parenthesizePrefixOperand(expression);
+        return node;
+    }
+    ts.createAwait = createAwait;
+    function updateAwait(node, expression) {
+        return node.expression !== expression
+            ? updateNode(createAwait(expression), node)
+            : node;
+    }
+    ts.updateAwait = updateAwait;
+    function createPrefix(operator, operand) {
+        var node = createSynthesizedNode(192 /* PrefixUnaryExpression */);
+        node.operator = operator;
+        node.operand = ts.parenthesizePrefixOperand(operand);
+        return node;
+    }
+    ts.createPrefix = createPrefix;
+    function updatePrefix(node, operand) {
+        return node.operand !== operand
+            ? updateNode(createPrefix(node.operator, operand), node)
+            : node;
+    }
+    ts.updatePrefix = updatePrefix;
+    function createPostfix(operand, operator) {
+        var node = createSynthesizedNode(193 /* PostfixUnaryExpression */);
+        node.operand = ts.parenthesizePostfixOperand(operand);
+        node.operator = operator;
+        return node;
+    }
+    ts.createPostfix = createPostfix;
+    function updatePostfix(node, operand) {
+        return node.operand !== operand
+            ? updateNode(createPostfix(operand, node.operator), node)
+            : node;
+    }
+    ts.updatePostfix = updatePostfix;
+    function createBinary(left, operator, right) {
+        var node = createSynthesizedNode(194 /* BinaryExpression */);
+        var operatorToken = asToken(operator);
+        var operatorKind = operatorToken.kind;
+        node.left = ts.parenthesizeBinaryOperand(operatorKind, left, /*isLeftSideOfBinary*/ true, /*leftOperand*/ undefined);
+        node.operatorToken = operatorToken;
+        node.right = ts.parenthesizeBinaryOperand(operatorKind, right, /*isLeftSideOfBinary*/ false, node.left);
+        return node;
+    }
+    ts.createBinary = createBinary;
+    function updateBinary(node, left, right, operator) {
+        return node.left !== left
+            || node.right !== right
+            ? updateNode(createBinary(left, operator || node.operatorToken, right), node)
+            : node;
+    }
+    ts.updateBinary = updateBinary;
+    function createConditional(condition, questionTokenOrWhenTrue, whenTrueOrWhenFalse, colonToken, whenFalse) {
+        var node = createSynthesizedNode(195 /* ConditionalExpression */);
+        node.condition = ts.parenthesizeForConditionalHead(condition);
+        node.questionToken = whenFalse ? questionTokenOrWhenTrue : createToken(55 /* QuestionToken */);
+        node.whenTrue = ts.parenthesizeSubexpressionOfConditionalExpression(whenFalse ? whenTrueOrWhenFalse : questionTokenOrWhenTrue);
+        node.colonToken = whenFalse ? colonToken : createToken(56 /* ColonToken */);
+        node.whenFalse = ts.parenthesizeSubexpressionOfConditionalExpression(whenFalse ? whenFalse : whenTrueOrWhenFalse);
+        return node;
+    }
+    ts.createConditional = createConditional;
+    function updateConditional(node, condition, whenTrue, whenFalse) {
+        return node.condition !== condition
+            || node.whenTrue !== whenTrue
+            || node.whenFalse !== whenFalse
+            ? updateNode(createConditional(condition, node.questionToken, whenTrue, node.colonToken, whenFalse), node)
+            : node;
+    }
+    ts.updateConditional = updateConditional;
+    function createTemplateExpression(head, templateSpans) {
+        var node = createSynthesizedNode(196 /* TemplateExpression */);
+        node.head = head;
+        node.templateSpans = createNodeArray(templateSpans);
+        return node;
+    }
+    ts.createTemplateExpression = createTemplateExpression;
+    function updateTemplateExpression(node, head, templateSpans) {
+        return node.head !== head
+            || node.templateSpans !== templateSpans
+            ? updateNode(createTemplateExpression(head, templateSpans), node)
+            : node;
+    }
+    ts.updateTemplateExpression = updateTemplateExpression;
+    function createYield(asteriskTokenOrExpression, expression) {
+        var node = createSynthesizedNode(197 /* YieldExpression */);
+        node.asteriskToken = asteriskTokenOrExpression && asteriskTokenOrExpression.kind === 39 /* AsteriskToken */ ? asteriskTokenOrExpression : undefined;
+        node.expression = asteriskTokenOrExpression && asteriskTokenOrExpression.kind !== 39 /* AsteriskToken */ ? asteriskTokenOrExpression : expression;
+        return node;
+    }
+    ts.createYield = createYield;
+    function updateYield(node, asteriskToken, expression) {
+        return node.expression !== expression
+            || node.asteriskToken !== asteriskToken
+            ? updateNode(createYield(asteriskToken, expression), node)
+            : node;
+    }
+    ts.updateYield = updateYield;
+    function createSpread(expression) {
+        var node = createSynthesizedNode(198 /* SpreadElement */);
+        node.expression = ts.parenthesizeExpressionForList(expression);
+        return node;
+    }
+    ts.createSpread = createSpread;
+    function updateSpread(node, expression) {
+        return node.expression !== expression
+            ? updateNode(createSpread(expression), node)
+            : node;
+    }
+    ts.updateSpread = updateSpread;
+    function createClassExpression(modifiers, name, typeParameters, heritageClauses, members) {
+        var node = createSynthesizedNode(199 /* ClassExpression */);
+        node.decorators = undefined;
+        node.modifiers = asNodeArray(modifiers);
+        node.name = asName(name);
+        node.typeParameters = asNodeArray(typeParameters);
+        node.heritageClauses = asNodeArray(heritageClauses);
+        node.members = createNodeArray(members);
+        return node;
+    }
+    ts.createClassExpression = createClassExpression;
+    function updateClassExpression(node, modifiers, name, typeParameters, heritageClauses, members) {
+        return node.modifiers !== modifiers
+            || node.name !== name
+            || node.typeParameters !== typeParameters
+            || node.heritageClauses !== heritageClauses
+            || node.members !== members
+            ? updateNode(createClassExpression(modifiers, name, typeParameters, heritageClauses, members), node)
+            : node;
+    }
+    ts.updateClassExpression = updateClassExpression;
+    function createOmittedExpression() {
+        return createSynthesizedNode(200 /* OmittedExpression */);
+    }
+    ts.createOmittedExpression = createOmittedExpression;
+    function createExpressionWithTypeArguments(typeArguments, expression) {
+        var node = createSynthesizedNode(201 /* ExpressionWithTypeArguments */);
+        node.expression = ts.parenthesizeForAccess(expression);
+        node.typeArguments = asNodeArray(typeArguments);
+        return node;
+    }
+    ts.createExpressionWithTypeArguments = createExpressionWithTypeArguments;
+    function updateExpressionWithTypeArguments(node, typeArguments, expression) {
+        return node.typeArguments !== typeArguments
+            || node.expression !== expression
+            ? updateNode(createExpressionWithTypeArguments(typeArguments, expression), node)
+            : node;
+    }
+    ts.updateExpressionWithTypeArguments = updateExpressionWithTypeArguments;
+    function createAsExpression(expression, type) {
+        var node = createSynthesizedNode(202 /* AsExpression */);
+        node.expression = expression;
+        node.type = type;
+        return node;
+    }
+    ts.createAsExpression = createAsExpression;
+    function updateAsExpression(node, expression, type) {
+        return node.expression !== expression
+            || node.type !== type
+            ? updateNode(createAsExpression(expression, type), node)
+            : node;
+    }
+    ts.updateAsExpression = updateAsExpression;
+    function createNonNullExpression(expression) {
+        var node = createSynthesizedNode(203 /* NonNullExpression */);
+        node.expression = ts.parenthesizeForAccess(expression);
+        return node;
+    }
+    ts.createNonNullExpression = createNonNullExpression;
+    function updateNonNullExpression(node, expression) {
+        return node.expression !== expression
+            ? updateNode(createNonNullExpression(expression), node)
+            : node;
+    }
+    ts.updateNonNullExpression = updateNonNullExpression;
+    function createMetaProperty(keywordToken, name) {
+        var node = createSynthesizedNode(204 /* MetaProperty */);
+        node.keywordToken = keywordToken;
+        node.name = name;
+        return node;
+    }
+    ts.createMetaProperty = createMetaProperty;
+    function updateMetaProperty(node, name) {
+        return node.name !== name
+            ? updateNode(createMetaProperty(node.keywordToken, name), node)
+            : node;
+    }
+    ts.updateMetaProperty = updateMetaProperty;
+    // Misc
+    function createTemplateSpan(expression, literal) {
+        var node = createSynthesizedNode(205 /* TemplateSpan */);
+        node.expression = expression;
+        node.literal = literal;
+        return node;
+    }
+    ts.createTemplateSpan = createTemplateSpan;
+    function updateTemplateSpan(node, expression, literal) {
+        return node.expression !== expression
+            || node.literal !== literal
+            ? updateNode(createTemplateSpan(expression, literal), node)
+            : node;
+    }
+    ts.updateTemplateSpan = updateTemplateSpan;
+    function createSemicolonClassElement() {
+        return createSynthesizedNode(206 /* SemicolonClassElement */);
+    }
+    ts.createSemicolonClassElement = createSemicolonClassElement;
+    // Element
+    function createBlock(statements, multiLine) {
+        var block = createSynthesizedNode(207 /* Block */);
+        block.statements = createNodeArray(statements);
+        if (multiLine)
+            block.multiLine = multiLine;
+        return block;
+    }
+    ts.createBlock = createBlock;
+    function updateBlock(node, statements) {
+        return node.statements !== statements
+            ? updateNode(createBlock(statements, node.multiLine), node)
+            : node;
+    }
+    ts.updateBlock = updateBlock;
+    function createVariableStatement(modifiers, declarationList) {
+        var node = createSynthesizedNode(208 /* VariableStatement */);
+        node.decorators = undefined;
+        node.modifiers = asNodeArray(modifiers);
+        node.declarationList = ts.isArray(declarationList) ? createVariableDeclarationList(declarationList) : declarationList;
+        return node;
+    }
+    ts.createVariableStatement = createVariableStatement;
+    function updateVariableStatement(node, modifiers, declarationList) {
+        return node.modifiers !== modifiers
+            || node.declarationList !== declarationList
+            ? updateNode(createVariableStatement(modifiers, declarationList), node)
+            : node;
+    }
+    ts.updateVariableStatement = updateVariableStatement;
+    function createEmptyStatement() {
+        return createSynthesizedNode(209 /* EmptyStatement */);
+    }
+    ts.createEmptyStatement = createEmptyStatement;
+    function createStatement(expression) {
+        var node = createSynthesizedNode(210 /* ExpressionStatement */);
+        node.expression = ts.parenthesizeExpressionForExpressionStatement(expression);
+        return node;
+    }
+    ts.createStatement = createStatement;
+    function updateStatement(node, expression) {
+        return node.expression !== expression
+            ? updateNode(createStatement(expression), node)
+            : node;
+    }
+    ts.updateStatement = updateStatement;
+    function createIf(expression, thenStatement, elseStatement) {
+        var node = createSynthesizedNode(211 /* IfStatement */);
+        node.expression = expression;
+        node.thenStatement = thenStatement;
+        node.elseStatement = elseStatement;
+        return node;
+    }
+    ts.createIf = createIf;
+    function updateIf(node, expression, thenStatement, elseStatement) {
+        return node.expression !== expression
+            || node.thenStatement !== thenStatement
+            || node.elseStatement !== elseStatement
+            ? updateNode(createIf(expression, thenStatement, elseStatement), node)
+            : node;
+    }
+    ts.updateIf = updateIf;
+    function createDo(statement, expression) {
+        var node = createSynthesizedNode(212 /* DoStatement */);
+        node.statement = statement;
+        node.expression = expression;
+        return node;
+    }
+    ts.createDo = createDo;
+    function updateDo(node, statement, expression) {
+        return node.statement !== statement
+            || node.expression !== expression
+            ? updateNode(createDo(statement, expression), node)
+            : node;
+    }
+    ts.updateDo = updateDo;
+    function createWhile(expression, statement) {
+        var node = createSynthesizedNode(213 /* WhileStatement */);
+        node.expression = expression;
+        node.statement = statement;
+        return node;
+    }
+    ts.createWhile = createWhile;
+    function updateWhile(node, expression, statement) {
+        return node.expression !== expression
+            || node.statement !== statement
+            ? updateNode(createWhile(expression, statement), node)
+            : node;
+    }
+    ts.updateWhile = updateWhile;
+    function createFor(initializer, condition, incrementor, statement) {
+        var node = createSynthesizedNode(214 /* ForStatement */);
+        node.initializer = initializer;
+        node.condition = condition;
+        node.incrementor = incrementor;
+        node.statement = statement;
+        return node;
+    }
+    ts.createFor = createFor;
+    function updateFor(node, initializer, condition, incrementor, statement) {
+        return node.initializer !== initializer
+            || node.condition !== condition
+            || node.incrementor !== incrementor
+            || node.statement !== statement
+            ? updateNode(createFor(initializer, condition, incrementor, statement), node)
+            : node;
+    }
+    ts.updateFor = updateFor;
+    function createForIn(initializer, expression, statement) {
+        var node = createSynthesizedNode(215 /* ForInStatement */);
+        node.initializer = initializer;
+        node.expression = expression;
+        node.statement = statement;
+        return node;
+    }
+    ts.createForIn = createForIn;
+    function updateForIn(node, initializer, expression, statement) {
+        return node.initializer !== initializer
+            || node.expression !== expression
+            || node.statement !== statement
+            ? updateNode(createForIn(initializer, expression, statement), node)
+            : node;
+    }
+    ts.updateForIn = updateForIn;
+    function createForOf(awaitModifier, initializer, expression, statement) {
+        var node = createSynthesizedNode(216 /* ForOfStatement */);
+        node.awaitModifier = awaitModifier;
+        node.initializer = initializer;
+        node.expression = expression;
+        node.statement = statement;
+        return node;
+    }
+    ts.createForOf = createForOf;
+    function updateForOf(node, awaitModifier, initializer, expression, statement) {
+        return node.awaitModifier !== awaitModifier
+            || node.initializer !== initializer
+            || node.expression !== expression
+            || node.statement !== statement
+            ? updateNode(createForOf(awaitModifier, initializer, expression, statement), node)
+            : node;
+    }
+    ts.updateForOf = updateForOf;
+    function createContinue(label) {
+        var node = createSynthesizedNode(217 /* ContinueStatement */);
+        node.label = asName(label);
+        return node;
+    }
+    ts.createContinue = createContinue;
+    function updateContinue(node, label) {
+        return node.label !== label
+            ? updateNode(createContinue(label), node)
+            : node;
+    }
+    ts.updateContinue = updateContinue;
+    function createBreak(label) {
+        var node = createSynthesizedNode(218 /* BreakStatement */);
+        node.label = asName(label);
+        return node;
+    }
+    ts.createBreak = createBreak;
+    function updateBreak(node, label) {
+        return node.label !== label
+            ? updateNode(createBreak(label), node)
+            : node;
+    }
+    ts.updateBreak = updateBreak;
+    function createReturn(expression) {
+        var node = createSynthesizedNode(219 /* ReturnStatement */);
+        node.expression = expression;
+        return node;
+    }
+    ts.createReturn = createReturn;
+    function updateReturn(node, expression) {
+        return node.expression !== expression
+            ? updateNode(createReturn(expression), node)
+            : node;
+    }
+    ts.updateReturn = updateReturn;
+    function createWith(expression, statement) {
+        var node = createSynthesizedNode(220 /* WithStatement */);
+        node.expression = expression;
+        node.statement = statement;
+        return node;
+    }
+    ts.createWith = createWith;
+    function updateWith(node, expression, statement) {
+        return node.expression !== expression
+            || node.statement !== statement
+            ? updateNode(createWith(expression, statement), node)
+            : node;
+    }
+    ts.updateWith = updateWith;
+    function createSwitch(expression, caseBlock) {
+        var node = createSynthesizedNode(221 /* SwitchStatement */);
+        node.expression = ts.parenthesizeExpressionForList(expression);
+        node.caseBlock = caseBlock;
+        return node;
+    }
+    ts.createSwitch = createSwitch;
+    function updateSwitch(node, expression, caseBlock) {
+        return node.expression !== expression
+            || node.caseBlock !== caseBlock
+            ? updateNode(createSwitch(expression, caseBlock), node)
+            : node;
+    }
+    ts.updateSwitch = updateSwitch;
+    function createLabel(label, statement) {
+        var node = createSynthesizedNode(222 /* LabeledStatement */);
+        node.label = asName(label);
+        node.statement = statement;
+        return node;
+    }
+    ts.createLabel = createLabel;
+    function updateLabel(node, label, statement) {
+        return node.label !== label
+            || node.statement !== statement
+            ? updateNode(createLabel(label, statement), node)
+            : node;
+    }
+    ts.updateLabel = updateLabel;
+    function createThrow(expression) {
+        var node = createSynthesizedNode(223 /* ThrowStatement */);
+        node.expression = expression;
+        return node;
+    }
+    ts.createThrow = createThrow;
+    function updateThrow(node, expression) {
+        return node.expression !== expression
+            ? updateNode(createThrow(expression), node)
+            : node;
+    }
+    ts.updateThrow = updateThrow;
+    function createTry(tryBlock, catchClause, finallyBlock) {
+        var node = createSynthesizedNode(224 /* TryStatement */);
+        node.tryBlock = tryBlock;
+        node.catchClause = catchClause;
+        node.finallyBlock = finallyBlock;
+        return node;
+    }
+    ts.createTry = createTry;
+    function updateTry(node, tryBlock, catchClause, finallyBlock) {
+        return node.tryBlock !== tryBlock
+            || node.catchClause !== catchClause
+            || node.finallyBlock !== finallyBlock
+            ? updateNode(createTry(tryBlock, catchClause, finallyBlock), node)
+            : node;
+    }
+    ts.updateTry = updateTry;
+    function createDebuggerStatement() {
+        return createSynthesizedNode(225 /* DebuggerStatement */);
+    }
+    ts.createDebuggerStatement = createDebuggerStatement;
+    function createVariableDeclaration(name, type, initializer) {
+        var node = createSynthesizedNode(226 /* VariableDeclaration */);
+        node.name = asName(name);
+        node.type = type;
+        node.initializer = initializer !== undefined ? ts.parenthesizeExpressionForList(initializer) : undefined;
+        return node;
+    }
+    ts.createVariableDeclaration = createVariableDeclaration;
+    function updateVariableDeclaration(node, name, type, initializer) {
+        return node.name !== name
+            || node.type !== type
+            || node.initializer !== initializer
+            ? updateNode(createVariableDeclaration(name, type, initializer), node)
+            : node;
+    }
+    ts.updateVariableDeclaration = updateVariableDeclaration;
+    function createVariableDeclarationList(declarations, flags) {
+        var node = createSynthesizedNode(227 /* VariableDeclarationList */);
+        node.flags |= flags & 3 /* BlockScoped */;
+        node.declarations = createNodeArray(declarations);
+        return node;
+    }
+    ts.createVariableDeclarationList = createVariableDeclarationList;
+    function updateVariableDeclarationList(node, declarations) {
+        return node.declarations !== declarations
+            ? updateNode(createVariableDeclarationList(declarations, node.flags), node)
+            : node;
+    }
+    ts.updateVariableDeclarationList = updateVariableDeclarationList;
+    function createFunctionDeclaration(decorators, modifiers, asteriskToken, name, typeParameters, parameters, type, body) {
+        var node = createSynthesizedNode(228 /* FunctionDeclaration */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.asteriskToken = asteriskToken;
+        node.name = asName(name);
+        node.typeParameters = asNodeArray(typeParameters);
+        node.parameters = createNodeArray(parameters);
+        node.type = type;
+        node.body = body;
+        return node;
+    }
+    ts.createFunctionDeclaration = createFunctionDeclaration;
+    function updateFunctionDeclaration(node, decorators, modifiers, asteriskToken, name, typeParameters, parameters, type, body) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.asteriskToken !== asteriskToken
+            || node.name !== name
+            || node.typeParameters !== typeParameters
+            || node.parameters !== parameters
+            || node.type !== type
+            || node.body !== body
+            ? updateNode(createFunctionDeclaration(decorators, modifiers, asteriskToken, name, typeParameters, parameters, type, body), node)
+            : node;
+    }
+    ts.updateFunctionDeclaration = updateFunctionDeclaration;
+    function createClassDeclaration(decorators, modifiers, name, typeParameters, heritageClauses, members) {
+        var node = createSynthesizedNode(229 /* ClassDeclaration */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.name = asName(name);
+        node.typeParameters = asNodeArray(typeParameters);
+        node.heritageClauses = asNodeArray(heritageClauses);
+        node.members = createNodeArray(members);
+        return node;
+    }
+    ts.createClassDeclaration = createClassDeclaration;
+    function updateClassDeclaration(node, decorators, modifiers, name, typeParameters, heritageClauses, members) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.name !== name
+            || node.typeParameters !== typeParameters
+            || node.heritageClauses !== heritageClauses
+            || node.members !== members
+            ? updateNode(createClassDeclaration(decorators, modifiers, name, typeParameters, heritageClauses, members), node)
+            : node;
+    }
+    ts.updateClassDeclaration = updateClassDeclaration;
+    function createInterfaceDeclaration(decorators, modifiers, name, typeParameters, heritageClauses, members) {
+        var node = createSynthesizedNode(230 /* InterfaceDeclaration */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.name = asName(name);
+        node.typeParameters = asNodeArray(typeParameters);
+        node.heritageClauses = asNodeArray(heritageClauses);
+        node.members = createNodeArray(members);
+        return node;
+    }
+    ts.createInterfaceDeclaration = createInterfaceDeclaration;
+    function updateInterfaceDeclaration(node, decorators, modifiers, name, typeParameters, heritageClauses, members) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.name !== name
+            || node.typeParameters !== typeParameters
+            || node.heritageClauses !== heritageClauses
+            || node.members !== members
+            ? updateNode(createInterfaceDeclaration(decorators, modifiers, name, typeParameters, heritageClauses, members), node)
+            : node;
+    }
+    ts.updateInterfaceDeclaration = updateInterfaceDeclaration;
+    function createTypeAliasDeclaration(decorators, modifiers, name, typeParameters, type) {
+        var node = createSynthesizedNode(231 /* TypeAliasDeclaration */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.name = asName(name);
+        node.typeParameters = asNodeArray(typeParameters);
+        node.type = type;
+        return node;
+    }
+    ts.createTypeAliasDeclaration = createTypeAliasDeclaration;
+    function updateTypeAliasDeclaration(node, decorators, modifiers, name, typeParameters, type) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.name !== name
+            || node.typeParameters !== typeParameters
+            || node.type !== type
+            ? updateNode(createTypeAliasDeclaration(decorators, modifiers, name, typeParameters, type), node)
+            : node;
+    }
+    ts.updateTypeAliasDeclaration = updateTypeAliasDeclaration;
+    function createEnumDeclaration(decorators, modifiers, name, members) {
+        var node = createSynthesizedNode(232 /* EnumDeclaration */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.name = asName(name);
+        node.members = createNodeArray(members);
+        return node;
+    }
+    ts.createEnumDeclaration = createEnumDeclaration;
+    function updateEnumDeclaration(node, decorators, modifiers, name, members) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.name !== name
+            || node.members !== members
+            ? updateNode(createEnumDeclaration(decorators, modifiers, name, members), node)
+            : node;
     }
-    ts.parseCommandLine = parseCommandLine;
-    /**
-      * Read tsconfig.json file
-      * @param fileName The path to the config file
-      */
-    function readConfigFile(fileName, readFile) {
-        var text = "";
-        try {
-            text = readFile(fileName);
-        }
-        catch (e) {
-            return { error: ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_read_file_0_Colon_1, fileName, e.message) };
-        }
-        return parseConfigFileTextToJson(fileName, text);
+    ts.updateEnumDeclaration = updateEnumDeclaration;
+    function createModuleDeclaration(decorators, modifiers, name, body, flags) {
+        var node = createSynthesizedNode(233 /* ModuleDeclaration */);
+        node.flags |= flags & (16 /* Namespace */ | 4 /* NestedNamespace */ | 512 /* GlobalAugmentation */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.name = name;
+        node.body = body;
+        return node;
     }
-    ts.readConfigFile = readConfigFile;
-    /**
-      * Parse the text of the tsconfig.json file
-      * @param fileName The path to the config file
-      * @param jsonText The text of the config file
-      */
-    function parseConfigFileTextToJson(fileName, jsonText, stripComments) {
-        if (stripComments === void 0) { stripComments = true; }
-        try {
-            var jsonTextToParse = stripComments ? removeComments(jsonText) : jsonText;
-            return { config: /\S/.test(jsonTextToParse) ? JSON.parse(jsonTextToParse) : {} };
-        }
-        catch (e) {
-            return { error: ts.createCompilerDiagnostic(ts.Diagnostics.Failed_to_parse_file_0_Colon_1, fileName, e.message) };
-        }
+    ts.createModuleDeclaration = createModuleDeclaration;
+    function updateModuleDeclaration(node, decorators, modifiers, name, body) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.name !== name
+            || node.body !== body
+            ? updateNode(createModuleDeclaration(decorators, modifiers, name, body, node.flags), node)
+            : node;
     }
-    ts.parseConfigFileTextToJson = parseConfigFileTextToJson;
-    /**
-     * Generate tsconfig configuration when running command line "--init"
-     * @param options commandlineOptions to be generated into tsconfig.json
-     * @param fileNames array of filenames to be generated into tsconfig.json
-     */
-    /* @internal */
-    function generateTSConfig(options, fileNames) {
-        var compilerOptions = ts.extend(options, ts.defaultInitCompilerOptions);
-        var configurations = {
-            compilerOptions: serializeCompilerOptions(compilerOptions)
-        };
-        if (fileNames && fileNames.length) {
-            // only set the files property if we have at least one file
-            configurations.files = fileNames;
-        }
-        return configurations;
-        function getCustomTypeMapOfCommandLineOption(optionDefinition) {
-            if (optionDefinition.type === "string" || optionDefinition.type === "number" || optionDefinition.type === "boolean") {
-                // this is of a type CommandLineOptionOfPrimitiveType
-                return undefined;
-            }
-            else if (optionDefinition.type === "list") {
-                return getCustomTypeMapOfCommandLineOption(optionDefinition.element);
-            }
-            else {
-                return optionDefinition.type;
-            }
-        }
-        function getNameOfCompilerOptionValue(value, customTypeMap) {
-            // There is a typeMap associated with this command-line option so use it to map value back to its name
-            for (var key in customTypeMap) {
-                if (customTypeMap[key] === value) {
-                    return key;
-                }
-            }
-            return undefined;
-        }
-        function serializeCompilerOptions(options) {
-            var result = ts.createMap();
-            var optionsNameMap = getOptionNameMap().optionNameMap;
-            for (var name_26 in options) {
-                if (ts.hasProperty(options, name_26)) {
-                    // tsconfig only options cannot be specified via command line,
-                    // so we can assume that only types that can appear here string | number | boolean
-                    switch (name_26) {
-                        case "init":
-                        case "watch":
-                        case "version":
-                        case "help":
-                        case "project":
-                            break;
-                        default:
-                            var value = options[name_26];
-                            var optionDefinition = optionsNameMap[name_26.toLowerCase()];
-                            if (optionDefinition) {
-                                var customTypeMap = getCustomTypeMapOfCommandLineOption(optionDefinition);
-                                if (!customTypeMap) {
-                                    // There is no map associated with this compiler option then use the value as-is
-                                    // This is the case if the value is expect to be string, number, boolean or list of string
-                                    result[name_26] = value;
-                                }
-                                else {
-                                    if (optionDefinition.type === "list") {
-                                        var convertedValue = [];
-                                        for (var _i = 0, _a = value; _i < _a.length; _i++) {
-                                            var element = _a[_i];
-                                            convertedValue.push(getNameOfCompilerOptionValue(element, customTypeMap));
-                                        }
-                                        result[name_26] = convertedValue;
-                                    }
-                                    else {
-                                        // There is a typeMap associated with this command-line option so use it to map value back to its name
-                                        result[name_26] = getNameOfCompilerOptionValue(value, customTypeMap);
-                                    }
-                                }
-                            }
-                            break;
-                    }
-                }
-            }
-            return result;
-        }
+    ts.updateModuleDeclaration = updateModuleDeclaration;
+    function createModuleBlock(statements) {
+        var node = createSynthesizedNode(234 /* ModuleBlock */);
+        node.statements = createNodeArray(statements);
+        return node;
     }
-    ts.generateTSConfig = generateTSConfig;
-    /**
-     * Remove the comments from a json like text.
-     * Comments can be single line comments (starting with # or //) or multiline comments using / * * /
-     *
-     * This method replace comment content by whitespace rather than completely remove them to keep positions in json parsing error reporting accurate.
-     */
-    function removeComments(jsonText) {
-        var output = "";
-        var scanner = ts.createScanner(1 /* ES5 */, /* skipTrivia */ false, 0 /* Standard */, jsonText);
-        var token;
-        while ((token = scanner.scan()) !== 1 /* EndOfFileToken */) {
-            switch (token) {
-                case 2 /* SingleLineCommentTrivia */:
-                case 3 /* MultiLineCommentTrivia */:
-                    // replace comments with whitespace to preserve original character positions
-                    output += scanner.getTokenText().replace(/\S/g, " ");
-                    break;
-                default:
-                    output += scanner.getTokenText();
-                    break;
-            }
-        }
-        return output;
+    ts.createModuleBlock = createModuleBlock;
+    function updateModuleBlock(node, statements) {
+        return node.statements !== statements
+            ? updateNode(createModuleBlock(statements), node)
+            : node;
     }
-    /**
-      * Parse the contents of a config file (tsconfig.json).
-      * @param json The contents of the config file to parse
-      * @param host Instance of ParseConfigHost used to enumerate files in folder.
-      * @param basePath A root directory to resolve relative path entries in the config
-      *    file to. e.g. outDir
-      */
-    function parseJsonConfigFileContent(json, host, basePath, existingOptions, configFileName, resolutionStack) {
-        if (existingOptions === void 0) { existingOptions = {}; }
-        if (resolutionStack === void 0) { resolutionStack = []; }
-        var errors = [];
-        var getCanonicalFileName = ts.createGetCanonicalFileName(host.useCaseSensitiveFileNames);
-        var resolvedPath = ts.toPath(configFileName || "", basePath, getCanonicalFileName);
-        if (resolutionStack.indexOf(resolvedPath) >= 0) {
-            return {
-                options: {},
-                fileNames: [],
-                typingOptions: {},
-                raw: json,
-                errors: [ts.createCompilerDiagnostic(ts.Diagnostics.Circularity_detected_while_resolving_configuration_Colon_0, resolutionStack.concat([resolvedPath]).join(" -> "))],
-                wildcardDirectories: {}
-            };
-        }
-        var options = convertCompilerOptionsFromJsonWorker(json["compilerOptions"], basePath, errors, configFileName);
-        var typingOptions = convertTypingOptionsFromJsonWorker(json["typingOptions"], basePath, errors, configFileName);
-        if (json["extends"]) {
-            var _a = [undefined, undefined, undefined, {}], include = _a[0], exclude = _a[1], files = _a[2], baseOptions = _a[3];
-            if (typeof json["extends"] === "string") {
-                _b = (tryExtendsName(json["extends"]) || [include, exclude, files, baseOptions]), include = _b[0], exclude = _b[1], files = _b[2], baseOptions = _b[3];
-            }
-            else {
-                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1, "extends", "string"));
-            }
-            if (include && !json["include"]) {
-                json["include"] = include;
-            }
-            if (exclude && !json["exclude"]) {
-                json["exclude"] = exclude;
-            }
-            if (files && !json["files"]) {
-                json["files"] = files;
-            }
-            options = ts.assign({}, baseOptions, options);
-        }
-        options = ts.extend(existingOptions, options);
-        options.configFilePath = configFileName;
-        var _c = getFileNames(errors), fileNames = _c.fileNames, wildcardDirectories = _c.wildcardDirectories;
-        var compileOnSave = convertCompileOnSaveOptionFromJson(json, basePath, errors);
-        return {
-            options: options,
-            fileNames: fileNames,
-            typingOptions: typingOptions,
-            raw: json,
-            errors: errors,
-            wildcardDirectories: wildcardDirectories,
-            compileOnSave: compileOnSave
-        };
-        function tryExtendsName(extendedConfig) {
-            // If the path isn't a rooted or relative path, don't try to resolve it (we reserve the right to special case module-id like paths in the future)
-            if (!(ts.isRootedDiskPath(extendedConfig) || ts.startsWith(ts.normalizeSlashes(extendedConfig), "./") || ts.startsWith(ts.normalizeSlashes(extendedConfig), "../"))) {
-                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.The_path_in_an_extends_options_must_be_relative_or_rooted));
-                return;
-            }
-            var extendedConfigPath = ts.toPath(extendedConfig, basePath, getCanonicalFileName);
-            if (!host.fileExists(extendedConfigPath) && !ts.endsWith(extendedConfigPath, ".json")) {
-                extendedConfigPath = extendedConfigPath + ".json";
-                if (!host.fileExists(extendedConfigPath)) {
-                    errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.File_0_does_not_exist, extendedConfig));
-                    return;
-                }
-            }
-            var extendedResult = readConfigFile(extendedConfigPath, function (path) { return host.readFile(path); });
-            if (extendedResult.error) {
-                errors.push(extendedResult.error);
-                return;
-            }
-            var extendedDirname = ts.getDirectoryPath(extendedConfigPath);
-            var relativeDifference = ts.convertToRelativePath(extendedDirname, basePath, getCanonicalFileName);
-            var updatePath = function (path) { return ts.isRootedDiskPath(path) ? path : ts.combinePaths(relativeDifference, path); };
-            // Merge configs (copy the resolution stack so it is never reused between branches in potential diamond-problem scenarios)
-            var result = parseJsonConfigFileContent(extendedResult.config, host, extendedDirname, /*existingOptions*/ undefined, ts.getBaseFileName(extendedConfigPath), resolutionStack.concat([resolvedPath]));
-            errors.push.apply(errors, result.errors);
-            var _a = ts.map(["include", "exclude", "files"], function (key) {
-                if (!json[key] && extendedResult.config[key]) {
-                    return ts.map(extendedResult.config[key], updatePath);
-                }
-            }), include = _a[0], exclude = _a[1], files = _a[2];
-            return [include, exclude, files, result.options];
-        }
-        function getFileNames(errors) {
-            var fileNames;
-            if (ts.hasProperty(json, "files")) {
-                if (ts.isArray(json["files"])) {
-                    fileNames = json["files"];
-                }
-                else {
-                    errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1, "files", "Array"));
-                }
-            }
-            var includeSpecs;
-            if (ts.hasProperty(json, "include")) {
-                if (ts.isArray(json["include"])) {
-                    includeSpecs = json["include"];
-                }
-                else {
-                    errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1, "include", "Array"));
-                }
-            }
-            var excludeSpecs;
-            if (ts.hasProperty(json, "exclude")) {
-                if (ts.isArray(json["exclude"])) {
-                    excludeSpecs = json["exclude"];
-                }
-                else {
-                    errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1, "exclude", "Array"));
-                }
-            }
-            else if (ts.hasProperty(json, "excludes")) {
-                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unknown_option_excludes_Did_you_mean_exclude));
-            }
-            else {
-                // By default, exclude common package folders and the outDir
-                excludeSpecs = ["node_modules", "bower_components", "jspm_packages"];
-                var outDir = json["compilerOptions"] && json["compilerOptions"]["outDir"];
-                if (outDir) {
-                    excludeSpecs.push(outDir);
-                }
-            }
-            if (fileNames === undefined && includeSpecs === undefined) {
-                includeSpecs = ["**/*"];
-            }
-            return matchFileNames(fileNames, includeSpecs, excludeSpecs, basePath, options, host, errors);
-        }
-        var _b;
+    ts.updateModuleBlock = updateModuleBlock;
+    function createCaseBlock(clauses) {
+        var node = createSynthesizedNode(235 /* CaseBlock */);
+        node.clauses = createNodeArray(clauses);
+        return node;
     }
-    ts.parseJsonConfigFileContent = parseJsonConfigFileContent;
-    function convertCompileOnSaveOptionFromJson(jsonOption, basePath, errors) {
-        if (!ts.hasProperty(jsonOption, ts.compileOnSaveCommandLineOption.name)) {
-            return false;
-        }
-        var result = convertJsonOption(ts.compileOnSaveCommandLineOption, jsonOption["compileOnSave"], basePath, errors);
-        if (typeof result === "boolean" && result) {
-            return result;
-        }
-        return false;
+    ts.createCaseBlock = createCaseBlock;
+    function updateCaseBlock(node, clauses) {
+        return node.clauses !== clauses
+            ? updateNode(createCaseBlock(clauses), node)
+            : node;
     }
-    ts.convertCompileOnSaveOptionFromJson = convertCompileOnSaveOptionFromJson;
-    function convertCompilerOptionsFromJson(jsonOptions, basePath, configFileName) {
-        var errors = [];
-        var options = convertCompilerOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName);
-        return { options: options, errors: errors };
+    ts.updateCaseBlock = updateCaseBlock;
+    function createNamespaceExportDeclaration(name) {
+        var node = createSynthesizedNode(236 /* NamespaceExportDeclaration */);
+        node.name = asName(name);
+        return node;
     }
-    ts.convertCompilerOptionsFromJson = convertCompilerOptionsFromJson;
-    function convertTypingOptionsFromJson(jsonOptions, basePath, configFileName) {
-        var errors = [];
-        var options = convertTypingOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName);
-        return { options: options, errors: errors };
+    ts.createNamespaceExportDeclaration = createNamespaceExportDeclaration;
+    function updateNamespaceExportDeclaration(node, name) {
+        return node.name !== name
+            ? updateNode(createNamespaceExportDeclaration(name), node)
+            : node;
     }
-    ts.convertTypingOptionsFromJson = convertTypingOptionsFromJson;
-    function convertCompilerOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName) {
-        var options = ts.getBaseFileName(configFileName) === "jsconfig.json"
-            ? { allowJs: true, maxNodeModuleJsDepth: 2, allowSyntheticDefaultImports: true }
-            : {};
-        convertOptionsFromJson(ts.optionDeclarations, jsonOptions, basePath, options, ts.Diagnostics.Unknown_compiler_option_0, errors);
-        return options;
+    ts.updateNamespaceExportDeclaration = updateNamespaceExportDeclaration;
+    function createImportEqualsDeclaration(decorators, modifiers, name, moduleReference) {
+        var node = createSynthesizedNode(237 /* ImportEqualsDeclaration */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.name = asName(name);
+        node.moduleReference = moduleReference;
+        return node;
     }
-    function convertTypingOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName) {
-        var options = ts.getBaseFileName(configFileName) === "jsconfig.json"
-            ? { enableAutoDiscovery: true, include: [], exclude: [] }
-            : { enableAutoDiscovery: false, include: [], exclude: [] };
-        convertOptionsFromJson(ts.typingOptionDeclarations, jsonOptions, basePath, options, ts.Diagnostics.Unknown_typing_option_0, errors);
-        return options;
+    ts.createImportEqualsDeclaration = createImportEqualsDeclaration;
+    function updateImportEqualsDeclaration(node, decorators, modifiers, name, moduleReference) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.name !== name
+            || node.moduleReference !== moduleReference
+            ? updateNode(createImportEqualsDeclaration(decorators, modifiers, name, moduleReference), node)
+            : node;
     }
-    function convertOptionsFromJson(optionDeclarations, jsonOptions, basePath, defaultOptions, diagnosticMessage, errors) {
-        if (!jsonOptions) {
-            return;
-        }
-        var optionNameMap = ts.arrayToMap(optionDeclarations, function (opt) { return opt.name; });
-        for (var id in jsonOptions) {
-            if (id in optionNameMap) {
-                var opt = optionNameMap[id];
-                defaultOptions[opt.name] = convertJsonOption(opt, jsonOptions[id], basePath, errors);
-            }
-            else {
-                errors.push(ts.createCompilerDiagnostic(diagnosticMessage, id));
-            }
-        }
+    ts.updateImportEqualsDeclaration = updateImportEqualsDeclaration;
+    function createImportDeclaration(decorators, modifiers, importClause, moduleSpecifier) {
+        var node = createSynthesizedNode(238 /* ImportDeclaration */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.importClause = importClause;
+        node.moduleSpecifier = moduleSpecifier;
+        return node;
     }
-    function convertJsonOption(opt, value, basePath, errors) {
-        var optType = opt.type;
-        var expectedType = typeof optType === "string" ? optType : "string";
-        if (optType === "list" && ts.isArray(value)) {
-            return convertJsonOptionOfListType(opt, value, basePath, errors);
-        }
-        else if (typeof value === expectedType) {
-            if (typeof optType !== "string") {
-                return convertJsonOptionOfCustomType(opt, value, errors);
-            }
-            else {
-                if (opt.isFilePath) {
-                    value = ts.normalizePath(ts.combinePaths(basePath, value));
-                    if (value === "") {
-                        value = ".";
-                    }
-                }
-            }
-            return value;
-        }
-        else {
-            errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1, opt.name, expectedType));
-        }
+    ts.createImportDeclaration = createImportDeclaration;
+    function updateImportDeclaration(node, decorators, modifiers, importClause, moduleSpecifier) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.importClause !== importClause
+            || node.moduleSpecifier !== moduleSpecifier
+            ? updateNode(createImportDeclaration(decorators, modifiers, importClause, moduleSpecifier), node)
+            : node;
     }
-    function convertJsonOptionOfCustomType(opt, value, errors) {
-        var key = value.toLowerCase();
-        if (key in opt.type) {
-            return opt.type[key];
-        }
-        else {
-            errors.push(createCompilerDiagnosticForInvalidCustomType(opt));
-        }
+    ts.updateImportDeclaration = updateImportDeclaration;
+    function createImportClause(name, namedBindings) {
+        var node = createSynthesizedNode(239 /* ImportClause */);
+        node.name = name;
+        node.namedBindings = namedBindings;
+        return node;
     }
-    function convertJsonOptionOfListType(option, values, basePath, errors) {
-        return ts.filter(ts.map(values, function (v) { return convertJsonOption(option.element, v, basePath, errors); }), function (v) { return !!v; });
+    ts.createImportClause = createImportClause;
+    function updateImportClause(node, name, namedBindings) {
+        return node.name !== name
+            || node.namedBindings !== namedBindings
+            ? updateNode(createImportClause(name, namedBindings), node)
+            : node;
     }
-    function trimString(s) {
-        return typeof s.trim === "function" ? s.trim() : s.replace(/^[\s]+|[\s]+$/g, "");
+    ts.updateImportClause = updateImportClause;
+    function createNamespaceImport(name) {
+        var node = createSynthesizedNode(240 /* NamespaceImport */);
+        node.name = name;
+        return node;
     }
-    /**
-     * Tests for a path that ends in a recursive directory wildcard.
-     * Matches **, \**, **\, and \**\, but not a**b.
-     *
-     * NOTE: used \ in place of / above to avoid issues with multiline comments.
-     *
-     * Breakdown:
-     *  (^|\/)      # matches either the beginning of the string or a directory separator.
-     *  \*\*        # matches the recursive directory wildcard "**".
-     *  \/?$        # matches an optional trailing directory separator at the end of the string.
-     */
-    var invalidTrailingRecursionPattern = /(^|\/)\*\*\/?$/;
-    /**
-     * Tests for a path with multiple recursive directory wildcards.
-     * Matches **\** and **\a\**, but not **\a**b.
-     *
-     * NOTE: used \ in place of / above to avoid issues with multiline comments.
-     *
-     * Breakdown:
-     *  (^|\/)      # matches either the beginning of the string or a directory separator.
-     *  \*\*\/      # matches a recursive directory wildcard "**" followed by a directory separator.
-     *  (.*\/)?     # optionally matches any number of characters followed by a directory separator.
-     *  \*\*        # matches a recursive directory wildcard "**"
-     *  ($|\/)      # matches either the end of the string or a directory separator.
-     */
-    var invalidMultipleRecursionPatterns = /(^|\/)\*\*\/(.*\/)?\*\*($|\/)/;
-    /**
-     * Tests for a path where .. appears after a recursive directory wildcard.
-     * Matches **\..\*, **\a\..\*, and **\.., but not ..\**\*
-     *
-     * NOTE: used \ in place of / above to avoid issues with multiline comments.
-     *
-     * Breakdown:
-     *  (^|\/)      # matches either the beginning of the string or a directory separator.
-     *  \*\*\/      # matches a recursive directory wildcard "**" followed by a directory separator.
-     *  (.*\/)?     # optionally matches any number of characters followed by a directory separator.
-     *  \.\.        # matches a parent directory path component ".."
-     *  ($|\/)      # matches either the end of the string or a directory separator.
-     */
-    var invalidDotDotAfterRecursiveWildcardPattern = /(^|\/)\*\*\/(.*\/)?\.\.($|\/)/;
-    /**
-     * Tests for a path containing a wildcard character in a directory component of the path.
-     * Matches \*\, \?\, and \a*b\, but not \a\ or \a\*.
-     *
-     * NOTE: used \ in place of / above to avoid issues with multiline comments.
-     *
-     * Breakdown:
-     *  \/          # matches a directory separator.
-     *  [^/]*?      # matches any number of characters excluding directory separators (non-greedy).
-     *  [*?]        # matches either a wildcard character (* or ?)
-     *  [^/]*       # matches any number of characters excluding directory separators (greedy).
-     *  \/          # matches a directory separator.
-     */
-    var watchRecursivePattern = /\/[^/]*?[*?][^/]*\//;
-    /**
-     * Matches the portion of a wildcard path that does not contain wildcards.
-     * Matches \a of \a\*, or \a\b\c of \a\b\c\?\d.
-     *
-     * NOTE: used \ in place of / above to avoid issues with multiline comments.
-     *
-     * Breakdown:
-     *  ^                   # matches the beginning of the string
-     *  [^*?]*              # matches any number of non-wildcard characters
-     *  (?=\/[^/]*[*?])     # lookahead that matches a directory separator followed by
-     *                      # a path component that contains at least one wildcard character (* or ?).
-     */
-    var wildcardDirectoryPattern = /^[^*?]*(?=\/[^/]*[*?])/;
-    /**
-     * Expands an array of file specifications.
-     *
-     * @param fileNames The literal file names to include.
-     * @param include The wildcard file specifications to include.
-     * @param exclude The wildcard file specifications to exclude.
-     * @param basePath The base path for any relative file specifications.
-     * @param options Compiler options.
-     * @param host The host used to resolve files and directories.
-     * @param errors An array for diagnostic reporting.
-     */
-    function matchFileNames(fileNames, include, exclude, basePath, options, host, errors) {
-        basePath = ts.normalizePath(basePath);
-        // The exclude spec list is converted into a regular expression, which allows us to quickly
-        // test whether a file or directory should be excluded before recursively traversing the
-        // file system.
-        var keyMapper = host.useCaseSensitiveFileNames ? caseSensitiveKeyMapper : caseInsensitiveKeyMapper;
-        // Literal file names (provided via the "files" array in tsconfig.json) are stored in a
-        // file map with a possibly case insensitive key. We use this map later when when including
-        // wildcard paths.
-        var literalFileMap = ts.createMap();
-        // Wildcard paths (provided via the "includes" array in tsconfig.json) are stored in a
-        // file map with a possibly case insensitive key. We use this map to store paths matched
-        // via wildcard, and to handle extension priority.
-        var wildcardFileMap = ts.createMap();
-        if (include) {
-            include = validateSpecs(include, errors, /*allowTrailingRecursion*/ false);
-        }
-        if (exclude) {
-            exclude = validateSpecs(exclude, errors, /*allowTrailingRecursion*/ true);
-        }
-        // Wildcard directories (provided as part of a wildcard path) are stored in a
-        // file map that marks whether it was a regular wildcard match (with a `*` or `?` token),
-        // or a recursive directory. This information is used by filesystem watchers to monitor for
-        // new entries in these paths.
-        var wildcardDirectories = getWildcardDirectories(include, exclude, basePath, host.useCaseSensitiveFileNames);
-        // Rather than requery this for each file and filespec, we query the supported extensions
-        // once and store it on the expansion context.
-        var supportedExtensions = ts.getSupportedExtensions(options);
-        // Literal files are always included verbatim. An "include" or "exclude" specification cannot
-        // remove a literal file.
-        if (fileNames) {
-            for (var _i = 0, fileNames_1 = fileNames; _i < fileNames_1.length; _i++) {
-                var fileName = fileNames_1[_i];
-                var file = ts.combinePaths(basePath, fileName);
-                literalFileMap[keyMapper(file)] = file;
-            }
-        }
-        if (include && include.length > 0) {
-            for (var _a = 0, _b = host.readDirectory(basePath, supportedExtensions, exclude, include); _a < _b.length; _a++) {
-                var file = _b[_a];
-                // If we have already included a literal or wildcard path with a
-                // higher priority extension, we should skip this file.
-                //
-                // This handles cases where we may encounter both <file>.ts and
-                // <file>.d.ts (or <file>.js if "allowJs" is enabled) in the same
-                // directory when they are compilation outputs.
-                if (hasFileWithHigherPriorityExtension(file, literalFileMap, wildcardFileMap, supportedExtensions, keyMapper)) {
-                    continue;
-                }
-                // We may have included a wildcard path with a lower priority
-                // extension due to the user-defined order of entries in the
-                // "include" array. If there is a lower priority extension in the
-                // same directory, we should remove it.
-                removeWildcardFilesWithLowerPriorityExtension(file, wildcardFileMap, supportedExtensions, keyMapper);
-                var key = keyMapper(file);
-                if (!(key in literalFileMap) && !(key in wildcardFileMap)) {
-                    wildcardFileMap[key] = file;
-                }
-            }
-        }
-        var literalFiles = ts.reduceProperties(literalFileMap, addFileToOutput, []);
-        var wildcardFiles = ts.reduceProperties(wildcardFileMap, addFileToOutput, []);
-        wildcardFiles.sort(host.useCaseSensitiveFileNames ? ts.compareStrings : ts.compareStringsCaseInsensitive);
-        return {
-            fileNames: literalFiles.concat(wildcardFiles),
-            wildcardDirectories: wildcardDirectories
-        };
+    ts.createNamespaceImport = createNamespaceImport;
+    function updateNamespaceImport(node, name) {
+        return node.name !== name
+            ? updateNode(createNamespaceImport(name), node)
+            : node;
     }
-    function validateSpecs(specs, errors, allowTrailingRecursion) {
-        var validSpecs = [];
-        for (var _i = 0, specs_2 = specs; _i < specs_2.length; _i++) {
-            var spec = specs_2[_i];
-            if (!allowTrailingRecursion && invalidTrailingRecursionPattern.test(spec)) {
-                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.File_specification_cannot_end_in_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0, spec));
-            }
-            else if (invalidMultipleRecursionPatterns.test(spec)) {
-                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.File_specification_cannot_contain_multiple_recursive_directory_wildcards_Asterisk_Asterisk_Colon_0, spec));
-            }
-            else if (invalidDotDotAfterRecursiveWildcardPattern.test(spec)) {
-                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.File_specification_cannot_contain_a_parent_directory_that_appears_after_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0, spec));
-            }
-            else {
-                validSpecs.push(spec);
-            }
-        }
-        return validSpecs;
+    ts.updateNamespaceImport = updateNamespaceImport;
+    function createNamedImports(elements) {
+        var node = createSynthesizedNode(241 /* NamedImports */);
+        node.elements = createNodeArray(elements);
+        return node;
     }
-    /**
-     * Gets directories in a set of include patterns that should be watched for changes.
-     */
-    function getWildcardDirectories(include, exclude, path, useCaseSensitiveFileNames) {
-        // We watch a directory recursively if it contains a wildcard anywhere in a directory segment
-        // of the pattern:
-        //
-        //  /a/b/**/d   - Watch /a/b recursively to catch changes to any d in any subfolder recursively
-        //  /a/b/*/d    - Watch /a/b recursively to catch any d in any immediate subfolder, even if a new subfolder is added
-        //
-        // We watch a directory without recursion if it contains a wildcard in the file segment of
-        // the pattern:
-        //
-        //  /a/b/*      - Watch /a/b directly to catch any new file
-        //  /a/b/a?z    - Watch /a/b directly to catch any new file matching a?z
-        var rawExcludeRegex = ts.getRegularExpressionForWildcard(exclude, path, "exclude");
-        var excludeRegex = rawExcludeRegex && new RegExp(rawExcludeRegex, useCaseSensitiveFileNames ? "" : "i");
-        var wildcardDirectories = ts.createMap();
-        if (include !== undefined) {
-            var recursiveKeys = [];
-            for (var _i = 0, include_1 = include; _i < include_1.length; _i++) {
-                var file = include_1[_i];
-                var name_27 = ts.normalizePath(ts.combinePaths(path, file));
-                if (excludeRegex && excludeRegex.test(name_27)) {
-                    continue;
-                }
-                var match = wildcardDirectoryPattern.exec(name_27);
-                if (match) {
-                    var key = useCaseSensitiveFileNames ? match[0] : match[0].toLowerCase();
-                    var flags = watchRecursivePattern.test(name_27) ? 1 /* Recursive */ : 0 /* None */;
-                    var existingFlags = wildcardDirectories[key];
-                    if (existingFlags === undefined || existingFlags < flags) {
-                        wildcardDirectories[key] = flags;
-                        if (flags === 1 /* Recursive */) {
-                            recursiveKeys.push(key);
-                        }
-                    }
-                }
-            }
-            // Remove any subpaths under an existing recursively watched directory.
-            for (var key in wildcardDirectories) {
-                for (var _a = 0, recursiveKeys_1 = recursiveKeys; _a < recursiveKeys_1.length; _a++) {
-                    var recursiveKey = recursiveKeys_1[_a];
-                    if (key !== recursiveKey && ts.containsPath(recursiveKey, key, path, !useCaseSensitiveFileNames)) {
-                        delete wildcardDirectories[key];
-                    }
-                }
-            }
-        }
-        return wildcardDirectories;
+    ts.createNamedImports = createNamedImports;
+    function updateNamedImports(node, elements) {
+        return node.elements !== elements
+            ? updateNode(createNamedImports(elements), node)
+            : node;
+    }
+    ts.updateNamedImports = updateNamedImports;
+    function createImportSpecifier(propertyName, name) {
+        var node = createSynthesizedNode(242 /* ImportSpecifier */);
+        node.propertyName = propertyName;
+        node.name = name;
+        return node;
+    }
+    ts.createImportSpecifier = createImportSpecifier;
+    function updateImportSpecifier(node, propertyName, name) {
+        return node.propertyName !== propertyName
+            || node.name !== name
+            ? updateNode(createImportSpecifier(propertyName, name), node)
+            : node;
+    }
+    ts.updateImportSpecifier = updateImportSpecifier;
+    function createExportAssignment(decorators, modifiers, isExportEquals, expression) {
+        var node = createSynthesizedNode(243 /* ExportAssignment */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.isExportEquals = isExportEquals;
+        node.expression = expression;
+        return node;
+    }
+    ts.createExportAssignment = createExportAssignment;
+    function updateExportAssignment(node, decorators, modifiers, expression) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.expression !== expression
+            ? updateNode(createExportAssignment(decorators, modifiers, node.isExportEquals, expression), node)
+            : node;
+    }
+    ts.updateExportAssignment = updateExportAssignment;
+    function createExportDeclaration(decorators, modifiers, exportClause, moduleSpecifier) {
+        var node = createSynthesizedNode(244 /* ExportDeclaration */);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.exportClause = exportClause;
+        node.moduleSpecifier = moduleSpecifier;
+        return node;
+    }
+    ts.createExportDeclaration = createExportDeclaration;
+    function updateExportDeclaration(node, decorators, modifiers, exportClause, moduleSpecifier) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.exportClause !== exportClause
+            || node.moduleSpecifier !== moduleSpecifier
+            ? updateNode(createExportDeclaration(decorators, modifiers, exportClause, moduleSpecifier), node)
+            : node;
+    }
+    ts.updateExportDeclaration = updateExportDeclaration;
+    function createNamedExports(elements) {
+        var node = createSynthesizedNode(245 /* NamedExports */);
+        node.elements = createNodeArray(elements);
+        return node;
+    }
+    ts.createNamedExports = createNamedExports;
+    function updateNamedExports(node, elements) {
+        return node.elements !== elements
+            ? updateNode(createNamedExports(elements), node)
+            : node;
+    }
+    ts.updateNamedExports = updateNamedExports;
+    function createExportSpecifier(propertyName, name) {
+        var node = createSynthesizedNode(246 /* ExportSpecifier */);
+        node.propertyName = asName(propertyName);
+        node.name = asName(name);
+        return node;
+    }
+    ts.createExportSpecifier = createExportSpecifier;
+    function updateExportSpecifier(node, propertyName, name) {
+        return node.propertyName !== propertyName
+            || node.name !== name
+            ? updateNode(createExportSpecifier(propertyName, name), node)
+            : node;
+    }
+    ts.updateExportSpecifier = updateExportSpecifier;
+    // Module references
+    function createExternalModuleReference(expression) {
+        var node = createSynthesizedNode(248 /* ExternalModuleReference */);
+        node.expression = expression;
+        return node;
+    }
+    ts.createExternalModuleReference = createExternalModuleReference;
+    function updateExternalModuleReference(node, expression) {
+        return node.expression !== expression
+            ? updateNode(createExternalModuleReference(expression), node)
+            : node;
+    }
+    ts.updateExternalModuleReference = updateExternalModuleReference;
+    // JSX
+    function createJsxElement(openingElement, children, closingElement) {
+        var node = createSynthesizedNode(249 /* JsxElement */);
+        node.openingElement = openingElement;
+        node.children = createNodeArray(children);
+        node.closingElement = closingElement;
+        return node;
+    }
+    ts.createJsxElement = createJsxElement;
+    function updateJsxElement(node, openingElement, children, closingElement) {
+        return node.openingElement !== openingElement
+            || node.children !== children
+            || node.closingElement !== closingElement
+            ? updateNode(createJsxElement(openingElement, children, closingElement), node)
+            : node;
+    }
+    ts.updateJsxElement = updateJsxElement;
+    function createJsxSelfClosingElement(tagName, attributes) {
+        var node = createSynthesizedNode(250 /* JsxSelfClosingElement */);
+        node.tagName = tagName;
+        node.attributes = attributes;
+        return node;
+    }
+    ts.createJsxSelfClosingElement = createJsxSelfClosingElement;
+    function updateJsxSelfClosingElement(node, tagName, attributes) {
+        return node.tagName !== tagName
+            || node.attributes !== attributes
+            ? updateNode(createJsxSelfClosingElement(tagName, attributes), node)
+            : node;
+    }
+    ts.updateJsxSelfClosingElement = updateJsxSelfClosingElement;
+    function createJsxOpeningElement(tagName, attributes) {
+        var node = createSynthesizedNode(251 /* JsxOpeningElement */);
+        node.tagName = tagName;
+        node.attributes = attributes;
+        return node;
+    }
+    ts.createJsxOpeningElement = createJsxOpeningElement;
+    function updateJsxOpeningElement(node, tagName, attributes) {
+        return node.tagName !== tagName
+            || node.attributes !== attributes
+            ? updateNode(createJsxOpeningElement(tagName, attributes), node)
+            : node;
+    }
+    ts.updateJsxOpeningElement = updateJsxOpeningElement;
+    function createJsxClosingElement(tagName) {
+        var node = createSynthesizedNode(252 /* JsxClosingElement */);
+        node.tagName = tagName;
+        return node;
+    }
+    ts.createJsxClosingElement = createJsxClosingElement;
+    function updateJsxClosingElement(node, tagName) {
+        return node.tagName !== tagName
+            ? updateNode(createJsxClosingElement(tagName), node)
+            : node;
     }
-    /**
-     * Determines whether a literal or wildcard file has already been included that has a higher
-     * extension priority.
-     *
-     * @param file The path to the file.
-     * @param extensionPriority The priority of the extension.
-     * @param context The expansion context.
-     */
-    function hasFileWithHigherPriorityExtension(file, literalFiles, wildcardFiles, extensions, keyMapper) {
-        var extensionPriority = ts.getExtensionPriority(file, extensions);
-        var adjustedExtensionPriority = ts.adjustExtensionPriority(extensionPriority);
-        for (var i = 0 /* Highest */; i < adjustedExtensionPriority; i++) {
-            var higherPriorityExtension = extensions[i];
-            var higherPriorityPath = keyMapper(ts.changeExtension(file, higherPriorityExtension));
-            if (higherPriorityPath in literalFiles || higherPriorityPath in wildcardFiles) {
-                return true;
-            }
-        }
-        return false;
+    ts.updateJsxClosingElement = updateJsxClosingElement;
+    function createJsxAttribute(name, initializer) {
+        var node = createSynthesizedNode(253 /* JsxAttribute */);
+        node.name = name;
+        node.initializer = initializer;
+        return node;
     }
-    /**
-     * Removes files included via wildcard expansion with a lower extension priority that have
-     * already been included.
-     *
-     * @param file The path to the file.
-     * @param extensionPriority The priority of the extension.
-     * @param context The expansion context.
-     */
-    function removeWildcardFilesWithLowerPriorityExtension(file, wildcardFiles, extensions, keyMapper) {
-        var extensionPriority = ts.getExtensionPriority(file, extensions);
-        var nextExtensionPriority = ts.getNextLowestExtensionPriority(extensionPriority);
-        for (var i = nextExtensionPriority; i < extensions.length; i++) {
-            var lowerPriorityExtension = extensions[i];
-            var lowerPriorityPath = keyMapper(ts.changeExtension(file, lowerPriorityExtension));
-            delete wildcardFiles[lowerPriorityPath];
-        }
+    ts.createJsxAttribute = createJsxAttribute;
+    function updateJsxAttribute(node, name, initializer) {
+        return node.name !== name
+            || node.initializer !== initializer
+            ? updateNode(createJsxAttribute(name, initializer), node)
+            : node;
     }
-    /**
-     * Adds a file to an array of files.
-     *
-     * @param output The output array.
-     * @param file The file path.
-     */
-    function addFileToOutput(output, file) {
-        output.push(file);
-        return output;
+    ts.updateJsxAttribute = updateJsxAttribute;
+    function createJsxAttributes(properties) {
+        var node = createSynthesizedNode(254 /* JsxAttributes */);
+        node.properties = createNodeArray(properties);
+        return node;
     }
-    /**
-     * Gets a case sensitive key.
-     *
-     * @param key The original key.
-     */
-    function caseSensitiveKeyMapper(key) {
-        return key;
+    ts.createJsxAttributes = createJsxAttributes;
+    function updateJsxAttributes(node, properties) {
+        return node.properties !== properties
+            ? updateNode(createJsxAttributes(properties), node)
+            : node;
     }
-    /**
-     * Gets a case insensitive key.
-     *
-     * @param key The original key.
-     */
-    function caseInsensitiveKeyMapper(key) {
-        return key.toLowerCase();
+    ts.updateJsxAttributes = updateJsxAttributes;
+    function createJsxSpreadAttribute(expression) {
+        var node = createSynthesizedNode(255 /* JsxSpreadAttribute */);
+        node.expression = expression;
+        return node;
     }
-})(ts || (ts = {}));
-/// <reference path="checker.ts"/>
-/* @internal */
-var ts;
-(function (ts) {
-    function getDeclarationDiagnostics(host, resolver, targetSourceFile) {
-        var declarationDiagnostics = ts.createDiagnosticCollection();
-        ts.forEachExpectedEmitFile(host, getDeclarationDiagnosticsFromFile, targetSourceFile);
-        return declarationDiagnostics.getDiagnostics(targetSourceFile ? targetSourceFile.fileName : undefined);
-        function getDeclarationDiagnosticsFromFile(_a, sources, isBundledEmit) {
-            var declarationFilePath = _a.declarationFilePath;
-            emitDeclarations(host, resolver, declarationDiagnostics, declarationFilePath, sources, isBundledEmit, /*emitOnlyDtsFiles*/ false);
-        }
+    ts.createJsxSpreadAttribute = createJsxSpreadAttribute;
+    function updateJsxSpreadAttribute(node, expression) {
+        return node.expression !== expression
+            ? updateNode(createJsxSpreadAttribute(expression), node)
+            : node;
     }
-    ts.getDeclarationDiagnostics = getDeclarationDiagnostics;
-    function emitDeclarations(host, resolver, emitterDiagnostics, declarationFilePath, sourceFiles, isBundledEmit, emitOnlyDtsFiles) {
-        var newLine = host.getNewLine();
-        var compilerOptions = host.getCompilerOptions();
-        var write;
-        var writeLine;
-        var increaseIndent;
-        var decreaseIndent;
-        var writeTextOfNode;
-        var writer;
-        createAndSetNewTextWriterWithSymbolWriter();
-        var enclosingDeclaration;
-        var resultHasExternalModuleIndicator;
-        var currentText;
-        var currentLineMap;
-        var currentIdentifiers;
-        var isCurrentFileExternalModule;
-        var reportedDeclarationError = false;
-        var errorNameNode;
-        var emitJsDocComments = compilerOptions.removeComments ? function (declaration) { } : writeJsDocComments;
-        var emit = compilerOptions.stripInternal ? stripInternal : emitNode;
-        var noDeclare;
-        var moduleElementDeclarationEmitInfo = [];
-        var asynchronousSubModuleDeclarationEmitInfo;
-        // Contains the reference paths that needs to go in the declaration file.
-        // Collecting this separately because reference paths need to be first thing in the declaration file
-        // and we could be collecting these paths from multiple files into single one with --out option
-        var referencesOutput = "";
-        var usedTypeDirectiveReferences;
-        // Emit references corresponding to each file
-        var emittedReferencedFiles = [];
-        var addedGlobalFileReference = false;
-        var allSourcesModuleElementDeclarationEmitInfo = [];
-        ts.forEach(sourceFiles, function (sourceFile) {
-            // Dont emit for javascript file
-            if (ts.isSourceFileJavaScript(sourceFile)) {
-                return;
-            }
-            // Check what references need to be added
-            if (!compilerOptions.noResolve) {
-                ts.forEach(sourceFile.referencedFiles, function (fileReference) {
-                    var referencedFile = ts.tryResolveScriptReference(host, sourceFile, fileReference);
-                    // Emit reference in dts, if the file reference was not already emitted
-                    if (referencedFile && !ts.contains(emittedReferencedFiles, referencedFile)) {
-                        // Add a reference to generated dts file,
-                        // global file reference is added only
-                        //  - if it is not bundled emit (because otherwise it would be self reference)
-                        //  - and it is not already added
-                        if (writeReferencePath(referencedFile, !isBundledEmit && !addedGlobalFileReference, emitOnlyDtsFiles)) {
-                            addedGlobalFileReference = true;
-                        }
-                        emittedReferencedFiles.push(referencedFile);
-                    }
-                });
-            }
-            resultHasExternalModuleIndicator = false;
-            if (!isBundledEmit || !ts.isExternalModule(sourceFile)) {
-                noDeclare = false;
-                emitSourceFile(sourceFile);
-            }
-            else if (ts.isExternalModule(sourceFile)) {
-                noDeclare = true;
-                write("declare module \"" + ts.getResolvedExternalModuleName(host, sourceFile) + "\" {");
-                writeLine();
-                increaseIndent();
-                emitSourceFile(sourceFile);
-                decreaseIndent();
-                write("}");
-                writeLine();
-            }
-            // create asynchronous output for the importDeclarations
-            if (moduleElementDeclarationEmitInfo.length) {
-                var oldWriter = writer;
-                ts.forEach(moduleElementDeclarationEmitInfo, function (aliasEmitInfo) {
-                    if (aliasEmitInfo.isVisible && !aliasEmitInfo.asynchronousOutput) {
-                        ts.Debug.assert(aliasEmitInfo.node.kind === 230 /* ImportDeclaration */);
-                        createAndSetNewTextWriterWithSymbolWriter();
-                        ts.Debug.assert(aliasEmitInfo.indent === 0 || (aliasEmitInfo.indent === 1 && isBundledEmit));
-                        for (var i = 0; i < aliasEmitInfo.indent; i++) {
-                            increaseIndent();
-                        }
-                        writeImportDeclaration(aliasEmitInfo.node);
-                        aliasEmitInfo.asynchronousOutput = writer.getText();
-                        for (var i = 0; i < aliasEmitInfo.indent; i++) {
-                            decreaseIndent();
-                        }
-                    }
-                });
-                setWriter(oldWriter);
-                allSourcesModuleElementDeclarationEmitInfo = allSourcesModuleElementDeclarationEmitInfo.concat(moduleElementDeclarationEmitInfo);
-                moduleElementDeclarationEmitInfo = [];
-            }
-            if (!isBundledEmit && ts.isExternalModule(sourceFile) && sourceFile.moduleAugmentations.length && !resultHasExternalModuleIndicator) {
-                // if file was external module with augmentations - this fact should be preserved in .d.ts as well.
-                // in case if we didn't write any external module specifiers in .d.ts we need to emit something
-                // that will force compiler to think that this file is an external module - 'export {}' is a reasonable choice here.
-                write("export {};");
-                writeLine();
-            }
-        });
-        if (usedTypeDirectiveReferences) {
-            for (var directive in usedTypeDirectiveReferences) {
-                referencesOutput += "/// <reference types=\"" + directive + "\" />" + newLine;
-            }
-        }
-        return {
-            reportedDeclarationError: reportedDeclarationError,
-            moduleElementDeclarationEmitInfo: allSourcesModuleElementDeclarationEmitInfo,
-            synchronousDeclarationOutput: writer.getText(),
-            referencesOutput: referencesOutput,
-        };
-        function hasInternalAnnotation(range) {
-            var comment = currentText.substring(range.pos, range.end);
-            return comment.indexOf("@internal") >= 0;
-        }
-        function stripInternal(node) {
-            if (node) {
-                var leadingCommentRanges = ts.getLeadingCommentRanges(currentText, node.pos);
-                if (ts.forEach(leadingCommentRanges, hasInternalAnnotation)) {
-                    return;
-                }
-                emitNode(node);
-            }
-        }
-        function createAndSetNewTextWriterWithSymbolWriter() {
-            var writer = ts.createTextWriter(newLine);
-            writer.trackSymbol = trackSymbol;
-            writer.reportInaccessibleThisError = reportInaccessibleThisError;
-            writer.writeKeyword = writer.write;
-            writer.writeOperator = writer.write;
-            writer.writePunctuation = writer.write;
-            writer.writeSpace = writer.write;
-            writer.writeStringLiteral = writer.writeLiteral;
-            writer.writeParameter = writer.write;
-            writer.writeSymbol = writer.write;
-            setWriter(writer);
-        }
-        function setWriter(newWriter) {
-            writer = newWriter;
-            write = newWriter.write;
-            writeTextOfNode = newWriter.writeTextOfNode;
-            writeLine = newWriter.writeLine;
-            increaseIndent = newWriter.increaseIndent;
-            decreaseIndent = newWriter.decreaseIndent;
-        }
-        function writeAsynchronousModuleElements(nodes) {
-            var oldWriter = writer;
-            ts.forEach(nodes, function (declaration) {
-                var nodeToCheck;
-                if (declaration.kind === 218 /* VariableDeclaration */) {
-                    nodeToCheck = declaration.parent.parent;
-                }
-                else if (declaration.kind === 233 /* NamedImports */ || declaration.kind === 234 /* ImportSpecifier */ || declaration.kind === 231 /* ImportClause */) {
-                    ts.Debug.fail("We should be getting ImportDeclaration instead to write");
-                }
-                else {
-                    nodeToCheck = declaration;
-                }
-                var moduleElementEmitInfo = ts.forEach(moduleElementDeclarationEmitInfo, function (declEmitInfo) { return declEmitInfo.node === nodeToCheck ? declEmitInfo : undefined; });
-                if (!moduleElementEmitInfo && asynchronousSubModuleDeclarationEmitInfo) {
-                    moduleElementEmitInfo = ts.forEach(asynchronousSubModuleDeclarationEmitInfo, function (declEmitInfo) { return declEmitInfo.node === nodeToCheck ? declEmitInfo : undefined; });
-                }
-                // If the alias was marked as not visible when we saw its declaration, we would have saved the aliasEmitInfo, but if we haven't yet visited the alias declaration
-                // then we don't need to write it at this point. We will write it when we actually see its declaration
-                // Eg.
-                // export function bar(a: foo.Foo) { }
-                // import foo = require("foo");
-                // Writing of function bar would mark alias declaration foo as visible but we haven't yet visited that declaration so do nothing,
-                // we would write alias foo declaration when we visit it since it would now be marked as visible
-                if (moduleElementEmitInfo) {
-                    if (moduleElementEmitInfo.node.kind === 230 /* ImportDeclaration */) {
-                        // we have to create asynchronous output only after we have collected complete information
-                        // because it is possible to enable multiple bindings as asynchronously visible
-                        moduleElementEmitInfo.isVisible = true;
-                    }
-                    else {
-                        createAndSetNewTextWriterWithSymbolWriter();
-                        for (var declarationIndent = moduleElementEmitInfo.indent; declarationIndent; declarationIndent--) {
-                            increaseIndent();
-                        }
-                        if (nodeToCheck.kind === 225 /* ModuleDeclaration */) {
-                            ts.Debug.assert(asynchronousSubModuleDeclarationEmitInfo === undefined);
-                            asynchronousSubModuleDeclarationEmitInfo = [];
-                        }
-                        writeModuleElement(nodeToCheck);
-                        if (nodeToCheck.kind === 225 /* ModuleDeclaration */) {
-                            moduleElementEmitInfo.subModuleElementDeclarationEmitInfo = asynchronousSubModuleDeclarationEmitInfo;
-                            asynchronousSubModuleDeclarationEmitInfo = undefined;
-                        }
-                        moduleElementEmitInfo.asynchronousOutput = writer.getText();
-                    }
-                }
-            });
-            setWriter(oldWriter);
-        }
-        function recordTypeReferenceDirectivesIfNecessary(typeReferenceDirectives) {
-            if (!typeReferenceDirectives) {
-                return;
-            }
-            if (!usedTypeDirectiveReferences) {
-                usedTypeDirectiveReferences = ts.createMap();
-            }
-            for (var _i = 0, typeReferenceDirectives_1 = typeReferenceDirectives; _i < typeReferenceDirectives_1.length; _i++) {
-                var directive = typeReferenceDirectives_1[_i];
-                if (!(directive in usedTypeDirectiveReferences)) {
-                    usedTypeDirectiveReferences[directive] = directive;
-                }
-            }
-        }
-        function handleSymbolAccessibilityError(symbolAccessibilityResult) {
-            if (symbolAccessibilityResult.accessibility === 0 /* Accessible */) {
-                // write the aliases
-                if (symbolAccessibilityResult && symbolAccessibilityResult.aliasesToMakeVisible) {
-                    writeAsynchronousModuleElements(symbolAccessibilityResult.aliasesToMakeVisible);
-                }
-            }
-            else {
-                // Report error
-                reportedDeclarationError = true;
-                var errorInfo = writer.getSymbolAccessibilityDiagnostic(symbolAccessibilityResult);
-                if (errorInfo) {
-                    if (errorInfo.typeName) {
-                        emitterDiagnostics.add(ts.createDiagnosticForNode(symbolAccessibilityResult.errorNode || errorInfo.errorNode, errorInfo.diagnosticMessage, ts.getTextOfNodeFromSourceText(currentText, errorInfo.typeName), symbolAccessibilityResult.errorSymbolName, symbolAccessibilityResult.errorModuleName));
-                    }
-                    else {
-                        emitterDiagnostics.add(ts.createDiagnosticForNode(symbolAccessibilityResult.errorNode || errorInfo.errorNode, errorInfo.diagnosticMessage, symbolAccessibilityResult.errorSymbolName, symbolAccessibilityResult.errorModuleName));
-                    }
-                }
-            }
-        }
-        function trackSymbol(symbol, enclosingDeclaration, meaning) {
-            handleSymbolAccessibilityError(resolver.isSymbolAccessible(symbol, enclosingDeclaration, meaning, /*shouldComputeAliasesToMakeVisible*/ true));
-            recordTypeReferenceDirectivesIfNecessary(resolver.getTypeReferenceDirectivesForSymbol(symbol, meaning));
-        }
-        function reportInaccessibleThisError() {
-            if (errorNameNode) {
-                reportedDeclarationError = true;
-                emitterDiagnostics.add(ts.createDiagnosticForNode(errorNameNode, ts.Diagnostics.The_inferred_type_of_0_references_an_inaccessible_this_type_A_type_annotation_is_necessary, ts.declarationNameToString(errorNameNode)));
-            }
-        }
-        function writeTypeOfDeclaration(declaration, type, getSymbolAccessibilityDiagnostic) {
-            writer.getSymbolAccessibilityDiagnostic = getSymbolAccessibilityDiagnostic;
-            write(": ");
-            if (type) {
-                // Write the type
-                emitType(type);
-            }
-            else {
-                errorNameNode = declaration.name;
-                resolver.writeTypeOfDeclaration(declaration, enclosingDeclaration, 2 /* UseTypeOfFunction */ | 1024 /* UseTypeAliasValue */, writer);
-                errorNameNode = undefined;
-            }
-        }
-        function writeReturnTypeAtSignature(signature, getSymbolAccessibilityDiagnostic) {
-            writer.getSymbolAccessibilityDiagnostic = getSymbolAccessibilityDiagnostic;
-            write(": ");
-            if (signature.type) {
-                // Write the type
-                emitType(signature.type);
-            }
-            else {
-                errorNameNode = signature.name;
-                resolver.writeReturnTypeOfSignatureDeclaration(signature, enclosingDeclaration, 2 /* UseTypeOfFunction */ | 1024 /* UseTypeAliasValue */, writer);
-                errorNameNode = undefined;
-            }
-        }
-        function emitLines(nodes) {
-            for (var _i = 0, nodes_2 = nodes; _i < nodes_2.length; _i++) {
-                var node = nodes_2[_i];
-                emit(node);
-            }
-        }
-        function emitSeparatedList(nodes, separator, eachNodeEmitFn, canEmitFn) {
-            var currentWriterPos = writer.getTextPos();
-            for (var _i = 0, nodes_3 = nodes; _i < nodes_3.length; _i++) {
-                var node = nodes_3[_i];
-                if (!canEmitFn || canEmitFn(node)) {
-                    if (currentWriterPos !== writer.getTextPos()) {
-                        write(separator);
-                    }
-                    currentWriterPos = writer.getTextPos();
-                    eachNodeEmitFn(node);
-                }
-            }
-        }
-        function emitCommaList(nodes, eachNodeEmitFn, canEmitFn) {
-            emitSeparatedList(nodes, ", ", eachNodeEmitFn, canEmitFn);
-        }
-        function writeJsDocComments(declaration) {
-            if (declaration) {
-                var jsDocComments = ts.getJsDocCommentsFromText(declaration, currentText);
-                ts.emitNewLineBeforeLeadingComments(currentLineMap, writer, declaration, jsDocComments);
-                // jsDoc comments are emitted at /*leading comment1 */space/*leading comment*/space
-                ts.emitComments(currentText, currentLineMap, writer, jsDocComments, /*leadingSeparator*/ false, /*trailingSeparator*/ true, newLine, ts.writeCommentRange);
-            }
-        }
-        function emitTypeWithNewGetSymbolAccessibilityDiagnostic(type, getSymbolAccessibilityDiagnostic) {
-            writer.getSymbolAccessibilityDiagnostic = getSymbolAccessibilityDiagnostic;
-            emitType(type);
-        }
-        function emitType(type) {
-            switch (type.kind) {
-                case 117 /* AnyKeyword */:
-                case 132 /* StringKeyword */:
-                case 130 /* NumberKeyword */:
-                case 120 /* BooleanKeyword */:
-                case 133 /* SymbolKeyword */:
-                case 103 /* VoidKeyword */:
-                case 135 /* UndefinedKeyword */:
-                case 93 /* NullKeyword */:
-                case 127 /* NeverKeyword */:
-                case 165 /* ThisType */:
-                case 166 /* LiteralType */:
-                    return writeTextOfNode(currentText, type);
-                case 194 /* ExpressionWithTypeArguments */:
-                    return emitExpressionWithTypeArguments(type);
-                case 155 /* TypeReference */:
-                    return emitTypeReference(type);
-                case 158 /* TypeQuery */:
-                    return emitTypeQuery(type);
-                case 160 /* ArrayType */:
-                    return emitArrayType(type);
-                case 161 /* TupleType */:
-                    return emitTupleType(type);
-                case 162 /* UnionType */:
-                    return emitUnionType(type);
-                case 163 /* IntersectionType */:
-                    return emitIntersectionType(type);
-                case 164 /* ParenthesizedType */:
-                    return emitParenType(type);
-                case 156 /* FunctionType */:
-                case 157 /* ConstructorType */:
-                    return emitSignatureDeclarationWithJsDocComments(type);
-                case 159 /* TypeLiteral */:
-                    return emitTypeLiteral(type);
-                case 69 /* Identifier */:
-                    return emitEntityName(type);
-                case 139 /* QualifiedName */:
-                    return emitEntityName(type);
-                case 154 /* TypePredicate */:
-                    return emitTypePredicate(type);
-            }
-            function writeEntityName(entityName) {
-                if (entityName.kind === 69 /* Identifier */) {
-                    writeTextOfNode(currentText, entityName);
-                }
-                else {
-                    var left = entityName.kind === 139 /* QualifiedName */ ? entityName.left : entityName.expression;
-                    var right = entityName.kind === 139 /* QualifiedName */ ? entityName.right : entityName.name;
-                    writeEntityName(left);
-                    write(".");
-                    writeTextOfNode(currentText, right);
-                }
-            }
-            function emitEntityName(entityName) {
-                var visibilityResult = resolver.isEntityNameVisible(entityName, 
-                // Aliases can be written asynchronously so use correct enclosing declaration
-                entityName.parent.kind === 229 /* ImportEqualsDeclaration */ ? entityName.parent : enclosingDeclaration);
-                handleSymbolAccessibilityError(visibilityResult);
-                recordTypeReferenceDirectivesIfNecessary(resolver.getTypeReferenceDirectivesForEntityName(entityName));
-                writeEntityName(entityName);
-            }
-            function emitExpressionWithTypeArguments(node) {
-                if (ts.isEntityNameExpression(node.expression)) {
-                    ts.Debug.assert(node.expression.kind === 69 /* Identifier */ || node.expression.kind === 172 /* PropertyAccessExpression */);
-                    emitEntityName(node.expression);
-                    if (node.typeArguments) {
-                        write("<");
-                        emitCommaList(node.typeArguments, emitType);
-                        write(">");
-                    }
-                }
-            }
-            function emitTypeReference(type) {
-                emitEntityName(type.typeName);
-                if (type.typeArguments) {
-                    write("<");
-                    emitCommaList(type.typeArguments, emitType);
-                    write(">");
-                }
-            }
-            function emitTypePredicate(type) {
-                writeTextOfNode(currentText, type.parameterName);
-                write(" is ");
-                emitType(type.type);
-            }
-            function emitTypeQuery(type) {
-                write("typeof ");
-                emitEntityName(type.exprName);
-            }
-            function emitArrayType(type) {
-                emitType(type.elementType);
-                write("[]");
-            }
-            function emitTupleType(type) {
-                write("[");
-                emitCommaList(type.elementTypes, emitType);
-                write("]");
-            }
-            function emitUnionType(type) {
-                emitSeparatedList(type.types, " | ", emitType);
-            }
-            function emitIntersectionType(type) {
-                emitSeparatedList(type.types, " & ", emitType);
-            }
-            function emitParenType(type) {
-                write("(");
-                emitType(type.type);
-                write(")");
-            }
-            function emitTypeLiteral(type) {
-                write("{");
-                if (type.members.length) {
-                    writeLine();
-                    increaseIndent();
-                    // write members
-                    emitLines(type.members);
-                    decreaseIndent();
-                }
-                write("}");
-            }
-        }
-        function emitSourceFile(node) {
-            currentText = node.text;
-            currentLineMap = ts.getLineStarts(node);
-            currentIdentifiers = node.identifiers;
-            isCurrentFileExternalModule = ts.isExternalModule(node);
-            enclosingDeclaration = node;
-            ts.emitDetachedComments(currentText, currentLineMap, writer, ts.writeCommentRange, node, newLine, true /* remove comments */);
-            emitLines(node.statements);
-        }
-        // Return a temp variable name to be used in `export default` statements.
-        // The temp name will be of the form _default_counter.
-        // Note that export default is only allowed at most once in a module, so we
-        // do not need to keep track of created temp names.
-        function getExportDefaultTempVariableName() {
-            var baseName = "_default";
-            if (!(baseName in currentIdentifiers)) {
-                return baseName;
-            }
-            var count = 0;
-            while (true) {
-                count++;
-                var name_28 = baseName + "_" + count;
-                if (!(name_28 in currentIdentifiers)) {
-                    return name_28;
-                }
-            }
-        }
-        function emitExportAssignment(node) {
-            if (node.expression.kind === 69 /* Identifier */) {
-                write(node.isExportEquals ? "export = " : "export default ");
-                writeTextOfNode(currentText, node.expression);
-            }
-            else {
-                // Expression
-                var tempVarName = getExportDefaultTempVariableName();
-                if (!noDeclare) {
-                    write("declare ");
-                }
-                write("var ");
-                write(tempVarName);
-                write(": ");
-                writer.getSymbolAccessibilityDiagnostic = getDefaultExportAccessibilityDiagnostic;
-                resolver.writeTypeOfExpression(node.expression, enclosingDeclaration, 2 /* UseTypeOfFunction */ | 1024 /* UseTypeAliasValue */, writer);
-                write(";");
-                writeLine();
-                write(node.isExportEquals ? "export = " : "export default ");
-                write(tempVarName);
-            }
-            write(";");
-            writeLine();
-            // Make all the declarations visible for the export name
-            if (node.expression.kind === 69 /* Identifier */) {
-                var nodes = resolver.collectLinkedAliases(node.expression);
-                // write each of these declarations asynchronously
-                writeAsynchronousModuleElements(nodes);
-            }
-            function getDefaultExportAccessibilityDiagnostic(diagnostic) {
-                return {
-                    diagnosticMessage: ts.Diagnostics.Default_export_of_the_module_has_or_is_using_private_name_0,
-                    errorNode: node
-                };
-            }
-        }
-        function isModuleElementVisible(node) {
-            return resolver.isDeclarationVisible(node);
+    ts.updateJsxSpreadAttribute = updateJsxSpreadAttribute;
+    function createJsxExpression(dotDotDotToken, expression) {
+        var node = createSynthesizedNode(256 /* JsxExpression */);
+        node.dotDotDotToken = dotDotDotToken;
+        node.expression = expression;
+        return node;
+    }
+    ts.createJsxExpression = createJsxExpression;
+    function updateJsxExpression(node, expression) {
+        return node.expression !== expression
+            ? updateNode(createJsxExpression(node.dotDotDotToken, expression), node)
+            : node;
+    }
+    ts.updateJsxExpression = updateJsxExpression;
+    // Clauses
+    function createCaseClause(expression, statements) {
+        var node = createSynthesizedNode(257 /* CaseClause */);
+        node.expression = ts.parenthesizeExpressionForList(expression);
+        node.statements = createNodeArray(statements);
+        return node;
+    }
+    ts.createCaseClause = createCaseClause;
+    function updateCaseClause(node, expression, statements) {
+        return node.expression !== expression
+            || node.statements !== statements
+            ? updateNode(createCaseClause(expression, statements), node)
+            : node;
+    }
+    ts.updateCaseClause = updateCaseClause;
+    function createDefaultClause(statements) {
+        var node = createSynthesizedNode(258 /* DefaultClause */);
+        node.statements = createNodeArray(statements);
+        return node;
+    }
+    ts.createDefaultClause = createDefaultClause;
+    function updateDefaultClause(node, statements) {
+        return node.statements !== statements
+            ? updateNode(createDefaultClause(statements), node)
+            : node;
+    }
+    ts.updateDefaultClause = updateDefaultClause;
+    function createHeritageClause(token, types) {
+        var node = createSynthesizedNode(259 /* HeritageClause */);
+        node.token = token;
+        node.types = createNodeArray(types);
+        return node;
+    }
+    ts.createHeritageClause = createHeritageClause;
+    function updateHeritageClause(node, types) {
+        return node.types !== types
+            ? updateNode(createHeritageClause(node.token, types), node)
+            : node;
+    }
+    ts.updateHeritageClause = updateHeritageClause;
+    function createCatchClause(variableDeclaration, block) {
+        var node = createSynthesizedNode(260 /* CatchClause */);
+        node.variableDeclaration = typeof variableDeclaration === "string" ? createVariableDeclaration(variableDeclaration) : variableDeclaration;
+        node.block = block;
+        return node;
+    }
+    ts.createCatchClause = createCatchClause;
+    function updateCatchClause(node, variableDeclaration, block) {
+        return node.variableDeclaration !== variableDeclaration
+            || node.block !== block
+            ? updateNode(createCatchClause(variableDeclaration, block), node)
+            : node;
+    }
+    ts.updateCatchClause = updateCatchClause;
+    // Property assignments
+    function createPropertyAssignment(name, initializer) {
+        var node = createSynthesizedNode(261 /* PropertyAssignment */);
+        node.name = asName(name);
+        node.questionToken = undefined;
+        node.initializer = initializer !== undefined ? ts.parenthesizeExpressionForList(initializer) : undefined;
+        return node;
+    }
+    ts.createPropertyAssignment = createPropertyAssignment;
+    function updatePropertyAssignment(node, name, initializer) {
+        return node.name !== name
+            || node.initializer !== initializer
+            ? updateNode(createPropertyAssignment(name, initializer), node)
+            : node;
+    }
+    ts.updatePropertyAssignment = updatePropertyAssignment;
+    function createShorthandPropertyAssignment(name, objectAssignmentInitializer) {
+        var node = createSynthesizedNode(262 /* ShorthandPropertyAssignment */);
+        node.name = asName(name);
+        node.objectAssignmentInitializer = objectAssignmentInitializer !== undefined ? ts.parenthesizeExpressionForList(objectAssignmentInitializer) : undefined;
+        return node;
+    }
+    ts.createShorthandPropertyAssignment = createShorthandPropertyAssignment;
+    function updateShorthandPropertyAssignment(node, name, objectAssignmentInitializer) {
+        return node.name !== name
+            || node.objectAssignmentInitializer !== objectAssignmentInitializer
+            ? updateNode(createShorthandPropertyAssignment(name, objectAssignmentInitializer), node)
+            : node;
+    }
+    ts.updateShorthandPropertyAssignment = updateShorthandPropertyAssignment;
+    function createSpreadAssignment(expression) {
+        var node = createSynthesizedNode(263 /* SpreadAssignment */);
+        node.expression = expression !== undefined ? ts.parenthesizeExpressionForList(expression) : undefined;
+        return node;
+    }
+    ts.createSpreadAssignment = createSpreadAssignment;
+    function updateSpreadAssignment(node, expression) {
+        return node.expression !== expression
+            ? updateNode(createSpreadAssignment(expression), node)
+            : node;
+    }
+    ts.updateSpreadAssignment = updateSpreadAssignment;
+    // Enum
+    function createEnumMember(name, initializer) {
+        var node = createSynthesizedNode(264 /* EnumMember */);
+        node.name = asName(name);
+        node.initializer = initializer && ts.parenthesizeExpressionForList(initializer);
+        return node;
+    }
+    ts.createEnumMember = createEnumMember;
+    function updateEnumMember(node, name, initializer) {
+        return node.name !== name
+            || node.initializer !== initializer
+            ? updateNode(createEnumMember(name, initializer), node)
+            : node;
+    }
+    ts.updateEnumMember = updateEnumMember;
+    // Top-level nodes
+    function updateSourceFileNode(node, statements) {
+        if (node.statements !== statements) {
+            var updated = createSynthesizedNode(265 /* SourceFile */);
+            updated.flags |= node.flags;
+            updated.statements = createNodeArray(statements);
+            updated.endOfFileToken = node.endOfFileToken;
+            updated.fileName = node.fileName;
+            updated.path = node.path;
+            updated.text = node.text;
+            if (node.amdDependencies !== undefined)
+                updated.amdDependencies = node.amdDependencies;
+            if (node.moduleName !== undefined)
+                updated.moduleName = node.moduleName;
+            if (node.referencedFiles !== undefined)
+                updated.referencedFiles = node.referencedFiles;
+            if (node.typeReferenceDirectives !== undefined)
+                updated.typeReferenceDirectives = node.typeReferenceDirectives;
+            if (node.languageVariant !== undefined)
+                updated.languageVariant = node.languageVariant;
+            if (node.isDeclarationFile !== undefined)
+                updated.isDeclarationFile = node.isDeclarationFile;
+            if (node.renamedDependencies !== undefined)
+                updated.renamedDependencies = node.renamedDependencies;
+            if (node.hasNoDefaultLib !== undefined)
+                updated.hasNoDefaultLib = node.hasNoDefaultLib;
+            if (node.languageVersion !== undefined)
+                updated.languageVersion = node.languageVersion;
+            if (node.scriptKind !== undefined)
+                updated.scriptKind = node.scriptKind;
+            if (node.externalModuleIndicator !== undefined)
+                updated.externalModuleIndicator = node.externalModuleIndicator;
+            if (node.commonJsModuleIndicator !== undefined)
+                updated.commonJsModuleIndicator = node.commonJsModuleIndicator;
+            if (node.identifiers !== undefined)
+                updated.identifiers = node.identifiers;
+            if (node.nodeCount !== undefined)
+                updated.nodeCount = node.nodeCount;
+            if (node.identifierCount !== undefined)
+                updated.identifierCount = node.identifierCount;
+            if (node.symbolCount !== undefined)
+                updated.symbolCount = node.symbolCount;
+            if (node.parseDiagnostics !== undefined)
+                updated.parseDiagnostics = node.parseDiagnostics;
+            if (node.bindDiagnostics !== undefined)
+                updated.bindDiagnostics = node.bindDiagnostics;
+            if (node.lineMap !== undefined)
+                updated.lineMap = node.lineMap;
+            if (node.classifiableNames !== undefined)
+                updated.classifiableNames = node.classifiableNames;
+            if (node.resolvedModules !== undefined)
+                updated.resolvedModules = node.resolvedModules;
+            if (node.resolvedTypeReferenceDirectiveNames !== undefined)
+                updated.resolvedTypeReferenceDirectiveNames = node.resolvedTypeReferenceDirectiveNames;
+            if (node.imports !== undefined)
+                updated.imports = node.imports;
+            if (node.moduleAugmentations !== undefined)
+                updated.moduleAugmentations = node.moduleAugmentations;
+            return updateNode(updated, node);
         }
-        function emitModuleElement(node, isModuleElementVisible) {
-            if (isModuleElementVisible) {
-                writeModuleElement(node);
-            }
-            else if (node.kind === 229 /* ImportEqualsDeclaration */ ||
-                (node.parent.kind === 256 /* SourceFile */ && isCurrentFileExternalModule)) {
-                var isVisible = void 0;
-                if (asynchronousSubModuleDeclarationEmitInfo && node.parent.kind !== 256 /* SourceFile */) {
-                    // Import declaration of another module that is visited async so lets put it in right spot
-                    asynchronousSubModuleDeclarationEmitInfo.push({
-                        node: node,
-                        outputPos: writer.getTextPos(),
-                        indent: writer.getIndent(),
-                        isVisible: isVisible
-                    });
-                }
-                else {
-                    if (node.kind === 230 /* ImportDeclaration */) {
-                        var importDeclaration = node;
-                        if (importDeclaration.importClause) {
-                            isVisible = (importDeclaration.importClause.name && resolver.isDeclarationVisible(importDeclaration.importClause)) ||
-                                isVisibleNamedBinding(importDeclaration.importClause.namedBindings);
-                        }
-                    }
-                    moduleElementDeclarationEmitInfo.push({
-                        node: node,
-                        outputPos: writer.getTextPos(),
-                        indent: writer.getIndent(),
-                        isVisible: isVisible
-                    });
-                }
-            }
+        return node;
+    }
+    ts.updateSourceFileNode = updateSourceFileNode;
+    /**
+     * Creates a shallow, memberwise clone of a node for mutation.
+     */
+    function getMutableClone(node) {
+        var clone = getSynthesizedClone(node);
+        clone.pos = node.pos;
+        clone.end = node.end;
+        clone.parent = node.parent;
+        return clone;
+    }
+    ts.getMutableClone = getMutableClone;
+    // Transformation nodes
+    /**
+     * Creates a synthetic statement to act as a placeholder for a not-emitted statement in
+     * order to preserve comments.
+     *
+     * @param original The original statement.
+     */
+    function createNotEmittedStatement(original) {
+        var node = createSynthesizedNode(296 /* NotEmittedStatement */);
+        node.original = original;
+        setTextRange(node, original);
+        return node;
+    }
+    ts.createNotEmittedStatement = createNotEmittedStatement;
+    /**
+     * Creates a synthetic element to act as a placeholder for the end of an emitted declaration in
+     * order to properly emit exports.
+     */
+    /* @internal */
+    function createEndOfDeclarationMarker(original) {
+        var node = createSynthesizedNode(300 /* EndOfDeclarationMarker */);
+        node.emitNode = {};
+        node.original = original;
+        return node;
+    }
+    ts.createEndOfDeclarationMarker = createEndOfDeclarationMarker;
+    /**
+     * Creates a synthetic element to act as a placeholder for the beginning of a merged declaration in
+     * order to properly emit exports.
+     */
+    /* @internal */
+    function createMergeDeclarationMarker(original) {
+        var node = createSynthesizedNode(299 /* MergeDeclarationMarker */);
+        node.emitNode = {};
+        node.original = original;
+        return node;
+    }
+    ts.createMergeDeclarationMarker = createMergeDeclarationMarker;
+    /**
+     * Creates a synthetic expression to act as a placeholder for a not-emitted expression in
+     * order to preserve comments or sourcemap positions.
+     *
+     * @param expression The inner expression to emit.
+     * @param original The original outer expression.
+     * @param location The location for the expression. Defaults to the positions from "original" if provided.
+     */
+    function createPartiallyEmittedExpression(expression, original) {
+        var node = createSynthesizedNode(297 /* PartiallyEmittedExpression */);
+        node.expression = expression;
+        node.original = original;
+        setTextRange(node, original);
+        return node;
+    }
+    ts.createPartiallyEmittedExpression = createPartiallyEmittedExpression;
+    function updatePartiallyEmittedExpression(node, expression) {
+        if (node.expression !== expression) {
+            return updateNode(createPartiallyEmittedExpression(expression, node.original), node);
         }
-        function writeModuleElement(node) {
-            switch (node.kind) {
-                case 220 /* FunctionDeclaration */:
-                    return writeFunctionDeclaration(node);
-                case 200 /* VariableStatement */:
-                    return writeVariableStatement(node);
-                case 222 /* InterfaceDeclaration */:
-                    return writeInterfaceDeclaration(node);
-                case 221 /* ClassDeclaration */:
-                    return writeClassDeclaration(node);
-                case 223 /* TypeAliasDeclaration */:
-                    return writeTypeAliasDeclaration(node);
-                case 224 /* EnumDeclaration */:
-                    return writeEnumDeclaration(node);
-                case 225 /* ModuleDeclaration */:
-                    return writeModuleDeclaration(node);
-                case 229 /* ImportEqualsDeclaration */:
-                    return writeImportEqualsDeclaration(node);
-                case 230 /* ImportDeclaration */:
-                    return writeImportDeclaration(node);
-                default:
-                    ts.Debug.fail("Unknown symbol kind");
+        return node;
+    }
+    ts.updatePartiallyEmittedExpression = updatePartiallyEmittedExpression;
+    function flattenCommaElements(node) {
+        if (ts.nodeIsSynthesized(node) && !ts.isParseTreeNode(node) && !node.original && !node.emitNode && !node.id) {
+            if (node.kind === 298 /* CommaListExpression */) {
+                return node.elements;
             }
-        }
-        function emitModuleElementDeclarationFlags(node) {
-            // If the node is parented in the current source file we need to emit export declare or just export
-            if (node.parent.kind === 256 /* SourceFile */) {
-                var modifiers = ts.getModifierFlags(node);
-                // If the node is exported
-                if (modifiers & 1 /* Export */) {
-                    write("export ");
-                }
-                if (modifiers & 512 /* Default */) {
-                    write("default ");
-                }
-                else if (node.kind !== 222 /* InterfaceDeclaration */ && !noDeclare) {
-                    write("declare ");
-                }
+            if (ts.isBinaryExpression(node) && node.operatorToken.kind === 26 /* CommaToken */) {
+                return [node.left, node.right];
             }
         }
-        function emitClassMemberDeclarationFlags(flags) {
-            if (flags & 8 /* Private */) {
-                write("private ");
-            }
-            else if (flags & 16 /* Protected */) {
-                write("protected ");
-            }
-            if (flags & 32 /* Static */) {
-                write("static ");
-            }
-            if (flags & 64 /* Readonly */) {
-                write("readonly ");
-            }
-            if (flags & 128 /* Abstract */) {
-                write("abstract ");
-            }
+        return node;
+    }
+    function createCommaList(elements) {
+        var node = createSynthesizedNode(298 /* CommaListExpression */);
+        node.elements = createNodeArray(ts.sameFlatMap(elements, flattenCommaElements));
+        return node;
+    }
+    ts.createCommaList = createCommaList;
+    function updateCommaList(node, elements) {
+        return node.elements !== elements
+            ? updateNode(createCommaList(elements), node)
+            : node;
+    }
+    ts.updateCommaList = updateCommaList;
+    function createBundle(sourceFiles) {
+        var node = ts.createNode(266 /* Bundle */);
+        node.sourceFiles = sourceFiles;
+        return node;
+    }
+    ts.createBundle = createBundle;
+    function updateBundle(node, sourceFiles) {
+        if (node.sourceFiles !== sourceFiles) {
+            return createBundle(sourceFiles);
         }
-        function writeImportEqualsDeclaration(node) {
-            // note usage of writer. methods instead of aliases created, just to make sure we are using
-            // correct writer especially to handle asynchronous alias writing
-            emitJsDocComments(node);
-            if (ts.hasModifier(node, 1 /* Export */)) {
-                write("export ");
-            }
-            write("import ");
-            writeTextOfNode(currentText, node.name);
-            write(" = ");
-            if (ts.isInternalModuleImportEqualsDeclaration(node)) {
-                emitTypeWithNewGetSymbolAccessibilityDiagnostic(node.moduleReference, getImportEntityNameVisibilityError);
-                write(";");
-            }
-            else {
-                write("require(");
-                emitExternalModuleSpecifier(node);
-                write(");");
-            }
-            writer.writeLine();
-            function getImportEntityNameVisibilityError(symbolAccessibilityResult) {
-                return {
-                    diagnosticMessage: ts.Diagnostics.Import_declaration_0_is_using_private_name_1,
-                    errorNode: node,
-                    typeName: node.name
-                };
+        return node;
+    }
+    ts.updateBundle = updateBundle;
+    function createImmediatelyInvokedFunctionExpression(statements, param, paramValue) {
+        return createCall(createFunctionExpression(
+        /*modifiers*/ undefined, 
+        /*asteriskToken*/ undefined, 
+        /*name*/ undefined, 
+        /*typeParameters*/ undefined, 
+        /*parameters*/ param ? [param] : [], 
+        /*type*/ undefined, createBlock(statements, /*multiLine*/ true)), 
+        /*typeArguments*/ undefined, 
+        /*argumentsArray*/ paramValue ? [paramValue] : []);
+    }
+    ts.createImmediatelyInvokedFunctionExpression = createImmediatelyInvokedFunctionExpression;
+    function createComma(left, right) {
+        return createBinary(left, 26 /* CommaToken */, right);
+    }
+    ts.createComma = createComma;
+    function createLessThan(left, right) {
+        return createBinary(left, 27 /* LessThanToken */, right);
+    }
+    ts.createLessThan = createLessThan;
+    function createAssignment(left, right) {
+        return createBinary(left, 58 /* EqualsToken */, right);
+    }
+    ts.createAssignment = createAssignment;
+    function createStrictEquality(left, right) {
+        return createBinary(left, 34 /* EqualsEqualsEqualsToken */, right);
+    }
+    ts.createStrictEquality = createStrictEquality;
+    function createStrictInequality(left, right) {
+        return createBinary(left, 35 /* ExclamationEqualsEqualsToken */, right);
+    }
+    ts.createStrictInequality = createStrictInequality;
+    function createAdd(left, right) {
+        return createBinary(left, 37 /* PlusToken */, right);
+    }
+    ts.createAdd = createAdd;
+    function createSubtract(left, right) {
+        return createBinary(left, 38 /* MinusToken */, right);
+    }
+    ts.createSubtract = createSubtract;
+    function createPostfixIncrement(operand) {
+        return createPostfix(operand, 43 /* PlusPlusToken */);
+    }
+    ts.createPostfixIncrement = createPostfixIncrement;
+    function createLogicalAnd(left, right) {
+        return createBinary(left, 53 /* AmpersandAmpersandToken */, right);
+    }
+    ts.createLogicalAnd = createLogicalAnd;
+    function createLogicalOr(left, right) {
+        return createBinary(left, 54 /* BarBarToken */, right);
+    }
+    ts.createLogicalOr = createLogicalOr;
+    function createLogicalNot(operand) {
+        return createPrefix(51 /* ExclamationToken */, operand);
+    }
+    ts.createLogicalNot = createLogicalNot;
+    function createVoidZero() {
+        return createVoid(createLiteral(0));
+    }
+    ts.createVoidZero = createVoidZero;
+    function createExportDefault(expression) {
+        return createExportAssignment(/*decorators*/ undefined, /*modifiers*/ undefined, /*isExportEquals*/ false, expression);
+    }
+    ts.createExportDefault = createExportDefault;
+    function createExternalModuleExport(exportName) {
+        return createExportDeclaration(/*decorators*/ undefined, /*modifiers*/ undefined, createNamedExports([createExportSpecifier(/*propertyName*/ undefined, exportName)]));
+    }
+    ts.createExternalModuleExport = createExternalModuleExport;
+    function asName(name) {
+        return typeof name === "string" ? createIdentifier(name) : name;
+    }
+    function asExpression(value) {
+        return typeof value === "string" || typeof value === "number" ? createLiteral(value) : value;
+    }
+    function asNodeArray(array) {
+        return array ? createNodeArray(array) : undefined;
+    }
+    function asToken(value) {
+        return typeof value === "number" ? createToken(value) : value;
+    }
+    /**
+     * Clears any EmitNode entries from parse-tree nodes.
+     * @param sourceFile A source file.
+     */
+    function disposeEmitNodes(sourceFile) {
+        // During transformation we may need to annotate a parse tree node with transient
+        // transformation properties. As parse tree nodes live longer than transformation
+        // nodes, we need to make sure we reclaim any memory allocated for custom ranges
+        // from these nodes to ensure we do not hold onto entire subtrees just for position
+        // information. We also need to reset these nodes to a pre-transformation state
+        // for incremental parsing scenarios so that we do not impact later emit.
+        sourceFile = ts.getSourceFileOfNode(ts.getParseTreeNode(sourceFile));
+        var emitNode = sourceFile && sourceFile.emitNode;
+        var annotatedNodes = emitNode && emitNode.annotatedNodes;
+        if (annotatedNodes) {
+            for (var _i = 0, annotatedNodes_1 = annotatedNodes; _i < annotatedNodes_1.length; _i++) {
+                var node = annotatedNodes_1[_i];
+                node.emitNode = undefined;
             }
         }
-        function isVisibleNamedBinding(namedBindings) {
-            if (namedBindings) {
-                if (namedBindings.kind === 232 /* NamespaceImport */) {
-                    return resolver.isDeclarationVisible(namedBindings);
-                }
-                else {
-                    return ts.forEach(namedBindings.elements, function (namedImport) { return resolver.isDeclarationVisible(namedImport); });
+    }
+    ts.disposeEmitNodes = disposeEmitNodes;
+    /**
+     * Associates a node with the current transformation, initializing
+     * various transient transformation properties.
+     */
+    /* @internal */
+    function getOrCreateEmitNode(node) {
+        if (!node.emitNode) {
+            if (ts.isParseTreeNode(node)) {
+                // To avoid holding onto transformation artifacts, we keep track of any
+                // parse tree node we are annotating. This allows us to clean them up after
+                // all transformations have completed.
+                if (node.kind === 265 /* SourceFile */) {
+                    return node.emitNode = { annotatedNodes: [node] };
                 }
+                var sourceFile = ts.getSourceFileOfNode(node);
+                getOrCreateEmitNode(sourceFile).annotatedNodes.push(node);
             }
+            node.emitNode = {};
         }
-        function writeImportDeclaration(node) {
-            emitJsDocComments(node);
-            if (ts.hasModifier(node, 1 /* Export */)) {
-                write("export ");
-            }
-            write("import ");
-            if (node.importClause) {
-                var currentWriterPos = writer.getTextPos();
-                if (node.importClause.name && resolver.isDeclarationVisible(node.importClause)) {
-                    writeTextOfNode(currentText, node.importClause.name);
-                }
-                if (node.importClause.namedBindings && isVisibleNamedBinding(node.importClause.namedBindings)) {
-                    if (currentWriterPos !== writer.getTextPos()) {
-                        // If the default binding was emitted, write the separated
-                        write(", ");
-                    }
-                    if (node.importClause.namedBindings.kind === 232 /* NamespaceImport */) {
-                        write("* as ");
-                        writeTextOfNode(currentText, node.importClause.namedBindings.name);
-                    }
-                    else {
-                        write("{ ");
-                        emitCommaList(node.importClause.namedBindings.elements, emitImportOrExportSpecifier, resolver.isDeclarationVisible);
-                        write(" }");
-                    }
-                }
-                write(" from ");
-            }
-            emitExternalModuleSpecifier(node);
-            write(";");
-            writer.writeLine();
+        return node.emitNode;
+    }
+    ts.getOrCreateEmitNode = getOrCreateEmitNode;
+    function setTextRange(range, location) {
+        if (location) {
+            range.pos = location.pos;
+            range.end = location.end;
         }
-        function emitExternalModuleSpecifier(parent) {
-            // emitExternalModuleSpecifier is usually called when we emit something in the.d.ts file that will make it an external module (i.e. import/export declarations).
-            // the only case when it is not true is when we call it to emit correct name for module augmentation - d.ts files with just module augmentations are not considered
-            // external modules since they are indistinguishable from script files with ambient modules. To fix this in such d.ts files we'll emit top level 'export {}'
-            // so compiler will treat them as external modules.
-            resultHasExternalModuleIndicator = resultHasExternalModuleIndicator || parent.kind !== 225 /* ModuleDeclaration */;
-            var moduleSpecifier;
-            if (parent.kind === 229 /* ImportEqualsDeclaration */) {
-                var node = parent;
-                moduleSpecifier = ts.getExternalModuleImportEqualsDeclarationExpression(node);
-            }
-            else if (parent.kind === 225 /* ModuleDeclaration */) {
-                moduleSpecifier = parent.name;
-            }
-            else {
-                var node = parent;
-                moduleSpecifier = node.moduleSpecifier;
-            }
-            if (moduleSpecifier.kind === 9 /* StringLiteral */ && isBundledEmit && (compilerOptions.out || compilerOptions.outFile)) {
-                var moduleName = ts.getExternalModuleNameFromDeclaration(host, resolver, parent);
-                if (moduleName) {
-                    write('"');
-                    write(moduleName);
-                    write('"');
-                    return;
+        return range;
+    }
+    ts.setTextRange = setTextRange;
+    /**
+     * Sets flags that control emit behavior of a node.
+     */
+    function setEmitFlags(node, emitFlags) {
+        getOrCreateEmitNode(node).flags = emitFlags;
+        return node;
+    }
+    ts.setEmitFlags = setEmitFlags;
+    /**
+     * Gets a custom text range to use when emitting source maps.
+     */
+    function getSourceMapRange(node) {
+        var emitNode = node.emitNode;
+        return (emitNode && emitNode.sourceMapRange) || node;
+    }
+    ts.getSourceMapRange = getSourceMapRange;
+    /**
+     * Sets a custom text range to use when emitting source maps.
+     */
+    function setSourceMapRange(node, range) {
+        getOrCreateEmitNode(node).sourceMapRange = range;
+        return node;
+    }
+    ts.setSourceMapRange = setSourceMapRange;
+    var SourceMapSource;
+    /**
+     * Create an external source map source file reference
+     */
+    function createSourceMapSource(fileName, text, skipTrivia) {
+        return new (SourceMapSource || (SourceMapSource = ts.objectAllocator.getSourceMapSourceConstructor()))(fileName, text, skipTrivia);
+    }
+    ts.createSourceMapSource = createSourceMapSource;
+    /**
+     * Gets the TextRange to use for source maps for a token of a node.
+     */
+    function getTokenSourceMapRange(node, token) {
+        var emitNode = node.emitNode;
+        var tokenSourceMapRanges = emitNode && emitNode.tokenSourceMapRanges;
+        return tokenSourceMapRanges && tokenSourceMapRanges[token];
+    }
+    ts.getTokenSourceMapRange = getTokenSourceMapRange;
+    /**
+     * Sets the TextRange to use for source maps for a token of a node.
+     */
+    function setTokenSourceMapRange(node, token, range) {
+        var emitNode = getOrCreateEmitNode(node);
+        var tokenSourceMapRanges = emitNode.tokenSourceMapRanges || (emitNode.tokenSourceMapRanges = []);
+        tokenSourceMapRanges[token] = range;
+        return node;
+    }
+    ts.setTokenSourceMapRange = setTokenSourceMapRange;
+    /**
+     * Gets a custom text range to use when emitting comments.
+     */
+    function getCommentRange(node) {
+        var emitNode = node.emitNode;
+        return (emitNode && emitNode.commentRange) || node;
+    }
+    ts.getCommentRange = getCommentRange;
+    /**
+     * Sets a custom text range to use when emitting comments.
+     */
+    function setCommentRange(node, range) {
+        getOrCreateEmitNode(node).commentRange = range;
+        return node;
+    }
+    ts.setCommentRange = setCommentRange;
+    function getSyntheticLeadingComments(node) {
+        var emitNode = node.emitNode;
+        return emitNode && emitNode.leadingComments;
+    }
+    ts.getSyntheticLeadingComments = getSyntheticLeadingComments;
+    function setSyntheticLeadingComments(node, comments) {
+        getOrCreateEmitNode(node).leadingComments = comments;
+        return node;
+    }
+    ts.setSyntheticLeadingComments = setSyntheticLeadingComments;
+    function addSyntheticLeadingComment(node, kind, text, hasTrailingNewLine) {
+        return setSyntheticLeadingComments(node, ts.append(getSyntheticLeadingComments(node), { kind: kind, pos: -1, end: -1, hasTrailingNewLine: hasTrailingNewLine, text: text }));
+    }
+    ts.addSyntheticLeadingComment = addSyntheticLeadingComment;
+    function getSyntheticTrailingComments(node) {
+        var emitNode = node.emitNode;
+        return emitNode && emitNode.trailingComments;
+    }
+    ts.getSyntheticTrailingComments = getSyntheticTrailingComments;
+    function setSyntheticTrailingComments(node, comments) {
+        getOrCreateEmitNode(node).trailingComments = comments;
+        return node;
+    }
+    ts.setSyntheticTrailingComments = setSyntheticTrailingComments;
+    function addSyntheticTrailingComment(node, kind, text, hasTrailingNewLine) {
+        return setSyntheticTrailingComments(node, ts.append(getSyntheticTrailingComments(node), { kind: kind, pos: -1, end: -1, hasTrailingNewLine: hasTrailingNewLine, text: text }));
+    }
+    ts.addSyntheticTrailingComment = addSyntheticTrailingComment;
+    /**
+     * Gets the constant value to emit for an expression.
+     */
+    function getConstantValue(node) {
+        var emitNode = node.emitNode;
+        return emitNode && emitNode.constantValue;
+    }
+    ts.getConstantValue = getConstantValue;
+    /**
+     * Sets the constant value to emit for an expression.
+     */
+    function setConstantValue(node, value) {
+        var emitNode = getOrCreateEmitNode(node);
+        emitNode.constantValue = value;
+        return node;
+    }
+    ts.setConstantValue = setConstantValue;
+    /**
+     * Adds an EmitHelper to a node.
+     */
+    function addEmitHelper(node, helper) {
+        var emitNode = getOrCreateEmitNode(node);
+        emitNode.helpers = ts.append(emitNode.helpers, helper);
+        return node;
+    }
+    ts.addEmitHelper = addEmitHelper;
+    /**
+     * Add EmitHelpers to a node.
+     */
+    function addEmitHelpers(node, helpers) {
+        if (ts.some(helpers)) {
+            var emitNode = getOrCreateEmitNode(node);
+            for (var _i = 0, helpers_1 = helpers; _i < helpers_1.length; _i++) {
+                var helper = helpers_1[_i];
+                if (!ts.contains(emitNode.helpers, helper)) {
+                    emitNode.helpers = ts.append(emitNode.helpers, helper);
                 }
             }
-            writeTextOfNode(currentText, moduleSpecifier);
-        }
-        function emitImportOrExportSpecifier(node) {
-            if (node.propertyName) {
-                writeTextOfNode(currentText, node.propertyName);
-                write(" as ");
-            }
-            writeTextOfNode(currentText, node.name);
-        }
-        function emitExportSpecifier(node) {
-            emitImportOrExportSpecifier(node);
-            // Make all the declarations visible for the export name
-            var nodes = resolver.collectLinkedAliases(node.propertyName || node.name);
-            // write each of these declarations asynchronously
-            writeAsynchronousModuleElements(nodes);
         }
-        function emitExportDeclaration(node) {
-            emitJsDocComments(node);
-            write("export ");
-            if (node.exportClause) {
-                write("{ ");
-                emitCommaList(node.exportClause.elements, emitExportSpecifier);
-                write(" }");
-            }
-            else {
-                write("*");
-            }
-            if (node.moduleSpecifier) {
-                write(" from ");
-                emitExternalModuleSpecifier(node);
+        return node;
+    }
+    ts.addEmitHelpers = addEmitHelpers;
+    /**
+     * Removes an EmitHelper from a node.
+     */
+    function removeEmitHelper(node, helper) {
+        var emitNode = node.emitNode;
+        if (emitNode) {
+            var helpers = emitNode.helpers;
+            if (helpers) {
+                return ts.orderedRemoveItem(helpers, helper);
             }
-            write(";");
-            writer.writeLine();
         }
-        function writeModuleDeclaration(node) {
-            emitJsDocComments(node);
-            emitModuleElementDeclarationFlags(node);
-            if (ts.isGlobalScopeAugmentation(node)) {
-                write("global ");
-            }
-            else {
-                if (node.flags & 16 /* Namespace */) {
-                    write("namespace ");
-                }
-                else {
-                    write("module ");
-                }
-                if (ts.isExternalModuleAugmentation(node)) {
-                    emitExternalModuleSpecifier(node);
-                }
-                else {
-                    writeTextOfNode(currentText, node.name);
+        return false;
+    }
+    ts.removeEmitHelper = removeEmitHelper;
+    /**
+     * Gets the EmitHelpers of a node.
+     */
+    function getEmitHelpers(node) {
+        var emitNode = node.emitNode;
+        return emitNode && emitNode.helpers;
+    }
+    ts.getEmitHelpers = getEmitHelpers;
+    /**
+     * Moves matching emit helpers from a source node to a target node.
+     */
+    function moveEmitHelpers(source, target, predicate) {
+        var sourceEmitNode = source.emitNode;
+        var sourceEmitHelpers = sourceEmitNode && sourceEmitNode.helpers;
+        if (!ts.some(sourceEmitHelpers))
+            return;
+        var targetEmitNode = getOrCreateEmitNode(target);
+        var helpersRemoved = 0;
+        for (var i = 0; i < sourceEmitHelpers.length; i++) {
+            var helper = sourceEmitHelpers[i];
+            if (predicate(helper)) {
+                helpersRemoved++;
+                if (!ts.contains(targetEmitNode.helpers, helper)) {
+                    targetEmitNode.helpers = ts.append(targetEmitNode.helpers, helper);
                 }
             }
-            while (node.body && node.body.kind !== 226 /* ModuleBlock */) {
-                node = node.body;
-                write(".");
-                writeTextOfNode(currentText, node.name);
-            }
-            var prevEnclosingDeclaration = enclosingDeclaration;
-            if (node.body) {
-                enclosingDeclaration = node;
-                write(" {");
-                writeLine();
-                increaseIndent();
-                emitLines(node.body.statements);
-                decreaseIndent();
-                write("}");
-                writeLine();
-                enclosingDeclaration = prevEnclosingDeclaration;
-            }
-            else {
-                write(";");
+            else if (helpersRemoved > 0) {
+                sourceEmitHelpers[i - helpersRemoved] = helper;
             }
         }
-        function writeTypeAliasDeclaration(node) {
-            var prevEnclosingDeclaration = enclosingDeclaration;
-            enclosingDeclaration = node;
-            emitJsDocComments(node);
-            emitModuleElementDeclarationFlags(node);
-            write("type ");
-            writeTextOfNode(currentText, node.name);
-            emitTypeParameters(node.typeParameters);
-            write(" = ");
-            emitTypeWithNewGetSymbolAccessibilityDiagnostic(node.type, getTypeAliasDeclarationVisibilityError);
-            write(";");
-            writeLine();
-            enclosingDeclaration = prevEnclosingDeclaration;
-            function getTypeAliasDeclarationVisibilityError(symbolAccessibilityResult) {
-                return {
-                    diagnosticMessage: ts.Diagnostics.Exported_type_alias_0_has_or_is_using_private_name_1,
-                    errorNode: node.type,
-                    typeName: node.name
-                };
-            }
+        if (helpersRemoved > 0) {
+            sourceEmitHelpers.length -= helpersRemoved;
         }
-        function writeEnumDeclaration(node) {
-            emitJsDocComments(node);
-            emitModuleElementDeclarationFlags(node);
-            if (ts.isConst(node)) {
-                write("const ");
-            }
-            write("enum ");
-            writeTextOfNode(currentText, node.name);
-            write(" {");
-            writeLine();
-            increaseIndent();
-            emitLines(node.members);
-            decreaseIndent();
-            write("}");
-            writeLine();
+    }
+    ts.moveEmitHelpers = moveEmitHelpers;
+    /* @internal */
+    function compareEmitHelpers(x, y) {
+        if (x === y)
+            return 0 /* EqualTo */;
+        if (x.priority === y.priority)
+            return 0 /* EqualTo */;
+        if (x.priority === undefined)
+            return 1 /* GreaterThan */;
+        if (y.priority === undefined)
+            return -1 /* LessThan */;
+        return ts.compareValues(x.priority, y.priority);
+    }
+    ts.compareEmitHelpers = compareEmitHelpers;
+    function setOriginalNode(node, original) {
+        node.original = original;
+        if (original) {
+            var emitNode = original.emitNode;
+            if (emitNode)
+                node.emitNode = mergeEmitNode(emitNode, node.emitNode);
         }
-        function emitEnumMemberDeclaration(node) {
-            emitJsDocComments(node);
-            writeTextOfNode(currentText, node.name);
-            var enumMemberValue = resolver.getConstantValue(node);
-            if (enumMemberValue !== undefined) {
-                write(" = ");
-                write(enumMemberValue.toString());
-            }
-            write(",");
-            writeLine();
+        return node;
+    }
+    ts.setOriginalNode = setOriginalNode;
+    function mergeEmitNode(sourceEmitNode, destEmitNode) {
+        var flags = sourceEmitNode.flags, leadingComments = sourceEmitNode.leadingComments, trailingComments = sourceEmitNode.trailingComments, commentRange = sourceEmitNode.commentRange, sourceMapRange = sourceEmitNode.sourceMapRange, tokenSourceMapRanges = sourceEmitNode.tokenSourceMapRanges, constantValue = sourceEmitNode.constantValue, helpers = sourceEmitNode.helpers;
+        if (!destEmitNode)
+            destEmitNode = {};
+        // We are using `.slice()` here in case `destEmitNode.leadingComments` is pushed to later.
+        if (leadingComments)
+            destEmitNode.leadingComments = ts.addRange(leadingComments.slice(), destEmitNode.leadingComments);
+        if (trailingComments)
+            destEmitNode.trailingComments = ts.addRange(trailingComments.slice(), destEmitNode.trailingComments);
+        if (flags)
+            destEmitNode.flags = flags;
+        if (commentRange)
+            destEmitNode.commentRange = commentRange;
+        if (sourceMapRange)
+            destEmitNode.sourceMapRange = sourceMapRange;
+        if (tokenSourceMapRanges)
+            destEmitNode.tokenSourceMapRanges = mergeTokenSourceMapRanges(tokenSourceMapRanges, destEmitNode.tokenSourceMapRanges);
+        if (constantValue !== undefined)
+            destEmitNode.constantValue = constantValue;
+        if (helpers)
+            destEmitNode.helpers = ts.addRange(destEmitNode.helpers, helpers);
+        return destEmitNode;
+    }
+    function mergeTokenSourceMapRanges(sourceRanges, destRanges) {
+        if (!destRanges)
+            destRanges = [];
+        for (var key in sourceRanges) {
+            destRanges[key] = sourceRanges[key];
         }
-        function isPrivateMethodTypeParameter(node) {
-            return node.parent.kind === 147 /* MethodDeclaration */ && ts.hasModifier(node.parent, 8 /* Private */);
+        return destRanges;
+    }
+})(ts || (ts = {}));
+/* @internal */
+(function (ts) {
+    ts.nullTransformationContext = {
+        enableEmitNotification: ts.noop,
+        enableSubstitution: ts.noop,
+        endLexicalEnvironment: function () { return undefined; },
+        getCompilerOptions: ts.notImplemented,
+        getEmitHost: ts.notImplemented,
+        getEmitResolver: ts.notImplemented,
+        hoistFunctionDeclaration: ts.noop,
+        hoistVariableDeclaration: ts.noop,
+        isEmitNotificationEnabled: ts.notImplemented,
+        isSubstitutionEnabled: ts.notImplemented,
+        onEmitNode: ts.noop,
+        onSubstituteNode: ts.notImplemented,
+        readEmitHelpers: ts.notImplemented,
+        requestEmitHelper: ts.noop,
+        resumeLexicalEnvironment: ts.noop,
+        startLexicalEnvironment: ts.noop,
+        suspendLexicalEnvironment: ts.noop
+    };
+    function createTypeCheck(value, tag) {
+        return tag === "undefined"
+            ? ts.createStrictEquality(value, ts.createVoidZero())
+            : ts.createStrictEquality(ts.createTypeOf(value), ts.createLiteral(tag));
+    }
+    ts.createTypeCheck = createTypeCheck;
+    function createMemberAccessForPropertyName(target, memberName, location) {
+        if (ts.isComputedPropertyName(memberName)) {
+            return ts.setTextRange(ts.createElementAccess(target, memberName.expression), location);
         }
-        function emitTypeParameters(typeParameters) {
-            function emitTypeParameter(node) {
-                increaseIndent();
-                emitJsDocComments(node);
-                decreaseIndent();
-                writeTextOfNode(currentText, node.name);
-                // If there is constraint present and this is not a type parameter of the private method emit the constraint
-                if (node.constraint && !isPrivateMethodTypeParameter(node)) {
-                    write(" extends ");
-                    if (node.parent.kind === 156 /* FunctionType */ ||
-                        node.parent.kind === 157 /* ConstructorType */ ||
-                        (node.parent.parent && node.parent.parent.kind === 159 /* TypeLiteral */)) {
-                        ts.Debug.assert(node.parent.kind === 147 /* MethodDeclaration */ ||
-                            node.parent.kind === 146 /* MethodSignature */ ||
-                            node.parent.kind === 156 /* FunctionType */ ||
-                            node.parent.kind === 157 /* ConstructorType */ ||
-                            node.parent.kind === 151 /* CallSignature */ ||
-                            node.parent.kind === 152 /* ConstructSignature */);
-                        emitType(node.constraint);
-                    }
-                    else {
-                        emitTypeWithNewGetSymbolAccessibilityDiagnostic(node.constraint, getTypeParameterConstraintVisibilityError);
-                    }
-                }
-                function getTypeParameterConstraintVisibilityError(symbolAccessibilityResult) {
-                    // Type parameter constraints are named by user so we should always be able to name it
-                    var diagnosticMessage;
-                    switch (node.parent.kind) {
-                        case 221 /* ClassDeclaration */:
-                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_class_has_or_is_using_private_name_1;
-                            break;
-                        case 222 /* InterfaceDeclaration */:
-                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1;
-                            break;
-                        case 152 /* ConstructSignature */:
-                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1;
-                            break;
-                        case 151 /* CallSignature */:
-                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1;
-                            break;
-                        case 147 /* MethodDeclaration */:
-                        case 146 /* MethodSignature */:
-                            if (ts.hasModifier(node.parent, 32 /* Static */)) {
-                                diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1;
-                            }
-                            else if (node.parent.parent.kind === 221 /* ClassDeclaration */) {
-                                diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1;
-                            }
-                            else {
-                                diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1;
-                            }
-                            break;
-                        case 220 /* FunctionDeclaration */:
-                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_function_has_or_is_using_private_name_1;
-                            break;
-                        default:
-                            ts.Debug.fail("This is unknown parent for type parameter: " + node.parent.kind);
-                    }
-                    return {
-                        diagnosticMessage: diagnosticMessage,
-                        errorNode: node,
-                        typeName: node.name
-                    };
-                }
-            }
-            if (typeParameters) {
-                write("<");
-                emitCommaList(typeParameters, emitTypeParameter);
-                write(">");
-            }
+        else {
+            var expression = ts.setTextRange(ts.isIdentifier(memberName)
+                ? ts.createPropertyAccess(target, memberName)
+                : ts.createElementAccess(target, memberName), memberName);
+            ts.getOrCreateEmitNode(expression).flags |= 64 /* NoNestedSourceMaps */;
+            return expression;
         }
-        function emitHeritageClause(typeReferences, isImplementsList) {
-            if (typeReferences) {
-                write(isImplementsList ? " implements " : " extends ");
-                emitCommaList(typeReferences, emitTypeOfTypeReference);
-            }
-            function emitTypeOfTypeReference(node) {
-                if (ts.isEntityNameExpression(node.expression)) {
-                    emitTypeWithNewGetSymbolAccessibilityDiagnostic(node, getHeritageClauseVisibilityError);
-                }
-                else if (!isImplementsList && node.expression.kind === 93 /* NullKeyword */) {
-                    write("null");
-                }
-                else {
-                    writer.getSymbolAccessibilityDiagnostic = getHeritageClauseVisibilityError;
-                    resolver.writeBaseConstructorTypeOfClass(enclosingDeclaration, enclosingDeclaration, 2 /* UseTypeOfFunction */ | 1024 /* UseTypeAliasValue */, writer);
-                }
-                function getHeritageClauseVisibilityError(symbolAccessibilityResult) {
-                    var diagnosticMessage;
-                    // Heritage clause is written by user so it can always be named
-                    if (node.parent.parent.kind === 221 /* ClassDeclaration */) {
-                        // Class or Interface implemented/extended is inaccessible
-                        diagnosticMessage = isImplementsList ?
-                            ts.Diagnostics.Implements_clause_of_exported_class_0_has_or_is_using_private_name_1 :
-                            ts.Diagnostics.Extends_clause_of_exported_class_0_has_or_is_using_private_name_1;
-                    }
-                    else {
-                        // interface is inaccessible
-                        diagnosticMessage = ts.Diagnostics.Extends_clause_of_exported_interface_0_has_or_is_using_private_name_1;
-                    }
-                    return {
-                        diagnosticMessage: diagnosticMessage,
-                        errorNode: node,
-                        typeName: node.parent.parent.name
-                    };
-                }
-            }
+    }
+    ts.createMemberAccessForPropertyName = createMemberAccessForPropertyName;
+    function createFunctionCall(func, thisArg, argumentsList, location) {
+        return ts.setTextRange(ts.createCall(ts.createPropertyAccess(func, "call"), 
+        /*typeArguments*/ undefined, [
+            thisArg
+        ].concat(argumentsList)), location);
+    }
+    ts.createFunctionCall = createFunctionCall;
+    function createFunctionApply(func, thisArg, argumentsExpression, location) {
+        return ts.setTextRange(ts.createCall(ts.createPropertyAccess(func, "apply"), 
+        /*typeArguments*/ undefined, [
+            thisArg,
+            argumentsExpression
+        ]), location);
+    }
+    ts.createFunctionApply = createFunctionApply;
+    function createArraySlice(array, start) {
+        var argumentsList = [];
+        if (start !== undefined) {
+            argumentsList.push(typeof start === "number" ? ts.createLiteral(start) : start);
         }
-        function writeClassDeclaration(node) {
-            function emitParameterProperties(constructorDeclaration) {
-                if (constructorDeclaration) {
-                    ts.forEach(constructorDeclaration.parameters, function (param) {
-                        if (ts.hasModifier(param, 92 /* ParameterPropertyModifier */)) {
-                            emitPropertyDeclaration(param);
-                        }
-                    });
-                }
-            }
-            emitJsDocComments(node);
-            emitModuleElementDeclarationFlags(node);
-            if (ts.hasModifier(node, 128 /* Abstract */)) {
-                write("abstract ");
-            }
-            write("class ");
-            writeTextOfNode(currentText, node.name);
-            var prevEnclosingDeclaration = enclosingDeclaration;
-            enclosingDeclaration = node;
-            emitTypeParameters(node.typeParameters);
-            var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
-            if (baseTypeNode) {
-                emitHeritageClause([baseTypeNode], /*isImplementsList*/ false);
-            }
-            emitHeritageClause(ts.getClassImplementsHeritageClauseElements(node), /*isImplementsList*/ true);
-            write(" {");
-            writeLine();
-            increaseIndent();
-            emitParameterProperties(ts.getFirstConstructorWithBody(node));
-            emitLines(node.members);
-            decreaseIndent();
-            write("}");
-            writeLine();
-            enclosingDeclaration = prevEnclosingDeclaration;
+        return ts.createCall(ts.createPropertyAccess(array, "slice"), /*typeArguments*/ undefined, argumentsList);
+    }
+    ts.createArraySlice = createArraySlice;
+    function createArrayConcat(array, values) {
+        return ts.createCall(ts.createPropertyAccess(array, "concat"), 
+        /*typeArguments*/ undefined, values);
+    }
+    ts.createArrayConcat = createArrayConcat;
+    function createMathPow(left, right, location) {
+        return ts.setTextRange(ts.createCall(ts.createPropertyAccess(ts.createIdentifier("Math"), "pow"), 
+        /*typeArguments*/ undefined, [left, right]), location);
+    }
+    ts.createMathPow = createMathPow;
+    function createReactNamespace(reactNamespace, parent) {
+        // To ensure the emit resolver can properly resolve the namespace, we need to
+        // treat this identifier as if it were a source tree node by clearing the `Synthesized`
+        // flag and setting a parent node.
+        var react = ts.createIdentifier(reactNamespace || "React");
+        react.flags &= ~8 /* Synthesized */;
+        // Set the parent that is in parse tree
+        // this makes sure that parent chain is intact for checker to traverse complete scope tree
+        react.parent = ts.getParseTreeNode(parent);
+        return react;
+    }
+    function createJsxFactoryExpressionFromEntityName(jsxFactory, parent) {
+        if (ts.isQualifiedName(jsxFactory)) {
+            var left = createJsxFactoryExpressionFromEntityName(jsxFactory.left, parent);
+            var right = ts.createIdentifier(jsxFactory.right.text);
+            right.text = jsxFactory.right.text;
+            return ts.createPropertyAccess(left, right);
         }
-        function writeInterfaceDeclaration(node) {
-            emitJsDocComments(node);
-            emitModuleElementDeclarationFlags(node);
-            write("interface ");
-            writeTextOfNode(currentText, node.name);
-            var prevEnclosingDeclaration = enclosingDeclaration;
-            enclosingDeclaration = node;
-            emitTypeParameters(node.typeParameters);
-            emitHeritageClause(ts.getInterfaceBaseTypeNodes(node), /*isImplementsList*/ false);
-            write(" {");
-            writeLine();
-            increaseIndent();
-            emitLines(node.members);
-            decreaseIndent();
-            write("}");
-            writeLine();
-            enclosingDeclaration = prevEnclosingDeclaration;
+        else {
+            return createReactNamespace(jsxFactory.text, parent);
         }
-        function emitPropertyDeclaration(node) {
-            if (ts.hasDynamicName(node)) {
-                return;
-            }
-            emitJsDocComments(node);
-            emitClassMemberDeclarationFlags(ts.getModifierFlags(node));
-            emitVariableDeclaration(node);
-            write(";");
-            writeLine();
+    }
+    function createJsxFactoryExpression(jsxFactoryEntity, reactNamespace, parent) {
+        return jsxFactoryEntity ?
+            createJsxFactoryExpressionFromEntityName(jsxFactoryEntity, parent) :
+            ts.createPropertyAccess(createReactNamespace(reactNamespace, parent), "createElement");
+    }
+    function createExpressionForJsxElement(jsxFactoryEntity, reactNamespace, tagName, props, children, parentElement, location) {
+        var argumentsList = [tagName];
+        if (props) {
+            argumentsList.push(props);
         }
-        function emitVariableDeclaration(node) {
-            // If we are emitting property it isn't moduleElement and hence we already know it needs to be emitted
-            // so there is no check needed to see if declaration is visible
-            if (node.kind !== 218 /* VariableDeclaration */ || resolver.isDeclarationVisible(node)) {
-                if (ts.isBindingPattern(node.name)) {
-                    emitBindingPattern(node.name);
-                }
-                else {
-                    // If this node is a computed name, it can only be a symbol, because we've already skipped
-                    // it if it's not a well known symbol. In that case, the text of the name will be exactly
-                    // what we want, namely the name expression enclosed in brackets.
-                    writeTextOfNode(currentText, node.name);
-                    // If optional property emit ? but in the case of parameterProperty declaration with "?" indicating optional parameter for the constructor
-                    // we don't want to emit property declaration with "?"
-                    if ((node.kind === 145 /* PropertyDeclaration */ || node.kind === 144 /* PropertySignature */ ||
-                        (node.kind === 142 /* Parameter */ && !ts.isParameterPropertyDeclaration(node))) && ts.hasQuestionToken(node)) {
-                        write("?");
-                    }
-                    if ((node.kind === 145 /* PropertyDeclaration */ || node.kind === 144 /* PropertySignature */) && node.parent.kind === 159 /* TypeLiteral */) {
-                        emitTypeOfVariableDeclarationFromTypeLiteral(node);
-                    }
-                    else if (resolver.isLiteralConstDeclaration(node)) {
-                        write(" = ");
-                        resolver.writeLiteralConstValue(node, writer);
-                    }
-                    else if (!ts.hasModifier(node, 8 /* Private */)) {
-                        writeTypeOfDeclaration(node, node.type, getVariableDeclarationTypeVisibilityError);
-                    }
-                }
-            }
-            function getVariableDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult) {
-                if (node.kind === 218 /* VariableDeclaration */) {
-                    return symbolAccessibilityResult.errorModuleName ?
-                        symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
-                            ts.Diagnostics.Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
-                            ts.Diagnostics.Exported_variable_0_has_or_is_using_name_1_from_private_module_2 :
-                        ts.Diagnostics.Exported_variable_0_has_or_is_using_private_name_1;
-                }
-                else if (node.kind === 145 /* PropertyDeclaration */ || node.kind === 144 /* PropertySignature */) {
-                    // TODO(jfreeman): Deal with computed properties in error reporting.
-                    if (ts.hasModifier(node, 32 /* Static */)) {
-                        return symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
-                                ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
-                                ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_private_name_1;
-                    }
-                    else if (node.parent.kind === 221 /* ClassDeclaration */) {
-                        return symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
-                                ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
-                                ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_private_name_1;
-                    }
-                    else {
-                        // Interfaces cannot have types that cannot be named
-                        return symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Property_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Property_0_of_exported_interface_has_or_is_using_private_name_1;
-                    }
-                }
-            }
-            function getVariableDeclarationTypeVisibilityError(symbolAccessibilityResult) {
-                var diagnosticMessage = getVariableDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult);
-                return diagnosticMessage !== undefined ? {
-                    diagnosticMessage: diagnosticMessage,
-                    errorNode: node,
-                    typeName: node.name
-                } : undefined;
-            }
-            function emitBindingPattern(bindingPattern) {
-                // Only select non-omitted expression from the bindingPattern's elements.
-                // We have to do this to avoid emitting trailing commas.
-                // For example:
-                //      original: var [, c,,] = [ 2,3,4]
-                //      emitted: declare var c: number; // instead of declare var c:number, ;
-                var elements = [];
-                for (var _i = 0, _a = bindingPattern.elements; _i < _a.length; _i++) {
-                    var element = _a[_i];
-                    if (element.kind !== 193 /* OmittedExpression */) {
-                        elements.push(element);
-                    }
-                }
-                emitCommaList(elements, emitBindingElement);
+        if (children && children.length > 0) {
+            if (!props) {
+                argumentsList.push(ts.createNull());
             }
-            function emitBindingElement(bindingElement) {
-                function getBindingElementTypeVisibilityError(symbolAccessibilityResult) {
-                    var diagnosticMessage = getVariableDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult);
-                    return diagnosticMessage !== undefined ? {
-                        diagnosticMessage: diagnosticMessage,
-                        errorNode: bindingElement,
-                        typeName: bindingElement.name
-                    } : undefined;
-                }
-                if (bindingElement.name) {
-                    if (ts.isBindingPattern(bindingElement.name)) {
-                        emitBindingPattern(bindingElement.name);
-                    }
-                    else {
-                        writeTextOfNode(currentText, bindingElement.name);
-                        writeTypeOfDeclaration(bindingElement, /*type*/ undefined, getBindingElementTypeVisibilityError);
-                    }
+            if (children.length > 1) {
+                for (var _i = 0, children_1 = children; _i < children_1.length; _i++) {
+                    var child = children_1[_i];
+                    child.startsOnNewLine = true;
+                    argumentsList.push(child);
                 }
             }
-        }
-        function emitTypeOfVariableDeclarationFromTypeLiteral(node) {
-            // if this is property of type literal,
-            // or is parameter of method/call/construct/index signature of type literal
-            // emit only if type is specified
-            if (node.type) {
-                write(": ");
-                emitType(node.type);
+            else {
+                argumentsList.push(children[0]);
             }
         }
-        function isVariableStatementVisible(node) {
-            return ts.forEach(node.declarationList.declarations, function (varDeclaration) { return resolver.isDeclarationVisible(varDeclaration); });
+        return ts.setTextRange(ts.createCall(createJsxFactoryExpression(jsxFactoryEntity, reactNamespace, parentElement), 
+        /*typeArguments*/ undefined, argumentsList), location);
+    }
+    ts.createExpressionForJsxElement = createExpressionForJsxElement;
+    // Helpers
+    function getHelperName(name) {
+        return ts.setEmitFlags(ts.createIdentifier(name), 4096 /* HelperName */ | 2 /* AdviseOnEmitNode */);
+    }
+    ts.getHelperName = getHelperName;
+    var valuesHelper = {
+        name: "typescript:values",
+        scoped: false,
+        text: "\n            var __values = (this && this.__values) || function (o) {\n                var m = typeof Symbol === \"function\" && o[Symbol.iterator], i = 0;\n                if (m) return m.call(o);\n                return {\n                    next: function () {\n                        if (o && i >= o.length) o = void 0;\n                        return { value: o && o[i++], done: !o };\n                    }\n                };\n            };\n        "
+    };
+    function createValuesHelper(context, expression, location) {
+        context.requestEmitHelper(valuesHelper);
+        return ts.setTextRange(ts.createCall(getHelperName("__values"), 
+        /*typeArguments*/ undefined, [expression]), location);
+    }
+    ts.createValuesHelper = createValuesHelper;
+    var readHelper = {
+        name: "typescript:read",
+        scoped: false,
+        text: "\n            var __read = (this && this.__read) || function (o, n) {\n                var m = typeof Symbol === \"function\" && o[Symbol.iterator];\n                if (!m) return o;\n                var i = m.call(o), r, ar = [], e;\n                try {\n                    while ((n === void 0 || n-- > 0) && !(r = i.next()).done) ar.push(r.value);\n                }\n                catch (error) { e = { error: error }; }\n                finally {\n                    try {\n                        if (r && !r.done && (m = i[\"return\"])) m.call(i);\n                    }\n                    finally { if (e) throw e.error; }\n                }\n                return ar;\n            };\n        "
+    };
+    function createReadHelper(context, iteratorRecord, count, location) {
+        context.requestEmitHelper(readHelper);
+        return ts.setTextRange(ts.createCall(getHelperName("__read"), 
+        /*typeArguments*/ undefined, count !== undefined
+            ? [iteratorRecord, ts.createLiteral(count)]
+            : [iteratorRecord]), location);
+    }
+    ts.createReadHelper = createReadHelper;
+    var spreadHelper = {
+        name: "typescript:spread",
+        scoped: false,
+        text: "\n            var __spread = (this && this.__spread) || function () {\n                for (var ar = [], i = 0; i < arguments.length; i++) ar = ar.concat(__read(arguments[i]));\n                return ar;\n            };"
+    };
+    function createSpreadHelper(context, argumentList, location) {
+        context.requestEmitHelper(readHelper);
+        context.requestEmitHelper(spreadHelper);
+        return ts.setTextRange(ts.createCall(getHelperName("__spread"), 
+        /*typeArguments*/ undefined, argumentList), location);
+    }
+    ts.createSpreadHelper = createSpreadHelper;
+    // Utilities
+    function createForOfBindingStatement(node, boundValue) {
+        if (ts.isVariableDeclarationList(node)) {
+            var firstDeclaration = ts.firstOrUndefined(node.declarations);
+            var updatedDeclaration = ts.updateVariableDeclaration(firstDeclaration, firstDeclaration.name, 
+            /*typeNode*/ undefined, boundValue);
+            return ts.setTextRange(ts.createVariableStatement(
+            /*modifiers*/ undefined, ts.updateVariableDeclarationList(node, [updatedDeclaration])), 
+            /*location*/ node);
         }
-        function writeVariableStatement(node) {
-            emitJsDocComments(node);
-            emitModuleElementDeclarationFlags(node);
-            if (ts.isLet(node.declarationList)) {
-                write("let ");
-            }
-            else if (ts.isConst(node.declarationList)) {
-                write("const ");
-            }
-            else {
-                write("var ");
-            }
-            emitCommaList(node.declarationList.declarations, emitVariableDeclaration, resolver.isDeclarationVisible);
-            write(";");
-            writeLine();
+        else {
+            var updatedExpression = ts.setTextRange(ts.createAssignment(node, boundValue), /*location*/ node);
+            return ts.setTextRange(ts.createStatement(updatedExpression), /*location*/ node);
         }
-        function emitAccessorDeclaration(node) {
-            if (ts.hasDynamicName(node)) {
-                return;
-            }
-            var accessors = ts.getAllAccessorDeclarations(node.parent.members, node);
-            var accessorWithTypeAnnotation;
-            if (node === accessors.firstAccessor) {
-                emitJsDocComments(accessors.getAccessor);
-                emitJsDocComments(accessors.setAccessor);
-                emitClassMemberDeclarationFlags(ts.getModifierFlags(node) | (accessors.setAccessor ? 0 : 64 /* Readonly */));
-                writeTextOfNode(currentText, node.name);
-                if (!ts.hasModifier(node, 8 /* Private */)) {
-                    accessorWithTypeAnnotation = node;
-                    var type = getTypeAnnotationFromAccessor(node);
-                    if (!type) {
-                        // couldn't get type for the first accessor, try the another one
-                        var anotherAccessor = node.kind === 149 /* GetAccessor */ ? accessors.setAccessor : accessors.getAccessor;
-                        type = getTypeAnnotationFromAccessor(anotherAccessor);
-                        if (type) {
-                            accessorWithTypeAnnotation = anotherAccessor;
-                        }
-                    }
-                    writeTypeOfDeclaration(node, type, getAccessorDeclarationTypeVisibilityError);
-                }
-                write(";");
-                writeLine();
-            }
-            function getTypeAnnotationFromAccessor(accessor) {
-                if (accessor) {
-                    return accessor.kind === 149 /* GetAccessor */
-                        ? accessor.type // Getter - return type
-                        : accessor.parameters.length > 0
-                            ? accessor.parameters[0].type // Setter parameter type
-                            : undefined;
+    }
+    ts.createForOfBindingStatement = createForOfBindingStatement;
+    function insertLeadingStatement(dest, source) {
+        if (ts.isBlock(dest)) {
+            return ts.updateBlock(dest, ts.setTextRange(ts.createNodeArray([source].concat(dest.statements)), dest.statements));
+        }
+        else {
+            return ts.createBlock(ts.createNodeArray([dest, source]), /*multiLine*/ true);
+        }
+    }
+    ts.insertLeadingStatement = insertLeadingStatement;
+    function restoreEnclosingLabel(node, outermostLabeledStatement, afterRestoreLabelCallback) {
+        if (!outermostLabeledStatement) {
+            return node;
+        }
+        var updated = ts.updateLabel(outermostLabeledStatement, outermostLabeledStatement.label, outermostLabeledStatement.statement.kind === 222 /* LabeledStatement */
+            ? restoreEnclosingLabel(node, outermostLabeledStatement.statement)
+            : node);
+        if (afterRestoreLabelCallback) {
+            afterRestoreLabelCallback(outermostLabeledStatement);
+        }
+        return updated;
+    }
+    ts.restoreEnclosingLabel = restoreEnclosingLabel;
+    function shouldBeCapturedInTempVariable(node, cacheIdentifiers) {
+        var target = skipParentheses(node);
+        switch (target.kind) {
+            case 71 /* Identifier */:
+                return cacheIdentifiers;
+            case 99 /* ThisKeyword */:
+            case 8 /* NumericLiteral */:
+            case 9 /* StringLiteral */:
+                return false;
+            case 177 /* ArrayLiteralExpression */:
+                var elements = target.elements;
+                if (elements.length === 0) {
+                    return false;
                 }
-            }
-            function getAccessorDeclarationTypeVisibilityError(symbolAccessibilityResult) {
-                var diagnosticMessage;
-                if (accessorWithTypeAnnotation.kind === 150 /* SetAccessor */) {
-                    // Setters have to have type named and cannot infer it so, the type should always be named
-                    if (ts.hasModifier(accessorWithTypeAnnotation.parent, 32 /* Static */)) {
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_private_name_1;
+                return true;
+            case 178 /* ObjectLiteralExpression */:
+                return target.properties.length > 0;
+            default:
+                return true;
+        }
+    }
+    function createCallBinding(expression, recordTempVariable, languageVersion, cacheIdentifiers) {
+        var callee = skipOuterExpressions(expression, 7 /* All */);
+        var thisArg;
+        var target;
+        if (ts.isSuperProperty(callee)) {
+            thisArg = ts.createThis();
+            target = callee;
+        }
+        else if (callee.kind === 97 /* SuperKeyword */) {
+            thisArg = ts.createThis();
+            target = languageVersion < 2 /* ES2015 */
+                ? ts.setTextRange(ts.createIdentifier("_super"), callee)
+                : callee;
+        }
+        else if (ts.getEmitFlags(callee) & 4096 /* HelperName */) {
+            thisArg = ts.createVoidZero();
+            target = parenthesizeForAccess(callee);
+        }
+        else {
+            switch (callee.kind) {
+                case 179 /* PropertyAccessExpression */: {
+                    if (shouldBeCapturedInTempVariable(callee.expression, cacheIdentifiers)) {
+                        // for `a.b()` target is `(_a = a).b` and thisArg is `_a`
+                        thisArg = ts.createTempVariable(recordTempVariable);
+                        target = ts.createPropertyAccess(ts.setTextRange(ts.createAssignment(thisArg, callee.expression), callee.expression), callee.name);
+                        ts.setTextRange(target, callee);
                     }
                     else {
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_private_name_1;
+                        thisArg = callee.expression;
+                        target = callee;
                     }
-                    return {
-                        diagnosticMessage: diagnosticMessage,
-                        errorNode: accessorWithTypeAnnotation.parameters[0],
-                        // TODO(jfreeman): Investigate why we are passing node.name instead of node.parameters[0].name
-                        typeName: accessorWithTypeAnnotation.name
-                    };
+                    break;
                 }
-                else {
-                    if (ts.hasModifier(accessorWithTypeAnnotation, 32 /* Static */)) {
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
-                                ts.Diagnostics.Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
-                                ts.Diagnostics.Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
-                            ts.Diagnostics.Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_private_name_0;
+                case 180 /* ElementAccessExpression */: {
+                    if (shouldBeCapturedInTempVariable(callee.expression, cacheIdentifiers)) {
+                        // for `a[b]()` target is `(_a = a)[b]` and thisArg is `_a`
+                        thisArg = ts.createTempVariable(recordTempVariable);
+                        target = ts.createElementAccess(ts.setTextRange(ts.createAssignment(thisArg, callee.expression), callee.expression), callee.argumentExpression);
+                        ts.setTextRange(target, callee);
                     }
                     else {
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
-                                ts.Diagnostics.Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
-                                ts.Diagnostics.Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
-                            ts.Diagnostics.Return_type_of_public_property_getter_from_exported_class_has_or_is_using_private_name_0;
+                        thisArg = callee.expression;
+                        target = callee;
                     }
-                    return {
-                        diagnosticMessage: diagnosticMessage,
-                        errorNode: accessorWithTypeAnnotation.name,
-                        typeName: undefined
-                    };
+                    break;
+                }
+                default: {
+                    // for `a()` target is `a` and thisArg is `void 0`
+                    thisArg = ts.createVoidZero();
+                    target = parenthesizeForAccess(expression);
+                    break;
                 }
             }
         }
-        function writeFunctionDeclaration(node) {
-            if (ts.hasDynamicName(node)) {
-                return;
+        return { target: target, thisArg: thisArg };
+    }
+    ts.createCallBinding = createCallBinding;
+    function inlineExpressions(expressions) {
+        // Avoid deeply nested comma expressions as traversing them during emit can result in "Maximum call
+        // stack size exceeded" errors.
+        return expressions.length > 10
+            ? ts.createCommaList(expressions)
+            : ts.reduceLeft(expressions, ts.createComma);
+    }
+    ts.inlineExpressions = inlineExpressions;
+    function createExpressionFromEntityName(node) {
+        if (ts.isQualifiedName(node)) {
+            var left = createExpressionFromEntityName(node.left);
+            var right = ts.getMutableClone(node.right);
+            return ts.setTextRange(ts.createPropertyAccess(left, right), node);
+        }
+        else {
+            return ts.getMutableClone(node);
+        }
+    }
+    ts.createExpressionFromEntityName = createExpressionFromEntityName;
+    function createExpressionForPropertyName(memberName) {
+        if (ts.isIdentifier(memberName)) {
+            return ts.createLiteral(memberName);
+        }
+        else if (ts.isComputedPropertyName(memberName)) {
+            return ts.getMutableClone(memberName.expression);
+        }
+        else {
+            return ts.getMutableClone(memberName);
+        }
+    }
+    ts.createExpressionForPropertyName = createExpressionForPropertyName;
+    function createExpressionForObjectLiteralElementLike(node, property, receiver) {
+        switch (property.kind) {
+            case 153 /* GetAccessor */:
+            case 154 /* SetAccessor */:
+                return createExpressionForAccessorDeclaration(node.properties, property, receiver, node.multiLine);
+            case 261 /* PropertyAssignment */:
+                return createExpressionForPropertyAssignment(property, receiver);
+            case 262 /* ShorthandPropertyAssignment */:
+                return createExpressionForShorthandPropertyAssignment(property, receiver);
+            case 151 /* MethodDeclaration */:
+                return createExpressionForMethodDeclaration(property, receiver);
+        }
+    }
+    ts.createExpressionForObjectLiteralElementLike = createExpressionForObjectLiteralElementLike;
+    function createExpressionForAccessorDeclaration(properties, property, receiver, multiLine) {
+        var _a = ts.getAllAccessorDeclarations(properties, property), firstAccessor = _a.firstAccessor, getAccessor = _a.getAccessor, setAccessor = _a.setAccessor;
+        if (property === firstAccessor) {
+            var properties_8 = [];
+            if (getAccessor) {
+                var getterFunction = ts.createFunctionExpression(getAccessor.modifiers, 
+                /*asteriskToken*/ undefined, 
+                /*name*/ undefined, 
+                /*typeParameters*/ undefined, getAccessor.parameters, 
+                /*type*/ undefined, getAccessor.body);
+                ts.setTextRange(getterFunction, getAccessor);
+                ts.setOriginalNode(getterFunction, getAccessor);
+                var getter = ts.createPropertyAssignment("get", getterFunction);
+                properties_8.push(getter);
             }
-            // If we are emitting Method/Constructor it isn't moduleElement and hence already determined to be emitting
-            // so no need to verify if the declaration is visible
-            if (!resolver.isImplementationOfOverload(node)) {
-                emitJsDocComments(node);
-                if (node.kind === 220 /* FunctionDeclaration */) {
-                    emitModuleElementDeclarationFlags(node);
-                }
-                else if (node.kind === 147 /* MethodDeclaration */ || node.kind === 148 /* Constructor */) {
-                    emitClassMemberDeclarationFlags(ts.getModifierFlags(node));
-                }
-                if (node.kind === 220 /* FunctionDeclaration */) {
-                    write("function ");
-                    writeTextOfNode(currentText, node.name);
-                }
-                else if (node.kind === 148 /* Constructor */) {
-                    write("constructor");
-                }
-                else {
-                    writeTextOfNode(currentText, node.name);
-                    if (ts.hasQuestionToken(node)) {
-                        write("?");
-                    }
-                }
-                emitSignatureDeclaration(node);
+            if (setAccessor) {
+                var setterFunction = ts.createFunctionExpression(setAccessor.modifiers, 
+                /*asteriskToken*/ undefined, 
+                /*name*/ undefined, 
+                /*typeParameters*/ undefined, setAccessor.parameters, 
+                /*type*/ undefined, setAccessor.body);
+                ts.setTextRange(setterFunction, setAccessor);
+                ts.setOriginalNode(setterFunction, setAccessor);
+                var setter = ts.createPropertyAssignment("set", setterFunction);
+                properties_8.push(setter);
             }
+            properties_8.push(ts.createPropertyAssignment("enumerable", ts.createTrue()));
+            properties_8.push(ts.createPropertyAssignment("configurable", ts.createTrue()));
+            var expression = ts.setTextRange(ts.createCall(ts.createPropertyAccess(ts.createIdentifier("Object"), "defineProperty"), 
+            /*typeArguments*/ undefined, [
+                receiver,
+                createExpressionForPropertyName(property.name),
+                ts.createObjectLiteral(properties_8, multiLine)
+            ]), 
+            /*location*/ firstAccessor);
+            return ts.aggregateTransformFlags(expression);
         }
-        function emitSignatureDeclarationWithJsDocComments(node) {
-            emitJsDocComments(node);
-            emitSignatureDeclaration(node);
+        return undefined;
+    }
+    function createExpressionForPropertyAssignment(property, receiver) {
+        return ts.aggregateTransformFlags(ts.setOriginalNode(ts.setTextRange(ts.createAssignment(createMemberAccessForPropertyName(receiver, property.name, /*location*/ property.name), property.initializer), property), property));
+    }
+    function createExpressionForShorthandPropertyAssignment(property, receiver) {
+        return ts.aggregateTransformFlags(ts.setOriginalNode(ts.setTextRange(ts.createAssignment(createMemberAccessForPropertyName(receiver, property.name, /*location*/ property.name), ts.getSynthesizedClone(property.name)), 
+        /*location*/ property), 
+        /*original*/ property));
+    }
+    function createExpressionForMethodDeclaration(method, receiver) {
+        return ts.aggregateTransformFlags(ts.setOriginalNode(ts.setTextRange(ts.createAssignment(createMemberAccessForPropertyName(receiver, method.name, /*location*/ method.name), ts.setOriginalNode(ts.setTextRange(ts.createFunctionExpression(method.modifiers, method.asteriskToken, 
+        /*name*/ undefined, 
+        /*typeParameters*/ undefined, method.parameters, 
+        /*type*/ undefined, method.body), 
+        /*location*/ method), 
+        /*original*/ method)), 
+        /*location*/ method), 
+        /*original*/ method));
+    }
+    /**
+     * Gets the internal name of a declaration. This is primarily used for declarations that can be
+     * referred to by name in the body of an ES5 class function body. An internal name will *never*
+     * be prefixed with an module or namespace export modifier like "exports." when emitted as an
+     * expression. An internal name will also *never* be renamed due to a collision with a block
+     * scoped variable.
+     *
+     * @param node The declaration.
+     * @param allowComments A value indicating whether comments may be emitted for the name.
+     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
+     */
+    function getInternalName(node, allowComments, allowSourceMaps) {
+        return getName(node, allowComments, allowSourceMaps, 16384 /* LocalName */ | 32768 /* InternalName */);
+    }
+    ts.getInternalName = getInternalName;
+    /**
+     * Gets whether an identifier should only be referred to by its internal name.
+     */
+    function isInternalName(node) {
+        return (ts.getEmitFlags(node) & 32768 /* InternalName */) !== 0;
+    }
+    ts.isInternalName = isInternalName;
+    /**
+     * Gets the local name of a declaration. This is primarily used for declarations that can be
+     * referred to by name in the declaration's immediate scope (classes, enums, namespaces). A
+     * local name will *never* be prefixed with an module or namespace export modifier like
+     * "exports." when emitted as an expression.
+     *
+     * @param node The declaration.
+     * @param allowComments A value indicating whether comments may be emitted for the name.
+     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
+     */
+    function getLocalName(node, allowComments, allowSourceMaps) {
+        return getName(node, allowComments, allowSourceMaps, 16384 /* LocalName */);
+    }
+    ts.getLocalName = getLocalName;
+    /**
+     * Gets whether an identifier should only be referred to by its local name.
+     */
+    function isLocalName(node) {
+        return (ts.getEmitFlags(node) & 16384 /* LocalName */) !== 0;
+    }
+    ts.isLocalName = isLocalName;
+    /**
+     * Gets the export name of a declaration. This is primarily used for declarations that can be
+     * referred to by name in the declaration's immediate scope (classes, enums, namespaces). An
+     * export name will *always* be prefixed with an module or namespace export modifier like
+     * `"exports."` when emitted as an expression if the name points to an exported symbol.
+     *
+     * @param node The declaration.
+     * @param allowComments A value indicating whether comments may be emitted for the name.
+     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
+     */
+    function getExportName(node, allowComments, allowSourceMaps) {
+        return getName(node, allowComments, allowSourceMaps, 8192 /* ExportName */);
+    }
+    ts.getExportName = getExportName;
+    /**
+     * Gets whether an identifier should only be referred to by its export representation if the
+     * name points to an exported symbol.
+     */
+    function isExportName(node) {
+        return (ts.getEmitFlags(node) & 8192 /* ExportName */) !== 0;
+    }
+    ts.isExportName = isExportName;
+    /**
+     * Gets the name of a declaration for use in declarations.
+     *
+     * @param node The declaration.
+     * @param allowComments A value indicating whether comments may be emitted for the name.
+     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
+     */
+    function getDeclarationName(node, allowComments, allowSourceMaps) {
+        return getName(node, allowComments, allowSourceMaps);
+    }
+    ts.getDeclarationName = getDeclarationName;
+    function getName(node, allowComments, allowSourceMaps, emitFlags) {
+        var nodeName = ts.getNameOfDeclaration(node);
+        if (nodeName && ts.isIdentifier(nodeName) && !ts.isGeneratedIdentifier(nodeName)) {
+            var name_40 = ts.getMutableClone(nodeName);
+            emitFlags |= ts.getEmitFlags(nodeName);
+            if (!allowSourceMaps)
+                emitFlags |= 48 /* NoSourceMap */;
+            if (!allowComments)
+                emitFlags |= 1536 /* NoComments */;
+            if (emitFlags)
+                ts.setEmitFlags(name_40, emitFlags);
+            return name_40;
+        }
+        return ts.getGeneratedNameForNode(node);
+    }
+    /**
+     * Gets the exported name of a declaration for use in expressions.
+     *
+     * An exported name will *always* be prefixed with an module or namespace export modifier like
+     * "exports." if the name points to an exported symbol.
+     *
+     * @param ns The namespace identifier.
+     * @param node The declaration.
+     * @param allowComments A value indicating whether comments may be emitted for the name.
+     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
+     */
+    function getExternalModuleOrNamespaceExportName(ns, node, allowComments, allowSourceMaps) {
+        if (ns && ts.hasModifier(node, 1 /* Export */)) {
+            return getNamespaceMemberName(ns, getName(node), allowComments, allowSourceMaps);
         }
-        function emitSignatureDeclaration(node) {
-            var prevEnclosingDeclaration = enclosingDeclaration;
-            enclosingDeclaration = node;
-            var closeParenthesizedFunctionType = false;
-            if (node.kind === 153 /* IndexSignature */) {
-                // Index signature can have readonly modifier
-                emitClassMemberDeclarationFlags(ts.getModifierFlags(node));
-                write("[");
+        return getExportName(node, allowComments, allowSourceMaps);
+    }
+    ts.getExternalModuleOrNamespaceExportName = getExternalModuleOrNamespaceExportName;
+    /**
+     * Gets a namespace-qualified name for use in expressions.
+     *
+     * @param ns The namespace identifier.
+     * @param name The name.
+     * @param allowComments A value indicating whether comments may be emitted for the name.
+     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
+     */
+    function getNamespaceMemberName(ns, name, allowComments, allowSourceMaps) {
+        var qualifiedName = ts.createPropertyAccess(ns, ts.nodeIsSynthesized(name) ? name : ts.getSynthesizedClone(name));
+        ts.setTextRange(qualifiedName, name);
+        var emitFlags;
+        if (!allowSourceMaps)
+            emitFlags |= 48 /* NoSourceMap */;
+        if (!allowComments)
+            emitFlags |= 1536 /* NoComments */;
+        if (emitFlags)
+            ts.setEmitFlags(qualifiedName, emitFlags);
+        return qualifiedName;
+    }
+    ts.getNamespaceMemberName = getNamespaceMemberName;
+    function convertToFunctionBody(node, multiLine) {
+        return ts.isBlock(node) ? node : ts.setTextRange(ts.createBlock([ts.setTextRange(ts.createReturn(node), node)], multiLine), node);
+    }
+    ts.convertToFunctionBody = convertToFunctionBody;
+    function convertFunctionDeclarationToExpression(node) {
+        ts.Debug.assert(!!node.body);
+        var updated = ts.createFunctionExpression(node.modifiers, node.asteriskToken, node.name, node.typeParameters, node.parameters, node.type, node.body);
+        ts.setOriginalNode(updated, node);
+        ts.setTextRange(updated, node);
+        if (node.startsOnNewLine) {
+            updated.startsOnNewLine = true;
+        }
+        ts.aggregateTransformFlags(updated);
+        return updated;
+    }
+    ts.convertFunctionDeclarationToExpression = convertFunctionDeclarationToExpression;
+    function isUseStrictPrologue(node) {
+        return node.expression.text === "use strict";
+    }
+    /**
+     * Add any necessary prologue-directives into target statement-array.
+     * The function needs to be called during each transformation step.
+     * This function needs to be called whenever we transform the statement
+     * list of a source file, namespace, or function-like body.
+     *
+     * @param target: result statements array
+     * @param source: origin statements array
+     * @param ensureUseStrict: boolean determining whether the function need to add prologue-directives
+     * @param visitor: Optional callback used to visit any custom prologue directives.
+     */
+    function addPrologue(target, source, ensureUseStrict, visitor) {
+        var offset = addStandardPrologue(target, source, ensureUseStrict);
+        return addCustomPrologue(target, source, offset, visitor);
+    }
+    ts.addPrologue = addPrologue;
+    /**
+     * Add just the standard (string-expression) prologue-directives into target statement-array.
+     * The function needs to be called during each transformation step.
+     * This function needs to be called whenever we transform the statement
+     * list of a source file, namespace, or function-like body.
+     */
+    function addStandardPrologue(target, source, ensureUseStrict) {
+        ts.Debug.assert(target.length === 0, "Prologue directives should be at the first statement in the target statements array");
+        var foundUseStrict = false;
+        var statementOffset = 0;
+        var numStatements = source.length;
+        while (statementOffset < numStatements) {
+            var statement = source[statementOffset];
+            if (ts.isPrologueDirective(statement)) {
+                if (isUseStrictPrologue(statement)) {
+                    foundUseStrict = true;
+                }
+                target.push(statement);
             }
             else {
-                // Construct signature or constructor type write new Signature
-                if (node.kind === 152 /* ConstructSignature */ || node.kind === 157 /* ConstructorType */) {
-                    write("new ");
-                }
-                else if (node.kind === 156 /* FunctionType */) {
-                    var currentOutput = writer.getText();
-                    // Do not generate incorrect type when function type with type parameters is type argument
-                    // This could happen if user used space between two '<' making it error free
-                    // e.g var x: A< <Tany>(a: Tany)=>Tany>;
-                    if (node.typeParameters && currentOutput.charAt(currentOutput.length - 1) === "<") {
-                        closeParenthesizedFunctionType = true;
-                        write("(");
-                    }
-                }
-                emitTypeParameters(node.typeParameters);
-                write("(");
+                break;
             }
-            // Parameters
-            emitCommaList(node.parameters, emitParameterDeclaration);
-            if (node.kind === 153 /* IndexSignature */) {
-                write("]");
+            statementOffset++;
+        }
+        if (ensureUseStrict && !foundUseStrict) {
+            target.push(startOnNewLine(ts.createStatement(ts.createLiteral("use strict"))));
+        }
+        return statementOffset;
+    }
+    ts.addStandardPrologue = addStandardPrologue;
+    /**
+     * Add just the custom prologue-directives into target statement-array.
+     * The function needs to be called during each transformation step.
+     * This function needs to be called whenever we transform the statement
+     * list of a source file, namespace, or function-like body.
+     */
+    function addCustomPrologue(target, source, statementOffset, visitor) {
+        var numStatements = source.length;
+        while (statementOffset < numStatements) {
+            var statement = source[statementOffset];
+            if (ts.getEmitFlags(statement) & 1048576 /* CustomPrologue */) {
+                target.push(visitor ? ts.visitNode(statement, visitor, ts.isStatement) : statement);
             }
             else {
-                write(")");
+                break;
             }
-            // If this is not a constructor and is not private, emit the return type
-            var isFunctionTypeOrConstructorType = node.kind === 156 /* FunctionType */ || node.kind === 157 /* ConstructorType */;
-            if (isFunctionTypeOrConstructorType || node.parent.kind === 159 /* TypeLiteral */) {
-                // Emit type literal signature return type only if specified
-                if (node.type) {
-                    write(isFunctionTypeOrConstructorType ? " => " : ": ");
-                    emitType(node.type);
+            statementOffset++;
+        }
+        return statementOffset;
+    }
+    ts.addCustomPrologue = addCustomPrologue;
+    function startsWithUseStrict(statements) {
+        var firstStatement = ts.firstOrUndefined(statements);
+        return firstStatement !== undefined
+            && ts.isPrologueDirective(firstStatement)
+            && isUseStrictPrologue(firstStatement);
+    }
+    ts.startsWithUseStrict = startsWithUseStrict;
+    /**
+     * Ensures "use strict" directive is added
+     *
+     * @param statements An array of statements
+     */
+    function ensureUseStrict(statements) {
+        var foundUseStrict = false;
+        for (var _i = 0, statements_3 = statements; _i < statements_3.length; _i++) {
+            var statement = statements_3[_i];
+            if (ts.isPrologueDirective(statement)) {
+                if (isUseStrictPrologue(statement)) {
+                    foundUseStrict = true;
+                    break;
                 }
             }
-            else if (node.kind !== 148 /* Constructor */ && !ts.hasModifier(node, 8 /* Private */)) {
-                writeReturnTypeAtSignature(node, getReturnTypeVisibilityError);
-            }
-            enclosingDeclaration = prevEnclosingDeclaration;
-            if (!isFunctionTypeOrConstructorType) {
-                write(";");
-                writeLine();
-            }
-            else if (closeParenthesizedFunctionType) {
-                write(")");
+            else {
+                break;
             }
-            function getReturnTypeVisibilityError(symbolAccessibilityResult) {
-                var diagnosticMessage;
-                switch (node.kind) {
-                    case 152 /* ConstructSignature */:
-                        // Interfaces cannot have return types that cannot be named
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
-                            ts.Diagnostics.Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_0;
-                        break;
-                    case 151 /* CallSignature */:
-                        // Interfaces cannot have return types that cannot be named
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Return_type_of_call_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
-                            ts.Diagnostics.Return_type_of_call_signature_from_exported_interface_has_or_is_using_private_name_0;
-                        break;
-                    case 153 /* IndexSignature */:
-                        // Interfaces cannot have return types that cannot be named
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Return_type_of_index_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
-                            ts.Diagnostics.Return_type_of_index_signature_from_exported_interface_has_or_is_using_private_name_0;
-                        break;
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                        if (ts.hasModifier(node, 32 /* Static */)) {
-                            diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                                symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
-                                    ts.Diagnostics.Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
-                                    ts.Diagnostics.Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
-                                ts.Diagnostics.Return_type_of_public_static_method_from_exported_class_has_or_is_using_private_name_0;
-                        }
-                        else if (node.parent.kind === 221 /* ClassDeclaration */) {
-                            diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                                symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
-                                    ts.Diagnostics.Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
-                                    ts.Diagnostics.Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
-                                ts.Diagnostics.Return_type_of_public_method_from_exported_class_has_or_is_using_private_name_0;
+        }
+        if (!foundUseStrict) {
+            return ts.setTextRange(ts.createNodeArray([
+                startOnNewLine(ts.createStatement(ts.createLiteral("use strict")))
+            ].concat(statements)), statements);
+        }
+        return statements;
+    }
+    ts.ensureUseStrict = ensureUseStrict;
+    /**
+     * Wraps the operand to a BinaryExpression in parentheses if they are needed to preserve the intended
+     * order of operations.
+     *
+     * @param binaryOperator The operator for the BinaryExpression.
+     * @param operand The operand for the BinaryExpression.
+     * @param isLeftSideOfBinary A value indicating whether the operand is the left side of the
+     *                           BinaryExpression.
+     */
+    function parenthesizeBinaryOperand(binaryOperator, operand, isLeftSideOfBinary, leftOperand) {
+        var skipped = ts.skipPartiallyEmittedExpressions(operand);
+        // If the resulting expression is already parenthesized, we do not need to do any further processing.
+        if (skipped.kind === 185 /* ParenthesizedExpression */) {
+            return operand;
+        }
+        return binaryOperandNeedsParentheses(binaryOperator, operand, isLeftSideOfBinary, leftOperand)
+            ? ts.createParen(operand)
+            : operand;
+    }
+    ts.parenthesizeBinaryOperand = parenthesizeBinaryOperand;
+    /**
+     * Determines whether the operand to a BinaryExpression needs to be parenthesized.
+     *
+     * @param binaryOperator The operator for the BinaryExpression.
+     * @param operand The operand for the BinaryExpression.
+     * @param isLeftSideOfBinary A value indicating whether the operand is the left side of the
+     *                           BinaryExpression.
+     */
+    function binaryOperandNeedsParentheses(binaryOperator, operand, isLeftSideOfBinary, leftOperand) {
+        // If the operand has lower precedence, then it needs to be parenthesized to preserve the
+        // intent of the expression. For example, if the operand is `a + b` and the operator is
+        // `*`, then we need to parenthesize the operand to preserve the intended order of
+        // operations: `(a + b) * x`.
+        //
+        // If the operand has higher precedence, then it does not need to be parenthesized. For
+        // example, if the operand is `a * b` and the operator is `+`, then we do not need to
+        // parenthesize to preserve the intended order of operations: `a * b + x`.
+        //
+        // If the operand has the same precedence, then we need to check the associativity of
+        // the operator based on whether this is the left or right operand of the expression.
+        //
+        // For example, if `a / d` is on the right of operator `*`, we need to parenthesize
+        // to preserve the intended order of operations: `x * (a / d)`
+        //
+        // If `a ** d` is on the left of operator `**`, we need to parenthesize to preserve
+        // the intended order of operations: `(a ** b) ** c`
+        var binaryOperatorPrecedence = ts.getOperatorPrecedence(194 /* BinaryExpression */, binaryOperator);
+        var binaryOperatorAssociativity = ts.getOperatorAssociativity(194 /* BinaryExpression */, binaryOperator);
+        var emittedOperand = ts.skipPartiallyEmittedExpressions(operand);
+        var operandPrecedence = ts.getExpressionPrecedence(emittedOperand);
+        switch (ts.compareValues(operandPrecedence, binaryOperatorPrecedence)) {
+            case -1 /* LessThan */:
+                // If the operand is the right side of a right-associative binary operation
+                // and is a yield expression, then we do not need parentheses.
+                if (!isLeftSideOfBinary
+                    && binaryOperatorAssociativity === 1 /* Right */
+                    && operand.kind === 197 /* YieldExpression */) {
+                    return false;
+                }
+                return true;
+            case 1 /* GreaterThan */:
+                return false;
+            case 0 /* EqualTo */:
+                if (isLeftSideOfBinary) {
+                    // No need to parenthesize the left operand when the binary operator is
+                    // left associative:
+                    //  (a*b)/x    ->  a*b/x
+                    //  (a**b)/x   ->  a**b/x
+                    //
+                    // Parentheses are needed for the left operand when the binary operator is
+                    // right associative:
+                    //  (a/b)**x   ->  (a/b)**x
+                    //  (a**b)**x  ->  (a**b)**x
+                    return binaryOperatorAssociativity === 1 /* Right */;
+                }
+                else {
+                    if (ts.isBinaryExpression(emittedOperand)
+                        && emittedOperand.operatorToken.kind === binaryOperator) {
+                        // No need to parenthesize the right operand when the binary operator and
+                        // operand are the same and one of the following:
+                        //  x*(a*b)     => x*a*b
+                        //  x|(a|b)     => x|a|b
+                        //  x&(a&b)     => x&a&b
+                        //  x^(a^b)     => x^a^b
+                        if (operatorHasAssociativeProperty(binaryOperator)) {
+                            return false;
                         }
-                        else {
-                            // Interfaces cannot have return types that cannot be named
-                            diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                                ts.Diagnostics.Return_type_of_method_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
-                                ts.Diagnostics.Return_type_of_method_from_exported_interface_has_or_is_using_private_name_0;
+                        // No need to parenthesize the right operand when the binary operator
+                        // is plus (+) if both the left and right operands consist solely of either
+                        // literals of the same kind or binary plus (+) expressions for literals of
+                        // the same kind (recursively).
+                        //  "a"+(1+2)       => "a"+(1+2)
+                        //  "a"+("b"+"c")   => "a"+"b"+"c"
+                        if (binaryOperator === 37 /* PlusToken */) {
+                            var leftKind = leftOperand ? getLiteralKindOfBinaryPlusOperand(leftOperand) : 0 /* Unknown */;
+                            if (ts.isLiteralKind(leftKind) && leftKind === getLiteralKindOfBinaryPlusOperand(emittedOperand)) {
+                                return false;
+                            }
                         }
-                        break;
-                    case 220 /* FunctionDeclaration */:
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
-                                ts.Diagnostics.Return_type_of_exported_function_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
-                                ts.Diagnostics.Return_type_of_exported_function_has_or_is_using_name_0_from_private_module_1 :
-                            ts.Diagnostics.Return_type_of_exported_function_has_or_is_using_private_name_0;
-                        break;
-                    default:
-                        ts.Debug.fail("This is unknown kind for signature: " + node.kind);
+                    }
+                    // No need to parenthesize the right operand when the operand is right
+                    // associative:
+                    //  x/(a**b)    -> x/a**b
+                    //  x**(a**b)   -> x**a**b
+                    //
+                    // Parentheses are needed for the right operand when the operand is left
+                    // associative:
+                    //  x/(a*b)     -> x/(a*b)
+                    //  x**(a/b)    -> x**(a/b)
+                    var operandAssociativity = ts.getExpressionAssociativity(emittedOperand);
+                    return operandAssociativity === 0 /* Left */;
+                }
+        }
+    }
+    /**
+     * Determines whether a binary operator is mathematically associative.
+     *
+     * @param binaryOperator The binary operator.
+     */
+    function operatorHasAssociativeProperty(binaryOperator) {
+        // The following operators are associative in JavaScript:
+        //  (a*b)*c     -> a*(b*c)  -> a*b*c
+        //  (a|b)|c     -> a|(b|c)  -> a|b|c
+        //  (a&b)&c     -> a&(b&c)  -> a&b&c
+        //  (a^b)^c     -> a^(b^c)  -> a^b^c
+        //
+        // While addition is associative in mathematics, JavaScript's `+` is not
+        // guaranteed to be associative as it is overloaded with string concatenation.
+        return binaryOperator === 39 /* AsteriskToken */
+            || binaryOperator === 49 /* BarToken */
+            || binaryOperator === 48 /* AmpersandToken */
+            || binaryOperator === 50 /* CaretToken */;
+    }
+    /**
+     * This function determines whether an expression consists of a homogeneous set of
+     * literal expressions or binary plus expressions that all share the same literal kind.
+     * It is used to determine whether the right-hand operand of a binary plus expression can be
+     * emitted without parentheses.
+     */
+    function getLiteralKindOfBinaryPlusOperand(node) {
+        node = ts.skipPartiallyEmittedExpressions(node);
+        if (ts.isLiteralKind(node.kind)) {
+            return node.kind;
+        }
+        if (node.kind === 194 /* BinaryExpression */ && node.operatorToken.kind === 37 /* PlusToken */) {
+            if (node.cachedLiteralKind !== undefined) {
+                return node.cachedLiteralKind;
+            }
+            var leftKind = getLiteralKindOfBinaryPlusOperand(node.left);
+            var literalKind = ts.isLiteralKind(leftKind)
+                && leftKind === getLiteralKindOfBinaryPlusOperand(node.right)
+                ? leftKind
+                : 0 /* Unknown */;
+            node.cachedLiteralKind = literalKind;
+            return literalKind;
+        }
+        return 0 /* Unknown */;
+    }
+    function parenthesizeForConditionalHead(condition) {
+        var conditionalPrecedence = ts.getOperatorPrecedence(195 /* ConditionalExpression */, 55 /* QuestionToken */);
+        var emittedCondition = ts.skipPartiallyEmittedExpressions(condition);
+        var conditionPrecedence = ts.getExpressionPrecedence(emittedCondition);
+        if (ts.compareValues(conditionPrecedence, conditionalPrecedence) === -1 /* LessThan */) {
+            return ts.createParen(condition);
+        }
+        return condition;
+    }
+    ts.parenthesizeForConditionalHead = parenthesizeForConditionalHead;
+    function parenthesizeSubexpressionOfConditionalExpression(e) {
+        // per ES grammar both 'whenTrue' and 'whenFalse' parts of conditional expression are assignment expressions
+        // so in case when comma expression is introduced as a part of previous transformations
+        // if should be wrapped in parens since comma operator has the lowest precedence
+        return e.kind === 194 /* BinaryExpression */ && e.operatorToken.kind === 26 /* CommaToken */
+            ? ts.createParen(e)
+            : e;
+    }
+    ts.parenthesizeSubexpressionOfConditionalExpression = parenthesizeSubexpressionOfConditionalExpression;
+    /**
+     * Wraps an expression in parentheses if it is needed in order to use the expression
+     * as the expression of a NewExpression node.
+     *
+     * @param expression The Expression node.
+     */
+    function parenthesizeForNew(expression) {
+        var emittedExpression = ts.skipPartiallyEmittedExpressions(expression);
+        switch (emittedExpression.kind) {
+            case 181 /* CallExpression */:
+                return ts.createParen(expression);
+            case 182 /* NewExpression */:
+                return emittedExpression.arguments
+                    ? expression
+                    : ts.createParen(expression);
+        }
+        return parenthesizeForAccess(expression);
+    }
+    ts.parenthesizeForNew = parenthesizeForNew;
+    /**
+     * Wraps an expression in parentheses if it is needed in order to use the expression for
+     * property or element access.
+     *
+     * @param expr The expression node.
+     */
+    function parenthesizeForAccess(expression) {
+        // isLeftHandSideExpression is almost the correct criterion for when it is not necessary
+        // to parenthesize the expression before a dot. The known exception is:
+        //
+        //    NewExpression:
+        //       new C.x        -> not the same as (new C).x
+        //
+        var emittedExpression = ts.skipPartiallyEmittedExpressions(expression);
+        if (ts.isLeftHandSideExpression(emittedExpression)
+            && (emittedExpression.kind !== 182 /* NewExpression */ || emittedExpression.arguments)) {
+            return expression;
+        }
+        return ts.setTextRange(ts.createParen(expression), expression);
+    }
+    ts.parenthesizeForAccess = parenthesizeForAccess;
+    function parenthesizePostfixOperand(operand) {
+        return ts.isLeftHandSideExpression(operand)
+            ? operand
+            : ts.setTextRange(ts.createParen(operand), operand);
+    }
+    ts.parenthesizePostfixOperand = parenthesizePostfixOperand;
+    function parenthesizePrefixOperand(operand) {
+        return ts.isUnaryExpression(operand)
+            ? operand
+            : ts.setTextRange(ts.createParen(operand), operand);
+    }
+    ts.parenthesizePrefixOperand = parenthesizePrefixOperand;
+    function parenthesizeListElements(elements) {
+        var result;
+        for (var i = 0; i < elements.length; i++) {
+            var element = parenthesizeExpressionForList(elements[i]);
+            if (result !== undefined || element !== elements[i]) {
+                if (result === undefined) {
+                    result = elements.slice(0, i);
                 }
-                return {
-                    diagnosticMessage: diagnosticMessage,
-                    errorNode: node.name || node
-                };
+                result.push(element);
             }
         }
-        function emitParameterDeclaration(node) {
-            increaseIndent();
-            emitJsDocComments(node);
-            if (node.dotDotDotToken) {
-                write("...");
-            }
-            if (ts.isBindingPattern(node.name)) {
-                // For bindingPattern, we can't simply writeTextOfNode from the source file
-                // because we want to omit the initializer and using writeTextOfNode will result in initializer get emitted.
-                // Therefore, we will have to recursively emit each element in the bindingPattern.
-                emitBindingPattern(node.name);
+        if (result !== undefined) {
+            return ts.setTextRange(ts.createNodeArray(result, elements.hasTrailingComma), elements);
+        }
+        return elements;
+    }
+    ts.parenthesizeListElements = parenthesizeListElements;
+    function parenthesizeExpressionForList(expression) {
+        var emittedExpression = ts.skipPartiallyEmittedExpressions(expression);
+        var expressionPrecedence = ts.getExpressionPrecedence(emittedExpression);
+        var commaPrecedence = ts.getOperatorPrecedence(194 /* BinaryExpression */, 26 /* CommaToken */);
+        return expressionPrecedence > commaPrecedence
+            ? expression
+            : ts.setTextRange(ts.createParen(expression), expression);
+    }
+    ts.parenthesizeExpressionForList = parenthesizeExpressionForList;
+    function parenthesizeExpressionForExpressionStatement(expression) {
+        var emittedExpression = ts.skipPartiallyEmittedExpressions(expression);
+        if (ts.isCallExpression(emittedExpression)) {
+            var callee = emittedExpression.expression;
+            var kind = ts.skipPartiallyEmittedExpressions(callee).kind;
+            if (kind === 186 /* FunctionExpression */ || kind === 187 /* ArrowFunction */) {
+                var mutableCall = ts.getMutableClone(emittedExpression);
+                mutableCall.expression = ts.setTextRange(ts.createParen(callee), callee);
+                return recreateOuterExpressions(expression, mutableCall, 4 /* PartiallyEmittedExpressions */);
             }
-            else {
-                writeTextOfNode(currentText, node.name);
+        }
+        else {
+            var leftmostExpressionKind = getLeftmostExpression(emittedExpression).kind;
+            if (leftmostExpressionKind === 178 /* ObjectLiteralExpression */ || leftmostExpressionKind === 186 /* FunctionExpression */) {
+                return ts.setTextRange(ts.createParen(expression), expression);
             }
-            if (resolver.isOptionalParameter(node)) {
-                write("?");
+        }
+        return expression;
+    }
+    ts.parenthesizeExpressionForExpressionStatement = parenthesizeExpressionForExpressionStatement;
+    function parenthesizeElementTypeMember(member) {
+        switch (member.kind) {
+            case 166 /* UnionType */:
+            case 167 /* IntersectionType */:
+            case 160 /* FunctionType */:
+            case 161 /* ConstructorType */:
+                return ts.createParenthesizedType(member);
+        }
+        return member;
+    }
+    ts.parenthesizeElementTypeMember = parenthesizeElementTypeMember;
+    function parenthesizeElementTypeMembers(members) {
+        return ts.createNodeArray(ts.sameMap(members, parenthesizeElementTypeMember));
+    }
+    ts.parenthesizeElementTypeMembers = parenthesizeElementTypeMembers;
+    function parenthesizeTypeParameters(typeParameters) {
+        if (ts.some(typeParameters)) {
+            var nodeArray = ts.createNodeArray();
+            for (var i = 0; i < typeParameters.length; ++i) {
+                var entry = typeParameters[i];
+                nodeArray.push(i === 0 && ts.isFunctionOrConstructorTypeNode(entry) && entry.typeParameters ?
+                    ts.createParenthesizedType(entry) :
+                    entry);
+            }
+            return nodeArray;
+        }
+    }
+    ts.parenthesizeTypeParameters = parenthesizeTypeParameters;
+    function getLeftmostExpression(node) {
+        while (true) {
+            switch (node.kind) {
+                case 193 /* PostfixUnaryExpression */:
+                    node = node.operand;
+                    continue;
+                case 194 /* BinaryExpression */:
+                    node = node.left;
+                    continue;
+                case 195 /* ConditionalExpression */:
+                    node = node.condition;
+                    continue;
+                case 181 /* CallExpression */:
+                case 180 /* ElementAccessExpression */:
+                case 179 /* PropertyAccessExpression */:
+                    node = node.expression;
+                    continue;
+                case 297 /* PartiallyEmittedExpression */:
+                    node = node.expression;
+                    continue;
             }
-            decreaseIndent();
-            if (node.parent.kind === 156 /* FunctionType */ ||
-                node.parent.kind === 157 /* ConstructorType */ ||
-                node.parent.parent.kind === 159 /* TypeLiteral */) {
-                emitTypeOfVariableDeclarationFromTypeLiteral(node);
+            return node;
+        }
+    }
+    function parenthesizeConciseBody(body) {
+        if (!ts.isBlock(body) && getLeftmostExpression(body).kind === 178 /* ObjectLiteralExpression */) {
+            return ts.setTextRange(ts.createParen(body), body);
+        }
+        return body;
+    }
+    ts.parenthesizeConciseBody = parenthesizeConciseBody;
+    var OuterExpressionKinds;
+    (function (OuterExpressionKinds) {
+        OuterExpressionKinds[OuterExpressionKinds["Parentheses"] = 1] = "Parentheses";
+        OuterExpressionKinds[OuterExpressionKinds["Assertions"] = 2] = "Assertions";
+        OuterExpressionKinds[OuterExpressionKinds["PartiallyEmittedExpressions"] = 4] = "PartiallyEmittedExpressions";
+        OuterExpressionKinds[OuterExpressionKinds["All"] = 7] = "All";
+    })(OuterExpressionKinds = ts.OuterExpressionKinds || (ts.OuterExpressionKinds = {}));
+    function isOuterExpression(node, kinds) {
+        if (kinds === void 0) { kinds = 7 /* All */; }
+        switch (node.kind) {
+            case 185 /* ParenthesizedExpression */:
+                return (kinds & 1 /* Parentheses */) !== 0;
+            case 184 /* TypeAssertionExpression */:
+            case 202 /* AsExpression */:
+            case 203 /* NonNullExpression */:
+                return (kinds & 2 /* Assertions */) !== 0;
+            case 297 /* PartiallyEmittedExpression */:
+                return (kinds & 4 /* PartiallyEmittedExpressions */) !== 0;
+        }
+        return false;
+    }
+    ts.isOuterExpression = isOuterExpression;
+    function skipOuterExpressions(node, kinds) {
+        if (kinds === void 0) { kinds = 7 /* All */; }
+        var previousNode;
+        do {
+            previousNode = node;
+            if (kinds & 1 /* Parentheses */) {
+                node = skipParentheses(node);
             }
-            else if (!ts.hasModifier(node.parent, 8 /* Private */)) {
-                writeTypeOfDeclaration(node, node.type, getParameterDeclarationTypeVisibilityError);
+            if (kinds & 2 /* Assertions */) {
+                node = skipAssertions(node);
             }
-            function getParameterDeclarationTypeVisibilityError(symbolAccessibilityResult) {
-                var diagnosticMessage = getParameterDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult);
-                return diagnosticMessage !== undefined ? {
-                    diagnosticMessage: diagnosticMessage,
-                    errorNode: node,
-                    typeName: node.name
-                } : undefined;
+            if (kinds & 4 /* PartiallyEmittedExpressions */) {
+                node = ts.skipPartiallyEmittedExpressions(node);
             }
-            function getParameterDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult) {
-                switch (node.parent.kind) {
-                    case 148 /* Constructor */:
-                        return symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
-                                ts.Diagnostics.Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
-                                ts.Diagnostics.Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Parameter_0_of_constructor_from_exported_class_has_or_is_using_private_name_1;
-                    case 152 /* ConstructSignature */:
-                        // Interfaces cannot have parameter types that cannot be named
-                        return symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1;
-                    case 151 /* CallSignature */:
-                        // Interfaces cannot have parameter types that cannot be named
-                        return symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1;
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                        if (ts.hasModifier(node.parent, 32 /* Static */)) {
-                            return symbolAccessibilityResult.errorModuleName ?
-                                symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
-                                    ts.Diagnostics.Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
-                                    ts.Diagnostics.Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
-                                ts.Diagnostics.Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1;
-                        }
-                        else if (node.parent.parent.kind === 221 /* ClassDeclaration */) {
-                            return symbolAccessibilityResult.errorModuleName ?
-                                symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
-                                    ts.Diagnostics.Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
-                                    ts.Diagnostics.Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
-                                ts.Diagnostics.Parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1;
-                        }
-                        else {
-                            // Interfaces cannot have parameter types that cannot be named
-                            return symbolAccessibilityResult.errorModuleName ?
-                                ts.Diagnostics.Parameter_0_of_method_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
-                                ts.Diagnostics.Parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1;
+        } while (previousNode !== node);
+        return node;
+    }
+    ts.skipOuterExpressions = skipOuterExpressions;
+    function skipParentheses(node) {
+        while (node.kind === 185 /* ParenthesizedExpression */) {
+            node = node.expression;
+        }
+        return node;
+    }
+    ts.skipParentheses = skipParentheses;
+    function skipAssertions(node) {
+        while (ts.isAssertionExpression(node) || node.kind === 203 /* NonNullExpression */) {
+            node = node.expression;
+        }
+        return node;
+    }
+    ts.skipAssertions = skipAssertions;
+    function updateOuterExpression(outerExpression, expression) {
+        switch (outerExpression.kind) {
+            case 185 /* ParenthesizedExpression */: return ts.updateParen(outerExpression, expression);
+            case 184 /* TypeAssertionExpression */: return ts.updateTypeAssertion(outerExpression, outerExpression.type, expression);
+            case 202 /* AsExpression */: return ts.updateAsExpression(outerExpression, expression, outerExpression.type);
+            case 203 /* NonNullExpression */: return ts.updateNonNullExpression(outerExpression, expression);
+            case 297 /* PartiallyEmittedExpression */: return ts.updatePartiallyEmittedExpression(outerExpression, expression);
+        }
+    }
+    function recreateOuterExpressions(outerExpression, innerExpression, kinds) {
+        if (kinds === void 0) { kinds = 7 /* All */; }
+        if (outerExpression && isOuterExpression(outerExpression, kinds)) {
+            return updateOuterExpression(outerExpression, recreateOuterExpressions(outerExpression.expression, innerExpression));
+        }
+        return innerExpression;
+    }
+    ts.recreateOuterExpressions = recreateOuterExpressions;
+    function startOnNewLine(node) {
+        node.startsOnNewLine = true;
+        return node;
+    }
+    ts.startOnNewLine = startOnNewLine;
+    function getExternalHelpersModuleName(node) {
+        var parseNode = ts.getOriginalNode(node, ts.isSourceFile);
+        var emitNode = parseNode && parseNode.emitNode;
+        return emitNode && emitNode.externalHelpersModuleName;
+    }
+    ts.getExternalHelpersModuleName = getExternalHelpersModuleName;
+    function getOrCreateExternalHelpersModuleNameIfNeeded(node, compilerOptions, hasExportStarsToExportValues) {
+        if (compilerOptions.importHelpers && ts.isEffectiveExternalModule(node, compilerOptions)) {
+            var externalHelpersModuleName = getExternalHelpersModuleName(node);
+            if (externalHelpersModuleName) {
+                return externalHelpersModuleName;
+            }
+            var moduleKind = ts.getEmitModuleKind(compilerOptions);
+            var create = hasExportStarsToExportValues
+                && moduleKind !== ts.ModuleKind.System
+                && moduleKind !== ts.ModuleKind.ES2015;
+            if (!create) {
+                var helpers = ts.getEmitHelpers(node);
+                if (helpers) {
+                    for (var _i = 0, helpers_2 = helpers; _i < helpers_2.length; _i++) {
+                        var helper = helpers_2[_i];
+                        if (!helper.scoped) {
+                            create = true;
+                            break;
                         }
-                    case 220 /* FunctionDeclaration */:
-                        return symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
-                                ts.Diagnostics.Parameter_0_of_exported_function_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
-                                ts.Diagnostics.Parameter_0_of_exported_function_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Parameter_0_of_exported_function_has_or_is_using_private_name_1;
-                    default:
-                        ts.Debug.fail("This is unknown parent for parameter: " + node.parent.kind);
+                    }
                 }
             }
-            function emitBindingPattern(bindingPattern) {
-                // We have to explicitly emit square bracket and bracket because these tokens are not store inside the node.
-                if (bindingPattern.kind === 167 /* ObjectBindingPattern */) {
-                    write("{");
-                    emitCommaList(bindingPattern.elements, emitBindingElement);
-                    write("}");
+            if (create) {
+                var parseNode = ts.getOriginalNode(node, ts.isSourceFile);
+                var emitNode = ts.getOrCreateEmitNode(parseNode);
+                return emitNode.externalHelpersModuleName || (emitNode.externalHelpersModuleName = ts.createUniqueName(ts.externalHelpersModuleNameText));
+            }
+        }
+    }
+    ts.getOrCreateExternalHelpersModuleNameIfNeeded = getOrCreateExternalHelpersModuleNameIfNeeded;
+    /**
+     * Get the name of that target module from an import or export declaration
+     */
+    function getLocalNameForExternalImport(node, sourceFile) {
+        var namespaceDeclaration = ts.getNamespaceDeclarationNode(node);
+        if (namespaceDeclaration && !ts.isDefaultImport(node)) {
+            var name_41 = namespaceDeclaration.name;
+            return ts.isGeneratedIdentifier(name_41) ? name_41 : ts.createIdentifier(ts.getSourceTextOfNodeFromSourceFile(sourceFile, namespaceDeclaration.name));
+        }
+        if (node.kind === 238 /* ImportDeclaration */ && node.importClause) {
+            return ts.getGeneratedNameForNode(node);
+        }
+        if (node.kind === 244 /* ExportDeclaration */ && node.moduleSpecifier) {
+            return ts.getGeneratedNameForNode(node);
+        }
+        return undefined;
+    }
+    ts.getLocalNameForExternalImport = getLocalNameForExternalImport;
+    /**
+     * Get the name of a target module from an import/export declaration as should be written in the emitted output.
+     * The emitted output name can be different from the input if:
+     *  1. The module has a /// <amd-module name="<new name>" />
+     *  2. --out or --outFile is used, making the name relative to the rootDir
+     *  3- The containing SourceFile has an entry in renamedDependencies for the import as requested by some module loaders (e.g. System).
+     * Otherwise, a new StringLiteral node representing the module name will be returned.
+     */
+    function getExternalModuleNameLiteral(importNode, sourceFile, host, resolver, compilerOptions) {
+        var moduleName = ts.getExternalModuleName(importNode);
+        if (moduleName.kind === 9 /* StringLiteral */) {
+            return tryGetModuleNameFromDeclaration(importNode, host, resolver, compilerOptions)
+                || tryRenameExternalModule(moduleName, sourceFile)
+                || ts.getSynthesizedClone(moduleName);
+        }
+        return undefined;
+    }
+    ts.getExternalModuleNameLiteral = getExternalModuleNameLiteral;
+    /**
+     * Some bundlers (SystemJS builder) sometimes want to rename dependencies.
+     * Here we check if alternative name was provided for a given moduleName and return it if possible.
+     */
+    function tryRenameExternalModule(moduleName, sourceFile) {
+        var rename = sourceFile.renamedDependencies && sourceFile.renamedDependencies.get(moduleName.text);
+        return rename && ts.createLiteral(rename);
+    }
+    /**
+     * Get the name of a module as should be written in the emitted output.
+     * The emitted output name can be different from the input if:
+     *  1. The module has a /// <amd-module name="<new name>" />
+     *  2. --out or --outFile is used, making the name relative to the rootDir
+     * Otherwise, a new StringLiteral node representing the module name will be returned.
+     */
+    function tryGetModuleNameFromFile(file, host, options) {
+        if (!file) {
+            return undefined;
+        }
+        if (file.moduleName) {
+            return ts.createLiteral(file.moduleName);
+        }
+        if (!file.isDeclarationFile && (options.out || options.outFile)) {
+            return ts.createLiteral(ts.getExternalModuleNameFromPath(host, file.fileName));
+        }
+        return undefined;
+    }
+    ts.tryGetModuleNameFromFile = tryGetModuleNameFromFile;
+    function tryGetModuleNameFromDeclaration(declaration, host, resolver, compilerOptions) {
+        return tryGetModuleNameFromFile(resolver.getExternalModuleFileFromDeclaration(declaration), host, compilerOptions);
+    }
+    /**
+     * Gets the initializer of an BindingOrAssignmentElement.
+     */
+    function getInitializerOfBindingOrAssignmentElement(bindingElement) {
+        if (ts.isDeclarationBindingElement(bindingElement)) {
+            // `1` in `let { a = 1 } = ...`
+            // `1` in `let { a: b = 1 } = ...`
+            // `1` in `let { a: {b} = 1 } = ...`
+            // `1` in `let { a: [b] = 1 } = ...`
+            // `1` in `let [a = 1] = ...`
+            // `1` in `let [{a} = 1] = ...`
+            // `1` in `let [[a] = 1] = ...`
+            return bindingElement.initializer;
+        }
+        if (ts.isPropertyAssignment(bindingElement)) {
+            // `1` in `({ a: b = 1 } = ...)`
+            // `1` in `({ a: {b} = 1 } = ...)`
+            // `1` in `({ a: [b] = 1 } = ...)`
+            return ts.isAssignmentExpression(bindingElement.initializer, /*excludeCompoundAssignment*/ true)
+                ? bindingElement.initializer.right
+                : undefined;
+        }
+        if (ts.isShorthandPropertyAssignment(bindingElement)) {
+            // `1` in `({ a = 1 } = ...)`
+            return bindingElement.objectAssignmentInitializer;
+        }
+        if (ts.isAssignmentExpression(bindingElement, /*excludeCompoundAssignment*/ true)) {
+            // `1` in `[a = 1] = ...`
+            // `1` in `[{a} = 1] = ...`
+            // `1` in `[[a] = 1] = ...`
+            return bindingElement.right;
+        }
+        if (ts.isSpreadElement(bindingElement)) {
+            // Recovery consistent with existing emit.
+            return getInitializerOfBindingOrAssignmentElement(bindingElement.expression);
+        }
+    }
+    ts.getInitializerOfBindingOrAssignmentElement = getInitializerOfBindingOrAssignmentElement;
+    /**
+     * Gets the name of an BindingOrAssignmentElement.
+     */
+    function getTargetOfBindingOrAssignmentElement(bindingElement) {
+        if (ts.isDeclarationBindingElement(bindingElement)) {
+            // `a` in `let { a } = ...`
+            // `a` in `let { a = 1 } = ...`
+            // `b` in `let { a: b } = ...`
+            // `b` in `let { a: b = 1 } = ...`
+            // `a` in `let { ...a } = ...`
+            // `{b}` in `let { a: {b} } = ...`
+            // `{b}` in `let { a: {b} = 1 } = ...`
+            // `[b]` in `let { a: [b] } = ...`
+            // `[b]` in `let { a: [b] = 1 } = ...`
+            // `a` in `let [a] = ...`
+            // `a` in `let [a = 1] = ...`
+            // `a` in `let [...a] = ...`
+            // `{a}` in `let [{a}] = ...`
+            // `{a}` in `let [{a} = 1] = ...`
+            // `[a]` in `let [[a]] = ...`
+            // `[a]` in `let [[a] = 1] = ...`
+            return bindingElement.name;
+        }
+        if (ts.isObjectLiteralElementLike(bindingElement)) {
+            switch (bindingElement.kind) {
+                case 261 /* PropertyAssignment */:
+                    // `b` in `({ a: b } = ...)`
+                    // `b` in `({ a: b = 1 } = ...)`
+                    // `{b}` in `({ a: {b} } = ...)`
+                    // `{b}` in `({ a: {b} = 1 } = ...)`
+                    // `[b]` in `({ a: [b] } = ...)`
+                    // `[b]` in `({ a: [b] = 1 } = ...)`
+                    // `b.c` in `({ a: b.c } = ...)`
+                    // `b.c` in `({ a: b.c = 1 } = ...)`
+                    // `b[0]` in `({ a: b[0] } = ...)`
+                    // `b[0]` in `({ a: b[0] = 1 } = ...)`
+                    return getTargetOfBindingOrAssignmentElement(bindingElement.initializer);
+                case 262 /* ShorthandPropertyAssignment */:
+                    // `a` in `({ a } = ...)`
+                    // `a` in `({ a = 1 } = ...)`
+                    return bindingElement.name;
+                case 263 /* SpreadAssignment */:
+                    // `a` in `({ ...a } = ...)`
+                    return getTargetOfBindingOrAssignmentElement(bindingElement.expression);
+            }
+            // no target
+            return undefined;
+        }
+        if (ts.isAssignmentExpression(bindingElement, /*excludeCompoundAssignment*/ true)) {
+            // `a` in `[a = 1] = ...`
+            // `{a}` in `[{a} = 1] = ...`
+            // `[a]` in `[[a] = 1] = ...`
+            // `a.b` in `[a.b = 1] = ...`
+            // `a[0]` in `[a[0] = 1] = ...`
+            return getTargetOfBindingOrAssignmentElement(bindingElement.left);
+        }
+        if (ts.isSpreadElement(bindingElement)) {
+            // `a` in `[...a] = ...`
+            return getTargetOfBindingOrAssignmentElement(bindingElement.expression);
+        }
+        // `a` in `[a] = ...`
+        // `{a}` in `[{a}] = ...`
+        // `[a]` in `[[a]] = ...`
+        // `a.b` in `[a.b] = ...`
+        // `a[0]` in `[a[0]] = ...`
+        return bindingElement;
+    }
+    ts.getTargetOfBindingOrAssignmentElement = getTargetOfBindingOrAssignmentElement;
+    /**
+     * Determines whether an BindingOrAssignmentElement is a rest element.
+     */
+    function getRestIndicatorOfBindingOrAssignmentElement(bindingElement) {
+        switch (bindingElement.kind) {
+            case 146 /* Parameter */:
+            case 176 /* BindingElement */:
+                // `...` in `let [...a] = ...`
+                return bindingElement.dotDotDotToken;
+            case 198 /* SpreadElement */:
+            case 263 /* SpreadAssignment */:
+                // `...` in `[...a] = ...`
+                return bindingElement;
+        }
+        return undefined;
+    }
+    ts.getRestIndicatorOfBindingOrAssignmentElement = getRestIndicatorOfBindingOrAssignmentElement;
+    /**
+     * Gets the property name of a BindingOrAssignmentElement
+     */
+    function getPropertyNameOfBindingOrAssignmentElement(bindingElement) {
+        switch (bindingElement.kind) {
+            case 176 /* BindingElement */:
+                // `a` in `let { a: b } = ...`
+                // `[a]` in `let { [a]: b } = ...`
+                // `"a"` in `let { "a": b } = ...`
+                // `1` in `let { 1: b } = ...`
+                if (bindingElement.propertyName) {
+                    var propertyName = bindingElement.propertyName;
+                    return ts.isComputedPropertyName(propertyName) && ts.isStringOrNumericLiteral(propertyName.expression)
+                        ? propertyName.expression
+                        : propertyName;
                 }
-                else if (bindingPattern.kind === 168 /* ArrayBindingPattern */) {
-                    write("[");
-                    var elements = bindingPattern.elements;
-                    emitCommaList(elements, emitBindingElement);
-                    if (elements && elements.hasTrailingComma) {
-                        write(", ");
-                    }
-                    write("]");
+                break;
+            case 261 /* PropertyAssignment */:
+                // `a` in `({ a: b } = ...)`
+                // `[a]` in `({ [a]: b } = ...)`
+                // `"a"` in `({ "a": b } = ...)`
+                // `1` in `({ 1: b } = ...)`
+                if (bindingElement.name) {
+                    var propertyName = bindingElement.name;
+                    return ts.isComputedPropertyName(propertyName) && ts.isStringOrNumericLiteral(propertyName.expression)
+                        ? propertyName.expression
+                        : propertyName;
                 }
-            }
-            function emitBindingElement(bindingElement) {
-                if (bindingElement.kind === 193 /* OmittedExpression */) {
-                    // If bindingElement is an omittedExpression (i.e. containing elision),
-                    // we will emit blank space (although this may differ from users' original code,
-                    // it allows emitSeparatedList to write separator appropriately)
-                    // Example:
-                    //      original: function foo([, x, ,]) {}
-                    //      emit    : function foo([ , x,  , ]) {}
-                    write(" ");
+                break;
+            case 263 /* SpreadAssignment */:
+                // `a` in `({ ...a } = ...)`
+                return bindingElement.name;
+        }
+        var target = getTargetOfBindingOrAssignmentElement(bindingElement);
+        if (target && ts.isPropertyName(target)) {
+            return ts.isComputedPropertyName(target) && ts.isStringOrNumericLiteral(target.expression)
+                ? target.expression
+                : target;
+        }
+        ts.Debug.fail("Invalid property name for binding element.");
+    }
+    ts.getPropertyNameOfBindingOrAssignmentElement = getPropertyNameOfBindingOrAssignmentElement;
+    /**
+     * Gets the elements of a BindingOrAssignmentPattern
+     */
+    function getElementsOfBindingOrAssignmentPattern(name) {
+        switch (name.kind) {
+            case 174 /* ObjectBindingPattern */:
+            case 175 /* ArrayBindingPattern */:
+            case 177 /* ArrayLiteralExpression */:
+                // `a` in `{a}`
+                // `a` in `[a]`
+                return name.elements;
+            case 178 /* ObjectLiteralExpression */:
+                // `a` in `{a}`
+                return name.properties;
+        }
+    }
+    ts.getElementsOfBindingOrAssignmentPattern = getElementsOfBindingOrAssignmentPattern;
+    function convertToArrayAssignmentElement(element) {
+        if (ts.isBindingElement(element)) {
+            if (element.dotDotDotToken) {
+                ts.Debug.assertNode(element.name, ts.isIdentifier);
+                return ts.setOriginalNode(ts.setTextRange(ts.createSpread(element.name), element), element);
+            }
+            var expression = convertToAssignmentElementTarget(element.name);
+            return element.initializer
+                ? ts.setOriginalNode(ts.setTextRange(ts.createAssignment(expression, element.initializer), element), element)
+                : expression;
+        }
+        ts.Debug.assertNode(element, ts.isExpression);
+        return element;
+    }
+    ts.convertToArrayAssignmentElement = convertToArrayAssignmentElement;
+    function convertToObjectAssignmentElement(element) {
+        if (ts.isBindingElement(element)) {
+            if (element.dotDotDotToken) {
+                ts.Debug.assertNode(element.name, ts.isIdentifier);
+                return ts.setOriginalNode(ts.setTextRange(ts.createSpreadAssignment(element.name), element), element);
+            }
+            if (element.propertyName) {
+                var expression = convertToAssignmentElementTarget(element.name);
+                return ts.setOriginalNode(ts.setTextRange(ts.createPropertyAssignment(element.propertyName, element.initializer ? ts.createAssignment(expression, element.initializer) : expression), element), element);
+            }
+            ts.Debug.assertNode(element.name, ts.isIdentifier);
+            return ts.setOriginalNode(ts.setTextRange(ts.createShorthandPropertyAssignment(element.name, element.initializer), element), element);
+        }
+        ts.Debug.assertNode(element, ts.isObjectLiteralElementLike);
+        return element;
+    }
+    ts.convertToObjectAssignmentElement = convertToObjectAssignmentElement;
+    function convertToAssignmentPattern(node) {
+        switch (node.kind) {
+            case 175 /* ArrayBindingPattern */:
+            case 177 /* ArrayLiteralExpression */:
+                return convertToArrayAssignmentPattern(node);
+            case 174 /* ObjectBindingPattern */:
+            case 178 /* ObjectLiteralExpression */:
+                return convertToObjectAssignmentPattern(node);
+        }
+    }
+    ts.convertToAssignmentPattern = convertToAssignmentPattern;
+    function convertToObjectAssignmentPattern(node) {
+        if (ts.isObjectBindingPattern(node)) {
+            return ts.setOriginalNode(ts.setTextRange(ts.createObjectLiteral(ts.map(node.elements, convertToObjectAssignmentElement)), node), node);
+        }
+        ts.Debug.assertNode(node, ts.isObjectLiteralExpression);
+        return node;
+    }
+    ts.convertToObjectAssignmentPattern = convertToObjectAssignmentPattern;
+    function convertToArrayAssignmentPattern(node) {
+        if (ts.isArrayBindingPattern(node)) {
+            return ts.setOriginalNode(ts.setTextRange(ts.createArrayLiteral(ts.map(node.elements, convertToArrayAssignmentElement)), node), node);
+        }
+        ts.Debug.assertNode(node, ts.isArrayLiteralExpression);
+        return node;
+    }
+    ts.convertToArrayAssignmentPattern = convertToArrayAssignmentPattern;
+    function convertToAssignmentElementTarget(node) {
+        if (ts.isBindingPattern(node)) {
+            return convertToAssignmentPattern(node);
+        }
+        ts.Debug.assertNode(node, ts.isExpression);
+        return node;
+    }
+    ts.convertToAssignmentElementTarget = convertToAssignmentElementTarget;
+})(ts || (ts = {}));
+/// <reference path="checker.ts" />
+/// <reference path="factory.ts" />
+/// <reference path="utilities.ts" />
+var ts;
+(function (ts) {
+    function visitNode(node, visitor, test, lift) {
+        if (node === undefined || visitor === undefined) {
+            return node;
+        }
+        ts.aggregateTransformFlags(node);
+        var visited = visitor(node);
+        if (visited === node) {
+            return node;
+        }
+        var visitedNode;
+        if (visited === undefined) {
+            return undefined;
+        }
+        else if (ts.isArray(visited)) {
+            visitedNode = (lift || extractSingleNode)(visited);
+        }
+        else {
+            visitedNode = visited;
+        }
+        ts.Debug.assertNode(visitedNode, test);
+        ts.aggregateTransformFlags(visitedNode);
+        return visitedNode;
+    }
+    ts.visitNode = visitNode;
+    /**
+     * Visits a NodeArray using the supplied visitor, possibly returning a new NodeArray in its place.
+     *
+     * @param nodes The NodeArray to visit.
+     * @param visitor The callback used to visit a Node.
+     * @param test A node test to execute for each node.
+     * @param start An optional value indicating the starting offset at which to start visiting.
+     * @param count An optional value indicating the maximum number of nodes to visit.
+     */
+    function visitNodes(nodes, visitor, test, start, count) {
+        if (nodes === undefined || visitor === undefined) {
+            return nodes;
+        }
+        var updated;
+        // Ensure start and count have valid values
+        var length = nodes.length;
+        if (start === undefined || start < 0) {
+            start = 0;
+        }
+        if (count === undefined || count > length - start) {
+            count = length - start;
+        }
+        if (start > 0 || count < length) {
+            // If we are not visiting all of the original nodes, we must always create a new array.
+            // Since this is a fragment of a node array, we do not copy over the previous location
+            // and will only copy over `hasTrailingComma` if we are including the last element.
+            updated = ts.createNodeArray([], /*hasTrailingComma*/ nodes.hasTrailingComma && start + count === length);
+        }
+        // Visit each original node.
+        for (var i = 0; i < count; i++) {
+            var node = nodes[i + start];
+            ts.aggregateTransformFlags(node);
+            var visited = node !== undefined ? visitor(node) : undefined;
+            if (updated !== undefined || visited === undefined || visited !== node) {
+                if (updated === undefined) {
+                    // Ensure we have a copy of `nodes`, up to the current index.
+                    updated = ts.createNodeArray(nodes.slice(0, i), nodes.hasTrailingComma);
+                    ts.setTextRange(updated, nodes);
                 }
-                else if (bindingElement.kind === 169 /* BindingElement */) {
-                    if (bindingElement.propertyName) {
-                        // bindingElement has propertyName property in the following case:
-                        //      { y: [a,b,c] ...} -> bindingPattern will have a property called propertyName for "y"
-                        // We have to explicitly emit the propertyName before descending into its binding elements.
-                        // Example:
-                        //      original: function foo({y: [a,b,c]}) {}
-                        //      emit    : declare function foo({y: [a, b, c]}: { y: [any, any, any] }) void;
-                        writeTextOfNode(currentText, bindingElement.propertyName);
-                        write(": ");
-                    }
-                    if (bindingElement.name) {
-                        if (ts.isBindingPattern(bindingElement.name)) {
-                            // If it is a nested binding pattern, we will recursively descend into each element and emit each one separately.
-                            // In the case of rest element, we will omit rest element.
-                            // Example:
-                            //      original: function foo([a, [[b]], c] = [1,[["string"]], 3]) {}
-                            //      emit    : declare function foo([a, [[b]], c]: [number, [[string]], number]): void;
-                            //      original with rest: function foo([a, ...c]) {}
-                            //      emit              : declare function foo([a, ...c]): void;
-                            emitBindingPattern(bindingElement.name);
-                        }
-                        else {
-                            ts.Debug.assert(bindingElement.name.kind === 69 /* Identifier */);
-                            // If the node is just an identifier, we will simply emit the text associated with the node's name
-                            // Example:
-                            //      original: function foo({y = 10, x}) {}
-                            //      emit    : declare function foo({y, x}: {number, any}): void;
-                            if (bindingElement.dotDotDotToken) {
-                                write("...");
-                            }
-                            writeTextOfNode(currentText, bindingElement.name);
+                if (visited) {
+                    if (ts.isArray(visited)) {
+                        for (var _i = 0, visited_1 = visited; _i < visited_1.length; _i++) {
+                            var visitedNode = visited_1[_i];
+                            ts.Debug.assertNode(visitedNode, test);
+                            ts.aggregateTransformFlags(visitedNode);
+                            updated.push(visitedNode);
                         }
                     }
+                    else {
+                        ts.Debug.assertNode(visited, test);
+                        ts.aggregateTransformFlags(visited);
+                        updated.push(visited);
+                    }
                 }
             }
         }
-        function emitNode(node) {
-            switch (node.kind) {
-                case 220 /* FunctionDeclaration */:
-                case 225 /* ModuleDeclaration */:
-                case 229 /* ImportEqualsDeclaration */:
-                case 222 /* InterfaceDeclaration */:
-                case 221 /* ClassDeclaration */:
-                case 223 /* TypeAliasDeclaration */:
-                case 224 /* EnumDeclaration */:
-                    return emitModuleElement(node, isModuleElementVisible(node));
-                case 200 /* VariableStatement */:
-                    return emitModuleElement(node, isVariableStatementVisible(node));
-                case 230 /* ImportDeclaration */:
-                    // Import declaration without import clause is visible, otherwise it is not visible
-                    return emitModuleElement(node, /*isModuleElementVisible*/ !node.importClause);
-                case 236 /* ExportDeclaration */:
-                    return emitExportDeclaration(node);
-                case 148 /* Constructor */:
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                    return writeFunctionDeclaration(node);
-                case 152 /* ConstructSignature */:
-                case 151 /* CallSignature */:
-                case 153 /* IndexSignature */:
-                    return emitSignatureDeclarationWithJsDocComments(node);
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                    return emitAccessorDeclaration(node);
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
-                    return emitPropertyDeclaration(node);
-                case 255 /* EnumMember */:
-                    return emitEnumMemberDeclaration(node);
-                case 235 /* ExportAssignment */:
-                    return emitExportAssignment(node);
-                case 256 /* SourceFile */:
-                    return emitSourceFile(node);
-            }
+        return updated || nodes;
+    }
+    ts.visitNodes = visitNodes;
+    /**
+     * Starts a new lexical environment and visits a statement list, ending the lexical environment
+     * and merging hoisted declarations upon completion.
+     */
+    function visitLexicalEnvironment(statements, visitor, context, start, ensureUseStrict) {
+        context.startLexicalEnvironment();
+        statements = visitNodes(statements, visitor, ts.isStatement, start);
+        if (ensureUseStrict && !ts.startsWithUseStrict(statements)) {
+            statements = ts.setTextRange(ts.createNodeArray([ts.createStatement(ts.createLiteral("use strict"))].concat(statements)), statements);
         }
-        /**
-         * Adds the reference to referenced file, returns true if global file reference was emitted
-         * @param referencedFile
-         * @param addBundledFileReference Determines if global file reference corresponding to bundled file should be emitted or not
-         */
-        function writeReferencePath(referencedFile, addBundledFileReference, emitOnlyDtsFiles) {
-            var declFileName;
-            var addedBundledEmitReference = false;
-            if (ts.isDeclarationFile(referencedFile)) {
-                // Declaration file, use declaration file name
-                declFileName = referencedFile.fileName;
-            }
-            else {
-                // Get the declaration file path
-                ts.forEachExpectedEmitFile(host, getDeclFileName, referencedFile, emitOnlyDtsFiles);
-            }
-            if (declFileName) {
-                declFileName = ts.getRelativePathToDirectoryOrUrl(ts.getDirectoryPath(ts.normalizeSlashes(declarationFilePath)), declFileName, host.getCurrentDirectory(), host.getCanonicalFileName, 
-                /*isAbsolutePathAnUrl*/ false);
-                referencesOutput += "/// <reference path=\"" + declFileName + "\" />" + newLine;
-            }
-            return addedBundledEmitReference;
-            function getDeclFileName(emitFileNames, sourceFiles, isBundledEmit) {
-                // Dont add reference path to this file if it is a bundled emit and caller asked not emit bundled file path
-                if (isBundledEmit && !addBundledFileReference) {
-                    return;
-                }
-                ts.Debug.assert(!!emitFileNames.declarationFilePath || ts.isSourceFileJavaScript(referencedFile), "Declaration file is not present only for javascript files");
-                declFileName = emitFileNames.declarationFilePath || emitFileNames.jsFilePath;
-                addedBundledEmitReference = isBundledEmit;
-            }
+        var declarations = context.endLexicalEnvironment();
+        return ts.setTextRange(ts.createNodeArray(ts.concatenate(statements, declarations)), statements);
+    }
+    ts.visitLexicalEnvironment = visitLexicalEnvironment;
+    /**
+     * Starts a new lexical environment and visits a parameter list, suspending the lexical
+     * environment upon completion.
+     */
+    function visitParameterList(nodes, visitor, context, nodesVisitor) {
+        if (nodesVisitor === void 0) { nodesVisitor = visitNodes; }
+        context.startLexicalEnvironment();
+        var updated = nodesVisitor(nodes, visitor, ts.isParameterDeclaration);
+        context.suspendLexicalEnvironment();
+        return updated;
+    }
+    ts.visitParameterList = visitParameterList;
+    function visitFunctionBody(node, visitor, context) {
+        context.resumeLexicalEnvironment();
+        var updated = visitNode(node, visitor, ts.isConciseBody);
+        var declarations = context.endLexicalEnvironment();
+        if (ts.some(declarations)) {
+            var block = ts.convertToFunctionBody(updated);
+            var statements = ts.mergeLexicalEnvironment(block.statements, declarations);
+            return ts.updateBlock(block, statements);
         }
+        return updated;
     }
-    /* @internal */
-    function writeDeclarationFile(declarationFilePath, sourceFiles, isBundledEmit, host, resolver, emitterDiagnostics, emitOnlyDtsFiles) {
-        var emitDeclarationResult = emitDeclarations(host, resolver, emitterDiagnostics, declarationFilePath, sourceFiles, isBundledEmit, emitOnlyDtsFiles);
-        var emitSkipped = emitDeclarationResult.reportedDeclarationError || host.isEmitBlocked(declarationFilePath) || host.getCompilerOptions().noEmit;
-        if (!emitSkipped) {
-            var declarationOutput = emitDeclarationResult.referencesOutput
-                + getDeclarationOutput(emitDeclarationResult.synchronousDeclarationOutput, emitDeclarationResult.moduleElementDeclarationEmitInfo);
-            ts.writeFile(host, emitterDiagnostics, declarationFilePath, declarationOutput, host.getCompilerOptions().emitBOM, sourceFiles);
+    ts.visitFunctionBody = visitFunctionBody;
+    function visitEachChild(node, visitor, context, nodesVisitor, tokenVisitor) {
+        if (nodesVisitor === void 0) { nodesVisitor = visitNodes; }
+        if (node === undefined) {
+            return undefined;
         }
-        return emitSkipped;
-        function getDeclarationOutput(synchronousDeclarationOutput, moduleElementDeclarationEmitInfo) {
-            var appliedSyncOutputPos = 0;
-            var declarationOutput = "";
-            // apply asynchronous additions to the synchronous output
-            ts.forEach(moduleElementDeclarationEmitInfo, function (aliasEmitInfo) {
-                if (aliasEmitInfo.asynchronousOutput) {
-                    declarationOutput += synchronousDeclarationOutput.substring(appliedSyncOutputPos, aliasEmitInfo.outputPos);
-                    declarationOutput += getDeclarationOutput(aliasEmitInfo.asynchronousOutput, aliasEmitInfo.subModuleElementDeclarationEmitInfo);
-                    appliedSyncOutputPos = aliasEmitInfo.outputPos;
-                }
-            });
-            declarationOutput += synchronousDeclarationOutput.substring(appliedSyncOutputPos);
-            return declarationOutput;
+        var kind = node.kind;
+        // No need to visit nodes with no children.
+        if ((kind > 0 /* FirstToken */ && kind <= 142 /* LastToken */) || kind === 169 /* ThisType */) {
+            return node;
+        }
+        switch (kind) {
+            // Names
+            case 71 /* Identifier */:
+                return ts.updateIdentifier(node, nodesVisitor(node.typeArguments, visitor, ts.isTypeNode));
+            case 143 /* QualifiedName */:
+                return ts.updateQualifiedName(node, visitNode(node.left, visitor, ts.isEntityName), visitNode(node.right, visitor, ts.isIdentifier));
+            case 144 /* ComputedPropertyName */:
+                return ts.updateComputedPropertyName(node, visitNode(node.expression, visitor, ts.isExpression));
+            // Signature elements
+            case 145 /* TypeParameter */:
+                return ts.updateTypeParameterDeclaration(node, visitNode(node.name, visitor, ts.isIdentifier), visitNode(node.constraint, visitor, ts.isTypeNode), visitNode(node.default, visitor, ts.isTypeNode));
+            case 146 /* Parameter */:
+                return ts.updateParameter(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.dotDotDotToken, tokenVisitor, ts.isToken), visitNode(node.name, visitor, ts.isBindingName), visitNode(node.questionToken, tokenVisitor, ts.isToken), visitNode(node.type, visitor, ts.isTypeNode), visitNode(node.initializer, visitor, ts.isExpression));
+            case 147 /* Decorator */:
+                return ts.updateDecorator(node, visitNode(node.expression, visitor, ts.isExpression));
+            // Type elements
+            case 148 /* PropertySignature */:
+                return ts.updatePropertySignature(node, nodesVisitor(node.modifiers, visitor, ts.isToken), visitNode(node.name, visitor, ts.isPropertyName), visitNode(node.questionToken, tokenVisitor, ts.isToken), visitNode(node.type, visitor, ts.isTypeNode), visitNode(node.initializer, visitor, ts.isExpression));
+            case 149 /* PropertyDeclaration */:
+                return ts.updateProperty(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isPropertyName), visitNode(node.type, visitor, ts.isTypeNode), visitNode(node.initializer, visitor, ts.isExpression));
+            case 150 /* MethodSignature */:
+                return ts.updateMethodSignature(node, nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), nodesVisitor(node.parameters, visitor, ts.isParameterDeclaration), visitNode(node.type, visitor, ts.isTypeNode), visitNode(node.name, visitor, ts.isPropertyName), visitNode(node.questionToken, tokenVisitor, ts.isToken));
+            case 151 /* MethodDeclaration */:
+                return ts.updateMethod(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.asteriskToken, tokenVisitor, ts.isToken), visitNode(node.name, visitor, ts.isPropertyName), visitNode(node.questionToken, tokenVisitor, ts.isToken), nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), visitParameterList(node.parameters, visitor, context, nodesVisitor), visitNode(node.type, visitor, ts.isTypeNode), visitFunctionBody(node.body, visitor, context));
+            case 152 /* Constructor */:
+                return ts.updateConstructor(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitParameterList(node.parameters, visitor, context, nodesVisitor), visitFunctionBody(node.body, visitor, context));
+            case 153 /* GetAccessor */:
+                return ts.updateGetAccessor(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isPropertyName), visitParameterList(node.parameters, visitor, context, nodesVisitor), visitNode(node.type, visitor, ts.isTypeNode), visitFunctionBody(node.body, visitor, context));
+            case 154 /* SetAccessor */:
+                return ts.updateSetAccessor(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isPropertyName), visitParameterList(node.parameters, visitor, context, nodesVisitor), visitFunctionBody(node.body, visitor, context));
+            case 155 /* CallSignature */:
+                return ts.updateCallSignature(node, nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), nodesVisitor(node.parameters, visitor, ts.isParameterDeclaration), visitNode(node.type, visitor, ts.isTypeNode));
+            case 156 /* ConstructSignature */:
+                return ts.updateConstructSignature(node, nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), nodesVisitor(node.parameters, visitor, ts.isParameterDeclaration), visitNode(node.type, visitor, ts.isTypeNode));
+            case 157 /* IndexSignature */:
+                return ts.updateIndexSignature(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), nodesVisitor(node.parameters, visitor, ts.isParameterDeclaration), visitNode(node.type, visitor, ts.isTypeNode));
+            // Types
+            case 158 /* TypePredicate */:
+                return ts.updateTypePredicateNode(node, visitNode(node.parameterName, visitor), visitNode(node.type, visitor, ts.isTypeNode));
+            case 159 /* TypeReference */:
+                return ts.updateTypeReferenceNode(node, visitNode(node.typeName, visitor, ts.isEntityName), nodesVisitor(node.typeArguments, visitor, ts.isTypeNode));
+            case 160 /* FunctionType */:
+                return ts.updateFunctionTypeNode(node, nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), nodesVisitor(node.parameters, visitor, ts.isParameterDeclaration), visitNode(node.type, visitor, ts.isTypeNode));
+            case 161 /* ConstructorType */:
+                return ts.updateConstructorTypeNode(node, nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), nodesVisitor(node.parameters, visitor, ts.isParameterDeclaration), visitNode(node.type, visitor, ts.isTypeNode));
+            case 162 /* TypeQuery */:
+                return ts.updateTypeQueryNode(node, visitNode(node.exprName, visitor, ts.isEntityName));
+            case 163 /* TypeLiteral */:
+                return ts.updateTypeLiteralNode(node, nodesVisitor(node.members, visitor, ts.isTypeElement));
+            case 164 /* ArrayType */:
+                return ts.updateArrayTypeNode(node, visitNode(node.elementType, visitor, ts.isTypeNode));
+            case 165 /* TupleType */:
+                return ts.updateTypleTypeNode(node, nodesVisitor(node.elementTypes, visitor, ts.isTypeNode));
+            case 166 /* UnionType */:
+                return ts.updateUnionTypeNode(node, nodesVisitor(node.types, visitor, ts.isTypeNode));
+            case 167 /* IntersectionType */:
+                return ts.updateIntersectionTypeNode(node, nodesVisitor(node.types, visitor, ts.isTypeNode));
+            case 168 /* ParenthesizedType */:
+                return ts.updateParenthesizedType(node, visitNode(node.type, visitor, ts.isTypeNode));
+            case 170 /* TypeOperator */:
+                return ts.updateTypeOperatorNode(node, visitNode(node.type, visitor, ts.isTypeNode));
+            case 171 /* IndexedAccessType */:
+                return ts.updateIndexedAccessTypeNode(node, visitNode(node.objectType, visitor, ts.isTypeNode), visitNode(node.indexType, visitor, ts.isTypeNode));
+            case 172 /* MappedType */:
+                return ts.updateMappedTypeNode(node, visitNode(node.readonlyToken, tokenVisitor, ts.isToken), visitNode(node.typeParameter, visitor, ts.isTypeParameterDeclaration), visitNode(node.questionToken, tokenVisitor, ts.isToken), visitNode(node.type, visitor, ts.isTypeNode));
+            case 173 /* LiteralType */:
+                return ts.updateLiteralTypeNode(node, visitNode(node.literal, visitor, ts.isExpression));
+            // Binding patterns
+            case 174 /* ObjectBindingPattern */:
+                return ts.updateObjectBindingPattern(node, nodesVisitor(node.elements, visitor, ts.isBindingElement));
+            case 175 /* ArrayBindingPattern */:
+                return ts.updateArrayBindingPattern(node, nodesVisitor(node.elements, visitor, ts.isArrayBindingElement));
+            case 176 /* BindingElement */:
+                return ts.updateBindingElement(node, visitNode(node.dotDotDotToken, tokenVisitor, ts.isToken), visitNode(node.propertyName, visitor, ts.isPropertyName), visitNode(node.name, visitor, ts.isBindingName), visitNode(node.initializer, visitor, ts.isExpression));
+            // Expression
+            case 177 /* ArrayLiteralExpression */:
+                return ts.updateArrayLiteral(node, nodesVisitor(node.elements, visitor, ts.isExpression));
+            case 178 /* ObjectLiteralExpression */:
+                return ts.updateObjectLiteral(node, nodesVisitor(node.properties, visitor, ts.isObjectLiteralElementLike));
+            case 179 /* PropertyAccessExpression */:
+                return ts.updatePropertyAccess(node, visitNode(node.expression, visitor, ts.isExpression), visitNode(node.name, visitor, ts.isIdentifier));
+            case 180 /* ElementAccessExpression */:
+                return ts.updateElementAccess(node, visitNode(node.expression, visitor, ts.isExpression), visitNode(node.argumentExpression, visitor, ts.isExpression));
+            case 181 /* CallExpression */:
+                return ts.updateCall(node, visitNode(node.expression, visitor, ts.isExpression), nodesVisitor(node.typeArguments, visitor, ts.isTypeNode), nodesVisitor(node.arguments, visitor, ts.isExpression));
+            case 182 /* NewExpression */:
+                return ts.updateNew(node, visitNode(node.expression, visitor, ts.isExpression), nodesVisitor(node.typeArguments, visitor, ts.isTypeNode), nodesVisitor(node.arguments, visitor, ts.isExpression));
+            case 183 /* TaggedTemplateExpression */:
+                return ts.updateTaggedTemplate(node, visitNode(node.tag, visitor, ts.isExpression), visitNode(node.template, visitor, ts.isTemplateLiteral));
+            case 184 /* TypeAssertionExpression */:
+                return ts.updateTypeAssertion(node, visitNode(node.type, visitor, ts.isTypeNode), visitNode(node.expression, visitor, ts.isExpression));
+            case 185 /* ParenthesizedExpression */:
+                return ts.updateParen(node, visitNode(node.expression, visitor, ts.isExpression));
+            case 186 /* FunctionExpression */:
+                return ts.updateFunctionExpression(node, nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.asteriskToken, tokenVisitor, ts.isToken), visitNode(node.name, visitor, ts.isIdentifier), nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), visitParameterList(node.parameters, visitor, context, nodesVisitor), visitNode(node.type, visitor, ts.isTypeNode), visitFunctionBody(node.body, visitor, context));
+            case 187 /* ArrowFunction */:
+                return ts.updateArrowFunction(node, nodesVisitor(node.modifiers, visitor, ts.isModifier), nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), visitParameterList(node.parameters, visitor, context, nodesVisitor), visitNode(node.type, visitor, ts.isTypeNode), visitFunctionBody(node.body, visitor, context));
+            case 188 /* DeleteExpression */:
+                return ts.updateDelete(node, visitNode(node.expression, visitor, ts.isExpression));
+            case 189 /* TypeOfExpression */:
+                return ts.updateTypeOf(node, visitNode(node.expression, visitor, ts.isExpression));
+            case 190 /* VoidExpression */:
+                return ts.updateVoid(node, visitNode(node.expression, visitor, ts.isExpression));
+            case 191 /* AwaitExpression */:
+                return ts.updateAwait(node, visitNode(node.expression, visitor, ts.isExpression));
+            case 192 /* PrefixUnaryExpression */:
+                return ts.updatePrefix(node, visitNode(node.operand, visitor, ts.isExpression));
+            case 193 /* PostfixUnaryExpression */:
+                return ts.updatePostfix(node, visitNode(node.operand, visitor, ts.isExpression));
+            case 194 /* BinaryExpression */:
+                return ts.updateBinary(node, visitNode(node.left, visitor, ts.isExpression), visitNode(node.right, visitor, ts.isExpression), visitNode(node.operatorToken, visitor, ts.isToken));
+            case 195 /* ConditionalExpression */:
+                return ts.updateConditional(node, visitNode(node.condition, visitor, ts.isExpression), visitNode(node.whenTrue, visitor, ts.isExpression), visitNode(node.whenFalse, visitor, ts.isExpression));
+            case 196 /* TemplateExpression */:
+                return ts.updateTemplateExpression(node, visitNode(node.head, visitor, ts.isTemplateHead), nodesVisitor(node.templateSpans, visitor, ts.isTemplateSpan));
+            case 197 /* YieldExpression */:
+                return ts.updateYield(node, visitNode(node.asteriskToken, tokenVisitor, ts.isToken), visitNode(node.expression, visitor, ts.isExpression));
+            case 198 /* SpreadElement */:
+                return ts.updateSpread(node, visitNode(node.expression, visitor, ts.isExpression));
+            case 199 /* ClassExpression */:
+                return ts.updateClassExpression(node, nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isIdentifier), nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), nodesVisitor(node.heritageClauses, visitor, ts.isHeritageClause), nodesVisitor(node.members, visitor, ts.isClassElement));
+            case 201 /* ExpressionWithTypeArguments */:
+                return ts.updateExpressionWithTypeArguments(node, nodesVisitor(node.typeArguments, visitor, ts.isTypeNode), visitNode(node.expression, visitor, ts.isExpression));
+            case 202 /* AsExpression */:
+                return ts.updateAsExpression(node, visitNode(node.expression, visitor, ts.isExpression), visitNode(node.type, visitor, ts.isTypeNode));
+            case 203 /* NonNullExpression */:
+                return ts.updateNonNullExpression(node, visitNode(node.expression, visitor, ts.isExpression));
+            case 204 /* MetaProperty */:
+                return ts.updateMetaProperty(node, visitNode(node.name, visitor, ts.isIdentifier));
+            // Misc
+            case 205 /* TemplateSpan */:
+                return ts.updateTemplateSpan(node, visitNode(node.expression, visitor, ts.isExpression), visitNode(node.literal, visitor, ts.isTemplateMiddleOrTemplateTail));
+            // Element
+            case 207 /* Block */:
+                return ts.updateBlock(node, nodesVisitor(node.statements, visitor, ts.isStatement));
+            case 208 /* VariableStatement */:
+                return ts.updateVariableStatement(node, nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.declarationList, visitor, ts.isVariableDeclarationList));
+            case 210 /* ExpressionStatement */:
+                return ts.updateStatement(node, visitNode(node.expression, visitor, ts.isExpression));
+            case 211 /* IfStatement */:
+                return ts.updateIf(node, visitNode(node.expression, visitor, ts.isExpression), visitNode(node.thenStatement, visitor, ts.isStatement, ts.liftToBlock), visitNode(node.elseStatement, visitor, ts.isStatement, ts.liftToBlock));
+            case 212 /* DoStatement */:
+                return ts.updateDo(node, visitNode(node.statement, visitor, ts.isStatement, ts.liftToBlock), visitNode(node.expression, visitor, ts.isExpression));
+            case 213 /* WhileStatement */:
+                return ts.updateWhile(node, visitNode(node.expression, visitor, ts.isExpression), visitNode(node.statement, visitor, ts.isStatement, ts.liftToBlock));
+            case 214 /* ForStatement */:
+                return ts.updateFor(node, visitNode(node.initializer, visitor, ts.isForInitializer), visitNode(node.condition, visitor, ts.isExpression), visitNode(node.incrementor, visitor, ts.isExpression), visitNode(node.statement, visitor, ts.isStatement, ts.liftToBlock));
+            case 215 /* ForInStatement */:
+                return ts.updateForIn(node, visitNode(node.initializer, visitor, ts.isForInitializer), visitNode(node.expression, visitor, ts.isExpression), visitNode(node.statement, visitor, ts.isStatement, ts.liftToBlock));
+            case 216 /* ForOfStatement */:
+                return ts.updateForOf(node, node.awaitModifier, visitNode(node.initializer, visitor, ts.isForInitializer), visitNode(node.expression, visitor, ts.isExpression), visitNode(node.statement, visitor, ts.isStatement, ts.liftToBlock));
+            case 217 /* ContinueStatement */:
+                return ts.updateContinue(node, visitNode(node.label, visitor, ts.isIdentifier));
+            case 218 /* BreakStatement */:
+                return ts.updateBreak(node, visitNode(node.label, visitor, ts.isIdentifier));
+            case 219 /* ReturnStatement */:
+                return ts.updateReturn(node, visitNode(node.expression, visitor, ts.isExpression));
+            case 220 /* WithStatement */:
+                return ts.updateWith(node, visitNode(node.expression, visitor, ts.isExpression), visitNode(node.statement, visitor, ts.isStatement, ts.liftToBlock));
+            case 221 /* SwitchStatement */:
+                return ts.updateSwitch(node, visitNode(node.expression, visitor, ts.isExpression), visitNode(node.caseBlock, visitor, ts.isCaseBlock));
+            case 222 /* LabeledStatement */:
+                return ts.updateLabel(node, visitNode(node.label, visitor, ts.isIdentifier), visitNode(node.statement, visitor, ts.isStatement, ts.liftToBlock));
+            case 223 /* ThrowStatement */:
+                return ts.updateThrow(node, visitNode(node.expression, visitor, ts.isExpression));
+            case 224 /* TryStatement */:
+                return ts.updateTry(node, visitNode(node.tryBlock, visitor, ts.isBlock), visitNode(node.catchClause, visitor, ts.isCatchClause), visitNode(node.finallyBlock, visitor, ts.isBlock));
+            case 226 /* VariableDeclaration */:
+                return ts.updateVariableDeclaration(node, visitNode(node.name, visitor, ts.isBindingName), visitNode(node.type, visitor, ts.isTypeNode), visitNode(node.initializer, visitor, ts.isExpression));
+            case 227 /* VariableDeclarationList */:
+                return ts.updateVariableDeclarationList(node, nodesVisitor(node.declarations, visitor, ts.isVariableDeclaration));
+            case 228 /* FunctionDeclaration */:
+                return ts.updateFunctionDeclaration(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.asteriskToken, tokenVisitor, ts.isToken), visitNode(node.name, visitor, ts.isIdentifier), nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), visitParameterList(node.parameters, visitor, context, nodesVisitor), visitNode(node.type, visitor, ts.isTypeNode), visitFunctionBody(node.body, visitor, context));
+            case 229 /* ClassDeclaration */:
+                return ts.updateClassDeclaration(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isIdentifier), nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), nodesVisitor(node.heritageClauses, visitor, ts.isHeritageClause), nodesVisitor(node.members, visitor, ts.isClassElement));
+            case 230 /* InterfaceDeclaration */:
+                return ts.updateInterfaceDeclaration(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isIdentifier), nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), nodesVisitor(node.heritageClauses, visitor, ts.isHeritageClause), nodesVisitor(node.members, visitor, ts.isTypeElement));
+            case 231 /* TypeAliasDeclaration */:
+                return ts.updateTypeAliasDeclaration(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isIdentifier), nodesVisitor(node.typeParameters, visitor, ts.isTypeParameterDeclaration), visitNode(node.type, visitor, ts.isTypeNode));
+            case 232 /* EnumDeclaration */:
+                return ts.updateEnumDeclaration(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isIdentifier), nodesVisitor(node.members, visitor, ts.isEnumMember));
+            case 233 /* ModuleDeclaration */:
+                return ts.updateModuleDeclaration(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isIdentifier), visitNode(node.body, visitor, ts.isModuleBody));
+            case 234 /* ModuleBlock */:
+                return ts.updateModuleBlock(node, nodesVisitor(node.statements, visitor, ts.isStatement));
+            case 235 /* CaseBlock */:
+                return ts.updateCaseBlock(node, nodesVisitor(node.clauses, visitor, ts.isCaseOrDefaultClause));
+            case 236 /* NamespaceExportDeclaration */:
+                return ts.updateNamespaceExportDeclaration(node, visitNode(node.name, visitor, ts.isIdentifier));
+            case 237 /* ImportEqualsDeclaration */:
+                return ts.updateImportEqualsDeclaration(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isIdentifier), visitNode(node.moduleReference, visitor, ts.isModuleReference));
+            case 238 /* ImportDeclaration */:
+                return ts.updateImportDeclaration(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.importClause, visitor, ts.isImportClause), visitNode(node.moduleSpecifier, visitor, ts.isExpression));
+            case 239 /* ImportClause */:
+                return ts.updateImportClause(node, visitNode(node.name, visitor, ts.isIdentifier), visitNode(node.namedBindings, visitor, ts.isNamedImportBindings));
+            case 240 /* NamespaceImport */:
+                return ts.updateNamespaceImport(node, visitNode(node.name, visitor, ts.isIdentifier));
+            case 241 /* NamedImports */:
+                return ts.updateNamedImports(node, nodesVisitor(node.elements, visitor, ts.isImportSpecifier));
+            case 242 /* ImportSpecifier */:
+                return ts.updateImportSpecifier(node, visitNode(node.propertyName, visitor, ts.isIdentifier), visitNode(node.name, visitor, ts.isIdentifier));
+            case 243 /* ExportAssignment */:
+                return ts.updateExportAssignment(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.expression, visitor, ts.isExpression));
+            case 244 /* ExportDeclaration */:
+                return ts.updateExportDeclaration(node, nodesVisitor(node.decorators, visitor, ts.isDecorator), nodesVisitor(node.modifiers, visitor, ts.isModifier), visitNode(node.exportClause, visitor, ts.isNamedExports), visitNode(node.moduleSpecifier, visitor, ts.isExpression));
+            case 245 /* NamedExports */:
+                return ts.updateNamedExports(node, nodesVisitor(node.elements, visitor, ts.isExportSpecifier));
+            case 246 /* ExportSpecifier */:
+                return ts.updateExportSpecifier(node, visitNode(node.propertyName, visitor, ts.isIdentifier), visitNode(node.name, visitor, ts.isIdentifier));
+            // Module references
+            case 248 /* ExternalModuleReference */:
+                return ts.updateExternalModuleReference(node, visitNode(node.expression, visitor, ts.isExpression));
+            // JSX
+            case 249 /* JsxElement */:
+                return ts.updateJsxElement(node, visitNode(node.openingElement, visitor, ts.isJsxOpeningElement), nodesVisitor(node.children, visitor, ts.isJsxChild), visitNode(node.closingElement, visitor, ts.isJsxClosingElement));
+            case 250 /* JsxSelfClosingElement */:
+                return ts.updateJsxSelfClosingElement(node, visitNode(node.tagName, visitor, ts.isJsxTagNameExpression), visitNode(node.attributes, visitor, ts.isJsxAttributes));
+            case 251 /* JsxOpeningElement */:
+                return ts.updateJsxOpeningElement(node, visitNode(node.tagName, visitor, ts.isJsxTagNameExpression), visitNode(node.attributes, visitor, ts.isJsxAttributes));
+            case 252 /* JsxClosingElement */:
+                return ts.updateJsxClosingElement(node, visitNode(node.tagName, visitor, ts.isJsxTagNameExpression));
+            case 253 /* JsxAttribute */:
+                return ts.updateJsxAttribute(node, visitNode(node.name, visitor, ts.isIdentifier), visitNode(node.initializer, visitor, ts.isStringLiteralOrJsxExpression));
+            case 254 /* JsxAttributes */:
+                return ts.updateJsxAttributes(node, nodesVisitor(node.properties, visitor, ts.isJsxAttributeLike));
+            case 255 /* JsxSpreadAttribute */:
+                return ts.updateJsxSpreadAttribute(node, visitNode(node.expression, visitor, ts.isExpression));
+            case 256 /* JsxExpression */:
+                return ts.updateJsxExpression(node, visitNode(node.expression, visitor, ts.isExpression));
+            // Clauses
+            case 257 /* CaseClause */:
+                return ts.updateCaseClause(node, visitNode(node.expression, visitor, ts.isExpression), nodesVisitor(node.statements, visitor, ts.isStatement));
+            case 258 /* DefaultClause */:
+                return ts.updateDefaultClause(node, nodesVisitor(node.statements, visitor, ts.isStatement));
+            case 259 /* HeritageClause */:
+                return ts.updateHeritageClause(node, nodesVisitor(node.types, visitor, ts.isExpressionWithTypeArguments));
+            case 260 /* CatchClause */:
+                return ts.updateCatchClause(node, visitNode(node.variableDeclaration, visitor, ts.isVariableDeclaration), visitNode(node.block, visitor, ts.isBlock));
+            // Property assignments
+            case 261 /* PropertyAssignment */:
+                return ts.updatePropertyAssignment(node, visitNode(node.name, visitor, ts.isPropertyName), visitNode(node.initializer, visitor, ts.isExpression));
+            case 262 /* ShorthandPropertyAssignment */:
+                return ts.updateShorthandPropertyAssignment(node, visitNode(node.name, visitor, ts.isIdentifier), visitNode(node.objectAssignmentInitializer, visitor, ts.isExpression));
+            case 263 /* SpreadAssignment */:
+                return ts.updateSpreadAssignment(node, visitNode(node.expression, visitor, ts.isExpression));
+            // Enum
+            case 264 /* EnumMember */:
+                return ts.updateEnumMember(node, visitNode(node.name, visitor, ts.isPropertyName), visitNode(node.initializer, visitor, ts.isExpression));
+            // Top-level nodes
+            case 265 /* SourceFile */:
+                return ts.updateSourceFileNode(node, visitLexicalEnvironment(node.statements, visitor, context));
+            // Transformation nodes
+            case 297 /* PartiallyEmittedExpression */:
+                return ts.updatePartiallyEmittedExpression(node, visitNode(node.expression, visitor, ts.isExpression));
+            case 298 /* CommaListExpression */:
+                return ts.updateCommaList(node, nodesVisitor(node.elements, visitor, ts.isExpression));
+            default:
+                // No need to visit nodes with no children.
+                return node;
         }
     }
-    ts.writeDeclarationFile = writeDeclarationFile;
-})(ts || (ts = {}));
-/// <reference path="checker.ts" />
-/// <reference path="factory.ts" />
-/// <reference path="utilities.ts" />
-/* @internal */
-var ts;
-(function (ts) {
-    ;
+    ts.visitEachChild = visitEachChild;
     /**
-     * This map contains information about the shape of each Node in "types.ts" pertaining to how
-     * each node should be traversed during a transformation.
-     *
-     * Each edge corresponds to a property in a Node subtype that should be traversed when visiting
-     * each child. The properties are assigned in the order in which traversal should occur.
-     *
-     * We only add entries for nodes that do not have a create/update pair defined in factory.ts
+     * Extracts the single node from a NodeArray.
      *
-     * NOTE: This needs to be kept up to date with changes to nodes in "types.ts". Currently, this
-     *       map is not comprehensive. Only node edges relevant to tree transformation are
-     *       currently defined. We may extend this to be more comprehensive, and eventually
-     *       supplant the existing `forEachChild` implementation if performance is not
-     *       significantly impacted.
+     * @param nodes The NodeArray.
      */
-    var nodeEdgeTraversalMap = ts.createMap((_a = {},
-        _a[139 /* QualifiedName */] = [
-            { name: "left", test: ts.isEntityName },
-            { name: "right", test: ts.isIdentifier }
-        ],
-        _a[143 /* Decorator */] = [
-            { name: "expression", test: ts.isLeftHandSideExpression }
-        ],
-        _a[177 /* TypeAssertionExpression */] = [
-            { name: "type", test: ts.isTypeNode },
-            { name: "expression", test: ts.isUnaryExpression }
-        ],
-        _a[195 /* AsExpression */] = [
-            { name: "expression", test: ts.isExpression },
-            { name: "type", test: ts.isTypeNode }
-        ],
-        _a[196 /* NonNullExpression */] = [
-            { name: "expression", test: ts.isLeftHandSideExpression }
-        ],
-        _a[224 /* EnumDeclaration */] = [
-            { name: "decorators", test: ts.isDecorator },
-            { name: "modifiers", test: ts.isModifier },
-            { name: "name", test: ts.isIdentifier },
-            { name: "members", test: ts.isEnumMember }
-        ],
-        _a[225 /* ModuleDeclaration */] = [
-            { name: "decorators", test: ts.isDecorator },
-            { name: "modifiers", test: ts.isModifier },
-            { name: "name", test: ts.isModuleName },
-            { name: "body", test: ts.isModuleBody }
-        ],
-        _a[226 /* ModuleBlock */] = [
-            { name: "statements", test: ts.isStatement }
-        ],
-        _a[229 /* ImportEqualsDeclaration */] = [
-            { name: "decorators", test: ts.isDecorator },
-            { name: "modifiers", test: ts.isModifier },
-            { name: "name", test: ts.isIdentifier },
-            { name: "moduleReference", test: ts.isModuleReference }
-        ],
-        _a[240 /* ExternalModuleReference */] = [
-            { name: "expression", test: ts.isExpression, optional: true }
-        ],
-        _a[255 /* EnumMember */] = [
-            { name: "name", test: ts.isPropertyName },
-            { name: "initializer", test: ts.isExpression, optional: true, parenthesize: ts.parenthesizeExpressionForList }
-        ],
-        _a));
+    function extractSingleNode(nodes) {
+        ts.Debug.assert(nodes.length <= 1, "Too many nodes written to output.");
+        return ts.singleOrUndefined(nodes);
+    }
+})(ts || (ts = {}));
+/* @internal */
+(function (ts) {
     function reduceNode(node, f, initial) {
         return node ? f(initial, node) : initial;
     }
+    function reduceNodeArray(nodes, f, initial) {
+        return nodes ? f(initial, nodes) : initial;
+    }
     /**
      * Similar to `reduceLeft`, performs a reduction against each child of a node.
-     * NOTE: Unlike `forEachChild`, this does *not* visit every node. Only nodes added to the
-     *       `nodeEdgeTraversalMap` above will be visited.
+     * NOTE: Unlike `forEachChild`, this does *not* visit every node.
      *
      * @param node The node containing the children to reduce.
-     * @param f The callback function
      * @param initial The initial value to supply to the reduction.
+     * @param f The callback function
      */
-    function reduceEachChild(node, f, initial) {
+    function reduceEachChild(node, initial, cbNode, cbNodeArray) {
         if (node === undefined) {
             return initial;
         }
+        var reduceNodes = cbNodeArray ? reduceNodeArray : ts.reduceLeft;
+        var cbNodes = cbNodeArray || cbNode;
         var kind = node.kind;
         // No need to visit nodes with no children.
-        if ((kind > 0 /* FirstToken */ && kind <= 138 /* LastToken */)) {
+        if ((kind > 0 /* FirstToken */ && kind <= 142 /* LastToken */)) {
             return initial;
         }
         // We do not yet support types.
-        if ((kind >= 154 /* TypePredicate */ && kind <= 166 /* LiteralType */)) {
+        if ((kind >= 158 /* TypePredicate */ && kind <= 173 /* LiteralType */)) {
             return initial;
         }
         var result = initial;
         switch (node.kind) {
             // Leaf nodes
-            case 198 /* SemicolonClassElement */:
-            case 201 /* EmptyStatement */:
-            case 193 /* OmittedExpression */:
-            case 217 /* DebuggerStatement */:
-            case 287 /* NotEmittedStatement */:
+            case 206 /* SemicolonClassElement */:
+            case 209 /* EmptyStatement */:
+            case 200 /* OmittedExpression */:
+            case 225 /* DebuggerStatement */:
+            case 296 /* NotEmittedStatement */:
                 // No need to visit nodes with no children.
                 break;
             // Names
-            case 140 /* ComputedPropertyName */:
-                result = reduceNode(node.expression, f, result);
+            case 143 /* QualifiedName */:
+                result = reduceNode(node.left, cbNode, result);
+                result = reduceNode(node.right, cbNode, result);
+                break;
+            case 144 /* ComputedPropertyName */:
+                result = reduceNode(node.expression, cbNode, result);
                 break;
             // Signature elements
-            case 142 /* Parameter */:
-                result = ts.reduceLeft(node.decorators, f, result);
-                result = ts.reduceLeft(node.modifiers, f, result);
-                result = reduceNode(node.name, f, result);
-                result = reduceNode(node.type, f, result);
-                result = reduceNode(node.initializer, f, result);
+            case 146 /* Parameter */:
+                result = reduceNodes(node.decorators, cbNodes, result);
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNode(node.type, cbNode, result);
+                result = reduceNode(node.initializer, cbNode, result);
                 break;
-            case 143 /* Decorator */:
-                result = reduceNode(node.expression, f, result);
+            case 147 /* Decorator */:
+                result = reduceNode(node.expression, cbNode, result);
                 break;
             // Type member
-            case 145 /* PropertyDeclaration */:
-                result = ts.reduceLeft(node.decorators, f, result);
-                result = ts.reduceLeft(node.modifiers, f, result);
-                result = reduceNode(node.name, f, result);
-                result = reduceNode(node.type, f, result);
-                result = reduceNode(node.initializer, f, result);
+            case 148 /* PropertySignature */:
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNode(node.questionToken, cbNode, result);
+                result = reduceNode(node.type, cbNode, result);
+                result = reduceNode(node.initializer, cbNode, result);
+                break;
+            case 149 /* PropertyDeclaration */:
+                result = reduceNodes(node.decorators, cbNodes, result);
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNode(node.type, cbNode, result);
+                result = reduceNode(node.initializer, cbNode, result);
                 break;
-            case 147 /* MethodDeclaration */:
-                result = ts.reduceLeft(node.decorators, f, result);
-                result = ts.reduceLeft(node.modifiers, f, result);
-                result = reduceNode(node.name, f, result);
-                result = ts.reduceLeft(node.typeParameters, f, result);
-                result = ts.reduceLeft(node.parameters, f, result);
-                result = reduceNode(node.type, f, result);
-                result = reduceNode(node.body, f, result);
+            case 151 /* MethodDeclaration */:
+                result = reduceNodes(node.decorators, cbNodes, result);
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNodes(node.typeParameters, cbNodes, result);
+                result = reduceNodes(node.parameters, cbNodes, result);
+                result = reduceNode(node.type, cbNode, result);
+                result = reduceNode(node.body, cbNode, result);
                 break;
-            case 148 /* Constructor */:
-                result = ts.reduceLeft(node.modifiers, f, result);
-                result = ts.reduceLeft(node.parameters, f, result);
-                result = reduceNode(node.body, f, result);
+            case 152 /* Constructor */:
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNodes(node.parameters, cbNodes, result);
+                result = reduceNode(node.body, cbNode, result);
                 break;
-            case 149 /* GetAccessor */:
-                result = ts.reduceLeft(node.decorators, f, result);
-                result = ts.reduceLeft(node.modifiers, f, result);
-                result = reduceNode(node.name, f, result);
-                result = ts.reduceLeft(node.parameters, f, result);
-                result = reduceNode(node.type, f, result);
-                result = reduceNode(node.body, f, result);
+            case 153 /* GetAccessor */:
+                result = reduceNodes(node.decorators, cbNodes, result);
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNodes(node.parameters, cbNodes, result);
+                result = reduceNode(node.type, cbNode, result);
+                result = reduceNode(node.body, cbNode, result);
                 break;
-            case 150 /* SetAccessor */:
-                result = ts.reduceLeft(node.decorators, f, result);
-                result = ts.reduceLeft(node.modifiers, f, result);
-                result = reduceNode(node.name, f, result);
-                result = ts.reduceLeft(node.parameters, f, result);
-                result = reduceNode(node.body, f, result);
+            case 154 /* SetAccessor */:
+                result = reduceNodes(node.decorators, cbNodes, result);
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNodes(node.parameters, cbNodes, result);
+                result = reduceNode(node.body, cbNode, result);
                 break;
             // Binding patterns
-            case 167 /* ObjectBindingPattern */:
-            case 168 /* ArrayBindingPattern */:
-                result = ts.reduceLeft(node.elements, f, result);
+            case 174 /* ObjectBindingPattern */:
+            case 175 /* ArrayBindingPattern */:
+                result = reduceNodes(node.elements, cbNodes, result);
                 break;
-            case 169 /* BindingElement */:
-                result = reduceNode(node.propertyName, f, result);
-                result = reduceNode(node.name, f, result);
-                result = reduceNode(node.initializer, f, result);
+            case 176 /* BindingElement */:
+                result = reduceNode(node.propertyName, cbNode, result);
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNode(node.initializer, cbNode, result);
                 break;
             // Expression
-            case 170 /* ArrayLiteralExpression */:
-                result = ts.reduceLeft(node.elements, f, result);
+            case 177 /* ArrayLiteralExpression */:
+                result = reduceNodes(node.elements, cbNodes, result);
+                break;
+            case 178 /* ObjectLiteralExpression */:
+                result = reduceNodes(node.properties, cbNodes, result);
+                break;
+            case 179 /* PropertyAccessExpression */:
+                result = reduceNode(node.expression, cbNode, result);
+                result = reduceNode(node.name, cbNode, result);
                 break;
-            case 171 /* ObjectLiteralExpression */:
-                result = ts.reduceLeft(node.properties, f, result);
+            case 180 /* ElementAccessExpression */:
+                result = reduceNode(node.expression, cbNode, result);
+                result = reduceNode(node.argumentExpression, cbNode, result);
                 break;
-            case 172 /* PropertyAccessExpression */:
-                result = reduceNode(node.expression, f, result);
-                result = reduceNode(node.name, f, result);
+            case 181 /* CallExpression */:
+                result = reduceNode(node.expression, cbNode, result);
+                result = reduceNodes(node.typeArguments, cbNodes, result);
+                result = reduceNodes(node.arguments, cbNodes, result);
                 break;
-            case 173 /* ElementAccessExpression */:
-                result = reduceNode(node.expression, f, result);
-                result = reduceNode(node.argumentExpression, f, result);
+            case 182 /* NewExpression */:
+                result = reduceNode(node.expression, cbNode, result);
+                result = reduceNodes(node.typeArguments, cbNodes, result);
+                result = reduceNodes(node.arguments, cbNodes, result);
                 break;
-            case 174 /* CallExpression */:
-                result = reduceNode(node.expression, f, result);
-                result = ts.reduceLeft(node.typeArguments, f, result);
-                result = ts.reduceLeft(node.arguments, f, result);
+            case 183 /* TaggedTemplateExpression */:
+                result = reduceNode(node.tag, cbNode, result);
+                result = reduceNode(node.template, cbNode, result);
                 break;
-            case 175 /* NewExpression */:
-                result = reduceNode(node.expression, f, result);
-                result = ts.reduceLeft(node.typeArguments, f, result);
-                result = ts.reduceLeft(node.arguments, f, result);
+            case 184 /* TypeAssertionExpression */:
+                result = reduceNode(node.type, cbNode, result);
+                result = reduceNode(node.expression, cbNode, result);
                 break;
-            case 176 /* TaggedTemplateExpression */:
-                result = reduceNode(node.tag, f, result);
-                result = reduceNode(node.template, f, result);
+            case 186 /* FunctionExpression */:
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNodes(node.typeParameters, cbNodes, result);
+                result = reduceNodes(node.parameters, cbNodes, result);
+                result = reduceNode(node.type, cbNode, result);
+                result = reduceNode(node.body, cbNode, result);
                 break;
-            case 179 /* FunctionExpression */:
-                result = ts.reduceLeft(node.modifiers, f, result);
-                result = reduceNode(node.name, f, result);
-                result = ts.reduceLeft(node.typeParameters, f, result);
-                result = ts.reduceLeft(node.parameters, f, result);
-                result = reduceNode(node.type, f, result);
-                result = reduceNode(node.body, f, result);
+            case 187 /* ArrowFunction */:
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNodes(node.typeParameters, cbNodes, result);
+                result = reduceNodes(node.parameters, cbNodes, result);
+                result = reduceNode(node.type, cbNode, result);
+                result = reduceNode(node.body, cbNode, result);
                 break;
-            case 180 /* ArrowFunction */:
-                result = ts.reduceLeft(node.modifiers, f, result);
-                result = ts.reduceLeft(node.typeParameters, f, result);
-                result = ts.reduceLeft(node.parameters, f, result);
-                result = reduceNode(node.type, f, result);
-                result = reduceNode(node.body, f, result);
+            case 185 /* ParenthesizedExpression */:
+            case 188 /* DeleteExpression */:
+            case 189 /* TypeOfExpression */:
+            case 190 /* VoidExpression */:
+            case 191 /* AwaitExpression */:
+            case 197 /* YieldExpression */:
+            case 198 /* SpreadElement */:
+            case 203 /* NonNullExpression */:
+                result = reduceNode(node.expression, cbNode, result);
                 break;
-            case 178 /* ParenthesizedExpression */:
-            case 181 /* DeleteExpression */:
-            case 182 /* TypeOfExpression */:
-            case 183 /* VoidExpression */:
-            case 184 /* AwaitExpression */:
-            case 190 /* YieldExpression */:
-            case 191 /* SpreadElementExpression */:
-            case 196 /* NonNullExpression */:
-                result = reduceNode(node.expression, f, result);
+            case 192 /* PrefixUnaryExpression */:
+            case 193 /* PostfixUnaryExpression */:
+                result = reduceNode(node.operand, cbNode, result);
                 break;
-            case 185 /* PrefixUnaryExpression */:
-            case 186 /* PostfixUnaryExpression */:
-                result = reduceNode(node.operand, f, result);
+            case 194 /* BinaryExpression */:
+                result = reduceNode(node.left, cbNode, result);
+                result = reduceNode(node.right, cbNode, result);
                 break;
-            case 187 /* BinaryExpression */:
-                result = reduceNode(node.left, f, result);
-                result = reduceNode(node.right, f, result);
+            case 195 /* ConditionalExpression */:
+                result = reduceNode(node.condition, cbNode, result);
+                result = reduceNode(node.whenTrue, cbNode, result);
+                result = reduceNode(node.whenFalse, cbNode, result);
                 break;
-            case 188 /* ConditionalExpression */:
-                result = reduceNode(node.condition, f, result);
-                result = reduceNode(node.whenTrue, f, result);
-                result = reduceNode(node.whenFalse, f, result);
+            case 196 /* TemplateExpression */:
+                result = reduceNode(node.head, cbNode, result);
+                result = reduceNodes(node.templateSpans, cbNodes, result);
                 break;
-            case 189 /* TemplateExpression */:
-                result = reduceNode(node.head, f, result);
-                result = ts.reduceLeft(node.templateSpans, f, result);
+            case 199 /* ClassExpression */:
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNodes(node.typeParameters, cbNodes, result);
+                result = reduceNodes(node.heritageClauses, cbNodes, result);
+                result = reduceNodes(node.members, cbNodes, result);
                 break;
-            case 192 /* ClassExpression */:
-                result = ts.reduceLeft(node.modifiers, f, result);
-                result = reduceNode(node.name, f, result);
-                result = ts.reduceLeft(node.typeParameters, f, result);
-                result = ts.reduceLeft(node.heritageClauses, f, result);
-                result = ts.reduceLeft(node.members, f, result);
+            case 201 /* ExpressionWithTypeArguments */:
+                result = reduceNode(node.expression, cbNode, result);
+                result = reduceNodes(node.typeArguments, cbNodes, result);
                 break;
-            case 194 /* ExpressionWithTypeArguments */:
-                result = reduceNode(node.expression, f, result);
-                result = ts.reduceLeft(node.typeArguments, f, result);
+            case 202 /* AsExpression */:
+                result = reduceNode(node.expression, cbNode, result);
+                result = reduceNode(node.type, cbNode, result);
+                break;
+            case 203 /* NonNullExpression */:
+                result = reduceNode(node.expression, cbNode, result);
                 break;
             // Misc
-            case 197 /* TemplateSpan */:
-                result = reduceNode(node.expression, f, result);
-                result = reduceNode(node.literal, f, result);
+            case 205 /* TemplateSpan */:
+                result = reduceNode(node.expression, cbNode, result);
+                result = reduceNode(node.literal, cbNode, result);
                 break;
             // Element
-            case 199 /* Block */:
-                result = ts.reduceLeft(node.statements, f, result);
+            case 207 /* Block */:
+                result = reduceNodes(node.statements, cbNodes, result);
+                break;
+            case 208 /* VariableStatement */:
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNode(node.declarationList, cbNode, result);
+                break;
+            case 210 /* ExpressionStatement */:
+                result = reduceNode(node.expression, cbNode, result);
+                break;
+            case 211 /* IfStatement */:
+                result = reduceNode(node.expression, cbNode, result);
+                result = reduceNode(node.thenStatement, cbNode, result);
+                result = reduceNode(node.elseStatement, cbNode, result);
                 break;
-            case 200 /* VariableStatement */:
-                result = ts.reduceLeft(node.modifiers, f, result);
-                result = reduceNode(node.declarationList, f, result);
+            case 212 /* DoStatement */:
+                result = reduceNode(node.statement, cbNode, result);
+                result = reduceNode(node.expression, cbNode, result);
                 break;
-            case 202 /* ExpressionStatement */:
-                result = reduceNode(node.expression, f, result);
+            case 213 /* WhileStatement */:
+            case 220 /* WithStatement */:
+                result = reduceNode(node.expression, cbNode, result);
+                result = reduceNode(node.statement, cbNode, result);
                 break;
-            case 203 /* IfStatement */:
-                result = reduceNode(node.expression, f, result);
-                result = reduceNode(node.thenStatement, f, result);
-                result = reduceNode(node.elseStatement, f, result);
+            case 214 /* ForStatement */:
+                result = reduceNode(node.initializer, cbNode, result);
+                result = reduceNode(node.condition, cbNode, result);
+                result = reduceNode(node.incrementor, cbNode, result);
+                result = reduceNode(node.statement, cbNode, result);
                 break;
-            case 204 /* DoStatement */:
-                result = reduceNode(node.statement, f, result);
-                result = reduceNode(node.expression, f, result);
+            case 215 /* ForInStatement */:
+            case 216 /* ForOfStatement */:
+                result = reduceNode(node.initializer, cbNode, result);
+                result = reduceNode(node.expression, cbNode, result);
+                result = reduceNode(node.statement, cbNode, result);
                 break;
-            case 205 /* WhileStatement */:
-            case 212 /* WithStatement */:
-                result = reduceNode(node.expression, f, result);
-                result = reduceNode(node.statement, f, result);
+            case 219 /* ReturnStatement */:
+            case 223 /* ThrowStatement */:
+                result = reduceNode(node.expression, cbNode, result);
                 break;
-            case 206 /* ForStatement */:
-                result = reduceNode(node.initializer, f, result);
-                result = reduceNode(node.condition, f, result);
-                result = reduceNode(node.incrementor, f, result);
-                result = reduceNode(node.statement, f, result);
+            case 221 /* SwitchStatement */:
+                result = reduceNode(node.expression, cbNode, result);
+                result = reduceNode(node.caseBlock, cbNode, result);
                 break;
-            case 207 /* ForInStatement */:
-            case 208 /* ForOfStatement */:
-                result = reduceNode(node.initializer, f, result);
-                result = reduceNode(node.expression, f, result);
-                result = reduceNode(node.statement, f, result);
+            case 222 /* LabeledStatement */:
+                result = reduceNode(node.label, cbNode, result);
+                result = reduceNode(node.statement, cbNode, result);
                 break;
-            case 211 /* ReturnStatement */:
-            case 215 /* ThrowStatement */:
-                result = reduceNode(node.expression, f, result);
+            case 224 /* TryStatement */:
+                result = reduceNode(node.tryBlock, cbNode, result);
+                result = reduceNode(node.catchClause, cbNode, result);
+                result = reduceNode(node.finallyBlock, cbNode, result);
                 break;
-            case 213 /* SwitchStatement */:
-                result = reduceNode(node.expression, f, result);
-                result = reduceNode(node.caseBlock, f, result);
+            case 226 /* VariableDeclaration */:
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNode(node.type, cbNode, result);
+                result = reduceNode(node.initializer, cbNode, result);
                 break;
-            case 214 /* LabeledStatement */:
-                result = reduceNode(node.label, f, result);
-                result = reduceNode(node.statement, f, result);
+            case 227 /* VariableDeclarationList */:
+                result = reduceNodes(node.declarations, cbNodes, result);
                 break;
-            case 216 /* TryStatement */:
-                result = reduceNode(node.tryBlock, f, result);
-                result = reduceNode(node.catchClause, f, result);
-                result = reduceNode(node.finallyBlock, f, result);
+            case 228 /* FunctionDeclaration */:
+                result = reduceNodes(node.decorators, cbNodes, result);
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNodes(node.typeParameters, cbNodes, result);
+                result = reduceNodes(node.parameters, cbNodes, result);
+                result = reduceNode(node.type, cbNode, result);
+                result = reduceNode(node.body, cbNode, result);
                 break;
-            case 218 /* VariableDeclaration */:
-                result = reduceNode(node.name, f, result);
-                result = reduceNode(node.type, f, result);
-                result = reduceNode(node.initializer, f, result);
+            case 229 /* ClassDeclaration */:
+                result = reduceNodes(node.decorators, cbNodes, result);
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNodes(node.typeParameters, cbNodes, result);
+                result = reduceNodes(node.heritageClauses, cbNodes, result);
+                result = reduceNodes(node.members, cbNodes, result);
                 break;
-            case 219 /* VariableDeclarationList */:
-                result = ts.reduceLeft(node.declarations, f, result);
+            case 232 /* EnumDeclaration */:
+                result = reduceNodes(node.decorators, cbNodes, result);
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNodes(node.members, cbNodes, result);
                 break;
-            case 220 /* FunctionDeclaration */:
-                result = ts.reduceLeft(node.decorators, f, result);
-                result = ts.reduceLeft(node.modifiers, f, result);
-                result = reduceNode(node.name, f, result);
-                result = ts.reduceLeft(node.typeParameters, f, result);
-                result = ts.reduceLeft(node.parameters, f, result);
-                result = reduceNode(node.type, f, result);
-                result = reduceNode(node.body, f, result);
+            case 233 /* ModuleDeclaration */:
+                result = reduceNodes(node.decorators, cbNodes, result);
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNode(node.body, cbNode, result);
                 break;
-            case 221 /* ClassDeclaration */:
-                result = ts.reduceLeft(node.decorators, f, result);
-                result = ts.reduceLeft(node.modifiers, f, result);
-                result = reduceNode(node.name, f, result);
-                result = ts.reduceLeft(node.typeParameters, f, result);
-                result = ts.reduceLeft(node.heritageClauses, f, result);
-                result = ts.reduceLeft(node.members, f, result);
+            case 234 /* ModuleBlock */:
+                result = reduceNodes(node.statements, cbNodes, result);
                 break;
-            case 227 /* CaseBlock */:
-                result = ts.reduceLeft(node.clauses, f, result);
+            case 235 /* CaseBlock */:
+                result = reduceNodes(node.clauses, cbNodes, result);
                 break;
-            case 230 /* ImportDeclaration */:
-                result = ts.reduceLeft(node.decorators, f, result);
-                result = ts.reduceLeft(node.modifiers, f, result);
-                result = reduceNode(node.importClause, f, result);
-                result = reduceNode(node.moduleSpecifier, f, result);
+            case 237 /* ImportEqualsDeclaration */:
+                result = reduceNodes(node.decorators, cbNodes, result);
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNode(node.moduleReference, cbNode, result);
                 break;
-            case 231 /* ImportClause */:
-                result = reduceNode(node.name, f, result);
-                result = reduceNode(node.namedBindings, f, result);
+            case 238 /* ImportDeclaration */:
+                result = reduceNodes(node.decorators, cbNodes, result);
+                result = reduceNodes(node.modifiers, cbNodes, result);
+                result = reduceNode(node.importClause, cbNode, result);
+                result = reduceNode(node.moduleSpecifier, cbNode, result);
                 break;
-            case 232 /* NamespaceImport */:
-                result = reduceNode(node.name, f, result);
+            case 239 /* ImportClause */:
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNode(node.namedBindings, cbNode, result);
                 break;
-            case 233 /* NamedImports */:
-            case 237 /* NamedExports */:
-                result = ts.reduceLeft(node.elements, f, result);
+            case 240 /* NamespaceImport */:
+                result = reduceNode(node.name, cbNode, result);
                 break;
-            case 234 /* ImportSpecifier */:
-            case 238 /* ExportSpecifier */:
-                result = reduceNode(node.propertyName, f, result);
-                result = reduceNode(node.name, f, result);
+            case 241 /* NamedImports */:
+            case 245 /* NamedExports */:
+                result = reduceNodes(node.elements, cbNodes, result);
                 break;
-            case 235 /* ExportAssignment */:
-                result = ts.reduceLeft(node.decorators, f, result);
-                result = ts.reduceLeft(node.modifiers, f, result);
-                result = reduceNode(node.expression, f, result);
+            case 242 /* ImportSpecifier */:
+            case 246 /* ExportSpecifier */:
+                result = reduceNode(node.propertyName, cbNode, result);
+                result = reduceNode(node.name, cbNode, result);
                 break;
-            case 236 /* ExportDeclaration */:
-                result = ts.reduceLeft(node.decorators, f, result);
-                result = ts.reduceLeft(node.modifiers, f, result);
-                result = reduceNode(node.exportClause, f, result);
-                result = reduceNode(node.moduleSpecifier, f, result);
+            case 243 /* ExportAssignment */:
+                result = ts.reduceLeft(node.decorators, cbNode, result);
+                result = ts.reduceLeft(node.modifiers, cbNode, result);
+                result = reduceNode(node.expression, cbNode, result);
+                break;
+            case 244 /* ExportDeclaration */:
+                result = ts.reduceLeft(node.decorators, cbNode, result);
+                result = ts.reduceLeft(node.modifiers, cbNode, result);
+                result = reduceNode(node.exportClause, cbNode, result);
+                result = reduceNode(node.moduleSpecifier, cbNode, result);
+                break;
+            // Module references
+            case 248 /* ExternalModuleReference */:
+                result = reduceNode(node.expression, cbNode, result);
                 break;
             // JSX
-            case 241 /* JsxElement */:
-                result = reduceNode(node.openingElement, f, result);
-                result = ts.reduceLeft(node.children, f, result);
-                result = reduceNode(node.closingElement, f, result);
+            case 249 /* JsxElement */:
+                result = reduceNode(node.openingElement, cbNode, result);
+                result = ts.reduceLeft(node.children, cbNode, result);
+                result = reduceNode(node.closingElement, cbNode, result);
                 break;
-            case 242 /* JsxSelfClosingElement */:
-            case 243 /* JsxOpeningElement */:
-                result = reduceNode(node.tagName, f, result);
-                result = ts.reduceLeft(node.attributes, f, result);
+            case 250 /* JsxSelfClosingElement */:
+            case 251 /* JsxOpeningElement */:
+                result = reduceNode(node.tagName, cbNode, result);
+                result = reduceNode(node.attributes, cbNode, result);
                 break;
-            case 245 /* JsxClosingElement */:
-                result = reduceNode(node.tagName, f, result);
+            case 254 /* JsxAttributes */:
+                result = reduceNodes(node.properties, cbNodes, result);
                 break;
-            case 246 /* JsxAttribute */:
-                result = reduceNode(node.name, f, result);
-                result = reduceNode(node.initializer, f, result);
+            case 252 /* JsxClosingElement */:
+                result = reduceNode(node.tagName, cbNode, result);
                 break;
-            case 247 /* JsxSpreadAttribute */:
-                result = reduceNode(node.expression, f, result);
+            case 253 /* JsxAttribute */:
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNode(node.initializer, cbNode, result);
                 break;
-            case 248 /* JsxExpression */:
-                result = reduceNode(node.expression, f, result);
+            case 255 /* JsxSpreadAttribute */:
+                result = reduceNode(node.expression, cbNode, result);
+                break;
+            case 256 /* JsxExpression */:
+                result = reduceNode(node.expression, cbNode, result);
                 break;
             // Clauses
-            case 249 /* CaseClause */:
-                result = reduceNode(node.expression, f, result);
-            // fall-through
-            case 250 /* DefaultClause */:
-                result = ts.reduceLeft(node.statements, f, result);
+            case 257 /* CaseClause */:
+                result = reduceNode(node.expression, cbNode, result);
+            // falls through
+            case 258 /* DefaultClause */:
+                result = reduceNodes(node.statements, cbNodes, result);
                 break;
-            case 251 /* HeritageClause */:
-                result = ts.reduceLeft(node.types, f, result);
+            case 259 /* HeritageClause */:
+                result = reduceNodes(node.types, cbNodes, result);
                 break;
-            case 252 /* CatchClause */:
-                result = reduceNode(node.variableDeclaration, f, result);
-                result = reduceNode(node.block, f, result);
+            case 260 /* CatchClause */:
+                result = reduceNode(node.variableDeclaration, cbNode, result);
+                result = reduceNode(node.block, cbNode, result);
                 break;
             // Property assignments
-            case 253 /* PropertyAssignment */:
-                result = reduceNode(node.name, f, result);
-                result = reduceNode(node.initializer, f, result);
+            case 261 /* PropertyAssignment */:
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNode(node.initializer, cbNode, result);
+                break;
+            case 262 /* ShorthandPropertyAssignment */:
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNode(node.objectAssignmentInitializer, cbNode, result);
                 break;
-            case 254 /* ShorthandPropertyAssignment */:
-                result = reduceNode(node.name, f, result);
-                result = reduceNode(node.objectAssignmentInitializer, f, result);
+            case 263 /* SpreadAssignment */:
+                result = reduceNode(node.expression, cbNode, result);
+                break;
+            // Enum
+            case 264 /* EnumMember */:
+                result = reduceNode(node.name, cbNode, result);
+                result = reduceNode(node.initializer, cbNode, result);
                 break;
             // Top-level nodes
-            case 256 /* SourceFile */:
-                result = ts.reduceLeft(node.statements, f, result);
+            case 265 /* SourceFile */:
+                result = reduceNodes(node.statements, cbNodes, result);
+                break;
+            // Transformation nodes
+            case 297 /* PartiallyEmittedExpression */:
+                result = reduceNode(node.expression, cbNode, result);
                 break;
-            case 288 /* PartiallyEmittedExpression */:
-                result = reduceNode(node.expression, f, result);
+            case 298 /* CommaListExpression */:
+                result = reduceNodes(node.elements, cbNodes, result);
                 break;
             default:
-                var edgeTraversalPath = nodeEdgeTraversalMap[kind];
-                if (edgeTraversalPath) {
-                    for (var _i = 0, edgeTraversalPath_1 = edgeTraversalPath; _i < edgeTraversalPath_1.length; _i++) {
-                        var edge = edgeTraversalPath_1[_i];
-                        var value = node[edge.name];
-                        if (value !== undefined) {
-                            result = ts.isArray(value)
-                                ? ts.reduceLeft(value, f, result)
-                                : f(result, value);
-                        }
-                    }
-                }
                 break;
         }
         return result;
     }
     ts.reduceEachChild = reduceEachChild;
-    function visitNode(node, visitor, test, optional, lift, parenthesize, parentNode) {
-        if (node === undefined) {
-            return undefined;
-        }
-        var visited = visitor(node);
-        if (visited === node) {
-            return node;
-        }
-        var visitedNode;
-        if (visited === undefined) {
-            if (!optional) {
-                Debug.failNotOptional();
-            }
-            return undefined;
-        }
-        else if (ts.isArray(visited)) {
-            visitedNode = (lift || extractSingleNode)(visited);
-        }
-        else {
-            visitedNode = visited;
-        }
-        if (parenthesize !== undefined) {
-            visitedNode = parenthesize(visitedNode, parentNode);
-        }
-        Debug.assertNode(visitedNode, test);
-        aggregateTransformFlags(visitedNode);
-        return visitedNode;
-    }
-    ts.visitNode = visitNode;
-    function visitNodes(nodes, visitor, test, start, count, parenthesize, parentNode) {
-        if (nodes === undefined) {
-            return undefined;
-        }
-        var updated;
-        // Ensure start and count have valid values
-        var length = nodes.length;
-        if (start === undefined || start < 0) {
-            start = 0;
-        }
-        if (count === undefined || count > length - start) {
-            count = length - start;
-        }
-        if (start > 0 || count < length) {
-            // If we are not visiting all of the original nodes, we must always create a new array.
-            // Since this is a fragment of a node array, we do not copy over the previous location
-            // and will only copy over `hasTrailingComma` if we are including the last element.
-            updated = ts.createNodeArray([], /*location*/ undefined, 
-            /*hasTrailingComma*/ nodes.hasTrailingComma && start + count === length);
-        }
-        // Visit each original node.
-        for (var i = 0; i < count; i++) {
-            var node = nodes[i + start];
-            var visited = node !== undefined ? visitor(node) : undefined;
-            if (updated !== undefined || visited === undefined || visited !== node) {
-                if (updated === undefined) {
-                    // Ensure we have a copy of `nodes`, up to the current index.
-                    updated = ts.createNodeArray(nodes.slice(0, i), /*location*/ nodes, nodes.hasTrailingComma);
-                }
-                if (visited) {
-                    if (ts.isArray(visited)) {
-                        for (var _i = 0, visited_1 = visited; _i < visited_1.length; _i++) {
-                            var visitedNode = visited_1[_i];
-                            visitedNode = parenthesize
-                                ? parenthesize(visitedNode, parentNode)
-                                : visitedNode;
-                            Debug.assertNode(visitedNode, test);
-                            aggregateTransformFlags(visitedNode);
-                            updated.push(visitedNode);
-                        }
-                    }
-                    else {
-                        var visitedNode = parenthesize
-                            ? parenthesize(visited, parentNode)
-                            : visited;
-                        Debug.assertNode(visitedNode, test);
-                        aggregateTransformFlags(visitedNode);
-                        updated.push(visitedNode);
-                    }
-                }
-            }
-        }
-        return updated || nodes;
-    }
-    ts.visitNodes = visitNodes;
-    function visitEachChild(node, visitor, context) {
-        if (node === undefined) {
-            return undefined;
-        }
-        var kind = node.kind;
-        // No need to visit nodes with no children.
-        if ((kind > 0 /* FirstToken */ && kind <= 138 /* LastToken */)) {
-            return node;
-        }
-        // We do not yet support types.
-        if ((kind >= 154 /* TypePredicate */ && kind <= 166 /* LiteralType */)) {
-            return node;
-        }
-        switch (node.kind) {
-            case 198 /* SemicolonClassElement */:
-            case 201 /* EmptyStatement */:
-            case 193 /* OmittedExpression */:
-            case 217 /* DebuggerStatement */:
-                // No need to visit nodes with no children.
-                return node;
-            // Names
-            case 140 /* ComputedPropertyName */:
-                return ts.updateComputedPropertyName(node, visitNode(node.expression, visitor, ts.isExpression));
-            // Signature elements
-            case 142 /* Parameter */:
-                return ts.updateParameterDeclaration(node, visitNodes(node.decorators, visitor, ts.isDecorator), visitNodes(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isBindingName), visitNode(node.type, visitor, ts.isTypeNode, /*optional*/ true), visitNode(node.initializer, visitor, ts.isExpression, /*optional*/ true));
-            // Type member
-            case 145 /* PropertyDeclaration */:
-                return ts.updateProperty(node, visitNodes(node.decorators, visitor, ts.isDecorator), visitNodes(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isPropertyName), visitNode(node.type, visitor, ts.isTypeNode, /*optional*/ true), visitNode(node.initializer, visitor, ts.isExpression, /*optional*/ true));
-            case 147 /* MethodDeclaration */:
-                return ts.updateMethod(node, visitNodes(node.decorators, visitor, ts.isDecorator), visitNodes(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isPropertyName), visitNodes(node.typeParameters, visitor, ts.isTypeParameter), (context.startLexicalEnvironment(), visitNodes(node.parameters, visitor, ts.isParameter)), visitNode(node.type, visitor, ts.isTypeNode, /*optional*/ true), mergeFunctionBodyLexicalEnvironment(visitNode(node.body, visitor, ts.isFunctionBody, /*optional*/ true), context.endLexicalEnvironment()));
-            case 148 /* Constructor */:
-                return ts.updateConstructor(node, visitNodes(node.decorators, visitor, ts.isDecorator), visitNodes(node.modifiers, visitor, ts.isModifier), (context.startLexicalEnvironment(), visitNodes(node.parameters, visitor, ts.isParameter)), mergeFunctionBodyLexicalEnvironment(visitNode(node.body, visitor, ts.isFunctionBody, /*optional*/ true), context.endLexicalEnvironment()));
-            case 149 /* GetAccessor */:
-                return ts.updateGetAccessor(node, visitNodes(node.decorators, visitor, ts.isDecorator), visitNodes(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isPropertyName), (context.startLexicalEnvironment(), visitNodes(node.parameters, visitor, ts.isParameter)), visitNode(node.type, visitor, ts.isTypeNode, /*optional*/ true), mergeFunctionBodyLexicalEnvironment(visitNode(node.body, visitor, ts.isFunctionBody, /*optional*/ true), context.endLexicalEnvironment()));
-            case 150 /* SetAccessor */:
-                return ts.updateSetAccessor(node, visitNodes(node.decorators, visitor, ts.isDecorator), visitNodes(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isPropertyName), (context.startLexicalEnvironment(), visitNodes(node.parameters, visitor, ts.isParameter)), mergeFunctionBodyLexicalEnvironment(visitNode(node.body, visitor, ts.isFunctionBody, /*optional*/ true), context.endLexicalEnvironment()));
-            // Binding patterns
-            case 167 /* ObjectBindingPattern */:
-                return ts.updateObjectBindingPattern(node, visitNodes(node.elements, visitor, ts.isBindingElement));
-            case 168 /* ArrayBindingPattern */:
-                return ts.updateArrayBindingPattern(node, visitNodes(node.elements, visitor, ts.isArrayBindingElement));
-            case 169 /* BindingElement */:
-                return ts.updateBindingElement(node, visitNode(node.propertyName, visitor, ts.isPropertyName, /*optional*/ true), visitNode(node.name, visitor, ts.isBindingName), visitNode(node.initializer, visitor, ts.isExpression, /*optional*/ true));
-            // Expression
-            case 170 /* ArrayLiteralExpression */:
-                return ts.updateArrayLiteral(node, visitNodes(node.elements, visitor, ts.isExpression));
-            case 171 /* ObjectLiteralExpression */:
-                return ts.updateObjectLiteral(node, visitNodes(node.properties, visitor, ts.isObjectLiteralElementLike));
-            case 172 /* PropertyAccessExpression */:
-                return ts.updatePropertyAccess(node, visitNode(node.expression, visitor, ts.isExpression), visitNode(node.name, visitor, ts.isIdentifier));
-            case 173 /* ElementAccessExpression */:
-                return ts.updateElementAccess(node, visitNode(node.expression, visitor, ts.isExpression), visitNode(node.argumentExpression, visitor, ts.isExpression));
-            case 174 /* CallExpression */:
-                return ts.updateCall(node, visitNode(node.expression, visitor, ts.isExpression), visitNodes(node.typeArguments, visitor, ts.isTypeNode), visitNodes(node.arguments, visitor, ts.isExpression));
-            case 175 /* NewExpression */:
-                return ts.updateNew(node, visitNode(node.expression, visitor, ts.isExpression), visitNodes(node.typeArguments, visitor, ts.isTypeNode), visitNodes(node.arguments, visitor, ts.isExpression));
-            case 176 /* TaggedTemplateExpression */:
-                return ts.updateTaggedTemplate(node, visitNode(node.tag, visitor, ts.isExpression), visitNode(node.template, visitor, ts.isTemplate));
-            case 178 /* ParenthesizedExpression */:
-                return ts.updateParen(node, visitNode(node.expression, visitor, ts.isExpression));
-            case 179 /* FunctionExpression */:
-                return ts.updateFunctionExpression(node, visitNode(node.name, visitor, ts.isPropertyName), visitNodes(node.typeParameters, visitor, ts.isTypeParameter), (context.startLexicalEnvironment(), visitNodes(node.parameters, visitor, ts.isParameter)), visitNode(node.type, visitor, ts.isTypeNode, /*optional*/ true), mergeFunctionBodyLexicalEnvironment(visitNode(node.body, visitor, ts.isFunctionBody, /*optional*/ true), context.endLexicalEnvironment()));
-            case 180 /* ArrowFunction */:
-                return ts.updateArrowFunction(node, visitNodes(node.modifiers, visitor, ts.isModifier), visitNodes(node.typeParameters, visitor, ts.isTypeParameter), (context.startLexicalEnvironment(), visitNodes(node.parameters, visitor, ts.isParameter)), visitNode(node.type, visitor, ts.isTypeNode, /*optional*/ true), mergeFunctionBodyLexicalEnvironment(visitNode(node.body, visitor, ts.isConciseBody, /*optional*/ true), context.endLexicalEnvironment()));
-            case 181 /* DeleteExpression */:
-                return ts.updateDelete(node, visitNode(node.expression, visitor, ts.isExpression));
-            case 182 /* TypeOfExpression */:
-                return ts.updateTypeOf(node, visitNode(node.expression, visitor, ts.isExpression));
-            case 183 /* VoidExpression */:
-                return ts.updateVoid(node, visitNode(node.expression, visitor, ts.isExpression));
-            case 184 /* AwaitExpression */:
-                return ts.updateAwait(node, visitNode(node.expression, visitor, ts.isExpression));
-            case 187 /* BinaryExpression */:
-                return ts.updateBinary(node, visitNode(node.left, visitor, ts.isExpression), visitNode(node.right, visitor, ts.isExpression));
-            case 185 /* PrefixUnaryExpression */:
-                return ts.updatePrefix(node, visitNode(node.operand, visitor, ts.isExpression));
-            case 186 /* PostfixUnaryExpression */:
-                return ts.updatePostfix(node, visitNode(node.operand, visitor, ts.isExpression));
-            case 188 /* ConditionalExpression */:
-                return ts.updateConditional(node, visitNode(node.condition, visitor, ts.isExpression), visitNode(node.whenTrue, visitor, ts.isExpression), visitNode(node.whenFalse, visitor, ts.isExpression));
-            case 189 /* TemplateExpression */:
-                return ts.updateTemplateExpression(node, visitNode(node.head, visitor, ts.isTemplateLiteralFragment), visitNodes(node.templateSpans, visitor, ts.isTemplateSpan));
-            case 190 /* YieldExpression */:
-                return ts.updateYield(node, visitNode(node.expression, visitor, ts.isExpression));
-            case 191 /* SpreadElementExpression */:
-                return ts.updateSpread(node, visitNode(node.expression, visitor, ts.isExpression));
-            case 192 /* ClassExpression */:
-                return ts.updateClassExpression(node, visitNodes(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isIdentifier, /*optional*/ true), visitNodes(node.typeParameters, visitor, ts.isTypeParameter), visitNodes(node.heritageClauses, visitor, ts.isHeritageClause), visitNodes(node.members, visitor, ts.isClassElement));
-            case 194 /* ExpressionWithTypeArguments */:
-                return ts.updateExpressionWithTypeArguments(node, visitNodes(node.typeArguments, visitor, ts.isTypeNode), visitNode(node.expression, visitor, ts.isExpression));
-            // Misc
-            case 197 /* TemplateSpan */:
-                return ts.updateTemplateSpan(node, visitNode(node.expression, visitor, ts.isExpression), visitNode(node.literal, visitor, ts.isTemplateLiteralFragment));
-            // Element
-            case 199 /* Block */:
-                return ts.updateBlock(node, visitNodes(node.statements, visitor, ts.isStatement));
-            case 200 /* VariableStatement */:
-                return ts.updateVariableStatement(node, visitNodes(node.modifiers, visitor, ts.isModifier), visitNode(node.declarationList, visitor, ts.isVariableDeclarationList));
-            case 202 /* ExpressionStatement */:
-                return ts.updateStatement(node, visitNode(node.expression, visitor, ts.isExpression));
-            case 203 /* IfStatement */:
-                return ts.updateIf(node, visitNode(node.expression, visitor, ts.isExpression), visitNode(node.thenStatement, visitor, ts.isStatement, /*optional*/ false, liftToBlock), visitNode(node.elseStatement, visitor, ts.isStatement, /*optional*/ true, liftToBlock));
-            case 204 /* DoStatement */:
-                return ts.updateDo(node, visitNode(node.statement, visitor, ts.isStatement, /*optional*/ false, liftToBlock), visitNode(node.expression, visitor, ts.isExpression));
-            case 205 /* WhileStatement */:
-                return ts.updateWhile(node, visitNode(node.expression, visitor, ts.isExpression), visitNode(node.statement, visitor, ts.isStatement, /*optional*/ false, liftToBlock));
-            case 206 /* ForStatement */:
-                return ts.updateFor(node, visitNode(node.initializer, visitor, ts.isForInitializer), visitNode(node.condition, visitor, ts.isExpression), visitNode(node.incrementor, visitor, ts.isExpression), visitNode(node.statement, visitor, ts.isStatement, /*optional*/ false, liftToBlock));
-            case 207 /* ForInStatement */:
-                return ts.updateForIn(node, visitNode(node.initializer, visitor, ts.isForInitializer), visitNode(node.expression, visitor, ts.isExpression), visitNode(node.statement, visitor, ts.isStatement, /*optional*/ false, liftToBlock));
-            case 208 /* ForOfStatement */:
-                return ts.updateForOf(node, visitNode(node.initializer, visitor, ts.isForInitializer), visitNode(node.expression, visitor, ts.isExpression), visitNode(node.statement, visitor, ts.isStatement, /*optional*/ false, liftToBlock));
-            case 209 /* ContinueStatement */:
-                return ts.updateContinue(node, visitNode(node.label, visitor, ts.isIdentifier, /*optional*/ true));
-            case 210 /* BreakStatement */:
-                return ts.updateBreak(node, visitNode(node.label, visitor, ts.isIdentifier, /*optional*/ true));
-            case 211 /* ReturnStatement */:
-                return ts.updateReturn(node, visitNode(node.expression, visitor, ts.isExpression, /*optional*/ true));
-            case 212 /* WithStatement */:
-                return ts.updateWith(node, visitNode(node.expression, visitor, ts.isExpression), visitNode(node.statement, visitor, ts.isStatement, /*optional*/ false, liftToBlock));
-            case 213 /* SwitchStatement */:
-                return ts.updateSwitch(node, visitNode(node.expression, visitor, ts.isExpression), visitNode(node.caseBlock, visitor, ts.isCaseBlock));
-            case 214 /* LabeledStatement */:
-                return ts.updateLabel(node, visitNode(node.label, visitor, ts.isIdentifier), visitNode(node.statement, visitor, ts.isStatement, /*optional*/ false, liftToBlock));
-            case 215 /* ThrowStatement */:
-                return ts.updateThrow(node, visitNode(node.expression, visitor, ts.isExpression));
-            case 216 /* TryStatement */:
-                return ts.updateTry(node, visitNode(node.tryBlock, visitor, ts.isBlock), visitNode(node.catchClause, visitor, ts.isCatchClause, /*optional*/ true), visitNode(node.finallyBlock, visitor, ts.isBlock, /*optional*/ true));
-            case 218 /* VariableDeclaration */:
-                return ts.updateVariableDeclaration(node, visitNode(node.name, visitor, ts.isBindingName), visitNode(node.type, visitor, ts.isTypeNode, /*optional*/ true), visitNode(node.initializer, visitor, ts.isExpression, /*optional*/ true));
-            case 219 /* VariableDeclarationList */:
-                return ts.updateVariableDeclarationList(node, visitNodes(node.declarations, visitor, ts.isVariableDeclaration));
-            case 220 /* FunctionDeclaration */:
-                return ts.updateFunctionDeclaration(node, visitNodes(node.decorators, visitor, ts.isDecorator), visitNodes(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isPropertyName), visitNodes(node.typeParameters, visitor, ts.isTypeParameter), (context.startLexicalEnvironment(), visitNodes(node.parameters, visitor, ts.isParameter)), visitNode(node.type, visitor, ts.isTypeNode, /*optional*/ true), mergeFunctionBodyLexicalEnvironment(visitNode(node.body, visitor, ts.isFunctionBody, /*optional*/ true), context.endLexicalEnvironment()));
-            case 221 /* ClassDeclaration */:
-                return ts.updateClassDeclaration(node, visitNodes(node.decorators, visitor, ts.isDecorator), visitNodes(node.modifiers, visitor, ts.isModifier), visitNode(node.name, visitor, ts.isIdentifier, /*optional*/ true), visitNodes(node.typeParameters, visitor, ts.isTypeParameter), visitNodes(node.heritageClauses, visitor, ts.isHeritageClause), visitNodes(node.members, visitor, ts.isClassElement));
-            case 227 /* CaseBlock */:
-                return ts.updateCaseBlock(node, visitNodes(node.clauses, visitor, ts.isCaseOrDefaultClause));
-            case 230 /* ImportDeclaration */:
-                return ts.updateImportDeclaration(node, visitNodes(node.decorators, visitor, ts.isDecorator), visitNodes(node.modifiers, visitor, ts.isModifier), visitNode(node.importClause, visitor, ts.isImportClause, /*optional*/ true), visitNode(node.moduleSpecifier, visitor, ts.isExpression));
-            case 231 /* ImportClause */:
-                return ts.updateImportClause(node, visitNode(node.name, visitor, ts.isIdentifier, /*optional*/ true), visitNode(node.namedBindings, visitor, ts.isNamedImportBindings, /*optional*/ true));
-            case 232 /* NamespaceImport */:
-                return ts.updateNamespaceImport(node, visitNode(node.name, visitor, ts.isIdentifier));
-            case 233 /* NamedImports */:
-                return ts.updateNamedImports(node, visitNodes(node.elements, visitor, ts.isImportSpecifier));
-            case 234 /* ImportSpecifier */:
-                return ts.updateImportSpecifier(node, visitNode(node.propertyName, visitor, ts.isIdentifier, /*optional*/ true), visitNode(node.name, visitor, ts.isIdentifier));
-            case 235 /* ExportAssignment */:
-                return ts.updateExportAssignment(node, visitNodes(node.decorators, visitor, ts.isDecorator), visitNodes(node.modifiers, visitor, ts.isModifier), visitNode(node.expression, visitor, ts.isExpression));
-            case 236 /* ExportDeclaration */:
-                return ts.updateExportDeclaration(node, visitNodes(node.decorators, visitor, ts.isDecorator), visitNodes(node.modifiers, visitor, ts.isModifier), visitNode(node.exportClause, visitor, ts.isNamedExports, /*optional*/ true), visitNode(node.moduleSpecifier, visitor, ts.isExpression, /*optional*/ true));
-            case 237 /* NamedExports */:
-                return ts.updateNamedExports(node, visitNodes(node.elements, visitor, ts.isExportSpecifier));
-            case 238 /* ExportSpecifier */:
-                return ts.updateExportSpecifier(node, visitNode(node.propertyName, visitor, ts.isIdentifier, /*optional*/ true), visitNode(node.name, visitor, ts.isIdentifier));
-            // JSX
-            case 241 /* JsxElement */:
-                return ts.updateJsxElement(node, visitNode(node.openingElement, visitor, ts.isJsxOpeningElement), visitNodes(node.children, visitor, ts.isJsxChild), visitNode(node.closingElement, visitor, ts.isJsxClosingElement));
-            case 242 /* JsxSelfClosingElement */:
-                return ts.updateJsxSelfClosingElement(node, visitNode(node.tagName, visitor, ts.isJsxTagNameExpression), visitNodes(node.attributes, visitor, ts.isJsxAttributeLike));
-            case 243 /* JsxOpeningElement */:
-                return ts.updateJsxOpeningElement(node, visitNode(node.tagName, visitor, ts.isJsxTagNameExpression), visitNodes(node.attributes, visitor, ts.isJsxAttributeLike));
-            case 245 /* JsxClosingElement */:
-                return ts.updateJsxClosingElement(node, visitNode(node.tagName, visitor, ts.isJsxTagNameExpression));
-            case 246 /* JsxAttribute */:
-                return ts.updateJsxAttribute(node, visitNode(node.name, visitor, ts.isIdentifier), visitNode(node.initializer, visitor, ts.isStringLiteralOrJsxExpression));
-            case 247 /* JsxSpreadAttribute */:
-                return ts.updateJsxSpreadAttribute(node, visitNode(node.expression, visitor, ts.isExpression));
-            case 248 /* JsxExpression */:
-                return ts.updateJsxExpression(node, visitNode(node.expression, visitor, ts.isExpression));
-            // Clauses
-            case 249 /* CaseClause */:
-                return ts.updateCaseClause(node, visitNode(node.expression, visitor, ts.isExpression), visitNodes(node.statements, visitor, ts.isStatement));
-            case 250 /* DefaultClause */:
-                return ts.updateDefaultClause(node, visitNodes(node.statements, visitor, ts.isStatement));
-            case 251 /* HeritageClause */:
-                return ts.updateHeritageClause(node, visitNodes(node.types, visitor, ts.isExpressionWithTypeArguments));
-            case 252 /* CatchClause */:
-                return ts.updateCatchClause(node, visitNode(node.variableDeclaration, visitor, ts.isVariableDeclaration), visitNode(node.block, visitor, ts.isBlock));
-            // Property assignments
-            case 253 /* PropertyAssignment */:
-                return ts.updatePropertyAssignment(node, visitNode(node.name, visitor, ts.isPropertyName), visitNode(node.initializer, visitor, ts.isExpression));
-            case 254 /* ShorthandPropertyAssignment */:
-                return ts.updateShorthandPropertyAssignment(node, visitNode(node.name, visitor, ts.isIdentifier), visitNode(node.objectAssignmentInitializer, visitor, ts.isExpression));
-            // Top-level nodes
-            case 256 /* SourceFile */:
-                context.startLexicalEnvironment();
-                return ts.updateSourceFileNode(node, ts.createNodeArray(ts.concatenate(visitNodes(node.statements, visitor, ts.isStatement), context.endLexicalEnvironment()), node.statements));
-            // Transformation nodes
-            case 288 /* PartiallyEmittedExpression */:
-                return ts.updatePartiallyEmittedExpression(node, visitNode(node.expression, visitor, ts.isExpression));
-            default:
-                var updated = void 0;
-                var edgeTraversalPath = nodeEdgeTraversalMap[kind];
-                if (edgeTraversalPath) {
-                    for (var _i = 0, edgeTraversalPath_2 = edgeTraversalPath; _i < edgeTraversalPath_2.length; _i++) {
-                        var edge = edgeTraversalPath_2[_i];
-                        var value = node[edge.name];
-                        if (value !== undefined) {
-                            var visited = ts.isArray(value)
-                                ? visitNodes(value, visitor, edge.test, 0, value.length, edge.parenthesize, node)
-                                : visitNode(value, visitor, edge.test, edge.optional, edge.lift, edge.parenthesize, node);
-                            if (updated !== undefined || visited !== value) {
-                                if (updated === undefined) {
-                                    updated = ts.getMutableClone(node);
-                                }
-                                if (visited !== value) {
-                                    updated[edge.name] = visited;
-                                }
-                            }
-                        }
-                    }
-                }
-                return updated ? ts.updateNode(updated, node) : node;
-        }
-        // return node;
-    }
-    ts.visitEachChild = visitEachChild;
-    function mergeFunctionBodyLexicalEnvironment(body, declarations) {
-        if (body && declarations !== undefined && declarations.length > 0) {
-            if (ts.isBlock(body)) {
-                return ts.updateBlock(body, ts.createNodeArray(ts.concatenate(body.statements, declarations), body.statements));
-            }
-            else {
-                return ts.createBlock(ts.createNodeArray([ts.createReturn(body, /*location*/ body)].concat(declarations), body), 
-                /*location*/ body, 
-                /*multiLine*/ true);
-            }
+    function mergeLexicalEnvironment(statements, declarations) {
+        if (!ts.some(declarations)) {
+            return statements;
         }
-        return body;
+        return ts.isNodeArray(statements)
+            ? ts.setTextRange(ts.createNodeArray(ts.concatenate(statements, declarations)), statements)
+            : ts.addRange(statements, declarations);
     }
-    ts.mergeFunctionBodyLexicalEnvironment = mergeFunctionBodyLexicalEnvironment;
+    ts.mergeLexicalEnvironment = mergeLexicalEnvironment;
     /**
      * Lifts a NodeArray containing only Statement nodes to a block.
      *
@@ -44755,15 +53569,6 @@ var ts;
         return ts.singleOrUndefined(nodes) || ts.createBlock(nodes);
     }
     ts.liftToBlock = liftToBlock;
-    /**
-     * Extracts the single node from a NodeArray.
-     *
-     * @param nodes The NodeArray.
-     */
-    function extractSingleNode(nodes) {
-        Debug.assert(nodes.length <= 1, "Too many nodes written to output.");
-        return ts.singleOrUndefined(nodes);
-    }
     /**
      * Aggregates the TransformFlags for a Node and its subtree.
      */
@@ -44783,13 +53588,25 @@ var ts;
         if (node === undefined) {
             return 0 /* None */;
         }
-        else if (node.transformFlags & 536870912 /* HasComputedFlags */) {
-            return node.transformFlags & ~getTransformFlagsSubtreeExclusions(node.kind);
+        if (node.transformFlags & 536870912 /* HasComputedFlags */) {
+            return node.transformFlags & ~ts.getTransformFlagsSubtreeExclusions(node.kind);
         }
-        else {
-            var subtreeFlags = aggregateTransformFlagsForSubtree(node);
-            return ts.computeTransformFlagsForNode(node, subtreeFlags);
+        var subtreeFlags = aggregateTransformFlagsForSubtree(node);
+        return ts.computeTransformFlagsForNode(node, subtreeFlags);
+    }
+    function aggregateTransformFlagsForNodeArray(nodes) {
+        if (nodes === undefined) {
+            return 0 /* None */;
         }
+        var subtreeFlags = 0 /* None */;
+        var nodeArrayFlags = 0 /* None */;
+        for (var _i = 0, nodes_5 = nodes; _i < nodes_5.length; _i++) {
+            var node = nodes_5[_i];
+            subtreeFlags |= aggregateTransformFlagsForNode(node);
+            nodeArrayFlags |= node.transformFlags & ~536870912 /* HasComputedFlags */;
+        }
+        nodes.transformFlags = nodeArrayFlags | 536870912 /* HasComputedFlags */;
+        return subtreeFlags;
     }
     /**
      * Aggregates the transform flags for the subtree of a node.
@@ -44797,437 +53614,604 @@ var ts;
     function aggregateTransformFlagsForSubtree(node) {
         // We do not transform ambient declarations or types, so there is no need to
         // recursively aggregate transform flags.
-        if (ts.hasModifier(node, 2 /* Ambient */) || ts.isTypeNode(node)) {
+        if (ts.hasModifier(node, 2 /* Ambient */) || (ts.isTypeNode(node) && node.kind !== 201 /* ExpressionWithTypeArguments */)) {
             return 0 /* None */;
         }
         // Aggregate the transform flags of each child.
-        return reduceEachChild(node, aggregateTransformFlagsForChildNode, 0 /* None */);
+        return reduceEachChild(node, 0 /* None */, aggregateTransformFlagsForChildNode, aggregateTransformFlagsForChildNodes);
     }
     /**
      * Aggregates the TransformFlags of a child node with the TransformFlags of its
      * siblings.
      */
-    function aggregateTransformFlagsForChildNode(transformFlags, child) {
-        return transformFlags | aggregateTransformFlagsForNode(child);
+    function aggregateTransformFlagsForChildNode(transformFlags, node) {
+        return transformFlags | aggregateTransformFlagsForNode(node);
     }
-    /**
-     * Gets the transform flags to exclude when unioning the transform flags of a subtree.
-     *
-     * NOTE: This needs to be kept up-to-date with the exclusions used in `computeTransformFlagsForNode`.
-     *       For performance reasons, `computeTransformFlagsForNode` uses local constant values rather
-     *       than calling this function.
-     */
-    function getTransformFlagsSubtreeExclusions(kind) {
-        if (kind >= 154 /* FirstTypeNode */ && kind <= 166 /* LastTypeNode */) {
-            return -3 /* TypeExcludes */;
-        }
-        switch (kind) {
-            case 174 /* CallExpression */:
-            case 175 /* NewExpression */:
-            case 170 /* ArrayLiteralExpression */:
-                return 537133909 /* ArrayLiteralOrCallOrNewExcludes */;
-            case 225 /* ModuleDeclaration */:
-                return 546335573 /* ModuleExcludes */;
-            case 142 /* Parameter */:
-                return 538968917 /* ParameterExcludes */;
-            case 180 /* ArrowFunction */:
-                return 550710101 /* ArrowFunctionExcludes */;
-            case 179 /* FunctionExpression */:
-            case 220 /* FunctionDeclaration */:
-                return 550726485 /* FunctionExcludes */;
-            case 219 /* VariableDeclarationList */:
-                return 538968917 /* VariableDeclarationListExcludes */;
-            case 221 /* ClassDeclaration */:
-            case 192 /* ClassExpression */:
-                return 537590613 /* ClassExcludes */;
-            case 148 /* Constructor */:
-                return 550593365 /* ConstructorExcludes */;
-            case 147 /* MethodDeclaration */:
-            case 149 /* GetAccessor */:
-            case 150 /* SetAccessor */:
-                return 550593365 /* MethodOrAccessorExcludes */;
-            case 117 /* AnyKeyword */:
-            case 130 /* NumberKeyword */:
-            case 127 /* NeverKeyword */:
-            case 132 /* StringKeyword */:
-            case 120 /* BooleanKeyword */:
-            case 133 /* SymbolKeyword */:
-            case 103 /* VoidKeyword */:
-            case 141 /* TypeParameter */:
-            case 144 /* PropertySignature */:
-            case 146 /* MethodSignature */:
-            case 151 /* CallSignature */:
-            case 152 /* ConstructSignature */:
-            case 153 /* IndexSignature */:
-            case 222 /* InterfaceDeclaration */:
-            case 223 /* TypeAliasDeclaration */:
-                return -3 /* TypeExcludes */;
-            case 171 /* ObjectLiteralExpression */:
-                return 537430869 /* ObjectLiteralExcludes */;
-            default:
-                return 536871765 /* NodeExcludes */;
-        }
+    function aggregateTransformFlagsForChildNodes(transformFlags, nodes) {
+        return transformFlags | aggregateTransformFlagsForNodeArray(nodes);
     }
     var Debug;
     (function (Debug) {
-        Debug.failNotOptional = Debug.shouldAssert(1 /* Normal */)
-            ? function (message) { return Debug.assert(false, message || "Node not optional."); }
-            : function (message) { };
+        var isDebugInfoEnabled = false;
         Debug.failBadSyntaxKind = Debug.shouldAssert(1 /* Normal */)
-            ? function (node, message) { return Debug.assert(false, message || "Unexpected node.", function () { return "Node " + ts.formatSyntaxKind(node.kind) + " was unexpected."; }); }
-            : function (node, message) { };
+            ? function (node, message) { return Debug.fail((message || "Unexpected node.") + "\r\nNode " + ts.formatSyntaxKind(node.kind) + " was unexpected.", Debug.failBadSyntaxKind); }
+            : ts.noop;
+        Debug.assertEachNode = Debug.shouldAssert(1 /* Normal */)
+            ? function (nodes, test, message) { return Debug.assert(test === undefined || ts.every(nodes, test), message || "Unexpected node.", function () { return "Node array did not pass test '" + Debug.getFunctionName(test) + "'."; }, Debug.assertEachNode); }
+            : ts.noop;
         Debug.assertNode = Debug.shouldAssert(1 /* Normal */)
-            ? function (node, test, message) { return Debug.assert(test === undefined || test(node), message || "Unexpected node.", function () { return "Node " + ts.formatSyntaxKind(node.kind) + " did not pass test '" + getFunctionName(test) + "'."; }); }
-            : function (node, test, message) { };
-        function getFunctionName(func) {
-            if (typeof func !== "function") {
-                return "";
+            ? function (node, test, message) { return Debug.assert(test === undefined || test(node), message || "Unexpected node.", function () { return "Node " + ts.formatSyntaxKind(node.kind) + " did not pass test '" + Debug.getFunctionName(test) + "'."; }, Debug.assertNode); }
+            : ts.noop;
+        Debug.assertOptionalNode = Debug.shouldAssert(1 /* Normal */)
+            ? function (node, test, message) { return Debug.assert(test === undefined || node === undefined || test(node), message || "Unexpected node.", function () { return "Node " + ts.formatSyntaxKind(node.kind) + " did not pass test '" + Debug.getFunctionName(test) + "'."; }, Debug.assertOptionalNode); }
+            : ts.noop;
+        Debug.assertOptionalToken = Debug.shouldAssert(1 /* Normal */)
+            ? function (node, kind, message) { return Debug.assert(kind === undefined || node === undefined || node.kind === kind, message || "Unexpected node.", function () { return "Node " + ts.formatSyntaxKind(node.kind) + " was not a '" + ts.formatSyntaxKind(kind) + "' token."; }, Debug.assertOptionalToken); }
+            : ts.noop;
+        Debug.assertMissingNode = Debug.shouldAssert(1 /* Normal */)
+            ? function (node, message) { return Debug.assert(node === undefined, message || "Unexpected node.", function () { return "Node " + ts.formatSyntaxKind(node.kind) + " was unexpected'."; }, Debug.assertMissingNode); }
+            : ts.noop;
+        /**
+         * Injects debug information into frequently used types.
+         */
+        function enableDebugInfo() {
+            if (isDebugInfoEnabled)
+                return;
+            // Add additional properties in debug mode to assist with debugging.
+            Object.defineProperties(ts.objectAllocator.getSymbolConstructor().prototype, {
+                "__debugFlags": { get: function () { return ts.formatSymbolFlags(this.flags); } }
+            });
+            Object.defineProperties(ts.objectAllocator.getTypeConstructor().prototype, {
+                "__debugFlags": { get: function () { return ts.formatTypeFlags(this.flags); } },
+                "__debugObjectFlags": { get: function () { return this.flags & 32768 /* Object */ ? ts.formatObjectFlags(this.objectFlags) : ""; } },
+                "__debugTypeToString": { value: function () { return this.checker.typeToString(this); } },
+            });
+            var nodeConstructors = [
+                ts.objectAllocator.getNodeConstructor(),
+                ts.objectAllocator.getIdentifierConstructor(),
+                ts.objectAllocator.getTokenConstructor(),
+                ts.objectAllocator.getSourceFileConstructor()
+            ];
+            for (var _i = 0, nodeConstructors_1 = nodeConstructors; _i < nodeConstructors_1.length; _i++) {
+                var ctor = nodeConstructors_1[_i];
+                if (!ctor.prototype.hasOwnProperty("__debugKind")) {
+                    Object.defineProperties(ctor.prototype, {
+                        "__debugKind": { get: function () { return ts.formatSyntaxKind(this.kind); } },
+                        "__debugModifierFlags": { get: function () { return ts.formatModifierFlags(ts.getModifierFlagsNoCache(this)); } },
+                        "__debugTransformFlags": { get: function () { return ts.formatTransformFlags(this.transformFlags); } },
+                        "__debugEmitFlags": { get: function () { return ts.formatEmitFlags(ts.getEmitFlags(this)); } },
+                        "__debugGetText": {
+                            value: function (includeTrivia) {
+                                if (ts.nodeIsSynthesized(this))
+                                    return "";
+                                var parseNode = ts.getParseTreeNode(this);
+                                var sourceFile = parseNode && ts.getSourceFileOfNode(parseNode);
+                                return sourceFile ? ts.getSourceTextOfNodeFromSourceFile(sourceFile, parseNode, includeTrivia) : "";
+                            }
+                        }
+                    });
+                }
             }
-            else if (func.hasOwnProperty("name")) {
-                return func.name;
+            isDebugInfoEnabled = true;
+        }
+        Debug.enableDebugInfo = enableDebugInfo;
+    })(Debug = ts.Debug || (ts.Debug = {}));
+})(ts || (ts = {}));
+/* @internal */
+var ts;
+(function (ts) {
+    function getOriginalNodeId(node) {
+        node = ts.getOriginalNode(node);
+        return node ? ts.getNodeId(node) : 0;
+    }
+    ts.getOriginalNodeId = getOriginalNodeId;
+    function collectExternalModuleInfo(sourceFile, resolver, compilerOptions) {
+        var externalImports = [];
+        var exportSpecifiers = ts.createMultiMap();
+        var exportedBindings = [];
+        var uniqueExports = ts.createMap();
+        var exportedNames;
+        var hasExportDefault = false;
+        var exportEquals = undefined;
+        var hasExportStarsToExportValues = false;
+        for (var _i = 0, _a = sourceFile.statements; _i < _a.length; _i++) {
+            var node = _a[_i];
+            switch (node.kind) {
+                case 238 /* ImportDeclaration */:
+                    // import "mod"
+                    // import x from "mod"
+                    // import * as x from "mod"
+                    // import { x, y } from "mod"
+                    externalImports.push(node);
+                    break;
+                case 237 /* ImportEqualsDeclaration */:
+                    if (node.moduleReference.kind === 248 /* ExternalModuleReference */) {
+                        // import x = require("mod")
+                        externalImports.push(node);
+                    }
+                    break;
+                case 244 /* ExportDeclaration */:
+                    if (node.moduleSpecifier) {
+                        if (!node.exportClause) {
+                            // export * from "mod"
+                            externalImports.push(node);
+                            hasExportStarsToExportValues = true;
+                        }
+                        else {
+                            // export { x, y } from "mod"
+                            externalImports.push(node);
+                        }
+                    }
+                    else {
+                        // export { x, y }
+                        for (var _b = 0, _c = node.exportClause.elements; _b < _c.length; _b++) {
+                            var specifier = _c[_b];
+                            if (!uniqueExports.get(specifier.name.text)) {
+                                var name_42 = specifier.propertyName || specifier.name;
+                                exportSpecifiers.add(name_42.text, specifier);
+                                var decl = resolver.getReferencedImportDeclaration(name_42)
+                                    || resolver.getReferencedValueDeclaration(name_42);
+                                if (decl) {
+                                    multiMapSparseArrayAdd(exportedBindings, getOriginalNodeId(decl), specifier.name);
+                                }
+                                uniqueExports.set(specifier.name.text, true);
+                                exportedNames = ts.append(exportedNames, specifier.name);
+                            }
+                        }
+                    }
+                    break;
+                case 243 /* ExportAssignment */:
+                    if (node.isExportEquals && !exportEquals) {
+                        // export = x
+                        exportEquals = node;
+                    }
+                    break;
+                case 208 /* VariableStatement */:
+                    if (ts.hasModifier(node, 1 /* Export */)) {
+                        for (var _d = 0, _e = node.declarationList.declarations; _d < _e.length; _d++) {
+                            var decl = _e[_d];
+                            exportedNames = collectExportedVariableInfo(decl, uniqueExports, exportedNames);
+                        }
+                    }
+                    break;
+                case 228 /* FunctionDeclaration */:
+                    if (ts.hasModifier(node, 1 /* Export */)) {
+                        if (ts.hasModifier(node, 512 /* Default */)) {
+                            // export default function() { }
+                            if (!hasExportDefault) {
+                                multiMapSparseArrayAdd(exportedBindings, getOriginalNodeId(node), ts.getDeclarationName(node));
+                                hasExportDefault = true;
+                            }
+                        }
+                        else {
+                            // export function x() { }
+                            var name_43 = node.name;
+                            if (!uniqueExports.get(name_43.text)) {
+                                multiMapSparseArrayAdd(exportedBindings, getOriginalNodeId(node), name_43);
+                                uniqueExports.set(name_43.text, true);
+                                exportedNames = ts.append(exportedNames, name_43);
+                            }
+                        }
+                    }
+                    break;
+                case 229 /* ClassDeclaration */:
+                    if (ts.hasModifier(node, 1 /* Export */)) {
+                        if (ts.hasModifier(node, 512 /* Default */)) {
+                            // export default class { }
+                            if (!hasExportDefault) {
+                                multiMapSparseArrayAdd(exportedBindings, getOriginalNodeId(node), ts.getDeclarationName(node));
+                                hasExportDefault = true;
+                            }
+                        }
+                        else {
+                            // export class x { }
+                            var name_44 = node.name;
+                            if (!uniqueExports.get(name_44.text)) {
+                                multiMapSparseArrayAdd(exportedBindings, getOriginalNodeId(node), name_44);
+                                uniqueExports.set(name_44.text, true);
+                                exportedNames = ts.append(exportedNames, name_44);
+                            }
+                        }
+                    }
+                    break;
             }
-            else {
-                var text = Function.prototype.toString.call(func);
-                var match = /^function\s+([\w\$]+)\s*\(/.exec(text);
-                return match ? match[1] : "";
+        }
+        var externalHelpersModuleName = ts.getOrCreateExternalHelpersModuleNameIfNeeded(sourceFile, compilerOptions, hasExportStarsToExportValues);
+        var externalHelpersImportDeclaration = externalHelpersModuleName && ts.createImportDeclaration(
+        /*decorators*/ undefined, 
+        /*modifiers*/ undefined, ts.createImportClause(/*name*/ undefined, ts.createNamespaceImport(externalHelpersModuleName)), ts.createLiteral(ts.externalHelpersModuleNameText));
+        if (externalHelpersImportDeclaration) {
+            externalImports.unshift(externalHelpersImportDeclaration);
+        }
+        return { externalImports: externalImports, exportSpecifiers: exportSpecifiers, exportEquals: exportEquals, hasExportStarsToExportValues: hasExportStarsToExportValues, exportedBindings: exportedBindings, exportedNames: exportedNames, externalHelpersImportDeclaration: externalHelpersImportDeclaration };
+    }
+    ts.collectExternalModuleInfo = collectExternalModuleInfo;
+    function collectExportedVariableInfo(decl, uniqueExports, exportedNames) {
+        if (ts.isBindingPattern(decl.name)) {
+            for (var _i = 0, _a = decl.name.elements; _i < _a.length; _i++) {
+                var element = _a[_i];
+                if (!ts.isOmittedExpression(element)) {
+                    exportedNames = collectExportedVariableInfo(element, uniqueExports, exportedNames);
+                }
             }
         }
-    })(Debug = ts.Debug || (ts.Debug = {}));
-    var _a;
+        else if (!ts.isGeneratedIdentifier(decl.name)) {
+            if (!uniqueExports.get(decl.name.text)) {
+                uniqueExports.set(decl.name.text, true);
+                exportedNames = ts.append(exportedNames, decl.name);
+            }
+        }
+        return exportedNames;
+    }
+    /** Use a sparse array as a multi-map. */
+    function multiMapSparseArrayAdd(map, key, value) {
+        var values = map[key];
+        if (values) {
+            values.push(value);
+        }
+        else {
+            map[key] = values = [value];
+        }
+        return values;
+    }
 })(ts || (ts = {}));
 /// <reference path="../factory.ts" />
 /// <reference path="../visitor.ts" />
 /*@internal*/
 var ts;
 (function (ts) {
+    var FlattenLevel;
+    (function (FlattenLevel) {
+        FlattenLevel[FlattenLevel["All"] = 0] = "All";
+        FlattenLevel[FlattenLevel["ObjectRest"] = 1] = "ObjectRest";
+    })(FlattenLevel = ts.FlattenLevel || (ts.FlattenLevel = {}));
     /**
-     * Flattens a destructuring assignment expression.
+     * Flattens a DestructuringAssignment or a VariableDeclaration to an expression.
      *
-     * @param root The destructuring assignment expression.
-     * @param needsValue Indicates whether the value from the right-hand-side of the
-     *                   destructuring assignment is needed as part of a larger expression.
-     * @param recordTempVariable A callback used to record new temporary variables.
-     * @param visitor An optional visitor to use to visit expressions.
+     * @param node The node to flatten.
+     * @param visitor An optional visitor used to visit initializers.
+     * @param context The transformation context.
+     * @param level Indicates the extent to which flattening should occur.
+     * @param needsValue An optional value indicating whether the value from the right-hand-side of
+     * the destructuring assignment is needed as part of a larger expression.
+     * @param createAssignmentCallback An optional callback used to create the assignment expression.
      */
-    function flattenDestructuringAssignment(context, node, needsValue, recordTempVariable, visitor) {
-        if (ts.isEmptyObjectLiteralOrArrayLiteral(node.left)) {
-            var right = node.right;
-            if (ts.isDestructuringAssignment(right)) {
-                return flattenDestructuringAssignment(context, right, needsValue, recordTempVariable, visitor);
+    function flattenDestructuringAssignment(node, visitor, context, level, needsValue, createAssignmentCallback) {
+        var location = node;
+        var value;
+        if (ts.isDestructuringAssignment(node)) {
+            value = node.right;
+            while (ts.isEmptyArrayLiteral(node.left) || ts.isEmptyObjectLiteral(node.left)) {
+                if (ts.isDestructuringAssignment(value)) {
+                    location = node = value;
+                    value = node.right;
+                }
+                else {
+                    return value;
+                }
+            }
+        }
+        var expressions;
+        var flattenContext = {
+            context: context,
+            level: level,
+            downlevelIteration: context.getCompilerOptions().downlevelIteration,
+            hoistTempVariables: true,
+            emitExpression: emitExpression,
+            emitBindingOrAssignment: emitBindingOrAssignment,
+            createArrayBindingOrAssignmentPattern: makeArrayAssignmentPattern,
+            createObjectBindingOrAssignmentPattern: makeObjectAssignmentPattern,
+            createArrayBindingOrAssignmentElement: makeAssignmentElement,
+            visitor: visitor
+        };
+        if (value) {
+            value = ts.visitNode(value, visitor, ts.isExpression);
+            if (needsValue) {
+                // If the right-hand value of the destructuring assignment needs to be preserved (as
+                // is the case when the destructuring assignment is part of a larger expression),
+                // then we need to cache the right-hand value.
+                //
+                // The source map location for the assignment should point to the entire binary
+                // expression.
+                value = ensureIdentifier(flattenContext, value, /*reuseIdentifierExpressions*/ true, location);
             }
-            else {
-                return node.right;
+            else if (ts.nodeIsSynthesized(node)) {
+                // Generally, the source map location for a destructuring assignment is the root
+                // expression.
+                //
+                // However, if the root expression is synthesized (as in the case
+                // of the initializer when transforming a ForOfStatement), then the source map
+                // location should point to the right-hand value of the expression.
+                location = value;
             }
         }
-        var location = node;
-        var value = node.right;
-        var expressions = [];
-        if (needsValue) {
-            // If the right-hand value of the destructuring assignment needs to be preserved (as
-            // is the case when the destructuring assignmen) is part of a larger expression),
-            // then we need to cache the right-hand value.
-            //
-            // The source map location for the assignment should point to the entire binary
-            // expression.
-            value = ensureIdentifier(value, /*reuseIdentifierExpressions*/ true, location, emitTempVariableAssignment, visitor);
-        }
-        else if (ts.nodeIsSynthesized(node)) {
-            // Generally, the source map location for a destructuring assignment is the root
-            // expression.
-            //
-            // However, if the root expression is synthesized (as in the case
-            // of the initializer when transforming a ForOfStatement), then the source map
-            // location should point to the right-hand value of the expression.
-            location = value;
-        }
-        flattenDestructuring(context, node, value, location, emitAssignment, emitTempVariableAssignment, visitor);
-        if (needsValue) {
+        flattenBindingOrAssignmentElement(flattenContext, node, value, location, /*skipInitializer*/ ts.isDestructuringAssignment(node));
+        if (value && needsValue) {
+            if (!ts.some(expressions)) {
+                return value;
+            }
             expressions.push(value);
         }
-        var expression = ts.inlineExpressions(expressions);
-        ts.aggregateTransformFlags(expression);
-        return expression;
-        function emitAssignment(name, value, location) {
-            var expression = ts.createAssignment(name, value, location);
+        return ts.aggregateTransformFlags(ts.inlineExpressions(expressions)) || ts.createOmittedExpression();
+        function emitExpression(expression) {
             // NOTE: this completely disables source maps, but aligns with the behavior of
             //       `emitAssignment` in the old emitter.
-            ts.setEmitFlags(expression, 2048 /* NoNestedSourceMaps */);
+            ts.setEmitFlags(expression, 64 /* NoNestedSourceMaps */);
             ts.aggregateTransformFlags(expression);
-            expressions.push(expression);
+            expressions = ts.append(expressions, expression);
         }
-        function emitTempVariableAssignment(value, location) {
-            var name = ts.createTempVariable(recordTempVariable);
-            emitAssignment(name, value, location);
-            return name;
+        function emitBindingOrAssignment(target, value, location, original) {
+            ts.Debug.assertNode(target, createAssignmentCallback ? ts.isIdentifier : ts.isExpression);
+            var expression = createAssignmentCallback
+                ? createAssignmentCallback(target, value, location)
+                : ts.setTextRange(ts.createAssignment(ts.visitNode(target, visitor, ts.isExpression), value), location);
+            expression.original = original;
+            emitExpression(expression);
         }
     }
     ts.flattenDestructuringAssignment = flattenDestructuringAssignment;
     /**
-     * Flattens binding patterns in a parameter declaration.
+     * Flattens a VariableDeclaration or ParameterDeclaration to one or more variable declarations.
      *
-     * @param node The ParameterDeclaration to flatten.
-     * @param value The rhs value for the binding pattern.
-     * @param visitor An optional visitor to use to visit expressions.
+     * @param node The node to flatten.
+     * @param visitor An optional visitor used to visit initializers.
+     * @param context The transformation context.
+     * @param boundValue The value bound to the declaration.
+     * @param skipInitializer A value indicating whether to ignore the initializer of `node`.
+     * @param hoistTempVariables Indicates whether temporary variables should not be recorded in-line.
+     * @param level Indicates the extent to which flattening should occur.
      */
-    function flattenParameterDestructuring(context, node, value, visitor) {
+    function flattenDestructuringBinding(node, visitor, context, level, rval, hoistTempVariables, skipInitializer) {
+        var pendingExpressions;
+        var pendingDeclarations = [];
         var declarations = [];
-        flattenDestructuring(context, node, value, node, emitAssignment, emitTempVariableAssignment, visitor);
-        return declarations;
-        function emitAssignment(name, value, location) {
-            var declaration = ts.createVariableDeclaration(name, /*type*/ undefined, value, location);
-            // NOTE: this completely disables source maps, but aligns with the behavior of
-            //       `emitAssignment` in the old emitter.
-            ts.setEmitFlags(declaration, 2048 /* NoNestedSourceMaps */);
-            ts.aggregateTransformFlags(declaration);
-            declarations.push(declaration);
+        var flattenContext = {
+            context: context,
+            level: level,
+            downlevelIteration: context.getCompilerOptions().downlevelIteration,
+            hoistTempVariables: hoistTempVariables,
+            emitExpression: emitExpression,
+            emitBindingOrAssignment: emitBindingOrAssignment,
+            createArrayBindingOrAssignmentPattern: makeArrayBindingPattern,
+            createObjectBindingOrAssignmentPattern: makeObjectBindingPattern,
+            createArrayBindingOrAssignmentElement: makeBindingElement,
+            visitor: visitor
+        };
+        flattenBindingOrAssignmentElement(flattenContext, node, rval, node, skipInitializer);
+        if (pendingExpressions) {
+            var temp = ts.createTempVariable(/*recordTempVariable*/ undefined);
+            if (hoistTempVariables) {
+                var value = ts.inlineExpressions(pendingExpressions);
+                pendingExpressions = undefined;
+                emitBindingOrAssignment(temp, value, /*location*/ undefined, /*original*/ undefined);
+            }
+            else {
+                context.hoistVariableDeclaration(temp);
+                var pendingDeclaration = ts.lastOrUndefined(pendingDeclarations);
+                pendingDeclaration.pendingExpressions = ts.append(pendingDeclaration.pendingExpressions, ts.createAssignment(temp, pendingDeclaration.value));
+                ts.addRange(pendingDeclaration.pendingExpressions, pendingExpressions);
+                pendingDeclaration.value = temp;
+            }
         }
-        function emitTempVariableAssignment(value, location) {
-            var name = ts.createTempVariable(/*recordTempVariable*/ undefined);
-            emitAssignment(name, value, location);
-            return name;
+        for (var _i = 0, pendingDeclarations_1 = pendingDeclarations; _i < pendingDeclarations_1.length; _i++) {
+            var _a = pendingDeclarations_1[_i], pendingExpressions_1 = _a.pendingExpressions, name_45 = _a.name, value = _a.value, location_2 = _a.location, original = _a.original;
+            var variable = ts.createVariableDeclaration(name_45, 
+            /*type*/ undefined, pendingExpressions_1 ? ts.inlineExpressions(ts.append(pendingExpressions_1, value)) : value);
+            variable.original = original;
+            ts.setTextRange(variable, location_2);
+            if (ts.isIdentifier(name_45)) {
+                ts.setEmitFlags(variable, 64 /* NoNestedSourceMaps */);
+            }
+            ts.aggregateTransformFlags(variable);
+            declarations.push(variable);
         }
-    }
-    ts.flattenParameterDestructuring = flattenParameterDestructuring;
-    /**
-     * Flattens binding patterns in a variable declaration.
-     *
-     * @param node The VariableDeclaration to flatten.
-     * @param value An optional rhs value for the binding pattern.
-     * @param visitor An optional visitor to use to visit expressions.
-     */
-    function flattenVariableDestructuring(context, node, value, visitor, recordTempVariable) {
-        var declarations = [];
-        var pendingAssignments;
-        flattenDestructuring(context, node, value, node, emitAssignment, emitTempVariableAssignment, visitor);
         return declarations;
-        function emitAssignment(name, value, location, original) {
-            if (pendingAssignments) {
-                pendingAssignments.push(value);
-                value = ts.inlineExpressions(pendingAssignments);
-                pendingAssignments = undefined;
-            }
-            var declaration = ts.createVariableDeclaration(name, /*type*/ undefined, value, location);
-            declaration.original = original;
-            // NOTE: this completely disables source maps, but aligns with the behavior of
-            //       `emitAssignment` in the old emitter.
-            ts.setEmitFlags(declaration, 2048 /* NoNestedSourceMaps */);
-            declarations.push(declaration);
-            ts.aggregateTransformFlags(declaration);
+        function emitExpression(value) {
+            pendingExpressions = ts.append(pendingExpressions, value);
         }
-        function emitTempVariableAssignment(value, location) {
-            var name = ts.createTempVariable(recordTempVariable);
-            if (recordTempVariable) {
-                var assignment = ts.createAssignment(name, value, location);
-                if (pendingAssignments) {
-                    pendingAssignments.push(assignment);
-                }
-                else {
-                    pendingAssignments = [assignment];
-                }
-            }
-            else {
-                emitAssignment(name, value, location, /*original*/ undefined);
+        function emitBindingOrAssignment(target, value, location, original) {
+            ts.Debug.assertNode(target, ts.isBindingName);
+            if (pendingExpressions) {
+                value = ts.inlineExpressions(ts.append(pendingExpressions, value));
+                pendingExpressions = undefined;
             }
-            return name;
+            pendingDeclarations.push({ pendingExpressions: pendingExpressions, name: target, value: value, location: location, original: original });
         }
     }
-    ts.flattenVariableDestructuring = flattenVariableDestructuring;
+    ts.flattenDestructuringBinding = flattenDestructuringBinding;
     /**
-     * Flattens binding patterns in a variable declaration and transforms them into an expression.
+     * Flattens a BindingOrAssignmentElement into zero or more bindings or assignments.
      *
-     * @param node The VariableDeclaration to flatten.
-     * @param recordTempVariable A callback used to record new temporary variables.
-     * @param nameSubstitution An optional callback used to substitute binding names.
-     * @param visitor An optional visitor to use to visit expressions.
+     * @param flattenContext Options used to control flattening.
+     * @param element The element to flatten.
+     * @param value The current RHS value to assign to the element.
+     * @param location The location to use for source maps and comments.
+     * @param skipInitializer An optional value indicating whether to include the initializer
+     * for the element.
      */
-    function flattenVariableDestructuringToExpression(context, node, recordTempVariable, nameSubstitution, visitor) {
-        var pendingAssignments = [];
-        flattenDestructuring(context, node, /*value*/ undefined, node, emitAssignment, emitTempVariableAssignment, visitor);
-        var expression = ts.inlineExpressions(pendingAssignments);
-        ts.aggregateTransformFlags(expression);
-        return expression;
-        function emitAssignment(name, value, location, original) {
-            var left = nameSubstitution && nameSubstitution(name) || name;
-            emitPendingAssignment(left, value, location, original);
-        }
-        function emitTempVariableAssignment(value, location) {
-            var name = ts.createTempVariable(recordTempVariable);
-            emitPendingAssignment(name, value, location, /*original*/ undefined);
-            return name;
-        }
-        function emitPendingAssignment(name, value, location, original) {
-            var expression = ts.createAssignment(name, value, location);
-            expression.original = original;
-            // NOTE: this completely disables source maps, but aligns with the behavior of
-            //       `emitAssignment` in the old emitter.
-            ts.setEmitFlags(expression, 2048 /* NoNestedSourceMaps */);
-            pendingAssignments.push(expression);
-            return expression;
-        }
-    }
-    ts.flattenVariableDestructuringToExpression = flattenVariableDestructuringToExpression;
-    function flattenDestructuring(context, root, value, location, emitAssignment, emitTempVariableAssignment, visitor) {
-        if (value && visitor) {
-            value = ts.visitNode(value, visitor, ts.isExpression);
-        }
-        if (ts.isBinaryExpression(root)) {
-            emitDestructuringAssignment(root.left, value, location);
-        }
-        else {
-            emitBindingElement(root, value);
-        }
-        function emitDestructuringAssignment(bindingTarget, value, location) {
-            // When emitting target = value use source map node to highlight, including any temporary assignments needed for this
-            var target;
-            if (ts.isShorthandPropertyAssignment(bindingTarget)) {
-                var initializer = visitor
-                    ? ts.visitNode(bindingTarget.objectAssignmentInitializer, visitor, ts.isExpression)
-                    : bindingTarget.objectAssignmentInitializer;
-                if (initializer) {
-                    value = createDefaultValueCheck(value, initializer, location);
-                }
-                target = bindingTarget.name;
-            }
-            else if (ts.isBinaryExpression(bindingTarget) && bindingTarget.operatorToken.kind === 56 /* EqualsToken */) {
-                var initializer = visitor
-                    ? ts.visitNode(bindingTarget.right, visitor, ts.isExpression)
-                    : bindingTarget.right;
-                value = createDefaultValueCheck(value, initializer, location);
-                target = bindingTarget.left;
-            }
-            else {
-                target = bindingTarget;
-            }
-            if (target.kind === 171 /* ObjectLiteralExpression */) {
-                emitObjectLiteralAssignment(target, value, location);
-            }
-            else if (target.kind === 170 /* ArrayLiteralExpression */) {
-                emitArrayLiteralAssignment(target, value, location);
-            }
-            else {
-                var name_29 = ts.getMutableClone(target);
-                ts.setSourceMapRange(name_29, target);
-                ts.setCommentRange(name_29, target);
-                emitAssignment(name_29, value, location, /*original*/ undefined);
-            }
-        }
-        function emitObjectLiteralAssignment(target, value, location) {
-            var properties = target.properties;
-            if (properties.length !== 1) {
-                // For anything but a single element destructuring we need to generate a temporary
-                // to ensure value is evaluated exactly once.
-                // When doing so we want to hightlight the passed in source map node since thats the one needing this temp assignment
-                value = ensureIdentifier(value, /*reuseIdentifierExpressions*/ true, location, emitTempVariableAssignment);
-            }
-            for (var _i = 0, properties_6 = properties; _i < properties_6.length; _i++) {
-                var p = properties_6[_i];
-                if (p.kind === 253 /* PropertyAssignment */ || p.kind === 254 /* ShorthandPropertyAssignment */) {
-                    var propName = p.name;
-                    var target_1 = p.kind === 254 /* ShorthandPropertyAssignment */ ? p : p.initializer || propName;
-                    // Assignment for target = value.propName should highligh whole property, hence use p as source map node
-                    emitDestructuringAssignment(target_1, createDestructuringPropertyAccess(value, propName), p);
-                }
-            }
-        }
-        function emitArrayLiteralAssignment(target, value, location) {
-            var elements = target.elements;
-            var numElements = elements.length;
-            if (numElements !== 1) {
-                // For anything but a single element destructuring we need to generate a temporary
-                // to ensure value is evaluated exactly once.
-                // When doing so we want to hightlight the passed in source map node since thats the one needing this temp assignment
-                value = ensureIdentifier(value, /*reuseIdentifierExpressions*/ true, location, emitTempVariableAssignment);
-            }
-            for (var i = 0; i < numElements; i++) {
-                var e = elements[i];
-                if (e.kind !== 193 /* OmittedExpression */) {
-                    // Assignment for target = value.propName should highligh whole property, hence use e as source map node
-                    if (e.kind !== 191 /* SpreadElementExpression */) {
-                        emitDestructuringAssignment(e, ts.createElementAccess(value, ts.createLiteral(i)), e);
-                    }
-                    else if (i === numElements - 1) {
-                        emitDestructuringAssignment(e.expression, ts.createArraySlice(value, i), e);
-                    }
-                }
-            }
-        }
-        function emitBindingElement(target, value) {
-            // Any temporary assignments needed to emit target = value should point to target
-            var initializer = visitor ? ts.visitNode(target.initializer, visitor, ts.isExpression) : target.initializer;
+    function flattenBindingOrAssignmentElement(flattenContext, element, value, location, skipInitializer) {
+        if (!skipInitializer) {
+            var initializer = ts.visitNode(ts.getInitializerOfBindingOrAssignmentElement(element), flattenContext.visitor, ts.isExpression);
             if (initializer) {
                 // Combine value and initializer
-                value = value ? createDefaultValueCheck(value, initializer, target) : initializer;
+                value = value ? createDefaultValueCheck(flattenContext, value, initializer, location) : initializer;
             }
             else if (!value) {
                 // Use 'void 0' in absence of value and initializer
                 value = ts.createVoidZero();
             }
-            var name = target.name;
-            if (ts.isBindingPattern(name)) {
-                var elements = name.elements;
-                var numElements = elements.length;
-                if (numElements !== 1) {
-                    // For anything other than a single-element destructuring we need to generate a temporary
-                    // to ensure value is evaluated exactly once. Additionally, if we have zero elements
-                    // we need to emit *something* to ensure that in case a 'var' keyword was already emitted,
-                    // so in that case, we'll intentionally create that temporary.
-                    value = ensureIdentifier(value, /*reuseIdentifierExpressions*/ numElements !== 0, target, emitTempVariableAssignment);
-                }
-                for (var i = 0; i < numElements; i++) {
-                    var element = elements[i];
-                    if (ts.isOmittedExpression(element)) {
-                        continue;
-                    }
-                    else if (name.kind === 167 /* ObjectBindingPattern */) {
-                        // Rewrite element to a declaration with an initializer that fetches property
-                        var propName = element.propertyName || element.name;
-                        emitBindingElement(element, createDestructuringPropertyAccess(value, propName));
+        }
+        var bindingTarget = ts.getTargetOfBindingOrAssignmentElement(element);
+        if (ts.isObjectBindingOrAssignmentPattern(bindingTarget)) {
+            flattenObjectBindingOrAssignmentPattern(flattenContext, element, bindingTarget, value, location);
+        }
+        else if (ts.isArrayBindingOrAssignmentPattern(bindingTarget)) {
+            flattenArrayBindingOrAssignmentPattern(flattenContext, element, bindingTarget, value, location);
+        }
+        else {
+            flattenContext.emitBindingOrAssignment(bindingTarget, value, location, /*original*/ element);
+        }
+    }
+    /**
+     * Flattens an ObjectBindingOrAssignmentPattern into zero or more bindings or assignments.
+     *
+     * @param flattenContext Options used to control flattening.
+     * @param parent The parent element of the pattern.
+     * @param pattern The ObjectBindingOrAssignmentPattern to flatten.
+     * @param value The current RHS value to assign to the element.
+     * @param location The location to use for source maps and comments.
+     */
+    function flattenObjectBindingOrAssignmentPattern(flattenContext, parent, pattern, value, location) {
+        var elements = ts.getElementsOfBindingOrAssignmentPattern(pattern);
+        var numElements = elements.length;
+        if (numElements !== 1) {
+            // For anything other than a single-element destructuring we need to generate a temporary
+            // to ensure value is evaluated exactly once. Additionally, if we have zero elements
+            // we need to emit *something* to ensure that in case a 'var' keyword was already emitted,
+            // so in that case, we'll intentionally create that temporary.
+            var reuseIdentifierExpressions = !ts.isDeclarationBindingElement(parent) || numElements !== 0;
+            value = ensureIdentifier(flattenContext, value, reuseIdentifierExpressions, location);
+        }
+        var bindingElements;
+        var computedTempVariables;
+        for (var i = 0; i < numElements; i++) {
+            var element = elements[i];
+            if (!ts.getRestIndicatorOfBindingOrAssignmentElement(element)) {
+                var propertyName = ts.getPropertyNameOfBindingOrAssignmentElement(element);
+                if (flattenContext.level >= 1 /* ObjectRest */
+                    && !(element.transformFlags & (524288 /* ContainsRest */ | 1048576 /* ContainsObjectRest */))
+                    && !(ts.getTargetOfBindingOrAssignmentElement(element).transformFlags & (524288 /* ContainsRest */ | 1048576 /* ContainsObjectRest */))
+                    && !ts.isComputedPropertyName(propertyName)) {
+                    bindingElements = ts.append(bindingElements, element);
+                }
+                else {
+                    if (bindingElements) {
+                        flattenContext.emitBindingOrAssignment(flattenContext.createObjectBindingOrAssignmentPattern(bindingElements), value, location, pattern);
+                        bindingElements = undefined;
                     }
-                    else {
-                        if (!element.dotDotDotToken) {
-                            // Rewrite element to a declaration that accesses array element at index i
-                            emitBindingElement(element, ts.createElementAccess(value, i));
-                        }
-                        else if (i === numElements - 1) {
-                            emitBindingElement(element, ts.createArraySlice(value, i));
-                        }
+                    var rhsValue = createDestructuringPropertyAccess(flattenContext, value, propertyName);
+                    if (ts.isComputedPropertyName(propertyName)) {
+                        computedTempVariables = ts.append(computedTempVariables, rhsValue.argumentExpression);
                     }
+                    flattenBindingOrAssignmentElement(flattenContext, element, rhsValue, /*location*/ element);
                 }
             }
-            else {
-                emitAssignment(name, value, target, target);
+            else if (i === numElements - 1) {
+                if (bindingElements) {
+                    flattenContext.emitBindingOrAssignment(flattenContext.createObjectBindingOrAssignmentPattern(bindingElements), value, location, pattern);
+                    bindingElements = undefined;
+                }
+                var rhsValue = createRestCall(flattenContext.context, value, elements, computedTempVariables, pattern);
+                flattenBindingOrAssignmentElement(flattenContext, element, rhsValue, element);
             }
         }
-        function createDefaultValueCheck(value, defaultValue, location) {
-            value = ensureIdentifier(value, /*reuseIdentifierExpressions*/ true, location, emitTempVariableAssignment);
-            return ts.createConditional(ts.createStrictEquality(value, ts.createVoidZero()), ts.createToken(53 /* QuestionToken */), defaultValue, ts.createToken(54 /* ColonToken */), value);
+        if (bindingElements) {
+            flattenContext.emitBindingOrAssignment(flattenContext.createObjectBindingOrAssignmentPattern(bindingElements), value, location, pattern);
         }
-        /**
-         * Creates either a PropertyAccessExpression or an ElementAccessExpression for the
-         * right-hand side of a transformed destructuring assignment.
-         *
-         * @param expression The right-hand expression that is the source of the property.
-         * @param propertyName The destructuring property name.
-         */
-        function createDestructuringPropertyAccess(expression, propertyName) {
-            if (ts.isComputedPropertyName(propertyName)) {
-                return ts.createElementAccess(expression, ensureIdentifier(propertyName.expression, /*reuseIdentifierExpressions*/ false, /*location*/ propertyName, emitTempVariableAssignment));
-            }
-            else if (ts.isLiteralExpression(propertyName)) {
-                var clone_2 = ts.getSynthesizedClone(propertyName);
-                clone_2.text = ts.unescapeIdentifier(clone_2.text);
-                return ts.createElementAccess(expression, clone_2);
-            }
-            else {
-                if (ts.isGeneratedIdentifier(propertyName)) {
-                    var clone_3 = ts.getSynthesizedClone(propertyName);
-                    clone_3.text = ts.unescapeIdentifier(clone_3.text);
-                    return ts.createPropertyAccess(expression, clone_3);
+    }
+    /**
+     * Flattens an ArrayBindingOrAssignmentPattern into zero or more bindings or assignments.
+     *
+     * @param flattenContext Options used to control flattening.
+     * @param parent The parent element of the pattern.
+     * @param pattern The ArrayBindingOrAssignmentPattern to flatten.
+     * @param value The current RHS value to assign to the element.
+     * @param location The location to use for source maps and comments.
+     */
+    function flattenArrayBindingOrAssignmentPattern(flattenContext, parent, pattern, value, location) {
+        var elements = ts.getElementsOfBindingOrAssignmentPattern(pattern);
+        var numElements = elements.length;
+        if (flattenContext.level < 1 /* ObjectRest */ && flattenContext.downlevelIteration) {
+            // Read the elements of the iterable into an array
+            value = ensureIdentifier(flattenContext, ts.createReadHelper(flattenContext.context, value, numElements > 0 && ts.getRestIndicatorOfBindingOrAssignmentElement(elements[numElements - 1])
+                ? undefined
+                : numElements, location), 
+            /*reuseIdentifierExpressions*/ false, location);
+        }
+        else if (numElements !== 1 && (flattenContext.level < 1 /* ObjectRest */ || numElements === 0)) {
+            // For anything other than a single-element destructuring we need to generate a temporary
+            // to ensure value is evaluated exactly once. Additionally, if we have zero elements
+            // we need to emit *something* to ensure that in case a 'var' keyword was already emitted,
+            // so in that case, we'll intentionally create that temporary.
+            var reuseIdentifierExpressions = !ts.isDeclarationBindingElement(parent) || numElements !== 0;
+            value = ensureIdentifier(flattenContext, value, reuseIdentifierExpressions, location);
+        }
+        var bindingElements;
+        var restContainingElements;
+        for (var i = 0; i < numElements; i++) {
+            var element = elements[i];
+            if (flattenContext.level >= 1 /* ObjectRest */) {
+                // If an array pattern contains an ObjectRest, we must cache the result so that we
+                // can perform the ObjectRest destructuring in a different declaration
+                if (element.transformFlags & 1048576 /* ContainsObjectRest */) {
+                    var temp = ts.createTempVariable(/*recordTempVariable*/ undefined);
+                    if (flattenContext.hoistTempVariables) {
+                        flattenContext.context.hoistVariableDeclaration(temp);
+                    }
+                    restContainingElements = ts.append(restContainingElements, [temp, element]);
+                    bindingElements = ts.append(bindingElements, flattenContext.createArrayBindingOrAssignmentElement(temp));
                 }
                 else {
-                    return ts.createPropertyAccess(expression, ts.createIdentifier(ts.unescapeIdentifier(propertyName.text)));
+                    bindingElements = ts.append(bindingElements, element);
                 }
             }
+            else if (ts.isOmittedExpression(element)) {
+                continue;
+            }
+            else if (!ts.getRestIndicatorOfBindingOrAssignmentElement(element)) {
+                var rhsValue = ts.createElementAccess(value, i);
+                flattenBindingOrAssignmentElement(flattenContext, element, rhsValue, /*location*/ element);
+            }
+            else if (i === numElements - 1) {
+                var rhsValue = ts.createArraySlice(value, i);
+                flattenBindingOrAssignmentElement(flattenContext, element, rhsValue, /*location*/ element);
+            }
+        }
+        if (bindingElements) {
+            flattenContext.emitBindingOrAssignment(flattenContext.createArrayBindingOrAssignmentPattern(bindingElements), value, location, pattern);
+        }
+        if (restContainingElements) {
+            for (var _i = 0, restContainingElements_1 = restContainingElements; _i < restContainingElements_1.length; _i++) {
+                var _a = restContainingElements_1[_i], id = _a[0], element = _a[1];
+                flattenBindingOrAssignmentElement(flattenContext, element, id, element);
+            }
+        }
+    }
+    /**
+     * Creates an expression used to provide a default value if a value is `undefined` at runtime.
+     *
+     * @param flattenContext Options used to control flattening.
+     * @param value The RHS value to test.
+     * @param defaultValue The default value to use if `value` is `undefined` at runtime.
+     * @param location The location to use for source maps and comments.
+     */
+    function createDefaultValueCheck(flattenContext, value, defaultValue, location) {
+        value = ensureIdentifier(flattenContext, value, /*reuseIdentifierExpressions*/ true, location);
+        return ts.createConditional(ts.createTypeCheck(value, "undefined"), defaultValue, value);
+    }
+    /**
+     * Creates either a PropertyAccessExpression or an ElementAccessExpression for the
+     * right-hand side of a transformed destructuring assignment.
+     *
+     * @link https://tc39.github.io/ecma262/#sec-runtime-semantics-keyeddestructuringassignmentevaluation
+     *
+     * @param flattenContext Options used to control flattening.
+     * @param value The RHS value that is the source of the property.
+     * @param propertyName The destructuring property name.
+     */
+    function createDestructuringPropertyAccess(flattenContext, value, propertyName) {
+        if (ts.isComputedPropertyName(propertyName)) {
+            var argumentExpression = ensureIdentifier(flattenContext, propertyName.expression, /*reuseIdentifierExpressions*/ false, /*location*/ propertyName);
+            return ts.createElementAccess(value, argumentExpression);
+        }
+        else if (ts.isStringOrNumericLiteral(propertyName)) {
+            var argumentExpression = ts.getSynthesizedClone(propertyName);
+            argumentExpression.text = ts.unescapeIdentifier(argumentExpression.text);
+            return ts.createElementAccess(value, argumentExpression);
+        }
+        else {
+            var name_46 = ts.createIdentifier(ts.unescapeIdentifier(propertyName.text));
+            return ts.createPropertyAccess(value, name_46);
         }
     }
     /**
@@ -45235,23 +54219,79 @@ var ts;
      * This function is useful to ensure that the expression's value can be read from in subsequent expressions.
      * Unless 'reuseIdentifierExpressions' is false, 'value' will be returned if it is just an identifier.
      *
+     * @param flattenContext Options used to control flattening.
      * @param value the expression whose value needs to be bound.
      * @param reuseIdentifierExpressions true if identifier expressions can simply be returned;
-     *                                   false if it is necessary to always emit an identifier.
+     * false if it is necessary to always emit an identifier.
      * @param location The location to use for source maps and comments.
-     * @param emitTempVariableAssignment A callback used to emit a temporary variable.
-     * @param visitor An optional callback used to visit the value.
      */
-    function ensureIdentifier(value, reuseIdentifierExpressions, location, emitTempVariableAssignment, visitor) {
+    function ensureIdentifier(flattenContext, value, reuseIdentifierExpressions, location) {
         if (ts.isIdentifier(value) && reuseIdentifierExpressions) {
             return value;
         }
         else {
-            if (visitor) {
-                value = ts.visitNode(value, visitor, ts.isExpression);
+            var temp = ts.createTempVariable(/*recordTempVariable*/ undefined);
+            if (flattenContext.hoistTempVariables) {
+                flattenContext.context.hoistVariableDeclaration(temp);
+                flattenContext.emitExpression(ts.setTextRange(ts.createAssignment(temp, value), location));
+            }
+            else {
+                flattenContext.emitBindingOrAssignment(temp, value, location, /*original*/ undefined);
+            }
+            return temp;
+        }
+    }
+    function makeArrayBindingPattern(elements) {
+        ts.Debug.assertEachNode(elements, ts.isArrayBindingElement);
+        return ts.createArrayBindingPattern(elements);
+    }
+    function makeArrayAssignmentPattern(elements) {
+        return ts.createArrayLiteral(ts.map(elements, ts.convertToArrayAssignmentElement));
+    }
+    function makeObjectBindingPattern(elements) {
+        ts.Debug.assertEachNode(elements, ts.isBindingElement);
+        return ts.createObjectBindingPattern(elements);
+    }
+    function makeObjectAssignmentPattern(elements) {
+        return ts.createObjectLiteral(ts.map(elements, ts.convertToObjectAssignmentElement));
+    }
+    function makeBindingElement(name) {
+        return ts.createBindingElement(/*dotDotDotToken*/ undefined, /*propertyName*/ undefined, name);
+    }
+    function makeAssignmentElement(name) {
+        return name;
+    }
+    var restHelper = {
+        name: "typescript:rest",
+        scoped: false,
+        text: "\n            var __rest = (this && this.__rest) || function (s, e) {\n                var t = {};\n                for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)\n                    t[p] = s[p];\n                if (s != null && typeof Object.getOwnPropertySymbols === \"function\")\n                    for (var i = 0, p = Object.getOwnPropertySymbols(s); i < p.length; i++) if (e.indexOf(p[i]) < 0)\n                        t[p[i]] = s[p[i]];\n                return t;\n            };"
+    };
+    /** Given value: o, propName: p, pattern: { a, b, ...p } from the original statement
+     * `{ a, b, ...p } = o`, create `p = __rest(o, ["a", "b"]);`
+     */
+    function createRestCall(context, value, elements, computedTempVariables, location) {
+        context.requestEmitHelper(restHelper);
+        var propertyNames = [];
+        var computedTempVariableOffset = 0;
+        for (var i = 0; i < elements.length - 1; i++) {
+            var propertyName = ts.getPropertyNameOfBindingOrAssignmentElement(elements[i]);
+            if (propertyName) {
+                if (ts.isComputedPropertyName(propertyName)) {
+                    var temp = computedTempVariables[computedTempVariableOffset];
+                    computedTempVariableOffset++;
+                    // typeof _tmp === "symbol" ? _tmp : _tmp + ""
+                    propertyNames.push(ts.createConditional(ts.createTypeCheck(temp, "symbol"), temp, ts.createAdd(temp, ts.createLiteral(""))));
+                }
+                else {
+                    propertyNames.push(ts.createLiteral(propertyName));
+                }
             }
-            return emitTempVariableAssignment(value, location);
         }
+        return ts.createCall(ts.getHelperName("__rest"), 
+        /*typeArguments*/ undefined, [
+            value,
+            ts.setTextRange(ts.createArrayLiteral(propertyNames), location)
+        ]);
     }
 })(ts || (ts = {}));
 /// <reference path="../factory.ts" />
@@ -45270,13 +54310,27 @@ var ts;
         TypeScriptSubstitutionFlags[TypeScriptSubstitutionFlags["ClassAliases"] = 1] = "ClassAliases";
         /** Enables substitutions for namespace exports. */
         TypeScriptSubstitutionFlags[TypeScriptSubstitutionFlags["NamespaceExports"] = 2] = "NamespaceExports";
-        /** Enables substitutions for async methods with `super` calls. */
-        TypeScriptSubstitutionFlags[TypeScriptSubstitutionFlags["AsyncMethodsWithSuper"] = 4] = "AsyncMethodsWithSuper";
         /* Enables substitutions for unqualified enum members */
         TypeScriptSubstitutionFlags[TypeScriptSubstitutionFlags["NonQualifiedEnumMembers"] = 8] = "NonQualifiedEnumMembers";
     })(TypeScriptSubstitutionFlags || (TypeScriptSubstitutionFlags = {}));
+    var ClassFacts;
+    (function (ClassFacts) {
+        ClassFacts[ClassFacts["None"] = 0] = "None";
+        ClassFacts[ClassFacts["HasStaticInitializedProperties"] = 1] = "HasStaticInitializedProperties";
+        ClassFacts[ClassFacts["HasConstructorDecorators"] = 2] = "HasConstructorDecorators";
+        ClassFacts[ClassFacts["HasMemberDecorators"] = 4] = "HasMemberDecorators";
+        ClassFacts[ClassFacts["IsExportOfNamespace"] = 8] = "IsExportOfNamespace";
+        ClassFacts[ClassFacts["IsNamedExternalExport"] = 16] = "IsNamedExternalExport";
+        ClassFacts[ClassFacts["IsDefaultExternalExport"] = 32] = "IsDefaultExternalExport";
+        ClassFacts[ClassFacts["HasExtendsClause"] = 64] = "HasExtendsClause";
+        ClassFacts[ClassFacts["UseImmediatelyInvokedFunctionExpression"] = 128] = "UseImmediatelyInvokedFunctionExpression";
+        ClassFacts[ClassFacts["HasAnyDecorators"] = 6] = "HasAnyDecorators";
+        ClassFacts[ClassFacts["NeedsName"] = 5] = "NeedsName";
+        ClassFacts[ClassFacts["MayNeedImmediatelyInvokedFunctionExpression"] = 7] = "MayNeedImmediatelyInvokedFunctionExpression";
+        ClassFacts[ClassFacts["IsExported"] = 56] = "IsExported";
+    })(ClassFacts || (ClassFacts = {}));
     function transformTypeScript(context) {
-        var startLexicalEnvironment = context.startLexicalEnvironment, endLexicalEnvironment = context.endLexicalEnvironment, hoistVariableDeclaration = context.hoistVariableDeclaration;
+        var startLexicalEnvironment = context.startLexicalEnvironment, resumeLexicalEnvironment = context.resumeLexicalEnvironment, endLexicalEnvironment = context.endLexicalEnvironment, hoistVariableDeclaration = context.hoistVariableDeclaration;
         var resolver = context.getEmitResolver();
         var compilerOptions = context.getCompilerOptions();
         var languageVersion = ts.getEmitScriptTarget(compilerOptions);
@@ -45288,15 +54342,14 @@ var ts;
         context.onEmitNode = onEmitNode;
         context.onSubstituteNode = onSubstituteNode;
         // Enable substitution for property/element access to emit const enum values.
-        context.enableSubstitution(172 /* PropertyAccessExpression */);
-        context.enableSubstitution(173 /* ElementAccessExpression */);
+        context.enableSubstitution(179 /* PropertyAccessExpression */);
+        context.enableSubstitution(180 /* ElementAccessExpression */);
         // These variables contain state that changes as we descend into the tree.
         var currentSourceFile;
         var currentNamespace;
         var currentNamespaceContainerName;
         var currentScope;
         var currentScopeFirstDeclarationsOfName;
-        var currentSourceFileExternalHelpersModuleName;
         /**
          * Keeps track of whether expression substitution has been enabled for specific edge cases.
          * They are persisted between each SourceFile transformation and should not be reset.
@@ -45312,11 +54365,6 @@ var ts;
          * just-in-time substitution while printing an expression identifier.
          */
         var applicableSubstitutions;
-        /**
-         * This keeps track of containers where `super` is valid, for use with
-         * just-in-time substitution for `super` expressions inside of async methods.
-         */
-        var currentSuperContainer;
         return transformSourceFile;
         /**
          * Transform TypeScript-specific syntax in a SourceFile.
@@ -45324,10 +54372,14 @@ var ts;
          * @param node A SourceFile node.
          */
         function transformSourceFile(node) {
-            if (ts.isDeclarationFile(node)) {
+            if (node.isDeclarationFile) {
                 return node;
             }
-            return ts.visitNode(node, visitor, ts.isSourceFile);
+            currentSourceFile = node;
+            var visited = saveStateAndInvoke(node, visitSourceFile);
+            ts.addEmitHelpers(visited, context.readEmitHelpers());
+            currentSourceFile = undefined;
+            return visited;
         }
         /**
          * Visits a node, saving and restoring state variables on the stack.
@@ -45348,6 +54400,29 @@ var ts;
             currentScope = savedCurrentScope;
             return visited;
         }
+        /**
+         * Performs actions that should always occur immediately before visiting a node.
+         *
+         * @param node The node to visit.
+         */
+        function onBeforeVisitNode(node) {
+            switch (node.kind) {
+                case 265 /* SourceFile */:
+                case 235 /* CaseBlock */:
+                case 234 /* ModuleBlock */:
+                case 207 /* Block */:
+                    currentScope = node;
+                    currentScopeFirstDeclarationsOfName = undefined;
+                    break;
+                case 229 /* ClassDeclaration */:
+                case 228 /* FunctionDeclaration */:
+                    if (ts.hasModifier(node, 2 /* Ambient */)) {
+                        break;
+                    }
+                    recordEmittedDeclarationInScope(node);
+                    break;
+            }
+        }
         /**
          * General-purpose node visitor.
          *
@@ -45362,10 +54437,7 @@ var ts;
          * @param node The node to visit.
          */
         function visitorWorker(node) {
-            if (node.kind === 256 /* SourceFile */) {
-                return visitSourceFile(node);
-            }
-            else if (node.transformFlags & 1 /* TypeScript */) {
+            if (node.transformFlags & 1 /* TypeScript */) {
                 // This node is explicitly marked as TypeScript, so we should transform the node.
                 return visitTypeScript(node);
             }
@@ -45375,6 +54447,33 @@ var ts;
             }
             return node;
         }
+        /**
+         * Specialized visitor that visits the immediate children of a SourceFile.
+         *
+         * @param node The node to visit.
+         */
+        function sourceElementVisitor(node) {
+            return saveStateAndInvoke(node, sourceElementVisitorWorker);
+        }
+        /**
+         * Specialized visitor that visits the immediate children of a SourceFile.
+         *
+         * @param node The node to visit.
+         */
+        function sourceElementVisitorWorker(node) {
+            switch (node.kind) {
+                case 238 /* ImportDeclaration */:
+                    return visitImportDeclaration(node);
+                case 237 /* ImportEqualsDeclaration */:
+                    return visitImportEqualsDeclaration(node);
+                case 243 /* ExportAssignment */:
+                    return visitExportAssignment(node);
+                case 244 /* ExportDeclaration */:
+                    return visitExportDeclaration(node);
+                default:
+                    return visitorWorker(node);
+            }
+        }
         /**
          * Specialized visitor that visits the immediate children of a namespace.
          *
@@ -45389,11 +54488,11 @@ var ts;
          * @param node The node to visit.
          */
         function namespaceElementVisitorWorker(node) {
-            if (node.kind === 236 /* ExportDeclaration */ ||
-                node.kind === 230 /* ImportDeclaration */ ||
-                node.kind === 231 /* ImportClause */ ||
-                (node.kind === 229 /* ImportEqualsDeclaration */ &&
-                    node.moduleReference.kind === 240 /* ExternalModuleReference */)) {
+            if (node.kind === 244 /* ExportDeclaration */ ||
+                node.kind === 238 /* ImportDeclaration */ ||
+                node.kind === 239 /* ImportClause */ ||
+                (node.kind === 237 /* ImportEqualsDeclaration */ &&
+                    node.moduleReference.kind === 248 /* ExternalModuleReference */)) {
                 // do not emit ES6 imports and exports since they are illegal inside a namespace
                 return undefined;
             }
@@ -45423,25 +54522,34 @@ var ts;
          */
         function classElementVisitorWorker(node) {
             switch (node.kind) {
-                case 148 /* Constructor */:
+                case 152 /* Constructor */:
                     // TypeScript constructors are transformed in `visitClassDeclaration`.
                     // We elide them here as `visitorWorker` checks transform flags, which could
                     // erronously include an ES6 constructor without TypeScript syntax.
                     return undefined;
-                case 145 /* PropertyDeclaration */:
-                case 153 /* IndexSignature */:
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                case 147 /* MethodDeclaration */:
+                case 149 /* PropertyDeclaration */:
+                case 157 /* IndexSignature */:
+                case 153 /* GetAccessor */:
+                case 154 /* SetAccessor */:
+                case 151 /* MethodDeclaration */:
                     // Fallback to the default visit behavior.
                     return visitorWorker(node);
-                case 198 /* SemicolonClassElement */:
+                case 206 /* SemicolonClassElement */:
                     return node;
                 default:
                     ts.Debug.failBadSyntaxKind(node);
                     return undefined;
             }
         }
+        function modifierVisitor(node) {
+            if (ts.modifierToFlag(node.kind) & 2270 /* TypeScriptModifier */) {
+                return undefined;
+            }
+            else if (currentNamespace && node.kind === 84 /* ExportKeyword */) {
+                return undefined;
+            }
+            return node;
+        }
         /**
          * Branching visitor, visits a TypeScript syntax node.
          *
@@ -45454,57 +54562,61 @@ var ts;
                 return ts.createNotEmittedStatement(node);
             }
             switch (node.kind) {
-                case 82 /* ExportKeyword */:
-                case 77 /* DefaultKeyword */:
+                case 84 /* ExportKeyword */:
+                case 79 /* DefaultKeyword */:
                     // ES6 export and default modifiers are elided when inside a namespace.
                     return currentNamespace ? undefined : node;
-                case 112 /* PublicKeyword */:
-                case 110 /* PrivateKeyword */:
-                case 111 /* ProtectedKeyword */:
-                case 115 /* AbstractKeyword */:
-                case 118 /* AsyncKeyword */:
-                case 74 /* ConstKeyword */:
-                case 122 /* DeclareKeyword */:
-                case 128 /* ReadonlyKeyword */:
+                case 114 /* PublicKeyword */:
+                case 112 /* PrivateKeyword */:
+                case 113 /* ProtectedKeyword */:
+                case 117 /* AbstractKeyword */:
+                case 76 /* ConstKeyword */:
+                case 124 /* DeclareKeyword */:
+                case 131 /* ReadonlyKeyword */:
                 // TypeScript accessibility and readonly modifiers are elided.
-                case 160 /* ArrayType */:
-                case 161 /* TupleType */:
-                case 159 /* TypeLiteral */:
-                case 154 /* TypePredicate */:
-                case 141 /* TypeParameter */:
-                case 117 /* AnyKeyword */:
-                case 120 /* BooleanKeyword */:
-                case 132 /* StringKeyword */:
-                case 130 /* NumberKeyword */:
-                case 127 /* NeverKeyword */:
-                case 103 /* VoidKeyword */:
-                case 133 /* SymbolKeyword */:
-                case 157 /* ConstructorType */:
-                case 156 /* FunctionType */:
-                case 158 /* TypeQuery */:
-                case 155 /* TypeReference */:
-                case 162 /* UnionType */:
-                case 163 /* IntersectionType */:
-                case 164 /* ParenthesizedType */:
-                case 165 /* ThisType */:
-                case 166 /* LiteralType */:
+                case 164 /* ArrayType */:
+                case 165 /* TupleType */:
+                case 163 /* TypeLiteral */:
+                case 158 /* TypePredicate */:
+                case 145 /* TypeParameter */:
+                case 119 /* AnyKeyword */:
+                case 122 /* BooleanKeyword */:
+                case 136 /* StringKeyword */:
+                case 133 /* NumberKeyword */:
+                case 130 /* NeverKeyword */:
+                case 105 /* VoidKeyword */:
+                case 137 /* SymbolKeyword */:
+                case 161 /* ConstructorType */:
+                case 160 /* FunctionType */:
+                case 162 /* TypeQuery */:
+                case 159 /* TypeReference */:
+                case 166 /* UnionType */:
+                case 167 /* IntersectionType */:
+                case 168 /* ParenthesizedType */:
+                case 169 /* ThisType */:
+                case 170 /* TypeOperator */:
+                case 171 /* IndexedAccessType */:
+                case 172 /* MappedType */:
+                case 173 /* LiteralType */:
                 // TypeScript type nodes are elided.
-                case 153 /* IndexSignature */:
+                case 157 /* IndexSignature */:
                 // TypeScript index signatures are elided.
-                case 143 /* Decorator */:
+                case 147 /* Decorator */:
                 // TypeScript decorators are elided. They will be emitted as part of visitClassDeclaration.
-                case 223 /* TypeAliasDeclaration */:
+                case 231 /* TypeAliasDeclaration */:
                 // TypeScript type-only declarations are elided.
-                case 145 /* PropertyDeclaration */:
+                case 149 /* PropertyDeclaration */:
                 // TypeScript property declarations are elided.
-                case 148 /* Constructor */:
-                    // TypeScript constructors are transformed in `visitClassDeclaration`.
+                case 236 /* NamespaceExportDeclaration */:
+                    // TypeScript namespace export declarations are elided.
                     return undefined;
-                case 222 /* InterfaceDeclaration */:
+                case 152 /* Constructor */:
+                    return visitConstructor(node);
+                case 230 /* InterfaceDeclaration */:
                     // TypeScript interfaces are elided, but some comments may be preserved.
                     // See the implementation of `getLeadingComments` in comments.ts for more details.
                     return ts.createNotEmittedStatement(node);
-                case 221 /* ClassDeclaration */:
+                case 229 /* ClassDeclaration */:
                     // This is a class declaration with TypeScript syntax extensions.
                     //
                     // TypeScript class syntax extensions include:
@@ -45514,9 +54626,8 @@ var ts;
                     // - property declarations
                     // - index signatures
                     // - method overload signatures
-                    // - async methods
                     return visitClassDeclaration(node);
-                case 192 /* ClassExpression */:
+                case 199 /* ClassExpression */:
                     // This is a class expression with TypeScript syntax extensions.
                     //
                     // TypeScript class syntax extensions include:
@@ -45526,37 +54637,36 @@ var ts;
                     // - property declarations
                     // - index signatures
                     // - method overload signatures
-                    // - async methods
                     return visitClassExpression(node);
-                case 251 /* HeritageClause */:
+                case 259 /* HeritageClause */:
                     // This is a heritage clause with TypeScript syntax extensions.
                     //
                     // TypeScript heritage clause extensions include:
                     // - `implements` clause
                     return visitHeritageClause(node);
-                case 194 /* ExpressionWithTypeArguments */:
+                case 201 /* ExpressionWithTypeArguments */:
                     // TypeScript supports type arguments on an expression in an `extends` heritage clause.
                     return visitExpressionWithTypeArguments(node);
-                case 147 /* MethodDeclaration */:
-                    // TypeScript method declarations may be 'async', and may have decorators, modifiers
+                case 151 /* MethodDeclaration */:
+                    // TypeScript method declarations may have decorators, modifiers
                     // or type annotations.
                     return visitMethodDeclaration(node);
-                case 149 /* GetAccessor */:
+                case 153 /* GetAccessor */:
                     // Get Accessors can have TypeScript modifiers, decorators, and type annotations.
                     return visitGetAccessor(node);
-                case 150 /* SetAccessor */:
-                    // Set Accessors can have TypeScript modifiers, decorators, and type annotations.
+                case 154 /* SetAccessor */:
+                    // Set Accessors can have TypeScript modifiers and type annotations.
                     return visitSetAccessor(node);
-                case 220 /* FunctionDeclaration */:
-                    // TypeScript function declarations may be 'async'
+                case 228 /* FunctionDeclaration */:
+                    // Typescript function declarations can have modifiers, decorators, and type annotations.
                     return visitFunctionDeclaration(node);
-                case 179 /* FunctionExpression */:
-                    // TypeScript function expressions may be 'async'
+                case 186 /* FunctionExpression */:
+                    // TypeScript function expressions can have modifiers and type annotations.
                     return visitFunctionExpression(node);
-                case 180 /* ArrowFunction */:
-                    // TypeScript arrow functions may be 'async'
+                case 187 /* ArrowFunction */:
+                    // TypeScript arrow functions can have modifiers and type annotations.
                     return visitArrowFunction(node);
-                case 142 /* Parameter */:
+                case 146 /* Parameter */:
                     // This is a parameter declaration with TypeScript syntax extensions.
                     //
                     // TypeScript parameter declaration syntax extensions include:
@@ -45566,30 +54676,33 @@ var ts;
                     // - type annotations
                     // - this parameters
                     return visitParameter(node);
-                case 178 /* ParenthesizedExpression */:
+                case 185 /* ParenthesizedExpression */:
                     // ParenthesizedExpressions are TypeScript if their expression is a
                     // TypeAssertion or AsExpression
                     return visitParenthesizedExpression(node);
-                case 177 /* TypeAssertionExpression */:
-                case 195 /* AsExpression */:
+                case 184 /* TypeAssertionExpression */:
+                case 202 /* AsExpression */:
                     // TypeScript type assertions are removed, but their subtrees are preserved.
                     return visitAssertionExpression(node);
-                case 196 /* NonNullExpression */:
+                case 181 /* CallExpression */:
+                    return visitCallExpression(node);
+                case 182 /* NewExpression */:
+                    return visitNewExpression(node);
+                case 203 /* NonNullExpression */:
                     // TypeScript non-null expressions are removed, but their subtrees are preserved.
                     return visitNonNullExpression(node);
-                case 224 /* EnumDeclaration */:
+                case 232 /* EnumDeclaration */:
                     // TypeScript enum declarations do not exist in ES6 and must be rewritten.
                     return visitEnumDeclaration(node);
-                case 184 /* AwaitExpression */:
-                    // TypeScript 'await' expressions must be transformed.
-                    return visitAwaitExpression(node);
-                case 200 /* VariableStatement */:
+                case 208 /* VariableStatement */:
                     // TypeScript namespace exports for variable statements must be transformed.
                     return visitVariableStatement(node);
-                case 225 /* ModuleDeclaration */:
+                case 226 /* VariableDeclaration */:
+                    return visitVariableDeclaration(node);
+                case 233 /* ModuleDeclaration */:
                     // TypeScript namespace declarations must be transformed.
                     return visitModuleDeclaration(node);
-                case 229 /* ImportEqualsDeclaration */:
+                case 237 /* ImportEqualsDeclaration */:
                     // TypeScript namespace or external module import.
                     return visitImportEqualsDeclaration(node);
                 default:
@@ -45597,59 +54710,10 @@ var ts;
                     return ts.visitEachChild(node, visitor, context);
             }
         }
-        /**
-         * Performs actions that should always occur immediately before visiting a node.
-         *
-         * @param node The node to visit.
-         */
-        function onBeforeVisitNode(node) {
-            switch (node.kind) {
-                case 256 /* SourceFile */:
-                case 227 /* CaseBlock */:
-                case 226 /* ModuleBlock */:
-                case 199 /* Block */:
-                    currentScope = node;
-                    currentScopeFirstDeclarationsOfName = undefined;
-                    break;
-                case 221 /* ClassDeclaration */:
-                case 220 /* FunctionDeclaration */:
-                    if (ts.hasModifier(node, 2 /* Ambient */)) {
-                        break;
-                    }
-                    recordEmittedDeclarationInScope(node);
-                    break;
-            }
-        }
         function visitSourceFile(node) {
-            currentSourceFile = node;
-            // If the source file requires any helpers and is an external module, and
-            // the importHelpers compiler option is enabled, emit a synthesized import
-            // statement for the helpers library.
-            if (node.flags & 31744 /* EmitHelperFlags */
-                && compilerOptions.importHelpers
-                && (ts.isExternalModule(node) || compilerOptions.isolatedModules)) {
-                startLexicalEnvironment();
-                var statements = [];
-                var statementOffset = ts.addPrologueDirectives(statements, node.statements, /*ensureUseStrict*/ false, visitor);
-                var externalHelpersModuleName = ts.createUniqueName(ts.externalHelpersModuleNameText);
-                var externalHelpersModuleImport = ts.createImportDeclaration(
-                /*decorators*/ undefined, 
-                /*modifiers*/ undefined, ts.createImportClause(/*name*/ undefined, ts.createNamespaceImport(externalHelpersModuleName)), ts.createLiteral(ts.externalHelpersModuleNameText));
-                externalHelpersModuleImport.parent = node;
-                externalHelpersModuleImport.flags &= ~8 /* Synthesized */;
-                statements.push(externalHelpersModuleImport);
-                currentSourceFileExternalHelpersModuleName = externalHelpersModuleName;
-                ts.addRange(statements, ts.visitNodes(node.statements, visitor, ts.isStatement, statementOffset));
-                ts.addRange(statements, endLexicalEnvironment());
-                currentSourceFileExternalHelpersModuleName = undefined;
-                node = ts.updateSourceFileNode(node, ts.createNodeArray(statements, node.statements));
-                node.externalHelpersModuleName = externalHelpersModuleName;
-            }
-            else {
-                node = ts.visitEachChild(node, visitor, context);
-            }
-            ts.setEmitFlags(node, 1 /* EmitEmitHelpers */ | ts.getEmitFlags(node));
-            return node;
+            var alwaysStrict = (compilerOptions.alwaysStrict === undefined ? compilerOptions.strict : compilerOptions.alwaysStrict) &&
+                !(ts.isExternalModule(node) && moduleKind === ts.ModuleKind.ES2015);
+            return ts.updateSourceFileNode(node, ts.visitLexicalEnvironment(node.statements, sourceElementVisitor, context, /*start*/ 0, alwaysStrict));
         }
         /**
          * Tests whether we should emit a __decorate call for a class declaration.
@@ -45670,6 +54734,26 @@ var ts;
         function shouldEmitDecorateCallForParameter(parameter) {
             return parameter.decorators !== undefined && parameter.decorators.length > 0;
         }
+        function getClassFacts(node, staticProperties) {
+            var facts = 0 /* None */;
+            if (ts.some(staticProperties))
+                facts |= 1 /* HasStaticInitializedProperties */;
+            if (ts.getClassExtendsHeritageClauseElement(node))
+                facts |= 64 /* HasExtendsClause */;
+            if (shouldEmitDecorateCallForClass(node))
+                facts |= 2 /* HasConstructorDecorators */;
+            if (ts.childIsDecorated(node))
+                facts |= 4 /* HasMemberDecorators */;
+            if (isExportOfNamespace(node))
+                facts |= 8 /* IsExportOfNamespace */;
+            else if (isDefaultExternalModuleExport(node))
+                facts |= 32 /* IsDefaultExternalExport */;
+            else if (isNamedExternalModuleExport(node))
+                facts |= 16 /* IsNamedExternalExport */;
+            if (languageVersion <= 1 /* ES5 */ && (facts & 7 /* MayNeedImmediatelyInvokedFunctionExpression */))
+                facts |= 128 /* UseImmediatelyInvokedFunctionExpression */;
+            return facts;
+        }
         /**
          * Transforms a class declaration with TypeScript syntax into compatible ES6.
          *
@@ -45683,77 +54767,117 @@ var ts;
          */
         function visitClassDeclaration(node) {
             var staticProperties = getInitializedProperties(node, /*isStatic*/ true);
-            var hasExtendsClause = ts.getClassExtendsHeritageClauseElement(node) !== undefined;
-            var isDecoratedClass = shouldEmitDecorateCallForClass(node);
-            var classAlias;
-            // emit name if
-            // - node has a name
-            // - node has static initializers
-            //
-            var name = node.name;
-            if (!name && staticProperties.length > 0) {
-                name = ts.getGeneratedNameForNode(node);
-            }
-            var statements = [];
-            if (!isDecoratedClass) {
-                //  ${modifiers} class ${name} ${heritageClauses} {
-                //      ${members}
-                //  }
-                var classDeclaration = ts.createClassDeclaration(
-                /*decorators*/ undefined, ts.visitNodes(node.modifiers, visitor, ts.isModifier), name, 
-                /*typeParameters*/ undefined, ts.visitNodes(node.heritageClauses, visitor, ts.isHeritageClause), transformClassMembers(node, hasExtendsClause), 
-                /*location*/ node);
-                ts.setOriginalNode(classDeclaration, node);
-                // To better align with the old emitter, we should not emit a trailing source map
-                // entry if the class has static properties.
-                if (staticProperties.length > 0) {
-                    ts.setEmitFlags(classDeclaration, 1024 /* NoTrailingSourceMap */ | ts.getEmitFlags(classDeclaration));
-                }
-                statements.push(classDeclaration);
-            }
-            else {
-                classAlias = addClassDeclarationHeadWithDecorators(statements, node, name, hasExtendsClause);
+            var facts = getClassFacts(node, staticProperties);
+            if (facts & 128 /* UseImmediatelyInvokedFunctionExpression */) {
+                context.startLexicalEnvironment();
             }
+            var name = node.name || (facts & 5 /* NeedsName */ ? ts.getGeneratedNameForNode(node) : undefined);
+            var classStatement = facts & 2 /* HasConstructorDecorators */
+                ? createClassDeclarationHeadWithDecorators(node, name, facts)
+                : createClassDeclarationHeadWithoutDecorators(node, name, facts);
+            var statements = [classStatement];
             // Emit static property assignment. Because classDeclaration is lexically evaluated,
             // it is safe to emit static property assignment after classDeclaration
             // From ES6 specification:
             //      HasLexicalDeclaration (N) : Determines if the argument identifier has a binding in this environment record that was created using
             //                                  a lexical declaration such as a LexicalDeclaration or a ClassDeclaration.
-            if (staticProperties.length) {
-                addInitializedPropertyStatements(statements, node, staticProperties, getLocalName(node, /*noSourceMaps*/ true));
+            if (facts & 1 /* HasStaticInitializedProperties */) {
+                addInitializedPropertyStatements(statements, staticProperties, facts & 128 /* UseImmediatelyInvokedFunctionExpression */ ? ts.getInternalName(node) : ts.getLocalName(node));
             }
             // Write any decorators of the node.
             addClassElementDecorationStatements(statements, node, /*isStatic*/ false);
             addClassElementDecorationStatements(statements, node, /*isStatic*/ true);
-            addConstructorDecorationStatement(statements, node, classAlias);
+            addConstructorDecorationStatement(statements, node);
+            if (facts & 128 /* UseImmediatelyInvokedFunctionExpression */) {
+                // When we emit a TypeScript class down to ES5, we must wrap it in an IIFE so that the
+                // 'es2015' transformer can properly nest static initializers and decorators. The result
+                // looks something like:
+                //
+                //  var C = function () {
+                //      class C {
+                //      }
+                //      C.static_prop = 1;
+                //      return C;
+                //  }();
+                //
+                var closingBraceLocation = ts.createTokenRange(ts.skipTrivia(currentSourceFile.text, node.members.end), 18 /* CloseBraceToken */);
+                var localName = ts.getInternalName(node);
+                // The following partially-emitted expression exists purely to align our sourcemap
+                // emit with the original emitter.
+                var outer = ts.createPartiallyEmittedExpression(localName);
+                outer.end = closingBraceLocation.end;
+                ts.setEmitFlags(outer, 1536 /* NoComments */);
+                var statement = ts.createReturn(outer);
+                statement.pos = closingBraceLocation.pos;
+                ts.setEmitFlags(statement, 1536 /* NoComments */ | 384 /* NoTokenSourceMaps */);
+                statements.push(statement);
+                ts.addRange(statements, context.endLexicalEnvironment());
+                var varStatement = ts.createVariableStatement(
+                /*modifiers*/ undefined, ts.createVariableDeclarationList([
+                    ts.createVariableDeclaration(ts.getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ false), 
+                    /*type*/ undefined, ts.createImmediatelyInvokedFunctionExpression(statements))
+                ]));
+                ts.setOriginalNode(varStatement, node);
+                ts.setCommentRange(varStatement, node);
+                ts.setSourceMapRange(varStatement, ts.moveRangePastDecorators(node));
+                ts.startOnNewLine(varStatement);
+                statements = [varStatement];
+            }
             // If the class is exported as part of a TypeScript namespace, emit the namespace export.
             // Otherwise, if the class was exported at the top level and was decorated, emit an export
             // declaration or export default for the class.
-            if (isNamespaceExport(node)) {
+            if (facts & 8 /* IsExportOfNamespace */) {
                 addExportMemberAssignment(statements, node);
             }
-            else if (isDecoratedClass) {
-                if (isDefaultExternalModuleExport(node)) {
-                    statements.push(ts.createExportAssignment(
-                    /*decorators*/ undefined, 
-                    /*modifiers*/ undefined, 
-                    /*isExportEquals*/ false, getLocalName(node)));
+            else if (facts & 128 /* UseImmediatelyInvokedFunctionExpression */ || facts & 2 /* HasConstructorDecorators */) {
+                if (facts & 32 /* IsDefaultExternalExport */) {
+                    statements.push(ts.createExportDefault(ts.getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ true)));
                 }
-                else if (isNamedExternalModuleExport(node)) {
-                    statements.push(createExternalModuleExport(name));
+                else if (facts & 16 /* IsNamedExternalExport */) {
+                    statements.push(ts.createExternalModuleExport(ts.getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ true)));
                 }
             }
-            return statements;
+            if (statements.length > 1) {
+                // Add a DeclarationMarker as a marker for the end of the declaration
+                statements.push(ts.createEndOfDeclarationMarker(node));
+                ts.setEmitFlags(classStatement, ts.getEmitFlags(classStatement) | 4194304 /* HasEndOfDeclarationMarker */);
+            }
+            return ts.singleOrMany(statements);
         }
         /**
-         * Transforms a decorated class declaration and appends the resulting statements. If
-         * the class requires an alias to avoid issues with double-binding, the alias is returned.
+         * Transforms a non-decorated class declaration and appends the resulting statements.
          *
          * @param node A ClassDeclaration node.
          * @param name The name of the class.
-         * @param hasExtendsClause A value indicating whether
+         * @param facts Precomputed facts about the class.
          */
-        function addClassDeclarationHeadWithDecorators(statements, node, name, hasExtendsClause) {
+        function createClassDeclarationHeadWithoutDecorators(node, name, facts) {
+            //  ${modifiers} class ${name} ${heritageClauses} {
+            //      ${members}
+            //  }
+            // we do not emit modifiers on the declaration if we are emitting an IIFE
+            var modifiers = !(facts & 128 /* UseImmediatelyInvokedFunctionExpression */)
+                ? ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier)
+                : undefined;
+            var classDeclaration = ts.createClassDeclaration(
+            /*decorators*/ undefined, modifiers, name, 
+            /*typeParameters*/ undefined, ts.visitNodes(node.heritageClauses, visitor, ts.isHeritageClause), transformClassMembers(node, (facts & 64 /* HasExtendsClause */) !== 0));
+            // To better align with the old emitter, we should not emit a trailing source map
+            // entry if the class has static properties.
+            var emitFlags = ts.getEmitFlags(node);
+            if (facts & 1 /* HasStaticInitializedProperties */) {
+                emitFlags |= 32 /* NoTrailingSourceMap */;
+            }
+            ts.setTextRange(classDeclaration, node);
+            ts.setOriginalNode(classDeclaration, node);
+            ts.setEmitFlags(classDeclaration, emitFlags);
+            return classDeclaration;
+        }
+        /**
+         * Transforms a decorated class declaration and appends the resulting statements. If
+         * the class requires an alias to avoid issues with double-binding, the alias is returned.
+         */
+        function createClassDeclarationHeadWithDecorators(node, name, facts) {
             // When we emit an ES6 class that has a class decorator, we must tailor the
             // emit to certain specific cases.
             //
@@ -45788,20 +54912,20 @@ var ts;
             //  ---------------------------------------------------------------------
             //  TypeScript                      | Javascript
             //  ---------------------------------------------------------------------
-            //  @dec                            | let C_1 = class C {
+            //  @dec                            | let C = C_1 = class C {
             //  class C {                       |   static x() { return C_1.y; }
             //    static x() { return C.y; }    | }
-            //    static y = 1;                 | let C = C_1;
-            //  }                               | C.y = 1;
-            //                                  | C = C_1 = __decorate([dec], C);
+            //    static y = 1;                 | C.y = 1;
+            //  }                               | C = C_1 = __decorate([dec], C);
+            //                                  | var C_1;
             //  ---------------------------------------------------------------------
-            //  @dec                            | let C_1 = class C {
+            //  @dec                            | let C = class C {
             //  export class C {                |   static x() { return C_1.y; }
             //    static x() { return C.y; }    | }
-            //    static y = 1;                 | let C = C_1;
-            //  }                               | C.y = 1;
-            //                                  | C = C_1 = __decorate([dec], C);
+            //    static y = 1;                 | C.y = 1;
+            //  }                               | C = C_1 = __decorate([dec], C);
             //                                  | export { C };
+            //                                  | var C_1;
             //  ---------------------------------------------------------------------
             //
             // If a class declaration is the default export of a module, we instead emit
@@ -45830,59 +54954,37 @@ var ts;
             //  ---------------------------------------------------------------------
             //  TypeScript                      | Javascript
             //  ---------------------------------------------------------------------
-            //  @dec                            | let C_1 = class C {
+            //  @dec                            | let C = class C {
             //  export default class C {        |   static x() { return C_1.y; }
             //    static x() { return C.y; }    | }
-            //    static y = 1;                 | let C = C_1;
-            //  }                               | C.y = 1;
-            //                                  | C = C_1 = __decorate([dec], C);
+            //    static y = 1;                 | C.y = 1;
+            //  }                               | C = C_1 = __decorate([dec], C);
             //                                  | export default C;
+            //                                  | var C_1;
             //  ---------------------------------------------------------------------
             //
             var location = ts.moveRangePastDecorators(node);
+            var classAlias = getClassAliasIfNeeded(node);
+            var declName = ts.getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ true);
             //  ... = class ${name} ${heritageClauses} {
             //      ${members}
             //  }
-            var classExpression = ts.setOriginalNode(ts.createClassExpression(
-            /*modifiers*/ undefined, name, 
-            /*typeParameters*/ undefined, ts.visitNodes(node.heritageClauses, visitor, ts.isHeritageClause), transformClassMembers(node, hasExtendsClause), 
-            /*location*/ location), node);
-            if (!name) {
-                name = ts.getGeneratedNameForNode(node);
-            }
-            // Record an alias to avoid class double-binding.
-            var classAlias;
-            if (resolver.getNodeCheckFlags(node) & 8388608 /* ClassWithConstructorReference */) {
-                enableSubstitutionForClassAliases();
-                classAlias = ts.createUniqueName(node.name && !ts.isGeneratedIdentifier(node.name) ? node.name.text : "default");
-                classAliases[ts.getOriginalNodeId(node)] = classAlias;
-            }
-            var declaredName = getDeclarationName(node, /*allowComments*/ true);
+            var heritageClauses = ts.visitNodes(node.heritageClauses, visitor, ts.isHeritageClause);
+            var members = transformClassMembers(node, (facts & 64 /* HasExtendsClause */) !== 0);
+            var classExpression = ts.createClassExpression(/*modifiers*/ undefined, name, /*typeParameters*/ undefined, heritageClauses, members);
+            ts.setOriginalNode(classExpression, node);
+            ts.setTextRange(classExpression, location);
             //  let ${name} = ${classExpression} where name is either declaredName if the class doesn't contain self-reference
             //                                         or decoratedClassAlias if the class contain self-reference.
-            var transformedClassExpression = ts.createVariableStatement(
-            /*modifiers*/ undefined, ts.createLetDeclarationList([
-                ts.createVariableDeclaration(classAlias || declaredName, 
-                /*type*/ undefined, classExpression)
-            ]), 
-            /*location*/ location);
-            ts.setCommentRange(transformedClassExpression, node);
-            statements.push(ts.setOriginalNode(
-            /*node*/ transformedClassExpression, 
-            /*original*/ node));
-            if (classAlias) {
-                // We emit the class alias as a `let` declaration here so that it has the same
-                // TDZ as the class.
-                // let ${declaredName} = ${decoratedClassAlias}
-                statements.push(ts.setOriginalNode(ts.createVariableStatement(
-                /*modifiers*/ undefined, ts.createLetDeclarationList([
-                    ts.createVariableDeclaration(declaredName, 
-                    /*type*/ undefined, classAlias)
-                ]), 
-                /*location*/ location), 
-                /*original*/ node));
-            }
-            return classAlias;
+            var statement = ts.createVariableStatement(
+            /*modifiers*/ undefined, ts.createVariableDeclarationList([
+                ts.createVariableDeclaration(declName, 
+                /*type*/ undefined, classAlias ? ts.createAssignment(classAlias, classExpression) : classExpression)
+            ], 1 /* Let */));
+            ts.setOriginalNode(statement, node);
+            ts.setTextRange(statement, location);
+            ts.setCommentRange(statement, node);
+            return statement;
         }
         /**
          * Transforms a class expression with TypeScript syntax into compatible ES6.
@@ -45896,11 +54998,12 @@ var ts;
         function visitClassExpression(node) {
             var staticProperties = getInitializedProperties(node, /*isStatic*/ true);
             var heritageClauses = ts.visitNodes(node.heritageClauses, visitor, ts.isHeritageClause);
-            var members = transformClassMembers(node, heritageClauses !== undefined);
-            var classExpression = ts.setOriginalNode(ts.createClassExpression(
+            var members = transformClassMembers(node, ts.some(heritageClauses, function (c) { return c.token === 85 /* ExtendsKeyword */; }));
+            var classExpression = ts.createClassExpression(
             /*modifiers*/ undefined, node.name, 
-            /*typeParameters*/ undefined, heritageClauses, members, 
-            /*location*/ node), node);
+            /*typeParameters*/ undefined, heritageClauses, members);
+            ts.setOriginalNode(classExpression, node);
+            ts.setTextRange(classExpression, node);
             if (staticProperties.length > 0) {
                 var expressions = [];
                 var temp = ts.createTempVariable(hoistVariableDeclaration);
@@ -45911,9 +55014,9 @@ var ts;
                 }
                 // To preserve the behavior of the old emitter, we explicitly indent
                 // the body of a class with static initializers.
-                ts.setEmitFlags(classExpression, 524288 /* Indented */ | ts.getEmitFlags(classExpression));
+                ts.setEmitFlags(classExpression, 65536 /* Indented */ | ts.getEmitFlags(classExpression));
                 expressions.push(ts.startOnNewLine(ts.createAssignment(temp, classExpression)));
-                ts.addRange(expressions, generateInitializedPropertyExpressions(node, staticProperties, temp));
+                ts.addRange(expressions, generateInitializedPropertyExpressions(staticProperties, temp));
                 expressions.push(ts.startOnNewLine(temp));
                 return ts.inlineExpressions(expressions);
             }
@@ -45932,7 +55035,7 @@ var ts;
                 members.push(constructor);
             }
             ts.addRange(members, ts.visitNodes(node.members, classElementVisitor, ts.isClassElement));
-            return ts.createNodeArray(members, /*location*/ node.members);
+            return ts.setTextRange(ts.createNodeArray(members), /*location*/ node.members);
         }
         /**
          * Transforms (or creates) a constructor for a class.
@@ -45945,7 +55048,7 @@ var ts;
             // If there is a property assignment, we need to emit constructor whether users define it or not
             // If there is no property assignment, we can omit constructor if users do not define it
             var hasInstancePropertyWithInitializer = ts.forEach(node.members, isInstanceInitializedProperty);
-            var hasParameterPropertyAssignments = node.transformFlags & 131072 /* ContainsParameterPropertyAssignments */;
+            var hasParameterPropertyAssignments = node.transformFlags & 262144 /* ContainsParameterPropertyAssignments */;
             var constructor = ts.getFirstConstructorWithBody(node);
             // If the class does not contain nodes that require a synthesized constructor,
             // accept the current constructor if it exists.
@@ -45953,14 +55056,13 @@ var ts;
                 return ts.visitEachChild(constructor, visitor, context);
             }
             var parameters = transformConstructorParameters(constructor);
-            var body = transformConstructorBody(node, constructor, hasExtendsClause, parameters);
+            var body = transformConstructorBody(node, constructor, hasExtendsClause);
             //  constructor(${parameters}) {
             //      ${body}
             //  }
-            return ts.startOnNewLine(ts.setOriginalNode(ts.createConstructor(
+            return ts.startOnNewLine(ts.setOriginalNode(ts.setTextRange(ts.createConstructor(
             /*decorators*/ undefined, 
-            /*modifiers*/ undefined, parameters, body, 
-            /*location*/ constructor || node), constructor));
+            /*modifiers*/ undefined, parameters, body), constructor || node), constructor));
         }
         /**
          * Transforms (or creates) the parameters for the constructor of a class with
@@ -45985,9 +55087,8 @@ var ts;
             // downlevel the '...args' portion less efficiently by naively copying the contents of 'arguments' to an array.
             // Instead, we'll avoid using a rest parameter and spread into the super call as
             // 'super(...arguments)' instead of 'super(...args)', as you can see in "transformConstructorBody".
-            return constructor
-                ? ts.visitNodes(constructor.parameters, visitor, ts.isParameter)
-                : [];
+            return ts.visitParameterList(constructor && constructor.parameters, visitor, context)
+                || [];
         }
         /**
          * Transforms (or creates) a constructor body for a class with parameter property
@@ -45996,13 +55097,11 @@ var ts;
          * @param node The current class.
          * @param constructor The current class constructor.
          * @param hasExtendsClause A value indicating whether the class has an extends clause.
-         * @param parameters The transformed parameters for the constructor.
          */
-        function transformConstructorBody(node, constructor, hasExtendsClause, parameters) {
+        function transformConstructorBody(node, constructor, hasExtendsClause) {
             var statements = [];
             var indexOfFirstStatement = 0;
-            // The body of a constructor is a new lexical environment
-            startLexicalEnvironment();
+            resumeLexicalEnvironment();
             if (constructor) {
                 indexOfFirstStatement = addPrologueDirectivesAndInitialSuperCall(constructor, statements);
                 // Add parameters with property assignments. Transforms this:
@@ -46039,16 +55138,17 @@ var ts;
             //  }
             //
             var properties = getInitializedProperties(node, /*isStatic*/ false);
-            addInitializedPropertyStatements(statements, node, properties, ts.createThis());
+            addInitializedPropertyStatements(statements, properties, ts.createThis());
             if (constructor) {
                 // The class already had a constructor, so we should add the existing statements, skipping the initial super call.
                 ts.addRange(statements, ts.visitNodes(constructor.body.statements, visitor, ts.isStatement, indexOfFirstStatement));
             }
             // End the lexical environment.
-            ts.addRange(statements, endLexicalEnvironment());
-            return ts.setMultiLine(ts.createBlock(ts.createNodeArray(statements, 
+            statements = ts.mergeLexicalEnvironment(statements, endLexicalEnvironment());
+            return ts.setTextRange(ts.createBlock(ts.setTextRange(ts.createNodeArray(statements), 
             /*location*/ constructor ? constructor.body.statements : node.members), 
-            /*location*/ constructor ? constructor.body : undefined), true);
+            /*multiLine*/ true), 
+            /*location*/ constructor ? constructor.body : undefined);
         }
         /**
          * Adds super call and preceding prologue directives into the list of statements.
@@ -46060,13 +55160,13 @@ var ts;
             if (ctor.body) {
                 var statements = ctor.body.statements;
                 // add prologue directives to the list (if any)
-                var index = ts.addPrologueDirectives(result, statements, /*ensureUseStrict*/ false, visitor);
+                var index = ts.addPrologue(result, statements, /*ensureUseStrict*/ false, visitor);
                 if (index === statements.length) {
                     // list contains nothing but prologue directives (or empty) - exit
                     return index;
                 }
                 var statement = statements[index];
-                if (statement.kind === 202 /* ExpressionStatement */ && ts.isSuperCallExpression(statement.expression)) {
+                if (statement.kind === 210 /* ExpressionStatement */ && ts.isSuperCall(statement.expression)) {
                     result.push(ts.visitNode(statement, visitor, ts.isStatement));
                     return index + 1;
                 }
@@ -46100,12 +55200,10 @@ var ts;
             ts.Debug.assert(ts.isIdentifier(node.name));
             var name = node.name;
             var propertyName = ts.getMutableClone(name);
-            ts.setEmitFlags(propertyName, 49152 /* NoComments */ | 1536 /* NoSourceMap */);
+            ts.setEmitFlags(propertyName, 1536 /* NoComments */ | 48 /* NoSourceMap */);
             var localName = ts.getMutableClone(name);
-            ts.setEmitFlags(localName, 49152 /* NoComments */);
-            return ts.startOnNewLine(ts.createStatement(ts.createAssignment(ts.createPropertyAccess(ts.createThis(), propertyName, 
-            /*location*/ node.name), localName), 
-            /*location*/ ts.moveRangePos(node, -1)));
+            ts.setEmitFlags(localName, 1536 /* NoComments */);
+            return ts.startOnNewLine(ts.setTextRange(ts.createStatement(ts.createAssignment(ts.setTextRange(ts.createPropertyAccess(ts.createThis(), propertyName), node.name), localName)), ts.moveRangePos(node, -1)));
         }
         /**
          * Gets all property declarations with initializers on either the static or instance side of a class.
@@ -46139,21 +55237,20 @@ var ts;
          * @param isStatic A value indicating whether the member should be a static or instance member.
          */
         function isInitializedProperty(member, isStatic) {
-            return member.kind === 145 /* PropertyDeclaration */
+            return member.kind === 149 /* PropertyDeclaration */
                 && isStatic === ts.hasModifier(member, 32 /* Static */)
                 && member.initializer !== undefined;
         }
         /**
          * Generates assignment statements for property initializers.
          *
-         * @param node The class node.
          * @param properties An array of property declarations to transform.
          * @param receiver The receiver on which each property should be assigned.
          */
-        function addInitializedPropertyStatements(statements, node, properties, receiver) {
-            for (var _i = 0, properties_7 = properties; _i < properties_7.length; _i++) {
-                var property = properties_7[_i];
-                var statement = ts.createStatement(transformInitializedProperty(node, property, receiver));
+        function addInitializedPropertyStatements(statements, properties, receiver) {
+            for (var _i = 0, properties_9 = properties; _i < properties_9.length; _i++) {
+                var property = properties_9[_i];
+                var statement = ts.createStatement(transformInitializedProperty(property, receiver));
                 ts.setSourceMapRange(statement, ts.moveRangePastModifiers(property));
                 ts.setCommentRange(statement, property);
                 statements.push(statement);
@@ -46162,15 +55259,14 @@ var ts;
         /**
          * Generates assignment expressions for property initializers.
          *
-         * @param node The class node.
          * @param properties An array of property declarations to transform.
          * @param receiver The receiver on which each property should be assigned.
          */
-        function generateInitializedPropertyExpressions(node, properties, receiver) {
+        function generateInitializedPropertyExpressions(properties, receiver) {
             var expressions = [];
-            for (var _i = 0, properties_8 = properties; _i < properties_8.length; _i++) {
-                var property = properties_8[_i];
-                var expression = transformInitializedProperty(node, property, receiver);
+            for (var _i = 0, properties_10 = properties; _i < properties_10.length; _i++) {
+                var property = properties_10[_i];
+                var expression = transformInitializedProperty(property, receiver);
                 expression.startsOnNewLine = true;
                 ts.setSourceMapRange(expression, ts.moveRangePastModifiers(property));
                 ts.setCommentRange(expression, property);
@@ -46181,11 +55277,10 @@ var ts;
         /**
          * Transforms a property initializer into an assignment statement.
          *
-         * @param node The class containing the property.
          * @param property The property declaration.
          * @param receiver The object receiving the property assignment.
          */
-        function transformInitializedProperty(node, property, receiver) {
+        function transformInitializedProperty(property, receiver) {
             var propertyName = visitPropertyNameOfClassElement(property);
             var initializer = ts.visitNode(property.initializer, visitor, ts.isExpression);
             var memberAccess = ts.createMemberAccessForPropertyName(receiver, propertyName, /*location*/ propertyName);
@@ -46277,12 +55372,12 @@ var ts;
          */
         function getAllDecoratorsOfClassElement(node, member) {
             switch (member.kind) {
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
+                case 153 /* GetAccessor */:
+                case 154 /* SetAccessor */:
                     return getAllDecoratorsOfAccessors(node, member);
-                case 147 /* MethodDeclaration */:
+                case 151 /* MethodDeclaration */:
                     return getAllDecoratorsOfMethod(member);
-                case 145 /* PropertyDeclaration */:
+                case 149 /* PropertyDeclaration */:
                     return getAllDecoratorsOfProperty(member);
                 default:
                     return undefined;
@@ -46299,10 +55394,11 @@ var ts;
                 return undefined;
             }
             var _a = ts.getAllAccessorDeclarations(node.members, accessor), firstAccessor = _a.firstAccessor, secondAccessor = _a.secondAccessor, setAccessor = _a.setAccessor;
-            if (accessor !== firstAccessor) {
+            var firstAccessorWithDecorators = firstAccessor.decorators ? firstAccessor : secondAccessor && secondAccessor.decorators ? secondAccessor : undefined;
+            if (!firstAccessorWithDecorators || accessor !== firstAccessorWithDecorators) {
                 return undefined;
             }
-            var decorators = firstAccessor.decorators || (secondAccessor && secondAccessor.decorators);
+            var decorators = firstAccessorWithDecorators.decorators;
             var parameters = getDecoratorsOfParameters(setAccessor);
             if (!decorators && !parameters) {
                 return undefined;
@@ -46343,14 +55439,14 @@ var ts;
          * @param node The declaration node.
          * @param allDecorators An object containing all of the decorators for the declaration.
          */
-        function transformAllDecoratorsOfDeclaration(node, allDecorators) {
+        function transformAllDecoratorsOfDeclaration(node, container, allDecorators) {
             if (!allDecorators) {
                 return undefined;
             }
             var decoratorExpressions = [];
             ts.addRange(decoratorExpressions, ts.map(allDecorators.decorators, transformDecorator));
             ts.addRange(decoratorExpressions, ts.flatMap(allDecorators.parameters, transformDecoratorsOfParameter));
-            addTypeMetadata(node, decoratorExpressions);
+            addTypeMetadata(node, container, decoratorExpressions);
             return decoratorExpressions;
         }
         /**
@@ -46375,8 +55471,8 @@ var ts;
         function generateClassElementDecorationExpressions(node, isStatic) {
             var members = getDecoratedClassElements(node, isStatic);
             var expressions;
-            for (var _i = 0, members_2 = members; _i < members_2.length; _i++) {
-                var member = members_2[_i];
+            for (var _i = 0, members_3 = members; _i < members_3.length; _i++) {
+                var member = members_3[_i];
                 var expression = generateClassElementDecorationExpression(node, member);
                 if (expression) {
                     if (!expressions) {
@@ -46397,7 +55493,7 @@ var ts;
          */
         function generateClassElementDecorationExpression(node, member) {
             var allDecorators = getAllDecoratorsOfClassElement(node, member);
-            var decoratorExpressions = transformAllDecoratorsOfDeclaration(member, allDecorators);
+            var decoratorExpressions = transformAllDecoratorsOfDeclaration(member, node, allDecorators);
             if (!decoratorExpressions) {
                 return undefined;
             }
@@ -46417,13 +55513,13 @@ var ts;
             //       __metadata("design:type", Function),
             //       __metadata("design:paramtypes", [Object]),
             //       __metadata("design:returntype", void 0)
-            //   ], C.prototype, "method", undefined);
+            //   ], C.prototype, "method", null);
             //
             // The emit for an accessor is:
             //
             //   __decorate([
             //       dec
-            //   ], C.prototype, "accessor", undefined);
+            //   ], C.prototype, "accessor", null);
             //
             // The emit for a property is:
             //
@@ -46434,12 +55530,12 @@ var ts;
             var prefix = getClassMemberPrefix(node, member);
             var memberName = getExpressionForPropertyName(member, /*generateNameForComputedPropertyName*/ true);
             var descriptor = languageVersion > 0 /* ES3 */
-                ? member.kind === 145 /* PropertyDeclaration */
+                ? member.kind === 149 /* PropertyDeclaration */
                     ? ts.createVoidZero()
                     : ts.createNull()
                 : undefined;
-            var helper = ts.createDecorateHelper(currentSourceFileExternalHelpersModuleName, decoratorExpressions, prefix, memberName, descriptor, ts.moveRangePastDecorators(member));
-            ts.setEmitFlags(helper, 49152 /* NoComments */);
+            var helper = createDecorateHelper(context, decoratorExpressions, prefix, memberName, descriptor, ts.moveRangePastDecorators(member));
+            ts.setEmitFlags(helper, 1536 /* NoComments */);
             return helper;
         }
         /**
@@ -46447,8 +55543,8 @@ var ts;
          *
          * @param node The class node.
          */
-        function addConstructorDecorationStatement(statements, node, decoratedClassAlias) {
-            var expression = generateConstructorDecorationExpression(node, decoratedClassAlias);
+        function addConstructorDecorationStatement(statements, node) {
+            var expression = generateConstructorDecorationExpression(node);
             if (expression) {
                 statements.push(ts.setOriginalNode(ts.createStatement(expression), node));
             }
@@ -46458,33 +55554,19 @@ var ts;
          *
          * @param node The class node.
          */
-        function generateConstructorDecorationExpression(node, decoratedClassAlias) {
+        function generateConstructorDecorationExpression(node) {
             var allDecorators = getAllDecoratorsOfConstructor(node);
-            var decoratorExpressions = transformAllDecoratorsOfDeclaration(node, allDecorators);
+            var decoratorExpressions = transformAllDecoratorsOfDeclaration(node, node, allDecorators);
             if (!decoratorExpressions) {
                 return undefined;
             }
-            // Emit the call to __decorate. Given the class:
-            //
-            //   @dec
-            //   class C {
-            //   }
-            //
-            // The emit for the class is:
-            //
-            //   C = C_1 = __decorate([dec], C);
-            //
-            if (decoratedClassAlias) {
-                var expression = ts.createAssignment(decoratedClassAlias, ts.createDecorateHelper(currentSourceFileExternalHelpersModuleName, decoratorExpressions, getDeclarationName(node)));
-                var result = ts.createAssignment(getDeclarationName(node), expression, ts.moveRangePastDecorators(node));
-                ts.setEmitFlags(result, 49152 /* NoComments */);
-                return result;
-            }
-            else {
-                var result = ts.createAssignment(getDeclarationName(node), ts.createDecorateHelper(currentSourceFileExternalHelpersModuleName, decoratorExpressions, getDeclarationName(node)), ts.moveRangePastDecorators(node));
-                ts.setEmitFlags(result, 49152 /* NoComments */);
-                return result;
-            }
+            var classAlias = classAliases && classAliases[ts.getOriginalNodeId(node)];
+            var localName = ts.getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ true);
+            var decorate = createDecorateHelper(context, decoratorExpressions, localName);
+            var expression = ts.createAssignment(localName, classAlias ? ts.createAssignment(classAlias, decorate) : decorate);
+            ts.setEmitFlags(expression, 1536 /* NoComments */);
+            ts.setSourceMapRange(expression, ts.moveRangePastDecorators(node));
+            return expression;
         }
         /**
          * Transforms a decorator into an expression.
@@ -46506,9 +55588,9 @@ var ts;
                 expressions = [];
                 for (var _i = 0, decorators_1 = decorators; _i < decorators_1.length; _i++) {
                     var decorator = decorators_1[_i];
-                    var helper = ts.createParamHelper(currentSourceFileExternalHelpersModuleName, transformDecorator(decorator), parameterOffset, 
+                    var helper = createParamHelper(context, transformDecorator(decorator), parameterOffset, 
                     /*location*/ decorator.expression);
-                    ts.setEmitFlags(helper, 49152 /* NoComments */);
+                    ts.setEmitFlags(helper, 1536 /* NoComments */);
                     expressions.push(helper);
                 }
             }
@@ -46520,41 +55602,41 @@ var ts;
          * @param node The declaration node.
          * @param decoratorExpressions The destination array to which to add new decorator expressions.
          */
-        function addTypeMetadata(node, decoratorExpressions) {
+        function addTypeMetadata(node, container, decoratorExpressions) {
             if (USE_NEW_TYPE_METADATA_FORMAT) {
-                addNewTypeMetadata(node, decoratorExpressions);
+                addNewTypeMetadata(node, container, decoratorExpressions);
             }
             else {
-                addOldTypeMetadata(node, decoratorExpressions);
+                addOldTypeMetadata(node, container, decoratorExpressions);
             }
         }
-        function addOldTypeMetadata(node, decoratorExpressions) {
+        function addOldTypeMetadata(node, container, decoratorExpressions) {
             if (compilerOptions.emitDecoratorMetadata) {
                 if (shouldAddTypeMetadata(node)) {
-                    decoratorExpressions.push(ts.createMetadataHelper(currentSourceFileExternalHelpersModuleName, "design:type", serializeTypeOfNode(node)));
+                    decoratorExpressions.push(createMetadataHelper(context, "design:type", serializeTypeOfNode(node)));
                 }
                 if (shouldAddParamTypesMetadata(node)) {
-                    decoratorExpressions.push(ts.createMetadataHelper(currentSourceFileExternalHelpersModuleName, "design:paramtypes", serializeParameterTypesOfNode(node)));
+                    decoratorExpressions.push(createMetadataHelper(context, "design:paramtypes", serializeParameterTypesOfNode(node, container)));
                 }
                 if (shouldAddReturnTypeMetadata(node)) {
-                    decoratorExpressions.push(ts.createMetadataHelper(currentSourceFileExternalHelpersModuleName, "design:returntype", serializeReturnTypeOfNode(node)));
+                    decoratorExpressions.push(createMetadataHelper(context, "design:returntype", serializeReturnTypeOfNode(node)));
                 }
             }
         }
-        function addNewTypeMetadata(node, decoratorExpressions) {
+        function addNewTypeMetadata(node, container, decoratorExpressions) {
             if (compilerOptions.emitDecoratorMetadata) {
                 var properties = void 0;
                 if (shouldAddTypeMetadata(node)) {
-                    (properties || (properties = [])).push(ts.createPropertyAssignment("type", ts.createArrowFunction(/*modifiers*/ undefined, /*typeParameters*/ undefined, [], /*type*/ undefined, /*equalsGreaterThanToken*/ undefined, serializeTypeOfNode(node))));
+                    (properties || (properties = [])).push(ts.createPropertyAssignment("type", ts.createArrowFunction(/*modifiers*/ undefined, /*typeParameters*/ undefined, [], /*type*/ undefined, ts.createToken(36 /* EqualsGreaterThanToken */), serializeTypeOfNode(node))));
                 }
                 if (shouldAddParamTypesMetadata(node)) {
-                    (properties || (properties = [])).push(ts.createPropertyAssignment("paramTypes", ts.createArrowFunction(/*modifiers*/ undefined, /*typeParameters*/ undefined, [], /*type*/ undefined, /*equalsGreaterThanToken*/ undefined, serializeParameterTypesOfNode(node))));
+                    (properties || (properties = [])).push(ts.createPropertyAssignment("paramTypes", ts.createArrowFunction(/*modifiers*/ undefined, /*typeParameters*/ undefined, [], /*type*/ undefined, ts.createToken(36 /* EqualsGreaterThanToken */), serializeParameterTypesOfNode(node, container))));
                 }
                 if (shouldAddReturnTypeMetadata(node)) {
-                    (properties || (properties = [])).push(ts.createPropertyAssignment("returnType", ts.createArrowFunction(/*modifiers*/ undefined, /*typeParameters*/ undefined, [], /*type*/ undefined, /*equalsGreaterThanToken*/ undefined, serializeReturnTypeOfNode(node))));
+                    (properties || (properties = [])).push(ts.createPropertyAssignment("returnType", ts.createArrowFunction(/*modifiers*/ undefined, /*typeParameters*/ undefined, [], /*type*/ undefined, ts.createToken(36 /* EqualsGreaterThanToken */), serializeReturnTypeOfNode(node))));
                 }
                 if (properties) {
-                    decoratorExpressions.push(ts.createMetadataHelper(currentSourceFileExternalHelpersModuleName, "design:typeinfo", ts.createObjectLiteral(properties, /*location*/ undefined, /*multiLine*/ true)));
+                    decoratorExpressions.push(createMetadataHelper(context, "design:typeinfo", ts.createObjectLiteral(properties, /*multiLine*/ true)));
                 }
             }
         }
@@ -46567,10 +55649,10 @@ var ts;
          */
         function shouldAddTypeMetadata(node) {
             var kind = node.kind;
-            return kind === 147 /* MethodDeclaration */
-                || kind === 149 /* GetAccessor */
-                || kind === 150 /* SetAccessor */
-                || kind === 145 /* PropertyDeclaration */;
+            return kind === 151 /* MethodDeclaration */
+                || kind === 153 /* GetAccessor */
+                || kind === 154 /* SetAccessor */
+                || kind === 149 /* PropertyDeclaration */;
         }
         /**
          * Determines whether to emit the "design:returntype" metadata based on the node's kind.
@@ -46580,7 +55662,7 @@ var ts;
          * @param node The node to test.
          */
         function shouldAddReturnTypeMetadata(node) {
-            return node.kind === 147 /* MethodDeclaration */;
+            return node.kind === 151 /* MethodDeclaration */;
         }
         /**
          * Determines whether to emit the "design:paramtypes" metadata based on the node's kind.
@@ -46590,12 +55672,16 @@ var ts;
          * @param node The node to test.
          */
         function shouldAddParamTypesMetadata(node) {
-            var kind = node.kind;
-            return kind === 221 /* ClassDeclaration */
-                || kind === 192 /* ClassExpression */
-                || kind === 147 /* MethodDeclaration */
-                || kind === 149 /* GetAccessor */
-                || kind === 150 /* SetAccessor */;
+            switch (node.kind) {
+                case 229 /* ClassDeclaration */:
+                case 199 /* ClassExpression */:
+                    return ts.getFirstConstructorWithBody(node) !== undefined;
+                case 151 /* MethodDeclaration */:
+                case 153 /* GetAccessor */:
+                case 154 /* SetAccessor */:
+                    return true;
+            }
+            return false;
         }
         /**
          * Serializes the type of a node for use with decorator type metadata.
@@ -46604,43 +55690,26 @@ var ts;
          */
         function serializeTypeOfNode(node) {
             switch (node.kind) {
-                case 145 /* PropertyDeclaration */:
-                case 142 /* Parameter */:
-                case 149 /* GetAccessor */:
+                case 149 /* PropertyDeclaration */:
+                case 146 /* Parameter */:
+                case 153 /* GetAccessor */:
                     return serializeTypeNode(node.type);
-                case 150 /* SetAccessor */:
+                case 154 /* SetAccessor */:
                     return serializeTypeNode(ts.getSetAccessorTypeAnnotationNode(node));
-                case 221 /* ClassDeclaration */:
-                case 192 /* ClassExpression */:
-                case 147 /* MethodDeclaration */:
+                case 229 /* ClassDeclaration */:
+                case 199 /* ClassExpression */:
+                case 151 /* MethodDeclaration */:
                     return ts.createIdentifier("Function");
                 default:
                     return ts.createVoidZero();
             }
         }
-        /**
-         * Gets the most likely element type for a TypeNode. This is not an exhaustive test
-         * as it assumes a rest argument can only be an array type (either T[], or Array<T>).
-         *
-         * @param node The type node.
-         */
-        function getRestParameterElementType(node) {
-            if (node && node.kind === 160 /* ArrayType */) {
-                return node.elementType;
-            }
-            else if (node && node.kind === 155 /* TypeReference */) {
-                return ts.singleOrUndefined(node.typeArguments);
-            }
-            else {
-                return undefined;
-            }
-        }
         /**
          * Serializes the types of the parameters of a node for use with decorator type metadata.
          *
          * @param node The node that should have its parameter types serialized.
          */
-        function serializeParameterTypesOfNode(node) {
+        function serializeParameterTypesOfNode(node, container) {
             var valueDeclaration = ts.isClassLike(node)
                 ? ts.getFirstConstructorWithBody(node)
                 : ts.isFunctionLike(node) && ts.nodeIsPresent(node.body)
@@ -46648,7 +55717,7 @@ var ts;
                     : undefined;
             var expressions = [];
             if (valueDeclaration) {
-                var parameters = valueDeclaration.parameters;
+                var parameters = getParametersOfDecoratedDeclaration(valueDeclaration, container);
                 var numParameters = parameters.length;
                 for (var i = 0; i < numParameters; i++) {
                     var parameter = parameters[i];
@@ -46656,7 +55725,7 @@ var ts;
                         continue;
                     }
                     if (parameter.dotDotDotToken) {
-                        expressions.push(serializeTypeNode(getRestParameterElementType(parameter.type)));
+                        expressions.push(serializeTypeNode(ts.getRestParameterElementType(parameter.type)));
                     }
                     else {
                         expressions.push(serializeTypeOfNode(parameter));
@@ -46665,6 +55734,15 @@ var ts;
             }
             return ts.createArrayLiteral(expressions);
         }
+        function getParametersOfDecoratedDeclaration(node, container) {
+            if (container && node.kind === 153 /* GetAccessor */) {
+                var setAccessor = ts.getAllAccessorDeclarations(container.members, node).setAccessor;
+                if (setAccessor) {
+                    return setAccessor.parameters;
+                }
+            }
+            return node.parameters;
+        }
         /**
          * Serializes the return type of a node for use with decorator type metadata.
          *
@@ -46674,7 +55752,7 @@ var ts;
             if (ts.isFunctionLike(node) && node.type) {
                 return serializeTypeNode(node.type);
             }
-            else if (ts.isAsyncFunctionLike(node)) {
+            else if (ts.isAsyncFunction(node)) {
                 return ts.createIdentifier("Promise");
             }
             return ts.createVoidZero();
@@ -46702,49 +55780,58 @@ var ts;
                 return ts.createIdentifier("Object");
             }
             switch (node.kind) {
-                case 103 /* VoidKeyword */:
+                case 105 /* VoidKeyword */:
+                case 139 /* UndefinedKeyword */:
+                case 95 /* NullKeyword */:
+                case 130 /* NeverKeyword */:
                     return ts.createVoidZero();
-                case 164 /* ParenthesizedType */:
+                case 168 /* ParenthesizedType */:
                     return serializeTypeNode(node.type);
-                case 156 /* FunctionType */:
-                case 157 /* ConstructorType */:
+                case 160 /* FunctionType */:
+                case 161 /* ConstructorType */:
                     return ts.createIdentifier("Function");
-                case 160 /* ArrayType */:
-                case 161 /* TupleType */:
+                case 164 /* ArrayType */:
+                case 165 /* TupleType */:
                     return ts.createIdentifier("Array");
-                case 154 /* TypePredicate */:
-                case 120 /* BooleanKeyword */:
+                case 158 /* TypePredicate */:
+                case 122 /* BooleanKeyword */:
                     return ts.createIdentifier("Boolean");
-                case 132 /* StringKeyword */:
+                case 136 /* StringKeyword */:
                     return ts.createIdentifier("String");
-                case 166 /* LiteralType */:
+                case 134 /* ObjectKeyword */:
+                    return ts.createIdentifier("Object");
+                case 173 /* LiteralType */:
                     switch (node.literal.kind) {
                         case 9 /* StringLiteral */:
                             return ts.createIdentifier("String");
                         case 8 /* NumericLiteral */:
                             return ts.createIdentifier("Number");
-                        case 99 /* TrueKeyword */:
-                        case 84 /* FalseKeyword */:
+                        case 101 /* TrueKeyword */:
+                        case 86 /* FalseKeyword */:
                             return ts.createIdentifier("Boolean");
                         default:
                             ts.Debug.failBadSyntaxKind(node.literal);
                             break;
                     }
                     break;
-                case 130 /* NumberKeyword */:
+                case 133 /* NumberKeyword */:
                     return ts.createIdentifier("Number");
-                case 133 /* SymbolKeyword */:
-                    return languageVersion < 2 /* ES6 */
+                case 137 /* SymbolKeyword */:
+                    return languageVersion < 2 /* ES2015 */
                         ? getGlobalSymbolNameWithFallback()
                         : ts.createIdentifier("Symbol");
-                case 155 /* TypeReference */:
+                case 159 /* TypeReference */:
                     return serializeTypeReferenceNode(node);
-                case 158 /* TypeQuery */:
-                case 159 /* TypeLiteral */:
-                case 162 /* UnionType */:
-                case 163 /* IntersectionType */:
-                case 117 /* AnyKeyword */:
-                case 165 /* ThisType */:
+                case 167 /* IntersectionType */:
+                case 166 /* UnionType */:
+                    return serializeUnionOrIntersectionType(node);
+                case 162 /* TypeQuery */:
+                case 170 /* TypeOperator */:
+                case 171 /* IndexedAccessType */:
+                case 172 /* MappedType */:
+                case 163 /* TypeLiteral */:
+                case 119 /* AnyKeyword */:
+                case 169 /* ThisType */:
                     break;
                 default:
                     ts.Debug.failBadSyntaxKind(node);
@@ -46752,6 +55839,33 @@ var ts;
             }
             return ts.createIdentifier("Object");
         }
+        function serializeUnionOrIntersectionType(node) {
+            // Note when updating logic here also update getEntityNameForDecoratorMetadata
+            // so that aliases can be marked as referenced
+            var serializedUnion;
+            for (var _i = 0, _a = node.types; _i < _a.length; _i++) {
+                var typeNode = _a[_i];
+                var serializedIndividual = serializeTypeNode(typeNode);
+                if (ts.isIdentifier(serializedIndividual) && serializedIndividual.text === "Object") {
+                    // One of the individual is global object, return immediately
+                    return serializedIndividual;
+                }
+                else if (serializedUnion) {
+                    // Different types
+                    if (!ts.isIdentifier(serializedUnion) ||
+                        !ts.isIdentifier(serializedIndividual) ||
+                        serializedUnion.text !== serializedIndividual.text) {
+                        return ts.createIdentifier("Object");
+                    }
+                }
+                else {
+                    // Initialize the union type
+                    serializedUnion = serializedIndividual;
+                }
+            }
+            // If we were able to find common type, use it
+            return serializedUnion;
+        }
         /**
          * Serializes a TypeReferenceNode to an appropriate JS constructor value for use with
          * decorator type metadata.
@@ -46763,7 +55877,7 @@ var ts;
                 case ts.TypeReferenceSerializationKind.Unknown:
                     var serialized = serializeEntityNameAsExpression(node.typeName, /*useFallback*/ true);
                     var temp = ts.createTempVariable(hoistVariableDeclaration);
-                    return ts.createLogicalOr(ts.createLogicalAnd(ts.createStrictEquality(ts.createTypeOf(ts.createAssignment(temp, serialized)), ts.createLiteral("function")), temp), ts.createIdentifier("Object"));
+                    return ts.createLogicalOr(ts.createLogicalAnd(ts.createTypeCheck(ts.createAssignment(temp, serialized), "function"), temp), ts.createIdentifier("Object"));
                 case ts.TypeReferenceSerializationKind.TypeWithConstructSignatureAndValue:
                     return serializeEntityNameAsExpression(node.typeName, /*useFallback*/ false);
                 case ts.TypeReferenceSerializationKind.VoidNullableOrNeverType:
@@ -46777,7 +55891,7 @@ var ts;
                 case ts.TypeReferenceSerializationKind.ArrayLikeType:
                     return ts.createIdentifier("Array");
                 case ts.TypeReferenceSerializationKind.ESSymbolType:
-                    return languageVersion < 2 /* ES6 */
+                    return languageVersion < 2 /* ES2015 */
                         ? getGlobalSymbolNameWithFallback()
                         : ts.createIdentifier("Symbol");
                 case ts.TypeReferenceSerializationKind.TypeWithCallSignature:
@@ -46798,18 +55912,18 @@ var ts;
          */
         function serializeEntityNameAsExpression(node, useFallback) {
             switch (node.kind) {
-                case 69 /* Identifier */:
+                case 71 /* Identifier */:
                     // Create a clone of the name with a new parent, and treat it as if it were
                     // a source tree node for the purposes of the checker.
-                    var name_30 = ts.getMutableClone(node);
-                    name_30.flags &= ~8 /* Synthesized */;
-                    name_30.original = undefined;
-                    name_30.parent = currentScope;
+                    var name_47 = ts.getMutableClone(node);
+                    name_47.flags &= ~8 /* Synthesized */;
+                    name_47.original = undefined;
+                    name_47.parent = currentScope;
                     if (useFallback) {
-                        return ts.createLogicalAnd(ts.createStrictInequality(ts.createTypeOf(name_30), ts.createLiteral("undefined")), name_30);
+                        return ts.createLogicalAnd(ts.createStrictInequality(ts.createTypeOf(name_47), ts.createLiteral("undefined")), name_47);
                     }
-                    return name_30;
-                case 139 /* QualifiedName */:
+                    return name_47;
+                case 143 /* QualifiedName */:
                     return serializeQualifiedNameAsExpression(node, useFallback);
             }
         }
@@ -46822,7 +55936,7 @@ var ts;
          */
         function serializeQualifiedNameAsExpression(node, useFallback) {
             var left;
-            if (node.left.kind === 69 /* Identifier */) {
+            if (node.left.kind === 71 /* Identifier */) {
                 left = serializeEntityNameAsExpression(node.left, useFallback);
             }
             else if (useFallback) {
@@ -46839,7 +55953,7 @@ var ts;
          * available.
          */
         function getGlobalSymbolNameWithFallback() {
-            return ts.createConditional(ts.createStrictEquality(ts.createTypeOf(ts.createIdentifier("Symbol")), ts.createLiteral("function")), ts.createToken(53 /* QuestionToken */), ts.createIdentifier("Symbol"), ts.createToken(54 /* ColonToken */), ts.createIdentifier("Object"));
+            return ts.createConditional(ts.createTypeCheck(ts.createIdentifier("Symbol"), "function"), ts.createIdentifier("Symbol"), ts.createIdentifier("Object"));
         }
         /**
          * Gets an expression that represents a property name. For a computed property, a
@@ -46855,7 +55969,7 @@ var ts;
                     : name.expression;
             }
             else if (ts.isIdentifier(name)) {
-                return ts.createLiteral(name.text);
+                return ts.createLiteral(ts.unescapeIdentifier(name.text));
             }
             else {
                 return ts.getSynthesizedClone(name);
@@ -46877,7 +55991,7 @@ var ts;
                     hoistVariableDeclaration(generatedName);
                     expression = ts.createAssignment(generatedName, expression);
                 }
-                return ts.setOriginalNode(ts.createComputedPropertyName(expression, /*location*/ name), name);
+                return ts.updateComputedPropertyName(name, expression);
             }
             else {
                 return name;
@@ -46893,9 +56007,9 @@ var ts;
          * @param node The HeritageClause to transform.
          */
         function visitHeritageClause(node) {
-            if (node.token === 83 /* ExtendsKeyword */) {
+            if (node.token === 85 /* ExtendsKeyword */) {
                 var types = ts.visitNodes(node.types, visitor, ts.isExpressionWithTypeArguments, 0, 1);
-                return ts.createHeritageClause(83 /* ExtendsKeyword */, types, node);
+                return ts.setTextRange(ts.createHeritageClause(85 /* ExtendsKeyword */, types), node);
             }
             return undefined;
         }
@@ -46908,9 +56022,8 @@ var ts;
          * @param node The ExpressionWithTypeArguments to transform.
          */
         function visitExpressionWithTypeArguments(node) {
-            var expression = ts.visitNode(node.expression, visitor, ts.isLeftHandSideExpression);
-            return ts.createExpressionWithTypeArguments(
-            /*typeArguments*/ undefined, expression, node);
+            return ts.updateExpressionWithTypeArguments(node, 
+            /*typeArguments*/ undefined, ts.visitNode(node.expression, visitor, ts.isLeftHandSideExpression));
         }
         /**
          * Determines whether to emit a function-like declaration. We should not emit the
@@ -46921,12 +56034,18 @@ var ts;
         function shouldEmitFunctionLikeDeclaration(node) {
             return !ts.nodeIsMissing(node.body);
         }
+        function visitConstructor(node) {
+            if (!shouldEmitFunctionLikeDeclaration(node)) {
+                return undefined;
+            }
+            return ts.updateConstructor(node, ts.visitNodes(node.decorators, visitor, ts.isDecorator), ts.visitNodes(node.modifiers, visitor, ts.isModifier), ts.visitParameterList(node.parameters, visitor, context), ts.visitFunctionBody(node.body, visitor, context));
+        }
         /**
          * Visits a method declaration of a class.
          *
          * This function will be called when one of the following conditions are met:
          * - The node is an overload
-         * - The node is marked as abstract, async, public, private, protected, or readonly
+         * - The node is marked as abstract, public, private, protected, or readonly
          * - The node has both a decorator and a computed property name
          *
          * @param node The method node.
@@ -46935,17 +56054,18 @@ var ts;
             if (!shouldEmitFunctionLikeDeclaration(node)) {
                 return undefined;
             }
-            var method = ts.createMethod(
-            /*decorators*/ undefined, ts.visitNodes(node.modifiers, visitor, ts.isModifier), node.asteriskToken, visitPropertyNameOfClassElement(node), 
-            /*typeParameters*/ undefined, ts.visitNodes(node.parameters, visitor, ts.isParameter), 
-            /*type*/ undefined, transformFunctionBody(node), 
-            /*location*/ node);
-            // While we emit the source map for the node after skipping decorators and modifiers,
-            // we need to emit the comments for the original range.
-            ts.setCommentRange(method, node);
-            ts.setSourceMapRange(method, ts.moveRangePastDecorators(node));
-            ts.setOriginalNode(method, node);
-            return method;
+            var updated = ts.updateMethod(node, 
+            /*decorators*/ undefined, ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), node.asteriskToken, visitPropertyNameOfClassElement(node), 
+            /*questionToken*/ undefined, 
+            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
+            /*type*/ undefined, ts.visitFunctionBody(node.body, visitor, context));
+            if (updated !== node) {
+                // While we emit the source map for the node after skipping decorators and modifiers,
+                // we need to emit the comments for the original range.
+                ts.setCommentRange(updated, node);
+                ts.setSourceMapRange(updated, ts.moveRangePastDecorators(node));
+            }
+            return updated;
         }
         /**
          * Determines whether to emit an accessor declaration. We should not emit the
@@ -46969,16 +56089,16 @@ var ts;
             if (!shouldEmitAccessorDeclaration(node)) {
                 return undefined;
             }
-            var accessor = ts.createGetAccessor(
-            /*decorators*/ undefined, ts.visitNodes(node.modifiers, visitor, ts.isModifier), visitPropertyNameOfClassElement(node), ts.visitNodes(node.parameters, visitor, ts.isParameter), 
-            /*type*/ undefined, node.body ? ts.visitEachChild(node.body, visitor, context) : ts.createBlock([]), 
-            /*location*/ node);
-            // While we emit the source map for the node after skipping decorators and modifiers,
-            // we need to emit the comments for the original range.
-            ts.setCommentRange(accessor, node);
-            ts.setSourceMapRange(accessor, ts.moveRangePastDecorators(node));
-            ts.setOriginalNode(accessor, node);
-            return accessor;
+            var updated = ts.updateGetAccessor(node, 
+            /*decorators*/ undefined, ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), visitPropertyNameOfClassElement(node), ts.visitParameterList(node.parameters, visitor, context), 
+            /*type*/ undefined, ts.visitFunctionBody(node.body, visitor, context) || ts.createBlock([]));
+            if (updated !== node) {
+                // While we emit the source map for the node after skipping decorators and modifiers,
+                // we need to emit the comments for the original range.
+                ts.setCommentRange(updated, node);
+                ts.setSourceMapRange(updated, ts.moveRangePastDecorators(node));
+            }
+            return updated;
         }
         /**
          * Visits a set accessor declaration of a class.
@@ -46993,23 +56113,23 @@ var ts;
             if (!shouldEmitAccessorDeclaration(node)) {
                 return undefined;
             }
-            var accessor = ts.createSetAccessor(
-            /*decorators*/ undefined, ts.visitNodes(node.modifiers, visitor, ts.isModifier), visitPropertyNameOfClassElement(node), ts.visitNodes(node.parameters, visitor, ts.isParameter), node.body ? ts.visitEachChild(node.body, visitor, context) : ts.createBlock([]), 
-            /*location*/ node);
-            // While we emit the source map for the node after skipping decorators and modifiers,
-            // we need to emit the comments for the original range.
-            ts.setCommentRange(accessor, node);
-            ts.setSourceMapRange(accessor, ts.moveRangePastDecorators(node));
-            ts.setOriginalNode(accessor, node);
-            return accessor;
+            var updated = ts.updateSetAccessor(node, 
+            /*decorators*/ undefined, ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), visitPropertyNameOfClassElement(node), ts.visitParameterList(node.parameters, visitor, context), ts.visitFunctionBody(node.body, visitor, context) || ts.createBlock([]));
+            if (updated !== node) {
+                // While we emit the source map for the node after skipping decorators and modifiers,
+                // we need to emit the comments for the original range.
+                ts.setCommentRange(updated, node);
+                ts.setSourceMapRange(updated, ts.moveRangePastDecorators(node));
+            }
+            return updated;
         }
         /**
          * Visits a function declaration.
          *
          * This function will be called when one of the following conditions are met:
          * - The node is an overload
-         * - The node is marked async
          * - The node is exported from a TypeScript namespace
+         * - The node has decorators
          *
          * @param node The function node.
          */
@@ -47017,136 +56137,44 @@ var ts;
             if (!shouldEmitFunctionLikeDeclaration(node)) {
                 return ts.createNotEmittedStatement(node);
             }
-            var func = ts.createFunctionDeclaration(
-            /*decorators*/ undefined, ts.visitNodes(node.modifiers, visitor, ts.isModifier), node.asteriskToken, node.name, 
-            /*typeParameters*/ undefined, ts.visitNodes(node.parameters, visitor, ts.isParameter), 
-            /*type*/ undefined, transformFunctionBody(node), 
-            /*location*/ node);
-            ts.setOriginalNode(func, node);
-            if (isNamespaceExport(node)) {
-                var statements = [func];
+            var updated = ts.updateFunctionDeclaration(node, 
+            /*decorators*/ undefined, ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), node.asteriskToken, node.name, 
+            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
+            /*type*/ undefined, ts.visitFunctionBody(node.body, visitor, context) || ts.createBlock([]));
+            if (isExportOfNamespace(node)) {
+                var statements = [updated];
                 addExportMemberAssignment(statements, node);
                 return statements;
             }
-            return func;
+            return updated;
         }
         /**
          * Visits a function expression node.
          *
          * This function will be called when one of the following conditions are met:
-         * - The node is marked async
+         * - The node has type annotations
          *
          * @param node The function expression node.
          */
         function visitFunctionExpression(node) {
-            if (ts.nodeIsMissing(node.body)) {
+            if (!shouldEmitFunctionLikeDeclaration(node)) {
                 return ts.createOmittedExpression();
             }
-            var func = ts.createFunctionExpression(node.asteriskToken, node.name, 
-            /*typeParameters*/ undefined, ts.visitNodes(node.parameters, visitor, ts.isParameter), 
-            /*type*/ undefined, transformFunctionBody(node), 
-            /*location*/ node);
-            ts.setOriginalNode(func, node);
-            return func;
+            var updated = ts.updateFunctionExpression(node, ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), node.asteriskToken, node.name, 
+            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
+            /*type*/ undefined, ts.visitFunctionBody(node.body, visitor, context) || ts.createBlock([]));
+            return updated;
         }
         /**
          * @remarks
          * This function will be called when one of the following conditions are met:
-         * - The node is marked async
+         * - The node has type annotations
          */
         function visitArrowFunction(node) {
-            var func = ts.createArrowFunction(
-            /*modifiers*/ undefined, 
-            /*typeParameters*/ undefined, ts.visitNodes(node.parameters, visitor, ts.isParameter), 
-            /*type*/ undefined, node.equalsGreaterThanToken, transformConciseBody(node), 
-            /*location*/ node);
-            ts.setOriginalNode(func, node);
-            return func;
-        }
-        function transformFunctionBody(node) {
-            if (ts.isAsyncFunctionLike(node)) {
-                return transformAsyncFunctionBody(node);
-            }
-            return transformFunctionBodyWorker(node.body);
-        }
-        function transformFunctionBodyWorker(body, start) {
-            if (start === void 0) { start = 0; }
-            var savedCurrentScope = currentScope;
-            currentScope = body;
-            startLexicalEnvironment();
-            var statements = ts.visitNodes(body.statements, visitor, ts.isStatement, start);
-            var visited = ts.updateBlock(body, statements);
-            var declarations = endLexicalEnvironment();
-            currentScope = savedCurrentScope;
-            return ts.mergeFunctionBodyLexicalEnvironment(visited, declarations);
-        }
-        function transformConciseBody(node) {
-            if (ts.isAsyncFunctionLike(node)) {
-                return transformAsyncFunctionBody(node);
-            }
-            return transformConciseBodyWorker(node.body, /*forceBlockFunctionBody*/ false);
-        }
-        function transformConciseBodyWorker(body, forceBlockFunctionBody) {
-            if (ts.isBlock(body)) {
-                return transformFunctionBodyWorker(body);
-            }
-            else {
-                startLexicalEnvironment();
-                var visited = ts.visitNode(body, visitor, ts.isConciseBody);
-                var declarations = endLexicalEnvironment();
-                var merged = ts.mergeFunctionBodyLexicalEnvironment(visited, declarations);
-                if (forceBlockFunctionBody && !ts.isBlock(merged)) {
-                    return ts.createBlock([
-                        ts.createReturn(merged)
-                    ]);
-                }
-                else {
-                    return merged;
-                }
-            }
-        }
-        function getPromiseConstructor(type) {
-            var typeName = ts.getEntityNameFromTypeNode(type);
-            if (typeName && ts.isEntityName(typeName)) {
-                var serializationKind = resolver.getTypeReferenceSerializationKind(typeName);
-                if (serializationKind === ts.TypeReferenceSerializationKind.TypeWithConstructSignatureAndValue
-                    || serializationKind === ts.TypeReferenceSerializationKind.Unknown) {
-                    return typeName;
-                }
-            }
-            return undefined;
-        }
-        function transformAsyncFunctionBody(node) {
-            var promiseConstructor = languageVersion < 2 /* ES6 */ ? getPromiseConstructor(node.type) : undefined;
-            var isArrowFunction = node.kind === 180 /* ArrowFunction */;
-            var hasLexicalArguments = (resolver.getNodeCheckFlags(node) & 8192 /* CaptureArguments */) !== 0;
-            // An async function is emit as an outer function that calls an inner
-            // generator function. To preserve lexical bindings, we pass the current
-            // `this` and `arguments` objects to `__awaiter`. The generator function
-            // passed to `__awaiter` is executed inside of the callback to the
-            // promise constructor.
-            if (!isArrowFunction) {
-                var statements = [];
-                var statementOffset = ts.addPrologueDirectives(statements, node.body.statements, /*ensureUseStrict*/ false, visitor);
-                statements.push(ts.createReturn(ts.createAwaiterHelper(currentSourceFileExternalHelpersModuleName, hasLexicalArguments, promiseConstructor, transformFunctionBodyWorker(node.body, statementOffset))));
-                var block = ts.createBlock(statements, /*location*/ node.body, /*multiLine*/ true);
-                // Minor optimization, emit `_super` helper to capture `super` access in an arrow.
-                // This step isn't needed if we eventually transform this to ES5.
-                if (languageVersion >= 2 /* ES6 */) {
-                    if (resolver.getNodeCheckFlags(node) & 4096 /* AsyncMethodWithSuperBinding */) {
-                        enableSubstitutionForAsyncMethodsWithSuper();
-                        ts.setEmitFlags(block, 8 /* EmitAdvancedSuperHelper */);
-                    }
-                    else if (resolver.getNodeCheckFlags(node) & 2048 /* AsyncMethodWithSuper */) {
-                        enableSubstitutionForAsyncMethodsWithSuper();
-                        ts.setEmitFlags(block, 4 /* EmitSuperHelper */);
-                    }
-                }
-                return block;
-            }
-            else {
-                return ts.createAwaiterHelper(currentSourceFileExternalHelpersModuleName, hasLexicalArguments, promiseConstructor, transformConciseBodyWorker(node.body, /*forceBlockFunctionBody*/ true));
-            }
+            var updated = ts.updateArrowFunction(node, ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), 
+            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
+            /*type*/ undefined, ts.visitFunctionBody(node.body, visitor, context));
+            return updated;
         }
         /**
          * Visits a parameter declaration node.
@@ -47159,21 +56187,21 @@ var ts;
          * @param node The parameter declaration node.
          */
         function visitParameter(node) {
-            if (node.name && ts.isIdentifier(node.name) && node.name.originalKeywordKind === 97 /* ThisKeyword */) {
+            if (ts.parameterIsThisKeyword(node)) {
                 return undefined;
             }
-            var parameter = ts.createParameterDeclaration(
+            var parameter = ts.createParameter(
             /*decorators*/ undefined, 
             /*modifiers*/ undefined, node.dotDotDotToken, ts.visitNode(node.name, visitor, ts.isBindingName), 
             /*questionToken*/ undefined, 
-            /*type*/ undefined, ts.visitNode(node.initializer, visitor, ts.isExpression), 
-            /*location*/ ts.moveRangePastModifiers(node));
+            /*type*/ undefined, ts.visitNode(node.initializer, visitor, ts.isExpression));
             // While we emit the source map for the node after skipping decorators and modifiers,
             // we need to emit the comments for the original range.
             ts.setOriginalNode(parameter, node);
+            ts.setTextRange(parameter, ts.moveRangePastModifiers(node));
             ts.setCommentRange(parameter, node);
             ts.setSourceMapRange(parameter, ts.moveRangePastModifiers(node));
-            ts.setEmitFlags(parameter.name, 1024 /* NoTrailingSourceMap */);
+            ts.setEmitFlags(parameter.name, 32 /* NoTrailingSourceMap */);
             return parameter;
         }
         /**
@@ -47183,14 +56211,13 @@ var ts;
          * - The node is exported from a TypeScript namespace.
          */
         function visitVariableStatement(node) {
-            if (isNamespaceExport(node)) {
+            if (isExportOfNamespace(node)) {
                 var variables = ts.getInitializedVariables(node.declarationList);
                 if (variables.length === 0) {
                     // elide statement if there are no initialized variables.
                     return undefined;
                 }
-                return ts.createStatement(ts.inlineExpressions(ts.map(variables, transformInitializedVariable)), 
-                /*location*/ node);
+                return ts.setTextRange(ts.createStatement(ts.inlineExpressions(ts.map(variables, transformInitializedVariable))), node);
             }
             else {
                 return ts.visitEachChild(node, visitor, context);
@@ -47199,24 +56226,17 @@ var ts;
         function transformInitializedVariable(node) {
             var name = node.name;
             if (ts.isBindingPattern(name)) {
-                return ts.flattenVariableDestructuringToExpression(context, node, hoistVariableDeclaration, getNamespaceMemberNameWithSourceMapsAndWithoutComments, visitor);
+                return ts.flattenDestructuringAssignment(node, visitor, context, 0 /* All */, 
+                /*needsValue*/ false, createNamespaceExportExpression);
             }
             else {
-                return ts.createAssignment(getNamespaceMemberNameWithSourceMapsAndWithoutComments(name), ts.visitNode(node.initializer, visitor, ts.isExpression), 
+                return ts.setTextRange(ts.createAssignment(getNamespaceMemberNameWithSourceMapsAndWithoutComments(name), ts.visitNode(node.initializer, visitor, ts.isExpression)), 
                 /*location*/ node);
             }
         }
-        /**
-         * Visits an await expression.
-         *
-         * This function will be called any time a TypeScript await expression is encountered.
-         *
-         * @param node The await expression node.
-         */
-        function visitAwaitExpression(node) {
-            return ts.setOriginalNode(ts.createYield(
-            /*asteriskToken*/ undefined, ts.visitNode(node.expression, visitor, ts.isExpression), 
-            /*location*/ node), node);
+        function visitVariableDeclaration(node) {
+            return ts.updateVariableDeclaration(node, ts.visitNode(node.name, visitor, ts.isBindingName), 
+            /*type*/ undefined, ts.visitNode(node.initializer, visitor, ts.isExpression));
         }
         /**
          * Visits a parenthesized expression that contains either a type assertion or an `as`
@@ -47236,13 +56256,13 @@ var ts;
                 // code if the casted expression has a lower precedence than the rest of the
                 // expression.
                 //
+                // To preserve comments, we return a "PartiallyEmittedExpression" here which will
+                // preserve the position information of the original expression.
+                //
                 // Due to the auto-parenthesization rules used by the visitor and factory functions
                 // we can safely elide the parentheses here, as a new synthetic
                 // ParenthesizedExpression will be inserted if we remove parentheses too
                 // aggressively.
-                //
-                // To preserve comments, we return a "PartiallyEmittedExpression" here which will
-                // preserve the position information of the original expression.
                 return ts.createPartiallyEmittedExpression(expression, node);
             }
             return ts.visitEachChild(node, visitor, context);
@@ -47255,6 +56275,14 @@ var ts;
             var expression = ts.visitNode(node.expression, visitor, ts.isLeftHandSideExpression);
             return ts.createPartiallyEmittedExpression(expression, node);
         }
+        function visitCallExpression(node) {
+            return ts.updateCall(node, ts.visitNode(node.expression, visitor, ts.isExpression), 
+            /*typeArguments*/ undefined, ts.visitNodes(node.arguments, visitor, ts.isExpression));
+        }
+        function visitNewExpression(node) {
+            return ts.updateNew(node, ts.visitNode(node.expression, visitor, ts.isExpression), 
+            /*typeArguments*/ undefined, ts.visitNodes(node.arguments, visitor, ts.isExpression));
+        }
         /**
          * Determines whether to emit an enum declaration.
          *
@@ -47265,21 +56293,6 @@ var ts;
                 || compilerOptions.preserveConstEnums
                 || compilerOptions.isolatedModules;
         }
-        function shouldEmitVarForEnumDeclaration(node) {
-            return isFirstEmittedDeclarationInScope(node)
-                && (!ts.hasModifier(node, 1 /* Export */)
-                    || isES6ExportedDeclaration(node));
-        }
-        /*
-         * Adds a trailing VariableStatement for an enum or module declaration.
-         */
-        function addVarForEnumExportedFromNamespace(statements, node) {
-            var statement = ts.createVariableStatement(
-            /*modifiers*/ undefined, [ts.createVariableDeclaration(getDeclarationName(node), 
-                /*type*/ undefined, getExportName(node))]);
-            ts.setSourceMapRange(statement, node);
-            statements.push(statement);
-        }
         /**
          * Visits an enum declaration.
          *
@@ -47294,16 +56307,14 @@ var ts;
             var statements = [];
             // We request to be advised when the printer is about to print this node. This allows
             // us to set up the correct state for later substitutions.
-            var emitFlags = 64 /* AdviseOnEmitNode */;
+            var emitFlags = 2 /* AdviseOnEmitNode */;
             // If needed, we should emit a variable declaration for the enum. If we emit
             // a leading variable declaration, we should not emit leading comments for the
             // enum body.
-            recordEmittedDeclarationInScope(node);
-            if (shouldEmitVarForEnumDeclaration(node)) {
-                addVarForEnumOrModuleDeclaration(statements, node);
+            if (addVarForEnumOrModuleDeclaration(statements, node)) {
                 // We should still emit the comments if we are emitting a system module.
                 if (moduleKind !== ts.ModuleKind.System || currentScope !== currentSourceFile) {
-                    emitFlags |= 16384 /* NoLeadingComments */;
+                    emitFlags |= 512 /* NoLeadingComments */;
                 }
             }
             // `parameterName` is the declaration name used inside of the enum.
@@ -47311,24 +56322,36 @@ var ts;
             // `containerName` is the expression used inside of the enum for assignments.
             var containerName = getNamespaceContainerName(node);
             // `exportName` is the expression used within this node's container for any exported references.
-            var exportName = getExportName(node);
+            var exportName = ts.hasModifier(node, 1 /* Export */)
+                ? ts.getExternalModuleOrNamespaceExportName(currentNamespaceContainerName, node, /*allowComments*/ false, /*allowSourceMaps*/ true)
+                : ts.getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ true);
+            //  x || (x = {})
+            //  exports.x || (exports.x = {})
+            var moduleArg = ts.createLogicalOr(exportName, ts.createAssignment(exportName, ts.createObjectLiteral()));
+            if (hasNamespaceQualifiedExportName(node)) {
+                // `localName` is the expression used within this node's containing scope for any local references.
+                var localName = ts.getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ true);
+                //  x = (exports.x || (exports.x = {}))
+                moduleArg = ts.createAssignment(localName, moduleArg);
+            }
             //  (function (x) {
             //      x[x["y"] = 0] = "y";
             //      ...
             //  })(x || (x = {}));
             var enumStatement = ts.createStatement(ts.createCall(ts.createFunctionExpression(
+            /*modifiers*/ undefined, 
             /*asteriskToken*/ undefined, 
             /*name*/ undefined, 
-            /*typeParameters*/ undefined, [ts.createParameter(parameterName)], 
+            /*typeParameters*/ undefined, [ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, parameterName)], 
             /*type*/ undefined, transformEnumBody(node, containerName)), 
-            /*typeArguments*/ undefined, [ts.createLogicalOr(exportName, ts.createAssignment(exportName, ts.createObjectLiteral()))]), 
-            /*location*/ node);
+            /*typeArguments*/ undefined, [moduleArg]));
             ts.setOriginalNode(enumStatement, node);
+            ts.setTextRange(enumStatement, node);
             ts.setEmitFlags(enumStatement, emitFlags);
             statements.push(enumStatement);
-            if (isNamespaceExport(node)) {
-                addVarForEnumExportedFromNamespace(statements, node);
-            }
+            // Add a DeclarationMarker for the enum to preserve trailing comments and mark
+            // the end of the declaration.
+            statements.push(ts.createEndOfDeclarationMarker(node));
             return statements;
         }
         /**
@@ -47344,8 +56367,7 @@ var ts;
             ts.addRange(statements, ts.map(node.members, transformEnumMember));
             ts.addRange(statements, endLexicalEnvironment());
             currentNamespaceContainerName = savedCurrentNamespaceLocalName;
-            return ts.createBlock(ts.createNodeArray(statements, /*location*/ node.members), 
-            /*location*/ undefined, 
+            return ts.createBlock(ts.setTextRange(ts.createNodeArray(statements), /*location*/ node.members), 
             /*multiLine*/ true);
         }
         /**
@@ -47358,9 +56380,12 @@ var ts;
             // we pass false as 'generateNameForComputedPropertyName' for a backward compatibility purposes
             // old emitter always generate 'expression' part of the name as-is.
             var name = getExpressionForPropertyName(member, /*generateNameForComputedPropertyName*/ false);
-            return ts.createStatement(ts.createAssignment(ts.createElementAccess(currentNamespaceContainerName, ts.createAssignment(ts.createElementAccess(currentNamespaceContainerName, name), transformEnumMemberDeclarationValue(member))), name, 
-            /*location*/ member), 
-            /*location*/ member);
+            var valueExpression = transformEnumMemberDeclarationValue(member);
+            var innerAssignment = ts.createAssignment(ts.createElementAccess(currentNamespaceContainerName, name), valueExpression);
+            var outerAssignment = valueExpression.kind === 9 /* StringLiteral */ ?
+                innerAssignment :
+                ts.createAssignment(ts.createElementAccess(currentNamespaceContainerName, innerAssignment), name);
+            return ts.setTextRange(ts.createStatement(ts.setTextRange(outerAssignment, member)), member);
         }
         /**
          * Transforms the value of an enum member.
@@ -47390,9 +56415,15 @@ var ts;
         function shouldEmitModuleDeclaration(node) {
             return ts.isInstantiatedModule(node, compilerOptions.preserveConstEnums || compilerOptions.isolatedModules);
         }
-        function isES6ExportedDeclaration(node) {
-            return isExternalModuleExport(node)
-                && moduleKind === ts.ModuleKind.ES6;
+        /**
+         * Determines whether an exported declaration will have a qualified export name (e.g. `f.x`
+         * or `exports.x`).
+         */
+        function hasNamespaceQualifiedExportName(node) {
+            return isExportOfNamespace(node)
+                || (isExternalModuleExport(node)
+                    && moduleKind !== ts.ModuleKind.ES2015
+                    && moduleKind !== ts.ModuleKind.System);
         }
         /**
          * Records that a declaration was emitted in the current scope, if it was the first
@@ -47407,8 +56438,8 @@ var ts;
                 if (!currentScopeFirstDeclarationsOfName) {
                     currentScopeFirstDeclarationsOfName = ts.createMap();
                 }
-                if (!(name in currentScopeFirstDeclarationsOfName)) {
-                    currentScopeFirstDeclarationsOfName[name] = node;
+                if (!currentScopeFirstDeclarationsOfName.has(name)) {
+                    currentScopeFirstDeclarationsOfName.set(name, node);
                 }
             }
         }
@@ -47418,55 +56449,66 @@ var ts;
          */
         function isFirstEmittedDeclarationInScope(node) {
             if (currentScopeFirstDeclarationsOfName) {
-                var name_31 = node.symbol && node.symbol.name;
-                if (name_31) {
-                    return currentScopeFirstDeclarationsOfName[name_31] === node;
+                var name_48 = node.symbol && node.symbol.name;
+                if (name_48) {
+                    return currentScopeFirstDeclarationsOfName.get(name_48) === node;
                 }
             }
             return false;
         }
-        function shouldEmitVarForModuleDeclaration(node) {
-            return isFirstEmittedDeclarationInScope(node);
-        }
         /**
          * Adds a leading VariableStatement for a enum or module declaration.
          */
         function addVarForEnumOrModuleDeclaration(statements, node) {
-            // Emit a variable statement for the module.
-            var statement = ts.createVariableStatement(isES6ExportedDeclaration(node)
-                ? ts.visitNodes(node.modifiers, visitor, ts.isModifier)
-                : undefined, [
-                ts.createVariableDeclaration(getDeclarationName(node, /*allowComments*/ false, /*allowSourceMaps*/ true))
-            ]);
-            ts.setOriginalNode(statement, /*original*/ node);
-            // Adjust the source map emit to match the old emitter.
-            if (node.kind === 224 /* EnumDeclaration */) {
-                ts.setSourceMapRange(statement.declarationList, node);
-            }
-            else {
-                ts.setSourceMapRange(statement, node);
-            }
-            // Trailing comments for module declaration should be emitted after the function closure
-            // instead of the variable statement:
-            //
-            //     /** Module comment*/
-            //     module m1 {
-            //         function foo4Export() {
-            //         }
-            //     } // trailing comment module
-            //
-            // Should emit:
-            //
-            //     /** Module comment*/
-            //     var m1;
-            //     (function (m1) {
-            //         function foo4Export() {
-            //         }
-            //     })(m1 || (m1 = {})); // trailing comment module
-            //
-            ts.setCommentRange(statement, node);
-            ts.setEmitFlags(statement, 32768 /* NoTrailingComments */);
-            statements.push(statement);
+            // Emit a variable statement for the module. We emit top-level enums as a `var`
+            // declaration to avoid static errors in global scripts scripts due to redeclaration.
+            // enums in any other scope are emitted as a `let` declaration.
+            var statement = ts.createVariableStatement(ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), ts.createVariableDeclarationList([
+                ts.createVariableDeclaration(ts.getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ true))
+            ], currentScope.kind === 265 /* SourceFile */ ? 0 /* None */ : 1 /* Let */));
+            ts.setOriginalNode(statement, node);
+            recordEmittedDeclarationInScope(node);
+            if (isFirstEmittedDeclarationInScope(node)) {
+                // Adjust the source map emit to match the old emitter.
+                if (node.kind === 232 /* EnumDeclaration */) {
+                    ts.setSourceMapRange(statement.declarationList, node);
+                }
+                else {
+                    ts.setSourceMapRange(statement, node);
+                }
+                // Trailing comments for module declaration should be emitted after the function closure
+                // instead of the variable statement:
+                //
+                //     /** Module comment*/
+                //     module m1 {
+                //         function foo4Export() {
+                //         }
+                //     } // trailing comment module
+                //
+                // Should emit:
+                //
+                //     /** Module comment*/
+                //     var m1;
+                //     (function (m1) {
+                //         function foo4Export() {
+                //         }
+                //     })(m1 || (m1 = {})); // trailing comment module
+                //
+                ts.setCommentRange(statement, node);
+                ts.setEmitFlags(statement, 1024 /* NoTrailingComments */ | 4194304 /* HasEndOfDeclarationMarker */);
+                statements.push(statement);
+                return true;
+            }
+            else {
+                // For an EnumDeclaration or ModuleDeclaration that merges with a preceeding
+                // declaration we do not emit a leading variable declaration. To preserve the
+                // begin/end semantics of the declararation and to properly handle exports
+                // we wrap the leading variable declaration in a `MergeDeclarationMarker`.
+                var mergeMarker = ts.createMergeDeclarationMarker(statement);
+                ts.setEmitFlags(mergeMarker, 1536 /* NoComments */ | 4194304 /* HasEndOfDeclarationMarker */);
+                statements.push(mergeMarker);
+                return false;
+            }
         }
         /**
          * Visits a module declaration node.
@@ -47484,16 +56526,14 @@ var ts;
             var statements = [];
             // We request to be advised when the printer is about to print this node. This allows
             // us to set up the correct state for later substitutions.
-            var emitFlags = 64 /* AdviseOnEmitNode */;
+            var emitFlags = 2 /* AdviseOnEmitNode */;
             // If needed, we should emit a variable declaration for the module. If we emit
             // a leading variable declaration, we should not emit leading comments for the
             // module body.
-            recordEmittedDeclarationInScope(node);
-            if (shouldEmitVarForModuleDeclaration(node)) {
-                addVarForEnumOrModuleDeclaration(statements, node);
+            if (addVarForEnumOrModuleDeclaration(statements, node)) {
                 // We should still emit the comments if we are emitting a system module.
                 if (moduleKind !== ts.ModuleKind.System || currentScope !== currentSourceFile) {
-                    emitFlags |= 16384 /* NoLeadingComments */;
+                    emitFlags |= 512 /* NoLeadingComments */;
                 }
             }
             // `parameterName` is the declaration name used inside of the namespace.
@@ -47501,13 +56541,15 @@ var ts;
             // `containerName` is the expression used inside of the namespace for exports.
             var containerName = getNamespaceContainerName(node);
             // `exportName` is the expression used within this node's container for any exported references.
-            var exportName = getExportName(node);
+            var exportName = ts.hasModifier(node, 1 /* Export */)
+                ? ts.getExternalModuleOrNamespaceExportName(currentNamespaceContainerName, node, /*allowComments*/ false, /*allowSourceMaps*/ true)
+                : ts.getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ true);
             //  x || (x = {})
             //  exports.x || (exports.x = {})
             var moduleArg = ts.createLogicalOr(exportName, ts.createAssignment(exportName, ts.createObjectLiteral()));
-            if (ts.hasModifier(node, 1 /* Export */) && !isES6ExportedDeclaration(node)) {
+            if (hasNamespaceQualifiedExportName(node)) {
                 // `localName` is the expression used within this node's containing scope for any local references.
-                var localName = getLocalName(node);
+                var localName = ts.getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ true);
                 //  x = (exports.x || (exports.x = {}))
                 moduleArg = ts.createAssignment(localName, moduleArg);
             }
@@ -47515,15 +56557,19 @@ var ts;
             //      x_1.y = ...;
             //  })(x || (x = {}));
             var moduleStatement = ts.createStatement(ts.createCall(ts.createFunctionExpression(
+            /*modifiers*/ undefined, 
             /*asteriskToken*/ undefined, 
             /*name*/ undefined, 
-            /*typeParameters*/ undefined, [ts.createParameter(parameterName)], 
+            /*typeParameters*/ undefined, [ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, parameterName)], 
             /*type*/ undefined, transformModuleBody(node, containerName)), 
-            /*typeArguments*/ undefined, [moduleArg]), 
-            /*location*/ node);
+            /*typeArguments*/ undefined, [moduleArg]));
             ts.setOriginalNode(moduleStatement, node);
+            ts.setTextRange(moduleStatement, node);
             ts.setEmitFlags(moduleStatement, emitFlags);
             statements.push(moduleStatement);
+            // Add a DeclarationMarker for the namespace to preserve trailing comments and mark
+            // the end of the declaration.
+            statements.push(ts.createEndOfDeclarationMarker(node));
             return statements;
         }
         /**
@@ -47543,8 +56589,8 @@ var ts;
             var statementsLocation;
             var blockLocation;
             var body = node.body;
-            if (body.kind === 226 /* ModuleBlock */) {
-                ts.addRange(statements, ts.visitNodes(body.statements, namespaceElementVisitor, ts.isStatement));
+            if (body.kind === 234 /* ModuleBlock */) {
+                saveStateAndInvoke(body, function (body) { return ts.addRange(statements, ts.visitNodes(body.statements, namespaceElementVisitor, ts.isStatement)); });
                 statementsLocation = body.statements;
                 blockLocation = body;
             }
@@ -47565,10 +56611,10 @@ var ts;
             currentNamespaceContainerName = savedCurrentNamespaceContainerName;
             currentNamespace = savedCurrentNamespace;
             currentScopeFirstDeclarationsOfName = savedCurrentScopeFirstDeclarationsOfName;
-            var block = ts.createBlock(ts.createNodeArray(statements, 
+            var block = ts.createBlock(ts.setTextRange(ts.createNodeArray(statements), 
             /*location*/ statementsLocation), 
-            /*location*/ blockLocation, 
             /*multiLine*/ true);
+            ts.setTextRange(block, blockLocation);
             // namespace hello.hi.world {
             //      function foo() {}
             //
@@ -47589,17 +56635,127 @@ var ts;
             //     })(hi = hello.hi || (hello.hi = {}));
             // })(hello || (hello = {}));
             // We only want to emit comment on the namespace which contains block body itself, not the containing namespaces.
-            if (body.kind !== 226 /* ModuleBlock */) {
-                ts.setEmitFlags(block, ts.getEmitFlags(block) | 49152 /* NoComments */);
+            if (body.kind !== 234 /* ModuleBlock */) {
+                ts.setEmitFlags(block, ts.getEmitFlags(block) | 1536 /* NoComments */);
             }
             return block;
         }
         function getInnerMostModuleDeclarationFromDottedModule(moduleDeclaration) {
-            if (moduleDeclaration.body.kind === 225 /* ModuleDeclaration */) {
+            if (moduleDeclaration.body.kind === 233 /* ModuleDeclaration */) {
                 var recursiveInnerModule = getInnerMostModuleDeclarationFromDottedModule(moduleDeclaration.body);
                 return recursiveInnerModule || moduleDeclaration.body;
             }
         }
+        /**
+         * Visits an import declaration, eliding it if it is not referenced.
+         *
+         * @param node The import declaration node.
+         */
+        function visitImportDeclaration(node) {
+            if (!node.importClause) {
+                // Do not elide a side-effect only import declaration.
+                //  import "foo";
+                return node;
+            }
+            // Elide the declaration if the import clause was elided.
+            var importClause = ts.visitNode(node.importClause, visitImportClause, ts.isImportClause);
+            return importClause
+                ? ts.updateImportDeclaration(node, 
+                /*decorators*/ undefined, 
+                /*modifiers*/ undefined, importClause, node.moduleSpecifier)
+                : undefined;
+        }
+        /**
+         * Visits an import clause, eliding it if it is not referenced.
+         *
+         * @param node The import clause node.
+         */
+        function visitImportClause(node) {
+            // Elide the import clause if we elide both its name and its named bindings.
+            var name = resolver.isReferencedAliasDeclaration(node) ? node.name : undefined;
+            var namedBindings = ts.visitNode(node.namedBindings, visitNamedImportBindings, ts.isNamedImportBindings);
+            return (name || namedBindings) ? ts.updateImportClause(node, name, namedBindings) : undefined;
+        }
+        /**
+         * Visits named import bindings, eliding it if it is not referenced.
+         *
+         * @param node The named import bindings node.
+         */
+        function visitNamedImportBindings(node) {
+            if (node.kind === 240 /* NamespaceImport */) {
+                // Elide a namespace import if it is not referenced.
+                return resolver.isReferencedAliasDeclaration(node) ? node : undefined;
+            }
+            else {
+                // Elide named imports if all of its import specifiers are elided.
+                var elements = ts.visitNodes(node.elements, visitImportSpecifier, ts.isImportSpecifier);
+                return ts.some(elements) ? ts.updateNamedImports(node, elements) : undefined;
+            }
+        }
+        /**
+         * Visits an import specifier, eliding it if it is not referenced.
+         *
+         * @param node The import specifier node.
+         */
+        function visitImportSpecifier(node) {
+            // Elide an import specifier if it is not referenced.
+            return resolver.isReferencedAliasDeclaration(node) ? node : undefined;
+        }
+        /**
+         * Visits an export assignment, eliding it if it does not contain a clause that resolves
+         * to a value.
+         *
+         * @param node The export assignment node.
+         */
+        function visitExportAssignment(node) {
+            // Elide the export assignment if it does not reference a value.
+            return resolver.isValueAliasDeclaration(node)
+                ? ts.visitEachChild(node, visitor, context)
+                : undefined;
+        }
+        /**
+         * Visits an export declaration, eliding it if it does not contain a clause that resolves
+         * to a value.
+         *
+         * @param node The export declaration node.
+         */
+        function visitExportDeclaration(node) {
+            if (!node.exportClause) {
+                // Elide a star export if the module it references does not export a value.
+                return compilerOptions.isolatedModules || resolver.moduleExportsSomeValue(node.moduleSpecifier) ? node : undefined;
+            }
+            if (!resolver.isValueAliasDeclaration(node)) {
+                // Elide the export declaration if it does not export a value.
+                return undefined;
+            }
+            // Elide the export declaration if all of its named exports are elided.
+            var exportClause = ts.visitNode(node.exportClause, visitNamedExports, ts.isNamedExports);
+            return exportClause
+                ? ts.updateExportDeclaration(node, 
+                /*decorators*/ undefined, 
+                /*modifiers*/ undefined, exportClause, node.moduleSpecifier)
+                : undefined;
+        }
+        /**
+         * Visits named exports, eliding it if it does not contain an export specifier that
+         * resolves to a value.
+         *
+         * @param node The named exports node.
+         */
+        function visitNamedExports(node) {
+            // Elide the named exports if all of its export specifiers were elided.
+            var elements = ts.visitNodes(node.elements, visitExportSpecifier, ts.isExportSpecifier);
+            return ts.some(elements) ? ts.updateNamedExports(node, elements) : undefined;
+        }
+        /**
+         * Visits an export specifier, eliding it if it does not resolve to a value.
+         *
+         * @param node The export specifier node.
+         */
+        function visitExportSpecifier(node) {
+            // Elide an export specifier if it does not reference a value.
+            return resolver.isValueAliasDeclaration(node) ? node : undefined;
+        }
         /**
          * Determines whether to emit an import equals declaration.
          *
@@ -47620,20 +56776,23 @@ var ts;
          */
         function visitImportEqualsDeclaration(node) {
             if (ts.isExternalModuleImportEqualsDeclaration(node)) {
-                return ts.visitEachChild(node, visitor, context);
+                // Elide external module `import=` if it is not referenced.
+                return resolver.isReferencedAliasDeclaration(node)
+                    ? ts.visitEachChild(node, visitor, context)
+                    : undefined;
             }
             if (!shouldEmitImportEqualsDeclaration(node)) {
                 return undefined;
             }
             var moduleReference = ts.createExpressionFromEntityName(node.moduleReference);
-            ts.setEmitFlags(moduleReference, 49152 /* NoComments */ | 65536 /* NoNestedComments */);
-            if (isNamedExternalModuleExport(node) || !isNamespaceExport(node)) {
+            ts.setEmitFlags(moduleReference, 1536 /* NoComments */ | 2048 /* NoNestedComments */);
+            if (isNamedExternalModuleExport(node) || !isExportOfNamespace(node)) {
                 //  export var ${name} = ${moduleReference};
                 //  var ${name} = ${moduleReference};
-                return ts.setOriginalNode(ts.createVariableStatement(ts.visitNodes(node.modifiers, visitor, ts.isModifier), ts.createVariableDeclarationList([
-                    ts.createVariableDeclaration(node.name, 
-                    /*type*/ undefined, moduleReference)
-                ]), node), node);
+                return ts.setOriginalNode(ts.setTextRange(ts.createVariableStatement(ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), ts.createVariableDeclarationList([
+                    ts.setOriginalNode(ts.createVariableDeclaration(node.name, 
+                    /*type*/ undefined, moduleReference), node)
+                ])), node), node);
             }
             else {
                 // exports.${name} = ${moduleReference};
@@ -47645,7 +56804,7 @@ var ts;
          *
          * @param node The node to test.
          */
-        function isNamespaceExport(node) {
+        function isExportOfNamespace(node) {
             return currentNamespace !== undefined && ts.hasModifier(node, 1 /* Export */);
         }
         /**
@@ -47678,379 +56837,1262 @@ var ts;
          * Creates a statement for the provided expression. This is used in calls to `map`.
          */
         function expressionToStatement(expression) {
-            return ts.createStatement(expression, /*location*/ undefined);
+            return ts.createStatement(expression);
         }
         function addExportMemberAssignment(statements, node) {
-            var expression = ts.createAssignment(getExportName(node), getLocalName(node, /*noSourceMaps*/ true));
+            var expression = ts.createAssignment(ts.getExternalModuleOrNamespaceExportName(currentNamespaceContainerName, node, /*allowComments*/ false, /*allowSourceMaps*/ true), ts.getLocalName(node));
             ts.setSourceMapRange(expression, ts.createRange(node.name.pos, node.end));
             var statement = ts.createStatement(expression);
             ts.setSourceMapRange(statement, ts.createRange(-1, node.end));
             statements.push(statement);
         }
-        function createNamespaceExport(exportName, exportValue, location) {
-            return ts.createStatement(ts.createAssignment(getNamespaceMemberName(exportName, /*allowComments*/ false, /*allowSourceMaps*/ true), exportValue), location);
+        function createNamespaceExport(exportName, exportValue, location) {
+            return ts.setTextRange(ts.createStatement(ts.createAssignment(ts.getNamespaceMemberName(currentNamespaceContainerName, exportName, /*allowComments*/ false, /*allowSourceMaps*/ true), exportValue)), location);
+        }
+        function createNamespaceExportExpression(exportName, exportValue, location) {
+            return ts.setTextRange(ts.createAssignment(getNamespaceMemberNameWithSourceMapsAndWithoutComments(exportName), exportValue), location);
+        }
+        function getNamespaceMemberNameWithSourceMapsAndWithoutComments(name) {
+            return ts.getNamespaceMemberName(currentNamespaceContainerName, name, /*allowComments*/ false, /*allowSourceMaps*/ true);
+        }
+        /**
+         * Gets the declaration name used inside of a namespace or enum.
+         */
+        function getNamespaceParameterName(node) {
+            var name = ts.getGeneratedNameForNode(node);
+            ts.setSourceMapRange(name, node.name);
+            return name;
+        }
+        /**
+         * Gets the expression used to refer to a namespace or enum within the body
+         * of its declaration.
+         */
+        function getNamespaceContainerName(node) {
+            return ts.getGeneratedNameForNode(node);
+        }
+        /**
+         * Gets a local alias for a class declaration if it is a decorated class with an internal
+         * reference to the static side of the class. This is necessary to avoid issues with
+         * double-binding semantics for the class name.
+         */
+        function getClassAliasIfNeeded(node) {
+            if (resolver.getNodeCheckFlags(node) & 8388608 /* ClassWithConstructorReference */) {
+                enableSubstitutionForClassAliases();
+                var classAlias = ts.createUniqueName(node.name && !ts.isGeneratedIdentifier(node.name) ? ts.unescapeIdentifier(node.name.text) : "default");
+                classAliases[ts.getOriginalNodeId(node)] = classAlias;
+                hoistVariableDeclaration(classAlias);
+                return classAlias;
+            }
+        }
+        function getClassPrototype(node) {
+            return ts.createPropertyAccess(ts.getDeclarationName(node), "prototype");
+        }
+        function getClassMemberPrefix(node, member) {
+            return ts.hasModifier(member, 32 /* Static */)
+                ? ts.getDeclarationName(node)
+                : getClassPrototype(node);
+        }
+        function enableSubstitutionForNonQualifiedEnumMembers() {
+            if ((enabledSubstitutions & 8 /* NonQualifiedEnumMembers */) === 0) {
+                enabledSubstitutions |= 8 /* NonQualifiedEnumMembers */;
+                context.enableSubstitution(71 /* Identifier */);
+            }
+        }
+        function enableSubstitutionForClassAliases() {
+            if ((enabledSubstitutions & 1 /* ClassAliases */) === 0) {
+                enabledSubstitutions |= 1 /* ClassAliases */;
+                // We need to enable substitutions for identifiers. This allows us to
+                // substitute class names inside of a class declaration.
+                context.enableSubstitution(71 /* Identifier */);
+                // Keep track of class aliases.
+                classAliases = [];
+            }
+        }
+        function enableSubstitutionForNamespaceExports() {
+            if ((enabledSubstitutions & 2 /* NamespaceExports */) === 0) {
+                enabledSubstitutions |= 2 /* NamespaceExports */;
+                // We need to enable substitutions for identifiers and shorthand property assignments. This allows us to
+                // substitute the names of exported members of a namespace.
+                context.enableSubstitution(71 /* Identifier */);
+                context.enableSubstitution(262 /* ShorthandPropertyAssignment */);
+                // We need to be notified when entering and exiting namespaces.
+                context.enableEmitNotification(233 /* ModuleDeclaration */);
+            }
+        }
+        function isTransformedModuleDeclaration(node) {
+            return ts.getOriginalNode(node).kind === 233 /* ModuleDeclaration */;
+        }
+        function isTransformedEnumDeclaration(node) {
+            return ts.getOriginalNode(node).kind === 232 /* EnumDeclaration */;
+        }
+        /**
+         * Hook for node emit.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to emit.
+         * @param emit A callback used to emit the node in the printer.
+         */
+        function onEmitNode(hint, node, emitCallback) {
+            var savedApplicableSubstitutions = applicableSubstitutions;
+            var savedCurrentSourceFile = currentSourceFile;
+            if (ts.isSourceFile(node)) {
+                currentSourceFile = node;
+            }
+            if (enabledSubstitutions & 2 /* NamespaceExports */ && isTransformedModuleDeclaration(node)) {
+                applicableSubstitutions |= 2 /* NamespaceExports */;
+            }
+            if (enabledSubstitutions & 8 /* NonQualifiedEnumMembers */ && isTransformedEnumDeclaration(node)) {
+                applicableSubstitutions |= 8 /* NonQualifiedEnumMembers */;
+            }
+            previousOnEmitNode(hint, node, emitCallback);
+            applicableSubstitutions = savedApplicableSubstitutions;
+            currentSourceFile = savedCurrentSourceFile;
+        }
+        /**
+         * Hooks node substitutions.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to substitute.
+         */
+        function onSubstituteNode(hint, node) {
+            node = previousOnSubstituteNode(hint, node);
+            if (hint === 1 /* Expression */) {
+                return substituteExpression(node);
+            }
+            else if (ts.isShorthandPropertyAssignment(node)) {
+                return substituteShorthandPropertyAssignment(node);
+            }
+            return node;
+        }
+        function substituteShorthandPropertyAssignment(node) {
+            if (enabledSubstitutions & 2 /* NamespaceExports */) {
+                var name_49 = node.name;
+                var exportedName = trySubstituteNamespaceExportedName(name_49);
+                if (exportedName) {
+                    // A shorthand property with an assignment initializer is probably part of a
+                    // destructuring assignment
+                    if (node.objectAssignmentInitializer) {
+                        var initializer = ts.createAssignment(exportedName, node.objectAssignmentInitializer);
+                        return ts.setTextRange(ts.createPropertyAssignment(name_49, initializer), node);
+                    }
+                    return ts.setTextRange(ts.createPropertyAssignment(name_49, exportedName), node);
+                }
+            }
+            return node;
+        }
+        function substituteExpression(node) {
+            switch (node.kind) {
+                case 71 /* Identifier */:
+                    return substituteExpressionIdentifier(node);
+                case 179 /* PropertyAccessExpression */:
+                    return substitutePropertyAccessExpression(node);
+                case 180 /* ElementAccessExpression */:
+                    return substituteElementAccessExpression(node);
+            }
+            return node;
+        }
+        function substituteExpressionIdentifier(node) {
+            return trySubstituteClassAlias(node)
+                || trySubstituteNamespaceExportedName(node)
+                || node;
+        }
+        function trySubstituteClassAlias(node) {
+            if (enabledSubstitutions & 1 /* ClassAliases */) {
+                if (resolver.getNodeCheckFlags(node) & 16777216 /* ConstructorReferenceInClass */) {
+                    // Due to the emit for class decorators, any reference to the class from inside of the class body
+                    // must instead be rewritten to point to a temporary variable to avoid issues with the double-bind
+                    // behavior of class names in ES6.
+                    // Also, when emitting statics for class expressions, we must substitute a class alias for
+                    // constructor references in static property initializers.
+                    var declaration = resolver.getReferencedValueDeclaration(node);
+                    if (declaration) {
+                        var classAlias = classAliases[declaration.id];
+                        if (classAlias) {
+                            var clone_1 = ts.getSynthesizedClone(classAlias);
+                            ts.setSourceMapRange(clone_1, node);
+                            ts.setCommentRange(clone_1, node);
+                            return clone_1;
+                        }
+                    }
+                }
+            }
+            return undefined;
+        }
+        function trySubstituteNamespaceExportedName(node) {
+            // If this is explicitly a local name, do not substitute.
+            if (enabledSubstitutions & applicableSubstitutions && !ts.isGeneratedIdentifier(node) && !ts.isLocalName(node)) {
+                // If we are nested within a namespace declaration, we may need to qualifiy
+                // an identifier that is exported from a merged namespace.
+                var container = resolver.getReferencedExportContainer(node, /*prefixLocals*/ false);
+                if (container && container.kind !== 265 /* SourceFile */) {
+                    var substitute = (applicableSubstitutions & 2 /* NamespaceExports */ && container.kind === 233 /* ModuleDeclaration */) ||
+                        (applicableSubstitutions & 8 /* NonQualifiedEnumMembers */ && container.kind === 232 /* EnumDeclaration */);
+                    if (substitute) {
+                        return ts.setTextRange(ts.createPropertyAccess(ts.getGeneratedNameForNode(container), node), 
+                        /*location*/ node);
+                    }
+                }
+            }
+            return undefined;
+        }
+        function substitutePropertyAccessExpression(node) {
+            return substituteConstantValue(node);
+        }
+        function substituteElementAccessExpression(node) {
+            return substituteConstantValue(node);
+        }
+        function substituteConstantValue(node) {
+            var constantValue = tryGetConstEnumValue(node);
+            if (constantValue !== undefined) {
+                // track the constant value on the node for the printer in needsDotDotForPropertyAccess
+                ts.setConstantValue(node, constantValue);
+                var substitute = ts.createLiteral(constantValue);
+                if (!compilerOptions.removeComments) {
+                    var propertyName = ts.isPropertyAccessExpression(node)
+                        ? ts.declarationNameToString(node.name)
+                        : ts.getTextOfNode(node.argumentExpression);
+                    ts.addSyntheticTrailingComment(substitute, 3 /* MultiLineCommentTrivia */, " " + propertyName + " ");
+                }
+                return substitute;
+            }
+            return node;
+        }
+        function tryGetConstEnumValue(node) {
+            if (compilerOptions.isolatedModules) {
+                return undefined;
+            }
+            return ts.isPropertyAccessExpression(node) || ts.isElementAccessExpression(node)
+                ? resolver.getConstantValue(node)
+                : undefined;
+        }
+    }
+    ts.transformTypeScript = transformTypeScript;
+    function createDecorateHelper(context, decoratorExpressions, target, memberName, descriptor, location) {
+        var argumentsArray = [];
+        argumentsArray.push(ts.createArrayLiteral(decoratorExpressions, /*multiLine*/ true));
+        argumentsArray.push(target);
+        if (memberName) {
+            argumentsArray.push(memberName);
+            if (descriptor) {
+                argumentsArray.push(descriptor);
+            }
+        }
+        context.requestEmitHelper(decorateHelper);
+        return ts.setTextRange(ts.createCall(ts.getHelperName("__decorate"), 
+        /*typeArguments*/ undefined, argumentsArray), location);
+    }
+    var decorateHelper = {
+        name: "typescript:decorate",
+        scoped: false,
+        priority: 2,
+        text: "\n            var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {\n                var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;\n                if (typeof Reflect === \"object\" && typeof Reflect.decorate === \"function\") r = Reflect.decorate(decorators, target, key, desc);\n                else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;\n                return c > 3 && r && Object.defineProperty(target, key, r), r;\n            };"
+    };
+    function createMetadataHelper(context, metadataKey, metadataValue) {
+        context.requestEmitHelper(metadataHelper);
+        return ts.createCall(ts.getHelperName("__metadata"), 
+        /*typeArguments*/ undefined, [
+            ts.createLiteral(metadataKey),
+            metadataValue
+        ]);
+    }
+    var metadataHelper = {
+        name: "typescript:metadata",
+        scoped: false,
+        priority: 3,
+        text: "\n            var __metadata = (this && this.__metadata) || function (k, v) {\n                if (typeof Reflect === \"object\" && typeof Reflect.metadata === \"function\") return Reflect.metadata(k, v);\n            };"
+    };
+    function createParamHelper(context, expression, parameterOffset, location) {
+        context.requestEmitHelper(paramHelper);
+        return ts.setTextRange(ts.createCall(ts.getHelperName("__param"), 
+        /*typeArguments*/ undefined, [
+            ts.createLiteral(parameterOffset),
+            expression
+        ]), location);
+    }
+    var paramHelper = {
+        name: "typescript:param",
+        scoped: false,
+        priority: 4,
+        text: "\n            var __param = (this && this.__param) || function (paramIndex, decorator) {\n                return function (target, key) { decorator(target, key, paramIndex); }\n            };"
+    };
+})(ts || (ts = {}));
+/// <reference path="../factory.ts" />
+/// <reference path="../visitor.ts" />
+/*@internal*/
+var ts;
+(function (ts) {
+    var ES2017SubstitutionFlags;
+    (function (ES2017SubstitutionFlags) {
+        /** Enables substitutions for async methods with `super` calls. */
+        ES2017SubstitutionFlags[ES2017SubstitutionFlags["AsyncMethodsWithSuper"] = 1] = "AsyncMethodsWithSuper";
+    })(ES2017SubstitutionFlags || (ES2017SubstitutionFlags = {}));
+    function transformES2017(context) {
+        var startLexicalEnvironment = context.startLexicalEnvironment, resumeLexicalEnvironment = context.resumeLexicalEnvironment, endLexicalEnvironment = context.endLexicalEnvironment;
+        var resolver = context.getEmitResolver();
+        var compilerOptions = context.getCompilerOptions();
+        var languageVersion = ts.getEmitScriptTarget(compilerOptions);
+        // These variables contain state that changes as we descend into the tree.
+        var currentSourceFile;
+        /**
+         * Keeps track of whether expression substitution has been enabled for specific edge cases.
+         * They are persisted between each SourceFile transformation and should not be reset.
+         */
+        var enabledSubstitutions;
+        /**
+         * This keeps track of containers where `super` is valid, for use with
+         * just-in-time substitution for `super` expressions inside of async methods.
+         */
+        var enclosingSuperContainerFlags = 0;
+        // Save the previous transformation hooks.
+        var previousOnEmitNode = context.onEmitNode;
+        var previousOnSubstituteNode = context.onSubstituteNode;
+        // Set new transformation hooks.
+        context.onEmitNode = onEmitNode;
+        context.onSubstituteNode = onSubstituteNode;
+        return transformSourceFile;
+        function transformSourceFile(node) {
+            if (node.isDeclarationFile) {
+                return node;
+            }
+            currentSourceFile = node;
+            var visited = ts.visitEachChild(node, visitor, context);
+            ts.addEmitHelpers(visited, context.readEmitHelpers());
+            currentSourceFile = undefined;
+            return visited;
+        }
+        function visitor(node) {
+            if ((node.transformFlags & 16 /* ContainsES2017 */) === 0) {
+                return node;
+            }
+            switch (node.kind) {
+                case 120 /* AsyncKeyword */:
+                    // ES2017 async modifier should be elided for targets < ES2017
+                    return undefined;
+                case 191 /* AwaitExpression */:
+                    return visitAwaitExpression(node);
+                case 151 /* MethodDeclaration */:
+                    return visitMethodDeclaration(node);
+                case 228 /* FunctionDeclaration */:
+                    return visitFunctionDeclaration(node);
+                case 186 /* FunctionExpression */:
+                    return visitFunctionExpression(node);
+                case 187 /* ArrowFunction */:
+                    return visitArrowFunction(node);
+                default:
+                    return ts.visitEachChild(node, visitor, context);
+            }
+        }
+        /**
+         * Visits an AwaitExpression node.
+         *
+         * This function will be called any time a ES2017 await expression is encountered.
+         *
+         * @param node The node to visit.
+         */
+        function visitAwaitExpression(node) {
+            return ts.setOriginalNode(ts.setTextRange(ts.createYield(
+            /*asteriskToken*/ undefined, ts.visitNode(node.expression, visitor, ts.isExpression)), node), node);
+        }
+        /**
+         * Visits a MethodDeclaration node.
+         *
+         * This function will be called when one of the following conditions are met:
+         * - The node is marked as async
+         *
+         * @param node The node to visit.
+         */
+        function visitMethodDeclaration(node) {
+            return ts.updateMethod(node, 
+            /*decorators*/ undefined, ts.visitNodes(node.modifiers, visitor, ts.isModifier), node.asteriskToken, node.name, 
+            /*questionToken*/ undefined, 
+            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
+            /*type*/ undefined, ts.getFunctionFlags(node) & 2 /* Async */
+                ? transformAsyncFunctionBody(node)
+                : ts.visitFunctionBody(node.body, visitor, context));
+        }
+        /**
+         * Visits a FunctionDeclaration node.
+         *
+         * This function will be called when one of the following conditions are met:
+         * - The node is marked async
+         *
+         * @param node The node to visit.
+         */
+        function visitFunctionDeclaration(node) {
+            return ts.updateFunctionDeclaration(node, 
+            /*decorators*/ undefined, ts.visitNodes(node.modifiers, visitor, ts.isModifier), node.asteriskToken, node.name, 
+            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
+            /*type*/ undefined, ts.getFunctionFlags(node) & 2 /* Async */
+                ? transformAsyncFunctionBody(node)
+                : ts.visitFunctionBody(node.body, visitor, context));
+        }
+        /**
+         * Visits a FunctionExpression node.
+         *
+         * This function will be called when one of the following conditions are met:
+         * - The node is marked async
+         *
+         * @param node The node to visit.
+         */
+        function visitFunctionExpression(node) {
+            return ts.updateFunctionExpression(node, ts.visitNodes(node.modifiers, visitor, ts.isModifier), node.asteriskToken, node.name, 
+            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
+            /*type*/ undefined, ts.getFunctionFlags(node) & 2 /* Async */
+                ? transformAsyncFunctionBody(node)
+                : ts.visitFunctionBody(node.body, visitor, context));
+        }
+        /**
+         * Visits an ArrowFunction.
+         *
+         * This function will be called when one of the following conditions are met:
+         * - The node is marked async
+         *
+         * @param node The node to visit.
+         */
+        function visitArrowFunction(node) {
+            return ts.updateArrowFunction(node, ts.visitNodes(node.modifiers, visitor, ts.isModifier), 
+            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
+            /*type*/ undefined, ts.getFunctionFlags(node) & 2 /* Async */
+                ? transformAsyncFunctionBody(node)
+                : ts.visitFunctionBody(node.body, visitor, context));
+        }
+        function transformAsyncFunctionBody(node) {
+            resumeLexicalEnvironment();
+            var original = ts.getOriginalNode(node, ts.isFunctionLike);
+            var nodeType = original.type;
+            var promiseConstructor = languageVersion < 2 /* ES2015 */ ? getPromiseConstructor(nodeType) : undefined;
+            var isArrowFunction = node.kind === 187 /* ArrowFunction */;
+            var hasLexicalArguments = (resolver.getNodeCheckFlags(node) & 8192 /* CaptureArguments */) !== 0;
+            // An async function is emit as an outer function that calls an inner
+            // generator function. To preserve lexical bindings, we pass the current
+            // `this` and `arguments` objects to `__awaiter`. The generator function
+            // passed to `__awaiter` is executed inside of the callback to the
+            // promise constructor.
+            if (!isArrowFunction) {
+                var statements = [];
+                var statementOffset = ts.addPrologue(statements, node.body.statements, /*ensureUseStrict*/ false, visitor);
+                statements.push(ts.createReturn(createAwaiterHelper(context, hasLexicalArguments, promiseConstructor, transformFunctionBodyWorker(node.body, statementOffset))));
+                ts.addRange(statements, endLexicalEnvironment());
+                var block = ts.createBlock(statements, /*multiLine*/ true);
+                ts.setTextRange(block, node.body);
+                // Minor optimization, emit `_super` helper to capture `super` access in an arrow.
+                // This step isn't needed if we eventually transform this to ES5.
+                if (languageVersion >= 2 /* ES2015 */) {
+                    if (resolver.getNodeCheckFlags(node) & 4096 /* AsyncMethodWithSuperBinding */) {
+                        enableSubstitutionForAsyncMethodsWithSuper();
+                        ts.addEmitHelper(block, ts.advancedAsyncSuperHelper);
+                    }
+                    else if (resolver.getNodeCheckFlags(node) & 2048 /* AsyncMethodWithSuper */) {
+                        enableSubstitutionForAsyncMethodsWithSuper();
+                        ts.addEmitHelper(block, ts.asyncSuperHelper);
+                    }
+                }
+                return block;
+            }
+            else {
+                var expression = createAwaiterHelper(context, hasLexicalArguments, promiseConstructor, transformFunctionBodyWorker(node.body));
+                var declarations = endLexicalEnvironment();
+                if (ts.some(declarations)) {
+                    var block = ts.convertToFunctionBody(expression);
+                    return ts.updateBlock(block, ts.setTextRange(ts.createNodeArray(ts.concatenate(block.statements, declarations)), block.statements));
+                }
+                return expression;
+            }
+        }
+        function transformFunctionBodyWorker(body, start) {
+            if (ts.isBlock(body)) {
+                return ts.updateBlock(body, ts.visitLexicalEnvironment(body.statements, visitor, context, start));
+            }
+            else {
+                startLexicalEnvironment();
+                var visited = ts.convertToFunctionBody(ts.visitNode(body, visitor, ts.isConciseBody));
+                var declarations = endLexicalEnvironment();
+                return ts.updateBlock(visited, ts.setTextRange(ts.createNodeArray(ts.concatenate(visited.statements, declarations)), visited.statements));
+            }
+        }
+        function getPromiseConstructor(type) {
+            var typeName = type && ts.getEntityNameFromTypeNode(type);
+            if (typeName && ts.isEntityName(typeName)) {
+                var serializationKind = resolver.getTypeReferenceSerializationKind(typeName);
+                if (serializationKind === ts.TypeReferenceSerializationKind.TypeWithConstructSignatureAndValue
+                    || serializationKind === ts.TypeReferenceSerializationKind.Unknown) {
+                    return typeName;
+                }
+            }
+            return undefined;
+        }
+        function enableSubstitutionForAsyncMethodsWithSuper() {
+            if ((enabledSubstitutions & 1 /* AsyncMethodsWithSuper */) === 0) {
+                enabledSubstitutions |= 1 /* AsyncMethodsWithSuper */;
+                // We need to enable substitutions for call, property access, and element access
+                // if we need to rewrite super calls.
+                context.enableSubstitution(181 /* CallExpression */);
+                context.enableSubstitution(179 /* PropertyAccessExpression */);
+                context.enableSubstitution(180 /* ElementAccessExpression */);
+                // We need to be notified when entering and exiting declarations that bind super.
+                context.enableEmitNotification(229 /* ClassDeclaration */);
+                context.enableEmitNotification(151 /* MethodDeclaration */);
+                context.enableEmitNotification(153 /* GetAccessor */);
+                context.enableEmitNotification(154 /* SetAccessor */);
+                context.enableEmitNotification(152 /* Constructor */);
+            }
+        }
+        /**
+         * Hook for node emit.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to emit.
+         * @param emit A callback used to emit the node in the printer.
+         */
+        function onEmitNode(hint, node, emitCallback) {
+            // If we need to support substitutions for `super` in an async method,
+            // we should track it here.
+            if (enabledSubstitutions & 1 /* AsyncMethodsWithSuper */ && isSuperContainer(node)) {
+                var superContainerFlags = resolver.getNodeCheckFlags(node) & (2048 /* AsyncMethodWithSuper */ | 4096 /* AsyncMethodWithSuperBinding */);
+                if (superContainerFlags !== enclosingSuperContainerFlags) {
+                    var savedEnclosingSuperContainerFlags = enclosingSuperContainerFlags;
+                    enclosingSuperContainerFlags = superContainerFlags;
+                    previousOnEmitNode(hint, node, emitCallback);
+                    enclosingSuperContainerFlags = savedEnclosingSuperContainerFlags;
+                    return;
+                }
+            }
+            previousOnEmitNode(hint, node, emitCallback);
+        }
+        /**
+         * Hooks node substitutions.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to substitute.
+         */
+        function onSubstituteNode(hint, node) {
+            node = previousOnSubstituteNode(hint, node);
+            if (hint === 1 /* Expression */ && enclosingSuperContainerFlags) {
+                return substituteExpression(node);
+            }
+            return node;
+        }
+        function substituteExpression(node) {
+            switch (node.kind) {
+                case 179 /* PropertyAccessExpression */:
+                    return substitutePropertyAccessExpression(node);
+                case 180 /* ElementAccessExpression */:
+                    return substituteElementAccessExpression(node);
+                case 181 /* CallExpression */:
+                    return substituteCallExpression(node);
+            }
+            return node;
+        }
+        function substitutePropertyAccessExpression(node) {
+            if (node.expression.kind === 97 /* SuperKeyword */) {
+                return createSuperAccessInAsyncMethod(ts.createLiteral(node.name.text), node);
+            }
+            return node;
+        }
+        function substituteElementAccessExpression(node) {
+            if (node.expression.kind === 97 /* SuperKeyword */) {
+                return createSuperAccessInAsyncMethod(node.argumentExpression, node);
+            }
+            return node;
+        }
+        function substituteCallExpression(node) {
+            var expression = node.expression;
+            if (ts.isSuperProperty(expression)) {
+                var argumentExpression = ts.isPropertyAccessExpression(expression)
+                    ? substitutePropertyAccessExpression(expression)
+                    : substituteElementAccessExpression(expression);
+                return ts.createCall(ts.createPropertyAccess(argumentExpression, "call"), 
+                /*typeArguments*/ undefined, [
+                    ts.createThis()
+                ].concat(node.arguments));
+            }
+            return node;
+        }
+        function isSuperContainer(node) {
+            var kind = node.kind;
+            return kind === 229 /* ClassDeclaration */
+                || kind === 152 /* Constructor */
+                || kind === 151 /* MethodDeclaration */
+                || kind === 153 /* GetAccessor */
+                || kind === 154 /* SetAccessor */;
+        }
+        function createSuperAccessInAsyncMethod(argumentExpression, location) {
+            if (enclosingSuperContainerFlags & 4096 /* AsyncMethodWithSuperBinding */) {
+                return ts.setTextRange(ts.createPropertyAccess(ts.createCall(ts.createIdentifier("_super"), 
+                /*typeArguments*/ undefined, [argumentExpression]), "value"), location);
+            }
+            else {
+                return ts.setTextRange(ts.createCall(ts.createIdentifier("_super"), 
+                /*typeArguments*/ undefined, [argumentExpression]), location);
+            }
+        }
+    }
+    ts.transformES2017 = transformES2017;
+    var awaiterHelper = {
+        name: "typescript:awaiter",
+        scoped: false,
+        priority: 5,
+        text: "\n            var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {\n                return new (P || (P = Promise))(function (resolve, reject) {\n                    function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }\n                    function rejected(value) { try { step(generator[\"throw\"](value)); } catch (e) { reject(e); } }\n                    function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }\n                    step((generator = generator.apply(thisArg, _arguments || [])).next());\n                });\n            };"
+    };
+    function createAwaiterHelper(context, hasLexicalArguments, promiseConstructor, body) {
+        context.requestEmitHelper(awaiterHelper);
+        var generatorFunc = ts.createFunctionExpression(
+        /*modifiers*/ undefined, ts.createToken(39 /* AsteriskToken */), 
+        /*name*/ undefined, 
+        /*typeParameters*/ undefined, 
+        /*parameters*/ [], 
+        /*type*/ undefined, body);
+        // Mark this node as originally an async function
+        (generatorFunc.emitNode || (generatorFunc.emitNode = {})).flags |= 262144 /* AsyncFunctionBody */;
+        return ts.createCall(ts.getHelperName("__awaiter"), 
+        /*typeArguments*/ undefined, [
+            ts.createThis(),
+            hasLexicalArguments ? ts.createIdentifier("arguments") : ts.createVoidZero(),
+            promiseConstructor ? ts.createExpressionFromEntityName(promiseConstructor) : ts.createVoidZero(),
+            generatorFunc
+        ]);
+    }
+    ts.asyncSuperHelper = {
+        name: "typescript:async-super",
+        scoped: true,
+        text: "\n            const _super = name => super[name];\n        "
+    };
+    ts.advancedAsyncSuperHelper = {
+        name: "typescript:advanced-async-super",
+        scoped: true,
+        text: "\n            const _super = (function (geti, seti) {\n                const cache = Object.create(null);\n                return name => cache[name] || (cache[name] = { get value() { return geti(name); }, set value(v) { seti(name, v); } });\n            })(name => super[name], (name, value) => super[name] = value);\n        "
+    };
+})(ts || (ts = {}));
+/// <reference path="../factory.ts" />
+/// <reference path="../visitor.ts" />
+/// <reference path="es2017.ts" />
+/*@internal*/
+var ts;
+(function (ts) {
+    var ESNextSubstitutionFlags;
+    (function (ESNextSubstitutionFlags) {
+        /** Enables substitutions for async methods with `super` calls. */
+        ESNextSubstitutionFlags[ESNextSubstitutionFlags["AsyncMethodsWithSuper"] = 1] = "AsyncMethodsWithSuper";
+    })(ESNextSubstitutionFlags || (ESNextSubstitutionFlags = {}));
+    function transformESNext(context) {
+        var resumeLexicalEnvironment = context.resumeLexicalEnvironment, endLexicalEnvironment = context.endLexicalEnvironment, hoistVariableDeclaration = context.hoistVariableDeclaration;
+        var resolver = context.getEmitResolver();
+        var compilerOptions = context.getCompilerOptions();
+        var languageVersion = ts.getEmitScriptTarget(compilerOptions);
+        var previousOnEmitNode = context.onEmitNode;
+        context.onEmitNode = onEmitNode;
+        var previousOnSubstituteNode = context.onSubstituteNode;
+        context.onSubstituteNode = onSubstituteNode;
+        var enabledSubstitutions;
+        var enclosingFunctionFlags;
+        var enclosingSuperContainerFlags = 0;
+        return transformSourceFile;
+        function transformSourceFile(node) {
+            if (node.isDeclarationFile) {
+                return node;
+            }
+            var visited = ts.visitEachChild(node, visitor, context);
+            ts.addEmitHelpers(visited, context.readEmitHelpers());
+            return visited;
+        }
+        function visitor(node) {
+            return visitorWorker(node, /*noDestructuringValue*/ false);
+        }
+        function visitorNoDestructuringValue(node) {
+            return visitorWorker(node, /*noDestructuringValue*/ true);
+        }
+        function visitorNoAsyncModifier(node) {
+            if (node.kind === 120 /* AsyncKeyword */) {
+                return undefined;
+            }
+            return node;
+        }
+        function visitorWorker(node, noDestructuringValue) {
+            if ((node.transformFlags & 8 /* ContainsESNext */) === 0) {
+                return node;
+            }
+            switch (node.kind) {
+                case 191 /* AwaitExpression */:
+                    return visitAwaitExpression(node);
+                case 197 /* YieldExpression */:
+                    return visitYieldExpression(node);
+                case 222 /* LabeledStatement */:
+                    return visitLabeledStatement(node);
+                case 178 /* ObjectLiteralExpression */:
+                    return visitObjectLiteralExpression(node);
+                case 194 /* BinaryExpression */:
+                    return visitBinaryExpression(node, noDestructuringValue);
+                case 226 /* VariableDeclaration */:
+                    return visitVariableDeclaration(node);
+                case 216 /* ForOfStatement */:
+                    return visitForOfStatement(node, /*outermostLabeledStatement*/ undefined);
+                case 214 /* ForStatement */:
+                    return visitForStatement(node);
+                case 190 /* VoidExpression */:
+                    return visitVoidExpression(node);
+                case 152 /* Constructor */:
+                    return visitConstructorDeclaration(node);
+                case 151 /* MethodDeclaration */:
+                    return visitMethodDeclaration(node);
+                case 153 /* GetAccessor */:
+                    return visitGetAccessorDeclaration(node);
+                case 154 /* SetAccessor */:
+                    return visitSetAccessorDeclaration(node);
+                case 228 /* FunctionDeclaration */:
+                    return visitFunctionDeclaration(node);
+                case 186 /* FunctionExpression */:
+                    return visitFunctionExpression(node);
+                case 187 /* ArrowFunction */:
+                    return visitArrowFunction(node);
+                case 146 /* Parameter */:
+                    return visitParameter(node);
+                case 210 /* ExpressionStatement */:
+                    return visitExpressionStatement(node);
+                case 185 /* ParenthesizedExpression */:
+                    return visitParenthesizedExpression(node, noDestructuringValue);
+                default:
+                    return ts.visitEachChild(node, visitor, context);
+            }
+        }
+        function visitAwaitExpression(node) {
+            if (enclosingFunctionFlags & 2 /* Async */ && enclosingFunctionFlags & 1 /* Generator */) {
+                return ts.setOriginalNode(ts.setTextRange(ts.createYield(createAwaitHelper(context, ts.visitNode(node.expression, visitor, ts.isExpression))), 
+                /*location*/ node), node);
+            }
+            return ts.visitEachChild(node, visitor, context);
         }
-        function createExternalModuleExport(exportName) {
-            return ts.createExportDeclaration(
-            /*decorators*/ undefined, 
-            /*modifiers*/ undefined, ts.createNamedExports([
-                ts.createExportSpecifier(exportName)
-            ]));
+        function visitYieldExpression(node) {
+            if (enclosingFunctionFlags & 2 /* Async */ && enclosingFunctionFlags & 1 /* Generator */ && node.asteriskToken) {
+                var expression = ts.visitNode(node.expression, visitor, ts.isExpression);
+                return ts.setOriginalNode(ts.setTextRange(ts.createYield(createAwaitHelper(context, ts.updateYield(node, node.asteriskToken, createAsyncDelegatorHelper(context, createAsyncValuesHelper(context, expression, expression), expression)))), node), node);
+            }
+            return ts.visitEachChild(node, visitor, context);
         }
-        function getNamespaceMemberName(name, allowComments, allowSourceMaps) {
-            var qualifiedName = ts.createPropertyAccess(currentNamespaceContainerName, ts.getSynthesizedClone(name), /*location*/ name);
-            var emitFlags;
-            if (!allowComments) {
-                emitFlags |= 49152 /* NoComments */;
+        function visitLabeledStatement(node) {
+            if (enclosingFunctionFlags & 2 /* Async */ && enclosingFunctionFlags & 1 /* Generator */) {
+                var statement = ts.unwrapInnermostStatementOfLabel(node);
+                if (statement.kind === 216 /* ForOfStatement */ && statement.awaitModifier) {
+                    return visitForOfStatement(statement, node);
+                }
+                return ts.restoreEnclosingLabel(ts.visitEachChild(node, visitor, context), node);
             }
-            if (!allowSourceMaps) {
-                emitFlags |= 1536 /* NoSourceMap */;
+            return ts.visitEachChild(node, visitor, context);
+        }
+        function chunkObjectLiteralElements(elements) {
+            var chunkObject;
+            var objects = [];
+            for (var _i = 0, elements_5 = elements; _i < elements_5.length; _i++) {
+                var e = elements_5[_i];
+                if (e.kind === 263 /* SpreadAssignment */) {
+                    if (chunkObject) {
+                        objects.push(ts.createObjectLiteral(chunkObject));
+                        chunkObject = undefined;
+                    }
+                    var target = e.expression;
+                    objects.push(ts.visitNode(target, visitor, ts.isExpression));
+                }
+                else {
+                    if (!chunkObject) {
+                        chunkObject = [];
+                    }
+                    if (e.kind === 261 /* PropertyAssignment */) {
+                        var p = e;
+                        chunkObject.push(ts.createPropertyAssignment(p.name, ts.visitNode(p.initializer, visitor, ts.isExpression)));
+                    }
+                    else {
+                        chunkObject.push(e);
+                    }
+                }
             }
-            if (emitFlags) {
-                ts.setEmitFlags(qualifiedName, emitFlags);
+            if (chunkObject) {
+                objects.push(ts.createObjectLiteral(chunkObject));
             }
-            return qualifiedName;
+            return objects;
         }
-        function getNamespaceMemberNameWithSourceMapsAndWithoutComments(name) {
-            return getNamespaceMemberName(name, /*allowComments*/ false, /*allowSourceMaps*/ true);
+        function visitObjectLiteralExpression(node) {
+            if (node.transformFlags & 1048576 /* ContainsObjectSpread */) {
+                // spread elements emit like so:
+                // non-spread elements are chunked together into object literals, and then all are passed to __assign:
+                //     { a, ...o, b } => __assign({a}, o, {b});
+                // If the first element is a spread element, then the first argument to __assign is {}:
+                //     { ...o, a, b, ...o2 } => __assign({}, o, {a, b}, o2)
+                var objects = chunkObjectLiteralElements(node.properties);
+                if (objects.length && objects[0].kind !== 178 /* ObjectLiteralExpression */) {
+                    objects.unshift(ts.createObjectLiteral());
+                }
+                return createAssignHelper(context, objects);
+            }
+            return ts.visitEachChild(node, visitor, context);
         }
-        /**
-         * Gets the declaration name used inside of a namespace or enum.
-         */
-        function getNamespaceParameterName(node) {
-            var name = ts.getGeneratedNameForNode(node);
-            ts.setSourceMapRange(name, node.name);
-            return name;
+        function visitExpressionStatement(node) {
+            return ts.visitEachChild(node, visitorNoDestructuringValue, context);
         }
-        /**
-         * Gets the expression used to refer to a namespace or enum within the body
-         * of its declaration.
-         */
-        function getNamespaceContainerName(node) {
-            return ts.getGeneratedNameForNode(node);
+        function visitParenthesizedExpression(node, noDestructuringValue) {
+            return ts.visitEachChild(node, noDestructuringValue ? visitorNoDestructuringValue : visitor, context);
         }
         /**
-         * Gets the local name for a declaration for use in expressions.
-         *
-         * A local name will *never* be prefixed with an module or namespace export modifier like
-         * "exports.".
+         * Visits a BinaryExpression that contains a destructuring assignment.
          *
-         * @param node The declaration.
-         * @param noSourceMaps A value indicating whether source maps may not be emitted for the name.
-         * @param allowComments A value indicating whether comments may be emitted for the name.
+         * @param node A BinaryExpression node.
          */
-        function getLocalName(node, noSourceMaps, allowComments) {
-            return getDeclarationName(node, allowComments, !noSourceMaps, 262144 /* LocalName */);
+        function visitBinaryExpression(node, noDestructuringValue) {
+            if (ts.isDestructuringAssignment(node) && node.left.transformFlags & 1048576 /* ContainsObjectRest */) {
+                return ts.flattenDestructuringAssignment(node, visitor, context, 1 /* ObjectRest */, !noDestructuringValue);
+            }
+            else if (node.operatorToken.kind === 26 /* CommaToken */) {
+                return ts.updateBinary(node, ts.visitNode(node.left, visitorNoDestructuringValue, ts.isExpression), ts.visitNode(node.right, noDestructuringValue ? visitorNoDestructuringValue : visitor, ts.isExpression));
+            }
+            return ts.visitEachChild(node, visitor, context);
         }
         /**
-         * Gets the export name for a declaration for use in expressions.
-         *
-         * An export name will *always* be prefixed with an module or namespace export modifier
-         * like "exports." if one is required.
+         * Visits a VariableDeclaration node with a binding pattern.
          *
-         * @param node The declaration.
-         * @param noSourceMaps A value indicating whether source maps may not be emitted for the name.
-         * @param allowComments A value indicating whether comments may be emitted for the name.
+         * @param node A VariableDeclaration node.
          */
-        function getExportName(node, noSourceMaps, allowComments) {
-            if (isNamespaceExport(node)) {
-                return getNamespaceMemberName(getDeclarationName(node), allowComments, !noSourceMaps);
+        function visitVariableDeclaration(node) {
+            // If we are here it is because the name contains a binding pattern with a rest somewhere in it.
+            if (ts.isBindingPattern(node.name) && node.name.transformFlags & 1048576 /* ContainsObjectRest */) {
+                return ts.flattenDestructuringBinding(node, visitor, context, 1 /* ObjectRest */);
             }
-            return getDeclarationName(node, allowComments, !noSourceMaps, 131072 /* ExportName */);
+            return ts.visitEachChild(node, visitor, context);
+        }
+        function visitForStatement(node) {
+            return ts.updateFor(node, ts.visitNode(node.initializer, visitorNoDestructuringValue, ts.isForInitializer), ts.visitNode(node.condition, visitor, ts.isExpression), ts.visitNode(node.incrementor, visitor, ts.isExpression), ts.visitNode(node.statement, visitor, ts.isStatement));
+        }
+        function visitVoidExpression(node) {
+            return ts.visitEachChild(node, visitorNoDestructuringValue, context);
         }
         /**
-         * Gets the name for a declaration for use in declarations.
+         * Visits a ForOfStatement and converts it into a ES2015-compatible ForOfStatement.
          *
-         * @param node The declaration.
-         * @param allowComments A value indicating whether comments may be emitted for the name.
-         * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
-         * @param emitFlags Additional NodeEmitFlags to specify for the name.
+         * @param node A ForOfStatement.
          */
-        function getDeclarationName(node, allowComments, allowSourceMaps, emitFlags) {
-            if (node.name) {
-                var name_32 = ts.getMutableClone(node.name);
-                emitFlags |= ts.getEmitFlags(node.name);
-                if (!allowSourceMaps) {
-                    emitFlags |= 1536 /* NoSourceMap */;
-                }
-                if (!allowComments) {
-                    emitFlags |= 49152 /* NoComments */;
-                }
-                if (emitFlags) {
-                    ts.setEmitFlags(name_32, emitFlags);
-                }
-                return name_32;
+        function visitForOfStatement(node, outermostLabeledStatement) {
+            if (node.initializer.transformFlags & 1048576 /* ContainsObjectRest */) {
+                node = transformForOfStatementWithObjectRest(node);
+            }
+            if (node.awaitModifier) {
+                return transformForAwaitOfStatement(node, outermostLabeledStatement);
             }
             else {
-                return ts.getGeneratedNameForNode(node);
+                return ts.restoreEnclosingLabel(ts.visitEachChild(node, visitor, context), outermostLabeledStatement);
+            }
+        }
+        function transformForOfStatementWithObjectRest(node) {
+            var initializerWithoutParens = ts.skipParentheses(node.initializer);
+            if (ts.isVariableDeclarationList(initializerWithoutParens) || ts.isAssignmentPattern(initializerWithoutParens)) {
+                var bodyLocation = void 0;
+                var statementsLocation = void 0;
+                var temp = ts.createTempVariable(/*recordTempVariable*/ undefined);
+                var statements = [ts.createForOfBindingStatement(initializerWithoutParens, temp)];
+                if (ts.isBlock(node.statement)) {
+                    ts.addRange(statements, node.statement.statements);
+                    bodyLocation = node.statement;
+                    statementsLocation = node.statement.statements;
+                }
+                return ts.updateForOf(node, node.awaitModifier, ts.setTextRange(ts.createVariableDeclarationList([
+                    ts.setTextRange(ts.createVariableDeclaration(temp), node.initializer)
+                ], 1 /* Let */), node.initializer), node.expression, ts.setTextRange(ts.createBlock(ts.setTextRange(ts.createNodeArray(statements), statementsLocation), 
+                /*multiLine*/ true), bodyLocation));
             }
+            return node;
         }
-        function getClassPrototype(node) {
-            return ts.createPropertyAccess(getDeclarationName(node), "prototype");
+        function convertForOfStatementHead(node, boundValue) {
+            var binding = ts.createForOfBindingStatement(node.initializer, boundValue);
+            var bodyLocation;
+            var statementsLocation;
+            var statements = [ts.visitNode(binding, visitor, ts.isStatement)];
+            var statement = ts.visitNode(node.statement, visitor, ts.isStatement);
+            if (ts.isBlock(statement)) {
+                ts.addRange(statements, statement.statements);
+                bodyLocation = statement;
+                statementsLocation = statement.statements;
+            }
+            else {
+                statements.push(statement);
+            }
+            return ts.setEmitFlags(ts.setTextRange(ts.createBlock(ts.setTextRange(ts.createNodeArray(statements), statementsLocation), 
+            /*multiLine*/ true), bodyLocation), 48 /* NoSourceMap */ | 384 /* NoTokenSourceMaps */);
         }
-        function getClassMemberPrefix(node, member) {
-            return ts.hasModifier(member, 32 /* Static */)
-                ? getDeclarationName(node)
-                : getClassPrototype(node);
+        function createDownlevelAwait(expression) {
+            return enclosingFunctionFlags & 1 /* Generator */
+                ? ts.createYield(/*asteriskToken*/ undefined, createAwaitHelper(context, expression))
+                : ts.createAwait(expression);
         }
-        function enableSubstitutionForNonQualifiedEnumMembers() {
-            if ((enabledSubstitutions & 8 /* NonQualifiedEnumMembers */) === 0) {
-                enabledSubstitutions |= 8 /* NonQualifiedEnumMembers */;
-                context.enableSubstitution(69 /* Identifier */);
-            }
+        function transformForAwaitOfStatement(node, outermostLabeledStatement) {
+            var expression = ts.visitNode(node.expression, visitor, ts.isExpression);
+            var iterator = ts.isIdentifier(expression) ? ts.getGeneratedNameForNode(expression) : ts.createTempVariable(/*recordTempVariable*/ undefined);
+            var result = ts.isIdentifier(expression) ? ts.getGeneratedNameForNode(iterator) : ts.createTempVariable(/*recordTempVariable*/ undefined);
+            var errorRecord = ts.createUniqueName("e");
+            var catchVariable = ts.getGeneratedNameForNode(errorRecord);
+            var returnMethod = ts.createTempVariable(/*recordTempVariable*/ undefined);
+            var callValues = createAsyncValuesHelper(context, expression, /*location*/ node.expression);
+            var callNext = ts.createCall(ts.createPropertyAccess(iterator, "next"), /*typeArguments*/ undefined, []);
+            var getDone = ts.createPropertyAccess(result, "done");
+            var getValue = ts.createPropertyAccess(result, "value");
+            var callReturn = ts.createFunctionCall(returnMethod, iterator, []);
+            hoistVariableDeclaration(errorRecord);
+            hoistVariableDeclaration(returnMethod);
+            var forStatement = ts.setEmitFlags(ts.setTextRange(ts.createFor(
+            /*initializer*/ ts.setEmitFlags(ts.setTextRange(ts.createVariableDeclarationList([
+                ts.setTextRange(ts.createVariableDeclaration(iterator, /*type*/ undefined, callValues), node.expression),
+                ts.createVariableDeclaration(result)
+            ]), node.expression), 2097152 /* NoHoisting */), 
+            /*condition*/ ts.createComma(ts.createAssignment(result, createDownlevelAwait(callNext)), ts.createLogicalNot(getDone)), 
+            /*incrementor*/ undefined, 
+            /*statement*/ convertForOfStatementHead(node, createDownlevelAwait(getValue))), 
+            /*location*/ node), 256 /* NoTokenTrailingSourceMaps */);
+            return ts.createTry(ts.createBlock([
+                ts.restoreEnclosingLabel(forStatement, outermostLabeledStatement)
+            ]), ts.createCatchClause(ts.createVariableDeclaration(catchVariable), ts.setEmitFlags(ts.createBlock([
+                ts.createStatement(ts.createAssignment(errorRecord, ts.createObjectLiteral([
+                    ts.createPropertyAssignment("error", catchVariable)
+                ])))
+            ]), 1 /* SingleLine */)), ts.createBlock([
+                ts.createTry(
+                /*tryBlock*/ ts.createBlock([
+                    ts.setEmitFlags(ts.createIf(ts.createLogicalAnd(ts.createLogicalAnd(result, ts.createLogicalNot(getDone)), ts.createAssignment(returnMethod, ts.createPropertyAccess(iterator, "return"))), ts.createStatement(createDownlevelAwait(callReturn))), 1 /* SingleLine */)
+                ]), 
+                /*catchClause*/ undefined, 
+                /*finallyBlock*/ ts.setEmitFlags(ts.createBlock([
+                    ts.setEmitFlags(ts.createIf(errorRecord, ts.createThrow(ts.createPropertyAccess(errorRecord, "error"))), 1 /* SingleLine */)
+                ]), 1 /* SingleLine */))
+            ]));
         }
-        function enableSubstitutionForAsyncMethodsWithSuper() {
-            if ((enabledSubstitutions & 4 /* AsyncMethodsWithSuper */) === 0) {
-                enabledSubstitutions |= 4 /* AsyncMethodsWithSuper */;
-                // We need to enable substitutions for call, property access, and element access
-                // if we need to rewrite super calls.
-                context.enableSubstitution(174 /* CallExpression */);
-                context.enableSubstitution(172 /* PropertyAccessExpression */);
-                context.enableSubstitution(173 /* ElementAccessExpression */);
-                // We need to be notified when entering and exiting declarations that bind super.
-                context.enableEmitNotification(221 /* ClassDeclaration */);
-                context.enableEmitNotification(147 /* MethodDeclaration */);
-                context.enableEmitNotification(149 /* GetAccessor */);
-                context.enableEmitNotification(150 /* SetAccessor */);
-                context.enableEmitNotification(148 /* Constructor */);
+        function visitParameter(node) {
+            if (node.transformFlags & 1048576 /* ContainsObjectRest */) {
+                // Binding patterns are converted into a generated name and are
+                // evaluated inside the function body.
+                return ts.updateParameter(node, 
+                /*decorators*/ undefined, 
+                /*modifiers*/ undefined, node.dotDotDotToken, ts.getGeneratedNameForNode(node), 
+                /*questionToken*/ undefined, 
+                /*type*/ undefined, ts.visitNode(node.initializer, visitor, ts.isExpression));
             }
+            return ts.visitEachChild(node, visitor, context);
         }
-        function enableSubstitutionForClassAliases() {
-            if ((enabledSubstitutions & 1 /* ClassAliases */) === 0) {
-                enabledSubstitutions |= 1 /* ClassAliases */;
-                // We need to enable substitutions for identifiers. This allows us to
-                // substitute class names inside of a class declaration.
-                context.enableSubstitution(69 /* Identifier */);
-                // Keep track of class aliases.
-                classAliases = ts.createMap();
-            }
+        function visitConstructorDeclaration(node) {
+            var savedEnclosingFunctionFlags = enclosingFunctionFlags;
+            enclosingFunctionFlags = 0 /* Normal */;
+            var updated = ts.updateConstructor(node, 
+            /*decorators*/ undefined, node.modifiers, ts.visitParameterList(node.parameters, visitor, context), transformFunctionBody(node));
+            enclosingFunctionFlags = savedEnclosingFunctionFlags;
+            return updated;
         }
-        function enableSubstitutionForNamespaceExports() {
-            if ((enabledSubstitutions & 2 /* NamespaceExports */) === 0) {
-                enabledSubstitutions |= 2 /* NamespaceExports */;
-                // We need to enable substitutions for identifiers and shorthand property assignments. This allows us to
-                // substitute the names of exported members of a namespace.
-                context.enableSubstitution(69 /* Identifier */);
-                context.enableSubstitution(254 /* ShorthandPropertyAssignment */);
-                // We need to be notified when entering and exiting namespaces.
-                context.enableEmitNotification(225 /* ModuleDeclaration */);
+        function visitGetAccessorDeclaration(node) {
+            var savedEnclosingFunctionFlags = enclosingFunctionFlags;
+            enclosingFunctionFlags = 0 /* Normal */;
+            var updated = ts.updateGetAccessor(node, 
+            /*decorators*/ undefined, node.modifiers, ts.visitNode(node.name, visitor, ts.isPropertyName), ts.visitParameterList(node.parameters, visitor, context), 
+            /*type*/ undefined, transformFunctionBody(node));
+            enclosingFunctionFlags = savedEnclosingFunctionFlags;
+            return updated;
+        }
+        function visitSetAccessorDeclaration(node) {
+            var savedEnclosingFunctionFlags = enclosingFunctionFlags;
+            enclosingFunctionFlags = 0 /* Normal */;
+            var updated = ts.updateSetAccessor(node, 
+            /*decorators*/ undefined, node.modifiers, ts.visitNode(node.name, visitor, ts.isPropertyName), ts.visitParameterList(node.parameters, visitor, context), transformFunctionBody(node));
+            enclosingFunctionFlags = savedEnclosingFunctionFlags;
+            return updated;
+        }
+        function visitMethodDeclaration(node) {
+            var savedEnclosingFunctionFlags = enclosingFunctionFlags;
+            enclosingFunctionFlags = ts.getFunctionFlags(node);
+            var updated = ts.updateMethod(node, 
+            /*decorators*/ undefined, enclosingFunctionFlags & 1 /* Generator */
+                ? ts.visitNodes(node.modifiers, visitorNoAsyncModifier, ts.isModifier)
+                : node.modifiers, enclosingFunctionFlags & 2 /* Async */
+                ? undefined
+                : node.asteriskToken, ts.visitNode(node.name, visitor, ts.isPropertyName), ts.visitNode(/*questionToken*/ undefined, visitor, ts.isToken), 
+            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
+            /*type*/ undefined, enclosingFunctionFlags & 2 /* Async */ && enclosingFunctionFlags & 1 /* Generator */
+                ? transformAsyncGeneratorFunctionBody(node)
+                : transformFunctionBody(node));
+            enclosingFunctionFlags = savedEnclosingFunctionFlags;
+            return updated;
+        }
+        function visitFunctionDeclaration(node) {
+            var savedEnclosingFunctionFlags = enclosingFunctionFlags;
+            enclosingFunctionFlags = ts.getFunctionFlags(node);
+            var updated = ts.updateFunctionDeclaration(node, 
+            /*decorators*/ undefined, enclosingFunctionFlags & 1 /* Generator */
+                ? ts.visitNodes(node.modifiers, visitorNoAsyncModifier, ts.isModifier)
+                : node.modifiers, enclosingFunctionFlags & 2 /* Async */
+                ? undefined
+                : node.asteriskToken, node.name, 
+            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
+            /*type*/ undefined, enclosingFunctionFlags & 2 /* Async */ && enclosingFunctionFlags & 1 /* Generator */
+                ? transformAsyncGeneratorFunctionBody(node)
+                : transformFunctionBody(node));
+            enclosingFunctionFlags = savedEnclosingFunctionFlags;
+            return updated;
+        }
+        function visitArrowFunction(node) {
+            var savedEnclosingFunctionFlags = enclosingFunctionFlags;
+            enclosingFunctionFlags = ts.getFunctionFlags(node);
+            var updated = ts.updateArrowFunction(node, node.modifiers, 
+            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
+            /*type*/ undefined, transformFunctionBody(node));
+            enclosingFunctionFlags = savedEnclosingFunctionFlags;
+            return updated;
+        }
+        function visitFunctionExpression(node) {
+            var savedEnclosingFunctionFlags = enclosingFunctionFlags;
+            enclosingFunctionFlags = ts.getFunctionFlags(node);
+            var updated = ts.updateFunctionExpression(node, enclosingFunctionFlags & 1 /* Generator */
+                ? ts.visitNodes(node.modifiers, visitorNoAsyncModifier, ts.isModifier)
+                : node.modifiers, enclosingFunctionFlags & 2 /* Async */
+                ? undefined
+                : node.asteriskToken, node.name, 
+            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
+            /*type*/ undefined, enclosingFunctionFlags & 2 /* Async */ && enclosingFunctionFlags & 1 /* Generator */
+                ? transformAsyncGeneratorFunctionBody(node)
+                : transformFunctionBody(node));
+            enclosingFunctionFlags = savedEnclosingFunctionFlags;
+            return updated;
+        }
+        function transformAsyncGeneratorFunctionBody(node) {
+            resumeLexicalEnvironment();
+            var statements = [];
+            var statementOffset = ts.addPrologue(statements, node.body.statements, /*ensureUseStrict*/ false, visitor);
+            appendObjectRestAssignmentsIfNeeded(statements, node);
+            statements.push(ts.createReturn(createAsyncGeneratorHelper(context, ts.createFunctionExpression(
+            /*modifiers*/ undefined, ts.createToken(39 /* AsteriskToken */), node.name && ts.getGeneratedNameForNode(node.name), 
+            /*typeParameters*/ undefined, 
+            /*parameters*/ [], 
+            /*type*/ undefined, ts.updateBlock(node.body, ts.visitLexicalEnvironment(node.body.statements, visitor, context, statementOffset))))));
+            ts.addRange(statements, endLexicalEnvironment());
+            var block = ts.updateBlock(node.body, statements);
+            // Minor optimization, emit `_super` helper to capture `super` access in an arrow.
+            // This step isn't needed if we eventually transform this to ES5.
+            if (languageVersion >= 2 /* ES2015 */) {
+                if (resolver.getNodeCheckFlags(node) & 4096 /* AsyncMethodWithSuperBinding */) {
+                    enableSubstitutionForAsyncMethodsWithSuper();
+                    ts.addEmitHelper(block, ts.advancedAsyncSuperHelper);
+                }
+                else if (resolver.getNodeCheckFlags(node) & 2048 /* AsyncMethodWithSuper */) {
+                    enableSubstitutionForAsyncMethodsWithSuper();
+                    ts.addEmitHelper(block, ts.asyncSuperHelper);
+                }
             }
+            return block;
         }
-        function isSuperContainer(node) {
-            var kind = node.kind;
-            return kind === 221 /* ClassDeclaration */
-                || kind === 148 /* Constructor */
-                || kind === 147 /* MethodDeclaration */
-                || kind === 149 /* GetAccessor */
-                || kind === 150 /* SetAccessor */;
+        function transformFunctionBody(node) {
+            resumeLexicalEnvironment();
+            var statementOffset = 0;
+            var statements = [];
+            var body = ts.visitNode(node.body, visitor, ts.isConciseBody);
+            if (ts.isBlock(body)) {
+                statementOffset = ts.addPrologue(statements, body.statements, /*ensureUseStrict*/ false, visitor);
+            }
+            ts.addRange(statements, appendObjectRestAssignmentsIfNeeded(/*statements*/ undefined, node));
+            var trailingStatements = endLexicalEnvironment();
+            if (statementOffset > 0 || ts.some(statements) || ts.some(trailingStatements)) {
+                var block = ts.convertToFunctionBody(body, /*multiLine*/ true);
+                ts.addRange(statements, block.statements.slice(statementOffset));
+                ts.addRange(statements, trailingStatements);
+                return ts.updateBlock(block, ts.setTextRange(ts.createNodeArray(statements), block.statements));
+            }
+            return body;
         }
-        function isTransformedModuleDeclaration(node) {
-            return ts.getOriginalNode(node).kind === 225 /* ModuleDeclaration */;
+        function appendObjectRestAssignmentsIfNeeded(statements, node) {
+            for (var _i = 0, _a = node.parameters; _i < _a.length; _i++) {
+                var parameter = _a[_i];
+                if (parameter.transformFlags & 1048576 /* ContainsObjectRest */) {
+                    var temp = ts.getGeneratedNameForNode(parameter);
+                    var declarations = ts.flattenDestructuringBinding(parameter, visitor, context, 1 /* ObjectRest */, temp, 
+                    /*doNotRecordTempVariablesInLine*/ false, 
+                    /*skipInitializer*/ true);
+                    if (ts.some(declarations)) {
+                        var statement = ts.createVariableStatement(
+                        /*modifiers*/ undefined, ts.createVariableDeclarationList(declarations));
+                        ts.setEmitFlags(statement, 1048576 /* CustomPrologue */);
+                        statements = ts.append(statements, statement);
+                    }
+                }
+            }
+            return statements;
         }
-        function isTransformedEnumDeclaration(node) {
-            return ts.getOriginalNode(node).kind === 224 /* EnumDeclaration */;
+        function enableSubstitutionForAsyncMethodsWithSuper() {
+            if ((enabledSubstitutions & 1 /* AsyncMethodsWithSuper */) === 0) {
+                enabledSubstitutions |= 1 /* AsyncMethodsWithSuper */;
+                // We need to enable substitutions for call, property access, and element access
+                // if we need to rewrite super calls.
+                context.enableSubstitution(181 /* CallExpression */);
+                context.enableSubstitution(179 /* PropertyAccessExpression */);
+                context.enableSubstitution(180 /* ElementAccessExpression */);
+                // We need to be notified when entering and exiting declarations that bind super.
+                context.enableEmitNotification(229 /* ClassDeclaration */);
+                context.enableEmitNotification(151 /* MethodDeclaration */);
+                context.enableEmitNotification(153 /* GetAccessor */);
+                context.enableEmitNotification(154 /* SetAccessor */);
+                context.enableEmitNotification(152 /* Constructor */);
+            }
         }
         /**
-         * Hook for node emit.
+         * Called by the printer just before a node is printed.
          *
-         * @param node The node to emit.
-         * @param emit A callback used to emit the node in the printer.
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to be printed.
+         * @param emitCallback The callback used to emit the node.
          */
-        function onEmitNode(emitContext, node, emitCallback) {
-            var savedApplicableSubstitutions = applicableSubstitutions;
-            var savedCurrentSuperContainer = currentSuperContainer;
+        function onEmitNode(hint, node, emitCallback) {
             // If we need to support substitutions for `super` in an async method,
             // we should track it here.
-            if (enabledSubstitutions & 4 /* AsyncMethodsWithSuper */ && isSuperContainer(node)) {
-                currentSuperContainer = node;
-            }
-            if (enabledSubstitutions & 2 /* NamespaceExports */ && isTransformedModuleDeclaration(node)) {
-                applicableSubstitutions |= 2 /* NamespaceExports */;
-            }
-            if (enabledSubstitutions & 8 /* NonQualifiedEnumMembers */ && isTransformedEnumDeclaration(node)) {
-                applicableSubstitutions |= 8 /* NonQualifiedEnumMembers */;
+            if (enabledSubstitutions & 1 /* AsyncMethodsWithSuper */ && isSuperContainer(node)) {
+                var superContainerFlags = resolver.getNodeCheckFlags(node) & (2048 /* AsyncMethodWithSuper */ | 4096 /* AsyncMethodWithSuperBinding */);
+                if (superContainerFlags !== enclosingSuperContainerFlags) {
+                    var savedEnclosingSuperContainerFlags = enclosingSuperContainerFlags;
+                    enclosingSuperContainerFlags = superContainerFlags;
+                    previousOnEmitNode(hint, node, emitCallback);
+                    enclosingSuperContainerFlags = savedEnclosingSuperContainerFlags;
+                    return;
+                }
             }
-            previousOnEmitNode(emitContext, node, emitCallback);
-            applicableSubstitutions = savedApplicableSubstitutions;
-            currentSuperContainer = savedCurrentSuperContainer;
+            previousOnEmitNode(hint, node, emitCallback);
         }
         /**
          * Hooks node substitutions.
          *
+         * @param hint The context for the emitter.
          * @param node The node to substitute.
-         * @param isExpression A value indicating whether the node is to be used in an expression
-         *                     position.
          */
-        function onSubstituteNode(emitContext, node) {
-            node = previousOnSubstituteNode(emitContext, node);
-            if (emitContext === 1 /* Expression */) {
+        function onSubstituteNode(hint, node) {
+            node = previousOnSubstituteNode(hint, node);
+            if (hint === 1 /* Expression */ && enclosingSuperContainerFlags) {
                 return substituteExpression(node);
             }
-            else if (ts.isShorthandPropertyAssignment(node)) {
-                return substituteShorthandPropertyAssignment(node);
-            }
-            return node;
-        }
-        function substituteShorthandPropertyAssignment(node) {
-            if (enabledSubstitutions & 2 /* NamespaceExports */) {
-                var name_33 = node.name;
-                var exportedName = trySubstituteNamespaceExportedName(name_33);
-                if (exportedName) {
-                    // A shorthand property with an assignment initializer is probably part of a
-                    // destructuring assignment
-                    if (node.objectAssignmentInitializer) {
-                        var initializer = ts.createAssignment(exportedName, node.objectAssignmentInitializer);
-                        return ts.createPropertyAssignment(name_33, initializer, /*location*/ node);
-                    }
-                    return ts.createPropertyAssignment(name_33, exportedName, /*location*/ node);
-                }
-            }
             return node;
         }
         function substituteExpression(node) {
             switch (node.kind) {
-                case 69 /* Identifier */:
-                    return substituteExpressionIdentifier(node);
-                case 172 /* PropertyAccessExpression */:
+                case 179 /* PropertyAccessExpression */:
                     return substitutePropertyAccessExpression(node);
-                case 173 /* ElementAccessExpression */:
+                case 180 /* ElementAccessExpression */:
                     return substituteElementAccessExpression(node);
-                case 174 /* CallExpression */:
-                    if (enabledSubstitutions & 4 /* AsyncMethodsWithSuper */) {
-                        return substituteCallExpression(node);
-                    }
-                    break;
+                case 181 /* CallExpression */:
+                    return substituteCallExpression(node);
             }
             return node;
         }
-        function substituteExpressionIdentifier(node) {
-            return trySubstituteClassAlias(node)
-                || trySubstituteNamespaceExportedName(node)
-                || node;
-        }
-        function trySubstituteClassAlias(node) {
-            if (enabledSubstitutions & 1 /* ClassAliases */) {
-                if (resolver.getNodeCheckFlags(node) & 16777216 /* ConstructorReferenceInClass */) {
-                    // Due to the emit for class decorators, any reference to the class from inside of the class body
-                    // must instead be rewritten to point to a temporary variable to avoid issues with the double-bind
-                    // behavior of class names in ES6.
-                    // Also, when emitting statics for class expressions, we must substitute a class alias for
-                    // constructor references in static property initializers.
-                    var declaration = resolver.getReferencedValueDeclaration(node);
-                    if (declaration) {
-                        var classAlias = classAliases[declaration.id];
-                        if (classAlias) {
-                            var clone_4 = ts.getSynthesizedClone(classAlias);
-                            ts.setSourceMapRange(clone_4, node);
-                            ts.setCommentRange(clone_4, node);
-                            return clone_4;
-                        }
-                    }
-                }
+        function substitutePropertyAccessExpression(node) {
+            if (node.expression.kind === 97 /* SuperKeyword */) {
+                return createSuperAccessInAsyncMethod(ts.createLiteral(node.name.text), node);
             }
-            return undefined;
+            return node;
         }
-        function trySubstituteNamespaceExportedName(node) {
-            // If this is explicitly a local name, do not substitute.
-            if (enabledSubstitutions & applicableSubstitutions && (ts.getEmitFlags(node) & 262144 /* LocalName */) === 0) {
-                // If we are nested within a namespace declaration, we may need to qualifiy
-                // an identifier that is exported from a merged namespace.
-                var container = resolver.getReferencedExportContainer(node, /*prefixLocals*/ false);
-                if (container) {
-                    var substitute = (applicableSubstitutions & 2 /* NamespaceExports */ && container.kind === 225 /* ModuleDeclaration */) ||
-                        (applicableSubstitutions & 8 /* NonQualifiedEnumMembers */ && container.kind === 224 /* EnumDeclaration */);
-                    if (substitute) {
-                        return ts.createPropertyAccess(ts.getGeneratedNameForNode(container), node, /*location*/ node);
-                    }
-                }
+        function substituteElementAccessExpression(node) {
+            if (node.expression.kind === 97 /* SuperKeyword */) {
+                return createSuperAccessInAsyncMethod(node.argumentExpression, node);
             }
-            return undefined;
+            return node;
         }
         function substituteCallExpression(node) {
             var expression = node.expression;
             if (ts.isSuperProperty(expression)) {
-                var flags = getSuperContainerAsyncMethodFlags();
-                if (flags) {
-                    var argumentExpression = ts.isPropertyAccessExpression(expression)
-                        ? substitutePropertyAccessExpression(expression)
-                        : substituteElementAccessExpression(expression);
-                    return ts.createCall(ts.createPropertyAccess(argumentExpression, "call"), 
-                    /*typeArguments*/ undefined, [
-                        ts.createThis()
-                    ].concat(node.arguments));
-                }
-            }
-            return node;
-        }
-        function substitutePropertyAccessExpression(node) {
-            if (enabledSubstitutions & 4 /* AsyncMethodsWithSuper */ && node.expression.kind === 95 /* SuperKeyword */) {
-                var flags = getSuperContainerAsyncMethodFlags();
-                if (flags) {
-                    return createSuperAccessInAsyncMethod(ts.createLiteral(node.name.text), flags, node);
-                }
-            }
-            return substituteConstantValue(node);
-        }
-        function substituteElementAccessExpression(node) {
-            if (enabledSubstitutions & 4 /* AsyncMethodsWithSuper */ && node.expression.kind === 95 /* SuperKeyword */) {
-                var flags = getSuperContainerAsyncMethodFlags();
-                if (flags) {
-                    return createSuperAccessInAsyncMethod(node.argumentExpression, flags, node);
-                }
-            }
-            return substituteConstantValue(node);
-        }
-        function substituteConstantValue(node) {
-            var constantValue = tryGetConstEnumValue(node);
-            if (constantValue !== undefined) {
-                var substitute = ts.createLiteral(constantValue);
-                ts.setSourceMapRange(substitute, node);
-                ts.setCommentRange(substitute, node);
-                if (!compilerOptions.removeComments) {
-                    var propertyName = ts.isPropertyAccessExpression(node)
-                        ? ts.declarationNameToString(node.name)
-                        : ts.getTextOfNode(node.argumentExpression);
-                    substitute.trailingComment = " " + propertyName + " ";
-                }
-                ts.setConstantValue(node, constantValue);
-                return substitute;
+                var argumentExpression = ts.isPropertyAccessExpression(expression)
+                    ? substitutePropertyAccessExpression(expression)
+                    : substituteElementAccessExpression(expression);
+                return ts.createCall(ts.createPropertyAccess(argumentExpression, "call"), 
+                /*typeArguments*/ undefined, [
+                    ts.createThis()
+                ].concat(node.arguments));
             }
             return node;
         }
-        function tryGetConstEnumValue(node) {
-            if (compilerOptions.isolatedModules) {
-                return undefined;
-            }
-            return ts.isPropertyAccessExpression(node) || ts.isElementAccessExpression(node)
-                ? resolver.getConstantValue(node)
-                : undefined;
+        function isSuperContainer(node) {
+            var kind = node.kind;
+            return kind === 229 /* ClassDeclaration */
+                || kind === 152 /* Constructor */
+                || kind === 151 /* MethodDeclaration */
+                || kind === 153 /* GetAccessor */
+                || kind === 154 /* SetAccessor */;
         }
-        function createSuperAccessInAsyncMethod(argumentExpression, flags, location) {
-            if (flags & 4096 /* AsyncMethodWithSuperBinding */) {
-                return ts.createPropertyAccess(ts.createCall(ts.createIdentifier("_super"), 
-                /*typeArguments*/ undefined, [argumentExpression]), "value", location);
+        function createSuperAccessInAsyncMethod(argumentExpression, location) {
+            if (enclosingSuperContainerFlags & 4096 /* AsyncMethodWithSuperBinding */) {
+                return ts.setTextRange(ts.createPropertyAccess(ts.createCall(ts.createIdentifier("_super"), 
+                /*typeArguments*/ undefined, [argumentExpression]), "value"), location);
             }
             else {
-                return ts.createCall(ts.createIdentifier("_super"), 
-                /*typeArguments*/ undefined, [argumentExpression], location);
+                return ts.setTextRange(ts.createCall(ts.createIdentifier("_super"), 
+                /*typeArguments*/ undefined, [argumentExpression]), location);
             }
         }
-        function getSuperContainerAsyncMethodFlags() {
-            return currentSuperContainer !== undefined
-                && resolver.getNodeCheckFlags(currentSuperContainer) & (2048 /* AsyncMethodWithSuper */ | 4096 /* AsyncMethodWithSuperBinding */);
+    }
+    ts.transformESNext = transformESNext;
+    var assignHelper = {
+        name: "typescript:assign",
+        scoped: false,
+        priority: 1,
+        text: "\n            var __assign = (this && this.__assign) || Object.assign || function(t) {\n                for (var s, i = 1, n = arguments.length; i < n; i++) {\n                    s = arguments[i];\n                    for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))\n                        t[p] = s[p];\n                }\n                return t;\n            };"
+    };
+    function createAssignHelper(context, attributesSegments) {
+        if (context.getCompilerOptions().target >= 2 /* ES2015 */) {
+            return ts.createCall(ts.createPropertyAccess(ts.createIdentifier("Object"), "assign"), 
+            /*typeArguments*/ undefined, attributesSegments);
         }
+        context.requestEmitHelper(assignHelper);
+        return ts.createCall(ts.getHelperName("__assign"), 
+        /*typeArguments*/ undefined, attributesSegments);
+    }
+    ts.createAssignHelper = createAssignHelper;
+    var awaitHelper = {
+        name: "typescript:await",
+        scoped: false,
+        text: "\n            var __await = (this && this.__await) || function (v) { return this instanceof __await ? (this.v = v, this) : new __await(v); }\n        "
+    };
+    function createAwaitHelper(context, expression) {
+        context.requestEmitHelper(awaitHelper);
+        return ts.createCall(ts.getHelperName("__await"), /*typeArguments*/ undefined, [expression]);
+    }
+    var asyncGeneratorHelper = {
+        name: "typescript:asyncGenerator",
+        scoped: false,
+        text: "\n            var __asyncGenerator = (this && this.__asyncGenerator) || function (thisArg, _arguments, generator) {\n                if (!Symbol.asyncIterator) throw new TypeError(\"Symbol.asyncIterator is not defined.\");\n                var g = generator.apply(thisArg, _arguments || []), i, q = [];\n                return i = {}, verb(\"next\"), verb(\"throw\"), verb(\"return\"), i[Symbol.asyncIterator] = function () { return this; }, i;\n                function verb(n) { if (g[n]) i[n] = function (v) { return new Promise(function (a, b) { q.push([n, v, a, b]) > 1 || resume(n, v); }); }; }\n                function resume(n, v) { try { step(g[n](v)); } catch (e) { settle(q[0][3], e); } }\n                function step(r) { r.value instanceof __await ? Promise.resolve(r.value.v).then(fulfill, reject) : settle(q[0][2], r);  }\n                function fulfill(value) { resume(\"next\", value); }\n                function reject(value) { resume(\"throw\", value); }\n                function settle(f, v) { if (f(v), q.shift(), q.length) resume(q[0][0], q[0][1]); }\n            };\n        "
+    };
+    function createAsyncGeneratorHelper(context, generatorFunc) {
+        context.requestEmitHelper(awaitHelper);
+        context.requestEmitHelper(asyncGeneratorHelper);
+        // Mark this node as originally an async function
+        (generatorFunc.emitNode || (generatorFunc.emitNode = {})).flags |= 262144 /* AsyncFunctionBody */;
+        return ts.createCall(ts.getHelperName("__asyncGenerator"), 
+        /*typeArguments*/ undefined, [
+            ts.createThis(),
+            ts.createIdentifier("arguments"),
+            generatorFunc
+        ]);
+    }
+    var asyncDelegator = {
+        name: "typescript:asyncDelegator",
+        scoped: false,
+        text: "\n            var __asyncDelegator = (this && this.__asyncDelegator) || function (o) {\n                var i, p;\n                return i = {}, verb(\"next\"), verb(\"throw\", function (e) { throw e; }), verb(\"return\"), i[Symbol.iterator] = function () { return this; }, i;\n                function verb(n, f) { if (o[n]) i[n] = function (v) { return (p = !p) ? { value: __await(o[n](v)), done: n === \"return\" } : f ? f(v) : v; }; }\n            };\n        "
+    };
+    function createAsyncDelegatorHelper(context, expression, location) {
+        context.requestEmitHelper(awaitHelper);
+        context.requestEmitHelper(asyncDelegator);
+        return ts.setTextRange(ts.createCall(ts.getHelperName("__asyncDelegator"), 
+        /*typeArguments*/ undefined, [expression]), location);
+    }
+    var asyncValues = {
+        name: "typescript:asyncValues",
+        scoped: false,
+        text: "\n            var __asyncValues = (this && this.__asyncIterator) || function (o) {\n                if (!Symbol.asyncIterator) throw new TypeError(\"Symbol.asyncIterator is not defined.\");\n                var m = o[Symbol.asyncIterator];\n                return m ? m.call(o) : typeof __values === \"function\" ? __values(o) : o[Symbol.iterator]();\n            };\n        "
+    };
+    function createAsyncValuesHelper(context, expression, location) {
+        context.requestEmitHelper(asyncValues);
+        return ts.setTextRange(ts.createCall(ts.getHelperName("__asyncValues"), 
+        /*typeArguments*/ undefined, [expression]), location);
     }
-    ts.transformTypeScript = transformTypeScript;
 })(ts || (ts = {}));
 /// <reference path="../factory.ts" />
 /// <reference path="../visitor.ts" />
+/// <reference path="./esnext.ts" />
 /*@internal*/
 var ts;
 (function (ts) {
-    var entities = createEntitiesMap();
     function transformJsx(context) {
         var compilerOptions = context.getCompilerOptions();
-        var currentSourceFile;
         return transformSourceFile;
         /**
          * Transform JSX-specific syntax in a SourceFile.
@@ -48058,47 +58100,42 @@ var ts;
          * @param node A SourceFile node.
          */
         function transformSourceFile(node) {
-            if (ts.isDeclarationFile(node)) {
+            if (node.isDeclarationFile) {
                 return node;
             }
-            currentSourceFile = node;
-            node = ts.visitEachChild(node, visitor, context);
-            currentSourceFile = undefined;
-            return node;
+            var visited = ts.visitEachChild(node, visitor, context);
+            ts.addEmitHelpers(visited, context.readEmitHelpers());
+            return visited;
         }
         function visitor(node) {
-            if (node.transformFlags & 4 /* Jsx */) {
+            if (node.transformFlags & 4 /* ContainsJsx */) {
                 return visitorWorker(node);
             }
-            else if (node.transformFlags & 8 /* ContainsJsx */) {
-                return ts.visitEachChild(node, visitor, context);
-            }
             else {
                 return node;
             }
         }
         function visitorWorker(node) {
             switch (node.kind) {
-                case 241 /* JsxElement */:
+                case 249 /* JsxElement */:
                     return visitJsxElement(node, /*isChild*/ false);
-                case 242 /* JsxSelfClosingElement */:
+                case 250 /* JsxSelfClosingElement */:
                     return visitJsxSelfClosingElement(node, /*isChild*/ false);
-                case 248 /* JsxExpression */:
+                case 256 /* JsxExpression */:
                     return visitJsxExpression(node);
                 default:
-                    ts.Debug.failBadSyntaxKind(node);
-                    return undefined;
+                    return ts.visitEachChild(node, visitor, context);
             }
         }
         function transformJsxChildToExpression(node) {
             switch (node.kind) {
-                case 244 /* JsxText */:
+                case 10 /* JsxText */:
                     return visitJsxText(node);
-                case 248 /* JsxExpression */:
+                case 256 /* JsxExpression */:
                     return visitJsxExpression(node);
-                case 241 /* JsxElement */:
+                case 249 /* JsxElement */:
                     return visitJsxElement(node, /*isChild*/ true);
-                case 242 /* JsxSelfClosingElement */:
+                case 250 /* JsxSelfClosingElement */:
                     return visitJsxSelfClosingElement(node, /*isChild*/ true);
                 default:
                     ts.Debug.failBadSyntaxKind(node);
@@ -48114,7 +58151,7 @@ var ts;
         function visitJsxOpeningLikeElement(node, children, isChild, location) {
             var tagName = getTagName(node);
             var objectProperties;
-            var attrs = node.attributes;
+            var attrs = node.attributes.properties;
             if (attrs.length === 0) {
                 // When there are no attributes, React wants "null"
                 objectProperties = ts.createNull();
@@ -48132,10 +58169,12 @@ var ts;
                 }
                 // Either emit one big object literal (no spread attribs), or
                 // a call to the __assign helper.
-                objectProperties = ts.singleOrUndefined(segments)
-                    || ts.createAssignHelper(currentSourceFile.externalHelpersModuleName, segments);
+                objectProperties = ts.singleOrUndefined(segments);
+                if (!objectProperties) {
+                    objectProperties = ts.createAssignHelper(context, segments);
+                }
             }
-            var element = ts.createReactCreateElement(compilerOptions.reactNamespace, tagName, objectProperties, ts.filter(ts.map(children, transformJsxChildToExpression), ts.isDefined), node, location);
+            var element = ts.createExpressionForJsxElement(context.getEmitResolver().getJsxFactoryEntity(), compilerOptions.reactNamespace, tagName, objectProperties, ts.filter(ts.map(children, transformJsxChildToExpression), ts.isDefined), node, location);
             if (isChild) {
                 ts.startOnNewLine(element);
             }
@@ -48151,13 +58190,16 @@ var ts;
         }
         function transformJsxAttributeInitializer(node) {
             if (node === undefined) {
-                return ts.createLiteral(true);
+                return ts.createTrue();
             }
             else if (node.kind === 9 /* StringLiteral */) {
                 var decoded = tryDecodeEntities(node.text);
-                return decoded ? ts.createLiteral(decoded, /*location*/ node) : node;
+                return decoded ? ts.setTextRange(ts.createLiteral(decoded), node) : node;
             }
-            else if (node.kind === 248 /* JsxExpression */) {
+            else if (node.kind === 256 /* JsxExpression */) {
+                if (node.expression === undefined) {
+                    return ts.createTrue();
+                }
                 return visitJsxExpression(node);
             }
             else {
@@ -48165,54 +58207,61 @@ var ts;
             }
         }
         function visitJsxText(node) {
-            var text = ts.getTextOfNode(node, /*includeTrivia*/ true);
-            var parts;
+            var fixed = fixupWhitespaceAndDecodeEntities(ts.getTextOfNode(node, /*includeTrivia*/ true));
+            return fixed === undefined ? undefined : ts.createLiteral(fixed);
+        }
+        /**
+         * JSX trims whitespace at the end and beginning of lines, except that the
+         * start/end of a tag is considered a start/end of a line only if that line is
+         * on the same line as the closing tag. See examples in
+         * tests/cases/conformance/jsx/tsxReactEmitWhitespace.tsx
+         * See also https://www.w3.org/TR/html4/struct/text.html#h-9.1 and https://www.w3.org/TR/CSS2/text.html#white-space-model
+         *
+         * An equivalent algorithm would be:
+         * - If there is only one line, return it.
+         * - If there is only whitespace (but multiple lines), return `undefined`.
+         * - Split the text into lines.
+         * - 'trimRight' the first line, 'trimLeft' the last line, 'trim' middle lines.
+         * - Decode entities on each line (individually).
+         * - Remove empty lines and join the rest with " ".
+         */
+        function fixupWhitespaceAndDecodeEntities(text) {
+            var acc;
+            // First non-whitespace character on this line.
             var firstNonWhitespace = 0;
+            // Last non-whitespace character on this line.
             var lastNonWhitespace = -1;
-            // JSX trims whitespace at the end and beginning of lines, except that the
-            // start/end of a tag is considered a start/end of a line only if that line is
-            // on the same line as the closing tag. See examples in
-            // tests/cases/conformance/jsx/tsxReactEmitWhitespace.tsx
+            // These initial values are special because the first line is:
+            // firstNonWhitespace = 0 to indicate that we want leading whitsepace,
+            // but lastNonWhitespace = -1 as a special flag to indicate that we *don't* include the line if it's all whitespace.
             for (var i = 0; i < text.length; i++) {
                 var c = text.charCodeAt(i);
                 if (ts.isLineBreak(c)) {
-                    if (firstNonWhitespace !== -1 && (lastNonWhitespace - firstNonWhitespace + 1 > 0)) {
-                        var part = text.substr(firstNonWhitespace, lastNonWhitespace - firstNonWhitespace + 1);
-                        if (!parts) {
-                            parts = [];
-                        }
-                        // We do not escape the string here as that is handled by the printer
-                        // when it emits the literal. We do, however, need to decode JSX entities.
-                        parts.push(ts.createLiteral(decodeEntities(part)));
+                    // If we've seen any non-whitespace characters on this line, add the 'trim' of the line.
+                    // (lastNonWhitespace === -1 is a special flag to detect whether the first line is all whitespace.)
+                    if (firstNonWhitespace !== -1 && lastNonWhitespace !== -1) {
+                        acc = addLineOfJsxText(acc, text.substr(firstNonWhitespace, lastNonWhitespace - firstNonWhitespace + 1));
                     }
+                    // Reset firstNonWhitespace for the next line.
+                    // Don't bother to reset lastNonWhitespace because we ignore it if firstNonWhitespace = -1.
                     firstNonWhitespace = -1;
                 }
-                else if (!ts.isWhiteSpace(c)) {
+                else if (!ts.isWhiteSpaceSingleLine(c)) {
                     lastNonWhitespace = i;
                     if (firstNonWhitespace === -1) {
                         firstNonWhitespace = i;
                     }
                 }
             }
-            if (firstNonWhitespace !== -1) {
-                var part = text.substr(firstNonWhitespace);
-                if (!parts) {
-                    parts = [];
-                }
-                // We do not escape the string here as that is handled by the printer
-                // when it emits the literal. We do, however, need to decode JSX entities.
-                parts.push(ts.createLiteral(decodeEntities(part)));
-            }
-            if (parts) {
-                return ts.reduceLeft(parts, aggregateJsxTextParts);
-            }
-            return undefined;
+            return firstNonWhitespace !== -1
+                ? addLineOfJsxText(acc, text.substr(firstNonWhitespace))
+                : acc;
         }
-        /**
-         * Aggregates two expressions by interpolating them with a whitespace literal.
-         */
-        function aggregateJsxTextParts(left, right) {
-            return ts.createAdd(ts.createAdd(left, ts.createLiteral(" ")), right);
+        function addLineOfJsxText(acc, trimmedLine) {
+            // We do not escape the string here as that is handled by the printer
+            // when it emits the literal. We do, however, need to decode JSX entities.
+            var decoded = decodeEntities(trimmedLine);
+            return acc === undefined ? decoded : acc + " " + decoded;
         }
         /**
          * Replace entities like "&nbsp;", "&#123;", and "&#xDEADBEEF;" with the characters they encode.
@@ -48227,7 +58276,7 @@ var ts;
                     return String.fromCharCode(parseInt(hex, 16));
                 }
                 else {
-                    var ch = entities[word];
+                    var ch = entities.get(word);
                     // If this is not a valid entity, then just use `match` (replace it with itself, i.e. don't replace)
                     return ch ? String.fromCharCode(ch) : match;
                 }
@@ -48239,16 +58288,16 @@ var ts;
             return decoded === text ? undefined : decoded;
         }
         function getTagName(node) {
-            if (node.kind === 241 /* JsxElement */) {
+            if (node.kind === 249 /* JsxElement */) {
                 return getTagName(node.openingElement);
             }
             else {
-                var name_34 = node.tagName;
-                if (ts.isIdentifier(name_34) && ts.isIntrinsicJsxName(name_34.text)) {
-                    return ts.createLiteral(name_34.text);
+                var name_50 = node.tagName;
+                if (ts.isIdentifier(name_50) && ts.isIntrinsicJsxName(name_50.text)) {
+                    return ts.createLiteral(name_50.text);
                 }
                 else {
-                    return ts.createExpressionFromEntityName(name_34);
+                    return ts.createExpressionFromEntityName(name_50);
                 }
             }
         }
@@ -48271,353 +58320,344 @@ var ts;
         }
     }
     ts.transformJsx = transformJsx;
-    function createEntitiesMap() {
-        return ts.createMap({
-            "quot": 0x0022,
-            "amp": 0x0026,
-            "apos": 0x0027,
-            "lt": 0x003C,
-            "gt": 0x003E,
-            "nbsp": 0x00A0,
-            "iexcl": 0x00A1,
-            "cent": 0x00A2,
-            "pound": 0x00A3,
-            "curren": 0x00A4,
-            "yen": 0x00A5,
-            "brvbar": 0x00A6,
-            "sect": 0x00A7,
-            "uml": 0x00A8,
-            "copy": 0x00A9,
-            "ordf": 0x00AA,
-            "laquo": 0x00AB,
-            "not": 0x00AC,
-            "shy": 0x00AD,
-            "reg": 0x00AE,
-            "macr": 0x00AF,
-            "deg": 0x00B0,
-            "plusmn": 0x00B1,
-            "sup2": 0x00B2,
-            "sup3": 0x00B3,
-            "acute": 0x00B4,
-            "micro": 0x00B5,
-            "para": 0x00B6,
-            "middot": 0x00B7,
-            "cedil": 0x00B8,
-            "sup1": 0x00B9,
-            "ordm": 0x00BA,
-            "raquo": 0x00BB,
-            "frac14": 0x00BC,
-            "frac12": 0x00BD,
-            "frac34": 0x00BE,
-            "iquest": 0x00BF,
-            "Agrave": 0x00C0,
-            "Aacute": 0x00C1,
-            "Acirc": 0x00C2,
-            "Atilde": 0x00C3,
-            "Auml": 0x00C4,
-            "Aring": 0x00C5,
-            "AElig": 0x00C6,
-            "Ccedil": 0x00C7,
-            "Egrave": 0x00C8,
-            "Eacute": 0x00C9,
-            "Ecirc": 0x00CA,
-            "Euml": 0x00CB,
-            "Igrave": 0x00CC,
-            "Iacute": 0x00CD,
-            "Icirc": 0x00CE,
-            "Iuml": 0x00CF,
-            "ETH": 0x00D0,
-            "Ntilde": 0x00D1,
-            "Ograve": 0x00D2,
-            "Oacute": 0x00D3,
-            "Ocirc": 0x00D4,
-            "Otilde": 0x00D5,
-            "Ouml": 0x00D6,
-            "times": 0x00D7,
-            "Oslash": 0x00D8,
-            "Ugrave": 0x00D9,
-            "Uacute": 0x00DA,
-            "Ucirc": 0x00DB,
-            "Uuml": 0x00DC,
-            "Yacute": 0x00DD,
-            "THORN": 0x00DE,
-            "szlig": 0x00DF,
-            "agrave": 0x00E0,
-            "aacute": 0x00E1,
-            "acirc": 0x00E2,
-            "atilde": 0x00E3,
-            "auml": 0x00E4,
-            "aring": 0x00E5,
-            "aelig": 0x00E6,
-            "ccedil": 0x00E7,
-            "egrave": 0x00E8,
-            "eacute": 0x00E9,
-            "ecirc": 0x00EA,
-            "euml": 0x00EB,
-            "igrave": 0x00EC,
-            "iacute": 0x00ED,
-            "icirc": 0x00EE,
-            "iuml": 0x00EF,
-            "eth": 0x00F0,
-            "ntilde": 0x00F1,
-            "ograve": 0x00F2,
-            "oacute": 0x00F3,
-            "ocirc": 0x00F4,
-            "otilde": 0x00F5,
-            "ouml": 0x00F6,
-            "divide": 0x00F7,
-            "oslash": 0x00F8,
-            "ugrave": 0x00F9,
-            "uacute": 0x00FA,
-            "ucirc": 0x00FB,
-            "uuml": 0x00FC,
-            "yacute": 0x00FD,
-            "thorn": 0x00FE,
-            "yuml": 0x00FF,
-            "OElig": 0x0152,
-            "oelig": 0x0153,
-            "Scaron": 0x0160,
-            "scaron": 0x0161,
-            "Yuml": 0x0178,
-            "fnof": 0x0192,
-            "circ": 0x02C6,
-            "tilde": 0x02DC,
-            "Alpha": 0x0391,
-            "Beta": 0x0392,
-            "Gamma": 0x0393,
-            "Delta": 0x0394,
-            "Epsilon": 0x0395,
-            "Zeta": 0x0396,
-            "Eta": 0x0397,
-            "Theta": 0x0398,
-            "Iota": 0x0399,
-            "Kappa": 0x039A,
-            "Lambda": 0x039B,
-            "Mu": 0x039C,
-            "Nu": 0x039D,
-            "Xi": 0x039E,
-            "Omicron": 0x039F,
-            "Pi": 0x03A0,
-            "Rho": 0x03A1,
-            "Sigma": 0x03A3,
-            "Tau": 0x03A4,
-            "Upsilon": 0x03A5,
-            "Phi": 0x03A6,
-            "Chi": 0x03A7,
-            "Psi": 0x03A8,
-            "Omega": 0x03A9,
-            "alpha": 0x03B1,
-            "beta": 0x03B2,
-            "gamma": 0x03B3,
-            "delta": 0x03B4,
-            "epsilon": 0x03B5,
-            "zeta": 0x03B6,
-            "eta": 0x03B7,
-            "theta": 0x03B8,
-            "iota": 0x03B9,
-            "kappa": 0x03BA,
-            "lambda": 0x03BB,
-            "mu": 0x03BC,
-            "nu": 0x03BD,
-            "xi": 0x03BE,
-            "omicron": 0x03BF,
-            "pi": 0x03C0,
-            "rho": 0x03C1,
-            "sigmaf": 0x03C2,
-            "sigma": 0x03C3,
-            "tau": 0x03C4,
-            "upsilon": 0x03C5,
-            "phi": 0x03C6,
-            "chi": 0x03C7,
-            "psi": 0x03C8,
-            "omega": 0x03C9,
-            "thetasym": 0x03D1,
-            "upsih": 0x03D2,
-            "piv": 0x03D6,
-            "ensp": 0x2002,
-            "emsp": 0x2003,
-            "thinsp": 0x2009,
-            "zwnj": 0x200C,
-            "zwj": 0x200D,
-            "lrm": 0x200E,
-            "rlm": 0x200F,
-            "ndash": 0x2013,
-            "mdash": 0x2014,
-            "lsquo": 0x2018,
-            "rsquo": 0x2019,
-            "sbquo": 0x201A,
-            "ldquo": 0x201C,
-            "rdquo": 0x201D,
-            "bdquo": 0x201E,
-            "dagger": 0x2020,
-            "Dagger": 0x2021,
-            "bull": 0x2022,
-            "hellip": 0x2026,
-            "permil": 0x2030,
-            "prime": 0x2032,
-            "Prime": 0x2033,
-            "lsaquo": 0x2039,
-            "rsaquo": 0x203A,
-            "oline": 0x203E,
-            "frasl": 0x2044,
-            "euro": 0x20AC,
-            "image": 0x2111,
-            "weierp": 0x2118,
-            "real": 0x211C,
-            "trade": 0x2122,
-            "alefsym": 0x2135,
-            "larr": 0x2190,
-            "uarr": 0x2191,
-            "rarr": 0x2192,
-            "darr": 0x2193,
-            "harr": 0x2194,
-            "crarr": 0x21B5,
-            "lArr": 0x21D0,
-            "uArr": 0x21D1,
-            "rArr": 0x21D2,
-            "dArr": 0x21D3,
-            "hArr": 0x21D4,
-            "forall": 0x2200,
-            "part": 0x2202,
-            "exist": 0x2203,
-            "empty": 0x2205,
-            "nabla": 0x2207,
-            "isin": 0x2208,
-            "notin": 0x2209,
-            "ni": 0x220B,
-            "prod": 0x220F,
-            "sum": 0x2211,
-            "minus": 0x2212,
-            "lowast": 0x2217,
-            "radic": 0x221A,
-            "prop": 0x221D,
-            "infin": 0x221E,
-            "ang": 0x2220,
-            "and": 0x2227,
-            "or": 0x2228,
-            "cap": 0x2229,
-            "cup": 0x222A,
-            "int": 0x222B,
-            "there4": 0x2234,
-            "sim": 0x223C,
-            "cong": 0x2245,
-            "asymp": 0x2248,
-            "ne": 0x2260,
-            "equiv": 0x2261,
-            "le": 0x2264,
-            "ge": 0x2265,
-            "sub": 0x2282,
-            "sup": 0x2283,
-            "nsub": 0x2284,
-            "sube": 0x2286,
-            "supe": 0x2287,
-            "oplus": 0x2295,
-            "otimes": 0x2297,
-            "perp": 0x22A5,
-            "sdot": 0x22C5,
-            "lceil": 0x2308,
-            "rceil": 0x2309,
-            "lfloor": 0x230A,
-            "rfloor": 0x230B,
-            "lang": 0x2329,
-            "rang": 0x232A,
-            "loz": 0x25CA,
-            "spades": 0x2660,
-            "clubs": 0x2663,
-            "hearts": 0x2665,
-            "diams": 0x2666
-        });
-    }
+    var entities = ts.createMapFromTemplate({
+        "quot": 0x0022,
+        "amp": 0x0026,
+        "apos": 0x0027,
+        "lt": 0x003C,
+        "gt": 0x003E,
+        "nbsp": 0x00A0,
+        "iexcl": 0x00A1,
+        "cent": 0x00A2,
+        "pound": 0x00A3,
+        "curren": 0x00A4,
+        "yen": 0x00A5,
+        "brvbar": 0x00A6,
+        "sect": 0x00A7,
+        "uml": 0x00A8,
+        "copy": 0x00A9,
+        "ordf": 0x00AA,
+        "laquo": 0x00AB,
+        "not": 0x00AC,
+        "shy": 0x00AD,
+        "reg": 0x00AE,
+        "macr": 0x00AF,
+        "deg": 0x00B0,
+        "plusmn": 0x00B1,
+        "sup2": 0x00B2,
+        "sup3": 0x00B3,
+        "acute": 0x00B4,
+        "micro": 0x00B5,
+        "para": 0x00B6,
+        "middot": 0x00B7,
+        "cedil": 0x00B8,
+        "sup1": 0x00B9,
+        "ordm": 0x00BA,
+        "raquo": 0x00BB,
+        "frac14": 0x00BC,
+        "frac12": 0x00BD,
+        "frac34": 0x00BE,
+        "iquest": 0x00BF,
+        "Agrave": 0x00C0,
+        "Aacute": 0x00C1,
+        "Acirc": 0x00C2,
+        "Atilde": 0x00C3,
+        "Auml": 0x00C4,
+        "Aring": 0x00C5,
+        "AElig": 0x00C6,
+        "Ccedil": 0x00C7,
+        "Egrave": 0x00C8,
+        "Eacute": 0x00C9,
+        "Ecirc": 0x00CA,
+        "Euml": 0x00CB,
+        "Igrave": 0x00CC,
+        "Iacute": 0x00CD,
+        "Icirc": 0x00CE,
+        "Iuml": 0x00CF,
+        "ETH": 0x00D0,
+        "Ntilde": 0x00D1,
+        "Ograve": 0x00D2,
+        "Oacute": 0x00D3,
+        "Ocirc": 0x00D4,
+        "Otilde": 0x00D5,
+        "Ouml": 0x00D6,
+        "times": 0x00D7,
+        "Oslash": 0x00D8,
+        "Ugrave": 0x00D9,
+        "Uacute": 0x00DA,
+        "Ucirc": 0x00DB,
+        "Uuml": 0x00DC,
+        "Yacute": 0x00DD,
+        "THORN": 0x00DE,
+        "szlig": 0x00DF,
+        "agrave": 0x00E0,
+        "aacute": 0x00E1,
+        "acirc": 0x00E2,
+        "atilde": 0x00E3,
+        "auml": 0x00E4,
+        "aring": 0x00E5,
+        "aelig": 0x00E6,
+        "ccedil": 0x00E7,
+        "egrave": 0x00E8,
+        "eacute": 0x00E9,
+        "ecirc": 0x00EA,
+        "euml": 0x00EB,
+        "igrave": 0x00EC,
+        "iacute": 0x00ED,
+        "icirc": 0x00EE,
+        "iuml": 0x00EF,
+        "eth": 0x00F0,
+        "ntilde": 0x00F1,
+        "ograve": 0x00F2,
+        "oacute": 0x00F3,
+        "ocirc": 0x00F4,
+        "otilde": 0x00F5,
+        "ouml": 0x00F6,
+        "divide": 0x00F7,
+        "oslash": 0x00F8,
+        "ugrave": 0x00F9,
+        "uacute": 0x00FA,
+        "ucirc": 0x00FB,
+        "uuml": 0x00FC,
+        "yacute": 0x00FD,
+        "thorn": 0x00FE,
+        "yuml": 0x00FF,
+        "OElig": 0x0152,
+        "oelig": 0x0153,
+        "Scaron": 0x0160,
+        "scaron": 0x0161,
+        "Yuml": 0x0178,
+        "fnof": 0x0192,
+        "circ": 0x02C6,
+        "tilde": 0x02DC,
+        "Alpha": 0x0391,
+        "Beta": 0x0392,
+        "Gamma": 0x0393,
+        "Delta": 0x0394,
+        "Epsilon": 0x0395,
+        "Zeta": 0x0396,
+        "Eta": 0x0397,
+        "Theta": 0x0398,
+        "Iota": 0x0399,
+        "Kappa": 0x039A,
+        "Lambda": 0x039B,
+        "Mu": 0x039C,
+        "Nu": 0x039D,
+        "Xi": 0x039E,
+        "Omicron": 0x039F,
+        "Pi": 0x03A0,
+        "Rho": 0x03A1,
+        "Sigma": 0x03A3,
+        "Tau": 0x03A4,
+        "Upsilon": 0x03A5,
+        "Phi": 0x03A6,
+        "Chi": 0x03A7,
+        "Psi": 0x03A8,
+        "Omega": 0x03A9,
+        "alpha": 0x03B1,
+        "beta": 0x03B2,
+        "gamma": 0x03B3,
+        "delta": 0x03B4,
+        "epsilon": 0x03B5,
+        "zeta": 0x03B6,
+        "eta": 0x03B7,
+        "theta": 0x03B8,
+        "iota": 0x03B9,
+        "kappa": 0x03BA,
+        "lambda": 0x03BB,
+        "mu": 0x03BC,
+        "nu": 0x03BD,
+        "xi": 0x03BE,
+        "omicron": 0x03BF,
+        "pi": 0x03C0,
+        "rho": 0x03C1,
+        "sigmaf": 0x03C2,
+        "sigma": 0x03C3,
+        "tau": 0x03C4,
+        "upsilon": 0x03C5,
+        "phi": 0x03C6,
+        "chi": 0x03C7,
+        "psi": 0x03C8,
+        "omega": 0x03C9,
+        "thetasym": 0x03D1,
+        "upsih": 0x03D2,
+        "piv": 0x03D6,
+        "ensp": 0x2002,
+        "emsp": 0x2003,
+        "thinsp": 0x2009,
+        "zwnj": 0x200C,
+        "zwj": 0x200D,
+        "lrm": 0x200E,
+        "rlm": 0x200F,
+        "ndash": 0x2013,
+        "mdash": 0x2014,
+        "lsquo": 0x2018,
+        "rsquo": 0x2019,
+        "sbquo": 0x201A,
+        "ldquo": 0x201C,
+        "rdquo": 0x201D,
+        "bdquo": 0x201E,
+        "dagger": 0x2020,
+        "Dagger": 0x2021,
+        "bull": 0x2022,
+        "hellip": 0x2026,
+        "permil": 0x2030,
+        "prime": 0x2032,
+        "Prime": 0x2033,
+        "lsaquo": 0x2039,
+        "rsaquo": 0x203A,
+        "oline": 0x203E,
+        "frasl": 0x2044,
+        "euro": 0x20AC,
+        "image": 0x2111,
+        "weierp": 0x2118,
+        "real": 0x211C,
+        "trade": 0x2122,
+        "alefsym": 0x2135,
+        "larr": 0x2190,
+        "uarr": 0x2191,
+        "rarr": 0x2192,
+        "darr": 0x2193,
+        "harr": 0x2194,
+        "crarr": 0x21B5,
+        "lArr": 0x21D0,
+        "uArr": 0x21D1,
+        "rArr": 0x21D2,
+        "dArr": 0x21D3,
+        "hArr": 0x21D4,
+        "forall": 0x2200,
+        "part": 0x2202,
+        "exist": 0x2203,
+        "empty": 0x2205,
+        "nabla": 0x2207,
+        "isin": 0x2208,
+        "notin": 0x2209,
+        "ni": 0x220B,
+        "prod": 0x220F,
+        "sum": 0x2211,
+        "minus": 0x2212,
+        "lowast": 0x2217,
+        "radic": 0x221A,
+        "prop": 0x221D,
+        "infin": 0x221E,
+        "ang": 0x2220,
+        "and": 0x2227,
+        "or": 0x2228,
+        "cap": 0x2229,
+        "cup": 0x222A,
+        "int": 0x222B,
+        "there4": 0x2234,
+        "sim": 0x223C,
+        "cong": 0x2245,
+        "asymp": 0x2248,
+        "ne": 0x2260,
+        "equiv": 0x2261,
+        "le": 0x2264,
+        "ge": 0x2265,
+        "sub": 0x2282,
+        "sup": 0x2283,
+        "nsub": 0x2284,
+        "sube": 0x2286,
+        "supe": 0x2287,
+        "oplus": 0x2295,
+        "otimes": 0x2297,
+        "perp": 0x22A5,
+        "sdot": 0x22C5,
+        "lceil": 0x2308,
+        "rceil": 0x2309,
+        "lfloor": 0x230A,
+        "rfloor": 0x230B,
+        "lang": 0x2329,
+        "rang": 0x232A,
+        "loz": 0x25CA,
+        "spades": 0x2660,
+        "clubs": 0x2663,
+        "hearts": 0x2665,
+        "diams": 0x2666
+    });
 })(ts || (ts = {}));
 /// <reference path="../factory.ts" />
 /// <reference path="../visitor.ts" />
 /*@internal*/
 var ts;
 (function (ts) {
-    function transformES7(context) {
+    function transformES2016(context) {
         var hoistVariableDeclaration = context.hoistVariableDeclaration;
         return transformSourceFile;
         function transformSourceFile(node) {
-            if (ts.isDeclarationFile(node)) {
+            if (node.isDeclarationFile) {
                 return node;
             }
             return ts.visitEachChild(node, visitor, context);
         }
         function visitor(node) {
-            if (node.transformFlags & 16 /* ES7 */) {
-                return visitorWorker(node);
-            }
-            else if (node.transformFlags & 32 /* ContainsES7 */) {
-                return ts.visitEachChild(node, visitor, context);
-            }
-            else {
+            if ((node.transformFlags & 32 /* ContainsES2016 */) === 0) {
                 return node;
             }
-        }
-        function visitorWorker(node) {
             switch (node.kind) {
-                case 187 /* BinaryExpression */:
+                case 194 /* BinaryExpression */:
                     return visitBinaryExpression(node);
                 default:
-                    ts.Debug.failBadSyntaxKind(node);
                     return ts.visitEachChild(node, visitor, context);
             }
         }
         function visitBinaryExpression(node) {
-            // We are here because ES7 adds support for the exponentiation operator.
+            switch (node.operatorToken.kind) {
+                case 62 /* AsteriskAsteriskEqualsToken */:
+                    return visitExponentiationAssignmentExpression(node);
+                case 40 /* AsteriskAsteriskToken */:
+                    return visitExponentiationExpression(node);
+                default:
+                    return ts.visitEachChild(node, visitor, context);
+            }
+        }
+        function visitExponentiationAssignmentExpression(node) {
+            var target;
+            var value;
             var left = ts.visitNode(node.left, visitor, ts.isExpression);
             var right = ts.visitNode(node.right, visitor, ts.isExpression);
-            if (node.operatorToken.kind === 60 /* AsteriskAsteriskEqualsToken */) {
-                var target = void 0;
-                var value = void 0;
-                if (ts.isElementAccessExpression(left)) {
-                    // Transforms `a[x] **= b` into `(_a = a)[_x = x] = Math.pow(_a[_x], b)`
-                    var expressionTemp = ts.createTempVariable(hoistVariableDeclaration);
-                    var argumentExpressionTemp = ts.createTempVariable(hoistVariableDeclaration);
-                    target = ts.createElementAccess(ts.createAssignment(expressionTemp, left.expression, /*location*/ left.expression), ts.createAssignment(argumentExpressionTemp, left.argumentExpression, /*location*/ left.argumentExpression), 
-                    /*location*/ left);
-                    value = ts.createElementAccess(expressionTemp, argumentExpressionTemp, 
-                    /*location*/ left);
-                }
-                else if (ts.isPropertyAccessExpression(left)) {
-                    // Transforms `a.x **= b` into `(_a = a).x = Math.pow(_a.x, b)`
-                    var expressionTemp = ts.createTempVariable(hoistVariableDeclaration);
-                    target = ts.createPropertyAccess(ts.createAssignment(expressionTemp, left.expression, /*location*/ left.expression), left.name, 
-                    /*location*/ left);
-                    value = ts.createPropertyAccess(expressionTemp, left.name, 
-                    /*location*/ left);
-                }
-                else {
-                    // Transforms `a **= b` into `a = Math.pow(a, b)`
-                    target = left;
-                    value = left;
-                }
-                return ts.createAssignment(target, ts.createMathPow(value, right, /*location*/ node), /*location*/ node);
-            }
-            else if (node.operatorToken.kind === 38 /* AsteriskAsteriskToken */) {
-                // Transforms `a ** b` into `Math.pow(a, b)`
-                return ts.createMathPow(left, right, /*location*/ node);
+            if (ts.isElementAccessExpression(left)) {
+                // Transforms `a[x] **= b` into `(_a = a)[_x = x] = Math.pow(_a[_x], b)`
+                var expressionTemp = ts.createTempVariable(hoistVariableDeclaration);
+                var argumentExpressionTemp = ts.createTempVariable(hoistVariableDeclaration);
+                target = ts.setTextRange(ts.createElementAccess(ts.setTextRange(ts.createAssignment(expressionTemp, left.expression), left.expression), ts.setTextRange(ts.createAssignment(argumentExpressionTemp, left.argumentExpression), left.argumentExpression)), left);
+                value = ts.setTextRange(ts.createElementAccess(expressionTemp, argumentExpressionTemp), left);
+            }
+            else if (ts.isPropertyAccessExpression(left)) {
+                // Transforms `a.x **= b` into `(_a = a).x = Math.pow(_a.x, b)`
+                var expressionTemp = ts.createTempVariable(hoistVariableDeclaration);
+                target = ts.setTextRange(ts.createPropertyAccess(ts.setTextRange(ts.createAssignment(expressionTemp, left.expression), left.expression), left.name), left);
+                value = ts.setTextRange(ts.createPropertyAccess(expressionTemp, left.name), left);
             }
             else {
-                ts.Debug.failBadSyntaxKind(node);
-                return ts.visitEachChild(node, visitor, context);
+                // Transforms `a **= b` into `a = Math.pow(a, b)`
+                target = left;
+                value = left;
             }
+            return ts.setTextRange(ts.createAssignment(target, ts.createMathPow(value, right, /*location*/ node)), node);
+        }
+        function visitExponentiationExpression(node) {
+            // Transforms `a ** b` into `Math.pow(a, b)`
+            var left = ts.visitNode(node.left, visitor, ts.isExpression);
+            var right = ts.visitNode(node.right, visitor, ts.isExpression);
+            return ts.createMathPow(left, right, /*location*/ node);
         }
     }
-    ts.transformES7 = transformES7;
+    ts.transformES2016 = transformES2016;
 })(ts || (ts = {}));
 /// <reference path="../factory.ts" />
 /// <reference path="../visitor.ts" />
+/// <reference path="./destructuring.ts" />
 /*@internal*/
 var ts;
 (function (ts) {
-    var ES6SubstitutionFlags;
-    (function (ES6SubstitutionFlags) {
+    var ES2015SubstitutionFlags;
+    (function (ES2015SubstitutionFlags) {
         /** Enables substitutions for captured `this` */
-        ES6SubstitutionFlags[ES6SubstitutionFlags["CapturedThis"] = 1] = "CapturedThis";
+        ES2015SubstitutionFlags[ES2015SubstitutionFlags["CapturedThis"] = 1] = "CapturedThis";
         /** Enables substitutions for block-scoped bindings. */
-        ES6SubstitutionFlags[ES6SubstitutionFlags["BlockScopedBindings"] = 2] = "BlockScopedBindings";
-    })(ES6SubstitutionFlags || (ES6SubstitutionFlags = {}));
+        ES2015SubstitutionFlags[ES2015SubstitutionFlags["BlockScopedBindings"] = 2] = "BlockScopedBindings";
+    })(ES2015SubstitutionFlags || (ES2015SubstitutionFlags = {}));
     var CopyDirection;
     (function (CopyDirection) {
         CopyDirection[CopyDirection["ToOriginal"] = 0] = "ToOriginal";
@@ -48653,8 +58693,85 @@ var ts;
          */
         SuperCaptureResult[SuperCaptureResult["ReplaceWithReturn"] = 2] = "ReplaceWithReturn";
     })(SuperCaptureResult || (SuperCaptureResult = {}));
-    function transformES6(context) {
-        var startLexicalEnvironment = context.startLexicalEnvironment, endLexicalEnvironment = context.endLexicalEnvironment, hoistVariableDeclaration = context.hoistVariableDeclaration;
+    // Facts we track as we traverse the tree
+    var HierarchyFacts;
+    (function (HierarchyFacts) {
+        HierarchyFacts[HierarchyFacts["None"] = 0] = "None";
+        //
+        // Ancestor facts
+        //
+        HierarchyFacts[HierarchyFacts["Function"] = 1] = "Function";
+        HierarchyFacts[HierarchyFacts["ArrowFunction"] = 2] = "ArrowFunction";
+        HierarchyFacts[HierarchyFacts["AsyncFunctionBody"] = 4] = "AsyncFunctionBody";
+        HierarchyFacts[HierarchyFacts["NonStaticClassElement"] = 8] = "NonStaticClassElement";
+        HierarchyFacts[HierarchyFacts["CapturesThis"] = 16] = "CapturesThis";
+        HierarchyFacts[HierarchyFacts["ExportedVariableStatement"] = 32] = "ExportedVariableStatement";
+        HierarchyFacts[HierarchyFacts["TopLevel"] = 64] = "TopLevel";
+        HierarchyFacts[HierarchyFacts["Block"] = 128] = "Block";
+        HierarchyFacts[HierarchyFacts["IterationStatement"] = 256] = "IterationStatement";
+        HierarchyFacts[HierarchyFacts["IterationStatementBlock"] = 512] = "IterationStatementBlock";
+        HierarchyFacts[HierarchyFacts["ForStatement"] = 1024] = "ForStatement";
+        HierarchyFacts[HierarchyFacts["ForInOrForOfStatement"] = 2048] = "ForInOrForOfStatement";
+        HierarchyFacts[HierarchyFacts["ConstructorWithCapturedSuper"] = 4096] = "ConstructorWithCapturedSuper";
+        HierarchyFacts[HierarchyFacts["ComputedPropertyName"] = 8192] = "ComputedPropertyName";
+        // NOTE: do not add more ancestor flags without also updating AncestorFactsMask below.
+        //
+        // Ancestor masks
+        //
+        HierarchyFacts[HierarchyFacts["AncestorFactsMask"] = 16383] = "AncestorFactsMask";
+        // We are always in *some* kind of block scope, but only specific block-scope containers are
+        // top-level or Blocks.
+        HierarchyFacts[HierarchyFacts["BlockScopeIncludes"] = 0] = "BlockScopeIncludes";
+        HierarchyFacts[HierarchyFacts["BlockScopeExcludes"] = 4032] = "BlockScopeExcludes";
+        // A source file is a top-level block scope.
+        HierarchyFacts[HierarchyFacts["SourceFileIncludes"] = 64] = "SourceFileIncludes";
+        HierarchyFacts[HierarchyFacts["SourceFileExcludes"] = 3968] = "SourceFileExcludes";
+        // Functions, methods, and accessors are both new lexical scopes and new block scopes.
+        HierarchyFacts[HierarchyFacts["FunctionIncludes"] = 65] = "FunctionIncludes";
+        HierarchyFacts[HierarchyFacts["FunctionExcludes"] = 16286] = "FunctionExcludes";
+        HierarchyFacts[HierarchyFacts["AsyncFunctionBodyIncludes"] = 69] = "AsyncFunctionBodyIncludes";
+        HierarchyFacts[HierarchyFacts["AsyncFunctionBodyExcludes"] = 16278] = "AsyncFunctionBodyExcludes";
+        // Arrow functions are lexically scoped to their container, but are new block scopes.
+        HierarchyFacts[HierarchyFacts["ArrowFunctionIncludes"] = 66] = "ArrowFunctionIncludes";
+        HierarchyFacts[HierarchyFacts["ArrowFunctionExcludes"] = 16256] = "ArrowFunctionExcludes";
+        // Constructors are both new lexical scopes and new block scopes. Constructors are also
+        // always considered non-static members of a class.
+        HierarchyFacts[HierarchyFacts["ConstructorIncludes"] = 73] = "ConstructorIncludes";
+        HierarchyFacts[HierarchyFacts["ConstructorExcludes"] = 16278] = "ConstructorExcludes";
+        // 'do' and 'while' statements are not block scopes. We track that the subtree is contained
+        // within an IterationStatement to indicate whether the embedded statement is an
+        // IterationStatementBlock.
+        HierarchyFacts[HierarchyFacts["DoOrWhileStatementIncludes"] = 256] = "DoOrWhileStatementIncludes";
+        HierarchyFacts[HierarchyFacts["DoOrWhileStatementExcludes"] = 0] = "DoOrWhileStatementExcludes";
+        // 'for' statements are new block scopes and have special handling for 'let' declarations.
+        HierarchyFacts[HierarchyFacts["ForStatementIncludes"] = 1280] = "ForStatementIncludes";
+        HierarchyFacts[HierarchyFacts["ForStatementExcludes"] = 3008] = "ForStatementExcludes";
+        // 'for-in' and 'for-of' statements are new block scopes and have special handling for
+        // 'let' declarations.
+        HierarchyFacts[HierarchyFacts["ForInOrForOfStatementIncludes"] = 2304] = "ForInOrForOfStatementIncludes";
+        HierarchyFacts[HierarchyFacts["ForInOrForOfStatementExcludes"] = 1984] = "ForInOrForOfStatementExcludes";
+        // Blocks (other than function bodies) are new block scopes.
+        HierarchyFacts[HierarchyFacts["BlockIncludes"] = 128] = "BlockIncludes";
+        HierarchyFacts[HierarchyFacts["BlockExcludes"] = 3904] = "BlockExcludes";
+        HierarchyFacts[HierarchyFacts["IterationStatementBlockIncludes"] = 512] = "IterationStatementBlockIncludes";
+        HierarchyFacts[HierarchyFacts["IterationStatementBlockExcludes"] = 4032] = "IterationStatementBlockExcludes";
+        // Computed property names track subtree flags differently than their containing members.
+        HierarchyFacts[HierarchyFacts["ComputedPropertyNameIncludes"] = 8192] = "ComputedPropertyNameIncludes";
+        HierarchyFacts[HierarchyFacts["ComputedPropertyNameExcludes"] = 0] = "ComputedPropertyNameExcludes";
+        //
+        // Subtree facts
+        //
+        HierarchyFacts[HierarchyFacts["NewTarget"] = 16384] = "NewTarget";
+        HierarchyFacts[HierarchyFacts["NewTargetInComputedPropertyName"] = 32768] = "NewTargetInComputedPropertyName";
+        //
+        // Subtree masks
+        //
+        HierarchyFacts[HierarchyFacts["SubtreeFactsMask"] = -16384] = "SubtreeFactsMask";
+        HierarchyFacts[HierarchyFacts["PropagateNewTargetMask"] = 49152] = "PropagateNewTargetMask";
+    })(HierarchyFacts || (HierarchyFacts = {}));
+    function transformES2015(context) {
+        var startLexicalEnvironment = context.startLexicalEnvironment, resumeLexicalEnvironment = context.resumeLexicalEnvironment, endLexicalEnvironment = context.endLexicalEnvironment, hoistVariableDeclaration = context.hoistVariableDeclaration;
+        var compilerOptions = context.getCompilerOptions();
         var resolver = context.getEmitResolver();
         var previousOnSubstituteNode = context.onSubstituteNode;
         var previousOnEmitNode = context.onEmitNode;
@@ -48662,14 +58779,7 @@ var ts;
         context.onSubstituteNode = onSubstituteNode;
         var currentSourceFile;
         var currentText;
-        var currentParent;
-        var currentNode;
-        var enclosingVariableStatement;
-        var enclosingBlockScopeContainer;
-        var enclosingBlockScopeContainerParent;
-        var enclosingFunction;
-        var enclosingNonArrowFunction;
-        var enclosingNonAsyncFunctionBody;
+        var hierarchyFacts;
         /**
          * Used to track if we are emitting body of the converted loop
          */
@@ -48682,231 +58792,273 @@ var ts;
         var enabledSubstitutions;
         return transformSourceFile;
         function transformSourceFile(node) {
-            if (ts.isDeclarationFile(node)) {
+            if (node.isDeclarationFile) {
                 return node;
             }
             currentSourceFile = node;
             currentText = node.text;
-            return ts.visitNode(node, visitor, ts.isSourceFile);
+            var visited = visitSourceFile(node);
+            ts.addEmitHelpers(visited, context.readEmitHelpers());
+            currentSourceFile = undefined;
+            currentText = undefined;
+            hierarchyFacts = 0 /* None */;
+            return visited;
         }
-        function visitor(node) {
-            return saveStateAndInvoke(node, dispatcher);
+        /**
+         * Sets the `HierarchyFacts` for this node prior to visiting this node's subtree, returning the facts set prior to modification.
+         * @param excludeFacts The existing `HierarchyFacts` to reset before visiting the subtree.
+         * @param includeFacts The new `HierarchyFacts` to set before visiting the subtree.
+         */
+        function enterSubtree(excludeFacts, includeFacts) {
+            var ancestorFacts = hierarchyFacts;
+            hierarchyFacts = (hierarchyFacts & ~excludeFacts | includeFacts) & 16383 /* AncestorFactsMask */;
+            return ancestorFacts;
+        }
+        /**
+         * Restores the `HierarchyFacts` for this node's ancestor after visiting this node's
+         * subtree, propagating specific facts from the subtree.
+         * @param ancestorFacts The `HierarchyFacts` of the ancestor to restore after visiting the subtree.
+         * @param excludeFacts The existing `HierarchyFacts` of the subtree that should not be propagated.
+         * @param includeFacts The new `HierarchyFacts` of the subtree that should be propagated.
+         */
+        function exitSubtree(ancestorFacts, excludeFacts, includeFacts) {
+            hierarchyFacts = (hierarchyFacts & ~excludeFacts | includeFacts) & -16384 /* SubtreeFactsMask */ | ancestorFacts;
         }
-        function dispatcher(node) {
-            return convertedLoopState
-                ? visitorForConvertedLoopWorker(node)
-                : visitorWorker(node);
+        function isReturnVoidStatementInConstructorWithCapturedSuper(node) {
+            return hierarchyFacts & 4096 /* ConstructorWithCapturedSuper */
+                && node.kind === 219 /* ReturnStatement */
+                && !node.expression;
         }
-        function saveStateAndInvoke(node, f) {
-            var savedEnclosingFunction = enclosingFunction;
-            var savedEnclosingNonArrowFunction = enclosingNonArrowFunction;
-            var savedEnclosingNonAsyncFunctionBody = enclosingNonAsyncFunctionBody;
-            var savedEnclosingBlockScopeContainer = enclosingBlockScopeContainer;
-            var savedEnclosingBlockScopeContainerParent = enclosingBlockScopeContainerParent;
-            var savedEnclosingVariableStatement = enclosingVariableStatement;
-            var savedCurrentParent = currentParent;
-            var savedCurrentNode = currentNode;
-            var savedConvertedLoopState = convertedLoopState;
-            if (ts.nodeStartsNewLexicalEnvironment(node)) {
-                // don't treat content of nodes that start new lexical environment as part of converted loop copy
-                convertedLoopState = undefined;
+        function isClassLikeVariableStatement(node) {
+            if (!ts.isVariableStatement(node))
+                return false;
+            var variable = ts.singleOrUndefined(node.declarationList.declarations);
+            return variable
+                && variable.initializer
+                && ts.isIdentifier(variable.name)
+                && (ts.isClassLike(variable.initializer)
+                    || (ts.isAssignmentExpression(variable.initializer)
+                        && ts.isIdentifier(variable.initializer.left)
+                        && ts.isClassLike(variable.initializer.right)));
+        }
+        function isTypeScriptClassWrapper(node) {
+            var call = ts.tryCast(node, ts.isCallExpression);
+            if (!call || ts.isParseTreeNode(call) ||
+                ts.some(call.typeArguments) ||
+                ts.some(call.arguments)) {
+                return false;
             }
-            onBeforeVisitNode(node);
-            var visited = f(node);
-            convertedLoopState = savedConvertedLoopState;
-            enclosingFunction = savedEnclosingFunction;
-            enclosingNonArrowFunction = savedEnclosingNonArrowFunction;
-            enclosingNonAsyncFunctionBody = savedEnclosingNonAsyncFunctionBody;
-            enclosingBlockScopeContainer = savedEnclosingBlockScopeContainer;
-            enclosingBlockScopeContainerParent = savedEnclosingBlockScopeContainerParent;
-            enclosingVariableStatement = savedEnclosingVariableStatement;
-            currentParent = savedCurrentParent;
-            currentNode = savedCurrentNode;
-            return visited;
+            var func = ts.tryCast(ts.skipOuterExpressions(call.expression), ts.isFunctionExpression);
+            if (!func || ts.isParseTreeNode(func) ||
+                ts.some(func.typeParameters) ||
+                ts.some(func.parameters) ||
+                func.type ||
+                !func.body) {
+                return false;
+            }
+            var statements = func.body.statements;
+            if (statements.length < 2) {
+                return false;
+            }
+            var firstStatement = statements[0];
+            if (ts.isParseTreeNode(firstStatement) ||
+                !ts.isClassLike(firstStatement) &&
+                    !isClassLikeVariableStatement(firstStatement)) {
+                return false;
+            }
+            var lastStatement = ts.elementAt(statements, -1);
+            var returnStatement = ts.tryCast(ts.isVariableStatement(lastStatement) ? ts.elementAt(statements, -2) : lastStatement, ts.isReturnStatement);
+            if (!returnStatement ||
+                !returnStatement.expression ||
+                !ts.isIdentifier(ts.skipOuterExpressions(returnStatement.expression))) {
+                return false;
+            }
+            return true;
         }
-        function shouldCheckNode(node) {
-            return (node.transformFlags & 64 /* ES6 */) !== 0 ||
-                node.kind === 214 /* LabeledStatement */ ||
-                (ts.isIterationStatement(node, /*lookInLabeledStatements*/ false) && shouldConvertIterationStatementBody(node));
+        function shouldVisitNode(node) {
+            return (node.transformFlags & 128 /* ContainsES2015 */) !== 0
+                || convertedLoopState !== undefined
+                || (hierarchyFacts & 4096 /* ConstructorWithCapturedSuper */ && ts.isStatement(node))
+                || (ts.isIterationStatement(node, /*lookInLabeledStatements*/ false) && shouldConvertIterationStatementBody(node))
+                || isTypeScriptClassWrapper(node);
         }
-        function visitorWorker(node) {
-            if (shouldCheckNode(node)) {
+        function visitor(node) {
+            if (shouldVisitNode(node)) {
                 return visitJavaScript(node);
             }
-            else if (node.transformFlags & 128 /* ContainsES6 */) {
-                return ts.visitEachChild(node, visitor, context);
-            }
             else {
                 return node;
             }
         }
-        function visitorForConvertedLoopWorker(node) {
-            var result;
-            if (shouldCheckNode(node)) {
-                result = visitJavaScript(node);
+        function functionBodyVisitor(node) {
+            if (shouldVisitNode(node)) {
+                return visitBlock(node, /*isFunctionBody*/ true);
             }
-            else {
-                result = visitNodesInConvertedLoop(node);
-            }
-            return result;
+            return node;
         }
-        function visitNodesInConvertedLoop(node) {
-            switch (node.kind) {
-                case 211 /* ReturnStatement */:
-                    return visitReturnStatement(node);
-                case 200 /* VariableStatement */:
-                    return visitVariableStatement(node);
-                case 213 /* SwitchStatement */:
-                    return visitSwitchStatement(node);
-                case 210 /* BreakStatement */:
-                case 209 /* ContinueStatement */:
-                    return visitBreakOrContinueStatement(node);
-                case 97 /* ThisKeyword */:
-                    return visitThisKeyword(node);
-                case 69 /* Identifier */:
-                    return visitIdentifier(node);
-                default:
-                    return ts.visitEachChild(node, visitor, context);
+        function callExpressionVisitor(node) {
+            if (node.kind === 97 /* SuperKeyword */) {
+                return visitSuperKeyword(/*isExpressionOfCall*/ true);
             }
+            return visitor(node);
         }
         function visitJavaScript(node) {
             switch (node.kind) {
-                case 82 /* ExportKeyword */:
-                    return node;
-                case 221 /* ClassDeclaration */:
+                case 115 /* StaticKeyword */:
+                    return undefined; // elide static keyword
+                case 229 /* ClassDeclaration */:
                     return visitClassDeclaration(node);
-                case 192 /* ClassExpression */:
+                case 199 /* ClassExpression */:
                     return visitClassExpression(node);
-                case 142 /* Parameter */:
+                case 146 /* Parameter */:
                     return visitParameter(node);
-                case 220 /* FunctionDeclaration */:
+                case 228 /* FunctionDeclaration */:
                     return visitFunctionDeclaration(node);
-                case 180 /* ArrowFunction */:
+                case 187 /* ArrowFunction */:
                     return visitArrowFunction(node);
-                case 179 /* FunctionExpression */:
+                case 186 /* FunctionExpression */:
                     return visitFunctionExpression(node);
-                case 218 /* VariableDeclaration */:
+                case 226 /* VariableDeclaration */:
                     return visitVariableDeclaration(node);
-                case 69 /* Identifier */:
+                case 71 /* Identifier */:
                     return visitIdentifier(node);
-                case 219 /* VariableDeclarationList */:
+                case 227 /* VariableDeclarationList */:
                     return visitVariableDeclarationList(node);
-                case 214 /* LabeledStatement */:
+                case 221 /* SwitchStatement */:
+                    return visitSwitchStatement(node);
+                case 235 /* CaseBlock */:
+                    return visitCaseBlock(node);
+                case 207 /* Block */:
+                    return visitBlock(node, /*isFunctionBody*/ false);
+                case 218 /* BreakStatement */:
+                case 217 /* ContinueStatement */:
+                    return visitBreakOrContinueStatement(node);
+                case 222 /* LabeledStatement */:
                     return visitLabeledStatement(node);
-                case 204 /* DoStatement */:
-                    return visitDoStatement(node);
-                case 205 /* WhileStatement */:
-                    return visitWhileStatement(node);
-                case 206 /* ForStatement */:
-                    return visitForStatement(node);
-                case 207 /* ForInStatement */:
-                    return visitForInStatement(node);
-                case 208 /* ForOfStatement */:
-                    return visitForOfStatement(node);
-                case 202 /* ExpressionStatement */:
+                case 212 /* DoStatement */:
+                case 213 /* WhileStatement */:
+                    return visitDoOrWhileStatement(node, /*outermostLabeledStatement*/ undefined);
+                case 214 /* ForStatement */:
+                    return visitForStatement(node, /*outermostLabeledStatement*/ undefined);
+                case 215 /* ForInStatement */:
+                    return visitForInStatement(node, /*outermostLabeledStatement*/ undefined);
+                case 216 /* ForOfStatement */:
+                    return visitForOfStatement(node, /*outermostLabeledStatement*/ undefined);
+                case 210 /* ExpressionStatement */:
                     return visitExpressionStatement(node);
-                case 171 /* ObjectLiteralExpression */:
+                case 178 /* ObjectLiteralExpression */:
                     return visitObjectLiteralExpression(node);
-                case 254 /* ShorthandPropertyAssignment */:
+                case 260 /* CatchClause */:
+                    return visitCatchClause(node);
+                case 262 /* ShorthandPropertyAssignment */:
                     return visitShorthandPropertyAssignment(node);
-                case 170 /* ArrayLiteralExpression */:
+                case 144 /* ComputedPropertyName */:
+                    return visitComputedPropertyName(node);
+                case 177 /* ArrayLiteralExpression */:
                     return visitArrayLiteralExpression(node);
-                case 174 /* CallExpression */:
+                case 181 /* CallExpression */:
                     return visitCallExpression(node);
-                case 175 /* NewExpression */:
+                case 182 /* NewExpression */:
                     return visitNewExpression(node);
-                case 178 /* ParenthesizedExpression */:
+                case 185 /* ParenthesizedExpression */:
                     return visitParenthesizedExpression(node, /*needsDestructuringValue*/ true);
-                case 187 /* BinaryExpression */:
+                case 194 /* BinaryExpression */:
                     return visitBinaryExpression(node, /*needsDestructuringValue*/ true);
-                case 11 /* NoSubstitutionTemplateLiteral */:
-                case 12 /* TemplateHead */:
-                case 13 /* TemplateMiddle */:
-                case 14 /* TemplateTail */:
+                case 13 /* NoSubstitutionTemplateLiteral */:
+                case 14 /* TemplateHead */:
+                case 15 /* TemplateMiddle */:
+                case 16 /* TemplateTail */:
                     return visitTemplateLiteral(node);
-                case 176 /* TaggedTemplateExpression */:
+                case 9 /* StringLiteral */:
+                    return visitStringLiteral(node);
+                case 8 /* NumericLiteral */:
+                    return visitNumericLiteral(node);
+                case 183 /* TaggedTemplateExpression */:
                     return visitTaggedTemplateExpression(node);
-                case 189 /* TemplateExpression */:
+                case 196 /* TemplateExpression */:
                     return visitTemplateExpression(node);
-                case 190 /* YieldExpression */:
+                case 197 /* YieldExpression */:
                     return visitYieldExpression(node);
-                case 95 /* SuperKeyword */:
-                    return visitSuperKeyword(node);
-                case 190 /* YieldExpression */:
-                    // `yield` will be handled by a generators transform.
-                    return ts.visitEachChild(node, visitor, context);
-                case 147 /* MethodDeclaration */:
+                case 198 /* SpreadElement */:
+                    return visitSpreadElement(node);
+                case 97 /* SuperKeyword */:
+                    return visitSuperKeyword(/*isExpressionOfCall*/ false);
+                case 99 /* ThisKeyword */:
+                    return visitThisKeyword(node);
+                case 204 /* MetaProperty */:
+                    return visitMetaProperty(node);
+                case 151 /* MethodDeclaration */:
                     return visitMethodDeclaration(node);
-                case 256 /* SourceFile */:
-                    return visitSourceFileNode(node);
-                case 200 /* VariableStatement */:
+                case 153 /* GetAccessor */:
+                case 154 /* SetAccessor */:
+                    return visitAccessorDeclaration(node);
+                case 208 /* VariableStatement */:
                     return visitVariableStatement(node);
+                case 219 /* ReturnStatement */:
+                    return visitReturnStatement(node);
                 default:
-                    ts.Debug.failBadSyntaxKind(node);
                     return ts.visitEachChild(node, visitor, context);
             }
         }
-        function onBeforeVisitNode(node) {
-            if (currentNode) {
-                if (ts.isBlockScope(currentNode, currentParent)) {
-                    enclosingBlockScopeContainer = currentNode;
-                    enclosingBlockScopeContainerParent = currentParent;
-                }
-                if (ts.isFunctionLike(currentNode)) {
-                    enclosingFunction = currentNode;
-                    if (currentNode.kind !== 180 /* ArrowFunction */) {
-                        enclosingNonArrowFunction = currentNode;
-                        if (!(ts.getEmitFlags(currentNode) & 2097152 /* AsyncFunctionBody */)) {
-                            enclosingNonAsyncFunctionBody = currentNode;
-                        }
-                    }
-                }
-                // keep track of the enclosing variable statement when in the context of
-                // variable statements, variable declarations, binding elements, and binding
-                // patterns.
-                switch (currentNode.kind) {
-                    case 200 /* VariableStatement */:
-                        enclosingVariableStatement = currentNode;
-                        break;
-                    case 219 /* VariableDeclarationList */:
-                    case 218 /* VariableDeclaration */:
-                    case 169 /* BindingElement */:
-                    case 167 /* ObjectBindingPattern */:
-                    case 168 /* ArrayBindingPattern */:
-                        break;
-                    default:
-                        enclosingVariableStatement = undefined;
-                }
-            }
-            currentParent = currentNode;
-            currentNode = node;
+        function visitSourceFile(node) {
+            var ancestorFacts = enterSubtree(3968 /* SourceFileExcludes */, 64 /* SourceFileIncludes */);
+            var statements = [];
+            startLexicalEnvironment();
+            var statementOffset = ts.addStandardPrologue(statements, node.statements, /*ensureUseStrict*/ false);
+            addCaptureThisForNodeIfNeeded(statements, node);
+            statementOffset = ts.addCustomPrologue(statements, node.statements, statementOffset, visitor);
+            ts.addRange(statements, ts.visitNodes(node.statements, visitor, ts.isStatement, statementOffset));
+            ts.addRange(statements, endLexicalEnvironment());
+            exitSubtree(ancestorFacts, 0 /* None */, 0 /* None */);
+            return ts.updateSourceFileNode(node, ts.setTextRange(ts.createNodeArray(statements), node.statements));
         }
         function visitSwitchStatement(node) {
-            ts.Debug.assert(convertedLoopState !== undefined);
-            var savedAllowedNonLabeledJumps = convertedLoopState.allowedNonLabeledJumps;
-            // for switch statement allow only non-labeled break
-            convertedLoopState.allowedNonLabeledJumps |= 2 /* Break */;
-            var result = ts.visitEachChild(node, visitor, context);
-            convertedLoopState.allowedNonLabeledJumps = savedAllowedNonLabeledJumps;
-            return result;
+            if (convertedLoopState !== undefined) {
+                var savedAllowedNonLabeledJumps = convertedLoopState.allowedNonLabeledJumps;
+                // for switch statement allow only non-labeled break
+                convertedLoopState.allowedNonLabeledJumps |= 2 /* Break */;
+                var result = ts.visitEachChild(node, visitor, context);
+                convertedLoopState.allowedNonLabeledJumps = savedAllowedNonLabeledJumps;
+                return result;
+            }
+            return ts.visitEachChild(node, visitor, context);
+        }
+        function visitCaseBlock(node) {
+            var ancestorFacts = enterSubtree(4032 /* BlockScopeExcludes */, 0 /* BlockScopeIncludes */);
+            var updated = ts.visitEachChild(node, visitor, context);
+            exitSubtree(ancestorFacts, 0 /* None */, 0 /* None */);
+            return updated;
+        }
+        function returnCapturedThis(node) {
+            return ts.setOriginalNode(ts.createReturn(ts.createIdentifier("_this")), node);
         }
         function visitReturnStatement(node) {
-            ts.Debug.assert(convertedLoopState !== undefined);
-            convertedLoopState.nonLocalJumps |= 8 /* Return */;
-            return ts.createReturn(ts.createObjectLiteral([
-                ts.createPropertyAssignment(ts.createIdentifier("value"), node.expression
-                    ? ts.visitNode(node.expression, visitor, ts.isExpression)
-                    : ts.createVoidZero())
-            ]));
+            if (convertedLoopState) {
+                convertedLoopState.nonLocalJumps |= 8 /* Return */;
+                if (isReturnVoidStatementInConstructorWithCapturedSuper(node)) {
+                    node = returnCapturedThis(node);
+                }
+                return ts.createReturn(ts.createObjectLiteral([
+                    ts.createPropertyAssignment(ts.createIdentifier("value"), node.expression
+                        ? ts.visitNode(node.expression, visitor, ts.isExpression)
+                        : ts.createVoidZero())
+                ]));
+            }
+            else if (isReturnVoidStatementInConstructorWithCapturedSuper(node)) {
+                return returnCapturedThis(node);
+            }
+            return ts.visitEachChild(node, visitor, context);
         }
         function visitThisKeyword(node) {
-            ts.Debug.assert(convertedLoopState !== undefined);
-            if (enclosingFunction && enclosingFunction.kind === 180 /* ArrowFunction */) {
-                // if the enclosing function is an ArrowFunction is then we use the captured 'this' keyword.
-                convertedLoopState.containsLexicalThis = true;
-                return node;
+            if (convertedLoopState) {
+                if (hierarchyFacts & 2 /* ArrowFunction */) {
+                    // if the enclosing function is an ArrowFunction then we use the captured 'this' keyword.
+                    convertedLoopState.containsLexicalThis = true;
+                    return node;
+                }
+                return convertedLoopState.thisName || (convertedLoopState.thisName = ts.createUniqueName("this"));
             }
-            return convertedLoopState.thisName || (convertedLoopState.thisName = ts.createUniqueName("this"));
+            return node;
         }
         function visitIdentifier(node) {
             if (!convertedLoopState) {
@@ -48915,7 +59067,7 @@ var ts;
             if (ts.isGeneratedIdentifier(node)) {
                 return node;
             }
-            if (node.text !== "arguments" && !resolver.isArgumentsLocalBinding(node)) {
+            if (node.text !== "arguments" || !resolver.isArgumentsLocalBinding(node)) {
                 return node;
             }
             return convertedLoopState.argumentsName || (convertedLoopState.argumentsName = ts.createUniqueName("arguments"));
@@ -48926,13 +59078,13 @@ var ts;
                 // it is possible if either
                 //   - break/continue is labeled and label is located inside the converted loop
                 //   - break/continue is non-labeled and located in non-converted loop/switch statement
-                var jump = node.kind === 210 /* BreakStatement */ ? 2 /* Break */ : 4 /* Continue */;
-                var canUseBreakOrContinue = (node.label && convertedLoopState.labels && convertedLoopState.labels[node.label.text]) ||
+                var jump = node.kind === 218 /* BreakStatement */ ? 2 /* Break */ : 4 /* Continue */;
+                var canUseBreakOrContinue = (node.label && convertedLoopState.labels && convertedLoopState.labels.get(node.label.text)) ||
                     (!node.label && (convertedLoopState.allowedNonLabeledJumps & jump));
                 if (!canUseBreakOrContinue) {
                     var labelMarker = void 0;
                     if (!node.label) {
-                        if (node.kind === 210 /* BreakStatement */) {
+                        if (node.kind === 218 /* BreakStatement */) {
                             convertedLoopState.nonLocalJumps |= 2 /* Break */;
                             labelMarker = "break";
                         }
@@ -48943,7 +59095,7 @@ var ts;
                         }
                     }
                     else {
-                        if (node.kind === 210 /* BreakStatement */) {
+                        if (node.kind === 218 /* BreakStatement */) {
                             labelMarker = "break-" + node.label.text;
                             setLabeledJump(convertedLoopState, /*isBreak*/ true, node.label.text, labelMarker);
                         }
@@ -48962,10 +59114,10 @@ var ts;
                                 expr = copyExpr;
                             }
                             else {
-                                expr = ts.createBinary(expr, 24 /* CommaToken */, copyExpr);
+                                expr = ts.createBinary(expr, 26 /* CommaToken */, copyExpr);
                             }
                         }
-                        returnExpression = ts.createBinary(expr, 24 /* CommaToken */, returnExpression);
+                        returnExpression = ts.createBinary(expr, 26 /* CommaToken */, returnExpression);
                     }
                     return ts.createReturn(returnExpression);
                 }
@@ -48987,33 +59139,30 @@ var ts;
             //          }
             //          return C;
             //      }());
-            var modifierFlags = ts.getModifierFlags(node);
-            var isExported = modifierFlags & 1 /* Export */;
-            var isDefault = modifierFlags & 512 /* Default */;
-            // Add an `export` modifier to the statement if needed (for `--target es5 --module es6`)
-            var modifiers = isExported && !isDefault
-                ? ts.filter(node.modifiers, isExportModifier)
-                : undefined;
-            var statement = ts.createVariableStatement(modifiers, ts.createVariableDeclarationList([
-                ts.createVariableDeclaration(getDeclarationName(node, /*allowComments*/ true), 
-                /*type*/ undefined, transformClassLikeDeclarationToExpression(node))
-            ]), 
-            /*location*/ node);
+            var variable = ts.createVariableDeclaration(ts.getLocalName(node, /*allowComments*/ true), 
+            /*type*/ undefined, transformClassLikeDeclarationToExpression(node));
+            ts.setOriginalNode(variable, node);
+            var statements = [];
+            var statement = ts.createVariableStatement(/*modifiers*/ undefined, ts.createVariableDeclarationList([variable]));
             ts.setOriginalNode(statement, node);
+            ts.setTextRange(statement, node);
             ts.startOnNewLine(statement);
+            statements.push(statement);
             // Add an `export default` statement for default exports (for `--target es5 --module es6`)
-            if (isExported && isDefault) {
-                var statements = [statement];
-                statements.push(ts.createExportAssignment(
-                /*decorators*/ undefined, 
-                /*modifiers*/ undefined, 
-                /*isExportEquals*/ false, getDeclarationName(node, /*allowComments*/ false)));
-                return statements;
+            if (ts.hasModifier(node, 1 /* Export */)) {
+                var exportStatement = ts.hasModifier(node, 512 /* Default */)
+                    ? ts.createExportDefault(ts.getLocalName(node))
+                    : ts.createExternalModuleExport(ts.getLocalName(node));
+                ts.setOriginalNode(exportStatement, statement);
+                statements.push(exportStatement);
             }
-            return statement;
-        }
-        function isExportModifier(node) {
-            return node.kind === 82 /* ExportKeyword */;
+            var emitFlags = ts.getEmitFlags(node);
+            if ((emitFlags & 4194304 /* HasEndOfDeclarationMarker */) === 0) {
+                // Add a DeclarationMarker as a marker for the end of the declaration
+                statements.push(ts.createEndOfDeclarationMarker(node));
+                ts.setEmitFlags(statement, emitFlags | 4194304 /* HasEndOfDeclarationMarker */);
+            }
+            return ts.singleOrMany(statements);
         }
         /**
          * Visits a ClassExpression and transforms it into an expression.
@@ -49065,24 +59214,25 @@ var ts;
             }
             var extendsClauseElement = ts.getClassExtendsHeritageClauseElement(node);
             var classFunction = ts.createFunctionExpression(
+            /*modifiers*/ undefined, 
             /*asteriskToken*/ undefined, 
             /*name*/ undefined, 
-            /*typeParameters*/ undefined, extendsClauseElement ? [ts.createParameter("_super")] : [], 
+            /*typeParameters*/ undefined, extendsClauseElement ? [ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, "_super")] : [], 
             /*type*/ undefined, transformClassBody(node, extendsClauseElement));
             // To preserve the behavior of the old emitter, we explicitly indent
             // the body of the function here if it was requested in an earlier
             // transformation.
-            if (ts.getEmitFlags(node) & 524288 /* Indented */) {
-                ts.setEmitFlags(classFunction, 524288 /* Indented */);
+            if (ts.getEmitFlags(node) & 65536 /* Indented */) {
+                ts.setEmitFlags(classFunction, 65536 /* Indented */);
             }
             // "inner" and "outer" below are added purely to preserve source map locations from
             // the old emitter
             var inner = ts.createPartiallyEmittedExpression(classFunction);
             inner.end = node.end;
-            ts.setEmitFlags(inner, 49152 /* NoComments */);
+            ts.setEmitFlags(inner, 1536 /* NoComments */);
             var outer = ts.createPartiallyEmittedExpression(inner);
             outer.end = ts.skipTrivia(currentText, node.pos);
-            ts.setEmitFlags(outer, 49152 /* NoComments */);
+            ts.setEmitFlags(outer, 1536 /* NoComments */);
             return ts.createParen(ts.createCall(outer, 
             /*typeArguments*/ undefined, extendsClauseElement
                 ? [ts.visitNode(extendsClauseElement.expression, visitor, ts.isExpression)]
@@ -49101,20 +59251,20 @@ var ts;
             addConstructor(statements, node, extendsClauseElement);
             addClassMembers(statements, node);
             // Create a synthetic text range for the return statement.
-            var closingBraceLocation = ts.createTokenRange(ts.skipTrivia(currentText, node.members.end), 16 /* CloseBraceToken */);
-            var localName = getLocalName(node);
+            var closingBraceLocation = ts.createTokenRange(ts.skipTrivia(currentText, node.members.end), 18 /* CloseBraceToken */);
+            var localName = ts.getInternalName(node);
             // The following partially-emitted expression exists purely to align our sourcemap
             // emit with the original emitter.
             var outer = ts.createPartiallyEmittedExpression(localName);
             outer.end = closingBraceLocation.end;
-            ts.setEmitFlags(outer, 49152 /* NoComments */);
+            ts.setEmitFlags(outer, 1536 /* NoComments */);
             var statement = ts.createReturn(outer);
             statement.pos = closingBraceLocation.pos;
-            ts.setEmitFlags(statement, 49152 /* NoComments */ | 12288 /* NoTokenSourceMaps */);
+            ts.setEmitFlags(statement, 1536 /* NoComments */ | 384 /* NoTokenSourceMaps */);
             statements.push(statement);
             ts.addRange(statements, endLexicalEnvironment());
-            var block = ts.createBlock(ts.createNodeArray(statements, /*location*/ node.members), /*location*/ undefined, /*multiLine*/ true);
-            ts.setEmitFlags(block, 49152 /* NoComments */);
+            var block = ts.createBlock(ts.setTextRange(ts.createNodeArray(statements), /*location*/ node.members), /*multiLine*/ true);
+            ts.setEmitFlags(block, 1536 /* NoComments */);
             return block;
         }
         /**
@@ -49126,7 +59276,7 @@ var ts;
          */
         function addExtendsHelperIfNeeded(statements, node, extendsClauseElement) {
             if (extendsClauseElement) {
-                statements.push(ts.createStatement(ts.createExtendsHelper(currentSourceFile.externalHelpersModuleName, getDeclarationName(node)), 
+                statements.push(ts.setTextRange(ts.createStatement(createExtendsHelper(context, ts.getLocalName(node))), 
                 /*location*/ extendsClauseElement));
             }
         }
@@ -49138,19 +59288,24 @@ var ts;
          * @param extendsClauseElement The expression for the class `extends` clause.
          */
         function addConstructor(statements, node, extendsClauseElement) {
+            var savedConvertedLoopState = convertedLoopState;
+            convertedLoopState = undefined;
+            var ancestorFacts = enterSubtree(16278 /* ConstructorExcludes */, 73 /* ConstructorIncludes */);
             var constructor = ts.getFirstConstructorWithBody(node);
             var hasSynthesizedSuper = hasSynthesizedDefaultSuperCall(constructor, extendsClauseElement !== undefined);
             var constructorFunction = ts.createFunctionDeclaration(
             /*decorators*/ undefined, 
             /*modifiers*/ undefined, 
-            /*asteriskToken*/ undefined, getDeclarationName(node), 
+            /*asteriskToken*/ undefined, ts.getInternalName(node), 
             /*typeParameters*/ undefined, transformConstructorParameters(constructor, hasSynthesizedSuper), 
-            /*type*/ undefined, transformConstructorBody(constructor, node, extendsClauseElement, hasSynthesizedSuper), 
-            /*location*/ constructor || node);
+            /*type*/ undefined, transformConstructorBody(constructor, node, extendsClauseElement, hasSynthesizedSuper));
+            ts.setTextRange(constructorFunction, constructor || node);
             if (extendsClauseElement) {
-                ts.setEmitFlags(constructorFunction, 256 /* CapturesThis */);
+                ts.setEmitFlags(constructorFunction, 8 /* CapturesThis */);
             }
             statements.push(constructorFunction);
+            exitSubtree(ancestorFacts, 49152 /* PropagateNewTargetMask */, 0 /* None */);
+            convertedLoopState = savedConvertedLoopState;
         }
         /**
          * Transforms the parameters of the constructor declaration of a class.
@@ -49165,10 +59320,8 @@ var ts;
             // `super` call.
             // If this is the case, we do not include the synthetic `...args` parameter and
             // will instead use the `arguments` object in ES5/3.
-            if (constructor && !hasSynthesizedSuper) {
-                return ts.visitNodes(constructor.parameters, visitor, ts.isParameter);
-            }
-            return [];
+            return ts.visitParameterList(constructor && !hasSynthesizedSuper && constructor.parameters, visitor, context)
+                || [];
         }
         /**
          * Transforms the body of a constructor declaration of a class.
@@ -49181,46 +59334,57 @@ var ts;
          */
         function transformConstructorBody(constructor, node, extendsClauseElement, hasSynthesizedSuper) {
             var statements = [];
-            startLexicalEnvironment();
+            resumeLexicalEnvironment();
             var statementOffset = -1;
             if (hasSynthesizedSuper) {
                 // If a super call has already been synthesized,
                 // we're going to assume that we should just transform everything after that.
                 // The assumption is that no prior step in the pipeline has added any prologue directives.
-                statementOffset = 1;
+                statementOffset = 0;
             }
             else if (constructor) {
-                // Otherwise, try to emit all potential prologue directives first.
-                statementOffset = ts.addPrologueDirectives(statements, constructor.body.statements, /*ensureUseStrict*/ false, visitor);
+                statementOffset = ts.addStandardPrologue(statements, constructor.body.statements, /*ensureUseStrict*/ false);
             }
             if (constructor) {
                 addDefaultValueAssignmentsIfNeeded(statements, constructor);
                 addRestParameterIfNeeded(statements, constructor, hasSynthesizedSuper);
+                if (!hasSynthesizedSuper) {
+                    // If no super call has been synthesized, emit custom prologue directives.
+                    statementOffset = ts.addCustomPrologue(statements, constructor.body.statements, statementOffset, visitor);
+                }
                 ts.Debug.assert(statementOffset >= 0, "statementOffset not initialized correctly!");
             }
-            var superCaptureStatus = declareOrCaptureOrReturnThisForConstructorIfNeeded(statements, constructor, !!extendsClauseElement, hasSynthesizedSuper, statementOffset);
+            // determine whether the class is known syntactically to be a derived class (e.g. a
+            // class that extends a value that is not syntactically known to be `null`).
+            var isDerivedClass = extendsClauseElement && ts.skipOuterExpressions(extendsClauseElement.expression).kind !== 95 /* NullKeyword */;
+            var superCaptureStatus = declareOrCaptureOrReturnThisForConstructorIfNeeded(statements, constructor, isDerivedClass, hasSynthesizedSuper, statementOffset);
             // The last statement expression was replaced. Skip it.
             if (superCaptureStatus === 1 /* ReplaceSuperCapture */ || superCaptureStatus === 2 /* ReplaceWithReturn */) {
                 statementOffset++;
             }
             if (constructor) {
-                var body = saveStateAndInvoke(constructor, function (constructor) { return ts.visitNodes(constructor.body.statements, visitor, ts.isStatement, /*start*/ statementOffset); });
-                ts.addRange(statements, body);
+                if (superCaptureStatus === 1 /* ReplaceSuperCapture */) {
+                    hierarchyFacts |= 4096 /* ConstructorWithCapturedSuper */;
+                }
+                ts.addRange(statements, ts.visitNodes(constructor.body.statements, visitor, ts.isStatement, /*start*/ statementOffset));
             }
             // Return `_this` unless we're sure enough that it would be pointless to add a return statement.
             // If there's a constructor that we can tell returns in enough places, then we *do not* want to add a return.
-            if (extendsClauseElement
+            if (isDerivedClass
                 && superCaptureStatus !== 2 /* ReplaceWithReturn */
                 && !(constructor && isSufficientlyCoveredByReturnStatements(constructor.body))) {
                 statements.push(ts.createReturn(ts.createIdentifier("_this")));
             }
             ts.addRange(statements, endLexicalEnvironment());
-            var block = ts.createBlock(ts.createNodeArray(statements, 
+            if (constructor) {
+                prependCaptureNewTargetIfNeeded(statements, constructor, /*copyOnWrite*/ false);
+            }
+            var block = ts.createBlock(ts.setTextRange(ts.createNodeArray(statements), 
             /*location*/ constructor ? constructor.body.statements : node.members), 
-            /*location*/ constructor ? constructor.body : node, 
             /*multiLine*/ true);
+            ts.setTextRange(block, constructor ? constructor.body : node);
             if (!constructor) {
-                ts.setEmitFlags(block, 49152 /* NoComments */);
+                ts.setEmitFlags(block, 1536 /* NoComments */);
             }
             return block;
         }
@@ -49231,17 +59395,17 @@ var ts;
          */
         function isSufficientlyCoveredByReturnStatements(statement) {
             // A return statement is considered covered.
-            if (statement.kind === 211 /* ReturnStatement */) {
+            if (statement.kind === 219 /* ReturnStatement */) {
                 return true;
             }
-            else if (statement.kind === 203 /* IfStatement */) {
+            else if (statement.kind === 211 /* IfStatement */) {
                 var ifStatement = statement;
                 if (ifStatement.elseStatement) {
                     return isSufficientlyCoveredByReturnStatements(ifStatement.thenStatement) &&
                         isSufficientlyCoveredByReturnStatements(ifStatement.elseStatement);
                 }
             }
-            else if (statement.kind === 199 /* Block */) {
+            else if (statement.kind === 207 /* Block */) {
                 var lastStatement = ts.lastOrUndefined(statement.statements);
                 if (lastStatement && isSufficientlyCoveredByReturnStatements(lastStatement)) {
                     return true;
@@ -49254,9 +59418,9 @@ var ts;
          *
          * @returns The new statement offset into the `statements` array.
          */
-        function declareOrCaptureOrReturnThisForConstructorIfNeeded(statements, ctor, hasExtendsClause, hasSynthesizedSuper, statementOffset) {
+        function declareOrCaptureOrReturnThisForConstructorIfNeeded(statements, ctor, isDerivedClass, hasSynthesizedSuper, statementOffset) {
             // If this isn't a derived class, just capture 'this' for arrow functions if necessary.
-            if (!hasExtendsClause) {
+            if (!isDerivedClass) {
                 if (ctor) {
                     addCaptureThisForNodeIfNeeded(statements, ctor);
                 }
@@ -49299,29 +59463,38 @@ var ts;
             var ctorStatements = ctor.body.statements;
             if (statementOffset < ctorStatements.length) {
                 firstStatement = ctorStatements[statementOffset];
-                if (firstStatement.kind === 202 /* ExpressionStatement */ && ts.isSuperCallExpression(firstStatement.expression)) {
-                    var superCall = firstStatement.expression;
-                    superCallExpression = ts.setOriginalNode(saveStateAndInvoke(superCall, visitImmediateSuperCallInBody), superCall);
-                }
-            }
-            // Return the result if we have an immediate super() call on the last statement.
-            if (superCallExpression && statementOffset === ctorStatements.length - 1) {
-                statements.push(ts.createReturn(superCallExpression));
+                if (firstStatement.kind === 210 /* ExpressionStatement */ && ts.isSuperCall(firstStatement.expression)) {
+                    superCallExpression = visitImmediateSuperCallInBody(firstStatement.expression);
+                }
+            }
+            // Return the result if we have an immediate super() call on the last statement,
+            // but only if the constructor itself doesn't use 'this' elsewhere.
+            if (superCallExpression
+                && statementOffset === ctorStatements.length - 1
+                && !(ctor.transformFlags & (16384 /* ContainsLexicalThis */ | 32768 /* ContainsCapturedLexicalThis */))) {
+                var returnStatement = ts.createReturn(superCallExpression);
+                if (superCallExpression.kind !== 194 /* BinaryExpression */
+                    || superCallExpression.left.kind !== 181 /* CallExpression */) {
+                    ts.Debug.fail("Assumed generated super call would have form 'super.call(...) || this'.");
+                }
+                // Shift comments from the original super call to the return statement.
+                ts.setCommentRange(returnStatement, ts.getCommentRange(ts.setEmitFlags(superCallExpression.left, 1536 /* NoComments */)));
+                statements.push(returnStatement);
                 return 2 /* ReplaceWithReturn */;
             }
             // Perform the capture.
-            captureThisForNode(statements, ctor, superCallExpression, firstStatement);
+            captureThisForNode(statements, ctor, superCallExpression || createActualThis(), firstStatement);
             // If we're actually replacing the original statement, we need to signal this to the caller.
             if (superCallExpression) {
                 return 1 /* ReplaceSuperCapture */;
             }
             return 0 /* NoReplacement */;
         }
+        function createActualThis() {
+            return ts.setEmitFlags(ts.createThis(), 4 /* NoSubstitution */);
+        }
         function createDefaultSuperCallOrThis() {
-            var actualThis = ts.createThis();
-            ts.setEmitFlags(actualThis, 128 /* NoSubstitution */);
-            var superCall = ts.createFunctionApply(ts.createIdentifier("_super"), actualThis, ts.createIdentifier("arguments"));
-            return ts.createLogicalOr(superCall, actualThis);
+            return ts.createLogicalOr(ts.createLogicalAnd(ts.createStrictInequality(ts.createIdentifier("_super"), ts.createNull()), ts.createFunctionApply(ts.createIdentifier("_super"), createActualThis(), ts.createIdentifier("arguments"))), createActualThis());
         }
         /**
          * Visits a parameter declaration.
@@ -49336,15 +59509,25 @@ var ts;
             else if (ts.isBindingPattern(node.name)) {
                 // Binding patterns are converted into a generated name and are
                 // evaluated inside the function body.
-                return ts.setOriginalNode(ts.createParameter(ts.getGeneratedNameForNode(node), 
-                /*initializer*/ undefined, 
+                return ts.setOriginalNode(ts.setTextRange(ts.createParameter(
+                /*decorators*/ undefined, 
+                /*modifiers*/ undefined, 
+                /*dotDotDotToken*/ undefined, ts.getGeneratedNameForNode(node), 
+                /*questionToken*/ undefined, 
+                /*type*/ undefined, 
+                /*initializer*/ undefined), 
                 /*location*/ node), 
                 /*original*/ node);
             }
             else if (node.initializer) {
                 // Initializers are elided
-                return ts.setOriginalNode(ts.createParameter(node.name, 
-                /*initializer*/ undefined, 
+                return ts.setOriginalNode(ts.setTextRange(ts.createParameter(
+                /*decorators*/ undefined, 
+                /*modifiers*/ undefined, 
+                /*dotDotDotToken*/ undefined, node.name, 
+                /*questionToken*/ undefined, 
+                /*type*/ undefined, 
+                /*initializer*/ undefined), 
                 /*location*/ node), 
                 /*original*/ node);
             }
@@ -49359,7 +59542,7 @@ var ts;
          * @param node A function-like node.
          */
         function shouldAddDefaultValueAssignments(node) {
-            return (node.transformFlags & 65536 /* ContainsDefaultValueAssignments */) !== 0;
+            return (node.transformFlags & 131072 /* ContainsDefaultValueAssignments */) !== 0;
         }
         /**
          * Adds statements to the body of a function-like node if it contains parameters with
@@ -49374,17 +59557,17 @@ var ts;
             }
             for (var _i = 0, _a = node.parameters; _i < _a.length; _i++) {
                 var parameter = _a[_i];
-                var name_35 = parameter.name, initializer = parameter.initializer, dotDotDotToken = parameter.dotDotDotToken;
+                var name_51 = parameter.name, initializer = parameter.initializer, dotDotDotToken = parameter.dotDotDotToken;
                 // A rest parameter cannot have a binding pattern or an initializer,
                 // so let's just ignore it.
                 if (dotDotDotToken) {
                     continue;
                 }
-                if (ts.isBindingPattern(name_35)) {
-                    addDefaultValueAssignmentForBindingPattern(statements, parameter, name_35, initializer);
+                if (ts.isBindingPattern(name_51)) {
+                    addDefaultValueAssignmentForBindingPattern(statements, parameter, name_51, initializer);
                 }
                 else if (initializer) {
-                    addDefaultValueAssignmentForInitializer(statements, parameter, name_35, initializer);
+                    addDefaultValueAssignmentForInitializer(statements, parameter, name_51, initializer);
                 }
             }
         }
@@ -49403,10 +59586,10 @@ var ts;
             // of an initializer, we must emit that expression to preserve side effects.
             if (name.elements.length > 0) {
                 statements.push(ts.setEmitFlags(ts.createVariableStatement(
-                /*modifiers*/ undefined, ts.createVariableDeclarationList(ts.flattenParameterDestructuring(context, parameter, temp, visitor))), 8388608 /* CustomPrologue */));
+                /*modifiers*/ undefined, ts.createVariableDeclarationList(ts.flattenDestructuringBinding(parameter, visitor, context, 0 /* All */, temp))), 1048576 /* CustomPrologue */));
             }
             else if (initializer) {
-                statements.push(ts.setEmitFlags(ts.createStatement(ts.createAssignment(temp, ts.visitNode(initializer, visitor, ts.isExpression))), 8388608 /* CustomPrologue */));
+                statements.push(ts.setEmitFlags(ts.createStatement(ts.createAssignment(temp, ts.visitNode(initializer, visitor, ts.isExpression))), 1048576 /* CustomPrologue */));
             }
         }
         /**
@@ -49419,14 +59602,12 @@ var ts;
          */
         function addDefaultValueAssignmentForInitializer(statements, parameter, name, initializer) {
             initializer = ts.visitNode(initializer, visitor, ts.isExpression);
-            var statement = ts.createIf(ts.createStrictEquality(ts.getSynthesizedClone(name), ts.createVoidZero()), ts.setEmitFlags(ts.createBlock([
-                ts.createStatement(ts.createAssignment(ts.setEmitFlags(ts.getMutableClone(name), 1536 /* NoSourceMap */), ts.setEmitFlags(initializer, 1536 /* NoSourceMap */ | ts.getEmitFlags(initializer)), 
-                /*location*/ parameter))
-            ], /*location*/ parameter), 32 /* SingleLine */ | 1024 /* NoTrailingSourceMap */ | 12288 /* NoTokenSourceMaps */), 
-            /*elseStatement*/ undefined, 
-            /*location*/ parameter);
+            var statement = ts.createIf(ts.createTypeCheck(ts.getSynthesizedClone(name), "undefined"), ts.setEmitFlags(ts.setTextRange(ts.createBlock([
+                ts.createStatement(ts.setTextRange(ts.createAssignment(ts.setEmitFlags(ts.getMutableClone(name), 48 /* NoSourceMap */), ts.setEmitFlags(initializer, 48 /* NoSourceMap */ | ts.getEmitFlags(initializer))), parameter))
+            ]), parameter), 1 /* SingleLine */ | 32 /* NoTrailingSourceMap */ | 384 /* NoTokenSourceMaps */));
             statement.startsOnNewLine = true;
-            ts.setEmitFlags(statement, 12288 /* NoTokenSourceMaps */ | 1024 /* NoTrailingSourceMap */ | 8388608 /* CustomPrologue */);
+            ts.setTextRange(statement, parameter);
+            ts.setEmitFlags(statement, 384 /* NoTokenSourceMaps */ | 32 /* NoTrailingSourceMap */ | 1048576 /* CustomPrologue */);
             statements.push(statement);
         }
         /**
@@ -49438,7 +59619,7 @@ var ts;
          *                                          synthesized call to `super`
          */
         function shouldAddRestParameter(node, inConstructorWithSynthesizedSuper) {
-            return node && node.dotDotDotToken && node.name.kind === 69 /* Identifier */ && !inConstructorWithSynthesizedSuper;
+            return node && node.dotDotDotToken && node.name.kind === 71 /* Identifier */ && !inConstructorWithSynthesizedSuper;
         }
         /**
          * Adds statements to the body of a function-like node if it contains a rest parameter.
@@ -49456,29 +59637,30 @@ var ts;
             }
             // `declarationName` is the name of the local declaration for the parameter.
             var declarationName = ts.getMutableClone(parameter.name);
-            ts.setEmitFlags(declarationName, 1536 /* NoSourceMap */);
+            ts.setEmitFlags(declarationName, 48 /* NoSourceMap */);
             // `expressionName` is the name of the parameter used in expressions.
             var expressionName = ts.getSynthesizedClone(parameter.name);
             var restIndex = node.parameters.length - 1;
             var temp = ts.createLoopVariable();
             // var param = [];
-            statements.push(ts.setEmitFlags(ts.createVariableStatement(
+            statements.push(ts.setEmitFlags(ts.setTextRange(ts.createVariableStatement(
             /*modifiers*/ undefined, ts.createVariableDeclarationList([
                 ts.createVariableDeclaration(declarationName, 
                 /*type*/ undefined, ts.createArrayLiteral([]))
-            ]), 
-            /*location*/ parameter), 8388608 /* CustomPrologue */));
+            ])), 
+            /*location*/ parameter), 1048576 /* CustomPrologue */));
             // for (var _i = restIndex; _i < arguments.length; _i++) {
             //   param[_i - restIndex] = arguments[_i];
             // }
-            var forStatement = ts.createFor(ts.createVariableDeclarationList([
+            var forStatement = ts.createFor(ts.setTextRange(ts.createVariableDeclarationList([
                 ts.createVariableDeclaration(temp, /*type*/ undefined, ts.createLiteral(restIndex))
-            ], /*location*/ parameter), ts.createLessThan(temp, ts.createPropertyAccess(ts.createIdentifier("arguments"), "length"), 
-            /*location*/ parameter), ts.createPostfixIncrement(temp, /*location*/ parameter), ts.createBlock([
-                ts.startOnNewLine(ts.createStatement(ts.createAssignment(ts.createElementAccess(expressionName, ts.createSubtract(temp, ts.createLiteral(restIndex))), ts.createElementAccess(ts.createIdentifier("arguments"), temp)), 
+            ]), parameter), ts.setTextRange(ts.createLessThan(temp, ts.createPropertyAccess(ts.createIdentifier("arguments"), "length")), parameter), ts.setTextRange(ts.createPostfixIncrement(temp), parameter), ts.createBlock([
+                ts.startOnNewLine(ts.setTextRange(ts.createStatement(ts.createAssignment(ts.createElementAccess(expressionName, restIndex === 0
+                    ? temp
+                    : ts.createSubtract(temp, ts.createLiteral(restIndex))), ts.createElementAccess(ts.createIdentifier("arguments"), temp))), 
                 /*location*/ parameter))
             ]));
-            ts.setEmitFlags(forStatement, 8388608 /* CustomPrologue */);
+            ts.setEmitFlags(forStatement, 1048576 /* CustomPrologue */);
             ts.startOnNewLine(forStatement);
             statements.push(forStatement);
         }
@@ -49489,7 +59671,7 @@ var ts;
          * @param node A node.
          */
         function addCaptureThisForNodeIfNeeded(statements, node) {
-            if (node.transformFlags & 16384 /* ContainsCapturedLexicalThis */ && node.kind !== 180 /* ArrowFunction */) {
+            if (node.transformFlags & 32768 /* ContainsCapturedLexicalThis */ && node.kind !== 187 /* ArrowFunction */) {
                 captureThisForNode(statements, node, ts.createThis());
             }
         }
@@ -49499,11 +59681,52 @@ var ts;
             /*modifiers*/ undefined, ts.createVariableDeclarationList([
                 ts.createVariableDeclaration("_this", 
                 /*type*/ undefined, initializer)
-            ]), originalStatement);
-            ts.setEmitFlags(captureThisStatement, 49152 /* NoComments */ | 8388608 /* CustomPrologue */);
+            ]));
+            ts.setEmitFlags(captureThisStatement, 1536 /* NoComments */ | 1048576 /* CustomPrologue */);
+            ts.setTextRange(captureThisStatement, originalStatement);
             ts.setSourceMapRange(captureThisStatement, node);
             statements.push(captureThisStatement);
         }
+        function prependCaptureNewTargetIfNeeded(statements, node, copyOnWrite) {
+            if (hierarchyFacts & 16384 /* NewTarget */) {
+                var newTarget = void 0;
+                switch (node.kind) {
+                    case 187 /* ArrowFunction */:
+                        return statements;
+                    case 151 /* MethodDeclaration */:
+                    case 153 /* GetAccessor */:
+                    case 154 /* SetAccessor */:
+                        // Methods and accessors cannot be constructors, so 'new.target' will
+                        // always return 'undefined'.
+                        newTarget = ts.createVoidZero();
+                        break;
+                    case 152 /* Constructor */:
+                        // Class constructors can only be called with `new`, so `this.constructor`
+                        // should be relatively safe to use.
+                        newTarget = ts.createPropertyAccess(ts.setEmitFlags(ts.createThis(), 4 /* NoSubstitution */), "constructor");
+                        break;
+                    case 228 /* FunctionDeclaration */:
+                    case 186 /* FunctionExpression */:
+                        // Functions can be called or constructed, and may have a `this` due to
+                        // being a member or when calling an imported function via `other_1.f()`.
+                        newTarget = ts.createConditional(ts.createLogicalAnd(ts.setEmitFlags(ts.createThis(), 4 /* NoSubstitution */), ts.createBinary(ts.setEmitFlags(ts.createThis(), 4 /* NoSubstitution */), 93 /* InstanceOfKeyword */, ts.getLocalName(node))), ts.createPropertyAccess(ts.setEmitFlags(ts.createThis(), 4 /* NoSubstitution */), "constructor"), ts.createVoidZero());
+                        break;
+                    default:
+                        ts.Debug.failBadSyntaxKind(node);
+                        break;
+                }
+                var captureNewTargetStatement = ts.createVariableStatement(
+                /*modifiers*/ undefined, ts.createVariableDeclarationList([
+                    ts.createVariableDeclaration("_newTarget", 
+                    /*type*/ undefined, newTarget)
+                ]));
+                if (copyOnWrite) {
+                    return [captureNewTargetStatement].concat(statements);
+                }
+                statements.unshift(captureNewTargetStatement);
+            }
+            return statements;
+        }
         /**
          * Adds statements to the class body function for a class to define the members of the
          * class.
@@ -49515,20 +59738,20 @@ var ts;
             for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
                 var member = _a[_i];
                 switch (member.kind) {
-                    case 198 /* SemicolonClassElement */:
+                    case 206 /* SemicolonClassElement */:
                         statements.push(transformSemicolonClassElementToStatement(member));
                         break;
-                    case 147 /* MethodDeclaration */:
-                        statements.push(transformClassMethodDeclarationToStatement(getClassMemberPrefix(node, member), member));
+                    case 151 /* MethodDeclaration */:
+                        statements.push(transformClassMethodDeclarationToStatement(getClassMemberPrefix(node, member), member, node));
                         break;
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
+                    case 153 /* GetAccessor */:
+                    case 154 /* SetAccessor */:
                         var accessors = ts.getAllAccessorDeclarations(node.members, member);
                         if (member === accessors.firstAccessor) {
-                            statements.push(transformAccessorsToStatement(getClassMemberPrefix(node, member), accessors));
+                            statements.push(transformAccessorsToStatement(getClassMemberPrefix(node, member), accessors, node));
                         }
                         break;
-                    case 148 /* Constructor */:
+                    case 152 /* Constructor */:
                         // Constructors are handled in visitClassExpression/visitClassDeclaration
                         break;
                     default:
@@ -49543,7 +59766,7 @@ var ts;
          * @param member The SemicolonClassElement node.
          */
         function transformSemicolonClassElementToStatement(member) {
-            return ts.createEmptyStatement(/*location*/ member);
+            return ts.setTextRange(ts.createEmptyStatement(), member);
         }
         /**
          * Transforms a MethodDeclaration into a statement for a class body function.
@@ -49551,21 +59774,23 @@ var ts;
          * @param receiver The receiver for the member.
          * @param member The MethodDeclaration node.
          */
-        function transformClassMethodDeclarationToStatement(receiver, member) {
+        function transformClassMethodDeclarationToStatement(receiver, member, container) {
+            var ancestorFacts = enterSubtree(0 /* None */, 0 /* None */);
             var commentRange = ts.getCommentRange(member);
             var sourceMapRange = ts.getSourceMapRange(member);
-            var func = transformFunctionLikeToExpression(member, /*location*/ member, /*name*/ undefined);
-            ts.setEmitFlags(func, 49152 /* NoComments */);
-            ts.setSourceMapRange(func, sourceMapRange);
-            var statement = ts.createStatement(ts.createAssignment(ts.createMemberAccessForPropertyName(receiver, ts.visitNode(member.name, visitor, ts.isPropertyName), 
-            /*location*/ member.name), func), 
+            var memberName = ts.createMemberAccessForPropertyName(receiver, ts.visitNode(member.name, visitor, ts.isPropertyName), /*location*/ member.name);
+            var memberFunction = transformFunctionLikeToExpression(member, /*location*/ member, /*name*/ undefined, container);
+            ts.setEmitFlags(memberFunction, 1536 /* NoComments */);
+            ts.setSourceMapRange(memberFunction, sourceMapRange);
+            var statement = ts.setTextRange(ts.createStatement(ts.createAssignment(memberName, memberFunction)), 
             /*location*/ member);
             ts.setOriginalNode(statement, member);
             ts.setCommentRange(statement, commentRange);
             // The location for the statement is used to emit comments only.
             // No source map should be emitted for this statement to align with the
             // old emitter.
-            ts.setEmitFlags(statement, 1536 /* NoSourceMap */);
+            ts.setEmitFlags(statement, 48 /* NoSourceMap */);
+            exitSubtree(ancestorFacts, 49152 /* PropagateNewTargetMask */, hierarchyFacts & 49152 /* PropagateNewTargetMask */ ? 16384 /* NewTarget */ : 0 /* None */);
             return statement;
         }
         /**
@@ -49574,13 +59799,13 @@ var ts;
          * @param receiver The receiver for the member.
          * @param accessors The set of related get/set accessors.
          */
-        function transformAccessorsToStatement(receiver, accessors) {
-            var statement = ts.createStatement(transformAccessorsToExpression(receiver, accessors, /*startsOnNewLine*/ false), 
-            /*location*/ ts.getSourceMapRange(accessors.firstAccessor));
+        function transformAccessorsToStatement(receiver, accessors, container) {
+            var statement = ts.createStatement(transformAccessorsToExpression(receiver, accessors, container, /*startsOnNewLine*/ false));
             // The location for the statement is used to emit source maps only.
             // No comments should be emitted for this statement to align with the
             // old emitter.
-            ts.setEmitFlags(statement, 49152 /* NoComments */);
+            ts.setEmitFlags(statement, 1536 /* NoComments */);
+            ts.setSourceMapRange(statement, ts.getSourceMapRange(accessors.firstAccessor));
             return statement;
         }
         /**
@@ -49589,41 +59814,45 @@ var ts;
          *
          * @param receiver The receiver for the member.
          */
-        function transformAccessorsToExpression(receiver, _a, startsOnNewLine) {
+        function transformAccessorsToExpression(receiver, _a, container, startsOnNewLine) {
             var firstAccessor = _a.firstAccessor, getAccessor = _a.getAccessor, setAccessor = _a.setAccessor;
+            var ancestorFacts = enterSubtree(0 /* None */, 0 /* None */);
             // To align with source maps in the old emitter, the receiver and property name
             // arguments are both mapped contiguously to the accessor name.
             var target = ts.getMutableClone(receiver);
-            ts.setEmitFlags(target, 49152 /* NoComments */ | 1024 /* NoTrailingSourceMap */);
+            ts.setEmitFlags(target, 1536 /* NoComments */ | 32 /* NoTrailingSourceMap */);
             ts.setSourceMapRange(target, firstAccessor.name);
             var propertyName = ts.createExpressionForPropertyName(ts.visitNode(firstAccessor.name, visitor, ts.isPropertyName));
-            ts.setEmitFlags(propertyName, 49152 /* NoComments */ | 512 /* NoLeadingSourceMap */);
+            ts.setEmitFlags(propertyName, 1536 /* NoComments */ | 16 /* NoLeadingSourceMap */);
             ts.setSourceMapRange(propertyName, firstAccessor.name);
             var properties = [];
             if (getAccessor) {
-                var getterFunction = transformFunctionLikeToExpression(getAccessor, /*location*/ undefined, /*name*/ undefined);
+                var getterFunction = transformFunctionLikeToExpression(getAccessor, /*location*/ undefined, /*name*/ undefined, container);
                 ts.setSourceMapRange(getterFunction, ts.getSourceMapRange(getAccessor));
+                ts.setEmitFlags(getterFunction, 512 /* NoLeadingComments */);
                 var getter = ts.createPropertyAssignment("get", getterFunction);
                 ts.setCommentRange(getter, ts.getCommentRange(getAccessor));
                 properties.push(getter);
             }
             if (setAccessor) {
-                var setterFunction = transformFunctionLikeToExpression(setAccessor, /*location*/ undefined, /*name*/ undefined);
+                var setterFunction = transformFunctionLikeToExpression(setAccessor, /*location*/ undefined, /*name*/ undefined, container);
                 ts.setSourceMapRange(setterFunction, ts.getSourceMapRange(setAccessor));
+                ts.setEmitFlags(setterFunction, 512 /* NoLeadingComments */);
                 var setter = ts.createPropertyAssignment("set", setterFunction);
                 ts.setCommentRange(setter, ts.getCommentRange(setAccessor));
                 properties.push(setter);
             }
-            properties.push(ts.createPropertyAssignment("enumerable", ts.createLiteral(true)), ts.createPropertyAssignment("configurable", ts.createLiteral(true)));
+            properties.push(ts.createPropertyAssignment("enumerable", ts.createTrue()), ts.createPropertyAssignment("configurable", ts.createTrue()));
             var call = ts.createCall(ts.createPropertyAccess(ts.createIdentifier("Object"), "defineProperty"), 
             /*typeArguments*/ undefined, [
                 target,
                 propertyName,
-                ts.createObjectLiteral(properties, /*location*/ undefined, /*multiLine*/ true)
+                ts.createObjectLiteral(properties, /*multiLine*/ true)
             ]);
             if (startsOnNewLine) {
                 call.startsOnNewLine = true;
             }
+            exitSubtree(ancestorFacts, 49152 /* PropagateNewTargetMask */, hierarchyFacts & 49152 /* PropagateNewTargetMask */ ? 16384 /* NewTarget */ : 0 /* None */);
             return call;
         }
         /**
@@ -49632,11 +59861,23 @@ var ts;
          * @param node An ArrowFunction node.
          */
         function visitArrowFunction(node) {
-            if (node.transformFlags & 8192 /* ContainsLexicalThis */) {
+            if (node.transformFlags & 16384 /* ContainsLexicalThis */) {
                 enableSubstitutionsForCapturedThis();
             }
-            var func = transformFunctionLikeToExpression(node, /*location*/ node, /*name*/ undefined);
-            ts.setEmitFlags(func, 256 /* CapturesThis */);
+            var savedConvertedLoopState = convertedLoopState;
+            convertedLoopState = undefined;
+            var ancestorFacts = enterSubtree(16256 /* ArrowFunctionExcludes */, 66 /* ArrowFunctionIncludes */);
+            var func = ts.createFunctionExpression(
+            /*modifiers*/ undefined, 
+            /*asteriskToken*/ undefined, 
+            /*name*/ undefined, 
+            /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
+            /*type*/ undefined, transformFunctionBody(node));
+            ts.setTextRange(func, node);
+            ts.setOriginalNode(func, node);
+            ts.setEmitFlags(func, 8 /* CapturesThis */);
+            exitSubtree(ancestorFacts, 0 /* None */, 0 /* None */);
+            convertedLoopState = savedConvertedLoopState;
             return func;
         }
         /**
@@ -49645,7 +59886,24 @@ var ts;
          * @param node a FunctionExpression node.
          */
         function visitFunctionExpression(node) {
-            return transformFunctionLikeToExpression(node, /*location*/ node, node.name);
+            var ancestorFacts = ts.getEmitFlags(node) & 262144 /* AsyncFunctionBody */
+                ? enterSubtree(16278 /* AsyncFunctionBodyExcludes */, 69 /* AsyncFunctionBodyIncludes */)
+                : enterSubtree(16286 /* FunctionExcludes */, 65 /* FunctionIncludes */);
+            var savedConvertedLoopState = convertedLoopState;
+            convertedLoopState = undefined;
+            var parameters = ts.visitParameterList(node.parameters, visitor, context);
+            var body = node.transformFlags & 64 /* ES2015 */
+                ? transformFunctionBody(node)
+                : visitFunctionBodyDownLevel(node);
+            var name = hierarchyFacts & 16384 /* NewTarget */
+                ? ts.getLocalName(node)
+                : node.name;
+            exitSubtree(ancestorFacts, 49152 /* PropagateNewTargetMask */, 0 /* None */);
+            convertedLoopState = savedConvertedLoopState;
+            return ts.updateFunctionExpression(node, 
+            /*modifiers*/ undefined, node.asteriskToken, name, 
+            /*typeParameters*/ undefined, parameters, 
+            /*type*/ undefined, body);
         }
         /**
          * Visits a FunctionDeclaration node.
@@ -49653,12 +59911,22 @@ var ts;
          * @param node a FunctionDeclaration node.
          */
         function visitFunctionDeclaration(node) {
-            return ts.setOriginalNode(ts.createFunctionDeclaration(
-            /*decorators*/ undefined, node.modifiers, node.asteriskToken, node.name, 
-            /*typeParameters*/ undefined, ts.visitNodes(node.parameters, visitor, ts.isParameter), 
-            /*type*/ undefined, transformFunctionBody(node), 
-            /*location*/ node), 
-            /*original*/ node);
+            var savedConvertedLoopState = convertedLoopState;
+            convertedLoopState = undefined;
+            var ancestorFacts = enterSubtree(16286 /* FunctionExcludes */, 65 /* FunctionIncludes */);
+            var parameters = ts.visitParameterList(node.parameters, visitor, context);
+            var body = node.transformFlags & 64 /* ES2015 */
+                ? transformFunctionBody(node)
+                : visitFunctionBodyDownLevel(node);
+            var name = hierarchyFacts & 16384 /* NewTarget */
+                ? ts.getLocalName(node)
+                : node.name;
+            exitSubtree(ancestorFacts, 49152 /* PropagateNewTargetMask */, 0 /* None */);
+            convertedLoopState = savedConvertedLoopState;
+            return ts.updateFunctionDeclaration(node, 
+            /*decorators*/ undefined, ts.visitNodes(node.modifiers, visitor, ts.isModifier), node.asteriskToken, name, 
+            /*typeParameters*/ undefined, parameters, 
+            /*type*/ undefined, body);
         }
         /**
          * Transforms a function-like node into a FunctionExpression.
@@ -49667,17 +59935,24 @@ var ts;
          * @param location The source-map location for the new FunctionExpression.
          * @param name The name of the new FunctionExpression.
          */
-        function transformFunctionLikeToExpression(node, location, name) {
-            var savedContainingNonArrowFunction = enclosingNonArrowFunction;
-            if (node.kind !== 180 /* ArrowFunction */) {
-                enclosingNonArrowFunction = node;
+        function transformFunctionLikeToExpression(node, location, name, container) {
+            var savedConvertedLoopState = convertedLoopState;
+            convertedLoopState = undefined;
+            var ancestorFacts = container && ts.isClassLike(container) && !ts.hasModifier(node, 32 /* Static */)
+                ? enterSubtree(16286 /* FunctionExcludes */, 65 /* FunctionIncludes */ | 8 /* NonStaticClassElement */)
+                : enterSubtree(16286 /* FunctionExcludes */, 65 /* FunctionIncludes */);
+            var parameters = ts.visitParameterList(node.parameters, visitor, context);
+            var body = transformFunctionBody(node);
+            if (hierarchyFacts & 16384 /* NewTarget */ && !name && (node.kind === 228 /* FunctionDeclaration */ || node.kind === 186 /* FunctionExpression */)) {
+                name = ts.getGeneratedNameForNode(node);
             }
-            var expression = ts.setOriginalNode(ts.createFunctionExpression(node.asteriskToken, name, 
-            /*typeParameters*/ undefined, ts.visitNodes(node.parameters, visitor, ts.isParameter), 
-            /*type*/ undefined, saveStateAndInvoke(node, transformFunctionBody), location), 
+            exitSubtree(ancestorFacts, 49152 /* PropagateNewTargetMask */, 0 /* None */);
+            convertedLoopState = savedConvertedLoopState;
+            return ts.setOriginalNode(ts.setTextRange(ts.createFunctionExpression(
+            /*modifiers*/ undefined, node.asteriskToken, name, 
+            /*typeParameters*/ undefined, parameters, 
+            /*type*/ undefined, body), location), 
             /*original*/ node);
-            enclosingNonArrowFunction = savedContainingNonArrowFunction;
-            return expression;
         }
         /**
          * Transforms the body of a function-like node.
@@ -49692,11 +59967,11 @@ var ts;
             var statements = [];
             var body = node.body;
             var statementOffset;
-            startLexicalEnvironment();
+            resumeLexicalEnvironment();
             if (ts.isBlock(body)) {
                 // ensureUseStrict is false because no new prologue-directive should be added.
-                // addPrologueDirectives will simply put already-existing directives at the beginning of the target statement-array
-                statementOffset = ts.addPrologueDirectives(statements, body.statements, /*ensureUseStrict*/ false, visitor);
+                // addStandardPrologue will put already-existing directives at the beginning of the target statement-array
+                statementOffset = ts.addStandardPrologue(statements, body.statements, /*ensureUseStrict*/ false);
             }
             addCaptureThisForNodeIfNeeded(statements, node);
             addDefaultValueAssignmentsIfNeeded(statements, node);
@@ -49706,6 +59981,8 @@ var ts;
                 multiLine = true;
             }
             if (ts.isBlock(body)) {
+                // addCustomPrologue puts already-existing directives at the beginning of the target statement-array
+                statementOffset = ts.addCustomPrologue(statements, body.statements, statementOffset, visitor);
                 statementsLocation = body.statements;
                 ts.addRange(statements, ts.visitNodes(body.statements, visitor, ts.isStatement, statementOffset));
                 // If the original body was a multi-line block, this must be a multi-line block.
@@ -49714,7 +59991,7 @@ var ts;
                 }
             }
             else {
-                ts.Debug.assert(node.kind === 180 /* ArrowFunction */);
+                ts.Debug.assert(node.kind === 187 /* ArrowFunction */);
                 // To align with the old emitter, we use a synthetic end position on the location
                 // for the statement list we synthesize when we down-level an arrow function with
                 // an expression function body. This prevents both comments and source maps from
@@ -49730,29 +60007,49 @@ var ts;
                     }
                 }
                 var expression = ts.visitNode(body, visitor, ts.isExpression);
-                var returnStatement = ts.createReturn(expression, /*location*/ body);
-                ts.setEmitFlags(returnStatement, 12288 /* NoTokenSourceMaps */ | 1024 /* NoTrailingSourceMap */ | 32768 /* NoTrailingComments */);
+                var returnStatement = ts.createReturn(expression);
+                ts.setTextRange(returnStatement, body);
+                ts.setEmitFlags(returnStatement, 384 /* NoTokenSourceMaps */ | 32 /* NoTrailingSourceMap */ | 1024 /* NoTrailingComments */);
                 statements.push(returnStatement);
                 // To align with the source map emit for the old emitter, we set a custom
                 // source map location for the close brace.
                 closeBraceLocation = body;
             }
-            var lexicalEnvironment = endLexicalEnvironment();
+            var lexicalEnvironment = context.endLexicalEnvironment();
             ts.addRange(statements, lexicalEnvironment);
+            prependCaptureNewTargetIfNeeded(statements, node, /*copyOnWrite*/ false);
             // If we added any final generated statements, this must be a multi-line block
             if (!multiLine && lexicalEnvironment && lexicalEnvironment.length) {
                 multiLine = true;
             }
-            var block = ts.createBlock(ts.createNodeArray(statements, statementsLocation), node.body, multiLine);
+            var block = ts.createBlock(ts.setTextRange(ts.createNodeArray(statements), statementsLocation), multiLine);
+            ts.setTextRange(block, node.body);
             if (!multiLine && singleLine) {
-                ts.setEmitFlags(block, 32 /* SingleLine */);
+                ts.setEmitFlags(block, 1 /* SingleLine */);
             }
             if (closeBraceLocation) {
-                ts.setTokenSourceMapRange(block, 16 /* CloseBraceToken */, closeBraceLocation);
+                ts.setTokenSourceMapRange(block, 18 /* CloseBraceToken */, closeBraceLocation);
             }
             ts.setOriginalNode(block, node.body);
             return block;
         }
+        function visitFunctionBodyDownLevel(node) {
+            var updated = ts.visitFunctionBody(node.body, functionBodyVisitor, context);
+            return ts.updateBlock(updated, ts.setTextRange(ts.createNodeArray(prependCaptureNewTargetIfNeeded(updated.statements, node, /*copyOnWrite*/ true)), 
+            /*location*/ updated.statements));
+        }
+        function visitBlock(node, isFunctionBody) {
+            if (isFunctionBody) {
+                // A function body is not a block scope.
+                return ts.visitEachChild(node, visitor, context);
+            }
+            var ancestorFacts = hierarchyFacts & 256 /* IterationStatement */
+                ? enterSubtree(4032 /* IterationStatementBlockExcludes */, 512 /* IterationStatementBlockIncludes */)
+                : enterSubtree(3904 /* BlockExcludes */, 128 /* BlockIncludes */);
+            var updated = ts.visitEachChild(node, visitor, context);
+            exitSubtree(ancestorFacts, 0 /* None */, 0 /* None */);
+            return updated;
+        }
         /**
          * Visits an ExpressionStatement that contains a destructuring assignment.
          *
@@ -49761,9 +60058,9 @@ var ts;
         function visitExpressionStatement(node) {
             // If we are here it is most likely because our expression is a destructuring assignment.
             switch (node.expression.kind) {
-                case 178 /* ParenthesizedExpression */:
+                case 185 /* ParenthesizedExpression */:
                     return ts.updateStatement(node, visitParenthesizedExpression(node.expression, /*needsDestructuringValue*/ false));
-                case 187 /* BinaryExpression */:
+                case 194 /* BinaryExpression */:
                     return ts.updateStatement(node, visitBinaryExpression(node.expression, /*needsDestructuringValue*/ false));
             }
             return ts.visitEachChild(node, visitor, context);
@@ -49777,14 +60074,15 @@ var ts;
          */
         function visitParenthesizedExpression(node, needsDestructuringValue) {
             // If we are here it is most likely because our expression is a destructuring assignment.
-            if (needsDestructuringValue) {
+            if (!needsDestructuringValue) {
+                // By default we always emit the RHS at the end of a flattened destructuring
+                // expression. If we are in a state where we do not need the destructuring value,
+                // we pass that information along to the children that care about it.
                 switch (node.expression.kind) {
-                    case 178 /* ParenthesizedExpression */:
-                        return ts.createParen(visitParenthesizedExpression(node.expression, /*needsDestructuringValue*/ true), 
-                        /*location*/ node);
-                    case 187 /* BinaryExpression */:
-                        return ts.createParen(visitBinaryExpression(node.expression, /*needsDestructuringValue*/ true), 
-                        /*location*/ node);
+                    case 185 /* ParenthesizedExpression */:
+                        return ts.updateParen(node, visitParenthesizedExpression(node.expression, /*needsDestructuringValue*/ false));
+                    case 194 /* BinaryExpression */:
+                        return ts.updateParen(node, visitBinaryExpression(node.expression, /*needsDestructuringValue*/ false));
                 }
             }
             return ts.visitEachChild(node, visitor, context);
@@ -49798,11 +60096,15 @@ var ts;
          */
         function visitBinaryExpression(node, needsDestructuringValue) {
             // If we are here it is because this is a destructuring assignment.
-            ts.Debug.assert(ts.isDestructuringAssignment(node));
-            return ts.flattenDestructuringAssignment(context, node, needsDestructuringValue, hoistVariableDeclaration, visitor);
+            if (ts.isDestructuringAssignment(node)) {
+                return ts.flattenDestructuringAssignment(node, visitor, context, 0 /* All */, needsDestructuringValue);
+            }
+            return ts.visitEachChild(node, visitor, context);
         }
         function visitVariableStatement(node) {
-            if (convertedLoopState && (ts.getCombinedNodeFlags(node.declarationList) & 3 /* BlockScoped */) == 0) {
+            var ancestorFacts = enterSubtree(0 /* None */, ts.hasModifier(node, 1 /* Export */) ? 32 /* ExportedVariableStatement */ : 0 /* None */);
+            var updated;
+            if (convertedLoopState && (node.declarationList.flags & 3 /* BlockScoped */) === 0) {
                 // we are inside a converted loop - hoist variable declarations
                 var assignments = void 0;
                 for (var _i = 0, _a = node.declarationList.declarations; _i < _a.length; _i++) {
@@ -49811,23 +60113,28 @@ var ts;
                     if (decl.initializer) {
                         var assignment = void 0;
                         if (ts.isBindingPattern(decl.name)) {
-                            assignment = ts.flattenVariableDestructuringToExpression(context, decl, hoistVariableDeclaration, /*nameSubstitution*/ undefined, visitor);
+                            assignment = ts.flattenDestructuringAssignment(decl, visitor, context, 0 /* All */);
                         }
                         else {
-                            assignment = ts.createBinary(decl.name, 56 /* EqualsToken */, decl.initializer);
+                            assignment = ts.createBinary(decl.name, 58 /* EqualsToken */, ts.visitNode(decl.initializer, visitor, ts.isExpression));
+                            ts.setTextRange(assignment, decl);
                         }
-                        (assignments || (assignments = [])).push(assignment);
+                        assignments = ts.append(assignments, assignment);
                     }
                 }
                 if (assignments) {
-                    return ts.createStatement(ts.reduceLeft(assignments, function (acc, v) { return ts.createBinary(v, 24 /* CommaToken */, acc); }), node);
+                    updated = ts.setTextRange(ts.createStatement(ts.inlineExpressions(assignments)), node);
                 }
                 else {
                     // none of declarations has initializer - the entire variable statement can be deleted
-                    return undefined;
+                    updated = undefined;
                 }
             }
-            return ts.visitEachChild(node, visitor, context);
+            else {
+                updated = ts.visitEachChild(node, visitor, context);
+            }
+            exitSubtree(ancestorFacts, 0 /* None */, 0 /* None */);
+            return updated;
         }
         /**
          * Visits a VariableDeclarationList that is block scoped (e.g. `let` or `const`).
@@ -49835,25 +60142,29 @@ var ts;
          * @param node A VariableDeclarationList node.
          */
         function visitVariableDeclarationList(node) {
-            if (node.flags & 3 /* BlockScoped */) {
-                enableSubstitutionsForBlockScopedBindings();
-            }
-            var declarations = ts.flatten(ts.map(node.declarations, node.flags & 1 /* Let */
-                ? visitVariableDeclarationInLetDeclarationList
-                : visitVariableDeclaration));
-            var declarationList = ts.createVariableDeclarationList(declarations, /*location*/ node);
-            ts.setOriginalNode(declarationList, node);
-            ts.setCommentRange(declarationList, node);
-            if (node.transformFlags & 2097152 /* ContainsBindingPattern */
-                && (ts.isBindingPattern(node.declarations[0].name)
-                    || ts.isBindingPattern(ts.lastOrUndefined(node.declarations).name))) {
-                // If the first or last declaration is a binding pattern, we need to modify
-                // the source map range for the declaration list.
-                var firstDeclaration = ts.firstOrUndefined(declarations);
-                var lastDeclaration = ts.lastOrUndefined(declarations);
-                ts.setSourceMapRange(declarationList, ts.createRange(firstDeclaration.pos, lastDeclaration.end));
+            if (node.transformFlags & 64 /* ES2015 */) {
+                if (node.flags & 3 /* BlockScoped */) {
+                    enableSubstitutionsForBlockScopedBindings();
+                }
+                var declarations = ts.flatMap(node.declarations, node.flags & 1 /* Let */
+                    ? visitVariableDeclarationInLetDeclarationList
+                    : visitVariableDeclaration);
+                var declarationList = ts.createVariableDeclarationList(declarations);
+                ts.setOriginalNode(declarationList, node);
+                ts.setTextRange(declarationList, node);
+                ts.setCommentRange(declarationList, node);
+                if (node.transformFlags & 8388608 /* ContainsBindingPattern */
+                    && (ts.isBindingPattern(node.declarations[0].name)
+                        || ts.isBindingPattern(ts.lastOrUndefined(node.declarations).name))) {
+                    // If the first or last declaration is a binding pattern, we need to modify
+                    // the source map range for the declaration list.
+                    var firstDeclaration = ts.firstOrUndefined(declarations);
+                    var lastDeclaration = ts.lastOrUndefined(declarations);
+                    ts.setSourceMapRange(declarationList, ts.createRange(firstDeclaration.pos, lastDeclaration.end));
+                }
+                return declarationList;
             }
-            return declarationList;
+            return ts.visitEachChild(node, visitor, context);
         }
         /**
          * Gets a value indicating whether we should emit an explicit initializer for a variable
@@ -49904,18 +60215,16 @@ var ts;
             var flags = resolver.getNodeCheckFlags(node);
             var isCapturedInFunction = flags & 131072 /* CapturedBlockScopedBinding */;
             var isDeclaredInLoop = flags & 262144 /* BlockScopedBindingInLoop */;
-            var emittedAsTopLevel = ts.isBlockScopedContainerTopLevel(enclosingBlockScopeContainer)
+            var emittedAsTopLevel = (hierarchyFacts & 64 /* TopLevel */) !== 0
                 || (isCapturedInFunction
                     && isDeclaredInLoop
-                    && ts.isBlock(enclosingBlockScopeContainer)
-                    && ts.isIterationStatement(enclosingBlockScopeContainerParent, /*lookInLabeledStatements*/ false));
+                    && (hierarchyFacts & 512 /* IterationStatementBlock */) !== 0);
             var emitExplicitInitializer = !emittedAsTopLevel
-                && enclosingBlockScopeContainer.kind !== 207 /* ForInStatement */
-                && enclosingBlockScopeContainer.kind !== 208 /* ForOfStatement */
+                && (hierarchyFacts & 2048 /* ForInOrForOfStatement */) === 0
                 && (!resolver.isDeclarationWithCollidingName(node)
                     || (isDeclaredInLoop
                         && !isCapturedInFunction
-                        && !ts.isIterationStatement(enclosingBlockScopeContainer, /*lookInLabeledStatements*/ false)));
+                        && (hierarchyFacts & (1024 /* ForStatement */ | 2048 /* ForInOrForOfStatement */)) === 0));
             return emitExplicitInitializer;
         }
         /**
@@ -49932,9 +60241,9 @@ var ts;
                 return visitVariableDeclaration(node);
             }
             if (!node.initializer && shouldEmitExplicitInitializerForLetDeclaration(node)) {
-                var clone_5 = ts.getMutableClone(node);
-                clone_5.initializer = ts.createVoidZero();
-                return clone_5;
+                var clone_2 = ts.getMutableClone(node);
+                clone_2.initializer = ts.createVoidZero();
+                return clone_2;
             }
             return ts.visitEachChild(node, visitor, context);
         }
@@ -49944,99 +60253,77 @@ var ts;
          * @param node A VariableDeclaration node.
          */
         function visitVariableDeclaration(node) {
-            // If we are here it is because the name contains a binding pattern.
+            var ancestorFacts = enterSubtree(32 /* ExportedVariableStatement */, 0 /* None */);
+            var updated;
             if (ts.isBindingPattern(node.name)) {
-                var recordTempVariablesInLine = !enclosingVariableStatement
-                    || !ts.hasModifier(enclosingVariableStatement, 1 /* Export */);
-                return ts.flattenVariableDestructuring(context, node, /*value*/ undefined, visitor, recordTempVariablesInLine ? undefined : hoistVariableDeclaration);
-            }
-            return ts.visitEachChild(node, visitor, context);
-        }
-        function visitLabeledStatement(node) {
-            if (convertedLoopState) {
-                if (!convertedLoopState.labels) {
-                    convertedLoopState.labels = ts.createMap();
-                }
-                convertedLoopState.labels[node.label.text] = node.label.text;
-            }
-            var result;
-            if (ts.isIterationStatement(node.statement, /*lookInLabeledStatements*/ false) && shouldConvertIterationStatementBody(node.statement)) {
-                result = ts.visitNodes(ts.createNodeArray([node.statement]), visitor, ts.isStatement);
+                updated = ts.flattenDestructuringBinding(node, visitor, context, 0 /* All */, 
+                /*value*/ undefined, (ancestorFacts & 32 /* ExportedVariableStatement */) !== 0);
             }
             else {
-                result = ts.visitEachChild(node, visitor, context);
+                updated = ts.visitEachChild(node, visitor, context);
             }
-            if (convertedLoopState) {
-                convertedLoopState.labels[node.label.text] = undefined;
+            exitSubtree(ancestorFacts, 0 /* None */, 0 /* None */);
+            return updated;
+        }
+        function recordLabel(node) {
+            convertedLoopState.labels.set(node.label.text, node.label.text);
+        }
+        function resetLabel(node) {
+            convertedLoopState.labels.set(node.label.text, undefined);
+        }
+        function visitLabeledStatement(node) {
+            if (convertedLoopState && !convertedLoopState.labels) {
+                convertedLoopState.labels = ts.createMap();
             }
-            return result;
+            var statement = ts.unwrapInnermostStatementOfLabel(node, convertedLoopState && recordLabel);
+            return ts.isIterationStatement(statement, /*lookInLabeledStatements*/ false)
+                ? visitIterationStatement(statement, /*outermostLabeledStatement*/ node)
+                : ts.restoreEnclosingLabel(ts.visitNode(statement, visitor, ts.isStatement), node, convertedLoopState && resetLabel);
         }
-        function visitDoStatement(node) {
-            return convertIterationStatementBodyIfNecessary(node);
+        function visitIterationStatement(node, outermostLabeledStatement) {
+            switch (node.kind) {
+                case 212 /* DoStatement */:
+                case 213 /* WhileStatement */:
+                    return visitDoOrWhileStatement(node, outermostLabeledStatement);
+                case 214 /* ForStatement */:
+                    return visitForStatement(node, outermostLabeledStatement);
+                case 215 /* ForInStatement */:
+                    return visitForInStatement(node, outermostLabeledStatement);
+                case 216 /* ForOfStatement */:
+                    return visitForOfStatement(node, outermostLabeledStatement);
+            }
+        }
+        function visitIterationStatementWithFacts(excludeFacts, includeFacts, node, outermostLabeledStatement, convert) {
+            var ancestorFacts = enterSubtree(excludeFacts, includeFacts);
+            var updated = convertIterationStatementBodyIfNecessary(node, outermostLabeledStatement, convert);
+            exitSubtree(ancestorFacts, 0 /* None */, 0 /* None */);
+            return updated;
         }
-        function visitWhileStatement(node) {
-            return convertIterationStatementBodyIfNecessary(node);
+        function visitDoOrWhileStatement(node, outermostLabeledStatement) {
+            return visitIterationStatementWithFacts(0 /* DoOrWhileStatementExcludes */, 256 /* DoOrWhileStatementIncludes */, node, outermostLabeledStatement);
         }
-        function visitForStatement(node) {
-            return convertIterationStatementBodyIfNecessary(node);
+        function visitForStatement(node, outermostLabeledStatement) {
+            return visitIterationStatementWithFacts(3008 /* ForStatementExcludes */, 1280 /* ForStatementIncludes */, node, outermostLabeledStatement);
         }
-        function visitForInStatement(node) {
-            return convertIterationStatementBodyIfNecessary(node);
+        function visitForInStatement(node, outermostLabeledStatement) {
+            return visitIterationStatementWithFacts(1984 /* ForInOrForOfStatementExcludes */, 2304 /* ForInOrForOfStatementIncludes */, node, outermostLabeledStatement);
         }
-        /**
-         * Visits a ForOfStatement and converts it into a compatible ForStatement.
-         *
-         * @param node A ForOfStatement.
-         */
-        function visitForOfStatement(node) {
-            return convertIterationStatementBodyIfNecessary(node, convertForOfToFor);
+        function visitForOfStatement(node, outermostLabeledStatement) {
+            return visitIterationStatementWithFacts(1984 /* ForInOrForOfStatementExcludes */, 2304 /* ForInOrForOfStatementIncludes */, node, outermostLabeledStatement, compilerOptions.downlevelIteration ? convertForOfStatementForIterable : convertForOfStatementForArray);
         }
-        function convertForOfToFor(node, convertedLoopBodyStatements) {
-            // The following ES6 code:
-            //
-            //    for (let v of expr) { }
-            //
-            // should be emitted as
-            //
-            //    for (var _i = 0, _a = expr; _i < _a.length; _i++) {
-            //        var v = _a[_i];
-            //    }
-            //
-            // where _a and _i are temps emitted to capture the RHS and the counter,
-            // respectively.
-            // When the left hand side is an expression instead of a let declaration,
-            // the "let v" is not emitted.
-            // When the left hand side is a let/const, the v is renamed if there is
-            // another v in scope.
-            // Note that all assignments to the LHS are emitted in the body, including
-            // all destructuring.
-            // Note also that because an extra statement is needed to assign to the LHS,
-            // for-of bodies are always emitted as blocks.
-            var expression = ts.visitNode(node.expression, visitor, ts.isExpression);
-            var initializer = node.initializer;
+        function convertForOfStatementHead(node, boundValue, convertedLoopBodyStatements) {
             var statements = [];
-            // In the case where the user wrote an identifier as the RHS, like this:
-            //
-            //     for (let v of arr) { }
-            //
-            // we don't want to emit a temporary variable for the RHS, just use it directly.
-            var counter = ts.createLoopVariable();
-            var rhsReference = expression.kind === 69 /* Identifier */
-                ? ts.createUniqueName(expression.text)
-                : ts.createTempVariable(/*recordTempVariable*/ undefined);
-            // Initialize LHS
-            // var v = _a[_i];
-            if (ts.isVariableDeclarationList(initializer)) {
-                if (initializer.flags & 3 /* BlockScoped */) {
+            if (ts.isVariableDeclarationList(node.initializer)) {
+                if (node.initializer.flags & 3 /* BlockScoped */) {
                     enableSubstitutionsForBlockScopedBindings();
                 }
-                var firstOriginalDeclaration = ts.firstOrUndefined(initializer.declarations);
+                var firstOriginalDeclaration = ts.firstOrUndefined(node.initializer.declarations);
                 if (firstOriginalDeclaration && ts.isBindingPattern(firstOriginalDeclaration.name)) {
                     // This works whether the declaration is a var, let, or const.
                     // It will use rhsIterationValue _a[_i] as the initializer.
-                    var declarations = ts.flattenVariableDestructuring(context, firstOriginalDeclaration, ts.createElementAccess(rhsReference, counter), visitor);
-                    var declarationList = ts.createVariableDeclarationList(declarations, /*location*/ initializer);
-                    ts.setOriginalNode(declarationList, initializer);
+                    var declarations = ts.flattenDestructuringBinding(firstOriginalDeclaration, visitor, context, 0 /* All */, boundValue);
+                    var declarationList = ts.setTextRange(ts.createVariableDeclarationList(declarations), node.initializer);
+                    ts.setOriginalNode(declarationList, node.initializer);
                     // Adjust the source map range for the first declaration to align with the old
                     // emitter.
                     var firstDeclaration = declarations[0];
@@ -50048,28 +60335,24 @@ var ts;
                 else {
                     // The following call does not include the initializer, so we have
                     // to emit it separately.
-                    statements.push(ts.createVariableStatement(
-                    /*modifiers*/ undefined, ts.createVariableDeclarationList([
+                    statements.push(ts.setTextRange(ts.createVariableStatement(
+                    /*modifiers*/ undefined, ts.setOriginalNode(ts.setTextRange(ts.createVariableDeclarationList([
                         ts.createVariableDeclaration(firstOriginalDeclaration ? firstOriginalDeclaration.name : ts.createTempVariable(/*recordTempVariable*/ undefined), 
-                        /*type*/ undefined, ts.createElementAccess(rhsReference, counter))
-                    ], /*location*/ ts.moveRangePos(initializer, -1)), 
-                    /*location*/ ts.moveRangeEnd(initializer, -1)));
+                        /*type*/ undefined, boundValue)
+                    ]), ts.moveRangePos(node.initializer, -1)), node.initializer)), ts.moveRangeEnd(node.initializer, -1)));
                 }
             }
             else {
                 // Initializer is an expression. Emit the expression in the body, so that it's
                 // evaluated on every iteration.
-                var assignment = ts.createAssignment(initializer, ts.createElementAccess(rhsReference, counter));
+                var assignment = ts.createAssignment(node.initializer, boundValue);
                 if (ts.isDestructuringAssignment(assignment)) {
-                    // This is a destructuring pattern, so we flatten the destructuring instead.
-                    statements.push(ts.createStatement(ts.flattenDestructuringAssignment(context, assignment, 
-                    /*needsValue*/ false, hoistVariableDeclaration, visitor)));
+                    ts.aggregateTransformFlags(assignment);
+                    statements.push(ts.createStatement(visitBinaryExpression(assignment, /*needsDestructuringValue*/ false)));
                 }
                 else {
-                    // Currently there is not way to check that assignment is binary expression of destructing assignment
-                    // so we have to cast never type to binaryExpression
-                    assignment.end = initializer.end;
-                    statements.push(ts.createStatement(assignment, /*location*/ ts.moveRangeEnd(initializer, -1)));
+                    assignment.end = node.initializer.end;
+                    statements.push(ts.setTextRange(ts.createStatement(ts.visitNode(assignment, visitor, ts.isExpression)), ts.moveRangeEnd(node.initializer, -1)));
                 }
             }
             var bodyLocation;
@@ -50078,7 +60361,7 @@ var ts;
                 ts.addRange(statements, convertedLoopBodyStatements);
             }
             else {
-                var statement = ts.visitNode(node.statement, visitor, ts.isStatement);
+                var statement = ts.visitNode(node.statement, visitor, ts.isStatement, ts.liftToBlock);
                 if (ts.isBlock(statement)) {
                     ts.addRange(statements, statement.statements);
                     bodyLocation = statement;
@@ -50088,22 +60371,92 @@ var ts;
                     statements.push(statement);
                 }
             }
-            // The old emitter does not emit source maps for the expression
-            ts.setEmitFlags(expression, 1536 /* NoSourceMap */ | ts.getEmitFlags(expression));
             // The old emitter does not emit source maps for the block.
             // We add the location to preserve comments.
-            var body = ts.createBlock(ts.createNodeArray(statements, /*location*/ statementsLocation), 
-            /*location*/ bodyLocation);
-            ts.setEmitFlags(body, 1536 /* NoSourceMap */ | 12288 /* NoTokenSourceMaps */);
-            var forStatement = ts.createFor(ts.createVariableDeclarationList([
-                ts.createVariableDeclaration(counter, /*type*/ undefined, ts.createLiteral(0), /*location*/ ts.moveRangePos(node.expression, -1)),
-                ts.createVariableDeclaration(rhsReference, /*type*/ undefined, expression, /*location*/ node.expression)
-            ], /*location*/ node.expression), ts.createLessThan(counter, ts.createPropertyAccess(rhsReference, "length"), 
-            /*location*/ node.expression), ts.createPostfixIncrement(counter, /*location*/ node.expression), body, 
+            return ts.setEmitFlags(ts.setTextRange(ts.createBlock(ts.setTextRange(ts.createNodeArray(statements), statementsLocation), 
+            /*multiLine*/ true), bodyLocation), 48 /* NoSourceMap */ | 384 /* NoTokenSourceMaps */);
+        }
+        function convertForOfStatementForArray(node, outermostLabeledStatement, convertedLoopBodyStatements) {
+            // The following ES6 code:
+            //
+            //    for (let v of expr) { }
+            //
+            // should be emitted as
+            //
+            //    for (var _i = 0, _a = expr; _i < _a.length; _i++) {
+            //        var v = _a[_i];
+            //    }
+            //
+            // where _a and _i are temps emitted to capture the RHS and the counter,
+            // respectively.
+            // When the left hand side is an expression instead of a let declaration,
+            // the "let v" is not emitted.
+            // When the left hand side is a let/const, the v is renamed if there is
+            // another v in scope.
+            // Note that all assignments to the LHS are emitted in the body, including
+            // all destructuring.
+            // Note also that because an extra statement is needed to assign to the LHS,
+            // for-of bodies are always emitted as blocks.
+            var expression = ts.visitNode(node.expression, visitor, ts.isExpression);
+            // In the case where the user wrote an identifier as the RHS, like this:
+            //
+            //     for (let v of arr) { }
+            //
+            // we don't want to emit a temporary variable for the RHS, just use it directly.
+            var counter = ts.createLoopVariable();
+            var rhsReference = ts.isIdentifier(expression) ? ts.getGeneratedNameForNode(expression) : ts.createTempVariable(/*recordTempVariable*/ undefined);
+            // The old emitter does not emit source maps for the expression
+            ts.setEmitFlags(expression, 48 /* NoSourceMap */ | ts.getEmitFlags(expression));
+            var forStatement = ts.setTextRange(ts.createFor(
+            /*initializer*/ ts.setEmitFlags(ts.setTextRange(ts.createVariableDeclarationList([
+                ts.setTextRange(ts.createVariableDeclaration(counter, /*type*/ undefined, ts.createLiteral(0)), ts.moveRangePos(node.expression, -1)),
+                ts.setTextRange(ts.createVariableDeclaration(rhsReference, /*type*/ undefined, expression), node.expression)
+            ]), node.expression), 2097152 /* NoHoisting */), 
+            /*condition*/ ts.setTextRange(ts.createLessThan(counter, ts.createPropertyAccess(rhsReference, "length")), node.expression), 
+            /*incrementor*/ ts.setTextRange(ts.createPostfixIncrement(counter), node.expression), 
+            /*statement*/ convertForOfStatementHead(node, ts.createElementAccess(rhsReference, counter), convertedLoopBodyStatements)), 
             /*location*/ node);
             // Disable trailing source maps for the OpenParenToken to align source map emit with the old emitter.
-            ts.setEmitFlags(forStatement, 8192 /* NoTokenTrailingSourceMaps */);
-            return forStatement;
+            ts.setEmitFlags(forStatement, 256 /* NoTokenTrailingSourceMaps */);
+            ts.setTextRange(forStatement, node);
+            return ts.restoreEnclosingLabel(forStatement, outermostLabeledStatement, convertedLoopState && resetLabel);
+        }
+        function convertForOfStatementForIterable(node, outermostLabeledStatement, convertedLoopBodyStatements) {
+            var expression = ts.visitNode(node.expression, visitor, ts.isExpression);
+            var iterator = ts.isIdentifier(expression) ? ts.getGeneratedNameForNode(expression) : ts.createTempVariable(/*recordTempVariable*/ undefined);
+            var result = ts.isIdentifier(expression) ? ts.getGeneratedNameForNode(iterator) : ts.createTempVariable(/*recordTempVariable*/ undefined);
+            var errorRecord = ts.createUniqueName("e");
+            var catchVariable = ts.getGeneratedNameForNode(errorRecord);
+            var returnMethod = ts.createTempVariable(/*recordTempVariable*/ undefined);
+            var values = ts.createValuesHelper(context, expression, node.expression);
+            var next = ts.createCall(ts.createPropertyAccess(iterator, "next"), /*typeArguments*/ undefined, []);
+            hoistVariableDeclaration(errorRecord);
+            hoistVariableDeclaration(returnMethod);
+            var forStatement = ts.setEmitFlags(ts.setTextRange(ts.createFor(
+            /*initializer*/ ts.setEmitFlags(ts.setTextRange(ts.createVariableDeclarationList([
+                ts.setTextRange(ts.createVariableDeclaration(iterator, /*type*/ undefined, values), node.expression),
+                ts.createVariableDeclaration(result, /*type*/ undefined, next)
+            ]), node.expression), 2097152 /* NoHoisting */), 
+            /*condition*/ ts.createLogicalNot(ts.createPropertyAccess(result, "done")), 
+            /*incrementor*/ ts.createAssignment(result, next), 
+            /*statement*/ convertForOfStatementHead(node, ts.createPropertyAccess(result, "value"), convertedLoopBodyStatements)), 
+            /*location*/ node), 256 /* NoTokenTrailingSourceMaps */);
+            return ts.createTry(ts.createBlock([
+                ts.restoreEnclosingLabel(forStatement, outermostLabeledStatement, convertedLoopState && resetLabel)
+            ]), ts.createCatchClause(ts.createVariableDeclaration(catchVariable), ts.setEmitFlags(ts.createBlock([
+                ts.createStatement(ts.createAssignment(errorRecord, ts.createObjectLiteral([
+                    ts.createPropertyAssignment("error", catchVariable)
+                ])))
+            ]), 1 /* SingleLine */)), ts.createBlock([
+                ts.createTry(
+                /*tryBlock*/ ts.createBlock([
+                    ts.setEmitFlags(ts.createIf(ts.createLogicalAnd(ts.createLogicalAnd(result, ts.createLogicalNot(ts.createPropertyAccess(result, "done"))), ts.createAssignment(returnMethod, ts.createPropertyAccess(iterator, "return"))), ts.createStatement(ts.createFunctionCall(returnMethod, iterator, []))), 1 /* SingleLine */),
+                ]), 
+                /*catchClause*/ undefined, 
+                /*finallyBlock*/ ts.setEmitFlags(ts.createBlock([
+                    ts.setEmitFlags(ts.createIf(errorRecord, ts.createThrow(ts.createPropertyAccess(errorRecord, "error"))), 1 /* SingleLine */)
+                ]), 1 /* SingleLine */))
+            ]));
         }
         /**
          * Visits an ObjectLiteralExpression with computed propety names.
@@ -50117,31 +60470,39 @@ var ts;
             // Find the first computed property.
             // Everything until that point can be emitted as part of the initial object literal.
             var numInitialProperties = numProperties;
+            var numInitialPropertiesWithoutYield = numProperties;
             for (var i = 0; i < numProperties; i++) {
                 var property = properties[i];
-                if (property.transformFlags & 4194304 /* ContainsYield */
-                    || property.name.kind === 140 /* ComputedPropertyName */) {
+                if ((property.transformFlags & 16777216 /* ContainsYield */ && hierarchyFacts & 4 /* AsyncFunctionBody */)
+                    && i < numInitialPropertiesWithoutYield) {
+                    numInitialPropertiesWithoutYield = i;
+                }
+                if (property.name.kind === 144 /* ComputedPropertyName */) {
                     numInitialProperties = i;
                     break;
                 }
             }
-            ts.Debug.assert(numInitialProperties !== numProperties);
-            // For computed properties, we need to create a unique handle to the object
-            // literal so we can modify it without risking internal assignments tainting the object.
-            var temp = ts.createTempVariable(hoistVariableDeclaration);
-            // Write out the first non-computed properties, then emit the rest through indexing on the temp variable.
-            var expressions = [];
-            var assignment = ts.createAssignment(temp, ts.setEmitFlags(ts.createObjectLiteral(ts.visitNodes(properties, visitor, ts.isObjectLiteralElementLike, 0, numInitialProperties), 
-            /*location*/ undefined, node.multiLine), 524288 /* Indented */));
-            if (node.multiLine) {
-                assignment.startsOnNewLine = true;
-            }
-            expressions.push(assignment);
-            addObjectLiteralMembers(expressions, node, temp, numInitialProperties);
-            // We need to clone the temporary identifier so that we can write it on a
-            // new line
-            expressions.push(node.multiLine ? ts.startOnNewLine(ts.getMutableClone(temp)) : temp);
-            return ts.inlineExpressions(expressions);
+            if (numInitialProperties !== numProperties) {
+                if (numInitialPropertiesWithoutYield < numInitialProperties) {
+                    numInitialProperties = numInitialPropertiesWithoutYield;
+                }
+                // For computed properties, we need to create a unique handle to the object
+                // literal so we can modify it without risking internal assignments tainting the object.
+                var temp = ts.createTempVariable(hoistVariableDeclaration);
+                // Write out the first non-computed properties, then emit the rest through indexing on the temp variable.
+                var expressions = [];
+                var assignment = ts.createAssignment(temp, ts.setEmitFlags(ts.createObjectLiteral(ts.visitNodes(properties, visitor, ts.isObjectLiteralElementLike, 0, numInitialProperties), node.multiLine), 65536 /* Indented */));
+                if (node.multiLine) {
+                    assignment.startsOnNewLine = true;
+                }
+                expressions.push(assignment);
+                addObjectLiteralMembers(expressions, node, temp, numInitialProperties);
+                // We need to clone the temporary identifier so that we can write it on a
+                // new line
+                expressions.push(node.multiLine ? ts.startOnNewLine(ts.getMutableClone(temp)) : temp);
+                return ts.inlineExpressions(expressions);
+            }
+            return ts.visitEachChild(node, visitor, context);
         }
         function shouldConvertIterationStatementBody(node) {
             return (resolver.getNodeCheckFlags(node) & 65536 /* LoopWithCapturedBlockScopedBinding */) !== 0;
@@ -50155,7 +60516,7 @@ var ts;
             }
             visit(node.name);
             function visit(node) {
-                if (node.kind === 69 /* Identifier */) {
+                if (node.kind === 71 /* Identifier */) {
                     state.hoistedLocalVariables.push(node);
                 }
                 else {
@@ -50168,7 +60529,7 @@ var ts;
                 }
             }
         }
-        function convertIterationStatementBodyIfNecessary(node, convert) {
+        function convertIterationStatementBodyIfNecessary(node, outermostLabeledStatement, convert) {
             if (!shouldConvertIterationStatementBody(node)) {
                 var saveAllowedNonLabeledJumps = void 0;
                 if (convertedLoopState) {
@@ -50177,7 +60538,9 @@ var ts;
                     saveAllowedNonLabeledJumps = convertedLoopState.allowedNonLabeledJumps;
                     convertedLoopState.allowedNonLabeledJumps = 2 /* Break */ | 4 /* Continue */;
                 }
-                var result = convert ? convert(node, /*convertedLoopBodyStatements*/ undefined) : ts.visitEachChild(node, visitor, context);
+                var result = convert
+                    ? convert(node, outermostLabeledStatement, /*convertedLoopBodyStatements*/ undefined)
+                    : ts.restoreEnclosingLabel(ts.visitEachChild(node, visitor, context), outermostLabeledStatement, convertedLoopState && resetLabel);
                 if (convertedLoopState) {
                     convertedLoopState.allowedNonLabeledJumps = saveAllowedNonLabeledJumps;
                 }
@@ -50186,11 +60549,11 @@ var ts;
             var functionName = ts.createUniqueName("_loop");
             var loopInitializer;
             switch (node.kind) {
-                case 206 /* ForStatement */:
-                case 207 /* ForInStatement */:
-                case 208 /* ForOfStatement */:
+                case 214 /* ForStatement */:
+                case 215 /* ForInStatement */:
+                case 216 /* ForOfStatement */:
                     var initializer = node.initializer;
-                    if (initializer && initializer.kind === 219 /* VariableDeclarationList */) {
+                    if (initializer && initializer.kind === 227 /* VariableDeclarationList */) {
                         loopInitializer = initializer;
                     }
                     break;
@@ -50226,35 +60589,43 @@ var ts;
                     convertedLoopState.hoistedLocalVariables = outerConvertedLoopState.hoistedLocalVariables;
                 }
             }
-            var loopBody = ts.visitNode(node.statement, visitor, ts.isStatement);
+            startLexicalEnvironment();
+            var loopBody = ts.visitNode(node.statement, visitor, ts.isStatement, ts.liftToBlock);
+            var lexicalEnvironment = endLexicalEnvironment();
             var currentState = convertedLoopState;
             convertedLoopState = outerConvertedLoopState;
-            if (loopOutParameters.length) {
-                var statements_3 = ts.isBlock(loopBody) ? loopBody.statements.slice() : [loopBody];
-                copyOutParameters(loopOutParameters, 1 /* ToOutParameter */, statements_3);
-                loopBody = ts.createBlock(statements_3, /*location*/ undefined, /*multiline*/ true);
+            if (loopOutParameters.length || lexicalEnvironment) {
+                var statements_4 = ts.isBlock(loopBody) ? loopBody.statements.slice() : [loopBody];
+                if (loopOutParameters.length) {
+                    copyOutParameters(loopOutParameters, 1 /* ToOutParameter */, statements_4);
+                }
+                ts.addRange(statements_4, lexicalEnvironment);
+                loopBody = ts.createBlock(statements_4, /*multiline*/ true);
+            }
+            if (ts.isBlock(loopBody)) {
+                loopBody.multiLine = true;
             }
-            if (!ts.isBlock(loopBody)) {
-                loopBody = ts.createBlock([loopBody], /*location*/ undefined, /*multiline*/ true);
+            else {
+                loopBody = ts.createBlock([loopBody], /*multiline*/ true);
             }
-            var isAsyncBlockContainingAwait = enclosingNonArrowFunction
-                && (ts.getEmitFlags(enclosingNonArrowFunction) & 2097152 /* AsyncFunctionBody */) !== 0
-                && (node.statement.transformFlags & 4194304 /* ContainsYield */) !== 0;
+            var containsYield = (node.statement.transformFlags & 16777216 /* ContainsYield */) !== 0;
+            var isAsyncBlockContainingAwait = containsYield && (hierarchyFacts & 4 /* AsyncFunctionBody */) !== 0;
             var loopBodyFlags = 0;
             if (currentState.containsLexicalThis) {
-                loopBodyFlags |= 256 /* CapturesThis */;
+                loopBodyFlags |= 8 /* CapturesThis */;
             }
             if (isAsyncBlockContainingAwait) {
-                loopBodyFlags |= 2097152 /* AsyncFunctionBody */;
+                loopBodyFlags |= 262144 /* AsyncFunctionBody */;
             }
             var convertedLoopVariable = ts.createVariableStatement(
-            /*modifiers*/ undefined, ts.createVariableDeclarationList([
+            /*modifiers*/ undefined, ts.setEmitFlags(ts.createVariableDeclarationList([
                 ts.createVariableDeclaration(functionName, 
-                /*type*/ undefined, ts.setEmitFlags(ts.createFunctionExpression(isAsyncBlockContainingAwait ? ts.createToken(37 /* AsteriskToken */) : undefined, 
+                /*type*/ undefined, ts.setEmitFlags(ts.createFunctionExpression(
+                /*modifiers*/ undefined, containsYield ? ts.createToken(39 /* AsteriskToken */) : undefined, 
                 /*name*/ undefined, 
                 /*typeParameters*/ undefined, loopParameters, 
                 /*type*/ undefined, loopBody), loopBodyFlags))
-            ]));
+            ]), 2097152 /* NoHoisting */));
             var statements = [convertedLoopVariable];
             var extraVariableDeclarations;
             // propagate state from the inner loop to the outer loop if necessary
@@ -50296,8 +60667,8 @@ var ts;
                         extraVariableDeclarations = [];
                     }
                     // hoist collected variable declarations
-                    for (var name_36 in currentState.hoistedLocalVariables) {
-                        var identifier = currentState.hoistedLocalVariables[name_36];
+                    for (var _b = 0, _c = currentState.hoistedLocalVariables; _b < _c.length; _b++) {
+                        var identifier = _c[_b];
                         extraVariableDeclarations.push(ts.createVariableDeclaration(identifier));
                     }
                 }
@@ -50307,8 +60678,8 @@ var ts;
                 if (!extraVariableDeclarations) {
                     extraVariableDeclarations = [];
                 }
-                for (var _b = 0, loopOutParameters_1 = loopOutParameters; _b < loopOutParameters_1.length; _b++) {
-                    var outParam = loopOutParameters_1[_b];
+                for (var _d = 0, loopOutParameters_1 = loopOutParameters; _d < loopOutParameters_1.length; _d++) {
+                    var outParam = loopOutParameters_1[_d];
                     extraVariableDeclarations.push(ts.createVariableDeclaration(outParam.outParamName));
                 }
             }
@@ -50317,34 +60688,31 @@ var ts;
                 statements.push(ts.createVariableStatement(
                 /*modifiers*/ undefined, ts.createVariableDeclarationList(extraVariableDeclarations)));
             }
-            var convertedLoopBodyStatements = generateCallToConvertedLoop(functionName, loopParameters, currentState, isAsyncBlockContainingAwait);
+            var convertedLoopBodyStatements = generateCallToConvertedLoop(functionName, loopParameters, currentState, containsYield);
             var loop;
             if (convert) {
-                loop = convert(node, convertedLoopBodyStatements);
+                loop = convert(node, outermostLabeledStatement, convertedLoopBodyStatements);
             }
             else {
-                loop = ts.getMutableClone(node);
+                var clone_3 = ts.getMutableClone(node);
                 // clean statement part
-                loop.statement = undefined;
+                clone_3.statement = undefined;
                 // visit childnodes to transform initializer/condition/incrementor parts
-                loop = ts.visitEachChild(loop, visitor, context);
+                clone_3 = ts.visitEachChild(clone_3, visitor, context);
                 // set loop statement
-                loop.statement = ts.createBlock(convertedLoopBodyStatements, 
-                /*location*/ undefined, 
-                /*multiline*/ true);
+                clone_3.statement = ts.createBlock(convertedLoopBodyStatements, /*multiline*/ true);
                 // reset and re-aggregate the transform flags
-                loop.transformFlags = 0;
-                ts.aggregateTransformFlags(loop);
+                clone_3.transformFlags = 0;
+                ts.aggregateTransformFlags(clone_3);
+                loop = ts.restoreEnclosingLabel(clone_3, outermostLabeledStatement, convertedLoopState && resetLabel);
             }
-            statements.push(currentParent.kind === 214 /* LabeledStatement */
-                ? ts.createLabel(currentParent.label, loop)
-                : loop);
+            statements.push(loop);
             return statements;
         }
         function copyOutParameter(outParam, copyDirection) {
             var source = copyDirection === 0 /* ToOriginal */ ? outParam.outParamName : outParam.originalName;
             var target = copyDirection === 0 /* ToOriginal */ ? outParam.originalName : outParam.outParamName;
-            return ts.createBinary(target, 56 /* EqualsToken */, source);
+            return ts.createBinary(target, 58 /* EqualsToken */, source);
         }
         function copyOutParameters(outParams, copyDirection, statements) {
             for (var _i = 0, outParams_1 = outParams; _i < outParams_1.length; _i++) {
@@ -50362,7 +60730,9 @@ var ts;
                 !state.labeledNonLocalBreaks &&
                 !state.labeledNonLocalContinues;
             var call = ts.createCall(loopFunctionExpressionName, /*typeArguments*/ undefined, ts.map(parameters, function (p) { return p.name; }));
-            var callResult = isAsyncBlockContainingAwait ? ts.createYield(ts.createToken(37 /* AsteriskToken */), call) : call;
+            var callResult = isAsyncBlockContainingAwait
+                ? ts.createYield(ts.createToken(39 /* AsteriskToken */), ts.setEmitFlags(call, 8388608 /* Iterator */))
+                : call;
             if (isSimpleLoop) {
                 statements.push(ts.createStatement(callResult));
                 copyOutParameters(state.loopOutParameters, 0 /* ToOriginal */, statements);
@@ -50382,10 +60752,10 @@ var ts;
                     else {
                         returnStatement = ts.createReturn(ts.createPropertyAccess(loopResultName, "value"));
                     }
-                    statements.push(ts.createIf(ts.createBinary(ts.createTypeOf(loopResultName), 32 /* EqualsEqualsEqualsToken */, ts.createLiteral("object")), returnStatement));
+                    statements.push(ts.createIf(ts.createBinary(ts.createTypeOf(loopResultName), 34 /* EqualsEqualsEqualsToken */, ts.createLiteral("object")), returnStatement));
                 }
                 if (state.nonLocalJumps & 2 /* Break */) {
-                    statements.push(ts.createIf(ts.createBinary(loopResultName, 32 /* EqualsEqualsEqualsToken */, ts.createLiteral("break")), ts.createBreak()));
+                    statements.push(ts.createIf(ts.createBinary(loopResultName, 34 /* EqualsEqualsEqualsToken */, ts.createLiteral("break")), ts.createBreak()));
                 }
                 if (state.labeledNonLocalBreaks || state.labeledNonLocalContinues) {
                     var caseClauses = [];
@@ -50401,26 +60771,25 @@ var ts;
                 if (!state.labeledNonLocalBreaks) {
                     state.labeledNonLocalBreaks = ts.createMap();
                 }
-                state.labeledNonLocalBreaks[labelText] = labelMarker;
+                state.labeledNonLocalBreaks.set(labelText, labelMarker);
             }
             else {
                 if (!state.labeledNonLocalContinues) {
                     state.labeledNonLocalContinues = ts.createMap();
                 }
-                state.labeledNonLocalContinues[labelText] = labelMarker;
+                state.labeledNonLocalContinues.set(labelText, labelMarker);
             }
         }
         function processLabeledJumps(table, isBreak, loopResultName, outerLoop, caseClauses) {
             if (!table) {
                 return;
             }
-            for (var labelText in table) {
-                var labelMarker = table[labelText];
+            table.forEach(function (labelMarker, labelText) {
                 var statements = [];
                 // if there are no outer converted loop or outer label in question is located inside outer converted loop
                 // then emit labeled break\continue
                 // otherwise propagate pair 'label -> marker' to outer converted loop and emit 'return labelMarker' so outer loop can later decide what to do
-                if (!outerLoop || (outerLoop.labels && outerLoop.labels[labelText])) {
+                if (!outerLoop || (outerLoop.labels && outerLoop.labels.get(labelText))) {
                     var label = ts.createIdentifier(labelText);
                     statements.push(isBreak ? ts.createBreak(label) : ts.createContinue(label));
                 }
@@ -50429,7 +60798,7 @@ var ts;
                     statements.push(ts.createReturn(loopResultName));
                 }
                 caseClauses.push(ts.createCaseClause(ts.createLiteral(labelMarker), statements));
-            }
+            });
         }
         function processLoopVariableDeclaration(decl, loopParameters, loopOutParameters) {
             var name = decl.name;
@@ -50442,9 +60811,9 @@ var ts;
                 }
             }
             else {
-                loopParameters.push(ts.createParameter(name));
+                loopParameters.push(ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, name));
                 if (resolver.getNodeCheckFlags(decl) & 2097152 /* NeedsLoopOutParameter */) {
-                    var outParamName = ts.createUniqueName("out_" + name.text);
+                    var outParamName = ts.createUniqueName("out_" + ts.unescapeIdentifier(name.text));
                     loopOutParameters.push({ originalName: name, outParamName: outParamName });
                 }
             }
@@ -50464,21 +60833,21 @@ var ts;
             for (var i = start; i < numProperties; i++) {
                 var property = properties[i];
                 switch (property.kind) {
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
+                    case 153 /* GetAccessor */:
+                    case 154 /* SetAccessor */:
                         var accessors = ts.getAllAccessorDeclarations(node.properties, property);
                         if (property === accessors.firstAccessor) {
-                            expressions.push(transformAccessorsToExpression(receiver, accessors, node.multiLine));
+                            expressions.push(transformAccessorsToExpression(receiver, accessors, node, node.multiLine));
                         }
                         break;
-                    case 253 /* PropertyAssignment */:
-                        expressions.push(transformPropertyAssignmentToExpression(node, property, receiver, node.multiLine));
+                    case 151 /* MethodDeclaration */:
+                        expressions.push(transformObjectLiteralMethodDeclarationToExpression(property, receiver, node, node.multiLine));
                         break;
-                    case 254 /* ShorthandPropertyAssignment */:
-                        expressions.push(transformShorthandPropertyAssignmentToExpression(node, property, receiver, node.multiLine));
+                    case 261 /* PropertyAssignment */:
+                        expressions.push(transformPropertyAssignmentToExpression(property, receiver, node.multiLine));
                         break;
-                    case 147 /* MethodDeclaration */:
-                        expressions.push(transformObjectLiteralMethodDeclarationToExpression(node, property, receiver, node.multiLine));
+                    case 262 /* ShorthandPropertyAssignment */:
+                        expressions.push(transformShorthandPropertyAssignmentToExpression(property, receiver, node.multiLine));
                         break;
                     default:
                         ts.Debug.failBadSyntaxKind(node);
@@ -50493,9 +60862,9 @@ var ts;
          * @param property The PropertyAssignment node.
          * @param receiver The receiver for the assignment.
          */
-        function transformPropertyAssignmentToExpression(node, property, receiver, startsOnNewLine) {
-            var expression = ts.createAssignment(ts.createMemberAccessForPropertyName(receiver, ts.visitNode(property.name, visitor, ts.isPropertyName)), ts.visitNode(property.initializer, visitor, ts.isExpression), 
-            /*location*/ property);
+        function transformPropertyAssignmentToExpression(property, receiver, startsOnNewLine) {
+            var expression = ts.createAssignment(ts.createMemberAccessForPropertyName(receiver, ts.visitNode(property.name, visitor, ts.isPropertyName)), ts.visitNode(property.initializer, visitor, ts.isExpression));
+            ts.setTextRange(expression, property);
             if (startsOnNewLine) {
                 expression.startsOnNewLine = true;
             }
@@ -50508,9 +60877,9 @@ var ts;
          * @param property The ShorthandPropertyAssignment node.
          * @param receiver The receiver for the assignment.
          */
-        function transformShorthandPropertyAssignmentToExpression(node, property, receiver, startsOnNewLine) {
-            var expression = ts.createAssignment(ts.createMemberAccessForPropertyName(receiver, ts.visitNode(property.name, visitor, ts.isPropertyName)), ts.getSynthesizedClone(property.name), 
-            /*location*/ property);
+        function transformShorthandPropertyAssignmentToExpression(property, receiver, startsOnNewLine) {
+            var expression = ts.createAssignment(ts.createMemberAccessForPropertyName(receiver, ts.visitNode(property.name, visitor, ts.isPropertyName)), ts.getSynthesizedClone(property.name));
+            ts.setTextRange(expression, property);
             if (startsOnNewLine) {
                 expression.startsOnNewLine = true;
             }
@@ -50523,14 +60892,39 @@ var ts;
          * @param method The MethodDeclaration node.
          * @param receiver The receiver for the assignment.
          */
-        function transformObjectLiteralMethodDeclarationToExpression(node, method, receiver, startsOnNewLine) {
-            var expression = ts.createAssignment(ts.createMemberAccessForPropertyName(receiver, ts.visitNode(method.name, visitor, ts.isPropertyName)), transformFunctionLikeToExpression(method, /*location*/ method, /*name*/ undefined), 
-            /*location*/ method);
+        function transformObjectLiteralMethodDeclarationToExpression(method, receiver, container, startsOnNewLine) {
+            var ancestorFacts = enterSubtree(0 /* None */, 0 /* None */);
+            var expression = ts.createAssignment(ts.createMemberAccessForPropertyName(receiver, ts.visitNode(method.name, visitor, ts.isPropertyName)), transformFunctionLikeToExpression(method, /*location*/ method, /*name*/ undefined, container));
+            ts.setTextRange(expression, method);
             if (startsOnNewLine) {
                 expression.startsOnNewLine = true;
             }
+            exitSubtree(ancestorFacts, 49152 /* PropagateNewTargetMask */, hierarchyFacts & 49152 /* PropagateNewTargetMask */ ? 16384 /* NewTarget */ : 0 /* None */);
             return expression;
         }
+        function visitCatchClause(node) {
+            var ancestorFacts = enterSubtree(4032 /* BlockScopeExcludes */, 0 /* BlockScopeIncludes */);
+            var updated;
+            if (ts.isBindingPattern(node.variableDeclaration.name)) {
+                var temp = ts.createTempVariable(/*recordTempVariable*/ undefined);
+                var newVariableDeclaration = ts.createVariableDeclaration(temp);
+                ts.setTextRange(newVariableDeclaration, node.variableDeclaration);
+                var vars = ts.flattenDestructuringBinding(node.variableDeclaration, visitor, context, 0 /* All */, temp);
+                var list = ts.createVariableDeclarationList(vars);
+                ts.setTextRange(list, node.variableDeclaration);
+                var destructure = ts.createVariableStatement(/*modifiers*/ undefined, list);
+                updated = ts.updateCatchClause(node, newVariableDeclaration, addStatementToStartOfBlock(node.block, destructure));
+            }
+            else {
+                updated = ts.visitEachChild(node, visitor, context);
+            }
+            exitSubtree(ancestorFacts, 0 /* None */, 0 /* None */);
+            return updated;
+        }
+        function addStatementToStartOfBlock(block, statement) {
+            var transformedStatements = ts.visitNodes(block.statements, visitor, ts.isStatement);
+            return ts.updateBlock(block, [statement].concat(transformedStatements));
+        }
         /**
          * Visits a MethodDeclaration of an ObjectLiteralExpression and transforms it into a
          * PropertyAssignment.
@@ -50542,20 +60936,54 @@ var ts;
             // Methods on classes are handled in visitClassDeclaration/visitClassExpression.
             // Methods with computed property names are handled in visitObjectLiteralExpression.
             ts.Debug.assert(!ts.isComputedPropertyName(node.name));
-            var functionExpression = transformFunctionLikeToExpression(node, /*location*/ ts.moveRangePos(node, -1), /*name*/ undefined);
-            ts.setEmitFlags(functionExpression, 16384 /* NoLeadingComments */ | ts.getEmitFlags(functionExpression));
-            return ts.createPropertyAssignment(node.name, functionExpression, 
+            var functionExpression = transformFunctionLikeToExpression(node, /*location*/ ts.moveRangePos(node, -1), /*name*/ undefined, /*container*/ undefined);
+            ts.setEmitFlags(functionExpression, 512 /* NoLeadingComments */ | ts.getEmitFlags(functionExpression));
+            return ts.setTextRange(ts.createPropertyAssignment(node.name, functionExpression), 
             /*location*/ node);
         }
+        /**
+         * Visits an AccessorDeclaration of an ObjectLiteralExpression.
+         *
+         * @param node An AccessorDeclaration node.
+         */
+        function visitAccessorDeclaration(node) {
+            ts.Debug.assert(!ts.isComputedPropertyName(node.name));
+            var savedConvertedLoopState = convertedLoopState;
+            convertedLoopState = undefined;
+            var ancestorFacts = enterSubtree(16286 /* FunctionExcludes */, 65 /* FunctionIncludes */);
+            var updated;
+            if (node.transformFlags & 32768 /* ContainsCapturedLexicalThis */) {
+                var parameters = ts.visitParameterList(node.parameters, visitor, context);
+                var body = transformFunctionBody(node);
+                if (node.kind === 153 /* GetAccessor */) {
+                    updated = ts.updateGetAccessor(node, node.decorators, node.modifiers, node.name, parameters, node.type, body);
+                }
+                else {
+                    updated = ts.updateSetAccessor(node, node.decorators, node.modifiers, node.name, parameters, body);
+                }
+            }
+            else {
+                updated = ts.visitEachChild(node, visitor, context);
+            }
+            exitSubtree(ancestorFacts, 49152 /* PropagateNewTargetMask */, 0 /* None */);
+            convertedLoopState = savedConvertedLoopState;
+            return updated;
+        }
         /**
          * Visits a ShorthandPropertyAssignment and transforms it into a PropertyAssignment.
          *
          * @param node A ShorthandPropertyAssignment node.
          */
         function visitShorthandPropertyAssignment(node) {
-            return ts.createPropertyAssignment(node.name, ts.getSynthesizedClone(node.name), 
+            return ts.setTextRange(ts.createPropertyAssignment(node.name, ts.getSynthesizedClone(node.name)), 
             /*location*/ node);
         }
+        function visitComputedPropertyName(node) {
+            var ancestorFacts = enterSubtree(0 /* ComputedPropertyNameExcludes */, 8192 /* ComputedPropertyNameIncludes */);
+            var updated = ts.visitEachChild(node, visitor, context);
+            exitSubtree(ancestorFacts, 49152 /* PropagateNewTargetMask */, hierarchyFacts & 49152 /* PropagateNewTargetMask */ ? 32768 /* NewTargetInComputedPropertyName */ : 0 /* None */);
+            return updated;
+        }
         /**
          * Visits a YieldExpression node.
          *
@@ -50571,8 +60999,11 @@ var ts;
          * @param node An ArrayLiteralExpression node.
          */
         function visitArrayLiteralExpression(node) {
-            // We are here because we contain a SpreadElementExpression.
-            return transformAndSpreadElements(node.elements, /*needsUniqueCopy*/ true, node.multiLine, /*hasTrailingComma*/ node.elements.hasTrailingComma);
+            if (node.transformFlags & 64 /* ES2015 */) {
+                // We are here because we contain a SpreadElementExpression.
+                return transformAndSpreadElements(node.elements, /*needsUniqueCopy*/ true, node.multiLine, /*hasTrailingComma*/ node.elements.hasTrailingComma);
+            }
+            return ts.visitEachChild(node, visitor, context);
         }
         /**
          * Visits a CallExpression that contains either a spread element or `super`.
@@ -50580,7 +61011,121 @@ var ts;
          * @param node a CallExpression.
          */
         function visitCallExpression(node) {
-            return visitCallExpressionWithPotentialCapturedThisAssignment(node, /*assignToCapturedThis*/ true);
+            if (isTypeScriptClassWrapper(node)) {
+                return visitTypeScriptClassWrapper(node);
+            }
+            if (node.transformFlags & 64 /* ES2015 */) {
+                return visitCallExpressionWithPotentialCapturedThisAssignment(node, /*assignToCapturedThis*/ true);
+            }
+            return ts.updateCall(node, ts.visitNode(node.expression, callExpressionVisitor, ts.isExpression), 
+            /*typeArguments*/ undefined, ts.visitNodes(node.arguments, visitor, ts.isExpression));
+        }
+        function visitTypeScriptClassWrapper(node) {
+            // This is a call to a class wrapper function (an IIFE) created by the 'ts' transformer.
+            // The wrapper has a form similar to:
+            //
+            //  (function() {
+            //      class C { // 1
+            //      }
+            //      C.x = 1; // 2
+            //      return C;
+            //  }())
+            //
+            // When we transform the class, we end up with something like this:
+            //
+            //  (function () {
+            //      var C = (function () { // 3
+            //          function C() {
+            //          }
+            //          return C; // 4
+            //      }());
+            //      C.x = 1;
+            //      return C;
+            //  }())
+            //
+            // We want to simplify the two nested IIFEs to end up with something like this:
+            //
+            //  (function () {
+            //      function C() {
+            //      }
+            //      C.x = 1;
+            //      return C;
+            //  }())
+            // We skip any outer expressions in a number of places to get to the innermost
+            // expression, but we will restore them later to preserve comments and source maps.
+            var body = ts.cast(ts.skipOuterExpressions(node.expression), ts.isFunctionExpression).body;
+            // The class statements are the statements generated by visiting the first statement of the
+            // body (1), while all other statements are added to remainingStatements (2)
+            var classStatements = ts.visitNodes(body.statements, visitor, ts.isStatement, 0, 1);
+            var remainingStatements = ts.visitNodes(body.statements, visitor, ts.isStatement, 1, body.statements.length - 1);
+            var varStatement = ts.cast(ts.firstOrUndefined(classStatements), ts.isVariableStatement);
+            // We know there is only one variable declaration here as we verified this in an
+            // earlier call to isTypeScriptClassWrapper
+            var variable = varStatement.declarationList.declarations[0];
+            var initializer = ts.skipOuterExpressions(variable.initializer);
+            // Under certain conditions, the 'ts' transformer may introduce a class alias, which
+            // we see as an assignment, for example:
+            //
+            //  (function () {
+            //      var C = C_1 = (function () {
+            //          function C() {
+            //          }
+            //          C.x = function () { return C_1; }
+            //          return C;
+            //      }());
+            //      C = C_1 = __decorate([dec], C);
+            //      return C;
+            //      var C_1;
+            //  }())
+            //
+            var aliasAssignment = ts.tryCast(initializer, ts.isAssignmentExpression);
+            // The underlying call (3) is another IIFE that may contain a '_super' argument.
+            var call = ts.cast(aliasAssignment ? ts.skipOuterExpressions(aliasAssignment.right) : initializer, ts.isCallExpression);
+            var func = ts.cast(ts.skipOuterExpressions(call.expression), ts.isFunctionExpression);
+            var funcStatements = func.body.statements;
+            var classBodyStart = 0;
+            var classBodyEnd = -1;
+            var statements = [];
+            if (aliasAssignment) {
+                // If we have a class alias assignment, we need to move it to the down-level constructor
+                // function we generated for the class.
+                var extendsCall = ts.tryCast(funcStatements[classBodyStart], ts.isExpressionStatement);
+                if (extendsCall) {
+                    statements.push(extendsCall);
+                    classBodyStart++;
+                }
+                // The next statement is the function declaration.
+                statements.push(funcStatements[classBodyStart]);
+                classBodyStart++;
+                // Add the class alias following the declaration.
+                statements.push(ts.createStatement(ts.createAssignment(aliasAssignment.left, ts.cast(variable.name, ts.isIdentifier))));
+            }
+            // Find the trailing 'return' statement (4)
+            while (!ts.isReturnStatement(ts.elementAt(funcStatements, classBodyEnd))) {
+                classBodyEnd--;
+            }
+            // When we extract the statements of the inner IIFE, we exclude the 'return' statement (4)
+            // as we already have one that has been introduced by the 'ts' transformer.
+            ts.addRange(statements, funcStatements, classBodyStart, classBodyEnd);
+            if (classBodyEnd < -1) {
+                // If there were any hoisted declarations following the return statement, we should
+                // append them.
+                ts.addRange(statements, funcStatements, classBodyEnd + 1);
+            }
+            // Add the remaining statements of the outer wrapper.
+            ts.addRange(statements, remainingStatements);
+            // The 'es2015' class transform may add an end-of-declaration marker. If so we will add it
+            // after the remaining statements from the 'ts' transformer.
+            ts.addRange(statements, classStatements, /*start*/ 1);
+            // Recreate any outer parentheses or partially-emitted expressions to preserve source map
+            // and comment locations.
+            return ts.recreateOuterExpressions(node.expression, ts.recreateOuterExpressions(variable.initializer, ts.recreateOuterExpressions(aliasAssignment && aliasAssignment.right, ts.updateCall(call, ts.recreateOuterExpressions(call.expression, ts.updateFunctionExpression(func, 
+            /*modifiers*/ undefined, 
+            /*asteriskToken*/ undefined, 
+            /*name*/ undefined, 
+            /*typeParameters*/ undefined, func.parameters, 
+            /*type*/ undefined, ts.updateBlock(func.body, statements))), 
+            /*typeArguments*/ undefined, call.arguments))));
         }
         function visitImmediateSuperCallInBody(node) {
             return visitCallExpressionWithPotentialCapturedThisAssignment(node, /*assignToCapturedThis*/ false);
@@ -50589,11 +61134,11 @@ var ts;
             // We are here either because SuperKeyword was used somewhere in the expression, or
             // because we contain a SpreadElementExpression.
             var _a = ts.createCallBinding(node.expression, hoistVariableDeclaration), target = _a.target, thisArg = _a.thisArg;
-            if (node.expression.kind === 95 /* SuperKeyword */) {
-                ts.setEmitFlags(thisArg, 128 /* NoSubstitution */);
+            if (node.expression.kind === 97 /* SuperKeyword */) {
+                ts.setEmitFlags(thisArg, 4 /* NoSubstitution */);
             }
             var resultingCall;
-            if (node.transformFlags & 262144 /* ContainsSpreadElementExpression */) {
+            if (node.transformFlags & 524288 /* ContainsSpread */) {
                 // [source]
                 //      f(...a, b)
                 //      x.m(...a, b)
@@ -50607,7 +61152,7 @@ var ts;
                 //      _super.apply(this, a.concat([b]))
                 //      _super.m.apply(this, a.concat([b]))
                 //      _super.prototype.m.apply(this, a.concat([b]))
-                resultingCall = ts.createFunctionApply(ts.visitNode(target, visitor, ts.isExpression), ts.visitNode(thisArg, visitor, ts.isExpression), transformAndSpreadElements(node.arguments, /*needsUniqueCopy*/ false, /*multiLine*/ false, /*hasTrailingComma*/ false));
+                resultingCall = ts.createFunctionApply(ts.visitNode(target, callExpressionVisitor, ts.isExpression), ts.visitNode(thisArg, visitor, ts.isExpression), transformAndSpreadElements(node.arguments, /*needsUniqueCopy*/ false, /*multiLine*/ false, /*hasTrailingComma*/ false));
             }
             else {
                 // [source]
@@ -50619,18 +61164,18 @@ var ts;
                 //      _super.call(this, a)
                 //      _super.m.call(this, a)
                 //      _super.prototype.m.call(this, a)
-                resultingCall = ts.createFunctionCall(ts.visitNode(target, visitor, ts.isExpression), ts.visitNode(thisArg, visitor, ts.isExpression), ts.visitNodes(node.arguments, visitor, ts.isExpression), 
+                resultingCall = ts.createFunctionCall(ts.visitNode(target, callExpressionVisitor, ts.isExpression), ts.visitNode(thisArg, visitor, ts.isExpression), ts.visitNodes(node.arguments, visitor, ts.isExpression), 
                 /*location*/ node);
             }
-            if (node.expression.kind === 95 /* SuperKeyword */) {
+            if (node.expression.kind === 97 /* SuperKeyword */) {
                 var actualThis = ts.createThis();
-                ts.setEmitFlags(actualThis, 128 /* NoSubstitution */);
+                ts.setEmitFlags(actualThis, 4 /* NoSubstitution */);
                 var initializer = ts.createLogicalOr(resultingCall, actualThis);
-                return assignToCapturedThis
+                resultingCall = assignToCapturedThis
                     ? ts.createAssignment(ts.createIdentifier("_this"), initializer)
                     : initializer;
             }
-            return resultingCall;
+            return ts.setOriginalNode(resultingCall, node);
         }
         /**
          * Visits a NewExpression that contains a spread element.
@@ -50638,19 +61183,21 @@ var ts;
          * @param node A NewExpression node.
          */
         function visitNewExpression(node) {
-            // We are here because we contain a SpreadElementExpression.
-            ts.Debug.assert((node.transformFlags & 262144 /* ContainsSpreadElementExpression */) !== 0);
-            // [source]
-            //      new C(...a)
-            //
-            // [output]
-            //      new ((_a = C).bind.apply(_a, [void 0].concat(a)))()
-            var _a = ts.createCallBinding(ts.createPropertyAccess(node.expression, "bind"), hoistVariableDeclaration), target = _a.target, thisArg = _a.thisArg;
-            return ts.createNew(ts.createFunctionApply(ts.visitNode(target, visitor, ts.isExpression), thisArg, transformAndSpreadElements(ts.createNodeArray([ts.createVoidZero()].concat(node.arguments)), /*needsUniqueCopy*/ false, /*multiLine*/ false, /*hasTrailingComma*/ false)), 
-            /*typeArguments*/ undefined, []);
+            if (node.transformFlags & 524288 /* ContainsSpread */) {
+                // We are here because we contain a SpreadElementExpression.
+                // [source]
+                //      new C(...a)
+                //
+                // [output]
+                //      new ((_a = C).bind.apply(_a, [void 0].concat(a)))()
+                var _a = ts.createCallBinding(ts.createPropertyAccess(node.expression, "bind"), hoistVariableDeclaration), target = _a.target, thisArg = _a.thisArg;
+                return ts.createNew(ts.createFunctionApply(ts.visitNode(target, visitor, ts.isExpression), thisArg, transformAndSpreadElements(ts.createNodeArray([ts.createVoidZero()].concat(node.arguments)), /*needsUniqueCopy*/ false, /*multiLine*/ false, /*hasTrailingComma*/ false)), 
+                /*typeArguments*/ undefined, []);
+            }
+            return ts.visitEachChild(node, visitor, context);
         }
         /**
-         * Transforms an array of Expression nodes that contains a SpreadElementExpression.
+         * Transforms an array of Expression nodes that contains a SpreadExpression.
          *
          * @param elements The array of Expression nodes.
          * @param needsUniqueCopy A value indicating whether to ensure that the result is a fresh array.
@@ -50665,36 +61212,52 @@ var ts;
             // Map spans of spread expressions into their expressions and spans of other
             // expressions into an array literal.
             var numElements = elements.length;
-            var segments = ts.flatten(ts.spanMap(elements, partitionSpreadElement, function (partition, visitPartition, start, end) {
+            var segments = ts.flatten(ts.spanMap(elements, partitionSpread, function (partition, visitPartition, _start, end) {
                 return visitPartition(partition, multiLine, hasTrailingComma && end === numElements);
             }));
-            if (segments.length === 1) {
-                var firstElement = elements[0];
-                return needsUniqueCopy && ts.isSpreadElementExpression(firstElement) && firstElement.expression.kind !== 170 /* ArrayLiteralExpression */
-                    ? ts.createArraySlice(segments[0])
-                    : segments[0];
+            if (compilerOptions.downlevelIteration) {
+                if (segments.length === 1) {
+                    var firstSegment = segments[0];
+                    if (ts.isCallExpression(firstSegment)
+                        && ts.isIdentifier(firstSegment.expression)
+                        && (ts.getEmitFlags(firstSegment.expression) & 4096 /* HelperName */)
+                        && firstSegment.expression.text === "___spread") {
+                        return segments[0];
+                    }
+                }
+                return ts.createSpreadHelper(context, segments);
+            }
+            else {
+                if (segments.length === 1) {
+                    var firstElement = elements[0];
+                    return needsUniqueCopy && ts.isSpreadElement(firstElement) && firstElement.expression.kind !== 177 /* ArrayLiteralExpression */
+                        ? ts.createArraySlice(segments[0])
+                        : segments[0];
+                }
+                // Rewrite using the pattern <segment0>.concat(<segment1>, <segment2>, ...)
+                return ts.createArrayConcat(segments.shift(), segments);
             }
-            // Rewrite using the pattern <segment0>.concat(<segment1>, <segment2>, ...)
-            return ts.createArrayConcat(segments.shift(), segments);
         }
-        function partitionSpreadElement(node) {
-            return ts.isSpreadElementExpression(node)
-                ? visitSpanOfSpreadElements
-                : visitSpanOfNonSpreadElements;
+        function partitionSpread(node) {
+            return ts.isSpreadElement(node)
+                ? visitSpanOfSpreads
+                : visitSpanOfNonSpreads;
         }
-        function visitSpanOfSpreadElements(chunk, multiLine, hasTrailingComma) {
-            return ts.map(chunk, visitExpressionOfSpreadElement);
+        function visitSpanOfSpreads(chunk) {
+            return ts.map(chunk, visitExpressionOfSpread);
         }
-        function visitSpanOfNonSpreadElements(chunk, multiLine, hasTrailingComma) {
-            return ts.createArrayLiteral(ts.visitNodes(ts.createNodeArray(chunk, /*location*/ undefined, hasTrailingComma), visitor, ts.isExpression), 
-            /*location*/ undefined, multiLine);
+        function visitSpanOfNonSpreads(chunk, multiLine, hasTrailingComma) {
+            return ts.createArrayLiteral(ts.visitNodes(ts.createNodeArray(chunk, hasTrailingComma), visitor, ts.isExpression), multiLine);
+        }
+        function visitSpreadElement(node) {
+            return ts.visitNode(node.expression, visitor, ts.isExpression);
         }
         /**
-         * Transforms the expression of a SpreadElementExpression node.
+         * Transforms the expression of a SpreadExpression node.
          *
-         * @param node A SpreadElementExpression node.
+         * @param node A SpreadExpression node.
          */
-        function visitExpressionOfSpreadElement(node) {
+        function visitExpressionOfSpread(node) {
             return ts.visitNode(node.expression, visitor, ts.isExpression);
         }
         /**
@@ -50703,7 +61266,29 @@ var ts;
          * @param node A template literal.
          */
         function visitTemplateLiteral(node) {
-            return ts.createLiteral(node.text, /*location*/ node);
+            return ts.setTextRange(ts.createLiteral(node.text), node);
+        }
+        /**
+         * Visits a string literal with an extended unicode escape.
+         *
+         * @param node A string literal.
+         */
+        function visitStringLiteral(node) {
+            if (node.hasExtendedUnicodeEscape) {
+                return ts.setTextRange(ts.createLiteral(node.text), node);
+            }
+            return node;
+        }
+        /**
+         * Visits a binary or octal (ES6) numeric literal.
+         *
+         * @param node A string literal.
+         */
+        function visitNumericLiteral(node) {
+            if (node.numericLiteralFlags & 48 /* BinaryOrOctalSpecifier */) {
+                return ts.setTextRange(ts.createNumericLiteral(node.text), node);
+            }
+            return node;
         }
         /**
          * Visits a TaggedTemplateExpression node.
@@ -50757,13 +61342,13 @@ var ts;
             // thus we need to remove those characters.
             // First template piece starts with "`", others with "}"
             // Last template piece ends with "`", others with "${"
-            var isLast = node.kind === 11 /* NoSubstitutionTemplateLiteral */ || node.kind === 14 /* TemplateTail */;
+            var isLast = node.kind === 13 /* NoSubstitutionTemplateLiteral */ || node.kind === 16 /* TemplateTail */;
             text = text.substring(1, text.length - (isLast ? 1 : 2));
             // Newline normalization:
             // ES6 Spec 11.8.6.1 - Static Semantics of TV's and TRV's
             // <CR><LF> and <CR> LineTerminatorSequences are normalized to <LF> for both TV and TRV.
             text = text.replace(/\r\n?/g, "\n");
-            return ts.createLiteral(text, /*location*/ node);
+            return ts.setTextRange(ts.createLiteral(text), node);
         }
         /**
          * Visits a TemplateExpression node.
@@ -50785,7 +61370,8 @@ var ts;
             //    "abc" + (1 << 2) + ""
             var expression = ts.reduceLeft(expressions, ts.createAdd);
             if (ts.nodeIsSynthesized(expression)) {
-                ts.setTextRange(expression, node);
+                expression.pos = node.pos;
+                expression.end = node.end;
             }
             return expression;
         }
@@ -50847,39 +61433,42 @@ var ts;
         /**
          * Visits the `super` keyword
          */
-        function visitSuperKeyword(node) {
-            return enclosingNonAsyncFunctionBody
-                && ts.isClassElement(enclosingNonAsyncFunctionBody)
-                && !ts.hasModifier(enclosingNonAsyncFunctionBody, 32 /* Static */)
-                && currentParent.kind !== 174 /* CallExpression */
+        function visitSuperKeyword(isExpressionOfCall) {
+            return hierarchyFacts & 8 /* NonStaticClassElement */
+                && !isExpressionOfCall
                 ? ts.createPropertyAccess(ts.createIdentifier("_super"), "prototype")
                 : ts.createIdentifier("_super");
         }
-        function visitSourceFileNode(node) {
-            var _a = ts.span(node.statements, ts.isPrologueDirective), prologue = _a[0], remaining = _a[1];
-            var statements = [];
-            startLexicalEnvironment();
-            ts.addRange(statements, prologue);
-            addCaptureThisForNodeIfNeeded(statements, node);
-            ts.addRange(statements, ts.visitNodes(ts.createNodeArray(remaining), visitor, ts.isStatement));
-            ts.addRange(statements, endLexicalEnvironment());
-            var clone = ts.getMutableClone(node);
-            clone.statements = ts.createNodeArray(statements, /*location*/ node.statements);
-            return clone;
+        function visitMetaProperty(node) {
+            if (node.keywordToken === 94 /* NewKeyword */ && node.name.text === "target") {
+                if (hierarchyFacts & 8192 /* ComputedPropertyName */) {
+                    hierarchyFacts |= 32768 /* NewTargetInComputedPropertyName */;
+                }
+                else {
+                    hierarchyFacts |= 16384 /* NewTarget */;
+                }
+                return ts.createIdentifier("_newTarget");
+            }
+            return node;
         }
         /**
          * Called by the printer just before a node is printed.
          *
+         * @param hint A hint as to the intended usage of the node.
          * @param node The node to be printed.
+         * @param emitCallback The callback used to emit the node.
          */
-        function onEmitNode(emitContext, node, emitCallback) {
-            var savedEnclosingFunction = enclosingFunction;
+        function onEmitNode(hint, node, emitCallback) {
             if (enabledSubstitutions & 1 /* CapturedThis */ && ts.isFunctionLike(node)) {
                 // If we are tracking a captured `this`, keep track of the enclosing function.
-                enclosingFunction = node;
+                var ancestorFacts = enterSubtree(16286 /* FunctionExcludes */, ts.getEmitFlags(node) & 8 /* CapturesThis */
+                    ? 65 /* FunctionIncludes */ | 16 /* CapturesThis */
+                    : 65 /* FunctionIncludes */);
+                previousOnEmitNode(hint, node, emitCallback);
+                exitSubtree(ancestorFacts, 0 /* None */, 0 /* None */);
+                return;
             }
-            previousOnEmitNode(emitContext, node, emitCallback);
-            enclosingFunction = savedEnclosingFunction;
+            previousOnEmitNode(hint, node, emitCallback);
         }
         /**
          * Enables a more costly code path for substitutions when we determine a source file
@@ -50888,7 +61477,7 @@ var ts;
         function enableSubstitutionsForBlockScopedBindings() {
             if ((enabledSubstitutions & 2 /* BlockScopedBindings */) === 0) {
                 enabledSubstitutions |= 2 /* BlockScopedBindings */;
-                context.enableSubstitution(69 /* Identifier */);
+                context.enableSubstitution(71 /* Identifier */);
             }
         }
         /**
@@ -50898,26 +61487,25 @@ var ts;
         function enableSubstitutionsForCapturedThis() {
             if ((enabledSubstitutions & 1 /* CapturedThis */) === 0) {
                 enabledSubstitutions |= 1 /* CapturedThis */;
-                context.enableSubstitution(97 /* ThisKeyword */);
-                context.enableEmitNotification(148 /* Constructor */);
-                context.enableEmitNotification(147 /* MethodDeclaration */);
-                context.enableEmitNotification(149 /* GetAccessor */);
-                context.enableEmitNotification(150 /* SetAccessor */);
-                context.enableEmitNotification(180 /* ArrowFunction */);
-                context.enableEmitNotification(179 /* FunctionExpression */);
-                context.enableEmitNotification(220 /* FunctionDeclaration */);
+                context.enableSubstitution(99 /* ThisKeyword */);
+                context.enableEmitNotification(152 /* Constructor */);
+                context.enableEmitNotification(151 /* MethodDeclaration */);
+                context.enableEmitNotification(153 /* GetAccessor */);
+                context.enableEmitNotification(154 /* SetAccessor */);
+                context.enableEmitNotification(187 /* ArrowFunction */);
+                context.enableEmitNotification(186 /* FunctionExpression */);
+                context.enableEmitNotification(228 /* FunctionDeclaration */);
             }
         }
         /**
          * Hooks node substitutions.
          *
+         * @param hint The context for the emitter.
          * @param node The node to substitute.
-         * @param isExpression A value indicating whether the node is to be used in an expression
-         *                     position.
          */
-        function onSubstituteNode(emitContext, node) {
-            node = previousOnSubstituteNode(emitContext, node);
-            if (emitContext === 1 /* Expression */) {
+        function onSubstituteNode(hint, node) {
+            node = previousOnSubstituteNode(hint, node);
+            if (hint === 1 /* Expression */) {
                 return substituteExpression(node);
             }
             if (ts.isIdentifier(node)) {
@@ -50931,10 +61519,10 @@ var ts;
         function substituteIdentifier(node) {
             // Only substitute the identifier if we have enabled substitutions for block-scoped
             // bindings.
-            if (enabledSubstitutions & 2 /* BlockScopedBindings */) {
+            if (enabledSubstitutions & 2 /* BlockScopedBindings */ && !ts.isInternalName(node)) {
                 var original = ts.getParseTreeNode(node, ts.isIdentifier);
                 if (original && isNameOfDeclarationWithCollidingName(original)) {
-                    return ts.getGeneratedNameForNode(original);
+                    return ts.setTextRange(ts.getGeneratedNameForNode(original), node);
                 }
             }
             return node;
@@ -50948,10 +61536,10 @@ var ts;
         function isNameOfDeclarationWithCollidingName(node) {
             var parent = node.parent;
             switch (parent.kind) {
-                case 169 /* BindingElement */:
-                case 221 /* ClassDeclaration */:
-                case 224 /* EnumDeclaration */:
-                case 218 /* VariableDeclaration */:
+                case 176 /* BindingElement */:
+                case 229 /* ClassDeclaration */:
+                case 232 /* EnumDeclaration */:
+                case 226 /* VariableDeclaration */:
                     return parent.name === node
                         && resolver.isDeclarationWithCollidingName(parent);
             }
@@ -50964,9 +61552,9 @@ var ts;
          */
         function substituteExpression(node) {
             switch (node.kind) {
-                case 69 /* Identifier */:
+                case 71 /* Identifier */:
                     return substituteExpressionIdentifier(node);
-                case 97 /* ThisKeyword */:
+                case 99 /* ThisKeyword */:
                     return substituteThisKeyword(node);
             }
             return node;
@@ -50977,14 +61565,37 @@ var ts;
          * @param node An Identifier node.
          */
         function substituteExpressionIdentifier(node) {
-            if (enabledSubstitutions & 2 /* BlockScopedBindings */) {
+            if (enabledSubstitutions & 2 /* BlockScopedBindings */ && !ts.isInternalName(node)) {
                 var declaration = resolver.getReferencedDeclarationWithCollidingName(node);
-                if (declaration) {
-                    return ts.getGeneratedNameForNode(declaration.name);
+                if (declaration && !(ts.isClassLike(declaration) && isPartOfClassBody(declaration, node))) {
+                    return ts.setTextRange(ts.getGeneratedNameForNode(ts.getNameOfDeclaration(declaration)), node);
                 }
             }
             return node;
         }
+        function isPartOfClassBody(declaration, node) {
+            var currentNode = ts.getParseTreeNode(node);
+            if (!currentNode || currentNode === declaration || currentNode.end <= declaration.pos || currentNode.pos >= declaration.end) {
+                // if the node has no correlation to a parse tree node, its definitely not
+                // part of the body.
+                // if the node is outside of the document range of the declaration, its
+                // definitely not part of the body.
+                return false;
+            }
+            var blockScope = ts.getEnclosingBlockScopeContainer(declaration);
+            while (currentNode) {
+                if (currentNode === blockScope || currentNode === declaration) {
+                    // if we are in the enclosing block scope of the declaration, we are definitely
+                    // not inside the class body.
+                    return false;
+                }
+                if (ts.isClassElement(currentNode) && currentNode.parent === declaration) {
+                    return true;
+                }
+                currentNode = currentNode.parent;
+            }
+            return false;
+        }
         /**
          * Substitutes `this` when contained within an arrow function.
          *
@@ -50992,81 +61603,58 @@ var ts;
          */
         function substituteThisKeyword(node) {
             if (enabledSubstitutions & 1 /* CapturedThis */
-                && enclosingFunction
-                && ts.getEmitFlags(enclosingFunction) & 256 /* CapturesThis */) {
-                return ts.createIdentifier("_this", /*location*/ node);
+                && hierarchyFacts & 16 /* CapturesThis */) {
+                return ts.setTextRange(ts.createIdentifier("_this"), node);
             }
             return node;
         }
-        /**
-         * Gets the local name for a declaration for use in expressions.
-         *
-         * A local name will *never* be prefixed with an module or namespace export modifier like
-         * "exports.".
-         *
-         * @param node The declaration.
-         * @param allowComments A value indicating whether comments may be emitted for the name.
-         * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
-         */
-        function getLocalName(node, allowComments, allowSourceMaps) {
-            return getDeclarationName(node, allowComments, allowSourceMaps, 262144 /* LocalName */);
-        }
-        /**
-         * Gets the name of a declaration, without source map or comments.
-         *
-         * @param node The declaration.
-         * @param allowComments Allow comments for the name.
-         */
-        function getDeclarationName(node, allowComments, allowSourceMaps, emitFlags) {
-            if (node.name && !ts.isGeneratedIdentifier(node.name)) {
-                var name_37 = ts.getMutableClone(node.name);
-                emitFlags |= ts.getEmitFlags(node.name);
-                if (!allowSourceMaps) {
-                    emitFlags |= 1536 /* NoSourceMap */;
-                }
-                if (!allowComments) {
-                    emitFlags |= 49152 /* NoComments */;
-                }
-                if (emitFlags) {
-                    ts.setEmitFlags(name_37, emitFlags);
-                }
-                return name_37;
-            }
-            return ts.getGeneratedNameForNode(node);
-        }
         function getClassMemberPrefix(node, member) {
-            var expression = getLocalName(node);
-            return ts.hasModifier(member, 32 /* Static */) ? expression : ts.createPropertyAccess(expression, "prototype");
+            return ts.hasModifier(member, 32 /* Static */)
+                ? ts.getInternalName(node)
+                : ts.createPropertyAccess(ts.getInternalName(node), "prototype");
         }
         function hasSynthesizedDefaultSuperCall(constructor, hasExtendsClause) {
             if (!constructor || !hasExtendsClause) {
                 return false;
             }
-            var parameter = ts.singleOrUndefined(constructor.parameters);
-            if (!parameter || !ts.nodeIsSynthesized(parameter) || !parameter.dotDotDotToken) {
+            if (ts.some(constructor.parameters)) {
                 return false;
             }
             var statement = ts.firstOrUndefined(constructor.body.statements);
-            if (!statement || !ts.nodeIsSynthesized(statement) || statement.kind !== 202 /* ExpressionStatement */) {
+            if (!statement || !ts.nodeIsSynthesized(statement) || statement.kind !== 210 /* ExpressionStatement */) {
                 return false;
             }
             var statementExpression = statement.expression;
-            if (!ts.nodeIsSynthesized(statementExpression) || statementExpression.kind !== 174 /* CallExpression */) {
+            if (!ts.nodeIsSynthesized(statementExpression) || statementExpression.kind !== 181 /* CallExpression */) {
                 return false;
             }
             var callTarget = statementExpression.expression;
-            if (!ts.nodeIsSynthesized(callTarget) || callTarget.kind !== 95 /* SuperKeyword */) {
+            if (!ts.nodeIsSynthesized(callTarget) || callTarget.kind !== 97 /* SuperKeyword */) {
                 return false;
             }
             var callArgument = ts.singleOrUndefined(statementExpression.arguments);
-            if (!callArgument || !ts.nodeIsSynthesized(callArgument) || callArgument.kind !== 191 /* SpreadElementExpression */) {
+            if (!callArgument || !ts.nodeIsSynthesized(callArgument) || callArgument.kind !== 198 /* SpreadElement */) {
                 return false;
             }
             var expression = callArgument.expression;
-            return ts.isIdentifier(expression) && expression === parameter.name;
+            return ts.isIdentifier(expression) && expression.text === "arguments";
         }
     }
-    ts.transformES6 = transformES6;
+    ts.transformES2015 = transformES2015;
+    function createExtendsHelper(context, name) {
+        context.requestEmitHelper(extendsHelper);
+        return ts.createCall(ts.getHelperName("__extends"), 
+        /*typeArguments*/ undefined, [
+            name,
+            ts.createIdentifier("_super")
+        ]);
+    }
+    var extendsHelper = {
+        name: "typescript:extends",
+        scoped: false,
+        priority: 0,
+        text: "\n            var __extends = (this && this.__extends) || (function () {\n                var extendStatics = Object.setPrototypeOf ||\n                    ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\n                    function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };\n                return function (d, b) {\n                    extendStatics(d, b);\n                    function __() { this.constructor = d; }\n                    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\n                };\n            })();"
+    };
 })(ts || (ts = {}));
 /// <reference path="../factory.ts" />
 /// <reference path="../visitor.ts" />
@@ -51240,15 +61828,17 @@ var ts;
         Instruction[Instruction["Catch"] = 6] = "Catch";
         Instruction[Instruction["Endfinally"] = 7] = "Endfinally";
     })(Instruction || (Instruction = {}));
-    var instructionNames = ts.createMap((_a = {},
-        _a[2 /* Return */] = "return",
-        _a[3 /* Break */] = "break",
-        _a[4 /* Yield */] = "yield",
-        _a[5 /* YieldStar */] = "yield*",
-        _a[7 /* Endfinally */] = "endfinally",
-        _a));
+    function getInstructionName(instruction) {
+        switch (instruction) {
+            case 2 /* Return */: return "return";
+            case 3 /* Break */: return "break";
+            case 4 /* Yield */: return "yield";
+            case 5 /* YieldStar */: return "yield*";
+            case 7 /* Endfinally */: return "endfinally";
+        }
+    }
     function transformGenerators(context) {
-        var startLexicalEnvironment = context.startLexicalEnvironment, endLexicalEnvironment = context.endLexicalEnvironment, hoistFunctionDeclaration = context.hoistFunctionDeclaration, hoistVariableDeclaration = context.hoistVariableDeclaration;
+        var resumeLexicalEnvironment = context.resumeLexicalEnvironment, endLexicalEnvironment = context.endLexicalEnvironment, hoistFunctionDeclaration = context.hoistFunctionDeclaration, hoistVariableDeclaration = context.hoistVariableDeclaration;
         var compilerOptions = context.getCompilerOptions();
         var languageVersion = ts.getEmitScriptTarget(compilerOptions);
         var resolver = context.getEmitResolver();
@@ -51298,15 +61888,14 @@ var ts;
         var withBlockStack; // A stack containing `with` blocks.
         return transformSourceFile;
         function transformSourceFile(node) {
-            if (ts.isDeclarationFile(node)) {
+            if (node.isDeclarationFile || (node.transformFlags & 512 /* ContainsGenerator */) === 0) {
                 return node;
             }
-            if (node.transformFlags & 1024 /* ContainsGenerator */) {
-                currentSourceFile = node;
-                node = ts.visitEachChild(node, visitor, context);
-                currentSourceFile = undefined;
-            }
-            return node;
+            currentSourceFile = node;
+            var visited = ts.visitEachChild(node, visitor, context);
+            ts.addEmitHelpers(visited, context.readEmitHelpers());
+            currentSourceFile = undefined;
+            return visited;
         }
         /**
          * Visits a node.
@@ -51321,10 +61910,10 @@ var ts;
             else if (inGeneratorFunctionBody) {
                 return visitJavaScriptInGeneratorFunctionBody(node);
             }
-            else if (transformFlags & 512 /* Generator */) {
+            else if (transformFlags & 256 /* Generator */) {
                 return visitGenerator(node);
             }
-            else if (transformFlags & 1024 /* ContainsGenerator */) {
+            else if (transformFlags & 512 /* ContainsGenerator */) {
                 return ts.visitEachChild(node, visitor, context);
             }
             else {
@@ -51338,13 +61927,13 @@ var ts;
          */
         function visitJavaScriptInStatementContainingYield(node) {
             switch (node.kind) {
-                case 204 /* DoStatement */:
+                case 212 /* DoStatement */:
                     return visitDoStatement(node);
-                case 205 /* WhileStatement */:
+                case 213 /* WhileStatement */:
                     return visitWhileStatement(node);
-                case 213 /* SwitchStatement */:
+                case 221 /* SwitchStatement */:
                     return visitSwitchStatement(node);
-                case 214 /* LabeledStatement */:
+                case 222 /* LabeledStatement */:
                     return visitLabeledStatement(node);
                 default:
                     return visitJavaScriptInGeneratorFunctionBody(node);
@@ -51357,30 +61946,30 @@ var ts;
          */
         function visitJavaScriptInGeneratorFunctionBody(node) {
             switch (node.kind) {
-                case 220 /* FunctionDeclaration */:
+                case 228 /* FunctionDeclaration */:
                     return visitFunctionDeclaration(node);
-                case 179 /* FunctionExpression */:
+                case 186 /* FunctionExpression */:
                     return visitFunctionExpression(node);
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
+                case 153 /* GetAccessor */:
+                case 154 /* SetAccessor */:
                     return visitAccessorDeclaration(node);
-                case 200 /* VariableStatement */:
+                case 208 /* VariableStatement */:
                     return visitVariableStatement(node);
-                case 206 /* ForStatement */:
+                case 214 /* ForStatement */:
                     return visitForStatement(node);
-                case 207 /* ForInStatement */:
+                case 215 /* ForInStatement */:
                     return visitForInStatement(node);
-                case 210 /* BreakStatement */:
+                case 218 /* BreakStatement */:
                     return visitBreakStatement(node);
-                case 209 /* ContinueStatement */:
+                case 217 /* ContinueStatement */:
                     return visitContinueStatement(node);
-                case 211 /* ReturnStatement */:
+                case 219 /* ReturnStatement */:
                     return visitReturnStatement(node);
                 default:
-                    if (node.transformFlags & 4194304 /* ContainsYield */) {
+                    if (node.transformFlags & 16777216 /* ContainsYield */) {
                         return visitJavaScriptContainingYield(node);
                     }
-                    else if (node.transformFlags & (1024 /* ContainsGenerator */ | 8388608 /* ContainsHoistedDeclarationOrCompletion */)) {
+                    else if (node.transformFlags & (512 /* ContainsGenerator */ | 33554432 /* ContainsHoistedDeclarationOrCompletion */)) {
                         return ts.visitEachChild(node, visitor, context);
                     }
                     else {
@@ -51395,21 +61984,21 @@ var ts;
          */
         function visitJavaScriptContainingYield(node) {
             switch (node.kind) {
-                case 187 /* BinaryExpression */:
+                case 194 /* BinaryExpression */:
                     return visitBinaryExpression(node);
-                case 188 /* ConditionalExpression */:
+                case 195 /* ConditionalExpression */:
                     return visitConditionalExpression(node);
-                case 190 /* YieldExpression */:
+                case 197 /* YieldExpression */:
                     return visitYieldExpression(node);
-                case 170 /* ArrayLiteralExpression */:
+                case 177 /* ArrayLiteralExpression */:
                     return visitArrayLiteralExpression(node);
-                case 171 /* ObjectLiteralExpression */:
+                case 178 /* ObjectLiteralExpression */:
                     return visitObjectLiteralExpression(node);
-                case 173 /* ElementAccessExpression */:
+                case 180 /* ElementAccessExpression */:
                     return visitElementAccessExpression(node);
-                case 174 /* CallExpression */:
+                case 181 /* CallExpression */:
                     return visitCallExpression(node);
-                case 175 /* NewExpression */:
+                case 182 /* NewExpression */:
                     return visitNewExpression(node);
                 default:
                     return ts.visitEachChild(node, visitor, context);
@@ -51422,9 +62011,9 @@ var ts;
          */
         function visitGenerator(node) {
             switch (node.kind) {
-                case 220 /* FunctionDeclaration */:
+                case 228 /* FunctionDeclaration */:
                     return visitFunctionDeclaration(node);
-                case 179 /* FunctionExpression */:
+                case 186 /* FunctionExpression */:
                     return visitFunctionExpression(node);
                 default:
                     ts.Debug.failBadSyntaxKind(node);
@@ -51442,13 +62031,12 @@ var ts;
          */
         function visitFunctionDeclaration(node) {
             // Currently, we only support generators that were originally async functions.
-            if (node.asteriskToken && ts.getEmitFlags(node) & 2097152 /* AsyncFunctionBody */) {
-                node = ts.setOriginalNode(ts.createFunctionDeclaration(
-                /*decorators*/ undefined, 
-                /*modifiers*/ undefined, 
+            if (node.asteriskToken) {
+                node = ts.setOriginalNode(ts.setTextRange(ts.createFunctionDeclaration(
+                /*decorators*/ undefined, node.modifiers, 
                 /*asteriskToken*/ undefined, node.name, 
-                /*typeParameters*/ undefined, node.parameters, 
-                /*type*/ undefined, transformGeneratorFunctionBody(node.body), 
+                /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
+                /*type*/ undefined, transformGeneratorFunctionBody(node.body)), 
                 /*location*/ node), node);
             }
             else {
@@ -51481,11 +62069,12 @@ var ts;
          */
         function visitFunctionExpression(node) {
             // Currently, we only support generators that were originally async functions.
-            if (node.asteriskToken && ts.getEmitFlags(node) & 2097152 /* AsyncFunctionBody */) {
-                node = ts.setOriginalNode(ts.createFunctionExpression(
+            if (node.asteriskToken) {
+                node = ts.setOriginalNode(ts.setTextRange(ts.createFunctionExpression(
+                /*modifiers*/ undefined, 
                 /*asteriskToken*/ undefined, node.name, 
-                /*typeParameters*/ undefined, node.parameters, 
-                /*type*/ undefined, transformGeneratorFunctionBody(node.body), 
+                /*typeParameters*/ undefined, ts.visitParameterList(node.parameters, visitor, context), 
+                /*type*/ undefined, transformGeneratorFunctionBody(node.body)), 
                 /*location*/ node), node);
             }
             else {
@@ -51530,6 +62119,7 @@ var ts;
             var savedBlocks = blocks;
             var savedBlockOffsets = blockOffsets;
             var savedBlockActions = blockActions;
+            var savedBlockStack = blockStack;
             var savedLabelOffsets = labelOffsets;
             var savedLabelExpressions = labelExpressions;
             var savedNextLabelId = nextLabelId;
@@ -51543,6 +62133,7 @@ var ts;
             blocks = undefined;
             blockOffsets = undefined;
             blockActions = undefined;
+            blockStack = undefined;
             labelOffsets = undefined;
             labelExpressions = undefined;
             nextLabelId = 1;
@@ -51551,8 +62142,8 @@ var ts;
             operationLocations = undefined;
             state = ts.createTempVariable(/*recordTempVariable*/ undefined);
             // Build the generator
-            startLexicalEnvironment();
-            var statementOffset = ts.addPrologueDirectives(statements, body.statements, /*ensureUseStrict*/ false, visitor);
+            resumeLexicalEnvironment();
+            var statementOffset = ts.addPrologue(statements, body.statements, /*ensureUseStrict*/ false, visitor);
             transformAndEmitStatements(body.statements, statementOffset);
             var buildResult = build();
             ts.addRange(statements, endLexicalEnvironment());
@@ -51563,6 +62154,7 @@ var ts;
             blocks = savedBlocks;
             blockOffsets = savedBlockOffsets;
             blockActions = savedBlockActions;
+            blockStack = savedBlockStack;
             labelOffsets = savedLabelOffsets;
             labelExpressions = savedLabelExpressions;
             nextLabelId = savedNextLabelId;
@@ -51570,7 +62162,7 @@ var ts;
             operationArguments = savedOperationArguments;
             operationLocations = savedOperationLocations;
             state = savedState;
-            return ts.createBlock(statements, /*location*/ body, body.multiLine);
+            return ts.setTextRange(ts.createBlock(statements, body.multiLine), body);
         }
         /**
          * Visits a variable statement.
@@ -51581,13 +62173,13 @@ var ts;
          * @param node The node to visit.
          */
         function visitVariableStatement(node) {
-            if (node.transformFlags & 4194304 /* ContainsYield */) {
+            if (node.transformFlags & 16777216 /* ContainsYield */) {
                 transformAndEmitVariableDeclarationList(node.declarationList);
                 return undefined;
             }
             else {
                 // Do not hoist custom prologues.
-                if (ts.getEmitFlags(node) & 8388608 /* CustomPrologue */) {
+                if (ts.getEmitFlags(node) & 1048576 /* CustomPrologue */) {
                     return node;
                 }
                 for (var _i = 0, _a = node.declarationList.declarations; _i < _a.length; _i++) {
@@ -51598,7 +62190,7 @@ var ts;
                 if (variables.length === 0) {
                     return undefined;
                 }
-                return ts.createStatement(ts.inlineExpressions(ts.map(variables, transformInitializedVariable)));
+                return ts.setSourceMapRange(ts.createStatement(ts.inlineExpressions(ts.map(variables, transformInitializedVariable))), node);
             }
         }
         /**
@@ -51620,23 +62212,23 @@ var ts;
             }
         }
         function isCompoundAssignment(kind) {
-            return kind >= 57 /* FirstCompoundAssignment */
-                && kind <= 68 /* LastCompoundAssignment */;
+            return kind >= 59 /* FirstCompoundAssignment */
+                && kind <= 70 /* LastCompoundAssignment */;
         }
         function getOperatorForCompoundAssignment(kind) {
             switch (kind) {
-                case 57 /* PlusEqualsToken */: return 35 /* PlusToken */;
-                case 58 /* MinusEqualsToken */: return 36 /* MinusToken */;
-                case 59 /* AsteriskEqualsToken */: return 37 /* AsteriskToken */;
-                case 60 /* AsteriskAsteriskEqualsToken */: return 38 /* AsteriskAsteriskToken */;
-                case 61 /* SlashEqualsToken */: return 39 /* SlashToken */;
-                case 62 /* PercentEqualsToken */: return 40 /* PercentToken */;
-                case 63 /* LessThanLessThanEqualsToken */: return 43 /* LessThanLessThanToken */;
-                case 64 /* GreaterThanGreaterThanEqualsToken */: return 44 /* GreaterThanGreaterThanToken */;
-                case 65 /* GreaterThanGreaterThanGreaterThanEqualsToken */: return 45 /* GreaterThanGreaterThanGreaterThanToken */;
-                case 66 /* AmpersandEqualsToken */: return 46 /* AmpersandToken */;
-                case 67 /* BarEqualsToken */: return 47 /* BarToken */;
-                case 68 /* CaretEqualsToken */: return 48 /* CaretToken */;
+                case 59 /* PlusEqualsToken */: return 37 /* PlusToken */;
+                case 60 /* MinusEqualsToken */: return 38 /* MinusToken */;
+                case 61 /* AsteriskEqualsToken */: return 39 /* AsteriskToken */;
+                case 62 /* AsteriskAsteriskEqualsToken */: return 40 /* AsteriskAsteriskToken */;
+                case 63 /* SlashEqualsToken */: return 41 /* SlashToken */;
+                case 64 /* PercentEqualsToken */: return 42 /* PercentToken */;
+                case 65 /* LessThanLessThanEqualsToken */: return 45 /* LessThanLessThanToken */;
+                case 66 /* GreaterThanGreaterThanEqualsToken */: return 46 /* GreaterThanGreaterThanToken */;
+                case 67 /* GreaterThanGreaterThanGreaterThanEqualsToken */: return 47 /* GreaterThanGreaterThanGreaterThanToken */;
+                case 68 /* AmpersandEqualsToken */: return 48 /* AmpersandToken */;
+                case 69 /* BarEqualsToken */: return 49 /* BarToken */;
+                case 70 /* CaretEqualsToken */: return 50 /* CaretToken */;
             }
         }
         /**
@@ -51649,7 +62241,7 @@ var ts;
             if (containsYield(right)) {
                 var target = void 0;
                 switch (left.kind) {
-                    case 172 /* PropertyAccessExpression */:
+                    case 179 /* PropertyAccessExpression */:
                         // [source]
                         //      a.b = yield;
                         //
@@ -51661,7 +62253,7 @@ var ts;
                         //      _a.b = %sent%;
                         target = ts.updatePropertyAccess(left, cacheExpression(ts.visitNode(left.expression, visitor, ts.isLeftHandSideExpression)), left.name);
                         break;
-                    case 173 /* ElementAccessExpression */:
+                    case 180 /* ElementAccessExpression */:
                         // [source]
                         //      a[b] = yield;
                         //
@@ -51680,7 +62272,7 @@ var ts;
                 }
                 var operator = node.operatorToken.kind;
                 if (isCompoundAssignment(operator)) {
-                    return ts.createBinary(target, 56 /* EqualsToken */, ts.createBinary(cacheExpression(target), getOperatorForCompoundAssignment(operator), ts.visitNode(right, visitor, ts.isExpression), node), node);
+                    return ts.setTextRange(ts.createAssignment(target, ts.setTextRange(ts.createBinary(cacheExpression(target), getOperatorForCompoundAssignment(operator), ts.visitNode(right, visitor, ts.isExpression)), node)), node);
                 }
                 else {
                     return ts.updateBinary(node, target, ts.visitNode(right, visitor, ts.isExpression));
@@ -51693,7 +62285,7 @@ var ts;
                 if (ts.isLogicalOperator(node.operatorToken.kind)) {
                     return visitLogicalBinaryExpression(node);
                 }
-                else if (node.operatorToken.kind === 24 /* CommaToken */) {
+                else if (node.operatorToken.kind === 26 /* CommaToken */) {
                     return visitCommaExpression(node);
                 }
                 // [source]
@@ -51704,10 +62296,10 @@ var ts;
                 //      _a = a();
                 //  .yield resumeLabel
                 //      _a + %sent% + c()
-                var clone_6 = ts.getMutableClone(node);
-                clone_6.left = cacheExpression(ts.visitNode(node.left, visitor, ts.isExpression));
-                clone_6.right = ts.visitNode(node.right, visitor, ts.isExpression);
-                return clone_6;
+                var clone_4 = ts.getMutableClone(node);
+                clone_4.left = cacheExpression(ts.visitNode(node.left, visitor, ts.isExpression));
+                clone_4.right = ts.visitNode(node.right, visitor, ts.isExpression);
+                return clone_4;
             }
             return ts.visitEachChild(node, visitor, context);
         }
@@ -51748,7 +62340,7 @@ var ts;
             var resultLabel = defineLabel();
             var resultLocal = declareLocal();
             emitAssignment(resultLocal, ts.visitNode(node.left, visitor, ts.isExpression), /*location*/ node.left);
-            if (node.operatorToken.kind === 51 /* AmpersandAmpersandToken */) {
+            if (node.operatorToken.kind === 53 /* AmpersandAmpersandToken */) {
                 // Logical `&&` shortcuts when the left-hand operand is falsey.
                 emitBreakWhenFalse(resultLabel, resultLocal, /*location*/ node.left);
             }
@@ -51779,7 +62371,7 @@ var ts;
             visit(node.right);
             return ts.inlineExpressions(pendingExpressions);
             function visit(node) {
-                if (ts.isBinaryExpression(node) && node.operatorToken.kind === 24 /* CommaToken */) {
+                if (ts.isBinaryExpression(node) && node.operatorToken.kind === 26 /* CommaToken */) {
                     visit(node.left);
                     visit(node.right);
                 }
@@ -51842,17 +62434,19 @@ var ts;
             //  .yield resumeLabel, (a())
             //  .mark resumeLabel
             //      x = %sent%;
-            // NOTE: we are explicitly not handling YieldStar at this time.
             var resumeLabel = defineLabel();
             var expression = ts.visitNode(node.expression, visitor, ts.isExpression);
             if (node.asteriskToken) {
-                emitYieldStar(expression, /*location*/ node);
+                var iterator = (ts.getEmitFlags(node.expression) & 8388608 /* Iterator */) === 0
+                    ? ts.createValuesHelper(context, expression, /*location*/ node)
+                    : expression;
+                emitYieldStar(iterator, /*location*/ node);
             }
             else {
                 emitYield(expression, /*location*/ node);
             }
             markLabel(resumeLabel);
-            return createGeneratorResume();
+            return createGeneratorResume(/*location*/ node);
         }
         /**
          * Visits an ArrayLiteralExpression that contains a YieldExpression.
@@ -51860,7 +62454,7 @@ var ts;
          * @param node The node to visit.
          */
         function visitArrayLiteralExpression(node) {
-            return visitElements(node.elements, node.multiLine);
+            return visitElements(node.elements, /*leadingElement*/ undefined, /*location*/ undefined, node.multiLine);
         }
         /**
          * Visits an array of expressions containing one or more YieldExpression nodes
@@ -51869,7 +62463,7 @@ var ts;
          * @param elements The elements to visit.
          * @param multiLine Whether array literals created should be emitted on multiple lines.
          */
-        function visitElements(elements, multiLine) {
+        function visitElements(elements, leadingElement, location, multiLine) {
             // [source]
             //      ar = [1, yield, 2];
             //
@@ -51880,22 +62474,28 @@ var ts;
             //  .mark resumeLabel
             //      ar = _a.concat([%sent%, 2]);
             var numInitialElements = countInitialNodesWithoutYield(elements);
-            var temp = declareLocal();
-            var hasAssignedTemp = false;
+            var temp;
             if (numInitialElements > 0) {
-                emitAssignment(temp, ts.createArrayLiteral(ts.visitNodes(elements, visitor, ts.isExpression, 0, numInitialElements)));
-                hasAssignedTemp = true;
+                temp = declareLocal();
+                var initialElements = ts.visitNodes(elements, visitor, ts.isExpression, 0, numInitialElements);
+                emitAssignment(temp, ts.createArrayLiteral(leadingElement
+                    ? [leadingElement].concat(initialElements) : initialElements));
+                leadingElement = undefined;
             }
             var expressions = ts.reduceLeft(elements, reduceElement, [], numInitialElements);
-            return hasAssignedTemp
-                ? ts.createArrayConcat(temp, [ts.createArrayLiteral(expressions)])
-                : ts.createArrayLiteral(expressions);
+            return temp
+                ? ts.createArrayConcat(temp, [ts.createArrayLiteral(expressions, multiLine)])
+                : ts.setTextRange(ts.createArrayLiteral(leadingElement ? [leadingElement].concat(expressions) : expressions, multiLine), location);
             function reduceElement(expressions, element) {
                 if (containsYield(element) && expressions.length > 0) {
+                    var hasAssignedTemp = temp !== undefined;
+                    if (!temp) {
+                        temp = declareLocal();
+                    }
                     emitAssignment(temp, hasAssignedTemp
-                        ? ts.createArrayConcat(temp, [ts.createArrayLiteral(expressions)])
-                        : ts.createArrayLiteral(expressions));
-                    hasAssignedTemp = true;
+                        ? ts.createArrayConcat(temp, [ts.createArrayLiteral(expressions, multiLine)])
+                        : ts.createArrayLiteral(leadingElement ? [leadingElement].concat(expressions) : expressions, multiLine));
+                    leadingElement = undefined;
                     expressions = [];
                 }
                 expressions.push(ts.visitNode(element, visitor, ts.isExpression));
@@ -51924,8 +62524,7 @@ var ts;
             var multiLine = node.multiLine;
             var numInitialProperties = countInitialNodesWithoutYield(properties);
             var temp = declareLocal();
-            emitAssignment(temp, ts.createObjectLiteral(ts.visitNodes(properties, visitor, ts.isObjectLiteralElementLike, 0, numInitialProperties), 
-            /*location*/ undefined, multiLine));
+            emitAssignment(temp, ts.createObjectLiteral(ts.visitNodes(properties, visitor, ts.isObjectLiteralElementLike, 0, numInitialProperties), multiLine));
             var expressions = ts.reduceLeft(properties, reduceProperty, [], numInitialProperties);
             expressions.push(multiLine ? ts.startOnNewLine(ts.getMutableClone(temp)) : temp);
             return ts.inlineExpressions(expressions);
@@ -51961,10 +62560,10 @@ var ts;
                 //  .yield resumeLabel
                 //  .mark resumeLabel
                 //      a = _a[%sent%]
-                var clone_7 = ts.getMutableClone(node);
-                clone_7.expression = cacheExpression(ts.visitNode(node.expression, visitor, ts.isLeftHandSideExpression));
-                clone_7.argumentExpression = ts.visitNode(node.argumentExpression, visitor, ts.isExpression);
-                return clone_7;
+                var clone_5 = ts.getMutableClone(node);
+                clone_5.expression = cacheExpression(ts.visitNode(node.expression, visitor, ts.isLeftHandSideExpression));
+                clone_5.argumentExpression = ts.visitNode(node.argumentExpression, visitor, ts.isExpression);
+                return clone_5;
             }
             return ts.visitEachChild(node, visitor, context);
         }
@@ -51981,7 +62580,7 @@ var ts;
                 //  .mark resumeLabel
                 //      _b.apply(_a, _c.concat([%sent%, 2]));
                 var _a = ts.createCallBinding(node.expression, hoistVariableDeclaration, languageVersion, /*cacheIdentifiers*/ true), target = _a.target, thisArg = _a.thisArg;
-                return ts.setOriginalNode(ts.createFunctionApply(cacheExpression(ts.visitNode(target, visitor, ts.isLeftHandSideExpression)), thisArg, visitElements(node.arguments, /*multiLine*/ false), 
+                return ts.setOriginalNode(ts.createFunctionApply(cacheExpression(ts.visitNode(target, visitor, ts.isLeftHandSideExpression)), thisArg, visitElements(node.arguments), 
                 /*location*/ node), node);
             }
             return ts.visitEachChild(node, visitor, context);
@@ -51999,9 +62598,9 @@ var ts;
                 //  .mark resumeLabel
                 //      new (_b.apply(_a, _c.concat([%sent%, 2])));
                 var _a = ts.createCallBinding(ts.createPropertyAccess(node.expression, "bind"), hoistVariableDeclaration), target = _a.target, thisArg = _a.thisArg;
-                return ts.setOriginalNode(ts.createNew(ts.createFunctionApply(cacheExpression(ts.visitNode(target, visitor, ts.isExpression)), thisArg, visitElements(node.arguments, /*multiLine*/ false)), 
-                /*typeArguments*/ undefined, [], 
-                /*location*/ node), node);
+                return ts.setOriginalNode(ts.setTextRange(ts.createNew(ts.createFunctionApply(cacheExpression(ts.visitNode(target, visitor, ts.isExpression)), thisArg, visitElements(node.arguments, 
+                /*leadingElement*/ ts.createVoidZero())), 
+                /*typeArguments*/ undefined, []), node), node);
             }
             return ts.visitEachChild(node, visitor, context);
         }
@@ -52030,38 +62629,38 @@ var ts;
         }
         function transformAndEmitStatementWorker(node) {
             switch (node.kind) {
-                case 199 /* Block */:
+                case 207 /* Block */:
                     return transformAndEmitBlock(node);
-                case 202 /* ExpressionStatement */:
+                case 210 /* ExpressionStatement */:
                     return transformAndEmitExpressionStatement(node);
-                case 203 /* IfStatement */:
+                case 211 /* IfStatement */:
                     return transformAndEmitIfStatement(node);
-                case 204 /* DoStatement */:
+                case 212 /* DoStatement */:
                     return transformAndEmitDoStatement(node);
-                case 205 /* WhileStatement */:
+                case 213 /* WhileStatement */:
                     return transformAndEmitWhileStatement(node);
-                case 206 /* ForStatement */:
+                case 214 /* ForStatement */:
                     return transformAndEmitForStatement(node);
-                case 207 /* ForInStatement */:
+                case 215 /* ForInStatement */:
                     return transformAndEmitForInStatement(node);
-                case 209 /* ContinueStatement */:
+                case 217 /* ContinueStatement */:
                     return transformAndEmitContinueStatement(node);
-                case 210 /* BreakStatement */:
+                case 218 /* BreakStatement */:
                     return transformAndEmitBreakStatement(node);
-                case 211 /* ReturnStatement */:
+                case 219 /* ReturnStatement */:
                     return transformAndEmitReturnStatement(node);
-                case 212 /* WithStatement */:
+                case 220 /* WithStatement */:
                     return transformAndEmitWithStatement(node);
-                case 213 /* SwitchStatement */:
+                case 221 /* SwitchStatement */:
                     return transformAndEmitSwitchStatement(node);
-                case 214 /* LabeledStatement */:
+                case 222 /* LabeledStatement */:
                     return transformAndEmitLabeledStatement(node);
-                case 215 /* ThrowStatement */:
+                case 223 /* ThrowStatement */:
                     return transformAndEmitThrowStatement(node);
-                case 216 /* TryStatement */:
+                case 224 /* TryStatement */:
                     return transformAndEmitTryStatement(node);
                 default:
-                    return emitStatement(ts.visitNode(node, visitor, ts.isStatement, /*optional*/ true));
+                    return emitStatement(ts.visitNode(node, visitor, ts.isStatement));
             }
         }
         function transformAndEmitBlock(node) {
@@ -52078,7 +62677,9 @@ var ts;
         function transformAndEmitVariableDeclarationList(node) {
             for (var _i = 0, _a = node.declarations; _i < _a.length; _i++) {
                 var variable = _a[_i];
-                hoistVariableDeclaration(variable.name);
+                var name_52 = ts.getSynthesizedClone(variable.name);
+                ts.setCommentRange(name_52, variable.name);
+                hoistVariableDeclaration(name_52);
             }
             var variables = ts.getInitializedVariables(node);
             var numVariables = variables.length;
@@ -52101,7 +62702,7 @@ var ts;
             return undefined;
         }
         function transformInitializedVariable(node) {
-            return ts.createAssignment(ts.getSynthesizedClone(node.name), ts.visitNode(node.initializer, visitor, ts.isExpression));
+            return ts.setSourceMapRange(ts.createAssignment(ts.setSourceMapRange(ts.getSynthesizedClone(node.name), node.name), ts.visitNode(node.initializer, visitor, ts.isExpression)), node);
         }
         function transformAndEmitIfStatement(node) {
             if (containsYield(node)) {
@@ -52121,7 +62722,7 @@ var ts;
                 if (containsYield(node.thenStatement) || containsYield(node.elseStatement)) {
                     var endLabel = defineLabel();
                     var elseLabel = node.elseStatement ? defineLabel() : undefined;
-                    emitBreakWhenFalse(node.elseStatement ? elseLabel : endLabel, ts.visitNode(node.expression, visitor, ts.isExpression));
+                    emitBreakWhenFalse(node.elseStatement ? elseLabel : endLabel, ts.visitNode(node.expression, visitor, ts.isExpression), /*location*/ node.expression);
                     transformAndEmitEmbeddedStatement(node.thenStatement);
                     if (node.elseStatement) {
                         emitBreak(endLabel);
@@ -52244,8 +62845,7 @@ var ts;
                         transformAndEmitVariableDeclarationList(initializer);
                     }
                     else {
-                        emitStatement(ts.createStatement(ts.visitNode(initializer, visitor, ts.isExpression), 
-                        /*location*/ initializer));
+                        emitStatement(ts.setTextRange(ts.createStatement(ts.visitNode(initializer, visitor, ts.isExpression)), initializer));
                     }
                 }
                 markLabel(conditionLabel);
@@ -52255,8 +62855,7 @@ var ts;
                 transformAndEmitEmbeddedStatement(node.statement);
                 markLabel(incrementLabel);
                 if (node.incrementor) {
-                    emitStatement(ts.createStatement(ts.visitNode(node.incrementor, visitor, ts.isExpression), 
-                    /*location*/ node.incrementor));
+                    emitStatement(ts.setTextRange(ts.createStatement(ts.visitNode(node.incrementor, visitor, ts.isExpression)), node.incrementor));
                 }
                 emitBreak(conditionLabel);
                 endLoopBlock();
@@ -52270,7 +62869,7 @@ var ts;
                 beginScriptLoopBlock();
             }
             var initializer = node.initializer;
-            if (ts.isVariableDeclarationList(initializer)) {
+            if (initializer && ts.isVariableDeclarationList(initializer)) {
                 for (var _i = 0, _a = initializer.declarations; _i < _a.length; _i++) {
                     var variable = _a[_i];
                     hoistVariableDeclaration(variable.name);
@@ -52278,7 +62877,7 @@ var ts;
                 var variables = ts.getInitializedVariables(initializer);
                 node = ts.updateFor(node, variables.length > 0
                     ? ts.inlineExpressions(ts.map(variables, transformInitializedVariable))
-                    : undefined, ts.visitNode(node.condition, visitor, ts.isExpression, /*optional*/ true), ts.visitNode(node.incrementor, visitor, ts.isExpression, /*optional*/ true), ts.visitNode(node.statement, visitor, ts.isStatement, /*optional*/ false, ts.liftToBlock));
+                    : undefined, ts.visitNode(node.condition, visitor, ts.isExpression), ts.visitNode(node.incrementor, visitor, ts.isExpression), ts.visitNode(node.statement, visitor, ts.isStatement, ts.liftToBlock));
             }
             else {
                 node = ts.visitEachChild(node, visitor, context);
@@ -52370,7 +62969,7 @@ var ts;
                     var variable = _a[_i];
                     hoistVariableDeclaration(variable.name);
                 }
-                node = ts.updateForIn(node, initializer.declarations[0].name, ts.visitNode(node.expression, visitor, ts.isExpression), ts.visitNode(node.statement, visitor, ts.isStatement, /*optional*/ false, ts.liftToBlock));
+                node = ts.updateForIn(node, initializer.declarations[0].name, ts.visitNode(node.expression, visitor, ts.isExpression), ts.visitNode(node.statement, visitor, ts.isStatement, ts.liftToBlock));
             }
             else {
                 node = ts.visitEachChild(node, visitor, context);
@@ -52409,11 +63008,11 @@ var ts;
             return ts.visitEachChild(node, visitor, context);
         }
         function transformAndEmitReturnStatement(node) {
-            emitReturn(ts.visitNode(node.expression, visitor, ts.isExpression, /*optional*/ true), 
+            emitReturn(ts.visitNode(node.expression, visitor, ts.isExpression), 
             /*location*/ node);
         }
         function visitReturnStatement(node) {
-            return createInlineReturn(ts.visitNode(node.expression, visitor, ts.isExpression, /*optional*/ true), 
+            return createInlineReturn(ts.visitNode(node.expression, visitor, ts.isExpression), 
             /*location*/ node);
         }
         function transformAndEmitWithStatement(node) {
@@ -52478,7 +63077,7 @@ var ts;
                 for (var i = 0; i < numClauses; i++) {
                     var clause = caseBlock.clauses[i];
                     clauseLabels.push(defineLabel());
-                    if (clause.kind === 250 /* DefaultClause */ && defaultClauseIndex === -1) {
+                    if (clause.kind === 258 /* DefaultClause */ && defaultClauseIndex === -1) {
                         defaultClauseIndex = i;
                     }
                 }
@@ -52491,7 +63090,7 @@ var ts;
                     var defaultClausesSkipped = 0;
                     for (var i = clausesWritten; i < numClauses; i++) {
                         var clause = caseBlock.clauses[i];
-                        if (clause.kind === 249 /* CaseClause */) {
+                        if (clause.kind === 257 /* CaseClause */) {
                             var caseClause = clause;
                             if (containsYield(caseClause.expression) && pendingClauses.length > 0) {
                                 break;
@@ -52622,7 +63221,7 @@ var ts;
             }
         }
         function containsYield(node) {
-            return node && (node.transformFlags & 4194304 /* ContainsYield */) !== 0;
+            return node && (node.transformFlags & 16777216 /* ContainsYield */) !== 0;
         }
         function countInitialNodesWithoutYield(nodes) {
             var numNodes = nodes.length;
@@ -52633,9 +63232,9 @@ var ts;
             }
             return -1;
         }
-        function onSubstituteNode(emitContext, node) {
-            node = previousOnSubstituteNode(emitContext, node);
-            if (emitContext === 1 /* Expression */) {
+        function onSubstituteNode(hint, node) {
+            node = previousOnSubstituteNode(hint, node);
+            if (hint === 1 /* Expression */) {
                 return substituteExpression(node);
             }
             return node;
@@ -52647,17 +63246,17 @@ var ts;
             return node;
         }
         function substituteExpressionIdentifier(node) {
-            if (renamedCatchVariables && ts.hasProperty(renamedCatchVariables, node.text)) {
+            if (!ts.isGeneratedIdentifier(node) && renamedCatchVariables && renamedCatchVariables.has(node.text)) {
                 var original = ts.getOriginalNode(node);
                 if (ts.isIdentifier(original) && original.parent) {
                     var declaration = resolver.getReferencedValueDeclaration(original);
                     if (declaration) {
-                        var name_38 = ts.getProperty(renamedCatchVariableDeclarations, String(ts.getOriginalNodeId(declaration)));
-                        if (name_38) {
-                            var clone_8 = ts.getMutableClone(name_38);
-                            ts.setSourceMapRange(clone_8, node);
-                            ts.setCommentRange(clone_8, node);
-                            return clone_8;
+                        var name_53 = renamedCatchVariableDeclarations[ts.getOriginalNodeId(declaration)];
+                        if (name_53) {
+                            var clone_6 = ts.getMutableClone(name_53);
+                            ts.setSourceMapRange(clone_6, node);
+                            ts.setCommentRange(clone_6, node);
+                            return clone_6;
                         }
                     }
                 }
@@ -52666,7 +63265,7 @@ var ts;
         }
         function cacheExpression(node) {
             var temp;
-            if (ts.isGeneratedIdentifier(node)) {
+            if (ts.isGeneratedIdentifier(node) || ts.getEmitFlags(node) & 4096 /* HelperName */) {
                 return node;
             }
             temp = ts.createTempVariable(hoistVariableDeclaration);
@@ -52794,15 +63393,23 @@ var ts;
          */
         function beginCatchBlock(variable) {
             ts.Debug.assert(peekBlockKind() === 0 /* Exception */);
-            var text = variable.name.text;
-            var name = declareLocal(text);
-            if (!renamedCatchVariables) {
-                renamedCatchVariables = ts.createMap();
-                renamedCatchVariableDeclarations = ts.createMap();
-                context.enableSubstitution(69 /* Identifier */);
-            }
-            renamedCatchVariables[text] = true;
-            renamedCatchVariableDeclarations[ts.getOriginalNodeId(variable)] = name;
+            // generated identifiers should already be unique within a file
+            var name;
+            if (ts.isGeneratedIdentifier(variable.name)) {
+                name = variable.name;
+                hoistVariableDeclaration(variable.name);
+            }
+            else {
+                var text = variable.name.text;
+                name = declareLocal(text);
+                if (!renamedCatchVariables) {
+                    renamedCatchVariables = ts.createMap();
+                    renamedCatchVariableDeclarations = [];
+                    context.enableSubstitution(71 /* Identifier */);
+                }
+                renamedCatchVariables.set(text, true);
+                renamedCatchVariableDeclarations[ts.getOriginalNodeId(variable)] = name;
+            }
             var exception = peekBlock();
             ts.Debug.assert(exception.state < 1 /* Catch */);
             var endLabel = exception.endLabel;
@@ -53056,7 +63663,7 @@ var ts;
                 if (labelExpressions === undefined) {
                     labelExpressions = [];
                 }
-                var expression = ts.createSynthesizedNode(8 /* NumericLiteral */);
+                var expression = ts.createLiteral(-1);
                 if (labelExpressions[label] === undefined) {
                     labelExpressions[label] = [expression];
                 }
@@ -53065,14 +63672,14 @@ var ts;
                 }
                 return expression;
             }
-            return ts.createNode(193 /* OmittedExpression */);
+            return ts.createOmittedExpression();
         }
         /**
          * Creates a numeric literal for the provided instruction.
          */
         function createInstruction(instruction) {
             var literal = ts.createLiteral(instruction);
-            literal.trailingComment = instructionNames[instruction];
+            ts.addSyntheticTrailingComment(literal, 3 /* MultiLineCommentTrivia */, getInstructionName(instruction));
             return literal;
         }
         /**
@@ -53083,10 +63690,10 @@ var ts;
          */
         function createInlineBreak(label, location) {
             ts.Debug.assert(label > 0, "Invalid label: " + label);
-            return ts.createReturn(ts.createArrayLiteral([
+            return ts.setTextRange(ts.createReturn(ts.createArrayLiteral([
                 createInstruction(3 /* Break */),
                 createLabel(label)
-            ]), location);
+            ])), location);
         }
         /**
          * Creates a statement that can be used indicate a Return operation.
@@ -53095,15 +63702,16 @@ var ts;
          * @param location An optional source map location for the statement.
          */
         function createInlineReturn(expression, location) {
-            return ts.createReturn(ts.createArrayLiteral(expression
+            return ts.setTextRange(ts.createReturn(ts.createArrayLiteral(expression
                 ? [createInstruction(2 /* Return */), expression]
-                : [createInstruction(2 /* Return */)]), location);
+                : [createInstruction(2 /* Return */)])), location);
         }
         /**
          * Creates an expression that can be used to resume from a Yield operation.
          */
         function createGeneratorResume(location) {
-            return ts.createCall(ts.createPropertyAccess(state, "sent"), /*typeArguments*/ undefined, [], location);
+            return ts.setTextRange(ts.createCall(ts.createPropertyAccess(state, "sent"), 
+            /*typeArguments*/ undefined, []), location);
         }
         /**
          * Emits an empty instruction.
@@ -53243,17 +63851,13 @@ var ts;
             currentExceptionBlock = undefined;
             withBlockStack = undefined;
             var buildResult = buildStatements();
-            return ts.createCall(ts.createHelperName(currentSourceFile.externalHelpersModuleName, "__generator"), 
-            /*typeArguments*/ undefined, [
-                ts.createThis(),
-                ts.setEmitFlags(ts.createFunctionExpression(
-                /*asteriskToken*/ undefined, 
-                /*name*/ undefined, 
-                /*typeParameters*/ undefined, [ts.createParameter(state)], 
-                /*type*/ undefined, ts.createBlock(buildResult, 
-                /*location*/ undefined, 
-                /*multiLine*/ buildResult.length > 0)), 4194304 /* ReuseTempVariableScope */)
-            ]);
+            return createGeneratorHelper(context, ts.setEmitFlags(ts.createFunctionExpression(
+            /*modifiers*/ undefined, 
+            /*asteriskToken*/ undefined, 
+            /*name*/ undefined, 
+            /*typeParameters*/ undefined, [ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, state)], 
+            /*type*/ undefined, ts.createBlock(buildResult, 
+            /*multiLine*/ buildResult.length > 0)), 524288 /* ReuseTempVariableScope */));
         }
         /**
          * Builds the statements for the generator function body.
@@ -53523,7 +64127,7 @@ var ts;
          * @param operationLocation The source map location for the operation.
          */
         function writeAssign(left, right, operationLocation) {
-            writeStatement(ts.createStatement(ts.createAssignment(left, right), operationLocation));
+            writeStatement(ts.setTextRange(ts.createStatement(ts.createAssignment(left, right)), operationLocation));
         }
         /**
          * Writes a Throw operation to the current label's statement list.
@@ -53534,7 +64138,7 @@ var ts;
         function writeThrow(expression, operationLocation) {
             lastOperationWasAbrupt = true;
             lastOperationWasCompletion = true;
-            writeStatement(ts.createThrow(expression, operationLocation));
+            writeStatement(ts.setTextRange(ts.createThrow(expression), operationLocation));
         }
         /**
          * Writes a Return operation to the current label's statement list.
@@ -53545,9 +64149,9 @@ var ts;
         function writeReturn(expression, operationLocation) {
             lastOperationWasAbrupt = true;
             lastOperationWasCompletion = true;
-            writeStatement(ts.createReturn(ts.createArrayLiteral(expression
+            writeStatement(ts.setEmitFlags(ts.setTextRange(ts.createReturn(ts.createArrayLiteral(expression
                 ? [createInstruction(2 /* Return */), expression]
-                : [createInstruction(2 /* Return */)]), operationLocation));
+                : [createInstruction(2 /* Return */)])), operationLocation), 384 /* NoTokenSourceMaps */));
         }
         /**
          * Writes a Break operation to the current label's statement list.
@@ -53557,10 +64161,10 @@ var ts;
          */
         function writeBreak(label, operationLocation) {
             lastOperationWasAbrupt = true;
-            writeStatement(ts.createReturn(ts.createArrayLiteral([
+            writeStatement(ts.setEmitFlags(ts.setTextRange(ts.createReturn(ts.createArrayLiteral([
                 createInstruction(3 /* Break */),
                 createLabel(label)
-            ]), operationLocation));
+            ])), operationLocation), 384 /* NoTokenSourceMaps */));
         }
         /**
          * Writes a BreakWhenTrue operation to the current label's statement list.
@@ -53570,10 +64174,10 @@ var ts;
          * @param operationLocation The source map location for the operation.
          */
         function writeBreakWhenTrue(label, condition, operationLocation) {
-            writeStatement(ts.createIf(condition, ts.createReturn(ts.createArrayLiteral([
+            writeStatement(ts.setEmitFlags(ts.createIf(condition, ts.setEmitFlags(ts.setTextRange(ts.createReturn(ts.createArrayLiteral([
                 createInstruction(3 /* Break */),
                 createLabel(label)
-            ]), operationLocation)));
+            ])), operationLocation), 384 /* NoTokenSourceMaps */)), 1 /* SingleLine */));
         }
         /**
          * Writes a BreakWhenFalse operation to the current label's statement list.
@@ -53583,10 +64187,10 @@ var ts;
          * @param operationLocation The source map location for the operation.
          */
         function writeBreakWhenFalse(label, condition, operationLocation) {
-            writeStatement(ts.createIf(ts.createLogicalNot(condition), ts.createReturn(ts.createArrayLiteral([
+            writeStatement(ts.setEmitFlags(ts.createIf(ts.createLogicalNot(condition), ts.setEmitFlags(ts.setTextRange(ts.createReturn(ts.createArrayLiteral([
                 createInstruction(3 /* Break */),
                 createLabel(label)
-            ]), operationLocation)));
+            ])), operationLocation), 384 /* NoTokenSourceMaps */)), 1 /* SingleLine */));
         }
         /**
          * Writes a Yield operation to the current label's statement list.
@@ -53596,9 +64200,9 @@ var ts;
          */
         function writeYield(expression, operationLocation) {
             lastOperationWasAbrupt = true;
-            writeStatement(ts.createReturn(ts.createArrayLiteral(expression
+            writeStatement(ts.setEmitFlags(ts.setTextRange(ts.createReturn(ts.createArrayLiteral(expression
                 ? [createInstruction(4 /* Yield */), expression]
-                : [createInstruction(4 /* Yield */)]), operationLocation));
+                : [createInstruction(4 /* Yield */)])), operationLocation), 384 /* NoTokenSourceMaps */));
         }
         /**
          * Writes a YieldStar instruction to the current label's statement list.
@@ -53608,10 +64212,10 @@ var ts;
          */
         function writeYieldStar(expression, operationLocation) {
             lastOperationWasAbrupt = true;
-            writeStatement(ts.createReturn(ts.createArrayLiteral([
+            writeStatement(ts.setEmitFlags(ts.setTextRange(ts.createReturn(ts.createArrayLiteral([
                 createInstruction(5 /* YieldStar */),
                 expression
-            ]), operationLocation));
+            ])), operationLocation), 384 /* NoTokenSourceMaps */));
         }
         /**
          * Writes an Endfinally instruction to the current label's statement list.
@@ -53624,21 +64228,204 @@ var ts;
         }
     }
     ts.transformGenerators = transformGenerators;
-    var _a;
+    function createGeneratorHelper(context, body) {
+        context.requestEmitHelper(generatorHelper);
+        return ts.createCall(ts.getHelperName("__generator"), 
+        /*typeArguments*/ undefined, [ts.createThis(), body]);
+    }
+    // The __generator helper is used by down-level transformations to emulate the runtime
+    // semantics of an ES2015 generator function. When called, this helper returns an
+    // object that implements the Iterator protocol, in that it has `next`, `return`, and
+    // `throw` methods that step through the generator when invoked.
+    //
+    // parameters:
+    //  thisArg  The value to use as the `this` binding for the transformed generator body.
+    //  body     A function that acts as the transformed generator body.
+    //
+    // variables:
+    //  _       Persistent state for the generator that is shared between the helper and the
+    //          generator body. The state object has the following members:
+    //            sent() - A method that returns or throws the current completion value.
+    //            label  - The next point at which to resume evaluation of the generator body.
+    //            trys   - A stack of protected regions (try/catch/finally blocks).
+    //            ops    - A stack of pending instructions when inside of a finally block.
+    //  f       A value indicating whether the generator is executing.
+    //  y       An iterator to delegate for a yield*.
+    //  t       A temporary variable that holds one of the following values (note that these
+    //          cases do not overlap):
+    //          - The completion value when resuming from a `yield` or `yield*`.
+    //          - The error value for a catch block.
+    //          - The current protected region (array of try/catch/finally/end labels).
+    //          - The verb (`next`, `throw`, or `return` method) to delegate to the expression
+    //            of a `yield*`.
+    //          - The result of evaluating the verb delegated to the expression of a `yield*`.
+    //
+    // functions:
+    //  verb(n)     Creates a bound callback to the `step` function for opcode `n`.
+    //  step(op)    Evaluates opcodes in a generator body until execution is suspended or
+    //              completed.
+    //
+    // The __generator helper understands a limited set of instructions:
+    //  0: next(value?)     - Start or resume the generator with the specified value.
+    //  1: throw(error)     - Resume the generator with an exception. If the generator is
+    //                        suspended inside of one or more protected regions, evaluates
+    //                        any intervening finally blocks between the current label and
+    //                        the nearest catch block or function boundary. If uncaught, the
+    //                        exception is thrown to the caller.
+    //  2: return(value?)   - Resume the generator as if with a return. If the generator is
+    //                        suspended inside of one or more protected regions, evaluates any
+    //                        intervening finally blocks.
+    //  3: break(label)     - Jump to the specified label. If the label is outside of the
+    //                        current protected region, evaluates any intervening finally
+    //                        blocks.
+    //  4: yield(value?)    - Yield execution to the caller with an optional value. When
+    //                        resumed, the generator will continue at the next label.
+    //  5: yield*(value)    - Delegates evaluation to the supplied iterator. When
+    //                        delegation completes, the generator will continue at the next
+    //                        label.
+    //  6: catch(error)     - Handles an exception thrown from within the generator body. If
+    //                        the current label is inside of one or more protected regions,
+    //                        evaluates any intervening finally blocks between the current
+    //                        label and the nearest catch block or function boundary. If
+    //                        uncaught, the exception is thrown to the caller.
+    //  7: endfinally       - Ends a finally block, resuming the last instruction prior to
+    //                        entering a finally block.
+    //
+    // For examples of how these are used, see the comments in ./transformers/generators.ts
+    var generatorHelper = {
+        name: "typescript:generator",
+        scoped: false,
+        priority: 6,
+        text: "\n            var __generator = (this && this.__generator) || function (thisArg, body) {\n                var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;\n                return g = { next: verb(0), \"throw\": verb(1), \"return\": verb(2) }, typeof Symbol === \"function\" && (g[Symbol.iterator] = function() { return this; }), g;\n                function verb(n) { return function (v) { return step([n, v]); }; }\n                function step(op) {\n                    if (f) throw new TypeError(\"Generator is already executing.\");\n                    while (_) try {\n                        if (f = 1, y && (t = y[op[0] & 2 ? \"return\" : op[0] ? \"throw\" : \"next\"]) && !(t = t.call(y, op[1])).done) return t;\n                        if (y = 0, t) op = [0, t.value];\n                        switch (op[0]) {\n                            case 0: case 1: t = op; break;\n                            case 4: _.label++; return { value: op[1], done: false };\n                            case 5: _.label++; y = op[1]; op = [0]; continue;\n                            case 7: op = _.ops.pop(); _.trys.pop(); continue;\n                            default:\n                                if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }\n                                if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }\n                                if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }\n                                if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }\n                                if (t[2]) _.ops.pop();\n                                _.trys.pop(); continue;\n                        }\n                        op = body.call(thisArg, _);\n                    } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }\n                    if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };\n                }\n            };"
+    };
+})(ts || (ts = {}));
+/// <reference path="../factory.ts" />
+/// <reference path="../visitor.ts" />
+/*@internal*/
+var ts;
+(function (ts) {
+    /**
+     * Transforms ES5 syntax into ES3 syntax.
+     *
+     * @param context Context and state information for the transformation.
+     */
+    function transformES5(context) {
+        var compilerOptions = context.getCompilerOptions();
+        // enable emit notification only if using --jsx preserve or react-native
+        var previousOnEmitNode;
+        var noSubstitution;
+        if (compilerOptions.jsx === 1 /* Preserve */ || compilerOptions.jsx === 3 /* ReactNative */) {
+            previousOnEmitNode = context.onEmitNode;
+            context.onEmitNode = onEmitNode;
+            context.enableEmitNotification(251 /* JsxOpeningElement */);
+            context.enableEmitNotification(252 /* JsxClosingElement */);
+            context.enableEmitNotification(250 /* JsxSelfClosingElement */);
+            noSubstitution = [];
+        }
+        var previousOnSubstituteNode = context.onSubstituteNode;
+        context.onSubstituteNode = onSubstituteNode;
+        context.enableSubstitution(179 /* PropertyAccessExpression */);
+        context.enableSubstitution(261 /* PropertyAssignment */);
+        return transformSourceFile;
+        /**
+         * Transforms an ES5 source file to ES3.
+         *
+         * @param node A SourceFile
+         */
+        function transformSourceFile(node) {
+            return node;
+        }
+        /**
+         * Called by the printer just before a node is printed.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to emit.
+         * @param emitCallback A callback used to emit the node.
+         */
+        function onEmitNode(hint, node, emitCallback) {
+            switch (node.kind) {
+                case 251 /* JsxOpeningElement */:
+                case 252 /* JsxClosingElement */:
+                case 250 /* JsxSelfClosingElement */:
+                    var tagName = node.tagName;
+                    noSubstitution[ts.getOriginalNodeId(tagName)] = true;
+                    break;
+            }
+            previousOnEmitNode(hint, node, emitCallback);
+        }
+        /**
+         * Hooks node substitutions.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to substitute.
+         */
+        function onSubstituteNode(hint, node) {
+            if (node.id && noSubstitution && noSubstitution[node.id]) {
+                return previousOnSubstituteNode(hint, node);
+            }
+            node = previousOnSubstituteNode(hint, node);
+            if (ts.isPropertyAccessExpression(node)) {
+                return substitutePropertyAccessExpression(node);
+            }
+            else if (ts.isPropertyAssignment(node)) {
+                return substitutePropertyAssignment(node);
+            }
+            return node;
+        }
+        /**
+         * Substitutes a PropertyAccessExpression whose name is a reserved word.
+         *
+         * @param node A PropertyAccessExpression
+         */
+        function substitutePropertyAccessExpression(node) {
+            var literalName = trySubstituteReservedName(node.name);
+            if (literalName) {
+                return ts.setTextRange(ts.createElementAccess(node.expression, literalName), node);
+            }
+            return node;
+        }
+        /**
+         * Substitutes a PropertyAssignment whose name is a reserved word.
+         *
+         * @param node A PropertyAssignment
+         */
+        function substitutePropertyAssignment(node) {
+            var literalName = ts.isIdentifier(node.name) && trySubstituteReservedName(node.name);
+            if (literalName) {
+                return ts.updatePropertyAssignment(node, literalName, node.initializer);
+            }
+            return node;
+        }
+        /**
+         * If an identifier name is a reserved word, returns a string literal for the name.
+         *
+         * @param name An Identifier
+         */
+        function trySubstituteReservedName(name) {
+            var token = name.originalKeywordKind || (ts.nodeIsSynthesized(name) ? ts.stringToToken(name.text) : undefined);
+            if (token >= 72 /* FirstReservedWord */ && token <= 107 /* LastReservedWord */) {
+                return ts.setTextRange(ts.createLiteral(name), name);
+            }
+            return undefined;
+        }
+    }
+    ts.transformES5 = transformES5;
 })(ts || (ts = {}));
 /// <reference path="../../factory.ts" />
 /// <reference path="../../visitor.ts" />
+/// <reference path="../destructuring.ts" />
 /*@internal*/
 var ts;
 (function (ts) {
     function transformModule(context) {
-        var transformModuleDelegates = ts.createMap((_a = {},
-            _a[ts.ModuleKind.None] = transformCommonJSModule,
-            _a[ts.ModuleKind.CommonJS] = transformCommonJSModule,
-            _a[ts.ModuleKind.AMD] = transformAMDModule,
-            _a[ts.ModuleKind.UMD] = transformUMDModule,
-            _a));
-        var startLexicalEnvironment = context.startLexicalEnvironment, endLexicalEnvironment = context.endLexicalEnvironment, hoistVariableDeclaration = context.hoistVariableDeclaration;
+        function getTransformModuleDelegate(moduleKind) {
+            switch (moduleKind) {
+                case ts.ModuleKind.AMD: return transformAMDModule;
+                case ts.ModuleKind.UMD: return transformUMDModule;
+                default: return transformCommonJSModule;
+            }
+        }
+        var startLexicalEnvironment = context.startLexicalEnvironment, endLexicalEnvironment = context.endLexicalEnvironment;
         var compilerOptions = context.getCompilerOptions();
         var resolver = context.getEmitResolver();
         var host = context.getEmitHost();
@@ -53648,21 +64435,18 @@ var ts;
         var previousOnEmitNode = context.onEmitNode;
         context.onSubstituteNode = onSubstituteNode;
         context.onEmitNode = onEmitNode;
-        context.enableSubstitution(69 /* Identifier */);
-        context.enableSubstitution(187 /* BinaryExpression */);
-        context.enableSubstitution(185 /* PrefixUnaryExpression */);
-        context.enableSubstitution(186 /* PostfixUnaryExpression */);
-        context.enableSubstitution(254 /* ShorthandPropertyAssignment */);
-        context.enableEmitNotification(256 /* SourceFile */);
-        var currentSourceFile;
-        var externalImports;
-        var exportSpecifiers;
-        var exportEquals;
-        var bindingNameExportSpecifiersMap;
-        // Subset of exportSpecifiers that is a binding-name.
-        // This is to reduce amount of memory we have to keep around even after we done with module-transformer
-        var bindingNameExportSpecifiersForFileMap = ts.createMap();
-        var hasExportStarsToExportValues;
+        context.enableSubstitution(71 /* Identifier */); // Substitutes expression identifiers with imported/exported symbols.
+        context.enableSubstitution(194 /* BinaryExpression */); // Substitutes assignments to exported symbols.
+        context.enableSubstitution(192 /* PrefixUnaryExpression */); // Substitutes updates to exported symbols.
+        context.enableSubstitution(193 /* PostfixUnaryExpression */); // Substitutes updates to exported symbols.
+        context.enableSubstitution(262 /* ShorthandPropertyAssignment */); // Substitutes shorthand property assignments for imported/exported symbols.
+        context.enableEmitNotification(265 /* SourceFile */); // Restore state when substituting nodes in a file.
+        var moduleInfoMap = []; // The ExternalModuleInfo for each file.
+        var deferredExports = []; // Exports to defer until an EndOfDeclarationMarker is found.
+        var currentSourceFile; // The current file.
+        var currentModuleInfo; // The ExternalModuleInfo for the current file.
+        var noSubstitution; // Set of nodes for which substitution rules should be ignored.
+        var needUMDDynamicImportHelper;
         return transformSourceFile;
         /**
          * Transforms the module aspects of a SourceFile.
@@ -53670,26 +64454,25 @@ var ts;
          * @param node The SourceFile node.
          */
         function transformSourceFile(node) {
-            if (ts.isDeclarationFile(node)) {
+            if (node.isDeclarationFile || !(ts.isExternalModule(node) || compilerOptions.isolatedModules || node.transformFlags & 67108864 /* ContainsDynamicImport */)) {
                 return node;
             }
-            if (ts.isExternalModule(node) || compilerOptions.isolatedModules) {
-                currentSourceFile = node;
-                // Collect information about the external module.
-                (_a = ts.collectExternalModuleInfo(node, resolver), externalImports = _a.externalImports, exportSpecifiers = _a.exportSpecifiers, exportEquals = _a.exportEquals, hasExportStarsToExportValues = _a.hasExportStarsToExportValues, _a);
-                // Perform the transformation.
-                var transformModule_1 = transformModuleDelegates[moduleKind] || transformModuleDelegates[ts.ModuleKind.None];
-                var updated = transformModule_1(node);
-                ts.aggregateTransformFlags(updated);
-                currentSourceFile = undefined;
-                externalImports = undefined;
-                exportSpecifiers = undefined;
-                exportEquals = undefined;
-                hasExportStarsToExportValues = false;
-                return updated;
+            currentSourceFile = node;
+            currentModuleInfo = ts.collectExternalModuleInfo(node, resolver, compilerOptions);
+            moduleInfoMap[ts.getOriginalNodeId(node)] = currentModuleInfo;
+            // Perform the transformation.
+            var transformModule = getTransformModuleDelegate(moduleKind);
+            var updated = transformModule(node);
+            currentSourceFile = undefined;
+            currentModuleInfo = undefined;
+            needUMDDynamicImportHelper = false;
+            return ts.aggregateTransformFlags(updated);
+        }
+        function shouldEmitUnderscoreUnderscoreESModule() {
+            if (!currentModuleInfo.exportEquals && ts.isExternalModule(currentSourceFile)) {
+                return true;
             }
-            return node;
-            var _a;
+            return false;
         }
         /**
          * Transforms a SourceFile into a CommonJS module.
@@ -53699,14 +64482,22 @@ var ts;
         function transformCommonJSModule(node) {
             startLexicalEnvironment();
             var statements = [];
-            var statementOffset = ts.addPrologueDirectives(statements, node.statements, /*ensureUseStrict*/ !compilerOptions.noImplicitUseStrict, visitor);
-            ts.addRange(statements, ts.visitNodes(node.statements, visitor, ts.isStatement, statementOffset));
-            ts.addRange(statements, endLexicalEnvironment());
+            var ensureUseStrict = compilerOptions.alwaysStrict || (!compilerOptions.noImplicitUseStrict && ts.isExternalModule(currentSourceFile));
+            var statementOffset = ts.addPrologue(statements, node.statements, ensureUseStrict, sourceElementVisitor);
+            if (shouldEmitUnderscoreUnderscoreESModule()) {
+                ts.append(statements, createUnderscoreUnderscoreESModule());
+            }
+            ts.append(statements, ts.visitNode(currentModuleInfo.externalHelpersImportDeclaration, sourceElementVisitor, ts.isStatement));
+            ts.addRange(statements, ts.visitNodes(node.statements, sourceElementVisitor, ts.isStatement, statementOffset));
             addExportEqualsIfNeeded(statements, /*emitAsReturn*/ false);
-            var updated = updateSourceFile(node, statements);
-            if (hasExportStarsToExportValues) {
-                ts.setEmitFlags(updated, 2 /* EmitExportStar */ | ts.getEmitFlags(node));
+            ts.addRange(statements, endLexicalEnvironment());
+            var updated = ts.updateSourceFileNode(node, ts.setTextRange(ts.createNodeArray(statements), node.statements));
+            if (currentModuleInfo.hasExportStarsToExportValues && !compilerOptions.importHelpers) {
+                // If we have any `export * from ...` declarations
+                // we need to inform the emitter to add the __export helper.
+                ts.addEmitHelper(updated, exportStarHelper);
             }
+            ts.addEmitHelpers(updated, context.readEmitHelpers());
             return updated;
         }
         /**
@@ -53717,27 +64508,6 @@ var ts;
         function transformAMDModule(node) {
             var define = ts.createIdentifier("define");
             var moduleName = ts.tryGetModuleNameFromFile(node, host, compilerOptions);
-            return transformAsynchronousModule(node, define, moduleName, /*includeNonAmdDependencies*/ true);
-        }
-        /**
-         * Transforms a SourceFile into a UMD module.
-         *
-         * @param node The SourceFile node.
-         */
-        function transformUMDModule(node) {
-            var define = ts.createIdentifier("define");
-            ts.setEmitFlags(define, 16 /* UMDDefine */);
-            return transformAsynchronousModule(node, define, /*moduleName*/ undefined, /*includeNonAmdDependencies*/ false);
-        }
-        /**
-         * Transforms a SourceFile into an AMD or UMD module.
-         *
-         * @param node The SourceFile node.
-         * @param define The expression used to define the module.
-         * @param moduleName An expression for the module name, if available.
-         * @param includeNonAmdDependencies A value indicating whether to incldue any non-AMD dependencies.
-         */
-        function transformAsynchronousModule(node, define, moduleName, includeNonAmdDependencies) {
             // An AMD define function has the following shape:
             //
             //     define(id?, dependencies?, factory);
@@ -53758,11 +64528,11 @@ var ts;
             //     /// <amd-dependency path= "a.css" />
             //
             // we need to add modules without alias names to the end of the dependencies list
-            var _a = collectAsynchronousDependencies(node, includeNonAmdDependencies), aliasedModuleNames = _a.aliasedModuleNames, unaliasedModuleNames = _a.unaliasedModuleNames, importAliasNames = _a.importAliasNames;
+            var _a = collectAsynchronousDependencies(node, /*includeNonAmdDependencies*/ true), aliasedModuleNames = _a.aliasedModuleNames, unaliasedModuleNames = _a.unaliasedModuleNames, importAliasNames = _a.importAliasNames;
             // Create an updated SourceFile:
             //
             //     define(moduleName?, ["module1", "module2"], function ...
-            return updateSourceFile(node, [
+            return ts.updateSourceFileNode(node, ts.setTextRange(ts.createNodeArray([
                 ts.createStatement(ts.createCall(define, 
                 /*typeArguments*/ undefined, (moduleName ? [moduleName] : []).concat([
                     // Add the dependency array argument:
@@ -53776,15 +64546,134 @@ var ts;
                     //
                     //     function (require, exports, module1, module2) ...
                     ts.createFunctionExpression(
+                    /*modifiers*/ undefined, 
                     /*asteriskToken*/ undefined, 
                     /*name*/ undefined, 
                     /*typeParameters*/ undefined, [
-                        ts.createParameter("require"),
-                        ts.createParameter("exports")
+                        ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, "require"),
+                        ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, "exports")
                     ].concat(importAliasNames), 
                     /*type*/ undefined, transformAsynchronousModuleBody(node))
                 ])))
-            ]);
+            ]), 
+            /*location*/ node.statements));
+        }
+        /**
+         * Transforms a SourceFile into a UMD module.
+         *
+         * @param node The SourceFile node.
+         */
+        function transformUMDModule(node) {
+            var _a = collectAsynchronousDependencies(node, /*includeNonAmdDependencies*/ false), aliasedModuleNames = _a.aliasedModuleNames, unaliasedModuleNames = _a.unaliasedModuleNames, importAliasNames = _a.importAliasNames;
+            var umdHeader = ts.createFunctionExpression(
+            /*modifiers*/ undefined, 
+            /*asteriskToken*/ undefined, 
+            /*name*/ undefined, 
+            /*typeParameters*/ undefined, [ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, "factory")], 
+            /*type*/ undefined, ts.setTextRange(ts.createBlock([
+                ts.createIf(ts.createLogicalAnd(ts.createTypeCheck(ts.createIdentifier("module"), "object"), ts.createTypeCheck(ts.createPropertyAccess(ts.createIdentifier("module"), "exports"), "object")), ts.createBlock([
+                    ts.createVariableStatement(
+                    /*modifiers*/ undefined, [
+                        ts.createVariableDeclaration("v", 
+                        /*type*/ undefined, ts.createCall(ts.createIdentifier("factory"), 
+                        /*typeArguments*/ undefined, [
+                            ts.createIdentifier("require"),
+                            ts.createIdentifier("exports")
+                        ]))
+                    ]),
+                    ts.setEmitFlags(ts.createIf(ts.createStrictInequality(ts.createIdentifier("v"), ts.createIdentifier("undefined")), ts.createStatement(ts.createAssignment(ts.createPropertyAccess(ts.createIdentifier("module"), "exports"), ts.createIdentifier("v")))), 1 /* SingleLine */)
+                ]), ts.createIf(ts.createLogicalAnd(ts.createTypeCheck(ts.createIdentifier("define"), "function"), ts.createPropertyAccess(ts.createIdentifier("define"), "amd")), ts.createBlock([
+                    ts.createStatement(ts.createCall(ts.createIdentifier("define"), 
+                    /*typeArguments*/ undefined, [
+                        ts.createArrayLiteral([
+                            ts.createLiteral("require"),
+                            ts.createLiteral("exports")
+                        ].concat(aliasedModuleNames, unaliasedModuleNames)),
+                        ts.createIdentifier("factory")
+                    ]))
+                ])))
+            ], 
+            /*multiLine*/ true), 
+            /*location*/ undefined));
+            // Create an updated SourceFile:
+            //
+            //  (function (factory) {
+            //      if (typeof module === "object" && typeof module.exports === "object") {
+            //          var v = factory(require, exports);
+            //          if (v !== undefined) module.exports = v;
+            //      }
+            //      else if (typeof define === 'function' && define.amd) {
+            //          define(["require", "exports"], factory);
+            //      }
+            //  })(function ...)
+            return ts.updateSourceFileNode(node, ts.setTextRange(ts.createNodeArray([
+                ts.createStatement(ts.createCall(umdHeader, 
+                /*typeArguments*/ undefined, [
+                    // Add the module body function argument:
+                    //
+                    //     function (require, exports) ...
+                    ts.createFunctionExpression(
+                    /*modifiers*/ undefined, 
+                    /*asteriskToken*/ undefined, 
+                    /*name*/ undefined, 
+                    /*typeParameters*/ undefined, [
+                        ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, "require"),
+                        ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, "exports")
+                    ].concat(importAliasNames), 
+                    /*type*/ undefined, transformAsynchronousModuleBody(node))
+                ]))
+            ]), 
+            /*location*/ node.statements));
+        }
+        /**
+         * Collect the additional asynchronous dependencies for the module.
+         *
+         * @param node The source file.
+         * @param includeNonAmdDependencies A value indicating whether to include non-AMD dependencies.
+         */
+        function collectAsynchronousDependencies(node, includeNonAmdDependencies) {
+            // names of modules with corresponding parameter in the factory function
+            var aliasedModuleNames = [];
+            // names of modules with no corresponding parameters in factory function
+            var unaliasedModuleNames = [];
+            // names of the parameters in the factory function; these
+            // parameters need to match the indexes of the corresponding
+            // module names in aliasedModuleNames.
+            var importAliasNames = [];
+            // Fill in amd-dependency tags
+            for (var _i = 0, _a = node.amdDependencies; _i < _a.length; _i++) {
+                var amdDependency = _a[_i];
+                if (amdDependency.name) {
+                    aliasedModuleNames.push(ts.createLiteral(amdDependency.path));
+                    importAliasNames.push(ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, amdDependency.name));
+                }
+                else {
+                    unaliasedModuleNames.push(ts.createLiteral(amdDependency.path));
+                }
+            }
+            for (var _b = 0, _c = currentModuleInfo.externalImports; _b < _c.length; _b++) {
+                var importNode = _c[_b];
+                // Find the name of the external module
+                var externalModuleName = ts.getExternalModuleNameLiteral(importNode, currentSourceFile, host, resolver, compilerOptions);
+                // Find the name of the module alias, if there is one
+                var importAliasName = ts.getLocalNameForExternalImport(importNode, currentSourceFile);
+                // It is possible that externalModuleName is undefined if it is not string literal.
+                // This can happen in the invalid import syntax.
+                // E.g : "import * from alias from 'someLib';"
+                if (externalModuleName) {
+                    if (includeNonAmdDependencies && importAliasName) {
+                        // Set emitFlags on the name of the classDeclaration
+                        // This is so that when printer will not substitute the identifier
+                        ts.setEmitFlags(importAliasName, 4 /* NoSubstitution */);
+                        aliasedModuleNames.push(externalModuleName);
+                        importAliasNames.push(ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, importAliasName));
+                    }
+                    else {
+                        unaliasedModuleNames.push(externalModuleName);
+                    }
+                }
+            }
+            return { aliasedModuleNames: aliasedModuleNames, unaliasedModuleNames: unaliasedModuleNames, importAliasNames: importAliasNames };
         }
         /**
          * Transforms a SourceFile into an AMD or UMD module body.
@@ -53794,83 +64683,175 @@ var ts;
         function transformAsynchronousModuleBody(node) {
             startLexicalEnvironment();
             var statements = [];
-            var statementOffset = ts.addPrologueDirectives(statements, node.statements, /*ensureUseStrict*/ !compilerOptions.noImplicitUseStrict, visitor);
+            var statementOffset = ts.addPrologue(statements, node.statements, /*ensureUseStrict*/ !compilerOptions.noImplicitUseStrict, sourceElementVisitor);
+            if (shouldEmitUnderscoreUnderscoreESModule()) {
+                ts.append(statements, createUnderscoreUnderscoreESModule());
+            }
             // Visit each statement of the module body.
-            ts.addRange(statements, ts.visitNodes(node.statements, visitor, ts.isStatement, statementOffset));
+            ts.append(statements, ts.visitNode(currentModuleInfo.externalHelpersImportDeclaration, sourceElementVisitor, ts.isStatement));
+            ts.addRange(statements, ts.visitNodes(node.statements, sourceElementVisitor, ts.isStatement, statementOffset));
+            // Append the 'export =' statement if provided.
+            addExportEqualsIfNeeded(statements, /*emitAsReturn*/ true);
             // End the lexical environment for the module body
             // and merge any new lexical declarations.
             ts.addRange(statements, endLexicalEnvironment());
-            // Append the 'export =' statement if provided.
-            addExportEqualsIfNeeded(statements, /*emitAsReturn*/ true);
-            var body = ts.createBlock(statements, /*location*/ undefined, /*multiLine*/ true);
-            if (hasExportStarsToExportValues) {
+            var body = ts.createBlock(statements, /*multiLine*/ true);
+            if (currentModuleInfo.hasExportStarsToExportValues && !compilerOptions.importHelpers) {
                 // If we have any `export * from ...` declarations
                 // we need to inform the emitter to add the __export helper.
-                ts.setEmitFlags(body, 2 /* EmitExportStar */);
+                ts.addEmitHelper(body, exportStarHelper);
+            }
+            if (needUMDDynamicImportHelper) {
+                ts.addEmitHelper(body, dynamicImportUMDHelper);
             }
             return body;
         }
+        /**
+         * Adds the down-level representation of `export=` to the statement list if one exists
+         * in the source file.
+         *
+         * @param statements The Statement list to modify.
+         * @param emitAsReturn A value indicating whether to emit the `export=` statement as a
+         * return statement.
+         */
         function addExportEqualsIfNeeded(statements, emitAsReturn) {
-            if (exportEquals && resolver.isValueAliasDeclaration(exportEquals)) {
+            if (currentModuleInfo.exportEquals) {
                 if (emitAsReturn) {
-                    var statement = ts.createReturn(exportEquals.expression, 
-                    /*location*/ exportEquals);
-                    ts.setEmitFlags(statement, 12288 /* NoTokenSourceMaps */ | 49152 /* NoComments */);
+                    var statement = ts.createReturn(currentModuleInfo.exportEquals.expression);
+                    ts.setTextRange(statement, currentModuleInfo.exportEquals);
+                    ts.setEmitFlags(statement, 384 /* NoTokenSourceMaps */ | 1536 /* NoComments */);
                     statements.push(statement);
                 }
                 else {
-                    var statement = ts.createStatement(ts.createAssignment(ts.createPropertyAccess(ts.createIdentifier("module"), "exports"), exportEquals.expression), 
-                    /*location*/ exportEquals);
-                    ts.setEmitFlags(statement, 49152 /* NoComments */);
+                    var statement = ts.createStatement(ts.createAssignment(ts.createPropertyAccess(ts.createIdentifier("module"), "exports"), currentModuleInfo.exportEquals.expression));
+                    ts.setTextRange(statement, currentModuleInfo.exportEquals);
+                    ts.setEmitFlags(statement, 1536 /* NoComments */);
                     statements.push(statement);
                 }
             }
         }
+        //
+        // Top-Level Source Element Visitors
+        //
         /**
          * Visits a node at the top level of the source file.
          *
-         * @param node The node.
+         * @param node The node to visit.
          */
-        function visitor(node) {
+        function sourceElementVisitor(node) {
             switch (node.kind) {
-                case 230 /* ImportDeclaration */:
+                case 238 /* ImportDeclaration */:
                     return visitImportDeclaration(node);
-                case 229 /* ImportEqualsDeclaration */:
+                case 237 /* ImportEqualsDeclaration */:
                     return visitImportEqualsDeclaration(node);
-                case 236 /* ExportDeclaration */:
+                case 244 /* ExportDeclaration */:
                     return visitExportDeclaration(node);
-                case 235 /* ExportAssignment */:
+                case 243 /* ExportAssignment */:
                     return visitExportAssignment(node);
-                case 200 /* VariableStatement */:
+                case 208 /* VariableStatement */:
                     return visitVariableStatement(node);
-                case 220 /* FunctionDeclaration */:
+                case 228 /* FunctionDeclaration */:
                     return visitFunctionDeclaration(node);
-                case 221 /* ClassDeclaration */:
+                case 229 /* ClassDeclaration */:
                     return visitClassDeclaration(node);
-                case 202 /* ExpressionStatement */:
-                    return visitExpressionStatement(node);
+                case 299 /* MergeDeclarationMarker */:
+                    return visitMergeDeclarationMarker(node);
+                case 300 /* EndOfDeclarationMarker */:
+                    return visitEndOfDeclarationMarker(node);
                 default:
-                    // This visitor does not descend into the tree, as export/import statements
-                    // are only transformed at the top level of a file.
-                    return node;
+                    return ts.visitEachChild(node, importCallExpressionVisitor, context);
+            }
+        }
+        function importCallExpressionVisitor(node) {
+            // This visitor does not need to descend into the tree if there is no dynamic import,
+            // as export/import statements are only transformed at the top level of a file.
+            if (!(node.transformFlags & 67108864 /* ContainsDynamicImport */)) {
+                return node;
+            }
+            if (ts.isImportCall(node)) {
+                return visitImportCallExpression(node);
+            }
+            else {
+                return ts.visitEachChild(node, importCallExpressionVisitor, context);
+            }
+        }
+        function visitImportCallExpression(node) {
+            switch (compilerOptions.module) {
+                case ts.ModuleKind.AMD:
+                    return transformImportCallExpressionAMD(node);
+                case ts.ModuleKind.UMD:
+                    return transformImportCallExpressionUMD(node);
+                case ts.ModuleKind.CommonJS:
+                default:
+                    return transformImportCallExpressionCommonJS(node);
             }
         }
+        function transformImportCallExpressionUMD(node) {
+            // (function (factory) {
+            //      ... (regular UMD)
+            // }
+            // })(function (require, exports, useSyncRequire) {
+            //      "use strict";
+            //      Object.defineProperty(exports, "__esModule", { value: true });
+            //      var __syncRequire = typeof module === "object" && typeof module.exports === "object";
+            //      var __resolved = new Promise(function (resolve) { resolve(); });
+            //      .....
+            //      __syncRequire
+            //          ? __resolved.then(function () { return require(x); }) /*CommonJs Require*/
+            //          : new Promise(function (_a, _b) { require([x], _a, _b); }); /*Amd Require*/
+            // });
+            needUMDDynamicImportHelper = true;
+            return ts.createConditional(
+            /*condition*/ ts.createIdentifier("__syncRequire"), 
+            /*whenTrue*/ transformImportCallExpressionCommonJS(node), 
+            /*whenFalse*/ transformImportCallExpressionAMD(node));
+        }
+        function transformImportCallExpressionAMD(node) {
+            // improt("./blah")
+            // emit as
+            // define(["require", "exports", "blah"], function (require, exports) {
+            //     ...
+            //     new Promise(function (_a, _b) { require([x], _a, _b); }); /*Amd Require*/
+            // });
+            var resolve = ts.createUniqueName("resolve");
+            var reject = ts.createUniqueName("reject");
+            return ts.createNew(ts.createIdentifier("Promise"), 
+            /*typeArguments*/ undefined, [ts.createFunctionExpression(
+                /*modifiers*/ undefined, 
+                /*asteriskToken*/ undefined, 
+                /*name*/ undefined, 
+                /*typeParameters*/ undefined, [ts.createParameter(/*decorator*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, /*name*/ resolve),
+                    ts.createParameter(/*decorator*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, /*name*/ reject)], 
+                /*type*/ undefined, ts.createBlock([ts.createStatement(ts.createCall(ts.createIdentifier("require"), 
+                    /*typeArguments*/ undefined, [ts.createArrayLiteral([ts.firstOrUndefined(node.arguments) || ts.createOmittedExpression()]), resolve, reject]))]))]);
+        }
+        function transformImportCallExpressionCommonJS(node) {
+            // import("./blah")
+            // emit as
+            // Promise.resolve().then(function () { return require(x); }) /*CommonJs Require*/
+            // We have to wrap require in then callback so that require is done in asynchronously
+            // if we simply do require in resolve callback in Promise constructor. We will execute the loading immediately
+            return ts.createCall(ts.createPropertyAccess(ts.createCall(ts.createPropertyAccess(ts.createIdentifier("Promise"), "resolve"), /*typeArguments*/ undefined, /*argumentsArray*/ []), "then"), 
+            /*typeArguments*/ undefined, [ts.createFunctionExpression(
+                /*modifiers*/ undefined, 
+                /*asteriskToken*/ undefined, 
+                /*name*/ undefined, 
+                /*typeParameters*/ undefined, 
+                /*parameters*/ undefined, 
+                /*type*/ undefined, ts.createBlock([ts.createReturn(ts.createCall(ts.createIdentifier("require"), /*typeArguments*/ undefined, node.arguments))]))]);
+        }
         /**
          * Visits an ImportDeclaration node.
          *
-         * @param node The ImportDeclaration node.
+         * @param node The node to visit.
          */
         function visitImportDeclaration(node) {
-            if (!ts.contains(externalImports, node)) {
-                return undefined;
-            }
-            var statements = [];
+            var statements;
             var namespaceDeclaration = ts.getNamespaceDeclarationNode(node);
             if (moduleKind !== ts.ModuleKind.AMD) {
                 if (!node.importClause) {
                     // import "mod";
-                    statements.push(ts.createStatement(createRequireCall(node), 
-                    /*location*/ node));
+                    return ts.setTextRange(ts.createStatement(createRequireCall(node)), node);
                 }
                 else {
                     var variables = [];
@@ -53891,58 +64872,88 @@ var ts;
                             /*type*/ undefined, ts.getGeneratedNameForNode(node)));
                         }
                     }
-                    statements.push(ts.createVariableStatement(
-                    /*modifiers*/ undefined, ts.createConstDeclarationList(variables), 
+                    statements = ts.append(statements, ts.setTextRange(ts.createVariableStatement(
+                    /*modifiers*/ undefined, ts.createVariableDeclarationList(variables, languageVersion >= 2 /* ES2015 */ ? 2 /* Const */ : 0 /* None */)), 
                     /*location*/ node));
                 }
             }
             else if (namespaceDeclaration && ts.isDefaultImport(node)) {
                 // import d, * as n from "mod";
-                statements.push(ts.createVariableStatement(
+                statements = ts.append(statements, ts.createVariableStatement(
                 /*modifiers*/ undefined, ts.createVariableDeclarationList([
-                    ts.createVariableDeclaration(ts.getSynthesizedClone(namespaceDeclaration.name), 
-                    /*type*/ undefined, ts.getGeneratedNameForNode(node), 
+                    ts.setTextRange(ts.createVariableDeclaration(ts.getSynthesizedClone(namespaceDeclaration.name), 
+                    /*type*/ undefined, ts.getGeneratedNameForNode(node)), 
                     /*location*/ node)
-                ])));
+                ], languageVersion >= 2 /* ES2015 */ ? 2 /* Const */ : 0 /* None */)));
+            }
+            if (hasAssociatedEndOfDeclarationMarker(node)) {
+                // Defer exports until we encounter an EndOfDeclarationMarker node
+                var id = ts.getOriginalNodeId(node);
+                deferredExports[id] = appendExportsOfImportDeclaration(deferredExports[id], node);
+            }
+            else {
+                statements = appendExportsOfImportDeclaration(statements, node);
             }
-            addExportImportAssignments(statements, node);
             return ts.singleOrMany(statements);
         }
-        function visitImportEqualsDeclaration(node) {
-            if (!ts.contains(externalImports, node)) {
-                return undefined;
+        /**
+         * Creates a `require()` call to import an external module.
+         *
+         * @param importNode The declararation to import.
+         */
+        function createRequireCall(importNode) {
+            var moduleName = ts.getExternalModuleNameLiteral(importNode, currentSourceFile, host, resolver, compilerOptions);
+            var args = [];
+            if (moduleName) {
+                args.push(moduleName);
             }
-            // Set emitFlags on the name of the importEqualsDeclaration
-            // This is so the printer will not substitute the identifier
-            ts.setEmitFlags(node.name, 128 /* NoSubstitution */);
-            var statements = [];
+            return ts.createCall(ts.createIdentifier("require"), /*typeArguments*/ undefined, args);
+        }
+        /**
+         * Visits an ImportEqualsDeclaration node.
+         *
+         * @param node The node to visit.
+         */
+        function visitImportEqualsDeclaration(node) {
+            ts.Debug.assert(ts.isExternalModuleImportEqualsDeclaration(node), "import= for internal module references should be handled in an earlier transformer.");
+            var statements;
             if (moduleKind !== ts.ModuleKind.AMD) {
                 if (ts.hasModifier(node, 1 /* Export */)) {
-                    statements.push(ts.createStatement(createExportAssignment(node.name, createRequireCall(node)), 
-                    /*location*/ node));
+                    statements = ts.append(statements, ts.setTextRange(ts.createStatement(createExportExpression(node.name, createRequireCall(node))), node));
                 }
                 else {
-                    statements.push(ts.createVariableStatement(
+                    statements = ts.append(statements, ts.setTextRange(ts.createVariableStatement(
                     /*modifiers*/ undefined, ts.createVariableDeclarationList([
                         ts.createVariableDeclaration(ts.getSynthesizedClone(node.name), 
                         /*type*/ undefined, createRequireCall(node))
                     ], 
-                    /*location*/ undefined, 
-                    /*flags*/ languageVersion >= 2 /* ES6 */ ? 2 /* Const */ : 0 /* None */), 
-                    /*location*/ node));
+                    /*flags*/ languageVersion >= 2 /* ES2015 */ ? 2 /* Const */ : 0 /* None */)), node));
                 }
             }
             else {
                 if (ts.hasModifier(node, 1 /* Export */)) {
-                    statements.push(ts.createStatement(createExportAssignment(node.name, node.name), 
-                    /*location*/ node));
+                    statements = ts.append(statements, ts.setTextRange(ts.createStatement(createExportExpression(ts.getExportName(node), ts.getLocalName(node))), node));
                 }
             }
-            addExportImportAssignments(statements, node);
-            return statements;
+            if (hasAssociatedEndOfDeclarationMarker(node)) {
+                // Defer exports until we encounter an EndOfDeclarationMarker node
+                var id = ts.getOriginalNodeId(node);
+                deferredExports[id] = appendExportsOfImportEqualsDeclaration(deferredExports[id], node);
+            }
+            else {
+                statements = appendExportsOfImportEqualsDeclaration(statements, node);
+            }
+            return ts.singleOrMany(statements);
         }
+        /**
+         * Visits an ExportDeclaration node.
+         *
+         * @param The node to visit.
+         */
         function visitExportDeclaration(node) {
-            if (!ts.contains(externalImports, node)) {
+            if (!node.moduleSpecifier) {
+                // Elide export declarations with no module specifier as they are handled
+                // elsewhere.
                 return undefined;
             }
             var generatedName = ts.getGeneratedNameForNode(node);
@@ -53950,278 +64961,459 @@ var ts;
                 var statements = [];
                 // export { x, y } from "mod";
                 if (moduleKind !== ts.ModuleKind.AMD) {
-                    statements.push(ts.createVariableStatement(
+                    statements.push(ts.setTextRange(ts.createVariableStatement(
                     /*modifiers*/ undefined, ts.createVariableDeclarationList([
                         ts.createVariableDeclaration(generatedName, 
                         /*type*/ undefined, createRequireCall(node))
-                    ]), 
+                    ])), 
                     /*location*/ node));
                 }
                 for (var _i = 0, _a = node.exportClause.elements; _i < _a.length; _i++) {
                     var specifier = _a[_i];
-                    if (resolver.isValueAliasDeclaration(specifier)) {
-                        var exportedValue = ts.createPropertyAccess(generatedName, specifier.propertyName || specifier.name);
-                        statements.push(ts.createStatement(createExportAssignment(specifier.name, exportedValue), 
-                        /*location*/ specifier));
-                    }
+                    var exportedValue = ts.createPropertyAccess(generatedName, specifier.propertyName || specifier.name);
+                    statements.push(ts.setTextRange(ts.createStatement(createExportExpression(ts.getExportName(specifier), exportedValue)), specifier));
                 }
                 return ts.singleOrMany(statements);
             }
-            else if (resolver.moduleExportsSomeValue(node.moduleSpecifier)) {
+            else {
                 // export * from "mod";
-                return ts.createStatement(ts.createCall(ts.createIdentifier("__export"), 
-                /*typeArguments*/ undefined, [
-                    moduleKind !== ts.ModuleKind.AMD
-                        ? createRequireCall(node)
-                        : generatedName
-                ]), 
-                /*location*/ node);
+                return ts.setTextRange(ts.createStatement(createExportStarHelper(context, moduleKind !== ts.ModuleKind.AMD ? createRequireCall(node) : generatedName)), node);
             }
         }
+        /**
+         * Visits an ExportAssignment node.
+         *
+         * @param node The node to visit.
+         */
         function visitExportAssignment(node) {
-            if (!node.isExportEquals) {
-                if (ts.nodeIsSynthesized(node) || resolver.isValueAliasDeclaration(node)) {
-                    var statements = [];
-                    addExportDefault(statements, node.expression, /*location*/ node);
-                    return statements;
-                }
+            if (node.isExportEquals) {
+                return undefined;
             }
-            return undefined;
+            var statements;
+            var original = node.original;
+            if (original && hasAssociatedEndOfDeclarationMarker(original)) {
+                // Defer exports until we encounter an EndOfDeclarationMarker node
+                var id = ts.getOriginalNodeId(node);
+                deferredExports[id] = appendExportStatement(deferredExports[id], ts.createIdentifier("default"), node.expression, /*location*/ node, /*allowComments*/ true);
+            }
+            else {
+                statements = appendExportStatement(statements, ts.createIdentifier("default"), node.expression, /*location*/ node, /*allowComments*/ true);
+            }
+            return ts.singleOrMany(statements);
         }
-        function addExportDefault(statements, expression, location) {
-            tryAddExportDefaultCompat(statements);
-            statements.push(ts.createStatement(createExportAssignment(ts.createIdentifier("default"), expression), location));
+        /**
+         * Visits a FunctionDeclaration node.
+         *
+         * @param node The node to visit.
+         */
+        function visitFunctionDeclaration(node) {
+            var statements;
+            if (ts.hasModifier(node, 1 /* Export */)) {
+                statements = ts.append(statements, ts.setOriginalNode(ts.setTextRange(ts.createFunctionDeclaration(
+                /*decorators*/ undefined, ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), node.asteriskToken, ts.getDeclarationName(node, /*allowComments*/ true, /*allowSourceMaps*/ true), 
+                /*typeParameters*/ undefined, ts.visitNodes(node.parameters, importCallExpressionVisitor), 
+                /*type*/ undefined, ts.visitEachChild(node.body, importCallExpressionVisitor, context)), 
+                /*location*/ node), 
+                /*original*/ node));
+            }
+            else {
+                statements = ts.append(statements, ts.visitEachChild(node, importCallExpressionVisitor, context));
+            }
+            if (hasAssociatedEndOfDeclarationMarker(node)) {
+                // Defer exports until we encounter an EndOfDeclarationMarker node
+                var id = ts.getOriginalNodeId(node);
+                deferredExports[id] = appendExportsOfHoistedDeclaration(deferredExports[id], node);
+            }
+            else {
+                statements = appendExportsOfHoistedDeclaration(statements, node);
+            }
+            return ts.singleOrMany(statements);
+        }
+        /**
+         * Visits a ClassDeclaration node.
+         *
+         * @param node The node to visit.
+         */
+        function visitClassDeclaration(node) {
+            var statements;
+            if (ts.hasModifier(node, 1 /* Export */)) {
+                statements = ts.append(statements, ts.setOriginalNode(ts.setTextRange(ts.createClassDeclaration(
+                /*decorators*/ undefined, ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), ts.getDeclarationName(node, /*allowComments*/ true, /*allowSourceMaps*/ true), 
+                /*typeParameters*/ undefined, ts.visitNodes(node.heritageClauses, importCallExpressionVisitor), node.members), node), node));
+            }
+            else {
+                statements = ts.append(statements, ts.visitEachChild(node, importCallExpressionVisitor, context));
+            }
+            if (hasAssociatedEndOfDeclarationMarker(node)) {
+                // Defer exports until we encounter an EndOfDeclarationMarker node
+                var id = ts.getOriginalNodeId(node);
+                deferredExports[id] = appendExportsOfHoistedDeclaration(deferredExports[id], node);
+            }
+            else {
+                statements = appendExportsOfHoistedDeclaration(statements, node);
+            }
+            return ts.singleOrMany(statements);
         }
-        function tryAddExportDefaultCompat(statements) {
-            var original = ts.getOriginalNode(currentSourceFile);
-            ts.Debug.assert(original.kind === 256 /* SourceFile */);
-            if (!original.symbol.exports["___esModule"]) {
-                if (languageVersion === 0 /* ES3 */) {
-                    statements.push(ts.createStatement(createExportAssignment(ts.createIdentifier("__esModule"), ts.createLiteral(true))));
+        /**
+         * Visits a VariableStatement node.
+         *
+         * @param node The node to visit.
+         */
+        function visitVariableStatement(node) {
+            var statements;
+            var variables;
+            var expressions;
+            if (ts.hasModifier(node, 1 /* Export */)) {
+                var modifiers = void 0;
+                // If we're exporting these variables, then these just become assignments to 'exports.x'.
+                // We only want to emit assignments for variables with initializers.
+                for (var _i = 0, _a = node.declarationList.declarations; _i < _a.length; _i++) {
+                    var variable = _a[_i];
+                    if (ts.isIdentifier(variable.name) && ts.isLocalName(variable.name)) {
+                        if (!modifiers) {
+                            modifiers = ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier);
+                        }
+                        variables = ts.append(variables, variable);
+                    }
+                    else if (variable.initializer) {
+                        expressions = ts.append(expressions, transformInitializedVariable(variable));
+                    }
                 }
-                else {
-                    statements.push(ts.createStatement(ts.createCall(ts.createPropertyAccess(ts.createIdentifier("Object"), "defineProperty"), 
-                    /*typeArguments*/ undefined, [
-                        ts.createIdentifier("exports"),
-                        ts.createLiteral("__esModule"),
-                        ts.createObjectLiteral([
-                            ts.createPropertyAssignment("value", ts.createLiteral(true))
-                        ])
-                    ])));
+                if (variables) {
+                    statements = ts.append(statements, ts.updateVariableStatement(node, modifiers, ts.updateVariableDeclarationList(node.declarationList, variables)));
+                }
+                if (expressions) {
+                    statements = ts.append(statements, ts.setTextRange(ts.createStatement(ts.inlineExpressions(expressions)), node));
                 }
             }
+            else {
+                statements = ts.append(statements, ts.visitEachChild(node, importCallExpressionVisitor, context));
+            }
+            if (hasAssociatedEndOfDeclarationMarker(node)) {
+                // Defer exports until we encounter an EndOfDeclarationMarker node
+                var id = ts.getOriginalNodeId(node);
+                deferredExports[id] = appendExportsOfVariableStatement(deferredExports[id], node);
+            }
+            else {
+                statements = appendExportsOfVariableStatement(statements, node);
+            }
+            return ts.singleOrMany(statements);
         }
-        function addExportImportAssignments(statements, node) {
-            if (ts.isImportEqualsDeclaration(node)) {
-                addExportMemberAssignments(statements, node.name);
+        /**
+         * Transforms an exported variable with an initializer into an expression.
+         *
+         * @param node The node to transform.
+         */
+        function transformInitializedVariable(node) {
+            if (ts.isBindingPattern(node.name)) {
+                return ts.flattenDestructuringAssignment(ts.visitNode(node, importCallExpressionVisitor), 
+                /*visitor*/ undefined, context, 0 /* All */, 
+                /*needsValue*/ false, createExportExpression);
             }
             else {
-                var names = ts.reduceEachChild(node, collectExportMembers, []);
-                for (var _i = 0, names_1 = names; _i < names_1.length; _i++) {
-                    var name_39 = names_1[_i];
-                    addExportMemberAssignments(statements, name_39);
-                }
+                return ts.createAssignment(ts.setTextRange(ts.createPropertyAccess(ts.createIdentifier("exports"), node.name), 
+                /*location*/ node.name), ts.visitNode(node.initializer, importCallExpressionVisitor));
             }
         }
-        function collectExportMembers(names, node) {
-            if (ts.isAliasSymbolDeclaration(node) && resolver.isValueAliasDeclaration(node) && ts.isDeclaration(node)) {
-                var name_40 = node.name;
-                if (ts.isIdentifier(name_40)) {
-                    names.push(name_40);
-                }
+        /**
+         * Visits a MergeDeclarationMarker used as a placeholder for the beginning of a merged
+         * and transformed declaration.
+         *
+         * @param node The node to visit.
+         */
+        function visitMergeDeclarationMarker(node) {
+            // For an EnumDeclaration or ModuleDeclaration that merges with a preceeding
+            // declaration we do not emit a leading variable declaration. To preserve the
+            // begin/end semantics of the declararation and to properly handle exports
+            // we wrapped the leading variable declaration in a `MergeDeclarationMarker`.
+            //
+            // To balance the declaration, add the exports of the elided variable
+            // statement.
+            if (hasAssociatedEndOfDeclarationMarker(node) && node.original.kind === 208 /* VariableStatement */) {
+                var id = ts.getOriginalNodeId(node);
+                deferredExports[id] = appendExportsOfVariableStatement(deferredExports[id], node.original);
             }
-            return ts.reduceEachChild(node, collectExportMembers, names);
+            return node;
         }
-        function addExportMemberAssignments(statements, name) {
-            if (!exportEquals && exportSpecifiers && ts.hasProperty(exportSpecifiers, name.text)) {
-                for (var _i = 0, _a = exportSpecifiers[name.text]; _i < _a.length; _i++) {
-                    var specifier = _a[_i];
-                    statements.push(ts.startOnNewLine(ts.createStatement(createExportAssignment(specifier.name, name), 
-                    /*location*/ specifier.name)));
-                }
+        /**
+         * Determines whether a node has an associated EndOfDeclarationMarker.
+         *
+         * @param node The node to test.
+         */
+        function hasAssociatedEndOfDeclarationMarker(node) {
+            return (ts.getEmitFlags(node) & 4194304 /* HasEndOfDeclarationMarker */) !== 0;
+        }
+        /**
+         * Visits a DeclarationMarker used as a placeholder for the end of a transformed
+         * declaration.
+         *
+         * @param node The node to visit.
+         */
+        function visitEndOfDeclarationMarker(node) {
+            // For some transformations we emit an `EndOfDeclarationMarker` to mark the actual
+            // end of the transformed declaration. We use this marker to emit any deferred exports
+            // of the declaration.
+            var id = ts.getOriginalNodeId(node);
+            var statements = deferredExports[id];
+            if (statements) {
+                delete deferredExports[id];
+                return ts.append(statements, node);
             }
+            return node;
         }
-        function addExportMemberAssignment(statements, node) {
-            if (ts.hasModifier(node, 512 /* Default */)) {
-                addExportDefault(statements, getDeclarationName(node), /*location*/ node);
+        /**
+         * Appends the exports of an ImportDeclaration to a statement list, returning the
+         * statement list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param decl The declaration whose exports are to be recorded.
+         */
+        function appendExportsOfImportDeclaration(statements, decl) {
+            if (currentModuleInfo.exportEquals) {
+                return statements;
             }
-            else {
-                statements.push(createExportStatement(node.name, ts.setEmitFlags(ts.getSynthesizedClone(node.name), 262144 /* LocalName */), /*location*/ node));
+            var importClause = decl.importClause;
+            if (!importClause) {
+                return statements;
             }
-        }
-        function visitVariableStatement(node) {
-            // If the variable is for a generated declaration,
-            // we should maintain it and just strip off the 'export' modifier if necessary.
-            var originalKind = ts.getOriginalNode(node).kind;
-            if (originalKind === 225 /* ModuleDeclaration */ ||
-                originalKind === 224 /* EnumDeclaration */ ||
-                originalKind === 221 /* ClassDeclaration */) {
-                if (!ts.hasModifier(node, 1 /* Export */)) {
-                    return node;
-                }
-                return ts.setOriginalNode(ts.createVariableStatement(
-                /*modifiers*/ undefined, node.declarationList), node);
+            if (importClause.name) {
+                statements = appendExportsOfDeclaration(statements, importClause);
             }
-            var resultStatements = [];
-            // If we're exporting these variables, then these just become assignments to 'exports.blah'.
-            // We only want to emit assignments for variables with initializers.
-            if (ts.hasModifier(node, 1 /* Export */)) {
-                var variables = ts.getInitializedVariables(node.declarationList);
-                if (variables.length > 0) {
-                    var inlineAssignments = ts.createStatement(ts.inlineExpressions(ts.map(variables, transformInitializedVariable)), node);
-                    resultStatements.push(inlineAssignments);
+            var namedBindings = importClause.namedBindings;
+            if (namedBindings) {
+                switch (namedBindings.kind) {
+                    case 240 /* NamespaceImport */:
+                        statements = appendExportsOfDeclaration(statements, namedBindings);
+                        break;
+                    case 241 /* NamedImports */:
+                        for (var _i = 0, _a = namedBindings.elements; _i < _a.length; _i++) {
+                            var importBinding = _a[_i];
+                            statements = appendExportsOfDeclaration(statements, importBinding);
+                        }
+                        break;
                 }
             }
-            else {
-                resultStatements.push(node);
+            return statements;
+        }
+        /**
+         * Appends the exports of an ImportEqualsDeclaration to a statement list, returning the
+         * statement list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param decl The declaration whose exports are to be recorded.
+         */
+        function appendExportsOfImportEqualsDeclaration(statements, decl) {
+            if (currentModuleInfo.exportEquals) {
+                return statements;
+            }
+            return appendExportsOfDeclaration(statements, decl);
+        }
+        /**
+         * Appends the exports of a VariableStatement to a statement list, returning the statement
+         * list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param node The VariableStatement whose exports are to be recorded.
+         */
+        function appendExportsOfVariableStatement(statements, node) {
+            if (currentModuleInfo.exportEquals) {
+                return statements;
             }
-            // While we might not have been exported here, each variable might have been exported
-            // later on in an export specifier (e.g. `export {foo as blah, bar}`).
             for (var _i = 0, _a = node.declarationList.declarations; _i < _a.length; _i++) {
                 var decl = _a[_i];
-                addExportMemberAssignmentsForBindingName(resultStatements, decl.name);
+                statements = appendExportsOfBindingElement(statements, decl);
             }
-            return resultStatements;
+            return statements;
         }
         /**
-         * Creates appropriate assignments for each binding identifier that is exported in an export specifier,
-         * and inserts it into 'resultStatements'.
+         * Appends the exports of a VariableDeclaration or BindingElement to a statement list,
+         * returning the statement list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param decl The declaration whose exports are to be recorded.
          */
-        function addExportMemberAssignmentsForBindingName(resultStatements, name) {
-            if (ts.isBindingPattern(name)) {
-                for (var _i = 0, _a = name.elements; _i < _a.length; _i++) {
+        function appendExportsOfBindingElement(statements, decl) {
+            if (currentModuleInfo.exportEquals) {
+                return statements;
+            }
+            if (ts.isBindingPattern(decl.name)) {
+                for (var _i = 0, _a = decl.name.elements; _i < _a.length; _i++) {
                     var element = _a[_i];
                     if (!ts.isOmittedExpression(element)) {
-                        addExportMemberAssignmentsForBindingName(resultStatements, element.name);
+                        statements = appendExportsOfBindingElement(statements, element);
                     }
                 }
             }
-            else {
-                if (!exportEquals && exportSpecifiers && ts.hasProperty(exportSpecifiers, name.text)) {
-                    var sourceFileId = ts.getOriginalNodeId(currentSourceFile);
-                    if (!bindingNameExportSpecifiersForFileMap[sourceFileId]) {
-                        bindingNameExportSpecifiersForFileMap[sourceFileId] = ts.createMap();
-                    }
-                    bindingNameExportSpecifiersForFileMap[sourceFileId][name.text] = exportSpecifiers[name.text];
-                    addExportMemberAssignments(resultStatements, name);
-                }
-            }
-        }
-        function transformInitializedVariable(node) {
-            var name = node.name;
-            if (ts.isBindingPattern(name)) {
-                return ts.flattenVariableDestructuringToExpression(context, node, hoistVariableDeclaration, getModuleMemberName, visitor);
-            }
-            else {
-                return ts.createAssignment(getModuleMemberName(name), ts.visitNode(node.initializer, visitor, ts.isExpression));
+            else if (!ts.isGeneratedIdentifier(decl.name)) {
+                statements = appendExportsOfDeclaration(statements, decl);
             }
+            return statements;
         }
-        function visitFunctionDeclaration(node) {
-            var statements = [];
-            var name = node.name || ts.getGeneratedNameForNode(node);
-            if (ts.hasModifier(node, 1 /* Export */)) {
-                statements.push(ts.setOriginalNode(ts.createFunctionDeclaration(
-                /*decorators*/ undefined, 
-                /*modifiers*/ undefined, node.asteriskToken, name, 
-                /*typeParameters*/ undefined, node.parameters, 
-                /*type*/ undefined, node.body, 
-                /*location*/ node), 
-                /*original*/ node));
-                addExportMemberAssignment(statements, node);
+        /**
+         * Appends the exports of a ClassDeclaration or FunctionDeclaration to a statement list,
+         * returning the statement list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param decl The declaration whose exports are to be recorded.
+         */
+        function appendExportsOfHoistedDeclaration(statements, decl) {
+            if (currentModuleInfo.exportEquals) {
+                return statements;
             }
-            else {
-                statements.push(node);
+            if (ts.hasModifier(decl, 1 /* Export */)) {
+                var exportName = ts.hasModifier(decl, 512 /* Default */) ? ts.createIdentifier("default") : decl.name;
+                statements = appendExportStatement(statements, exportName, ts.getLocalName(decl), /*location*/ decl);
             }
-            if (node.name) {
-                addExportMemberAssignments(statements, node.name);
+            if (decl.name) {
+                statements = appendExportsOfDeclaration(statements, decl);
             }
-            return ts.singleOrMany(statements);
+            return statements;
         }
-        function visitClassDeclaration(node) {
-            var statements = [];
-            var name = node.name || ts.getGeneratedNameForNode(node);
-            if (ts.hasModifier(node, 1 /* Export */)) {
-                statements.push(ts.setOriginalNode(ts.createClassDeclaration(
-                /*decorators*/ undefined, 
-                /*modifiers*/ undefined, name, 
-                /*typeParameters*/ undefined, node.heritageClauses, node.members, 
-                /*location*/ node), 
-                /*original*/ node));
-                addExportMemberAssignment(statements, node);
-            }
-            else {
-                statements.push(node);
-            }
-            // Decorators end up creating a series of assignment expressions which overwrite
-            // the local binding that we export, so we need to defer from exporting decorated classes
-            // until the decoration assignments take place. We do this when visiting expression-statements.
-            if (node.name && !(node.decorators && node.decorators.length)) {
-                addExportMemberAssignments(statements, node.name);
+        /**
+         * Appends the exports of a declaration to a statement list, returning the statement list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param decl The declaration to export.
+         */
+        function appendExportsOfDeclaration(statements, decl) {
+            var name = ts.getDeclarationName(decl);
+            var exportSpecifiers = currentModuleInfo.exportSpecifiers.get(name.text);
+            if (exportSpecifiers) {
+                for (var _i = 0, exportSpecifiers_1 = exportSpecifiers; _i < exportSpecifiers_1.length; _i++) {
+                    var exportSpecifier = exportSpecifiers_1[_i];
+                    statements = appendExportStatement(statements, exportSpecifier.name, name, /*location*/ exportSpecifier.name);
+                }
             }
-            return ts.singleOrMany(statements);
+            return statements;
+        }
+        /**
+         * Appends the down-level representation of an export to a statement list, returning the
+         * statement list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param exportName The name of the export.
+         * @param expression The expression to export.
+         * @param location The location to use for source maps and comments for the export.
+         * @param allowComments Whether to allow comments on the export.
+         */
+        function appendExportStatement(statements, exportName, expression, location, allowComments) {
+            statements = ts.append(statements, createExportStatement(exportName, expression, location, allowComments));
+            return statements;
         }
-        function visitExpressionStatement(node) {
-            var original = ts.getOriginalNode(node);
-            var origKind = original.kind;
-            if (origKind === 224 /* EnumDeclaration */ || origKind === 225 /* ModuleDeclaration */) {
-                return visitExpressionStatementForEnumOrNamespaceDeclaration(node, original);
+        function createUnderscoreUnderscoreESModule() {
+            var statement;
+            if (languageVersion === 0 /* ES3 */) {
+                statement = ts.createStatement(createExportExpression(ts.createIdentifier("__esModule"), ts.createLiteral(/*value*/ true)));
             }
-            else if (origKind === 221 /* ClassDeclaration */) {
-                // The decorated assignment for a class name may need to be transformed.
-                var classDecl = original;
-                if (classDecl.name) {
-                    var statements = [node];
-                    addExportMemberAssignments(statements, classDecl.name);
-                    return statements;
-                }
-            }
-            return node;
+            else {
+                statement = ts.createStatement(ts.createCall(ts.createPropertyAccess(ts.createIdentifier("Object"), "defineProperty"), 
+                /*typeArguments*/ undefined, [
+                    ts.createIdentifier("exports"),
+                    ts.createLiteral("__esModule"),
+                    ts.createObjectLiteral([
+                        ts.createPropertyAssignment("value", ts.createLiteral(/*value*/ true))
+                    ])
+                ]));
+            }
+            ts.setEmitFlags(statement, 1048576 /* CustomPrologue */);
+            return statement;
         }
-        function visitExpressionStatementForEnumOrNamespaceDeclaration(node, original) {
-            var statements = [node];
-            // Preserve old behavior for enums in which a variable statement is emitted after the body itself.
-            if (ts.hasModifier(original, 1 /* Export */) &&
-                original.kind === 224 /* EnumDeclaration */ &&
-                ts.isFirstDeclarationOfKind(original, 224 /* EnumDeclaration */)) {
-                addVarForExportedEnumOrNamespaceDeclaration(statements, original);
+        /**
+         * Creates a call to the current file's export function to export a value.
+         *
+         * @param name The bound name of the export.
+         * @param value The exported value.
+         * @param location The location to use for source maps and comments for the export.
+         * @param allowComments An optional value indicating whether to emit comments for the statement.
+         */
+        function createExportStatement(name, value, location, allowComments) {
+            var statement = ts.setTextRange(ts.createStatement(createExportExpression(name, value)), location);
+            ts.startOnNewLine(statement);
+            if (!allowComments) {
+                ts.setEmitFlags(statement, 1536 /* NoComments */);
             }
-            addExportMemberAssignments(statements, original.name);
-            return statements;
+            return statement;
         }
         /**
-         * Adds a trailing VariableStatement for an enum or module declaration.
+         * Creates a call to the current file's export function to export a value.
+         *
+         * @param name The bound name of the export.
+         * @param value The exported value.
+         * @param location The location to use for source maps and comments for the export.
          */
-        function addVarForExportedEnumOrNamespaceDeclaration(statements, node) {
-            var transformedStatement = ts.createVariableStatement(
-            /*modifiers*/ undefined, [ts.createVariableDeclaration(getDeclarationName(node), 
-                /*type*/ undefined, ts.createPropertyAccess(ts.createIdentifier("exports"), getDeclarationName(node)))], 
-            /*location*/ node);
-            ts.setEmitFlags(transformedStatement, 49152 /* NoComments */);
-            statements.push(transformedStatement);
+        function createExportExpression(name, value, location) {
+            return ts.setTextRange(ts.createAssignment(ts.createPropertyAccess(ts.createIdentifier("exports"), ts.getSynthesizedClone(name)), value), location);
         }
-        function getDeclarationName(node) {
-            return node.name ? ts.getSynthesizedClone(node.name) : ts.getGeneratedNameForNode(node);
+        //
+        // Modifier Visitors
+        //
+        /**
+         * Visit nodes to elide module-specific modifiers.
+         *
+         * @param node The node to visit.
+         */
+        function modifierVisitor(node) {
+            // Elide module-specific modifiers.
+            switch (node.kind) {
+                case 84 /* ExportKeyword */:
+                case 79 /* DefaultKeyword */:
+                    return undefined;
+            }
+            return node;
         }
-        function onEmitNode(emitContext, node, emitCallback) {
-            if (node.kind === 256 /* SourceFile */) {
-                bindingNameExportSpecifiersMap = bindingNameExportSpecifiersForFileMap[ts.getOriginalNodeId(node)];
-                previousOnEmitNode(emitContext, node, emitCallback);
-                bindingNameExportSpecifiersMap = undefined;
+        //
+        // Emit Notification
+        //
+        /**
+         * Hook for node emit notifications.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to emit.
+         * @param emit A callback used to emit the node in the printer.
+         */
+        function onEmitNode(hint, node, emitCallback) {
+            if (node.kind === 265 /* SourceFile */) {
+                currentSourceFile = node;
+                currentModuleInfo = moduleInfoMap[ts.getOriginalNodeId(currentSourceFile)];
+                noSubstitution = [];
+                previousOnEmitNode(hint, node, emitCallback);
+                currentSourceFile = undefined;
+                currentModuleInfo = undefined;
+                noSubstitution = undefined;
             }
             else {
-                previousOnEmitNode(emitContext, node, emitCallback);
+                previousOnEmitNode(hint, node, emitCallback);
             }
         }
+        //
+        // Substitutions
+        //
         /**
          * Hooks node substitutions.
          *
+         * @param hint A hint as to the intended usage of the node.
          * @param node The node to substitute.
-         * @param isExpression A value indicating whether the node is to be used in an expression
-         *                     position.
          */
-        function onSubstituteNode(emitContext, node) {
-            node = previousOnSubstituteNode(emitContext, node);
-            if (emitContext === 1 /* Expression */) {
+        function onSubstituteNode(hint, node) {
+            node = previousOnSubstituteNode(hint, node);
+            if (node.id && noSubstitution[node.id]) {
+                return node;
+            }
+            if (hint === 1 /* Expression */) {
                 return substituteExpression(node);
             }
             else if (ts.isShorthandPropertyAssignment(node)) {
@@ -54229,6 +65421,12 @@ var ts;
             }
             return node;
         }
+        /**
+         * Substitution for a ShorthandPropertyAssignment whose declaration name is an imported
+         * or exported symbol.
+         *
+         * @param node The node to substitute.
+         */
         function substituteShorthandPropertyAssignment(node) {
             var name = node.name;
             var exportedOrImportedName = substituteExpressionIdentifier(name);
@@ -54237,249 +65435,215 @@ var ts;
                 // destructuring assignment
                 if (node.objectAssignmentInitializer) {
                     var initializer = ts.createAssignment(exportedOrImportedName, node.objectAssignmentInitializer);
-                    return ts.createPropertyAssignment(name, initializer, /*location*/ node);
+                    return ts.setTextRange(ts.createPropertyAssignment(name, initializer), node);
                 }
-                return ts.createPropertyAssignment(name, exportedOrImportedName, /*location*/ node);
+                return ts.setTextRange(ts.createPropertyAssignment(name, exportedOrImportedName), node);
             }
             return node;
         }
+        /**
+         * Substitution for an Expression that may contain an imported or exported symbol.
+         *
+         * @param node The node to substitute.
+         */
         function substituteExpression(node) {
             switch (node.kind) {
-                case 69 /* Identifier */:
+                case 71 /* Identifier */:
                     return substituteExpressionIdentifier(node);
-                case 187 /* BinaryExpression */:
+                case 194 /* BinaryExpression */:
                     return substituteBinaryExpression(node);
-                case 186 /* PostfixUnaryExpression */:
-                case 185 /* PrefixUnaryExpression */:
+                case 193 /* PostfixUnaryExpression */:
+                case 192 /* PrefixUnaryExpression */:
                     return substituteUnaryExpression(node);
             }
             return node;
         }
+        /**
+         * Substitution for an Identifier expression that may contain an imported or exported
+         * symbol.
+         *
+         * @param node The node to substitute.
+         */
         function substituteExpressionIdentifier(node) {
-            return trySubstituteExportedName(node)
-                || trySubstituteImportedName(node)
-                || node;
-        }
-        function substituteBinaryExpression(node) {
-            var left = node.left;
-            // If the left-hand-side of the binaryExpression is an identifier and its is export through export Specifier
-            if (ts.isIdentifier(left) && ts.isAssignmentOperator(node.operatorToken.kind)) {
-                if (bindingNameExportSpecifiersMap && ts.hasProperty(bindingNameExportSpecifiersMap, left.text)) {
-                    ts.setEmitFlags(node, 128 /* NoSubstitution */);
-                    var nestedExportAssignment = void 0;
-                    for (var _i = 0, _a = bindingNameExportSpecifiersMap[left.text]; _i < _a.length; _i++) {
-                        var specifier = _a[_i];
-                        nestedExportAssignment = nestedExportAssignment ?
-                            createExportAssignment(specifier.name, nestedExportAssignment) :
-                            createExportAssignment(specifier.name, node);
-                    }
-                    return nestedExportAssignment;
+            if (ts.getEmitFlags(node) & 4096 /* HelperName */) {
+                var externalHelpersModuleName = ts.getExternalHelpersModuleName(currentSourceFile);
+                if (externalHelpersModuleName) {
+                    return ts.createPropertyAccess(externalHelpersModuleName, node);
                 }
+                return node;
             }
-            return node;
-        }
-        function substituteUnaryExpression(node) {
-            // Because how the compiler only parse plusplus and minusminus to be either prefixUnaryExpression or postFixUnaryExpression depended on where they are
-            // We don't need to check that the operator has SyntaxKind.plusplus or SyntaxKind.minusminus
-            var operator = node.operator;
-            var operand = node.operand;
-            if (ts.isIdentifier(operand) && bindingNameExportSpecifiersForFileMap) {
-                if (bindingNameExportSpecifiersMap && ts.hasProperty(bindingNameExportSpecifiersMap, operand.text)) {
-                    ts.setEmitFlags(node, 128 /* NoSubstitution */);
-                    var transformedUnaryExpression = void 0;
-                    if (node.kind === 186 /* PostfixUnaryExpression */) {
-                        transformedUnaryExpression = ts.createBinary(operand, ts.createNode(operator === 41 /* PlusPlusToken */ ? 57 /* PlusEqualsToken */ : 58 /* MinusEqualsToken */), ts.createLiteral(1), 
+            if (!ts.isGeneratedIdentifier(node) && !ts.isLocalName(node)) {
+                var exportContainer = resolver.getReferencedExportContainer(node, ts.isExportName(node));
+                if (exportContainer && exportContainer.kind === 265 /* SourceFile */) {
+                    return ts.setTextRange(ts.createPropertyAccess(ts.createIdentifier("exports"), ts.getSynthesizedClone(node)), 
+                    /*location*/ node);
+                }
+                var importDeclaration = resolver.getReferencedImportDeclaration(node);
+                if (importDeclaration) {
+                    if (ts.isImportClause(importDeclaration)) {
+                        return ts.setTextRange(ts.createPropertyAccess(ts.getGeneratedNameForNode(importDeclaration.parent), ts.createIdentifier("default")), 
                         /*location*/ node);
-                        // We have to set no substitution flag here to prevent visit the binary expression and substitute it again as we will preform all necessary substitution in here
-                        ts.setEmitFlags(transformedUnaryExpression, 128 /* NoSubstitution */);
                     }
-                    var nestedExportAssignment = void 0;
-                    for (var _i = 0, _a = bindingNameExportSpecifiersMap[operand.text]; _i < _a.length; _i++) {
-                        var specifier = _a[_i];
-                        nestedExportAssignment = nestedExportAssignment ?
-                            createExportAssignment(specifier.name, nestedExportAssignment) :
-                            createExportAssignment(specifier.name, transformedUnaryExpression || node);
+                    else if (ts.isImportSpecifier(importDeclaration)) {
+                        var name_54 = importDeclaration.propertyName || importDeclaration.name;
+                        return ts.setTextRange(ts.createPropertyAccess(ts.getGeneratedNameForNode(importDeclaration.parent.parent.parent), ts.getSynthesizedClone(name_54)), 
+                        /*location*/ node);
                     }
-                    return nestedExportAssignment;
                 }
             }
             return node;
         }
-        function trySubstituteExportedName(node) {
-            var emitFlags = ts.getEmitFlags(node);
-            if ((emitFlags & 262144 /* LocalName */) === 0) {
-                var container = resolver.getReferencedExportContainer(node, (emitFlags & 131072 /* ExportName */) !== 0);
-                if (container) {
-                    if (container.kind === 256 /* SourceFile */) {
-                        return ts.createPropertyAccess(ts.createIdentifier("exports"), ts.getSynthesizedClone(node), 
-                        /*location*/ node);
-                    }
+        /**
+         * Substitution for a BinaryExpression that may contain an imported or exported symbol.
+         *
+         * @param node The node to substitute.
+         */
+        function substituteBinaryExpression(node) {
+            // When we see an assignment expression whose left-hand side is an exported symbol,
+            // we should ensure all exports of that symbol are updated with the correct value.
+            //
+            // - We do not substitute generated identifiers for any reason.
+            // - We do not substitute identifiers tagged with the LocalName flag.
+            // - We do not substitute identifiers that were originally the name of an enum or
+            //   namespace due to how they are transformed in TypeScript.
+            // - We only substitute identifiers that are exported at the top level.
+            if (ts.isAssignmentOperator(node.operatorToken.kind)
+                && ts.isIdentifier(node.left)
+                && !ts.isGeneratedIdentifier(node.left)
+                && !ts.isLocalName(node.left)
+                && !ts.isDeclarationNameOfEnumOrNamespace(node.left)) {
+                var exportedNames = getExports(node.left);
+                if (exportedNames) {
+                    // For each additional export of the declaration, apply an export assignment.
+                    var expression = node;
+                    for (var _i = 0, exportedNames_1 = exportedNames; _i < exportedNames_1.length; _i++) {
+                        var exportName = exportedNames_1[_i];
+                        // Mark the node to prevent triggering this rule again.
+                        noSubstitution[ts.getNodeId(expression)] = true;
+                        expression = createExportExpression(exportName, expression, /*location*/ node);
+                    }
+                    return expression;
                 }
             }
-            return undefined;
+            return node;
         }
-        function trySubstituteImportedName(node) {
-            if ((ts.getEmitFlags(node) & 262144 /* LocalName */) === 0) {
-                var declaration = resolver.getReferencedImportDeclaration(node);
-                if (declaration) {
-                    if (ts.isImportClause(declaration)) {
-                        if (languageVersion >= 1 /* ES5 */) {
-                            return ts.createPropertyAccess(ts.getGeneratedNameForNode(declaration.parent), ts.createIdentifier("default"), 
-                            /*location*/ node);
-                        }
-                        else {
-                            // TODO: ES3 transform to handle x.default -> x["default"]
-                            return ts.createElementAccess(ts.getGeneratedNameForNode(declaration.parent), ts.createLiteral("default"), 
-                            /*location*/ node);
-                        }
-                    }
-                    else if (ts.isImportSpecifier(declaration)) {
-                        var name_41 = declaration.propertyName || declaration.name;
-                        if (name_41.originalKeywordKind === 77 /* DefaultKeyword */ && languageVersion <= 0 /* ES3 */) {
-                            // TODO: ES3 transform to handle x.default -> x["default"]
-                            return ts.createElementAccess(ts.getGeneratedNameForNode(declaration.parent.parent.parent), ts.createLiteral(name_41.text), 
-                            /*location*/ node);
-                        }
-                        else {
-                            return ts.createPropertyAccess(ts.getGeneratedNameForNode(declaration.parent.parent.parent), ts.getSynthesizedClone(name_41), 
-                            /*location*/ node);
-                        }
-                    }
+        /**
+         * Substitution for a UnaryExpression that may contain an imported or exported symbol.
+         *
+         * @param node The node to substitute.
+         */
+        function substituteUnaryExpression(node) {
+            // When we see a prefix or postfix increment expression whose operand is an exported
+            // symbol, we should ensure all exports of that symbol are updated with the correct
+            // value.
+            //
+            // - We do not substitute generated identifiers for any reason.
+            // - We do not substitute identifiers tagged with the LocalName flag.
+            // - We do not substitute identifiers that were originally the name of an enum or
+            //   namespace due to how they are transformed in TypeScript.
+            // - We only substitute identifiers that are exported at the top level.
+            if ((node.operator === 43 /* PlusPlusToken */ || node.operator === 44 /* MinusMinusToken */)
+                && ts.isIdentifier(node.operand)
+                && !ts.isGeneratedIdentifier(node.operand)
+                && !ts.isLocalName(node.operand)
+                && !ts.isDeclarationNameOfEnumOrNamespace(node.operand)) {
+                var exportedNames = getExports(node.operand);
+                if (exportedNames) {
+                    var expression = node.kind === 193 /* PostfixUnaryExpression */
+                        ? ts.setTextRange(ts.createBinary(node.operand, ts.createToken(node.operator === 43 /* PlusPlusToken */ ? 59 /* PlusEqualsToken */ : 60 /* MinusEqualsToken */), ts.createLiteral(1)), 
+                        /*location*/ node)
+                        : node;
+                    for (var _i = 0, exportedNames_2 = exportedNames; _i < exportedNames_2.length; _i++) {
+                        var exportName = exportedNames_2[_i];
+                        // Mark the node to prevent triggering this rule again.
+                        noSubstitution[ts.getNodeId(expression)] = true;
+                        expression = createExportExpression(exportName, expression);
+                    }
+                    return expression;
                 }
             }
-            return undefined;
-        }
-        function getModuleMemberName(name) {
-            return ts.createPropertyAccess(ts.createIdentifier("exports"), name, 
-            /*location*/ name);
-        }
-        function createRequireCall(importNode) {
-            var moduleName = ts.getExternalModuleNameLiteral(importNode, currentSourceFile, host, resolver, compilerOptions);
-            var args = [];
-            if (ts.isDefined(moduleName)) {
-                args.push(moduleName);
-            }
-            return ts.createCall(ts.createIdentifier("require"), /*typeArguments*/ undefined, args);
-        }
-        function createExportStatement(name, value, location) {
-            var statement = ts.createStatement(createExportAssignment(name, value));
-            statement.startsOnNewLine = true;
-            if (location) {
-                ts.setSourceMapRange(statement, location);
-            }
-            return statement;
-        }
-        function createExportAssignment(name, value) {
-            return ts.createAssignment(name.originalKeywordKind === 77 /* DefaultKeyword */ && languageVersion === 0 /* ES3 */
-                ? ts.createElementAccess(ts.createIdentifier("exports"), ts.createLiteral(name.text))
-                : ts.createPropertyAccess(ts.createIdentifier("exports"), ts.getSynthesizedClone(name)), value);
+            return node;
         }
-        function collectAsynchronousDependencies(node, includeNonAmdDependencies) {
-            // names of modules with corresponding parameter in the factory function
-            var aliasedModuleNames = [];
-            // names of modules with no corresponding parameters in factory function
-            var unaliasedModuleNames = [];
-            // names of the parameters in the factory function; these
-            // parameters need to match the indexes of the corresponding
-            // module names in aliasedModuleNames.
-            var importAliasNames = [];
-            // Fill in amd-dependency tags
-            for (var _i = 0, _a = node.amdDependencies; _i < _a.length; _i++) {
-                var amdDependency = _a[_i];
-                if (amdDependency.name) {
-                    aliasedModuleNames.push(ts.createLiteral(amdDependency.path));
-                    importAliasNames.push(ts.createParameter(amdDependency.name));
-                }
-                else {
-                    unaliasedModuleNames.push(ts.createLiteral(amdDependency.path));
-                }
-            }
-            for (var _b = 0, externalImports_1 = externalImports; _b < externalImports_1.length; _b++) {
-                var importNode = externalImports_1[_b];
-                // Find the name of the external module
-                var externalModuleName = ts.getExternalModuleNameLiteral(importNode, currentSourceFile, host, resolver, compilerOptions);
-                // Find the name of the module alias, if there is one
-                var importAliasName = ts.getLocalNameForExternalImport(importNode, currentSourceFile);
-                if (includeNonAmdDependencies && importAliasName) {
-                    // Set emitFlags on the name of the classDeclaration
-                    // This is so that when printer will not substitute the identifier
-                    ts.setEmitFlags(importAliasName, 128 /* NoSubstitution */);
-                    aliasedModuleNames.push(externalModuleName);
-                    importAliasNames.push(ts.createParameter(importAliasName));
-                }
-                else {
-                    unaliasedModuleNames.push(externalModuleName);
+        /**
+         * Gets the additional exports of a name.
+         *
+         * @param name The name.
+         */
+        function getExports(name) {
+            if (!ts.isGeneratedIdentifier(name)) {
+                var valueDeclaration = resolver.getReferencedImportDeclaration(name)
+                    || resolver.getReferencedValueDeclaration(name);
+                if (valueDeclaration) {
+                    return currentModuleInfo
+                        && currentModuleInfo.exportedBindings[ts.getOriginalNodeId(valueDeclaration)];
                 }
             }
-            return { aliasedModuleNames: aliasedModuleNames, unaliasedModuleNames: unaliasedModuleNames, importAliasNames: importAliasNames };
-        }
-        function updateSourceFile(node, statements) {
-            var updated = ts.getMutableClone(node);
-            updated.statements = ts.createNodeArray(statements, node.statements);
-            return updated;
         }
-        var _a;
     }
     ts.transformModule = transformModule;
+    // emit output for the __export helper function
+    var exportStarHelper = {
+        name: "typescript:export-star",
+        scoped: true,
+        text: "\n            function __export(m) {\n                for (var p in m) if (!exports.hasOwnProperty(p)) exports[p] = m[p];\n            }\n        "
+    };
+    function createExportStarHelper(context, module) {
+        var compilerOptions = context.getCompilerOptions();
+        return compilerOptions.importHelpers
+            ? ts.createCall(ts.getHelperName("__exportStar"), /*typeArguments*/ undefined, [module, ts.createIdentifier("exports")])
+            : ts.createCall(ts.createIdentifier("__export"), /*typeArguments*/ undefined, [module]);
+    }
+    // emit helper for dynamic import
+    var dynamicImportUMDHelper = {
+        name: "typescript:dynamicimport-sync-require",
+        scoped: true,
+        text: "\n            var __syncRequire = typeof module === \"object\" && typeof module.exports === \"object\";"
+    };
 })(ts || (ts = {}));
 /// <reference path="../../factory.ts" />
 /// <reference path="../../visitor.ts" />
+/// <reference path="../destructuring.ts" />
 /*@internal*/
 var ts;
 (function (ts) {
     function transformSystemModule(context) {
-        var startLexicalEnvironment = context.startLexicalEnvironment, endLexicalEnvironment = context.endLexicalEnvironment, hoistVariableDeclaration = context.hoistVariableDeclaration, hoistFunctionDeclaration = context.hoistFunctionDeclaration;
+        var startLexicalEnvironment = context.startLexicalEnvironment, endLexicalEnvironment = context.endLexicalEnvironment, hoistVariableDeclaration = context.hoistVariableDeclaration;
         var compilerOptions = context.getCompilerOptions();
         var resolver = context.getEmitResolver();
         var host = context.getEmitHost();
-        var languageVersion = ts.getEmitScriptTarget(compilerOptions);
         var previousOnSubstituteNode = context.onSubstituteNode;
         var previousOnEmitNode = context.onEmitNode;
         context.onSubstituteNode = onSubstituteNode;
         context.onEmitNode = onEmitNode;
-        context.enableSubstitution(69 /* Identifier */);
-        context.enableSubstitution(187 /* BinaryExpression */);
-        context.enableSubstitution(185 /* PrefixUnaryExpression */);
-        context.enableSubstitution(186 /* PostfixUnaryExpression */);
-        context.enableEmitNotification(256 /* SourceFile */);
-        var exportFunctionForFileMap = [];
-        var currentSourceFile;
-        var externalImports;
-        var exportSpecifiers;
-        var exportEquals;
-        var hasExportStarsToExportValues;
-        var exportFunctionForFile;
-        var contextObjectForFile;
-        var exportedLocalNames;
-        var exportedFunctionDeclarations;
+        context.enableSubstitution(71 /* Identifier */); // Substitutes expression identifiers for imported symbols.
+        context.enableSubstitution(194 /* BinaryExpression */); // Substitutes assignments to exported symbols.
+        context.enableSubstitution(192 /* PrefixUnaryExpression */); // Substitutes updates to exported symbols.
+        context.enableSubstitution(193 /* PostfixUnaryExpression */); // Substitutes updates to exported symbols.
+        context.enableEmitNotification(265 /* SourceFile */); // Restore state when substituting nodes in a file.
+        var moduleInfoMap = []; // The ExternalModuleInfo for each file.
+        var deferredExports = []; // Exports to defer until an EndOfDeclarationMarker is found.
+        var exportFunctionsMap = []; // The export function associated with a source file.
+        var noSubstitutionMap = []; // Set of nodes for which substitution rules should be ignored for each file.
+        var currentSourceFile; // The current file.
+        var moduleInfo; // ExternalModuleInfo for the current file.
+        var exportFunction; // The export function for the current file.
+        var contextObject; // The context object for the current file.
+        var hoistedStatements;
         var enclosingBlockScopedContainer;
-        var currentParent;
-        var currentNode;
+        var noSubstitution; // Set of nodes for which substitution rules should be ignored.
         return transformSourceFile;
+        /**
+         * Transforms the module aspects of a SourceFile.
+         *
+         * @param node The SourceFile node.
+         */
         function transformSourceFile(node) {
-            if (ts.isDeclarationFile(node)) {
+            if (node.isDeclarationFile || !(ts.isEffectiveExternalModule(node, compilerOptions) || node.transformFlags & 67108864 /* ContainsDynamicImport */)) {
                 return node;
             }
-            if (ts.isExternalModule(node) || compilerOptions.isolatedModules) {
-                currentSourceFile = node;
-                currentNode = node;
-                // Perform the transformation.
-                var updated = transformSystemModuleWorker(node);
-                ts.aggregateTransformFlags(updated);
-                currentSourceFile = undefined;
-                externalImports = undefined;
-                exportSpecifiers = undefined;
-                exportEquals = undefined;
-                hasExportStarsToExportValues = false;
-                exportFunctionForFile = undefined;
-                contextObjectForFile = undefined;
-                exportedLocalNames = undefined;
-                exportedFunctionDeclarations = undefined;
-                return updated;
-            }
-            return node;
-        }
-        function transformSystemModuleWorker(node) {
+            var id = ts.getOriginalNodeId(node);
+            currentSourceFile = node;
+            enclosingBlockScopedContainer = node;
             // System modules have the following shape:
             //
             //     System.register(['dep-1', ... 'dep-n'], function(exports) {/* module body function */})
@@ -54492,47 +65656,87 @@ var ts;
             //
             // The only exception in this rule is postfix unary operators,
             // see comment to 'substitutePostfixUnaryExpression' for more details
-            ts.Debug.assert(!exportFunctionForFile);
             // Collect information about the external module and dependency groups.
-            (_a = ts.collectExternalModuleInfo(node, resolver), externalImports = _a.externalImports, exportSpecifiers = _a.exportSpecifiers, exportEquals = _a.exportEquals, hasExportStarsToExportValues = _a.hasExportStarsToExportValues, _a);
+            moduleInfo = moduleInfoMap[id] = ts.collectExternalModuleInfo(node, resolver, compilerOptions);
             // Make sure that the name of the 'exports' function does not conflict with
             // existing identifiers.
-            exportFunctionForFile = ts.createUniqueName("exports");
-            contextObjectForFile = ts.createUniqueName("context");
-            exportFunctionForFileMap[ts.getOriginalNodeId(node)] = exportFunctionForFile;
-            var dependencyGroups = collectDependencyGroups(externalImports);
-            var statements = [];
+            exportFunction = ts.createUniqueName("exports");
+            exportFunctionsMap[id] = exportFunction;
+            contextObject = ts.createUniqueName("context");
             // Add the body of the module.
-            addSystemModuleBody(statements, node, dependencyGroups);
-            var moduleName = ts.tryGetModuleNameFromFile(node, host, compilerOptions);
-            var dependencies = ts.createArrayLiteral(ts.map(dependencyGroups, getNameOfDependencyGroup));
-            var body = ts.createFunctionExpression(
+            var dependencyGroups = collectDependencyGroups(moduleInfo.externalImports);
+            var moduleBodyBlock = createSystemModuleBody(node, dependencyGroups);
+            var moduleBodyFunction = ts.createFunctionExpression(
+            /*modifiers*/ undefined, 
             /*asteriskToken*/ undefined, 
             /*name*/ undefined, 
             /*typeParameters*/ undefined, [
-                ts.createParameter(exportFunctionForFile),
-                ts.createParameter(contextObjectForFile)
+                ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, exportFunction),
+                ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, contextObject)
             ], 
-            /*type*/ undefined, ts.setEmitFlags(ts.createBlock(statements, /*location*/ undefined, /*multiLine*/ true), 1 /* EmitEmitHelpers */));
+            /*type*/ undefined, moduleBodyBlock);
             // Write the call to `System.register`
             // Clear the emit-helpers flag for later passes since we'll have already used it in the module body
             // So the helper will be emit at the correct position instead of at the top of the source-file
-            return updateSourceFile(node, [
+            var moduleName = ts.tryGetModuleNameFromFile(node, host, compilerOptions);
+            var dependencies = ts.createArrayLiteral(ts.map(dependencyGroups, function (dependencyGroup) { return dependencyGroup.name; }));
+            var updated = ts.setEmitFlags(ts.updateSourceFileNode(node, ts.setTextRange(ts.createNodeArray([
                 ts.createStatement(ts.createCall(ts.createPropertyAccess(ts.createIdentifier("System"), "register"), 
                 /*typeArguments*/ undefined, moduleName
-                    ? [moduleName, dependencies, body]
-                    : [dependencies, body]))
-            ], /*nodeEmitFlags*/ ~1 /* EmitEmitHelpers */ & ts.getEmitFlags(node));
-            var _a;
+                    ? [moduleName, dependencies, moduleBodyFunction]
+                    : [dependencies, moduleBodyFunction]))
+            ]), node.statements)), 1024 /* NoTrailingComments */);
+            if (!(compilerOptions.outFile || compilerOptions.out)) {
+                ts.moveEmitHelpers(updated, moduleBodyBlock, function (helper) { return !helper.scoped; });
+            }
+            if (noSubstitution) {
+                noSubstitutionMap[id] = noSubstitution;
+                noSubstitution = undefined;
+            }
+            currentSourceFile = undefined;
+            moduleInfo = undefined;
+            exportFunction = undefined;
+            contextObject = undefined;
+            hoistedStatements = undefined;
+            enclosingBlockScopedContainer = undefined;
+            return ts.aggregateTransformFlags(updated);
+        }
+        /**
+         * Collects the dependency groups for this files imports.
+         *
+         * @param externalImports The imports for the file.
+         */
+        function collectDependencyGroups(externalImports) {
+            var groupIndices = ts.createMap();
+            var dependencyGroups = [];
+            for (var i = 0; i < externalImports.length; i++) {
+                var externalImport = externalImports[i];
+                var externalModuleName = ts.getExternalModuleNameLiteral(externalImport, currentSourceFile, host, resolver, compilerOptions);
+                if (externalModuleName) {
+                    var text = externalModuleName.text;
+                    var groupIndex = groupIndices.get(text);
+                    if (groupIndex !== undefined) {
+                        // deduplicate/group entries in dependency list by the dependency name
+                        dependencyGroups[groupIndex].externalImports.push(externalImport);
+                    }
+                    else {
+                        groupIndices.set(text, dependencyGroups.length);
+                        dependencyGroups.push({
+                            name: externalModuleName,
+                            externalImports: [externalImport]
+                        });
+                    }
+                }
+            }
+            return dependencyGroups;
         }
         /**
          * Adds the statements for the module body function for the source file.
          *
-         * @param statements The output statements for the module body.
          * @param node The source file for the module.
-         * @param statementOffset The offset at which to begin visiting the statements of the SourceFile.
+         * @param dependencyGroups The grouped dependencies of the module.
          */
-        function addSystemModuleBody(statements, node, dependencyGroups) {
+        function createSystemModuleBody(node, dependencyGroups) {
             // Shape of the body in system modules:
             //
             //  function (exports) {
@@ -54560,10 +65764,9 @@ var ts;
             // Will be transformed to:
             //
             //  function(exports) {
-            //      var file_1; // local alias
-            //      var y;
             //      function foo() { return y + file_1.x(); }
             //      exports("foo", foo);
+            //      var file_1, y;
             //      return {
             //          setters: [
             //              function(v) { file_1 = v }
@@ -54574,49 +65777,56 @@ var ts;
             //          }
             //      };
             //  }
+            var statements = [];
             // We start a new lexical environment in this function body, but *not* in the
             // body of the execute function. This allows us to emit temporary declarations
             // only in the outer module body and not in the inner one.
             startLexicalEnvironment();
             // Add any prologue directives.
-            var statementOffset = ts.addPrologueDirectives(statements, node.statements, /*ensureUseStrict*/ !compilerOptions.noImplicitUseStrict, visitSourceElement);
+            var ensureUseStrict = compilerOptions.alwaysStrict || (!compilerOptions.noImplicitUseStrict && ts.isExternalModule(currentSourceFile));
+            var statementOffset = ts.addPrologue(statements, node.statements, ensureUseStrict, sourceElementVisitor);
             // var __moduleName = context_1 && context_1.id;
             statements.push(ts.createVariableStatement(
             /*modifiers*/ undefined, ts.createVariableDeclarationList([
                 ts.createVariableDeclaration("__moduleName", 
-                /*type*/ undefined, ts.createLogicalAnd(contextObjectForFile, ts.createPropertyAccess(contextObjectForFile, "id")))
+                /*type*/ undefined, ts.createLogicalAnd(contextObject, ts.createPropertyAccess(contextObject, "id")))
             ])));
+            // Visit the synthetic external helpers import declaration if present
+            ts.visitNode(moduleInfo.externalHelpersImportDeclaration, sourceElementVisitor, ts.isStatement);
             // Visit the statements of the source file, emitting any transformations into
             // the `executeStatements` array. We do this *before* we fill the `setters` array
             // as we both emit transformations as well as aggregate some data used when creating
             // setters. This allows us to reduce the number of times we need to loop through the
             // statements of the source file.
-            var executeStatements = ts.visitNodes(node.statements, visitSourceElement, ts.isStatement, statementOffset);
-            // We emit the lexical environment (hoisted variables and function declarations)
-            // early to align roughly with our previous emit output.
+            var executeStatements = ts.visitNodes(node.statements, sourceElementVisitor, ts.isStatement, statementOffset);
+            // Emit early exports for function declarations.
+            ts.addRange(statements, hoistedStatements);
+            // We emit hoisted variables early to align roughly with our previous emit output.
             // Two key differences in this approach are:
             // - Temporary variables will appear at the top rather than at the bottom of the file
-            // - Calls to the exporter for exported function declarations are grouped after
-            //   the declarations.
             ts.addRange(statements, endLexicalEnvironment());
-            // Emit early exports for function declarations.
-            ts.addRange(statements, exportedFunctionDeclarations);
             var exportStarFunction = addExportStarIfNeeded(statements);
-            statements.push(ts.createReturn(ts.setMultiLine(ts.createObjectLiteral([
-                ts.createPropertyAssignment("setters", generateSetters(exportStarFunction, dependencyGroups)),
+            var moduleObject = ts.createObjectLiteral([
+                ts.createPropertyAssignment("setters", createSettersArray(exportStarFunction, dependencyGroups)),
                 ts.createPropertyAssignment("execute", ts.createFunctionExpression(
+                /*modifiers*/ undefined, 
                 /*asteriskToken*/ undefined, 
                 /*name*/ undefined, 
                 /*typeParameters*/ undefined, 
                 /*parameters*/ [], 
-                /*type*/ undefined, ts.createBlock(executeStatements, 
-                /*location*/ undefined, 
-                /*multiLine*/ true)))
-            ]), 
-            /*multiLine*/ true)));
+                /*type*/ undefined, ts.createBlock(executeStatements, /*multiLine*/ true)))
+            ]);
+            moduleObject.multiLine = true;
+            statements.push(ts.createReturn(moduleObject));
+            return ts.createBlock(statements, /*multiLine*/ true);
         }
+        /**
+         * Adds an exportStar function to a statement list if it is needed for the file.
+         *
+         * @param statements A statement list.
+         */
         function addExportStarIfNeeded(statements) {
-            if (!hasExportStarsToExportValues) {
+            if (!moduleInfo.hasExportStarsToExportValues) {
                 return;
             }
             // when resolving exports local exported entries/indirect exported entries in the module
@@ -54624,33 +65834,38 @@ var ts;
             // to support this we store names of local/indirect exported entries in a set.
             // this set is used to filter names brought by star expors.
             // local names set should only be added if we have anything exported
-            if (!exportedLocalNames && ts.isEmpty(exportSpecifiers)) {
+            if (!moduleInfo.exportedNames && moduleInfo.exportSpecifiers.size === 0) {
                 // no exported declarations (export var ...) or export specifiers (export {x})
                 // check if we have any non star export declarations.
                 var hasExportDeclarationWithExportClause = false;
-                for (var _i = 0, externalImports_2 = externalImports; _i < externalImports_2.length; _i++) {
-                    var externalImport = externalImports_2[_i];
-                    if (externalImport.kind === 236 /* ExportDeclaration */ && externalImport.exportClause) {
+                for (var _i = 0, _a = moduleInfo.externalImports; _i < _a.length; _i++) {
+                    var externalImport = _a[_i];
+                    if (externalImport.kind === 244 /* ExportDeclaration */ && externalImport.exportClause) {
                         hasExportDeclarationWithExportClause = true;
                         break;
                     }
                 }
                 if (!hasExportDeclarationWithExportClause) {
                     // we still need to emit exportStar helper
-                    return addExportStarFunction(statements, /*localNames*/ undefined);
+                    var exportStarFunction_1 = createExportStarFunction(/*localNames*/ undefined);
+                    statements.push(exportStarFunction_1);
+                    return exportStarFunction_1.name;
                 }
             }
             var exportedNames = [];
-            if (exportedLocalNames) {
-                for (var _a = 0, exportedLocalNames_1 = exportedLocalNames; _a < exportedLocalNames_1.length; _a++) {
-                    var exportedLocalName = exportedLocalNames_1[_a];
+            if (moduleInfo.exportedNames) {
+                for (var _b = 0, _c = moduleInfo.exportedNames; _b < _c.length; _b++) {
+                    var exportedLocalName = _c[_b];
+                    if (exportedLocalName.text === "default") {
+                        continue;
+                    }
                     // write name of exported declaration, i.e 'export var x...'
-                    exportedNames.push(ts.createPropertyAssignment(ts.createLiteral(exportedLocalName.text), ts.createLiteral(true)));
+                    exportedNames.push(ts.createPropertyAssignment(ts.createLiteral(exportedLocalName), ts.createTrue()));
                 }
             }
-            for (var _b = 0, externalImports_3 = externalImports; _b < externalImports_3.length; _b++) {
-                var externalImport = externalImports_3[_b];
-                if (externalImport.kind !== 236 /* ExportDeclaration */) {
+            for (var _d = 0, _e = moduleInfo.externalImports; _d < _e.length; _d++) {
+                var externalImport = _e[_d];
+                if (externalImport.kind !== 244 /* ExportDeclaration */) {
                     continue;
                 }
                 var exportDecl = externalImport;
@@ -54658,25 +65873,66 @@ var ts;
                     // export * from ...
                     continue;
                 }
-                for (var _c = 0, _d = exportDecl.exportClause.elements; _c < _d.length; _c++) {
-                    var element = _d[_c];
+                for (var _f = 0, _g = exportDecl.exportClause.elements; _f < _g.length; _f++) {
+                    var element = _g[_f];
                     // write name of indirectly exported entry, i.e. 'export {x} from ...'
-                    exportedNames.push(ts.createPropertyAssignment(ts.createLiteral((element.name || element.propertyName).text), ts.createLiteral(true)));
+                    exportedNames.push(ts.createPropertyAssignment(ts.createLiteral((element.name || element.propertyName).text), ts.createTrue()));
                 }
             }
             var exportedNamesStorageRef = ts.createUniqueName("exportedNames");
             statements.push(ts.createVariableStatement(
             /*modifiers*/ undefined, ts.createVariableDeclarationList([
                 ts.createVariableDeclaration(exportedNamesStorageRef, 
-                /*type*/ undefined, ts.createObjectLiteral(exportedNames, /*location*/ undefined, /*multiline*/ true))
+                /*type*/ undefined, ts.createObjectLiteral(exportedNames, /*multiline*/ true))
             ])));
-            return addExportStarFunction(statements, exportedNamesStorageRef);
+            var exportStarFunction = createExportStarFunction(exportedNamesStorageRef);
+            statements.push(exportStarFunction);
+            return exportStarFunction.name;
+        }
+        /**
+         * Creates an exportStar function for the file, with an optional set of excluded local
+         * names.
+         *
+         * @param localNames An optional reference to an object containing a set of excluded local
+         * names.
+         */
+        function createExportStarFunction(localNames) {
+            var exportStarFunction = ts.createUniqueName("exportStar");
+            var m = ts.createIdentifier("m");
+            var n = ts.createIdentifier("n");
+            var exports = ts.createIdentifier("exports");
+            var condition = ts.createStrictInequality(n, ts.createLiteral("default"));
+            if (localNames) {
+                condition = ts.createLogicalAnd(condition, ts.createLogicalNot(ts.createCall(ts.createPropertyAccess(localNames, "hasOwnProperty"), 
+                /*typeArguments*/ undefined, [n])));
+            }
+            return ts.createFunctionDeclaration(
+            /*decorators*/ undefined, 
+            /*modifiers*/ undefined, 
+            /*asteriskToken*/ undefined, exportStarFunction, 
+            /*typeParameters*/ undefined, [ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, m)], 
+            /*type*/ undefined, ts.createBlock([
+                ts.createVariableStatement(
+                /*modifiers*/ undefined, ts.createVariableDeclarationList([
+                    ts.createVariableDeclaration(exports, 
+                    /*type*/ undefined, ts.createObjectLiteral([]))
+                ])),
+                ts.createForIn(ts.createVariableDeclarationList([
+                    ts.createVariableDeclaration(n, /*type*/ undefined)
+                ]), m, ts.createBlock([
+                    ts.setEmitFlags(ts.createIf(condition, ts.createStatement(ts.createAssignment(ts.createElementAccess(exports, n), ts.createElementAccess(m, n)))), 1 /* SingleLine */)
+                ])),
+                ts.createStatement(ts.createCall(exportFunction, 
+                /*typeArguments*/ undefined, [exports]))
+            ], /*multiline*/ true));
         }
         /**
-         * Emits a setter callback for each dependency group.
-         * @param write The callback used to write each callback.
+         * Creates an array setter callbacks for each dependency group.
+         *
+         * @param exportStarFunction A reference to an exportStarFunction for the file.
+         * @param dependencyGroups An array of grouped dependencies.
          */
-        function generateSetters(exportStarFunction, dependencyGroups) {
+        function createSettersArray(exportStarFunction, dependencyGroups) {
             var setters = [];
             for (var _i = 0, dependencyGroups_1 = dependencyGroups; _i < dependencyGroups_1.length; _i++) {
                 var group = dependencyGroups_1[_i];
@@ -54688,19 +65944,19 @@ var ts;
                     var entry = _b[_a];
                     var importVariableName = ts.getLocalNameForExternalImport(entry, currentSourceFile);
                     switch (entry.kind) {
-                        case 230 /* ImportDeclaration */:
+                        case 238 /* ImportDeclaration */:
                             if (!entry.importClause) {
                                 // 'import "..."' case
                                 // module is imported only for side-effects, no emit required
                                 break;
                             }
-                        // fall-through
-                        case 229 /* ImportEqualsDeclaration */:
+                        // falls through
+                        case 237 /* ImportEqualsDeclaration */:
                             ts.Debug.assert(importVariableName !== undefined);
                             // save import into the local
                             statements.push(ts.createStatement(ts.createAssignment(importVariableName, parameterName)));
                             break;
-                        case 236 /* ExportDeclaration */:
+                        case 244 /* ExportDeclaration */:
                             ts.Debug.assert(importVariableName !== undefined);
                             if (entry.exportClause) {
                                 //  export {a, b as c} from 'foo'
@@ -54716,8 +65972,8 @@ var ts;
                                     var e = _d[_c];
                                     properties.push(ts.createPropertyAssignment(ts.createLiteral(e.name.text), ts.createElementAccess(parameterName, ts.createLiteral((e.propertyName || e.name).text))));
                                 }
-                                statements.push(ts.createStatement(ts.createCall(exportFunctionForFile, 
-                                /*typeArguments*/ undefined, [ts.createObjectLiteral(properties, /*location*/ undefined, /*multiline*/ true)])));
+                                statements.push(ts.createStatement(ts.createCall(exportFunction, 
+                                /*typeArguments*/ undefined, [ts.createObjectLiteral(properties, /*multiline*/ true)])));
                             }
                             else {
                                 //  export * from 'foo'
@@ -54732,386 +65988,658 @@ var ts;
                     }
                 }
                 setters.push(ts.createFunctionExpression(
+                /*modifiers*/ undefined, 
                 /*asteriskToken*/ undefined, 
                 /*name*/ undefined, 
-                /*typeParameters*/ undefined, [ts.createParameter(parameterName)], 
-                /*type*/ undefined, ts.createBlock(statements, /*location*/ undefined, /*multiLine*/ true)));
+                /*typeParameters*/ undefined, [ts.createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, parameterName)], 
+                /*type*/ undefined, ts.createBlock(statements, /*multiLine*/ true)));
             }
-            return ts.createArrayLiteral(setters, /*location*/ undefined, /*multiLine*/ true);
+            return ts.createArrayLiteral(setters, /*multiLine*/ true);
         }
-        function visitSourceElement(node) {
+        //
+        // Top-level Source Element Visitors
+        //
+        /**
+         * Visit source elements at the top-level of a module.
+         *
+         * @param node The node to visit.
+         */
+        function sourceElementVisitor(node) {
             switch (node.kind) {
-                case 230 /* ImportDeclaration */:
+                case 238 /* ImportDeclaration */:
                     return visitImportDeclaration(node);
-                case 229 /* ImportEqualsDeclaration */:
+                case 237 /* ImportEqualsDeclaration */:
                     return visitImportEqualsDeclaration(node);
-                case 236 /* ExportDeclaration */:
-                    return visitExportDeclaration(node);
-                case 235 /* ExportAssignment */:
+                case 244 /* ExportDeclaration */:
+                    // ExportDeclarations are elided as they are handled via
+                    // `appendExportsOfDeclaration`.
+                    return undefined;
+                case 243 /* ExportAssignment */:
                     return visitExportAssignment(node);
                 default:
-                    return visitNestedNode(node);
-            }
-        }
-        function visitNestedNode(node) {
-            var savedEnclosingBlockScopedContainer = enclosingBlockScopedContainer;
-            var savedCurrentParent = currentParent;
-            var savedCurrentNode = currentNode;
-            var currentGrandparent = currentParent;
-            currentParent = currentNode;
-            currentNode = node;
-            if (currentParent && ts.isBlockScope(currentParent, currentGrandparent)) {
-                enclosingBlockScopedContainer = currentParent;
-            }
-            var result = visitNestedNodeWorker(node);
-            enclosingBlockScopedContainer = savedEnclosingBlockScopedContainer;
-            currentParent = savedCurrentParent;
-            currentNode = savedCurrentNode;
-            return result;
-        }
-        function visitNestedNodeWorker(node) {
-            switch (node.kind) {
-                case 200 /* VariableStatement */:
-                    return visitVariableStatement(node);
-                case 220 /* FunctionDeclaration */:
-                    return visitFunctionDeclaration(node);
-                case 221 /* ClassDeclaration */:
-                    return visitClassDeclaration(node);
-                case 206 /* ForStatement */:
-                    return visitForStatement(node);
-                case 207 /* ForInStatement */:
-                    return visitForInStatement(node);
-                case 208 /* ForOfStatement */:
-                    return visitForOfStatement(node);
-                case 204 /* DoStatement */:
-                    return visitDoStatement(node);
-                case 205 /* WhileStatement */:
-                    return visitWhileStatement(node);
-                case 214 /* LabeledStatement */:
-                    return visitLabeledStatement(node);
-                case 212 /* WithStatement */:
-                    return visitWithStatement(node);
-                case 213 /* SwitchStatement */:
-                    return visitSwitchStatement(node);
-                case 227 /* CaseBlock */:
-                    return visitCaseBlock(node);
-                case 249 /* CaseClause */:
-                    return visitCaseClause(node);
-                case 250 /* DefaultClause */:
-                    return visitDefaultClause(node);
-                case 216 /* TryStatement */:
-                    return visitTryStatement(node);
-                case 252 /* CatchClause */:
-                    return visitCatchClause(node);
-                case 199 /* Block */:
-                    return visitBlock(node);
-                case 202 /* ExpressionStatement */:
-                    return visitExpressionStatement(node);
-                default:
-                    return node;
+                    return nestedElementVisitor(node);
             }
         }
+        /**
+         * Visits an ImportDeclaration node.
+         *
+         * @param node The node to visit.
+         */
         function visitImportDeclaration(node) {
-            if (node.importClause && ts.contains(externalImports, node)) {
+            var statements;
+            if (node.importClause) {
                 hoistVariableDeclaration(ts.getLocalNameForExternalImport(node, currentSourceFile));
             }
-            return undefined;
+            if (hasAssociatedEndOfDeclarationMarker(node)) {
+                // Defer exports until we encounter an EndOfDeclarationMarker node
+                var id = ts.getOriginalNodeId(node);
+                deferredExports[id] = appendExportsOfImportDeclaration(deferredExports[id], node);
+            }
+            else {
+                statements = appendExportsOfImportDeclaration(statements, node);
+            }
+            return ts.singleOrMany(statements);
         }
+        /**
+         * Visits an ImportEqualsDeclaration node.
+         *
+         * @param node The node to visit.
+         */
         function visitImportEqualsDeclaration(node) {
-            if (ts.contains(externalImports, node)) {
-                hoistVariableDeclaration(ts.getLocalNameForExternalImport(node, currentSourceFile));
+            ts.Debug.assert(ts.isExternalModuleImportEqualsDeclaration(node), "import= for internal module references should be handled in an earlier transformer.");
+            var statements;
+            hoistVariableDeclaration(ts.getLocalNameForExternalImport(node, currentSourceFile));
+            if (hasAssociatedEndOfDeclarationMarker(node)) {
+                // Defer exports until we encounter an EndOfDeclarationMarker node
+                var id = ts.getOriginalNodeId(node);
+                deferredExports[id] = appendExportsOfImportEqualsDeclaration(deferredExports[id], node);
             }
-            // NOTE(rbuckton): Do we support export import = require('') in System?
-            return undefined;
+            else {
+                statements = appendExportsOfImportEqualsDeclaration(statements, node);
+            }
+            return ts.singleOrMany(statements);
         }
-        function visitExportDeclaration(node) {
-            if (!node.moduleSpecifier) {
-                var statements = [];
-                ts.addRange(statements, ts.map(node.exportClause.elements, visitExportSpecifier));
-                return statements;
+        /**
+         * Visits an ExportAssignment node.
+         *
+         * @param node The node to visit.
+         */
+        function visitExportAssignment(node) {
+            if (node.isExportEquals) {
+                // Elide `export=` as it is illegal in a SystemJS module.
+                return undefined;
+            }
+            var expression = ts.visitNode(node.expression, destructuringAndImportCallVisitor, ts.isExpression);
+            var original = node.original;
+            if (original && hasAssociatedEndOfDeclarationMarker(original)) {
+                // Defer exports until we encounter an EndOfDeclarationMarker node
+                var id = ts.getOriginalNodeId(node);
+                deferredExports[id] = appendExportStatement(deferredExports[id], ts.createIdentifier("default"), expression, /*allowComments*/ true);
+            }
+            else {
+                return createExportStatement(ts.createIdentifier("default"), expression, /*allowComments*/ true);
             }
-            return undefined;
         }
-        function visitExportSpecifier(specifier) {
-            if (resolver.getReferencedValueDeclaration(specifier.propertyName || specifier.name)
-                || resolver.isValueAliasDeclaration(specifier)) {
-                recordExportName(specifier.name);
-                return createExportStatement(specifier.name, specifier.propertyName || specifier.name);
+        /**
+         * Visits a FunctionDeclaration, hoisting it to the outer module body function.
+         *
+         * @param node The node to visit.
+         */
+        function visitFunctionDeclaration(node) {
+            if (ts.hasModifier(node, 1 /* Export */)) {
+                hoistedStatements = ts.append(hoistedStatements, ts.updateFunctionDeclaration(node, node.decorators, ts.visitNodes(node.modifiers, modifierVisitor, ts.isModifier), node.asteriskToken, ts.getDeclarationName(node, /*allowComments*/ true, /*allowSourceMaps*/ true), 
+                /*typeParameters*/ undefined, ts.visitNodes(node.parameters, destructuringAndImportCallVisitor, ts.isParameterDeclaration), 
+                /*type*/ undefined, ts.visitNode(node.body, destructuringAndImportCallVisitor, ts.isBlock)));
+            }
+            else {
+                hoistedStatements = ts.append(hoistedStatements, ts.visitEachChild(node, destructuringAndImportCallVisitor, context));
+            }
+            if (hasAssociatedEndOfDeclarationMarker(node)) {
+                // Defer exports until we encounter an EndOfDeclarationMarker node
+                var id = ts.getOriginalNodeId(node);
+                deferredExports[id] = appendExportsOfHoistedDeclaration(deferredExports[id], node);
+            }
+            else {
+                hoistedStatements = appendExportsOfHoistedDeclaration(hoistedStatements, node);
             }
             return undefined;
         }
-        function visitExportAssignment(node) {
-            if (!node.isExportEquals) {
-                if (ts.nodeIsSynthesized(node) || resolver.isValueAliasDeclaration(node)) {
-                    return createExportStatement(ts.createLiteral("default"), node.expression);
-                }
+        /**
+         * Visits a ClassDeclaration, hoisting its name to the outer module body function.
+         *
+         * @param node The node to visit.
+         */
+        function visitClassDeclaration(node) {
+            var statements;
+            // Hoist the name of the class declaration to the outer module body function.
+            var name = ts.getLocalName(node);
+            hoistVariableDeclaration(name);
+            // Rewrite the class declaration into an assignment of a class expression.
+            statements = ts.append(statements, ts.setTextRange(ts.createStatement(ts.createAssignment(name, ts.setTextRange(ts.createClassExpression(
+            /*modifiers*/ undefined, node.name, 
+            /*typeParameters*/ undefined, ts.visitNodes(node.heritageClauses, destructuringAndImportCallVisitor, ts.isHeritageClause), ts.visitNodes(node.members, destructuringAndImportCallVisitor, ts.isClassElement)), node))), node));
+            if (hasAssociatedEndOfDeclarationMarker(node)) {
+                // Defer exports until we encounter an EndOfDeclarationMarker node
+                var id = ts.getOriginalNodeId(node);
+                deferredExports[id] = appendExportsOfHoistedDeclaration(deferredExports[id], node);
             }
-            return undefined;
+            else {
+                statements = appendExportsOfHoistedDeclaration(statements, node);
+            }
+            return ts.singleOrMany(statements);
         }
         /**
          * Visits a variable statement, hoisting declared names to the top-level module body.
          * Each declaration is rewritten into an assignment expression.
          *
-         * @param node The variable statement to visit.
+         * @param node The node to visit.
          */
         function visitVariableStatement(node) {
-            // hoist only non-block scoped declarations or block scoped declarations parented by source file
-            var shouldHoist = ((ts.getCombinedNodeFlags(ts.getOriginalNode(node.declarationList)) & 3 /* BlockScoped */) == 0) ||
-                enclosingBlockScopedContainer.kind === 256 /* SourceFile */;
-            if (!shouldHoist) {
-                return node;
+            if (!shouldHoistVariableDeclarationList(node.declarationList)) {
+                return ts.visitNode(node, destructuringAndImportCallVisitor, ts.isStatement);
             }
-            var isExported = ts.hasModifier(node, 1 /* Export */);
-            var expressions = [];
+            var expressions;
+            var isExportedDeclaration = ts.hasModifier(node, 1 /* Export */);
+            var isMarkedDeclaration = hasAssociatedEndOfDeclarationMarker(node);
             for (var _i = 0, _a = node.declarationList.declarations; _i < _a.length; _i++) {
                 var variable = _a[_i];
-                var visited = transformVariable(variable, isExported);
-                if (visited) {
-                    expressions.push(visited);
+                if (variable.initializer) {
+                    expressions = ts.append(expressions, transformInitializedVariable(variable, isExportedDeclaration && !isMarkedDeclaration));
+                }
+                else {
+                    hoistBindingElement(variable);
                 }
             }
-            if (expressions.length) {
-                return ts.createStatement(ts.inlineExpressions(expressions), node);
+            var statements;
+            if (expressions) {
+                statements = ts.append(statements, ts.setTextRange(ts.createStatement(ts.inlineExpressions(expressions)), node));
             }
-            return undefined;
+            if (isMarkedDeclaration) {
+                // Defer exports until we encounter an EndOfDeclarationMarker node
+                var id = ts.getOriginalNodeId(node);
+                deferredExports[id] = appendExportsOfVariableStatement(deferredExports[id], node, isExportedDeclaration);
+            }
+            else {
+                statements = appendExportsOfVariableStatement(statements, node, /*exportSelf*/ false);
+            }
+            return ts.singleOrMany(statements);
         }
         /**
-         * Transforms a VariableDeclaration into one or more assignment expressions.
+         * Hoists the declared names of a VariableDeclaration or BindingElement.
          *
-         * @param node The VariableDeclaration to transform.
-         * @param isExported A value used to indicate whether the containing statement was exported.
-         */
-        function transformVariable(node, isExported) {
-            // Hoist any bound names within the declaration.
-            hoistBindingElement(node, isExported);
-            if (!node.initializer) {
-                // If the variable has no initializer, ignore it.
-                return;
-            }
-            var name = node.name;
-            if (ts.isIdentifier(name)) {
-                // If the variable has an IdentifierName, write out an assignment expression in its place.
-                return ts.createAssignment(name, node.initializer);
+         * @param node The declaration to hoist.
+         */
+        function hoistBindingElement(node) {
+            if (ts.isBindingPattern(node.name)) {
+                for (var _i = 0, _a = node.name.elements; _i < _a.length; _i++) {
+                    var element = _a[_i];
+                    if (!ts.isOmittedExpression(element)) {
+                        hoistBindingElement(element);
+                    }
+                }
             }
             else {
-                // If the variable has a BindingPattern, flatten the variable into multiple assignment expressions.
-                return ts.flattenVariableDestructuringToExpression(context, node, hoistVariableDeclaration);
+                hoistVariableDeclaration(ts.getSynthesizedClone(node.name));
             }
         }
         /**
-         * Visits a FunctionDeclaration, hoisting it to the outer module body function.
+         * Determines whether a VariableDeclarationList should be hoisted.
          *
-         * @param node The function declaration to visit.
+         * @param node The node to test.
          */
-        function visitFunctionDeclaration(node) {
-            if (ts.hasModifier(node, 1 /* Export */)) {
-                // If the function is exported, ensure it has a name and rewrite the function without any export flags.
-                var name_42 = node.name || ts.getGeneratedNameForNode(node);
-                var newNode = ts.createFunctionDeclaration(
-                /*decorators*/ undefined, 
-                /*modifiers*/ undefined, node.asteriskToken, name_42, 
-                /*typeParameters*/ undefined, node.parameters, 
-                /*type*/ undefined, node.body, 
-                /*location*/ node);
-                // Record a declaration export in the outer module body function.
-                recordExportedFunctionDeclaration(node);
-                if (!ts.hasModifier(node, 512 /* Default */)) {
-                    recordExportName(name_42);
+        function shouldHoistVariableDeclarationList(node) {
+            // hoist only non-block scoped declarations or block scoped declarations parented by source file
+            return (ts.getEmitFlags(node) & 2097152 /* NoHoisting */) === 0
+                && (enclosingBlockScopedContainer.kind === 265 /* SourceFile */
+                    || (ts.getOriginalNode(node).flags & 3 /* BlockScoped */) === 0);
+        }
+        /**
+         * Transform an initialized variable declaration into an expression.
+         *
+         * @param node The node to transform.
+         * @param isExportedDeclaration A value indicating whether the variable is exported.
+         */
+        function transformInitializedVariable(node, isExportedDeclaration) {
+            var createAssignment = isExportedDeclaration ? createExportedVariableAssignment : createNonExportedVariableAssignment;
+            return ts.isBindingPattern(node.name)
+                ? ts.flattenDestructuringAssignment(node, destructuringAndImportCallVisitor, context, 0 /* All */, 
+                /*needsValue*/ false, createAssignment)
+                : createAssignment(node.name, ts.visitNode(node.initializer, destructuringAndImportCallVisitor, ts.isExpression));
+        }
+        /**
+         * Creates an assignment expression for an exported variable declaration.
+         *
+         * @param name The name of the variable.
+         * @param value The value of the variable's initializer.
+         * @param location The source map location for the assignment.
+         */
+        function createExportedVariableAssignment(name, value, location) {
+            return createVariableAssignment(name, value, location, /*isExportedDeclaration*/ true);
+        }
+        /**
+         * Creates an assignment expression for a non-exported variable declaration.
+         *
+         * @param name The name of the variable.
+         * @param value The value of the variable's initializer.
+         * @param location The source map location for the assignment.
+         */
+        function createNonExportedVariableAssignment(name, value, location) {
+            return createVariableAssignment(name, value, location, /*isExportedDeclaration*/ false);
+        }
+        /**
+         * Creates an assignment expression for a variable declaration.
+         *
+         * @param name The name of the variable.
+         * @param value The value of the variable's initializer.
+         * @param location The source map location for the assignment.
+         * @param isExportedDeclaration A value indicating whether the variable is exported.
+         */
+        function createVariableAssignment(name, value, location, isExportedDeclaration) {
+            hoistVariableDeclaration(ts.getSynthesizedClone(name));
+            return isExportedDeclaration
+                ? createExportExpression(name, preventSubstitution(ts.setTextRange(ts.createAssignment(name, value), location)))
+                : preventSubstitution(ts.setTextRange(ts.createAssignment(name, value), location));
+        }
+        /**
+         * Visits a MergeDeclarationMarker used as a placeholder for the beginning of a merged
+         * and transformed declaration.
+         *
+         * @param node The node to visit.
+         */
+        function visitMergeDeclarationMarker(node) {
+            // For an EnumDeclaration or ModuleDeclaration that merges with a preceeding
+            // declaration we do not emit a leading variable declaration. To preserve the
+            // begin/end semantics of the declararation and to properly handle exports
+            // we wrapped the leading variable declaration in a `MergeDeclarationMarker`.
+            //
+            // To balance the declaration, we defer the exports of the elided variable
+            // statement until we visit this declaration's `EndOfDeclarationMarker`.
+            if (hasAssociatedEndOfDeclarationMarker(node) && node.original.kind === 208 /* VariableStatement */) {
+                var id = ts.getOriginalNodeId(node);
+                var isExportedDeclaration = ts.hasModifier(node.original, 1 /* Export */);
+                deferredExports[id] = appendExportsOfVariableStatement(deferredExports[id], node.original, isExportedDeclaration);
+            }
+            return node;
+        }
+        /**
+         * Determines whether a node has an associated EndOfDeclarationMarker.
+         *
+         * @param node The node to test.
+         */
+        function hasAssociatedEndOfDeclarationMarker(node) {
+            return (ts.getEmitFlags(node) & 4194304 /* HasEndOfDeclarationMarker */) !== 0;
+        }
+        /**
+         * Visits a DeclarationMarker used as a placeholder for the end of a transformed
+         * declaration.
+         *
+         * @param node The node to visit.
+         */
+        function visitEndOfDeclarationMarker(node) {
+            // For some transformations we emit an `EndOfDeclarationMarker` to mark the actual
+            // end of the transformed declaration. We use this marker to emit any deferred exports
+            // of the declaration.
+            var id = ts.getOriginalNodeId(node);
+            var statements = deferredExports[id];
+            if (statements) {
+                delete deferredExports[id];
+                return ts.append(statements, node);
+            }
+            return node;
+        }
+        /**
+         * Appends the exports of an ImportDeclaration to a statement list, returning the
+         * statement list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param decl The declaration whose exports are to be recorded.
+         */
+        function appendExportsOfImportDeclaration(statements, decl) {
+            if (moduleInfo.exportEquals) {
+                return statements;
+            }
+            var importClause = decl.importClause;
+            if (!importClause) {
+                return statements;
+            }
+            if (importClause.name) {
+                statements = appendExportsOfDeclaration(statements, importClause);
+            }
+            var namedBindings = importClause.namedBindings;
+            if (namedBindings) {
+                switch (namedBindings.kind) {
+                    case 240 /* NamespaceImport */:
+                        statements = appendExportsOfDeclaration(statements, namedBindings);
+                        break;
+                    case 241 /* NamedImports */:
+                        for (var _i = 0, _a = namedBindings.elements; _i < _a.length; _i++) {
+                            var importBinding = _a[_i];
+                            statements = appendExportsOfDeclaration(statements, importBinding);
+                        }
+                        break;
                 }
-                ts.setOriginalNode(newNode, node);
-                node = newNode;
             }
-            // Hoist the function declaration to the outer module body function.
-            hoistFunctionDeclaration(node);
-            return undefined;
+            return statements;
         }
-        function visitExpressionStatement(node) {
-            var originalNode = ts.getOriginalNode(node);
-            if ((originalNode.kind === 225 /* ModuleDeclaration */ || originalNode.kind === 224 /* EnumDeclaration */) && ts.hasModifier(originalNode, 1 /* Export */)) {
-                var name_43 = getDeclarationName(originalNode);
-                // We only need to hoistVariableDeclaration for EnumDeclaration
-                // as ModuleDeclaration is already hoisted when the transformer call visitVariableStatement
-                // which then call transformsVariable for each declaration in declarationList
-                if (originalNode.kind === 224 /* EnumDeclaration */) {
-                    hoistVariableDeclaration(name_43);
+        /**
+         * Appends the export of an ImportEqualsDeclaration to a statement list, returning the
+         * statement list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param decl The declaration whose exports are to be recorded.
+         */
+        function appendExportsOfImportEqualsDeclaration(statements, decl) {
+            if (moduleInfo.exportEquals) {
+                return statements;
+            }
+            return appendExportsOfDeclaration(statements, decl);
+        }
+        /**
+         * Appends the exports of a VariableStatement to a statement list, returning the statement
+         * list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param node The VariableStatement whose exports are to be recorded.
+         * @param exportSelf A value indicating whether to also export each VariableDeclaration of
+         * `nodes` declaration list.
+         */
+        function appendExportsOfVariableStatement(statements, node, exportSelf) {
+            if (moduleInfo.exportEquals) {
+                return statements;
+            }
+            for (var _i = 0, _a = node.declarationList.declarations; _i < _a.length; _i++) {
+                var decl = _a[_i];
+                if (decl.initializer || exportSelf) {
+                    statements = appendExportsOfBindingElement(statements, decl, exportSelf);
                 }
-                return [
-                    node,
-                    createExportStatement(name_43, name_43)
-                ];
             }
-            return node;
+            return statements;
         }
         /**
-         * Visits a ClassDeclaration, hoisting its name to the outer module body function.
+         * Appends the exports of a VariableDeclaration or BindingElement to a statement list,
+         * returning the statement list.
          *
-         * @param node The class declaration to visit.
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param decl The declaration whose exports are to be recorded.
+         * @param exportSelf A value indicating whether to also export the declaration itself.
          */
-        function visitClassDeclaration(node) {
-            // Hoist the name of the class declaration to the outer module body function.
-            var name = getDeclarationName(node);
-            hoistVariableDeclaration(name);
-            var statements = [];
-            // Rewrite the class declaration into an assignment of a class expression.
-            statements.push(ts.createStatement(ts.createAssignment(name, ts.createClassExpression(
-            /*modifiers*/ undefined, node.name, 
-            /*typeParameters*/ undefined, node.heritageClauses, node.members, 
-            /*location*/ node)), 
-            /*location*/ node));
-            // If the class was exported, write a declaration export to the inner module body function.
-            if (ts.hasModifier(node, 1 /* Export */)) {
-                if (!ts.hasModifier(node, 512 /* Default */)) {
-                    recordExportName(name);
+        function appendExportsOfBindingElement(statements, decl, exportSelf) {
+            if (moduleInfo.exportEquals) {
+                return statements;
+            }
+            if (ts.isBindingPattern(decl.name)) {
+                for (var _i = 0, _a = decl.name.elements; _i < _a.length; _i++) {
+                    var element = _a[_i];
+                    if (!ts.isOmittedExpression(element)) {
+                        statements = appendExportsOfBindingElement(statements, element, exportSelf);
+                    }
+                }
+            }
+            else if (!ts.isGeneratedIdentifier(decl.name)) {
+                var excludeName = void 0;
+                if (exportSelf) {
+                    statements = appendExportStatement(statements, decl.name, ts.getLocalName(decl));
+                    excludeName = decl.name.text;
+                }
+                statements = appendExportsOfDeclaration(statements, decl, excludeName);
+            }
+            return statements;
+        }
+        /**
+         * Appends the exports of a ClassDeclaration or FunctionDeclaration to a statement list,
+         * returning the statement list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param decl The declaration whose exports are to be recorded.
+         */
+        function appendExportsOfHoistedDeclaration(statements, decl) {
+            if (moduleInfo.exportEquals) {
+                return statements;
+            }
+            var excludeName;
+            if (ts.hasModifier(decl, 1 /* Export */)) {
+                var exportName = ts.hasModifier(decl, 512 /* Default */) ? ts.createLiteral("default") : decl.name;
+                statements = appendExportStatement(statements, exportName, ts.getLocalName(decl));
+                excludeName = exportName.text;
+            }
+            if (decl.name) {
+                statements = appendExportsOfDeclaration(statements, decl, excludeName);
+            }
+            return statements;
+        }
+        /**
+         * Appends the exports of a declaration to a statement list, returning the statement list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param decl The declaration to export.
+         * @param excludeName An optional name to exclude from exports.
+         */
+        function appendExportsOfDeclaration(statements, decl, excludeName) {
+            if (moduleInfo.exportEquals) {
+                return statements;
+            }
+            var name = ts.getDeclarationName(decl);
+            var exportSpecifiers = moduleInfo.exportSpecifiers.get(name.text);
+            if (exportSpecifiers) {
+                for (var _i = 0, exportSpecifiers_2 = exportSpecifiers; _i < exportSpecifiers_2.length; _i++) {
+                    var exportSpecifier = exportSpecifiers_2[_i];
+                    if (exportSpecifier.name.text !== excludeName) {
+                        statements = appendExportStatement(statements, exportSpecifier.name, name);
+                    }
                 }
-                statements.push(createDeclarationExport(node));
             }
-            return statements;
-        }
-        function shouldHoistLoopInitializer(node) {
-            return ts.isVariableDeclarationList(node) && (ts.getCombinedNodeFlags(node) & 3 /* BlockScoped */) === 0;
+            return statements;
+        }
+        /**
+         * Appends the down-level representation of an export to a statement list, returning the
+         * statement list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param exportName The name of the export.
+         * @param expression The expression to export.
+         * @param allowComments Whether to allow comments on the export.
+         */
+        function appendExportStatement(statements, exportName, expression, allowComments) {
+            statements = ts.append(statements, createExportStatement(exportName, expression, allowComments));
+            return statements;
+        }
+        /**
+         * Creates a call to the current file's export function to export a value.
+         *
+         * @param name The bound name of the export.
+         * @param value The exported value.
+         * @param allowComments An optional value indicating whether to emit comments for the statement.
+         */
+        function createExportStatement(name, value, allowComments) {
+            var statement = ts.createStatement(createExportExpression(name, value));
+            ts.startOnNewLine(statement);
+            if (!allowComments) {
+                ts.setEmitFlags(statement, 1536 /* NoComments */);
+            }
+            return statement;
+        }
+        /**
+         * Creates a call to the current file's export function to export a value.
+         *
+         * @param name The bound name of the export.
+         * @param value The exported value.
+         */
+        function createExportExpression(name, value) {
+            var exportName = ts.isIdentifier(name) ? ts.createLiteral(name) : name;
+            return ts.createCall(exportFunction, /*typeArguments*/ undefined, [exportName, value]);
+        }
+        //
+        // Top-Level or Nested Source Element Visitors
+        //
+        /**
+         * Visit nested elements at the top-level of a module.
+         *
+         * @param node The node to visit.
+         */
+        function nestedElementVisitor(node) {
+            switch (node.kind) {
+                case 208 /* VariableStatement */:
+                    return visitVariableStatement(node);
+                case 228 /* FunctionDeclaration */:
+                    return visitFunctionDeclaration(node);
+                case 229 /* ClassDeclaration */:
+                    return visitClassDeclaration(node);
+                case 214 /* ForStatement */:
+                    return visitForStatement(node);
+                case 215 /* ForInStatement */:
+                    return visitForInStatement(node);
+                case 216 /* ForOfStatement */:
+                    return visitForOfStatement(node);
+                case 212 /* DoStatement */:
+                    return visitDoStatement(node);
+                case 213 /* WhileStatement */:
+                    return visitWhileStatement(node);
+                case 222 /* LabeledStatement */:
+                    return visitLabeledStatement(node);
+                case 220 /* WithStatement */:
+                    return visitWithStatement(node);
+                case 221 /* SwitchStatement */:
+                    return visitSwitchStatement(node);
+                case 235 /* CaseBlock */:
+                    return visitCaseBlock(node);
+                case 257 /* CaseClause */:
+                    return visitCaseClause(node);
+                case 258 /* DefaultClause */:
+                    return visitDefaultClause(node);
+                case 224 /* TryStatement */:
+                    return visitTryStatement(node);
+                case 260 /* CatchClause */:
+                    return visitCatchClause(node);
+                case 207 /* Block */:
+                    return visitBlock(node);
+                case 299 /* MergeDeclarationMarker */:
+                    return visitMergeDeclarationMarker(node);
+                case 300 /* EndOfDeclarationMarker */:
+                    return visitEndOfDeclarationMarker(node);
+                default:
+                    return destructuringAndImportCallVisitor(node);
+            }
         }
         /**
          * Visits the body of a ForStatement to hoist declarations.
          *
-         * @param node The statement to visit.
+         * @param node The node to visit.
          */
         function visitForStatement(node) {
-            var initializer = node.initializer;
-            if (shouldHoistLoopInitializer(initializer)) {
-                var expressions = [];
-                for (var _i = 0, _a = initializer.declarations; _i < _a.length; _i++) {
-                    var variable = _a[_i];
-                    var visited = transformVariable(variable, /*isExported*/ false);
-                    if (visited) {
-                        expressions.push(visited);
-                    }
-                }
-                ;
-                return ts.createFor(expressions.length
-                    ? ts.inlineExpressions(expressions)
-                    : ts.createSynthesizedNode(193 /* OmittedExpression */), node.condition, node.incrementor, ts.visitNode(node.statement, visitNestedNode, ts.isStatement), 
-                /*location*/ node);
-            }
-            else {
-                return ts.visitEachChild(node, visitNestedNode, context);
-            }
-        }
-        /**
-         * Transforms and hoists the declaration list of a ForInStatement or ForOfStatement into an expression.
-         *
-         * @param node The decalaration list to transform.
-         */
-        function transformForBinding(node) {
-            var firstDeclaration = ts.firstOrUndefined(node.declarations);
-            hoistBindingElement(firstDeclaration, /*isExported*/ false);
-            var name = firstDeclaration.name;
-            return ts.isIdentifier(name)
-                ? name
-                : ts.flattenVariableDestructuringToExpression(context, firstDeclaration, hoistVariableDeclaration);
+            var savedEnclosingBlockScopedContainer = enclosingBlockScopedContainer;
+            enclosingBlockScopedContainer = node;
+            node = ts.updateFor(node, visitForInitializer(node.initializer), ts.visitNode(node.condition, destructuringAndImportCallVisitor, ts.isExpression), ts.visitNode(node.incrementor, destructuringAndImportCallVisitor, ts.isExpression), ts.visitNode(node.statement, nestedElementVisitor, ts.isStatement));
+            enclosingBlockScopedContainer = savedEnclosingBlockScopedContainer;
+            return node;
         }
         /**
          * Visits the body of a ForInStatement to hoist declarations.
          *
-         * @param node The statement to visit.
+         * @param node The node to visit.
          */
         function visitForInStatement(node) {
-            var initializer = node.initializer;
-            if (shouldHoistLoopInitializer(initializer)) {
-                var updated = ts.getMutableClone(node);
-                updated.initializer = transformForBinding(initializer);
-                updated.statement = ts.visitNode(node.statement, visitNestedNode, ts.isStatement, /*optional*/ false, ts.liftToBlock);
-                return updated;
-            }
-            else {
-                return ts.visitEachChild(node, visitNestedNode, context);
-            }
+            var savedEnclosingBlockScopedContainer = enclosingBlockScopedContainer;
+            enclosingBlockScopedContainer = node;
+            node = ts.updateForIn(node, visitForInitializer(node.initializer), ts.visitNode(node.expression, destructuringAndImportCallVisitor, ts.isExpression), ts.visitNode(node.statement, nestedElementVisitor, ts.isStatement, ts.liftToBlock));
+            enclosingBlockScopedContainer = savedEnclosingBlockScopedContainer;
+            return node;
         }
         /**
          * Visits the body of a ForOfStatement to hoist declarations.
          *
-         * @param node The statement to visit.
+         * @param node The node to visit.
          */
         function visitForOfStatement(node) {
-            var initializer = node.initializer;
-            if (shouldHoistLoopInitializer(initializer)) {
-                var updated = ts.getMutableClone(node);
-                updated.initializer = transformForBinding(initializer);
-                updated.statement = ts.visitNode(node.statement, visitNestedNode, ts.isStatement, /*optional*/ false, ts.liftToBlock);
-                return updated;
+            var savedEnclosingBlockScopedContainer = enclosingBlockScopedContainer;
+            enclosingBlockScopedContainer = node;
+            node = ts.updateForOf(node, node.awaitModifier, visitForInitializer(node.initializer), ts.visitNode(node.expression, destructuringAndImportCallVisitor, ts.isExpression), ts.visitNode(node.statement, nestedElementVisitor, ts.isStatement, ts.liftToBlock));
+            enclosingBlockScopedContainer = savedEnclosingBlockScopedContainer;
+            return node;
+        }
+        /**
+         * Determines whether to hoist the initializer of a ForStatement, ForInStatement, or
+         * ForOfStatement.
+         *
+         * @param node The node to test.
+         */
+        function shouldHoistForInitializer(node) {
+            return ts.isVariableDeclarationList(node)
+                && shouldHoistVariableDeclarationList(node);
+        }
+        /**
+         * Visits the initializer of a ForStatement, ForInStatement, or ForOfStatement
+         *
+         * @param node The node to visit.
+         */
+        function visitForInitializer(node) {
+            if (!node) {
+                return node;
+            }
+            if (shouldHoistForInitializer(node)) {
+                var expressions = void 0;
+                for (var _i = 0, _a = node.declarations; _i < _a.length; _i++) {
+                    var variable = _a[_i];
+                    expressions = ts.append(expressions, transformInitializedVariable(variable, /*isExportedDeclaration*/ false));
+                }
+                return expressions ? ts.inlineExpressions(expressions) : ts.createOmittedExpression();
             }
             else {
-                return ts.visitEachChild(node, visitNestedNode, context);
+                return ts.visitEachChild(node, nestedElementVisitor, context);
             }
         }
         /**
          * Visits the body of a DoStatement to hoist declarations.
          *
-         * @param node The statement to visit.
+         * @param node The node to visit.
          */
         function visitDoStatement(node) {
-            var statement = ts.visitNode(node.statement, visitNestedNode, ts.isStatement, /*optional*/ false, ts.liftToBlock);
-            if (statement !== node.statement) {
-                var updated = ts.getMutableClone(node);
-                updated.statement = statement;
-                return updated;
-            }
-            return node;
+            return ts.updateDo(node, ts.visitNode(node.statement, nestedElementVisitor, ts.isStatement, ts.liftToBlock), ts.visitNode(node.expression, destructuringAndImportCallVisitor, ts.isExpression));
         }
         /**
          * Visits the body of a WhileStatement to hoist declarations.
          *
-         * @param node The statement to visit.
+         * @param node The node to visit.
          */
         function visitWhileStatement(node) {
-            var statement = ts.visitNode(node.statement, visitNestedNode, ts.isStatement, /*optional*/ false, ts.liftToBlock);
-            if (statement !== node.statement) {
-                var updated = ts.getMutableClone(node);
-                updated.statement = statement;
-                return updated;
-            }
-            return node;
+            return ts.updateWhile(node, ts.visitNode(node.expression, destructuringAndImportCallVisitor, ts.isExpression), ts.visitNode(node.statement, nestedElementVisitor, ts.isStatement, ts.liftToBlock));
         }
         /**
          * Visits the body of a LabeledStatement to hoist declarations.
          *
-         * @param node The statement to visit.
+         * @param node The node to visit.
          */
         function visitLabeledStatement(node) {
-            var statement = ts.visitNode(node.statement, visitNestedNode, ts.isStatement, /*optional*/ false, ts.liftToBlock);
-            if (statement !== node.statement) {
-                var updated = ts.getMutableClone(node);
-                updated.statement = statement;
-                return updated;
-            }
-            return node;
+            return ts.updateLabel(node, node.label, ts.visitNode(node.statement, nestedElementVisitor, ts.isStatement, ts.liftToBlock));
         }
         /**
          * Visits the body of a WithStatement to hoist declarations.
          *
-         * @param node The statement to visit.
+         * @param node The node to visit.
          */
         function visitWithStatement(node) {
-            var statement = ts.visitNode(node.statement, visitNestedNode, ts.isStatement, /*optional*/ false, ts.liftToBlock);
-            if (statement !== node.statement) {
-                var updated = ts.getMutableClone(node);
-                updated.statement = statement;
-                return updated;
-            }
-            return node;
+            return ts.updateWith(node, ts.visitNode(node.expression, destructuringAndImportCallVisitor, ts.isExpression), ts.visitNode(node.statement, nestedElementVisitor, ts.isStatement, ts.liftToBlock));
         }
         /**
          * Visits the body of a SwitchStatement to hoist declarations.
          *
-         * @param node The statement to visit.
+         * @param node The node to visit.
          */
         function visitSwitchStatement(node) {
-            var caseBlock = ts.visitNode(node.caseBlock, visitNestedNode, ts.isCaseBlock);
-            if (caseBlock !== node.caseBlock) {
-                var updated = ts.getMutableClone(node);
-                updated.caseBlock = caseBlock;
-                return updated;
-            }
-            return node;
+            return ts.updateSwitch(node, ts.visitNode(node.expression, destructuringAndImportCallVisitor, ts.isExpression), ts.visitNode(node.caseBlock, nestedElementVisitor, ts.isCaseBlock));
         }
         /**
          * Visits the body of a CaseBlock to hoist declarations.
@@ -55119,402 +66647,366 @@ var ts;
          * @param node The node to visit.
          */
         function visitCaseBlock(node) {
-            var clauses = ts.visitNodes(node.clauses, visitNestedNode, ts.isCaseOrDefaultClause);
-            if (clauses !== node.clauses) {
-                var updated = ts.getMutableClone(node);
-                updated.clauses = clauses;
-                return updated;
-            }
+            var savedEnclosingBlockScopedContainer = enclosingBlockScopedContainer;
+            enclosingBlockScopedContainer = node;
+            node = ts.updateCaseBlock(node, ts.visitNodes(node.clauses, nestedElementVisitor, ts.isCaseOrDefaultClause));
+            enclosingBlockScopedContainer = savedEnclosingBlockScopedContainer;
             return node;
         }
         /**
          * Visits the body of a CaseClause to hoist declarations.
          *
-         * @param node The clause to visit.
+         * @param node The node to visit.
          */
         function visitCaseClause(node) {
-            var statements = ts.visitNodes(node.statements, visitNestedNode, ts.isStatement);
-            if (statements !== node.statements) {
-                var updated = ts.getMutableClone(node);
-                updated.statements = statements;
-                return updated;
-            }
-            return node;
+            return ts.updateCaseClause(node, ts.visitNode(node.expression, destructuringAndImportCallVisitor, ts.isExpression), ts.visitNodes(node.statements, nestedElementVisitor, ts.isStatement));
         }
         /**
          * Visits the body of a DefaultClause to hoist declarations.
          *
-         * @param node The clause to visit.
+         * @param node The node to visit.
          */
         function visitDefaultClause(node) {
-            return ts.visitEachChild(node, visitNestedNode, context);
+            return ts.visitEachChild(node, nestedElementVisitor, context);
         }
         /**
          * Visits the body of a TryStatement to hoist declarations.
          *
-         * @param node The statement to visit.
+         * @param node The node to visit.
          */
         function visitTryStatement(node) {
-            return ts.visitEachChild(node, visitNestedNode, context);
+            return ts.visitEachChild(node, nestedElementVisitor, context);
         }
         /**
          * Visits the body of a CatchClause to hoist declarations.
          *
-         * @param node The clause to visit.
+         * @param node The node to visit.
          */
         function visitCatchClause(node) {
-            var block = ts.visitNode(node.block, visitNestedNode, ts.isBlock);
-            if (block !== node.block) {
-                var updated = ts.getMutableClone(node);
-                updated.block = block;
-                return updated;
-            }
+            var savedEnclosingBlockScopedContainer = enclosingBlockScopedContainer;
+            enclosingBlockScopedContainer = node;
+            node = ts.updateCatchClause(node, node.variableDeclaration, ts.visitNode(node.block, nestedElementVisitor, ts.isBlock));
+            enclosingBlockScopedContainer = savedEnclosingBlockScopedContainer;
             return node;
         }
         /**
          * Visits the body of a Block to hoist declarations.
          *
-         * @param node The block to visit.
+         * @param node The node to visit.
          */
         function visitBlock(node) {
-            return ts.visitEachChild(node, visitNestedNode, context);
+            var savedEnclosingBlockScopedContainer = enclosingBlockScopedContainer;
+            enclosingBlockScopedContainer = node;
+            node = ts.visitEachChild(node, nestedElementVisitor, context);
+            enclosingBlockScopedContainer = savedEnclosingBlockScopedContainer;
+            return node;
         }
         //
-        // Substitutions
+        // Destructuring Assignment Visitors
         //
-        function onEmitNode(emitContext, node, emitCallback) {
-            if (node.kind === 256 /* SourceFile */) {
-                exportFunctionForFile = exportFunctionForFileMap[ts.getOriginalNodeId(node)];
-                previousOnEmitNode(emitContext, node, emitCallback);
-                exportFunctionForFile = undefined;
-            }
-            else {
-                previousOnEmitNode(emitContext, node, emitCallback);
-            }
-        }
         /**
-         * Hooks node substitutions.
+         * Visit nodes to flatten destructuring assignments to exported symbols.
          *
-         * @param node The node to substitute.
-         * @param isExpression A value indicating whether the node is to be used in an expression
-         *                     position.
+         * @param node The node to visit.
          */
-        function onSubstituteNode(emitContext, node) {
-            node = previousOnSubstituteNode(emitContext, node);
-            if (emitContext === 1 /* Expression */) {
-                return substituteExpression(node);
+        function destructuringAndImportCallVisitor(node) {
+            if (node.transformFlags & 1024 /* DestructuringAssignment */
+                && node.kind === 194 /* BinaryExpression */) {
+                return visitDestructuringAssignment(node);
             }
-            return node;
+            else if (ts.isImportCall(node)) {
+                return visitImportCallExpression(node);
+            }
+            else if ((node.transformFlags & 2048 /* ContainsDestructuringAssignment */) || (node.transformFlags & 67108864 /* ContainsDynamicImport */)) {
+                return ts.visitEachChild(node, destructuringAndImportCallVisitor, context);
+            }
+            else {
+                return node;
+            }
+        }
+        function visitImportCallExpression(node) {
+            // import("./blah")
+            // emit as
+            // System.register([], function (_export, _context) {
+            //     return {
+            //         setters: [],
+            //         execute: () => {
+            //             _context.import('./blah');
+            //         }
+            //     };
+            // });
+            return ts.createCall(ts.createPropertyAccess(contextObject, ts.createIdentifier("import")), 
+            /*typeArguments*/ undefined, node.arguments);
         }
         /**
-         * Substitute the expression, if necessary.
+         * Visits a DestructuringAssignment to flatten destructuring to exported symbols.
          *
-         * @param node The node to substitute.
+         * @param node The node to visit.
          */
-        function substituteExpression(node) {
-            switch (node.kind) {
-                case 69 /* Identifier */:
-                    return substituteExpressionIdentifier(node);
-                case 187 /* BinaryExpression */:
-                    return substituteBinaryExpression(node);
-                case 185 /* PrefixUnaryExpression */:
-                case 186 /* PostfixUnaryExpression */:
-                    return substituteUnaryExpression(node);
+        function visitDestructuringAssignment(node) {
+            if (hasExportedReferenceInDestructuringTarget(node.left)) {
+                return ts.flattenDestructuringAssignment(node, destructuringAndImportCallVisitor, context, 0 /* All */, 
+                /*needsValue*/ true);
             }
-            return node;
+            return ts.visitEachChild(node, destructuringAndImportCallVisitor, context);
         }
         /**
-         * Substitution for identifiers exported at the top level of a module.
+         * Determines whether the target of a destructuring assigment refers to an exported symbol.
+         *
+         * @param node The destructuring target.
          */
-        function substituteExpressionIdentifier(node) {
-            var importDeclaration = resolver.getReferencedImportDeclaration(node);
-            if (importDeclaration) {
-                var importBinding = createImportBinding(importDeclaration);
-                if (importBinding) {
-                    return importBinding;
-                }
+        function hasExportedReferenceInDestructuringTarget(node) {
+            if (ts.isAssignmentExpression(node, /*excludeCompoundAssignment*/ true)) {
+                return hasExportedReferenceInDestructuringTarget(node.left);
             }
-            return node;
-        }
-        function substituteBinaryExpression(node) {
-            if (ts.isAssignmentOperator(node.operatorToken.kind)) {
-                return substituteAssignmentExpression(node);
+            else if (ts.isSpreadElement(node)) {
+                return hasExportedReferenceInDestructuringTarget(node.expression);
             }
-            return node;
-        }
-        function substituteAssignmentExpression(node) {
-            ts.setEmitFlags(node, 128 /* NoSubstitution */);
-            var left = node.left;
-            switch (left.kind) {
-                case 69 /* Identifier */:
-                    var exportDeclaration = resolver.getReferencedExportContainer(left);
-                    if (exportDeclaration) {
-                        return createExportExpression(left, node);
-                    }
-                    break;
-                case 171 /* ObjectLiteralExpression */:
-                case 170 /* ArrayLiteralExpression */:
-                    if (hasExportedReferenceInDestructuringPattern(left)) {
-                        return substituteDestructuring(node);
-                    }
-                    break;
+            else if (ts.isObjectLiteralExpression(node)) {
+                return ts.some(node.properties, hasExportedReferenceInDestructuringTarget);
             }
-            return node;
-        }
-        function isExportedBinding(name) {
-            var container = resolver.getReferencedExportContainer(name);
-            return container && container.kind === 256 /* SourceFile */;
-        }
-        function hasExportedReferenceInDestructuringPattern(node) {
-            switch (node.kind) {
-                case 69 /* Identifier */:
-                    return isExportedBinding(node);
-                case 171 /* ObjectLiteralExpression */:
-                    for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
-                        var property = _a[_i];
-                        if (hasExportedReferenceInObjectDestructuringElement(property)) {
-                            return true;
-                        }
-                    }
-                    break;
-                case 170 /* ArrayLiteralExpression */:
-                    for (var _b = 0, _c = node.elements; _b < _c.length; _b++) {
-                        var element = _c[_b];
-                        if (hasExportedReferenceInArrayDestructuringElement(element)) {
-                            return true;
-                        }
-                    }
-                    break;
+            else if (ts.isArrayLiteralExpression(node)) {
+                return ts.some(node.elements, hasExportedReferenceInDestructuringTarget);
             }
-            return false;
-        }
-        function hasExportedReferenceInObjectDestructuringElement(node) {
-            if (ts.isShorthandPropertyAssignment(node)) {
-                return isExportedBinding(node.name);
+            else if (ts.isShorthandPropertyAssignment(node)) {
+                return hasExportedReferenceInDestructuringTarget(node.name);
             }
             else if (ts.isPropertyAssignment(node)) {
-                return hasExportedReferenceInDestructuringElement(node.initializer);
-            }
-            else {
-                return false;
-            }
-        }
-        function hasExportedReferenceInArrayDestructuringElement(node) {
-            if (ts.isSpreadElementExpression(node)) {
-                var expression = node.expression;
-                return ts.isIdentifier(expression) && isExportedBinding(expression);
-            }
-            else {
-                return hasExportedReferenceInDestructuringElement(node);
-            }
-        }
-        function hasExportedReferenceInDestructuringElement(node) {
-            if (ts.isBinaryExpression(node)) {
-                var left = node.left;
-                return node.operatorToken.kind === 56 /* EqualsToken */
-                    && isDestructuringPattern(left)
-                    && hasExportedReferenceInDestructuringPattern(left);
+                return hasExportedReferenceInDestructuringTarget(node.initializer);
             }
             else if (ts.isIdentifier(node)) {
-                return isExportedBinding(node);
-            }
-            else if (ts.isSpreadElementExpression(node)) {
-                var expression = node.expression;
-                return ts.isIdentifier(expression) && isExportedBinding(expression);
-            }
-            else if (isDestructuringPattern(node)) {
-                return hasExportedReferenceInDestructuringPattern(node);
+                var container = resolver.getReferencedExportContainer(node);
+                return container !== undefined && container.kind === 265 /* SourceFile */;
             }
             else {
                 return false;
             }
         }
-        function isDestructuringPattern(node) {
-            var kind = node.kind;
-            return kind === 69 /* Identifier */
-                || kind === 171 /* ObjectLiteralExpression */
-                || kind === 170 /* ArrayLiteralExpression */;
-        }
-        function substituteDestructuring(node) {
-            return ts.flattenDestructuringAssignment(context, node, /*needsValue*/ true, hoistVariableDeclaration);
-        }
-        function substituteUnaryExpression(node) {
-            var operand = node.operand;
-            var operator = node.operator;
-            var substitute = ts.isIdentifier(operand) &&
-                (node.kind === 186 /* PostfixUnaryExpression */ ||
-                    (node.kind === 185 /* PrefixUnaryExpression */ && (operator === 41 /* PlusPlusToken */ || operator === 42 /* MinusMinusToken */)));
-            if (substitute) {
-                var exportDeclaration = resolver.getReferencedExportContainer(operand);
-                if (exportDeclaration) {
-                    var expr = ts.createPrefix(node.operator, operand, node);
-                    ts.setEmitFlags(expr, 128 /* NoSubstitution */);
-                    var call = createExportExpression(operand, expr);
-                    if (node.kind === 185 /* PrefixUnaryExpression */) {
-                        return call;
-                    }
-                    else {
-                        // export function returns the value that was passes as the second argument
-                        // however for postfix unary expressions result value should be the value before modification.
-                        // emit 'x++' as '(export('x', ++x) - 1)' and 'x--' as '(export('x', --x) + 1)'
-                        return operator === 41 /* PlusPlusToken */
-                            ? ts.createSubtract(call, ts.createLiteral(1))
-                            : ts.createAdd(call, ts.createLiteral(1));
-                    }
-                }
+        //
+        // Modifier Visitors
+        //
+        /**
+         * Visit nodes to elide module-specific modifiers.
+         *
+         * @param node The node to visit.
+         */
+        function modifierVisitor(node) {
+            switch (node.kind) {
+                case 84 /* ExportKeyword */:
+                case 79 /* DefaultKeyword */:
+                    return undefined;
             }
             return node;
         }
+        //
+        // Emit Notification
+        //
         /**
-         * Gets a name to use for a DeclarationStatement.
-         * @param node The declaration statement.
+         * Hook for node emit notifications.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to emit.
+         * @param emitCallback A callback used to emit the node in the printer.
          */
-        function getDeclarationName(node) {
-            return node.name ? ts.getSynthesizedClone(node.name) : ts.getGeneratedNameForNode(node);
-        }
-        function addExportStarFunction(statements, localNames) {
-            var exportStarFunction = ts.createUniqueName("exportStar");
-            var m = ts.createIdentifier("m");
-            var n = ts.createIdentifier("n");
-            var exports = ts.createIdentifier("exports");
-            var condition = ts.createStrictInequality(n, ts.createLiteral("default"));
-            if (localNames) {
-                condition = ts.createLogicalAnd(condition, ts.createLogicalNot(ts.createHasOwnProperty(localNames, n)));
+        function onEmitNode(hint, node, emitCallback) {
+            if (node.kind === 265 /* SourceFile */) {
+                var id = ts.getOriginalNodeId(node);
+                currentSourceFile = node;
+                moduleInfo = moduleInfoMap[id];
+                exportFunction = exportFunctionsMap[id];
+                noSubstitution = noSubstitutionMap[id];
+                if (noSubstitution) {
+                    delete noSubstitutionMap[id];
+                }
+                previousOnEmitNode(hint, node, emitCallback);
+                currentSourceFile = undefined;
+                moduleInfo = undefined;
+                exportFunction = undefined;
+                noSubstitution = undefined;
+            }
+            else {
+                previousOnEmitNode(hint, node, emitCallback);
             }
-            statements.push(ts.createFunctionDeclaration(
-            /*decorators*/ undefined, 
-            /*modifiers*/ undefined, 
-            /*asteriskToken*/ undefined, exportStarFunction, 
-            /*typeParameters*/ undefined, [ts.createParameter(m)], 
-            /*type*/ undefined, ts.createBlock([
-                ts.createVariableStatement(
-                /*modifiers*/ undefined, ts.createVariableDeclarationList([
-                    ts.createVariableDeclaration(exports, 
-                    /*type*/ undefined, ts.createObjectLiteral([]))
-                ])),
-                ts.createForIn(ts.createVariableDeclarationList([
-                    ts.createVariableDeclaration(n, /*type*/ undefined)
-                ]), m, ts.createBlock([
-                    ts.setEmitFlags(ts.createIf(condition, ts.createStatement(ts.createAssignment(ts.createElementAccess(exports, n), ts.createElementAccess(m, n)))), 32 /* SingleLine */)
-                ])),
-                ts.createStatement(ts.createCall(exportFunctionForFile, 
-                /*typeArguments*/ undefined, [exports]))
-            ], 
-            /*location*/ undefined, 
-            /*multiline*/ true)));
-            return exportStarFunction;
         }
+        //
+        // Substitutions
+        //
         /**
-         * Creates a call to the current file's export function to export a value.
-         * @param name The bound name of the export.
-         * @param value The exported value.
+         * Hooks node substitutions.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to substitute.
          */
-        function createExportExpression(name, value) {
-            var exportName = ts.isIdentifier(name) ? ts.createLiteral(name.text) : name;
-            return ts.createCall(exportFunctionForFile, /*typeArguments*/ undefined, [exportName, value]);
+        function onSubstituteNode(hint, node) {
+            node = previousOnSubstituteNode(hint, node);
+            if (isSubstitutionPrevented(node)) {
+                return node;
+            }
+            if (hint === 1 /* Expression */) {
+                return substituteExpression(node);
+            }
+            return node;
         }
         /**
-         * Creates a call to the current file's export function to export a value.
-         * @param name The bound name of the export.
-         * @param value The exported value.
+         * Substitute the expression, if necessary.
+         *
+         * @param node The node to substitute.
          */
-        function createExportStatement(name, value) {
-            return ts.createStatement(createExportExpression(name, value));
+        function substituteExpression(node) {
+            switch (node.kind) {
+                case 71 /* Identifier */:
+                    return substituteExpressionIdentifier(node);
+                case 194 /* BinaryExpression */:
+                    return substituteBinaryExpression(node);
+                case 192 /* PrefixUnaryExpression */:
+                case 193 /* PostfixUnaryExpression */:
+                    return substituteUnaryExpression(node);
+            }
+            return node;
         }
         /**
-         * Creates a call to the current file's export function to export a declaration.
-         * @param node The declaration to export.
+         * Substitution for an Identifier expression that may contain an imported or exported symbol.
+         *
+         * @param node The node to substitute.
          */
-        function createDeclarationExport(node) {
-            var declarationName = getDeclarationName(node);
-            var exportName = ts.hasModifier(node, 512 /* Default */) ? ts.createLiteral("default") : declarationName;
-            return createExportStatement(exportName, declarationName);
-        }
-        function createImportBinding(importDeclaration) {
-            var importAlias;
-            var name;
-            if (ts.isImportClause(importDeclaration)) {
-                importAlias = ts.getGeneratedNameForNode(importDeclaration.parent);
-                name = ts.createIdentifier("default");
-            }
-            else if (ts.isImportSpecifier(importDeclaration)) {
-                importAlias = ts.getGeneratedNameForNode(importDeclaration.parent.parent.parent);
-                name = importDeclaration.propertyName || importDeclaration.name;
-            }
-            else {
-                return undefined;
-            }
-            if (name.originalKeywordKind && languageVersion === 0 /* ES3 */) {
-                return ts.createElementAccess(importAlias, ts.createLiteral(name.text));
-            }
-            else {
-                return ts.createPropertyAccess(importAlias, ts.getSynthesizedClone(name));
-            }
-        }
-        function collectDependencyGroups(externalImports) {
-            var groupIndices = ts.createMap();
-            var dependencyGroups = [];
-            for (var i = 0; i < externalImports.length; i++) {
-                var externalImport = externalImports[i];
-                var externalModuleName = ts.getExternalModuleNameLiteral(externalImport, currentSourceFile, host, resolver, compilerOptions);
-                var text = externalModuleName.text;
-                if (ts.hasProperty(groupIndices, text)) {
-                    // deduplicate/group entries in dependency list by the dependency name
-                    var groupIndex = groupIndices[text];
-                    dependencyGroups[groupIndex].externalImports.push(externalImport);
-                    continue;
+        function substituteExpressionIdentifier(node) {
+            if (ts.getEmitFlags(node) & 4096 /* HelperName */) {
+                var externalHelpersModuleName = ts.getExternalHelpersModuleName(currentSourceFile);
+                if (externalHelpersModuleName) {
+                    return ts.createPropertyAccess(externalHelpersModuleName, node);
                 }
-                else {
-                    groupIndices[text] = dependencyGroups.length;
-                    dependencyGroups.push({
-                        name: externalModuleName,
-                        externalImports: [externalImport]
-                    });
+                return node;
+            }
+            // When we see an identifier in an expression position that
+            // points to an imported symbol, we should substitute a qualified
+            // reference to the imported symbol if one is needed.
+            //
+            // - We do not substitute generated identifiers for any reason.
+            // - We do not substitute identifiers tagged with the LocalName flag.
+            if (!ts.isGeneratedIdentifier(node) && !ts.isLocalName(node)) {
+                var importDeclaration = resolver.getReferencedImportDeclaration(node);
+                if (importDeclaration) {
+                    if (ts.isImportClause(importDeclaration)) {
+                        return ts.setTextRange(ts.createPropertyAccess(ts.getGeneratedNameForNode(importDeclaration.parent), ts.createIdentifier("default")), 
+                        /*location*/ node);
+                    }
+                    else if (ts.isImportSpecifier(importDeclaration)) {
+                        return ts.setTextRange(ts.createPropertyAccess(ts.getGeneratedNameForNode(importDeclaration.parent.parent.parent), ts.getSynthesizedClone(importDeclaration.propertyName || importDeclaration.name)), 
+                        /*location*/ node);
+                    }
                 }
             }
-            return dependencyGroups;
-        }
-        function getNameOfDependencyGroup(dependencyGroup) {
-            return dependencyGroup.name;
+            return node;
         }
-        function recordExportName(name) {
-            if (!exportedLocalNames) {
-                exportedLocalNames = [];
+        /**
+         * Substitution for a BinaryExpression that may contain an imported or exported symbol.
+         *
+         * @param node The node to substitute.
+         */
+        function substituteBinaryExpression(node) {
+            // When we see an assignment expression whose left-hand side is an exported symbol,
+            // we should ensure all exports of that symbol are updated with the correct value.
+            //
+            // - We do not substitute generated identifiers for any reason.
+            // - We do not substitute identifiers tagged with the LocalName flag.
+            // - We do not substitute identifiers that were originally the name of an enum or
+            //   namespace due to how they are transformed in TypeScript.
+            // - We only substitute identifiers that are exported at the top level.
+            if (ts.isAssignmentOperator(node.operatorToken.kind)
+                && ts.isIdentifier(node.left)
+                && !ts.isGeneratedIdentifier(node.left)
+                && !ts.isLocalName(node.left)
+                && !ts.isDeclarationNameOfEnumOrNamespace(node.left)) {
+                var exportedNames = getExports(node.left);
+                if (exportedNames) {
+                    // For each additional export of the declaration, apply an export assignment.
+                    var expression = node;
+                    for (var _i = 0, exportedNames_3 = exportedNames; _i < exportedNames_3.length; _i++) {
+                        var exportName = exportedNames_3[_i];
+                        expression = createExportExpression(exportName, preventSubstitution(expression));
+                    }
+                    return expression;
+                }
             }
-            exportedLocalNames.push(name);
+            return node;
         }
-        function recordExportedFunctionDeclaration(node) {
-            if (!exportedFunctionDeclarations) {
-                exportedFunctionDeclarations = [];
+        /**
+         * Substitution for a UnaryExpression that may contain an imported or exported symbol.
+         *
+         * @param node The node to substitute.
+         */
+        function substituteUnaryExpression(node) {
+            // When we see a prefix or postfix increment expression whose operand is an exported
+            // symbol, we should ensure all exports of that symbol are updated with the correct
+            // value.
+            //
+            // - We do not substitute generated identifiers for any reason.
+            // - We do not substitute identifiers tagged with the LocalName flag.
+            // - We do not substitute identifiers that were originally the name of an enum or
+            //   namespace due to how they are transformed in TypeScript.
+            // - We only substitute identifiers that are exported at the top level.
+            if ((node.operator === 43 /* PlusPlusToken */ || node.operator === 44 /* MinusMinusToken */)
+                && ts.isIdentifier(node.operand)
+                && !ts.isGeneratedIdentifier(node.operand)
+                && !ts.isLocalName(node.operand)
+                && !ts.isDeclarationNameOfEnumOrNamespace(node.operand)) {
+                var exportedNames = getExports(node.operand);
+                if (exportedNames) {
+                    var expression = node.kind === 193 /* PostfixUnaryExpression */
+                        ? ts.setTextRange(ts.createPrefix(node.operator, node.operand), node)
+                        : node;
+                    for (var _i = 0, exportedNames_4 = exportedNames; _i < exportedNames_4.length; _i++) {
+                        var exportName = exportedNames_4[_i];
+                        expression = createExportExpression(exportName, preventSubstitution(expression));
+                    }
+                    if (node.kind === 193 /* PostfixUnaryExpression */) {
+                        expression = node.operator === 43 /* PlusPlusToken */
+                            ? ts.createSubtract(preventSubstitution(expression), ts.createLiteral(1))
+                            : ts.createAdd(preventSubstitution(expression), ts.createLiteral(1));
+                    }
+                    return expression;
+                }
             }
-            exportedFunctionDeclarations.push(createDeclarationExport(node));
+            return node;
         }
-        function hoistBindingElement(node, isExported) {
-            if (ts.isOmittedExpression(node)) {
-                return;
-            }
-            var name = node.name;
-            if (ts.isIdentifier(name)) {
-                hoistVariableDeclaration(ts.getSynthesizedClone(name));
-                if (isExported) {
-                    recordExportName(name);
+        /**
+         * Gets the exports of a name.
+         *
+         * @param name The name.
+         */
+        function getExports(name) {
+            var exportedNames;
+            if (!ts.isGeneratedIdentifier(name)) {
+                var valueDeclaration = resolver.getReferencedImportDeclaration(name)
+                    || resolver.getReferencedValueDeclaration(name);
+                if (valueDeclaration) {
+                    var exportContainer = resolver.getReferencedExportContainer(name, /*prefixLocals*/ false);
+                    if (exportContainer && exportContainer.kind === 265 /* SourceFile */) {
+                        exportedNames = ts.append(exportedNames, ts.getDeclarationName(valueDeclaration));
+                    }
+                    exportedNames = ts.addRange(exportedNames, moduleInfo && moduleInfo.exportedBindings[ts.getOriginalNodeId(valueDeclaration)]);
                 }
             }
-            else if (ts.isBindingPattern(name)) {
-                ts.forEach(name.elements, isExported ? hoistExportedBindingElement : hoistNonExportedBindingElement);
-            }
-        }
-        function hoistExportedBindingElement(node) {
-            hoistBindingElement(node, /*isExported*/ true);
+            return exportedNames;
         }
-        function hoistNonExportedBindingElement(node) {
-            hoistBindingElement(node, /*isExported*/ false);
+        /**
+         * Prevent substitution of a node for this transformer.
+         *
+         * @param node The node which should not be substituted.
+         */
+        function preventSubstitution(node) {
+            if (noSubstitution === undefined)
+                noSubstitution = [];
+            noSubstitution[ts.getNodeId(node)] = true;
+            return node;
         }
-        function updateSourceFile(node, statements, nodeEmitFlags) {
-            var updated = ts.getMutableClone(node);
-            updated.statements = ts.createNodeArray(statements, node.statements);
-            ts.setEmitFlags(updated, nodeEmitFlags);
-            return updated;
+        /**
+         * Determines whether a node should not be substituted.
+         *
+         * @param node The node to test.
+         */
+        function isSubstitutionPrevented(node) {
+            return noSubstitution && node.id && noSubstitution[node.id];
         }
     }
     ts.transformSystemModule = transformSystemModule;
@@ -55524,167 +67016,168 @@ var ts;
 /*@internal*/
 var ts;
 (function (ts) {
-    function transformES6Module(context) {
+    function transformES2015Module(context) {
         var compilerOptions = context.getCompilerOptions();
-        var resolver = context.getEmitResolver();
+        var previousOnEmitNode = context.onEmitNode;
+        var previousOnSubstituteNode = context.onSubstituteNode;
+        context.onEmitNode = onEmitNode;
+        context.onSubstituteNode = onSubstituteNode;
+        context.enableEmitNotification(265 /* SourceFile */);
+        context.enableSubstitution(71 /* Identifier */);
         var currentSourceFile;
         return transformSourceFile;
         function transformSourceFile(node) {
-            if (ts.isDeclarationFile(node)) {
+            if (node.isDeclarationFile) {
                 return node;
             }
             if (ts.isExternalModule(node) || compilerOptions.isolatedModules) {
-                currentSourceFile = node;
-                return ts.visitEachChild(node, visitor, context);
+                var externalHelpersModuleName = ts.getOrCreateExternalHelpersModuleNameIfNeeded(node, compilerOptions);
+                if (externalHelpersModuleName) {
+                    var statements = [];
+                    var statementOffset = ts.addPrologue(statements, node.statements);
+                    ts.append(statements, ts.createImportDeclaration(
+                    /*decorators*/ undefined, 
+                    /*modifiers*/ undefined, ts.createImportClause(/*name*/ undefined, ts.createNamespaceImport(externalHelpersModuleName)), ts.createLiteral(ts.externalHelpersModuleNameText)));
+                    ts.addRange(statements, ts.visitNodes(node.statements, visitor, ts.isStatement, statementOffset));
+                    return ts.updateSourceFileNode(node, ts.setTextRange(ts.createNodeArray(statements), node.statements));
+                }
+                else {
+                    return ts.visitEachChild(node, visitor, context);
+                }
             }
             return node;
         }
         function visitor(node) {
             switch (node.kind) {
-                case 230 /* ImportDeclaration */:
-                    return visitImportDeclaration(node);
-                case 229 /* ImportEqualsDeclaration */:
-                    return visitImportEqualsDeclaration(node);
-                case 231 /* ImportClause */:
-                    return visitImportClause(node);
-                case 233 /* NamedImports */:
-                case 232 /* NamespaceImport */:
-                    return visitNamedBindings(node);
-                case 234 /* ImportSpecifier */:
-                    return visitImportSpecifier(node);
-                case 235 /* ExportAssignment */:
+                case 237 /* ImportEqualsDeclaration */:
+                    // Elide `import=` as it is not legal with --module ES6
+                    return undefined;
+                case 243 /* ExportAssignment */:
                     return visitExportAssignment(node);
-                case 236 /* ExportDeclaration */:
-                    return visitExportDeclaration(node);
-                case 237 /* NamedExports */:
-                    return visitNamedExports(node);
-                case 238 /* ExportSpecifier */:
-                    return visitExportSpecifier(node);
             }
             return node;
         }
         function visitExportAssignment(node) {
-            if (node.isExportEquals) {
-                return undefined; // do not emit export equals for ES6
-            }
-            var original = ts.getOriginalNode(node);
-            return ts.nodeIsSynthesized(original) || resolver.isValueAliasDeclaration(original) ? node : undefined;
+            // Elide `export=` as it is not legal with --module ES6
+            return node.isExportEquals ? undefined : node;
         }
-        function visitExportDeclaration(node) {
-            if (!node.exportClause) {
-                return resolver.moduleExportsSomeValue(node.moduleSpecifier) ? node : undefined;
-            }
-            if (!resolver.isValueAliasDeclaration(node)) {
-                return undefined;
-            }
-            var newExportClause = ts.visitNode(node.exportClause, visitor, ts.isNamedExports, /*optional*/ true);
-            if (node.exportClause === newExportClause) {
-                return node;
+        //
+        // Emit Notification
+        //
+        /**
+         * Hook for node emit.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to emit.
+         * @param emit A callback used to emit the node in the printer.
+         */
+        function onEmitNode(hint, node, emitCallback) {
+            if (ts.isSourceFile(node)) {
+                currentSourceFile = node;
+                previousOnEmitNode(hint, node, emitCallback);
+                currentSourceFile = undefined;
             }
-            return newExportClause
-                ? ts.createExportDeclaration(
-                /*decorators*/ undefined, 
-                /*modifiers*/ undefined, newExportClause, node.moduleSpecifier)
-                : undefined;
-        }
-        function visitNamedExports(node) {
-            var newExports = ts.visitNodes(node.elements, visitor, ts.isExportSpecifier);
-            if (node.elements === newExports) {
-                return node;
+            else {
+                previousOnEmitNode(hint, node, emitCallback);
             }
-            return newExports.length ? ts.createNamedExports(newExports) : undefined;
-        }
-        function visitExportSpecifier(node) {
-            return resolver.isValueAliasDeclaration(node) ? node : undefined;
-        }
-        function visitImportEqualsDeclaration(node) {
-            return !ts.isExternalModuleImportEqualsDeclaration(node) || resolver.isReferencedAliasDeclaration(node) ? node : undefined;
         }
-        function visitImportDeclaration(node) {
-            if (node.importClause) {
-                var newImportClause = ts.visitNode(node.importClause, visitor, ts.isImportClause);
-                if (!newImportClause.name && !newImportClause.namedBindings) {
-                    return undefined;
-                }
-                else if (newImportClause !== node.importClause) {
-                    return ts.createImportDeclaration(
-                    /*decorators*/ undefined, 
-                    /*modifiers*/ undefined, newImportClause, node.moduleSpecifier);
-                }
+        //
+        // Substitutions
+        //
+        /**
+         * Hooks node substitutions.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to substitute.
+         */
+        function onSubstituteNode(hint, node) {
+            node = previousOnSubstituteNode(hint, node);
+            if (ts.isIdentifier(node) && hint === 1 /* Expression */) {
+                return substituteExpressionIdentifier(node);
             }
             return node;
         }
-        function visitImportClause(node) {
-            var newDefaultImport = node.name;
-            if (!resolver.isReferencedAliasDeclaration(node)) {
-                newDefaultImport = undefined;
-            }
-            var newNamedBindings = ts.visitNode(node.namedBindings, visitor, ts.isNamedImportBindings, /*optional*/ true);
-            return newDefaultImport !== node.name || newNamedBindings !== node.namedBindings
-                ? ts.createImportClause(newDefaultImport, newNamedBindings)
-                : node;
-        }
-        function visitNamedBindings(node) {
-            if (node.kind === 232 /* NamespaceImport */) {
-                return resolver.isReferencedAliasDeclaration(node) ? node : undefined;
-            }
-            else {
-                var newNamedImportElements = ts.visitNodes(node.elements, visitor, ts.isImportSpecifier);
-                if (!newNamedImportElements || newNamedImportElements.length == 0) {
-                    return undefined;
-                }
-                if (newNamedImportElements === node.elements) {
-                    return node;
+        function substituteExpressionIdentifier(node) {
+            if (ts.getEmitFlags(node) & 4096 /* HelperName */) {
+                var externalHelpersModuleName = ts.getExternalHelpersModuleName(currentSourceFile);
+                if (externalHelpersModuleName) {
+                    return ts.createPropertyAccess(externalHelpersModuleName, node);
                 }
-                return ts.createNamedImports(newNamedImportElements);
             }
-        }
-        function visitImportSpecifier(node) {
-            return resolver.isReferencedAliasDeclaration(node) ? node : undefined;
+            return node;
         }
     }
-    ts.transformES6Module = transformES6Module;
+    ts.transformES2015Module = transformES2015Module;
 })(ts || (ts = {}));
 /// <reference path="visitor.ts" />
+/// <reference path="transformers/utilities.ts" />
 /// <reference path="transformers/ts.ts" />
 /// <reference path="transformers/jsx.ts" />
-/// <reference path="transformers/es7.ts" />
-/// <reference path="transformers/es6.ts" />
+/// <reference path="transformers/esnext.ts" />
+/// <reference path="transformers/es2017.ts" />
+/// <reference path="transformers/es2016.ts" />
+/// <reference path="transformers/es2015.ts" />
 /// <reference path="transformers/generators.ts" />
+/// <reference path="transformers/es5.ts" />
 /// <reference path="transformers/module/module.ts" />
 /// <reference path="transformers/module/system.ts" />
-/// <reference path="transformers/module/es6.ts" />
+/// <reference path="transformers/module/es2015.ts" />
 /* @internal */
 var ts;
 (function (ts) {
-    var moduleTransformerMap = ts.createMap((_a = {},
-        _a[ts.ModuleKind.ES6] = ts.transformES6Module,
-        _a[ts.ModuleKind.System] = ts.transformSystemModule,
-        _a[ts.ModuleKind.AMD] = ts.transformModule,
-        _a[ts.ModuleKind.CommonJS] = ts.transformModule,
-        _a[ts.ModuleKind.UMD] = ts.transformModule,
-        _a[ts.ModuleKind.None] = ts.transformModule,
-        _a));
+    function getModuleTransformer(moduleKind) {
+        switch (moduleKind) {
+            case ts.ModuleKind.ESNext:
+            case ts.ModuleKind.ES2015:
+                return ts.transformES2015Module;
+            case ts.ModuleKind.System:
+                return ts.transformSystemModule;
+            default:
+                return ts.transformModule;
+        }
+    }
+    var TransformationState;
+    (function (TransformationState) {
+        TransformationState[TransformationState["Uninitialized"] = 0] = "Uninitialized";
+        TransformationState[TransformationState["Initialized"] = 1] = "Initialized";
+        TransformationState[TransformationState["Completed"] = 2] = "Completed";
+        TransformationState[TransformationState["Disposed"] = 3] = "Disposed";
+    })(TransformationState || (TransformationState = {}));
     var SyntaxKindFeatureFlags;
     (function (SyntaxKindFeatureFlags) {
         SyntaxKindFeatureFlags[SyntaxKindFeatureFlags["Substitution"] = 1] = "Substitution";
         SyntaxKindFeatureFlags[SyntaxKindFeatureFlags["EmitNotifications"] = 2] = "EmitNotifications";
     })(SyntaxKindFeatureFlags || (SyntaxKindFeatureFlags = {}));
-    function getTransformers(compilerOptions) {
+    function getTransformers(compilerOptions, customTransformers) {
         var jsx = compilerOptions.jsx;
         var languageVersion = ts.getEmitScriptTarget(compilerOptions);
         var moduleKind = ts.getEmitModuleKind(compilerOptions);
         var transformers = [];
+        ts.addRange(transformers, customTransformers && customTransformers.before);
         transformers.push(ts.transformTypeScript);
-        transformers.push(moduleTransformerMap[moduleKind] || moduleTransformerMap[ts.ModuleKind.None]);
         if (jsx === 2 /* React */) {
             transformers.push(ts.transformJsx);
         }
-        transformers.push(ts.transformES7);
-        if (languageVersion < 2 /* ES6 */) {
-            transformers.push(ts.transformES6);
+        if (languageVersion < 5 /* ESNext */) {
+            transformers.push(ts.transformESNext);
+        }
+        if (languageVersion < 4 /* ES2017 */) {
+            transformers.push(ts.transformES2017);
+        }
+        if (languageVersion < 3 /* ES2016 */) {
+            transformers.push(ts.transformES2016);
+        }
+        if (languageVersion < 2 /* ES2015 */) {
+            transformers.push(ts.transformES2015);
             transformers.push(ts.transformGenerators);
         }
+        transformers.push(getModuleTransformer(moduleKind));
+        // The ES5 transformer is last so that it can substitute expressions like `exports.default`
+        // for ES3.
+        if (languageVersion < 1 /* ES5 */) {
+            transformers.push(ts.transformES5);
+        }
+        ts.addRange(transformers, customTransformers && customTransformers.after);
         return transformers;
     }
     ts.getTransformers = getTransformers;
@@ -55692,61 +67185,85 @@ var ts;
      * Transforms an array of SourceFiles by passing them through each transformer.
      *
      * @param resolver The emit resolver provided by the checker.
-     * @param host The emit host.
-     * @param sourceFiles An array of source files
-     * @param transforms An array of Transformers.
+     * @param host The emit host object used to interact with the file system.
+     * @param options Compiler options to surface in the `TransformationContext`.
+     * @param nodes An array of nodes to transform.
+     * @param transforms An array of `TransformerFactory` callbacks.
+     * @param allowDtsFiles A value indicating whether to allow the transformation of .d.ts files.
      */
-    function transformFiles(resolver, host, sourceFiles, transformers) {
+    function transformNodes(resolver, host, options, nodes, transformers, allowDtsFiles) {
+        var enabledSyntaxKindFeatures = new Array(301 /* Count */);
+        var lexicalEnvironmentVariableDeclarations;
+        var lexicalEnvironmentFunctionDeclarations;
         var lexicalEnvironmentVariableDeclarationsStack = [];
         var lexicalEnvironmentFunctionDeclarationsStack = [];
-        var enabledSyntaxKindFeatures = new Array(289 /* Count */);
         var lexicalEnvironmentStackOffset = 0;
-        var hoistedVariableDeclarations;
-        var hoistedFunctionDeclarations;
-        var lexicalEnvironmentDisabled;
+        var lexicalEnvironmentSuspended = false;
+        var emitHelpers;
+        var onSubstituteNode = function (_, node) { return node; };
+        var onEmitNode = function (hint, node, callback) { return callback(hint, node); };
+        var state = 0 /* Uninitialized */;
         // The transformation context is provided to each transformer as part of transformer
         // initialization.
         var context = {
-            getCompilerOptions: function () { return host.getCompilerOptions(); },
+            getCompilerOptions: function () { return options; },
             getEmitResolver: function () { return resolver; },
             getEmitHost: function () { return host; },
-            hoistVariableDeclaration: hoistVariableDeclaration,
-            hoistFunctionDeclaration: hoistFunctionDeclaration,
             startLexicalEnvironment: startLexicalEnvironment,
+            suspendLexicalEnvironment: suspendLexicalEnvironment,
+            resumeLexicalEnvironment: resumeLexicalEnvironment,
             endLexicalEnvironment: endLexicalEnvironment,
-            onSubstituteNode: function (emitContext, node) { return node; },
+            hoistVariableDeclaration: hoistVariableDeclaration,
+            hoistFunctionDeclaration: hoistFunctionDeclaration,
+            requestEmitHelper: requestEmitHelper,
+            readEmitHelpers: readEmitHelpers,
             enableSubstitution: enableSubstitution,
-            isSubstitutionEnabled: isSubstitutionEnabled,
-            onEmitNode: function (node, emitContext, emitCallback) { return emitCallback(node, emitContext); },
             enableEmitNotification: enableEmitNotification,
-            isEmitNotificationEnabled: isEmitNotificationEnabled
+            isSubstitutionEnabled: isSubstitutionEnabled,
+            isEmitNotificationEnabled: isEmitNotificationEnabled,
+            get onSubstituteNode() { return onSubstituteNode; },
+            set onSubstituteNode(value) {
+                ts.Debug.assert(state < 1 /* Initialized */, "Cannot modify transformation hooks after initialization has completed.");
+                ts.Debug.assert(value !== undefined, "Value must not be 'undefined'");
+                onSubstituteNode = value;
+            },
+            get onEmitNode() { return onEmitNode; },
+            set onEmitNode(value) {
+                ts.Debug.assert(state < 1 /* Initialized */, "Cannot modify transformation hooks after initialization has completed.");
+                ts.Debug.assert(value !== undefined, "Value must not be 'undefined'");
+                onEmitNode = value;
+            }
         };
+        // Ensure the parse tree is clean before applying transformations
+        for (var _i = 0, nodes_6 = nodes; _i < nodes_6.length; _i++) {
+            var node = nodes_6[_i];
+            ts.disposeEmitNodes(ts.getSourceFileOfNode(ts.getParseTreeNode(node)));
+        }
+        ts.performance.mark("beforeTransform");
         // Chain together and initialize each transformer.
         var transformation = ts.chain.apply(void 0, transformers)(context);
-        // Transform each source file.
-        var transformed = ts.map(sourceFiles, transformSourceFile);
-        // Disable modification of the lexical environment.
-        lexicalEnvironmentDisabled = true;
+        // prevent modification of transformation hooks.
+        state = 1 /* Initialized */;
+        // Transform each node.
+        var transformed = ts.map(nodes, allowDtsFiles ? transformation : transformRoot);
+        // prevent modification of the lexical environment.
+        state = 2 /* Completed */;
+        ts.performance.mark("afterTransform");
+        ts.performance.measure("transformTime", "beforeTransform", "afterTransform");
         return {
             transformed: transformed,
-            emitNodeWithSubstitution: emitNodeWithSubstitution,
-            emitNodeWithNotification: emitNodeWithNotification
+            substituteNode: substituteNode,
+            emitNodeWithNotification: emitNodeWithNotification,
+            dispose: dispose
         };
-        /**
-         * Transforms a source file.
-         *
-         * @param sourceFile The source file to transform.
-         */
-        function transformSourceFile(sourceFile) {
-            if (ts.isDeclarationFile(sourceFile)) {
-                return sourceFile;
-            }
-            return transformation(sourceFile);
+        function transformRoot(node) {
+            return node && (!ts.isSourceFile(node) || !node.isDeclarationFile) ? transformation(node) : node;
         }
         /**
          * Enables expression substitutions in the pretty printer for the provided SyntaxKind.
          */
         function enableSubstitution(kind) {
+            ts.Debug.assert(state < 2 /* Completed */, "Cannot modify the transformation context after transformation has completed.");
             enabledSyntaxKindFeatures[kind] |= 1 /* Substitution */;
         }
         /**
@@ -55754,31 +67271,24 @@ var ts;
          */
         function isSubstitutionEnabled(node) {
             return (enabledSyntaxKindFeatures[node.kind] & 1 /* Substitution */) !== 0
-                && (ts.getEmitFlags(node) & 128 /* NoSubstitution */) === 0;
+                && (ts.getEmitFlags(node) & 4 /* NoSubstitution */) === 0;
         }
         /**
          * Emits a node with possible substitution.
          *
-         * @param emitContext The current emit context.
+         * @param hint A hint as to the intended usage of the node.
          * @param node The node to emit.
          * @param emitCallback The callback used to emit the node or its substitute.
          */
-        function emitNodeWithSubstitution(emitContext, node, emitCallback) {
-            if (node) {
-                if (isSubstitutionEnabled(node)) {
-                    var substitute = context.onSubstituteNode(emitContext, node);
-                    if (substitute && substitute !== node) {
-                        emitCallback(emitContext, substitute);
-                        return;
-                    }
-                }
-                emitCallback(emitContext, node);
-            }
+        function substituteNode(hint, node) {
+            ts.Debug.assert(state < 3 /* Disposed */, "Cannot substitute a node after the result is disposed.");
+            return node && isSubstitutionEnabled(node) && onSubstituteNode(hint, node) || node;
         }
         /**
          * Enables before/after emit notifications in the pretty printer for the provided SyntaxKind.
          */
         function enableEmitNotification(kind) {
+            ts.Debug.assert(state < 2 /* Completed */, "Cannot modify the transformation context after transformation has completed.");
             enabledSyntaxKindFeatures[kind] |= 2 /* EmitNotifications */;
         }
         /**
@@ -55787,22 +67297,23 @@ var ts;
          */
         function isEmitNotificationEnabled(node) {
             return (enabledSyntaxKindFeatures[node.kind] & 2 /* EmitNotifications */) !== 0
-                || (ts.getEmitFlags(node) & 64 /* AdviseOnEmitNode */) !== 0;
+                || (ts.getEmitFlags(node) & 2 /* AdviseOnEmitNode */) !== 0;
         }
         /**
          * Emits a node with possible emit notification.
          *
-         * @param emitContext The current emit context.
+         * @param hint A hint as to the intended usage of the node.
          * @param node The node to emit.
          * @param emitCallback The callback used to emit the node.
          */
-        function emitNodeWithNotification(emitContext, node, emitCallback) {
+        function emitNodeWithNotification(hint, node, emitCallback) {
+            ts.Debug.assert(state < 3 /* Disposed */, "Cannot invoke TransformationResult callbacks after the result is disposed.");
             if (node) {
                 if (isEmitNotificationEnabled(node)) {
-                    context.onEmitNode(emitContext, node, emitCallback);
+                    onEmitNode(hint, node, emitCallback);
                 }
                 else {
-                    emitCallback(emitContext, node);
+                    emitCallback(hint, node);
                 }
             }
         }
@@ -55810,25 +67321,27 @@ var ts;
          * Records a hoisted variable declaration for the provided name within a lexical environment.
          */
         function hoistVariableDeclaration(name) {
-            ts.Debug.assert(!lexicalEnvironmentDisabled, "Cannot modify the lexical environment during the print phase.");
-            var decl = ts.createVariableDeclaration(name);
-            if (!hoistedVariableDeclarations) {
-                hoistedVariableDeclarations = [decl];
+            ts.Debug.assert(state > 0 /* Uninitialized */, "Cannot modify the lexical environment during initialization.");
+            ts.Debug.assert(state < 2 /* Completed */, "Cannot modify the lexical environment after transformation has completed.");
+            var decl = ts.setEmitFlags(ts.createVariableDeclaration(name), 64 /* NoNestedSourceMaps */);
+            if (!lexicalEnvironmentVariableDeclarations) {
+                lexicalEnvironmentVariableDeclarations = [decl];
             }
             else {
-                hoistedVariableDeclarations.push(decl);
+                lexicalEnvironmentVariableDeclarations.push(decl);
             }
         }
         /**
          * Records a hoisted function declaration within a lexical environment.
          */
         function hoistFunctionDeclaration(func) {
-            ts.Debug.assert(!lexicalEnvironmentDisabled, "Cannot modify the lexical environment during the print phase.");
-            if (!hoistedFunctionDeclarations) {
-                hoistedFunctionDeclarations = [func];
+            ts.Debug.assert(state > 0 /* Uninitialized */, "Cannot modify the lexical environment during initialization.");
+            ts.Debug.assert(state < 2 /* Completed */, "Cannot modify the lexical environment after transformation has completed.");
+            if (!lexicalEnvironmentFunctionDeclarations) {
+                lexicalEnvironmentFunctionDeclarations = [func];
             }
             else {
-                hoistedFunctionDeclarations.push(func);
+                lexicalEnvironmentFunctionDeclarations.push(func);
             }
         }
         /**
@@ -55836,31 +67349,49 @@ var ts;
          * are pushed onto a stack, and the related storage variables are reset.
          */
         function startLexicalEnvironment() {
-            ts.Debug.assert(!lexicalEnvironmentDisabled, "Cannot start a lexical environment during the print phase.");
+            ts.Debug.assert(state > 0 /* Uninitialized */, "Cannot modify the lexical environment during initialization.");
+            ts.Debug.assert(state < 2 /* Completed */, "Cannot modify the lexical environment after transformation has completed.");
+            ts.Debug.assert(!lexicalEnvironmentSuspended, "Lexical environment is suspended.");
             // Save the current lexical environment. Rather than resizing the array we adjust the
             // stack size variable. This allows us to reuse existing array slots we've
             // already allocated between transformations to avoid allocation and GC overhead during
             // transformation.
-            lexicalEnvironmentVariableDeclarationsStack[lexicalEnvironmentStackOffset] = hoistedVariableDeclarations;
-            lexicalEnvironmentFunctionDeclarationsStack[lexicalEnvironmentStackOffset] = hoistedFunctionDeclarations;
+            lexicalEnvironmentVariableDeclarationsStack[lexicalEnvironmentStackOffset] = lexicalEnvironmentVariableDeclarations;
+            lexicalEnvironmentFunctionDeclarationsStack[lexicalEnvironmentStackOffset] = lexicalEnvironmentFunctionDeclarations;
             lexicalEnvironmentStackOffset++;
-            hoistedVariableDeclarations = undefined;
-            hoistedFunctionDeclarations = undefined;
+            lexicalEnvironmentVariableDeclarations = undefined;
+            lexicalEnvironmentFunctionDeclarations = undefined;
+        }
+        /** Suspends the current lexical environment, usually after visiting a parameter list. */
+        function suspendLexicalEnvironment() {
+            ts.Debug.assert(state > 0 /* Uninitialized */, "Cannot modify the lexical environment during initialization.");
+            ts.Debug.assert(state < 2 /* Completed */, "Cannot modify the lexical environment after transformation has completed.");
+            ts.Debug.assert(!lexicalEnvironmentSuspended, "Lexical environment is already suspended.");
+            lexicalEnvironmentSuspended = true;
+        }
+        /** Resumes a suspended lexical environment, usually before visiting a function body. */
+        function resumeLexicalEnvironment() {
+            ts.Debug.assert(state > 0 /* Uninitialized */, "Cannot modify the lexical environment during initialization.");
+            ts.Debug.assert(state < 2 /* Completed */, "Cannot modify the lexical environment after transformation has completed.");
+            ts.Debug.assert(lexicalEnvironmentSuspended, "Lexical environment is not suspended.");
+            lexicalEnvironmentSuspended = false;
         }
         /**
          * Ends a lexical environment. The previous set of hoisted declarations are restored and
          * any hoisted declarations added in this environment are returned.
          */
         function endLexicalEnvironment() {
-            ts.Debug.assert(!lexicalEnvironmentDisabled, "Cannot end a lexical environment during the print phase.");
+            ts.Debug.assert(state > 0 /* Uninitialized */, "Cannot modify the lexical environment during initialization.");
+            ts.Debug.assert(state < 2 /* Completed */, "Cannot modify the lexical environment after transformation has completed.");
+            ts.Debug.assert(!lexicalEnvironmentSuspended, "Lexical environment is suspended.");
             var statements;
-            if (hoistedVariableDeclarations || hoistedFunctionDeclarations) {
-                if (hoistedFunctionDeclarations) {
-                    statements = hoistedFunctionDeclarations.slice();
+            if (lexicalEnvironmentVariableDeclarations || lexicalEnvironmentFunctionDeclarations) {
+                if (lexicalEnvironmentFunctionDeclarations) {
+                    statements = lexicalEnvironmentFunctionDeclarations.slice();
                 }
-                if (hoistedVariableDeclarations) {
+                if (lexicalEnvironmentVariableDeclarations) {
                     var statement = ts.createVariableStatement(
-                    /*modifiers*/ undefined, ts.createVariableDeclarationList(hoistedVariableDeclarations));
+                    /*modifiers*/ undefined, ts.createVariableDeclarationList(lexicalEnvironmentVariableDeclarations));
                     if (!statements) {
                         statements = [statement];
                     }
@@ -55871,13 +67402,48 @@ var ts;
             }
             // Restore the previous lexical environment.
             lexicalEnvironmentStackOffset--;
-            hoistedVariableDeclarations = lexicalEnvironmentVariableDeclarationsStack[lexicalEnvironmentStackOffset];
-            hoistedFunctionDeclarations = lexicalEnvironmentFunctionDeclarationsStack[lexicalEnvironmentStackOffset];
+            lexicalEnvironmentVariableDeclarations = lexicalEnvironmentVariableDeclarationsStack[lexicalEnvironmentStackOffset];
+            lexicalEnvironmentFunctionDeclarations = lexicalEnvironmentFunctionDeclarationsStack[lexicalEnvironmentStackOffset];
+            if (lexicalEnvironmentStackOffset === 0) {
+                lexicalEnvironmentVariableDeclarationsStack = [];
+                lexicalEnvironmentFunctionDeclarationsStack = [];
+            }
             return statements;
         }
-    }
-    ts.transformFiles = transformFiles;
-    var _a;
+        function requestEmitHelper(helper) {
+            ts.Debug.assert(state > 0 /* Uninitialized */, "Cannot modify the transformation context during initialization.");
+            ts.Debug.assert(state < 2 /* Completed */, "Cannot modify the transformation context after transformation has completed.");
+            ts.Debug.assert(!helper.scoped, "Cannot request a scoped emit helper.");
+            emitHelpers = ts.append(emitHelpers, helper);
+        }
+        function readEmitHelpers() {
+            ts.Debug.assert(state > 0 /* Uninitialized */, "Cannot modify the transformation context during initialization.");
+            ts.Debug.assert(state < 2 /* Completed */, "Cannot modify the transformation context after transformation has completed.");
+            var helpers = emitHelpers;
+            emitHelpers = undefined;
+            return helpers;
+        }
+        function dispose() {
+            if (state < 3 /* Disposed */) {
+                // Clean up emit nodes on parse tree
+                for (var _i = 0, nodes_7 = nodes; _i < nodes_7.length; _i++) {
+                    var node = nodes_7[_i];
+                    ts.disposeEmitNodes(ts.getSourceFileOfNode(ts.getParseTreeNode(node)));
+                }
+                // Release references to external entries for GC purposes.
+                lexicalEnvironmentVariableDeclarations = undefined;
+                lexicalEnvironmentVariableDeclarationsStack = undefined;
+                lexicalEnvironmentFunctionDeclarations = undefined;
+                lexicalEnvironmentFunctionDeclarationsStack = undefined;
+                onSubstituteNode = undefined;
+                onEmitNode = undefined;
+                emitHelpers = undefined;
+                // Prevent further use of the transformation result.
+                state = 3 /* Disposed */;
+            }
+        }
+    }
+    ts.transformNodes = transformNodes;
 })(ts || (ts = {}));
 /// <reference path="checker.ts"/>
 /* @internal */
@@ -55894,7 +67460,7 @@ var ts;
     function createSourceMapWriter(host, writer) {
         var compilerOptions = host.getCompilerOptions();
         var extendedDiagnostics = compilerOptions.extendedDiagnostics;
-        var currentSourceFile;
+        var currentSource;
         var currentSourceText;
         var sourceMapDir; // The directory in which sourcemap will be
         // Current source map file and its index in the sources list
@@ -55917,22 +67483,27 @@ var ts;
             getText: getText,
             getSourceMappingURL: getSourceMappingURL,
         };
+        /**
+         * Skips trivia such as comments and white-space that can optionally overriden by the source map source
+         */
+        function skipSourceTrivia(pos) {
+            return currentSource.skipTrivia ? currentSource.skipTrivia(pos) : ts.skipTrivia(currentSourceText, pos);
+        }
         /**
          * Initialize the SourceMapWriter for a new output file.
          *
          * @param filePath The path to the generated output file.
          * @param sourceMapFilePath The path to the output source map file.
-         * @param sourceFiles The input source files for the program.
-         * @param isBundledEmit A value indicating whether the generated output file is a bundle.
+         * @param sourceFileOrBundle The input source file or bundle for the program.
          */
-        function initialize(filePath, sourceMapFilePath, sourceFiles, isBundledEmit) {
+        function initialize(filePath, sourceMapFilePath, sourceFileOrBundle) {
             if (disabled) {
                 return;
             }
             if (sourceMapData) {
                 reset();
             }
-            currentSourceFile = undefined;
+            currentSource = undefined;
             currentSourceText = undefined;
             // Current source map file and its index in the sources list
             sourceMapSourceIndex = -1;
@@ -55961,11 +67532,10 @@ var ts;
             }
             if (compilerOptions.mapRoot) {
                 sourceMapDir = ts.normalizeSlashes(compilerOptions.mapRoot);
-                if (!isBundledEmit) {
-                    ts.Debug.assert(sourceFiles.length === 1);
+                if (sourceFileOrBundle.kind === 265 /* SourceFile */) {
                     // For modules or multiple emit files the mapRoot will have directory structure like the sources
                     // So if src\a.ts and src\lib\b.ts are compiled together user would be moving the maps into mapRoot\a.js.map and mapRoot\lib\b.js.map
-                    sourceMapDir = ts.getDirectoryPath(ts.getSourceFilePathInNewDir(sourceFiles[0], host, sourceMapDir));
+                    sourceMapDir = ts.getDirectoryPath(ts.getSourceFilePathInNewDir(sourceFileOrBundle, host, sourceMapDir));
                 }
                 if (!ts.isRootedDiskPath(sourceMapDir) && !ts.isUrl(sourceMapDir)) {
                     // The relative paths are relative to the common directory
@@ -55990,7 +67560,7 @@ var ts;
             if (disabled) {
                 return;
             }
-            currentSourceFile = undefined;
+            currentSource = undefined;
             sourceMapDir = undefined;
             sourceMapSourceIndex = undefined;
             lastRecordedSourceMapSpan = undefined;
@@ -56050,7 +67620,7 @@ var ts;
             if (extendedDiagnostics) {
                 ts.performance.mark("beforeSourcemap");
             }
-            var sourceLinePos = ts.getLineAndCharacterOfPosition(currentSourceFile, pos);
+            var sourceLinePos = ts.getLineAndCharacterOfPosition(currentSource, pos);
             // Convert the location to be one-based.
             sourceLinePos.line++;
             sourceLinePos.character++;
@@ -56088,35 +67658,49 @@ var ts;
         /**
          * Emits a node with possible leading and trailing source maps.
          *
+         * @param hint A hint as to the intended usage of the node.
          * @param node The node to emit.
          * @param emitCallback The callback used to emit the node.
          */
-        function emitNodeWithSourceMap(emitContext, node, emitCallback) {
+        function emitNodeWithSourceMap(hint, node, emitCallback) {
             if (disabled) {
-                return emitCallback(emitContext, node);
+                return emitCallback(hint, node);
             }
             if (node) {
                 var emitNode = node.emitNode;
                 var emitFlags = emitNode && emitNode.flags;
-                var _a = emitNode && emitNode.sourceMapRange || node, pos = _a.pos, end = _a.end;
-                if (node.kind !== 287 /* NotEmittedStatement */
-                    && (emitFlags & 512 /* NoLeadingSourceMap */) === 0
+                var range = emitNode && emitNode.sourceMapRange;
+                var _a = range || node, pos = _a.pos, end = _a.end;
+                var source = range && range.source;
+                var oldSource = currentSource;
+                if (source === oldSource)
+                    source = undefined;
+                if (source)
+                    setSourceFile(source);
+                if (node.kind !== 296 /* NotEmittedStatement */
+                    && (emitFlags & 16 /* NoLeadingSourceMap */) === 0
                     && pos >= 0) {
-                    emitPos(ts.skipTrivia(currentSourceText, pos));
+                    emitPos(skipSourceTrivia(pos));
                 }
-                if (emitFlags & 2048 /* NoNestedSourceMaps */) {
+                if (source)
+                    setSourceFile(oldSource);
+                if (emitFlags & 64 /* NoNestedSourceMaps */) {
                     disabled = true;
-                    emitCallback(emitContext, node);
+                    emitCallback(hint, node);
                     disabled = false;
                 }
                 else {
-                    emitCallback(emitContext, node);
+                    emitCallback(hint, node);
                 }
-                if (node.kind !== 287 /* NotEmittedStatement */
-                    && (emitFlags & 1024 /* NoTrailingSourceMap */) === 0
+                if (source)
+                    setSourceFile(source);
+                if (node.kind !== 296 /* NotEmittedStatement */
+                    && (emitFlags & 32 /* NoTrailingSourceMap */) === 0
                     && end >= 0) {
                     emitPos(end);
                 }
+                if (source)
+                    setSourceFile(oldSource);
             }
         }
         /**
@@ -56134,14 +67718,14 @@ var ts;
             var emitNode = node && node.emitNode;
             var emitFlags = emitNode && emitNode.flags;
             var range = emitNode && emitNode.tokenSourceMapRanges && emitNode.tokenSourceMapRanges[token];
-            tokenPos = ts.skipTrivia(currentSourceText, range ? range.pos : tokenPos);
-            if ((emitFlags & 4096 /* NoTokenLeadingSourceMaps */) === 0 && tokenPos >= 0) {
+            tokenPos = skipSourceTrivia(range ? range.pos : tokenPos);
+            if ((emitFlags & 128 /* NoTokenLeadingSourceMaps */) === 0 && tokenPos >= 0) {
                 emitPos(tokenPos);
             }
             tokenPos = emitCallback(token, tokenPos);
             if (range)
                 tokenPos = range.end;
-            if ((emitFlags & 8192 /* NoTokenTrailingSourceMaps */) === 0 && tokenPos >= 0) {
+            if ((emitFlags & 256 /* NoTokenTrailingSourceMaps */) === 0 && tokenPos >= 0) {
                 emitPos(tokenPos);
             }
             return tokenPos;
@@ -56155,22 +67739,22 @@ var ts;
             if (disabled) {
                 return;
             }
-            currentSourceFile = sourceFile;
-            currentSourceText = currentSourceFile.text;
+            currentSource = sourceFile;
+            currentSourceText = currentSource.text;
             // Add the file to tsFilePaths
             // If sourceroot option: Use the relative path corresponding to the common directory path
             // otherwise source locations relative to map file location
             var sourcesDirectoryPath = compilerOptions.sourceRoot ? host.getCommonSourceDirectory() : sourceMapDir;
-            var source = ts.getRelativePathToDirectoryOrUrl(sourcesDirectoryPath, currentSourceFile.fileName, host.getCurrentDirectory(), host.getCanonicalFileName, 
+            var source = ts.getRelativePathToDirectoryOrUrl(sourcesDirectoryPath, currentSource.fileName, host.getCurrentDirectory(), host.getCanonicalFileName, 
             /*isAbsolutePathAnUrl*/ true);
             sourceMapSourceIndex = ts.indexOf(sourceMapData.sourceMapSources, source);
             if (sourceMapSourceIndex === -1) {
                 sourceMapSourceIndex = sourceMapData.sourceMapSources.length;
                 sourceMapData.sourceMapSources.push(source);
                 // The one that can be used from program to get the actual source file
-                sourceMapData.inputSourceFileNames.push(currentSourceFile.fileName);
+                sourceMapData.inputSourceFileNames.push(currentSource.fileName);
                 if (compilerOptions.inlineSources) {
-                    sourceMapData.sourceMapSourcesContent.push(currentSourceFile.text);
+                    sourceMapData.sourceMapSourcesContent.push(currentSource.text);
                 }
             }
         }
@@ -56182,7 +67766,7 @@ var ts;
                 return;
             }
             encodeLastRecordedSourceMapSpan();
-            return ts.stringify({
+            return JSON.stringify({
                 version: 3,
                 file: sourceMapData.sourceMapFile,
                 sourceRoot: sourceMapData.sourceMapSourceRoot,
@@ -56247,11 +67831,10 @@ var ts;
 /* @internal */
 var ts;
 (function (ts) {
-    function createCommentWriter(host, writer, sourceMap) {
-        var compilerOptions = host.getCompilerOptions();
-        var extendedDiagnostics = compilerOptions.extendedDiagnostics;
-        var newLine = host.getNewLine();
-        var emitPos = sourceMap.emitPos;
+    function createCommentWriter(printerOptions, emitPos) {
+        var extendedDiagnostics = printerOptions.extendedDiagnostics;
+        var newLine = ts.getNewLineCharacter(printerOptions);
+        var writer;
         var containerPos = -1;
         var containerEnd = -1;
         var declarationListContainerEnd = -1;
@@ -56260,40 +67843,39 @@ var ts;
         var currentLineMap;
         var detachedCommentsInfo;
         var hasWrittenComment = false;
-        var disabled = compilerOptions.removeComments;
+        var disabled = printerOptions.removeComments;
         return {
             reset: reset,
+            setWriter: setWriter,
             setSourceFile: setSourceFile,
             emitNodeWithComments: emitNodeWithComments,
             emitBodyWithDetachedComments: emitBodyWithDetachedComments,
             emitTrailingCommentsOfPosition: emitTrailingCommentsOfPosition,
+            emitLeadingCommentsOfPosition: emitLeadingCommentsOfPosition,
         };
-        function emitNodeWithComments(emitContext, node, emitCallback) {
+        function emitNodeWithComments(hint, node, emitCallback) {
             if (disabled) {
-                emitCallback(emitContext, node);
+                emitCallback(hint, node);
                 return;
             }
             if (node) {
-                var _a = ts.getCommentRange(node), pos = _a.pos, end = _a.end;
-                var emitFlags = ts.getEmitFlags(node);
+                hasWrittenComment = false;
+                var emitNode = node.emitNode;
+                var emitFlags = emitNode && emitNode.flags;
+                var _a = emitNode && emitNode.commentRange || node, pos = _a.pos, end = _a.end;
                 if ((pos < 0 && end < 0) || (pos === end)) {
                     // Both pos and end are synthesized, so just emit the node without comments.
-                    if (emitFlags & 65536 /* NoNestedComments */) {
-                        disabled = true;
-                        emitCallback(emitContext, node);
-                        disabled = false;
-                    }
-                    else {
-                        emitCallback(emitContext, node);
-                    }
+                    emitNodeWithSynthesizedComments(hint, node, emitNode, emitFlags, emitCallback);
                 }
                 else {
                     if (extendedDiagnostics) {
                         ts.performance.mark("preEmitNodeWithComment");
                     }
-                    var isEmittedNode = node.kind !== 287 /* NotEmittedStatement */;
-                    var skipLeadingComments = pos < 0 || (emitFlags & 16384 /* NoLeadingComments */) !== 0;
-                    var skipTrailingComments = end < 0 || (emitFlags & 32768 /* NoTrailingComments */) !== 0;
+                    var isEmittedNode = node.kind !== 296 /* NotEmittedStatement */;
+                    // We have to explicitly check that the node is JsxText because if the compilerOptions.jsx is "preserve" we will not do any transformation.
+                    // It is expensive to walk entire tree just to set one kind of node to have no comments.
+                    var skipLeadingComments = pos < 0 || (emitFlags & 512 /* NoLeadingComments */) !== 0 || node.kind === 10 /* JsxText */;
+                    var skipTrailingComments = end < 0 || (emitFlags & 1024 /* NoTrailingComments */) !== 0 || node.kind === 10 /* JsxText */;
                     // Emit leading comments if the position is not synthesized and the node
                     // has not opted out from emitting leading comments.
                     if (!skipLeadingComments) {
@@ -56310,23 +67892,16 @@ var ts;
                         containerEnd = end;
                         // To avoid invalid comment emit in a down-level binding pattern, we
                         // keep track of the last declaration list container's end
-                        if (node.kind === 219 /* VariableDeclarationList */) {
+                        if (node.kind === 227 /* VariableDeclarationList */) {
                             declarationListContainerEnd = end;
                         }
                     }
                     if (extendedDiagnostics) {
                         ts.performance.measure("commentTime", "preEmitNodeWithComment");
                     }
-                    if (emitFlags & 65536 /* NoNestedComments */) {
-                        disabled = true;
-                        emitCallback(emitContext, node);
-                        disabled = false;
-                    }
-                    else {
-                        emitCallback(emitContext, node);
-                    }
+                    emitNodeWithSynthesizedComments(hint, node, emitNode, emitFlags, emitCallback);
                     if (extendedDiagnostics) {
-                        ts.performance.mark("beginEmitNodeWithComment");
+                        ts.performance.mark("postEmitNodeWithComment");
                     }
                     // Restore previous container state.
                     containerPos = savedContainerPos;
@@ -56338,26 +67913,90 @@ var ts;
                         emitTrailingComments(end);
                     }
                     if (extendedDiagnostics) {
-                        ts.performance.measure("commentTime", "beginEmitNodeWithComment");
+                        ts.performance.measure("commentTime", "postEmitNodeWithComment");
                     }
                 }
             }
         }
+        function emitNodeWithSynthesizedComments(hint, node, emitNode, emitFlags, emitCallback) {
+            var leadingComments = emitNode && emitNode.leadingComments;
+            if (ts.some(leadingComments)) {
+                if (extendedDiagnostics) {
+                    ts.performance.mark("preEmitNodeWithSynthesizedComments");
+                }
+                ts.forEach(leadingComments, emitLeadingSynthesizedComment);
+                if (extendedDiagnostics) {
+                    ts.performance.measure("commentTime", "preEmitNodeWithSynthesizedComments");
+                }
+            }
+            emitNodeWithNestedComments(hint, node, emitFlags, emitCallback);
+            var trailingComments = emitNode && emitNode.trailingComments;
+            if (ts.some(trailingComments)) {
+                if (extendedDiagnostics) {
+                    ts.performance.mark("postEmitNodeWithSynthesizedComments");
+                }
+                ts.forEach(trailingComments, emitTrailingSynthesizedComment);
+                if (extendedDiagnostics) {
+                    ts.performance.measure("commentTime", "postEmitNodeWithSynthesizedComments");
+                }
+            }
+        }
+        function emitLeadingSynthesizedComment(comment) {
+            if (comment.kind === 2 /* SingleLineCommentTrivia */) {
+                writer.writeLine();
+            }
+            writeSynthesizedComment(comment);
+            if (comment.hasTrailingNewLine || comment.kind === 2 /* SingleLineCommentTrivia */) {
+                writer.writeLine();
+            }
+            else {
+                writer.write(" ");
+            }
+        }
+        function emitTrailingSynthesizedComment(comment) {
+            if (!writer.isAtStartOfLine()) {
+                writer.write(" ");
+            }
+            writeSynthesizedComment(comment);
+            if (comment.hasTrailingNewLine) {
+                writer.writeLine();
+            }
+        }
+        function writeSynthesizedComment(comment) {
+            var text = formatSynthesizedComment(comment);
+            var lineMap = comment.kind === 3 /* MultiLineCommentTrivia */ ? ts.computeLineStarts(text) : undefined;
+            ts.writeCommentRange(text, lineMap, writer, 0, text.length, newLine);
+        }
+        function formatSynthesizedComment(comment) {
+            return comment.kind === 3 /* MultiLineCommentTrivia */
+                ? "/*" + comment.text + "*/"
+                : "//" + comment.text;
+        }
+        function emitNodeWithNestedComments(hint, node, emitFlags, emitCallback) {
+            if (emitFlags & 2048 /* NoNestedComments */) {
+                disabled = true;
+                emitCallback(hint, node);
+                disabled = false;
+            }
+            else {
+                emitCallback(hint, node);
+            }
+        }
         function emitBodyWithDetachedComments(node, detachedRange, emitCallback) {
             if (extendedDiagnostics) {
                 ts.performance.mark("preEmitBodyWithDetachedComments");
             }
             var pos = detachedRange.pos, end = detachedRange.end;
             var emitFlags = ts.getEmitFlags(node);
-            var skipLeadingComments = pos < 0 || (emitFlags & 16384 /* NoLeadingComments */) !== 0;
-            var skipTrailingComments = disabled || end < 0 || (emitFlags & 32768 /* NoTrailingComments */) !== 0;
+            var skipLeadingComments = pos < 0 || (emitFlags & 512 /* NoLeadingComments */) !== 0;
+            var skipTrailingComments = disabled || end < 0 || (emitFlags & 1024 /* NoTrailingComments */) !== 0;
             if (!skipLeadingComments) {
                 emitDetachedCommentsAndUpdateCommentsInfo(detachedRange);
             }
             if (extendedDiagnostics) {
                 ts.performance.measure("commentTime", "preEmitBodyWithDetachedComments");
             }
-            if (emitFlags & 65536 /* NoNestedComments */ && !disabled) {
+            if (emitFlags & 2048 /* NoNestedComments */ && !disabled) {
                 disabled = true;
                 emitCallback(node);
                 disabled = false;
@@ -56370,6 +68009,9 @@ var ts;
             }
             if (!skipTrailingComments) {
                 emitLeadingComments(detachedRange.end, /*isEmittedNode*/ true);
+                if (hasWrittenComment && !writer.isAtStartOfLine()) {
+                    writer.writeLine();
+                }
             }
             if (extendedDiagnostics) {
                 ts.performance.measure("commentTime", "beginEmitBodyWithDetachedCommetns");
@@ -56397,15 +68039,17 @@ var ts;
                 emitLeadingComment(commentPos, commentEnd, kind, hasTrailingNewLine, rangePos);
             }
         }
-        function emitLeadingComment(commentPos, commentEnd, kind, hasTrailingNewLine, rangePos) {
+        function emitLeadingComment(commentPos, commentEnd, _kind, hasTrailingNewLine, rangePos) {
             if (!hasWrittenComment) {
                 ts.emitNewLineBeforeLeadingCommentOfPosition(currentLineMap, writer, rangePos, commentPos);
                 hasWrittenComment = true;
             }
             // Leading comments are emitted at /*leading comment1 */space/*leading comment*/space
-            emitPos(commentPos);
+            if (emitPos)
+                emitPos(commentPos);
             ts.writeCommentRange(currentText, currentLineMap, writer, commentPos, commentEnd, newLine);
-            emitPos(commentEnd);
+            if (emitPos)
+                emitPos(commentEnd);
             if (hasTrailingNewLine) {
                 writer.writeLine();
             }
@@ -56413,17 +68057,25 @@ var ts;
                 writer.write(" ");
             }
         }
+        function emitLeadingCommentsOfPosition(pos) {
+            if (disabled || pos === -1) {
+                return;
+            }
+            emitLeadingComments(pos, /*isEmittedNode*/ true);
+        }
         function emitTrailingComments(pos) {
             forEachTrailingCommentToEmit(pos, emitTrailingComment);
         }
-        function emitTrailingComment(commentPos, commentEnd, kind, hasTrailingNewLine) {
+        function emitTrailingComment(commentPos, commentEnd, _kind, hasTrailingNewLine) {
             // trailing comments are emitted at space/*trailing comment1 */space/*trailing comment2*/
             if (!writer.isAtStartOfLine()) {
                 writer.write(" ");
             }
-            emitPos(commentPos);
+            if (emitPos)
+                emitPos(commentPos);
             ts.writeCommentRange(currentText, currentLineMap, writer, commentPos, commentEnd, newLine);
-            emitPos(commentEnd);
+            if (emitPos)
+                emitPos(commentEnd);
             if (hasTrailingNewLine) {
                 writer.writeLine();
             }
@@ -56440,11 +68092,13 @@ var ts;
                 ts.performance.measure("commentTime", "beforeEmitTrailingCommentsOfPosition");
             }
         }
-        function emitTrailingCommentOfPosition(commentPos, commentEnd, kind, hasTrailingNewLine) {
+        function emitTrailingCommentOfPosition(commentPos, commentEnd, _kind, hasTrailingNewLine) {
             // trailing comments of a position are emitted at /*trailing comment1 */space/*trailing comment*/space
-            emitPos(commentPos);
+            if (emitPos)
+                emitPos(commentPos);
             ts.writeCommentRange(currentText, currentLineMap, writer, commentPos, commentEnd, newLine);
-            emitPos(commentEnd);
+            if (emitPos)
+                emitPos(commentEnd);
             if (hasTrailingNewLine) {
                 writer.writeLine();
             }
@@ -56475,6 +68129,9 @@ var ts;
             currentLineMap = undefined;
             detachedCommentsInfo = undefined;
         }
+        function setWriter(output) {
+            writer = output;
+        }
         function setSourceFile(sourceFile) {
             currentSourceFile = sourceFile;
             currentText = currentSourceFile.text;
@@ -56507,15 +68164,17 @@ var ts;
             }
         }
         function writeComment(text, lineMap, writer, commentPos, commentEnd, newLine) {
-            emitPos(commentPos);
+            if (emitPos)
+                emitPos(commentPos);
             ts.writeCommentRange(text, lineMap, writer, commentPos, commentEnd, newLine);
-            emitPos(commentEnd);
+            if (emitPos)
+                emitPos(commentEnd);
         }
         /**
          * Determine if the given comment is a triple-slash
          *
          * @return true if the comment is a triple-slash comment else false
-         **/
+         */
         function isTripleSlashComment(commentPos, commentEnd) {
             // Verify this is /// comment, but do the regexp match only when we first can find /// in the comment text
             // so that we don't end up computing comment string and doing match for all // comments
@@ -56532,167 +68191,131 @@ var ts;
     }
     ts.createCommentWriter = createCommentWriter;
 })(ts || (ts = {}));
-/// <reference path="checker.ts"/>
+/// <reference path="checker.ts" />
 /// <reference path="transformer.ts" />
-/// <reference path="declarationEmitter.ts"/>
-/// <reference path="sourcemap.ts"/>
+/// <reference path="declarationEmitter.ts" />
+/// <reference path="sourcemap.ts" />
 /// <reference path="comments.ts" />
-/* @internal */
 var ts;
 (function (ts) {
-    // Flags enum to track count of temp variables and a few dedicated names
-    var TempFlags;
-    (function (TempFlags) {
-        TempFlags[TempFlags["Auto"] = 0] = "Auto";
-        TempFlags[TempFlags["CountMask"] = 268435455] = "CountMask";
-        TempFlags[TempFlags["_i"] = 268435456] = "_i";
-    })(TempFlags || (TempFlags = {}));
-    var id = function (s) { return s; };
-    var nullTransformers = [function (ctx) { return id; }];
+    var delimiters = createDelimiterMap();
+    var brackets = createBracketsMap();
+    /*@internal*/
+    /**
+     * Iterates over the source files that are expected to have an emit output.
+     *
+     * @param host An EmitHost.
+     * @param action The action to execute.
+     * @param sourceFilesOrTargetSourceFile
+     *   If an array, the full list of source files to emit.
+     *   Else, calls `getSourceFilesToEmit` with the (optional) target source file to determine the list of source files to emit.
+     */
+    function forEachEmittedFile(host, action, sourceFilesOrTargetSourceFile, emitOnlyDtsFiles) {
+        var sourceFiles = ts.isArray(sourceFilesOrTargetSourceFile) ? sourceFilesOrTargetSourceFile : ts.getSourceFilesToEmit(host, sourceFilesOrTargetSourceFile);
+        var options = host.getCompilerOptions();
+        if (options.outFile || options.out) {
+            if (sourceFiles.length) {
+                var jsFilePath = options.outFile || options.out;
+                var sourceMapFilePath = getSourceMapFilePath(jsFilePath, options);
+                var declarationFilePath = options.declaration ? ts.removeFileExtension(jsFilePath) + ".d.ts" /* Dts */ : "";
+                action({ jsFilePath: jsFilePath, sourceMapFilePath: sourceMapFilePath, declarationFilePath: declarationFilePath }, ts.createBundle(sourceFiles), emitOnlyDtsFiles);
+            }
+        }
+        else {
+            for (var _a = 0, sourceFiles_1 = sourceFiles; _a < sourceFiles_1.length; _a++) {
+                var sourceFile = sourceFiles_1[_a];
+                var jsFilePath = ts.getOwnEmitOutputFilePath(sourceFile, host, getOutputExtension(sourceFile, options));
+                var sourceMapFilePath = getSourceMapFilePath(jsFilePath, options);
+                var declarationFilePath = !ts.isSourceFileJavaScript(sourceFile) && (emitOnlyDtsFiles || options.declaration) ? ts.getDeclarationEmitOutputFilePath(sourceFile, host) : undefined;
+                action({ jsFilePath: jsFilePath, sourceMapFilePath: sourceMapFilePath, declarationFilePath: declarationFilePath }, sourceFile, emitOnlyDtsFiles);
+            }
+        }
+    }
+    ts.forEachEmittedFile = forEachEmittedFile;
+    function getSourceMapFilePath(jsFilePath, options) {
+        return options.sourceMap ? jsFilePath + ".map" : undefined;
+    }
+    // JavaScript files are always LanguageVariant.JSX, as JSX syntax is allowed in .js files also.
+    // So for JavaScript files, '.jsx' is only emitted if the input was '.jsx', and JsxEmit.Preserve.
+    // For TypeScript, the only time to emit with a '.jsx' extension, is on JSX input, and JsxEmit.Preserve
+    function getOutputExtension(sourceFile, options) {
+        if (options.jsx === 1 /* Preserve */) {
+            if (ts.isSourceFileJavaScript(sourceFile)) {
+                if (ts.fileExtensionIs(sourceFile.fileName, ".jsx" /* Jsx */)) {
+                    return ".jsx" /* Jsx */;
+                }
+            }
+            else if (sourceFile.languageVariant === 1 /* JSX */) {
+                // TypeScript source file preserving JSX syntax
+                return ".jsx" /* Jsx */;
+            }
+        }
+        return ".js" /* Js */;
+    }
+    function getOriginalSourceFileOrBundle(sourceFileOrBundle) {
+        if (sourceFileOrBundle.kind === 266 /* Bundle */) {
+            return ts.updateBundle(sourceFileOrBundle, ts.sameMap(sourceFileOrBundle.sourceFiles, ts.getOriginalSourceFile));
+        }
+        return ts.getOriginalSourceFile(sourceFileOrBundle);
+    }
+    /*@internal*/
     // targetSourceFile is when users only want one file in entire project to be emitted. This is used in compileOnSave feature
-    function emitFiles(resolver, host, targetSourceFile, emitOnlyDtsFiles) {
-        var delimiters = createDelimiterMap();
-        var brackets = createBracketsMap();
-        // emit output for the __extends helper function
-        var extendsHelper = "\nvar __extends = (this && this.__extends) || function (d, b) {\n    for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];\n    function __() { this.constructor = d; }\n    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\n};";
-        // Emit output for the __assign helper function.
-        // This is typically used for JSX spread attributes,
-        // and can be used for object literal spread properties.
-        var assignHelper = "\nvar __assign = (this && this.__assign) || Object.assign || function(t) {\n    for (var s, i = 1, n = arguments.length; i < n; i++) {\n        s = arguments[i];\n        for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))\n            t[p] = s[p];\n    }\n    return t;\n};";
-        // emit output for the __decorate helper function
-        var decorateHelper = "\nvar __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {\n    var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;\n    if (typeof Reflect === \"object\" && typeof Reflect.decorate === \"function\") r = Reflect.decorate(decorators, target, key, desc);\n    else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;\n    return c > 3 && r && Object.defineProperty(target, key, r), r;\n};";
-        // emit output for the __metadata helper function
-        var metadataHelper = "\nvar __metadata = (this && this.__metadata) || function (k, v) {\n    if (typeof Reflect === \"object\" && typeof Reflect.metadata === \"function\") return Reflect.metadata(k, v);\n};";
-        // emit output for the __param helper function
-        var paramHelper = "\nvar __param = (this && this.__param) || function (paramIndex, decorator) {\n    return function (target, key) { decorator(target, key, paramIndex); }\n};";
-        // emit output for the __awaiter helper function
-        var awaiterHelper = "\nvar __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {\n    return new (P || (P = Promise))(function (resolve, reject) {\n        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }\n        function rejected(value) { try { step(generator.throw(value)); } catch (e) { reject(e); } }\n        function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }\n        step((generator = generator.apply(thisArg, _arguments)).next());\n    });\n};";
-        // The __generator helper is used by down-level transformations to emulate the runtime
-        // semantics of an ES2015 generator function. When called, this helper returns an
-        // object that implements the Iterator protocol, in that it has `next`, `return`, and
-        // `throw` methods that step through the generator when invoked.
-        //
-        // parameters:
-        //  thisArg  The value to use as the `this` binding for the transformed generator body.
-        //  body     A function that acts as the transformed generator body.
-        //
-        // variables:
-        //  _       Persistent state for the generator that is shared between the helper and the
-        //          generator body. The state object has the following members:
-        //            sent() - A method that returns or throws the current completion value.
-        //            label  - The next point at which to resume evaluation of the generator body.
-        //            trys   - A stack of protected regions (try/catch/finally blocks).
-        //            ops    - A stack of pending instructions when inside of a finally block.
-        //  f       A value indicating whether the generator is executing.
-        //  y       An iterator to delegate for a yield*.
-        //  t       A temporary variable that holds one of the following values (note that these
-        //          cases do not overlap):
-        //          - The completion value when resuming from a `yield` or `yield*`.
-        //          - The error value for a catch block.
-        //          - The current protected region (array of try/catch/finally/end labels).
-        //          - The verb (`next`, `throw`, or `return` method) to delegate to the expression
-        //            of a `yield*`.
-        //          - The result of evaluating the verb delegated to the expression of a `yield*`.
-        //
-        // functions:
-        //  verb(n)     Creates a bound callback to the `step` function for opcode `n`.
-        //  step(op)    Evaluates opcodes in a generator body until execution is suspended or
-        //              completed.
-        //
-        // The __generator helper understands a limited set of instructions:
-        //  0: next(value?)     - Start or resume the generator with the specified value.
-        //  1: throw(error)     - Resume the generator with an exception. If the generator is
-        //                        suspended inside of one or more protected regions, evaluates
-        //                        any intervening finally blocks between the current label and
-        //                        the nearest catch block or function boundary. If uncaught, the
-        //                        exception is thrown to the caller.
-        //  2: return(value?)   - Resume the generator as if with a return. If the generator is
-        //                        suspended inside of one or more protected regions, evaluates any
-        //                        intervening finally blocks.
-        //  3: break(label)     - Jump to the specified label. If the label is outside of the
-        //                        current protected region, evaluates any intervening finally
-        //                        blocks.
-        //  4: yield(value?)    - Yield execution to the caller with an optional value. When
-        //                        resumed, the generator will continue at the next label.
-        //  5: yield*(value)    - Delegates evaluation to the supplied iterator. When
-        //                        delegation completes, the generator will continue at the next
-        //                        label.
-        //  6: catch(error)     - Handles an exception thrown from within the generator body. If
-        //                        the current label is inside of one or more protected regions,
-        //                        evaluates any intervening finally blocks between the current
-        //                        label and the nearest catch block or function boundary. If
-        //                        uncaught, the exception is thrown to the caller.
-        //  7: endfinally       - Ends a finally block, resuming the last instruction prior to
-        //                        entering a finally block.
-        //
-        // For examples of how these are used, see the comments in ./transformers/generators.ts
-        var generatorHelper = "\nvar __generator = (this && this.__generator) || function (thisArg, body) {\n    var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t;\n    return { next: verb(0), \"throw\": verb(1), \"return\": verb(2) };\n    function verb(n) { return function (v) { return step([n, v]); }; }\n    function step(op) {\n        if (f) throw new TypeError(\"Generator is already executing.\");\n        while (_) try {\n            if (f = 1, y && (t = y[op[0] & 2 ? \"return\" : op[0] ? \"throw\" : \"next\"]) && !(t = t.call(y, op[1])).done) return t;\n            if (y = 0, t) op = [0, t.value];\n            switch (op[0]) {\n                case 0: case 1: t = op; break;\n                case 4: _.label++; return { value: op[1], done: false };\n                case 5: _.label++; y = op[1]; op = [0]; continue;\n                case 7: op = _.ops.pop(); _.trys.pop(); continue;\n                default:\n                    if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }\n                    if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }\n                    if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }\n                    if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }\n                    if (t[2]) _.ops.pop();\n                    _.trys.pop(); continue;\n            }\n            op = body.call(thisArg, _);\n        } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }\n        if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };\n    }\n};";
-        // emit output for the __export helper function
-        var exportStarHelper = "\nfunction __export(m) {\n    for (var p in m) if (!exports.hasOwnProperty(p)) exports[p] = m[p];\n}";
-        // emit output for the UMD helper function.
-        var umdHelper = "\n(function (dependencies, factory) {\n    if (typeof module === 'object' && typeof module.exports === 'object') {\n        var v = factory(require, exports); if (v !== undefined) module.exports = v;\n    }\n    else if (typeof define === 'function' && define.amd) {\n        define(dependencies, factory);\n    }\n})";
-        var superHelper = "\nconst _super = name => super[name];";
-        var advancedSuperHelper = "\nconst _super = (function (geti, seti) {\n    const cache = Object.create(null);\n    return name => cache[name] || (cache[name] = { get value() { return geti(name); }, set value(v) { seti(name, v); } });\n})(name => super[name], (name, value) => super[name] = value);";
+    function emitFiles(resolver, host, targetSourceFile, emitOnlyDtsFiles, transformers) {
         var compilerOptions = host.getCompilerOptions();
-        var languageVersion = ts.getEmitScriptTarget(compilerOptions);
         var moduleKind = ts.getEmitModuleKind(compilerOptions);
         var sourceMapDataList = compilerOptions.sourceMap || compilerOptions.inlineSourceMap ? [] : undefined;
         var emittedFilesList = compilerOptions.listEmittedFiles ? [] : undefined;
         var emitterDiagnostics = ts.createDiagnosticCollection();
         var newLine = host.getNewLine();
-        var transformers = emitOnlyDtsFiles ? nullTransformers : ts.getTransformers(compilerOptions);
         var writer = ts.createTextWriter(newLine);
-        var write = writer.write, writeLine = writer.writeLine, increaseIndent = writer.increaseIndent, decreaseIndent = writer.decreaseIndent;
         var sourceMap = ts.createSourceMapWriter(host, writer);
-        var emitNodeWithSourceMap = sourceMap.emitNodeWithSourceMap, emitTokenWithSourceMap = sourceMap.emitTokenWithSourceMap;
-        var comments = ts.createCommentWriter(host, writer, sourceMap);
-        var emitNodeWithComments = comments.emitNodeWithComments, emitBodyWithDetachedComments = comments.emitBodyWithDetachedComments, emitTrailingCommentsOfPosition = comments.emitTrailingCommentsOfPosition;
-        var nodeIdToGeneratedName;
-        var autoGeneratedIdToGeneratedName;
-        var generatedNameSet;
-        var tempFlags;
         var currentSourceFile;
-        var currentText;
-        var currentFileIdentifiers;
-        var extendsEmitted;
-        var assignEmitted;
-        var decorateEmitted;
-        var paramEmitted;
-        var awaiterEmitted;
+        var bundledHelpers;
         var isOwnFileEmit;
         var emitSkipped = false;
         var sourceFiles = ts.getSourceFilesToEmit(host, targetSourceFile);
         // Transform the source files
-        ts.performance.mark("beforeTransform");
-        var _a = ts.transformFiles(resolver, host, sourceFiles, transformers), transformed = _a.transformed, emitNodeWithSubstitution = _a.emitNodeWithSubstitution, emitNodeWithNotification = _a.emitNodeWithNotification;
-        ts.performance.measure("transformTime", "beforeTransform");
+        var transform = ts.transformNodes(resolver, host, compilerOptions, sourceFiles, transformers, /*allowDtsFiles*/ false);
+        // Create a printer to print the nodes
+        var printer = createPrinter(compilerOptions, {
+            // resolver hooks
+            hasGlobalName: resolver.hasGlobalName,
+            // transform hooks
+            onEmitNode: transform.emitNodeWithNotification,
+            substituteNode: transform.substituteNode,
+            // sourcemap hooks
+            onEmitSourceMapOfNode: sourceMap.emitNodeWithSourceMap,
+            onEmitSourceMapOfToken: sourceMap.emitTokenWithSourceMap,
+            onEmitSourceMapOfPosition: sourceMap.emitPos,
+            // emitter hooks
+            onEmitHelpers: emitHelpers,
+            onSetSourceFile: setSourceFile,
+        });
         // Emit each output file
         ts.performance.mark("beforePrint");
-        ts.forEachTransformedEmitFile(host, transformed, emitFile, emitOnlyDtsFiles);
+        forEachEmittedFile(host, emitSourceFileOrBundle, transform.transformed, emitOnlyDtsFiles);
         ts.performance.measure("printTime", "beforePrint");
         // Clean up emit nodes on parse tree
-        for (var _b = 0, sourceFiles_4 = sourceFiles; _b < sourceFiles_4.length; _b++) {
-            var sourceFile = sourceFiles_4[_b];
-            ts.disposeEmitNodes(sourceFile);
-        }
+        transform.dispose();
         return {
             emitSkipped: emitSkipped,
             diagnostics: emitterDiagnostics.getDiagnostics(),
             emittedFiles: emittedFilesList,
             sourceMaps: sourceMapDataList
         };
-        function emitFile(jsFilePath, sourceMapFilePath, declarationFilePath, sourceFiles, isBundledEmit) {
+        function emitSourceFileOrBundle(_a, sourceFileOrBundle) {
+            var jsFilePath = _a.jsFilePath, sourceMapFilePath = _a.sourceMapFilePath, declarationFilePath = _a.declarationFilePath;
             // Make sure not to write js file and source map file if any of them cannot be written
             if (!host.isEmitBlocked(jsFilePath) && !compilerOptions.noEmit) {
                 if (!emitOnlyDtsFiles) {
-                    printFile(jsFilePath, sourceMapFilePath, sourceFiles, isBundledEmit);
+                    printSourceFileOrBundle(jsFilePath, sourceMapFilePath, sourceFileOrBundle);
                 }
             }
             else {
                 emitSkipped = true;
             }
             if (declarationFilePath) {
-                emitSkipped = ts.writeDeclarationFile(declarationFilePath, ts.getOriginalSourceFiles(sourceFiles), isBundledEmit, host, resolver, emitterDiagnostics, emitOnlyDtsFiles) || emitSkipped;
+                emitSkipped = ts.writeDeclarationFile(declarationFilePath, getOriginalSourceFileOrBundle(sourceFileOrBundle), host, resolver, emitterDiagnostics, emitOnlyDtsFiles) || emitSkipped;
             }
             if (!emitSkipped && emittedFilesList) {
                 if (!emitOnlyDtsFiles) {
@@ -56706,491 +68329,581 @@ var ts;
                 }
             }
         }
-        function printFile(jsFilePath, sourceMapFilePath, sourceFiles, isBundledEmit) {
-            sourceMap.initialize(jsFilePath, sourceMapFilePath, sourceFiles, isBundledEmit);
-            nodeIdToGeneratedName = [];
-            autoGeneratedIdToGeneratedName = [];
-            generatedNameSet = ts.createMap();
-            isOwnFileEmit = !isBundledEmit;
-            // Emit helpers from all the files
-            if (isBundledEmit && moduleKind) {
-                for (var _a = 0, sourceFiles_5 = sourceFiles; _a < sourceFiles_5.length; _a++) {
-                    var sourceFile = sourceFiles_5[_a];
-                    emitEmitHelpers(sourceFile);
-                }
+        function printSourceFileOrBundle(jsFilePath, sourceMapFilePath, sourceFileOrBundle) {
+            var bundle = sourceFileOrBundle.kind === 266 /* Bundle */ ? sourceFileOrBundle : undefined;
+            var sourceFile = sourceFileOrBundle.kind === 265 /* SourceFile */ ? sourceFileOrBundle : undefined;
+            var sourceFiles = bundle ? bundle.sourceFiles : [sourceFile];
+            sourceMap.initialize(jsFilePath, sourceMapFilePath, sourceFileOrBundle);
+            if (bundle) {
+                bundledHelpers = ts.createMap();
+                isOwnFileEmit = false;
+                printer.writeBundle(bundle, writer);
             }
-            // Print each transformed source file.
-            ts.forEach(sourceFiles, printSourceFile);
-            writeLine();
+            else {
+                isOwnFileEmit = true;
+                printer.writeFile(sourceFile, writer);
+            }
+            writer.writeLine();
             var sourceMappingURL = sourceMap.getSourceMappingURL();
             if (sourceMappingURL) {
-                write("//# " + "sourceMappingURL" + "=" + sourceMappingURL); // Sometimes tools can sometimes see this line as a source mapping url comment
+                writer.write("//# " + "sourceMappingURL" + "=" + sourceMappingURL); // Sometimes tools can sometimes see this line as a source mapping url comment
             }
             // Write the source map
             if (compilerOptions.sourceMap && !compilerOptions.inlineSourceMap) {
-                ts.writeFile(host, emitterDiagnostics, sourceMapFilePath, sourceMap.getText(), /*writeByteOrderMark*/ false);
+                ts.writeFile(host, emitterDiagnostics, sourceMapFilePath, sourceMap.getText(), /*writeByteOrderMark*/ false, sourceFiles);
             }
             // Record source map data for the test harness.
             if (sourceMapDataList) {
                 sourceMapDataList.push(sourceMap.getSourceMapData());
             }
             // Write the output file
-            ts.writeFile(host, emitterDiagnostics, jsFilePath, writer.getText(), compilerOptions.emitBOM);
+            ts.writeFile(host, emitterDiagnostics, jsFilePath, writer.getText(), compilerOptions.emitBOM, sourceFiles);
             // Reset state
             sourceMap.reset();
-            comments.reset();
             writer.reset();
-            tempFlags = 0 /* Auto */;
             currentSourceFile = undefined;
-            currentText = undefined;
-            extendsEmitted = false;
-            assignEmitted = false;
-            decorateEmitted = false;
-            paramEmitted = false;
-            awaiterEmitted = false;
+            bundledHelpers = undefined;
             isOwnFileEmit = false;
         }
-        function printSourceFile(node) {
+        function setSourceFile(node) {
             currentSourceFile = node;
-            currentText = node.text;
-            currentFileIdentifiers = node.identifiers;
             sourceMap.setSourceFile(node);
-            comments.setSourceFile(node);
-            pipelineEmitWithNotification(0 /* SourceFile */, node);
         }
-        /**
-         * Emits a node.
-         */
+        function emitHelpers(node, writeLines) {
+            var helpersEmitted = false;
+            var bundle = node.kind === 266 /* Bundle */ ? node : undefined;
+            if (bundle && moduleKind === ts.ModuleKind.None) {
+                return;
+            }
+            var numNodes = bundle ? bundle.sourceFiles.length : 1;
+            for (var i = 0; i < numNodes; i++) {
+                var currentNode = bundle ? bundle.sourceFiles[i] : node;
+                var sourceFile = ts.isSourceFile(currentNode) ? currentNode : currentSourceFile;
+                var shouldSkip = compilerOptions.noEmitHelpers || ts.getExternalHelpersModuleName(sourceFile) !== undefined;
+                var shouldBundle = ts.isSourceFile(currentNode) && !isOwnFileEmit;
+                var helpers = ts.getEmitHelpers(currentNode);
+                if (helpers) {
+                    for (var _a = 0, _b = ts.stableSort(helpers, ts.compareEmitHelpers); _a < _b.length; _a++) {
+                        var helper = _b[_a];
+                        if (!helper.scoped) {
+                            // Skip the helper if it can be skipped and the noEmitHelpers compiler
+                            // option is set, or if it can be imported and the importHelpers compiler
+                            // option is set.
+                            if (shouldSkip)
+                                continue;
+                            // Skip the helper if it can be bundled but hasn't already been emitted and we
+                            // are emitting a bundled module.
+                            if (shouldBundle) {
+                                if (bundledHelpers.get(helper.name)) {
+                                    continue;
+                                }
+                                bundledHelpers.set(helper.name, true);
+                            }
+                        }
+                        else if (bundle) {
+                            // Skip the helper if it is scoped and we are emitting bundled helpers
+                            continue;
+                        }
+                        writeLines(helper.text);
+                        helpersEmitted = true;
+                    }
+                }
+            }
+            return helpersEmitted;
+        }
+    }
+    ts.emitFiles = emitFiles;
+    function createPrinter(printerOptions, handlers) {
+        if (printerOptions === void 0) { printerOptions = {}; }
+        if (handlers === void 0) { handlers = {}; }
+        var hasGlobalName = handlers.hasGlobalName, onEmitSourceMapOfNode = handlers.onEmitSourceMapOfNode, onEmitSourceMapOfToken = handlers.onEmitSourceMapOfToken, onEmitSourceMapOfPosition = handlers.onEmitSourceMapOfPosition, onEmitNode = handlers.onEmitNode, onEmitHelpers = handlers.onEmitHelpers, onSetSourceFile = handlers.onSetSourceFile, substituteNode = handlers.substituteNode, onBeforeEmitNodeArray = handlers.onBeforeEmitNodeArray, onAfterEmitNodeArray = handlers.onAfterEmitNodeArray, onBeforeEmitToken = handlers.onBeforeEmitToken, onAfterEmitToken = handlers.onAfterEmitToken;
+        var newLine = ts.getNewLineCharacter(printerOptions);
+        var comments = ts.createCommentWriter(printerOptions, onEmitSourceMapOfPosition);
+        var emitNodeWithComments = comments.emitNodeWithComments, emitBodyWithDetachedComments = comments.emitBodyWithDetachedComments, emitTrailingCommentsOfPosition = comments.emitTrailingCommentsOfPosition, emitLeadingCommentsOfPosition = comments.emitLeadingCommentsOfPosition;
+        var currentSourceFile;
+        var nodeIdToGeneratedName; // Map of generated names for specific nodes.
+        var autoGeneratedIdToGeneratedName; // Map of generated names for temp and loop variables.
+        var generatedNames; // Set of names generated by the NameGenerator.
+        var tempFlagsStack; // Stack of enclosing name generation scopes.
+        var tempFlags; // TempFlags for the current name generation scope.
+        var writer;
+        var ownWriter;
+        reset();
+        return {
+            // public API
+            printNode: printNode,
+            printFile: printFile,
+            printBundle: printBundle,
+            // internal API
+            writeNode: writeNode,
+            writeFile: writeFile,
+            writeBundle: writeBundle
+        };
+        function printNode(hint, node, sourceFile) {
+            switch (hint) {
+                case 0 /* SourceFile */:
+                    ts.Debug.assert(ts.isSourceFile(node), "Expected a SourceFile node.");
+                    break;
+                case 2 /* IdentifierName */:
+                    ts.Debug.assert(ts.isIdentifier(node), "Expected an Identifier node.");
+                    break;
+                case 1 /* Expression */:
+                    ts.Debug.assert(ts.isExpression(node), "Expected an Expression node.");
+                    break;
+            }
+            switch (node.kind) {
+                case 265 /* SourceFile */: return printFile(node);
+                case 266 /* Bundle */: return printBundle(node);
+            }
+            writeNode(hint, node, sourceFile, beginPrint());
+            return endPrint();
+        }
+        function printBundle(bundle) {
+            writeBundle(bundle, beginPrint());
+            return endPrint();
+        }
+        function printFile(sourceFile) {
+            writeFile(sourceFile, beginPrint());
+            return endPrint();
+        }
+        function writeNode(hint, node, sourceFile, output) {
+            var previousWriter = writer;
+            setWriter(output);
+            print(hint, node, sourceFile);
+            reset();
+            writer = previousWriter;
+        }
+        function writeBundle(bundle, output) {
+            var previousWriter = writer;
+            setWriter(output);
+            emitShebangIfNeeded(bundle);
+            emitPrologueDirectivesIfNeeded(bundle);
+            emitHelpersIndirect(bundle);
+            for (var _a = 0, _b = bundle.sourceFiles; _a < _b.length; _a++) {
+                var sourceFile = _b[_a];
+                print(0 /* SourceFile */, sourceFile, sourceFile);
+            }
+            reset();
+            writer = previousWriter;
+        }
+        function writeFile(sourceFile, output) {
+            var previousWriter = writer;
+            setWriter(output);
+            emitShebangIfNeeded(sourceFile);
+            emitPrologueDirectivesIfNeeded(sourceFile);
+            print(0 /* SourceFile */, sourceFile, sourceFile);
+            reset();
+            writer = previousWriter;
+        }
+        function beginPrint() {
+            return ownWriter || (ownWriter = ts.createTextWriter(newLine));
+        }
+        function endPrint() {
+            var text = ownWriter.getText();
+            ownWriter.reset();
+            return text;
+        }
+        function print(hint, node, sourceFile) {
+            if (sourceFile) {
+                setSourceFile(sourceFile);
+            }
+            pipelineEmitWithNotification(hint, node);
+        }
+        function setSourceFile(sourceFile) {
+            currentSourceFile = sourceFile;
+            comments.setSourceFile(sourceFile);
+            if (onSetSourceFile) {
+                onSetSourceFile(sourceFile);
+            }
+        }
+        function setWriter(output) {
+            writer = output;
+            comments.setWriter(output);
+        }
+        function reset() {
+            nodeIdToGeneratedName = [];
+            autoGeneratedIdToGeneratedName = [];
+            generatedNames = ts.createMap();
+            tempFlagsStack = [];
+            tempFlags = 0 /* Auto */;
+            comments.reset();
+            setWriter(/*output*/ undefined);
+        }
         function emit(node) {
             pipelineEmitWithNotification(3 /* Unspecified */, node);
         }
-        /**
-         * Emits an IdentifierName.
-         */
         function emitIdentifierName(node) {
             pipelineEmitWithNotification(2 /* IdentifierName */, node);
         }
-        /**
-         * Emits an expression node.
-         */
         function emitExpression(node) {
             pipelineEmitWithNotification(1 /* Expression */, node);
         }
-        /**
-         * Emits a node with possible notification.
-         *
-         * NOTE: Do not call this method directly. It is part of the emit pipeline
-         * and should only be called from printSourceFile, emit, emitExpression, or
-         * emitIdentifierName.
-         */
-        function pipelineEmitWithNotification(emitContext, node) {
-            emitNodeWithNotification(emitContext, node, pipelineEmitWithComments);
-        }
-        /**
-         * Emits a node with comments.
-         *
-         * NOTE: Do not call this method directly. It is part of the emit pipeline
-         * and should only be called indirectly from pipelineEmitWithNotification.
-         */
-        function pipelineEmitWithComments(emitContext, node) {
-            // Do not emit comments for SourceFile
-            if (emitContext === 0 /* SourceFile */) {
-                pipelineEmitWithSourceMap(emitContext, node);
-                return;
+        function pipelineEmitWithNotification(hint, node) {
+            if (onEmitNode) {
+                onEmitNode(hint, node, pipelineEmitWithComments);
             }
-            emitNodeWithComments(emitContext, node, pipelineEmitWithSourceMap);
-        }
-        /**
-         * Emits a node with source maps.
-         *
-         * NOTE: Do not call this method directly. It is part of the emit pipeline
-         * and should only be called indirectly from pipelineEmitWithComments.
-         */
-        function pipelineEmitWithSourceMap(emitContext, node) {
-            // Do not emit source mappings for SourceFile or IdentifierName
-            if (emitContext === 0 /* SourceFile */
-                || emitContext === 2 /* IdentifierName */) {
-                pipelineEmitWithSubstitution(emitContext, node);
-                return;
+            else {
+                pipelineEmitWithComments(hint, node);
             }
-            emitNodeWithSourceMap(emitContext, node, pipelineEmitWithSubstitution);
-        }
-        /**
-         * Emits a node with possible substitution.
-         *
-         * NOTE: Do not call this method directly. It is part of the emit pipeline
-         * and should only be called indirectly from pipelineEmitWithSourceMap or
-         * pipelineEmitInUnspecifiedContext (when picking a more specific context).
-         */
-        function pipelineEmitWithSubstitution(emitContext, node) {
-            emitNodeWithSubstitution(emitContext, node, pipelineEmitForContext);
         }
-        /**
-         * Emits a node.
-         *
-         * NOTE: Do not call this method directly. It is part of the emit pipeline
-         * and should only be called indirectly from pipelineEmitWithSubstitution.
-         */
-        function pipelineEmitForContext(emitContext, node) {
-            switch (emitContext) {
-                case 0 /* SourceFile */: return pipelineEmitInSourceFileContext(node);
-                case 2 /* IdentifierName */: return pipelineEmitInIdentifierNameContext(node);
-                case 3 /* Unspecified */: return pipelineEmitInUnspecifiedContext(node);
-                case 1 /* Expression */: return pipelineEmitInExpressionContext(node);
+        function pipelineEmitWithComments(hint, node) {
+            node = trySubstituteNode(hint, node);
+            if (emitNodeWithComments && hint !== 0 /* SourceFile */) {
+                emitNodeWithComments(hint, node, pipelineEmitWithSourceMap);
+            }
+            else {
+                pipelineEmitWithSourceMap(hint, node);
             }
         }
-        /**
-         * Emits a node in the SourceFile EmitContext.
-         *
-         * NOTE: Do not call this method directly. It is part of the emit pipeline
-         * and should only be called indirectly from pipelineEmitForContext.
-         */
-        function pipelineEmitInSourceFileContext(node) {
-            var kind = node.kind;
-            switch (kind) {
-                // Top-level nodes
-                case 256 /* SourceFile */:
-                    return emitSourceFile(node);
+        function pipelineEmitWithSourceMap(hint, node) {
+            if (onEmitSourceMapOfNode && hint !== 0 /* SourceFile */ && hint !== 2 /* IdentifierName */) {
+                onEmitSourceMapOfNode(hint, node, pipelineEmitWithHint);
+            }
+            else {
+                pipelineEmitWithHint(hint, node);
             }
         }
-        /**
-         * Emits a node in the IdentifierName EmitContext.
-         *
-         * NOTE: Do not call this method directly. It is part of the emit pipeline
-         * and should only be called indirectly from pipelineEmitForContext.
-         */
-        function pipelineEmitInIdentifierNameContext(node) {
-            var kind = node.kind;
-            switch (kind) {
-                // Identifiers
-                case 69 /* Identifier */:
-                    return emitIdentifier(node);
+        function pipelineEmitWithHint(hint, node) {
+            switch (hint) {
+                case 0 /* SourceFile */: return pipelineEmitSourceFile(node);
+                case 2 /* IdentifierName */: return pipelineEmitIdentifierName(node);
+                case 1 /* Expression */: return pipelineEmitExpression(node);
+                case 3 /* Unspecified */: return pipelineEmitUnspecified(node);
             }
         }
-        /**
-         * Emits a node in the Unspecified EmitContext.
-         *
-         * NOTE: Do not call this method directly. It is part of the emit pipeline
-         * and should only be called indirectly from pipelineEmitForContext.
-         */
-        function pipelineEmitInUnspecifiedContext(node) {
+        function pipelineEmitSourceFile(node) {
+            ts.Debug.assertNode(node, ts.isSourceFile);
+            emitSourceFile(node);
+        }
+        function pipelineEmitIdentifierName(node) {
+            ts.Debug.assertNode(node, ts.isIdentifier);
+            emitIdentifier(node);
+        }
+        function pipelineEmitUnspecified(node) {
             var kind = node.kind;
+            // Reserved words
+            // Strict mode reserved words
+            // Contextual keywords
+            if (ts.isKeyword(kind)) {
+                writeTokenNode(node);
+                return;
+            }
             switch (kind) {
                 // Pseudo-literals
-                case 12 /* TemplateHead */:
-                case 13 /* TemplateMiddle */:
-                case 14 /* TemplateTail */:
+                case 14 /* TemplateHead */:
+                case 15 /* TemplateMiddle */:
+                case 16 /* TemplateTail */:
                     return emitLiteral(node);
                 // Identifiers
-                case 69 /* Identifier */:
+                case 71 /* Identifier */:
                     return emitIdentifier(node);
-                // Reserved words
-                case 74 /* ConstKeyword */:
-                case 77 /* DefaultKeyword */:
-                case 82 /* ExportKeyword */:
-                case 103 /* VoidKeyword */:
-                // Strict mode reserved words
-                case 110 /* PrivateKeyword */:
-                case 111 /* ProtectedKeyword */:
-                case 112 /* PublicKeyword */:
-                case 113 /* StaticKeyword */:
-                // Contextual keywords
-                case 115 /* AbstractKeyword */:
-                case 117 /* AnyKeyword */:
-                case 118 /* AsyncKeyword */:
-                case 120 /* BooleanKeyword */:
-                case 122 /* DeclareKeyword */:
-                case 130 /* NumberKeyword */:
-                case 128 /* ReadonlyKeyword */:
-                case 132 /* StringKeyword */:
-                case 133 /* SymbolKeyword */:
-                case 137 /* GlobalKeyword */:
-                    writeTokenText(kind);
-                    return;
                 // Parse tree nodes
                 // Names
-                case 139 /* QualifiedName */:
+                case 143 /* QualifiedName */:
                     return emitQualifiedName(node);
-                case 140 /* ComputedPropertyName */:
+                case 144 /* ComputedPropertyName */:
                     return emitComputedPropertyName(node);
                 // Signature elements
-                case 141 /* TypeParameter */:
+                case 145 /* TypeParameter */:
                     return emitTypeParameter(node);
-                case 142 /* Parameter */:
+                case 146 /* Parameter */:
                     return emitParameter(node);
-                case 143 /* Decorator */:
+                case 147 /* Decorator */:
                     return emitDecorator(node);
                 // Type members
-                case 144 /* PropertySignature */:
+                case 148 /* PropertySignature */:
                     return emitPropertySignature(node);
-                case 145 /* PropertyDeclaration */:
+                case 149 /* PropertyDeclaration */:
                     return emitPropertyDeclaration(node);
-                case 146 /* MethodSignature */:
+                case 150 /* MethodSignature */:
                     return emitMethodSignature(node);
-                case 147 /* MethodDeclaration */:
+                case 151 /* MethodDeclaration */:
                     return emitMethodDeclaration(node);
-                case 148 /* Constructor */:
+                case 152 /* Constructor */:
                     return emitConstructor(node);
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
+                case 153 /* GetAccessor */:
+                case 154 /* SetAccessor */:
                     return emitAccessorDeclaration(node);
-                case 151 /* CallSignature */:
+                case 155 /* CallSignature */:
                     return emitCallSignature(node);
-                case 152 /* ConstructSignature */:
+                case 156 /* ConstructSignature */:
                     return emitConstructSignature(node);
-                case 153 /* IndexSignature */:
+                case 157 /* IndexSignature */:
                     return emitIndexSignature(node);
                 // Types
-                case 154 /* TypePredicate */:
+                case 158 /* TypePredicate */:
                     return emitTypePredicate(node);
-                case 155 /* TypeReference */:
+                case 159 /* TypeReference */:
                     return emitTypeReference(node);
-                case 156 /* FunctionType */:
+                case 160 /* FunctionType */:
                     return emitFunctionType(node);
-                case 157 /* ConstructorType */:
+                case 161 /* ConstructorType */:
                     return emitConstructorType(node);
-                case 158 /* TypeQuery */:
+                case 162 /* TypeQuery */:
                     return emitTypeQuery(node);
-                case 159 /* TypeLiteral */:
+                case 163 /* TypeLiteral */:
                     return emitTypeLiteral(node);
-                case 160 /* ArrayType */:
+                case 164 /* ArrayType */:
                     return emitArrayType(node);
-                case 161 /* TupleType */:
+                case 165 /* TupleType */:
                     return emitTupleType(node);
-                case 162 /* UnionType */:
+                case 166 /* UnionType */:
                     return emitUnionType(node);
-                case 163 /* IntersectionType */:
+                case 167 /* IntersectionType */:
                     return emitIntersectionType(node);
-                case 164 /* ParenthesizedType */:
+                case 168 /* ParenthesizedType */:
                     return emitParenthesizedType(node);
-                case 194 /* ExpressionWithTypeArguments */:
+                case 201 /* ExpressionWithTypeArguments */:
                     return emitExpressionWithTypeArguments(node);
-                case 165 /* ThisType */:
-                    return emitThisType(node);
-                case 166 /* LiteralType */:
+                case 169 /* ThisType */:
+                    return emitThisType();
+                case 170 /* TypeOperator */:
+                    return emitTypeOperator(node);
+                case 171 /* IndexedAccessType */:
+                    return emitIndexedAccessType(node);
+                case 172 /* MappedType */:
+                    return emitMappedType(node);
+                case 173 /* LiteralType */:
                     return emitLiteralType(node);
                 // Binding patterns
-                case 167 /* ObjectBindingPattern */:
+                case 174 /* ObjectBindingPattern */:
                     return emitObjectBindingPattern(node);
-                case 168 /* ArrayBindingPattern */:
+                case 175 /* ArrayBindingPattern */:
                     return emitArrayBindingPattern(node);
-                case 169 /* BindingElement */:
+                case 176 /* BindingElement */:
                     return emitBindingElement(node);
                 // Misc
-                case 197 /* TemplateSpan */:
+                case 205 /* TemplateSpan */:
                     return emitTemplateSpan(node);
-                case 198 /* SemicolonClassElement */:
-                    return emitSemicolonClassElement(node);
+                case 206 /* SemicolonClassElement */:
+                    return emitSemicolonClassElement();
                 // Statements
-                case 199 /* Block */:
+                case 207 /* Block */:
                     return emitBlock(node);
-                case 200 /* VariableStatement */:
+                case 208 /* VariableStatement */:
                     return emitVariableStatement(node);
-                case 201 /* EmptyStatement */:
-                    return emitEmptyStatement(node);
-                case 202 /* ExpressionStatement */:
+                case 209 /* EmptyStatement */:
+                    return emitEmptyStatement();
+                case 210 /* ExpressionStatement */:
                     return emitExpressionStatement(node);
-                case 203 /* IfStatement */:
+                case 211 /* IfStatement */:
                     return emitIfStatement(node);
-                case 204 /* DoStatement */:
+                case 212 /* DoStatement */:
                     return emitDoStatement(node);
-                case 205 /* WhileStatement */:
+                case 213 /* WhileStatement */:
                     return emitWhileStatement(node);
-                case 206 /* ForStatement */:
+                case 214 /* ForStatement */:
                     return emitForStatement(node);
-                case 207 /* ForInStatement */:
+                case 215 /* ForInStatement */:
                     return emitForInStatement(node);
-                case 208 /* ForOfStatement */:
+                case 216 /* ForOfStatement */:
                     return emitForOfStatement(node);
-                case 209 /* ContinueStatement */:
+                case 217 /* ContinueStatement */:
                     return emitContinueStatement(node);
-                case 210 /* BreakStatement */:
+                case 218 /* BreakStatement */:
                     return emitBreakStatement(node);
-                case 211 /* ReturnStatement */:
+                case 219 /* ReturnStatement */:
                     return emitReturnStatement(node);
-                case 212 /* WithStatement */:
+                case 220 /* WithStatement */:
                     return emitWithStatement(node);
-                case 213 /* SwitchStatement */:
+                case 221 /* SwitchStatement */:
                     return emitSwitchStatement(node);
-                case 214 /* LabeledStatement */:
+                case 222 /* LabeledStatement */:
                     return emitLabeledStatement(node);
-                case 215 /* ThrowStatement */:
+                case 223 /* ThrowStatement */:
                     return emitThrowStatement(node);
-                case 216 /* TryStatement */:
+                case 224 /* TryStatement */:
                     return emitTryStatement(node);
-                case 217 /* DebuggerStatement */:
+                case 225 /* DebuggerStatement */:
                     return emitDebuggerStatement(node);
                 // Declarations
-                case 218 /* VariableDeclaration */:
+                case 226 /* VariableDeclaration */:
                     return emitVariableDeclaration(node);
-                case 219 /* VariableDeclarationList */:
+                case 227 /* VariableDeclarationList */:
                     return emitVariableDeclarationList(node);
-                case 220 /* FunctionDeclaration */:
+                case 228 /* FunctionDeclaration */:
                     return emitFunctionDeclaration(node);
-                case 221 /* ClassDeclaration */:
+                case 229 /* ClassDeclaration */:
                     return emitClassDeclaration(node);
-                case 222 /* InterfaceDeclaration */:
+                case 230 /* InterfaceDeclaration */:
                     return emitInterfaceDeclaration(node);
-                case 223 /* TypeAliasDeclaration */:
+                case 231 /* TypeAliasDeclaration */:
                     return emitTypeAliasDeclaration(node);
-                case 224 /* EnumDeclaration */:
+                case 232 /* EnumDeclaration */:
                     return emitEnumDeclaration(node);
-                case 225 /* ModuleDeclaration */:
+                case 233 /* ModuleDeclaration */:
                     return emitModuleDeclaration(node);
-                case 226 /* ModuleBlock */:
+                case 234 /* ModuleBlock */:
                     return emitModuleBlock(node);
-                case 227 /* CaseBlock */:
+                case 235 /* CaseBlock */:
                     return emitCaseBlock(node);
-                case 229 /* ImportEqualsDeclaration */:
+                case 236 /* NamespaceExportDeclaration */:
+                    return emitNamespaceExportDeclaration(node);
+                case 237 /* ImportEqualsDeclaration */:
                     return emitImportEqualsDeclaration(node);
-                case 230 /* ImportDeclaration */:
+                case 238 /* ImportDeclaration */:
                     return emitImportDeclaration(node);
-                case 231 /* ImportClause */:
+                case 239 /* ImportClause */:
                     return emitImportClause(node);
-                case 232 /* NamespaceImport */:
+                case 240 /* NamespaceImport */:
                     return emitNamespaceImport(node);
-                case 233 /* NamedImports */:
+                case 241 /* NamedImports */:
                     return emitNamedImports(node);
-                case 234 /* ImportSpecifier */:
+                case 242 /* ImportSpecifier */:
                     return emitImportSpecifier(node);
-                case 235 /* ExportAssignment */:
+                case 243 /* ExportAssignment */:
                     return emitExportAssignment(node);
-                case 236 /* ExportDeclaration */:
+                case 244 /* ExportDeclaration */:
                     return emitExportDeclaration(node);
-                case 237 /* NamedExports */:
+                case 245 /* NamedExports */:
                     return emitNamedExports(node);
-                case 238 /* ExportSpecifier */:
+                case 246 /* ExportSpecifier */:
                     return emitExportSpecifier(node);
-                case 239 /* MissingDeclaration */:
+                case 247 /* MissingDeclaration */:
                     return;
                 // Module references
-                case 240 /* ExternalModuleReference */:
+                case 248 /* ExternalModuleReference */:
                     return emitExternalModuleReference(node);
                 // JSX (non-expression)
-                case 244 /* JsxText */:
+                case 10 /* JsxText */:
                     return emitJsxText(node);
-                case 243 /* JsxOpeningElement */:
+                case 251 /* JsxOpeningElement */:
                     return emitJsxOpeningElement(node);
-                case 245 /* JsxClosingElement */:
+                case 252 /* JsxClosingElement */:
                     return emitJsxClosingElement(node);
-                case 246 /* JsxAttribute */:
+                case 253 /* JsxAttribute */:
                     return emitJsxAttribute(node);
-                case 247 /* JsxSpreadAttribute */:
+                case 254 /* JsxAttributes */:
+                    return emitJsxAttributes(node);
+                case 255 /* JsxSpreadAttribute */:
                     return emitJsxSpreadAttribute(node);
-                case 248 /* JsxExpression */:
+                case 256 /* JsxExpression */:
                     return emitJsxExpression(node);
                 // Clauses
-                case 249 /* CaseClause */:
+                case 257 /* CaseClause */:
                     return emitCaseClause(node);
-                case 250 /* DefaultClause */:
+                case 258 /* DefaultClause */:
                     return emitDefaultClause(node);
-                case 251 /* HeritageClause */:
+                case 259 /* HeritageClause */:
                     return emitHeritageClause(node);
-                case 252 /* CatchClause */:
+                case 260 /* CatchClause */:
                     return emitCatchClause(node);
                 // Property assignments
-                case 253 /* PropertyAssignment */:
+                case 261 /* PropertyAssignment */:
                     return emitPropertyAssignment(node);
-                case 254 /* ShorthandPropertyAssignment */:
+                case 262 /* ShorthandPropertyAssignment */:
                     return emitShorthandPropertyAssignment(node);
+                case 263 /* SpreadAssignment */:
+                    return emitSpreadAssignment(node);
                 // Enum
-                case 255 /* EnumMember */:
+                case 264 /* EnumMember */:
                     return emitEnumMember(node);
             }
             // If the node is an expression, try to emit it as an expression with
             // substitution.
             if (ts.isExpression(node)) {
-                return pipelineEmitWithSubstitution(1 /* Expression */, node);
+                return pipelineEmitExpression(trySubstituteNode(1 /* Expression */, node));
+            }
+            if (ts.isToken(node)) {
+                writeTokenNode(node);
+                return;
             }
         }
-        /**
-         * Emits a node in the Expression EmitContext.
-         *
-         * NOTE: Do not call this method directly. It is part of the emit pipeline
-         * and should only be called indirectly from pipelineEmitForContext.
-         */
-        function pipelineEmitInExpressionContext(node) {
+        function pipelineEmitExpression(node) {
             var kind = node.kind;
             switch (kind) {
                 // Literals
                 case 8 /* NumericLiteral */:
                     return emitNumericLiteral(node);
                 case 9 /* StringLiteral */:
-                case 10 /* RegularExpressionLiteral */:
-                case 11 /* NoSubstitutionTemplateLiteral */:
+                case 12 /* RegularExpressionLiteral */:
+                case 13 /* NoSubstitutionTemplateLiteral */:
                     return emitLiteral(node);
                 // Identifiers
-                case 69 /* Identifier */:
+                case 71 /* Identifier */:
                     return emitIdentifier(node);
                 // Reserved words
-                case 84 /* FalseKeyword */:
-                case 93 /* NullKeyword */:
-                case 95 /* SuperKeyword */:
-                case 99 /* TrueKeyword */:
-                case 97 /* ThisKeyword */:
-                    writeTokenText(kind);
+                case 86 /* FalseKeyword */:
+                case 95 /* NullKeyword */:
+                case 97 /* SuperKeyword */:
+                case 101 /* TrueKeyword */:
+                case 99 /* ThisKeyword */:
+                case 91 /* ImportKeyword */:
+                    writeTokenNode(node);
                     return;
                 // Expressions
-                case 170 /* ArrayLiteralExpression */:
+                case 177 /* ArrayLiteralExpression */:
                     return emitArrayLiteralExpression(node);
-                case 171 /* ObjectLiteralExpression */:
+                case 178 /* ObjectLiteralExpression */:
                     return emitObjectLiteralExpression(node);
-                case 172 /* PropertyAccessExpression */:
+                case 179 /* PropertyAccessExpression */:
                     return emitPropertyAccessExpression(node);
-                case 173 /* ElementAccessExpression */:
+                case 180 /* ElementAccessExpression */:
                     return emitElementAccessExpression(node);
-                case 174 /* CallExpression */:
+                case 181 /* CallExpression */:
                     return emitCallExpression(node);
-                case 175 /* NewExpression */:
+                case 182 /* NewExpression */:
                     return emitNewExpression(node);
-                case 176 /* TaggedTemplateExpression */:
+                case 183 /* TaggedTemplateExpression */:
                     return emitTaggedTemplateExpression(node);
-                case 177 /* TypeAssertionExpression */:
+                case 184 /* TypeAssertionExpression */:
                     return emitTypeAssertionExpression(node);
-                case 178 /* ParenthesizedExpression */:
+                case 185 /* ParenthesizedExpression */:
                     return emitParenthesizedExpression(node);
-                case 179 /* FunctionExpression */:
+                case 186 /* FunctionExpression */:
                     return emitFunctionExpression(node);
-                case 180 /* ArrowFunction */:
+                case 187 /* ArrowFunction */:
                     return emitArrowFunction(node);
-                case 181 /* DeleteExpression */:
+                case 188 /* DeleteExpression */:
                     return emitDeleteExpression(node);
-                case 182 /* TypeOfExpression */:
+                case 189 /* TypeOfExpression */:
                     return emitTypeOfExpression(node);
-                case 183 /* VoidExpression */:
+                case 190 /* VoidExpression */:
                     return emitVoidExpression(node);
-                case 184 /* AwaitExpression */:
+                case 191 /* AwaitExpression */:
                     return emitAwaitExpression(node);
-                case 185 /* PrefixUnaryExpression */:
+                case 192 /* PrefixUnaryExpression */:
                     return emitPrefixUnaryExpression(node);
-                case 186 /* PostfixUnaryExpression */:
+                case 193 /* PostfixUnaryExpression */:
                     return emitPostfixUnaryExpression(node);
-                case 187 /* BinaryExpression */:
+                case 194 /* BinaryExpression */:
                     return emitBinaryExpression(node);
-                case 188 /* ConditionalExpression */:
+                case 195 /* ConditionalExpression */:
                     return emitConditionalExpression(node);
-                case 189 /* TemplateExpression */:
+                case 196 /* TemplateExpression */:
                     return emitTemplateExpression(node);
-                case 190 /* YieldExpression */:
+                case 197 /* YieldExpression */:
                     return emitYieldExpression(node);
-                case 191 /* SpreadElementExpression */:
-                    return emitSpreadElementExpression(node);
-                case 192 /* ClassExpression */:
+                case 198 /* SpreadElement */:
+                    return emitSpreadExpression(node);
+                case 199 /* ClassExpression */:
                     return emitClassExpression(node);
-                case 193 /* OmittedExpression */:
+                case 200 /* OmittedExpression */:
                     return;
-                case 195 /* AsExpression */:
+                case 202 /* AsExpression */:
                     return emitAsExpression(node);
-                case 196 /* NonNullExpression */:
+                case 203 /* NonNullExpression */:
                     return emitNonNullExpression(node);
+                case 204 /* MetaProperty */:
+                    return emitMetaProperty(node);
                 // JSX
-                case 241 /* JsxElement */:
+                case 249 /* JsxElement */:
                     return emitJsxElement(node);
-                case 242 /* JsxSelfClosingElement */:
+                case 250 /* JsxSelfClosingElement */:
                     return emitJsxSelfClosingElement(node);
                 // Transformation nodes
-                case 288 /* PartiallyEmittedExpression */:
+                case 297 /* PartiallyEmittedExpression */:
                     return emitPartiallyEmittedExpression(node);
+                case 298 /* CommaListExpression */:
+                    return emitCommaList(node);
+            }
+        }
+        function trySubstituteNode(hint, node) {
+            return node && substituteNode && substituteNode(hint, node) || node;
+        }
+        function emitHelpersIndirect(node) {
+            if (onEmitHelpers) {
+                onEmitHelpers(node, writeLines);
             }
         }
         //
@@ -57199,9 +68912,6 @@ var ts;
         // SyntaxKind.NumericLiteral
         function emitNumericLiteral(node) {
             emitLiteral(node);
-            if (node.trailingComment) {
-                write(" /*" + node.trailingComment + "*/");
-            }
         }
         // SyntaxKind.StringLiteral
         // SyntaxKind.RegularExpressionLiteral
@@ -57211,7 +68921,7 @@ var ts;
         // SyntaxKind.TemplateTail
         function emitLiteral(node) {
             var text = getLiteralTextOfNode(node);
-            if ((compilerOptions.sourceMap || compilerOptions.inlineSourceMap)
+            if ((printerOptions.sourceMap || printerOptions.inlineSourceMap)
                 && (node.kind === 9 /* StringLiteral */ || ts.isTemplateLiteralKind(node.kind))) {
                 writer.writeLiteral(text);
             }
@@ -57223,12 +68933,8 @@ var ts;
         // Identifiers
         //
         function emitIdentifier(node) {
-            if (ts.getEmitFlags(node) & 16 /* UMDDefine */) {
-                writeLines(umdHelper);
-            }
-            else {
-                write(getTextOfNode(node, /*includeTrivia*/ false));
-            }
+            write(getTextOfNode(node, /*includeTrivia*/ false));
+            emitTypeArguments(node, node.typeArguments);
         }
         //
         // Names
@@ -57239,7 +68945,7 @@ var ts;
             emit(node.right);
         }
         function emitEntityName(node) {
-            if (node.kind === 69 /* Identifier */) {
+            if (node.kind === 71 /* Identifier */) {
                 emitExpression(node);
             }
             else {
@@ -57257,6 +68963,7 @@ var ts;
         function emitTypeParameter(node) {
             emit(node.name);
             emitWithPrefix(" extends ", node.constraint);
+            emitWithPrefix(" = ", node.default);
         }
         function emitParameter(node) {
             emitDecorators(node, node.decorators);
@@ -57264,8 +68971,8 @@ var ts;
             writeIfPresent(node.dotDotDotToken, "...");
             emit(node.name);
             writeIfPresent(node.questionToken, "?");
-            emitExpressionWithPrefix(" = ", node.initializer);
             emitWithPrefix(": ", node.type);
+            emitExpressionWithPrefix(" = ", node.initializer);
         }
         function emitDecorator(decorator) {
             write("@");
@@ -57286,6 +68993,7 @@ var ts;
             emitDecorators(node, node.decorators);
             emitModifiers(node, node.modifiers);
             emit(node.name);
+            writeIfPresent(node.questionToken, "?");
             emitWithPrefix(": ", node.type);
             emitExpressionWithPrefix(" = ", node.initializer);
             write(";");
@@ -57305,6 +69013,7 @@ var ts;
             emitModifiers(node, node.modifiers);
             writeIfPresent(node.asteriskToken, "*");
             emit(node.name);
+            writeIfPresent(node.questionToken, "?");
             emitSignatureAndBody(node, emitSignatureHead);
         }
         function emitConstructor(node) {
@@ -57315,7 +69024,7 @@ var ts;
         function emitAccessorDeclaration(node) {
             emitDecorators(node, node.decorators);
             emitModifiers(node, node.modifiers);
-            write(node.kind === 149 /* GetAccessor */ ? "get " : "set ");
+            write(node.kind === 153 /* GetAccessor */ ? "get " : "set ");
             emit(node.name);
             emitSignatureAndBody(node, emitSignatureHead);
         }
@@ -57343,7 +69052,7 @@ var ts;
             emitWithPrefix(": ", node.type);
             write(";");
         }
-        function emitSemicolonClassElement(node) {
+        function emitSemicolonClassElement() {
             write(";");
         }
         //
@@ -57367,7 +69076,7 @@ var ts;
         function emitConstructorType(node) {
             write("new ");
             emitTypeParameters(node, node.typeParameters);
-            emitParametersForArrow(node, node.parameters);
+            emitParameters(node, node.parameters);
             write(" => ");
             emit(node.type);
         }
@@ -57377,7 +69086,10 @@ var ts;
         }
         function emitTypeLiteral(node) {
             write("{");
-            emitList(node, node.members, 65 /* TypeLiteralMembers */);
+            // If the literal is empty, do not add spaces between braces.
+            if (node.members.length > 0) {
+                emitList(node, node.members, ts.getEmitFlags(node) & 1 /* SingleLine */ ? 448 /* SingleLineTypeLiteralMembers */ : 65 /* MultiLineTypeLiteralMembers */);
+            }
             write("}");
         }
         function emitArrayType(node) {
@@ -57400,9 +69112,49 @@ var ts;
             emit(node.type);
             write(")");
         }
-        function emitThisType(node) {
+        function emitThisType() {
             write("this");
         }
+        function emitTypeOperator(node) {
+            writeTokenText(node.operator);
+            write(" ");
+            emit(node.type);
+        }
+        function emitIndexedAccessType(node) {
+            emit(node.objectType);
+            write("[");
+            emit(node.indexType);
+            write("]");
+        }
+        function emitMappedType(node) {
+            var emitFlags = ts.getEmitFlags(node);
+            write("{");
+            if (emitFlags & 1 /* SingleLine */) {
+                write(" ");
+            }
+            else {
+                writeLine();
+                increaseIndent();
+            }
+            writeIfPresent(node.readonlyToken, "readonly ");
+            write("[");
+            emit(node.typeParameter.name);
+            write(" in ");
+            emit(node.typeParameter.constraint);
+            write("]");
+            writeIfPresent(node.questionToken, "?");
+            write(": ");
+            emit(node.type);
+            write(";");
+            if (emitFlags & 1 /* SingleLine */) {
+                write(" ");
+            }
+            else {
+                writeLine();
+                decreaseIndent();
+            }
+            write("}");
+        }
         function emitLiteralType(node) {
             emitExpression(node.literal);
         }
@@ -57456,12 +69208,12 @@ var ts;
                 write("{}");
             }
             else {
-                var indentedFlag = ts.getEmitFlags(node) & 524288 /* Indented */;
+                var indentedFlag = ts.getEmitFlags(node) & 65536 /* Indented */;
                 if (indentedFlag) {
                     increaseIndent();
                 }
                 var preferNewLine = node.multiLine ? 32768 /* PreferNewLine */ : 0 /* None */;
-                var allowTrailingComma = languageVersion >= 1 /* ES5 */ ? 32 /* AllowTrailingComma */ : 0 /* None */;
+                var allowTrailingComma = currentSourceFile.languageVersion >= 1 /* ES5 */ ? 32 /* AllowTrailingComma */ : 0 /* None */;
                 emitList(node, properties, 978 /* ObjectLiteralExpressionProperties */ | allowTrailingComma | preferNewLine);
                 if (indentedFlag) {
                     decreaseIndent();
@@ -57471,10 +69223,10 @@ var ts;
         function emitPropertyAccessExpression(node) {
             var indentBeforeDot = false;
             var indentAfterDot = false;
-            if (!(ts.getEmitFlags(node) & 1048576 /* NoIndentation */)) {
+            if (!(ts.getEmitFlags(node) & 131072 /* NoIndentation */)) {
                 var dotRangeStart = node.expression.end;
-                var dotRangeEnd = ts.skipTrivia(currentText, node.expression.end) + 1;
-                var dotToken = { kind: 21 /* DotToken */, pos: dotRangeStart, end: dotRangeEnd };
+                var dotRangeEnd = ts.skipTrivia(currentSourceFile.text, node.expression.end) + 1;
+                var dotToken = { kind: 23 /* DotToken */, pos: dotRangeStart, end: dotRangeEnd };
                 indentBeforeDot = needsIndentation(node, node.expression, dotToken);
                 indentAfterDot = needsIndentation(node, dotToken, node.name);
             }
@@ -57489,18 +69241,20 @@ var ts;
         // 1..toString is a valid property access, emit a dot after the literal
         // Also emit a dot if expression is a integer const enum value - it will appear in generated code as numeric literal
         function needsDotDotForPropertyAccess(expression) {
-            if (expression.kind === 8 /* NumericLiteral */) {
-                // check if numeric literal was originally written with a dot
+            expression = ts.skipPartiallyEmittedExpressions(expression);
+            if (ts.isNumericLiteral(expression)) {
+                // check if numeric literal is a decimal literal that was originally written with a dot
                 var text = getLiteralTextOfNode(expression);
-                return text.indexOf(ts.tokenToString(21 /* DotToken */)) < 0;
+                return !expression.numericLiteralFlags
+                    && text.indexOf(ts.tokenToString(23 /* DotToken */)) < 0;
             }
             else if (ts.isPropertyAccessExpression(expression) || ts.isElementAccessExpression(expression)) {
                 // check if constant enum value is integer
                 var constantValue = ts.getConstantValue(expression);
                 // isFinite handles cases when constantValue is undefined
-                return isFinite(constantValue)
+                return typeof constantValue === "number" && isFinite(constantValue)
                     && Math.floor(constantValue) === constantValue
-                    && compilerOptions.removeComments;
+                    && printerOptions.removeComments;
             }
         }
         function emitElementAccessExpression(node) {
@@ -57511,11 +69265,13 @@ var ts;
         }
         function emitCallExpression(node) {
             emitExpression(node.expression);
+            emitTypeArguments(node, node.typeArguments);
             emitExpressionList(node, node.arguments, 1296 /* CallExpressionArguments */);
         }
         function emitNewExpression(node) {
             write("new ");
             emitExpression(node.expression);
+            emitTypeArguments(node, node.typeArguments);
             emitExpressionList(node, node.arguments, 9488 /* NewExpressionArguments */);
         }
         function emitTaggedTemplateExpression(node) {
@@ -57524,11 +69280,9 @@ var ts;
             emitExpression(node.template);
         }
         function emitTypeAssertionExpression(node) {
-            if (node.type) {
-                write("<");
-                emit(node.type);
-                write(">");
-            }
+            write("<");
+            emit(node.type);
+            write(">");
             emitExpression(node.expression);
         }
         function emitParenthesizedExpression(node) {
@@ -57587,21 +69341,21 @@ var ts;
             // expression a prefix increment whose operand is a plus expression - (++(+x))
             // The same is true of minus of course.
             var operand = node.operand;
-            return operand.kind === 185 /* PrefixUnaryExpression */
-                && ((node.operator === 35 /* PlusToken */ && (operand.operator === 35 /* PlusToken */ || operand.operator === 41 /* PlusPlusToken */))
-                    || (node.operator === 36 /* MinusToken */ && (operand.operator === 36 /* MinusToken */ || operand.operator === 42 /* MinusMinusToken */)));
+            return operand.kind === 192 /* PrefixUnaryExpression */
+                && ((node.operator === 37 /* PlusToken */ && (operand.operator === 37 /* PlusToken */ || operand.operator === 43 /* PlusPlusToken */))
+                    || (node.operator === 38 /* MinusToken */ && (operand.operator === 38 /* MinusToken */ || operand.operator === 44 /* MinusMinusToken */)));
         }
         function emitPostfixUnaryExpression(node) {
             emitExpression(node.operand);
             writeTokenText(node.operator);
         }
         function emitBinaryExpression(node) {
-            var isCommaOperator = node.operatorToken.kind !== 24 /* CommaToken */;
+            var isCommaOperator = node.operatorToken.kind !== 26 /* CommaToken */;
             var indentBeforeOperator = needsIndentation(node, node.left, node.operatorToken);
             var indentAfterOperator = needsIndentation(node, node.operatorToken, node.right);
             emitExpression(node.left);
             increaseIndentIf(indentBeforeOperator, isCommaOperator ? " " : undefined);
-            writeTokenText(node.operatorToken.kind);
+            writeTokenNode(node.operatorToken);
             increaseIndentIf(indentAfterOperator, " ");
             emitExpression(node.right);
             decreaseIndentIf(indentBeforeOperator, indentAfterOperator);
@@ -57631,7 +69385,7 @@ var ts;
             write(node.asteriskToken ? "yield*" : "yield");
             emitExpressionWithPrefix(" ", node.expression);
         }
-        function emitSpreadElementExpression(node) {
+        function emitSpreadExpression(node) {
             write("...");
             emitExpression(node.expression);
         }
@@ -57653,6 +69407,11 @@ var ts;
             emitExpression(node.expression);
             write("!");
         }
+        function emitMetaProperty(node) {
+            writeToken(node.keywordToken, node.pos);
+            write(".");
+            emit(node.name);
+        }
         //
         // Misc
         //
@@ -57663,20 +69422,24 @@ var ts;
         //
         // Statements
         //
-        function emitBlock(node, format) {
+        function emitBlock(node) {
             if (isSingleLineEmptyBlock(node)) {
-                writeToken(15 /* OpenBraceToken */, node.pos, /*contextNode*/ node);
+                writeToken(17 /* OpenBraceToken */, node.pos, /*contextNode*/ node);
                 write(" ");
-                writeToken(16 /* CloseBraceToken */, node.statements.end, /*contextNode*/ node);
+                writeToken(18 /* CloseBraceToken */, node.statements.end, /*contextNode*/ node);
             }
             else {
-                writeToken(15 /* OpenBraceToken */, node.pos, /*contextNode*/ node);
+                writeToken(17 /* OpenBraceToken */, node.pos, /*contextNode*/ node);
                 emitBlockStatements(node);
-                writeToken(16 /* CloseBraceToken */, node.statements.end, /*contextNode*/ node);
+                // We have to call emitLeadingComments explicitly here because otherwise leading comments of the close brace token will not be emitted
+                increaseIndent();
+                emitLeadingCommentsOfPosition(node.statements.end);
+                decreaseIndent();
+                writeToken(18 /* CloseBraceToken */, node.statements.end, /*contextNode*/ node);
             }
         }
         function emitBlockStatements(node) {
-            if (ts.getEmitFlags(node) & 32 /* SingleLine */) {
+            if (ts.getEmitFlags(node) & 1 /* SingleLine */) {
                 emitList(node, node.statements, 384 /* SingleLineBlockStatements */);
             }
             else {
@@ -57688,7 +69451,7 @@ var ts;
             emit(node.declarationList);
             write(";");
         }
-        function emitEmptyStatement(node) {
+        function emitEmptyStatement() {
             write(";");
         }
         function emitExpressionStatement(node) {
@@ -57696,32 +69459,32 @@ var ts;
             write(";");
         }
         function emitIfStatement(node) {
-            var openParenPos = writeToken(88 /* IfKeyword */, node.pos, node);
+            var openParenPos = writeToken(90 /* IfKeyword */, node.pos, node);
             write(" ");
-            writeToken(17 /* OpenParenToken */, openParenPos, node);
+            writeToken(19 /* OpenParenToken */, openParenPos, node);
             emitExpression(node.expression);
-            writeToken(18 /* CloseParenToken */, node.expression.end, node);
-            emitEmbeddedStatement(node.thenStatement);
+            writeToken(20 /* CloseParenToken */, node.expression.end, node);
+            emitEmbeddedStatement(node, node.thenStatement);
             if (node.elseStatement) {
-                writeLine();
-                writeToken(80 /* ElseKeyword */, node.thenStatement.end, node);
-                if (node.elseStatement.kind === 203 /* IfStatement */) {
+                writeLineOrSpace(node);
+                writeToken(82 /* ElseKeyword */, node.thenStatement.end, node);
+                if (node.elseStatement.kind === 211 /* IfStatement */) {
                     write(" ");
                     emit(node.elseStatement);
                 }
                 else {
-                    emitEmbeddedStatement(node.elseStatement);
+                    emitEmbeddedStatement(node, node.elseStatement);
                 }
             }
         }
         function emitDoStatement(node) {
             write("do");
-            emitEmbeddedStatement(node.statement);
+            emitEmbeddedStatement(node, node.statement);
             if (ts.isBlock(node.statement)) {
                 write(" ");
             }
             else {
-                writeLine();
+                writeLineOrSpace(node);
             }
             write("while (");
             emitExpression(node.expression);
@@ -57731,43 +69494,44 @@ var ts;
             write("while (");
             emitExpression(node.expression);
             write(")");
-            emitEmbeddedStatement(node.statement);
+            emitEmbeddedStatement(node, node.statement);
         }
         function emitForStatement(node) {
-            var openParenPos = writeToken(86 /* ForKeyword */, node.pos);
+            var openParenPos = writeToken(88 /* ForKeyword */, node.pos);
             write(" ");
-            writeToken(17 /* OpenParenToken */, openParenPos, /*contextNode*/ node);
+            writeToken(19 /* OpenParenToken */, openParenPos, /*contextNode*/ node);
             emitForBinding(node.initializer);
             write(";");
             emitExpressionWithPrefix(" ", node.condition);
             write(";");
             emitExpressionWithPrefix(" ", node.incrementor);
             write(")");
-            emitEmbeddedStatement(node.statement);
+            emitEmbeddedStatement(node, node.statement);
         }
         function emitForInStatement(node) {
-            var openParenPos = writeToken(86 /* ForKeyword */, node.pos);
+            var openParenPos = writeToken(88 /* ForKeyword */, node.pos);
             write(" ");
-            writeToken(17 /* OpenParenToken */, openParenPos);
+            writeToken(19 /* OpenParenToken */, openParenPos);
             emitForBinding(node.initializer);
             write(" in ");
             emitExpression(node.expression);
-            writeToken(18 /* CloseParenToken */, node.expression.end);
-            emitEmbeddedStatement(node.statement);
+            writeToken(20 /* CloseParenToken */, node.expression.end);
+            emitEmbeddedStatement(node, node.statement);
         }
         function emitForOfStatement(node) {
-            var openParenPos = writeToken(86 /* ForKeyword */, node.pos);
+            var openParenPos = writeToken(88 /* ForKeyword */, node.pos);
             write(" ");
-            writeToken(17 /* OpenParenToken */, openParenPos);
+            emitWithSuffix(node.awaitModifier, " ");
+            writeToken(19 /* OpenParenToken */, openParenPos);
             emitForBinding(node.initializer);
             write(" of ");
             emitExpression(node.expression);
-            writeToken(18 /* CloseParenToken */, node.expression.end);
-            emitEmbeddedStatement(node.statement);
+            writeToken(20 /* CloseParenToken */, node.expression.end);
+            emitEmbeddedStatement(node, node.statement);
         }
         function emitForBinding(node) {
             if (node !== undefined) {
-                if (node.kind === 219 /* VariableDeclarationList */) {
+                if (node.kind === 227 /* VariableDeclarationList */) {
                     emit(node);
                 }
                 else {
@@ -57776,17 +69540,17 @@ var ts;
             }
         }
         function emitContinueStatement(node) {
-            writeToken(75 /* ContinueKeyword */, node.pos);
+            writeToken(77 /* ContinueKeyword */, node.pos);
             emitWithPrefix(" ", node.label);
             write(";");
         }
         function emitBreakStatement(node) {
-            writeToken(70 /* BreakKeyword */, node.pos);
+            writeToken(72 /* BreakKeyword */, node.pos);
             emitWithPrefix(" ", node.label);
             write(";");
         }
         function emitReturnStatement(node) {
-            writeToken(94 /* ReturnKeyword */, node.pos, /*contextNode*/ node);
+            writeToken(96 /* ReturnKeyword */, node.pos, /*contextNode*/ node);
             emitExpressionWithPrefix(" ", node.expression);
             write(";");
         }
@@ -57794,14 +69558,14 @@ var ts;
             write("with (");
             emitExpression(node.expression);
             write(")");
-            emitEmbeddedStatement(node.statement);
+            emitEmbeddedStatement(node, node.statement);
         }
         function emitSwitchStatement(node) {
-            var openParenPos = writeToken(96 /* SwitchKeyword */, node.pos);
+            var openParenPos = writeToken(98 /* SwitchKeyword */, node.pos);
             write(" ");
-            writeToken(17 /* OpenParenToken */, openParenPos);
+            writeToken(19 /* OpenParenToken */, openParenPos);
             emitExpression(node.expression);
-            writeToken(18 /* CloseParenToken */, node.expression.end);
+            writeToken(20 /* CloseParenToken */, node.expression.end);
             write(" ");
             emit(node.caseBlock);
         }
@@ -57818,15 +69582,18 @@ var ts;
         function emitTryStatement(node) {
             write("try ");
             emit(node.tryBlock);
-            emit(node.catchClause);
+            if (node.catchClause) {
+                writeLineOrSpace(node);
+                emit(node.catchClause);
+            }
             if (node.finallyBlock) {
-                writeLine();
+                writeLineOrSpace(node);
                 write("finally ");
                 emit(node.finallyBlock);
             }
         }
         function emitDebuggerStatement(node) {
-            writeToken(76 /* DebuggerKeyword */, node.pos);
+            writeToken(78 /* DebuggerKeyword */, node.pos);
             write(";");
         }
         //
@@ -57834,6 +69601,7 @@ var ts;
         //
         function emitVariableDeclaration(node) {
             emit(node.name);
+            emitWithPrefix(": ", node.type);
             emitExpressionWithPrefix(" = ", node.initializer);
         }
         function emitVariableDeclarationList(node) {
@@ -57850,24 +69618,36 @@ var ts;
             emitIdentifierName(node.name);
             emitSignatureAndBody(node, emitSignatureHead);
         }
+        function emitBlockCallback(_hint, body) {
+            emitBlockFunctionBody(body);
+        }
         function emitSignatureAndBody(node, emitSignatureHead) {
             var body = node.body;
             if (body) {
                 if (ts.isBlock(body)) {
-                    var indentedFlag = ts.getEmitFlags(node) & 524288 /* Indented */;
+                    var indentedFlag = ts.getEmitFlags(node) & 65536 /* Indented */;
                     if (indentedFlag) {
                         increaseIndent();
                     }
-                    if (ts.getEmitFlags(node) & 4194304 /* ReuseTempVariableScope */) {
+                    if (ts.getEmitFlags(node) & 524288 /* ReuseTempVariableScope */) {
                         emitSignatureHead(node);
-                        emitBlockFunctionBody(node, body);
+                        if (onEmitNode) {
+                            onEmitNode(3 /* Unspecified */, body, emitBlockCallback);
+                        }
+                        else {
+                            emitBlockFunctionBody(body);
+                        }
                     }
                     else {
-                        var savedTempFlags = tempFlags;
-                        tempFlags = 0;
+                        pushNameGenerationScope();
                         emitSignatureHead(node);
-                        emitBlockFunctionBody(node, body);
-                        tempFlags = savedTempFlags;
+                        if (onEmitNode) {
+                            onEmitNode(3 /* Unspecified */, body, emitBlockCallback);
+                        }
+                        else {
+                            emitBlockFunctionBody(body);
+                        }
+                        popNameGenerationScope();
                     }
                     if (indentedFlag) {
                         decreaseIndent();
@@ -57889,14 +69669,14 @@ var ts;
             emitParameters(node, node.parameters);
             emitWithPrefix(": ", node.type);
         }
-        function shouldEmitBlockFunctionBodyOnSingleLine(parentNode, body) {
+        function shouldEmitBlockFunctionBodyOnSingleLine(body) {
             // We must emit a function body as a single-line body in the following case:
             // * The body has NodeEmitFlags.SingleLine specified.
             // We must emit a function body as a multi-line body in the following cases:
             // * The body is explicitly marked as multi-line.
             // * A non-synthesized body's start and end position are on different lines.
             // * Any statement in the body starts on a new line.
-            if (ts.getEmitFlags(body) & 32 /* SingleLine */) {
+            if (ts.getEmitFlags(body) & 1 /* SingleLine */) {
                 return true;
             }
             if (body.multiLine) {
@@ -57919,14 +69699,20 @@ var ts;
             }
             return true;
         }
-        function emitBlockFunctionBody(parentNode, body) {
+        function emitBlockFunctionBody(body) {
             write(" {");
             increaseIndent();
-            emitBodyWithDetachedComments(body, body.statements, shouldEmitBlockFunctionBodyOnSingleLine(parentNode, body)
+            var emitBlockFunctionBody = shouldEmitBlockFunctionBodyOnSingleLine(body)
                 ? emitBlockFunctionBodyOnSingleLine
-                : emitBlockFunctionBodyWorker);
+                : emitBlockFunctionBodyWorker;
+            if (emitBodyWithDetachedComments) {
+                emitBodyWithDetachedComments(body, body.statements, emitBlockFunctionBody);
+            }
+            else {
+                emitBlockFunctionBody(body);
+            }
             decreaseIndent();
-            writeToken(16 /* CloseBraceToken */, body.statements.end, body);
+            writeToken(18 /* CloseBraceToken */, body.statements.end, body);
         }
         function emitBlockFunctionBodyOnSingleLine(body) {
             emitBlockFunctionBodyWorker(body, /*emitBlockFunctionBodyOnSingleLine*/ true);
@@ -57934,8 +69720,9 @@ var ts;
         function emitBlockFunctionBodyWorker(body, emitBlockFunctionBodyOnSingleLine) {
             // Emit all the prologue directives (like "use strict").
             var statementOffset = emitPrologueDirectives(body.statements, /*startWithNewLine*/ true);
-            var helpersEmitted = emitHelpers(body);
-            if (statementOffset === 0 && !helpersEmitted && emitBlockFunctionBodyOnSingleLine) {
+            var pos = writer.getTextPos();
+            emitHelpersIndirect(body);
+            if (statementOffset === 0 && pos === writer.getTextPos() && emitBlockFunctionBodyOnSingleLine) {
                 decreaseIndent();
                 emitList(body, body.statements, 384 /* SingleLineFunctionBodyStatements */);
                 increaseIndent();
@@ -57952,21 +69739,20 @@ var ts;
             emitModifiers(node, node.modifiers);
             write("class");
             emitNodeWithPrefix(" ", node.name, emitIdentifierName);
-            var indentedFlag = ts.getEmitFlags(node) & 524288 /* Indented */;
+            var indentedFlag = ts.getEmitFlags(node) & 65536 /* Indented */;
             if (indentedFlag) {
                 increaseIndent();
             }
             emitTypeParameters(node, node.typeParameters);
             emitList(node, node.heritageClauses, 256 /* ClassHeritageClauses */);
-            var savedTempFlags = tempFlags;
-            tempFlags = 0;
+            pushNameGenerationScope();
             write(" {");
             emitList(node, node.members, 65 /* ClassMembers */);
             write("}");
+            popNameGenerationScope();
             if (indentedFlag) {
                 decreaseIndent();
             }
-            tempFlags = savedTempFlags;
         }
         function emitInterfaceDeclaration(node) {
             emitDecorators(node, node.decorators);
@@ -57993,19 +69779,18 @@ var ts;
             emitModifiers(node, node.modifiers);
             write("enum ");
             emit(node.name);
-            var savedTempFlags = tempFlags;
-            tempFlags = 0;
+            pushNameGenerationScope();
             write(" {");
             emitList(node, node.members, 81 /* EnumMembers */);
             write("}");
-            tempFlags = savedTempFlags;
+            popNameGenerationScope();
         }
         function emitModuleDeclaration(node) {
             emitModifiers(node, node.modifiers);
             write(node.flags & 16 /* Namespace */ ? "namespace " : "module ");
             emit(node.name);
             var body = node.body;
-            while (body.kind === 225 /* ModuleDeclaration */) {
+            while (body.kind === 233 /* ModuleDeclaration */) {
                 write(".");
                 emit(body.name);
                 body = body.body;
@@ -58014,23 +69799,21 @@ var ts;
             emit(body);
         }
         function emitModuleBlock(node) {
-            if (isSingleLineEmptyBlock(node)) {
+            if (isEmptyBlock(node)) {
                 write("{ }");
             }
             else {
-                var savedTempFlags = tempFlags;
-                tempFlags = 0;
+                pushNameGenerationScope();
                 write("{");
-                increaseIndent();
                 emitBlockStatements(node);
                 write("}");
-                tempFlags = savedTempFlags;
+                popNameGenerationScope();
             }
         }
         function emitCaseBlock(node) {
-            writeToken(15 /* OpenBraceToken */, node.pos);
+            writeToken(17 /* OpenBraceToken */, node.pos);
             emitList(node, node.clauses, 65 /* CaseBlockClauses */);
-            writeToken(16 /* CloseBraceToken */, node.clauses.end);
+            writeToken(18 /* CloseBraceToken */, node.clauses.end);
         }
         function emitImportEqualsDeclaration(node) {
             emitModifiers(node, node.modifiers);
@@ -58041,7 +69824,7 @@ var ts;
             write(";");
         }
         function emitModuleReference(node) {
-            if (node.kind === 69 /* Identifier */) {
+            if (node.kind === 71 /* Identifier */) {
                 emitExpression(node);
             }
             else {
@@ -58094,6 +69877,11 @@ var ts;
             }
             write(";");
         }
+        function emitNamespaceExportDeclaration(node) {
+            write("export as namespace ");
+            emit(node.name);
+            write(";");
+        }
         function emitNamedExports(node) {
             emitNamedImportsOrExports(node);
         }
@@ -58132,14 +69920,20 @@ var ts;
             write("<");
             emitJsxTagName(node.tagName);
             write(" ");
-            emitList(node, node.attributes, 131328 /* JsxElementAttributes */);
+            // We are checking here so we won't re-enter the emiting pipeline and emit extra sourcemap
+            if (node.attributes.properties && node.attributes.properties.length > 0) {
+                emit(node.attributes);
+            }
             write("/>");
         }
         function emitJsxOpeningElement(node) {
             write("<");
             emitJsxTagName(node.tagName);
-            writeIfAny(node.attributes, " ");
-            emitList(node, node.attributes, 131328 /* JsxElementAttributes */);
+            writeIfAny(node.attributes.properties, " ");
+            // We are checking here so we won't re-enter the emitting pipeline and emit extra sourcemap
+            if (node.attributes.properties && node.attributes.properties.length > 0) {
+                emit(node.attributes);
+            }
             write(">");
         }
         function emitJsxText(node) {
@@ -58150,6 +69944,9 @@ var ts;
             emitJsxTagName(node.tagName);
             write(">");
         }
+        function emitJsxAttributes(node) {
+            emitList(node, node.properties, 131328 /* JsxElementAttributes */);
+        }
         function emitJsxAttribute(node) {
             emit(node.name);
             emitWithPrefix("=", node.initializer);
@@ -58162,12 +69959,15 @@ var ts;
         function emitJsxExpression(node) {
             if (node.expression) {
                 write("{");
+                if (node.dotDotDotToken) {
+                    write("...");
+                }
                 emitExpression(node.expression);
                 write("}");
             }
         }
         function emitJsxTagName(node) {
-            if (node.kind === 69 /* Identifier */) {
+            if (node.kind === 71 /* Identifier */) {
                 emitExpression(node);
             }
             else {
@@ -58194,6 +69994,21 @@ var ts;
                 ts.nodeIsSynthesized(parentNode) ||
                     ts.nodeIsSynthesized(statements[0]) ||
                     ts.rangeStartPositionsAreOnSameLine(parentNode, statements[0], currentSourceFile));
+            // e.g:
+            //      case 0: // Zero
+            //      case 1: // One
+            //      case 2: // two
+            //          return "hi";
+            // If there is no statements, emitNodeWithComments of the parentNode which is caseClause will take care of trailing comment.
+            // So in example above, comment "// Zero" and "// One" will be emit in emitTrailingComments in emitNodeWithComments.
+            // However, for "case 2", because parentNode which is caseClause has an "end" property to be end of the statements (in this case return statement)
+            // comment "// two" will not be emitted in emitNodeWithComments.
+            // Therefore, we have to do the check here to emit such comment.
+            if (statements.length > 0) {
+                // We use emitTrailingCommentsOfPosition instead of emitLeadingCommentsOfPosition because leading comments is defined as comments before the node after newline character separating it from previous line
+                // Note: we can't use parentNode.end as such position includes statements.
+                emitTrailingCommentsOfPosition(statements.pos);
+            }
             if (emitAsSingleStatement) {
                 write(" ");
                 emit(statements[0]);
@@ -58209,12 +70024,11 @@ var ts;
             emitList(node, node.types, 272 /* HeritageClauseTypes */);
         }
         function emitCatchClause(node) {
-            writeLine();
-            var openParenPos = writeToken(72 /* CatchKeyword */, node.pos);
+            var openParenPos = writeToken(74 /* CatchKeyword */, node.pos);
             write(" ");
-            writeToken(17 /* OpenParenToken */, openParenPos);
+            writeToken(19 /* OpenParenToken */, openParenPos);
             emit(node.variableDeclaration);
-            writeToken(18 /* CloseParenToken */, node.variableDeclaration ? node.variableDeclaration.end : openParenPos);
+            writeToken(20 /* CloseParenToken */, node.variableDeclaration ? node.variableDeclaration.end : openParenPos);
             write(" ");
             emit(node.block);
         }
@@ -58232,7 +70046,7 @@ var ts;
             // "comment1" is not considered to be leading comment for node.initializer
             // but rather a trailing comment on the previous node.
             var initializer = node.initializer;
-            if ((ts.getEmitFlags(initializer) & 16384 /* NoLeadingComments */) === 0) {
+            if (emitTrailingCommentsOfPosition && (ts.getEmitFlags(initializer) & 512 /* NoLeadingComments */) === 0) {
                 var commentRange = ts.getCommentRange(initializer);
                 emitTrailingCommentsOfPosition(commentRange.pos);
             }
@@ -58245,6 +70059,12 @@ var ts;
                 emitExpression(node.objectAssignmentInitializer);
             }
         }
+        function emitSpreadAssignment(node) {
+            if (node.expression) {
+                write("...");
+                emitExpression(node.expression);
+            }
+        }
         //
         // Enum
         //
@@ -58257,33 +70077,53 @@ var ts;
         //
         function emitSourceFile(node) {
             writeLine();
-            emitShebang();
-            emitBodyWithDetachedComments(node, node.statements, emitSourceFileWorker);
+            var statements = node.statements;
+            if (emitBodyWithDetachedComments) {
+                // Emit detached comment if there are no prologue directives or if the first node is synthesized.
+                // The synthesized node will have no leading comment so some comments may be missed.
+                var shouldEmitDetachedComment = statements.length === 0 ||
+                    !ts.isPrologueDirective(statements[0]) ||
+                    ts.nodeIsSynthesized(statements[0]);
+                if (shouldEmitDetachedComment) {
+                    emitBodyWithDetachedComments(node, statements, emitSourceFileWorker);
+                    return;
+                }
+            }
+            emitSourceFileWorker(node);
         }
         function emitSourceFileWorker(node) {
             var statements = node.statements;
-            var statementOffset = emitPrologueDirectives(statements);
-            var savedTempFlags = tempFlags;
-            tempFlags = 0;
-            emitHelpers(node);
-            emitList(node, statements, 1 /* MultiLine */, statementOffset);
-            tempFlags = savedTempFlags;
+            pushNameGenerationScope();
+            emitHelpersIndirect(node);
+            var index = ts.findIndex(statements, function (statement) { return !ts.isPrologueDirective(statement); });
+            emitList(node, statements, 1 /* MultiLine */, index === -1 ? statements.length : index);
+            popNameGenerationScope();
         }
         // Transformation nodes
         function emitPartiallyEmittedExpression(node) {
             emitExpression(node.expression);
         }
+        function emitCommaList(node) {
+            emitExpressionList(node, node.elements, 272 /* CommaListElements */);
+        }
         /**
          * Emits any prologue directives at the start of a Statement list, returning the
          * number of prologue directives written to the output.
          */
-        function emitPrologueDirectives(statements, startWithNewLine) {
+        function emitPrologueDirectives(statements, startWithNewLine, seenPrologueDirectives) {
             for (var i = 0; i < statements.length; i++) {
-                if (ts.isPrologueDirective(statements[i])) {
-                    if (startWithNewLine || i > 0) {
-                        writeLine();
+                var statement = statements[i];
+                if (ts.isPrologueDirective(statement)) {
+                    var shouldEmitPrologueDirective = seenPrologueDirectives ? !seenPrologueDirectives.has(statement.expression.text) : true;
+                    if (shouldEmitPrologueDirective) {
+                        if (startWithNewLine || i > 0) {
+                            writeLine();
+                        }
+                        emit(statement);
+                        if (seenPrologueDirectives) {
+                            seenPrologueDirectives.set(statement.expression.text, statement.expression.text);
+                        }
                     }
-                    emit(statements[i]);
                 }
                 else {
                     // return index of the first non prologue directive
@@ -58292,99 +70132,45 @@ var ts;
             }
             return statements.length;
         }
-        function emitHelpers(node) {
-            var emitFlags = ts.getEmitFlags(node);
-            var helpersEmitted = false;
-            if (emitFlags & 1 /* EmitEmitHelpers */) {
-                helpersEmitted = emitEmitHelpers(currentSourceFile);
+        function emitPrologueDirectivesIfNeeded(sourceFileOrBundle) {
+            if (ts.isSourceFile(sourceFileOrBundle)) {
+                setSourceFile(sourceFileOrBundle);
+                emitPrologueDirectives(sourceFileOrBundle.statements);
             }
-            if (emitFlags & 2 /* EmitExportStar */) {
-                writeLines(exportStarHelper);
-                helpersEmitted = true;
-            }
-            if (emitFlags & 4 /* EmitSuperHelper */) {
-                writeLines(superHelper);
-                helpersEmitted = true;
-            }
-            if (emitFlags & 8 /* EmitAdvancedSuperHelper */) {
-                writeLines(advancedSuperHelper);
-                helpersEmitted = true;
+            else {
+                var seenPrologueDirectives = ts.createMap();
+                for (var _a = 0, _b = sourceFileOrBundle.sourceFiles; _a < _b.length; _a++) {
+                    var sourceFile = _b[_a];
+                    setSourceFile(sourceFile);
+                    emitPrologueDirectives(sourceFile.statements, /*startWithNewLine*/ true, seenPrologueDirectives);
+                }
             }
-            return helpersEmitted;
         }
-        function emitEmitHelpers(node) {
-            // Only emit helpers if the user did not say otherwise.
-            if (compilerOptions.noEmitHelpers) {
-                return false;
-            }
-            // Don't emit helpers if we can import them.
-            if (compilerOptions.importHelpers
-                && (ts.isExternalModule(node) || compilerOptions.isolatedModules)) {
-                return false;
-            }
-            var helpersEmitted = false;
-            // Only Emit __extends function when target ES5.
-            // For target ES6 and above, we can emit classDeclaration as is.
-            if ((languageVersion < 2 /* ES6 */) && (!extendsEmitted && node.flags & 1024 /* HasClassExtends */)) {
-                writeLines(extendsHelper);
-                extendsEmitted = true;
-                helpersEmitted = true;
-            }
-            if (compilerOptions.jsx !== 1 /* Preserve */ && !assignEmitted && (node.flags & 16384 /* HasJsxSpreadAttributes */)) {
-                writeLines(assignHelper);
-                assignEmitted = true;
-            }
-            if (!decorateEmitted && node.flags & 2048 /* HasDecorators */) {
-                writeLines(decorateHelper);
-                if (compilerOptions.emitDecoratorMetadata) {
-                    writeLines(metadataHelper);
-                }
-                decorateEmitted = true;
-                helpersEmitted = true;
-            }
-            if (!paramEmitted && node.flags & 4096 /* HasParamDecorators */) {
-                writeLines(paramHelper);
-                paramEmitted = true;
-                helpersEmitted = true;
-            }
-            if (!awaiterEmitted && node.flags & 8192 /* HasAsyncFunctions */) {
-                writeLines(awaiterHelper);
-                if (languageVersion < 2 /* ES6 */) {
-                    writeLines(generatorHelper);
-                }
-                awaiterEmitted = true;
-                helpersEmitted = true;
-            }
-            if (helpersEmitted) {
-                writeLine();
+        function emitShebangIfNeeded(sourceFileOrBundle) {
+            if (ts.isSourceFile(sourceFileOrBundle)) {
+                var shebang = ts.getShebang(sourceFileOrBundle.text);
+                if (shebang) {
+                    write(shebang);
+                    writeLine();
+                    return true;
+                }
             }
-            return helpersEmitted;
-        }
-        function writeLines(text) {
-            var lines = text.split(/\r\n|\r|\n/g);
-            for (var i = 0; i < lines.length; i++) {
-                var line = lines[i];
-                if (line.length) {
-                    if (i > 0) {
-                        writeLine();
+            else {
+                for (var _a = 0, _b = sourceFileOrBundle.sourceFiles; _a < _b.length; _a++) {
+                    var sourceFile = _b[_a];
+                    // Emit only the first encountered shebang
+                    if (emitShebangIfNeeded(sourceFile)) {
+                        break;
                     }
-                    write(line);
                 }
             }
         }
         //
         // Helpers
         //
-        function emitShebang() {
-            var shebang = ts.getShebang(currentText);
-            if (shebang) {
-                write(shebang);
-                writeLine();
-            }
-        }
         function emitModifiers(node, modifiers) {
             if (modifiers && modifiers.length) {
-                emitList(node, modifiers, 256 /* Modifiers */);
+                emitList(node, modifiers, 131328 /* Modifiers */);
                 write(" ");
             }
         }
@@ -58406,8 +70192,8 @@ var ts;
                 write(suffix);
             }
         }
-        function emitEmbeddedStatement(node) {
-            if (ts.isBlock(node)) {
+        function emitEmbeddedStatement(parent, node) {
+            if (ts.isBlock(node) || ts.getEmitFlags(parent) & 1 /* SingleLine */) {
                 write(" ");
                 emit(node);
             }
@@ -58430,11 +70216,24 @@ var ts;
         function emitParameters(parentNode, parameters) {
             emitList(parentNode, parameters, 1360 /* Parameters */);
         }
+        function canEmitSimpleArrowHead(parentNode, parameters) {
+            var parameter = ts.singleOrUndefined(parameters);
+            return parameter
+                && parameter.pos === parentNode.pos // may not have parsed tokens between parent and parameter
+                && !(ts.isArrowFunction(parentNode) && parentNode.type) // arrow function may not have return type annotation
+                && !ts.some(parentNode.decorators) // parent may not have decorators
+                && !ts.some(parentNode.modifiers) // parent may not have modifiers
+                && !ts.some(parentNode.typeParameters) // parent may not have type parameters
+                && !ts.some(parameter.decorators) // parameter may not have decorators
+                && !ts.some(parameter.modifiers) // parameter may not have modifiers
+                && !parameter.dotDotDotToken // parameter may not be rest
+                && !parameter.questionToken // parameter may not be optional
+                && !parameter.type // parameter may not have a type annotation
+                && !parameter.initializer // parameter may not have an initializer
+                && ts.isIdentifier(parameter.name); // parameter name must be identifier
+        }
         function emitParametersForArrow(parentNode, parameters) {
-            if (parameters &&
-                parameters.length === 1 &&
-                parameters[0].type === undefined &&
-                parameters[0].pos === parentNode.pos) {
+            if (canEmitSimpleArrowHead(parentNode, parameters)) {
                 emit(parameters[0]);
             }
             else {
@@ -58464,6 +70263,9 @@ var ts;
             if (format & 7680 /* BracketsMask */) {
                 write(getOpeningBracket(format));
             }
+            if (onBeforeEmitNodeArray) {
+                onBeforeEmitNodeArray(children);
+            }
             if (isEmpty) {
                 // Write a line terminator if the parent node was multi-line
                 if (format & 1 /* MultiLine */) {
@@ -58496,6 +70298,15 @@ var ts;
                     var child = children[start + i];
                     // Write the delimiter if this is not the first node.
                     if (previousSibling) {
+                        // i.e
+                        //      function commentedParameters(
+                        //          /* Parameter a */
+                        //          a
+                        //          /* End of parameter a */ -> this comment isn't considered to be trailing comment of parameter "a" due to newline
+                        //          ,
+                        if (delimiter && previousSibling.end !== parentNode.end) {
+                            emitLeadingCommentsOfPosition(previousSibling.end);
+                        }
                         write(delimiter);
                         // Write either a line terminator or whitespace to separate the elements.
                         if (shouldWriteSeparatingLineTerminator(previousSibling, child, format)) {
@@ -58512,14 +70323,16 @@ var ts;
                             write(" ");
                         }
                     }
+                    // Emit this child.
                     if (shouldEmitInterveningComments) {
-                        var commentRange = ts.getCommentRange(child);
-                        emitTrailingCommentsOfPosition(commentRange.pos);
+                        if (emitTrailingCommentsOfPosition) {
+                            var commentRange = ts.getCommentRange(child);
+                            emitTrailingCommentsOfPosition(commentRange.pos);
+                        }
                     }
                     else {
                         shouldEmitInterveningComments = mayEmitInterveningComments;
                     }
-                    // Emit this child.
                     emit(child);
                     if (shouldDecreaseIndentAfterEmit) {
                         decreaseIndent();
@@ -58532,6 +70345,15 @@ var ts;
                 if (format & 16 /* CommaDelimited */ && hasTrailingComma) {
                     write(",");
                 }
+                // Emit any trailing comment of the last element in the list
+                // i.e
+                //       var array = [...
+                //          2
+                //          /* end of element 2 */
+                //       ];
+                if (previousSibling && delimiter && previousSibling.end !== parentNode.end) {
+                    emitLeadingCommentsOfPosition(previousSibling.end);
+                }
                 // Decrease the indent, if requested.
                 if (format & 64 /* Indented */) {
                     decreaseIndent();
@@ -58544,28 +70366,89 @@ var ts;
                     write(" ");
                 }
             }
+            if (onAfterEmitNodeArray) {
+                onAfterEmitNodeArray(children);
+            }
             if (format & 7680 /* BracketsMask */) {
                 write(getClosingBracket(format));
             }
         }
+        function write(s) {
+            writer.write(s);
+        }
+        function writeLine() {
+            writer.writeLine();
+        }
+        function increaseIndent() {
+            writer.increaseIndent();
+        }
+        function decreaseIndent() {
+            writer.decreaseIndent();
+        }
         function writeIfAny(nodes, text) {
-            if (nodes && nodes.length > 0) {
+            if (ts.some(nodes)) {
                 write(text);
             }
         }
         function writeIfPresent(node, text) {
-            if (node !== undefined) {
+            if (node) {
                 write(text);
             }
         }
         function writeToken(token, pos, contextNode) {
-            return emitTokenWithSourceMap(contextNode, token, pos, writeTokenText);
+            return onEmitSourceMapOfToken
+                ? onEmitSourceMapOfToken(contextNode, token, pos, writeTokenText)
+                : writeTokenText(token, pos);
+        }
+        function writeTokenNode(node) {
+            if (onBeforeEmitToken) {
+                onBeforeEmitToken(node);
+            }
+            writeTokenText(node.kind);
+            if (onAfterEmitToken) {
+                onAfterEmitToken(node);
+            }
         }
         function writeTokenText(token, pos) {
             var tokenString = ts.tokenToString(token);
             write(tokenString);
             return pos < 0 ? pos : pos + tokenString.length;
         }
+        function writeLineOrSpace(node) {
+            if (ts.getEmitFlags(node) & 1 /* SingleLine */) {
+                write(" ");
+            }
+            else {
+                writeLine();
+            }
+        }
+        function writeLines(text) {
+            var lines = text.split(/\r\n?|\n/g);
+            var indentation = guessIndentation(lines);
+            for (var i = 0; i < lines.length; i++) {
+                var line = indentation ? lines[i].slice(indentation) : lines[i];
+                if (line.length) {
+                    writeLine();
+                    write(line);
+                    writeLine();
+                }
+            }
+        }
+        function guessIndentation(lines) {
+            var indentation;
+            for (var _a = 0, lines_1 = lines; _a < lines_1.length; _a++) {
+                var line = lines_1[_a];
+                for (var i = 0; i < line.length && (indentation === undefined || i < indentation); i++) {
+                    if (!ts.isWhiteSpaceLike(line.charCodeAt(i))) {
+                        if (indentation === undefined || i < indentation) {
+                            indentation = i;
+                            break;
+                        }
+                    }
+                }
+            }
+            return indentation;
+        }
         function increaseIndentIf(value, valueToWriteWhenNotIndenting) {
             if (value) {
                 increaseIndent();
@@ -58675,15 +70558,23 @@ var ts;
                 && !ts.nodeIsSynthesized(node2)
                 && !ts.rangeEndIsOnSameLineAsRangeStart(node1, node2, currentSourceFile);
         }
+        function isSingleLineEmptyBlock(block) {
+            return !block.multiLine
+                && isEmptyBlock(block);
+        }
+        function isEmptyBlock(block) {
+            return block.statements.length === 0
+                && ts.rangeEndIsOnSameLineAsRangeStart(block, block, currentSourceFile);
+        }
         function skipSynthesizedParentheses(node) {
-            while (node.kind === 178 /* ParenthesizedExpression */ && ts.nodeIsSynthesized(node)) {
+            while (node.kind === 185 /* ParenthesizedExpression */ && ts.nodeIsSynthesized(node)) {
                 node = node.expression;
             }
             return node;
         }
         function getTextOfNode(node, includeTrivia) {
             if (ts.isGeneratedIdentifier(node)) {
-                return getGeneratedIdentifier(node);
+                return generateName(node);
             }
             else if (ts.isIdentifier(node) && (ts.nodeIsSynthesized(node) || !node.parent)) {
                 return ts.unescapeIdentifier(node.text);
@@ -58700,29 +70591,68 @@ var ts;
             if (node.kind === 9 /* StringLiteral */ && node.textSourceNode) {
                 var textSourceNode = node.textSourceNode;
                 if (ts.isIdentifier(textSourceNode)) {
-                    return "\"" + ts.escapeNonAsciiCharacters(ts.escapeString(getTextOfNode(textSourceNode))) + "\"";
+                    return ts.getEmitFlags(node) & 16777216 /* NoAsciiEscaping */ ?
+                        "\"" + ts.escapeString(getTextOfNode(textSourceNode)) + "\"" :
+                        "\"" + ts.escapeNonAsciiString(getTextOfNode(textSourceNode)) + "\"";
                 }
                 else {
                     return getLiteralTextOfNode(textSourceNode);
                 }
             }
-            return ts.getLiteralText(node, currentSourceFile, languageVersion);
+            return ts.getLiteralText(node, currentSourceFile);
         }
-        function isSingleLineEmptyBlock(block) {
-            return !block.multiLine
-                && block.statements.length === 0
-                && ts.rangeEndIsOnSameLineAsRangeStart(block, block, currentSourceFile);
+        /**
+         * Push a new name generation scope.
+         */
+        function pushNameGenerationScope() {
+            tempFlagsStack.push(tempFlags);
+            tempFlags = 0;
+        }
+        /**
+         * Pop the current name generation scope.
+         */
+        function popNameGenerationScope() {
+            tempFlags = tempFlagsStack.pop();
+        }
+        /**
+         * Generate the text for a generated identifier.
+         */
+        function generateName(name) {
+            if (name.autoGenerateKind === 4 /* Node */) {
+                // Node names generate unique names based on their original node
+                // and are cached based on that node's id.
+                var node = getNodeForGeneratedName(name);
+                return generateNameCached(node);
+            }
+            else {
+                // Auto, Loop, and Unique names are cached based on their unique
+                // autoGenerateId.
+                var autoGenerateId = name.autoGenerateId;
+                return autoGeneratedIdToGeneratedName[autoGenerateId] || (autoGeneratedIdToGeneratedName[autoGenerateId] = ts.unescapeIdentifier(makeName(name)));
+            }
         }
+        function generateNameCached(node) {
+            var nodeId = ts.getNodeId(node);
+            return nodeIdToGeneratedName[nodeId] || (nodeIdToGeneratedName[nodeId] = ts.unescapeIdentifier(generateNameForNode(node)));
+        }
+        /**
+         * Returns a value indicating whether a name is unique globally, within the current file,
+         * or within the NameGenerator.
+         */
         function isUniqueName(name) {
-            return !resolver.hasGlobalName(name) &&
-                !ts.hasProperty(currentFileIdentifiers, name) &&
-                !ts.hasProperty(generatedNameSet, name);
+            return !(hasGlobalName && hasGlobalName(name))
+                && !currentSourceFile.identifiers.has(name)
+                && !generatedNames.has(name);
         }
+        /**
+         * Returns a value indicating whether a name is unique within a container.
+         */
         function isUniqueLocalName(name, container) {
             for (var node = container; ts.isNodeDescendantOf(node, container); node = node.nextContainer) {
-                if (node.locals && ts.hasProperty(node.locals, name)) {
+                if (node.locals) {
+                    var local = node.locals.get(name);
                     // We conservatively include alias symbols to cover cases where they're emitted as locals
-                    if (node.locals[name].flags & (107455 /* Value */ | 1048576 /* ExportValue */ | 8388608 /* Alias */)) {
+                    if (local && local.flags & (107455 /* Value */ | 1048576 /* ExportValue */ | 8388608 /* Alias */)) {
                         return false;
                     }
                 }
@@ -58730,16 +70660,16 @@ var ts;
             return true;
         }
         /**
-        * Return the next available name in the pattern _a ... _z, _0, _1, ...
-        * TempFlags._i or TempFlags._n may be used to express a preference for that dedicated name.
-        * Note that names generated by makeTempVariableName and makeUniqueName will never conflict.
-        */
+         * Return the next available name in the pattern _a ... _z, _0, _1, ...
+         * TempFlags._i or TempFlags._n may be used to express a preference for that dedicated name.
+         * Note that names generated by makeTempVariableName and makeUniqueName will never conflict.
+         */
         function makeTempVariableName(flags) {
             if (flags && !(tempFlags & flags)) {
-                var name_44 = flags === 268435456 /* _i */ ? "_i" : "_n";
-                if (isUniqueName(name_44)) {
+                var name_55 = flags === 268435456 /* _i */ ? "_i" : "_n";
+                if (isUniqueName(name_55)) {
                     tempFlags |= flags;
-                    return name_44;
+                    return name_55;
                 }
             }
             while (true) {
@@ -58747,19 +70677,21 @@ var ts;
                 tempFlags++;
                 // Skip over 'i' and 'n'
                 if (count !== 8 && count !== 13) {
-                    var name_45 = count < 26
+                    var name_56 = count < 26
                         ? "_" + String.fromCharCode(97 /* a */ + count)
                         : "_" + (count - 26);
-                    if (isUniqueName(name_45)) {
-                        return name_45;
+                    if (isUniqueName(name_56)) {
+                        return name_56;
                     }
                 }
             }
         }
-        // Generate a name that is unique within the current file and doesn't conflict with any names
-        // in global scope. The name is formed by adding an '_n' suffix to the specified base name,
-        // where n is a positive integer. Note that names generated by makeTempVariableName and
-        // makeUniqueName are guaranteed to never conflict.
+        /**
+         * Generate a name that is unique within the current file and doesn't conflict with any names
+         * in global scope. The name is formed by adding an '_n' suffix to the specified base name,
+         * where n is a positive integer. Note that names generated by makeTempVariableName and
+         * makeUniqueName are guaranteed to never conflict.
+         */
         function makeUniqueName(baseName) {
             // Find the first unique 'name_n', where n is a positive number
             if (baseName.charCodeAt(baseName.length - 1) !== 95 /* _ */) {
@@ -58769,73 +70701,90 @@ var ts;
             while (true) {
                 var generatedName = baseName + i;
                 if (isUniqueName(generatedName)) {
-                    return generatedNameSet[generatedName] = generatedName;
+                    generatedNames.set(generatedName, generatedName);
+                    return generatedName;
                 }
                 i++;
             }
         }
+        /**
+         * Generates a unique name for a ModuleDeclaration or EnumDeclaration.
+         */
         function generateNameForModuleOrEnum(node) {
             var name = getTextOfNode(node.name);
             // Use module/enum name itself if it is unique, otherwise make a unique variation
             return isUniqueLocalName(name, node) ? name : makeUniqueName(name);
         }
+        /**
+         * Generates a unique name for an ImportDeclaration or ExportDeclaration.
+         */
         function generateNameForImportOrExportDeclaration(node) {
             var expr = ts.getExternalModuleName(node);
             var baseName = expr.kind === 9 /* StringLiteral */ ?
                 ts.escapeIdentifier(ts.makeIdentifierFromModuleName(expr.text)) : "module";
             return makeUniqueName(baseName);
         }
+        /**
+         * Generates a unique name for a default export.
+         */
         function generateNameForExportDefault() {
             return makeUniqueName("default");
         }
+        /**
+         * Generates a unique name for a class expression.
+         */
         function generateNameForClassExpression() {
             return makeUniqueName("class");
         }
+        function generateNameForMethodOrAccessor(node) {
+            if (ts.isIdentifier(node.name)) {
+                return generateNameCached(node.name);
+            }
+            return makeTempVariableName(0 /* Auto */);
+        }
         /**
          * Generates a unique name from a node.
-         *
-         * @param node A node.
          */
         function generateNameForNode(node) {
             switch (node.kind) {
-                case 69 /* Identifier */:
+                case 71 /* Identifier */:
                     return makeUniqueName(getTextOfNode(node));
-                case 225 /* ModuleDeclaration */:
-                case 224 /* EnumDeclaration */:
+                case 233 /* ModuleDeclaration */:
+                case 232 /* EnumDeclaration */:
                     return generateNameForModuleOrEnum(node);
-                case 230 /* ImportDeclaration */:
-                case 236 /* ExportDeclaration */:
+                case 238 /* ImportDeclaration */:
+                case 244 /* ExportDeclaration */:
                     return generateNameForImportOrExportDeclaration(node);
-                case 220 /* FunctionDeclaration */:
-                case 221 /* ClassDeclaration */:
-                case 235 /* ExportAssignment */:
+                case 228 /* FunctionDeclaration */:
+                case 229 /* ClassDeclaration */:
+                case 243 /* ExportAssignment */:
                     return generateNameForExportDefault();
-                case 192 /* ClassExpression */:
+                case 199 /* ClassExpression */:
                     return generateNameForClassExpression();
+                case 151 /* MethodDeclaration */:
+                case 153 /* GetAccessor */:
+                case 154 /* SetAccessor */:
+                    return generateNameForMethodOrAccessor(node);
                 default:
                     return makeTempVariableName(0 /* Auto */);
             }
         }
         /**
          * Generates a unique identifier for a node.
-         *
-         * @param name A generated name.
          */
-        function generateName(name) {
+        function makeName(name) {
             switch (name.autoGenerateKind) {
                 case 1 /* Auto */:
                     return makeTempVariableName(0 /* Auto */);
                 case 2 /* Loop */:
                     return makeTempVariableName(268435456 /* _i */);
                 case 3 /* Unique */:
-                    return makeUniqueName(name.text);
+                    return makeUniqueName(ts.unescapeIdentifier(name.text));
             }
             ts.Debug.fail("Unsupported GeneratedIdentifierKind.");
         }
         /**
          * Gets the node from which a name should be generated.
-         *
-         * @param name A generated name wrapper.
          */
         function getNodeForGeneratedName(name) {
             var autoGenerateId = name.autoGenerateId;
@@ -58855,53 +70804,40 @@ var ts;
             // otherwise, return the original node for the source;
             return node;
         }
-        /**
-         * Gets the generated identifier text from a generated identifier.
-         *
-         * @param name The generated identifier.
-         */
-        function getGeneratedIdentifier(name) {
-            if (name.autoGenerateKind === 4 /* Node */) {
-                // Generated names generate unique names based on their original node
-                // and are cached based on that node's id
-                var node = getNodeForGeneratedName(name);
-                var nodeId = ts.getNodeId(node);
-                return nodeIdToGeneratedName[nodeId] || (nodeIdToGeneratedName[nodeId] = ts.unescapeIdentifier(generateNameForNode(node)));
-            }
-            else {
-                // Auto, Loop, and Unique names are cached based on their unique
-                // autoGenerateId.
-                var autoGenerateId = name.autoGenerateId;
-                return autoGeneratedIdToGeneratedName[autoGenerateId] || (autoGeneratedIdToGeneratedName[autoGenerateId] = ts.unescapeIdentifier(generateName(name)));
-            }
-        }
-        function createDelimiterMap() {
-            var delimiters = [];
-            delimiters[0 /* None */] = "";
-            delimiters[16 /* CommaDelimited */] = ",";
-            delimiters[4 /* BarDelimited */] = " |";
-            delimiters[8 /* AmpersandDelimited */] = " &";
-            return delimiters;
-        }
-        function getDelimiter(format) {
-            return delimiters[format & 28 /* DelimitersMask */];
-        }
-        function createBracketsMap() {
-            var brackets = [];
-            brackets[512 /* Braces */] = ["{", "}"];
-            brackets[1024 /* Parenthesis */] = ["(", ")"];
-            brackets[2048 /* AngleBrackets */] = ["<", ">"];
-            brackets[4096 /* SquareBrackets */] = ["[", "]"];
-            return brackets;
-        }
-        function getOpeningBracket(format) {
-            return brackets[format & 7680 /* BracketsMask */][0];
-        }
-        function getClosingBracket(format) {
-            return brackets[format & 7680 /* BracketsMask */][1];
-        }
     }
-    ts.emitFiles = emitFiles;
+    ts.createPrinter = createPrinter;
+    function createDelimiterMap() {
+        var delimiters = [];
+        delimiters[0 /* None */] = "";
+        delimiters[16 /* CommaDelimited */] = ",";
+        delimiters[4 /* BarDelimited */] = " |";
+        delimiters[8 /* AmpersandDelimited */] = " &";
+        return delimiters;
+    }
+    function getDelimiter(format) {
+        return delimiters[format & 28 /* DelimitersMask */];
+    }
+    function createBracketsMap() {
+        var brackets = [];
+        brackets[512 /* Braces */] = ["{", "}"];
+        brackets[1024 /* Parenthesis */] = ["(", ")"];
+        brackets[2048 /* AngleBrackets */] = ["<", ">"];
+        brackets[4096 /* SquareBrackets */] = ["[", "]"];
+        return brackets;
+    }
+    function getOpeningBracket(format) {
+        return brackets[format & 7680 /* BracketsMask */][0];
+    }
+    function getClosingBracket(format) {
+        return brackets[format & 7680 /* BracketsMask */][1];
+    }
+    // Flags enum to track count of temp variables and a few dedicated names
+    var TempFlags;
+    (function (TempFlags) {
+        TempFlags[TempFlags["Auto"] = 0] = "Auto";
+        TempFlags[TempFlags["CountMask"] = 268435455] = "CountMask";
+        TempFlags[TempFlags["_i"] = 268435456] = "_i";
+    })(TempFlags || (TempFlags = {}));
     var ListFormat;
     (function (ListFormat) {
         ListFormat[ListFormat["None"] = 0] = "None";
@@ -58935,9 +70871,10 @@ var ts;
         ListFormat[ListFormat["NoTrailingNewLine"] = 65536] = "NoTrailingNewLine";
         ListFormat[ListFormat["NoInterveningComments"] = 131072] = "NoInterveningComments";
         // Precomputed Formats
-        ListFormat[ListFormat["Modifiers"] = 256] = "Modifiers";
+        ListFormat[ListFormat["Modifiers"] = 131328] = "Modifiers";
         ListFormat[ListFormat["HeritageClauses"] = 256] = "HeritageClauses";
-        ListFormat[ListFormat["TypeLiteralMembers"] = 65] = "TypeLiteralMembers";
+        ListFormat[ListFormat["SingleLineTypeLiteralMembers"] = 448] = "SingleLineTypeLiteralMembers";
+        ListFormat[ListFormat["MultiLineTypeLiteralMembers"] = 65] = "MultiLineTypeLiteralMembers";
         ListFormat[ListFormat["TupleTypeElements"] = 336] = "TupleTypeElements";
         ListFormat[ListFormat["UnionTypeConstituents"] = 260] = "UnionTypeConstituents";
         ListFormat[ListFormat["IntersectionTypeConstituents"] = 264] = "IntersectionTypeConstituents";
@@ -58945,6 +70882,7 @@ var ts;
         ListFormat[ListFormat["ArrayBindingPatternElements"] = 304] = "ArrayBindingPatternElements";
         ListFormat[ListFormat["ObjectLiteralExpressionProperties"] = 978] = "ObjectLiteralExpressionProperties";
         ListFormat[ListFormat["ArrayLiteralExpressionElements"] = 4466] = "ArrayLiteralExpressionElements";
+        ListFormat[ListFormat["CommaListElements"] = 272] = "CommaListElements";
         ListFormat[ListFormat["CallExpressionArguments"] = 1296] = "CallExpressionArguments";
         ListFormat[ListFormat["NewExpressionArguments"] = 9488] = "NewExpressionArguments";
         ListFormat[ListFormat["TemplateExpressionSpans"] = 131072] = "TemplateExpressionSpans";
@@ -58976,9 +70914,8 @@ var ts;
 /// <reference path="core.ts" />
 var ts;
 (function (ts) {
-    /** The version of the TypeScript compiler release */
-    ts.version = "2.1.0";
     var emptyArray = [];
+    var ignoreDiagnosticCommentRegEx = /(^\s*$)|(^\s*\/\/\/?\s*(@ts-ignore)?)/;
     function findConfigFile(searchPath, fileExists, configName) {
         if (configName === void 0) { configName = "tsconfig.json"; }
         while (true) {
@@ -59013,7 +70950,8 @@ var ts;
                 commonPathComponents = sourcePathComponents;
                 return;
             }
-            for (var i = 0, n = Math.min(commonPathComponents.length, sourcePathComponents.length); i < n; i++) {
+            var n = Math.min(commonPathComponents.length, sourcePathComponents.length);
+            for (var i = 0; i < n; i++) {
                 if (getCanonicalFileName(commonPathComponents[i]) !== getCanonicalFileName(sourcePathComponents[i])) {
                     if (i === 0) {
                         // Failed to find any common path component
@@ -59046,8 +70984,6 @@ var ts;
             // otherwise use toLowerCase as a canonical form.
             return ts.sys.useCaseSensitiveFileNames ? fileName : fileName.toLowerCase();
         }
-        // returned by CScript sys environment
-        var unsupportedFileEncodingErrorCode = -2147024809;
         function getSourceFile(fileName, languageVersion, onError) {
             var text;
             try {
@@ -59058,20 +70994,18 @@ var ts;
             }
             catch (e) {
                 if (onError) {
-                    onError(e.number === unsupportedFileEncodingErrorCode
-                        ? ts.createCompilerDiagnostic(ts.Diagnostics.Unsupported_file_encoding).messageText
-                        : e.message);
+                    onError(e.message);
                 }
                 text = "";
             }
             return text !== undefined ? ts.createSourceFile(fileName, text, languageVersion, setParentNodes) : undefined;
         }
         function directoryExists(directoryPath) {
-            if (directoryPath in existingDirectories) {
+            if (existingDirectories.has(directoryPath)) {
                 return true;
             }
             if (ts.sys.directoryExists(directoryPath)) {
-                existingDirectories[directoryPath] = true;
+                existingDirectories.set(directoryPath, true);
                 return true;
             }
             return false;
@@ -59090,10 +71024,11 @@ var ts;
             }
             var hash = ts.sys.createHash(data);
             var mtimeBefore = ts.sys.getModifiedTime(fileName);
-            if (mtimeBefore && fileName in outputFingerprints) {
-                var fingerprint = outputFingerprints[fileName];
+            if (mtimeBefore) {
+                var fingerprint = outputFingerprints.get(fileName);
                 // If output has not been changed, and the file has no external modification
-                if (fingerprint.byteOrderMark === writeByteOrderMark &&
+                if (fingerprint &&
+                    fingerprint.byteOrderMark === writeByteOrderMark &&
                     fingerprint.hash === hash &&
                     fingerprint.mtime.getTime() === mtimeBefore.getTime()) {
                     return;
@@ -59101,11 +71036,11 @@ var ts;
             }
             ts.sys.writeFile(fileName, data, writeByteOrderMark);
             var mtimeAfter = ts.sys.getModifiedTime(fileName);
-            outputFingerprints[fileName] = {
+            outputFingerprints.set(fileName, {
                 hash: hash,
                 byteOrderMark: writeByteOrderMark,
                 mtime: mtimeAfter
-            };
+            });
         }
         function writeFile(fileName, data, writeByteOrderMark, onError) {
             try {
@@ -59144,7 +71079,7 @@ var ts;
             readFile: function (fileName) { return ts.sys.readFile(fileName); },
             trace: function (s) { return ts.sys.write(s + newLine); },
             directoryExists: function (directoryName) { return ts.sys.directoryExists(directoryName); },
-            getEnvironmentVariable: function (name) { return ts.getEnvironmentVariable(name, /*host*/ undefined); },
+            getEnvironmentVariable: function (name) { return ts.sys.getEnvironmentVariable ? ts.sys.getEnvironmentVariable(name) : ""; },
             getDirectories: function (path) { return ts.sys.getDirectories(path); },
             realpath: realpath
         };
@@ -59174,6 +71109,90 @@ var ts;
         return output;
     }
     ts.formatDiagnostics = formatDiagnostics;
+    var redForegroundEscapeSequence = "\u001b[91m";
+    var yellowForegroundEscapeSequence = "\u001b[93m";
+    var blueForegroundEscapeSequence = "\u001b[93m";
+    var gutterStyleSequence = "\u001b[100;30m";
+    var gutterSeparator = " ";
+    var resetEscapeSequence = "\u001b[0m";
+    var ellipsis = "...";
+    function getCategoryFormat(category) {
+        switch (category) {
+            case ts.DiagnosticCategory.Warning: return yellowForegroundEscapeSequence;
+            case ts.DiagnosticCategory.Error: return redForegroundEscapeSequence;
+            case ts.DiagnosticCategory.Message: return blueForegroundEscapeSequence;
+        }
+    }
+    function formatAndReset(text, formatStyle) {
+        return formatStyle + text + resetEscapeSequence;
+    }
+    function padLeft(s, length) {
+        while (s.length < length) {
+            s = " " + s;
+        }
+        return s;
+    }
+    function formatDiagnosticsWithColorAndContext(diagnostics, host) {
+        var output = "";
+        for (var _i = 0, diagnostics_2 = diagnostics; _i < diagnostics_2.length; _i++) {
+            var diagnostic = diagnostics_2[_i];
+            if (diagnostic.file) {
+                var start = diagnostic.start, length_5 = diagnostic.length, file = diagnostic.file;
+                var _a = ts.getLineAndCharacterOfPosition(file, start), firstLine = _a.line, firstLineChar = _a.character;
+                var _b = ts.getLineAndCharacterOfPosition(file, start + length_5), lastLine = _b.line, lastLineChar = _b.character;
+                var lastLineInFile = ts.getLineAndCharacterOfPosition(file, file.text.length).line;
+                var relativeFileName = host ? ts.convertToRelativePath(file.fileName, host.getCurrentDirectory(), function (fileName) { return host.getCanonicalFileName(fileName); }) : file.fileName;
+                var hasMoreThanFiveLines = (lastLine - firstLine) >= 4;
+                var gutterWidth = (lastLine + 1 + "").length;
+                if (hasMoreThanFiveLines) {
+                    gutterWidth = Math.max(ellipsis.length, gutterWidth);
+                }
+                output += ts.sys.newLine;
+                for (var i = firstLine; i <= lastLine; i++) {
+                    // If the error spans over 5 lines, we'll only show the first 2 and last 2 lines,
+                    // so we'll skip ahead to the second-to-last line.
+                    if (hasMoreThanFiveLines && firstLine + 1 < i && i < lastLine - 1) {
+                        output += formatAndReset(padLeft(ellipsis, gutterWidth), gutterStyleSequence) + gutterSeparator + ts.sys.newLine;
+                        i = lastLine - 1;
+                    }
+                    var lineStart = ts.getPositionOfLineAndCharacter(file, i, 0);
+                    var lineEnd = i < lastLineInFile ? ts.getPositionOfLineAndCharacter(file, i + 1, 0) : file.text.length;
+                    var lineContent = file.text.slice(lineStart, lineEnd);
+                    lineContent = lineContent.replace(/\s+$/g, ""); // trim from end
+                    lineContent = lineContent.replace("\t", " "); // convert tabs to single spaces
+                    // Output the gutter and the actual contents of the line.
+                    output += formatAndReset(padLeft(i + 1 + "", gutterWidth), gutterStyleSequence) + gutterSeparator;
+                    output += lineContent + ts.sys.newLine;
+                    // Output the gutter and the error span for the line using tildes.
+                    output += formatAndReset(padLeft("", gutterWidth), gutterStyleSequence) + gutterSeparator;
+                    output += redForegroundEscapeSequence;
+                    if (i === firstLine) {
+                        // If we're on the last line, then limit it to the last character of the last line.
+                        // Otherwise, we'll just squiggle the rest of the line, giving 'slice' no end position.
+                        var lastCharForLine = i === lastLine ? lastLineChar : undefined;
+                        output += lineContent.slice(0, firstLineChar).replace(/\S/g, " ");
+                        output += lineContent.slice(firstLineChar, lastCharForLine).replace(/./g, "~");
+                    }
+                    else if (i === lastLine) {
+                        output += lineContent.slice(0, lastLineChar).replace(/./g, "~");
+                    }
+                    else {
+                        // Squiggle the entire line.
+                        output += lineContent.replace(/./g, "~");
+                    }
+                    output += resetEscapeSequence;
+                    output += ts.sys.newLine;
+                }
+                output += ts.sys.newLine;
+                output += relativeFileName + "(" + (firstLine + 1) + "," + (firstLineChar + 1) + "): ";
+            }
+            var categoryColor = getCategoryFormat(diagnostic.category);
+            var category = ts.DiagnosticCategory[diagnostic.category].toLowerCase();
+            output += formatAndReset(category, categoryColor) + " TS" + diagnostic.code + ": " + flattenDiagnosticMessageText(diagnostic.messageText, ts.sys.newLine);
+        }
+        return output;
+    }
+    ts.formatDiagnosticsWithColorAndContext = formatDiagnosticsWithColorAndContext;
     function flattenDiagnosticMessageText(messageText, newLine) {
         if (typeof messageText === "string") {
             return messageText;
@@ -59203,15 +71222,32 @@ var ts;
         }
         var resolutions = [];
         var cache = ts.createMap();
-        for (var _i = 0, names_2 = names; _i < names_2.length; _i++) {
-            var name_46 = names_2[_i];
-            var result = name_46 in cache
-                ? cache[name_46]
-                : cache[name_46] = loader(name_46, containingFile);
+        for (var _i = 0, names_1 = names; _i < names_1.length; _i++) {
+            var name_57 = names_1[_i];
+            var result = void 0;
+            if (cache.has(name_57)) {
+                result = cache.get(name_57);
+            }
+            else {
+                cache.set(name_57, result = loader(name_57, containingFile));
+            }
             resolutions.push(result);
         }
         return resolutions;
     }
+    /**
+     * Create a new 'Program' instance. A Program is an immutable collection of 'SourceFile's and a 'CompilerOptions'
+     * that represent a compilation unit.
+     *
+     * Creating a program proceeds from a set of root files, expanding the set of inputs by following imports and
+     * triple-slash-reference-path directives transitively. '@types' and triple-slash-reference-types are also pulled in.
+     *
+     * @param rootNames - A set of root files.
+     * @param options - The compiler options which should be used.
+     * @param host - The host interacts with the underlying file system.
+     * @param oldProgram - Reuses an old program structure.
+     * @returns A 'Program' object.
+     */
     function createProgram(rootNames, options, host, oldProgram) {
         var program;
         var files = [];
@@ -59219,6 +71255,9 @@ var ts;
         var diagnosticsProducingTypeChecker;
         var noDiagnosticsTypeChecker;
         var classifiableNames;
+        var modifiedFilePaths;
+        var cachedSemanticDiagnosticsForFile = {};
+        var cachedDeclarationDiagnosticsForFile = {};
         var resolvedTypeReferenceDirectives = ts.createMap();
         var fileProcessingDiagnostics = ts.createDiagnosticCollection();
         // The below settings are to track if a .js file should be add to the program if loaded via searching under node_modules.
@@ -59228,7 +71267,7 @@ var ts;
         // - This calls resolveModuleNames, and then calls findSourceFile for each resolved module.
         // As all these operations happen - and are nested - within the createProgram call, they close over the below variables.
         // The current resolution depth is tracked by incrementing/decrementing as the depth first search progresses.
-        var maxNodeModulesJsDepth = typeof options.maxNodeModuleJsDepth === "number" ? options.maxNodeModuleJsDepth : 0;
+        var maxNodeModuleJsDepth = typeof options.maxNodeModuleJsDepth === "number" ? options.maxNodeModuleJsDepth : 0;
         var currentNodeModulesDepth = 0;
         // If a module has some of its imports skipped due to being at the depth limit under node_modules, then track
         // this, as it may be imported at a shallower depth later, and then it will need its skipped imports processed.
@@ -59243,12 +71282,23 @@ var ts;
         var supportedExtensions = ts.getSupportedExtensions(options);
         // Map storing if there is emit blocking diagnostics for given input
         var hasEmitBlockingDiagnostics = ts.createFileMap(getCanonicalFileName);
+        var _compilerOptionsObjectLiteralSyntax;
+        var moduleResolutionCache;
         var resolveModuleNamesWorker;
         if (host.resolveModuleNames) {
-            resolveModuleNamesWorker = function (moduleNames, containingFile) { return host.resolveModuleNames(moduleNames, containingFile); };
+            resolveModuleNamesWorker = function (moduleNames, containingFile) { return host.resolveModuleNames(moduleNames, containingFile).map(function (resolved) {
+                // An older host may have omitted extension, in which case we should infer it from the file extension of resolvedFileName.
+                if (!resolved || resolved.extension !== undefined) {
+                    return resolved;
+                }
+                var withExtension = ts.clone(resolved);
+                withExtension.extension = ts.extensionFromPath(resolved.resolvedFileName);
+                return withExtension;
+            }); };
         }
         else {
-            var loader_1 = function (moduleName, containingFile) { return ts.resolveModuleName(moduleName, containingFile, options, host).resolvedModule; };
+            moduleResolutionCache = ts.createModuleResolutionCache(currentDirectory, function (x) { return host.getCanonicalFileName(x); });
+            var loader_1 = function (moduleName, containingFile) { return ts.resolveModuleName(moduleName, containingFile, options, host, moduleResolutionCache).resolvedModule; };
             resolveModuleNamesWorker = function (moduleNames, containingFile) { return loadWithLocalCache(moduleNames, containingFile, loader_1); };
         }
         var resolveTypeReferenceDirectiveNamesWorker;
@@ -59263,13 +71313,15 @@ var ts;
         // stores 'filename -> file association' ignoring case
         // used to track cases when two file names differ only in casing
         var filesByNameIgnoreCase = host.useCaseSensitiveFileNames() ? ts.createFileMap(function (fileName) { return fileName.toLowerCase(); }) : undefined;
-        if (!tryReuseStructureFromOldProgram()) {
+        var structuralIsReused = tryReuseStructureFromOldProgram();
+        if (structuralIsReused !== 2 /* Completely */) {
             ts.forEach(rootNames, function (name) { return processRootFile(name, /*isDefaultLib*/ false); });
             // load type declarations specified via 'types' argument or implicitly from types/ and node_modules/@types folders
             var typeReferences = ts.getAutomaticTypeDirectiveNames(options, host);
-            if (typeReferences) {
+            if (typeReferences.length) {
                 // This containingFilename needs to match with the one used in managed-side
-                var containingFilename = ts.combinePaths(host.getCurrentDirectory(), "__inferred type names__.ts");
+                var containingDirectory = options.configFilePath ? ts.getDirectoryPath(options.configFilePath) : host.getCurrentDirectory();
+                var containingFilename = ts.combinePaths(containingDirectory, "__inferred type names__.ts");
                 var resolutions = resolveTypeReferenceDirectiveNamesWorker(typeReferences, containingFilename);
                 for (var i = 0; i < typeReferences.length; i++) {
                     processTypeReferenceDirective(typeReferences[i], resolutions[i]);
@@ -59293,6 +71345,8 @@ var ts;
                 }
             }
         }
+        // unconditionally set moduleResolutionCache to undefined to avoid unnecessary leaks
+        moduleResolutionCache = undefined;
         // unconditionally set oldProgram to undefined to prevent it from being captured in closure
         oldProgram = undefined;
         program = {
@@ -59318,20 +71372,23 @@ var ts;
             getTypeCount: function () { return getDiagnosticsProducingTypeChecker().getTypeCount(); },
             getFileProcessingDiagnostics: function () { return fileProcessingDiagnostics; },
             getResolvedTypeReferenceDirectives: function () { return resolvedTypeReferenceDirectives; },
-            dropDiagnosticsProducingTypeChecker: dropDiagnosticsProducingTypeChecker
+            isSourceFileFromExternalLibrary: isSourceFileFromExternalLibrary,
+            dropDiagnosticsProducingTypeChecker: dropDiagnosticsProducingTypeChecker,
+            getSourceFileFromReference: getSourceFileFromReference,
         };
         verifyCompilerOptions();
         ts.performance.mark("afterProgram");
         ts.performance.measure("Program", "beforeProgram", "afterProgram");
         return program;
         function getCommonSourceDirectory() {
-            if (typeof commonSourceDirectory === "undefined") {
-                if (options.rootDir && checkSourceFilesBelongToPath(files, options.rootDir)) {
+            if (commonSourceDirectory === undefined) {
+                var emittedFiles = ts.filter(files, function (file) { return ts.sourceFileMayBeEmitted(file, options, isSourceFileFromExternalLibrary); });
+                if (options.rootDir && checkSourceFilesBelongToPath(emittedFiles, options.rootDir)) {
                     // If a rootDir is specified and is valid use it as the commonSourceDirectory
                     commonSourceDirectory = ts.getNormalizedAbsolutePath(options.rootDir, currentDirectory);
                 }
                 else {
-                    commonSourceDirectory = computeCommonSourceDirectory(files);
+                    commonSourceDirectory = computeCommonSourceDirectory(emittedFiles);
                 }
                 if (commonSourceDirectory && commonSourceDirectory[commonSourceDirectory.length - 1] !== ts.directorySeparator) {
                     // Make sure directory path ends with directory separator so this string can directly
@@ -59349,126 +71406,257 @@ var ts;
                 classifiableNames = ts.createMap();
                 for (var _i = 0, files_2 = files; _i < files_2.length; _i++) {
                     var sourceFile = files_2[_i];
-                    ts.copyProperties(sourceFile.classifiableNames, classifiableNames);
+                    ts.copyEntries(sourceFile.classifiableNames, classifiableNames);
                 }
             }
             return classifiableNames;
         }
+        function resolveModuleNamesReusingOldState(moduleNames, containingFile, file, oldProgramState) {
+            if (structuralIsReused === 0 /* Not */ && !file.ambientModuleNames.length) {
+                // If the old program state does not permit reusing resolutions and `file` does not contain locally defined ambient modules,
+                // the best we can do is fallback to the default logic.
+                return resolveModuleNamesWorker(moduleNames, containingFile);
+            }
+            var oldSourceFile = oldProgramState.program && oldProgramState.program.getSourceFile(containingFile);
+            if (oldSourceFile !== file && file.resolvedModules) {
+                // `file` was created for the new program.
+                //
+                // We only set `file.resolvedModules` via work from the current function,
+                // so it is defined iff we already called the current function on `file`.
+                // That call happened no later than the creation of the `file` object,
+                // which per above occured during the current program creation.
+                // Since we assume the filesystem does not change during program creation,
+                // it is safe to reuse resolutions from the earlier call.
+                var result_4 = [];
+                for (var _i = 0, moduleNames_1 = moduleNames; _i < moduleNames_1.length; _i++) {
+                    var moduleName = moduleNames_1[_i];
+                    var resolvedModule = file.resolvedModules.get(moduleName);
+                    result_4.push(resolvedModule);
+                }
+                return result_4;
+            }
+            // At this point, we know at least one of the following hold:
+            // - file has local declarations for ambient modules
+            // - old program state is available
+            // With this information, we can infer some module resolutions without performing resolution.
+            /** An ordered list of module names for which we cannot recover the resolution. */
+            var unknownModuleNames;
+            /**
+             * The indexing of elements in this list matches that of `moduleNames`.
+             *
+             * Before combining results, result[i] is in one of the following states:
+             * * undefined: needs to be recomputed,
+             * * predictedToResolveToAmbientModuleMarker: known to be an ambient module.
+             * Needs to be reset to undefined before returning,
+             * * ResolvedModuleFull instance: can be reused.
+             */
+            var result;
+            /** A transient placeholder used to mark predicted resolution in the result list. */
+            var predictedToResolveToAmbientModuleMarker = {};
+            for (var i = 0; i < moduleNames.length; i++) {
+                var moduleName = moduleNames[i];
+                // If we want to reuse resolutions more aggressively, we can refine this to check for whether the
+                // text of the corresponding modulenames has changed.
+                if (file === oldSourceFile) {
+                    var oldResolvedModule = oldSourceFile && oldSourceFile.resolvedModules.get(moduleName);
+                    if (oldResolvedModule) {
+                        if (ts.isTraceEnabled(options, host)) {
+                            ts.trace(host, ts.Diagnostics.Reusing_resolution_of_module_0_to_file_1_from_old_program, moduleName, containingFile);
+                        }
+                        (result || (result = new Array(moduleNames.length)))[i] = oldResolvedModule;
+                        continue;
+                    }
+                }
+                // We know moduleName resolves to an ambient module provided that moduleName:
+                // - is in the list of ambient modules locally declared in the current source file.
+                // - resolved to an ambient module in the old program whose declaration is in an unmodified file
+                //   (so the same module declaration will land in the new program)
+                var resolvesToAmbientModuleInNonModifiedFile = false;
+                if (ts.contains(file.ambientModuleNames, moduleName)) {
+                    resolvesToAmbientModuleInNonModifiedFile = true;
+                    if (ts.isTraceEnabled(options, host)) {
+                        ts.trace(host, ts.Diagnostics.Module_0_was_resolved_as_locally_declared_ambient_module_in_file_1, moduleName, containingFile);
+                    }
+                }
+                else {
+                    resolvesToAmbientModuleInNonModifiedFile = moduleNameResolvesToAmbientModuleInNonModifiedFile(moduleName, oldProgramState);
+                }
+                if (resolvesToAmbientModuleInNonModifiedFile) {
+                    (result || (result = new Array(moduleNames.length)))[i] = predictedToResolveToAmbientModuleMarker;
+                }
+                else {
+                    // Resolution failed in the old program, or resolved to an ambient module for which we can't reuse the result.
+                    (unknownModuleNames || (unknownModuleNames = [])).push(moduleName);
+                }
+            }
+            var resolutions = unknownModuleNames && unknownModuleNames.length
+                ? resolveModuleNamesWorker(unknownModuleNames, containingFile)
+                : emptyArray;
+            // Combine results of resolutions and predicted results
+            if (!result) {
+                // There were no unresolved/ambient resolutions.
+                ts.Debug.assert(resolutions.length === moduleNames.length);
+                return resolutions;
+            }
+            var j = 0;
+            for (var i = 0; i < result.length; i++) {
+                if (result[i]) {
+                    // `result[i]` is either a `ResolvedModuleFull` or a marker.
+                    // If it is the former, we can leave it as is.
+                    if (result[i] === predictedToResolveToAmbientModuleMarker) {
+                        result[i] = undefined;
+                    }
+                }
+                else {
+                    result[i] = resolutions[j];
+                    j++;
+                }
+            }
+            ts.Debug.assert(j === resolutions.length);
+            return result;
+            // If we change our policy of rechecking failed lookups on each program create,
+            // we should adjust the value returned here.
+            function moduleNameResolvesToAmbientModuleInNonModifiedFile(moduleName, oldProgramState) {
+                var resolutionToFile = ts.getResolvedModule(oldProgramState.file, moduleName);
+                if (resolutionToFile) {
+                    // module used to be resolved to file - ignore it
+                    return false;
+                }
+                var ambientModule = oldProgramState.program && oldProgramState.program.getTypeChecker().tryFindAmbientModuleWithoutAugmentations(moduleName);
+                if (!(ambientModule && ambientModule.declarations)) {
+                    return false;
+                }
+                // at least one of declarations should come from non-modified source file
+                var firstUnmodifiedFile = ts.forEach(ambientModule.declarations, function (d) {
+                    var f = ts.getSourceFileOfNode(d);
+                    return !ts.contains(oldProgramState.modifiedFilePaths, f.path) && f;
+                });
+                if (!firstUnmodifiedFile) {
+                    return false;
+                }
+                if (ts.isTraceEnabled(options, host)) {
+                    ts.trace(host, ts.Diagnostics.Module_0_was_resolved_as_ambient_module_declared_in_1_since_this_file_was_not_modified, moduleName, firstUnmodifiedFile.fileName);
+                }
+                return true;
+            }
+        }
         function tryReuseStructureFromOldProgram() {
             if (!oldProgram) {
-                return false;
+                return 0 /* Not */;
             }
             // check properties that can affect structure of the program or module resolution strategy
             // if any of these properties has changed - structure cannot be reused
             var oldOptions = oldProgram.getCompilerOptions();
-            if ((oldOptions.module !== options.module) ||
-                (oldOptions.moduleResolution !== options.moduleResolution) ||
-                (oldOptions.noResolve !== options.noResolve) ||
-                (oldOptions.target !== options.target) ||
-                (oldOptions.noLib !== options.noLib) ||
-                (oldOptions.jsx !== options.jsx) ||
-                (oldOptions.allowJs !== options.allowJs) ||
-                (oldOptions.rootDir !== options.rootDir) ||
-                (oldOptions.configFilePath !== options.configFilePath) ||
-                (oldOptions.baseUrl !== options.baseUrl) ||
-                (oldOptions.maxNodeModuleJsDepth !== options.maxNodeModuleJsDepth) ||
-                !ts.arrayIsEqualTo(oldOptions.typeRoots, oldOptions.typeRoots) ||
-                !ts.arrayIsEqualTo(oldOptions.rootDirs, options.rootDirs) ||
-                !ts.equalOwnProperties(oldOptions.paths, options.paths)) {
-                return false;
+            if (ts.changesAffectModuleResolution(oldOptions, options)) {
+                return oldProgram.structureIsReused = 0 /* Not */;
             }
-            ts.Debug.assert(!oldProgram.structureIsReused);
+            ts.Debug.assert(!(oldProgram.structureIsReused & (2 /* Completely */ | 1 /* SafeModules */)));
             // there is an old program, check if we can reuse its structure
             var oldRootNames = oldProgram.getRootFileNames();
             if (!ts.arrayIsEqualTo(oldRootNames, rootNames)) {
-                return false;
+                return oldProgram.structureIsReused = 0 /* Not */;
             }
             if (!ts.arrayIsEqualTo(options.types, oldOptions.types)) {
-                return false;
+                return oldProgram.structureIsReused = 0 /* Not */;
             }
             // check if program source files has changed in the way that can affect structure of the program
             var newSourceFiles = [];
             var filePaths = [];
             var modifiedSourceFiles = [];
+            oldProgram.structureIsReused = 2 /* Completely */;
             for (var _i = 0, _a = oldProgram.getSourceFiles(); _i < _a.length; _i++) {
                 var oldSourceFile = _a[_i];
                 var newSourceFile = host.getSourceFileByPath
                     ? host.getSourceFileByPath(oldSourceFile.fileName, oldSourceFile.path, options.target)
                     : host.getSourceFile(oldSourceFile.fileName, options.target);
                 if (!newSourceFile) {
-                    return false;
+                    return oldProgram.structureIsReused = 0 /* Not */;
                 }
                 newSourceFile.path = oldSourceFile.path;
                 filePaths.push(newSourceFile.path);
                 if (oldSourceFile !== newSourceFile) {
+                    // The `newSourceFile` object was created for the new program.
                     if (oldSourceFile.hasNoDefaultLib !== newSourceFile.hasNoDefaultLib) {
                         // value of no-default-lib has changed
                         // this will affect if default library is injected into the list of files
-                        return false;
+                        oldProgram.structureIsReused = 1 /* SafeModules */;
                     }
                     // check tripleslash references
                     if (!ts.arrayIsEqualTo(oldSourceFile.referencedFiles, newSourceFile.referencedFiles, fileReferenceIsEqualTo)) {
                         // tripleslash references has changed
-                        return false;
+                        oldProgram.structureIsReused = 1 /* SafeModules */;
                     }
                     // check imports and module augmentations
                     collectExternalModuleReferences(newSourceFile);
                     if (!ts.arrayIsEqualTo(oldSourceFile.imports, newSourceFile.imports, moduleNameIsEqualTo)) {
                         // imports has changed
-                        return false;
+                        oldProgram.structureIsReused = 1 /* SafeModules */;
                     }
                     if (!ts.arrayIsEqualTo(oldSourceFile.moduleAugmentations, newSourceFile.moduleAugmentations, moduleNameIsEqualTo)) {
                         // moduleAugmentations has changed
-                        return false;
+                        oldProgram.structureIsReused = 1 /* SafeModules */;
                     }
                     if (!ts.arrayIsEqualTo(oldSourceFile.typeReferenceDirectives, newSourceFile.typeReferenceDirectives, fileReferenceIsEqualTo)) {
                         // 'types' references has changed
-                        return false;
+                        oldProgram.structureIsReused = 1 /* SafeModules */;
                     }
-                    var newSourceFilePath = ts.getNormalizedAbsolutePath(newSourceFile.fileName, currentDirectory);
-                    if (resolveModuleNamesWorker) {
-                        var moduleNames = ts.map(ts.concatenate(newSourceFile.imports, newSourceFile.moduleAugmentations), getTextOfLiteral);
-                        var resolutions = resolveModuleNamesWorker(moduleNames, newSourceFilePath);
-                        // ensure that module resolution results are still correct
-                        var resolutionsChanged = ts.hasChangesInResolutions(moduleNames, resolutions, oldSourceFile.resolvedModules, ts.moduleResolutionIsEqualTo);
-                        if (resolutionsChanged) {
-                            return false;
-                        }
+                    // tentatively approve the file
+                    modifiedSourceFiles.push({ oldFile: oldSourceFile, newFile: newSourceFile });
+                }
+                // if file has passed all checks it should be safe to reuse it
+                newSourceFiles.push(newSourceFile);
+            }
+            if (oldProgram.structureIsReused !== 2 /* Completely */) {
+                return oldProgram.structureIsReused;
+            }
+            modifiedFilePaths = modifiedSourceFiles.map(function (f) { return f.newFile.path; });
+            // try to verify results of module resolution
+            for (var _b = 0, modifiedSourceFiles_1 = modifiedSourceFiles; _b < modifiedSourceFiles_1.length; _b++) {
+                var _c = modifiedSourceFiles_1[_b], oldSourceFile = _c.oldFile, newSourceFile = _c.newFile;
+                var newSourceFilePath = ts.getNormalizedAbsolutePath(newSourceFile.fileName, currentDirectory);
+                if (resolveModuleNamesWorker) {
+                    var moduleNames = ts.map(ts.concatenate(newSourceFile.imports, newSourceFile.moduleAugmentations), getTextOfLiteral);
+                    var oldProgramState = { program: oldProgram, file: oldSourceFile, modifiedFilePaths: modifiedFilePaths };
+                    var resolutions = resolveModuleNamesReusingOldState(moduleNames, newSourceFilePath, newSourceFile, oldProgramState);
+                    // ensure that module resolution results are still correct
+                    var resolutionsChanged = ts.hasChangesInResolutions(moduleNames, resolutions, oldSourceFile.resolvedModules, ts.moduleResolutionIsEqualTo);
+                    if (resolutionsChanged) {
+                        oldProgram.structureIsReused = 1 /* SafeModules */;
+                        newSourceFile.resolvedModules = ts.zipToMap(moduleNames, resolutions);
                     }
-                    if (resolveTypeReferenceDirectiveNamesWorker) {
-                        var typesReferenceDirectives = ts.map(newSourceFile.typeReferenceDirectives, function (x) { return x.fileName; });
-                        var resolutions = resolveTypeReferenceDirectiveNamesWorker(typesReferenceDirectives, newSourceFilePath);
-                        // ensure that types resolutions are still correct
-                        var resolutionsChanged = ts.hasChangesInResolutions(typesReferenceDirectives, resolutions, oldSourceFile.resolvedTypeReferenceDirectiveNames, ts.typeDirectiveIsEqualTo);
-                        if (resolutionsChanged) {
-                            return false;
-                        }
+                    else {
+                        newSourceFile.resolvedModules = oldSourceFile.resolvedModules;
                     }
-                    // pass the cache of module/types resolutions from the old source file
-                    newSourceFile.resolvedModules = oldSourceFile.resolvedModules;
-                    newSourceFile.resolvedTypeReferenceDirectiveNames = oldSourceFile.resolvedTypeReferenceDirectiveNames;
-                    modifiedSourceFiles.push(newSourceFile);
                 }
-                else {
-                    // file has no changes - use it as is
-                    newSourceFile = oldSourceFile;
+                if (resolveTypeReferenceDirectiveNamesWorker) {
+                    var typesReferenceDirectives = ts.map(newSourceFile.typeReferenceDirectives, function (x) { return x.fileName; });
+                    var resolutions = resolveTypeReferenceDirectiveNamesWorker(typesReferenceDirectives, newSourceFilePath);
+                    // ensure that types resolutions are still correct
+                    var resolutionsChanged = ts.hasChangesInResolutions(typesReferenceDirectives, resolutions, oldSourceFile.resolvedTypeReferenceDirectiveNames, ts.typeDirectiveIsEqualTo);
+                    if (resolutionsChanged) {
+                        oldProgram.structureIsReused = 1 /* SafeModules */;
+                        newSourceFile.resolvedTypeReferenceDirectiveNames = ts.zipToMap(typesReferenceDirectives, resolutions);
+                    }
+                    else {
+                        newSourceFile.resolvedTypeReferenceDirectiveNames = oldSourceFile.resolvedTypeReferenceDirectiveNames;
+                    }
                 }
-                // if file has passed all checks it should be safe to reuse it
-                newSourceFiles.push(newSourceFile);
+            }
+            if (oldProgram.structureIsReused !== 2 /* Completely */) {
+                return oldProgram.structureIsReused;
             }
             // update fileName -> file mapping
-            for (var i = 0, len = newSourceFiles.length; i < len; i++) {
+            for (var i = 0; i < newSourceFiles.length; i++) {
                 filesByName.set(filePaths[i], newSourceFiles[i]);
             }
             files = newSourceFiles;
             fileProcessingDiagnostics = oldProgram.getFileProcessingDiagnostics();
-            for (var _b = 0, modifiedSourceFiles_1 = modifiedSourceFiles; _b < modifiedSourceFiles_1.length; _b++) {
-                var modifiedFile = modifiedSourceFiles_1[_b];
-                fileProcessingDiagnostics.reattachFileDiagnostics(modifiedFile);
+            for (var _d = 0, modifiedSourceFiles_2 = modifiedSourceFiles; _d < modifiedSourceFiles_2.length; _d++) {
+                var modifiedFile = modifiedSourceFiles_2[_d];
+                fileProcessingDiagnostics.reattachFileDiagnostics(modifiedFile.newFile);
             }
             resolvedTypeReferenceDirectives = oldProgram.getResolvedTypeReferenceDirectives();
-            oldProgram.structureIsReused = true;
-            return true;
+            return oldProgram.structureIsReused = 2 /* Completely */;
         }
         function getEmitHost(writeFileCallback) {
             return {
@@ -59480,11 +71668,14 @@ var ts;
                 getSourceFile: program.getSourceFile,
                 getSourceFileByPath: program.getSourceFileByPath,
                 getSourceFiles: program.getSourceFiles,
-                isSourceFileFromExternalLibrary: function (file) { return !!sourceFilesFoundSearchingNodeModules[file.path]; },
+                isSourceFileFromExternalLibrary: isSourceFileFromExternalLibrary,
                 writeFile: writeFileCallback || (function (fileName, data, writeByteOrderMark, onError, sourceFiles) { return host.writeFile(fileName, data, writeByteOrderMark, onError, sourceFiles); }),
                 isEmitBlocked: isEmitBlocked,
             };
         }
+        function isSourceFileFromExternalLibrary(file) {
+            return sourceFilesFoundSearchingNodeModules.get(file.path);
+        }
         function getDiagnosticsProducingTypeChecker() {
             return diagnosticsProducingTypeChecker || (diagnosticsProducingTypeChecker = ts.createTypeChecker(program, /*produceDiagnostics:*/ true));
         }
@@ -59494,13 +71685,13 @@ var ts;
         function getTypeChecker() {
             return noDiagnosticsTypeChecker || (noDiagnosticsTypeChecker = ts.createTypeChecker(program, /*produceDiagnostics:*/ false));
         }
-        function emit(sourceFile, writeFileCallback, cancellationToken, emitOnlyDtsFiles) {
-            return runWithCancellationToken(function () { return emitWorker(program, sourceFile, writeFileCallback, cancellationToken, emitOnlyDtsFiles); });
+        function emit(sourceFile, writeFileCallback, cancellationToken, emitOnlyDtsFiles, transformers) {
+            return runWithCancellationToken(function () { return emitWorker(program, sourceFile, writeFileCallback, cancellationToken, emitOnlyDtsFiles, transformers); });
         }
         function isEmitBlocked(emitFileName) {
             return hasEmitBlockingDiagnostics.contains(ts.toPath(emitFileName, currentDirectory, getCanonicalFileName));
         }
-        function emitWorker(program, sourceFile, writeFileCallback, cancellationToken, emitOnlyDtsFiles) {
+        function emitWorker(program, sourceFile, writeFileCallback, cancellationToken, emitOnlyDtsFiles, customTransformers) {
             var declarationDiagnostics = [];
             if (options.noEmit) {
                 return { diagnostics: declarationDiagnostics, sourceMaps: undefined, emittedFiles: undefined, emitSkipped: true };
@@ -59532,7 +71723,8 @@ var ts;
             // checked is to not pass the file to getEmitResolver.
             var emitResolver = getDiagnosticsProducingTypeChecker().getEmitResolver((options.outFile || options.out) ? undefined : sourceFile);
             ts.performance.mark("beforeEmit");
-            var emitResult = ts.emitFiles(emitResolver, getEmitHost(writeFileCallback), sourceFile, emitOnlyDtsFiles);
+            var transformers = emitOnlyDtsFiles ? [] : ts.getTransformers(options, customTransformers);
+            var emitResult = ts.emitFiles(emitResolver, getEmitHost(writeFileCallback), sourceFile, emitOnlyDtsFiles, transformers);
             ts.performance.mark("afterEmit");
             ts.performance.measure("Emit", "beforeEmit", "afterEmit");
             return emitResult;
@@ -59547,14 +71739,12 @@ var ts;
             if (sourceFile) {
                 return getDiagnostics(sourceFile, cancellationToken);
             }
-            var allDiagnostics = [];
-            ts.forEach(program.getSourceFiles(), function (sourceFile) {
+            return ts.sortAndDeduplicateDiagnostics(ts.flatMap(program.getSourceFiles(), function (sourceFile) {
                 if (cancellationToken) {
                     cancellationToken.throwIfCancellationRequested();
                 }
-                ts.addRange(allDiagnostics, getDiagnostics(sourceFile, cancellationToken));
-            });
-            return ts.sortAndDeduplicateDiagnostics(allDiagnostics);
+                return getDiagnostics(sourceFile, cancellationToken);
+            }));
         }
         function getSyntacticDiagnostics(sourceFile, cancellationToken) {
             return getDiagnosticsHelper(sourceFile, getSyntacticDiagnosticsForFile, cancellationToken);
@@ -59572,7 +71762,18 @@ var ts;
                 return getDiagnosticsHelper(sourceFile, getDeclarationDiagnosticsForFile, cancellationToken);
             }
         }
-        function getSyntacticDiagnosticsForFile(sourceFile, cancellationToken) {
+        function getSyntacticDiagnosticsForFile(sourceFile) {
+            // For JavaScript files, we report semantic errors for using TypeScript-only
+            // constructs from within a JavaScript file as syntactic errors.
+            if (ts.isSourceFileJavaScript(sourceFile)) {
+                if (!sourceFile.additionalSyntacticDiagnostics) {
+                    sourceFile.additionalSyntacticDiagnostics = getJavaScriptSyntacticDiagnosticsForFile(sourceFile);
+                    if (ts.isCheckJsEnabledForFile(sourceFile, options)) {
+                        sourceFile.additionalSyntacticDiagnostics = ts.concatenate(sourceFile.additionalSyntacticDiagnostics, sourceFile.jsDocDiagnostics);
+                    }
+                }
+                return ts.concatenate(sourceFile.additionalSyntacticDiagnostics, sourceFile.parseDiagnostics);
+            }
             return sourceFile.parseDiagnostics;
         }
         function runWithCancellationToken(func) {
@@ -59597,213 +71798,263 @@ var ts;
             }
         }
         function getSemanticDiagnosticsForFile(sourceFile, cancellationToken) {
+            return getAndCacheDiagnostics(sourceFile, cancellationToken, cachedSemanticDiagnosticsForFile, getSemanticDiagnosticsForFileNoCache);
+        }
+        function getSemanticDiagnosticsForFileNoCache(sourceFile, cancellationToken) {
             return runWithCancellationToken(function () {
+                // If skipLibCheck is enabled, skip reporting errors if file is a declaration file.
+                // If skipDefaultLibCheck is enabled, skip reporting errors if file contains a
+                // '/// <reference no-default-lib="true"/>' directive.
+                if (options.skipLibCheck && sourceFile.isDeclarationFile || options.skipDefaultLibCheck && sourceFile.hasNoDefaultLib) {
+                    return emptyArray;
+                }
                 var typeChecker = getDiagnosticsProducingTypeChecker();
                 ts.Debug.assert(!!sourceFile.bindDiagnostics);
-                var bindDiagnostics = sourceFile.bindDiagnostics;
-                // For JavaScript files, we don't want to report the normal typescript semantic errors.
-                // Instead, we just report errors for using TypeScript-only constructs from within a
-                // JavaScript file.
-                var checkDiagnostics = ts.isSourceFileJavaScript(sourceFile) ?
-                    getJavaScriptSemanticDiagnosticsForFile(sourceFile, cancellationToken) :
-                    typeChecker.getDiagnostics(sourceFile, cancellationToken);
+                // For JavaScript files, we don't want to report semantic errors unless explicitly requested.
+                var includeBindAndCheckDiagnostics = !ts.isSourceFileJavaScript(sourceFile) || ts.isCheckJsEnabledForFile(sourceFile, options);
+                var bindDiagnostics = includeBindAndCheckDiagnostics ? sourceFile.bindDiagnostics : emptyArray;
+                var checkDiagnostics = includeBindAndCheckDiagnostics ? typeChecker.getDiagnostics(sourceFile, cancellationToken) : emptyArray;
                 var fileProcessingDiagnosticsInFile = fileProcessingDiagnostics.getDiagnostics(sourceFile.fileName);
                 var programDiagnosticsInFile = programDiagnostics.getDiagnostics(sourceFile.fileName);
-                return bindDiagnostics.concat(checkDiagnostics).concat(fileProcessingDiagnosticsInFile).concat(programDiagnosticsInFile);
+                var diagnostics = bindDiagnostics.concat(checkDiagnostics, fileProcessingDiagnosticsInFile, programDiagnosticsInFile);
+                return ts.isSourceFileJavaScript(sourceFile)
+                    ? ts.filter(diagnostics, shouldReportDiagnostic)
+                    : diagnostics;
             });
         }
-        function getJavaScriptSemanticDiagnosticsForFile(sourceFile, cancellationToken) {
+        /**
+         * Skip errors if previous line start with '// @ts-ignore' comment, not counting non-empty non-comment lines
+         */
+        function shouldReportDiagnostic(diagnostic) {
+            var file = diagnostic.file, start = diagnostic.start;
+            if (file) {
+                var lineStarts = ts.getLineStarts(file);
+                var line = ts.computeLineAndCharacterOfPosition(lineStarts, start).line;
+                while (line > 0) {
+                    var previousLineText = file.text.slice(lineStarts[line - 1], lineStarts[line]);
+                    var result = ignoreDiagnosticCommentRegEx.exec(previousLineText);
+                    if (!result) {
+                        // non-empty line
+                        return true;
+                    }
+                    if (result[3]) {
+                        // @ts-ignore
+                        return false;
+                    }
+                    line--;
+                }
+            }
+            return true;
+        }
+        function getJavaScriptSyntacticDiagnosticsForFile(sourceFile) {
             return runWithCancellationToken(function () {
                 var diagnostics = [];
+                var parent = sourceFile;
                 walk(sourceFile);
                 return diagnostics;
                 function walk(node) {
-                    if (!node) {
-                        return false;
+                    // Return directly from the case if the given node doesnt want to visit each child
+                    // Otherwise break to visit each child
+                    switch (parent.kind) {
+                        case 146 /* Parameter */:
+                        case 149 /* PropertyDeclaration */:
+                            if (parent.questionToken === node) {
+                                diagnostics.push(createDiagnosticForNode(node, ts.Diagnostics._0_can_only_be_used_in_a_ts_file, "?"));
+                                return;
+                            }
+                        // falls through
+                        case 151 /* MethodDeclaration */:
+                        case 150 /* MethodSignature */:
+                        case 152 /* Constructor */:
+                        case 153 /* GetAccessor */:
+                        case 154 /* SetAccessor */:
+                        case 186 /* FunctionExpression */:
+                        case 228 /* FunctionDeclaration */:
+                        case 187 /* ArrowFunction */:
+                        case 228 /* FunctionDeclaration */:
+                        case 226 /* VariableDeclaration */:
+                            // type annotation
+                            if (parent.type === node) {
+                                diagnostics.push(createDiagnosticForNode(node, ts.Diagnostics.types_can_only_be_used_in_a_ts_file));
+                                return;
+                            }
                     }
                     switch (node.kind) {
-                        case 229 /* ImportEqualsDeclaration */:
-                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.import_can_only_be_used_in_a_ts_file));
-                            return true;
-                        case 235 /* ExportAssignment */:
+                        case 237 /* ImportEqualsDeclaration */:
+                            diagnostics.push(createDiagnosticForNode(node, ts.Diagnostics.import_can_only_be_used_in_a_ts_file));
+                            return;
+                        case 243 /* ExportAssignment */:
                             if (node.isExportEquals) {
-                                diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.export_can_only_be_used_in_a_ts_file));
-                                return true;
-                            }
-                            break;
-                        case 221 /* ClassDeclaration */:
-                            var classDeclaration = node;
-                            if (checkModifiers(classDeclaration.modifiers) ||
-                                checkTypeParameters(classDeclaration.typeParameters)) {
-                                return true;
+                                diagnostics.push(createDiagnosticForNode(node, ts.Diagnostics.export_can_only_be_used_in_a_ts_file));
+                                return;
                             }
                             break;
-                        case 251 /* HeritageClause */:
+                        case 259 /* HeritageClause */:
                             var heritageClause = node;
-                            if (heritageClause.token === 106 /* ImplementsKeyword */) {
-                                diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.implements_clauses_can_only_be_used_in_a_ts_file));
-                                return true;
-                            }
-                            break;
-                        case 222 /* InterfaceDeclaration */:
-                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.interface_declarations_can_only_be_used_in_a_ts_file));
-                            return true;
-                        case 225 /* ModuleDeclaration */:
-                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.module_declarations_can_only_be_used_in_a_ts_file));
-                            return true;
-                        case 223 /* TypeAliasDeclaration */:
-                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.type_aliases_can_only_be_used_in_a_ts_file));
-                            return true;
-                        case 147 /* MethodDeclaration */:
-                        case 146 /* MethodSignature */:
-                        case 148 /* Constructor */:
-                        case 149 /* GetAccessor */:
-                        case 150 /* SetAccessor */:
-                        case 179 /* FunctionExpression */:
-                        case 220 /* FunctionDeclaration */:
-                        case 180 /* ArrowFunction */:
-                        case 220 /* FunctionDeclaration */:
-                            var functionDeclaration = node;
-                            if (checkModifiers(functionDeclaration.modifiers) ||
-                                checkTypeParameters(functionDeclaration.typeParameters) ||
-                                checkTypeAnnotation(functionDeclaration.type)) {
-                                return true;
-                            }
-                            break;
-                        case 200 /* VariableStatement */:
-                            var variableStatement = node;
-                            if (checkModifiers(variableStatement.modifiers)) {
-                                return true;
-                            }
-                            break;
-                        case 218 /* VariableDeclaration */:
-                            var variableDeclaration = node;
-                            if (checkTypeAnnotation(variableDeclaration.type)) {
-                                return true;
-                            }
-                            break;
-                        case 174 /* CallExpression */:
-                        case 175 /* NewExpression */:
-                            var expression = node;
-                            if (expression.typeArguments && expression.typeArguments.length > 0) {
-                                var start = expression.typeArguments.pos;
-                                diagnostics.push(ts.createFileDiagnostic(sourceFile, start, expression.typeArguments.end - start, ts.Diagnostics.type_arguments_can_only_be_used_in_a_ts_file));
-                                return true;
+                            if (heritageClause.token === 108 /* ImplementsKeyword */) {
+                                diagnostics.push(createDiagnosticForNode(node, ts.Diagnostics.implements_clauses_can_only_be_used_in_a_ts_file));
+                                return;
                             }
                             break;
-                        case 142 /* Parameter */:
-                            var parameter = node;
-                            if (parameter.modifiers) {
-                                var start = parameter.modifiers.pos;
-                                diagnostics.push(ts.createFileDiagnostic(sourceFile, start, parameter.modifiers.end - start, ts.Diagnostics.parameter_modifiers_can_only_be_used_in_a_ts_file));
-                                return true;
-                            }
-                            if (parameter.questionToken) {
-                                diagnostics.push(ts.createDiagnosticForNode(parameter.questionToken, ts.Diagnostics._0_can_only_be_used_in_a_ts_file, "?"));
-                                return true;
+                        case 230 /* InterfaceDeclaration */:
+                            diagnostics.push(createDiagnosticForNode(node, ts.Diagnostics.interface_declarations_can_only_be_used_in_a_ts_file));
+                            return;
+                        case 233 /* ModuleDeclaration */:
+                            diagnostics.push(createDiagnosticForNode(node, ts.Diagnostics.module_declarations_can_only_be_used_in_a_ts_file));
+                            return;
+                        case 231 /* TypeAliasDeclaration */:
+                            diagnostics.push(createDiagnosticForNode(node, ts.Diagnostics.type_aliases_can_only_be_used_in_a_ts_file));
+                            return;
+                        case 232 /* EnumDeclaration */:
+                            diagnostics.push(createDiagnosticForNode(node, ts.Diagnostics.enum_declarations_can_only_be_used_in_a_ts_file));
+                            return;
+                        case 184 /* TypeAssertionExpression */:
+                            var typeAssertionExpression = node;
+                            diagnostics.push(createDiagnosticForNode(typeAssertionExpression.type, ts.Diagnostics.type_assertion_expressions_can_only_be_used_in_a_ts_file));
+                            return;
+                    }
+                    var prevParent = parent;
+                    parent = node;
+                    ts.forEachChild(node, walk, walkArray);
+                    parent = prevParent;
+                }
+                function walkArray(nodes) {
+                    if (parent.decorators === nodes && !options.experimentalDecorators) {
+                        diagnostics.push(createDiagnosticForNode(parent, ts.Diagnostics.Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning));
+                    }
+                    switch (parent.kind) {
+                        case 229 /* ClassDeclaration */:
+                        case 151 /* MethodDeclaration */:
+                        case 150 /* MethodSignature */:
+                        case 152 /* Constructor */:
+                        case 153 /* GetAccessor */:
+                        case 154 /* SetAccessor */:
+                        case 186 /* FunctionExpression */:
+                        case 228 /* FunctionDeclaration */:
+                        case 187 /* ArrowFunction */:
+                        case 228 /* FunctionDeclaration */:
+                            // Check type parameters
+                            if (nodes === parent.typeParameters) {
+                                diagnostics.push(createDiagnosticForNodeArray(nodes, ts.Diagnostics.type_parameter_declarations_can_only_be_used_in_a_ts_file));
+                                return;
                             }
-                            if (parameter.type) {
-                                diagnostics.push(ts.createDiagnosticForNode(parameter.type, ts.Diagnostics.types_can_only_be_used_in_a_ts_file));
-                                return true;
+                        // falls through
+                        case 208 /* VariableStatement */:
+                            // Check modifiers
+                            if (nodes === parent.modifiers) {
+                                return checkModifiers(nodes, parent.kind === 208 /* VariableStatement */);
                             }
                             break;
-                        case 145 /* PropertyDeclaration */:
-                            var propertyDeclaration = node;
-                            if (propertyDeclaration.modifiers) {
-                                for (var _i = 0, _a = propertyDeclaration.modifiers; _i < _a.length; _i++) {
+                        case 149 /* PropertyDeclaration */:
+                            // Check modifiers of property declaration
+                            if (nodes === parent.modifiers) {
+                                for (var _i = 0, _a = nodes; _i < _a.length; _i++) {
                                     var modifier = _a[_i];
-                                    if (modifier.kind !== 113 /* StaticKeyword */) {
-                                        diagnostics.push(ts.createDiagnosticForNode(modifier, ts.Diagnostics._0_can_only_be_used_in_a_ts_file, ts.tokenToString(modifier.kind)));
-                                        return true;
+                                    if (modifier.kind !== 115 /* StaticKeyword */) {
+                                        diagnostics.push(createDiagnosticForNode(modifier, ts.Diagnostics._0_can_only_be_used_in_a_ts_file, ts.tokenToString(modifier.kind)));
                                     }
                                 }
+                                return;
                             }
-                            if (checkTypeAnnotation(node.type)) {
-                                return true;
+                            break;
+                        case 146 /* Parameter */:
+                            // Check modifiers of parameter declaration
+                            if (nodes === parent.modifiers) {
+                                diagnostics.push(createDiagnosticForNodeArray(nodes, ts.Diagnostics.parameter_modifiers_can_only_be_used_in_a_ts_file));
+                                return;
                             }
                             break;
-                        case 224 /* EnumDeclaration */:
-                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.enum_declarations_can_only_be_used_in_a_ts_file));
-                            return true;
-                        case 177 /* TypeAssertionExpression */:
-                            var typeAssertionExpression = node;
-                            diagnostics.push(ts.createDiagnosticForNode(typeAssertionExpression.type, ts.Diagnostics.type_assertion_expressions_can_only_be_used_in_a_ts_file));
-                            return true;
-                        case 143 /* Decorator */:
-                            if (!options.experimentalDecorators) {
-                                diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning));
+                        case 181 /* CallExpression */:
+                        case 182 /* NewExpression */:
+                        case 201 /* ExpressionWithTypeArguments */:
+                            // Check type arguments
+                            if (nodes === parent.typeArguments) {
+                                diagnostics.push(createDiagnosticForNodeArray(nodes, ts.Diagnostics.type_arguments_can_only_be_used_in_a_ts_file));
+                                return;
                             }
-                            return true;
-                    }
-                    return ts.forEachChild(node, walk);
-                }
-                function checkTypeParameters(typeParameters) {
-                    if (typeParameters) {
-                        var start = typeParameters.pos;
-                        diagnostics.push(ts.createFileDiagnostic(sourceFile, start, typeParameters.end - start, ts.Diagnostics.type_parameter_declarations_can_only_be_used_in_a_ts_file));
-                        return true;
+                            break;
                     }
-                    return false;
-                }
-                function checkTypeAnnotation(type) {
-                    if (type) {
-                        diagnostics.push(ts.createDiagnosticForNode(type, ts.Diagnostics.types_can_only_be_used_in_a_ts_file));
-                        return true;
+                    for (var _b = 0, nodes_8 = nodes; _b < nodes_8.length; _b++) {
+                        var node = nodes_8[_b];
+                        walk(node);
                     }
-                    return false;
                 }
-                function checkModifiers(modifiers) {
-                    if (modifiers) {
-                        for (var _i = 0, modifiers_1 = modifiers; _i < modifiers_1.length; _i++) {
-                            var modifier = modifiers_1[_i];
-                            switch (modifier.kind) {
-                                case 112 /* PublicKeyword */:
-                                case 110 /* PrivateKeyword */:
-                                case 111 /* ProtectedKeyword */:
-                                case 128 /* ReadonlyKeyword */:
-                                case 122 /* DeclareKeyword */:
-                                    diagnostics.push(ts.createDiagnosticForNode(modifier, ts.Diagnostics._0_can_only_be_used_in_a_ts_file, ts.tokenToString(modifier.kind)));
-                                    return true;
-                                // These are all legal modifiers.
-                                case 113 /* StaticKeyword */:
-                                case 82 /* ExportKeyword */:
-                                case 74 /* ConstKeyword */:
-                                case 77 /* DefaultKeyword */:
-                                case 115 /* AbstractKeyword */:
-                            }
+                function checkModifiers(modifiers, isConstValid) {
+                    for (var _i = 0, modifiers_1 = modifiers; _i < modifiers_1.length; _i++) {
+                        var modifier = modifiers_1[_i];
+                        switch (modifier.kind) {
+                            case 76 /* ConstKeyword */:
+                                if (isConstValid) {
+                                    continue;
+                                }
+                            // to report error,
+                            // falls through
+                            case 114 /* PublicKeyword */:
+                            case 112 /* PrivateKeyword */:
+                            case 113 /* ProtectedKeyword */:
+                            case 131 /* ReadonlyKeyword */:
+                            case 124 /* DeclareKeyword */:
+                            case 117 /* AbstractKeyword */:
+                                diagnostics.push(createDiagnosticForNode(modifier, ts.Diagnostics._0_can_only_be_used_in_a_ts_file, ts.tokenToString(modifier.kind)));
+                                break;
+                            // These are all legal modifiers.
+                            case 115 /* StaticKeyword */:
+                            case 84 /* ExportKeyword */:
+                            case 79 /* DefaultKeyword */:
                         }
                     }
-                    return false;
+                }
+                function createDiagnosticForNodeArray(nodes, message, arg0, arg1, arg2) {
+                    var start = nodes.pos;
+                    return ts.createFileDiagnostic(sourceFile, start, nodes.end - start, message, arg0, arg1, arg2);
+                }
+                // Since these are syntactic diagnostics, parent might not have been set
+                // this means the sourceFile cannot be infered from the node
+                function createDiagnosticForNode(node, message, arg0, arg1, arg2) {
+                    return ts.createDiagnosticForNodeInSourceFile(sourceFile, node, message, arg0, arg1, arg2);
                 }
             });
         }
         function getDeclarationDiagnosticsWorker(sourceFile, cancellationToken) {
+            return getAndCacheDiagnostics(sourceFile, cancellationToken, cachedDeclarationDiagnosticsForFile, getDeclarationDiagnosticsForFileNoCache);
+        }
+        function getDeclarationDiagnosticsForFileNoCache(sourceFile, cancellationToken) {
             return runWithCancellationToken(function () {
                 var resolver = getDiagnosticsProducingTypeChecker().getEmitResolver(sourceFile, cancellationToken);
                 // Don't actually write any files since we're just getting diagnostics.
-                var writeFile = function () { };
-                return ts.getDeclarationDiagnostics(getEmitHost(writeFile), resolver, sourceFile);
+                return ts.getDeclarationDiagnostics(getEmitHost(ts.noop), resolver, sourceFile);
             });
         }
+        function getAndCacheDiagnostics(sourceFile, cancellationToken, cache, getDiagnostics) {
+            var cachedResult = sourceFile
+                ? cache.perFile && cache.perFile.get(sourceFile.path)
+                : cache.allDiagnostics;
+            if (cachedResult) {
+                return cachedResult;
+            }
+            var result = getDiagnostics(sourceFile, cancellationToken) || emptyArray;
+            if (sourceFile) {
+                if (!cache.perFile) {
+                    cache.perFile = ts.createFileMap();
+                }
+                cache.perFile.set(sourceFile.path, result);
+            }
+            else {
+                cache.allDiagnostics = result;
+            }
+            return result;
+        }
         function getDeclarationDiagnosticsForFile(sourceFile, cancellationToken) {
-            return ts.isDeclarationFile(sourceFile) ? [] : getDeclarationDiagnosticsWorker(sourceFile, cancellationToken);
+            return sourceFile.isDeclarationFile ? [] : getDeclarationDiagnosticsWorker(sourceFile, cancellationToken);
         }
         function getOptionsDiagnostics() {
-            var allDiagnostics = [];
-            ts.addRange(allDiagnostics, fileProcessingDiagnostics.getGlobalDiagnostics());
-            ts.addRange(allDiagnostics, programDiagnostics.getGlobalDiagnostics());
-            return ts.sortAndDeduplicateDiagnostics(allDiagnostics);
+            return ts.sortAndDeduplicateDiagnostics(ts.concatenate(fileProcessingDiagnostics.getGlobalDiagnostics(), ts.concatenate(programDiagnostics.getGlobalDiagnostics(), options.configFile ? programDiagnostics.getDiagnostics(options.configFile.fileName) : [])));
         }
         function getGlobalDiagnostics() {
-            var allDiagnostics = [];
-            ts.addRange(allDiagnostics, getDiagnosticsProducingTypeChecker().getGlobalDiagnostics());
-            return ts.sortAndDeduplicateDiagnostics(allDiagnostics);
-        }
-        function hasExtension(fileName) {
-            return ts.getBaseFileName(fileName).indexOf(".") >= 0;
+            return ts.sortAndDeduplicateDiagnostics(getDiagnosticsProducingTypeChecker().getGlobalDiagnostics().slice());
         }
         function processRootFile(fileName, isDefaultLib) {
-            processSourceFile(ts.normalizePath(fileName), isDefaultLib, /*isReference*/ true);
+            processSourceFile(ts.normalizePath(fileName), isDefaultLib);
         }
         function fileReferenceIsEqualTo(a, b) {
             return a.fileName === b.fileName;
@@ -59820,33 +72071,38 @@ var ts;
             }
             var isJavaScriptFile = ts.isSourceFileJavaScript(file);
             var isExternalModuleFile = ts.isExternalModule(file);
+            // file.imports may not be undefined if there exists dynamic import
             var imports;
             var moduleAugmentations;
+            var ambientModules;
             // If we are importing helpers, we need to add a synthetic reference to resolve the
             // helpers library.
             if (options.importHelpers
                 && (options.isolatedModules || isExternalModuleFile)
                 && !file.isDeclarationFile) {
-                var externalHelpersModuleReference = ts.createNode(9 /* StringLiteral */);
-                externalHelpersModuleReference.text = ts.externalHelpersModuleNameText;
-                externalHelpersModuleReference.parent = file;
+                // synthesize 'import "tslib"' declaration
+                var externalHelpersModuleReference = ts.createLiteral(ts.externalHelpersModuleNameText);
+                var importDecl = ts.createImportDeclaration(/*decorators*/ undefined, /*modifiers*/ undefined, /*importClause*/ undefined);
+                externalHelpersModuleReference.parent = importDecl;
+                importDecl.parent = file;
                 imports = [externalHelpersModuleReference];
             }
             for (var _i = 0, _a = file.statements; _i < _a.length; _i++) {
                 var node = _a[_i];
                 collectModuleReferences(node, /*inAmbientModule*/ false);
-                if (isJavaScriptFile) {
-                    collectRequireCalls(node);
+                if ((file.flags & 524288 /* PossiblyContainsDynamicImport */) || isJavaScriptFile) {
+                    collectDynamicImportOrRequireCalls(node);
                 }
             }
             file.imports = imports || emptyArray;
             file.moduleAugmentations = moduleAugmentations || emptyArray;
+            file.ambientModuleNames = ambientModules || emptyArray;
             return;
             function collectModuleReferences(node, inAmbientModule) {
                 switch (node.kind) {
-                    case 230 /* ImportDeclaration */:
-                    case 229 /* ImportEqualsDeclaration */:
-                    case 236 /* ExportDeclaration */:
+                    case 238 /* ImportDeclaration */:
+                    case 237 /* ImportEqualsDeclaration */:
+                    case 244 /* ExportDeclaration */:
                         var moduleNameExpr = ts.getExternalModuleName(node);
                         if (!moduleNameExpr || moduleNameExpr.kind !== 9 /* StringLiteral */) {
                             break;
@@ -59861,8 +72117,8 @@ var ts;
                             (imports || (imports = [])).push(moduleNameExpr);
                         }
                         break;
-                    case 225 /* ModuleDeclaration */:
-                        if (ts.isAmbientModule(node) && (inAmbientModule || ts.hasModifier(node, 2 /* Ambient */) || ts.isDeclarationFile(file))) {
+                    case 233 /* ModuleDeclaration */:
+                        if (ts.isAmbientModule(node) && (inAmbientModule || ts.hasModifier(node, 2 /* Ambient */) || file.isDeclarationFile)) {
                             var moduleName = node.name;
                             // Ambient module declarations can be interpreted as augmentations for some existing external modules.
                             // This will happen in two cases:
@@ -59873,6 +72129,10 @@ var ts;
                                 (moduleAugmentations || (moduleAugmentations = [])).push(moduleName);
                             }
                             else if (!inAmbientModule) {
+                                if (file.isDeclarationFile) {
+                                    // for global .d.ts files record name of ambient module
+                                    (ambientModules || (ambientModules = [])).push(moduleName.text);
+                                }
                                 // An AmbientExternalModuleDeclaration declares an external module.
                                 // This type of declaration is permitted only in the global module.
                                 // The StringLiteral must specify a top - level external module name.
@@ -59889,58 +72149,65 @@ var ts;
                         }
                 }
             }
-            function collectRequireCalls(node) {
+            function collectDynamicImportOrRequireCalls(node) {
                 if (ts.isRequireCall(node, /*checkArgumentIsStringLiteral*/ true)) {
                     (imports || (imports = [])).push(node.arguments[0]);
                 }
+                else if (ts.isImportCall(node) && node.arguments.length === 1 && node.arguments[0].kind === 9 /* StringLiteral */) {
+                    (imports || (imports = [])).push(node.arguments[0]);
+                }
                 else {
-                    ts.forEachChild(node, collectRequireCalls);
+                    ts.forEachChild(node, collectDynamicImportOrRequireCalls);
                 }
             }
         }
-        /**
-          * 'isReference' indicates whether the file was brought in via a reference directive (rather than an import declaration)
-          */
-        function processSourceFile(fileName, isDefaultLib, isReference, refFile, refPos, refEnd) {
-            var diagnosticArgument;
-            var diagnostic;
-            if (hasExtension(fileName)) {
+        /** This should have similar behavior to 'processSourceFile' without diagnostics or mutation. */
+        function getSourceFileFromReference(referencingFile, ref) {
+            return getSourceFileFromReferenceWorker(resolveTripleslashReference(ref.fileName, referencingFile.fileName), function (fileName) { return filesByName.get(ts.toPath(fileName, currentDirectory, getCanonicalFileName)); });
+        }
+        function getSourceFileFromReferenceWorker(fileName, getSourceFile, fail, refFile) {
+            if (ts.hasExtension(fileName)) {
                 if (!options.allowNonTsExtensions && !ts.forEach(supportedExtensions, function (extension) { return ts.fileExtensionIs(host.getCanonicalFileName(fileName), extension); })) {
-                    diagnostic = ts.Diagnostics.File_0_has_unsupported_extension_The_only_supported_extensions_are_1;
-                    diagnosticArgument = [fileName, "'" + supportedExtensions.join("', '") + "'"];
-                }
-                else if (!findSourceFile(fileName, ts.toPath(fileName, currentDirectory, getCanonicalFileName), isDefaultLib, isReference, refFile, refPos, refEnd)) {
-                    diagnostic = ts.Diagnostics.File_0_not_found;
-                    diagnosticArgument = [fileName];
-                }
-                else if (refFile && host.getCanonicalFileName(fileName) === host.getCanonicalFileName(refFile.fileName)) {
-                    diagnostic = ts.Diagnostics.A_file_cannot_have_a_reference_to_itself;
-                    diagnosticArgument = [fileName];
+                    if (fail)
+                        fail(ts.Diagnostics.File_0_has_unsupported_extension_The_only_supported_extensions_are_1, fileName, "'" + supportedExtensions.join("', '") + "'");
+                    return undefined;
                 }
-            }
-            else {
-                var nonTsFile = options.allowNonTsExtensions && findSourceFile(fileName, ts.toPath(fileName, currentDirectory, getCanonicalFileName), isDefaultLib, isReference, refFile, refPos, refEnd);
-                if (!nonTsFile) {
-                    if (options.allowNonTsExtensions) {
-                        diagnostic = ts.Diagnostics.File_0_not_found;
-                        diagnosticArgument = [fileName];
+                var sourceFile = getSourceFile(fileName);
+                if (fail) {
+                    if (!sourceFile) {
+                        fail(ts.Diagnostics.File_0_not_found, fileName);
                     }
-                    else if (!ts.forEach(supportedExtensions, function (extension) { return findSourceFile(fileName + extension, ts.toPath(fileName + extension, currentDirectory, getCanonicalFileName), isDefaultLib, isReference, refFile, refPos, refEnd); })) {
-                        diagnostic = ts.Diagnostics.File_0_not_found;
-                        fileName += ".ts";
-                        diagnosticArgument = [fileName];
+                    else if (refFile && host.getCanonicalFileName(fileName) === host.getCanonicalFileName(refFile.fileName)) {
+                        fail(ts.Diagnostics.A_file_cannot_have_a_reference_to_itself, fileName);
                     }
                 }
+                return sourceFile;
             }
-            if (diagnostic) {
-                if (refFile !== undefined && refEnd !== undefined && refPos !== undefined) {
-                    fileProcessingDiagnostics.add(ts.createFileDiagnostic.apply(void 0, [refFile, refPos, refEnd - refPos, diagnostic].concat(diagnosticArgument)));
-                }
-                else {
-                    fileProcessingDiagnostics.add(ts.createCompilerDiagnostic.apply(void 0, [diagnostic].concat(diagnosticArgument)));
+            else {
+                var sourceFileNoExtension = options.allowNonTsExtensions && getSourceFile(fileName);
+                if (sourceFileNoExtension)
+                    return sourceFileNoExtension;
+                if (fail && options.allowNonTsExtensions) {
+                    fail(ts.Diagnostics.File_0_not_found, fileName);
+                    return undefined;
                 }
+                var sourceFileWithAddedExtension = ts.forEach(supportedExtensions, function (extension) { return getSourceFile(fileName + extension); });
+                if (fail && !sourceFileWithAddedExtension)
+                    fail(ts.Diagnostics.File_0_not_found, fileName + ".ts" /* Ts */);
+                return sourceFileWithAddedExtension;
             }
         }
+        /** This has side effects through `findSourceFile`. */
+        function processSourceFile(fileName, isDefaultLib, refFile, refPos, refEnd) {
+            getSourceFileFromReferenceWorker(fileName, function (fileName) { return findSourceFile(fileName, ts.toPath(fileName, currentDirectory, getCanonicalFileName), isDefaultLib, refFile, refPos, refEnd); }, function (diagnostic) {
+                var args = [];
+                for (var _i = 1; _i < arguments.length; _i++) {
+                    args[_i - 1] = arguments[_i];
+                }
+                fileProcessingDiagnostics.add(refFile !== undefined && refEnd !== undefined && refPos !== undefined
+                    ? ts.createFileDiagnostic.apply(void 0, [refFile, refPos, refEnd - refPos, diagnostic].concat(args)) : ts.createCompilerDiagnostic.apply(void 0, [diagnostic].concat(args)));
+            }, refFile);
+        }
         function reportFileNamesDifferOnlyInCasingError(fileName, existingFileName, refFile, refPos, refEnd) {
             if (refFile !== undefined && refPos !== undefined && refEnd !== undefined) {
                 fileProcessingDiagnostics.add(ts.createFileDiagnostic(refFile, refPos, refEnd - refPos, ts.Diagnostics.File_name_0_differs_from_already_included_file_name_1_only_in_casing, fileName, existingFileName));
@@ -59950,7 +72217,7 @@ var ts;
             }
         }
         // Get source file from normalized fileName
-        function findSourceFile(fileName, path, isDefaultLib, isReference, refFile, refPos, refEnd) {
+        function findSourceFile(fileName, path, isDefaultLib, refFile, refPos, refEnd) {
             if (filesByName.contains(path)) {
                 var file_1 = filesByName.get(path);
                 // try to check if we've already seen this file but with a different casing in path
@@ -59960,19 +72227,19 @@ var ts;
                 }
                 // If the file was previously found via a node_modules search, but is now being processed as a root file,
                 // then everything it sucks in may also be marked incorrectly, and needs to be checked again.
-                if (file_1 && sourceFilesFoundSearchingNodeModules[file_1.path] && currentNodeModulesDepth == 0) {
-                    sourceFilesFoundSearchingNodeModules[file_1.path] = false;
+                if (file_1 && sourceFilesFoundSearchingNodeModules.get(file_1.path) && currentNodeModulesDepth === 0) {
+                    sourceFilesFoundSearchingNodeModules.set(file_1.path, false);
                     if (!options.noResolve) {
-                        processReferencedFiles(file_1, ts.getDirectoryPath(fileName), isDefaultLib);
+                        processReferencedFiles(file_1, isDefaultLib);
                         processTypeReferenceDirectives(file_1);
                     }
-                    modulesWithElidedImports[file_1.path] = false;
-                    processImportedModules(file_1, ts.getDirectoryPath(fileName));
+                    modulesWithElidedImports.set(file_1.path, false);
+                    processImportedModules(file_1);
                 }
-                else if (file_1 && modulesWithElidedImports[file_1.path]) {
-                    if (currentNodeModulesDepth < maxNodeModulesJsDepth) {
-                        modulesWithElidedImports[file_1.path] = false;
-                        processImportedModules(file_1, ts.getDirectoryPath(fileName));
+                else if (file_1 && modulesWithElidedImports.get(file_1.path)) {
+                    if (currentNodeModulesDepth < maxNodeModuleJsDepth) {
+                        modulesWithElidedImports.set(file_1.path, false);
+                        processImportedModules(file_1);
                     }
                 }
                 return file_1;
@@ -59988,7 +72255,7 @@ var ts;
             });
             filesByName.set(path, file);
             if (file) {
-                sourceFilesFoundSearchingNodeModules[path] = (currentNodeModulesDepth > 0);
+                sourceFilesFoundSearchingNodeModules.set(path, currentNodeModulesDepth > 0);
                 file.path = path;
                 if (host.useCaseSensitiveFileNames()) {
                     // for case-sensitive file systems check if we've already seen some file with similar filename ignoring case
@@ -60001,13 +72268,12 @@ var ts;
                     }
                 }
                 skipDefaultLib = skipDefaultLib || file.hasNoDefaultLib;
-                var basePath = ts.getDirectoryPath(fileName);
                 if (!options.noResolve) {
-                    processReferencedFiles(file, basePath, isDefaultLib);
+                    processReferencedFiles(file, isDefaultLib);
                     processTypeReferenceDirectives(file);
                 }
                 // always process imported modules to record module name resolutions
-                processImportedModules(file, basePath);
+                processImportedModules(file);
                 if (isDefaultLib) {
                     files.unshift(file);
                 }
@@ -60017,10 +72283,10 @@ var ts;
             }
             return file;
         }
-        function processReferencedFiles(file, basePath, isDefaultLib) {
+        function processReferencedFiles(file, isDefaultLib) {
             ts.forEach(file.referencedFiles, function (ref) {
                 var referencedFileName = resolveTripleslashReference(ref.fileName, file.fileName);
-                processSourceFile(referencedFileName, isDefaultLib, /*isReference*/ true, file, ref.pos, ref.end);
+                processSourceFile(referencedFileName, isDefaultLib, file, ref.pos, ref.end);
             });
         }
         function processTypeReferenceDirectives(file) {
@@ -60038,7 +72304,7 @@ var ts;
         }
         function processTypeReferenceDirective(typeReferenceDirective, resolvedTypeReferenceDirective, refFile, refPos, refEnd) {
             // If we already found this library as a primary reference - nothing to do
-            var previousResolution = resolvedTypeReferenceDirectives[typeReferenceDirective];
+            var previousResolution = resolvedTypeReferenceDirectives.get(typeReferenceDirective);
             if (previousResolution && previousResolution.primary) {
                 return;
             }
@@ -60046,22 +72312,25 @@ var ts;
             if (resolvedTypeReferenceDirective) {
                 if (resolvedTypeReferenceDirective.primary) {
                     // resolved from the primary path
-                    processSourceFile(resolvedTypeReferenceDirective.resolvedFileName, /*isDefaultLib*/ false, /*isReference*/ true, refFile, refPos, refEnd);
+                    processSourceFile(resolvedTypeReferenceDirective.resolvedFileName, /*isDefaultLib*/ false, refFile, refPos, refEnd);
                 }
                 else {
                     // If we already resolved to this file, it must have been a secondary reference. Check file contents
                     // for sameness and possibly issue an error
                     if (previousResolution) {
-                        var otherFileText = host.readFile(resolvedTypeReferenceDirective.resolvedFileName);
-                        if (otherFileText !== getSourceFile(previousResolution.resolvedFileName).text) {
-                            fileProcessingDiagnostics.add(createDiagnostic(refFile, refPos, refEnd, ts.Diagnostics.Conflicting_definitions_for_0_found_at_1_and_2_Consider_installing_a_specific_version_of_this_library_to_resolve_the_conflict, typeReferenceDirective, resolvedTypeReferenceDirective.resolvedFileName, previousResolution.resolvedFileName));
+                        // Don't bother reading the file again if it's the same file.
+                        if (resolvedTypeReferenceDirective.resolvedFileName !== previousResolution.resolvedFileName) {
+                            var otherFileText = host.readFile(resolvedTypeReferenceDirective.resolvedFileName);
+                            if (otherFileText !== getSourceFile(previousResolution.resolvedFileName).text) {
+                                fileProcessingDiagnostics.add(createDiagnostic(refFile, refPos, refEnd, ts.Diagnostics.Conflicting_definitions_for_0_found_at_1_and_2_Consider_installing_a_specific_version_of_this_library_to_resolve_the_conflict, typeReferenceDirective, resolvedTypeReferenceDirective.resolvedFileName, previousResolution.resolvedFileName));
+                            }
                         }
                         // don't overwrite previous resolution result
                         saveResolution = false;
                     }
                     else {
                         // First resolution of this library
-                        processSourceFile(resolvedTypeReferenceDirective.resolvedFileName, /*isDefaultLib*/ false, /*isReference*/ true, refFile, refPos, refEnd);
+                        processSourceFile(resolvedTypeReferenceDirective.resolvedFileName, /*isDefaultLib*/ false, refFile, refPos, refEnd);
                     }
                 }
             }
@@ -60069,7 +72338,7 @@ var ts;
                 fileProcessingDiagnostics.add(createDiagnostic(refFile, refPos, refEnd, ts.Diagnostics.Cannot_find_type_definition_file_for_0, typeReferenceDirective));
             }
             if (saveResolution) {
-                resolvedTypeReferenceDirectives[typeReferenceDirective] = resolvedTypeReferenceDirective;
+                resolvedTypeReferenceDirectives.set(typeReferenceDirective, resolvedTypeReferenceDirective);
             }
         }
         function createDiagnostic(refFile, refPos, refEnd, message) {
@@ -60087,34 +72356,43 @@ var ts;
         function getCanonicalFileName(fileName) {
             return host.getCanonicalFileName(fileName);
         }
-        function processImportedModules(file, basePath) {
+        function processImportedModules(file) {
             collectExternalModuleReferences(file);
             if (file.imports.length || file.moduleAugmentations.length) {
-                file.resolvedModules = ts.createMap();
-                var moduleNames = ts.map(ts.concatenate(file.imports, file.moduleAugmentations), getTextOfLiteral);
-                var resolutions = resolveModuleNamesWorker(moduleNames, ts.getNormalizedAbsolutePath(file.fileName, currentDirectory));
+                // Because global augmentation doesn't have string literal name, we can check for global augmentation as such.
+                var nonGlobalAugmentation = ts.filter(file.moduleAugmentations, function (moduleAugmentation) { return moduleAugmentation.kind === 9 /* StringLiteral */; });
+                var moduleNames = ts.map(ts.concatenate(file.imports, nonGlobalAugmentation), getTextOfLiteral);
+                var oldProgramState = { program: oldProgram, file: file, modifiedFilePaths: modifiedFilePaths };
+                var resolutions = resolveModuleNamesReusingOldState(moduleNames, ts.getNormalizedAbsolutePath(file.fileName, currentDirectory), file, oldProgramState);
+                ts.Debug.assert(resolutions.length === moduleNames.length);
                 for (var i = 0; i < moduleNames.length; i++) {
                     var resolution = resolutions[i];
                     ts.setResolvedModule(file, moduleNames[i], resolution);
-                    var resolvedPath = resolution ? ts.toPath(resolution.resolvedFileName, currentDirectory, getCanonicalFileName) : undefined;
+                    if (!resolution) {
+                        continue;
+                    }
+                    var isFromNodeModulesSearch = resolution.isExternalLibraryImport;
+                    var isJsFileFromNodeModules = isFromNodeModulesSearch && !ts.extensionIsTypeScript(resolution.extension);
+                    var resolvedFileName = resolution.resolvedFileName;
+                    if (isFromNodeModulesSearch) {
+                        currentNodeModulesDepth++;
+                    }
                     // add file to program only if:
                     // - resolution was successful
                     // - noResolve is falsy
                     // - module name comes from the list of imports
                     // - it's not a top level JavaScript module that exceeded the search max
-                    var isFromNodeModulesSearch = resolution && resolution.isExternalLibraryImport;
-                    var isJsFileFromNodeModules = isFromNodeModulesSearch && ts.hasJavaScriptFileExtension(resolution.resolvedFileName);
-                    if (isFromNodeModulesSearch) {
-                        currentNodeModulesDepth++;
-                    }
-                    var elideImport = isJsFileFromNodeModules && currentNodeModulesDepth > maxNodeModulesJsDepth;
-                    var shouldAddFile = resolution && !options.noResolve && i < file.imports.length && !elideImport;
+                    var elideImport = isJsFileFromNodeModules && currentNodeModulesDepth > maxNodeModuleJsDepth;
+                    // Don't add the file if it has a bad extension (e.g. 'tsx' if we don't have '--allowJs')
+                    // This may still end up being an untyped module -- the file won't be included but imports will be allowed.
+                    var shouldAddFile = resolvedFileName && !getResolutionDiagnostic(options, resolution) && !options.noResolve && i < file.imports.length && !elideImport;
                     if (elideImport) {
-                        modulesWithElidedImports[file.path] = true;
+                        modulesWithElidedImports.set(file.path, true);
                     }
                     else if (shouldAddFile) {
-                        findSourceFile(resolution.resolvedFileName, resolvedPath, 
-                        /*isDefaultLib*/ false, /*isReference*/ false, file, ts.skipTrivia(file.text, file.imports[i].pos), file.imports[i].end);
+                        var path = ts.toPath(resolvedFileName, currentDirectory, getCanonicalFileName);
+                        var pos = ts.skipTrivia(file.text, file.imports[i].pos);
+                        findSourceFile(resolvedFileName, path, /*isDefaultLib*/ false, file, pos, file.imports[i].end);
                     }
                     if (isFromNodeModulesSearch) {
                         currentNodeModulesDepth--;
@@ -60125,12 +72403,11 @@ var ts;
                 // no imports - drop cached module resolutions
                 file.resolvedModules = undefined;
             }
-            return;
         }
         function computeCommonSourceDirectory(sourceFiles) {
             var fileNames = [];
-            for (var _i = 0, sourceFiles_6 = sourceFiles; _i < sourceFiles_6.length; _i++) {
-                var file = sourceFiles_6[_i];
+            for (var _i = 0, sourceFiles_2 = sourceFiles; _i < sourceFiles_2.length; _i++) {
+                var file = sourceFiles_2[_i];
                 if (!file.isDeclarationFile) {
                     fileNames.push(file.fileName);
                 }
@@ -60141,9 +72418,9 @@ var ts;
             var allFilesBelongToPath = true;
             if (sourceFiles) {
                 var absoluteRootDirectoryPath = host.getCanonicalFileName(ts.getNormalizedAbsolutePath(rootDirectory, currentDirectory));
-                for (var _i = 0, sourceFiles_7 = sourceFiles; _i < sourceFiles_7.length; _i++) {
-                    var sourceFile = sourceFiles_7[_i];
-                    if (!ts.isDeclarationFile(sourceFile)) {
+                for (var _i = 0, sourceFiles_3 = sourceFiles; _i < sourceFiles_3.length; _i++) {
+                    var sourceFile = sourceFiles_3[_i];
+                    if (!sourceFile.isDeclarationFile) {
                         var absoluteSourceFilePath = host.getCanonicalFileName(ts.getNormalizedAbsolutePath(sourceFile.fileName, currentDirectory));
                         if (absoluteSourceFilePath.indexOf(absoluteRootDirectoryPath) !== 0) {
                             programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.File_0_is_not_under_rootDir_1_rootDir_is_expected_to_contain_all_source_files, sourceFile.fileName, options.rootDir));
@@ -60157,28 +72434,28 @@ var ts;
         function verifyCompilerOptions() {
             if (options.isolatedModules) {
                 if (options.declaration) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "declaration", "isolatedModules"));
+                    createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "declaration", "isolatedModules");
                 }
                 if (options.noEmitOnError) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "noEmitOnError", "isolatedModules"));
+                    createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "noEmitOnError", "isolatedModules");
                 }
                 if (options.out) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "out", "isolatedModules"));
+                    createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "out", "isolatedModules");
                 }
                 if (options.outFile) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "outFile", "isolatedModules"));
+                    createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "outFile", "isolatedModules");
                 }
             }
             if (options.inlineSourceMap) {
                 if (options.sourceMap) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "sourceMap", "inlineSourceMap"));
+                    createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "sourceMap", "inlineSourceMap");
                 }
                 if (options.mapRoot) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "mapRoot", "inlineSourceMap"));
+                    createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "mapRoot", "inlineSourceMap");
                 }
             }
             if (options.paths && options.baseUrl === undefined) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_paths_cannot_be_used_without_specifying_baseUrl_option));
+                createDiagnosticForOptionName(ts.Diagnostics.Option_paths_cannot_be_used_without_specifying_baseUrl_option, "paths");
             }
             if (options.paths) {
                 for (var key in options.paths) {
@@ -60186,70 +72463,74 @@ var ts;
                         continue;
                     }
                     if (!ts.hasZeroOrOneAsteriskCharacter(key)) {
-                        programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Pattern_0_can_have_at_most_one_Asterisk_character, key));
+                        createDiagnosticForOptionPaths(/*onKey*/ true, key, ts.Diagnostics.Pattern_0_can_have_at_most_one_Asterisk_character, key);
                     }
                     if (ts.isArray(options.paths[key])) {
-                        if (options.paths[key].length === 0) {
-                            programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Substitutions_for_pattern_0_shouldn_t_be_an_empty_array, key));
+                        var len = options.paths[key].length;
+                        if (len === 0) {
+                            createDiagnosticForOptionPaths(/*onKey*/ false, key, ts.Diagnostics.Substitutions_for_pattern_0_shouldn_t_be_an_empty_array, key);
                         }
-                        for (var _i = 0, _a = options.paths[key]; _i < _a.length; _i++) {
-                            var subst = _a[_i];
+                        for (var i = 0; i < len; i++) {
+                            var subst = options.paths[key][i];
                             var typeOfSubst = typeof subst;
                             if (typeOfSubst === "string") {
                                 if (!ts.hasZeroOrOneAsteriskCharacter(subst)) {
-                                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character, subst, key));
+                                    createDiagnosticForOptionPathKeyValue(key, i, ts.Diagnostics.Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character, subst, key);
                                 }
                             }
                             else {
-                                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2, subst, key, typeOfSubst));
+                                createDiagnosticForOptionPathKeyValue(key, i, ts.Diagnostics.Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2, subst, key, typeOfSubst);
                             }
                         }
                     }
                     else {
-                        programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Substitutions_for_pattern_0_should_be_an_array, key));
+                        createDiagnosticForOptionPaths(/*onKey*/ false, key, ts.Diagnostics.Substitutions_for_pattern_0_should_be_an_array, key);
                     }
                 }
             }
             if (!options.sourceMap && !options.inlineSourceMap) {
                 if (options.inlineSources) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided, "inlineSources"));
+                    createDiagnosticForOptionName(ts.Diagnostics.Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided, "inlineSources");
                 }
                 if (options.sourceRoot) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided, "sourceRoot"));
+                    createDiagnosticForOptionName(ts.Diagnostics.Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided, "sourceRoot");
                 }
             }
             if (options.out && options.outFile) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "out", "outFile"));
+                createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "out", "outFile");
             }
             if (options.mapRoot && !options.sourceMap) {
                 // Error to specify --mapRoot without --sourcemap
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "mapRoot", "sourceMap"));
+                createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "mapRoot", "sourceMap");
             }
             if (options.declarationDir) {
                 if (!options.declaration) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "declarationDir", "declaration"));
+                    createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "declarationDir", "declaration");
                 }
                 if (options.out || options.outFile) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "declarationDir", options.out ? "out" : "outFile"));
+                    createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "declarationDir", options.out ? "out" : "outFile");
                 }
             }
             if (options.lib && options.noLib) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "lib", "noLib"));
+                createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "lib", "noLib");
+            }
+            if (options.noImplicitUseStrict && (options.alwaysStrict === undefined ? options.strict : options.alwaysStrict)) {
+                createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "noImplicitUseStrict", "alwaysStrict");
             }
             var languageVersion = options.target || 0 /* ES3 */;
             var outFile = options.outFile || options.out;
-            var firstNonAmbientExternalModuleSourceFile = ts.forEach(files, function (f) { return ts.isExternalModule(f) && !ts.isDeclarationFile(f) ? f : undefined; });
+            var firstNonAmbientExternalModuleSourceFile = ts.forEach(files, function (f) { return ts.isExternalModule(f) && !f.isDeclarationFile ? f : undefined; });
             if (options.isolatedModules) {
-                if (options.module === ts.ModuleKind.None && languageVersion < 2 /* ES6 */) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES2015_or_higher));
+                if (options.module === ts.ModuleKind.None && languageVersion < 2 /* ES2015 */) {
+                    createDiagnosticForOptionName(ts.Diagnostics.Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES2015_or_higher, "isolatedModules", "target");
                 }
-                var firstNonExternalModuleSourceFile = ts.forEach(files, function (f) { return !ts.isExternalModule(f) && !ts.isDeclarationFile(f) ? f : undefined; });
+                var firstNonExternalModuleSourceFile = ts.forEach(files, function (f) { return !ts.isExternalModule(f) && !f.isDeclarationFile ? f : undefined; });
                 if (firstNonExternalModuleSourceFile) {
                     var span_7 = ts.getErrorSpanForNode(firstNonExternalModuleSourceFile, firstNonExternalModuleSourceFile);
                     programDiagnostics.add(ts.createFileDiagnostic(firstNonExternalModuleSourceFile, span_7.start, span_7.length, ts.Diagnostics.Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided));
                 }
             }
-            else if (firstNonAmbientExternalModuleSourceFile && languageVersion < 2 /* ES6 */ && options.module === ts.ModuleKind.None) {
+            else if (firstNonAmbientExternalModuleSourceFile && languageVersion < 2 /* ES2015 */ && options.module === ts.ModuleKind.None) {
                 // We cannot use createDiagnosticFromNode because nodes do not have parents yet
                 var span_8 = ts.getErrorSpanForNode(firstNonAmbientExternalModuleSourceFile, firstNonAmbientExternalModuleSourceFile.externalModuleIndicator);
                 programDiagnostics.add(ts.createFileDiagnostic(firstNonAmbientExternalModuleSourceFile, span_8.start, span_8.length, ts.Diagnostics.Cannot_use_imports_exports_or_module_augmentations_when_module_is_none));
@@ -60257,7 +72538,7 @@ var ts;
             // Cannot specify module gen that isn't amd or system with --out
             if (outFile) {
                 if (options.module && !(options.module === ts.ModuleKind.AMD || options.module === ts.ModuleKind.System)) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Only_amd_and_system_modules_are_supported_alongside_0, options.out ? "out" : "outFile"));
+                    createDiagnosticForOptionName(ts.Diagnostics.Only_amd_and_system_modules_are_supported_alongside_0, options.out ? "out" : "outFile", "module");
                 }
                 else if (options.module === undefined && firstNonAmbientExternalModuleSourceFile) {
                     var span_9 = ts.getErrorSpanForNode(firstNonAmbientExternalModuleSourceFile, firstNonAmbientExternalModuleSourceFile.externalModuleIndicator);
@@ -60273,24 +72554,35 @@ var ts;
                 var dir = getCommonSourceDirectory();
                 // If we failed to find a good common directory, but outDir is specified and at least one of our files is on a windows drive/URL/other resource, add a failure
                 if (options.outDir && dir === "" && ts.forEach(files, function (file) { return ts.getRootLength(file.fileName) > 1; })) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_find_the_common_subdirectory_path_for_the_input_files));
+                    createDiagnosticForOptionName(ts.Diagnostics.Cannot_find_the_common_subdirectory_path_for_the_input_files, "outDir");
                 }
             }
             if (!options.noEmit && options.allowJs && options.declaration) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "allowJs", "declaration"));
+                createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "allowJs", "declaration");
+            }
+            if (options.checkJs && !options.allowJs) {
+                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "checkJs", "allowJs"));
             }
             if (options.emitDecoratorMetadata &&
                 !options.experimentalDecorators) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "emitDecoratorMetadata", "experimentalDecorators"));
+                createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "emitDecoratorMetadata", "experimentalDecorators");
+            }
+            if (options.jsxFactory) {
+                if (options.reactNamespace) {
+                    createDiagnosticForOptionName(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "reactNamespace", "jsxFactory");
+                }
+                if (!ts.parseIsolatedEntityName(options.jsxFactory, languageVersion)) {
+                    createOptionValueDiagnostic("jsxFactory", ts.Diagnostics.Invalid_value_for_jsxFactory_0_is_not_a_valid_identifier_or_qualified_name, options.jsxFactory);
+                }
             }
-            if (options.reactNamespace && !ts.isIdentifierText(options.reactNamespace, languageVersion)) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier, options.reactNamespace));
+            else if (options.reactNamespace && !ts.isIdentifierText(options.reactNamespace, languageVersion)) {
+                createOptionValueDiagnostic("reactNamespace", ts.Diagnostics.Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier, options.reactNamespace);
             }
             // If the emit is enabled make sure that every output file is unique and not overwriting any of the input files
             if (!options.noEmit && !options.suppressOutputPathCheck) {
                 var emitHost = getEmitHost();
                 var emitFilesSeen_1 = ts.createFileMap(!host.useCaseSensitiveFileNames() ? function (key) { return key.toLocaleLowerCase(); } : undefined);
-                ts.forEachExpectedEmitFile(emitHost, function (emitFileNames, sourceFiles, isBundledEmit) {
+                ts.forEachEmittedFile(emitHost, function (emitFileNames) {
                     verifyEmitFilePath(emitFileNames.jsFilePath, emitFilesSeen_1);
                     verifyEmitFilePath(emitFileNames.declarationFilePath, emitFilesSeen_1);
                 });
@@ -60301,12 +72593,18 @@ var ts;
                     var emitFilePath = ts.toPath(emitFileName, currentDirectory, getCanonicalFileName);
                     // Report error if the output overwrites input file
                     if (filesByName.contains(emitFilePath)) {
-                        createEmitBlockingDiagnostics(emitFileName, emitFilePath, ts.Diagnostics.Cannot_write_file_0_because_it_would_overwrite_input_file);
+                        var chain_1;
+                        if (!options.configFilePath) {
+                            // The program is from either an inferred project or an external project
+                            chain_1 = ts.chainDiagnosticMessages(/*details*/ undefined, ts.Diagnostics.Adding_a_tsconfig_json_file_will_help_organize_projects_that_contain_both_TypeScript_and_JavaScript_files_Learn_more_at_https_Colon_Slash_Slashaka_ms_Slashtsconfig);
+                        }
+                        chain_1 = ts.chainDiagnosticMessages(chain_1, ts.Diagnostics.Cannot_write_file_0_because_it_would_overwrite_input_file, emitFileName);
+                        blockEmittingOfFile(emitFileName, ts.createCompilerDiagnosticFromMessageChain(chain_1));
                     }
                     // Report error if multiple files write into same file
                     if (emitFilesSeen.contains(emitFilePath)) {
                         // Already seen the same emit file - report error
-                        createEmitBlockingDiagnostics(emitFileName, emitFilePath, ts.Diagnostics.Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files);
+                        blockEmittingOfFile(emitFileName, ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files, emitFileName));
                     }
                     else {
                         emitFilesSeen.set(emitFilePath, true);
@@ -60314,12 +72612,118 @@ var ts;
                 }
             }
         }
-        function createEmitBlockingDiagnostics(emitFileName, emitFilePath, message) {
+        function createDiagnosticForOptionPathKeyValue(key, valueIndex, message, arg0, arg1, arg2) {
+            var needCompilerDiagnostic = true;
+            var pathsSyntax = getOptionPathsSyntax();
+            for (var _i = 0, pathsSyntax_1 = pathsSyntax; _i < pathsSyntax_1.length; _i++) {
+                var pathProp = pathsSyntax_1[_i];
+                if (ts.isObjectLiteralExpression(pathProp.initializer)) {
+                    for (var _a = 0, _b = ts.getPropertyAssignment(pathProp.initializer, key); _a < _b.length; _a++) {
+                        var keyProps = _b[_a];
+                        if (ts.isArrayLiteralExpression(keyProps.initializer) &&
+                            keyProps.initializer.elements.length > valueIndex) {
+                            programDiagnostics.add(ts.createDiagnosticForNodeInSourceFile(options.configFile, keyProps.initializer.elements[valueIndex], message, arg0, arg1, arg2));
+                            needCompilerDiagnostic = false;
+                        }
+                    }
+                }
+            }
+            if (needCompilerDiagnostic) {
+                programDiagnostics.add(ts.createCompilerDiagnostic(message, arg0, arg1, arg2));
+            }
+        }
+        function createDiagnosticForOptionPaths(onKey, key, message, arg0) {
+            var needCompilerDiagnostic = true;
+            var pathsSyntax = getOptionPathsSyntax();
+            for (var _i = 0, pathsSyntax_2 = pathsSyntax; _i < pathsSyntax_2.length; _i++) {
+                var pathProp = pathsSyntax_2[_i];
+                if (ts.isObjectLiteralExpression(pathProp.initializer) &&
+                    createOptionDiagnosticInObjectLiteralSyntax(pathProp.initializer, onKey, key, /*key2*/ undefined, message, arg0)) {
+                    needCompilerDiagnostic = false;
+                }
+            }
+            if (needCompilerDiagnostic) {
+                programDiagnostics.add(ts.createCompilerDiagnostic(message, arg0));
+            }
+        }
+        function getOptionPathsSyntax() {
+            var compilerOptionsObjectLiteralSyntax = getCompilerOptionsObjectLiteralSyntax();
+            if (compilerOptionsObjectLiteralSyntax) {
+                return ts.getPropertyAssignment(compilerOptionsObjectLiteralSyntax, "paths");
+            }
+            return emptyArray;
+        }
+        function createDiagnosticForOptionName(message, option1, option2) {
+            createDiagnosticForOption(/*onKey*/ true, option1, option2, message, option1, option2);
+        }
+        function createOptionValueDiagnostic(option1, message, arg0) {
+            createDiagnosticForOption(/*onKey*/ false, option1, /*option2*/ undefined, message, arg0);
+        }
+        function createDiagnosticForOption(onKey, option1, option2, message, arg0, arg1) {
+            var compilerOptionsObjectLiteralSyntax = getCompilerOptionsObjectLiteralSyntax();
+            var needCompilerDiagnostic = !compilerOptionsObjectLiteralSyntax ||
+                !createOptionDiagnosticInObjectLiteralSyntax(compilerOptionsObjectLiteralSyntax, onKey, option1, option2, message, arg0, arg1);
+            if (needCompilerDiagnostic) {
+                programDiagnostics.add(ts.createCompilerDiagnostic(message, arg0, arg1));
+            }
+        }
+        function getCompilerOptionsObjectLiteralSyntax() {
+            if (_compilerOptionsObjectLiteralSyntax === undefined) {
+                _compilerOptionsObjectLiteralSyntax = null; // tslint:disable-line:no-null-keyword
+                if (options.configFile && options.configFile.jsonObject) {
+                    for (var _i = 0, _a = ts.getPropertyAssignment(options.configFile.jsonObject, "compilerOptions"); _i < _a.length; _i++) {
+                        var prop = _a[_i];
+                        if (ts.isObjectLiteralExpression(prop.initializer)) {
+                            _compilerOptionsObjectLiteralSyntax = prop.initializer;
+                            break;
+                        }
+                    }
+                }
+            }
+            return _compilerOptionsObjectLiteralSyntax;
+        }
+        function createOptionDiagnosticInObjectLiteralSyntax(objectLiteral, onKey, key1, key2, message, arg0, arg1) {
+            var props = ts.getPropertyAssignment(objectLiteral, key1, key2);
+            for (var _i = 0, props_2 = props; _i < props_2.length; _i++) {
+                var prop = props_2[_i];
+                programDiagnostics.add(ts.createDiagnosticForNodeInSourceFile(options.configFile, onKey ? prop.name : prop.initializer, message, arg0, arg1));
+            }
+            return !!props.length;
+        }
+        function blockEmittingOfFile(emitFileName, diag) {
             hasEmitBlockingDiagnostics.set(ts.toPath(emitFileName, currentDirectory, getCanonicalFileName), true);
-            programDiagnostics.add(ts.createCompilerDiagnostic(message, emitFileName));
+            programDiagnostics.add(diag);
         }
     }
     ts.createProgram = createProgram;
+    /* @internal */
+    /**
+     * Returns a DiagnosticMessage if we won't include a resolved module due to its extension.
+     * The DiagnosticMessage's parameters are the imported module name, and the filename it resolved to.
+     * This returns a diagnostic even if the module will be an untyped module.
+     */
+    function getResolutionDiagnostic(options, _a) {
+        var extension = _a.extension;
+        switch (extension) {
+            case ".ts" /* Ts */:
+            case ".d.ts" /* Dts */:
+                // These are always allowed.
+                return undefined;
+            case ".tsx" /* Tsx */:
+                return needJsx();
+            case ".jsx" /* Jsx */:
+                return needJsx() || needAllowJs();
+            case ".js" /* Js */:
+                return needAllowJs();
+        }
+        function needJsx() {
+            return options.jsx ? undefined : ts.Diagnostics.Module_0_was_resolved_to_1_but_jsx_is_not_set;
+        }
+        function needAllowJs() {
+            return options.allowJs ? undefined : ts.Diagnostics.Module_0_was_resolved_to_1_but_allowJs_is_not_set;
+        }
+    }
+    ts.getResolutionDiagnostic = getResolutionDiagnostic;
 })(ts || (ts = {}));
 /// <reference path="program.ts"/>
 /// <reference path="commandLineParser.ts"/>
@@ -60335,13 +72739,13 @@ var ts;
         reportDiagnosticWorker(diagnostic, host || defaultFormatDiagnosticsHost);
     }
     function reportDiagnostics(diagnostics, host) {
-        for (var _i = 0, diagnostics_2 = diagnostics; _i < diagnostics_2.length; _i++) {
-            var diagnostic = diagnostics_2[_i];
+        for (var _i = 0, diagnostics_3 = diagnostics; _i < diagnostics_3.length; _i++) {
+            var diagnostic = diagnostics_3[_i];
             reportDiagnostic(diagnostic, host);
         }
     }
-    function reportEmittedFiles(files, host) {
-        if (!files || files.length == 0) {
+    function reportEmittedFiles(files) {
+        if (!files || files.length === 0) {
             return;
         }
         var currentDir = ts.sys.getCurrentDirectory();
@@ -60351,54 +72755,6 @@ var ts;
             ts.sys.write("TSFILE: " + filepath + ts.sys.newLine);
         }
     }
-    /**
-     * Checks to see if the locale is in the appropriate format,
-     * and if it is, attempts to set the appropriate language.
-     */
-    function validateLocaleAndSetLanguage(locale, errors) {
-        var matchResult = /^([a-z]+)([_\-]([a-z]+))?$/.exec(locale.toLowerCase());
-        if (!matchResult) {
-            errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Locale_must_be_of_the_form_language_or_language_territory_For_example_0_or_1, "en", "ja-jp"));
-            return false;
-        }
-        var language = matchResult[1];
-        var territory = matchResult[3];
-        // First try the entire locale, then fall back to just language if that's all we have.
-        // Either ways do not fail, and fallback to the English diagnostic strings.
-        if (!trySetLanguageAndTerritory(language, territory, errors)) {
-            trySetLanguageAndTerritory(language, undefined, errors);
-        }
-        return true;
-    }
-    function trySetLanguageAndTerritory(language, territory, errors) {
-        var compilerFilePath = ts.normalizePath(ts.sys.getExecutingFilePath());
-        var containingDirectoryPath = ts.getDirectoryPath(compilerFilePath);
-        var filePath = ts.combinePaths(containingDirectoryPath, language);
-        if (territory) {
-            filePath = filePath + "-" + territory;
-        }
-        filePath = ts.sys.resolvePath(ts.combinePaths(filePath, "diagnosticMessages.generated.json"));
-        if (!ts.sys.fileExists(filePath)) {
-            return false;
-        }
-        // TODO: Add codePage support for readFile?
-        var fileContents = "";
-        try {
-            fileContents = ts.sys.readFile(filePath);
-        }
-        catch (e) {
-            errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unable_to_open_file_0, filePath));
-            return false;
-        }
-        try {
-            ts.localizedDiagnosticMessages = JSON.parse(fileContents);
-        }
-        catch (e) {
-            errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Corrupted_locale_file_0, filePath));
-            return false;
-        }
-        return true;
-    }
     function countLines(program) {
         var count = 0;
         ts.forEach(program.getSourceFiles(), function (file) {
@@ -60406,10 +72762,10 @@ var ts;
         });
         return count;
     }
-    function getDiagnosticText(message) {
-        var args = [];
+    function getDiagnosticText(_message) {
+        var _args = [];
         for (var _i = 1; _i < arguments.length; _i++) {
-            args[_i - 1] = arguments[_i];
+            _args[_i - 1] = arguments[_i];
         }
         var diagnostic = ts.createCompilerDiagnostic.apply(undefined, arguments);
         return diagnostic.messageText;
@@ -60417,78 +72773,8 @@ var ts;
     function reportDiagnosticSimply(diagnostic, host) {
         ts.sys.write(ts.formatDiagnostics([diagnostic], host));
     }
-    var redForegroundEscapeSequence = "\u001b[91m";
-    var yellowForegroundEscapeSequence = "\u001b[93m";
-    var blueForegroundEscapeSequence = "\u001b[93m";
-    var gutterStyleSequence = "\u001b[100;30m";
-    var gutterSeparator = " ";
-    var resetEscapeSequence = "\u001b[0m";
-    var ellipsis = "...";
-    var categoryFormatMap = ts.createMap((_a = {},
-        _a[ts.DiagnosticCategory.Warning] = yellowForegroundEscapeSequence,
-        _a[ts.DiagnosticCategory.Error] = redForegroundEscapeSequence,
-        _a[ts.DiagnosticCategory.Message] = blueForegroundEscapeSequence,
-        _a));
-    function formatAndReset(text, formatStyle) {
-        return formatStyle + text + resetEscapeSequence;
-    }
     function reportDiagnosticWithColorAndContext(diagnostic, host) {
-        var output = "";
-        if (diagnostic.file) {
-            var start = diagnostic.start, length_4 = diagnostic.length, file = diagnostic.file;
-            var _a = ts.getLineAndCharacterOfPosition(file, start), firstLine = _a.line, firstLineChar = _a.character;
-            var _b = ts.getLineAndCharacterOfPosition(file, start + length_4), lastLine = _b.line, lastLineChar = _b.character;
-            var lastLineInFile = ts.getLineAndCharacterOfPosition(file, file.text.length).line;
-            var relativeFileName = host ? ts.convertToRelativePath(file.fileName, host.getCurrentDirectory(), function (fileName) { return host.getCanonicalFileName(fileName); }) : file.fileName;
-            var hasMoreThanFiveLines = (lastLine - firstLine) >= 4;
-            var gutterWidth = (lastLine + 1 + "").length;
-            if (hasMoreThanFiveLines) {
-                gutterWidth = Math.max(ellipsis.length, gutterWidth);
-            }
-            output += ts.sys.newLine;
-            for (var i = firstLine; i <= lastLine; i++) {
-                // If the error spans over 5 lines, we'll only show the first 2 and last 2 lines,
-                // so we'll skip ahead to the second-to-last line.
-                if (hasMoreThanFiveLines && firstLine + 1 < i && i < lastLine - 1) {
-                    output += formatAndReset(padLeft(ellipsis, gutterWidth), gutterStyleSequence) + gutterSeparator + ts.sys.newLine;
-                    i = lastLine - 1;
-                }
-                var lineStart = ts.getPositionOfLineAndCharacter(file, i, 0);
-                var lineEnd = i < lastLineInFile ? ts.getPositionOfLineAndCharacter(file, i + 1, 0) : file.text.length;
-                var lineContent = file.text.slice(lineStart, lineEnd);
-                lineContent = lineContent.replace(/\s+$/g, ""); // trim from end
-                lineContent = lineContent.replace("\t", " "); // convert tabs to single spaces
-                // Output the gutter and the actual contents of the line.
-                output += formatAndReset(padLeft(i + 1 + "", gutterWidth), gutterStyleSequence) + gutterSeparator;
-                output += lineContent + ts.sys.newLine;
-                // Output the gutter and the error span for the line using tildes.
-                output += formatAndReset(padLeft("", gutterWidth), gutterStyleSequence) + gutterSeparator;
-                output += redForegroundEscapeSequence;
-                if (i === firstLine) {
-                    // If we're on the last line, then limit it to the last character of the last line.
-                    // Otherwise, we'll just squiggle the rest of the line, giving 'slice' no end position.
-                    var lastCharForLine = i === lastLine ? lastLineChar : undefined;
-                    output += lineContent.slice(0, firstLineChar).replace(/\S/g, " ");
-                    output += lineContent.slice(firstLineChar, lastCharForLine).replace(/./g, "~");
-                }
-                else if (i === lastLine) {
-                    output += lineContent.slice(0, lastLineChar).replace(/./g, "~");
-                }
-                else {
-                    // Squiggle the entire line.
-                    output += lineContent.replace(/./g, "~");
-                }
-                output += resetEscapeSequence;
-                output += ts.sys.newLine;
-            }
-            output += ts.sys.newLine;
-            output += relativeFileName + "(" + (firstLine + 1) + "," + (firstLineChar + 1) + "): ";
-        }
-        var categoryColor = categoryFormatMap[diagnostic.category];
-        var category = ts.DiagnosticCategory[diagnostic.category].toLowerCase();
-        output += formatAndReset(category, categoryColor) + " TS" + diagnostic.code + ": " + ts.flattenDiagnosticMessageText(diagnostic.messageText, ts.sys.newLine);
-        output += ts.sys.newLine + ts.sys.newLine;
-        ts.sys.write(output);
+        ts.sys.write(ts.formatDiagnosticsWithColorAndContext([diagnostic], host) + ts.sys.newLine + ts.sys.newLine);
     }
     function reportWatchDiagnostic(diagnostic) {
         var output = new Date().toLocaleTimeString() + " - ";
@@ -60496,7 +72782,7 @@ var ts;
             var loc = ts.getLineAndCharacterOfPosition(diagnostic.file, diagnostic.start);
             output += diagnostic.file.fileName + "(" + (loc.line + 1) + "," + (loc.character + 1) + "): ";
         }
-        output += "" + ts.flattenDiagnosticMessageText(diagnostic.messageText, ts.sys.newLine) + ts.sys.newLine;
+        output += "" + ts.flattenDiagnosticMessageText(diagnostic.messageText, ts.sys.newLine) + (ts.sys.newLine + ts.sys.newLine + ts.sys.newLine);
         ts.sys.write(output);
     }
     function padLeft(s, length) {
@@ -60536,7 +72822,7 @@ var ts;
                 reportDiagnostic(ts.createCompilerDiagnostic(ts.Diagnostics.The_current_host_does_not_support_the_0_option, "--locale"), /* host */ undefined);
                 return ts.sys.exit(ts.ExitStatus.DiagnosticsPresent_OutputsSkipped);
             }
-            validateLocaleAndSetLanguage(commandLine.options.locale, commandLine.errors);
+            ts.validateLocaleAndSetLanguage(commandLine.options.locale, ts.sys, commandLine.errors);
         }
         // If there are any errors due to command line parsing and/or
         // setting up localization, report them and quit.
@@ -60552,9 +72838,9 @@ var ts;
             printVersion();
             return ts.sys.exit(ts.ExitStatus.Success);
         }
-        if (commandLine.options.help) {
+        if (commandLine.options.help || commandLine.options.all) {
             printVersion();
-            printHelp();
+            printHelp(commandLine.options.all);
             return ts.sys.exit(ts.ExitStatus.Success);
         }
         if (commandLine.options.project) {
@@ -60588,7 +72874,7 @@ var ts;
         }
         if (commandLine.fileNames.length === 0 && !configFileName) {
             printVersion();
-            printHelp();
+            printHelp(commandLine.options.all);
             return ts.sys.exit(ts.ExitStatus.Success);
         }
         if (ts.isWatchSet(commandLine.options)) {
@@ -60605,7 +72891,7 @@ var ts;
                 // When the configFileName is just "tsconfig.json", the watched directory should be
                 // the current directory; if there is a given "project" parameter, then the configFileName
                 // is an absolute file name.
-                directory == "" ? "." : directory, watchedDirectoryChanged, /*recursive*/ true);
+                directory === "" ? "." : directory, watchedDirectoryChanged, /*recursive*/ true);
             }
         }
         performCompilation();
@@ -60627,20 +72913,11 @@ var ts;
                 ts.sys.exit(ts.ExitStatus.DiagnosticsPresent_OutputsSkipped);
                 return;
             }
-            var result = ts.parseConfigFileTextToJson(configFileName, cachedConfigFileText);
-            var configObject = result.config;
-            if (!configObject) {
-                reportDiagnostics([result.error], /* compilerHost */ undefined);
-                ts.sys.exit(ts.ExitStatus.DiagnosticsPresent_OutputsSkipped);
-                return;
-            }
+            var result = ts.parseJsonText(configFileName, cachedConfigFileText);
+            reportDiagnostics(result.parseDiagnostics, /* compilerHost */ undefined);
             var cwd = ts.sys.getCurrentDirectory();
-            var configParseResult = ts.parseJsonConfigFileContent(configObject, ts.sys, ts.getNormalizedAbsolutePath(ts.getDirectoryPath(configFileName), cwd), commandLine.options, ts.getNormalizedAbsolutePath(configFileName, cwd));
-            if (configParseResult.errors.length > 0) {
-                reportDiagnostics(configParseResult.errors, /* compilerHost */ undefined);
-                ts.sys.exit(ts.ExitStatus.DiagnosticsPresent_OutputsSkipped);
-                return;
-            }
+            var configParseResult = ts.parseJsonSourceFileConfigFileContent(result, ts.sys, ts.getNormalizedAbsolutePath(ts.getDirectoryPath(configFileName), cwd), commandLine.options, ts.getNormalizedAbsolutePath(configFileName, cwd));
+            reportDiagnostics(configParseResult.errors, /* compilerHost */ undefined);
             if (ts.isWatchSet(configParseResult.options)) {
                 if (!ts.sys.watchFile) {
                     reportDiagnostic(ts.createCompilerDiagnostic(ts.Diagnostics.The_current_host_does_not_support_the_0_option, "--watch"), /* host */ undefined);
@@ -60652,9 +72929,8 @@ var ts;
                     // When the configFileName is just "tsconfig.json", the watched directory should be
                     // the current directory; if there is a given "project" parameter, then the configFileName
                     // is an absolute file name.
-                    directory == "" ? "." : directory, watchedDirectoryChanged, /*recursive*/ true);
+                    directory === "" ? "." : directory, watchedDirectoryChanged, /*recursive*/ true);
                 }
-                ;
             }
             return configParseResult;
         }
@@ -60689,9 +72965,11 @@ var ts;
             reportWatchDiagnostic(ts.createCompilerDiagnostic(ts.Diagnostics.Compilation_complete_Watching_for_file_changes));
         }
         function cachedFileExists(fileName) {
-            return fileName in cachedExistingFiles
-                ? cachedExistingFiles[fileName]
-                : cachedExistingFiles[fileName] = hostFileExists(fileName);
+            var fileExists = cachedExistingFiles.get(fileName);
+            if (fileExists === undefined) {
+                cachedExistingFiles.set(fileName, fileExists = hostFileExists(fileName));
+            }
+            return fileExists;
         }
         function getSourceFile(fileName, languageVersion, onError) {
             // Return existing SourceFile object if one is available
@@ -60706,7 +72984,7 @@ var ts;
             var sourceFile = hostGetSourceFile(fileName, languageVersion, onError);
             if (sourceFile && ts.isWatchSet(compilerOptions) && ts.sys.watchFile) {
                 // Attach a file watcher
-                sourceFile.fileWatcher = ts.sys.watchFile(sourceFile.fileName, function (fileName, removed) { return sourceFileChanged(sourceFile, removed); });
+                sourceFile.fileWatcher = ts.sys.watchFile(sourceFile.fileName, function (_fileName, removed) { return sourceFileChanged(sourceFile, removed); });
             }
             return sourceFile;
         }
@@ -60747,10 +73025,13 @@ var ts;
             startTimerForHandlingDirectoryChanges();
         }
         function startTimerForHandlingDirectoryChanges() {
+            if (!ts.sys.setTimeout || !ts.sys.clearTimeout) {
+                return;
+            }
             if (timerHandleForDirectoryChanges) {
-                clearTimeout(timerHandleForDirectoryChanges);
+                ts.sys.clearTimeout(timerHandleForDirectoryChanges);
             }
-            timerHandleForDirectoryChanges = setTimeout(directoryChangeHandler, 250);
+            timerHandleForDirectoryChanges = ts.sys.setTimeout(directoryChangeHandler, 250);
         }
         function directoryChangeHandler() {
             var parsedCommandLine = parseConfigFile();
@@ -60766,10 +73047,13 @@ var ts;
         // operations (such as saving all modified files in an editor) a chance to complete before we kick
         // off a new compilation.
         function startTimerForRecompilation() {
+            if (!ts.sys.setTimeout || !ts.sys.clearTimeout) {
+                return;
+            }
             if (timerHandleForRecompilation) {
-                clearTimeout(timerHandleForRecompilation);
+                ts.sys.clearTimeout(timerHandleForRecompilation);
             }
-            timerHandleForRecompilation = setTimeout(recompile, 250);
+            timerHandleForRecompilation = ts.sys.setTimeout(recompile, 250);
         }
         function recompile() {
             timerHandleForRecompilation = undefined;
@@ -60843,7 +73127,7 @@ var ts;
             var emitOutput = program.emit();
             diagnostics = diagnostics.concat(emitOutput.diagnostics);
             reportDiagnostics(ts.sortAndDeduplicateDiagnostics(diagnostics), compilerHost);
-            reportEmittedFiles(emitOutput.emittedFiles, compilerHost);
+            reportEmittedFiles(emitOutput.emittedFiles);
             if (emitOutput.emitSkipped && diagnostics.length > 0) {
                 // If the emitter didn't emit anything, then pass that value along.
                 return ts.ExitStatus.DiagnosticsPresent_OutputsSkipped;
@@ -60859,17 +73143,17 @@ var ts;
             var nameSize = 0;
             var valueSize = 0;
             for (var _i = 0, statistics_1 = statistics; _i < statistics_1.length; _i++) {
-                var _a = statistics_1[_i], name_47 = _a.name, value = _a.value;
-                if (name_47.length > nameSize) {
-                    nameSize = name_47.length;
+                var _a = statistics_1[_i], name_58 = _a.name, value = _a.value;
+                if (name_58.length > nameSize) {
+                    nameSize = name_58.length;
                 }
                 if (value.length > valueSize) {
                     valueSize = value.length;
                 }
             }
             for (var _b = 0, statistics_2 = statistics; _b < statistics_2.length; _b++) {
-                var _c = statistics_2[_b], name_48 = _c.name, value = _c.value;
-                ts.sys.write(padRight(name_48 + ":", nameSize + 2) + padLeft(value.toString(), valueSize) + ts.sys.newLine);
+                var _c = statistics_2[_b], name_59 = _c.name, value = _c.value;
+                ts.sys.write(padRight(name_59 + ":", nameSize + 2) + padLeft(value.toString(), valueSize) + ts.sys.newLine);
             }
         }
         function reportStatisticalValue(name, value) {
@@ -60885,7 +73169,7 @@ var ts;
     function printVersion() {
         ts.sys.write(getDiagnosticText(ts.Diagnostics.Version_0, ts.version) + ts.sys.newLine);
     }
-    function printHelp() {
+    function printHelp(showAllOptions) {
         var output = [];
         // We want to align our "syntax" and "examples" commands to a certain margin.
         var syntaxLength = getDiagnosticText(ts.Diagnostics.Syntax_Colon_0, "").length;
@@ -60904,8 +73188,9 @@ var ts;
         output.push(ts.sys.newLine);
         output.push(getDiagnosticText(ts.Diagnostics.Options_Colon) + ts.sys.newLine);
         // Sort our options by their names, (e.g. "--noImplicitAny" comes before "--watch")
-        var optsList = ts.filter(ts.optionDeclarations.slice(), function (v) { return !v.experimental; });
-        optsList.sort(function (a, b) { return ts.compareValues(a.name.toLowerCase(), b.name.toLowerCase()); });
+        var optsList = showAllOptions ?
+            ts.optionDeclarations.slice().sort(function (a, b) { return ts.compareValues(a.name.toLowerCase(), b.name.toLowerCase()); }) :
+            ts.filter(ts.optionDeclarations.slice(), function (v) { return v.showInSimplifiedHelpView; });
         // We want our descriptions to align at the same column in our output,
         // so we keep track of the longest option usage string.
         marginLength = 0;
@@ -60931,13 +73216,9 @@ var ts;
             var description = void 0;
             if (option.name === "lib") {
                 description = getDiagnosticText(option.description);
-                var options = [];
                 var element = option.element;
                 var typeMap = element.type;
-                for (var key in typeMap) {
-                    options.push("'" + key + "'");
-                }
-                optionsDescriptionMap[description] = options;
+                optionsDescriptionMap.set(description, ts.arrayFrom(typeMap.keys()).map(function (key) { return "'" + key + "'"; }));
             }
             else {
                 description = getDiagnosticText(option.description);
@@ -60955,7 +73236,7 @@ var ts;
         for (var i = 0; i < usageColumn.length; i++) {
             var usage = usageColumn[i];
             var description = descriptionColumn[i];
-            var kindsList = optionsDescriptionMap[description];
+            var kindsList = optionsDescriptionMap.get(description);
             output.push(usage + makePadding(marginLength - usage.length + 2) + description + ts.sys.newLine);
             if (kindsList) {
                 output.push(makePadding(marginLength + 4));
@@ -60988,13 +73269,15 @@ var ts;
             reportDiagnostic(ts.createCompilerDiagnostic(ts.Diagnostics.A_tsconfig_json_file_is_already_defined_at_Colon_0, file), /* host */ undefined);
         }
         else {
-            ts.sys.writeFile(file, JSON.stringify(ts.generateTSConfig(options, fileNames), undefined, 4));
+            ts.sys.writeFile(file, ts.generateTSConfig(options, fileNames, ts.sys.newLine));
             reportDiagnostic(ts.createCompilerDiagnostic(ts.Diagnostics.Successfully_created_a_tsconfig_json_file), /* host */ undefined);
         }
         return;
     }
-    var _a;
 })(ts || (ts = {}));
+if (ts.Debug.isDebugging) {
+    ts.Debug.enableDebugInfo();
+}
 if (ts.sys.tryEnableSourceMapsForHost && /^development$/i.test(ts.sys.getEnvironmentVariable("NODE_ENV"))) {
     ts.sys.tryEnableSourceMapsForHost();
 }
@@ -61008,12 +73291,14 @@ var ts;
                 this.text = text;
             }
             StringScriptSnapshot.prototype.getText = function (start, end) {
-                return this.text.substring(start, end);
+                return start === 0 && end === this.text.length
+                    ? this.text
+                    : this.text.substring(start, end);
             };
             StringScriptSnapshot.prototype.getLength = function () {
                 return this.text.length;
             };
-            StringScriptSnapshot.prototype.getChangeRange = function (oldSnapshot) {
+            StringScriptSnapshot.prototype.getChangeRange = function () {
                 // Text-based snapshots do not support incremental parsing. Return undefined
                 // to signal that to the caller.
                 return undefined;
@@ -61033,17 +73318,18 @@ var ts;
     ts.TextChange = TextChange;
     var HighlightSpanKind;
     (function (HighlightSpanKind) {
-        HighlightSpanKind.none = "none";
-        HighlightSpanKind.definition = "definition";
-        HighlightSpanKind.reference = "reference";
-        HighlightSpanKind.writtenReference = "writtenReference";
+        HighlightSpanKind["none"] = "none";
+        HighlightSpanKind["definition"] = "definition";
+        HighlightSpanKind["reference"] = "reference";
+        HighlightSpanKind["writtenReference"] = "writtenReference";
     })(HighlightSpanKind = ts.HighlightSpanKind || (ts.HighlightSpanKind = {}));
+    var IndentStyle;
     (function (IndentStyle) {
         IndentStyle[IndentStyle["None"] = 0] = "None";
         IndentStyle[IndentStyle["Block"] = 1] = "Block";
         IndentStyle[IndentStyle["Smart"] = 2] = "Smart";
-    })(ts.IndentStyle || (ts.IndentStyle = {}));
-    var IndentStyle = ts.IndentStyle;
+    })(IndentStyle = ts.IndentStyle || (ts.IndentStyle = {}));
+    var SymbolDisplayPartKind;
     (function (SymbolDisplayPartKind) {
         SymbolDisplayPartKind[SymbolDisplayPartKind["aliasName"] = 0] = "aliasName";
         SymbolDisplayPartKind[SymbolDisplayPartKind["className"] = 1] = "className";
@@ -61067,14 +73353,14 @@ var ts;
         SymbolDisplayPartKind[SymbolDisplayPartKind["enumMemberName"] = 19] = "enumMemberName";
         SymbolDisplayPartKind[SymbolDisplayPartKind["functionName"] = 20] = "functionName";
         SymbolDisplayPartKind[SymbolDisplayPartKind["regularExpressionLiteral"] = 21] = "regularExpressionLiteral";
-    })(ts.SymbolDisplayPartKind || (ts.SymbolDisplayPartKind = {}));
-    var SymbolDisplayPartKind = ts.SymbolDisplayPartKind;
+    })(SymbolDisplayPartKind = ts.SymbolDisplayPartKind || (ts.SymbolDisplayPartKind = {}));
+    var OutputFileType;
     (function (OutputFileType) {
         OutputFileType[OutputFileType["JavaScript"] = 0] = "JavaScript";
         OutputFileType[OutputFileType["SourceMap"] = 1] = "SourceMap";
         OutputFileType[OutputFileType["Declaration"] = 2] = "Declaration";
-    })(ts.OutputFileType || (ts.OutputFileType = {}));
-    var OutputFileType = ts.OutputFileType;
+    })(OutputFileType = ts.OutputFileType || (ts.OutputFileType = {}));
+    var EndOfLineState;
     (function (EndOfLineState) {
         EndOfLineState[EndOfLineState["None"] = 0] = "None";
         EndOfLineState[EndOfLineState["InMultiLineCommentTrivia"] = 1] = "InMultiLineCommentTrivia";
@@ -61083,8 +73369,8 @@ var ts;
         EndOfLineState[EndOfLineState["InTemplateHeadOrNoSubstitutionTemplate"] = 4] = "InTemplateHeadOrNoSubstitutionTemplate";
         EndOfLineState[EndOfLineState["InTemplateMiddleOrTail"] = 5] = "InTemplateMiddleOrTail";
         EndOfLineState[EndOfLineState["InTemplateSubstitutionPosition"] = 6] = "InTemplateSubstitutionPosition";
-    })(ts.EndOfLineState || (ts.EndOfLineState = {}));
-    var EndOfLineState = ts.EndOfLineState;
+    })(EndOfLineState = ts.EndOfLineState || (ts.EndOfLineState = {}));
+    var TokenClass;
     (function (TokenClass) {
         TokenClass[TokenClass["Punctuation"] = 0] = "Punctuation";
         TokenClass[TokenClass["Keyword"] = 1] = "Keyword";
@@ -61095,114 +73381,113 @@ var ts;
         TokenClass[TokenClass["NumberLiteral"] = 6] = "NumberLiteral";
         TokenClass[TokenClass["StringLiteral"] = 7] = "StringLiteral";
         TokenClass[TokenClass["RegExpLiteral"] = 8] = "RegExpLiteral";
-    })(ts.TokenClass || (ts.TokenClass = {}));
-    var TokenClass = ts.TokenClass;
-    // TODO: move these to enums
+    })(TokenClass = ts.TokenClass || (ts.TokenClass = {}));
     var ScriptElementKind;
     (function (ScriptElementKind) {
-        ScriptElementKind.unknown = "";
-        ScriptElementKind.warning = "warning";
+        ScriptElementKind["unknown"] = "";
+        ScriptElementKind["warning"] = "warning";
         /** predefined type (void) or keyword (class) */
-        ScriptElementKind.keyword = "keyword";
+        ScriptElementKind["keyword"] = "keyword";
         /** top level script node */
-        ScriptElementKind.scriptElement = "script";
+        ScriptElementKind["scriptElement"] = "script";
         /** module foo {} */
-        ScriptElementKind.moduleElement = "module";
+        ScriptElementKind["moduleElement"] = "module";
         /** class X {} */
-        ScriptElementKind.classElement = "class";
+        ScriptElementKind["classElement"] = "class";
         /** var x = class X {} */
-        ScriptElementKind.localClassElement = "local class";
+        ScriptElementKind["localClassElement"] = "local class";
         /** interface Y {} */
-        ScriptElementKind.interfaceElement = "interface";
+        ScriptElementKind["interfaceElement"] = "interface";
         /** type T = ... */
-        ScriptElementKind.typeElement = "type";
+        ScriptElementKind["typeElement"] = "type";
         /** enum E */
-        ScriptElementKind.enumElement = "enum";
-        // TODO: GH#9983
-        ScriptElementKind.enumMemberElement = "const";
+        ScriptElementKind["enumElement"] = "enum";
+        ScriptElementKind["enumMemberElement"] = "enum member";
         /**
          * Inside module and script only
          * const v = ..
          */
-        ScriptElementKind.variableElement = "var";
+        ScriptElementKind["variableElement"] = "var";
         /** Inside function */
-        ScriptElementKind.localVariableElement = "local var";
+        ScriptElementKind["localVariableElement"] = "local var";
         /**
          * Inside module and script only
          * function f() { }
          */
-        ScriptElementKind.functionElement = "function";
+        ScriptElementKind["functionElement"] = "function";
         /** Inside function */
-        ScriptElementKind.localFunctionElement = "local function";
+        ScriptElementKind["localFunctionElement"] = "local function";
         /** class X { [public|private]* foo() {} } */
-        ScriptElementKind.memberFunctionElement = "method";
+        ScriptElementKind["memberFunctionElement"] = "method";
         /** class X { [public|private]* [get|set] foo:number; } */
-        ScriptElementKind.memberGetAccessorElement = "getter";
-        ScriptElementKind.memberSetAccessorElement = "setter";
+        ScriptElementKind["memberGetAccessorElement"] = "getter";
+        ScriptElementKind["memberSetAccessorElement"] = "setter";
         /**
          * class X { [public|private]* foo:number; }
          * interface Y { foo:number; }
          */
-        ScriptElementKind.memberVariableElement = "property";
+        ScriptElementKind["memberVariableElement"] = "property";
         /** class X { constructor() { } } */
-        ScriptElementKind.constructorImplementationElement = "constructor";
+        ScriptElementKind["constructorImplementationElement"] = "constructor";
         /** interface Y { ():number; } */
-        ScriptElementKind.callSignatureElement = "call";
+        ScriptElementKind["callSignatureElement"] = "call";
         /** interface Y { []:number; } */
-        ScriptElementKind.indexSignatureElement = "index";
+        ScriptElementKind["indexSignatureElement"] = "index";
         /** interface Y { new():Y; } */
-        ScriptElementKind.constructSignatureElement = "construct";
+        ScriptElementKind["constructSignatureElement"] = "construct";
         /** function foo(*Y*: string) */
-        ScriptElementKind.parameterElement = "parameter";
-        ScriptElementKind.typeParameterElement = "type parameter";
-        ScriptElementKind.primitiveType = "primitive type";
-        ScriptElementKind.label = "label";
-        ScriptElementKind.alias = "alias";
-        ScriptElementKind.constElement = "const";
-        ScriptElementKind.letElement = "let";
-        ScriptElementKind.directory = "directory";
-        ScriptElementKind.externalModuleName = "external module name";
+        ScriptElementKind["parameterElement"] = "parameter";
+        ScriptElementKind["typeParameterElement"] = "type parameter";
+        ScriptElementKind["primitiveType"] = "primitive type";
+        ScriptElementKind["label"] = "label";
+        ScriptElementKind["alias"] = "alias";
+        ScriptElementKind["constElement"] = "const";
+        ScriptElementKind["letElement"] = "let";
+        ScriptElementKind["directory"] = "directory";
+        ScriptElementKind["externalModuleName"] = "external module name";
+        /**
+         * <JsxTagName attribute1 attribute2={0} />
+         */
+        ScriptElementKind["jsxAttribute"] = "JSX attribute";
     })(ScriptElementKind = ts.ScriptElementKind || (ts.ScriptElementKind = {}));
     var ScriptElementKindModifier;
     (function (ScriptElementKindModifier) {
-        ScriptElementKindModifier.none = "";
-        ScriptElementKindModifier.publicMemberModifier = "public";
-        ScriptElementKindModifier.privateMemberModifier = "private";
-        ScriptElementKindModifier.protectedMemberModifier = "protected";
-        ScriptElementKindModifier.exportedModifier = "export";
-        ScriptElementKindModifier.ambientModifier = "declare";
-        ScriptElementKindModifier.staticModifier = "static";
-        ScriptElementKindModifier.abstractModifier = "abstract";
+        ScriptElementKindModifier["none"] = "";
+        ScriptElementKindModifier["publicMemberModifier"] = "public";
+        ScriptElementKindModifier["privateMemberModifier"] = "private";
+        ScriptElementKindModifier["protectedMemberModifier"] = "protected";
+        ScriptElementKindModifier["exportedModifier"] = "export";
+        ScriptElementKindModifier["ambientModifier"] = "declare";
+        ScriptElementKindModifier["staticModifier"] = "static";
+        ScriptElementKindModifier["abstractModifier"] = "abstract";
     })(ScriptElementKindModifier = ts.ScriptElementKindModifier || (ts.ScriptElementKindModifier = {}));
-    var ClassificationTypeNames = (function () {
-        function ClassificationTypeNames() {
-        }
-        return ClassificationTypeNames;
-    }());
-    ClassificationTypeNames.comment = "comment";
-    ClassificationTypeNames.identifier = "identifier";
-    ClassificationTypeNames.keyword = "keyword";
-    ClassificationTypeNames.numericLiteral = "number";
-    ClassificationTypeNames.operator = "operator";
-    ClassificationTypeNames.stringLiteral = "string";
-    ClassificationTypeNames.whiteSpace = "whitespace";
-    ClassificationTypeNames.text = "text";
-    ClassificationTypeNames.punctuation = "punctuation";
-    ClassificationTypeNames.className = "class name";
-    ClassificationTypeNames.enumName = "enum name";
-    ClassificationTypeNames.interfaceName = "interface name";
-    ClassificationTypeNames.moduleName = "module name";
-    ClassificationTypeNames.typeParameterName = "type parameter name";
-    ClassificationTypeNames.typeAliasName = "type alias name";
-    ClassificationTypeNames.parameterName = "parameter name";
-    ClassificationTypeNames.docCommentTagName = "doc comment tag name";
-    ClassificationTypeNames.jsxOpenTagName = "jsx open tag name";
-    ClassificationTypeNames.jsxCloseTagName = "jsx close tag name";
-    ClassificationTypeNames.jsxSelfClosingTagName = "jsx self closing tag name";
-    ClassificationTypeNames.jsxAttribute = "jsx attribute";
-    ClassificationTypeNames.jsxText = "jsx text";
-    ClassificationTypeNames.jsxAttributeStringLiteralValue = "jsx attribute string literal value";
-    ts.ClassificationTypeNames = ClassificationTypeNames;
+    var ClassificationTypeNames;
+    (function (ClassificationTypeNames) {
+        ClassificationTypeNames["comment"] = "comment";
+        ClassificationTypeNames["identifier"] = "identifier";
+        ClassificationTypeNames["keyword"] = "keyword";
+        ClassificationTypeNames["numericLiteral"] = "number";
+        ClassificationTypeNames["operator"] = "operator";
+        ClassificationTypeNames["stringLiteral"] = "string";
+        ClassificationTypeNames["whiteSpace"] = "whitespace";
+        ClassificationTypeNames["text"] = "text";
+        ClassificationTypeNames["punctuation"] = "punctuation";
+        ClassificationTypeNames["className"] = "class name";
+        ClassificationTypeNames["enumName"] = "enum name";
+        ClassificationTypeNames["interfaceName"] = "interface name";
+        ClassificationTypeNames["moduleName"] = "module name";
+        ClassificationTypeNames["typeParameterName"] = "type parameter name";
+        ClassificationTypeNames["typeAliasName"] = "type alias name";
+        ClassificationTypeNames["parameterName"] = "parameter name";
+        ClassificationTypeNames["docCommentTagName"] = "doc comment tag name";
+        ClassificationTypeNames["jsxOpenTagName"] = "jsx open tag name";
+        ClassificationTypeNames["jsxCloseTagName"] = "jsx close tag name";
+        ClassificationTypeNames["jsxSelfClosingTagName"] = "jsx self closing tag name";
+        ClassificationTypeNames["jsxAttribute"] = "jsx attribute";
+        ClassificationTypeNames["jsxText"] = "jsx text";
+        ClassificationTypeNames["jsxAttributeStringLiteralValue"] = "jsx attribute string literal value";
+    })(ClassificationTypeNames = ts.ClassificationTypeNames || (ts.ClassificationTypeNames = {}));
+    var ClassificationType;
     (function (ClassificationType) {
         ClassificationType[ClassificationType["comment"] = 1] = "comment";
         ClassificationType[ClassificationType["identifier"] = 2] = "identifier";
@@ -61228,52 +73513,54 @@ var ts;
         ClassificationType[ClassificationType["jsxAttribute"] = 22] = "jsxAttribute";
         ClassificationType[ClassificationType["jsxText"] = 23] = "jsxText";
         ClassificationType[ClassificationType["jsxAttributeStringLiteralValue"] = 24] = "jsxAttributeStringLiteralValue";
-    })(ts.ClassificationType || (ts.ClassificationType = {}));
-    var ClassificationType = ts.ClassificationType;
+    })(ClassificationType = ts.ClassificationType || (ts.ClassificationType = {}));
 })(ts || (ts = {}));
 // These utilities are common to multiple language service features.
 /* @internal */
 var ts;
 (function (ts) {
-    ts.scanner = ts.createScanner(2 /* Latest */, /*skipTrivia*/ true);
+    ts.scanner = ts.createScanner(5 /* Latest */, /*skipTrivia*/ true);
     ts.emptyArray = [];
+    var SemanticMeaning;
     (function (SemanticMeaning) {
         SemanticMeaning[SemanticMeaning["None"] = 0] = "None";
         SemanticMeaning[SemanticMeaning["Value"] = 1] = "Value";
         SemanticMeaning[SemanticMeaning["Type"] = 2] = "Type";
         SemanticMeaning[SemanticMeaning["Namespace"] = 4] = "Namespace";
         SemanticMeaning[SemanticMeaning["All"] = 7] = "All";
-    })(ts.SemanticMeaning || (ts.SemanticMeaning = {}));
-    var SemanticMeaning = ts.SemanticMeaning;
+    })(SemanticMeaning = ts.SemanticMeaning || (ts.SemanticMeaning = {}));
     function getMeaningFromDeclaration(node) {
         switch (node.kind) {
-            case 142 /* Parameter */:
-            case 218 /* VariableDeclaration */:
-            case 169 /* BindingElement */:
-            case 145 /* PropertyDeclaration */:
-            case 144 /* PropertySignature */:
-            case 253 /* PropertyAssignment */:
-            case 254 /* ShorthandPropertyAssignment */:
-            case 255 /* EnumMember */:
-            case 147 /* MethodDeclaration */:
-            case 146 /* MethodSignature */:
-            case 148 /* Constructor */:
-            case 149 /* GetAccessor */:
-            case 150 /* SetAccessor */:
-            case 220 /* FunctionDeclaration */:
-            case 179 /* FunctionExpression */:
-            case 180 /* ArrowFunction */:
-            case 252 /* CatchClause */:
+            case 146 /* Parameter */:
+            case 226 /* VariableDeclaration */:
+            case 176 /* BindingElement */:
+            case 149 /* PropertyDeclaration */:
+            case 148 /* PropertySignature */:
+            case 261 /* PropertyAssignment */:
+            case 262 /* ShorthandPropertyAssignment */:
+            case 151 /* MethodDeclaration */:
+            case 150 /* MethodSignature */:
+            case 152 /* Constructor */:
+            case 153 /* GetAccessor */:
+            case 154 /* SetAccessor */:
+            case 228 /* FunctionDeclaration */:
+            case 186 /* FunctionExpression */:
+            case 187 /* ArrowFunction */:
+            case 260 /* CatchClause */:
+            case 253 /* JsxAttribute */:
                 return 1 /* Value */;
-            case 141 /* TypeParameter */:
-            case 222 /* InterfaceDeclaration */:
-            case 223 /* TypeAliasDeclaration */:
-            case 159 /* TypeLiteral */:
+            case 145 /* TypeParameter */:
+            case 230 /* InterfaceDeclaration */:
+            case 231 /* TypeAliasDeclaration */:
+            case 163 /* TypeLiteral */:
                 return 2 /* Type */;
-            case 221 /* ClassDeclaration */:
-            case 224 /* EnumDeclaration */:
+            case 291 /* JSDocTypedefTag */:
+                // If it has no name node, it shares the name with the value declaration below it.
+                return node.name === undefined ? 1 /* Value */ | 2 /* Type */ : 2 /* Type */;
+            case 264 /* EnumMember */:
+            case 229 /* ClassDeclaration */:
                 return 1 /* Value */ | 2 /* Type */;
-            case 225 /* ModuleDeclaration */:
+            case 233 /* ModuleDeclaration */:
                 if (ts.isAmbientModule(node)) {
                     return 4 /* Namespace */ | 1 /* Value */;
                 }
@@ -61283,25 +73570,29 @@ var ts;
                 else {
                     return 4 /* Namespace */;
                 }
-            case 233 /* NamedImports */:
-            case 234 /* ImportSpecifier */:
-            case 229 /* ImportEqualsDeclaration */:
-            case 230 /* ImportDeclaration */:
-            case 235 /* ExportAssignment */:
-            case 236 /* ExportDeclaration */:
-                return 1 /* Value */ | 2 /* Type */ | 4 /* Namespace */;
+            case 232 /* EnumDeclaration */:
+            case 241 /* NamedImports */:
+            case 242 /* ImportSpecifier */:
+            case 237 /* ImportEqualsDeclaration */:
+            case 238 /* ImportDeclaration */:
+            case 243 /* ExportAssignment */:
+            case 244 /* ExportDeclaration */:
+                return 7 /* All */;
             // An external module can be a Value
-            case 256 /* SourceFile */:
+            case 265 /* SourceFile */:
                 return 4 /* Namespace */ | 1 /* Value */;
         }
-        return 1 /* Value */ | 2 /* Type */ | 4 /* Namespace */;
+        return 7 /* All */;
     }
     ts.getMeaningFromDeclaration = getMeaningFromDeclaration;
     function getMeaningFromLocation(node) {
-        if (node.parent.kind === 235 /* ExportAssignment */) {
-            return 1 /* Value */ | 2 /* Type */ | 4 /* Namespace */;
+        if (node.kind === 265 /* SourceFile */) {
+            return 1 /* Value */;
+        }
+        else if (node.parent.kind === 243 /* ExportAssignment */) {
+            return 7 /* All */;
         }
-        else if (isInRightSideOfImport(node)) {
+        else if (isInRightSideOfInternalImportEqualsDeclaration(node)) {
             return getMeaningFromRightHandSideOfImportEquals(node);
         }
         else if (ts.isDeclarationName(node)) {
@@ -61313,56 +73604,61 @@ var ts;
         else if (isNamespaceReference(node)) {
             return 4 /* Namespace */;
         }
+        else if (ts.isTypeParameterDeclaration(node.parent)) {
+            ts.Debug.assert(ts.isJSDocTemplateTag(node.parent.parent)); // Else would be handled by isDeclarationName
+            return 2 /* Type */;
+        }
         else {
             return 1 /* Value */;
         }
     }
     ts.getMeaningFromLocation = getMeaningFromLocation;
     function getMeaningFromRightHandSideOfImportEquals(node) {
-        ts.Debug.assert(node.kind === 69 /* Identifier */);
+        ts.Debug.assert(node.kind === 71 /* Identifier */);
         //     import a = |b|; // Namespace
         //     import a = |b.c|; // Value, type, namespace
         //     import a = |b.c|.d; // Namespace
-        if (node.parent.kind === 139 /* QualifiedName */ &&
+        if (node.parent.kind === 143 /* QualifiedName */ &&
             node.parent.right === node &&
-            node.parent.parent.kind === 229 /* ImportEqualsDeclaration */) {
+            node.parent.parent.kind === 237 /* ImportEqualsDeclaration */) {
             return 1 /* Value */ | 2 /* Type */ | 4 /* Namespace */;
         }
         return 4 /* Namespace */;
     }
-    function isInRightSideOfImport(node) {
-        while (node.parent.kind === 139 /* QualifiedName */) {
+    function isInRightSideOfInternalImportEqualsDeclaration(node) {
+        while (node.parent.kind === 143 /* QualifiedName */) {
             node = node.parent;
         }
         return ts.isInternalModuleImportEqualsDeclaration(node.parent) && node.parent.moduleReference === node;
     }
+    ts.isInRightSideOfInternalImportEqualsDeclaration = isInRightSideOfInternalImportEqualsDeclaration;
     function isNamespaceReference(node) {
         return isQualifiedNameNamespaceReference(node) || isPropertyAccessNamespaceReference(node);
     }
     function isQualifiedNameNamespaceReference(node) {
         var root = node;
         var isLastClause = true;
-        if (root.parent.kind === 139 /* QualifiedName */) {
-            while (root.parent && root.parent.kind === 139 /* QualifiedName */) {
+        if (root.parent.kind === 143 /* QualifiedName */) {
+            while (root.parent && root.parent.kind === 143 /* QualifiedName */) {
                 root = root.parent;
             }
             isLastClause = root.right === node;
         }
-        return root.parent.kind === 155 /* TypeReference */ && !isLastClause;
+        return root.parent.kind === 159 /* TypeReference */ && !isLastClause;
     }
     function isPropertyAccessNamespaceReference(node) {
         var root = node;
         var isLastClause = true;
-        if (root.parent.kind === 172 /* PropertyAccessExpression */) {
-            while (root.parent && root.parent.kind === 172 /* PropertyAccessExpression */) {
+        if (root.parent.kind === 179 /* PropertyAccessExpression */) {
+            while (root.parent && root.parent.kind === 179 /* PropertyAccessExpression */) {
                 root = root.parent;
             }
             isLastClause = root.name === node;
         }
-        if (!isLastClause && root.parent.kind === 194 /* ExpressionWithTypeArguments */ && root.parent.parent.kind === 251 /* HeritageClause */) {
+        if (!isLastClause && root.parent.kind === 201 /* ExpressionWithTypeArguments */ && root.parent.parent.kind === 259 /* HeritageClause */) {
             var decl = root.parent.parent.parent;
-            return (decl.kind === 221 /* ClassDeclaration */ && root.parent.parent.token === 106 /* ImplementsKeyword */) ||
-                (decl.kind === 222 /* InterfaceDeclaration */ && root.parent.parent.token === 83 /* ExtendsKeyword */);
+            return (decl.kind === 229 /* ClassDeclaration */ && root.parent.parent.token === 108 /* ImplementsKeyword */) ||
+                (decl.kind === 230 /* InterfaceDeclaration */ && root.parent.parent.token === 85 /* ExtendsKeyword */);
         }
         return false;
     }
@@ -61370,17 +73666,27 @@ var ts;
         if (ts.isRightSideOfQualifiedNameOrPropertyAccess(node)) {
             node = node.parent;
         }
-        return node.parent.kind === 155 /* TypeReference */ ||
-            (node.parent.kind === 194 /* ExpressionWithTypeArguments */ && !ts.isExpressionWithTypeArgumentsInClassExtendsClause(node.parent)) ||
-            (node.kind === 97 /* ThisKeyword */ && !ts.isPartOfExpression(node)) ||
-            node.kind === 165 /* ThisType */;
+        switch (node.kind) {
+            case 99 /* ThisKeyword */:
+                return !ts.isPartOfExpression(node);
+            case 169 /* ThisType */:
+                return true;
+        }
+        switch (node.parent.kind) {
+            case 159 /* TypeReference */:
+            case 277 /* JSDocTypeReference */:
+                return true;
+            case 201 /* ExpressionWithTypeArguments */:
+                return !ts.isExpressionWithTypeArgumentsInClassExtendsClause(node.parent);
+        }
+        return false;
     }
     function isCallExpressionTarget(node) {
-        return isCallOrNewExpressionTarget(node, 174 /* CallExpression */);
+        return isCallOrNewExpressionTarget(node, 181 /* CallExpression */);
     }
     ts.isCallExpressionTarget = isCallExpressionTarget;
     function isNewExpressionTarget(node) {
-        return isCallOrNewExpressionTarget(node, 175 /* NewExpression */);
+        return isCallOrNewExpressionTarget(node, 182 /* NewExpression */);
     }
     ts.isNewExpressionTarget = isNewExpressionTarget;
     function isCallOrNewExpressionTarget(node, kind) {
@@ -61393,7 +73699,7 @@ var ts;
     ts.climbPastPropertyAccess = climbPastPropertyAccess;
     function getTargetLabel(referenceNode, labelName) {
         while (referenceNode) {
-            if (referenceNode.kind === 214 /* LabeledStatement */ && referenceNode.label.text === labelName) {
+            if (referenceNode.kind === 222 /* LabeledStatement */ && referenceNode.label.text === labelName) {
                 return referenceNode.label;
             }
             referenceNode = referenceNode.parent;
@@ -61402,14 +73708,14 @@ var ts;
     }
     ts.getTargetLabel = getTargetLabel;
     function isJumpStatementTarget(node) {
-        return node.kind === 69 /* Identifier */ &&
-            (node.parent.kind === 210 /* BreakStatement */ || node.parent.kind === 209 /* ContinueStatement */) &&
+        return node.kind === 71 /* Identifier */ &&
+            (node.parent.kind === 218 /* BreakStatement */ || node.parent.kind === 217 /* ContinueStatement */) &&
             node.parent.label === node;
     }
     ts.isJumpStatementTarget = isJumpStatementTarget;
     function isLabelOfLabeledStatement(node) {
-        return node.kind === 69 /* Identifier */ &&
-            node.parent.kind === 214 /* LabeledStatement */ &&
+        return node.kind === 71 /* Identifier */ &&
+            node.parent.kind === 222 /* LabeledStatement */ &&
             node.parent.label === node;
     }
     function isLabelName(node) {
@@ -61417,38 +73723,38 @@ var ts;
     }
     ts.isLabelName = isLabelName;
     function isRightSideOfQualifiedName(node) {
-        return node.parent.kind === 139 /* QualifiedName */ && node.parent.right === node;
+        return node.parent.kind === 143 /* QualifiedName */ && node.parent.right === node;
     }
     ts.isRightSideOfQualifiedName = isRightSideOfQualifiedName;
     function isRightSideOfPropertyAccess(node) {
-        return node && node.parent && node.parent.kind === 172 /* PropertyAccessExpression */ && node.parent.name === node;
+        return node && node.parent && node.parent.kind === 179 /* PropertyAccessExpression */ && node.parent.name === node;
     }
     ts.isRightSideOfPropertyAccess = isRightSideOfPropertyAccess;
     function isNameOfModuleDeclaration(node) {
-        return node.parent.kind === 225 /* ModuleDeclaration */ && node.parent.name === node;
+        return node.parent.kind === 233 /* ModuleDeclaration */ && node.parent.name === node;
     }
     ts.isNameOfModuleDeclaration = isNameOfModuleDeclaration;
     function isNameOfFunctionDeclaration(node) {
-        return node.kind === 69 /* Identifier */ &&
+        return node.kind === 71 /* Identifier */ &&
             ts.isFunctionLike(node.parent) && node.parent.name === node;
     }
     ts.isNameOfFunctionDeclaration = isNameOfFunctionDeclaration;
     function isLiteralNameOfPropertyDeclarationOrIndexAccess(node) {
         if (node.kind === 9 /* StringLiteral */ || node.kind === 8 /* NumericLiteral */) {
             switch (node.parent.kind) {
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
-                case 253 /* PropertyAssignment */:
-                case 255 /* EnumMember */:
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                case 225 /* ModuleDeclaration */:
-                    return node.parent.name === node;
-                case 173 /* ElementAccessExpression */:
+                case 149 /* PropertyDeclaration */:
+                case 148 /* PropertySignature */:
+                case 261 /* PropertyAssignment */:
+                case 264 /* EnumMember */:
+                case 151 /* MethodDeclaration */:
+                case 150 /* MethodSignature */:
+                case 153 /* GetAccessor */:
+                case 154 /* SetAccessor */:
+                case 233 /* ModuleDeclaration */:
+                    return ts.getNameOfDeclaration(node.parent) === node;
+                case 180 /* ElementAccessExpression */:
                     return node.parent.argumentExpression === node;
-                case 140 /* ComputedPropertyName */:
+                case 144 /* ComputedPropertyName */:
                     return true;
             }
         }
@@ -61460,36 +73766,6 @@ var ts;
             ts.getExternalModuleImportEqualsDeclarationExpression(node.parent.parent) === node;
     }
     ts.isExpressionOfExternalModuleImportEqualsDeclaration = isExpressionOfExternalModuleImportEqualsDeclaration;
-    /** Returns true if the position is within a comment */
-    function isInsideComment(sourceFile, token, position) {
-        // The position has to be: 1. in the leading trivia (before token.getStart()), and 2. within a comment
-        return position <= token.getStart(sourceFile) &&
-            (isInsideCommentRange(ts.getTrailingCommentRanges(sourceFile.text, token.getFullStart())) ||
-                isInsideCommentRange(ts.getLeadingCommentRanges(sourceFile.text, token.getFullStart())));
-        function isInsideCommentRange(comments) {
-            return ts.forEach(comments, function (comment) {
-                // either we are 1. completely inside the comment, or 2. at the end of the comment
-                if (comment.pos < position && position < comment.end) {
-                    return true;
-                }
-                else if (position === comment.end) {
-                    var text = sourceFile.text;
-                    var width = comment.end - comment.pos;
-                    // is single line comment or just /*
-                    if (width <= 2 || text.charCodeAt(comment.pos + 1) === 47 /* slash */) {
-                        return true;
-                    }
-                    else {
-                        // is unterminated multi-line comment
-                        return !(text.charCodeAt(comment.end - 1) === 47 /* slash */ &&
-                            text.charCodeAt(comment.end - 2) === 42 /* asterisk */);
-                    }
-                }
-                return false;
-            });
-        }
-    }
-    ts.isInsideComment = isInsideComment;
     function getContainerNode(node) {
         while (true) {
             node = node.parent;
@@ -61497,17 +73773,17 @@ var ts;
                 return undefined;
             }
             switch (node.kind) {
-                case 256 /* SourceFile */:
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                case 220 /* FunctionDeclaration */:
-                case 179 /* FunctionExpression */:
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                case 221 /* ClassDeclaration */:
-                case 222 /* InterfaceDeclaration */:
-                case 224 /* EnumDeclaration */:
-                case 225 /* ModuleDeclaration */:
+                case 265 /* SourceFile */:
+                case 151 /* MethodDeclaration */:
+                case 150 /* MethodSignature */:
+                case 228 /* FunctionDeclaration */:
+                case 186 /* FunctionExpression */:
+                case 153 /* GetAccessor */:
+                case 154 /* SetAccessor */:
+                case 229 /* ClassDeclaration */:
+                case 230 /* InterfaceDeclaration */:
+                case 232 /* EnumDeclaration */:
+                case 233 /* ModuleDeclaration */:
                     return node;
             }
         }
@@ -61515,76 +73791,67 @@ var ts;
     ts.getContainerNode = getContainerNode;
     function getNodeKind(node) {
         switch (node.kind) {
-            case 256 /* SourceFile */:
-                return ts.isExternalModule(node) ? ts.ScriptElementKind.moduleElement : ts.ScriptElementKind.scriptElement;
-            case 225 /* ModuleDeclaration */:
-                return ts.ScriptElementKind.moduleElement;
-            case 221 /* ClassDeclaration */:
-            case 192 /* ClassExpression */:
-                return ts.ScriptElementKind.classElement;
-            case 222 /* InterfaceDeclaration */: return ts.ScriptElementKind.interfaceElement;
-            case 223 /* TypeAliasDeclaration */: return ts.ScriptElementKind.typeElement;
-            case 224 /* EnumDeclaration */: return ts.ScriptElementKind.enumElement;
-            case 218 /* VariableDeclaration */:
+            case 265 /* SourceFile */:
+                return ts.isExternalModule(node) ? "module" /* moduleElement */ : "script" /* scriptElement */;
+            case 233 /* ModuleDeclaration */:
+                return "module" /* moduleElement */;
+            case 229 /* ClassDeclaration */:
+            case 199 /* ClassExpression */:
+                return "class" /* classElement */;
+            case 230 /* InterfaceDeclaration */: return "interface" /* interfaceElement */;
+            case 231 /* TypeAliasDeclaration */: return "type" /* typeElement */;
+            case 232 /* EnumDeclaration */: return "enum" /* enumElement */;
+            case 226 /* VariableDeclaration */:
                 return getKindOfVariableDeclaration(node);
-            case 169 /* BindingElement */:
+            case 176 /* BindingElement */:
                 return getKindOfVariableDeclaration(ts.getRootDeclaration(node));
-            case 180 /* ArrowFunction */:
-            case 220 /* FunctionDeclaration */:
-            case 179 /* FunctionExpression */:
-                return ts.ScriptElementKind.functionElement;
-            case 149 /* GetAccessor */: return ts.ScriptElementKind.memberGetAccessorElement;
-            case 150 /* SetAccessor */: return ts.ScriptElementKind.memberSetAccessorElement;
-            case 147 /* MethodDeclaration */:
-            case 146 /* MethodSignature */:
-                return ts.ScriptElementKind.memberFunctionElement;
-            case 145 /* PropertyDeclaration */:
-            case 144 /* PropertySignature */:
-                return ts.ScriptElementKind.memberVariableElement;
-            case 153 /* IndexSignature */: return ts.ScriptElementKind.indexSignatureElement;
-            case 152 /* ConstructSignature */: return ts.ScriptElementKind.constructSignatureElement;
-            case 151 /* CallSignature */: return ts.ScriptElementKind.callSignatureElement;
-            case 148 /* Constructor */: return ts.ScriptElementKind.constructorImplementationElement;
-            case 141 /* TypeParameter */: return ts.ScriptElementKind.typeParameterElement;
-            case 255 /* EnumMember */: return ts.ScriptElementKind.enumMemberElement;
-            case 142 /* Parameter */: return ts.hasModifier(node, 92 /* ParameterPropertyModifier */) ? ts.ScriptElementKind.memberVariableElement : ts.ScriptElementKind.parameterElement;
-            case 229 /* ImportEqualsDeclaration */:
-            case 234 /* ImportSpecifier */:
-            case 231 /* ImportClause */:
-            case 238 /* ExportSpecifier */:
-            case 232 /* NamespaceImport */:
-                return ts.ScriptElementKind.alias;
-            case 279 /* JSDocTypedefTag */:
-                return ts.ScriptElementKind.typeElement;
+            case 187 /* ArrowFunction */:
+            case 228 /* FunctionDeclaration */:
+            case 186 /* FunctionExpression */:
+                return "function" /* functionElement */;
+            case 153 /* GetAccessor */: return "getter" /* memberGetAccessorElement */;
+            case 154 /* SetAccessor */: return "setter" /* memberSetAccessorElement */;
+            case 151 /* MethodDeclaration */:
+            case 150 /* MethodSignature */:
+                return "method" /* memberFunctionElement */;
+            case 149 /* PropertyDeclaration */:
+            case 148 /* PropertySignature */:
+                return "property" /* memberVariableElement */;
+            case 157 /* IndexSignature */: return "index" /* indexSignatureElement */;
+            case 156 /* ConstructSignature */: return "construct" /* constructSignatureElement */;
+            case 155 /* CallSignature */: return "call" /* callSignatureElement */;
+            case 152 /* Constructor */: return "constructor" /* constructorImplementationElement */;
+            case 145 /* TypeParameter */: return "type parameter" /* typeParameterElement */;
+            case 264 /* EnumMember */: return "enum member" /* enumMemberElement */;
+            case 146 /* Parameter */: return ts.hasModifier(node, 92 /* ParameterPropertyModifier */) ? "property" /* memberVariableElement */ : "parameter" /* parameterElement */;
+            case 237 /* ImportEqualsDeclaration */:
+            case 242 /* ImportSpecifier */:
+            case 239 /* ImportClause */:
+            case 246 /* ExportSpecifier */:
+            case 240 /* NamespaceImport */:
+                return "alias" /* alias */;
+            case 291 /* JSDocTypedefTag */:
+                return "type" /* typeElement */;
             default:
-                return ts.ScriptElementKind.unknown;
+                return "" /* unknown */;
         }
         function getKindOfVariableDeclaration(v) {
             return ts.isConst(v)
-                ? ts.ScriptElementKind.constElement
+                ? "const" /* constElement */
                 : ts.isLet(v)
-                    ? ts.ScriptElementKind.letElement
-                    : ts.ScriptElementKind.variableElement;
+                    ? "let" /* letElement */
+                    : "var" /* variableElement */;
         }
     }
     ts.getNodeKind = getNodeKind;
-    function getStringLiteralTypeForNode(node, typeChecker) {
-        var searchNode = node.parent.kind === 166 /* LiteralType */ ? node.parent : node;
-        var type = typeChecker.getTypeAtLocation(searchNode);
-        if (type && type.flags & 32 /* StringLiteral */) {
-            return type;
-        }
-        return undefined;
-    }
-    ts.getStringLiteralTypeForNode = getStringLiteralTypeForNode;
     function isThis(node) {
         switch (node.kind) {
-            case 97 /* ThisKeyword */:
+            case 99 /* ThisKeyword */:
                 // case SyntaxKind.ThisType: TODO: GH#9267
                 return true;
-            case 69 /* Identifier */:
+            case 71 /* Identifier */:
                 // 'this' as a parameter
-                return node.originalKeywordKind === 97 /* ThisKeyword */ && node.parent.kind === 142 /* Parameter */;
+                return ts.identifierIsThisKeyword(node) && node.parent.kind === 146 /* Parameter */;
             default:
                 return false;
         }
@@ -61593,7 +73860,7 @@ var ts;
     // Matches the beginning of a triple slash directive
     var tripleSlashDirectivePrefixRegex = /^\/\/\/\s*</;
     function getLineStartPositionForPosition(position, sourceFile) {
-        var lineStarts = sourceFile.getLineStarts();
+        var lineStarts = ts.getLineStarts(sourceFile);
         var line = sourceFile.getLineAndCharacterOfPosition(position).line;
         return lineStarts[line];
     }
@@ -61629,42 +73896,42 @@ var ts;
             return false;
         }
         switch (n.kind) {
-            case 221 /* ClassDeclaration */:
-            case 222 /* InterfaceDeclaration */:
-            case 224 /* EnumDeclaration */:
-            case 171 /* ObjectLiteralExpression */:
-            case 167 /* ObjectBindingPattern */:
-            case 159 /* TypeLiteral */:
-            case 199 /* Block */:
-            case 226 /* ModuleBlock */:
-            case 227 /* CaseBlock */:
-            case 233 /* NamedImports */:
-            case 237 /* NamedExports */:
-                return nodeEndsWith(n, 16 /* CloseBraceToken */, sourceFile);
-            case 252 /* CatchClause */:
+            case 229 /* ClassDeclaration */:
+            case 230 /* InterfaceDeclaration */:
+            case 232 /* EnumDeclaration */:
+            case 178 /* ObjectLiteralExpression */:
+            case 174 /* ObjectBindingPattern */:
+            case 163 /* TypeLiteral */:
+            case 207 /* Block */:
+            case 234 /* ModuleBlock */:
+            case 235 /* CaseBlock */:
+            case 241 /* NamedImports */:
+            case 245 /* NamedExports */:
+                return nodeEndsWith(n, 18 /* CloseBraceToken */, sourceFile);
+            case 260 /* CatchClause */:
                 return isCompletedNode(n.block, sourceFile);
-            case 175 /* NewExpression */:
+            case 182 /* NewExpression */:
                 if (!n.arguments) {
                     return true;
                 }
-            // fall through
-            case 174 /* CallExpression */:
-            case 178 /* ParenthesizedExpression */:
-            case 164 /* ParenthesizedType */:
-                return nodeEndsWith(n, 18 /* CloseParenToken */, sourceFile);
-            case 156 /* FunctionType */:
-            case 157 /* ConstructorType */:
+            // falls through
+            case 181 /* CallExpression */:
+            case 185 /* ParenthesizedExpression */:
+            case 168 /* ParenthesizedType */:
+                return nodeEndsWith(n, 20 /* CloseParenToken */, sourceFile);
+            case 160 /* FunctionType */:
+            case 161 /* ConstructorType */:
                 return isCompletedNode(n.type, sourceFile);
-            case 148 /* Constructor */:
-            case 149 /* GetAccessor */:
-            case 150 /* SetAccessor */:
-            case 220 /* FunctionDeclaration */:
-            case 179 /* FunctionExpression */:
-            case 147 /* MethodDeclaration */:
-            case 146 /* MethodSignature */:
-            case 152 /* ConstructSignature */:
-            case 151 /* CallSignature */:
-            case 180 /* ArrowFunction */:
+            case 152 /* Constructor */:
+            case 153 /* GetAccessor */:
+            case 154 /* SetAccessor */:
+            case 228 /* FunctionDeclaration */:
+            case 186 /* FunctionExpression */:
+            case 151 /* MethodDeclaration */:
+            case 150 /* MethodSignature */:
+            case 156 /* ConstructSignature */:
+            case 155 /* CallSignature */:
+            case 187 /* ArrowFunction */:
                 if (n.body) {
                     return isCompletedNode(n.body, sourceFile);
                 }
@@ -61673,68 +73940,68 @@ var ts;
                 }
                 // Even though type parameters can be unclosed, we can get away with
                 // having at least a closing paren.
-                return hasChildOfKind(n, 18 /* CloseParenToken */, sourceFile);
-            case 225 /* ModuleDeclaration */:
+                return hasChildOfKind(n, 20 /* CloseParenToken */, sourceFile);
+            case 233 /* ModuleDeclaration */:
                 return n.body && isCompletedNode(n.body, sourceFile);
-            case 203 /* IfStatement */:
+            case 211 /* IfStatement */:
                 if (n.elseStatement) {
                     return isCompletedNode(n.elseStatement, sourceFile);
                 }
                 return isCompletedNode(n.thenStatement, sourceFile);
-            case 202 /* ExpressionStatement */:
+            case 210 /* ExpressionStatement */:
                 return isCompletedNode(n.expression, sourceFile) ||
-                    hasChildOfKind(n, 23 /* SemicolonToken */);
-            case 170 /* ArrayLiteralExpression */:
-            case 168 /* ArrayBindingPattern */:
-            case 173 /* ElementAccessExpression */:
-            case 140 /* ComputedPropertyName */:
-            case 161 /* TupleType */:
-                return nodeEndsWith(n, 20 /* CloseBracketToken */, sourceFile);
-            case 153 /* IndexSignature */:
+                    hasChildOfKind(n, 25 /* SemicolonToken */);
+            case 177 /* ArrayLiteralExpression */:
+            case 175 /* ArrayBindingPattern */:
+            case 180 /* ElementAccessExpression */:
+            case 144 /* ComputedPropertyName */:
+            case 165 /* TupleType */:
+                return nodeEndsWith(n, 22 /* CloseBracketToken */, sourceFile);
+            case 157 /* IndexSignature */:
                 if (n.type) {
                     return isCompletedNode(n.type, sourceFile);
                 }
-                return hasChildOfKind(n, 20 /* CloseBracketToken */, sourceFile);
-            case 249 /* CaseClause */:
-            case 250 /* DefaultClause */:
+                return hasChildOfKind(n, 22 /* CloseBracketToken */, sourceFile);
+            case 257 /* CaseClause */:
+            case 258 /* DefaultClause */:
                 // there is no such thing as terminator token for CaseClause/DefaultClause so for simplicity always consider them non-completed
                 return false;
-            case 206 /* ForStatement */:
-            case 207 /* ForInStatement */:
-            case 208 /* ForOfStatement */:
-            case 205 /* WhileStatement */:
+            case 214 /* ForStatement */:
+            case 215 /* ForInStatement */:
+            case 216 /* ForOfStatement */:
+            case 213 /* WhileStatement */:
                 return isCompletedNode(n.statement, sourceFile);
-            case 204 /* DoStatement */:
+            case 212 /* DoStatement */:
                 // rough approximation: if DoStatement has While keyword - then if node is completed is checking the presence of ')';
-                var hasWhileKeyword = findChildOfKind(n, 104 /* WhileKeyword */, sourceFile);
+                var hasWhileKeyword = findChildOfKind(n, 106 /* WhileKeyword */, sourceFile);
                 if (hasWhileKeyword) {
-                    return nodeEndsWith(n, 18 /* CloseParenToken */, sourceFile);
+                    return nodeEndsWith(n, 20 /* CloseParenToken */, sourceFile);
                 }
                 return isCompletedNode(n.statement, sourceFile);
-            case 158 /* TypeQuery */:
+            case 162 /* TypeQuery */:
                 return isCompletedNode(n.exprName, sourceFile);
-            case 182 /* TypeOfExpression */:
-            case 181 /* DeleteExpression */:
-            case 183 /* VoidExpression */:
-            case 190 /* YieldExpression */:
-            case 191 /* SpreadElementExpression */:
+            case 189 /* TypeOfExpression */:
+            case 188 /* DeleteExpression */:
+            case 190 /* VoidExpression */:
+            case 197 /* YieldExpression */:
+            case 198 /* SpreadElement */:
                 var unaryWordExpression = n;
                 return isCompletedNode(unaryWordExpression.expression, sourceFile);
-            case 176 /* TaggedTemplateExpression */:
+            case 183 /* TaggedTemplateExpression */:
                 return isCompletedNode(n.template, sourceFile);
-            case 189 /* TemplateExpression */:
+            case 196 /* TemplateExpression */:
                 var lastSpan = ts.lastOrUndefined(n.templateSpans);
                 return isCompletedNode(lastSpan, sourceFile);
-            case 197 /* TemplateSpan */:
+            case 205 /* TemplateSpan */:
                 return ts.nodeIsPresent(n.literal);
-            case 236 /* ExportDeclaration */:
-            case 230 /* ImportDeclaration */:
+            case 244 /* ExportDeclaration */:
+            case 238 /* ImportDeclaration */:
                 return ts.nodeIsPresent(n.moduleSpecifier);
-            case 185 /* PrefixUnaryExpression */:
+            case 192 /* PrefixUnaryExpression */:
                 return isCompletedNode(n.operand, sourceFile);
-            case 187 /* BinaryExpression */:
+            case 194 /* BinaryExpression */:
                 return isCompletedNode(n.right, sourceFile);
-            case 188 /* ConditionalExpression */:
+            case 195 /* ConditionalExpression */:
                 return isCompletedNode(n.whenFalse, sourceFile);
             default:
                 return true;
@@ -61752,7 +74019,7 @@ var ts;
             if (last.kind === expectedLastToken) {
                 return true;
             }
-            else if (last.kind === 23 /* SemicolonToken */ && children.length !== 1) {
+            else if (last.kind === 25 /* SemicolonToken */ && children.length !== 1) {
                 return children[children.length - 2].kind === expectedLastToken;
             }
         }
@@ -61790,7 +74057,7 @@ var ts;
         // for the position of the relevant node (or comma).
         var syntaxList = ts.forEach(node.parent.getChildren(), function (c) {
             // find syntax list that covers the span of the node
-            if (c.kind === 286 /* SyntaxList */ && c.pos <= node.pos && c.end >= node.end) {
+            if (c.kind === 295 /* SyntaxList */ && c.pos <= node.pos && c.end >= node.end) {
                 return c;
             }
         });
@@ -61803,78 +74070,56 @@ var ts;
      * position >= start and (position < end or (position === end && token is keyword or identifier))
      */
     function getTouchingWord(sourceFile, position, includeJsDocComment) {
-        if (includeJsDocComment === void 0) { includeJsDocComment = false; }
-        return getTouchingToken(sourceFile, position, function (n) { return isWord(n.kind); }, includeJsDocComment);
+        return getTouchingToken(sourceFile, position, includeJsDocComment, function (n) { return isWord(n.kind); });
     }
     ts.getTouchingWord = getTouchingWord;
     /* Gets the token whose text has range [start, end) and position >= start
      * and (position < end or (position === end && token is keyword or identifier or numeric/string literal))
      */
     function getTouchingPropertyName(sourceFile, position, includeJsDocComment) {
-        if (includeJsDocComment === void 0) { includeJsDocComment = false; }
-        return getTouchingToken(sourceFile, position, function (n) { return isPropertyName(n.kind); }, includeJsDocComment);
+        return getTouchingToken(sourceFile, position, includeJsDocComment, function (n) { return isPropertyName(n.kind); });
     }
     ts.getTouchingPropertyName = getTouchingPropertyName;
-    /** Returns the token if position is in [start, end) or if position === end and includeItemAtEndPosition(token) === true */
-    function getTouchingToken(sourceFile, position, includeItemAtEndPosition, includeJsDocComment) {
-        if (includeJsDocComment === void 0) { includeJsDocComment = false; }
-        return getTokenAtPositionWorker(sourceFile, position, /*allowPositionInLeadingTrivia*/ false, includeItemAtEndPosition, includeJsDocComment);
+    /**
+     * Returns the token if position is in [start, end).
+     * If position === end, returns the preceding token if includeItemAtEndPosition(previousToken) === true
+     */
+    function getTouchingToken(sourceFile, position, includeJsDocComment, includePrecedingTokenAtEndPosition) {
+        return getTokenAtPositionWorker(sourceFile, position, /*allowPositionInLeadingTrivia*/ false, includePrecedingTokenAtEndPosition, /*includeEndPosition*/ false, includeJsDocComment);
     }
     ts.getTouchingToken = getTouchingToken;
     /** Returns a token if position is in [start-of-leading-trivia, end) */
-    function getTokenAtPosition(sourceFile, position, includeJsDocComment) {
-        if (includeJsDocComment === void 0) { includeJsDocComment = false; }
-        return getTokenAtPositionWorker(sourceFile, position, /*allowPositionInLeadingTrivia*/ true, /*includeItemAtEndPosition*/ undefined, includeJsDocComment);
+    function getTokenAtPosition(sourceFile, position, includeJsDocComment, includeEndPosition) {
+        return getTokenAtPositionWorker(sourceFile, position, /*allowPositionInLeadingTrivia*/ true, /*includePrecedingTokenAtEndPosition*/ undefined, includeEndPosition, includeJsDocComment);
     }
     ts.getTokenAtPosition = getTokenAtPosition;
     /** Get the token whose text contains the position */
-    function getTokenAtPositionWorker(sourceFile, position, allowPositionInLeadingTrivia, includeItemAtEndPosition, includeJsDocComment) {
-        if (includeJsDocComment === void 0) { includeJsDocComment = false; }
+    function getTokenAtPositionWorker(sourceFile, position, allowPositionInLeadingTrivia, includePrecedingTokenAtEndPosition, includeEndPosition, includeJsDocComment) {
         var current = sourceFile;
         outer: while (true) {
-            if (isToken(current)) {
+            if (ts.isToken(current)) {
                 // exit early
                 return current;
             }
-            if (includeJsDocComment) {
-                var jsDocChildren = ts.filter(current.getChildren(), ts.isJSDocNode);
-                for (var _i = 0, jsDocChildren_1 = jsDocChildren; _i < jsDocChildren_1.length; _i++) {
-                    var jsDocChild = jsDocChildren_1[_i];
-                    var start = allowPositionInLeadingTrivia ? jsDocChild.getFullStart() : jsDocChild.getStart(sourceFile, includeJsDocComment);
-                    if (start <= position) {
-                        var end = jsDocChild.getEnd();
-                        if (position < end || (position === end && jsDocChild.kind === 1 /* EndOfFileToken */)) {
-                            current = jsDocChild;
-                            continue outer;
-                        }
-                        else if (includeItemAtEndPosition && end === position) {
-                            var previousToken = findPrecedingToken(position, sourceFile, jsDocChild);
-                            if (previousToken && includeItemAtEndPosition(previousToken)) {
-                                return previousToken;
-                            }
-                        }
-                    }
-                }
-            }
             // find the child that contains 'position'
-            for (var i = 0, n = current.getChildCount(sourceFile); i < n; i++) {
-                var child = current.getChildAt(i);
-                // all jsDocComment nodes were already visited
-                if (ts.isJSDocNode(child)) {
+            for (var _i = 0, _a = current.getChildren(); _i < _a.length; _i++) {
+                var child = _a[_i];
+                if (!includeJsDocComment && ts.isJSDocNode(child)) {
                     continue;
                 }
                 var start = allowPositionInLeadingTrivia ? child.getFullStart() : child.getStart(sourceFile, includeJsDocComment);
-                if (start <= position) {
-                    var end = child.getEnd();
-                    if (position < end || (position === end && child.kind === 1 /* EndOfFileToken */)) {
-                        current = child;
-                        continue outer;
-                    }
-                    else if (includeItemAtEndPosition && end === position) {
-                        var previousToken = findPrecedingToken(position, sourceFile, child);
-                        if (previousToken && includeItemAtEndPosition(previousToken)) {
-                            return previousToken;
-                        }
+                if (start > position) {
+                    continue;
+                }
+                var end = child.getEnd();
+                if (position < end || (position === end && (child.kind === 1 /* EndOfFileToken */ || includeEndPosition))) {
+                    current = child;
+                    continue outer;
+                }
+                else if (includePrecedingTokenAtEndPosition && end === position) {
+                    var previousToken = findPrecedingToken(position, sourceFile, child);
+                    if (previousToken && includePrecedingTokenAtEndPosition(previousToken)) {
+                        return previousToken;
                     }
                 }
             }
@@ -61882,18 +74127,18 @@ var ts;
         }
     }
     /**
-      * The token on the left of the position is the token that strictly includes the position
-      * or sits to the left of the cursor if it is on a boundary. For example
-      *
-      *   fo|o               -> will return foo
-      *   foo <comment> |bar -> will return foo
-      *
-      */
+     * The token on the left of the position is the token that strictly includes the position
+     * or sits to the left of the cursor if it is on a boundary. For example
+     *
+     *   fo|o               -> will return foo
+     *   foo <comment> |bar -> will return foo
+     *
+     */
     function findTokenOnLeftOfPosition(file, position) {
         // Ideally, getTokenAtPosition should return a token. However, it is currently
         // broken, so we do a check to make sure the result was indeed a token.
-        var tokenAtPosition = getTokenAtPosition(file, position);
-        if (isToken(tokenAtPosition) && position > tokenAtPosition.getStart(file) && position < tokenAtPosition.getEnd()) {
+        var tokenAtPosition = getTokenAtPosition(file, position, /*includeJsDocComment*/ false);
+        if (ts.isToken(tokenAtPosition) && position > tokenAtPosition.getStart(file) && position < tokenAtPosition.getEnd()) {
             return tokenAtPosition;
         }
         return findPrecedingToken(position, file);
@@ -61902,7 +74147,7 @@ var ts;
     function findNextToken(previousToken, parent) {
         return find(parent);
         function find(n) {
-            if (isToken(n) && n.pos === previousToken.end) {
+            if (ts.isToken(n) && n.pos === previousToken.end) {
                 // this is token that starts at the end of previous token - return it
                 return n;
             }
@@ -61922,10 +74167,10 @@ var ts;
         }
     }
     ts.findNextToken = findNextToken;
-    function findPrecedingToken(position, sourceFile, startNode) {
+    function findPrecedingToken(position, sourceFile, startNode, includeJsDoc) {
         return find(startNode || sourceFile);
         function findRightmostToken(n) {
-            if (isToken(n) || n.kind === 244 /* JsxText */) {
+            if (ts.isToken(n)) {
                 return n;
             }
             var children = n.getChildren();
@@ -61933,11 +74178,11 @@ var ts;
             return candidate && findRightmostToken(candidate);
         }
         function find(n) {
-            if (isToken(n) || n.kind === 244 /* JsxText */) {
+            if (ts.isToken(n)) {
                 return n;
             }
             var children = n.getChildren();
-            for (var i = 0, len = children.length; i < len; i++) {
+            for (var i = 0; i < children.length; i++) {
                 var child = children[i];
                 // condition 'position < child.end' checks if child node end after the position
                 // in the example below this condition will be false for 'aaaa' and 'bbbb' and true for 'ccc'
@@ -61947,10 +74192,10 @@ var ts;
                 // if no - position is in the node itself so we should recurse in it.
                 // NOTE: JsxText is a weird kind of node that can contain only whitespaces (since they are not counted as trivia).
                 // if this is the case - then we should assume that token in question is located in previous child.
-                if (position < child.end && (nodeHasTokens(child) || child.kind === 244 /* JsxText */)) {
-                    var start = child.getStart(sourceFile);
+                if (position < child.end && (nodeHasTokens(child) || child.kind === 10 /* JsxText */)) {
+                    var start = child.getStart(sourceFile, includeJsDoc);
                     var lookInPreviousChild = (start >= position) ||
-                        (child.kind === 244 /* JsxText */ && start === child.end); // whitespace only JsxText
+                        (child.kind === 10 /* JsxText */ && start === child.end); // whitespace only JsxText
                     if (lookInPreviousChild) {
                         // actual start of the node is past the position - previous token should be at the end of previous child
                         var candidate = findRightmostChildNodeWithTokens(children, /*exclusiveStartPosition*/ i);
@@ -61962,7 +74207,7 @@ var ts;
                     }
                 }
             }
-            ts.Debug.assert(startNode !== undefined || n.kind === 256 /* SourceFile */);
+            ts.Debug.assert(startNode !== undefined || n.kind === 265 /* SourceFile */ || ts.isJSDocCommentContainingNode(n));
             // Here we know that none of child token nodes embrace the position,
             // the only known case is when position is at the end of the file.
             // Try to find the rightmost token in the file without filtering.
@@ -62001,55 +74246,65 @@ var ts;
         return false;
     }
     ts.isInString = isInString;
-    function isInComment(sourceFile, position) {
-        return isInCommentHelper(sourceFile, position, /*predicate*/ undefined);
-    }
-    ts.isInComment = isInComment;
     /**
      * returns true if the position is in between the open and close elements of an JSX expression.
      */
     function isInsideJsxElementOrAttribute(sourceFile, position) {
-        var token = getTokenAtPosition(sourceFile, position);
+        var token = getTokenAtPosition(sourceFile, position, /*includeJsDocComment*/ false);
         if (!token) {
             return false;
         }
-        if (token.kind === 244 /* JsxText */) {
+        if (token.kind === 10 /* JsxText */) {
             return true;
         }
         // <div>Hello |</div>
-        if (token.kind === 25 /* LessThanToken */ && token.parent.kind === 244 /* JsxText */) {
+        if (token.kind === 27 /* LessThanToken */ && token.parent.kind === 10 /* JsxText */) {
             return true;
         }
         // <div> { | </div> or <div a={| </div>
-        if (token.kind === 25 /* LessThanToken */ && token.parent.kind === 248 /* JsxExpression */) {
+        if (token.kind === 27 /* LessThanToken */ && token.parent.kind === 256 /* JsxExpression */) {
             return true;
         }
         // <div> {
         // |
         // } < /div>
-        if (token && token.kind === 16 /* CloseBraceToken */ && token.parent.kind === 248 /* JsxExpression */) {
+        if (token && token.kind === 18 /* CloseBraceToken */ && token.parent.kind === 256 /* JsxExpression */) {
             return true;
         }
         // <div>|</div>
-        if (token.kind === 25 /* LessThanToken */ && token.parent.kind === 245 /* JsxClosingElement */) {
+        if (token.kind === 27 /* LessThanToken */ && token.parent.kind === 252 /* JsxClosingElement */) {
             return true;
         }
         return false;
     }
     ts.isInsideJsxElementOrAttribute = isInsideJsxElementOrAttribute;
     function isInTemplateString(sourceFile, position) {
-        var token = getTokenAtPosition(sourceFile, position);
+        var token = getTokenAtPosition(sourceFile, position, /*includeJsDocComment*/ false);
         return ts.isTemplateLiteralKind(token.kind) && position > token.getStart(sourceFile);
     }
     ts.isInTemplateString = isInTemplateString;
     /**
-     * Returns true if the cursor at position in sourceFile is within a comment that additionally
-     * satisfies predicate, and false otherwise.
+     * Returns true if the cursor at position in sourceFile is within a comment.
+     *
+     * @param tokenAtPosition Must equal `getTokenAtPosition(sourceFile, position)
+     * @param predicate Additional predicate to test on the comment range.
      */
-    function isInCommentHelper(sourceFile, position, predicate) {
-        var token = getTokenAtPosition(sourceFile, position);
-        if (token && position <= token.getStart(sourceFile)) {
-            var commentRanges = ts.getLeadingCommentRanges(sourceFile.text, token.pos);
+    function isInComment(sourceFile, position, tokenAtPosition, predicate) {
+        if (tokenAtPosition === void 0) { tokenAtPosition = getTokenAtPosition(sourceFile, position, /*includeJsDocComment*/ false); }
+        return position <= tokenAtPosition.getStart(sourceFile) &&
+            (isInCommentRange(ts.getLeadingCommentRanges(sourceFile.text, tokenAtPosition.pos)) ||
+                isInCommentRange(ts.getTrailingCommentRanges(sourceFile.text, tokenAtPosition.pos)));
+        function isInCommentRange(commentRanges) {
+            return ts.forEach(commentRanges, function (c) { return isPositionInCommentRange(c, position, sourceFile.text) && (!predicate || predicate(c)); });
+        }
+    }
+    ts.isInComment = isInComment;
+    function isPositionInCommentRange(_a, position, text) {
+        var pos = _a.pos, end = _a.end, kind = _a.kind;
+        if (pos < position && position < end) {
+            return true;
+        }
+        else if (position === end) {
             // The end marker of a single-line comment does not include the newline character.
             // In the following case, we are inside a comment (^ denotes the cursor position):
             //
@@ -62060,18 +74315,16 @@ var ts;
             //    /* asdf */^
             //
             // Internally, we represent the end of the comment at the newline and closing '/', respectively.
-            return predicate ?
-                ts.forEach(commentRanges, function (c) { return c.pos < position &&
-                    (c.kind == 2 /* SingleLineCommentTrivia */ ? position <= c.end : position < c.end) &&
-                    predicate(c); }) :
-                ts.forEach(commentRanges, function (c) { return c.pos < position &&
-                    (c.kind == 2 /* SingleLineCommentTrivia */ ? position <= c.end : position < c.end); });
+            return kind === 2 /* SingleLineCommentTrivia */ ||
+                // true for unterminated multi-line comment
+                !(text.charCodeAt(end - 1) === 47 /* slash */ && text.charCodeAt(end - 2) === 42 /* asterisk */);
+        }
+        else {
+            return false;
         }
-        return false;
     }
-    ts.isInCommentHelper = isInCommentHelper;
     function hasDocComment(sourceFile, position) {
-        var token = getTokenAtPosition(sourceFile, position);
+        var token = getTokenAtPosition(sourceFile, position, /*includeJsDocComment*/ false);
         // First, we have to see if this position actually landed in a comment.
         var commentRanges = ts.getLeadingCommentRanges(sourceFile.text, token.pos);
         return ts.forEach(commentRanges, jsDocPrefix);
@@ -62081,42 +74334,6 @@ var ts;
         }
     }
     ts.hasDocComment = hasDocComment;
-    /**
-     * Get the corresponding JSDocTag node if the position is in a jsDoc comment
-     */
-    function getJsDocTagAtPosition(sourceFile, position) {
-        var node = ts.getTokenAtPosition(sourceFile, position);
-        if (isToken(node)) {
-            switch (node.kind) {
-                case 102 /* VarKeyword */:
-                case 108 /* LetKeyword */:
-                case 74 /* ConstKeyword */:
-                    // if the current token is var, let or const, skip the VariableDeclarationList
-                    node = node.parent === undefined ? undefined : node.parent.parent;
-                    break;
-                default:
-                    node = node.parent;
-                    break;
-            }
-        }
-        if (node) {
-            if (node.jsDocComments) {
-                for (var _i = 0, _a = node.jsDocComments; _i < _a.length; _i++) {
-                    var jsDocComment = _a[_i];
-                    if (jsDocComment.tags) {
-                        for (var _b = 0, _c = jsDocComment.tags; _b < _c.length; _b++) {
-                            var tag = _c[_b];
-                            if (tag.pos <= position && position <= tag.end) {
-                                return tag;
-                            }
-                        }
-                    }
-                }
-            }
-        }
-        return undefined;
-    }
-    ts.getJsDocTagAtPosition = getJsDocTagAtPosition;
     function nodeHasTokens(n) {
         // If we have a token or node that has a non-zero width, it must have tokens.
         // Note, that getWidth() does not take trivia into account.
@@ -62126,38 +74343,34 @@ var ts;
         var flags = ts.getCombinedModifierFlags(node);
         var result = [];
         if (flags & 8 /* Private */)
-            result.push(ts.ScriptElementKindModifier.privateMemberModifier);
+            result.push("private" /* privateMemberModifier */);
         if (flags & 16 /* Protected */)
-            result.push(ts.ScriptElementKindModifier.protectedMemberModifier);
+            result.push("protected" /* protectedMemberModifier */);
         if (flags & 4 /* Public */)
-            result.push(ts.ScriptElementKindModifier.publicMemberModifier);
+            result.push("public" /* publicMemberModifier */);
         if (flags & 32 /* Static */)
-            result.push(ts.ScriptElementKindModifier.staticModifier);
+            result.push("static" /* staticModifier */);
         if (flags & 128 /* Abstract */)
-            result.push(ts.ScriptElementKindModifier.abstractModifier);
+            result.push("abstract" /* abstractModifier */);
         if (flags & 1 /* Export */)
-            result.push(ts.ScriptElementKindModifier.exportedModifier);
+            result.push("export" /* exportedModifier */);
         if (ts.isInAmbientContext(node))
-            result.push(ts.ScriptElementKindModifier.ambientModifier);
-        return result.length > 0 ? result.join(",") : ts.ScriptElementKindModifier.none;
+            result.push("declare" /* ambientModifier */);
+        return result.length > 0 ? result.join(",") : "" /* none */;
     }
     ts.getNodeModifiers = getNodeModifiers;
     function getTypeArgumentOrTypeParameterList(node) {
-        if (node.kind === 155 /* TypeReference */ || node.kind === 174 /* CallExpression */) {
+        if (node.kind === 159 /* TypeReference */ || node.kind === 181 /* CallExpression */) {
             return node.typeArguments;
         }
-        if (ts.isFunctionLike(node) || node.kind === 221 /* ClassDeclaration */ || node.kind === 222 /* InterfaceDeclaration */) {
+        if (ts.isFunctionLike(node) || node.kind === 229 /* ClassDeclaration */ || node.kind === 230 /* InterfaceDeclaration */) {
             return node.typeParameters;
         }
         return undefined;
     }
     ts.getTypeArgumentOrTypeParameterList = getTypeArgumentOrTypeParameterList;
-    function isToken(n) {
-        return n.kind >= 0 /* FirstToken */ && n.kind <= 138 /* LastToken */;
-    }
-    ts.isToken = isToken;
     function isWord(kind) {
-        return kind === 69 /* Identifier */ || ts.isKeyword(kind);
+        return kind === 71 /* Identifier */ || ts.isKeyword(kind);
     }
     ts.isWord = isWord;
     function isPropertyName(kind) {
@@ -62169,7 +74382,7 @@ var ts;
     ts.isComment = isComment;
     function isStringOrRegularExpressionOrTemplateLiteral(kind) {
         if (kind === 9 /* StringLiteral */
-            || kind === 10 /* RegularExpressionLiteral */
+            || kind === 12 /* RegularExpressionLiteral */
             || ts.isTemplateLiteralKind(kind)) {
             return true;
         }
@@ -62177,7 +74390,7 @@ var ts;
     }
     ts.isStringOrRegularExpressionOrTemplateLiteral = isStringOrRegularExpressionOrTemplateLiteral;
     function isPunctuation(kind) {
-        return 15 /* FirstPunctuation */ <= kind && kind <= 68 /* LastPunctuation */;
+        return 17 /* FirstPunctuation */ <= kind && kind <= 70 /* LastPunctuation */;
     }
     ts.isPunctuation = isPunctuation;
     function isInsideTemplateLiteral(node, position) {
@@ -62187,15 +74400,24 @@ var ts;
     ts.isInsideTemplateLiteral = isInsideTemplateLiteral;
     function isAccessibilityModifier(kind) {
         switch (kind) {
-            case 112 /* PublicKeyword */:
-            case 110 /* PrivateKeyword */:
-            case 111 /* ProtectedKeyword */:
+            case 114 /* PublicKeyword */:
+            case 112 /* PrivateKeyword */:
+            case 113 /* ProtectedKeyword */:
                 return true;
         }
         return false;
     }
     ts.isAccessibilityModifier = isAccessibilityModifier;
+    function cloneCompilerOptions(options) {
+        var result = ts.clone(options);
+        ts.setConfigFileInOptions(result, options && options.configFile);
+        return result;
+    }
+    ts.cloneCompilerOptions = cloneCompilerOptions;
     function compareDataObjects(dst, src) {
+        if (!dst || !src || Object.keys(dst).length !== Object.keys(src).length) {
+            return false;
+        }
         for (var e in dst) {
             if (typeof dst[e] === "object") {
                 if (!compareDataObjects(dst[e], src[e])) {
@@ -62212,18 +74434,18 @@ var ts;
     }
     ts.compareDataObjects = compareDataObjects;
     function isArrayLiteralOrObjectLiteralDestructuringPattern(node) {
-        if (node.kind === 170 /* ArrayLiteralExpression */ ||
-            node.kind === 171 /* ObjectLiteralExpression */) {
+        if (node.kind === 177 /* ArrayLiteralExpression */ ||
+            node.kind === 178 /* ObjectLiteralExpression */) {
             // [a,b,c] from:
             // [a, b, c] = someExpression;
-            if (node.parent.kind === 187 /* BinaryExpression */ &&
+            if (node.parent.kind === 194 /* BinaryExpression */ &&
                 node.parent.left === node &&
-                node.parent.operatorToken.kind === 56 /* EqualsToken */) {
+                node.parent.operatorToken.kind === 58 /* EqualsToken */) {
                 return true;
             }
             // [a, b, c] from:
             // for([a, b, c] of expression)
-            if (node.parent.kind === 208 /* ForOfStatement */ &&
+            if (node.parent.kind === 216 /* ForOfStatement */ &&
                 node.parent.initializer === node) {
                 return true;
             }
@@ -62231,7 +74453,7 @@ var ts;
             // [x, [a, b, c] ] = someExpression
             // or
             // {x, a: {a, b, c} } = someExpression
-            if (isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent.kind === 253 /* PropertyAssignment */ ? node.parent.parent : node.parent)) {
+            if (isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent.kind === 261 /* PropertyAssignment */ ? node.parent.parent : node.parent)) {
                 return true;
             }
         }
@@ -62244,28 +74466,64 @@ var ts;
     }
     ts.hasTrailingDirectorySeparator = hasTrailingDirectorySeparator;
     function isInReferenceComment(sourceFile, position) {
-        return isInCommentHelper(sourceFile, position, isReferenceComment);
-        function isReferenceComment(c) {
+        return isInComment(sourceFile, position, /*tokenAtPosition*/ undefined, function (c) {
             var commentText = sourceFile.text.substring(c.pos, c.end);
             return tripleSlashDirectivePrefixRegex.test(commentText);
-        }
+        });
     }
     ts.isInReferenceComment = isInReferenceComment;
     function isInNonReferenceComment(sourceFile, position) {
-        return isInCommentHelper(sourceFile, position, isNonReferenceComment);
-        function isNonReferenceComment(c) {
+        return isInComment(sourceFile, position, /*tokenAtPosition*/ undefined, function (c) {
             var commentText = sourceFile.text.substring(c.pos, c.end);
             return !tripleSlashDirectivePrefixRegex.test(commentText);
-        }
+        });
     }
     ts.isInNonReferenceComment = isInNonReferenceComment;
+    function createTextSpanFromNode(node, sourceFile) {
+        return ts.createTextSpanFromBounds(node.getStart(sourceFile), node.getEnd());
+    }
+    ts.createTextSpanFromNode = createTextSpanFromNode;
+    function createTextSpanFromRange(range) {
+        return ts.createTextSpanFromBounds(range.pos, range.end);
+    }
+    ts.createTextSpanFromRange = createTextSpanFromRange;
+    function isTypeKeyword(kind) {
+        switch (kind) {
+            case 119 /* AnyKeyword */:
+            case 122 /* BooleanKeyword */:
+            case 130 /* NeverKeyword */:
+            case 133 /* NumberKeyword */:
+            case 134 /* ObjectKeyword */:
+            case 136 /* StringKeyword */:
+            case 137 /* SymbolKeyword */:
+            case 105 /* VoidKeyword */:
+                return true;
+            default:
+                return false;
+        }
+    }
+    ts.isTypeKeyword = isTypeKeyword;
+    /** True if the symbol is for an external module, as opposed to a namespace. */
+    function isExternalModuleSymbol(moduleSymbol) {
+        ts.Debug.assert(!!(moduleSymbol.flags & 1536 /* Module */));
+        return moduleSymbol.name.charCodeAt(0) === 34 /* doubleQuote */;
+    }
+    ts.isExternalModuleSymbol = isExternalModuleSymbol;
+    /** Returns `true` the first time it encounters a node and `false` afterwards. */
+    function nodeSeenTracker() {
+        var seen = [];
+        return function (node) {
+            var id = ts.getNodeId(node);
+            return !seen[id] && (seen[id] = true);
+        };
+    }
+    ts.nodeSeenTracker = nodeSeenTracker;
 })(ts || (ts = {}));
 // Display-part writer helpers
 /* @internal */
-var ts;
 (function (ts) {
     function isFirstDeclarationOfSymbolParameter(symbol) {
-        return symbol.declarations && symbol.declarations.length > 0 && symbol.declarations[0].kind === 142 /* Parameter */;
+        return symbol.declarations && symbol.declarations.length > 0 && symbol.declarations[0].kind === 146 /* Parameter */;
     }
     ts.isFirstDeclarationOfSymbolParameter = isFirstDeclarationOfSymbolParameter;
     var displayPartWriter = getDisplayPartWriter();
@@ -62282,13 +74540,15 @@ var ts;
             writeSpace: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.space); },
             writeStringLiteral: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.stringLiteral); },
             writeParameter: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.parameterName); },
+            writeProperty: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.propertyName); },
             writeSymbol: writeSymbol,
             writeLine: writeLine,
             increaseIndent: function () { indent++; },
             decreaseIndent: function () { indent--; },
             clear: resetWriter,
-            trackSymbol: function () { },
-            reportInaccessibleThisError: function () { }
+            trackSymbol: ts.noop,
+            reportInaccessibleThisError: ts.noop,
+            reportPrivateInBaseOfClassExpression: ts.noop,
         };
         function writeIndent() {
             if (lineStart) {
@@ -62318,7 +74578,7 @@ var ts;
         }
     }
     function symbolPart(text, symbol) {
-        return displayPart(text, displayPartKind(symbol), symbol);
+        return displayPart(text, displayPartKind(symbol));
         function displayPartKind(symbol) {
             var flags = symbol.flags;
             if (flags & 3 /* Variable */) {
@@ -62367,7 +74627,7 @@ var ts;
         }
     }
     ts.symbolPart = symbolPart;
-    function displayPart(text, kind, symbol) {
+    function displayPart(text, kind) {
         return {
             text: text,
             kind: ts.SymbolDisplayPartKind[kind]
@@ -62441,23 +74701,18 @@ var ts;
     function getDeclaredName(typeChecker, symbol, location) {
         // If this is an export or import specifier it could have been renamed using the 'as' syntax.
         // If so we want to search for whatever is under the cursor.
-        if (isImportOrExportSpecifierName(location)) {
-            return location.getText();
-        }
-        else if (ts.isStringOrNumericLiteral(location.kind) &&
-            location.parent.kind === 140 /* ComputedPropertyName */) {
+        if (isImportOrExportSpecifierName(location) || ts.isStringOrNumericLiteral(location) && location.parent.kind === 144 /* ComputedPropertyName */) {
             return location.text;
         }
         // Try to get the local symbol if we're dealing with an 'export default'
         // since that symbol has the "true" name.
         var localExportDefaultSymbol = ts.getLocalSymbolForExportDefault(symbol);
-        var name = typeChecker.symbolToString(localExportDefaultSymbol || symbol);
-        return name;
+        return typeChecker.symbolToString(localExportDefaultSymbol || symbol);
     }
     ts.getDeclaredName = getDeclaredName;
     function isImportOrExportSpecifierName(location) {
         return location.parent &&
-            (location.parent.kind === 234 /* ImportSpecifier */ || location.parent.kind === 238 /* ExportSpecifier */) &&
+            (location.parent.kind === 242 /* ImportSpecifier */ || location.parent.kind === 246 /* ExportSpecifier */) &&
             location.parent.propertyName === location;
     }
     ts.isImportOrExportSpecifierName = isImportOrExportSpecifierName;
@@ -62473,7 +74728,6 @@ var ts;
             (name.charCodeAt(0) === 34 /* doubleQuote */ || name.charCodeAt(0) === 39 /* singleQuote */)) {
             return name.substring(1, length - 1);
         }
-        ;
         return name;
     }
     ts.stripQuotes = stripQuotes;
@@ -62499,54 +74753,45 @@ var ts;
         return ts.ensureScriptKind(fileName, scriptKind);
     }
     ts.getScriptKind = getScriptKind;
-    function sanitizeConfigFile(configFileName, content) {
-        var options = {
-            fileName: "config.js",
-            compilerOptions: {
-                target: 2 /* ES6 */,
-                removeComments: true
-            },
-            reportDiagnostics: true
-        };
-        var _a = ts.transpileModule("(" + content + ")", options), outputText = _a.outputText, diagnostics = _a.diagnostics;
-        // Becasue the content was wrapped in "()", the start position of diagnostics needs to be subtract by 1
-        // also, the emitted result will have "(" in the beginning and ");" in the end. We need to strip these
-        // as well
-        var trimmedOutput = outputText.trim();
-        for (var _i = 0, diagnostics_3 = diagnostics; _i < diagnostics_3.length; _i++) {
-            var diagnostic = diagnostics_3[_i];
-            diagnostic.start = diagnostic.start - 1;
+    function getFirstNonSpaceCharacterPosition(text, position) {
+        while (ts.isWhiteSpaceLike(text.charCodeAt(position))) {
+            position += 1;
         }
-        var _b = ts.parseConfigFileTextToJson(configFileName, trimmedOutput.substring(1, trimmedOutput.length - 2), /*stripComments*/ false), config = _b.config, error = _b.error;
-        return {
-            configJsonObject: config || {},
-            diagnostics: error ? ts.concatenate(diagnostics, [error]) : diagnostics
-        };
+        return position;
+    }
+    ts.getFirstNonSpaceCharacterPosition = getFirstNonSpaceCharacterPosition;
+    function getOpenBrace(constructor, sourceFile) {
+        // First token is the open curly, this is where we want to put the 'super' call.
+        return constructor.body.getFirstToken(sourceFile);
     }
-    ts.sanitizeConfigFile = sanitizeConfigFile;
+    ts.getOpenBrace = getOpenBrace;
+    function getOpenBraceOfClassLike(declaration, sourceFile) {
+        return ts.getTokenAtPosition(sourceFile, declaration.members.pos - 1, /*includeJsDocComment*/ false);
+    }
+    ts.getOpenBraceOfClassLike = getOpenBraceOfClassLike;
 })(ts || (ts = {}));
 var ts;
 (function (ts) {
     /// Classifier
     function createClassifier() {
-        var scanner = ts.createScanner(2 /* Latest */, /*skipTrivia*/ false);
+        var scanner = ts.createScanner(5 /* Latest */, /*skipTrivia*/ false);
         /// We do not have a full parser support to know when we should parse a regex or not
         /// If we consider every slash token to be a regex, we could be missing cases like "1/2/3", where
         /// we have a series of divide operator. this list allows us to be more accurate by ruling out
         /// locations where a regexp cannot exist.
         var noRegexTable = [];
-        noRegexTable[69 /* Identifier */] = true;
+        noRegexTable[71 /* Identifier */] = true;
         noRegexTable[9 /* StringLiteral */] = true;
         noRegexTable[8 /* NumericLiteral */] = true;
-        noRegexTable[10 /* RegularExpressionLiteral */] = true;
-        noRegexTable[97 /* ThisKeyword */] = true;
-        noRegexTable[41 /* PlusPlusToken */] = true;
-        noRegexTable[42 /* MinusMinusToken */] = true;
-        noRegexTable[18 /* CloseParenToken */] = true;
-        noRegexTable[20 /* CloseBracketToken */] = true;
-        noRegexTable[16 /* CloseBraceToken */] = true;
-        noRegexTable[99 /* TrueKeyword */] = true;
-        noRegexTable[84 /* FalseKeyword */] = true;
+        noRegexTable[12 /* RegularExpressionLiteral */] = true;
+        noRegexTable[99 /* ThisKeyword */] = true;
+        noRegexTable[43 /* PlusPlusToken */] = true;
+        noRegexTable[44 /* MinusMinusToken */] = true;
+        noRegexTable[20 /* CloseParenToken */] = true;
+        noRegexTable[22 /* CloseBracketToken */] = true;
+        noRegexTable[18 /* CloseBraceToken */] = true;
+        noRegexTable[101 /* TrueKeyword */] = true;
+        noRegexTable[86 /* FalseKeyword */] = true;
         // Just a stack of TemplateHeads and OpenCurlyBraces, used to perform rudimentary (inexact)
         // classification on template strings. Because of the context free nature of templates,
         // the only precise way to classify a template portion would be by propagating the stack across
@@ -62571,10 +74816,10 @@ var ts;
         /** Returns true if 'keyword2' can legally follow 'keyword1' in any language construct. */
         function canFollow(keyword1, keyword2) {
             if (ts.isAccessibilityModifier(keyword1)) {
-                if (keyword2 === 123 /* GetKeyword */ ||
-                    keyword2 === 131 /* SetKeyword */ ||
-                    keyword2 === 121 /* ConstructorKeyword */ ||
-                    keyword2 === 113 /* StaticKeyword */) {
+                if (keyword2 === 125 /* GetKeyword */ ||
+                    keyword2 === 135 /* SetKeyword */ ||
+                    keyword2 === 123 /* ConstructorKeyword */ ||
+                    keyword2 === 115 /* StaticKeyword */) {
                     // Allow things like "public get", "public constructor" and "public static".
                     // These are all legal.
                     return true;
@@ -62591,9 +74836,9 @@ var ts;
             var entries = [];
             var dense = classifications.spans;
             var lastEnd = 0;
-            for (var i = 0, n = dense.length; i < n; i += 3) {
+            for (var i = 0; i < dense.length; i += 3) {
                 var start = dense[i];
-                var length_5 = dense[i + 1];
+                var length_6 = dense[i + 1];
                 var type = dense[i + 2];
                 // Make a whitespace entry between the last item and this one.
                 if (lastEnd >= 0) {
@@ -62602,8 +74847,8 @@ var ts;
                         entries.push({ length: whitespaceLength_1, classification: ts.TokenClass.Whitespace });
                     }
                 }
-                entries.push({ length: length_5, classification: convertClassification(type) });
-                lastEnd = start + length_5;
+                entries.push({ length: length_6, classification: convertClassification(type) });
+                lastEnd = start + length_6;
             }
             var whitespaceLength = text.length - lastEnd;
             if (whitespaceLength > 0) {
@@ -62671,9 +74916,9 @@ var ts;
                 case 5 /* InTemplateMiddleOrTail */:
                     text = "}\n" + text;
                     offset = 2;
-                // fallthrough
+                // falls through
                 case 6 /* InTemplateSubstitutionPosition */:
-                    templateStack.push(12 /* TemplateHead */);
+                    templateStack.push(14 /* TemplateHead */);
                     break;
             }
             scanner.setText(text);
@@ -62704,71 +74949,71 @@ var ts;
             do {
                 token = scanner.scan();
                 if (!ts.isTrivia(token)) {
-                    if ((token === 39 /* SlashToken */ || token === 61 /* SlashEqualsToken */) && !noRegexTable[lastNonTriviaToken]) {
-                        if (scanner.reScanSlashToken() === 10 /* RegularExpressionLiteral */) {
-                            token = 10 /* RegularExpressionLiteral */;
+                    if ((token === 41 /* SlashToken */ || token === 63 /* SlashEqualsToken */) && !noRegexTable[lastNonTriviaToken]) {
+                        if (scanner.reScanSlashToken() === 12 /* RegularExpressionLiteral */) {
+                            token = 12 /* RegularExpressionLiteral */;
                         }
                     }
-                    else if (lastNonTriviaToken === 21 /* DotToken */ && isKeyword(token)) {
-                        token = 69 /* Identifier */;
+                    else if (lastNonTriviaToken === 23 /* DotToken */ && isKeyword(token)) {
+                        token = 71 /* Identifier */;
                     }
                     else if (isKeyword(lastNonTriviaToken) && isKeyword(token) && !canFollow(lastNonTriviaToken, token)) {
                         // We have two keywords in a row.  Only treat the second as a keyword if
                         // it's a sequence that could legally occur in the language.  Otherwise
                         // treat it as an identifier.  This way, if someone writes "private var"
                         // we recognize that 'var' is actually an identifier here.
-                        token = 69 /* Identifier */;
+                        token = 71 /* Identifier */;
                     }
-                    else if (lastNonTriviaToken === 69 /* Identifier */ &&
-                        token === 25 /* LessThanToken */) {
+                    else if (lastNonTriviaToken === 71 /* Identifier */ &&
+                        token === 27 /* LessThanToken */) {
                         // Could be the start of something generic.  Keep track of that by bumping
                         // up the current count of generic contexts we may be in.
                         angleBracketStack++;
                     }
-                    else if (token === 27 /* GreaterThanToken */ && angleBracketStack > 0) {
+                    else if (token === 29 /* GreaterThanToken */ && angleBracketStack > 0) {
                         // If we think we're currently in something generic, then mark that that
                         // generic entity is complete.
                         angleBracketStack--;
                     }
-                    else if (token === 117 /* AnyKeyword */ ||
-                        token === 132 /* StringKeyword */ ||
-                        token === 130 /* NumberKeyword */ ||
-                        token === 120 /* BooleanKeyword */ ||
-                        token === 133 /* SymbolKeyword */) {
+                    else if (token === 119 /* AnyKeyword */ ||
+                        token === 136 /* StringKeyword */ ||
+                        token === 133 /* NumberKeyword */ ||
+                        token === 122 /* BooleanKeyword */ ||
+                        token === 137 /* SymbolKeyword */) {
                         if (angleBracketStack > 0 && !syntacticClassifierAbsent) {
                             // If it looks like we're could be in something generic, don't classify this
                             // as a keyword.  We may just get overwritten by the syntactic classifier,
                             // causing a noisy experience for the user.
-                            token = 69 /* Identifier */;
+                            token = 71 /* Identifier */;
                         }
                     }
-                    else if (token === 12 /* TemplateHead */) {
+                    else if (token === 14 /* TemplateHead */) {
                         templateStack.push(token);
                     }
-                    else if (token === 15 /* OpenBraceToken */) {
+                    else if (token === 17 /* OpenBraceToken */) {
                         // If we don't have anything on the template stack,
                         // then we aren't trying to keep track of a previously scanned template head.
                         if (templateStack.length > 0) {
                             templateStack.push(token);
                         }
                     }
-                    else if (token === 16 /* CloseBraceToken */) {
+                    else if (token === 18 /* CloseBraceToken */) {
                         // If we don't have anything on the template stack,
                         // then we aren't trying to keep track of a previously scanned template head.
                         if (templateStack.length > 0) {
                             var lastTemplateStackToken = ts.lastOrUndefined(templateStack);
-                            if (lastTemplateStackToken === 12 /* TemplateHead */) {
+                            if (lastTemplateStackToken === 14 /* TemplateHead */) {
                                 token = scanner.reScanTemplateToken();
                                 // Only pop on a TemplateTail; a TemplateMiddle indicates there is more for us.
-                                if (token === 14 /* TemplateTail */) {
+                                if (token === 16 /* TemplateTail */) {
                                     templateStack.pop();
                                 }
                                 else {
-                                    ts.Debug.assert(token === 13 /* TemplateMiddle */, "Should have been a template middle. Was " + token);
+                                    ts.Debug.assert(token === 15 /* TemplateMiddle */, "Should have been a template middle. Was " + token);
                                 }
                             }
                             else {
-                                ts.Debug.assert(lastTemplateStackToken === 15 /* OpenBraceToken */, "Should have been an open brace. Was: " + token);
+                                ts.Debug.assert(lastTemplateStackToken === 17 /* OpenBraceToken */, "Should have been an open brace. Was: " + token);
                                 templateStack.pop();
                             }
                         }
@@ -62809,10 +75054,10 @@ var ts;
                     }
                     else if (ts.isTemplateLiteralKind(token)) {
                         if (scanner.isUnterminated()) {
-                            if (token === 14 /* TemplateTail */) {
+                            if (token === 16 /* TemplateTail */) {
                                 result.endOfLineState = 5 /* InTemplateMiddleOrTail */;
                             }
-                            else if (token === 11 /* NoSubstitutionTemplateLiteral */) {
+                            else if (token === 13 /* NoSubstitutionTemplateLiteral */) {
                                 result.endOfLineState = 4 /* InTemplateHeadOrNoSubstitutionTemplate */;
                             }
                             else {
@@ -62820,7 +75065,7 @@ var ts;
                             }
                         }
                     }
-                    else if (templateStack.length > 0 && ts.lastOrUndefined(templateStack) === 12 /* TemplateHead */) {
+                    else if (templateStack.length > 0 && ts.lastOrUndefined(templateStack) === 14 /* TemplateHead */) {
                         result.endOfLineState = 6 /* InTemplateSubstitutionPosition */;
                     }
                 }
@@ -62850,43 +75095,43 @@ var ts;
         }
         function isBinaryExpressionOperatorToken(token) {
             switch (token) {
-                case 37 /* AsteriskToken */:
-                case 39 /* SlashToken */:
-                case 40 /* PercentToken */:
-                case 35 /* PlusToken */:
-                case 36 /* MinusToken */:
-                case 43 /* LessThanLessThanToken */:
-                case 44 /* GreaterThanGreaterThanToken */:
-                case 45 /* GreaterThanGreaterThanGreaterThanToken */:
-                case 25 /* LessThanToken */:
-                case 27 /* GreaterThanToken */:
-                case 28 /* LessThanEqualsToken */:
-                case 29 /* GreaterThanEqualsToken */:
-                case 91 /* InstanceOfKeyword */:
-                case 90 /* InKeyword */:
-                case 116 /* AsKeyword */:
-                case 30 /* EqualsEqualsToken */:
-                case 31 /* ExclamationEqualsToken */:
-                case 32 /* EqualsEqualsEqualsToken */:
-                case 33 /* ExclamationEqualsEqualsToken */:
-                case 46 /* AmpersandToken */:
-                case 48 /* CaretToken */:
-                case 47 /* BarToken */:
-                case 51 /* AmpersandAmpersandToken */:
-                case 52 /* BarBarToken */:
-                case 67 /* BarEqualsToken */:
-                case 66 /* AmpersandEqualsToken */:
-                case 68 /* CaretEqualsToken */:
-                case 63 /* LessThanLessThanEqualsToken */:
-                case 64 /* GreaterThanGreaterThanEqualsToken */:
-                case 65 /* GreaterThanGreaterThanGreaterThanEqualsToken */:
-                case 57 /* PlusEqualsToken */:
-                case 58 /* MinusEqualsToken */:
-                case 59 /* AsteriskEqualsToken */:
-                case 61 /* SlashEqualsToken */:
-                case 62 /* PercentEqualsToken */:
-                case 56 /* EqualsToken */:
-                case 24 /* CommaToken */:
+                case 39 /* AsteriskToken */:
+                case 41 /* SlashToken */:
+                case 42 /* PercentToken */:
+                case 37 /* PlusToken */:
+                case 38 /* MinusToken */:
+                case 45 /* LessThanLessThanToken */:
+                case 46 /* GreaterThanGreaterThanToken */:
+                case 47 /* GreaterThanGreaterThanGreaterThanToken */:
+                case 27 /* LessThanToken */:
+                case 29 /* GreaterThanToken */:
+                case 30 /* LessThanEqualsToken */:
+                case 31 /* GreaterThanEqualsToken */:
+                case 93 /* InstanceOfKeyword */:
+                case 92 /* InKeyword */:
+                case 118 /* AsKeyword */:
+                case 32 /* EqualsEqualsToken */:
+                case 33 /* ExclamationEqualsToken */:
+                case 34 /* EqualsEqualsEqualsToken */:
+                case 35 /* ExclamationEqualsEqualsToken */:
+                case 48 /* AmpersandToken */:
+                case 50 /* CaretToken */:
+                case 49 /* BarToken */:
+                case 53 /* AmpersandAmpersandToken */:
+                case 54 /* BarBarToken */:
+                case 69 /* BarEqualsToken */:
+                case 68 /* AmpersandEqualsToken */:
+                case 70 /* CaretEqualsToken */:
+                case 65 /* LessThanLessThanEqualsToken */:
+                case 66 /* GreaterThanGreaterThanEqualsToken */:
+                case 67 /* GreaterThanGreaterThanGreaterThanEqualsToken */:
+                case 59 /* PlusEqualsToken */:
+                case 60 /* MinusEqualsToken */:
+                case 61 /* AsteriskEqualsToken */:
+                case 63 /* SlashEqualsToken */:
+                case 64 /* PercentEqualsToken */:
+                case 58 /* EqualsToken */:
+                case 26 /* CommaToken */:
                     return true;
                 default:
                     return false;
@@ -62894,19 +75139,19 @@ var ts;
         }
         function isPrefixUnaryExpressionOperatorToken(token) {
             switch (token) {
-                case 35 /* PlusToken */:
-                case 36 /* MinusToken */:
-                case 50 /* TildeToken */:
-                case 49 /* ExclamationToken */:
-                case 41 /* PlusPlusToken */:
-                case 42 /* MinusMinusToken */:
+                case 37 /* PlusToken */:
+                case 38 /* MinusToken */:
+                case 52 /* TildeToken */:
+                case 51 /* ExclamationToken */:
+                case 43 /* PlusPlusToken */:
+                case 44 /* MinusMinusToken */:
                     return true;
                 default:
                     return false;
             }
         }
         function isKeyword(token) {
-            return token >= 70 /* FirstKeyword */ && token <= 138 /* LastKeyword */;
+            return token >= 72 /* FirstKeyword */ && token <= 142 /* LastKeyword */;
         }
         function classFromKind(token) {
             if (isKeyword(token)) {
@@ -62915,7 +75160,7 @@ var ts;
             else if (isBinaryExpressionOperatorToken(token) || isPrefixUnaryExpressionOperatorToken(token)) {
                 return 5 /* operator */;
             }
-            else if (token >= 15 /* FirstPunctuation */ && token <= 68 /* LastPunctuation */) {
+            else if (token >= 17 /* FirstPunctuation */ && token <= 70 /* LastPunctuation */) {
                 return 10 /* punctuation */;
             }
             switch (token) {
@@ -62923,7 +75168,7 @@ var ts;
                     return 4 /* numericLiteral */;
                 case 9 /* StringLiteral */:
                     return 6 /* stringLiteral */;
-                case 10 /* RegularExpressionLiteral */:
+                case 12 /* RegularExpressionLiteral */:
                     return 7 /* regularExpressionLiteral */;
                 case 7 /* ConflictMarkerTrivia */:
                 case 3 /* MultiLineCommentTrivia */:
@@ -62932,7 +75177,7 @@ var ts;
                 case 5 /* WhitespaceTrivia */:
                 case 4 /* NewLineTrivia */:
                     return 8 /* whiteSpace */;
-                case 69 /* Identifier */:
+                case 71 /* Identifier */:
                 default:
                     if (ts.isTemplateLiteralKind(token)) {
                         return 6 /* stringLiteral */;
@@ -62963,10 +75208,10 @@ var ts;
         // That means we're calling back into the host around every 1.2k of the file we process.
         // Lib.d.ts has similar numbers.
         switch (kind) {
-            case 225 /* ModuleDeclaration */:
-            case 221 /* ClassDeclaration */:
-            case 222 /* InterfaceDeclaration */:
-            case 220 /* FunctionDeclaration */:
+            case 233 /* ModuleDeclaration */:
+            case 229 /* ClassDeclaration */:
+            case 230 /* InterfaceDeclaration */:
+            case 228 /* FunctionDeclaration */:
                 cancellationToken.throwIfCancellationRequested();
         }
     }
@@ -63017,7 +75262,7 @@ var ts;
              */
             function hasValueSideModule(symbol) {
                 return ts.forEach(symbol.declarations, function (declaration) {
-                    return declaration.kind === 225 /* ModuleDeclaration */ &&
+                    return declaration.kind === 233 /* ModuleDeclaration */ &&
                         ts.getModuleInstanceState(declaration) === 1 /* Instantiated */;
                 });
             }
@@ -63027,12 +75272,12 @@ var ts;
             if (node && ts.textSpanIntersectsWith(span, node.getFullStart(), node.getFullWidth())) {
                 var kind = node.kind;
                 checkForClassificationCancellation(cancellationToken, kind);
-                if (kind === 69 /* Identifier */ && !ts.nodeIsMissing(node)) {
+                if (kind === 71 /* Identifier */ && !ts.nodeIsMissing(node)) {
                     var identifier = node;
                     // Only bother calling into the typechecker if this is an identifier that
                     // could possibly resolve to a type name.  This makes classification run
                     // in a third of the time it would normally take.
-                    if (classifiableNames[identifier.text]) {
+                    if (classifiableNames.get(identifier.text)) {
                         var symbol = typeChecker.getSymbolAtLocation(node);
                         if (symbol) {
                             var type = classifySymbol(symbol, ts.getMeaningFromLocation(node));
@@ -63049,36 +75294,36 @@ var ts;
     ts.getEncodedSemanticClassifications = getEncodedSemanticClassifications;
     function getClassificationTypeName(type) {
         switch (type) {
-            case 1 /* comment */: return ts.ClassificationTypeNames.comment;
-            case 2 /* identifier */: return ts.ClassificationTypeNames.identifier;
-            case 3 /* keyword */: return ts.ClassificationTypeNames.keyword;
-            case 4 /* numericLiteral */: return ts.ClassificationTypeNames.numericLiteral;
-            case 5 /* operator */: return ts.ClassificationTypeNames.operator;
-            case 6 /* stringLiteral */: return ts.ClassificationTypeNames.stringLiteral;
-            case 8 /* whiteSpace */: return ts.ClassificationTypeNames.whiteSpace;
-            case 9 /* text */: return ts.ClassificationTypeNames.text;
-            case 10 /* punctuation */: return ts.ClassificationTypeNames.punctuation;
-            case 11 /* className */: return ts.ClassificationTypeNames.className;
-            case 12 /* enumName */: return ts.ClassificationTypeNames.enumName;
-            case 13 /* interfaceName */: return ts.ClassificationTypeNames.interfaceName;
-            case 14 /* moduleName */: return ts.ClassificationTypeNames.moduleName;
-            case 15 /* typeParameterName */: return ts.ClassificationTypeNames.typeParameterName;
-            case 16 /* typeAliasName */: return ts.ClassificationTypeNames.typeAliasName;
-            case 17 /* parameterName */: return ts.ClassificationTypeNames.parameterName;
-            case 18 /* docCommentTagName */: return ts.ClassificationTypeNames.docCommentTagName;
-            case 19 /* jsxOpenTagName */: return ts.ClassificationTypeNames.jsxOpenTagName;
-            case 20 /* jsxCloseTagName */: return ts.ClassificationTypeNames.jsxCloseTagName;
-            case 21 /* jsxSelfClosingTagName */: return ts.ClassificationTypeNames.jsxSelfClosingTagName;
-            case 22 /* jsxAttribute */: return ts.ClassificationTypeNames.jsxAttribute;
-            case 23 /* jsxText */: return ts.ClassificationTypeNames.jsxText;
-            case 24 /* jsxAttributeStringLiteralValue */: return ts.ClassificationTypeNames.jsxAttributeStringLiteralValue;
+            case 1 /* comment */: return "comment" /* comment */;
+            case 2 /* identifier */: return "identifier" /* identifier */;
+            case 3 /* keyword */: return "keyword" /* keyword */;
+            case 4 /* numericLiteral */: return "number" /* numericLiteral */;
+            case 5 /* operator */: return "operator" /* operator */;
+            case 6 /* stringLiteral */: return "string" /* stringLiteral */;
+            case 8 /* whiteSpace */: return "whitespace" /* whiteSpace */;
+            case 9 /* text */: return "text" /* text */;
+            case 10 /* punctuation */: return "punctuation" /* punctuation */;
+            case 11 /* className */: return "class name" /* className */;
+            case 12 /* enumName */: return "enum name" /* enumName */;
+            case 13 /* interfaceName */: return "interface name" /* interfaceName */;
+            case 14 /* moduleName */: return "module name" /* moduleName */;
+            case 15 /* typeParameterName */: return "type parameter name" /* typeParameterName */;
+            case 16 /* typeAliasName */: return "type alias name" /* typeAliasName */;
+            case 17 /* parameterName */: return "parameter name" /* parameterName */;
+            case 18 /* docCommentTagName */: return "doc comment tag name" /* docCommentTagName */;
+            case 19 /* jsxOpenTagName */: return "jsx open tag name" /* jsxOpenTagName */;
+            case 20 /* jsxCloseTagName */: return "jsx close tag name" /* jsxCloseTagName */;
+            case 21 /* jsxSelfClosingTagName */: return "jsx self closing tag name" /* jsxSelfClosingTagName */;
+            case 22 /* jsxAttribute */: return "jsx attribute" /* jsxAttribute */;
+            case 23 /* jsxText */: return "jsx text" /* jsxText */;
+            case 24 /* jsxAttributeStringLiteralValue */: return "jsx attribute string literal value" /* jsxAttributeStringLiteralValue */;
         }
     }
     function convertClassifications(classifications) {
         ts.Debug.assert(classifications.spans.length % 3 === 0);
         var dense = classifications.spans;
         var result = [];
-        for (var i = 0, n = dense.length; i < n; i += 3) {
+        for (var i = 0; i < dense.length; i += 3) {
             result.push({
                 textSpan: ts.createTextSpan(dense[i], dense[i + 1]),
                 classificationType: getClassificationTypeName(dense[i + 2])
@@ -63096,8 +75341,8 @@ var ts;
         var spanStart = span.start;
         var spanLength = span.length;
         // Make a scanner we can get trivia from.
-        var triviaScanner = ts.createScanner(2 /* Latest */, /*skipTrivia*/ false, sourceFile.languageVariant, sourceFile.text);
-        var mergeConflictScanner = ts.createScanner(2 /* Latest */, /*skipTrivia*/ false, sourceFile.languageVariant, sourceFile.text);
+        var triviaScanner = ts.createScanner(5 /* Latest */, /*skipTrivia*/ false, sourceFile.languageVariant, sourceFile.text);
+        var mergeConflictScanner = ts.createScanner(5 /* Latest */, /*skipTrivia*/ false, sourceFile.languageVariant, sourceFile.text);
         var result = [];
         processElement(sourceFile);
         return { spans: result, endOfLineState: 0 /* None */ };
@@ -63143,9 +75388,9 @@ var ts;
                         pushClassification(start, width, 1 /* comment */);
                         continue;
                     }
-                    // for the ======== add a comment for the first line, and then lex all
-                    // subsequent lines up until the end of the conflict marker.
-                    ts.Debug.assert(ch === 61 /* equals */);
+                    // for the ||||||| and ======== markers, add a comment for the first line,
+                    // and then lex all subsequent lines up until the end of the conflict marker.
+                    ts.Debug.assert(ch === 124 /* bar */ || ch === 61 /* equals */);
                     classifyDisabledMergeCode(text, start, end);
                 }
             }
@@ -63177,20 +75422,20 @@ var ts;
                     if (tag.pos !== pos) {
                         pushCommentRange(pos, tag.pos - pos);
                     }
-                    pushClassification(tag.atToken.pos, tag.atToken.end - tag.atToken.pos, 10 /* punctuation */);
-                    pushClassification(tag.tagName.pos, tag.tagName.end - tag.tagName.pos, 18 /* docCommentTagName */);
+                    pushClassification(tag.atToken.pos, tag.atToken.end - tag.atToken.pos, 10 /* punctuation */); // "@"
+                    pushClassification(tag.tagName.pos, tag.tagName.end - tag.tagName.pos, 18 /* docCommentTagName */); // e.g. "param"
                     pos = tag.tagName.end;
                     switch (tag.kind) {
-                        case 275 /* JSDocParameterTag */:
+                        case 287 /* JSDocParameterTag */:
                             processJSDocParameterTag(tag);
                             break;
-                        case 278 /* JSDocTemplateTag */:
+                        case 290 /* JSDocTemplateTag */:
                             processJSDocTemplateTag(tag);
                             break;
-                        case 277 /* JSDocTypeTag */:
+                        case 289 /* JSDocTypeTag */:
                             processElement(tag.typeExpression);
                             break;
-                        case 276 /* JSDocReturnTag */:
+                        case 288 /* JSDocReturnTag */:
                             processElement(tag.typeExpression);
                             break;
                     }
@@ -63226,8 +75471,8 @@ var ts;
             }
         }
         function classifyDisabledMergeCode(text, start, end) {
-            // Classify the line that the ======= marker is on as a comment.  Then just lex
-            // all further tokens and add them to the result.
+            // Classify the line that the ||||||| or ======= marker is on as a comment.
+            // Then just lex all further tokens and add them to the result.
             var i;
             for (i = start; i < end; i++) {
                 if (ts.isLineBreak(text.charCodeAt(i))) {
@@ -63254,17 +75499,17 @@ var ts;
          * False will mean that node is not classified and traverse routine should recurse into node contents.
          */
         function tryClassifyNode(node) {
-            if (ts.isJSDocTag(node)) {
+            if (ts.isJSDoc(node)) {
                 return true;
             }
             if (ts.nodeIsMissing(node)) {
                 return true;
             }
             var classifiedElementName = tryClassifyJsxElementName(node);
-            if (!ts.isToken(node) && node.kind !== 244 /* JsxText */ && classifiedElementName === undefined) {
+            if (!ts.isToken(node) && node.kind !== 10 /* JsxText */ && classifiedElementName === undefined) {
                 return false;
             }
-            var tokenStart = node.kind === 244 /* JsxText */ ? node.pos : classifyLeadingTriviaAndGetTokenStart(node);
+            var tokenStart = node.kind === 10 /* JsxText */ ? node.pos : classifyLeadingTriviaAndGetTokenStart(node);
             var tokenWidth = node.end - tokenStart;
             ts.Debug.assert(tokenWidth >= 0);
             if (tokenWidth > 0) {
@@ -63277,22 +75522,22 @@ var ts;
         }
         function tryClassifyJsxElementName(token) {
             switch (token.parent && token.parent.kind) {
-                case 243 /* JsxOpeningElement */:
+                case 251 /* JsxOpeningElement */:
                     if (token.parent.tagName === token) {
                         return 19 /* jsxOpenTagName */;
                     }
                     break;
-                case 245 /* JsxClosingElement */:
+                case 252 /* JsxClosingElement */:
                     if (token.parent.tagName === token) {
                         return 20 /* jsxCloseTagName */;
                     }
                     break;
-                case 242 /* JsxSelfClosingElement */:
+                case 250 /* JsxSelfClosingElement */:
                     if (token.parent.tagName === token) {
                         return 21 /* jsxSelfClosingTagName */;
                     }
                     break;
-                case 246 /* JsxAttribute */:
+                case 253 /* JsxAttribute */:
                     if (token.parent.name === token) {
                         return 22 /* jsxAttribute */;
                     }
@@ -63309,7 +75554,7 @@ var ts;
             }
             // Special case < and >  If they appear in a generic context they are punctuation,
             // not operators.
-            if (tokenKind === 25 /* LessThanToken */ || tokenKind === 27 /* GreaterThanToken */) {
+            if (tokenKind === 27 /* LessThanToken */ || tokenKind === 29 /* GreaterThanToken */) {
                 // If the node owning the token has a type argument list or type parameter list, then
                 // we can effectively assume that a '<' and '>' belong to those lists.
                 if (token && ts.getTypeArgumentOrTypeParameterList(token.parent)) {
@@ -63318,19 +75563,19 @@ var ts;
             }
             if (ts.isPunctuation(tokenKind)) {
                 if (token) {
-                    if (tokenKind === 56 /* EqualsToken */) {
+                    if (tokenKind === 58 /* EqualsToken */) {
                         // the '=' in a variable declaration is special cased here.
-                        if (token.parent.kind === 218 /* VariableDeclaration */ ||
-                            token.parent.kind === 145 /* PropertyDeclaration */ ||
-                            token.parent.kind === 142 /* Parameter */ ||
-                            token.parent.kind === 246 /* JsxAttribute */) {
+                        if (token.parent.kind === 226 /* VariableDeclaration */ ||
+                            token.parent.kind === 149 /* PropertyDeclaration */ ||
+                            token.parent.kind === 146 /* Parameter */ ||
+                            token.parent.kind === 253 /* JsxAttribute */) {
                             return 5 /* operator */;
                         }
                     }
-                    if (token.parent.kind === 187 /* BinaryExpression */ ||
-                        token.parent.kind === 185 /* PrefixUnaryExpression */ ||
-                        token.parent.kind === 186 /* PostfixUnaryExpression */ ||
-                        token.parent.kind === 188 /* ConditionalExpression */) {
+                    if (token.parent.kind === 194 /* BinaryExpression */ ||
+                        token.parent.kind === 192 /* PrefixUnaryExpression */ ||
+                        token.parent.kind === 193 /* PostfixUnaryExpression */ ||
+                        token.parent.kind === 195 /* ConditionalExpression */) {
                         return 5 /* operator */;
                     }
                 }
@@ -63340,9 +75585,9 @@ var ts;
                 return 4 /* numericLiteral */;
             }
             else if (tokenKind === 9 /* StringLiteral */) {
-                return token.parent.kind === 246 /* JsxAttribute */ ? 24 /* jsxAttributeStringLiteralValue */ : 6 /* stringLiteral */;
+                return token.parent.kind === 253 /* JsxAttribute */ ? 24 /* jsxAttributeStringLiteralValue */ : 6 /* stringLiteral */;
             }
-            else if (tokenKind === 10 /* RegularExpressionLiteral */) {
+            else if (tokenKind === 12 /* RegularExpressionLiteral */) {
                 // TODO: we should get another classification type for these literals.
                 return 6 /* stringLiteral */;
             }
@@ -63350,41 +75595,40 @@ var ts;
                 // TODO (drosen): we should *also* get another classification type for these literals.
                 return 6 /* stringLiteral */;
             }
-            else if (tokenKind === 244 /* JsxText */) {
+            else if (tokenKind === 10 /* JsxText */) {
                 return 23 /* jsxText */;
             }
-            else if (tokenKind === 69 /* Identifier */) {
+            else if (tokenKind === 71 /* Identifier */) {
                 if (token) {
                     switch (token.parent.kind) {
-                        case 221 /* ClassDeclaration */:
+                        case 229 /* ClassDeclaration */:
                             if (token.parent.name === token) {
                                 return 11 /* className */;
                             }
                             return;
-                        case 141 /* TypeParameter */:
+                        case 145 /* TypeParameter */:
                             if (token.parent.name === token) {
                                 return 15 /* typeParameterName */;
                             }
                             return;
-                        case 222 /* InterfaceDeclaration */:
+                        case 230 /* InterfaceDeclaration */:
                             if (token.parent.name === token) {
                                 return 13 /* interfaceName */;
                             }
                             return;
-                        case 224 /* EnumDeclaration */:
+                        case 232 /* EnumDeclaration */:
                             if (token.parent.name === token) {
                                 return 12 /* enumName */;
                             }
                             return;
-                        case 225 /* ModuleDeclaration */:
+                        case 233 /* ModuleDeclaration */:
                             if (token.parent.name === token) {
                                 return 14 /* moduleName */;
                             }
                             return;
-                        case 142 /* Parameter */:
+                        case 146 /* Parameter */:
                             if (token.parent.name === token) {
-                                var isThis_1 = token.kind === 69 /* Identifier */ && token.originalKeywordKind === 97 /* ThisKeyword */;
-                                return isThis_1 ? 3 /* keyword */ : 17 /* parameterName */;
+                                return ts.isThisIdentifier(token) ? 3 /* keyword */ : 17 /* parameterName */;
                             }
                             return;
                     }
@@ -63399,9 +75643,8 @@ var ts;
             // Ignore nodes that don't intersect the original span to classify.
             if (ts.decodedTextSpanIntersectsWith(spanStart, spanLength, element.pos, element.getFullWidth())) {
                 checkForClassificationCancellation(cancellationToken, element.kind);
-                var children = element.getChildren(sourceFile);
-                for (var i = 0, n = children.length; i < n; i++) {
-                    var child = children[i];
+                for (var _i = 0, _a = element.getChildren(sourceFile); _i < _a.length; _i++) {
+                    var child = _a[_i];
                     if (!tryClassifyNode(child)) {
                         // Recurse into our child nodes.
                         processElement(child);
@@ -63417,258 +75660,35 @@ var ts;
 (function (ts) {
     var Completions;
     (function (Completions) {
-        function getCompletionsAtPosition(host, typeChecker, log, compilerOptions, sourceFile, position) {
-            if (ts.isInReferenceComment(sourceFile, position)) {
-                return getTripleSlashReferenceCompletion(sourceFile, position);
-            }
-            if (ts.isInString(sourceFile, position)) {
-                return getStringLiteralCompletionEntries(sourceFile, position);
-            }
-            var completionData = getCompletionData(typeChecker, log, sourceFile, position);
-            if (!completionData) {
-                return undefined;
-            }
-            var symbols = completionData.symbols, isMemberCompletion = completionData.isMemberCompletion, isNewIdentifierLocation = completionData.isNewIdentifierLocation, location = completionData.location, isJsDocTagName = completionData.isJsDocTagName;
-            if (isJsDocTagName) {
-                // If the current position is a jsDoc tag name, only tag names should be provided for completion
-                return { isMemberCompletion: false, isNewIdentifierLocation: false, entries: ts.JsDoc.getAllJsDocCompletionEntries() };
-            }
-            var entries = [];
-            if (ts.isSourceFileJavaScript(sourceFile)) {
-                var uniqueNames = getCompletionEntriesFromSymbols(symbols, entries, location, /*performCharacterChecks*/ false);
-                ts.addRange(entries, getJavaScriptCompletionEntries(sourceFile, location.pos, uniqueNames));
-            }
-            else {
-                if (!symbols || symbols.length === 0) {
-                    if (sourceFile.languageVariant === 1 /* JSX */ &&
-                        location.parent && location.parent.kind === 245 /* JsxClosingElement */) {
-                        // In the TypeScript JSX element, if such element is not defined. When users query for completion at closing tag,
-                        // instead of simply giving unknown value, the completion will return the tag-name of an associated opening-element.
-                        // For example:
-                        //     var x = <div> </ /*1*/>  completion list at "1" will contain "div" with type any
-                        var tagName = location.parent.parent.openingElement.tagName;
-                        entries.push({
-                            name: tagName.text,
-                            kind: undefined,
-                            kindModifiers: undefined,
-                            sortText: "0",
-                        });
-                    }
-                    else {
-                        return undefined;
-                    }
-                }
-                getCompletionEntriesFromSymbols(symbols, entries, location, /*performCharacterChecks*/ true);
-            }
-            // Add keywords if this is not a member completion list
-            if (!isMemberCompletion && !isJsDocTagName) {
-                ts.addRange(entries, keywordCompletions);
-            }
-            return { isMemberCompletion: isMemberCompletion, isNewIdentifierLocation: isNewIdentifierLocation, entries: entries };
-            function getJavaScriptCompletionEntries(sourceFile, position, uniqueNames) {
-                var entries = [];
-                var nameTable = ts.getNameTable(sourceFile);
-                for (var name_49 in nameTable) {
-                    // Skip identifiers produced only from the current location
-                    if (nameTable[name_49] === position) {
-                        continue;
-                    }
-                    if (!uniqueNames[name_49]) {
-                        uniqueNames[name_49] = name_49;
-                        var displayName = getCompletionEntryDisplayName(ts.unescapeIdentifier(name_49), compilerOptions.target, /*performCharacterChecks*/ true);
-                        if (displayName) {
-                            var entry = {
-                                name: displayName,
-                                kind: ts.ScriptElementKind.warning,
-                                kindModifiers: "",
-                                sortText: "1"
-                            };
-                            entries.push(entry);
-                        }
-                    }
-                }
-                return entries;
-            }
-            function createCompletionEntry(symbol, location, performCharacterChecks) {
-                // Try to get a valid display name for this symbol, if we could not find one, then ignore it.
-                // We would like to only show things that can be added after a dot, so for instance numeric properties can
-                // not be accessed with a dot (a.1 <- invalid)
-                var displayName = getCompletionEntryDisplayNameForSymbol(typeChecker, symbol, compilerOptions.target, performCharacterChecks, location);
-                if (!displayName) {
-                    return undefined;
-                }
-                // TODO(drosen): Right now we just permit *all* semantic meanings when calling
-                // 'getSymbolKind' which is permissible given that it is backwards compatible; but
-                // really we should consider passing the meaning for the node so that we don't report
-                // that a suggestion for a value is an interface.  We COULD also just do what
-                // 'getSymbolModifiers' does, which is to use the first declaration.
-                // Use a 'sortText' of 0' so that all symbol completion entries come before any other
-                // entries (like JavaScript identifier entries).
-                return {
-                    name: displayName,
-                    kind: ts.SymbolDisplay.getSymbolKind(typeChecker, symbol, location),
-                    kindModifiers: ts.SymbolDisplay.getSymbolModifiers(symbol),
-                    sortText: "0",
-                };
-            }
-            function getCompletionEntriesFromSymbols(symbols, entries, location, performCharacterChecks) {
-                var start = ts.timestamp();
-                var uniqueNames = ts.createMap();
-                if (symbols) {
-                    for (var _i = 0, symbols_4 = symbols; _i < symbols_4.length; _i++) {
-                        var symbol = symbols_4[_i];
-                        var entry = createCompletionEntry(symbol, location, performCharacterChecks);
-                        if (entry) {
-                            var id = ts.escapeIdentifier(entry.name);
-                            if (!uniqueNames[id]) {
-                                entries.push(entry);
-                                uniqueNames[id] = id;
-                            }
-                        }
-                    }
-                }
-                log("getCompletionsAtPosition: getCompletionEntriesFromSymbols: " + (ts.timestamp() - start));
-                return uniqueNames;
-            }
-            function getStringLiteralCompletionEntries(sourceFile, position) {
-                var node = ts.findPrecedingToken(position, sourceFile);
-                if (!node || node.kind !== 9 /* StringLiteral */) {
-                    return undefined;
-                }
-                if (node.parent.kind === 253 /* PropertyAssignment */ && node.parent.parent.kind === 171 /* ObjectLiteralExpression */) {
-                    // Get quoted name of properties of the object literal expression
-                    // i.e. interface ConfigFiles {
-                    //          'jspm:dev': string
-                    //      }
-                    //      let files: ConfigFiles = {
-                    //          '/*completion position*/'
-                    //      }
-                    //
-                    //      function foo(c: ConfigFiles) {}
-                    //      foo({
-                    //          '/*completion position*/'
-                    //      });
-                    return getStringLiteralCompletionEntriesFromPropertyAssignment(node.parent);
-                }
-                else if (ts.isElementAccessExpression(node.parent) && node.parent.argumentExpression === node) {
-                    // Get all names of properties on the expression
-                    // i.e. interface A {
-                    //      'prop1': string
-                    // }
-                    // let a: A;
-                    // a['/*completion position*/']
-                    return getStringLiteralCompletionEntriesFromElementAccess(node.parent);
-                }
-                else if (node.parent.kind === 230 /* ImportDeclaration */ || ts.isExpressionOfExternalModuleImportEqualsDeclaration(node) || ts.isRequireCall(node.parent, false)) {
-                    // Get all known external module names or complete a path to a module
-                    // i.e. import * as ns from "/*completion position*/";
-                    //      import x = require("/*completion position*/");
-                    //      var y = require("/*completion position*/");
-                    return getStringLiteralCompletionEntriesFromModuleNames(node);
-                }
-                else {
-                    var argumentInfo = ts.SignatureHelp.getContainingArgumentInfo(node, position, sourceFile);
-                    if (argumentInfo) {
-                        // Get string literal completions from specialized signatures of the target
-                        // i.e. declare function f(a: 'A');
-                        // f("/*completion position*/")
-                        return getStringLiteralCompletionEntriesFromCallExpression(argumentInfo, node);
-                    }
-                    // Get completion for string literal from string literal type
-                    // i.e. var x: "hi" | "hello" = "/*completion position*/"
-                    return getStringLiteralCompletionEntriesFromContextualType(node);
-                }
-            }
-            function getStringLiteralCompletionEntriesFromPropertyAssignment(element) {
-                var type = typeChecker.getContextualType(element.parent);
-                var entries = [];
-                if (type) {
-                    getCompletionEntriesFromSymbols(type.getApparentProperties(), entries, element, /*performCharacterChecks*/ false);
-                    if (entries.length) {
-                        return { isMemberCompletion: true, isNewIdentifierLocation: true, entries: entries };
-                    }
-                }
-            }
-            function getStringLiteralCompletionEntriesFromCallExpression(argumentInfo, location) {
-                var candidates = [];
-                var entries = [];
-                typeChecker.getResolvedSignature(argumentInfo.invocation, candidates);
-                for (var _i = 0, candidates_3 = candidates; _i < candidates_3.length; _i++) {
-                    var candidate = candidates_3[_i];
-                    if (candidate.parameters.length > argumentInfo.argumentIndex) {
-                        var parameter = candidate.parameters[argumentInfo.argumentIndex];
-                        addStringLiteralCompletionsFromType(typeChecker.getTypeAtLocation(parameter.valueDeclaration), entries);
-                    }
-                }
-                if (entries.length) {
-                    return { isMemberCompletion: false, isNewIdentifierLocation: true, entries: entries };
-                }
-                return undefined;
-            }
-            function getStringLiteralCompletionEntriesFromElementAccess(node) {
-                var type = typeChecker.getTypeAtLocation(node.expression);
-                var entries = [];
-                if (type) {
-                    getCompletionEntriesFromSymbols(type.getApparentProperties(), entries, node, /*performCharacterChecks*/ false);
-                    if (entries.length) {
-                        return { isMemberCompletion: true, isNewIdentifierLocation: true, entries: entries };
-                    }
-                }
-                return undefined;
-            }
-            function getStringLiteralCompletionEntriesFromContextualType(node) {
-                var type = typeChecker.getContextualType(node);
-                if (type) {
-                    var entries_2 = [];
-                    addStringLiteralCompletionsFromType(type, entries_2);
-                    if (entries_2.length) {
-                        return { isMemberCompletion: false, isNewIdentifierLocation: false, entries: entries_2 };
-                    }
-                }
-                return undefined;
-            }
-            function addStringLiteralCompletionsFromType(type, result) {
-                if (!type) {
-                    return;
-                }
-                if (type.flags & 524288 /* Union */) {
-                    ts.forEach(type.types, function (t) { return addStringLiteralCompletionsFromType(t, result); });
-                }
-                else {
-                    if (type.flags & 32 /* StringLiteral */) {
-                        result.push({
-                            name: type.text,
-                            kindModifiers: ts.ScriptElementKindModifier.none,
-                            kind: ts.ScriptElementKind.variableElement,
-                            sortText: "0"
-                        });
-                    }
-                }
-            }
-            function getStringLiteralCompletionEntriesFromModuleNames(node) {
+        var PathCompletions;
+        (function (PathCompletions) {
+            function getStringLiteralCompletionEntriesFromModuleNames(node, compilerOptions, host, typeChecker) {
                 var literalValue = ts.normalizeSlashes(node.text);
                 var scriptPath = node.getSourceFile().path;
                 var scriptDirectory = ts.getDirectoryPath(scriptPath);
                 var span = getDirectoryFragmentTextSpan(node.text, node.getStart() + 1);
                 var entries;
                 if (isPathRelativeToScript(literalValue) || ts.isRootedDiskPath(literalValue)) {
+                    var extensions = ts.getSupportedExtensions(compilerOptions);
                     if (compilerOptions.rootDirs) {
-                        entries = getCompletionEntriesForDirectoryFragmentWithRootDirs(compilerOptions.rootDirs, literalValue, scriptDirectory, ts.getSupportedExtensions(compilerOptions), /*includeExtensions*/ false, span, scriptPath);
+                        entries = getCompletionEntriesForDirectoryFragmentWithRootDirs(compilerOptions.rootDirs, literalValue, scriptDirectory, extensions, /*includeExtensions*/ false, span, compilerOptions, host, scriptPath);
                     }
                     else {
-                        entries = getCompletionEntriesForDirectoryFragment(literalValue, scriptDirectory, ts.getSupportedExtensions(compilerOptions), /*includeExtensions*/ false, span, scriptPath);
+                        entries = getCompletionEntriesForDirectoryFragment(literalValue, scriptDirectory, extensions, /*includeExtensions*/ false, span, host, scriptPath);
                     }
                 }
                 else {
                     // Check for node modules
-                    entries = getCompletionEntriesForNonRelativeModules(literalValue, scriptDirectory, span);
+                    entries = getCompletionEntriesForNonRelativeModules(literalValue, scriptDirectory, span, compilerOptions, host, typeChecker);
                 }
                 return {
+                    isGlobalCompletion: false,
                     isMemberCompletion: false,
                     isNewIdentifierLocation: true,
                     entries: entries
                 };
             }
+            PathCompletions.getStringLiteralCompletionEntriesFromModuleNames = getStringLiteralCompletionEntriesFromModuleNames;
             /**
              * Takes a script path and returns paths for all potential folders that could be merged with its
              * containing folder via the "rootDirs" compiler option
@@ -63688,26 +75708,35 @@ var ts;
                 // Now find a path for each potential directory that is to be merged with the one containing the script
                 return ts.deduplicate(ts.map(rootDirs, function (rootDirectory) { return ts.combinePaths(rootDirectory, relativeDirectory); }));
             }
-            function getCompletionEntriesForDirectoryFragmentWithRootDirs(rootDirs, fragment, scriptPath, extensions, includeExtensions, span, exclude) {
+            function getCompletionEntriesForDirectoryFragmentWithRootDirs(rootDirs, fragment, scriptPath, extensions, includeExtensions, span, compilerOptions, host, exclude) {
                 var basePath = compilerOptions.project || host.getCurrentDirectory();
                 var ignoreCase = !(host.useCaseSensitiveFileNames && host.useCaseSensitiveFileNames());
                 var baseDirectories = getBaseDirectoriesFromRootDirs(rootDirs, basePath, scriptPath, ignoreCase);
                 var result = [];
                 for (var _i = 0, baseDirectories_1 = baseDirectories; _i < baseDirectories_1.length; _i++) {
                     var baseDirectory = baseDirectories_1[_i];
-                    getCompletionEntriesForDirectoryFragment(fragment, baseDirectory, extensions, includeExtensions, span, exclude, result);
+                    getCompletionEntriesForDirectoryFragment(fragment, baseDirectory, extensions, includeExtensions, span, host, exclude, result);
                 }
                 return result;
             }
-            function getCompletionEntriesForDirectoryFragment(fragment, scriptPath, extensions, includeExtensions, span, exclude, result) {
+            /**
+             * Given a path ending at a directory, gets the completions for the path, and filters for those entries containing the basename.
+             */
+            function getCompletionEntriesForDirectoryFragment(fragment, scriptPath, extensions, includeExtensions, span, host, exclude, result) {
                 if (result === void 0) { result = []; }
-                fragment = ts.getDirectoryPath(fragment);
-                if (!fragment) {
-                    fragment = "./";
+                if (fragment === undefined) {
+                    fragment = "";
                 }
-                else {
-                    fragment = ts.ensureTrailingDirectorySeparator(fragment);
+                fragment = ts.normalizeSlashes(fragment);
+                /**
+                 * Remove the basename from the path. Note that we don't use the basename to filter completions;
+                 * the client is responsible for refining completions.
+                 */
+                fragment = ts.getDirectoryPath(fragment);
+                if (fragment === "") {
+                    fragment = "." + ts.directorySeparator;
                 }
+                fragment = ts.ensureTrailingDirectorySeparator(fragment);
                 var absolutePath = normalizeAndPreserveTrailingSlash(ts.isRootedDiskPath(fragment) ? fragment : ts.combinePaths(scriptPath, fragment));
                 var baseDirectory = ts.getDirectoryPath(absolutePath);
                 var ignoreCase = !(host.useCaseSensitiveFileNames && host.useCaseSensitiveFileNames());
@@ -63715,6 +75744,12 @@ var ts;
                     // Enumerate the available files if possible
                     var files = tryReadDirectory(host, baseDirectory, extensions, /*exclude*/ undefined, /*include*/ ["./*"]);
                     if (files) {
+                        /**
+                         * Multiple file entries might map to the same truncated name once we remove extensions
+                         * (happens iff includeExtensions === false)so we use a set-like data structure. Eg:
+                         *
+                         * both foo.ts and foo.tsx become foo
+                         */
                         var foundFiles = ts.createMap();
                         for (var _i = 0, files_4 = files; _i < files_4.length; _i++) {
                             var filePath = files_4[_i];
@@ -63723,13 +75758,13 @@ var ts;
                                 continue;
                             }
                             var foundFileName = includeExtensions ? ts.getBaseFileName(filePath) : ts.removeFileExtension(ts.getBaseFileName(filePath));
-                            if (!foundFiles[foundFileName]) {
-                                foundFiles[foundFileName] = true;
+                            if (!foundFiles.get(foundFileName)) {
+                                foundFiles.set(foundFileName, true);
                             }
                         }
-                        for (var foundFile in foundFiles) {
-                            result.push(createCompletionEntryForModule(foundFile, ts.ScriptElementKind.scriptElement, span));
-                        }
+                        ts.forEachKey(foundFiles, function (foundFile) {
+                            result.push(createCompletionEntryForModule(foundFile, "script" /* scriptElement */, span));
+                        });
                     }
                     // If possible, get folder completion as well
                     var directories = tryGetDirectories(host, baseDirectory);
@@ -63737,7 +75772,7 @@ var ts;
                         for (var _a = 0, directories_2 = directories; _a < directories_2.length; _a++) {
                             var directory = directories_2[_a];
                             var directoryName = ts.getBaseFileName(ts.normalizePath(directory));
-                            result.push(createCompletionEntryForModule(directoryName, ts.ScriptElementKind.directory, span));
+                            result.push(createCompletionEntryForModule(directoryName, "directory" /* directory */, span));
                         }
                     }
                 }
@@ -63750,14 +75785,14 @@ var ts;
              *      Modules from node_modules (i.e. those listed in package.json)
              *          This includes all files that are found in node_modules/moduleName/ with acceptable file extensions
              */
-            function getCompletionEntriesForNonRelativeModules(fragment, scriptPath, span) {
+            function getCompletionEntriesForNonRelativeModules(fragment, scriptPath, span, compilerOptions, host, typeChecker) {
                 var baseUrl = compilerOptions.baseUrl, paths = compilerOptions.paths;
                 var result;
                 if (baseUrl) {
                     var fileExtensions = ts.getSupportedExtensions(compilerOptions);
                     var projectDir = compilerOptions.project || host.getCurrentDirectory();
                     var absolute = ts.isRootedDiskPath(baseUrl) ? baseUrl : ts.combinePaths(projectDir, baseUrl);
-                    result = getCompletionEntriesForDirectoryFragment(fragment, ts.normalizePath(absolute), fileExtensions, /*includeExtensions*/ false, span);
+                    result = getCompletionEntriesForDirectoryFragment(fragment, ts.normalizePath(absolute), fileExtensions, /*includeExtensions*/ false, span, host);
                     if (paths) {
                         for (var path in paths) {
                             if (paths.hasOwnProperty(path)) {
@@ -63765,9 +75800,9 @@ var ts;
                                     if (paths[path]) {
                                         for (var _i = 0, _a = paths[path]; _i < _a.length; _i++) {
                                             var pattern = _a[_i];
-                                            for (var _b = 0, _c = getModulesForPathsPattern(fragment, baseUrl, pattern, fileExtensions); _b < _c.length; _b++) {
+                                            for (var _b = 0, _c = getModulesForPathsPattern(fragment, baseUrl, pattern, fileExtensions, host); _b < _c.length; _b++) {
                                                 var match = _c[_b];
-                                                result.push(createCompletionEntryForModule(match, ts.ScriptElementKind.externalModuleName, span));
+                                                result.push(createCompletionEntryForModule(match, "external module name" /* externalModuleName */, span));
                                             }
                                         }
                                     }
@@ -63775,7 +75810,7 @@ var ts;
                                 else if (ts.startsWith(path, fragment)) {
                                     var entry = paths[path] && paths[path].length === 1 && paths[path][0];
                                     if (entry) {
-                                        result.push(createCompletionEntryForModule(path, ts.ScriptElementKind.externalModuleName, span));
+                                        result.push(createCompletionEntryForModule(path, "external module name" /* externalModuleName */, span));
                                     }
                                 }
                             }
@@ -63786,13 +75821,13 @@ var ts;
                     result = [];
                 }
                 getCompletionEntriesFromTypings(host, compilerOptions, scriptPath, span, result);
-                for (var _d = 0, _e = enumeratePotentialNonRelativeModules(fragment, scriptPath, compilerOptions); _d < _e.length; _d++) {
+                for (var _d = 0, _e = enumeratePotentialNonRelativeModules(fragment, scriptPath, compilerOptions, typeChecker, host); _d < _e.length; _d++) {
                     var moduleName = _e[_d];
-                    result.push(createCompletionEntryForModule(moduleName, ts.ScriptElementKind.externalModuleName, span));
+                    result.push(createCompletionEntryForModule(moduleName, "external module name" /* externalModuleName */, span));
                 }
                 return result;
             }
-            function getModulesForPathsPattern(fragment, baseUrl, pattern, fileExtensions) {
+            function getModulesForPathsPattern(fragment, baseUrl, pattern, fileExtensions, host) {
                 if (host.readDirectory) {
                     var parsed = ts.hasZeroOrOneAsteriskCharacter(pattern) ? ts.tryParsePattern(pattern) : undefined;
                     if (parsed) {
@@ -63811,7 +75846,7 @@ var ts;
                         // that encodes the suffix, but we would have to escape the character "?" which readDirectory
                         // doesn't support. For now, this is safer but slower
                         var includeGlob = normalizedSuffix ? "**/*" : "./*";
-                        var matches = tryReadDirectory(host, baseDirectory, fileExtensions, undefined, [includeGlob]);
+                        var matches = tryReadDirectory(host, baseDirectory, fileExtensions, /*exclude*/ undefined, [includeGlob]);
                         if (matches) {
                             var result = [];
                             // Trim away prefix and suffix
@@ -63822,8 +75857,8 @@ var ts;
                                     continue;
                                 }
                                 var start = completePrefix.length;
-                                var length_6 = normalizedMatch.length - start - normalizedSuffix.length;
-                                result.push(ts.removeFileExtension(normalizedMatch.substr(start, length_6)));
+                                var length_7 = normalizedMatch.length - start - normalizedSuffix.length;
+                                result.push(ts.removeFileExtension(normalizedMatch.substr(start, length_7)));
                             }
                             return result;
                         }
@@ -63831,30 +75866,27 @@ var ts;
                 }
                 return undefined;
             }
-            function enumeratePotentialNonRelativeModules(fragment, scriptPath, options) {
+            function enumeratePotentialNonRelativeModules(fragment, scriptPath, options, typeChecker, host) {
                 // Check If this is a nested module
                 var isNestedModule = fragment.indexOf(ts.directorySeparator) !== -1;
                 var moduleNameFragment = isNestedModule ? fragment.substr(0, fragment.lastIndexOf(ts.directorySeparator)) : undefined;
                 // Get modules that the type checker picked up
                 var ambientModules = ts.map(typeChecker.getAmbientModules(), function (sym) { return ts.stripQuotes(sym.name); });
-                var nonRelativeModules = ts.filter(ambientModules, function (moduleName) { return ts.startsWith(moduleName, fragment); });
+                var nonRelativeModuleNames = ts.filter(ambientModules, function (moduleName) { return ts.startsWith(moduleName, fragment); });
                 // Nested modules of the form "module-name/sub" need to be adjusted to only return the string
                 // after the last '/' that appears in the fragment because that's where the replacement span
                 // starts
                 if (isNestedModule) {
                     var moduleNameWithSeperator_1 = ts.ensureTrailingDirectorySeparator(moduleNameFragment);
-                    nonRelativeModules = ts.map(nonRelativeModules, function (moduleName) {
-                        if (ts.startsWith(fragment, moduleNameWithSeperator_1)) {
-                            return moduleName.substr(moduleNameWithSeperator_1.length);
-                        }
-                        return moduleName;
+                    nonRelativeModuleNames = ts.map(nonRelativeModuleNames, function (nonRelativeModuleName) {
+                        return ts.removePrefix(nonRelativeModuleName, moduleNameWithSeperator_1);
                     });
                 }
                 if (!options.moduleResolution || options.moduleResolution === ts.ModuleResolutionKind.NodeJs) {
                     for (var _i = 0, _a = enumerateNodeModulesVisibleToScript(host, scriptPath); _i < _a.length; _i++) {
                         var visibleModule = _a[_i];
                         if (!isNestedModule) {
-                            nonRelativeModules.push(visibleModule.moduleName);
+                            nonRelativeModuleNames.push(visibleModule.moduleName);
                         }
                         else if (ts.startsWith(visibleModule.moduleName, moduleNameFragment)) {
                             var nestedFiles = tryReadDirectory(host, visibleModule.moduleDir, ts.supportedTypeScriptExtensions, /*exclude*/ undefined, /*include*/ ["./*"]);
@@ -63863,16 +75895,16 @@ var ts;
                                     var f = nestedFiles_1[_b];
                                     f = ts.normalizePath(f);
                                     var nestedModule = ts.removeFileExtension(ts.getBaseFileName(f));
-                                    nonRelativeModules.push(nestedModule);
+                                    nonRelativeModuleNames.push(nestedModule);
                                 }
                             }
                         }
                     }
                 }
-                return ts.deduplicate(nonRelativeModules);
+                return ts.deduplicate(nonRelativeModuleNames);
             }
-            function getTripleSlashReferenceCompletion(sourceFile, position) {
-                var token = ts.getTokenAtPosition(sourceFile, position);
+            function getTripleSlashReferenceCompletion(sourceFile, position, compilerOptions, host) {
+                var token = ts.getTokenAtPosition(sourceFile, position, /*includeJsDocComment*/ false);
                 if (!token) {
                     return undefined;
                 }
@@ -63884,6 +75916,19 @@ var ts;
                 if (!range) {
                     return undefined;
                 }
+                var completionInfo = {
+                    /**
+                     * We don't want the editor to offer any other completions, such as snippets, inside a comment.
+                     */
+                    isGlobalCompletion: false,
+                    isMemberCompletion: false,
+                    /**
+                     * The user may type in a path that doesn't yet exist, creating a "new identifier"
+                     * with respect to the collection of identifiers the server is aware of.
+                     */
+                    isNewIdentifierLocation: true,
+                    entries: []
+                };
                 var text = sourceFile.text.substr(range.pos, position - range.pos);
                 var match = tripleSlashDirectiveFragmentRegex.exec(text);
                 if (match) {
@@ -63891,32 +75936,27 @@ var ts;
                     var kind = match[2];
                     var toComplete = match[3];
                     var scriptPath = ts.getDirectoryPath(sourceFile.path);
-                    var entries_3;
                     if (kind === "path") {
                         // Give completions for a relative path
                         var span_10 = getDirectoryFragmentTextSpan(toComplete, range.pos + prefix.length);
-                        entries_3 = getCompletionEntriesForDirectoryFragment(toComplete, scriptPath, ts.getSupportedExtensions(compilerOptions), /*includeExtensions*/ true, span_10, sourceFile.path);
+                        completionInfo.entries = getCompletionEntriesForDirectoryFragment(toComplete, scriptPath, ts.getSupportedExtensions(compilerOptions), /*includeExtensions*/ true, span_10, host, sourceFile.path);
                     }
                     else {
                         // Give completions based on the typings available
                         var span_11 = { start: range.pos + prefix.length, length: match[0].length - prefix.length };
-                        entries_3 = getCompletionEntriesFromTypings(host, compilerOptions, scriptPath, span_11);
+                        completionInfo.entries = getCompletionEntriesFromTypings(host, compilerOptions, scriptPath, span_11);
                     }
-                    return {
-                        isMemberCompletion: false,
-                        isNewIdentifierLocation: true,
-                        entries: entries_3
-                    };
                 }
-                return undefined;
+                return completionInfo;
             }
+            PathCompletions.getTripleSlashReferenceCompletion = getTripleSlashReferenceCompletion;
             function getCompletionEntriesFromTypings(host, options, scriptPath, span, result) {
                 if (result === void 0) { result = []; }
                 // Check for typings specified in compiler options
                 if (options.types) {
                     for (var _i = 0, _a = options.types; _i < _a.length; _i++) {
                         var moduleName = _a[_i];
-                        result.push(createCompletionEntryForModule(moduleName, ts.ScriptElementKind.externalModuleName, span));
+                        result.push(createCompletionEntryForModule(moduleName, "external module name" /* externalModuleName */, span));
                     }
                 }
                 else if (host.getDirectories) {
@@ -63929,33 +75969,33 @@ var ts;
                     if (typeRoots) {
                         for (var _b = 0, typeRoots_2 = typeRoots; _b < typeRoots_2.length; _b++) {
                             var root = typeRoots_2[_b];
-                            getCompletionEntriesFromDirectories(host, options, root, span, result);
+                            getCompletionEntriesFromDirectories(host, root, span, result);
                         }
                     }
                 }
                 if (host.getDirectories) {
                     // Also get all @types typings installed in visible node_modules directories
-                    for (var _c = 0, _d = findPackageJsons(scriptPath); _c < _d.length; _c++) {
+                    for (var _c = 0, _d = findPackageJsons(scriptPath, host); _c < _d.length; _c++) {
                         var packageJson = _d[_c];
                         var typesDir = ts.combinePaths(ts.getDirectoryPath(packageJson), "node_modules/@types");
-                        getCompletionEntriesFromDirectories(host, options, typesDir, span, result);
+                        getCompletionEntriesFromDirectories(host, typesDir, span, result);
                     }
                 }
                 return result;
             }
-            function getCompletionEntriesFromDirectories(host, options, directory, span, result) {
+            function getCompletionEntriesFromDirectories(host, directory, span, result) {
                 if (host.getDirectories && tryDirectoryExists(host, directory)) {
                     var directories = tryGetDirectories(host, directory);
                     if (directories) {
                         for (var _i = 0, directories_3 = directories; _i < directories_3.length; _i++) {
                             var typeDirectory = directories_3[_i];
                             typeDirectory = ts.normalizePath(typeDirectory);
-                            result.push(createCompletionEntryForModule(ts.getBaseFileName(typeDirectory), ts.ScriptElementKind.externalModuleName, span));
+                            result.push(createCompletionEntryForModule(ts.getBaseFileName(typeDirectory), "external module name" /* externalModuleName */, span));
                         }
                     }
                 }
             }
-            function findPackageJsons(currentDir) {
+            function findPackageJsons(currentDir, host) {
                 var paths = [];
                 var currentConfigPath;
                 while (true) {
@@ -63963,11 +76003,11 @@ var ts;
                     if (currentConfigPath) {
                         paths.push(currentConfigPath);
                         currentDir = ts.getDirectoryPath(currentConfigPath);
-                        var parent_16 = ts.getDirectoryPath(currentDir);
-                        if (currentDir === parent_16) {
+                        var parent_17 = ts.getDirectoryPath(currentDir);
+                        if (currentDir === parent_17) {
                             break;
                         }
-                        currentDir = parent_16;
+                        currentDir = parent_17;
                     }
                     else {
                         break;
@@ -63978,7 +76018,7 @@ var ts;
             function enumerateNodeModulesVisibleToScript(host, scriptPath) {
                 var result = [];
                 if (host.readFile && host.fileExists) {
-                    for (var _i = 0, _a = findPackageJsons(scriptPath); _i < _a.length; _i++) {
+                    for (var _i = 0, _a = findPackageJsons(scriptPath, host); _i < _a.length; _i++) {
                         var packageJson = _a[_i];
                         var contents = tryReadingPackageJson(packageJson);
                         if (!contents) {
@@ -64022,7 +76062,7 @@ var ts;
                 }
             }
             function createCompletionEntryForModule(name, kind, replacementSpan) {
-                return { name: name, kind: kind, kindModifiers: ts.ScriptElementKindModifier.none, sortText: name, replacementSpan: replacementSpan };
+                return { name: name, kind: kind, kindModifiers: "" /* none */, sortText: name, replacementSpan: replacementSpan };
             }
             // Replace everything after the last directory seperator that appears
             function getDirectoryFragmentTextSpan(text, textStart) {
@@ -64042,38 +76082,353 @@ var ts;
             function normalizeAndPreserveTrailingSlash(path) {
                 return ts.hasTrailingDirectorySeparator(path) ? ts.ensureTrailingDirectorySeparator(ts.normalizePath(path)) : ts.normalizePath(path);
             }
+            /**
+             * Matches a triple slash reference directive with an incomplete string literal for its path. Used
+             * to determine if the caret is currently within the string literal and capture the literal fragment
+             * for completions.
+             * For example, this matches
+             *
+             * /// <reference path="fragment
+             *
+             * but not
+             *
+             * /// <reference path="fragment"
+             */
+            var tripleSlashDirectiveFragmentRegex = /^(\/\/\/\s*<reference\s+(path|types)\s*=\s*(?:'|"))([^\3"]*)$/;
+            var nodeModulesDependencyKeys = ["dependencies", "devDependencies", "peerDependencies", "optionalDependencies"];
+            function tryGetDirectories(host, directoryName) {
+                return tryIOAndConsumeErrors(host, host.getDirectories, directoryName);
+            }
+            function tryReadDirectory(host, path, extensions, exclude, include) {
+                return tryIOAndConsumeErrors(host, host.readDirectory, path, extensions, exclude, include);
+            }
+            function tryReadFile(host, path) {
+                return tryIOAndConsumeErrors(host, host.readFile, path);
+            }
+            function tryFileExists(host, path) {
+                return tryIOAndConsumeErrors(host, host.fileExists, path);
+            }
+            function tryDirectoryExists(host, path) {
+                try {
+                    return ts.directoryProbablyExists(path, host);
+                }
+                catch (e) { }
+                return undefined;
+            }
+            function tryIOAndConsumeErrors(host, toApply) {
+                var args = [];
+                for (var _i = 2; _i < arguments.length; _i++) {
+                    args[_i - 2] = arguments[_i];
+                }
+                try {
+                    return toApply && toApply.apply(host, args);
+                }
+                catch (e) { }
+                return undefined;
+            }
+        })(PathCompletions = Completions.PathCompletions || (Completions.PathCompletions = {}));
+    })(Completions = ts.Completions || (ts.Completions = {}));
+})(ts || (ts = {}));
+/// <reference path="./pathCompletions.ts" />
+/* @internal */
+var ts;
+(function (ts) {
+    var Completions;
+    (function (Completions) {
+        var KeywordCompletionFilters;
+        (function (KeywordCompletionFilters) {
+            KeywordCompletionFilters[KeywordCompletionFilters["None"] = 0] = "None";
+            KeywordCompletionFilters[KeywordCompletionFilters["ClassElementKeywords"] = 1] = "ClassElementKeywords";
+            KeywordCompletionFilters[KeywordCompletionFilters["ConstructorParameterKeywords"] = 2] = "ConstructorParameterKeywords";
+        })(KeywordCompletionFilters || (KeywordCompletionFilters = {}));
+        function getCompletionsAtPosition(host, typeChecker, log, compilerOptions, sourceFile, position) {
+            if (ts.isInReferenceComment(sourceFile, position)) {
+                return Completions.PathCompletions.getTripleSlashReferenceCompletion(sourceFile, position, compilerOptions, host);
+            }
+            if (ts.isInString(sourceFile, position)) {
+                return getStringLiteralCompletionEntries(sourceFile, position, typeChecker, compilerOptions, host, log);
+            }
+            var completionData = getCompletionData(typeChecker, log, sourceFile, position);
+            if (!completionData) {
+                return undefined;
+            }
+            var symbols = completionData.symbols, isGlobalCompletion = completionData.isGlobalCompletion, isMemberCompletion = completionData.isMemberCompletion, isNewIdentifierLocation = completionData.isNewIdentifierLocation, location = completionData.location, request = completionData.request, keywordFilters = completionData.keywordFilters;
+            if (sourceFile.languageVariant === 1 /* JSX */ &&
+                location && location.parent && location.parent.kind === 252 /* JsxClosingElement */) {
+                // In the TypeScript JSX element, if such element is not defined. When users query for completion at closing tag,
+                // instead of simply giving unknown value, the completion will return the tag-name of an associated opening-element.
+                // For example:
+                //     var x = <div> </ /*1*/>  completion list at "1" will contain "div" with type any
+                var tagName = location.parent.parent.openingElement.tagName;
+                return { isGlobalCompletion: false, isMemberCompletion: true, isNewIdentifierLocation: false,
+                    entries: [{
+                            name: tagName.getFullText(),
+                            kind: "class" /* classElement */,
+                            kindModifiers: undefined,
+                            sortText: "0",
+                        }] };
+            }
+            if (request) {
+                var entries_2 = request.kind === "JsDocTagName"
+                    ? ts.JsDoc.getJSDocTagNameCompletions()
+                    : request.kind === "JsDocTag"
+                        ? ts.JsDoc.getJSDocTagCompletions()
+                        : ts.JsDoc.getJSDocParameterNameCompletions(request.tag);
+                return { isGlobalCompletion: false, isMemberCompletion: false, isNewIdentifierLocation: false, entries: entries_2 };
+            }
+            var entries = [];
+            if (ts.isSourceFileJavaScript(sourceFile)) {
+                var uniqueNames = getCompletionEntriesFromSymbols(symbols, entries, location, /*performCharacterChecks*/ true, typeChecker, compilerOptions.target, log);
+                ts.addRange(entries, getJavaScriptCompletionEntries(sourceFile, location.pos, uniqueNames, compilerOptions.target));
+            }
+            else {
+                if ((!symbols || symbols.length === 0) && keywordFilters === 0 /* None */) {
+                    return undefined;
+                }
+                getCompletionEntriesFromSymbols(symbols, entries, location, /*performCharacterChecks*/ true, typeChecker, compilerOptions.target, log);
+            }
+            // TODO add filter for keyword based on type/value/namespace and also location
+            // Add all keywords if
+            // - this is not a member completion list (all the keywords)
+            // - other filters are enabled in required scenario so add those keywords
+            if (keywordFilters !== 0 /* None */ || !isMemberCompletion) {
+                ts.addRange(entries, getKeywordCompletions(keywordFilters));
+            }
+            return { isGlobalCompletion: isGlobalCompletion, isMemberCompletion: isMemberCompletion, isNewIdentifierLocation: isNewIdentifierLocation, entries: entries };
         }
         Completions.getCompletionsAtPosition = getCompletionsAtPosition;
+        function getJavaScriptCompletionEntries(sourceFile, position, uniqueNames, target) {
+            var entries = [];
+            var nameTable = ts.getNameTable(sourceFile);
+            nameTable.forEach(function (pos, name) {
+                // Skip identifiers produced only from the current location
+                if (pos === position) {
+                    return;
+                }
+                if (!uniqueNames.get(name)) {
+                    uniqueNames.set(name, name);
+                    var displayName = getCompletionEntryDisplayName(ts.unescapeIdentifier(name), target, /*performCharacterChecks*/ true);
+                    if (displayName) {
+                        var entry = {
+                            name: displayName,
+                            kind: "warning" /* warning */,
+                            kindModifiers: "",
+                            sortText: "1"
+                        };
+                        entries.push(entry);
+                    }
+                }
+            });
+            return entries;
+        }
+        function createCompletionEntry(symbol, location, performCharacterChecks, typeChecker, target) {
+            // Try to get a valid display name for this symbol, if we could not find one, then ignore it.
+            // We would like to only show things that can be added after a dot, so for instance numeric properties can
+            // not be accessed with a dot (a.1 <- invalid)
+            var displayName = getCompletionEntryDisplayNameForSymbol(typeChecker, symbol, target, performCharacterChecks, location);
+            if (!displayName) {
+                return undefined;
+            }
+            // TODO(drosen): Right now we just permit *all* semantic meanings when calling
+            // 'getSymbolKind' which is permissible given that it is backwards compatible; but
+            // really we should consider passing the meaning for the node so that we don't report
+            // that a suggestion for a value is an interface.  We COULD also just do what
+            // 'getSymbolModifiers' does, which is to use the first declaration.
+            // Use a 'sortText' of 0' so that all symbol completion entries come before any other
+            // entries (like JavaScript identifier entries).
+            return {
+                name: displayName,
+                kind: ts.SymbolDisplay.getSymbolKind(typeChecker, symbol, location),
+                kindModifiers: ts.SymbolDisplay.getSymbolModifiers(symbol),
+                sortText: "0",
+            };
+        }
+        function getCompletionEntriesFromSymbols(symbols, entries, location, performCharacterChecks, typeChecker, target, log) {
+            var start = ts.timestamp();
+            var uniqueNames = ts.createMap();
+            if (symbols) {
+                for (var _i = 0, symbols_5 = symbols; _i < symbols_5.length; _i++) {
+                    var symbol = symbols_5[_i];
+                    var entry = createCompletionEntry(symbol, location, performCharacterChecks, typeChecker, target);
+                    if (entry) {
+                        var id = ts.escapeIdentifier(entry.name);
+                        if (!uniqueNames.get(id)) {
+                            entries.push(entry);
+                            uniqueNames.set(id, id);
+                        }
+                    }
+                }
+            }
+            log("getCompletionsAtPosition: getCompletionEntriesFromSymbols: " + (ts.timestamp() - start));
+            return uniqueNames;
+        }
+        function getStringLiteralCompletionEntries(sourceFile, position, typeChecker, compilerOptions, host, log) {
+            var node = ts.findPrecedingToken(position, sourceFile);
+            if (!node || node.kind !== 9 /* StringLiteral */) {
+                return undefined;
+            }
+            if (node.parent.kind === 261 /* PropertyAssignment */ &&
+                node.parent.parent.kind === 178 /* ObjectLiteralExpression */ &&
+                node.parent.name === node) {
+                // Get quoted name of properties of the object literal expression
+                // i.e. interface ConfigFiles {
+                //          'jspm:dev': string
+                //      }
+                //      let files: ConfigFiles = {
+                //          '/*completion position*/'
+                //      }
+                //
+                //      function foo(c: ConfigFiles) {}
+                //      foo({
+                //          '/*completion position*/'
+                //      });
+                return getStringLiteralCompletionEntriesFromPropertyAssignment(node.parent, typeChecker, compilerOptions.target, log);
+            }
+            else if (ts.isElementAccessExpression(node.parent) && node.parent.argumentExpression === node) {
+                // Get all names of properties on the expression
+                // i.e. interface A {
+                //      'prop1': string
+                // }
+                // let a: A;
+                // a['/*completion position*/']
+                return getStringLiteralCompletionEntriesFromElementAccess(node.parent, typeChecker, compilerOptions.target, log);
+            }
+            else if (node.parent.kind === 238 /* ImportDeclaration */ || ts.isExpressionOfExternalModuleImportEqualsDeclaration(node) || ts.isRequireCall(node.parent, /*checkArgumentIsStringLiteral*/ false)) {
+                // Get all known external module names or complete a path to a module
+                // i.e. import * as ns from "/*completion position*/";
+                //      import x = require("/*completion position*/");
+                //      var y = require("/*completion position*/");
+                return Completions.PathCompletions.getStringLiteralCompletionEntriesFromModuleNames(node, compilerOptions, host, typeChecker);
+            }
+            else if (isEqualityExpression(node.parent)) {
+                // Get completions from the type of the other operand
+                // i.e. switch (a) {
+                //         case '/*completion position*/'
+                //      }
+                return getStringLiteralCompletionEntriesFromType(typeChecker.getTypeAtLocation(node.parent.left === node ? node.parent.right : node.parent.left), typeChecker);
+            }
+            else if (ts.isCaseOrDefaultClause(node.parent)) {
+                // Get completions from the type of the switch expression
+                // i.e. x === '/*completion position'
+                return getStringLiteralCompletionEntriesFromType(typeChecker.getTypeAtLocation(node.parent.parent.parent.expression), typeChecker);
+            }
+            else {
+                var argumentInfo = ts.SignatureHelp.getImmediatelyContainingArgumentInfo(node, position, sourceFile);
+                if (argumentInfo) {
+                    // Get string literal completions from specialized signatures of the target
+                    // i.e. declare function f(a: 'A');
+                    // f("/*completion position*/")
+                    return getStringLiteralCompletionEntriesFromCallExpression(argumentInfo, typeChecker);
+                }
+                // Get completion for string literal from string literal type
+                // i.e. var x: "hi" | "hello" = "/*completion position*/"
+                return getStringLiteralCompletionEntriesFromType(typeChecker.getContextualType(node), typeChecker);
+            }
+        }
+        function getStringLiteralCompletionEntriesFromPropertyAssignment(element, typeChecker, target, log) {
+            var type = typeChecker.getContextualType(element.parent);
+            var entries = [];
+            if (type) {
+                getCompletionEntriesFromSymbols(type.getApparentProperties(), entries, element, /*performCharacterChecks*/ false, typeChecker, target, log);
+                if (entries.length) {
+                    return { isGlobalCompletion: false, isMemberCompletion: true, isNewIdentifierLocation: true, entries: entries };
+                }
+            }
+        }
+        function getStringLiteralCompletionEntriesFromCallExpression(argumentInfo, typeChecker) {
+            var candidates = [];
+            var entries = [];
+            var uniques = ts.createMap();
+            typeChecker.getResolvedSignature(argumentInfo.invocation, candidates);
+            for (var _i = 0, candidates_3 = candidates; _i < candidates_3.length; _i++) {
+                var candidate = candidates_3[_i];
+                addStringLiteralCompletionsFromType(typeChecker.getParameterType(candidate, argumentInfo.argumentIndex), entries, typeChecker, uniques);
+            }
+            if (entries.length) {
+                return { isGlobalCompletion: false, isMemberCompletion: false, isNewIdentifierLocation: true, entries: entries };
+            }
+            return undefined;
+        }
+        function getStringLiteralCompletionEntriesFromElementAccess(node, typeChecker, target, log) {
+            var type = typeChecker.getTypeAtLocation(node.expression);
+            var entries = [];
+            if (type) {
+                getCompletionEntriesFromSymbols(type.getApparentProperties(), entries, node, /*performCharacterChecks*/ false, typeChecker, target, log);
+                if (entries.length) {
+                    return { isGlobalCompletion: false, isMemberCompletion: true, isNewIdentifierLocation: true, entries: entries };
+                }
+            }
+            return undefined;
+        }
+        function getStringLiteralCompletionEntriesFromType(type, typeChecker) {
+            if (type) {
+                var entries = [];
+                addStringLiteralCompletionsFromType(type, entries, typeChecker);
+                if (entries.length) {
+                    return { isGlobalCompletion: false, isMemberCompletion: false, isNewIdentifierLocation: false, entries: entries };
+                }
+            }
+            return undefined;
+        }
+        function addStringLiteralCompletionsFromType(type, result, typeChecker, uniques) {
+            if (uniques === void 0) { uniques = ts.createMap(); }
+            if (type && type.flags & 16384 /* TypeParameter */) {
+                type = typeChecker.getBaseConstraintOfType(type);
+            }
+            if (!type) {
+                return;
+            }
+            if (type.flags & 65536 /* Union */) {
+                for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                    var t = _a[_i];
+                    addStringLiteralCompletionsFromType(t, result, typeChecker, uniques);
+                }
+            }
+            else if (type.flags & 32 /* StringLiteral */) {
+                var name_60 = type.value;
+                if (!uniques.has(name_60)) {
+                    uniques.set(name_60, true);
+                    result.push({
+                        name: name_60,
+                        kindModifiers: "" /* none */,
+                        kind: "var" /* variableElement */,
+                        sortText: "0"
+                    });
+                }
+            }
+        }
         function getCompletionEntryDetails(typeChecker, log, compilerOptions, sourceFile, position, entryName) {
             // Compute all the completion symbols again.
             var completionData = getCompletionData(typeChecker, log, sourceFile, position);
             if (completionData) {
-                var symbols = completionData.symbols, location_2 = completionData.location;
+                var symbols = completionData.symbols, location_3 = completionData.location;
                 // Find the symbol with the matching entry name.
                 // We don't need to perform character checks here because we're only comparing the
                 // name against 'entryName' (which is known to be good), not building a new
                 // completion entry.
-                var symbol = ts.forEach(symbols, function (s) { return getCompletionEntryDisplayNameForSymbol(typeChecker, s, compilerOptions.target, /*performCharacterChecks*/ false, location_2) === entryName ? s : undefined; });
+                var symbol = ts.forEach(symbols, function (s) { return getCompletionEntryDisplayNameForSymbol(typeChecker, s, compilerOptions.target, /*performCharacterChecks*/ false, location_3) === entryName ? s : undefined; });
                 if (symbol) {
-                    var _a = ts.SymbolDisplay.getSymbolDisplayPartsDocumentationAndSymbolKind(typeChecker, symbol, sourceFile, location_2, location_2, 7 /* All */), displayParts = _a.displayParts, documentation = _a.documentation, symbolKind = _a.symbolKind;
+                    var _a = ts.SymbolDisplay.getSymbolDisplayPartsDocumentationAndSymbolKind(typeChecker, symbol, sourceFile, location_3, location_3, 7 /* All */), displayParts = _a.displayParts, documentation = _a.documentation, symbolKind = _a.symbolKind, tags = _a.tags;
                     return {
                         name: entryName,
                         kindModifiers: ts.SymbolDisplay.getSymbolModifiers(symbol),
                         kind: symbolKind,
                         displayParts: displayParts,
-                        documentation: documentation
+                        documentation: documentation,
+                        tags: tags
                     };
                 }
             }
             // Didn't find a symbol with this name.  See if we can find a keyword instead.
-            var keywordCompletion = ts.forEach(keywordCompletions, function (c) { return c.name === entryName; });
+            var keywordCompletion = ts.forEach(getKeywordCompletions(0 /* None */), function (c) { return c.name === entryName; });
             if (keywordCompletion) {
                 return {
                     name: entryName,
-                    kind: ts.ScriptElementKind.keyword,
-                    kindModifiers: ts.ScriptElementKindModifier.none,
+                    kind: "keyword" /* keyword */,
+                    kindModifiers: "" /* none */,
                     displayParts: [ts.displayPart(entryName, ts.SymbolDisplayPartKind.keyword)],
-                    documentation: undefined
+                    documentation: undefined,
+                    tags: undefined
                 };
             }
             return undefined;
@@ -64083,56 +76438,84 @@ var ts;
             // Compute all the completion symbols again.
             var completionData = getCompletionData(typeChecker, log, sourceFile, position);
             if (completionData) {
-                var symbols = completionData.symbols, location_3 = completionData.location;
+                var symbols = completionData.symbols, location_4 = completionData.location;
                 // Find the symbol with the matching entry name.
                 // We don't need to perform character checks here because we're only comparing the
                 // name against 'entryName' (which is known to be good), not building a new
                 // completion entry.
-                return ts.forEach(symbols, function (s) { return getCompletionEntryDisplayNameForSymbol(typeChecker, s, compilerOptions.target, /*performCharacterChecks*/ false, location_3) === entryName ? s : undefined; });
+                return ts.forEach(symbols, function (s) { return getCompletionEntryDisplayNameForSymbol(typeChecker, s, compilerOptions.target, /*performCharacterChecks*/ false, location_4) === entryName ? s : undefined; });
             }
             return undefined;
         }
         Completions.getCompletionEntrySymbol = getCompletionEntrySymbol;
         function getCompletionData(typeChecker, log, sourceFile, position) {
             var isJavaScriptFile = ts.isSourceFileJavaScript(sourceFile);
-            var isJsDocTagName = false;
+            var request;
             var start = ts.timestamp();
-            var currentToken = ts.getTokenAtPosition(sourceFile, position);
+            var currentToken = ts.getTokenAtPosition(sourceFile, position, /*includeJsDocComment*/ false); // TODO: GH#15853
+            // We will check for jsdoc comments with insideComment and getJsDocTagAtPosition. (TODO: that seems rather inefficient to check the same thing so many times.)
             log("getCompletionData: Get current token: " + (ts.timestamp() - start));
             start = ts.timestamp();
             // Completion not allowed inside comments, bail out if this is the case
-            var insideComment = ts.isInsideComment(sourceFile, currentToken, position);
+            var insideComment = ts.isInComment(sourceFile, position, currentToken);
             log("getCompletionData: Is inside comment: " + (ts.timestamp() - start));
+            var insideJsDocTagTypeExpression = false;
             if (insideComment) {
-                // The current position is next to the '@' sign, when no tag name being provided yet.
-                // Provide a full list of tag names
-                if (ts.hasDocComment(sourceFile, position) && sourceFile.text.charCodeAt(position - 1) === 64 /* at */) {
-                    isJsDocTagName = true;
+                if (ts.hasDocComment(sourceFile, position)) {
+                    if (sourceFile.text.charCodeAt(position - 1) === 64 /* at */) {
+                        // The current position is next to the '@' sign, when no tag name being provided yet.
+                        // Provide a full list of tag names
+                        request = { kind: "JsDocTagName" };
+                    }
+                    else {
+                        // When completion is requested without "@", we will have check to make sure that
+                        // there are no comments prefix the request position. We will only allow "*" and space.
+                        // e.g
+                        //   /** |c| /*
+                        //
+                        //   /**
+                        //     |c|
+                        //    */
+                        //
+                        //   /**
+                        //    * |c|
+                        //    */
+                        //
+                        //   /**
+                        //    *         |c|
+                        //    */
+                        var lineStart = ts.getLineStartPositionForPosition(position, sourceFile);
+                        if (!(sourceFile.text.substring(lineStart, position).match(/[^\*|\s|(/\*\*)]/))) {
+                            request = { kind: "JsDocTag" };
+                        }
+                    }
                 }
                 // Completion should work inside certain JsDoc tags. For example:
                 //     /** @type {number | string} */
                 // Completion should work in the brackets
-                var insideJsDocTagExpression = false;
-                var tag = ts.getJsDocTagAtPosition(sourceFile, position);
+                var tag = getJsDocTagAtPosition(currentToken, position);
                 if (tag) {
                     if (tag.tagName.pos <= position && position <= tag.tagName.end) {
-                        isJsDocTagName = true;
+                        request = { kind: "JsDocTagName" };
                     }
-                    switch (tag.kind) {
-                        case 277 /* JSDocTypeTag */:
-                        case 275 /* JSDocParameterTag */:
-                        case 276 /* JSDocReturnTag */:
-                            var tagWithExpression = tag;
-                            if (tagWithExpression.typeExpression) {
-                                insideJsDocTagExpression = tagWithExpression.typeExpression.pos < position && position < tagWithExpression.typeExpression.end;
-                            }
-                            break;
+                    if (isTagWithTypeExpression(tag) && tag.typeExpression) {
+                        currentToken = ts.getTokenAtPosition(sourceFile, position, /*includeJsDocComment*/ true);
+                        if (!currentToken ||
+                            (!ts.isDeclarationName(currentToken) &&
+                                (currentToken.parent.kind !== 292 /* JSDocPropertyTag */ ||
+                                    currentToken.parent.name !== currentToken))) {
+                            // Use as type location if inside tag's type expression
+                            insideJsDocTagTypeExpression = isCurrentlyEditingNode(tag.typeExpression);
+                        }
+                    }
+                    if (ts.isJSDocParameterTag(tag) && (ts.nodeIsMissing(tag.name) || tag.name.pos <= position && position <= tag.name.end)) {
+                        request = { kind: "JsDocParameterName", tag: tag };
                     }
                 }
-                if (isJsDocTagName) {
-                    return { symbols: undefined, isMemberCompletion: false, isNewIdentifierLocation: false, location: undefined, isRightOfDot: false, isJsDocTagName: isJsDocTagName };
+                if (request) {
+                    return { symbols: undefined, isGlobalCompletion: false, isMemberCompletion: false, isNewIdentifierLocation: false, location: undefined, isRightOfDot: false, request: request, keywordFilters: 0 /* None */ };
                 }
-                if (!insideJsDocTagExpression) {
+                if (!insideJsDocTagTypeExpression) {
                     // Proceed if the current position is in jsDoc tag expression; otherwise it is a normal
                     // comment or the plain text part of a jsDoc comment, so no completion should be available
                     log("Returning an empty list because completion was inside a regular comment or plain text part of a JsDoc comment.");
@@ -64140,7 +76523,7 @@ var ts;
                 }
             }
             start = ts.timestamp();
-            var previousToken = ts.findPrecedingToken(position, sourceFile);
+            var previousToken = ts.findPrecedingToken(position, sourceFile, /*startNode*/ undefined, insideJsDocTagTypeExpression);
             log("getCompletionData: Get previous token 1: " + (ts.timestamp() - start));
             // The decision to provide completion depends on the contextToken, which is determined through the previousToken.
             // Note: 'previousToken' (and thus 'contextToken') can be undefined if we are the beginning of the file
@@ -64149,7 +76532,7 @@ var ts;
             // Skip this partial identifier and adjust the contextToken to the token that precedes it.
             if (contextToken && position <= contextToken.end && ts.isWord(contextToken.kind)) {
                 var start_2 = ts.timestamp();
-                contextToken = ts.findPrecedingToken(contextToken.getFullStart(), sourceFile);
+                contextToken = ts.findPrecedingToken(contextToken.getFullStart(), sourceFile, /*startNode*/ undefined, insideJsDocTagTypeExpression);
                 log("getCompletionData: Get previous token 2: " + (ts.timestamp() - start_2));
             }
             // Find the node where completion is requested on.
@@ -64159,20 +76542,20 @@ var ts;
             var isRightOfDot = false;
             var isRightOfOpenTag = false;
             var isStartingCloseTag = false;
-            var location = ts.getTouchingPropertyName(sourceFile, position);
+            var location = ts.getTouchingPropertyName(sourceFile, position, insideJsDocTagTypeExpression); // TODO: GH#15853
             if (contextToken) {
                 // Bail out if this is a known invalid completion location
                 if (isCompletionListBlocker(contextToken)) {
                     log("Returning an empty list because completion was requested in an invalid position.");
                     return undefined;
                 }
-                var parent_17 = contextToken.parent, kind = contextToken.kind;
-                if (kind === 21 /* DotToken */) {
-                    if (parent_17.kind === 172 /* PropertyAccessExpression */) {
+                var parent_18 = contextToken.parent;
+                if (contextToken.kind === 23 /* DotToken */) {
+                    if (parent_18.kind === 179 /* PropertyAccessExpression */) {
                         node = contextToken.parent.expression;
                         isRightOfDot = true;
                     }
-                    else if (parent_17.kind === 139 /* QualifiedName */) {
+                    else if (parent_18.kind === 143 /* QualifiedName */) {
                         node = contextToken.parent.left;
                         isRightOfDot = true;
                     }
@@ -64183,19 +76566,42 @@ var ts;
                     }
                 }
                 else if (sourceFile.languageVariant === 1 /* JSX */) {
-                    if (kind === 25 /* LessThanToken */) {
-                        isRightOfOpenTag = true;
-                        location = contextToken;
-                    }
-                    else if (kind === 39 /* SlashToken */ && contextToken.parent.kind === 245 /* JsxClosingElement */) {
-                        isStartingCloseTag = true;
-                        location = contextToken;
+                    // <UI.Test /* completion position */ />
+                    // If the tagname is a property access expression, we will then walk up to the top most of property access expression.
+                    // Then, try to get a JSX container and its associated attributes type.
+                    if (parent_18 && parent_18.kind === 179 /* PropertyAccessExpression */) {
+                        contextToken = parent_18;
+                        parent_18 = parent_18.parent;
+                    }
+                    switch (parent_18.kind) {
+                        case 252 /* JsxClosingElement */:
+                            if (contextToken.kind === 41 /* SlashToken */) {
+                                isStartingCloseTag = true;
+                                location = contextToken;
+                            }
+                            break;
+                        case 194 /* BinaryExpression */:
+                            if (!(parent_18.left.flags & 32768 /* ThisNodeHasError */)) {
+                                // It has a left-hand side, so we're not in an opening JSX tag.
+                                break;
+                            }
+                        // falls through
+                        case 250 /* JsxSelfClosingElement */:
+                        case 249 /* JsxElement */:
+                        case 251 /* JsxOpeningElement */:
+                            if (contextToken.kind === 27 /* LessThanToken */) {
+                                isRightOfOpenTag = true;
+                                location = contextToken;
+                            }
+                            break;
                     }
                 }
             }
             var semanticStart = ts.timestamp();
+            var isGlobalCompletion = false;
             var isMemberCompletion;
             var isNewIdentifierLocation;
+            var keywordFilters = 0 /* None */;
             var symbols = [];
             if (isRightOfDot) {
                 getTypeScriptMemberSymbols();
@@ -64229,12 +76635,27 @@ var ts;
                 }
             }
             log("getCompletionData: Semantic work: " + (ts.timestamp() - semanticStart));
-            return { symbols: symbols, isMemberCompletion: isMemberCompletion, isNewIdentifierLocation: isNewIdentifierLocation, location: location, isRightOfDot: (isRightOfDot || isRightOfOpenTag), isJsDocTagName: isJsDocTagName };
+            return { symbols: symbols, isGlobalCompletion: isGlobalCompletion, isMemberCompletion: isMemberCompletion, isNewIdentifierLocation: isNewIdentifierLocation, location: location, isRightOfDot: (isRightOfDot || isRightOfOpenTag), request: request, keywordFilters: keywordFilters };
+            function isTagWithTypeExpression(tag) {
+                switch (tag.kind) {
+                    case 285 /* JSDocAugmentsTag */:
+                    case 287 /* JSDocParameterTag */:
+                    case 292 /* JSDocPropertyTag */:
+                    case 288 /* JSDocReturnTag */:
+                    case 289 /* JSDocTypeTag */:
+                    case 291 /* JSDocTypedefTag */:
+                        return true;
+                }
+            }
             function getTypeScriptMemberSymbols() {
                 // Right of dot member completion list
+                isGlobalCompletion = false;
                 isMemberCompletion = true;
                 isNewIdentifierLocation = false;
-                if (node.kind === 69 /* Identifier */ || node.kind === 139 /* QualifiedName */ || node.kind === 172 /* PropertyAccessExpression */) {
+                // Since this is qualified name check its a type node location
+                var isTypeLocation = ts.isPartOfTypeNode(node.parent) || insideJsDocTagTypeExpression;
+                var isRhsOfImportDeclaration = ts.isInRightSideOfInternalImportEqualsDeclaration(node);
+                if (node.kind === 71 /* Identifier */ || node.kind === 143 /* QualifiedName */ || node.kind === 179 /* PropertyAccessExpression */) {
                     var symbol = typeChecker.getSymbolAtLocation(node);
                     // This is an alias, follow what it aliases
                     if (symbol && symbol.flags & 8388608 /* Alias */) {
@@ -64243,15 +76664,23 @@ var ts;
                     if (symbol && symbol.flags & 1952 /* HasExports */) {
                         // Extract module or enum members
                         var exportedSymbols = typeChecker.getExportsOfModule(symbol);
+                        var isValidValueAccess_1 = function (symbol) { return typeChecker.isValidPropertyAccess((node.parent), symbol.name); };
+                        var isValidTypeAccess_1 = function (symbol) { return symbolCanbeReferencedAtTypeLocation(symbol); };
+                        var isValidAccess_1 = isRhsOfImportDeclaration ?
+                            // Any kind is allowed when dotting off namespace in internal import equals declaration
+                            function (symbol) { return isValidTypeAccess_1(symbol) || isValidValueAccess_1(symbol); } :
+                            isTypeLocation ? isValidTypeAccess_1 : isValidValueAccess_1;
                         ts.forEach(exportedSymbols, function (symbol) {
-                            if (typeChecker.isValidPropertyAccess((node.parent), symbol.name)) {
+                            if (isValidAccess_1(symbol)) {
                                 symbols.push(symbol);
                             }
                         });
                     }
                 }
-                var type = typeChecker.getTypeAtLocation(node);
-                addTypeProperties(type);
+                if (!isTypeLocation) {
+                    var type = typeChecker.getTypeAtLocation(node);
+                    addTypeProperties(type);
+                }
             }
             function addTypeProperties(type) {
                 if (type) {
@@ -64262,7 +76691,7 @@ var ts;
                             symbols.push(symbol);
                         }
                     }
-                    if (isJavaScriptFile && type.flags & 524288 /* Union */) {
+                    if (isJavaScriptFile && type.flags & 65536 /* Union */) {
                         // In javascript files, for union types, we don't just get the members that
                         // the individual types have in common, we also include all the members that
                         // each individual type has.  This is because we're going to add all identifiers
@@ -64279,6 +76708,7 @@ var ts;
             function tryGetGlobalSymbols() {
                 var objectLikeContainer;
                 var namedImportsOrExports;
+                var classLikeContainer;
                 var jsxContainer;
                 if (objectLikeContainer = tryGetObjectLikeCompletionContainer(contextToken)) {
                     return tryGetObjectLikeCompletionSymbols(objectLikeContainer);
@@ -64288,13 +76718,27 @@ var ts;
                     // try to show exported member for imported module
                     return tryGetImportOrExportClauseCompletionSymbols(namedImportsOrExports);
                 }
+                if (tryGetConstructorLikeCompletionContainer(contextToken)) {
+                    // no members, only keywords
+                    isMemberCompletion = false;
+                    // Declaring new property/method/accessor
+                    isNewIdentifierLocation = true;
+                    // Has keywords for constructor parameter
+                    keywordFilters = 2 /* ConstructorParameterKeywords */;
+                    return true;
+                }
+                if (classLikeContainer = tryGetClassLikeCompletionContainer(contextToken)) {
+                    // cursor inside class declaration
+                    getGetClassLikeCompletionSymbols(classLikeContainer);
+                    return true;
+                }
                 if (jsxContainer = tryGetContainingJsxElement(contextToken)) {
                     var attrsType = void 0;
-                    if ((jsxContainer.kind === 242 /* JsxSelfClosingElement */) || (jsxContainer.kind === 243 /* JsxOpeningElement */)) {
+                    if ((jsxContainer.kind === 250 /* JsxSelfClosingElement */) || (jsxContainer.kind === 251 /* JsxOpeningElement */)) {
                         // Cursor is inside a JSX self-closing element or opening element
-                        attrsType = typeChecker.getJsxElementAttributesType(jsxContainer);
+                        attrsType = typeChecker.getAllAttributesTypeFromJsxOpeningLikeElement(jsxContainer);
                         if (attrsType) {
-                            symbols = filterJsxAttributes(typeChecker.getPropertiesOfType(attrsType), jsxContainer.attributes);
+                            symbols = filterJsxAttributes(typeChecker.getPropertiesOfType(attrsType), jsxContainer.attributes.properties);
                             isMemberCompletion = true;
                             isNewIdentifierLocation = false;
                             return true;
@@ -64336,11 +76780,80 @@ var ts;
                     previousToken.getStart() :
                     position;
                 var scopeNode = getScopeNode(contextToken, adjustedPosition, sourceFile) || sourceFile;
-                /// TODO filter meaning based on the current context
+                if (scopeNode) {
+                    isGlobalCompletion =
+                        scopeNode.kind === 265 /* SourceFile */ ||
+                            scopeNode.kind === 196 /* TemplateExpression */ ||
+                            scopeNode.kind === 256 /* JsxExpression */ ||
+                            ts.isStatement(scopeNode);
+                }
                 var symbolMeanings = 793064 /* Type */ | 107455 /* Value */ | 1920 /* Namespace */ | 8388608 /* Alias */;
-                symbols = typeChecker.getSymbolsInScope(scopeNode, symbolMeanings);
+                symbols = filterGlobalCompletion(typeChecker.getSymbolsInScope(scopeNode, symbolMeanings));
                 return true;
             }
+            function filterGlobalCompletion(symbols) {
+                return ts.filter(symbols, function (symbol) {
+                    if (!ts.isSourceFile(location)) {
+                        // export = /**/ here we want to get all meanings, so any symbol is ok
+                        if (ts.isExportAssignment(location.parent)) {
+                            return true;
+                        }
+                        // This is an alias, follow what it aliases
+                        if (symbol && symbol.flags & 8388608 /* Alias */) {
+                            symbol = typeChecker.getAliasedSymbol(symbol);
+                        }
+                        // import m = /**/ <-- It can only access namespace (if typing import = x. this would get member symbols and not namespace)
+                        if (ts.isInRightSideOfInternalImportEqualsDeclaration(location)) {
+                            return !!(symbol.flags & 1920 /* Namespace */);
+                        }
+                        if (insideJsDocTagTypeExpression ||
+                            (!isContextTokenValueLocation(contextToken) &&
+                                (ts.isPartOfTypeNode(location) || isContextTokenTypeLocation(contextToken)))) {
+                            // Its a type, but you can reach it by namespace.type as well
+                            return symbolCanbeReferencedAtTypeLocation(symbol);
+                        }
+                    }
+                    // expressions are value space (which includes the value namespaces)
+                    return !!(symbol.flags & 107455 /* Value */);
+                });
+            }
+            function isContextTokenValueLocation(contextToken) {
+                return contextToken &&
+                    contextToken.kind === 103 /* TypeOfKeyword */ &&
+                    contextToken.parent.kind === 162 /* TypeQuery */;
+            }
+            function isContextTokenTypeLocation(contextToken) {
+                if (contextToken) {
+                    var parentKind = contextToken.parent.kind;
+                    switch (contextToken.kind) {
+                        case 56 /* ColonToken */:
+                            return parentKind === 149 /* PropertyDeclaration */ ||
+                                parentKind === 148 /* PropertySignature */ ||
+                                parentKind === 146 /* Parameter */ ||
+                                parentKind === 226 /* VariableDeclaration */ ||
+                                ts.isFunctionLikeKind(parentKind);
+                        case 58 /* EqualsToken */:
+                            return parentKind === 231 /* TypeAliasDeclaration */;
+                        case 118 /* AsKeyword */:
+                            return parentKind === 202 /* AsExpression */;
+                    }
+                }
+            }
+            function symbolCanbeReferencedAtTypeLocation(symbol) {
+                // This is an alias, follow what it aliases
+                if (symbol && symbol.flags & 8388608 /* Alias */) {
+                    symbol = typeChecker.getAliasedSymbol(symbol);
+                }
+                if (symbol.flags & 793064 /* Type */) {
+                    return true;
+                }
+                if (symbol.flags & (512 /* ValueModule */ | 1024 /* NamespaceModule */)) {
+                    var exportedSymbols = typeChecker.getExportsOfModule(symbol);
+                    // If the exported symbols contains type,
+                    // symbol can be referenced at locations where type is allowed
+                    return ts.forEach(exportedSymbols, symbolCanbeReferencedAtTypeLocation);
+                }
+            }
             /**
              * Finds the first node that "embraces" the position, so that one may
              * accurately aggregate locals from the closest containing scope.
@@ -64362,15 +76875,15 @@ var ts;
                 return result;
             }
             function isInJsxText(contextToken) {
-                if (contextToken.kind === 244 /* JsxText */) {
+                if (contextToken.kind === 10 /* JsxText */) {
                     return true;
                 }
-                if (contextToken.kind === 27 /* GreaterThanToken */ && contextToken.parent) {
-                    if (contextToken.parent.kind === 243 /* JsxOpeningElement */) {
+                if (contextToken.kind === 29 /* GreaterThanToken */ && contextToken.parent) {
+                    if (contextToken.parent.kind === 251 /* JsxOpeningElement */) {
                         return true;
                     }
-                    if (contextToken.parent.kind === 245 /* JsxClosingElement */ || contextToken.parent.kind === 242 /* JsxSelfClosingElement */) {
-                        return contextToken.parent.parent && contextToken.parent.parent.kind === 241 /* JsxElement */;
+                    if (contextToken.parent.kind === 252 /* JsxClosingElement */ || contextToken.parent.kind === 250 /* JsxSelfClosingElement */) {
+                        return contextToken.parent.parent && contextToken.parent.parent.kind === 249 /* JsxElement */;
                     }
                 }
                 return false;
@@ -64379,41 +76892,41 @@ var ts;
                 if (previousToken) {
                     var containingNodeKind = previousToken.parent.kind;
                     switch (previousToken.kind) {
-                        case 24 /* CommaToken */:
-                            return containingNodeKind === 174 /* CallExpression */ // func( a, |
-                                || containingNodeKind === 148 /* Constructor */ // constructor( a, |   /* public, protected, private keywords are allowed here, so show completion */
-                                || containingNodeKind === 175 /* NewExpression */ // new C(a, |
-                                || containingNodeKind === 170 /* ArrayLiteralExpression */ // [a, |
-                                || containingNodeKind === 187 /* BinaryExpression */ // const x = (a, |
-                                || containingNodeKind === 156 /* FunctionType */; // var x: (s: string, list|
-                        case 17 /* OpenParenToken */:
-                            return containingNodeKind === 174 /* CallExpression */ // func( |
-                                || containingNodeKind === 148 /* Constructor */ // constructor( |
-                                || containingNodeKind === 175 /* NewExpression */ // new C(a|
-                                || containingNodeKind === 178 /* ParenthesizedExpression */ // const x = (a|
-                                || containingNodeKind === 164 /* ParenthesizedType */; // function F(pred: (a| /* this can become an arrow function, where 'a' is the argument */
-                        case 19 /* OpenBracketToken */:
-                            return containingNodeKind === 170 /* ArrayLiteralExpression */ // [ |
-                                || containingNodeKind === 153 /* IndexSignature */ // [ | : string ]
-                                || containingNodeKind === 140 /* ComputedPropertyName */; // [ |    /* this can become an index signature */
-                        case 125 /* ModuleKeyword */: // module |
-                        case 126 /* NamespaceKeyword */:
+                        case 26 /* CommaToken */:
+                            return containingNodeKind === 181 /* CallExpression */ // func( a, |
+                                || containingNodeKind === 152 /* Constructor */ // constructor( a, |   /* public, protected, private keywords are allowed here, so show completion */
+                                || containingNodeKind === 182 /* NewExpression */ // new C(a, |
+                                || containingNodeKind === 177 /* ArrayLiteralExpression */ // [a, |
+                                || containingNodeKind === 194 /* BinaryExpression */ // const x = (a, |
+                                || containingNodeKind === 160 /* FunctionType */; // var x: (s: string, list|
+                        case 19 /* OpenParenToken */:
+                            return containingNodeKind === 181 /* CallExpression */ // func( |
+                                || containingNodeKind === 152 /* Constructor */ // constructor( |
+                                || containingNodeKind === 182 /* NewExpression */ // new C(a|
+                                || containingNodeKind === 185 /* ParenthesizedExpression */ // const x = (a|
+                                || containingNodeKind === 168 /* ParenthesizedType */; // function F(pred: (a| /* this can become an arrow function, where 'a' is the argument */
+                        case 21 /* OpenBracketToken */:
+                            return containingNodeKind === 177 /* ArrayLiteralExpression */ // [ |
+                                || containingNodeKind === 157 /* IndexSignature */ // [ | : string ]
+                                || containingNodeKind === 144 /* ComputedPropertyName */; // [ |    /* this can become an index signature */
+                        case 128 /* ModuleKeyword */: // module |
+                        case 129 /* NamespaceKeyword */:
                             return true;
-                        case 21 /* DotToken */:
-                            return containingNodeKind === 225 /* ModuleDeclaration */; // module A.|
-                        case 15 /* OpenBraceToken */:
-                            return containingNodeKind === 221 /* ClassDeclaration */; // class A{ |
-                        case 56 /* EqualsToken */:
-                            return containingNodeKind === 218 /* VariableDeclaration */ // const x = a|
-                                || containingNodeKind === 187 /* BinaryExpression */; // x = a|
-                        case 12 /* TemplateHead */:
-                            return containingNodeKind === 189 /* TemplateExpression */; // `aa ${|
-                        case 13 /* TemplateMiddle */:
-                            return containingNodeKind === 197 /* TemplateSpan */; // `aa ${10} dd ${|
-                        case 112 /* PublicKeyword */:
-                        case 110 /* PrivateKeyword */:
-                        case 111 /* ProtectedKeyword */:
-                            return containingNodeKind === 145 /* PropertyDeclaration */; // class A{ public |
+                        case 23 /* DotToken */:
+                            return containingNodeKind === 233 /* ModuleDeclaration */; // module A.|
+                        case 17 /* OpenBraceToken */:
+                            return containingNodeKind === 229 /* ClassDeclaration */; // class A{ |
+                        case 58 /* EqualsToken */:
+                            return containingNodeKind === 226 /* VariableDeclaration */ // const x = a|
+                                || containingNodeKind === 194 /* BinaryExpression */; // x = a|
+                        case 14 /* TemplateHead */:
+                            return containingNodeKind === 196 /* TemplateExpression */; // `aa ${|
+                        case 15 /* TemplateMiddle */:
+                            return containingNodeKind === 205 /* TemplateSpan */; // `aa ${10} dd ${|
+                        case 114 /* PublicKeyword */:
+                        case 112 /* PrivateKeyword */:
+                        case 113 /* ProtectedKeyword */:
+                            return containingNodeKind === 149 /* PropertyDeclaration */; // class A{ public |
                     }
                     // Previous token may have been a keyword that was converted to an identifier.
                     switch (previousToken.getText()) {
@@ -64427,7 +76940,7 @@ var ts;
             }
             function isInStringOrRegularExpressionOrTemplateLiteral(contextToken) {
                 if (contextToken.kind === 9 /* StringLiteral */
-                    || contextToken.kind === 10 /* RegularExpressionLiteral */
+                    || contextToken.kind === 12 /* RegularExpressionLiteral */
                     || ts.isTemplateLiteralKind(contextToken.kind)) {
                     var start_3 = contextToken.getStart();
                     var end = contextToken.getEnd();
@@ -64440,7 +76953,7 @@ var ts;
                     }
                     if (position === end) {
                         return !!contextToken.isUnterminated
-                            || contextToken.kind === 10 /* RegularExpressionLiteral */;
+                            || contextToken.kind === 12 /* RegularExpressionLiteral */;
                     }
                 }
                 return false;
@@ -64454,53 +76967,48 @@ var ts;
             function tryGetObjectLikeCompletionSymbols(objectLikeContainer) {
                 // We're looking up possible property names from contextual/inferred/declared type.
                 isMemberCompletion = true;
-                var typeForObject;
+                var typeMembers;
                 var existingMembers;
-                if (objectLikeContainer.kind === 171 /* ObjectLiteralExpression */) {
+                if (objectLikeContainer.kind === 178 /* ObjectLiteralExpression */) {
                     // We are completing on contextual types, but may also include properties
                     // other than those within the declared type.
                     isNewIdentifierLocation = true;
-                    // If the object literal is being assigned to something of type 'null | { hello: string }',
-                    // it clearly isn't trying to satisfy the 'null' type. So we grab the non-nullable type if possible.
-                    typeForObject = typeChecker.getContextualType(objectLikeContainer);
-                    typeForObject = typeForObject && typeForObject.getNonNullableType();
+                    var typeForObject = typeChecker.getContextualType(objectLikeContainer);
+                    if (!typeForObject)
+                        return false;
+                    typeMembers = typeChecker.getAllPossiblePropertiesOfType(typeForObject);
                     existingMembers = objectLikeContainer.properties;
                 }
-                else if (objectLikeContainer.kind === 167 /* ObjectBindingPattern */) {
+                else {
+                    ts.Debug.assert(objectLikeContainer.kind === 174 /* ObjectBindingPattern */);
                     // We are *only* completing on properties from the type being destructured.
                     isNewIdentifierLocation = false;
                     var rootDeclaration = ts.getRootDeclaration(objectLikeContainer.parent);
-                    if (ts.isVariableLike(rootDeclaration)) {
-                        // We don't want to complete using the type acquired by the shape
-                        // of the binding pattern; we are only interested in types acquired
-                        // through type declaration or inference.
-                        // Also proceed if rootDeclaration is a parameter and if its containing function expression/arrow function is contextually typed -
-                        // type of parameter will flow in from the contextual type of the function
-                        var canGetType = !!(rootDeclaration.initializer || rootDeclaration.type);
-                        if (!canGetType && rootDeclaration.kind === 142 /* Parameter */) {
-                            if (ts.isExpression(rootDeclaration.parent)) {
-                                canGetType = !!typeChecker.getContextualType(rootDeclaration.parent);
-                            }
-                            else if (rootDeclaration.parent.kind === 147 /* MethodDeclaration */ || rootDeclaration.parent.kind === 150 /* SetAccessor */) {
-                                canGetType = ts.isExpression(rootDeclaration.parent.parent) && !!typeChecker.getContextualType(rootDeclaration.parent.parent);
-                            }
-                        }
-                        if (canGetType) {
-                            typeForObject = typeChecker.getTypeAtLocation(objectLikeContainer);
-                            existingMembers = objectLikeContainer.elements;
-                        }
-                    }
-                    else {
-                        ts.Debug.fail("Root declaration is not variable-like.");
+                    if (!ts.isVariableLike(rootDeclaration))
+                        throw ts.Debug.fail("Root declaration is not variable-like.");
+                    // We don't want to complete using the type acquired by the shape
+                    // of the binding pattern; we are only interested in types acquired
+                    // through type declaration or inference.
+                    // Also proceed if rootDeclaration is a parameter and if its containing function expression/arrow function is contextually typed -
+                    // type of parameter will flow in from the contextual type of the function
+                    var canGetType = rootDeclaration.initializer || rootDeclaration.type || rootDeclaration.parent.parent.kind === 216 /* ForOfStatement */;
+                    if (!canGetType && rootDeclaration.kind === 146 /* Parameter */) {
+                        if (ts.isExpression(rootDeclaration.parent)) {
+                            canGetType = !!typeChecker.getContextualType(rootDeclaration.parent);
+                        }
+                        else if (rootDeclaration.parent.kind === 151 /* MethodDeclaration */ || rootDeclaration.parent.kind === 154 /* SetAccessor */) {
+                            canGetType = ts.isExpression(rootDeclaration.parent.parent) && !!typeChecker.getContextualType(rootDeclaration.parent.parent);
+                        }
+                    }
+                    if (canGetType) {
+                        var typeForObject = typeChecker.getTypeAtLocation(objectLikeContainer);
+                        if (!typeForObject)
+                            return false;
+                        // In a binding pattern, get only known properties. Everywhere else we will get all possible properties.
+                        typeMembers = typeChecker.getPropertiesOfType(typeForObject);
+                        existingMembers = objectLikeContainer.elements;
                     }
                 }
-                else {
-                    ts.Debug.fail("Expected object literal or binding pattern, got " + objectLikeContainer.kind);
-                }
-                if (!typeForObject) {
-                    return false;
-                }
-                var typeMembers = typeChecker.getPropertiesOfType(typeForObject);
                 if (typeMembers && typeMembers.length > 0) {
                     // Add filtered items to the completion list
                     symbols = filterObjectMembersList(typeMembers, existingMembers);
@@ -64523,9 +77031,9 @@ var ts;
              * @returns true if 'symbols' was successfully populated; false otherwise.
              */
             function tryGetImportOrExportClauseCompletionSymbols(namedImportsOrExports) {
-                var declarationKind = namedImportsOrExports.kind === 233 /* NamedImports */ ?
-                    230 /* ImportDeclaration */ :
-                    236 /* ExportDeclaration */;
+                var declarationKind = namedImportsOrExports.kind === 241 /* NamedImports */ ?
+                    238 /* ImportDeclaration */ :
+                    244 /* ExportDeclaration */;
                 var importOrExportDeclaration = ts.getAncestor(namedImportsOrExports, declarationKind);
                 var moduleSpecifier = importOrExportDeclaration.moduleSpecifier;
                 if (!moduleSpecifier) {
@@ -64533,14 +77041,62 @@ var ts;
                 }
                 isMemberCompletion = true;
                 isNewIdentifierLocation = false;
-                var exports;
-                var moduleSpecifierSymbol = typeChecker.getSymbolAtLocation(importOrExportDeclaration.moduleSpecifier);
-                if (moduleSpecifierSymbol) {
-                    exports = typeChecker.getExportsOfModule(moduleSpecifierSymbol);
+                var moduleSpecifierSymbol = typeChecker.getSymbolAtLocation(moduleSpecifier);
+                if (!moduleSpecifierSymbol) {
+                    symbols = ts.emptyArray;
+                    return true;
                 }
-                symbols = exports ? filterNamedImportOrExportCompletionItems(exports, namedImportsOrExports.elements) : ts.emptyArray;
+                var exports = typeChecker.getExportsAndPropertiesOfModule(moduleSpecifierSymbol);
+                symbols = filterNamedImportOrExportCompletionItems(exports, namedImportsOrExports.elements);
                 return true;
             }
+            /**
+             * Aggregates relevant symbols for completion in class declaration
+             * Relevant symbols are stored in the captured 'symbols' variable.
+             */
+            function getGetClassLikeCompletionSymbols(classLikeDeclaration) {
+                // We're looking up possible property names from parent type.
+                isMemberCompletion = true;
+                // Declaring new property/method/accessor
+                isNewIdentifierLocation = true;
+                // Has keywords for class elements
+                keywordFilters = 1 /* ClassElementKeywords */;
+                var baseTypeNode = ts.getClassExtendsHeritageClauseElement(classLikeDeclaration);
+                var implementsTypeNodes = ts.getClassImplementsHeritageClauseElements(classLikeDeclaration);
+                if (baseTypeNode || implementsTypeNodes) {
+                    var classElement = contextToken.parent;
+                    var classElementModifierFlags = ts.isClassElement(classElement) && ts.getModifierFlags(classElement);
+                    // If this is context token is not something we are editing now, consider if this would lead to be modifier
+                    if (contextToken.kind === 71 /* Identifier */ && !isCurrentlyEditingNode(contextToken)) {
+                        switch (contextToken.getText()) {
+                            case "private":
+                                classElementModifierFlags = classElementModifierFlags | 8 /* Private */;
+                                break;
+                            case "static":
+                                classElementModifierFlags = classElementModifierFlags | 32 /* Static */;
+                                break;
+                        }
+                    }
+                    // No member list for private methods
+                    if (!(classElementModifierFlags & 8 /* Private */)) {
+                        var baseClassTypeToGetPropertiesFrom = void 0;
+                        if (baseTypeNode) {
+                            baseClassTypeToGetPropertiesFrom = typeChecker.getTypeAtLocation(baseTypeNode);
+                            if (classElementModifierFlags & 32 /* Static */) {
+                                // Use static class to get property symbols from
+                                baseClassTypeToGetPropertiesFrom = typeChecker.getTypeOfSymbolAtLocation(baseClassTypeToGetPropertiesFrom.symbol, classLikeDeclaration);
+                            }
+                        }
+                        var implementedInterfaceTypePropertySymbols = (classElementModifierFlags & 32 /* Static */) ?
+                            undefined :
+                            ts.flatMap(implementsTypeNodes, function (typeNode) { return typeChecker.getPropertiesOfType(typeChecker.getTypeAtLocation(typeNode)); });
+                        // List of property symbols of base type that are not private and already implemented
+                        symbols = filterClassMembersList(baseClassTypeToGetPropertiesFrom ?
+                            typeChecker.getPropertiesOfType(baseClassTypeToGetPropertiesFrom) :
+                            undefined, implementedInterfaceTypePropertySymbols, classLikeDeclaration.members, classElementModifierFlags);
+                    }
+                }
+            }
             /**
              * Returns the immediate owning object literal or binding pattern of a context token,
              * on the condition that one exists and that the context implies completion should be given.
@@ -64548,11 +77104,11 @@ var ts;
             function tryGetObjectLikeCompletionContainer(contextToken) {
                 if (contextToken) {
                     switch (contextToken.kind) {
-                        case 15 /* OpenBraceToken */: // const x = { |
-                        case 24 /* CommaToken */:
-                            var parent_18 = contextToken.parent;
-                            if (parent_18 && (parent_18.kind === 171 /* ObjectLiteralExpression */ || parent_18.kind === 167 /* ObjectBindingPattern */)) {
-                                return parent_18;
+                        case 17 /* OpenBraceToken */: // const x = { |
+                        case 26 /* CommaToken */:
+                            var parent_19 = contextToken.parent;
+                            if (ts.isObjectLiteralExpression(parent_19) || ts.isObjectBindingPattern(parent_19)) {
+                                return parent_19;
                             }
                             break;
                     }
@@ -64566,141 +77122,236 @@ var ts;
             function tryGetNamedImportsOrExportsForCompletion(contextToken) {
                 if (contextToken) {
                     switch (contextToken.kind) {
-                        case 15 /* OpenBraceToken */: // import { |
-                        case 24 /* CommaToken */:
+                        case 17 /* OpenBraceToken */: // import { |
+                        case 26 /* CommaToken */:
                             switch (contextToken.parent.kind) {
-                                case 233 /* NamedImports */:
-                                case 237 /* NamedExports */:
+                                case 241 /* NamedImports */:
+                                case 245 /* NamedExports */:
                                     return contextToken.parent;
                             }
                     }
                 }
                 return undefined;
             }
+            function isFromClassElementDeclaration(node) {
+                return ts.isClassElement(node.parent) && ts.isClassLike(node.parent.parent);
+            }
+            function isParameterOfConstructorDeclaration(node) {
+                return ts.isParameter(node) && ts.isConstructorDeclaration(node.parent);
+            }
+            function isConstructorParameterCompletion(node) {
+                return node.parent &&
+                    isParameterOfConstructorDeclaration(node.parent) &&
+                    (isConstructorParameterCompletionKeyword(node.kind) || ts.isDeclarationName(node));
+            }
+            /**
+             * Returns the immediate owning class declaration of a context token,
+             * on the condition that one exists and that the context implies completion should be given.
+             */
+            function tryGetClassLikeCompletionContainer(contextToken) {
+                if (contextToken) {
+                    switch (contextToken.kind) {
+                        case 17 /* OpenBraceToken */:
+                            if (ts.isClassLike(contextToken.parent)) {
+                                return contextToken.parent;
+                            }
+                            break;
+                        // class c {getValue(): number, | }
+                        case 26 /* CommaToken */:
+                            if (ts.isClassLike(contextToken.parent)) {
+                                return contextToken.parent;
+                            }
+                            break;
+                        // class c {getValue(): number; | }
+                        case 25 /* SemicolonToken */:
+                        // class c { method() { } | }
+                        case 18 /* CloseBraceToken */:
+                            if (ts.isClassLike(location)) {
+                                return location;
+                            }
+                            break;
+                        default:
+                            if (isFromClassElementDeclaration(contextToken) &&
+                                (isClassMemberCompletionKeyword(contextToken.kind) ||
+                                    isClassMemberCompletionKeywordText(contextToken.getText()))) {
+                                return contextToken.parent.parent;
+                            }
+                    }
+                }
+                // class c { method() { } | method2() { } }
+                if (location && location.kind === 295 /* SyntaxList */ && ts.isClassLike(location.parent)) {
+                    return location.parent;
+                }
+                return undefined;
+            }
+            /**
+             * Returns the immediate owning class declaration of a context token,
+             * on the condition that one exists and that the context implies completion should be given.
+             */
+            function tryGetConstructorLikeCompletionContainer(contextToken) {
+                if (contextToken) {
+                    switch (contextToken.kind) {
+                        case 19 /* OpenParenToken */:
+                        case 26 /* CommaToken */:
+                            return ts.isConstructorDeclaration(contextToken.parent) && contextToken.parent;
+                        default:
+                            if (isConstructorParameterCompletion(contextToken)) {
+                                return contextToken.parent.parent;
+                            }
+                    }
+                }
+                return undefined;
+            }
             function tryGetContainingJsxElement(contextToken) {
                 if (contextToken) {
-                    var parent_19 = contextToken.parent;
+                    var parent_20 = contextToken.parent;
                     switch (contextToken.kind) {
-                        case 26 /* LessThanSlashToken */:
-                        case 39 /* SlashToken */:
-                        case 69 /* Identifier */:
-                        case 246 /* JsxAttribute */:
-                        case 247 /* JsxSpreadAttribute */:
-                            if (parent_19 && (parent_19.kind === 242 /* JsxSelfClosingElement */ || parent_19.kind === 243 /* JsxOpeningElement */)) {
-                                return parent_19;
+                        case 28 /* LessThanSlashToken */:
+                        case 41 /* SlashToken */:
+                        case 71 /* Identifier */:
+                        case 179 /* PropertyAccessExpression */:
+                        case 254 /* JsxAttributes */:
+                        case 253 /* JsxAttribute */:
+                        case 255 /* JsxSpreadAttribute */:
+                            if (parent_20 && (parent_20.kind === 250 /* JsxSelfClosingElement */ || parent_20.kind === 251 /* JsxOpeningElement */)) {
+                                return parent_20;
                             }
-                            else if (parent_19.kind === 246 /* JsxAttribute */) {
-                                return parent_19.parent;
+                            else if (parent_20.kind === 253 /* JsxAttribute */) {
+                                // Currently we parse JsxOpeningLikeElement as:
+                                //      JsxOpeningLikeElement
+                                //          attributes: JsxAttributes
+                                //             properties: NodeArray<JsxAttributeLike>
+                                return parent_20.parent.parent;
                             }
                             break;
                         // The context token is the closing } or " of an attribute, which means
                         // its parent is a JsxExpression, whose parent is a JsxAttribute,
                         // whose parent is a JsxOpeningLikeElement
                         case 9 /* StringLiteral */:
-                            if (parent_19 && ((parent_19.kind === 246 /* JsxAttribute */) || (parent_19.kind === 247 /* JsxSpreadAttribute */))) {
-                                return parent_19.parent;
+                            if (parent_20 && ((parent_20.kind === 253 /* JsxAttribute */) || (parent_20.kind === 255 /* JsxSpreadAttribute */))) {
+                                // Currently we parse JsxOpeningLikeElement as:
+                                //      JsxOpeningLikeElement
+                                //          attributes: JsxAttributes
+                                //             properties: NodeArray<JsxAttributeLike>
+                                return parent_20.parent.parent;
                             }
                             break;
-                        case 16 /* CloseBraceToken */:
-                            if (parent_19 &&
-                                parent_19.kind === 248 /* JsxExpression */ &&
-                                parent_19.parent &&
-                                (parent_19.parent.kind === 246 /* JsxAttribute */)) {
-                                return parent_19.parent.parent;
+                        case 18 /* CloseBraceToken */:
+                            if (parent_20 &&
+                                parent_20.kind === 256 /* JsxExpression */ &&
+                                parent_20.parent && parent_20.parent.kind === 253 /* JsxAttribute */) {
+                                // Currently we parse JsxOpeningLikeElement as:
+                                //      JsxOpeningLikeElement
+                                //          attributes: JsxAttributes
+                                //             properties: NodeArray<JsxAttributeLike>
+                                //                  each JsxAttribute can have initializer as JsxExpression
+                                return parent_20.parent.parent.parent;
                             }
-                            if (parent_19 && parent_19.kind === 247 /* JsxSpreadAttribute */) {
-                                return parent_19.parent;
+                            if (parent_20 && parent_20.kind === 255 /* JsxSpreadAttribute */) {
+                                // Currently we parse JsxOpeningLikeElement as:
+                                //      JsxOpeningLikeElement
+                                //          attributes: JsxAttributes
+                                //             properties: NodeArray<JsxAttributeLike>
+                                return parent_20.parent.parent;
                             }
                             break;
                     }
                 }
                 return undefined;
             }
-            function isFunction(kind) {
-                switch (kind) {
-                    case 179 /* FunctionExpression */:
-                    case 180 /* ArrowFunction */:
-                    case 220 /* FunctionDeclaration */:
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                    case 151 /* CallSignature */:
-                    case 152 /* ConstructSignature */:
-                    case 153 /* IndexSignature */:
-                        return true;
-                }
-                return false;
-            }
             /**
              * @returns true if we are certain that the currently edited location must define a new location; false otherwise.
              */
             function isSolelyIdentifierDefinitionLocation(contextToken) {
                 var containingNodeKind = contextToken.parent.kind;
                 switch (contextToken.kind) {
-                    case 24 /* CommaToken */:
-                        return containingNodeKind === 218 /* VariableDeclaration */ ||
-                            containingNodeKind === 219 /* VariableDeclarationList */ ||
-                            containingNodeKind === 200 /* VariableStatement */ ||
-                            containingNodeKind === 224 /* EnumDeclaration */ ||
-                            isFunction(containingNodeKind) ||
-                            containingNodeKind === 221 /* ClassDeclaration */ ||
-                            containingNodeKind === 192 /* ClassExpression */ ||
-                            containingNodeKind === 222 /* InterfaceDeclaration */ ||
-                            containingNodeKind === 168 /* ArrayBindingPattern */ ||
-                            containingNodeKind === 223 /* TypeAliasDeclaration */; // type Map, K, |
-                    case 21 /* DotToken */:
-                        return containingNodeKind === 168 /* ArrayBindingPattern */; // var [.|
-                    case 54 /* ColonToken */:
-                        return containingNodeKind === 169 /* BindingElement */; // var {x :html|
-                    case 19 /* OpenBracketToken */:
-                        return containingNodeKind === 168 /* ArrayBindingPattern */; // var [x|
-                    case 17 /* OpenParenToken */:
-                        return containingNodeKind === 252 /* CatchClause */ ||
-                            isFunction(containingNodeKind);
-                    case 15 /* OpenBraceToken */:
-                        return containingNodeKind === 224 /* EnumDeclaration */ ||
-                            containingNodeKind === 222 /* InterfaceDeclaration */ ||
-                            containingNodeKind === 159 /* TypeLiteral */; // const x : { |
-                    case 23 /* SemicolonToken */:
-                        return containingNodeKind === 144 /* PropertySignature */ &&
+                    case 26 /* CommaToken */:
+                        return containingNodeKind === 226 /* VariableDeclaration */ ||
+                            containingNodeKind === 227 /* VariableDeclarationList */ ||
+                            containingNodeKind === 208 /* VariableStatement */ ||
+                            containingNodeKind === 232 /* EnumDeclaration */ ||
+                            isFunctionLikeButNotConstructor(containingNodeKind) ||
+                            containingNodeKind === 230 /* InterfaceDeclaration */ ||
+                            containingNodeKind === 175 /* ArrayBindingPattern */ ||
+                            containingNodeKind === 231 /* TypeAliasDeclaration */ ||
+                            // class A<T, |
+                            // var C = class D<T, |
+                            (ts.isClassLike(contextToken.parent) &&
+                                contextToken.parent.typeParameters &&
+                                contextToken.parent.typeParameters.end >= contextToken.pos);
+                    case 23 /* DotToken */:
+                        return containingNodeKind === 175 /* ArrayBindingPattern */; // var [.|
+                    case 56 /* ColonToken */:
+                        return containingNodeKind === 176 /* BindingElement */; // var {x :html|
+                    case 21 /* OpenBracketToken */:
+                        return containingNodeKind === 175 /* ArrayBindingPattern */; // var [x|
+                    case 19 /* OpenParenToken */:
+                        return containingNodeKind === 260 /* CatchClause */ ||
+                            isFunctionLikeButNotConstructor(containingNodeKind);
+                    case 17 /* OpenBraceToken */:
+                        return containingNodeKind === 232 /* EnumDeclaration */ ||
+                            containingNodeKind === 230 /* InterfaceDeclaration */ ||
+                            containingNodeKind === 163 /* TypeLiteral */; // const x : { |
+                    case 25 /* SemicolonToken */:
+                        return containingNodeKind === 148 /* PropertySignature */ &&
                             contextToken.parent && contextToken.parent.parent &&
-                            (contextToken.parent.parent.kind === 222 /* InterfaceDeclaration */ ||
-                                contextToken.parent.parent.kind === 159 /* TypeLiteral */); // const x : { a; |
-                    case 25 /* LessThanToken */:
-                        return containingNodeKind === 221 /* ClassDeclaration */ ||
-                            containingNodeKind === 192 /* ClassExpression */ ||
-                            containingNodeKind === 222 /* InterfaceDeclaration */ ||
-                            containingNodeKind === 223 /* TypeAliasDeclaration */ ||
-                            isFunction(containingNodeKind);
-                    case 113 /* StaticKeyword */:
-                        return containingNodeKind === 145 /* PropertyDeclaration */;
-                    case 22 /* DotDotDotToken */:
-                        return containingNodeKind === 142 /* Parameter */ ||
+                            (contextToken.parent.parent.kind === 230 /* InterfaceDeclaration */ ||
+                                contextToken.parent.parent.kind === 163 /* TypeLiteral */); // const x : { a; |
+                    case 27 /* LessThanToken */:
+                        return containingNodeKind === 229 /* ClassDeclaration */ ||
+                            containingNodeKind === 199 /* ClassExpression */ ||
+                            containingNodeKind === 230 /* InterfaceDeclaration */ ||
+                            containingNodeKind === 231 /* TypeAliasDeclaration */ ||
+                            ts.isFunctionLikeKind(containingNodeKind);
+                    case 115 /* StaticKeyword */:
+                        return containingNodeKind === 149 /* PropertyDeclaration */ && !ts.isClassLike(contextToken.parent.parent);
+                    case 24 /* DotDotDotToken */:
+                        return containingNodeKind === 146 /* Parameter */ ||
                             (contextToken.parent && contextToken.parent.parent &&
-                                contextToken.parent.parent.kind === 168 /* ArrayBindingPattern */); // var [...z|
-                    case 112 /* PublicKeyword */:
-                    case 110 /* PrivateKeyword */:
-                    case 111 /* ProtectedKeyword */:
-                        return containingNodeKind === 142 /* Parameter */;
-                    case 116 /* AsKeyword */:
-                        return containingNodeKind === 234 /* ImportSpecifier */ ||
-                            containingNodeKind === 238 /* ExportSpecifier */ ||
-                            containingNodeKind === 232 /* NamespaceImport */;
-                    case 73 /* ClassKeyword */:
-                    case 81 /* EnumKeyword */:
-                    case 107 /* InterfaceKeyword */:
-                    case 87 /* FunctionKeyword */:
-                    case 102 /* VarKeyword */:
-                    case 123 /* GetKeyword */:
-                    case 131 /* SetKeyword */:
-                    case 89 /* ImportKeyword */:
-                    case 108 /* LetKeyword */:
-                    case 74 /* ConstKeyword */:
-                    case 114 /* YieldKeyword */:
-                    case 134 /* TypeKeyword */:
+                                contextToken.parent.parent.kind === 175 /* ArrayBindingPattern */); // var [...z|
+                    case 114 /* PublicKeyword */:
+                    case 112 /* PrivateKeyword */:
+                    case 113 /* ProtectedKeyword */:
+                        return containingNodeKind === 146 /* Parameter */ && !ts.isConstructorDeclaration(contextToken.parent.parent);
+                    case 118 /* AsKeyword */:
+                        return containingNodeKind === 242 /* ImportSpecifier */ ||
+                            containingNodeKind === 246 /* ExportSpecifier */ ||
+                            containingNodeKind === 240 /* NamespaceImport */;
+                    case 125 /* GetKeyword */:
+                    case 135 /* SetKeyword */:
+                        if (isFromClassElementDeclaration(contextToken)) {
+                            return false;
+                        }
+                    // falls through
+                    case 75 /* ClassKeyword */:
+                    case 83 /* EnumKeyword */:
+                    case 109 /* InterfaceKeyword */:
+                    case 89 /* FunctionKeyword */:
+                    case 104 /* VarKeyword */:
+                    case 91 /* ImportKeyword */:
+                    case 110 /* LetKeyword */:
+                    case 76 /* ConstKeyword */:
+                    case 116 /* YieldKeyword */:
+                    case 138 /* TypeKeyword */:
                         return true;
                 }
+                // If the previous token is keyword correspoding to class member completion keyword
+                // there will be completion available here
+                if (isClassMemberCompletionKeywordText(contextToken.getText()) &&
+                    isFromClassElementDeclaration(contextToken)) {
+                    return false;
+                }
+                if (isConstructorParameterCompletion(contextToken)) {
+                    // constructor parameter completion is available only if
+                    // - its modifier of the constructor parameter or
+                    // - its name of the parameter and not being edited
+                    // eg. constructor(a |<- this shouldnt show completion
+                    if (!ts.isIdentifier(contextToken) ||
+                        isConstructorParameterCompletionKeywordText(contextToken.getText()) ||
+                        isCurrentlyEditingNode(contextToken)) {
+                        return false;
+                    }
+                }
                 // Previous token may have been a keyword that was converted to an identifier.
                 switch (contextToken.getText()) {
                     case "abstract":
@@ -64720,7 +77371,10 @@ var ts;
                     case "yield":
                         return true;
                 }
-                return false;
+                return ts.isDeclarationName(contextToken) && !ts.isJsxAttribute(contextToken.parent);
+            }
+            function isFunctionLikeButNotConstructor(kind) {
+                return ts.isFunctionLikeKind(kind) && kind !== 152 /* Constructor */;
             }
             function isDotOfNumericLiteral(contextToken) {
                 if (contextToken.kind === 8 /* NumericLiteral */) {
@@ -64743,16 +77397,16 @@ var ts;
                 for (var _i = 0, namedImportsOrExports_1 = namedImportsOrExports; _i < namedImportsOrExports_1.length; _i++) {
                     var element = namedImportsOrExports_1[_i];
                     // If this is the current item we are editing right now, do not filter it out
-                    if (element.getStart() <= position && position <= element.getEnd()) {
+                    if (isCurrentlyEditingNode(element)) {
                         continue;
                     }
-                    var name_50 = element.propertyName || element.name;
-                    existingImportsOrExports[name_50.text] = true;
+                    var name_61 = element.propertyName || element.name;
+                    existingImportsOrExports.set(name_61.text, true);
                 }
-                if (!ts.someProperties(existingImportsOrExports)) {
+                if (existingImportsOrExports.size === 0) {
                     return ts.filter(exportsOfModule, function (e) { return e.name !== "default"; });
                 }
-                return ts.filter(exportsOfModule, function (e) { return e.name !== "default" && !existingImportsOrExports[e.name]; });
+                return ts.filter(exportsOfModule, function (e) { return e.name !== "default" && !existingImportsOrExports.get(e.name); });
             }
             /**
              * Filters out completion suggestions for named imports or exports.
@@ -64768,20 +77422,22 @@ var ts;
                 for (var _i = 0, existingMembers_1 = existingMembers; _i < existingMembers_1.length; _i++) {
                     var m = existingMembers_1[_i];
                     // Ignore omitted expressions for missing members
-                    if (m.kind !== 253 /* PropertyAssignment */ &&
-                        m.kind !== 254 /* ShorthandPropertyAssignment */ &&
-                        m.kind !== 169 /* BindingElement */ &&
-                        m.kind !== 147 /* MethodDeclaration */) {
+                    if (m.kind !== 261 /* PropertyAssignment */ &&
+                        m.kind !== 262 /* ShorthandPropertyAssignment */ &&
+                        m.kind !== 176 /* BindingElement */ &&
+                        m.kind !== 151 /* MethodDeclaration */ &&
+                        m.kind !== 153 /* GetAccessor */ &&
+                        m.kind !== 154 /* SetAccessor */) {
                         continue;
                     }
                     // If this is the current item we are editing right now, do not filter it out
-                    if (m.getStart() <= position && position <= m.getEnd()) {
+                    if (isCurrentlyEditingNode(m)) {
                         continue;
                     }
                     var existingName = void 0;
-                    if (m.kind === 169 /* BindingElement */ && m.propertyName) {
+                    if (m.kind === 176 /* BindingElement */ && m.propertyName) {
                         // include only identifiers in completion list
-                        if (m.propertyName.kind === 69 /* Identifier */) {
+                        if (m.propertyName.kind === 71 /* Identifier */) {
                             existingName = m.propertyName.text;
                         }
                     }
@@ -64789,11 +77445,54 @@ var ts;
                         // TODO(jfreeman): Account for computed property name
                         // NOTE: if one only performs this step when m.name is an identifier,
                         // things like '__proto__' are not filtered out.
-                        existingName = m.name.text;
+                        existingName = ts.getNameOfDeclaration(m).text;
+                    }
+                    existingMemberNames.set(existingName, true);
+                }
+                return ts.filter(contextualMemberSymbols, function (m) { return !existingMemberNames.get(m.name); });
+            }
+            /**
+             * Filters out completion suggestions for class elements.
+             *
+             * @returns Symbols to be suggested in an class element depending on existing memebers and symbol flags
+             */
+            function filterClassMembersList(baseSymbols, implementingTypeSymbols, existingMembers, currentClassElementModifierFlags) {
+                var existingMemberNames = ts.createMap();
+                for (var _i = 0, existingMembers_2 = existingMembers; _i < existingMembers_2.length; _i++) {
+                    var m = existingMembers_2[_i];
+                    // Ignore omitted expressions for missing members
+                    if (m.kind !== 149 /* PropertyDeclaration */ &&
+                        m.kind !== 151 /* MethodDeclaration */ &&
+                        m.kind !== 153 /* GetAccessor */ &&
+                        m.kind !== 154 /* SetAccessor */) {
+                        continue;
+                    }
+                    // If this is the current item we are editing right now, do not filter it out
+                    if (isCurrentlyEditingNode(m)) {
+                        continue;
+                    }
+                    // Dont filter member even if the name matches if it is declared private in the list
+                    if (ts.hasModifier(m, 8 /* Private */)) {
+                        continue;
+                    }
+                    // do not filter it out if the static presence doesnt match
+                    var mIsStatic = ts.hasModifier(m, 32 /* Static */);
+                    var currentElementIsStatic = !!(currentClassElementModifierFlags & 32 /* Static */);
+                    if ((mIsStatic && !currentElementIsStatic) ||
+                        (!mIsStatic && currentElementIsStatic)) {
+                        continue;
+                    }
+                    var existingName = ts.getPropertyNameForPropertyNameNode(m.name);
+                    if (existingName) {
+                        existingMemberNames.set(existingName, true);
                     }
-                    existingMemberNames[existingName] = true;
                 }
-                return ts.filter(contextualMemberSymbols, function (m) { return !existingMemberNames[m.name]; });
+                return ts.concatenate(ts.filter(baseSymbols, function (baseProperty) { return isValidProperty(baseProperty, 8 /* Private */); }), ts.filter(implementingTypeSymbols, function (implementingProperty) { return isValidProperty(implementingProperty, 24 /* NonPublicAccessibilityModifier */); }));
+                function isValidProperty(propertySymbol, inValidModifierFlags) {
+                    return !existingMemberNames.get(propertySymbol.name) &&
+                        propertySymbol.getDeclarations() &&
+                        !(ts.getDeclarationModifierFlagsFromSymbol(propertySymbol) & inValidModifierFlags);
+                }
             }
             /**
              * Filters out completion suggestions from 'symbols' according to existing JSX attributes.
@@ -64806,14 +77505,17 @@ var ts;
                 for (var _i = 0, attributes_1 = attributes; _i < attributes_1.length; _i++) {
                     var attr = attributes_1[_i];
                     // If this is the current item we are editing right now, do not filter it out
-                    if (attr.getStart() <= position && position <= attr.getEnd()) {
+                    if (isCurrentlyEditingNode(attr)) {
                         continue;
                     }
-                    if (attr.kind === 246 /* JsxAttribute */) {
-                        seenNames[attr.name.text] = true;
+                    if (attr.kind === 253 /* JsxAttribute */) {
+                        seenNames.set(attr.name.text, true);
                     }
                 }
-                return ts.filter(symbols, function (a) { return !seenNames[a.name]; });
+                return ts.filter(symbols, function (a) { return !seenNames.get(a.name); });
+            }
+            function isCurrentlyEditingNode(node) {
+                return node.getStart() <= position && position <= node.getEnd();
             }
         }
         /**
@@ -64858,52 +77560,107 @@ var ts;
             return name;
         }
         // A cache of completion entries for keywords, these do not change between sessions
-        var keywordCompletions = [];
-        for (var i = 70 /* FirstKeyword */; i <= 138 /* LastKeyword */; i++) {
-            keywordCompletions.push({
-                name: ts.tokenToString(i),
-                kind: ts.ScriptElementKind.keyword,
-                kindModifiers: ts.ScriptElementKindModifier.none,
-                sortText: "0"
-            });
+        var _keywordCompletions = [];
+        function getKeywordCompletions(keywordFilter) {
+            var completions = _keywordCompletions[keywordFilter];
+            if (completions) {
+                return completions;
+            }
+            return _keywordCompletions[keywordFilter] = generateKeywordCompletions(keywordFilter);
+            function generateKeywordCompletions(keywordFilter) {
+                switch (keywordFilter) {
+                    case 0 /* None */:
+                        return getAllKeywordCompletions();
+                    case 1 /* ClassElementKeywords */:
+                        return getFilteredKeywordCompletions(isClassMemberCompletionKeywordText);
+                    case 2 /* ConstructorParameterKeywords */:
+                        return getFilteredKeywordCompletions(isConstructorParameterCompletionKeywordText);
+                }
+            }
+            function getAllKeywordCompletions() {
+                var allKeywordsCompletions = [];
+                for (var i = 72 /* FirstKeyword */; i <= 142 /* LastKeyword */; i++) {
+                    allKeywordsCompletions.push({
+                        name: ts.tokenToString(i),
+                        kind: "keyword" /* keyword */,
+                        kindModifiers: "" /* none */,
+                        sortText: "0"
+                    });
+                }
+                return allKeywordsCompletions;
+            }
+            function getFilteredKeywordCompletions(filterFn) {
+                return ts.filter(getKeywordCompletions(0 /* None */), function (entry) { return filterFn(entry.name); });
+            }
         }
-        /**
-         * Matches a triple slash reference directive with an incomplete string literal for its path. Used
-         * to determine if the caret is currently within the string literal and capture the literal fragment
-         * for completions.
-         * For example, this matches /// <reference path="fragment
-         */
-        var tripleSlashDirectiveFragmentRegex = /^(\/\/\/\s*<reference\s+(path|types)\s*=\s*(?:'|"))([^\3]*)$/;
-        var nodeModulesDependencyKeys = ["dependencies", "devDependencies", "peerDependencies", "optionalDependencies"];
-        function tryGetDirectories(host, directoryName) {
-            return tryIOAndConsumeErrors(host, host.getDirectories, directoryName);
+        function isClassMemberCompletionKeyword(kind) {
+            switch (kind) {
+                case 114 /* PublicKeyword */:
+                case 113 /* ProtectedKeyword */:
+                case 112 /* PrivateKeyword */:
+                case 117 /* AbstractKeyword */:
+                case 115 /* StaticKeyword */:
+                case 123 /* ConstructorKeyword */:
+                case 131 /* ReadonlyKeyword */:
+                case 125 /* GetKeyword */:
+                case 135 /* SetKeyword */:
+                case 120 /* AsyncKeyword */:
+                    return true;
+            }
+        }
+        function isClassMemberCompletionKeywordText(text) {
+            return isClassMemberCompletionKeyword(ts.stringToToken(text));
+        }
+        function isConstructorParameterCompletionKeyword(kind) {
+            switch (kind) {
+                case 114 /* PublicKeyword */:
+                case 112 /* PrivateKeyword */:
+                case 113 /* ProtectedKeyword */:
+                case 131 /* ReadonlyKeyword */:
+                    return true;
+            }
         }
-        function tryReadDirectory(host, path, extensions, exclude, include) {
-            return tryIOAndConsumeErrors(host, host.readDirectory, path, extensions, exclude, include);
+        function isConstructorParameterCompletionKeywordText(text) {
+            return isConstructorParameterCompletionKeyword(ts.stringToToken(text));
         }
-        function tryReadFile(host, path) {
-            return tryIOAndConsumeErrors(host, host.readFile, path);
+        function isEqualityExpression(node) {
+            return ts.isBinaryExpression(node) && isEqualityOperatorKind(node.operatorToken.kind);
         }
-        function tryFileExists(host, path) {
-            return tryIOAndConsumeErrors(host, host.fileExists, path);
+        function isEqualityOperatorKind(kind) {
+            return kind === 32 /* EqualsEqualsToken */ ||
+                kind === 33 /* ExclamationEqualsToken */ ||
+                kind === 34 /* EqualsEqualsEqualsToken */ ||
+                kind === 35 /* ExclamationEqualsEqualsToken */;
         }
-        function tryDirectoryExists(host, path) {
-            try {
-                return ts.directoryProbablyExists(path, host);
+        /** Get the corresponding JSDocTag node if the position is in a jsDoc comment */
+        function getJsDocTagAtPosition(node, position) {
+            var jsDoc = getJsDocHavingNode(node).jsDoc;
+            if (!jsDoc)
+                return undefined;
+            for (var _i = 0, jsDoc_1 = jsDoc; _i < jsDoc_1.length; _i++) {
+                var _a = jsDoc_1[_i], pos = _a.pos, end = _a.end, tags = _a.tags;
+                if (!tags || position < pos || position > end)
+                    continue;
+                for (var i = tags.length - 1; i >= 0; i--) {
+                    var tag = tags[i];
+                    if (position >= tag.pos) {
+                        return tag;
+                    }
+                }
             }
-            catch (e) { }
-            return undefined;
         }
-        function tryIOAndConsumeErrors(host, toApply) {
-            var args = [];
-            for (var _i = 2; _i < arguments.length; _i++) {
-                args[_i - 2] = arguments[_i];
-            }
-            try {
-                return toApply && toApply.apply(host, args);
+        function getJsDocHavingNode(node) {
+            if (!ts.isToken(node))
+                return node;
+            switch (node.kind) {
+                case 104 /* VarKeyword */:
+                case 110 /* LetKeyword */:
+                case 76 /* ConstKeyword */:
+                    // if the current token is var, let or const, skip the VariableDeclarationList
+                    return node.parent.parent;
+                default:
+                    return node.parent;
             }
-            catch (e) { }
-            return undefined;
         }
     })(Completions = ts.Completions || (ts.Completions = {}));
 })(ts || (ts = {}));
@@ -64912,692 +77669,1517 @@ var ts;
 (function (ts) {
     var DocumentHighlights;
     (function (DocumentHighlights) {
-        function getDocumentHighlights(typeChecker, cancellationToken, sourceFile, position, sourceFilesToSearch) {
-            var node = ts.getTouchingWord(sourceFile, position);
+        function getDocumentHighlights(program, cancellationToken, sourceFile, position, sourceFilesToSearch) {
+            var node = ts.getTouchingWord(sourceFile, position, /*includeJsDocComment*/ true);
+            if (!node)
+                return undefined;
+            if (ts.isJsxOpeningElement(node.parent) && node.parent.tagName === node || ts.isJsxClosingElement(node.parent)) {
+                // For a JSX element, just highlight the matching tag, not all references.
+                var _a = node.parent.parent, openingElement = _a.openingElement, closingElement = _a.closingElement;
+                var highlightSpans = [openingElement, closingElement].map(function (_a) {
+                    var tagName = _a.tagName;
+                    return getHighlightSpanForNode(tagName, sourceFile);
+                });
+                return [{ fileName: sourceFile.fileName, highlightSpans: highlightSpans }];
+            }
+            return getSemanticDocumentHighlights(node, program, cancellationToken, sourceFilesToSearch) || getSyntacticDocumentHighlights(node, sourceFile);
+        }
+        DocumentHighlights.getDocumentHighlights = getDocumentHighlights;
+        function getHighlightSpanForNode(node, sourceFile) {
+            return {
+                fileName: sourceFile.fileName,
+                textSpan: ts.createTextSpanFromNode(node, sourceFile),
+                kind: "none" /* none */
+            };
+        }
+        function getSemanticDocumentHighlights(node, program, cancellationToken, sourceFilesToSearch) {
+            var referenceEntries = ts.FindAllReferences.getReferenceEntriesForNode(node, program, sourceFilesToSearch, cancellationToken);
+            return referenceEntries && convertReferencedSymbols(referenceEntries);
+        }
+        function convertReferencedSymbols(referenceEntries) {
+            var fileNameToDocumentHighlights = ts.createMap();
+            for (var _i = 0, referenceEntries_1 = referenceEntries; _i < referenceEntries_1.length; _i++) {
+                var entry = referenceEntries_1[_i];
+                var _a = ts.FindAllReferences.toHighlightSpan(entry), fileName = _a.fileName, span_12 = _a.span;
+                var highlightSpans = fileNameToDocumentHighlights.get(fileName);
+                if (!highlightSpans) {
+                    fileNameToDocumentHighlights.set(fileName, highlightSpans = []);
+                }
+                highlightSpans.push(span_12);
+            }
+            return ts.arrayFrom(fileNameToDocumentHighlights.entries(), function (_a) {
+                var fileName = _a[0], highlightSpans = _a[1];
+                return ({ fileName: fileName, highlightSpans: highlightSpans });
+            });
+        }
+        function getSyntacticDocumentHighlights(node, sourceFile) {
+            var highlightSpans = getHighlightSpans(node, sourceFile);
+            if (!highlightSpans || highlightSpans.length === 0) {
+                return undefined;
+            }
+            return [{ fileName: sourceFile.fileName, highlightSpans: highlightSpans }];
+        }
+        // returns true if 'node' is defined and has a matching 'kind'.
+        function hasKind(node, kind) {
+            return node !== undefined && node.kind === kind;
+        }
+        // Null-propagating 'parent' function.
+        function parent(node) {
+            return node && node.parent;
+        }
+        function getHighlightSpans(node, sourceFile) {
             if (!node) {
                 return undefined;
             }
-            return getSemanticDocumentHighlights(node) || getSyntacticDocumentHighlights(node);
-            function getHighlightSpanForNode(node) {
-                var start = node.getStart();
-                var end = node.getEnd();
-                return {
-                    fileName: sourceFile.fileName,
-                    textSpan: ts.createTextSpanFromBounds(start, end),
-                    kind: ts.HighlightSpanKind.none
-                };
+            switch (node.kind) {
+                case 90 /* IfKeyword */:
+                case 82 /* ElseKeyword */:
+                    if (hasKind(node.parent, 211 /* IfStatement */)) {
+                        return getIfElseOccurrences(node.parent, sourceFile);
+                    }
+                    break;
+                case 96 /* ReturnKeyword */:
+                    if (hasKind(node.parent, 219 /* ReturnStatement */)) {
+                        return highlightSpans(getReturnOccurrences(node.parent));
+                    }
+                    break;
+                case 100 /* ThrowKeyword */:
+                    if (hasKind(node.parent, 223 /* ThrowStatement */)) {
+                        return highlightSpans(getThrowOccurrences(node.parent));
+                    }
+                    break;
+                case 102 /* TryKeyword */:
+                case 74 /* CatchKeyword */:
+                case 87 /* FinallyKeyword */:
+                    var tryStatement = node.kind === 74 /* CatchKeyword */ ? parent(parent(node)) : parent(node);
+                    if (hasKind(tryStatement, 224 /* TryStatement */)) {
+                        return highlightSpans(getTryCatchFinallyOccurrences(tryStatement, sourceFile));
+                    }
+                    break;
+                case 98 /* SwitchKeyword */:
+                    if (hasKind(node.parent, 221 /* SwitchStatement */)) {
+                        return highlightSpans(getSwitchCaseDefaultOccurrences(node.parent));
+                    }
+                    break;
+                case 73 /* CaseKeyword */:
+                case 79 /* DefaultKeyword */:
+                    if (hasKind(parent(parent(parent(node))), 221 /* SwitchStatement */)) {
+                        return highlightSpans(getSwitchCaseDefaultOccurrences(node.parent.parent.parent));
+                    }
+                    break;
+                case 72 /* BreakKeyword */:
+                case 77 /* ContinueKeyword */:
+                    if (hasKind(node.parent, 218 /* BreakStatement */) || hasKind(node.parent, 217 /* ContinueStatement */)) {
+                        return highlightSpans(getBreakOrContinueStatementOccurrences(node.parent));
+                    }
+                    break;
+                case 88 /* ForKeyword */:
+                    if (hasKind(node.parent, 214 /* ForStatement */) ||
+                        hasKind(node.parent, 215 /* ForInStatement */) ||
+                        hasKind(node.parent, 216 /* ForOfStatement */)) {
+                        return highlightSpans(getLoopBreakContinueOccurrences(node.parent));
+                    }
+                    break;
+                case 106 /* WhileKeyword */:
+                case 81 /* DoKeyword */:
+                    if (hasKind(node.parent, 213 /* WhileStatement */) || hasKind(node.parent, 212 /* DoStatement */)) {
+                        return highlightSpans(getLoopBreakContinueOccurrences(node.parent));
+                    }
+                    break;
+                case 123 /* ConstructorKeyword */:
+                    if (hasKind(node.parent, 152 /* Constructor */)) {
+                        return highlightSpans(getConstructorOccurrences(node.parent));
+                    }
+                    break;
+                case 125 /* GetKeyword */:
+                case 135 /* SetKeyword */:
+                    if (hasKind(node.parent, 153 /* GetAccessor */) || hasKind(node.parent, 154 /* SetAccessor */)) {
+                        return highlightSpans(getGetAndSetOccurrences(node.parent));
+                    }
+                    break;
+                default:
+                    if (ts.isModifierKind(node.kind) && node.parent &&
+                        (ts.isDeclaration(node.parent) || node.parent.kind === 208 /* VariableStatement */)) {
+                        return highlightSpans(getModifierOccurrences(node.kind, node.parent));
+                    }
             }
-            function getSemanticDocumentHighlights(node) {
-                if (node.kind === 69 /* Identifier */ ||
-                    node.kind === 97 /* ThisKeyword */ ||
-                    node.kind === 165 /* ThisType */ ||
-                    node.kind === 95 /* SuperKeyword */ ||
-                    node.kind === 9 /* StringLiteral */ ||
-                    ts.isLiteralNameOfPropertyDeclarationOrIndexAccess(node)) {
-                    var referencedSymbols = ts.FindAllReferences.getReferencedSymbolsForNode(typeChecker, cancellationToken, node, sourceFilesToSearch, /*findInStrings*/ false, /*findInComments*/ false, /*implementations*/ false);
-                    return convertReferencedSymbols(referencedSymbols);
+            function highlightSpans(nodes) {
+                return nodes && nodes.map(function (node) { return getHighlightSpanForNode(node, sourceFile); });
+            }
+        }
+        /**
+         * Aggregates all throw-statements within this node *without* crossing
+         * into function boundaries and try-blocks with catch-clauses.
+         */
+        function aggregateOwnedThrowStatements(node) {
+            var statementAccumulator = [];
+            aggregate(node);
+            return statementAccumulator;
+            function aggregate(node) {
+                if (node.kind === 223 /* ThrowStatement */) {
+                    statementAccumulator.push(node);
+                }
+                else if (node.kind === 224 /* TryStatement */) {
+                    var tryStatement = node;
+                    if (tryStatement.catchClause) {
+                        aggregate(tryStatement.catchClause);
+                    }
+                    else {
+                        // Exceptions thrown within a try block lacking a catch clause
+                        // are "owned" in the current context.
+                        aggregate(tryStatement.tryBlock);
+                    }
+                    if (tryStatement.finallyBlock) {
+                        aggregate(tryStatement.finallyBlock);
+                    }
                 }
-                return undefined;
-                function convertReferencedSymbols(referencedSymbols) {
-                    if (!referencedSymbols) {
-                        return undefined;
+                else if (!ts.isFunctionLike(node)) {
+                    ts.forEachChild(node, aggregate);
+                }
+            }
+        }
+        /**
+         * For lack of a better name, this function takes a throw statement and returns the
+         * nearest ancestor that is a try-block (whose try statement has a catch clause),
+         * function-block, or source file.
+         */
+        function getThrowStatementOwner(throwStatement) {
+            var child = throwStatement;
+            while (child.parent) {
+                var parent_21 = child.parent;
+                if (ts.isFunctionBlock(parent_21) || parent_21.kind === 265 /* SourceFile */) {
+                    return parent_21;
+                }
+                // A throw-statement is only owned by a try-statement if the try-statement has
+                // a catch clause, and if the throw-statement occurs within the try block.
+                if (parent_21.kind === 224 /* TryStatement */) {
+                    var tryStatement = parent_21;
+                    if (tryStatement.tryBlock === child && tryStatement.catchClause) {
+                        return child;
                     }
-                    var fileNameToDocumentHighlights = ts.createMap();
-                    var result = [];
-                    for (var _i = 0, referencedSymbols_1 = referencedSymbols; _i < referencedSymbols_1.length; _i++) {
-                        var referencedSymbol = referencedSymbols_1[_i];
-                        for (var _a = 0, _b = referencedSymbol.references; _a < _b.length; _a++) {
-                            var referenceEntry = _b[_a];
-                            var fileName = referenceEntry.fileName;
-                            var documentHighlights = fileNameToDocumentHighlights[fileName];
-                            if (!documentHighlights) {
-                                documentHighlights = { fileName: fileName, highlightSpans: [] };
-                                fileNameToDocumentHighlights[fileName] = documentHighlights;
-                                result.push(documentHighlights);
-                            }
-                            documentHighlights.highlightSpans.push({
-                                textSpan: referenceEntry.textSpan,
-                                kind: referenceEntry.isWriteAccess ? ts.HighlightSpanKind.writtenReference : ts.HighlightSpanKind.reference
-                            });
+                }
+                child = parent_21;
+            }
+            return undefined;
+        }
+        function aggregateAllBreakAndContinueStatements(node) {
+            var statementAccumulator = [];
+            aggregate(node);
+            return statementAccumulator;
+            function aggregate(node) {
+                if (node.kind === 218 /* BreakStatement */ || node.kind === 217 /* ContinueStatement */) {
+                    statementAccumulator.push(node);
+                }
+                else if (!ts.isFunctionLike(node)) {
+                    ts.forEachChild(node, aggregate);
+                }
+            }
+        }
+        function ownsBreakOrContinueStatement(owner, statement) {
+            var actualOwner = getBreakOrContinueOwner(statement);
+            return actualOwner && actualOwner === owner;
+        }
+        function getBreakOrContinueOwner(statement) {
+            for (var node = statement.parent; node; node = node.parent) {
+                switch (node.kind) {
+                    case 221 /* SwitchStatement */:
+                        if (statement.kind === 217 /* ContinueStatement */) {
+                            continue;
                         }
-                    }
-                    return result;
+                    // falls through
+                    case 214 /* ForStatement */:
+                    case 215 /* ForInStatement */:
+                    case 216 /* ForOfStatement */:
+                    case 213 /* WhileStatement */:
+                    case 212 /* DoStatement */:
+                        if (!statement.label || isLabeledBy(node, statement.label.text)) {
+                            return node;
+                        }
+                        break;
+                    default:
+                        // Don't cross function boundaries.
+                        if (ts.isFunctionLike(node)) {
+                            return undefined;
+                        }
+                        break;
                 }
             }
-            function getSyntacticDocumentHighlights(node) {
-                var fileName = sourceFile.fileName;
-                var highlightSpans = getHighlightSpans(node);
-                if (!highlightSpans || highlightSpans.length === 0) {
+            return undefined;
+        }
+        function getModifierOccurrences(modifier, declaration) {
+            var container = declaration.parent;
+            // Make sure we only highlight the keyword when it makes sense to do so.
+            if (ts.isAccessibilityModifier(modifier)) {
+                if (!(container.kind === 229 /* ClassDeclaration */ ||
+                    container.kind === 199 /* ClassExpression */ ||
+                    (declaration.kind === 146 /* Parameter */ && hasKind(container, 152 /* Constructor */)))) {
                     return undefined;
                 }
-                return [{ fileName: fileName, highlightSpans: highlightSpans }];
-                // returns true if 'node' is defined and has a matching 'kind'.
-                function hasKind(node, kind) {
-                    return node !== undefined && node.kind === kind;
+            }
+            else if (modifier === 115 /* StaticKeyword */) {
+                if (!(container.kind === 229 /* ClassDeclaration */ || container.kind === 199 /* ClassExpression */)) {
+                    return undefined;
                 }
-                // Null-propagating 'parent' function.
-                function parent(node) {
-                    return node && node.parent;
+            }
+            else if (modifier === 84 /* ExportKeyword */ || modifier === 124 /* DeclareKeyword */) {
+                if (!(container.kind === 234 /* ModuleBlock */ || container.kind === 265 /* SourceFile */)) {
+                    return undefined;
                 }
-                function getHighlightSpans(node) {
-                    if (node) {
-                        switch (node.kind) {
-                            case 88 /* IfKeyword */:
-                            case 80 /* ElseKeyword */:
-                                if (hasKind(node.parent, 203 /* IfStatement */)) {
-                                    return getIfElseOccurrences(node.parent);
-                                }
-                                break;
-                            case 94 /* ReturnKeyword */:
-                                if (hasKind(node.parent, 211 /* ReturnStatement */)) {
-                                    return getReturnOccurrences(node.parent);
-                                }
-                                break;
-                            case 98 /* ThrowKeyword */:
-                                if (hasKind(node.parent, 215 /* ThrowStatement */)) {
-                                    return getThrowOccurrences(node.parent);
-                                }
-                                break;
-                            case 72 /* CatchKeyword */:
-                                if (hasKind(parent(parent(node)), 216 /* TryStatement */)) {
-                                    return getTryCatchFinallyOccurrences(node.parent.parent);
-                                }
-                                break;
-                            case 100 /* TryKeyword */:
-                            case 85 /* FinallyKeyword */:
-                                if (hasKind(parent(node), 216 /* TryStatement */)) {
-                                    return getTryCatchFinallyOccurrences(node.parent);
-                                }
-                                break;
-                            case 96 /* SwitchKeyword */:
-                                if (hasKind(node.parent, 213 /* SwitchStatement */)) {
-                                    return getSwitchCaseDefaultOccurrences(node.parent);
-                                }
-                                break;
-                            case 71 /* CaseKeyword */:
-                            case 77 /* DefaultKeyword */:
-                                if (hasKind(parent(parent(parent(node))), 213 /* SwitchStatement */)) {
-                                    return getSwitchCaseDefaultOccurrences(node.parent.parent.parent);
-                                }
-                                break;
-                            case 70 /* BreakKeyword */:
-                            case 75 /* ContinueKeyword */:
-                                if (hasKind(node.parent, 210 /* BreakStatement */) || hasKind(node.parent, 209 /* ContinueStatement */)) {
-                                    return getBreakOrContinueStatementOccurrences(node.parent);
-                                }
-                                break;
-                            case 86 /* ForKeyword */:
-                                if (hasKind(node.parent, 206 /* ForStatement */) ||
-                                    hasKind(node.parent, 207 /* ForInStatement */) ||
-                                    hasKind(node.parent, 208 /* ForOfStatement */)) {
-                                    return getLoopBreakContinueOccurrences(node.parent);
-                                }
-                                break;
-                            case 104 /* WhileKeyword */:
-                            case 79 /* DoKeyword */:
-                                if (hasKind(node.parent, 205 /* WhileStatement */) || hasKind(node.parent, 204 /* DoStatement */)) {
-                                    return getLoopBreakContinueOccurrences(node.parent);
-                                }
-                                break;
-                            case 121 /* ConstructorKeyword */:
-                                if (hasKind(node.parent, 148 /* Constructor */)) {
-                                    return getConstructorOccurrences(node.parent);
-                                }
-                                break;
-                            case 123 /* GetKeyword */:
-                            case 131 /* SetKeyword */:
-                                if (hasKind(node.parent, 149 /* GetAccessor */) || hasKind(node.parent, 150 /* SetAccessor */)) {
-                                    return getGetAndSetOccurrences(node.parent);
-                                }
-                                break;
-                            default:
-                                if (ts.isModifierKind(node.kind) && node.parent &&
-                                    (ts.isDeclaration(node.parent) || node.parent.kind === 200 /* VariableStatement */)) {
-                                    return getModifierOccurrences(node.kind, node.parent);
-                                }
-                        }
-                    }
+            }
+            else if (modifier === 117 /* AbstractKeyword */) {
+                if (!(container.kind === 229 /* ClassDeclaration */ || declaration.kind === 229 /* ClassDeclaration */)) {
                     return undefined;
                 }
-                /**
-                 * Aggregates all throw-statements within this node *without* crossing
-                 * into function boundaries and try-blocks with catch-clauses.
-                 */
-                function aggregateOwnedThrowStatements(node) {
-                    var statementAccumulator = [];
-                    aggregate(node);
-                    return statementAccumulator;
-                    function aggregate(node) {
-                        if (node.kind === 215 /* ThrowStatement */) {
-                            statementAccumulator.push(node);
-                        }
-                        else if (node.kind === 216 /* TryStatement */) {
-                            var tryStatement = node;
-                            if (tryStatement.catchClause) {
-                                aggregate(tryStatement.catchClause);
-                            }
-                            else {
-                                // Exceptions thrown within a try block lacking a catch clause
-                                // are "owned" in the current context.
-                                aggregate(tryStatement.tryBlock);
-                            }
-                            if (tryStatement.finallyBlock) {
-                                aggregate(tryStatement.finallyBlock);
-                            }
-                        }
-                        else if (!ts.isFunctionLike(node)) {
-                            ts.forEachChild(node, aggregate);
+            }
+            else {
+                // unsupported modifier
+                return undefined;
+            }
+            var keywords = [];
+            var modifierFlag = getFlagFromModifier(modifier);
+            var nodes;
+            switch (container.kind) {
+                case 234 /* ModuleBlock */:
+                case 265 /* SourceFile */:
+                    // Container is either a class declaration or the declaration is a classDeclaration
+                    if (modifierFlag & 128 /* Abstract */) {
+                        nodes = declaration.members.concat(declaration);
+                    }
+                    else {
+                        nodes = container.statements;
+                    }
+                    break;
+                case 152 /* Constructor */:
+                    nodes = container.parameters.concat(container.parent.members);
+                    break;
+                case 229 /* ClassDeclaration */:
+                case 199 /* ClassExpression */:
+                    nodes = container.members;
+                    // If we're an accessibility modifier, we're in an instance member and should search
+                    // the constructor's parameter list for instance members as well.
+                    if (modifierFlag & 28 /* AccessibilityModifier */) {
+                        var constructor = ts.forEach(container.members, function (member) {
+                            return member.kind === 152 /* Constructor */ && member;
+                        });
+                        if (constructor) {
+                            nodes = nodes.concat(constructor.parameters);
                         }
                     }
+                    else if (modifierFlag & 128 /* Abstract */) {
+                        nodes = nodes.concat(container);
+                    }
+                    break;
+                default:
+                    ts.Debug.fail("Invalid container kind.");
+            }
+            ts.forEach(nodes, function (node) {
+                if (ts.getModifierFlags(node) & modifierFlag) {
+                    ts.forEach(node.modifiers, function (child) { return pushKeywordIf(keywords, child, modifier); });
                 }
-                /**
-                 * For lack of a better name, this function takes a throw statement and returns the
-                 * nearest ancestor that is a try-block (whose try statement has a catch clause),
-                 * function-block, or source file.
-                 */
-                function getThrowStatementOwner(throwStatement) {
-                    var child = throwStatement;
-                    while (child.parent) {
-                        var parent_20 = child.parent;
-                        if (ts.isFunctionBlock(parent_20) || parent_20.kind === 256 /* SourceFile */) {
-                            return parent_20;
-                        }
-                        // A throw-statement is only owned by a try-statement if the try-statement has
-                        // a catch clause, and if the throw-statement occurs within the try block.
-                        if (parent_20.kind === 216 /* TryStatement */) {
-                            var tryStatement = parent_20;
-                            if (tryStatement.tryBlock === child && tryStatement.catchClause) {
-                                return child;
-                            }
+            });
+            return keywords;
+            function getFlagFromModifier(modifier) {
+                switch (modifier) {
+                    case 114 /* PublicKeyword */:
+                        return 4 /* Public */;
+                    case 112 /* PrivateKeyword */:
+                        return 8 /* Private */;
+                    case 113 /* ProtectedKeyword */:
+                        return 16 /* Protected */;
+                    case 115 /* StaticKeyword */:
+                        return 32 /* Static */;
+                    case 84 /* ExportKeyword */:
+                        return 1 /* Export */;
+                    case 124 /* DeclareKeyword */:
+                        return 2 /* Ambient */;
+                    case 117 /* AbstractKeyword */:
+                        return 128 /* Abstract */;
+                    default:
+                        ts.Debug.fail();
+                }
+            }
+        }
+        function pushKeywordIf(keywordList, token) {
+            var expected = [];
+            for (var _i = 2; _i < arguments.length; _i++) {
+                expected[_i - 2] = arguments[_i];
+            }
+            if (token && ts.contains(expected, token.kind)) {
+                keywordList.push(token);
+                return true;
+            }
+            return false;
+        }
+        function getGetAndSetOccurrences(accessorDeclaration) {
+            var keywords = [];
+            tryPushAccessorKeyword(accessorDeclaration.symbol, 153 /* GetAccessor */);
+            tryPushAccessorKeyword(accessorDeclaration.symbol, 154 /* SetAccessor */);
+            return keywords;
+            function tryPushAccessorKeyword(accessorSymbol, accessorKind) {
+                var accessor = ts.getDeclarationOfKind(accessorSymbol, accessorKind);
+                if (accessor) {
+                    ts.forEach(accessor.getChildren(), function (child) { return pushKeywordIf(keywords, child, 125 /* GetKeyword */, 135 /* SetKeyword */); });
+                }
+            }
+        }
+        function getConstructorOccurrences(constructorDeclaration) {
+            var declarations = constructorDeclaration.symbol.getDeclarations();
+            var keywords = [];
+            ts.forEach(declarations, function (declaration) {
+                ts.forEach(declaration.getChildren(), function (token) {
+                    return pushKeywordIf(keywords, token, 123 /* ConstructorKeyword */);
+                });
+            });
+            return keywords;
+        }
+        function getLoopBreakContinueOccurrences(loopNode) {
+            var keywords = [];
+            if (pushKeywordIf(keywords, loopNode.getFirstToken(), 88 /* ForKeyword */, 106 /* WhileKeyword */, 81 /* DoKeyword */)) {
+                // If we succeeded and got a do-while loop, then start looking for a 'while' keyword.
+                if (loopNode.kind === 212 /* DoStatement */) {
+                    var loopTokens = loopNode.getChildren();
+                    for (var i = loopTokens.length - 1; i >= 0; i--) {
+                        if (pushKeywordIf(keywords, loopTokens[i], 106 /* WhileKeyword */)) {
+                            break;
                         }
-                        child = parent_20;
                     }
-                    return undefined;
                 }
-                function aggregateAllBreakAndContinueStatements(node) {
-                    var statementAccumulator = [];
-                    aggregate(node);
-                    return statementAccumulator;
-                    function aggregate(node) {
-                        if (node.kind === 210 /* BreakStatement */ || node.kind === 209 /* ContinueStatement */) {
-                            statementAccumulator.push(node);
-                        }
-                        else if (!ts.isFunctionLike(node)) {
-                            ts.forEachChild(node, aggregate);
+            }
+            var breaksAndContinues = aggregateAllBreakAndContinueStatements(loopNode.statement);
+            ts.forEach(breaksAndContinues, function (statement) {
+                if (ownsBreakOrContinueStatement(loopNode, statement)) {
+                    pushKeywordIf(keywords, statement.getFirstToken(), 72 /* BreakKeyword */, 77 /* ContinueKeyword */);
+                }
+            });
+            return keywords;
+        }
+        function getBreakOrContinueStatementOccurrences(breakOrContinueStatement) {
+            var owner = getBreakOrContinueOwner(breakOrContinueStatement);
+            if (owner) {
+                switch (owner.kind) {
+                    case 214 /* ForStatement */:
+                    case 215 /* ForInStatement */:
+                    case 216 /* ForOfStatement */:
+                    case 212 /* DoStatement */:
+                    case 213 /* WhileStatement */:
+                        return getLoopBreakContinueOccurrences(owner);
+                    case 221 /* SwitchStatement */:
+                        return getSwitchCaseDefaultOccurrences(owner);
+                }
+            }
+            return undefined;
+        }
+        function getSwitchCaseDefaultOccurrences(switchStatement) {
+            var keywords = [];
+            pushKeywordIf(keywords, switchStatement.getFirstToken(), 98 /* SwitchKeyword */);
+            // Go through each clause in the switch statement, collecting the 'case'/'default' keywords.
+            ts.forEach(switchStatement.caseBlock.clauses, function (clause) {
+                pushKeywordIf(keywords, clause.getFirstToken(), 73 /* CaseKeyword */, 79 /* DefaultKeyword */);
+                var breaksAndContinues = aggregateAllBreakAndContinueStatements(clause);
+                ts.forEach(breaksAndContinues, function (statement) {
+                    if (ownsBreakOrContinueStatement(switchStatement, statement)) {
+                        pushKeywordIf(keywords, statement.getFirstToken(), 72 /* BreakKeyword */);
+                    }
+                });
+            });
+            return keywords;
+        }
+        function getTryCatchFinallyOccurrences(tryStatement, sourceFile) {
+            var keywords = [];
+            pushKeywordIf(keywords, tryStatement.getFirstToken(), 102 /* TryKeyword */);
+            if (tryStatement.catchClause) {
+                pushKeywordIf(keywords, tryStatement.catchClause.getFirstToken(), 74 /* CatchKeyword */);
+            }
+            if (tryStatement.finallyBlock) {
+                var finallyKeyword = ts.findChildOfKind(tryStatement, 87 /* FinallyKeyword */, sourceFile);
+                pushKeywordIf(keywords, finallyKeyword, 87 /* FinallyKeyword */);
+            }
+            return keywords;
+        }
+        function getThrowOccurrences(throwStatement) {
+            var owner = getThrowStatementOwner(throwStatement);
+            if (!owner) {
+                return undefined;
+            }
+            var keywords = [];
+            ts.forEach(aggregateOwnedThrowStatements(owner), function (throwStatement) {
+                pushKeywordIf(keywords, throwStatement.getFirstToken(), 100 /* ThrowKeyword */);
+            });
+            // If the "owner" is a function, then we equate 'return' and 'throw' statements in their
+            // ability to "jump out" of the function, and include occurrences for both.
+            if (ts.isFunctionBlock(owner)) {
+                ts.forEachReturnStatement(owner, function (returnStatement) {
+                    pushKeywordIf(keywords, returnStatement.getFirstToken(), 96 /* ReturnKeyword */);
+                });
+            }
+            return keywords;
+        }
+        function getReturnOccurrences(returnStatement) {
+            var func = ts.getContainingFunction(returnStatement);
+            // If we didn't find a containing function with a block body, bail out.
+            if (!(func && hasKind(func.body, 207 /* Block */))) {
+                return undefined;
+            }
+            var keywords = [];
+            ts.forEachReturnStatement(func.body, function (returnStatement) {
+                pushKeywordIf(keywords, returnStatement.getFirstToken(), 96 /* ReturnKeyword */);
+            });
+            // Include 'throw' statements that do not occur within a try block.
+            ts.forEach(aggregateOwnedThrowStatements(func.body), function (throwStatement) {
+                pushKeywordIf(keywords, throwStatement.getFirstToken(), 100 /* ThrowKeyword */);
+            });
+            return keywords;
+        }
+        function getIfElseOccurrences(ifStatement, sourceFile) {
+            var keywords = [];
+            // Traverse upwards through all parent if-statements linked by their else-branches.
+            while (hasKind(ifStatement.parent, 211 /* IfStatement */) && ifStatement.parent.elseStatement === ifStatement) {
+                ifStatement = ifStatement.parent;
+            }
+            // Now traverse back down through the else branches, aggregating if/else keywords of if-statements.
+            while (ifStatement) {
+                var children = ifStatement.getChildren();
+                pushKeywordIf(keywords, children[0], 90 /* IfKeyword */);
+                // Generally the 'else' keyword is second-to-last, so we traverse backwards.
+                for (var i = children.length - 1; i >= 0; i--) {
+                    if (pushKeywordIf(keywords, children[i], 82 /* ElseKeyword */)) {
+                        break;
+                    }
+                }
+                if (!hasKind(ifStatement.elseStatement, 211 /* IfStatement */)) {
+                    break;
+                }
+                ifStatement = ifStatement.elseStatement;
+            }
+            var result = [];
+            // We'd like to highlight else/ifs together if they are only separated by whitespace
+            // (i.e. the keywords are separated by no comments, no newlines).
+            for (var i = 0; i < keywords.length; i++) {
+                if (keywords[i].kind === 82 /* ElseKeyword */ && i < keywords.length - 1) {
+                    var elseKeyword = keywords[i];
+                    var ifKeyword = keywords[i + 1]; // this *should* always be an 'if' keyword.
+                    var shouldCombindElseAndIf = true;
+                    // Avoid recalculating getStart() by iterating backwards.
+                    for (var j = ifKeyword.getStart() - 1; j >= elseKeyword.end; j--) {
+                        if (!ts.isWhiteSpaceSingleLine(sourceFile.text.charCodeAt(j))) {
+                            shouldCombindElseAndIf = false;
+                            break;
                         }
                     }
+                    if (shouldCombindElseAndIf) {
+                        result.push({
+                            fileName: sourceFile.fileName,
+                            textSpan: ts.createTextSpanFromBounds(elseKeyword.getStart(), ifKeyword.end),
+                            kind: "reference" /* reference */
+                        });
+                        i++; // skip the next keyword
+                        continue;
+                    }
                 }
-                function ownsBreakOrContinueStatement(owner, statement) {
-                    var actualOwner = getBreakOrContinueOwner(statement);
-                    return actualOwner && actualOwner === owner;
+                // Ordinary case: just highlight the keyword.
+                result.push(getHighlightSpanForNode(keywords[i], sourceFile));
+            }
+            return result;
+        }
+        /**
+         * Whether or not a 'node' is preceded by a label of the given string.
+         * Note: 'node' cannot be a SourceFile.
+         */
+        function isLabeledBy(node, labelName) {
+            for (var owner = node.parent; owner.kind === 222 /* LabeledStatement */; owner = owner.parent) {
+                if (owner.label.text === labelName) {
+                    return true;
                 }
-                function getBreakOrContinueOwner(statement) {
-                    for (var node_1 = statement.parent; node_1; node_1 = node_1.parent) {
-                        switch (node_1.kind) {
-                            case 213 /* SwitchStatement */:
-                                if (statement.kind === 209 /* ContinueStatement */) {
-                                    continue;
+            }
+            return false;
+        }
+    })(DocumentHighlights = ts.DocumentHighlights || (ts.DocumentHighlights = {}));
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    function createDocumentRegistry(useCaseSensitiveFileNames, currentDirectory) {
+        if (currentDirectory === void 0) { currentDirectory = ""; }
+        // Maps from compiler setting target (ES3, ES5, etc.) to all the cached documents we have
+        // for those settings.
+        var buckets = ts.createMap();
+        var getCanonicalFileName = ts.createGetCanonicalFileName(!!useCaseSensitiveFileNames);
+        function getKeyForCompilationSettings(settings) {
+            return "_" + settings.target + "|" + settings.module + "|" + settings.noResolve + "|" + settings.jsx + "|" + settings.allowJs + "|" + settings.baseUrl + "|" + JSON.stringify(settings.typeRoots) + "|" + JSON.stringify(settings.rootDirs) + "|" + JSON.stringify(settings.paths);
+        }
+        function getBucketForCompilationSettings(key, createIfMissing) {
+            var bucket = buckets.get(key);
+            if (!bucket && createIfMissing) {
+                buckets.set(key, bucket = ts.createFileMap());
+            }
+            return bucket;
+        }
+        function reportStats() {
+            var bucketInfoArray = ts.arrayFrom(buckets.keys()).filter(function (name) { return name && name.charAt(0) === "_"; }).map(function (name) {
+                var entries = buckets.get(name);
+                var sourceFiles = [];
+                entries.forEachValue(function (key, entry) {
+                    sourceFiles.push({
+                        name: key,
+                        refCount: entry.languageServiceRefCount,
+                        references: entry.owners.slice(0)
+                    });
+                });
+                sourceFiles.sort(function (x, y) { return y.refCount - x.refCount; });
+                return {
+                    bucket: name,
+                    sourceFiles: sourceFiles
+                };
+            });
+            return JSON.stringify(bucketInfoArray, undefined, 2);
+        }
+        function acquireDocument(fileName, compilationSettings, scriptSnapshot, version, scriptKind) {
+            var path = ts.toPath(fileName, currentDirectory, getCanonicalFileName);
+            var key = getKeyForCompilationSettings(compilationSettings);
+            return acquireDocumentWithKey(fileName, path, compilationSettings, key, scriptSnapshot, version, scriptKind);
+        }
+        function acquireDocumentWithKey(fileName, path, compilationSettings, key, scriptSnapshot, version, scriptKind) {
+            return acquireOrUpdateDocument(fileName, path, compilationSettings, key, scriptSnapshot, version, /*acquiring*/ true, scriptKind);
+        }
+        function updateDocument(fileName, compilationSettings, scriptSnapshot, version, scriptKind) {
+            var path = ts.toPath(fileName, currentDirectory, getCanonicalFileName);
+            var key = getKeyForCompilationSettings(compilationSettings);
+            return updateDocumentWithKey(fileName, path, compilationSettings, key, scriptSnapshot, version, scriptKind);
+        }
+        function updateDocumentWithKey(fileName, path, compilationSettings, key, scriptSnapshot, version, scriptKind) {
+            return acquireOrUpdateDocument(fileName, path, compilationSettings, key, scriptSnapshot, version, /*acquiring*/ false, scriptKind);
+        }
+        function acquireOrUpdateDocument(fileName, path, compilationSettings, key, scriptSnapshot, version, acquiring, scriptKind) {
+            var bucket = getBucketForCompilationSettings(key, /*createIfMissing*/ true);
+            var entry = bucket.get(path);
+            if (!entry) {
+                ts.Debug.assert(acquiring, "How could we be trying to update a document that the registry doesn't have?");
+                // Have never seen this file with these settings.  Create a new source file for it.
+                var sourceFile = ts.createLanguageServiceSourceFile(fileName, scriptSnapshot, compilationSettings.target, version, /*setNodeParents*/ false, scriptKind);
+                entry = {
+                    sourceFile: sourceFile,
+                    languageServiceRefCount: 0,
+                    owners: []
+                };
+                bucket.set(path, entry);
+            }
+            else {
+                // We have an entry for this file.  However, it may be for a different version of
+                // the script snapshot.  If so, update it appropriately.  Otherwise, we can just
+                // return it as is.
+                if (entry.sourceFile.version !== version) {
+                    entry.sourceFile = ts.updateLanguageServiceSourceFile(entry.sourceFile, scriptSnapshot, version, scriptSnapshot.getChangeRange(entry.sourceFile.scriptSnapshot));
+                }
+            }
+            // If we're acquiring, then this is the first time this LS is asking for this document.
+            // Increase our ref count so we know there's another LS using the document.  If we're
+            // not acquiring, then that means the LS is 'updating' the file instead, and that means
+            // it has already acquired the document previously.  As such, we do not need to increase
+            // the ref count.
+            if (acquiring) {
+                entry.languageServiceRefCount++;
+            }
+            return entry.sourceFile;
+        }
+        function releaseDocument(fileName, compilationSettings) {
+            var path = ts.toPath(fileName, currentDirectory, getCanonicalFileName);
+            var key = getKeyForCompilationSettings(compilationSettings);
+            return releaseDocumentWithKey(path, key);
+        }
+        function releaseDocumentWithKey(path, key) {
+            var bucket = getBucketForCompilationSettings(key, /*createIfMissing*/ false);
+            ts.Debug.assert(bucket !== undefined);
+            var entry = bucket.get(path);
+            entry.languageServiceRefCount--;
+            ts.Debug.assert(entry.languageServiceRefCount >= 0);
+            if (entry.languageServiceRefCount === 0) {
+                bucket.remove(path);
+            }
+        }
+        return {
+            acquireDocument: acquireDocument,
+            acquireDocumentWithKey: acquireDocumentWithKey,
+            updateDocument: updateDocument,
+            updateDocumentWithKey: updateDocumentWithKey,
+            releaseDocument: releaseDocument,
+            releaseDocumentWithKey: releaseDocumentWithKey,
+            reportStats: reportStats,
+            getKeyForCompilationSettings: getKeyForCompilationSettings
+        };
+    }
+    ts.createDocumentRegistry = createDocumentRegistry;
+})(ts || (ts = {}));
+/* Code for finding imports of an exported symbol. Used only by FindAllReferences. */
+/* @internal */
+var ts;
+(function (ts) {
+    var FindAllReferences;
+    (function (FindAllReferences) {
+        /** Creates the imports map and returns an ImportTracker that uses it. Call this lazily to avoid calling `getDirectImportsMap` unnecessarily.  */
+        function createImportTracker(sourceFiles, checker, cancellationToken) {
+            var allDirectImports = getDirectImportsMap(sourceFiles, checker, cancellationToken);
+            return function (exportSymbol, exportInfo, isForRename) {
+                var _a = getImportersForExport(sourceFiles, allDirectImports, exportInfo, checker, cancellationToken), directImports = _a.directImports, indirectUsers = _a.indirectUsers;
+                return __assign({ indirectUsers: indirectUsers }, getSearchesFromDirectImports(directImports, exportSymbol, exportInfo.exportKind, checker, isForRename));
+            };
+        }
+        FindAllReferences.createImportTracker = createImportTracker;
+        var ExportKind;
+        (function (ExportKind) {
+            ExportKind[ExportKind["Named"] = 0] = "Named";
+            ExportKind[ExportKind["Default"] = 1] = "Default";
+            ExportKind[ExportKind["ExportEquals"] = 2] = "ExportEquals";
+        })(ExportKind = FindAllReferences.ExportKind || (FindAllReferences.ExportKind = {}));
+        var ImportExport;
+        (function (ImportExport) {
+            ImportExport[ImportExport["Import"] = 0] = "Import";
+            ImportExport[ImportExport["Export"] = 1] = "Export";
+        })(ImportExport = FindAllReferences.ImportExport || (FindAllReferences.ImportExport = {}));
+        /** Returns import statements that directly reference the exporting module, and a list of files that may access the module through a namespace. */
+        function getImportersForExport(sourceFiles, allDirectImports, _a, checker, cancellationToken) {
+            var exportingModuleSymbol = _a.exportingModuleSymbol, exportKind = _a.exportKind;
+            var markSeenDirectImport = ts.nodeSeenTracker();
+            var markSeenIndirectUser = ts.nodeSeenTracker();
+            var directImports = [];
+            var isAvailableThroughGlobal = !!exportingModuleSymbol.globalExports;
+            var indirectUserDeclarations = isAvailableThroughGlobal ? undefined : [];
+            handleDirectImports(exportingModuleSymbol);
+            return { directImports: directImports, indirectUsers: getIndirectUsers() };
+            function getIndirectUsers() {
+                if (isAvailableThroughGlobal) {
+                    // It has `export as namespace`, so anything could potentially use it.
+                    return sourceFiles;
+                }
+                // Module augmentations may use this module's exports without importing it.
+                for (var _i = 0, _a = exportingModuleSymbol.declarations; _i < _a.length; _i++) {
+                    var decl = _a[_i];
+                    if (ts.isExternalModuleAugmentation(decl)) {
+                        addIndirectUser(decl);
+                    }
+                }
+                // This may return duplicates (if there are multiple module declarations in a single source file, all importing the same thing as a namespace), but `State.markSearchedSymbol` will handle that.
+                return indirectUserDeclarations.map(ts.getSourceFileOfNode);
+            }
+            function handleDirectImports(exportingModuleSymbol) {
+                var theseDirectImports = getDirectImports(exportingModuleSymbol);
+                if (theseDirectImports) {
+                    for (var _i = 0, theseDirectImports_1 = theseDirectImports; _i < theseDirectImports_1.length; _i++) {
+                        var direct = theseDirectImports_1[_i];
+                        if (!markSeenDirectImport(direct)) {
+                            continue;
+                        }
+                        cancellationToken.throwIfCancellationRequested();
+                        switch (direct.kind) {
+                            case 181 /* CallExpression */:
+                                if (!isAvailableThroughGlobal) {
+                                    var parent_22 = direct.parent;
+                                    if (exportKind === 2 /* ExportEquals */ && parent_22.kind === 226 /* VariableDeclaration */) {
+                                        var name_62 = parent_22.name;
+                                        if (name_62.kind === 71 /* Identifier */) {
+                                            directImports.push(name_62);
+                                            break;
+                                        }
+                                    }
+                                    // Don't support re-exporting 'require()' calls, so just add a single indirect user.
+                                    addIndirectUser(direct.getSourceFile());
+                                }
+                                break;
+                            case 237 /* ImportEqualsDeclaration */:
+                                handleNamespaceImport(direct, direct.name, ts.hasModifier(direct, 1 /* Export */));
+                                break;
+                            case 238 /* ImportDeclaration */:
+                                var namedBindings = direct.importClause && direct.importClause.namedBindings;
+                                if (namedBindings && namedBindings.kind === 240 /* NamespaceImport */) {
+                                    handleNamespaceImport(direct, namedBindings.name);
                                 }
-                            // Fall through.
-                            case 206 /* ForStatement */:
-                            case 207 /* ForInStatement */:
-                            case 208 /* ForOfStatement */:
-                            case 205 /* WhileStatement */:
-                            case 204 /* DoStatement */:
-                                if (!statement.label || isLabeledBy(node_1, statement.label.text)) {
-                                    return node_1;
+                                else {
+                                    directImports.push(direct);
                                 }
                                 break;
-                            default:
-                                // Don't cross function boundaries.
-                                if (ts.isFunctionLike(node_1)) {
-                                    return undefined;
+                            case 244 /* ExportDeclaration */:
+                                if (!direct.exportClause) {
+                                    // This is `export * from "foo"`, so imports of this module may import the export too.
+                                    handleDirectImports(getContainingModuleSymbol(direct, checker));
+                                }
+                                else {
+                                    // This is `export { foo } from "foo"` and creates an alias symbol, so recursive search will get handle re-exports.
+                                    directImports.push(direct);
                                 }
                                 break;
                         }
                     }
-                    return undefined;
                 }
-                function getModifierOccurrences(modifier, declaration) {
-                    var container = declaration.parent;
-                    // Make sure we only highlight the keyword when it makes sense to do so.
-                    if (ts.isAccessibilityModifier(modifier)) {
-                        if (!(container.kind === 221 /* ClassDeclaration */ ||
-                            container.kind === 192 /* ClassExpression */ ||
-                            (declaration.kind === 142 /* Parameter */ && hasKind(container, 148 /* Constructor */)))) {
-                            return undefined;
-                        }
+            }
+            function handleNamespaceImport(importDeclaration, name, isReExport) {
+                if (exportKind === 2 /* ExportEquals */) {
+                    // This is a direct import, not import-as-namespace.
+                    directImports.push(importDeclaration);
+                }
+                else if (!isAvailableThroughGlobal) {
+                    var sourceFileLike = getSourceFileLikeForImportDeclaration(importDeclaration);
+                    ts.Debug.assert(sourceFileLike.kind === 265 /* SourceFile */ || sourceFileLike.kind === 233 /* ModuleDeclaration */);
+                    if (isReExport || findNamespaceReExports(sourceFileLike, name, checker)) {
+                        addIndirectUsers(sourceFileLike);
                     }
-                    else if (modifier === 113 /* StaticKeyword */) {
-                        if (!(container.kind === 221 /* ClassDeclaration */ || container.kind === 192 /* ClassExpression */)) {
-                            return undefined;
-                        }
+                    else {
+                        addIndirectUser(sourceFileLike);
                     }
-                    else if (modifier === 82 /* ExportKeyword */ || modifier === 122 /* DeclareKeyword */) {
-                        if (!(container.kind === 226 /* ModuleBlock */ || container.kind === 256 /* SourceFile */)) {
-                            return undefined;
-                        }
+                }
+            }
+            function addIndirectUser(sourceFileLike) {
+                ts.Debug.assert(!isAvailableThroughGlobal);
+                var isNew = markSeenIndirectUser(sourceFileLike);
+                if (isNew) {
+                    indirectUserDeclarations.push(sourceFileLike);
+                }
+                return isNew;
+            }
+            /** Adds a module and all of its transitive dependencies as possible indirect users. */
+            function addIndirectUsers(sourceFileLike) {
+                if (!addIndirectUser(sourceFileLike)) {
+                    return;
+                }
+                var moduleSymbol = checker.getMergedSymbol(sourceFileLike.symbol);
+                ts.Debug.assert(!!(moduleSymbol.flags & 1536 /* Module */));
+                var directImports = getDirectImports(moduleSymbol);
+                if (directImports) {
+                    for (var _i = 0, directImports_1 = directImports; _i < directImports_1.length; _i++) {
+                        var directImport = directImports_1[_i];
+                        addIndirectUsers(getSourceFileLikeForImportDeclaration(directImport));
                     }
-                    else if (modifier === 115 /* AbstractKeyword */) {
-                        if (!(container.kind === 221 /* ClassDeclaration */ || declaration.kind === 221 /* ClassDeclaration */)) {
-                            return undefined;
-                        }
+                }
+            }
+            function getDirectImports(moduleSymbol) {
+                return allDirectImports.get(ts.getSymbolId(moduleSymbol).toString());
+            }
+        }
+        /**
+         * Given the set of direct imports of a module, we need to find which ones import the particular exported symbol.
+         * The returned `importSearches` will result in the entire source file being searched.
+         * But re-exports will be placed in 'singleReferences' since they cannot be locally referenced.
+         */
+        function getSearchesFromDirectImports(directImports, exportSymbol, exportKind, checker, isForRename) {
+            var exportName = exportSymbol.name;
+            var importSearches = [];
+            var singleReferences = [];
+            function addSearch(location, symbol) {
+                importSearches.push([location, symbol]);
+            }
+            if (directImports) {
+                for (var _i = 0, directImports_2 = directImports; _i < directImports_2.length; _i++) {
+                    var decl = directImports_2[_i];
+                    handleImport(decl);
+                }
+            }
+            return { importSearches: importSearches, singleReferences: singleReferences };
+            function handleImport(decl) {
+                if (decl.kind === 237 /* ImportEqualsDeclaration */) {
+                    if (isExternalModuleImportEquals(decl)) {
+                        handleNamespaceImportLike(decl.name);
                     }
-                    else {
-                        // unsupported modifier
-                        return undefined;
+                    return;
+                }
+                if (decl.kind === 71 /* Identifier */) {
+                    handleNamespaceImportLike(decl);
+                    return;
+                }
+                // Ignore if there's a grammar error
+                if (decl.moduleSpecifier.kind !== 9 /* StringLiteral */) {
+                    return;
+                }
+                if (decl.kind === 244 /* ExportDeclaration */) {
+                    searchForNamedImport(decl.exportClause);
+                    return;
+                }
+                if (!decl.importClause) {
+                    return;
+                }
+                var importClause = decl.importClause;
+                var namedBindings = importClause.namedBindings;
+                if (namedBindings && namedBindings.kind === 240 /* NamespaceImport */) {
+                    handleNamespaceImportLike(namedBindings.name);
+                    return;
+                }
+                if (exportKind === 0 /* Named */) {
+                    searchForNamedImport(namedBindings);
+                }
+                else {
+                    // `export =` might be imported by a default import if `--allowSyntheticDefaultImports` is on, so this handles both ExportKind.Default and ExportKind.ExportEquals
+                    var name_63 = importClause.name;
+                    // If a default import has the same name as the default export, allow to rename it.
+                    // Given `import f` and `export default function f`, we will rename both, but for `import g` we will rename just that.
+                    if (name_63 && (!isForRename || name_63.text === symbolName(exportSymbol))) {
+                        var defaultImportAlias = checker.getSymbolAtLocation(name_63);
+                        addSearch(name_63, defaultImportAlias);
                     }
-                    var keywords = [];
-                    var modifierFlag = getFlagFromModifier(modifier);
-                    var nodes;
-                    switch (container.kind) {
-                        case 226 /* ModuleBlock */:
-                        case 256 /* SourceFile */:
-                            // Container is either a class declaration or the declaration is a classDeclaration
-                            if (modifierFlag & 128 /* Abstract */) {
-                                nodes = declaration.members.concat(declaration);
-                            }
-                            else {
-                                nodes = container.statements;
-                            }
-                            break;
-                        case 148 /* Constructor */:
-                            nodes = container.parameters.concat(container.parent.members);
-                            break;
-                        case 221 /* ClassDeclaration */:
-                        case 192 /* ClassExpression */:
-                            nodes = container.members;
-                            // If we're an accessibility modifier, we're in an instance member and should search
-                            // the constructor's parameter list for instance members as well.
-                            if (modifierFlag & 28 /* AccessibilityModifier */) {
-                                var constructor = ts.forEach(container.members, function (member) {
-                                    return member.kind === 148 /* Constructor */ && member;
-                                });
-                                if (constructor) {
-                                    nodes = nodes.concat(constructor.parameters);
-                                }
-                            }
-                            else if (modifierFlag & 128 /* Abstract */) {
-                                nodes = nodes.concat(container);
-                            }
-                            break;
-                        default:
-                            ts.Debug.fail("Invalid container kind.");
+                    // 'default' might be accessed as a named import `{ default as foo }`.
+                    if (!isForRename && exportKind === 1 /* Default */) {
+                        ts.Debug.assert(exportName === "default");
+                        searchForNamedImport(namedBindings);
                     }
-                    ts.forEach(nodes, function (node) {
-                        if (ts.getModifierFlags(node) & modifierFlag) {
-                            ts.forEach(node.modifiers, function (child) { return pushKeywordIf(keywords, child, modifier); });
+                }
+            }
+            /**
+             * `import x = require("./x") or `import * as x from "./x"`.
+             * An `export =` may be imported by this syntax, so it may be a direct import.
+             * If it's not a direct import, it will be in `indirectUsers`, so we don't have to do anything here.
+             */
+            function handleNamespaceImportLike(importName) {
+                // Don't rename an import that already has a different name than the export.
+                if (exportKind === 2 /* ExportEquals */ && (!isForRename || importName.text === exportName)) {
+                    addSearch(importName, checker.getSymbolAtLocation(importName));
+                }
+            }
+            function searchForNamedImport(namedBindings) {
+                if (namedBindings) {
+                    for (var _i = 0, _a = namedBindings.elements; _i < _a.length; _i++) {
+                        var element = _a[_i];
+                        var name_64 = element.name, propertyName = element.propertyName;
+                        if ((propertyName || name_64).text !== exportName) {
+                            continue;
                         }
-                    });
-                    return ts.map(keywords, getHighlightSpanForNode);
-                    function getFlagFromModifier(modifier) {
-                        switch (modifier) {
-                            case 112 /* PublicKeyword */:
-                                return 4 /* Public */;
-                            case 110 /* PrivateKeyword */:
-                                return 8 /* Private */;
-                            case 111 /* ProtectedKeyword */:
-                                return 16 /* Protected */;
-                            case 113 /* StaticKeyword */:
-                                return 32 /* Static */;
-                            case 82 /* ExportKeyword */:
-                                return 1 /* Export */;
-                            case 122 /* DeclareKeyword */:
-                                return 2 /* Ambient */;
-                            case 115 /* AbstractKeyword */:
-                                return 128 /* Abstract */;
-                            default:
-                                ts.Debug.fail();
+                        if (propertyName) {
+                            // This is `import { foo as bar } from "./a"` or `export { foo as bar } from "./a"`. `foo` isn't a local in the file, so just add it as a single reference.
+                            singleReferences.push(propertyName);
+                            if (!isForRename) {
+                                // Search locally for `bar`.
+                                addSearch(name_64, checker.getSymbolAtLocation(name_64));
+                            }
+                        }
+                        else {
+                            var localSymbol = element.kind === 246 /* ExportSpecifier */ && element.propertyName
+                                ? checker.getExportSpecifierLocalTargetSymbol(element) // For re-exporting under a different name, we want to get the re-exported symbol.
+                                : checker.getSymbolAtLocation(name_64);
+                            addSearch(name_64, localSymbol);
                         }
                     }
                 }
-                function pushKeywordIf(keywordList, token) {
-                    var expected = [];
-                    for (var _i = 2; _i < arguments.length; _i++) {
-                        expected[_i - 2] = arguments[_i];
-                    }
-                    if (token && ts.contains(expected, token.kind)) {
-                        keywordList.push(token);
+            }
+        }
+        /** Returns 'true' is the namespace 'name' is re-exported from this module, and 'false' if it is only used locally. */
+        function findNamespaceReExports(sourceFileLike, name, checker) {
+            var namespaceImportSymbol = checker.getSymbolAtLocation(name);
+            return forEachPossibleImportOrExportStatement(sourceFileLike, function (statement) {
+                if (statement.kind !== 244 /* ExportDeclaration */)
+                    return;
+                var _a = statement, exportClause = _a.exportClause, moduleSpecifier = _a.moduleSpecifier;
+                if (moduleSpecifier || !exportClause)
+                    return;
+                for (var _i = 0, _b = exportClause.elements; _i < _b.length; _i++) {
+                    var element = _b[_i];
+                    if (checker.getExportSpecifierLocalTargetSymbol(element) === namespaceImportSymbol) {
                         return true;
                     }
-                    return false;
-                }
-                function getGetAndSetOccurrences(accessorDeclaration) {
-                    var keywords = [];
-                    tryPushAccessorKeyword(accessorDeclaration.symbol, 149 /* GetAccessor */);
-                    tryPushAccessorKeyword(accessorDeclaration.symbol, 150 /* SetAccessor */);
-                    return ts.map(keywords, getHighlightSpanForNode);
-                    function tryPushAccessorKeyword(accessorSymbol, accessorKind) {
-                        var accessor = ts.getDeclarationOfKind(accessorSymbol, accessorKind);
-                        if (accessor) {
-                            ts.forEach(accessor.getChildren(), function (child) { return pushKeywordIf(keywords, child, 123 /* GetKeyword */, 131 /* SetKeyword */); });
-                        }
-                    }
                 }
-                function getConstructorOccurrences(constructorDeclaration) {
-                    var declarations = constructorDeclaration.symbol.getDeclarations();
-                    var keywords = [];
-                    ts.forEach(declarations, function (declaration) {
-                        ts.forEach(declaration.getChildren(), function (token) {
-                            return pushKeywordIf(keywords, token, 121 /* ConstructorKeyword */);
-                        });
-                    });
-                    return ts.map(keywords, getHighlightSpanForNode);
-                }
-                function getLoopBreakContinueOccurrences(loopNode) {
-                    var keywords = [];
-                    if (pushKeywordIf(keywords, loopNode.getFirstToken(), 86 /* ForKeyword */, 104 /* WhileKeyword */, 79 /* DoKeyword */)) {
-                        // If we succeeded and got a do-while loop, then start looking for a 'while' keyword.
-                        if (loopNode.kind === 204 /* DoStatement */) {
-                            var loopTokens = loopNode.getChildren();
-                            for (var i = loopTokens.length - 1; i >= 0; i--) {
-                                if (pushKeywordIf(keywords, loopTokens[i], 104 /* WhileKeyword */)) {
-                                    break;
-                                }
-                            }
+            });
+        }
+        function findModuleReferences(program, sourceFiles, searchModuleSymbol) {
+            var refs = [];
+            var checker = program.getTypeChecker();
+            for (var _i = 0, sourceFiles_4 = sourceFiles; _i < sourceFiles_4.length; _i++) {
+                var referencingFile = sourceFiles_4[_i];
+                var searchSourceFile = searchModuleSymbol.valueDeclaration;
+                if (searchSourceFile.kind === 265 /* SourceFile */) {
+                    for (var _a = 0, _b = referencingFile.referencedFiles; _a < _b.length; _a++) {
+                        var ref = _b[_a];
+                        if (program.getSourceFileFromReference(referencingFile, ref) === searchSourceFile) {
+                            refs.push({ kind: "reference", referencingFile: referencingFile, ref: ref });
                         }
                     }
-                    var breaksAndContinues = aggregateAllBreakAndContinueStatements(loopNode.statement);
-                    ts.forEach(breaksAndContinues, function (statement) {
-                        if (ownsBreakOrContinueStatement(loopNode, statement)) {
-                            pushKeywordIf(keywords, statement.getFirstToken(), 70 /* BreakKeyword */, 75 /* ContinueKeyword */);
-                        }
-                    });
-                    return ts.map(keywords, getHighlightSpanForNode);
-                }
-                function getBreakOrContinueStatementOccurrences(breakOrContinueStatement) {
-                    var owner = getBreakOrContinueOwner(breakOrContinueStatement);
-                    if (owner) {
-                        switch (owner.kind) {
-                            case 206 /* ForStatement */:
-                            case 207 /* ForInStatement */:
-                            case 208 /* ForOfStatement */:
-                            case 204 /* DoStatement */:
-                            case 205 /* WhileStatement */:
-                                return getLoopBreakContinueOccurrences(owner);
-                            case 213 /* SwitchStatement */:
-                                return getSwitchCaseDefaultOccurrences(owner);
+                    for (var _c = 0, _d = referencingFile.typeReferenceDirectives; _c < _d.length; _c++) {
+                        var ref = _d[_c];
+                        var referenced = program.getResolvedTypeReferenceDirectives().get(ref.fileName);
+                        if (referenced !== undefined && referenced.resolvedFileName === searchSourceFile.fileName) {
+                            refs.push({ kind: "reference", referencingFile: referencingFile, ref: ref });
                         }
                     }
-                    return undefined;
-                }
-                function getSwitchCaseDefaultOccurrences(switchStatement) {
-                    var keywords = [];
-                    pushKeywordIf(keywords, switchStatement.getFirstToken(), 96 /* SwitchKeyword */);
-                    // Go through each clause in the switch statement, collecting the 'case'/'default' keywords.
-                    ts.forEach(switchStatement.caseBlock.clauses, function (clause) {
-                        pushKeywordIf(keywords, clause.getFirstToken(), 71 /* CaseKeyword */, 77 /* DefaultKeyword */);
-                        var breaksAndContinues = aggregateAllBreakAndContinueStatements(clause);
-                        ts.forEach(breaksAndContinues, function (statement) {
-                            if (ownsBreakOrContinueStatement(switchStatement, statement)) {
-                                pushKeywordIf(keywords, statement.getFirstToken(), 70 /* BreakKeyword */);
-                            }
-                        });
-                    });
-                    return ts.map(keywords, getHighlightSpanForNode);
                 }
-                function getTryCatchFinallyOccurrences(tryStatement) {
-                    var keywords = [];
-                    pushKeywordIf(keywords, tryStatement.getFirstToken(), 100 /* TryKeyword */);
-                    if (tryStatement.catchClause) {
-                        pushKeywordIf(keywords, tryStatement.catchClause.getFirstToken(), 72 /* CatchKeyword */);
+                forEachImport(referencingFile, function (_importDecl, moduleSpecifier) {
+                    var moduleSymbol = checker.getSymbolAtLocation(moduleSpecifier);
+                    if (moduleSymbol === searchModuleSymbol) {
+                        refs.push({ kind: "import", literal: moduleSpecifier });
                     }
-                    if (tryStatement.finallyBlock) {
-                        var finallyKeyword = ts.findChildOfKind(tryStatement, 85 /* FinallyKeyword */, sourceFile);
-                        pushKeywordIf(keywords, finallyKeyword, 85 /* FinallyKeyword */);
+                });
+            }
+            return refs;
+        }
+        FindAllReferences.findModuleReferences = findModuleReferences;
+        /** Returns a map from a module symbol Id to all import statements that directly reference the module. */
+        function getDirectImportsMap(sourceFiles, checker, cancellationToken) {
+            var map = ts.createMap();
+            for (var _i = 0, sourceFiles_5 = sourceFiles; _i < sourceFiles_5.length; _i++) {
+                var sourceFile = sourceFiles_5[_i];
+                cancellationToken.throwIfCancellationRequested();
+                forEachImport(sourceFile, function (importDecl, moduleSpecifier) {
+                    var moduleSymbol = checker.getSymbolAtLocation(moduleSpecifier);
+                    if (moduleSymbol) {
+                        var id = ts.getSymbolId(moduleSymbol).toString();
+                        var imports = map.get(id);
+                        if (!imports) {
+                            map.set(id, imports = []);
+                        }
+                        imports.push(importDecl);
                     }
-                    return ts.map(keywords, getHighlightSpanForNode);
+                });
+            }
+            return map;
+        }
+        /** Iterates over all statements at the top level or in module declarations. Returns the first truthy result. */
+        function forEachPossibleImportOrExportStatement(sourceFileLike, action) {
+            return ts.forEach(sourceFileLike.kind === 265 /* SourceFile */ ? sourceFileLike.statements : sourceFileLike.body.statements, function (statement) {
+                return action(statement) || (isAmbientModuleDeclaration(statement) && ts.forEach(statement.body && statement.body.statements, action));
+            });
+        }
+        /** Calls `action` for each import, re-export, or require() in a file. */
+        function forEachImport(sourceFile, action) {
+            if (sourceFile.externalModuleIndicator || sourceFile.imports !== undefined) {
+                for (var _i = 0, _a = sourceFile.imports; _i < _a.length; _i++) {
+                    var moduleSpecifier = _a[_i];
+                    action(importerFromModuleSpecifier(moduleSpecifier), moduleSpecifier);
                 }
-                function getThrowOccurrences(throwStatement) {
-                    var owner = getThrowStatementOwner(throwStatement);
-                    if (!owner) {
-                        return undefined;
+            }
+            else {
+                forEachPossibleImportOrExportStatement(sourceFile, function (statement) {
+                    switch (statement.kind) {
+                        case 244 /* ExportDeclaration */:
+                        case 238 /* ImportDeclaration */: {
+                            var decl = statement;
+                            if (decl.moduleSpecifier && decl.moduleSpecifier.kind === 9 /* StringLiteral */) {
+                                action(decl, decl.moduleSpecifier);
+                            }
+                            break;
+                        }
+                        case 237 /* ImportEqualsDeclaration */: {
+                            var decl = statement;
+                            var moduleReference = decl.moduleReference;
+                            if (moduleReference.kind === 248 /* ExternalModuleReference */ &&
+                                moduleReference.expression.kind === 9 /* StringLiteral */) {
+                                action(decl, moduleReference.expression);
+                            }
+                            break;
+                        }
                     }
-                    var keywords = [];
-                    ts.forEach(aggregateOwnedThrowStatements(owner), function (throwStatement) {
-                        pushKeywordIf(keywords, throwStatement.getFirstToken(), 98 /* ThrowKeyword */);
-                    });
-                    // If the "owner" is a function, then we equate 'return' and 'throw' statements in their
-                    // ability to "jump out" of the function, and include occurrences for both.
-                    if (ts.isFunctionBlock(owner)) {
-                        ts.forEachReturnStatement(owner, function (returnStatement) {
-                            pushKeywordIf(keywords, returnStatement.getFirstToken(), 94 /* ReturnKeyword */);
-                        });
+                });
+            }
+        }
+        function importerFromModuleSpecifier(moduleSpecifier) {
+            var decl = moduleSpecifier.parent;
+            switch (decl.kind) {
+                case 181 /* CallExpression */:
+                case 238 /* ImportDeclaration */:
+                case 244 /* ExportDeclaration */:
+                    return decl;
+                case 248 /* ExternalModuleReference */:
+                    return decl.parent;
+                default:
+                    ts.Debug.fail("Unexpected module specifier parent: " + decl.kind);
+            }
+        }
+        /**
+         * Given a local reference, we might notice that it's an import/export and recursively search for references of that.
+         * If at an import, look locally for the symbol it imports.
+         * If an an export, look for all imports of it.
+         * This doesn't handle export specifiers; that is done in `getReferencesAtExportSpecifier`.
+         * @param comingFromExport If we are doing a search for all exports, don't bother looking backwards for the imported symbol, since that's the reason we're here.
+         */
+        function getImportOrExportSymbol(node, symbol, checker, comingFromExport) {
+            return comingFromExport ? getExport() : getExport() || getImport();
+            function getExport() {
+                var parent = node.parent;
+                if (symbol.flags & 7340032 /* Export */) {
+                    if (parent.kind === 179 /* PropertyAccessExpression */) {
+                        // When accessing an export of a JS module, there's no alias. The symbol will still be flagged as an export even though we're at the use.
+                        // So check that we are at the declaration.
+                        return symbol.declarations.some(function (d) { return d === parent; }) && ts.isBinaryExpression(parent.parent)
+                            ? getSpecialPropertyExport(parent.parent, /*useLhsSymbol*/ false)
+                            : undefined;
                     }
-                    return ts.map(keywords, getHighlightSpanForNode);
-                }
-                function getReturnOccurrences(returnStatement) {
-                    var func = ts.getContainingFunction(returnStatement);
-                    // If we didn't find a containing function with a block body, bail out.
-                    if (!(func && hasKind(func.body, 199 /* Block */))) {
-                        return undefined;
+                    else {
+                        var exportSymbol = symbol.exportSymbol;
+                        ts.Debug.assert(!!exportSymbol);
+                        return exportInfo(exportSymbol, getExportKindForDeclaration(parent));
                     }
-                    var keywords = [];
-                    ts.forEachReturnStatement(func.body, function (returnStatement) {
-                        pushKeywordIf(keywords, returnStatement.getFirstToken(), 94 /* ReturnKeyword */);
-                    });
-                    // Include 'throw' statements that do not occur within a try block.
-                    ts.forEach(aggregateOwnedThrowStatements(func.body), function (throwStatement) {
-                        pushKeywordIf(keywords, throwStatement.getFirstToken(), 98 /* ThrowKeyword */);
-                    });
-                    return ts.map(keywords, getHighlightSpanForNode);
-                }
-                function getIfElseOccurrences(ifStatement) {
-                    var keywords = [];
-                    // Traverse upwards through all parent if-statements linked by their else-branches.
-                    while (hasKind(ifStatement.parent, 203 /* IfStatement */) && ifStatement.parent.elseStatement === ifStatement) {
-                        ifStatement = ifStatement.parent;
-                    }
-                    // Now traverse back down through the else branches, aggregating if/else keywords of if-statements.
-                    while (ifStatement) {
-                        var children = ifStatement.getChildren();
-                        pushKeywordIf(keywords, children[0], 88 /* IfKeyword */);
-                        // Generally the 'else' keyword is second-to-last, so we traverse backwards.
-                        for (var i = children.length - 1; i >= 0; i--) {
-                            if (pushKeywordIf(keywords, children[i], 80 /* ElseKeyword */)) {
-                                break;
+                }
+                else {
+                    var exportNode = getExportNode(parent);
+                    if (exportNode && ts.hasModifier(exportNode, 1 /* Export */)) {
+                        if (ts.isImportEqualsDeclaration(exportNode) && exportNode.moduleReference === node) {
+                            // We're at `Y` in `export import X = Y`. This is not the exported symbol, the left-hand-side is. So treat this as an import statement.
+                            if (comingFromExport) {
+                                return undefined;
                             }
+                            var lhsSymbol = checker.getSymbolAtLocation(exportNode.name);
+                            return { kind: 0 /* Import */, symbol: lhsSymbol, isNamedImport: false };
                         }
-                        if (!hasKind(ifStatement.elseStatement, 203 /* IfStatement */)) {
-                            break;
+                        else {
+                            return exportInfo(symbol, getExportKindForDeclaration(exportNode));
                         }
-                        ifStatement = ifStatement.elseStatement;
                     }
-                    var result = [];
-                    // We'd like to highlight else/ifs together if they are only separated by whitespace
-                    // (i.e. the keywords are separated by no comments, no newlines).
-                    for (var i = 0; i < keywords.length; i++) {
-                        if (keywords[i].kind === 80 /* ElseKeyword */ && i < keywords.length - 1) {
-                            var elseKeyword = keywords[i];
-                            var ifKeyword = keywords[i + 1]; // this *should* always be an 'if' keyword.
-                            var shouldCombindElseAndIf = true;
-                            // Avoid recalculating getStart() by iterating backwards.
-                            for (var j = ifKeyword.getStart() - 1; j >= elseKeyword.end; j--) {
-                                if (!ts.isWhiteSpaceSingleLine(sourceFile.text.charCodeAt(j))) {
-                                    shouldCombindElseAndIf = false;
-                                    break;
-                                }
-                            }
-                            if (shouldCombindElseAndIf) {
-                                result.push({
-                                    fileName: fileName,
-                                    textSpan: ts.createTextSpanFromBounds(elseKeyword.getStart(), ifKeyword.end),
-                                    kind: ts.HighlightSpanKind.reference
-                                });
-                                i++; // skip the next keyword
-                                continue;
-                            }
-                        }
-                        // Ordinary case: just highlight the keyword.
-                        result.push(getHighlightSpanForNode(keywords[i]));
+                    else if (ts.isExportAssignment(parent)) {
+                        return getExportAssignmentExport(parent);
                     }
-                    return result;
+                    else if (ts.isExportAssignment(parent.parent)) {
+                        return getExportAssignmentExport(parent.parent);
+                    }
+                    else if (ts.isBinaryExpression(parent)) {
+                        return getSpecialPropertyExport(parent, /*useLhsSymbol*/ true);
+                    }
+                    else if (ts.isBinaryExpression(parent.parent)) {
+                        return getSpecialPropertyExport(parent.parent, /*useLhsSymbol*/ true);
+                    }
+                }
+                function getExportAssignmentExport(ex) {
+                    // Get the symbol for the `export =` node; its parent is the module it's the export of.
+                    var exportingModuleSymbol = ex.symbol.parent;
+                    ts.Debug.assert(!!exportingModuleSymbol);
+                    return { kind: 1 /* Export */, symbol: symbol, exportInfo: { exportingModuleSymbol: exportingModuleSymbol, exportKind: 2 /* ExportEquals */ } };
+                }
+                function getSpecialPropertyExport(node, useLhsSymbol) {
+                    var kind;
+                    switch (ts.getSpecialPropertyAssignmentKind(node)) {
+                        case 1 /* ExportsProperty */:
+                            kind = 0 /* Named */;
+                            break;
+                        case 2 /* ModuleExports */:
+                            kind = 2 /* ExportEquals */;
+                            break;
+                        default:
+                            return undefined;
+                    }
+                    var sym = useLhsSymbol ? checker.getSymbolAtLocation(node.left.name) : symbol;
+                    return sym && exportInfo(sym, kind);
+                }
+            }
+            function getImport() {
+                var isImport = isNodeImport(node);
+                if (!isImport)
+                    return undefined;
+                // A symbol being imported is always an alias. So get what that aliases to find the local symbol.
+                var importedSymbol = checker.getImmediateAliasedSymbol(symbol);
+                if (!importedSymbol)
+                    return undefined;
+                // Search on the local symbol in the exporting module, not the exported symbol.
+                importedSymbol = skipExportSpecifierSymbol(importedSymbol, checker);
+                // Similarly, skip past the symbol for 'export ='
+                if (importedSymbol.name === "export=") {
+                    importedSymbol = getExportEqualsLocalSymbol(importedSymbol, checker);
+                }
+                if (symbolName(importedSymbol) === symbol.name) {
+                    return __assign({ kind: 0 /* Import */, symbol: importedSymbol }, isImport);
                 }
             }
+            function exportInfo(symbol, kind) {
+                var exportInfo = getExportInfo(symbol, kind, checker);
+                return exportInfo && { kind: 1 /* Export */, symbol: symbol, exportInfo: exportInfo };
+            }
+            // Not meant for use with export specifiers or export assignment.
+            function getExportKindForDeclaration(node) {
+                return ts.hasModifier(node, 512 /* Default */) ? 1 /* Default */ : 0 /* Named */;
+            }
         }
-        DocumentHighlights.getDocumentHighlights = getDocumentHighlights;
-        /**
-         * Whether or not a 'node' is preceded by a label of the given string.
-         * Note: 'node' cannot be a SourceFile.
-         */
-        function isLabeledBy(node, labelName) {
-            for (var owner = node.parent; owner.kind === 214 /* LabeledStatement */; owner = owner.parent) {
-                if (owner.label.text === labelName) {
-                    return true;
+        FindAllReferences.getImportOrExportSymbol = getImportOrExportSymbol;
+        function getExportEqualsLocalSymbol(importedSymbol, checker) {
+            if (importedSymbol.flags & 8388608 /* Alias */) {
+                return checker.getImmediateAliasedSymbol(importedSymbol);
+            }
+            var decl = importedSymbol.valueDeclaration;
+            if (ts.isExportAssignment(decl)) {
+                return decl.expression.symbol;
+            }
+            else if (ts.isBinaryExpression(decl)) {
+                return decl.right.symbol;
+            }
+            ts.Debug.fail();
+        }
+        // If a reference is a class expression, the exported node would be its parent.
+        // If a reference is a variable declaration, the exported node would be the variable statement.
+        function getExportNode(parent) {
+            if (parent.kind === 226 /* VariableDeclaration */) {
+                var p = parent;
+                return p.parent.kind === 260 /* CatchClause */ ? undefined : p.parent.parent.kind === 208 /* VariableStatement */ ? p.parent.parent : undefined;
+            }
+            else {
+                return parent;
+            }
+        }
+        function isNodeImport(node) {
+            var parent = node.parent;
+            switch (parent.kind) {
+                case 237 /* ImportEqualsDeclaration */:
+                    return parent.name === node && isExternalModuleImportEquals(parent)
+                        ? { isNamedImport: false }
+                        : undefined;
+                case 242 /* ImportSpecifier */:
+                    // For a rename import `{ foo as bar }`, don't search for the imported symbol. Just find local uses of `bar`.
+                    return parent.propertyName ? undefined : { isNamedImport: true };
+                case 239 /* ImportClause */:
+                case 240 /* NamespaceImport */:
+                    ts.Debug.assert(parent.name === node);
+                    return { isNamedImport: false };
+                default:
+                    return undefined;
+            }
+        }
+        function getExportInfo(exportSymbol, exportKind, checker) {
+            var exportingModuleSymbol = checker.getMergedSymbol(exportSymbol.parent); // Need to get merged symbol in case there's an augmentation.
+            // `export` may appear in a namespace. In that case, just rely on global search.
+            return ts.isExternalModuleSymbol(exportingModuleSymbol) ? { exportingModuleSymbol: exportingModuleSymbol, exportKind: exportKind } : undefined;
+        }
+        FindAllReferences.getExportInfo = getExportInfo;
+        function symbolName(symbol) {
+            if (symbol.name !== "default") {
+                return symbol.name;
+            }
+            return ts.forEach(symbol.declarations, function (decl) {
+                if (ts.isExportAssignment(decl)) {
+                    return ts.isIdentifier(decl.expression) ? decl.expression.text : undefined;
+                }
+                var name = ts.getNameOfDeclaration(decl);
+                return name && name.kind === 71 /* Identifier */ && name.text;
+            });
+        }
+        /** If at an export specifier, go to the symbol it refers to. */
+        function skipExportSpecifierSymbol(symbol, checker) {
+            // For `export { foo } from './bar", there's nothing to skip, because it does  not create a new alias. But `export { foo } does.
+            if (symbol.declarations) {
+                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                    var declaration = _a[_i];
+                    if (ts.isExportSpecifier(declaration) && !declaration.propertyName && !declaration.parent.parent.moduleSpecifier) {
+                        return checker.getExportSpecifierLocalTargetSymbol(declaration);
+                    }
                 }
             }
-            return false;
+            return symbol;
         }
-    })(DocumentHighlights = ts.DocumentHighlights || (ts.DocumentHighlights = {}));
+        function getContainingModuleSymbol(importer, checker) {
+            return checker.getMergedSymbol(getSourceFileLikeForImportDeclaration(importer).symbol);
+        }
+        function getSourceFileLikeForImportDeclaration(node) {
+            if (node.kind === 181 /* CallExpression */) {
+                return node.getSourceFile();
+            }
+            var parent = node.parent;
+            if (parent.kind === 265 /* SourceFile */) {
+                return parent;
+            }
+            ts.Debug.assert(parent.kind === 234 /* ModuleBlock */ && isAmbientModuleDeclaration(parent.parent));
+            return parent.parent;
+        }
+        function isAmbientModuleDeclaration(node) {
+            return node.kind === 233 /* ModuleDeclaration */ && node.name.kind === 9 /* StringLiteral */;
+        }
+        function isExternalModuleImportEquals(_a) {
+            var moduleReference = _a.moduleReference;
+            return moduleReference.kind === 248 /* ExternalModuleReference */ && moduleReference.expression.kind === 9 /* StringLiteral */;
+        }
+    })(FindAllReferences = ts.FindAllReferences || (ts.FindAllReferences = {}));
 })(ts || (ts = {}));
+/// <reference path="./importTracker.ts" />
+/* @internal */
 var ts;
 (function (ts) {
-    function createDocumentRegistry(useCaseSensitiveFileNames, currentDirectory) {
-        if (currentDirectory === void 0) { currentDirectory = ""; }
-        // Maps from compiler setting target (ES3, ES5, etc.) to all the cached documents we have
-        // for those settings.
-        var buckets = ts.createMap();
-        var getCanonicalFileName = ts.createGetCanonicalFileName(!!useCaseSensitiveFileNames);
-        function getKeyForCompilationSettings(settings) {
-            return "_" + settings.target + "|" + settings.module + "|" + settings.noResolve + "|" + settings.jsx + "|" + settings.allowJs + "|" + settings.baseUrl + "|" + JSON.stringify(settings.typeRoots) + "|" + JSON.stringify(settings.rootDirs) + "|" + JSON.stringify(settings.paths);
+    var FindAllReferences;
+    (function (FindAllReferences) {
+        function nodeEntry(node, isInString) {
+            return { type: "node", node: node, isInString: isInString };
         }
-        function getBucketForCompilationSettings(key, createIfMissing) {
-            var bucket = buckets[key];
-            if (!bucket && createIfMissing) {
-                buckets[key] = bucket = ts.createFileMap();
+        FindAllReferences.nodeEntry = nodeEntry;
+        function findReferencedSymbols(program, cancellationToken, sourceFiles, sourceFile, position) {
+            var referencedSymbols = findAllReferencedSymbols(program, cancellationToken, sourceFiles, sourceFile, position);
+            if (!referencedSymbols || !referencedSymbols.length) {
+                return undefined;
             }
-            return bucket;
+            var out = [];
+            var checker = program.getTypeChecker();
+            for (var _i = 0, referencedSymbols_1 = referencedSymbols; _i < referencedSymbols_1.length; _i++) {
+                var _a = referencedSymbols_1[_i], definition = _a.definition, references = _a.references;
+                // Only include referenced symbols that have a valid definition.
+                if (definition) {
+                    out.push({ definition: definitionToReferencedSymbolDefinitionInfo(definition, checker), references: references.map(toReferenceEntry) });
+                }
+            }
+            return out;
         }
-        function reportStats() {
-            var bucketInfoArray = Object.keys(buckets).filter(function (name) { return name && name.charAt(0) === "_"; }).map(function (name) {
-                var entries = buckets[name];
-                var sourceFiles = [];
-                entries.forEachValue(function (key, entry) {
-                    sourceFiles.push({
-                        name: key,
-                        refCount: entry.languageServiceRefCount,
-                        references: entry.owners.slice(0)
-                    });
-                });
-                sourceFiles.sort(function (x, y) { return y.refCount - x.refCount; });
-                return {
-                    bucket: name,
-                    sourceFiles: sourceFiles
-                };
-            });
-            return JSON.stringify(bucketInfoArray, undefined, 2);
+        FindAllReferences.findReferencedSymbols = findReferencedSymbols;
+        function getImplementationsAtPosition(program, cancellationToken, sourceFiles, sourceFile, position) {
+            // A node in a JSDoc comment can't have an implementation anyway.
+            var node = ts.getTouchingPropertyName(sourceFile, position, /*includeJsDocComment*/ false);
+            var referenceEntries = getImplementationReferenceEntries(program, cancellationToken, sourceFiles, node);
+            var checker = program.getTypeChecker();
+            return ts.map(referenceEntries, function (entry) { return toImplementationLocation(entry, checker); });
+        }
+        FindAllReferences.getImplementationsAtPosition = getImplementationsAtPosition;
+        function getImplementationReferenceEntries(program, cancellationToken, sourceFiles, node) {
+            if (node.kind === 265 /* SourceFile */) {
+                return undefined;
+            }
+            var checker = program.getTypeChecker();
+            // If invoked directly on a shorthand property assignment, then return
+            // the declaration of the symbol being assigned (not the symbol being assigned to).
+            if (node.parent.kind === 262 /* ShorthandPropertyAssignment */) {
+                var result_5 = [];
+                FindAllReferences.Core.getReferenceEntriesForShorthandPropertyAssignment(node, checker, function (node) { return result_5.push(nodeEntry(node)); });
+                return result_5;
+            }
+            else if (node.kind === 97 /* SuperKeyword */ || ts.isSuperProperty(node.parent)) {
+                // References to and accesses on the super keyword only have one possible implementation, so no
+                // need to "Find all References"
+                var symbol = checker.getSymbolAtLocation(node);
+                return symbol.valueDeclaration && [nodeEntry(symbol.valueDeclaration)];
+            }
+            else {
+                // Perform "Find all References" and retrieve only those that are implementations
+                return getReferenceEntriesForNode(node, program, sourceFiles, cancellationToken, { implementations: true });
+            }
         }
-        function acquireDocument(fileName, compilationSettings, scriptSnapshot, version, scriptKind) {
-            var path = ts.toPath(fileName, currentDirectory, getCanonicalFileName);
-            var key = getKeyForCompilationSettings(compilationSettings);
-            return acquireDocumentWithKey(fileName, path, compilationSettings, key, scriptSnapshot, version, scriptKind);
+        function findReferencedEntries(program, cancellationToken, sourceFiles, sourceFile, position, options) {
+            var x = flattenEntries(findAllReferencedSymbols(program, cancellationToken, sourceFiles, sourceFile, position, options));
+            return ts.map(x, toReferenceEntry);
         }
-        function acquireDocumentWithKey(fileName, path, compilationSettings, key, scriptSnapshot, version, scriptKind) {
-            return acquireOrUpdateDocument(fileName, path, compilationSettings, key, scriptSnapshot, version, /*acquiring*/ true, scriptKind);
+        FindAllReferences.findReferencedEntries = findReferencedEntries;
+        function getReferenceEntriesForNode(node, program, sourceFiles, cancellationToken, options) {
+            if (options === void 0) { options = {}; }
+            return flattenEntries(FindAllReferences.Core.getReferencedSymbolsForNode(node, program, sourceFiles, cancellationToken, options));
         }
-        function updateDocument(fileName, compilationSettings, scriptSnapshot, version, scriptKind) {
-            var path = ts.toPath(fileName, currentDirectory, getCanonicalFileName);
-            var key = getKeyForCompilationSettings(compilationSettings);
-            return updateDocumentWithKey(fileName, path, compilationSettings, key, scriptSnapshot, version, scriptKind);
+        FindAllReferences.getReferenceEntriesForNode = getReferenceEntriesForNode;
+        function findAllReferencedSymbols(program, cancellationToken, sourceFiles, sourceFile, position, options) {
+            var node = ts.getTouchingPropertyName(sourceFile, position, /*includeJsDocComment*/ true);
+            return FindAllReferences.Core.getReferencedSymbolsForNode(node, program, sourceFiles, cancellationToken, options);
+        }
+        function flattenEntries(referenceSymbols) {
+            return referenceSymbols && ts.flatMap(referenceSymbols, function (r) { return r.references; });
+        }
+        function definitionToReferencedSymbolDefinitionInfo(def, checker) {
+            var info = (function () {
+                switch (def.type) {
+                    case "symbol": {
+                        var symbol = def.symbol, node_2 = def.node;
+                        var _a = getDefinitionKindAndDisplayParts(symbol, node_2, checker), displayParts_1 = _a.displayParts, kind_1 = _a.kind;
+                        var name_65 = displayParts_1.map(function (p) { return p.text; }).join("");
+                        return { node: node_2, name: name_65, kind: kind_1, displayParts: displayParts_1 };
+                    }
+                    case "label": {
+                        var node_3 = def.node;
+                        return { node: node_3, name: node_3.text, kind: "label" /* label */, displayParts: [ts.displayPart(node_3.text, ts.SymbolDisplayPartKind.text)] };
+                    }
+                    case "keyword": {
+                        var node_4 = def.node;
+                        var name_66 = ts.tokenToString(node_4.kind);
+                        return { node: node_4, name: name_66, kind: "keyword" /* keyword */, displayParts: [{ text: name_66, kind: "keyword" /* keyword */ }] };
+                    }
+                    case "this": {
+                        var node_5 = def.node;
+                        var symbol = checker.getSymbolAtLocation(node_5);
+                        var displayParts_2 = symbol && ts.SymbolDisplay.getSymbolDisplayPartsDocumentationAndSymbolKind(checker, symbol, node_5.getSourceFile(), ts.getContainerNode(node_5), node_5).displayParts;
+                        return { node: node_5, name: "this", kind: "var" /* variableElement */, displayParts: displayParts_2 };
+                    }
+                    case "string": {
+                        var node_6 = def.node;
+                        return { node: node_6, name: node_6.text, kind: "var" /* variableElement */, displayParts: [ts.displayPart(ts.getTextOfNode(node_6), ts.SymbolDisplayPartKind.stringLiteral)] };
+                    }
+                }
+            })();
+            if (!info) {
+                return undefined;
+            }
+            var node = info.node, name = info.name, kind = info.kind, displayParts = info.displayParts;
+            var sourceFile = node.getSourceFile();
+            return {
+                containerKind: "" /* unknown */,
+                containerName: "",
+                fileName: sourceFile.fileName,
+                kind: kind,
+                name: name,
+                textSpan: ts.createTextSpanFromNode(node, sourceFile),
+                displayParts: displayParts
+            };
         }
-        function updateDocumentWithKey(fileName, path, compilationSettings, key, scriptSnapshot, version, scriptKind) {
-            return acquireOrUpdateDocument(fileName, path, compilationSettings, key, scriptSnapshot, version, /*acquiring*/ false, scriptKind);
+        function getDefinitionKindAndDisplayParts(symbol, node, checker) {
+            var _a = ts.SymbolDisplay.getSymbolDisplayPartsDocumentationAndSymbolKind(checker, symbol, node.getSourceFile(), ts.getContainerNode(node), node), displayParts = _a.displayParts, symbolKind = _a.symbolKind;
+            return { displayParts: displayParts, kind: symbolKind };
         }
-        function acquireOrUpdateDocument(fileName, path, compilationSettings, key, scriptSnapshot, version, acquiring, scriptKind) {
-            var bucket = getBucketForCompilationSettings(key, /*createIfMissing*/ true);
-            var entry = bucket.get(path);
-            if (!entry) {
-                ts.Debug.assert(acquiring, "How could we be trying to update a document that the registry doesn't have?");
-                // Have never seen this file with these settings.  Create a new source file for it.
-                var sourceFile = ts.createLanguageServiceSourceFile(fileName, scriptSnapshot, compilationSettings.target, version, /*setNodeParents*/ false, scriptKind);
-                entry = {
-                    sourceFile: sourceFile,
-                    languageServiceRefCount: 0,
-                    owners: []
+        function toReferenceEntry(entry) {
+            if (entry.type === "span") {
+                return { textSpan: entry.textSpan, fileName: entry.fileName, isWriteAccess: false, isDefinition: false };
+            }
+            var node = entry.node, isInString = entry.isInString;
+            return {
+                fileName: node.getSourceFile().fileName,
+                textSpan: getTextSpan(node),
+                isWriteAccess: isWriteAccess(node),
+                isDefinition: ts.isAnyDeclarationName(node) || ts.isLiteralComputedPropertyDeclarationName(node),
+                isInString: isInString
+            };
+        }
+        function toImplementationLocation(entry, checker) {
+            if (entry.type === "node") {
+                var node = entry.node;
+                return __assign({ textSpan: getTextSpan(node), fileName: node.getSourceFile().fileName }, implementationKindDisplayParts(node, checker));
+            }
+            else {
+                var textSpan = entry.textSpan, fileName = entry.fileName;
+                return { textSpan: textSpan, fileName: fileName, kind: "" /* unknown */, displayParts: [] };
+            }
+        }
+        function implementationKindDisplayParts(node, checker) {
+            var symbol = checker.getSymbolAtLocation(ts.isDeclaration(node) && node.name ? node.name : node);
+            if (symbol) {
+                return getDefinitionKindAndDisplayParts(symbol, node, checker);
+            }
+            else if (node.kind === 178 /* ObjectLiteralExpression */) {
+                return {
+                    kind: "interface" /* interfaceElement */,
+                    displayParts: [ts.punctuationPart(19 /* OpenParenToken */), ts.textPart("object literal"), ts.punctuationPart(20 /* CloseParenToken */)]
+                };
+            }
+            else if (node.kind === 199 /* ClassExpression */) {
+                return {
+                    kind: "local class" /* localClassElement */,
+                    displayParts: [ts.punctuationPart(19 /* OpenParenToken */), ts.textPart("anonymous local class"), ts.punctuationPart(20 /* CloseParenToken */)]
                 };
-                bucket.set(path, entry);
             }
             else {
-                // We have an entry for this file.  However, it may be for a different version of
-                // the script snapshot.  If so, update it appropriately.  Otherwise, we can just
-                // return it as is.
-                if (entry.sourceFile.version !== version) {
-                    entry.sourceFile = ts.updateLanguageServiceSourceFile(entry.sourceFile, scriptSnapshot, version, scriptSnapshot.getChangeRange(entry.sourceFile.scriptSnapshot));
-                }
+                return { kind: ts.getNodeKind(node), displayParts: [] };
             }
-            // If we're acquiring, then this is the first time this LS is asking for this document.
-            // Increase our ref count so we know there's another LS using the document.  If we're
-            // not acquiring, then that means the LS is 'updating' the file instead, and that means
-            // it has already acquired the document previously.  As such, we do not need to increase
-            // the ref count.
-            if (acquiring) {
-                entry.languageServiceRefCount++;
+        }
+        function toHighlightSpan(entry) {
+            if (entry.type === "span") {
+                var fileName_1 = entry.fileName, textSpan = entry.textSpan;
+                return { fileName: fileName_1, span: { textSpan: textSpan, kind: "reference" /* reference */ } };
             }
-            return entry.sourceFile;
+            var node = entry.node, isInString = entry.isInString;
+            var fileName = entry.node.getSourceFile().fileName;
+            var writeAccess = isWriteAccess(node);
+            var span = {
+                textSpan: getTextSpan(node),
+                kind: writeAccess ? "writtenReference" /* writtenReference */ : "reference" /* reference */,
+                isInString: isInString
+            };
+            return { fileName: fileName, span: span };
         }
-        function releaseDocument(fileName, compilationSettings) {
-            var path = ts.toPath(fileName, currentDirectory, getCanonicalFileName);
-            var key = getKeyForCompilationSettings(compilationSettings);
-            return releaseDocumentWithKey(path, key);
+        FindAllReferences.toHighlightSpan = toHighlightSpan;
+        function getTextSpan(node) {
+            var start = node.getStart();
+            var end = node.getEnd();
+            if (node.kind === 9 /* StringLiteral */) {
+                start += 1;
+                end -= 1;
+            }
+            return ts.createTextSpanFromBounds(start, end);
         }
-        function releaseDocumentWithKey(path, key) {
-            var bucket = getBucketForCompilationSettings(key, /*createIfMissing*/ false);
-            ts.Debug.assert(bucket !== undefined);
-            var entry = bucket.get(path);
-            entry.languageServiceRefCount--;
-            ts.Debug.assert(entry.languageServiceRefCount >= 0);
-            if (entry.languageServiceRefCount === 0) {
-                bucket.remove(path);
+        /** A node is considered a writeAccess iff it is a name of a declaration or a target of an assignment */
+        function isWriteAccess(node) {
+            if (ts.isAnyDeclarationName(node)) {
+                return true;
+            }
+            var parent = node.parent;
+            switch (parent && parent.kind) {
+                case 193 /* PostfixUnaryExpression */:
+                case 192 /* PrefixUnaryExpression */:
+                    return true;
+                case 194 /* BinaryExpression */:
+                    return parent.left === node && ts.isAssignmentOperator(parent.operatorToken.kind);
+                default:
+                    return false;
             }
         }
-        return {
-            acquireDocument: acquireDocument,
-            acquireDocumentWithKey: acquireDocumentWithKey,
-            updateDocument: updateDocument,
-            updateDocumentWithKey: updateDocumentWithKey,
-            releaseDocument: releaseDocument,
-            releaseDocumentWithKey: releaseDocumentWithKey,
-            reportStats: reportStats,
-            getKeyForCompilationSettings: getKeyForCompilationSettings
-        };
-    }
-    ts.createDocumentRegistry = createDocumentRegistry;
+    })(FindAllReferences = ts.FindAllReferences || (ts.FindAllReferences = {}));
 })(ts || (ts = {}));
+/** Encapsulates the core find-all-references algorithm. */
 /* @internal */
-var ts;
 (function (ts) {
     var FindAllReferences;
     (function (FindAllReferences) {
-        function findReferencedSymbols(typeChecker, cancellationToken, sourceFiles, sourceFile, position, findInStrings, findInComments) {
-            var node = ts.getTouchingPropertyName(sourceFile, position, /*includeJsDocComment*/ true);
-            if (node === sourceFile) {
-                return undefined;
+        var Core;
+        (function (Core) {
+            /** Core find-all-references algorithm. Handles special cases before delegating to `getReferencedSymbolsForSymbol`. */
+            function getReferencedSymbolsForNode(node, program, sourceFiles, cancellationToken, options) {
+                if (options === void 0) { options = {}; }
+                if (node.kind === 265 /* SourceFile */) {
+                    return undefined;
+                }
+                if (!options.implementations) {
+                    var special = getReferencedSymbolsSpecial(node, sourceFiles, cancellationToken);
+                    if (special) {
+                        return special;
+                    }
+                }
+                var checker = program.getTypeChecker();
+                var symbol = checker.getSymbolAtLocation(node);
+                // Could not find a symbol e.g. unknown identifier
+                if (!symbol) {
+                    // String literal might be a property (and thus have a symbol), so do this here rather than in getReferencedSymbolsSpecial.
+                    if (!options.implementations && node.kind === 9 /* StringLiteral */) {
+                        return getReferencesForStringLiteral(node, sourceFiles, cancellationToken);
+                    }
+                    // Can't have references to something that we have no symbol for.
+                    return undefined;
+                }
+                if (symbol.flags & 1536 /* Module */ && isModuleReferenceLocation(node)) {
+                    return getReferencedSymbolsForModule(program, symbol, sourceFiles);
+                }
+                return getReferencedSymbolsForSymbol(symbol, node, sourceFiles, checker, cancellationToken, options);
             }
-            switch (node.kind) {
-                case 8 /* NumericLiteral */:
-                    if (!ts.isLiteralNameOfPropertyDeclarationOrIndexAccess(node)) {
-                        break;
+            Core.getReferencedSymbolsForNode = getReferencedSymbolsForNode;
+            function isModuleReferenceLocation(node) {
+                if (node.kind !== 9 /* StringLiteral */) {
+                    return false;
+                }
+                switch (node.parent.kind) {
+                    case 233 /* ModuleDeclaration */:
+                    case 248 /* ExternalModuleReference */:
+                    case 238 /* ImportDeclaration */:
+                    case 244 /* ExportDeclaration */:
+                        return true;
+                    case 181 /* CallExpression */:
+                        return ts.isRequireCall(node.parent, /*checkArgumentIsStringLiteral*/ false) || ts.isImportCall(node.parent);
+                    default:
+                        return false;
+                }
+            }
+            function getReferencedSymbolsForModule(program, symbol, sourceFiles) {
+                ts.Debug.assert(!!symbol.valueDeclaration);
+                var references = FindAllReferences.findModuleReferences(program, sourceFiles, symbol).map(function (reference) {
+                    if (reference.kind === "import") {
+                        return { type: "node", node: reference.literal };
                     }
-                // Fallthrough
-                case 69 /* Identifier */:
-                case 97 /* ThisKeyword */:
-                // case SyntaxKind.SuperKeyword: TODO:GH#9268
-                case 121 /* ConstructorKeyword */:
-                case 9 /* StringLiteral */:
-                    return getReferencedSymbolsForNode(typeChecker, cancellationToken, node, sourceFiles, findInStrings, findInComments, /*implementations*/ false);
+                    else {
+                        return {
+                            type: "span",
+                            fileName: reference.referencingFile.fileName,
+                            textSpan: ts.createTextSpanFromRange(reference.ref),
+                        };
+                    }
+                });
+                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                    var decl = _a[_i];
+                    switch (decl.kind) {
+                        case 265 /* SourceFile */:
+                            // Don't include the source file itself. (This may not be ideal behavior, but awkward to include an entire file as a reference.)
+                            break;
+                        case 233 /* ModuleDeclaration */:
+                            references.push({ type: "node", node: decl.name });
+                            break;
+                        default:
+                            ts.Debug.fail("Expected a module symbol to be declared by a SourceFile or ModuleDeclaration.");
+                    }
+                }
+                return [{
+                        definition: { type: "symbol", symbol: symbol, node: symbol.valueDeclaration },
+                        references: references
+                    }];
             }
-            return undefined;
-        }
-        FindAllReferences.findReferencedSymbols = findReferencedSymbols;
-        function getReferencedSymbolsForNode(typeChecker, cancellationToken, node, sourceFiles, findInStrings, findInComments, implementations) {
-            if (!implementations) {
+            /** getReferencedSymbols for special node kinds. */
+            function getReferencedSymbolsSpecial(node, sourceFiles, cancellationToken) {
+                if (ts.isTypeKeyword(node.kind)) {
+                    return getAllReferencesForKeyword(sourceFiles, node.kind, cancellationToken);
+                }
                 // Labels
                 if (ts.isLabelName(node)) {
                     if (ts.isJumpStatementTarget(node)) {
                         var labelDefinition = ts.getTargetLabel(node.parent, node.text);
                         // if we have a label definition, look within its statement for references, if not, then
                         // the label is undefined and we have no results..
-                        return labelDefinition ? getLabelReferencesInNode(labelDefinition.parent, labelDefinition) : undefined;
+                        return labelDefinition && getLabelReferencesInNode(labelDefinition.parent, labelDefinition);
                     }
                     else {
                         // it is a label definition and not a target, search within the parent labeledStatement
@@ -65605,129 +79187,205 @@ var ts;
                     }
                 }
                 if (ts.isThis(node)) {
-                    return getReferencesForThisKeyword(node, sourceFiles);
+                    return getReferencesForThisKeyword(node, sourceFiles, cancellationToken);
                 }
-                if (node.kind === 95 /* SuperKeyword */) {
+                if (node.kind === 97 /* SuperKeyword */) {
                     return getReferencesForSuperKeyword(node);
                 }
-            }
-            // `getSymbolAtLocation` normally returns the symbol of the class when given the constructor keyword,
-            // so we have to specify that we want the constructor symbol.
-            var symbol = typeChecker.getSymbolAtLocation(node);
-            if (!implementations && !symbol && node.kind === 9 /* StringLiteral */) {
-                return getReferencesForStringLiteral(node, sourceFiles);
-            }
-            // Could not find a symbol e.g. unknown identifier
-            if (!symbol) {
-                // Can't have references to something that we have no symbol for.
-                return undefined;
-            }
-            var declarations = symbol.declarations;
-            // The symbol was an internal symbol and does not have a declaration e.g. undefined symbol
-            if (!declarations || !declarations.length) {
                 return undefined;
             }
-            var result;
-            // Compute the meaning from the location and the symbol it references
-            var searchMeaning = getIntersectingMeaningFromDeclarations(ts.getMeaningFromLocation(node), declarations);
-            // Get the text to search for.
-            // Note: if this is an external module symbol, the name doesn't include quotes.
-            var declaredName = ts.stripQuotes(ts.getDeclaredName(typeChecker, symbol, node));
-            // Try to get the smallest valid scope that we can limit our search to;
-            // otherwise we'll need to search globally (i.e. include each file).
-            var scope = getSymbolScope(symbol);
-            // Maps from a symbol ID to the ReferencedSymbol entry in 'result'.
-            var symbolToIndex = [];
-            if (scope) {
-                result = [];
-                getReferencesInNode(scope, symbol, declaredName, node, searchMeaning, findInStrings, findInComments, result, symbolToIndex);
-            }
-            else {
-                var internedName = getInternedName(symbol, node, declarations);
-                for (var _i = 0, sourceFiles_8 = sourceFiles; _i < sourceFiles_8.length; _i++) {
-                    var sourceFile = sourceFiles_8[_i];
-                    cancellationToken.throwIfCancellationRequested();
-                    var nameTable = ts.getNameTable(sourceFile);
-                    if (nameTable[internedName] !== undefined) {
-                        result = result || [];
-                        getReferencesInNode(sourceFile, symbol, declaredName, node, searchMeaning, findInStrings, findInComments, result, symbolToIndex);
+            /** Core find-all-references algorithm for a normal symbol. */
+            function getReferencedSymbolsForSymbol(symbol, node, sourceFiles, checker, cancellationToken, options) {
+                symbol = skipPastExportOrImportSpecifier(symbol, node, checker);
+                // Compute the meaning from the location and the symbol it references
+                var searchMeaning = getIntersectingMeaningFromDeclarations(ts.getMeaningFromLocation(node), symbol.declarations);
+                var result = [];
+                var state = new State(sourceFiles, /*isForConstructor*/ node.kind === 123 /* ConstructorKeyword */, checker, cancellationToken, searchMeaning, options, result);
+                var search = state.createSearch(node, symbol, /*comingFrom*/ undefined, { allSearchSymbols: populateSearchSymbolSet(symbol, node, checker, options.implementations) });
+                // Try to get the smallest valid scope that we can limit our search to;
+                // otherwise we'll need to search globally (i.e. include each file).
+                var scope = getSymbolScope(symbol);
+                if (scope) {
+                    getReferencesInContainer(scope, scope.getSourceFile(), search, state);
+                }
+                else {
+                    // Global search
+                    for (var _i = 0, _a = state.sourceFiles; _i < _a.length; _i++) {
+                        var sourceFile = _a[_i];
+                        state.cancellationToken.throwIfCancellationRequested();
+                        searchForName(sourceFile, search, state);
                     }
                 }
+                return result;
             }
-            return result;
-            function getDefinition(symbol) {
-                var info = ts.SymbolDisplay.getSymbolDisplayPartsDocumentationAndSymbolKind(typeChecker, symbol, node.getSourceFile(), ts.getContainerNode(node), node);
-                var name = ts.map(info.displayParts, function (p) { return p.text; }).join("");
-                var declarations = symbol.declarations;
-                if (!declarations || declarations.length === 0) {
-                    return undefined;
+            /** Handle a few special cases relating to export/import specifiers. */
+            function skipPastExportOrImportSpecifier(symbol, node, checker) {
+                var parent = node.parent;
+                if (ts.isExportSpecifier(parent)) {
+                    return getLocalSymbolForExportSpecifier(node, symbol, parent, checker);
                 }
-                return {
-                    containerKind: "",
-                    containerName: "",
-                    name: name,
-                    kind: info.symbolKind,
-                    fileName: declarations[0].getSourceFile().fileName,
-                    textSpan: ts.createTextSpan(declarations[0].getStart(), 0),
-                    displayParts: info.displayParts
-                };
+                if (ts.isImportSpecifier(parent) && parent.propertyName === node) {
+                    // We're at `foo` in `import { foo as bar }`. Probably intended to find all refs on the original, not just on the import.
+                    return checker.getImmediateAliasedSymbol(symbol);
+                }
+                return symbol;
             }
-            function getAliasSymbolForPropertyNameSymbol(symbol, location) {
-                if (symbol.flags & 8388608 /* Alias */) {
-                    // Default import get alias
-                    var defaultImport = ts.getDeclarationOfKind(symbol, 231 /* ImportClause */);
-                    if (defaultImport) {
-                        return typeChecker.getAliasedSymbol(symbol);
-                    }
-                    var importOrExportSpecifier = ts.forEach(symbol.declarations, function (declaration) { return (declaration.kind === 234 /* ImportSpecifier */ ||
-                        declaration.kind === 238 /* ExportSpecifier */) ? declaration : undefined; });
-                    if (importOrExportSpecifier &&
-                        // export { a }
-                        (!importOrExportSpecifier.propertyName ||
-                            // export {a as class } where a is location
-                            importOrExportSpecifier.propertyName === location)) {
-                        // If Import specifier -> get alias
-                        // else Export specifier -> get local target
-                        return importOrExportSpecifier.kind === 234 /* ImportSpecifier */ ?
-                            typeChecker.getAliasedSymbol(symbol) :
-                            typeChecker.getExportSpecifierLocalTargetSymbol(importOrExportSpecifier);
+            /**
+             * Holds all state needed for the finding references.
+             * Unlike `Search`, there is only one `State`.
+             */
+            var State = (function () {
+                function State(sourceFiles, 
+                    /** True if we're searching for constructor references. */
+                    isForConstructor, checker, cancellationToken, searchMeaning, options, result) {
+                    this.sourceFiles = sourceFiles;
+                    this.isForConstructor = isForConstructor;
+                    this.checker = checker;
+                    this.cancellationToken = cancellationToken;
+                    this.searchMeaning = searchMeaning;
+                    this.options = options;
+                    this.result = result;
+                    /** Cache for `explicitlyinheritsFrom`. */
+                    this.inheritsFromCache = ts.createMap();
+                    /**
+                     * Type nodes can contain multiple references to the same type. For example:
+                     *      let x: Foo & (Foo & Bar) = ...
+                     * Because we are returning the implementation locations and not the identifier locations,
+                     * duplicate entries would be returned here as each of the type references is part of
+                     * the same implementation. For that reason, check before we add a new entry.
+                     */
+                    this.markSeenContainingTypeReference = ts.nodeSeenTracker();
+                    /**
+                     * It's possible that we will encounter the right side of `export { foo as bar } from "x";` more than once.
+                     * For example:
+                     *     // b.ts
+                     *     export { foo as bar } from "./a";
+                     *     import { bar } from "./b";
+                     *
+                     * Normally at `foo as bar` we directly add `foo` and do not locally search for it (since it doesn't declare a local).
+                     * But another reference to it may appear in the same source file.
+                     * See `tests/cases/fourslash/transitiveExportImports3.ts`.
+                     */
+                    this.markSeenReExportRHS = ts.nodeSeenTracker();
+                    this.symbolIdToReferences = [];
+                    // Source file ID → symbol ID → Whether the symbol has been searched for in the source file.
+                    this.sourceFileToSeenSymbols = [];
+                }
+                /** Gets every place to look for references of an exported symbols. See `ImportsResult` in `importTracker.ts` for more documentation. */
+                State.prototype.getImportSearches = function (exportSymbol, exportInfo) {
+                    if (!this.importTracker)
+                        this.importTracker = FindAllReferences.createImportTracker(this.sourceFiles, this.checker, this.cancellationToken);
+                    return this.importTracker(exportSymbol, exportInfo, this.options.isForRename);
+                };
+                /** @param allSearchSymbols set of additinal symbols for use by `includes`. */
+                State.prototype.createSearch = function (location, symbol, comingFrom, searchOptions) {
+                    if (searchOptions === void 0) { searchOptions = {}; }
+                    // Note: if this is an external module symbol, the name doesn't include quotes.
+                    var _a = searchOptions.text, text = _a === void 0 ? ts.stripQuotes(ts.getDeclaredName(this.checker, symbol, location)) : _a, _b = searchOptions.allSearchSymbols, allSearchSymbols = _b === void 0 ? undefined : _b;
+                    var escapedText = ts.escapeIdentifier(text);
+                    var parents = this.options.implementations && getParentSymbolsOfPropertyAccess(location, symbol, this.checker);
+                    return {
+                        location: location, symbol: symbol, comingFrom: comingFrom, text: text, escapedText: escapedText, parents: parents,
+                        includes: function (referenceSymbol) { return allSearchSymbols ? ts.contains(allSearchSymbols, referenceSymbol) : referenceSymbol === symbol; },
+                    };
+                };
+                /**
+                 * Callback to add references for a particular searched symbol.
+                 * This initializes a reference group, so only call this if you will add at least one reference.
+                 */
+                State.prototype.referenceAdder = function (searchSymbol, searchLocation) {
+                    var symbolId = ts.getSymbolId(searchSymbol);
+                    var references = this.symbolIdToReferences[symbolId];
+                    if (!references) {
+                        references = this.symbolIdToReferences[symbolId] = [];
+                        this.result.push({ definition: { type: "symbol", symbol: searchSymbol, node: searchLocation }, references: references });
+                    }
+                    return function (node) { return references.push(FindAllReferences.nodeEntry(node)); };
+                };
+                /** Add a reference with no associated definition. */
+                State.prototype.addStringOrCommentReference = function (fileName, textSpan) {
+                    this.result.push({
+                        definition: undefined,
+                        references: [{ type: "span", fileName: fileName, textSpan: textSpan }]
+                    });
+                };
+                /** Returns `true` the first time we search for a symbol in a file and `false` afterwards. */
+                State.prototype.markSearchedSymbol = function (sourceFile, symbol) {
+                    var sourceId = ts.getNodeId(sourceFile);
+                    var symbolId = ts.getSymbolId(symbol);
+                    var seenSymbols = this.sourceFileToSeenSymbols[sourceId] || (this.sourceFileToSeenSymbols[sourceId] = []);
+                    return !seenSymbols[symbolId] && (seenSymbols[symbolId] = true);
+                };
+                return State;
+            }());
+            /** Search for all imports of a given exported symbol using `State.getImportSearches`. */
+            function searchForImportsOfExport(exportLocation, exportSymbol, exportInfo, state) {
+                var _a = state.getImportSearches(exportSymbol, exportInfo), importSearches = _a.importSearches, singleReferences = _a.singleReferences, indirectUsers = _a.indirectUsers;
+                // For `import { foo as bar }` just add the reference to `foo`, and don't otherwise search in the file.
+                if (singleReferences.length) {
+                    var addRef = state.referenceAdder(exportSymbol, exportLocation);
+                    for (var _i = 0, singleReferences_1 = singleReferences; _i < singleReferences_1.length; _i++) {
+                        var singleRef = singleReferences_1[_i];
+                        addRef(singleRef);
+                    }
+                }
+                // For each import, find all references to that import in its source file.
+                for (var _b = 0, importSearches_1 = importSearches; _b < importSearches_1.length; _b++) {
+                    var _c = importSearches_1[_b], importLocation = _c[0], importSymbol = _c[1];
+                    getReferencesInSourceFile(importLocation.getSourceFile(), state.createSearch(importLocation, importSymbol, 1 /* Export */), state);
+                }
+                if (indirectUsers.length) {
+                    var indirectSearch = void 0;
+                    switch (exportInfo.exportKind) {
+                        case 0 /* Named */:
+                            indirectSearch = state.createSearch(exportLocation, exportSymbol, 1 /* Export */);
+                            break;
+                        case 1 /* Default */:
+                            // Search for a property access to '.default'. This can't be renamed.
+                            indirectSearch = state.options.isForRename ? undefined : state.createSearch(exportLocation, exportSymbol, 1 /* Export */, { text: "default" });
+                            break;
+                        case 2 /* ExportEquals */:
+                            break;
+                    }
+                    if (indirectSearch) {
+                        for (var _d = 0, indirectUsers_1 = indirectUsers; _d < indirectUsers_1.length; _d++) {
+                            var indirectUser = indirectUsers_1[_d];
+                            searchForName(indirectUser, indirectSearch, state);
+                        }
                     }
                 }
-                return undefined;
             }
-            function followAliasIfNecessary(symbol, location) {
-                return getAliasSymbolForPropertyNameSymbol(symbol, location) || symbol;
+            // Go to the symbol we imported from and find references for it.
+            function searchForImportedSymbol(symbol, state) {
+                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                    var declaration = _a[_i];
+                    getReferencesInSourceFile(declaration.getSourceFile(), state.createSearch(declaration, symbol, 0 /* Import */), state);
+                }
+            }
+            /** Search for all occurences of an identifier in a source file (and filter out the ones that match). */
+            function searchForName(sourceFile, search, state) {
+                if (ts.getNameTable(sourceFile).get(search.escapedText) !== undefined) {
+                    getReferencesInSourceFile(sourceFile, search, state);
+                }
             }
-            function getPropertySymbolOfDestructuringAssignment(location) {
+            function getPropertySymbolOfDestructuringAssignment(location, checker) {
                 return ts.isArrayLiteralOrObjectLiteralDestructuringPattern(location.parent.parent) &&
-                    typeChecker.getPropertySymbolOfDestructuringAssignment(location);
+                    checker.getPropertySymbolOfDestructuringAssignment(location);
             }
             function isObjectBindingPatternElementWithoutPropertyName(symbol) {
-                var bindingElement = ts.getDeclarationOfKind(symbol, 169 /* BindingElement */);
+                var bindingElement = ts.getDeclarationOfKind(symbol, 176 /* BindingElement */);
                 return bindingElement &&
-                    bindingElement.parent.kind === 167 /* ObjectBindingPattern */ &&
+                    bindingElement.parent.kind === 174 /* ObjectBindingPattern */ &&
                     !bindingElement.propertyName;
             }
-            function getPropertySymbolOfObjectBindingPatternWithoutPropertyName(symbol) {
+            function getPropertySymbolOfObjectBindingPatternWithoutPropertyName(symbol, checker) {
                 if (isObjectBindingPatternElementWithoutPropertyName(symbol)) {
-                    var bindingElement = ts.getDeclarationOfKind(symbol, 169 /* BindingElement */);
-                    var typeOfPattern = typeChecker.getTypeAtLocation(bindingElement.parent);
-                    return typeOfPattern && typeChecker.getPropertyOfType(typeOfPattern, bindingElement.name.text);
+                    var bindingElement = ts.getDeclarationOfKind(symbol, 176 /* BindingElement */);
+                    var typeOfPattern = checker.getTypeAtLocation(bindingElement.parent);
+                    return typeOfPattern && checker.getPropertyOfType(typeOfPattern, bindingElement.name.text);
                 }
                 return undefined;
             }
-            function getInternedName(symbol, location, declarations) {
-                // If this is an export or import specifier it could have been renamed using the 'as' syntax.
-                // If so we want to search for whatever under the cursor.
-                if (ts.isImportOrExportSpecifierName(location)) {
-                    return location.getText();
-                }
-                // Try to get the local symbol if we're dealing with an 'export default'
-                // since that symbol has the "true" name.
-                var localExportDefaultSymbol = ts.getLocalSymbolForExportDefault(symbol);
-                symbol = localExportDefaultSymbol || symbol;
-                return ts.stripQuotes(symbol.name);
-            }
             /**
              * Determines the smallest scope in which a symbol may have named references.
              * Note that not every construct has been accounted for. This function can
@@ -65739,20 +79397,20 @@ var ts;
             function getSymbolScope(symbol) {
                 // If this is the symbol of a named function expression or named class expression,
                 // then named references are limited to its own scope.
-                var valueDeclaration = symbol.valueDeclaration;
-                if (valueDeclaration && (valueDeclaration.kind === 179 /* FunctionExpression */ || valueDeclaration.kind === 192 /* ClassExpression */)) {
+                var declarations = symbol.declarations, flags = symbol.flags, parent = symbol.parent, valueDeclaration = symbol.valueDeclaration;
+                if (valueDeclaration && (valueDeclaration.kind === 186 /* FunctionExpression */ || valueDeclaration.kind === 199 /* ClassExpression */)) {
                     return valueDeclaration;
                 }
+                if (!declarations) {
+                    return undefined;
+                }
                 // If this is private property or method, the scope is the containing class
-                if (symbol.flags & (4 /* Property */ | 8192 /* Method */)) {
-                    var privateDeclaration = ts.forEach(symbol.getDeclarations(), function (d) { return (ts.getModifierFlags(d) & 8 /* Private */) ? d : undefined; });
+                if (flags & (4 /* Property */ | 8192 /* Method */)) {
+                    var privateDeclaration = ts.find(declarations, function (d) { return ts.hasModifier(d, 8 /* Private */); });
                     if (privateDeclaration) {
-                        return ts.getAncestor(privateDeclaration, 221 /* ClassDeclaration */);
+                        return ts.getAncestor(privateDeclaration, 229 /* ClassDeclaration */);
                     }
-                }
-                // If the symbol is an import we would like to find it if we are looking for what it imports.
-                // So consider it visible outside its declaration scope.
-                if (symbol.flags & 8388608 /* Alias */) {
+                    // Else this is a public property and could be accessed from anywhere.
                     return undefined;
                 }
                 // If symbol is of object binding pattern element without property name we would want to
@@ -65760,36 +79418,37 @@ var ts;
                 if (isObjectBindingPatternElementWithoutPropertyName(symbol)) {
                     return undefined;
                 }
-                // if this symbol is visible from its parent container, e.g. exported, then bail out
-                // if symbol correspond to the union property - bail out
-                if (symbol.parent || (symbol.flags & 268435456 /* SyntheticProperty */)) {
+                // If the symbol has a parent, it's globally visible.
+                // Unless that parent is an external module, then we should only search in the module (and recurse on the export later).
+                // But if the parent is a module that has `export as namespace`, then the symbol *is* globally visible.
+                if (parent && !((parent.flags & 1536 /* Module */) && ts.isExternalModuleSymbol(parent) && !parent.globalExports)) {
                     return undefined;
                 }
                 var scope;
-                var declarations = symbol.getDeclarations();
-                if (declarations) {
-                    for (var _i = 0, declarations_7 = declarations; _i < declarations_7.length; _i++) {
-                        var declaration = declarations_7[_i];
-                        var container = ts.getContainerNode(declaration);
-                        if (!container) {
-                            return undefined;
-                        }
-                        if (scope && scope !== container) {
-                            // Different declarations have different containers, bail out
-                            return undefined;
-                        }
-                        if (container.kind === 256 /* SourceFile */ && !ts.isExternalModule(container)) {
-                            // This is a global variable and not an external module, any declaration defined
-                            // within this scope is visible outside the file
-                            return undefined;
-                        }
-                        // The search scope is the container node
-                        scope = container;
+                for (var _i = 0, declarations_10 = declarations; _i < declarations_10.length; _i++) {
+                    var declaration = declarations_10[_i];
+                    var container = ts.getContainerNode(declaration);
+                    if (scope && scope !== container) {
+                        // Different declarations have different containers, bail out
+                        return undefined;
+                    }
+                    if (!container || container.kind === 265 /* SourceFile */ && !ts.isExternalOrCommonJsModule(container)) {
+                        // This is a global variable and not an external module, any declaration defined
+                        // within this scope is visible outside the file
+                        return undefined;
                     }
+                    // The search scope is the container node
+                    scope = container;
                 }
-                return scope;
+                // If symbol.parent, this means we are in an export of an external module. (Otherwise we would have returned `undefined` above.)
+                // For an export of a module, we may be in a declaration file, and it may be accessed elsewhere. E.g.:
+                //     declare module "a" { export type T = number; }
+                //     declare module "b" { import { T } from "a"; export const x: T; }
+                // So we must search the whole source file. (Because we will mark the source file as seen, we we won't return to it when searching for imports.)
+                return parent ? scope.getSourceFile() : scope;
             }
-            function getPossibleSymbolReferencePositions(sourceFile, symbolName, start, end) {
+            function getPossibleSymbolReferencePositions(sourceFile, symbolName, container) {
+                if (container === void 0) { container = sourceFile; }
                 var positions = [];
                 /// TODO: Cache symbol existence for files to save text search
                 // Also, need to make this work for unicode escapes.
@@ -65800,17 +79459,16 @@ var ts;
                 var text = sourceFile.text;
                 var sourceLength = text.length;
                 var symbolNameLength = symbolName.length;
-                var position = text.indexOf(symbolName, start);
+                var position = text.indexOf(symbolName, container.pos);
                 while (position >= 0) {
-                    cancellationToken.throwIfCancellationRequested();
                     // If we are past the end, stop looking
-                    if (position > end)
+                    if (position > container.end)
                         break;
                     // We found a match.  Make sure it's not part of a larger word (i.e. the char
                     // before and after it have to be a non-identifier char).
                     var endPosition = position + symbolNameLength;
-                    if ((position === 0 || !ts.isIdentifierPart(text.charCodeAt(position - 1), 2 /* Latest */)) &&
-                        (endPosition === sourceLength || !ts.isIdentifierPart(text.charCodeAt(endPosition), 2 /* Latest */))) {
+                    if ((position === 0 || !ts.isIdentifierPart(text.charCodeAt(position - 1), 5 /* Latest */)) &&
+                        (endPosition === sourceLength || !ts.isIdentifierPart(text.charCodeAt(endPosition), 5 /* Latest */))) {
                         // Found a real match.  Keep searching.
                         positions.push(position);
                     }
@@ -65822,280 +79480,314 @@ var ts;
                 var references = [];
                 var sourceFile = container.getSourceFile();
                 var labelName = targetLabel.text;
-                var possiblePositions = getPossibleSymbolReferencePositions(sourceFile, labelName, container.getStart(), container.getEnd());
-                ts.forEach(possiblePositions, function (position) {
-                    cancellationToken.throwIfCancellationRequested();
-                    var node = ts.getTouchingWord(sourceFile, position);
-                    if (!node || node.getWidth() !== labelName.length) {
-                        return;
-                    }
+                var possiblePositions = getPossibleSymbolReferencePositions(sourceFile, labelName, container);
+                for (var _i = 0, possiblePositions_1 = possiblePositions; _i < possiblePositions_1.length; _i++) {
+                    var position = possiblePositions_1[_i];
+                    var node = ts.getTouchingWord(sourceFile, position, /*includeJsDocComment*/ false);
                     // Only pick labels that are either the target label, or have a target that is the target label
-                    if (node === targetLabel ||
-                        (ts.isJumpStatementTarget(node) && ts.getTargetLabel(node, labelName) === targetLabel)) {
-                        references.push(getReferenceEntryFromNode(node));
+                    if (node && (node === targetLabel || (ts.isJumpStatementTarget(node) && ts.getTargetLabel(node, labelName) === targetLabel))) {
+                        references.push(FindAllReferences.nodeEntry(node));
                     }
-                });
-                var definition = {
-                    containerKind: "",
-                    containerName: "",
-                    fileName: targetLabel.getSourceFile().fileName,
-                    kind: ts.ScriptElementKind.label,
-                    name: labelName,
-                    textSpan: ts.createTextSpanFromBounds(targetLabel.getStart(), targetLabel.getEnd()),
-                    displayParts: [ts.displayPart(labelName, ts.SymbolDisplayPartKind.text)]
-                };
-                return [{ definition: definition, references: references }];
+                }
+                return [{ definition: { type: "label", node: targetLabel }, references: references }];
             }
             function isValidReferencePosition(node, searchSymbolName) {
-                if (node) {
-                    // Compare the length so we filter out strict superstrings of the symbol we are looking for
-                    switch (node.kind) {
-                        case 69 /* Identifier */:
-                            return node.getWidth() === searchSymbolName.length;
-                        case 9 /* StringLiteral */:
-                            if (ts.isLiteralNameOfPropertyDeclarationOrIndexAccess(node) ||
-                                isNameOfExternalModuleImportOrDeclaration(node)) {
-                                // For string literals we have two additional chars for the quotes
-                                return node.getWidth() === searchSymbolName.length + 2;
-                            }
-                            break;
-                        case 8 /* NumericLiteral */:
-                            if (ts.isLiteralNameOfPropertyDeclarationOrIndexAccess(node)) {
-                                return node.getWidth() === searchSymbolName.length;
-                            }
-                            break;
+                // Compare the length so we filter out strict superstrings of the symbol we are looking for
+                switch (node && node.kind) {
+                    case 71 /* Identifier */:
+                        return ts.unescapeIdentifier(node.text).length === searchSymbolName.length;
+                    case 9 /* StringLiteral */:
+                        return (ts.isLiteralNameOfPropertyDeclarationOrIndexAccess(node) || isNameOfExternalModuleImportOrDeclaration(node)) &&
+                            node.text.length === searchSymbolName.length;
+                    case 8 /* NumericLiteral */:
+                        return ts.isLiteralNameOfPropertyDeclarationOrIndexAccess(node) && node.text.length === searchSymbolName.length;
+                    default:
+                        return false;
+                }
+            }
+            function getAllReferencesForKeyword(sourceFiles, keywordKind, cancellationToken) {
+                var references = [];
+                for (var _i = 0, sourceFiles_6 = sourceFiles; _i < sourceFiles_6.length; _i++) {
+                    var sourceFile = sourceFiles_6[_i];
+                    cancellationToken.throwIfCancellationRequested();
+                    addReferencesForKeywordInFile(sourceFile, keywordKind, ts.tokenToString(keywordKind), references);
+                }
+                return references.length ? [{ definition: { type: "keyword", node: references[0].node }, references: references }] : undefined;
+            }
+            function addReferencesForKeywordInFile(sourceFile, kind, searchText, references) {
+                var possiblePositions = getPossibleSymbolReferencePositions(sourceFile, searchText, sourceFile);
+                for (var _i = 0, possiblePositions_2 = possiblePositions; _i < possiblePositions_2.length; _i++) {
+                    var position = possiblePositions_2[_i];
+                    var referenceLocation = ts.getTouchingPropertyName(sourceFile, position, /*includeJsDocComment*/ true);
+                    if (referenceLocation.kind === kind) {
+                        references.push(FindAllReferences.nodeEntry(referenceLocation));
                     }
                 }
-                return false;
             }
-            /** Search within node "container" for references for a search value, where the search value is defined as a
-              * tuple of(searchSymbol, searchText, searchLocation, and searchMeaning).
-              * searchLocation: a node where the search value
-              */
-            function getReferencesInNode(container, searchSymbol, searchText, searchLocation, searchMeaning, findInStrings, findInComments, result, symbolToIndex) {
-                var sourceFile = container.getSourceFile();
-                var start = findInComments ? container.getFullStart() : container.getStart();
-                var possiblePositions = getPossibleSymbolReferencePositions(sourceFile, searchText, start, container.getEnd());
-                var parents = getParentSymbolsOfPropertyAccess();
-                var inheritsFromCache = ts.createMap();
-                if (possiblePositions.length) {
-                    // Build the set of symbols to search for, initially it has only the current symbol
-                    var searchSymbols_1 = populateSearchSymbolSet(searchSymbol, searchLocation);
-                    ts.forEach(possiblePositions, function (position) {
-                        cancellationToken.throwIfCancellationRequested();
-                        var referenceLocation = ts.getTouchingPropertyName(sourceFile, position);
-                        if (!isValidReferencePosition(referenceLocation, searchText)) {
-                            // This wasn't the start of a token.  Check to see if it might be a
-                            // match in a comment or string if that's what the caller is asking
-                            // for.
-                            if (!implementations && ((findInStrings && ts.isInString(sourceFile, position)) ||
-                                (findInComments && ts.isInNonReferenceComment(sourceFile, position)))) {
-                                // In the case where we're looking inside comments/strings, we don't have
-                                // an actual definition.  So just use 'undefined' here.  Features like
-                                // 'Rename' won't care (as they ignore the definitions), and features like
-                                // 'FindReferences' will just filter out these results.
-                                result.push({
-                                    definition: undefined,
-                                    references: [{
-                                            fileName: sourceFile.fileName,
-                                            textSpan: ts.createTextSpan(position, searchText.length),
-                                            isWriteAccess: false,
-                                            isDefinition: false
-                                        }]
-                                });
-                            }
-                            return;
-                        }
-                        if (!(ts.getMeaningFromLocation(referenceLocation) & searchMeaning)) {
-                            return;
-                        }
-                        var referenceSymbol = typeChecker.getSymbolAtLocation(referenceLocation);
-                        if (referenceSymbol) {
-                            var referenceSymbolDeclaration = referenceSymbol.valueDeclaration;
-                            var shorthandValueSymbol = typeChecker.getShorthandAssignmentValueSymbol(referenceSymbolDeclaration);
-                            var relatedSymbol = getRelatedSymbol(searchSymbols_1, referenceSymbol, referenceLocation, 
-                            /*searchLocationIsConstructor*/ searchLocation.kind === 121 /* ConstructorKeyword */, parents, inheritsFromCache);
-                            if (relatedSymbol) {
-                                addReferenceToRelatedSymbol(referenceLocation, relatedSymbol);
-                            }
-                            else if (!(referenceSymbol.flags & 67108864 /* Transient */) && searchSymbols_1.indexOf(shorthandValueSymbol) >= 0) {
-                                addReferenceToRelatedSymbol(referenceSymbolDeclaration.name, shorthandValueSymbol);
-                            }
-                            else if (searchLocation.kind === 121 /* ConstructorKeyword */) {
-                                findAdditionalConstructorReferences(referenceSymbol, referenceLocation);
-                            }
-                        }
-                    });
+            function getReferencesInSourceFile(sourceFile, search, state) {
+                state.cancellationToken.throwIfCancellationRequested();
+                return getReferencesInContainer(sourceFile, sourceFile, search, state);
+            }
+            /**
+             * Search within node "container" for references for a search value, where the search value is defined as a
+             * tuple of(searchSymbol, searchText, searchLocation, and searchMeaning).
+             * searchLocation: a node where the search value
+             */
+            function getReferencesInContainer(container, sourceFile, search, state) {
+                if (!state.markSearchedSymbol(sourceFile, search.symbol)) {
+                    return;
                 }
-                return;
-                /* If we are just looking for implementations and this is a property access expression, we need to get the
-                 * symbol of the local type of the symbol the property is being accessed on. This is because our search
-                 * symbol may have a different parent symbol if the local type's symbol does not declare the property
-                 * being accessed (i.e. it is declared in some parent class or interface)
-                 */
-                function getParentSymbolsOfPropertyAccess() {
-                    if (implementations) {
-                        var propertyAccessExpression = getPropertyAccessExpressionFromRightHandSide(searchLocation);
-                        if (propertyAccessExpression) {
-                            var localParentType = typeChecker.getTypeAtLocation(propertyAccessExpression.expression);
-                            if (localParentType) {
-                                if (localParentType.symbol && localParentType.symbol.flags & (32 /* Class */ | 64 /* Interface */) && localParentType.symbol !== searchSymbol.parent) {
-                                    return [localParentType.symbol];
-                                }
-                                else if (localParentType.flags & 1572864 /* UnionOrIntersection */) {
-                                    return getSymbolsForClassAndInterfaceComponents(localParentType);
-                                }
-                            }
-                        }
+                for (var _i = 0, _a = getPossibleSymbolReferencePositions(sourceFile, search.text, container); _i < _a.length; _i++) {
+                    var position = _a[_i];
+                    getReferencesAtLocation(sourceFile, position, search, state);
+                }
+            }
+            function getReferencesAtLocation(sourceFile, position, search, state) {
+                var referenceLocation = ts.getTouchingPropertyName(sourceFile, position, /*includeJsDocComment*/ true);
+                if (!isValidReferencePosition(referenceLocation, search.text)) {
+                    // This wasn't the start of a token.  Check to see if it might be a
+                    // match in a comment or string if that's what the caller is asking
+                    // for.
+                    if (!state.options.implementations && (state.options.findInStrings && ts.isInString(sourceFile, position) || state.options.findInComments && ts.isInNonReferenceComment(sourceFile, position))) {
+                        // In the case where we're looking inside comments/strings, we don't have
+                        // an actual definition.  So just use 'undefined' here.  Features like
+                        // 'Rename' won't care (as they ignore the definitions), and features like
+                        // 'FindReferences' will just filter out these results.
+                        state.addStringOrCommentReference(sourceFile.fileName, ts.createTextSpan(position, search.text.length));
                     }
+                    return;
+                }
+                if (!(ts.getMeaningFromLocation(referenceLocation) & state.searchMeaning)) {
+                    return;
+                }
+                var referenceSymbol = state.checker.getSymbolAtLocation(referenceLocation);
+                if (!referenceSymbol) {
+                    return;
+                }
+                var parent = referenceLocation.parent;
+                if (ts.isImportSpecifier(parent) && parent.propertyName === referenceLocation) {
+                    // This is added through `singleReferences` in ImportsResult. If we happen to see it again, don't add it again.
+                    return;
+                }
+                if (ts.isExportSpecifier(parent)) {
+                    ts.Debug.assert(referenceLocation.kind === 71 /* Identifier */);
+                    getReferencesAtExportSpecifier(referenceLocation, referenceSymbol, parent, search, state);
+                    return;
+                }
+                var relatedSymbol = getRelatedSymbol(search, referenceSymbol, referenceLocation, state);
+                if (!relatedSymbol) {
+                    getReferenceForShorthandProperty(referenceSymbol, search, state);
+                    return;
+                }
+                if (state.isForConstructor) {
+                    findConstructorReferences(referenceLocation, sourceFile, search, state);
                 }
-                function getPropertyAccessExpressionFromRightHandSide(node) {
-                    return ts.isRightSideOfPropertyAccess(node) && node.parent;
+                else {
+                    addReference(referenceLocation, relatedSymbol, search.location, state);
+                }
+                getImportOrExportReferences(referenceLocation, referenceSymbol, search, state);
+            }
+            function getReferencesAtExportSpecifier(referenceLocation, referenceSymbol, exportSpecifier, search, state) {
+                var parent = exportSpecifier.parent, propertyName = exportSpecifier.propertyName, name = exportSpecifier.name;
+                var exportDeclaration = parent.parent;
+                var localSymbol = getLocalSymbolForExportSpecifier(referenceLocation, referenceSymbol, exportSpecifier, state.checker);
+                if (!search.includes(localSymbol)) {
+                    return;
                 }
-                /** Adds references when a constructor is used with `new this()` in its own class and `super()` calls in subclasses.  */
-                function findAdditionalConstructorReferences(referenceSymbol, referenceLocation) {
-                    ts.Debug.assert(ts.isClassLike(searchSymbol.valueDeclaration));
-                    var referenceClass = referenceLocation.parent;
-                    if (referenceSymbol === searchSymbol && ts.isClassLike(referenceClass)) {
-                        ts.Debug.assert(referenceClass.name === referenceLocation);
-                        // This is the class declaration containing the constructor.
-                        addReferences(findOwnConstructorCalls(searchSymbol));
+                if (!propertyName) {
+                    addRef();
+                }
+                else if (referenceLocation === propertyName) {
+                    // For `export { foo as bar } from "baz"`, "`foo`" will be added from the singleReferences for import searches of the original export.
+                    // For `export { foo as bar };`, where `foo` is a local, so add it now.
+                    if (!exportDeclaration.moduleSpecifier) {
+                        addRef();
                     }
-                    else {
-                        // If this class appears in `extends C`, then the extending class' "super" calls are references.
-                        var classExtending = tryGetClassByExtendingIdentifier(referenceLocation);
-                        if (classExtending && ts.isClassLike(classExtending) && followAliasIfNecessary(referenceSymbol, referenceLocation) === searchSymbol) {
-                            addReferences(superConstructorAccesses(classExtending));
-                        }
+                    if (!state.options.isForRename && state.markSeenReExportRHS(name)) {
+                        addReference(name, referenceSymbol, name, state);
+                    }
+                }
+                else {
+                    if (state.markSeenReExportRHS(referenceLocation)) {
+                        addRef();
                     }
                 }
-                function addReferences(references) {
-                    if (references.length) {
-                        var referencedSymbol = getReferencedSymbol(searchSymbol);
-                        ts.addRange(referencedSymbol.references, ts.map(references, getReferenceEntryFromNode));
+                // For `export { foo as bar }`, rename `foo`, but not `bar`.
+                if (!(referenceLocation === propertyName && state.options.isForRename)) {
+                    var exportKind = referenceLocation.originalKeywordKind === 79 /* DefaultKeyword */ ? 1 /* Default */ : 0 /* Named */;
+                    var exportInfo = FindAllReferences.getExportInfo(referenceSymbol, exportKind, state.checker);
+                    ts.Debug.assert(!!exportInfo);
+                    searchForImportsOfExport(referenceLocation, referenceSymbol, exportInfo, state);
+                }
+                // At `export { x } from "foo"`, also search for the imported symbol `"foo".x`.
+                if (search.comingFrom !== 1 /* Export */ && exportDeclaration.moduleSpecifier && !propertyName) {
+                    searchForImportedSymbol(state.checker.getExportSpecifierLocalTargetSymbol(exportSpecifier), state);
+                }
+                function addRef() {
+                    addReference(referenceLocation, localSymbol, search.location, state);
+                }
+            }
+            function getLocalSymbolForExportSpecifier(referenceLocation, referenceSymbol, exportSpecifier, checker) {
+                return isExportSpecifierAlias(referenceLocation, exportSpecifier) ? checker.getExportSpecifierLocalTargetSymbol(exportSpecifier) : referenceSymbol;
+            }
+            function isExportSpecifierAlias(referenceLocation, exportSpecifier) {
+                var parent = exportSpecifier.parent, propertyName = exportSpecifier.propertyName, name = exportSpecifier.name;
+                ts.Debug.assert(propertyName === referenceLocation || name === referenceLocation);
+                if (propertyName) {
+                    // Given `export { foo as bar } [from "someModule"]`: It's an alias at `foo`, but at `bar` it's a new symbol.
+                    return propertyName === referenceLocation;
+                }
+                else {
+                    // `export { foo } from "foo"` is a re-export.
+                    // `export { foo };` is not a re-export, it creates an alias for the local variable `foo`.
+                    return !parent.parent.moduleSpecifier;
+                }
+            }
+            function getImportOrExportReferences(referenceLocation, referenceSymbol, search, state) {
+                var importOrExport = FindAllReferences.getImportOrExportSymbol(referenceLocation, referenceSymbol, state.checker, search.comingFrom === 1 /* Export */);
+                if (!importOrExport)
+                    return;
+                var symbol = importOrExport.symbol;
+                if (importOrExport.kind === 0 /* Import */) {
+                    if (!state.options.isForRename || importOrExport.isNamedImport) {
+                        searchForImportedSymbol(symbol, state);
                     }
                 }
-                /** `classSymbol` is the class where the constructor was defined.
-                 * Reference the constructor and all calls to `new this()`.
+                else {
+                    // We don't check for `state.isForRename`, even for default exports, because importers that previously matched the export name should be updated to continue matching.
+                    searchForImportsOfExport(referenceLocation, symbol, importOrExport.exportInfo, state);
+                }
+            }
+            function getReferenceForShorthandProperty(_a, search, state) {
+                var flags = _a.flags, valueDeclaration = _a.valueDeclaration;
+                var shorthandValueSymbol = state.checker.getShorthandAssignmentValueSymbol(valueDeclaration);
+                /*
+                 * Because in short-hand property assignment, an identifier which stored as name of the short-hand property assignment
+                 * has two meanings: property name and property value. Therefore when we do findAllReference at the position where
+                 * an identifier is declared, the language service should return the position of the variable declaration as well as
+                 * the position in short-hand property assignment excluding property accessing. However, if we do findAllReference at the
+                 * position of property accessing, the referenceEntry of such position will be handled in the first case.
                  */
-                function findOwnConstructorCalls(classSymbol) {
-                    var result = [];
-                    for (var _i = 0, _a = classSymbol.members["__constructor"].declarations; _i < _a.length; _i++) {
-                        var decl = _a[_i];
-                        ts.Debug.assert(decl.kind === 148 /* Constructor */);
-                        var ctrKeyword = decl.getChildAt(0);
-                        ts.Debug.assert(ctrKeyword.kind === 121 /* ConstructorKeyword */);
-                        result.push(ctrKeyword);
-                    }
-                    ts.forEachProperty(classSymbol.exports, function (member) {
-                        var decl = member.valueDeclaration;
-                        if (decl && decl.kind === 147 /* MethodDeclaration */) {
-                            var body = decl.body;
-                            if (body) {
-                                forEachDescendantOfKind(body, 97 /* ThisKeyword */, function (thisKeyword) {
-                                    if (ts.isNewExpressionTarget(thisKeyword)) {
-                                        result.push(thisKeyword);
-                                    }
-                                });
-                            }
-                        }
-                    });
-                    return result;
+                if (!(flags & 134217728 /* Transient */) && search.includes(shorthandValueSymbol)) {
+                    addReference(ts.getNameOfDeclaration(valueDeclaration), shorthandValueSymbol, search.location, state);
+                }
+            }
+            function addReference(referenceLocation, relatedSymbol, searchLocation, state) {
+                var addRef = state.referenceAdder(relatedSymbol, searchLocation);
+                if (state.options.implementations) {
+                    addImplementationReferences(referenceLocation, addRef, state);
+                }
+                else {
+                    addRef(referenceLocation);
+                }
+            }
+            /** Adds references when a constructor is used with `new this()` in its own class and `super()` calls in subclasses.  */
+            function findConstructorReferences(referenceLocation, sourceFile, search, state) {
+                if (ts.isNewExpressionTarget(referenceLocation)) {
+                    addReference(referenceLocation, search.symbol, search.location, state);
+                }
+                var pusher = state.referenceAdder(search.symbol, search.location);
+                if (ts.isClassLike(referenceLocation.parent)) {
+                    ts.Debug.assert(referenceLocation.parent.name === referenceLocation);
+                    // This is the class declaration containing the constructor.
+                    findOwnConstructorReferences(search.symbol, sourceFile, pusher);
                 }
-                /** Find references to `super` in the constructor of an extending class.  */
-                function superConstructorAccesses(cls) {
-                    var symbol = cls.symbol;
-                    var ctr = symbol.members["__constructor"];
-                    if (!ctr) {
-                        return [];
+                else {
+                    // If this class appears in `extends C`, then the extending class' "super" calls are references.
+                    var classExtending = tryGetClassByExtendingIdentifier(referenceLocation);
+                    if (classExtending && ts.isClassLike(classExtending)) {
+                        findSuperConstructorAccesses(classExtending, pusher);
                     }
-                    var result = [];
-                    for (var _i = 0, _a = ctr.declarations; _i < _a.length; _i++) {
-                        var decl = _a[_i];
-                        ts.Debug.assert(decl.kind === 148 /* Constructor */);
+                }
+            }
+            function getPropertyAccessExpressionFromRightHandSide(node) {
+                return ts.isRightSideOfPropertyAccess(node) && node.parent;
+            }
+            /**
+             * `classSymbol` is the class where the constructor was defined.
+             * Reference the constructor and all calls to `new this()`.
+             */
+            function findOwnConstructorReferences(classSymbol, sourceFile, addNode) {
+                for (var _i = 0, _a = classSymbol.members.get("__constructor").declarations; _i < _a.length; _i++) {
+                    var decl = _a[_i];
+                    var ctrKeyword = ts.findChildOfKind(decl, 123 /* ConstructorKeyword */, sourceFile);
+                    ts.Debug.assert(decl.kind === 152 /* Constructor */ && !!ctrKeyword);
+                    addNode(ctrKeyword);
+                }
+                classSymbol.exports.forEach(function (member) {
+                    var decl = member.valueDeclaration;
+                    if (decl && decl.kind === 151 /* MethodDeclaration */) {
                         var body = decl.body;
                         if (body) {
-                            forEachDescendantOfKind(body, 95 /* SuperKeyword */, function (node) {
-                                if (ts.isCallExpressionTarget(node)) {
-                                    result.push(node);
+                            forEachDescendantOfKind(body, 99 /* ThisKeyword */, function (thisKeyword) {
+                                if (ts.isNewExpressionTarget(thisKeyword)) {
+                                    addNode(thisKeyword);
                                 }
                             });
                         }
                     }
-                    ;
-                    return result;
+                });
+            }
+            /** Find references to `super` in the constructor of an extending class.  */
+            function findSuperConstructorAccesses(cls, addNode) {
+                var symbol = cls.symbol;
+                var ctr = symbol.members.get("__constructor");
+                if (!ctr) {
+                    return;
                 }
-                function getReferencedSymbol(symbol) {
-                    var symbolId = ts.getSymbolId(symbol);
-                    var index = symbolToIndex[symbolId];
-                    if (index === undefined) {
-                        index = result.length;
-                        symbolToIndex[symbolId] = index;
-                        result.push({
-                            definition: getDefinition(symbol),
-                            references: []
+                for (var _i = 0, _a = ctr.declarations; _i < _a.length; _i++) {
+                    var decl = _a[_i];
+                    ts.Debug.assert(decl.kind === 152 /* Constructor */);
+                    var body = decl.body;
+                    if (body) {
+                        forEachDescendantOfKind(body, 97 /* SuperKeyword */, function (node) {
+                            if (ts.isCallExpressionTarget(node)) {
+                                addNode(node);
+                            }
                         });
                     }
-                    return result[index];
-                }
-                function addReferenceToRelatedSymbol(node, relatedSymbol) {
-                    var references = getReferencedSymbol(relatedSymbol).references;
-                    if (implementations) {
-                        getImplementationReferenceEntryForNode(node, references);
-                    }
-                    else {
-                        references.push(getReferenceEntryFromNode(node));
-                    }
                 }
             }
-            function getImplementationReferenceEntryForNode(refNode, result) {
+            function addImplementationReferences(refNode, addReference, state) {
                 // Check if we found a function/propertyAssignment/method with an implementation or initializer
                 if (ts.isDeclarationName(refNode) && isImplementation(refNode.parent)) {
-                    result.push(getReferenceEntryFromNode(refNode.parent));
+                    addReference(refNode.parent);
+                    return;
                 }
-                else if (refNode.kind === 69 /* Identifier */) {
-                    if (refNode.parent.kind === 254 /* ShorthandPropertyAssignment */) {
-                        // Go ahead and dereference the shorthand assignment by going to its definition
-                        getReferenceEntriesForShorthandPropertyAssignment(refNode, typeChecker, result);
-                    }
-                    // Check if the node is within an extends or implements clause
-                    var containingClass = getContainingClassIfInHeritageClause(refNode);
-                    if (containingClass) {
-                        result.push(getReferenceEntryFromNode(containingClass));
-                        return;
-                    }
-                    // If we got a type reference, try and see if the reference applies to any expressions that can implement an interface
-                    var containingTypeReference = getContainingTypeReference(refNode);
-                    if (containingTypeReference) {
-                        var parent_21 = containingTypeReference.parent;
-                        if (ts.isVariableLike(parent_21) && parent_21.type === containingTypeReference && parent_21.initializer && isImplementationExpression(parent_21.initializer)) {
-                            maybeAdd(getReferenceEntryFromNode(parent_21.initializer));
-                        }
-                        else if (ts.isFunctionLike(parent_21) && parent_21.type === containingTypeReference && parent_21.body) {
-                            if (parent_21.body.kind === 199 /* Block */) {
-                                ts.forEachReturnStatement(parent_21.body, function (returnStatement) {
-                                    if (returnStatement.expression && isImplementationExpression(returnStatement.expression)) {
-                                        maybeAdd(getReferenceEntryFromNode(returnStatement.expression));
-                                    }
-                                });
-                            }
-                            else if (isImplementationExpression(parent_21.body)) {
-                                maybeAdd(getReferenceEntryFromNode(parent_21.body));
-                            }
+                if (refNode.kind !== 71 /* Identifier */) {
+                    return;
+                }
+                if (refNode.parent.kind === 262 /* ShorthandPropertyAssignment */) {
+                    // Go ahead and dereference the shorthand assignment by going to its definition
+                    getReferenceEntriesForShorthandPropertyAssignment(refNode, state.checker, addReference);
+                }
+                // Check if the node is within an extends or implements clause
+                var containingClass = getContainingClassIfInHeritageClause(refNode);
+                if (containingClass) {
+                    addReference(containingClass);
+                    return;
+                }
+                // If we got a type reference, try and see if the reference applies to any expressions that can implement an interface
+                var containingTypeReference = getContainingTypeReference(refNode);
+                if (containingTypeReference && state.markSeenContainingTypeReference(containingTypeReference)) {
+                    var parent_23 = containingTypeReference.parent;
+                    if (ts.isVariableLike(parent_23) && parent_23.type === containingTypeReference && parent_23.initializer && isImplementationExpression(parent_23.initializer)) {
+                        addReference(parent_23.initializer);
+                    }
+                    else if (ts.isFunctionLike(parent_23) && parent_23.type === containingTypeReference && parent_23.body) {
+                        if (parent_23.body.kind === 207 /* Block */) {
+                            ts.forEachReturnStatement(parent_23.body, function (returnStatement) {
+                                if (returnStatement.expression && isImplementationExpression(returnStatement.expression)) {
+                                    addReference(returnStatement.expression);
+                                }
+                            });
                         }
-                        else if (ts.isAssertionExpression(parent_21) && isImplementationExpression(parent_21.expression)) {
-                            maybeAdd(getReferenceEntryFromNode(parent_21.expression));
+                        else if (isImplementationExpression(parent_23.body)) {
+                            addReference(parent_23.body);
                         }
                     }
-                }
-                // Type nodes can contain multiple references to the same type. For example:
-                //      let x: Foo & (Foo & Bar) = ...
-                // Because we are returning the implementation locations and not the identifier locations,
-                // duplicate entries would be returned here as each of the type references is part of
-                // the same implementation. For that reason, check before we add a new entry
-                function maybeAdd(a) {
-                    if (!ts.forEach(result, function (b) { return a.fileName === b.fileName && a.textSpan.start === b.textSpan.start && a.textSpan.length === b.textSpan.length; })) {
-                        result.push(a);
+                    else if (ts.isAssertionExpression(parent_23) && isImplementationExpression(parent_23.expression)) {
+                        addReference(parent_23.expression);
                     }
                 }
             }
@@ -66106,7 +79798,7 @@ var ts;
                     if (componentType.symbol && componentType.symbol.getFlags() & (32 /* Class */ | 64 /* Interface */)) {
                         result.push(componentType.symbol);
                     }
-                    if (componentType.getFlags() & 1572864 /* UnionOrIntersection */) {
+                    if (componentType.getFlags() & 196608 /* UnionOrIntersection */) {
                         getSymbolsForClassAndInterfaceComponents(componentType, result);
                     }
                 }
@@ -66124,12 +79816,12 @@ var ts;
             }
             function getContainingClassIfInHeritageClause(node) {
                 if (node && node.parent) {
-                    if (node.kind === 194 /* ExpressionWithTypeArguments */
-                        && node.parent.kind === 251 /* HeritageClause */
+                    if (node.kind === 201 /* ExpressionWithTypeArguments */
+                        && node.parent.kind === 259 /* HeritageClause */
                         && ts.isClassLike(node.parent.parent)) {
                         return node.parent.parent;
                     }
-                    else if (node.kind === 69 /* Identifier */ || node.kind === 172 /* PropertyAccessExpression */) {
+                    else if (node.kind === 71 /* Identifier */ || node.kind === 179 /* PropertyAccessExpression */) {
                         return getContainingClassIfInHeritageClause(node.parent);
                     }
                 }
@@ -66139,15 +79831,18 @@ var ts;
              * Returns true if this is an expression that can be considered an implementation
              */
             function isImplementationExpression(node) {
-                // Unwrap parentheses
-                if (node.kind === 178 /* ParenthesizedExpression */) {
-                    return isImplementationExpression(node.expression);
+                switch (node.kind) {
+                    case 185 /* ParenthesizedExpression */:
+                        return isImplementationExpression(node.expression);
+                    case 187 /* ArrowFunction */:
+                    case 186 /* FunctionExpression */:
+                    case 178 /* ObjectLiteralExpression */:
+                    case 199 /* ClassExpression */:
+                    case 177 /* ArrayLiteralExpression */:
+                        return true;
+                    default:
+                        return false;
                 }
-                return node.kind === 180 /* ArrowFunction */ ||
-                    node.kind === 179 /* FunctionExpression */ ||
-                    node.kind === 171 /* ObjectLiteralExpression */ ||
-                    node.kind === 192 /* ClassExpression */ ||
-                    node.kind === 170 /* ArrayLiteralExpression */;
             }
             /**
              * Determines if the parent symbol occurs somewhere in the child's ancestry. If the parent symbol
@@ -66168,7 +79863,7 @@ var ts;
              * @param parent        Another class or interface Symbol
              * @param cachedResults A map of symbol id pairs (i.e. "child,parent") to booleans indicating previous results
              */
-            function explicitlyInheritsFrom(child, parent, cachedResults) {
+            function explicitlyInheritsFrom(child, parent, cachedResults, checker) {
                 var parentIsInterface = parent.getFlags() & 64 /* Interface */;
                 return searchHierarchy(child);
                 function searchHierarchy(symbol) {
@@ -66176,11 +79871,12 @@ var ts;
                         return true;
                     }
                     var key = ts.getSymbolId(symbol) + "," + ts.getSymbolId(parent);
-                    if (key in cachedResults) {
-                        return cachedResults[key];
+                    var cached = cachedResults.get(key);
+                    if (cached !== undefined) {
+                        return cached;
                     }
                     // Set the key so that we don't infinitely recurse
-                    cachedResults[key] = false;
+                    cachedResults.set(key, false);
                     var inherits = ts.forEach(symbol.getDeclarations(), function (declaration) {
                         if (ts.isClassLike(declaration)) {
                             if (parentIsInterface) {
@@ -66196,19 +79892,19 @@ var ts;
                             }
                             return searchTypeReference(ts.getClassExtendsHeritageClauseElement(declaration));
                         }
-                        else if (declaration.kind === 222 /* InterfaceDeclaration */) {
+                        else if (declaration.kind === 230 /* InterfaceDeclaration */) {
                             if (parentIsInterface) {
                                 return ts.forEach(ts.getInterfaceBaseTypeNodes(declaration), searchTypeReference);
                             }
                         }
                         return false;
                     });
-                    cachedResults[key] = inherits;
+                    cachedResults.set(key, inherits);
                     return inherits;
                 }
                 function searchTypeReference(typeReference) {
                     if (typeReference) {
-                        var type = typeChecker.getTypeAtLocation(typeReference);
+                        var type = checker.getTypeAtLocation(typeReference);
                         if (type && type.symbol) {
                             return searchHierarchy(type.symbol);
                         }
@@ -66224,13 +79920,13 @@ var ts;
                 // Whether 'super' occurs in a static context within a class.
                 var staticFlag = 32 /* Static */;
                 switch (searchSpaceNode.kind) {
-                    case 145 /* PropertyDeclaration */:
-                    case 144 /* PropertySignature */:
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                    case 148 /* Constructor */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
+                    case 149 /* PropertyDeclaration */:
+                    case 148 /* PropertySignature */:
+                    case 151 /* MethodDeclaration */:
+                    case 150 /* MethodSignature */:
+                    case 152 /* Constructor */:
+                    case 153 /* GetAccessor */:
+                    case 154 /* SetAccessor */:
                         staticFlag &= ts.getModifierFlags(searchSpaceNode);
                         searchSpaceNode = searchSpaceNode.parent; // re-assign to be the owning class
                         break;
@@ -66239,50 +79935,49 @@ var ts;
                 }
                 var references = [];
                 var sourceFile = searchSpaceNode.getSourceFile();
-                var possiblePositions = getPossibleSymbolReferencePositions(sourceFile, "super", searchSpaceNode.getStart(), searchSpaceNode.getEnd());
-                ts.forEach(possiblePositions, function (position) {
-                    cancellationToken.throwIfCancellationRequested();
-                    var node = ts.getTouchingWord(sourceFile, position);
-                    if (!node || node.kind !== 95 /* SuperKeyword */) {
-                        return;
+                var possiblePositions = getPossibleSymbolReferencePositions(sourceFile, "super", searchSpaceNode);
+                for (var _i = 0, possiblePositions_3 = possiblePositions; _i < possiblePositions_3.length; _i++) {
+                    var position = possiblePositions_3[_i];
+                    var node = ts.getTouchingWord(sourceFile, position, /*includeJsDocComment*/ false);
+                    if (!node || node.kind !== 97 /* SuperKeyword */) {
+                        continue;
                     }
                     var container = ts.getSuperContainer(node, /*stopOnFunctions*/ false);
                     // If we have a 'super' container, we must have an enclosing class.
                     // Now make sure the owning class is the same as the search-space
                     // and has the same static qualifier as the original 'super's owner.
                     if (container && (32 /* Static */ & ts.getModifierFlags(container)) === staticFlag && container.parent.symbol === searchSpaceNode.symbol) {
-                        references.push(getReferenceEntryFromNode(node));
+                        references.push(FindAllReferences.nodeEntry(node));
                     }
-                });
-                var definition = getDefinition(searchSpaceNode.symbol);
-                return [{ definition: definition, references: references }];
+                }
+                return [{ definition: { type: "symbol", symbol: searchSpaceNode.symbol, node: superKeyword }, references: references }];
             }
-            function getReferencesForThisKeyword(thisOrSuperKeyword, sourceFiles) {
+            function getReferencesForThisKeyword(thisOrSuperKeyword, sourceFiles, cancellationToken) {
                 var searchSpaceNode = ts.getThisContainer(thisOrSuperKeyword, /* includeArrowFunctions */ false);
                 // Whether 'this' occurs in a static context within a class.
                 var staticFlag = 32 /* Static */;
                 switch (searchSpaceNode.kind) {
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
+                    case 151 /* MethodDeclaration */:
+                    case 150 /* MethodSignature */:
                         if (ts.isObjectLiteralMethod(searchSpaceNode)) {
                             break;
                         }
-                    // fall through
-                    case 145 /* PropertyDeclaration */:
-                    case 144 /* PropertySignature */:
-                    case 148 /* Constructor */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
+                    // falls through
+                    case 149 /* PropertyDeclaration */:
+                    case 148 /* PropertySignature */:
+                    case 152 /* Constructor */:
+                    case 153 /* GetAccessor */:
+                    case 154 /* SetAccessor */:
                         staticFlag &= ts.getModifierFlags(searchSpaceNode);
                         searchSpaceNode = searchSpaceNode.parent; // re-assign to be the owning class
                         break;
-                    case 256 /* SourceFile */:
+                    case 265 /* SourceFile */:
                         if (ts.isExternalModule(searchSpaceNode)) {
                             return undefined;
                         }
-                    // Fall through
-                    case 220 /* FunctionDeclaration */:
-                    case 179 /* FunctionExpression */:
+                    // falls through
+                    case 228 /* FunctionDeclaration */:
+                    case 186 /* FunctionExpression */:
                         break;
                     // Computed properties in classes are not handled here because references to this are illegal,
                     // so there is no point finding references to them.
@@ -66291,155 +79986,115 @@ var ts;
                 }
                 var references = [];
                 var possiblePositions;
-                if (searchSpaceNode.kind === 256 /* SourceFile */) {
+                if (searchSpaceNode.kind === 265 /* SourceFile */) {
                     ts.forEach(sourceFiles, function (sourceFile) {
-                        possiblePositions = getPossibleSymbolReferencePositions(sourceFile, "this", sourceFile.getStart(), sourceFile.getEnd());
+                        cancellationToken.throwIfCancellationRequested();
+                        possiblePositions = getPossibleSymbolReferencePositions(sourceFile, "this");
                         getThisReferencesInFile(sourceFile, sourceFile, possiblePositions, references);
                     });
                 }
                 else {
                     var sourceFile = searchSpaceNode.getSourceFile();
-                    possiblePositions = getPossibleSymbolReferencePositions(sourceFile, "this", searchSpaceNode.getStart(), searchSpaceNode.getEnd());
+                    possiblePositions = getPossibleSymbolReferencePositions(sourceFile, "this", searchSpaceNode);
                     getThisReferencesInFile(sourceFile, searchSpaceNode, possiblePositions, references);
                 }
-                var thisOrSuperSymbol = typeChecker.getSymbolAtLocation(thisOrSuperKeyword);
-                var displayParts = thisOrSuperSymbol && ts.SymbolDisplay.getSymbolDisplayPartsDocumentationAndSymbolKind(typeChecker, thisOrSuperSymbol, thisOrSuperKeyword.getSourceFile(), ts.getContainerNode(thisOrSuperKeyword), thisOrSuperKeyword).displayParts;
                 return [{
-                        definition: {
-                            containerKind: "",
-                            containerName: "",
-                            fileName: node.getSourceFile().fileName,
-                            kind: ts.ScriptElementKind.variableElement,
-                            name: "this",
-                            textSpan: ts.createTextSpanFromBounds(node.getStart(), node.getEnd()),
-                            displayParts: displayParts
-                        },
+                        definition: { type: "this", node: thisOrSuperKeyword },
                         references: references
                     }];
                 function getThisReferencesInFile(sourceFile, searchSpaceNode, possiblePositions, result) {
                     ts.forEach(possiblePositions, function (position) {
-                        cancellationToken.throwIfCancellationRequested();
-                        var node = ts.getTouchingWord(sourceFile, position);
+                        var node = ts.getTouchingWord(sourceFile, position, /*includeJsDocComment*/ false);
                         if (!node || !ts.isThis(node)) {
                             return;
                         }
                         var container = ts.getThisContainer(node, /* includeArrowFunctions */ false);
                         switch (searchSpaceNode.kind) {
-                            case 179 /* FunctionExpression */:
-                            case 220 /* FunctionDeclaration */:
+                            case 186 /* FunctionExpression */:
+                            case 228 /* FunctionDeclaration */:
                                 if (searchSpaceNode.symbol === container.symbol) {
-                                    result.push(getReferenceEntryFromNode(node));
+                                    result.push(FindAllReferences.nodeEntry(node));
                                 }
                                 break;
-                            case 147 /* MethodDeclaration */:
-                            case 146 /* MethodSignature */:
+                            case 151 /* MethodDeclaration */:
+                            case 150 /* MethodSignature */:
                                 if (ts.isObjectLiteralMethod(searchSpaceNode) && searchSpaceNode.symbol === container.symbol) {
-                                    result.push(getReferenceEntryFromNode(node));
+                                    result.push(FindAllReferences.nodeEntry(node));
                                 }
                                 break;
-                            case 192 /* ClassExpression */:
-                            case 221 /* ClassDeclaration */:
+                            case 199 /* ClassExpression */:
+                            case 229 /* ClassDeclaration */:
                                 // Make sure the container belongs to the same class
                                 // and has the appropriate static modifier from the original container.
                                 if (container.parent && searchSpaceNode.symbol === container.parent.symbol && (ts.getModifierFlags(container) & 32 /* Static */) === staticFlag) {
-                                    result.push(getReferenceEntryFromNode(node));
+                                    result.push(FindAllReferences.nodeEntry(node));
                                 }
                                 break;
-                            case 256 /* SourceFile */:
-                                if (container.kind === 256 /* SourceFile */ && !ts.isExternalModule(container)) {
-                                    result.push(getReferenceEntryFromNode(node));
+                            case 265 /* SourceFile */:
+                                if (container.kind === 265 /* SourceFile */ && !ts.isExternalModule(container)) {
+                                    result.push(FindAllReferences.nodeEntry(node));
                                 }
                                 break;
                         }
                     });
                 }
             }
-            function getReferencesForStringLiteral(node, sourceFiles) {
-                var type = ts.getStringLiteralTypeForNode(node, typeChecker);
-                if (!type) {
-                    // nothing to do here. moving on
-                    return undefined;
-                }
+            function getReferencesForStringLiteral(node, sourceFiles, cancellationToken) {
                 var references = [];
-                for (var _i = 0, sourceFiles_9 = sourceFiles; _i < sourceFiles_9.length; _i++) {
-                    var sourceFile = sourceFiles_9[_i];
-                    var possiblePositions = getPossibleSymbolReferencePositions(sourceFile, type.text, sourceFile.getStart(), sourceFile.getEnd());
-                    getReferencesForStringLiteralInFile(sourceFile, type, possiblePositions, references);
+                for (var _i = 0, sourceFiles_7 = sourceFiles; _i < sourceFiles_7.length; _i++) {
+                    var sourceFile = sourceFiles_7[_i];
+                    cancellationToken.throwIfCancellationRequested();
+                    var possiblePositions = getPossibleSymbolReferencePositions(sourceFile, node.text);
+                    getReferencesForStringLiteralInFile(sourceFile, node.text, possiblePositions, references);
                 }
                 return [{
-                        definition: {
-                            containerKind: "",
-                            containerName: "",
-                            fileName: node.getSourceFile().fileName,
-                            kind: ts.ScriptElementKind.variableElement,
-                            name: type.text,
-                            textSpan: ts.createTextSpanFromBounds(node.getStart(), node.getEnd()),
-                            displayParts: [ts.displayPart(ts.getTextOfNode(node), ts.SymbolDisplayPartKind.stringLiteral)]
-                        },
+                        definition: { type: "string", node: node },
                         references: references
                     }];
-                function getReferencesForStringLiteralInFile(sourceFile, searchType, possiblePositions, references) {
-                    for (var _i = 0, possiblePositions_1 = possiblePositions; _i < possiblePositions_1.length; _i++) {
-                        var position = possiblePositions_1[_i];
-                        cancellationToken.throwIfCancellationRequested();
-                        var node_2 = ts.getTouchingWord(sourceFile, position);
-                        if (!node_2 || node_2.kind !== 9 /* StringLiteral */) {
-                            return;
-                        }
-                        var type_1 = ts.getStringLiteralTypeForNode(node_2, typeChecker);
-                        if (type_1 === searchType) {
-                            references.push(getReferenceEntryFromNode(node_2));
+                function getReferencesForStringLiteralInFile(sourceFile, searchText, possiblePositions, references) {
+                    for (var _i = 0, possiblePositions_4 = possiblePositions; _i < possiblePositions_4.length; _i++) {
+                        var position = possiblePositions_4[_i];
+                        var node_7 = ts.getTouchingWord(sourceFile, position, /*includeJsDocComment*/ false);
+                        if (node_7 && node_7.kind === 9 /* StringLiteral */ && node_7.text === searchText) {
+                            references.push(FindAllReferences.nodeEntry(node_7, /*isInString*/ true));
                         }
                     }
                 }
             }
-            function populateSearchSymbolSet(symbol, location) {
+            // For certain symbol kinds, we need to include other symbols in the search set.
+            // This is not needed when searching for re-exports.
+            function populateSearchSymbolSet(symbol, location, checker, implementations) {
                 // The search set contains at least the current symbol
                 var result = [symbol];
-                // If the location is name of property symbol from object literal destructuring pattern
-                // Search the property symbol
-                //      for ( { property: p2 } of elems) { }
-                var containingObjectLiteralElement = getContainingObjectLiteralElement(location);
-                if (containingObjectLiteralElement && containingObjectLiteralElement.kind !== 254 /* ShorthandPropertyAssignment */) {
-                    var propertySymbol = getPropertySymbolOfDestructuringAssignment(location);
-                    if (propertySymbol) {
-                        result.push(propertySymbol);
-                    }
-                }
-                // If the symbol is an alias, add what it aliases to the list
-                //     import {a} from "mod";
-                //     export {a}
-                // If the symbol is an alias to default declaration, add what it aliases to the list
-                //     declare "mod" { export default class B { } }
-                //     import B from "mod";
-                //// For export specifiers, the exported name can be referring to a local symbol, e.g.:
-                ////     import {a} from "mod";
-                ////     export {a as somethingElse}
-                //// We want the *local* declaration of 'a' as declared in the import,
-                //// *not* as declared within "mod" (or farther)
-                var aliasSymbol = getAliasSymbolForPropertyNameSymbol(symbol, location);
-                if (aliasSymbol) {
-                    result = result.concat(populateSearchSymbolSet(aliasSymbol, location));
-                }
-                // If the location is in a context sensitive location (i.e. in an object literal) try
-                // to get a contextual type for it, and add the property symbol from the contextual
-                // type to the search set
+                var containingObjectLiteralElement = ts.getContainingObjectLiteralElement(location);
                 if (containingObjectLiteralElement) {
-                    ts.forEach(getPropertySymbolsFromContextualType(containingObjectLiteralElement), function (contextualSymbol) {
-                        ts.addRange(result, typeChecker.getRootSymbols(contextualSymbol));
+                    // If the location is name of property symbol from object literal destructuring pattern
+                    // Search the property symbol
+                    //      for ( { property: p2 } of elems) { }
+                    if (containingObjectLiteralElement.kind !== 262 /* ShorthandPropertyAssignment */) {
+                        var propertySymbol = getPropertySymbolOfDestructuringAssignment(location, checker);
+                        if (propertySymbol) {
+                            result.push(propertySymbol);
+                        }
+                    }
+                    // If the location is in a context sensitive location (i.e. in an object literal) try
+                    // to get a contextual type for it, and add the property symbol from the contextual
+                    // type to the search set
+                    ts.forEach(getPropertySymbolsFromContextualType(containingObjectLiteralElement, checker), function (contextualSymbol) {
+                        ts.addRange(result, checker.getRootSymbols(contextualSymbol));
                     });
                     /* Because in short-hand property assignment, location has two meaning : property name and as value of the property
-                        * When we do findAllReference at the position of the short-hand property assignment, we would want to have references to position of
-                        * property name and variable declaration of the identifier.
-                        * Like in below example, when querying for all references for an identifier 'name', of the property assignment, the language service
-                        * should show both 'name' in 'obj' and 'name' in variable declaration
-                        *      const name = "Foo";
-                        *      const obj = { name };
-                        * In order to do that, we will populate the search set with the value symbol of the identifier as a value of the property assignment
-                        * so that when matching with potential reference symbol, both symbols from property declaration and variable declaration
-                        * will be included correctly.
-                        */
-                    var shorthandValueSymbol = typeChecker.getShorthandAssignmentValueSymbol(location.parent);
+                     * When we do findAllReference at the position of the short-hand property assignment, we would want to have references to position of
+                     * property name and variable declaration of the identifier.
+                     * Like in below example, when querying for all references for an identifier 'name', of the property assignment, the language service
+                     * should show both 'name' in 'obj' and 'name' in variable declaration
+                     *      const name = "Foo";
+                     *      const obj = { name };
+                     * In order to do that, we will populate the search set with the value symbol of the identifier as a value of the property assignment
+                     * so that when matching with potential reference symbol, both symbols from property declaration and variable declaration
+                     * will be included correctly.
+                     */
+                    var shorthandValueSymbol = checker.getShorthandAssignmentValueSymbol(location.parent);
                     if (shorthandValueSymbol) {
                         result.push(shorthandValueSymbol);
                     }
@@ -66448,27 +80103,28 @@ var ts;
                 // we should include both parameter declaration symbol and property declaration symbol
                 // Parameter Declaration symbol is only visible within function scope, so the symbol is stored in constructor.locals.
                 // Property Declaration symbol is a member of the class, so the symbol is stored in its class Declaration.symbol.members
-                if (symbol.valueDeclaration && symbol.valueDeclaration.kind === 142 /* Parameter */ &&
+                if (symbol.valueDeclaration && symbol.valueDeclaration.kind === 146 /* Parameter */ &&
                     ts.isParameterPropertyDeclaration(symbol.valueDeclaration)) {
-                    result = result.concat(typeChecker.getSymbolsOfParameterPropertyDeclaration(symbol.valueDeclaration, symbol.name));
+                    ts.addRange(result, checker.getSymbolsOfParameterPropertyDeclaration(symbol.valueDeclaration, symbol.name));
                 }
                 // If this is symbol of binding element without propertyName declaration in Object binding pattern
                 // Include the property in the search
-                var bindingElementPropertySymbol = getPropertySymbolOfObjectBindingPatternWithoutPropertyName(symbol);
+                var bindingElementPropertySymbol = getPropertySymbolOfObjectBindingPatternWithoutPropertyName(symbol, checker);
                 if (bindingElementPropertySymbol) {
                     result.push(bindingElementPropertySymbol);
                 }
                 // If this is a union property, add all the symbols from all its source symbols in all unioned types.
                 // If the symbol is an instantiation from a another symbol (e.g. widened symbol) , add the root the list
-                ts.forEach(typeChecker.getRootSymbols(symbol), function (rootSymbol) {
+                for (var _i = 0, _a = checker.getRootSymbols(symbol); _i < _a.length; _i++) {
+                    var rootSymbol = _a[_i];
                     if (rootSymbol !== symbol) {
                         result.push(rootSymbol);
                     }
                     // Add symbol of properties/methods of the same name in base classes and implemented interfaces definitions
                     if (!implementations && rootSymbol.parent && rootSymbol.parent.flags & (32 /* Class */ | 64 /* Interface */)) {
-                        getPropertySymbolsFromBaseTypes(rootSymbol.parent, rootSymbol.getName(), result, /*previousIterationSymbolsCache*/ ts.createMap());
+                        getPropertySymbolsFromBaseTypes(rootSymbol.parent, rootSymbol.getName(), result, /*previousIterationSymbolsCache*/ ts.createMap(), checker);
                     }
-                });
+                }
                 return result;
             }
             /**
@@ -66479,7 +80135,7 @@ var ts;
              * @param previousIterationSymbolsCache a cache of symbol from previous iterations of calling this function to prevent infinite revisiting of the same symbol.
              *                                The value of previousIterationSymbol is undefined when the function is first called.
              */
-            function getPropertySymbolsFromBaseTypes(symbol, propertyName, result, previousIterationSymbolsCache) {
+            function getPropertySymbolsFromBaseTypes(symbol, propertyName, result, previousIterationSymbolsCache, checker) {
                 if (!symbol) {
                     return;
                 }
@@ -66494,7 +80150,7 @@ var ts;
                 // the function will add any found symbol of the property-name, then its sub-routine will call
                 // getPropertySymbolsFromBaseTypes again to walk up any base types to prevent revisiting already
                 // visited symbol, interface "C", the sub-routine will pass the current symbol as previousIterationSymbol.
-                if (symbol.name in previousIterationSymbolsCache) {
+                if (previousIterationSymbolsCache.has(symbol.name)) {
                     return;
                 }
                 if (symbol.flags & (32 /* Class */ | 64 /* Interface */)) {
@@ -66503,7 +80159,7 @@ var ts;
                             getPropertySymbolFromTypeReference(ts.getClassExtendsHeritageClauseElement(declaration));
                             ts.forEach(ts.getClassImplementsHeritageClauseElements(declaration), getPropertySymbolFromTypeReference);
                         }
-                        else if (declaration.kind === 222 /* InterfaceDeclaration */) {
+                        else if (declaration.kind === 230 /* InterfaceDeclaration */) {
                             ts.forEach(ts.getInterfaceBaseTypeNodes(declaration), getPropertySymbolFromTypeReference);
                         }
                     });
@@ -66511,37 +80167,30 @@ var ts;
                 return;
                 function getPropertySymbolFromTypeReference(typeReference) {
                     if (typeReference) {
-                        var type = typeChecker.getTypeAtLocation(typeReference);
+                        var type = checker.getTypeAtLocation(typeReference);
                         if (type) {
-                            var propertySymbol = typeChecker.getPropertyOfType(type, propertyName);
+                            var propertySymbol = checker.getPropertyOfType(type, propertyName);
                             if (propertySymbol) {
-                                result.push.apply(result, typeChecker.getRootSymbols(propertySymbol));
+                                result.push.apply(result, checker.getRootSymbols(propertySymbol));
                             }
                             // Visit the typeReference as well to see if it directly or indirectly use that property
-                            previousIterationSymbolsCache[symbol.name] = symbol;
-                            getPropertySymbolsFromBaseTypes(type.symbol, propertyName, result, previousIterationSymbolsCache);
+                            previousIterationSymbolsCache.set(symbol.name, symbol);
+                            getPropertySymbolsFromBaseTypes(type.symbol, propertyName, result, previousIterationSymbolsCache, checker);
                         }
                     }
                 }
             }
-            function getRelatedSymbol(searchSymbols, referenceSymbol, referenceLocation, searchLocationIsConstructor, parents, cache) {
-                if (ts.contains(searchSymbols, referenceSymbol)) {
-                    // If we are searching for constructor uses, they must be 'new' expressions.
-                    return (!searchLocationIsConstructor || ts.isNewExpressionTarget(referenceLocation)) && referenceSymbol;
-                }
-                // If the reference symbol is an alias, check if what it is aliasing is one of the search
-                // symbols but by looking up for related symbol of this alias so it can handle multiple level of indirectness.
-                var aliasSymbol = getAliasSymbolForPropertyNameSymbol(referenceSymbol, referenceLocation);
-                if (aliasSymbol) {
-                    return getRelatedSymbol(searchSymbols, aliasSymbol, referenceLocation, searchLocationIsConstructor, parents, cache);
+            function getRelatedSymbol(search, referenceSymbol, referenceLocation, state) {
+                if (search.includes(referenceSymbol)) {
+                    return referenceSymbol;
                 }
                 // If the reference location is in an object literal, try to get the contextual type for the
                 // object literal, lookup the property symbol in the contextual type, and use this symbol to
                 // compare to our searchSymbol
-                var containingObjectLiteralElement = getContainingObjectLiteralElement(referenceLocation);
+                var containingObjectLiteralElement = ts.getContainingObjectLiteralElement(referenceLocation);
                 if (containingObjectLiteralElement) {
-                    var contextualSymbol = ts.forEach(getPropertySymbolsFromContextualType(containingObjectLiteralElement), function (contextualSymbol) {
-                        return ts.forEach(typeChecker.getRootSymbols(contextualSymbol), function (s) { return searchSymbols.indexOf(s) >= 0 ? s : undefined; });
+                    var contextualSymbol = ts.forEach(getPropertySymbolsFromContextualType(containingObjectLiteralElement, state.checker), function (contextualSymbol) {
+                        return ts.find(state.checker.getRootSymbols(contextualSymbol), search.includes);
                     });
                     if (contextualSymbol) {
                         return contextualSymbol;
@@ -66550,23 +80199,23 @@ var ts;
                     // Get the property symbol from the object literal's type and look if thats the search symbol
                     // In below eg. get 'property' from type of elems iterating type
                     //      for ( { property: p2 } of elems) { }
-                    var propertySymbol = getPropertySymbolOfDestructuringAssignment(referenceLocation);
-                    if (propertySymbol && searchSymbols.indexOf(propertySymbol) >= 0) {
+                    var propertySymbol = getPropertySymbolOfDestructuringAssignment(referenceLocation, state.checker);
+                    if (propertySymbol && search.includes(propertySymbol)) {
                         return propertySymbol;
                     }
                 }
                 // If the reference location is the binding element and doesn't have property name
                 // then include the binding element in the related symbols
                 //      let { a } : { a };
-                var bindingElementPropertySymbol = getPropertySymbolOfObjectBindingPatternWithoutPropertyName(referenceSymbol);
-                if (bindingElementPropertySymbol && searchSymbols.indexOf(bindingElementPropertySymbol) >= 0) {
+                var bindingElementPropertySymbol = getPropertySymbolOfObjectBindingPatternWithoutPropertyName(referenceSymbol, state.checker);
+                if (bindingElementPropertySymbol && search.includes(bindingElementPropertySymbol)) {
                     return bindingElementPropertySymbol;
                 }
                 // Unwrap symbols to get to the root (e.g. transient symbols as a result of widening)
                 // Or a union property, use its underlying unioned symbols
-                return ts.forEach(typeChecker.getRootSymbols(referenceSymbol), function (rootSymbol) {
+                return ts.forEach(state.checker.getRootSymbols(referenceSymbol), function (rootSymbol) {
                     // if it is in the list, then we are done
-                    if (searchSymbols.indexOf(rootSymbol) >= 0) {
+                    if (search.includes(rootSymbol)) {
                         return rootSymbol;
                     }
                     // Finally, try all properties with the same name in any type the containing type extended or implemented, and
@@ -66574,58 +80223,58 @@ var ts;
                     // parent symbol
                     if (rootSymbol.parent && rootSymbol.parent.flags & (32 /* Class */ | 64 /* Interface */)) {
                         // Parents will only be defined if implementations is true
-                        if (parents) {
-                            if (!ts.forEach(parents, function (parent) { return explicitlyInheritsFrom(rootSymbol.parent, parent, cache); })) {
-                                return undefined;
-                            }
+                        if (search.parents && !ts.some(search.parents, function (parent) { return explicitlyInheritsFrom(rootSymbol.parent, parent, state.inheritsFromCache, state.checker); })) {
+                            return undefined;
                         }
-                        var result_3 = [];
-                        getPropertySymbolsFromBaseTypes(rootSymbol.parent, rootSymbol.getName(), result_3, /*previousIterationSymbolsCache*/ ts.createMap());
-                        return ts.forEach(result_3, function (s) { return searchSymbols.indexOf(s) >= 0 ? s : undefined; });
+                        var result = [];
+                        getPropertySymbolsFromBaseTypes(rootSymbol.parent, rootSymbol.getName(), result, /*previousIterationSymbolsCache*/ ts.createMap(), state.checker);
+                        return ts.find(result, search.includes);
                     }
                     return undefined;
                 });
             }
             function getNameFromObjectLiteralElement(node) {
-                if (node.name.kind === 140 /* ComputedPropertyName */) {
+                if (node.name.kind === 144 /* ComputedPropertyName */) {
                     var nameExpression = node.name.expression;
                     // treat computed property names where expression is string/numeric literal as just string/numeric literal
-                    if (ts.isStringOrNumericLiteral(nameExpression.kind)) {
+                    if (ts.isStringOrNumericLiteral(nameExpression)) {
                         return nameExpression.text;
                     }
                     return undefined;
                 }
                 return node.name.text;
             }
-            function getPropertySymbolsFromContextualType(node) {
+            /** Gets all symbols for one property. Does not get symbols for every property. */
+            function getPropertySymbolsFromContextualType(node, checker) {
                 var objectLiteral = node.parent;
-                var contextualType = typeChecker.getContextualType(objectLiteral);
+                var contextualType = checker.getContextualType(objectLiteral);
                 var name = getNameFromObjectLiteralElement(node);
                 if (name && contextualType) {
-                    var result_4 = [];
-                    var symbol_2 = contextualType.getProperty(name);
-                    if (symbol_2) {
-                        result_4.push(symbol_2);
+                    var result_6 = [];
+                    var symbol = contextualType.getProperty(name);
+                    if (symbol) {
+                        result_6.push(symbol);
                     }
-                    if (contextualType.flags & 524288 /* Union */) {
+                    if (contextualType.flags & 65536 /* Union */) {
                         ts.forEach(contextualType.types, function (t) {
                             var symbol = t.getProperty(name);
                             if (symbol) {
-                                result_4.push(symbol);
+                                result_6.push(symbol);
                             }
                         });
                     }
-                    return result_4;
+                    return result_6;
                 }
                 return undefined;
             }
-            /** Given an initial searchMeaning, extracted from a location, widen the search scope based on the declarations
-                 * of the corresponding symbol. e.g. if we are searching for "Foo" in value position, but "Foo" references a class
-                * then we need to widen the search to include type positions as well.
-                * On the contrary, if we are searching for "Bar" in type position and we trace bar to an interface, and an uninstantiated
-                * module, we want to keep the search limited to only types, as the two declarations (interface and uninstantiated module)
-                * do not intersect in any of the three spaces.
-                */
+            /**
+             * Given an initial searchMeaning, extracted from a location, widen the search scope based on the declarations
+             * of the corresponding symbol. e.g. if we are searching for "Foo" in value position, but "Foo" references a class
+             * then we need to widen the search to include type positions as well.
+             * On the contrary, if we are searching for "Bar" in type position and we trace bar to an interface, and an uninstantiated
+             * module, we want to keep the search limited to only types, as the two declarations (interface and uninstantiated module)
+             * do not intersect in any of the three spaces.
+             */
             function getIntersectingMeaningFromDeclarations(meaning, declarations) {
                 if (declarations) {
                     var lastIterationMeaning = void 0;
@@ -66636,8 +80285,8 @@ var ts;
                         // To achieve that we will keep iterating until the result stabilizes.
                         // Remember the last meaning
                         lastIterationMeaning = meaning;
-                        for (var _i = 0, declarations_8 = declarations; _i < declarations_8.length; _i++) {
-                            var declaration = declarations_8[_i];
+                        for (var _i = 0, declarations_11 = declarations; _i < declarations_11.length; _i++) {
+                            var declaration = declarations_11[_i];
                             var declarationMeaning = ts.getMeaningFromDeclaration(declaration);
                             if (declarationMeaning & meaning) {
                                 meaning |= declarationMeaning;
@@ -66647,143 +80296,93 @@ var ts;
                 }
                 return meaning;
             }
-        }
-        FindAllReferences.getReferencedSymbolsForNode = getReferencedSymbolsForNode;
-        function convertReferences(referenceSymbols) {
-            if (!referenceSymbols) {
-                return undefined;
-            }
-            var referenceEntries = [];
-            for (var _i = 0, referenceSymbols_1 = referenceSymbols; _i < referenceSymbols_1.length; _i++) {
-                var referenceSymbol = referenceSymbols_1[_i];
-                ts.addRange(referenceEntries, referenceSymbol.references);
-            }
-            return referenceEntries;
-        }
-        FindAllReferences.convertReferences = convertReferences;
-        function isImplementation(node) {
-            if (!node) {
-                return false;
-            }
-            else if (ts.isVariableLike(node)) {
-                if (node.initializer) {
-                    return true;
-                }
-                else if (node.kind === 218 /* VariableDeclaration */) {
-                    var parentStatement = getParentStatementOfVariableDeclaration(node);
-                    return parentStatement && ts.hasModifier(parentStatement, 2 /* Ambient */);
+            function isImplementation(node) {
+                if (!node) {
+                    return false;
                 }
-            }
-            else if (ts.isFunctionLike(node)) {
-                return !!node.body || ts.hasModifier(node, 2 /* Ambient */);
-            }
-            else {
-                switch (node.kind) {
-                    case 221 /* ClassDeclaration */:
-                    case 192 /* ClassExpression */:
-                    case 224 /* EnumDeclaration */:
-                    case 225 /* ModuleDeclaration */:
+                else if (ts.isVariableLike(node)) {
+                    if (node.initializer) {
                         return true;
+                    }
+                    else if (node.kind === 226 /* VariableDeclaration */) {
+                        var parentStatement = getParentStatementOfVariableDeclaration(node);
+                        return parentStatement && ts.hasModifier(parentStatement, 2 /* Ambient */);
+                    }
+                }
+                else if (ts.isFunctionLike(node)) {
+                    return !!node.body || ts.hasModifier(node, 2 /* Ambient */);
                 }
+                else {
+                    switch (node.kind) {
+                        case 229 /* ClassDeclaration */:
+                        case 199 /* ClassExpression */:
+                        case 232 /* EnumDeclaration */:
+                        case 233 /* ModuleDeclaration */:
+                            return true;
+                    }
+                }
+                return false;
             }
-            return false;
-        }
-        function getParentStatementOfVariableDeclaration(node) {
-            if (node.parent && node.parent.parent && node.parent.parent.kind === 200 /* VariableStatement */) {
-                ts.Debug.assert(node.parent.kind === 219 /* VariableDeclarationList */);
-                return node.parent.parent;
+            function getParentStatementOfVariableDeclaration(node) {
+                if (node.parent && node.parent.parent && node.parent.parent.kind === 208 /* VariableStatement */) {
+                    ts.Debug.assert(node.parent.kind === 227 /* VariableDeclarationList */);
+                    return node.parent.parent;
+                }
             }
-        }
-        function getReferenceEntriesForShorthandPropertyAssignment(node, typeChecker, result) {
-            var refSymbol = typeChecker.getSymbolAtLocation(node);
-            var shorthandSymbol = typeChecker.getShorthandAssignmentValueSymbol(refSymbol.valueDeclaration);
-            if (shorthandSymbol) {
-                for (var _i = 0, _a = shorthandSymbol.getDeclarations(); _i < _a.length; _i++) {
-                    var declaration = _a[_i];
-                    if (ts.getMeaningFromDeclaration(declaration) & 1 /* Value */) {
-                        result.push(getReferenceEntryFromNode(declaration));
+            function getReferenceEntriesForShorthandPropertyAssignment(node, checker, addReference) {
+                var refSymbol = checker.getSymbolAtLocation(node);
+                var shorthandSymbol = checker.getShorthandAssignmentValueSymbol(refSymbol.valueDeclaration);
+                if (shorthandSymbol) {
+                    for (var _i = 0, _a = shorthandSymbol.getDeclarations(); _i < _a.length; _i++) {
+                        var declaration = _a[_i];
+                        if (ts.getMeaningFromDeclaration(declaration) & 1 /* Value */) {
+                            addReference(declaration);
+                        }
                     }
                 }
             }
-        }
-        FindAllReferences.getReferenceEntriesForShorthandPropertyAssignment = getReferenceEntriesForShorthandPropertyAssignment;
-        function getReferenceEntryFromNode(node) {
-            var start = node.getStart();
-            var end = node.getEnd();
-            if (node.kind === 9 /* StringLiteral */) {
-                start += 1;
-                end -= 1;
+            Core.getReferenceEntriesForShorthandPropertyAssignment = getReferenceEntriesForShorthandPropertyAssignment;
+            function forEachDescendantOfKind(node, kind, action) {
+                ts.forEachChild(node, function (child) {
+                    if (child.kind === kind) {
+                        action(child);
+                    }
+                    forEachDescendantOfKind(child, kind, action);
+                });
             }
-            return {
-                fileName: node.getSourceFile().fileName,
-                textSpan: ts.createTextSpanFromBounds(start, end),
-                isWriteAccess: isWriteAccess(node),
-                isDefinition: ts.isDeclarationName(node) || ts.isLiteralComputedPropertyDeclarationName(node)
-            };
-        }
-        FindAllReferences.getReferenceEntryFromNode = getReferenceEntryFromNode;
-        /** A node is considered a writeAccess iff it is a name of a declaration or a target of an assignment */
-        function isWriteAccess(node) {
-            if (node.kind === 69 /* Identifier */ && ts.isDeclarationName(node)) {
-                return true;
+            /** Get `C` given `N` if `N` is in the position `class C extends N` or `class C extends foo.N` where `N` is an identifier. */
+            function tryGetClassByExtendingIdentifier(node) {
+                return ts.tryGetClassExtendingExpressionWithTypeArguments(ts.climbPastPropertyAccess(node).parent);
             }
-            var parent = node.parent;
-            if (parent) {
-                if (parent.kind === 186 /* PostfixUnaryExpression */ || parent.kind === 185 /* PrefixUnaryExpression */) {
-                    return true;
-                }
-                else if (parent.kind === 187 /* BinaryExpression */ && parent.left === node) {
-                    var operator = parent.operatorToken.kind;
-                    return 56 /* FirstAssignment */ <= operator && operator <= 68 /* LastAssignment */;
+            function isNameOfExternalModuleImportOrDeclaration(node) {
+                if (node.kind === 9 /* StringLiteral */) {
+                    return ts.isNameOfModuleDeclaration(node) || ts.isExpressionOfExternalModuleImportEqualsDeclaration(node);
                 }
+                return false;
             }
-            return false;
-        }
-        function forEachDescendantOfKind(node, kind, action) {
-            ts.forEachChild(node, function (child) {
-                if (child.kind === kind) {
-                    action(child);
+            /**
+             * If we are just looking for implementations and this is a property access expression, we need to get the
+             * symbol of the local type of the symbol the property is being accessed on. This is because our search
+             * symbol may have a different parent symbol if the local type's symbol does not declare the property
+             * being accessed (i.e. it is declared in some parent class or interface)
+             */
+            function getParentSymbolsOfPropertyAccess(location, symbol, checker) {
+                var propertyAccessExpression = getPropertyAccessExpressionFromRightHandSide(location);
+                if (!propertyAccessExpression) {
+                    return undefined;
+                }
+                var localParentType = checker.getTypeAtLocation(propertyAccessExpression.expression);
+                if (!localParentType) {
+                    return undefined;
+                }
+                if (localParentType.symbol && localParentType.symbol.flags & (32 /* Class */ | 64 /* Interface */) && localParentType.symbol !== symbol.parent) {
+                    return [localParentType.symbol];
+                }
+                else if (localParentType.flags & 196608 /* UnionOrIntersection */) {
+                    return getSymbolsForClassAndInterfaceComponents(localParentType);
                 }
-                forEachDescendantOfKind(child, kind, action);
-            });
-        }
-        /**
-         * Returns the containing object literal property declaration given a possible name node, e.g. "a" in x = { "a": 1 }
-         */
-        function getContainingObjectLiteralElement(node) {
-            switch (node.kind) {
-                case 9 /* StringLiteral */:
-                case 8 /* NumericLiteral */:
-                    if (node.parent.kind === 140 /* ComputedPropertyName */) {
-                        return isObjectLiteralPropertyDeclaration(node.parent.parent) ? node.parent.parent : undefined;
-                    }
-                // intential fall through
-                case 69 /* Identifier */:
-                    return isObjectLiteralPropertyDeclaration(node.parent) && node.parent.name === node ? node.parent : undefined;
-            }
-            return undefined;
-        }
-        function isObjectLiteralPropertyDeclaration(node) {
-            switch (node.kind) {
-                case 253 /* PropertyAssignment */:
-                case 254 /* ShorthandPropertyAssignment */:
-                case 147 /* MethodDeclaration */:
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                    return true;
-            }
-            return false;
-        }
-        /** Get `C` given `N` if `N` is in the position `class C extends N` or `class C extends foo.N` where `N` is an identifier. */
-        function tryGetClassByExtendingIdentifier(node) {
-            return ts.tryGetClassExtendingExpressionWithTypeArguments(ts.climbPastPropertyAccess(node).parent);
-        }
-        function isNameOfExternalModuleImportOrDeclaration(node) {
-            if (node.kind === 9 /* StringLiteral */) {
-                return ts.isNameOfModuleDeclaration(node) || ts.isExpressionOfExternalModuleImportEqualsDeclaration(node);
             }
-            return false;
-        }
+        })(Core = FindAllReferences.Core || (FindAllReferences.Core = {}));
     })(FindAllReferences = ts.FindAllReferences || (ts.FindAllReferences = {}));
 })(ts || (ts = {}));
 /* @internal */
@@ -66799,18 +80398,16 @@ var ts;
                 if (referenceFile) {
                     return [getDefinitionInfoForFileReference(comment.fileName, referenceFile.fileName)];
                 }
-                return undefined;
+                // Might still be on jsdoc, so keep looking.
             }
             // Type reference directives
             var typeReferenceDirective = findReferenceInPosition(sourceFile.typeReferenceDirectives, position);
             if (typeReferenceDirective) {
-                var referenceFile = program.getResolvedTypeReferenceDirectives()[typeReferenceDirective.fileName];
-                if (referenceFile && referenceFile.resolvedFileName) {
-                    return [getDefinitionInfoForFileReference(typeReferenceDirective.fileName, referenceFile.resolvedFileName)];
-                }
-                return undefined;
+                var referenceFile = program.getResolvedTypeReferenceDirectives().get(typeReferenceDirective.fileName);
+                return referenceFile && referenceFile.resolvedFileName &&
+                    [getDefinitionInfoForFileReference(typeReferenceDirective.fileName, referenceFile.resolvedFileName)];
             }
-            var node = ts.getTouchingPropertyName(sourceFile, position);
+            var node = ts.getTouchingPropertyName(sourceFile, position, /*includeJsDocComment*/ true);
             if (node === sourceFile) {
                 return undefined;
             }
@@ -66818,7 +80415,7 @@ var ts;
             if (ts.isJumpStatementTarget(node)) {
                 var labelName = node.text;
                 var label = ts.getTargetLabel(node.parent, node.text);
-                return label ? [createDefinitionInfo(label, ts.ScriptElementKind.label, labelName, /*containerName*/ undefined)] : undefined;
+                return label ? [createDefinitionInfoFromName(label, "label" /* label */, labelName, /*containerName*/ undefined)] : undefined;
             }
             var typeChecker = program.getTypeChecker();
             var calledDeclaration = tryGetSignatureDeclaration(typeChecker, node);
@@ -66835,17 +80432,10 @@ var ts;
             // get the aliased symbol instead. This allows for goto def on an import e.g.
             //   import {A, B} from "mod";
             // to jump to the implementation directly.
-            if (symbol.flags & 8388608 /* Alias */) {
-                var declaration = symbol.declarations[0];
-                // Go to the original declaration for cases:
-                //
-                //   (1) when the aliased symbol was declared in the location(parent).
-                //   (2) when the aliased symbol is originating from a named import.
-                //
-                if (node.kind === 69 /* Identifier */ &&
-                    (node.parent === declaration ||
-                        (declaration.kind === 234 /* ImportSpecifier */ && declaration.parent && declaration.parent.kind === 233 /* NamedImports */))) {
-                    symbol = typeChecker.getAliasedSymbol(symbol);
+            if (symbol.flags & 8388608 /* Alias */ && shouldSkipAlias(node, symbol.declarations[0])) {
+                var aliased = typeChecker.getAliasedSymbol(symbol);
+                if (aliased.declarations) {
+                    symbol = aliased;
                 }
             }
             // Because name in short-hand property assignment has two different meanings: property name and property value,
@@ -66853,7 +80443,7 @@ var ts;
             // go to the declaration of the property name (in this case stay at the same position). However, if go-to-definition
             // is performed at the location of property access, we would like to go to definition of the property in the short-hand
             // assignment. This case and others are handled by the following code.
-            if (node.parent.kind === 254 /* ShorthandPropertyAssignment */) {
+            if (node.parent.kind === 262 /* ShorthandPropertyAssignment */) {
                 var shorthandSymbol = typeChecker.getShorthandAssignmentValueSymbol(symbol.valueDeclaration);
                 if (!shorthandSymbol) {
                     return [];
@@ -66864,12 +80454,27 @@ var ts;
                 var shorthandContainerName_1 = typeChecker.symbolToString(symbol.parent, node);
                 return ts.map(shorthandDeclarations, function (declaration) { return createDefinitionInfo(declaration, shorthandSymbolKind_1, shorthandSymbolName_1, shorthandContainerName_1); });
             }
+            // If the current location we want to find its definition is in an object literal, try to get the contextual type for the
+            // object literal, lookup the property symbol in the contextual type, and use this for goto-definition.
+            // For example
+            //      interface Props{
+            //          /*first*/prop1: number
+            //          prop2: boolean
+            //      }
+            //      function Foo(arg: Props) {}
+            //      Foo( { pr/*1*/op1: 10, prop2: true })
+            var element = ts.getContainingObjectLiteralElement(node);
+            if (element && typeChecker.getContextualType(element.parent)) {
+                return ts.flatMap(ts.getPropertySymbolsFromContextualType(typeChecker, element), function (propertySymbol) {
+                    return getDefinitionFromSymbol(typeChecker, propertySymbol, node);
+                });
+            }
             return getDefinitionFromSymbol(typeChecker, symbol, node);
         }
         GoToDefinition.getDefinitionAtPosition = getDefinitionAtPosition;
         /// Goto type
         function getTypeDefinitionAtPosition(typeChecker, sourceFile, position) {
-            var node = ts.getTouchingPropertyName(sourceFile, position);
+            var node = ts.getTouchingPropertyName(sourceFile, position, /*includeJsDocComment*/ true);
             if (node === sourceFile) {
                 return undefined;
             }
@@ -66881,14 +80486,14 @@ var ts;
             if (!type) {
                 return undefined;
             }
-            if (type.flags & 524288 /* Union */ && !(type.flags & 16 /* Enum */)) {
-                var result_5 = [];
+            if (type.flags & 65536 /* Union */ && !(type.flags & 16 /* Enum */)) {
+                var result_7 = [];
                 ts.forEach(type.types, function (t) {
                     if (t.symbol) {
-                        ts.addRange(/*to*/ result_5, /*from*/ getDefinitionFromSymbol(typeChecker, t.symbol, node));
+                        ts.addRange(/*to*/ result_7, /*from*/ getDefinitionFromSymbol(typeChecker, t.symbol, node));
                     }
                 });
-                return result_5;
+                return result_7;
             }
             if (!type.symbol) {
                 return undefined;
@@ -66896,6 +80501,28 @@ var ts;
             return getDefinitionFromSymbol(typeChecker, type.symbol, node);
         }
         GoToDefinition.getTypeDefinitionAtPosition = getTypeDefinitionAtPosition;
+        // Go to the original declaration for cases:
+        //
+        //   (1) when the aliased symbol was declared in the location(parent).
+        //   (2) when the aliased symbol is originating from an import.
+        //
+        function shouldSkipAlias(node, declaration) {
+            if (node.kind !== 71 /* Identifier */) {
+                return false;
+            }
+            if (node.parent === declaration) {
+                return true;
+            }
+            switch (declaration.kind) {
+                case 239 /* ImportClause */:
+                case 237 /* ImportEqualsDeclaration */:
+                    return true;
+                case 242 /* ImportSpecifier */:
+                    return declaration.parent.kind === 241 /* NamedImports */;
+                default:
+                    return false;
+            }
+        }
         function getDefinitionFromSymbol(typeChecker, symbol, node) {
             var result = [];
             var declarations = symbol.getDeclarations();
@@ -66911,14 +80538,13 @@ var ts;
             function tryAddConstructSignature(symbol, location, symbolKind, symbolName, containerName, result) {
                 // Applicable only if we are in a new expression, or we are on a constructor declaration
                 // and in either case the symbol has a construct signature definition, i.e. class
-                if (ts.isNewExpressionTarget(location) || location.kind === 121 /* ConstructorKeyword */) {
+                if (ts.isNewExpressionTarget(location) || location.kind === 123 /* ConstructorKeyword */) {
                     if (symbol.flags & 32 /* Class */) {
                         // Find the first class-like declaration and try to get the construct signature.
                         for (var _i = 0, _a = symbol.getDeclarations(); _i < _a.length; _i++) {
                             var declaration = _a[_i];
                             if (ts.isClassLike(declaration)) {
-                                return tryAddSignature(declaration.members, 
-                                /*selectConstructors*/ true, symbolKind, symbolName, containerName, result);
+                                return tryAddSignature(declaration.members, /*selectConstructors*/ true, symbolKind, symbolName, containerName, result);
                             }
                         }
                         ts.Debug.fail("Expected declaration to have at least one class-like declaration");
@@ -66933,31 +80559,47 @@ var ts;
                 return false;
             }
             function tryAddSignature(signatureDeclarations, selectConstructors, symbolKind, symbolName, containerName, result) {
+                if (!signatureDeclarations) {
+                    return false;
+                }
                 var declarations = [];
                 var definition;
-                ts.forEach(signatureDeclarations, function (d) {
-                    if ((selectConstructors && d.kind === 148 /* Constructor */) ||
-                        (!selectConstructors && (d.kind === 220 /* FunctionDeclaration */ || d.kind === 147 /* MethodDeclaration */ || d.kind === 146 /* MethodSignature */))) {
+                for (var _i = 0, signatureDeclarations_1 = signatureDeclarations; _i < signatureDeclarations_1.length; _i++) {
+                    var d = signatureDeclarations_1[_i];
+                    if (selectConstructors ? d.kind === 152 /* Constructor */ : isSignatureDeclaration(d)) {
                         declarations.push(d);
                         if (d.body)
                             definition = d;
                     }
-                });
-                if (definition) {
-                    result.push(createDefinitionInfo(definition, symbolKind, symbolName, containerName));
-                    return true;
                 }
-                else if (declarations.length) {
-                    result.push(createDefinitionInfo(ts.lastOrUndefined(declarations), symbolKind, symbolName, containerName));
+                if (declarations.length) {
+                    result.push(createDefinitionInfo(definition || ts.lastOrUndefined(declarations), symbolKind, symbolName, containerName));
                     return true;
                 }
                 return false;
             }
         }
+        function isSignatureDeclaration(node) {
+            switch (node.kind) {
+                case 152 /* Constructor */:
+                case 228 /* FunctionDeclaration */:
+                case 151 /* MethodDeclaration */:
+                case 150 /* MethodSignature */:
+                    return true;
+                default:
+                    return false;
+            }
+        }
+        /** Creates a DefinitionInfo from a Declaration, using the declaration's name if possible. */
         function createDefinitionInfo(node, symbolKind, symbolName, containerName) {
+            return createDefinitionInfoFromName(ts.getNameOfDeclaration(node) || node, symbolKind, symbolName, containerName);
+        }
+        /** Creates a DefinitionInfo directly from the name of a declaration. */
+        function createDefinitionInfoFromName(name, symbolKind, symbolName, containerName) {
+            var sourceFile = name.getSourceFile();
             return {
-                fileName: node.getSourceFile().fileName,
-                textSpan: ts.createTextSpanFromBounds(node.getStart(), node.getEnd()),
+                fileName: sourceFile.fileName,
+                textSpan: ts.createTextSpanFromNode(name, sourceFile),
                 kind: symbolKind,
                 name: symbolName,
                 containerKind: undefined,
@@ -66978,7 +80620,7 @@ var ts;
         function findReferenceInPosition(refs, pos) {
             for (var _i = 0, refs_1 = refs; _i < refs_1.length; _i++) {
                 var ref = refs_1[_i];
-                if (ref.pos <= pos && pos < ref.end) {
+                if (ref.pos <= pos && pos <= ref.end) {
                     return ref;
                 }
             }
@@ -66988,7 +80630,7 @@ var ts;
             return {
                 fileName: targetFileName,
                 textSpan: ts.createTextSpanFromBounds(0, 0),
-                kind: ts.ScriptElementKind.scriptElement,
+                kind: "script" /* scriptElement */,
                 name: name,
                 containerName: undefined,
                 containerKind: undefined
@@ -67005,43 +80647,17 @@ var ts;
         }
         function tryGetSignatureDeclaration(typeChecker, node) {
             var callLike = getAncestorCallLikeExpression(node);
-            return callLike && typeChecker.getResolvedSignature(callLike).declaration;
-        }
-    })(GoToDefinition = ts.GoToDefinition || (ts.GoToDefinition = {}));
-})(ts || (ts = {}));
-/* @internal */
-var ts;
-(function (ts) {
-    var GoToImplementation;
-    (function (GoToImplementation) {
-        function getImplementationAtPosition(typeChecker, cancellationToken, sourceFiles, node) {
-            // If invoked directly on a shorthand property assignment, then return
-            // the declaration of the symbol being assigned (not the symbol being assigned to).
-            if (node.parent.kind === 254 /* ShorthandPropertyAssignment */) {
-                var result = [];
-                ts.FindAllReferences.getReferenceEntriesForShorthandPropertyAssignment(node, typeChecker, result);
-                return result.length > 0 ? result : undefined;
-            }
-            else if (node.kind === 95 /* SuperKeyword */ || ts.isSuperProperty(node.parent)) {
-                // References to and accesses on the super keyword only have one possible implementation, so no
-                // need to "Find all References"
-                var symbol = typeChecker.getSymbolAtLocation(node);
-                return symbol.valueDeclaration && [ts.FindAllReferences.getReferenceEntryFromNode(symbol.valueDeclaration)];
-            }
-            else {
-                // Perform "Find all References" and retrieve only those that are implementations
-                var referencedSymbols = ts.FindAllReferences.getReferencedSymbolsForNode(typeChecker, cancellationToken, node, sourceFiles, /*findInStrings*/ false, /*findInComments*/ false, /*implementations*/ true);
-                var result = ts.flatMap(referencedSymbols, function (symbol) {
-                    return ts.map(symbol.references, function (_a) {
-                        var textSpan = _a.textSpan, fileName = _a.fileName;
-                        return ({ textSpan: textSpan, fileName: fileName });
-                    });
-                });
-                return result && result.length > 0 ? result : undefined;
+            var signature = callLike && typeChecker.getResolvedSignature(callLike);
+            if (signature) {
+                var decl = signature.declaration;
+                if (decl && isSignatureDeclaration(decl)) {
+                    return decl;
+                }
             }
+            // Don't go to a function type, go to the value having that type.
+            return undefined;
         }
-        GoToImplementation.getImplementationAtPosition = getImplementationAtPosition;
-    })(GoToImplementation = ts.GoToImplementation || (ts.GoToImplementation = {}));
+    })(GoToDefinition = ts.GoToDefinition || (ts.GoToDefinition = {}));
 })(ts || (ts = {}));
 /* @internal */
 var ts;
@@ -67071,10 +80687,12 @@ var ts;
             "lends",
             "link",
             "memberOf",
+            "method",
             "name",
             "namespace",
             "param",
             "private",
+            "prop",
             "property",
             "public",
             "requires",
@@ -67085,12 +80703,11 @@ var ts;
             "throws",
             "type",
             "typedef",
-            "property",
-            "prop",
             "version"
         ];
-        var jsDocCompletionEntries;
-        function getJsDocCommentsFromDeclarations(declarations, name, canUseParsedParamTagComments) {
+        var jsDocTagNameCompletionEntries;
+        var jsDocTagCompletionEntries;
+        function getJsDocCommentsFromDeclarations(declarations) {
             // Only collect doc comments from duplicate declarations once:
             // In case of a union property there might be same declaration multiple times
             // which only varies in type parameter
@@ -67099,7 +80716,7 @@ var ts;
             // from Array<T> - Array<string> and Array<number>
             var documentationComment = [];
             forEachUnique(declarations, function (declaration) {
-                var comments = ts.getJSDocComments(declaration, /*checkParentVariableStatement*/ true);
+                var comments = ts.getCommentsFromJSDoc(declaration);
                 if (!comments) {
                     return;
                 }
@@ -67116,6 +80733,30 @@ var ts;
             return documentationComment;
         }
         JsDoc.getJsDocCommentsFromDeclarations = getJsDocCommentsFromDeclarations;
+        function getJsDocTagsFromDeclarations(declarations) {
+            // Only collect doc comments from duplicate declarations once.
+            var tags = [];
+            forEachUnique(declarations, function (declaration) {
+                var jsDocs = ts.getJSDocs(declaration);
+                if (!jsDocs) {
+                    return;
+                }
+                for (var _i = 0, jsDocs_1 = jsDocs; _i < jsDocs_1.length; _i++) {
+                    var doc = jsDocs_1[_i];
+                    var tagsForDoc = doc.tags;
+                    if (tagsForDoc) {
+                        tags.push.apply(tags, tagsForDoc.filter(function (tag) { return tag.kind === 284 /* JSDocTag */; }).map(function (jsDocTag) {
+                            return {
+                                name: jsDocTag.tagName.text,
+                                text: jsDocTag.comment
+                            };
+                        }));
+                    }
+                }
+            });
+            return tags;
+        }
+        JsDoc.getJsDocTagsFromDeclarations = getJsDocTagsFromDeclarations;
         /**
          * Iterates through 'array' by index and performs the callback on each element of array until the callback
          * returns a truthy value, then returns that value.
@@ -67123,7 +80764,7 @@ var ts;
          */
         function forEachUnique(array, callback) {
             if (array) {
-                for (var i = 0, len = array.length; i < len; i++) {
+                for (var i = 0; i < array.length; i++) {
                     if (ts.indexOf(array, array[i]) === i) {
                         var result = callback(array[i], i);
                         if (result) {
@@ -67134,17 +80775,46 @@ var ts;
             }
             return undefined;
         }
-        function getAllJsDocCompletionEntries() {
-            return jsDocCompletionEntries || (jsDocCompletionEntries = ts.map(jsDocTagNames, function (tagName) {
+        function getJSDocTagNameCompletions() {
+            return jsDocTagNameCompletionEntries || (jsDocTagNameCompletionEntries = ts.map(jsDocTagNames, function (tagName) {
                 return {
                     name: tagName,
-                    kind: ts.ScriptElementKind.keyword,
+                    kind: "keyword" /* keyword */,
                     kindModifiers: "",
                     sortText: "0",
                 };
             }));
         }
-        JsDoc.getAllJsDocCompletionEntries = getAllJsDocCompletionEntries;
+        JsDoc.getJSDocTagNameCompletions = getJSDocTagNameCompletions;
+        function getJSDocTagCompletions() {
+            return jsDocTagCompletionEntries || (jsDocTagCompletionEntries = ts.map(jsDocTagNames, function (tagName) {
+                return {
+                    name: "@" + tagName,
+                    kind: "keyword" /* keyword */,
+                    kindModifiers: "",
+                    sortText: "0"
+                };
+            }));
+        }
+        JsDoc.getJSDocTagCompletions = getJSDocTagCompletions;
+        function getJSDocParameterNameCompletions(tag) {
+            var nameThusFar = tag.name.text;
+            var jsdoc = tag.parent;
+            var fn = jsdoc.parent;
+            if (!ts.isFunctionLike(fn))
+                return [];
+            return ts.mapDefined(fn.parameters, function (param) {
+                if (!ts.isIdentifier(param.name))
+                    return undefined;
+                var name = param.name.text;
+                if (jsdoc.tags.some(function (t) { return t !== tag && ts.isJSDocParameterTag(t) && t.name.text === name; })
+                    || nameThusFar !== undefined && !ts.startsWith(name, nameThusFar)) {
+                    return undefined;
+                }
+                return { name: name, kind: "parameter" /* parameterElement */, kindModifiers: "", sortText: "0" };
+            });
+        }
+        JsDoc.getJSDocParameterNameCompletions = getJSDocParameterNameCompletions;
         /**
          * Checks if position points to a valid position to add JSDoc comments, and if so,
          * returns the appropriate template. Otherwise returns an empty string.
@@ -67170,7 +80840,7 @@ var ts;
             if (ts.isInString(sourceFile, position) || ts.isInComment(sourceFile, position) || ts.hasDocComment(sourceFile, position)) {
                 return undefined;
             }
-            var tokenAtPos = ts.getTokenAtPosition(sourceFile, position);
+            var tokenAtPos = ts.getTokenAtPosition(sourceFile, position, /*includeJsDocComment*/ false);
             var tokenStart = tokenAtPos.getStart();
             if (!tokenAtPos || tokenStart < position) {
                 return undefined;
@@ -67183,19 +80853,19 @@ var ts;
             var commentOwner;
             findOwner: for (commentOwner = tokenAtPos; commentOwner; commentOwner = commentOwner.parent) {
                 switch (commentOwner.kind) {
-                    case 220 /* FunctionDeclaration */:
-                    case 147 /* MethodDeclaration */:
-                    case 148 /* Constructor */:
-                    case 221 /* ClassDeclaration */:
-                    case 200 /* VariableStatement */:
+                    case 228 /* FunctionDeclaration */:
+                    case 151 /* MethodDeclaration */:
+                    case 152 /* Constructor */:
+                    case 229 /* ClassDeclaration */:
+                    case 208 /* VariableStatement */:
                         break findOwner;
-                    case 256 /* SourceFile */:
+                    case 265 /* SourceFile */:
                         return undefined;
-                    case 225 /* ModuleDeclaration */:
+                    case 233 /* ModuleDeclaration */:
                         // If in walking up the tree, we hit a a nested namespace declaration,
                         // then we must be somewhere within a dotted namespace name; however we don't
                         // want to give back a JSDoc template for the 'b' or 'c' in 'namespace a.b.c { }'.
-                        if (commentOwner.parent.kind === 225 /* ModuleDeclaration */) {
+                        if (commentOwner.parent.kind === 233 /* ModuleDeclaration */) {
                             return undefined;
                         }
                         break findOwner;
@@ -67207,14 +80877,21 @@ var ts;
             var parameters = getParametersForJsDocOwningNode(commentOwner);
             var posLineAndChar = sourceFile.getLineAndCharacterOfPosition(position);
             var lineStart = sourceFile.getLineStarts()[posLineAndChar.line];
-            var indentationStr = sourceFile.text.substr(lineStart, posLineAndChar.character);
+            // replace non-whitespace characters in prefix with spaces.
+            var indentationStr = sourceFile.text.substr(lineStart, posLineAndChar.character).replace(/\S/i, function () { return " "; });
+            var isJavaScriptFile = ts.hasJavaScriptFileExtension(sourceFile.fileName);
             var docParams = "";
-            for (var i = 0, numParams = parameters.length; i < numParams; i++) {
+            for (var i = 0; i < parameters.length; i++) {
                 var currentName = parameters[i].name;
-                var paramName = currentName.kind === 69 /* Identifier */ ?
+                var paramName = currentName.kind === 71 /* Identifier */ ?
                     currentName.text :
                     "param" + i;
-                docParams += indentationStr + " * @param " + paramName + newLine;
+                if (isJavaScriptFile) {
+                    docParams += indentationStr + " * @param {any} " + paramName + newLine;
+                }
+                else {
+                    docParams += indentationStr + " * @param " + paramName + newLine;
+                }
             }
             // A doc comment consists of the following
             // * The opening comment line
@@ -67236,7 +80913,7 @@ var ts;
             if (ts.isFunctionLike(commentOwner)) {
                 return commentOwner.parameters;
             }
-            if (commentOwner.kind === 200 /* VariableStatement */) {
+            if (commentOwner.kind === 208 /* VariableStatement */) {
                 var varStatement = commentOwner;
                 var varDeclarations = varStatement.declarationList.declarations;
                 if (varDeclarations.length === 1 && varDeclarations[0].initializer) {
@@ -67254,17 +80931,17 @@ var ts;
          * @returns the parameters of a signature found on the RHS if one exists; otherwise 'emptyArray'.
          */
         function getParametersFromRightHandSideOfAssignment(rightHandSide) {
-            while (rightHandSide.kind === 178 /* ParenthesizedExpression */) {
+            while (rightHandSide.kind === 185 /* ParenthesizedExpression */) {
                 rightHandSide = rightHandSide.expression;
             }
             switch (rightHandSide.kind) {
-                case 179 /* FunctionExpression */:
-                case 180 /* ArrowFunction */:
+                case 186 /* FunctionExpression */:
+                case 187 /* ArrowFunction */:
                     return rightHandSide.parameters;
-                case 192 /* ClassExpression */:
+                case 199 /* ClassExpression */:
                     for (var _i = 0, _a = rightHandSide.members; _i < _a.length; _i++) {
                         var member = _a[_i];
-                        if (member.kind === 148 /* Constructor */) {
+                        if (member.kind === 152 /* Constructor */) {
                             return member.parameters;
                         }
                     }
@@ -67284,25 +80961,33 @@ var ts;
 (function (ts) {
     var JsTyping;
     (function (JsTyping) {
-        ;
-        ;
         // A map of loose file names to library names
         // that we are confident require typings
         var safeList;
         var EmptySafeList = ts.createMap();
+        /* @internal */
+        JsTyping.nodeCoreModuleList = [
+            "buffer", "querystring", "events", "http", "cluster",
+            "zlib", "os", "https", "punycode", "repl", "readline",
+            "vm", "child_process", "url", "dns", "net",
+            "dgram", "fs", "path", "string_decoder", "tls",
+            "crypto", "stream", "util", "assert", "tty", "domain",
+            "constants", "process", "v8", "timers", "console"
+        ];
+        var nodeCoreModules = ts.arrayToMap(JsTyping.nodeCoreModuleList, function (x) { return x; });
         /**
          * @param host is the object providing I/O related operations.
          * @param fileNames are the file names that belong to the same project
          * @param projectRootPath is the path to the project root directory
          * @param safeListPath is the path used to retrieve the safe list
          * @param packageNameToTypingLocation is the map of package names to their cached typing locations
-         * @param typingOptions are used to customize the typing inference process
+         * @param typeAcquisition is used to customize the typing acquisition process
          * @param compilerOptions are used as a source for typing inference
          */
-        function discoverTypings(host, fileNames, projectRootPath, safeListPath, packageNameToTypingLocation, typingOptions, compilerOptions) {
+        function discoverTypings(host, fileNames, projectRootPath, safeListPath, packageNameToTypingLocation, typeAcquisition, unresolvedImports) {
             // A typing name to typing file path mapping
             var inferredTypings = ts.createMap();
-            if (!typingOptions || !typingOptions.enableAutoDiscovery) {
+            if (!typeAcquisition || !typeAcquisition.enable) {
                 return { cachedTypingPaths: [], newTypingNames: [], filesToWatch: [] };
             }
             // Only infer typings for .js and .jsx files
@@ -67312,16 +80997,16 @@ var ts;
             });
             if (!safeList) {
                 var result = ts.readConfigFile(safeListPath, function (path) { return host.readFile(path); });
-                safeList = result.config ? ts.createMap(result.config) : EmptySafeList;
+                safeList = ts.createMapFromTemplate(result.config);
             }
             var filesToWatch = [];
             // Directories to search for package.json, bower.json and other typing information
             var searchDirs = [];
             var exclude = [];
-            mergeTypings(typingOptions.include);
-            exclude = typingOptions.exclude || [];
+            mergeTypings(typeAcquisition.include);
+            exclude = typeAcquisition.exclude || [];
             var possibleSearchDirs = ts.map(fileNames, ts.getDirectoryPath);
-            if (projectRootPath !== undefined) {
+            if (projectRootPath) {
                 possibleSearchDirs.push(projectRootPath);
             }
             searchDirs = ts.deduplicate(possibleSearchDirs);
@@ -67331,31 +81016,43 @@ var ts;
                 getTypingNamesFromJson(packageJsonPath, filesToWatch);
                 var bowerJsonPath = ts.combinePaths(searchDir, "bower.json");
                 getTypingNamesFromJson(bowerJsonPath, filesToWatch);
+                var bowerComponentsPath = ts.combinePaths(searchDir, "bower_components");
+                getTypingNamesFromPackagesFolder(bowerComponentsPath);
                 var nodeModulesPath = ts.combinePaths(searchDir, "node_modules");
-                getTypingNamesFromNodeModuleFolder(nodeModulesPath);
+                getTypingNamesFromPackagesFolder(nodeModulesPath);
             }
             getTypingNamesFromSourceFileNames(fileNames);
-            // Add the cached typing locations for inferred typings that are already installed
-            for (var name_51 in packageNameToTypingLocation) {
-                if (name_51 in inferredTypings && !inferredTypings[name_51]) {
-                    inferredTypings[name_51] = packageNameToTypingLocation[name_51];
+            // add typings for unresolved imports
+            if (unresolvedImports) {
+                for (var _a = 0, unresolvedImports_1 = unresolvedImports; _a < unresolvedImports_1.length; _a++) {
+                    var moduleId = unresolvedImports_1[_a];
+                    var typingName = nodeCoreModules.has(moduleId) ? "node" : moduleId;
+                    if (!inferredTypings.has(typingName)) {
+                        inferredTypings.set(typingName, undefined);
+                    }
                 }
             }
+            // Add the cached typing locations for inferred typings that are already installed
+            packageNameToTypingLocation.forEach(function (typingLocation, name) {
+                if (inferredTypings.has(name) && inferredTypings.get(name) === undefined) {
+                    inferredTypings.set(name, typingLocation);
+                }
+            });
             // Remove typings that the user has added to the exclude list
-            for (var _a = 0, exclude_1 = exclude; _a < exclude_1.length; _a++) {
-                var excludeTypingName = exclude_1[_a];
-                delete inferredTypings[excludeTypingName];
+            for (var _b = 0, exclude_1 = exclude; _b < exclude_1.length; _b++) {
+                var excludeTypingName = exclude_1[_b];
+                inferredTypings.delete(excludeTypingName);
             }
             var newTypingNames = [];
             var cachedTypingPaths = [];
-            for (var typing in inferredTypings) {
-                if (inferredTypings[typing] !== undefined) {
-                    cachedTypingPaths.push(inferredTypings[typing]);
+            inferredTypings.forEach(function (inferred, typing) {
+                if (inferred !== undefined) {
+                    cachedTypingPaths.push(inferred);
                 }
                 else {
                     newTypingNames.push(typing);
                 }
-            }
+            });
             return { cachedTypingPaths: cachedTypingPaths, newTypingNames: newTypingNames, filesToWatch: filesToWatch };
             /**
              * Merge a given list of typingNames to the inferredTypings map
@@ -67366,8 +81063,8 @@ var ts;
                 }
                 for (var _i = 0, typingNames_1 = typingNames; _i < typingNames_1.length; _i++) {
                     var typing = typingNames_1[_i];
-                    if (!(typing in inferredTypings)) {
-                        inferredTypings[typing] = undefined;
+                    if (!inferredTypings.has(typing)) {
+                        inferredTypings.set(typing, undefined);
                     }
                 }
             }
@@ -67375,22 +81072,22 @@ var ts;
              * Get the typing info from common package manager json files like package.json or bower.json
              */
             function getTypingNamesFromJson(jsonPath, filesToWatch) {
-                var result = ts.readConfigFile(jsonPath, function (path) { return host.readFile(path); });
-                if (result.config) {
-                    var jsonConfig = result.config;
+                if (host.fileExists(jsonPath)) {
                     filesToWatch.push(jsonPath);
-                    if (jsonConfig.dependencies) {
-                        mergeTypings(ts.getOwnKeys(jsonConfig.dependencies));
-                    }
-                    if (jsonConfig.devDependencies) {
-                        mergeTypings(ts.getOwnKeys(jsonConfig.devDependencies));
-                    }
-                    if (jsonConfig.optionalDependencies) {
-                        mergeTypings(ts.getOwnKeys(jsonConfig.optionalDependencies));
-                    }
-                    if (jsonConfig.peerDependencies) {
-                        mergeTypings(ts.getOwnKeys(jsonConfig.peerDependencies));
-                    }
+                }
+                var result = ts.readConfigFile(jsonPath, function (path) { return host.readFile(path); });
+                var jsonConfig = result.config;
+                if (jsonConfig.dependencies) {
+                    mergeTypings(ts.getOwnKeys(jsonConfig.dependencies));
+                }
+                if (jsonConfig.devDependencies) {
+                    mergeTypings(ts.getOwnKeys(jsonConfig.devDependencies));
+                }
+                if (jsonConfig.optionalDependencies) {
+                    mergeTypings(ts.getOwnKeys(jsonConfig.optionalDependencies));
+                }
+                if (jsonConfig.peerDependencies) {
+                    mergeTypings(ts.getOwnKeys(jsonConfig.peerDependencies));
                 }
             }
             /**
@@ -67404,7 +81101,7 @@ var ts;
                 var inferredTypingNames = ts.map(jsFileNames, function (f) { return ts.removeFileExtension(ts.getBaseFileName(f.toLowerCase())); });
                 var cleanedTypingNames = ts.map(inferredTypingNames, function (f) { return f.replace(/((?:\.|-)min(?=\.|$))|((?:-|\.)\d+)/g, ""); });
                 if (safeList !== EmptySafeList) {
-                    mergeTypings(ts.filter(cleanedTypingNames, function (f) { return f in safeList; }));
+                    mergeTypings(ts.mapDefined(cleanedTypingNames, function (f) { return safeList.get(f); }));
                 }
                 var hasJsxFile = ts.forEach(fileNames, function (f) { return ts.ensureScriptKind(f, ts.getScriptKindFromFileName(f)) === 2 /* JSX */; });
                 if (hasJsxFile) {
@@ -67412,31 +81109,30 @@ var ts;
                 }
             }
             /**
-             * Infer typing names from node_module folder
-             * @param nodeModulesPath is the path to the "node_modules" folder
+             * Infer typing names from packages folder (ex: node_module, bower_components)
+             * @param packagesFolderPath is the path to the packages folder
              */
-            function getTypingNamesFromNodeModuleFolder(nodeModulesPath) {
+            function getTypingNamesFromPackagesFolder(packagesFolderPath) {
+                filesToWatch.push(packagesFolderPath);
                 // Todo: add support for ModuleResolutionHost too
-                if (!host.directoryExists(nodeModulesPath)) {
+                if (!host.directoryExists(packagesFolderPath)) {
                     return;
                 }
                 var typingNames = [];
-                var fileNames = host.readDirectory(nodeModulesPath, [".json"], /*excludes*/ undefined, /*includes*/ undefined, /*depth*/ 2);
+                var fileNames = host.readDirectory(packagesFolderPath, [".json"], /*excludes*/ undefined, /*includes*/ undefined, /*depth*/ 2);
                 for (var _i = 0, fileNames_2 = fileNames; _i < fileNames_2.length; _i++) {
                     var fileName = fileNames_2[_i];
                     var normalizedFileName = ts.normalizePath(fileName);
-                    if (ts.getBaseFileName(normalizedFileName) !== "package.json") {
+                    var baseFileName = ts.getBaseFileName(normalizedFileName);
+                    if (baseFileName !== "package.json" && baseFileName !== "bower.json") {
                         continue;
                     }
                     var result = ts.readConfigFile(normalizedFileName, function (path) { return host.readFile(path); });
-                    if (!result.config) {
-                        continue;
-                    }
                     var packageJson = result.config;
                     // npm 3's package.json contains a "_requiredBy" field
                     // we should include all the top level module names for npm 2, and only module names whose
                     // "_requiredBy" field starts with "#" or equals "/" for npm 3.
-                    if (packageJson._requiredBy &&
+                    if (baseFileName === "package.json" && packageJson._requiredBy &&
                         ts.filter(packageJson._requiredBy, function (r) { return r[0] === "#" || r === "/"; }).length === 0) {
                         continue;
                     }
@@ -67447,7 +81143,7 @@ var ts;
                     }
                     if (packageJson.typings) {
                         var absolutePath = ts.getNormalizedAbsolutePath(packageJson.typings, ts.getDirectoryPath(normalizedFileName));
-                        inferredTypings[packageJson.name] = absolutePath;
+                        inferredTypings.set(packageJson.name, absolutePath);
                     }
                     else {
                         typingNames.push(packageJson.name);
@@ -67467,49 +81163,49 @@ var ts;
         function getNavigateToItems(sourceFiles, checker, cancellationToken, searchValue, maxResultCount, excludeDtsFiles) {
             var patternMatcher = ts.createPatternMatcher(searchValue);
             var rawItems = [];
-            // This means "compare in a case insensitive manner."
-            var baseSensitivity = { sensitivity: "base" };
-            // Search the declarations in all files and output matched NavigateToItem into array of NavigateToItem[]
-            ts.forEach(sourceFiles, function (sourceFile) {
+            var _loop_5 = function (sourceFile) {
                 cancellationToken.throwIfCancellationRequested();
-                if (excludeDtsFiles && ts.fileExtensionIs(sourceFile.fileName, ".d.ts")) {
-                    return;
+                if (excludeDtsFiles && ts.fileExtensionIs(sourceFile.fileName, ".d.ts" /* Dts */)) {
+                    return "continue";
                 }
-                var nameToDeclarations = sourceFile.getNamedDeclarations();
-                for (var name_52 in nameToDeclarations) {
-                    var declarations = nameToDeclarations[name_52];
+                ts.forEachEntry(sourceFile.getNamedDeclarations(), function (declarations, name) {
                     if (declarations) {
                         // First do a quick check to see if the name of the declaration matches the
                         // last portion of the (possibly) dotted name they're searching for.
-                        var matches = patternMatcher.getMatchesForLastSegmentOfPattern(name_52);
+                        var matches = patternMatcher.getMatchesForLastSegmentOfPattern(name);
                         if (!matches) {
-                            continue;
+                            return; // continue to next named declarations
                         }
-                        for (var _i = 0, declarations_9 = declarations; _i < declarations_9.length; _i++) {
-                            var declaration = declarations_9[_i];
+                        for (var _i = 0, declarations_12 = declarations; _i < declarations_12.length; _i++) {
+                            var declaration = declarations_12[_i];
                             // It was a match!  If the pattern has dots in it, then also see if the
                             // declaration container matches as well.
                             if (patternMatcher.patternContainsDots) {
                                 var containers = getContainers(declaration);
                                 if (!containers) {
-                                    return undefined;
+                                    return true; // Break out of named declarations and go to the next source file.
                                 }
-                                matches = patternMatcher.getMatches(containers, name_52);
+                                matches = patternMatcher.getMatches(containers, name);
                                 if (!matches) {
-                                    continue;
+                                    return; // continue to next named declarations
                                 }
                             }
                             var fileName = sourceFile.fileName;
                             var matchKind = bestMatchKind(matches);
-                            rawItems.push({ name: name_52, fileName: fileName, matchKind: matchKind, isCaseSensitive: allMatchesAreCaseSensitive(matches), declaration: declaration });
+                            rawItems.push({ name: name, fileName: fileName, matchKind: matchKind, isCaseSensitive: allMatchesAreCaseSensitive(matches), declaration: declaration });
                         }
                     }
-                }
-            });
+                });
+            };
+            // Search the declarations in all files and output matched NavigateToItem into array of NavigateToItem[]
+            for (var _i = 0, sourceFiles_8 = sourceFiles; _i < sourceFiles_8.length; _i++) {
+                var sourceFile = sourceFiles_8[_i];
+                _loop_5(sourceFile);
+            }
             // Remove imports when the imported declaration is already in the list and has the same name.
             rawItems = ts.filter(rawItems, function (item) {
                 var decl = item.declaration;
-                if (decl.kind === 231 /* ImportClause */ || decl.kind === 234 /* ImportSpecifier */ || decl.kind === 229 /* ImportEqualsDeclaration */) {
+                if (decl.kind === 239 /* ImportClause */ || decl.kind === 242 /* ImportSpecifier */ || decl.kind === 237 /* ImportEqualsDeclaration */) {
                     var importer = checker.getSymbolAtLocation(decl.name);
                     var imported = checker.getAliasedSymbol(importer);
                     return importer.name !== imported.name;
@@ -67537,7 +81233,7 @@ var ts;
             }
             function getTextOfIdentifierOrLiteral(node) {
                 if (node) {
-                    if (node.kind === 69 /* Identifier */ ||
+                    if (node.kind === 71 /* Identifier */ ||
                         node.kind === 9 /* StringLiteral */ ||
                         node.kind === 8 /* NumericLiteral */) {
                         return node.text;
@@ -67546,17 +81242,20 @@ var ts;
                 return undefined;
             }
             function tryAddSingleDeclarationName(declaration, containers) {
-                if (declaration && declaration.name) {
-                    var text = getTextOfIdentifierOrLiteral(declaration.name);
-                    if (text !== undefined) {
-                        containers.unshift(text);
-                    }
-                    else if (declaration.name.kind === 140 /* ComputedPropertyName */) {
-                        return tryAddComputedPropertyName(declaration.name.expression, containers, /*includeLastPortion*/ true);
-                    }
-                    else {
-                        // Don't know how to add this.
-                        return false;
+                if (declaration) {
+                    var name_67 = ts.getNameOfDeclaration(declaration);
+                    if (name_67) {
+                        var text = getTextOfIdentifierOrLiteral(name_67);
+                        if (text !== undefined) {
+                            containers.unshift(text);
+                        }
+                        else if (name_67.kind === 144 /* ComputedPropertyName */) {
+                            return tryAddComputedPropertyName(name_67.expression, containers, /*includeLastPortion*/ true);
+                        }
+                        else {
+                            // Don't know how to add this.
+                            return false;
+                        }
                     }
                 }
                 return true;
@@ -67572,7 +81271,7 @@ var ts;
                     }
                     return true;
                 }
-                if (expression.kind === 172 /* PropertyAccessExpression */) {
+                if (expression.kind === 179 /* PropertyAccessExpression */) {
                     var propertyAccess = expression;
                     if (includeLastPortion) {
                         containers.unshift(propertyAccess.name.text);
@@ -67585,8 +81284,9 @@ var ts;
                 var containers = [];
                 // First, if we started with a computed property name, then add all but the last
                 // portion into the container array.
-                if (declaration.name.kind === 140 /* ComputedPropertyName */) {
-                    if (!tryAddComputedPropertyName(declaration.name.expression, containers, /*includeLastPortion*/ false)) {
+                var name = ts.getNameOfDeclaration(declaration);
+                if (name.kind === 144 /* ComputedPropertyName */) {
+                    if (!tryAddComputedPropertyName(name.expression, containers, /*includeLastPortion*/ false)) {
                         return undefined;
                     }
                 }
@@ -67618,12 +81318,13 @@ var ts;
                 // We first sort case insensitively.  So "Aaa" will come before "bar".
                 // Then we sort case sensitively, so "aaa" will come before "Aaa".
                 return i1.matchKind - i2.matchKind ||
-                    i1.name.localeCompare(i2.name, undefined, baseSensitivity) ||
-                    i1.name.localeCompare(i2.name);
+                    ts.compareStringsCaseInsensitive(i1.name, i2.name) ||
+                    ts.compareStrings(i1.name, i2.name);
             }
             function createNavigateToItem(rawItem) {
                 var declaration = rawItem.declaration;
                 var container = ts.getContainerNode(declaration);
+                var containerName = container && ts.getNameOfDeclaration(container);
                 return {
                     name: rawItem.name,
                     kind: ts.getNodeKind(declaration),
@@ -67631,10 +81332,10 @@ var ts;
                     matchKind: ts.PatternMatchKind[rawItem.matchKind],
                     isCaseSensitive: rawItem.isCaseSensitive,
                     fileName: rawItem.fileName,
-                    textSpan: ts.createTextSpanFromBounds(declaration.getStart(), declaration.getEnd()),
+                    textSpan: ts.createTextSpanFromNode(declaration),
                     // TODO(jfreeman): What should be the containerName when the container has a computed name?
-                    containerName: container && container.name ? container.name.text : "",
-                    containerKind: container && container.name ? ts.getNodeKind(container) : ""
+                    containerName: containerName ? containerName.text : "",
+                    containerKind: containerName ? ts.getNodeKind(container) : "" /* unknown */
                 };
             }
         }
@@ -67647,15 +81348,61 @@ var ts;
 (function (ts) {
     var NavigationBar;
     (function (NavigationBar) {
-        function getNavigationBarItems(sourceFile) {
+        /**
+         * Matches all whitespace characters in a string. Eg:
+         *
+         * "app.
+         *
+         * onactivated"
+         *
+         * matches because of the newline, whereas
+         *
+         * "app.onactivated"
+         *
+         * does not match.
+         */
+        var whiteSpaceRegex = /\s+/g;
+        // Keep sourceFile handy so we don't have to search for it every time we need to call `getText`.
+        var curCancellationToken;
+        var curSourceFile;
+        /**
+         * For performance, we keep navigation bar parents on a stack rather than passing them through each recursion.
+         * `parent` is the current parent and is *not* stored in parentsStack.
+         * `startNode` sets a new parent and `endNode` returns to the previous parent.
+         */
+        var parentsStack = [];
+        var parent;
+        // NavigationBarItem requires an array, but will not mutate it, so just give it this for performance.
+        var emptyChildItemArray = [];
+        function getNavigationBarItems(sourceFile, cancellationToken) {
+            curCancellationToken = cancellationToken;
             curSourceFile = sourceFile;
-            var result = ts.map(topLevelItems(rootNavigationBarNode(sourceFile)), convertToTopLevelItem);
-            curSourceFile = undefined;
-            return result;
+            try {
+                return ts.map(topLevelItems(rootNavigationBarNode(sourceFile)), convertToTopLevelItem);
+            }
+            finally {
+                reset();
+            }
         }
         NavigationBar.getNavigationBarItems = getNavigationBarItems;
-        // Keep sourceFile handy so we don't have to search for it every time we need to call `getText`.
-        var curSourceFile;
+        function getNavigationTree(sourceFile, cancellationToken) {
+            curCancellationToken = cancellationToken;
+            curSourceFile = sourceFile;
+            try {
+                return convertToTree(rootNavigationBarNode(sourceFile));
+            }
+            finally {
+                reset();
+            }
+        }
+        NavigationBar.getNavigationTree = getNavigationTree;
+        function reset() {
+            curSourceFile = undefined;
+            curCancellationToken = undefined;
+            parentsStack = [];
+            parent = undefined;
+            emptyChildItemArray = [];
+        }
         function nodeText(node) {
             return node.getText(curSourceFile);
         }
@@ -67670,13 +81417,6 @@ var ts;
                 parent.children = [child];
             }
         }
-        /*
-        For performance, we keep navigation bar parents on a stack rather than passing them through each recursion.
-        `parent` is the current parent and is *not* stored in parentsStack.
-        `startNode` sets a new parent and `endNode` returns to the previous parent.
-        */
-        var parentsStack = [];
-        var parent;
         function rootNavigationBarNode(sourceFile) {
             ts.Debug.assert(!parentsStack.length);
             var root = { node: sourceFile, additionalNodes: undefined, parent: undefined, children: undefined, indent: 0 };
@@ -67727,11 +81467,12 @@ var ts;
         }
         /** Look for navigation bar items in node's subtree, adding them to the current `parent`. */
         function addChildrenRecursively(node) {
+            curCancellationToken.throwIfCancellationRequested();
             if (!node || ts.isToken(node)) {
                 return;
             }
             switch (node.kind) {
-                case 148 /* Constructor */:
+                case 152 /* Constructor */:
                     // Get parameter properties, and treat them as being on the *same* level as the constructor, not under it.
                     var ctr = node;
                     addNodeWithRecursiveChild(ctr, ctr.body);
@@ -67743,21 +81484,21 @@ var ts;
                         }
                     }
                     break;
-                case 147 /* MethodDeclaration */:
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                case 146 /* MethodSignature */:
+                case 151 /* MethodDeclaration */:
+                case 153 /* GetAccessor */:
+                case 154 /* SetAccessor */:
+                case 150 /* MethodSignature */:
                     if (!ts.hasDynamicName(node)) {
                         addNodeWithRecursiveChild(node, node.body);
                     }
                     break;
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
+                case 149 /* PropertyDeclaration */:
+                case 148 /* PropertySignature */:
                     if (!ts.hasDynamicName(node)) {
                         addLeafNode(node);
                     }
                     break;
-                case 231 /* ImportClause */:
+                case 239 /* ImportClause */:
                     var importClause = node;
                     // Handle default import case e.g.:
                     //    import d from "mod";
@@ -67769,7 +81510,7 @@ var ts;
                     //    import {a, b as B} from "mod";
                     var namedBindings = importClause.namedBindings;
                     if (namedBindings) {
-                        if (namedBindings.kind === 232 /* NamespaceImport */) {
+                        if (namedBindings.kind === 240 /* NamespaceImport */) {
                             addLeafNode(namedBindings);
                         }
                         else {
@@ -67780,12 +81521,12 @@ var ts;
                         }
                     }
                     break;
-                case 169 /* BindingElement */:
-                case 218 /* VariableDeclaration */:
+                case 176 /* BindingElement */:
+                case 226 /* VariableDeclaration */:
                     var decl = node;
-                    var name_53 = decl.name;
-                    if (ts.isBindingPattern(name_53)) {
-                        addChildrenRecursively(name_53);
+                    var name_68 = decl.name;
+                    if (ts.isBindingPattern(name_68)) {
+                        addChildrenRecursively(name_68);
                     }
                     else if (decl.initializer && isFunctionOrClassExpression(decl.initializer)) {
                         // For `const x = function() {}`, just use the function node, not the const.
@@ -67795,12 +81536,12 @@ var ts;
                         addNodeWithRecursiveChild(decl, decl.initializer);
                     }
                     break;
-                case 180 /* ArrowFunction */:
-                case 220 /* FunctionDeclaration */:
-                case 179 /* FunctionExpression */:
+                case 187 /* ArrowFunction */:
+                case 228 /* FunctionDeclaration */:
+                case 186 /* FunctionExpression */:
                     addNodeWithRecursiveChild(node, node.body);
                     break;
-                case 224 /* EnumDeclaration */:
+                case 232 /* EnumDeclaration */:
                     startNode(node);
                     for (var _d = 0, _e = node.members; _d < _e.length; _d++) {
                         var member = _e[_d];
@@ -67810,9 +81551,9 @@ var ts;
                     }
                     endNode();
                     break;
-                case 221 /* ClassDeclaration */:
-                case 192 /* ClassExpression */:
-                case 222 /* InterfaceDeclaration */:
+                case 229 /* ClassDeclaration */:
+                case 199 /* ClassExpression */:
+                case 230 /* InterfaceDeclaration */:
                     startNode(node);
                     for (var _f = 0, _g = node.members; _f < _g.length; _f++) {
                         var member = _g[_f];
@@ -67820,21 +81561,21 @@ var ts;
                     }
                     endNode();
                     break;
-                case 225 /* ModuleDeclaration */:
+                case 233 /* ModuleDeclaration */:
                     addNodeWithRecursiveChild(node, getInteriorModule(node).body);
                     break;
-                case 238 /* ExportSpecifier */:
-                case 229 /* ImportEqualsDeclaration */:
-                case 153 /* IndexSignature */:
-                case 151 /* CallSignature */:
-                case 152 /* ConstructSignature */:
-                case 223 /* TypeAliasDeclaration */:
+                case 246 /* ExportSpecifier */:
+                case 237 /* ImportEqualsDeclaration */:
+                case 157 /* IndexSignature */:
+                case 155 /* CallSignature */:
+                case 156 /* ConstructSignature */:
+                case 231 /* TypeAliasDeclaration */:
                     addLeafNode(node);
                     break;
                 default:
-                    ts.forEach(node.jsDocComments, function (jsDocComment) {
-                        ts.forEach(jsDocComment.tags, function (tag) {
-                            if (tag.kind === 279 /* JSDocTypedefTag */) {
+                    ts.forEach(node.jsDoc, function (jsDoc) {
+                        ts.forEach(jsDoc.tags, function (tag) {
+                            if (tag.kind === 291 /* JSDocTypedefTag */) {
                                 addLeafNode(tag);
                             }
                         });
@@ -67846,15 +81587,15 @@ var ts;
         function mergeChildren(children) {
             var nameToItems = ts.createMap();
             ts.filterMutate(children, function (child) {
-                var decl = child.node;
-                var name = decl.name && nodeText(decl.name);
+                var declName = ts.getNameOfDeclaration(child.node);
+                var name = declName && nodeText(declName);
                 if (!name) {
                     // Anonymous items are never merged.
                     return true;
                 }
-                var itemsWithSameName = nameToItems[name];
+                var itemsWithSameName = nameToItems.get(name);
                 if (!itemsWithSameName) {
-                    nameToItems[name] = child;
+                    nameToItems.set(name, child);
                     return true;
                 }
                 if (itemsWithSameName instanceof Array) {
@@ -67872,7 +81613,7 @@ var ts;
                     if (tryMerge(itemWithSameName, child)) {
                         return false;
                     }
-                    nameToItems[name] = [itemWithSameName, child];
+                    nameToItems.set(name, [itemWithSameName, child]);
                     return true;
                 }
                 function tryMerge(a, b) {
@@ -67885,14 +81626,14 @@ var ts;
             });
             /** a and b have the same name, but they may not be mergeable. */
             function shouldReallyMerge(a, b) {
-                return a.kind === b.kind && (a.kind !== 225 /* ModuleDeclaration */ || areSameModule(a, b));
+                return a.kind === b.kind && (a.kind !== 233 /* ModuleDeclaration */ || areSameModule(a, b));
                 // We use 1 NavNode to represent 'A.B.C', but there are multiple source nodes.
                 // Only merge module nodes that have the same chain. Don't merge 'A.B.C' with 'A'!
                 function areSameModule(a, b) {
                     if (a.body.kind !== b.body.kind) {
                         return false;
                     }
-                    if (a.body.kind !== 225 /* ModuleDeclaration */) {
+                    if (a.body.kind !== 233 /* ModuleDeclaration */) {
                         return true;
                     }
                     return areSameModule(a.body, b.body);
@@ -67920,63 +81661,42 @@ var ts;
         function compareChildren(child1, child2) {
             var name1 = tryGetName(child1.node), name2 = tryGetName(child2.node);
             if (name1 && name2) {
-                var cmp = localeCompareFix(name1, name2);
+                var cmp = ts.compareStringsCaseInsensitive(name1, name2);
                 return cmp !== 0 ? cmp : navigationBarNodeKind(child1) - navigationBarNodeKind(child2);
             }
             else {
                 return name1 ? 1 : name2 ? -1 : navigationBarNodeKind(child1) - navigationBarNodeKind(child2);
             }
         }
-        // More efficient to create a collator once and use its `compare` than to call `a.localeCompare(b)` many times.
-        var collator = typeof Intl === "undefined" ? undefined : new Intl.Collator();
-        // Intl is missing in Safari, and node 0.10 treats "a" as greater than "B".
-        var localeCompareIsCorrect = collator && collator.compare("a", "B") < 0;
-        var localeCompareFix = localeCompareIsCorrect ? collator.compare : function (a, b) {
-            // This isn't perfect, but it passes all of our tests.
-            for (var i = 0; i < Math.min(a.length, b.length); i++) {
-                var chA = a.charAt(i), chB = b.charAt(i);
-                if (chA === "\"" && chB === "'") {
-                    return 1;
-                }
-                if (chA === "'" && chB === "\"") {
-                    return -1;
-                }
-                var cmp = chA.toLocaleLowerCase().localeCompare(chB.toLocaleLowerCase());
-                if (cmp !== 0) {
-                    return cmp;
-                }
-            }
-            return a.length - b.length;
-        };
         /**
          * This differs from getItemName because this is just used for sorting.
          * We only sort nodes by name that have a more-or-less "direct" name, as opposed to `new()` and the like.
          * So `new()` can still come before an `aardvark` method.
          */
         function tryGetName(node) {
-            if (node.kind === 225 /* ModuleDeclaration */) {
+            if (node.kind === 233 /* ModuleDeclaration */) {
                 return getModuleName(node);
             }
-            var decl = node;
-            if (decl.name) {
-                return ts.getPropertyNameForPropertyNameNode(decl.name);
+            var declName = ts.getNameOfDeclaration(node);
+            if (declName) {
+                return ts.getPropertyNameForPropertyNameNode(declName);
             }
             switch (node.kind) {
-                case 179 /* FunctionExpression */:
-                case 180 /* ArrowFunction */:
-                case 192 /* ClassExpression */:
+                case 186 /* FunctionExpression */:
+                case 187 /* ArrowFunction */:
+                case 199 /* ClassExpression */:
                     return getFunctionOrClassName(node);
-                case 279 /* JSDocTypedefTag */:
+                case 291 /* JSDocTypedefTag */:
                     return getJSDocTypedefTagName(node);
                 default:
                     return undefined;
             }
         }
         function getItemName(node) {
-            if (node.kind === 225 /* ModuleDeclaration */) {
+            if (node.kind === 233 /* ModuleDeclaration */) {
                 return getModuleName(node);
             }
-            var name = node.name;
+            var name = ts.getNameOfDeclaration(node);
             if (name) {
                 var text = nodeText(name);
                 if (text.length > 0) {
@@ -67984,29 +81704,32 @@ var ts;
                 }
             }
             switch (node.kind) {
-                case 256 /* SourceFile */:
+                case 265 /* SourceFile */:
                     var sourceFile = node;
                     return ts.isExternalModule(sourceFile)
                         ? "\"" + ts.escapeString(ts.getBaseFileName(ts.removeFileExtension(ts.normalizePath(sourceFile.fileName)))) + "\""
                         : "<global>";
-                case 180 /* ArrowFunction */:
-                case 220 /* FunctionDeclaration */:
-                case 179 /* FunctionExpression */:
-                case 221 /* ClassDeclaration */:
-                case 192 /* ClassExpression */:
+                case 187 /* ArrowFunction */:
+                case 228 /* FunctionDeclaration */:
+                case 186 /* FunctionExpression */:
+                case 229 /* ClassDeclaration */:
+                case 199 /* ClassExpression */:
                     if (ts.getModifierFlags(node) & 512 /* Default */) {
                         return "default";
                     }
+                    // We may get a string with newlines or other whitespace in the case of an object dereference
+                    // (eg: "app\n.onactivated"), so we should remove the whitespace for readabiltiy in the
+                    // navigation bar.
                     return getFunctionOrClassName(node);
-                case 148 /* Constructor */:
+                case 152 /* Constructor */:
                     return "constructor";
-                case 152 /* ConstructSignature */:
+                case 156 /* ConstructSignature */:
                     return "new()";
-                case 151 /* CallSignature */:
+                case 155 /* CallSignature */:
                     return "()";
-                case 153 /* IndexSignature */:
+                case 157 /* IndexSignature */:
                     return "[]";
-                case 279 /* JSDocTypedefTag */:
+                case 291 /* JSDocTypedefTag */:
                     return getJSDocTypedefTagName(node);
                 default:
                     return "<unknown>";
@@ -68018,10 +81741,10 @@ var ts;
             }
             else {
                 var parentNode = node.parent && node.parent.parent;
-                if (parentNode && parentNode.kind === 200 /* VariableStatement */) {
+                if (parentNode && parentNode.kind === 208 /* VariableStatement */) {
                     if (parentNode.declarationList.declarations.length > 0) {
                         var nameIdentifier = parentNode.declarationList.declarations[0].name;
-                        if (nameIdentifier.kind === 69 /* Identifier */) {
+                        if (nameIdentifier.kind === 71 /* Identifier */) {
                             return nameIdentifier.text;
                         }
                     }
@@ -68047,24 +81770,24 @@ var ts;
             return topLevel;
             function isTopLevel(item) {
                 switch (navigationBarNodeKind(item)) {
-                    case 221 /* ClassDeclaration */:
-                    case 192 /* ClassExpression */:
-                    case 224 /* EnumDeclaration */:
-                    case 222 /* InterfaceDeclaration */:
-                    case 225 /* ModuleDeclaration */:
-                    case 256 /* SourceFile */:
-                    case 223 /* TypeAliasDeclaration */:
-                    case 279 /* JSDocTypedefTag */:
+                    case 229 /* ClassDeclaration */:
+                    case 199 /* ClassExpression */:
+                    case 232 /* EnumDeclaration */:
+                    case 230 /* InterfaceDeclaration */:
+                    case 233 /* ModuleDeclaration */:
+                    case 265 /* SourceFile */:
+                    case 231 /* TypeAliasDeclaration */:
+                    case 291 /* JSDocTypedefTag */:
                         return true;
-                    case 148 /* Constructor */:
-                    case 147 /* MethodDeclaration */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                    case 218 /* VariableDeclaration */:
+                    case 152 /* Constructor */:
+                    case 151 /* MethodDeclaration */:
+                    case 153 /* GetAccessor */:
+                    case 154 /* SetAccessor */:
+                    case 226 /* VariableDeclaration */:
                         return hasSomeImportantChild(item);
-                    case 180 /* ArrowFunction */:
-                    case 220 /* FunctionDeclaration */:
-                    case 179 /* FunctionExpression */:
+                    case 187 /* ArrowFunction */:
+                    case 228 /* FunctionDeclaration */:
+                    case 186 /* FunctionExpression */:
                         return isTopLevelFunctionDeclaration(item);
                     default:
                         return false;
@@ -68074,10 +81797,10 @@ var ts;
                         return false;
                     }
                     switch (navigationBarNodeKind(item.parent)) {
-                        case 226 /* ModuleBlock */:
-                        case 256 /* SourceFile */:
-                        case 147 /* MethodDeclaration */:
-                        case 148 /* Constructor */:
+                        case 234 /* ModuleBlock */:
+                        case 265 /* SourceFile */:
+                        case 151 /* MethodDeclaration */:
+                        case 152 /* Constructor */:
                             return true;
                         default:
                             return hasSomeImportantChild(item);
@@ -68086,18 +81809,25 @@ var ts;
                 function hasSomeImportantChild(item) {
                     return ts.forEach(item.children, function (child) {
                         var childKind = navigationBarNodeKind(child);
-                        return childKind !== 218 /* VariableDeclaration */ && childKind !== 169 /* BindingElement */;
+                        return childKind !== 226 /* VariableDeclaration */ && childKind !== 176 /* BindingElement */;
                     });
                 }
             }
         }
-        // NavigationBarItem requires an array, but will not mutate it, so just give it this for performance.
-        var emptyChildItemArray = [];
+        function convertToTree(n) {
+            return {
+                text: getItemName(n.node),
+                kind: ts.getNodeKind(n.node),
+                kindModifiers: getModifiers(n.node),
+                spans: getSpans(n),
+                childItems: ts.map(n.children, convertToTree)
+            };
+        }
         function convertToTopLevelItem(n) {
             return {
                 text: getItemName(n.node),
                 kind: ts.getNodeKind(n.node),
-                kindModifiers: ts.getNodeModifiers(n.node),
+                kindModifiers: getModifiers(n.node),
                 spans: getSpans(n),
                 childItems: ts.map(n.children, convertToChildItem) || emptyChildItemArray,
                 indent: n.indent,
@@ -68116,16 +81846,16 @@ var ts;
                     grayed: false
                 };
             }
-            function getSpans(n) {
-                var spans = [getNodeSpan(n.node)];
-                if (n.additionalNodes) {
-                    for (var _i = 0, _a = n.additionalNodes; _i < _a.length; _i++) {
-                        var node = _a[_i];
-                        spans.push(getNodeSpan(node));
-                    }
+        }
+        function getSpans(n) {
+            var spans = [getNodeSpan(n.node)];
+            if (n.additionalNodes) {
+                for (var _i = 0, _a = n.additionalNodes; _i < _a.length; _i++) {
+                    var node = _a[_i];
+                    spans.push(getNodeSpan(node));
                 }
-                return spans;
             }
+            return spans;
         }
         function getModuleName(moduleDeclaration) {
             // We want to maintain quotation marks.
@@ -68135,7 +81865,7 @@ var ts;
             // Otherwise, we need to aggregate each identifier to build up the qualified name.
             var result = [];
             result.push(moduleDeclaration.name.text);
-            while (moduleDeclaration.body && moduleDeclaration.body.kind === 225 /* ModuleDeclaration */) {
+            while (moduleDeclaration.body && moduleDeclaration.body.kind === 233 /* ModuleDeclaration */) {
                 moduleDeclaration = moduleDeclaration.body;
                 result.push(moduleDeclaration.name.text);
             }
@@ -68146,28 +81876,34 @@ var ts;
          * We store 'A' as associated with a NavNode, and use getModuleName to traverse down again.
          */
         function getInteriorModule(decl) {
-            return decl.body.kind === 225 /* ModuleDeclaration */ ? getInteriorModule(decl.body) : decl;
+            return decl.body.kind === 233 /* ModuleDeclaration */ ? getInteriorModule(decl.body) : decl;
         }
         function isComputedProperty(member) {
-            return !member.name || member.name.kind === 140 /* ComputedPropertyName */;
+            return !member.name || member.name.kind === 144 /* ComputedPropertyName */;
         }
         function getNodeSpan(node) {
-            return node.kind === 256 /* SourceFile */
+            return node.kind === 265 /* SourceFile */
                 ? ts.createTextSpanFromBounds(node.getFullStart(), node.getEnd())
-                : ts.createTextSpanFromBounds(node.getStart(curSourceFile), node.getEnd());
+                : ts.createTextSpanFromNode(node, curSourceFile);
+        }
+        function getModifiers(node) {
+            if (node.parent && node.parent.kind === 226 /* VariableDeclaration */) {
+                node = node.parent;
+            }
+            return ts.getNodeModifiers(node);
         }
         function getFunctionOrClassName(node) {
             if (node.name && ts.getFullWidth(node.name) > 0) {
                 return ts.declarationNameToString(node.name);
             }
-            else if (node.parent.kind === 218 /* VariableDeclaration */) {
+            else if (node.parent.kind === 226 /* VariableDeclaration */) {
                 return ts.declarationNameToString(node.parent.name);
             }
-            else if (node.parent.kind === 187 /* BinaryExpression */ &&
-                node.parent.operatorToken.kind === 56 /* EqualsToken */) {
-                return nodeText(node.parent.left);
+            else if (node.parent.kind === 194 /* BinaryExpression */ &&
+                node.parent.operatorToken.kind === 58 /* EqualsToken */) {
+                return nodeText(node.parent.left).replace(whiteSpaceRegex, "");
             }
-            else if (node.parent.kind === 253 /* PropertyAssignment */ && node.parent.name) {
+            else if (node.parent.kind === 261 /* PropertyAssignment */ && node.parent.name) {
                 return nodeText(node.parent.name);
             }
             else if (ts.getModifierFlags(node) & 512 /* Default */) {
@@ -68178,7 +81914,7 @@ var ts;
             }
         }
         function isFunctionOrClassExpression(node) {
-            return node.kind === 179 /* FunctionExpression */ || node.kind === 180 /* ArrowFunction */ || node.kind === 192 /* ClassExpression */;
+            return node.kind === 186 /* FunctionExpression */ || node.kind === 187 /* ArrowFunction */ || node.kind === 199 /* ClassExpression */;
         }
     })(NavigationBar = ts.NavigationBar || (ts.NavigationBar = {}));
 })(ts || (ts = {}));
@@ -68187,29 +81923,29 @@ var ts;
 (function (ts) {
     var OutliningElementsCollector;
     (function (OutliningElementsCollector) {
-        function collectElements(sourceFile) {
+        function collectElements(sourceFile, cancellationToken) {
             var elements = [];
             var collapseText = "...";
             function addOutliningSpan(hintSpanNode, startElement, endElement, autoCollapse) {
                 if (hintSpanNode && startElement && endElement) {
-                    var span_12 = {
+                    var span_13 = {
                         textSpan: ts.createTextSpanFromBounds(startElement.pos, endElement.end),
-                        hintSpan: ts.createTextSpanFromBounds(hintSpanNode.getStart(), hintSpanNode.end),
+                        hintSpan: ts.createTextSpanFromNode(hintSpanNode, sourceFile),
                         bannerText: collapseText,
                         autoCollapse: autoCollapse
                     };
-                    elements.push(span_12);
+                    elements.push(span_13);
                 }
             }
             function addOutliningSpanComments(commentSpan, autoCollapse) {
                 if (commentSpan) {
-                    var span_13 = {
+                    var span_14 = {
                         textSpan: ts.createTextSpanFromBounds(commentSpan.pos, commentSpan.end),
                         hintSpan: ts.createTextSpanFromBounds(commentSpan.pos, commentSpan.end),
                         bannerText: collapseText,
                         autoCollapse: autoCollapse
                     };
-                    elements.push(span_13);
+                    elements.push(span_14);
                 }
             }
             function addOutliningForLeadingCommentsForNode(n) {
@@ -68221,6 +81957,7 @@ var ts;
                     var singleLineCommentCount = 0;
                     for (var _i = 0, comments_4 = comments; _i < comments_4.length; _i++) {
                         var currentComment = comments_4[_i];
+                        cancellationToken.throwIfCancellationRequested();
                         // For single line comments, combine consecutive ones (2 or more) into
                         // a single span from the start of the first till the end of the last
                         if (currentComment.kind === 2 /* SingleLineCommentTrivia */) {
@@ -68246,19 +81983,20 @@ var ts;
                 // Only outline spans of two or more consecutive single line comments
                 if (count > 1) {
                     var multipleSingleLineComments = {
+                        kind: 2 /* SingleLineCommentTrivia */,
                         pos: start,
                         end: end,
-                        kind: 2 /* SingleLineCommentTrivia */
                     };
                     addOutliningSpanComments(multipleSingleLineComments, /*autoCollapse*/ false);
                 }
             }
             function autoCollapse(node) {
-                return ts.isFunctionBlock(node) && node.parent.kind !== 180 /* ArrowFunction */;
+                return ts.isFunctionBlock(node) && node.parent.kind !== 187 /* ArrowFunction */;
             }
             var depth = 0;
             var maxDepth = 20;
             function walk(n) {
+                cancellationToken.throwIfCancellationRequested();
                 if (depth > maxDepth) {
                     return;
                 }
@@ -68266,71 +82004,72 @@ var ts;
                     addOutliningForLeadingCommentsForNode(n);
                 }
                 switch (n.kind) {
-                    case 199 /* Block */:
+                    case 207 /* Block */:
                         if (!ts.isFunctionBlock(n)) {
-                            var parent_22 = n.parent;
-                            var openBrace = ts.findChildOfKind(n, 15 /* OpenBraceToken */, sourceFile);
-                            var closeBrace = ts.findChildOfKind(n, 16 /* CloseBraceToken */, sourceFile);
+                            var parent_24 = n.parent;
+                            var openBrace = ts.findChildOfKind(n, 17 /* OpenBraceToken */, sourceFile);
+                            var closeBrace = ts.findChildOfKind(n, 18 /* CloseBraceToken */, sourceFile);
                             // Check if the block is standalone, or 'attached' to some parent statement.
                             // If the latter, we want to collapse the block, but consider its hint span
                             // to be the entire span of the parent.
-                            if (parent_22.kind === 204 /* DoStatement */ ||
-                                parent_22.kind === 207 /* ForInStatement */ ||
-                                parent_22.kind === 208 /* ForOfStatement */ ||
-                                parent_22.kind === 206 /* ForStatement */ ||
-                                parent_22.kind === 203 /* IfStatement */ ||
-                                parent_22.kind === 205 /* WhileStatement */ ||
-                                parent_22.kind === 212 /* WithStatement */ ||
-                                parent_22.kind === 252 /* CatchClause */) {
-                                addOutliningSpan(parent_22, openBrace, closeBrace, autoCollapse(n));
+                            if (parent_24.kind === 212 /* DoStatement */ ||
+                                parent_24.kind === 215 /* ForInStatement */ ||
+                                parent_24.kind === 216 /* ForOfStatement */ ||
+                                parent_24.kind === 214 /* ForStatement */ ||
+                                parent_24.kind === 211 /* IfStatement */ ||
+                                parent_24.kind === 213 /* WhileStatement */ ||
+                                parent_24.kind === 220 /* WithStatement */ ||
+                                parent_24.kind === 260 /* CatchClause */) {
+                                addOutliningSpan(parent_24, openBrace, closeBrace, autoCollapse(n));
                                 break;
                             }
-                            if (parent_22.kind === 216 /* TryStatement */) {
+                            if (parent_24.kind === 224 /* TryStatement */) {
                                 // Could be the try-block, or the finally-block.
-                                var tryStatement = parent_22;
+                                var tryStatement = parent_24;
                                 if (tryStatement.tryBlock === n) {
-                                    addOutliningSpan(parent_22, openBrace, closeBrace, autoCollapse(n));
+                                    addOutliningSpan(parent_24, openBrace, closeBrace, autoCollapse(n));
                                     break;
                                 }
                                 else if (tryStatement.finallyBlock === n) {
-                                    var finallyKeyword = ts.findChildOfKind(tryStatement, 85 /* FinallyKeyword */, sourceFile);
+                                    var finallyKeyword = ts.findChildOfKind(tryStatement, 87 /* FinallyKeyword */, sourceFile);
                                     if (finallyKeyword) {
                                         addOutliningSpan(finallyKeyword, openBrace, closeBrace, autoCollapse(n));
                                         break;
                                     }
                                 }
+                                // fall through.
                             }
                             // Block was a standalone block.  In this case we want to only collapse
                             // the span of the block, independent of any parent span.
-                            var span_14 = ts.createTextSpanFromBounds(n.getStart(), n.end);
+                            var span_15 = ts.createTextSpanFromNode(n);
                             elements.push({
-                                textSpan: span_14,
-                                hintSpan: span_14,
+                                textSpan: span_15,
+                                hintSpan: span_15,
                                 bannerText: collapseText,
                                 autoCollapse: autoCollapse(n)
                             });
                             break;
                         }
-                    // Fallthrough.
-                    case 226 /* ModuleBlock */: {
-                        var openBrace = ts.findChildOfKind(n, 15 /* OpenBraceToken */, sourceFile);
-                        var closeBrace = ts.findChildOfKind(n, 16 /* CloseBraceToken */, sourceFile);
+                    // falls through
+                    case 234 /* ModuleBlock */: {
+                        var openBrace = ts.findChildOfKind(n, 17 /* OpenBraceToken */, sourceFile);
+                        var closeBrace = ts.findChildOfKind(n, 18 /* CloseBraceToken */, sourceFile);
                         addOutliningSpan(n.parent, openBrace, closeBrace, autoCollapse(n));
                         break;
                     }
-                    case 221 /* ClassDeclaration */:
-                    case 222 /* InterfaceDeclaration */:
-                    case 224 /* EnumDeclaration */:
-                    case 171 /* ObjectLiteralExpression */:
-                    case 227 /* CaseBlock */: {
-                        var openBrace = ts.findChildOfKind(n, 15 /* OpenBraceToken */, sourceFile);
-                        var closeBrace = ts.findChildOfKind(n, 16 /* CloseBraceToken */, sourceFile);
+                    case 229 /* ClassDeclaration */:
+                    case 230 /* InterfaceDeclaration */:
+                    case 232 /* EnumDeclaration */:
+                    case 178 /* ObjectLiteralExpression */:
+                    case 235 /* CaseBlock */: {
+                        var openBrace = ts.findChildOfKind(n, 17 /* OpenBraceToken */, sourceFile);
+                        var closeBrace = ts.findChildOfKind(n, 18 /* CloseBraceToken */, sourceFile);
                         addOutliningSpan(n, openBrace, closeBrace, autoCollapse(n));
                         break;
                     }
-                    case 170 /* ArrayLiteralExpression */:
-                        var openBracket = ts.findChildOfKind(n, 19 /* OpenBracketToken */, sourceFile);
-                        var closeBracket = ts.findChildOfKind(n, 20 /* CloseBracketToken */, sourceFile);
+                    case 177 /* ArrayLiteralExpression */:
+                        var openBracket = ts.findChildOfKind(n, 21 /* OpenBracketToken */, sourceFile);
+                        var closeBracket = ts.findChildOfKind(n, 22 /* CloseBracketToken */, sourceFile);
                         addOutliningSpan(n, openBracket, closeBracket, autoCollapse(n));
                         break;
                 }
@@ -68348,13 +82087,13 @@ var ts;
 var ts;
 (function (ts) {
     // Note(cyrusn): this enum is ordered from strongest match type to weakest match type.
+    var PatternMatchKind;
     (function (PatternMatchKind) {
         PatternMatchKind[PatternMatchKind["exact"] = 0] = "exact";
         PatternMatchKind[PatternMatchKind["prefix"] = 1] = "prefix";
         PatternMatchKind[PatternMatchKind["substring"] = 2] = "substring";
         PatternMatchKind[PatternMatchKind["camelCase"] = 3] = "camelCase";
-    })(ts.PatternMatchKind || (ts.PatternMatchKind = {}));
-    var PatternMatchKind = ts.PatternMatchKind;
+    })(PatternMatchKind = ts.PatternMatchKind || (ts.PatternMatchKind = {}));
     function createPatternMatch(kind, punctuationStripped, isCaseSensitive, camelCaseWeight) {
         return {
             kind: kind,
@@ -68424,10 +82163,11 @@ var ts;
             return totalMatch;
         }
         function getWordSpans(word) {
-            if (!(word in stringToWordSpans)) {
-                stringToWordSpans[word] = breakIntoWordSpans(word);
+            var spans = stringToWordSpans.get(word);
+            if (!spans) {
+                stringToWordSpans.set(word, spans = breakIntoWordSpans(word));
             }
-            return stringToWordSpans[word];
+            return spans;
         }
         function matchTextChunk(candidate, chunk, punctuationStripped) {
             var index = indexOfIgnoringCase(candidate, chunk.textLowerCase);
@@ -68455,10 +82195,10 @@ var ts;
                     //    But we would match 'FooAttribute' (since 'Attribute' starts with 'a').
                     var wordSpans = getWordSpans(candidate);
                     for (var _i = 0, wordSpans_1 = wordSpans; _i < wordSpans_1.length; _i++) {
-                        var span_15 = wordSpans_1[_i];
-                        if (partStartsWith(candidate, span_15, chunk.text, /*ignoreCase:*/ true)) {
+                        var span_16 = wordSpans_1[_i];
+                        if (partStartsWith(candidate, span_16, chunk.text, /*ignoreCase:*/ true)) {
                             return createPatternMatch(PatternMatchKind.substring, punctuationStripped, 
-                            /*isCaseSensitive:*/ partStartsWith(candidate, span_15, chunk.text, /*ignoreCase:*/ false));
+                            /*isCaseSensitive:*/ partStartsWith(candidate, span_16, chunk.text, /*ignoreCase:*/ false));
                         }
                     }
                 }
@@ -68685,7 +82425,7 @@ var ts;
         if (ch >= 65 /* A */ && ch <= 90 /* Z */) {
             return true;
         }
-        if (ch < 127 /* maxAsciiCharacter */ || !ts.isUnicodeIdentifierStart(ch, 2 /* Latest */)) {
+        if (ch < 127 /* maxAsciiCharacter */ || !ts.isUnicodeIdentifierStart(ch, 5 /* Latest */)) {
             return false;
         }
         // TODO: find a way to determine this for any unicode characters in a
@@ -68698,7 +82438,7 @@ var ts;
         if (ch >= 97 /* a */ && ch <= 122 /* z */) {
             return true;
         }
-        if (ch < 127 /* maxAsciiCharacter */ || !ts.isUnicodeIdentifierStart(ch, 2 /* Latest */)) {
+        if (ch < 127 /* maxAsciiCharacter */ || !ts.isUnicodeIdentifierStart(ch, 5 /* Latest */)) {
             return false;
         }
         // TODO: find a way to determine this for any unicode characters in a
@@ -68708,7 +82448,8 @@ var ts;
     }
     // Assumes 'value' is already lowercase.
     function indexOfIgnoringCase(string, value) {
-        for (var i = 0, n = string.length - value.length; i <= n; i++) {
+        var n = string.length - value.length;
+        for (var i = 0; i <= n; i++) {
             if (startsWithIgnoringCase(string, value, i)) {
                 return i;
             }
@@ -68717,7 +82458,7 @@ var ts;
     }
     // Assumes 'value' is already lowercase.
     function startsWithIgnoringCase(string, value, start) {
-        for (var i = 0, n = value.length; i < n; i++) {
+        for (var i = 0; i < value.length; i++) {
             var ch1 = toLowerCase(string.charCodeAt(i + start));
             var ch2 = value.charCodeAt(i);
             if (ch1 !== ch2) {
@@ -68789,7 +82530,7 @@ var ts;
     function breakIntoSpans(identifier, word) {
         var result = [];
         var wordStart = 0;
-        for (var i = 1, n = identifier.length; i < n; i++) {
+        for (var i = 1; i < identifier.length; i++) {
             var lastIsDigit = isDigit(identifier.charCodeAt(i - 1));
             var currentIsDigit = isDigit(identifier.charCodeAt(i));
             var hasTransitionFromLowerToUpper = transitionFromLowerToUpper(identifier, word, i);
@@ -68919,10 +82660,10 @@ var ts;
         var externalModule = false;
         function nextToken() {
             var token = ts.scanner.scan();
-            if (token === 15 /* OpenBraceToken */) {
+            if (token === 17 /* OpenBraceToken */) {
                 braceNesting++;
             }
-            else if (token === 16 /* CloseBraceToken */) {
+            else if (token === 18 /* CloseBraceToken */) {
                 braceNesting--;
             }
             return token;
@@ -68973,10 +82714,10 @@ var ts;
          */
         function tryConsumeDeclare() {
             var token = ts.scanner.getToken();
-            if (token === 122 /* DeclareKeyword */) {
+            if (token === 124 /* DeclareKeyword */) {
                 // declare module "mod"
                 token = nextToken();
-                if (token === 125 /* ModuleKeyword */) {
+                if (token === 128 /* ModuleKeyword */) {
                     token = nextToken();
                     if (token === 9 /* StringLiteral */) {
                         recordAmbientExternalModule();
@@ -68991,17 +82732,25 @@ var ts;
          */
         function tryConsumeImport() {
             var token = ts.scanner.getToken();
-            if (token === 89 /* ImportKeyword */) {
+            if (token === 91 /* ImportKeyword */) {
                 token = nextToken();
-                if (token === 9 /* StringLiteral */) {
+                if (token === 19 /* OpenParenToken */) {
+                    token = nextToken();
+                    if (token === 9 /* StringLiteral */) {
+                        // import("mod");
+                        recordModuleName();
+                        return true;
+                    }
+                }
+                else if (token === 9 /* StringLiteral */) {
                     // import "mod";
                     recordModuleName();
                     return true;
                 }
                 else {
-                    if (token === 69 /* Identifier */ || ts.isKeyword(token)) {
+                    if (token === 71 /* Identifier */ || ts.isKeyword(token)) {
                         token = nextToken();
-                        if (token === 136 /* FromKeyword */) {
+                        if (token === 140 /* FromKeyword */) {
                             token = nextToken();
                             if (token === 9 /* StringLiteral */) {
                                 // import d from "mod";
@@ -69009,12 +82758,12 @@ var ts;
                                 return true;
                             }
                         }
-                        else if (token === 56 /* EqualsToken */) {
+                        else if (token === 58 /* EqualsToken */) {
                             if (tryConsumeRequireCall(/*skipCurrentToken*/ true)) {
                                 return true;
                             }
                         }
-                        else if (token === 24 /* CommaToken */) {
+                        else if (token === 26 /* CommaToken */) {
                             // consume comma and keep going
                             token = nextToken();
                         }
@@ -69023,16 +82772,16 @@ var ts;
                             return true;
                         }
                     }
-                    if (token === 15 /* OpenBraceToken */) {
+                    if (token === 17 /* OpenBraceToken */) {
                         token = nextToken();
                         // consume "{ a as B, c, d as D}" clauses
                         // make sure that it stops on EOF
-                        while (token !== 16 /* CloseBraceToken */ && token !== 1 /* EndOfFileToken */) {
+                        while (token !== 18 /* CloseBraceToken */ && token !== 1 /* EndOfFileToken */) {
                             token = nextToken();
                         }
-                        if (token === 16 /* CloseBraceToken */) {
+                        if (token === 18 /* CloseBraceToken */) {
                             token = nextToken();
-                            if (token === 136 /* FromKeyword */) {
+                            if (token === 140 /* FromKeyword */) {
                                 token = nextToken();
                                 if (token === 9 /* StringLiteral */) {
                                     // import {a as A} from "mod";
@@ -69042,13 +82791,13 @@ var ts;
                             }
                         }
                     }
-                    else if (token === 37 /* AsteriskToken */) {
+                    else if (token === 39 /* AsteriskToken */) {
                         token = nextToken();
-                        if (token === 116 /* AsKeyword */) {
+                        if (token === 118 /* AsKeyword */) {
                             token = nextToken();
-                            if (token === 69 /* Identifier */ || ts.isKeyword(token)) {
+                            if (token === 71 /* Identifier */ || ts.isKeyword(token)) {
                                 token = nextToken();
-                                if (token === 136 /* FromKeyword */) {
+                                if (token === 140 /* FromKeyword */) {
                                     token = nextToken();
                                     if (token === 9 /* StringLiteral */) {
                                         // import * as NS from "mod"
@@ -69066,19 +82815,19 @@ var ts;
         }
         function tryConsumeExport() {
             var token = ts.scanner.getToken();
-            if (token === 82 /* ExportKeyword */) {
+            if (token === 84 /* ExportKeyword */) {
                 markAsExternalModuleIfTopLevel();
                 token = nextToken();
-                if (token === 15 /* OpenBraceToken */) {
+                if (token === 17 /* OpenBraceToken */) {
                     token = nextToken();
                     // consume "{ a as B, c, d as D}" clauses
                     // make sure it stops on EOF
-                    while (token !== 16 /* CloseBraceToken */ && token !== 1 /* EndOfFileToken */) {
+                    while (token !== 18 /* CloseBraceToken */ && token !== 1 /* EndOfFileToken */) {
                         token = nextToken();
                     }
-                    if (token === 16 /* CloseBraceToken */) {
+                    if (token === 18 /* CloseBraceToken */) {
                         token = nextToken();
-                        if (token === 136 /* FromKeyword */) {
+                        if (token === 140 /* FromKeyword */) {
                             token = nextToken();
                             if (token === 9 /* StringLiteral */) {
                                 // export {a as A} from "mod";
@@ -69088,9 +82837,9 @@ var ts;
                         }
                     }
                 }
-                else if (token === 37 /* AsteriskToken */) {
+                else if (token === 39 /* AsteriskToken */) {
                     token = nextToken();
-                    if (token === 136 /* FromKeyword */) {
+                    if (token === 140 /* FromKeyword */) {
                         token = nextToken();
                         if (token === 9 /* StringLiteral */) {
                             // export * from "mod"
@@ -69098,11 +82847,11 @@ var ts;
                         }
                     }
                 }
-                else if (token === 89 /* ImportKeyword */) {
+                else if (token === 91 /* ImportKeyword */) {
                     token = nextToken();
-                    if (token === 69 /* Identifier */ || ts.isKeyword(token)) {
+                    if (token === 71 /* Identifier */ || ts.isKeyword(token)) {
                         token = nextToken();
-                        if (token === 56 /* EqualsToken */) {
+                        if (token === 58 /* EqualsToken */) {
                             if (tryConsumeRequireCall(/*skipCurrentToken*/ true)) {
                                 return true;
                             }
@@ -69115,9 +82864,9 @@ var ts;
         }
         function tryConsumeRequireCall(skipCurrentToken) {
             var token = skipCurrentToken ? nextToken() : ts.scanner.getToken();
-            if (token === 129 /* RequireKeyword */) {
+            if (token === 132 /* RequireKeyword */) {
                 token = nextToken();
-                if (token === 17 /* OpenParenToken */) {
+                if (token === 19 /* OpenParenToken */) {
                     token = nextToken();
                     if (token === 9 /* StringLiteral */) {
                         //  require("mod");
@@ -69130,16 +82879,16 @@ var ts;
         }
         function tryConsumeDefine() {
             var token = ts.scanner.getToken();
-            if (token === 69 /* Identifier */ && ts.scanner.getTokenValue() === "define") {
+            if (token === 71 /* Identifier */ && ts.scanner.getTokenValue() === "define") {
                 token = nextToken();
-                if (token !== 17 /* OpenParenToken */) {
+                if (token !== 19 /* OpenParenToken */) {
                     return true;
                 }
                 token = nextToken();
                 if (token === 9 /* StringLiteral */) {
                     // looks like define ("modname", ... - skip string literal and comma
                     token = nextToken();
-                    if (token === 24 /* CommaToken */) {
+                    if (token === 26 /* CommaToken */) {
                         token = nextToken();
                     }
                     else {
@@ -69148,14 +82897,14 @@ var ts;
                     }
                 }
                 // should be start of dependency list
-                if (token !== 19 /* OpenBracketToken */) {
+                if (token !== 21 /* OpenBracketToken */) {
                     return true;
                 }
                 // skip open bracket
                 token = nextToken();
                 var i = 0;
                 // scan until ']' or EOF
-                while (token !== 20 /* CloseBracketToken */ && token !== 1 /* EndOfFileToken */) {
+                while (token !== 22 /* CloseBracketToken */ && token !== 1 /* EndOfFileToken */) {
                     // record string literals as module names
                     if (token === 9 /* StringLiteral */) {
                         recordModuleName();
@@ -69177,7 +82926,7 @@ var ts;
             //    import * as NS  from "mod"
             //    import d, {a, b as B} from "mod"
             //    import i = require("mod");
-            //
+            //    import("mod");
             //    export * from "mod"
             //    export {a as b} from "mod"
             //    export import i = require("mod")
@@ -69242,93 +82991,89 @@ var ts;
     var Rename;
     (function (Rename) {
         function getRenameInfo(typeChecker, defaultLibFileName, getCanonicalFileName, sourceFile, position) {
-            var canonicalDefaultLibName = getCanonicalFileName(ts.normalizePath(defaultLibFileName));
+            var getCanonicalDefaultLibName = ts.memoize(function () { return getCanonicalFileName(ts.normalizePath(defaultLibFileName)); });
             var node = ts.getTouchingWord(sourceFile, position, /*includeJsDocComment*/ true);
-            if (node) {
-                if (node.kind === 69 /* Identifier */ ||
-                    node.kind === 9 /* StringLiteral */ ||
-                    ts.isLiteralNameOfPropertyDeclarationOrIndexAccess(node) ||
-                    ts.isThis(node)) {
-                    var symbol = typeChecker.getSymbolAtLocation(node);
-                    // Only allow a symbol to be renamed if it actually has at least one declaration.
-                    if (symbol) {
-                        var declarations = symbol.getDeclarations();
-                        if (declarations && declarations.length > 0) {
-                            // Disallow rename for elements that are defined in the standard TypeScript library.
-                            if (ts.forEach(declarations, isDefinedInLibraryFile)) {
-                                return getRenameInfoError(ts.getLocaleSpecificMessage(ts.Diagnostics.You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library));
-                            }
-                            var displayName = ts.stripQuotes(ts.getDeclaredName(typeChecker, symbol, node));
-                            var kind = ts.SymbolDisplay.getSymbolKind(typeChecker, symbol, node);
-                            if (kind) {
-                                return {
-                                    canRename: true,
-                                    kind: kind,
-                                    displayName: displayName,
-                                    localizedErrorMessage: undefined,
-                                    fullDisplayName: typeChecker.getFullyQualifiedName(symbol),
-                                    kindModifiers: ts.SymbolDisplay.getSymbolModifiers(symbol),
-                                    triggerSpan: createTriggerSpanForNode(node, sourceFile)
-                                };
-                            }
-                        }
-                    }
-                    else if (node.kind === 9 /* StringLiteral */) {
-                        var type = ts.getStringLiteralTypeForNode(node, typeChecker);
-                        if (type) {
-                            if (isDefinedInLibraryFile(node)) {
-                                return getRenameInfoError(ts.getLocaleSpecificMessage(ts.Diagnostics.You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library));
-                            }
-                            else {
-                                var displayName = ts.stripQuotes(type.text);
-                                return {
-                                    canRename: true,
-                                    kind: ts.ScriptElementKind.variableElement,
-                                    displayName: displayName,
-                                    localizedErrorMessage: undefined,
-                                    fullDisplayName: displayName,
-                                    kindModifiers: ts.ScriptElementKindModifier.none,
-                                    triggerSpan: createTriggerSpanForNode(node, sourceFile)
-                                };
-                            }
-                        }
-                    }
+            var renameInfo = node && nodeIsEligibleForRename(node)
+                ? getRenameInfoForNode(node, typeChecker, sourceFile, isDefinedInLibraryFile)
+                : undefined;
+            return renameInfo || getRenameInfoError(ts.Diagnostics.You_cannot_rename_this_element);
+            function isDefinedInLibraryFile(declaration) {
+                if (!defaultLibFileName) {
+                    return false;
                 }
+                var sourceFile = declaration.getSourceFile();
+                var canonicalName = getCanonicalFileName(ts.normalizePath(sourceFile.fileName));
+                return canonicalName === getCanonicalDefaultLibName();
             }
-            return getRenameInfoError(ts.getLocaleSpecificMessage(ts.Diagnostics.You_cannot_rename_this_element));
-            function getRenameInfoError(localizedErrorMessage) {
-                return {
-                    canRename: false,
-                    localizedErrorMessage: localizedErrorMessage,
-                    displayName: undefined,
-                    fullDisplayName: undefined,
-                    kind: undefined,
-                    kindModifiers: undefined,
-                    triggerSpan: undefined
-                };
-            }
-            function isDefinedInLibraryFile(declaration) {
-                if (defaultLibFileName) {
-                    var sourceFile_2 = declaration.getSourceFile();
-                    var canonicalName = getCanonicalFileName(ts.normalizePath(sourceFile_2.fileName));
-                    if (canonicalName === canonicalDefaultLibName) {
-                        return true;
+        }
+        Rename.getRenameInfo = getRenameInfo;
+        function getRenameInfoForNode(node, typeChecker, sourceFile, isDefinedInLibraryFile) {
+            var symbol = typeChecker.getSymbolAtLocation(node);
+            // Only allow a symbol to be renamed if it actually has at least one declaration.
+            if (symbol) {
+                var declarations = symbol.getDeclarations();
+                if (declarations && declarations.length > 0) {
+                    // Disallow rename for elements that are defined in the standard TypeScript library.
+                    if (ts.some(declarations, isDefinedInLibraryFile)) {
+                        return getRenameInfoError(ts.Diagnostics.You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library);
+                    }
+                    // Cannot rename `default` as in `import { default as foo } from "./someModule";
+                    if (node.kind === 71 /* Identifier */ &&
+                        node.originalKeywordKind === 79 /* DefaultKeyword */ &&
+                        symbol.parent.flags & 1536 /* Module */) {
+                        return undefined;
                     }
+                    var displayName = ts.stripQuotes(ts.getDeclaredName(typeChecker, symbol, node));
+                    var kind = ts.SymbolDisplay.getSymbolKind(typeChecker, symbol, node);
+                    return kind ? getRenameInfoSuccess(displayName, typeChecker.getFullyQualifiedName(symbol), kind, ts.SymbolDisplay.getSymbolModifiers(symbol), node, sourceFile) : undefined;
                 }
-                return false;
             }
-            function createTriggerSpanForNode(node, sourceFile) {
-                var start = node.getStart(sourceFile);
-                var width = node.getWidth(sourceFile);
-                if (node.kind === 9 /* StringLiteral */) {
-                    // Exclude the quotes
-                    start += 1;
-                    width -= 2;
+            else if (node.kind === 9 /* StringLiteral */) {
+                if (isDefinedInLibraryFile(node)) {
+                    return getRenameInfoError(ts.Diagnostics.You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library);
                 }
-                return ts.createTextSpan(start, width);
+                var displayName = ts.stripQuotes(node.text);
+                return getRenameInfoSuccess(displayName, displayName, "var" /* variableElement */, "" /* none */, node, sourceFile);
             }
         }
-        Rename.getRenameInfo = getRenameInfo;
+        function getRenameInfoSuccess(displayName, fullDisplayName, kind, kindModifiers, node, sourceFile) {
+            return {
+                canRename: true,
+                kind: kind,
+                displayName: displayName,
+                localizedErrorMessage: undefined,
+                fullDisplayName: fullDisplayName,
+                kindModifiers: kindModifiers,
+                triggerSpan: createTriggerSpanForNode(node, sourceFile)
+            };
+        }
+        function getRenameInfoError(diagnostic) {
+            return {
+                canRename: false,
+                localizedErrorMessage: ts.getLocaleSpecificMessage(diagnostic),
+                displayName: undefined,
+                fullDisplayName: undefined,
+                kind: undefined,
+                kindModifiers: undefined,
+                triggerSpan: undefined
+            };
+        }
+        function createTriggerSpanForNode(node, sourceFile) {
+            var start = node.getStart(sourceFile);
+            var width = node.getWidth(sourceFile);
+            if (node.kind === 9 /* StringLiteral */) {
+                // Exclude the quotes
+                start += 1;
+                width -= 2;
+            }
+            return ts.createTextSpan(start, width);
+        }
+        function nodeIsEligibleForRename(node) {
+            return node.kind === 71 /* Identifier */ ||
+                node.kind === 9 /* StringLiteral */ ||
+                ts.isLiteralNameOfPropertyDeclarationOrIndexAccess(node) ||
+                ts.isThis(node);
+        }
     })(Rename = ts.Rename || (ts.Rename = {}));
 })(ts || (ts = {}));
 ///<reference path='services.ts' />
@@ -69337,145 +83082,14 @@ var ts;
 (function (ts) {
     var SignatureHelp;
     (function (SignatureHelp) {
-        // A partially written generic type expression is not guaranteed to have the correct syntax tree. the expression could be parsed as less than/greater than expression or a comma expression
-        // or some other combination depending on what the user has typed so far. For the purposes of signature help we need to consider any location after "<" as a possible generic type reference.
-        // To do this, the method will back parse the expression starting at the position required. it will try to parse the current expression as a generic type expression, if it did succeed it
-        // will return the generic identifier that started the expression (e.g. "foo" in "foo<any, |"). It is then up to the caller to ensure that this is a valid generic expression through
-        // looking up the type. The method will also keep track of the parameter index inside the expression.
-        // public static isInPartiallyWrittenTypeArgumentList(syntaxTree: TypeScript.SyntaxTree, position: number): any {
-        //    let token = Syntax.findTokenOnLeft(syntaxTree.sourceUnit(), position, /*includeSkippedTokens*/ true);
-        //    if (token && TypeScript.Syntax.hasAncestorOfKind(token, TypeScript.SyntaxKind.TypeParameterList)) {
-        //        // We are in the wrong generic list. bail out
-        //        return null;
-        //    }
-        //    let stack = 0;
-        //    let argumentIndex = 0;
-        //    whileLoop:
-        //    while (token) {
-        //        switch (token.kind()) {
-        //            case TypeScript.SyntaxKind.LessThanToken:
-        //                if (stack === 0) {
-        //                    // Found the beginning of the generic argument expression
-        //                    let lessThanToken = token;
-        //                    token = previousToken(token, /*includeSkippedTokens*/ true);
-        //                    if (!token || token.kind() !== TypeScript.SyntaxKind.IdentifierName) {
-        //                        break whileLoop;
-        //                    }
-        //                    // Found the name, return the data
-        //                    return {
-        //                        genericIdentifer: token,
-        //                        lessThanToken: lessThanToken,
-        //                        argumentIndex: argumentIndex
-        //                    };
-        //                }
-        //                else if (stack < 0) {
-        //                    // Seen one too many less than tokens, bail out
-        //                    break whileLoop;
-        //                }
-        //                else {
-        //                    stack--;
-        //                }
-        //                break;
-        //            case TypeScript.SyntaxKind.GreaterThanGreaterThanGreaterThanToken:
-        //                stack++;
-        //            // Intentional fall through
-        //            case TypeScript.SyntaxKind.GreaterThanToken:
-        //                stack++;
-        //                break;
-        //            case TypeScript.SyntaxKind.CommaToken:
-        //                if (stack == 0) {
-        //                    argumentIndex++;
-        //                }
-        //                break;
-        //            case TypeScript.SyntaxKind.CloseBraceToken:
-        //                // This can be object type, skip untill we find the matching open brace token
-        //                let unmatchedOpenBraceTokens = 0;
-        //                // Skip untill the matching open brace token
-        //                token = SignatureInfoHelpers.moveBackUpTillMatchingTokenKind(token, TypeScript.SyntaxKind.CloseBraceToken, TypeScript.SyntaxKind.OpenBraceToken);
-        //                if (!token) {
-        //                    // No matching token was found. bail out
-        //                    break whileLoop;
-        //                }
-        //                break;
-        //            case TypeScript.SyntaxKind.EqualsGreaterThanToken:
-        //                // This can be a function type or a constructor type. In either case, we want to skip the function definition
-        //                token = previousToken(token, /*includeSkippedTokens*/ true);
-        //                if (token && token.kind() === TypeScript.SyntaxKind.CloseParenToken) {
-        //                    // Skip untill the matching open paren token
-        //                    token = SignatureInfoHelpers.moveBackUpTillMatchingTokenKind(token, TypeScript.SyntaxKind.CloseParenToken, TypeScript.SyntaxKind.OpenParenToken);
-        //                    if (token && token.kind() === TypeScript.SyntaxKind.GreaterThanToken) {
-        //                        // Another generic type argument list, skip it\
-        //                        token = SignatureInfoHelpers.moveBackUpTillMatchingTokenKind(token, TypeScript.SyntaxKind.GreaterThanToken, TypeScript.SyntaxKind.LessThanToken);
-        //                    }
-        //                    if (token && token.kind() === TypeScript.SyntaxKind.NewKeyword) {
-        //                        // In case this was a constructor type, skip the new keyword
-        //                        token = previousToken(token, /*includeSkippedTokens*/ true);
-        //                    }
-        //                    if (!token) {
-        //                        // No matching token was found. bail out
-        //                        break whileLoop;
-        //                    }
-        //                }
-        //                else {
-        //                    // This is not a function type. exit the main loop
-        //                    break whileLoop;
-        //                }
-        //                break;
-        //            case TypeScript.SyntaxKind.IdentifierName:
-        //            case TypeScript.SyntaxKind.AnyKeyword:
-        //            case TypeScript.SyntaxKind.NumberKeyword:
-        //            case TypeScript.SyntaxKind.StringKeyword:
-        //            case TypeScript.SyntaxKind.VoidKeyword:
-        //            case TypeScript.SyntaxKind.BooleanKeyword:
-        //            case TypeScript.SyntaxKind.DotToken:
-        //            case TypeScript.SyntaxKind.OpenBracketToken:
-        //            case TypeScript.SyntaxKind.CloseBracketToken:
-        //                // Valid tokens in a type name. Skip.
-        //                break;
-        //            default:
-        //                break whileLoop;
-        //        }
-        //        token = previousToken(token, /*includeSkippedTokens*/ true);
-        //    }
-        //    return null;
-        // }
-        // private static moveBackUpTillMatchingTokenKind(token: TypeScript.ISyntaxToken, tokenKind: TypeScript.SyntaxKind, matchingTokenKind: TypeScript.SyntaxKind): TypeScript.ISyntaxToken {
-        //    if (!token || token.kind() !== tokenKind) {
-        //        throw TypeScript.Errors.invalidOperation();
-        //    }
-        //    // Skip the current token
-        //    token = previousToken(token, /*includeSkippedTokens*/ true);
-        //    let stack = 0;
-        //    while (token) {
-        //        if (token.kind() === matchingTokenKind) {
-        //            if (stack === 0) {
-        //                // Found the matching token, return
-        //                return token;
-        //            }
-        //            else if (stack < 0) {
-        //                // tokens overlapped.. bail out.
-        //                break;
-        //            }
-        //            else {
-        //                stack--;
-        //            }
-        //        }
-        //        else if (token.kind() === tokenKind) {
-        //            stack++;
-        //        }
-        //        // Move back
-        //        token = previousToken(token, /*includeSkippedTokens*/ true);
-        //    }
-        //    // Did not find matching token
-        //    return null;
-        // }
         var emptyArray = [];
+        var ArgumentListKind;
         (function (ArgumentListKind) {
             ArgumentListKind[ArgumentListKind["TypeArguments"] = 0] = "TypeArguments";
             ArgumentListKind[ArgumentListKind["CallArguments"] = 1] = "CallArguments";
             ArgumentListKind[ArgumentListKind["TaggedTemplateArguments"] = 2] = "TaggedTemplateArguments";
-        })(SignatureHelp.ArgumentListKind || (SignatureHelp.ArgumentListKind = {}));
-        var ArgumentListKind = SignatureHelp.ArgumentListKind;
+            ArgumentListKind[ArgumentListKind["JSXAttributesArguments"] = 3] = "JSXAttributesArguments";
+        })(ArgumentListKind = SignatureHelp.ArgumentListKind || (SignatureHelp.ArgumentListKind = {}));
         function getSignatureHelpItems(program, sourceFile, position, cancellationToken) {
             var typeChecker = program.getTypeChecker();
             // Decide whether to show signature help
@@ -69506,15 +83120,15 @@ var ts;
         }
         SignatureHelp.getSignatureHelpItems = getSignatureHelpItems;
         function createJavaScriptSignatureHelpItems(argumentInfo, program) {
-            if (argumentInfo.invocation.kind !== 174 /* CallExpression */) {
+            if (argumentInfo.invocation.kind !== 181 /* CallExpression */) {
                 return undefined;
             }
             // See if we can find some symbol with the call expression name that has call signatures.
             var callExpression = argumentInfo.invocation;
             var expression = callExpression.expression;
-            var name = expression.kind === 69 /* Identifier */
+            var name = expression.kind === 71 /* Identifier */
                 ? expression
-                : expression.kind === 172 /* PropertyAccessExpression */
+                : expression.kind === 179 /* PropertyAccessExpression */
                     ? expression.name
                     : undefined;
             if (!name || !name.text) {
@@ -69524,10 +83138,10 @@ var ts;
             for (var _i = 0, _a = program.getSourceFiles(); _i < _a.length; _i++) {
                 var sourceFile = _a[_i];
                 var nameToDeclarations = sourceFile.getNamedDeclarations();
-                var declarations = nameToDeclarations[name.text];
+                var declarations = nameToDeclarations.get(name.text);
                 if (declarations) {
-                    for (var _b = 0, declarations_10 = declarations; _b < declarations_10.length; _b++) {
-                        var declaration = declarations_10[_b];
+                    for (var _b = 0, declarations_13 = declarations; _b < declarations_13.length; _b++) {
+                        var declaration = declarations_13[_b];
                         var symbol = declaration.symbol;
                         if (symbol) {
                             var type = typeChecker.getTypeOfSymbolAtLocation(symbol, declaration);
@@ -69547,24 +83161,24 @@ var ts;
          * in the argument of an invocation; returns undefined otherwise.
          */
         function getImmediatelyContainingArgumentInfo(node, position, sourceFile) {
-            if (node.parent.kind === 174 /* CallExpression */ || node.parent.kind === 175 /* NewExpression */) {
+            if (ts.isCallOrNewExpression(node.parent)) {
                 var callExpression = node.parent;
                 // There are 3 cases to handle:
-                //   1. The token introduces a list, and should begin a sig help session
+                //   1. The token introduces a list, and should begin a signature help session
                 //   2. The token is either not associated with a list, or ends a list, so the session should end
-                //   3. The token is buried inside a list, and should give sig help
+                //   3. The token is buried inside a list, and should give signature help
                 //
                 // The following are examples of each:
                 //
                 //    Case 1:
-                //          foo<#T, U>(#a, b)    -> The token introduces a list, and should begin a sig help session
+                //          foo<#T, U>(#a, b)    -> The token introduces a list, and should begin a signature help session
                 //    Case 2:
                 //          fo#o<T, U>#(a, b)#   -> The token is either not associated with a list, or ends a list, so the session should end
                 //    Case 3:
-                //          foo<T#, U#>(a#, #b#) -> The token is buried inside a list, and should give sig help
+                //          foo<T#, U#>(a#, #b#) -> The token is buried inside a list, and should give signature help
                 // Find out if 'node' is an argument, a type argument, or neither
-                if (node.kind === 25 /* LessThanToken */ ||
-                    node.kind === 17 /* OpenParenToken */) {
+                if (node.kind === 27 /* LessThanToken */ ||
+                    node.kind === 19 /* OpenParenToken */) {
                     // Find the list that starts right *after* the < or ( token.
                     // If the user has just opened a list, consider this item 0.
                     var list = getChildListThatStartsWithOpenerToken(callExpression, node, sourceFile);
@@ -69580,7 +83194,7 @@ var ts;
                 }
                 // findListItemInfo can return undefined if we are not in parent's argument list
                 // or type argument list. This includes cases where the cursor is:
-                //   - To the right of the closing paren, non-substitution template, or template tail.
+                //   - To the right of the closing parenthesis, non-substitution template, or template tail.
                 //   - Between the type arguments and the arguments (greater than token)
                 //   - On the target of the call (parent.func)
                 //   - On the 'new' keyword in a 'new' expression
@@ -69601,35 +83215,52 @@ var ts;
                 }
                 return undefined;
             }
-            else if (node.kind === 11 /* NoSubstitutionTemplateLiteral */ && node.parent.kind === 176 /* TaggedTemplateExpression */) {
+            else if (node.kind === 13 /* NoSubstitutionTemplateLiteral */ && node.parent.kind === 183 /* TaggedTemplateExpression */) {
                 // Check if we're actually inside the template;
                 // otherwise we'll fall out and return undefined.
                 if (ts.isInsideTemplateLiteral(node, position)) {
                     return getArgumentListInfoForTemplate(node.parent, /*argumentIndex*/ 0, sourceFile);
                 }
             }
-            else if (node.kind === 12 /* TemplateHead */ && node.parent.parent.kind === 176 /* TaggedTemplateExpression */) {
+            else if (node.kind === 14 /* TemplateHead */ && node.parent.parent.kind === 183 /* TaggedTemplateExpression */) {
                 var templateExpression = node.parent;
                 var tagExpression = templateExpression.parent;
-                ts.Debug.assert(templateExpression.kind === 189 /* TemplateExpression */);
+                ts.Debug.assert(templateExpression.kind === 196 /* TemplateExpression */);
                 var argumentIndex = ts.isInsideTemplateLiteral(node, position) ? 0 : 1;
                 return getArgumentListInfoForTemplate(tagExpression, argumentIndex, sourceFile);
             }
-            else if (node.parent.kind === 197 /* TemplateSpan */ && node.parent.parent.parent.kind === 176 /* TaggedTemplateExpression */) {
+            else if (node.parent.kind === 205 /* TemplateSpan */ && node.parent.parent.parent.kind === 183 /* TaggedTemplateExpression */) {
                 var templateSpan = node.parent;
                 var templateExpression = templateSpan.parent;
                 var tagExpression = templateExpression.parent;
-                ts.Debug.assert(templateExpression.kind === 189 /* TemplateExpression */);
+                ts.Debug.assert(templateExpression.kind === 196 /* TemplateExpression */);
                 // If we're just after a template tail, don't show signature help.
-                if (node.kind === 14 /* TemplateTail */ && !ts.isInsideTemplateLiteral(node, position)) {
+                if (node.kind === 16 /* TemplateTail */ && !ts.isInsideTemplateLiteral(node, position)) {
                     return undefined;
                 }
                 var spanIndex = templateExpression.templateSpans.indexOf(templateSpan);
                 var argumentIndex = getArgumentIndexForTemplatePiece(spanIndex, node, position);
                 return getArgumentListInfoForTemplate(tagExpression, argumentIndex, sourceFile);
             }
+            else if (node.parent && ts.isJsxOpeningLikeElement(node.parent)) {
+                // Provide a signature help for JSX opening element or JSX self-closing element.
+                // This is not guarantee that JSX tag-name is resolved into stateless function component. (that is done in "getSignatureHelpItems")
+                // i.e
+                //      export function MainButton(props: ButtonProps, context: any): JSX.Element { ... }
+                //      <MainButton /*signatureHelp*/
+                var attributeSpanStart = node.parent.attributes.getFullStart();
+                var attributeSpanEnd = ts.skipTrivia(sourceFile.text, node.parent.attributes.getEnd(), /*stopAfterLineBreak*/ false);
+                return {
+                    kind: 3 /* JSXAttributesArguments */,
+                    invocation: node.parent,
+                    argumentsSpan: ts.createTextSpan(attributeSpanStart, attributeSpanEnd - attributeSpanStart),
+                    argumentIndex: 0,
+                    argumentCount: 1
+                };
+            }
             return undefined;
         }
+        SignatureHelp.getImmediatelyContainingArgumentInfo = getImmediatelyContainingArgumentInfo;
         function getArgumentIndex(argumentsList, node) {
             // The list we got back can include commas.  In the presence of errors it may
             // also just have nodes without commas.  For example "Foo(a b c)" will have 3
@@ -69649,7 +83280,7 @@ var ts;
                 if (child === node) {
                     break;
                 }
-                if (child.kind !== 24 /* CommaToken */) {
+                if (child.kind !== 26 /* CommaToken */) {
                     argumentIndex++;
                 }
             }
@@ -69665,11 +83296,11 @@ var ts;
             //
             // Note: this subtlety only applies to the last comma.  If you had "Foo(a,,"  then
             // we'll have:  'a' '<comma>' '<missing>'
-            // That will give us 2 non-commas.  We then add one for the last comma, givin us an
+            // That will give us 2 non-commas.  We then add one for the last comma, giving us an
             // arg count of 3.
             var listChildren = argumentsList.getChildren();
-            var argumentCount = ts.countWhere(listChildren, function (arg) { return arg.kind !== 24 /* CommaToken */; });
-            if (listChildren.length > 0 && ts.lastOrUndefined(listChildren).kind === 24 /* CommaToken */) {
+            var argumentCount = ts.countWhere(listChildren, function (arg) { return arg.kind !== 26 /* CommaToken */; });
+            if (listChildren.length > 0 && ts.lastOrUndefined(listChildren).kind === 26 /* CommaToken */) {
                 argumentCount++;
             }
             return argumentCount;
@@ -69699,7 +83330,7 @@ var ts;
         }
         function getArgumentListInfoForTemplate(tagExpression, argumentIndex, sourceFile) {
             // argumentCount is either 1 or (numSpans + 1) to account for the template strings array argument.
-            var argumentCount = tagExpression.template.kind === 11 /* NoSubstitutionTemplateLiteral */
+            var argumentCount = tagExpression.template.kind === 13 /* NoSubstitutionTemplateLiteral */
                 ? 1
                 : tagExpression.template.templateSpans.length + 1;
             ts.Debug.assert(argumentIndex === 0 || argumentIndex < argumentCount, "argumentCount < argumentIndex, " + argumentCount + " < " + argumentIndex);
@@ -69737,7 +83368,7 @@ var ts;
             //
             // This is because a Missing node has no width. However, what we actually want is to include trivia
             // leading up to the next token in case the user is about to type in a TemplateMiddle or TemplateTail.
-            if (template.kind === 189 /* TemplateExpression */) {
+            if (template.kind === 196 /* TemplateExpression */) {
                 var lastSpan = ts.lastOrUndefined(template.templateSpans);
                 if (lastSpan.literal.getFullWidth() === 0) {
                     applicableSpanEnd = ts.skipTrivia(sourceFile.text, applicableSpanEnd, /*stopAfterLineBreak*/ false);
@@ -69746,7 +83377,7 @@ var ts;
             return ts.createTextSpan(applicableSpanStart, applicableSpanEnd - applicableSpanStart);
         }
         function getContainingArgumentInfo(node, position, sourceFile) {
-            for (var n = node; n.kind !== 256 /* SourceFile */; n = n.parent) {
+            for (var n = node; n.kind !== 265 /* SourceFile */; n = n.parent) {
                 if (ts.isFunctionBlock(n)) {
                     return undefined;
                 }
@@ -69759,6 +83390,7 @@ var ts;
                 if (argumentInfo) {
                     return argumentInfo;
                 }
+                // TODO: Handle generic call with incomplete syntax
             }
             return undefined;
         }
@@ -69806,37 +83438,41 @@ var ts;
                 if (callTargetDisplayParts) {
                     ts.addRange(prefixDisplayParts, callTargetDisplayParts);
                 }
+                var isVariadic;
                 if (isTypeParameterList) {
-                    prefixDisplayParts.push(ts.punctuationPart(25 /* LessThanToken */));
+                    isVariadic = false; // type parameter lists are not variadic
+                    prefixDisplayParts.push(ts.punctuationPart(27 /* LessThanToken */));
                     var typeParameters = candidateSignature.typeParameters;
                     signatureHelpParameters = typeParameters && typeParameters.length > 0 ? ts.map(typeParameters, createSignatureHelpParameterForTypeParameter) : emptyArray;
-                    suffixDisplayParts.push(ts.punctuationPart(27 /* GreaterThanToken */));
+                    suffixDisplayParts.push(ts.punctuationPart(29 /* GreaterThanToken */));
                     var parameterParts = ts.mapToDisplayParts(function (writer) {
                         return typeChecker.getSymbolDisplayBuilder().buildDisplayForParametersAndDelimiters(candidateSignature.thisParameter, candidateSignature.parameters, writer, invocation);
                     });
                     ts.addRange(suffixDisplayParts, parameterParts);
                 }
                 else {
+                    isVariadic = candidateSignature.hasRestParameter;
                     var typeParameterParts = ts.mapToDisplayParts(function (writer) {
                         return typeChecker.getSymbolDisplayBuilder().buildDisplayForTypeParametersAndDelimiters(candidateSignature.typeParameters, writer, invocation);
                     });
                     ts.addRange(prefixDisplayParts, typeParameterParts);
-                    prefixDisplayParts.push(ts.punctuationPart(17 /* OpenParenToken */));
+                    prefixDisplayParts.push(ts.punctuationPart(19 /* OpenParenToken */));
                     var parameters = candidateSignature.parameters;
                     signatureHelpParameters = parameters.length > 0 ? ts.map(parameters, createSignatureHelpParameterForParameter) : emptyArray;
-                    suffixDisplayParts.push(ts.punctuationPart(18 /* CloseParenToken */));
+                    suffixDisplayParts.push(ts.punctuationPart(20 /* CloseParenToken */));
                 }
                 var returnTypeParts = ts.mapToDisplayParts(function (writer) {
                     return typeChecker.getSymbolDisplayBuilder().buildReturnTypeDisplay(candidateSignature, writer, invocation);
                 });
                 ts.addRange(suffixDisplayParts, returnTypeParts);
                 return {
-                    isVariadic: candidateSignature.hasRestParameter,
+                    isVariadic: isVariadic,
                     prefixDisplayParts: prefixDisplayParts,
                     suffixDisplayParts: suffixDisplayParts,
-                    separatorDisplayParts: [ts.punctuationPart(24 /* CommaToken */), ts.spacePart()],
+                    separatorDisplayParts: [ts.punctuationPart(26 /* CommaToken */), ts.spacePart()],
                     parameters: signatureHelpParameters,
-                    documentation: candidateSignature.getDocumentationComment()
+                    documentation: candidateSignature.getDocumentationComment(),
+                    tags: candidateSignature.getJsDocTags()
                 };
             });
             var argumentIndex = argumentListInfo.argumentIndex;
@@ -69886,71 +83522,73 @@ var ts;
     (function (SymbolDisplay) {
         // TODO(drosen): use contextual SemanticMeaning.
         function getSymbolKind(typeChecker, symbol, location) {
-            var flags = symbol.getFlags();
-            if (flags & 32 /* Class */)
-                return ts.getDeclarationOfKind(symbol, 192 /* ClassExpression */) ?
-                    ts.ScriptElementKind.localClassElement : ts.ScriptElementKind.classElement;
+            var flags = symbol.flags;
+            if (flags & 32 /* Class */) {
+                return ts.getDeclarationOfKind(symbol, 199 /* ClassExpression */) ?
+                    "local class" /* localClassElement */ : "class" /* classElement */;
+            }
             if (flags & 384 /* Enum */)
-                return ts.ScriptElementKind.enumElement;
+                return "enum" /* enumElement */;
             if (flags & 524288 /* TypeAlias */)
-                return ts.ScriptElementKind.typeElement;
+                return "type" /* typeElement */;
             if (flags & 64 /* Interface */)
-                return ts.ScriptElementKind.interfaceElement;
+                return "interface" /* interfaceElement */;
             if (flags & 262144 /* TypeParameter */)
-                return ts.ScriptElementKind.typeParameterElement;
-            var result = getSymbolKindOfConstructorPropertyMethodAccessorFunctionOrVar(typeChecker, symbol, flags, location);
-            if (result === ts.ScriptElementKind.unknown) {
+                return "type parameter" /* typeParameterElement */;
+            var result = getSymbolKindOfConstructorPropertyMethodAccessorFunctionOrVar(typeChecker, symbol, location);
+            if (result === "" /* unknown */) {
                 if (flags & 262144 /* TypeParameter */)
-                    return ts.ScriptElementKind.typeParameterElement;
+                    return "type parameter" /* typeParameterElement */;
                 if (flags & 8 /* EnumMember */)
-                    return ts.ScriptElementKind.variableElement;
+                    return "enum member" /* enumMemberElement */;
                 if (flags & 8388608 /* Alias */)
-                    return ts.ScriptElementKind.alias;
+                    return "alias" /* alias */;
                 if (flags & 1536 /* Module */)
-                    return ts.ScriptElementKind.moduleElement;
+                    return "module" /* moduleElement */;
             }
             return result;
         }
         SymbolDisplay.getSymbolKind = getSymbolKind;
-        function getSymbolKindOfConstructorPropertyMethodAccessorFunctionOrVar(typeChecker, symbol, flags, location) {
+        function getSymbolKindOfConstructorPropertyMethodAccessorFunctionOrVar(typeChecker, symbol, location) {
             if (typeChecker.isUndefinedSymbol(symbol)) {
-                return ts.ScriptElementKind.variableElement;
+                return "var" /* variableElement */;
             }
             if (typeChecker.isArgumentsSymbol(symbol)) {
-                return ts.ScriptElementKind.localVariableElement;
+                return "local var" /* localVariableElement */;
             }
-            if (location.kind === 97 /* ThisKeyword */ && ts.isExpression(location)) {
-                return ts.ScriptElementKind.parameterElement;
+            if (location.kind === 99 /* ThisKeyword */ && ts.isExpression(location)) {
+                return "parameter" /* parameterElement */;
             }
+            var flags = symbol.flags;
             if (flags & 3 /* Variable */) {
                 if (ts.isFirstDeclarationOfSymbolParameter(symbol)) {
-                    return ts.ScriptElementKind.parameterElement;
+                    return "parameter" /* parameterElement */;
                 }
                 else if (symbol.valueDeclaration && ts.isConst(symbol.valueDeclaration)) {
-                    return ts.ScriptElementKind.constElement;
+                    return "const" /* constElement */;
                 }
                 else if (ts.forEach(symbol.declarations, ts.isLet)) {
-                    return ts.ScriptElementKind.letElement;
+                    return "let" /* letElement */;
                 }
-                return isLocalVariableOrFunction(symbol) ? ts.ScriptElementKind.localVariableElement : ts.ScriptElementKind.variableElement;
+                return isLocalVariableOrFunction(symbol) ? "local var" /* localVariableElement */ : "var" /* variableElement */;
             }
             if (flags & 16 /* Function */)
-                return isLocalVariableOrFunction(symbol) ? ts.ScriptElementKind.localFunctionElement : ts.ScriptElementKind.functionElement;
+                return isLocalVariableOrFunction(symbol) ? "local function" /* localFunctionElement */ : "function" /* functionElement */;
             if (flags & 32768 /* GetAccessor */)
-                return ts.ScriptElementKind.memberGetAccessorElement;
+                return "getter" /* memberGetAccessorElement */;
             if (flags & 65536 /* SetAccessor */)
-                return ts.ScriptElementKind.memberSetAccessorElement;
+                return "setter" /* memberSetAccessorElement */;
             if (flags & 8192 /* Method */)
-                return ts.ScriptElementKind.memberFunctionElement;
+                return "method" /* memberFunctionElement */;
             if (flags & 16384 /* Constructor */)
-                return ts.ScriptElementKind.constructorImplementationElement;
+                return "constructor" /* constructorImplementationElement */;
             if (flags & 4 /* Property */) {
-                if (flags & 268435456 /* SyntheticProperty */) {
+                if (flags & 134217728 /* Transient */ && symbol.checkFlags & 6 /* Synthetic */) {
                     // If union property is result of union of non method (property/accessors/variables), it is labeled as property
                     var unionPropertyKind = ts.forEach(typeChecker.getRootSymbols(symbol), function (rootSymbol) {
                         var rootSymbolFlags = rootSymbol.getFlags();
                         if (rootSymbolFlags & (98308 /* PropertyOrAccessor */ | 3 /* Variable */)) {
-                            return ts.ScriptElementKind.memberVariableElement;
+                            return "property" /* memberVariableElement */;
                         }
                         ts.Debug.assert(!!(rootSymbolFlags & 8192 /* Method */));
                     });
@@ -69959,20 +83597,23 @@ var ts;
                         // make sure it has call signatures before we can label it as method
                         var typeOfUnionProperty = typeChecker.getTypeOfSymbolAtLocation(symbol, location);
                         if (typeOfUnionProperty.getCallSignatures().length) {
-                            return ts.ScriptElementKind.memberFunctionElement;
+                            return "method" /* memberFunctionElement */;
                         }
-                        return ts.ScriptElementKind.memberVariableElement;
+                        return "property" /* memberVariableElement */;
                     }
                     return unionPropertyKind;
                 }
-                return ts.ScriptElementKind.memberVariableElement;
+                if (location.parent && ts.isJsxAttribute(location.parent)) {
+                    return "JSX attribute" /* jsxAttribute */;
+                }
+                return "property" /* memberVariableElement */;
             }
-            return ts.ScriptElementKind.unknown;
+            return "" /* unknown */;
         }
         function getSymbolModifiers(symbol) {
             return symbol && symbol.declarations && symbol.declarations.length > 0
                 ? ts.getNodeModifiers(symbol.declarations[0])
-                : ts.ScriptElementKindModifier.none;
+                : "" /* none */;
         }
         SymbolDisplay.getSymbolModifiers = getSymbolModifiers;
         // TODO(drosen): Currently completion entry details passes the SemanticMeaning.All instead of using semanticMeaning of location
@@ -69980,21 +83621,22 @@ var ts;
             if (semanticMeaning === void 0) { semanticMeaning = ts.getMeaningFromLocation(location); }
             var displayParts = [];
             var documentation;
+            var tags;
             var symbolFlags = symbol.flags;
-            var symbolKind = getSymbolKindOfConstructorPropertyMethodAccessorFunctionOrVar(typeChecker, symbol, symbolFlags, location);
+            var symbolKind = getSymbolKindOfConstructorPropertyMethodAccessorFunctionOrVar(typeChecker, symbol, location);
             var hasAddedSymbolInfo;
-            var isThisExpression = location.kind === 97 /* ThisKeyword */ && ts.isExpression(location);
+            var isThisExpression = location.kind === 99 /* ThisKeyword */ && ts.isExpression(location);
             var type;
             // Class at constructor site need to be shown as constructor apart from property,method, vars
-            if (symbolKind !== ts.ScriptElementKind.unknown || symbolFlags & 32 /* Class */ || symbolFlags & 8388608 /* Alias */) {
+            if (symbolKind !== "" /* unknown */ || symbolFlags & 32 /* Class */ || symbolFlags & 8388608 /* Alias */) {
                 // If it is accessor they are allowed only if location is at name of the accessor
-                if (symbolKind === ts.ScriptElementKind.memberGetAccessorElement || symbolKind === ts.ScriptElementKind.memberSetAccessorElement) {
-                    symbolKind = ts.ScriptElementKind.memberVariableElement;
+                if (symbolKind === "getter" /* memberGetAccessorElement */ || symbolKind === "setter" /* memberSetAccessorElement */) {
+                    symbolKind = "property" /* memberVariableElement */;
                 }
                 var signature = void 0;
                 type = isThisExpression ? typeChecker.getTypeAtLocation(location) : typeChecker.getTypeOfSymbolAtLocation(symbol, location);
                 if (type) {
-                    if (location.parent && location.parent.kind === 172 /* PropertyAccessExpression */) {
+                    if (location.parent && location.parent.kind === 179 /* PropertyAccessExpression */) {
                         var right = location.parent.name;
                         // Either the location is on the right of a property access, or on the left and the right is missing
                         if (right === location || (right && right.getFullWidth() === 0)) {
@@ -70002,21 +83644,24 @@ var ts;
                         }
                     }
                     // try get the call/construct signature from the type if it matches
-                    var callExpression = void 0;
-                    if (location.kind === 174 /* CallExpression */ || location.kind === 175 /* NewExpression */) {
-                        callExpression = location;
+                    var callExpressionLike = void 0;
+                    if (ts.isCallOrNewExpression(location)) {
+                        callExpressionLike = location;
                     }
                     else if (ts.isCallExpressionTarget(location) || ts.isNewExpressionTarget(location)) {
-                        callExpression = location.parent;
+                        callExpressionLike = location.parent;
+                    }
+                    else if (location.parent && ts.isJsxOpeningLikeElement(location.parent) && ts.isFunctionLike(symbol.valueDeclaration)) {
+                        callExpressionLike = location.parent;
                     }
-                    if (callExpression) {
+                    if (callExpressionLike) {
                         var candidateSignatures = [];
-                        signature = typeChecker.getResolvedSignature(callExpression, candidateSignatures);
+                        signature = typeChecker.getResolvedSignature(callExpressionLike, candidateSignatures);
                         if (!signature && candidateSignatures.length) {
                             // Use the first candidate:
                             signature = candidateSignatures[0];
                         }
-                        var useConstructSignatures = callExpression.kind === 175 /* NewExpression */ || callExpression.expression.kind === 95 /* SuperKeyword */;
+                        var useConstructSignatures = callExpressionLike.kind === 182 /* NewExpression */ || (ts.isCallExpression(callExpressionLike) && callExpressionLike.expression.kind === 97 /* SuperKeyword */);
                         var allSignatures = useConstructSignatures ? type.getConstructSignatures() : type.getCallSignatures();
                         if (!ts.contains(allSignatures, signature.target) && !ts.contains(allSignatures, signature)) {
                             // Get the first signature if there is one -- allSignatures may contain
@@ -70026,15 +83671,15 @@ var ts;
                         if (signature) {
                             if (useConstructSignatures && (symbolFlags & 32 /* Class */)) {
                                 // Constructor
-                                symbolKind = ts.ScriptElementKind.constructorImplementationElement;
+                                symbolKind = "constructor" /* constructorImplementationElement */;
                                 addPrefixForAnyFunctionOrVar(type.symbol, symbolKind);
                             }
                             else if (symbolFlags & 8388608 /* Alias */) {
-                                symbolKind = ts.ScriptElementKind.alias;
+                                symbolKind = "alias" /* alias */;
                                 pushTypePart(symbolKind);
                                 displayParts.push(ts.spacePart());
                                 if (useConstructSignatures) {
-                                    displayParts.push(ts.keywordPart(92 /* NewKeyword */));
+                                    displayParts.push(ts.keywordPart(94 /* NewKeyword */));
                                     displayParts.push(ts.spacePart());
                                 }
                                 addFullSymbolName(symbol);
@@ -70043,23 +83688,24 @@ var ts;
                                 addPrefixForAnyFunctionOrVar(symbol, symbolKind);
                             }
                             switch (symbolKind) {
-                                case ts.ScriptElementKind.memberVariableElement:
-                                case ts.ScriptElementKind.variableElement:
-                                case ts.ScriptElementKind.constElement:
-                                case ts.ScriptElementKind.letElement:
-                                case ts.ScriptElementKind.parameterElement:
-                                case ts.ScriptElementKind.localVariableElement:
+                                case "JSX attribute" /* jsxAttribute */:
+                                case "property" /* memberVariableElement */:
+                                case "var" /* variableElement */:
+                                case "const" /* constElement */:
+                                case "let" /* letElement */:
+                                case "parameter" /* parameterElement */:
+                                case "local var" /* localVariableElement */:
                                     // If it is call or construct signature of lambda's write type name
-                                    displayParts.push(ts.punctuationPart(54 /* ColonToken */));
+                                    displayParts.push(ts.punctuationPart(56 /* ColonToken */));
                                     displayParts.push(ts.spacePart());
                                     if (useConstructSignatures) {
-                                        displayParts.push(ts.keywordPart(92 /* NewKeyword */));
+                                        displayParts.push(ts.keywordPart(94 /* NewKeyword */));
                                         displayParts.push(ts.spacePart());
                                     }
-                                    if (!(type.flags & 2097152 /* Anonymous */) && type.symbol) {
+                                    if (!(type.flags & 32768 /* Object */ && type.objectFlags & 16 /* Anonymous */) && type.symbol) {
                                         ts.addRange(displayParts, ts.symbolToDisplayParts(typeChecker, type.symbol, enclosingDeclaration, /*meaning*/ undefined, 1 /* WriteTypeParametersOrArguments */));
                                     }
-                                    addSignatureDisplayParts(signature, allSignatures, 8 /* WriteArrowStyleSignature */);
+                                    addSignatureDisplayParts(signature, allSignatures, 16 /* WriteArrowStyleSignature */);
                                     break;
                                 default:
                                     // Just signature
@@ -70069,41 +83715,47 @@ var ts;
                         }
                     }
                     else if ((ts.isNameOfFunctionDeclaration(location) && !(symbol.flags & 98304 /* Accessor */)) ||
-                        (location.kind === 121 /* ConstructorKeyword */ && location.parent.kind === 148 /* Constructor */)) {
+                        (location.kind === 123 /* ConstructorKeyword */ && location.parent.kind === 152 /* Constructor */)) {
                         // get the signature from the declaration and write it
-                        var functionDeclaration = location.parent;
-                        var allSignatures = functionDeclaration.kind === 148 /* Constructor */ ? type.getNonNullableType().getConstructSignatures() : type.getNonNullableType().getCallSignatures();
-                        if (!typeChecker.isImplementationOfOverload(functionDeclaration)) {
-                            signature = typeChecker.getSignatureFromDeclaration(functionDeclaration);
-                        }
-                        else {
-                            signature = allSignatures[0];
-                        }
-                        if (functionDeclaration.kind === 148 /* Constructor */) {
-                            // show (constructor) Type(...) signature
-                            symbolKind = ts.ScriptElementKind.constructorImplementationElement;
-                            addPrefixForAnyFunctionOrVar(type.symbol, symbolKind);
-                        }
-                        else {
-                            // (function/method) symbol(..signature)
-                            addPrefixForAnyFunctionOrVar(functionDeclaration.kind === 151 /* CallSignature */ &&
-                                !(type.symbol.flags & 2048 /* TypeLiteral */ || type.symbol.flags & 4096 /* ObjectLiteral */) ? type.symbol : symbol, symbolKind);
+                        var functionDeclaration_1 = location.parent;
+                        // Use function declaration to write the signatures only if the symbol corresponding to this declaration
+                        var locationIsSymbolDeclaration = ts.findDeclaration(symbol, function (declaration) {
+                            return declaration === (location.kind === 123 /* ConstructorKeyword */ ? functionDeclaration_1.parent : functionDeclaration_1);
+                        });
+                        if (locationIsSymbolDeclaration) {
+                            var allSignatures = functionDeclaration_1.kind === 152 /* Constructor */ ? type.getNonNullableType().getConstructSignatures() : type.getNonNullableType().getCallSignatures();
+                            if (!typeChecker.isImplementationOfOverload(functionDeclaration_1)) {
+                                signature = typeChecker.getSignatureFromDeclaration(functionDeclaration_1);
+                            }
+                            else {
+                                signature = allSignatures[0];
+                            }
+                            if (functionDeclaration_1.kind === 152 /* Constructor */) {
+                                // show (constructor) Type(...) signature
+                                symbolKind = "constructor" /* constructorImplementationElement */;
+                                addPrefixForAnyFunctionOrVar(type.symbol, symbolKind);
+                            }
+                            else {
+                                // (function/method) symbol(..signature)
+                                addPrefixForAnyFunctionOrVar(functionDeclaration_1.kind === 155 /* CallSignature */ &&
+                                    !(type.symbol.flags & 2048 /* TypeLiteral */ || type.symbol.flags & 4096 /* ObjectLiteral */) ? type.symbol : symbol, symbolKind);
+                            }
+                            addSignatureDisplayParts(signature, allSignatures);
+                            hasAddedSymbolInfo = true;
                         }
-                        addSignatureDisplayParts(signature, allSignatures);
-                        hasAddedSymbolInfo = true;
                     }
                 }
             }
             if (symbolFlags & 32 /* Class */ && !hasAddedSymbolInfo && !isThisExpression) {
-                if (ts.getDeclarationOfKind(symbol, 192 /* ClassExpression */)) {
+                if (ts.getDeclarationOfKind(symbol, 199 /* ClassExpression */)) {
                     // Special case for class expressions because we would like to indicate that
                     // the class name is local to the class body (similar to function expression)
                     //      (local class) class <className>
-                    pushTypePart(ts.ScriptElementKind.localClassElement);
+                    pushTypePart("local class" /* localClassElement */);
                 }
                 else {
                     // Class declaration has name which is not local.
-                    displayParts.push(ts.keywordPart(73 /* ClassKeyword */));
+                    displayParts.push(ts.keywordPart(75 /* ClassKeyword */));
                 }
                 displayParts.push(ts.spacePart());
                 addFullSymbolName(symbol);
@@ -70111,77 +83763,77 @@ var ts;
             }
             if ((symbolFlags & 64 /* Interface */) && (semanticMeaning & 2 /* Type */)) {
                 addNewLineIfDisplayPartsExist();
-                displayParts.push(ts.keywordPart(107 /* InterfaceKeyword */));
+                displayParts.push(ts.keywordPart(109 /* InterfaceKeyword */));
                 displayParts.push(ts.spacePart());
                 addFullSymbolName(symbol);
                 writeTypeParametersOfSymbol(symbol, sourceFile);
             }
             if (symbolFlags & 524288 /* TypeAlias */) {
                 addNewLineIfDisplayPartsExist();
-                displayParts.push(ts.keywordPart(134 /* TypeKeyword */));
+                displayParts.push(ts.keywordPart(138 /* TypeKeyword */));
                 displayParts.push(ts.spacePart());
                 addFullSymbolName(symbol);
                 writeTypeParametersOfSymbol(symbol, sourceFile);
                 displayParts.push(ts.spacePart());
-                displayParts.push(ts.operatorPart(56 /* EqualsToken */));
+                displayParts.push(ts.operatorPart(58 /* EqualsToken */));
                 displayParts.push(ts.spacePart());
-                ts.addRange(displayParts, ts.typeToDisplayParts(typeChecker, typeChecker.getDeclaredTypeOfSymbol(symbol), enclosingDeclaration, 512 /* InTypeAlias */));
+                ts.addRange(displayParts, ts.typeToDisplayParts(typeChecker, typeChecker.getDeclaredTypeOfSymbol(symbol), enclosingDeclaration, 1024 /* InTypeAlias */));
             }
             if (symbolFlags & 384 /* Enum */) {
                 addNewLineIfDisplayPartsExist();
                 if (ts.forEach(symbol.declarations, ts.isConstEnumDeclaration)) {
-                    displayParts.push(ts.keywordPart(74 /* ConstKeyword */));
+                    displayParts.push(ts.keywordPart(76 /* ConstKeyword */));
                     displayParts.push(ts.spacePart());
                 }
-                displayParts.push(ts.keywordPart(81 /* EnumKeyword */));
+                displayParts.push(ts.keywordPart(83 /* EnumKeyword */));
                 displayParts.push(ts.spacePart());
                 addFullSymbolName(symbol);
             }
             if (symbolFlags & 1536 /* Module */) {
                 addNewLineIfDisplayPartsExist();
-                var declaration = ts.getDeclarationOfKind(symbol, 225 /* ModuleDeclaration */);
-                var isNamespace = declaration && declaration.name && declaration.name.kind === 69 /* Identifier */;
-                displayParts.push(ts.keywordPart(isNamespace ? 126 /* NamespaceKeyword */ : 125 /* ModuleKeyword */));
+                var declaration = ts.getDeclarationOfKind(symbol, 233 /* ModuleDeclaration */);
+                var isNamespace = declaration && declaration.name && declaration.name.kind === 71 /* Identifier */;
+                displayParts.push(ts.keywordPart(isNamespace ? 129 /* NamespaceKeyword */ : 128 /* ModuleKeyword */));
                 displayParts.push(ts.spacePart());
                 addFullSymbolName(symbol);
             }
             if ((symbolFlags & 262144 /* TypeParameter */) && (semanticMeaning & 2 /* Type */)) {
                 addNewLineIfDisplayPartsExist();
-                displayParts.push(ts.punctuationPart(17 /* OpenParenToken */));
+                displayParts.push(ts.punctuationPart(19 /* OpenParenToken */));
                 displayParts.push(ts.textPart("type parameter"));
-                displayParts.push(ts.punctuationPart(18 /* CloseParenToken */));
+                displayParts.push(ts.punctuationPart(20 /* CloseParenToken */));
                 displayParts.push(ts.spacePart());
                 addFullSymbolName(symbol);
-                displayParts.push(ts.spacePart());
-                displayParts.push(ts.keywordPart(90 /* InKeyword */));
-                displayParts.push(ts.spacePart());
                 if (symbol.parent) {
                     // Class/Interface type parameter
+                    addInPrefix();
                     addFullSymbolName(symbol.parent, enclosingDeclaration);
                     writeTypeParametersOfSymbol(symbol.parent, enclosingDeclaration);
                 }
                 else {
                     // Method/function type parameter
-                    var declaration = ts.getDeclarationOfKind(symbol, 141 /* TypeParameter */);
-                    ts.Debug.assert(declaration !== undefined);
-                    declaration = declaration.parent;
+                    var decl = ts.getDeclarationOfKind(symbol, 145 /* TypeParameter */);
+                    ts.Debug.assert(decl !== undefined);
+                    var declaration = decl.parent;
                     if (declaration) {
                         if (ts.isFunctionLikeKind(declaration.kind)) {
+                            addInPrefix();
                             var signature = typeChecker.getSignatureFromDeclaration(declaration);
-                            if (declaration.kind === 152 /* ConstructSignature */) {
-                                displayParts.push(ts.keywordPart(92 /* NewKeyword */));
+                            if (declaration.kind === 156 /* ConstructSignature */) {
+                                displayParts.push(ts.keywordPart(94 /* NewKeyword */));
                                 displayParts.push(ts.spacePart());
                             }
-                            else if (declaration.kind !== 151 /* CallSignature */ && declaration.name) {
+                            else if (declaration.kind !== 155 /* CallSignature */ && declaration.name) {
                                 addFullSymbolName(declaration.symbol);
                             }
-                            ts.addRange(displayParts, ts.signatureToDisplayParts(typeChecker, signature, sourceFile, 32 /* WriteTypeArgumentsOfSignature */));
+                            ts.addRange(displayParts, ts.signatureToDisplayParts(typeChecker, signature, sourceFile, 64 /* WriteTypeArgumentsOfSignature */));
                         }
-                        else {
+                        else if (declaration.kind === 231 /* TypeAliasDeclaration */) {
                             // Type alias type parameter
                             // For example
                             //      type list<T> = T[];  // Both T will go through same code path
-                            displayParts.push(ts.keywordPart(134 /* TypeKeyword */));
+                            addInPrefix();
+                            displayParts.push(ts.keywordPart(138 /* TypeKeyword */));
                             displayParts.push(ts.spacePart());
                             addFullSymbolName(declaration.symbol);
                             writeTypeParametersOfSymbol(declaration.symbol, sourceFile);
@@ -70190,47 +83842,48 @@ var ts;
                 }
             }
             if (symbolFlags & 8 /* EnumMember */) {
+                symbolKind = "enum member" /* enumMemberElement */;
                 addPrefixForAnyFunctionOrVar(symbol, "enum member");
                 var declaration = symbol.declarations[0];
-                if (declaration.kind === 255 /* EnumMember */) {
+                if (declaration.kind === 264 /* EnumMember */) {
                     var constantValue = typeChecker.getConstantValue(declaration);
                     if (constantValue !== undefined) {
                         displayParts.push(ts.spacePart());
-                        displayParts.push(ts.operatorPart(56 /* EqualsToken */));
+                        displayParts.push(ts.operatorPart(58 /* EqualsToken */));
                         displayParts.push(ts.spacePart());
-                        displayParts.push(ts.displayPart(constantValue.toString(), ts.SymbolDisplayPartKind.numericLiteral));
+                        displayParts.push(ts.displayPart(ts.getTextOfConstantValue(constantValue), typeof constantValue === "number" ? ts.SymbolDisplayPartKind.numericLiteral : ts.SymbolDisplayPartKind.stringLiteral));
                     }
                 }
             }
             if (symbolFlags & 8388608 /* Alias */) {
                 addNewLineIfDisplayPartsExist();
-                if (symbol.declarations[0].kind === 228 /* NamespaceExportDeclaration */) {
-                    displayParts.push(ts.keywordPart(82 /* ExportKeyword */));
+                if (symbol.declarations[0].kind === 236 /* NamespaceExportDeclaration */) {
+                    displayParts.push(ts.keywordPart(84 /* ExportKeyword */));
                     displayParts.push(ts.spacePart());
-                    displayParts.push(ts.keywordPart(126 /* NamespaceKeyword */));
+                    displayParts.push(ts.keywordPart(129 /* NamespaceKeyword */));
                 }
                 else {
-                    displayParts.push(ts.keywordPart(89 /* ImportKeyword */));
+                    displayParts.push(ts.keywordPart(91 /* ImportKeyword */));
                 }
                 displayParts.push(ts.spacePart());
                 addFullSymbolName(symbol);
                 ts.forEach(symbol.declarations, function (declaration) {
-                    if (declaration.kind === 229 /* ImportEqualsDeclaration */) {
+                    if (declaration.kind === 237 /* ImportEqualsDeclaration */) {
                         var importEqualsDeclaration = declaration;
                         if (ts.isExternalModuleImportEqualsDeclaration(importEqualsDeclaration)) {
                             displayParts.push(ts.spacePart());
-                            displayParts.push(ts.operatorPart(56 /* EqualsToken */));
+                            displayParts.push(ts.operatorPart(58 /* EqualsToken */));
                             displayParts.push(ts.spacePart());
-                            displayParts.push(ts.keywordPart(129 /* RequireKeyword */));
-                            displayParts.push(ts.punctuationPart(17 /* OpenParenToken */));
+                            displayParts.push(ts.keywordPart(132 /* RequireKeyword */));
+                            displayParts.push(ts.punctuationPart(19 /* OpenParenToken */));
                             displayParts.push(ts.displayPart(ts.getTextOfNode(ts.getExternalModuleImportEqualsDeclarationExpression(importEqualsDeclaration)), ts.SymbolDisplayPartKind.stringLiteral));
-                            displayParts.push(ts.punctuationPart(18 /* CloseParenToken */));
+                            displayParts.push(ts.punctuationPart(20 /* CloseParenToken */));
                         }
                         else {
                             var internalAliasSymbol = typeChecker.getSymbolAtLocation(importEqualsDeclaration.moduleReference);
                             if (internalAliasSymbol) {
                                 displayParts.push(ts.spacePart());
-                                displayParts.push(ts.operatorPart(56 /* EqualsToken */));
+                                displayParts.push(ts.operatorPart(58 /* EqualsToken */));
                                 displayParts.push(ts.spacePart());
                                 addFullSymbolName(internalAliasSymbol, enclosingDeclaration);
                             }
@@ -70240,21 +83893,22 @@ var ts;
                 });
             }
             if (!hasAddedSymbolInfo) {
-                if (symbolKind !== ts.ScriptElementKind.unknown) {
+                if (symbolKind !== "" /* unknown */) {
                     if (type) {
                         if (isThisExpression) {
                             addNewLineIfDisplayPartsExist();
-                            displayParts.push(ts.keywordPart(97 /* ThisKeyword */));
+                            displayParts.push(ts.keywordPart(99 /* ThisKeyword */));
                         }
                         else {
                             addPrefixForAnyFunctionOrVar(symbol, symbolKind);
                         }
                         // For properties, variables and local vars: show the type
-                        if (symbolKind === ts.ScriptElementKind.memberVariableElement ||
+                        if (symbolKind === "property" /* memberVariableElement */ ||
+                            symbolKind === "JSX attribute" /* jsxAttribute */ ||
                             symbolFlags & 3 /* Variable */ ||
-                            symbolKind === ts.ScriptElementKind.localVariableElement ||
+                            symbolKind === "local var" /* localVariableElement */ ||
                             isThisExpression) {
-                            displayParts.push(ts.punctuationPart(54 /* ColonToken */));
+                            displayParts.push(ts.punctuationPart(56 /* ColonToken */));
                             displayParts.push(ts.spacePart());
                             // If the type is type parameter, format it specially
                             if (type.symbol && type.symbol.flags & 262144 /* TypeParameter */) {
@@ -70272,7 +83926,7 @@ var ts;
                             symbolFlags & 16384 /* Constructor */ ||
                             symbolFlags & 131072 /* Signature */ ||
                             symbolFlags & 98304 /* Accessor */ ||
-                            symbolKind === ts.ScriptElementKind.memberFunctionElement) {
+                            symbolKind === "method" /* memberFunctionElement */) {
                             var allSignatures = type.getNonNullableType().getCallSignatures();
                             addSignatureDisplayParts(allSignatures[0], allSignatures);
                         }
@@ -70284,14 +83938,15 @@ var ts;
             }
             if (!documentation) {
                 documentation = symbol.getDocumentationComment();
+                tags = symbol.getJsDocTags();
                 if (documentation.length === 0 && symbol.flags & 4 /* Property */) {
-                    // For some special property access expressions like `experts.foo = foo` or `module.exports.foo = foo`
+                    // For some special property access expressions like `exports.foo = foo` or `module.exports.foo = foo`
                     // there documentation comments might be attached to the right hand side symbol of their declarations.
                     // The pattern of such special property access is that the parent symbol is the symbol of the file.
-                    if (symbol.parent && ts.forEach(symbol.parent.declarations, function (declaration) { return declaration.kind === 256 /* SourceFile */; })) {
+                    if (symbol.parent && ts.forEach(symbol.parent.declarations, function (declaration) { return declaration.kind === 265 /* SourceFile */; })) {
                         for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
                             var declaration = _a[_i];
-                            if (!declaration.parent || declaration.parent.kind !== 187 /* BinaryExpression */) {
+                            if (!declaration.parent || declaration.parent.kind !== 194 /* BinaryExpression */) {
                                 continue;
                             }
                             var rhsSymbol = typeChecker.getSymbolAtLocation(declaration.parent.right);
@@ -70299,6 +83954,7 @@ var ts;
                                 continue;
                             }
                             documentation = rhsSymbol.getDocumentationComment();
+                            tags = rhsSymbol.getJsDocTags();
                             if (documentation.length > 0) {
                                 break;
                             }
@@ -70306,12 +83962,17 @@ var ts;
                     }
                 }
             }
-            return { displayParts: displayParts, documentation: documentation, symbolKind: symbolKind };
+            return { displayParts: displayParts, documentation: documentation, symbolKind: symbolKind, tags: tags };
             function addNewLineIfDisplayPartsExist() {
                 if (displayParts.length) {
                     displayParts.push(ts.lineBreakPart());
                 }
             }
+            function addInPrefix() {
+                displayParts.push(ts.spacePart());
+                displayParts.push(ts.keywordPart(92 /* InKeyword */));
+                displayParts.push(ts.spacePart());
+            }
             function addFullSymbolName(symbol, enclosingDeclaration) {
                 var fullSymbolDisplayParts = ts.symbolToDisplayParts(typeChecker, symbol, enclosingDeclaration || sourceFile, /*meaning*/ undefined, 1 /* WriteTypeParametersOrArguments */ | 2 /* UseOnlyExternalAliasing */);
                 ts.addRange(displayParts, fullSymbolDisplayParts);
@@ -70326,32 +83987,33 @@ var ts;
             }
             function pushTypePart(symbolKind) {
                 switch (symbolKind) {
-                    case ts.ScriptElementKind.variableElement:
-                    case ts.ScriptElementKind.functionElement:
-                    case ts.ScriptElementKind.letElement:
-                    case ts.ScriptElementKind.constElement:
-                    case ts.ScriptElementKind.constructorImplementationElement:
+                    case "var" /* variableElement */:
+                    case "function" /* functionElement */:
+                    case "let" /* letElement */:
+                    case "const" /* constElement */:
+                    case "constructor" /* constructorImplementationElement */:
                         displayParts.push(ts.textOrKeywordPart(symbolKind));
                         return;
                     default:
-                        displayParts.push(ts.punctuationPart(17 /* OpenParenToken */));
+                        displayParts.push(ts.punctuationPart(19 /* OpenParenToken */));
                         displayParts.push(ts.textOrKeywordPart(symbolKind));
-                        displayParts.push(ts.punctuationPart(18 /* CloseParenToken */));
+                        displayParts.push(ts.punctuationPart(20 /* CloseParenToken */));
                         return;
                 }
             }
             function addSignatureDisplayParts(signature, allSignatures, flags) {
-                ts.addRange(displayParts, ts.signatureToDisplayParts(typeChecker, signature, enclosingDeclaration, flags | 32 /* WriteTypeArgumentsOfSignature */));
+                ts.addRange(displayParts, ts.signatureToDisplayParts(typeChecker, signature, enclosingDeclaration, flags | 64 /* WriteTypeArgumentsOfSignature */));
                 if (allSignatures.length > 1) {
                     displayParts.push(ts.spacePart());
-                    displayParts.push(ts.punctuationPart(17 /* OpenParenToken */));
-                    displayParts.push(ts.operatorPart(35 /* PlusToken */));
+                    displayParts.push(ts.punctuationPart(19 /* OpenParenToken */));
+                    displayParts.push(ts.operatorPart(37 /* PlusToken */));
                     displayParts.push(ts.displayPart((allSignatures.length - 1).toString(), ts.SymbolDisplayPartKind.numericLiteral));
                     displayParts.push(ts.spacePart());
                     displayParts.push(ts.textPart(allSignatures.length === 2 ? "overload" : "overloads"));
-                    displayParts.push(ts.punctuationPart(18 /* CloseParenToken */));
+                    displayParts.push(ts.punctuationPart(20 /* CloseParenToken */));
                 }
                 documentation = signature.getDocumentationComment();
+                tags = signature.getJsDocTags();
             }
             function writeTypeParametersOfSymbol(symbol, enclosingDeclaration) {
                 var typeParameterParts = ts.mapToDisplayParts(function (writer) {
@@ -70367,16 +84029,16 @@ var ts;
             }
             return ts.forEach(symbol.declarations, function (declaration) {
                 // Function expressions are local
-                if (declaration.kind === 179 /* FunctionExpression */) {
+                if (declaration.kind === 186 /* FunctionExpression */) {
                     return true;
                 }
-                if (declaration.kind !== 218 /* VariableDeclaration */ && declaration.kind !== 220 /* FunctionDeclaration */) {
+                if (declaration.kind !== 226 /* VariableDeclaration */ && declaration.kind !== 228 /* FunctionDeclaration */) {
                     return false;
                 }
                 // If the parent is not sourceFile or module block it is local variable
-                for (var parent_23 = declaration.parent; !ts.isFunctionBlock(parent_23); parent_23 = parent_23.parent) {
+                for (var parent_25 = declaration.parent; !ts.isFunctionBlock(parent_25); parent_25 = parent_25.parent) {
                     // Reached source file or module block
-                    if (parent_23.kind === 256 /* SourceFile */ || parent_23.kind === 226 /* ModuleBlock */) {
+                    if (parent_25.kind === 265 /* SourceFile */ || parent_25.kind === 234 /* ModuleBlock */) {
                         return false;
                     }
                 }
@@ -70429,7 +84091,7 @@ var ts;
             sourceFile.moduleName = transpileOptions.moduleName;
         }
         if (transpileOptions.renamedDependencies) {
-            sourceFile.renamedDependencies = ts.createMap(transpileOptions.renamedDependencies);
+            sourceFile.renamedDependencies = ts.createMapFromTemplate(transpileOptions.renamedDependencies);
         }
         var newLine = ts.getNewLineCharacter(options);
         // Output
@@ -70437,8 +84099,8 @@ var ts;
         var sourceMapText;
         // Create a compilerHost object to allow the compiler to read and write files
         var compilerHost = {
-            getSourceFile: function (fileName, target) { return fileName === ts.normalizePath(inputFileName) ? sourceFile : undefined; },
-            writeFile: function (name, text, writeByteOrderMark) {
+            getSourceFile: function (fileName) { return fileName === ts.normalizePath(inputFileName) ? sourceFile : undefined; },
+            writeFile: function (name, text) {
                 if (ts.fileExtensionIs(name, ".map")) {
                     ts.Debug.assert(sourceMapText === undefined, "Unexpected multiple source map outputs for the file '" + name + "'");
                     sourceMapText = text;
@@ -70454,9 +84116,9 @@ var ts;
             getCurrentDirectory: function () { return ""; },
             getNewLine: function () { return newLine; },
             fileExists: function (fileName) { return fileName === inputFileName; },
-            readFile: function (fileName) { return ""; },
-            directoryExists: function (directoryExists) { return true; },
-            getDirectories: function (path) { return []; }
+            readFile: function () { return ""; },
+            directoryExists: function () { return true; },
+            getDirectories: function () { return []; }
         };
         var program = ts.createProgram([inputFileName], options, compilerHost);
         if (transpileOptions.reportDiagnostics) {
@@ -70464,7 +84126,7 @@ var ts;
             ts.addRange(/*to*/ diagnostics, /*from*/ program.getOptionsDiagnostics());
         }
         // Emit
-        program.emit();
+        program.emit(/*targetSourceFile*/ undefined, /*writeFile*/ undefined, /*cancellationToken*/ undefined, /*emitOnlyDtsFiles*/ undefined, transpileOptions.transformers);
         ts.Debug.assert(outputText !== undefined, "Output generation failed");
         return { outputText: outputText, diagnostics: diagnostics, sourceMapText: sourceMapText };
     }
@@ -70481,13 +84143,14 @@ var ts;
     ts.transpile = transpile;
     var commandLineOptionsStringToEnum;
     /** JS users may pass in string values for enum compiler options (such as ModuleKind), so convert. */
+    /*@internal*/
     function fixupCompilerOptions(options, diagnostics) {
         // Lazily create this value to fix module loading errors.
         commandLineOptionsStringToEnum = commandLineOptionsStringToEnum || ts.filter(ts.optionDeclarations, function (o) {
-            return typeof o.type === "object" && !ts.forEachProperty(o.type, function (v) { return typeof v !== "number"; });
+            return typeof o.type === "object" && !ts.forEachEntry(o.type, function (v) { return typeof v !== "number"; });
         });
-        options = ts.clone(options);
-        var _loop_2 = function (opt) {
+        options = ts.cloneCompilerOptions(options);
+        var _loop_6 = function (opt) {
             if (!ts.hasProperty(options, opt.name)) {
                 return "continue";
             }
@@ -70498,7 +84161,7 @@ var ts;
                 options[opt.name] = ts.parseCustomTypeOption(opt, value, diagnostics);
             }
             else {
-                if (!ts.forEachProperty(opt.type, function (v) { return v === value; })) {
+                if (!ts.forEachEntry(opt.type, function (v) { return v === value; })) {
                     // Supplied value isn't a valid enum value.
                     diagnostics.push(ts.createCompilerDiagnosticForInvalidCustomType(opt));
                 }
@@ -70506,10 +84169,11 @@ var ts;
         };
         for (var _i = 0, commandLineOptionsStringToEnum_1 = commandLineOptionsStringToEnum; _i < commandLineOptionsStringToEnum_1.length; _i++) {
             var opt = commandLineOptionsStringToEnum_1[_i];
-            _loop_2(opt);
+            _loop_6(opt);
         }
         return options;
     }
+    ts.fixupCompilerOptions = fixupCompilerOptions;
 })(ts || (ts = {}));
 /// <reference path="formatting.ts"/>
 /// <reference path="..\..\compiler\scanner.ts"/>
@@ -70518,8 +84182,8 @@ var ts;
 (function (ts) {
     var formatting;
     (function (formatting) {
-        var standardScanner = ts.createScanner(2 /* Latest */, /*skipTrivia*/ false, 0 /* Standard */);
-        var jsxScanner = ts.createScanner(2 /* Latest */, /*skipTrivia*/ false, 1 /* JSX */);
+        var standardScanner = ts.createScanner(5 /* Latest */, /*skipTrivia*/ false, 0 /* Standard */);
+        var jsxScanner = ts.createScanner(5 /* Latest */, /*skipTrivia*/ false, 1 /* JSX */);
         /**
          * Scanner that is currently used for formatting
          */
@@ -70533,10 +84197,10 @@ var ts;
             ScanAction[ScanAction["RescanJsxIdentifier"] = 4] = "RescanJsxIdentifier";
             ScanAction[ScanAction["RescanJsxText"] = 5] = "RescanJsxText";
         })(ScanAction || (ScanAction = {}));
-        function getFormattingScanner(sourceFile, startPos, endPos) {
-            ts.Debug.assert(scanner === undefined);
-            scanner = sourceFile.languageVariant === 1 /* JSX */ ? jsxScanner : standardScanner;
-            scanner.setText(sourceFile.text);
+        function getFormattingScanner(text, languageVariant, startPos, endPos) {
+            ts.Debug.assert(scanner === undefined, "Scanner should be undefined");
+            scanner = languageVariant === 1 /* JSX */ ? jsxScanner : standardScanner;
+            scanner.setText(text);
             scanner.setTextPos(startPos);
             var wasNewLine = true;
             var leadingTrivia;
@@ -70559,7 +84223,7 @@ var ts;
                 }
             };
             function advance() {
-                ts.Debug.assert(scanner !== undefined);
+                ts.Debug.assert(scanner !== undefined, "Scanner should be present");
                 lastTokenInfo = undefined;
                 var isStarted = scanner.getStartPos() !== startPos;
                 if (isStarted) {
@@ -70601,11 +84265,11 @@ var ts;
             function shouldRescanGreaterThanToken(node) {
                 if (node) {
                     switch (node.kind) {
-                        case 29 /* GreaterThanEqualsToken */:
-                        case 64 /* GreaterThanGreaterThanEqualsToken */:
-                        case 65 /* GreaterThanGreaterThanGreaterThanEqualsToken */:
-                        case 45 /* GreaterThanGreaterThanGreaterThanToken */:
-                        case 44 /* GreaterThanGreaterThanToken */:
+                        case 31 /* GreaterThanEqualsToken */:
+                        case 66 /* GreaterThanGreaterThanEqualsToken */:
+                        case 67 /* GreaterThanGreaterThanGreaterThanEqualsToken */:
+                        case 47 /* GreaterThanGreaterThanGreaterThanToken */:
+                        case 46 /* GreaterThanGreaterThanToken */:
                             return true;
                     }
                 }
@@ -70614,27 +84278,27 @@ var ts;
             function shouldRescanJsxIdentifier(node) {
                 if (node.parent) {
                     switch (node.parent.kind) {
-                        case 246 /* JsxAttribute */:
-                        case 243 /* JsxOpeningElement */:
-                        case 245 /* JsxClosingElement */:
-                        case 242 /* JsxSelfClosingElement */:
-                            return node.kind === 69 /* Identifier */;
+                        case 253 /* JsxAttribute */:
+                        case 251 /* JsxOpeningElement */:
+                        case 252 /* JsxClosingElement */:
+                        case 250 /* JsxSelfClosingElement */:
+                            return node.kind === 71 /* Identifier */;
                     }
                 }
                 return false;
             }
             function shouldRescanJsxText(node) {
-                return node && node.kind === 244 /* JsxText */;
+                return node && node.kind === 10 /* JsxText */;
             }
             function shouldRescanSlashToken(container) {
-                return container.kind === 10 /* RegularExpressionLiteral */;
+                return container.kind === 12 /* RegularExpressionLiteral */;
             }
             function shouldRescanTemplateToken(container) {
-                return container.kind === 13 /* TemplateMiddle */ ||
-                    container.kind === 14 /* TemplateTail */;
+                return container.kind === 15 /* TemplateMiddle */ ||
+                    container.kind === 16 /* TemplateTail */;
             }
             function startsWithSlashToken(t) {
-                return t === 39 /* SlashToken */ || t === 61 /* SlashEqualsToken */;
+                return t === 41 /* SlashToken */ || t === 63 /* SlashEqualsToken */;
             }
             function readTokenInfo(n) {
                 ts.Debug.assert(scanner !== undefined);
@@ -70675,7 +84339,7 @@ var ts;
                     scanner.scan();
                 }
                 var currentToken = scanner.getToken();
-                if (expectedScanAction === 1 /* RescanGreaterThanToken */ && currentToken === 27 /* GreaterThanToken */) {
+                if (expectedScanAction === 1 /* RescanGreaterThanToken */ && currentToken === 29 /* GreaterThanToken */) {
                     currentToken = scanner.reScanGreaterToken();
                     ts.Debug.assert(n.kind === currentToken);
                     lastScanAction = 1 /* RescanGreaterThanToken */;
@@ -70685,11 +84349,11 @@ var ts;
                     ts.Debug.assert(n.kind === currentToken);
                     lastScanAction = 2 /* RescanSlashToken */;
                 }
-                else if (expectedScanAction === 3 /* RescanTemplateToken */ && currentToken === 16 /* CloseBraceToken */) {
+                else if (expectedScanAction === 3 /* RescanTemplateToken */ && currentToken === 18 /* CloseBraceToken */) {
                     currentToken = scanner.reScanTemplateToken();
                     lastScanAction = 3 /* RescanTemplateToken */;
                 }
-                else if (expectedScanAction === 4 /* RescanJsxIdentifier */ && currentToken === 69 /* Identifier */) {
+                else if (expectedScanAction === 4 /* RescanJsxIdentifier */ && currentToken === 71 /* Identifier */) {
                     currentToken = scanner.scanJsxIdentifier();
                     lastScanAction = 4 /* RescanJsxIdentifier */;
                 }
@@ -70738,8 +84402,8 @@ var ts;
             }
             function isOnToken() {
                 ts.Debug.assert(scanner !== undefined);
-                var current = (lastTokenInfo && lastTokenInfo.token.kind) || scanner.getToken();
-                var startPos = (lastTokenInfo && lastTokenInfo.token.pos) || scanner.getStartPos();
+                var current = lastTokenInfo ? lastTokenInfo.token.kind : scanner.getToken();
+                var startPos = lastTokenInfo ? lastTokenInfo.token.pos : scanner.getStartPos();
                 return startPos < endPos && current !== 1 /* EndOfFileToken */ && !ts.isTrivia(current);
             }
             // when containing node in the tree is token
@@ -70772,9 +84436,10 @@ var ts;
     var formatting;
     (function (formatting) {
         var FormattingContext = (function () {
-            function FormattingContext(sourceFile, formattingRequestKind) {
+            function FormattingContext(sourceFile, formattingRequestKind, options) {
                 this.sourceFile = sourceFile;
                 this.formattingRequestKind = formattingRequestKind;
+                this.options = options;
             }
             FormattingContext.prototype.updateContext = function (currentRange, currentTokenParent, nextRange, nextTokenParent, commonParent) {
                 ts.Debug.assert(currentRange !== undefined, "currentTokenSpan is null");
@@ -70832,8 +84497,8 @@ var ts;
                 return startLine === endLine;
             };
             FormattingContext.prototype.BlockIsOnOneLine = function (node) {
-                var openBrace = ts.findChildOfKind(node, 15 /* OpenBraceToken */, this.sourceFile);
-                var closeBrace = ts.findChildOfKind(node, 16 /* CloseBraceToken */, this.sourceFile);
+                var openBrace = ts.findChildOfKind(node, 17 /* OpenBraceToken */, this.sourceFile);
+                var closeBrace = ts.findChildOfKind(node, 18 /* CloseBraceToken */, this.sourceFile);
                 if (openBrace && closeBrace) {
                     var startLine = this.sourceFile.getLineAndCharacterOfPosition(openBrace.getEnd()).line;
                     var endLine = this.sourceFile.getLineAndCharacterOfPosition(closeBrace.getStart(this.sourceFile)).line;
@@ -70852,14 +84517,14 @@ var ts;
 (function (ts) {
     var formatting;
     (function (formatting) {
+        var FormattingRequestKind;
         (function (FormattingRequestKind) {
             FormattingRequestKind[FormattingRequestKind["FormatDocument"] = 0] = "FormatDocument";
             FormattingRequestKind[FormattingRequestKind["FormatSelection"] = 1] = "FormatSelection";
             FormattingRequestKind[FormattingRequestKind["FormatOnEnter"] = 2] = "FormatOnEnter";
             FormattingRequestKind[FormattingRequestKind["FormatOnSemicolon"] = 3] = "FormatOnSemicolon";
             FormattingRequestKind[FormattingRequestKind["FormatOnClosingCurlyBrace"] = 4] = "FormatOnClosingCurlyBrace";
-        })(formatting.FormattingRequestKind || (formatting.FormattingRequestKind = {}));
-        var FormattingRequestKind = formatting.FormattingRequestKind;
+        })(FormattingRequestKind = formatting.FormattingRequestKind || (formatting.FormattingRequestKind = {}));
     })(formatting = ts.formatting || (ts.formatting = {}));
 })(ts || (ts = {}));
 ///<reference path='references.ts' />
@@ -70880,24 +84545,720 @@ var ts;
                     "operation=" + this.Operation + "," +
                     "flag=" + this.Flag + "]";
             };
-            return Rule;
+            return Rule;
+        }());
+        formatting.Rule = Rule;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+///<reference path='references.ts' />
+/* @internal */
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var RuleAction;
+        (function (RuleAction) {
+            RuleAction[RuleAction["Ignore"] = 1] = "Ignore";
+            RuleAction[RuleAction["Space"] = 2] = "Space";
+            RuleAction[RuleAction["NewLine"] = 4] = "NewLine";
+            RuleAction[RuleAction["Delete"] = 8] = "Delete";
+        })(RuleAction = formatting.RuleAction || (formatting.RuleAction = {}));
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+///<reference path='references.ts' />
+/* @internal */
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var RuleDescriptor = (function () {
+            function RuleDescriptor(LeftTokenRange, RightTokenRange) {
+                this.LeftTokenRange = LeftTokenRange;
+                this.RightTokenRange = RightTokenRange;
+            }
+            RuleDescriptor.prototype.toString = function () {
+                return "[leftRange=" + this.LeftTokenRange + "," +
+                    "rightRange=" + this.RightTokenRange + "]";
+            };
+            RuleDescriptor.create1 = function (left, right) {
+                return RuleDescriptor.create4(formatting.Shared.TokenRange.FromToken(left), formatting.Shared.TokenRange.FromToken(right));
+            };
+            RuleDescriptor.create2 = function (left, right) {
+                return RuleDescriptor.create4(left, formatting.Shared.TokenRange.FromToken(right));
+            };
+            RuleDescriptor.create3 = function (left, right) {
+                return RuleDescriptor.create4(formatting.Shared.TokenRange.FromToken(left), right);
+            };
+            RuleDescriptor.create4 = function (left, right) {
+                return new RuleDescriptor(left, right);
+            };
+            return RuleDescriptor;
+        }());
+        formatting.RuleDescriptor = RuleDescriptor;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+///<reference path='references.ts' />
+/* @internal */
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var RuleFlags;
+        (function (RuleFlags) {
+            RuleFlags[RuleFlags["None"] = 0] = "None";
+            RuleFlags[RuleFlags["CanDeleteNewLines"] = 1] = "CanDeleteNewLines";
+        })(RuleFlags = formatting.RuleFlags || (formatting.RuleFlags = {}));
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+///<reference path='references.ts' />
+/* @internal */
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var RuleOperation = (function () {
+            function RuleOperation(Context, Action) {
+                this.Context = Context;
+                this.Action = Action;
+            }
+            RuleOperation.prototype.toString = function () {
+                return "[context=" + this.Context + "," +
+                    "action=" + this.Action + "]";
+            };
+            RuleOperation.create1 = function (action) {
+                return RuleOperation.create2(formatting.RuleOperationContext.Any, action);
+            };
+            RuleOperation.create2 = function (context, action) {
+                return new RuleOperation(context, action);
+            };
+            return RuleOperation;
+        }());
+        formatting.RuleOperation = RuleOperation;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+///<reference path='references.ts' />
+/* @internal */
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var RuleOperationContext = (function () {
+            function RuleOperationContext() {
+                var funcs = [];
+                for (var _i = 0; _i < arguments.length; _i++) {
+                    funcs[_i] = arguments[_i];
+                }
+                this.customContextChecks = funcs;
+            }
+            RuleOperationContext.prototype.IsAny = function () {
+                return this === RuleOperationContext.Any;
+            };
+            RuleOperationContext.prototype.InContext = function (context) {
+                if (this.IsAny()) {
+                    return true;
+                }
+                for (var _i = 0, _a = this.customContextChecks; _i < _a.length; _i++) {
+                    var check = _a[_i];
+                    if (!check(context)) {
+                        return false;
+                    }
+                }
+                return true;
+            };
+            return RuleOperationContext;
+        }());
+        RuleOperationContext.Any = new RuleOperationContext();
+        formatting.RuleOperationContext = RuleOperationContext;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+///<reference path='references.ts' />
+/* @internal */
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var Rules = (function () {
+            function Rules() {
+                ///
+                /// Common Rules
+                ///
+                // Leave comments alone
+                this.IgnoreBeforeComment = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.Comments), formatting.RuleOperation.create1(1 /* Ignore */));
+                this.IgnoreAfterLineComment = new formatting.Rule(formatting.RuleDescriptor.create3(2 /* SingleLineCommentTrivia */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create1(1 /* Ignore */));
+                // Space after keyword but not before ; or : or ?
+                this.NoSpaceBeforeSemicolon = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 25 /* SemicolonToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceBeforeColon = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 56 /* ColonToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 8 /* Delete */));
+                this.NoSpaceBeforeQuestionMark = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 55 /* QuestionToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 8 /* Delete */));
+                this.SpaceAfterColon = new formatting.Rule(formatting.RuleDescriptor.create3(56 /* ColonToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 2 /* Space */));
+                this.SpaceAfterQuestionMarkInConditionalOperator = new formatting.Rule(formatting.RuleDescriptor.create3(55 /* QuestionToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsConditionalOperatorContext), 2 /* Space */));
+                this.NoSpaceAfterQuestionMark = new formatting.Rule(formatting.RuleDescriptor.create3(55 /* QuestionToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.SpaceAfterSemicolon = new formatting.Rule(formatting.RuleDescriptor.create3(25 /* SemicolonToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                // Space after }.
+                this.SpaceAfterCloseBrace = new formatting.Rule(formatting.RuleDescriptor.create3(18 /* CloseBraceToken */, formatting.Shared.TokenRange.FromRange(0 /* FirstToken */, 142 /* LastToken */, [20 /* CloseParenToken */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsAfterCodeBlockContext), 2 /* Space */));
+                // Special case for (}, else) and (}, while) since else & while tokens are not part of the tree which makes SpaceAfterCloseBrace rule not applied
+                this.SpaceBetweenCloseBraceAndElse = new formatting.Rule(formatting.RuleDescriptor.create1(18 /* CloseBraceToken */, 82 /* ElseKeyword */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.SpaceBetweenCloseBraceAndWhile = new formatting.Rule(formatting.RuleDescriptor.create1(18 /* CloseBraceToken */, 106 /* WhileKeyword */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.NoSpaceAfterCloseBrace = new formatting.Rule(formatting.RuleDescriptor.create3(18 /* CloseBraceToken */, formatting.Shared.TokenRange.FromTokens([22 /* CloseBracketToken */, 26 /* CommaToken */, 25 /* SemicolonToken */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                // No space for dot
+                this.NoSpaceBeforeDot = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 23 /* DotToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceAfterDot = new formatting.Rule(formatting.RuleDescriptor.create3(23 /* DotToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                // No space before and after indexer
+                this.NoSpaceBeforeOpenBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.AnyExcept(120 /* AsyncKeyword */), 21 /* OpenBracketToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceAfterCloseBracket = new formatting.Rule(formatting.RuleDescriptor.create3(22 /* CloseBracketToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBeforeBlockInFunctionDeclarationContext), 8 /* Delete */));
+                // Place a space before open brace in a function declaration
+                this.FunctionOpenBraceLeftTokenRange = formatting.Shared.TokenRange.AnyIncludingMultilineComments;
+                this.SpaceBeforeOpenBraceInFunction = new formatting.Rule(formatting.RuleDescriptor.create2(this.FunctionOpenBraceLeftTokenRange, 17 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext, Rules.IsBeforeBlockContext, Rules.IsNotFormatOnEnter, Rules.IsSameLineTokenOrBeforeMultilineBlockContext), 2 /* Space */), 1 /* CanDeleteNewLines */);
+                // Place a space before open brace in a TypeScript declaration that has braces as children (class, module, enum, etc)
+                this.TypeScriptOpenBraceLeftTokenRange = formatting.Shared.TokenRange.FromTokens([71 /* Identifier */, 3 /* MultiLineCommentTrivia */, 75 /* ClassKeyword */, 84 /* ExportKeyword */, 91 /* ImportKeyword */]);
+                this.SpaceBeforeOpenBraceInTypeScriptDeclWithBlock = new formatting.Rule(formatting.RuleDescriptor.create2(this.TypeScriptOpenBraceLeftTokenRange, 17 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsTypeScriptDeclWithBlockContext, Rules.IsNotFormatOnEnter, Rules.IsSameLineTokenOrBeforeMultilineBlockContext), 2 /* Space */), 1 /* CanDeleteNewLines */);
+                // Place a space before open brace in a control flow construct
+                this.ControlOpenBraceLeftTokenRange = formatting.Shared.TokenRange.FromTokens([20 /* CloseParenToken */, 3 /* MultiLineCommentTrivia */, 81 /* DoKeyword */, 102 /* TryKeyword */, 87 /* FinallyKeyword */, 82 /* ElseKeyword */]);
+                this.SpaceBeforeOpenBraceInControl = new formatting.Rule(formatting.RuleDescriptor.create2(this.ControlOpenBraceLeftTokenRange, 17 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsControlDeclContext, Rules.IsNotFormatOnEnter, Rules.IsSameLineTokenOrBeforeMultilineBlockContext), 2 /* Space */), 1 /* CanDeleteNewLines */);
+                // Insert a space after { and before } in single-line contexts, but remove space from empty object literals {}.
+                this.SpaceAfterOpenBrace = new formatting.Rule(formatting.RuleDescriptor.create3(17 /* OpenBraceToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionEnabledOrUndefined("insertSpaceAfterOpeningAndBeforeClosingNonemptyBraces"), Rules.IsBraceWrappedContext), 2 /* Space */));
+                this.SpaceBeforeCloseBrace = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 18 /* CloseBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionEnabledOrUndefined("insertSpaceAfterOpeningAndBeforeClosingNonemptyBraces"), Rules.IsBraceWrappedContext), 2 /* Space */));
+                this.NoSpaceAfterOpenBrace = new formatting.Rule(formatting.RuleDescriptor.create3(17 /* OpenBraceToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionDisabled("insertSpaceAfterOpeningAndBeforeClosingNonemptyBraces"), Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceBeforeCloseBrace = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 18 /* CloseBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionDisabled("insertSpaceAfterOpeningAndBeforeClosingNonemptyBraces"), Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceBetweenEmptyBraceBrackets = new formatting.Rule(formatting.RuleDescriptor.create1(17 /* OpenBraceToken */, 18 /* CloseBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsObjectContext), 8 /* Delete */));
+                // Insert new line after { and before } in multi-line contexts.
+                this.NewLineAfterOpenBraceInBlockContext = new formatting.Rule(formatting.RuleDescriptor.create3(17 /* OpenBraceToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsMultilineBlockContext), 4 /* NewLine */));
+                // For functions and control block place } on a new line    [multi-line rule]
+                this.NewLineBeforeCloseBraceInBlockContext = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.AnyIncludingMultilineComments, 18 /* CloseBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsMultilineBlockContext), 4 /* NewLine */));
+                // Special handling of unary operators.
+                // Prefix operators generally shouldn't have a space between
+                // them and their target unary expression.
+                this.NoSpaceAfterUnaryPrefixOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.UnaryPrefixOperators, formatting.Shared.TokenRange.UnaryPrefixExpressions), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 8 /* Delete */));
+                this.NoSpaceAfterUnaryPreincrementOperator = new formatting.Rule(formatting.RuleDescriptor.create3(43 /* PlusPlusToken */, formatting.Shared.TokenRange.UnaryPreincrementExpressions), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceAfterUnaryPredecrementOperator = new formatting.Rule(formatting.RuleDescriptor.create3(44 /* MinusMinusToken */, formatting.Shared.TokenRange.UnaryPredecrementExpressions), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceBeforeUnaryPostincrementOperator = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.UnaryPostincrementExpressions, 43 /* PlusPlusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceBeforeUnaryPostdecrementOperator = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.UnaryPostdecrementExpressions, 44 /* MinusMinusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                // More unary operator special-casing.
+                // DevDiv 181814:  Be careful when removing leading whitespace
+                // around unary operators.  Examples:
+                //      1 - -2  --X-->  1--2
+                //      a + ++b --X-->  a+++b
+                this.SpaceAfterPostincrementWhenFollowedByAdd = new formatting.Rule(formatting.RuleDescriptor.create1(43 /* PlusPlusToken */, 37 /* PlusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
+                this.SpaceAfterAddWhenFollowedByUnaryPlus = new formatting.Rule(formatting.RuleDescriptor.create1(37 /* PlusToken */, 37 /* PlusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
+                this.SpaceAfterAddWhenFollowedByPreincrement = new formatting.Rule(formatting.RuleDescriptor.create1(37 /* PlusToken */, 43 /* PlusPlusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
+                this.SpaceAfterPostdecrementWhenFollowedBySubtract = new formatting.Rule(formatting.RuleDescriptor.create1(44 /* MinusMinusToken */, 38 /* MinusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
+                this.SpaceAfterSubtractWhenFollowedByUnaryMinus = new formatting.Rule(formatting.RuleDescriptor.create1(38 /* MinusToken */, 38 /* MinusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
+                this.SpaceAfterSubtractWhenFollowedByPredecrement = new formatting.Rule(formatting.RuleDescriptor.create1(38 /* MinusToken */, 44 /* MinusMinusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
+                this.NoSpaceBeforeComma = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 26 /* CommaToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.SpaceAfterCertainKeywords = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([104 /* VarKeyword */, 100 /* ThrowKeyword */, 94 /* NewKeyword */, 80 /* DeleteKeyword */, 96 /* ReturnKeyword */, 103 /* TypeOfKeyword */, 121 /* AwaitKeyword */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.NoSpaceAfterNewKeywordOnConstructorSignature = new formatting.Rule(formatting.RuleDescriptor.create1(94 /* NewKeyword */, 19 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsConstructorSignatureContext), 8 /* Delete */));
+                this.SpaceAfterLetConstInVariableDeclaration = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([110 /* LetKeyword */, 76 /* ConstKeyword */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsStartOfVariableDeclarationList), 2 /* Space */));
+                this.NoSpaceBeforeOpenParenInFuncCall = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 19 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsFunctionCallOrNewContext, Rules.IsPreviousTokenNotComma), 8 /* Delete */));
+                this.SpaceAfterFunctionInFuncDecl = new formatting.Rule(formatting.RuleDescriptor.create3(89 /* FunctionKeyword */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext), 2 /* Space */));
+                this.SpaceBeforeOpenParenInFuncDecl = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 19 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionEnabled("insertSpaceBeforeFunctionParenthesis"), Rules.IsNonJsxSameLineTokenContext, Rules.IsFunctionDeclContext), 2 /* Space */));
+                this.NoSpaceBeforeOpenParenInFuncDecl = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 19 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceBeforeFunctionParenthesis"), Rules.IsNonJsxSameLineTokenContext, Rules.IsFunctionDeclContext), 8 /* Delete */));
+                this.SpaceAfterVoidOperator = new formatting.Rule(formatting.RuleDescriptor.create3(105 /* VoidKeyword */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsVoidOpContext), 2 /* Space */));
+                this.NoSpaceBetweenReturnAndSemicolon = new formatting.Rule(formatting.RuleDescriptor.create1(96 /* ReturnKeyword */, 25 /* SemicolonToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                // Add a space between statements. All keywords except (do,else,case) has open/close parens after them.
+                // So, we have a rule to add a space for [),Any], [do,Any], [else,Any], and [case,Any]
+                this.SpaceBetweenStatements = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([20 /* CloseParenToken */, 81 /* DoKeyword */, 82 /* ElseKeyword */, 73 /* CaseKeyword */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNonJsxElementContext, Rules.IsNotForContext), 2 /* Space */));
+                // This low-pri rule takes care of "try {" and "finally {" in case the rule SpaceBeforeOpenBraceInControl didn't execute on FormatOnEnter.
+                this.SpaceAfterTryFinally = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.FromTokens([102 /* TryKeyword */, 87 /* FinallyKeyword */]), 17 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                //      get x() {}
+                //      set x(val) {}
+                this.SpaceAfterGetSetInMember = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.FromTokens([125 /* GetKeyword */, 135 /* SetKeyword */]), 71 /* Identifier */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext), 2 /* Space */));
+                // Special case for binary operators (that are keywords). For these we have to add a space and shouldn't follow any user options.
+                this.SpaceBeforeBinaryKeywordOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.BinaryKeywordOperators), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
+                this.SpaceAfterBinaryKeywordOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.BinaryKeywordOperators, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
+                // TypeScript-specific higher priority rules
+                this.SpaceAfterConstructor = new formatting.Rule(formatting.RuleDescriptor.create1(123 /* ConstructorKeyword */, 19 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionEnabled("insertSpaceAfterConstructor"), Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.NoSpaceAfterConstructor = new formatting.Rule(formatting.RuleDescriptor.create1(123 /* ConstructorKeyword */, 19 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceAfterConstructor"), Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                // Use of module as a function call. e.g.: import m2 = module("m2");
+                this.NoSpaceAfterModuleImport = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.FromTokens([128 /* ModuleKeyword */, 132 /* RequireKeyword */]), 19 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                // Add a space around certain TypeScript keywords
+                this.SpaceAfterCertainTypeScriptKeywords = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([117 /* AbstractKeyword */, 75 /* ClassKeyword */, 124 /* DeclareKeyword */, 79 /* DefaultKeyword */, 83 /* EnumKeyword */, 84 /* ExportKeyword */, 85 /* ExtendsKeyword */, 125 /* GetKeyword */, 108 /* ImplementsKeyword */, 91 /* ImportKeyword */, 109 /* InterfaceKeyword */, 128 /* ModuleKeyword */, 129 /* NamespaceKeyword */, 112 /* PrivateKeyword */, 114 /* PublicKeyword */, 113 /* ProtectedKeyword */, 131 /* ReadonlyKeyword */, 135 /* SetKeyword */, 115 /* StaticKeyword */, 138 /* TypeKeyword */, 140 /* FromKeyword */, 127 /* KeyOfKeyword */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.SpaceBeforeCertainTypeScriptKeywords = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.FromTokens([85 /* ExtendsKeyword */, 108 /* ImplementsKeyword */, 140 /* FromKeyword */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                // Treat string literals in module names as identifiers, and add a space between the literal and the opening Brace braces, e.g.: module "m2" {
+                this.SpaceAfterModuleName = new formatting.Rule(formatting.RuleDescriptor.create1(9 /* StringLiteral */, 17 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsModuleDeclContext), 2 /* Space */));
+                // Lambda expressions
+                this.SpaceBeforeArrow = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 36 /* EqualsGreaterThanToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.SpaceAfterArrow = new formatting.Rule(formatting.RuleDescriptor.create3(36 /* EqualsGreaterThanToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                // Optional parameters and let args
+                this.NoSpaceAfterEllipsis = new formatting.Rule(formatting.RuleDescriptor.create1(24 /* DotDotDotToken */, 71 /* Identifier */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceAfterOptionalParameters = new formatting.Rule(formatting.RuleDescriptor.create3(55 /* QuestionToken */, formatting.Shared.TokenRange.FromTokens([20 /* CloseParenToken */, 26 /* CommaToken */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 8 /* Delete */));
+                // generics and type assertions
+                this.NoSpaceBeforeOpenAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.TypeNames, 27 /* LessThanToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8 /* Delete */));
+                this.NoSpaceBetweenCloseParenAndAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create1(20 /* CloseParenToken */, 27 /* LessThanToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8 /* Delete */));
+                this.NoSpaceAfterOpenAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create3(27 /* LessThanToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8 /* Delete */));
+                this.NoSpaceBeforeCloseAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 29 /* GreaterThanToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8 /* Delete */));
+                this.NoSpaceAfterCloseAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create3(29 /* GreaterThanToken */, formatting.Shared.TokenRange.FromTokens([19 /* OpenParenToken */, 21 /* OpenBracketToken */, 29 /* GreaterThanToken */, 26 /* CommaToken */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8 /* Delete */));
+                // Remove spaces in empty interface literals. e.g.: x: {}
+                this.NoSpaceBetweenEmptyInterfaceBraceBrackets = new formatting.Rule(formatting.RuleDescriptor.create1(17 /* OpenBraceToken */, 18 /* CloseBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsObjectTypeContext), 8 /* Delete */));
+                // decorators
+                this.SpaceBeforeAt = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 57 /* AtToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.NoSpaceAfterAt = new formatting.Rule(formatting.RuleDescriptor.create3(57 /* AtToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.SpaceAfterDecorator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.FromTokens([117 /* AbstractKeyword */, 71 /* Identifier */, 84 /* ExportKeyword */, 79 /* DefaultKeyword */, 75 /* ClassKeyword */, 115 /* StaticKeyword */, 114 /* PublicKeyword */, 112 /* PrivateKeyword */, 113 /* ProtectedKeyword */, 125 /* GetKeyword */, 135 /* SetKeyword */, 21 /* OpenBracketToken */, 39 /* AsteriskToken */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsEndOfDecoratorContextOnSameLine), 2 /* Space */));
+                this.NoSpaceBetweenFunctionKeywordAndStar = new formatting.Rule(formatting.RuleDescriptor.create1(89 /* FunctionKeyword */, 39 /* AsteriskToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclarationOrFunctionExpressionContext), 8 /* Delete */));
+                this.SpaceAfterStarInGeneratorDeclaration = new formatting.Rule(formatting.RuleDescriptor.create3(39 /* AsteriskToken */, formatting.Shared.TokenRange.FromTokens([71 /* Identifier */, 19 /* OpenParenToken */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclarationOrFunctionExpressionContext), 2 /* Space */));
+                this.NoSpaceBetweenYieldKeywordAndStar = new formatting.Rule(formatting.RuleDescriptor.create1(116 /* YieldKeyword */, 39 /* AsteriskToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsYieldOrYieldStarWithOperand), 8 /* Delete */));
+                this.SpaceBetweenYieldOrYieldStarAndOperand = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([116 /* YieldKeyword */, 39 /* AsteriskToken */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsYieldOrYieldStarWithOperand), 2 /* Space */));
+                // Async-await
+                this.SpaceBetweenAsyncAndOpenParen = new formatting.Rule(formatting.RuleDescriptor.create1(120 /* AsyncKeyword */, 19 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsArrowFunctionContext, Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.SpaceBetweenAsyncAndFunctionKeyword = new formatting.Rule(formatting.RuleDescriptor.create1(120 /* AsyncKeyword */, 89 /* FunctionKeyword */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                // template string
+                this.NoSpaceBetweenTagAndTemplateString = new formatting.Rule(formatting.RuleDescriptor.create3(71 /* Identifier */, formatting.Shared.TokenRange.FromTokens([13 /* NoSubstitutionTemplateLiteral */, 14 /* TemplateHead */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                // jsx opening element
+                this.SpaceBeforeJsxAttribute = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 71 /* Identifier */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNextTokenParentJsxAttribute, Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.SpaceBeforeSlashInJsxOpeningElement = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 41 /* SlashToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsJsxSelfClosingElementContext, Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.NoSpaceBeforeGreaterThanTokenInJsxOpeningElement = new formatting.Rule(formatting.RuleDescriptor.create1(41 /* SlashToken */, 29 /* GreaterThanToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsJsxSelfClosingElementContext, Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceBeforeEqualInJsxAttribute = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 58 /* EqualsToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsJsxAttributeContext, Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceAfterEqualInJsxAttribute = new formatting.Rule(formatting.RuleDescriptor.create3(58 /* EqualsToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsJsxAttributeContext, Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                // No space before non-null assertion operator
+                this.NoSpaceBeforeNonNullAssertionOperator = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 51 /* ExclamationToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNonNullAssertionContext), 8 /* Delete */));
+                ///
+                /// Rules controlled by user options
+                ///
+                // Insert space after comma delimiter
+                this.SpaceAfterComma = new formatting.Rule(formatting.RuleDescriptor.create3(26 /* CommaToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionEnabled("insertSpaceAfterCommaDelimiter"), Rules.IsNonJsxSameLineTokenContext, Rules.IsNonJsxElementContext, Rules.IsNextTokenNotCloseBracket), 2 /* Space */));
+                this.NoSpaceAfterComma = new formatting.Rule(formatting.RuleDescriptor.create3(26 /* CommaToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceAfterCommaDelimiter"), Rules.IsNonJsxSameLineTokenContext, Rules.IsNonJsxElementContext), 8 /* Delete */));
+                // Insert space before and after binary operators
+                this.SpaceBeforeBinaryOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.BinaryOperators), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionEnabled("insertSpaceBeforeAndAfterBinaryOperators"), Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
+                this.SpaceAfterBinaryOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.BinaryOperators, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionEnabled("insertSpaceBeforeAndAfterBinaryOperators"), Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
+                this.NoSpaceBeforeBinaryOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.BinaryOperators), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceBeforeAndAfterBinaryOperators"), Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 8 /* Delete */));
+                this.NoSpaceAfterBinaryOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.BinaryOperators, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceBeforeAndAfterBinaryOperators"), Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 8 /* Delete */));
+                // Insert space after keywords in control flow statements
+                this.SpaceAfterKeywordInControl = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Keywords, 19 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionEnabled("insertSpaceAfterKeywordsInControlFlowStatements"), Rules.IsControlDeclContext), 2 /* Space */));
+                this.NoSpaceAfterKeywordInControl = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Keywords, 19 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceAfterKeywordsInControlFlowStatements"), Rules.IsControlDeclContext), 8 /* Delete */));
+                // Open Brace braces after function
+                // TypeScript: Function can have return types, which can be made of tons of different token kinds
+                this.NewLineBeforeOpenBraceInFunction = new formatting.Rule(formatting.RuleDescriptor.create2(this.FunctionOpenBraceLeftTokenRange, 17 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionEnabled("placeOpenBraceOnNewLineForFunctions"), Rules.IsFunctionDeclContext, Rules.IsBeforeMultilineBlockContext), 4 /* NewLine */), 1 /* CanDeleteNewLines */);
+                // Open Brace braces after TypeScript module/class/interface
+                this.NewLineBeforeOpenBraceInTypeScriptDeclWithBlock = new formatting.Rule(formatting.RuleDescriptor.create2(this.TypeScriptOpenBraceLeftTokenRange, 17 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionEnabled("placeOpenBraceOnNewLineForFunctions"), Rules.IsTypeScriptDeclWithBlockContext, Rules.IsBeforeMultilineBlockContext), 4 /* NewLine */), 1 /* CanDeleteNewLines */);
+                // Open Brace braces after control block
+                this.NewLineBeforeOpenBraceInControl = new formatting.Rule(formatting.RuleDescriptor.create2(this.ControlOpenBraceLeftTokenRange, 17 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionEnabled("placeOpenBraceOnNewLineForControlBlocks"), Rules.IsControlDeclContext, Rules.IsBeforeMultilineBlockContext), 4 /* NewLine */), 1 /* CanDeleteNewLines */);
+                // Insert space after semicolon in for statement
+                this.SpaceAfterSemicolonInFor = new formatting.Rule(formatting.RuleDescriptor.create3(25 /* SemicolonToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionEnabled("insertSpaceAfterSemicolonInForStatements"), Rules.IsNonJsxSameLineTokenContext, Rules.IsForContext), 2 /* Space */));
+                this.NoSpaceAfterSemicolonInFor = new formatting.Rule(formatting.RuleDescriptor.create3(25 /* SemicolonToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceAfterSemicolonInForStatements"), Rules.IsNonJsxSameLineTokenContext, Rules.IsForContext), 8 /* Delete */));
+                // Insert space after opening and before closing nonempty parenthesis
+                this.SpaceAfterOpenParen = new formatting.Rule(formatting.RuleDescriptor.create3(19 /* OpenParenToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionEnabled("insertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis"), Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.SpaceBeforeCloseParen = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 20 /* CloseParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionEnabled("insertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis"), Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.NoSpaceBetweenParens = new formatting.Rule(formatting.RuleDescriptor.create1(19 /* OpenParenToken */, 20 /* CloseParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceAfterOpenParen = new formatting.Rule(formatting.RuleDescriptor.create3(19 /* OpenParenToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis"), Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceBeforeCloseParen = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 20 /* CloseParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis"), Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                // Insert space after opening and before closing nonempty brackets
+                this.SpaceAfterOpenBracket = new formatting.Rule(formatting.RuleDescriptor.create3(21 /* OpenBracketToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionEnabled("insertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets"), Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.SpaceBeforeCloseBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 22 /* CloseBracketToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionEnabled("insertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets"), Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.NoSpaceBetweenBrackets = new formatting.Rule(formatting.RuleDescriptor.create1(21 /* OpenBracketToken */, 22 /* CloseBracketToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceAfterOpenBracket = new formatting.Rule(formatting.RuleDescriptor.create3(21 /* OpenBracketToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets"), Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceBeforeCloseBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 22 /* CloseBracketToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets"), Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                // Insert space after opening and before closing template string braces
+                this.NoSpaceAfterTemplateHeadAndMiddle = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([14 /* TemplateHead */, 15 /* TemplateMiddle */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces"), Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.SpaceAfterTemplateHeadAndMiddle = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([14 /* TemplateHead */, 15 /* TemplateMiddle */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionEnabled("insertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces"), Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.NoSpaceBeforeTemplateMiddleAndTail = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.FromTokens([15 /* TemplateMiddle */, 16 /* TemplateTail */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces"), Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.SpaceBeforeTemplateMiddleAndTail = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.FromTokens([15 /* TemplateMiddle */, 16 /* TemplateTail */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionEnabled("insertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces"), Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                // No space after { and before } in JSX expression
+                this.NoSpaceAfterOpenBraceInJsxExpression = new formatting.Rule(formatting.RuleDescriptor.create3(17 /* OpenBraceToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceAfterOpeningAndBeforeClosingJsxExpressionBraces"), Rules.IsNonJsxSameLineTokenContext, Rules.IsJsxExpressionContext), 8 /* Delete */));
+                this.SpaceAfterOpenBraceInJsxExpression = new formatting.Rule(formatting.RuleDescriptor.create3(17 /* OpenBraceToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionEnabled("insertSpaceAfterOpeningAndBeforeClosingJsxExpressionBraces"), Rules.IsNonJsxSameLineTokenContext, Rules.IsJsxExpressionContext), 2 /* Space */));
+                this.NoSpaceBeforeCloseBraceInJsxExpression = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 18 /* CloseBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceAfterOpeningAndBeforeClosingJsxExpressionBraces"), Rules.IsNonJsxSameLineTokenContext, Rules.IsJsxExpressionContext), 8 /* Delete */));
+                this.SpaceBeforeCloseBraceInJsxExpression = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 18 /* CloseBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionEnabled("insertSpaceAfterOpeningAndBeforeClosingJsxExpressionBraces"), Rules.IsNonJsxSameLineTokenContext, Rules.IsJsxExpressionContext), 2 /* Space */));
+                // Insert space after function keyword for anonymous functions
+                this.SpaceAfterAnonymousFunctionKeyword = new formatting.Rule(formatting.RuleDescriptor.create1(89 /* FunctionKeyword */, 19 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionEnabled("insertSpaceAfterFunctionKeywordForAnonymousFunctions"), Rules.IsFunctionDeclContext), 2 /* Space */));
+                this.NoSpaceAfterAnonymousFunctionKeyword = new formatting.Rule(formatting.RuleDescriptor.create1(89 /* FunctionKeyword */, 19 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceAfterFunctionKeywordForAnonymousFunctions"), Rules.IsFunctionDeclContext), 8 /* Delete */));
+                // No space after type assertion
+                this.NoSpaceAfterTypeAssertion = new formatting.Rule(formatting.RuleDescriptor.create3(29 /* GreaterThanToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceAfterTypeAssertion"), Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeAssertionContext), 8 /* Delete */));
+                this.SpaceAfterTypeAssertion = new formatting.Rule(formatting.RuleDescriptor.create3(29 /* GreaterThanToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsOptionEnabled("insertSpaceAfterTypeAssertion"), Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeAssertionContext), 2 /* Space */));
+                // These rules are higher in priority than user-configurable rules.
+                this.HighPriorityCommonRules = [
+                    this.IgnoreBeforeComment, this.IgnoreAfterLineComment,
+                    this.NoSpaceBeforeColon, this.SpaceAfterColon, this.NoSpaceBeforeQuestionMark, this.SpaceAfterQuestionMarkInConditionalOperator,
+                    this.NoSpaceAfterQuestionMark,
+                    this.NoSpaceBeforeDot, this.NoSpaceAfterDot,
+                    this.NoSpaceAfterUnaryPrefixOperator,
+                    this.NoSpaceAfterUnaryPreincrementOperator, this.NoSpaceAfterUnaryPredecrementOperator,
+                    this.NoSpaceBeforeUnaryPostincrementOperator, this.NoSpaceBeforeUnaryPostdecrementOperator,
+                    this.SpaceAfterPostincrementWhenFollowedByAdd,
+                    this.SpaceAfterAddWhenFollowedByUnaryPlus, this.SpaceAfterAddWhenFollowedByPreincrement,
+                    this.SpaceAfterPostdecrementWhenFollowedBySubtract,
+                    this.SpaceAfterSubtractWhenFollowedByUnaryMinus, this.SpaceAfterSubtractWhenFollowedByPredecrement,
+                    this.NoSpaceAfterCloseBrace,
+                    this.NewLineBeforeCloseBraceInBlockContext,
+                    this.SpaceAfterCloseBrace, this.SpaceBetweenCloseBraceAndElse, this.SpaceBetweenCloseBraceAndWhile, this.NoSpaceBetweenEmptyBraceBrackets,
+                    this.NoSpaceBetweenFunctionKeywordAndStar, this.SpaceAfterStarInGeneratorDeclaration,
+                    this.SpaceAfterFunctionInFuncDecl, this.NewLineAfterOpenBraceInBlockContext, this.SpaceAfterGetSetInMember,
+                    this.NoSpaceBetweenYieldKeywordAndStar, this.SpaceBetweenYieldOrYieldStarAndOperand,
+                    this.NoSpaceBetweenReturnAndSemicolon,
+                    this.SpaceAfterCertainKeywords,
+                    this.SpaceAfterLetConstInVariableDeclaration,
+                    this.NoSpaceBeforeOpenParenInFuncCall,
+                    this.SpaceBeforeBinaryKeywordOperator, this.SpaceAfterBinaryKeywordOperator,
+                    this.SpaceAfterVoidOperator,
+                    this.SpaceBetweenAsyncAndOpenParen, this.SpaceBetweenAsyncAndFunctionKeyword,
+                    this.NoSpaceBetweenTagAndTemplateString,
+                    this.SpaceBeforeJsxAttribute, this.SpaceBeforeSlashInJsxOpeningElement, this.NoSpaceBeforeGreaterThanTokenInJsxOpeningElement,
+                    this.NoSpaceBeforeEqualInJsxAttribute, this.NoSpaceAfterEqualInJsxAttribute,
+                    // TypeScript-specific rules
+                    this.NoSpaceAfterModuleImport,
+                    this.SpaceAfterCertainTypeScriptKeywords, this.SpaceBeforeCertainTypeScriptKeywords,
+                    this.SpaceAfterModuleName,
+                    this.SpaceBeforeArrow, this.SpaceAfterArrow,
+                    this.NoSpaceAfterEllipsis,
+                    this.NoSpaceAfterOptionalParameters,
+                    this.NoSpaceBetweenEmptyInterfaceBraceBrackets,
+                    this.NoSpaceBeforeOpenAngularBracket,
+                    this.NoSpaceBetweenCloseParenAndAngularBracket,
+                    this.NoSpaceAfterOpenAngularBracket,
+                    this.NoSpaceBeforeCloseAngularBracket,
+                    this.NoSpaceAfterCloseAngularBracket,
+                    this.SpaceBeforeAt,
+                    this.NoSpaceAfterAt,
+                    this.SpaceAfterDecorator,
+                    this.NoSpaceBeforeNonNullAssertionOperator,
+                    this.NoSpaceAfterNewKeywordOnConstructorSignature
+                ];
+                // These rules are applied after high priority rules.
+                this.UserConfigurableRules = [
+                    this.SpaceAfterConstructor, this.NoSpaceAfterConstructor,
+                    this.SpaceAfterComma, this.NoSpaceAfterComma,
+                    this.SpaceAfterAnonymousFunctionKeyword, this.NoSpaceAfterAnonymousFunctionKeyword,
+                    this.SpaceAfterKeywordInControl, this.NoSpaceAfterKeywordInControl,
+                    this.SpaceAfterOpenParen, this.SpaceBeforeCloseParen, this.NoSpaceBetweenParens, this.NoSpaceAfterOpenParen, this.NoSpaceBeforeCloseParen,
+                    this.SpaceAfterOpenBracket, this.SpaceBeforeCloseBracket, this.NoSpaceBetweenBrackets, this.NoSpaceAfterOpenBracket, this.NoSpaceBeforeCloseBracket,
+                    this.SpaceAfterOpenBrace, this.SpaceBeforeCloseBrace, this.NoSpaceBetweenEmptyBraceBrackets, this.NoSpaceAfterOpenBrace, this.NoSpaceBeforeCloseBrace,
+                    this.SpaceAfterTemplateHeadAndMiddle, this.SpaceBeforeTemplateMiddleAndTail, this.NoSpaceAfterTemplateHeadAndMiddle, this.NoSpaceBeforeTemplateMiddleAndTail,
+                    this.SpaceAfterOpenBraceInJsxExpression, this.SpaceBeforeCloseBraceInJsxExpression, this.NoSpaceAfterOpenBraceInJsxExpression, this.NoSpaceBeforeCloseBraceInJsxExpression,
+                    this.SpaceAfterSemicolonInFor, this.NoSpaceAfterSemicolonInFor,
+                    this.SpaceBeforeBinaryOperator, this.SpaceAfterBinaryOperator, this.NoSpaceBeforeBinaryOperator, this.NoSpaceAfterBinaryOperator,
+                    this.SpaceBeforeOpenParenInFuncDecl, this.NoSpaceBeforeOpenParenInFuncDecl,
+                    this.NewLineBeforeOpenBraceInControl,
+                    this.NewLineBeforeOpenBraceInFunction, this.NewLineBeforeOpenBraceInTypeScriptDeclWithBlock,
+                    this.SpaceAfterTypeAssertion, this.NoSpaceAfterTypeAssertion
+                ];
+                // These rules are lower in priority than user-configurable rules.
+                this.LowPriorityCommonRules = [
+                    this.NoSpaceBeforeSemicolon,
+                    this.SpaceBeforeOpenBraceInControl, this.SpaceBeforeOpenBraceInFunction, this.SpaceBeforeOpenBraceInTypeScriptDeclWithBlock,
+                    this.NoSpaceBeforeComma,
+                    this.NoSpaceBeforeOpenBracket,
+                    this.NoSpaceAfterCloseBracket,
+                    this.SpaceAfterSemicolon,
+                    this.SpaceBetweenStatements, this.SpaceAfterTryFinally
+                ];
+            }
+            Rules.prototype.getRuleName = function (rule) {
+                var o = this;
+                for (var name_69 in o) {
+                    if (o[name_69] === rule) {
+                        return name_69;
+                    }
+                }
+                throw new Error("Unknown rule");
+            };
+            ///
+            /// Contexts
+            ///
+            Rules.IsOptionEnabled = function (optionName) {
+                return function (context) { return context.options && context.options.hasOwnProperty(optionName) && !!context.options[optionName]; };
+            };
+            Rules.IsOptionDisabled = function (optionName) {
+                return function (context) { return context.options && context.options.hasOwnProperty(optionName) && !context.options[optionName]; };
+            };
+            Rules.IsOptionDisabledOrUndefined = function (optionName) {
+                return function (context) { return !context.options || !context.options.hasOwnProperty(optionName) || !context.options[optionName]; };
+            };
+            Rules.IsOptionEnabledOrUndefined = function (optionName) {
+                return function (context) { return !context.options || !context.options.hasOwnProperty(optionName) || !!context.options[optionName]; };
+            };
+            Rules.IsForContext = function (context) {
+                return context.contextNode.kind === 214 /* ForStatement */;
+            };
+            Rules.IsNotForContext = function (context) {
+                return !Rules.IsForContext(context);
+            };
+            Rules.IsBinaryOpContext = function (context) {
+                switch (context.contextNode.kind) {
+                    case 194 /* BinaryExpression */:
+                    case 195 /* ConditionalExpression */:
+                    case 202 /* AsExpression */:
+                    case 246 /* ExportSpecifier */:
+                    case 242 /* ImportSpecifier */:
+                    case 158 /* TypePredicate */:
+                    case 166 /* UnionType */:
+                    case 167 /* IntersectionType */:
+                        return true;
+                    // equals in binding elements: function foo([[x, y] = [1, 2]])
+                    case 176 /* BindingElement */:
+                    // equals in type X = ...
+                    case 231 /* TypeAliasDeclaration */:
+                    // equal in import a = module('a');
+                    case 237 /* ImportEqualsDeclaration */:
+                    // equal in let a = 0;
+                    case 226 /* VariableDeclaration */:
+                    // equal in p = 0;
+                    case 146 /* Parameter */:
+                    case 264 /* EnumMember */:
+                    case 149 /* PropertyDeclaration */:
+                    case 148 /* PropertySignature */:
+                        return context.currentTokenSpan.kind === 58 /* EqualsToken */ || context.nextTokenSpan.kind === 58 /* EqualsToken */;
+                    // "in" keyword in for (let x in []) { }
+                    case 215 /* ForInStatement */:
+                    // "in" keyword in [P in keyof T]: T[P]
+                    case 145 /* TypeParameter */:
+                        return context.currentTokenSpan.kind === 92 /* InKeyword */ || context.nextTokenSpan.kind === 92 /* InKeyword */;
+                    // Technically, "of" is not a binary operator, but format it the same way as "in"
+                    case 216 /* ForOfStatement */:
+                        return context.currentTokenSpan.kind === 142 /* OfKeyword */ || context.nextTokenSpan.kind === 142 /* OfKeyword */;
+                }
+                return false;
+            };
+            Rules.IsNotBinaryOpContext = function (context) {
+                return !Rules.IsBinaryOpContext(context);
+            };
+            Rules.IsConditionalOperatorContext = function (context) {
+                return context.contextNode.kind === 195 /* ConditionalExpression */;
+            };
+            Rules.IsSameLineTokenOrBeforeMultilineBlockContext = function (context) {
+                //// This check is mainly used inside SpaceBeforeOpenBraceInControl and SpaceBeforeOpenBraceInFunction.
+                ////
+                //// Ex:
+                //// if (1)     { ....
+                ////      * ) and { are on the same line so apply the rule. Here we don't care whether it's same or multi block context
+                ////
+                //// Ex:
+                //// if (1)
+                //// { ... }
+                ////      * ) and { are on different lines. We only need to format if the block is multiline context. So in this case we don't format.
+                ////
+                //// Ex:
+                //// if (1)
+                //// { ...
+                //// }
+                ////      * ) and { are on different lines. We only need to format if the block is multiline context. So in this case we format.
+                return context.TokensAreOnSameLine() || Rules.IsBeforeMultilineBlockContext(context);
+            };
+            Rules.IsBraceWrappedContext = function (context) {
+                return context.contextNode.kind === 174 /* ObjectBindingPattern */ || Rules.IsSingleLineBlockContext(context);
+            };
+            // This check is done before an open brace in a control construct, a function, or a typescript block declaration
+            Rules.IsBeforeMultilineBlockContext = function (context) {
+                return Rules.IsBeforeBlockContext(context) && !(context.NextNodeAllOnSameLine() || context.NextNodeBlockIsOnOneLine());
+            };
+            Rules.IsMultilineBlockContext = function (context) {
+                return Rules.IsBlockContext(context) && !(context.ContextNodeAllOnSameLine() || context.ContextNodeBlockIsOnOneLine());
+            };
+            Rules.IsSingleLineBlockContext = function (context) {
+                return Rules.IsBlockContext(context) && (context.ContextNodeAllOnSameLine() || context.ContextNodeBlockIsOnOneLine());
+            };
+            Rules.IsBlockContext = function (context) {
+                return Rules.NodeIsBlockContext(context.contextNode);
+            };
+            Rules.IsBeforeBlockContext = function (context) {
+                return Rules.NodeIsBlockContext(context.nextTokenParent);
+            };
+            // IMPORTANT!!! This method must return true ONLY for nodes with open and close braces as immediate children
+            Rules.NodeIsBlockContext = function (node) {
+                if (Rules.NodeIsTypeScriptDeclWithBlockContext(node)) {
+                    // This means we are in a context that looks like a block to the user, but in the grammar is actually not a node (it's a class, module, enum, object type literal, etc).
+                    return true;
+                }
+                switch (node.kind) {
+                    case 207 /* Block */:
+                    case 235 /* CaseBlock */:
+                    case 178 /* ObjectLiteralExpression */:
+                    case 234 /* ModuleBlock */:
+                        return true;
+                }
+                return false;
+            };
+            Rules.IsFunctionDeclContext = function (context) {
+                switch (context.contextNode.kind) {
+                    case 228 /* FunctionDeclaration */:
+                    case 151 /* MethodDeclaration */:
+                    case 150 /* MethodSignature */:
+                    // case SyntaxKind.MemberFunctionDeclaration:
+                    case 153 /* GetAccessor */:
+                    case 154 /* SetAccessor */:
+                    // case SyntaxKind.MethodSignature:
+                    case 155 /* CallSignature */:
+                    case 186 /* FunctionExpression */:
+                    case 152 /* Constructor */:
+                    case 187 /* ArrowFunction */:
+                    // case SyntaxKind.ConstructorDeclaration:
+                    // case SyntaxKind.SimpleArrowFunctionExpression:
+                    // case SyntaxKind.ParenthesizedArrowFunctionExpression:
+                    case 230 /* InterfaceDeclaration */:
+                        return true;
+                }
+                return false;
+            };
+            Rules.IsFunctionDeclarationOrFunctionExpressionContext = function (context) {
+                return context.contextNode.kind === 228 /* FunctionDeclaration */ || context.contextNode.kind === 186 /* FunctionExpression */;
+            };
+            Rules.IsTypeScriptDeclWithBlockContext = function (context) {
+                return Rules.NodeIsTypeScriptDeclWithBlockContext(context.contextNode);
+            };
+            Rules.NodeIsTypeScriptDeclWithBlockContext = function (node) {
+                switch (node.kind) {
+                    case 229 /* ClassDeclaration */:
+                    case 199 /* ClassExpression */:
+                    case 230 /* InterfaceDeclaration */:
+                    case 232 /* EnumDeclaration */:
+                    case 163 /* TypeLiteral */:
+                    case 233 /* ModuleDeclaration */:
+                    case 244 /* ExportDeclaration */:
+                    case 245 /* NamedExports */:
+                    case 238 /* ImportDeclaration */:
+                    case 241 /* NamedImports */:
+                        return true;
+                }
+                return false;
+            };
+            Rules.IsAfterCodeBlockContext = function (context) {
+                switch (context.currentTokenParent.kind) {
+                    case 229 /* ClassDeclaration */:
+                    case 233 /* ModuleDeclaration */:
+                    case 232 /* EnumDeclaration */:
+                    case 260 /* CatchClause */:
+                    case 234 /* ModuleBlock */:
+                    case 221 /* SwitchStatement */:
+                        return true;
+                    case 207 /* Block */: {
+                        var blockParent = context.currentTokenParent.parent;
+                        if (blockParent.kind !== 187 /* ArrowFunction */ &&
+                            blockParent.kind !== 186 /* FunctionExpression */) {
+                            return true;
+                        }
+                    }
+                }
+                return false;
+            };
+            Rules.IsControlDeclContext = function (context) {
+                switch (context.contextNode.kind) {
+                    case 211 /* IfStatement */:
+                    case 221 /* SwitchStatement */:
+                    case 214 /* ForStatement */:
+                    case 215 /* ForInStatement */:
+                    case 216 /* ForOfStatement */:
+                    case 213 /* WhileStatement */:
+                    case 224 /* TryStatement */:
+                    case 212 /* DoStatement */:
+                    case 220 /* WithStatement */:
+                    // TODO
+                    // case SyntaxKind.ElseClause:
+                    case 260 /* CatchClause */:
+                        return true;
+                    default:
+                        return false;
+                }
+            };
+            Rules.IsObjectContext = function (context) {
+                return context.contextNode.kind === 178 /* ObjectLiteralExpression */;
+            };
+            Rules.IsFunctionCallContext = function (context) {
+                return context.contextNode.kind === 181 /* CallExpression */;
+            };
+            Rules.IsNewContext = function (context) {
+                return context.contextNode.kind === 182 /* NewExpression */;
+            };
+            Rules.IsFunctionCallOrNewContext = function (context) {
+                return Rules.IsFunctionCallContext(context) || Rules.IsNewContext(context);
+            };
+            Rules.IsPreviousTokenNotComma = function (context) {
+                return context.currentTokenSpan.kind !== 26 /* CommaToken */;
+            };
+            Rules.IsNextTokenNotCloseBracket = function (context) {
+                return context.nextTokenSpan.kind !== 22 /* CloseBracketToken */;
+            };
+            Rules.IsArrowFunctionContext = function (context) {
+                return context.contextNode.kind === 187 /* ArrowFunction */;
+            };
+            Rules.IsNonJsxSameLineTokenContext = function (context) {
+                return context.TokensAreOnSameLine() && context.contextNode.kind !== 10 /* JsxText */;
+            };
+            Rules.IsNonJsxElementContext = function (context) {
+                return context.contextNode.kind !== 249 /* JsxElement */;
+            };
+            Rules.IsJsxExpressionContext = function (context) {
+                return context.contextNode.kind === 256 /* JsxExpression */;
+            };
+            Rules.IsNextTokenParentJsxAttribute = function (context) {
+                return context.nextTokenParent.kind === 253 /* JsxAttribute */;
+            };
+            Rules.IsJsxAttributeContext = function (context) {
+                return context.contextNode.kind === 253 /* JsxAttribute */;
+            };
+            Rules.IsJsxSelfClosingElementContext = function (context) {
+                return context.contextNode.kind === 250 /* JsxSelfClosingElement */;
+            };
+            Rules.IsNotBeforeBlockInFunctionDeclarationContext = function (context) {
+                return !Rules.IsFunctionDeclContext(context) && !Rules.IsBeforeBlockContext(context);
+            };
+            Rules.IsEndOfDecoratorContextOnSameLine = function (context) {
+                return context.TokensAreOnSameLine() &&
+                    context.contextNode.decorators &&
+                    Rules.NodeIsInDecoratorContext(context.currentTokenParent) &&
+                    !Rules.NodeIsInDecoratorContext(context.nextTokenParent);
+            };
+            Rules.NodeIsInDecoratorContext = function (node) {
+                while (ts.isPartOfExpression(node)) {
+                    node = node.parent;
+                }
+                return node.kind === 147 /* Decorator */;
+            };
+            Rules.IsStartOfVariableDeclarationList = function (context) {
+                return context.currentTokenParent.kind === 227 /* VariableDeclarationList */ &&
+                    context.currentTokenParent.getStart(context.sourceFile) === context.currentTokenSpan.pos;
+            };
+            Rules.IsNotFormatOnEnter = function (context) {
+                return context.formattingRequestKind !== 2 /* FormatOnEnter */;
+            };
+            Rules.IsModuleDeclContext = function (context) {
+                return context.contextNode.kind === 233 /* ModuleDeclaration */;
+            };
+            Rules.IsObjectTypeContext = function (context) {
+                return context.contextNode.kind === 163 /* TypeLiteral */; // && context.contextNode.parent.kind !== SyntaxKind.InterfaceDeclaration;
+            };
+            Rules.IsConstructorSignatureContext = function (context) {
+                return context.contextNode.kind === 156 /* ConstructSignature */;
+            };
+            Rules.IsTypeArgumentOrParameterOrAssertion = function (token, parent) {
+                if (token.kind !== 27 /* LessThanToken */ && token.kind !== 29 /* GreaterThanToken */) {
+                    return false;
+                }
+                switch (parent.kind) {
+                    case 159 /* TypeReference */:
+                    case 184 /* TypeAssertionExpression */:
+                    case 231 /* TypeAliasDeclaration */:
+                    case 229 /* ClassDeclaration */:
+                    case 199 /* ClassExpression */:
+                    case 230 /* InterfaceDeclaration */:
+                    case 228 /* FunctionDeclaration */:
+                    case 186 /* FunctionExpression */:
+                    case 187 /* ArrowFunction */:
+                    case 151 /* MethodDeclaration */:
+                    case 150 /* MethodSignature */:
+                    case 155 /* CallSignature */:
+                    case 156 /* ConstructSignature */:
+                    case 181 /* CallExpression */:
+                    case 182 /* NewExpression */:
+                    case 201 /* ExpressionWithTypeArguments */:
+                        return true;
+                    default:
+                        return false;
+                }
+            };
+            Rules.IsTypeArgumentOrParameterOrAssertionContext = function (context) {
+                return Rules.IsTypeArgumentOrParameterOrAssertion(context.currentTokenSpan, context.currentTokenParent) ||
+                    Rules.IsTypeArgumentOrParameterOrAssertion(context.nextTokenSpan, context.nextTokenParent);
+            };
+            Rules.IsTypeAssertionContext = function (context) {
+                return context.contextNode.kind === 184 /* TypeAssertionExpression */;
+            };
+            Rules.IsVoidOpContext = function (context) {
+                return context.currentTokenSpan.kind === 105 /* VoidKeyword */ && context.currentTokenParent.kind === 190 /* VoidExpression */;
+            };
+            Rules.IsYieldOrYieldStarWithOperand = function (context) {
+                return context.contextNode.kind === 197 /* YieldExpression */ && context.contextNode.expression !== undefined;
+            };
+            Rules.IsNonNullAssertionContext = function (context) {
+                return context.contextNode.kind === 203 /* NonNullExpression */;
+            };
+            return Rules;
         }());
-        formatting.Rule = Rule;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-///<reference path='references.ts' />
-/* @internal */
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        (function (RuleAction) {
-            RuleAction[RuleAction["Ignore"] = 1] = "Ignore";
-            RuleAction[RuleAction["Space"] = 2] = "Space";
-            RuleAction[RuleAction["NewLine"] = 4] = "NewLine";
-            RuleAction[RuleAction["Delete"] = 8] = "Delete";
-        })(formatting.RuleAction || (formatting.RuleAction = {}));
-        var RuleAction = formatting.RuleAction;
+        formatting.Rules = Rules;
     })(formatting = ts.formatting || (ts.formatting = {}));
 })(ts || (ts = {}));
 ///<reference path='references.ts' />
@@ -70906,30 +85267,152 @@ var ts;
 (function (ts) {
     var formatting;
     (function (formatting) {
-        var RuleDescriptor = (function () {
-            function RuleDescriptor(LeftTokenRange, RightTokenRange) {
-                this.LeftTokenRange = LeftTokenRange;
-                this.RightTokenRange = RightTokenRange;
+        var RulesMap = (function () {
+            function RulesMap() {
+                this.map = [];
+                this.mapRowLength = 0;
             }
-            RuleDescriptor.prototype.toString = function () {
-                return "[leftRange=" + this.LeftTokenRange + "," +
-                    "rightRange=" + this.RightTokenRange + "]";
+            RulesMap.create = function (rules) {
+                var result = new RulesMap();
+                result.Initialize(rules);
+                return result;
             };
-            RuleDescriptor.create1 = function (left, right) {
-                return RuleDescriptor.create4(formatting.Shared.TokenRange.FromToken(left), formatting.Shared.TokenRange.FromToken(right));
+            RulesMap.prototype.Initialize = function (rules) {
+                this.mapRowLength = 142 /* LastToken */ + 1;
+                this.map = new Array(this.mapRowLength * this.mapRowLength); // new Array<RulesBucket>(this.mapRowLength * this.mapRowLength);
+                // This array is used only during construction of the rulesbucket in the map
+                var rulesBucketConstructionStateList = new Array(this.map.length); // new Array<RulesBucketConstructionState>(this.map.length);
+                this.FillRules(rules, rulesBucketConstructionStateList);
+                return this.map;
             };
-            RuleDescriptor.create2 = function (left, right) {
-                return RuleDescriptor.create4(left, formatting.Shared.TokenRange.FromToken(right));
+            RulesMap.prototype.FillRules = function (rules, rulesBucketConstructionStateList) {
+                var _this = this;
+                rules.forEach(function (rule) {
+                    _this.FillRule(rule, rulesBucketConstructionStateList);
+                });
             };
-            RuleDescriptor.create3 = function (left, right) {
-                return RuleDescriptor.create4(formatting.Shared.TokenRange.FromToken(left), right);
+            RulesMap.prototype.GetRuleBucketIndex = function (row, column) {
+                ts.Debug.assert(row <= 142 /* LastKeyword */ && column <= 142 /* LastKeyword */, "Must compute formatting context from tokens");
+                var rulesBucketIndex = (row * this.mapRowLength) + column;
+                return rulesBucketIndex;
             };
-            RuleDescriptor.create4 = function (left, right) {
-                return new RuleDescriptor(left, right);
+            RulesMap.prototype.FillRule = function (rule, rulesBucketConstructionStateList) {
+                var _this = this;
+                var specificRule = rule.Descriptor.LeftTokenRange.isSpecific() && rule.Descriptor.RightTokenRange.isSpecific();
+                rule.Descriptor.LeftTokenRange.GetTokens().forEach(function (left) {
+                    rule.Descriptor.RightTokenRange.GetTokens().forEach(function (right) {
+                        var rulesBucketIndex = _this.GetRuleBucketIndex(left, right);
+                        var rulesBucket = _this.map[rulesBucketIndex];
+                        if (rulesBucket === undefined) {
+                            rulesBucket = _this.map[rulesBucketIndex] = new RulesBucket();
+                        }
+                        rulesBucket.AddRule(rule, specificRule, rulesBucketConstructionStateList, rulesBucketIndex);
+                    });
+                });
             };
-            return RuleDescriptor;
+            RulesMap.prototype.GetRule = function (context) {
+                var bucketIndex = this.GetRuleBucketIndex(context.currentTokenSpan.kind, context.nextTokenSpan.kind);
+                var bucket = this.map[bucketIndex];
+                if (bucket) {
+                    for (var _i = 0, _a = bucket.Rules(); _i < _a.length; _i++) {
+                        var rule = _a[_i];
+                        if (rule.Operation.Context.InContext(context)) {
+                            return rule;
+                        }
+                    }
+                }
+                return undefined;
+            };
+            return RulesMap;
         }());
-        formatting.RuleDescriptor = RuleDescriptor;
+        formatting.RulesMap = RulesMap;
+        var MaskBitSize = 5;
+        var Mask = 0x1f;
+        var RulesPosition;
+        (function (RulesPosition) {
+            RulesPosition[RulesPosition["IgnoreRulesSpecific"] = 0] = "IgnoreRulesSpecific";
+            RulesPosition[RulesPosition["IgnoreRulesAny"] = MaskBitSize * 1] = "IgnoreRulesAny";
+            RulesPosition[RulesPosition["ContextRulesSpecific"] = MaskBitSize * 2] = "ContextRulesSpecific";
+            RulesPosition[RulesPosition["ContextRulesAny"] = MaskBitSize * 3] = "ContextRulesAny";
+            RulesPosition[RulesPosition["NoContextRulesSpecific"] = MaskBitSize * 4] = "NoContextRulesSpecific";
+            RulesPosition[RulesPosition["NoContextRulesAny"] = MaskBitSize * 5] = "NoContextRulesAny";
+        })(RulesPosition = formatting.RulesPosition || (formatting.RulesPosition = {}));
+        var RulesBucketConstructionState = (function () {
+            function RulesBucketConstructionState() {
+                //// The Rules list contains all the inserted rules into a rulebucket in the following order:
+                ////    1- Ignore rules with specific token combination
+                ////    2- Ignore rules with any token combination
+                ////    3- Context rules with specific token combination
+                ////    4- Context rules with any token combination
+                ////    5- Non-context rules with specific token combination
+                ////    6- Non-context rules with any token combination
+                ////
+                //// The member rulesInsertionIndexBitmap is used to describe the number of rules
+                //// in each sub-bucket (above) hence can be used to know the index of where to insert
+                //// the next rule. It's a bitmap which contains 6 different sections each is given 5 bits.
+                ////
+                //// Example:
+                //// In order to insert a rule to the end of sub-bucket (3), we get the index by adding
+                //// the values in the bitmap segments 3rd, 2nd, and 1st.
+                this.rulesInsertionIndexBitmap = 0;
+            }
+            RulesBucketConstructionState.prototype.GetInsertionIndex = function (maskPosition) {
+                var index = 0;
+                var pos = 0;
+                var indexBitmap = this.rulesInsertionIndexBitmap;
+                while (pos <= maskPosition) {
+                    index += (indexBitmap & Mask);
+                    indexBitmap >>= MaskBitSize;
+                    pos += MaskBitSize;
+                }
+                return index;
+            };
+            RulesBucketConstructionState.prototype.IncreaseInsertionIndex = function (maskPosition) {
+                var value = (this.rulesInsertionIndexBitmap >> maskPosition) & Mask;
+                value++;
+                ts.Debug.assert((value & Mask) === value, "Adding more rules into the sub-bucket than allowed. Maximum allowed is 32 rules.");
+                var temp = this.rulesInsertionIndexBitmap & ~(Mask << maskPosition);
+                temp |= value << maskPosition;
+                this.rulesInsertionIndexBitmap = temp;
+            };
+            return RulesBucketConstructionState;
+        }());
+        formatting.RulesBucketConstructionState = RulesBucketConstructionState;
+        var RulesBucket = (function () {
+            function RulesBucket() {
+                this.rules = [];
+            }
+            RulesBucket.prototype.Rules = function () {
+                return this.rules;
+            };
+            RulesBucket.prototype.AddRule = function (rule, specificTokens, constructionState, rulesBucketIndex) {
+                var position;
+                if (rule.Operation.Action === 1 /* Ignore */) {
+                    position = specificTokens ?
+                        RulesPosition.IgnoreRulesSpecific :
+                        RulesPosition.IgnoreRulesAny;
+                }
+                else if (!rule.Operation.Context.IsAny()) {
+                    position = specificTokens ?
+                        RulesPosition.ContextRulesSpecific :
+                        RulesPosition.ContextRulesAny;
+                }
+                else {
+                    position = specificTokens ?
+                        RulesPosition.NoContextRulesSpecific :
+                        RulesPosition.NoContextRulesAny;
+                }
+                var state = constructionState[rulesBucketIndex];
+                if (state === undefined) {
+                    state = constructionState[rulesBucketIndex] = new RulesBucketConstructionState();
+                }
+                var index = state.GetInsertionIndex(position);
+                this.rules.splice(index, 0, rule);
+                state.IncreaseInsertionIndex(position);
+            };
+            return RulesBucket;
+        }());
+        formatting.RulesBucket = RulesBucket;
     })(formatting = ts.formatting || (ts.formatting = {}));
 })(ts || (ts = {}));
 ///<reference path='references.ts' />
@@ -70938,2392 +85421,3884 @@ var ts;
 (function (ts) {
     var formatting;
     (function (formatting) {
-        (function (RuleFlags) {
-            RuleFlags[RuleFlags["None"] = 0] = "None";
-            RuleFlags[RuleFlags["CanDeleteNewLines"] = 1] = "CanDeleteNewLines";
-        })(formatting.RuleFlags || (formatting.RuleFlags = {}));
-        var RuleFlags = formatting.RuleFlags;
+        var Shared;
+        (function (Shared) {
+            var allTokens = [];
+            for (var token = 0 /* FirstToken */; token <= 142 /* LastToken */; token++) {
+                allTokens.push(token);
+            }
+            var TokenValuesAccess = (function () {
+                function TokenValuesAccess(tokens) {
+                    if (tokens === void 0) { tokens = []; }
+                    this.tokens = tokens;
+                }
+                TokenValuesAccess.prototype.GetTokens = function () {
+                    return this.tokens;
+                };
+                TokenValuesAccess.prototype.Contains = function (token) {
+                    return this.tokens.indexOf(token) >= 0;
+                };
+                TokenValuesAccess.prototype.isSpecific = function () { return true; };
+                return TokenValuesAccess;
+            }());
+            var TokenSingleValueAccess = (function () {
+                function TokenSingleValueAccess(token) {
+                    this.token = token;
+                }
+                TokenSingleValueAccess.prototype.GetTokens = function () {
+                    return [this.token];
+                };
+                TokenSingleValueAccess.prototype.Contains = function (tokenValue) {
+                    return tokenValue === this.token;
+                };
+                TokenSingleValueAccess.prototype.isSpecific = function () { return true; };
+                return TokenSingleValueAccess;
+            }());
+            var TokenAllAccess = (function () {
+                function TokenAllAccess() {
+                }
+                TokenAllAccess.prototype.GetTokens = function () {
+                    return allTokens;
+                };
+                TokenAllAccess.prototype.Contains = function () {
+                    return true;
+                };
+                TokenAllAccess.prototype.toString = function () {
+                    return "[allTokens]";
+                };
+                TokenAllAccess.prototype.isSpecific = function () { return false; };
+                return TokenAllAccess;
+            }());
+            var TokenAllExceptAccess = (function () {
+                function TokenAllExceptAccess(except) {
+                    this.except = except;
+                }
+                TokenAllExceptAccess.prototype.GetTokens = function () {
+                    var _this = this;
+                    return allTokens.filter(function (t) { return t !== _this.except; });
+                };
+                TokenAllExceptAccess.prototype.Contains = function (token) {
+                    return token !== this.except;
+                };
+                TokenAllExceptAccess.prototype.isSpecific = function () { return false; };
+                return TokenAllExceptAccess;
+            }());
+            var TokenRange;
+            (function (TokenRange) {
+                function FromToken(token) {
+                    return new TokenSingleValueAccess(token);
+                }
+                TokenRange.FromToken = FromToken;
+                function FromTokens(tokens) {
+                    return new TokenValuesAccess(tokens);
+                }
+                TokenRange.FromTokens = FromTokens;
+                function FromRange(from, to, except) {
+                    if (except === void 0) { except = []; }
+                    var tokens = [];
+                    for (var token = from; token <= to; token++) {
+                        if (ts.indexOf(except, token) < 0) {
+                            tokens.push(token);
+                        }
+                    }
+                    return new TokenValuesAccess(tokens);
+                }
+                TokenRange.FromRange = FromRange;
+                function AnyExcept(token) {
+                    return new TokenAllExceptAccess(token);
+                }
+                TokenRange.AnyExcept = AnyExcept;
+                TokenRange.Any = new TokenAllAccess();
+                TokenRange.AnyIncludingMultilineComments = TokenRange.FromTokens(allTokens.concat([3 /* MultiLineCommentTrivia */]));
+                TokenRange.Keywords = TokenRange.FromRange(72 /* FirstKeyword */, 142 /* LastKeyword */);
+                TokenRange.BinaryOperators = TokenRange.FromRange(27 /* FirstBinaryOperator */, 70 /* LastBinaryOperator */);
+                TokenRange.BinaryKeywordOperators = TokenRange.FromTokens([
+                    92 /* InKeyword */, 93 /* InstanceOfKeyword */, 142 /* OfKeyword */, 118 /* AsKeyword */, 126 /* IsKeyword */
+                ]);
+                TokenRange.UnaryPrefixOperators = TokenRange.FromTokens([
+                    43 /* PlusPlusToken */, 44 /* MinusMinusToken */, 52 /* TildeToken */, 51 /* ExclamationToken */
+                ]);
+                TokenRange.UnaryPrefixExpressions = TokenRange.FromTokens([
+                    8 /* NumericLiteral */, 71 /* Identifier */, 19 /* OpenParenToken */, 21 /* OpenBracketToken */,
+                    17 /* OpenBraceToken */, 99 /* ThisKeyword */, 94 /* NewKeyword */
+                ]);
+                TokenRange.UnaryPreincrementExpressions = TokenRange.FromTokens([
+                    71 /* Identifier */, 19 /* OpenParenToken */, 99 /* ThisKeyword */, 94 /* NewKeyword */
+                ]);
+                TokenRange.UnaryPostincrementExpressions = TokenRange.FromTokens([
+                    71 /* Identifier */, 20 /* CloseParenToken */, 22 /* CloseBracketToken */, 94 /* NewKeyword */
+                ]);
+                TokenRange.UnaryPredecrementExpressions = TokenRange.FromTokens([
+                    71 /* Identifier */, 19 /* OpenParenToken */, 99 /* ThisKeyword */, 94 /* NewKeyword */
+                ]);
+                TokenRange.UnaryPostdecrementExpressions = TokenRange.FromTokens([
+                    71 /* Identifier */, 20 /* CloseParenToken */, 22 /* CloseBracketToken */, 94 /* NewKeyword */
+                ]);
+                TokenRange.Comments = TokenRange.FromTokens([2 /* SingleLineCommentTrivia */, 3 /* MultiLineCommentTrivia */]);
+                TokenRange.TypeNames = TokenRange.FromTokens([
+                    71 /* Identifier */, 133 /* NumberKeyword */, 136 /* StringKeyword */, 122 /* BooleanKeyword */,
+                    137 /* SymbolKeyword */, 105 /* VoidKeyword */, 119 /* AnyKeyword */
+                ]);
+            })(TokenRange = Shared.TokenRange || (Shared.TokenRange = {}));
+        })(Shared = formatting.Shared || (formatting.Shared = {}));
     })(formatting = ts.formatting || (ts.formatting = {}));
 })(ts || (ts = {}));
-///<reference path='references.ts' />
+///<reference path='..\services.ts' />
+///<reference path='formattingContext.ts' />
+///<reference path='formattingRequestKind.ts' />
+///<reference path='rule.ts' />
+///<reference path='ruleAction.ts' />
+///<reference path='ruleDescriptor.ts' />
+///<reference path='ruleFlag.ts' />
+///<reference path='ruleOperation.ts' />
+///<reference path='ruleOperationContext.ts' />
+///<reference path='rules.ts' />
+///<reference path='rulesMap.ts' />
+///<reference path='tokenRange.ts' /> 
+/// <reference path="references.ts"/>
 /* @internal */
 var ts;
 (function (ts) {
     var formatting;
     (function (formatting) {
-        var RuleOperation = (function () {
-            function RuleOperation(Context, Action) {
-                this.Context = Context;
-                this.Action = Action;
+        var RulesProvider = (function () {
+            function RulesProvider() {
+                this.globalRules = new formatting.Rules();
+                var activeRules = this.globalRules.HighPriorityCommonRules.slice(0).concat(this.globalRules.UserConfigurableRules).concat(this.globalRules.LowPriorityCommonRules);
+                this.rulesMap = formatting.RulesMap.create(activeRules);
             }
-            RuleOperation.prototype.toString = function () {
-                return "[context=" + this.Context + "," +
-                    "action=" + this.Action + "]";
+            RulesProvider.prototype.getRuleName = function (rule) {
+                return this.globalRules.getRuleName(rule);
             };
-            RuleOperation.create1 = function (action) {
-                return RuleOperation.create2(formatting.RuleOperationContext.Any, action);
+            RulesProvider.prototype.getRuleByName = function (name) {
+                return this.globalRules[name];
             };
-            RuleOperation.create2 = function (context, action) {
-                return new RuleOperation(context, action);
+            RulesProvider.prototype.getRulesMap = function () {
+                return this.rulesMap;
             };
-            return RuleOperation;
+            RulesProvider.prototype.getFormatOptions = function () {
+                return this.options;
+            };
+            RulesProvider.prototype.ensureUpToDate = function (options) {
+                if (!this.options || !ts.compareDataObjects(this.options, options)) {
+                    this.options = ts.clone(options);
+                }
+            };
+            return RulesProvider;
         }());
-        formatting.RuleOperation = RuleOperation;
+        formatting.RulesProvider = RulesProvider;
     })(formatting = ts.formatting || (ts.formatting = {}));
 })(ts || (ts = {}));
+///<reference path='..\services.ts' />
+///<reference path='formattingScanner.ts' />
+///<reference path='rulesProvider.ts' />
 ///<reference path='references.ts' />
 /* @internal */
 var ts;
 (function (ts) {
     var formatting;
     (function (formatting) {
-        var RuleOperationContext = (function () {
-            function RuleOperationContext() {
-                var funcs = [];
-                for (var _i = 0; _i < arguments.length; _i++) {
-                    funcs[_i - 0] = arguments[_i];
+        var Constants;
+        (function (Constants) {
+            Constants[Constants["Unknown"] = -1] = "Unknown";
+        })(Constants || (Constants = {}));
+        function formatOnEnter(position, sourceFile, rulesProvider, options) {
+            var line = sourceFile.getLineAndCharacterOfPosition(position).line;
+            if (line === 0) {
+                return [];
+            }
+            // After the enter key, the cursor is now at a new line. The new line may or may not contain non-whitespace characters.
+            // If the new line has only whitespaces, we won't want to format this line, because that would remove the indentation as
+            // trailing whitespaces. So the end of the formatting span should be the later one between:
+            //  1. the end of the previous line
+            //  2. the last non-whitespace character in the current line
+            var endOfFormatSpan = ts.getEndLinePosition(line, sourceFile);
+            while (ts.isWhiteSpaceSingleLine(sourceFile.text.charCodeAt(endOfFormatSpan))) {
+                endOfFormatSpan--;
+            }
+            // if the character at the end of the span is a line break, we shouldn't include it, because it indicates we don't want to
+            // touch the current line at all. Also, on some OSes the line break consists of two characters (\r\n), we should test if the
+            // previous character before the end of format span is line break character as well.
+            if (ts.isLineBreak(sourceFile.text.charCodeAt(endOfFormatSpan))) {
+                endOfFormatSpan--;
+            }
+            var span = {
+                // get start position for the previous line
+                pos: ts.getStartPositionOfLine(line - 1, sourceFile),
+                // end value is exclusive so add 1 to the result
+                end: endOfFormatSpan + 1
+            };
+            return formatSpan(span, sourceFile, options, rulesProvider, 2 /* FormatOnEnter */);
+        }
+        formatting.formatOnEnter = formatOnEnter;
+        function formatOnSemicolon(position, sourceFile, rulesProvider, options) {
+            return formatOutermostParent(position, 25 /* SemicolonToken */, sourceFile, options, rulesProvider, 3 /* FormatOnSemicolon */);
+        }
+        formatting.formatOnSemicolon = formatOnSemicolon;
+        function formatOnClosingCurly(position, sourceFile, rulesProvider, options) {
+            return formatOutermostParent(position, 18 /* CloseBraceToken */, sourceFile, options, rulesProvider, 4 /* FormatOnClosingCurlyBrace */);
+        }
+        formatting.formatOnClosingCurly = formatOnClosingCurly;
+        function formatDocument(sourceFile, rulesProvider, options) {
+            var span = {
+                pos: 0,
+                end: sourceFile.text.length
+            };
+            return formatSpan(span, sourceFile, options, rulesProvider, 0 /* FormatDocument */);
+        }
+        formatting.formatDocument = formatDocument;
+        function formatSelection(start, end, sourceFile, rulesProvider, options) {
+            // format from the beginning of the line
+            var span = {
+                pos: ts.getLineStartPositionForPosition(start, sourceFile),
+                end: end
+            };
+            return formatSpan(span, sourceFile, options, rulesProvider, 1 /* FormatSelection */);
+        }
+        formatting.formatSelection = formatSelection;
+        function formatOutermostParent(position, expectedLastToken, sourceFile, options, rulesProvider, requestKind) {
+            var parent = findOutermostParent(position, expectedLastToken, sourceFile);
+            if (!parent) {
+                return [];
+            }
+            var span = {
+                pos: ts.getLineStartPositionForPosition(parent.getStart(sourceFile), sourceFile),
+                end: parent.end
+            };
+            return formatSpan(span, sourceFile, options, rulesProvider, requestKind);
+        }
+        function findOutermostParent(position, expectedTokenKind, sourceFile) {
+            var precedingToken = ts.findPrecedingToken(position, sourceFile);
+            // when it is claimed that trigger character was typed at given position
+            // we verify that there is a token with a matching kind whose end is equal to position (because the character was just typed).
+            // If this condition is not hold - then trigger character was typed in some other context,
+            // i.e.in comment and thus should not trigger autoformatting
+            if (!precedingToken ||
+                precedingToken.kind !== expectedTokenKind ||
+                position !== precedingToken.getEnd()) {
+                return undefined;
+            }
+            // walk up and search for the parent node that ends at the same position with precedingToken.
+            // for cases like this
+            //
+            // let x = 1;
+            // while (true) {
+            // }
+            // after typing close curly in while statement we want to reformat just the while statement.
+            // However if we just walk upwards searching for the parent that has the same end value -
+            // we'll end up with the whole source file. isListElement allows to stop on the list element level
+            var current = precedingToken;
+            while (current &&
+                current.parent &&
+                current.parent.end === precedingToken.end &&
+                !isListElement(current.parent, current)) {
+                current = current.parent;
+            }
+            return current;
+        }
+        // Returns true if node is a element in some list in parent
+        // i.e. parent is class declaration with the list of members and node is one of members.
+        function isListElement(parent, node) {
+            switch (parent.kind) {
+                case 229 /* ClassDeclaration */:
+                case 230 /* InterfaceDeclaration */:
+                    return ts.rangeContainsRange(parent.members, node);
+                case 233 /* ModuleDeclaration */:
+                    var body = parent.body;
+                    return body && body.kind === 234 /* ModuleBlock */ && ts.rangeContainsRange(body.statements, node);
+                case 265 /* SourceFile */:
+                case 207 /* Block */:
+                case 234 /* ModuleBlock */:
+                    return ts.rangeContainsRange(parent.statements, node);
+                case 260 /* CatchClause */:
+                    return ts.rangeContainsRange(parent.block.statements, node);
+            }
+            return false;
+        }
+        /** find node that fully contains given text range */
+        function findEnclosingNode(range, sourceFile) {
+            return find(sourceFile);
+            function find(n) {
+                var candidate = ts.forEachChild(n, function (c) { return ts.startEndContainsRange(c.getStart(sourceFile), c.end, range) && c; });
+                if (candidate) {
+                    var result = find(candidate);
+                    if (result) {
+                        return result;
+                    }
+                }
+                return n;
+            }
+        }
+        /** formatting is not applied to ranges that contain parse errors.
+         * This function will return a predicate that for a given text range will tell
+         * if there are any parse errors that overlap with the range.
+         */
+        function prepareRangeContainsErrorFunction(errors, originalRange) {
+            if (!errors.length) {
+                return rangeHasNoErrors;
+            }
+            // pick only errors that fall in range
+            var sorted = errors
+                .filter(function (d) { return ts.rangeOverlapsWithStartEnd(originalRange, d.start, d.start + d.length); })
+                .sort(function (e1, e2) { return e1.start - e2.start; });
+            if (!sorted.length) {
+                return rangeHasNoErrors;
+            }
+            var index = 0;
+            return function (r) {
+                // in current implementation sequence of arguments [r1, r2...] is monotonically increasing.
+                // 'index' tracks the index of the most recent error that was checked.
+                while (true) {
+                    if (index >= sorted.length) {
+                        // all errors in the range were already checked -> no error in specified range
+                        return false;
+                    }
+                    var error = sorted[index];
+                    if (r.end <= error.start) {
+                        // specified range ends before the error refered by 'index' - no error in range
+                        return false;
+                    }
+                    if (ts.startEndOverlapsWithStartEnd(r.pos, r.end, error.start, error.start + error.length)) {
+                        // specified range overlaps with error range
+                        return true;
+                    }
+                    index++;
+                }
+            };
+            function rangeHasNoErrors() {
+                return false;
+            }
+        }
+        /**
+         * Start of the original range might fall inside the comment - scanner will not yield appropriate results
+         * This function will look for token that is located before the start of target range
+         * and return its end as start position for the scanner.
+         */
+        function getScanStartPosition(enclosingNode, originalRange, sourceFile) {
+            var start = enclosingNode.getStart(sourceFile);
+            if (start === originalRange.pos && enclosingNode.end === originalRange.end) {
+                return start;
+            }
+            var precedingToken = ts.findPrecedingToken(originalRange.pos, sourceFile);
+            if (!precedingToken) {
+                // no preceding token found - start from the beginning of enclosing node
+                return enclosingNode.pos;
+            }
+            // preceding token ends after the start of original range (i.e when originalRange.pos falls in the middle of literal)
+            // start from the beginning of enclosingNode to handle the entire 'originalRange'
+            if (precedingToken.end >= originalRange.pos) {
+                return enclosingNode.pos;
+            }
+            return precedingToken.end;
+        }
+        /*
+         * For cases like
+         * if (a ||
+         *     b ||$
+         *     c) {...}
+         * If we hit Enter at $ we want line '    b ||' to be indented.
+         * Formatting will be applied to the last two lines.
+         * Node that fully encloses these lines is binary expression 'a ||...'.
+         * Initial indentation for this node will be 0.
+         * Binary expressions don't introduce new indentation scopes, however it is possible
+         * that some parent node on the same line does - like if statement in this case.
+         * Note that we are considering parents only from the same line with initial node -
+         * if parent is on the different line - its delta was already contributed
+         * to the initial indentation.
+         */
+        function getOwnOrInheritedDelta(n, options, sourceFile) {
+            var previousLine = -1 /* Unknown */;
+            var child;
+            while (n) {
+                var line = sourceFile.getLineAndCharacterOfPosition(n.getStart(sourceFile)).line;
+                if (previousLine !== -1 /* Unknown */ && line !== previousLine) {
+                    break;
+                }
+                if (formatting.SmartIndenter.shouldIndentChildNode(n, child)) {
+                    return options.indentSize;
+                }
+                previousLine = line;
+                child = n;
+                n = n.parent;
+            }
+            return 0;
+        }
+        /* @internal */
+        function formatNode(node, sourceFileLike, languageVariant, initialIndentation, delta, rulesProvider) {
+            var range = { pos: 0, end: sourceFileLike.text.length };
+            return formatSpanWorker(range, node, initialIndentation, delta, formatting.getFormattingScanner(sourceFileLike.text, languageVariant, range.pos, range.end), rulesProvider.getFormatOptions(), rulesProvider, 1 /* FormatSelection */, function (_) { return false; }, // assume that node does not have any errors
+            sourceFileLike);
+        }
+        formatting.formatNode = formatNode;
+        function formatSpan(originalRange, sourceFile, options, rulesProvider, requestKind) {
+            // find the smallest node that fully wraps the range and compute the initial indentation for the node
+            var enclosingNode = findEnclosingNode(originalRange, sourceFile);
+            return formatSpanWorker(originalRange, enclosingNode, formatting.SmartIndenter.getIndentationForNode(enclosingNode, originalRange, sourceFile, options), getOwnOrInheritedDelta(enclosingNode, options, sourceFile), formatting.getFormattingScanner(sourceFile.text, sourceFile.languageVariant, getScanStartPosition(enclosingNode, originalRange, sourceFile), originalRange.end), options, rulesProvider, requestKind, prepareRangeContainsErrorFunction(sourceFile.parseDiagnostics, originalRange), sourceFile);
+        }
+        function formatSpanWorker(originalRange, enclosingNode, initialIndentation, delta, formattingScanner, options, rulesProvider, requestKind, rangeContainsError, sourceFile) {
+            // formatting context is used by rules provider
+            var formattingContext = new formatting.FormattingContext(sourceFile, requestKind, options);
+            var previousRangeHasError;
+            var previousRange;
+            var previousParent;
+            var previousRangeStartLine;
+            var lastIndentedLine;
+            var indentationOnLastIndentedLine;
+            var edits = [];
+            formattingScanner.advance();
+            if (formattingScanner.isOnToken()) {
+                var startLine = sourceFile.getLineAndCharacterOfPosition(enclosingNode.getStart(sourceFile)).line;
+                var undecoratedStartLine = startLine;
+                if (enclosingNode.decorators) {
+                    undecoratedStartLine = sourceFile.getLineAndCharacterOfPosition(ts.getNonDecoratorTokenPosOfNode(enclosingNode, sourceFile)).line;
                 }
-                this.customContextChecks = funcs;
+                processNode(enclosingNode, enclosingNode, startLine, undecoratedStartLine, initialIndentation, delta);
             }
-            RuleOperationContext.prototype.IsAny = function () {
-                return this === RuleOperationContext.Any;
-            };
-            RuleOperationContext.prototype.InContext = function (context) {
-                if (this.IsAny()) {
-                    return true;
-                }
-                for (var _i = 0, _a = this.customContextChecks; _i < _a.length; _i++) {
-                    var check = _a[_i];
-                    if (!check(context)) {
-                        return false;
-                    }
+            if (!formattingScanner.isOnToken()) {
+                var leadingTrivia = formattingScanner.getCurrentLeadingTrivia();
+                if (leadingTrivia) {
+                    processTrivia(leadingTrivia, enclosingNode, enclosingNode, /*dynamicIndentation*/ undefined);
+                    trimTrailingWhitespacesForRemainingRange();
                 }
-                return true;
-            };
-            return RuleOperationContext;
-        }());
-        RuleOperationContext.Any = new RuleOperationContext();
-        formatting.RuleOperationContext = RuleOperationContext;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-///<reference path='references.ts' />
-/* @internal */
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var Rules = (function () {
-            function Rules() {
-                ///
-                /// Common Rules
-                ///
-                // Leave comments alone
-                this.IgnoreBeforeComment = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.Comments), formatting.RuleOperation.create1(1 /* Ignore */));
-                this.IgnoreAfterLineComment = new formatting.Rule(formatting.RuleDescriptor.create3(2 /* SingleLineCommentTrivia */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create1(1 /* Ignore */));
-                // Space after keyword but not before ; or : or ?
-                this.NoSpaceBeforeSemicolon = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 23 /* SemicolonToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.NoSpaceBeforeColon = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 54 /* ColonToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 8 /* Delete */));
-                this.NoSpaceBeforeQuestionMark = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 53 /* QuestionToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 8 /* Delete */));
-                this.SpaceAfterColon = new formatting.Rule(formatting.RuleDescriptor.create3(54 /* ColonToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 2 /* Space */));
-                this.SpaceAfterQuestionMarkInConditionalOperator = new formatting.Rule(formatting.RuleDescriptor.create3(53 /* QuestionToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsConditionalOperatorContext), 2 /* Space */));
-                this.NoSpaceAfterQuestionMark = new formatting.Rule(formatting.RuleDescriptor.create3(53 /* QuestionToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.SpaceAfterSemicolon = new formatting.Rule(formatting.RuleDescriptor.create3(23 /* SemicolonToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                // Space after }.
-                this.SpaceAfterCloseBrace = new formatting.Rule(formatting.RuleDescriptor.create3(16 /* CloseBraceToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsAfterCodeBlockContext), 2 /* Space */));
-                // Special case for (}, else) and (}, while) since else & while tokens are not part of the tree which makes SpaceAfterCloseBrace rule not applied
-                this.SpaceBetweenCloseBraceAndElse = new formatting.Rule(formatting.RuleDescriptor.create1(16 /* CloseBraceToken */, 80 /* ElseKeyword */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.SpaceBetweenCloseBraceAndWhile = new formatting.Rule(formatting.RuleDescriptor.create1(16 /* CloseBraceToken */, 104 /* WhileKeyword */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.NoSpaceAfterCloseBrace = new formatting.Rule(formatting.RuleDescriptor.create3(16 /* CloseBraceToken */, formatting.Shared.TokenRange.FromTokens([18 /* CloseParenToken */, 20 /* CloseBracketToken */, 24 /* CommaToken */, 23 /* SemicolonToken */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                // No space for dot
-                this.NoSpaceBeforeDot = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 21 /* DotToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.NoSpaceAfterDot = new formatting.Rule(formatting.RuleDescriptor.create3(21 /* DotToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                // No space before and after indexer
-                this.NoSpaceBeforeOpenBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 19 /* OpenBracketToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.NoSpaceAfterCloseBracket = new formatting.Rule(formatting.RuleDescriptor.create3(20 /* CloseBracketToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBeforeBlockInFunctionDeclarationContext), 8 /* Delete */));
-                // Place a space before open brace in a function declaration
-                this.FunctionOpenBraceLeftTokenRange = formatting.Shared.TokenRange.AnyIncludingMultilineComments;
-                this.SpaceBeforeOpenBraceInFunction = new formatting.Rule(formatting.RuleDescriptor.create2(this.FunctionOpenBraceLeftTokenRange, 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext, Rules.IsBeforeBlockContext, Rules.IsNotFormatOnEnter, Rules.IsSameLineTokenOrBeforeMultilineBlockContext), 2 /* Space */), 1 /* CanDeleteNewLines */);
-                // Place a space before open brace in a TypeScript declaration that has braces as children (class, module, enum, etc)
-                this.TypeScriptOpenBraceLeftTokenRange = formatting.Shared.TokenRange.FromTokens([69 /* Identifier */, 3 /* MultiLineCommentTrivia */, 73 /* ClassKeyword */, 82 /* ExportKeyword */, 89 /* ImportKeyword */]);
-                this.SpaceBeforeOpenBraceInTypeScriptDeclWithBlock = new formatting.Rule(formatting.RuleDescriptor.create2(this.TypeScriptOpenBraceLeftTokenRange, 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsTypeScriptDeclWithBlockContext, Rules.IsNotFormatOnEnter, Rules.IsSameLineTokenOrBeforeMultilineBlockContext), 2 /* Space */), 1 /* CanDeleteNewLines */);
-                // Place a space before open brace in a control flow construct
-                this.ControlOpenBraceLeftTokenRange = formatting.Shared.TokenRange.FromTokens([18 /* CloseParenToken */, 3 /* MultiLineCommentTrivia */, 79 /* DoKeyword */, 100 /* TryKeyword */, 85 /* FinallyKeyword */, 80 /* ElseKeyword */]);
-                this.SpaceBeforeOpenBraceInControl = new formatting.Rule(formatting.RuleDescriptor.create2(this.ControlOpenBraceLeftTokenRange, 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsControlDeclContext, Rules.IsNotFormatOnEnter, Rules.IsSameLineTokenOrBeforeMultilineBlockContext), 2 /* Space */), 1 /* CanDeleteNewLines */);
-                // Insert a space after { and before } in single-line contexts, but remove space from empty object literals {}.
-                this.SpaceAfterOpenBrace = new formatting.Rule(formatting.RuleDescriptor.create3(15 /* OpenBraceToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsSingleLineBlockContext), 2 /* Space */));
-                this.SpaceBeforeCloseBrace = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 16 /* CloseBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsSingleLineBlockContext), 2 /* Space */));
-                this.NoSpaceAfterOpenBrace = new formatting.Rule(formatting.RuleDescriptor.create3(15 /* OpenBraceToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsSingleLineBlockContext), 8 /* Delete */));
-                this.NoSpaceBeforeCloseBrace = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 16 /* CloseBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsSingleLineBlockContext), 8 /* Delete */));
-                this.NoSpaceBetweenEmptyBraceBrackets = new formatting.Rule(formatting.RuleDescriptor.create1(15 /* OpenBraceToken */, 16 /* CloseBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsObjectContext), 8 /* Delete */));
-                // Insert new line after { and before } in multi-line contexts.
-                this.NewLineAfterOpenBraceInBlockContext = new formatting.Rule(formatting.RuleDescriptor.create3(15 /* OpenBraceToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsMultilineBlockContext), 4 /* NewLine */));
-                // For functions and control block place } on a new line    [multi-line rule]
-                this.NewLineBeforeCloseBraceInBlockContext = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.AnyIncludingMultilineComments, 16 /* CloseBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsMultilineBlockContext), 4 /* NewLine */));
-                // Special handling of unary operators.
-                // Prefix operators generally shouldn't have a space between
-                // them and their target unary expression.
-                this.NoSpaceAfterUnaryPrefixOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.UnaryPrefixOperators, formatting.Shared.TokenRange.UnaryPrefixExpressions), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 8 /* Delete */));
-                this.NoSpaceAfterUnaryPreincrementOperator = new formatting.Rule(formatting.RuleDescriptor.create3(41 /* PlusPlusToken */, formatting.Shared.TokenRange.UnaryPreincrementExpressions), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.NoSpaceAfterUnaryPredecrementOperator = new formatting.Rule(formatting.RuleDescriptor.create3(42 /* MinusMinusToken */, formatting.Shared.TokenRange.UnaryPredecrementExpressions), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.NoSpaceBeforeUnaryPostincrementOperator = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.UnaryPostincrementExpressions, 41 /* PlusPlusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.NoSpaceBeforeUnaryPostdecrementOperator = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.UnaryPostdecrementExpressions, 42 /* MinusMinusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                // More unary operator special-casing.
-                // DevDiv 181814:  Be careful when removing leading whitespace
-                // around unary operators.  Examples:
-                //      1 - -2  --X-->  1--2
-                //      a + ++b --X-->  a+++b
-                this.SpaceAfterPostincrementWhenFollowedByAdd = new formatting.Rule(formatting.RuleDescriptor.create1(41 /* PlusPlusToken */, 35 /* PlusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
-                this.SpaceAfterAddWhenFollowedByUnaryPlus = new formatting.Rule(formatting.RuleDescriptor.create1(35 /* PlusToken */, 35 /* PlusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
-                this.SpaceAfterAddWhenFollowedByPreincrement = new formatting.Rule(formatting.RuleDescriptor.create1(35 /* PlusToken */, 41 /* PlusPlusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
-                this.SpaceAfterPostdecrementWhenFollowedBySubtract = new formatting.Rule(formatting.RuleDescriptor.create1(42 /* MinusMinusToken */, 36 /* MinusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
-                this.SpaceAfterSubtractWhenFollowedByUnaryMinus = new formatting.Rule(formatting.RuleDescriptor.create1(36 /* MinusToken */, 36 /* MinusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
-                this.SpaceAfterSubtractWhenFollowedByPredecrement = new formatting.Rule(formatting.RuleDescriptor.create1(36 /* MinusToken */, 42 /* MinusMinusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
-                this.NoSpaceBeforeComma = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 24 /* CommaToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.SpaceAfterCertainKeywords = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([102 /* VarKeyword */, 98 /* ThrowKeyword */, 92 /* NewKeyword */, 78 /* DeleteKeyword */, 94 /* ReturnKeyword */, 101 /* TypeOfKeyword */, 119 /* AwaitKeyword */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.SpaceAfterLetConstInVariableDeclaration = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([108 /* LetKeyword */, 74 /* ConstKeyword */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsStartOfVariableDeclarationList), 2 /* Space */));
-                this.NoSpaceBeforeOpenParenInFuncCall = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsFunctionCallOrNewContext, Rules.IsPreviousTokenNotComma), 8 /* Delete */));
-                this.SpaceAfterFunctionInFuncDecl = new formatting.Rule(formatting.RuleDescriptor.create3(87 /* FunctionKeyword */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext), 2 /* Space */));
-                this.NoSpaceBeforeOpenParenInFuncDecl = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsFunctionDeclContext), 8 /* Delete */));
-                this.SpaceAfterVoidOperator = new formatting.Rule(formatting.RuleDescriptor.create3(103 /* VoidKeyword */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsVoidOpContext), 2 /* Space */));
-                this.NoSpaceBetweenReturnAndSemicolon = new formatting.Rule(formatting.RuleDescriptor.create1(94 /* ReturnKeyword */, 23 /* SemicolonToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                // Add a space between statements. All keywords except (do,else,case) has open/close parens after them.
-                // So, we have a rule to add a space for [),Any], [do,Any], [else,Any], and [case,Any]
-                this.SpaceBetweenStatements = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([18 /* CloseParenToken */, 79 /* DoKeyword */, 80 /* ElseKeyword */, 71 /* CaseKeyword */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNonJsxElementContext, Rules.IsNotForContext), 2 /* Space */));
-                // This low-pri rule takes care of "try {" and "finally {" in case the rule SpaceBeforeOpenBraceInControl didn't execute on FormatOnEnter.
-                this.SpaceAfterTryFinally = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.FromTokens([100 /* TryKeyword */, 85 /* FinallyKeyword */]), 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                //      get x() {}
-                //      set x(val) {}
-                this.SpaceAfterGetSetInMember = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.FromTokens([123 /* GetKeyword */, 131 /* SetKeyword */]), 69 /* Identifier */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext), 2 /* Space */));
-                // Special case for binary operators (that are keywords). For these we have to add a space and shouldn't follow any user options.
-                this.SpaceBeforeBinaryKeywordOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.BinaryKeywordOperators), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
-                this.SpaceAfterBinaryKeywordOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.BinaryKeywordOperators, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
-                // TypeScript-specific higher priority rules
-                // Treat constructor as an identifier in a function declaration, and remove spaces between constructor and following left parentheses
-                this.NoSpaceAfterConstructor = new formatting.Rule(formatting.RuleDescriptor.create1(121 /* ConstructorKeyword */, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                // Use of module as a function call. e.g.: import m2 = module("m2");
-                this.NoSpaceAfterModuleImport = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.FromTokens([125 /* ModuleKeyword */, 129 /* RequireKeyword */]), 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                // Add a space around certain TypeScript keywords
-                this.SpaceAfterCertainTypeScriptKeywords = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([115 /* AbstractKeyword */, 73 /* ClassKeyword */, 122 /* DeclareKeyword */, 77 /* DefaultKeyword */, 81 /* EnumKeyword */, 82 /* ExportKeyword */, 83 /* ExtendsKeyword */, 123 /* GetKeyword */, 106 /* ImplementsKeyword */, 89 /* ImportKeyword */, 107 /* InterfaceKeyword */, 125 /* ModuleKeyword */, 126 /* NamespaceKeyword */, 110 /* PrivateKeyword */, 112 /* PublicKeyword */, 111 /* ProtectedKeyword */, 131 /* SetKeyword */, 113 /* StaticKeyword */, 134 /* TypeKeyword */, 136 /* FromKeyword */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.SpaceBeforeCertainTypeScriptKeywords = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.FromTokens([83 /* ExtendsKeyword */, 106 /* ImplementsKeyword */, 136 /* FromKeyword */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                // Treat string literals in module names as identifiers, and add a space between the literal and the opening Brace braces, e.g.: module "m2" {
-                this.SpaceAfterModuleName = new formatting.Rule(formatting.RuleDescriptor.create1(9 /* StringLiteral */, 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsModuleDeclContext), 2 /* Space */));
-                // Lambda expressions
-                this.SpaceBeforeArrow = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 34 /* EqualsGreaterThanToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.SpaceAfterArrow = new formatting.Rule(formatting.RuleDescriptor.create3(34 /* EqualsGreaterThanToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                // Optional parameters and let args
-                this.NoSpaceAfterEllipsis = new formatting.Rule(formatting.RuleDescriptor.create1(22 /* DotDotDotToken */, 69 /* Identifier */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.NoSpaceAfterOptionalParameters = new formatting.Rule(formatting.RuleDescriptor.create3(53 /* QuestionToken */, formatting.Shared.TokenRange.FromTokens([18 /* CloseParenToken */, 24 /* CommaToken */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 8 /* Delete */));
-                // generics and type assertions
-                this.NoSpaceBeforeOpenAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.TypeNames, 25 /* LessThanToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8 /* Delete */));
-                this.NoSpaceBetweenCloseParenAndAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create1(18 /* CloseParenToken */, 25 /* LessThanToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8 /* Delete */));
-                this.NoSpaceAfterOpenAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create3(25 /* LessThanToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8 /* Delete */));
-                this.NoSpaceBeforeCloseAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 27 /* GreaterThanToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8 /* Delete */));
-                this.NoSpaceAfterCloseAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create3(27 /* GreaterThanToken */, formatting.Shared.TokenRange.FromTokens([17 /* OpenParenToken */, 19 /* OpenBracketToken */, 27 /* GreaterThanToken */, 24 /* CommaToken */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8 /* Delete */));
-                // Remove spaces in empty interface literals. e.g.: x: {}
-                this.NoSpaceBetweenEmptyInterfaceBraceBrackets = new formatting.Rule(formatting.RuleDescriptor.create1(15 /* OpenBraceToken */, 16 /* CloseBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsObjectTypeContext), 8 /* Delete */));
-                // decorators
-                this.SpaceBeforeAt = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 55 /* AtToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.NoSpaceAfterAt = new formatting.Rule(formatting.RuleDescriptor.create3(55 /* AtToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.SpaceAfterDecorator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.FromTokens([115 /* AbstractKeyword */, 69 /* Identifier */, 82 /* ExportKeyword */, 77 /* DefaultKeyword */, 73 /* ClassKeyword */, 113 /* StaticKeyword */, 112 /* PublicKeyword */, 110 /* PrivateKeyword */, 111 /* ProtectedKeyword */, 123 /* GetKeyword */, 131 /* SetKeyword */, 19 /* OpenBracketToken */, 37 /* AsteriskToken */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsEndOfDecoratorContextOnSameLine), 2 /* Space */));
-                this.NoSpaceBetweenFunctionKeywordAndStar = new formatting.Rule(formatting.RuleDescriptor.create1(87 /* FunctionKeyword */, 37 /* AsteriskToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclarationOrFunctionExpressionContext), 8 /* Delete */));
-                this.SpaceAfterStarInGeneratorDeclaration = new formatting.Rule(formatting.RuleDescriptor.create3(37 /* AsteriskToken */, formatting.Shared.TokenRange.FromTokens([69 /* Identifier */, 17 /* OpenParenToken */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclarationOrFunctionExpressionContext), 2 /* Space */));
-                this.NoSpaceBetweenYieldKeywordAndStar = new formatting.Rule(formatting.RuleDescriptor.create1(114 /* YieldKeyword */, 37 /* AsteriskToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsYieldOrYieldStarWithOperand), 8 /* Delete */));
-                this.SpaceBetweenYieldOrYieldStarAndOperand = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([114 /* YieldKeyword */, 37 /* AsteriskToken */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsYieldOrYieldStarWithOperand), 2 /* Space */));
-                // Async-await
-                this.SpaceBetweenAsyncAndOpenParen = new formatting.Rule(formatting.RuleDescriptor.create1(118 /* AsyncKeyword */, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsArrowFunctionContext, Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.SpaceBetweenAsyncAndFunctionKeyword = new formatting.Rule(formatting.RuleDescriptor.create1(118 /* AsyncKeyword */, 87 /* FunctionKeyword */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                // template string
-                this.NoSpaceBetweenTagAndTemplateString = new formatting.Rule(formatting.RuleDescriptor.create3(69 /* Identifier */, formatting.Shared.TokenRange.FromTokens([11 /* NoSubstitutionTemplateLiteral */, 12 /* TemplateHead */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                // jsx opening element
-                this.SpaceBeforeJsxAttribute = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 69 /* Identifier */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNextTokenParentJsxAttribute, Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.SpaceBeforeSlashInJsxOpeningElement = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 39 /* SlashToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsJsxSelfClosingElementContext, Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.NoSpaceBeforeGreaterThanTokenInJsxOpeningElement = new formatting.Rule(formatting.RuleDescriptor.create1(39 /* SlashToken */, 27 /* GreaterThanToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsJsxSelfClosingElementContext, Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.NoSpaceBeforeEqualInJsxAttribute = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 56 /* EqualsToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsJsxAttributeContext, Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.NoSpaceAfterEqualInJsxAttribute = new formatting.Rule(formatting.RuleDescriptor.create3(56 /* EqualsToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsJsxAttributeContext, Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                // These rules are higher in priority than user-configurable rules.
-                this.HighPriorityCommonRules = [
-                    this.IgnoreBeforeComment, this.IgnoreAfterLineComment,
-                    this.NoSpaceBeforeColon, this.SpaceAfterColon, this.NoSpaceBeforeQuestionMark, this.SpaceAfterQuestionMarkInConditionalOperator,
-                    this.NoSpaceAfterQuestionMark,
-                    this.NoSpaceBeforeDot, this.NoSpaceAfterDot,
-                    this.NoSpaceAfterUnaryPrefixOperator,
-                    this.NoSpaceAfterUnaryPreincrementOperator, this.NoSpaceAfterUnaryPredecrementOperator,
-                    this.NoSpaceBeforeUnaryPostincrementOperator, this.NoSpaceBeforeUnaryPostdecrementOperator,
-                    this.SpaceAfterPostincrementWhenFollowedByAdd,
-                    this.SpaceAfterAddWhenFollowedByUnaryPlus, this.SpaceAfterAddWhenFollowedByPreincrement,
-                    this.SpaceAfterPostdecrementWhenFollowedBySubtract,
-                    this.SpaceAfterSubtractWhenFollowedByUnaryMinus, this.SpaceAfterSubtractWhenFollowedByPredecrement,
-                    this.NoSpaceAfterCloseBrace,
-                    this.NewLineBeforeCloseBraceInBlockContext,
-                    this.SpaceAfterCloseBrace, this.SpaceBetweenCloseBraceAndElse, this.SpaceBetweenCloseBraceAndWhile, this.NoSpaceBetweenEmptyBraceBrackets,
-                    this.NoSpaceBetweenFunctionKeywordAndStar, this.SpaceAfterStarInGeneratorDeclaration,
-                    this.SpaceAfterFunctionInFuncDecl, this.NewLineAfterOpenBraceInBlockContext, this.SpaceAfterGetSetInMember,
-                    this.NoSpaceBetweenYieldKeywordAndStar, this.SpaceBetweenYieldOrYieldStarAndOperand,
-                    this.NoSpaceBetweenReturnAndSemicolon,
-                    this.SpaceAfterCertainKeywords,
-                    this.SpaceAfterLetConstInVariableDeclaration,
-                    this.NoSpaceBeforeOpenParenInFuncCall,
-                    this.SpaceBeforeBinaryKeywordOperator, this.SpaceAfterBinaryKeywordOperator,
-                    this.SpaceAfterVoidOperator,
-                    this.SpaceBetweenAsyncAndOpenParen, this.SpaceBetweenAsyncAndFunctionKeyword,
-                    this.NoSpaceBetweenTagAndTemplateString,
-                    this.SpaceBeforeJsxAttribute, this.SpaceBeforeSlashInJsxOpeningElement, this.NoSpaceBeforeGreaterThanTokenInJsxOpeningElement,
-                    this.NoSpaceBeforeEqualInJsxAttribute, this.NoSpaceAfterEqualInJsxAttribute,
-                    // TypeScript-specific rules
-                    this.NoSpaceAfterConstructor, this.NoSpaceAfterModuleImport,
-                    this.SpaceAfterCertainTypeScriptKeywords, this.SpaceBeforeCertainTypeScriptKeywords,
-                    this.SpaceAfterModuleName,
-                    this.SpaceBeforeArrow, this.SpaceAfterArrow,
-                    this.NoSpaceAfterEllipsis,
-                    this.NoSpaceAfterOptionalParameters,
-                    this.NoSpaceBetweenEmptyInterfaceBraceBrackets,
-                    this.NoSpaceBeforeOpenAngularBracket,
-                    this.NoSpaceBetweenCloseParenAndAngularBracket,
-                    this.NoSpaceAfterOpenAngularBracket,
-                    this.NoSpaceBeforeCloseAngularBracket,
-                    this.NoSpaceAfterCloseAngularBracket,
-                    this.SpaceBeforeAt,
-                    this.NoSpaceAfterAt,
-                    this.SpaceAfterDecorator,
-                ];
-                // These rules are lower in priority than user-configurable rules.
-                this.LowPriorityCommonRules = [
-                    this.NoSpaceBeforeSemicolon,
-                    this.SpaceBeforeOpenBraceInControl, this.SpaceBeforeOpenBraceInFunction, this.SpaceBeforeOpenBraceInTypeScriptDeclWithBlock,
-                    this.NoSpaceBeforeComma,
-                    this.NoSpaceBeforeOpenBracket,
-                    this.NoSpaceAfterCloseBracket,
-                    this.SpaceAfterSemicolon,
-                    this.NoSpaceBeforeOpenParenInFuncDecl,
-                    this.SpaceBetweenStatements, this.SpaceAfterTryFinally
-                ];
-                ///
-                /// Rules controlled by user options
-                ///
-                // Insert space after comma delimiter
-                this.SpaceAfterComma = new formatting.Rule(formatting.RuleDescriptor.create3(24 /* CommaToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNonJsxElementContext, Rules.IsNextTokenNotCloseBracket), 2 /* Space */));
-                this.NoSpaceAfterComma = new formatting.Rule(formatting.RuleDescriptor.create3(24 /* CommaToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNonJsxElementContext), 8 /* Delete */));
-                // Insert space before and after binary operators
-                this.SpaceBeforeBinaryOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.BinaryOperators), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
-                this.SpaceAfterBinaryOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.BinaryOperators, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
-                this.NoSpaceBeforeBinaryOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.BinaryOperators), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 8 /* Delete */));
-                this.NoSpaceAfterBinaryOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.BinaryOperators, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 8 /* Delete */));
-                // Insert space after keywords in control flow statements
-                this.SpaceAfterKeywordInControl = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Keywords, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsControlDeclContext), 2 /* Space */));
-                this.NoSpaceAfterKeywordInControl = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Keywords, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsControlDeclContext), 8 /* Delete */));
-                // Open Brace braces after function
-                // TypeScript: Function can have return types, which can be made of tons of different token kinds
-                this.NewLineBeforeOpenBraceInFunction = new formatting.Rule(formatting.RuleDescriptor.create2(this.FunctionOpenBraceLeftTokenRange, 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext, Rules.IsBeforeMultilineBlockContext), 4 /* NewLine */), 1 /* CanDeleteNewLines */);
-                // Open Brace braces after TypeScript module/class/interface
-                this.NewLineBeforeOpenBraceInTypeScriptDeclWithBlock = new formatting.Rule(formatting.RuleDescriptor.create2(this.TypeScriptOpenBraceLeftTokenRange, 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsTypeScriptDeclWithBlockContext, Rules.IsBeforeMultilineBlockContext), 4 /* NewLine */), 1 /* CanDeleteNewLines */);
-                // Open Brace braces after control block
-                this.NewLineBeforeOpenBraceInControl = new formatting.Rule(formatting.RuleDescriptor.create2(this.ControlOpenBraceLeftTokenRange, 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsControlDeclContext, Rules.IsBeforeMultilineBlockContext), 4 /* NewLine */), 1 /* CanDeleteNewLines */);
-                // Insert space after semicolon in for statement
-                this.SpaceAfterSemicolonInFor = new formatting.Rule(formatting.RuleDescriptor.create3(23 /* SemicolonToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsForContext), 2 /* Space */));
-                this.NoSpaceAfterSemicolonInFor = new formatting.Rule(formatting.RuleDescriptor.create3(23 /* SemicolonToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsForContext), 8 /* Delete */));
-                // Insert space after opening and before closing nonempty parenthesis
-                this.SpaceAfterOpenParen = new formatting.Rule(formatting.RuleDescriptor.create3(17 /* OpenParenToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.SpaceBeforeCloseParen = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 18 /* CloseParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.NoSpaceBetweenParens = new formatting.Rule(formatting.RuleDescriptor.create1(17 /* OpenParenToken */, 18 /* CloseParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.NoSpaceAfterOpenParen = new formatting.Rule(formatting.RuleDescriptor.create3(17 /* OpenParenToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.NoSpaceBeforeCloseParen = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 18 /* CloseParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                // Insert space after opening and before closing nonempty brackets
-                this.SpaceAfterOpenBracket = new formatting.Rule(formatting.RuleDescriptor.create3(19 /* OpenBracketToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.SpaceBeforeCloseBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 20 /* CloseBracketToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.NoSpaceBetweenBrackets = new formatting.Rule(formatting.RuleDescriptor.create1(19 /* OpenBracketToken */, 20 /* CloseBracketToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.NoSpaceAfterOpenBracket = new formatting.Rule(formatting.RuleDescriptor.create3(19 /* OpenBracketToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.NoSpaceBeforeCloseBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 20 /* CloseBracketToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                // Insert space after opening and before closing template string braces
-                this.NoSpaceAfterTemplateHeadAndMiddle = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([12 /* TemplateHead */, 13 /* TemplateMiddle */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.SpaceAfterTemplateHeadAndMiddle = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([12 /* TemplateHead */, 13 /* TemplateMiddle */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.NoSpaceBeforeTemplateMiddleAndTail = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.FromTokens([13 /* TemplateMiddle */, 14 /* TemplateTail */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.SpaceBeforeTemplateMiddleAndTail = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.FromTokens([13 /* TemplateMiddle */, 14 /* TemplateTail */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                // No space after { and before } in JSX expression
-                this.NoSpaceAfterOpenBraceInJsxExpression = new formatting.Rule(formatting.RuleDescriptor.create3(15 /* OpenBraceToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsJsxExpressionContext), 8 /* Delete */));
-                this.SpaceAfterOpenBraceInJsxExpression = new formatting.Rule(formatting.RuleDescriptor.create3(15 /* OpenBraceToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsJsxExpressionContext), 2 /* Space */));
-                this.NoSpaceBeforeCloseBraceInJsxExpression = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 16 /* CloseBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsJsxExpressionContext), 8 /* Delete */));
-                this.SpaceBeforeCloseBraceInJsxExpression = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 16 /* CloseBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsJsxExpressionContext), 2 /* Space */));
-                // Insert space after function keyword for anonymous functions
-                this.SpaceAfterAnonymousFunctionKeyword = new formatting.Rule(formatting.RuleDescriptor.create1(87 /* FunctionKeyword */, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext), 2 /* Space */));
-                this.NoSpaceAfterAnonymousFunctionKeyword = new formatting.Rule(formatting.RuleDescriptor.create1(87 /* FunctionKeyword */, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext), 8 /* Delete */));
-                // No space after type assertion
-                this.NoSpaceAfterTypeAssertion = new formatting.Rule(formatting.RuleDescriptor.create3(27 /* GreaterThanToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeAssertionContext), 8 /* Delete */));
-                this.SpaceAfterTypeAssertion = new formatting.Rule(formatting.RuleDescriptor.create3(27 /* GreaterThanToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeAssertionContext), 2 /* Space */));
             }
-            Rules.prototype.getRuleName = function (rule) {
-                var o = this;
-                for (var name_54 in o) {
-                    if (o[name_54] === rule) {
-                        return name_54;
+            formattingScanner.close();
+            return edits;
+            // local functions
+            /** Tries to compute the indentation for a list element.
+             * If list element is not in range then
+             * function will pick its actual indentation
+             * so it can be pushed downstream as inherited indentation.
+             * If list element is in the range - its indentation will be equal
+             * to inherited indentation from its predecessors.
+             */
+            function tryComputeIndentationForListItem(startPos, endPos, parentStartLine, range, inheritedIndentation) {
+                if (ts.rangeOverlapsWithStartEnd(range, startPos, endPos) ||
+                    ts.rangeContainsStartEnd(range, startPos, endPos) /* Not to miss zero-range nodes e.g. JsxText */) {
+                    if (inheritedIndentation !== -1 /* Unknown */) {
+                        return inheritedIndentation;
                     }
                 }
-                throw new Error("Unknown rule");
-            };
-            ///
-            /// Contexts
-            ///
-            Rules.IsForContext = function (context) {
-                return context.contextNode.kind === 206 /* ForStatement */;
-            };
-            Rules.IsNotForContext = function (context) {
-                return !Rules.IsForContext(context);
-            };
-            Rules.IsBinaryOpContext = function (context) {
-                switch (context.contextNode.kind) {
-                    case 187 /* BinaryExpression */:
-                    case 188 /* ConditionalExpression */:
-                    case 195 /* AsExpression */:
-                    case 238 /* ExportSpecifier */:
-                    case 234 /* ImportSpecifier */:
-                    case 154 /* TypePredicate */:
-                    case 162 /* UnionType */:
-                    case 163 /* IntersectionType */:
-                        return true;
-                    // equals in binding elements: function foo([[x, y] = [1, 2]])
-                    case 169 /* BindingElement */:
-                    // equals in type X = ...
-                    case 223 /* TypeAliasDeclaration */:
-                    // equal in import a = module('a');
-                    case 229 /* ImportEqualsDeclaration */:
-                    // equal in let a = 0;
-                    case 218 /* VariableDeclaration */:
-                    // equal in p = 0;
-                    case 142 /* Parameter */:
-                    case 255 /* EnumMember */:
-                    case 145 /* PropertyDeclaration */:
-                    case 144 /* PropertySignature */:
-                        return context.currentTokenSpan.kind === 56 /* EqualsToken */ || context.nextTokenSpan.kind === 56 /* EqualsToken */;
-                    // "in" keyword in for (let x in []) { }
-                    case 207 /* ForInStatement */:
-                        return context.currentTokenSpan.kind === 90 /* InKeyword */ || context.nextTokenSpan.kind === 90 /* InKeyword */;
-                    // Technically, "of" is not a binary operator, but format it the same way as "in"
-                    case 208 /* ForOfStatement */:
-                        return context.currentTokenSpan.kind === 138 /* OfKeyword */ || context.nextTokenSpan.kind === 138 /* OfKeyword */;
+                else {
+                    var startLine = sourceFile.getLineAndCharacterOfPosition(startPos).line;
+                    var startLinePosition = ts.getLineStartPositionForPosition(startPos, sourceFile);
+                    var column = formatting.SmartIndenter.findFirstNonWhitespaceColumn(startLinePosition, startPos, sourceFile, options);
+                    if (startLine !== parentStartLine || startPos === column) {
+                        // Use the base indent size if it is greater than
+                        // the indentation of the inherited predecessor.
+                        var baseIndentSize = formatting.SmartIndenter.getBaseIndentation(options);
+                        return baseIndentSize > column ? baseIndentSize : column;
+                    }
                 }
-                return false;
-            };
-            Rules.IsNotBinaryOpContext = function (context) {
-                return !Rules.IsBinaryOpContext(context);
-            };
-            Rules.IsConditionalOperatorContext = function (context) {
-                return context.contextNode.kind === 188 /* ConditionalExpression */;
-            };
-            Rules.IsSameLineTokenOrBeforeMultilineBlockContext = function (context) {
-                //// This check is mainly used inside SpaceBeforeOpenBraceInControl and SpaceBeforeOpenBraceInFunction.
-                ////
-                //// Ex:
-                //// if (1)     { ....
-                ////      * ) and { are on the same line so apply the rule. Here we don't care whether it's same or multi block context
-                ////
-                //// Ex:
-                //// if (1)
-                //// { ... }
-                ////      * ) and { are on different lines. We only need to format if the block is multiline context. So in this case we don't format.
-                ////
-                //// Ex:
-                //// if (1)
-                //// { ...
-                //// }
-                ////      * ) and { are on different lines. We only need to format if the block is multiline context. So in this case we format.
-                return context.TokensAreOnSameLine() || Rules.IsBeforeMultilineBlockContext(context);
-            };
-            // This check is done before an open brace in a control construct, a function, or a typescript block declaration
-            Rules.IsBeforeMultilineBlockContext = function (context) {
-                return Rules.IsBeforeBlockContext(context) && !(context.NextNodeAllOnSameLine() || context.NextNodeBlockIsOnOneLine());
-            };
-            Rules.IsMultilineBlockContext = function (context) {
-                return Rules.IsBlockContext(context) && !(context.ContextNodeAllOnSameLine() || context.ContextNodeBlockIsOnOneLine());
-            };
-            Rules.IsSingleLineBlockContext = function (context) {
-                return Rules.IsBlockContext(context) && (context.ContextNodeAllOnSameLine() || context.ContextNodeBlockIsOnOneLine());
-            };
-            Rules.IsBlockContext = function (context) {
-                return Rules.NodeIsBlockContext(context.contextNode);
-            };
-            Rules.IsBeforeBlockContext = function (context) {
-                return Rules.NodeIsBlockContext(context.nextTokenParent);
-            };
-            // IMPORTANT!!! This method must return true ONLY for nodes with open and close braces as immediate children
-            Rules.NodeIsBlockContext = function (node) {
-                if (Rules.NodeIsTypeScriptDeclWithBlockContext(node)) {
-                    // This means we are in a context that looks like a block to the user, but in the grammar is actually not a node (it's a class, module, enum, object type literal, etc).
-                    return true;
+                return -1 /* Unknown */;
+            }
+            function computeIndentation(node, startLine, inheritedIndentation, parent, parentDynamicIndentation, effectiveParentStartLine) {
+                var indentation = inheritedIndentation;
+                var delta = formatting.SmartIndenter.shouldIndentChildNode(node) ? options.indentSize : 0;
+                if (effectiveParentStartLine === startLine) {
+                    // if node is located on the same line with the parent
+                    // - inherit indentation from the parent
+                    // - push children if either parent of node itself has non-zero delta
+                    indentation = startLine === lastIndentedLine
+                        ? indentationOnLastIndentedLine
+                        : parentDynamicIndentation.getIndentation();
+                    delta = Math.min(options.indentSize, parentDynamicIndentation.getDelta(node) + delta);
                 }
-                switch (node.kind) {
-                    case 199 /* Block */:
-                    case 227 /* CaseBlock */:
-                    case 171 /* ObjectLiteralExpression */:
-                    case 226 /* ModuleBlock */:
-                        return true;
+                else if (indentation === -1 /* Unknown */) {
+                    if (formatting.SmartIndenter.childStartsOnTheSameLineWithElseInIfStatement(parent, node, startLine, sourceFile)) {
+                        indentation = parentDynamicIndentation.getIndentation();
+                    }
+                    else {
+                        indentation = parentDynamicIndentation.getIndentation() + parentDynamicIndentation.getDelta(node);
+                    }
                 }
-                return false;
-            };
-            Rules.IsFunctionDeclContext = function (context) {
-                switch (context.contextNode.kind) {
-                    case 220 /* FunctionDeclaration */:
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                    // case SyntaxKind.MemberFunctionDeclaration:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                    // case SyntaxKind.MethodSignature:
-                    case 151 /* CallSignature */:
-                    case 179 /* FunctionExpression */:
-                    case 148 /* Constructor */:
-                    case 180 /* ArrowFunction */:
-                    // case SyntaxKind.ConstructorDeclaration:
-                    // case SyntaxKind.SimpleArrowFunctionExpression:
-                    // case SyntaxKind.ParenthesizedArrowFunctionExpression:
-                    case 222 /* InterfaceDeclaration */:
-                        return true;
+                return {
+                    indentation: indentation,
+                    delta: delta
+                };
+            }
+            function getFirstNonDecoratorTokenOfNode(node) {
+                if (node.modifiers && node.modifiers.length) {
+                    return node.modifiers[0].kind;
                 }
-                return false;
-            };
-            Rules.IsFunctionDeclarationOrFunctionExpressionContext = function (context) {
-                return context.contextNode.kind === 220 /* FunctionDeclaration */ || context.contextNode.kind === 179 /* FunctionExpression */;
-            };
-            Rules.IsTypeScriptDeclWithBlockContext = function (context) {
-                return Rules.NodeIsTypeScriptDeclWithBlockContext(context.contextNode);
-            };
-            Rules.NodeIsTypeScriptDeclWithBlockContext = function (node) {
                 switch (node.kind) {
-                    case 221 /* ClassDeclaration */:
-                    case 192 /* ClassExpression */:
-                    case 222 /* InterfaceDeclaration */:
-                    case 224 /* EnumDeclaration */:
-                    case 159 /* TypeLiteral */:
-                    case 225 /* ModuleDeclaration */:
-                    case 236 /* ExportDeclaration */:
-                    case 237 /* NamedExports */:
-                    case 230 /* ImportDeclaration */:
-                    case 233 /* NamedImports */:
-                        return true;
+                    case 229 /* ClassDeclaration */: return 75 /* ClassKeyword */;
+                    case 230 /* InterfaceDeclaration */: return 109 /* InterfaceKeyword */;
+                    case 228 /* FunctionDeclaration */: return 89 /* FunctionKeyword */;
+                    case 232 /* EnumDeclaration */: return 232 /* EnumDeclaration */;
+                    case 153 /* GetAccessor */: return 125 /* GetKeyword */;
+                    case 154 /* SetAccessor */: return 135 /* SetKeyword */;
+                    case 151 /* MethodDeclaration */:
+                        if (node.asteriskToken) {
+                            return 39 /* AsteriskToken */;
+                        }
+                    // falls through
+                    case 149 /* PropertyDeclaration */:
+                    case 146 /* Parameter */:
+                        return ts.getNameOfDeclaration(node).kind;
                 }
-                return false;
-            };
-            Rules.IsAfterCodeBlockContext = function (context) {
-                switch (context.currentTokenParent.kind) {
-                    case 221 /* ClassDeclaration */:
-                    case 225 /* ModuleDeclaration */:
-                    case 224 /* EnumDeclaration */:
-                    case 199 /* Block */:
-                    case 252 /* CatchClause */:
-                    case 226 /* ModuleBlock */:
-                    case 213 /* SwitchStatement */:
-                        return true;
+            }
+            function getDynamicIndentation(node, nodeStartLine, indentation, delta) {
+                return {
+                    getIndentationForComment: function (kind, tokenIndentation, container) {
+                        switch (kind) {
+                            // preceding comment to the token that closes the indentation scope inherits the indentation from the scope
+                            // ..  {
+                            //     // comment
+                            // }
+                            case 18 /* CloseBraceToken */:
+                            case 22 /* CloseBracketToken */:
+                            case 20 /* CloseParenToken */:
+                                return indentation + getEffectiveDelta(delta, container);
+                        }
+                        return tokenIndentation !== -1 /* Unknown */ ? tokenIndentation : indentation;
+                    },
+                    getIndentationForToken: function (line, kind, container) {
+                        if (nodeStartLine !== line && node.decorators) {
+                            if (kind === getFirstNonDecoratorTokenOfNode(node)) {
+                                // if this token is the first token following the list of decorators, we do not need to indent
+                                return indentation;
+                            }
+                        }
+                        switch (kind) {
+                            // open and close brace, 'else' and 'while' (in do statement) tokens has indentation of the parent
+                            case 17 /* OpenBraceToken */:
+                            case 18 /* CloseBraceToken */:
+                            case 19 /* OpenParenToken */:
+                            case 20 /* CloseParenToken */:
+                            case 82 /* ElseKeyword */:
+                            case 106 /* WhileKeyword */:
+                            case 57 /* AtToken */:
+                                return indentation;
+                            case 41 /* SlashToken */:
+                            case 29 /* GreaterThanToken */: {
+                                if (container.kind === 251 /* JsxOpeningElement */ ||
+                                    container.kind === 252 /* JsxClosingElement */ ||
+                                    container.kind === 250 /* JsxSelfClosingElement */) {
+                                    return indentation;
+                                }
+                                break;
+                            }
+                            case 21 /* OpenBracketToken */:
+                            case 22 /* CloseBracketToken */: {
+                                if (container.kind !== 172 /* MappedType */) {
+                                    return indentation;
+                                }
+                                break;
+                            }
+                        }
+                        // if token line equals to the line of containing node (this is a first token in the node) - use node indentation
+                        return nodeStartLine !== line ? indentation + getEffectiveDelta(delta, container) : indentation;
+                    },
+                    getIndentation: function () { return indentation; },
+                    getDelta: function (child) { return getEffectiveDelta(delta, child); },
+                    recomputeIndentation: function (lineAdded) {
+                        if (node.parent && formatting.SmartIndenter.shouldIndentChildNode(node.parent, node)) {
+                            if (lineAdded) {
+                                indentation += options.indentSize;
+                            }
+                            else {
+                                indentation -= options.indentSize;
+                            }
+                            if (formatting.SmartIndenter.shouldIndentChildNode(node)) {
+                                delta = options.indentSize;
+                            }
+                            else {
+                                delta = 0;
+                            }
+                        }
+                    }
+                };
+                function getEffectiveDelta(delta, child) {
+                    // Delta value should be zero when the node explicitly prevents indentation of the child node
+                    return formatting.SmartIndenter.nodeWillIndentChild(node, child, /*indentByDefault*/ true) ? delta : 0;
                 }
-                return false;
-            };
-            Rules.IsControlDeclContext = function (context) {
-                switch (context.contextNode.kind) {
-                    case 203 /* IfStatement */:
-                    case 213 /* SwitchStatement */:
-                    case 206 /* ForStatement */:
-                    case 207 /* ForInStatement */:
-                    case 208 /* ForOfStatement */:
-                    case 205 /* WhileStatement */:
-                    case 216 /* TryStatement */:
-                    case 204 /* DoStatement */:
-                    case 212 /* WithStatement */:
-                    // TODO
-                    // case SyntaxKind.ElseClause:
-                    case 252 /* CatchClause */:
-                        return true;
-                    default:
-                        return false;
+            }
+            function processNode(node, contextNode, nodeStartLine, undecoratedNodeStartLine, indentation, delta) {
+                if (!ts.rangeOverlapsWithStartEnd(originalRange, node.getStart(sourceFile), node.getEnd())) {
+                    return;
                 }
-            };
-            Rules.IsObjectContext = function (context) {
-                return context.contextNode.kind === 171 /* ObjectLiteralExpression */;
-            };
-            Rules.IsFunctionCallContext = function (context) {
-                return context.contextNode.kind === 174 /* CallExpression */;
-            };
-            Rules.IsNewContext = function (context) {
-                return context.contextNode.kind === 175 /* NewExpression */;
-            };
-            Rules.IsFunctionCallOrNewContext = function (context) {
-                return Rules.IsFunctionCallContext(context) || Rules.IsNewContext(context);
-            };
-            Rules.IsPreviousTokenNotComma = function (context) {
-                return context.currentTokenSpan.kind !== 24 /* CommaToken */;
-            };
-            Rules.IsNextTokenNotCloseBracket = function (context) {
-                return context.nextTokenSpan.kind !== 20 /* CloseBracketToken */;
-            };
-            Rules.IsArrowFunctionContext = function (context) {
-                return context.contextNode.kind === 180 /* ArrowFunction */;
-            };
-            Rules.IsNonJsxSameLineTokenContext = function (context) {
-                return context.TokensAreOnSameLine() && context.contextNode.kind !== 244 /* JsxText */;
-            };
-            Rules.IsNonJsxElementContext = function (context) {
-                return context.contextNode.kind !== 241 /* JsxElement */;
-            };
-            Rules.IsJsxExpressionContext = function (context) {
-                return context.contextNode.kind === 248 /* JsxExpression */;
-            };
-            Rules.IsNextTokenParentJsxAttribute = function (context) {
-                return context.nextTokenParent.kind === 246 /* JsxAttribute */;
-            };
-            Rules.IsJsxAttributeContext = function (context) {
-                return context.contextNode.kind === 246 /* JsxAttribute */;
-            };
-            Rules.IsJsxSelfClosingElementContext = function (context) {
-                return context.contextNode.kind === 242 /* JsxSelfClosingElement */;
-            };
-            Rules.IsNotBeforeBlockInFunctionDeclarationContext = function (context) {
-                return !Rules.IsFunctionDeclContext(context) && !Rules.IsBeforeBlockContext(context);
-            };
-            Rules.IsEndOfDecoratorContextOnSameLine = function (context) {
-                return context.TokensAreOnSameLine() &&
-                    context.contextNode.decorators &&
-                    Rules.NodeIsInDecoratorContext(context.currentTokenParent) &&
-                    !Rules.NodeIsInDecoratorContext(context.nextTokenParent);
-            };
-            Rules.NodeIsInDecoratorContext = function (node) {
-                while (ts.isPartOfExpression(node)) {
-                    node = node.parent;
+                var nodeDynamicIndentation = getDynamicIndentation(node, nodeStartLine, indentation, delta);
+                // a useful observations when tracking context node
+                //        /
+                //      [a]
+                //   /   |   \
+                //  [b] [c] [d]
+                // node 'a' is a context node for nodes 'b', 'c', 'd'
+                // except for the leftmost leaf token in [b] - in this case context node ('e') is located somewhere above 'a'
+                // this rule can be applied recursively to child nodes of 'a'.
+                //
+                // context node is set to parent node value after processing every child node
+                // context node is set to parent of the token after processing every token
+                var childContextNode = contextNode;
+                // if there are any tokens that logically belong to node and interleave child nodes
+                // such tokens will be consumed in processChildNode for for the child that follows them
+                ts.forEachChild(node, function (child) {
+                    processChildNode(child, /*inheritedIndentation*/ -1 /* Unknown */, node, nodeDynamicIndentation, nodeStartLine, undecoratedNodeStartLine, /*isListItem*/ false);
+                }, function (nodes) {
+                    processChildNodes(nodes, node, nodeStartLine, nodeDynamicIndentation);
+                });
+                // proceed any tokens in the node that are located after child nodes
+                while (formattingScanner.isOnToken()) {
+                    var tokenInfo = formattingScanner.readTokenInfo(node);
+                    if (tokenInfo.token.end > node.end) {
+                        break;
+                    }
+                    consumeTokenAndAdvanceScanner(tokenInfo, node, nodeDynamicIndentation, node);
                 }
-                return node.kind === 143 /* Decorator */;
-            };
-            Rules.IsStartOfVariableDeclarationList = function (context) {
-                return context.currentTokenParent.kind === 219 /* VariableDeclarationList */ &&
-                    context.currentTokenParent.getStart(context.sourceFile) === context.currentTokenSpan.pos;
-            };
-            Rules.IsNotFormatOnEnter = function (context) {
-                return context.formattingRequestKind !== 2 /* FormatOnEnter */;
-            };
-            Rules.IsModuleDeclContext = function (context) {
-                return context.contextNode.kind === 225 /* ModuleDeclaration */;
-            };
-            Rules.IsObjectTypeContext = function (context) {
-                return context.contextNode.kind === 159 /* TypeLiteral */; // && context.contextNode.parent.kind !== SyntaxKind.InterfaceDeclaration;
-            };
-            Rules.IsTypeArgumentOrParameterOrAssertion = function (token, parent) {
-                if (token.kind !== 25 /* LessThanToken */ && token.kind !== 27 /* GreaterThanToken */) {
-                    return false;
+                function processChildNode(child, inheritedIndentation, parent, parentDynamicIndentation, parentStartLine, undecoratedParentStartLine, isListItem, isFirstListItem) {
+                    var childStartPos = child.getStart(sourceFile);
+                    var childStartLine = sourceFile.getLineAndCharacterOfPosition(childStartPos).line;
+                    var undecoratedChildStartLine = childStartLine;
+                    if (child.decorators) {
+                        undecoratedChildStartLine = sourceFile.getLineAndCharacterOfPosition(ts.getNonDecoratorTokenPosOfNode(child, sourceFile)).line;
+                    }
+                    // if child is a list item - try to get its indentation
+                    var childIndentationAmount = -1 /* Unknown */;
+                    if (isListItem) {
+                        childIndentationAmount = tryComputeIndentationForListItem(childStartPos, child.end, parentStartLine, originalRange, inheritedIndentation);
+                        if (childIndentationAmount !== -1 /* Unknown */) {
+                            inheritedIndentation = childIndentationAmount;
+                        }
+                    }
+                    // child node is outside the target range - do not dive inside
+                    if (!ts.rangeOverlapsWithStartEnd(originalRange, child.pos, child.end)) {
+                        if (child.end < originalRange.pos) {
+                            formattingScanner.skipToEndOf(child);
+                        }
+                        return inheritedIndentation;
+                    }
+                    if (child.getFullWidth() === 0) {
+                        return inheritedIndentation;
+                    }
+                    while (formattingScanner.isOnToken()) {
+                        // proceed any parent tokens that are located prior to child.getStart()
+                        var tokenInfo = formattingScanner.readTokenInfo(node);
+                        if (tokenInfo.token.end > childStartPos) {
+                            // stop when formatting scanner advances past the beginning of the child
+                            break;
+                        }
+                        consumeTokenAndAdvanceScanner(tokenInfo, node, parentDynamicIndentation, node);
+                    }
+                    if (!formattingScanner.isOnToken()) {
+                        return inheritedIndentation;
+                    }
+                    // JSX text shouldn't affect indenting
+                    if (ts.isToken(child) && child.kind !== 10 /* JsxText */) {
+                        // if child node is a token, it does not impact indentation, proceed it using parent indentation scope rules
+                        var tokenInfo = formattingScanner.readTokenInfo(child);
+                        ts.Debug.assert(tokenInfo.token.end === child.end, "Token end is child end");
+                        consumeTokenAndAdvanceScanner(tokenInfo, node, parentDynamicIndentation, child);
+                        return inheritedIndentation;
+                    }
+                    var effectiveParentStartLine = child.kind === 147 /* Decorator */ ? childStartLine : undecoratedParentStartLine;
+                    var childIndentation = computeIndentation(child, childStartLine, childIndentationAmount, node, parentDynamicIndentation, effectiveParentStartLine);
+                    processNode(child, childContextNode, childStartLine, undecoratedChildStartLine, childIndentation.indentation, childIndentation.delta);
+                    childContextNode = node;
+                    if (isFirstListItem && parent.kind === 177 /* ArrayLiteralExpression */ && inheritedIndentation === -1 /* Unknown */) {
+                        inheritedIndentation = childIndentation.indentation;
+                    }
+                    return inheritedIndentation;
                 }
-                switch (parent.kind) {
-                    case 155 /* TypeReference */:
-                    case 177 /* TypeAssertionExpression */:
-                    case 221 /* ClassDeclaration */:
-                    case 192 /* ClassExpression */:
-                    case 222 /* InterfaceDeclaration */:
-                    case 220 /* FunctionDeclaration */:
-                    case 179 /* FunctionExpression */:
-                    case 180 /* ArrowFunction */:
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                    case 151 /* CallSignature */:
-                    case 152 /* ConstructSignature */:
-                    case 174 /* CallExpression */:
-                    case 175 /* NewExpression */:
-                    case 194 /* ExpressionWithTypeArguments */:
-                        return true;
-                    default:
-                        return false;
+                function processChildNodes(nodes, parent, parentStartLine, parentDynamicIndentation) {
+                    var listStartToken = getOpenTokenForList(parent, nodes);
+                    var listEndToken = getCloseTokenForOpenToken(listStartToken);
+                    var listDynamicIndentation = parentDynamicIndentation;
+                    var startLine = parentStartLine;
+                    if (listStartToken !== 0 /* Unknown */) {
+                        // introduce a new indentation scope for lists (including list start and end tokens)
+                        while (formattingScanner.isOnToken()) {
+                            var tokenInfo = formattingScanner.readTokenInfo(parent);
+                            if (tokenInfo.token.end > nodes.pos) {
+                                // stop when formatting scanner moves past the beginning of node list
+                                break;
+                            }
+                            else if (tokenInfo.token.kind === listStartToken) {
+                                // consume list start token
+                                startLine = sourceFile.getLineAndCharacterOfPosition(tokenInfo.token.pos).line;
+                                var indentation_1 = computeIndentation(tokenInfo.token, startLine, -1 /* Unknown */, parent, parentDynamicIndentation, parentStartLine);
+                                listDynamicIndentation = getDynamicIndentation(parent, parentStartLine, indentation_1.indentation, indentation_1.delta);
+                                consumeTokenAndAdvanceScanner(tokenInfo, parent, listDynamicIndentation, parent);
+                            }
+                            else {
+                                // consume any tokens that precede the list as child elements of 'node' using its indentation scope
+                                consumeTokenAndAdvanceScanner(tokenInfo, parent, parentDynamicIndentation, parent);
+                            }
+                        }
+                    }
+                    var inheritedIndentation = -1 /* Unknown */;
+                    for (var i = 0; i < nodes.length; i++) {
+                        var child = nodes[i];
+                        inheritedIndentation = processChildNode(child, inheritedIndentation, node, listDynamicIndentation, startLine, startLine, /*isListItem*/ true, /*isFirstListItem*/ i === 0);
+                    }
+                    if (listEndToken !== 0 /* Unknown */) {
+                        if (formattingScanner.isOnToken()) {
+                            var tokenInfo = formattingScanner.readTokenInfo(parent);
+                            // consume the list end token only if it is still belong to the parent
+                            // there might be the case when current token matches end token but does not considered as one
+                            // function (x: function) <--
+                            // without this check close paren will be interpreted as list end token for function expression which is wrong
+                            if (tokenInfo.token.kind === listEndToken && ts.rangeContainsRange(parent, tokenInfo.token)) {
+                                // consume list end token
+                                consumeTokenAndAdvanceScanner(tokenInfo, parent, listDynamicIndentation, parent);
+                            }
+                        }
+                    }
                 }
-            };
-            Rules.IsTypeArgumentOrParameterOrAssertionContext = function (context) {
-                return Rules.IsTypeArgumentOrParameterOrAssertion(context.currentTokenSpan, context.currentTokenParent) ||
-                    Rules.IsTypeArgumentOrParameterOrAssertion(context.nextTokenSpan, context.nextTokenParent);
-            };
-            Rules.IsTypeAssertionContext = function (context) {
-                return context.contextNode.kind === 177 /* TypeAssertionExpression */;
-            };
-            Rules.IsVoidOpContext = function (context) {
-                return context.currentTokenSpan.kind === 103 /* VoidKeyword */ && context.currentTokenParent.kind === 183 /* VoidExpression */;
-            };
-            Rules.IsYieldOrYieldStarWithOperand = function (context) {
-                return context.contextNode.kind === 190 /* YieldExpression */ && context.contextNode.expression !== undefined;
-            };
-            return Rules;
-        }());
-        formatting.Rules = Rules;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-///<reference path='references.ts' />
-/* @internal */
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var RulesMap = (function () {
-            function RulesMap() {
-                this.map = [];
-                this.mapRowLength = 0;
-            }
-            RulesMap.create = function (rules) {
-                var result = new RulesMap();
-                result.Initialize(rules);
-                return result;
-            };
-            RulesMap.prototype.Initialize = function (rules) {
-                this.mapRowLength = 138 /* LastToken */ + 1;
-                this.map = new Array(this.mapRowLength * this.mapRowLength); // new Array<RulesBucket>(this.mapRowLength * this.mapRowLength);
-                // This array is used only during construction of the rulesbucket in the map
-                var rulesBucketConstructionStateList = new Array(this.map.length); // new Array<RulesBucketConstructionState>(this.map.length);
-                this.FillRules(rules, rulesBucketConstructionStateList);
-                return this.map;
-            };
-            RulesMap.prototype.FillRules = function (rules, rulesBucketConstructionStateList) {
-                var _this = this;
-                rules.forEach(function (rule) {
-                    _this.FillRule(rule, rulesBucketConstructionStateList);
-                });
-            };
-            RulesMap.prototype.GetRuleBucketIndex = function (row, column) {
-                var rulesBucketIndex = (row * this.mapRowLength) + column;
-                // Debug.Assert(rulesBucketIndex < this.map.Length, "Trying to access an index outside the array.");
-                return rulesBucketIndex;
-            };
-            RulesMap.prototype.FillRule = function (rule, rulesBucketConstructionStateList) {
-                var _this = this;
-                var specificRule = rule.Descriptor.LeftTokenRange !== formatting.Shared.TokenRange.Any &&
-                    rule.Descriptor.RightTokenRange !== formatting.Shared.TokenRange.Any;
-                rule.Descriptor.LeftTokenRange.GetTokens().forEach(function (left) {
-                    rule.Descriptor.RightTokenRange.GetTokens().forEach(function (right) {
-                        var rulesBucketIndex = _this.GetRuleBucketIndex(left, right);
-                        var rulesBucket = _this.map[rulesBucketIndex];
-                        if (rulesBucket === undefined) {
-                            rulesBucket = _this.map[rulesBucketIndex] = new RulesBucket();
+                function consumeTokenAndAdvanceScanner(currentTokenInfo, parent, dynamicIndentation, container) {
+                    ts.Debug.assert(ts.rangeContainsRange(parent, currentTokenInfo.token));
+                    var lastTriviaWasNewLine = formattingScanner.lastTrailingTriviaWasNewLine();
+                    var indentToken = false;
+                    if (currentTokenInfo.leadingTrivia) {
+                        processTrivia(currentTokenInfo.leadingTrivia, parent, childContextNode, dynamicIndentation);
+                    }
+                    var lineAdded;
+                    var isTokenInRange = ts.rangeContainsRange(originalRange, currentTokenInfo.token);
+                    var tokenStart = sourceFile.getLineAndCharacterOfPosition(currentTokenInfo.token.pos);
+                    if (isTokenInRange) {
+                        var rangeHasError = rangeContainsError(currentTokenInfo.token);
+                        // save previousRange since processRange will overwrite this value with current one
+                        var savePreviousRange = previousRange;
+                        lineAdded = processRange(currentTokenInfo.token, tokenStart, parent, childContextNode, dynamicIndentation);
+                        if (rangeHasError) {
+                            // do not indent comments\token if token range overlaps with some error
+                            indentToken = false;
                         }
-                        rulesBucket.AddRule(rule, specificRule, rulesBucketConstructionStateList, rulesBucketIndex);
-                    });
-                });
-            };
-            RulesMap.prototype.GetRule = function (context) {
-                var bucketIndex = this.GetRuleBucketIndex(context.currentTokenSpan.kind, context.nextTokenSpan.kind);
-                var bucket = this.map[bucketIndex];
-                if (bucket) {
-                    for (var _i = 0, _a = bucket.Rules(); _i < _a.length; _i++) {
-                        var rule = _a[_i];
-                        if (rule.Operation.Context.InContext(context)) {
-                            return rule;
+                        else {
+                            if (lineAdded !== undefined) {
+                                indentToken = lineAdded;
+                            }
+                            else {
+                                // indent token only if end line of previous range does not match start line of the token
+                                var prevEndLine = savePreviousRange && sourceFile.getLineAndCharacterOfPosition(savePreviousRange.end).line;
+                                indentToken = lastTriviaWasNewLine && tokenStart.line !== prevEndLine;
+                            }
+                        }
+                    }
+                    if (currentTokenInfo.trailingTrivia) {
+                        processTrivia(currentTokenInfo.trailingTrivia, parent, childContextNode, dynamicIndentation);
+                    }
+                    if (indentToken) {
+                        var tokenIndentation = (isTokenInRange && !rangeContainsError(currentTokenInfo.token)) ?
+                            dynamicIndentation.getIndentationForToken(tokenStart.line, currentTokenInfo.token.kind, container) :
+                            -1 /* Unknown */;
+                        var indentNextTokenOrTrivia = true;
+                        if (currentTokenInfo.leadingTrivia) {
+                            var commentIndentation = dynamicIndentation.getIndentationForComment(currentTokenInfo.token.kind, tokenIndentation, container);
+                            for (var _i = 0, _a = currentTokenInfo.leadingTrivia; _i < _a.length; _i++) {
+                                var triviaItem = _a[_i];
+                                var triviaInRange = ts.rangeContainsRange(originalRange, triviaItem);
+                                switch (triviaItem.kind) {
+                                    case 3 /* MultiLineCommentTrivia */:
+                                        if (triviaInRange) {
+                                            indentMultilineComment(triviaItem, commentIndentation, /*firstLineIsIndented*/ !indentNextTokenOrTrivia);
+                                        }
+                                        indentNextTokenOrTrivia = false;
+                                        break;
+                                    case 2 /* SingleLineCommentTrivia */:
+                                        if (indentNextTokenOrTrivia && triviaInRange) {
+                                            insertIndentation(triviaItem.pos, commentIndentation, /*lineAdded*/ false);
+                                        }
+                                        indentNextTokenOrTrivia = false;
+                                        break;
+                                    case 4 /* NewLineTrivia */:
+                                        indentNextTokenOrTrivia = true;
+                                        break;
+                                }
+                            }
+                        }
+                        // indent token only if is it is in target range and does not overlap with any error ranges
+                        if (tokenIndentation !== -1 /* Unknown */ && indentNextTokenOrTrivia) {
+                            insertIndentation(currentTokenInfo.token.pos, tokenIndentation, lineAdded);
+                            lastIndentedLine = tokenStart.line;
+                            indentationOnLastIndentedLine = tokenIndentation;
                         }
                     }
+                    formattingScanner.advance();
+                    childContextNode = parent;
                 }
-                return undefined;
-            };
-            return RulesMap;
-        }());
-        formatting.RulesMap = RulesMap;
-        var MaskBitSize = 5;
-        var Mask = 0x1f;
-        (function (RulesPosition) {
-            RulesPosition[RulesPosition["IgnoreRulesSpecific"] = 0] = "IgnoreRulesSpecific";
-            RulesPosition[RulesPosition["IgnoreRulesAny"] = MaskBitSize * 1] = "IgnoreRulesAny";
-            RulesPosition[RulesPosition["ContextRulesSpecific"] = MaskBitSize * 2] = "ContextRulesSpecific";
-            RulesPosition[RulesPosition["ContextRulesAny"] = MaskBitSize * 3] = "ContextRulesAny";
-            RulesPosition[RulesPosition["NoContextRulesSpecific"] = MaskBitSize * 4] = "NoContextRulesSpecific";
-            RulesPosition[RulesPosition["NoContextRulesAny"] = MaskBitSize * 5] = "NoContextRulesAny";
-        })(formatting.RulesPosition || (formatting.RulesPosition = {}));
-        var RulesPosition = formatting.RulesPosition;
-        var RulesBucketConstructionState = (function () {
-            function RulesBucketConstructionState() {
-                //// The Rules list contains all the inserted rules into a rulebucket in the following order:
-                ////    1- Ignore rules with specific token combination
-                ////    2- Ignore rules with any token combination
-                ////    3- Context rules with specific token combination
-                ////    4- Context rules with any token combination
-                ////    5- Non-context rules with specific token combination
-                ////    6- Non-context rules with any token combination
-                ////
-                //// The member rulesInsertionIndexBitmap is used to describe the number of rules
-                //// in each sub-bucket (above) hence can be used to know the index of where to insert
-                //// the next rule. It's a bitmap which contains 6 different sections each is given 5 bits.
-                ////
-                //// Example:
-                //// In order to insert a rule to the end of sub-bucket (3), we get the index by adding
-                //// the values in the bitmap segments 3rd, 2nd, and 1st.
-                this.rulesInsertionIndexBitmap = 0;
             }
-            RulesBucketConstructionState.prototype.GetInsertionIndex = function (maskPosition) {
-                var index = 0;
-                var pos = 0;
-                var indexBitmap = this.rulesInsertionIndexBitmap;
-                while (pos <= maskPosition) {
-                    index += (indexBitmap & Mask);
-                    indexBitmap >>= MaskBitSize;
-                    pos += MaskBitSize;
+            function processTrivia(trivia, parent, contextNode, dynamicIndentation) {
+                for (var _i = 0, trivia_1 = trivia; _i < trivia_1.length; _i++) {
+                    var triviaItem = trivia_1[_i];
+                    if (ts.isComment(triviaItem.kind) && ts.rangeContainsRange(originalRange, triviaItem)) {
+                        var triviaItemStart = sourceFile.getLineAndCharacterOfPosition(triviaItem.pos);
+                        processRange(triviaItem, triviaItemStart, parent, contextNode, dynamicIndentation);
+                    }
                 }
-                return index;
-            };
-            RulesBucketConstructionState.prototype.IncreaseInsertionIndex = function (maskPosition) {
-                var value = (this.rulesInsertionIndexBitmap >> maskPosition) & Mask;
-                value++;
-                ts.Debug.assert((value & Mask) === value, "Adding more rules into the sub-bucket than allowed. Maximum allowed is 32 rules.");
-                var temp = this.rulesInsertionIndexBitmap & ~(Mask << maskPosition);
-                temp |= value << maskPosition;
-                this.rulesInsertionIndexBitmap = temp;
-            };
-            return RulesBucketConstructionState;
-        }());
-        formatting.RulesBucketConstructionState = RulesBucketConstructionState;
-        var RulesBucket = (function () {
-            function RulesBucket() {
-                this.rules = [];
             }
-            RulesBucket.prototype.Rules = function () {
-                return this.rules;
-            };
-            RulesBucket.prototype.AddRule = function (rule, specificTokens, constructionState, rulesBucketIndex) {
-                var position;
-                if (rule.Operation.Action === 1 /* Ignore */) {
-                    position = specificTokens ?
-                        RulesPosition.IgnoreRulesSpecific :
-                        RulesPosition.IgnoreRulesAny;
-                }
-                else if (!rule.Operation.Context.IsAny()) {
-                    position = specificTokens ?
-                        RulesPosition.ContextRulesSpecific :
-                        RulesPosition.ContextRulesAny;
-                }
-                else {
-                    position = specificTokens ?
-                        RulesPosition.NoContextRulesSpecific :
-                        RulesPosition.NoContextRulesAny;
-                }
-                var state = constructionState[rulesBucketIndex];
-                if (state === undefined) {
-                    state = constructionState[rulesBucketIndex] = new RulesBucketConstructionState();
+            function processRange(range, rangeStart, parent, contextNode, dynamicIndentation) {
+                var rangeHasError = rangeContainsError(range);
+                var lineAdded;
+                if (!rangeHasError && !previousRangeHasError) {
+                    if (!previousRange) {
+                        // trim whitespaces starting from the beginning of the span up to the current line
+                        var originalStart = sourceFile.getLineAndCharacterOfPosition(originalRange.pos);
+                        trimTrailingWhitespacesForLines(originalStart.line, rangeStart.line);
+                    }
+                    else {
+                        lineAdded =
+                            processPair(range, rangeStart.line, parent, previousRange, previousRangeStartLine, previousParent, contextNode, dynamicIndentation);
+                    }
                 }
-                var index = state.GetInsertionIndex(position);
-                this.rules.splice(index, 0, rule);
-                state.IncreaseInsertionIndex(position);
-            };
-            return RulesBucket;
-        }());
-        formatting.RulesBucket = RulesBucket;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-///<reference path='references.ts' />
-/* @internal */
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var Shared;
-        (function (Shared) {
-            var TokenRangeAccess = (function () {
-                function TokenRangeAccess(from, to, except) {
-                    this.tokens = [];
-                    for (var token = from; token <= to; token++) {
-                        if (ts.indexOf(except, token) < 0) {
-                            this.tokens.push(token);
+                previousRange = range;
+                previousParent = parent;
+                previousRangeStartLine = rangeStart.line;
+                previousRangeHasError = rangeHasError;
+                return lineAdded;
+            }
+            function processPair(currentItem, currentStartLine, currentParent, previousItem, previousStartLine, previousParent, contextNode, dynamicIndentation) {
+                formattingContext.updateContext(previousItem, previousParent, currentItem, currentParent, contextNode);
+                var rule = rulesProvider.getRulesMap().GetRule(formattingContext);
+                var trimTrailingWhitespaces;
+                var lineAdded;
+                if (rule) {
+                    applyRuleEdits(rule, previousItem, previousStartLine, currentItem, currentStartLine);
+                    if (rule.Operation.Action & (2 /* Space */ | 8 /* Delete */) && currentStartLine !== previousStartLine) {
+                        lineAdded = false;
+                        // Handle the case where the next line is moved to be the end of this line.
+                        // In this case we don't indent the next line in the next pass.
+                        if (currentParent.getStart(sourceFile) === currentItem.pos) {
+                            dynamicIndentation.recomputeIndentation(/*lineAddedByFormatting*/ false);
                         }
                     }
+                    else if (rule.Operation.Action & 4 /* NewLine */ && currentStartLine === previousStartLine) {
+                        lineAdded = true;
+                        // Handle the case where token2 is moved to the new line.
+                        // In this case we indent token2 in the next pass but we set
+                        // sameLineIndent flag to notify the indenter that the indentation is within the line.
+                        if (currentParent.getStart(sourceFile) === currentItem.pos) {
+                            dynamicIndentation.recomputeIndentation(/*lineAddedByFormatting*/ true);
+                        }
+                    }
+                    // We need to trim trailing whitespace between the tokens if they were on different lines, and no rule was applied to put them on the same line
+                    trimTrailingWhitespaces = !(rule.Operation.Action & 8 /* Delete */) && rule.Flag !== 1 /* CanDeleteNewLines */;
                 }
-                TokenRangeAccess.prototype.GetTokens = function () {
-                    return this.tokens;
-                };
-                TokenRangeAccess.prototype.Contains = function (token) {
-                    return this.tokens.indexOf(token) >= 0;
-                };
-                return TokenRangeAccess;
-            }());
-            Shared.TokenRangeAccess = TokenRangeAccess;
-            var TokenValuesAccess = (function () {
-                function TokenValuesAccess(tks) {
-                    this.tokens = tks && tks.length ? tks : [];
+                else {
+                    trimTrailingWhitespaces = true;
                 }
-                TokenValuesAccess.prototype.GetTokens = function () {
-                    return this.tokens;
-                };
-                TokenValuesAccess.prototype.Contains = function (token) {
-                    return this.tokens.indexOf(token) >= 0;
-                };
-                return TokenValuesAccess;
-            }());
-            Shared.TokenValuesAccess = TokenValuesAccess;
-            var TokenSingleValueAccess = (function () {
-                function TokenSingleValueAccess(token) {
-                    this.token = token;
+                if (currentStartLine !== previousStartLine && trimTrailingWhitespaces) {
+                    // We need to trim trailing whitespace between the tokens if they were on different lines, and no rule was applied to put them on the same line
+                    trimTrailingWhitespacesForLines(previousStartLine, currentStartLine, previousItem);
                 }
-                TokenSingleValueAccess.prototype.GetTokens = function () {
-                    return [this.token];
-                };
-                TokenSingleValueAccess.prototype.Contains = function (tokenValue) {
-                    return tokenValue === this.token;
-                };
-                return TokenSingleValueAccess;
-            }());
-            Shared.TokenSingleValueAccess = TokenSingleValueAccess;
-            var TokenAllAccess = (function () {
-                function TokenAllAccess() {
+                return lineAdded;
+            }
+            function insertIndentation(pos, indentation, lineAdded) {
+                var indentationString = getIndentationString(indentation, options);
+                if (lineAdded) {
+                    // new line is added before the token by the formatting rules
+                    // insert indentation string at the very beginning of the token
+                    recordReplace(pos, 0, indentationString);
                 }
-                TokenAllAccess.prototype.GetTokens = function () {
-                    var result = [];
-                    for (var token = 0 /* FirstToken */; token <= 138 /* LastToken */; token++) {
-                        result.push(token);
+                else {
+                    var tokenStart = sourceFile.getLineAndCharacterOfPosition(pos);
+                    var startLinePosition = ts.getStartPositionOfLine(tokenStart.line, sourceFile);
+                    if (indentation !== characterToColumn(startLinePosition, tokenStart.character) || indentationIsDifferent(indentationString, startLinePosition)) {
+                        recordReplace(startLinePosition, tokenStart.character, indentationString);
                     }
-                    return result;
-                };
-                TokenAllAccess.prototype.Contains = function (tokenValue) {
-                    return true;
-                };
-                TokenAllAccess.prototype.toString = function () {
-                    return "[allTokens]";
-                };
-                return TokenAllAccess;
-            }());
-            Shared.TokenAllAccess = TokenAllAccess;
-            var TokenRange = (function () {
-                function TokenRange(tokenAccess) {
-                    this.tokenAccess = tokenAccess;
                 }
-                TokenRange.FromToken = function (token) {
-                    return new TokenRange(new TokenSingleValueAccess(token));
-                };
-                TokenRange.FromTokens = function (tokens) {
-                    return new TokenRange(new TokenValuesAccess(tokens));
-                };
-                TokenRange.FromRange = function (f, to, except) {
-                    if (except === void 0) { except = []; }
-                    return new TokenRange(new TokenRangeAccess(f, to, except));
-                };
-                TokenRange.AllTokens = function () {
-                    return new TokenRange(new TokenAllAccess());
-                };
-                TokenRange.prototype.GetTokens = function () {
-                    return this.tokenAccess.GetTokens();
-                };
-                TokenRange.prototype.Contains = function (token) {
-                    return this.tokenAccess.Contains(token);
-                };
-                TokenRange.prototype.toString = function () {
-                    return this.tokenAccess.toString();
-                };
-                return TokenRange;
-            }());
-            TokenRange.Any = TokenRange.AllTokens();
-            TokenRange.AnyIncludingMultilineComments = TokenRange.FromTokens(TokenRange.Any.GetTokens().concat([3 /* MultiLineCommentTrivia */]));
-            TokenRange.Keywords = TokenRange.FromRange(70 /* FirstKeyword */, 138 /* LastKeyword */);
-            TokenRange.BinaryOperators = TokenRange.FromRange(25 /* FirstBinaryOperator */, 68 /* LastBinaryOperator */);
-            TokenRange.BinaryKeywordOperators = TokenRange.FromTokens([90 /* InKeyword */, 91 /* InstanceOfKeyword */, 138 /* OfKeyword */, 116 /* AsKeyword */, 124 /* IsKeyword */]);
-            TokenRange.UnaryPrefixOperators = TokenRange.FromTokens([41 /* PlusPlusToken */, 42 /* MinusMinusToken */, 50 /* TildeToken */, 49 /* ExclamationToken */]);
-            TokenRange.UnaryPrefixExpressions = TokenRange.FromTokens([8 /* NumericLiteral */, 69 /* Identifier */, 17 /* OpenParenToken */, 19 /* OpenBracketToken */, 15 /* OpenBraceToken */, 97 /* ThisKeyword */, 92 /* NewKeyword */]);
-            TokenRange.UnaryPreincrementExpressions = TokenRange.FromTokens([69 /* Identifier */, 17 /* OpenParenToken */, 97 /* ThisKeyword */, 92 /* NewKeyword */]);
-            TokenRange.UnaryPostincrementExpressions = TokenRange.FromTokens([69 /* Identifier */, 18 /* CloseParenToken */, 20 /* CloseBracketToken */, 92 /* NewKeyword */]);
-            TokenRange.UnaryPredecrementExpressions = TokenRange.FromTokens([69 /* Identifier */, 17 /* OpenParenToken */, 97 /* ThisKeyword */, 92 /* NewKeyword */]);
-            TokenRange.UnaryPostdecrementExpressions = TokenRange.FromTokens([69 /* Identifier */, 18 /* CloseParenToken */, 20 /* CloseBracketToken */, 92 /* NewKeyword */]);
-            TokenRange.Comments = TokenRange.FromTokens([2 /* SingleLineCommentTrivia */, 3 /* MultiLineCommentTrivia */]);
-            TokenRange.TypeNames = TokenRange.FromTokens([69 /* Identifier */, 130 /* NumberKeyword */, 132 /* StringKeyword */, 120 /* BooleanKeyword */, 133 /* SymbolKeyword */, 103 /* VoidKeyword */, 117 /* AnyKeyword */]);
-            Shared.TokenRange = TokenRange;
-        })(Shared = formatting.Shared || (formatting.Shared = {}));
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-///<reference path='..\services.ts' />
-///<reference path='formattingContext.ts' />
-///<reference path='formattingRequestKind.ts' />
-///<reference path='rule.ts' />
-///<reference path='ruleAction.ts' />
-///<reference path='ruleDescriptor.ts' />
-///<reference path='ruleFlag.ts' />
-///<reference path='ruleOperation.ts' />
-///<reference path='ruleOperationContext.ts' />
-///<reference path='rules.ts' />
-///<reference path='rulesMap.ts' />
-///<reference path='tokenRange.ts' /> 
-/// <reference path="references.ts"/>
-/* @internal */
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var RulesProvider = (function () {
-            function RulesProvider() {
-                this.globalRules = new formatting.Rules();
             }
-            RulesProvider.prototype.getRuleName = function (rule) {
-                return this.globalRules.getRuleName(rule);
-            };
-            RulesProvider.prototype.getRuleByName = function (name) {
-                return this.globalRules[name];
-            };
-            RulesProvider.prototype.getRulesMap = function () {
-                return this.rulesMap;
-            };
-            RulesProvider.prototype.ensureUpToDate = function (options) {
-                if (!this.options || !ts.compareDataObjects(this.options, options)) {
-                    var activeRules = this.createActiveRules(options);
-                    var rulesMap = formatting.RulesMap.create(activeRules);
-                    this.activeRules = activeRules;
-                    this.rulesMap = rulesMap;
-                    this.options = ts.clone(options);
-                }
-            };
-            RulesProvider.prototype.createActiveRules = function (options) {
-                var rules = this.globalRules.HighPriorityCommonRules.slice(0);
-                if (options.insertSpaceAfterCommaDelimiter) {
-                    rules.push(this.globalRules.SpaceAfterComma);
-                }
-                else {
-                    rules.push(this.globalRules.NoSpaceAfterComma);
+            function characterToColumn(startLinePosition, characterInLine) {
+                var column = 0;
+                for (var i = 0; i < characterInLine; i++) {
+                    if (sourceFile.text.charCodeAt(startLinePosition + i) === 9 /* tab */) {
+                        column += options.tabSize - column % options.tabSize;
+                    }
+                    else {
+                        column++;
+                    }
                 }
-                if (options.insertSpaceAfterFunctionKeywordForAnonymousFunctions) {
-                    rules.push(this.globalRules.SpaceAfterAnonymousFunctionKeyword);
+                return column;
+            }
+            function indentationIsDifferent(indentationString, startLinePosition) {
+                return indentationString !== sourceFile.text.substr(startLinePosition, indentationString.length);
+            }
+            function indentMultilineComment(commentRange, indentation, firstLineIsIndented) {
+                // split comment in lines
+                var startLine = sourceFile.getLineAndCharacterOfPosition(commentRange.pos).line;
+                var endLine = sourceFile.getLineAndCharacterOfPosition(commentRange.end).line;
+                var parts;
+                if (startLine === endLine) {
+                    if (!firstLineIsIndented) {
+                        // treat as single line comment
+                        insertIndentation(commentRange.pos, indentation, /*lineAdded*/ false);
+                    }
+                    return;
                 }
                 else {
-                    rules.push(this.globalRules.NoSpaceAfterAnonymousFunctionKeyword);
+                    parts = [];
+                    var startPos = commentRange.pos;
+                    for (var line = startLine; line < endLine; line++) {
+                        var endOfLine = ts.getEndLinePosition(line, sourceFile);
+                        parts.push({ pos: startPos, end: endOfLine });
+                        startPos = ts.getStartPositionOfLine(line + 1, sourceFile);
+                    }
+                    parts.push({ pos: startPos, end: commentRange.end });
                 }
-                if (options.insertSpaceAfterKeywordsInControlFlowStatements) {
-                    rules.push(this.globalRules.SpaceAfterKeywordInControl);
+                var startLinePos = ts.getStartPositionOfLine(startLine, sourceFile);
+                var nonWhitespaceColumnInFirstPart = formatting.SmartIndenter.findFirstNonWhitespaceCharacterAndColumn(startLinePos, parts[0].pos, sourceFile, options);
+                if (indentation === nonWhitespaceColumnInFirstPart.column) {
+                    return;
                 }
-                else {
-                    rules.push(this.globalRules.NoSpaceAfterKeywordInControl);
+                var startIndex = 0;
+                if (firstLineIsIndented) {
+                    startIndex = 1;
+                    startLine++;
                 }
-                if (options.insertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis) {
-                    rules.push(this.globalRules.SpaceAfterOpenParen);
-                    rules.push(this.globalRules.SpaceBeforeCloseParen);
-                    rules.push(this.globalRules.NoSpaceBetweenParens);
+                // shift all parts on the delta size
+                var delta = indentation - nonWhitespaceColumnInFirstPart.column;
+                for (var i = startIndex; i < parts.length; i++, startLine++) {
+                    var startLinePos_1 = ts.getStartPositionOfLine(startLine, sourceFile);
+                    var nonWhitespaceCharacterAndColumn = i === 0
+                        ? nonWhitespaceColumnInFirstPart
+                        : formatting.SmartIndenter.findFirstNonWhitespaceCharacterAndColumn(parts[i].pos, parts[i].end, sourceFile, options);
+                    var newIndentation = nonWhitespaceCharacterAndColumn.column + delta;
+                    if (newIndentation > 0) {
+                        var indentationString = getIndentationString(newIndentation, options);
+                        recordReplace(startLinePos_1, nonWhitespaceCharacterAndColumn.character, indentationString);
+                    }
+                    else {
+                        recordDelete(startLinePos_1, nonWhitespaceCharacterAndColumn.character);
+                    }
                 }
-                else {
-                    rules.push(this.globalRules.NoSpaceAfterOpenParen);
-                    rules.push(this.globalRules.NoSpaceBeforeCloseParen);
-                    rules.push(this.globalRules.NoSpaceBetweenParens);
+            }
+            function trimTrailingWhitespacesForLines(line1, line2, range) {
+                for (var line = line1; line < line2; line++) {
+                    var lineStartPosition = ts.getStartPositionOfLine(line, sourceFile);
+                    var lineEndPosition = ts.getEndLinePosition(line, sourceFile);
+                    // do not trim whitespaces in comments or template expression
+                    if (range && (ts.isComment(range.kind) || ts.isStringOrRegularExpressionOrTemplateLiteral(range.kind)) && range.pos <= lineEndPosition && range.end > lineEndPosition) {
+                        continue;
+                    }
+                    var whitespaceStart = getTrailingWhitespaceStartPosition(lineStartPosition, lineEndPosition);
+                    if (whitespaceStart !== -1) {
+                        ts.Debug.assert(whitespaceStart === lineStartPosition || !ts.isWhiteSpaceSingleLine(sourceFile.text.charCodeAt(whitespaceStart - 1)));
+                        recordDelete(whitespaceStart, lineEndPosition + 1 - whitespaceStart);
+                    }
                 }
-                if (options.insertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets) {
-                    rules.push(this.globalRules.SpaceAfterOpenBracket);
-                    rules.push(this.globalRules.SpaceBeforeCloseBracket);
-                    rules.push(this.globalRules.NoSpaceBetweenBrackets);
+            }
+            /**
+             * @param start The position of the first character in range
+             * @param end The position of the last character in range
+             */
+            function getTrailingWhitespaceStartPosition(start, end) {
+                var pos = end;
+                while (pos >= start && ts.isWhiteSpaceSingleLine(sourceFile.text.charCodeAt(pos))) {
+                    pos--;
                 }
-                else {
-                    rules.push(this.globalRules.NoSpaceAfterOpenBracket);
-                    rules.push(this.globalRules.NoSpaceBeforeCloseBracket);
-                    rules.push(this.globalRules.NoSpaceBetweenBrackets);
+                if (pos !== end) {
+                    return pos + 1;
                 }
-                // The default value of InsertSpaceAfterOpeningAndBeforeClosingNonemptyBraces is true
-                // so if the option is undefined, we should treat it as true as well
-                if (options.insertSpaceAfterOpeningAndBeforeClosingNonemptyBraces !== false) {
-                    rules.push(this.globalRules.SpaceAfterOpenBrace);
-                    rules.push(this.globalRules.SpaceBeforeCloseBrace);
-                    rules.push(this.globalRules.NoSpaceBetweenEmptyBraceBrackets);
+                return -1;
+            }
+            /**
+             * Trimming will be done for lines after the previous range
+             */
+            function trimTrailingWhitespacesForRemainingRange() {
+                var startPosition = previousRange ? previousRange.end : originalRange.pos;
+                var startLine = sourceFile.getLineAndCharacterOfPosition(startPosition).line;
+                var endLine = sourceFile.getLineAndCharacterOfPosition(originalRange.end).line;
+                trimTrailingWhitespacesForLines(startLine, endLine + 1, previousRange);
+            }
+            function newTextChange(start, len, newText) {
+                return { span: ts.createTextSpan(start, len), newText: newText };
+            }
+            function recordDelete(start, len) {
+                if (len) {
+                    edits.push(newTextChange(start, len, ""));
                 }
-                else {
-                    rules.push(this.globalRules.NoSpaceAfterOpenBrace);
-                    rules.push(this.globalRules.NoSpaceBeforeCloseBrace);
-                    rules.push(this.globalRules.NoSpaceBetweenEmptyBraceBrackets);
+            }
+            function recordReplace(start, len, newText) {
+                if (len || newText) {
+                    edits.push(newTextChange(start, len, newText));
                 }
-                if (options.insertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces) {
-                    rules.push(this.globalRules.SpaceAfterTemplateHeadAndMiddle);
-                    rules.push(this.globalRules.SpaceBeforeTemplateMiddleAndTail);
+            }
+            function applyRuleEdits(rule, previousRange, previousStartLine, currentRange, currentStartLine) {
+                switch (rule.Operation.Action) {
+                    case 1 /* Ignore */:
+                        // no action required
+                        return;
+                    case 8 /* Delete */:
+                        if (previousRange.end !== currentRange.pos) {
+                            // delete characters starting from t1.end up to t2.pos exclusive
+                            recordDelete(previousRange.end, currentRange.pos - previousRange.end);
+                        }
+                        break;
+                    case 4 /* NewLine */:
+                        // exit early if we on different lines and rule cannot change number of newlines
+                        // if line1 and line2 are on subsequent lines then no edits are required - ok to exit
+                        // if line1 and line2 are separated with more than one newline - ok to exit since we cannot delete extra new lines
+                        if (rule.Flag !== 1 /* CanDeleteNewLines */ && previousStartLine !== currentStartLine) {
+                            return;
+                        }
+                        // edit should not be applied only if we have one line feed between elements
+                        var lineDelta = currentStartLine - previousStartLine;
+                        if (lineDelta !== 1) {
+                            recordReplace(previousRange.end, currentRange.pos - previousRange.end, options.newLineCharacter);
+                        }
+                        break;
+                    case 2 /* Space */:
+                        // exit early if we on different lines and rule cannot change number of newlines
+                        if (rule.Flag !== 1 /* CanDeleteNewLines */ && previousStartLine !== currentStartLine) {
+                            return;
+                        }
+                        var posDelta = currentRange.pos - previousRange.end;
+                        if (posDelta !== 1 || sourceFile.text.charCodeAt(previousRange.end) !== 32 /* space */) {
+                            recordReplace(previousRange.end, currentRange.pos - previousRange.end, " ");
+                        }
+                        break;
                 }
-                else {
-                    rules.push(this.globalRules.NoSpaceAfterTemplateHeadAndMiddle);
-                    rules.push(this.globalRules.NoSpaceBeforeTemplateMiddleAndTail);
+            }
+        }
+        function getOpenTokenForList(node, list) {
+            switch (node.kind) {
+                case 152 /* Constructor */:
+                case 228 /* FunctionDeclaration */:
+                case 186 /* FunctionExpression */:
+                case 151 /* MethodDeclaration */:
+                case 150 /* MethodSignature */:
+                case 187 /* ArrowFunction */:
+                    if (node.typeParameters === list) {
+                        return 27 /* LessThanToken */;
+                    }
+                    else if (node.parameters === list) {
+                        return 19 /* OpenParenToken */;
+                    }
+                    break;
+                case 181 /* CallExpression */:
+                case 182 /* NewExpression */:
+                    if (node.typeArguments === list) {
+                        return 27 /* LessThanToken */;
+                    }
+                    else if (node.arguments === list) {
+                        return 19 /* OpenParenToken */;
+                    }
+                    break;
+                case 159 /* TypeReference */:
+                    if (node.typeArguments === list) {
+                        return 27 /* LessThanToken */;
+                    }
+            }
+            return 0 /* Unknown */;
+        }
+        function getCloseTokenForOpenToken(kind) {
+            switch (kind) {
+                case 19 /* OpenParenToken */:
+                    return 20 /* CloseParenToken */;
+                case 27 /* LessThanToken */:
+                    return 29 /* GreaterThanToken */;
+            }
+            return 0 /* Unknown */;
+        }
+        var internedSizes;
+        var internedTabsIndentation;
+        var internedSpacesIndentation;
+        function getIndentationString(indentation, options) {
+            // reset interned strings if FormatCodeOptions were changed
+            var resetInternedStrings = !internedSizes || (internedSizes.tabSize !== options.tabSize || internedSizes.indentSize !== options.indentSize);
+            if (resetInternedStrings) {
+                internedSizes = { tabSize: options.tabSize, indentSize: options.indentSize };
+                internedTabsIndentation = internedSpacesIndentation = undefined;
+            }
+            if (!options.convertTabsToSpaces) {
+                var tabs = Math.floor(indentation / options.tabSize);
+                var spaces = indentation - tabs * options.tabSize;
+                var tabString = void 0;
+                if (!internedTabsIndentation) {
+                    internedTabsIndentation = [];
                 }
-                if (options.insertSpaceAfterOpeningAndBeforeClosingJsxExpressionBraces) {
-                    rules.push(this.globalRules.SpaceAfterOpenBraceInJsxExpression);
-                    rules.push(this.globalRules.SpaceBeforeCloseBraceInJsxExpression);
+                if (internedTabsIndentation[tabs] === undefined) {
+                    internedTabsIndentation[tabs] = tabString = repeat("\t", tabs);
                 }
                 else {
-                    rules.push(this.globalRules.NoSpaceAfterOpenBraceInJsxExpression);
-                    rules.push(this.globalRules.NoSpaceBeforeCloseBraceInJsxExpression);
-                }
-                if (options.insertSpaceAfterSemicolonInForStatements) {
-                    rules.push(this.globalRules.SpaceAfterSemicolonInFor);
+                    tabString = internedTabsIndentation[tabs];
                 }
-                else {
-                    rules.push(this.globalRules.NoSpaceAfterSemicolonInFor);
+                return spaces ? tabString + repeat(" ", spaces) : tabString;
+            }
+            else {
+                var spacesString = void 0;
+                var quotient = Math.floor(indentation / options.indentSize);
+                var remainder = indentation % options.indentSize;
+                if (!internedSpacesIndentation) {
+                    internedSpacesIndentation = [];
                 }
-                if (options.insertSpaceBeforeAndAfterBinaryOperators) {
-                    rules.push(this.globalRules.SpaceBeforeBinaryOperator);
-                    rules.push(this.globalRules.SpaceAfterBinaryOperator);
+                if (internedSpacesIndentation[quotient] === undefined) {
+                    spacesString = repeat(" ", options.indentSize * quotient);
+                    internedSpacesIndentation[quotient] = spacesString;
                 }
                 else {
-                    rules.push(this.globalRules.NoSpaceBeforeBinaryOperator);
-                    rules.push(this.globalRules.NoSpaceAfterBinaryOperator);
-                }
-                if (options.placeOpenBraceOnNewLineForControlBlocks) {
-                    rules.push(this.globalRules.NewLineBeforeOpenBraceInControl);
-                }
-                if (options.placeOpenBraceOnNewLineForFunctions) {
-                    rules.push(this.globalRules.NewLineBeforeOpenBraceInFunction);
-                    rules.push(this.globalRules.NewLineBeforeOpenBraceInTypeScriptDeclWithBlock);
-                }
-                if (options.insertSpaceAfterTypeAssertion) {
-                    rules.push(this.globalRules.SpaceAfterTypeAssertion);
+                    spacesString = internedSpacesIndentation[quotient];
                 }
-                else {
-                    rules.push(this.globalRules.NoSpaceAfterTypeAssertion);
+                return remainder ? spacesString + repeat(" ", remainder) : spacesString;
+            }
+            function repeat(value, count) {
+                var s = "";
+                for (var i = 0; i < count; i++) {
+                    s += value;
                 }
-                rules = rules.concat(this.globalRules.LowPriorityCommonRules);
-                return rules;
-            };
-            return RulesProvider;
-        }());
-        formatting.RulesProvider = RulesProvider;
+                return s;
+            }
+        }
+        formatting.getIndentationString = getIndentationString;
     })(formatting = ts.formatting || (ts.formatting = {}));
 })(ts || (ts = {}));
 ///<reference path='..\services.ts' />
-///<reference path='formattingScanner.ts' />
-///<reference path='rulesProvider.ts' />
-///<reference path='references.ts' />
 /* @internal */
 var ts;
 (function (ts) {
     var formatting;
     (function (formatting) {
-        var Constants;
-        (function (Constants) {
-            Constants[Constants["Unknown"] = -1] = "Unknown";
-        })(Constants || (Constants = {}));
-        function formatOnEnter(position, sourceFile, rulesProvider, options) {
-            var line = sourceFile.getLineAndCharacterOfPosition(position).line;
-            if (line === 0) {
-                return [];
-            }
-            // After the enter key, the cursor is now at a new line. The new line may or may not contain non-whitespace characters.
-            // If the new line has only whitespaces, we won't want to format this line, because that would remove the indentation as
-            // trailing whitespaces. So the end of the formatting span should be the later one between:
-            //  1. the end of the previous line
-            //  2. the last non-whitespace character in the current line
-            var endOfFormatSpan = ts.getEndLinePosition(line, sourceFile);
-            while (ts.isWhiteSpaceSingleLine(sourceFile.text.charCodeAt(endOfFormatSpan))) {
-                endOfFormatSpan--;
-            }
-            // if the character at the end of the span is a line break, we shouldn't include it, because it indicates we don't want to
-            // touch the current line at all. Also, on some OSes the line break consists of two characters (\r\n), we should test if the
-            // previous character before the end of format span is line break character as well.
-            if (ts.isLineBreak(sourceFile.text.charCodeAt(endOfFormatSpan))) {
-                endOfFormatSpan--;
-            }
-            var span = {
-                // get start position for the previous line
-                pos: ts.getStartPositionOfLine(line - 1, sourceFile),
-                // end value is exclusive so add 1 to the result
-                end: endOfFormatSpan + 1
-            };
-            return formatSpan(span, sourceFile, options, rulesProvider, 2 /* FormatOnEnter */);
-        }
-        formatting.formatOnEnter = formatOnEnter;
-        function formatOnSemicolon(position, sourceFile, rulesProvider, options) {
-            return formatOutermostParent(position, 23 /* SemicolonToken */, sourceFile, options, rulesProvider, 3 /* FormatOnSemicolon */);
-        }
-        formatting.formatOnSemicolon = formatOnSemicolon;
-        function formatOnClosingCurly(position, sourceFile, rulesProvider, options) {
-            return formatOutermostParent(position, 16 /* CloseBraceToken */, sourceFile, options, rulesProvider, 4 /* FormatOnClosingCurlyBrace */);
-        }
-        formatting.formatOnClosingCurly = formatOnClosingCurly;
-        function formatDocument(sourceFile, rulesProvider, options) {
-            var span = {
-                pos: 0,
-                end: sourceFile.text.length
-            };
-            return formatSpan(span, sourceFile, options, rulesProvider, 0 /* FormatDocument */);
-        }
-        formatting.formatDocument = formatDocument;
-        function formatSelection(start, end, sourceFile, rulesProvider, options) {
-            // format from the beginning of the line
-            var span = {
-                pos: ts.getLineStartPositionForPosition(start, sourceFile),
-                end: end
-            };
-            return formatSpan(span, sourceFile, options, rulesProvider, 1 /* FormatSelection */);
-        }
-        formatting.formatSelection = formatSelection;
-        function formatOutermostParent(position, expectedLastToken, sourceFile, options, rulesProvider, requestKind) {
-            var parent = findOutermostParent(position, expectedLastToken, sourceFile);
-            if (!parent) {
-                return [];
-            }
-            var span = {
-                pos: ts.getLineStartPositionForPosition(parent.getStart(sourceFile), sourceFile),
-                end: parent.end
-            };
-            return formatSpan(span, sourceFile, options, rulesProvider, requestKind);
-        }
-        function findOutermostParent(position, expectedTokenKind, sourceFile) {
-            var precedingToken = ts.findPrecedingToken(position, sourceFile);
-            // when it is claimed that trigger character was typed at given position
-            // we verify that there is a token with a matching kind whose end is equal to position (because the character was just typed).
-            // If this condition is not hold - then trigger character was typed in some other context,
-            // i.e.in comment and thus should not trigger autoformatting
-            if (!precedingToken ||
-                precedingToken.kind !== expectedTokenKind ||
-                position !== precedingToken.getEnd()) {
-                return undefined;
-            }
-            // walk up and search for the parent node that ends at the same position with precedingToken.
-            // for cases like this
-            //
-            // let x = 1;
-            // while (true) {
-            // }
-            // after typing close curly in while statement we want to reformat just the while statement.
-            // However if we just walk upwards searching for the parent that has the same end value -
-            // we'll end up with the whole source file. isListElement allows to stop on the list element level
-            var current = precedingToken;
-            while (current &&
-                current.parent &&
-                current.parent.end === precedingToken.end &&
-                !isListElement(current.parent, current)) {
-                current = current.parent;
-            }
-            return current;
-        }
-        // Returns true if node is a element in some list in parent
-        // i.e. parent is class declaration with the list of members and node is one of members.
-        function isListElement(parent, node) {
-            switch (parent.kind) {
-                case 221 /* ClassDeclaration */:
-                case 222 /* InterfaceDeclaration */:
-                    return ts.rangeContainsRange(parent.members, node);
-                case 225 /* ModuleDeclaration */:
-                    var body = parent.body;
-                    return body && body.kind === 199 /* Block */ && ts.rangeContainsRange(body.statements, node);
-                case 256 /* SourceFile */:
-                case 199 /* Block */:
-                case 226 /* ModuleBlock */:
-                    return ts.rangeContainsRange(parent.statements, node);
-                case 252 /* CatchClause */:
-                    return ts.rangeContainsRange(parent.block.statements, node);
-            }
-            return false;
-        }
-        /** find node that fully contains given text range */
-        function findEnclosingNode(range, sourceFile) {
-            return find(sourceFile);
-            function find(n) {
-                var candidate = ts.forEachChild(n, function (c) { return ts.startEndContainsRange(c.getStart(sourceFile), c.end, range) && c; });
-                if (candidate) {
-                    var result = find(candidate);
-                    if (result) {
-                        return result;
+        var SmartIndenter;
+        (function (SmartIndenter) {
+            var Value;
+            (function (Value) {
+                Value[Value["Unknown"] = -1] = "Unknown";
+            })(Value || (Value = {}));
+            /**
+             * Computed indentation for a given position in source file
+             * @param position - position in file
+             * @param sourceFile - target source file
+             * @param options - set of editor options that control indentation
+             * @param assumeNewLineBeforeCloseBrace - false when getIndentation is called on the text from the real source file.
+             * true - when we need to assume that position is on the newline. This is usefult for codefixes, i.e.
+             * function f() {
+             * |}
+             * when inserting some text after open brace we would like to get the value of indentation as if newline was already there.
+             * However by default indentation at position | will be 0 so 'assumeNewLineBeforeCloseBrace' allows to override this behavior,
+             */
+            function getIndentation(position, sourceFile, options, assumeNewLineBeforeCloseBrace) {
+                if (assumeNewLineBeforeCloseBrace === void 0) { assumeNewLineBeforeCloseBrace = false; }
+                if (position > sourceFile.text.length) {
+                    return getBaseIndentation(options); // past EOF
+                }
+                // no indentation when the indent style is set to none,
+                // so we can return fast
+                if (options.indentStyle === ts.IndentStyle.None) {
+                    return 0;
+                }
+                var precedingToken = ts.findPrecedingToken(position, sourceFile);
+                if (!precedingToken) {
+                    return getBaseIndentation(options);
+                }
+                // no indentation in string \regex\template literals
+                var precedingTokenIsLiteral = ts.isStringOrRegularExpressionOrTemplateLiteral(precedingToken.kind);
+                if (precedingTokenIsLiteral && precedingToken.getStart(sourceFile) <= position && precedingToken.end > position) {
+                    return 0;
+                }
+                var lineAtPosition = sourceFile.getLineAndCharacterOfPosition(position).line;
+                // indentation is first non-whitespace character in a previous line
+                // for block indentation, we should look for a line which contains something that's not
+                // whitespace.
+                if (options.indentStyle === ts.IndentStyle.Block) {
+                    // move backwards until we find a line with a non-whitespace character,
+                    // then find the first non-whitespace character for that line.
+                    var current_1 = position;
+                    while (current_1 > 0) {
+                        var char = sourceFile.text.charCodeAt(current_1);
+                        if (!ts.isWhiteSpaceLike(char)) {
+                            break;
+                        }
+                        current_1--;
                     }
+                    var lineStart = ts.getLineStartPositionForPosition(current_1, sourceFile);
+                    return SmartIndenter.findFirstNonWhitespaceColumn(lineStart, current_1, sourceFile, options);
                 }
-                return n;
+                if (precedingToken.kind === 26 /* CommaToken */ && precedingToken.parent.kind !== 194 /* BinaryExpression */) {
+                    // previous token is comma that separates items in list - find the previous item and try to derive indentation from it
+                    var actualIndentation = getActualIndentationForListItemBeforeComma(precedingToken, sourceFile, options);
+                    if (actualIndentation !== -1 /* Unknown */) {
+                        return actualIndentation;
+                    }
+                }
+                // try to find node that can contribute to indentation and includes 'position' starting from 'precedingToken'
+                // if such node is found - compute initial indentation for 'position' inside this node
+                var previous;
+                var current = precedingToken;
+                var currentStart;
+                var indentationDelta;
+                while (current) {
+                    if (ts.positionBelongsToNode(current, position, sourceFile) && shouldIndentChildNode(current, previous)) {
+                        currentStart = getStartLineAndCharacterForNode(current, sourceFile);
+                        var nextTokenKind = nextTokenIsCurlyBraceOnSameLineAsCursor(precedingToken, current, lineAtPosition, sourceFile);
+                        if (nextTokenKind !== 0 /* Unknown */) {
+                            // handle cases when codefix is about to be inserted before the close brace
+                            indentationDelta = assumeNewLineBeforeCloseBrace && nextTokenKind === 2 /* CloseBrace */ ? options.indentSize : 0;
+                        }
+                        else {
+                            indentationDelta = lineAtPosition !== currentStart.line ? options.indentSize : 0;
+                        }
+                        break;
+                    }
+                    // check if current node is a list item - if yes, take indentation from it
+                    var actualIndentation = getActualIndentationForListItem(current, sourceFile, options);
+                    if (actualIndentation !== -1 /* Unknown */) {
+                        return actualIndentation;
+                    }
+                    actualIndentation = getLineIndentationWhenExpressionIsInMultiLine(current, sourceFile, options);
+                    if (actualIndentation !== -1 /* Unknown */) {
+                        return actualIndentation + options.indentSize;
+                    }
+                    previous = current;
+                    current = current.parent;
+                }
+                if (!current) {
+                    // no parent was found - return the base indentation of the SourceFile
+                    return getBaseIndentation(options);
+                }
+                return getIndentationForNodeWorker(current, currentStart, /*ignoreActualIndentationRange*/ undefined, indentationDelta, sourceFile, options);
             }
-        }
-        /** formatting is not applied to ranges that contain parse errors.
-          * This function will return a predicate that for a given text range will tell
-          * if there are any parse errors that overlap with the range.
-          */
-        function prepareRangeContainsErrorFunction(errors, originalRange) {
-            if (!errors.length) {
-                return rangeHasNoErrors;
+            SmartIndenter.getIndentation = getIndentation;
+            function getIndentationForNode(n, ignoreActualIndentationRange, sourceFile, options) {
+                var start = sourceFile.getLineAndCharacterOfPosition(n.getStart(sourceFile));
+                return getIndentationForNodeWorker(n, start, ignoreActualIndentationRange, /*indentationDelta*/ 0, sourceFile, options);
             }
-            // pick only errors that fall in range
-            var sorted = errors
-                .filter(function (d) { return ts.rangeOverlapsWithStartEnd(originalRange, d.start, d.start + d.length); })
-                .sort(function (e1, e2) { return e1.start - e2.start; });
-            if (!sorted.length) {
-                return rangeHasNoErrors;
+            SmartIndenter.getIndentationForNode = getIndentationForNode;
+            function getBaseIndentation(options) {
+                return options.baseIndentSize || 0;
             }
-            var index = 0;
-            return function (r) {
-                // in current implementation sequence of arguments [r1, r2...] is monotonically increasing.
-                // 'index' tracks the index of the most recent error that was checked.
-                while (true) {
-                    if (index >= sorted.length) {
-                        // all errors in the range were already checked -> no error in specified range
-                        return false;
+            SmartIndenter.getBaseIndentation = getBaseIndentation;
+            function getIndentationForNodeWorker(current, currentStart, ignoreActualIndentationRange, indentationDelta, sourceFile, options) {
+                var parent = current.parent;
+                var parentStart;
+                // walk upwards and collect indentations for pairs of parent-child nodes
+                // indentation is not added if parent and child nodes start on the same line or if parent is IfStatement and child starts on the same line with 'else clause'
+                while (parent) {
+                    var useActualIndentation = true;
+                    if (ignoreActualIndentationRange) {
+                        var start = current.getStart(sourceFile);
+                        useActualIndentation = start < ignoreActualIndentationRange.pos || start > ignoreActualIndentationRange.end;
                     }
-                    var error = sorted[index];
-                    if (r.end <= error.start) {
-                        // specified range ends before the error refered by 'index' - no error in range
-                        return false;
+                    if (useActualIndentation) {
+                        // check if current node is a list item - if yes, take indentation from it
+                        var actualIndentation = getActualIndentationForListItem(current, sourceFile, options);
+                        if (actualIndentation !== -1 /* Unknown */) {
+                            return actualIndentation + indentationDelta;
+                        }
                     }
-                    if (ts.startEndOverlapsWithStartEnd(r.pos, r.end, error.start, error.start + error.length)) {
-                        // specified range overlaps with error range
-                        return true;
+                    parentStart = getParentStart(parent, current, sourceFile);
+                    var parentAndChildShareLine = parentStart.line === currentStart.line ||
+                        childStartsOnTheSameLineWithElseInIfStatement(parent, current, currentStart.line, sourceFile);
+                    if (useActualIndentation) {
+                        // try to fetch actual indentation for current node from source text
+                        var actualIndentation = getActualIndentationForNode(current, parent, currentStart, parentAndChildShareLine, sourceFile, options);
+                        if (actualIndentation !== -1 /* Unknown */) {
+                            return actualIndentation + indentationDelta;
+                        }
+                        actualIndentation = getLineIndentationWhenExpressionIsInMultiLine(current, sourceFile, options);
+                        if (actualIndentation !== -1 /* Unknown */) {
+                            return actualIndentation + indentationDelta;
+                        }
                     }
-                    index++;
+                    // increase indentation if parent node wants its content to be indented and parent and child nodes don't start on the same line
+                    if (shouldIndentChildNode(parent, current) && !parentAndChildShareLine) {
+                        indentationDelta += options.indentSize;
+                    }
+                    current = parent;
+                    currentStart = parentStart;
+                    parent = current.parent;
                 }
-            };
-            function rangeHasNoErrors(r) {
-                return false;
+                return indentationDelta + getBaseIndentation(options);
             }
-        }
-        /**
-          * Start of the original range might fall inside the comment - scanner will not yield appropriate results
-          * This function will look for token that is located before the start of target range
-          * and return its end as start position for the scanner.
-          */
-        function getScanStartPosition(enclosingNode, originalRange, sourceFile) {
-            var start = enclosingNode.getStart(sourceFile);
-            if (start === originalRange.pos && enclosingNode.end === originalRange.end) {
-                return start;
+            function getParentStart(parent, child, sourceFile) {
+                var containingList = getContainingList(child, sourceFile);
+                if (containingList) {
+                    return sourceFile.getLineAndCharacterOfPosition(containingList.pos);
+                }
+                return sourceFile.getLineAndCharacterOfPosition(parent.getStart(sourceFile));
             }
-            var precedingToken = ts.findPrecedingToken(originalRange.pos, sourceFile);
-            if (!precedingToken) {
-                // no preceding token found - start from the beginning of enclosing node
-                return enclosingNode.pos;
+            /*
+             * Function returns Value.Unknown if indentation cannot be determined
+             */
+            function getActualIndentationForListItemBeforeComma(commaToken, sourceFile, options) {
+                // previous token is comma that separates items in list - find the previous item and try to derive indentation from it
+                var commaItemInfo = ts.findListItemInfo(commaToken);
+                if (commaItemInfo && commaItemInfo.listItemIndex > 0) {
+                    return deriveActualIndentationFromList(commaItemInfo.list.getChildren(), commaItemInfo.listItemIndex - 1, sourceFile, options);
+                }
+                else {
+                    // handle broken code gracefully
+                    return -1 /* Unknown */;
+                }
             }
-            // preceding token ends after the start of original range (i.e when originalRange.pos falls in the middle of literal)
-            // start from the beginning of enclosingNode to handle the entire 'originalRange'
-            if (precedingToken.end >= originalRange.pos) {
-                return enclosingNode.pos;
+            /*
+             * Function returns Value.Unknown if actual indentation for node should not be used (i.e because node is nested expression)
+             */
+            function getActualIndentationForNode(current, parent, currentLineAndChar, parentAndChildShareLine, sourceFile, options) {
+                // actual indentation is used for statements\declarations if one of cases below is true:
+                // - parent is SourceFile - by default immediate children of SourceFile are not indented except when user indents them manually
+                // - parent and child are not on the same line
+                var useActualIndentation = (ts.isDeclaration(current) || ts.isStatementButNotDeclaration(current)) &&
+                    (parent.kind === 265 /* SourceFile */ || !parentAndChildShareLine);
+                if (!useActualIndentation) {
+                    return -1 /* Unknown */;
+                }
+                return findColumnForFirstNonWhitespaceCharacterInLine(currentLineAndChar, sourceFile, options);
             }
-            return precedingToken.end;
-        }
-        /*
-         * For cases like
-         * if (a ||
-         *     b ||$
-         *     c) {...}
-         * If we hit Enter at $ we want line '    b ||' to be indented.
-         * Formatting will be applied to the last two lines.
-         * Node that fully encloses these lines is binary expression 'a ||...'.
-         * Initial indentation for this node will be 0.
-         * Binary expressions don't introduce new indentation scopes, however it is possible
-         * that some parent node on the same line does - like if statement in this case.
-         * Note that we are considering parents only from the same line with initial node -
-         * if parent is on the different line - its delta was already contributed
-         * to the initial indentation.
-         */
-        function getOwnOrInheritedDelta(n, options, sourceFile) {
-            var previousLine = -1 /* Unknown */;
-            var child;
-            while (n) {
-                var line = sourceFile.getLineAndCharacterOfPosition(n.getStart(sourceFile)).line;
-                if (previousLine !== -1 /* Unknown */ && line !== previousLine) {
-                    break;
+            var NextTokenKind;
+            (function (NextTokenKind) {
+                NextTokenKind[NextTokenKind["Unknown"] = 0] = "Unknown";
+                NextTokenKind[NextTokenKind["OpenBrace"] = 1] = "OpenBrace";
+                NextTokenKind[NextTokenKind["CloseBrace"] = 2] = "CloseBrace";
+            })(NextTokenKind || (NextTokenKind = {}));
+            function nextTokenIsCurlyBraceOnSameLineAsCursor(precedingToken, current, lineAtPosition, sourceFile) {
+                var nextToken = ts.findNextToken(precedingToken, current);
+                if (!nextToken) {
+                    return 0 /* Unknown */;
                 }
-                if (formatting.SmartIndenter.shouldIndentChildNode(n, child)) {
-                    return options.indentSize;
+                if (nextToken.kind === 17 /* OpenBraceToken */) {
+                    // open braces are always indented at the parent level
+                    return 1 /* OpenBrace */;
                 }
-                previousLine = line;
-                child = n;
-                n = n.parent;
+                else if (nextToken.kind === 18 /* CloseBraceToken */) {
+                    // close braces are indented at the parent level if they are located on the same line with cursor
+                    // this means that if new line will be added at $ position, this case will be indented
+                    // class A {
+                    //    $
+                    // }
+                    /// and this one - not
+                    // class A {
+                    // $}
+                    var nextTokenStartLine = getStartLineAndCharacterForNode(nextToken, sourceFile).line;
+                    return lineAtPosition === nextTokenStartLine ? 2 /* CloseBrace */ : 0 /* Unknown */;
+                }
+                return 0 /* Unknown */;
             }
-            return 0;
-        }
-        function formatSpan(originalRange, sourceFile, options, rulesProvider, requestKind) {
-            var rangeContainsError = prepareRangeContainsErrorFunction(sourceFile.parseDiagnostics, originalRange);
-            // formatting context is used by rules provider
-            var formattingContext = new formatting.FormattingContext(sourceFile, requestKind);
-            // find the smallest node that fully wraps the range and compute the initial indentation for the node
-            var enclosingNode = findEnclosingNode(originalRange, sourceFile);
-            var formattingScanner = formatting.getFormattingScanner(sourceFile, getScanStartPosition(enclosingNode, originalRange, sourceFile), originalRange.end);
-            var initialIndentation = formatting.SmartIndenter.getIndentationForNode(enclosingNode, originalRange, sourceFile, options);
-            var previousRangeHasError;
-            var previousRange;
-            var previousParent;
-            var previousRangeStartLine;
-            var lastIndentedLine;
-            var indentationOnLastIndentedLine;
-            var edits = [];
-            formattingScanner.advance();
-            if (formattingScanner.isOnToken()) {
-                var startLine = sourceFile.getLineAndCharacterOfPosition(enclosingNode.getStart(sourceFile)).line;
-                var undecoratedStartLine = startLine;
-                if (enclosingNode.decorators) {
-                    undecoratedStartLine = sourceFile.getLineAndCharacterOfPosition(ts.getNonDecoratorTokenPosOfNode(enclosingNode, sourceFile)).line;
+            function getStartLineAndCharacterForNode(n, sourceFile) {
+                return sourceFile.getLineAndCharacterOfPosition(n.getStart(sourceFile));
+            }
+            function childStartsOnTheSameLineWithElseInIfStatement(parent, child, childStartLine, sourceFile) {
+                if (parent.kind === 211 /* IfStatement */ && parent.elseStatement === child) {
+                    var elseKeyword = ts.findChildOfKind(parent, 82 /* ElseKeyword */, sourceFile);
+                    ts.Debug.assert(elseKeyword !== undefined);
+                    var elseKeywordStartLine = getStartLineAndCharacterForNode(elseKeyword, sourceFile).line;
+                    return elseKeywordStartLine === childStartLine;
+                }
+                return false;
+            }
+            SmartIndenter.childStartsOnTheSameLineWithElseInIfStatement = childStartsOnTheSameLineWithElseInIfStatement;
+            function getListIfStartEndIsInListRange(list, start, end) {
+                return list && ts.rangeContainsStartEnd(list, start, end) ? list : undefined;
+            }
+            function getContainingList(node, sourceFile) {
+                if (node.parent) {
+                    switch (node.parent.kind) {
+                        case 159 /* TypeReference */:
+                            return getListIfStartEndIsInListRange(node.parent.typeArguments, node.getStart(sourceFile), node.getEnd());
+                        case 178 /* ObjectLiteralExpression */:
+                            return node.parent.properties;
+                        case 177 /* ArrayLiteralExpression */:
+                            return node.parent.elements;
+                        case 228 /* FunctionDeclaration */:
+                        case 186 /* FunctionExpression */:
+                        case 187 /* ArrowFunction */:
+                        case 151 /* MethodDeclaration */:
+                        case 150 /* MethodSignature */:
+                        case 155 /* CallSignature */:
+                        case 152 /* Constructor */:
+                        case 161 /* ConstructorType */:
+                        case 156 /* ConstructSignature */: {
+                            var start = node.getStart(sourceFile);
+                            return getListIfStartEndIsInListRange(node.parent.typeParameters, start, node.getEnd()) ||
+                                getListIfStartEndIsInListRange(node.parent.parameters, start, node.getEnd());
+                        }
+                        case 229 /* ClassDeclaration */:
+                            return getListIfStartEndIsInListRange(node.parent.typeParameters, node.getStart(sourceFile), node.getEnd());
+                        case 182 /* NewExpression */:
+                        case 181 /* CallExpression */: {
+                            var start = node.getStart(sourceFile);
+                            return getListIfStartEndIsInListRange(node.parent.typeArguments, start, node.getEnd()) ||
+                                getListIfStartEndIsInListRange(node.parent.arguments, start, node.getEnd());
+                        }
+                        case 227 /* VariableDeclarationList */:
+                            return getListIfStartEndIsInListRange(node.parent.declarations, node.getStart(sourceFile), node.getEnd());
+                        case 241 /* NamedImports */:
+                        case 245 /* NamedExports */:
+                            return getListIfStartEndIsInListRange(node.parent.elements, node.getStart(sourceFile), node.getEnd());
+                    }
                 }
-                var delta = getOwnOrInheritedDelta(enclosingNode, options, sourceFile);
-                processNode(enclosingNode, enclosingNode, startLine, undecoratedStartLine, initialIndentation, delta);
+                return undefined;
             }
-            if (!formattingScanner.isOnToken()) {
-                var leadingTrivia = formattingScanner.getCurrentLeadingTrivia();
-                if (leadingTrivia) {
-                    processTrivia(leadingTrivia, enclosingNode, enclosingNode, undefined);
-                    trimTrailingWhitespacesForRemainingRange();
+            SmartIndenter.getContainingList = getContainingList;
+            function getActualIndentationForListItem(node, sourceFile, options) {
+                var containingList = getContainingList(node, sourceFile);
+                return containingList ? getActualIndentationFromList(containingList) : -1 /* Unknown */;
+                function getActualIndentationFromList(list) {
+                    var index = ts.indexOf(list, node);
+                    return index !== -1 ? deriveActualIndentationFromList(list, index, sourceFile, options) : -1 /* Unknown */;
                 }
             }
-            formattingScanner.close();
-            return edits;
-            // local functions
-            /** Tries to compute the indentation for a list element.
-              * If list element is not in range then
-              * function will pick its actual indentation
-              * so it can be pushed downstream as inherited indentation.
-              * If list element is in the range - its indentation will be equal
-              * to inherited indentation from its predecessors.
-              */
-            function tryComputeIndentationForListItem(startPos, endPos, parentStartLine, range, inheritedIndentation) {
-                if (ts.rangeOverlapsWithStartEnd(range, startPos, endPos) ||
-                    ts.rangeContainsStartEnd(range, startPos, endPos) /* Not to miss zero-range nodes e.g. JsxText */) {
-                    if (inheritedIndentation !== -1 /* Unknown */) {
-                        return inheritedIndentation;
-                    }
+            function getLineIndentationWhenExpressionIsInMultiLine(node, sourceFile, options) {
+                // actual indentation should not be used when:
+                // - node is close parenthesis - this is the end of the expression
+                if (node.kind === 20 /* CloseParenToken */) {
+                    return -1 /* Unknown */;
                 }
-                else {
-                    var startLine = sourceFile.getLineAndCharacterOfPosition(startPos).line;
-                    var startLinePosition = ts.getLineStartPositionForPosition(startPos, sourceFile);
-                    var column = formatting.SmartIndenter.findFirstNonWhitespaceColumn(startLinePosition, startPos, sourceFile, options);
-                    if (startLine !== parentStartLine || startPos === column) {
-                        // Use the base indent size if it is greater than
-                        // the indentation of the inherited predecessor.
-                        var baseIndentSize = formatting.SmartIndenter.getBaseIndentation(options);
-                        return baseIndentSize > column ? baseIndentSize : column;
+                if (node.parent && ts.isCallOrNewExpression(node.parent) && node.parent.expression !== node) {
+                    var fullCallOrNewExpression = node.parent.expression;
+                    var startingExpression = getStartingExpression(fullCallOrNewExpression);
+                    if (fullCallOrNewExpression === startingExpression) {
+                        return -1 /* Unknown */;
+                    }
+                    var fullCallOrNewExpressionEnd = sourceFile.getLineAndCharacterOfPosition(fullCallOrNewExpression.end);
+                    var startingExpressionEnd = sourceFile.getLineAndCharacterOfPosition(startingExpression.end);
+                    if (fullCallOrNewExpressionEnd.line === startingExpressionEnd.line) {
+                        return -1 /* Unknown */;
                     }
+                    return findColumnForFirstNonWhitespaceCharacterInLine(fullCallOrNewExpressionEnd, sourceFile, options);
                 }
                 return -1 /* Unknown */;
+                function getStartingExpression(node) {
+                    while (true) {
+                        switch (node.kind) {
+                            case 181 /* CallExpression */:
+                            case 182 /* NewExpression */:
+                            case 179 /* PropertyAccessExpression */:
+                            case 180 /* ElementAccessExpression */:
+                                node = node.expression;
+                                break;
+                            default:
+                                return node;
+                        }
+                    }
+                }
             }
-            function computeIndentation(node, startLine, inheritedIndentation, parent, parentDynamicIndentation, effectiveParentStartLine) {
-                var indentation = inheritedIndentation;
-                var delta = formatting.SmartIndenter.shouldIndentChildNode(node) ? options.indentSize : 0;
-                if (effectiveParentStartLine === startLine) {
-                    // if node is located on the same line with the parent
-                    // - inherit indentation from the parent
-                    // - push children if either parent of node itself has non-zero delta
-                    indentation = startLine === lastIndentedLine
-                        ? indentationOnLastIndentedLine
-                        : parentDynamicIndentation.getIndentation();
-                    delta = Math.min(options.indentSize, parentDynamicIndentation.getDelta(node) + delta);
+            function deriveActualIndentationFromList(list, index, sourceFile, options) {
+                ts.Debug.assert(index >= 0 && index < list.length);
+                var node = list[index];
+                // walk toward the start of the list starting from current node and check if the line is the same for all items.
+                // if end line for item [i - 1] differs from the start line for item [i] - find column of the first non-whitespace character on the line of item [i]
+                var lineAndCharacter = getStartLineAndCharacterForNode(node, sourceFile);
+                for (var i = index - 1; i >= 0; i--) {
+                    if (list[i].kind === 26 /* CommaToken */) {
+                        continue;
+                    }
+                    // skip list items that ends on the same line with the current list element
+                    var prevEndLine = sourceFile.getLineAndCharacterOfPosition(list[i].end).line;
+                    if (prevEndLine !== lineAndCharacter.line) {
+                        return findColumnForFirstNonWhitespaceCharacterInLine(lineAndCharacter, sourceFile, options);
+                    }
+                    lineAndCharacter = getStartLineAndCharacterForNode(list[i], sourceFile);
                 }
-                else if (indentation === -1 /* Unknown */) {
-                    if (formatting.SmartIndenter.childStartsOnTheSameLineWithElseInIfStatement(parent, node, startLine, sourceFile)) {
-                        indentation = parentDynamicIndentation.getIndentation();
+                return -1 /* Unknown */;
+            }
+            function findColumnForFirstNonWhitespaceCharacterInLine(lineAndCharacter, sourceFile, options) {
+                var lineStart = sourceFile.getPositionOfLineAndCharacter(lineAndCharacter.line, 0);
+                return findFirstNonWhitespaceColumn(lineStart, lineStart + lineAndCharacter.character, sourceFile, options);
+            }
+            /*
+                Character is the actual index of the character since the beginning of the line.
+                Column - position of the character after expanding tabs to spaces
+                "0\t2$"
+                value of 'character' for '$' is 3
+                value of 'column' for '$' is 6 (assuming that tab size is 4)
+            */
+            function findFirstNonWhitespaceCharacterAndColumn(startPos, endPos, sourceFile, options) {
+                var character = 0;
+                var column = 0;
+                for (var pos = startPos; pos < endPos; pos++) {
+                    var ch = sourceFile.text.charCodeAt(pos);
+                    if (!ts.isWhiteSpaceSingleLine(ch)) {
+                        break;
+                    }
+                    if (ch === 9 /* tab */) {
+                        column += options.tabSize + (column % options.tabSize);
                     }
                     else {
-                        indentation = parentDynamicIndentation.getIndentation() + parentDynamicIndentation.getDelta(node);
+                        column++;
                     }
+                    character++;
                 }
-                return {
-                    indentation: indentation,
-                    delta: delta
-                };
+                return { column: column, character: character };
             }
-            function getFirstNonDecoratorTokenOfNode(node) {
-                if (node.modifiers && node.modifiers.length) {
-                    return node.modifiers[0].kind;
+            SmartIndenter.findFirstNonWhitespaceCharacterAndColumn = findFirstNonWhitespaceCharacterAndColumn;
+            function findFirstNonWhitespaceColumn(startPos, endPos, sourceFile, options) {
+                return findFirstNonWhitespaceCharacterAndColumn(startPos, endPos, sourceFile, options).column;
+            }
+            SmartIndenter.findFirstNonWhitespaceColumn = findFirstNonWhitespaceColumn;
+            function nodeContentIsAlwaysIndented(kind) {
+                switch (kind) {
+                    case 210 /* ExpressionStatement */:
+                    case 229 /* ClassDeclaration */:
+                    case 199 /* ClassExpression */:
+                    case 230 /* InterfaceDeclaration */:
+                    case 232 /* EnumDeclaration */:
+                    case 231 /* TypeAliasDeclaration */:
+                    case 177 /* ArrayLiteralExpression */:
+                    case 207 /* Block */:
+                    case 234 /* ModuleBlock */:
+                    case 178 /* ObjectLiteralExpression */:
+                    case 163 /* TypeLiteral */:
+                    case 172 /* MappedType */:
+                    case 165 /* TupleType */:
+                    case 235 /* CaseBlock */:
+                    case 258 /* DefaultClause */:
+                    case 257 /* CaseClause */:
+                    case 185 /* ParenthesizedExpression */:
+                    case 179 /* PropertyAccessExpression */:
+                    case 181 /* CallExpression */:
+                    case 182 /* NewExpression */:
+                    case 208 /* VariableStatement */:
+                    case 226 /* VariableDeclaration */:
+                    case 243 /* ExportAssignment */:
+                    case 219 /* ReturnStatement */:
+                    case 195 /* ConditionalExpression */:
+                    case 175 /* ArrayBindingPattern */:
+                    case 174 /* ObjectBindingPattern */:
+                    case 251 /* JsxOpeningElement */:
+                    case 250 /* JsxSelfClosingElement */:
+                    case 256 /* JsxExpression */:
+                    case 150 /* MethodSignature */:
+                    case 155 /* CallSignature */:
+                    case 156 /* ConstructSignature */:
+                    case 146 /* Parameter */:
+                    case 160 /* FunctionType */:
+                    case 161 /* ConstructorType */:
+                    case 168 /* ParenthesizedType */:
+                    case 183 /* TaggedTemplateExpression */:
+                    case 191 /* AwaitExpression */:
+                    case 245 /* NamedExports */:
+                    case 241 /* NamedImports */:
+                    case 246 /* ExportSpecifier */:
+                    case 242 /* ImportSpecifier */:
+                        return true;
                 }
-                switch (node.kind) {
-                    case 221 /* ClassDeclaration */: return 73 /* ClassKeyword */;
-                    case 222 /* InterfaceDeclaration */: return 107 /* InterfaceKeyword */;
-                    case 220 /* FunctionDeclaration */: return 87 /* FunctionKeyword */;
-                    case 224 /* EnumDeclaration */: return 224 /* EnumDeclaration */;
-                    case 149 /* GetAccessor */: return 123 /* GetKeyword */;
-                    case 150 /* SetAccessor */: return 131 /* SetKeyword */;
-                    case 147 /* MethodDeclaration */:
-                        if (node.asteriskToken) {
-                            return 37 /* AsteriskToken */;
-                        } /*
-                    fall-through
-                    */
-                    case 145 /* PropertyDeclaration */:
-                    case 142 /* Parameter */:
-                        return node.name.kind;
+                return false;
+            }
+            /* @internal */
+            function nodeWillIndentChild(parent, child, indentByDefault) {
+                var childKind = child ? child.kind : 0 /* Unknown */;
+                switch (parent.kind) {
+                    case 212 /* DoStatement */:
+                    case 213 /* WhileStatement */:
+                    case 215 /* ForInStatement */:
+                    case 216 /* ForOfStatement */:
+                    case 214 /* ForStatement */:
+                    case 211 /* IfStatement */:
+                    case 228 /* FunctionDeclaration */:
+                    case 186 /* FunctionExpression */:
+                    case 151 /* MethodDeclaration */:
+                    case 187 /* ArrowFunction */:
+                    case 152 /* Constructor */:
+                    case 153 /* GetAccessor */:
+                    case 154 /* SetAccessor */:
+                        return childKind !== 207 /* Block */;
+                    case 244 /* ExportDeclaration */:
+                        return childKind !== 245 /* NamedExports */;
+                    case 238 /* ImportDeclaration */:
+                        return childKind !== 239 /* ImportClause */ ||
+                            (child.namedBindings && child.namedBindings.kind !== 241 /* NamedImports */);
+                    case 249 /* JsxElement */:
+                        return childKind !== 252 /* JsxClosingElement */;
                 }
+                // No explicit rule for given nodes so the result will follow the default value argument
+                return indentByDefault;
             }
-            function getDynamicIndentation(node, nodeStartLine, indentation, delta) {
-                return {
-                    getIndentationForComment: function (kind, tokenIndentation, container) {
-                        switch (kind) {
-                            // preceding comment to the token that closes the indentation scope inherits the indentation from the scope
-                            // ..  {
-                            //     // comment
-                            // }
-                            case 16 /* CloseBraceToken */:
-                            case 20 /* CloseBracketToken */:
-                            case 18 /* CloseParenToken */:
-                                return indentation + getEffectiveDelta(delta, container);
-                        }
-                        return tokenIndentation !== -1 /* Unknown */ ? tokenIndentation : indentation;
-                    },
-                    getIndentationForToken: function (line, kind, container) {
-                        if (nodeStartLine !== line && node.decorators) {
-                            if (kind === getFirstNonDecoratorTokenOfNode(node)) {
-                                // if this token is the first token following the list of decorators, we do not need to indent
-                                return indentation;
-                            }
-                        }
-                        switch (kind) {
-                            // open and close brace, 'else' and 'while' (in do statement) tokens has indentation of the parent
-                            case 15 /* OpenBraceToken */:
-                            case 16 /* CloseBraceToken */:
-                            case 19 /* OpenBracketToken */:
-                            case 20 /* CloseBracketToken */:
-                            case 17 /* OpenParenToken */:
-                            case 18 /* CloseParenToken */:
-                            case 80 /* ElseKeyword */:
-                            case 104 /* WhileKeyword */:
-                            case 55 /* AtToken */:
-                                return indentation;
-                            default:
-                                // if token line equals to the line of containing node (this is a first token in the node) - use node indentation
-                                return nodeStartLine !== line ? indentation + getEffectiveDelta(delta, container) : indentation;
-                        }
-                    },
-                    getIndentation: function () { return indentation; },
-                    getDelta: function (child) { return getEffectiveDelta(delta, child); },
-                    recomputeIndentation: function (lineAdded) {
-                        if (node.parent && formatting.SmartIndenter.shouldIndentChildNode(node.parent, node)) {
-                            if (lineAdded) {
-                                indentation += options.indentSize;
-                            }
-                            else {
-                                indentation -= options.indentSize;
-                            }
-                            if (formatting.SmartIndenter.shouldIndentChildNode(node)) {
-                                delta = options.indentSize;
-                            }
-                            else {
-                                delta = 0;
-                            }
-                        }
-                    }
-                };
-                function getEffectiveDelta(delta, child) {
-                    // Delta value should be zero when the node explicitly prevents indentation of the child node
-                    return formatting.SmartIndenter.nodeWillIndentChild(node, child, true) ? delta : 0;
+            SmartIndenter.nodeWillIndentChild = nodeWillIndentChild;
+            /*
+            Function returns true when the parent node should indent the given child by an explicit rule
+            */
+            function shouldIndentChildNode(parent, child) {
+                return nodeContentIsAlwaysIndented(parent.kind) || nodeWillIndentChild(parent, child, /*indentByDefault*/ false);
+            }
+            SmartIndenter.shouldIndentChildNode = shouldIndentChildNode;
+        })(SmartIndenter = formatting.SmartIndenter || (formatting.SmartIndenter = {}));
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+/* @internal */
+var ts;
+(function (ts) {
+    var textChanges;
+    (function (textChanges) {
+        /**
+         * Currently for simplicity we store recovered positions on the node itself.
+         * It can be changed to side-table later if we decide that current design is too invasive.
+         */
+        function getPos(n) {
+            return n["__pos"];
+        }
+        function setPos(n, pos) {
+            n["__pos"] = pos;
+        }
+        function getEnd(n) {
+            return n["__end"];
+        }
+        function setEnd(n, end) {
+            n["__end"] = end;
+        }
+        var Position;
+        (function (Position) {
+            Position[Position["FullStart"] = 0] = "FullStart";
+            Position[Position["Start"] = 1] = "Start";
+        })(Position = textChanges.Position || (textChanges.Position = {}));
+        function skipWhitespacesAndLineBreaks(text, start) {
+            return ts.skipTrivia(text, start, /*stopAfterLineBreak*/ false, /*stopAtComments*/ true);
+        }
+        function hasCommentsBeforeLineBreak(text, start) {
+            var i = start;
+            while (i < text.length) {
+                var ch = text.charCodeAt(i);
+                if (ts.isWhiteSpaceSingleLine(ch)) {
+                    i++;
+                    continue;
                 }
+                return ch === 47 /* slash */;
             }
-            function processNode(node, contextNode, nodeStartLine, undecoratedNodeStartLine, indentation, delta) {
-                if (!ts.rangeOverlapsWithStartEnd(originalRange, node.getStart(sourceFile), node.getEnd())) {
-                    return;
+            return false;
+        }
+        function getSeparatorCharacter(separator) {
+            return ts.tokenToString(separator.kind);
+        }
+        textChanges.getSeparatorCharacter = getSeparatorCharacter;
+        function getAdjustedStartPosition(sourceFile, node, options, position) {
+            if (options.useNonAdjustedStartPosition) {
+                return node.getFullStart();
+            }
+            var fullStart = node.getFullStart();
+            var start = node.getStart(sourceFile);
+            if (fullStart === start) {
+                return start;
+            }
+            var fullStartLine = ts.getLineStartPositionForPosition(fullStart, sourceFile);
+            var startLine = ts.getLineStartPositionForPosition(start, sourceFile);
+            if (startLine === fullStartLine) {
+                // full start and start of the node are on the same line
+                //   a,     b;
+                //    ^     ^
+                //    |   start
+                // fullstart
+                // when b is replaced - we usually want to keep the leading trvia
+                // when b is deleted - we delete it
+                return position === Position.Start ? start : fullStart;
+            }
+            // get start position of the line following the line that contains fullstart position
+            var adjustedStartPosition = ts.getStartPositionOfLine(ts.getLineOfLocalPosition(sourceFile, fullStartLine) + 1, sourceFile);
+            // skip whitespaces/newlines
+            adjustedStartPosition = skipWhitespacesAndLineBreaks(sourceFile.text, adjustedStartPosition);
+            return ts.getStartPositionOfLine(ts.getLineOfLocalPosition(sourceFile, adjustedStartPosition), sourceFile);
+        }
+        textChanges.getAdjustedStartPosition = getAdjustedStartPosition;
+        function getAdjustedEndPosition(sourceFile, node, options) {
+            if (options.useNonAdjustedEndPosition) {
+                return node.getEnd();
+            }
+            var end = node.getEnd();
+            var newEnd = ts.skipTrivia(sourceFile.text, end, /*stopAfterLineBreak*/ true);
+            // check if last character before newPos is linebreak
+            // if yes - considered all skipped trivia to be trailing trivia of the node
+            return newEnd !== end && ts.isLineBreak(sourceFile.text.charCodeAt(newEnd - 1))
+                ? newEnd
+                : end;
+        }
+        textChanges.getAdjustedEndPosition = getAdjustedEndPosition;
+        /**
+         * Checks if 'candidate' argument is a legal separator in the list that contains 'node' as an element
+         */
+        function isSeparator(node, candidate) {
+            return candidate && node.parent && (candidate.kind === 26 /* CommaToken */ || (candidate.kind === 25 /* SemicolonToken */ && node.parent.kind === 178 /* ObjectLiteralExpression */));
+        }
+        function spaces(count) {
+            var s = "";
+            for (var i = 0; i < count; i++) {
+                s += " ";
+            }
+            return s;
+        }
+        var ChangeTracker = (function () {
+            function ChangeTracker(newLine, rulesProvider, validator) {
+                this.newLine = newLine;
+                this.rulesProvider = rulesProvider;
+                this.validator = validator;
+                this.changes = [];
+                this.newLineCharacter = ts.getNewLineCharacter({ newLine: newLine });
+            }
+            ChangeTracker.fromCodeFixContext = function (context) {
+                return new ChangeTracker(context.newLineCharacter === "\n" ? 1 /* LineFeed */ : 0 /* CarriageReturnLineFeed */, context.rulesProvider);
+            };
+            ChangeTracker.prototype.deleteNode = function (sourceFile, node, options) {
+                if (options === void 0) { options = {}; }
+                var startPosition = getAdjustedStartPosition(sourceFile, node, options, Position.FullStart);
+                var endPosition = getAdjustedEndPosition(sourceFile, node, options);
+                this.changes.push({ sourceFile: sourceFile, options: options, range: { pos: startPosition, end: endPosition } });
+                return this;
+            };
+            ChangeTracker.prototype.deleteRange = function (sourceFile, range) {
+                this.changes.push({ sourceFile: sourceFile, range: range });
+                return this;
+            };
+            ChangeTracker.prototype.deleteNodeRange = function (sourceFile, startNode, endNode, options) {
+                if (options === void 0) { options = {}; }
+                var startPosition = getAdjustedStartPosition(sourceFile, startNode, options, Position.FullStart);
+                var endPosition = getAdjustedEndPosition(sourceFile, endNode, options);
+                this.changes.push({ sourceFile: sourceFile, options: options, range: { pos: startPosition, end: endPosition } });
+                return this;
+            };
+            ChangeTracker.prototype.deleteNodeInList = function (sourceFile, node) {
+                var containingList = ts.formatting.SmartIndenter.getContainingList(node, sourceFile);
+                if (!containingList) {
+                    ts.Debug.fail("node is not a list element");
+                    return this;
                 }
-                var nodeDynamicIndentation = getDynamicIndentation(node, nodeStartLine, indentation, delta);
-                // a useful observations when tracking context node
-                //        /
-                //      [a]
-                //   /   |   \
-                //  [b] [c] [d]
-                // node 'a' is a context node for nodes 'b', 'c', 'd'
-                // except for the leftmost leaf token in [b] - in this case context node ('e') is located somewhere above 'a'
-                // this rule can be applied recursively to child nodes of 'a'.
-                //
-                // context node is set to parent node value after processing every child node
-                // context node is set to parent of the token after processing every token
-                var childContextNode = contextNode;
-                // if there are any tokens that logically belong to node and interleave child nodes
-                // such tokens will be consumed in processChildNode for for the child that follows them
-                ts.forEachChild(node, function (child) {
-                    processChildNode(child, /*inheritedIndentation*/ -1 /* Unknown */, node, nodeDynamicIndentation, nodeStartLine, undecoratedNodeStartLine, /*isListItem*/ false);
-                }, function (nodes) {
-                    processChildNodes(nodes, node, nodeStartLine, nodeDynamicIndentation);
-                });
-                // proceed any tokens in the node that are located after child nodes
-                while (formattingScanner.isOnToken()) {
-                    var tokenInfo = formattingScanner.readTokenInfo(node);
-                    if (tokenInfo.token.end > node.end) {
-                        break;
+                var index = containingList.indexOf(node);
+                if (index < 0) {
+                    return this;
+                }
+                if (containingList.length === 1) {
+                    this.deleteNode(sourceFile, node);
+                    return this;
+                }
+                if (index !== containingList.length - 1) {
+                    var nextToken = ts.getTokenAtPosition(sourceFile, node.end, /*includeJsDocComment*/ false);
+                    if (nextToken && isSeparator(node, nextToken)) {
+                        // find first non-whitespace position in the leading trivia of the node
+                        var startPosition = ts.skipTrivia(sourceFile.text, getAdjustedStartPosition(sourceFile, node, {}, Position.FullStart), /*stopAfterLineBreak*/ false, /*stopAtComments*/ true);
+                        var nextElement = containingList[index + 1];
+                        /// find first non-whitespace position in the leading trivia of the next node
+                        var endPosition = ts.skipTrivia(sourceFile.text, getAdjustedStartPosition(sourceFile, nextElement, {}, Position.FullStart), /*stopAfterLineBreak*/ false, /*stopAtComments*/ true);
+                        // shift next node so its first non-whitespace position will be moved to the first non-whitespace position of the deleted node
+                        this.deleteRange(sourceFile, { pos: startPosition, end: endPosition });
                     }
-                    consumeTokenAndAdvanceScanner(tokenInfo, node, nodeDynamicIndentation);
                 }
-                function processChildNode(child, inheritedIndentation, parent, parentDynamicIndentation, parentStartLine, undecoratedParentStartLine, isListItem, isFirstListItem) {
-                    var childStartPos = child.getStart(sourceFile);
-                    var childStartLine = sourceFile.getLineAndCharacterOfPosition(childStartPos).line;
-                    var undecoratedChildStartLine = childStartLine;
-                    if (child.decorators) {
-                        undecoratedChildStartLine = sourceFile.getLineAndCharacterOfPosition(ts.getNonDecoratorTokenPosOfNode(child, sourceFile)).line;
+                else {
+                    var previousToken = ts.getTokenAtPosition(sourceFile, containingList[index - 1].end, /*includeJsDocComment*/ false);
+                    if (previousToken && isSeparator(node, previousToken)) {
+                        this.deleteNodeRange(sourceFile, previousToken, node);
                     }
-                    // if child is a list item - try to get its indentation
-                    var childIndentationAmount = -1 /* Unknown */;
-                    if (isListItem) {
-                        childIndentationAmount = tryComputeIndentationForListItem(childStartPos, child.end, parentStartLine, originalRange, inheritedIndentation);
-                        if (childIndentationAmount !== -1 /* Unknown */) {
-                            inheritedIndentation = childIndentationAmount;
-                        }
+                }
+                return this;
+            };
+            ChangeTracker.prototype.replaceRange = function (sourceFile, range, newNode, options) {
+                if (options === void 0) { options = {}; }
+                this.changes.push({ sourceFile: sourceFile, range: range, options: options, node: newNode });
+                return this;
+            };
+            ChangeTracker.prototype.replaceNode = function (sourceFile, oldNode, newNode, options) {
+                if (options === void 0) { options = {}; }
+                var startPosition = getAdjustedStartPosition(sourceFile, oldNode, options, Position.Start);
+                var endPosition = getAdjustedEndPosition(sourceFile, oldNode, options);
+                this.changes.push({ sourceFile: sourceFile, options: options, useIndentationFromFile: true, node: newNode, range: { pos: startPosition, end: endPosition } });
+                return this;
+            };
+            ChangeTracker.prototype.replaceNodeRange = function (sourceFile, startNode, endNode, newNode, options) {
+                if (options === void 0) { options = {}; }
+                var startPosition = getAdjustedStartPosition(sourceFile, startNode, options, Position.Start);
+                var endPosition = getAdjustedEndPosition(sourceFile, endNode, options);
+                this.changes.push({ sourceFile: sourceFile, options: options, useIndentationFromFile: true, node: newNode, range: { pos: startPosition, end: endPosition } });
+                return this;
+            };
+            ChangeTracker.prototype.insertNodeAt = function (sourceFile, pos, newNode, options) {
+                if (options === void 0) { options = {}; }
+                this.changes.push({ sourceFile: sourceFile, options: options, node: newNode, range: { pos: pos, end: pos } });
+                return this;
+            };
+            ChangeTracker.prototype.insertNodeBefore = function (sourceFile, before, newNode, options) {
+                if (options === void 0) { options = {}; }
+                var startPosition = getAdjustedStartPosition(sourceFile, before, options, Position.Start);
+                this.changes.push({ sourceFile: sourceFile, options: options, useIndentationFromFile: true, node: newNode, range: { pos: startPosition, end: startPosition } });
+                return this;
+            };
+            ChangeTracker.prototype.insertNodeAfter = function (sourceFile, after, newNode, options) {
+                if (options === void 0) { options = {}; }
+                if ((ts.isStatementButNotDeclaration(after)) ||
+                    after.kind === 149 /* PropertyDeclaration */ ||
+                    after.kind === 148 /* PropertySignature */ ||
+                    after.kind === 150 /* MethodSignature */) {
+                    // check if previous statement ends with semicolon
+                    // if not - insert semicolon to preserve the code from changing the meaning due to ASI
+                    if (sourceFile.text.charCodeAt(after.end - 1) !== 59 /* semicolon */) {
+                        this.changes.push({
+                            sourceFile: sourceFile,
+                            options: {},
+                            range: { pos: after.end, end: after.end },
+                            node: ts.createToken(25 /* SemicolonToken */)
+                        });
                     }
-                    // child node is outside the target range - do not dive inside
-                    if (!ts.rangeOverlapsWithStartEnd(originalRange, child.pos, child.end)) {
-                        if (child.end < originalRange.pos) {
-                            formattingScanner.skipToEndOf(child);
+                }
+                var endPosition = getAdjustedEndPosition(sourceFile, after, options);
+                this.changes.push({ sourceFile: sourceFile, options: options, useIndentationFromFile: true, node: newNode, range: { pos: endPosition, end: endPosition } });
+                return this;
+            };
+            /**
+             * This function should be used to insert nodes in lists when nodes don't carry separators as the part of the node range,
+             * i.e. arguments in arguments lists, parameters in parameter lists etc.
+             * Note that separators are part of the node in statements and class elements.
+             */
+            ChangeTracker.prototype.insertNodeInListAfter = function (sourceFile, after, newNode) {
+                var containingList = ts.formatting.SmartIndenter.getContainingList(after, sourceFile);
+                if (!containingList) {
+                    ts.Debug.fail("node is not a list element");
+                    return this;
+                }
+                var index = containingList.indexOf(after);
+                if (index < 0) {
+                    return this;
+                }
+                var end = after.getEnd();
+                if (index !== containingList.length - 1) {
+                    // any element except the last one
+                    // use next sibling as an anchor
+                    var nextToken = ts.getTokenAtPosition(sourceFile, after.end, /*includeJsDocComment*/ false);
+                    if (nextToken && isSeparator(after, nextToken)) {
+                        // for list
+                        // a, b, c
+                        // create change for adding 'e' after 'a' as
+                        // - find start of next element after a (it is b)
+                        // - use this start as start and end position in final change
+                        // - build text of change by formatting the text of node + separator + whitespace trivia of b
+                        // in multiline case it will work as
+                        //   a,
+                        //   b,
+                        //   c,
+                        // result - '*' denotes leading trivia that will be inserted after new text (displayed as '#')
+                        //   a,*
+                        // ***insertedtext<separator>#
+                        // ###b,
+                        //   c,
+                        // find line and character of the next element
+                        var lineAndCharOfNextElement = ts.getLineAndCharacterOfPosition(sourceFile, skipWhitespacesAndLineBreaks(sourceFile.text, containingList[index + 1].getFullStart()));
+                        // find line and character of the token that precedes next element (usually it is separator)
+                        var lineAndCharOfNextToken = ts.getLineAndCharacterOfPosition(sourceFile, nextToken.end);
+                        var prefix = void 0;
+                        var startPos = void 0;
+                        if (lineAndCharOfNextToken.line === lineAndCharOfNextElement.line) {
+                            // next element is located on the same line with separator:
+                            // a,$$$$b
+                            //  ^    ^
+                            //  |    |-next element
+                            //  |-separator
+                            // where $$$ is some leading trivia
+                            // for a newly inserted node we'll maintain the same relative position comparing to separator and replace leading trivia with spaces
+                            // a,    x,$$$$b
+                            //  ^    ^     ^
+                            //  |    |     |-next element
+                            //  |    |-new inserted node padded with spaces
+                            //  |-separator
+                            startPos = nextToken.end;
+                            prefix = spaces(lineAndCharOfNextElement.character - lineAndCharOfNextToken.character);
                         }
-                        return inheritedIndentation;
-                    }
-                    if (child.getFullWidth() === 0) {
-                        return inheritedIndentation;
+                        else {
+                            // next element is located on different line that separator
+                            // let insert position be the beginning of the line that contains next element
+                            startPos = ts.getStartPositionOfLine(lineAndCharOfNextElement.line, sourceFile);
+                        }
+                        this.changes.push({
+                            sourceFile: sourceFile,
+                            range: { pos: startPos, end: containingList[index + 1].getStart(sourceFile) },
+                            node: newNode,
+                            useIndentationFromFile: true,
+                            options: {
+                                prefix: prefix,
+                                // write separator and leading trivia of the next element as suffix
+                                suffix: "" + ts.tokenToString(nextToken.kind) + sourceFile.text.substring(nextToken.end, containingList[index + 1].getStart(sourceFile))
+                            }
+                        });
                     }
-                    while (formattingScanner.isOnToken()) {
-                        // proceed any parent tokens that are located prior to child.getStart()
-                        var tokenInfo = formattingScanner.readTokenInfo(node);
-                        if (tokenInfo.token.end > childStartPos) {
-                            // stop when formatting scanner advances past the beginning of the child
-                            break;
-                        }
-                        consumeTokenAndAdvanceScanner(tokenInfo, node, parentDynamicIndentation);
+                }
+                else {
+                    var afterStart = after.getStart(sourceFile);
+                    var afterStartLinePosition = ts.getLineStartPositionForPosition(afterStart, sourceFile);
+                    var separator = void 0;
+                    var multilineList = false;
+                    // insert element after the last element in the list that has more than one item
+                    // pick the element preceding the after element to:
+                    // - pick the separator
+                    // - determine if list is a multiline
+                    if (containingList.length === 1) {
+                        // if list has only one element then we'll format is as multiline if node has comment in trailing trivia, or as singleline otherwise
+                        // i.e. var x = 1 // this is x
+                        //     | new element will be inserted at this position
+                        separator = 26 /* CommaToken */;
                     }
-                    if (!formattingScanner.isOnToken()) {
-                        return inheritedIndentation;
+                    else {
+                        // element has more than one element, pick separator from the list
+                        var tokenBeforeInsertPosition = ts.findPrecedingToken(after.pos, sourceFile);
+                        separator = isSeparator(after, tokenBeforeInsertPosition) ? tokenBeforeInsertPosition.kind : 26 /* CommaToken */;
+                        // determine if list is multiline by checking lines of after element and element that precedes it.
+                        var afterMinusOneStartLinePosition = ts.getLineStartPositionForPosition(containingList[index - 1].getStart(sourceFile), sourceFile);
+                        multilineList = afterMinusOneStartLinePosition !== afterStartLinePosition;
+                    }
+                    if (hasCommentsBeforeLineBreak(sourceFile.text, after.end)) {
+                        // in this case we'll always treat containing list as multiline
+                        multilineList = true;
+                    }
+                    if (multilineList) {
+                        // insert separator immediately following the 'after' node to preserve comments in trailing trivia
+                        this.changes.push({
+                            sourceFile: sourceFile,
+                            range: { pos: end, end: end },
+                            node: ts.createToken(separator),
+                            options: {}
+                        });
+                        // use the same indentation as 'after' item
+                        var indentation = ts.formatting.SmartIndenter.findFirstNonWhitespaceColumn(afterStartLinePosition, afterStart, sourceFile, this.rulesProvider.getFormatOptions());
+                        // insert element before the line break on the line that contains 'after' element
+                        var insertPos = ts.skipTrivia(sourceFile.text, end, /*stopAfterLineBreak*/ true, /*stopAtComments*/ false);
+                        if (insertPos !== end && ts.isLineBreak(sourceFile.text.charCodeAt(insertPos - 1))) {
+                            insertPos--;
+                        }
+                        this.changes.push({
+                            sourceFile: sourceFile,
+                            range: { pos: insertPos, end: insertPos },
+                            node: newNode,
+                            options: { indentation: indentation, prefix: this.newLineCharacter }
+                        });
                     }
-                    if (ts.isToken(child)) {
-                        // if child node is a token, it does not impact indentation, proceed it using parent indentation scope rules
-                        var tokenInfo = formattingScanner.readTokenInfo(child);
-                        ts.Debug.assert(tokenInfo.token.end === child.end);
-                        consumeTokenAndAdvanceScanner(tokenInfo, node, parentDynamicIndentation, child);
-                        return inheritedIndentation;
+                    else {
+                        this.changes.push({
+                            sourceFile: sourceFile,
+                            range: { pos: end, end: end },
+                            node: newNode,
+                            options: { prefix: ts.tokenToString(separator) + " " }
+                        });
                     }
-                    var effectiveParentStartLine = child.kind === 143 /* Decorator */ ? childStartLine : undecoratedParentStartLine;
-                    var childIndentation = computeIndentation(child, childStartLine, childIndentationAmount, node, parentDynamicIndentation, effectiveParentStartLine);
-                    processNode(child, childContextNode, childStartLine, undecoratedChildStartLine, childIndentation.indentation, childIndentation.delta);
-                    childContextNode = node;
-                    if (isFirstListItem && parent.kind === 170 /* ArrayLiteralExpression */ && inheritedIndentation === -1 /* Unknown */) {
-                        inheritedIndentation = childIndentation.indentation;
+                }
+                return this;
+            };
+            ChangeTracker.prototype.getChanges = function () {
+                var _this = this;
+                var changesPerFile = ts.createFileMap();
+                // group changes per file
+                for (var _i = 0, _a = this.changes; _i < _a.length; _i++) {
+                    var c = _a[_i];
+                    var changesInFile = changesPerFile.get(c.sourceFile.path);
+                    if (!changesInFile) {
+                        changesPerFile.set(c.sourceFile.path, changesInFile = []);
+                    }
+                    changesInFile.push(c);
+                }
+                // convert changes
+                var fileChangesList = [];
+                changesPerFile.forEachValue(function (path) {
+                    var changesInFile = changesPerFile.get(path);
+                    var sourceFile = changesInFile[0].sourceFile;
+                    var fileTextChanges = { fileName: sourceFile.fileName, textChanges: [] };
+                    for (var _i = 0, _a = ChangeTracker.normalize(changesInFile); _i < _a.length; _i++) {
+                        var c = _a[_i];
+                        fileTextChanges.textChanges.push({
+                            span: _this.computeSpan(c, sourceFile),
+                            newText: _this.computeNewText(c, sourceFile)
+                        });
                     }
-                    return inheritedIndentation;
+                    fileChangesList.push(fileTextChanges);
+                });
+                return fileChangesList;
+            };
+            ChangeTracker.prototype.computeSpan = function (change, _sourceFile) {
+                return ts.createTextSpanFromBounds(change.range.pos, change.range.end);
+            };
+            ChangeTracker.prototype.computeNewText = function (change, sourceFile) {
+                if (!change.node) {
+                    // deletion case
+                    return "";
                 }
-                function processChildNodes(nodes, parent, parentStartLine, parentDynamicIndentation) {
-                    var listStartToken = getOpenTokenForList(parent, nodes);
-                    var listEndToken = getCloseTokenForOpenToken(listStartToken);
-                    var listDynamicIndentation = parentDynamicIndentation;
-                    var startLine = parentStartLine;
-                    if (listStartToken !== 0 /* Unknown */) {
-                        // introduce a new indentation scope for lists (including list start and end tokens)
-                        while (formattingScanner.isOnToken()) {
-                            var tokenInfo = formattingScanner.readTokenInfo(parent);
-                            if (tokenInfo.token.end > nodes.pos) {
-                                // stop when formatting scanner moves past the beginning of node list
-                                break;
-                            }
-                            else if (tokenInfo.token.kind === listStartToken) {
-                                // consume list start token
-                                startLine = sourceFile.getLineAndCharacterOfPosition(tokenInfo.token.pos).line;
-                                var indentation_1 = computeIndentation(tokenInfo.token, startLine, -1 /* Unknown */, parent, parentDynamicIndentation, parentStartLine);
-                                listDynamicIndentation = getDynamicIndentation(parent, parentStartLine, indentation_1.indentation, indentation_1.delta);
-                                consumeTokenAndAdvanceScanner(tokenInfo, parent, listDynamicIndentation);
-                            }
-                            else {
-                                // consume any tokens that precede the list as child elements of 'node' using its indentation scope
-                                consumeTokenAndAdvanceScanner(tokenInfo, parent, parentDynamicIndentation);
-                            }
-                        }
+                var options = change.options || {};
+                var nonFormattedText = getNonformattedText(change.node, sourceFile, this.newLine);
+                if (this.validator) {
+                    this.validator(nonFormattedText);
+                }
+                var formatOptions = this.rulesProvider.getFormatOptions();
+                var pos = change.range.pos;
+                var posStartsLine = ts.getLineStartPositionForPosition(pos, sourceFile) === pos;
+                var initialIndentation = change.options.indentation !== undefined
+                    ? change.options.indentation
+                    : change.useIndentationFromFile
+                        ? ts.formatting.SmartIndenter.getIndentation(change.range.pos, sourceFile, formatOptions, posStartsLine || (change.options.prefix === this.newLineCharacter))
+                        : 0;
+                var delta = change.options.delta !== undefined
+                    ? change.options.delta
+                    : ts.formatting.SmartIndenter.shouldIndentChildNode(change.node)
+                        ? formatOptions.indentSize
+                        : 0;
+                var text = applyFormatting(nonFormattedText, sourceFile, initialIndentation, delta, this.rulesProvider);
+                // strip initial indentation (spaces or tabs) if text will be inserted in the middle of the line
+                // however keep indentation if it is was forced
+                text = posStartsLine || change.options.indentation !== undefined ? text : text.replace(/^\s+/, "");
+                return (options.prefix || "") + text + (options.suffix || "");
+            };
+            ChangeTracker.normalize = function (changes) {
+                // order changes by start position
+                var normalized = ts.stableSort(changes, function (a, b) { return a.range.pos - b.range.pos; });
+                // verify that change intervals do not overlap, except possibly at end points.
+                for (var i = 0; i < normalized.length - 2; i++) {
+                    ts.Debug.assert(normalized[i].range.end <= normalized[i + 1].range.pos);
+                }
+                return normalized;
+            };
+            return ChangeTracker;
+        }());
+        textChanges.ChangeTracker = ChangeTracker;
+        function getNonformattedText(node, sourceFile, newLine) {
+            var options = { newLine: newLine, target: sourceFile && sourceFile.languageVersion };
+            var writer = new Writer(ts.getNewLineCharacter(options));
+            var printer = ts.createPrinter(options, writer);
+            printer.writeNode(3 /* Unspecified */, node, sourceFile, writer);
+            return { text: writer.getText(), node: assignPositionsToNode(node) };
+        }
+        textChanges.getNonformattedText = getNonformattedText;
+        function applyFormatting(nonFormattedText, sourceFile, initialIndentation, delta, rulesProvider) {
+            var lineMap = ts.computeLineStarts(nonFormattedText.text);
+            var file = {
+                text: nonFormattedText.text,
+                lineMap: lineMap,
+                getLineAndCharacterOfPosition: function (pos) { return ts.computeLineAndCharacterOfPosition(lineMap, pos); }
+            };
+            var changes = ts.formatting.formatNode(nonFormattedText.node, file, sourceFile.languageVariant, initialIndentation, delta, rulesProvider);
+            return applyChanges(nonFormattedText.text, changes);
+        }
+        textChanges.applyFormatting = applyFormatting;
+        function applyChanges(text, changes) {
+            for (var i = changes.length - 1; i >= 0; i--) {
+                var change = changes[i];
+                text = "" + text.substring(0, change.span.start) + change.newText + text.substring(ts.textSpanEnd(change.span));
+            }
+            return text;
+        }
+        textChanges.applyChanges = applyChanges;
+        function isTrivia(s) {
+            return ts.skipTrivia(s, 0) === s.length;
+        }
+        function assignPositionsToNode(node) {
+            var visited = ts.visitEachChild(node, assignPositionsToNode, ts.nullTransformationContext, assignPositionsToNodeArray, assignPositionsToNode);
+            // create proxy node for non synthesized nodes
+            var newNode = ts.nodeIsSynthesized(visited)
+                ? visited
+                : (Proxy.prototype = visited, new Proxy());
+            newNode.pos = getPos(node);
+            newNode.end = getEnd(node);
+            return newNode;
+            function Proxy() { }
+        }
+        function assignPositionsToNodeArray(nodes, visitor, test, start, count) {
+            var visited = ts.visitNodes(nodes, visitor, test, start, count);
+            if (!visited) {
+                return visited;
+            }
+            // clone nodearray if necessary
+            var nodeArray = visited === nodes ? ts.createNodeArray(visited.slice(0)) : visited;
+            nodeArray.pos = getPos(nodes);
+            nodeArray.end = getEnd(nodes);
+            return nodeArray;
+        }
+        var Writer = (function () {
+            function Writer(newLine) {
+                var _this = this;
+                this.lastNonTriviaPosition = 0;
+                this.writer = ts.createTextWriter(newLine);
+                this.onEmitNode = function (hint, node, printCallback) {
+                    if (node) {
+                        setPos(node, _this.lastNonTriviaPosition);
                     }
-                    var inheritedIndentation = -1 /* Unknown */;
-                    for (var i = 0; i < nodes.length; i++) {
-                        var child = nodes[i];
-                        inheritedIndentation = processChildNode(child, inheritedIndentation, node, listDynamicIndentation, startLine, startLine, /*isListItem*/ true, /*isFirstListItem*/ i === 0);
+                    printCallback(hint, node);
+                    if (node) {
+                        setEnd(node, _this.lastNonTriviaPosition);
                     }
-                    if (listEndToken !== 0 /* Unknown */) {
-                        if (formattingScanner.isOnToken()) {
-                            var tokenInfo = formattingScanner.readTokenInfo(parent);
-                            // consume the list end token only if it is still belong to the parent
-                            // there might be the case when current token matches end token but does not considered as one
-                            // function (x: function) <--
-                            // without this check close paren will be interpreted as list end token for function expression which is wrong
-                            if (tokenInfo.token.kind === listEndToken && ts.rangeContainsRange(parent, tokenInfo.token)) {
-                                // consume list end token
-                                consumeTokenAndAdvanceScanner(tokenInfo, parent, listDynamicIndentation);
-                            }
-                        }
+                };
+                this.onBeforeEmitNodeArray = function (nodes) {
+                    if (nodes) {
+                        setPos(nodes, _this.lastNonTriviaPosition);
                     }
-                }
-                function consumeTokenAndAdvanceScanner(currentTokenInfo, parent, dynamicIndentation, container) {
-                    ts.Debug.assert(ts.rangeContainsRange(parent, currentTokenInfo.token));
-                    var lastTriviaWasNewLine = formattingScanner.lastTrailingTriviaWasNewLine();
-                    var indentToken = false;
-                    if (currentTokenInfo.leadingTrivia) {
-                        processTrivia(currentTokenInfo.leadingTrivia, parent, childContextNode, dynamicIndentation);
+                };
+                this.onAfterEmitNodeArray = function (nodes) {
+                    if (nodes) {
+                        setEnd(nodes, _this.lastNonTriviaPosition);
                     }
-                    var lineAdded;
-                    var isTokenInRange = ts.rangeContainsRange(originalRange, currentTokenInfo.token);
-                    var tokenStart = sourceFile.getLineAndCharacterOfPosition(currentTokenInfo.token.pos);
-                    if (isTokenInRange) {
-                        var rangeHasError = rangeContainsError(currentTokenInfo.token);
-                        // save previousRange since processRange will overwrite this value with current one
-                        var savePreviousRange = previousRange;
-                        lineAdded = processRange(currentTokenInfo.token, tokenStart, parent, childContextNode, dynamicIndentation);
-                        if (rangeHasError) {
-                            // do not indent comments\token if token range overlaps with some error
-                            indentToken = false;
-                        }
-                        else {
-                            if (lineAdded !== undefined) {
-                                indentToken = lineAdded;
-                            }
-                            else {
-                                // indent token only if end line of previous range does not match start line of the token
-                                var prevEndLine = savePreviousRange && sourceFile.getLineAndCharacterOfPosition(savePreviousRange.end).line;
-                                indentToken = lastTriviaWasNewLine && tokenStart.line !== prevEndLine;
-                            }
-                        }
+                };
+                this.onBeforeEmitToken = function (node) {
+                    if (node) {
+                        setPos(node, _this.lastNonTriviaPosition);
                     }
-                    if (currentTokenInfo.trailingTrivia) {
-                        processTrivia(currentTokenInfo.trailingTrivia, parent, childContextNode, dynamicIndentation);
+                };
+                this.onAfterEmitToken = function (node) {
+                    if (node) {
+                        setEnd(node, _this.lastNonTriviaPosition);
                     }
-                    if (indentToken) {
-                        var tokenIndentation = (isTokenInRange && !rangeContainsError(currentTokenInfo.token)) ?
-                            dynamicIndentation.getIndentationForToken(tokenStart.line, currentTokenInfo.token.kind, container) :
-                            -1 /* Unknown */;
-                        var indentNextTokenOrTrivia = true;
-                        if (currentTokenInfo.leadingTrivia) {
-                            var commentIndentation = dynamicIndentation.getIndentationForComment(currentTokenInfo.token.kind, tokenIndentation, container);
-                            for (var _i = 0, _a = currentTokenInfo.leadingTrivia; _i < _a.length; _i++) {
-                                var triviaItem = _a[_i];
-                                var triviaInRange = ts.rangeContainsRange(originalRange, triviaItem);
-                                switch (triviaItem.kind) {
-                                    case 3 /* MultiLineCommentTrivia */:
-                                        if (triviaInRange) {
-                                            indentMultilineComment(triviaItem, commentIndentation, /*firstLineIsIndented*/ !indentNextTokenOrTrivia);
-                                        }
-                                        indentNextTokenOrTrivia = false;
-                                        break;
-                                    case 2 /* SingleLineCommentTrivia */:
-                                        if (indentNextTokenOrTrivia && triviaInRange) {
-                                            insertIndentation(triviaItem.pos, commentIndentation, /*lineAdded*/ false);
-                                        }
-                                        indentNextTokenOrTrivia = false;
-                                        break;
-                                    case 4 /* NewLineTrivia */:
-                                        indentNextTokenOrTrivia = true;
-                                        break;
-                                }
-                            }
-                        }
-                        // indent token only if is it is in target range and does not overlap with any error ranges
-                        if (tokenIndentation !== -1 /* Unknown */ && indentNextTokenOrTrivia) {
-                            insertIndentation(currentTokenInfo.token.pos, tokenIndentation, lineAdded);
-                            lastIndentedLine = tokenStart.line;
-                            indentationOnLastIndentedLine = tokenIndentation;
-                        }
+                };
+            }
+            Writer.prototype.setLastNonTriviaPosition = function (s, force) {
+                if (force || !isTrivia(s)) {
+                    this.lastNonTriviaPosition = this.writer.getTextPos();
+                    var i = 0;
+                    while (ts.isWhiteSpaceLike(s.charCodeAt(s.length - i - 1))) {
+                        i++;
                     }
-                    formattingScanner.advance();
-                    childContextNode = parent;
+                    // trim trailing whitespaces
+                    this.lastNonTriviaPosition -= i;
+                }
+            };
+            Writer.prototype.write = function (s) {
+                this.writer.write(s);
+                this.setLastNonTriviaPosition(s, /*force*/ false);
+            };
+            Writer.prototype.writeTextOfNode = function (text, node) {
+                this.writer.writeTextOfNode(text, node);
+            };
+            Writer.prototype.writeLine = function () {
+                this.writer.writeLine();
+            };
+            Writer.prototype.increaseIndent = function () {
+                this.writer.increaseIndent();
+            };
+            Writer.prototype.decreaseIndent = function () {
+                this.writer.decreaseIndent();
+            };
+            Writer.prototype.getText = function () {
+                return this.writer.getText();
+            };
+            Writer.prototype.rawWrite = function (s) {
+                this.writer.rawWrite(s);
+                this.setLastNonTriviaPosition(s, /*force*/ false);
+            };
+            Writer.prototype.writeLiteral = function (s) {
+                this.writer.writeLiteral(s);
+                this.setLastNonTriviaPosition(s, /*force*/ true);
+            };
+            Writer.prototype.getTextPos = function () {
+                return this.writer.getTextPos();
+            };
+            Writer.prototype.getLine = function () {
+                return this.writer.getLine();
+            };
+            Writer.prototype.getColumn = function () {
+                return this.writer.getColumn();
+            };
+            Writer.prototype.getIndent = function () {
+                return this.writer.getIndent();
+            };
+            Writer.prototype.isAtStartOfLine = function () {
+                return this.writer.isAtStartOfLine();
+            };
+            Writer.prototype.reset = function () {
+                this.writer.reset();
+                this.lastNonTriviaPosition = 0;
+            };
+            return Writer;
+        }());
+    })(textChanges = ts.textChanges || (ts.textChanges = {}));
+})(ts || (ts = {}));
+/* @internal */
+var ts;
+(function (ts) {
+    var codefix;
+    (function (codefix) {
+        var codeFixes = [];
+        function registerCodeFix(codeFix) {
+            ts.forEach(codeFix.errorCodes, function (error) {
+                var fixes = codeFixes[error];
+                if (!fixes) {
+                    fixes = [];
+                    codeFixes[error] = fixes;
+                }
+                fixes.push(codeFix);
+            });
+        }
+        codefix.registerCodeFix = registerCodeFix;
+        function getSupportedErrorCodes() {
+            return Object.keys(codeFixes);
+        }
+        codefix.getSupportedErrorCodes = getSupportedErrorCodes;
+        function getFixes(context) {
+            var fixes = codeFixes[context.errorCode];
+            var allActions = [];
+            ts.forEach(fixes, function (f) {
+                var actions = f.getCodeActions(context);
+                if (actions && actions.length > 0) {
+                    allActions = allActions.concat(actions);
+                }
+            });
+            return allActions;
+        }
+        codefix.getFixes = getFixes;
+    })(codefix = ts.codefix || (ts.codefix = {}));
+})(ts || (ts = {}));
+/* @internal */
+var ts;
+(function (ts) {
+    var refactor;
+    (function (refactor_1) {
+        // A map with the refactor code as key, the refactor itself as value
+        // e.g.  nonSuggestableRefactors[refactorCode] -> the refactor you want
+        var refactors = ts.createMap();
+        function registerRefactor(refactor) {
+            refactors.set(refactor.name, refactor);
+        }
+        refactor_1.registerRefactor = registerRefactor;
+        function getApplicableRefactors(context) {
+            var results;
+            var refactorList = [];
+            refactors.forEach(function (refactor) {
+                refactorList.push(refactor);
+            });
+            for (var _i = 0, refactorList_1 = refactorList; _i < refactorList_1.length; _i++) {
+                var refactor_2 = refactorList_1[_i];
+                if (context.cancellationToken && context.cancellationToken.isCancellationRequested()) {
+                    return results;
+                }
+                var infos = refactor_2.getAvailableActions(context);
+                if (infos && infos.length) {
+                    (_a = (results || (results = []))).push.apply(_a, infos);
+                }
+            }
+            return results;
+            var _a;
+        }
+        refactor_1.getApplicableRefactors = getApplicableRefactors;
+        function getEditsForRefactor(context, refactorName, actionName) {
+            var refactor = refactors.get(refactorName);
+            return refactor && refactor.getEditsForAction(context, actionName);
+        }
+        refactor_1.getEditsForRefactor = getEditsForRefactor;
+    })(refactor = ts.refactor || (ts.refactor = {}));
+})(ts || (ts = {}));
+/* @internal */
+var ts;
+(function (ts) {
+    var codefix;
+    (function (codefix) {
+        codefix.registerCodeFix({
+            errorCodes: [ts.Diagnostics.Class_0_incorrectly_implements_interface_1.code],
+            getCodeActions: getActionForClassLikeIncorrectImplementsInterface
+        });
+        function getActionForClassLikeIncorrectImplementsInterface(context) {
+            var sourceFile = context.sourceFile;
+            var start = context.span.start;
+            var token = ts.getTokenAtPosition(sourceFile, start, /*includeJsDocComment*/ false);
+            var checker = context.program.getTypeChecker();
+            var classDeclaration = ts.getContainingClass(token);
+            if (!classDeclaration) {
+                return undefined;
+            }
+            var openBrace = ts.getOpenBraceOfClassLike(classDeclaration, sourceFile);
+            var classType = checker.getTypeAtLocation(classDeclaration);
+            var implementedTypeNodes = ts.getClassImplementsHeritageClauseElements(classDeclaration);
+            var hasNumericIndexSignature = !!checker.getIndexTypeOfType(classType, 1 /* Number */);
+            var hasStringIndexSignature = !!checker.getIndexTypeOfType(classType, 0 /* String */);
+            var result = [];
+            for (var _i = 0, implementedTypeNodes_2 = implementedTypeNodes; _i < implementedTypeNodes_2.length; _i++) {
+                var implementedTypeNode = implementedTypeNodes_2[_i];
+                // Note that this is ultimately derived from a map indexed by symbol names,
+                // so duplicates cannot occur.
+                var implementedType = checker.getTypeAtLocation(implementedTypeNode);
+                var implementedTypeSymbols = checker.getPropertiesOfType(implementedType);
+                var nonPrivateMembers = implementedTypeSymbols.filter(function (symbol) { return !(ts.getModifierFlags(symbol.valueDeclaration) & 8 /* Private */); });
+                var newNodes = [];
+                createAndAddMissingIndexSignatureDeclaration(implementedType, 1 /* Number */, hasNumericIndexSignature, newNodes);
+                createAndAddMissingIndexSignatureDeclaration(implementedType, 0 /* String */, hasStringIndexSignature, newNodes);
+                newNodes = newNodes.concat(codefix.createMissingMemberNodes(classDeclaration, nonPrivateMembers, checker));
+                var message = ts.formatStringFromArgs(ts.getLocaleSpecificMessage(ts.Diagnostics.Implement_interface_0), [implementedTypeNode.getText()]);
+                if (newNodes.length > 0) {
+                    pushAction(result, newNodes, message);
+                }
+            }
+            return result;
+            function createAndAddMissingIndexSignatureDeclaration(type, kind, hasIndexSigOfKind, newNodes) {
+                if (hasIndexSigOfKind) {
+                    return;
                 }
-            }
-            function processTrivia(trivia, parent, contextNode, dynamicIndentation) {
-                for (var _i = 0, trivia_1 = trivia; _i < trivia_1.length; _i++) {
-                    var triviaItem = trivia_1[_i];
-                    if (ts.isComment(triviaItem.kind) && ts.rangeContainsRange(originalRange, triviaItem)) {
-                        var triviaItemStart = sourceFile.getLineAndCharacterOfPosition(triviaItem.pos);
-                        processRange(triviaItem, triviaItemStart, parent, contextNode, dynamicIndentation);
-                    }
+                var indexInfoOfKind = checker.getIndexInfoOfType(type, kind);
+                if (!indexInfoOfKind) {
+                    return;
                 }
+                var newIndexSignatureDeclaration = checker.indexInfoToIndexSignatureDeclaration(indexInfoOfKind, kind, classDeclaration);
+                newNodes.push(newIndexSignatureDeclaration);
             }
-            function processRange(range, rangeStart, parent, contextNode, dynamicIndentation) {
-                var rangeHasError = rangeContainsError(range);
-                var lineAdded;
-                if (!rangeHasError && !previousRangeHasError) {
-                    if (!previousRange) {
-                        // trim whitespaces starting from the beginning of the span up to the current line
-                        var originalStart = sourceFile.getLineAndCharacterOfPosition(originalRange.pos);
-                        trimTrailingWhitespacesForLines(originalStart.line, rangeStart.line);
-                    }
-                    else {
-                        lineAdded =
-                            processPair(range, rangeStart.line, parent, previousRange, previousRangeStartLine, previousParent, contextNode, dynamicIndentation);
-                    }
+            function pushAction(result, newNodes, description) {
+                var newAction = {
+                    description: description,
+                    changes: codefix.newNodesToChanges(newNodes, openBrace, context)
+                };
+                result.push(newAction);
+            }
+        }
+    })(codefix = ts.codefix || (ts.codefix = {}));
+})(ts || (ts = {}));
+/* @internal */
+var ts;
+(function (ts) {
+    var codefix;
+    (function (codefix) {
+        codefix.registerCodeFix({
+            errorCodes: [ts.Diagnostics.Property_0_does_not_exist_on_type_1.code,
+                ts.Diagnostics.Property_0_does_not_exist_on_type_1_Did_you_mean_2.code],
+            getCodeActions: getActionsForAddMissingMember
+        });
+        function getActionsForAddMissingMember(context) {
+            var tokenSourceFile = context.sourceFile;
+            var start = context.span.start;
+            // The identifier of the missing property. eg:
+            // this.missing = 1;
+            //      ^^^^^^^
+            var token = ts.getTokenAtPosition(tokenSourceFile, start, /*includeJsDocComment*/ false);
+            if (token.kind !== 71 /* Identifier */) {
+                return undefined;
+            }
+            if (!ts.isPropertyAccessExpression(token.parent)) {
+                return undefined;
+            }
+            var tokenName = token.getText(tokenSourceFile);
+            var makeStatic = false;
+            var classDeclaration;
+            if (token.parent.expression.kind === 99 /* ThisKeyword */) {
+                var containingClassMemberDeclaration = ts.getThisContainer(token, /*includeArrowFunctions*/ false);
+                if (!ts.isClassElement(containingClassMemberDeclaration)) {
+                    return undefined;
                 }
-                previousRange = range;
-                previousParent = parent;
-                previousRangeStartLine = rangeStart.line;
-                previousRangeHasError = rangeHasError;
-                return lineAdded;
+                classDeclaration = containingClassMemberDeclaration.parent;
+                // Property accesses on `this` in a static method are accesses of a static member.
+                makeStatic = classDeclaration && ts.hasModifier(containingClassMemberDeclaration, 32 /* Static */);
             }
-            function processPair(currentItem, currentStartLine, currentParent, previousItem, previousStartLine, previousParent, contextNode, dynamicIndentation) {
-                formattingContext.updateContext(previousItem, previousParent, currentItem, currentParent, contextNode);
-                var rule = rulesProvider.getRulesMap().GetRule(formattingContext);
-                var trimTrailingWhitespaces;
-                var lineAdded;
-                if (rule) {
-                    applyRuleEdits(rule, previousItem, previousStartLine, currentItem, currentStartLine);
-                    if (rule.Operation.Action & (2 /* Space */ | 8 /* Delete */) && currentStartLine !== previousStartLine) {
-                        lineAdded = false;
-                        // Handle the case where the next line is moved to be the end of this line.
-                        // In this case we don't indent the next line in the next pass.
-                        if (currentParent.getStart(sourceFile) === currentItem.pos) {
-                            dynamicIndentation.recomputeIndentation(/*lineAddedByFormatting*/ false);
-                        }
-                    }
-                    else if (rule.Operation.Action & 4 /* NewLine */ && currentStartLine === previousStartLine) {
-                        lineAdded = true;
-                        // Handle the case where token2 is moved to the new line.
-                        // In this case we indent token2 in the next pass but we set
-                        // sameLineIndent flag to notify the indenter that the indentation is within the line.
-                        if (currentParent.getStart(sourceFile) === currentItem.pos) {
-                            dynamicIndentation.recomputeIndentation(/*lineAddedByFormatting*/ true);
+            else {
+                var checker = context.program.getTypeChecker();
+                var leftExpression = token.parent.expression;
+                var leftExpressionType = checker.getTypeAtLocation(leftExpression);
+                if (leftExpressionType.flags & 32768 /* Object */) {
+                    var symbol = leftExpressionType.symbol;
+                    if (symbol.flags & 32 /* Class */) {
+                        classDeclaration = symbol.declarations && symbol.declarations[0];
+                        if (leftExpressionType !== checker.getDeclaredTypeOfSymbol(symbol)) {
+                            // The expression is a class symbol but the type is not the instance-side.
+                            makeStatic = true;
                         }
                     }
-                    // We need to trim trailing whitespace between the tokens if they were on different lines, and no rule was applied to put them on the same line
-                    trimTrailingWhitespaces = !(rule.Operation.Action & 8 /* Delete */) && rule.Flag !== 1 /* CanDeleteNewLines */;
-                }
-                else {
-                    trimTrailingWhitespaces = true;
-                }
-                if (currentStartLine !== previousStartLine && trimTrailingWhitespaces) {
-                    // We need to trim trailing whitespace between the tokens if they were on different lines, and no rule was applied to put them on the same line
-                    trimTrailingWhitespacesForLines(previousStartLine, currentStartLine, previousItem);
                 }
-                return lineAdded;
             }
-            function insertIndentation(pos, indentation, lineAdded) {
-                var indentationString = getIndentationString(indentation, options);
-                if (lineAdded) {
-                    // new line is added before the token by the formatting rules
-                    // insert indentation string at the very beginning of the token
-                    recordReplace(pos, 0, indentationString);
+            if (!classDeclaration || !ts.isClassLike(classDeclaration)) {
+                return undefined;
+            }
+            var classDeclarationSourceFile = ts.getSourceFileOfNode(classDeclaration);
+            var classOpenBrace = ts.getOpenBraceOfClassLike(classDeclaration, classDeclarationSourceFile);
+            return ts.isInJavaScriptFile(classDeclarationSourceFile) ?
+                getActionsForAddMissingMemberInJavaScriptFile(classDeclaration, makeStatic) :
+                getActionsForAddMissingMemberInTypeScriptFile(classDeclaration, makeStatic);
+            function getActionsForAddMissingMemberInJavaScriptFile(classDeclaration, makeStatic) {
+                var actions;
+                var methodCodeAction = getActionForMethodDeclaration(/*includeTypeScriptSyntax*/ false);
+                if (methodCodeAction) {
+                    actions = [methodCodeAction];
+                }
+                if (makeStatic) {
+                    if (classDeclaration.kind === 199 /* ClassExpression */) {
+                        return actions;
+                    }
+                    var className = classDeclaration.name.getText();
+                    var staticInitialization = ts.createStatement(ts.createAssignment(ts.createPropertyAccess(ts.createIdentifier(className), tokenName), ts.createIdentifier("undefined")));
+                    var staticInitializationChangeTracker = ts.textChanges.ChangeTracker.fromCodeFixContext(context);
+                    staticInitializationChangeTracker.insertNodeAfter(classDeclarationSourceFile, classDeclaration, staticInitialization, { suffix: context.newLineCharacter });
+                    var initializeStaticAction = {
+                        description: ts.formatStringFromArgs(ts.getLocaleSpecificMessage(ts.Diagnostics.Initialize_static_property_0), [tokenName]),
+                        changes: staticInitializationChangeTracker.getChanges()
+                    };
+                    (actions || (actions = [])).push(initializeStaticAction);
+                    return actions;
                 }
                 else {
-                    var tokenStart = sourceFile.getLineAndCharacterOfPosition(pos);
-                    var startLinePosition = ts.getStartPositionOfLine(tokenStart.line, sourceFile);
-                    if (indentation !== tokenStart.character || indentationIsDifferent(indentationString, startLinePosition)) {
-                        recordReplace(startLinePosition, tokenStart.character, indentationString);
-                    }
+                    var classConstructor = ts.getFirstConstructorWithBody(classDeclaration);
+                    if (!classConstructor) {
+                        return actions;
+                    }
+                    var propertyInitialization = ts.createStatement(ts.createAssignment(ts.createPropertyAccess(ts.createThis(), tokenName), ts.createIdentifier("undefined")));
+                    var propertyInitializationChangeTracker = ts.textChanges.ChangeTracker.fromCodeFixContext(context);
+                    propertyInitializationChangeTracker.insertNodeAt(classDeclarationSourceFile, classConstructor.body.getEnd() - 1, propertyInitialization, { prefix: context.newLineCharacter, suffix: context.newLineCharacter });
+                    var initializeAction = {
+                        description: ts.formatStringFromArgs(ts.getLocaleSpecificMessage(ts.Diagnostics.Initialize_property_0_in_the_constructor), [tokenName]),
+                        changes: propertyInitializationChangeTracker.getChanges()
+                    };
+                    (actions || (actions = [])).push(initializeAction);
+                    return actions;
+                }
+            }
+            function getActionsForAddMissingMemberInTypeScriptFile(classDeclaration, makeStatic) {
+                var actions;
+                var methodCodeAction = getActionForMethodDeclaration(/*includeTypeScriptSyntax*/ true);
+                if (methodCodeAction) {
+                    actions = [methodCodeAction];
+                }
+                var typeNode;
+                if (token.parent.parent.kind === 194 /* BinaryExpression */) {
+                    var binaryExpression = token.parent.parent;
+                    var otherExpression = token.parent === binaryExpression.left ? binaryExpression.right : binaryExpression.left;
+                    var checker = context.program.getTypeChecker();
+                    var widenedType = checker.getWidenedType(checker.getBaseTypeOfLiteralType(checker.getTypeAtLocation(otherExpression)));
+                    typeNode = checker.typeToTypeNode(widenedType, classDeclaration);
+                }
+                typeNode = typeNode || ts.createKeywordTypeNode(119 /* AnyKeyword */);
+                var property = ts.createProperty(
+                /*decorators*/ undefined, 
+                /*modifiers*/ makeStatic ? [ts.createToken(115 /* StaticKeyword */)] : undefined, tokenName, 
+                /*questionToken*/ undefined, typeNode, 
+                /*initializer*/ undefined);
+                var propertyChangeTracker = ts.textChanges.ChangeTracker.fromCodeFixContext(context);
+                propertyChangeTracker.insertNodeAfter(classDeclarationSourceFile, classOpenBrace, property, { suffix: context.newLineCharacter });
+                (actions || (actions = [])).push({
+                    description: ts.formatStringFromArgs(ts.getLocaleSpecificMessage(ts.Diagnostics.Declare_property_0), [tokenName]),
+                    changes: propertyChangeTracker.getChanges()
+                });
+                if (!makeStatic) {
+                    // Index signatures cannot have the static modifier.
+                    var stringTypeNode = ts.createKeywordTypeNode(136 /* StringKeyword */);
+                    var indexingParameter = ts.createParameter(
+                    /*decorators*/ undefined, 
+                    /*modifiers*/ undefined, 
+                    /*dotDotDotToken*/ undefined, "x", 
+                    /*questionToken*/ undefined, stringTypeNode, 
+                    /*initializer*/ undefined);
+                    var indexSignature = ts.createIndexSignature(
+                    /*decorators*/ undefined, 
+                    /*modifiers*/ undefined, [indexingParameter], typeNode);
+                    var indexSignatureChangeTracker = ts.textChanges.ChangeTracker.fromCodeFixContext(context);
+                    indexSignatureChangeTracker.insertNodeAfter(classDeclarationSourceFile, classOpenBrace, indexSignature, { suffix: context.newLineCharacter });
+                    actions.push({
+                        description: ts.formatStringFromArgs(ts.getLocaleSpecificMessage(ts.Diagnostics.Add_index_signature_for_property_0), [tokenName]),
+                        changes: indexSignatureChangeTracker.getChanges()
+                    });
                 }
+                return actions;
             }
-            function indentationIsDifferent(indentationString, startLinePosition) {
-                return indentationString !== sourceFile.text.substr(startLinePosition, indentationString.length);
+            function getActionForMethodDeclaration(includeTypeScriptSyntax) {
+                if (token.parent.parent.kind === 181 /* CallExpression */) {
+                    var callExpression = token.parent.parent;
+                    var methodDeclaration = codefix.createMethodFromCallExpression(callExpression, tokenName, includeTypeScriptSyntax, makeStatic);
+                    var methodDeclarationChangeTracker = ts.textChanges.ChangeTracker.fromCodeFixContext(context);
+                    methodDeclarationChangeTracker.insertNodeAfter(classDeclarationSourceFile, classOpenBrace, methodDeclaration, { suffix: context.newLineCharacter });
+                    return {
+                        description: ts.formatStringFromArgs(ts.getLocaleSpecificMessage(makeStatic ?
+                            ts.Diagnostics.Declare_method_0 :
+                            ts.Diagnostics.Declare_static_method_0), [tokenName]),
+                        changes: methodDeclarationChangeTracker.getChanges()
+                    };
+                }
             }
-            function indentMultilineComment(commentRange, indentation, firstLineIsIndented) {
-                // split comment in lines
-                var startLine = sourceFile.getLineAndCharacterOfPosition(commentRange.pos).line;
-                var endLine = sourceFile.getLineAndCharacterOfPosition(commentRange.end).line;
-                var parts;
-                if (startLine === endLine) {
-                    if (!firstLineIsIndented) {
-                        // treat as single line comment
-                        insertIndentation(commentRange.pos, indentation, /*lineAdded*/ false);
-                    }
-                    return;
+        }
+    })(codefix = ts.codefix || (ts.codefix = {}));
+})(ts || (ts = {}));
+/* @internal */
+var ts;
+(function (ts) {
+    var codefix;
+    (function (codefix) {
+        codefix.registerCodeFix({
+            errorCodes: [ts.Diagnostics.Property_0_does_not_exist_on_type_1_Did_you_mean_2.code,
+                ts.Diagnostics.Cannot_find_name_0_Did_you_mean_1.code],
+            getCodeActions: getActionsForCorrectSpelling
+        });
+        function getActionsForCorrectSpelling(context) {
+            var sourceFile = context.sourceFile;
+            // This is the identifier of the misspelled word. eg:
+            // this.speling = 1;
+            //      ^^^^^^^
+            var node = ts.getTokenAtPosition(sourceFile, context.span.start, /*includeJsDocComment*/ false); // TODO: GH#15852
+            var checker = context.program.getTypeChecker();
+            var suggestion;
+            if (node.kind === 71 /* Identifier */ && ts.isPropertyAccessExpression(node.parent)) {
+                var containingType = checker.getTypeAtLocation(node.parent.expression);
+                suggestion = checker.getSuggestionForNonexistentProperty(node, containingType);
+            }
+            else {
+                var meaning = ts.getMeaningFromLocation(node);
+                suggestion = checker.getSuggestionForNonexistentSymbol(node, ts.getTextOfNode(node), convertSemanticMeaningToSymbolFlags(meaning));
+            }
+            if (suggestion) {
+                return [{
+                        description: ts.formatStringFromArgs(ts.getLocaleSpecificMessage(ts.Diagnostics.Change_spelling_to_0), [suggestion]),
+                        changes: [{
+                                fileName: sourceFile.fileName,
+                                textChanges: [{
+                                        span: { start: node.getStart(), length: node.getWidth() },
+                                        newText: suggestion
+                                    }],
+                            }],
+                    }];
+            }
+        }
+        function convertSemanticMeaningToSymbolFlags(meaning) {
+            var flags = 0;
+            if (meaning & 4 /* Namespace */) {
+                flags |= 1920 /* Namespace */;
+            }
+            if (meaning & 2 /* Type */) {
+                flags |= 793064 /* Type */;
+            }
+            if (meaning & 1 /* Value */) {
+                flags |= 107455 /* Value */;
+            }
+            return flags;
+        }
+    })(codefix = ts.codefix || (ts.codefix = {}));
+})(ts || (ts = {}));
+/* @internal */
+var ts;
+(function (ts) {
+    var codefix;
+    (function (codefix) {
+        codefix.registerCodeFix({
+            errorCodes: [ts.Diagnostics.Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2.code],
+            getCodeActions: getActionForClassLikeMissingAbstractMember
+        });
+        codefix.registerCodeFix({
+            errorCodes: [ts.Diagnostics.Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1.code],
+            getCodeActions: getActionForClassLikeMissingAbstractMember
+        });
+        function getActionForClassLikeMissingAbstractMember(context) {
+            var sourceFile = context.sourceFile;
+            var start = context.span.start;
+            // This is the identifier in the case of a class declaration
+            // or the class keyword token in the case of a class expression.
+            var token = ts.getTokenAtPosition(sourceFile, start, /*includeJsDocComment*/ false);
+            var checker = context.program.getTypeChecker();
+            if (ts.isClassLike(token.parent)) {
+                var classDeclaration = token.parent;
+                var extendsNode = ts.getClassExtendsHeritageClauseElement(classDeclaration);
+                var instantiatedExtendsType = checker.getTypeAtLocation(extendsNode);
+                // Note that this is ultimately derived from a map indexed by symbol names,
+                // so duplicates cannot occur.
+                var extendsSymbols = checker.getPropertiesOfType(instantiatedExtendsType);
+                var abstractAndNonPrivateExtendsSymbols = extendsSymbols.filter(symbolPointsToNonPrivateAndAbstractMember);
+                var newNodes = codefix.createMissingMemberNodes(classDeclaration, abstractAndNonPrivateExtendsSymbols, checker);
+                var changes = codefix.newNodesToChanges(newNodes, ts.getOpenBraceOfClassLike(classDeclaration, sourceFile), context);
+                if (changes && changes.length > 0) {
+                    return [{
+                            description: ts.getLocaleSpecificMessage(ts.Diagnostics.Implement_inherited_abstract_class),
+                            changes: changes
+                        }];
                 }
-                else {
-                    parts = [];
-                    var startPos = commentRange.pos;
-                    for (var line = startLine; line < endLine; line++) {
-                        var endOfLine = ts.getEndLinePosition(line, sourceFile);
-                        parts.push({ pos: startPos, end: endOfLine });
-                        startPos = ts.getStartPositionOfLine(line + 1, sourceFile);
-                    }
-                    parts.push({ pos: startPos, end: commentRange.end });
+            }
+            return undefined;
+        }
+        function symbolPointsToNonPrivateAndAbstractMember(symbol) {
+            var decls = symbol.getDeclarations();
+            ts.Debug.assert(!!(decls && decls.length > 0));
+            var flags = ts.getModifierFlags(decls[0]);
+            return !(flags & 8 /* Private */) && !!(flags & 128 /* Abstract */);
+        }
+    })(codefix = ts.codefix || (ts.codefix = {}));
+})(ts || (ts = {}));
+/* @internal */
+var ts;
+(function (ts) {
+    var codefix;
+    (function (codefix) {
+        codefix.registerCodeFix({
+            errorCodes: [ts.Diagnostics.super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class.code],
+            getCodeActions: function (context) {
+                var sourceFile = context.sourceFile;
+                var token = ts.getTokenAtPosition(sourceFile, context.span.start, /*includeJsDocComment*/ false);
+                if (token.kind !== 99 /* ThisKeyword */) {
+                    return undefined;
                 }
-                var startLinePos = ts.getStartPositionOfLine(startLine, sourceFile);
-                var nonWhitespaceColumnInFirstPart = formatting.SmartIndenter.findFirstNonWhitespaceCharacterAndColumn(startLinePos, parts[0].pos, sourceFile, options);
-                if (indentation === nonWhitespaceColumnInFirstPart.column) {
-                    return;
+                var constructor = ts.getContainingFunction(token);
+                var superCall = findSuperCall(constructor.body);
+                if (!superCall) {
+                    return undefined;
                 }
-                var startIndex = 0;
-                if (firstLineIsIndented) {
-                    startIndex = 1;
-                    startLine++;
+                // figure out if the `this` access is actually inside the supercall
+                // i.e. super(this.a), since in that case we won't suggest a fix
+                if (superCall.expression && superCall.expression.kind === 181 /* CallExpression */) {
+                    var arguments_1 = superCall.expression.arguments;
+                    for (var i = 0; i < arguments_1.length; i++) {
+                        if (arguments_1[i].expression === token) {
+                            return undefined;
+                        }
+                    }
                 }
-                // shift all parts on the delta size
-                var delta = indentation - nonWhitespaceColumnInFirstPart.column;
-                for (var i = startIndex, len = parts.length; i < len; i++, startLine++) {
-                    var startLinePos_1 = ts.getStartPositionOfLine(startLine, sourceFile);
-                    var nonWhitespaceCharacterAndColumn = i === 0
-                        ? nonWhitespaceColumnInFirstPart
-                        : formatting.SmartIndenter.findFirstNonWhitespaceCharacterAndColumn(parts[i].pos, parts[i].end, sourceFile, options);
-                    var newIndentation = nonWhitespaceCharacterAndColumn.column + delta;
-                    if (newIndentation > 0) {
-                        var indentationString = getIndentationString(newIndentation, options);
-                        recordReplace(startLinePos_1, nonWhitespaceCharacterAndColumn.character, indentationString);
+                var changeTracker = ts.textChanges.ChangeTracker.fromCodeFixContext(context);
+                changeTracker.insertNodeAfter(sourceFile, ts.getOpenBrace(constructor, sourceFile), superCall, { suffix: context.newLineCharacter });
+                changeTracker.deleteNode(sourceFile, superCall);
+                return [{
+                        description: ts.getLocaleSpecificMessage(ts.Diagnostics.Make_super_call_the_first_statement_in_the_constructor),
+                        changes: changeTracker.getChanges()
+                    }];
+                function findSuperCall(n) {
+                    if (n.kind === 210 /* ExpressionStatement */ && ts.isSuperCall(n.expression)) {
+                        return n;
                     }
-                    else {
-                        recordDelete(startLinePos_1, nonWhitespaceCharacterAndColumn.character);
+                    if (ts.isFunctionLike(n)) {
+                        return undefined;
                     }
+                    return ts.forEachChild(n, findSuperCall);
                 }
             }
-            function trimTrailingWhitespacesForLines(line1, line2, range) {
-                for (var line = line1; line < line2; line++) {
-                    var lineStartPosition = ts.getStartPositionOfLine(line, sourceFile);
-                    var lineEndPosition = ts.getEndLinePosition(line, sourceFile);
-                    // do not trim whitespaces in comments or template expression
-                    if (range && (ts.isComment(range.kind) || ts.isStringOrRegularExpressionOrTemplateLiteral(range.kind)) && range.pos <= lineEndPosition && range.end > lineEndPosition) {
-                        continue;
-                    }
-                    var whitespaceStart = getTrailingWhitespaceStartPosition(lineStartPosition, lineEndPosition);
-                    if (whitespaceStart !== -1) {
-                        ts.Debug.assert(whitespaceStart === lineStartPosition || !ts.isWhiteSpaceSingleLine(sourceFile.text.charCodeAt(whitespaceStart - 1)));
-                        recordDelete(whitespaceStart, lineEndPosition + 1 - whitespaceStart);
-                    }
+        });
+    })(codefix = ts.codefix || (ts.codefix = {}));
+})(ts || (ts = {}));
+/* @internal */
+var ts;
+(function (ts) {
+    var codefix;
+    (function (codefix) {
+        codefix.registerCodeFix({
+            errorCodes: [ts.Diagnostics.Constructors_for_derived_classes_must_contain_a_super_call.code],
+            getCodeActions: function (context) {
+                var sourceFile = context.sourceFile;
+                var token = ts.getTokenAtPosition(sourceFile, context.span.start, /*includeJsDocComment*/ false);
+                if (token.kind !== 123 /* ConstructorKeyword */) {
+                    return undefined;
                 }
+                var changeTracker = ts.textChanges.ChangeTracker.fromCodeFixContext(context);
+                var superCall = ts.createStatement(ts.createCall(ts.createSuper(), /*typeArguments*/ undefined, /*argumentsArray*/ ts.emptyArray));
+                changeTracker.insertNodeAfter(sourceFile, ts.getOpenBrace(token.parent, sourceFile), superCall, { suffix: context.newLineCharacter });
+                return [{
+                        description: ts.getLocaleSpecificMessage(ts.Diagnostics.Add_missing_super_call),
+                        changes: changeTracker.getChanges()
+                    }];
             }
-            /**
-             * @param start The position of the first character in range
-             * @param end The position of the last character in range
-             */
-            function getTrailingWhitespaceStartPosition(start, end) {
-                var pos = end;
-                while (pos >= start && ts.isWhiteSpaceSingleLine(sourceFile.text.charCodeAt(pos))) {
-                    pos--;
+        });
+    })(codefix = ts.codefix || (ts.codefix = {}));
+})(ts || (ts = {}));
+/* @internal */
+var ts;
+(function (ts) {
+    var codefix;
+    (function (codefix) {
+        codefix.registerCodeFix({
+            errorCodes: [ts.Diagnostics.Cannot_extend_an_interface_0_Did_you_mean_implements.code],
+            getCodeActions: function (context) {
+                var sourceFile = context.sourceFile;
+                var start = context.span.start;
+                var token = ts.getTokenAtPosition(sourceFile, start, /*includeJsDocComment*/ false);
+                var classDeclNode = ts.getContainingClass(token);
+                if (!(token.kind === 71 /* Identifier */ && ts.isClassLike(classDeclNode))) {
+                    return undefined;
                 }
-                if (pos !== end) {
-                    return pos + 1;
+                var heritageClauses = classDeclNode.heritageClauses;
+                if (!(heritageClauses && heritageClauses.length > 0)) {
+                    return undefined;
                 }
-                return -1;
-            }
-            /**
-             * Trimming will be done for lines after the previous range
-             */
-            function trimTrailingWhitespacesForRemainingRange() {
-                var startPosition = previousRange ? previousRange.end : originalRange.pos;
-                var startLine = sourceFile.getLineAndCharacterOfPosition(startPosition).line;
-                var endLine = sourceFile.getLineAndCharacterOfPosition(originalRange.end).line;
-                trimTrailingWhitespacesForLines(startLine, endLine + 1, previousRange);
-            }
-            function newTextChange(start, len, newText) {
-                return { span: ts.createTextSpan(start, len), newText: newText };
-            }
-            function recordDelete(start, len) {
-                if (len) {
-                    edits.push(newTextChange(start, len, ""));
+                var extendsToken = heritageClauses[0].getFirstToken();
+                if (!(extendsToken && extendsToken.kind === 85 /* ExtendsKeyword */)) {
+                    return undefined;
                 }
-            }
-            function recordReplace(start, len, newText) {
-                if (len || newText) {
-                    edits.push(newTextChange(start, len, newText));
+                var changeTracker = ts.textChanges.ChangeTracker.fromCodeFixContext(context);
+                changeTracker.replaceNode(sourceFile, extendsToken, ts.createToken(108 /* ImplementsKeyword */));
+                // We replace existing keywords with commas.
+                for (var i = 1; i < heritageClauses.length; i++) {
+                    var keywordToken = heritageClauses[i].getFirstToken();
+                    if (keywordToken) {
+                        changeTracker.replaceNode(sourceFile, keywordToken, ts.createToken(26 /* CommaToken */));
+                    }
                 }
+                var result = [{
+                        description: ts.getLocaleSpecificMessage(ts.Diagnostics.Change_extends_to_implements),
+                        changes: changeTracker.getChanges()
+                    }];
+                return result;
             }
-            function applyRuleEdits(rule, previousRange, previousStartLine, currentRange, currentStartLine) {
-                switch (rule.Operation.Action) {
-                    case 1 /* Ignore */:
-                        // no action required
-                        return;
-                    case 8 /* Delete */:
-                        if (previousRange.end !== currentRange.pos) {
-                            // delete characters starting from t1.end up to t2.pos exclusive
-                            recordDelete(previousRange.end, currentRange.pos - previousRange.end);
-                        }
-                        break;
-                    case 4 /* NewLine */:
-                        // exit early if we on different lines and rule cannot change number of newlines
-                        // if line1 and line2 are on subsequent lines then no edits are required - ok to exit
-                        // if line1 and line2 are separated with more than one newline - ok to exit since we cannot delete extra new lines
-                        if (rule.Flag !== 1 /* CanDeleteNewLines */ && previousStartLine !== currentStartLine) {
-                            return;
-                        }
-                        // edit should not be applied only if we have one line feed between elements
-                        var lineDelta = currentStartLine - previousStartLine;
-                        if (lineDelta !== 1) {
-                            recordReplace(previousRange.end, currentRange.pos - previousRange.end, options.newLineCharacter);
-                        }
-                        break;
-                    case 2 /* Space */:
-                        // exit early if we on different lines and rule cannot change number of newlines
-                        if (rule.Flag !== 1 /* CanDeleteNewLines */ && previousStartLine !== currentStartLine) {
-                            return;
-                        }
-                        var posDelta = currentRange.pos - previousRange.end;
-                        if (posDelta !== 1 || sourceFile.text.charCodeAt(previousRange.end) !== 32 /* space */) {
-                            recordReplace(previousRange.end, currentRange.pos - previousRange.end, " ");
-                        }
-                        break;
+        });
+    })(codefix = ts.codefix || (ts.codefix = {}));
+})(ts || (ts = {}));
+/* @internal */
+var ts;
+(function (ts) {
+    var codefix;
+    (function (codefix) {
+        codefix.registerCodeFix({
+            errorCodes: [ts.Diagnostics.Cannot_find_name_0_Did_you_mean_the_instance_member_this_0.code],
+            getCodeActions: function (context) {
+                var sourceFile = context.sourceFile;
+                var token = ts.getTokenAtPosition(sourceFile, context.span.start, /*includeJsDocComment*/ false);
+                if (token.kind !== 71 /* Identifier */) {
+                    return undefined;
                 }
+                var changeTracker = ts.textChanges.ChangeTracker.fromCodeFixContext(context);
+                changeTracker.replaceNode(sourceFile, token, ts.createPropertyAccess(ts.createThis(), token));
+                return [{
+                        description: ts.getLocaleSpecificMessage(ts.Diagnostics.Add_this_to_unresolved_variable),
+                        changes: changeTracker.getChanges()
+                    }];
             }
-        }
-        function getOpenTokenForList(node, list) {
-            switch (node.kind) {
-                case 148 /* Constructor */:
-                case 220 /* FunctionDeclaration */:
-                case 179 /* FunctionExpression */:
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                case 180 /* ArrowFunction */:
-                    if (node.typeParameters === list) {
-                        return 25 /* LessThanToken */;
-                    }
-                    else if (node.parameters === list) {
-                        return 17 /* OpenParenToken */;
+        });
+    })(codefix = ts.codefix || (ts.codefix = {}));
+})(ts || (ts = {}));
+/* @internal */
+var ts;
+(function (ts) {
+    var codefix;
+    (function (codefix) {
+        codefix.registerCodeFix({
+            errorCodes: [
+                ts.Diagnostics._0_is_declared_but_never_used.code,
+                ts.Diagnostics.Property_0_is_declared_but_never_used.code
+            ],
+            getCodeActions: function (context) {
+                var sourceFile = context.sourceFile;
+                var start = context.span.start;
+                var token = ts.getTokenAtPosition(sourceFile, start, /*includeJsDocComment*/ false);
+                // this handles var ["computed"] = 12;
+                if (token.kind === 21 /* OpenBracketToken */) {
+                    token = ts.getTokenAtPosition(sourceFile, start + 1, /*includeJsDocComment*/ false);
+                }
+                switch (token.kind) {
+                    case 71 /* Identifier */:
+                        return deleteIdentifierOrPrefixWithUnderscore(token);
+                    case 149 /* PropertyDeclaration */:
+                    case 240 /* NamespaceImport */:
+                        return [deleteNode(token.parent)];
+                    default:
+                        return [deleteDefault()];
+                }
+                function deleteDefault() {
+                    if (ts.isDeclarationName(token)) {
+                        return deleteNode(token.parent);
                     }
-                    break;
-                case 174 /* CallExpression */:
-                case 175 /* NewExpression */:
-                    if (node.typeArguments === list) {
-                        return 25 /* LessThanToken */;
+                    else if (ts.isLiteralComputedPropertyDeclarationName(token)) {
+                        return deleteNode(token.parent.parent);
                     }
-                    else if (node.arguments === list) {
-                        return 17 /* OpenParenToken */;
+                    else {
+                        return undefined;
                     }
-                    break;
-                case 155 /* TypeReference */:
-                    if (node.typeArguments === list) {
-                        return 25 /* LessThanToken */;
+                }
+                function prefixIdentifierWithUnderscore(identifier) {
+                    var startPosition = identifier.getStart(sourceFile, /*includeJsDocComment*/ false);
+                    return {
+                        description: ts.formatStringFromArgs(ts.getLocaleSpecificMessage(ts.Diagnostics.Prefix_0_with_an_underscore), { 0: token.getText() }),
+                        changes: [{
+                                fileName: sourceFile.path,
+                                textChanges: [{
+                                        span: { start: startPosition, length: 0 },
+                                        newText: "_"
+                                    }]
+                            }]
+                    };
+                }
+                function deleteIdentifierOrPrefixWithUnderscore(identifier) {
+                    var parent = identifier.parent;
+                    switch (parent.kind) {
+                        case 226 /* VariableDeclaration */:
+                            return deleteVariableDeclarationOrPrefixWithUnderscore(identifier, parent);
+                        case 145 /* TypeParameter */:
+                            var typeParameters = parent.parent.typeParameters;
+                            if (typeParameters.length === 1) {
+                                var previousToken = ts.getTokenAtPosition(sourceFile, typeParameters.pos - 1, /*includeJsDocComment*/ false);
+                                var nextToken = ts.getTokenAtPosition(sourceFile, typeParameters.end, /*includeJsDocComment*/ false);
+                                ts.Debug.assert(previousToken.kind === 27 /* LessThanToken */);
+                                ts.Debug.assert(nextToken.kind === 29 /* GreaterThanToken */);
+                                return [deleteNodeRange(previousToken, nextToken)];
+                            }
+                            else {
+                                return [deleteNodeInList(parent)];
+                            }
+                        case 146 /* Parameter */:
+                            var functionDeclaration = parent.parent;
+                            return [functionDeclaration.parameters.length === 1 ? deleteNode(parent) : deleteNodeInList(parent),
+                                prefixIdentifierWithUnderscore(identifier)];
+                        // handle case where 'import a = A;'
+                        case 237 /* ImportEqualsDeclaration */:
+                            var importEquals = ts.getAncestor(identifier, 237 /* ImportEqualsDeclaration */);
+                            return [deleteNode(importEquals)];
+                        case 242 /* ImportSpecifier */:
+                            var namedImports = parent.parent;
+                            if (namedImports.elements.length === 1) {
+                                // Only 1 import and it is unused. So the entire declaration should be removed.
+                                var importSpec = ts.getAncestor(identifier, 238 /* ImportDeclaration */);
+                                return [deleteNode(importSpec)];
+                            }
+                            else {
+                                // delete import specifier
+                                return [deleteNodeInList(parent)];
+                            }
+                        // handle case where "import d, * as ns from './file'"
+                        // or "'import {a, b as ns} from './file'"
+                        case 239 /* ImportClause */:
+                            var importClause = parent;
+                            if (!importClause.namedBindings) {
+                                var importDecl = ts.getAncestor(importClause, 238 /* ImportDeclaration */);
+                                return [deleteNode(importDecl)];
+                            }
+                            else {
+                                // import |d,| * as ns from './file'
+                                var start_4 = importClause.name.getStart(sourceFile);
+                                var nextToken = ts.getTokenAtPosition(sourceFile, importClause.name.end, /*includeJsDocComment*/ false);
+                                if (nextToken && nextToken.kind === 26 /* CommaToken */) {
+                                    // shift first non-whitespace position after comma to the start position of the node
+                                    return [deleteRange({ pos: start_4, end: ts.skipTrivia(sourceFile.text, nextToken.end, /*stopAfterLineBreaks*/ false, /*stopAtComments*/ true) })];
+                                }
+                                else {
+                                    return [deleteNode(importClause.name)];
+                                }
+                            }
+                        case 240 /* NamespaceImport */:
+                            var namespaceImport = parent;
+                            if (namespaceImport.name === identifier && !namespaceImport.parent.name) {
+                                var importDecl = ts.getAncestor(namespaceImport, 238 /* ImportDeclaration */);
+                                return [deleteNode(importDecl)];
+                            }
+                            else {
+                                var previousToken = ts.getTokenAtPosition(sourceFile, namespaceImport.pos - 1, /*includeJsDocComment*/ false);
+                                if (previousToken && previousToken.kind === 26 /* CommaToken */) {
+                                    var startPosition = ts.textChanges.getAdjustedStartPosition(sourceFile, previousToken, {}, ts.textChanges.Position.FullStart);
+                                    return [deleteRange({ pos: startPosition, end: namespaceImport.end })];
+                                }
+                                return [deleteRange(namespaceImport)];
+                            }
+                        default:
+                            return [deleteDefault()];
+                    }
+                }
+                // token.parent is a variableDeclaration
+                function deleteVariableDeclarationOrPrefixWithUnderscore(identifier, varDecl) {
+                    switch (varDecl.parent.parent.kind) {
+                        case 214 /* ForStatement */:
+                            var forStatement = varDecl.parent.parent;
+                            var forInitializer = forStatement.initializer;
+                            return [forInitializer.declarations.length === 1 ? deleteNode(forInitializer) : deleteNodeInList(varDecl)];
+                        case 216 /* ForOfStatement */:
+                            var forOfStatement = varDecl.parent.parent;
+                            ts.Debug.assert(forOfStatement.initializer.kind === 227 /* VariableDeclarationList */);
+                            var forOfInitializer = forOfStatement.initializer;
+                            return [
+                                replaceNode(forOfInitializer.declarations[0], ts.createObjectLiteral()),
+                                prefixIdentifierWithUnderscore(identifier)
+                            ];
+                        case 215 /* ForInStatement */:
+                            // There is no valid fix in the case of:
+                            //  for .. in
+                            return [prefixIdentifierWithUnderscore(identifier)];
+                        default:
+                            var variableStatement = varDecl.parent.parent;
+                            if (variableStatement.declarationList.declarations.length === 1) {
+                                return [deleteNode(variableStatement)];
+                            }
+                            else {
+                                return [deleteNodeInList(varDecl)];
+                            }
                     }
-            }
-            return 0 /* Unknown */;
-        }
-        function getCloseTokenForOpenToken(kind) {
-            switch (kind) {
-                case 17 /* OpenParenToken */:
-                    return 18 /* CloseParenToken */;
-                case 25 /* LessThanToken */:
-                    return 27 /* GreaterThanToken */;
-            }
-            return 0 /* Unknown */;
-        }
-        var internedSizes;
-        var internedTabsIndentation;
-        var internedSpacesIndentation;
-        function getIndentationString(indentation, options) {
-            // reset interned strings if FormatCodeOptions were changed
-            var resetInternedStrings = !internedSizes || (internedSizes.tabSize !== options.tabSize || internedSizes.indentSize !== options.indentSize);
-            if (resetInternedStrings) {
-                internedSizes = { tabSize: options.tabSize, indentSize: options.indentSize };
-                internedTabsIndentation = internedSpacesIndentation = undefined;
-            }
-            if (!options.convertTabsToSpaces) {
-                var tabs = Math.floor(indentation / options.tabSize);
-                var spaces = indentation - tabs * options.tabSize;
-                var tabString = void 0;
-                if (!internedTabsIndentation) {
-                    internedTabsIndentation = [];
                 }
-                if (internedTabsIndentation[tabs] === undefined) {
-                    internedTabsIndentation[tabs] = tabString = repeat("\t", tabs);
+                function deleteNode(n) {
+                    return makeChange(ts.textChanges.ChangeTracker.fromCodeFixContext(context).deleteNode(sourceFile, n));
                 }
-                else {
-                    tabString = internedTabsIndentation[tabs];
+                function deleteRange(range) {
+                    return makeChange(ts.textChanges.ChangeTracker.fromCodeFixContext(context).deleteRange(sourceFile, range));
                 }
-                return spaces ? tabString + repeat(" ", spaces) : tabString;
-            }
-            else {
-                var spacesString = void 0;
-                var quotient = Math.floor(indentation / options.indentSize);
-                var remainder = indentation % options.indentSize;
-                if (!internedSpacesIndentation) {
-                    internedSpacesIndentation = [];
+                function deleteNodeInList(n) {
+                    return makeChange(ts.textChanges.ChangeTracker.fromCodeFixContext(context).deleteNodeInList(sourceFile, n));
                 }
-                if (internedSpacesIndentation[quotient] === undefined) {
-                    spacesString = repeat(" ", options.indentSize * quotient);
-                    internedSpacesIndentation[quotient] = spacesString;
+                function deleteNodeRange(start, end) {
+                    return makeChange(ts.textChanges.ChangeTracker.fromCodeFixContext(context).deleteNodeRange(sourceFile, start, end));
                 }
-                else {
-                    spacesString = internedSpacesIndentation[quotient];
+                function replaceNode(n, newNode) {
+                    return makeChange(ts.textChanges.ChangeTracker.fromCodeFixContext(context).replaceNode(sourceFile, n, newNode));
                 }
-                return remainder ? spacesString + repeat(" ", remainder) : spacesString;
-            }
-            function repeat(value, count) {
-                var s = "";
-                for (var i = 0; i < count; i++) {
-                    s += value;
+                function makeChange(changeTracker) {
+                    return {
+                        description: ts.formatStringFromArgs(ts.getLocaleSpecificMessage(ts.Diagnostics.Remove_declaration_for_Colon_0), { 0: token.getText() }),
+                        changes: changeTracker.getChanges()
+                    };
                 }
-                return s;
             }
-        }
-        formatting.getIndentationString = getIndentationString;
-    })(formatting = ts.formatting || (ts.formatting = {}));
+        });
+    })(codefix = ts.codefix || (ts.codefix = {}));
 })(ts || (ts = {}));
-///<reference path='..\services.ts' />
 /* @internal */
 var ts;
 (function (ts) {
-    var formatting;
-    (function (formatting) {
-        var SmartIndenter;
-        (function (SmartIndenter) {
-            var Value;
-            (function (Value) {
-                Value[Value["Unknown"] = -1] = "Unknown";
-            })(Value || (Value = {}));
-            function getIndentation(position, sourceFile, options) {
-                if (position > sourceFile.text.length) {
-                    return getBaseIndentation(options); // past EOF
-                }
-                // no indentation when the indent style is set to none,
-                // so we can return fast
-                if (options.indentStyle === ts.IndentStyle.None) {
-                    return 0;
+    var codefix;
+    (function (codefix) {
+        codefix.registerCodeFix({
+            errorCodes: [
+                ts.Diagnostics.Cannot_find_name_0.code,
+                ts.Diagnostics.Cannot_find_name_0_Did_you_mean_1.code,
+                ts.Diagnostics.Cannot_find_namespace_0.code,
+                ts.Diagnostics._0_refers_to_a_UMD_global_but_the_current_file_is_a_module_Consider_adding_an_import_instead.code
+            ],
+            getCodeActions: getImportCodeActions
+        });
+        var ModuleSpecifierComparison;
+        (function (ModuleSpecifierComparison) {
+            ModuleSpecifierComparison[ModuleSpecifierComparison["Better"] = 0] = "Better";
+            ModuleSpecifierComparison[ModuleSpecifierComparison["Equal"] = 1] = "Equal";
+            ModuleSpecifierComparison[ModuleSpecifierComparison["Worse"] = 2] = "Worse";
+        })(ModuleSpecifierComparison || (ModuleSpecifierComparison = {}));
+        var ImportCodeActionMap = (function () {
+            function ImportCodeActionMap() {
+                this.symbolIdToActionMap = [];
+            }
+            ImportCodeActionMap.prototype.addAction = function (symbolId, newAction) {
+                if (!newAction) {
+                    return;
                 }
-                var precedingToken = ts.findPrecedingToken(position, sourceFile);
-                if (!precedingToken) {
-                    return getBaseIndentation(options);
+                var actions = this.symbolIdToActionMap[symbolId];
+                if (!actions) {
+                    this.symbolIdToActionMap[symbolId] = [newAction];
+                    return;
                 }
-                // no indentation in string \regex\template literals
-                var precedingTokenIsLiteral = ts.isStringOrRegularExpressionOrTemplateLiteral(precedingToken.kind);
-                if (precedingTokenIsLiteral && precedingToken.getStart(sourceFile) <= position && precedingToken.end > position) {
-                    return 0;
+                if (newAction.kind === "CodeChange") {
+                    actions.push(newAction);
+                    return;
                 }
-                var lineAtPosition = sourceFile.getLineAndCharacterOfPosition(position).line;
-                // indentation is first non-whitespace character in a previous line
-                // for block indentation, we should look for a line which contains something that's not
-                // whitespace.
-                if (options.indentStyle === ts.IndentStyle.Block) {
-                    // move backwards until we find a line with a non-whitespace character,
-                    // then find the first non-whitespace character for that line.
-                    var current_1 = position;
-                    while (current_1 > 0) {
-                        var char = sourceFile.text.charCodeAt(current_1);
-                        if (!ts.isWhiteSpace(char)) {
+                var updatedNewImports = [];
+                for (var _i = 0, _a = this.symbolIdToActionMap[symbolId]; _i < _a.length; _i++) {
+                    var existingAction = _a[_i];
+                    if (existingAction.kind === "CodeChange") {
+                        // only import actions should compare
+                        updatedNewImports.push(existingAction);
+                        continue;
+                    }
+                    switch (this.compareModuleSpecifiers(existingAction.moduleSpecifier, newAction.moduleSpecifier)) {
+                        case ModuleSpecifierComparison.Better:
+                            // the new one is not worth considering if it is a new import.
+                            // However if it is instead a insertion into existing import, the user might want to use
+                            // the module specifier even it is worse by our standards. So keep it.
+                            if (newAction.kind === "NewImport") {
+                                return;
+                            }
+                        // falls through
+                        case ModuleSpecifierComparison.Equal:
+                            // the current one is safe. But it is still possible that the new one is worse
+                            // than another existing one. For example, you may have new imports from "./foo/bar"
+                            // and "bar", when the new one is "bar/bar2" and the current one is "./foo/bar". The new
+                            // one and the current one are not comparable (one relative path and one absolute path),
+                            // but the new one is worse than the other one, so should not add to the list.
+                            updatedNewImports.push(existingAction);
                             break;
+                        case ModuleSpecifierComparison.Worse:
+                            // the existing one is worse, remove from the list.
+                            continue;
+                    }
+                }
+                // if we reach here, it means the new one is better or equal to all of the existing ones.
+                updatedNewImports.push(newAction);
+                this.symbolIdToActionMap[symbolId] = updatedNewImports;
+            };
+            ImportCodeActionMap.prototype.addActions = function (symbolId, newActions) {
+                for (var _i = 0, newActions_1 = newActions; _i < newActions_1.length; _i++) {
+                    var newAction = newActions_1[_i];
+                    this.addAction(symbolId, newAction);
+                }
+            };
+            ImportCodeActionMap.prototype.getAllActions = function () {
+                var result = [];
+                for (var key in this.symbolIdToActionMap) {
+                    result = ts.concatenate(result, this.symbolIdToActionMap[key]);
+                }
+                return result;
+            };
+            ImportCodeActionMap.prototype.compareModuleSpecifiers = function (moduleSpecifier1, moduleSpecifier2) {
+                if (moduleSpecifier1 === moduleSpecifier2) {
+                    return ModuleSpecifierComparison.Equal;
+                }
+                // if moduleSpecifier1 (ms1) is a substring of ms2, then it is better
+                if (moduleSpecifier2.indexOf(moduleSpecifier1) === 0) {
+                    return ModuleSpecifierComparison.Better;
+                }
+                if (moduleSpecifier1.indexOf(moduleSpecifier2) === 0) {
+                    return ModuleSpecifierComparison.Worse;
+                }
+                // if both are relative paths, and ms1 has fewer levels, then it is better
+                if (ts.isExternalModuleNameRelative(moduleSpecifier1) && ts.isExternalModuleNameRelative(moduleSpecifier2)) {
+                    var regex = new RegExp(ts.directorySeparator, "g");
+                    var moduleSpecifier1LevelCount = (moduleSpecifier1.match(regex) || []).length;
+                    var moduleSpecifier2LevelCount = (moduleSpecifier2.match(regex) || []).length;
+                    return moduleSpecifier1LevelCount < moduleSpecifier2LevelCount
+                        ? ModuleSpecifierComparison.Better
+                        : moduleSpecifier1LevelCount === moduleSpecifier2LevelCount
+                            ? ModuleSpecifierComparison.Equal
+                            : ModuleSpecifierComparison.Worse;
+                }
+                // the equal cases include when the two specifiers are not comparable.
+                return ModuleSpecifierComparison.Equal;
+            };
+            return ImportCodeActionMap;
+        }());
+        function getImportCodeActions(context) {
+            var sourceFile = context.sourceFile;
+            var checker = context.program.getTypeChecker();
+            var allSourceFiles = context.program.getSourceFiles();
+            var useCaseSensitiveFileNames = context.host.useCaseSensitiveFileNames ? context.host.useCaseSensitiveFileNames() : false;
+            var token = ts.getTokenAtPosition(sourceFile, context.span.start, /*includeJsDocComment*/ false);
+            var name = token.getText();
+            var symbolIdActionMap = new ImportCodeActionMap();
+            // this is a module id -> module import declaration map
+            var cachedImportDeclarations = [];
+            var lastImportDeclaration;
+            var currentTokenMeaning = ts.getMeaningFromLocation(token);
+            if (context.errorCode === ts.Diagnostics._0_refers_to_a_UMD_global_but_the_current_file_is_a_module_Consider_adding_an_import_instead.code) {
+                var umdSymbol = checker.getSymbolAtLocation(token);
+                var symbol = void 0;
+                var symbolName = void 0;
+                if (umdSymbol.flags & 8388608 /* Alias */) {
+                    symbol = checker.getAliasedSymbol(umdSymbol);
+                    symbolName = name;
+                }
+                else if (ts.isJsxOpeningLikeElement(token.parent) && token.parent.tagName === token) {
+                    // The error wasn't for the symbolAtLocation, it was for the JSX tag itself, which needs access to e.g. `React`.
+                    symbol = checker.getAliasedSymbol(checker.resolveNameAtLocation(token, checker.getJsxNamespace(), 107455 /* Value */));
+                    symbolName = symbol.name;
+                }
+                else {
+                    ts.Debug.fail("Either the symbol or the JSX namespace should be a UMD global if we got here");
+                }
+                return getCodeActionForImport(symbol, symbolName, /*isDefault*/ false, /*isNamespaceImport*/ true);
+            }
+            var candidateModules = checker.getAmbientModules();
+            for (var _i = 0, allSourceFiles_1 = allSourceFiles; _i < allSourceFiles_1.length; _i++) {
+                var otherSourceFile = allSourceFiles_1[_i];
+                if (otherSourceFile !== sourceFile && ts.isExternalOrCommonJsModule(otherSourceFile)) {
+                    candidateModules.push(otherSourceFile.symbol);
+                }
+            }
+            for (var _a = 0, candidateModules_1 = candidateModules; _a < candidateModules_1.length; _a++) {
+                var moduleSymbol = candidateModules_1[_a];
+                context.cancellationToken.throwIfCancellationRequested();
+                // check the default export
+                var defaultExport = checker.tryGetMemberInModuleExports("default", moduleSymbol);
+                if (defaultExport) {
+                    var localSymbol = ts.getLocalSymbolForExportDefault(defaultExport);
+                    if (localSymbol && localSymbol.name === name && checkSymbolHasMeaning(localSymbol, currentTokenMeaning)) {
+                        // check if this symbol is already used
+                        var symbolId = getUniqueSymbolId(localSymbol);
+                        symbolIdActionMap.addActions(symbolId, getCodeActionForImport(moduleSymbol, name, /*isDefault*/ true));
+                    }
+                }
+                // check exports with the same name
+                var exportSymbolWithIdenticalName = checker.tryGetMemberInModuleExports(name, moduleSymbol);
+                if (exportSymbolWithIdenticalName && checkSymbolHasMeaning(exportSymbolWithIdenticalName, currentTokenMeaning)) {
+                    var symbolId = getUniqueSymbolId(exportSymbolWithIdenticalName);
+                    symbolIdActionMap.addActions(symbolId, getCodeActionForImport(moduleSymbol, name));
+                }
+            }
+            return symbolIdActionMap.getAllActions();
+            function getImportDeclarations(moduleSymbol) {
+                var moduleSymbolId = getUniqueSymbolId(moduleSymbol);
+                var cached = cachedImportDeclarations[moduleSymbolId];
+                if (cached) {
+                    return cached;
+                }
+                var existingDeclarations = [];
+                for (var _i = 0, _a = sourceFile.imports; _i < _a.length; _i++) {
+                    var importModuleSpecifier = _a[_i];
+                    var importSymbol = checker.getSymbolAtLocation(importModuleSpecifier);
+                    if (importSymbol === moduleSymbol) {
+                        existingDeclarations.push(getImportDeclaration(importModuleSpecifier));
+                    }
+                }
+                cachedImportDeclarations[moduleSymbolId] = existingDeclarations;
+                return existingDeclarations;
+                function getImportDeclaration(moduleSpecifier) {
+                    var node = moduleSpecifier;
+                    while (node) {
+                        if (node.kind === 238 /* ImportDeclaration */) {
+                            return node;
+                        }
+                        if (node.kind === 237 /* ImportEqualsDeclaration */) {
+                            return node;
+                        }
+                        node = node.parent;
+                    }
+                    return undefined;
+                }
+            }
+            function getUniqueSymbolId(symbol) {
+                if (symbol.flags & 8388608 /* Alias */) {
+                    return ts.getSymbolId(checker.getAliasedSymbol(symbol));
+                }
+                return ts.getSymbolId(symbol);
+            }
+            function checkSymbolHasMeaning(symbol, meaning) {
+                var declarations = symbol.getDeclarations();
+                return declarations ? ts.some(symbol.declarations, function (decl) { return !!(ts.getMeaningFromDeclaration(decl) & meaning); }) : false;
+            }
+            function getCodeActionForImport(moduleSymbol, symbolName, isDefault, isNamespaceImport) {
+                var existingDeclarations = getImportDeclarations(moduleSymbol);
+                if (existingDeclarations.length > 0) {
+                    // With an existing import statement, there are more than one actions the user can do.
+                    return getCodeActionsForExistingImport(existingDeclarations);
+                }
+                else {
+                    return [getCodeActionForNewImport()];
+                }
+                function getCodeActionsForExistingImport(declarations) {
+                    var actions = [];
+                    // It is possible that multiple import statements with the same specifier exist in the file.
+                    // e.g.
+                    //
+                    //     import * as ns from "foo";
+                    //     import { member1, member2 } from "foo";
+                    //
+                    //     member3/**/ <-- cusor here
+                    //
+                    // in this case we should provie 2 actions:
+                    //     1. change "member3" to "ns.member3"
+                    //     2. add "member3" to the second import statement's import list
+                    // and it is up to the user to decide which one fits best.
+                    var namespaceImportDeclaration;
+                    var namedImportDeclaration;
+                    var existingModuleSpecifier;
+                    for (var _i = 0, declarations_14 = declarations; _i < declarations_14.length; _i++) {
+                        var declaration = declarations_14[_i];
+                        if (declaration.kind === 238 /* ImportDeclaration */) {
+                            var namedBindings = declaration.importClause && declaration.importClause.namedBindings;
+                            if (namedBindings && namedBindings.kind === 240 /* NamespaceImport */) {
+                                // case:
+                                // import * as ns from "foo"
+                                namespaceImportDeclaration = declaration;
+                            }
+                            else {
+                                // cases:
+                                // import default from "foo"
+                                // import { bar } from "foo" or combination with the first one
+                                // import "foo"
+                                namedImportDeclaration = declaration;
+                            }
+                            existingModuleSpecifier = declaration.moduleSpecifier.getText();
+                        }
+                        else {
+                            // case:
+                            // import foo = require("foo")
+                            namespaceImportDeclaration = declaration;
+                            existingModuleSpecifier = getModuleSpecifierFromImportEqualsDeclaration(declaration);
+                        }
+                    }
+                    if (namespaceImportDeclaration) {
+                        actions.push(getCodeActionForNamespaceImport(namespaceImportDeclaration));
+                    }
+                    if (!isNamespaceImport && namedImportDeclaration && namedImportDeclaration.importClause &&
+                        (namedImportDeclaration.importClause.name || namedImportDeclaration.importClause.namedBindings)) {
+                        /**
+                         * If the existing import declaration already has a named import list, just
+                         * insert the identifier into that list.
+                         */
+                        var fileTextChanges = getTextChangeForImportClause(namedImportDeclaration.importClause);
+                        var moduleSpecifierWithoutQuotes = ts.stripQuotes(namedImportDeclaration.moduleSpecifier.getText());
+                        actions.push(createCodeAction(ts.Diagnostics.Add_0_to_existing_import_declaration_from_1, [name, moduleSpecifierWithoutQuotes], fileTextChanges, "InsertingIntoExistingImport", moduleSpecifierWithoutQuotes));
+                    }
+                    else {
+                        // we need to create a new import statement, but the existing module specifier can be reused.
+                        actions.push(getCodeActionForNewImport(existingModuleSpecifier));
+                    }
+                    return actions;
+                    function getModuleSpecifierFromImportEqualsDeclaration(declaration) {
+                        if (declaration.moduleReference && declaration.moduleReference.kind === 248 /* ExternalModuleReference */) {
+                            return declaration.moduleReference.expression.getText();
+                        }
+                        return declaration.moduleReference.getText();
+                    }
+                    function getTextChangeForImportClause(importClause) {
+                        var importList = importClause.namedBindings;
+                        var newImportSpecifier = ts.createImportSpecifier(/*propertyName*/ undefined, ts.createIdentifier(name));
+                        // case 1:
+                        // original text: import default from "module"
+                        // change to: import default, { name } from "module"
+                        // case 2:
+                        // original text: import {} from "module"
+                        // change to: import { name } from "module"
+                        if (!importList || importList.elements.length === 0) {
+                            var newImportClause = ts.createImportClause(importClause.name, ts.createNamedImports([newImportSpecifier]));
+                            return createChangeTracker().replaceNode(sourceFile, importClause, newImportClause).getChanges();
+                        }
+                        /**
+                         * If the import list has one import per line, preserve that. Otherwise, insert on same line as last element
+                         *     import {
+                         *         foo
+                         *     } from "./module";
+                         */
+                        return createChangeTracker().insertNodeInListAfter(sourceFile, importList.elements[importList.elements.length - 1], newImportSpecifier).getChanges();
+                    }
+                    function getCodeActionForNamespaceImport(declaration) {
+                        var namespacePrefix;
+                        if (declaration.kind === 238 /* ImportDeclaration */) {
+                            namespacePrefix = declaration.importClause.namedBindings.name.getText();
+                        }
+                        else {
+                            namespacePrefix = declaration.name.getText();
+                        }
+                        namespacePrefix = ts.stripQuotes(namespacePrefix);
+                        /**
+                         * Cases:
+                         *     import * as ns from "mod"
+                         *     import default, * as ns from "mod"
+                         *     import ns = require("mod")
+                         *
+                         * Because there is no import list, we alter the reference to include the
+                         * namespace instead of altering the import declaration. For example, "foo" would
+                         * become "ns.foo"
+                         */
+                        return createCodeAction(ts.Diagnostics.Change_0_to_1, [name, namespacePrefix + "." + name], createChangeTracker().replaceNode(sourceFile, token, ts.createPropertyAccess(ts.createIdentifier(namespacePrefix), name)).getChanges(), "CodeChange");
+                    }
+                }
+                function getCodeActionForNewImport(moduleSpecifier) {
+                    if (!lastImportDeclaration) {
+                        // insert after any existing imports
+                        for (var i = sourceFile.statements.length - 1; i >= 0; i--) {
+                            var statement = sourceFile.statements[i];
+                            if (statement.kind === 237 /* ImportEqualsDeclaration */ || statement.kind === 238 /* ImportDeclaration */) {
+                                lastImportDeclaration = statement;
+                                break;
+                            }
+                        }
+                    }
+                    var getCanonicalFileName = ts.createGetCanonicalFileName(useCaseSensitiveFileNames);
+                    var moduleSpecifierWithoutQuotes = ts.stripQuotes(moduleSpecifier || getModuleSpecifierForNewImport());
+                    var changeTracker = createChangeTracker();
+                    var importClause = isDefault
+                        ? ts.createImportClause(ts.createIdentifier(symbolName), /*namedBindings*/ undefined)
+                        : isNamespaceImport
+                            ? ts.createImportClause(/*name*/ undefined, ts.createNamespaceImport(ts.createIdentifier(symbolName)))
+                            : ts.createImportClause(/*name*/ undefined, ts.createNamedImports([ts.createImportSpecifier(/*propertyName*/ undefined, ts.createIdentifier(symbolName))]));
+                    var importDecl = ts.createImportDeclaration(/*decorators*/ undefined, /*modifiers*/ undefined, importClause, ts.createLiteral(moduleSpecifierWithoutQuotes));
+                    if (!lastImportDeclaration) {
+                        changeTracker.insertNodeAt(sourceFile, sourceFile.getStart(), importDecl, { suffix: "" + context.newLineCharacter + context.newLineCharacter });
+                    }
+                    else {
+                        changeTracker.insertNodeAfter(sourceFile, lastImportDeclaration, importDecl, { suffix: context.newLineCharacter });
+                    }
+                    // if this file doesn't have any import statements, insert an import statement and then insert a new line
+                    // between the only import statement and user code. Otherwise just insert the statement because chances
+                    // are there are already a new line seperating code and import statements.
+                    return createCodeAction(ts.Diagnostics.Import_0_from_1, [symbolName, "\"" + moduleSpecifierWithoutQuotes + "\""], changeTracker.getChanges(), "NewImport", moduleSpecifierWithoutQuotes);
+                    function getModuleSpecifierForNewImport() {
+                        var fileName = sourceFile.fileName;
+                        var moduleFileName = moduleSymbol.valueDeclaration.getSourceFile().fileName;
+                        var sourceDirectory = ts.getDirectoryPath(fileName);
+                        var options = context.program.getCompilerOptions();
+                        return tryGetModuleNameFromAmbientModule() ||
+                            tryGetModuleNameFromTypeRoots() ||
+                            tryGetModuleNameAsNodeModule() ||
+                            tryGetModuleNameFromBaseUrl() ||
+                            tryGetModuleNameFromRootDirs() ||
+                            ts.removeFileExtension(getRelativePath(moduleFileName, sourceDirectory));
+                        function tryGetModuleNameFromAmbientModule() {
+                            var decl = moduleSymbol.valueDeclaration;
+                            if (ts.isModuleDeclaration(decl) && ts.isStringLiteral(decl.name)) {
+                                return decl.name.text;
+                            }
+                        }
+                        function tryGetModuleNameFromBaseUrl() {
+                            if (!options.baseUrl) {
+                                return undefined;
+                            }
+                            var relativeName = getRelativePathIfInDirectory(moduleFileName, options.baseUrl);
+                            if (!relativeName) {
+                                return undefined;
+                            }
+                            var relativeNameWithIndex = ts.removeFileExtension(relativeName);
+                            relativeName = removeExtensionAndIndexPostFix(relativeName);
+                            if (options.paths) {
+                                for (var key in options.paths) {
+                                    for (var _i = 0, _a = options.paths[key]; _i < _a.length; _i++) {
+                                        var pattern = _a[_i];
+                                        var indexOfStar = pattern.indexOf("*");
+                                        if (indexOfStar === 0 && pattern.length === 1) {
+                                            continue;
+                                        }
+                                        else if (indexOfStar !== -1) {
+                                            var prefix = pattern.substr(0, indexOfStar);
+                                            var suffix = pattern.substr(indexOfStar + 1);
+                                            if (relativeName.length >= prefix.length + suffix.length &&
+                                                ts.startsWith(relativeName, prefix) &&
+                                                ts.endsWith(relativeName, suffix)) {
+                                                var matchedStar = relativeName.substr(prefix.length, relativeName.length - suffix.length);
+                                                return key.replace("\*", matchedStar);
+                                            }
+                                        }
+                                        else if (pattern === relativeName || pattern === relativeNameWithIndex) {
+                                            return key;
+                                        }
+                                    }
+                                }
+                            }
+                            return relativeName;
+                        }
+                        function tryGetModuleNameFromRootDirs() {
+                            if (options.rootDirs) {
+                                var normalizedTargetPath = getPathRelativeToRootDirs(moduleFileName, options.rootDirs);
+                                var normalizedSourcePath = getPathRelativeToRootDirs(sourceDirectory, options.rootDirs);
+                                if (normalizedTargetPath !== undefined) {
+                                    var relativePath = normalizedSourcePath !== undefined ? getRelativePath(normalizedTargetPath, normalizedSourcePath) : normalizedTargetPath;
+                                    return ts.removeFileExtension(relativePath);
+                                }
+                            }
+                            return undefined;
+                        }
+                        function tryGetModuleNameFromTypeRoots() {
+                            var typeRoots = ts.getEffectiveTypeRoots(options, context.host);
+                            if (typeRoots) {
+                                var normalizedTypeRoots = ts.map(typeRoots, function (typeRoot) { return ts.toPath(typeRoot, /*basePath*/ undefined, getCanonicalFileName); });
+                                for (var _i = 0, normalizedTypeRoots_1 = normalizedTypeRoots; _i < normalizedTypeRoots_1.length; _i++) {
+                                    var typeRoot = normalizedTypeRoots_1[_i];
+                                    if (ts.startsWith(moduleFileName, typeRoot)) {
+                                        var relativeFileName = moduleFileName.substring(typeRoot.length + 1);
+                                        return removeExtensionAndIndexPostFix(relativeFileName);
+                                    }
+                                }
+                            }
+                        }
+                        function tryGetModuleNameAsNodeModule() {
+                            if (ts.getEmitModuleResolutionKind(options) !== ts.ModuleResolutionKind.NodeJs) {
+                                // nothing to do here
+                                return undefined;
+                            }
+                            var indexOfNodeModules = moduleFileName.indexOf("node_modules");
+                            if (indexOfNodeModules < 0) {
+                                return undefined;
+                            }
+                            var relativeFileName;
+                            if (sourceDirectory.indexOf(moduleFileName.substring(0, indexOfNodeModules - 1)) === 0) {
+                                // if node_modules folder is in this folder or any of its parent folder, no need to keep it.
+                                relativeFileName = moduleFileName.substring(indexOfNodeModules + 13 /* "node_modules\".length */);
+                            }
+                            else {
+                                relativeFileName = getRelativePath(moduleFileName, sourceDirectory);
+                            }
+                            relativeFileName = ts.removeFileExtension(relativeFileName);
+                            if (ts.endsWith(relativeFileName, "/index")) {
+                                relativeFileName = ts.getDirectoryPath(relativeFileName);
+                            }
+                            else {
+                                try {
+                                    var moduleDirectory = ts.getDirectoryPath(moduleFileName);
+                                    var packageJsonContent = JSON.parse(context.host.readFile(ts.combinePaths(moduleDirectory, "package.json")));
+                                    if (packageJsonContent) {
+                                        var mainFile = packageJsonContent.main || packageJsonContent.typings;
+                                        if (mainFile) {
+                                            var mainExportFile = ts.toPath(mainFile, moduleDirectory, getCanonicalFileName);
+                                            if (ts.removeFileExtension(mainExportFile) === ts.removeFileExtension(moduleFileName)) {
+                                                relativeFileName = ts.getDirectoryPath(relativeFileName);
+                                            }
+                                        }
+                                    }
+                                }
+                                catch (e) { }
+                            }
+                            return ts.getPackageNameFromAtTypesDirectory(relativeFileName);
                         }
-                        current_1--;
-                    }
-                    var lineStart = ts.getLineStartPositionForPosition(current_1, sourceFile);
-                    return SmartIndenter.findFirstNonWhitespaceColumn(lineStart, current_1, sourceFile, options);
-                }
-                if (precedingToken.kind === 24 /* CommaToken */ && precedingToken.parent.kind !== 187 /* BinaryExpression */) {
-                    // previous token is comma that separates items in list - find the previous item and try to derive indentation from it
-                    var actualIndentation = getActualIndentationForListItemBeforeComma(precedingToken, sourceFile, options);
-                    if (actualIndentation !== -1 /* Unknown */) {
-                        return actualIndentation;
                     }
-                }
-                // try to find node that can contribute to indentation and includes 'position' starting from 'precedingToken'
-                // if such node is found - compute initial indentation for 'position' inside this node
-                var previous;
-                var current = precedingToken;
-                var currentStart;
-                var indentationDelta;
-                while (current) {
-                    if (ts.positionBelongsToNode(current, position, sourceFile) && shouldIndentChildNode(current, previous)) {
-                        currentStart = getStartLineAndCharacterForNode(current, sourceFile);
-                        if (nextTokenIsCurlyBraceOnSameLineAsCursor(precedingToken, current, lineAtPosition, sourceFile)) {
-                            indentationDelta = 0;
+                    function getPathRelativeToRootDirs(path, rootDirs) {
+                        for (var _i = 0, rootDirs_2 = rootDirs; _i < rootDirs_2.length; _i++) {
+                            var rootDir = rootDirs_2[_i];
+                            var relativeName = getRelativePathIfInDirectory(path, rootDir);
+                            if (relativeName !== undefined) {
+                                return relativeName;
+                            }
                         }
-                        else {
-                            indentationDelta = lineAtPosition !== currentStart.line ? options.indentSize : 0;
+                        return undefined;
+                    }
+                    function removeExtensionAndIndexPostFix(fileName) {
+                        fileName = ts.removeFileExtension(fileName);
+                        if (ts.endsWith(fileName, "/index")) {
+                            fileName = fileName.substr(0, fileName.length - 6 /* "/index".length */);
                         }
-                        break;
+                        return fileName;
                     }
-                    // check if current node is a list item - if yes, take indentation from it
-                    var actualIndentation = getActualIndentationForListItem(current, sourceFile, options);
-                    if (actualIndentation !== -1 /* Unknown */) {
-                        return actualIndentation;
+                    function getRelativePathIfInDirectory(path, directoryPath) {
+                        var relativePath = ts.getRelativePathToDirectoryOrUrl(directoryPath, path, directoryPath, getCanonicalFileName, /*isAbsolutePathAnUrl*/ false);
+                        return ts.isRootedDiskPath(relativePath) || ts.startsWith(relativePath, "..") ? undefined : relativePath;
                     }
-                    actualIndentation = getLineIndentationWhenExpressionIsInMultiLine(current, sourceFile, options);
-                    if (actualIndentation !== -1 /* Unknown */) {
-                        return actualIndentation + options.indentSize;
+                    function getRelativePath(path, directoryPath) {
+                        var relativePath = ts.getRelativePathToDirectoryOrUrl(directoryPath, path, directoryPath, getCanonicalFileName, /*isAbsolutePathAnUrl*/ false);
+                        return ts.moduleHasNonRelativeName(relativePath) ? "./" + relativePath : relativePath;
                     }
-                    previous = current;
-                    current = current.parent;
                 }
-                if (!current) {
-                    // no parent was found - return the base indentation of the SourceFile
-                    return getBaseIndentation(options);
+            }
+            function createChangeTracker() {
+                return ts.textChanges.ChangeTracker.fromCodeFixContext(context);
+            }
+            function createCodeAction(description, diagnosticArgs, changes, kind, moduleSpecifier) {
+                return {
+                    description: ts.formatMessage.apply(undefined, [undefined, description].concat(diagnosticArgs)),
+                    changes: changes,
+                    kind: kind,
+                    moduleSpecifier: moduleSpecifier
+                };
+            }
+        }
+    })(codefix = ts.codefix || (ts.codefix = {}));
+})(ts || (ts = {}));
+/* @internal */
+var ts;
+(function (ts) {
+    var codefix;
+    (function (codefix) {
+        codefix.registerCodeFix({
+            errorCodes: getApplicableDiagnosticCodes(),
+            getCodeActions: getDisableJsDiagnosticsCodeActions
+        });
+        function getApplicableDiagnosticCodes() {
+            var allDiagnostcs = ts.Diagnostics;
+            return Object.keys(allDiagnostcs)
+                .filter(function (d) { return allDiagnostcs[d] && allDiagnostcs[d].category === ts.DiagnosticCategory.Error; })
+                .map(function (d) { return allDiagnostcs[d].code; });
+        }
+        function getIgnoreCommentLocationForLocation(sourceFile, position, newLineCharacter) {
+            var line = ts.getLineAndCharacterOfPosition(sourceFile, position).line;
+            var lineStartPosition = ts.getStartPositionOfLine(line, sourceFile);
+            var startPosition = ts.getFirstNonSpaceCharacterPosition(sourceFile.text, lineStartPosition);
+            // First try to see if we can put the '// @ts-ignore' on the previous line.
+            // We need to make sure that we are not in the middle of a string literal or a comment.
+            // We also want to check if the previous line holds a comment for a node on the next line
+            // if so, we do not want to separate the node from its comment if we can.
+            if (!ts.isInComment(sourceFile, startPosition) && !ts.isInString(sourceFile, startPosition) && !ts.isInTemplateString(sourceFile, startPosition)) {
+                var token = ts.getTouchingToken(sourceFile, startPosition, /*includeJsDocComment*/ false);
+                var tokenLeadingCommnets = ts.getLeadingCommentRangesOfNode(token, sourceFile);
+                if (!tokenLeadingCommnets || !tokenLeadingCommnets.length || tokenLeadingCommnets[0].pos >= startPosition) {
+                    return {
+                        span: { start: startPosition, length: 0 },
+                        newText: "// @ts-ignore" + newLineCharacter
+                    };
                 }
-                return getIndentationForNodeWorker(current, currentStart, /*ignoreActualIndentationRange*/ undefined, indentationDelta, sourceFile, options);
             }
-            SmartIndenter.getIndentation = getIndentation;
-            function getIndentationForNode(n, ignoreActualIndentationRange, sourceFile, options) {
-                var start = sourceFile.getLineAndCharacterOfPosition(n.getStart(sourceFile));
-                return getIndentationForNodeWorker(n, start, ignoreActualIndentationRange, /*indentationDelta*/ 0, sourceFile, options);
+            // If all fails, add an extra new line immediatlly before the error span.
+            return {
+                span: { start: position, length: 0 },
+                newText: (position === startPosition ? "" : newLineCharacter) + "// @ts-ignore" + newLineCharacter
+            };
+        }
+        function getDisableJsDiagnosticsCodeActions(context) {
+            var sourceFile = context.sourceFile, program = context.program, newLineCharacter = context.newLineCharacter, span = context.span;
+            if (!ts.isInJavaScriptFile(sourceFile) || !ts.isCheckJsEnabledForFile(sourceFile, program.getCompilerOptions())) {
+                return undefined;
             }
-            SmartIndenter.getIndentationForNode = getIndentationForNode;
-            function getBaseIndentation(options) {
-                return options.baseIndentSize || 0;
+            return [{
+                    description: ts.getLocaleSpecificMessage(ts.Diagnostics.Ignore_this_error_message),
+                    changes: [{
+                            fileName: sourceFile.fileName,
+                            textChanges: [getIgnoreCommentLocationForLocation(sourceFile, span.start, newLineCharacter)]
+                        }]
+                },
+                {
+                    description: ts.getLocaleSpecificMessage(ts.Diagnostics.Disable_checking_for_this_file),
+                    changes: [{
+                            fileName: sourceFile.fileName,
+                            textChanges: [{
+                                    span: {
+                                        start: sourceFile.checkJsDirective ? sourceFile.checkJsDirective.pos : 0,
+                                        length: sourceFile.checkJsDirective ? sourceFile.checkJsDirective.end - sourceFile.checkJsDirective.pos : 0
+                                    },
+                                    newText: "// @ts-nocheck" + newLineCharacter
+                                }]
+                        }]
+                }];
+        }
+    })(codefix = ts.codefix || (ts.codefix = {}));
+})(ts || (ts = {}));
+/* @internal */
+var ts;
+(function (ts) {
+    var codefix;
+    (function (codefix) {
+        function newNodesToChanges(newNodes, insertAfter, context) {
+            var sourceFile = context.sourceFile;
+            var changeTracker = ts.textChanges.ChangeTracker.fromCodeFixContext(context);
+            for (var _i = 0, newNodes_1 = newNodes; _i < newNodes_1.length; _i++) {
+                var newNode = newNodes_1[_i];
+                changeTracker.insertNodeAfter(sourceFile, insertAfter, newNode, { suffix: context.newLineCharacter });
+            }
+            var changes = changeTracker.getChanges();
+            if (!ts.some(changes)) {
+                return changes;
+            }
+            ts.Debug.assert(changes.length === 1);
+            var consolidatedChanges = [{
+                    fileName: changes[0].fileName,
+                    textChanges: [{
+                            span: changes[0].textChanges[0].span,
+                            newText: changes[0].textChanges.reduce(function (prev, cur) { return prev + cur.newText; }, "")
+                        }]
+                }];
+            return consolidatedChanges;
+        }
+        codefix.newNodesToChanges = newNodesToChanges;
+        /**
+         * Finds members of the resolved type that are missing in the class pointed to by class decl
+         * and generates source code for the missing members.
+         * @param possiblyMissingSymbols The collection of symbols to filter and then get insertions for.
+         * @returns Empty string iff there are no member insertions.
+         */
+        function createMissingMemberNodes(classDeclaration, possiblyMissingSymbols, checker) {
+            var classMembers = classDeclaration.symbol.members;
+            var missingMembers = possiblyMissingSymbols.filter(function (symbol) { return !classMembers.has(symbol.getName()); });
+            var newNodes = [];
+            for (var _i = 0, missingMembers_1 = missingMembers; _i < missingMembers_1.length; _i++) {
+                var symbol = missingMembers_1[_i];
+                var newNode = createNewNodeForMemberSymbol(symbol, classDeclaration, checker);
+                if (newNode) {
+                    if (Array.isArray(newNode)) {
+                        newNodes = newNodes.concat(newNode);
+                    }
+                    else {
+                        newNodes.push(newNode);
+                    }
+                }
             }
-            SmartIndenter.getBaseIndentation = getBaseIndentation;
-            function getIndentationForNodeWorker(current, currentStart, ignoreActualIndentationRange, indentationDelta, sourceFile, options) {
-                var parent = current.parent;
-                var parentStart;
-                // walk upwards and collect indentations for pairs of parent-child nodes
-                // indentation is not added if parent and child nodes start on the same line or if parent is IfStatement and child starts on the same line with 'else clause'
-                while (parent) {
-                    var useActualIndentation = true;
-                    if (ignoreActualIndentationRange) {
-                        var start = current.getStart(sourceFile);
-                        useActualIndentation = start < ignoreActualIndentationRange.pos || start > ignoreActualIndentationRange.end;
+            return newNodes;
+        }
+        codefix.createMissingMemberNodes = createMissingMemberNodes;
+        /**
+         * @returns Empty string iff there we can't figure out a representation for `symbol` in `enclosingDeclaration`.
+         */
+        function createNewNodeForMemberSymbol(symbol, enclosingDeclaration, checker) {
+            var declarations = symbol.getDeclarations();
+            if (!(declarations && declarations.length)) {
+                return undefined;
+            }
+            var declaration = declarations[0];
+            // Clone name to remove leading trivia.
+            var name = ts.getSynthesizedClone(ts.getNameOfDeclaration(declaration));
+            var visibilityModifier = createVisibilityModifier(ts.getModifierFlags(declaration));
+            var modifiers = visibilityModifier ? ts.createNodeArray([visibilityModifier]) : undefined;
+            var type = checker.getWidenedType(checker.getTypeOfSymbolAtLocation(symbol, enclosingDeclaration));
+            var optional = !!(symbol.flags & 67108864 /* Optional */);
+            switch (declaration.kind) {
+                case 153 /* GetAccessor */:
+                case 154 /* SetAccessor */:
+                case 148 /* PropertySignature */:
+                case 149 /* PropertyDeclaration */:
+                    var typeNode = checker.typeToTypeNode(type, enclosingDeclaration);
+                    var property = ts.createProperty(
+                    /*decorators*/ undefined, modifiers, name, optional ? ts.createToken(55 /* QuestionToken */) : undefined, typeNode, 
+                    /*initializer*/ undefined);
+                    return property;
+                case 150 /* MethodSignature */:
+                case 151 /* MethodDeclaration */:
+                    // The signature for the implementation appears as an entry in `signatures` iff
+                    // there is only one signature.
+                    // If there are overloads and an implementation signature, it appears as an
+                    // extra declaration that isn't a signature for `type`.
+                    // If there is more than one overload but no implementation signature
+                    // (eg: an abstract method or interface declaration), there is a 1-1
+                    // correspondence of declarations and signatures.
+                    var signatures = checker.getSignaturesOfType(type, 0 /* Call */);
+                    if (!ts.some(signatures)) {
+                        return undefined;
                     }
-                    if (useActualIndentation) {
-                        // check if current node is a list item - if yes, take indentation from it
-                        var actualIndentation = getActualIndentationForListItem(current, sourceFile, options);
-                        if (actualIndentation !== -1 /* Unknown */) {
-                            return actualIndentation + indentationDelta;
-                        }
+                    if (declarations.length === 1) {
+                        ts.Debug.assert(signatures.length === 1);
+                        var signature = signatures[0];
+                        return signatureToMethodDeclaration(signature, enclosingDeclaration, createStubbedMethodBody());
                     }
-                    parentStart = getParentStart(parent, current, sourceFile);
-                    var parentAndChildShareLine = parentStart.line === currentStart.line ||
-                        childStartsOnTheSameLineWithElseInIfStatement(parent, current, currentStart.line, sourceFile);
-                    if (useActualIndentation) {
-                        // try to fetch actual indentation for current node from source text
-                        var actualIndentation = getActualIndentationForNode(current, parent, currentStart, parentAndChildShareLine, sourceFile, options);
-                        if (actualIndentation !== -1 /* Unknown */) {
-                            return actualIndentation + indentationDelta;
+                    var signatureDeclarations = [];
+                    for (var i = 0; i < signatures.length; i++) {
+                        var signature = signatures[i];
+                        var methodDeclaration = signatureToMethodDeclaration(signature, enclosingDeclaration);
+                        if (methodDeclaration) {
+                            signatureDeclarations.push(methodDeclaration);
                         }
-                        actualIndentation = getLineIndentationWhenExpressionIsInMultiLine(current, sourceFile, options);
-                        if (actualIndentation !== -1 /* Unknown */) {
-                            return actualIndentation + indentationDelta;
+                    }
+                    if (declarations.length > signatures.length) {
+                        var signature = checker.getSignatureFromDeclaration(declarations[declarations.length - 1]);
+                        var methodDeclaration = signatureToMethodDeclaration(signature, enclosingDeclaration, createStubbedMethodBody());
+                        if (methodDeclaration) {
+                            signatureDeclarations.push(methodDeclaration);
                         }
                     }
-                    // increase indentation if parent node wants its content to be indented and parent and child nodes don't start on the same line
-                    if (shouldIndentChildNode(parent, current) && !parentAndChildShareLine) {
-                        indentationDelta += options.indentSize;
+                    else {
+                        ts.Debug.assert(declarations.length === signatures.length);
+                        var methodImplementingSignatures = createMethodImplementingSignatures(signatures, name, optional, modifiers);
+                        signatureDeclarations.push(methodImplementingSignatures);
                     }
-                    current = parent;
-                    currentStart = parentStart;
-                    parent = current.parent;
-                }
-                return indentationDelta + getBaseIndentation(options);
+                    return signatureDeclarations;
+                default:
+                    return undefined;
             }
-            function getParentStart(parent, child, sourceFile) {
-                var containingList = getContainingList(child, sourceFile);
-                if (containingList) {
-                    return sourceFile.getLineAndCharacterOfPosition(containingList.pos);
+            function signatureToMethodDeclaration(signature, enclosingDeclaration, body) {
+                var signatureDeclaration = checker.signatureToSignatureDeclaration(signature, 151 /* MethodDeclaration */, enclosingDeclaration, ts.NodeBuilderFlags.SuppressAnyReturnType);
+                if (signatureDeclaration) {
+                    signatureDeclaration.decorators = undefined;
+                    signatureDeclaration.modifiers = modifiers;
+                    signatureDeclaration.name = name;
+                    signatureDeclaration.questionToken = optional ? ts.createToken(55 /* QuestionToken */) : undefined;
+                    signatureDeclaration.body = body;
                 }
-                return sourceFile.getLineAndCharacterOfPosition(parent.getStart(sourceFile));
+                return signatureDeclaration;
             }
-            /*
-             * Function returns Value.Unknown if indentation cannot be determined
-             */
-            function getActualIndentationForListItemBeforeComma(commaToken, sourceFile, options) {
-                // previous token is comma that separates items in list - find the previous item and try to derive indentation from it
-                var commaItemInfo = ts.findListItemInfo(commaToken);
-                if (commaItemInfo && commaItemInfo.listItemIndex > 0) {
-                    return deriveActualIndentationFromList(commaItemInfo.list.getChildren(), commaItemInfo.listItemIndex - 1, sourceFile, options);
-                }
-                else {
-                    // handle broken code gracefully
-                    return -1 /* Unknown */;
+        }
+        function createMethodFromCallExpression(callExpression, methodName, includeTypeScriptSyntax, makeStatic) {
+            var parameters = createDummyParameters(callExpression.arguments.length, /*names*/ undefined, /*minArgumentCount*/ undefined, includeTypeScriptSyntax);
+            var typeParameters;
+            if (includeTypeScriptSyntax) {
+                var typeArgCount = ts.length(callExpression.typeArguments);
+                for (var i = 0; i < typeArgCount; i++) {
+                    var name_70 = typeArgCount < 8 ? String.fromCharCode(84 /* T */ + i) : "T" + i;
+                    var typeParameter = ts.createTypeParameterDeclaration(name_70, /*constraint*/ undefined, /*defaultType*/ undefined);
+                    (typeParameters ? typeParameters : typeParameters = []).push(typeParameter);
                 }
             }
-            /*
-             * Function returns Value.Unknown if actual indentation for node should not be used (i.e because node is nested expression)
+            var newMethod = ts.createMethod(
+            /*decorators*/ undefined, 
+            /*modifiers*/ makeStatic ? [ts.createToken(115 /* StaticKeyword */)] : undefined, 
+            /*asteriskToken*/ undefined, methodName, 
+            /*questionToken*/ undefined, typeParameters, parameters, 
+            /*type*/ includeTypeScriptSyntax ? ts.createKeywordTypeNode(119 /* AnyKeyword */) : undefined, createStubbedMethodBody());
+            return newMethod;
+        }
+        codefix.createMethodFromCallExpression = createMethodFromCallExpression;
+        function createDummyParameters(argCount, names, minArgumentCount, addAnyType) {
+            var parameters = [];
+            for (var i = 0; i < argCount; i++) {
+                var newParameter = ts.createParameter(
+                /*decorators*/ undefined, 
+                /*modifiers*/ undefined, 
+                /*dotDotDotToken*/ undefined, 
+                /*name*/ names && names[i] || "arg" + i, 
+                /*questionToken*/ minArgumentCount !== undefined && i >= minArgumentCount ? ts.createToken(55 /* QuestionToken */) : undefined, 
+                /*type*/ addAnyType ? ts.createKeywordTypeNode(119 /* AnyKeyword */) : undefined, 
+                /*initializer*/ undefined);
+                parameters.push(newParameter);
+            }
+            return parameters;
+        }
+        function createMethodImplementingSignatures(signatures, name, optional, modifiers) {
+            /** This is *a* signature with the maximal number of arguments,
+             * such that if there is a "maximal" signature without rest arguments,
+             * this is one of them.
              */
-            function getActualIndentationForNode(current, parent, currentLineAndChar, parentAndChildShareLine, sourceFile, options) {
-                // actual indentation is used for statements\declarations if one of cases below is true:
-                // - parent is SourceFile - by default immediate children of SourceFile are not indented except when user indents them manually
-                // - parent and child are not on the same line
-                var useActualIndentation = (ts.isDeclaration(current) || ts.isStatementButNotDeclaration(current)) &&
-                    (parent.kind === 256 /* SourceFile */ || !parentAndChildShareLine);
-                if (!useActualIndentation) {
-                    return -1 /* Unknown */;
-                }
-                return findColumnForFirstNonWhitespaceCharacterInLine(currentLineAndChar, sourceFile, options);
-            }
-            function nextTokenIsCurlyBraceOnSameLineAsCursor(precedingToken, current, lineAtPosition, sourceFile) {
-                var nextToken = ts.findNextToken(precedingToken, current);
-                if (!nextToken) {
-                    return false;
-                }
-                if (nextToken.kind === 15 /* OpenBraceToken */) {
-                    // open braces are always indented at the parent level
-                    return true;
-                }
-                else if (nextToken.kind === 16 /* CloseBraceToken */) {
-                    // close braces are indented at the parent level if they are located on the same line with cursor
-                    // this means that if new line will be added at $ position, this case will be indented
-                    // class A {
-                    //    $
-                    // }
-                    /// and this one - not
-                    // class A {
-                    // $}
-                    var nextTokenStartLine = getStartLineAndCharacterForNode(nextToken, sourceFile).line;
-                    return lineAtPosition === nextTokenStartLine;
-                }
-                return false;
-            }
-            function getStartLineAndCharacterForNode(n, sourceFile) {
-                return sourceFile.getLineAndCharacterOfPosition(n.getStart(sourceFile));
+            var maxArgsSignature = signatures[0];
+            var minArgumentCount = signatures[0].minArgumentCount;
+            var someSigHasRestParameter = false;
+            for (var i = 0; i < signatures.length; i++) {
+                var sig = signatures[i];
+                minArgumentCount = Math.min(sig.minArgumentCount, minArgumentCount);
+                if (sig.hasRestParameter) {
+                    someSigHasRestParameter = true;
+                }
+                if (sig.parameters.length >= maxArgsSignature.parameters.length && (!sig.hasRestParameter || maxArgsSignature.hasRestParameter)) {
+                    maxArgsSignature = sig;
+                }
+            }
+            var maxNonRestArgs = maxArgsSignature.parameters.length - (maxArgsSignature.hasRestParameter ? 1 : 0);
+            var maxArgsParameterSymbolNames = maxArgsSignature.parameters.map(function (symbol) { return symbol.getName(); });
+            var parameters = createDummyParameters(maxNonRestArgs, maxArgsParameterSymbolNames, minArgumentCount, /*addAnyType*/ true);
+            if (someSigHasRestParameter) {
+                var anyArrayType = ts.createArrayTypeNode(ts.createKeywordTypeNode(119 /* AnyKeyword */));
+                var restParameter = ts.createParameter(
+                /*decorators*/ undefined, 
+                /*modifiers*/ undefined, ts.createToken(24 /* DotDotDotToken */), maxArgsParameterSymbolNames[maxNonRestArgs] || "rest", 
+                /*questionToken*/ maxNonRestArgs >= minArgumentCount ? ts.createToken(55 /* QuestionToken */) : undefined, anyArrayType, 
+                /*initializer*/ undefined);
+                parameters.push(restParameter);
+            }
+            return createStubbedMethod(modifiers, name, optional, 
+            /*typeParameters*/ undefined, parameters, 
+            /*returnType*/ undefined);
+        }
+        function createStubbedMethod(modifiers, name, optional, typeParameters, parameters, returnType) {
+            return ts.createMethod(
+            /*decorators*/ undefined, modifiers, 
+            /*asteriskToken*/ undefined, name, optional ? ts.createToken(55 /* QuestionToken */) : undefined, typeParameters, parameters, returnType, createStubbedMethodBody());
+        }
+        codefix.createStubbedMethod = createStubbedMethod;
+        function createStubbedMethodBody() {
+            return ts.createBlock([ts.createThrow(ts.createNew(ts.createIdentifier("Error"), 
+                /*typeArguments*/ undefined, [ts.createLiteral("Method not implemented.")]))], 
+            /*multiline*/ true);
+        }
+        function createVisibilityModifier(flags) {
+            if (flags & 4 /* Public */) {
+                return ts.createToken(114 /* PublicKeyword */);
             }
-            function childStartsOnTheSameLineWithElseInIfStatement(parent, child, childStartLine, sourceFile) {
-                if (parent.kind === 203 /* IfStatement */ && parent.elseStatement === child) {
-                    var elseKeyword = ts.findChildOfKind(parent, 80 /* ElseKeyword */, sourceFile);
-                    ts.Debug.assert(elseKeyword !== undefined);
-                    var elseKeywordStartLine = getStartLineAndCharacterForNode(elseKeyword, sourceFile).line;
-                    return elseKeywordStartLine === childStartLine;
-                }
-                return false;
+            else if (flags & 16 /* Protected */) {
+                return ts.createToken(113 /* ProtectedKeyword */);
             }
-            SmartIndenter.childStartsOnTheSameLineWithElseInIfStatement = childStartsOnTheSameLineWithElseInIfStatement;
-            function getContainingList(node, sourceFile) {
-                if (node.parent) {
-                    switch (node.parent.kind) {
-                        case 155 /* TypeReference */:
-                            if (node.parent.typeArguments &&
-                                ts.rangeContainsStartEnd(node.parent.typeArguments, node.getStart(sourceFile), node.getEnd())) {
-                                return node.parent.typeArguments;
-                            }
-                            break;
-                        case 171 /* ObjectLiteralExpression */:
-                            return node.parent.properties;
-                        case 170 /* ArrayLiteralExpression */:
-                            return node.parent.elements;
-                        case 220 /* FunctionDeclaration */:
-                        case 179 /* FunctionExpression */:
-                        case 180 /* ArrowFunction */:
-                        case 147 /* MethodDeclaration */:
-                        case 146 /* MethodSignature */:
-                        case 151 /* CallSignature */:
-                        case 152 /* ConstructSignature */: {
-                            var start = node.getStart(sourceFile);
-                            if (node.parent.typeParameters &&
-                                ts.rangeContainsStartEnd(node.parent.typeParameters, start, node.getEnd())) {
-                                return node.parent.typeParameters;
-                            }
-                            if (ts.rangeContainsStartEnd(node.parent.parameters, start, node.getEnd())) {
-                                return node.parent.parameters;
-                            }
-                            break;
-                        }
-                        case 175 /* NewExpression */:
-                        case 174 /* CallExpression */: {
-                            var start = node.getStart(sourceFile);
-                            if (node.parent.typeArguments &&
-                                ts.rangeContainsStartEnd(node.parent.typeArguments, start, node.getEnd())) {
-                                return node.parent.typeArguments;
-                            }
-                            if (node.parent.arguments &&
-                                ts.rangeContainsStartEnd(node.parent.arguments, start, node.getEnd())) {
-                                return node.parent.arguments;
+            return undefined;
+        }
+    })(codefix = ts.codefix || (ts.codefix = {}));
+})(ts || (ts = {}));
+/// <reference path="fixClassIncorrectlyImplementsInterface.ts" />
+/// <reference path="fixAddMissingMember.ts" />
+/// <reference path="fixSpelling.ts" />
+/// <reference path="fixClassDoesntImplementInheritedAbstractMember.ts" />
+/// <reference path="fixClassSuperMustPrecedeThisAccess.ts" />
+/// <reference path="fixConstructorForDerivedNeedSuperCall.ts" />
+/// <reference path="fixExtendsInterfaceBecomesImplements.ts" />
+/// <reference path="fixForgottenThisPropertyAccess.ts" />
+/// <reference path='fixUnusedIdentifier.ts' />
+/// <reference path='importFixes.ts' />
+/// <reference path='disableJsDiagnostics.ts' />
+/// <reference path='helpers.ts' />
+/* @internal */
+var ts;
+(function (ts) {
+    var refactor;
+    (function (refactor) {
+        var actionName = "convert";
+        var convertFunctionToES6Class = {
+            name: "Convert to ES2015 class",
+            description: ts.Diagnostics.Convert_function_to_an_ES2015_class.message,
+            getEditsForAction: getEditsForAction,
+            getAvailableActions: getAvailableActions
+        };
+        refactor.registerRefactor(convertFunctionToES6Class);
+        function getAvailableActions(context) {
+            var start = context.startPosition;
+            var node = ts.getTokenAtPosition(context.file, start, /*includeJsDocComment*/ false);
+            var checker = context.program.getTypeChecker();
+            var symbol = checker.getSymbolAtLocation(node);
+            if (symbol && ts.isDeclarationOfFunctionOrClassExpression(symbol)) {
+                symbol = symbol.valueDeclaration.initializer.symbol;
+            }
+            if (symbol && (symbol.flags & 16 /* Function */) && symbol.members && (symbol.members.size > 0)) {
+                return [
+                    {
+                        name: convertFunctionToES6Class.name,
+                        description: convertFunctionToES6Class.description,
+                        actions: [
+                            {
+                                description: convertFunctionToES6Class.description,
+                                name: actionName
                             }
-                            break;
-                        }
+                        ]
                     }
-                }
+                ];
+            }
+        }
+        function getEditsForAction(context, action) {
+            // Somehow wrong action got invoked?
+            if (actionName !== action) {
                 return undefined;
             }
-            function getActualIndentationForListItem(node, sourceFile, options) {
-                var containingList = getContainingList(node, sourceFile);
-                return containingList ? getActualIndentationFromList(containingList) : -1 /* Unknown */;
-                function getActualIndentationFromList(list) {
-                    var index = ts.indexOf(list, node);
-                    return index !== -1 ? deriveActualIndentationFromList(list, index, sourceFile, options) : -1 /* Unknown */;
-                }
+            var start = context.startPosition;
+            var sourceFile = context.file;
+            var checker = context.program.getTypeChecker();
+            var token = ts.getTokenAtPosition(sourceFile, start, /*includeJsDocComment*/ false);
+            var ctorSymbol = checker.getSymbolAtLocation(token);
+            var newLine = context.rulesProvider.getFormatOptions().newLineCharacter;
+            var deletedNodes = [];
+            var deletes = [];
+            if (!(ctorSymbol.flags & (16 /* Function */ | 3 /* Variable */))) {
+                return undefined;
             }
-            function getLineIndentationWhenExpressionIsInMultiLine(node, sourceFile, options) {
-                // actual indentation should not be used when:
-                // - node is close parenthesis - this is the end of the expression
-                if (node.kind === 18 /* CloseParenToken */) {
-                    return -1 /* Unknown */;
-                }
-                if (node.parent && (node.parent.kind === 174 /* CallExpression */ ||
-                    node.parent.kind === 175 /* NewExpression */) &&
-                    node.parent.expression !== node) {
-                    var fullCallOrNewExpression = node.parent.expression;
-                    var startingExpression = getStartingExpression(fullCallOrNewExpression);
-                    if (fullCallOrNewExpression === startingExpression) {
-                        return -1 /* Unknown */;
+            var ctorDeclaration = ctorSymbol.valueDeclaration;
+            var changeTracker = ts.textChanges.ChangeTracker.fromCodeFixContext(context);
+            var precedingNode;
+            var newClassDeclaration;
+            switch (ctorDeclaration.kind) {
+                case 228 /* FunctionDeclaration */:
+                    precedingNode = ctorDeclaration;
+                    deleteNode(ctorDeclaration);
+                    newClassDeclaration = createClassFromFunctionDeclaration(ctorDeclaration);
+                    break;
+                case 226 /* VariableDeclaration */:
+                    precedingNode = ctorDeclaration.parent.parent;
+                    if (ctorDeclaration.parent.declarations.length === 1) {
+                        deleteNode(precedingNode);
                     }
-                    var fullCallOrNewExpressionEnd = sourceFile.getLineAndCharacterOfPosition(fullCallOrNewExpression.end);
-                    var startingExpressionEnd = sourceFile.getLineAndCharacterOfPosition(startingExpression.end);
-                    if (fullCallOrNewExpressionEnd.line === startingExpressionEnd.line) {
-                        return -1 /* Unknown */;
+                    else {
+                        deleteNode(ctorDeclaration, /*inList*/ true);
                     }
-                    return findColumnForFirstNonWhitespaceCharacterInLine(fullCallOrNewExpressionEnd, sourceFile, options);
+                    newClassDeclaration = createClassFromVariableDeclaration(ctorDeclaration);
+                    break;
+            }
+            if (!newClassDeclaration) {
+                return undefined;
+            }
+            // Because the preceding node could be touched, we need to insert nodes before delete nodes.
+            changeTracker.insertNodeAfter(sourceFile, precedingNode, newClassDeclaration, { suffix: newLine });
+            for (var _i = 0, deletes_1 = deletes; _i < deletes_1.length; _i++) {
+                var deleteCallback = deletes_1[_i];
+                deleteCallback();
+            }
+            return {
+                edits: changeTracker.getChanges()
+            };
+            function deleteNode(node, inList) {
+                if (inList === void 0) { inList = false; }
+                if (deletedNodes.some(function (n) { return ts.isNodeDescendantOf(node, n); })) {
+                    // Parent node has already been deleted; do nothing
+                    return;
                 }
-                return -1 /* Unknown */;
-                function getStartingExpression(node) {
-                    while (true) {
-                        switch (node.kind) {
-                            case 174 /* CallExpression */:
-                            case 175 /* NewExpression */:
-                            case 172 /* PropertyAccessExpression */:
-                            case 173 /* ElementAccessExpression */:
-                                node = node.expression;
-                                break;
-                            default:
-                                return node;
-                        }
-                    }
+                deletedNodes.push(node);
+                if (inList) {
+                    deletes.push(function () { return changeTracker.deleteNodeInList(sourceFile, node); });
                 }
-            }
-            function deriveActualIndentationFromList(list, index, sourceFile, options) {
-                ts.Debug.assert(index >= 0 && index < list.length);
-                var node = list[index];
-                // walk toward the start of the list starting from current node and check if the line is the same for all items.
-                // if end line for item [i - 1] differs from the start line for item [i] - find column of the first non-whitespace character on the line of item [i]
-                var lineAndCharacter = getStartLineAndCharacterForNode(node, sourceFile);
-                for (var i = index - 1; i >= 0; i--) {
-                    if (list[i].kind === 24 /* CommaToken */) {
-                        continue;
-                    }
-                    // skip list items that ends on the same line with the current list element
-                    var prevEndLine = sourceFile.getLineAndCharacterOfPosition(list[i].end).line;
-                    if (prevEndLine !== lineAndCharacter.line) {
-                        return findColumnForFirstNonWhitespaceCharacterInLine(lineAndCharacter, sourceFile, options);
-                    }
-                    lineAndCharacter = getStartLineAndCharacterForNode(list[i], sourceFile);
+                else {
+                    deletes.push(function () { return changeTracker.deleteNode(sourceFile, node); });
                 }
-                return -1 /* Unknown */;
-            }
-            function findColumnForFirstNonWhitespaceCharacterInLine(lineAndCharacter, sourceFile, options) {
-                var lineStart = sourceFile.getPositionOfLineAndCharacter(lineAndCharacter.line, 0);
-                return findFirstNonWhitespaceColumn(lineStart, lineStart + lineAndCharacter.character, sourceFile, options);
             }
-            /*
-                Character is the actual index of the character since the beginning of the line.
-                Column - position of the character after expanding tabs to spaces
-                "0\t2$"
-                value of 'character' for '$' is 3
-                value of 'column' for '$' is 6 (assuming that tab size is 4)
-            */
-            function findFirstNonWhitespaceCharacterAndColumn(startPos, endPos, sourceFile, options) {
-                var character = 0;
-                var column = 0;
-                for (var pos = startPos; pos < endPos; pos++) {
-                    var ch = sourceFile.text.charCodeAt(pos);
-                    if (!ts.isWhiteSpaceSingleLine(ch)) {
-                        break;
+            function createClassElementsFromSymbol(symbol) {
+                var memberElements = [];
+                // all instance members are stored in the "member" array of symbol
+                if (symbol.members) {
+                    symbol.members.forEach(function (member) {
+                        var memberElement = createClassElement(member, /*modifiers*/ undefined);
+                        if (memberElement) {
+                            memberElements.push(memberElement);
+                        }
+                    });
+                }
+                // all static members are stored in the "exports" array of symbol
+                if (symbol.exports) {
+                    symbol.exports.forEach(function (member) {
+                        var memberElement = createClassElement(member, [ts.createToken(115 /* StaticKeyword */)]);
+                        if (memberElement) {
+                            memberElements.push(memberElement);
+                        }
+                    });
+                }
+                return memberElements;
+                function shouldConvertDeclaration(_target, source) {
+                    // Right now the only thing we can convert are function expressions - other values shouldn't get
+                    // transformed. We can update this once ES public class properties are available.
+                    return ts.isFunctionLike(source);
+                }
+                function createClassElement(symbol, modifiers) {
+                    // both properties and methods are bound as property symbols
+                    if (!(symbol.flags & 4 /* Property */)) {
+                        return;
                     }
-                    if (ch === 9 /* tab */) {
-                        column += options.tabSize + (column % options.tabSize);
+                    var memberDeclaration = symbol.valueDeclaration;
+                    var assignmentBinaryExpression = memberDeclaration.parent;
+                    if (!shouldConvertDeclaration(memberDeclaration, assignmentBinaryExpression.right)) {
+                        return;
                     }
-                    else {
-                        column++;
+                    // delete the entire statement if this expression is the sole expression to take care of the semicolon at the end
+                    var nodeToDelete = assignmentBinaryExpression.parent && assignmentBinaryExpression.parent.kind === 210 /* ExpressionStatement */
+                        ? assignmentBinaryExpression.parent : assignmentBinaryExpression;
+                    deleteNode(nodeToDelete);
+                    if (!assignmentBinaryExpression.right) {
+                        return ts.createProperty([], modifiers, symbol.name, /*questionToken*/ undefined, 
+                        /*type*/ undefined, /*initializer*/ undefined);
+                    }
+                    switch (assignmentBinaryExpression.right.kind) {
+                        case 186 /* FunctionExpression */:
+                            var functionExpression = assignmentBinaryExpression.right;
+                            return ts.createMethod(/*decorators*/ undefined, modifiers, /*asteriskToken*/ undefined, memberDeclaration.name, /*questionToken*/ undefined, 
+                            /*typeParameters*/ undefined, functionExpression.parameters, /*type*/ undefined, functionExpression.body);
+                        case 187 /* ArrowFunction */:
+                            var arrowFunction = assignmentBinaryExpression.right;
+                            var arrowFunctionBody = arrowFunction.body;
+                            var bodyBlock = void 0;
+                            // case 1: () => { return [1,2,3] }
+                            if (arrowFunctionBody.kind === 207 /* Block */) {
+                                bodyBlock = arrowFunctionBody;
+                            }
+                            else {
+                                var expression = arrowFunctionBody;
+                                bodyBlock = ts.createBlock([ts.createReturn(expression)]);
+                            }
+                            return ts.createMethod(/*decorators*/ undefined, modifiers, /*asteriskToken*/ undefined, memberDeclaration.name, /*questionToken*/ undefined, 
+                            /*typeParameters*/ undefined, arrowFunction.parameters, /*type*/ undefined, bodyBlock);
+                        default:
+                            // Don't try to declare members in JavaScript files
+                            if (ts.isSourceFileJavaScript(sourceFile)) {
+                                return;
+                            }
+                            return ts.createProperty(/*decorators*/ undefined, modifiers, memberDeclaration.name, /*questionToken*/ undefined, 
+                            /*type*/ undefined, assignmentBinaryExpression.right);
                     }
-                    character++;
                 }
-                return { column: column, character: character };
-            }
-            SmartIndenter.findFirstNonWhitespaceCharacterAndColumn = findFirstNonWhitespaceCharacterAndColumn;
-            function findFirstNonWhitespaceColumn(startPos, endPos, sourceFile, options) {
-                return findFirstNonWhitespaceCharacterAndColumn(startPos, endPos, sourceFile, options).column;
             }
-            SmartIndenter.findFirstNonWhitespaceColumn = findFirstNonWhitespaceColumn;
-            function nodeContentIsAlwaysIndented(kind) {
-                switch (kind) {
-                    case 202 /* ExpressionStatement */:
-                    case 221 /* ClassDeclaration */:
-                    case 192 /* ClassExpression */:
-                    case 222 /* InterfaceDeclaration */:
-                    case 224 /* EnumDeclaration */:
-                    case 223 /* TypeAliasDeclaration */:
-                    case 170 /* ArrayLiteralExpression */:
-                    case 199 /* Block */:
-                    case 226 /* ModuleBlock */:
-                    case 171 /* ObjectLiteralExpression */:
-                    case 159 /* TypeLiteral */:
-                    case 161 /* TupleType */:
-                    case 227 /* CaseBlock */:
-                    case 250 /* DefaultClause */:
-                    case 249 /* CaseClause */:
-                    case 178 /* ParenthesizedExpression */:
-                    case 172 /* PropertyAccessExpression */:
-                    case 174 /* CallExpression */:
-                    case 175 /* NewExpression */:
-                    case 200 /* VariableStatement */:
-                    case 218 /* VariableDeclaration */:
-                    case 235 /* ExportAssignment */:
-                    case 211 /* ReturnStatement */:
-                    case 188 /* ConditionalExpression */:
-                    case 168 /* ArrayBindingPattern */:
-                    case 167 /* ObjectBindingPattern */:
-                    case 243 /* JsxOpeningElement */:
-                    case 242 /* JsxSelfClosingElement */:
-                    case 248 /* JsxExpression */:
-                    case 146 /* MethodSignature */:
-                    case 151 /* CallSignature */:
-                    case 152 /* ConstructSignature */:
-                    case 142 /* Parameter */:
-                    case 156 /* FunctionType */:
-                    case 157 /* ConstructorType */:
-                    case 164 /* ParenthesizedType */:
-                    case 176 /* TaggedTemplateExpression */:
-                    case 184 /* AwaitExpression */:
-                    case 237 /* NamedExports */:
-                    case 233 /* NamedImports */:
-                    case 238 /* ExportSpecifier */:
-                    case 234 /* ImportSpecifier */:
-                        return true;
+            function createClassFromVariableDeclaration(node) {
+                var initializer = node.initializer;
+                if (!initializer || initializer.kind !== 186 /* FunctionExpression */) {
+                    return undefined;
                 }
-                return false;
-            }
-            /* @internal */
-            function nodeWillIndentChild(parent, child, indentByDefault) {
-                var childKind = child ? child.kind : 0 /* Unknown */;
-                switch (parent.kind) {
-                    case 204 /* DoStatement */:
-                    case 205 /* WhileStatement */:
-                    case 207 /* ForInStatement */:
-                    case 208 /* ForOfStatement */:
-                    case 206 /* ForStatement */:
-                    case 203 /* IfStatement */:
-                    case 220 /* FunctionDeclaration */:
-                    case 179 /* FunctionExpression */:
-                    case 147 /* MethodDeclaration */:
-                    case 180 /* ArrowFunction */:
-                    case 148 /* Constructor */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                        return childKind !== 199 /* Block */;
-                    case 236 /* ExportDeclaration */:
-                        return childKind !== 237 /* NamedExports */;
-                    case 230 /* ImportDeclaration */:
-                        return childKind !== 231 /* ImportClause */ ||
-                            (child.namedBindings && child.namedBindings.kind !== 233 /* NamedImports */);
-                    case 241 /* JsxElement */:
-                        return childKind !== 245 /* JsxClosingElement */;
+                if (node.name.kind !== 71 /* Identifier */) {
+                    return undefined;
                 }
-                // No explicit rule for given nodes so the result will follow the default value argument
-                return indentByDefault;
+                var memberElements = createClassElementsFromSymbol(initializer.symbol);
+                if (initializer.body) {
+                    memberElements.unshift(ts.createConstructor(/*decorators*/ undefined, /*modifiers*/ undefined, initializer.parameters, initializer.body));
+                }
+                return ts.createClassDeclaration(/*decorators*/ undefined, /*modifiers*/ undefined, node.name, 
+                /*typeParameters*/ undefined, /*heritageClauses*/ undefined, memberElements);
             }
-            SmartIndenter.nodeWillIndentChild = nodeWillIndentChild;
-            /*
-            Function returns true when the parent node should indent the given child by an explicit rule
-            */
-            function shouldIndentChildNode(parent, child) {
-                return nodeContentIsAlwaysIndented(parent.kind) || nodeWillIndentChild(parent, child, /*indentByDefault*/ false);
+            function createClassFromFunctionDeclaration(node) {
+                var memberElements = createClassElementsFromSymbol(ctorSymbol);
+                if (node.body) {
+                    memberElements.unshift(ts.createConstructor(/*decorators*/ undefined, /*modifiers*/ undefined, node.parameters, node.body));
+                }
+                return ts.createClassDeclaration(/*decorators*/ undefined, /*modifiers*/ undefined, node.name, 
+                /*typeParameters*/ undefined, /*heritageClauses*/ undefined, memberElements);
             }
-            SmartIndenter.shouldIndentChildNode = shouldIndentChildNode;
-        })(SmartIndenter = formatting.SmartIndenter || (formatting.SmartIndenter = {}));
-    })(formatting = ts.formatting || (ts.formatting = {}));
+        }
+    })(refactor = ts.refactor || (ts.refactor = {}));
 })(ts || (ts = {}));
+/// <reference path="convertFunctionToEs6Class.ts" />
 /// <reference path="..\compiler\program.ts"/>
 /// <reference path="..\compiler\commandLineParser.ts"/>
 /// <reference path='types.ts' />
@@ -73335,7 +89310,6 @@ var ts;
 /// <reference path='documentRegistry.ts' />
 /// <reference path='findAllReferences.ts' />
 /// <reference path='goToDefinition.ts' />
-/// <reference path='goToImplementation.ts' />
 /// <reference path='jsDoc.ts' />
 /// <reference path='jsTyping.ts' />
 /// <reference path='navigateTo.ts' />
@@ -73349,13 +89323,20 @@ var ts;
 /// <reference path='transpile.ts' />
 /// <reference path='formatting\formatting.ts' />
 /// <reference path='formatting\smartIndenter.ts' />
+/// <reference path='textChanges.ts' />
+/// <reference path='codeFixProvider.ts' />
+/// <reference path='refactorProvider.ts' />
+/// <reference path='codefixes\fixes.ts' />
+/// <reference path='refactors\refactors.ts' />
 var ts;
 (function (ts) {
     /** The version of the language service API */
     ts.servicesVersion = "0.5";
+    /* @internal */
+    var ruleProvider;
     function createNode(kind, pos, end, parent) {
-        var node = kind >= 139 /* FirstNode */ ? new NodeObject(kind, pos, end) :
-            kind === 69 /* Identifier */ ? new IdentifierObject(kind, pos, end) :
+        var node = ts.isNodeKind(kind) ? new NodeObject(kind, pos, end) :
+            kind === 71 /* Identifier */ ? new IdentifierObject(71 /* Identifier */, pos, end) :
                 new TokenObject(kind, pos, end);
         node.parent = parent;
         return node;
@@ -73366,7 +89347,6 @@ var ts;
             this.end = end;
             this.flags = 0 /* None */;
             this.transformFlags = undefined;
-            this.excludeTransformFlags = undefined;
             this.parent = undefined;
             this.kind = kind;
         }
@@ -73400,10 +89380,11 @@ var ts;
             }
             return sourceFile.text.substring(this.getStart(sourceFile), this.getEnd());
         };
-        NodeObject.prototype.addSyntheticNodes = function (nodes, pos, end, useJSDocScanner) {
+        NodeObject.prototype.addSyntheticNodes = function (nodes, pos, end) {
             ts.scanner.setTextPos(pos);
             while (pos < end) {
-                var token = useJSDocScanner ? ts.scanner.scanJSDocToken() : ts.scanner.scan();
+                var token = ts.scanner.scan();
+                ts.Debug.assert(token !== 1 /* EndOfFileToken */); // Else it would infinitely loop
                 var textPos = ts.scanner.getTextPos();
                 if (textPos <= end) {
                     nodes.push(createNode(token, pos, textPos, this));
@@ -73413,11 +89394,11 @@ var ts;
             return pos;
         };
         NodeObject.prototype.createSyntaxList = function (nodes) {
-            var list = createNode(286 /* SyntaxList */, nodes.pos, nodes.end, this);
+            var list = createNode(295 /* SyntaxList */, nodes.pos, nodes.end, this);
             list._children = [];
             var pos = nodes.pos;
-            for (var _i = 0, nodes_4 = nodes; _i < nodes_4.length; _i++) {
-                var node = nodes_4[_i];
+            for (var _i = 0, nodes_9 = nodes; _i < nodes_9.length; _i++) {
+                var node = nodes_9[_i];
                 if (pos < node.pos) {
                     pos = this.addSyntheticNodes(list._children, pos, node.pos);
                 }
@@ -73431,47 +89412,49 @@ var ts;
         };
         NodeObject.prototype.createChildren = function (sourceFile) {
             var _this = this;
-            var children;
-            if (this.kind >= 139 /* FirstNode */) {
-                ts.scanner.setText((sourceFile || this.getSourceFile()).text);
-                children = [];
-                var pos_3 = this.pos;
-                var useJSDocScanner_1 = this.kind >= 273 /* FirstJSDocTagNode */ && this.kind <= 285 /* LastJSDocTagNode */;
-                var processNode = function (node) {
-                    var isJSDocTagNode = ts.isJSDocTag(node);
-                    if (!isJSDocTagNode && pos_3 < node.pos) {
-                        pos_3 = _this.addSyntheticNodes(children, pos_3, node.pos, useJSDocScanner_1);
-                    }
-                    children.push(node);
-                    if (!isJSDocTagNode) {
-                        pos_3 = node.end;
-                    }
-                };
-                var processNodes = function (nodes) {
-                    if (pos_3 < nodes.pos) {
-                        pos_3 = _this.addSyntheticNodes(children, pos_3, nodes.pos, useJSDocScanner_1);
-                    }
-                    children.push(_this.createSyntaxList(nodes));
-                    pos_3 = nodes.end;
-                };
-                // jsDocComments need to be the first children
-                if (this.jsDocComments) {
-                    for (var _i = 0, _a = this.jsDocComments; _i < _a.length; _i++) {
-                        var jsDocComment = _a[_i];
-                        processNode(jsDocComment);
-                    }
+            if (!ts.isNodeKind(this.kind)) {
+                this._children = ts.emptyArray;
+                return;
+            }
+            if (ts.isJSDocCommentContainingNode(this)) {
+                /** Don't add trivia for "tokens" since this is in a comment. */
+                var children_3 = [];
+                this.forEachChild(function (child) { children_3.push(child); });
+                this._children = children_3;
+                return;
+            }
+            var children = [];
+            ts.scanner.setText((sourceFile || this.getSourceFile()).text);
+            var pos = this.pos;
+            var processNode = function (node) {
+                pos = _this.addSyntheticNodes(children, pos, node.pos);
+                children.push(node);
+                pos = node.end;
+            };
+            var processNodes = function (nodes) {
+                if (pos < nodes.pos) {
+                    pos = _this.addSyntheticNodes(children, pos, nodes.pos);
                 }
-                // For syntactic classifications, all trivia are classcified together, including jsdoc comments.
-                // For that to work, the jsdoc comments should still be the leading trivia of the first child.
-                // Restoring the scanner position ensures that.
-                pos_3 = this.pos;
-                ts.forEachChild(this, processNode, processNodes);
-                if (pos_3 < this.end) {
-                    this.addSyntheticNodes(children, pos_3, this.end);
+                children.push(_this.createSyntaxList(nodes));
+                pos = nodes.end;
+            };
+            // jsDocComments need to be the first children
+            if (this.jsDoc) {
+                for (var _i = 0, _a = this.jsDoc; _i < _a.length; _i++) {
+                    var jsDocComment = _a[_i];
+                    processNode(jsDocComment);
                 }
-                ts.scanner.setText(undefined);
             }
-            this._children = children || ts.emptyArray;
+            // For syntactic classifications, all trivia are classcified together, including jsdoc comments.
+            // For that to work, the jsdoc comments should still be the leading trivia of the first child.
+            // Restoring the scanner position ensures that.
+            pos = this.pos;
+            ts.forEachChild(this, processNode, processNodes);
+            if (pos < this.end) {
+                this.addSyntheticNodes(children, pos, this.end);
+            }
+            ts.scanner.setText(undefined);
+            this._children = children;
         };
         NodeObject.prototype.getChildCount = function (sourceFile) {
             if (!this._children)
@@ -73493,8 +89476,10 @@ var ts;
             if (!children.length) {
                 return undefined;
             }
-            var child = children[0];
-            return child.kind < 139 /* FirstNode */ ? child : child.getFirstToken(sourceFile);
+            var child = ts.find(children, function (kid) { return kid.kind < 267 /* FirstJSDocNode */ || kid.kind > 294 /* LastJSDocNode */; });
+            return child.kind < 143 /* FirstNode */ ?
+                child :
+                child.getFirstToken(sourceFile);
         };
         NodeObject.prototype.getLastToken = function (sourceFile) {
             var children = this.getChildren(sourceFile);
@@ -73502,7 +89487,10 @@ var ts;
             if (!child) {
                 return undefined;
             }
-            return child.kind < 139 /* FirstNode */ ? child : child.getLastToken(sourceFile);
+            return child.kind < 143 /* FirstNode */ ? child : child.getLastToken(sourceFile);
+        };
+        NodeObject.prototype.forEachChild = function (cbNode, cbNodeArray) {
+            return ts.forEachChild(this, cbNode, cbNodeArray);
         };
         return NodeObject;
     }());
@@ -73541,19 +89529,22 @@ var ts;
         TokenOrIdentifierObject.prototype.getText = function (sourceFile) {
             return (sourceFile || this.getSourceFile()).text.substring(this.getStart(), this.getEnd());
         };
-        TokenOrIdentifierObject.prototype.getChildCount = function (sourceFile) {
+        TokenOrIdentifierObject.prototype.getChildCount = function () {
             return 0;
         };
-        TokenOrIdentifierObject.prototype.getChildAt = function (index, sourceFile) {
+        TokenOrIdentifierObject.prototype.getChildAt = function () {
             return undefined;
         };
-        TokenOrIdentifierObject.prototype.getChildren = function (sourceFile) {
+        TokenOrIdentifierObject.prototype.getChildren = function () {
             return ts.emptyArray;
         };
-        TokenOrIdentifierObject.prototype.getFirstToken = function (sourceFile) {
+        TokenOrIdentifierObject.prototype.getFirstToken = function () {
+            return undefined;
+        };
+        TokenOrIdentifierObject.prototype.getLastToken = function () {
             return undefined;
         };
-        TokenOrIdentifierObject.prototype.getLastToken = function (sourceFile) {
+        TokenOrIdentifierObject.prototype.forEachChild = function () {
             return undefined;
         };
         return TokenOrIdentifierObject;
@@ -73574,28 +89565,35 @@ var ts;
         };
         SymbolObject.prototype.getDocumentationComment = function () {
             if (this.documentationComment === undefined) {
-                this.documentationComment = ts.JsDoc.getJsDocCommentsFromDeclarations(this.declarations, this.name, !(this.flags & 4 /* Property */));
+                this.documentationComment = ts.JsDoc.getJsDocCommentsFromDeclarations(this.declarations);
             }
             return this.documentationComment;
         };
+        SymbolObject.prototype.getJsDocTags = function () {
+            if (this.tags === undefined) {
+                this.tags = ts.JsDoc.getJsDocTagsFromDeclarations(this.declarations);
+            }
+            return this.tags;
+        };
         return SymbolObject;
     }());
     var TokenObject = (function (_super) {
         __extends(TokenObject, _super);
         function TokenObject(kind, pos, end) {
-            _super.call(this, pos, end);
-            this.kind = kind;
+            var _this = _super.call(this, pos, end) || this;
+            _this.kind = kind;
+            return _this;
         }
         return TokenObject;
     }(TokenOrIdentifierObject));
     var IdentifierObject = (function (_super) {
         __extends(IdentifierObject, _super);
-        function IdentifierObject(kind, pos, end) {
-            _super.call(this, pos, end);
+        function IdentifierObject(_kind, pos, end) {
+            return _super.call(this, pos, end) || this;
         }
         return IdentifierObject;
     }(TokenOrIdentifierObject));
-    IdentifierObject.prototype.kind = 69 /* Identifier */;
+    IdentifierObject.prototype.kind = 71 /* Identifier */;
     var TypeObject = (function () {
         function TypeObject(checker, flags) {
             this.checker = checker;
@@ -73629,7 +89627,7 @@ var ts;
             return this.checker.getIndexTypeOfType(this, 1 /* Number */);
         };
         TypeObject.prototype.getBaseTypes = function () {
-            return this.flags & (32768 /* Class */ | 65536 /* Interface */)
+            return this.flags & 32768 /* Object */ && this.objectFlags & (1 /* Class */ | 2 /* Interface */)
                 ? this.checker.getBaseTypes(this)
                 : undefined;
         };
@@ -73656,18 +89654,22 @@ var ts;
         };
         SignatureObject.prototype.getDocumentationComment = function () {
             if (this.documentationComment === undefined) {
-                this.documentationComment = this.declaration ? ts.JsDoc.getJsDocCommentsFromDeclarations([this.declaration], 
-                /*name*/ undefined, 
-                /*canUseParsedParamTagComments*/ false) : [];
+                this.documentationComment = this.declaration ? ts.JsDoc.getJsDocCommentsFromDeclarations([this.declaration]) : [];
             }
             return this.documentationComment;
         };
+        SignatureObject.prototype.getJsDocTags = function () {
+            if (this.jsDocTags === undefined) {
+                this.jsDocTags = this.declaration ? ts.JsDoc.getJsDocTagsFromDeclarations([this.declaration]) : [];
+            }
+            return this.jsDocTags;
+        };
         return SignatureObject;
     }());
     var SourceFileObject = (function (_super) {
         __extends(SourceFileObject, _super);
         function SourceFileObject(kind, pos, end) {
-            _super.call(this, kind, pos, end);
+            return _super.call(this, kind, pos, end) || this;
         }
         SourceFileObject.prototype.update = function (newText, textChangeRange) {
             return ts.updateSourceFile(this, newText, textChangeRange);
@@ -73681,6 +89683,20 @@ var ts;
         SourceFileObject.prototype.getPositionOfLineAndCharacter = function (line, character) {
             return ts.getPositionOfLineAndCharacter(this, line, character);
         };
+        SourceFileObject.prototype.getLineEndOfPosition = function (pos) {
+            var line = this.getLineAndCharacterOfPosition(pos).line;
+            var lineStarts = this.getLineStarts();
+            var lastCharPos;
+            if (line + 1 >= lineStarts.length) {
+                lastCharPos = this.getEnd();
+            }
+            if (!lastCharPos) {
+                lastCharPos = lineStarts[line + 1] - 1;
+            }
+            var fullText = this.getFullText();
+            // if the new line is "\r\n", we should return the last non-new-line-character position
+            return fullText[lastCharPos] === "\n" && fullText[lastCharPos - 1] === "\r" ? lastCharPos - 1 : lastCharPos;
+        };
         SourceFileObject.prototype.getNamedDeclarations = function () {
             if (!this.namedDeclarations) {
                 this.namedDeclarations = this.computeNamedDeclarations();
@@ -73688,27 +89704,32 @@ var ts;
             return this.namedDeclarations;
         };
         SourceFileObject.prototype.computeNamedDeclarations = function () {
-            var result = ts.createMap();
+            var result = ts.createMultiMap();
             ts.forEachChild(this, visit);
             return result;
             function addDeclaration(declaration) {
                 var name = getDeclarationName(declaration);
                 if (name) {
-                    ts.multiMapAdd(result, name, declaration);
+                    result.add(name, declaration);
                 }
             }
             function getDeclarations(name) {
-                return result[name] || (result[name] = []);
+                var declarations = result.get(name);
+                if (!declarations) {
+                    result.set(name, declarations = []);
+                }
+                return declarations;
             }
             function getDeclarationName(declaration) {
-                if (declaration.name) {
-                    var result_6 = getTextOfIdentifierOrLiteral(declaration.name);
-                    if (result_6 !== undefined) {
-                        return result_6;
-                    }
-                    if (declaration.name.kind === 140 /* ComputedPropertyName */) {
-                        var expr = declaration.name.expression;
-                        if (expr.kind === 172 /* PropertyAccessExpression */) {
+                var name = ts.getNameOfDeclaration(declaration);
+                if (name) {
+                    var result_8 = getTextOfIdentifierOrLiteral(name);
+                    if (result_8 !== undefined) {
+                        return result_8;
+                    }
+                    if (name.kind === 144 /* ComputedPropertyName */) {
+                        var expr = name.expression;
+                        if (expr.kind === 179 /* PropertyAccessExpression */) {
                             return expr.name.text;
                         }
                         return getTextOfIdentifierOrLiteral(expr);
@@ -73718,7 +89739,7 @@ var ts;
             }
             function getTextOfIdentifierOrLiteral(node) {
                 if (node) {
-                    if (node.kind === 69 /* Identifier */ ||
+                    if (node.kind === 71 /* Identifier */ ||
                         node.kind === 9 /* StringLiteral */ ||
                         node.kind === 8 /* NumericLiteral */) {
                         return node.text;
@@ -73728,10 +89749,10 @@ var ts;
             }
             function visit(node) {
                 switch (node.kind) {
-                    case 220 /* FunctionDeclaration */:
-                    case 179 /* FunctionExpression */:
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
+                    case 228 /* FunctionDeclaration */:
+                    case 186 /* FunctionExpression */:
+                    case 151 /* MethodDeclaration */:
+                    case 150 /* MethodSignature */:
                         var functionDeclaration = node;
                         var declarationName = getDeclarationName(functionDeclaration);
                         if (declarationName) {
@@ -73748,56 +89769,58 @@ var ts;
                             else {
                                 declarations.push(functionDeclaration);
                             }
-                            ts.forEachChild(node, visit);
                         }
+                        ts.forEachChild(node, visit);
                         break;
-                    case 221 /* ClassDeclaration */:
-                    case 192 /* ClassExpression */:
-                    case 222 /* InterfaceDeclaration */:
-                    case 223 /* TypeAliasDeclaration */:
-                    case 224 /* EnumDeclaration */:
-                    case 225 /* ModuleDeclaration */:
-                    case 229 /* ImportEqualsDeclaration */:
-                    case 238 /* ExportSpecifier */:
-                    case 234 /* ImportSpecifier */:
-                    case 229 /* ImportEqualsDeclaration */:
-                    case 231 /* ImportClause */:
-                    case 232 /* NamespaceImport */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                    case 159 /* TypeLiteral */:
+                    case 229 /* ClassDeclaration */:
+                    case 199 /* ClassExpression */:
+                    case 230 /* InterfaceDeclaration */:
+                    case 231 /* TypeAliasDeclaration */:
+                    case 232 /* EnumDeclaration */:
+                    case 233 /* ModuleDeclaration */:
+                    case 237 /* ImportEqualsDeclaration */:
+                    case 246 /* ExportSpecifier */:
+                    case 242 /* ImportSpecifier */:
+                    case 237 /* ImportEqualsDeclaration */:
+                    case 239 /* ImportClause */:
+                    case 240 /* NamespaceImport */:
+                    case 153 /* GetAccessor */:
+                    case 154 /* SetAccessor */:
+                    case 163 /* TypeLiteral */:
                         addDeclaration(node);
                         ts.forEachChild(node, visit);
                         break;
-                    case 142 /* Parameter */:
+                    case 146 /* Parameter */:
                         // Only consider parameter properties
                         if (!ts.hasModifier(node, 92 /* ParameterPropertyModifier */)) {
                             break;
                         }
-                    // fall through
-                    case 218 /* VariableDeclaration */:
-                    case 169 /* BindingElement */: {
+                    // falls through
+                    case 226 /* VariableDeclaration */:
+                    case 176 /* BindingElement */: {
                         var decl = node;
                         if (ts.isBindingPattern(decl.name)) {
                             ts.forEachChild(decl.name, visit);
                             break;
                         }
-                        if (decl.initializer)
+                        if (decl.initializer) {
                             visit(decl.initializer);
+                        }
                     }
-                    case 255 /* EnumMember */:
-                    case 145 /* PropertyDeclaration */:
-                    case 144 /* PropertySignature */:
+                    // falls through
+                    case 264 /* EnumMember */:
+                    case 149 /* PropertyDeclaration */:
+                    case 148 /* PropertySignature */:
                         addDeclaration(node);
                         break;
-                    case 236 /* ExportDeclaration */:
+                    case 244 /* ExportDeclaration */:
                         // Handle named exports case e.g.:
                         //    export {a, b as B} from "mod";
                         if (node.exportClause) {
                             ts.forEach(node.exportClause.elements, visit);
                         }
                         break;
-                    case 230 /* ImportDeclaration */:
+                    case 238 /* ImportDeclaration */:
                         var importClause = node.importClause;
                         if (importClause) {
                             // Handle default import case e.g.:
@@ -73809,7 +89832,7 @@ var ts;
                             //    import * as NS from "mod";
                             //    import {a, b as B} from "mod";
                             if (importClause.namedBindings) {
-                                if (importClause.namedBindings.kind === 232 /* NamespaceImport */) {
+                                if (importClause.namedBindings.kind === 240 /* NamespaceImport */) {
                                     addDeclaration(importClause.namedBindings);
                                 }
                                 else {
@@ -73825,6 +89848,17 @@ var ts;
         };
         return SourceFileObject;
     }(NodeObject));
+    var SourceMapSourceObject = (function () {
+        function SourceMapSourceObject(fileName, text, skipTrivia) {
+            this.fileName = fileName;
+            this.text = text;
+            this.skipTrivia = skipTrivia;
+        }
+        SourceMapSourceObject.prototype.getLineAndCharacterOfPosition = function (pos) {
+            return ts.getLineAndCharacterOfPosition(this, pos);
+        };
+        return SourceMapSourceObject;
+    }());
     function getServicesObjectAllocator() {
         return {
             getNodeConstructor: function () { return NodeObject; },
@@ -73834,6 +89868,7 @@ var ts;
             getSymbolConstructor: function () { return SymbolObject; },
             getTypeConstructor: function () { return TypeObject; },
             getSignatureConstructor: function () { return SignatureObject; },
+            getSourceMapSourceConstructor: function () { return SourceMapSourceObject; },
         };
     }
     function toEditorSettings(optionsAsMap) {
@@ -73875,13 +89910,16 @@ var ts;
         };
     }
     ts.getDefaultCompilerOptions = getDefaultCompilerOptions;
-    // Cache host information about script should be refreshed
+    function getSupportedCodeFixes() {
+        return ts.codefix.getSupportedErrorCodes();
+    }
+    ts.getSupportedCodeFixes = getSupportedCodeFixes;
+    // Cache host information about script Should be refreshed
     // at each language service public entry point, since we don't know when
-    // set of scripts handled by the host changes.
+    // the set of scripts handled by the host changes.
     var HostCache = (function () {
         function HostCache(host, getCanonicalFileName) {
             this.host = host;
-            this.getCanonicalFileName = getCanonicalFileName;
             // script id => script index
             this.currentDirectory = host.getCurrentDirectory();
             this.fileNameToEntry = ts.createFileMap();
@@ -73911,24 +89949,20 @@ var ts;
             this.fileNameToEntry.set(path, entry);
             return entry;
         };
-        HostCache.prototype.getEntry = function (path) {
+        HostCache.prototype.getEntryByPath = function (path) {
             return this.fileNameToEntry.get(path);
         };
-        HostCache.prototype.contains = function (path) {
+        HostCache.prototype.containsEntryByPath = function (path) {
             return this.fileNameToEntry.contains(path);
         };
-        HostCache.prototype.getOrCreateEntry = function (fileName) {
-            var path = ts.toPath(fileName, this.currentDirectory, this.getCanonicalFileName);
-            return this.getOrCreateEntryByPath(fileName, path);
-        };
         HostCache.prototype.getOrCreateEntryByPath = function (fileName, path) {
-            return this.contains(path)
-                ? this.getEntry(path)
+            return this.containsEntryByPath(path)
+                ? this.getEntryByPath(path)
                 : this.createEntry(fileName, path);
         };
         HostCache.prototype.getRootFileNames = function () {
             var fileNames = [];
-            this.fileNameToEntry.forEachValue(function (path, value) {
+            this.fileNameToEntry.forEachValue(function (_path, value) {
                 if (value) {
                     fileNames.push(value.hostFileName);
                 }
@@ -73936,11 +89970,11 @@ var ts;
             return fileNames;
         };
         HostCache.prototype.getVersion = function (path) {
-            var file = this.getEntry(path);
+            var file = this.getEntryByPath(path);
             return file && file.version;
         };
         HostCache.prototype.getScriptSnapshot = function (path) {
-            var file = this.getEntry(path);
+            var file = this.getEntryByPath(path);
             return file && file.scriptSnapshot;
         };
         return HostCache;
@@ -73960,7 +89994,7 @@ var ts;
             var sourceFile;
             if (this.currentFileName !== fileName) {
                 // This is a new file, just parse it
-                sourceFile = createLanguageServiceSourceFile(fileName, scriptSnapshot, 2 /* Latest */, version, /*setNodeParents*/ true, scriptKind);
+                sourceFile = createLanguageServiceSourceFile(fileName, scriptSnapshot, 5 /* Latest */, version, /*setNodeParents*/ true, scriptKind);
             }
             else if (this.currentFileVersion !== version) {
                 // This is the same file, just a newer version. Incrementally parse the file.
@@ -74054,10 +90088,40 @@ var ts;
         };
         return CancellationTokenObject;
     }());
+    /* @internal */
+    /** A cancellation that throttles calls to the host */
+    var ThrottledCancellationToken = (function () {
+        function ThrottledCancellationToken(hostCancellationToken, throttleWaitMilliseconds) {
+            if (throttleWaitMilliseconds === void 0) { throttleWaitMilliseconds = 20; }
+            this.hostCancellationToken = hostCancellationToken;
+            this.throttleWaitMilliseconds = throttleWaitMilliseconds;
+            // Store when we last tried to cancel.  Checking cancellation can be expensive (as we have
+            // to marshall over to the host layer).  So we only bother actually checking once enough
+            // time has passed.
+            this.lastCancellationCheckTime = 0;
+        }
+        ThrottledCancellationToken.prototype.isCancellationRequested = function () {
+            var time = ts.timestamp();
+            var duration = Math.abs(time - this.lastCancellationCheckTime);
+            if (duration >= this.throttleWaitMilliseconds) {
+                // Check no more than once every throttle wait milliseconds
+                this.lastCancellationCheckTime = time;
+                return this.hostCancellationToken.isCancellationRequested();
+            }
+            return false;
+        };
+        ThrottledCancellationToken.prototype.throwIfCancellationRequested = function () {
+            if (this.isCancellationRequested()) {
+                throw new ts.OperationCanceledException();
+            }
+        };
+        return ThrottledCancellationToken;
+    }());
+    ts.ThrottledCancellationToken = ThrottledCancellationToken;
     function createLanguageService(host, documentRegistry) {
         if (documentRegistry === void 0) { documentRegistry = ts.createDocumentRegistry(host.useCaseSensitiveFileNames && host.useCaseSensitiveFileNames(), host.getCurrentDirectory()); }
         var syntaxTreeCache = new SyntaxTreeCache(host);
-        var ruleProvider;
+        ruleProvider = ruleProvider || new ts.formatting.RulesProvider();
         var program;
         var lastProjectVersion;
         var lastTypesRootVersion = 0;
@@ -74082,10 +90146,6 @@ var ts;
             return sourceFile;
         }
         function getRuleProvider(options) {
-            // Ensure rules are initialized and up to date wrt to formatting options
-            if (!ruleProvider) {
-                ruleProvider = new ts.formatting.RulesProvider();
-            }
             ruleProvider.ensureUpToDate(options);
             return ruleProvider;
         }
@@ -74138,16 +90198,23 @@ var ts;
                 useCaseSensitiveFileNames: function () { return useCaseSensitivefileNames; },
                 getNewLine: function () { return ts.getNewLineOrDefaultFromHost(host); },
                 getDefaultLibFileName: function (options) { return host.getDefaultLibFileName(options); },
-                writeFile: function (fileName, data, writeByteOrderMark) { },
+                writeFile: ts.noop,
                 getCurrentDirectory: function () { return currentDirectory; },
                 fileExists: function (fileName) {
                     // stub missing host functionality
-                    return hostCache.getOrCreateEntry(fileName) !== undefined;
+                    var path = ts.toPath(fileName, currentDirectory, getCanonicalFileName);
+                    return hostCache.containsEntryByPath(path) ?
+                        !!hostCache.getEntryByPath(path) :
+                        (host.fileExists && host.fileExists(fileName));
                 },
                 readFile: function (fileName) {
                     // stub missing host functionality
-                    var entry = hostCache.getOrCreateEntry(fileName);
-                    return entry && entry.scriptSnapshot.getText(0, entry.scriptSnapshot.getLength());
+                    var path = ts.toPath(fileName, currentDirectory, getCanonicalFileName);
+                    if (hostCache.containsEntryByPath(path)) {
+                        var entry = hostCache.getEntryByPath(path);
+                        return entry && entry.scriptSnapshot.getText(0, entry.scriptSnapshot.getLength());
+                    }
+                    return host.readFile && host.readFile(fileName);
                 },
                 directoryExists: function (directoryName) {
                     return ts.directoryProbablyExists(directoryName, host);
@@ -74235,6 +90302,7 @@ var ts;
                         ts.Debug.assert(hostFileInformation.scriptKind === oldSourceFile.scriptKind, "Registered script kind (" + oldSourceFile.scriptKind + ") should match new script kind (" + hostFileInformation.scriptKind + ") for file: " + path);
                         return documentRegistry.updateDocumentWithKey(fileName, path, newSettings, documentRegistryBucketKey, hostFileInformation.scriptSnapshot, hostFileInformation.version, hostFileInformation.scriptKind);
                     }
+                    // We didn't already have the file.  Fall through and acquire it from the registry.
                 }
                 // Could not find this file in the old program, create a new SourceFile for it.
                 return documentRegistry.acquireDocumentWithKey(fileName, path, newSettings, documentRegistryBucketKey, hostFileInformation.scriptSnapshot, hostFileInformation.version, hostFileInformation.scriptKind);
@@ -74263,8 +90331,18 @@ var ts;
                         return false;
                     }
                 }
+                var currentOptions = program.getCompilerOptions();
+                var newOptions = hostCache.compilationSettings();
                 // If the compilation settings do no match, then the program is not up-to-date
-                return ts.compareDataObjects(program.getCompilerOptions(), hostCache.compilationSettings());
+                if (!ts.compareDataObjects(currentOptions, newOptions)) {
+                    return false;
+                }
+                // If everything matches but the text of config file is changed,
+                // error locations can change for program options, so update the program
+                if (currentOptions.configFile && newOptions.configFile) {
+                    return currentOptions.configFile.text === newOptions.configFile.text;
+                }
+                return true;
             }
         }
         function getProgram() {
@@ -74272,14 +90350,16 @@ var ts;
             return program;
         }
         function cleanupSemanticCache() {
-            // TODO: Should we jettison the program (or it's type checker) here?
+            program = undefined;
         }
         function dispose() {
             if (program) {
                 ts.forEach(program.getSourceFiles(), function (f) {
                     return documentRegistry.releaseDocument(f.fileName, program.getCompilerOptions());
                 });
+                program = undefined;
             }
+            host = undefined;
         }
         /// Diagnostics
         function getSyntacticDiagnostics(fileName) {
@@ -74322,7 +90402,7 @@ var ts;
         function getQuickInfoAtPosition(fileName, position) {
             synchronizeHostData();
             var sourceFile = getValidSourceFile(fileName);
-            var node = ts.getTouchingPropertyName(sourceFile, position);
+            var node = ts.getTouchingPropertyName(sourceFile, position, /*includeJsDocComment*/ true);
             if (node === sourceFile) {
                 return undefined;
             }
@@ -74334,21 +90414,22 @@ var ts;
             if (!symbol || typeChecker.isUnknownSymbol(symbol)) {
                 // Try getting just type at this position and show
                 switch (node.kind) {
-                    case 69 /* Identifier */:
-                    case 172 /* PropertyAccessExpression */:
-                    case 139 /* QualifiedName */:
-                    case 97 /* ThisKeyword */:
-                    case 165 /* ThisType */:
-                    case 95 /* SuperKeyword */:
+                    case 71 /* Identifier */:
+                    case 179 /* PropertyAccessExpression */:
+                    case 143 /* QualifiedName */:
+                    case 99 /* ThisKeyword */:
+                    case 169 /* ThisType */:
+                    case 97 /* SuperKeyword */:
                         // For the identifiers/this/super etc get the type at position
                         var type = typeChecker.getTypeAtLocation(node);
                         if (type) {
                             return {
-                                kind: ts.ScriptElementKind.unknown,
-                                kindModifiers: ts.ScriptElementKindModifier.none,
+                                kind: "" /* unknown */,
+                                kindModifiers: "" /* none */,
                                 textSpan: ts.createTextSpan(node.getStart(), node.getWidth()),
                                 displayParts: ts.typeToDisplayParts(typeChecker, type, ts.getContainerNode(node)),
-                                documentation: type.symbol ? type.symbol.getDocumentationComment() : undefined
+                                documentation: type.symbol ? type.symbol.getDocumentationComment() : undefined,
+                                tags: type.symbol ? type.symbol.getJsDocTags() : undefined
                             };
                         }
                 }
@@ -74360,7 +90441,8 @@ var ts;
                 kindModifiers: ts.SymbolDisplay.getSymbolModifiers(symbol),
                 textSpan: ts.createTextSpan(node.getStart(), node.getWidth()),
                 displayParts: displayPartsDocumentationsAndKind.displayParts,
-                documentation: displayPartsDocumentationsAndKind.documentation
+                documentation: displayPartsDocumentationsAndKind.documentation,
+                tags: displayPartsDocumentationsAndKind.tags
             };
         }
         /// Goto definition
@@ -74368,22 +90450,23 @@ var ts;
             synchronizeHostData();
             return ts.GoToDefinition.getDefinitionAtPosition(program, getValidSourceFile(fileName), position);
         }
-        /// Goto implementation
-        function getImplementationAtPosition(fileName, position) {
-            synchronizeHostData();
-            return ts.GoToImplementation.getImplementationAtPosition(program.getTypeChecker(), cancellationToken, program.getSourceFiles(), ts.getTouchingPropertyName(getValidSourceFile(fileName), position));
-        }
         function getTypeDefinitionAtPosition(fileName, position) {
             synchronizeHostData();
             return ts.GoToDefinition.getTypeDefinitionAtPosition(program.getTypeChecker(), getValidSourceFile(fileName), position);
         }
+        /// Goto implementation
+        function getImplementationAtPosition(fileName, position) {
+            synchronizeHostData();
+            return ts.FindAllReferences.getImplementationsAtPosition(program, cancellationToken, program.getSourceFiles(), getValidSourceFile(fileName), position);
+        }
+        /// References and Occurrences
         function getOccurrencesAtPosition(fileName, position) {
             var results = getOccurrencesAtPositionCore(fileName, position);
             if (results) {
-                var sourceFile_3 = getCanonicalFileName(ts.normalizeSlashes(fileName));
+                var sourceFile_2 = getCanonicalFileName(ts.normalizeSlashes(fileName));
                 // Get occurrences only supports reporting occurrences for the file queried.  So
                 // filter down to that list.
-                results = ts.filter(results, function (r) { return getCanonicalFileName(ts.normalizeSlashes(r.fileName)) === sourceFile_3; });
+                results = ts.filter(results, function (r) { return getCanonicalFileName(ts.normalizeSlashes(r.fileName)) === sourceFile_2; });
             }
             return results;
         }
@@ -74391,11 +90474,9 @@ var ts;
             synchronizeHostData();
             var sourceFilesToSearch = ts.map(filesToSearch, function (f) { return program.getSourceFile(f); });
             var sourceFile = getValidSourceFile(fileName);
-            return ts.DocumentHighlights.getDocumentHighlights(program.getTypeChecker(), cancellationToken, sourceFile, position, sourceFilesToSearch);
+            return ts.DocumentHighlights.getDocumentHighlights(program, cancellationToken, sourceFile, position, sourceFilesToSearch);
         }
-        /// References and Occurrences
         function getOccurrencesAtPositionCore(fileName, position) {
-            synchronizeHostData();
             return convertDocumentHighlights(getDocumentHighlights(fileName, position, [fileName]));
             function convertDocumentHighlights(documentHighlights) {
                 if (!documentHighlights) {
@@ -74409,8 +90490,9 @@ var ts;
                         result.push({
                             fileName: entry.fileName,
                             textSpan: highlightSpan.textSpan,
-                            isWriteAccess: highlightSpan.kind === ts.HighlightSpanKind.writtenReference,
-                            isDefinition: false
+                            isWriteAccess: highlightSpan.kind === "writtenReference" /* writtenReference */,
+                            isDefinition: false,
+                            isInString: highlightSpan.isInString,
                         });
                     }
                 }
@@ -74418,21 +90500,18 @@ var ts;
             }
         }
         function findRenameLocations(fileName, position, findInStrings, findInComments) {
-            var referencedSymbols = findReferencedSymbols(fileName, position, findInStrings, findInComments);
-            return ts.FindAllReferences.convertReferences(referencedSymbols);
+            return getReferences(fileName, position, { findInStrings: findInStrings, findInComments: findInComments, isForRename: true });
         }
         function getReferencesAtPosition(fileName, position) {
-            var referencedSymbols = findReferencedSymbols(fileName, position, /*findInStrings*/ false, /*findInComments*/ false);
-            return ts.FindAllReferences.convertReferences(referencedSymbols);
+            return getReferences(fileName, position);
         }
-        function findReferences(fileName, position) {
-            var referencedSymbols = findReferencedSymbols(fileName, position, /*findInStrings*/ false, /*findInComments*/ false);
-            // Only include referenced symbols that have a valid definition.
-            return ts.filter(referencedSymbols, function (rs) { return !!rs.definition; });
+        function getReferences(fileName, position, options) {
+            synchronizeHostData();
+            return ts.FindAllReferences.findReferencedEntries(program, cancellationToken, program.getSourceFiles(), getValidSourceFile(fileName), position, options);
         }
-        function findReferencedSymbols(fileName, position, findInStrings, findInComments) {
+        function findReferences(fileName, position) {
             synchronizeHostData();
-            return ts.FindAllReferences.findReferencedSymbols(program.getTypeChecker(), cancellationToken, program.getSourceFiles(), getValidSourceFile(fileName), position, findInStrings, findInComments);
+            return ts.FindAllReferences.findReferencedSymbols(program, cancellationToken, program.getSourceFiles(), getValidSourceFile(fileName), position);
         }
         /// NavigateTo
         function getNavigateToItems(searchValue, maxResultCount, fileName, excludeDtsFiles) {
@@ -74451,7 +90530,8 @@ var ts;
                     text: data
                 });
             }
-            var emitOutput = program.emit(sourceFile, writeFile, cancellationToken, emitOnlyDtsFiles);
+            var customTransformers = host.getCustomTransformers && host.getCustomTransformers();
+            var emitOutput = program.emit(sourceFile, writeFile, cancellationToken, emitOnlyDtsFiles, customTransformers);
             return {
                 outputFiles: outputFiles,
                 emitSkipped: emitOutput.emitSkipped
@@ -74473,24 +90553,24 @@ var ts;
         function getSourceFile(fileName) {
             return getNonBoundSourceFile(fileName);
         }
-        function getNameOrDottedNameSpan(fileName, startPos, endPos) {
+        function getNameOrDottedNameSpan(fileName, startPos, _endPos) {
             var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
             // Get node at the location
-            var node = ts.getTouchingPropertyName(sourceFile, startPos);
+            var node = ts.getTouchingPropertyName(sourceFile, startPos, /*includeJsDocComment*/ false);
             if (node === sourceFile) {
                 return;
             }
             switch (node.kind) {
-                case 172 /* PropertyAccessExpression */:
-                case 139 /* QualifiedName */:
+                case 179 /* PropertyAccessExpression */:
+                case 143 /* QualifiedName */:
                 case 9 /* StringLiteral */:
-                case 84 /* FalseKeyword */:
-                case 99 /* TrueKeyword */:
-                case 93 /* NullKeyword */:
-                case 95 /* SuperKeyword */:
-                case 97 /* ThisKeyword */:
-                case 165 /* ThisType */:
-                case 69 /* Identifier */:
+                case 86 /* FalseKeyword */:
+                case 101 /* TrueKeyword */:
+                case 95 /* NullKeyword */:
+                case 97 /* SuperKeyword */:
+                case 99 /* ThisKeyword */:
+                case 169 /* ThisType */:
+                case 71 /* Identifier */:
                     break;
                 // Cant create the text span
                 default:
@@ -74506,7 +90586,7 @@ var ts;
                     // If this is name of a module declarations, check if this is right side of dotted module name
                     // If parent of the module declaration which is parent of this node is module declaration and its body is the module declaration that this node is name of
                     // Then this name is name from dotted module
-                    if (nodeForStartPos.parent.parent.kind === 225 /* ModuleDeclaration */ &&
+                    if (nodeForStartPos.parent.parent.kind === 233 /* ModuleDeclaration */ &&
                         nodeForStartPos.parent.parent.body === nodeForStartPos.parent) {
                         // Use parent module declarations name for start pos
                         nodeForStartPos = nodeForStartPos.parent.parent.name;
@@ -74529,14 +90609,28 @@ var ts;
             return ts.BreakpointResolver.spanInSourceFileAtLocation(sourceFile, position);
         }
         function getNavigationBarItems(fileName) {
-            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            return ts.NavigationBar.getNavigationBarItems(sourceFile);
+            return ts.NavigationBar.getNavigationBarItems(syntaxTreeCache.getCurrentSourceFile(fileName), cancellationToken);
+        }
+        function getNavigationTree(fileName) {
+            return ts.NavigationBar.getNavigationTree(syntaxTreeCache.getCurrentSourceFile(fileName), cancellationToken);
+        }
+        function isTsOrTsxFile(fileName) {
+            var kind = ts.getScriptKind(fileName, host);
+            return kind === 3 /* TS */ || kind === 4 /* TSX */;
         }
         function getSemanticClassifications(fileName, span) {
+            if (!isTsOrTsxFile(fileName)) {
+                // do not run semantic classification on non-ts-or-tsx files
+                return [];
+            }
             synchronizeHostData();
             return ts.getSemanticClassifications(program.getTypeChecker(), cancellationToken, getValidSourceFile(fileName), program.getClassifiableNames(), span);
         }
         function getEncodedSemanticClassifications(fileName, span) {
+            if (!isTsOrTsxFile(fileName)) {
+                // do not run semantic classification on non-ts-or-tsx files
+                return { spans: [], endOfLineState: 0 /* None */ };
+            }
             synchronizeHostData();
             return ts.getEncodedSemanticClassifications(program.getTypeChecker(), cancellationToken, getValidSourceFile(fileName), program.getClassifiableNames(), span);
         }
@@ -74551,12 +90645,12 @@ var ts;
         function getOutliningSpans(fileName) {
             // doesn't use compiler - no need to synchronize with host
             var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            return ts.OutliningElementsCollector.collectElements(sourceFile);
+            return ts.OutliningElementsCollector.collectElements(sourceFile, cancellationToken);
         }
         function getBraceMatchingAtPosition(fileName, position) {
             var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
             var result = [];
-            var token = ts.getTouchingToken(sourceFile, position);
+            var token = ts.getTouchingToken(sourceFile, position, /*includeJsDocComment*/ false);
             if (token.getStart(sourceFile) === position) {
                 var matchKind = getMatchingTokenKind(token);
                 // Ensure that there is a corresponding token to match ours.
@@ -74583,14 +90677,14 @@ var ts;
             return result;
             function getMatchingTokenKind(token) {
                 switch (token.kind) {
-                    case 15 /* OpenBraceToken */: return 16 /* CloseBraceToken */;
-                    case 17 /* OpenParenToken */: return 18 /* CloseParenToken */;
-                    case 19 /* OpenBracketToken */: return 20 /* CloseBracketToken */;
-                    case 25 /* LessThanToken */: return 27 /* GreaterThanToken */;
-                    case 16 /* CloseBraceToken */: return 15 /* OpenBraceToken */;
-                    case 18 /* CloseParenToken */: return 17 /* OpenParenToken */;
-                    case 20 /* CloseBracketToken */: return 19 /* OpenBracketToken */;
-                    case 27 /* GreaterThanToken */: return 25 /* LessThanToken */;
+                    case 17 /* OpenBraceToken */: return 18 /* CloseBraceToken */;
+                    case 19 /* OpenParenToken */: return 20 /* CloseParenToken */;
+                    case 21 /* OpenBracketToken */: return 22 /* CloseBracketToken */;
+                    case 27 /* LessThanToken */: return 29 /* GreaterThanToken */;
+                    case 18 /* CloseBraceToken */: return 17 /* OpenBraceToken */;
+                    case 20 /* CloseParenToken */: return 19 /* OpenParenToken */;
+                    case 22 /* CloseBracketToken */: return 21 /* OpenBracketToken */;
+                    case 29 /* GreaterThanToken */: return 27 /* LessThanToken */;
                 }
                 return undefined;
             }
@@ -74629,6 +90723,31 @@ var ts;
             }
             return [];
         }
+        function getCodeFixesAtPosition(fileName, start, end, errorCodes, formatOptions) {
+            synchronizeHostData();
+            var sourceFile = getValidSourceFile(fileName);
+            var span = { start: start, length: end - start };
+            var newLineChar = ts.getNewLineOrDefaultFromHost(host);
+            var allFixes = [];
+            ts.forEach(ts.deduplicate(errorCodes), function (error) {
+                cancellationToken.throwIfCancellationRequested();
+                var context = {
+                    errorCode: error,
+                    sourceFile: sourceFile,
+                    span: span,
+                    program: program,
+                    newLineCharacter: newLineChar,
+                    host: host,
+                    cancellationToken: cancellationToken,
+                    rulesProvider: getRuleProvider(formatOptions)
+                };
+                var fixes = ts.codefix.getFixes(context);
+                if (fixes) {
+                    allFixes = allFixes.concat(fixes);
+                }
+            });
+            return allFixes;
+        }
         function getDocCommentTemplateAtPosition(fileName, position) {
             return ts.JsDoc.getDocCommentTemplateAtPosition(ts.getNewLineOrDefaultFromHost(host), syntaxTreeCache.getCurrentSourceFile(fileName), position);
         }
@@ -74644,7 +90763,7 @@ var ts;
             }
             var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
             // Check if in a context where we don't want to perform any insertion
-            if (ts.isInString(sourceFile, position) || ts.isInComment(sourceFile, position)) {
+            if (ts.isInString(sourceFile, position)) {
                 return false;
             }
             if (ts.isInsideJsxElementOrAttribute(sourceFile, position)) {
@@ -74653,6 +90772,12 @@ var ts;
             if (ts.isInTemplateString(sourceFile, position)) {
                 return false;
             }
+            switch (openingBrace) {
+                case 39 /* singleQuote */:
+                case 34 /* doubleQuote */:
+                case 96 /* backtick */:
+                    return !ts.isInComment(sourceFile, position);
+            }
             return true;
         }
         function getTodoComments(fileName, descriptors) {
@@ -74695,12 +90820,11 @@ var ts;
                     var matchPosition = matchArray.index + preamble.length;
                     // OK, we have found a match in the file.  This is only an acceptable match if
                     // it is contained within a comment.
-                    var token = ts.getTokenAtPosition(sourceFile, matchPosition);
-                    if (!ts.isInsideComment(sourceFile, token, matchPosition)) {
+                    if (!ts.isInComment(sourceFile, matchPosition)) {
                         continue;
                     }
                     var descriptor = undefined;
-                    for (var i = 0, n = descriptors.length; i < n; i++) {
+                    for (var i = 0; i < descriptors.length; i++) {
                         if (matchArray[i + firstDescriptorCaptureIndex]) {
                             descriptor = descriptors[i];
                         }
@@ -74784,6 +90908,28 @@ var ts;
             var defaultLibFileName = host.getDefaultLibFileName(host.getCompilationSettings());
             return ts.Rename.getRenameInfo(program.getTypeChecker(), defaultLibFileName, getCanonicalFileName, getValidSourceFile(fileName), position);
         }
+        function getRefactorContext(file, positionOrRange, formatOptions) {
+            var _a = typeof positionOrRange === "number" ? [positionOrRange, undefined] : [positionOrRange.pos, positionOrRange.end], startPosition = _a[0], endPosition = _a[1];
+            return {
+                file: file,
+                startPosition: startPosition,
+                endPosition: endPosition,
+                program: getProgram(),
+                newLineCharacter: host.getNewLine(),
+                rulesProvider: getRuleProvider(formatOptions),
+                cancellationToken: cancellationToken
+            };
+        }
+        function getApplicableRefactors(fileName, positionOrRange) {
+            synchronizeHostData();
+            var file = getValidSourceFile(fileName);
+            return ts.refactor.getApplicableRefactors(getRefactorContext(file, positionOrRange));
+        }
+        function getEditsForRefactor(fileName, formatOptions, positionOrRange, refactorName, actionName) {
+            synchronizeHostData();
+            var file = getValidSourceFile(fileName);
+            return ts.refactor.getEditsForRefactor(getRefactorContext(file, positionOrRange, formatOptions), refactorName, actionName);
+        }
         return {
             dispose: dispose,
             cleanupSemanticCache: cleanupSemanticCache,
@@ -74812,6 +90958,7 @@ var ts;
             getRenameInfo: getRenameInfo,
             findRenameLocations: findRenameLocations,
             getNavigationBarItems: getNavigationBarItems,
+            getNavigationTree: getNavigationTree,
             getOutliningSpans: getOutliningSpans,
             getTodoComments: getTodoComments,
             getBraceMatchingAtPosition: getBraceMatchingAtPosition,
@@ -74821,14 +90968,18 @@ var ts;
             getFormattingEditsAfterKeystroke: getFormattingEditsAfterKeystroke,
             getDocCommentTemplateAtPosition: getDocCommentTemplateAtPosition,
             isValidBraceCompletionAtPosition: isValidBraceCompletionAtPosition,
+            getCodeFixesAtPosition: getCodeFixesAtPosition,
             getEmitOutput: getEmitOutput,
             getNonBoundSourceFile: getNonBoundSourceFile,
             getSourceFile: getSourceFile,
-            getProgram: getProgram
+            getProgram: getProgram,
+            getApplicableRefactors: getApplicableRefactors,
+            getEditsForRefactor: getEditsForRefactor,
         };
     }
     ts.createLanguageService = createLanguageService;
     /* @internal */
+    /** Names in the name table are escaped, so an identifier `__foo` will have a name table entry `___foo`. */
     function getNameTable(sourceFile) {
         if (!sourceFile.nameTable) {
             initializeNameTable(sourceFile);
@@ -74842,8 +90993,8 @@ var ts;
         sourceFile.nameTable = nameTable;
         function walk(node) {
             switch (node.kind) {
-                case 69 /* Identifier */:
-                    nameTable[node.text] = nameTable[node.text] === undefined ? node.pos : -1;
+                case 71 /* Identifier */:
+                    setNameTable(node.text, node);
                     break;
                 case 9 /* StringLiteral */:
                 case 8 /* NumericLiteral */:
@@ -74852,34 +91003,95 @@ var ts;
                     // then we want 'something' to be in the name table.  Similarly, if we have
                     // "a['propname']" then we want to store "propname" in the name table.
                     if (ts.isDeclarationName(node) ||
-                        node.parent.kind === 240 /* ExternalModuleReference */ ||
+                        node.parent.kind === 248 /* ExternalModuleReference */ ||
                         isArgumentOfElementAccessExpression(node) ||
                         ts.isLiteralComputedPropertyDeclarationName(node)) {
-                        nameTable[node.text] = nameTable[node.text] === undefined ? node.pos : -1;
+                        setNameTable(node.text, node);
                     }
                     break;
                 default:
                     ts.forEachChild(node, walk);
-                    if (node.jsDocComments) {
-                        for (var _i = 0, _a = node.jsDocComments; _i < _a.length; _i++) {
-                            var jsDocComment = _a[_i];
-                            ts.forEachChild(jsDocComment, walk);
+                    if (node.jsDoc) {
+                        for (var _i = 0, _a = node.jsDoc; _i < _a.length; _i++) {
+                            var jsDoc = _a[_i];
+                            ts.forEachChild(jsDoc, walk);
                         }
                     }
             }
         }
+        function setNameTable(text, node) {
+            nameTable.set(text, nameTable.get(text) === undefined ? node.pos : -1);
+        }
+    }
+    function isObjectLiteralElement(node) {
+        switch (node.kind) {
+            case 253 /* JsxAttribute */:
+            case 255 /* JsxSpreadAttribute */:
+            case 261 /* PropertyAssignment */:
+            case 262 /* ShorthandPropertyAssignment */:
+            case 151 /* MethodDeclaration */:
+            case 153 /* GetAccessor */:
+            case 154 /* SetAccessor */:
+                return true;
+        }
+        return false;
+    }
+    /**
+     * Returns the containing object literal property declaration given a possible name node, e.g. "a" in x = { "a": 1 }
+     */
+    /* @internal */
+    function getContainingObjectLiteralElement(node) {
+        switch (node.kind) {
+            case 9 /* StringLiteral */:
+            case 8 /* NumericLiteral */:
+                if (node.parent.kind === 144 /* ComputedPropertyName */) {
+                    return isObjectLiteralElement(node.parent.parent) ? node.parent.parent : undefined;
+                }
+            // falls through
+            case 71 /* Identifier */:
+                return isObjectLiteralElement(node.parent) &&
+                    (node.parent.parent.kind === 178 /* ObjectLiteralExpression */ || node.parent.parent.kind === 254 /* JsxAttributes */) &&
+                    node.parent.name === node ? node.parent : undefined;
+        }
+        return undefined;
+    }
+    ts.getContainingObjectLiteralElement = getContainingObjectLiteralElement;
+    /* @internal */
+    function getPropertySymbolsFromContextualType(typeChecker, node) {
+        var objectLiteral = node.parent;
+        var contextualType = typeChecker.getContextualType(objectLiteral);
+        var name = ts.getTextOfPropertyName(node.name);
+        if (name && contextualType) {
+            var result_9 = [];
+            var symbol = contextualType.getProperty(name);
+            if (contextualType.flags & 65536 /* Union */) {
+                ts.forEach(contextualType.types, function (t) {
+                    var symbol = t.getProperty(name);
+                    if (symbol) {
+                        result_9.push(symbol);
+                    }
+                });
+                return result_9;
+            }
+            if (symbol) {
+                result_9.push(symbol);
+                return result_9;
+            }
+        }
+        return undefined;
     }
+    ts.getPropertySymbolsFromContextualType = getPropertySymbolsFromContextualType;
     function isArgumentOfElementAccessExpression(node) {
         return node &&
             node.parent &&
-            node.parent.kind === 173 /* ElementAccessExpression */ &&
+            node.parent.kind === 180 /* ElementAccessExpression */ &&
             node.parent.argumentExpression === node;
     }
     /**
-      * Get the path of the default library files (lib.d.ts) as distributed with the typescript
-      * node package.
-      * The functionality is not supported if the ts module is consumed outside of a node module.
-      */
+     * Get the path of the default library files (lib.d.ts) as distributed with the typescript
+     * node package.
+     * The functionality is not supported if the ts module is consumed outside of a node module.
+     */
     function getDefaultLibFilePath(options) {
         // Check __dirname is defined and that we are on a node.js system.
         if (typeof __dirname !== "undefined") {
@@ -74888,10 +91100,7 @@ var ts;
         throw new Error("getDefaultLibFilePath is only supported when consumed as a node module. ");
     }
     ts.getDefaultLibFilePath = getDefaultLibFilePath;
-    function initializeServices() {
-        ts.objectAllocator = getServicesObjectAllocator();
-    }
-    initializeServices();
+    ts.objectAllocator = getServicesObjectAllocator();
 })(ts || (ts = {}));
 // Copyright (c) Microsoft. All rights reserved. Licensed under the Apache License, Version 2.0.
 // See LICENSE.txt in the project root for complete license information.
@@ -74909,7 +91118,7 @@ var ts;
             if (sourceFile.isDeclarationFile) {
                 return undefined;
             }
-            var tokenAtLocation = ts.getTokenAtPosition(sourceFile, position);
+            var tokenAtLocation = ts.getTokenAtPosition(sourceFile, position, /*includeJsDocComment*/ false);
             var lineOfPosition = sourceFile.getLineAndCharacterOfPosition(position).line;
             if (sourceFile.getLineAndCharacterOfPosition(tokenAtLocation.getStart(sourceFile)).line > lineOfPosition) {
                 // Get previous token if the token is returned starts on new line
@@ -74956,143 +91165,144 @@ var ts;
             function spanInNode(node) {
                 if (node) {
                     switch (node.kind) {
-                        case 200 /* VariableStatement */:
+                        case 208 /* VariableStatement */:
                             // Span on first variable declaration
                             return spanInVariableDeclaration(node.declarationList.declarations[0]);
-                        case 218 /* VariableDeclaration */:
-                        case 145 /* PropertyDeclaration */:
-                        case 144 /* PropertySignature */:
+                        case 226 /* VariableDeclaration */:
+                        case 149 /* PropertyDeclaration */:
+                        case 148 /* PropertySignature */:
                             return spanInVariableDeclaration(node);
-                        case 142 /* Parameter */:
+                        case 146 /* Parameter */:
                             return spanInParameterDeclaration(node);
-                        case 220 /* FunctionDeclaration */:
-                        case 147 /* MethodDeclaration */:
-                        case 146 /* MethodSignature */:
-                        case 149 /* GetAccessor */:
-                        case 150 /* SetAccessor */:
-                        case 148 /* Constructor */:
-                        case 179 /* FunctionExpression */:
-                        case 180 /* ArrowFunction */:
+                        case 228 /* FunctionDeclaration */:
+                        case 151 /* MethodDeclaration */:
+                        case 150 /* MethodSignature */:
+                        case 153 /* GetAccessor */:
+                        case 154 /* SetAccessor */:
+                        case 152 /* Constructor */:
+                        case 186 /* FunctionExpression */:
+                        case 187 /* ArrowFunction */:
                             return spanInFunctionDeclaration(node);
-                        case 199 /* Block */:
+                        case 207 /* Block */:
                             if (ts.isFunctionBlock(node)) {
                                 return spanInFunctionBlock(node);
                             }
-                        // Fall through
-                        case 226 /* ModuleBlock */:
+                        // falls through
+                        case 234 /* ModuleBlock */:
                             return spanInBlock(node);
-                        case 252 /* CatchClause */:
+                        case 260 /* CatchClause */:
                             return spanInBlock(node.block);
-                        case 202 /* ExpressionStatement */:
+                        case 210 /* ExpressionStatement */:
                             // span on the expression
                             return textSpan(node.expression);
-                        case 211 /* ReturnStatement */:
+                        case 219 /* ReturnStatement */:
                             // span on return keyword and expression if present
                             return textSpan(node.getChildAt(0), node.expression);
-                        case 205 /* WhileStatement */:
+                        case 213 /* WhileStatement */:
                             // Span on while(...)
                             return textSpanEndingAtNextToken(node, node.expression);
-                        case 204 /* DoStatement */:
+                        case 212 /* DoStatement */:
                             // span in statement of the do statement
                             return spanInNode(node.statement);
-                        case 217 /* DebuggerStatement */:
+                        case 225 /* DebuggerStatement */:
                             // span on debugger keyword
                             return textSpan(node.getChildAt(0));
-                        case 203 /* IfStatement */:
+                        case 211 /* IfStatement */:
                             // set on if(..) span
                             return textSpanEndingAtNextToken(node, node.expression);
-                        case 214 /* LabeledStatement */:
+                        case 222 /* LabeledStatement */:
                             // span in statement
                             return spanInNode(node.statement);
-                        case 210 /* BreakStatement */:
-                        case 209 /* ContinueStatement */:
+                        case 218 /* BreakStatement */:
+                        case 217 /* ContinueStatement */:
                             // On break or continue keyword and label if present
                             return textSpan(node.getChildAt(0), node.label);
-                        case 206 /* ForStatement */:
+                        case 214 /* ForStatement */:
                             return spanInForStatement(node);
-                        case 207 /* ForInStatement */:
+                        case 215 /* ForInStatement */:
                             // span of for (a in ...)
                             return textSpanEndingAtNextToken(node, node.expression);
-                        case 208 /* ForOfStatement */:
+                        case 216 /* ForOfStatement */:
                             // span in initializer
                             return spanInInitializerOfForLike(node);
-                        case 213 /* SwitchStatement */:
+                        case 221 /* SwitchStatement */:
                             // span on switch(...)
                             return textSpanEndingAtNextToken(node, node.expression);
-                        case 249 /* CaseClause */:
-                        case 250 /* DefaultClause */:
+                        case 257 /* CaseClause */:
+                        case 258 /* DefaultClause */:
                             // span in first statement of the clause
                             return spanInNode(node.statements[0]);
-                        case 216 /* TryStatement */:
+                        case 224 /* TryStatement */:
                             // span in try block
                             return spanInBlock(node.tryBlock);
-                        case 215 /* ThrowStatement */:
+                        case 223 /* ThrowStatement */:
                             // span in throw ...
                             return textSpan(node, node.expression);
-                        case 235 /* ExportAssignment */:
+                        case 243 /* ExportAssignment */:
                             // span on export = id
                             return textSpan(node, node.expression);
-                        case 229 /* ImportEqualsDeclaration */:
+                        case 237 /* ImportEqualsDeclaration */:
                             // import statement without including semicolon
                             return textSpan(node, node.moduleReference);
-                        case 230 /* ImportDeclaration */:
+                        case 238 /* ImportDeclaration */:
                             // import statement without including semicolon
                             return textSpan(node, node.moduleSpecifier);
-                        case 236 /* ExportDeclaration */:
+                        case 244 /* ExportDeclaration */:
                             // import statement without including semicolon
                             return textSpan(node, node.moduleSpecifier);
-                        case 225 /* ModuleDeclaration */:
+                        case 233 /* ModuleDeclaration */:
                             // span on complete module if it is instantiated
                             if (ts.getModuleInstanceState(node) !== 1 /* Instantiated */) {
                                 return undefined;
                             }
-                        case 221 /* ClassDeclaration */:
-                        case 224 /* EnumDeclaration */:
-                        case 255 /* EnumMember */:
-                        case 169 /* BindingElement */:
+                        // falls through
+                        case 229 /* ClassDeclaration */:
+                        case 232 /* EnumDeclaration */:
+                        case 264 /* EnumMember */:
+                        case 176 /* BindingElement */:
                             // span on complete node
                             return textSpan(node);
-                        case 212 /* WithStatement */:
+                        case 220 /* WithStatement */:
                             // span in statement
                             return spanInNode(node.statement);
-                        case 143 /* Decorator */:
+                        case 147 /* Decorator */:
                             return spanInNodeArray(node.parent.decorators);
-                        case 167 /* ObjectBindingPattern */:
-                        case 168 /* ArrayBindingPattern */:
+                        case 174 /* ObjectBindingPattern */:
+                        case 175 /* ArrayBindingPattern */:
                             return spanInBindingPattern(node);
                         // No breakpoint in interface, type alias
-                        case 222 /* InterfaceDeclaration */:
-                        case 223 /* TypeAliasDeclaration */:
+                        case 230 /* InterfaceDeclaration */:
+                        case 231 /* TypeAliasDeclaration */:
                             return undefined;
                         // Tokens:
-                        case 23 /* SemicolonToken */:
+                        case 25 /* SemicolonToken */:
                         case 1 /* EndOfFileToken */:
                             return spanInNodeIfStartsOnSameLine(ts.findPrecedingToken(node.pos, sourceFile));
-                        case 24 /* CommaToken */:
+                        case 26 /* CommaToken */:
                             return spanInPreviousNode(node);
-                        case 15 /* OpenBraceToken */:
+                        case 17 /* OpenBraceToken */:
                             return spanInOpenBraceToken(node);
-                        case 16 /* CloseBraceToken */:
+                        case 18 /* CloseBraceToken */:
                             return spanInCloseBraceToken(node);
-                        case 20 /* CloseBracketToken */:
+                        case 22 /* CloseBracketToken */:
                             return spanInCloseBracketToken(node);
-                        case 17 /* OpenParenToken */:
+                        case 19 /* OpenParenToken */:
                             return spanInOpenParenToken(node);
-                        case 18 /* CloseParenToken */:
+                        case 20 /* CloseParenToken */:
                             return spanInCloseParenToken(node);
-                        case 54 /* ColonToken */:
+                        case 56 /* ColonToken */:
                             return spanInColonToken(node);
-                        case 27 /* GreaterThanToken */:
-                        case 25 /* LessThanToken */:
+                        case 29 /* GreaterThanToken */:
+                        case 27 /* LessThanToken */:
                             return spanInGreaterThanOrLessThanToken(node);
                         // Keywords:
-                        case 104 /* WhileKeyword */:
+                        case 106 /* WhileKeyword */:
                             return spanInWhileKeyword(node);
-                        case 80 /* ElseKeyword */:
-                        case 72 /* CatchKeyword */:
-                        case 85 /* FinallyKeyword */:
+                        case 82 /* ElseKeyword */:
+                        case 74 /* CatchKeyword */:
+                        case 87 /* FinallyKeyword */:
                             return spanInNextNode(node);
-                        case 138 /* OfKeyword */:
+                        case 142 /* OfKeyword */:
                             return spanInOfKeyword(node);
                         default:
                             // Destructuring pattern in destructuring assignment
@@ -75104,14 +91314,14 @@ var ts;
                             // Set breakpoint on identifier element of destructuring pattern
                             // a or ...c  or d: x from
                             // [a, b, ...c] or { a, b } or { d: x } from destructuring pattern
-                            if ((node.kind === 69 /* Identifier */ ||
-                                node.kind == 191 /* SpreadElementExpression */ ||
-                                node.kind === 253 /* PropertyAssignment */ ||
-                                node.kind === 254 /* ShorthandPropertyAssignment */) &&
+                            if ((node.kind === 71 /* Identifier */ ||
+                                node.kind === 198 /* SpreadElement */ ||
+                                node.kind === 261 /* PropertyAssignment */ ||
+                                node.kind === 262 /* ShorthandPropertyAssignment */) &&
                                 ts.isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent)) {
                                 return textSpan(node);
                             }
-                            if (node.kind === 187 /* BinaryExpression */) {
+                            if (node.kind === 194 /* BinaryExpression */) {
                                 var binaryExpression = node;
                                 // Set breakpoint in destructuring pattern if its destructuring assignment
                                 // [a, b, c] or {a, b, c} of
@@ -75120,7 +91330,7 @@ var ts;
                                 if (ts.isArrayLiteralOrObjectLiteralDestructuringPattern(binaryExpression.left)) {
                                     return spanInArrayLiteralOrObjectLiteralDestructuringPattern(binaryExpression.left);
                                 }
-                                if (binaryExpression.operatorToken.kind === 56 /* EqualsToken */ &&
+                                if (binaryExpression.operatorToken.kind === 58 /* EqualsToken */ &&
                                     ts.isArrayLiteralOrObjectLiteralDestructuringPattern(binaryExpression.parent)) {
                                     // Set breakpoint on assignment expression element of destructuring pattern
                                     // a = expression of
@@ -75128,28 +91338,28 @@ var ts;
                                     // { a = expression, b, c } = someExpression
                                     return textSpan(node);
                                 }
-                                if (binaryExpression.operatorToken.kind === 24 /* CommaToken */) {
+                                if (binaryExpression.operatorToken.kind === 26 /* CommaToken */) {
                                     return spanInNode(binaryExpression.left);
                                 }
                             }
                             if (ts.isPartOfExpression(node)) {
                                 switch (node.parent.kind) {
-                                    case 204 /* DoStatement */:
+                                    case 212 /* DoStatement */:
                                         // Set span as if on while keyword
                                         return spanInPreviousNode(node);
-                                    case 143 /* Decorator */:
+                                    case 147 /* Decorator */:
                                         // Set breakpoint on the decorator emit
                                         return spanInNode(node.parent);
-                                    case 206 /* ForStatement */:
-                                    case 208 /* ForOfStatement */:
+                                    case 214 /* ForStatement */:
+                                    case 216 /* ForOfStatement */:
                                         return textSpan(node);
-                                    case 187 /* BinaryExpression */:
-                                        if (node.parent.operatorToken.kind === 24 /* CommaToken */) {
+                                    case 194 /* BinaryExpression */:
+                                        if (node.parent.operatorToken.kind === 26 /* CommaToken */) {
                                             // If this is a comma expression, the breakpoint is possible in this expression
                                             return textSpan(node);
                                         }
                                         break;
-                                    case 180 /* ArrowFunction */:
+                                    case 187 /* ArrowFunction */:
                                         if (node.parent.body === node) {
                                             // If this is body of arrow function, it is allowed to have the breakpoint
                                             return textSpan(node);
@@ -75158,13 +91368,13 @@ var ts;
                                 }
                             }
                             // If this is name of property assignment, set breakpoint in the initializer
-                            if (node.parent.kind === 253 /* PropertyAssignment */ &&
+                            if (node.parent.kind === 261 /* PropertyAssignment */ &&
                                 node.parent.name === node &&
                                 !ts.isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent.parent)) {
                                 return spanInNode(node.parent.initializer);
                             }
                             // Breakpoint in type assertion goes to its operand
-                            if (node.parent.kind === 177 /* TypeAssertionExpression */ && node.parent.type === node) {
+                            if (node.parent.kind === 184 /* TypeAssertionExpression */ && node.parent.type === node) {
                                 return spanInNextNode(node.parent.type);
                             }
                             // return type of function go to previous token
@@ -75172,8 +91382,8 @@ var ts;
                                 return spanInPreviousNode(node);
                             }
                             // initializer of variable/parameter declaration go to previous node
-                            if ((node.parent.kind === 218 /* VariableDeclaration */ ||
-                                node.parent.kind === 142 /* Parameter */)) {
+                            if ((node.parent.kind === 226 /* VariableDeclaration */ ||
+                                node.parent.kind === 146 /* Parameter */)) {
                                 var paramOrVarDecl = node.parent;
                                 if (paramOrVarDecl.initializer === node ||
                                     paramOrVarDecl.type === node ||
@@ -75181,7 +91391,7 @@ var ts;
                                     return spanInPreviousNode(node);
                                 }
                             }
-                            if (node.parent.kind === 187 /* BinaryExpression */) {
+                            if (node.parent.kind === 194 /* BinaryExpression */) {
                                 var binaryExpression = node.parent;
                                 if (ts.isArrayLiteralOrObjectLiteralDestructuringPattern(binaryExpression.left) &&
                                     (binaryExpression.right === node ||
@@ -75195,8 +91405,8 @@ var ts;
                     }
                 }
                 function textSpanFromVariableDeclaration(variableDeclaration) {
-                    var declarations = variableDeclaration.parent.declarations;
-                    if (declarations && declarations[0] === variableDeclaration) {
+                    if (variableDeclaration.parent.kind === 227 /* VariableDeclarationList */ &&
+                        variableDeclaration.parent.declarations[0] === variableDeclaration) {
                         // First declaration - include let keyword
                         return textSpan(ts.findPrecedingToken(variableDeclaration.pos, sourceFile, variableDeclaration.parent), variableDeclaration);
                     }
@@ -75207,7 +91417,7 @@ var ts;
                 }
                 function spanInVariableDeclaration(variableDeclaration) {
                     // If declaration of for in statement, just set the span in parent
-                    if (variableDeclaration.parent.parent.kind === 207 /* ForInStatement */) {
+                    if (variableDeclaration.parent.parent.kind === 215 /* ForInStatement */) {
                         return spanInNode(variableDeclaration.parent.parent);
                     }
                     // If this is a destructuring pattern, set breakpoint in binding pattern
@@ -75218,11 +91428,11 @@ var ts;
                     // or its declaration from 'for of'
                     if (variableDeclaration.initializer ||
                         ts.hasModifier(variableDeclaration, 1 /* Export */) ||
-                        variableDeclaration.parent.parent.kind === 208 /* ForOfStatement */) {
+                        variableDeclaration.parent.parent.kind === 216 /* ForOfStatement */) {
                         return textSpanFromVariableDeclaration(variableDeclaration);
                     }
-                    var declarations = variableDeclaration.parent.declarations;
-                    if (declarations && declarations[0] !== variableDeclaration) {
+                    if (variableDeclaration.parent.kind === 227 /* VariableDeclarationList */ &&
+                        variableDeclaration.parent.declarations[0] !== variableDeclaration) {
                         // If we cannot set breakpoint on this declaration, set it on previous one
                         // Because the variable declaration may be binding pattern and
                         // we would like to set breakpoint in last binding element if that's the case,
@@ -75258,7 +91468,7 @@ var ts;
                 }
                 function canFunctionHaveSpanInWholeDeclaration(functionDeclaration) {
                     return ts.hasModifier(functionDeclaration, 1 /* Export */) ||
-                        (functionDeclaration.parent.kind === 221 /* ClassDeclaration */ && functionDeclaration.kind !== 148 /* Constructor */);
+                        (functionDeclaration.parent.kind === 229 /* ClassDeclaration */ && functionDeclaration.kind !== 152 /* Constructor */);
                 }
                 function spanInFunctionDeclaration(functionDeclaration) {
                     // No breakpoints in the function signature
@@ -75281,25 +91491,26 @@ var ts;
                 }
                 function spanInBlock(block) {
                     switch (block.parent.kind) {
-                        case 225 /* ModuleDeclaration */:
+                        case 233 /* ModuleDeclaration */:
                             if (ts.getModuleInstanceState(block.parent) !== 1 /* Instantiated */) {
                                 return undefined;
                             }
+                        // falls through
                         // Set on parent if on same line otherwise on first statement
-                        case 205 /* WhileStatement */:
-                        case 203 /* IfStatement */:
-                        case 207 /* ForInStatement */:
+                        case 213 /* WhileStatement */:
+                        case 211 /* IfStatement */:
+                        case 215 /* ForInStatement */:
                             return spanInNodeIfStartsOnSameLine(block.parent, block.statements[0]);
                         // Set span on previous token if it starts on same line otherwise on the first statement of the block
-                        case 206 /* ForStatement */:
-                        case 208 /* ForOfStatement */:
+                        case 214 /* ForStatement */:
+                        case 216 /* ForOfStatement */:
                             return spanInNodeIfStartsOnSameLine(ts.findPrecedingToken(block.pos, sourceFile, block.parent), block.statements[0]);
                     }
                     // Default action is to set on first statement
                     return spanInNode(block.statements[0]);
                 }
                 function spanInInitializerOfForLike(forLikeStatement) {
-                    if (forLikeStatement.initializer.kind === 219 /* VariableDeclarationList */) {
+                    if (forLikeStatement.initializer.kind === 227 /* VariableDeclarationList */) {
                         // Declaration list - set breakpoint in first declaration
                         var variableDeclarationList = forLikeStatement.initializer;
                         if (variableDeclarationList.declarations.length > 0) {
@@ -75324,23 +91535,23 @@ var ts;
                 }
                 function spanInBindingPattern(bindingPattern) {
                     // Set breakpoint in first binding element
-                    var firstBindingElement = ts.forEach(bindingPattern.elements, function (element) { return element.kind !== 193 /* OmittedExpression */ ? element : undefined; });
+                    var firstBindingElement = ts.forEach(bindingPattern.elements, function (element) { return element.kind !== 200 /* OmittedExpression */ ? element : undefined; });
                     if (firstBindingElement) {
                         return spanInNode(firstBindingElement);
                     }
                     // Empty binding pattern of binding element, set breakpoint on binding element
-                    if (bindingPattern.parent.kind === 169 /* BindingElement */) {
+                    if (bindingPattern.parent.kind === 176 /* BindingElement */) {
                         return textSpan(bindingPattern.parent);
                     }
                     // Variable declaration is used as the span
                     return textSpanFromVariableDeclaration(bindingPattern.parent);
                 }
                 function spanInArrayLiteralOrObjectLiteralDestructuringPattern(node) {
-                    ts.Debug.assert(node.kind !== 168 /* ArrayBindingPattern */ && node.kind !== 167 /* ObjectBindingPattern */);
-                    var elements = node.kind === 170 /* ArrayLiteralExpression */ ?
+                    ts.Debug.assert(node.kind !== 175 /* ArrayBindingPattern */ && node.kind !== 174 /* ObjectBindingPattern */);
+                    var elements = node.kind === 177 /* ArrayLiteralExpression */ ?
                         node.elements :
                         node.properties;
-                    var firstBindingElement = ts.forEach(elements, function (element) { return element.kind !== 193 /* OmittedExpression */ ? element : undefined; });
+                    var firstBindingElement = ts.forEach(elements, function (element) { return element.kind !== 200 /* OmittedExpression */ ? element : undefined; });
                     if (firstBindingElement) {
                         return spanInNode(firstBindingElement);
                     }
@@ -75348,18 +91559,18 @@ var ts;
                     // just nested element in another destructuring assignment
                     // set breakpoint on assignment when parent is destructuring assignment
                     // Otherwise set breakpoint for this element
-                    return textSpan(node.parent.kind === 187 /* BinaryExpression */ ? node.parent : node);
+                    return textSpan(node.parent.kind === 194 /* BinaryExpression */ ? node.parent : node);
                 }
                 // Tokens:
                 function spanInOpenBraceToken(node) {
                     switch (node.parent.kind) {
-                        case 224 /* EnumDeclaration */:
+                        case 232 /* EnumDeclaration */:
                             var enumDeclaration = node.parent;
                             return spanInNodeIfStartsOnSameLine(ts.findPrecedingToken(node.pos, sourceFile, node.parent), enumDeclaration.members.length ? enumDeclaration.members[0] : enumDeclaration.getLastToken(sourceFile));
-                        case 221 /* ClassDeclaration */:
+                        case 229 /* ClassDeclaration */:
                             var classDeclaration = node.parent;
                             return spanInNodeIfStartsOnSameLine(ts.findPrecedingToken(node.pos, sourceFile, node.parent), classDeclaration.members.length ? classDeclaration.members[0] : classDeclaration.getLastToken(sourceFile));
-                        case 227 /* CaseBlock */:
+                        case 235 /* CaseBlock */:
                             return spanInNodeIfStartsOnSameLine(node.parent.parent, node.parent.clauses[0]);
                     }
                     // Default to parent node
@@ -75367,24 +91578,25 @@ var ts;
                 }
                 function spanInCloseBraceToken(node) {
                     switch (node.parent.kind) {
-                        case 226 /* ModuleBlock */:
+                        case 234 /* ModuleBlock */:
                             // If this is not an instantiated module block, no bp span
                             if (ts.getModuleInstanceState(node.parent.parent) !== 1 /* Instantiated */) {
                                 return undefined;
                             }
-                        case 224 /* EnumDeclaration */:
-                        case 221 /* ClassDeclaration */:
+                        // falls through
+                        case 232 /* EnumDeclaration */:
+                        case 229 /* ClassDeclaration */:
                             // Span on close brace token
                             return textSpan(node);
-                        case 199 /* Block */:
+                        case 207 /* Block */:
                             if (ts.isFunctionBlock(node.parent)) {
                                 // Span on close brace token
                                 return textSpan(node);
                             }
-                        // fall through
-                        case 252 /* CatchClause */:
+                        // falls through
+                        case 260 /* CatchClause */:
                             return spanInNode(ts.lastOrUndefined(node.parent.statements));
-                        case 227 /* CaseBlock */:
+                        case 235 /* CaseBlock */:
                             // breakpoint in last statement of the last clause
                             var caseBlock = node.parent;
                             var lastClause = ts.lastOrUndefined(caseBlock.clauses);
@@ -75392,7 +91604,7 @@ var ts;
                                 return spanInNode(ts.lastOrUndefined(lastClause.statements));
                             }
                             return undefined;
-                        case 167 /* ObjectBindingPattern */:
+                        case 174 /* ObjectBindingPattern */:
                             // Breakpoint in last binding element or binding pattern if it contains no elements
                             var bindingPattern = node.parent;
                             return spanInNode(ts.lastOrUndefined(bindingPattern.elements) || bindingPattern);
@@ -75408,7 +91620,7 @@ var ts;
                 }
                 function spanInCloseBracketToken(node) {
                     switch (node.parent.kind) {
-                        case 168 /* ArrayBindingPattern */:
+                        case 175 /* ArrayBindingPattern */:
                             // Breakpoint in last binding element or binding pattern if it contains no elements
                             var bindingPattern = node.parent;
                             return textSpan(ts.lastOrUndefined(bindingPattern.elements) || bindingPattern);
@@ -75423,12 +91635,12 @@ var ts;
                     }
                 }
                 function spanInOpenParenToken(node) {
-                    if (node.parent.kind === 204 /* DoStatement */ ||
-                        node.parent.kind === 174 /* CallExpression */ ||
-                        node.parent.kind === 175 /* NewExpression */) {
+                    if (node.parent.kind === 212 /* DoStatement */ ||
+                        node.parent.kind === 181 /* CallExpression */ ||
+                        node.parent.kind === 182 /* NewExpression */) {
                         return spanInPreviousNode(node);
                     }
-                    if (node.parent.kind === 178 /* ParenthesizedExpression */) {
+                    if (node.parent.kind === 185 /* ParenthesizedExpression */) {
                         return spanInNextNode(node);
                     }
                     // Default to parent node
@@ -75437,21 +91649,21 @@ var ts;
                 function spanInCloseParenToken(node) {
                     // Is this close paren token of parameter list, set span in previous token
                     switch (node.parent.kind) {
-                        case 179 /* FunctionExpression */:
-                        case 220 /* FunctionDeclaration */:
-                        case 180 /* ArrowFunction */:
-                        case 147 /* MethodDeclaration */:
-                        case 146 /* MethodSignature */:
-                        case 149 /* GetAccessor */:
-                        case 150 /* SetAccessor */:
-                        case 148 /* Constructor */:
-                        case 205 /* WhileStatement */:
-                        case 204 /* DoStatement */:
-                        case 206 /* ForStatement */:
-                        case 208 /* ForOfStatement */:
-                        case 174 /* CallExpression */:
-                        case 175 /* NewExpression */:
-                        case 178 /* ParenthesizedExpression */:
+                        case 186 /* FunctionExpression */:
+                        case 228 /* FunctionDeclaration */:
+                        case 187 /* ArrowFunction */:
+                        case 151 /* MethodDeclaration */:
+                        case 150 /* MethodSignature */:
+                        case 153 /* GetAccessor */:
+                        case 154 /* SetAccessor */:
+                        case 152 /* Constructor */:
+                        case 213 /* WhileStatement */:
+                        case 212 /* DoStatement */:
+                        case 214 /* ForStatement */:
+                        case 216 /* ForOfStatement */:
+                        case 181 /* CallExpression */:
+                        case 182 /* NewExpression */:
+                        case 185 /* ParenthesizedExpression */:
                             return spanInPreviousNode(node);
                         // Default to parent node
                         default:
@@ -75461,20 +91673,20 @@ var ts;
                 function spanInColonToken(node) {
                     // Is this : specifying return annotation of the function declaration
                     if (ts.isFunctionLike(node.parent) ||
-                        node.parent.kind === 253 /* PropertyAssignment */ ||
-                        node.parent.kind === 142 /* Parameter */) {
+                        node.parent.kind === 261 /* PropertyAssignment */ ||
+                        node.parent.kind === 146 /* Parameter */) {
                         return spanInPreviousNode(node);
                     }
                     return spanInNode(node.parent);
                 }
                 function spanInGreaterThanOrLessThanToken(node) {
-                    if (node.parent.kind === 177 /* TypeAssertionExpression */) {
+                    if (node.parent.kind === 184 /* TypeAssertionExpression */) {
                         return spanInNextNode(node);
                     }
                     return spanInNode(node.parent);
                 }
                 function spanInWhileKeyword(node) {
-                    if (node.parent.kind === 204 /* DoStatement */) {
+                    if (node.parent.kind === 212 /* DoStatement */) {
                         // Set span on while expression
                         return textSpanEndingAtNextToken(node, node.parent.expression);
                     }
@@ -75482,7 +91694,7 @@ var ts;
                     return spanInNode(node.parent);
                 }
                 function spanInOfKeyword(node) {
-                    if (node.parent.kind === 208 /* ForOfStatement */) {
+                    if (node.parent.kind === 216 /* ForOfStatement */) {
                         // Set using next token
                         return spanInNextNode(node);
                     }
@@ -75535,8 +91747,7 @@ var ts;
         ScriptSnapshotShimAdapter.prototype.getChangeRange = function (oldSnapshot) {
             var oldSnapshotShim = oldSnapshot;
             var encoded = this.scriptSnapshotShim.getChangeRange(oldSnapshotShim.scriptSnapshotShim);
-            // TODO: should this be '==='?
-            if (encoded == null) {
+            if (encoded === null) {
                 return null;
             }
             var decoded = JSON.parse(encoded);
@@ -75564,7 +91775,7 @@ var ts;
                     var resolutionsInFile = JSON.parse(_this.shimHost.getModuleResolutionsForFile(containingFile));
                     return ts.map(moduleNames, function (name) {
                         var result = ts.getProperty(resolutionsInFile, name);
-                        return result ? { resolvedFileName: result } : undefined;
+                        return result ? { resolvedFileName: result, extension: ts.extensionFromPath(result), isExternalLibraryImport: false } : undefined;
                     });
                 };
             }
@@ -75609,11 +91820,13 @@ var ts;
         };
         LanguageServiceShimHostAdapter.prototype.getCompilationSettings = function () {
             var settingsJson = this.shimHost.getCompilationSettings();
-            // TODO: should this be '==='?
-            if (settingsJson == null || settingsJson == "") {
+            if (settingsJson === null || settingsJson === "") {
                 throw Error("LanguageServiceShimHostAdapter.getCompilationSettings: empty compilationSettings");
             }
-            return JSON.parse(settingsJson);
+            var compilerOptions = JSON.parse(settingsJson);
+            // permit language service to handle all files (filtering should be performed on the host side)
+            compilerOptions.allowNonTsExtensions = true;
+            return compilerOptions;
         };
         LanguageServiceShimHostAdapter.prototype.getScriptFileNames = function () {
             var encoded = this.shimHost.getScriptFileNames();
@@ -75636,7 +91849,7 @@ var ts;
         };
         LanguageServiceShimHostAdapter.prototype.getLocalizedDiagnosticMessages = function () {
             var diagnosticMessagesJson = this.shimHost.getLocalizedDiagnosticMessages();
-            if (diagnosticMessagesJson == null || diagnosticMessagesJson == "") {
+            if (diagnosticMessagesJson === null || diagnosticMessagesJson === "") {
                 return null;
             }
             try {
@@ -75649,7 +91862,7 @@ var ts;
         };
         LanguageServiceShimHostAdapter.prototype.getCancellationToken = function () {
             var hostCancellationToken = this.shimHost.getCancellationToken();
-            return new ThrottledCancellationToken(hostCancellationToken);
+            return new ts.ThrottledCancellationToken(hostCancellationToken);
         };
         LanguageServiceShimHostAdapter.prototype.getCurrentDirectory = function () {
             return this.shimHost.getCurrentDirectory();
@@ -75661,7 +91874,7 @@ var ts;
             return this.shimHost.getDefaultLibFileName(JSON.stringify(options));
         };
         LanguageServiceShimHostAdapter.prototype.readDirectory = function (path, extensions, exclude, include, depth) {
-            var pattern = ts.getFileMatcherPatterns(path, extensions, exclude, include, this.shimHost.useCaseSensitiveFileNames(), this.shimHost.getCurrentDirectory());
+            var pattern = ts.getFileMatcherPatterns(path, exclude, include, this.shimHost.useCaseSensitiveFileNames(), this.shimHost.getCurrentDirectory());
             return JSON.parse(this.shimHost.readDirectory(path, JSON.stringify(extensions), JSON.stringify(pattern.basePaths), pattern.excludePattern, pattern.includeFilePattern, pattern.includeDirectoryPattern, depth));
         };
         LanguageServiceShimHostAdapter.prototype.readFile = function (path, encoding) {
@@ -75673,27 +91886,6 @@ var ts;
         return LanguageServiceShimHostAdapter;
     }());
     ts.LanguageServiceShimHostAdapter = LanguageServiceShimHostAdapter;
-    /** A cancellation that throttles calls to the host */
-    var ThrottledCancellationToken = (function () {
-        function ThrottledCancellationToken(hostCancellationToken) {
-            this.hostCancellationToken = hostCancellationToken;
-            // Store when we last tried to cancel.  Checking cancellation can be expensive (as we have
-            // to marshall over to the host layer).  So we only bother actually checking once enough
-            // time has passed.
-            this.lastCancellationCheckTime = 0;
-        }
-        ThrottledCancellationToken.prototype.isCancellationRequested = function () {
-            var time = ts.timestamp();
-            var duration = Math.abs(time - this.lastCancellationCheckTime);
-            if (duration > 10) {
-                // Check no more than once every 10 ms.
-                this.lastCancellationCheckTime = time;
-                return this.hostCancellationToken.isCancellationRequested();
-            }
-            return false;
-        };
-        return ThrottledCancellationToken;
-    }());
     var CoreServicesShimHostAdapter = (function () {
         function CoreServicesShimHostAdapter(shimHost) {
             var _this = this;
@@ -75710,7 +91902,7 @@ var ts;
             // Wrap the API changes for 2.0 release. This try/catch
             // should be removed once TypeScript 2.0 has shipped.
             try {
-                var pattern = ts.getFileMatcherPatterns(rootDir, extensions, exclude, include, this.shimHost.useCaseSensitiveFileNames(), this.shimHost.getCurrentDirectory());
+                var pattern = ts.getFileMatcherPatterns(rootDir, exclude, include, this.shimHost.useCaseSensitiveFileNames(), this.shimHost.getCurrentDirectory());
                 return JSON.parse(this.shimHost.readDirectory(rootDir, JSON.stringify(extensions), JSON.stringify(pattern.basePaths), pattern.excludePattern, pattern.includeFilePattern, pattern.includeDirectoryPattern, depth));
             }
             catch (e) {
@@ -75784,7 +91976,7 @@ var ts;
             this.factory = factory;
             factory.registerShim(this);
         }
-        ShimBase.prototype.dispose = function (dummy) {
+        ShimBase.prototype.dispose = function (_dummy) {
             this.factory.unregisterShim(this);
         };
         return ShimBase;
@@ -75806,11 +91998,12 @@ var ts;
     var LanguageServiceShimObject = (function (_super) {
         __extends(LanguageServiceShimObject, _super);
         function LanguageServiceShimObject(factory, host, languageService) {
-            _super.call(this, factory);
-            this.host = host;
-            this.languageService = languageService;
-            this.logPerformance = false;
-            this.logger = this.host;
+            var _this = _super.call(this, factory) || this;
+            _this.host = host;
+            _this.languageService = languageService;
+            _this.logPerformance = false;
+            _this.logger = _this.host;
+            return _this;
         }
         LanguageServiceShimObject.prototype.forwardJSONCall = function (actionDescription, action) {
             return forwardJSONCall(this.logger, actionDescription, action, this.logPerformance);
@@ -76048,6 +92241,10 @@ var ts;
             var _this = this;
             return this.forwardJSONCall("getNavigationBarItems('" + fileName + "')", function () { return _this.languageService.getNavigationBarItems(fileName); });
         };
+        LanguageServiceShimObject.prototype.getNavigationTree = function (fileName) {
+            var _this = this;
+            return this.forwardJSONCall("getNavigationTree('" + fileName + "')", function () { return _this.languageService.getNavigationTree(fileName); });
+        };
         LanguageServiceShimObject.prototype.getOutliningSpans = function (fileName) {
             var _this = this;
             return this.forwardJSONCall("getOutliningSpans('" + fileName + "')", function () { return _this.languageService.getOutliningSpans(fileName); });
@@ -76074,10 +92271,11 @@ var ts;
     var ClassifierShimObject = (function (_super) {
         __extends(ClassifierShimObject, _super);
         function ClassifierShimObject(factory, logger) {
-            _super.call(this, factory);
-            this.logger = logger;
-            this.logPerformance = false;
-            this.classifier = ts.createClassifier();
+            var _this = _super.call(this, factory) || this;
+            _this.logger = logger;
+            _this.logPerformance = false;
+            _this.classifier = ts.createClassifier();
+            return _this;
         }
         ClassifierShimObject.prototype.getEncodedLexicalClassifications = function (text, lexState, syntacticClassifierAbsent) {
             var _this = this;
@@ -76100,10 +92298,11 @@ var ts;
     var CoreServicesShimObject = (function (_super) {
         __extends(CoreServicesShimObject, _super);
         function CoreServicesShimObject(factory, logger, host) {
-            _super.call(this, factory);
-            this.logger = logger;
-            this.host = host;
-            this.logPerformance = false;
+            var _this = _super.call(this, factory) || this;
+            _this.logger = logger;
+            _this.host = host;
+            _this.logPerformance = false;
+            return _this;
         }
         CoreServicesShimObject.prototype.forwardJSONCall = function (actionDescription, action) {
             return forwardJSONCall(this.logger, actionDescription, action, this.logPerformance);
@@ -76113,8 +92312,12 @@ var ts;
             return this.forwardJSONCall("resolveModuleName('" + fileName + "')", function () {
                 var compilerOptions = JSON.parse(compilerOptionsJson);
                 var result = ts.resolveModuleName(moduleName, ts.normalizeSlashes(fileName), compilerOptions, _this.host);
+                var resolvedFileName = result.resolvedModule ? result.resolvedModule.resolvedFileName : undefined;
+                if (result.resolvedModule && result.resolvedModule.extension !== ".ts" /* Ts */ && result.resolvedModule.extension !== ".tsx" /* Tsx */ && result.resolvedModule.extension !== ".d.ts" /* Dts */) {
+                    resolvedFileName = undefined;
+                }
                 return {
-                    resolvedFileName: result.resolvedModule ? result.resolvedModule.resolvedFileName : undefined,
+                    resolvedFileName: resolvedFileName,
                     failedLookupLocations: result.failedLookupLocations
                 };
             });
@@ -76171,24 +92374,15 @@ var ts;
             var _this = this;
             return this.forwardJSONCall("getTSConfigFileInfo('" + fileName + "')", function () {
                 var text = sourceTextSnapshot.getText(0, sourceTextSnapshot.getLength());
-                var result = ts.parseConfigFileTextToJson(fileName, text);
-                if (result.error) {
-                    return {
-                        options: {},
-                        typingOptions: {},
-                        files: [],
-                        raw: {},
-                        errors: [realizeDiagnostic(result.error, "\r\n")]
-                    };
-                }
+                var result = ts.parseJsonText(fileName, text);
                 var normalizedFileName = ts.normalizeSlashes(fileName);
-                var configFile = ts.parseJsonConfigFileContent(result.config, _this.host, ts.getDirectoryPath(normalizedFileName), /*existingOptions*/ {}, normalizedFileName);
+                var configFile = ts.parseJsonSourceFileConfigFileContent(result, _this.host, ts.getDirectoryPath(normalizedFileName), /*existingOptions*/ {}, normalizedFileName);
                 return {
                     options: configFile.options,
-                    typingOptions: configFile.typingOptions,
+                    typeAcquisition: configFile.typeAcquisition,
                     files: configFile.fileNames,
                     raw: configFile.raw,
-                    errors: realizeDiagnostics(configFile.errors, "\r\n")
+                    errors: realizeDiagnostics(result.parseDiagnostics.concat(configFile.errors), "\r\n")
                 };
             });
         };
@@ -76200,7 +92394,7 @@ var ts;
             var getCanonicalFileName = ts.createGetCanonicalFileName(/*useCaseSensitivefileNames:*/ false);
             return this.forwardJSONCall("discoverTypings()", function () {
                 var info = JSON.parse(discoverTypingsJson);
-                return ts.JsTyping.discoverTypings(_this.host, info.fileNames, ts.toPath(info.projectRootPath, info.projectRootPath, getCanonicalFileName), ts.toPath(info.safeListPath, info.safeListPath, getCanonicalFileName), info.packageNameToTypingLocation, info.typingOptions, info.compilerOptions);
+                return ts.JsTyping.discoverTypings(_this.host, info.fileNames, ts.toPath(info.projectRootPath, info.projectRootPath, getCanonicalFileName), ts.toPath(info.safeListPath, info.safeListPath, getCanonicalFileName), info.packageNameToTypingLocation, info.typeAcquisition, info.unresolvedImports);
             });
         };
         return CoreServicesShimObject;
@@ -76257,7 +92451,7 @@ var ts;
             this._shims.push(shim);
         };
         TypeScriptServicesFactory.prototype.unregisterShim = function (shim) {
-            for (var i = 0, n = this._shims.length; i < n; i++) {
+            for (var i = 0; i < this._shims.length; i++) {
                 if (this._shims[i] === shim) {
                     delete this._shims[i];
                     return;
@@ -76283,12 +92477,10 @@ var TypeScript;
         Services.TypeScriptServicesFactory = ts.TypeScriptServicesFactory;
     })(Services = TypeScript.Services || (TypeScript.Services = {}));
 })(TypeScript || (TypeScript = {}));
-/* tslint:disable:no-unused-variable */
 // 'toolsVersion' gets consumed by the managed side, so it's not unused.
 // TODO: it should be moved into a namespace though.
 /* @internal */
-var toolsVersion = "2.1";
-/* tslint:enable:no-unused-variable */
+var toolsVersion = "2.5";
 /**
  * Sample: add a new utility function
  */
diff --git a/extensions/addExtensions.js b/extensions/addExtensions.js
index af3d395..1195d92 100644
--- a/extensions/addExtensions.js
+++ b/extensions/addExtensions.js
@@ -1,4 +1,5 @@
 "use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
 var fs = require('fs');
 var EOL = require('os').EOL;
 function readFile(filePath) {
diff --git a/extensions/preBuild.js b/extensions/preBuild.js
index a680c6d..430525b 100644
--- a/extensions/preBuild.js
+++ b/extensions/preBuild.js
@@ -1,4 +1,5 @@
 "use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
 var fs = require('fs');
 var EOL = require('os').EOL;
 function readFile(filePath) {
diff --git a/kicktravis b/kicktravis
index 5167cbf..742563f 100644
--- a/kicktravis
+++ b/kicktravis
@@ -1 +1 @@
-2016-09-30 [ci skip] Version: 1.201609302242.1+c302893a6201cbd822d6040b8361ad7a0ee506fa
+2017-06-19 [ci skip] Version: 1.201706190042.1+a2776648cd48d4937b076fb8b3e935d3d5fb27e1
diff --git a/package.json b/package.json
index 9ebc48a..448d91e 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ntypescript",
-  "version": "1.201609302242.1+c302893a6201cbd822d6040b8361ad7a0ee506fa",
+  "version": "1.201706190042.1+a2776648cd48d4937b076fb8b3e935d3d5fb27e1",
   "description": "A nicer version of microsoft/typescript packaged and released for API developers",
   "main": "./bin/ntypescript.js",
   "bin": {
diff --git a/src/compiler/binder.ts b/src/compiler/binder.ts
index e2d3116..59dd061 100644
--- a/src/compiler/binder.ts
+++ b/src/compiler/binder.ts
@@ -54,6 +54,11 @@ namespace ts {
             const body = (<ModuleDeclaration>node).body;
             return body ? getModuleInstanceState(body) : ModuleInstanceState.Instantiated;
         }
+        // Only jsdoc typedef definition can exist in jsdoc namespace, and it should
+        // be considered the same as type alias
+        else if (node.kind === SyntaxKind.Identifier && (<Identifier>node).isInJSDocNamespace) {
+            return ModuleInstanceState.NonInstantiated;
+        }
         else {
             return ModuleInstanceState.Instantiated;
         }
@@ -84,6 +89,7 @@ namespace ts {
         IsFunctionExpression = 1 << 4,
         HasLocals = 1 << 5,
         IsInterface = 1 << 6,
+        IsObjectLiteralOrClassExpressionMethod = 1 << 7,
     }
 
     const binder = createBinder();
@@ -121,7 +127,8 @@ namespace ts {
 
         // If this file is an external module, then it is automatically in strict-mode according to
         // ES6.  If it is not an external module, then we'll determine if it is in strict mode or
-        // not depending on if we see "use strict" in certain places (or if we hit a class/namespace).
+        // not depending on if we see "use strict" in certain places or if we hit a class/namespace
+        // or if compiler options contain alwaysStrict.
         let inStrictMode: boolean;
 
         let symbolCount = 0;
@@ -139,10 +146,10 @@ namespace ts {
             file = f;
             options = opts;
             languageVersion = getEmitScriptTarget(options);
-            inStrictMode = !!file.externalModuleIndicator;
+            inStrictMode = bindInStrictMode(file, opts);
             classifiableNames = createMap<string>();
             symbolCount = 0;
-            skipTransformFlagAggregation = isDeclarationFile(file);
+            skipTransformFlagAggregation = file.isDeclarationFile;
 
             Symbol = objectAllocator.getSymbolConstructor();
 
@@ -174,6 +181,16 @@ namespace ts {
 
         return bindSourceFile;
 
+        function bindInStrictMode(file: SourceFile, opts: CompilerOptions): boolean {
+            if ((opts.alwaysStrict === undefined ? opts.strict : opts.alwaysStrict) && !file.isDeclarationFile) {
+                // bind in strict mode source files with alwaysStrict option
+                return true;
+            }
+            else {
+                return !!file.externalModuleIndicator;
+            }
+        }
+
         function createSymbol(flags: SymbolFlags, name: string): Symbol {
             symbolCount++;
             return new Symbol(flags, name);
@@ -204,27 +221,28 @@ namespace ts {
                     // other kinds of value declarations take precedence over modules
                     symbol.valueDeclaration = node;
                 }
-        }
+            }
         }
 
         // Should not be called on a declaration with a computed property name,
         // unless it is a well known Symbol.
         function getDeclarationName(node: Declaration): string {
-            if (node.name) {
+            const name = getNameOfDeclaration(node);
+            if (name) {
                 if (isAmbientModule(node)) {
-                    return isGlobalScopeAugmentation(<ModuleDeclaration>node) ? "__global" : `"${(<LiteralExpression>node.name).text}"`;
+                    return isGlobalScopeAugmentation(<ModuleDeclaration>node) ? "__global" : `"${(<LiteralExpression>name).text}"`;
                 }
-                if (node.name.kind === SyntaxKind.ComputedPropertyName) {
-                    const nameExpression = (<ComputedPropertyName>node.name).expression;
+                if (name.kind === SyntaxKind.ComputedPropertyName) {
+                    const nameExpression = (<ComputedPropertyName>name).expression;
                     // treat computed property names where expression is string/numeric literal as just string/numeric literal
-                    if (isStringOrNumericLiteral(nameExpression.kind)) {
-                        return (<LiteralExpression>nameExpression).text;
+                    if (isStringOrNumericLiteral(nameExpression)) {
+                        return nameExpression.text;
                     }
 
                     Debug.assert(isWellKnownSymbolSyntactically(nameExpression));
                     return getPropertyNameForKnownSymbolName((<PropertyAccessExpression>nameExpression).name.text);
                 }
-                return (<Identifier | LiteralExpression>node.name).text;
+                return (<Identifier | LiteralExpression>name).text;
             }
             switch (node.kind) {
                 case SyntaxKind.Constructor:
@@ -242,17 +260,9 @@ namespace ts {
                 case SyntaxKind.ExportAssignment:
                     return (<ExportAssignment>node).isExportEquals ? "export=" : "default";
                 case SyntaxKind.BinaryExpression:
-                    switch (getSpecialPropertyAssignmentKind(node)) {
-                        case SpecialPropertyAssignmentKind.ModuleExports:
-                            // module.exports = ...
-                            return "export=";
-                        case SpecialPropertyAssignmentKind.ExportsProperty:
-                        case SpecialPropertyAssignmentKind.ThisProperty:
-                            // exports.x = ... or this.y = ...
-                            return ((node as BinaryExpression).left as PropertyAccessExpression).name.text;
-                        case SpecialPropertyAssignmentKind.PrototypeProperty:
-                            // className.prototype.methodName = ...
-                            return (((node as BinaryExpression).left as PropertyAccessExpression).expression as PropertyAccessExpression).name.text;
+                    if (getSpecialPropertyAssignmentKind(node as BinaryExpression) === SpecialPropertyAssignmentKind.ModuleExports) {
+                        // module.exports = ...
+                        return "export=";
                     }
                     Debug.fail("Unknown binary declaration kind");
                     break;
@@ -266,8 +276,8 @@ namespace ts {
                     // Parameters with names are handled at the top of this function.  Parameters
                     // without names can only come from JSDocFunctionTypes.
                     Debug.assert(node.parent.kind === SyntaxKind.JSDocFunctionType);
-                    let functionType = <JSDocFunctionType>node.parent;
-                    let index = indexOf(functionType.parameters, node);
+                    const functionType = <JSDocFunctionType>node.parent;
+                    const index = indexOf(functionType.parameters, node);
                     return "arg" + index;
                 case SyntaxKind.JSDocTypedefTag:
                     const parentNode = node.parent && node.parent.parent;
@@ -285,7 +295,7 @@ namespace ts {
         }
 
         function getDisplayName(node: Declaration): string {
-            return node.name ? declarationNameToString(node.name) : getDeclarationName(node);
+            return (node as NamedDeclaration).name ? declarationNameToString((node as NamedDeclaration).name) : getDeclarationName(node);
         }
 
         /**
@@ -332,21 +342,24 @@ namespace ts {
                 // Otherwise, we'll be merging into a compatible existing symbol (for example when
                 // you have multiple 'vars' with the same name in the same container).  In this case
                 // just add this node into the declarations list of the symbol.
-                symbol = symbolTable[name] || (symbolTable[name] = createSymbol(SymbolFlags.None, name));
+                symbol = symbolTable.get(name);
+                if (!symbol) {
+                    symbolTable.set(name, symbol = createSymbol(SymbolFlags.None, name));
+                }
 
                 if (name && (includes & SymbolFlags.Classifiable)) {
-                    classifiableNames[name] = name;
+                    classifiableNames.set(name, name);
                 }
 
                 if (symbol.flags & excludes) {
                     if (symbol.isReplaceableByMethod) {
                         // Javascript constructor-declared symbols can be discarded in favor of
                         // prototype symbols like methods.
-                        symbol = symbolTable[name] = createSymbol(SymbolFlags.None, name);
+                        symbolTable.set(name, symbol = createSymbol(SymbolFlags.None, name));
                     }
                     else {
-                        if (node.name) {
-                            node.name.parent = node;
+                        if ((node as NamedDeclaration).name) {
+                            (node as NamedDeclaration).name.parent = node;
                         }
 
                         // Report errors every position with duplicate declaration
@@ -355,16 +368,29 @@ namespace ts {
                             ? Diagnostics.Cannot_redeclare_block_scoped_variable_0
                             : Diagnostics.Duplicate_identifier_0;
 
-                        forEach(symbol.declarations, declaration => {
-                            if (hasModifier(declaration, ModifierFlags.Default)) {
+                        if (symbol.declarations && symbol.declarations.length) {
+                            // If the current node is a default export of some sort, then check if
+                            // there are any other default exports that we need to error on.
+                            // We'll know whether we have other default exports depending on if `symbol` already has a declaration list set.
+                            if (isDefaultExport) {
                                 message = Diagnostics.A_module_cannot_have_multiple_default_exports;
                             }
-                        });
+                            else {
+                                // This is to properly report an error in the case "export default { }" is after export default of class declaration or function declaration.
+                                // Error on multiple export default in the following case:
+                                // 1. multiple export default of class declaration or function declaration by checking NodeFlags.Default
+                                // 2. multiple export default of export assignment. This one doesn't have NodeFlags.Default on (as export default doesn't considered as modifiers)
+                                if (symbol.declarations && symbol.declarations.length &&
+                                    (isDefaultExport || (node.kind === SyntaxKind.ExportAssignment && !(<ExportAssignment>node).isExportEquals))) {
+                                    message = Diagnostics.A_module_cannot_have_multiple_default_exports;
+                                }
+                            }
+                        }
 
                         forEach(symbol.declarations, declaration => {
-                            file.bindDiagnostics.push(createDiagnosticForNode(declaration.name || declaration, message, getDisplayName(declaration)));
+                            file.bindDiagnostics.push(createDiagnosticForNode(getNameOfDeclaration(declaration) || declaration, message, getDisplayName(declaration)));
                         });
-                        file.bindDiagnostics.push(createDiagnosticForNode(node.name || node, message, getDisplayName(node)));
+                        file.bindDiagnostics.push(createDiagnosticForNode(getNameOfDeclaration(node) || node, message, getDisplayName(node)));
 
                         symbol = createSymbol(SymbolFlags.None, name);
                     }
@@ -384,7 +410,7 @@ namespace ts {
                     return declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
                 }
                 else {
-                    return declareSymbol(container.locals, undefined, node, symbolFlags, symbolExcludes);
+                    return declareSymbol(container.locals, /*parent*/ undefined, node, symbolFlags, symbolExcludes);
                 }
             }
             else {
@@ -404,18 +430,23 @@ namespace ts {
                 //       during global merging in the checker. Why? The only case when ambient module is permitted inside another module is module augmentation
                 //       and this case is specially handled. Module augmentations should only be merged with original module definition
                 //       and should never be merged directly with other augmentation, and the latter case would be possible if automatic merge is allowed.
-                if (!isAmbientModule(node) && (hasExportModifier || container.flags & NodeFlags.ExportContext)) {
+                if (node.kind === SyntaxKind.JSDocTypedefTag) Debug.assert(isInJavaScriptFile(node)); // We shouldn't add symbols for JSDoc nodes if not in a JS file.
+                const isJSDocTypedefInJSDocNamespace = node.kind === SyntaxKind.JSDocTypedefTag &&
+                    (node as JSDocTypedefTag).name &&
+                    (node as JSDocTypedefTag).name.kind === SyntaxKind.Identifier &&
+                    ((node as JSDocTypedefTag).name as Identifier).isInJSDocNamespace;
+                if ((!isAmbientModule(node) && (hasExportModifier || container.flags & NodeFlags.ExportContext)) || isJSDocTypedefInJSDocNamespace) {
                     const exportKind =
                         (symbolFlags & SymbolFlags.Value ? SymbolFlags.ExportValue : 0) |
                         (symbolFlags & SymbolFlags.Type ? SymbolFlags.ExportType : 0) |
                         (symbolFlags & SymbolFlags.Namespace ? SymbolFlags.ExportNamespace : 0);
-                    const local = declareSymbol(container.locals, undefined, node, exportKind, symbolExcludes);
+                    const local = declareSymbol(container.locals, /*parent*/ undefined, node, exportKind, symbolExcludes);
                     local.exportSymbol = declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
                     node.localSymbol = local;
                     return local;
                 }
                 else {
-                    return declareSymbol(container.locals, undefined, node, symbolFlags, symbolExcludes);
+                    return declareSymbol(container.locals, /*parent*/ undefined, node, symbolFlags, symbolExcludes);
                 }
             }
         }
@@ -465,16 +496,16 @@ namespace ts {
                 const saveReturnTarget = currentReturnTarget;
                 const saveActiveLabels = activeLabels;
                 const saveHasExplicitReturn = hasExplicitReturn;
-                const isIIFE = containerFlags & ContainerFlags.IsFunctionExpression && !!getImmediatelyInvokedFunctionExpression(node);
-                // An IIFE is considered part of the containing control flow. Return statements behave
+                const isIIFE = containerFlags & ContainerFlags.IsFunctionExpression && !hasModifier(node, ModifierFlags.Async) && !!getImmediatelyInvokedFunctionExpression(node);
+                // A non-async IIFE is considered part of the containing control flow. Return statements behave
                 // similarly to break statements that exit to a label just past the statement body.
                 if (isIIFE) {
                     currentReturnTarget = createBranchLabel();
                 }
                 else {
                     currentFlow = { flags: FlowFlags.Start };
-                    if (containerFlags & ContainerFlags.IsFunctionExpression) {
-                        (<FlowStart>currentFlow).container = <FunctionExpression | ArrowFunction>node;
+                    if (containerFlags & (ContainerFlags.IsFunctionExpression | ContainerFlags.IsObjectLiteralOrClassExpressionMethod)) {
+                        (<FlowStart>currentFlow).container = <FunctionExpression | ArrowFunction | MethodDeclaration>node;
                     }
                     currentReturnTarget = undefined;
                 }
@@ -484,7 +515,6 @@ namespace ts {
                 hasExplicitReturn = false;
                 bindChildren(node);
                 // Reset all reachability check related flags on node (for incremental scenarios)
-                // Reset all emit helper flags on node (for incremental scenarios)
                 node.flags &= ~NodeFlags.ReachabilityAndEmitFlags;
                 if (!(currentFlow.flags & FlowFlags.Unreachable) && containerFlags & ContainerFlags.IsFunctionLike && nodeIsPresent((<FunctionLikeDeclaration>node).body)) {
                     node.flags |= NodeFlags.HasImplicitReturn;
@@ -526,6 +556,7 @@ namespace ts {
                 skipTransformFlagAggregation = true;
                 bindChildrenWorker(node);
                 skipTransformFlagAggregation = false;
+                subtreeTransformFlags |= node.transformFlags & ~getTransformFlagsSubtreeExclusions(node.kind);
             }
             else {
                 const savedSubtreeTransformFlags = subtreeTransformFlags;
@@ -535,15 +566,50 @@ namespace ts {
             }
         }
 
+        function bindEach(nodes: NodeArray<Node>) {
+            if (nodes === undefined) {
+                return;
+            }
+
+            if (skipTransformFlagAggregation) {
+                forEach(nodes, bind);
+            }
+            else {
+                const savedSubtreeTransformFlags = subtreeTransformFlags;
+                subtreeTransformFlags = TransformFlags.None;
+                let nodeArrayFlags = TransformFlags.None;
+                for (const node of nodes) {
+                    bind(node);
+                    nodeArrayFlags |= node.transformFlags & ~TransformFlags.HasComputedFlags;
+                }
+                nodes.transformFlags = nodeArrayFlags | TransformFlags.HasComputedFlags;
+                subtreeTransformFlags |= savedSubtreeTransformFlags;
+            }
+        }
+
+        function bindEachChild(node: Node) {
+            forEachChild(node, bind, bindEach);
+        }
+
         function bindChildrenWorker(node: Node): void {
             // Binding of JsDocComment should be done before the current block scope container changes.
             // because the scope of JsDocComment should not be affected by whether the current node is a
             // container or not.
-            if (isInJavaScriptFile(node) && node.jsDocComments) {
-                forEach(node.jsDocComments, bind);
+            if (node.jsDoc) {
+                if (isInJavaScriptFile(node)) {
+                    for (const j of node.jsDoc) {
+                        bind(j);
+                    }
+                }
+                else {
+                    for (const j of node.jsDoc) {
+                        setParentPointers(node, j);
+                    }
+                }
             }
+
             if (checkUnreachable(node)) {
-                forEachChild(node, bind);
+                bindEachChild(node);
                 return;
             }
             switch (node.kind) {
@@ -558,7 +624,7 @@ namespace ts {
                     break;
                 case SyntaxKind.ForInStatement:
                 case SyntaxKind.ForOfStatement:
-                    bindForInOrForOfStatement(<ForInStatement | ForOfStatement>node);
+                    bindForInOrForOfStatement(<ForInOrOfStatement>node);
                     break;
                 case SyntaxKind.IfStatement:
                     bindIfStatement(<IfStatement>node);
@@ -607,8 +673,14 @@ namespace ts {
                 case SyntaxKind.CallExpression:
                     bindCallExpressionFlow(<CallExpression>node);
                     break;
+                case SyntaxKind.JSDocComment:
+                    bindJSDocComment(<JSDoc>node);
+                    break;
+                case SyntaxKind.JSDocTypedefTag:
+                    bindJSDocTypedefTag(<JSDocTypedefTag>node);
+                    break;
                 default:
-                    forEachChild(node, bind);
+                    bindEachChild(node);
                     break;
             }
         }
@@ -634,6 +706,7 @@ namespace ts {
         function isNarrowableReference(expr: Expression): boolean {
             return expr.kind === SyntaxKind.Identifier ||
                 expr.kind === SyntaxKind.ThisKeyword ||
+                expr.kind === SyntaxKind.SuperKeyword ||
                 expr.kind === SyntaxKind.PropertyAccessExpression && isNarrowableReference((<PropertyAccessExpression>expr).expression);
         }
 
@@ -760,6 +833,15 @@ namespace ts {
             };
         }
 
+        function createFlowArrayMutation(antecedent: FlowNode, node: CallExpression | BinaryExpression): FlowNode {
+            setFlowNodeReferenced(antecedent);
+            return <FlowArrayMutation>{
+                flags: FlowFlags.ArrayMutation,
+                antecedent,
+                node
+            };
+        }
+
         function finishFlowLabel(flow: FlowLabel): FlowNode {
             const antecedents = flow.antecedents;
             if (!antecedents) {
@@ -849,8 +931,13 @@ namespace ts {
 
         function bindDoStatement(node: DoStatement): void {
             const preDoLabel = createLoopLabel();
-            const preConditionLabel = createBranchLabel();
-            const postDoLabel = createBranchLabel();
+            const enclosingLabeledStatement = node.parent.kind === SyntaxKind.LabeledStatement
+                ? lastOrUndefined(activeLabels)
+                : undefined;
+            // if do statement is wrapped in labeled statement then target labels for break/continue with or without
+            // label should be the same
+            const preConditionLabel = enclosingLabeledStatement ? enclosingLabeledStatement.continueTarget : createBranchLabel();
+            const postDoLabel = enclosingLabeledStatement ? enclosingLabeledStatement.breakTarget : createBranchLabel();
             addAntecedent(preDoLabel, currentFlow);
             currentFlow = preDoLabel;
             bindIterativeStatement(node.statement, postDoLabel, preConditionLabel);
@@ -875,11 +962,14 @@ namespace ts {
             currentFlow = finishFlowLabel(postLoopLabel);
         }
 
-        function bindForInOrForOfStatement(node: ForInStatement | ForOfStatement): void {
+        function bindForInOrForOfStatement(node: ForInOrOfStatement): void {
             const preLoopLabel = createLoopLabel();
             const postLoopLabel = createBranchLabel();
             addAntecedent(preLoopLabel, currentFlow);
             currentFlow = preLoopLabel;
+            if (node.kind === SyntaxKind.ForOfStatement) {
+                bind(node.awaitModifier);
+            }
             bind(node.expression);
             addAntecedent(postLoopLabel, currentFlow);
             bind(node.initializer);
@@ -927,7 +1017,7 @@ namespace ts {
             return undefined;
         }
 
-        function bindbreakOrContinueFlow(node: BreakOrContinueStatement, breakTarget: FlowLabel, continueTarget: FlowLabel) {
+        function bindBreakOrContinueFlow(node: BreakOrContinueStatement, breakTarget: FlowLabel, continueTarget: FlowLabel) {
             const flowLabel = node.kind === SyntaxKind.BreakStatement ? breakTarget : continueTarget;
             if (flowLabel) {
                 addAntecedent(flowLabel, currentFlow);
@@ -941,30 +1031,87 @@ namespace ts {
                 const activeLabel = findActiveLabel(node.label.text);
                 if (activeLabel) {
                     activeLabel.referenced = true;
-                    bindbreakOrContinueFlow(node, activeLabel.breakTarget, activeLabel.continueTarget);
+                    bindBreakOrContinueFlow(node, activeLabel.breakTarget, activeLabel.continueTarget);
                 }
             }
             else {
-                bindbreakOrContinueFlow(node, currentBreakTarget, currentContinueTarget);
+                bindBreakOrContinueFlow(node, currentBreakTarget, currentContinueTarget);
             }
         }
 
         function bindTryStatement(node: TryStatement): void {
-            const postFinallyLabel = createBranchLabel();
+            const preFinallyLabel = createBranchLabel();
             const preTryFlow = currentFlow;
             // TODO: Every statement in try block is potentially an exit point!
             bind(node.tryBlock);
-            addAntecedent(postFinallyLabel, currentFlow);
+            addAntecedent(preFinallyLabel, currentFlow);
+
+            const flowAfterTry = currentFlow;
+            let flowAfterCatch = unreachableFlow;
+
             if (node.catchClause) {
                 currentFlow = preTryFlow;
                 bind(node.catchClause);
-                addAntecedent(postFinallyLabel, currentFlow);
+                addAntecedent(preFinallyLabel, currentFlow);
+
+                flowAfterCatch = currentFlow;
             }
             if (node.finallyBlock) {
-                currentFlow = preTryFlow;
+                // in finally flow is combined from pre-try/flow from try/flow from catch
+                // pre-flow is necessary to make sure that finally is reachable even if finally flows in both try and finally blocks are unreachable
+
+                // also for finally blocks we inject two extra edges into the flow graph.
+                // first -> edge that connects pre-try flow with the label at the beginning of the finally block, it has lock associated with it
+                // second -> edge that represents post-finally flow.
+                // these edges are used in following scenario:
+                // let a; (1)
+                // try { a = someOperation(); (2)}
+                // finally { (3) console.log(a) } (4)
+                // (5) a
+
+                // flow graph for this case looks roughly like this (arrows show ):
+                // (1-pre-try-flow) <--.. <-- (2-post-try-flow)
+                //  ^                                ^
+                //  |*****(3-pre-finally-label) -----|
+                //                ^
+                //                |-- ... <-- (4-post-finally-label) <--- (5)
+                // In case when we walk the flow starting from inside the finally block we want to take edge '*****' into account
+                // since it ensures that finally is always reachable. However when we start outside the finally block and go through label (5)
+                // then edge '*****' should be discarded because label 4 is only reachable if post-finally label-4 is reachable
+                // Simply speaking code inside finally block is treated as reachable as pre-try-flow
+                // since we conservatively assume that any line in try block can throw or return in which case we'll enter finally.
+                // However code after finally is reachable only if control flow was not abrupted in try/catch or finally blocks - it should be composed from
+                // final flows of these blocks without taking pre-try flow into account.
+                //
+                // extra edges that we inject allows to control this behavior
+                // if when walking the flow we step on post-finally edge - we can mark matching pre-finally edge as locked so it will be skipped.
+                const preFinallyFlow: PreFinallyFlow = { flags: FlowFlags.PreFinally, antecedent: preTryFlow, lock: {} };
+                addAntecedent(preFinallyLabel, preFinallyFlow);
+
+                currentFlow = finishFlowLabel(preFinallyLabel);
                 bind(node.finallyBlock);
+                // if flow after finally is unreachable - keep it
+                // otherwise check if flows after try and after catch are unreachable
+                // if yes - convert current flow to unreachable
+                // i.e.
+                // try { return "1" } finally { console.log(1); }
+                // console.log(2); // this line should be unreachable even if flow falls out of finally block
+                if (!(currentFlow.flags & FlowFlags.Unreachable)) {
+                    if ((flowAfterTry.flags & FlowFlags.Unreachable) && (flowAfterCatch.flags & FlowFlags.Unreachable)) {
+                        currentFlow = flowAfterTry === reportedUnreachableFlow || flowAfterCatch === reportedUnreachableFlow
+                            ? reportedUnreachableFlow
+                            : unreachableFlow;
+                    }
+                }
+                if (!(currentFlow.flags & FlowFlags.Unreachable)) {
+                    const afterFinallyFlow: AfterFinallyFlow = { flags: FlowFlags.AfterFinally, antecedent: currentFlow };
+                    preFinallyFlow.lock = afterFinallyFlow;
+                    currentFlow = afterFinallyFlow;
+                }
+            }
+            else {
+                currentFlow = finishFlowLabel(preFinallyLabel);
             }
-            currentFlow = finishFlowLabel(postFinallyLabel);
         }
 
         function bindSwitchStatement(node: SwitchStatement): void {
@@ -989,6 +1136,8 @@ namespace ts {
         }
 
         function bindCaseBlock(node: CaseBlock): void {
+            const savedSubtreeTransformFlags = subtreeTransformFlags;
+            subtreeTransformFlags = 0;
             const clauses = node.clauses;
             let fallthroughFlow = unreachableFlow;
             for (let i = 0; i < clauses.length; i++) {
@@ -1008,6 +1157,8 @@ namespace ts {
                     errorOnFirstToken(clause, Diagnostics.Fallthrough_case_in_switch);
                 }
             }
+            clauses.transformFlags = subtreeTransformFlags | TransformFlags.HasComputedFlags;
+            subtreeTransformFlags |= savedSubtreeTransformFlags;
         }
 
         function bindCaseClause(node: CaseClause): void {
@@ -1015,7 +1166,7 @@ namespace ts {
             currentFlow = preSwitchCaseFlow;
             bind(node.expression);
             currentFlow = saveCurrentFlow;
-            forEach(node.statements, bind);
+            bindEach(node.statements);
         }
 
         function pushActiveLabel(name: string, breakTarget: FlowLabel, continueTarget: FlowLabel): ActiveLabel {
@@ -1044,8 +1195,11 @@ namespace ts {
             if (!activeLabel.referenced && !options.allowUnusedLabels) {
                 file.bindDiagnostics.push(createDiagnosticForNode(node.label, Diagnostics.Unused_label));
             }
-            addAntecedent(postStatementLabel, currentFlow);
-            currentFlow = finishFlowLabel(postStatementLabel);
+            if (!node.statement || node.statement.kind !== SyntaxKind.DoStatement) {
+                // do statement sets current flow inside bindDoStatement
+                addAntecedent(postStatementLabel, currentFlow);
+                currentFlow = finishFlowLabel(postStatementLabel);
+            }
         }
 
         function bindDestructuringTargetFlow(node: Expression) {
@@ -1063,8 +1217,8 @@ namespace ts {
             }
             else if (node.kind === SyntaxKind.ArrayLiteralExpression) {
                 for (const e of (<ArrayLiteralExpression>node).elements) {
-                    if (e.kind === SyntaxKind.SpreadElementExpression) {
-                        bindAssignmentTargetFlow((<SpreadElementExpression>e).expression);
+                    if (e.kind === SyntaxKind.SpreadElement) {
+                        bindAssignmentTargetFlow((<SpreadElement>e).expression);
                     }
                     else {
                         bindDestructuringTargetFlow(e);
@@ -1079,6 +1233,9 @@ namespace ts {
                     else if (p.kind === SyntaxKind.ShorthandPropertyAssignment) {
                         bindAssignmentTargetFlow((<ShorthandPropertyAssignment>p).name);
                     }
+                    else if (p.kind === SyntaxKind.SpreadAssignment) {
+                        bindAssignmentTargetFlow((<SpreadAssignment>p).expression);
+                    }
                 }
             }
         }
@@ -1101,20 +1258,20 @@ namespace ts {
                 const saveTrueTarget = currentTrueTarget;
                 currentTrueTarget = currentFalseTarget;
                 currentFalseTarget = saveTrueTarget;
-                forEachChild(node, bind);
+                bindEachChild(node);
                 currentFalseTarget = currentTrueTarget;
                 currentTrueTarget = saveTrueTarget;
             }
             else {
-                forEachChild(node, bind);
-                if (node.operator === SyntaxKind.PlusEqualsToken || node.operator === SyntaxKind.MinusMinusToken) {
+                bindEachChild(node);
+                if (node.operator === SyntaxKind.PlusPlusToken || node.operator === SyntaxKind.MinusMinusToken) {
                     bindAssignmentTargetFlow(node.operand);
                 }
             }
         }
 
         function bindPostfixUnaryExpressionFlow(node: PostfixUnaryExpression) {
-            forEachChild(node, bind);
+            bindEachChild(node);
             if (node.operator === SyntaxKind.PlusPlusToken || node.operator === SyntaxKind.MinusMinusToken) {
                 bindAssignmentTargetFlow(node.operand);
             }
@@ -1133,15 +1290,21 @@ namespace ts {
                 }
             }
             else {
-                forEachChild(node, bind);
-                if (operator === SyntaxKind.EqualsToken && !isAssignmentTarget(node)) {
+                bindEachChild(node);
+                if (isAssignmentOperator(operator) && !isAssignmentTarget(node)) {
                     bindAssignmentTargetFlow(node.left);
+                    if (operator === SyntaxKind.EqualsToken && node.left.kind === SyntaxKind.ElementAccessExpression) {
+                        const elementAccess = <ElementAccessExpression>node.left;
+                        if (isNarrowableOperand(elementAccess.expression)) {
+                            currentFlow = createFlowArrayMutation(currentFlow, node);
+                        }
+                    }
                 }
             }
         }
 
         function bindDeleteExpressionFlow(node: DeleteExpression) {
-            forEachChild(node, bind);
+            bindEachChild(node);
             if (node.expression.kind === SyntaxKind.PropertyAccessExpression) {
                 bindAssignmentTargetFlow(node.expression);
             }
@@ -1153,9 +1316,11 @@ namespace ts {
             const postExpressionLabel = createBranchLabel();
             bindCondition(node.condition, trueLabel, falseLabel);
             currentFlow = finishFlowLabel(trueLabel);
+            bind(node.questionToken);
             bind(node.whenTrue);
             addAntecedent(postExpressionLabel, currentFlow);
             currentFlow = finishFlowLabel(falseLabel);
+            bind(node.colonToken);
             bind(node.whenFalse);
             addAntecedent(postExpressionLabel, currentFlow);
             currentFlow = finishFlowLabel(postExpressionLabel);
@@ -1164,7 +1329,7 @@ namespace ts {
         function bindInitializedVariableFlow(node: VariableDeclaration | ArrayBindingElement) {
             const name = !isOmittedExpression(node) ? node.name : undefined;
             if (isBindingPattern(name)) {
-                for (const child of name.elements) {
+                for (const child of <ArrayBindingElement[]>name.elements) {
                     bindInitializedVariableFlow(child);
                 }
             }
@@ -1174,12 +1339,32 @@ namespace ts {
         }
 
         function bindVariableDeclarationFlow(node: VariableDeclaration) {
-            forEachChild(node, bind);
-            if (node.initializer || node.parent.parent.kind === SyntaxKind.ForInStatement || node.parent.parent.kind === SyntaxKind.ForOfStatement) {
+            bindEachChild(node);
+            if (node.initializer || isForInOrOfStatement(node.parent.parent)) {
                 bindInitializedVariableFlow(node);
             }
         }
 
+        function bindJSDocComment(node: JSDoc) {
+            forEachChild(node, n => {
+                if (n.kind !== SyntaxKind.JSDocTypedefTag) {
+                    bind(n);
+                }
+            });
+        }
+
+        function bindJSDocTypedefTag(node: JSDocTypedefTag) {
+            forEachChild(node, n => {
+                // if the node has a fullName "A.B.C", that means symbol "C" was already bound
+                // when we visit "fullName"; so when we visit the name "C" as the next child of
+                // the jsDocTypedefTag, we should skip binding it.
+                if (node.fullName && n === node.name && node.fullName.kind !== SyntaxKind.Identifier) {
+                    return;
+                }
+                bind(n);
+            });
+        }
+
         function bindCallExpressionFlow(node: CallExpression) {
             // If the target of the call expression is a function expression or arrow function we have
             // an immediately invoked function expression (IIFE). Initialize the flowNode property to
@@ -1189,12 +1374,18 @@ namespace ts {
                 expr = (<ParenthesizedExpression>expr).expression;
             }
             if (expr.kind === SyntaxKind.FunctionExpression || expr.kind === SyntaxKind.ArrowFunction) {
-                forEach(node.typeArguments, bind);
-                forEach(node.arguments, bind);
+                bindEach(node.typeArguments);
+                bindEach(node.arguments);
                 bind(node.expression);
             }
             else {
-                forEachChild(node, bind);
+                bindEachChild(node);
+            }
+            if (node.expression.kind === SyntaxKind.PropertyAccessExpression) {
+                const propertyAccess = <PropertyAccessExpression>node.expression;
+                if (isNarrowableOperand(propertyAccess.expression) && isPushOrUnshiftIdentifier(propertyAccess.name)) {
+                    currentFlow = createFlowArrayMutation(currentFlow, node);
+                }
             }
         }
 
@@ -1207,6 +1398,7 @@ namespace ts {
                 case SyntaxKind.TypeLiteral:
                 case SyntaxKind.JSDocTypeLiteral:
                 case SyntaxKind.JSDocRecordType:
+                case SyntaxKind.JsxAttributes:
                     return ContainerFlags.IsContainer;
 
                 case SyntaxKind.InterfaceDeclaration:
@@ -1215,14 +1407,19 @@ namespace ts {
                 case SyntaxKind.JSDocFunctionType:
                 case SyntaxKind.ModuleDeclaration:
                 case SyntaxKind.TypeAliasDeclaration:
+                case SyntaxKind.MappedType:
                     return ContainerFlags.IsContainer | ContainerFlags.HasLocals;
 
                 case SyntaxKind.SourceFile:
                     return ContainerFlags.IsContainer | ContainerFlags.IsControlFlowContainer | ContainerFlags.HasLocals;
 
+                case SyntaxKind.MethodDeclaration:
+                    if (isObjectLiteralOrClassExpressionMethod(node)) {
+                        return ContainerFlags.IsContainer | ContainerFlags.IsControlFlowContainer | ContainerFlags.HasLocals | ContainerFlags.IsFunctionLike | ContainerFlags.IsObjectLiteralOrClassExpressionMethod;
+                    }
+                // falls through
                 case SyntaxKind.Constructor:
                 case SyntaxKind.FunctionDeclaration:
-                case SyntaxKind.MethodDeclaration:
                 case SyntaxKind.MethodSignature:
                 case SyntaxKind.GetAccessor:
                 case SyntaxKind.SetAccessor:
@@ -1309,6 +1506,7 @@ namespace ts {
                 case SyntaxKind.InterfaceDeclaration:
                 case SyntaxKind.JSDocRecordType:
                 case SyntaxKind.JSDocTypeLiteral:
+                case SyntaxKind.JsxAttributes:
                     // Interface/Object-types always have their children added to the 'members' of
                     // their container. They are only accessible through an instance of their
                     // container, and are never in scope otherwise (even inside the body of the
@@ -1331,10 +1529,11 @@ namespace ts {
                 case SyntaxKind.ArrowFunction:
                 case SyntaxKind.JSDocFunctionType:
                 case SyntaxKind.TypeAliasDeclaration:
+                case SyntaxKind.MappedType:
                     // All the children of these container types are never visible through another
                     // symbol (i.e. through another symbol's 'exports' or 'members').  Instead,
                     // they're only accessed 'lexically' (i.e. from code that exists underneath
-                    // their container in the tree.  To accomplish this, we simply add their declared
+                    // their container in the tree). To accomplish this, we simply add their declared
                     // symbol to the 'locals' of the container.  These symbols can then be found as
                     // the type checker walks up the containers, checking them for matching names.
                     return declareSymbol(container.locals, /*parent*/ undefined, node, symbolFlags, symbolExcludes);
@@ -1350,13 +1549,13 @@ namespace ts {
         function declareSourceFileMember(node: Declaration, symbolFlags: SymbolFlags, symbolExcludes: SymbolFlags) {
             return isExternalModule(file)
                 ? declareModuleMember(node, symbolFlags, symbolExcludes)
-                : declareSymbol(file.locals, undefined, node, symbolFlags, symbolExcludes);
+                : declareSymbol(file.locals, /*parent*/ undefined, node, symbolFlags, symbolExcludes);
         }
 
         function hasExportDeclarations(node: ModuleDeclaration | SourceFile): boolean {
             const body = node.kind === SyntaxKind.SourceFile ? node : (<ModuleDeclaration>node).body;
             if (body && (body.kind === SyntaxKind.SourceFile || body.kind === SyntaxKind.ModuleBlock)) {
-                for (const stat of (<Block>body).statements) {
+                for (const stat of (<BlockLike>body).statements) {
                     if (stat.kind === SyntaxKind.ExportDeclaration || stat.kind === SyntaxKind.ExportAssignment) {
                         return true;
                     }
@@ -1383,7 +1582,7 @@ namespace ts {
                     errorOnFirstToken(node, Diagnostics.export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always_visible);
                 }
                 if (isExternalModuleAugmentation(node)) {
-                    declareSymbolAndAddToSymbolTable(node, SymbolFlags.NamespaceModule, SymbolFlags.NamespaceModuleExcludes);
+                    declareModuleSymbol(node);
                 }
                 else {
                     let pattern: Pattern | undefined;
@@ -1405,12 +1604,8 @@ namespace ts {
                 }
             }
             else {
-                const state = getModuleInstanceState(node);
-                if (state === ModuleInstanceState.NonInstantiated) {
-                    declareSymbolAndAddToSymbolTable(node, SymbolFlags.NamespaceModule, SymbolFlags.NamespaceModuleExcludes);
-                }
-                else {
-                    declareSymbolAndAddToSymbolTable(node, SymbolFlags.ValueModule, SymbolFlags.ValueModuleExcludes);
+                const state = declareModuleSymbol(node);
+                if (state !== ModuleInstanceState.NonInstantiated) {
                     if (node.symbol.flags & (SymbolFlags.Function | SymbolFlags.Class | SymbolFlags.RegularEnum)) {
                         // if module was already merged with some function, class or non-const enum
                         // treat is a non-const-enum-only
@@ -1431,6 +1626,15 @@ namespace ts {
             }
         }
 
+        function declareModuleSymbol(node: ModuleDeclaration): ModuleInstanceState {
+            const state = getModuleInstanceState(node);
+            const instantiated = state !== ModuleInstanceState.NonInstantiated;
+            declareSymbolAndAddToSymbolTable(node,
+                instantiated ? SymbolFlags.ValueModule : SymbolFlags.NamespaceModule,
+                instantiated ? SymbolFlags.ValueModuleExcludes : SymbolFlags.NamespaceModuleExcludes);
+            return state;
+        }
+
         function bindFunctionOrConstructorType(node: SignatureDeclaration): void {
             // For a given function symbol "<...>(...) => T" we want to generate a symbol identical
             // to the one we would get for: { <...>(...): T }
@@ -1444,7 +1648,7 @@ namespace ts {
             const typeLiteralSymbol = createSymbol(SymbolFlags.TypeLiteral, "__type");
             addDeclarationToSymbol(typeLiteralSymbol, node, SymbolFlags.TypeLiteral);
             typeLiteralSymbol.members = createMap<Symbol>();
-            typeLiteralSymbol.members[symbol.name] = symbol;
+            typeLiteralSymbol.members.set(symbol.name, symbol);
         }
 
         function bindObjectLiteralExpression(node: ObjectLiteralExpression) {
@@ -1457,7 +1661,7 @@ namespace ts {
                 const seen = createMap<ElementKind>();
 
                 for (const prop of node.properties) {
-                    if (prop.name.kind !== SyntaxKind.Identifier) {
+                    if (prop.kind === SyntaxKind.SpreadAssignment || prop.name.kind !== SyntaxKind.Identifier) {
                         continue;
                     }
 
@@ -1475,9 +1679,9 @@ namespace ts {
                         ? ElementKind.Property
                         : ElementKind.Accessor;
 
-                    const existingKind = seen[identifier.text];
+                    const existingKind = seen.get(identifier.text);
                     if (!existingKind) {
-                        seen[identifier.text] = currentKind;
+                        seen.set(identifier.text, currentKind);
                         continue;
                     }
 
@@ -1492,6 +1696,14 @@ namespace ts {
             return bindAnonymousDeclaration(node, SymbolFlags.ObjectLiteral, "__object");
         }
 
+        function bindJsxAttributes(node: JsxAttributes) {
+            return bindAnonymousDeclaration(node, SymbolFlags.ObjectLiteral, "__jsxAttributes");
+        }
+
+        function bindJsxAttribute(node: JsxAttribute, symbolFlags: SymbolFlags, symbolExcludes: SymbolFlags) {
+            return declareSymbolAndAddToSymbolTable(node, symbolFlags, symbolExcludes);
+        }
+
         function bindAnonymousDeclaration(node: Declaration, symbolFlags: SymbolFlags, name: string) {
             const symbol = createSymbol(symbolFlags, name);
             addDeclarationToSymbol(symbol, node, symbolFlags);
@@ -1507,13 +1719,13 @@ namespace ts {
                         declareModuleMember(node, symbolFlags, symbolExcludes);
                         break;
                     }
-                // fall through.
+                // falls through
                 default:
                     if (!blockScopeContainer.locals) {
                         blockScopeContainer.locals = createMap<Symbol>();
                         addToContainerChain(blockScopeContainer);
                     }
-                    declareSymbol(blockScopeContainer.locals, undefined, node, symbolFlags, symbolExcludes);
+                    declareSymbol(blockScopeContainer.locals, /*parent*/ undefined, node, symbolFlags, symbolExcludes);
             }
         }
 
@@ -1632,7 +1844,7 @@ namespace ts {
         }
 
         function checkStrictModeFunctionDeclaration(node: FunctionDeclaration) {
-            if (languageVersion < ScriptTarget.ES6) {
+            if (languageVersion < ScriptTarget.ES2015) {
                 // Report error if function is not top level function declaration
                 if (blockScopeContainer.kind !== SyntaxKind.SourceFile &&
                     blockScopeContainer.kind !== SyntaxKind.ModuleDeclaration &&
@@ -1647,7 +1859,7 @@ namespace ts {
         }
 
         function checkStrictModeNumericLiteral(node: NumericLiteral) {
-            if (inStrictMode && node.isOctalLiteral) {
+            if (inStrictMode && node.numericLiteralFlags & NumericLiteralFlags.Octal) {
                 file.bindDiagnostics.push(createDiagnosticForNode(node, Diagnostics.Octal_literals_are_not_allowed_in_strict_mode));
             }
         }
@@ -1693,6 +1905,18 @@ namespace ts {
             }
             node.parent = parent;
             const saveInStrictMode = inStrictMode;
+
+            // Even though in the AST the jsdoc @typedef node belongs to the current node,
+            // its symbol might be in the same scope with the current node's symbol. Consider:
+            //
+            //     /** @typedef {string | number} MyType */
+            //     function foo();
+            //
+            // Here the current node is "foo", which is a container, but the scope of "MyType" should
+            // not be inside "foo". Therefore we always bind @typedef before bind the parent node,
+            // and skip binding this tag later when binding all the other jsdoc tags.
+            if (isInJavaScriptFile(node)) bindJSDocTypedefTagIfAny(node);
+
             // First we bind declaration nodes to a symbol if possible. We'll both create a symbol
             // and then potentially add the symbol to an appropriate symbol table. Possible
             // destination symbol tables are:
@@ -1727,6 +1951,27 @@ namespace ts {
             inStrictMode = saveInStrictMode;
         }
 
+        function bindJSDocTypedefTagIfAny(node: Node) {
+            if (!node.jsDoc) {
+                return;
+            }
+
+            for (const jsDoc of node.jsDoc) {
+                if (!jsDoc.tags) {
+                    continue;
+                }
+
+                for (const tag of jsDoc.tags) {
+                    if (tag.kind === SyntaxKind.JSDocTypedefTag) {
+                        const savedParent = parent;
+                        parent = jsDoc;
+                        bind(tag);
+                        parent = savedParent;
+                    }
+                }
+            }
+        }
+
         function updateStrictModeStatementList(statements: NodeArray<Statement>) {
             if (!inStrictMode) {
                 for (const statement of statements) {
@@ -1755,6 +2000,18 @@ namespace ts {
             switch (node.kind) {
                 /* Strict mode checks */
                 case SyntaxKind.Identifier:
+                    // for typedef type names with namespaces, bind the new jsdoc type symbol here
+                    // because it requires all containing namespaces to be in effect, namely the
+                    // current "blockScopeContainer" needs to be set to its immediate namespace parent.
+                    if ((<Identifier>node).isInJSDocNamespace) {
+                        let parentNode = node.parent;
+                        while (parentNode && parentNode.kind !== SyntaxKind.JSDocTypedefTag) {
+                            parentNode = parentNode.parent;
+                        }
+                        bindBlockScopedDeclaration(<Declaration>parentNode, SymbolFlags.TypeAlias, SymbolFlags.TypeAliasExcludes);
+                        break;
+                    }
+                // falls through
                 case SyntaxKind.ThisKeyword:
                     if (currentFlow && (isExpression(node) || parent.kind === SyntaxKind.ShorthandPropertyAssignment)) {
                         node.flowNode = currentFlow;
@@ -1766,27 +2023,28 @@ namespace ts {
                     }
                     break;
                 case SyntaxKind.BinaryExpression:
-                    if (isInJavaScriptFile(node)) {
-                        const specialKind = getSpecialPropertyAssignmentKind(node);
-                        switch (specialKind) {
-                            case SpecialPropertyAssignmentKind.ExportsProperty:
-                                bindExportsPropertyAssignment(<BinaryExpression>node);
-                                break;
-                            case SpecialPropertyAssignmentKind.ModuleExports:
-                                bindModuleExportsAssignment(<BinaryExpression>node);
-                                break;
-                            case SpecialPropertyAssignmentKind.PrototypeProperty:
-                                bindPrototypePropertyAssignment(<BinaryExpression>node);
-                                break;
-                            case SpecialPropertyAssignmentKind.ThisProperty:
-                                bindThisPropertyAssignment(<BinaryExpression>node);
-                                break;
-                            case SpecialPropertyAssignmentKind.None:
-                                // Nothing to do
-                                break;
-                            default:
-                                Debug.fail("Unknown special property assignment kind");
-                        }
+                    const specialKind = getSpecialPropertyAssignmentKind(node as BinaryExpression);
+                    switch (specialKind) {
+                        case SpecialPropertyAssignmentKind.ExportsProperty:
+                            bindExportsPropertyAssignment(<BinaryExpression>node);
+                            break;
+                        case SpecialPropertyAssignmentKind.ModuleExports:
+                            bindModuleExportsAssignment(<BinaryExpression>node);
+                            break;
+                        case SpecialPropertyAssignmentKind.PrototypeProperty:
+                            bindPrototypePropertyAssignment(<BinaryExpression>node);
+                            break;
+                        case SpecialPropertyAssignmentKind.ThisProperty:
+                            bindThisPropertyAssignment(<BinaryExpression>node);
+                            break;
+                        case SpecialPropertyAssignmentKind.Property:
+                            bindStaticPropertyAssignment(<BinaryExpression>node);
+                            break;
+                        case SpecialPropertyAssignmentKind.None:
+                            // Nothing to do
+                            break;
+                        default:
+                            Debug.fail("Unknown special property assignment kind");
                     }
                     return checkStrictModeBinaryExpression(<BinaryExpression>node);
                 case SyntaxKind.CatchClause:
@@ -1815,18 +2073,27 @@ namespace ts {
                     return bindVariableDeclarationOrBindingElement(<VariableDeclaration | BindingElement>node);
                 case SyntaxKind.PropertyDeclaration:
                 case SyntaxKind.PropertySignature:
-                case SyntaxKind.JSDocRecordMember:
-                    return bindPropertyOrMethodOrAccessor(<Declaration>node, SymbolFlags.Property | ((<PropertyDeclaration>node).questionToken ? SymbolFlags.Optional : SymbolFlags.None), SymbolFlags.PropertyExcludes);
-                case SyntaxKind.JSDocPropertyTag:
-                    return bindJSDocProperty(<JSDocPropertyTag>node);
+                    return bindPropertyWorker(node as PropertyDeclaration | PropertySignature);
                 case SyntaxKind.PropertyAssignment:
                 case SyntaxKind.ShorthandPropertyAssignment:
                     return bindPropertyOrMethodOrAccessor(<Declaration>node, SymbolFlags.Property, SymbolFlags.PropertyExcludes);
                 case SyntaxKind.EnumMember:
                     return bindPropertyOrMethodOrAccessor(<Declaration>node, SymbolFlags.EnumMember, SymbolFlags.EnumMemberExcludes);
 
+                case SyntaxKind.SpreadAssignment:
                 case SyntaxKind.JsxSpreadAttribute:
-                    emitFlags |= NodeFlags.HasJsxSpreadAttributes;
+                    let root = container;
+                    let hasRest = false;
+                    while (root.parent) {
+                        if (root.kind === SyntaxKind.ObjectLiteralExpression &&
+                            root.parent.kind === SyntaxKind.BinaryExpression &&
+                            (root.parent as BinaryExpression).operatorToken.kind === SyntaxKind.EqualsToken &&
+                            (root.parent as BinaryExpression).left === root) {
+                            hasRest = true;
+                            break;
+                        }
+                        root = root.parent;
+                    }
                     return;
 
                 case SyntaxKind.CallSignature:
@@ -1851,12 +2118,10 @@ namespace ts {
                     return bindPropertyOrMethodOrAccessor(<Declaration>node, SymbolFlags.SetAccessor, SymbolFlags.SetAccessorExcludes);
                 case SyntaxKind.FunctionType:
                 case SyntaxKind.ConstructorType:
-                case SyntaxKind.JSDocFunctionType:
                     return bindFunctionOrConstructorType(<SignatureDeclaration>node);
                 case SyntaxKind.TypeLiteral:
-                case SyntaxKind.JSDocTypeLiteral:
-                case SyntaxKind.JSDocRecordType:
-                    return bindAnonymousDeclaration(<TypeLiteralNode>node, SymbolFlags.TypeLiteral, "__type");
+                case SyntaxKind.MappedType:
+                    return bindAnonymousTypeWorker(node as TypeLiteralNode | MappedTypeNode);
                 case SyntaxKind.ObjectLiteralExpression:
                     return bindObjectLiteralExpression(<ObjectLiteralExpression>node);
                 case SyntaxKind.FunctionExpression:
@@ -1877,13 +2142,17 @@ namespace ts {
                     return bindClassLikeDeclaration(<ClassLikeDeclaration>node);
                 case SyntaxKind.InterfaceDeclaration:
                     return bindBlockScopedDeclaration(<Declaration>node, SymbolFlags.Interface, SymbolFlags.InterfaceExcludes);
-                case SyntaxKind.JSDocTypedefTag:
                 case SyntaxKind.TypeAliasDeclaration:
                     return bindBlockScopedDeclaration(<Declaration>node, SymbolFlags.TypeAlias, SymbolFlags.TypeAliasExcludes);
                 case SyntaxKind.EnumDeclaration:
                     return bindEnumDeclaration(<EnumDeclaration>node);
                 case SyntaxKind.ModuleDeclaration:
                     return bindModuleDeclaration(<ModuleDeclaration>node);
+                // Jsx-attributes
+                case SyntaxKind.JsxAttributes:
+                    return bindJsxAttributes(<JsxAttributes>node);
+                case SyntaxKind.JsxAttribute:
+                    return bindJsxAttribute(<JsxAttribute>node, SymbolFlags.Property, SymbolFlags.PropertyExcludes);
 
                 // Imports and exports
                 case SyntaxKind.ImportEqualsDeclaration:
@@ -1906,12 +2175,40 @@ namespace ts {
                     if (!isFunctionLike(node.parent)) {
                         return;
                     }
-                    // Fall through
+                // falls through
                 case SyntaxKind.ModuleBlock:
                     return updateStrictModeStatementList((<Block | ModuleBlock>node).statements);
+
+                case SyntaxKind.JSDocRecordMember:
+                    return bindPropertyWorker(node as JSDocRecordMember);
+                case SyntaxKind.JSDocPropertyTag:
+                    return declareSymbolAndAddToSymbolTable(node as JSDocPropertyTag,
+                        (node as JSDocPropertyTag).isBracketed || ((node as JSDocPropertyTag).typeExpression && (node as JSDocPropertyTag).typeExpression.type.kind === SyntaxKind.JSDocOptionalType) ?
+                            SymbolFlags.Property | SymbolFlags.Optional : SymbolFlags.Property,
+                        SymbolFlags.PropertyExcludes);
+                case SyntaxKind.JSDocFunctionType:
+                    return bindFunctionOrConstructorType(<SignatureDeclaration>node);
+                case SyntaxKind.JSDocTypeLiteral:
+                case SyntaxKind.JSDocRecordType:
+                    return bindAnonymousTypeWorker(node as JSDocTypeLiteral | JSDocRecordType);
+                case SyntaxKind.JSDocTypedefTag: {
+                    const { fullName } = node as JSDocTypedefTag;
+                    if (!fullName || fullName.kind === SyntaxKind.Identifier) {
+                        return bindBlockScopedDeclaration(<Declaration>node, SymbolFlags.TypeAlias, SymbolFlags.TypeAliasExcludes);
+                    }
+                    break;
+                }
             }
         }
 
+        function bindPropertyWorker(node: PropertyDeclaration | PropertySignature) {
+            return bindPropertyOrMethodOrAccessor(node, SymbolFlags.Property | (node.questionToken ? SymbolFlags.Optional : SymbolFlags.None), SymbolFlags.PropertyExcludes);
+        }
+
+        function bindAnonymousTypeWorker(node: TypeLiteralNode | MappedTypeNode | JSDocTypeLiteral | JSDocRecordType) {
+            return bindAnonymousDeclaration(<Declaration>node, SymbolFlags.TypeLiteral, "__type");
+        }
+
         function checkTypePredicate(node: TypePredicateNode) {
             const { parameterName, type } = node;
             if (parameterName && parameterName.kind === SyntaxKind.Identifier) {
@@ -1931,7 +2228,7 @@ namespace ts {
         }
 
         function bindSourceFileAsExternalModule() {
-            bindAnonymousDeclaration(file, SymbolFlags.ValueModule, `"${removeFileExtension(file.fileName) }"`);
+            bindAnonymousDeclaration(file, SymbolFlags.ValueModule, `"${removeFileExtension(file.fileName)}"`);
         }
 
         function bindExportAssignment(node: ExportAssignment | BinaryExpression) {
@@ -1940,12 +2237,15 @@ namespace ts {
                 bindAnonymousDeclaration(node, SymbolFlags.Alias, getDeclarationName(node));
             }
             else {
+                // An export default clause with an expression exports a value
+                // We want to exclude both class and function here,  this is necessary to issue an error when there are both
+                // default export-assignment and default export function and class declaration.
                 const flags = node.kind === SyntaxKind.ExportAssignment && exportAssignmentIsAlias(<ExportAssignment>node)
                     // An export default clause with an EntityNameExpression exports all meanings of that identifier
                     ? SymbolFlags.Alias
                     // An export default clause with any other expression exports a value
                     : SymbolFlags.Property;
-                declareSymbol(container.symbol.exports, container.symbol, node, flags, SymbolFlags.PropertyExcludes | SymbolFlags.AliasExcludes);
+                declareSymbol(container.symbol.exports, container.symbol, node, flags, SymbolFlags.Property | SymbolFlags.AliasExcludes | SymbolFlags.Class | SymbolFlags.Function);
             }
         }
 
@@ -1996,7 +2296,9 @@ namespace ts {
         function setCommonJsModuleIndicator(node: Node) {
             if (!file.commonJsModuleIndicator) {
                 file.commonJsModuleIndicator = node;
-                bindSourceFileAsExternalModule();
+                if (!file.externalModuleIndicator) {
+                    bindSourceFileAsExternalModule();
+                }
             }
         }
 
@@ -2007,7 +2309,42 @@ namespace ts {
             declareSymbol(file.symbol.exports, file.symbol, <PropertyAccessExpression>node.left, SymbolFlags.Property | SymbolFlags.Export, SymbolFlags.None);
         }
 
+        function isExportsOrModuleExportsOrAlias(node: Node): boolean {
+            return isExportsIdentifier(node) ||
+                isModuleExportsPropertyAccessExpression(node) ||
+                isNameOfExportsOrModuleExportsAliasDeclaration(node);
+        }
+
+        function isNameOfExportsOrModuleExportsAliasDeclaration(node: Node) {
+            if (node.kind === SyntaxKind.Identifier) {
+                const symbol = lookupSymbolForName((<Identifier>node).text);
+                if (symbol && symbol.valueDeclaration && symbol.valueDeclaration.kind === SyntaxKind.VariableDeclaration) {
+                    const declaration = symbol.valueDeclaration as VariableDeclaration;
+                    if (declaration.initializer) {
+                        return isExportsOrModuleExportsOrAliasOrAssignemnt(declaration.initializer);
+                    }
+                }
+            }
+            return false;
+        }
+
+        function isExportsOrModuleExportsOrAliasOrAssignemnt(node: Node): boolean {
+            return isExportsOrModuleExportsOrAlias(node) ||
+                (isAssignmentExpression(node, /*excludeCompoundAssignements*/ true) && (isExportsOrModuleExportsOrAliasOrAssignemnt(node.left) || isExportsOrModuleExportsOrAliasOrAssignemnt(node.right)));
+        }
+
         function bindModuleExportsAssignment(node: BinaryExpression) {
+            // A common practice in node modules is to set 'export = module.exports = {}', this ensures that 'exports'
+            // is still pointing to 'module.exports'.
+            // We do not want to consider this as 'export=' since a module can have only one of these.
+            // Similarly we do not want to treat 'module.exports = exports' as an 'export='.
+            const assignedExpression = getRightMostAssignedExpression(node.right);
+            if (isEmptyObjectLiteral(assignedExpression) || isExportsOrModuleExportsOrAlias(assignedExpression)) {
+                // Mark it as a module in case there are no other exports in the file
+                setCommonJsModuleIndicator(node);
+                return;
+            }
+
             // 'module.exports = expr' assignment
             setCommonJsModuleIndicator(node);
             declareSymbol(file.symbol.exports, file.symbol, node, SymbolFlags.Property | SymbolFlags.Export | SymbolFlags.ValueModule, SymbolFlags.None);
@@ -2015,23 +2352,30 @@ namespace ts {
 
         function bindThisPropertyAssignment(node: BinaryExpression) {
             Debug.assert(isInJavaScriptFile(node));
-            // Declare a 'member' if the container is an ES5 class or ES6 constructor
-            if (container.kind === SyntaxKind.FunctionDeclaration || container.kind === SyntaxKind.FunctionExpression) {
-                container.symbol.members = container.symbol.members || createMap<Symbol>();
-                // It's acceptable for multiple 'this' assignments of the same identifier to occur
-                declareSymbol(container.symbol.members, container.symbol, node, SymbolFlags.Property, SymbolFlags.PropertyExcludes & ~SymbolFlags.Property);
-            }
-            else if (container.kind === SyntaxKind.Constructor) {
-                // this.foo assignment in a JavaScript class
-                // Bind this property to the containing class
-                const saveContainer = container;
-                container = container.parent;
-                const symbol = bindPropertyOrMethodOrAccessor(node, SymbolFlags.Property, SymbolFlags.None);
-                if (symbol) {
-                    // constructor-declared symbols can be overwritten by subsequent method declarations
-                    (symbol as Symbol).isReplaceableByMethod = true;
-                }
-                container = saveContainer;
+            const container = getThisContainer(node, /*includeArrowFunctions*/ false);
+            switch (container.kind) {
+                case SyntaxKind.FunctionDeclaration:
+                case SyntaxKind.FunctionExpression:
+                    // Declare a 'member' if the container is an ES5 class or ES6 constructor
+                    container.symbol.members = container.symbol.members || createMap<Symbol>();
+                    // It's acceptable for multiple 'this' assignments of the same identifier to occur
+                    declareSymbol(container.symbol.members, container.symbol, node, SymbolFlags.Property, SymbolFlags.PropertyExcludes & ~SymbolFlags.Property);
+                    break;
+
+                case SyntaxKind.Constructor:
+                case SyntaxKind.PropertyDeclaration:
+                case SyntaxKind.MethodDeclaration:
+                case SyntaxKind.GetAccessor:
+                case SyntaxKind.SetAccessor:
+                    // this.foo assignment in a JavaScript class
+                    // Bind this property to the containing class
+                    const containingClass = container.parent;
+                    const symbol = declareSymbol(hasModifier(container, ModifierFlags.Static) ? containingClass.symbol.exports : containingClass.symbol.members, containingClass.symbol, node, SymbolFlags.Property, SymbolFlags.None);
+                    if (symbol) {
+                        // symbols declared through 'this' property assignements can be overwritten by subsequent method declarations
+                        (symbol as Symbol).isReplaceableByMethod = true;
+                    }
+                    break;
             }
         }
 
@@ -2049,38 +2393,65 @@ namespace ts {
             constructorFunction.parent = classPrototype;
             classPrototype.parent = leftSideOfAssignment;
 
-            const funcSymbol = container.locals[constructorFunction.text];
-            if (!funcSymbol || !(funcSymbol.flags & SymbolFlags.Function || isDeclarationOfFunctionExpression(funcSymbol))) {
+            bindPropertyAssignment(constructorFunction.text, leftSideOfAssignment, /*isPrototypeProperty*/ true);
+        }
+
+        function bindStaticPropertyAssignment(node: BinaryExpression) {
+            // We saw a node of the form 'x.y = z'. Declare a 'member' y on x if x was a function.
+
+            // Look up the function in the local scope, since prototype assignments should
+            // follow the function declaration
+            const leftSideOfAssignment = node.left as PropertyAccessExpression;
+            const target = leftSideOfAssignment.expression as Identifier;
+
+            // Fix up parent pointers since we're going to use these nodes before we bind into them
+            leftSideOfAssignment.parent = node;
+            target.parent = leftSideOfAssignment;
+
+            if (isNameOfExportsOrModuleExportsAliasDeclaration(target)) {
+                // This can be an alias for the 'exports' or 'module.exports' names, e.g.
+                //    var util = module.exports;
+                //    util.property = function ...
+                bindExportsPropertyAssignment(node);
+            }
+            else {
+                bindPropertyAssignment(target.text, leftSideOfAssignment, /*isPrototypeProperty*/ false);
+            }
+        }
+
+        function lookupSymbolForName(name: string) {
+            return (container.symbol && container.symbol.exports && container.symbol.exports.get(name)) || (container.locals && container.locals.get(name));
+        }
+
+        function bindPropertyAssignment(functionName: string, propertyAccessExpression: PropertyAccessExpression, isPrototypeProperty: boolean) {
+            let targetSymbol = lookupSymbolForName(functionName);
+
+            if (targetSymbol && isDeclarationOfFunctionOrClassExpression(targetSymbol)) {
+                targetSymbol = (targetSymbol.valueDeclaration as VariableDeclaration).initializer.symbol;
+            }
+
+            if (!targetSymbol || !(targetSymbol.flags & (SymbolFlags.Function | SymbolFlags.Class))) {
                 return;
             }
 
             // Set up the members collection if it doesn't exist already
-            if (!funcSymbol.members) {
-                funcSymbol.members = createMap<Symbol>();
-            }
+            const symbolTable = isPrototypeProperty ?
+                (targetSymbol.members || (targetSymbol.members = createMap<Symbol>())) :
+                (targetSymbol.exports || (targetSymbol.exports = createMap<Symbol>()));
 
             // Declare the method/property
-            declareSymbol(funcSymbol.members, funcSymbol, leftSideOfAssignment, SymbolFlags.Property, SymbolFlags.PropertyExcludes);
+            declareSymbol(symbolTable, targetSymbol, propertyAccessExpression, SymbolFlags.Property, SymbolFlags.PropertyExcludes);
         }
 
         function bindCallExpression(node: CallExpression) {
             // We're only inspecting call expressions to detect CommonJS modules, so we can skip
             // this check if we've already seen the module indicator
-            if (!file.commonJsModuleIndicator && isRequireCall(node, /*checkArgumentIsStringLiteral*/false)) {
+            if (!file.commonJsModuleIndicator && isRequireCall(node, /*checkArgumentIsStringLiteral*/ false)) {
                 setCommonJsModuleIndicator(node);
             }
         }
 
         function bindClassLikeDeclaration(node: ClassLikeDeclaration) {
-            if (!isDeclarationFile(file) && !isInAmbientContext(node)) {
-                if (getClassExtendsHeritageClauseElement(node) !== undefined) {
-                    emitFlags |= NodeFlags.HasClassExtends;
-                }
-                if (nodeIsDecorated(node)) {
-                    emitFlags |= NodeFlags.HasDecorators;
-                }
-            }
-
             if (node.kind === SyntaxKind.ClassDeclaration) {
                 bindBlockScopedDeclaration(node, SymbolFlags.Class, SymbolFlags.ClassExcludes);
             }
@@ -2089,7 +2460,7 @@ namespace ts {
                 bindAnonymousDeclaration(node, SymbolFlags.Class, bindingName);
                 // Add name of class expression into the map for semantic classifier
                 if (node.name) {
-                    classifiableNames[node.name.text] = node.name.text;
+                    classifiableNames.set(node.name.text, node.name.text);
                 }
             }
 
@@ -2105,14 +2476,14 @@ namespace ts {
             // module might have an exported variable called 'prototype'.  We can't allow that as
             // that would clash with the built-in 'prototype' for the class.
             const prototypeSymbol = createSymbol(SymbolFlags.Property | SymbolFlags.Prototype, "prototype");
-            if (symbol.exports[prototypeSymbol.name]) {
+            const symbolExport = symbol.exports.get(prototypeSymbol.name);
+            if (symbolExport) {
                 if (node.name) {
                     node.name.parent = node;
                 }
-                file.bindDiagnostics.push(createDiagnosticForNode(symbol.exports[prototypeSymbol.name].declarations[0],
-                    Diagnostics.Duplicate_identifier_0, prototypeSymbol.name));
+                file.bindDiagnostics.push(createDiagnosticForNode(symbolExport.declarations[0], Diagnostics.Duplicate_identifier_0, prototypeSymbol.name));
             }
-            symbol.exports[prototypeSymbol.name] = prototypeSymbol;
+            symbol.exports.set(prototypeSymbol.name, prototypeSymbol);
             prototypeSymbol.parent = symbol;
         }
 
@@ -2150,13 +2521,7 @@ namespace ts {
         }
 
         function bindParameter(node: ParameterDeclaration) {
-            if (!isDeclarationFile(file) &&
-                !isInAmbientContext(node) &&
-                nodeIsDecorated(node)) {
-                emitFlags |= (NodeFlags.HasDecorators | NodeFlags.HasParamDecorators);
-            }
-
-            if (inStrictMode) {
+            if (inStrictMode && !isInAmbientContext(node)) {
                 // It is a SyntaxError if the identifier eval or arguments appears within a FormalParameterList of a
                 // strict mode FunctionLikeDeclaration or FunctionExpression(13.1)
                 checkStrictModeEvalOrArguments(node, node.name);
@@ -2178,8 +2543,8 @@ namespace ts {
         }
 
         function bindFunctionDeclaration(node: FunctionDeclaration) {
-            if (!isDeclarationFile(file) && !isInAmbientContext(node)) {
-                if (isAsyncFunctionLike(node)) {
+            if (!file.isDeclarationFile && !isInAmbientContext(node)) {
+                if (isAsyncFunction(node)) {
                     emitFlags |= NodeFlags.HasAsyncFunctions;
                 }
             }
@@ -2195,27 +2560,26 @@ namespace ts {
         }
 
         function bindFunctionExpression(node: FunctionExpression) {
-            if (!isDeclarationFile(file) && !isInAmbientContext(node)) {
-                if (isAsyncFunctionLike(node)) {
+            if (!file.isDeclarationFile && !isInAmbientContext(node)) {
+                if (isAsyncFunction(node)) {
                     emitFlags |= NodeFlags.HasAsyncFunctions;
                 }
             }
             if (currentFlow) {
                 node.flowNode = currentFlow;
             }
-            checkStrictModeFunctionName(<FunctionExpression>node);
-            const bindingName = (<FunctionExpression>node).name ? (<FunctionExpression>node).name.text : "__function";
-            return bindAnonymousDeclaration(<FunctionExpression>node, SymbolFlags.Function, bindingName);
+            checkStrictModeFunctionName(node);
+            const bindingName = node.name ? node.name.text : "__function";
+            return bindAnonymousDeclaration(node, SymbolFlags.Function, bindingName);
         }
 
         function bindPropertyOrMethodOrAccessor(node: Declaration, symbolFlags: SymbolFlags, symbolExcludes: SymbolFlags) {
-            if (!isDeclarationFile(file) && !isInAmbientContext(node)) {
-                if (isAsyncFunctionLike(node)) {
-                    emitFlags |= NodeFlags.HasAsyncFunctions;
-                }
-                if (nodeIsDecorated(node)) {
-                    emitFlags |= NodeFlags.HasDecorators;
-                }
+            if (!file.isDeclarationFile && !isInAmbientContext(node) && isAsyncFunction(node)) {
+                emitFlags |= NodeFlags.HasAsyncFunctions;
+            }
+
+            if (currentFlow && isObjectLiteralOrClassExpressionMethod(node)) {
+                node.flowNode = currentFlow;
             }
 
             return hasDynamicName(node)
@@ -2223,10 +2587,6 @@ namespace ts {
                 : declareSymbolAndAddToSymbolTable(node, symbolFlags, symbolExcludes);
         }
 
-        function bindJSDocProperty(node: JSDocPropertyTag) {
-            return declareSymbolAndAddToSymbolTable(node, SymbolFlags.Property, SymbolFlags.PropertyExcludes);
-        }
-
         // reachability checks
 
         function shouldReportErrorOnModuleDeclaration(node: ModuleDeclaration): boolean {
@@ -2291,6 +2651,9 @@ namespace ts {
             case SyntaxKind.CallExpression:
                 return computeCallExpression(<CallExpression>node, subtreeFlags);
 
+            case SyntaxKind.NewExpression:
+                return computeNewExpression(<NewExpression>node, subtreeFlags);
+
             case SyntaxKind.ModuleDeclaration:
                 return computeModuleDeclaration(<ModuleDeclaration>node, subtreeFlags);
 
@@ -2336,6 +2699,9 @@ namespace ts {
             case SyntaxKind.HeritageClause:
                 return computeHeritageClause(<HeritageClause>node, subtreeFlags);
 
+            case SyntaxKind.CatchClause:
+                return computeCatchClause(<CatchClause>node, subtreeFlags);
+
             case SyntaxKind.ExpressionWithTypeArguments:
                 return computeExpressionWithTypeArguments(<ExpressionWithTypeArguments>node, subtreeFlags);
 
@@ -2368,11 +2734,19 @@ namespace ts {
         const expression = node.expression;
         const expressionKind = expression.kind;
 
-        if (subtreeFlags & TransformFlags.ContainsSpreadElementExpression
+        if (node.typeArguments) {
+            transformFlags |= TransformFlags.AssertTypeScript;
+        }
+
+        if (subtreeFlags & TransformFlags.ContainsSpread
             || isSuperOrSuperProperty(expression, expressionKind)) {
-            // If the this node contains a SpreadElementExpression, or is a super call, then it is an ES6
+            // If the this node contains a SpreadExpression, or is a super call, then it is an ES6
             // node.
-            transformFlags |= TransformFlags.AssertES6;
+            transformFlags |= TransformFlags.AssertES2015;
+        }
+
+        if (expression.kind === SyntaxKind.ImportKeyword) {
+            transformFlags |= TransformFlags.ContainsDynamicImport;
         }
 
         node.transformFlags = transformFlags | TransformFlags.HasComputedFlags;
@@ -2394,21 +2768,38 @@ namespace ts {
         return false;
     }
 
+    function computeNewExpression(node: NewExpression, subtreeFlags: TransformFlags) {
+        let transformFlags = subtreeFlags;
+        if (node.typeArguments) {
+            transformFlags |= TransformFlags.AssertTypeScript;
+        }
+        if (subtreeFlags & TransformFlags.ContainsSpread) {
+            // If the this node contains a SpreadElementExpression then it is an ES6
+            // node.
+            transformFlags |= TransformFlags.AssertES2015;
+        }
+        node.transformFlags = transformFlags | TransformFlags.HasComputedFlags;
+        return transformFlags & ~TransformFlags.ArrayLiteralOrCallOrNewExcludes;
+    }
+
     function computeBinaryExpression(node: BinaryExpression, subtreeFlags: TransformFlags) {
         let transformFlags = subtreeFlags;
         const operatorTokenKind = node.operatorToken.kind;
         const leftKind = node.left.kind;
 
-        if (operatorTokenKind === SyntaxKind.EqualsToken
-            && (leftKind === SyntaxKind.ObjectLiteralExpression
-                || leftKind === SyntaxKind.ArrayLiteralExpression)) {
-            // Destructuring assignments are ES6 syntax.
-            transformFlags |= TransformFlags.AssertES6 | TransformFlags.DestructuringAssignment;
+        if (operatorTokenKind === SyntaxKind.EqualsToken && leftKind === SyntaxKind.ObjectLiteralExpression) {
+            // Destructuring object assignments with are ES2015 syntax
+            // and possibly ESNext if they contain rest
+            transformFlags |= TransformFlags.AssertESNext | TransformFlags.AssertES2015 | TransformFlags.AssertDestructuringAssignment;
+        }
+        else if (operatorTokenKind === SyntaxKind.EqualsToken && leftKind === SyntaxKind.ArrayLiteralExpression) {
+            // Destructuring assignments are ES2015 syntax.
+            transformFlags |= TransformFlags.AssertES2015 | TransformFlags.AssertDestructuringAssignment;
         }
         else if (operatorTokenKind === SyntaxKind.AsteriskAsteriskToken
             || operatorTokenKind === SyntaxKind.AsteriskAsteriskEqualsToken) {
-            // Exponentiation is ES7 syntax.
-            transformFlags |= TransformFlags.AssertES7;
+            // Exponentiation is ES2016 syntax.
+            transformFlags |= TransformFlags.AssertES2016;
         }
 
         node.transformFlags = transformFlags | TransformFlags.HasComputedFlags;
@@ -2422,14 +2813,12 @@ namespace ts {
         const initializer = node.initializer;
         const dotDotDotToken = node.dotDotDotToken;
 
-        // If the parameter has a question token, then it is TypeScript syntax.
-        if (node.questionToken) {
-            transformFlags |= TransformFlags.AssertTypeScript;
-        }
-
-        // If the parameter's name is 'this', then it is TypeScript syntax.
-        if (subtreeFlags & TransformFlags.ContainsDecorators
-            || (name && isIdentifier(name) && name.originalKeywordKind === SyntaxKind.ThisKeyword)) {
+        // The '?' token, type annotations, decorators, and 'this' parameters are TypeSCript
+        // syntax.
+        if (node.questionToken
+            || node.type
+            || subtreeFlags & TransformFlags.ContainsDecorators
+            || isThisIdentifier(name)) {
             transformFlags |= TransformFlags.AssertTypeScript;
         }
 
@@ -2438,10 +2827,15 @@ namespace ts {
             transformFlags |= TransformFlags.AssertTypeScript | TransformFlags.ContainsParameterPropertyAssignments;
         }
 
+        // parameters with object rest destructuring are ES Next syntax
+        if (subtreeFlags & TransformFlags.ContainsObjectRest) {
+            transformFlags |= TransformFlags.AssertESNext;
+        }
+
         // If a parameter has an initializer, a binding pattern or a dotDotDot token, then
         // it is ES6 syntax and its container must emit default value assignments or parameter destructuring downlevel.
         if (subtreeFlags & TransformFlags.ContainsBindingPattern || initializer || dotDotDotToken) {
-            transformFlags |= TransformFlags.AssertES6 | TransformFlags.ContainsDefaultValueAssignments;
+            transformFlags |= TransformFlags.AssertES2015 | TransformFlags.ContainsDefaultValueAssignments;
         }
 
         node.transformFlags = transformFlags | TransformFlags.HasComputedFlags;
@@ -2482,13 +2876,14 @@ namespace ts {
         }
         else {
             // A ClassDeclaration is ES6 syntax.
-            transformFlags = subtreeFlags | TransformFlags.AssertES6;
+            transformFlags = subtreeFlags | TransformFlags.AssertES2015;
 
             // A class with a parameter property assignment, property initializer, or decorator is
             // TypeScript syntax.
-            // An exported declaration may be TypeScript syntax.
+            // An exported declaration may be TypeScript syntax, but is handled by the visitor
+            // for a namespace declaration.
             if ((subtreeFlags & TransformFlags.TypeScriptClassSyntaxMask)
-                || (modifierFlags & ModifierFlags.Export)) {
+                || node.typeParameters) {
                 transformFlags |= TransformFlags.AssertTypeScript;
             }
 
@@ -2505,11 +2900,12 @@ namespace ts {
 
     function computeClassExpression(node: ClassExpression, subtreeFlags: TransformFlags) {
         // A ClassExpression is ES6 syntax.
-        let transformFlags = subtreeFlags | TransformFlags.AssertES6;
+        let transformFlags = subtreeFlags | TransformFlags.AssertES2015;
 
         // A class with a parameter property assignment, property initializer, or decorator is
         // TypeScript syntax.
-        if (subtreeFlags & TransformFlags.TypeScriptClassSyntaxMask) {
+        if (subtreeFlags & TransformFlags.TypeScriptClassSyntaxMask
+            || node.typeParameters) {
             transformFlags |= TransformFlags.AssertTypeScript;
         }
 
@@ -2529,7 +2925,7 @@ namespace ts {
         switch (node.token) {
             case SyntaxKind.ExtendsKeyword:
                 // An `extends` HeritageClause is ES6 syntax.
-                transformFlags |= TransformFlags.AssertES6;
+                transformFlags |= TransformFlags.AssertES2015;
                 break;
 
             case SyntaxKind.ImplementsKeyword:
@@ -2546,10 +2942,21 @@ namespace ts {
         return transformFlags & ~TransformFlags.NodeExcludes;
     }
 
+    function computeCatchClause(node: CatchClause, subtreeFlags: TransformFlags) {
+        let transformFlags = subtreeFlags;
+
+        if (node.variableDeclaration && isBindingPattern(node.variableDeclaration.name)) {
+            transformFlags |= TransformFlags.AssertES2015;
+        }
+
+        node.transformFlags = transformFlags | TransformFlags.HasComputedFlags;
+        return transformFlags & ~TransformFlags.CatchClauseExcludes;
+    }
+
     function computeExpressionWithTypeArguments(node: ExpressionWithTypeArguments, subtreeFlags: TransformFlags) {
         // An ExpressionWithTypeArguments is ES6 syntax, as it is used in the
         // extends clause of a class.
-        let transformFlags = subtreeFlags | TransformFlags.AssertES6;
+        let transformFlags = subtreeFlags | TransformFlags.AssertES2015;
 
         // If an ExpressionWithTypeArguments contains type arguments, then it
         // is TypeScript syntax.
@@ -2563,36 +2970,47 @@ namespace ts {
 
     function computeConstructor(node: ConstructorDeclaration, subtreeFlags: TransformFlags) {
         let transformFlags = subtreeFlags;
-        const body = node.body;
 
-        if (body === undefined) {
-            // An overload constructor is TypeScript syntax.
+        // TypeScript-specific modifiers and overloads are TypeScript syntax
+        if (hasModifier(node, ModifierFlags.TypeScriptModifier)
+            || !node.body) {
             transformFlags |= TransformFlags.AssertTypeScript;
         }
 
+        // function declarations with object rest destructuring are ES Next syntax
+        if (subtreeFlags & TransformFlags.ContainsObjectRest) {
+            transformFlags |= TransformFlags.AssertESNext;
+        }
+
         node.transformFlags = transformFlags | TransformFlags.HasComputedFlags;
         return transformFlags & ~TransformFlags.ConstructorExcludes;
     }
 
     function computeMethod(node: MethodDeclaration, subtreeFlags: TransformFlags) {
         // A MethodDeclaration is ES6 syntax.
-        let transformFlags = subtreeFlags | TransformFlags.AssertES6;
-        const modifierFlags = getModifierFlags(node);
-        const body = node.body;
-        const typeParameters = node.typeParameters;
-        const asteriskToken = node.asteriskToken;
-
-        // A MethodDeclaration is TypeScript syntax if it is either async, abstract, overloaded,
-        // generic, or has a decorator.
-        if (!body
-            || typeParameters
-            || (modifierFlags & (ModifierFlags.Async | ModifierFlags.Abstract))
-            || (subtreeFlags & TransformFlags.ContainsDecorators)) {
+        let transformFlags = subtreeFlags | TransformFlags.AssertES2015;
+
+        // Decorators, TypeScript-specific modifiers, type parameters, type annotations, and
+        // overloads are TypeScript syntax.
+        if (node.decorators
+            || hasModifier(node, ModifierFlags.TypeScriptModifier)
+            || node.typeParameters
+            || node.type
+            || !node.body) {
             transformFlags |= TransformFlags.AssertTypeScript;
         }
 
-        // Currently, we only support generators that were originally async function bodies.
-        if (asteriskToken && getEmitFlags(node) & EmitFlags.AsyncFunctionBody) {
+        // function declarations with object rest destructuring are ES Next syntax
+        if (subtreeFlags & TransformFlags.ContainsObjectRest) {
+            transformFlags |= TransformFlags.AssertESNext;
+        }
+
+        // An async method declaration is ES2017 syntax.
+        if (hasModifier(node, ModifierFlags.Async)) {
+            transformFlags |= node.asteriskToken ? TransformFlags.AssertESNext : TransformFlags.AssertES2017;
+        }
+
+        if (node.asteriskToken) {
             transformFlags |= TransformFlags.AssertGenerator;
         }
 
@@ -2602,17 +3020,21 @@ namespace ts {
 
     function computeAccessor(node: AccessorDeclaration, subtreeFlags: TransformFlags) {
         let transformFlags = subtreeFlags;
-        const modifierFlags = getModifierFlags(node);
-        const body = node.body;
 
-        // A MethodDeclaration is TypeScript syntax if it is either async, abstract, overloaded,
-        // generic, or has a decorator.
-        if (!body
-            || (modifierFlags & (ModifierFlags.Async | ModifierFlags.Abstract))
-            || (subtreeFlags & TransformFlags.ContainsDecorators)) {
+        // Decorators, TypeScript-specific modifiers, type annotations, and overloads are
+        // TypeScript syntax.
+        if (node.decorators
+            || hasModifier(node, ModifierFlags.TypeScriptModifier)
+            || node.type
+            || !node.body) {
             transformFlags |= TransformFlags.AssertTypeScript;
         }
 
+        // function declarations with object rest destructuring are ES Next syntax
+        if (subtreeFlags & TransformFlags.ContainsObjectRest) {
+            transformFlags |= TransformFlags.AssertESNext;
+        }
+
         node.transformFlags = transformFlags | TransformFlags.HasComputedFlags;
         return transformFlags & ~TransformFlags.MethodOrAccessorExcludes;
     }
@@ -2635,7 +3057,6 @@ namespace ts {
         let transformFlags: TransformFlags;
         const modifierFlags = getModifierFlags(node);
         const body = node.body;
-        const asteriskToken = node.asteriskToken;
 
         if (!body || (modifierFlags & ModifierFlags.Ambient)) {
             // An ambient declaration is TypeScript syntax.
@@ -2645,21 +3066,29 @@ namespace ts {
         else {
             transformFlags = subtreeFlags | TransformFlags.ContainsHoistedDeclarationOrCompletion;
 
-            // If a FunctionDeclaration is exported, then it is either ES6 or TypeScript syntax.
-            if (modifierFlags & ModifierFlags.Export) {
-                transformFlags |= TransformFlags.AssertTypeScript | TransformFlags.AssertES6;
+            // TypeScript-specific modifiers, type parameters, and type annotations are TypeScript
+            // syntax.
+            if (modifierFlags & ModifierFlags.TypeScriptModifier
+                || node.typeParameters
+                || node.type) {
+                transformFlags |= TransformFlags.AssertTypeScript;
             }
 
-            // If a FunctionDeclaration is async, then it is TypeScript syntax.
+            // An async function declaration is ES2017 syntax.
             if (modifierFlags & ModifierFlags.Async) {
-                transformFlags |= TransformFlags.AssertTypeScript;
+                transformFlags |= node.asteriskToken ? TransformFlags.AssertESNext : TransformFlags.AssertES2017;
+            }
+
+            // function declarations with object rest destructuring are ES Next syntax
+            if (subtreeFlags & TransformFlags.ContainsObjectRest) {
+                transformFlags |= TransformFlags.AssertESNext;
             }
 
             // If a FunctionDeclaration's subtree has marked the container as needing to capture the
             // lexical this, or the function contains parameters with initializers, then this node is
             // ES6 syntax.
-            if (subtreeFlags & TransformFlags.ES6FunctionSyntaxMask) {
-                transformFlags |= TransformFlags.AssertES6;
+            if (subtreeFlags & TransformFlags.ES2015FunctionSyntaxMask) {
+                transformFlags |= TransformFlags.AssertES2015;
             }
 
             // If a FunctionDeclaration is generator function and is the body of a
@@ -2667,7 +3096,7 @@ namespace ts {
             // down-level generator.
             // Currently we do not support transforming any other generator fucntions
             // down level.
-            if (asteriskToken && getEmitFlags(node) & EmitFlags.AsyncFunctionBody) {
+            if (node.asteriskToken) {
                 transformFlags |= TransformFlags.AssertGenerator;
             }
         }
@@ -2678,27 +3107,37 @@ namespace ts {
 
     function computeFunctionExpression(node: FunctionExpression, subtreeFlags: TransformFlags) {
         let transformFlags = subtreeFlags;
-        const modifierFlags = getModifierFlags(node);
-        const asteriskToken = node.asteriskToken;
 
-        // An async function expression is TypeScript syntax.
-        if (modifierFlags & ModifierFlags.Async) {
+        // TypeScript-specific modifiers, type parameters, and type annotations are TypeScript
+        // syntax.
+        if (hasModifier(node, ModifierFlags.TypeScriptModifier)
+            || node.typeParameters
+            || node.type) {
             transformFlags |= TransformFlags.AssertTypeScript;
         }
 
+        // An async function expression is ES2017 syntax.
+        if (hasModifier(node, ModifierFlags.Async)) {
+            transformFlags |= node.asteriskToken ? TransformFlags.AssertESNext : TransformFlags.AssertES2017;
+        }
+
+        // function expressions with object rest destructuring are ES Next syntax
+        if (subtreeFlags & TransformFlags.ContainsObjectRest) {
+            transformFlags |= TransformFlags.AssertESNext;
+        }
+
+
         // If a FunctionExpression's subtree has marked the container as needing to capture the
         // lexical this, or the function contains parameters with initializers, then this node is
         // ES6 syntax.
-        if (subtreeFlags & TransformFlags.ES6FunctionSyntaxMask) {
-            transformFlags |= TransformFlags.AssertES6;
+        if (subtreeFlags & TransformFlags.ES2015FunctionSyntaxMask) {
+            transformFlags |= TransformFlags.AssertES2015;
         }
 
         // If a FunctionExpression is generator function and is the body of a
         // transformed async function, then this node can be transformed to a
         // down-level generator.
-        // Currently we do not support transforming any other generator fucntions
-        // down level.
-        if (asteriskToken && getEmitFlags(node) & EmitFlags.AsyncFunctionBody) {
+        if (node.asteriskToken) {
             transformFlags |= TransformFlags.AssertGenerator;
         }
 
@@ -2708,14 +3147,26 @@ namespace ts {
 
     function computeArrowFunction(node: ArrowFunction, subtreeFlags: TransformFlags) {
         // An ArrowFunction is ES6 syntax, and excludes markers that should not escape the scope of an ArrowFunction.
-        let transformFlags = subtreeFlags | TransformFlags.AssertES6;
-        const modifierFlags = getModifierFlags(node);
+        let transformFlags = subtreeFlags | TransformFlags.AssertES2015;
 
-        // An async arrow function is TypeScript syntax.
-        if (modifierFlags & ModifierFlags.Async) {
+        // TypeScript-specific modifiers, type parameters, and type annotations are TypeScript
+        // syntax.
+        if (hasModifier(node, ModifierFlags.TypeScriptModifier)
+            || node.typeParameters
+            || node.type) {
             transformFlags |= TransformFlags.AssertTypeScript;
         }
 
+        // An async arrow function is ES2017 syntax.
+        if (hasModifier(node, ModifierFlags.Async)) {
+            transformFlags |= TransformFlags.AssertES2017;
+        }
+
+        // arrow functions with object rest destructuring are ES Next syntax
+        if (subtreeFlags & TransformFlags.ContainsObjectRest) {
+            transformFlags |= TransformFlags.AssertESNext;
+        }
+
         // If an ArrowFunction contains a lexical this, its container must capture the lexical this.
         if (subtreeFlags & TransformFlags.ContainsLexicalThis) {
             transformFlags |= TransformFlags.ContainsCapturedLexicalThis;
@@ -2742,11 +3193,16 @@ namespace ts {
 
     function computeVariableDeclaration(node: VariableDeclaration, subtreeFlags: TransformFlags) {
         let transformFlags = subtreeFlags;
-        const nameKind = node.name.kind;
+        transformFlags |= TransformFlags.AssertES2015 | TransformFlags.ContainsBindingPattern;
 
-        // A VariableDeclaration with a binding pattern is ES6 syntax.
-        if (nameKind === SyntaxKind.ObjectBindingPattern || nameKind === SyntaxKind.ArrayBindingPattern) {
-            transformFlags |= TransformFlags.AssertES6 | TransformFlags.ContainsBindingPattern;
+        // A VariableDeclaration containing ObjectRest is ESNext syntax
+        if (subtreeFlags & TransformFlags.ContainsObjectRest) {
+            transformFlags |= TransformFlags.AssertESNext;
+        }
+
+        // Type annotations are TypeScript syntax.
+        if (node.type) {
+            transformFlags |= TransformFlags.AssertTypeScript;
         }
 
         node.transformFlags = transformFlags | TransformFlags.HasComputedFlags;
@@ -2765,13 +3221,8 @@ namespace ts {
         else {
             transformFlags = subtreeFlags;
 
-            // If a VariableStatement is exported, then it is either ES6 or TypeScript syntax.
-            if (modifierFlags & ModifierFlags.Export) {
-                transformFlags |= TransformFlags.AssertES6 | TransformFlags.AssertTypeScript;
-            }
-
             if (declarationListTransformFlags & TransformFlags.ContainsBindingPattern) {
-                transformFlags |= TransformFlags.AssertES6;
+                transformFlags |= TransformFlags.AssertES2015;
             }
         }
 
@@ -2785,7 +3236,7 @@ namespace ts {
         // A labeled statement containing a block scoped binding *may* need to be transformed from ES6.
         if (subtreeFlags & TransformFlags.ContainsBlockScopedBinding
             && isIterationStatement(node, /*lookInLabeledStatements*/ true)) {
-            transformFlags |= TransformFlags.AssertES6;
+            transformFlags |= TransformFlags.AssertES2015;
         }
 
         node.transformFlags = transformFlags | TransformFlags.HasComputedFlags;
@@ -2811,7 +3262,7 @@ namespace ts {
         // then we treat the statement as ES6 so that we can indicate that we do not
         // need to hold on to the right-hand side.
         if (node.expression.transformFlags & TransformFlags.DestructuringAssignment) {
-            transformFlags |= TransformFlags.AssertES6;
+            transformFlags |= TransformFlags.AssertES2015;
         }
 
         node.transformFlags = transformFlags | TransformFlags.HasComputedFlags;
@@ -2834,12 +3285,12 @@ namespace ts {
         let transformFlags = subtreeFlags | TransformFlags.ContainsHoistedDeclarationOrCompletion;
 
         if (subtreeFlags & TransformFlags.ContainsBindingPattern) {
-            transformFlags |= TransformFlags.AssertES6;
+            transformFlags |= TransformFlags.AssertES2015;
         }
 
         // If a VariableDeclarationList is `let` or `const`, then it is ES6 syntax.
         if (node.flags & NodeFlags.BlockScoped) {
-            transformFlags |= TransformFlags.AssertES6 | TransformFlags.ContainsBlockScopedBinding;
+            transformFlags |= TransformFlags.AssertES2015 | TransformFlags.ContainsBlockScopedBinding;
         }
 
         node.transformFlags = transformFlags | TransformFlags.HasComputedFlags;
@@ -2852,14 +3303,18 @@ namespace ts {
         let excludeFlags = TransformFlags.NodeExcludes;
 
         switch (kind) {
+            case SyntaxKind.AsyncKeyword:
+            case SyntaxKind.AwaitExpression:
+                // async/await is ES2017 syntax, but may be ESNext syntax (for async generators)
+                transformFlags |= TransformFlags.AssertESNext | TransformFlags.AssertES2017;
+                break;
+
             case SyntaxKind.PublicKeyword:
             case SyntaxKind.PrivateKeyword:
             case SyntaxKind.ProtectedKeyword:
             case SyntaxKind.AbstractKeyword:
             case SyntaxKind.DeclareKeyword:
-            case SyntaxKind.AsyncKeyword:
             case SyntaxKind.ConstKeyword:
-            case SyntaxKind.AwaitExpression:
             case SyntaxKind.EnumDeclaration:
             case SyntaxKind.EnumMember:
             case SyntaxKind.TypeAssertionExpression:
@@ -2876,18 +3331,13 @@ namespace ts {
             case SyntaxKind.JsxText:
             case SyntaxKind.JsxClosingElement:
             case SyntaxKind.JsxAttribute:
+            case SyntaxKind.JsxAttributes:
             case SyntaxKind.JsxSpreadAttribute:
             case SyntaxKind.JsxExpression:
                 // These nodes are Jsx syntax.
                 transformFlags |= TransformFlags.AssertJsx;
                 break;
 
-            case SyntaxKind.ExportKeyword:
-                // This node is both ES6 and TypeScript syntax.
-                transformFlags |= TransformFlags.AssertES6 | TransformFlags.AssertTypeScript;
-                break;
-
-            case SyntaxKind.DefaultKeyword:
             case SyntaxKind.NoSubstitutionTemplateLiteral:
             case SyntaxKind.TemplateHead:
             case SyntaxKind.TemplateMiddle:
@@ -2895,19 +3345,42 @@ namespace ts {
             case SyntaxKind.TemplateExpression:
             case SyntaxKind.TaggedTemplateExpression:
             case SyntaxKind.ShorthandPropertyAssignment:
-            case SyntaxKind.ForOfStatement:
+            case SyntaxKind.StaticKeyword:
+            case SyntaxKind.MetaProperty:
                 // These nodes are ES6 syntax.
-                transformFlags |= TransformFlags.AssertES6;
+                transformFlags |= TransformFlags.AssertES2015;
+                break;
+
+            case SyntaxKind.StringLiteral:
+                if ((<StringLiteral>node).hasExtendedUnicodeEscape) {
+                    transformFlags |= TransformFlags.AssertES2015;
+                }
+                break;
+
+            case SyntaxKind.NumericLiteral:
+                if ((<NumericLiteral>node).numericLiteralFlags & NumericLiteralFlags.BinaryOrOctalSpecifier) {
+                    transformFlags |= TransformFlags.AssertES2015;
+                }
+                break;
+
+            case SyntaxKind.ForOfStatement:
+                // This node is either ES2015 syntax or ES2017 syntax (if it is a for-await-of).
+                if ((<ForOfStatement>node).awaitModifier) {
+                    transformFlags |= TransformFlags.AssertESNext;
+                }
+                transformFlags |= TransformFlags.AssertES2015;
                 break;
 
             case SyntaxKind.YieldExpression:
-                // This node is ES6 syntax.
-                transformFlags |= TransformFlags.AssertES6 | TransformFlags.ContainsYield;
+                // This node is either ES2015 syntax (in a generator) or ES2017 syntax (in an async
+                // generator).
+                transformFlags |= TransformFlags.AssertESNext | TransformFlags.AssertES2015 | TransformFlags.ContainsYield;
                 break;
 
             case SyntaxKind.AnyKeyword:
             case SyntaxKind.NumberKeyword:
             case SyntaxKind.NeverKeyword:
+            case SyntaxKind.ObjectKeyword:
             case SyntaxKind.StringKeyword:
             case SyntaxKind.BooleanKeyword:
             case SyntaxKind.SymbolKeyword:
@@ -2932,7 +3405,11 @@ namespace ts {
             case SyntaxKind.InterfaceDeclaration:
             case SyntaxKind.TypeAliasDeclaration:
             case SyntaxKind.ThisType:
+            case SyntaxKind.TypeOperator:
+            case SyntaxKind.IndexedAccessType:
+            case SyntaxKind.MappedType:
             case SyntaxKind.LiteralType:
+            case SyntaxKind.NamespaceExportDeclaration:
                 // Types and signatures are TypeScript syntax, and exclude all other facts.
                 transformFlags = TransformFlags.AssertTypeScript;
                 excludeFlags = TransformFlags.TypeExcludes;
@@ -2956,14 +3433,17 @@ namespace ts {
                 }
                 break;
 
-            case SyntaxKind.SpreadElementExpression:
-                // This node is ES6 syntax, but is handled by a containing node.
-                transformFlags |= TransformFlags.ContainsSpreadElementExpression;
+            case SyntaxKind.SpreadElement:
+                transformFlags |= TransformFlags.AssertES2015 | TransformFlags.ContainsSpread;
+                break;
+
+            case SyntaxKind.SpreadAssignment:
+                transformFlags |= TransformFlags.AssertESNext | TransformFlags.ContainsObjectSpread;
                 break;
 
             case SyntaxKind.SuperKeyword:
                 // This node is ES6 syntax.
-                transformFlags |= TransformFlags.AssertES6;
+                transformFlags |= TransformFlags.AssertES2015;
                 break;
 
             case SyntaxKind.ThisKeyword:
@@ -2972,9 +3452,23 @@ namespace ts {
                 break;
 
             case SyntaxKind.ObjectBindingPattern:
+                transformFlags |= TransformFlags.AssertES2015 | TransformFlags.ContainsBindingPattern;
+                if (subtreeFlags & TransformFlags.ContainsRest) {
+                    transformFlags |= TransformFlags.AssertESNext | TransformFlags.ContainsObjectRest;
+                }
+                excludeFlags = TransformFlags.BindingPatternExcludes;
+                break;
+
             case SyntaxKind.ArrayBindingPattern:
-                // These nodes are ES6 syntax.
-                transformFlags |= TransformFlags.AssertES6 | TransformFlags.ContainsBindingPattern;
+                transformFlags |= TransformFlags.AssertES2015 | TransformFlags.ContainsBindingPattern;
+                excludeFlags = TransformFlags.BindingPatternExcludes;
+                break;
+
+            case SyntaxKind.BindingElement:
+                transformFlags |= TransformFlags.AssertES2015;
+                if ((<BindingElement>node).dotDotDotToken) {
+                    transformFlags |= TransformFlags.ContainsRest;
+                }
                 break;
 
             case SyntaxKind.Decorator:
@@ -2987,7 +3481,7 @@ namespace ts {
                 if (subtreeFlags & TransformFlags.ContainsComputedPropertyName) {
                     // If an ObjectLiteralExpression contains a ComputedPropertyName, then it
                     // is an ES6 node.
-                    transformFlags |= TransformFlags.AssertES6;
+                    transformFlags |= TransformFlags.AssertES2015;
                 }
 
                 if (subtreeFlags & TransformFlags.ContainsLexicalThisInComputedPropertyName) {
@@ -2996,15 +3490,21 @@ namespace ts {
                     transformFlags |= TransformFlags.ContainsLexicalThis;
                 }
 
+                if (subtreeFlags & TransformFlags.ContainsObjectSpread) {
+                    // If an ObjectLiteralExpression contains a spread element, then it
+                    // is an ES next node.
+                    transformFlags |= TransformFlags.AssertESNext;
+                }
+
                 break;
 
             case SyntaxKind.ArrayLiteralExpression:
             case SyntaxKind.NewExpression:
                 excludeFlags = TransformFlags.ArrayLiteralOrCallOrNewExcludes;
-                if (subtreeFlags & TransformFlags.ContainsSpreadElementExpression) {
-                    // If the this node contains a SpreadElementExpression, then it is an ES6
+                if (subtreeFlags & TransformFlags.ContainsSpread) {
+                    // If the this node contains a SpreadExpression, then it is an ES6
                     // node.
-                    transformFlags |= TransformFlags.AssertES6;
+                    transformFlags |= TransformFlags.AssertES2015;
                 }
 
                 break;
@@ -3015,14 +3515,14 @@ namespace ts {
             case SyntaxKind.ForInStatement:
                 // A loop containing a block scoped binding *may* need to be transformed from ES6.
                 if (subtreeFlags & TransformFlags.ContainsBlockScopedBinding) {
-                    transformFlags |= TransformFlags.AssertES6;
+                    transformFlags |= TransformFlags.AssertES2015;
                 }
 
                 break;
 
             case SyntaxKind.SourceFile:
                 if (subtreeFlags & TransformFlags.ContainsCapturedLexicalThis) {
-                    transformFlags |= TransformFlags.AssertES6;
+                    transformFlags |= TransformFlags.AssertES2015;
                 }
 
                 break;
@@ -3037,4 +3537,80 @@ namespace ts {
         node.transformFlags = transformFlags | TransformFlags.HasComputedFlags;
         return transformFlags & ~excludeFlags;
     }
-}
+
+    /**
+     * Gets the transform flags to exclude when unioning the transform flags of a subtree.
+     *
+     * NOTE: This needs to be kept up-to-date with the exclusions used in `computeTransformFlagsForNode`.
+     *       For performance reasons, `computeTransformFlagsForNode` uses local constant values rather
+     *       than calling this function.
+     */
+    /* @internal */
+    export function getTransformFlagsSubtreeExclusions(kind: SyntaxKind) {
+        if (kind >= SyntaxKind.FirstTypeNode && kind <= SyntaxKind.LastTypeNode) {
+            return TransformFlags.TypeExcludes;
+        }
+
+        switch (kind) {
+            case SyntaxKind.CallExpression:
+            case SyntaxKind.NewExpression:
+            case SyntaxKind.ArrayLiteralExpression:
+                return TransformFlags.ArrayLiteralOrCallOrNewExcludes;
+            case SyntaxKind.ModuleDeclaration:
+                return TransformFlags.ModuleExcludes;
+            case SyntaxKind.Parameter:
+                return TransformFlags.ParameterExcludes;
+            case SyntaxKind.ArrowFunction:
+                return TransformFlags.ArrowFunctionExcludes;
+            case SyntaxKind.FunctionExpression:
+            case SyntaxKind.FunctionDeclaration:
+                return TransformFlags.FunctionExcludes;
+            case SyntaxKind.VariableDeclarationList:
+                return TransformFlags.VariableDeclarationListExcludes;
+            case SyntaxKind.ClassDeclaration:
+            case SyntaxKind.ClassExpression:
+                return TransformFlags.ClassExcludes;
+            case SyntaxKind.Constructor:
+                return TransformFlags.ConstructorExcludes;
+            case SyntaxKind.MethodDeclaration:
+            case SyntaxKind.GetAccessor:
+            case SyntaxKind.SetAccessor:
+                return TransformFlags.MethodOrAccessorExcludes;
+            case SyntaxKind.AnyKeyword:
+            case SyntaxKind.NumberKeyword:
+            case SyntaxKind.NeverKeyword:
+            case SyntaxKind.StringKeyword:
+            case SyntaxKind.ObjectKeyword:
+            case SyntaxKind.BooleanKeyword:
+            case SyntaxKind.SymbolKeyword:
+            case SyntaxKind.VoidKeyword:
+            case SyntaxKind.TypeParameter:
+            case SyntaxKind.PropertySignature:
+            case SyntaxKind.MethodSignature:
+            case SyntaxKind.CallSignature:
+            case SyntaxKind.ConstructSignature:
+            case SyntaxKind.IndexSignature:
+            case SyntaxKind.InterfaceDeclaration:
+            case SyntaxKind.TypeAliasDeclaration:
+                return TransformFlags.TypeExcludes;
+            case SyntaxKind.ObjectLiteralExpression:
+                return TransformFlags.ObjectLiteralExcludes;
+            case SyntaxKind.CatchClause:
+                return TransformFlags.CatchClauseExcludes;
+            case SyntaxKind.ObjectBindingPattern:
+            case SyntaxKind.ArrayBindingPattern:
+                return TransformFlags.BindingPatternExcludes;
+            default:
+                return TransformFlags.NodeExcludes;
+        }
+    }
+
+    /**
+     * "Binds" JSDoc nodes in TypeScript code.
+     * Since we will never create symbols for JSDoc, we just set parent pointers instead.
+     */
+    function setParentPointers(parent: Node, child: Node): void {
+        child.parent = parent;
+        forEachChild(child, (childsChild) => setParentPointers(child, childsChild));
+    }
+}
\ No newline at end of file
diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index bf7e4ef..05c20ff 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -27,6 +27,12 @@ namespace ts {
         return symbol.id;
     }
 
+    export function isInstantiatedModule(node: ModuleDeclaration, preserveConstEnums: boolean) {
+        const moduleState = getModuleInstanceState(node);
+        return moduleState === ModuleInstanceState.Instantiated ||
+            (preserveConstEnums && moduleState === ModuleInstanceState.ConstEnumOnly);
+    }
+
     export function createTypeChecker(host: TypeCheckerHost, produceDiagnostics: boolean): TypeChecker {
         // Cancellation that controls whether or not we can cancel in the middle of type checking.
         // In general cancelling is *not* safe for the type checker.  We might be in the middle of
@@ -38,6 +44,8 @@ namespace ts {
         // is because diagnostics can be quite expensive, and we want to allow hosts to bail out if
         // they no longer need the information (for example, if the user started editing again).
         let cancellationToken: CancellationToken;
+        let requestedExternalEmitHelpers: ExternalEmitHelpers;
+        let externalHelpersModule: Symbol;
 
         const Symbol = objectAllocator.getSymbolConstructor();
         const Type = objectAllocator.getTypeConstructor();
@@ -45,23 +53,33 @@ namespace ts {
 
         let typeCount = 0;
         let symbolCount = 0;
+        let enumCount = 0;
+        let symbolInstantiationDepth = 0;
 
         const emptyArray: any[] = [];
         const emptySymbols = createMap<Symbol>();
 
         const compilerOptions = host.getCompilerOptions();
-        const languageVersion = compilerOptions.target || ScriptTarget.ES3;
+        const languageVersion = getEmitScriptTarget(compilerOptions);
         const modulekind = getEmitModuleKind(compilerOptions);
         const noUnusedIdentifiers = !!compilerOptions.noUnusedLocals || !!compilerOptions.noUnusedParameters;
         const allowSyntheticDefaultImports = typeof compilerOptions.allowSyntheticDefaultImports !== "undefined" ? compilerOptions.allowSyntheticDefaultImports : modulekind === ModuleKind.System;
-        const strictNullChecks = compilerOptions.strictNullChecks;
+        const strictNullChecks = compilerOptions.strictNullChecks === undefined ? compilerOptions.strict : compilerOptions.strictNullChecks;
+        const noImplicitAny = compilerOptions.noImplicitAny === undefined ? compilerOptions.strict : compilerOptions.noImplicitAny;
+        const noImplicitThis = compilerOptions.noImplicitThis === undefined ? compilerOptions.strict : compilerOptions.noImplicitThis;
 
         const emitResolver = createResolver();
+        const nodeBuilder = createNodeBuilder();
 
-        const undefinedSymbol = createSymbol(SymbolFlags.Property | SymbolFlags.Transient, "undefined");
+        const undefinedSymbol = createSymbol(SymbolFlags.Property, "undefined");
         undefinedSymbol.declarations = [];
-        const argumentsSymbol = createSymbol(SymbolFlags.Property | SymbolFlags.Transient, "arguments");
+        const argumentsSymbol = createSymbol(SymbolFlags.Property, "arguments");
 
+        // for public members that accept a Node or one of its subtypes, we must guard against
+        // synthetic nodes created during transformations by calling `getParseTreeNode`.
+        // for most of these, we perform the guard only on `checker` to avoid any possible
+        // extra cost of calling `getParseTreeNode` when calling these functions from inside the
+        // checker.
         const checker: TypeChecker = {
             getNodeCount: () => sum(host.getSourceFiles(), "nodeCount"),
             getIdentifierCount: () => sum(host.getSourceFiles(), "identifierCount"),
@@ -70,56 +88,153 @@ namespace ts {
             isUndefinedSymbol: symbol => symbol === undefinedSymbol,
             isArgumentsSymbol: symbol => symbol === argumentsSymbol,
             isUnknownSymbol: symbol => symbol === unknownSymbol,
+            getMergedSymbol,
             getDiagnostics,
             getGlobalDiagnostics,
-            getTypeOfSymbolAtLocation,
-            getSymbolsOfParameterPropertyDeclaration,
+            getTypeOfSymbolAtLocation: (symbol, location) => {
+                location = getParseTreeNode(location);
+                return location ? getTypeOfSymbolAtLocation(symbol, location) : unknownType;
+            },
+            getSymbolsOfParameterPropertyDeclaration: (parameter, parameterName) => {
+                parameter = getParseTreeNode(parameter, isParameter);
+                Debug.assert(parameter !== undefined, "Cannot get symbols of a synthetic parameter that cannot be resolved to a parse-tree node.");
+                return getSymbolsOfParameterPropertyDeclaration(parameter, parameterName);
+            },
             getDeclaredTypeOfSymbol,
             getPropertiesOfType,
             getPropertyOfType,
+            getIndexInfoOfType,
             getSignaturesOfType,
             getIndexTypeOfType,
             getBaseTypes,
+            getBaseTypeOfLiteralType,
+            getWidenedType,
+            getTypeFromTypeNode: node => {
+                node = getParseTreeNode(node, isTypeNode);
+                return node ? getTypeFromTypeNode(node) : unknownType;
+            },
+            getParameterType: getTypeAtPosition,
             getReturnTypeOfSignature,
             getNonNullableType,
-            getSymbolsInScope,
-            getSymbolAtLocation,
-            getShorthandAssignmentValueSymbol,
-            getExportSpecifierLocalTargetSymbol,
-            getTypeAtLocation: getTypeOfNode,
-            getPropertySymbolOfDestructuringAssignment,
-            typeToString,
+            typeToTypeNode: nodeBuilder.typeToTypeNode,
+            indexInfoToIndexSignatureDeclaration: nodeBuilder.indexInfoToIndexSignatureDeclaration,
+            signatureToSignatureDeclaration: nodeBuilder.signatureToSignatureDeclaration,
+            getSymbolsInScope: (location, meaning) => {
+                location = getParseTreeNode(location);
+                return location ? getSymbolsInScope(location, meaning) : [];
+            },
+            getSymbolAtLocation: node => {
+                node = getParseTreeNode(node);
+                return node ? getSymbolAtLocation(node) : undefined;
+            },
+            getShorthandAssignmentValueSymbol: node => {
+                node = getParseTreeNode(node);
+                return node ? getShorthandAssignmentValueSymbol(node) : undefined;
+            },
+            getExportSpecifierLocalTargetSymbol: node => {
+                node = getParseTreeNode(node, isExportSpecifier);
+                return node ? getExportSpecifierLocalTargetSymbol(node) : undefined;
+            },
+            getTypeAtLocation: node => {
+                node = getParseTreeNode(node);
+                return node ? getTypeOfNode(node) : unknownType;
+            },
+            getPropertySymbolOfDestructuringAssignment: location => {
+                location = getParseTreeNode(location, isIdentifier);
+                return location ? getPropertySymbolOfDestructuringAssignment(location) : undefined;
+            },
+            signatureToString: (signature, enclosingDeclaration?, flags?, kind?) => {
+                return signatureToString(signature, getParseTreeNode(enclosingDeclaration), flags, kind);
+            },
+            typeToString: (type, enclosingDeclaration?, flags?) => {
+                return typeToString(type, getParseTreeNode(enclosingDeclaration), flags);
+            },
             getSymbolDisplayBuilder,
-            symbolToString,
+            symbolToString: (symbol, enclosingDeclaration?, meaning?) => {
+                return symbolToString(symbol, getParseTreeNode(enclosingDeclaration), meaning);
+            },
             getAugmentedPropertiesOfType,
             getRootSymbols,
-            getContextualType,
+            getContextualType: node => {
+                node = getParseTreeNode(node, isExpression);
+                return node ? getContextualType(node) : undefined;
+            },
             getFullyQualifiedName,
-            getResolvedSignature,
-            getConstantValue,
-            isValidPropertyAccess,
-            getSignatureFromDeclaration,
-            isImplementationOfOverload,
+            getResolvedSignature: (node, candidatesOutArray?) => {
+                node = getParseTreeNode(node, isCallLikeExpression);
+                return node ? getResolvedSignature(node, candidatesOutArray) : undefined;
+            },
+            getConstantValue: node => {
+                node = getParseTreeNode(node, canHaveConstantValue);
+                return node ? getConstantValue(node) : undefined;
+            },
+            isValidPropertyAccess: (node, propertyName) => {
+                node = getParseTreeNode(node, isPropertyAccessOrQualifiedName);
+                return node ? isValidPropertyAccess(node, propertyName) : false;
+            },
+            getSignatureFromDeclaration: declaration => {
+                declaration = getParseTreeNode(declaration, isFunctionLike);
+                return declaration ? getSignatureFromDeclaration(declaration) : undefined;
+            },
+            isImplementationOfOverload: node => {
+                node = getParseTreeNode(node, isFunctionLike);
+                return node ? isImplementationOfOverload(node) : undefined;
+            },
+            getImmediateAliasedSymbol: symbol => {
+                Debug.assert((symbol.flags & SymbolFlags.Alias) !== 0, "Should only get Alias here.");
+                const links = getSymbolLinks(symbol);
+                if (!links.immediateTarget) {
+                    const node = getDeclarationOfAliasSymbol(symbol);
+                    Debug.assert(!!node);
+                    links.immediateTarget = getTargetOfAliasDeclaration(node, /*dontRecursivelyResolve*/ true);
+                }
+
+                return links.immediateTarget;
+            },
             getAliasedSymbol: resolveAlias,
             getEmitResolver,
             getExportsOfModule: getExportsOfModuleAsArray,
+            getExportsAndPropertiesOfModule,
             getAmbientModules,
-
-            getJsxElementAttributesType,
+            getAllAttributesTypeFromJsxOpeningLikeElement: node => {
+                node = getParseTreeNode(node, isJsxOpeningLikeElement);
+                return node ? getAllAttributesTypeFromJsxOpeningLikeElement(node) : undefined;
+            },
             getJsxIntrinsicTagNames,
-            isOptionalParameter
+            isOptionalParameter: node => {
+                node = getParseTreeNode(node, isParameter);
+                return node ? isOptionalParameter(node) : false;
+            },
+            tryGetMemberInModuleExports,
+            tryFindAmbientModuleWithoutAugmentations: moduleName => {
+                // we deliberately exclude augmentations
+                // since we are only interested in declarations of the module itself
+                return tryFindAmbientModule(moduleName, /*withAugmentations*/ false);
+            },
+            getApparentType,
+            getAllPossiblePropertiesOfType,
+            getSuggestionForNonexistentProperty,
+            getSuggestionForNonexistentSymbol,
+            getBaseConstraintOfType,
+            getJsxNamespace,
+            resolveNameAtLocation(location: Node, name: string, meaning: SymbolFlags): Symbol | undefined {
+                location = getParseTreeNode(location);
+                return resolveName(location, name, meaning, /*nameNotFoundMessage*/ undefined, name);
+            },
         };
 
         const tupleTypes: GenericType[] = [];
         const unionTypes = createMap<UnionType>();
         const intersectionTypes = createMap<IntersectionType>();
-        const stringLiteralTypes = createMap<LiteralType>();
-        const numericLiteralTypes = createMap<LiteralType>();
+        const literalTypes = createMap<LiteralType>();
+        const indexedAccessTypes = createMap<IndexedAccessType>();
+        const evolvingArrayTypes: EvolvingArrayType[] = [];
 
-        const unknownSymbol = createSymbol(SymbolFlags.Property | SymbolFlags.Transient, "unknown");
-        const resolvingSymbol = createSymbol(SymbolFlags.Transient, "__resolving__");
+        const unknownSymbol = createSymbol(SymbolFlags.Property, "unknown");
+        const resolvingSymbol = createSymbol(0, "__resolving__");
 
         const anyType = createIntrinsicType(TypeFlags.Any, "any");
+        const autoType = createIntrinsicType(TypeFlags.Any, "any");
         const unknownType = createIntrinsicType(TypeFlags.Any, "unknown");
         const undefinedType = createIntrinsicType(TypeFlags.Undefined, "undefined");
         const undefinedWideningType = strictNullChecks ? undefinedType : createIntrinsicType(TypeFlags.Undefined | TypeFlags.ContainsWideningType, "undefined");
@@ -134,8 +249,14 @@ namespace ts {
         const voidType = createIntrinsicType(TypeFlags.Void, "void");
         const neverType = createIntrinsicType(TypeFlags.Never, "never");
         const silentNeverType = createIntrinsicType(TypeFlags.Never, "never");
+        const nonPrimitiveType = createIntrinsicType(TypeFlags.NonPrimitive, "object");
 
         const emptyObjectType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
+
+        const emptyTypeLiteralSymbol = createSymbol(SymbolFlags.TypeLiteral, "__type");
+        emptyTypeLiteralSymbol.members = createMap<Symbol>();
+        const emptyTypeLiteralType = createAnonymousType(emptyTypeLiteralSymbol, emptySymbols, emptyArray, emptyArray, undefined, undefined);
+
         const emptyGenericType = <GenericType><ObjectType>createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
         emptyGenericType.instantiations = createMap<TypeReference>();
 
@@ -145,6 +266,7 @@ namespace ts {
         anyFunctionType.flags |= TypeFlags.ContainsAnyFunctionType;
 
         const noConstraintType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
+        const circularConstraintType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
 
         const anySignature = createSignature(undefined, undefined, undefined, emptyArray, anyType, /*typePredicate*/ undefined, 0, /*hasRestParameter*/ false, /*hasLiteralTypes*/ false);
         const unknownSignature = createSignature(undefined, undefined, undefined, emptyArray, unknownType, /*typePredicate*/ undefined, 0, /*hasRestParameter*/ false, /*hasLiteralTypes*/ false);
@@ -152,20 +274,16 @@ namespace ts {
         const silentNeverSignature = createSignature(undefined, undefined, undefined, emptyArray, silentNeverType, /*typePredicate*/ undefined, 0, /*hasRestParameter*/ false, /*hasLiteralTypes*/ false);
 
         const enumNumberIndexInfo = createIndexInfo(stringType, /*isReadonly*/ true);
+        const jsObjectLiteralIndexInfo = createIndexInfo(anyType, /*isReadonly*/ false);
 
         const globals = createMap<Symbol>();
         /**
          * List of every ambient module with a "*" wildcard.
          * Unlike other ambient modules, these can't be stored in `globals` because symbol tables only deal with exact matches.
          * This is only used if there is no exact match.
-        */
+         */
         let patternAmbientModules: PatternAmbientModule[];
 
-        let getGlobalESSymbolConstructorSymbol: () => Symbol;
-
-        let getGlobalPromiseConstructorSymbol: () => Symbol;
-        let tryGetGlobalPromiseConstructorSymbol: () => Symbol;
-
         let globalObjectType: ObjectType;
         let globalFunctionType: ObjectType;
         let globalArrayType: GenericType;
@@ -174,32 +292,30 @@ namespace ts {
         let globalNumberType: ObjectType;
         let globalBooleanType: ObjectType;
         let globalRegExpType: ObjectType;
+        let globalThisType: GenericType;
         let anyArrayType: Type;
+        let autoArrayType: Type;
         let anyReadonlyArrayType: Type;
 
         // The library files are only loaded when the feature is used.
         // This allows users to just specify library files they want to used through --lib
         // and they will not get an error from not having unrelated library files
-        let getGlobalTemplateStringsArrayType: () => ObjectType;
-
-        let getGlobalESSymbolType: () => ObjectType;
-        let getGlobalIterableType: () => GenericType;
-        let getGlobalIteratorType: () => GenericType;
-        let getGlobalIterableIteratorType: () => GenericType;
-
-        let getGlobalClassDecoratorType: () => ObjectType;
-        let getGlobalParameterDecoratorType: () => ObjectType;
-        let getGlobalPropertyDecoratorType: () => ObjectType;
-        let getGlobalMethodDecoratorType: () => ObjectType;
-        let getGlobalTypedPropertyDescriptorType: () => ObjectType;
-        let getGlobalPromiseType: () => ObjectType;
-        let tryGetGlobalPromiseType: () => ObjectType;
-        let getGlobalPromiseLikeType: () => ObjectType;
-        let getInstantiatedGlobalPromiseLikeType: () => ObjectType;
-        let getGlobalPromiseConstructorLikeType: () => ObjectType;
-        let getGlobalThenableType: () => ObjectType;
-
-        let jsxElementClassType: Type;
+        let deferredGlobalESSymbolConstructorSymbol: Symbol;
+        let deferredGlobalESSymbolType: ObjectType;
+        let deferredGlobalTypedPropertyDescriptorType: GenericType;
+        let deferredGlobalPromiseType: GenericType;
+        let deferredGlobalPromiseConstructorSymbol: Symbol;
+        let deferredGlobalPromiseConstructorLikeType: ObjectType;
+        let deferredGlobalIterableType: GenericType;
+        let deferredGlobalIteratorType: GenericType;
+        let deferredGlobalIterableIteratorType: GenericType;
+        let deferredGlobalAsyncIterableType: GenericType;
+        let deferredGlobalAsyncIteratorType: GenericType;
+        let deferredGlobalAsyncIterableIteratorType: GenericType;
+        let deferredGlobalTemplateStringsArrayType: ObjectType;
+        let deferredJsxElementClassType: Type;
+        let deferredJsxElementType: Type;
+        let deferredJsxStatelessElementType: Type;
 
         let deferredNodes: Node[];
         let deferredUnusedIdentifierNodes: Node[];
@@ -208,13 +324,15 @@ namespace ts {
         let flowLoopCount = 0;
         let visitedFlowCount = 0;
 
-        const emptyStringType = getLiteralTypeForText(TypeFlags.StringLiteral, "");
-        const zeroType = getLiteralTypeForText(TypeFlags.NumberLiteral, "0");
+        const emptyStringType = getLiteralType("");
+        const zeroType = getLiteralType(0);
 
         const resolutionTargets: TypeSystemEntity[] = [];
         const resolutionResults: boolean[] = [];
         const resolutionPropertyNames: TypeSystemPropertyName[] = [];
 
+        let suggestionCount = 0;
+        const maximumSuggestionCount = 10;
         const mergedSymbols: Symbol[] = [];
         const symbolLinks: SymbolLinks[] = [];
         const nodeLinks: NodeLinks[] = [];
@@ -225,6 +343,7 @@ namespace ts {
         const visitedFlowNodes: FlowNode[] = [];
         const visitedFlowTypes: FlowType[] = [];
         const potentialThisCollisions: Node[] = [];
+        const potentialNewTargetCollisions: Node[] = [];
         const awaitedTypeStack: number[] = [];
 
         const diagnostics = createDiagnosticCollection();
@@ -247,7 +366,7 @@ namespace ts {
             TypeofNEHostObject = 1 << 13, // typeof x !== "xxx"
             EQUndefined = 1 << 14,        // x === undefined
             EQNull = 1 << 15,             // x === null
-            EQUndefinedOrNull = 1 << 16,  // x == undefined / x == null
+            EQUndefinedOrNull = 1 << 16,  // x === undefined / x === null
             NEUndefined = 1 << 17,        // x !== undefined
             NENull = 1 << 18,             // x !== null
             NEUndefinedOrNull = 1 << 19,  // x != undefined / x != null
@@ -259,7 +378,7 @@ namespace ts {
             // The presence of a particular fact means that the given test is true for some (and possibly all) values
             // of that kind of type.
             BaseStringStrictFacts = TypeofEQString | TypeofNENumber | TypeofNEBoolean | TypeofNESymbol | TypeofNEObject | TypeofNEFunction | TypeofNEHostObject | NEUndefined | NENull | NEUndefinedOrNull,
-            BaseStringFacts = BaseStringStrictFacts  | EQUndefined | EQNull | EQUndefinedOrNull | Falsy,
+            BaseStringFacts = BaseStringStrictFacts | EQUndefined | EQNull | EQUndefinedOrNull | Falsy,
             StringStrictFacts = BaseStringStrictFacts | Truthy | Falsy,
             StringFacts = BaseStringFacts | Truthy,
             EmptyStringStrictFacts = BaseStringStrictFacts | Falsy,
@@ -292,7 +411,7 @@ namespace ts {
             NullFacts = TypeofEQObject | TypeofNEString | TypeofNENumber | TypeofNEBoolean | TypeofNESymbol | TypeofNEFunction | TypeofNEHostObject | EQNull | EQUndefinedOrNull | NEUndefined | Falsy,
         }
 
-        const typeofEQFacts = createMap({
+        const typeofEQFacts = createMapFromTemplate({
             "string": TypeFacts.TypeofEQString,
             "number": TypeFacts.TypeofEQNumber,
             "boolean": TypeFacts.TypeofEQBoolean,
@@ -301,8 +420,7 @@ namespace ts {
             "object": TypeFacts.TypeofEQObject,
             "function": TypeFacts.TypeofEQFunction
         });
-
-        const typeofNEFacts = createMap({
+        const typeofNEFacts = createMapFromTemplate({
             "string": TypeFacts.TypeofNEString,
             "number": TypeFacts.TypeofNENumber,
             "boolean": TypeFacts.TypeofNEBoolean,
@@ -311,23 +429,31 @@ namespace ts {
             "object": TypeFacts.TypeofNEObject,
             "function": TypeFacts.TypeofNEFunction
         });
-
-        const typeofTypesByName = createMap<Type>({
+        const typeofTypesByName = createMapFromTemplate<Type>({
             "string": stringType,
             "number": numberType,
             "boolean": booleanType,
             "symbol": esSymbolType,
             "undefined": undefinedType
         });
+        const typeofType = createTypeofType();
+
+        let _jsxNamespace: string;
+        let _jsxFactoryEntity: EntityName;
+        let _jsxElementPropertiesName: string;
+        let _hasComputedJsxElementPropertiesName = false;
+        let _jsxElementChildrenPropertyName: string;
+        let _hasComputedJsxElementChildrenPropertyName = false;
 
-        let jsxElementType: ObjectType;
         /** Things we lazy load from the JSX namespace */
-        const jsxTypes = createMap<ObjectType>();
+        const jsxTypes = createMap<Type>();
+
         const JsxNames = {
             JSX: "JSX",
             IntrinsicElements: "IntrinsicElements",
             ElementClass: "ElementClass",
             ElementAttributesPropertyNameContainer: "ElementAttributesProperty",
+            ElementChildrenAttributeNameContainer: "ElementChildrenAttribute",
             Element: "Element",
             IntrinsicAttributes: "IntrinsicAttributes",
             IntrinsicClassAttributes: "IntrinsicClassAttributes"
@@ -351,13 +477,35 @@ namespace ts {
             ResolvedReturnType
         }
 
+        const enum CheckMode {
+            Normal = 0,                // Normal type checking
+            SkipContextSensitive = 1,  // Skip context sensitive function expressions
+            Inferential = 2,           // Inferential typing
+        }
+
         const builtinGlobals = createMap<Symbol>();
-        builtinGlobals[undefinedSymbol.name] = undefinedSymbol;
+        builtinGlobals.set(undefinedSymbol.name, undefinedSymbol);
 
         initializeTypeChecker();
 
         return checker;
 
+        function getJsxNamespace(): string {
+            if (!_jsxNamespace) {
+                _jsxNamespace = "React";
+                if (compilerOptions.jsxFactory) {
+                    _jsxFactoryEntity = parseIsolatedEntityName(compilerOptions.jsxFactory, languageVersion);
+                    if (_jsxFactoryEntity) {
+                        _jsxNamespace = getFirstIdentifier(_jsxFactoryEntity).text;
+                    }
+                }
+                else if (compilerOptions.reactNamespace) {
+                    _jsxNamespace = compilerOptions.reactNamespace;
+                }
+            }
+            return _jsxNamespace;
+        }
+
         function getEmitResolver(sourceFile: SourceFile, cancellationToken: CancellationToken) {
             // Ensure we have all the type information in place for this file so that all the
             // emitter questions of this resolver will return the right information.
@@ -365,16 +513,22 @@ namespace ts {
             return emitResolver;
         }
 
-        function error(location: Node, message: DiagnosticMessage, arg0?: any, arg1?: any, arg2?: any): void {
+        function error(location: Node, message: DiagnosticMessage, arg0?: string | number, arg1?: string | number, arg2?: string | number): void {
             const diagnostic = location
                 ? createDiagnosticForNode(location, message, arg0, arg1, arg2)
                 : createCompilerDiagnostic(message, arg0, arg1, arg2);
             diagnostics.add(diagnostic);
         }
 
-        function createSymbol(flags: SymbolFlags, name: string): Symbol {
+        function createSymbol(flags: SymbolFlags, name: string) {
             symbolCount++;
-            return new Symbol(flags, name);
+            const symbol = <TransientSymbol>(new Symbol(flags | SymbolFlags.Transient, name));
+            symbol.checkFlags = 0;
+            return symbol;
+        }
+
+        function isTransientSymbol(symbol: Symbol): symbol is TransientSymbol {
+            return (symbol.flags & SymbolFlags.Transient) !== 0;
         }
 
         function getExcludedSymbolFlags(flags: SymbolFlags): SymbolFlags {
@@ -407,7 +561,7 @@ namespace ts {
         }
 
         function cloneSymbol(symbol: Symbol): Symbol {
-            const result = createSymbol(symbol.flags | SymbolFlags.Merged, symbol.name);
+            const result = createSymbol(symbol.flags, symbol.name);
             result.declarations = symbol.declarations.slice(0);
             result.parent = symbol.parent;
             if (symbol.valueDeclaration) result.valueDeclaration = symbol.valueDeclaration;
@@ -431,9 +585,7 @@ namespace ts {
                     // other kinds of value declarations take precedence over modules
                     target.valueDeclaration = source.valueDeclaration;
                 }
-                forEach(source.declarations, node => {
-                    target.declarations.push(node);
-                });
+                addRange(target.declarations, source.declarations);
                 if (source.members) {
                     if (!target.members) target.members = createMap<Symbol>();
                     mergeSymbolTable(target.members, source.members);
@@ -444,31 +596,35 @@ namespace ts {
                 }
                 recordMergedSymbol(target, source);
             }
+            else if (target.flags & SymbolFlags.NamespaceModule) {
+                error(getNameOfDeclaration(source.declarations[0]), Diagnostics.Cannot_augment_module_0_with_value_exports_because_it_resolves_to_a_non_module_entity, symbolToString(target));
+            }
             else {
                 const message = target.flags & SymbolFlags.BlockScopedVariable || source.flags & SymbolFlags.BlockScopedVariable
                     ? Diagnostics.Cannot_redeclare_block_scoped_variable_0 : Diagnostics.Duplicate_identifier_0;
                 forEach(source.declarations, node => {
-                    error(node.name ? node.name : node, message, symbolToString(source));
+                    error(getNameOfDeclaration(node) || node, message, symbolToString(source));
                 });
                 forEach(target.declarations, node => {
-                    error(node.name ? node.name : node, message, symbolToString(source));
+                    error(getNameOfDeclaration(node) || node, message, symbolToString(source));
                 });
             }
         }
 
         function mergeSymbolTable(target: SymbolTable, source: SymbolTable) {
-            for (const id in source) {
-                let targetSymbol = target[id];
+            source.forEach((sourceSymbol, id) => {
+                let targetSymbol = target.get(id);
                 if (!targetSymbol) {
-                    target[id] = source[id];
+                    target.set(id, sourceSymbol);
                 }
                 else {
-                    if (!(targetSymbol.flags & SymbolFlags.Merged)) {
-                        target[id] = targetSymbol = cloneSymbol(targetSymbol);
+                    if (!(targetSymbol.flags & SymbolFlags.Transient)) {
+                        targetSymbol = cloneSymbol(targetSymbol);
+                        target.set(id, targetSymbol);
                     }
-                    mergeSymbol(targetSymbol, source[id]);
+                    mergeSymbol(targetSymbol, sourceSymbol);
                 }
-            }
+            });
         }
 
         function mergeModuleAugmentation(moduleName: LiteralExpression): void {
@@ -490,7 +646,7 @@ namespace ts {
                 const moduleNotFoundError = !isInAmbientContext(moduleName.parent.parent)
                     ? Diagnostics.Invalid_module_name_in_augmentation_module_0_cannot_be_found
                     : undefined;
-                let mainModule = resolveExternalModuleNameWorker(moduleName, moduleName, moduleNotFoundError);
+                let mainModule = resolveExternalModuleNameWorker(moduleName, moduleName, moduleNotFoundError, /*isForAugmentation*/ true);
                 if (!mainModule) {
                     return;
                 }
@@ -499,7 +655,7 @@ namespace ts {
                 if (mainModule.flags & SymbolFlags.Namespace) {
                     // if module symbol has already been merged - it is safe to use it.
                     // otherwise clone it
-                    mainModule = mainModule.flags & SymbolFlags.Merged ? mainModule : cloneSymbol(mainModule);
+                    mainModule = mainModule.flags & SymbolFlags.Transient ? mainModule : cloneSymbol(mainModule);
                     mergeSymbol(mainModule, moduleAugmentation.symbol);
                 }
                 else {
@@ -509,15 +665,16 @@ namespace ts {
         }
 
         function addToSymbolTable(target: SymbolTable, source: SymbolTable, message: DiagnosticMessage) {
-            for (const id in source) {
-                if (target[id]) {
+            source.forEach((sourceSymbol, id) => {
+                const targetSymbol = target.get(id);
+                if (targetSymbol) {
                     // Error on redeclarations
-                    forEach(target[id].declarations, addDeclarationDiagnostic(id, message));
+                    forEach(targetSymbol.declarations, addDeclarationDiagnostic(id, message));
                 }
                 else {
-                    target[id] = source[id];
+                    target.set(id, sourceSymbol);
                 }
-            }
+            });
 
             function addDeclarationDiagnostic(id: string, message: DiagnosticMessage) {
                 return (declaration: Declaration) => diagnostics.add(createDiagnosticForNode(declaration, message, id));
@@ -535,15 +692,19 @@ namespace ts {
             return nodeLinks[nodeId] || (nodeLinks[nodeId] = { flags: 0 });
         }
 
+        function getObjectFlags(type: Type): ObjectFlags {
+            return type.flags & TypeFlags.Object ? (<ObjectType>type).objectFlags : 0;
+        }
+
         function isGlobalSourceFile(node: Node) {
             return node.kind === SyntaxKind.SourceFile && !isExternalOrCommonJsModule(<SourceFile>node);
         }
 
         function getSymbol(symbols: SymbolTable, name: string, meaning: SymbolFlags): Symbol {
             if (meaning) {
-                const symbol = symbols[name];
+                const symbol = symbols.get(name);
                 if (symbol) {
-                    Debug.assert((symbol.flags & SymbolFlags.Instantiated) === 0, "Should never get an instantiated symbol here.");
+                    Debug.assert((getCheckFlags(symbol) & CheckFlags.Instantiated) === 0, "Should never get an instantiated symbol here.");
                     if (symbol.flags & meaning) {
                         return symbol;
                     }
@@ -584,25 +745,55 @@ namespace ts {
             const useFile = getSourceFileOfNode(usage);
             if (declarationFile !== useFile) {
                 if ((modulekind && (declarationFile.externalModuleIndicator || useFile.externalModuleIndicator)) ||
-                    (!compilerOptions.outFile && !compilerOptions.out)) {
-                    // nodes are in different files and order cannot be determines
+                    (!compilerOptions.outFile && !compilerOptions.out) ||
+                    isInTypeQuery(usage) ||
+                    isInAmbientContext(declaration)) {
+                    // nodes are in different files and order cannot be determined
+                    return true;
+                }
+                // declaration is after usage
+                // can be legal if usage is deferred (i.e. inside function or in initializer of instance property)
+                if (isUsedInFunctionOrInstanceProperty(usage, declaration)) {
                     return true;
                 }
-
                 const sourceFiles = host.getSourceFiles();
                 return indexOf(sourceFiles, declarationFile) <= indexOf(sourceFiles, useFile);
             }
 
             if (declaration.pos <= usage.pos) {
                 // declaration is before usage
-                // still might be illegal if usage is in the initializer of the variable declaration
-                return declaration.kind !== SyntaxKind.VariableDeclaration ||
-                    !isImmediatelyUsedInInitializerOfBlockScopedVariable(<VariableDeclaration>declaration, usage);
+                if (declaration.kind === SyntaxKind.BindingElement) {
+                    // still might be illegal if declaration and usage are both binding elements (eg var [a = b, b = b] = [1, 2])
+                    const errorBindingElement = getAncestor(usage, SyntaxKind.BindingElement) as BindingElement;
+                    if (errorBindingElement) {
+                        return findAncestor(errorBindingElement, isBindingElement) !== findAncestor(declaration, isBindingElement) ||
+                            declaration.pos < errorBindingElement.pos;
+                    }
+                    // or it might be illegal if usage happens before parent variable is declared (eg var [a] = a)
+                    return isBlockScopedNameDeclaredBeforeUse(getAncestor(declaration, SyntaxKind.VariableDeclaration) as Declaration, usage);
+                }
+                else if (declaration.kind === SyntaxKind.VariableDeclaration) {
+                    // still might be illegal if usage is in the initializer of the variable declaration (eg var a = a)
+                    return !isImmediatelyUsedInInitializerOfBlockScopedVariable(declaration as VariableDeclaration, usage);
+                }
+                return true;
+            }
+
+
+            // declaration is after usage, but it can still be legal if usage is deferred:
+            // 1. inside an export specifier
+            // 2. inside a function
+            // 3. inside an instance property initializer, a reference to a non-instance property
+            // 4. inside a static property initializer, a reference to a static method in the same class
+            // or if usage is in a type context:
+            // 1. inside a type query (typeof in type position)
+            if (usage.parent.kind === SyntaxKind.ExportSpecifier) {
+                // export specifiers do not use the variable, they only make it available for use
+                return true;
             }
 
-            // declaration is after usage
-            // can be legal if usage is deferred (i.e. inside function or in initializer of instance property)
-            return isUsedInFunctionOrNonStaticProperty(declaration, usage);
+            const container = getEnclosingBlockScopeContainer(declaration);
+            return isInTypeQuery(usage) || isUsedInFunctionOrInstanceProperty(usage, declaration, container);
 
             function isImmediatelyUsedInInitializerOfBlockScopedVariable(declaration: VariableDeclaration, usage: Node): boolean {
                 const container = getEnclosingBlockScopeContainer(declaration);
@@ -619,49 +810,62 @@ namespace ts {
                         break;
                 }
 
-                switch (declaration.parent.parent.kind) {
-                    case SyntaxKind.ForInStatement:
-                    case SyntaxKind.ForOfStatement:
-                        // ForIn/ForOf case - use site should not be used in expression part
-                        if (isSameScopeDescendentOf(usage, (<ForInStatement | ForOfStatement>declaration.parent.parent).expression, container)) {
-                            return true;
-                        }
-                }
-
-                return false;
+                // ForIn/ForOf case - use site should not be used in expression part
+                return isForInOrOfStatement(declaration.parent.parent) && isSameScopeDescendentOf(usage, declaration.parent.parent.expression, container);
             }
 
-            function isUsedInFunctionOrNonStaticProperty(declaration: Declaration, usage: Node): boolean {
-                const container = getEnclosingBlockScopeContainer(declaration);
-                let current = usage;
-                while (current) {
+            function isUsedInFunctionOrInstanceProperty(usage: Node, declaration: Node, container?: Node): boolean {
+                return !!findAncestor(usage, current => {
                     if (current === container) {
-                        return false;
+                        return "quit";
                     }
-
                     if (isFunctionLike(current)) {
                         return true;
                     }
 
-                    const initializerOfNonStaticProperty = current.parent &&
+                    const initializerOfProperty = current.parent &&
                         current.parent.kind === SyntaxKind.PropertyDeclaration &&
-                        (getModifierFlags(current.parent) & ModifierFlags.Static) === 0 &&
                         (<PropertyDeclaration>current.parent).initializer === current;
 
-                    if (initializerOfNonStaticProperty) {
-                        return true;
+                    if (initializerOfProperty) {
+                        if (getModifierFlags(current.parent) & ModifierFlags.Static) {
+                            if (declaration.kind === SyntaxKind.MethodDeclaration) {
+                                return true;
+                            }
+                        }
+                        else {
+                            const isDeclarationInstanceProperty = declaration.kind === SyntaxKind.PropertyDeclaration && !(getModifierFlags(declaration) & ModifierFlags.Static);
+                            if (!isDeclarationInstanceProperty || getContainingClass(usage) !== getContainingClass(declaration)) {
+                                return true;
+                            }
+                        }
                     }
-
-                    current = current.parent;
-                }
-                return false;
+                });
             }
         }
 
         // Resolve a given name for a given meaning at a given location. An error is reported if the name was not found and
         // the nameNotFoundMessage argument is not undefined. Returns the resolved symbol, or undefined if no symbol with
         // the given name can be found.
-        function resolveName(location: Node | undefined, name: string, meaning: SymbolFlags, nameNotFoundMessage: DiagnosticMessage, nameArg: string | Identifier): Symbol {
+        function resolveName(
+            location: Node | undefined,
+            name: string,
+            meaning: SymbolFlags,
+            nameNotFoundMessage: DiagnosticMessage | undefined,
+            nameArg: string | Identifier,
+            suggestedNameNotFoundMessage?: DiagnosticMessage): Symbol {
+            return resolveNameHelper(location, name, meaning, nameNotFoundMessage, nameArg, getSymbol, suggestedNameNotFoundMessage);
+        }
+
+        function resolveNameHelper(
+            location: Node | undefined,
+            name: string,
+            meaning: SymbolFlags,
+            nameNotFoundMessage: DiagnosticMessage,
+            nameArg: string | Identifier,
+            lookup: (symbols: SymbolTable, name: string, meaning: SymbolFlags) => Symbol,
+            suggestedNameNotFoundMessage?: DiagnosticMessage): Symbol {
+            const originalLocation = location; // needed for did-you-mean error reporting, which gathers candidates starting from the original location
             let result: Symbol;
             let lastLocation: Node;
             let propertyWithInvalidInitializer: Node;
@@ -672,7 +876,7 @@ namespace ts {
             loop: while (location) {
                 // Locals of a source file are not in scope (because they get merged into the global symbol table)
                 if (location.locals && !isGlobalSourceFile(location)) {
-                    if (result = getSymbol(location.locals, name, meaning)) {
+                    if (result = lookup(location.locals, name, meaning)) {
                         let useResult = true;
                         if (isFunctionLike(location) && lastLocation && lastLocation !== (<FunctionLikeDeclaration>location).body) {
                             // symbol lookup restrictions for function-like declarations
@@ -716,13 +920,14 @@ namespace ts {
                     case SyntaxKind.SourceFile:
                         if (!isExternalOrCommonJsModule(<SourceFile>location)) break;
                         isInExternalModule = true;
+                        // falls through
                     case SyntaxKind.ModuleDeclaration:
                         const moduleExports = getSymbolOfNode(location).exports;
                         if (location.kind === SyntaxKind.SourceFile || isAmbientModule(location)) {
 
                             // It's an external module. First see if the module has an export default and if the local
                             // name of that export default matches.
-                            if (result = moduleExports["default"]) {
+                            if (result = moduleExports.get("default")) {
                                 const localSymbol = getLocalSymbolForExportDefault(result);
                                 if (localSymbol && (result.flags & meaning) && localSymbol.name === name) {
                                     break loop;
@@ -741,19 +946,20 @@ namespace ts {
                             //     2. We check === SymbolFlags.Alias in order to check that the symbol is *purely*
                             //        an alias. If we used &, we'd be throwing out symbols that have non alias aspects,
                             //        which is not the desired behavior.
-                            if (moduleExports[name] &&
-                                moduleExports[name].flags === SymbolFlags.Alias &&
-                                getDeclarationOfKind(moduleExports[name], SyntaxKind.ExportSpecifier)) {
+                            const moduleExport = moduleExports.get(name);
+                            if (moduleExport &&
+                                moduleExport.flags === SymbolFlags.Alias &&
+                                getDeclarationOfKind(moduleExport, SyntaxKind.ExportSpecifier)) {
                                 break;
                             }
                         }
 
-                        if (result = getSymbol(moduleExports, name, meaning & SymbolFlags.ModuleMember)) {
+                        if (result = lookup(moduleExports, name, meaning & SymbolFlags.ModuleMember)) {
                             break loop;
                         }
                         break;
                     case SyntaxKind.EnumDeclaration:
-                        if (result = getSymbol(getSymbolOfNode(location).exports, name, meaning & SymbolFlags.EnumMember)) {
+                        if (result = lookup(getSymbolOfNode(location).exports, name, meaning & SymbolFlags.EnumMember)) {
                             break loop;
                         }
                         break;
@@ -768,7 +974,7 @@ namespace ts {
                         if (isClassLike(location.parent) && !(getModifierFlags(location) & ModifierFlags.Static)) {
                             const ctor = findConstructorDeclaration(<ClassLikeDeclaration>location.parent);
                             if (ctor && ctor.locals) {
-                                if (getSymbol(ctor.locals, name, meaning & SymbolFlags.Value)) {
+                                if (lookup(ctor.locals, name, meaning & SymbolFlags.Value)) {
                                     // Remember the property node, it will be used later to report appropriate error
                                     propertyWithInvalidInitializer = location;
                                 }
@@ -778,7 +984,12 @@ namespace ts {
                     case SyntaxKind.ClassDeclaration:
                     case SyntaxKind.ClassExpression:
                     case SyntaxKind.InterfaceDeclaration:
-                        if (result = getSymbol(getSymbolOfNode(location).members, name, meaning & SymbolFlags.Type)) {
+                        if (result = lookup(getSymbolOfNode(location).members, name, meaning & SymbolFlags.Type)) {
+                            if (!isTypeParameterSymbolDeclaredInContainer(result, location)) {
+                                // ignore type parameters not declared in this container
+                                result = undefined;
+                                break;
+                            }
                             if (lastLocation && getModifierFlags(lastLocation) & ModifierFlags.Static) {
                                 // TypeScript 1.0 spec (April 2014): 3.4.1
                                 // The scope of a type parameter extends over the entire declaration with which the type
@@ -809,7 +1020,7 @@ namespace ts {
                         grandparent = location.parent.parent;
                         if (isClassLike(grandparent) || grandparent.kind === SyntaxKind.InterfaceDeclaration) {
                             // A reference to this grandparent's type parameters would be an error
-                            if (result = getSymbol(getSymbolOfNode(grandparent).members, name, meaning & SymbolFlags.Type)) {
+                            if (result = lookup(getSymbolOfNode(grandparent).members, name, meaning & SymbolFlags.Type)) {
                                 error(errorLocation, Diagnostics.A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type);
                                 return undefined;
                             }
@@ -873,7 +1084,7 @@ namespace ts {
             }
 
             if (!result) {
-                result = getSymbol(globals, name, meaning);
+                result = lookup(globals, name, meaning);
             }
 
             if (!result) {
@@ -881,8 +1092,20 @@ namespace ts {
                     if (!errorLocation ||
                         !checkAndReportErrorForMissingPrefix(errorLocation, name, nameArg) &&
                         !checkAndReportErrorForExtendingInterface(errorLocation) &&
-                        !checkAndReportErrorForUsingTypeAsValue(errorLocation, name, meaning)) {
-                        error(errorLocation, nameNotFoundMessage, typeof nameArg === "string" ? nameArg : declarationNameToString(nameArg));
+                        !checkAndReportErrorForUsingTypeAsNamespace(errorLocation, name, meaning) &&
+                        !checkAndReportErrorForUsingTypeAsValue(errorLocation, name, meaning) &&
+                        !checkAndReportErrorForUsingNamespaceModuleAsValue(errorLocation, name, meaning))  {
+                        let suggestion: string | undefined;
+                        if (suggestedNameNotFoundMessage && suggestionCount < maximumSuggestionCount) {
+                            suggestion = getSuggestionForNonexistentSymbol(originalLocation, name, meaning);
+                            if (suggestion) {
+                                error(errorLocation, suggestedNameNotFoundMessage, typeof nameArg === "string" ? nameArg : declarationNameToString(nameArg), suggestion);
+                            }
+                        }
+                        if (!suggestion) {
+                            error(errorLocation, nameNotFoundMessage, typeof nameArg === "string" ? nameArg : declarationNameToString(nameArg));
+                        }
+                        suggestionCount++;
                     }
                 }
                 return undefined;
@@ -906,13 +1129,14 @@ namespace ts {
                 //              interface bar {}
                 //          }
                 //      const foo/*1*/: foo/*2*/.bar;
-                // The foo at /*1*/ and /*2*/ will share same symbol with two meaning
-                // block - scope variable and namespace module. However, only when we
+                // The foo at /*1*/ and /*2*/ will share same symbol with two meanings:
+                // block-scoped variable and namespace module. However, only when we
                 // try to resolve name in /*1*/ which is used in variable position,
-                // we want to check for block- scoped
-                if (meaning & SymbolFlags.BlockScopedVariable) {
+                // we want to check for block-scoped
+                if (meaning & SymbolFlags.BlockScopedVariable ||
+                    ((meaning & SymbolFlags.Class || meaning & SymbolFlags.Enum) && (meaning & SymbolFlags.Value) === SymbolFlags.Value)) {
                     const exportOrLocalSymbol = getExportSymbolOfValueSymbolIfExported(result);
-                    if (exportOrLocalSymbol.flags & SymbolFlags.BlockScopedVariable) {
+                    if (exportOrLocalSymbol.flags & SymbolFlags.BlockScopedVariable || exportOrLocalSymbol.flags & SymbolFlags.Class || exportOrLocalSymbol.flags & SymbolFlags.Enum) {
                         checkResolvedBlockScopedVariable(exportOrLocalSymbol, errorLocation);
                     }
                 }
@@ -921,19 +1145,29 @@ namespace ts {
                 if (result && isInExternalModule && (meaning & SymbolFlags.Value) === SymbolFlags.Value) {
                     const decls = result.declarations;
                     if (decls && decls.length === 1 && decls[0].kind === SyntaxKind.NamespaceExportDeclaration) {
-                        error(errorLocation, Diagnostics.Identifier_0_must_be_imported_from_a_module, name);
+                        error(errorLocation, Diagnostics._0_refers_to_a_UMD_global_but_the_current_file_is_a_module_Consider_adding_an_import_instead, name);
                     }
                 }
             }
             return result;
         }
 
+        function isTypeParameterSymbolDeclaredInContainer(symbol: Symbol, container: Node) {
+            for (const decl of symbol.declarations) {
+                if (decl.kind === SyntaxKind.TypeParameter && decl.parent === container) {
+                    return true;
+                }
+            }
+
+            return false;
+        }
+
         function checkAndReportErrorForMissingPrefix(errorLocation: Node, name: string, nameArg: string | Identifier): boolean {
             if ((errorLocation.kind === SyntaxKind.Identifier && (isTypeReferenceIdentifier(<Identifier>errorLocation)) || isInTypeQuery(errorLocation))) {
                 return false;
             }
 
-            const container = getThisContainer(errorLocation, /* includeArrowFunctions */ true);
+            const container = getThisContainer(errorLocation, /*includeArrowFunctions*/ true);
             let location = container;
             while (location) {
                 if (isClassLike(location.parent)) {
@@ -991,8 +1225,24 @@ namespace ts {
             }
         }
 
+        function checkAndReportErrorForUsingTypeAsNamespace(errorLocation: Node, name: string, meaning: SymbolFlags): boolean {
+            if (meaning === SymbolFlags.Namespace) {
+                const symbol = resolveSymbol(resolveName(errorLocation, name, SymbolFlags.Type & ~SymbolFlags.Value, /*nameNotFoundMessage*/undefined, /*nameArg*/ undefined));
+                if (symbol) {
+                    error(errorLocation, Diagnostics._0_only_refers_to_a_type_but_is_being_used_as_a_namespace_here, name);
+                    return true;
+                }
+            }
+
+            return false;
+        }
+
         function checkAndReportErrorForUsingTypeAsValue(errorLocation: Node, name: string, meaning: SymbolFlags): boolean {
             if (meaning & (SymbolFlags.Value & ~SymbolFlags.NamespaceModule)) {
+                if (name === "any" || name === "string" || name === "number" || name === "boolean" || name === "never") {
+                    error(errorLocation, Diagnostics._0_only_refers_to_a_type_but_is_being_used_as_a_value_here, name);
+                    return true;
+                }
                 const symbol = resolveSymbol(resolveName(errorLocation, name, SymbolFlags.Type & ~SymbolFlags.Value, /*nameNotFoundMessage*/undefined, /*nameArg*/ undefined));
                 if (symbol && !(symbol.flags & SymbolFlags.NamespaceModule)) {
                     error(errorLocation, Diagnostics._0_only_refers_to_a_type_but_is_being_used_as_a_value_here, name);
@@ -1002,15 +1252,41 @@ namespace ts {
             return false;
         }
 
+        function checkAndReportErrorForUsingNamespaceModuleAsValue(errorLocation: Node, name: string, meaning: SymbolFlags): boolean {
+            if (meaning & (SymbolFlags.Value & ~SymbolFlags.NamespaceModule & ~SymbolFlags.Type)) {
+                const symbol = resolveSymbol(resolveName(errorLocation, name, SymbolFlags.NamespaceModule & ~SymbolFlags.Value, /*nameNotFoundMessage*/undefined, /*nameArg*/ undefined));
+                if (symbol) {
+                    error(errorLocation, Diagnostics.Cannot_use_namespace_0_as_a_value, name);
+                    return true;
+                }
+            }
+            else if (meaning & (SymbolFlags.Type & ~SymbolFlags.NamespaceModule & ~SymbolFlags.Value)) {
+                const symbol = resolveSymbol(resolveName(errorLocation, name, SymbolFlags.NamespaceModule & ~SymbolFlags.Type, /*nameNotFoundMessage*/undefined, /*nameArg*/ undefined));
+                if (symbol) {
+                    error(errorLocation, Diagnostics.Cannot_use_namespace_0_as_a_type, name);
+                    return true;
+                }
+            }
+            return false;
+        }
+
         function checkResolvedBlockScopedVariable(result: Symbol, errorLocation: Node): void {
-            Debug.assert((result.flags & SymbolFlags.BlockScopedVariable) !== 0);
+            Debug.assert(!!(result.flags & SymbolFlags.BlockScopedVariable || result.flags & SymbolFlags.Class || result.flags & SymbolFlags.Enum));
             // Block-scoped variables cannot be used before their definition
-            const declaration = forEach(result.declarations, d => isBlockOrCatchScoped(d) ? d : undefined);
+            const declaration = forEach(result.declarations, d => isBlockOrCatchScoped(d) || isClassLike(d) || (d.kind === SyntaxKind.EnumDeclaration) ? d : undefined);
 
-            Debug.assert(declaration !== undefined, "Block-scoped variable declaration is undefined");
+            Debug.assert(declaration !== undefined, "Declaration to checkResolvedBlockScopedVariable is undefined");
 
-            if (!isInAmbientContext(declaration) && !isBlockScopedNameDeclaredBeforeUse(<Declaration>getAncestor(declaration, SyntaxKind.VariableDeclaration), errorLocation)) {
-                error(errorLocation, Diagnostics.Block_scoped_variable_0_used_before_its_declaration, declarationNameToString(declaration.name));
+            if (!isInAmbientContext(declaration) && !isBlockScopedNameDeclaredBeforeUse(declaration, errorLocation)) {
+                if (result.flags & SymbolFlags.BlockScopedVariable) {
+                    error(errorLocation, Diagnostics.Block_scoped_variable_0_used_before_its_declaration, declarationNameToString(getNameOfDeclaration(declaration)));
+                }
+                else if (result.flags & SymbolFlags.Class) {
+                    error(errorLocation, Diagnostics.Class_0_used_before_its_declaration, declarationNameToString(getNameOfDeclaration(declaration)));
+                }
+                else if (result.flags & SymbolFlags.RegularEnum) {
+                    error(errorLocation, Diagnostics.Enum_0_used_before_its_declaration, declarationNameToString(getNameOfDeclaration(declaration)));
+                }
             }
         }
 
@@ -1019,15 +1295,7 @@ namespace ts {
          * Return false if 'stopAt' node is reached or isFunctionLike(current) === true.
          */
         function isSameScopeDescendentOf(initial: Node, parent: Node, stopAt: Node): boolean {
-            if (!parent) {
-                return false;
-            }
-            for (let current = initial; current && current !== stopAt && !isFunctionLike(current); current = current.parent) {
-                if (current === parent) {
-                    return true;
-                }
-            }
-            return false;
+            return parent && !!findAncestor(initial, n => n === stopAt || isFunctionLike(n) ? "quit" : n === parent);
         }
 
         function getAnyImportSyntax(node: Node): AnyImportSyntax {
@@ -1036,47 +1304,49 @@ namespace ts {
                     return <ImportEqualsDeclaration>node;
                 }
 
-                while (node && node.kind !== SyntaxKind.ImportDeclaration) {
-                    node = node.parent;
-                }
-                return <ImportDeclaration>node;
+                return findAncestor(node, isImportDeclaration);
             }
         }
 
         function getDeclarationOfAliasSymbol(symbol: Symbol): Declaration | undefined {
-            return forEach(symbol.declarations, d => isAliasSymbolDeclaration(d) ? d : undefined);
+            return find<Declaration>(symbol.declarations, isAliasSymbolDeclaration);
         }
 
-        function getTargetOfImportEqualsDeclaration(node: ImportEqualsDeclaration): Symbol {
+        function getTargetOfImportEqualsDeclaration(node: ImportEqualsDeclaration, dontResolveAlias: boolean): Symbol {
             if (node.moduleReference.kind === SyntaxKind.ExternalModuleReference) {
                 return resolveExternalModuleSymbol(resolveExternalModuleName(node, getExternalModuleImportEqualsDeclarationExpression(node)));
             }
-            return getSymbolOfPartOfRightHandSideOfImportEquals(<EntityName>node.moduleReference, node);
+            return getSymbolOfPartOfRightHandSideOfImportEquals(<EntityName>node.moduleReference, dontResolveAlias);
         }
 
-        function getTargetOfImportClause(node: ImportClause): Symbol {
+        function getTargetOfImportClause(node: ImportClause, dontResolveAlias: boolean): Symbol {
             const moduleSymbol = resolveExternalModuleName(node, (<ImportDeclaration>node.parent).moduleSpecifier);
 
             if (moduleSymbol) {
-                const exportDefaultSymbol = isShorthandAmbientModuleSymbol(moduleSymbol) ?
-                    moduleSymbol :
-                    moduleSymbol.exports["export="] ?
-                        getPropertyOfType(getTypeOfSymbol(moduleSymbol.exports["export="]), "default") :
-                        resolveSymbol(moduleSymbol.exports["default"]);
+                let exportDefaultSymbol: Symbol;
+                if (isShorthandAmbientModuleSymbol(moduleSymbol)) {
+                    exportDefaultSymbol = moduleSymbol;
+                }
+                else {
+                    const exportValue = moduleSymbol.exports.get("export=");
+                    exportDefaultSymbol = exportValue
+                        ? getPropertyOfType(getTypeOfSymbol(exportValue), "default")
+                        : resolveSymbol(moduleSymbol.exports.get("default"), dontResolveAlias);
+                }
 
                 if (!exportDefaultSymbol && !allowSyntheticDefaultImports) {
                     error(node.name, Diagnostics.Module_0_has_no_default_export, symbolToString(moduleSymbol));
                 }
                 else if (!exportDefaultSymbol && allowSyntheticDefaultImports) {
-                    return resolveExternalModuleSymbol(moduleSymbol) || resolveSymbol(moduleSymbol);
+                    return resolveExternalModuleSymbol(moduleSymbol, dontResolveAlias) || resolveSymbol(moduleSymbol, dontResolveAlias);
                 }
                 return exportDefaultSymbol;
             }
         }
 
-        function getTargetOfNamespaceImport(node: NamespaceImport): Symbol {
+        function getTargetOfNamespaceImport(node: NamespaceImport, dontResolveAlias: boolean): Symbol {
             const moduleSpecifier = (<ImportDeclaration>node.parent.parent).moduleSpecifier;
-            return resolveESModuleSymbol(resolveExternalModuleName(node, moduleSpecifier), moduleSpecifier);
+            return resolveESModuleSymbol(resolveExternalModuleName(node, moduleSpecifier), moduleSpecifier, dontResolveAlias);
         }
 
         // This function creates a synthetic symbol that combines the value side of one symbol with the
@@ -1098,6 +1368,9 @@ namespace ts {
         // An 'import { Point } from "graphics"' needs to create a symbol that combines the value side 'Point'
         // property with the type/namespace side interface 'Point'.
         function combineValueAndTypeSymbols(valueSymbol: Symbol, typeSymbol: Symbol): Symbol {
+            if (valueSymbol === unknownSymbol && typeSymbol === unknownSymbol) {
+                return unknownSymbol;
+            }
             if (valueSymbol.flags & (SymbolFlags.Type | SymbolFlags.Namespace)) {
                 return valueSymbol;
             }
@@ -1110,12 +1383,9 @@ namespace ts {
             return result;
         }
 
-        function getExportOfModule(symbol: Symbol, name: string): Symbol {
+        function getExportOfModule(symbol: Symbol, name: string, dontResolveAlias: boolean): Symbol {
             if (symbol.flags & SymbolFlags.Module) {
-                const exportedSymbol = getExportsOfSymbol(symbol)[name];
-                if (exportedSymbol) {
-                    return resolveSymbol(exportedSymbol);
-                }
+                return resolveSymbol(getExportsOfSymbol(symbol).get(name), dontResolveAlias);
             }
         }
 
@@ -1128,9 +1398,9 @@ namespace ts {
             }
         }
 
-        function getExternalModuleMember(node: ImportDeclaration | ExportDeclaration, specifier: ImportOrExportSpecifier): Symbol {
+        function getExternalModuleMember(node: ImportDeclaration | ExportDeclaration, specifier: ImportOrExportSpecifier, dontResolveAlias?: boolean): Symbol {
             const moduleSymbol = resolveExternalModuleName(node, node.moduleSpecifier);
-            const targetSymbol = resolveESModuleSymbol(moduleSymbol, node.moduleSpecifier);
+            const targetSymbol = resolveESModuleSymbol(moduleSymbol, node.moduleSpecifier, dontResolveAlias);
             if (targetSymbol) {
                 const name = specifier.propertyName || specifier.name;
                 if (name.text) {
@@ -1140,18 +1410,18 @@ namespace ts {
 
                     let symbolFromVariable: Symbol;
                     // First check if module was specified with "export=". If so, get the member from the resolved type
-                    if (moduleSymbol && moduleSymbol.exports && moduleSymbol.exports["export="]) {
+                    if (moduleSymbol && moduleSymbol.exports && moduleSymbol.exports.get("export=")) {
                         symbolFromVariable = getPropertyOfType(getTypeOfSymbol(targetSymbol), name.text);
                     }
                     else {
                         symbolFromVariable = getPropertyOfVariable(targetSymbol, name.text);
                     }
                     // if symbolFromVariable is export - get its final target
-                    symbolFromVariable = resolveSymbol(symbolFromVariable);
-                    let symbolFromModule = getExportOfModule(targetSymbol, name.text);
+                    symbolFromVariable = resolveSymbol(symbolFromVariable, dontResolveAlias);
+                    let symbolFromModule = getExportOfModule(targetSymbol, name.text, dontResolveAlias);
                     // If the export member we're looking for is default, and there is no real default but allowSyntheticDefaultImports is on, return the entire module as the default
                     if (!symbolFromModule && allowSyntheticDefaultImports && name.text === "default") {
-                        symbolFromModule = resolveExternalModuleSymbol(moduleSymbol) || resolveSymbol(moduleSymbol);
+                        symbolFromModule = resolveExternalModuleSymbol(moduleSymbol, dontResolveAlias) || resolveSymbol(moduleSymbol, dontResolveAlias);
                     }
                     const symbol = symbolFromModule && symbolFromVariable ?
                         combineValueAndTypeSymbols(symbolFromVariable, symbolFromModule) :
@@ -1164,45 +1434,53 @@ namespace ts {
             }
         }
 
-        function getTargetOfImportSpecifier(node: ImportSpecifier): Symbol {
-            return getExternalModuleMember(<ImportDeclaration>node.parent.parent.parent, node);
+        function getTargetOfImportSpecifier(node: ImportSpecifier, dontResolveAlias: boolean): Symbol {
+            return getExternalModuleMember(<ImportDeclaration>node.parent.parent.parent, node, dontResolveAlias);
         }
 
-        function getTargetOfNamespaceExportDeclaration(node: NamespaceExportDeclaration): Symbol {
-            return resolveExternalModuleSymbol(node.parent.symbol);
+        function getTargetOfNamespaceExportDeclaration(node: NamespaceExportDeclaration, dontResolveAlias: boolean): Symbol {
+            return resolveExternalModuleSymbol(node.parent.symbol, dontResolveAlias);
         }
 
-        function getTargetOfExportSpecifier(node: ExportSpecifier): Symbol {
-            return (<ExportDeclaration>node.parent.parent).moduleSpecifier ?
-                getExternalModuleMember(<ExportDeclaration>node.parent.parent, node) :
-                resolveEntityName(node.propertyName || node.name, SymbolFlags.Value | SymbolFlags.Type | SymbolFlags.Namespace);
+        function getTargetOfExportSpecifier(node: ExportSpecifier, meaning: SymbolFlags, dontResolveAlias?: boolean) {
+            return node.parent.parent.moduleSpecifier ?
+                getExternalModuleMember(node.parent.parent, node, dontResolveAlias) :
+                resolveEntityName(node.propertyName || node.name, meaning, /*ignoreErrors*/ false, dontResolveAlias);
         }
 
-        function getTargetOfExportAssignment(node: ExportAssignment): Symbol {
-            return resolveEntityName(<EntityNameExpression>node.expression, SymbolFlags.Value | SymbolFlags.Type | SymbolFlags.Namespace);
+        function getTargetOfExportAssignment(node: ExportAssignment, dontResolveAlias: boolean): Symbol {
+            return resolveEntityName(<EntityNameExpression>node.expression, SymbolFlags.Value | SymbolFlags.Type | SymbolFlags.Namespace, /*ignoreErrors*/ false, dontResolveAlias);
         }
 
-        function getTargetOfAliasDeclaration(node: Declaration): Symbol {
+        function getTargetOfAliasDeclaration(node: Declaration, dontRecursivelyResolve?: boolean): Symbol {
             switch (node.kind) {
                 case SyntaxKind.ImportEqualsDeclaration:
-                    return getTargetOfImportEqualsDeclaration(<ImportEqualsDeclaration>node);
+                    return getTargetOfImportEqualsDeclaration(<ImportEqualsDeclaration>node, dontRecursivelyResolve);
                 case SyntaxKind.ImportClause:
-                    return getTargetOfImportClause(<ImportClause>node);
+                    return getTargetOfImportClause(<ImportClause>node, dontRecursivelyResolve);
                 case SyntaxKind.NamespaceImport:
-                    return getTargetOfNamespaceImport(<NamespaceImport>node);
+                    return getTargetOfNamespaceImport(<NamespaceImport>node, dontRecursivelyResolve);
                 case SyntaxKind.ImportSpecifier:
-                    return getTargetOfImportSpecifier(<ImportSpecifier>node);
+                    return getTargetOfImportSpecifier(<ImportSpecifier>node, dontRecursivelyResolve);
                 case SyntaxKind.ExportSpecifier:
-                    return getTargetOfExportSpecifier(<ExportSpecifier>node);
+                    return getTargetOfExportSpecifier(<ExportSpecifier>node, SymbolFlags.Value | SymbolFlags.Type | SymbolFlags.Namespace, dontRecursivelyResolve);
                 case SyntaxKind.ExportAssignment:
-                    return getTargetOfExportAssignment(<ExportAssignment>node);
+                    return getTargetOfExportAssignment(<ExportAssignment>node, dontRecursivelyResolve);
                 case SyntaxKind.NamespaceExportDeclaration:
-                    return getTargetOfNamespaceExportDeclaration(<NamespaceExportDeclaration>node);
+                    return getTargetOfNamespaceExportDeclaration(<NamespaceExportDeclaration>node, dontRecursivelyResolve);
             }
         }
 
-        function resolveSymbol(symbol: Symbol): Symbol {
-            return symbol && symbol.flags & SymbolFlags.Alias && !(symbol.flags & (SymbolFlags.Value | SymbolFlags.Type | SymbolFlags.Namespace)) ? resolveAlias(symbol) : symbol;
+        /**
+         * Indicates that a symbol is an alias that does not merge with a local declaration.
+         */
+        function isNonLocalAlias(symbol: Symbol, excludes = SymbolFlags.Value | SymbolFlags.Type | SymbolFlags.Namespace) {
+            return symbol && (symbol.flags & (SymbolFlags.Alias | excludes)) === SymbolFlags.Alias;
+        }
+
+        function resolveSymbol(symbol: Symbol, dontResolveAlias?: boolean): Symbol {
+            const shouldResolve = !dontResolveAlias && isNonLocalAlias(symbol);
+            return shouldResolve ? resolveAlias(symbol) : symbol;
         }
 
         function resolveAlias(symbol: Symbol): Symbol {
@@ -1264,7 +1542,7 @@ namespace ts {
         }
 
         // This function is only for imports with entity names
-        function getSymbolOfPartOfRightHandSideOfImportEquals(entityName: EntityName, importDeclaration: ImportEqualsDeclaration, dontResolveAlias?: boolean): Symbol {
+        function getSymbolOfPartOfRightHandSideOfImportEquals(entityName: EntityName, dontResolveAlias?: boolean): Symbol {
             // There are three things we might try to look for. In the following examples,
             // the search term is enclosed in |...|:
             //
@@ -1290,7 +1568,9 @@ namespace ts {
             return symbol.parent ? getFullyQualifiedName(symbol.parent) + "." + symbolToString(symbol) : symbolToString(symbol);
         }
 
-        // Resolves a qualified name and any involved aliases
+        /**
+         * Resolves a qualified name and any involved aliases.
+         */
         function resolveEntityName(name: EntityNameOrEntityNameExpression, meaning: SymbolFlags, ignoreErrors?: boolean, dontResolveAlias?: boolean, location?: Node): Symbol | undefined {
             if (nodeIsMissing(name)) {
                 return undefined;
@@ -1306,9 +1586,23 @@ namespace ts {
                 }
             }
             else if (name.kind === SyntaxKind.QualifiedName || name.kind === SyntaxKind.PropertyAccessExpression) {
-                const left = name.kind === SyntaxKind.QualifiedName ? (<QualifiedName>name).left : (<PropertyAccessEntityNameExpression>name).expression;
-                const right = name.kind === SyntaxKind.QualifiedName ? (<QualifiedName>name).right : (<PropertyAccessExpression>name).name;
+                let left: EntityNameOrEntityNameExpression;
 
+                if (name.kind === SyntaxKind.QualifiedName) {
+                    left = (<QualifiedName>name).left;
+                }
+                else if (name.kind === SyntaxKind.PropertyAccessExpression &&
+                    (name.expression.kind === SyntaxKind.ParenthesizedExpression || isEntityNameExpression(name.expression))) {
+                    left = name.expression;
+                }
+                else {
+                    // If the expression in property-access expression is not entity-name or parenthsizedExpression (e.g. it is a call expression), it won't be able to successfully resolve the name.
+                    // This is the case when we are trying to do any language service operation in heritage clauses. By return undefined, the getSymbolOfEntityNameOrPropertyAccessExpression
+                    // will attempt to checkPropertyAccessExpression to resolve symbol.
+                    // i.e class C extends foo()./*do language service operation here*/B {}
+                    return undefined;
+                }
+                const right = name.kind === SyntaxKind.QualifiedName ? name.right : name.name;
                 const namespace = resolveEntityName(left, SymbolFlags.Namespace, ignoreErrors, /*dontResolveAlias*/ false, location);
                 if (!namespace || nodeIsMissing(right)) {
                     return undefined;
@@ -1324,10 +1618,19 @@ namespace ts {
                     return undefined;
                 }
             }
+            else if (name.kind === SyntaxKind.ParenthesizedExpression) {
+                // If the expression in parenthesizedExpression is not an entity-name (e.g. it is a call expression), it won't be able to successfully resolve the name.
+                // This is the case when we are trying to do any language service operation in heritage clauses.
+                // By return undefined, the getSymbolOfEntityNameOrPropertyAccessExpression will attempt to checkPropertyAccessExpression to resolve symbol.
+                // i.e class C extends foo()./*do language service operation here*/B {}
+                return isEntityNameExpression(name.expression) ?
+                    resolveEntityName(name.expression as EntityNameOrEntityNameExpression, meaning, ignoreErrors, dontResolveAlias, location) :
+                    undefined;
+            }
             else {
                 Debug.fail("Unknown entity name kind.");
             }
-            Debug.assert((symbol.flags & SymbolFlags.Instantiated) === 0, "Should never get an instantiated symbol here.");
+            Debug.assert((getCheckFlags(symbol) & CheckFlags.Instantiated) === 0, "Should never get an instantiated symbol here.");
             return (symbol.flags & meaning) || dontResolveAlias ? symbol : resolveAlias(symbol);
         }
 
@@ -1335,16 +1638,16 @@ namespace ts {
             return resolveExternalModuleNameWorker(location, moduleReferenceExpression, Diagnostics.Cannot_find_module_0);
         }
 
-        function resolveExternalModuleNameWorker(location: Node, moduleReferenceExpression: Expression, moduleNotFoundError: DiagnosticMessage): Symbol {
-            if (moduleReferenceExpression.kind !== SyntaxKind.StringLiteral) {
+        function resolveExternalModuleNameWorker(location: Node, moduleReferenceExpression: Expression, moduleNotFoundError: DiagnosticMessage, isForAugmentation = false): Symbol {
+            if (moduleReferenceExpression.kind !== SyntaxKind.StringLiteral && moduleReferenceExpression.kind !== SyntaxKind.NoSubstitutionTemplateLiteral) {
                 return;
             }
 
             const moduleReferenceLiteral = <LiteralExpression>moduleReferenceExpression;
-            return resolveExternalModule(location, moduleReferenceLiteral.text, moduleNotFoundError, moduleReferenceLiteral);
+            return resolveExternalModule(location, moduleReferenceLiteral.text, moduleNotFoundError, moduleReferenceLiteral, isForAugmentation);
         }
 
-        function resolveExternalModule(location: Node, moduleReference: string, moduleNotFoundError: DiagnosticMessage, errorNode: Node): Symbol {
+        function resolveExternalModule(location: Node, moduleReference: string, moduleNotFoundError: DiagnosticMessage, errorNode: Node, isForAugmentation = false): Symbol {
             // Module names are escaped in our symbol table.  However, string literal values aren't.
             // Escape the name in the "require(...)" clause to ensure we find the right symbol.
             const moduleName = escapeIdentifier(moduleReference);
@@ -1353,17 +1656,20 @@ namespace ts {
                 return;
             }
 
-            const isRelative = isExternalModuleNameRelative(moduleName);
-            if (!isRelative) {
-                const symbol = getSymbol(globals, '"' + moduleName + '"', SymbolFlags.ValueModule);
-                if (symbol) {
-                    // merged symbol is module declaration symbol combined with all augmentations
-                    return getMergedSymbol(symbol);
-                }
+            if (startsWith(moduleReference, "@types/")) {
+                const diag = Diagnostics.Cannot_import_type_declaration_files_Consider_importing_0_instead_of_1;
+                const withoutAtTypePrefix = removePrefix(moduleReference, "@types/");
+                error(errorNode, diag, withoutAtTypePrefix, moduleReference);
             }
 
+            const ambientModule = tryFindAmbientModule(moduleName, /*withAugmentations*/ true);
+            if (ambientModule) {
+                return ambientModule;
+            }
+            const isRelative = isExternalModuleNameRelative(moduleName);
             const resolvedModule = getResolvedModule(getSourceFileOfNode(location), moduleReference);
-            const sourceFile = resolvedModule && host.getSourceFile(resolvedModule.resolvedFileName);
+            const resolutionDiagnostic = resolvedModule && getResolutionDiagnostic(compilerOptions, resolvedModule);
+            const sourceFile = resolvedModule && !resolutionDiagnostic && host.getSourceFile(resolvedModule.resolvedFileName);
             if (sourceFile) {
                 if (sourceFile.symbol) {
                     // merged symbol is module declaration symbol combined with all augmentations
@@ -1383,15 +1689,40 @@ namespace ts {
                 }
             }
 
+            // May be an untyped module. If so, ignore resolutionDiagnostic.
+            if (!isRelative && resolvedModule && !extensionIsTypeScript(resolvedModule.extension)) {
+                if (isForAugmentation) {
+                    const diag = Diagnostics.Invalid_module_name_in_augmentation_Module_0_resolves_to_an_untyped_module_at_1_which_cannot_be_augmented;
+                    error(errorNode, diag, moduleReference, resolvedModule.resolvedFileName);
+                }
+                else if (noImplicitAny && moduleNotFoundError) {
+                    let errorInfo = chainDiagnosticMessages(/*details*/ undefined,
+                        Diagnostics.Try_npm_install_types_Slash_0_if_it_exists_or_add_a_new_declaration_d_ts_file_containing_declare_module_0,
+                        moduleReference);
+                    errorInfo = chainDiagnosticMessages(errorInfo,
+                        Diagnostics.Could_not_find_a_declaration_file_for_module_0_1_implicitly_has_an_any_type,
+                        moduleReference,
+                        resolvedModule.resolvedFileName);
+                    diagnostics.add(createDiagnosticForNodeFromMessageChain(errorNode, errorInfo));
+                }
+                // Failed imports and untyped modules are both treated in an untyped manner; only difference is whether we give a diagnostic first.
+                return undefined;
+            }
+
             if (moduleNotFoundError) {
                 // report errors only if it was requested
-                const tsExtension = tryExtractTypeScriptExtension(moduleName);
-                if (tsExtension) {
-                    const diag = Diagnostics.An_import_path_cannot_end_with_a_0_extension_Consider_importing_1_instead;
-                    error(errorNode, diag, tsExtension, removeExtension(moduleName, tsExtension));
+                if (resolutionDiagnostic) {
+                    error(errorNode, resolutionDiagnostic, moduleName, resolvedModule.resolvedFileName);
                 }
                 else {
-                    error(errorNode, moduleNotFoundError, moduleName);
+                    const tsExtension = tryExtractTypeScriptExtension(moduleName);
+                    if (tsExtension) {
+                        const diag = Diagnostics.An_import_path_cannot_end_with_a_0_extension_Consider_importing_1_instead;
+                        error(errorNode, diag, tsExtension, removeExtension(moduleName, tsExtension));
+                    }
+                    else {
+                        error(errorNode, moduleNotFoundError, moduleName);
+                    }
                 }
             }
             return undefined;
@@ -1399,30 +1730,45 @@ namespace ts {
 
         // An external module with an 'export =' declaration resolves to the target of the 'export =' declaration,
         // and an external module with no 'export =' declaration resolves to the module itself.
-        function resolveExternalModuleSymbol(moduleSymbol: Symbol): Symbol {
-            return moduleSymbol && getMergedSymbol(resolveSymbol(moduleSymbol.exports["export="])) || moduleSymbol;
+        function resolveExternalModuleSymbol(moduleSymbol: Symbol, dontResolveAlias?: boolean): Symbol {
+            return moduleSymbol && getMergedSymbol(resolveSymbol(moduleSymbol.exports.get("export="), dontResolveAlias)) || moduleSymbol;
         }
 
         // An external module with an 'export =' declaration may be referenced as an ES6 module provided the 'export ='
         // references a symbol that is at least declared as a module or a variable. The target of the 'export =' may
         // combine other declarations with the module or variable (e.g. a class/module, function/module, interface/variable).
-        function resolveESModuleSymbol(moduleSymbol: Symbol, moduleReferenceExpression: Expression): Symbol {
-            let symbol = resolveExternalModuleSymbol(moduleSymbol);
-            if (symbol && !(symbol.flags & (SymbolFlags.Module | SymbolFlags.Variable))) {
+        function resolveESModuleSymbol(moduleSymbol: Symbol, moduleReferenceExpression: Expression, dontResolveAlias: boolean): Symbol {
+            const symbol = resolveExternalModuleSymbol(moduleSymbol, dontResolveAlias);
+            if (!dontResolveAlias && symbol && !(symbol.flags & (SymbolFlags.Module | SymbolFlags.Variable))) {
                 error(moduleReferenceExpression, Diagnostics.Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct, symbolToString(moduleSymbol));
-                symbol = undefined;
             }
             return symbol;
         }
 
         function hasExportAssignmentSymbol(moduleSymbol: Symbol): boolean {
-            return moduleSymbol.exports["export="] !== undefined;
+            return moduleSymbol.exports.get("export=") !== undefined;
         }
 
         function getExportsOfModuleAsArray(moduleSymbol: Symbol): Symbol[] {
             return symbolsToArray(getExportsOfModule(moduleSymbol));
         }
 
+        function getExportsAndPropertiesOfModule(moduleSymbol: Symbol): Symbol[] {
+            const exports = getExportsOfModuleAsArray(moduleSymbol);
+            const exportEquals = resolveExternalModuleSymbol(moduleSymbol);
+            if (exportEquals !== moduleSymbol) {
+                addRange(exports, getPropertiesOfType(getTypeOfSymbol(exportEquals)));
+            }
+            return exports;
+        }
+
+        function tryGetMemberInModuleExports(memberName: string, moduleSymbol: Symbol): Symbol | undefined {
+            const symbolTable = getExportsOfModule(moduleSymbol);
+            if (symbolTable) {
+                return symbolTable.get(memberName);
+            }
+        }
+
         function getExportsOfSymbol(symbol: Symbol): SymbolTable {
             return symbol.flags & SymbolFlags.Module ? getExportsOfModule(symbol) : symbol.exports || emptySymbols;
         }
@@ -1442,28 +1788,36 @@ namespace ts {
          * Not passing `lookupTable` and `exportNode` disables this collection, and just extends the tables
          */
         function extendExportSymbols(target: SymbolTable, source: SymbolTable, lookupTable?: Map<ExportCollisionTracker>, exportNode?: ExportDeclaration) {
-            for (const id in source) {
-                if (id !== "default" && !target[id]) {
-                    target[id] = source[id];
+            source && source.forEach((sourceSymbol, id) => {
+                if (id === "default") return;
+
+                const targetSymbol = target.get(id);
+                if (!targetSymbol) {
+                    target.set(id, sourceSymbol);
                     if (lookupTable && exportNode) {
-                        lookupTable[id] = {
+                        lookupTable.set(id, {
                             specifierText: getTextOfNode(exportNode.moduleSpecifier)
-                        } as ExportCollisionTracker;
+                        } as ExportCollisionTracker);
                     }
                 }
-                else if (lookupTable && exportNode && id !== "default" && target[id] && resolveSymbol(target[id]) !== resolveSymbol(source[id])) {
-                    if (!lookupTable[id].exportsWithDuplicate) {
-                        lookupTable[id].exportsWithDuplicate = [exportNode];
+                else if (lookupTable && exportNode && targetSymbol && resolveSymbol(targetSymbol) !== resolveSymbol(sourceSymbol)) {
+                    const collisionTracker = lookupTable.get(id);
+                    if (!collisionTracker.exportsWithDuplicate) {
+                        collisionTracker.exportsWithDuplicate = [exportNode];
                     }
                     else {
-                        lookupTable[id].exportsWithDuplicate.push(exportNode);
+                        collisionTracker.exportsWithDuplicate.push(exportNode);
                     }
                 }
-            }
+            });
         }
 
         function getExportsForModule(moduleSymbol: Symbol): SymbolTable {
             const visitedSymbols: Symbol[] = [];
+
+            // A module defined by an 'export=' consists on one export that needs to be resolved
+            moduleSymbol = resolveExternalModuleSymbol(moduleSymbol);
+
             return visit(moduleSymbol) || moduleSymbol.exports;
 
             // The ES6 spec permits export * declarations in a module to circularly reference the module itself. For example,
@@ -1475,7 +1829,7 @@ namespace ts {
                 visitedSymbols.push(symbol);
                 const symbols = cloneMap(symbol.exports);
                 // All export * declarations are collected in an __export symbol by the binder
-                const exportStars = symbol.exports["__export"];
+                const exportStars = symbol.exports.get("__export");
                 if (exportStars) {
                     const nestedSymbols = createMap<Symbol>();
                     const lookupTable = createMap<ExportCollisionTracker>();
@@ -1489,21 +1843,20 @@ namespace ts {
                             node as ExportDeclaration
                         );
                     }
-                    for (const id in lookupTable) {
-                        const { exportsWithDuplicate } = lookupTable[id];
+                    lookupTable.forEach(({ exportsWithDuplicate }, id) => {
                         // It's not an error if the file with multiple `export *`s with duplicate names exports a member with that name itself
-                        if (id === "export=" || !(exportsWithDuplicate && exportsWithDuplicate.length) || symbols[id]) {
-                            continue;
+                        if (id === "export=" || !(exportsWithDuplicate && exportsWithDuplicate.length) || symbols.has(id)) {
+                            return;
                         }
                         for (const node of exportsWithDuplicate) {
                             diagnostics.add(createDiagnosticForNode(
                                 node,
                                 Diagnostics.Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambiguity,
-                                lookupTable[id].specifierText,
+                                lookupTable.get(id).specifierText,
                                 id
                             ));
                         }
-                    }
+                    });
                     extendExportSymbols(symbols, nestedSymbols);
                 }
                 return symbols;
@@ -1530,23 +1883,7 @@ namespace ts {
         }
 
         function symbolIsValue(symbol: Symbol): boolean {
-            // If it is an instantiated symbol, then it is a value if the symbol it is an
-            // instantiation of is a value.
-            if (symbol.flags & SymbolFlags.Instantiated) {
-                return symbolIsValue(getSymbolLinks(symbol).target);
-            }
-
-            // If the symbol has the value flag, it is trivially a value.
-            if (symbol.flags & SymbolFlags.Value) {
-                return true;
-            }
-
-            // If it is an alias, then it is a value if the symbol it resolves to is a value.
-            if (symbol.flags & SymbolFlags.Alias) {
-                return (resolveAlias(symbol).flags & SymbolFlags.Value) !== 0;
-            }
-
-            return false;
+            return !!(symbol.flags & SymbolFlags.Value || symbol.flags & SymbolFlags.Alias && resolveAlias(symbol).flags & SymbolFlags.Value);
         }
 
         function findConstructorDeclaration(node: ClassLikeDeclaration): ConstructorDeclaration {
@@ -1578,12 +1915,17 @@ namespace ts {
             return type;
         }
 
-        function createObjectType(kind: TypeFlags, symbol?: Symbol): ObjectType {
-            const type = <ObjectType>createType(kind);
+        function createObjectType(objectFlags: ObjectFlags, symbol?: Symbol): ObjectType {
+            const type = <ObjectType>createType(TypeFlags.Object);
+            type.objectFlags = objectFlags;
             type.symbol = symbol;
             return type;
         }
 
+        function createTypeofType() {
+            return getUnionType(convertToArray(typeofEQFacts.keys(), getLiteralType));
+        }
+
         // A reserved member name starts with two underscores, but the third character cannot be an underscore
         // or the @ symbol. A third underscore indicates an escaped form of an identifer that started
         // with at least two underscores. The @ character indicates that the name is denoted by a well known ES
@@ -1597,19 +1939,18 @@ namespace ts {
 
         function getNamedMembers(members: SymbolTable): Symbol[] {
             let result: Symbol[];
-            for (const id in members) {
+            members.forEach((symbol, id) => {
                 if (!isReservedMemberName(id)) {
                     if (!result) result = [];
-                    const symbol = members[id];
                     if (symbolIsValue(symbol)) {
                         result.push(symbol);
                     }
                 }
-            }
+            });
             return result || emptyArray;
         }
 
-        function setObjectTypeMembers(type: ObjectType, members: SymbolTable, callSignatures: Signature[], constructSignatures: Signature[], stringIndexInfo: IndexInfo, numberIndexInfo: IndexInfo): ResolvedType {
+        function setStructuredTypeMembers(type: StructuredType, members: SymbolTable, callSignatures: Signature[], constructSignatures: Signature[], stringIndexInfo: IndexInfo, numberIndexInfo: IndexInfo): ResolvedType {
             (<ResolvedType>type).members = members;
             (<ResolvedType>type).properties = getNamedMembers(members);
             (<ResolvedType>type).callSignatures = callSignatures;
@@ -1620,7 +1961,7 @@ namespace ts {
         }
 
         function createAnonymousType(symbol: Symbol, members: SymbolTable, callSignatures: Signature[], constructSignatures: Signature[], stringIndexInfo: IndexInfo, numberIndexInfo: IndexInfo): ResolvedType {
-            return setObjectTypeMembers(createObjectType(TypeFlags.Anonymous, symbol),
+            return setStructuredTypeMembers(createObjectType(ObjectFlags.Anonymous, symbol),
                 members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
         }
 
@@ -1638,6 +1979,7 @@ namespace ts {
                         if (!isExternalOrCommonJsModule(<SourceFile>location)) {
                             break;
                         }
+                        // falls through
                     case SyntaxKind.ModuleDeclaration:
                         if (result = callback(getSymbolOfNode(location).exports)) {
                             return result;
@@ -1655,7 +1997,19 @@ namespace ts {
         }
 
         function getAccessibleSymbolChain(symbol: Symbol, enclosingDeclaration: Node, meaning: SymbolFlags, useOnlyExternalAliasing: boolean): Symbol[] {
-            function getAccessibleSymbolChainFromSymbolTable(symbols: SymbolTable): Symbol[] {
+            function getAccessibleSymbolChainFromSymbolTable(symbols: SymbolTable) {
+                return getAccessibleSymbolChainFromSymbolTableWorker(symbols, []);
+            }
+
+            function getAccessibleSymbolChainFromSymbolTableWorker(symbols: SymbolTable, visitedSymbolTables: SymbolTable[]): Symbol[] {
+                if (contains(visitedSymbolTables, symbols)) {
+                    return undefined;
+                }
+                visitedSymbolTables.push(symbols);
+                const result = trySymbolTable(symbols);
+                visitedSymbolTables.pop();
+                return result;
+
                 function canQualifySymbol(symbolFromSymbolTable: Symbol, meaning: SymbolFlags) {
                     // If the symbol is equivalent and doesn't need further qualification, this symbol is accessible
                     if (!needsQualification(symbolFromSymbolTable, enclosingDeclaration, meaning)) {
@@ -1677,34 +2031,36 @@ namespace ts {
                     }
                 }
 
-                // If symbol is directly available by its name in the symbol table
-                if (isAccessible(symbols[symbol.name])) {
-                    return [symbol];
-                }
+                function trySymbolTable(symbols: SymbolTable) {
+                    // If symbol is directly available by its name in the symbol table
+                    if (isAccessible(symbols.get(symbol.name))) {
+                        return [symbol];
+                    }
 
-                // Check if symbol is any of the alias
-                return forEachProperty(symbols, symbolFromSymbolTable => {
-                    if (symbolFromSymbolTable.flags & SymbolFlags.Alias
-                        && symbolFromSymbolTable.name !== "export="
-                        && !getDeclarationOfKind(symbolFromSymbolTable, SyntaxKind.ExportSpecifier)) {
-                        if (!useOnlyExternalAliasing || // We can use any type of alias to get the name
-                            // Is this external alias, then use it to name
-                            ts.forEach(symbolFromSymbolTable.declarations, isExternalModuleImportEqualsDeclaration)) {
+                    // Check if symbol is any of the alias
+                    return forEachEntry(symbols, symbolFromSymbolTable => {
+                        if (symbolFromSymbolTable.flags & SymbolFlags.Alias
+                            && symbolFromSymbolTable.name !== "export="
+                            && !getDeclarationOfKind(symbolFromSymbolTable, SyntaxKind.ExportSpecifier)) {
+                            if (!useOnlyExternalAliasing || // We can use any type of alias to get the name
+                                // Is this external alias, then use it to name
+                                ts.forEach(symbolFromSymbolTable.declarations, isExternalModuleImportEqualsDeclaration)) {
 
-                            const resolvedImportedSymbol = resolveAlias(symbolFromSymbolTable);
-                            if (isAccessible(symbolFromSymbolTable, resolveAlias(symbolFromSymbolTable))) {
-                                return [symbolFromSymbolTable];
-                            }
+                                const resolvedImportedSymbol = resolveAlias(symbolFromSymbolTable);
+                                if (isAccessible(symbolFromSymbolTable, resolvedImportedSymbol)) {
+                                    return [symbolFromSymbolTable];
+                                }
 
-                            // Look in the exported members, if we can find accessibleSymbolChain, symbol is accessible using this chain
-                            // but only if the symbolFromSymbolTable can be qualified
-                            const accessibleSymbolsFromExports = resolvedImportedSymbol.exports ? getAccessibleSymbolChainFromSymbolTable(resolvedImportedSymbol.exports) : undefined;
-                            if (accessibleSymbolsFromExports && canQualifySymbol(symbolFromSymbolTable, getQualifiedLeftMeaning(meaning))) {
-                                return [symbolFromSymbolTable].concat(accessibleSymbolsFromExports);
+                                // Look in the exported members, if we can find accessibleSymbolChain, symbol is accessible using this chain
+                                // but only if the symbolFromSymbolTable can be qualified
+                                const accessibleSymbolsFromExports = resolvedImportedSymbol.exports ? getAccessibleSymbolChainFromSymbolTableWorker(resolvedImportedSymbol.exports, visitedSymbolTables) : undefined;
+                                if (accessibleSymbolsFromExports && canQualifySymbol(symbolFromSymbolTable, getQualifiedLeftMeaning(meaning))) {
+                                    return [symbolFromSymbolTable].concat(accessibleSymbolsFromExports);
+                                }
                             }
                         }
-                    }
-                });
+                    });
+                }
             }
 
             if (symbol) {
@@ -1718,7 +2074,7 @@ namespace ts {
             let qualify = false;
             forEachSymbolTableInScope(enclosingDeclaration, symbolTable => {
                 // If symbol of this name is not available in the symbol table we are ok
-                let symbolFromSymbolTable = symbolTable[symbol.name];
+                let symbolFromSymbolTable = symbolTable.get(symbol.name);
                 if (!symbolFromSymbolTable) {
                     // Continue to the next symbol table
                     return false;
@@ -1829,11 +2185,8 @@ namespace ts {
             return { accessibility: SymbolAccessibility.Accessible };
 
             function getExternalModuleContainer(declaration: Node) {
-                for (; declaration; declaration = declaration.parent) {
-                    if (hasExternalModuleSymbol(declaration)) {
-                        return getSymbolOfNode(declaration);
-                    }
-                }
+                const node = findAncestor(declaration, hasExternalModuleSymbol);
+                return node && getSymbolOfNode(node);
             }
         }
 
@@ -1942,91 +2295,685 @@ namespace ts {
         }
 
         function typeToString(type: Type, enclosingDeclaration?: Node, flags?: TypeFormatFlags): string {
-            const writer = getSingleLineStringWriter();
-            getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
-            let result = writer.string();
-            releaseStringWriter(writer);
+            const typeNode = nodeBuilder.typeToTypeNode(type, enclosingDeclaration, toNodeBuilderFlags(flags) | NodeBuilderFlags.IgnoreErrors | NodeBuilderFlags.WriteTypeParametersInQualifiedName);
+            Debug.assert(typeNode !== undefined, "should always get typenode");
+            const options = { removeComments: true };
+            const writer = createTextWriter("");
+            const printer = createPrinter(options);
+            const sourceFile = enclosingDeclaration && getSourceFileOfNode(enclosingDeclaration);
+            printer.writeNode(EmitHint.Unspecified, typeNode, /*sourceFile*/ sourceFile, writer);
+            const result = writer.getText();
 
             const maxLength = compilerOptions.noErrorTruncation || flags & TypeFormatFlags.NoTruncation ? undefined : 100;
             if (maxLength && result.length >= maxLength) {
-                result = result.substr(0, maxLength - "...".length) + "...";
+                return result.substr(0, maxLength - "...".length) + "...";
             }
             return result;
-        }
 
-        function typePredicateToString(typePredicate: TypePredicate, enclosingDeclaration?: Declaration, flags?: TypeFormatFlags): string {
-            const writer = getSingleLineStringWriter();
-            getSymbolDisplayBuilder().buildTypePredicateDisplay(typePredicate, writer, enclosingDeclaration, flags);
-            const result = writer.string();
-            releaseStringWriter(writer);
+            function toNodeBuilderFlags(flags?: TypeFormatFlags): NodeBuilderFlags {
+                let result = NodeBuilderFlags.None;
+                if (!flags) {
+                    return result;
+                }
+                if (flags & TypeFormatFlags.NoTruncation) {
+                    result |= NodeBuilderFlags.NoTruncation;
+                }
+                if (flags & TypeFormatFlags.UseFullyQualifiedType) {
+                    result |= NodeBuilderFlags.UseFullyQualifiedType;
+                }
+                if (flags & TypeFormatFlags.SuppressAnyReturnType) {
+                    result |= NodeBuilderFlags.SuppressAnyReturnType;
+                }
+                if (flags & TypeFormatFlags.WriteArrayAsGenericType) {
+                    result |= NodeBuilderFlags.WriteArrayAsGenericType;
+                }
+                if (flags & TypeFormatFlags.WriteTypeArgumentsOfSignature) {
+                    result |= NodeBuilderFlags.WriteTypeArgumentsOfSignature;
+                }
 
-            return result;
+                return result;
+            }
         }
 
-        function formatUnionTypes(types: Type[]): Type[] {
-            const result: Type[] = [];
-            let flags: TypeFlags = 0;
-            for (let i = 0; i < types.length; i++) {
-                const t = types[i];
-                flags |= t.flags;
-                if (!(t.flags & TypeFlags.Nullable)) {
-                    if (t.flags & (TypeFlags.BooleanLiteral | TypeFlags.EnumLiteral)) {
-                        const baseType = t.flags & TypeFlags.BooleanLiteral ? booleanType : (<EnumLiteralType>t).baseType;
-                        const count = baseType.types.length;
-                        if (i + count <= types.length && types[i + count - 1] === baseType.types[count - 1]) {
-                            result.push(baseType);
-                            i += count - 1;
-                            continue;
-                        }
-                    }
-                    result.push(t);
+        function createNodeBuilder() {
+            return {
+                typeToTypeNode: (type: Type, enclosingDeclaration?: Node, flags?: NodeBuilderFlags) => {
+                    const context = createNodeBuilderContext(enclosingDeclaration, flags);
+                    const resultingNode = typeToTypeNodeHelper(type, context);
+                    const result = context.encounteredError ? undefined : resultingNode;
+                    return result;
+                },
+                indexInfoToIndexSignatureDeclaration: (indexInfo: IndexInfo, kind: IndexKind, enclosingDeclaration?: Node, flags?: NodeBuilderFlags) => {
+                    const context = createNodeBuilderContext(enclosingDeclaration, flags);
+                    const resultingNode = indexInfoToIndexSignatureDeclarationHelper(indexInfo, kind, context);
+                    const result = context.encounteredError ? undefined : resultingNode;
+                    return result;
+                },
+                signatureToSignatureDeclaration: (signature: Signature, kind: SyntaxKind, enclosingDeclaration?: Node, flags?: NodeBuilderFlags) => {
+                    const context = createNodeBuilderContext(enclosingDeclaration, flags);
+                    const resultingNode = signatureToSignatureDeclarationHelper(signature, kind, context);
+                    const result = context.encounteredError ? undefined : resultingNode;
+                    return result;
                 }
-            }
-            if (flags & TypeFlags.Null) result.push(nullType);
-            if (flags & TypeFlags.Undefined) result.push(undefinedType);
-            return result || types;
-        }
+            };
 
-        function visibilityToString(flags: ModifierFlags) {
-            if (flags === ModifierFlags.Private) {
-                return "private";
+            interface NodeBuilderContext {
+                enclosingDeclaration: Node | undefined;
+                flags: NodeBuilderFlags | undefined;
+
+                // State
+                encounteredError: boolean;
+                symbolStack: Symbol[] | undefined;
             }
-            if (flags === ModifierFlags.Protected) {
-                return "protected";
+
+            function createNodeBuilderContext(enclosingDeclaration: Node | undefined, flags: NodeBuilderFlags | undefined): NodeBuilderContext {
+                return {
+                    enclosingDeclaration,
+                    flags,
+                    encounteredError: false,
+                    symbolStack: undefined
+                };
             }
-            return "public";
-        }
 
-        function getTypeAliasForTypeLiteral(type: Type): Symbol {
-            if (type.symbol && type.symbol.flags & SymbolFlags.TypeLiteral) {
-                let node = type.symbol.declarations[0].parent;
-                while (node.kind === SyntaxKind.ParenthesizedType) {
-                    node = node.parent;
+            function typeToTypeNodeHelper(type: Type, context: NodeBuilderContext): TypeNode {
+                const inTypeAlias = context.flags & NodeBuilderFlags.InTypeAlias;
+                context.flags &= ~NodeBuilderFlags.InTypeAlias;
+
+                if (!type) {
+                    context.encounteredError = true;
+                    return undefined;
                 }
-                if (node.kind === SyntaxKind.TypeAliasDeclaration) {
-                    return getSymbolOfNode(node);
+
+                if (type.flags & TypeFlags.Any) {
+                    return createKeywordTypeNode(SyntaxKind.AnyKeyword);
+                }
+                if (type.flags & TypeFlags.String) {
+                    return createKeywordTypeNode(SyntaxKind.StringKeyword);
+                }
+                if (type.flags & TypeFlags.Number) {
+                    return createKeywordTypeNode(SyntaxKind.NumberKeyword);
+                }
+                if (type.flags & TypeFlags.Boolean) {
+                    return createKeywordTypeNode(SyntaxKind.BooleanKeyword);
+                }
+                if (type.flags & TypeFlags.EnumLiteral && !(type.flags & TypeFlags.Union)) {
+                    const parentSymbol = getParentOfSymbol(type.symbol);
+                    const parentName = symbolToName(parentSymbol, context, SymbolFlags.Type, /*expectsIdentifier*/ false);
+                    const enumLiteralName = getDeclaredTypeOfSymbol(parentSymbol) === type ? parentName : createQualifiedName(parentName, getNameOfSymbol(type.symbol, context));
+                    return createTypeReferenceNode(enumLiteralName, /*typeArguments*/ undefined);
+                }
+                if (type.flags & TypeFlags.EnumLike) {
+                    const name = symbolToName(type.symbol, context, SymbolFlags.Type, /*expectsIdentifier*/ false);
+                    return createTypeReferenceNode(name, /*typeArguments*/ undefined);
+                }
+                if (type.flags & (TypeFlags.StringLiteral)) {
+                    return createLiteralTypeNode(setEmitFlags(createLiteral((<StringLiteralType>type).value), EmitFlags.NoAsciiEscaping));
+                }
+                if (type.flags & (TypeFlags.NumberLiteral)) {
+                    return createLiteralTypeNode((createLiteral((<NumberLiteralType>type).value)));
+                }
+                if (type.flags & TypeFlags.BooleanLiteral) {
+                    return (<IntrinsicType>type).intrinsicName === "true" ? createTrue() : createFalse();
+                }
+                if (type.flags & TypeFlags.Void) {
+                    return createKeywordTypeNode(SyntaxKind.VoidKeyword);
+                }
+                if (type.flags & TypeFlags.Undefined) {
+                    return createKeywordTypeNode(SyntaxKind.UndefinedKeyword);
+                }
+                if (type.flags & TypeFlags.Null) {
+                    return createKeywordTypeNode(SyntaxKind.NullKeyword);
+                }
+                if (type.flags & TypeFlags.Never) {
+                    return createKeywordTypeNode(SyntaxKind.NeverKeyword);
+                }
+                if (type.flags & TypeFlags.ESSymbol) {
+                    return createKeywordTypeNode(SyntaxKind.SymbolKeyword);
+                }
+                if (type.flags & TypeFlags.NonPrimitive) {
+                    return createKeywordTypeNode(SyntaxKind.ObjectKeyword);
+                }
+                if (type.flags & TypeFlags.TypeParameter && (type as TypeParameter).isThisType) {
+                    if (context.flags & NodeBuilderFlags.InObjectTypeLiteral) {
+                        if (!context.encounteredError && !(context.flags & NodeBuilderFlags.AllowThisInObjectLiteral)) {
+                            context.encounteredError = true;
+                        }
+                    }
+                    return createThis();
+                }
+
+                const objectFlags = getObjectFlags(type);
+
+                if (objectFlags & ObjectFlags.Reference) {
+                    Debug.assert(!!(type.flags & TypeFlags.Object));
+                    return typeReferenceToTypeNode(<TypeReference>type);
+                }
+                if (type.flags & TypeFlags.TypeParameter || objectFlags & ObjectFlags.ClassOrInterface) {
+                    const name = symbolToName(type.symbol, context, SymbolFlags.Type, /*expectsIdentifier*/ false);
+                    // Ignore constraint/default when creating a usage (as opposed to declaration) of a type parameter.
+                    return createTypeReferenceNode(name, /*typeArguments*/ undefined);
+                }
+                if (!inTypeAlias && type.aliasSymbol &&
+                    isSymbolAccessible(type.aliasSymbol, context.enclosingDeclaration, SymbolFlags.Type, /*shouldComputeAliasesToMakeVisible*/ false).accessibility === SymbolAccessibility.Accessible) {
+                    const name = symbolToTypeReferenceName(type.aliasSymbol);
+                    const typeArgumentNodes = mapToTypeNodes(type.aliasTypeArguments, context);
+                    return createTypeReferenceNode(name, typeArgumentNodes);
+                }
+                if (type.flags & (TypeFlags.Union | TypeFlags.Intersection)) {
+                    const types = type.flags & TypeFlags.Union ? formatUnionTypes((<UnionType>type).types) : (<IntersectionType>type).types;
+                    const typeNodes = mapToTypeNodes(types, context);
+                    if (typeNodes && typeNodes.length > 0) {
+                        const unionOrIntersectionTypeNode = createUnionOrIntersectionTypeNode(type.flags & TypeFlags.Union ? SyntaxKind.UnionType : SyntaxKind.IntersectionType, typeNodes);
+                        return unionOrIntersectionTypeNode;
+                    }
+                    else {
+                        if (!context.encounteredError && !(context.flags & NodeBuilderFlags.AllowEmptyUnionOrIntersection)) {
+                            context.encounteredError = true;
+                        }
+                        return undefined;
+                    }
+                }
+                if (objectFlags & (ObjectFlags.Anonymous | ObjectFlags.Mapped)) {
+                    Debug.assert(!!(type.flags & TypeFlags.Object));
+                    // The type is an object literal type.
+                    return createAnonymousTypeNode(<ObjectType>type);
+                }
+                if (type.flags & TypeFlags.Index) {
+                    const indexedType = (<IndexType>type).type;
+                    const indexTypeNode = typeToTypeNodeHelper(indexedType, context);
+                    return createTypeOperatorNode(indexTypeNode);
+                }
+                if (type.flags & TypeFlags.IndexedAccess) {
+                    const objectTypeNode = typeToTypeNodeHelper((<IndexedAccessType>type).objectType, context);
+                    const indexTypeNode = typeToTypeNodeHelper((<IndexedAccessType>type).indexType, context);
+                    return createIndexedAccessTypeNode(objectTypeNode, indexTypeNode);
+                }
+
+                Debug.fail("Should be unreachable.");
+
+                function createMappedTypeNodeFromType(type: MappedType) {
+                    Debug.assert(!!(type.flags & TypeFlags.Object));
+                    const readonlyToken = type.declaration && type.declaration.readonlyToken ? createToken(SyntaxKind.ReadonlyKeyword) : undefined;
+                    const questionToken = type.declaration && type.declaration.questionToken ? createToken(SyntaxKind.QuestionToken) : undefined;
+                    const typeParameterNode = typeParameterToDeclaration(getTypeParameterFromMappedType(type), context);
+                    const templateTypeNode = typeToTypeNodeHelper(getTemplateTypeFromMappedType(type), context);
+
+                    const mappedTypeNode = createMappedTypeNode(readonlyToken, typeParameterNode, questionToken, templateTypeNode);
+                    return setEmitFlags(mappedTypeNode, EmitFlags.SingleLine);
+                }
+
+                function createAnonymousTypeNode(type: ObjectType): TypeNode {
+                    const symbol = type.symbol;
+                    if (symbol) {
+                        // Always use 'typeof T' for type of class, enum, and module objects
+                        if (symbol.flags & SymbolFlags.Class && !getBaseTypeVariableOfClass(symbol) ||
+                            symbol.flags & (SymbolFlags.Enum | SymbolFlags.ValueModule) ||
+                            shouldWriteTypeOfFunctionSymbol()) {
+                            return createTypeQueryNodeFromSymbol(symbol, SymbolFlags.Value);
+                        }
+                        else if (contains(context.symbolStack, symbol)) {
+                            // If type is an anonymous type literal in a type alias declaration, use type alias name
+                            const typeAlias = getTypeAliasForTypeLiteral(type);
+                            if (typeAlias) {
+                                // The specified symbol flags need to be reinterpreted as type flags
+                                const entityName = symbolToName(typeAlias, context, SymbolFlags.Type, /*expectsIdentifier*/ false);
+                                return createTypeReferenceNode(entityName, /*typeArguments*/ undefined);
+                            }
+                            else {
+                                return createKeywordTypeNode(SyntaxKind.AnyKeyword);
+                            }
+                        }
+                        else {
+                            // Since instantiations of the same anonymous type have the same symbol, tracking symbols instead
+                            // of types allows us to catch circular references to instantiations of the same anonymous type
+                            if (!context.symbolStack) {
+                                context.symbolStack = [];
+                            }
+                            context.symbolStack.push(symbol);
+                            const result = createTypeNodeFromObjectType(type);
+                            context.symbolStack.pop();
+                            return result;
+                        }
+                    }
+                    else {
+                        // Anonymous types without a symbol are never circular.
+                        return createTypeNodeFromObjectType(type);
+                    }
+
+                    function shouldWriteTypeOfFunctionSymbol() {
+                        const isStaticMethodSymbol = !!(symbol.flags & SymbolFlags.Method &&  // typeof static method
+                            forEach(symbol.declarations, declaration => getModifierFlags(declaration) & ModifierFlags.Static));
+                        const isNonLocalFunctionSymbol = !!(symbol.flags & SymbolFlags.Function) &&
+                            (symbol.parent || // is exported function symbol
+                                forEach(symbol.declarations, declaration =>
+                                    declaration.parent.kind === SyntaxKind.SourceFile || declaration.parent.kind === SyntaxKind.ModuleBlock));
+                        if (isStaticMethodSymbol || isNonLocalFunctionSymbol) {
+                            // typeof is allowed only for static/non local functions
+                            return contains(context.symbolStack, symbol); // it is type of the symbol uses itself recursively
+                        }
+                    }
+                }
+
+                function createTypeNodeFromObjectType(type: ObjectType): TypeNode {
+                    if (type.objectFlags & ObjectFlags.Mapped) {
+                        if (getConstraintTypeFromMappedType(<MappedType>type).flags & (TypeFlags.TypeParameter | TypeFlags.Index)) {
+                            return createMappedTypeNodeFromType(<MappedType>type);
+                        }
+                    }
+
+                    const resolved = resolveStructuredTypeMembers(type);
+                    if (!resolved.properties.length && !resolved.stringIndexInfo && !resolved.numberIndexInfo) {
+                        if (!resolved.callSignatures.length && !resolved.constructSignatures.length) {
+                            return setEmitFlags(createTypeLiteralNode(/*members*/ undefined), EmitFlags.SingleLine);
+                        }
+
+                        if (resolved.callSignatures.length === 1 && !resolved.constructSignatures.length) {
+                            const signature = resolved.callSignatures[0];
+                            const signatureNode = <FunctionTypeNode>signatureToSignatureDeclarationHelper(signature, SyntaxKind.FunctionType, context);
+                            return signatureNode;
+
+                        }
+
+                        if (resolved.constructSignatures.length === 1 && !resolved.callSignatures.length) {
+                            const signature = resolved.constructSignatures[0];
+                            const signatureNode = <ConstructorTypeNode>signatureToSignatureDeclarationHelper(signature, SyntaxKind.ConstructorType, context);
+                            return signatureNode;
+                        }
+                    }
+
+                    const savedFlags = context.flags;
+                    context.flags |= NodeBuilderFlags.InObjectTypeLiteral;
+                    const members = createTypeNodesFromResolvedType(resolved);
+                    context.flags = savedFlags;
+                    const typeLiteralNode = createTypeLiteralNode(members);
+                    return setEmitFlags(typeLiteralNode, EmitFlags.SingleLine);
+                }
+
+                function createTypeQueryNodeFromSymbol(symbol: Symbol, symbolFlags: SymbolFlags) {
+                    const entityName = symbolToName(symbol, context, symbolFlags, /*expectsIdentifier*/ false);
+                    return createTypeQueryNode(entityName);
+                }
+
+                function symbolToTypeReferenceName(symbol: Symbol) {
+                    // Unnamed function expressions and arrow functions have reserved names that we don't want to display
+                    const entityName = symbol.flags & SymbolFlags.Class || !isReservedMemberName(symbol.name) ? symbolToName(symbol, context, SymbolFlags.Type, /*expectsIdentifier*/ false) : createIdentifier("");
+                    return entityName;
+                }
+
+                function typeReferenceToTypeNode(type: TypeReference) {
+                    const typeArguments: Type[] = type.typeArguments || emptyArray;
+                    if (type.target === globalArrayType) {
+                        if (context.flags & NodeBuilderFlags.WriteArrayAsGenericType) {
+                            const typeArgumentNode = typeToTypeNodeHelper(typeArguments[0], context);
+                            return createTypeReferenceNode("Array", [typeArgumentNode]);
+                        }
+
+                        const elementType = typeToTypeNodeHelper(typeArguments[0], context);
+                        return createArrayTypeNode(elementType);
+                    }
+                    else if (type.target.objectFlags & ObjectFlags.Tuple) {
+                        if (typeArguments.length > 0) {
+                            const tupleConstituentNodes = mapToTypeNodes(typeArguments.slice(0, getTypeReferenceArity(type)), context);
+                            if (tupleConstituentNodes && tupleConstituentNodes.length > 0) {
+                                return createTupleTypeNode(tupleConstituentNodes);
+                            }
+                        }
+                        if (!context.encounteredError && !(context.flags & NodeBuilderFlags.AllowEmptyTuple)) {
+                            context.encounteredError = true;
+                        }
+                        return undefined;
+                    }
+                    else {
+                        const outerTypeParameters = type.target.outerTypeParameters;
+                        let i = 0;
+                        let qualifiedName: QualifiedName | undefined;
+                        if (outerTypeParameters) {
+                            const length = outerTypeParameters.length;
+                            while (i < length) {
+                                // Find group of type arguments for type parameters with the same declaring container.
+                                const start = i;
+                                const parent = getParentSymbolOfTypeParameter(outerTypeParameters[i]);
+                                do {
+                                    i++;
+                                } while (i < length && getParentSymbolOfTypeParameter(outerTypeParameters[i]) === parent);
+                                // When type parameters are their own type arguments for the whole group (i.e. we have
+                                // the default outer type arguments), we don't show the group.
+                                if (!rangeEquals(outerTypeParameters, typeArguments, start, i)) {
+                                    const typeArgumentSlice = mapToTypeNodes(typeArguments.slice(start, i), context);
+                                    const typeArgumentNodes = typeArgumentSlice && createNodeArray(typeArgumentSlice);
+                                    const namePart = symbolToTypeReferenceName(parent);
+                                    (namePart.kind === SyntaxKind.Identifier ? <Identifier>namePart : namePart.right).typeArguments = typeArgumentNodes;
+
+                                    if (qualifiedName) {
+                                        Debug.assert(!qualifiedName.right);
+                                        qualifiedName = addToQualifiedNameMissingRightIdentifier(qualifiedName, namePart);
+                                        qualifiedName = createQualifiedName(qualifiedName, /*right*/ undefined);
+                                    }
+                                    else {
+                                        qualifiedName = createQualifiedName(namePart, /*right*/ undefined);
+                                    }
+                                }
+                            }
+                        }
+
+                        let entityName: EntityName = undefined;
+                        const nameIdentifier = symbolToTypeReferenceName(type.symbol);
+                        if (qualifiedName) {
+                            Debug.assert(!qualifiedName.right);
+                            qualifiedName = addToQualifiedNameMissingRightIdentifier(qualifiedName, nameIdentifier);
+                            entityName = qualifiedName;
+                        }
+                        else {
+                            entityName = nameIdentifier;
+                        }
+
+                        let typeArgumentNodes: TypeNode[] | undefined;
+                        if (typeArguments.length > 0) {
+                            const typeParameterCount = (type.target.typeParameters || emptyArray).length;
+                            typeArgumentNodes = mapToTypeNodes(typeArguments.slice(i, typeParameterCount), context);
+                        }
+
+                        if (typeArgumentNodes) {
+                            const lastIdentifier = entityName.kind === SyntaxKind.Identifier ? <Identifier>entityName : entityName.right;
+                            lastIdentifier.typeArguments = undefined;
+                        }
+
+                        return createTypeReferenceNode(entityName, typeArgumentNodes);
+                    }
+                }
+
+                function addToQualifiedNameMissingRightIdentifier(left: QualifiedName, right: Identifier | QualifiedName) {
+                    Debug.assert(left.right === undefined);
+
+                    if (right.kind === SyntaxKind.Identifier) {
+                        left.right = right;
+                        return left;
+                    }
+
+                    let rightPart = right;
+                    while (rightPart.left.kind !== SyntaxKind.Identifier) {
+                        rightPart = rightPart.left;
+                    }
+
+                    left.right = <Identifier>rightPart.left;
+                    rightPart.left = left;
+                    return right;
+                }
+
+                function createTypeNodesFromResolvedType(resolvedType: ResolvedType): TypeElement[] {
+                    const typeElements: TypeElement[] = [];
+                    for (const signature of resolvedType.callSignatures) {
+                        typeElements.push(<CallSignatureDeclaration>signatureToSignatureDeclarationHelper(signature, SyntaxKind.CallSignature, context));
+                    }
+                    for (const signature of resolvedType.constructSignatures) {
+                        typeElements.push(<ConstructSignatureDeclaration>signatureToSignatureDeclarationHelper(signature, SyntaxKind.ConstructSignature, context));
+                    }
+                    if (resolvedType.stringIndexInfo) {
+                        typeElements.push(indexInfoToIndexSignatureDeclarationHelper(resolvedType.stringIndexInfo, IndexKind.String, context));
+                    }
+                    if (resolvedType.numberIndexInfo) {
+                        typeElements.push(indexInfoToIndexSignatureDeclarationHelper(resolvedType.numberIndexInfo, IndexKind.Number, context));
+                    }
+
+                    const properties = resolvedType.properties;
+                    if (!properties) {
+                        return typeElements;
+                    }
+
+                    for (const propertySymbol of properties) {
+                        const propertyType = getTypeOfSymbol(propertySymbol);
+                        const saveEnclosingDeclaration = context.enclosingDeclaration;
+                        context.enclosingDeclaration = undefined;
+                        const propertyName = symbolToName(propertySymbol, context, SymbolFlags.Value, /*expectsIdentifier*/ true);
+                        context.enclosingDeclaration = saveEnclosingDeclaration;
+                        const optionalToken = propertySymbol.flags & SymbolFlags.Optional ? createToken(SyntaxKind.QuestionToken) : undefined;
+                        if (propertySymbol.flags & (SymbolFlags.Function | SymbolFlags.Method) && !getPropertiesOfObjectType(propertyType).length) {
+                            const signatures = getSignaturesOfType(propertyType, SignatureKind.Call);
+                            for (const signature of signatures) {
+                                const methodDeclaration = <MethodSignature>signatureToSignatureDeclarationHelper(signature, SyntaxKind.MethodSignature, context);
+                                methodDeclaration.name = propertyName;
+                                methodDeclaration.questionToken = optionalToken;
+                                typeElements.push(methodDeclaration);
+                            }
+                        }
+                        else {
+                            const propertyTypeNode = propertyType ? typeToTypeNodeHelper(propertyType, context) : createKeywordTypeNode(SyntaxKind.AnyKeyword);
+
+                            const modifiers = isReadonlySymbol(propertySymbol) ? [createToken(SyntaxKind.ReadonlyKeyword)] : undefined;
+                            const propertySignature = createPropertySignature(
+                                modifiers,
+                                propertyName,
+                                optionalToken,
+                                propertyTypeNode,
+                               /*initializer*/ undefined);
+                            typeElements.push(propertySignature);
+                        }
+                    }
+                    return typeElements.length ? typeElements : undefined;
                 }
             }
-            return undefined;
-        }
 
-        function isTopLevelInExternalModuleAugmentation(node: Node): boolean {
-            return node && node.parent &&
-                node.parent.kind === SyntaxKind.ModuleBlock &&
-                isExternalModuleAugmentation(node.parent.parent);
-        }
+            function mapToTypeNodes(types: Type[], context: NodeBuilderContext): TypeNode[] {
+                if (some(types)) {
+                    const result = [];
+                    for (let i = 0; i < types.length; ++i) {
+                        const type = types[i];
+                        const typeNode = typeToTypeNodeHelper(type, context);
+                        if (typeNode) {
+                            result.push(typeNode);
+                        }
+                    }
 
-        function literalTypeToString(type: LiteralType) {
-            return type.flags & TypeFlags.StringLiteral ? `"${escapeString((<LiteralType>type).text)}"` : (<LiteralType>type).text;
-        }
+                    return result;
+                }
+            }
 
-        function getSymbolDisplayBuilder(): SymbolDisplayBuilder {
+            function indexInfoToIndexSignatureDeclarationHelper(indexInfo: IndexInfo, kind: IndexKind, context: NodeBuilderContext): IndexSignatureDeclaration {
+                const name = getNameFromIndexInfo(indexInfo) || "x";
+                const indexerTypeNode = createKeywordTypeNode(kind === IndexKind.String ? SyntaxKind.StringKeyword : SyntaxKind.NumberKeyword);
+
+                const indexingParameter = createParameter(
+                    /*decorators*/ undefined,
+                    /*modifiers*/ undefined,
+                    /*dotDotDotToken*/ undefined,
+                    name,
+                    /*questionToken*/ undefined,
+                    indexerTypeNode,
+                    /*initializer*/ undefined);
+                const typeNode = typeToTypeNodeHelper(indexInfo.type, context);
+                return createIndexSignature(
+                    /*decorators*/ undefined,
+                    indexInfo.isReadonly ? [createToken(SyntaxKind.ReadonlyKeyword)] : undefined,
+                    [indexingParameter],
+                    typeNode);
+            }
+
+            function signatureToSignatureDeclarationHelper(signature: Signature, kind: SyntaxKind, context: NodeBuilderContext): SignatureDeclaration {
+                const typeParameters = signature.typeParameters && signature.typeParameters.map(parameter => typeParameterToDeclaration(parameter, context));
+                const parameters = signature.parameters.map(parameter => symbolToParameterDeclaration(parameter, context));
+                if (signature.thisParameter) {
+                    const thisParameter = symbolToParameterDeclaration(signature.thisParameter, context);
+                    parameters.unshift(thisParameter);
+                }
+                let returnTypeNode: TypeNode;
+                if (signature.typePredicate) {
+                    const typePredicate = signature.typePredicate;
+                    const parameterName = typePredicate.kind === TypePredicateKind.Identifier ?
+                        setEmitFlags(createIdentifier((<IdentifierTypePredicate>typePredicate).parameterName), EmitFlags.NoAsciiEscaping) :
+                        createThisTypeNode();
+                    const typeNode = typeToTypeNodeHelper(typePredicate.type, context);
+                    returnTypeNode = createTypePredicateNode(parameterName, typeNode);
+                }
+                else {
+                    const returnType = getReturnTypeOfSignature(signature);
+                    returnTypeNode = returnType && typeToTypeNodeHelper(returnType, context);
+                }
+                if (context.flags & NodeBuilderFlags.SuppressAnyReturnType) {
+                    if (returnTypeNode && returnTypeNode.kind === SyntaxKind.AnyKeyword) {
+                        returnTypeNode = undefined;
+                    }
+                }
+                else if (!returnTypeNode) {
+                    returnTypeNode = createKeywordTypeNode(SyntaxKind.AnyKeyword);
+                }
+                return createSignatureDeclaration(kind, typeParameters, parameters, returnTypeNode);
+            }
+
+            function typeParameterToDeclaration(type: TypeParameter, context: NodeBuilderContext): TypeParameterDeclaration {
+                const name = symbolToName(type.symbol, context, SymbolFlags.Type, /*expectsIdentifier*/ true);
+                const constraint = getConstraintFromTypeParameter(type);
+                const constraintNode = constraint && typeToTypeNodeHelper(constraint, context);
+                const defaultParameter = getDefaultFromTypeParameter(type);
+                const defaultParameterNode = defaultParameter && typeToTypeNodeHelper(defaultParameter, context);
+                return createTypeParameterDeclaration(name, constraintNode, defaultParameterNode);
+            }
+
+            function symbolToParameterDeclaration(parameterSymbol: Symbol, context: NodeBuilderContext): ParameterDeclaration {
+                const parameterDeclaration = getDeclarationOfKind<ParameterDeclaration>(parameterSymbol, SyntaxKind.Parameter);
+                if (isTransientSymbol(parameterSymbol) && parameterSymbol.isRestParameter) {
+                    // special-case synthetic rest parameters in JS files
+                    return createParameter(
+                        /*decorators*/ undefined,
+                        /*modifiers*/ undefined,
+                        parameterSymbol.isRestParameter ? createToken(SyntaxKind.DotDotDotToken) : undefined,
+                        "args",
+                        /*questionToken*/ undefined,
+                        typeToTypeNodeHelper(anyArrayType, context),
+                        /*initializer*/ undefined);
+                }
+                const modifiers = parameterDeclaration.modifiers && parameterDeclaration.modifiers.map(getSynthesizedClone);
+                const dotDotDotToken = isRestParameter(parameterDeclaration) ? createToken(SyntaxKind.DotDotDotToken) : undefined;
+                const name = parameterDeclaration.name ?
+                    parameterDeclaration.name.kind === SyntaxKind.Identifier ?
+                        setEmitFlags(getSynthesizedClone(parameterDeclaration.name), EmitFlags.NoAsciiEscaping) :
+                        cloneBindingName(parameterDeclaration.name) :
+                    parameterSymbol.name;
+                const questionToken = isOptionalParameter(parameterDeclaration) ? createToken(SyntaxKind.QuestionToken) : undefined;
+
+                let parameterType = getTypeOfSymbol(parameterSymbol);
+                if (isRequiredInitializedParameter(parameterDeclaration)) {
+                    parameterType = getNullableType(parameterType, TypeFlags.Undefined);
+                }
+                const parameterTypeNode = typeToTypeNodeHelper(parameterType, context);
+
+                const parameterNode = createParameter(
+                    /*decorators*/ undefined,
+                    modifiers,
+                    dotDotDotToken,
+                    name,
+                    questionToken,
+                    parameterTypeNode,
+                    /*initializer*/ undefined);
+                return parameterNode;
+
+                function cloneBindingName(node: BindingName): BindingName {
+                    return <BindingName>elideInitializerAndSetEmitFlags(node);
+                    function elideInitializerAndSetEmitFlags(node: Node): Node {
+                        const visited = visitEachChild(node, elideInitializerAndSetEmitFlags, nullTransformationContext, /*nodesVisitor*/ undefined, elideInitializerAndSetEmitFlags);
+                        const clone = nodeIsSynthesized(visited) ? visited : getSynthesizedClone(visited);
+                        if (clone.kind === SyntaxKind.BindingElement) {
+                            (<BindingElement>clone).initializer = undefined;
+                        }
+                        return setEmitFlags(clone, EmitFlags.SingleLine | EmitFlags.NoAsciiEscaping);
+                    }
+                }
+            }
+
+            function symbolToName(symbol: Symbol, context: NodeBuilderContext, meaning: SymbolFlags, expectsIdentifier: true): Identifier;
+            function symbolToName(symbol: Symbol, context: NodeBuilderContext, meaning: SymbolFlags, expectsIdentifier: false): EntityName;
+            function symbolToName(symbol: Symbol, context: NodeBuilderContext, meaning: SymbolFlags, expectsIdentifier: boolean): EntityName {
+
+                // Try to get qualified name if the symbol is not a type parameter and there is an enclosing declaration.
+                let chain: Symbol[];
+                const isTypeParameter = symbol.flags & SymbolFlags.TypeParameter;
+                if (!isTypeParameter && (context.enclosingDeclaration || context.flags & NodeBuilderFlags.UseFullyQualifiedType)) {
+                    chain = getSymbolChain(symbol, meaning, /*endOfChain*/ true);
+                    Debug.assert(chain && chain.length > 0);
+                }
+                else {
+                    chain = [symbol];
+                }
+
+                if (expectsIdentifier && chain.length !== 1
+                    && !context.encounteredError
+                    && !(context.flags & NodeBuilderFlags.AllowQualifedNameInPlaceOfIdentifier)) {
+                    context.encounteredError = true;
+                }
+                return createEntityNameFromSymbolChain(chain, chain.length - 1);
+
+                function createEntityNameFromSymbolChain(chain: Symbol[], index: number): EntityName {
+                    Debug.assert(chain && 0 <= index && index < chain.length);
+                    const symbol = chain[index];
+                    let typeParameterNodes: TypeNode[] | undefined;
+                    if (context.flags & NodeBuilderFlags.WriteTypeParametersInQualifiedName && index > 0) {
+                        const parentSymbol = chain[index - 1];
+                        let typeParameters: TypeParameter[];
+                        if (getCheckFlags(symbol) & CheckFlags.Instantiated) {
+                            typeParameters = getTypeParametersOfClassOrInterface(parentSymbol);
+                        }
+                        else {
+                            const targetSymbol = getTargetSymbol(parentSymbol);
+                            if (targetSymbol.flags & (SymbolFlags.Class | SymbolFlags.Interface | SymbolFlags.TypeAlias)) {
+                                typeParameters = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol);
+                            }
+                        }
+
+                        typeParameterNodes = mapToTypeNodes(typeParameters, context);
+                    }
+
+                    const symbolName = getNameOfSymbol(symbol, context);
+                    const identifier = setEmitFlags(createIdentifier(symbolName, typeParameterNodes), EmitFlags.NoAsciiEscaping);
+
+                    return index > 0 ? createQualifiedName(createEntityNameFromSymbolChain(chain, index - 1), identifier) : identifier;
+                }
+
+                /** @param endOfChain Set to false for recursive calls; non-recursive calls should always output something. */
+                function getSymbolChain(symbol: Symbol, meaning: SymbolFlags, endOfChain: boolean): Symbol[] | undefined {
+                    let accessibleSymbolChain = getAccessibleSymbolChain(symbol, context.enclosingDeclaration, meaning, /*useOnlyExternalAliasing*/ false);
+                    let parentSymbol: Symbol;
 
-            function getNameOfSymbol(symbol: Symbol): string {
-                if (symbol.declarations && symbol.declarations.length) {
-                    const declaration = symbol.declarations[0];
-                    if (declaration.name) {
-                        return declarationNameToString(declaration.name);
+                    if (!accessibleSymbolChain ||
+                        needsQualification(accessibleSymbolChain[0], context.enclosingDeclaration, accessibleSymbolChain.length === 1 ? meaning : getQualifiedLeftMeaning(meaning))) {
+
+                        // Go up and add our parent.
+                        const parent = getParentOfSymbol(accessibleSymbolChain ? accessibleSymbolChain[0] : symbol);
+                        if (parent) {
+                            const parentChain = getSymbolChain(parent, getQualifiedLeftMeaning(meaning), /*endOfChain*/ false);
+                            if (parentChain) {
+                                parentSymbol = parent;
+                                accessibleSymbolChain = parentChain.concat(accessibleSymbolChain || [symbol]);
+                            }
+                        }
+                    }
+
+                    if (accessibleSymbolChain) {
+                        return accessibleSymbolChain;
+                    }
+                    if (
+                        // If this is the last part of outputting the symbol, always output. The cases apply only to parent symbols.
+                        endOfChain ||
+                        // If a parent symbol is an external module, don't write it. (We prefer just `x` vs `"foo/bar".x`.)
+                        !(!parentSymbol && ts.forEach(symbol.declarations, hasExternalModuleSymbol)) &&
+                        // If a parent symbol is an anonymous type, don't write it.
+                        !(symbol.flags & (SymbolFlags.TypeLiteral | SymbolFlags.ObjectLiteral))) {
+
+                        return [symbol];
+                    }
+                }
+            }
+
+            function getNameOfSymbol(symbol: Symbol, context: NodeBuilderContext): string {
+                const declaration = firstOrUndefined(symbol.declarations);
+                if (declaration) {
+                    const name = getNameOfDeclaration(declaration);
+                    if (name) {
+                        return declarationNameToString(name);
+                    }
+                    if (declaration.parent && declaration.parent.kind === SyntaxKind.VariableDeclaration) {
+                        return declarationNameToString((<VariableDeclaration>declaration.parent).name);
+                    }
+                    if (!context.encounteredError && !(context.flags & NodeBuilderFlags.AllowAnonymousIdentifier)) {
+                        context.encounteredError = true;
                     }
                     switch (declaration.kind) {
                         case SyntaxKind.ClassExpression:
@@ -2038,6 +2985,95 @@ namespace ts {
                 }
                 return symbol.name;
             }
+        }
+
+        function typePredicateToString(typePredicate: TypePredicate, enclosingDeclaration?: Declaration, flags?: TypeFormatFlags): string {
+            const writer = getSingleLineStringWriter();
+            getSymbolDisplayBuilder().buildTypePredicateDisplay(typePredicate, writer, enclosingDeclaration, flags);
+            const result = writer.string();
+            releaseStringWriter(writer);
+
+            return result;
+        }
+
+        function formatUnionTypes(types: Type[]): Type[] {
+            const result: Type[] = [];
+            let flags: TypeFlags = 0;
+            for (let i = 0; i < types.length; i++) {
+                const t = types[i];
+                flags |= t.flags;
+                if (!(t.flags & TypeFlags.Nullable)) {
+                    if (t.flags & (TypeFlags.BooleanLiteral | TypeFlags.EnumLiteral)) {
+                        const baseType = t.flags & TypeFlags.BooleanLiteral ? booleanType : getBaseTypeOfEnumLiteralType(<LiteralType>t);
+                        if (baseType.flags & TypeFlags.Union) {
+                            const count = (<UnionType>baseType).types.length;
+                            if (i + count <= types.length && types[i + count - 1] === (<UnionType>baseType).types[count - 1]) {
+                                result.push(baseType);
+                                i += count - 1;
+                                continue;
+                            }
+                        }
+                    }
+                    result.push(t);
+                }
+            }
+            if (flags & TypeFlags.Null) result.push(nullType);
+            if (flags & TypeFlags.Undefined) result.push(undefinedType);
+            return result || types;
+        }
+
+        function visibilityToString(flags: ModifierFlags): string | undefined {
+            if (flags === ModifierFlags.Private) {
+                return "private";
+            }
+            if (flags === ModifierFlags.Protected) {
+                return "protected";
+            }
+            return "public";
+        }
+
+        function getTypeAliasForTypeLiteral(type: Type): Symbol {
+            if (type.symbol && type.symbol.flags & SymbolFlags.TypeLiteral) {
+                const node = findAncestor(type.symbol.declarations[0].parent, n => n.kind !== SyntaxKind.ParenthesizedType);
+                if (node.kind === SyntaxKind.TypeAliasDeclaration) {
+                    return getSymbolOfNode(node);
+                }
+            }
+            return undefined;
+        }
+
+        function isTopLevelInExternalModuleAugmentation(node: Node): boolean {
+            return node && node.parent &&
+                node.parent.kind === SyntaxKind.ModuleBlock &&
+                isExternalModuleAugmentation(node.parent.parent);
+        }
+
+        function literalTypeToString(type: LiteralType) {
+            return type.flags & TypeFlags.StringLiteral ? `"${escapeString((<StringLiteralType>type).value)}"` : "" + (<NumberLiteralType>type).value;
+        }
+
+        function getNameOfSymbol(symbol: Symbol): string {
+            if (symbol.declarations && symbol.declarations.length) {
+                const declaration = symbol.declarations[0];
+                const name = getNameOfDeclaration(declaration);
+                if (name) {
+                    return declarationNameToString(name);
+                }
+                if (declaration.parent && declaration.parent.kind === SyntaxKind.VariableDeclaration) {
+                    return declarationNameToString((<VariableDeclaration>declaration.parent).name);
+                }
+                switch (declaration.kind) {
+                    case SyntaxKind.ClassExpression:
+                        return "(Anonymous class)";
+                    case SyntaxKind.FunctionExpression:
+                    case SyntaxKind.ArrowFunction:
+                        return "(Anonymous function)";
+                }
+            }
+            return symbol.name;
+        }
+
+        function getSymbolDisplayBuilder(): SymbolDisplayBuilder {
 
             /**
              * Writes only the name of the symbol out to the writer. Uses the original source text
@@ -2083,9 +3119,9 @@ namespace ts {
                     if (parentSymbol) {
                         // Write type arguments of instantiated class/interface here
                         if (flags & SymbolFormatFlags.WriteTypeParametersOrArguments) {
-                            if (symbol.flags & SymbolFlags.Instantiated) {
-                                buildDisplayForTypeArgumentsAndDelimiters(getTypeParametersOfClassOrInterface(parentSymbol),
-                                    (<TransientSymbol>symbol).mapper, writer, enclosingDeclaration);
+                            if (getCheckFlags(symbol) & CheckFlags.Instantiated) {
+                                const params = getTypeParametersOfClassOrInterface(parentSymbol.flags & SymbolFlags.Alias ? resolveAlias(parentSymbol) : parentSymbol);
+                                buildDisplayForTypeArgumentsAndDelimiters(params, (<TransientSymbol>symbol).mapper, writer, enclosingDeclaration);
                             }
                             else {
                                 buildTypeParameterDisplayFromSymbol(parentSymbol, writer, enclosingDeclaration);
@@ -2152,7 +3188,7 @@ namespace ts {
             }
 
             function buildTypeDisplay(type: Type, writer: SymbolWriter, enclosingDeclaration?: Node, globalFlags?: TypeFormatFlags, symbolStack?: Symbol[]) {
-                const globalFlagsToPass = globalFlags & TypeFormatFlags.WriteOwnNameForAnyLike;
+                const globalFlagsToPass = globalFlags & (TypeFormatFlags.WriteOwnNameForAnyLike | TypeFormatFlags.WriteClassExpressionAsTypeLiteral);
                 let inObjectTypeLiteral = false;
                 return writeType(type, globalFlags);
 
@@ -2165,39 +3201,60 @@ namespace ts {
                             ? "any"
                             : (<IntrinsicType>type).intrinsicName);
                     }
-                    else if (type.flags & TypeFlags.ThisType) {
+                    else if (type.flags & TypeFlags.TypeParameter && (type as TypeParameter).isThisType) {
                         if (inObjectTypeLiteral) {
                             writer.reportInaccessibleThisError();
                         }
                         writer.writeKeyword("this");
                     }
-                    else if (type.flags & TypeFlags.Reference) {
+                    else if (getObjectFlags(type) & ObjectFlags.Reference) {
                         writeTypeReference(<TypeReference>type, nextFlags);
                     }
-                    else if (type.flags & TypeFlags.EnumLiteral) {
-                        buildSymbolDisplay(getParentOfSymbol(type.symbol), writer, enclosingDeclaration, SymbolFlags.Type, SymbolFormatFlags.None, nextFlags);
-                        writePunctuation(writer, SyntaxKind.DotToken);
-                        appendSymbolNameOnly(type.symbol, writer);
+                    else if (type.flags & TypeFlags.EnumLiteral && !(type.flags & TypeFlags.Union)) {
+                        const parent = getParentOfSymbol(type.symbol);
+                        buildSymbolDisplay(parent, writer, enclosingDeclaration, SymbolFlags.Type, SymbolFormatFlags.None, nextFlags);
+                        // In a literal enum type with a single member E { A }, E and E.A denote the
+                        // same type. We always display this type simply as E.
+                        if (getDeclaredTypeOfSymbol(parent) !== type) {
+                            writePunctuation(writer, SyntaxKind.DotToken);
+                            appendSymbolNameOnly(type.symbol, writer);
+                        }
                     }
-                    else if (type.flags & (TypeFlags.Class | TypeFlags.Interface | TypeFlags.Enum | TypeFlags.TypeParameter)) {
+                    else if (getObjectFlags(type) & ObjectFlags.ClassOrInterface || type.flags & (TypeFlags.EnumLike | TypeFlags.TypeParameter)) {
                         // The specified symbol flags need to be reinterpreted as type flags
                         buildSymbolDisplay(type.symbol, writer, enclosingDeclaration, SymbolFlags.Type, SymbolFormatFlags.None, nextFlags);
                     }
-                    else if (!(flags & TypeFormatFlags.InTypeAlias) && type.flags & (TypeFlags.Anonymous | TypeFlags.UnionOrIntersection) && type.aliasSymbol &&
+                    else if (!(flags & TypeFormatFlags.InTypeAlias) && type.aliasSymbol &&
                         isSymbolAccessible(type.aliasSymbol, enclosingDeclaration, SymbolFlags.Type, /*shouldComputeAliasesToMakeVisible*/ false).accessibility === SymbolAccessibility.Accessible) {
-                        // Only write out inferred type with its corresponding type-alias if type-alias is visible
                         const typeArguments = type.aliasTypeArguments;
-                        writeSymbolTypeReference(type.aliasSymbol, typeArguments, 0, typeArguments ? typeArguments.length : 0, nextFlags);
+                        writeSymbolTypeReference(type.aliasSymbol, typeArguments, 0, length(typeArguments), nextFlags);
                     }
                     else if (type.flags & TypeFlags.UnionOrIntersection) {
                         writeUnionOrIntersectionType(<UnionOrIntersectionType>type, nextFlags);
                     }
-                    else if (type.flags & TypeFlags.Anonymous) {
+                    else if (getObjectFlags(type) & (ObjectFlags.Anonymous | ObjectFlags.Mapped)) {
                         writeAnonymousType(<ObjectType>type, nextFlags);
                     }
                     else if (type.flags & TypeFlags.StringOrNumberLiteral) {
                         writer.writeStringLiteral(literalTypeToString(<LiteralType>type));
                     }
+                    else if (type.flags & TypeFlags.Index) {
+                        if (flags & TypeFormatFlags.InElementType) {
+                            writePunctuation(writer, SyntaxKind.OpenParenToken);
+                        }
+                        writer.writeKeyword("keyof");
+                        writeSpace(writer);
+                        writeType((<IndexType>type).type, TypeFormatFlags.InElementType);
+                        if (flags & TypeFormatFlags.InElementType) {
+                            writePunctuation(writer, SyntaxKind.CloseParenToken);
+                        }
+                    }
+                    else if (type.flags & TypeFlags.IndexedAccess) {
+                        writeType((<IndexedAccessType>type).objectType, TypeFormatFlags.InElementType);
+                        writePunctuation(writer, SyntaxKind.OpenBracketToken);
+                        writeType((<IndexedAccessType>type).indexType, TypeFormatFlags.None);
+                        writePunctuation(writer, SyntaxKind.CloseBracketToken);
+                    }
                     else {
                         // Should never get here
                         // { ... }
@@ -2209,6 +3266,7 @@ namespace ts {
                     }
                 }
 
+
                 function writeTypeList(types: Type[], delimiter: SyntaxKind) {
                     for (let i = 0; i < types.length; i++) {
                         if (i > 0) {
@@ -2248,11 +3306,16 @@ namespace ts {
                         writePunctuation(writer, SyntaxKind.OpenBracketToken);
                         writePunctuation(writer, SyntaxKind.CloseBracketToken);
                     }
-                    else if (type.target.flags & TypeFlags.Tuple) {
+                    else if (type.target.objectFlags & ObjectFlags.Tuple) {
                         writePunctuation(writer, SyntaxKind.OpenBracketToken);
                         writeTypeList(type.typeArguments.slice(0, getTypeReferenceArity(type)), SyntaxKind.CommaToken);
                         writePunctuation(writer, SyntaxKind.CloseBracketToken);
                     }
+                    else if (flags & TypeFormatFlags.WriteClassExpressionAsTypeLiteral &&
+                             type.symbol.valueDeclaration &&
+                             type.symbol.valueDeclaration.kind === SyntaxKind.ClassExpression) {
+                        writeAnonymousType(getDeclaredTypeOfClassOrInterface(type.symbol), flags);
+                    }
                     else {
                         // Write the type reference in the format f<A>.g<B>.C<X, Y> where A and B are type arguments
                         // for outer type parameters, and f and g are the respective declaring containers of those
@@ -2300,7 +3363,10 @@ namespace ts {
                     const symbol = type.symbol;
                     if (symbol) {
                         // Always use 'typeof T' for type of class, enum, and module objects
-                        if (symbol.flags & (SymbolFlags.Class | SymbolFlags.Enum | SymbolFlags.ValueModule)) {
+                        if (symbol.flags & SymbolFlags.Class &&
+                            !getBaseTypeVariableOfClass(symbol) &&
+                            !(symbol.valueDeclaration.kind === SyntaxKind.ClassExpression && flags & TypeFormatFlags.WriteClassExpressionAsTypeLiteral) ||
+                            symbol.flags & (SymbolFlags.Enum | SymbolFlags.ValueModule)) {
                             writeTypeOfSymbol(type, flags);
                         }
                         else if (shouldWriteTypeOfFunctionSymbol()) {
@@ -2321,12 +3387,23 @@ namespace ts {
                         else {
                             // Since instantiations of the same anonymous type have the same symbol, tracking symbols instead
                             // of types allows us to catch circular references to instantiations of the same anonymous type
+                            // However, in case of class expressions, we want to write both the static side and the instance side.
+                            // We skip adding the static side so that the instance side has a chance to be written
+                            // before checking for circular references.
                             if (!symbolStack) {
                                 symbolStack = [];
                             }
-                            symbolStack.push(symbol);
-                            writeLiteralType(type, flags);
-                            symbolStack.pop();
+                            const isConstructorObject = type.flags & TypeFlags.Object &&
+                                getObjectFlags(type) & ObjectFlags.Anonymous &&
+                                type.symbol && type.symbol.flags & SymbolFlags.Class;
+                            if (isConstructorObject) {
+                                writeLiteralType(type, flags);
+                            }
+                            else {
+                                symbolStack.push(symbol);
+                                writeLiteralType(type, flags);
+                                symbolStack.pop();
+                            }
                         }
                     }
                     else {
@@ -2355,26 +3432,6 @@ namespace ts {
                     buildSymbolDisplay(type.symbol, writer, enclosingDeclaration, SymbolFlags.Value, SymbolFormatFlags.None, typeFormatFlags);
                 }
 
-                function writeIndexSignature(info: IndexInfo, keyword: SyntaxKind) {
-                    if (info) {
-                        if (info.isReadonly) {
-                            writeKeyword(writer, SyntaxKind.ReadonlyKeyword);
-                            writeSpace(writer);
-                        }
-                        writePunctuation(writer, SyntaxKind.OpenBracketToken);
-                        writer.writeParameter(info.declaration ? declarationNameToString(info.declaration.parameters[0].name) : "x");
-                        writePunctuation(writer, SyntaxKind.ColonToken);
-                        writeSpace(writer);
-                        writeKeyword(writer, keyword);
-                        writePunctuation(writer, SyntaxKind.CloseBracketToken);
-                        writePunctuation(writer, SyntaxKind.ColonToken);
-                        writeSpace(writer);
-                        writeType(info.type, TypeFormatFlags.None);
-                        writePunctuation(writer, SyntaxKind.SemicolonToken);
-                        writer.writeLine();
-                    }
-                }
-
                 function writePropertyWithModifiers(prop: Symbol) {
                     if (isReadonlySymbol(prop)) {
                         writeKeyword(writer, SyntaxKind.ReadonlyKeyword);
@@ -2400,6 +3457,13 @@ namespace ts {
                 }
 
                 function writeLiteralType(type: ObjectType, flags: TypeFormatFlags) {
+                    if (type.objectFlags & ObjectFlags.Mapped) {
+                        if (getConstraintTypeFromMappedType(<MappedType>type).flags & (TypeFlags.TypeParameter | TypeFlags.Index)) {
+                            writeMappedType(<MappedType>type);
+                            return;
+                        }
+                    }
+
                     const resolved = resolveStructuredTypeMembers(type);
                     if (!resolved.properties.length && !resolved.stringIndexInfo && !resolved.numberIndexInfo) {
                         if (!resolved.callSignatures.length && !resolved.constructSignatures.length) {
@@ -2438,6 +3502,13 @@ namespace ts {
                     writePunctuation(writer, SyntaxKind.OpenBraceToken);
                     writer.writeLine();
                     writer.increaseIndent();
+                    writeObjectLiteralType(resolved);
+                    writer.decreaseIndent();
+                    writePunctuation(writer, SyntaxKind.CloseBraceToken);
+                    inObjectTypeLiteral = saveInObjectTypeLiteral;
+                }
+
+                function writeObjectLiteralType(resolved: ResolvedType) {
                     for (const signature of resolved.callSignatures) {
                         buildSignatureDisplay(signature, writer, enclosingDeclaration, globalFlagsToPass, /*kind*/ undefined, symbolStack);
                         writePunctuation(writer, SyntaxKind.SemicolonToken);
@@ -2448,9 +3519,17 @@ namespace ts {
                         writePunctuation(writer, SyntaxKind.SemicolonToken);
                         writer.writeLine();
                     }
-                    writeIndexSignature(resolved.stringIndexInfo, SyntaxKind.StringKeyword);
-                    writeIndexSignature(resolved.numberIndexInfo, SyntaxKind.NumberKeyword);
+                    buildIndexSignatureDisplay(resolved.stringIndexInfo, writer, IndexKind.String, enclosingDeclaration, globalFlags, symbolStack);
+                    buildIndexSignatureDisplay(resolved.numberIndexInfo, writer, IndexKind.Number, enclosingDeclaration, globalFlags, symbolStack);
                     for (const p of resolved.properties) {
+                        if (globalFlags & TypeFormatFlags.WriteClassExpressionAsTypeLiteral) {
+                            if (p.flags & SymbolFlags.Prototype) {
+                                continue;
+                            }
+                            if (getDeclarationModifierFlagsFromSymbol(p) & (ModifierFlags.Private | ModifierFlags.Protected)) {
+                                writer.reportPrivateInBaseOfClassExpression(p.name);
+                            }
+                        }
                         const t = getTypeOfSymbol(p);
                         if (p.flags & (SymbolFlags.Function | SymbolFlags.Method) && !getPropertiesOfObjectType(t).length) {
                             const signatures = getSignaturesOfType(t, SignatureKind.Call);
@@ -2465,14 +3544,38 @@ namespace ts {
                             writePropertyWithModifiers(p);
                             writePunctuation(writer, SyntaxKind.ColonToken);
                             writeSpace(writer);
-                            writeType(t, TypeFormatFlags.None);
+                            writeType(t, globalFlags & TypeFormatFlags.WriteClassExpressionAsTypeLiteral);
                             writePunctuation(writer, SyntaxKind.SemicolonToken);
                             writer.writeLine();
                         }
                     }
+                }
+
+                function writeMappedType(type: MappedType) {
+                    writePunctuation(writer, SyntaxKind.OpenBraceToken);
+                    writer.writeLine();
+                    writer.increaseIndent();
+                    if (type.declaration.readonlyToken) {
+                        writeKeyword(writer, SyntaxKind.ReadonlyKeyword);
+                        writeSpace(writer);
+                    }
+                    writePunctuation(writer, SyntaxKind.OpenBracketToken);
+                    appendSymbolNameOnly(getTypeParameterFromMappedType(type).symbol, writer);
+                    writeSpace(writer);
+                    writeKeyword(writer, SyntaxKind.InKeyword);
+                    writeSpace(writer);
+                    writeType(getConstraintTypeFromMappedType(type), TypeFormatFlags.None);
+                    writePunctuation(writer, SyntaxKind.CloseBracketToken);
+                    if (type.declaration.questionToken) {
+                        writePunctuation(writer, SyntaxKind.QuestionToken);
+                    }
+                    writePunctuation(writer, SyntaxKind.ColonToken);
+                    writeSpace(writer);
+                    writeType(getTemplateTypeFromMappedType(type), TypeFormatFlags.None);
+                    writePunctuation(writer, SyntaxKind.SemicolonToken);
+                    writer.writeLine();
                     writer.decreaseIndent();
                     writePunctuation(writer, SyntaxKind.CloseBraceToken);
-                    inObjectTypeLiteral = saveInObjectTypeLiteral;
                 }
             }
 
@@ -2492,26 +3595,37 @@ namespace ts {
                     writeSpace(writer);
                     buildTypeDisplay(constraint, writer, enclosingDeclaration, flags, symbolStack);
                 }
+                const defaultType = getDefaultFromTypeParameter(tp);
+                if (defaultType) {
+                    writeSpace(writer);
+                    writePunctuation(writer, SyntaxKind.EqualsToken);
+                    writeSpace(writer);
+                    buildTypeDisplay(defaultType, writer, enclosingDeclaration, flags, symbolStack);
+                }
             }
 
             function buildParameterDisplay(p: Symbol, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags, symbolStack?: Symbol[]) {
                 const parameterNode = <ParameterDeclaration>p.valueDeclaration;
-                if (isRestParameter(parameterNode)) {
+                if (parameterNode ? isRestParameter(parameterNode) : isTransientSymbol(p) && p.isRestParameter) {
                     writePunctuation(writer, SyntaxKind.DotDotDotToken);
                 }
-                if (isBindingPattern(parameterNode.name)) {
+                if (parameterNode && isBindingPattern(parameterNode.name)) {
                     buildBindingPatternDisplay(<BindingPattern>parameterNode.name, writer, enclosingDeclaration, flags, symbolStack);
                 }
                 else {
                     appendSymbolNameOnly(p, writer);
                 }
-                if (isOptionalParameter(parameterNode)) {
+                if (parameterNode && isOptionalParameter(parameterNode)) {
                     writePunctuation(writer, SyntaxKind.QuestionToken);
                 }
                 writePunctuation(writer, SyntaxKind.ColonToken);
                 writeSpace(writer);
 
-                buildTypeDisplay(getTypeOfSymbol(p), writer, enclosingDeclaration, flags, symbolStack);
+                let type = getTypeOfSymbol(p);
+                if (parameterNode && isRequiredInitializedParameter(parameterNode)) {
+                    type = getNullableType(type, TypeFlags.Undefined);
+                }
+                buildTypeDisplay(type, writer, enclosingDeclaration, flags, symbolStack);
             }
 
             function buildBindingPatternDisplay(bindingPattern: BindingPattern, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags, symbolStack?: Symbol[]) {
@@ -2538,7 +3652,7 @@ namespace ts {
                 }
                 Debug.assert(bindingElement.kind === SyntaxKind.BindingElement);
                 if (bindingElement.propertyName) {
-                    writer.writeSymbol(getTextOfNode(bindingElement.propertyName), bindingElement.symbol);
+                    writer.writeProperty(getTextOfNode(bindingElement.propertyName));
                     writePunctuation(writer, SyntaxKind.ColonToken);
                     writeSpace(writer);
                 }
@@ -2571,7 +3685,7 @@ namespace ts {
                 }
             }
 
-            function buildDisplayForTypeArgumentsAndDelimiters(typeParameters: TypeParameter[], mapper: TypeMapper, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags, symbolStack?: Symbol[]) {
+            function buildDisplayForTypeArgumentsAndDelimiters(typeParameters: TypeParameter[], mapper: TypeMapper, writer: SymbolWriter, enclosingDeclaration?: Node) {
                 if (typeParameters && typeParameters.length) {
                     writePunctuation(writer, SyntaxKind.LessThanToken);
                     let flags = TypeFormatFlags.InFirstTypeArgument;
@@ -2616,6 +3730,11 @@ namespace ts {
             }
 
             function buildReturnTypeDisplay(signature: Signature, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags, symbolStack?: Symbol[]) {
+                const returnType = getReturnTypeOfSignature(signature);
+                if (flags & TypeFormatFlags.SuppressAnyReturnType && isTypeAny(returnType)) {
+                    return;
+                }
+
                 if (flags & TypeFormatFlags.WriteArrowStyleSignature) {
                     writeSpace(writer);
                     writePunctuation(writer, SyntaxKind.EqualsGreaterThanToken);
@@ -2629,7 +3748,6 @@ namespace ts {
                     buildTypePredicateDisplay(signature.typePredicate, writer, enclosingDeclaration, flags, symbolStack);
                 }
                 else {
-                    const returnType = getReturnTypeOfSignature(signature);
                     buildTypeDisplay(returnType, writer, enclosingDeclaration, flags, symbolStack);
                 }
             }
@@ -2654,6 +3772,34 @@ namespace ts {
                 buildReturnTypeDisplay(signature, writer, enclosingDeclaration, flags, symbolStack);
             }
 
+            function buildIndexSignatureDisplay(info: IndexInfo, writer: SymbolWriter, kind: IndexKind, enclosingDeclaration?: Node, globalFlags?: TypeFormatFlags, symbolStack?: Symbol[]) {
+                if (info) {
+                    if (info.isReadonly) {
+                        writeKeyword(writer, SyntaxKind.ReadonlyKeyword);
+                        writeSpace(writer);
+                    }
+                    writePunctuation(writer, SyntaxKind.OpenBracketToken);
+                    writer.writeParameter(info.declaration ? declarationNameToString(info.declaration.parameters[0].name) : "x");
+                    writePunctuation(writer, SyntaxKind.ColonToken);
+                    writeSpace(writer);
+                    switch (kind) {
+                        case IndexKind.Number:
+                            writeKeyword(writer, SyntaxKind.NumberKeyword);
+                            break;
+                        case IndexKind.String:
+                            writeKeyword(writer, SyntaxKind.StringKeyword);
+                            break;
+                    }
+
+                    writePunctuation(writer, SyntaxKind.CloseBracketToken);
+                    writePunctuation(writer, SyntaxKind.ColonToken);
+                    writeSpace(writer);
+                    buildTypeDisplay(info.type, writer, enclosingDeclaration, globalFlags, symbolStack);
+                    writePunctuation(writer, SyntaxKind.SemicolonToken);
+                    writer.writeLine();
+                }
+            }
+
             return _displayBuilder || (_displayBuilder = {
                 buildSymbolDisplay,
                 buildTypeDisplay,
@@ -2664,6 +3810,7 @@ namespace ts {
                 buildDisplayForTypeParametersAndDelimiters,
                 buildTypeParameterDisplayFromSymbol,
                 buildSignatureDisplay,
+                buildIndexSignatureDisplay,
                 buildReturnTypeDisplay
             });
         }
@@ -2684,12 +3831,12 @@ namespace ts {
                     case SyntaxKind.BindingElement:
                         return isDeclarationVisible(<Declaration>node.parent.parent);
                     case SyntaxKind.VariableDeclaration:
-                        if (isBindingPattern(node.name) &&
-                            !(<BindingPattern>node.name).elements.length) {
+                        if (isBindingPattern((node as VariableDeclaration).name) &&
+                            !((node as VariableDeclaration).name as BindingPattern).elements.length) {
                             // If the binding pattern is empty, this variable declaration is not visible
                             return false;
                         }
-                    // Otherwise fall through
+                        // falls through
                     case SyntaxKind.ModuleDeclaration:
                     case SyntaxKind.ClassDeclaration:
                     case SyntaxKind.InterfaceDeclaration:
@@ -2720,7 +3867,8 @@ namespace ts {
                             // Private/protected properties/methods are not visible
                             return false;
                         }
-                    // Public properties/methods are visible if its parents are visible, so const it fall into next case statement
+                        // Public properties/methods are visible if its parents are visible, so:
+                        // falls through
 
                     case SyntaxKind.Constructor:
                     case SyntaxKind.ConstructSignature:
@@ -2769,10 +3917,7 @@ namespace ts {
                 exportSymbol = resolveName(node.parent, node.text, SymbolFlags.Value | SymbolFlags.Type | SymbolFlags.Namespace | SymbolFlags.Alias, Diagnostics.Cannot_find_name_0, node);
             }
             else if (node.parent.kind === SyntaxKind.ExportSpecifier) {
-                const exportSpecifier = <ExportSpecifier>node.parent;
-                exportSymbol = (<ExportDeclaration>exportSpecifier.parent.parent).moduleSpecifier ?
-                    getExternalModuleMember(<ExportDeclaration>exportSpecifier.parent.parent, exportSpecifier) :
-                    resolveEntityName(exportSpecifier.propertyName || exportSpecifier.name, SymbolFlags.Value | SymbolFlags.Type | SymbolFlags.Namespace | SymbolFlags.Alias);
+                exportSymbol = getTargetOfExportSpecifier(<ExportSpecifier>node.parent, SymbolFlags.Value | SymbolFlags.Type | SymbolFlags.Namespace | SymbolFlags.Alias);
             }
             const result: Node[] = [];
             if (exportSymbol) {
@@ -2850,7 +3995,6 @@ namespace ts {
                 return getSymbolLinks(<Symbol>target).declaredType;
             }
             if (propertyName === TypeSystemPropertyName.ResolvedBaseConstructorType) {
-                Debug.assert(!!((<Type>target).flags & TypeFlags.Class));
                 return (<InterfaceType>target).resolvedBaseConstructorType;
             }
             if (propertyName === TypeSystemPropertyName.ResolvedReturnType) {
@@ -2869,8 +4013,7 @@ namespace ts {
         }
 
         function getDeclarationContainer(node: Node): Node {
-            node = getRootDeclaration(node);
-            while (node) {
+            node = findAncestor(getRootDeclaration(node), node => {
                 switch (node.kind) {
                     case SyntaxKind.VariableDeclaration:
                     case SyntaxKind.VariableDeclarationList:
@@ -2878,13 +4021,12 @@ namespace ts {
                     case SyntaxKind.NamedImports:
                     case SyntaxKind.NamespaceImport:
                     case SyntaxKind.ImportClause:
-                        node = node.parent;
-                        break;
-
+                        return false;
                     default:
-                        return node.parent;
+                        return true;
                 }
-            }
+            });
+            return node && node.parent;
         }
 
         function getTypeOfPrototypeProperty(prototype: Symbol): Type {
@@ -2906,10 +4048,6 @@ namespace ts {
             return type && (type.flags & TypeFlags.Any) !== 0;
         }
 
-        function isTypeNever(type: Type) {
-            return type && (type.flags & TypeFlags.Never) !== 0;
-        }
-
         // Return the type of a binding element parent. We check SymbolLinks first to see if a type has been
         // assigned by contextual typing.
         function getTypeForBindingElementParent(node: VariableLikeDeclaration) {
@@ -2917,24 +4055,36 @@ namespace ts {
             return symbol && getSymbolLinks(symbol).type || getTypeForVariableLikeDeclaration(node, /*includeOptionality*/ false);
         }
 
-        function getTextOfPropertyName(name: PropertyName): string {
-            switch (name.kind) {
-                case SyntaxKind.Identifier:
-                    return (<Identifier>name).text;
-                case SyntaxKind.StringLiteral:
-                case SyntaxKind.NumericLiteral:
-                    return (<LiteralExpression>name).text;
-                case SyntaxKind.ComputedPropertyName:
-                    if (isStringOrNumericLiteral((<ComputedPropertyName>name).expression.kind)) {
-                        return (<LiteralExpression>(<ComputedPropertyName>name).expression).text;
-                    }
+        function isComputedNonLiteralName(name: PropertyName): boolean {
+            return name.kind === SyntaxKind.ComputedPropertyName && !isStringOrNumericLiteral((<ComputedPropertyName>name).expression);
+        }
+
+        function getRestType(source: Type, properties: PropertyName[], symbol: Symbol): Type {
+            source = filterType(source, t => !(t.flags & TypeFlags.Nullable));
+            if (source.flags & TypeFlags.Never) {
+                return emptyObjectType;
             }
 
-            return undefined;
-        }
+            if (source.flags & TypeFlags.Union) {
+                return mapType(source, t => getRestType(t, properties, symbol));
+            }
 
-        function isComputedNonLiteralName(name: PropertyName): boolean {
-            return name.kind === SyntaxKind.ComputedPropertyName && !isStringOrNumericLiteral((<ComputedPropertyName>name).expression.kind);
+            const members = createMap<Symbol>();
+            const names = createMap<true>();
+            for (const name of properties) {
+                names.set(getTextOfPropertyName(name), true);
+            }
+            for (const prop of getPropertiesOfType(source)) {
+                const inNamesToRemove = names.has(prop.name);
+                const isPrivate = getDeclarationModifierFlagsFromSymbol(prop) & (ModifierFlags.Private | ModifierFlags.Protected);
+                const isSetOnlyAccessor = prop.flags & SymbolFlags.SetAccessor && !(prop.flags & SymbolFlags.GetAccessor);
+                if (!inNamesToRemove && !isPrivate && !isClassMethod(prop) && !isSetOnlyAccessor) {
+                    members.set(prop.name, prop);
+                }
+            }
+            const stringIndexInfo = getIndexInfoOfType(source, IndexKind.String);
+            const numberIndexInfo = getIndexInfoOfType(source, IndexKind.Number);
+            return createAnonymousType(symbol, members, emptyArray, emptyArray, stringIndexInfo, numberIndexInfo);
         }
 
         /** Return the inferred type for a binding element */
@@ -2957,34 +4107,53 @@ namespace ts {
 
             let type: Type;
             if (pattern.kind === SyntaxKind.ObjectBindingPattern) {
-                // Use explicitly specified property name ({ p: xxx } form), or otherwise the implied name ({ p } form)
-                const name = declaration.propertyName || <Identifier>declaration.name;
-                if (isComputedNonLiteralName(name)) {
-                    // computed properties with non-literal names are treated as 'any'
-                    return anyType;
-                }
-                if (declaration.initializer) {
-                    getContextualType(declaration.initializer);
+                if (declaration.dotDotDotToken) {
+                    if (!isValidSpreadType(parentType)) {
+                        error(declaration, Diagnostics.Rest_types_may_only_be_created_from_object_types);
+                        return unknownType;
+                    }
+                    const literalMembers: PropertyName[] = [];
+                    for (const element of pattern.elements) {
+                        if (!(element as BindingElement).dotDotDotToken) {
+                            literalMembers.push(element.propertyName || element.name as Identifier);
+                        }
+                    }
+                    type = getRestType(parentType, literalMembers, declaration.symbol);
                 }
+                else {
+                    // Use explicitly specified property name ({ p: xxx } form), or otherwise the implied name ({ p } form)
+                    const name = declaration.propertyName || <Identifier>declaration.name;
+                    if (isComputedNonLiteralName(name)) {
+                        // computed properties with non-literal names are treated as 'any'
+                        return anyType;
+                    }
+                    if (declaration.initializer) {
+                        getContextualType(declaration.initializer);
+                    }
 
-                // Use type of the specified property, or otherwise, for a numeric name, the type of the numeric index signature,
-                // or otherwise the type of the string index signature.
-                const text = getTextOfPropertyName(name);
+                    // Use type of the specified property, or otherwise, for a numeric name, the type of the numeric index signature,
+                    // or otherwise the type of the string index signature.
+                    const text = getTextOfPropertyName(name);
 
-                type = getTypeOfPropertyOfType(parentType, text) ||
-                    isNumericLiteralName(text) && getIndexTypeOfType(parentType, IndexKind.Number) ||
-                    getIndexTypeOfType(parentType, IndexKind.String);
-                if (!type) {
-                    error(name, Diagnostics.Type_0_has_no_property_1_and_no_string_index_signature, typeToString(parentType), declarationNameToString(name));
-                    return unknownType;
+                    type = getTypeOfPropertyOfType(parentType, text) ||
+                        isNumericLiteralName(text) && getIndexTypeOfType(parentType, IndexKind.Number) ||
+                        getIndexTypeOfType(parentType, IndexKind.String);
+                    if (!type) {
+                        error(name, Diagnostics.Type_0_has_no_property_1_and_no_string_index_signature, typeToString(parentType), declarationNameToString(name));
+                        return unknownType;
+                    }
                 }
             }
             else {
                 // This elementType will be used if the specific property corresponding to this index is not
                 // present (aka the tuple element property). This call also checks that the parentType is in
                 // fact an iterable or array (depending on target language).
-                const elementType = checkIteratedTypeOrElementType(parentType, pattern, /*allowStringInput*/ false);
-                if (!declaration.dotDotDotToken) {
+                const elementType = checkIteratedTypeOrElementType(parentType, pattern, /*allowStringInput*/ false, /*allowAsyncIterables*/ false);
+                if (declaration.dotDotDotToken) {
+                    // Rest element has an array type with the same element type as the parent type
+                    type = createArrayType(elementType);
+                }
+                else {
                     // Use specific property type when parent is a tuple or numeric index type when parent is an array
                     const propName = "" + indexOf(pattern.elements, declaration);
                     type = isTupleLikeType(parentType)
@@ -3000,10 +4169,6 @@ namespace ts {
                         return unknownType;
                     }
                 }
-                else {
-                    // Rest element has an array type with the same element type as the parent type
-                    type = createArrayType(elementType);
-                }
             }
             // In strict null checking mode, if a default value of a non-undefined type is specified, remove
             // undefined from the final type.
@@ -3015,61 +4180,35 @@ namespace ts {
                 type;
         }
 
-        function getTypeForVariableLikeDeclarationFromJSDocComment(declaration: VariableLikeDeclaration) {
-            const jsDocType = getJSDocTypeForVariableLikeDeclarationFromJSDocComment(declaration);
-            if (jsDocType) {
-                return getTypeFromTypeNode(jsDocType);
+        function getTypeForDeclarationFromJSDocComment(declaration: Node) {
+            const jsdocType = getJSDocType(declaration);
+            if (jsdocType) {
+                return getTypeFromTypeNode(jsdocType);
             }
+            return undefined;
         }
 
-        function getJSDocTypeForVariableLikeDeclarationFromJSDocComment(declaration: VariableLikeDeclaration): JSDocType {
-            // First, see if this node has an @type annotation on it directly.
-            const typeTag = getJSDocTypeTag(declaration);
-            if (typeTag && typeTag.typeExpression) {
-                return typeTag.typeExpression.type;
-            }
-
-            if (declaration.kind === SyntaxKind.VariableDeclaration &&
-                declaration.parent.kind === SyntaxKind.VariableDeclarationList &&
-                declaration.parent.parent.kind === SyntaxKind.VariableStatement) {
-
-                // @type annotation might have been on the variable statement, try that instead.
-                const annotation = getJSDocTypeTag(declaration.parent.parent);
-                if (annotation && annotation.typeExpression) {
-                    return annotation.typeExpression.type;
-                }
-            }
-            else if (declaration.kind === SyntaxKind.Parameter) {
-                // If it's a parameter, see if the parent has a jsdoc comment with an @param
-                // annotation.
-                const paramTag = getCorrespondingJSDocParameterTag(<ParameterDeclaration>declaration);
-                if (paramTag && paramTag.typeExpression) {
-                    return paramTag.typeExpression.type;
-                }
-            }
+        function isNullOrUndefined(node: Expression) {
+            const expr = skipParentheses(node);
+            return expr.kind === SyntaxKind.NullKeyword || expr.kind === SyntaxKind.Identifier && getResolvedSymbol(<Identifier>expr) === undefinedSymbol;
+        }
 
-            return undefined;
+        function isEmptyArrayLiteral(node: Expression) {
+            const expr = skipParentheses(node);
+            return expr.kind === SyntaxKind.ArrayLiteralExpression && (<ArrayLiteralExpression>expr).elements.length === 0;
         }
 
         function addOptionality(type: Type, optional: boolean): Type {
-            return strictNullChecks && optional ? includeFalsyTypes(type, TypeFlags.Undefined) : type;
+            return strictNullChecks && optional ? getNullableType(type, TypeFlags.Undefined) : type;
         }
 
         // Return the inferred type for a variable, parameter, or property declaration
         function getTypeForVariableLikeDeclaration(declaration: VariableLikeDeclaration, includeOptionality: boolean): Type {
-            if (declaration.flags & NodeFlags.JavaScriptFile) {
-                // If this is a variable in a JavaScript file, then use the JSDoc type (if it has
-                // one as its type), otherwise fallback to the below standard TS codepaths to
-                // try to figure it out.
-                const type = getTypeForVariableLikeDeclarationFromJSDocComment(declaration);
-                if (type && type !== unknownType) {
-                    return type;
-                }
-            }
-
-            // A variable declared in a for..in statement is always of type string
+            // A variable declared in a for..in statement is of type string, or of type keyof T when the
+            // right hand expression is of a type parameter type.
             if (declaration.parent.parent.kind === SyntaxKind.ForInStatement) {
-                return stringType;
+                const indexType = getIndexType(checkNonNullExpression((<ForInStatement>declaration.parent.parent).expression));
+                return indexType.flags & (TypeFlags.TypeParameter | TypeFlags.Index) ? indexType : stringType;
             }
 
             if (declaration.parent.parent.kind === SyntaxKind.ForOfStatement) {
@@ -3077,7 +4216,8 @@ namespace ts {
                 // missing properties/signatures required to get its iteratedType (like
                 // [Symbol.iterator] or next). This may be because we accessed properties from anyType,
                 // or it may have led to an error inside getElementTypeOfIterable.
-                return checkRightHandSideOfForOf((<ForOfStatement>declaration.parent.parent).expression) || anyType;
+                const forOfStatement = <ForOfStatement>declaration.parent.parent;
+                return checkRightHandSideOfForOf(forOfStatement.expression, forOfStatement.awaitModifier) || anyType;
             }
 
             if (isBindingPattern(declaration.parent)) {
@@ -3085,15 +4225,33 @@ namespace ts {
             }
 
             // Use type from type annotation if one is present
-            if (declaration.type) {
-                return addOptionality(getTypeFromTypeNode(declaration.type), /*optional*/ declaration.questionToken && includeOptionality);
+            const typeNode = getEffectiveTypeAnnotationNode(declaration);
+            if (typeNode) {
+                const declaredType = getTypeFromTypeNode(typeNode);
+                return addOptionality(declaredType, /*optional*/ declaration.questionToken && includeOptionality);
+            }
+
+            if ((noImplicitAny || declaration.flags & NodeFlags.JavaScriptFile) &&
+                declaration.kind === SyntaxKind.VariableDeclaration && !isBindingPattern(declaration.name) &&
+                !(getCombinedModifierFlags(declaration) & ModifierFlags.Export) && !isInAmbientContext(declaration)) {
+                // If --noImplicitAny is on or the declaration is in a Javascript file,
+                // use control flow tracked 'any' type for non-ambient, non-exported var or let variables with no
+                // initializer or a 'null' or 'undefined' initializer.
+                if (!(getCombinedNodeFlags(declaration) & NodeFlags.Const) && (!declaration.initializer || isNullOrUndefined(declaration.initializer))) {
+                    return autoType;
+                }
+                // Use control flow tracked 'any[]' type for non-ambient, non-exported variables with an empty array
+                // literal initializer.
+                if (declaration.initializer && isEmptyArrayLiteral(declaration.initializer)) {
+                    return autoArrayType;
+                }
             }
 
             if (declaration.kind === SyntaxKind.Parameter) {
                 const func = <FunctionLikeDeclaration>declaration.parent;
                 // For a parameter of a set accessor, use the type of the get accessor if one is present
                 if (func.kind === SyntaxKind.SetAccessor && !hasDynamicName(func)) {
-                    const getter = <AccessorDeclaration>getDeclarationOfKind(declaration.parent.symbol, SyntaxKind.GetAccessor);
+                    const getter = getDeclarationOfKind<AccessorDeclaration>(declaration.parent.symbol, SyntaxKind.GetAccessor);
                     if (getter) {
                         const getterSignature = getSignatureFromDeclaration(getter);
                         const thisParameter = getAccessorThisParameter(func as AccessorDeclaration);
@@ -3108,8 +4266,7 @@ namespace ts {
                 // Use contextual parameter type if one is available
                 let type: Type;
                 if (declaration.symbol.name === "this") {
-                    const thisParameter = getContextualThisParameter(func);
-                    type = thisParameter ? getTypeOfSymbol(thisParameter) : undefined;
+                    type = getContextualThisParameterType(func);
                 }
                 else {
                     type = getContextuallyTypedParameterType(<ParameterDeclaration>declaration);
@@ -3125,6 +4282,12 @@ namespace ts {
                 return addOptionality(type, /*optional*/ declaration.questionToken && includeOptionality);
             }
 
+            if (isJsxAttribute(declaration)) {
+                // if JSX attribute doesn't have initializer, by default the attribute will have boolean value of true.
+                // I.e <Elem attr /> is sugar for <Elem attr={true} />
+                return trueType;
+            }
+
             // If it is a short-hand property assignment, use the type of the identifier
             if (declaration.kind === SyntaxKind.ShorthandPropertyAssignment) {
                 return checkIdentifier(<Identifier>declaration.name);
@@ -3139,6 +4302,51 @@ namespace ts {
             return undefined;
         }
 
+        function getWidenedTypeFromJSSpecialPropertyDeclarations(symbol: Symbol) {
+            const types: Type[] = [];
+            let definedInConstructor = false;
+            let definedInMethod = false;
+            let jsDocType: Type;
+            for (const declaration of symbol.declarations) {
+                const expression = declaration.kind === SyntaxKind.BinaryExpression ? <BinaryExpression>declaration :
+                    declaration.kind === SyntaxKind.PropertyAccessExpression ? <BinaryExpression>getAncestor(declaration, SyntaxKind.BinaryExpression) :
+                        undefined;
+
+                if (!expression) {
+                    return unknownType;
+                }
+
+                if (isPropertyAccessExpression(expression.left) && expression.left.expression.kind === SyntaxKind.ThisKeyword) {
+                    if (getThisContainer(expression, /*includeArrowFunctions*/ false).kind === SyntaxKind.Constructor) {
+                        definedInConstructor = true;
+                    }
+                    else {
+                        definedInMethod = true;
+                    }
+                }
+
+                // If there is a JSDoc type, use it
+                const type = getTypeForDeclarationFromJSDocComment(expression.parent);
+                if (type) {
+                    const declarationType = getWidenedType(type);
+                    if (!jsDocType) {
+                        jsDocType = declarationType;
+                    }
+                    else if (jsDocType !== unknownType && declarationType !== unknownType && !isTypeIdenticalTo(jsDocType, declarationType)) {
+                        const name = getNameOfDeclaration(declaration);
+                        error(name, Diagnostics.Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_type_2, declarationNameToString(name), typeToString(jsDocType), typeToString(declarationType));
+                    }
+                }
+                else if (!jsDocType) {
+                    // If we don't have an explicit JSDoc type, get the type from the expression.
+                    types.push(getWidenedLiteralType(checkExpressionCached(expression.right)));
+                }
+            }
+
+            const type = jsDocType || getUnionType(types, /*subtypeReduction*/ true);
+            return getWidenedType(addOptionality(type, definedInMethod && !definedInConstructor));
+        }
+
         // Return the type implied by a binding pattern element. This is the type of the initializer of the element if
         // one is present. Otherwise, if the element is itself a binding pattern, it is the type implied by the binding
         // pattern. Otherwise, it is the type any.
@@ -3149,7 +4357,7 @@ namespace ts {
             if (isBindingPattern(element.name)) {
                 return getTypeFromBindingPattern(<BindingPattern>element.name, includePatternInType, reportErrors);
             }
-            if (reportErrors && compilerOptions.noImplicitAny && !declarationBelongsToPrivateAmbientMember(element)) {
+            if (reportErrors && noImplicitAny && !declarationBelongsToPrivateAmbientMember(element)) {
                 reportImplicitAnyError(element, anyType);
             }
             return anyType;
@@ -3158,6 +4366,7 @@ namespace ts {
         // Return the type implied by an object binding pattern
         function getTypeFromObjectBindingPattern(pattern: ObjectBindingPattern, includePatternInType: boolean, reportErrors: boolean): Type {
             const members = createMap<Symbol>();
+            let stringIndexInfo: IndexInfo;
             let hasComputedProperties = false;
             forEach(pattern.elements, e => {
                 const name = e.propertyName || <Identifier>e.name;
@@ -3166,20 +4375,24 @@ namespace ts {
                     hasComputedProperties = true;
                     return;
                 }
+                if (e.dotDotDotToken) {
+                    stringIndexInfo = createIndexInfo(anyType, /*isReadonly*/ false);
+                    return;
+                }
 
                 const text = getTextOfPropertyName(name);
-                const flags = SymbolFlags.Property | SymbolFlags.Transient | (e.initializer ? SymbolFlags.Optional : 0);
-                const symbol = <TransientSymbol>createSymbol(flags, text);
+                const flags = SymbolFlags.Property | (e.initializer ? SymbolFlags.Optional : 0);
+                const symbol = createSymbol(flags, text);
                 symbol.type = getTypeFromBindingElement(e, includePatternInType, reportErrors);
                 symbol.bindingElement = e;
-                members[symbol.name] = symbol;
+                members.set(symbol.name, symbol);
             });
-            const result = createAnonymousType(undefined, members, emptyArray, emptyArray, undefined, undefined);
+            const result = createAnonymousType(undefined, members, emptyArray, emptyArray, stringIndexInfo, undefined);
             if (includePatternInType) {
                 result.pattern = pattern;
             }
             if (hasComputedProperties) {
-                result.flags |= TypeFlags.ObjectLiteralPatternWithComputedProperties;
+                result.objectFlags |= ObjectFlags.ObjectLiteralPatternWithComputedProperties;
             }
             return result;
         }
@@ -3189,7 +4402,7 @@ namespace ts {
             const elements = pattern.elements;
             const lastElement = lastOrUndefined(elements);
             if (elements.length === 0 || (!isOmittedExpression(lastElement) && lastElement.dotDotDotToken)) {
-                return languageVersion >= ScriptTarget.ES6 ? createIterableType(anyType) : anyArrayType;
+                return languageVersion >= ScriptTarget.ES2015 ? createIterableType(anyType) : anyArrayType;
             }
             // If the pattern has at least one element, and no rest element, then it should imply a tuple type.
             const elementTypes = map(elements, e => isOmittedExpression(e) ? anyType : getTypeFromBindingElement(e, includePatternInType, reportErrors));
@@ -3242,7 +4455,7 @@ namespace ts {
             type = declaration.dotDotDotToken ? anyArrayType : anyType;
 
             // Report implicit any errors unless this is a private property within an ambient declaration
-            if (reportErrors && compilerOptions.noImplicitAny) {
+            if (reportErrors && noImplicitAny) {
                 if (!declarationBelongsToPrivateAmbientMember(declaration)) {
                     reportImplicitAnyError(declaration, type);
                 }
@@ -3265,7 +4478,7 @@ namespace ts {
                 }
                 // Handle catch clause variables
                 const declaration = symbol.valueDeclaration;
-                if (declaration.parent.kind === SyntaxKind.CatchClause) {
+                if (isCatchClauseVariableDeclarationOrBindingElement(declaration)) {
                     return links.type = anyType;
                 }
                 // Handle export default expressions
@@ -3288,38 +4501,14 @@ namespace ts {
                 // * className.prototype.method = expr
                 if (declaration.kind === SyntaxKind.BinaryExpression ||
                     declaration.kind === SyntaxKind.PropertyAccessExpression && declaration.parent.kind === SyntaxKind.BinaryExpression) {
-                    // Use JS Doc type if present on parent expression statement
-                    if (declaration.flags & NodeFlags.JavaScriptFile) {
-                        const typeTag = getJSDocTypeTag(declaration.parent);
-                        if (typeTag && typeTag.typeExpression) {
-                            return links.type = getTypeFromTypeNode(typeTag.typeExpression.type);
-                        }
-                    }
-                    const declaredTypes = map(symbol.declarations,
-                        decl => decl.kind === SyntaxKind.BinaryExpression ?
-                            checkExpressionCached((<BinaryExpression>decl).right) :
-                            checkExpressionCached((<BinaryExpression>decl.parent).right));
-                    type = getUnionType(declaredTypes, /*subtypeReduction*/ true);
+                    type = getWidenedTypeFromJSSpecialPropertyDeclarations(symbol);
                 }
                 else {
                     type = getWidenedTypeForVariableLikeDeclaration(<VariableLikeDeclaration>declaration, /*reportErrors*/ true);
                 }
 
                 if (!popTypeResolution()) {
-                    if ((<VariableLikeDeclaration>symbol.valueDeclaration).type) {
-                        // Variable has type annotation that circularly references the variable itself
-                        type = unknownType;
-                        error(symbol.valueDeclaration, Diagnostics._0_is_referenced_directly_or_indirectly_in_its_own_type_annotation,
-                            symbolToString(symbol));
-                    }
-                    else {
-                        // Variable has initializer that circularly references the variable itself
-                        type = anyType;
-                        if (compilerOptions.noImplicitAny) {
-                            error(symbol.valueDeclaration, Diagnostics._0_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_and_is_referenced_directly_or_indirectly_in_its_own_initializer,
-                                symbolToString(symbol));
-                        }
-                    }
+                    type = reportCircularityError(symbol);
                 }
                 links.type = type;
             }
@@ -3329,10 +4518,11 @@ namespace ts {
         function getAnnotatedAccessorType(accessor: AccessorDeclaration): Type {
             if (accessor) {
                 if (accessor.kind === SyntaxKind.GetAccessor) {
-                    return accessor.type && getTypeFromTypeNode(accessor.type);
+                    const getterTypeAnnotation = getEffectiveReturnTypeNode(accessor);
+                    return getterTypeAnnotation && getTypeFromTypeNode(getterTypeAnnotation);
                 }
                 else {
-                    const setterTypeAnnotation = getSetAccessorTypeAnnotationNode(accessor);
+                    const setterTypeAnnotation = getEffectiveSetAccessorTypeAnnotationNode(accessor);
                     return setterTypeAnnotation && getTypeFromTypeNode(setterTypeAnnotation);
                 }
             }
@@ -3351,11 +4541,11 @@ namespace ts {
         function getTypeOfAccessors(symbol: Symbol): Type {
             const links = getSymbolLinks(symbol);
             if (!links.type) {
-                const getter = <AccessorDeclaration>getDeclarationOfKind(symbol, SyntaxKind.GetAccessor);
-                const setter = <AccessorDeclaration>getDeclarationOfKind(symbol, SyntaxKind.SetAccessor);
+                const getter = getDeclarationOfKind<AccessorDeclaration>(symbol, SyntaxKind.GetAccessor);
+                const setter = getDeclarationOfKind<AccessorDeclaration>(symbol, SyntaxKind.SetAccessor);
 
                 if (getter && getter.flags & NodeFlags.JavaScriptFile) {
-                    const jsDocType = getTypeForVariableLikeDeclarationFromJSDocComment(getter);
+                    const jsDocType = getTypeForDeclarationFromJSDocComment(getter);
                     if (jsDocType) {
                         return links.type = jsDocType;
                     }
@@ -3385,7 +4575,7 @@ namespace ts {
                         }
                         // Otherwise, fall back to 'any'.
                         else {
-                            if (compilerOptions.noImplicitAny) {
+                            if (noImplicitAny) {
                                 if (setter) {
                                     error(setter, Diagnostics.Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_parameter_type_annotation, symbolToString(symbol));
                                 }
@@ -3400,8 +4590,8 @@ namespace ts {
                 }
                 if (!popTypeResolution()) {
                     type = anyType;
-                    if (compilerOptions.noImplicitAny) {
-                        const getter = <AccessorDeclaration>getDeclarationOfKind(symbol, SyntaxKind.GetAccessor);
+                    if (noImplicitAny) {
+                        const getter = getDeclarationOfKind<AccessorDeclaration>(symbol, SyntaxKind.GetAccessor);
                         error(getter, Diagnostics._0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions, symbolToString(symbol));
                     }
                 }
@@ -3410,16 +4600,26 @@ namespace ts {
             return links.type;
         }
 
+        function getBaseTypeVariableOfClass(symbol: Symbol) {
+            const baseConstructorType = getBaseConstructorTypeOfClass(getDeclaredTypeOfClassOrInterface(symbol));
+            return baseConstructorType.flags & TypeFlags.TypeVariable ? baseConstructorType : undefined;
+        }
+
         function getTypeOfFuncClassEnumModule(symbol: Symbol): Type {
             const links = getSymbolLinks(symbol);
             if (!links.type) {
-                if (symbol.valueDeclaration.kind === SyntaxKind.ModuleDeclaration && isShorthandAmbientModuleSymbol(symbol)) {
+                if (symbol.flags & SymbolFlags.Module && isShorthandAmbientModuleSymbol(symbol)) {
                     links.type = anyType;
                 }
                 else {
-                    const type = createObjectType(TypeFlags.Anonymous, symbol);
-                    links.type = strictNullChecks && symbol.flags & SymbolFlags.Optional ?
-                        includeFalsyTypes(type, TypeFlags.Undefined) : type;
+                    const type = createObjectType(ObjectFlags.Anonymous, symbol);
+                    if (symbol.flags & SymbolFlags.Class) {
+                        const baseTypeVariable = getBaseTypeVariableOfClass(symbol);
+                        links.type = baseTypeVariable ? getIntersectionType([type, baseTypeVariable]) : type;
+                    }
+                    else {
+                        links.type = strictNullChecks && symbol.flags & SymbolFlags.Optional ? getNullableType(type, TypeFlags.Undefined) : type;
+                    }
                 }
             }
             return links.type;
@@ -3453,13 +4653,43 @@ namespace ts {
         function getTypeOfInstantiatedSymbol(symbol: Symbol): Type {
             const links = getSymbolLinks(symbol);
             if (!links.type) {
-                links.type = instantiateType(getTypeOfSymbol(links.target), links.mapper);
+                if (symbolInstantiationDepth === 100) {
+                    error(symbol.valueDeclaration, Diagnostics.Generic_type_instantiation_is_excessively_deep_and_possibly_infinite);
+                    links.type = unknownType;
+                }
+                else {
+                    if (!pushTypeResolution(symbol, TypeSystemPropertyName.Type)) {
+                        return unknownType;
+                    }
+                    symbolInstantiationDepth++;
+                    let type = instantiateType(getTypeOfSymbol(links.target), links.mapper);
+                    symbolInstantiationDepth--;
+                    if (!popTypeResolution()) {
+                        type = reportCircularityError(symbol);
+                    }
+                    links.type = type;
+                }
             }
             return links.type;
         }
 
+        function reportCircularityError(symbol: Symbol) {
+            // Check if variable has type annotation that circularly references the variable itself
+            if (getEffectiveTypeAnnotationNode(<VariableLikeDeclaration>symbol.valueDeclaration)) {
+                error(symbol.valueDeclaration, Diagnostics._0_is_referenced_directly_or_indirectly_in_its_own_type_annotation,
+                    symbolToString(symbol));
+                return unknownType;
+            }
+            // Otherwise variable has initializer that circularly references the variable itself
+            if (noImplicitAny) {
+                error(symbol.valueDeclaration, Diagnostics._0_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_and_is_referenced_directly_or_indirectly_in_its_own_initializer,
+                    symbolToString(symbol));
+            }
+            return anyType;
+        }
+
         function getTypeOfSymbol(symbol: Symbol): Type {
-            if (symbol.flags & SymbolFlags.Instantiated) {
+            if (getCheckFlags(symbol) & CheckFlags.Instantiated) {
                 return getTypeOfInstantiatedSymbol(symbol);
             }
             if (symbol.flags & (SymbolFlags.Variable | SymbolFlags.Property)) {
@@ -3480,15 +4710,27 @@ namespace ts {
             return unknownType;
         }
 
-        function getTargetType(type: ObjectType): Type {
-            return type.flags & TypeFlags.Reference ? (<TypeReference>type).target : type;
+        function isReferenceToType(type: Type, target: Type) {
+            return type !== undefined
+                && target !== undefined
+                && (getObjectFlags(type) & ObjectFlags.Reference) !== 0
+                && (<TypeReference>type).target === target;
         }
 
-        function hasBaseType(type: InterfaceType, checkBase: InterfaceType) {
+        function getTargetType(type: Type): Type {
+            return getObjectFlags(type) & ObjectFlags.Reference ? (<TypeReference>type).target : type;
+        }
+
+        function hasBaseType(type: Type, checkBase: Type) {
             return check(type);
-            function check(type: InterfaceType): boolean {
-                const target = <InterfaceType>getTargetType(type);
-                return target === checkBase || forEach(getBaseTypes(target), check);
+            function check(type: Type): boolean {
+                if (getObjectFlags(type) & (ObjectFlags.ClassOrInterface | ObjectFlags.Reference)) {
+                    const target = <InterfaceType>getTargetType(type);
+                    return target === checkBase || forEach(getBaseTypes(target), check);
+                }
+                else if (type.flags & TypeFlags.Intersection) {
+                    return forEach((<IntersectionType>type).types, check);
+                }
             }
         }
 
@@ -3531,7 +4773,7 @@ namespace ts {
         // The outer type parameters are those defined by enclosing generic classes, methods, or functions.
         function getOuterTypeParametersOfClassOrInterface(symbol: Symbol): TypeParameter[] {
             const declaration = symbol.flags & SymbolFlags.Class ? symbol.valueDeclaration : getDeclarationOfKind(symbol, SyntaxKind.InterfaceDeclaration);
-            return appendOuterTypeParameters(undefined, declaration);
+            return appendOuterTypeParameters(/*typeParameters*/ undefined, declaration);
         }
 
         // The local type parameters are the combined set of type parameters from all declarations of the class,
@@ -3556,35 +4798,54 @@ namespace ts {
             return concatenate(getOuterTypeParametersOfClassOrInterface(symbol), getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol));
         }
 
+        // A type is a mixin constructor if it has a single construct signature taking no type parameters and a single
+        // rest parameter of type any[].
+        function isMixinConstructorType(type: Type) {
+            const signatures = getSignaturesOfType(type, SignatureKind.Construct);
+            if (signatures.length === 1) {
+                const s = signatures[0];
+                return !s.typeParameters && s.parameters.length === 1 && s.hasRestParameter && getTypeOfParameter(s.parameters[0]) === anyArrayType;
+            }
+            return false;
+        }
+
         function isConstructorType(type: Type): boolean {
-            return type.flags & TypeFlags.ObjectType && getSignaturesOfType(type, SignatureKind.Construct).length > 0;
+            if (isValidBaseType(type) && getSignaturesOfType(type, SignatureKind.Construct).length > 0) {
+                return true;
+            }
+            if (type.flags & TypeFlags.TypeVariable) {
+                const constraint = getBaseConstraintOfType(type);
+                return constraint && isValidBaseType(constraint) && isMixinConstructorType(constraint);
+            }
+            return false;
         }
 
         function getBaseTypeNodeOfClass(type: InterfaceType): ExpressionWithTypeArguments {
             return getClassExtendsHeritageClauseElement(<ClassLikeDeclaration>type.symbol.valueDeclaration);
         }
 
-        function getConstructorsForTypeArguments(type: ObjectType, typeArgumentNodes: TypeNode[]): Signature[] {
-            const typeArgCount = typeArgumentNodes ? typeArgumentNodes.length : 0;
+        function getConstructorsForTypeArguments(type: Type, typeArgumentNodes: TypeNode[], location: Node): Signature[] {
+            const typeArgCount = length(typeArgumentNodes);
+            const isJavaScript = isInJavaScriptFile(location);
             return filter(getSignaturesOfType(type, SignatureKind.Construct),
-                sig => (sig.typeParameters ? sig.typeParameters.length : 0) === typeArgCount);
+                sig => (isJavaScript || typeArgCount >= getMinTypeArgumentCount(sig.typeParameters)) && typeArgCount <= length(sig.typeParameters));
         }
 
-        function getInstantiatedConstructorsForTypeArguments(type: ObjectType, typeArgumentNodes: TypeNode[]): Signature[] {
-            let signatures = getConstructorsForTypeArguments(type, typeArgumentNodes);
-            if (typeArgumentNodes) {
-                const typeArguments = map(typeArgumentNodes, getTypeFromTypeNodeNoAlias);
-                signatures = map(signatures, sig => getSignatureInstantiation(sig, typeArguments));
-            }
-            return signatures;
+        function getInstantiatedConstructorsForTypeArguments(type: Type, typeArgumentNodes: TypeNode[], location: Node): Signature[] {
+            const signatures = getConstructorsForTypeArguments(type, typeArgumentNodes, location);
+            const typeArguments = map(typeArgumentNodes, getTypeFromTypeNode);
+            return sameMap(signatures, sig => some(sig.typeParameters) ? getSignatureInstantiation(sig, typeArguments) : sig);
         }
 
-        // The base constructor of a class can resolve to
-        // undefinedType if the class has no extends clause,
-        // unknownType if an error occurred during resolution of the extends expression,
-        // nullType if the extends expression is the null value, or
-        // an object type with at least one construct signature.
-        function getBaseConstructorTypeOfClass(type: InterfaceType): ObjectType {
+        /**
+         * The base constructor of a class can resolve to
+         * * undefinedType if the class has no extends clause,
+         * * unknownType if an error occurred during resolution of the extends expression,
+         * * nullType if the extends expression is the null value,
+         * * anyType if the extends expression has type any, or
+         * * an object type with at least one construct signature.
+         */
+        function getBaseConstructorTypeOfClass(type: InterfaceType): Type {
             if (!type.resolvedBaseConstructorType) {
                 const baseTypeNode = getBaseTypeNodeOfClass(type);
                 if (!baseTypeNode) {
@@ -3594,16 +4855,16 @@ namespace ts {
                     return unknownType;
                 }
                 const baseConstructorType = checkExpression(baseTypeNode.expression);
-                if (baseConstructorType.flags & TypeFlags.ObjectType) {
+                if (baseConstructorType.flags & (TypeFlags.Object | TypeFlags.Intersection)) {
                     // Resolving the members of a class requires us to resolve the base class of that class.
                     // We force resolution here such that we catch circularities now.
-                    resolveStructuredTypeMembers(baseConstructorType);
+                    resolveStructuredTypeMembers(<ObjectType>baseConstructorType);
                 }
                 if (!popTypeResolution()) {
                     error(type.symbol.valueDeclaration, Diagnostics._0_is_referenced_directly_or_indirectly_in_its_own_base_expression, symbolToString(type.symbol));
                     return type.resolvedBaseConstructorType = unknownType;
                 }
-                if (baseConstructorType !== unknownType && baseConstructorType !== nullWideningType && !isConstructorType(baseConstructorType)) {
+                if (!(baseConstructorType.flags & TypeFlags.Any) && baseConstructorType !== nullWideningType && !isConstructorType(baseConstructorType)) {
                     error(baseTypeNode.expression, Diagnostics.Type_0_is_not_a_constructor_function_type, typeToString(baseConstructorType));
                     return type.resolvedBaseConstructorType = unknownType;
                 }
@@ -3612,9 +4873,9 @@ namespace ts {
             return type.resolvedBaseConstructorType;
         }
 
-        function getBaseTypes(type: InterfaceType): ObjectType[] {
+        function getBaseTypes(type: InterfaceType): BaseType[] {
             if (!type.resolvedBaseTypes) {
-                if (type.flags & TypeFlags.Tuple) {
+                if (type.objectFlags & ObjectFlags.Tuple) {
                     type.resolvedBaseTypes = [createArrayType(getUnionType(type.typeParameters))];
                 }
                 else if (type.symbol.flags & (SymbolFlags.Class | SymbolFlags.Interface)) {
@@ -3634,11 +4895,12 @@ namespace ts {
 
         function resolveBaseTypesOfClass(type: InterfaceType): void {
             type.resolvedBaseTypes = type.resolvedBaseTypes || emptyArray;
-            const baseConstructorType = getBaseConstructorTypeOfClass(type);
-            if (!(baseConstructorType.flags & TypeFlags.ObjectType)) {
+            const baseConstructorType = getApparentType(getBaseConstructorTypeOfClass(type));
+            if (!(baseConstructorType.flags & (TypeFlags.Object | TypeFlags.Intersection | TypeFlags.Any))) {
                 return;
             }
             const baseTypeNode = getBaseTypeNodeOfClass(type);
+            const typeArgs = typeArgumentsFromTypeReferenceNode(baseTypeNode);
             let baseType: Type;
             const originalBaseType = baseConstructorType && baseConstructorType.symbol ? getDeclaredTypeOfSymbol(baseConstructorType.symbol) : undefined;
             if (baseConstructorType.symbol && baseConstructorType.symbol.flags & SymbolFlags.Class &&
@@ -3646,36 +4908,49 @@ namespace ts {
                 // When base constructor type is a class with no captured type arguments we know that the constructors all have the same type parameters as the
                 // class and all return the instance type of the class. There is no need for further checks and we can apply the
                 // type arguments in the same manner as a type reference to get the same error reporting experience.
-                baseType = getTypeFromClassOrInterfaceReference(baseTypeNode, baseConstructorType.symbol);
+                baseType = getTypeFromClassOrInterfaceReference(baseTypeNode, baseConstructorType.symbol, typeArgs);
+            }
+            else if (baseConstructorType.flags & TypeFlags.Any) {
+                baseType = baseConstructorType;
             }
             else {
                 // The class derives from a "class-like" constructor function, check that we have at least one construct signature
                 // with a matching number of type parameters and use the return type of the first instantiated signature. Elsewhere
                 // we check that all instantiated signatures return the same type.
-                const constructors = getInstantiatedConstructorsForTypeArguments(baseConstructorType, baseTypeNode.typeArguments);
+                const constructors = getInstantiatedConstructorsForTypeArguments(baseConstructorType, baseTypeNode.typeArguments, baseTypeNode);
                 if (!constructors.length) {
                     error(baseTypeNode.expression, Diagnostics.No_base_constructor_has_the_specified_number_of_type_arguments);
                     return;
                 }
                 baseType = getReturnTypeOfSignature(constructors[0]);
             }
+
+            // In a JS file, you can use the @augments jsdoc tag to specify a base type with type parameters
+            const valueDecl = type.symbol.valueDeclaration;
+            if (valueDecl && isInJavaScriptFile(valueDecl)) {
+                const augTag = getJSDocAugmentsTag(type.symbol.valueDeclaration);
+                if (augTag) {
+                    baseType = getTypeFromTypeNode(augTag.typeExpression.type);
+                }
+            }
+
             if (baseType === unknownType) {
                 return;
             }
-            if (!(getTargetType(baseType).flags & (TypeFlags.Class | TypeFlags.Interface))) {
+            if (!isValidBaseType(baseType)) {
                 error(baseTypeNode.expression, Diagnostics.Base_constructor_return_type_0_is_not_a_class_or_interface_type, typeToString(baseType));
                 return;
             }
-            if (type === baseType || hasBaseType(<InterfaceType>baseType, type)) {
-                error(type.symbol.valueDeclaration, Diagnostics.Type_0_recursively_references_itself_as_a_base_type,
+            if (type === baseType || hasBaseType(<BaseType>baseType, type)) {
+                error(valueDecl, Diagnostics.Type_0_recursively_references_itself_as_a_base_type,
                     typeToString(type, /*enclosingDeclaration*/ undefined, TypeFormatFlags.WriteArrayAsGenericType));
                 return;
             }
             if (type.resolvedBaseTypes === emptyArray) {
-                type.resolvedBaseTypes = [baseType];
+                type.resolvedBaseTypes = [<ObjectType>baseType];
             }
             else {
-                type.resolvedBaseTypes.push(baseType);
+                type.resolvedBaseTypes.push(<ObjectType>baseType);
             }
         }
 
@@ -3691,6 +4966,13 @@ namespace ts {
             return true;
         }
 
+        // A valid base type is `any`, any non-generic object type or intersection of non-generic
+        // object types.
+        function isValidBaseType(type: Type): boolean {
+            return type.flags & (TypeFlags.Object | TypeFlags.NonPrimitive | TypeFlags.Any) && !isGenericMappedType(type) ||
+                type.flags & TypeFlags.Intersection && !forEach((<IntersectionType>type).types, t => !isValidBaseType(t));
+        }
+
         function resolveBaseTypesOfInterface(type: InterfaceType): void {
             type.resolvedBaseTypes = type.resolvedBaseTypes || emptyArray;
             for (const declaration of type.symbol.declarations) {
@@ -3698,13 +4980,13 @@ namespace ts {
                     for (const node of getInterfaceBaseTypeNodes(<InterfaceDeclaration>declaration)) {
                         const baseType = getTypeFromTypeNode(node);
                         if (baseType !== unknownType) {
-                            if (getTargetType(baseType).flags & (TypeFlags.Class | TypeFlags.Interface)) {
-                                if (type !== baseType && !hasBaseType(<InterfaceType>baseType, type)) {
+                            if (isValidBaseType(baseType)) {
+                                if (type !== baseType && !hasBaseType(<BaseType>baseType, type)) {
                                     if (type.resolvedBaseTypes === emptyArray) {
-                                        type.resolvedBaseTypes = [baseType];
+                                        type.resolvedBaseTypes = [<ObjectType>baseType];
                                     }
                                     else {
-                                        type.resolvedBaseTypes.push(baseType);
+                                        type.resolvedBaseTypes.push(<ObjectType>baseType);
                                     }
                                 }
                                 else {
@@ -3748,7 +5030,7 @@ namespace ts {
         function getDeclaredTypeOfClassOrInterface(symbol: Symbol): InterfaceType {
             const links = getSymbolLinks(symbol);
             if (!links.declaredType) {
-                const kind = symbol.flags & SymbolFlags.Class ? TypeFlags.Class : TypeFlags.Interface;
+                const kind = symbol.flags & SymbolFlags.Class ? ObjectFlags.Class : ObjectFlags.Interface;
                 const type = links.declaredType = <InterfaceType>createObjectType(kind, symbol);
                 const outerTypeParameters = getOuterTypeParametersOfClassOrInterface(symbol);
                 const localTypeParameters = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol);
@@ -3757,16 +5039,17 @@ namespace ts {
                 // property types inferred from initializers and method return types inferred from return statements are very hard
                 // to exhaustively analyze). We give interfaces a "this" type if we can't definitely determine that they are free of
                 // "this" references.
-                if (outerTypeParameters || localTypeParameters || kind === TypeFlags.Class || !isIndependentInterface(symbol)) {
-                    type.flags |= TypeFlags.Reference;
+                if (outerTypeParameters || localTypeParameters || kind === ObjectFlags.Class || !isIndependentInterface(symbol)) {
+                    type.objectFlags |= ObjectFlags.Reference;
                     type.typeParameters = concatenate(outerTypeParameters, localTypeParameters);
                     type.outerTypeParameters = outerTypeParameters;
                     type.localTypeParameters = localTypeParameters;
                     (<GenericType>type).instantiations = createMap<TypeReference>();
-                    (<GenericType>type).instantiations[getTypeListId(type.typeParameters)] = <GenericType>type;
+                    (<GenericType>type).instantiations.set(getTypeListId(type.typeParameters), <GenericType>type);
                     (<GenericType>type).target = <GenericType>type;
                     (<GenericType>type).typeArguments = type.typeParameters;
-                    type.thisType = <TypeParameter>createType(TypeFlags.TypeParameter | TypeFlags.ThisType);
+                    type.thisType = <TypeParameter>createType(TypeFlags.TypeParameter);
+                    type.thisType.isThisType = true;
                     type.thisType.symbol = symbol;
                     type.thisType.constraint = type;
                 }
@@ -3783,8 +5066,7 @@ namespace ts {
                     return unknownType;
                 }
 
-                const typeParameters = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol);
-                let declaration: JSDocTypedefTag | TypeAliasDeclaration = <JSDocTypedefTag>getDeclarationOfKind(symbol, SyntaxKind.JSDocTypedefTag);
+                let declaration: JSDocTypedefTag | TypeAliasDeclaration = getDeclarationOfKind<JSDocTypedefTag>(symbol, SyntaxKind.JSDocTypedefTag);
                 let type: Type;
                 if (declaration) {
                     if (declaration.jsDocTypeLiteral) {
@@ -3795,17 +5077,18 @@ namespace ts {
                     }
                 }
                 else {
-                    declaration = <TypeAliasDeclaration>getDeclarationOfKind(symbol, SyntaxKind.TypeAliasDeclaration);
-                    type = getTypeFromTypeNode(declaration.type, symbol, typeParameters);
+                    declaration = getDeclarationOfKind<TypeAliasDeclaration>(symbol, SyntaxKind.TypeAliasDeclaration);
+                    type = getTypeFromTypeNode(declaration.type);
                 }
 
                 if (popTypeResolution()) {
-                    links.typeParameters = typeParameters;
+                    const typeParameters = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol);
                     if (typeParameters) {
                         // Initialize the instantiation cache for generic type aliases. The declared type corresponds to
                         // an instantiation of the type alias with the type parameters supplied as type arguments.
+                        links.typeParameters = typeParameters;
                         links.instantiations = createMap<Type>();
-                        links.instantiations[getTypeListId(links.typeParameters)] = type;
+                        links.instantiations.set(getTypeListId(typeParameters), type);
                     }
                 }
                 else {
@@ -3817,77 +5100,80 @@ namespace ts {
             return links.declaredType;
         }
 
-        function isLiteralEnumMember(symbol: Symbol, member: EnumMember) {
+        function isLiteralEnumMember(member: EnumMember) {
             const expr = member.initializer;
             if (!expr) {
                 return !isInAmbientContext(member);
             }
-            return expr.kind === SyntaxKind.NumericLiteral ||
+            return expr.kind === SyntaxKind.StringLiteral || expr.kind === SyntaxKind.NumericLiteral ||
                 expr.kind === SyntaxKind.PrefixUnaryExpression && (<PrefixUnaryExpression>expr).operator === SyntaxKind.MinusToken &&
                 (<PrefixUnaryExpression>expr).operand.kind === SyntaxKind.NumericLiteral ||
-                expr.kind === SyntaxKind.Identifier && !!symbol.exports[(<Identifier>expr).text];
+                expr.kind === SyntaxKind.Identifier && (nodeIsMissing(expr) || !!getSymbolOfNode(member.parent).exports.get((<Identifier>expr).text));
         }
 
-        function enumHasLiteralMembers(symbol: Symbol) {
+        function getEnumKind(symbol: Symbol): EnumKind {
+            const links = getSymbolLinks(symbol);
+            if (links.enumKind !== undefined) {
+                return links.enumKind;
+            }
+            let hasNonLiteralMember = false;
             for (const declaration of symbol.declarations) {
                 if (declaration.kind === SyntaxKind.EnumDeclaration) {
                     for (const member of (<EnumDeclaration>declaration).members) {
-                        if (!isLiteralEnumMember(symbol, member)) {
-                            return false;
+                        if (member.initializer && member.initializer.kind === SyntaxKind.StringLiteral) {
+                            return links.enumKind = EnumKind.Literal;
+                        }
+                        if (!isLiteralEnumMember(member)) {
+                            hasNonLiteralMember = true;
                         }
                     }
                 }
             }
-            return true;
+            return links.enumKind = hasNonLiteralMember ? EnumKind.Numeric : EnumKind.Literal;
         }
 
-        function createEnumLiteralType(symbol: Symbol, baseType: EnumType, text: string) {
-            const type = <EnumLiteralType>createType(TypeFlags.EnumLiteral);
-            type.symbol = symbol;
-            type.baseType = <EnumType & UnionType>baseType;
-            type.text = text;
-            return type;
+        function getBaseTypeOfEnumLiteralType(type: Type) {
+            return type.flags & TypeFlags.EnumLiteral && !(type.flags & TypeFlags.Union) ? getDeclaredTypeOfSymbol(getParentOfSymbol(type.symbol)) : type;
         }
 
         function getDeclaredTypeOfEnum(symbol: Symbol): Type {
             const links = getSymbolLinks(symbol);
-            if (!links.declaredType) {
-                const enumType = links.declaredType = <EnumType>createType(TypeFlags.Enum);
-                enumType.symbol = symbol;
-                if (enumHasLiteralMembers(symbol)) {
-                    const memberTypeList: Type[] = [];
-                    const memberTypes = createMap<EnumLiteralType>();
-                    for (const declaration of enumType.symbol.declarations) {
-                        if (declaration.kind === SyntaxKind.EnumDeclaration) {
-                            computeEnumMemberValues(<EnumDeclaration>declaration);
-                            for (const member of (<EnumDeclaration>declaration).members) {
-                                const memberSymbol = getSymbolOfNode(member);
-                                const value = getEnumMemberValue(member);
-                                if (!memberTypes[value]) {
-                                    const memberType = memberTypes[value] = createEnumLiteralType(memberSymbol, enumType, "" + value);
-                                    memberTypeList.push(memberType);
-                                }
-                            }
+            if (links.declaredType) {
+                return links.declaredType;
+            }
+            if (getEnumKind(symbol) === EnumKind.Literal) {
+                enumCount++;
+                const memberTypeList: Type[] = [];
+                for (const declaration of symbol.declarations) {
+                    if (declaration.kind === SyntaxKind.EnumDeclaration) {
+                        for (const member of (<EnumDeclaration>declaration).members) {
+                            const memberType = getLiteralType(getEnumMemberValue(member), enumCount, getSymbolOfNode(member));
+                            getSymbolLinks(getSymbolOfNode(member)).declaredType = memberType;
+                            memberTypeList.push(memberType);
                         }
                     }
-                    enumType.memberTypes = memberTypes;
-                    if (memberTypeList.length > 1) {
-                        enumType.flags |= TypeFlags.Union;
-                        (<EnumType & UnionType>enumType).types = memberTypeList;
-                        unionTypes[getTypeListId(memberTypeList)] = <EnumType & UnionType>enumType;
+                }
+                if (memberTypeList.length) {
+                    const enumType = getUnionType(memberTypeList, /*subtypeReduction*/ false, symbol, /*aliasTypeArguments*/ undefined);
+                    if (enumType.flags & TypeFlags.Union) {
+                        enumType.flags |= TypeFlags.EnumLiteral;
+                        enumType.symbol = symbol;
                     }
+                    return links.declaredType = enumType;
                 }
             }
-            return links.declaredType;
+            const enumType = createType(TypeFlags.Enum);
+            enumType.symbol = symbol;
+            return links.declaredType = enumType;
         }
 
         function getDeclaredTypeOfEnumMember(symbol: Symbol): Type {
             const links = getSymbolLinks(symbol);
             if (!links.declaredType) {
-                const enumType = <EnumType>getDeclaredTypeOfEnum(getParentOfSymbol(symbol));
-                links.declaredType = enumType.flags & TypeFlags.Union ?
-                    enumType.memberTypes[getEnumMemberValue(<EnumDeclaration>symbol.valueDeclaration)] :
-                    enumType;
+                const enumType = getDeclaredTypeOfEnum(getParentOfSymbol(symbol));
+                if (!links.declaredType) {
+                    links.declaredType = enumType;
+                }
             }
             return links.declaredType;
         }
@@ -3897,9 +5183,6 @@ namespace ts {
             if (!links.declaredType) {
                 const type = <TypeParameter>createType(TypeFlags.TypeParameter);
                 type.symbol = symbol;
-                if (!(<TypeParameterDeclaration>getDeclarationOfKind(symbol, SyntaxKind.TypeParameter)).constraint) {
-                    type.constraint = noConstraintType;
-                }
                 links.declaredType = type;
             }
             return <TypeParameter>links.declaredType;
@@ -3914,7 +5197,6 @@ namespace ts {
         }
 
         function getDeclaredTypeOfSymbol(symbol: Symbol): Type {
-            Debug.assert((symbol.flags & SymbolFlags.Instantiated) === 0);
             if (symbol.flags & (SymbolFlags.Class | SymbolFlags.Interface)) {
                 return getDeclaredTypeOfClassOrInterface(symbol);
             }
@@ -3958,6 +5240,7 @@ namespace ts {
                 case SyntaxKind.NumberKeyword:
                 case SyntaxKind.BooleanKeyword:
                 case SyntaxKind.SymbolKeyword:
+                case SyntaxKind.ObjectKeyword:
                 case SyntaxKind.VoidKeyword:
                 case SyntaxKind.UndefinedKeyword:
                 case SyntaxKind.NullKeyword:
@@ -3975,14 +5258,18 @@ namespace ts {
         // A variable-like declaration is considered independent (free of this references) if it has a type annotation
         // that specifies an independent type, or if it has no type annotation and no initializer (and thus of type any).
         function isIndependentVariableLikeDeclaration(node: VariableLikeDeclaration): boolean {
-            return node.type && isIndependentType(node.type) || !node.type && !node.initializer;
+            const typeNode = getEffectiveTypeAnnotationNode(node);
+            return typeNode ? isIndependentType(typeNode) : !node.initializer;
         }
 
         // A function-like declaration is considered independent (free of this references) if it has a return type
         // annotation that is considered independent and if each parameter is considered independent.
         function isIndependentFunctionLikeDeclaration(node: FunctionLikeDeclaration): boolean {
-            if (node.kind !== SyntaxKind.Constructor && (!node.type || !isIndependentType(node.type))) {
-                return false;
+            if (node.kind !== SyntaxKind.Constructor) {
+                const typeNode = getEffectiveReturnTypeNode(node);
+                if (!typeNode || !isIndependentType(typeNode)) {
+                    return false;
+                }
             }
             for (const parameter of node.parameters) {
                 if (!isIndependentVariableLikeDeclaration(parameter)) {
@@ -4018,7 +5305,7 @@ namespace ts {
         function createSymbolTable(symbols: Symbol[]): SymbolTable {
             const result = createMap<Symbol>();
             for (const symbol of symbols) {
-                result[symbol.name] = symbol;
+                result.set(symbol.name, symbol);
             }
             return result;
         }
@@ -4028,15 +5315,15 @@ namespace ts {
         function createInstantiatedSymbolTable(symbols: Symbol[], mapper: TypeMapper, mappingThisOnly: boolean): SymbolTable {
             const result = createMap<Symbol>();
             for (const symbol of symbols) {
-                result[symbol.name] = mappingThisOnly && isIndependentMember(symbol) ? symbol : instantiateSymbol(symbol, mapper);
+                result.set(symbol.name, mappingThisOnly && isIndependentMember(symbol) ? symbol : instantiateSymbol(symbol, mapper));
             }
             return result;
         }
 
         function addInheritedMembers(symbols: SymbolTable, baseSymbols: Symbol[]) {
             for (const s of baseSymbols) {
-                if (!symbols[s.name]) {
-                    symbols[s.name] = s;
+                if (!symbols.has(s.name)) {
+                    symbols.set(s.name, s);
                 }
             }
         }
@@ -4045,18 +5332,24 @@ namespace ts {
             if (!(<InterfaceTypeWithDeclaredMembers>type).declaredProperties) {
                 const symbol = type.symbol;
                 (<InterfaceTypeWithDeclaredMembers>type).declaredProperties = getNamedMembers(symbol.members);
-                (<InterfaceTypeWithDeclaredMembers>type).declaredCallSignatures = getSignaturesOfSymbol(symbol.members["__call"]);
-                (<InterfaceTypeWithDeclaredMembers>type).declaredConstructSignatures = getSignaturesOfSymbol(symbol.members["__new"]);
+                (<InterfaceTypeWithDeclaredMembers>type).declaredCallSignatures = getSignaturesOfSymbol(symbol.members.get("__call"));
+                (<InterfaceTypeWithDeclaredMembers>type).declaredConstructSignatures = getSignaturesOfSymbol(symbol.members.get("__new"));
                 (<InterfaceTypeWithDeclaredMembers>type).declaredStringIndexInfo = getIndexInfoOfSymbol(symbol, IndexKind.String);
                 (<InterfaceTypeWithDeclaredMembers>type).declaredNumberIndexInfo = getIndexInfoOfSymbol(symbol, IndexKind.Number);
             }
             return <InterfaceTypeWithDeclaredMembers>type;
         }
 
-        function getTypeWithThisArgument(type: ObjectType, thisArgument?: Type) {
-            if (type.flags & TypeFlags.Reference) {
-                return createTypeReference((<TypeReference>type).target,
-                    concatenate((<TypeReference>type).typeArguments, [thisArgument || (<TypeReference>type).target.thisType]));
+        function getTypeWithThisArgument(type: Type, thisArgument?: Type): Type {
+            if (getObjectFlags(type) & ObjectFlags.Reference) {
+                const target = (<TypeReference>type).target;
+                const typeArguments = (<TypeReference>type).typeArguments;
+                if (length(target.typeParameters) === length(typeArguments)) {
+                    return createTypeReference(target, concatenate(typeArguments, [thisArgument || target.thisType]));
+                }
+            }
+            else if (type.flags & TypeFlags.Intersection) {
+                return getIntersectionType(map((<IntersectionType>type).types, t => getTypeWithThisArgument(t, thisArgument)));
             }
             return type;
         }
@@ -4079,8 +5372,8 @@ namespace ts {
             else {
                 mapper = createTypeMapper(typeParameters, typeArguments);
                 members = createInstantiatedSymbolTable(source.declaredProperties, mapper, /*mappingThisOnly*/ typeParameters.length === 1);
-                callSignatures = instantiateList(source.declaredCallSignatures, mapper, instantiateSignature);
-                constructSignatures = instantiateList(source.declaredConstructSignatures, mapper, instantiateSignature);
+                callSignatures = instantiateSignatures(source.declaredCallSignatures, mapper);
+                constructSignatures = instantiateSignatures(source.declaredConstructSignatures, mapper);
                 stringIndexInfo = instantiateIndexInfo(source.declaredStringIndexInfo, mapper);
                 numberIndexInfo = instantiateIndexInfo(source.declaredNumberIndexInfo, mapper);
             }
@@ -4092,14 +5385,18 @@ namespace ts {
                 const thisArgument = lastOrUndefined(typeArguments);
                 for (const baseType of baseTypes) {
                     const instantiatedBaseType = thisArgument ? getTypeWithThisArgument(instantiateType(baseType, mapper), thisArgument) : baseType;
-                    addInheritedMembers(members, getPropertiesOfObjectType(instantiatedBaseType));
+                    addInheritedMembers(members, getPropertiesOfType(instantiatedBaseType));
                     callSignatures = concatenate(callSignatures, getSignaturesOfType(instantiatedBaseType, SignatureKind.Call));
                     constructSignatures = concatenate(constructSignatures, getSignaturesOfType(instantiatedBaseType, SignatureKind.Construct));
-                    stringIndexInfo = stringIndexInfo || getIndexInfoOfType(instantiatedBaseType, IndexKind.String);
+                    if (!stringIndexInfo) {
+                        stringIndexInfo = instantiatedBaseType === anyType ?
+                            createIndexInfo(anyType, /*isReadonly*/ false) :
+                            getIndexInfoOfType(instantiatedBaseType, IndexKind.String);
+                    }
                     numberIndexInfo = numberIndexInfo || getIndexInfoOfType(instantiatedBaseType, IndexKind.Number);
                 }
             }
-            setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+            setStructuredTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
         }
 
         function resolveClassOrInterfaceMembers(type: InterfaceType): void {
@@ -4141,13 +5438,15 @@ namespace ts {
                 return [createSignature(undefined, classType.localTypeParameters, undefined, emptyArray, classType, /*typePredicate*/ undefined, 0, /*hasRestParameter*/ false, /*hasLiteralTypes*/ false)];
             }
             const baseTypeNode = getBaseTypeNodeOfClass(classType);
-            const typeArguments = map(baseTypeNode.typeArguments, getTypeFromTypeNodeNoAlias);
-            const typeArgCount = typeArguments ? typeArguments.length : 0;
+            const isJavaScript = isInJavaScriptFile(baseTypeNode);
+            const typeArguments = typeArgumentsFromTypeReferenceNode(baseTypeNode);
+            const typeArgCount = length(typeArguments);
             const result: Signature[] = [];
             for (const baseSig of baseSignatures) {
-                const typeParamCount = baseSig.typeParameters ? baseSig.typeParameters.length : 0;
-                if (typeParamCount === typeArgCount) {
-                    const sig = typeParamCount ? getSignatureInstantiation(baseSig, typeArguments) : cloneSignature(baseSig);
+                const minTypeArgumentCount = getMinTypeArgumentCount(baseSig.typeParameters);
+                const typeParamCount = length(baseSig.typeParameters);
+                if ((isJavaScript || typeArgCount >= minTypeArgumentCount) && typeArgCount <= typeParamCount) {
+                    const sig = typeParamCount ? createSignatureInstantiation(baseSig, fillMissingTypeArguments(typeArguments, baseSig.typeParameters, minTypeArgumentCount, baseTypeNode)) : cloneSignature(baseSig);
                     sig.typeParameters = classType.localTypeParameters;
                     sig.resolvedReturnType = classType;
                     result.push(sig);
@@ -4211,7 +5510,7 @@ namespace ts {
                                 s = cloneSignature(signature);
                                 if (forEach(unionSignatures, sig => sig.thisParameter)) {
                                     const thisType = getUnionType(map(unionSignatures, sig => getTypeOfSymbol(sig.thisParameter) || anyType), /*subtypeReduction*/ true);
-                                    s.thisParameter = createTransientSymbol(signature.thisParameter, thisType);
+                                    s.thisParameter = createSymbolWithType(signature.thisParameter, thisType);
                                 }
                                 // Clear resolved return type we possibly got from cloneSignature
                                 s.resolvedReturnType = undefined;
@@ -4246,7 +5545,7 @@ namespace ts {
             const constructSignatures = getUnionSignatures(type.types, SignatureKind.Construct);
             const stringIndexInfo = getUnionIndexInfo(type.types, IndexKind.String);
             const numberIndexInfo = getUnionIndexInfo(type.types, IndexKind.Number);
-            setObjectTypeMembers(type, emptySymbols, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+            setStructuredTypeMembers(type, emptySymbols, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
         }
 
         function intersectTypes(type1: Type, type2: Type): Type {
@@ -4258,61 +5557,104 @@ namespace ts {
                 getIntersectionType([info1.type, info2.type]), info1.isReadonly && info2.isReadonly);
         }
 
+        function unionSpreadIndexInfos(info1: IndexInfo, info2: IndexInfo): IndexInfo {
+            return info1 && info2 && createIndexInfo(
+                getUnionType([info1.type, info2.type]), info1.isReadonly || info2.isReadonly);
+        }
+
+        function includeMixinType(type: Type, types: Type[], index: number): Type {
+            const mixedTypes: Type[] = [];
+            for (let i = 0; i < types.length; i++) {
+                if (i === index) {
+                    mixedTypes.push(type);
+                }
+                else if (isMixinConstructorType(types[i])) {
+                    mixedTypes.push(getReturnTypeOfSignature(getSignaturesOfType(types[i], SignatureKind.Construct)[0]));
+                }
+            }
+            return getIntersectionType(mixedTypes);
+        }
+
         function resolveIntersectionTypeMembers(type: IntersectionType) {
             // The members and properties collections are empty for intersection types. To get all properties of an
             // intersection type use getPropertiesOfType (only the language service uses this).
             let callSignatures: Signature[] = emptyArray;
             let constructSignatures: Signature[] = emptyArray;
-            let stringIndexInfo: IndexInfo = undefined;
-            let numberIndexInfo: IndexInfo = undefined;
-            for (const t of type.types) {
+            let stringIndexInfo: IndexInfo;
+            let numberIndexInfo: IndexInfo;
+            const types = type.types;
+            const mixinCount = countWhere(types, isMixinConstructorType);
+            for (let i = 0; i < types.length; i++) {
+                const t = type.types[i];
+                // When an intersection type contains mixin constructor types, the construct signatures from
+                // those types are discarded and their return types are mixed into the return types of all
+                // other construct signatures in the intersection type. For example, the intersection type
+                // '{ new(...args: any[]) => A } & { new(s: string) => B }' has a single construct signature
+                // 'new(s: string) => A & B'.
+                if (mixinCount === 0 || mixinCount === types.length && i === 0 || !isMixinConstructorType(t)) {
+                    let signatures = getSignaturesOfType(t, SignatureKind.Construct);
+                    if (signatures.length && mixinCount > 0) {
+                        signatures = map(signatures, s => {
+                            const clone = cloneSignature(s);
+                            clone.resolvedReturnType = includeMixinType(getReturnTypeOfSignature(s), types, i);
+                            return clone;
+                        });
+                    }
+                    constructSignatures = concatenate(constructSignatures, signatures);
+                }
                 callSignatures = concatenate(callSignatures, getSignaturesOfType(t, SignatureKind.Call));
-                constructSignatures = concatenate(constructSignatures, getSignaturesOfType(t, SignatureKind.Construct));
                 stringIndexInfo = intersectIndexInfos(stringIndexInfo, getIndexInfoOfType(t, IndexKind.String));
                 numberIndexInfo = intersectIndexInfos(numberIndexInfo, getIndexInfoOfType(t, IndexKind.Number));
             }
-            setObjectTypeMembers(type, emptySymbols, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+            setStructuredTypeMembers(type, emptySymbols, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
         }
 
+        /**
+         * Converts an AnonymousType to a ResolvedType.
+         */
         function resolveAnonymousTypeMembers(type: AnonymousType) {
             const symbol = type.symbol;
             if (type.target) {
                 const members = createInstantiatedSymbolTable(getPropertiesOfObjectType(type.target), type.mapper, /*mappingThisOnly*/ false);
-                const callSignatures = instantiateList(getSignaturesOfType(type.target, SignatureKind.Call), type.mapper, instantiateSignature);
-                const constructSignatures = instantiateList(getSignaturesOfType(type.target, SignatureKind.Construct), type.mapper, instantiateSignature);
+                const callSignatures = instantiateSignatures(getSignaturesOfType(type.target, SignatureKind.Call), type.mapper);
+                const constructSignatures = instantiateSignatures(getSignaturesOfType(type.target, SignatureKind.Construct), type.mapper);
                 const stringIndexInfo = instantiateIndexInfo(getIndexInfoOfType(type.target, IndexKind.String), type.mapper);
                 const numberIndexInfo = instantiateIndexInfo(getIndexInfoOfType(type.target, IndexKind.Number), type.mapper);
-                setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+                setStructuredTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
             }
             else if (symbol.flags & SymbolFlags.TypeLiteral) {
                 const members = symbol.members;
-                const callSignatures = getSignaturesOfSymbol(members["__call"]);
-                const constructSignatures = getSignaturesOfSymbol(members["__new"]);
+                const callSignatures = getSignaturesOfSymbol(members.get("__call"));
+                const constructSignatures = getSignaturesOfSymbol(members.get("__new"));
                 const stringIndexInfo = getIndexInfoOfSymbol(symbol, IndexKind.String);
                 const numberIndexInfo = getIndexInfoOfSymbol(symbol, IndexKind.Number);
-                setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+                setStructuredTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
             }
             else {
                 // Combinations of function, class, enum and module
                 let members = emptySymbols;
                 let constructSignatures: Signature[] = emptyArray;
-                if (symbol.flags & SymbolFlags.HasExports) {
+                let stringIndexInfo: IndexInfo = undefined;
+                if (symbol.exports) {
                     members = getExportsOfSymbol(symbol);
                 }
                 if (symbol.flags & SymbolFlags.Class) {
                     const classType = getDeclaredTypeOfClassOrInterface(symbol);
-                    constructSignatures = getSignaturesOfSymbol(symbol.members["__constructor"]);
+                    constructSignatures = getSignaturesOfSymbol(symbol.members.get("__constructor"));
                     if (!constructSignatures.length) {
                         constructSignatures = getDefaultConstructSignatures(classType);
                     }
                     const baseConstructorType = getBaseConstructorTypeOfClass(classType);
-                    if (baseConstructorType.flags & TypeFlags.ObjectType) {
+                    if (baseConstructorType.flags & (TypeFlags.Object | TypeFlags.Intersection | TypeFlags.TypeVariable)) {
                         members = createSymbolTable(getNamedMembers(members));
-                        addInheritedMembers(members, getPropertiesOfObjectType(baseConstructorType));
+                        addInheritedMembers(members, getPropertiesOfType(baseConstructorType));
+                    }
+                    else if (baseConstructorType === anyType) {
+                        stringIndexInfo = createIndexInfo(anyType, /*isReadonly*/ false);
                     }
                 }
                 const numberIndexInfo = symbol.flags & SymbolFlags.Enum ? enumNumberIndexInfo : undefined;
-                setObjectTypeMembers(type, members, emptyArray, constructSignatures, undefined, numberIndexInfo);
+                setStructuredTypeMembers(type, members, emptyArray, constructSignatures, stringIndexInfo, numberIndexInfo);
                 // We resolve the members before computing the signatures because a signature may use
                 // typeof with a qualified name expression that circularly references the type we are
                 // in the process of resolving (see issue #6072). The temporarily empty signature list
@@ -4323,16 +5665,129 @@ namespace ts {
             }
         }
 
-        function resolveStructuredTypeMembers(type: ObjectType): ResolvedType {
+        /** Resolve the members of a mapped type { [P in K]: T } */
+        function resolveMappedTypeMembers(type: MappedType) {
+            const members: SymbolTable = createMap<Symbol>();
+            let stringIndexInfo: IndexInfo;
+            // Resolve upfront such that recursive references see an empty object type.
+            setStructuredTypeMembers(type, emptySymbols, emptyArray, emptyArray, undefined, undefined);
+            // In { [P in K]: T }, we refer to P as the type parameter type, K as the constraint type,
+            // and T as the template type.
+            const typeParameter = getTypeParameterFromMappedType(type);
+            const constraintType = getConstraintTypeFromMappedType(type);
+            const templateType = getTemplateTypeFromMappedType(type);
+            const modifiersType = getApparentType(getModifiersTypeFromMappedType(type)); // The 'T' in 'keyof T'
+            const templateReadonly = !!type.declaration.readonlyToken;
+            const templateOptional = !!type.declaration.questionToken;
+            if (type.declaration.typeParameter.constraint.kind === SyntaxKind.TypeOperator) {
+                // We have a { [P in keyof T]: X }
+                for (const propertySymbol of getPropertiesOfType(modifiersType)) {
+                    addMemberForKeyType(getLiteralTypeFromPropertyName(propertySymbol), propertySymbol);
+                }
+                if (getIndexInfoOfType(modifiersType, IndexKind.String)) {
+                    addMemberForKeyType(stringType);
+                }
+            }
+            else {
+                // First, if the constraint type is a type parameter, obtain the base constraint. Then,
+                // if the key type is a 'keyof X', obtain 'keyof C' where C is the base constraint of X.
+                // Finally, iterate over the constituents of the resulting iteration type.
+                const keyType = constraintType.flags & TypeFlags.TypeVariable ? getApparentType(constraintType) : constraintType;
+                const iterationType = keyType.flags & TypeFlags.Index ? getIndexType(getApparentType((<IndexType>keyType).type)) : keyType;
+                forEachType(iterationType, addMemberForKeyType);
+            }
+            setStructuredTypeMembers(type, members, emptyArray, emptyArray, stringIndexInfo, undefined);
+
+            function addMemberForKeyType(t: Type, propertySymbol?: Symbol) {
+                // Create a mapper from T to the current iteration type constituent. Then, if the
+                // mapped type is itself an instantiated type, combine the iteration mapper with the
+                // instantiation mapper.
+                const iterationMapper = createTypeMapper([typeParameter], [t]);
+                const templateMapper = type.mapper ? combineTypeMappers(type.mapper, iterationMapper) : iterationMapper;
+                const propType = instantiateType(templateType, templateMapper);
+                // If the current iteration type constituent is a string literal type, create a property.
+                // Otherwise, for type string create a string index signature.
+                if (t.flags & TypeFlags.StringLiteral) {
+                    const propName = (<StringLiteralType>t).value;
+                    const modifiersProp = getPropertyOfType(modifiersType, propName);
+                    const isOptional = templateOptional || !!(modifiersProp && modifiersProp.flags & SymbolFlags.Optional);
+                    const prop = createSymbol(SymbolFlags.Property | (isOptional ? SymbolFlags.Optional : 0), propName);
+                    prop.checkFlags = templateReadonly || modifiersProp && isReadonlySymbol(modifiersProp) ? CheckFlags.Readonly : 0;
+                    prop.type = propType;
+                    if (propertySymbol) {
+                        prop.syntheticOrigin = propertySymbol;
+                        prop.declarations = propertySymbol.declarations;
+                    }
+                    members.set(propName, prop);
+                }
+                else if (t.flags & TypeFlags.String) {
+                    stringIndexInfo = createIndexInfo(propType, templateReadonly);
+                }
+            }
+        }
+
+        function getTypeParameterFromMappedType(type: MappedType) {
+            return type.typeParameter ||
+                (type.typeParameter = getDeclaredTypeOfTypeParameter(getSymbolOfNode(type.declaration.typeParameter)));
+        }
+
+        function getConstraintTypeFromMappedType(type: MappedType) {
+            return type.constraintType ||
+                (type.constraintType = instantiateType(getConstraintOfTypeParameter(getTypeParameterFromMappedType(type)), type.mapper || identityMapper) || unknownType);
+        }
+
+        function getTemplateTypeFromMappedType(type: MappedType) {
+            return type.templateType ||
+                (type.templateType = type.declaration.type ?
+                    instantiateType(addOptionality(getTypeFromTypeNode(type.declaration.type), !!type.declaration.questionToken), type.mapper || identityMapper) :
+                    unknownType);
+        }
+
+        function getModifiersTypeFromMappedType(type: MappedType) {
+            if (!type.modifiersType) {
+                const constraintDeclaration = type.declaration.typeParameter.constraint;
+                if (constraintDeclaration.kind === SyntaxKind.TypeOperator) {
+                    // If the constraint declaration is a 'keyof T' node, the modifiers type is T. We check
+                    // AST nodes here because, when T is a non-generic type, the logic below eagerly resolves
+                    // 'keyof T' to a literal union type and we can't recover T from that type.
+                    type.modifiersType = instantiateType(getTypeFromTypeNode((<TypeOperatorNode>constraintDeclaration).type), type.mapper || identityMapper);
+                }
+                else {
+                    // Otherwise, get the declared constraint type, and if the constraint type is a type parameter,
+                    // get the constraint of that type parameter. If the resulting type is an indexed type 'keyof T',
+                    // the modifiers type is T. Otherwise, the modifiers type is {}.
+                    const declaredType = <MappedType>getTypeFromMappedTypeNode(type.declaration);
+                    const constraint = getConstraintTypeFromMappedType(declaredType);
+                    const extendedConstraint = constraint && constraint.flags & TypeFlags.TypeParameter ? getConstraintOfTypeParameter(<TypeParameter>constraint) : constraint;
+                    type.modifiersType = extendedConstraint && extendedConstraint.flags & TypeFlags.Index ? instantiateType((<IndexType>extendedConstraint).type, type.mapper || identityMapper) : emptyObjectType;
+                }
+            }
+            return type.modifiersType;
+        }
+
+        function isGenericMappedType(type: Type) {
+            if (getObjectFlags(type) & ObjectFlags.Mapped) {
+                const constraintType = getConstraintTypeFromMappedType(<MappedType>type);
+                return maybeTypeOfKind(constraintType, TypeFlags.TypeVariable | TypeFlags.Index);
+            }
+            return false;
+        }
+
+        function resolveStructuredTypeMembers(type: StructuredType): ResolvedType {
             if (!(<ResolvedType>type).members) {
-                if (type.flags & TypeFlags.Reference) {
-                    resolveTypeReferenceMembers(<TypeReference>type);
-                }
-                else if (type.flags & (TypeFlags.Class | TypeFlags.Interface)) {
-                    resolveClassOrInterfaceMembers(<InterfaceType>type);
-                }
-                else if (type.flags & TypeFlags.Anonymous) {
-                    resolveAnonymousTypeMembers(<AnonymousType>type);
+                if (type.flags & TypeFlags.Object) {
+                    if ((<ObjectType>type).objectFlags & ObjectFlags.Reference) {
+                        resolveTypeReferenceMembers(<TypeReference>type);
+                    }
+                    else if ((<ObjectType>type).objectFlags & ObjectFlags.ClassOrInterface) {
+                        resolveClassOrInterfaceMembers(<InterfaceType>type);
+                    }
+                    else if ((<ObjectType>type).objectFlags & ObjectFlags.Anonymous) {
+                        resolveAnonymousTypeMembers(<AnonymousType>type);
+                    }
+                    else if ((<MappedType>type).objectFlags & ObjectFlags.Mapped) {
+                        resolveMappedTypeMembers(<MappedType>type);
+                    }
                 }
                 else if (type.flags & TypeFlags.Union) {
                     resolveUnionTypeMembers(<UnionType>type);
@@ -4346,18 +5801,19 @@ namespace ts {
 
         /** Return properties of an object type or an empty array for other types */
         function getPropertiesOfObjectType(type: Type): Symbol[] {
-            if (type.flags & TypeFlags.ObjectType) {
+            if (type.flags & TypeFlags.Object) {
                 return resolveStructuredTypeMembers(<ObjectType>type).properties;
             }
             return emptyArray;
         }
 
         /** If the given type is an object type and that type has a property by the given name,
-         * return the symbol for that property. Otherwise return undefined. */
+         * return the symbol for that property. Otherwise return undefined.
+         */
         function getPropertyOfObjectType(type: Type, name: string): Symbol {
-            if (type.flags & TypeFlags.ObjectType) {
+            if (type.flags & TypeFlags.Object) {
                 const resolved = resolveStructuredTypeMembers(<ObjectType>type);
-                const symbol = resolved.members[name];
+                const symbol = resolved.members.get(name);
                 if (symbol && symbolIsValue(symbol)) {
                     return symbol;
                 }
@@ -4365,49 +5821,172 @@ namespace ts {
         }
 
         function getPropertiesOfUnionOrIntersectionType(type: UnionOrIntersectionType): Symbol[] {
-            for (const current of type.types) {
-                for (const prop of getPropertiesOfType(current)) {
-                    getUnionOrIntersectionProperty(type, prop.name);
-                }
-                // The properties of a union type are those that are present in all constituent types, so
-                // we only need to check the properties of the first type
-                if (type.flags & TypeFlags.Union) {
-                    break;
+            if (!type.resolvedProperties) {
+                const members = createMap<Symbol>();
+                for (const current of type.types) {
+                    for (const prop of getPropertiesOfType(current)) {
+                        if (!members.has(prop.name)) {
+                            const combinedProp = getPropertyOfUnionOrIntersectionType(type, prop.name);
+                            if (combinedProp) {
+                                members.set(prop.name, combinedProp);
+                            }
+                        }
+                    }
+                    // The properties of a union type are those that are present in all constituent types, so
+                    // we only need to check the properties of the first type
+                    if (type.flags & TypeFlags.Union) {
+                        break;
+                    }
                 }
+                type.resolvedProperties = getNamedMembers(members);
             }
-            const props = type.resolvedProperties;
-            if (props) {
-                const result: Symbol[] = [];
-                for (const key in props) {
-                    const prop = props[key];
-                    // We need to filter out partial properties in union types
-                    if (!(prop.flags & SymbolFlags.SyntheticProperty && (<TransientSymbol>prop).isPartial)) {
-                        result.push(prop);
+            return type.resolvedProperties;
+        }
+
+        function getPropertiesOfType(type: Type): Symbol[] {
+            type = getApparentType(type);
+            return type.flags & TypeFlags.UnionOrIntersection ?
+                getPropertiesOfUnionOrIntersectionType(<UnionType>type) :
+                getPropertiesOfObjectType(type);
+        }
+
+        function getAllPossiblePropertiesOfType(type: Type): Symbol[] {
+            if (type.flags & TypeFlags.Union) {
+                const props = createMap<Symbol>();
+                for (const memberType of (type as UnionType).types) {
+                    if (memberType.flags & TypeFlags.Primitive) {
+                        continue;
+                    }
+
+                    for (const { name } of getPropertiesOfType(memberType)) {
+                        if (!props.has(name)) {
+                            props.set(name, createUnionOrIntersectionProperty(type as UnionType, name));
+                        }
                     }
                 }
+                return arrayFrom(props.values());
+            }
+            else {
+                return getPropertiesOfType(type);
+            }
+        }
+
+        function getConstraintOfType(type: TypeVariable | UnionOrIntersectionType): Type {
+            return type.flags & TypeFlags.TypeParameter ? getConstraintOfTypeParameter(<TypeParameter>type) :
+                type.flags & TypeFlags.IndexedAccess ? getConstraintOfIndexedAccess(<IndexedAccessType>type) :
+                    getBaseConstraintOfType(type);
+        }
+
+        function getConstraintOfTypeParameter(typeParameter: TypeParameter): Type {
+            return hasNonCircularBaseConstraint(typeParameter) ? getConstraintFromTypeParameter(typeParameter) : undefined;
+        }
+
+        function getConstraintOfIndexedAccess(type: IndexedAccessType) {
+            const baseObjectType = getBaseConstraintOfType(type.objectType);
+            const baseIndexType = getBaseConstraintOfType(type.indexType);
+            return baseObjectType || baseIndexType ? getIndexedAccessType(baseObjectType || type.objectType, baseIndexType || type.indexType) : undefined;
+        }
+
+        function getBaseConstraintOfType(type: Type): Type {
+            if (type.flags & (TypeFlags.TypeVariable | TypeFlags.UnionOrIntersection)) {
+                const constraint = getResolvedBaseConstraint(<TypeVariable | UnionOrIntersectionType>type);
+                if (constraint !== noConstraintType && constraint !== circularConstraintType) {
+                    return constraint;
+                }
+            }
+            else if (type.flags & TypeFlags.Index) {
+                return stringType;
+            }
+            return undefined;
+        }
+
+        function hasNonCircularBaseConstraint(type: TypeVariable): boolean {
+            return getResolvedBaseConstraint(type) !== circularConstraintType;
+        }
+
+        /**
+         * Return the resolved base constraint of a type variable. The noConstraintType singleton is returned if the
+         * type variable has no constraint, and the circularConstraintType singleton is returned if the constraint
+         * circularly references the type variable.
+         */
+        function getResolvedBaseConstraint(type: TypeVariable | UnionOrIntersectionType): Type {
+            let typeStack: Type[];
+            let circular: boolean;
+            if (!type.resolvedBaseConstraint) {
+                typeStack = [];
+                const constraint = getBaseConstraint(type);
+                type.resolvedBaseConstraint = circular ? circularConstraintType : getTypeWithThisArgument(constraint || noConstraintType, type);
+            }
+            return type.resolvedBaseConstraint;
+
+            function getBaseConstraint(t: Type): Type {
+                if (contains(typeStack, t)) {
+                    circular = true;
+                    return undefined;
+                }
+                typeStack.push(t);
+                const result = computeBaseConstraint(t);
+                typeStack.pop();
                 return result;
             }
-            return emptyArray;
+
+            function computeBaseConstraint(t: Type): Type {
+                if (t.flags & TypeFlags.TypeParameter) {
+                    const constraint = getConstraintFromTypeParameter(<TypeParameter>t);
+                    return (<TypeParameter>t).isThisType ? constraint :
+                        constraint ? getBaseConstraint(constraint) : undefined;
+                }
+                if (t.flags & TypeFlags.UnionOrIntersection) {
+                    const types = (<UnionOrIntersectionType>t).types;
+                    const baseTypes: Type[] = [];
+                    for (const type of types) {
+                        const baseType = getBaseConstraint(type);
+                        if (baseType) {
+                            baseTypes.push(baseType);
+                        }
+                    }
+                    return t.flags & TypeFlags.Union && baseTypes.length === types.length ? getUnionType(baseTypes) :
+                        t.flags & TypeFlags.Intersection && baseTypes.length ? getIntersectionType(baseTypes) :
+                            undefined;
+                }
+                if (t.flags & TypeFlags.Index) {
+                    return stringType;
+                }
+                if (t.flags & TypeFlags.IndexedAccess) {
+                    const baseObjectType = getBaseConstraint((<IndexedAccessType>t).objectType);
+                    const baseIndexType = getBaseConstraint((<IndexedAccessType>t).indexType);
+                    const baseIndexedAccess = baseObjectType && baseIndexType ? getIndexedAccessType(baseObjectType, baseIndexType) : undefined;
+                    return baseIndexedAccess && baseIndexedAccess !== unknownType ? getBaseConstraint(baseIndexedAccess) : undefined;
+                }
+                return t;
+            }
         }
 
-        function getPropertiesOfType(type: Type): Symbol[] {
-            type = getApparentType(type);
-            return type.flags & TypeFlags.UnionOrIntersection ? getPropertiesOfUnionOrIntersectionType(<UnionType>type) : getPropertiesOfObjectType(type);
+        function getApparentTypeOfIntersectionType(type: IntersectionType) {
+            return type.resolvedApparentType || (type.resolvedApparentType = getTypeWithThisArgument(type, type));
         }
 
         /**
-         * The apparent type of a type parameter is the base constraint instantiated with the type parameter
-         * as the type argument for the 'this' type.
+         * Gets the default type for a type parameter.
+         *
+         * If the type parameter is the result of an instantiation, this gets the instantiated
+         * default type of its target. If the type parameter has no default type, `undefined`
+         * is returned.
+         *
+         * This function *does not* perform a circularity check.
          */
-        function getApparentTypeOfTypeParameter(type: TypeParameter) {
-            if (!type.resolvedApparentType) {
-                let constraintType = getConstraintOfTypeParameter(type);
-                while (constraintType && constraintType.flags & TypeFlags.TypeParameter) {
-                    constraintType = getConstraintOfTypeParameter(<TypeParameter>constraintType);
+        function getDefaultFromTypeParameter(typeParameter: TypeParameter): Type | undefined {
+            if (!typeParameter.default) {
+                if (typeParameter.target) {
+                    const targetDefault = getDefaultFromTypeParameter(typeParameter.target);
+                    typeParameter.default = targetDefault ? instantiateType(targetDefault, typeParameter.mapper) : noConstraintType;
+                }
+                else {
+                    const defaultDeclaration = typeParameter.symbol && forEach(typeParameter.symbol.declarations, decl => isTypeParameterDeclaration(decl) && decl.default);
+                    typeParameter.default = defaultDeclaration ? getTypeFromTypeNode(defaultDeclaration) : noConstraintType;
                 }
-                type.resolvedApparentType = getTypeWithThisArgument(constraintType || emptyObjectType, type);
             }
-            return type.resolvedApparentType;
+            return typeParameter.default === noConstraintType ? undefined : typeParameter.default;
         }
 
         /**
@@ -4416,36 +5995,31 @@ namespace ts {
          * type itself. Note that the apparent type of a union type is the union type itself.
          */
         function getApparentType(type: Type): Type {
-            if (type.flags & TypeFlags.TypeParameter) {
-                type = getApparentTypeOfTypeParameter(<TypeParameter>type);
-            }
-            if (type.flags & TypeFlags.StringLike) {
-                type = globalStringType;
-            }
-            else if (type.flags & TypeFlags.NumberLike) {
-                type = globalNumberType;
-            }
-            else if (type.flags & TypeFlags.BooleanLike) {
-                type = globalBooleanType;
-            }
-            else if (type.flags & TypeFlags.ESSymbol) {
-                type = getGlobalESSymbolType();
-            }
-            return type;
+            const t = type.flags & TypeFlags.TypeVariable ? getBaseConstraintOfType(type) || emptyObjectType : type;
+            return t.flags & TypeFlags.Intersection ? getApparentTypeOfIntersectionType(<IntersectionType>t) :
+                t.flags & TypeFlags.StringLike ? globalStringType :
+                t.flags & TypeFlags.NumberLike ? globalNumberType :
+                t.flags & TypeFlags.BooleanLike ? globalBooleanType :
+                t.flags & TypeFlags.ESSymbol ? getGlobalESSymbolType(/*reportErrors*/ languageVersion >= ScriptTarget.ES2015) :
+                t.flags & TypeFlags.NonPrimitive ? emptyObjectType :
+                t;
         }
 
         function createUnionOrIntersectionProperty(containingType: UnionOrIntersectionType, name: string): Symbol {
-            const types = containingType.types;
             let props: Symbol[];
+            const types = containingType.types;
+            const isUnion = containingType.flags & TypeFlags.Union;
+            const excludeModifiers = isUnion ? ModifierFlags.NonPublicAccessibilityModifier : 0;
             // Flags we want to propagate to the result if they exist in all source symbols
-            let commonFlags = (containingType.flags & TypeFlags.Intersection) ? SymbolFlags.Optional : SymbolFlags.None;
-            let isReadonly = false;
-            let isPartial = false;
+            let commonFlags = isUnion ? SymbolFlags.None : SymbolFlags.Optional;
+            let syntheticFlag = CheckFlags.SyntheticMethod;
+            let checkFlags = 0;
             for (const current of types) {
                 const type = getApparentType(current);
                 if (type !== unknownType) {
                     const prop = getPropertyOfType(type, name);
-                    if (prop && !(getDeclarationModifierFlagsFromSymbol(prop) & (ModifierFlags.Private | ModifierFlags.Protected))) {
+                    const modifiers = prop ? getDeclarationModifierFlagsFromSymbol(prop) : 0;
+                    if (prop && !(modifiers & excludeModifiers)) {
                         commonFlags &= prop.flags;
                         if (!props) {
                             props = [prop];
@@ -4453,25 +6027,29 @@ namespace ts {
                         else if (!contains(props, prop)) {
                             props.push(prop);
                         }
-                        if (isReadonlySymbol(prop)) {
-                            isReadonly = true;
+                        checkFlags |= (isReadonlySymbol(prop) ? CheckFlags.Readonly : 0) |
+                            (!(modifiers & ModifierFlags.NonPublicAccessibilityModifier) ? CheckFlags.ContainsPublic : 0) |
+                            (modifiers & ModifierFlags.Protected ? CheckFlags.ContainsProtected : 0) |
+                            (modifiers & ModifierFlags.Private ? CheckFlags.ContainsPrivate : 0) |
+                            (modifiers & ModifierFlags.Static ? CheckFlags.ContainsStatic : 0);
+                        if (!isMethodLike(prop)) {
+                            syntheticFlag = CheckFlags.SyntheticProperty;
                         }
                     }
-                    else if (containingType.flags & TypeFlags.Union) {
-                        isPartial = true;
+                    else if (isUnion) {
+                        checkFlags |= CheckFlags.Partial;
                     }
                 }
             }
             if (!props) {
                 return undefined;
             }
-            if (props.length === 1 && !isPartial) {
+            if (props.length === 1 && !(checkFlags & CheckFlags.Partial)) {
                 return props[0];
             }
             const propTypes: Type[] = [];
             const declarations: Declaration[] = [];
             let commonType: Type = undefined;
-            let hasNonUniformType = false;
             for (const prop of props) {
                 if (prop.declarations) {
                     addRange(declarations, prop.declarations);
@@ -4481,17 +6059,15 @@ namespace ts {
                     commonType = type;
                 }
                 else if (type !== commonType) {
-                    hasNonUniformType = true;
+                    checkFlags |= CheckFlags.HasNonUniformType;
                 }
                 propTypes.push(type);
             }
-            const result = <TransientSymbol>createSymbol(SymbolFlags.Property | SymbolFlags.Transient | SymbolFlags.SyntheticProperty | commonFlags, name);
+            const result = createSymbol(SymbolFlags.Property | commonFlags, name);
+            result.checkFlags = syntheticFlag | checkFlags;
             result.containingType = containingType;
-            result.hasNonUniformType = hasNonUniformType;
-            result.isPartial = isPartial;
             result.declarations = declarations;
-            result.isReadonly = isReadonly;
-            result.type = containingType.flags & TypeFlags.Union ? getUnionType(propTypes) : getIntersectionType(propTypes);
+            result.type = isUnion ? getUnionType(propTypes) : getIntersectionType(propTypes);
             return result;
         }
 
@@ -4501,12 +6077,12 @@ namespace ts {
         // these partial properties when identifying discriminant properties, but otherwise they are filtered out
         // and do not appear to be present in the union type.
         function getUnionOrIntersectionProperty(type: UnionOrIntersectionType, name: string): Symbol {
-            const properties = type.resolvedProperties || (type.resolvedProperties = createMap<Symbol>());
-            let property = properties[name];
+            const properties = type.propertyCache || (type.propertyCache = createMap<Symbol>());
+            let property = properties.get(name);
             if (!property) {
                 property = createUnionOrIntersectionProperty(type, name);
                 if (property) {
-                    properties[name] = property;
+                    properties.set(name, property);
                 }
             }
             return property;
@@ -4515,7 +6091,7 @@ namespace ts {
         function getPropertyOfUnionOrIntersectionType(type: UnionOrIntersectionType, name: string): Symbol {
             const property = getUnionOrIntersectionProperty(type, name);
             // We need to filter out partial properties in union types
-            return property && !(property.flags & SymbolFlags.SyntheticProperty && (<TransientSymbol>property).isPartial) ? property : undefined;
+            return property && !(getCheckFlags(property) & CheckFlags.Partial) ? property : undefined;
         }
 
         /**
@@ -4526,11 +6102,11 @@ namespace ts {
          * @param type a type to look up property from
          * @param name a name of property to look up in a given type
          */
-        function getPropertyOfType(type: Type, name: string): Symbol {
+        function getPropertyOfType(type: Type, name: string): Symbol | undefined {
             type = getApparentType(type);
-            if (type.flags & TypeFlags.ObjectType) {
-                const resolved = resolveStructuredTypeMembers(type);
-                const symbol = resolved.members[name];
+            if (type.flags & TypeFlags.Object) {
+                const resolved = resolveStructuredTypeMembers(<ObjectType>type);
+                const symbol = resolved.members.get(name);
                 if (symbol && symbolIsValue(symbol)) {
                     return symbol;
                 }
@@ -4564,14 +6140,14 @@ namespace ts {
             return getSignaturesOfStructuredType(getApparentType(type), kind);
         }
 
-        function getIndexInfoOfStructuredType(type: Type, kind: IndexKind): IndexInfo {
+        function getIndexInfoOfStructuredType(type: Type, kind: IndexKind): IndexInfo | undefined {
             if (type.flags & TypeFlags.StructuredType) {
                 const resolved = resolveStructuredTypeMembers(<ObjectType>type);
                 return kind === IndexKind.String ? resolved.stringIndexInfo : resolved.numberIndexInfo;
             }
         }
 
-        function getIndexTypeOfStructuredType(type: Type, kind: IndexKind): Type {
+        function getIndexTypeOfStructuredType(type: Type, kind: IndexKind): Type | undefined {
             const info = getIndexInfoOfStructuredType(type, kind);
             return info && info.type;
         }
@@ -4603,24 +6179,16 @@ namespace ts {
             return undefined;
         }
 
-        function getTypeParametersFromJSDocTemplate(declaration: SignatureDeclaration): TypeParameter[] {
-            if (declaration.flags & NodeFlags.JavaScriptFile) {
-                const templateTag = getJSDocTemplateTag(declaration);
-                if (templateTag) {
-                    return getTypeParametersFromDeclaration(templateTag.typeParameters);
-                }
-            }
-
-            return undefined;
-        }
-
         // Return list of type parameters with duplicates removed (duplicate identifier errors are generated in the actual
         // type checking functions).
-        function getTypeParametersFromDeclaration(typeParameterDeclarations: TypeParameterDeclaration[]): TypeParameter[] {
-            const result: TypeParameter[] = [];
-            forEach(typeParameterDeclarations, node => {
+        function getTypeParametersFromDeclaration(declaration: DeclarationWithTypeParameters): TypeParameter[] {
+            let result: TypeParameter[];
+            forEach(getEffectiveTypeParameterDeclarations(declaration), node => {
                 const tp = getDeclaredTypeOfTypeParameter(node.symbol);
                 if (!contains(result, tp)) {
+                    if (!result) {
+                        result = [];
+                    }
                     result.push(tp);
                 }
             });
@@ -4629,11 +6197,11 @@ namespace ts {
 
         function symbolsToArray(symbols: SymbolTable): Symbol[] {
             const result: Symbol[] = [];
-            for (const id in symbols) {
+            symbols.forEach((symbol, id) => {
                 if (!isReservedMemberName(id)) {
-                    result.push(symbols[id]);
+                    result.push(symbol);
                 }
-            }
+            });
             return result;
         }
 
@@ -4642,20 +6210,30 @@ namespace ts {
                 if (node.type && node.type.kind === SyntaxKind.JSDocOptionalType) {
                     return true;
                 }
+                const paramTags = getJSDocParameterTags(node);
+                if (paramTags) {
+                    for (const paramTag of paramTags) {
+                        if (paramTag.isBracketed) {
+                            return true;
+                        }
 
-                const paramTag = getCorrespondingJSDocParameterTag(node);
-                if (paramTag) {
-                    if (paramTag.isBracketed) {
-                        return true;
-                    }
-
-                    if (paramTag.typeExpression) {
-                        return paramTag.typeExpression.type.kind === SyntaxKind.JSDocOptionalType;
+                        if (paramTag.typeExpression) {
+                            return paramTag.typeExpression.type.kind === SyntaxKind.JSDocOptionalType;
+                        }
                     }
                 }
             }
         }
 
+        function tryFindAmbientModule(moduleName: string, withAugmentations: boolean) {
+            if (isExternalModuleNameRelative(moduleName)) {
+                return undefined;
+            }
+            const symbol = getSymbol(globals, `"${moduleName}"`, SymbolFlags.ValueModule);
+            // merged symbol is module declaration symbol combined with all augmentations
+            return symbol && withAugmentations ? getMergedSymbol(symbol) : symbol;
+        }
+
         function isOptionalParameter(node: ParameterDeclaration) {
             if (hasQuestionToken(node) || isJSDocOptionalParameter(node)) {
                 return true;
@@ -4668,6 +6246,12 @@ namespace ts {
                 Debug.assert(parameterIndex >= 0);
                 return parameterIndex >= signature.minArgumentCount;
             }
+            const iife = getImmediatelyInvokedFunctionExpression(node.parent);
+            if (iife) {
+                return !node.type &&
+                    !node.dotDotDotToken &&
+                    indexOf((node.parent as SignatureDeclaration).parameters, node) >= iife.arguments.length;
+            }
 
             return false;
         }
@@ -4690,20 +6274,72 @@ namespace ts {
             }
         }
 
+        /**
+         * Gets the minimum number of type arguments needed to satisfy all non-optional type
+         * parameters.
+         */
+        function getMinTypeArgumentCount(typeParameters: TypeParameter[] | undefined): number {
+            let minTypeArgumentCount = 0;
+            if (typeParameters) {
+                for (let i = 0; i < typeParameters.length; i++) {
+                    if (!getDefaultFromTypeParameter(typeParameters[i])) {
+                        minTypeArgumentCount = i + 1;
+                    }
+                }
+            }
+            return minTypeArgumentCount;
+        }
+
+        /**
+         * Fill in default types for unsupplied type arguments. If `typeArguments` is undefined
+         * when a default type is supplied, a new array will be created and returned.
+         *
+         * @param typeArguments The supplied type arguments.
+         * @param typeParameters The requested type parameters.
+         * @param minTypeArgumentCount The minimum number of required type arguments.
+         */
+        function fillMissingTypeArguments(typeArguments: Type[] | undefined, typeParameters: TypeParameter[] | undefined, minTypeArgumentCount: number, location?: Node) {
+            const numTypeParameters = length(typeParameters);
+            if (numTypeParameters) {
+                const numTypeArguments = length(typeArguments);
+                const isJavaScript = isInJavaScriptFile(location);
+                if ((isJavaScript || numTypeArguments >= minTypeArgumentCount) && numTypeArguments <= numTypeParameters) {
+                    if (!typeArguments) {
+                        typeArguments = [];
+                    }
+
+                    // Map an unsatisfied type parameter with a default type.
+                    // If a type parameter does not have a default type, or if the default type
+                    // is a forward reference, the empty object type is used.
+                    for (let i = numTypeArguments; i < numTypeParameters; i++) {
+                        typeArguments[i] = isJavaScript ? anyType : emptyObjectType;
+                    }
+                    for (let i = numTypeArguments; i < numTypeParameters; i++) {
+                        const mapper = createTypeMapper(typeParameters, typeArguments);
+                        const defaultType = getDefaultFromTypeParameter(typeParameters[i]);
+                        typeArguments[i] = defaultType ? instantiateType(defaultType, mapper) : isJavaScript ? anyType : emptyObjectType;
+                    }
+                }
+            }
+            return typeArguments;
+        }
+
         function getSignatureFromDeclaration(declaration: SignatureDeclaration): Signature {
             const links = getNodeLinks(declaration);
             if (!links.resolvedSignature) {
                 const parameters: Symbol[] = [];
                 let hasLiteralTypes = false;
-                let minArgumentCount = -1;
+                let minArgumentCount = 0;
                 let thisParameter: Symbol = undefined;
                 let hasThisParameter: boolean;
+                const iife = getImmediatelyInvokedFunctionExpression(declaration);
                 const isJSConstructSignature = isJSDocConstructSignature(declaration);
+                const isUntypedSignatureInJSFile = !iife && !isJSConstructSignature && isInJavaScriptFile(declaration) && !hasJSDocParameterTags(declaration);
 
                 // If this is a JSDoc construct signature, then skip the first parameter in the
                 // parameter list.  The first parameter represents the return type of the construct
                 // signature.
-                for (let i = isJSConstructSignature ? 1 : 0, n = declaration.parameters.length; i < n; i++) {
+                for (let i = isJSConstructSignature ? 1 : 0; i < declaration.parameters.length; i++) {
                     const param = declaration.parameters[i];
 
                     let paramSymbol = param.symbol;
@@ -4724,14 +6360,13 @@ namespace ts {
                         hasLiteralTypes = true;
                     }
 
-                    if (param.initializer || param.questionToken || param.dotDotDotToken || isJSDocOptionalParameter(param)) {
-                        if (minArgumentCount < 0) {
-                            minArgumentCount = i - (hasThisParameter ? 1 : 0);
-                        }
-                    }
-                    else {
-                        // If we see any required parameters, it means the prior ones were not in fact optional.
-                        minArgumentCount = -1;
+                    // Record a new minimum argument count if this is not an optional parameter
+                    const isOptionalParameter = param.initializer || param.questionToken || param.dotDotDotToken ||
+                        iife && parameters.length > iife.arguments.length && !param.type ||
+                        isJSDocOptionalParameter(param) ||
+                        isUntypedSignatureInJSFile;
+                    if (!isOptionalParameter) {
+                        minArgumentCount = parameters.length;
                     }
                 }
 
@@ -4740,60 +6375,52 @@ namespace ts {
                     !hasDynamicName(declaration) &&
                     (!hasThisParameter || !thisParameter)) {
                     const otherKind = declaration.kind === SyntaxKind.GetAccessor ? SyntaxKind.SetAccessor : SyntaxKind.GetAccessor;
-                    const other = <AccessorDeclaration>getDeclarationOfKind(declaration.symbol, otherKind);
+                    const other = getDeclarationOfKind<AccessorDeclaration>(declaration.symbol, otherKind);
                     if (other) {
                         thisParameter = getAnnotatedAccessorThisParameter(other);
                     }
                 }
 
-                if (minArgumentCount < 0) {
-                    minArgumentCount = declaration.parameters.length - (hasThisParameter ? 1 : 0);
-                }
-                if (isJSConstructSignature) {
-                    minArgumentCount--;
-                }
-                if (!thisParameter && isObjectLiteralMethod(declaration)) {
-                    thisParameter = getContextualThisParameter(declaration);
-                }
-
                 const classType = declaration.kind === SyntaxKind.Constructor ?
                     getDeclaredTypeOfClassOrInterface(getMergedSymbol((<ClassDeclaration>declaration.parent).symbol))
                     : undefined;
-                const typeParameters = classType ? classType.localTypeParameters :
-                    declaration.typeParameters ? getTypeParametersFromDeclaration(declaration.typeParameters) :
-                        getTypeParametersFromJSDocTemplate(declaration);
-                const returnType = getSignatureReturnTypeFromDeclaration(declaration, minArgumentCount, isJSConstructSignature, classType);
+                const typeParameters = classType ? classType.localTypeParameters : getTypeParametersFromDeclaration(declaration);
+                const returnType = getSignatureReturnTypeFromDeclaration(declaration, isJSConstructSignature, classType);
                 const typePredicate = declaration.type && declaration.type.kind === SyntaxKind.TypePredicate ?
                     createTypePredicateFromTypePredicateNode(declaration.type as TypePredicateNode) :
                     undefined;
+                // JS functions get a free rest parameter if they reference `arguments`
+                let hasRestLikeParameter = hasRestParameter(declaration);
+                if (!hasRestLikeParameter && isInJavaScriptFile(declaration) && !hasJSDocParameterTags(declaration) && containsArgumentsReference(declaration)) {
+                    hasRestLikeParameter = true;
+                    const syntheticArgsSymbol = createSymbol(SymbolFlags.Variable, "args");
+                    syntheticArgsSymbol.type = anyArrayType;
+                    syntheticArgsSymbol.isRestParameter = true;
+                    parameters.push(syntheticArgsSymbol);
+                }
 
-                links.resolvedSignature = createSignature(declaration, typeParameters, thisParameter, parameters, returnType, typePredicate, minArgumentCount, hasRestParameter(declaration), hasLiteralTypes);
+                links.resolvedSignature = createSignature(declaration, typeParameters, thisParameter, parameters, returnType, typePredicate, minArgumentCount, hasRestLikeParameter, hasLiteralTypes);
             }
             return links.resolvedSignature;
         }
 
-        function getSignatureReturnTypeFromDeclaration(declaration: SignatureDeclaration, minArgumentCount: number, isJSConstructSignature: boolean, classType: Type) {
+        function getSignatureReturnTypeFromDeclaration(declaration: SignatureDeclaration, isJSConstructSignature: boolean, classType: Type) {
             if (isJSConstructSignature) {
                 return getTypeFromTypeNode(declaration.parameters[0].type);
             }
             else if (classType) {
                 return classType;
             }
-            else if (declaration.type) {
-                return getTypeFromTypeNode(declaration.type);
-            }
 
-            if (declaration.flags & NodeFlags.JavaScriptFile) {
-                const type = getReturnTypeFromJSDocComment(declaration);
-                if (type && type !== unknownType) {
-                    return type;
-                }
+            const typeNode = getEffectiveReturnTypeNode(declaration);
+            if (typeNode) {
+                return getTypeFromTypeNode(typeNode);
             }
 
             // TypeScript 1.0 spec (April 2014):
             // If only one accessor includes a type annotation, the other behaves as if it had the same type annotation.
             if (declaration.kind === SyntaxKind.GetAccessor && !hasDynamicName(declaration)) {
-                const setter = <AccessorDeclaration>getDeclarationOfKind(declaration.symbol, SyntaxKind.SetAccessor);
+                const setter = getDeclarationOfKind<AccessorDeclaration>(declaration.symbol, SyntaxKind.SetAccessor);
                 return getAnnotatedAccessorType(setter);
             }
 
@@ -4802,10 +6429,41 @@ namespace ts {
             }
         }
 
+        function containsArgumentsReference(declaration: SignatureDeclaration): boolean {
+            const links = getNodeLinks(declaration);
+            if (links.containsArgumentsReference === undefined) {
+                if (links.flags & NodeCheckFlags.CaptureArguments) {
+                    links.containsArgumentsReference = true;
+                }
+                else {
+                    links.containsArgumentsReference = traverse((declaration as FunctionLikeDeclaration).body);
+                }
+            }
+            return links.containsArgumentsReference;
+
+            function traverse(node: Node): boolean {
+                if (!node) return false;
+                switch (node.kind) {
+                    case SyntaxKind.Identifier:
+                        return (<Identifier>node).text === "arguments" && isPartOfExpression(node);
+
+                    case SyntaxKind.PropertyDeclaration:
+                    case SyntaxKind.MethodDeclaration:
+                    case SyntaxKind.GetAccessor:
+                    case SyntaxKind.SetAccessor:
+                        return (<NamedDeclaration>node).name.kind === SyntaxKind.ComputedPropertyName
+                            && traverse((<NamedDeclaration>node).name);
+
+                    default:
+                        return !nodeStartsNewLexicalEnvironment(node) && !isPartOfTypeNode(node) && forEachChild(node, traverse);
+                }
+            }
+        }
+
         function getSignaturesOfSymbol(symbol: Symbol): Signature[] {
             if (!symbol) return emptyArray;
             const result: Signature[] = [];
-            for (let i = 0, len = symbol.declarations.length; i < len; i++) {
+            for (let i = 0; i < symbol.declarations.length; i++) {
                 const node = symbol.declarations[i];
                 switch (node.kind) {
                     case SyntaxKind.FunctionType:
@@ -4872,10 +6530,11 @@ namespace ts {
                 }
                 if (!popTypeResolution()) {
                     type = anyType;
-                    if (compilerOptions.noImplicitAny) {
+                    if (noImplicitAny) {
                         const declaration = <Declaration>signature.declaration;
-                        if (declaration.name) {
-                            error(declaration.name, Diagnostics._0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions, declarationNameToString(declaration.name));
+                        const name = getNameOfDeclaration(declaration);
+                        if (name) {
+                            error(name, Diagnostics._0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions, declarationNameToString(name));
                         }
                         else {
                             error(declaration, Diagnostics.Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions);
@@ -4890,7 +6549,7 @@ namespace ts {
         function getRestTypeOfSignature(signature: Signature): Type {
             if (signature.hasRestParameter) {
                 const type = getTypeOfSymbol(lastOrUndefined(signature.parameters));
-                if (type.flags & TypeFlags.Reference && (<TypeReference>type).target === globalArrayType) {
+                if (getObjectFlags(type) & ObjectFlags.Reference && (<TypeReference>type).target === globalArrayType) {
                     return (<TypeReference>type).typeArguments[0];
                 }
             }
@@ -4898,6 +6557,17 @@ namespace ts {
         }
 
         function getSignatureInstantiation(signature: Signature, typeArguments: Type[]): Signature {
+            typeArguments = fillMissingTypeArguments(typeArguments, signature.typeParameters, getMinTypeArgumentCount(signature.typeParameters));
+            const instantiations = signature.instantiations || (signature.instantiations = createMap<Signature>());
+            const id = getTypeListId(typeArguments);
+            let instantiation = instantiations.get(id);
+            if (!instantiation) {
+                instantiations.set(id, instantiation = createSignatureInstantiation(signature, typeArguments));
+            }
+            return instantiation;
+        }
+
+        function createSignatureInstantiation(signature: Signature, typeArguments: Type[]): Signature {
             return instantiateSignature(signature, createTypeMapper(signature.typeParameters, typeArguments), /*eraseTypeParameters*/ true);
         }
 
@@ -4916,7 +6586,7 @@ namespace ts {
             // will result in a different declaration kind.
             if (!signature.isolatedSignatureType) {
                 const isConstructor = signature.declaration.kind === SyntaxKind.Constructor || signature.declaration.kind === SyntaxKind.ConstructSignature;
-                const type = <ResolvedType>createObjectType(TypeFlags.Anonymous);
+                const type = <ResolvedType>createObjectType(ObjectFlags.Anonymous);
                 type.members = emptySymbols;
                 type.properties = emptyArray;
                 type.callSignatures = !isConstructor ? [signature] : emptyArray;
@@ -4928,7 +6598,7 @@ namespace ts {
         }
 
         function getIndexSymbol(symbol: Symbol): Symbol {
-            return symbol.members["__index"];
+            return symbol.members.get("__index");
         }
 
         function getIndexDeclarationOfSymbol(symbol: Symbol, kind: IndexKind): SignatureDeclaration {
@@ -4963,23 +6633,10 @@ namespace ts {
         }
 
         function getConstraintDeclaration(type: TypeParameter) {
-            return (<TypeParameterDeclaration>getDeclarationOfKind(type.symbol, SyntaxKind.TypeParameter)).constraint;
-        }
-
-        function hasConstraintReferenceTo(type: Type, target: TypeParameter): boolean {
-            let checked: Type[];
-            while (type && !(type.flags & TypeFlags.ThisType) && type.flags & TypeFlags.TypeParameter && !contains(checked, type)) {
-                if (type === target) {
-                    return true;
-                }
-                (checked || (checked = [])).push(type);
-                const constraintDeclaration = getConstraintDeclaration(<TypeParameter>type);
-                type = constraintDeclaration && getTypeFromTypeNode(constraintDeclaration);
-            }
-            return false;
+            return getDeclarationOfKind<TypeParameterDeclaration>(type.symbol, SyntaxKind.TypeParameter).constraint;
         }
 
-        function getConstraintOfTypeParameter(typeParameter: TypeParameter): Type {
+        function getConstraintFromTypeParameter(typeParameter: TypeParameter): Type {
             if (!typeParameter.constraint) {
                 if (typeParameter.target) {
                     const targetConstraint = getConstraintOfTypeParameter(typeParameter.target);
@@ -4987,12 +6644,7 @@ namespace ts {
                 }
                 else {
                     const constraintDeclaration = getConstraintDeclaration(typeParameter);
-                    let constraint = getTypeFromTypeNode(constraintDeclaration);
-                    if (hasConstraintReferenceTo(constraint, typeParameter)) {
-                        error(constraintDeclaration, Diagnostics.Type_parameter_0_has_a_circular_constraint, typeToString(typeParameter));
-                        constraint = unknownType;
-                    }
-                    typeParameter.constraint = constraint;
+                    typeParameter.constraint = constraintDeclaration ? getTypeFromTypeNode(constraintDeclaration) : noConstraintType;
                 }
             }
             return typeParameter.constraint === noConstraintType ? undefined : typeParameter.constraint;
@@ -5042,11 +6694,11 @@ namespace ts {
 
         function createTypeReference(target: GenericType, typeArguments: Type[]): TypeReference {
             const id = getTypeListId(typeArguments);
-            let type = target.instantiations[id];
+            let type = target.instantiations.get(id);
             if (!type) {
-                const propagatedFlags = typeArguments ? getPropagatingFlagsOfTypes(typeArguments, /*excludeKinds*/ 0) : 0;
-                const flags = TypeFlags.Reference | propagatedFlags;
-                type = target.instantiations[id] = <TypeReference>createObjectType(flags, target.symbol);
+                type = <TypeReference>createObjectType(ObjectFlags.Reference, target.symbol);
+                target.instantiations.set(id, type);
+                type.flags |= typeArguments ? getPropagatingFlagsOfTypes(typeArguments, /*excludeKinds*/ 0) : 0;
                 type.target = target;
                 type.typeArguments = typeArguments;
             }
@@ -5054,29 +6706,42 @@ namespace ts {
         }
 
         function cloneTypeReference(source: TypeReference): TypeReference {
-            const type = <TypeReference>createObjectType(source.flags, source.symbol);
+            const type = <TypeReference>createType(source.flags);
+            type.symbol = source.symbol;
+            type.objectFlags = source.objectFlags;
             type.target = source.target;
             type.typeArguments = source.typeArguments;
             return type;
         }
 
         function getTypeReferenceArity(type: TypeReference): number {
-            return type.target.typeParameters ? type.target.typeParameters.length : 0;
+            return length(type.target.typeParameters);
         }
 
-        // Get type from reference to class or interface
-        function getTypeFromClassOrInterfaceReference(node: TypeReferenceNode | ExpressionWithTypeArguments | JSDocTypeReference, symbol: Symbol): Type {
+        /**
+         * Get type from type-reference that reference to class or interface
+         */
+        function getTypeFromClassOrInterfaceReference(node: TypeReferenceType, symbol: Symbol, typeArgs: Type[]): Type {
             const type = <InterfaceType>getDeclaredTypeOfSymbol(getMergedSymbol(symbol));
             const typeParameters = type.localTypeParameters;
             if (typeParameters) {
-                if (!node.typeArguments || node.typeArguments.length !== typeParameters.length) {
-                    error(node, Diagnostics.Generic_type_0_requires_1_type_argument_s, typeToString(type, /*enclosingDeclaration*/ undefined, TypeFormatFlags.WriteArrayAsGenericType), typeParameters.length);
+                const numTypeArguments = length(node.typeArguments);
+                const minTypeArgumentCount = getMinTypeArgumentCount(typeParameters);
+                if (!isInJavaScriptFile(node) && (numTypeArguments < minTypeArgumentCount || numTypeArguments > typeParameters.length)) {
+                    error(node,
+                        minTypeArgumentCount === typeParameters.length
+                            ? Diagnostics.Generic_type_0_requires_1_type_argument_s
+                            : Diagnostics.Generic_type_0_requires_between_1_and_2_type_arguments,
+                        typeToString(type, /*enclosingDeclaration*/ undefined, TypeFormatFlags.WriteArrayAsGenericType),
+                        minTypeArgumentCount,
+                        typeParameters.length);
                     return unknownType;
                 }
                 // In a type reference, the outer type parameters of the referenced class or interface are automatically
                 // supplied as type arguments and the type reference only specifies arguments for the local type parameters
                 // of the class or interface.
-                return createTypeReference(<GenericType>type, concatenate(type.outerTypeParameters, map(node.typeArguments, getTypeFromTypeNodeNoAlias)));
+                const typeArguments = concatenate(type.outerTypeParameters, fillMissingTypeArguments(typeArgs, typeParameters, minTypeArgumentCount, node));
+                return createTypeReference(<GenericType>type, typeArguments);
             }
             if (node.typeArguments) {
                 error(node, Diagnostics.Type_0_is_not_generic, typeToString(type));
@@ -5085,21 +6750,40 @@ namespace ts {
             return type;
         }
 
-        // Get type from reference to type alias. When a type alias is generic, the declared type of the type alias may include
-        // references to the type parameters of the alias. We replace those with the actual type arguments by instantiating the
-        // declared type. Instantiations are cached using the type identities of the type arguments as the key.
-        function getTypeFromTypeAliasReference(node: TypeReferenceNode | ExpressionWithTypeArguments | JSDocTypeReference, symbol: Symbol): Type {
+        function getTypeAliasInstantiation(symbol: Symbol, typeArguments: Type[]): Type {
             const type = getDeclaredTypeOfSymbol(symbol);
             const links = getSymbolLinks(symbol);
             const typeParameters = links.typeParameters;
+            const id = getTypeListId(typeArguments);
+            let instantiation = links.instantiations.get(id);
+            if (!instantiation) {
+                links.instantiations.set(id, instantiation = instantiateTypeNoAlias(type, createTypeMapper(typeParameters, fillMissingTypeArguments(typeArguments, typeParameters, getMinTypeArgumentCount(typeParameters)))));
+            }
+            return instantiation;
+        }
+
+        /**
+         * Get type from reference to type alias. When a type alias is generic, the declared type of the type alias may include
+         * references to the type parameters of the alias. We replace those with the actual type arguments by instantiating the
+         * declared type. Instantiations are cached using the type identities of the type arguments as the key.
+         */
+        function getTypeFromTypeAliasReference(node: TypeReferenceType, symbol: Symbol, typeArguments: Type[]): Type {
+            const type = getDeclaredTypeOfSymbol(symbol);
+            const typeParameters = getSymbolLinks(symbol).typeParameters;
             if (typeParameters) {
-                if (!node.typeArguments || node.typeArguments.length !== typeParameters.length) {
-                    error(node, Diagnostics.Generic_type_0_requires_1_type_argument_s, symbolToString(symbol), typeParameters.length);
+                const numTypeArguments = length(node.typeArguments);
+                const minTypeArgumentCount = getMinTypeArgumentCount(typeParameters);
+                if (numTypeArguments < minTypeArgumentCount || numTypeArguments > typeParameters.length) {
+                    error(node,
+                        minTypeArgumentCount === typeParameters.length
+                            ? Diagnostics.Generic_type_0_requires_1_type_argument_s
+                            : Diagnostics.Generic_type_0_requires_between_1_and_2_type_arguments,
+                        symbolToString(symbol),
+                        minTypeArgumentCount,
+                        typeParameters.length);
                     return unknownType;
                 }
-                const typeArguments = map(node.typeArguments, getTypeFromTypeNodeNoAlias);
-                const id = getTypeListId(typeArguments);
-                return links.instantiations[id] || (links.instantiations[id] = instantiateType(type, createTypeMapper(typeParameters, typeArguments)));
+                return getTypeAliasInstantiation(symbol, typeArguments);
             }
             if (node.typeArguments) {
                 error(node, Diagnostics.Type_0_is_not_generic, symbolToString(symbol));
@@ -5108,8 +6792,10 @@ namespace ts {
             return type;
         }
 
-        // Get type from reference to named type that cannot be generic (enum or type parameter)
-        function getTypeFromNonGenericTypeReference(node: TypeReferenceNode | ExpressionWithTypeArguments | JSDocTypeReference, symbol: Symbol): Type {
+        /**
+         * Get type from reference to named type that cannot be generic (enum or type parameter)
+         */
+        function getTypeFromNonGenericTypeReference(node: TypeReferenceType, symbol: Symbol): Type {
             if (node.typeArguments) {
                 error(node, Diagnostics.Type_0_is_not_generic, symbolToString(symbol));
                 return unknownType;
@@ -5117,7 +6803,7 @@ namespace ts {
             return getDeclaredTypeOfSymbol(symbol);
         }
 
-        function getTypeReferenceName(node: TypeReferenceNode | ExpressionWithTypeArguments | JSDocTypeReference): EntityNameOrEntityNameExpression | undefined {
+        function getTypeReferenceName(node: TypeReferenceType): EntityNameOrEntityNameExpression | undefined {
             switch (node.kind) {
                 case SyntaxKind.TypeReference:
                     return (<TypeReferenceNode>node).typeName;
@@ -5137,62 +6823,107 @@ namespace ts {
             return undefined;
         }
 
-        function resolveTypeReferenceName(
-            node: TypeReferenceNode | ExpressionWithTypeArguments | JSDocTypeReference,
-            typeReferenceName: EntityNameExpression | EntityName) {
-
+        function resolveTypeReferenceName(typeReferenceName: EntityNameExpression | EntityName, meaning: SymbolFlags) {
             if (!typeReferenceName) {
                 return unknownSymbol;
             }
 
-            return resolveEntityName(typeReferenceName, SymbolFlags.Type) || unknownSymbol;
+            return resolveEntityName(typeReferenceName, meaning) || unknownSymbol;
         }
 
-        function getTypeReferenceType(node: TypeReferenceNode | ExpressionWithTypeArguments | JSDocTypeReference, symbol: Symbol) {
+        function getTypeReferenceType(node: TypeReferenceType, symbol: Symbol) {
+            const typeArguments = typeArgumentsFromTypeReferenceNode(node); // Do unconditionally so we mark type arguments as referenced.
             if (symbol === unknownSymbol) {
                 return unknownType;
             }
 
-            if (symbol.flags & (SymbolFlags.Class | SymbolFlags.Interface)) {
-                return getTypeFromClassOrInterfaceReference(node, symbol);
-            }
-
-            if (symbol.flags & SymbolFlags.TypeAlias) {
-                return getTypeFromTypeAliasReference(node, symbol);
+            const type = getTypeReferenceTypeWorker(node, symbol, typeArguments);
+            if (type) {
+                return type;
             }
 
             if (symbol.flags & SymbolFlags.Value && node.kind === SyntaxKind.JSDocTypeReference) {
-                // A JSDocTypeReference may have resolved to a value (as opposed to a type). In
-                // that case, the type of this reference is just the type of the value we resolved
-                // to.
-                return getTypeOfSymbol(symbol);
+                // A JSDocTypeReference may have resolved to a value (as opposed to a type). If
+                // the symbol is a constructor function, return the inferred class type; otherwise,
+                // the type of this reference is just the type of the value we resolved to.
+                const valueType = getTypeOfSymbol(symbol);
+                if (valueType.symbol && !isInferredClassType(valueType)) {
+                    const referenceType = getTypeReferenceTypeWorker(node, valueType.symbol, typeArguments);
+                    if (referenceType) {
+                        return referenceType;
+                    }
+                }
+
+                // Resolve the type reference as a Type for the purpose of reporting errors.
+                resolveTypeReferenceName(getTypeReferenceName(node), SymbolFlags.Type);
+                return valueType;
             }
 
             return getTypeFromNonGenericTypeReference(node, symbol);
         }
 
-        function getTypeFromTypeReference(node: TypeReferenceNode | ExpressionWithTypeArguments | JSDocTypeReference): Type {
+        function getTypeReferenceTypeWorker(node: TypeReferenceType, symbol: Symbol, typeArguments: Type[]): Type | undefined {
+            if (symbol.flags & (SymbolFlags.Class | SymbolFlags.Interface)) {
+                return getTypeFromClassOrInterfaceReference(node, symbol, typeArguments);
+            }
+
+            if (symbol.flags & SymbolFlags.TypeAlias) {
+                return getTypeFromTypeAliasReference(node, symbol, typeArguments);
+            }
+
+            if (symbol.flags & SymbolFlags.Function && node.kind === SyntaxKind.JSDocTypeReference && (symbol.members || getJSDocClassTag(symbol.valueDeclaration))) {
+                return getInferredClassType(symbol);
+            }
+        }
+
+        function getPrimitiveTypeFromJSDocTypeReference(node: JSDocTypeReference): Type {
+            if (isIdentifier(node.name)) {
+                switch (node.name.text) {
+                    case "String":
+                        return stringType;
+                    case "Number":
+                        return numberType;
+                    case "Boolean":
+                        return booleanType;
+                    case "Void":
+                        return voidType;
+                    case "Undefined":
+                        return undefinedType;
+                    case "Null":
+                        return nullType;
+                    case "Object":
+                        return anyType;
+                    case "Function":
+                    case "function":
+                        return globalFunctionType;
+                    case "Array":
+                    case "array":
+                        return !node.typeArguments || !node.typeArguments.length ? createArrayType(anyType) : undefined;
+                    case "Promise":
+                    case "promise":
+                        return !node.typeArguments || !node.typeArguments.length ? createPromiseType(anyType) : undefined;
+                }
+            }
+        }
+
+        function getTypeFromJSDocNullableTypeNode(node: JSDocNullableType) {
+            const type = getTypeFromTypeNode(node.type);
+            return strictNullChecks ? getUnionType([type, nullType]) : type;
+        }
+
+        function getTypeFromTypeReference(node: TypeReferenceType): Type {
             const links = getNodeLinks(node);
             if (!links.resolvedType) {
                 let symbol: Symbol;
                 let type: Type;
+                let meaning = SymbolFlags.Type;
                 if (node.kind === SyntaxKind.JSDocTypeReference) {
-                    const typeReferenceName = getTypeReferenceName(node);
-                    symbol = resolveTypeReferenceName(node, typeReferenceName);
-                    type = getTypeReferenceType(node, symbol);
+                    type = getPrimitiveTypeFromJSDocTypeReference(node);
+                    meaning |= SymbolFlags.Value;
                 }
-                else {
-                    // We only support expressions that are simple qualified names. For other expressions this produces undefined.
-                    const typeNameOrExpression: EntityNameOrEntityNameExpression = node.kind === SyntaxKind.TypeReference
-                        ? (<TypeReferenceNode>node).typeName
-                        : isEntityNameExpression((<ExpressionWithTypeArguments>node).expression)
-                            ? <EntityNameExpression>(<ExpressionWithTypeArguments>node).expression
-                            : undefined;
-                    symbol = typeNameOrExpression && resolveEntityName(typeNameOrExpression, SymbolFlags.Type) || unknownSymbol;
-                    type = symbol === unknownSymbol ? unknownType :
-                        symbol.flags & (SymbolFlags.Class | SymbolFlags.Interface) ? getTypeFromClassOrInterfaceReference(node, symbol) :
-                            symbol.flags & SymbolFlags.TypeAlias ? getTypeFromTypeAliasReference(node, symbol) :
-                                getTypeFromNonGenericTypeReference(node, symbol);
+                if (!type) {
+                    symbol = resolveTypeReferenceName(getTypeReferenceName(node), meaning);
+                    type = getTypeReferenceType(node, symbol);
                 }
                 // Cache both the resolved symbol and the resolved type. The resolved symbol is needed in when we check the
                 // type reference in checkTypeReferenceOrExpressionWithTypeArguments.
@@ -5202,6 +6933,10 @@ namespace ts {
             return links.resolvedType;
         }
 
+        function typeArgumentsFromTypeReferenceNode(node: TypeReferenceType): Type[] {
+            return map(node.typeArguments, getTypeFromTypeNode);
+        }
+
         function getTypeFromTypeQueryNode(node: TypeQueryNode): Type {
             const links = getNodeLinks(node);
             if (!links.resolvedType) {
@@ -5214,49 +6949,109 @@ namespace ts {
             return links.resolvedType;
         }
 
-        function getTypeOfGlobalSymbol(symbol: Symbol, arity: number): ObjectType {
+        function getTypeOfGlobalSymbol(symbol: Symbol, arity: number): ObjectType {
+
+            function getTypeDeclaration(symbol: Symbol): Declaration {
+                const declarations = symbol.declarations;
+                for (const declaration of declarations) {
+                    switch (declaration.kind) {
+                        case SyntaxKind.ClassDeclaration:
+                        case SyntaxKind.InterfaceDeclaration:
+                        case SyntaxKind.EnumDeclaration:
+                            return declaration;
+                    }
+                }
+            }
+
+            if (!symbol) {
+                return arity ? emptyGenericType : emptyObjectType;
+            }
+            const type = getDeclaredTypeOfSymbol(symbol);
+            if (!(type.flags & TypeFlags.Object)) {
+                error(getTypeDeclaration(symbol), Diagnostics.Global_type_0_must_be_a_class_or_interface_type, symbol.name);
+                return arity ? emptyGenericType : emptyObjectType;
+            }
+            if (length((<InterfaceType>type).typeParameters) !== arity) {
+                error(getTypeDeclaration(symbol), Diagnostics.Global_type_0_must_have_1_type_parameter_s, symbol.name, arity);
+                return arity ? emptyGenericType : emptyObjectType;
+            }
+            return <ObjectType>type;
+        }
+
+        function getGlobalValueSymbol(name: string, reportErrors: boolean): Symbol {
+            return getGlobalSymbol(name, SymbolFlags.Value, reportErrors ? Diagnostics.Cannot_find_global_value_0 : undefined);
+        }
+
+        function getGlobalTypeSymbol(name: string, reportErrors: boolean): Symbol {
+            return getGlobalSymbol(name, SymbolFlags.Type, reportErrors ? Diagnostics.Cannot_find_global_type_0 : undefined);
+        }
+
+        function getGlobalSymbol(name: string, meaning: SymbolFlags, diagnostic: DiagnosticMessage): Symbol {
+            return resolveName(undefined, name, meaning, diagnostic, name);
+        }
+
+        function getGlobalType(name: string, arity: 0, reportErrors: boolean): ObjectType;
+        function getGlobalType(name: string, arity: number, reportErrors: boolean): GenericType;
+        function getGlobalType(name: string, arity: number, reportErrors: boolean): ObjectType {
+            const symbol = getGlobalTypeSymbol(name, reportErrors);
+            return symbol || reportErrors ? getTypeOfGlobalSymbol(symbol, arity) : undefined;
+        }
+
+        function getGlobalTypedPropertyDescriptorType() {
+            return deferredGlobalTypedPropertyDescriptorType || (deferredGlobalTypedPropertyDescriptorType = getGlobalType("TypedPropertyDescriptor", /*arity*/ 1, /*reportErrors*/ true)) || emptyGenericType;
+        }
+
+        function getGlobalTemplateStringsArrayType() {
+            return deferredGlobalTemplateStringsArrayType || (deferredGlobalTemplateStringsArrayType = getGlobalType("TemplateStringsArray", /*arity*/ 0, /*reportErrors*/ true)) || emptyObjectType;
+        }
+
+        function getGlobalESSymbolConstructorSymbol(reportErrors: boolean) {
+            return deferredGlobalESSymbolConstructorSymbol || (deferredGlobalESSymbolConstructorSymbol = getGlobalValueSymbol("Symbol", reportErrors));
+        }
+
+        function getGlobalESSymbolType(reportErrors: boolean) {
+            return deferredGlobalESSymbolType || (deferredGlobalESSymbolType = getGlobalType("Symbol", /*arity*/ 0, reportErrors)) || emptyObjectType;
+        }
+
+        function getGlobalPromiseType(reportErrors: boolean) {
+            return deferredGlobalPromiseType || (deferredGlobalPromiseType = getGlobalType("Promise", /*arity*/ 1, reportErrors)) || emptyGenericType;
+        }
+
+        function getGlobalPromiseConstructorSymbol(reportErrors: boolean): Symbol | undefined {
+            return deferredGlobalPromiseConstructorSymbol || (deferredGlobalPromiseConstructorSymbol = getGlobalValueSymbol("Promise", reportErrors));
+        }
+
+        function getGlobalPromiseConstructorLikeType(reportErrors: boolean) {
+            return deferredGlobalPromiseConstructorLikeType || (deferredGlobalPromiseConstructorLikeType = getGlobalType("PromiseConstructorLike", /*arity*/ 0, reportErrors)) || emptyObjectType;
+        }
+
+        function getGlobalAsyncIterableType(reportErrors: boolean) {
+            return deferredGlobalAsyncIterableType || (deferredGlobalAsyncIterableType = getGlobalType("AsyncIterable", /*arity*/ 1, reportErrors)) || emptyGenericType;
+        }
 
-            function getTypeDeclaration(symbol: Symbol): Declaration {
-                const declarations = symbol.declarations;
-                for (const declaration of declarations) {
-                    switch (declaration.kind) {
-                        case SyntaxKind.ClassDeclaration:
-                        case SyntaxKind.InterfaceDeclaration:
-                        case SyntaxKind.EnumDeclaration:
-                            return declaration;
-                    }
-                }
-            }
+        function getGlobalAsyncIteratorType(reportErrors: boolean) {
+            return deferredGlobalAsyncIteratorType || (deferredGlobalAsyncIteratorType = getGlobalType("AsyncIterator", /*arity*/ 1, reportErrors)) || emptyGenericType;
+        }
 
-            if (!symbol) {
-                return arity ? emptyGenericType : emptyObjectType;
-            }
-            const type = getDeclaredTypeOfSymbol(symbol);
-            if (!(type.flags & TypeFlags.ObjectType)) {
-                error(getTypeDeclaration(symbol), Diagnostics.Global_type_0_must_be_a_class_or_interface_type, symbol.name);
-                return arity ? emptyGenericType : emptyObjectType;
-            }
-            if (((<InterfaceType>type).typeParameters ? (<InterfaceType>type).typeParameters.length : 0) !== arity) {
-                error(getTypeDeclaration(symbol), Diagnostics.Global_type_0_must_have_1_type_parameter_s, symbol.name, arity);
-                return arity ? emptyGenericType : emptyObjectType;
-            }
-            return <ObjectType>type;
+        function getGlobalAsyncIterableIteratorType(reportErrors: boolean) {
+            return deferredGlobalAsyncIterableIteratorType || (deferredGlobalAsyncIterableIteratorType = getGlobalType("AsyncIterableIterator", /*arity*/ 1, reportErrors)) || emptyGenericType;
         }
 
-        function getGlobalValueSymbol(name: string): Symbol {
-            return getGlobalSymbol(name, SymbolFlags.Value, Diagnostics.Cannot_find_global_value_0);
+        function getGlobalIterableType(reportErrors: boolean) {
+            return deferredGlobalIterableType || (deferredGlobalIterableType = getGlobalType("Iterable", /*arity*/ 1, reportErrors)) || emptyGenericType;
         }
 
-        function getGlobalTypeSymbol(name: string): Symbol {
-            return getGlobalSymbol(name, SymbolFlags.Type, Diagnostics.Cannot_find_global_type_0);
+        function getGlobalIteratorType(reportErrors: boolean) {
+            return deferredGlobalIteratorType || (deferredGlobalIteratorType = getGlobalType("Iterator", /*arity*/ 1, reportErrors)) || emptyGenericType;
         }
 
-        function getGlobalSymbol(name: string, meaning: SymbolFlags, diagnostic: DiagnosticMessage): Symbol {
-            return resolveName(undefined, name, meaning, diagnostic, name);
+        function getGlobalIterableIteratorType(reportErrors: boolean) {
+            return deferredGlobalIterableIteratorType || (deferredGlobalIterableIteratorType = getGlobalType("IterableIterator", /*arity*/ 1, reportErrors)) || emptyGenericType;
         }
 
-        function getGlobalType(name: string, arity = 0): ObjectType {
-            return getTypeOfGlobalSymbol(getGlobalTypeSymbol(name), arity);
+        function getGlobalTypeOrUndefined(name: string, arity = 0): ObjectType {
+            const symbol = getGlobalSymbol(name, SymbolFlags.Type, /*diagnostic*/ undefined);
+            return symbol && <GenericType>getTypeOfGlobalSymbol(symbol, arity);
         }
 
         /**
@@ -5269,32 +7064,34 @@ namespace ts {
             return typeSymbol && getDeclaredTypeOfSymbol(typeSymbol);
         }
 
-        /**
-          * Creates a TypeReference for a generic `TypedPropertyDescriptor<T>`.
-          */
-        function createTypedPropertyDescriptorType(propertyType: Type): Type {
-            const globalTypedPropertyDescriptorType = getGlobalTypedPropertyDescriptorType();
-            return globalTypedPropertyDescriptorType !== emptyGenericType
-                ? createTypeReference(<GenericType>globalTypedPropertyDescriptorType, [propertyType])
-                : emptyObjectType;
-        }
-
         /**
          * Instantiates a global type that is generic with some element type, and returns that instantiation.
          */
-        function createTypeFromGenericGlobalType(genericGlobalType: GenericType, typeArguments: Type[]): Type {
+        function createTypeFromGenericGlobalType(genericGlobalType: GenericType, typeArguments: Type[]): ObjectType {
             return genericGlobalType !== emptyGenericType ? createTypeReference(genericGlobalType, typeArguments) : emptyObjectType;
         }
 
-        function createIterableType(elementType: Type): Type {
-            return createTypeFromGenericGlobalType(getGlobalIterableType(), [elementType]);
+        function createTypedPropertyDescriptorType(propertyType: Type): Type {
+            return createTypeFromGenericGlobalType(getGlobalTypedPropertyDescriptorType(), [propertyType]);
+        }
+
+        function createAsyncIterableType(iteratedType: Type): Type {
+            return createTypeFromGenericGlobalType(getGlobalAsyncIterableType(/*reportErrors*/ true), [iteratedType]);
+        }
+
+        function createAsyncIterableIteratorType(iteratedType: Type): Type {
+            return createTypeFromGenericGlobalType(getGlobalAsyncIterableIteratorType(/*reportErrors*/ true), [iteratedType]);
+        }
+
+        function createIterableType(iteratedType: Type): Type {
+            return createTypeFromGenericGlobalType(getGlobalIterableType(/*reportErrors*/ true), [iteratedType]);
         }
 
-        function createIterableIteratorType(elementType: Type): Type {
-            return createTypeFromGenericGlobalType(getGlobalIterableIteratorType(), [elementType]);
+        function createIterableIteratorType(iteratedType: Type): Type {
+            return createTypeFromGenericGlobalType(getGlobalIterableIteratorType(/*reportErrors*/ true), [iteratedType]);
         }
 
-        function createArrayType(elementType: Type): Type {
+        function createArrayType(elementType: Type): ObjectType {
             return createTypeFromGenericGlobalType(globalArrayType, [elementType]);
         }
 
@@ -5319,19 +7116,20 @@ namespace ts {
             for (let i = 0; i < arity; i++) {
                 const typeParameter = <TypeParameter>createType(TypeFlags.TypeParameter);
                 typeParameters.push(typeParameter);
-                const property = <TransientSymbol>createSymbol(SymbolFlags.Property | SymbolFlags.Transient, "" + i);
+                const property = createSymbol(SymbolFlags.Property, "" + i);
                 property.type = typeParameter;
                 properties.push(property);
             }
-            const type = <GenericType & InterfaceTypeWithDeclaredMembers>createObjectType(TypeFlags.Tuple | TypeFlags.Reference);
+            const type = <GenericType & InterfaceTypeWithDeclaredMembers>createObjectType(ObjectFlags.Tuple | ObjectFlags.Reference);
             type.typeParameters = typeParameters;
             type.outerTypeParameters = undefined;
             type.localTypeParameters = typeParameters;
             type.instantiations = createMap<TypeReference>();
-            type.instantiations[getTypeListId(type.typeParameters)] = <GenericType>type;
+            type.instantiations.set(getTypeListId(type.typeParameters), <GenericType>type);
             type.target = <GenericType>type;
             type.typeArguments = type.typeParameters;
-            type.thisType = <TypeParameter>createType(TypeFlags.TypeParameter | TypeFlags.ThisType);
+            type.thisType = <TypeParameter>createType(TypeFlags.TypeParameter);
+            type.thisType.isThisType = true;
             type.thisType.constraint = type;
             type.declaredProperties = properties;
             type.declaredCallSignatures = emptyArray;
@@ -5352,7 +7150,7 @@ namespace ts {
         function getTypeFromTupleTypeNode(node: TupleTypeNode): Type {
             const links = getNodeLinks(node);
             if (!links.resolvedType) {
-                links.resolvedType = createTupleType(map(node.elementTypes, getTypeFromTypeNodeNoAlias));
+                links.resolvedType = createTupleType(map(node.elementTypes, getTypeFromTypeNode));
             }
             return links.resolvedType;
         }
@@ -5361,10 +7159,14 @@ namespace ts {
             containsAny?: boolean;
             containsUndefined?: boolean;
             containsNull?: boolean;
+            containsNever?: boolean;
             containsNonWideningType?: boolean;
             containsString?: boolean;
             containsNumber?: boolean;
             containsStringOrNumberLiteral?: boolean;
+            containsObjectType?: boolean;
+            containsEmptyObject?: boolean;
+            unionIndex?: number;
         }
 
         function binarySearchTypes(types: Type[], type: Type): number {
@@ -5411,7 +7213,8 @@ namespace ts {
                 const len = typeSet.length;
                 const index = len && type.id > typeSet[len - 1].id ? ~len : binarySearchTypes(typeSet, type);
                 if (index < 0) {
-                    if (!(flags & TypeFlags.Anonymous && type.symbol && type.symbol.flags & (SymbolFlags.Function | SymbolFlags.Method) && containsIdenticalType(typeSet, type))) {
+                    if (!(flags & TypeFlags.Object && (<ObjectType>type).objectFlags & ObjectFlags.Anonymous &&
+                        type.symbol && type.symbol.flags & (SymbolFlags.Function | SymbolFlags.Method) && containsIdenticalType(typeSet, type))) {
                         typeSet.splice(~index, 0, type);
                     }
                 }
@@ -5436,15 +7239,34 @@ namespace ts {
         }
 
         function isSubtypeOfAny(candidate: Type, types: Type[]): boolean {
-            for (let i = 0, len = types.length; i < len; i++) {
-                if (candidate !== types[i] && isTypeSubtypeOf(candidate, types[i])) {
+            for (const type of types) {
+                if (candidate !== type && isTypeSubtypeOf(candidate, type)) {
                     return true;
                 }
             }
             return false;
         }
 
+        function isSetOfLiteralsFromSameEnum(types: TypeSet): boolean {
+            const first = types[0];
+            if (first.flags & TypeFlags.EnumLiteral) {
+                const firstEnum = getParentOfSymbol(first.symbol);
+                for (let i = 1; i < types.length; i++) {
+                    const other = types[i];
+                    if (!(other.flags & TypeFlags.EnumLiteral) || (firstEnum !== getParentOfSymbol(other.symbol))) {
+                        return false;
+                    }
+                }
+                return true;
+            }
+
+            return false;
+        }
+
         function removeSubtypes(types: TypeSet) {
+            if (types.length === 0 || isSetOfLiteralsFromSameEnum(types)) {
+                return;
+            }
             let i = types.length;
             while (i > 0) {
                 i--;
@@ -5511,10 +7333,11 @@ namespace ts {
                 return types[0];
             }
             const id = getTypeListId(types);
-            let type = unionTypes[id];
+            let type = unionTypes.get(id);
             if (!type) {
                 const propagatedFlags = getPropagatingFlagsOfTypes(types, /*excludeKinds*/ TypeFlags.Nullable);
-                type = unionTypes[id] = <UnionType>createObjectType(TypeFlags.Union | propagatedFlags);
+                type = <UnionType>createType(TypeFlags.Union | propagatedFlags);
+                unionTypes.set(id, type);
                 type.types = types;
                 type.aliasSymbol = aliasSymbol;
                 type.aliasTypeArguments = aliasTypeArguments;
@@ -5522,10 +7345,11 @@ namespace ts {
             return type;
         }
 
-        function getTypeFromUnionTypeNode(node: UnionTypeNode, aliasSymbol?: Symbol, aliasTypeArguments?: Type[]): Type {
+        function getTypeFromUnionTypeNode(node: UnionTypeNode): Type {
             const links = getNodeLinks(node);
             if (!links.resolvedType) {
-                links.resolvedType = getUnionType(map(node.types, getTypeFromTypeNodeNoAlias), /*subtypeReduction*/ false, aliasSymbol, aliasTypeArguments);
+                links.resolvedType = getUnionType(map(node.types, getTypeFromTypeNode), /*subtypeReduction*/ false,
+                    getAliasSymbolForTypeNode(node), getAliasTypeArgumentsForTypeNode(node));
             }
             return links.resolvedType;
         }
@@ -5537,8 +7361,23 @@ namespace ts {
             else if (type.flags & TypeFlags.Any) {
                 typeSet.containsAny = true;
             }
-            else if (!(type.flags & TypeFlags.Never) && (strictNullChecks || !(type.flags & TypeFlags.Nullable)) && !contains(typeSet, type)) {
-                typeSet.push(type);
+            else if (type.flags & TypeFlags.Never) {
+                typeSet.containsNever = true;
+            }
+            else if (getObjectFlags(type) & ObjectFlags.Anonymous && isEmptyObjectType(type)) {
+                typeSet.containsEmptyObject = true;
+            }
+            else if ((strictNullChecks || !(type.flags & TypeFlags.Nullable)) && !contains(typeSet, type)) {
+                if (type.flags & TypeFlags.Object) {
+                    typeSet.containsObjectType = true;
+                }
+                if (type.flags & TypeFlags.Union && typeSet.unionIndex === undefined) {
+                    typeSet.unionIndex = typeSet.length;
+                }
+                if (!(type.flags & TypeFlags.Object && (<ObjectType>type).objectFlags & ObjectFlags.Anonymous &&
+                    type.symbol && type.symbol.flags & (SymbolFlags.Function | SymbolFlags.Method) && containsIdenticalType(typeSet, type))) {
+                    typeSet.push(type);
+                }
             }
         }
 
@@ -5550,6 +7389,11 @@ namespace ts {
             }
         }
 
+        // We normalize combinations of intersection and union types based on the distributive property of the '&'
+        // operator. Specifically, because X & (A | B) is equivalent to X & A | X & B, we can transform intersection
+        // types with union type constituents into equivalent union types with intersection type constituents and
+        // effectively ensure that union types are always at the top level in type representations.
+        //
         // We do not perform structural deduplication on intersection types. Intersection types are created only by the &
         // type operator and we can't reduce those because we want to support recursive intersection types. For example,
         // a type alias of the form "type List<T> = T & { next: List<T> }" cannot be reduced during its declaration.
@@ -5561,17 +7405,32 @@ namespace ts {
             }
             const typeSet = [] as TypeSet;
             addTypesToIntersection(typeSet, types);
+            if (typeSet.containsNever) {
+                return neverType;
+            }
             if (typeSet.containsAny) {
                 return anyType;
             }
+            if (typeSet.containsEmptyObject && !typeSet.containsObjectType) {
+                typeSet.push(emptyObjectType);
+            }
             if (typeSet.length === 1) {
                 return typeSet[0];
             }
+            const unionIndex = typeSet.unionIndex;
+            if (unionIndex !== undefined) {
+                // We are attempting to construct a type of the form X & (A | B) & Y. Transform this into a type of
+                // the form X & A & Y | X & B & Y and recursively reduce until no union type constituents remain.
+                const unionType = <UnionType>typeSet[unionIndex];
+                return getUnionType(map(unionType.types, t => getIntersectionType(replaceElement(typeSet, unionIndex, t))),
+                    /*subtypeReduction*/ false, aliasSymbol, aliasTypeArguments);
+            }
             const id = getTypeListId(typeSet);
-            let type = intersectionTypes[id];
+            let type = intersectionTypes.get(id);
             if (!type) {
                 const propagatedFlags = getPropagatingFlagsOfTypes(typeSet, /*excludeKinds*/ TypeFlags.Nullable);
-                type = intersectionTypes[id] = <IntersectionType>createObjectType(TypeFlags.Intersection | propagatedFlags);
+                type = <IntersectionType>createType(TypeFlags.Intersection | propagatedFlags);
+                intersectionTypes.set(id, type);
                 type.types = typeSet;
                 type.aliasSymbol = aliasSymbol;
                 type.aliasTypeArguments = aliasTypeArguments;
@@ -5579,36 +7438,331 @@ namespace ts {
             return type;
         }
 
-        function getTypeFromIntersectionTypeNode(node: IntersectionTypeNode, aliasSymbol?: Symbol, aliasTypeArguments?: Type[]): Type {
+        function getTypeFromIntersectionTypeNode(node: IntersectionTypeNode): Type {
+            const links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = getIntersectionType(map(node.types, getTypeFromTypeNode),
+                    getAliasSymbolForTypeNode(node), getAliasTypeArgumentsForTypeNode(node));
+            }
+            return links.resolvedType;
+        }
+
+        function getIndexTypeForGenericType(type: TypeVariable | UnionOrIntersectionType) {
+            if (!type.resolvedIndexType) {
+                type.resolvedIndexType = <IndexType>createType(TypeFlags.Index);
+                type.resolvedIndexType.type = type;
+            }
+            return type.resolvedIndexType;
+        }
+
+        function getLiteralTypeFromPropertyName(prop: Symbol) {
+            return getDeclarationModifierFlagsFromSymbol(prop) & ModifierFlags.NonPublicAccessibilityModifier || startsWith(prop.name, "__@") ?
+                neverType :
+                getLiteralType(unescapeIdentifier(prop.name));
+        }
+
+        function getLiteralTypeFromPropertyNames(type: Type) {
+            return getUnionType(map(getPropertiesOfType(type), getLiteralTypeFromPropertyName));
+        }
+
+        function getIndexType(type: Type): Type {
+            return maybeTypeOfKind(type, TypeFlags.TypeVariable) ? getIndexTypeForGenericType(<TypeVariable | UnionOrIntersectionType>type) :
+                getObjectFlags(type) & ObjectFlags.Mapped ? getConstraintTypeFromMappedType(<MappedType>type) :
+                    type.flags & TypeFlags.Any || getIndexInfoOfType(type, IndexKind.String) ? stringType :
+                        getLiteralTypeFromPropertyNames(type);
+        }
+
+        function getIndexTypeOrString(type: Type): Type {
+            const indexType = getIndexType(type);
+            return indexType !== neverType ? indexType : stringType;
+        }
+
+        function getTypeFromTypeOperatorNode(node: TypeOperatorNode) {
             const links = getNodeLinks(node);
             if (!links.resolvedType) {
-                links.resolvedType = getIntersectionType(map(node.types, getTypeFromTypeNodeNoAlias), aliasSymbol, aliasTypeArguments);
+                links.resolvedType = getIndexType(getTypeFromTypeNode(node.type));
             }
             return links.resolvedType;
         }
 
-        function getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node: Node, aliasSymbol?: Symbol, aliasTypeArguments?: Type[]): Type {
+        function createIndexedAccessType(objectType: Type, indexType: Type) {
+            const type = <IndexedAccessType>createType(TypeFlags.IndexedAccess);
+            type.objectType = objectType;
+            type.indexType = indexType;
+            return type;
+        }
+
+        function getPropertyTypeForIndexType(objectType: Type, indexType: Type, accessNode: ElementAccessExpression | IndexedAccessTypeNode, cacheSymbol: boolean) {
+            const accessExpression = accessNode && accessNode.kind === SyntaxKind.ElementAccessExpression ? <ElementAccessExpression>accessNode : undefined;
+            const propName = indexType.flags & TypeFlags.StringOrNumberLiteral ?
+                "" + (<LiteralType>indexType).value :
+                accessExpression && checkThatExpressionIsProperSymbolReference(accessExpression.argumentExpression, indexType, /*reportError*/ false) ?
+                    getPropertyNameForKnownSymbolName((<Identifier>(<PropertyAccessExpression>accessExpression.argumentExpression).name).text) :
+                    undefined;
+            if (propName !== undefined) {
+                const prop = getPropertyOfType(objectType, propName);
+                if (prop) {
+                    if (accessExpression) {
+                        if (isAssignmentTarget(accessExpression) && (isReferenceToReadonlyEntity(accessExpression, prop) || isReferenceThroughNamespaceImport(accessExpression))) {
+                            error(accessExpression.argumentExpression, Diagnostics.Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property, symbolToString(prop));
+                            return unknownType;
+                        }
+                        if (cacheSymbol) {
+                            getNodeLinks(accessNode).resolvedSymbol = prop;
+                        }
+                    }
+                    return getTypeOfSymbol(prop);
+                }
+            }
+            if (isTypeAnyOrAllConstituentTypesHaveKind(indexType, TypeFlags.StringLike | TypeFlags.NumberLike | TypeFlags.ESSymbol)) {
+                if (isTypeAny(objectType)) {
+                    return anyType;
+                }
+                const indexInfo = isTypeAnyOrAllConstituentTypesHaveKind(indexType, TypeFlags.NumberLike) && getIndexInfoOfType(objectType, IndexKind.Number) ||
+                    getIndexInfoOfType(objectType, IndexKind.String) ||
+                    undefined;
+                if (indexInfo) {
+                    if (accessExpression && indexInfo.isReadonly && (isAssignmentTarget(accessExpression) || isDeleteTarget(accessExpression))) {
+                        error(accessExpression, Diagnostics.Index_signature_in_type_0_only_permits_reading, typeToString(objectType));
+                        return unknownType;
+                    }
+                    return indexInfo.type;
+                }
+                if (accessExpression && !isConstEnumObjectType(objectType)) {
+                    if (noImplicitAny && !compilerOptions.suppressImplicitAnyIndexErrors) {
+                        if (getIndexTypeOfType(objectType, IndexKind.Number)) {
+                            error(accessExpression.argumentExpression, Diagnostics.Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number);
+                        }
+                        else {
+                            error(accessExpression, Diagnostics.Element_implicitly_has_an_any_type_because_type_0_has_no_index_signature, typeToString(objectType));
+                        }
+                    }
+                    return anyType;
+                }
+            }
+            if (accessNode) {
+                const indexNode = accessNode.kind === SyntaxKind.ElementAccessExpression ? (<ElementAccessExpression>accessNode).argumentExpression : (<IndexedAccessTypeNode>accessNode).indexType;
+                if (indexType.flags & (TypeFlags.StringLiteral | TypeFlags.NumberLiteral)) {
+                    error(indexNode, Diagnostics.Property_0_does_not_exist_on_type_1, "" + (<LiteralType>indexType).value, typeToString(objectType));
+                }
+                else if (indexType.flags & (TypeFlags.String | TypeFlags.Number)) {
+                    error(indexNode, Diagnostics.Type_0_has_no_matching_index_signature_for_type_1, typeToString(objectType), typeToString(indexType));
+                }
+                else {
+                    error(indexNode, Diagnostics.Type_0_cannot_be_used_as_an_index_type, typeToString(indexType));
+                }
+                return unknownType;
+            }
+            return anyType;
+        }
+
+        function getIndexedAccessForMappedType(type: MappedType, indexType: Type, accessNode?: ElementAccessExpression | IndexedAccessTypeNode) {
+            const accessExpression = accessNode && accessNode.kind === SyntaxKind.ElementAccessExpression ? <ElementAccessExpression>accessNode : undefined;
+            if (accessExpression && isAssignmentTarget(accessExpression) && type.declaration.readonlyToken) {
+                error(accessExpression, Diagnostics.Index_signature_in_type_0_only_permits_reading, typeToString(type));
+                return unknownType;
+            }
+            const mapper = createTypeMapper([getTypeParameterFromMappedType(type)], [indexType]);
+            const templateMapper = type.mapper ? combineTypeMappers(type.mapper, mapper) : mapper;
+            return instantiateType(getTemplateTypeFromMappedType(type), templateMapper);
+        }
+
+        function getIndexedAccessType(objectType: Type, indexType: Type, accessNode?: ElementAccessExpression | IndexedAccessTypeNode) {
+            // If the index type is generic, if the object type is generic and doesn't originate in an expression,
+            // or if the object type is a mapped type with a generic constraint, we are performing a higher-order
+            // index access where we cannot meaningfully access the properties of the object type. Note that for a
+            // generic T and a non-generic K, we eagerly resolve T[K] if it originates in an expression. This is to
+            // preserve backwards compatibility. For example, an element access 'this["foo"]' has always been resolved
+            // eagerly using the constraint type of 'this' at the given location.
+            if (maybeTypeOfKind(indexType, TypeFlags.TypeVariable | TypeFlags.Index) ||
+                maybeTypeOfKind(objectType, TypeFlags.TypeVariable) && !(accessNode && accessNode.kind === SyntaxKind.ElementAccessExpression) ||
+                isGenericMappedType(objectType)) {
+                if (objectType.flags & TypeFlags.Any) {
+                    return objectType;
+                }
+                // If the object type is a mapped type { [P in K]: E }, we instantiate E using a mapper that substitutes
+                // the index type for P. For example, for an index access { [P in K]: Box<T[P]> }[X], we construct the
+                // type Box<T[X]>.
+                if (isGenericMappedType(objectType)) {
+                    return getIndexedAccessForMappedType(<MappedType>objectType, indexType, accessNode);
+                }
+                // Otherwise we defer the operation by creating an indexed access type.
+                const id = objectType.id + "," + indexType.id;
+                let type = indexedAccessTypes.get(id);
+                if (!type) {
+                    indexedAccessTypes.set(id, type = createIndexedAccessType(objectType, indexType));
+                }
+                return type;
+            }
+            // In the following we resolve T[K] to the type of the property in T selected by K.
+            const apparentObjectType = getApparentType(objectType);
+            if (indexType.flags & TypeFlags.Union && !(indexType.flags & TypeFlags.Primitive)) {
+                const propTypes: Type[] = [];
+                for (const t of (<UnionType>indexType).types) {
+                    const propType = getPropertyTypeForIndexType(apparentObjectType, t, accessNode, /*cacheSymbol*/ false);
+                    if (propType === unknownType) {
+                        return unknownType;
+                    }
+                    propTypes.push(propType);
+                }
+                return getUnionType(propTypes);
+            }
+            return getPropertyTypeForIndexType(apparentObjectType, indexType, accessNode, /*cacheSymbol*/ true);
+        }
+
+        function getTypeFromIndexedAccessTypeNode(node: IndexedAccessTypeNode) {
             const links = getNodeLinks(node);
             if (!links.resolvedType) {
-                // Deferred resolution of members is handled by resolveObjectTypeMembers
-                const type = createObjectType(TypeFlags.Anonymous, node.symbol);
-                type.aliasSymbol = aliasSymbol;
-                type.aliasTypeArguments = aliasTypeArguments;
+                links.resolvedType = getIndexedAccessType(getTypeFromTypeNode(node.objectType), getTypeFromTypeNode(node.indexType), node);
+            }
+            return links.resolvedType;
+        }
+
+        function getTypeFromMappedTypeNode(node: MappedTypeNode): Type {
+            const links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                const type = <MappedType>createObjectType(ObjectFlags.Mapped, node.symbol);
+                type.declaration = node;
+                type.aliasSymbol = getAliasSymbolForTypeNode(node);
+                type.aliasTypeArguments = getAliasTypeArgumentsForTypeNode(node);
                 links.resolvedType = type;
+                // Eagerly resolve the constraint type which forces an error if the constraint type circularly
+                // references itself through one or more type aliases.
+                getConstraintTypeFromMappedType(type);
+            }
+            return links.resolvedType;
+        }
+
+        function getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node: TypeNode): Type {
+            const links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                // Deferred resolution of members is handled by resolveObjectTypeMembers
+                const aliasSymbol = getAliasSymbolForTypeNode(node);
+                if (node.symbol.members.size === 0 && !aliasSymbol) {
+                    links.resolvedType = emptyTypeLiteralType;
+                }
+                else {
+                    const type = createObjectType(ObjectFlags.Anonymous, node.symbol);
+                    type.aliasSymbol = aliasSymbol;
+                    type.aliasTypeArguments = getAliasTypeArgumentsForTypeNode(node);
+                    links.resolvedType = type;
+                }
             }
             return links.resolvedType;
         }
 
-        function createLiteralType(flags: TypeFlags, text: string) {
+        function getAliasSymbolForTypeNode(node: TypeNode) {
+            return node.parent.kind === SyntaxKind.TypeAliasDeclaration ? getSymbolOfNode(node.parent) : undefined;
+        }
+
+        function getAliasTypeArgumentsForTypeNode(node: TypeNode) {
+            const symbol = getAliasSymbolForTypeNode(node);
+            return symbol ? getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol) : undefined;
+        }
+
+        /**
+         * Since the source of spread types are object literals, which are not binary,
+         * this function should be called in a left folding style, with left = previous result of getSpreadType
+         * and right = the new element to be spread.
+         */
+        function getSpreadType(left: Type, right: Type): Type {
+            if (left.flags & TypeFlags.Any || right.flags & TypeFlags.Any) {
+                return anyType;
+            }
+            if (left.flags & TypeFlags.Never) {
+                return right;
+            }
+            if (right.flags & TypeFlags.Never) {
+                return left;
+            }
+            if (left.flags & TypeFlags.Union) {
+                return mapType(left, t => getSpreadType(t, right));
+            }
+            if (right.flags & TypeFlags.Union) {
+                return mapType(right, t => getSpreadType(left, t));
+            }
+            if (right.flags & TypeFlags.NonPrimitive) {
+                return emptyObjectType;
+            }
+
+            const members = createMap<Symbol>();
+            const skippedPrivateMembers = createMap<boolean>();
+            let stringIndexInfo: IndexInfo;
+            let numberIndexInfo: IndexInfo;
+            if (left === emptyObjectType) {
+                // for the first spread element, left === emptyObjectType, so take the right's string indexer
+                stringIndexInfo = getIndexInfoOfType(right, IndexKind.String);
+                numberIndexInfo = getIndexInfoOfType(right, IndexKind.Number);
+            }
+            else {
+                stringIndexInfo = unionSpreadIndexInfos(getIndexInfoOfType(left, IndexKind.String), getIndexInfoOfType(right, IndexKind.String));
+                numberIndexInfo = unionSpreadIndexInfos(getIndexInfoOfType(left, IndexKind.Number), getIndexInfoOfType(right, IndexKind.Number));
+            }
+
+            for (const rightProp of getPropertiesOfType(right)) {
+                // we approximate own properties as non-methods plus methods that are inside the object literal
+                const isSetterWithoutGetter = rightProp.flags & SymbolFlags.SetAccessor && !(rightProp.flags & SymbolFlags.GetAccessor);
+                if (getDeclarationModifierFlagsFromSymbol(rightProp) & (ModifierFlags.Private | ModifierFlags.Protected)) {
+                    skippedPrivateMembers.set(rightProp.name, true);
+                }
+                else if (!isClassMethod(rightProp) && !isSetterWithoutGetter) {
+                    members.set(rightProp.name, getNonReadonlySymbol(rightProp));
+                }
+            }
+            for (const leftProp of getPropertiesOfType(left)) {
+                if (leftProp.flags & SymbolFlags.SetAccessor && !(leftProp.flags & SymbolFlags.GetAccessor)
+                    || skippedPrivateMembers.has(leftProp.name)
+                    || isClassMethod(leftProp)) {
+                    continue;
+                }
+                if (members.has(leftProp.name)) {
+                    const rightProp = members.get(leftProp.name);
+                    const rightType = getTypeOfSymbol(rightProp);
+                    if (rightProp.flags & SymbolFlags.Optional) {
+                        const declarations: Declaration[] = concatenate(leftProp.declarations, rightProp.declarations);
+                        const flags = SymbolFlags.Property | (leftProp.flags & SymbolFlags.Optional);
+                        const result = createSymbol(flags, leftProp.name);
+                        result.type = getUnionType([getTypeOfSymbol(leftProp), getTypeWithFacts(rightType, TypeFacts.NEUndefined)]);
+                        result.leftSpread = leftProp;
+                        result.rightSpread = rightProp;
+                        result.declarations = declarations;
+                        members.set(leftProp.name, result);
+                    }
+                }
+                else {
+                    members.set(leftProp.name, getNonReadonlySymbol(leftProp));
+                }
+            }
+            return createAnonymousType(undefined, members, emptyArray, emptyArray, stringIndexInfo, numberIndexInfo);
+        }
+
+        function getNonReadonlySymbol(prop: Symbol) {
+            if (!isReadonlySymbol(prop)) {
+                return prop;
+            }
+            const flags = SymbolFlags.Property | (prop.flags & SymbolFlags.Optional);
+            const result = createSymbol(flags, prop.name);
+            result.type = getTypeOfSymbol(prop);
+            result.declarations = prop.declarations;
+            result.syntheticOrigin = prop;
+            return result;
+        }
+
+        function isClassMethod(prop: Symbol) {
+            return prop.flags & SymbolFlags.Method && find(prop.declarations, decl => isClassLike(decl.parent));
+        }
+
+        function createLiteralType(flags: TypeFlags, value: string | number, symbol: Symbol) {
             const type = <LiteralType>createType(flags);
-            type.text = text;
+            type.symbol = symbol;
+            type.value = value;
             return type;
         }
 
         function getFreshTypeOfLiteralType(type: Type) {
             if (type.flags & TypeFlags.StringOrNumberLiteral && !(type.flags & TypeFlags.FreshLiteral)) {
                 if (!(<LiteralType>type).freshType) {
-                    const freshType = <LiteralType>createLiteralType(type.flags | TypeFlags.FreshLiteral, (<LiteralType>type).text);
+                    const freshType = <LiteralType>createLiteralType(type.flags | TypeFlags.FreshLiteral, (<LiteralType>type).value, (<LiteralType>type).symbol);
                     freshType.regularType = <LiteralType>type;
                     (<LiteralType>type).freshType = freshType;
                 }
@@ -5621,9 +7775,19 @@ namespace ts {
             return type.flags & TypeFlags.StringOrNumberLiteral && type.flags & TypeFlags.FreshLiteral ? (<LiteralType>type).regularType : type;
         }
 
-        function getLiteralTypeForText(flags: TypeFlags, text: string) {
-            const map = flags & TypeFlags.StringLiteral ? stringLiteralTypes : numericLiteralTypes;
-            return map[text] || (map[text] = createLiteralType(flags, text));
+        function getLiteralType(value: string | number, enumId?: number, symbol?: Symbol) {
+            // We store all literal types in a single map with keys of the form '#NNN' and '@SSS',
+            // where NNN is the text representation of a numeric literal and SSS are the characters
+            // of a string literal. For literal enum members we use 'EEE#NNN' and 'EEE@SSS', where
+            // EEE is a unique id for the containing enum type.
+            const qualifier = typeof value === "number" ? "#" : "@";
+            const key = enumId ? enumId + qualifier + value : qualifier + value;
+            let type = literalTypes.get(key);
+            if (!type) {
+                const flags = (typeof value === "number" ? TypeFlags.NumberLiteral : TypeFlags.StringLiteral) | (enumId ? TypeFlags.EnumLiteral : 0);
+                literalTypes.set(key, type = createLiteralType(flags, value, symbol));
+            }
+            return type;
         }
 
         function getTypeFromLiteralTypeNode(node: LiteralTypeNode): Type {
@@ -5646,7 +7810,7 @@ namespace ts {
         function getTypeFromJSDocTupleType(node: JSDocTupleType): Type {
             const links = getNodeLinks(node);
             if (!links.resolvedType) {
-                const types = map(node.types, getTypeFromTypeNodeNoAlias);
+                const types = map(node.types, getTypeFromTypeNode);
                 links.resolvedType = createTupleType(types);
             }
             return links.resolvedType;
@@ -5673,11 +7837,7 @@ namespace ts {
             return links.resolvedType;
         }
 
-        function getTypeFromTypeNodeNoAlias(type: TypeNode) {
-            return getTypeFromTypeNode(type, /*aliasSymbol*/ undefined, /*aliasTypeArguments*/ undefined);
-        }
-
-        function getTypeFromTypeNode(node: TypeNode, aliasSymbol?: Symbol, aliasTypeArguments?: Type[]): Type {
+        function getTypeFromTypeNode(node: TypeNode): Type {
             switch (node.kind) {
                 case SyntaxKind.AnyKeyword:
                 case SyntaxKind.JSDocAllType:
@@ -5699,12 +7859,8 @@ namespace ts {
                     return nullType;
                 case SyntaxKind.NeverKeyword:
                     return neverType;
-                case SyntaxKind.JSDocNullKeyword:
-                    return nullType;
-                case SyntaxKind.JSDocUndefinedKeyword:
-                    return undefinedType;
-                case SyntaxKind.JSDocNeverKeyword:
-                    return neverType;
+                case SyntaxKind.ObjectKeyword:
+                    return nonPrimitiveType;
                 case SyntaxKind.ThisType:
                 case SyntaxKind.ThisKeyword:
                     return getTypeFromThisTypeNode(node);
@@ -5728,11 +7884,12 @@ namespace ts {
                     return getTypeFromTupleTypeNode(<TupleTypeNode>node);
                 case SyntaxKind.UnionType:
                 case SyntaxKind.JSDocUnionType:
-                    return getTypeFromUnionTypeNode(<UnionTypeNode>node, aliasSymbol, aliasTypeArguments);
+                    return getTypeFromUnionTypeNode(<UnionTypeNode>node);
                 case SyntaxKind.IntersectionType:
-                    return getTypeFromIntersectionTypeNode(<IntersectionTypeNode>node, aliasSymbol, aliasTypeArguments);
-                case SyntaxKind.ParenthesizedType:
+                    return getTypeFromIntersectionTypeNode(<IntersectionTypeNode>node);
                 case SyntaxKind.JSDocNullableType:
+                    return getTypeFromJSDocNullableTypeNode(<JSDocNullableType>node);
+                case SyntaxKind.ParenthesizedType:
                 case SyntaxKind.JSDocNonNullableType:
                 case SyntaxKind.JSDocConstructorType:
                 case SyntaxKind.JSDocThisType:
@@ -5745,7 +7902,13 @@ namespace ts {
                 case SyntaxKind.TypeLiteral:
                 case SyntaxKind.JSDocTypeLiteral:
                 case SyntaxKind.JSDocFunctionType:
-                    return getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node, aliasSymbol, aliasTypeArguments);
+                    return getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node);
+                case SyntaxKind.TypeOperator:
+                    return getTypeFromTypeOperatorNode(<TypeOperatorNode>node);
+                case SyntaxKind.IndexedAccessType:
+                    return getTypeFromIndexedAccessTypeNode(<IndexedAccessTypeNode>node);
+                case SyntaxKind.MappedType:
+                    return getTypeFromMappedTypeNode(<MappedTypeNode>node);
                 // This function assumes that an identifier or qualified name is a type expression
                 // Callers should first ensure this by calling isTypeNode
                 case SyntaxKind.Identifier:
@@ -5772,16 +7935,29 @@ namespace ts {
             return items;
         }
 
-        function createUnaryTypeMapper(source: Type, target: Type): TypeMapper {
-            return t => t === source ? target : t;
+        function instantiateTypes(types: Type[], mapper: TypeMapper) {
+            return instantiateList(types, mapper, instantiateType);
+        }
+
+        function instantiateSignatures(signatures: Signature[], mapper: TypeMapper) {
+            return instantiateList(signatures, mapper, instantiateSignature);
+        }
+
+        function instantiateCached<T extends Type>(type: T, mapper: TypeMapper, instantiator: (item: T, mapper: TypeMapper) => T): T {
+            const instantiations = mapper.instantiations || (mapper.instantiations = []);
+            return <T>instantiations[type.id] || (instantiations[type.id] = instantiator(type, mapper));
+        }
+
+        function makeUnaryTypeMapper(source: Type, target: Type) {
+            return (t: Type) => t === source ? target : t;
         }
 
-        function createBinaryTypeMapper(source1: Type, target1: Type, source2: Type, target2: Type): TypeMapper {
-            return t => t === source1 ? target1 : t === source2 ? target2 : t;
+        function makeBinaryTypeMapper(source1: Type, target1: Type, source2: Type, target2: Type) {
+            return (t: Type) => t === source1 ? target1 : t === source2 ? target2 : t;
         }
 
-        function createArrayTypeMapper(sources: Type[], targets: Type[]): TypeMapper {
-            return t => {
+        function makeArrayTypeMapper(sources: Type[], targets: Type[]) {
+            return (t: Type) => {
                 for (let i = 0; i < sources.length; i++) {
                     if (t === sources[i]) {
                         return targets ? targets[i] : anyType;
@@ -5792,37 +7968,35 @@ namespace ts {
         }
 
         function createTypeMapper(sources: Type[], targets: Type[]): TypeMapper {
-            const count = sources.length;
-            const mapper: TypeMapper =
-                count == 1 ? createUnaryTypeMapper(sources[0], targets ? targets[0] : anyType) :
-                    count == 2 ? createBinaryTypeMapper(sources[0], targets ? targets[0] : anyType, sources[1], targets ? targets[1] : anyType) :
-                        createArrayTypeMapper(sources, targets);
+            const mapper: TypeMapper = sources.length === 1 ? makeUnaryTypeMapper(sources[0], targets ? targets[0] : anyType) :
+                sources.length === 2 ? makeBinaryTypeMapper(sources[0], targets ? targets[0] : anyType, sources[1], targets ? targets[1] : anyType) :
+                    makeArrayTypeMapper(sources, targets);
             mapper.mappedTypes = sources;
-            mapper.targetTypes = targets;
             return mapper;
         }
 
         function createTypeEraser(sources: Type[]): TypeMapper {
-            return createTypeMapper(sources, undefined);
+            return createTypeMapper(sources, /*targets*/ undefined);
         }
 
-        function getInferenceMapper(context: InferenceContext): TypeMapper {
-            if (!context.mapper) {
-                const mapper: TypeMapper = t => {
-                    const typeParameters = context.signature.typeParameters;
-                    for (let i = 0; i < typeParameters.length; i++) {
-                        if (t === typeParameters[i]) {
-                            context.inferences[i].isFixed = true;
-                            return getInferredType(context, i);
-                        }
-                    }
-                    return t;
-                };
-                mapper.mappedTypes = context.signature.typeParameters;
-                mapper.context = context;
-                context.mapper = mapper;
-            }
-            return context.mapper;
+        /**
+         * Maps forward-references to later types parameters to the empty object type.
+         * This is used during inference when instantiating type parameter defaults.
+         */
+        function createBackreferenceMapper(typeParameters: TypeParameter[], index: number) {
+            const mapper: TypeMapper = t => indexOf(typeParameters, t) >= index ? emptyObjectType : t;
+            mapper.mappedTypes = typeParameters;
+            return mapper;
+        }
+
+        function isInferenceContext(mapper: TypeMapper): mapper is InferenceContext {
+            return !!(<InferenceContext>mapper).signature;
+        }
+
+        function cloneTypeMapper(mapper: TypeMapper): TypeMapper {
+            return mapper && isInferenceContext(mapper) ?
+                createInferenceContext(mapper.signature, mapper.flags | InferenceFlags.NoDefault, mapper.inferences) :
+                mapper;
         }
 
         function identityMapper(type: Type): Type {
@@ -5831,7 +8005,13 @@ namespace ts {
 
         function combineTypeMappers(mapper1: TypeMapper, mapper2: TypeMapper): TypeMapper {
             const mapper: TypeMapper = t => instantiateType(mapper1(t), mapper2);
-            mapper.mappedTypes = mapper1.mappedTypes;
+            mapper.mappedTypes = concatenate(mapper1.mappedTypes, mapper2.mappedTypes);
+            return mapper;
+        }
+
+        function createReplacementMapper(source: Type, target: Type, baseMapper: TypeMapper) {
+            const mapper: TypeMapper = t => t === source ? target : baseMapper(t);
+            mapper.mappedTypes = baseMapper.mappedTypes;
             return mapper;
         }
 
@@ -5878,7 +8058,7 @@ namespace ts {
             const result = createSignature(signature.declaration, freshTypeParameters,
                 signature.thisParameter && instantiateSymbol(signature.thisParameter, mapper),
                 instantiateList(signature.parameters, mapper, instantiateSymbol),
-                instantiateType(signature.resolvedReturnType, mapper),
+                /*resolvedReturnType*/ undefined,
                 freshTypePredicate,
                 signature.minArgumentCount, signature.hasRestParameter, signature.hasLiteralTypes);
             result.target = signature;
@@ -5887,7 +8067,7 @@ namespace ts {
         }
 
         function instantiateSymbol(symbol: Symbol, mapper: TypeMapper): Symbol {
-            if (symbol.flags & SymbolFlags.Instantiated) {
+            if (getCheckFlags(symbol) & CheckFlags.Instantiated) {
                 const links = getSymbolLinks(symbol);
                 // If symbol being instantiated is itself a instantiation, fetch the original target and combine the
                 // type mappers. This ensures that original type identities are properly preserved and that aliases
@@ -5895,10 +8075,10 @@ namespace ts {
                 symbol = links.target;
                 mapper = combineTypeMappers(links.mapper, mapper);
             }
-
             // Keep the flags from the symbol we're instantiating.  Mark that is instantiated, and
             // also transient so that we can just store data on it directly.
-            const result = <TransientSymbol>createSymbol(SymbolFlags.Instantiated | SymbolFlags.Transient | symbol.flags, symbol.name);
+            const result = createSymbol(symbol.flags, symbol.name);
+            result.checkFlags = CheckFlags.Instantiated;
             result.declarations = symbol.declarations;
             result.parent = symbol.parent;
             result.target = symbol;
@@ -5906,37 +8086,67 @@ namespace ts {
             if (symbol.valueDeclaration) {
                 result.valueDeclaration = symbol.valueDeclaration;
             }
+            return result;
+        }
 
+        function instantiateAnonymousType(type: AnonymousType, mapper: TypeMapper): AnonymousType {
+            const result = <AnonymousType>createObjectType(ObjectFlags.Anonymous | ObjectFlags.Instantiated, type.symbol);
+            result.target = type.objectFlags & ObjectFlags.Instantiated ? type.target : type;
+            result.mapper = type.objectFlags & ObjectFlags.Instantiated ? combineTypeMappers(type.mapper, mapper) : mapper;
+            result.aliasSymbol = type.aliasSymbol;
+            result.aliasTypeArguments = instantiateTypes(type.aliasTypeArguments, mapper);
             return result;
         }
 
-        function instantiateAnonymousType(type: AnonymousType, mapper: TypeMapper): ObjectType {
-            if (mapper.instantiations) {
-                const cachedType = mapper.instantiations[type.id];
-                if (cachedType) {
-                    return cachedType;
+        function instantiateMappedType(type: MappedType, mapper: TypeMapper): Type {
+            // Check if we have a homomorphic mapped type, i.e. a type of the form { [P in keyof T]: X } for some
+            // type variable T. If so, the mapped type is distributive over a union type and when T is instantiated
+            // to a union type A | B, we produce { [P in keyof A]: X } | { [P in keyof B]: X }. Furthermore, for
+            // homomorphic mapped types we leave primitive types alone. For example, when T is instantiated to a
+            // union type A | undefined, we produce { [P in keyof A]: X } | undefined.
+            const constraintType = getConstraintTypeFromMappedType(type);
+            if (constraintType.flags & TypeFlags.Index) {
+                const typeVariable = (<IndexType>constraintType).type;
+                if (typeVariable.flags & TypeFlags.TypeParameter) {
+                    const mappedTypeVariable = instantiateType(typeVariable, mapper);
+                    if (typeVariable !== mappedTypeVariable) {
+                        return mapType(mappedTypeVariable, t => {
+                            if (isMappableType(t)) {
+                                return instantiateMappedObjectType(type, createReplacementMapper(typeVariable, t, mapper));
+                            }
+                            return t;
+                        });
+                    }
                 }
             }
-            else {
-                mapper.instantiations = [];
-            }
-            // Mark the anonymous type as instantiated such that our infinite instantiation detection logic can recognize it
-            const result = <AnonymousType>createObjectType(TypeFlags.Anonymous | TypeFlags.Instantiated, type.symbol);
-            result.target = type;
-            result.mapper = mapper;
+            return instantiateMappedObjectType(type, mapper);
+        }
+
+        function isMappableType(type: Type) {
+            return type.flags & (TypeFlags.TypeParameter | TypeFlags.Object | TypeFlags.Intersection | TypeFlags.IndexedAccess);
+        }
+
+        function instantiateMappedObjectType(type: MappedType, mapper: TypeMapper): Type {
+            const result = <MappedType>createObjectType(ObjectFlags.Mapped | ObjectFlags.Instantiated, type.symbol);
+            result.declaration = type.declaration;
+            result.mapper = type.mapper ? combineTypeMappers(type.mapper, mapper) : mapper;
             result.aliasSymbol = type.aliasSymbol;
-            result.aliasTypeArguments = mapper.targetTypes;
-            mapper.instantiations[type.id] = result;
+            result.aliasTypeArguments = instantiateTypes(type.aliasTypeArguments, mapper);
             return result;
         }
 
         function isSymbolInScopeOfMappedTypeParameter(symbol: Symbol, mapper: TypeMapper) {
+            if (!(symbol.declarations && symbol.declarations.length)) {
+                return false;
+            }
             const mappedTypes = mapper.mappedTypes;
             // Starting with the parent of the symbol's declaration, check if the mapper maps any of
             // the type parameters introduced by enclosing declarations. We just pick the first
             // declaration since multiple declarations will all have the same parent anyway.
-            let node = symbol.declarations[0].parent;
-            while (node) {
+            return !!findAncestor(symbol.declarations[0], node => {
+                if (node.kind === SyntaxKind.ModuleDeclaration || node.kind === SyntaxKind.SourceFile) {
+                    return "quit";
+                }
                 switch (node.kind) {
                     case SyntaxKind.FunctionType:
                     case SyntaxKind.ConstructorType:
@@ -5955,9 +8165,9 @@ namespace ts {
                     case SyntaxKind.ClassExpression:
                     case SyntaxKind.InterfaceDeclaration:
                     case SyntaxKind.TypeAliasDeclaration:
-                        const declaration = <DeclarationWithTypeParameters>node;
-                        if (declaration.typeParameters) {
-                            for (const d of declaration.typeParameters) {
+                        const typeParameters = getEffectiveTypeParameterDeclarations(node as DeclarationWithTypeParameters);
+                        if (typeParameters) {
+                            for (const d of typeParameters) {
                                 if (contains(mappedTypes, getDeclaredTypeOfTypeParameter(getSymbolOfNode(d)))) {
                                     return true;
                                 }
@@ -5970,21 +8180,67 @@ namespace ts {
                             }
                         }
                         break;
-                    case SyntaxKind.ModuleDeclaration:
-                    case SyntaxKind.SourceFile:
-                        return false;
+                    case SyntaxKind.MappedType:
+                        if (contains(mappedTypes, getDeclaredTypeOfTypeParameter(getSymbolOfNode((<MappedTypeNode>node).typeParameter)))) {
+                            return true;
+                        }
+                        break;
+                    case SyntaxKind.JSDocFunctionType:
+                        const func = node as JSDocFunctionType;
+                        for (const p of func.parameters) {
+                            if (contains(mappedTypes, getTypeOfNode(p))) {
+                                return true;
+                            }
+                        }
+                        break;
+                }
+            });
+        }
+
+        function isTopLevelTypeAlias(symbol: Symbol) {
+            if (symbol.declarations && symbol.declarations.length) {
+                const parentKind = symbol.declarations[0].parent.kind;
+                return parentKind === SyntaxKind.SourceFile || parentKind === SyntaxKind.ModuleBlock;
+            }
+            return false;
+        }
+
+        function instantiateType(type: Type, mapper: TypeMapper): Type {
+            if (type && mapper !== identityMapper) {
+                // If we are instantiating a type that has a top-level type alias, obtain the instantiation through
+                // the type alias instead in order to share instantiations for the same type arguments. This can
+                // dramatically reduce the number of structurally identical types we generate. Note that we can only
+                // perform this optimization for top-level type aliases. Consider:
+                //
+                //   function f1<T>(x: T) {
+                //     type Foo<X> = { x: X, t: T };
+                //     let obj: Foo<T> = { x: x };
+                //     return obj;
+                //   }
+                //   function f2<U>(x: U) { return f1(x); }
+                //   let z = f2(42);
+                //
+                // Above, the declaration of f2 has an inferred return type that is an instantiation of f1's Foo<X>
+                // equivalent to { x: U, t: U }. When instantiating this return type, we can't go back to Foo<X>'s
+                // cache because all cached instantiations are of the form { x: ???, t: T }, i.e. they have not been
+                // instantiated for T. Instead, we need to further instantiate the { x: U, t: U } form.
+                if (type.aliasSymbol && isTopLevelTypeAlias(type.aliasSymbol)) {
+                    if (type.aliasTypeArguments) {
+                        return getTypeAliasInstantiation(type.aliasSymbol, instantiateTypes(type.aliasTypeArguments, mapper));
+                    }
+                    return type;
                 }
-                node = node.parent;
+                return instantiateTypeNoAlias(type, mapper);
             }
-            return false;
+            return type;
         }
 
-        function instantiateType(type: Type, mapper: TypeMapper): Type {
-            if (type && mapper !== identityMapper) {
-                if (type.flags & TypeFlags.TypeParameter) {
-                    return mapper(<TypeParameter>type);
-                }
-                if (type.flags & TypeFlags.Anonymous) {
+        function instantiateTypeNoAlias(type: Type, mapper: TypeMapper): Type {
+            if (type.flags & TypeFlags.TypeParameter) {
+                return mapper(<TypeParameter>type);
+            }
+            if (type.flags & TypeFlags.Object) {
+                if ((<ObjectType>type).objectFlags & ObjectFlags.Anonymous) {
                     // If the anonymous type originates in a declaration of a function, method, class, or
                     // interface, in an object type literal, or in an object literal expression, we may need
                     // to instantiate the type because it might reference a type parameter. We skip instantiation
@@ -5993,19 +8249,28 @@ namespace ts {
                     // instantiation.
                     return type.symbol &&
                         type.symbol.flags & (SymbolFlags.Function | SymbolFlags.Method | SymbolFlags.Class | SymbolFlags.TypeLiteral | SymbolFlags.ObjectLiteral) &&
-                        (type.flags & TypeFlags.Instantiated || isSymbolInScopeOfMappedTypeParameter(type.symbol, mapper)) ?
-                        instantiateAnonymousType(<AnonymousType>type, mapper) : type;
-                }
-                if (type.flags & TypeFlags.Reference) {
-                    return createTypeReference((<TypeReference>type).target, instantiateList((<TypeReference>type).typeArguments, mapper, instantiateType));
+                        ((<ObjectType>type).objectFlags & ObjectFlags.Instantiated || isSymbolInScopeOfMappedTypeParameter(type.symbol, mapper)) ?
+                        instantiateCached(type, mapper, instantiateAnonymousType) : type;
                 }
-                if (type.flags & TypeFlags.Union && !(type.flags & TypeFlags.Primitive)) {
-                    return getUnionType(instantiateList((<UnionType>type).types, mapper, instantiateType), /*subtypeReduction*/ false, type.aliasSymbol, mapper.targetTypes);
+                if ((<ObjectType>type).objectFlags & ObjectFlags.Mapped) {
+                    return instantiateCached(type, mapper, instantiateMappedType);
                 }
-                if (type.flags & TypeFlags.Intersection) {
-                    return getIntersectionType(instantiateList((<IntersectionType>type).types, mapper, instantiateType), type.aliasSymbol, mapper.targetTypes);
+                if ((<ObjectType>type).objectFlags & ObjectFlags.Reference) {
+                    return createTypeReference((<TypeReference>type).target, instantiateTypes((<TypeReference>type).typeArguments, mapper));
                 }
             }
+            if (type.flags & TypeFlags.Union && !(type.flags & TypeFlags.Primitive)) {
+                return getUnionType(instantiateTypes((<UnionType>type).types, mapper), /*subtypeReduction*/ false, type.aliasSymbol, instantiateTypes(type.aliasTypeArguments, mapper));
+            }
+            if (type.flags & TypeFlags.Intersection) {
+                return getIntersectionType(instantiateTypes((<IntersectionType>type).types, mapper), type.aliasSymbol, instantiateTypes(type.aliasTypeArguments, mapper));
+            }
+            if (type.flags & TypeFlags.Index) {
+                return getIndexType(instantiateType((<IndexType>type).type, mapper));
+            }
+            if (type.flags & TypeFlags.IndexedAccess) {
+                return getIndexedAccessType(instantiateType((<IndexedAccessType>type).objectType, mapper), instantiateType((<IndexedAccessType>type).indexType, mapper));
+            }
             return type;
         }
 
@@ -6015,7 +8280,7 @@ namespace ts {
 
         // Returns true if the given expression contains (at any level of nesting) a function or arrow expression
         // that is subject to contextual typing.
-        function isContextSensitive(node: Expression | MethodDeclaration | ObjectLiteralElementLike): boolean {
+        function isContextSensitive(node: Expression | MethodDeclaration | ObjectLiteralElementLike | JsxAttributeLike): boolean {
             Debug.assert(node.kind !== SyntaxKind.MethodDeclaration || isObjectLiteralMethod(node));
             switch (node.kind) {
                 case SyntaxKind.FunctionExpression:
@@ -6038,33 +8303,59 @@ namespace ts {
                     return isContextSensitiveFunctionLikeDeclaration(<MethodDeclaration>node);
                 case SyntaxKind.ParenthesizedExpression:
                     return isContextSensitive((<ParenthesizedExpression>node).expression);
+                case SyntaxKind.JsxAttributes:
+                    return forEach((<JsxAttributes>node).properties, isContextSensitive);
+                case SyntaxKind.JsxAttribute:
+                    // If there is no initializer, JSX attribute has a boolean value of true which is not context sensitive.
+                    return (<JsxAttribute>node).initializer && isContextSensitive((<JsxAttribute>node).initializer);
+                case SyntaxKind.JsxExpression:
+                    // It is possible to that node.expression is undefined (e.g <div x={} />)
+                    return (<JsxExpression>node).expression && isContextSensitive((<JsxExpression>node).expression);
             }
 
             return false;
         }
 
         function isContextSensitiveFunctionLikeDeclaration(node: FunctionLikeDeclaration) {
-            const areAllParametersUntyped = !forEach(node.parameters, p => p.type);
-            const isNullaryArrow = node.kind === SyntaxKind.ArrowFunction && !node.parameters.length;
-            return !node.typeParameters && areAllParametersUntyped && !isNullaryArrow;
+            // Functions with type parameters are not context sensitive.
+            if (node.typeParameters) {
+                return false;
+            }
+            // Functions with any parameters that lack type annotations are context sensitive.
+            if (forEach(node.parameters, p => !getEffectiveTypeAnnotationNode(p))) {
+                return true;
+            }
+            // For arrow functions we now know we're not context sensitive.
+            if (node.kind === SyntaxKind.ArrowFunction) {
+                return false;
+            }
+            // If the first parameter is not an explicit 'this' parameter, then the function has
+            // an implicit 'this' parameter which is subject to contextual typing. Otherwise we
+            // know that all parameters (including 'this') have type annotations and nothing is
+            // subject to contextual typing.
+            const parameter = firstOrUndefined(node.parameters);
+            return !(parameter && parameterIsThisKeyword(parameter));
         }
 
-        function isContextSensitiveFunctionOrObjectLiteralMethod(func: Node): func is FunctionExpression | MethodDeclaration {
+        function isContextSensitiveFunctionOrObjectLiteralMethod(func: Node): func is FunctionExpression | ArrowFunction | MethodDeclaration {
             return (isFunctionExpressionOrArrowFunction(func) || isObjectLiteralMethod(func)) && isContextSensitiveFunctionLikeDeclaration(func);
         }
 
         function getTypeWithoutSignatures(type: Type): Type {
-            if (type.flags & TypeFlags.ObjectType) {
+            if (type.flags & TypeFlags.Object) {
                 const resolved = resolveStructuredTypeMembers(<ObjectType>type);
                 if (resolved.constructSignatures.length) {
-                    const result = <ResolvedType>createObjectType(TypeFlags.Anonymous, type.symbol);
+                    const result = <ResolvedType>createObjectType(ObjectFlags.Anonymous, type.symbol);
                     result.members = resolved.members;
                     result.properties = resolved.properties;
                     result.callSignatures = emptyArray;
                     result.constructSignatures = emptyArray;
-                    type = result;
+                    return result;
                 }
             }
+            else if (type.flags & TypeFlags.Intersection) {
+                return getIntersectionType(map((<IntersectionType>type).types, getTypeWithoutSignatures));
+            }
             return type;
         }
 
@@ -6094,12 +8385,18 @@ namespace ts {
         // subtype of T but not structurally identical to T. This specifically means that two distinct but
         // structurally identical types (such as two classes) are not considered instances of each other.
         function isTypeInstanceOf(source: Type, target: Type): boolean {
-            return source === target || isTypeSubtypeOf(source, target) && !isTypeIdenticalTo(source, target);
+            return getTargetType(source) === getTargetType(target) || isTypeSubtypeOf(source, target) && !isTypeIdenticalTo(source, target);
         }
 
         /**
          * This is *not* a bi-directional relationship.
          * If one needs to check both directions for comparability, use a second call to this function or 'checkTypeComparableTo'.
+         *
+         * A type S is comparable to a type T if some (but not necessarily all) of the possible values of S are also possible values of T.
+         * It is used to check following cases:
+         *   - the types of the left and right sides of equality/inequality operators (`===`, `!==`, `==`, `!=`).
+         *   - the types of `case` clause expressions and their respective `switch` expressions.
+         *   - the type of an expression in a type assertion with the type being asserted.
          */
         function isTypeComparableTo(source: Type, target: Type): boolean {
             return isTypeRelatedTo(source, target, comparableRelation);
@@ -6109,10 +8406,6 @@ namespace ts {
             return isTypeComparableTo(type1, type2) || isTypeComparableTo(type2, type1);
         }
 
-        function checkTypeSubtypeOf(source: Type, target: Type, errorNode: Node, headMessage?: DiagnosticMessage, containingMessageChain?: DiagnosticMessageChain): boolean {
-            return checkTypeRelatedTo(source, target, subtypeRelation, errorNode, headMessage, containingMessageChain);
-        }
-
         function checkTypeAssignableTo(source: Type, target: Type, errorNode: Node, headMessage?: DiagnosticMessage, containingMessageChain?: DiagnosticMessageChain): boolean {
             return checkTypeRelatedTo(source, target, assignableRelation, errorNode, headMessage, containingMessageChain);
         }
@@ -6128,7 +8421,8 @@ namespace ts {
         function isSignatureAssignableTo(source: Signature,
             target: Signature,
             ignoreReturnTypes: boolean): boolean {
-            return compareSignaturesRelated(source, target, ignoreReturnTypes, /*reportErrors*/ false, /*errorReporter*/ undefined, compareTypesAssignable) !== Ternary.False;
+            return compareSignaturesRelated(source, target, /*checkAsCallback*/ false, ignoreReturnTypes, /*reportErrors*/ false,
+                /*errorReporter*/ undefined, compareTypesAssignable) !== Ternary.False;
         }
 
         type ErrorReporter = (message: DiagnosticMessage, arg0?: string, arg1?: string) => void;
@@ -6138,6 +8432,7 @@ namespace ts {
          */
         function compareSignaturesRelated(source: Signature,
             target: Signature,
+            checkAsCallback: boolean,
             ignoreReturnTypes: boolean,
             reportErrors: boolean,
             errorReporter: ErrorReporter,
@@ -6150,10 +8445,9 @@ namespace ts {
                 return Ternary.False;
             }
 
-            // Spec 1.0 Section 3.8.3 & 3.8.4:
-            // M and N (the signatures) are instantiated using type Any as the type argument for all type parameters declared by M and N
-            source = getErasedSignature(source);
-            target = getErasedSignature(target);
+            if (source.typeParameters) {
+                source = instantiateSignatureInContextOf(source, target);
+            }
 
             let result = Ternary.True;
 
@@ -6180,9 +8474,23 @@ namespace ts {
             const sourceParams = source.parameters;
             const targetParams = target.parameters;
             for (let i = 0; i < checkCount; i++) {
-                const s = i < sourceMax ? getTypeOfParameter(sourceParams[i]) : getRestTypeOfSignature(source);
-                const t = i < targetMax ? getTypeOfParameter(targetParams[i]) : getRestTypeOfSignature(target);
-                const related = compareTypes(s, t, /*reportErrors*/ false) || compareTypes(t, s, reportErrors);
+                const sourceType = i < sourceMax ? getTypeOfParameter(sourceParams[i]) : getRestTypeOfSignature(source);
+                const targetType = i < targetMax ? getTypeOfParameter(targetParams[i]) : getRestTypeOfSignature(target);
+                const sourceSig = getSingleCallSignature(getNonNullableType(sourceType));
+                const targetSig = getSingleCallSignature(getNonNullableType(targetType));
+                // In order to ensure that any generic type Foo<T> is at least co-variant with respect to T no matter
+                // how Foo uses T, we need to relate parameters bi-variantly (given that parameters are input positions,
+                // they naturally relate only contra-variantly). However, if the source and target parameters both have
+                // function types with a single call signature, we known we are relating two callback parameters. In
+                // that case it is sufficient to only relate the parameters of the signatures co-variantly because,
+                // similar to return values, callback parameters are output positions. This means that a Promise<T>,
+                // where T is used only in callback parameter positions, will be co-variant (as opposed to bi-variant)
+                // with respect to T.
+                const callbacks = sourceSig && targetSig && !sourceSig.typePredicate && !targetSig.typePredicate &&
+                    (getFalsyFlags(sourceType) & TypeFlags.Nullable) === (getFalsyFlags(targetType) & TypeFlags.Nullable);
+                const related = callbacks ?
+                    compareSignaturesRelated(targetSig, sourceSig, /*checkAsCallback*/ true, /*ignoreReturnTypes*/ false, reportErrors, errorReporter, compareTypes) :
+                    !checkAsCallback && compareTypes(sourceType, targetType, /*reportErrors*/ false) || compareTypes(targetType, sourceType, reportErrors);
                 if (!related) {
                     if (reportErrors) {
                         errorReporter(Diagnostics.Types_of_parameters_0_and_1_are_incompatible,
@@ -6214,7 +8522,11 @@ namespace ts {
                     }
                 }
                 else {
-                    result &= compareTypes(sourceReturnType, targetReturnType, reportErrors);
+                    // When relating callback signatures, we still need to relate return types bi-variantly as otherwise
+                    // the containing type wouldn't be co-variant. For example, interface Foo<T> { add(cb: () => T): void }
+                    // wouldn't be co-variant for T without this rule.
+                    result &= checkAsCallback && compareTypes(targetReturnType, sourceReturnType, /*reportErrors*/ false) ||
+                        compareTypes(sourceReturnType, targetReturnType, reportErrors);
                 }
 
             }
@@ -6297,59 +8609,84 @@ namespace ts {
             }
         }
 
-        function isEnumTypeRelatedTo(source: EnumType, target: EnumType, errorReporter?: ErrorReporter) {
-            if (source === target) {
+        function isEmptyResolvedType(t: ResolvedType) {
+            return t.properties.length === 0 &&
+                t.callSignatures.length === 0 &&
+                t.constructSignatures.length === 0 &&
+                !t.stringIndexInfo &&
+                !t.numberIndexInfo;
+        }
+
+        function isEmptyObjectType(type: Type): boolean {
+            return type.flags & TypeFlags.Object ? isEmptyResolvedType(resolveStructuredTypeMembers(<ObjectType>type)) :
+                type.flags & TypeFlags.NonPrimitive ? true :
+                type.flags & TypeFlags.Union ? forEach((<UnionType>type).types, isEmptyObjectType) :
+                type.flags & TypeFlags.Intersection ? !forEach((<UnionType>type).types, t => !isEmptyObjectType(t)) :
+                false;
+        }
+
+        function isEnumTypeRelatedTo(sourceSymbol: Symbol, targetSymbol: Symbol, errorReporter?: ErrorReporter) {
+            if (sourceSymbol === targetSymbol) {
                 return true;
             }
-            const id = source.id + "," + target.id;
-            if (enumRelation[id] !== undefined) {
-                return enumRelation[id];
+            const id = getSymbolId(sourceSymbol) + "," + getSymbolId(targetSymbol);
+            const relation = enumRelation.get(id);
+            if (relation !== undefined) {
+                return relation;
             }
-            if (source.symbol.name !== target.symbol.name ||
-                !(source.symbol.flags & SymbolFlags.RegularEnum) || !(target.symbol.flags & SymbolFlags.RegularEnum) ||
-                (source.flags & TypeFlags.Union) !== (target.flags & TypeFlags.Union)) {
-                return enumRelation[id] = false;
+            if (sourceSymbol.name !== targetSymbol.name || !(sourceSymbol.flags & SymbolFlags.RegularEnum) || !(targetSymbol.flags & SymbolFlags.RegularEnum)) {
+                enumRelation.set(id, false);
+                return false;
             }
-            const targetEnumType = getTypeOfSymbol(target.symbol);
-            for (const property of getPropertiesOfType(getTypeOfSymbol(source.symbol))) {
+            const targetEnumType = getTypeOfSymbol(targetSymbol);
+            for (const property of getPropertiesOfType(getTypeOfSymbol(sourceSymbol))) {
                 if (property.flags & SymbolFlags.EnumMember) {
                     const targetProperty = getPropertyOfType(targetEnumType, property.name);
                     if (!targetProperty || !(targetProperty.flags & SymbolFlags.EnumMember)) {
                         if (errorReporter) {
                             errorReporter(Diagnostics.Property_0_is_missing_in_type_1, property.name,
-                                typeToString(target, /*enclosingDeclaration*/ undefined, TypeFormatFlags.UseFullyQualifiedType));
+                                typeToString(getDeclaredTypeOfSymbol(targetSymbol), /*enclosingDeclaration*/ undefined, TypeFormatFlags.UseFullyQualifiedType));
                         }
-                        return enumRelation[id] = false;
+                        enumRelation.set(id, false);
+                        return false;
                     }
                 }
             }
-            return enumRelation[id] = true;
+            enumRelation.set(id, true);
+            return true;
         }
 
         function isSimpleTypeRelatedTo(source: Type, target: Type, relation: Map<RelationComparisonResult>, errorReporter?: ErrorReporter) {
-            if (target.flags & TypeFlags.Never) return false;
-            if (target.flags & TypeFlags.Any || source.flags & TypeFlags.Never) return true;
-            if (source.flags & TypeFlags.StringLike && target.flags & TypeFlags.String) return true;
-            if (source.flags & TypeFlags.NumberLike && target.flags & TypeFlags.Number) return true;
-            if (source.flags & TypeFlags.BooleanLike && target.flags & TypeFlags.Boolean) return true;
-            if (source.flags & TypeFlags.EnumLiteral && target.flags & TypeFlags.Enum && (<EnumLiteralType>source).baseType === target) return true;
-            if (source.flags & TypeFlags.Enum && target.flags & TypeFlags.Enum && isEnumTypeRelatedTo(<EnumType>source, <EnumType>target, errorReporter)) return true;
-            if (source.flags & TypeFlags.Undefined && (!strictNullChecks || target.flags & (TypeFlags.Undefined | TypeFlags.Void))) return true;
-            if (source.flags & TypeFlags.Null && (!strictNullChecks || target.flags & TypeFlags.Null)) return true;
+            const s = source.flags;
+            const t = target.flags;
+            if (t & TypeFlags.Never) return false;
+            if (t & TypeFlags.Any || s & TypeFlags.Never) return true;
+            if (s & TypeFlags.StringLike && t & TypeFlags.String) return true;
+            if (s & TypeFlags.StringLiteral && s & TypeFlags.EnumLiteral &&
+                t & TypeFlags.StringLiteral && !(t & TypeFlags.EnumLiteral) &&
+                (<LiteralType>source).value === (<LiteralType>target).value) return true;
+            if (s & TypeFlags.NumberLike && t & TypeFlags.Number) return true;
+            if (s & TypeFlags.NumberLiteral && s & TypeFlags.EnumLiteral &&
+                t & TypeFlags.NumberLiteral && !(t & TypeFlags.EnumLiteral) &&
+                (<LiteralType>source).value === (<LiteralType>target).value) return true;
+            if (s & TypeFlags.BooleanLike && t & TypeFlags.Boolean) return true;
+            if (s & TypeFlags.Enum && t & TypeFlags.Enum && isEnumTypeRelatedTo(source.symbol, target.symbol, errorReporter)) return true;
+            if (s & TypeFlags.EnumLiteral && t & TypeFlags.EnumLiteral) {
+                if (s & TypeFlags.Union && t & TypeFlags.Union && isEnumTypeRelatedTo(source.symbol, target.symbol, errorReporter)) return true;
+                if (s & TypeFlags.Literal && t & TypeFlags.Literal &&
+                    (<LiteralType>source).value === (<LiteralType>target).value &&
+                    isEnumTypeRelatedTo(getParentOfSymbol(source.symbol), getParentOfSymbol(target.symbol), errorReporter)) return true;
+            }
+            if (s & TypeFlags.Undefined && (!strictNullChecks || t & (TypeFlags.Undefined | TypeFlags.Void))) return true;
+            if (s & TypeFlags.Null && (!strictNullChecks || t & TypeFlags.Null)) return true;
+            if (s & TypeFlags.Object && t & TypeFlags.NonPrimitive) return true;
             if (relation === assignableRelation || relation === comparableRelation) {
-                if (source.flags & TypeFlags.Any) return true;
-                if ((source.flags & TypeFlags.Number | source.flags & TypeFlags.NumberLiteral) && target.flags & TypeFlags.EnumLike) return true;
-                if (source.flags & TypeFlags.EnumLiteral &&
-                    target.flags & TypeFlags.EnumLiteral &&
-                    (<EnumLiteralType>source).text === (<EnumLiteralType>target).text &&
-                    isEnumTypeRelatedTo((<EnumLiteralType>source).baseType, (<EnumLiteralType>target).baseType, errorReporter)) {
-                    return true;
-                }
-                if (source.flags & TypeFlags.EnumLiteral &&
-                    target.flags & TypeFlags.Enum &&
-                    isEnumTypeRelatedTo(<EnumType>target, (<EnumLiteralType>source).baseType, errorReporter)) {
-                    return true;
-                }
+                if (s & TypeFlags.Any) return true;
+                // Type number or any numeric literal type is assignable to any numeric enum type or any
+                // numeric enum literal type. This rule exists for backwards compatibility reasons because
+                // bit-flag enum types sometimes look like literal enum types with numeric literal values.
+                if (s & (TypeFlags.Number | TypeFlags.NumberLiteral) && !(s & TypeFlags.EnumLiteral) && (
+                    t & TypeFlags.Enum || t & TypeFlags.NumberLiteral && t & TypeFlags.EnumLiteral)) return true;
             }
             return false;
         }
@@ -6364,15 +8701,15 @@ namespace ts {
             if (source === target || relation !== identityRelation && isSimpleTypeRelatedTo(source, target, relation)) {
                 return true;
             }
-            if (source.flags & TypeFlags.ObjectType && target.flags & TypeFlags.ObjectType) {
+            if (source.flags & TypeFlags.Object && target.flags & TypeFlags.Object) {
                 const id = relation !== identityRelation || source.id < target.id ? source.id + "," + target.id : target.id + "," + source.id;
-                const related = relation[id];
+                const related = relation.get(id);
                 if (related !== undefined) {
                     return related === RelationComparisonResult.Succeeded;
                 }
             }
-            if (source.flags & TypeFlags.StructuredOrTypeParameter || target.flags & TypeFlags.StructuredOrTypeParameter) {
-                return checkTypeRelatedTo(source, target, relation, undefined, undefined, undefined);
+            if (source.flags & TypeFlags.StructuredOrTypeVariable || target.flags & TypeFlags.StructuredOrTypeVariable) {
+                return checkTypeRelatedTo(source, target, relation, /*errorNode*/ undefined);
             }
             return false;
         }
@@ -6396,12 +8733,13 @@ namespace ts {
             containingMessageChain?: DiagnosticMessageChain): boolean {
 
             let errorInfo: DiagnosticMessageChain;
-            let sourceStack: ObjectType[];
-            let targetStack: ObjectType[];
+            let sourceStack: Type[];
+            let targetStack: Type[];
             let maybeStack: Map<RelationComparisonResult>[];
             let expandingFlags: number;
             let depth = 0;
             let overflow = false;
+            let isIntersectionConstituent = false;
 
             Debug.assert(relation !== identityRelation || !errorNode, "no error reporting in identity checking");
 
@@ -6432,9 +8770,15 @@ namespace ts {
                 }
 
                 if (!message) {
-                    message = relation === comparableRelation ?
-                        Diagnostics.Type_0_is_not_comparable_to_type_1 :
-                        Diagnostics.Type_0_is_not_assignable_to_type_1;
+                    if (relation === comparableRelation) {
+                        message = Diagnostics.Type_0_is_not_comparable_to_type_1;
+                    }
+                    else if (sourceType === targetType) {
+                        message = Diagnostics.Type_0_is_not_assignable_to_type_1_Two_different_types_with_this_name_exist_but_they_are_unrelated;
+                    }
+                    else {
+                        message = Diagnostics.Type_0_is_not_assignable_to_type_1;
+                    }
                 }
 
                 reportError(message, sourceType, targetType);
@@ -6447,17 +8791,37 @@ namespace ts {
                 if ((globalStringType === source && stringType === target) ||
                     (globalNumberType === source && numberType === target) ||
                     (globalBooleanType === source && booleanType === target) ||
-                    (getGlobalESSymbolType() === source && esSymbolType === target)) {
-                        reportError(Diagnostics._0_is_a_primitive_but_1_is_a_wrapper_object_Prefer_using_0_when_possible, targetType, sourceType);
+                    (getGlobalESSymbolType(/*reportErrors*/ false) === source && esSymbolType === target)) {
+                    reportError(Diagnostics._0_is_a_primitive_but_1_is_a_wrapper_object_Prefer_using_0_when_possible, targetType, sourceType);
+                }
+            }
+
+            function isUnionOrIntersectionTypeWithoutNullableConstituents(type: Type): boolean {
+                if (!(type.flags & TypeFlags.UnionOrIntersection)) {
+                    return false;
+                }
+                // at this point we know that this is union or intersection type possibly with nullable constituents.
+                // check if we still will have compound type if we ignore nullable components.
+                let seenNonNullable = false;
+                for (const t of (<UnionOrIntersectionType>type).types) {
+                    if (t.flags & TypeFlags.Nullable) {
+                        continue;
+                    }
+                    if (seenNonNullable) {
+                        return true;
+                    }
+                    seenNonNullable = true;
                 }
+                return false;
             }
 
-            // Compare two types and return
-            // Ternary.True if they are related with no assumptions,
-            // Ternary.Maybe if they are related with assumptions of other relationships, or
-            // Ternary.False if they are not related.
+            /**
+             * Compare two types and return
+             * * Ternary.True if they are related with no assumptions,
+             * * Ternary.Maybe if they are related with assumptions of other relationships, or
+             * * Ternary.False if they are not related.
+             */
             function isRelatedTo(source: Type, target: Type, reportErrors?: boolean, headMessage?: DiagnosticMessage): Ternary {
-                let result: Ternary;
                 if (source.flags & TypeFlags.StringOrNumberLiteral && source.flags & TypeFlags.FreshLiteral) {
                     source = (<LiteralType>source).regularType;
                 }
@@ -6473,7 +8837,7 @@ namespace ts {
 
                 if (isSimpleTypeRelatedTo(source, target, relation, reportErrors ? reportError : undefined)) return Ternary.True;
 
-                if (source.flags & TypeFlags.ObjectLiteral && source.flags & TypeFlags.FreshLiteral) {
+                if (getObjectFlags(source) & ObjectFlags.ObjectLiteral && source.flags & TypeFlags.FreshLiteral) {
                     if (hasExcessProperties(<FreshObjectLiteralType>source, target, reportErrors)) {
                         if (reportErrors) {
                             reportRelationError(headMessage, source, target);
@@ -6484,38 +8848,47 @@ namespace ts {
                     // and intersection types are further deconstructed on the target side, we don't want to
                     // make the check again (as it might fail for a partial target type). Therefore we obtain
                     // the regular source type and proceed with that.
-                    if (target.flags & TypeFlags.UnionOrIntersection) {
+                    if (isUnionOrIntersectionTypeWithoutNullableConstituents(target)) {
                         source = getRegularTypeOfObjectLiteral(source);
                     }
                 }
 
-                const saveErrorInfo = errorInfo;
-
-                // Note that these checks are specifically ordered to produce correct results.
-                if (source.flags & TypeFlags.Union) {
-                    if (relation === comparableRelation) {
-                        result = someTypeRelatedToType(source as UnionType, target, reportErrors && !(source.flags & TypeFlags.Primitive));
-                    }
-                    else {
-                        result = eachTypeRelatedToType(source as UnionType, target, reportErrors && !(source.flags & TypeFlags.Primitive));
-                    }
-
-                    if (result) {
-                        return result;
+                if (relation !== comparableRelation &&
+                    !(source.flags & TypeFlags.UnionOrIntersection) &&
+                    !(target.flags & TypeFlags.Union) &&
+                    !isIntersectionConstituent &&
+                    source !== globalObjectType &&
+                    getPropertiesOfType(source).length > 0 &&
+                    isWeakType(target) &&
+                    !hasCommonProperties(source, target)) {
+                    if (reportErrors) {
+                        reportError(Diagnostics.Type_0_has_no_properties_in_common_with_type_1, typeToString(source), typeToString(target));
                     }
+                    return Ternary.False;
                 }
-                else if (target.flags & TypeFlags.Intersection) {
-                    result = typeRelatedToEachType(source, target as IntersectionType, reportErrors);
 
-                    if (result) {
-                        return result;
-                    }
+                let result = Ternary.False;
+                const saveErrorInfo = errorInfo;
+                const saveIsIntersectionConstituent = isIntersectionConstituent;
+                isIntersectionConstituent = false;
+
+                // Note that these checks are specifically ordered to produce correct results. In particular,
+                // we need to deconstruct unions before intersections (because unions are always at the top),
+                // and we need to handle "each" relations before "some" relations for the same kind of type.
+                if (source.flags & TypeFlags.Union) {
+                    result = relation === comparableRelation ?
+                        someTypeRelatedToType(source as UnionType, target, reportErrors && !(source.flags & TypeFlags.Primitive)) :
+                        eachTypeRelatedToType(source as UnionType, target, reportErrors && !(source.flags & TypeFlags.Primitive));
                 }
                 else {
-                    // It is necessary to try these "some" checks on both sides because there may be nested "each" checks
-                    // on either side that need to be prioritized. For example, A | B = (A | B) & (C | D) or
-                    // A & B = (A & B) | (C & D).
-                    if (source.flags & TypeFlags.Intersection) {
+                    if (target.flags & TypeFlags.Union) {
+                        result = typeRelatedToSomeType(source, <UnionType>target, reportErrors && !(source.flags & TypeFlags.Primitive) && !(target.flags & TypeFlags.Primitive));
+                    }
+                    else if (target.flags & TypeFlags.Intersection) {
+                        isIntersectionConstituent = true;
+                        result = typeRelatedToEachType(source, target as IntersectionType, reportErrors);
+                    }
+                    else if (source.flags & TypeFlags.Intersection) {
                         // Check to see if any constituents of the intersection are immediately related to the target.
                         //
                         // Don't report errors though. Checking whether a constituent is related to the source is not actually
@@ -6529,84 +8902,38 @@ namespace ts {
                         //
                         //    - For a primitive type or type parameter (such as 'number = A & B') there is no point in
                         //          breaking the intersection apart.
-                        if (result = someTypeRelatedToType(<IntersectionType>source, target, /*reportErrors*/ false)) {
-                            return result;
-                        }
-                    }
-                    if (target.flags & TypeFlags.Union) {
-                        if (result = typeRelatedToSomeType(source, <UnionType>target, reportErrors && !(source.flags & TypeFlags.Primitive) && !(target.flags & TypeFlags.Primitive))) {
-                            return result;
-                        }
-                    }
-                }
-
-                if (source.flags & TypeFlags.TypeParameter) {
-                    let constraint = getConstraintOfTypeParameter(<TypeParameter>source);
-
-                    if (!constraint || constraint.flags & TypeFlags.Any) {
-                        constraint = emptyObjectType;
-                    }
-
-                    // The constraint may need to be further instantiated with its 'this' type.
-                    constraint = getTypeWithThisArgument(constraint, source);
-
-                    // Report constraint errors only if the constraint is not the empty object type
-                    const reportConstraintErrors = reportErrors && constraint !== emptyObjectType;
-                    if (result = isRelatedTo(constraint, target, reportConstraintErrors)) {
-                        errorInfo = saveErrorInfo;
-                        return result;
+                        result = someTypeRelatedToType(<IntersectionType>source, target, /*reportErrors*/ false);
                     }
-                }
-                else {
-                    if (source.flags & TypeFlags.Reference && target.flags & TypeFlags.Reference && (<TypeReference>source).target === (<TypeReference>target).target) {
-                        // We have type references to same target type, see if relationship holds for all type arguments
-                        if (result = typeArgumentsRelatedTo(<TypeReference>source, <TypeReference>target, reportErrors)) {
-                            return result;
-                        }
-                    }
-                    // Even if relationship doesn't hold for unions, intersections, or generic type references,
-                    // it may hold in a structural comparison.
-                    const apparentSource = getApparentType(source);
-                    // In a check of the form X = A & B, we will have previously checked if A relates to X or B relates
-                    // to X. Failing both of those we want to check if the aggregation of A and B's members structurally
-                    // relates to X. Thus, we include intersection types on the source side here.
-                    if (apparentSource.flags & (TypeFlags.ObjectType | TypeFlags.Intersection) && target.flags & TypeFlags.ObjectType) {
-                        // Report structural errors only if we haven't reported any errors yet
-                        const reportStructuralErrors = reportErrors && errorInfo === saveErrorInfo && !(source.flags & TypeFlags.Primitive);
-                        if (result = objectTypeRelatedTo(apparentSource, source, target, reportStructuralErrors)) {
+                    if (!result && (source.flags & TypeFlags.StructuredOrTypeVariable || target.flags & TypeFlags.StructuredOrTypeVariable)) {
+                        if (result = recursiveTypeRelatedTo(source, target, reportErrors)) {
                             errorInfo = saveErrorInfo;
-                            return result;
                         }
                     }
                 }
 
-                if (reportErrors) {
-                    if (source.flags & TypeFlags.ObjectType && target.flags & TypeFlags.Primitive) {
+                isIntersectionConstituent = saveIsIntersectionConstituent;
+
+                if (!result && reportErrors) {
+                    if (source.flags & TypeFlags.Object && target.flags & TypeFlags.Primitive) {
                         tryElaborateErrorsForPrimitivesAndObjects(source, target);
                     }
-                    else if (source.symbol && source.flags & TypeFlags.ObjectType && globalObjectType === source) {
+                    else if (source.symbol && source.flags & TypeFlags.Object && globalObjectType === source) {
                         reportError(Diagnostics.The_Object_type_is_assignable_to_very_few_other_types_Did_you_mean_to_use_the_any_type_instead);
                     }
                     reportRelationError(headMessage, source, target);
                 }
-                return Ternary.False;
+                return result;
             }
 
             function isIdenticalTo(source: Type, target: Type): Ternary {
                 let result: Ternary;
-                if (source.flags & TypeFlags.ObjectType && target.flags & TypeFlags.ObjectType) {
-                    if (source.flags & TypeFlags.Reference && target.flags & TypeFlags.Reference && (<TypeReference>source).target === (<TypeReference>target).target) {
-                        // We have type references to same target type, see if all type arguments are identical
-                        if (result = typeArgumentsRelatedTo(<TypeReference>source, <TypeReference>target, /*reportErrors*/ false)) {
-                            return result;
-                        }
-                    }
-                    return objectTypeRelatedTo(source, source, target, /*reportErrors*/ false);
+                if (source.flags & TypeFlags.Object && target.flags & TypeFlags.Object) {
+                    return recursiveTypeRelatedTo(source, target, /*reportErrors*/ false);
                 }
                 if (source.flags & TypeFlags.Union && target.flags & TypeFlags.Union ||
                     source.flags & TypeFlags.Intersection && target.flags & TypeFlags.Intersection) {
-                    if (result = eachTypeRelatedToSomeType(<UnionOrIntersectionType>source, <UnionOrIntersectionType>target, /*reportErrors*/ false)) {
-                        if (result &= eachTypeRelatedToSomeType(<UnionOrIntersectionType>target, <UnionOrIntersectionType>source, /*reportErrors*/ false)) {
+                    if (result = eachTypeRelatedToSomeType(<UnionOrIntersectionType>source, <UnionOrIntersectionType>target)) {
+                        if (result &= eachTypeRelatedToSomeType(<UnionOrIntersectionType>target, <UnionOrIntersectionType>source)) {
                             return result;
                         }
                     }
@@ -6614,50 +8941,34 @@ namespace ts {
                 return Ternary.False;
             }
 
-            // Check if a property with the given name is known anywhere in the given type. In an object type, a property
-            // is considered known if the object type is empty and the check is for assignability, if the object type has
-            // index signatures, or if the property is actually declared in the object type. In a union or intersection
-            // type, a property is considered known if it is known in any constituent type.
-            function isKnownProperty(type: Type, name: string): boolean {
-                if (type.flags & TypeFlags.ObjectType) {
-                    const resolved = resolveStructuredTypeMembers(type);
-                    if ((relation === assignableRelation || relation === comparableRelation) && (type === globalObjectType || isEmptyObjectType(resolved)) ||
-                        resolved.stringIndexInfo ||
-                        (resolved.numberIndexInfo && isNumericLiteralName(name)) ||
-                        getPropertyOfType(type, name)) {
-                        return true;
-                    }
-                }
-                else if (type.flags & TypeFlags.UnionOrIntersection) {
-                    for (const t of (<UnionOrIntersectionType>type).types) {
-                        if (isKnownProperty(t, name)) {
-                            return true;
-                        }
-                    }
-                }
-                return false;
-            }
-
-            function isEmptyObjectType(t: ResolvedType) {
-                return t.properties.length === 0 &&
-                    t.callSignatures.length === 0 &&
-                    t.constructSignatures.length === 0 &&
-                    !t.stringIndexInfo &&
-                    !t.numberIndexInfo;
-            }
-
             function hasExcessProperties(source: FreshObjectLiteralType, target: Type, reportErrors: boolean): boolean {
-                if (!(target.flags & TypeFlags.ObjectLiteralPatternWithComputedProperties) && maybeTypeOfKind(target, TypeFlags.ObjectType)) {
+                if (maybeTypeOfKind(target, TypeFlags.Object) && !(getObjectFlags(target) & ObjectFlags.ObjectLiteralPatternWithComputedProperties)) {
+                    const isComparingJsxAttributes = !!(source.flags & TypeFlags.JsxAttributes);
+                    if ((relation === assignableRelation || relation === comparableRelation) &&
+                        (isTypeSubsetOf(globalObjectType, target) || (!isComparingJsxAttributes && isEmptyObjectType(target)))) {
+                        return false;
+                    }
                     for (const prop of getPropertiesOfObjectType(source)) {
-                        if (!isKnownProperty(target, prop.name)) {
+                        if (!isKnownProperty(target, prop.name, isComparingJsxAttributes)) {
                             if (reportErrors) {
                                 // We know *exactly* where things went wrong when comparing the types.
                                 // Use this property as the error node as this will be more helpful in
                                 // reasoning about what went wrong.
                                 Debug.assert(!!errorNode);
-                                errorNode = prop.valueDeclaration;
-                                reportError(Diagnostics.Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1,
-                                    symbolToString(prop), typeToString(target));
+                                if (isJsxAttributes(errorNode) || isJsxOpeningLikeElement(errorNode)) {
+                                    // JsxAttributes has an object-literal flag and undergo same type-assignablity check as normal object-literal.
+                                    // However, using an object-literal error message will be very confusing to the users so we give different a message.
+                                    reportError(Diagnostics.Property_0_does_not_exist_on_type_1, symbolToString(prop), typeToString(target));
+                                }
+                                else {
+                                    // use the property's value declaration if the property is assigned inside the literal itself
+                                    const objectLiteralDeclaration = source.symbol && firstOrUndefined(source.symbol.declarations);
+                                    if (prop.valueDeclaration && findAncestor(prop.valueDeclaration, d => d === objectLiteralDeclaration)) {
+                                        errorNode = prop.valueDeclaration;
+                                    }
+                                    reportError(Diagnostics.Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1,
+                                        symbolToString(prop), typeToString(target));
+                                }
                             }
                             return true;
                         }
@@ -6666,7 +8977,7 @@ namespace ts {
                 return false;
             }
 
-            function eachTypeRelatedToSomeType(source: UnionOrIntersectionType, target: UnionOrIntersectionType, reportErrors: boolean): Ternary {
+            function eachTypeRelatedToSomeType(source: UnionOrIntersectionType, target: UnionOrIntersectionType): Ternary {
                 let result = Ternary.True;
                 const sourceTypes = source.types;
                 for (const sourceType of sourceTypes) {
@@ -6684,17 +8995,37 @@ namespace ts {
                 if (target.flags & TypeFlags.Union && containsType(targetTypes, source)) {
                     return Ternary.True;
                 }
-                const len = targetTypes.length;
-                for (let i = 0; i < len; i++) {
-                    const related = isRelatedTo(source, targetTypes[i], reportErrors && i === len - 1);
+                for (const type of targetTypes) {
+                    const related = isRelatedTo(source, type, /*reportErrors*/ false);
                     if (related) {
                         return related;
                     }
                 }
+                if (reportErrors) {
+                    const discriminantType = findMatchingDiscriminantType(source, target);
+                    isRelatedTo(source, discriminantType || targetTypes[targetTypes.length - 1], /*reportErrors*/ true);
+                }
                 return Ternary.False;
             }
 
-            function typeRelatedToEachType(source: Type, target: UnionOrIntersectionType, reportErrors: boolean): Ternary {
+            function findMatchingDiscriminantType(source: Type, target: UnionOrIntersectionType) {
+                const sourceProperties = getPropertiesOfObjectType(source);
+                if (sourceProperties) {
+                    for (const sourceProperty of sourceProperties) {
+                        if (isDiscriminantProperty(target, sourceProperty.name)) {
+                            const sourceType = getTypeOfSymbol(sourceProperty);
+                            for (const type of target.types) {
+                                const targetType = getTypeOfPropertyOfType(type, sourceProperty.name);
+                                if (targetType && isRelatedTo(sourceType, targetType)) {
+                                    return type;
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+
+            function typeRelatedToEachType(source: Type, target: IntersectionType, reportErrors: boolean): Ternary {
                 let result = Ternary.True;
                 const targetTypes = target.types;
                 for (const targetType of targetTypes) {
@@ -6753,22 +9084,22 @@ namespace ts {
                 return result;
             }
 
-            // Determine if two object types are related by structure. First, check if the result is already available in the global cache.
+            // Determine if possibly recursive types are related. First, check if the result is already available in the global cache.
             // Second, check if we have already started a comparison of the given two types in which case we assume the result to be true.
             // Third, check if both types are part of deeply nested chains of generic type instantiations and if so assume the types are
             // equal and infinitely expanding. Fourth, if we have reached a depth of 100 nested comparisons, assume we have runaway recursion
             // and issue an error. Otherwise, actually compare the structure of the two types.
-            function objectTypeRelatedTo(source: Type, originalSource: Type, target: Type, reportErrors: boolean): Ternary {
+            function recursiveTypeRelatedTo(source: Type, target: Type, reportErrors: boolean): Ternary {
                 if (overflow) {
                     return Ternary.False;
                 }
                 const id = relation !== identityRelation || source.id < target.id ? source.id + "," + target.id : target.id + "," + source.id;
-                const related = relation[id];
+                const related = relation.get(id);
                 if (related !== undefined) {
                     if (reportErrors && related === RelationComparisonResult.Failed) {
                         // We are elaborating errors and the cached result is an unreported failure. Record the result as a reported
                         // failure and continue computing the relation such that errors get reported.
-                        relation[id] = RelationComparisonResult.FailedAndReported;
+                        relation.set(id, RelationComparisonResult.FailedAndReported);
                     }
                     else {
                         return related === RelationComparisonResult.Succeeded ? Ternary.True : Ternary.False;
@@ -6777,7 +9108,7 @@ namespace ts {
                 if (depth > 0) {
                     for (let i = 0; i < depth; i++) {
                         // If source and target are already being compared, consider them related with assumptions
-                        if (maybeStack[i][id]) {
+                        if (maybeStack[i].get(id)) {
                             return Ternary.Maybe;
                         }
                     }
@@ -6795,56 +9126,207 @@ namespace ts {
                 sourceStack[depth] = source;
                 targetStack[depth] = target;
                 maybeStack[depth] = createMap<RelationComparisonResult>();
-                maybeStack[depth][id] = RelationComparisonResult.Succeeded;
+                maybeStack[depth].set(id, RelationComparisonResult.Succeeded);
                 depth++;
                 const saveExpandingFlags = expandingFlags;
-                if (!(expandingFlags & 1) && isDeeplyNestedGeneric(source, sourceStack, depth)) expandingFlags |= 1;
-                if (!(expandingFlags & 2) && isDeeplyNestedGeneric(target, targetStack, depth)) expandingFlags |= 2;
-                let result: Ternary;
-                if (expandingFlags === 3) {
-                    result = Ternary.Maybe;
-                }
-                else {
-                    result = propertiesRelatedTo(source, target, reportErrors);
-                    if (result) {
-                        result &= signaturesRelatedTo(source, target, SignatureKind.Call, reportErrors);
-                        if (result) {
-                            result &= signaturesRelatedTo(source, target, SignatureKind.Construct, reportErrors);
-                            if (result) {
-                                result &= indexTypesRelatedTo(source, originalSource, target, IndexKind.String, reportErrors);
-                                if (result) {
-                                    result &= indexTypesRelatedTo(source, originalSource, target, IndexKind.Number, reportErrors);
-                                }
-                            }
-                        }
-                    }
-                }
+                if (!(expandingFlags & 1) && isDeeplyNestedType(source, sourceStack, depth)) expandingFlags |= 1;
+                if (!(expandingFlags & 2) && isDeeplyNestedType(target, targetStack, depth)) expandingFlags |= 2;
+                const result = expandingFlags !== 3 ? structuredTypeRelatedTo(source, target, reportErrors) : Ternary.Maybe;
                 expandingFlags = saveExpandingFlags;
                 depth--;
                 if (result) {
                     const maybeCache = maybeStack[depth];
                     // If result is definitely true, copy assumptions to global cache, else copy to next level up
                     const destinationCache = (result === Ternary.True || depth === 0) ? relation : maybeStack[depth - 1];
-                    copyProperties(maybeCache, destinationCache);
+                    copyEntries(maybeCache, destinationCache);
                 }
                 else {
                     // A false result goes straight into global cache (when something is false under assumptions it
                     // will also be false without assumptions)
-                    relation[id] = reportErrors ? RelationComparisonResult.FailedAndReported : RelationComparisonResult.Failed;
+                    relation.set(id, reportErrors ? RelationComparisonResult.FailedAndReported : RelationComparisonResult.Failed);
                 }
                 return result;
             }
 
+            function structuredTypeRelatedTo(source: Type, target: Type, reportErrors: boolean): Ternary {
+                let result: Ternary;
+                const saveErrorInfo = errorInfo;
+                if (target.flags & TypeFlags.TypeParameter) {
+                    // A source type { [P in keyof T]: X } is related to a target type T if X is related to T[P].
+                    if (getObjectFlags(source) & ObjectFlags.Mapped && getConstraintTypeFromMappedType(<MappedType>source) === getIndexType(target)) {
+                        if (!(<MappedType>source).declaration.questionToken) {
+                            const templateType = getTemplateTypeFromMappedType(<MappedType>source);
+                            const indexedAccessType = getIndexedAccessType(target, getTypeParameterFromMappedType(<MappedType>source));
+                            if (result = isRelatedTo(templateType, indexedAccessType, reportErrors)) {
+                                return result;
+                            }
+                        }
+                    }
+                }
+                else if (target.flags & TypeFlags.Index) {
+                    // A keyof S is related to a keyof T if T is related to S.
+                    if (source.flags & TypeFlags.Index) {
+                        if (result = isRelatedTo((<IndexType>target).type, (<IndexType>source).type, /*reportErrors*/ false)) {
+                            return result;
+                        }
+                    }
+                    // A type S is assignable to keyof T if S is assignable to keyof C, where C is the
+                    // constraint of T.
+                    const constraint = getConstraintOfType((<IndexType>target).type);
+                    if (constraint) {
+                        if (result = isRelatedTo(source, getIndexType(constraint), reportErrors)) {
+                            return result;
+                        }
+                    }
+                }
+                else if (target.flags & TypeFlags.IndexedAccess) {
+                    // A type S is related to a type T[K] if S is related to A[K], where K is string-like and
+                    // A is the apparent type of S.
+                    const constraint = getConstraintOfType(<IndexedAccessType>target);
+                    if (constraint) {
+                        if (result = isRelatedTo(source, constraint, reportErrors)) {
+                            errorInfo = saveErrorInfo;
+                            return result;
+                        }
+                    }
+                }
+
+                if (source.flags & TypeFlags.TypeParameter) {
+                    // A source type T is related to a target type { [P in keyof T]: X } if T[P] is related to X.
+                    if (getObjectFlags(target) & ObjectFlags.Mapped && getConstraintTypeFromMappedType(<MappedType>target) === getIndexType(source)) {
+                        const indexedAccessType = getIndexedAccessType(source, getTypeParameterFromMappedType(<MappedType>target));
+                        const templateType = getTemplateTypeFromMappedType(<MappedType>target);
+                        if (result = isRelatedTo(indexedAccessType, templateType, reportErrors)) {
+                            errorInfo = saveErrorInfo;
+                            return result;
+                        }
+                    }
+                    else {
+                        let constraint = getConstraintOfTypeParameter(<TypeParameter>source);
+                        // A type parameter with no constraint is not related to the non-primitive object type.
+                        if (constraint || !(target.flags & TypeFlags.NonPrimitive)) {
+                            if (!constraint || constraint.flags & TypeFlags.Any) {
+                                constraint = emptyObjectType;
+                            }
+                            // The constraint may need to be further instantiated with its 'this' type.
+                            constraint = getTypeWithThisArgument(constraint, source);
+                            // Report constraint errors only if the constraint is not the empty object type
+                            const reportConstraintErrors = reportErrors && constraint !== emptyObjectType;
+                            if (result = isRelatedTo(constraint, target, reportConstraintErrors)) {
+                                errorInfo = saveErrorInfo;
+                                return result;
+                            }
+                        }
+                    }
+                }
+                else if (source.flags & TypeFlags.IndexedAccess) {
+                    // A type S[K] is related to a type T if A[K] is related to T, where K is string-like and
+                    // A is the apparent type of S.
+                    const constraint = getConstraintOfType(<IndexedAccessType>source);
+                    if (constraint) {
+                        if (result = isRelatedTo(constraint, target, reportErrors)) {
+                            errorInfo = saveErrorInfo;
+                            return result;
+                        }
+                    }
+                    else if (target.flags & TypeFlags.IndexedAccess && (<IndexedAccessType>source).indexType === (<IndexedAccessType>target).indexType) {
+                        // if we have indexed access types with identical index types, see if relationship holds for
+                        // the two object types.
+                        if (result = isRelatedTo((<IndexedAccessType>source).objectType, (<IndexedAccessType>target).objectType, reportErrors)) {
+                            return result;
+                        }
+                    }
+                }
+                else {
+                    if (getObjectFlags(source) & ObjectFlags.Reference && getObjectFlags(target) & ObjectFlags.Reference && (<TypeReference>source).target === (<TypeReference>target).target) {
+                        // We have type references to same target type, see if relationship holds for all type arguments
+                        if (result = typeArgumentsRelatedTo(<TypeReference>source, <TypeReference>target, reportErrors)) {
+                            return result;
+                        }
+                    }
+                    // Even if relationship doesn't hold for unions, intersections, or generic type references,
+                    // it may hold in a structural comparison.
+                    const sourceIsPrimitive = !!(source.flags & TypeFlags.Primitive);
+                    if (relation !== identityRelation) {
+                        source = getApparentType(source);
+                    }
+                    // In a check of the form X = A & B, we will have previously checked if A relates to X or B relates
+                    // to X. Failing both of those we want to check if the aggregation of A and B's members structurally
+                    // relates to X. Thus, we include intersection types on the source side here.
+                    if (source.flags & (TypeFlags.Object | TypeFlags.Intersection) && target.flags & TypeFlags.Object) {
+                        // Report structural errors only if we haven't reported any errors yet
+                        const reportStructuralErrors = reportErrors && errorInfo === saveErrorInfo && !sourceIsPrimitive;
+                        if (isGenericMappedType(source) || isGenericMappedType(target)) {
+                            result = mappedTypeRelatedTo(source, target, reportStructuralErrors);
+                        }
+                        else {
+                            result = propertiesRelatedTo(source, target, reportStructuralErrors);
+                            if (result) {
+                                result &= signaturesRelatedTo(source, target, SignatureKind.Call, reportStructuralErrors);
+                                if (result) {
+                                    result &= signaturesRelatedTo(source, target, SignatureKind.Construct, reportStructuralErrors);
+                                    if (result) {
+                                        result &= indexTypesRelatedTo(source, target, IndexKind.String, sourceIsPrimitive, reportStructuralErrors);
+                                        if (result) {
+                                            result &= indexTypesRelatedTo(source, target, IndexKind.Number, sourceIsPrimitive, reportStructuralErrors);
+                                        }
+                                    }
+                                }
+                            }
+                        }
+                        if (result) {
+                            errorInfo = saveErrorInfo;
+                            return result;
+                        }
+                    }
+                }
+                return Ternary.False;
+            }
+
+            // A type [P in S]: X is related to a type [Q in T]: Y if T is related to S and X' is
+            // related to Y, where X' is an instantiation of X in which P is replaced with Q. Notice
+            // that S and T are contra-variant whereas X and Y are co-variant.
+            function mappedTypeRelatedTo(source: Type, target: Type, reportErrors: boolean): Ternary {
+                if (isGenericMappedType(target)) {
+                    if (isGenericMappedType(source)) {
+                        const sourceReadonly = !!(<MappedType>source).declaration.readonlyToken;
+                        const sourceOptional = !!(<MappedType>source).declaration.questionToken;
+                        const targetReadonly = !!(<MappedType>target).declaration.readonlyToken;
+                        const targetOptional = !!(<MappedType>target).declaration.questionToken;
+                        const modifiersRelated = relation === identityRelation ?
+                            sourceReadonly === targetReadonly && sourceOptional === targetOptional :
+                            relation === comparableRelation || !sourceOptional || targetOptional;
+                        if (modifiersRelated) {
+                            let result: Ternary;
+                            if (result = isRelatedTo(getConstraintTypeFromMappedType(<MappedType>target), getConstraintTypeFromMappedType(<MappedType>source), reportErrors)) {
+                                const mapper = createTypeMapper([getTypeParameterFromMappedType(<MappedType>source)], [getTypeParameterFromMappedType(<MappedType>target)]);
+                                return result & isRelatedTo(instantiateType(getTemplateTypeFromMappedType(<MappedType>source), mapper), getTemplateTypeFromMappedType(<MappedType>target), reportErrors);
+                            }
+                        }
+                    }
+                    else if ((<MappedType>target).declaration.questionToken && isEmptyObjectType(source)) {
+                        return Ternary.True;
+
+                    }
+                }
+                else if (relation !== identityRelation) {
+                    const resolved = resolveStructuredTypeMembers(<ObjectType>target);
+                    if (isEmptyResolvedType(resolved) || resolved.stringIndexInfo && resolved.stringIndexInfo.type.flags & TypeFlags.Any) {
+                        return Ternary.True;
+                    }
+                }
+                return Ternary.False;
+            }
+
             function propertiesRelatedTo(source: Type, target: Type, reportErrors: boolean): Ternary {
                 if (relation === identityRelation) {
                     return propertiesIdenticalTo(source, target);
                 }
                 let result = Ternary.True;
                 const properties = getPropertiesOfObjectType(target);
-                const requireOptionalProperties = relation === subtypeRelation && !(source.flags & TypeFlags.ObjectLiteral);
+                const requireOptionalProperties = relation === subtypeRelation && !(getObjectFlags(source) & ObjectFlags.ObjectLiteral);
                 for (const targetProp of properties) {
                     const sourceProp = getPropertyOfType(source, targetProp.name);
-
                     if (sourceProp !== targetProp) {
                         if (!sourceProp) {
                             if (!(targetProp.flags & SymbolFlags.Optional) || requireOptionalProperties) {
@@ -6858,6 +9340,12 @@ namespace ts {
                             const sourcePropFlags = getDeclarationModifierFlagsFromSymbol(sourceProp);
                             const targetPropFlags = getDeclarationModifierFlagsFromSymbol(targetProp);
                             if (sourcePropFlags & ModifierFlags.Private || targetPropFlags & ModifierFlags.Private) {
+                                if (getCheckFlags(sourceProp) & CheckFlags.ContainsPrivate) {
+                                    if (reportErrors) {
+                                        reportError(Diagnostics.Property_0_has_conflicting_declarations_and_is_inaccessible_in_type_1, symbolToString(sourceProp), typeToString(source));
+                                    }
+                                    return Ternary.False;
+                                }
                                 if (sourceProp.valueDeclaration !== targetProp.valueDeclaration) {
                                     if (reportErrors) {
                                         if (sourcePropFlags & ModifierFlags.Private && targetPropFlags & ModifierFlags.Private) {
@@ -6873,13 +9361,10 @@ namespace ts {
                                 }
                             }
                             else if (targetPropFlags & ModifierFlags.Protected) {
-                                const sourceDeclaredInClass = sourceProp.parent && sourceProp.parent.flags & SymbolFlags.Class;
-                                const sourceClass = sourceDeclaredInClass ? <InterfaceType>getDeclaredTypeOfSymbol(getParentOfSymbol(sourceProp)) : undefined;
-                                const targetClass = <InterfaceType>getDeclaredTypeOfSymbol(getParentOfSymbol(targetProp));
-                                if (!sourceClass || !hasBaseType(sourceClass, targetClass)) {
+                                if (!isValidOverrideOf(sourceProp, targetProp)) {
                                     if (reportErrors) {
-                                        reportError(Diagnostics.Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2,
-                                            symbolToString(targetProp), typeToString(sourceClass || source), typeToString(targetClass));
+                                        reportError(Diagnostics.Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2, symbolToString(targetProp),
+                                            typeToString(getDeclaringClass(sourceProp) || source), typeToString(getDeclaringClass(targetProp) || target));
                                     }
                                     return Ternary.False;
                                 }
@@ -6899,7 +9384,8 @@ namespace ts {
                                 return Ternary.False;
                             }
                             result &= related;
-                            if (sourceProp.flags & SymbolFlags.Optional && !(targetProp.flags & SymbolFlags.Optional)) {
+                            // When checking for comparability, be more lenient with optional properties.
+                            if (relation !== comparableRelation && sourceProp.flags & SymbolFlags.Optional && !(targetProp.flags & SymbolFlags.Optional)) {
                                 // TypeScript 1.0 spec (April 2014): 3.8.3
                                 // S is a subtype of a type T, and T is a supertype of S if ...
                                 // S' and T are object types and, for each member M in T..
@@ -6919,8 +9405,36 @@ namespace ts {
                 return result;
             }
 
+            /**
+             * A type is 'weak' if it is an object type with at least one optional property
+             * and no required properties, call/construct signatures or index signatures
+             */
+            function isWeakType(type: Type): boolean {
+                if (type.flags & TypeFlags.Object) {
+                    const resolved = resolveStructuredTypeMembers(<ObjectType>type);
+                    return resolved.callSignatures.length === 0 && resolved.constructSignatures.length === 0 &&
+                        !resolved.stringIndexInfo && !resolved.numberIndexInfo &&
+                        resolved.properties.length > 0 &&
+                        every(resolved.properties, p => !!(p.flags & SymbolFlags.Optional));
+                }
+                if (type.flags & TypeFlags.Intersection) {
+                    return every((<IntersectionType>type).types, isWeakType);
+                }
+                return false;
+            }
+
+            function hasCommonProperties(source: Type, target: Type) {
+                const isComparingJsxAttributes = !!(source.flags & TypeFlags.JsxAttributes);
+                for (const prop of getPropertiesOfType(source)) {
+                    if (isKnownProperty(target, prop.name, isComparingJsxAttributes)) {
+                        return true;
+                    }
+                }
+                return false;
+            }
+
             function propertiesIdenticalTo(source: Type, target: Type): Ternary {
-                if (!(source.flags & TypeFlags.ObjectType && target.flags & TypeFlags.ObjectType)) {
+                if (!(source.flags & TypeFlags.Object && target.flags & TypeFlags.Object)) {
                     return Ternary.False;
                 }
                 const sourceProperties = getPropertiesOfObjectType(source);
@@ -6972,25 +9486,49 @@ namespace ts {
                 let result = Ternary.True;
                 const saveErrorInfo = errorInfo;
 
-                outer: for (const t of targetSignatures) {
-                    // Only elaborate errors from the first failure
-                    let shouldElaborateErrors = reportErrors;
-                    for (const s of sourceSignatures) {
-                        const related = signatureRelatedTo(s, t, shouldElaborateErrors);
-                        if (related) {
-                            result &= related;
-                            errorInfo = saveErrorInfo;
-                            continue outer;
+                if (getObjectFlags(source) & ObjectFlags.Instantiated && getObjectFlags(target) & ObjectFlags.Instantiated && source.symbol === target.symbol) {
+                    // We have instantiations of the same anonymous type (which typically will be the type of a
+                    // method). Simply do a pairwise comparison of the signatures in the two signature lists instead
+                    // of the much more expensive N * M comparison matrix we explore below. We erase type parameters
+                    // as they are known to always be the same.
+                    for (let i = 0; i < targetSignatures.length; i++) {
+                        const related = signatureRelatedTo(sourceSignatures[i], targetSignatures[i], /*erase*/ true, reportErrors);
+                        if (!related) {
+                            return Ternary.False;
                         }
-                        shouldElaborateErrors = false;
+                        result &= related;
                     }
+                }
+                else if (sourceSignatures.length === 1 && targetSignatures.length === 1) {
+                    // For simple functions (functions with a single signature) we only erase type parameters for
+                    // the comparable relation. Otherwise, if the source signature is generic, we instantiate it
+                    // in the context of the target signature before checking the relationship. Ideally we'd do
+                    // this regardless of the number of signatures, but the potential costs are prohibitive due
+                    // to the quadratic nature of the logic below.
+                    const eraseGenerics = relation === comparableRelation || compilerOptions.noStrictGenericChecks;
+                    result = signatureRelatedTo(sourceSignatures[0], targetSignatures[0], eraseGenerics, reportErrors);
+                }
+                else {
+                    outer: for (const t of targetSignatures) {
+                        // Only elaborate errors from the first failure
+                        let shouldElaborateErrors = reportErrors;
+                        for (const s of sourceSignatures) {
+                            const related = signatureRelatedTo(s, t, /*erase*/ true, shouldElaborateErrors);
+                            if (related) {
+                                result &= related;
+                                errorInfo = saveErrorInfo;
+                                continue outer;
+                            }
+                            shouldElaborateErrors = false;
+                        }
 
-                    if (shouldElaborateErrors) {
-                        reportError(Diagnostics.Type_0_provides_no_match_for_the_signature_1,
-                            typeToString(source),
-                            signatureToString(t, /*enclosingDeclaration*/ undefined, /*flags*/ undefined, kind));
+                        if (shouldElaborateErrors) {
+                            reportError(Diagnostics.Type_0_provides_no_match_for_the_signature_1,
+                                typeToString(source),
+                                signatureToString(t, /*enclosingDeclaration*/ undefined, /*flags*/ undefined, kind));
+                        }
+                        return Ternary.False;
                     }
-                    return Ternary.False;
                 }
                 return result;
             }
@@ -6998,8 +9536,9 @@ namespace ts {
             /**
              * See signatureAssignableTo, compareSignaturesIdentical
              */
-            function signatureRelatedTo(source: Signature, target: Signature, reportErrors: boolean): Ternary {
-                return compareSignaturesRelated(source, target, /*ignoreReturnTypes*/ false, reportErrors, reportError, isRelatedTo);
+            function signatureRelatedTo(source: Signature, target: Signature, erase: boolean, reportErrors: boolean): Ternary {
+                return compareSignaturesRelated(erase ? getErasedSignature(source) : source, erase ? getErasedSignature(target) : target,
+                    /*checkAsCallback*/ false, /*ignoreReturnTypes*/ false, reportErrors, reportError, isRelatedTo);
             }
 
             function signaturesIdenticalTo(source: Type, target: Type, kind: SignatureKind): Ternary {
@@ -7009,7 +9548,7 @@ namespace ts {
                     return Ternary.False;
                 }
                 let result = Ternary.True;
-                for (let i = 0, len = sourceSignatures.length; i < len; i++) {
+                for (let i = 0; i < sourceSignatures.length; i++) {
                     const related = compareSignaturesIdentical(sourceSignatures[i], targetSignatures[i], /*partialMatch*/ false, /*ignoreThisTypes*/ false, /*ignoreReturnTypes*/ false, isRelatedTo);
                     if (!related) {
                         return Ternary.False;
@@ -7044,12 +9583,12 @@ namespace ts {
                 return related;
             }
 
-            function indexTypesRelatedTo(source: Type, originalSource: Type, target: Type, kind: IndexKind, reportErrors: boolean) {
+            function indexTypesRelatedTo(source: Type, target: Type, kind: IndexKind, sourceIsPrimitive: boolean, reportErrors: boolean) {
                 if (relation === identityRelation) {
                     return indexTypesIdenticalTo(source, target, kind);
                 }
                 const targetInfo = getIndexInfoOfType(target, kind);
-                if (!targetInfo || ((targetInfo.type.flags & TypeFlags.Any) && !(originalSource.flags & TypeFlags.Primitive))) {
+                if (!targetInfo || targetInfo.type.flags & TypeFlags.Any && !sourceIsPrimitive) {
                     // Index signature of type any permits assignment from everything but primitives
                     return Ternary.True;
                 }
@@ -7120,9 +9659,52 @@ namespace ts {
             }
         }
 
+        // Invoke the callback for each underlying property symbol of the given symbol and return the first
+        // value that isn't undefined.
+        function forEachProperty<T>(prop: Symbol, callback: (p: Symbol) => T): T {
+            if (getCheckFlags(prop) & CheckFlags.Synthetic) {
+                for (const t of (<TransientSymbol>prop).containingType.types) {
+                    const p = getPropertyOfType(t, prop.name);
+                    const result = p && forEachProperty(p, callback);
+                    if (result) {
+                        return result;
+                    }
+                }
+                return undefined;
+            }
+            return callback(prop);
+        }
+
+        // Return the declaring class type of a property or undefined if property not declared in class
+        function getDeclaringClass(prop: Symbol) {
+            return prop.parent && prop.parent.flags & SymbolFlags.Class ? getDeclaredTypeOfSymbol(getParentOfSymbol(prop)) : undefined;
+        }
+
+        // Return true if some underlying source property is declared in a class that derives
+        // from the given base class.
+        function isPropertyInClassDerivedFrom(prop: Symbol, baseClass: Type) {
+            return forEachProperty(prop, sp => {
+                const sourceClass = getDeclaringClass(sp);
+                return sourceClass ? hasBaseType(sourceClass, baseClass) : false;
+            });
+        }
+
+        // Return true if source property is a valid override of protected parts of target property.
+        function isValidOverrideOf(sourceProp: Symbol, targetProp: Symbol) {
+            return !forEachProperty(targetProp, tp => getDeclarationModifierFlagsFromSymbol(tp) & ModifierFlags.Protected ?
+                !isPropertyInClassDerivedFrom(sourceProp, getDeclaringClass(tp)) : false);
+        }
+
+        // Return true if the given class derives from each of the declaring classes of the protected
+        // constituents of the given property.
+        function isClassDerivedFromDeclaringClasses(checkClass: Type, prop: Symbol) {
+            return forEachProperty(prop, p => getDeclarationModifierFlagsFromSymbol(p) & ModifierFlags.Protected ?
+                !hasBaseType(checkClass, getDeclaringClass(p)) : false) ? undefined : checkClass;
+        }
+
         // Return true if the given type is the constructor type for an abstract class
         function isAbstractConstructorType(type: Type) {
-            if (type.flags & TypeFlags.Anonymous) {
+            if (getObjectFlags(type) & ObjectFlags.Anonymous) {
                 const symbol = type.symbol;
                 if (symbol && symbol.flags & SymbolFlags.Class) {
                     const declaration = getClassLikeDeclarationOfSymbol(symbol);
@@ -7134,21 +9716,23 @@ namespace ts {
             return false;
         }
 
-        // Return true if the given type is part of a deeply nested chain of generic instantiations. We consider this to be the case
-        // when structural type comparisons have been started for 10 or more instantiations of the same generic type. It is possible,
-        // though highly unlikely, for this test to be true in a situation where a chain of instantiations is not infinitely expanding.
-        // Effectively, we will generate a false positive when two types are structurally equal to at least 10 levels, but unequal at
-        // some level beyond that.
-        function isDeeplyNestedGeneric(type: Type, stack: Type[], depth: number): boolean {
-            // We track type references (created by createTypeReference) and instantiated types (created by instantiateType)
-            if (type.flags & (TypeFlags.Reference | TypeFlags.Instantiated) && depth >= 5) {
+        // Return true if the given type is deeply nested. We consider this to be the case when structural type comparisons
+        // for 5 or more occurrences or instantiations of the type have been recorded on the given stack. It is possible,
+        // though highly unlikely, for this test to be true in a situation where a chain of instantiations is not infinitely
+        // expanding. Effectively, we will generate a false positive when two types are structurally equal to at least 5
+        // levels, but unequal at some level beyond that.
+        function isDeeplyNestedType(type: Type, stack: Type[], depth: number): boolean {
+            // We track all object types that have an associated symbol (representing the origin of the type)
+            if (depth >= 5 && type.flags & TypeFlags.Object) {
                 const symbol = type.symbol;
-                let count = 0;
-                for (let i = 0; i < depth; i++) {
-                    const t = stack[i];
-                    if (t.flags & (TypeFlags.Reference | TypeFlags.Instantiated) && t.symbol === symbol) {
-                        count++;
-                        if (count >= 5) return true;
+                if (symbol) {
+                    let count = 0;
+                    for (let i = 0; i < depth; i++) {
+                        const t = stack[i];
+                        if (t.flags & TypeFlags.Object && t.symbol === symbol) {
+                            count++;
+                            if (count >= 5) return true;
+                        }
                     }
                 }
             }
@@ -7224,7 +9808,7 @@ namespace ts {
             // the constraints with a common set of type arguments to get relatable entities in places where
             // type parameters occur in the constraints. The complexity of doing that doesn't seem worthwhile,
             // particularly as we're comparing erased versions of the signatures below.
-            if ((source.typeParameters ? source.typeParameters.length : 0) !== (target.typeParameters ? target.typeParameters.length : 0)) {
+            if (length(source.typeParameters) !== length(target.typeParameters)) {
                 return Ternary.False;
             }
             // Spec 1.0 Section 3.8.3 & 3.8.4:
@@ -7267,13 +9851,6 @@ namespace ts {
             return signature.hasRestParameter && parameterIndex >= signature.parameters.length - 1;
         }
 
-        function isSupertypeOfEach(candidate: Type, types: Type[]): boolean {
-            for (const t of types) {
-                if (candidate !== t && !isTypeSubtypeOf(t, candidate)) return false;
-            }
-            return true;
-        }
-
         function literalTypesWithSameBaseType(types: Type[]): boolean {
             let commonBaseType: Type;
             for (const t of types) {
@@ -7288,11 +9865,13 @@ namespace ts {
             return true;
         }
 
-        // When the candidate types are all literal types with the same base type, the common
-        // supertype is a union of those literal types. Otherwise, the common supertype is the
-        // first type that is a supertype of each of the other types.
+        // When the candidate types are all literal types with the same base type, return a union
+        // of those literal types. Otherwise, return the leftmost type for which no type to the
+        // right is a supertype.
         function getSupertypeOrUnion(types: Type[]): Type {
-            return literalTypesWithSameBaseType(types) ? getUnionType(types) : forEach(types, t => isSupertypeOfEach(t, types) ? t : undefined);
+            return literalTypesWithSameBaseType(types) ?
+                getUnionType(types) :
+                reduceLeft(types, (s, t) => isTypeSubtypeOf(s, t) ? t : s);
         }
 
         function getCommonSupertype(types: Type[]): Type {
@@ -7300,62 +9879,19 @@ namespace ts {
                 return getSupertypeOrUnion(types);
             }
             const primaryTypes = filter(types, t => !(t.flags & TypeFlags.Nullable));
-            if (!primaryTypes.length) {
-                return getUnionType(types, /*subtypeReduction*/ true);
-            }
-            const supertype = getSupertypeOrUnion(primaryTypes);
-            return supertype && includeFalsyTypes(supertype, getFalsyFlagsOfTypes(types) & TypeFlags.Nullable);
-        }
-
-        function reportNoCommonSupertypeError(types: Type[], errorLocation: Node, errorMessageChainHead: DiagnosticMessageChain): void {
-            // The downfallType/bestSupertypeDownfallType is the first type that caused a particular candidate
-            // to not be the common supertype. So if it weren't for this one downfallType (and possibly others),
-            // the type in question could have been the common supertype.
-            let bestSupertype: Type;
-            let bestSupertypeDownfallType: Type;
-            let bestSupertypeScore = 0;
-
-            for (let i = 0; i < types.length; i++) {
-                let score = 0;
-                let downfallType: Type = undefined;
-                for (let j = 0; j < types.length; j++) {
-                    if (isTypeSubtypeOf(types[j], types[i])) {
-                        score++;
-                    }
-                    else if (!downfallType) {
-                        downfallType = types[j];
-                    }
-                }
-
-                Debug.assert(!!downfallType, "If there is no common supertype, each type should have a downfallType");
-
-                if (score > bestSupertypeScore) {
-                    bestSupertype = types[i];
-                    bestSupertypeDownfallType = downfallType;
-                    bestSupertypeScore = score;
-                }
-
-                // types.length - 1 is the maximum score, given that getCommonSupertype returned false
-                if (bestSupertypeScore === types.length - 1) {
-                    break;
-                }
-            }
-
-            // In the following errors, the {1} slot is before the {0} slot because checkTypeSubtypeOf supplies the
-            // subtype as the first argument to the error
-            checkTypeSubtypeOf(bestSupertypeDownfallType, bestSupertype, errorLocation,
-                Diagnostics.Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0,
-                errorMessageChainHead);
+            return primaryTypes.length ?
+                getNullableType(getSupertypeOrUnion(primaryTypes), getFalsyFlagsOfTypes(types) & TypeFlags.Nullable) :
+                getUnionType(types, /*subtypeReduction*/ true);
         }
 
         function isArrayType(type: Type): boolean {
-            return type.flags & TypeFlags.Reference && (<TypeReference>type).target === globalArrayType;
+            return getObjectFlags(type) & ObjectFlags.Reference && (<TypeReference>type).target === globalArrayType;
         }
 
         function isArrayLikeType(type: Type): boolean {
             // A type is array-like if it is a reference to the global Array or global ReadonlyArray type,
             // or if it is not the undefined or null type and if it is assignable to ReadonlyArray<any>
-            return type.flags & TypeFlags.Reference && ((<TypeReference>type).target === globalArrayType || (<TypeReference>type).target === globalReadonlyArrayType) ||
+            return getObjectFlags(type) & ObjectFlags.Reference && ((<TypeReference>type).target === globalArrayType || (<TypeReference>type).target === globalReadonlyArrayType) ||
                 !(type.flags & TypeFlags.Nullable) && isTypeAssignableTo(type, anyReadonlyArrayType);
         }
 
@@ -7369,25 +9905,25 @@ namespace ts {
 
         function isLiteralType(type: Type): boolean {
             return type.flags & TypeFlags.Boolean ? true :
-                type.flags & TypeFlags.Union ? type.flags & TypeFlags.Enum ? true : !forEach((<UnionType>type).types, t => !isUnitType(t)) :
+                type.flags & TypeFlags.Union ? type.flags & TypeFlags.EnumLiteral ? true : !forEach((<UnionType>type).types, t => !isUnitType(t)) :
                 isUnitType(type);
         }
 
         function getBaseTypeOfLiteralType(type: Type): Type {
-            return type.flags & TypeFlags.StringLiteral ? stringType :
+            return type.flags & TypeFlags.EnumLiteral ? getBaseTypeOfEnumLiteralType(<LiteralType>type) :
+                type.flags & TypeFlags.StringLiteral ? stringType :
                 type.flags & TypeFlags.NumberLiteral ? numberType :
                 type.flags & TypeFlags.BooleanLiteral ? booleanType :
-                type.flags & TypeFlags.EnumLiteral ? (<EnumLiteralType>type).baseType :
-                type.flags & TypeFlags.Union && !(type.flags & TypeFlags.Enum) ? getUnionType(map((<UnionType>type).types, getBaseTypeOfLiteralType)) :
+                type.flags & TypeFlags.Union ? getUnionType(sameMap((<UnionType>type).types, getBaseTypeOfLiteralType)) :
                 type;
         }
 
         function getWidenedLiteralType(type: Type): Type {
-            return type.flags & TypeFlags.StringLiteral && type.flags & TypeFlags.FreshLiteral ? stringType :
+            return type.flags & TypeFlags.EnumLiteral ? getBaseTypeOfEnumLiteralType(<LiteralType>type) :
+                type.flags & TypeFlags.StringLiteral && type.flags & TypeFlags.FreshLiteral ? stringType :
                 type.flags & TypeFlags.NumberLiteral && type.flags & TypeFlags.FreshLiteral ? numberType :
                 type.flags & TypeFlags.BooleanLiteral ? booleanType :
-                type.flags & TypeFlags.EnumLiteral ? (<EnumLiteralType>type).baseType :
-                type.flags & TypeFlags.Union && !(type.flags & TypeFlags.Enum) ? getUnionType(map((<UnionType>type).types, getWidenedLiteralType)) :
+                type.flags & TypeFlags.Union ? getUnionType(sameMap((<UnionType>type).types, getWidenedLiteralType)) :
                 type;
         }
 
@@ -7396,7 +9932,7 @@ namespace ts {
          * Prefer using isTupleLikeType() unless the use of `elementTypes` is required.
          */
         function isTupleType(type: Type): boolean {
-            return !!(type.flags & TypeFlags.Reference && (<TypeReference>type).target.flags & TypeFlags.Tuple);
+            return !!(getObjectFlags(type) & ObjectFlags.Reference && (<TypeReference>type).target.objectFlags & ObjectFlags.Tuple);
         }
 
         function getFalsyFlagsOfTypes(types: Type[]): TypeFlags {
@@ -7412,32 +9948,40 @@ namespace ts {
         // no flags for all other types (including non-falsy literal types).
         function getFalsyFlags(type: Type): TypeFlags {
             return type.flags & TypeFlags.Union ? getFalsyFlagsOfTypes((<UnionType>type).types) :
-                type.flags & TypeFlags.StringLiteral ? (<LiteralType>type).text === "" ? TypeFlags.StringLiteral : 0 :
-                type.flags & TypeFlags.NumberLiteral ? (<LiteralType>type).text === "0" ? TypeFlags.NumberLiteral : 0 :
+                type.flags & TypeFlags.StringLiteral ? (<LiteralType>type).value === "" ? TypeFlags.StringLiteral : 0 :
+                type.flags & TypeFlags.NumberLiteral ? (<LiteralType>type).value === 0 ? TypeFlags.NumberLiteral : 0 :
                 type.flags & TypeFlags.BooleanLiteral ? type === falseType ? TypeFlags.BooleanLiteral : 0 :
                 type.flags & TypeFlags.PossiblyFalsy;
         }
 
-        function includeFalsyTypes(type: Type, flags: TypeFlags) {
-            if ((getFalsyFlags(type) & flags) === flags) {
-                return type;
-            }
-            const types = [type];
-            if (flags & TypeFlags.StringLike) types.push(emptyStringType);
-            if (flags & TypeFlags.NumberLike) types.push(zeroType);
-            if (flags & TypeFlags.BooleanLike) types.push(falseType);
-            if (flags & TypeFlags.Void) types.push(voidType);
-            if (flags & TypeFlags.Undefined) types.push(undefinedType);
-            if (flags & TypeFlags.Null) types.push(nullType);
-            return getUnionType(types, /*subtypeReduction*/ true);
-        }
-
         function removeDefinitelyFalsyTypes(type: Type): Type {
             return getFalsyFlags(type) & TypeFlags.DefinitelyFalsy ?
                 filterType(type, t => !(getFalsyFlags(t) & TypeFlags.DefinitelyFalsy)) :
                 type;
         }
 
+        function extractDefinitelyFalsyTypes(type: Type): Type {
+            return mapType(type, getDefinitelyFalsyPartOfType);
+        }
+
+        function getDefinitelyFalsyPartOfType(type: Type): Type {
+            return type.flags & TypeFlags.String ? emptyStringType :
+                type.flags & TypeFlags.Number ? zeroType :
+                type.flags & TypeFlags.Boolean || type === falseType ? falseType :
+                type.flags & (TypeFlags.Void | TypeFlags.Undefined | TypeFlags.Null) ||
+                type.flags & TypeFlags.StringLiteral && (<LiteralType>type).value === "" ||
+                type.flags & TypeFlags.NumberLiteral && (<LiteralType>type).value === 0 ? type :
+                neverType;
+        }
+
+        function getNullableType(type: Type, flags: TypeFlags): Type {
+            const missing = (flags & ~type.flags) & (TypeFlags.Undefined | TypeFlags.Null);
+            return missing === 0 ? type :
+                missing === TypeFlags.Undefined ? getUnionType([type, undefinedType]) :
+                missing === TypeFlags.Null ? getUnionType([type, nullType]) :
+                getUnionType([type, undefinedType, nullType]);
+        }
+
         function getNonNullableType(type: Type): Type {
             return strictNullChecks ? getTypeWithFacts(type, TypeFacts.NEUndefinedOrNull) : type;
         }
@@ -7452,8 +9996,8 @@ namespace ts {
                 getSignaturesOfType(type, SignatureKind.Construct).length === 0;
         }
 
-        function createTransientSymbol(source: Symbol, type: Type) {
-            const symbol = <TransientSymbol>createSymbol(source.flags | SymbolFlags.Transient, source.name);
+        function createSymbolWithType(source: Symbol, type: Type) {
+            const symbol = createSymbol(source.flags, source.name);
             symbol.declarations = source.declarations;
             symbol.parent = source.parent;
             symbol.type = type;
@@ -7469,8 +10013,8 @@ namespace ts {
             for (const property of getPropertiesOfObjectType(type)) {
                 const original = getTypeOfSymbol(property);
                 const updated = f(original);
-                members[property.name] = updated === original ? property : createTransientSymbol(property, updated);
-            };
+                members.set(property.name, updated === original ? property : createSymbolWithType(property, updated));
+            }
             return members;
         }
 
@@ -7480,7 +10024,7 @@ namespace ts {
          * Leave signatures alone since they are not subject to the check.
          */
         function getRegularTypeOfObjectLiteral(type: Type): Type {
-            if (!(type.flags & TypeFlags.ObjectLiteral && type.flags & TypeFlags.FreshLiteral)) {
+            if (!(getObjectFlags(type) & ObjectFlags.ObjectLiteral && type.flags & TypeFlags.FreshLiteral)) {
                 return type;
             }
             const regularType = (<FreshObjectLiteralType>type).regularType;
@@ -7497,15 +10041,24 @@ namespace ts {
                 resolved.stringIndexInfo,
                 resolved.numberIndexInfo);
             regularNew.flags = resolved.flags & ~TypeFlags.FreshLiteral;
+            regularNew.objectFlags |= ObjectFlags.ObjectLiteral;
             (<FreshObjectLiteralType>type).regularType = regularNew;
             return regularNew;
         }
 
+        function getWidenedProperty(prop: Symbol): Symbol {
+            const original = getTypeOfSymbol(prop);
+            const widened = getWidenedType(original);
+            return widened === original ? prop : createSymbolWithType(prop, widened);
+        }
+
         function getWidenedTypeOfObjectLiteral(type: Type): Type {
-            const members = transformTypeOfMembers(type, prop => {
-                const widened = getWidenedType(prop);
-                return prop === widened ? prop : widened;
-            });
+            const members = createMap<Symbol>();
+            for (const prop of getPropertiesOfObjectType(type)) {
+                // Since get accessors already widen their return value there is no need to
+                // widen accessor based properties here.
+                members.set(prop.name, prop.flags & SymbolFlags.Property ? getWidenedProperty(prop) : prop);
+            }
             const stringIndexInfo = getIndexInfoOfType(type, IndexKind.String);
             const numberIndexInfo = getIndexInfoOfType(type, IndexKind.Number);
             return createAnonymousType(type.symbol, members, emptyArray, emptyArray,
@@ -7522,14 +10075,14 @@ namespace ts {
                 if (type.flags & TypeFlags.Nullable) {
                     return anyType;
                 }
-                if (type.flags & TypeFlags.ObjectLiteral) {
+                if (getObjectFlags(type) & ObjectFlags.ObjectLiteral) {
                     return getWidenedTypeOfObjectLiteral(type);
                 }
                 if (type.flags & TypeFlags.Union) {
-                    return getUnionType(map((<UnionType>type).types, getWidenedConstituentType));
+                    return getUnionType(sameMap((<UnionType>type).types, getWidenedConstituentType));
                 }
                 if (isArrayType(type) || isTupleType(type)) {
-                    return createTypeReference((<TypeReference>type).target, map((<TypeReference>type).typeArguments, getWidenedType));
+                    return createTypeReference((<TypeReference>type).target, sameMap((<TypeReference>type).typeArguments, getWidenedType));
                 }
             }
             return type;
@@ -7562,7 +10115,7 @@ namespace ts {
                     }
                 }
             }
-            if (type.flags & TypeFlags.ObjectLiteral) {
+            if (getObjectFlags(type) & ObjectFlags.ObjectLiteral) {
                 for (const p of getPropertiesOfObjectType(type)) {
                     const t = getTypeOfSymbol(p);
                     if (t.flags & TypeFlags.ContainsWideningType) {
@@ -7599,7 +10152,7 @@ namespace ts {
                 case SyntaxKind.SetAccessor:
                 case SyntaxKind.FunctionExpression:
                 case SyntaxKind.ArrowFunction:
-                    if (!declaration.name) {
+                    if (!(declaration as NamedDeclaration).name) {
                         error(declaration, Diagnostics.Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type, typeAsString);
                         return;
                     }
@@ -7608,11 +10161,11 @@ namespace ts {
                 default:
                     diagnostic = Diagnostics.Variable_0_implicitly_has_an_1_type;
             }
-            error(declaration, diagnostic, declarationNameToString(declaration.name), typeAsString);
+            error(declaration, diagnostic, declarationNameToString(getNameOfDeclaration(declaration)), typeAsString);
         }
 
         function reportErrorsFromWidening(declaration: Declaration, type: Type) {
-            if (produceDiagnostics && compilerOptions.noImplicitAny && type.flags & TypeFlags.ContainsWideningType) {
+            if (produceDiagnostics && noImplicitAny && type.flags & TypeFlags.ContainsWideningType) {
                 // Report implicit any error within type if possible, otherwise report error on declaration
                 if (!reportWideningErrorsInType(type)) {
                     reportImplicitAnyError(declaration, type);
@@ -7641,69 +10194,135 @@ namespace ts {
             }
         }
 
-        function createInferenceContext(signature: Signature, inferUnionTypes: boolean): InferenceContext {
-            const inferences = map(signature.typeParameters, createTypeInferencesObject);
+        function createInferenceContext(signature: Signature, flags: InferenceFlags, baseInferences?: InferenceInfo[]): InferenceContext {
+            const inferences = baseInferences ? map(baseInferences, cloneInferenceInfo) : map(signature.typeParameters, createInferenceInfo);
+            const context = mapper as InferenceContext;
+            context.mappedTypes = signature.typeParameters;
+            context.signature = signature;
+            context.inferences = inferences;
+            context.flags = flags;
+            return context;
+
+            function mapper(t: Type): Type {
+                for (let i = 0; i < inferences.length; i++) {
+                    if (t === inferences[i].typeParameter) {
+                        inferences[i].isFixed = true;
+                        return getInferredType(context, i);
+                    }
+                }
+                return t;
+            }
+        }
+
+        function createInferenceInfo(typeParameter: TypeParameter): InferenceInfo {
             return {
-                signature,
-                inferUnionTypes,
-                inferences,
-                inferredTypes: new Array(signature.typeParameters.length),
+                typeParameter,
+                candidates: undefined,
+                inferredType: undefined,
+                priority: undefined,
+                topLevel: true,
+                isFixed: false
             };
         }
 
-        function createTypeInferencesObject(): TypeInferences {
+        function cloneInferenceInfo(inference: InferenceInfo): InferenceInfo {
             return {
-                primary: undefined,
-                secondary: undefined,
-                topLevel: true,
-                isFixed: false,
+                typeParameter: inference.typeParameter,
+                candidates: inference.candidates && inference.candidates.slice(),
+                inferredType: inference.inferredType,
+                priority: inference.priority,
+                topLevel: inference.topLevel,
+                isFixed: inference.isFixed
             };
         }
 
         // Return true if the given type could possibly reference a type parameter for which
         // we perform type inference (i.e. a type parameter of a generic function). We cache
         // results for union and intersection types for performance reasons.
-        function couldContainTypeParameters(type: Type): boolean {
-            return !!(type.flags & TypeFlags.TypeParameter ||
-                type.flags & TypeFlags.Reference && forEach((<TypeReference>type).typeArguments, couldContainTypeParameters) ||
-                type.flags & TypeFlags.Anonymous && type.symbol && type.symbol.flags & (SymbolFlags.Method | SymbolFlags.TypeLiteral | SymbolFlags.Class) ||
-                type.flags & TypeFlags.UnionOrIntersection && couldUnionOrIntersectionContainTypeParameters(<UnionOrIntersectionType>type));
+        function couldContainTypeVariables(type: Type): boolean {
+            const objectFlags = getObjectFlags(type);
+            return !!(type.flags & TypeFlags.TypeVariable ||
+                objectFlags & ObjectFlags.Reference && forEach((<TypeReference>type).typeArguments, couldContainTypeVariables) ||
+                objectFlags & ObjectFlags.Anonymous && type.symbol && type.symbol.flags & (SymbolFlags.Function | SymbolFlags.Method | SymbolFlags.TypeLiteral | SymbolFlags.Class) ||
+                objectFlags & ObjectFlags.Mapped ||
+                type.flags & TypeFlags.UnionOrIntersection && couldUnionOrIntersectionContainTypeVariables(<UnionOrIntersectionType>type));
         }
 
-        function couldUnionOrIntersectionContainTypeParameters(type: UnionOrIntersectionType): boolean {
-            if (type.couldContainTypeParameters === undefined) {
-                type.couldContainTypeParameters = forEach(type.types, couldContainTypeParameters);
+        function couldUnionOrIntersectionContainTypeVariables(type: UnionOrIntersectionType): boolean {
+            if (type.couldContainTypeVariables === undefined) {
+                type.couldContainTypeVariables = forEach(type.types, couldContainTypeVariables);
             }
-            return type.couldContainTypeParameters;
+            return type.couldContainTypeVariables;
         }
 
         function isTypeParameterAtTopLevel(type: Type, typeParameter: TypeParameter): boolean {
             return type === typeParameter || type.flags & TypeFlags.UnionOrIntersection && forEach((<UnionOrIntersectionType>type).types, t => isTypeParameterAtTopLevel(t, typeParameter));
         }
 
-        function inferTypes(context: InferenceContext, originalSource: Type, originalTarget: Type) {
-            const typeParameters = context.signature.typeParameters;
-            let sourceStack: Type[];
-            let targetStack: Type[];
-            let depth = 0;
-            let inferiority = 0;
-            const visited = createMap<boolean>();
-            inferFromTypes(originalSource, originalTarget);
-
-            function isInProcess(source: Type, target: Type) {
-                for (let i = 0; i < depth; i++) {
-                    if (source === sourceStack[i] && target === targetStack[i]) {
-                        return true;
-                    }
+        // Infer a suitable input type for a homomorphic mapped type { [P in keyof T]: X }. We construct
+        // an object type with the same set of properties as the source type, where the type of each
+        // property is computed by inferring from the source property type to X for the type
+        // variable T[P] (i.e. we treat the type T[P] as the type variable we're inferring for).
+        function inferTypeForHomomorphicMappedType(source: Type, target: MappedType): Type {
+            const properties = getPropertiesOfType(source);
+            let indexInfo = getIndexInfoOfType(source, IndexKind.String);
+            if (properties.length === 0 && !indexInfo) {
+                return undefined;
+            }
+            const typeParameter = <TypeParameter>getIndexedAccessType((<IndexType>getConstraintTypeFromMappedType(target)).type, getTypeParameterFromMappedType(target));
+            const inference = createInferenceInfo(typeParameter);
+            const inferences = [inference];
+            const templateType = getTemplateTypeFromMappedType(target);
+            const readonlyMask = target.declaration.readonlyToken ? false : true;
+            const optionalMask = target.declaration.questionToken ? 0 : SymbolFlags.Optional;
+            const members = createMap<Symbol>();
+            for (const prop of properties) {
+                const inferredPropType = inferTargetType(getTypeOfSymbol(prop));
+                if (!inferredPropType) {
+                    return undefined;
                 }
-                return false;
+                const inferredProp = createSymbol(SymbolFlags.Property | prop.flags & optionalMask, prop.name);
+                inferredProp.checkFlags = readonlyMask && isReadonlySymbol(prop) ? CheckFlags.Readonly : 0;
+                inferredProp.declarations = prop.declarations;
+                inferredProp.type = inferredPropType;
+                members.set(prop.name, inferredProp);
+            }
+            if (indexInfo) {
+                const inferredIndexType = inferTargetType(indexInfo.type);
+                if (!inferredIndexType) {
+                    return undefined;
+                }
+                indexInfo = createIndexInfo(inferredIndexType, readonlyMask && indexInfo.isReadonly);
+            }
+            return createAnonymousType(undefined, members, emptyArray, emptyArray, indexInfo, undefined);
+
+            function inferTargetType(sourceType: Type): Type {
+                inference.candidates = undefined;
+                inferTypes(inferences, sourceType, templateType);
+                return inference.candidates && getUnionType(inference.candidates, /*subtypeReduction*/ true);
             }
+        }
+
+        function inferTypes(inferences: InferenceInfo[], originalSource: Type, originalTarget: Type, priority: InferencePriority = 0) {
+            let symbolStack: Symbol[];
+            let visited: Map<boolean>;
+            inferFromTypes(originalSource, originalTarget);
 
             function inferFromTypes(source: Type, target: Type) {
-                if (!couldContainTypeParameters(target)) {
+                if (!couldContainTypeVariables(target)) {
+                    return;
+                }
+                if (source.aliasSymbol && source.aliasTypeArguments && source.aliasSymbol === target.aliasSymbol) {
+                    // Source and target are types originating in the same generic type alias declaration.
+                    // Simply infer from source type arguments to target type arguments.
+                    const sourceTypes = source.aliasTypeArguments;
+                    const targetTypes = target.aliasTypeArguments;
+                    for (let i = 0; i < sourceTypes.length; i++) {
+                        inferFromTypes(sourceTypes[i], targetTypes[i]);
+                    }
                     return;
                 }
-                if (source.flags & TypeFlags.Union && target.flags & TypeFlags.Union && !(source.flags & TypeFlags.Enum && target.flags & TypeFlags.Enum) ||
+                if (source.flags & TypeFlags.Union && target.flags & TypeFlags.Union && !(source.flags & TypeFlags.EnumLiteral && target.flags & TypeFlags.EnumLiteral) ||
                     source.flags & TypeFlags.Intersection && target.flags & TypeFlags.Intersection) {
                     // Source and target are both unions or both intersections. If source and target
                     // are the same type, just relate each constituent type to itself.
@@ -7740,41 +10359,35 @@ namespace ts {
                         target = removeTypesFromUnionOrIntersection(<UnionOrIntersectionType>target, matchingTypes);
                     }
                 }
-                if (target.flags & TypeFlags.TypeParameter) {
+                if (target.flags & TypeFlags.TypeVariable) {
                     // If target is a type parameter, make an inference, unless the source type contains
                     // the anyFunctionType (the wildcard type that's used to avoid contextually typing functions).
                     // Because the anyFunctionType is internal, it should not be exposed to the user by adding
                     // it as an inference candidate. Hopefully, a better candidate will come along that does
                     // not contain anyFunctionType when we come back to this argument for its second round
-                    // of inference.
-                    if (source.flags & TypeFlags.ContainsAnyFunctionType) {
+                    // of inference. Also, we exclude inferences for silentNeverType which is used as a wildcard
+                    // when constructing types from type parameters that had no inference candidates.
+                    if (source.flags & TypeFlags.ContainsAnyFunctionType || source === silentNeverType) {
                         return;
                     }
-                    for (let i = 0; i < typeParameters.length; i++) {
-                        if (target === typeParameters[i]) {
-                            const inferences = context.inferences[i];
-                            if (!inferences.isFixed) {
-                                // Any inferences that are made to a type parameter in a union type are inferior
-                                // to inferences made to a flat (non-union) type. This is because if we infer to
-                                // T | string[], we really don't know if we should be inferring to T or not (because
-                                // the correct constituent on the target side could be string[]). Therefore, we put
-                                // such inferior inferences into a secondary bucket, and only use them if the primary
-                                // bucket is empty.
-                                const candidates = inferiority ?
-                                    inferences.secondary || (inferences.secondary = []) :
-                                    inferences.primary || (inferences.primary = []);
-                                if (!contains(candidates, source)) {
-                                    candidates.push(source);
-                                }
-                                if (!isTypeParameterAtTopLevel(originalTarget, <TypeParameter>target)) {
-                                    inferences.topLevel = false;
-                                }
+                    const inference = getInferenceInfoForType(target);
+                    if (inference) {
+                        if (!inference.isFixed) {
+                            if (!inference.candidates || priority < inference.priority) {
+                                inference.candidates = [source];
+                                inference.priority = priority;
+                            }
+                            else if (priority === inference.priority) {
+                                inference.candidates.push(source);
+                            }
+                            if (!(priority & InferencePriority.ReturnType) && target.flags & TypeFlags.TypeParameter && !isTypeParameterAtTopLevel(originalTarget, <TypeParameter>target)) {
+                                inference.topLevel = false;
                             }
-                            return;
                         }
+                        return;
                     }
                 }
-                else if (source.flags & TypeFlags.Reference && target.flags & TypeFlags.Reference && (<TypeReference>source).target === (<TypeReference>target).target) {
+                else if (getObjectFlags(source) & ObjectFlags.Reference && getObjectFlags(target) & ObjectFlags.Reference && (<TypeReference>source).target === (<TypeReference>target).target) {
                     // If source and target are references to the same generic type, infer from type arguments
                     const sourceTypes = (<TypeReference>source).typeArguments || emptyArray;
                     const targetTypes = (<TypeReference>target).typeArguments || emptyArray;
@@ -7785,25 +10398,26 @@ namespace ts {
                 }
                 else if (target.flags & TypeFlags.UnionOrIntersection) {
                     const targetTypes = (<UnionOrIntersectionType>target).types;
-                    let typeParameterCount = 0;
-                    let typeParameter: TypeParameter;
-                    // First infer to each type in union or intersection that isn't a type parameter
+                    let typeVariableCount = 0;
+                    let typeVariable: TypeVariable;
+                    // First infer to each type in union or intersection that isn't a type variable
                     for (const t of targetTypes) {
-                        if (t.flags & TypeFlags.TypeParameter && contains(typeParameters, t)) {
-                            typeParameter = <TypeParameter>t;
-                            typeParameterCount++;
+                        if (getInferenceInfoForType(t)) {
+                            typeVariable = <TypeVariable>t;
+                            typeVariableCount++;
                         }
                         else {
                             inferFromTypes(source, t);
                         }
                     }
-                    // Next, if target containings a single naked type parameter, make a secondary inference to that type
-                    // parameter. This gives meaningful results for union types in co-variant positions and intersection
+                    // Next, if target containings a single naked type variable, make a secondary inference to that type
+                    // variable. This gives meaningful results for union types in co-variant positions and intersection
                     // types in contra-variant positions (such as callback parameters).
-                    if (typeParameterCount === 1) {
-                        inferiority++;
-                        inferFromTypes(source, typeParameter);
-                        inferiority--;
+                    if (typeVariableCount === 1) {
+                        const savePriority = priority;
+                        priority |= InferencePriority.NakedTypeVariable;
+                        inferFromTypes(source, typeVariable);
+                        priority = savePriority;
                     }
                 }
                 else if (source.flags & TypeFlags.UnionOrIntersection) {
@@ -7815,32 +10429,77 @@ namespace ts {
                 }
                 else {
                     source = getApparentType(source);
-                    if (source.flags & TypeFlags.ObjectType) {
-                        if (isInProcess(source, target)) {
+                    if (source.flags & TypeFlags.Object) {
+                        const key = source.id + "," + target.id;
+                        if (visited && visited.get(key)) {
                             return;
                         }
-                        if (isDeeplyNestedGeneric(source, sourceStack, depth) && isDeeplyNestedGeneric(target, targetStack, depth)) {
-                            return;
+                        (visited || (visited = createMap<boolean>())).set(key, true);
+                        // If we are already processing another target type with the same associated symbol (such as
+                        // an instantiation of the same generic type), we do not explore this target as it would yield
+                        // no further inferences. We exclude the static side of classes from this check since it shares
+                        // its symbol with the instance side which would lead to false positives.
+                        const isNonConstructorObject = target.flags & TypeFlags.Object &&
+                            !(getObjectFlags(target) & ObjectFlags.Anonymous && target.symbol && target.symbol.flags & SymbolFlags.Class);
+                        const symbol = isNonConstructorObject ? target.symbol : undefined;
+                        if (symbol) {
+                            if (contains(symbolStack, symbol)) {
+                                return;
+                            }
+                            (symbolStack || (symbolStack = [])).push(symbol);
+                            inferFromObjectTypes(source, target);
+                            symbolStack.pop();
                         }
-                        const key = source.id + "," + target.id;
-                        if (visited[key]) {
-                            return;
+                        else {
+                            inferFromObjectTypes(source, target);
+                        }
+                    }
+                }
+            }
+
+            function getInferenceInfoForType(type: Type) {
+                if (type.flags & TypeFlags.TypeVariable) {
+                    for (const inference of inferences) {
+                        if (type === inference.typeParameter) {
+                            return inference;
                         }
-                        visited[key] = true;
-                        if (depth === 0) {
-                            sourceStack = [];
-                            targetStack = [];
+                    }
+                }
+                return undefined;
+            }
+
+            function inferFromObjectTypes(source: Type, target: Type) {
+                if (getObjectFlags(target) & ObjectFlags.Mapped) {
+                    const constraintType = getConstraintTypeFromMappedType(<MappedType>target);
+                    if (constraintType.flags & TypeFlags.Index) {
+                        // We're inferring from some source type S to a homomorphic mapped type { [P in keyof T]: X },
+                        // where T is a type variable. Use inferTypeForHomomorphicMappedType to infer a suitable source
+                        // type and then make a secondary inference from that type to T. We make a secondary inference
+                        // such that direct inferences to T get priority over inferences to Partial<T>, for example.
+                        const inference = getInferenceInfoForType((<IndexType>constraintType).type);
+                        if (inference && !inference.isFixed) {
+                            const inferredType = inferTypeForHomomorphicMappedType(source, <MappedType>target);
+                            if (inferredType) {
+                                const savePriority = priority;
+                                priority |= InferencePriority.MappedType;
+                                inferFromTypes(inferredType, inference.typeParameter);
+                                priority = savePriority;
+                            }
                         }
-                        sourceStack[depth] = source;
-                        targetStack[depth] = target;
-                        depth++;
-                        inferFromProperties(source, target);
-                        inferFromSignatures(source, target, SignatureKind.Call);
-                        inferFromSignatures(source, target, SignatureKind.Construct);
-                        inferFromIndexTypes(source, target);
-                        depth--;
+                        return;
+                    }
+                    if (constraintType.flags & TypeFlags.TypeParameter) {
+                        // We're inferring from some source type S to a mapped type { [P in T]: X }, where T is a type
+                        // parameter. Infer from 'keyof S' to T and infer from a union of each property type in S to X.
+                        inferFromTypes(getIndexType(source), constraintType);
+                        inferFromTypes(getUnionType(map(getPropertiesOfType(source), getTypeOfSymbol)), getTemplateTypeFromMappedType(<MappedType>target));
+                        return;
                     }
                 }
+                inferFromProperties(source, target);
+                inferFromSignatures(source, target, SignatureKind.Call);
+                inferFromSignatures(source, target, SignatureKind.Construct);
+                inferFromIndexTypes(source, target);
             }
 
             function inferFromProperties(source: Type, target: Type) {
@@ -7923,71 +10582,73 @@ namespace ts {
             return type.flags & TypeFlags.Union ? getUnionType(reducedTypes) : getIntersectionType(reducedTypes);
         }
 
-        function getInferenceCandidates(context: InferenceContext, index: number): Type[] {
-            const inferences = context.inferences[index];
-            return inferences.primary || inferences.secondary || emptyArray;
-        }
-
         function hasPrimitiveConstraint(type: TypeParameter): boolean {
             const constraint = getConstraintOfTypeParameter(type);
-            return constraint && maybeTypeOfKind(constraint, TypeFlags.Primitive);
+            return constraint && maybeTypeOfKind(constraint, TypeFlags.Primitive | TypeFlags.Index);
         }
 
         function getInferredType(context: InferenceContext, index: number): Type {
-            let inferredType = context.inferredTypes[index];
-            let inferenceSucceeded: boolean;
+            const inference = context.inferences[index];
+            let inferredType = inference.inferredType;
             if (!inferredType) {
-                const inferences = getInferenceCandidates(context, index);
-                if (inferences.length) {
+                if (inference.candidates) {
                     // We widen inferred literal types if
                     // all inferences were made to top-level ocurrences of the type parameter, and
                     // the type parameter has no constraint or its constraint includes no primitive or literal types, and
                     // the type parameter was fixed during inference or does not occur at top-level in the return type.
                     const signature = context.signature;
-                    const widenLiteralTypes = context.inferences[index].topLevel &&
-                        !hasPrimitiveConstraint(signature.typeParameters[index]) &&
-                        (context.inferences[index].isFixed || !isTypeParameterAtTopLevel(getReturnTypeOfSignature(signature), signature.typeParameters[index]));
-                    const baseInferences = widenLiteralTypes ? map(inferences, getWidenedLiteralType) : inferences;
-                    // Infer widened union or supertype, or the unknown type for no common supertype
-                    const unionOrSuperType = context.inferUnionTypes ? getUnionType(baseInferences, /*subtypeReduction*/ true) : getCommonSupertype(baseInferences);
-                    inferredType = unionOrSuperType ? getWidenedType(unionOrSuperType) : unknownType;
-                    inferenceSucceeded = !!unionOrSuperType;
+                    const widenLiteralTypes = inference.topLevel &&
+                        !hasPrimitiveConstraint(inference.typeParameter) &&
+                        (inference.isFixed || !isTypeParameterAtTopLevel(getReturnTypeOfSignature(signature), inference.typeParameter));
+                    const baseCandidates = widenLiteralTypes ? sameMap(inference.candidates, getWidenedLiteralType) : inference.candidates;
+                    // Infer widened union or supertype, or the unknown type for no common supertype. We infer union types
+                    // for inferences coming from return types in order to avoid common supertype failures.
+                    const unionOrSuperType = context.flags & InferenceFlags.InferUnionTypes || inference.priority & InferencePriority.ReturnType ?
+                        getUnionType(baseCandidates, /*subtypeReduction*/ true) : getCommonSupertype(baseCandidates);
+                    inferredType = getWidenedType(unionOrSuperType);
+                }
+                else if (context.flags & InferenceFlags.NoDefault) {
+                    // We use silentNeverType as the wildcard that signals no inferences.
+                    inferredType = silentNeverType;
                 }
                 else {
-                    // Infer the empty object type when no inferences were made. It is important to remember that
-                    // in this case, inference still succeeds, meaning there is no error for not having inference
-                    // candidates. An inference error only occurs when there are *conflicting* candidates, i.e.
+                    // Infer either the default or the empty object type when no inferences were
+                    // made. It is important to remember that in this case, inference still
+                    // succeeds, meaning there is no error for not having inference candidates. An
+                    // inference error only occurs when there are *conflicting* candidates, i.e.
                     // candidates with no common supertype.
-                    inferredType = emptyObjectType;
-                    inferenceSucceeded = true;
+                    const defaultType = getDefaultFromTypeParameter(inference.typeParameter);
+                    if (defaultType) {
+                        // Instantiate the default type. Any forward reference to a type
+                        // parameter should be instantiated to the empty object type.
+                        inferredType = instantiateType(defaultType,
+                            combineTypeMappers(
+                                createBackreferenceMapper(context.signature.typeParameters, index),
+                                context));
+                    }
+                    else {
+                        inferredType = context.flags & InferenceFlags.AnyDefault ? anyType : emptyObjectType;
+                    }
                 }
-                context.inferredTypes[index] = inferredType;
+                inference.inferredType = inferredType;
 
-                // Only do the constraint check if inference succeeded (to prevent cascading errors)
-                if (inferenceSucceeded) {
-                    const constraint = getConstraintOfTypeParameter(context.signature.typeParameters[index]);
-                    if (constraint) {
-                        const instantiatedConstraint = instantiateType(constraint, getInferenceMapper(context));
-                        if (!isTypeAssignableTo(inferredType, getTypeWithThisArgument(instantiatedConstraint, inferredType))) {
-                            context.inferredTypes[index] = inferredType = instantiatedConstraint;
-                        }
+                const constraint = getConstraintOfTypeParameter(context.signature.typeParameters[index]);
+                if (constraint) {
+                    const instantiatedConstraint = instantiateType(constraint, context);
+                    if (!isTypeAssignableTo(inferredType, getTypeWithThisArgument(instantiatedConstraint, inferredType))) {
+                        inference.inferredType = inferredType = instantiatedConstraint;
                     }
                 }
-                else if (context.failedTypeParameterIndex === undefined || context.failedTypeParameterIndex > index) {
-                    // If inference failed, it is necessary to record the index of the failed type parameter (the one we are on).
-                    // It might be that inference has already failed on a later type parameter on a previous call to inferTypeArguments.
-                    // So if this failure is on preceding type parameter, this type parameter is the new failure index.
-                    context.failedTypeParameterIndex = index;
-                }
             }
             return inferredType;
         }
 
         function getInferredTypes(context: InferenceContext): Type[] {
-            for (let i = 0; i < context.inferredTypes.length; i++) {
-                getInferredType(context, i);
+            const result: Type[] = [];
+            for (let i = 0; i < context.inferences.length; i++) {
+                result.push(getInferredType(context, i));
             }
-            return context.inferredTypes;
+            return result;
         }
 
         // EXPRESSION TYPE CHECKING
@@ -7995,7 +10656,7 @@ namespace ts {
         function getResolvedSymbol(node: Identifier): Symbol {
             const links = getNodeLinks(node);
             if (!links.resolvedSymbol) {
-                links.resolvedSymbol = !nodeIsMissing(node) && resolveName(node, node.text, SymbolFlags.Value | SymbolFlags.ExportValue, Diagnostics.Cannot_find_name_0, node) || unknownSymbol;
+                links.resolvedSymbol = !nodeIsMissing(node) && resolveName(node, node.text, SymbolFlags.Value | SymbolFlags.ExportValue, Diagnostics.Cannot_find_name_0, node, Diagnostics.Cannot_find_name_0_Did_you_mean_1) || unknownSymbol;
             }
             return links.resolvedSymbol;
         }
@@ -8004,29 +10665,21 @@ namespace ts {
             // TypeScript 1.0 spec (April 2014): 3.6.3
             // A type query consists of the keyword typeof followed by an expression.
             // The expression is restricted to a single identifier or a sequence of identifiers separated by periods
-            while (node) {
-                switch (node.kind) {
-                    case SyntaxKind.TypeQuery:
-                        return true;
-                    case SyntaxKind.Identifier:
-                    case SyntaxKind.QualifiedName:
-                        node = node.parent;
-                        continue;
-                    default:
-                        return false;
-                }
-            }
-            Debug.fail("should not get here");
+            return !!findAncestor(
+                node,
+                n => n.kind === SyntaxKind.TypeQuery ? true : n.kind === SyntaxKind.Identifier || n.kind === SyntaxKind.QualifiedName ? false : "quit");
         }
 
         // Return the flow cache key for a "dotted name" (i.e. a sequence of identifiers
         // separated by dots). The key consists of the id of the symbol referenced by the
         // leftmost identifier followed by zero or more property names separated by dots.
-        // The result is undefined if the reference isn't a dotted name.
+        // The result is undefined if the reference isn't a dotted name. We prefix nodes
+        // occurring in an apparent type position with '@' because the control flow type
+        // of such nodes may be based on the apparent type instead of the declared type.
         function getFlowCacheKey(node: Node): string {
             if (node.kind === SyntaxKind.Identifier) {
                 const symbol = getResolvedSymbol(<Identifier>node);
-                return symbol !== unknownSymbol ? "" + getSymbolId(symbol) : undefined;
+                return symbol !== unknownSymbol ? (isApparentTypePosition(node) ? "@" : "") + getSymbolId(symbol) : undefined;
             }
             if (node.kind === SyntaxKind.ThisKeyword) {
                 return "0";
@@ -8057,6 +10710,8 @@ namespace ts {
                         getExportSymbolOfValueSymbolIfExported(getResolvedSymbol(<Identifier>source)) === getSymbolOfNode(target);
                 case SyntaxKind.ThisKeyword:
                     return target.kind === SyntaxKind.ThisKeyword;
+                case SyntaxKind.SuperKeyword:
+                    return target.kind === SyntaxKind.SuperKeyword;
                 case SyntaxKind.PropertyAccessExpression:
                     return target.kind === SyntaxKind.PropertyAccessExpression &&
                         (<PropertyAccessExpression>source).name.text === (<PropertyAccessExpression>target).name.text &&
@@ -8099,9 +10754,9 @@ namespace ts {
         function isDiscriminantProperty(type: Type, name: string) {
             if (type && type.flags & TypeFlags.Union) {
                 const prop = getUnionOrIntersectionProperty(<UnionType>type, name);
-                if (prop && prop.flags & SymbolFlags.SyntheticProperty) {
+                if (prop && getCheckFlags(prop) & CheckFlags.SyntheticProperty) {
                     if ((<TransientSymbol>prop).isDiscriminantProperty === undefined) {
-                        (<TransientSymbol>prop).isDiscriminantProperty = (<TransientSymbol>prop).hasNonUniformType && isLiteralType(getTypeOfSymbol(prop));
+                        (<TransientSymbol>prop).isDiscriminantProperty = (<TransientSymbol>prop).checkFlags & CheckFlags.HasNonUniformType && isLiteralType(getTypeOfSymbol(prop));
                     }
                     return (<TransientSymbol>prop).isDiscriminantProperty;
                 }
@@ -8177,7 +10832,7 @@ namespace ts {
             // check. This gives us a quicker out in the common case where an object type is not a function.
             const resolved = resolveStructuredTypeMembers(type);
             return !!(resolved.callSignatures.length || resolved.constructSignatures.length ||
-                resolved.members["bind"] && isTypeSubtypeOf(type, globalFunctionType));
+                resolved.members.get("bind") && isTypeSubtypeOf(type, globalFunctionType));
         }
 
         function getTypeFacts(type: Type): TypeFacts {
@@ -8186,15 +10841,16 @@ namespace ts {
                 return strictNullChecks ? TypeFacts.StringStrictFacts : TypeFacts.StringFacts;
             }
             if (flags & TypeFlags.StringLiteral) {
+                const isEmpty = (<LiteralType>type).value === "";
                 return strictNullChecks ?
-                    (<LiteralType>type).text === "" ? TypeFacts.EmptyStringStrictFacts : TypeFacts.NonEmptyStringStrictFacts :
-                    (<LiteralType>type).text === "" ? TypeFacts.EmptyStringFacts : TypeFacts.NonEmptyStringFacts;
+                    isEmpty ? TypeFacts.EmptyStringStrictFacts : TypeFacts.NonEmptyStringStrictFacts :
+                    isEmpty ? TypeFacts.EmptyStringFacts : TypeFacts.NonEmptyStringFacts;
             }
             if (flags & (TypeFlags.Number | TypeFlags.Enum)) {
                 return strictNullChecks ? TypeFacts.NumberStrictFacts : TypeFacts.NumberFacts;
             }
-            if (flags & (TypeFlags.NumberLiteral | TypeFlags.EnumLiteral)) {
-                const isZero = (<LiteralType>type).text === "0";
+            if (flags & TypeFlags.NumberLiteral) {
+                const isZero = (<LiteralType>type).value === 0;
                 return strictNullChecks ?
                     isZero ? TypeFacts.ZeroStrictFacts : TypeFacts.NonZeroStrictFacts :
                     isZero ? TypeFacts.ZeroFacts : TypeFacts.NonZeroFacts;
@@ -8207,7 +10863,7 @@ namespace ts {
                     type === falseType ? TypeFacts.FalseStrictFacts : TypeFacts.TrueStrictFacts :
                     type === falseType ? TypeFacts.FalseFacts : TypeFacts.TrueFacts;
             }
-            if (flags & TypeFlags.ObjectType) {
+            if (flags & TypeFlags.Object) {
                 return isFunctionObjectType(<ObjectType>type) ?
                     strictNullChecks ? TypeFacts.FunctionStrictFacts : TypeFacts.FunctionFacts :
                     strictNullChecks ? TypeFacts.ObjectStrictFacts : TypeFacts.ObjectFacts;
@@ -8221,9 +10877,11 @@ namespace ts {
             if (flags & TypeFlags.ESSymbol) {
                 return strictNullChecks ? TypeFacts.SymbolStrictFacts : TypeFacts.SymbolFacts;
             }
-            if (flags & TypeFlags.TypeParameter) {
-                const constraint = getConstraintOfTypeParameter(<TypeParameter>type);
-                return getTypeFacts(constraint || emptyObjectType);
+            if (flags & TypeFlags.NonPrimitive) {
+                return strictNullChecks ? TypeFacts.ObjectStrictFacts : TypeFacts.ObjectFacts;
+            }
+            if (flags & TypeFlags.TypeVariable) {
+                return getTypeFacts(getBaseConstraintOfType(type) || emptyObjectType);
             }
             if (flags & TypeFlags.UnionOrIntersection) {
                 return getTypeFactsOfTypes((<UnionOrIntersectionType>type).types);
@@ -8237,13 +10895,13 @@ namespace ts {
 
         function getTypeWithDefault(type: Type, defaultExpression: Expression) {
             if (defaultExpression) {
-                const defaultType = checkExpression(defaultExpression);
+                const defaultType = getTypeOfExpression(defaultExpression);
                 return getUnionType([getTypeWithFacts(type, TypeFacts.NEUndefined), defaultType]);
             }
             return type;
         }
 
-        function getTypeOfDestructuredProperty(type: Type, name: Identifier | LiteralExpression | ComputedPropertyName) {
+        function getTypeOfDestructuredProperty(type: Type, name: PropertyName) {
             const text = getTextOfPropertyName(name);
             return getTypeOfPropertyOfType(type, text) ||
                 isNumericLiteralName(text) && getIndexTypeOfType(type, IndexKind.Number) ||
@@ -8253,26 +10911,34 @@ namespace ts {
 
         function getTypeOfDestructuredArrayElement(type: Type, index: number) {
             return isTupleLikeType(type) && getTypeOfPropertyOfType(type, "" + index) ||
-                checkIteratedTypeOrElementType(type, /*errorNode*/ undefined, /*allowStringInput*/ false) ||
+                checkIteratedTypeOrElementType(type, /*errorNode*/ undefined, /*allowStringInput*/ false, /*allowAsyncIterables*/ false) ||
                 unknownType;
         }
 
-        function getTypeOfDestructuredSpreadElement(type: Type) {
-            return createArrayType(checkIteratedTypeOrElementType(type, /*errorNode*/ undefined, /*allowStringInput*/ false) || unknownType);
+        function getTypeOfDestructuredSpreadExpression(type: Type) {
+            return createArrayType(checkIteratedTypeOrElementType(type, /*errorNode*/ undefined, /*allowStringInput*/ false, /*allowAsyncIterables*/ false) || unknownType);
         }
 
         function getAssignedTypeOfBinaryExpression(node: BinaryExpression): Type {
-            return node.parent.kind === SyntaxKind.ArrayLiteralExpression || node.parent.kind === SyntaxKind.PropertyAssignment ?
+            const isDestructuringDefaultAssignment =
+                node.parent.kind === SyntaxKind.ArrayLiteralExpression && isDestructuringAssignmentTarget(node.parent) ||
+                node.parent.kind === SyntaxKind.PropertyAssignment && isDestructuringAssignmentTarget(node.parent.parent);
+            return isDestructuringDefaultAssignment ?
                 getTypeWithDefault(getAssignedType(node), node.right) :
-                checkExpression(node.right);
+                getTypeOfExpression(node.right);
+        }
+
+        function isDestructuringAssignmentTarget(parent: Node) {
+            return parent.parent.kind === SyntaxKind.BinaryExpression && (parent.parent as BinaryExpression).left === parent ||
+                parent.parent.kind === SyntaxKind.ForOfStatement && (parent.parent as ForOfStatement).initializer === parent;
         }
 
         function getAssignedTypeOfArrayLiteralElement(node: ArrayLiteralExpression, element: Expression): Type {
             return getTypeOfDestructuredArrayElement(getAssignedType(node), indexOf(node.elements, element));
         }
 
-        function getAssignedTypeOfSpreadElement(node: SpreadElementExpression): Type {
-            return getTypeOfDestructuredSpreadElement(getAssignedType(<ArrayLiteralExpression>node.parent));
+        function getAssignedTypeOfSpreadExpression(node: SpreadElement): Type {
+            return getTypeOfDestructuredSpreadExpression(getAssignedType(<ArrayLiteralExpression>node.parent));
         }
 
         function getAssignedTypeOfPropertyAssignment(node: PropertyAssignment | ShorthandPropertyAssignment): Type {
@@ -8289,15 +10955,15 @@ namespace ts {
                 case SyntaxKind.ForInStatement:
                     return stringType;
                 case SyntaxKind.ForOfStatement:
-                    return checkRightHandSideOfForOf((<ForOfStatement>parent).expression) || unknownType;
+                    return checkRightHandSideOfForOf((<ForOfStatement>parent).expression, (<ForOfStatement>parent).awaitModifier) || unknownType;
                 case SyntaxKind.BinaryExpression:
                     return getAssignedTypeOfBinaryExpression(<BinaryExpression>parent);
                 case SyntaxKind.DeleteExpression:
                     return undefinedType;
                 case SyntaxKind.ArrayLiteralExpression:
                     return getAssignedTypeOfArrayLiteralElement(<ArrayLiteralExpression>parent, node);
-                case SyntaxKind.SpreadElementExpression:
-                    return getAssignedTypeOfSpreadElement(<SpreadElementExpression>parent);
+                case SyntaxKind.SpreadElement:
+                    return getAssignedTypeOfSpreadExpression(<SpreadElement>parent);
                 case SyntaxKind.PropertyAssignment:
                     return getAssignedTypeOfPropertyAssignment(<PropertyAssignment>parent);
                 case SyntaxKind.ShorthandPropertyAssignment:
@@ -8313,7 +10979,7 @@ namespace ts {
                 getTypeOfDestructuredProperty(parentType, node.propertyName || <Identifier>node.name) :
                 !node.dotDotDotToken ?
                     getTypeOfDestructuredArrayElement(parentType, indexOf(pattern.elements, node)) :
-                    getTypeOfDestructuredSpreadElement(parentType);
+                    getTypeOfDestructuredSpreadExpression(parentType);
             return getTypeWithDefault(type, node.initializer);
         }
 
@@ -8322,7 +10988,7 @@ namespace ts {
             // from its initializer, we'll already have cached the type. Otherwise we compute it now
             // without caching such that transient types are reflected.
             const links = getNodeLinks(node);
-            return links.resolvedType || checkExpression(node);
+            return links.resolvedType || getTypeOfExpression(node);
         }
 
         function getInitialTypeOfVariableDeclaration(node: VariableDeclaration) {
@@ -8333,7 +10999,7 @@ namespace ts {
                 return stringType;
             }
             if (node.parent.parent.kind === SyntaxKind.ForOfStatement) {
-                return checkRightHandSideOfForOf((<ForOfStatement>node.parent.parent).expression) || unknownType;
+                return checkRightHandSideOfForOf((<ForOfStatement>node.parent.parent).expression, (<ForOfStatement>node.parent.parent).awaitModifier) || unknownType;
             }
             return unknownType;
         }
@@ -8350,6 +11016,13 @@ namespace ts {
                 getAssignedType(<Expression>node);
         }
 
+        function isEmptyArrayAssignment(node: VariableDeclaration | BindingElement | Expression) {
+            return node.kind === SyntaxKind.VariableDeclaration && (<VariableDeclaration>node).initializer &&
+                isEmptyArrayLiteral((<VariableDeclaration>node).initializer) ||
+                node.kind !== SyntaxKind.BindingElement && node.parent.kind === SyntaxKind.BinaryExpression &&
+                isEmptyArrayLiteral((<BinaryExpression>node.parent).right);
+        }
+
         function getReferenceCandidate(node: Expression): Expression {
             switch (node.kind) {
                 case SyntaxKind.ParenthesizedExpression:
@@ -8365,9 +11038,17 @@ namespace ts {
             return node;
         }
 
+        function getReferenceRoot(node: Node): Node {
+            const parent = node.parent;
+            return parent.kind === SyntaxKind.ParenthesizedExpression ||
+                parent.kind === SyntaxKind.BinaryExpression && (<BinaryExpression>parent).operatorToken.kind === SyntaxKind.EqualsToken && (<BinaryExpression>parent).left === node ||
+                parent.kind === SyntaxKind.BinaryExpression && (<BinaryExpression>parent).operatorToken.kind === SyntaxKind.CommaToken && (<BinaryExpression>parent).right === node ?
+                getReferenceRoot(parent) : node;
+        }
+
         function getTypeOfSwitchClause(clause: CaseClause | DefaultClause) {
             if (clause.kind === SyntaxKind.CaseClause) {
-                const caseType = getRegularTypeOfLiteralType(checkExpression((<CaseClause>clause).expression));
+                const caseType = getRegularTypeOfLiteralType(getTypeOfExpression((<CaseClause>clause).expression));
                 return isUnitType(caseType) ? caseType : undefined;
             }
             return neverType;
@@ -8399,48 +11080,206 @@ namespace ts {
                         return false;
                     }
                 }
-                return true;
-            }
-            if (source.flags & TypeFlags.EnumLiteral && target.flags & TypeFlags.Enum && (<EnumLiteralType>source).baseType === target) {
-                return true;
+                return true;
+            }
+            if (source.flags & TypeFlags.EnumLiteral && getBaseTypeOfEnumLiteralType(<LiteralType>source) === target) {
+                return true;
+            }
+            return containsType(target.types, source);
+        }
+
+        function forEachType<T>(type: Type, f: (t: Type) => T): T {
+            return type.flags & TypeFlags.Union ? forEach((<UnionType>type).types, f) : f(type);
+        }
+
+        function filterType(type: Type, f: (t: Type) => boolean): Type {
+            if (type.flags & TypeFlags.Union) {
+                const types = (<UnionType>type).types;
+                const filtered = filter(types, f);
+                return filtered === types ? type : getUnionTypeFromSortedList(filtered);
+            }
+            return f(type) ? type : neverType;
+        }
+
+        // Apply a mapping function to a type and return the resulting type. If the source type
+        // is a union type, the mapping function is applied to each constituent type and a union
+        // of the resulting types is returned.
+        function mapType(type: Type, mapper: (t: Type) => Type): Type {
+            if (!(type.flags & TypeFlags.Union)) {
+                return mapper(type);
+            }
+            const types = (<UnionType>type).types;
+            let mappedType: Type;
+            let mappedTypes: Type[];
+            for (const current of types) {
+                const t = mapper(current);
+                if (t) {
+                    if (!mappedType) {
+                        mappedType = t;
+                    }
+                    else if (!mappedTypes) {
+                        mappedTypes = [mappedType, t];
+                    }
+                    else {
+                        mappedTypes.push(t);
+                    }
+                }
+            }
+            return mappedTypes ? getUnionType(mappedTypes) : mappedType;
+        }
+
+        function extractTypesOfKind(type: Type, kind: TypeFlags) {
+            return filterType(type, t => (t.flags & kind) !== 0);
+        }
+
+        // Return a new type in which occurrences of the string and number primitive types in
+        // typeWithPrimitives have been replaced with occurrences of string literals and numeric
+        // literals in typeWithLiterals, respectively.
+        function replacePrimitivesWithLiterals(typeWithPrimitives: Type, typeWithLiterals: Type) {
+            if (isTypeSubsetOf(stringType, typeWithPrimitives) && maybeTypeOfKind(typeWithLiterals, TypeFlags.StringLiteral) ||
+                isTypeSubsetOf(numberType, typeWithPrimitives) && maybeTypeOfKind(typeWithLiterals, TypeFlags.NumberLiteral)) {
+                return mapType(typeWithPrimitives, t =>
+                    t.flags & TypeFlags.String ? extractTypesOfKind(typeWithLiterals, TypeFlags.String | TypeFlags.StringLiteral) :
+                        t.flags & TypeFlags.Number ? extractTypesOfKind(typeWithLiterals, TypeFlags.Number | TypeFlags.NumberLiteral) :
+                            t);
+            }
+            return typeWithPrimitives;
+        }
+
+        function isIncomplete(flowType: FlowType) {
+            return flowType.flags === 0;
+        }
+
+        function getTypeFromFlowType(flowType: FlowType) {
+            return flowType.flags === 0 ? (<IncompleteType>flowType).type : <Type>flowType;
+        }
+
+        function createFlowType(type: Type, incomplete: boolean): FlowType {
+            return incomplete ? { flags: 0, type } : type;
+        }
+
+        // An evolving array type tracks the element types that have so far been seen in an
+        // 'x.push(value)' or 'x[n] = value' operation along the control flow graph. Evolving
+        // array types are ultimately converted into manifest array types (using getFinalArrayType)
+        // and never escape the getFlowTypeOfReference function.
+        function createEvolvingArrayType(elementType: Type): EvolvingArrayType {
+            const result = <EvolvingArrayType>createObjectType(ObjectFlags.EvolvingArray);
+            result.elementType = elementType;
+            return result;
+        }
+
+        function getEvolvingArrayType(elementType: Type): EvolvingArrayType {
+            return evolvingArrayTypes[elementType.id] || (evolvingArrayTypes[elementType.id] = createEvolvingArrayType(elementType));
+        }
+
+        // When adding evolving array element types we do not perform subtype reduction. Instead,
+        // we defer subtype reduction until the evolving array type is finalized into a manifest
+        // array type.
+        function addEvolvingArrayElementType(evolvingArrayType: EvolvingArrayType, node: Expression): EvolvingArrayType {
+            const elementType = getBaseTypeOfLiteralType(getContextFreeTypeOfExpression(node));
+            return isTypeSubsetOf(elementType, evolvingArrayType.elementType) ? evolvingArrayType : getEvolvingArrayType(getUnionType([evolvingArrayType.elementType, elementType]));
+        }
+
+        function createFinalArrayType(elementType: Type) {
+            return elementType.flags & TypeFlags.Never ?
+                autoArrayType :
+                createArrayType(elementType.flags & TypeFlags.Union ?
+                    getUnionType((<UnionType>elementType).types, /*subtypeReduction*/ true) :
+                    elementType);
+        }
+
+        // We perform subtype reduction upon obtaining the final array type from an evolving array type.
+        function getFinalArrayType(evolvingArrayType: EvolvingArrayType): Type {
+            return evolvingArrayType.finalArrayType || (evolvingArrayType.finalArrayType = createFinalArrayType(evolvingArrayType.elementType));
+        }
+
+        function finalizeEvolvingArrayType(type: Type): Type {
+            return getObjectFlags(type) & ObjectFlags.EvolvingArray ? getFinalArrayType(<EvolvingArrayType>type) : type;
+        }
+
+        function getElementTypeOfEvolvingArrayType(type: Type) {
+            return getObjectFlags(type) & ObjectFlags.EvolvingArray ? (<EvolvingArrayType>type).elementType : neverType;
+        }
+
+        function isEvolvingArrayTypeList(types: Type[]) {
+            let hasEvolvingArrayType = false;
+            for (const t of types) {
+                if (!(t.flags & TypeFlags.Never)) {
+                    if (!(getObjectFlags(t) & ObjectFlags.EvolvingArray)) {
+                        return false;
+                    }
+                    hasEvolvingArrayType = true;
+                }
             }
-            return containsType(target.types, source);
+            return hasEvolvingArrayType;
         }
 
-        function filterType(type: Type, f: (t: Type) => boolean): Type {
-            if (type.flags & TypeFlags.Union) {
-                const types = (<UnionType>type).types;
-                const filtered = filter(types, f);
-                return filtered === types ? type : getUnionTypeFromSortedList(filtered);
-            }
-            return f(type) ? type : neverType;
+        // At flow control branch or loop junctions, if the type along every antecedent code path
+        // is an evolving array type, we construct a combined evolving array type. Otherwise we
+        // finalize all evolving array types.
+        function getUnionOrEvolvingArrayType(types: Type[], subtypeReduction: boolean) {
+            return isEvolvingArrayTypeList(types) ?
+                getEvolvingArrayType(getUnionType(map(types, getElementTypeOfEvolvingArrayType))) :
+                getUnionType(sameMap(types, finalizeEvolvingArrayType), subtypeReduction);
         }
 
-        function isIncomplete(flowType: FlowType) {
-            return flowType.flags === 0;
+        // Return true if the given node is 'x' in an 'x.length', x.push(value)', 'x.unshift(value)' or
+        // 'x[n] = value' operation, where 'n' is an expression of type any, undefined, or a number-like type.
+        function isEvolvingArrayOperationTarget(node: Node) {
+            const root = getReferenceRoot(node);
+            const parent = root.parent;
+            const isLengthPushOrUnshift = parent.kind === SyntaxKind.PropertyAccessExpression && (
+                (<PropertyAccessExpression>parent).name.text === "length" ||
+                parent.parent.kind === SyntaxKind.CallExpression && isPushOrUnshiftIdentifier((<PropertyAccessExpression>parent).name));
+            const isElementAssignment = parent.kind === SyntaxKind.ElementAccessExpression &&
+                (<ElementAccessExpression>parent).expression === root &&
+                parent.parent.kind === SyntaxKind.BinaryExpression &&
+                (<BinaryExpression>parent.parent).operatorToken.kind === SyntaxKind.EqualsToken &&
+                (<BinaryExpression>parent.parent).left === parent &&
+                !isAssignmentTarget(parent.parent) &&
+                isTypeAnyOrAllConstituentTypesHaveKind(getTypeOfExpression((<ElementAccessExpression>parent).argumentExpression), TypeFlags.NumberLike | TypeFlags.Undefined);
+            return isLengthPushOrUnshift || isElementAssignment;
         }
 
-        function getTypeFromFlowType(flowType: FlowType) {
-            return flowType.flags === 0 ? (<IncompleteType>flowType).type : <Type>flowType;
+        function maybeTypePredicateCall(node: CallExpression) {
+            const links = getNodeLinks(node);
+            if (links.maybeTypePredicate === undefined) {
+                links.maybeTypePredicate = getMaybeTypePredicate(node);
+            }
+            return links.maybeTypePredicate;
         }
 
-        function createFlowType(type: Type, incomplete: boolean): FlowType {
-            return incomplete ? { flags: 0, type } : type;
+        function getMaybeTypePredicate(node: CallExpression) {
+            if (node.expression.kind !== SyntaxKind.SuperKeyword) {
+                const funcType = checkNonNullExpression(node.expression);
+                if (funcType !== silentNeverType) {
+                    const apparentType = getApparentType(funcType);
+                    if (apparentType !== unknownType) {
+                        const callSignatures = getSignaturesOfType(apparentType, SignatureKind.Call);
+                        return !!forEach(callSignatures, sig => sig.typePredicate);
+                    }
+                }
+            }
+            return false;
         }
 
-        function getFlowTypeOfReference(reference: Node, declaredType: Type, assumeInitialized: boolean, flowContainer: Node) {
+        function getFlowTypeOfReference(reference: Node, declaredType: Type, initialType = declaredType, flowContainer?: Node, couldBeUninitialized?: boolean) {
             let key: string;
-            if (!reference.flowNode || assumeInitialized && !(declaredType.flags & TypeFlags.Narrowable)) {
+            if (!reference.flowNode || !couldBeUninitialized && !(declaredType.flags & TypeFlags.Narrowable)) {
                 return declaredType;
             }
-            const initialType = assumeInitialized ? declaredType : includeFalsyTypes(declaredType, TypeFlags.Undefined);
             const visitedFlowStart = visitedFlowCount;
-            const result = getTypeFromFlowType(getTypeAtFlowNode(reference.flowNode));
+            const evolvedType = getTypeFromFlowType(getTypeAtFlowNode(reference.flowNode));
             visitedFlowCount = visitedFlowStart;
-            if (reference.parent.kind === SyntaxKind.NonNullExpression && getTypeWithFacts(result, TypeFacts.NEUndefinedOrNull).flags & TypeFlags.Never) {
+            // When the reference is 'x' in an 'x.length', 'x.push(value)', 'x.unshift(value)' or x[n] = value' operation,
+            // we give type 'any[]' to 'x' instead of using the type determined by control flow analysis such that operations
+            // on empty arrays are possible without implicit any errors and new element types can be inferred without
+            // type mismatch errors.
+            const resultType = getObjectFlags(evolvedType) & ObjectFlags.EvolvingArray && isEvolvingArrayOperationTarget(reference) ? anyArrayType : finalizeEvolvingArrayType(evolvedType);
+            if (reference.parent.kind === SyntaxKind.NonNullExpression && getTypeWithFacts(resultType, TypeFacts.NEUndefinedOrNull).flags & TypeFlags.Never) {
                 return declaredType;
             }
-            return result;
+            return resultType;
 
             function getTypeAtFlowNode(flow: FlowNode): FlowType {
                 while (true) {
@@ -8455,7 +11294,19 @@ namespace ts {
                         }
                     }
                     let type: FlowType;
-                    if (flow.flags & FlowFlags.Assignment) {
+                    if (flow.flags & FlowFlags.AfterFinally) {
+                        // block flow edge: finally -> pre-try (for larger explanation check comment in binder.ts - bindTryStatement
+                        (<AfterFinallyFlow>flow).locked = true;
+                        type = getTypeAtFlowNode((<AfterFinallyFlow>flow).antecedent);
+                        (<AfterFinallyFlow>flow).locked = false;
+                    }
+                    else if (flow.flags & FlowFlags.PreFinally) {
+                        // locked pre-finally flows are filtered out in getTypeAtFlowBranchLabel
+                        // so here just redirect to antecedent
+                        flow = (<PreFinallyFlow>flow).antecedent;
+                        continue;
+                    }
+                    else if (flow.flags & FlowFlags.Assignment) {
                         type = getTypeAtFlowAssignment(<FlowAssignment>flow);
                         if (!type) {
                             flow = (<FlowAssignment>flow).antecedent;
@@ -8477,10 +11328,17 @@ namespace ts {
                             getTypeAtFlowBranchLabel(<FlowLabel>flow) :
                             getTypeAtFlowLoopLabel(<FlowLabel>flow);
                     }
+                    else if (flow.flags & FlowFlags.ArrayMutation) {
+                        type = getTypeAtFlowArrayMutation(<FlowArrayMutation>flow);
+                        if (!type) {
+                            flow = (<FlowArrayMutation>flow).antecedent;
+                            continue;
+                        }
+                    }
                     else if (flow.flags & FlowFlags.Start) {
                         // Check if we should continue with the control flow of the containing function.
                         const container = (<FlowStart>flow).container;
-                        if (container && container !== flowContainer && reference.kind !== SyntaxKind.PropertyAccessExpression) {
+                        if (container && container !== flowContainer && reference.kind !== SyntaxKind.PropertyAccessExpression && reference.kind !== SyntaxKind.ThisKeyword) {
                             flow = container.flowNode;
                             continue;
                         }
@@ -8489,8 +11347,8 @@ namespace ts {
                     }
                     else {
                         // Unreachable code errors are reported in the binding phase. Here we
-                        // simply return the declared type to reduce follow-on errors.
-                        type = declaredType;
+                        // simply return the non-auto declared type to reduce follow-on errors.
+                        type = convertAutoToAny(declaredType);
                     }
                     if (flow.flags & FlowFlags.Shared) {
                         // Record visited node and the associated type in the cache.
@@ -8507,10 +11365,21 @@ namespace ts {
                 // Assignments only narrow the computed type if the declared type is a union type. Thus, we
                 // only need to evaluate the assigned type if the declared type is a union type.
                 if (isMatchingReference(reference, node)) {
-                    const isIncrementOrDecrement = node.parent.kind === SyntaxKind.PrefixUnaryExpression || node.parent.kind === SyntaxKind.PostfixUnaryExpression;
-                    return declaredType.flags & TypeFlags.Union && !isIncrementOrDecrement ?
-                        getAssignmentReducedType(<UnionType>declaredType, getInitialOrAssignedType(node)) :
-                        declaredType;
+                    if (getAssignmentTargetKind(node) === AssignmentKind.Compound) {
+                        const flowType = getTypeAtFlowNode(flow.antecedent);
+                        return createFlowType(getBaseTypeOfLiteralType(getTypeFromFlowType(flowType)), isIncomplete(flowType));
+                    }
+                    if (declaredType === autoType || declaredType === autoArrayType) {
+                        if (isEmptyArrayAssignment(node)) {
+                            return getEvolvingArrayType(neverType);
+                        }
+                        const assignedType = getBaseTypeOfLiteralType(getInitialOrAssignedType(node));
+                        return isTypeAssignableTo(assignedType, declaredType) ? assignedType : anyArrayType;
+                    }
+                    if (declaredType.flags & TypeFlags.Union) {
+                        return getAssignmentReducedType(<UnionType>declaredType, getInitialOrAssignedType(node));
+                    }
+                    return declaredType;
                 }
                 // We didn't have a direct match. However, if the reference is a dotted name, this
                 // may be an assignment to a left hand part of the reference. For example, for a
@@ -8523,24 +11392,56 @@ namespace ts {
                 return undefined;
             }
 
-            function getTypeAtFlowCondition(flow: FlowCondition): FlowType {
-                const flowType = getTypeAtFlowNode(flow.antecedent);
-                let type = getTypeFromFlowType(flowType);
-                if (!(type.flags & TypeFlags.Never)) {
-                    // If we have an antecedent type (meaning we're reachable in some way), we first
-                    // attempt to narrow the antecedent type. If that produces the never type, and if
-                    // the antecedent type is incomplete (i.e. a transient type in a loop), then we
-                    // take the type guard as an indication that control *could* reach here once we
-                    // have the complete type. We proceed by switching to the silent never type which
-                    // doesn't report errors when operators are applied to it. Note that this is the
-                    // *only* place a silent never type is ever generated.
-                    const assumeTrue = (flow.flags & FlowFlags.TrueCondition) !== 0;
-                    type = narrowType(type, flow.expression, assumeTrue);
-                    if (type.flags & TypeFlags.Never && isIncomplete(flowType)) {
-                        type = silentNeverType;
+            function getTypeAtFlowArrayMutation(flow: FlowArrayMutation): FlowType {
+                const node = flow.node;
+                const expr = node.kind === SyntaxKind.CallExpression ?
+                    (<PropertyAccessExpression>(<CallExpression>node).expression).expression :
+                    (<ElementAccessExpression>(<BinaryExpression>node).left).expression;
+                if (isMatchingReference(reference, getReferenceCandidate(expr))) {
+                    const flowType = getTypeAtFlowNode(flow.antecedent);
+                    const type = getTypeFromFlowType(flowType);
+                    if (getObjectFlags(type) & ObjectFlags.EvolvingArray) {
+                        let evolvedType = <EvolvingArrayType>type;
+                        if (node.kind === SyntaxKind.CallExpression) {
+                            for (const arg of (<CallExpression>node).arguments) {
+                                evolvedType = addEvolvingArrayElementType(evolvedType, arg);
+                            }
+                        }
+                        else {
+                            const indexType = getTypeOfExpression((<ElementAccessExpression>(<BinaryExpression>node).left).argumentExpression);
+                            if (isTypeAnyOrAllConstituentTypesHaveKind(indexType, TypeFlags.NumberLike | TypeFlags.Undefined)) {
+                                evolvedType = addEvolvingArrayElementType(evolvedType, (<BinaryExpression>node).right);
+                            }
+                        }
+                        return evolvedType === type ? flowType : createFlowType(evolvedType, isIncomplete(flowType));
                     }
+                    return flowType;
                 }
-                return createFlowType(type, isIncomplete(flowType));
+                return undefined;
+            }
+
+            function getTypeAtFlowCondition(flow: FlowCondition): FlowType {
+                const flowType = getTypeAtFlowNode(flow.antecedent);
+                const type = getTypeFromFlowType(flowType);
+                if (type.flags & TypeFlags.Never) {
+                    return flowType;
+                }
+                // If we have an antecedent type (meaning we're reachable in some way), we first
+                // attempt to narrow the antecedent type. If that produces the never type, and if
+                // the antecedent type is incomplete (i.e. a transient type in a loop), then we
+                // take the type guard as an indication that control *could* reach here once we
+                // have the complete type. We proceed by switching to the silent never type which
+                // doesn't report errors when operators are applied to it. Note that this is the
+                // *only* place a silent never type is ever generated.
+                const assumeTrue = (flow.flags & FlowFlags.TrueCondition) !== 0;
+                const nonEvolvingType = finalizeEvolvingArrayType(type);
+                const narrowedType = narrowType(nonEvolvingType, flow.expression, assumeTrue);
+                if (narrowedType === nonEvolvingType) {
+                    return flowType;
+                }
+                const incomplete = isIncomplete(flowType);
+                const resultType = incomplete && narrowedType.flags & TypeFlags.Never ? silentNeverType : narrowedType;
+                return createFlowType(resultType, incomplete);
             }
 
             function getTypeAtSwitchClause(flow: FlowSwitchClause): FlowType {
@@ -8561,6 +11462,12 @@ namespace ts {
                 let subtypeReduction = false;
                 let seenIncomplete = false;
                 for (const antecedent of flow.antecedents) {
+                    if (antecedent.flags & FlowFlags.PreFinally && (<PreFinallyFlow>antecedent).lock.locked) {
+                        // if flow correspond to branch from pre-try to finally and this branch is locked - this means that
+                        // we initially have started following the flow outside the finally block.
+                        // in this case we should ignore this branch.
+                        continue;
+                    }
                     const flowType = getTypeAtFlowNode(antecedent);
                     const type = getTypeFromFlowType(flowType);
                     // If the type at a particular antecedent path is the declared type and the
@@ -8583,7 +11490,7 @@ namespace ts {
                         seenIncomplete = true;
                     }
                 }
-                return createFlowType(getUnionType(antecedentTypes, subtypeReduction), seenIncomplete);
+                return createFlowType(getUnionOrEvolvingArrayType(antecedentTypes, subtypeReduction), seenIncomplete);
             }
 
             function getTypeAtFlowLoopLabel(flow: FlowLabel): FlowType {
@@ -8594,16 +11501,21 @@ namespace ts {
                 if (!key) {
                     key = getFlowCacheKey(reference);
                 }
-                if (cache[key]) {
-                    return cache[key];
+                const cached = cache.get(key);
+                if (cached) {
+                    return cached;
                 }
                 // If this flow loop junction and reference are already being processed, return
                 // the union of the types computed for each branch so far, marked as incomplete.
-                // We should never see an empty array here because the first antecedent of a loop
-                // junction is always the non-looping control flow path that leads to the top.
+                // It is possible to see an empty array in cases where loops are nested and the
+                // back edge of the outer loop reaches an inner loop that is already being analyzed.
+                // In such cases we restart the analysis of the inner loop, which will then see
+                // a non-empty in-process array for the outer loop and eventually terminate because
+                // the first antecedent of a loop junction is always the non-looping control flow
+                // path that leads to the top.
                 for (let i = flowLoopStart; i < flowLoopCount; i++) {
-                    if (flowLoopNodes[i] === flow && flowLoopKeys[i] === key) {
-                        return createFlowType(getUnionType(flowLoopTypes[i]), /*incomplete*/ true);
+                    if (flowLoopNodes[i] === flow && flowLoopKeys[i] === key && flowLoopTypes[i].length) {
+                        return createFlowType(getUnionOrEvolvingArrayType(flowLoopTypes[i], /*subtypeReduction*/ false), /*incomplete*/ true);
                     }
                 }
                 // Add the flow loop junction and reference to the in-process stack and analyze
@@ -8625,8 +11537,9 @@ namespace ts {
                     // If we see a value appear in the cache it is a sign that control flow  analysis
                     // was restarted and completed by checkExpressionCached. We can simply pick up
                     // the resulting type and bail out.
-                    if (cache[key]) {
-                        return cache[key];
+                    const cached = cache.get(key);
+                    if (cached) {
+                        return cached;
                     }
                     if (!contains(antecedentTypes, type)) {
                         antecedentTypes.push(type);
@@ -8646,11 +11559,12 @@ namespace ts {
                 }
                 // The result is incomplete if the first antecedent (the non-looping control flow path)
                 // is incomplete.
-                const result = getUnionType(antecedentTypes, subtypeReduction);
+                const result = getUnionOrEvolvingArrayType(antecedentTypes, subtypeReduction);
                 if (isIncomplete(firstAntecedentType)) {
                     return createFlowType(result, /*incomplete*/ true);
                 }
-                return cache[key] = result;
+                cache.set(key, result);
+                return result;
             }
 
             function isMatchingReferenceDiscriminant(expr: Expression) {
@@ -8728,7 +11642,7 @@ namespace ts {
                 if (operator === SyntaxKind.ExclamationEqualsToken || operator === SyntaxKind.ExclamationEqualsEqualsToken) {
                     assumeTrue = !assumeTrue;
                 }
-                const valueType = checkExpression(value);
+                const valueType = getTypeOfExpression(value);
                 if (valueType.flags & TypeFlags.Nullable) {
                     if (!strictNullChecks) {
                         return type;
@@ -8746,7 +11660,7 @@ namespace ts {
                 }
                 if (assumeTrue) {
                     const narrowedType = filterType(type, t => areTypesComparable(t, valueType));
-                    return narrowedType.flags & TypeFlags.Never ? type : narrowedType;
+                    return narrowedType.flags & TypeFlags.Never ? type : replacePrimitivesWithLiterals(narrowedType, valueType);
                 }
                 if (isUnitType(valueType)) {
                     const regularType = getRegularTypeOfLiteralType(valueType);
@@ -8773,14 +11687,22 @@ namespace ts {
                     // We narrow a non-union type to an exact primitive type if the non-union type
                     // is a supertype of that primitive type. For example, type 'any' can be narrowed
                     // to one of the primitive types.
-                    const targetType = typeofTypesByName[literal.text];
-                    if (targetType && isTypeSubtypeOf(targetType, type)) {
-                        return targetType;
+                    const targetType = typeofTypesByName.get(literal.text);
+                    if (targetType) {
+                        if (isTypeSubtypeOf(targetType, type)) {
+                            return targetType;
+                        }
+                        if (type.flags & TypeFlags.TypeVariable) {
+                            const constraint = getBaseConstraintOfType(type) || anyType;
+                            if (isTypeSubtypeOf(targetType, constraint)) {
+                                return getIntersectionType([type, targetType]);
+                            }
+                        }
                     }
                 }
                 const facts = assumeTrue ?
-                    typeofEQFacts[literal.text] || TypeFacts.TypeofEQHostObject :
-                    typeofNEFacts[literal.text] || TypeFacts.TypeofNEHostObject;
+                    typeofEQFacts.get(literal.text) || TypeFacts.TypeofEQHostObject :
+                    typeofNEFacts.get(literal.text) || TypeFacts.TypeofNEHostObject;
                 return getTypeWithFacts(type, facts);
             }
 
@@ -8793,7 +11715,9 @@ namespace ts {
                 const clauseTypes = switchTypes.slice(clauseStart, clauseEnd);
                 const hasDefaultClause = clauseStart === clauseEnd || contains(clauseTypes, neverType);
                 const discriminantType = getUnionType(clauseTypes);
-                const caseType = discriminantType.flags & TypeFlags.Never ? neverType : filterType(type, t => isTypeComparableTo(discriminantType, t));
+                const caseType =
+                    discriminantType.flags & TypeFlags.Never ? neverType :
+                        replacePrimitivesWithLiterals(filterType(type, t => isTypeComparableTo(discriminantType, t)), discriminantType);
                 if (!hasDefaultClause) {
                     return caseType;
                 }
@@ -8813,7 +11737,7 @@ namespace ts {
                 }
 
                 // Check that right operand is a function type with a prototype property
-                const rightType = checkExpression(expr.right);
+                const rightType = getTypeOfExpression(expr.right);
                 if (!isTypeSubtypeOf(rightType, globalFunctionType)) {
                     return type;
                 }
@@ -8836,10 +11760,10 @@ namespace ts {
                 if (!targetType) {
                     // Target type is type of construct signature
                     let constructSignatures: Signature[];
-                    if (rightType.flags & TypeFlags.Interface) {
+                    if (getObjectFlags(rightType) & ObjectFlags.Interface) {
                         constructSignatures = resolveDeclaredMembers(<InterfaceType>rightType).declaredConstructSignatures;
                     }
-                    else if (rightType.flags & TypeFlags.Anonymous) {
+                    else if (getObjectFlags(rightType) & ObjectFlags.Anonymous) {
                         constructSignatures = getSignaturesOfType(rightType, SignatureKind.Construct);
                     }
                     if (constructSignatures && constructSignatures.length) {
@@ -8848,20 +11772,20 @@ namespace ts {
                 }
 
                 if (targetType) {
-                    return getNarrowedType(type, targetType, assumeTrue);
+                    return getNarrowedType(type, targetType, assumeTrue, isTypeInstanceOf);
                 }
 
                 return type;
             }
 
-            function getNarrowedType(type: Type, candidate: Type, assumeTrue: boolean) {
+            function getNarrowedType(type: Type, candidate: Type, assumeTrue: boolean, isRelated: (source: Type, target: Type) => boolean) {
                 if (!assumeTrue) {
-                    return filterType(type, t => !isTypeInstanceOf(t, candidate));
+                    return filterType(type, t => !isRelated(t, candidate));
                 }
                 // If the current type is a union type, remove all constituents that couldn't be instances of
                 // the candidate type. If one or more constituents remain, return a union of those.
                 if (type.flags & TypeFlags.Union) {
-                    const assignableType = filterType(type, t => isTypeInstanceOf(t, candidate));
+                    const assignableType = filterType(type, t => isRelated(t, candidate));
                     if (!(assignableType.flags & TypeFlags.Never)) {
                         return assignableType;
                     }
@@ -8871,15 +11795,14 @@ namespace ts {
                 // Otherwise, if the candidate type is assignable to the target type, narrow to the candidate
                 // type. Otherwise, the types are completely unrelated, so narrow to an intersection of the
                 // two types.
-                const targetType = type.flags & TypeFlags.TypeParameter ? getApparentType(type) : type;
                 return isTypeSubtypeOf(candidate, type) ? candidate :
                     isTypeAssignableTo(type, candidate) ? type :
-                    isTypeAssignableTo(candidate, targetType) ? candidate :
-                    getIntersectionType([type, candidate]);
+                        isTypeAssignableTo(candidate, type) ? candidate :
+                            getIntersectionType([type, candidate]);
             }
 
             function narrowTypeByTypePredicate(type: Type, callExpression: CallExpression, assumeTrue: boolean): Type {
-                if (!hasMatchingArgument(callExpression, reference)) {
+                if (!hasMatchingArgument(callExpression, reference) || !maybeTypePredicateCall(callExpression)) {
                     return type;
                 }
                 const signature = getResolvedSignature(callExpression);
@@ -8894,10 +11817,10 @@ namespace ts {
                 }
 
                 if (isIdentifierTypePredicate(predicate)) {
-                    const predicateArgument = callExpression.arguments[predicate.parameterIndex];
+                    const predicateArgument = callExpression.arguments[predicate.parameterIndex - (signature.thisParameter ? 1 : 0)];
                     if (predicateArgument) {
                         if (isMatchingReference(reference, predicateArgument)) {
-                            return getNarrowedType(type, predicate.type, assumeTrue);
+                            return getNarrowedType(type, predicate.type, assumeTrue, isTypeSubtypeOf);
                         }
                         if (containsMatchingReference(reference, predicateArgument)) {
                             return declaredType;
@@ -8905,12 +11828,12 @@ namespace ts {
                     }
                 }
                 else {
-                    const invokedExpression = skipParenthesizedNodes(callExpression.expression);
+                    const invokedExpression = skipParentheses(callExpression.expression);
                     if (invokedExpression.kind === SyntaxKind.ElementAccessExpression || invokedExpression.kind === SyntaxKind.PropertyAccessExpression) {
                         const accessExpression = invokedExpression as ElementAccessExpression | PropertyAccessExpression;
-                        const possibleReference = skipParenthesizedNodes(accessExpression.expression);
+                        const possibleReference = skipParentheses(accessExpression.expression);
                         if (isMatchingReference(reference, possibleReference)) {
-                            return getNarrowedType(type, predicate.type, assumeTrue);
+                            return getNarrowedType(type, predicate.type, assumeTrue, isTypeSubtypeOf);
                         }
                         if (containsMatchingReference(reference, possibleReference)) {
                             return declaredType;
@@ -8926,6 +11849,7 @@ namespace ts {
                 switch (expr.kind) {
                     case SyntaxKind.Identifier:
                     case SyntaxKind.ThisKeyword:
+                    case SyntaxKind.SuperKeyword:
                     case SyntaxKind.PropertyAccessExpression:
                         return narrowTypeByTruthiness(type, expr, assumeTrue);
                     case SyntaxKind.CallExpression:
@@ -8953,8 +11877,8 @@ namespace ts {
                 if (isRightSideOfQualifiedNameOrPropertyAccess(location)) {
                     location = location.parent;
                 }
-                if (isExpression(location) && !isAssignmentTarget(location)) {
-                    const type = checkExpression(<Expression>location);
+                if (isPartOfExpression(location) && !isAssignmentTarget(location)) {
+                    const type = getTypeOfExpression(<Expression>location);
                     if (getExportSymbolOfValueSymbolIfExported(getNodeLinks(location).resolvedSymbol) === symbol) {
                         return type;
                     }
@@ -8968,23 +11892,12 @@ namespace ts {
             return getTypeOfSymbol(symbol);
         }
 
-        function skipParenthesizedNodes(expression: Expression): Expression {
-            while (expression.kind === SyntaxKind.ParenthesizedExpression) {
-                expression = (expression as ParenthesizedExpression).expression;
-            }
-            return expression;
-        }
-
         function getControlFlowContainer(node: Node): Node {
-            while (true) {
-                node = node.parent;
-                if (isFunctionLike(node) && !getImmediatelyInvokedFunctionExpression(node) ||
-                    node.kind === SyntaxKind.ModuleBlock ||
-                    node.kind === SyntaxKind.SourceFile ||
-                    node.kind === SyntaxKind.PropertyDeclaration) {
-                    return node;
-                }
-            }
+            return findAncestor(node.parent, node =>
+                isFunctionLike(node) && !getImmediatelyInvokedFunctionExpression(node) ||
+                node.kind === SyntaxKind.ModuleBlock ||
+                node.kind === SyntaxKind.SourceFile ||
+                node.kind === SyntaxKind.PropertyDeclaration);
         }
 
         // Check if a parameter is assigned anywhere within its declaring function.
@@ -9001,15 +11914,7 @@ namespace ts {
         }
 
         function hasParentWithAssignmentsMarked(node: Node) {
-            while (true) {
-                node = node.parent;
-                if (!node) {
-                    return false;
-                }
-                if (isFunctionLike(node) && getNodeLinks(node).flags & NodeCheckFlags.AssignmentsMarked) {
-                    return true;
-                }
-            }
+            return !!findAncestor(node.parent, node => isFunctionLike(node) && !!(getNodeLinks(node).flags & NodeCheckFlags.AssignmentsMarked));
         }
 
         function markParameterAssignments(node: Node) {
@@ -9026,8 +11931,48 @@ namespace ts {
             }
         }
 
+        function isConstVariable(symbol: Symbol) {
+            return symbol.flags & SymbolFlags.Variable && (getDeclarationNodeFlagsFromSymbol(symbol) & NodeFlags.Const) !== 0 && getTypeOfSymbol(symbol) !== autoArrayType;
+        }
+
+        /** remove undefined from the annotated type of a parameter when there is an initializer (that doesn't include undefined) */
+        function removeOptionalityFromDeclaredType(declaredType: Type, declaration: VariableLikeDeclaration): Type {
+            const annotationIncludesUndefined = strictNullChecks &&
+                declaration.kind === SyntaxKind.Parameter &&
+                declaration.initializer &&
+                getFalsyFlags(declaredType) & TypeFlags.Undefined &&
+                !(getFalsyFlags(checkExpression(declaration.initializer)) & TypeFlags.Undefined);
+            return annotationIncludesUndefined ? getTypeWithFacts(declaredType, TypeFacts.NEUndefined) : declaredType;
+        }
+
+        function isApparentTypePosition(node: Node) {
+            const parent = node.parent;
+            return parent.kind === SyntaxKind.PropertyAccessExpression ||
+                parent.kind === SyntaxKind.CallExpression && (<CallExpression>parent).expression === node ||
+                parent.kind === SyntaxKind.ElementAccessExpression && (<ElementAccessExpression>parent).expression === node;
+        }
+
+        function typeHasNullableConstraint(type: Type) {
+            return type.flags & TypeFlags.TypeVariable && maybeTypeOfKind(getBaseConstraintOfType(type) || emptyObjectType, TypeFlags.Nullable);
+        }
+
+        function getDeclaredOrApparentType(symbol: Symbol, node: Node) {
+            // When a node is the left hand expression of a property access, element access, or call expression,
+            // and the type of the node includes type variables with constraints that are nullable, we fetch the
+            // apparent type of the node *before* performing control flow analysis such that narrowings apply to
+            // the constraint type.
+            const type = getTypeOfSymbol(symbol);
+            if (isApparentTypePosition(node) && forEachType(type, typeHasNullableConstraint)) {
+                return mapType(getWidenedType(type), getApparentType);
+            }
+            return type;
+        }
+
         function checkIdentifier(node: Identifier): Type {
             const symbol = getResolvedSymbol(node);
+            if (symbol === unknownSymbol) {
+                return unknownType;
+            }
 
             // As noted in ECMAScript 6 language spec, arrow functions never have an arguments objects.
             // Although in down-level emit of arrow function, we emit it using function expression which means that
@@ -9037,7 +11982,7 @@ namespace ts {
             // can explicitly bound arguments objects
             if (symbol === argumentsSymbol) {
                 const container = getContainingFunction(node);
-                if (languageVersion < ScriptTarget.ES6) {
+                if (languageVersion < ScriptTarget.ES2015) {
                     if (container.kind === SyntaxKind.ArrowFunction) {
                         error(node, Diagnostics.The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_standard_function_expression);
                     }
@@ -9046,12 +11991,13 @@ namespace ts {
                     }
                 }
 
-                if (node.flags & NodeFlags.AwaitContext) {
-                    getNodeLinks(container).flags |= NodeCheckFlags.CaptureArguments;
-                }
+                getNodeLinks(container).flags |= NodeCheckFlags.CaptureArguments;
+                return getTypeOfSymbol(symbol);
             }
 
-            if (symbol.flags & SymbolFlags.Alias && !isInTypeQuery(node) && !isConstEnumOrConstEnumOnlyModule(resolveAlias(symbol))) {
+            // We should only mark aliases as referenced if there isn't a local value declaration
+            // for the symbol.
+            if (isNonLocalAlias(symbol, /*excludes*/ SymbolFlags.Value) && !isInTypeQuery(node) && !isConstEnumOrConstEnumOnlyModule(resolveAlias(symbol))) {
                 markAliasSymbolAsReferenced(symbol);
             }
 
@@ -9062,8 +12008,7 @@ namespace ts {
                 // Due to the emit for class decorators, any reference to the class from inside of the class body
                 // must instead be rewritten to point to a temporary variable to avoid issues with the double-bind
                 // behavior of class names in ES6.
-                if (languageVersion === ScriptTarget.ES6
-                    && declaration.kind === SyntaxKind.ClassDeclaration
+                if (declaration.kind === SyntaxKind.ClassDeclaration
                     && nodeIsDecorated(declaration)) {
                     let container = getContainingClass(node);
                     while (container !== undefined) {
@@ -9097,13 +12042,27 @@ namespace ts {
 
             checkCollisionWithCapturedSuperVariable(node, node);
             checkCollisionWithCapturedThisVariable(node, node);
+            checkCollisionWithCapturedNewTargetVariable(node, node);
             checkNestedBlockScopedBinding(node, symbol);
 
-            const type = getTypeOfSymbol(localOrExportSymbol);
+            const type = getDeclaredOrApparentType(localOrExportSymbol, node);
             const declaration = localOrExportSymbol.valueDeclaration;
+            const assignmentKind = getAssignmentTargetKind(node);
+
+            if (assignmentKind) {
+                if (!(localOrExportSymbol.flags & SymbolFlags.Variable)) {
+                    error(node, Diagnostics.Cannot_assign_to_0_because_it_is_not_a_variable, symbolToString(symbol));
+                    return unknownType;
+                }
+                if (isReadonlySymbol(localOrExportSymbol)) {
+                    error(node, Diagnostics.Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property, symbolToString(symbol));
+                    return unknownType;
+                }
+            }
+
             // We only narrow variables and parameters occurring in a non-assignment position. For all other
             // entities we simply return the declared type.
-            if (!(localOrExportSymbol.flags & SymbolFlags.Variable) || isAssignmentTarget(node) || !declaration) {
+            if (!(localOrExportSymbol.flags & SymbolFlags.Variable) || assignmentKind === AssignmentKind.Definite || !declaration) {
                 return type;
             }
             // The declaration container is the innermost function that encloses the declaration of the variable
@@ -9116,42 +12075,48 @@ namespace ts {
             // When the control flow originates in a function expression or arrow function and we are referencing
             // a const variable or parameter from an outer function, we extend the origin of the control flow
             // analysis to include the immediately enclosing function.
-            while (flowContainer !== declarationContainer &&
-                (flowContainer.kind === SyntaxKind.FunctionExpression || flowContainer.kind === SyntaxKind.ArrowFunction) &&
-                (isReadonlySymbol(localOrExportSymbol) || isParameter && !isParameterAssigned(localOrExportSymbol))) {
+            while (flowContainer !== declarationContainer && (flowContainer.kind === SyntaxKind.FunctionExpression ||
+                flowContainer.kind === SyntaxKind.ArrowFunction || isObjectLiteralOrClassExpressionMethod(flowContainer)) &&
+                (isConstVariable(localOrExportSymbol) || isParameter && !isParameterAssigned(localOrExportSymbol))) {
                 flowContainer = getControlFlowContainer(flowContainer);
             }
             // We only look for uninitialized variables in strict null checking mode, and only when we can analyze
             // the entire control flow graph from the variable's declaration (i.e. when the flow container and
             // declaration container are the same).
-            const assumeInitialized = !strictNullChecks || (type.flags & TypeFlags.Any) !== 0 || isParameter ||
-                isOuterVariable || isInAmbientContext(declaration);
-            const flowType = getFlowTypeOfReference(node, type, assumeInitialized, flowContainer);
+            const assumeInitialized = isParameter || isOuterVariable ||
+                type !== autoType && type !== autoArrayType && (!strictNullChecks || (type.flags & TypeFlags.Any) !== 0 || isInTypeQuery(node) || node.parent.kind === SyntaxKind.ExportSpecifier) ||
+                node.parent.kind === SyntaxKind.NonNullExpression ||
+                isInAmbientContext(declaration);
+            const initialType = assumeInitialized ? (isParameter ? removeOptionalityFromDeclaredType(type, getRootDeclaration(declaration) as VariableLikeDeclaration) : type) :
+                type === autoType || type === autoArrayType ? undefinedType :
+                    getNullableType(type, TypeFlags.Undefined);
+            const flowType = getFlowTypeOfReference(node, type, initialType, flowContainer, !assumeInitialized);
             // A variable is considered uninitialized when it is possible to analyze the entire control flow graph
             // from declaration to use, and when the variable's declared type doesn't include undefined but the
             // control flow based type does include undefined.
-            if (!assumeInitialized && !(getFalsyFlags(type) & TypeFlags.Undefined) && getFalsyFlags(flowType) & TypeFlags.Undefined) {
+            if (type === autoType || type === autoArrayType) {
+                if (flowType === autoType || flowType === autoArrayType) {
+                    if (noImplicitAny) {
+                        error(getNameOfDeclaration(declaration), Diagnostics.Variable_0_implicitly_has_type_1_in_some_locations_where_its_type_cannot_be_determined, symbolToString(symbol), typeToString(flowType));
+                        error(node, Diagnostics.Variable_0_implicitly_has_an_1_type, symbolToString(symbol), typeToString(flowType));
+                    }
+                    return convertAutoToAny(flowType);
+                }
+            }
+            else if (!assumeInitialized && !(getFalsyFlags(type) & TypeFlags.Undefined) && getFalsyFlags(flowType) & TypeFlags.Undefined) {
                 error(node, Diagnostics.Variable_0_is_used_before_being_assigned, symbolToString(symbol));
                 // Return the declared type to reduce follow-on errors
                 return type;
             }
-            return flowType;
+            return assignmentKind ? getBaseTypeOfLiteralType(flowType) : flowType;
         }
 
         function isInsideFunction(node: Node, threshold: Node): boolean {
-            let current = node;
-            while (current && current !== threshold) {
-                if (isFunctionLike(current)) {
-                    return true;
-                }
-                current = current.parent;
-            }
-
-            return false;
+            return !!findAncestor(node, n => n === threshold ? "quit" : isFunctionLike(n));
         }
 
         function checkNestedBlockScopedBinding(node: Identifier, symbol: Symbol): void {
-            if (languageVersion >= ScriptTarget.ES6 ||
+            if (languageVersion >= ScriptTarget.ES2015 ||
                 (symbol.flags & (SymbolFlags.BlockScopedVariable | SymbolFlags.Class)) === 0 ||
                 symbol.valueDeclaration.parent.kind === SyntaxKind.CatchClause) {
                 return;
@@ -9199,8 +12164,8 @@ namespace ts {
         }
 
         function isAssignedInBodyOfForStatement(node: Identifier, container: ForStatement): boolean {
-            let current: Node = node;
             // skip parenthesized nodes
+            let current: Node = node;
             while (current.parent.kind === SyntaxKind.ParenthesizedExpression) {
                 current = current.parent;
             }
@@ -9221,15 +12186,7 @@ namespace ts {
 
             // at this point we know that node is the target of assignment
             // now check that modification happens inside the statement part of the ForStatement
-            while (current !== container) {
-                if (current === container.statement) {
-                    return true;
-                }
-                else {
-                    current = current.parent;
-                }
-            }
-            return false;
+            return !!findAncestor(current, n => n === container ? "quit" : n === container.statement);
         }
 
         function captureLexicalThis(node: Node, container: Node): void {
@@ -9244,7 +12201,7 @@ namespace ts {
         }
 
         function findFirstSuperCall(n: Node): Node {
-            if (isSuperCallExpression(n)) {
+            if (isSuperCall(n)) {
                 return n;
             }
             else if (isFunctionLike(n)) {
@@ -9283,6 +12240,29 @@ namespace ts {
             return baseConstructorType === nullWideningType;
         }
 
+        function checkThisBeforeSuper(node: Node, container: Node, diagnosticMessage: DiagnosticMessage) {
+            const containingClassDecl = <ClassDeclaration>container.parent;
+            const baseTypeNode = getClassExtendsHeritageClauseElement(containingClassDecl);
+
+            // If a containing class does not have extends clause or the class extends null
+            // skip checking whether super statement is called before "this" accessing.
+            if (baseTypeNode && !classDeclarationExtendsNull(containingClassDecl)) {
+                const superCall = getSuperCallInConstructor(<ConstructorDeclaration>container);
+
+                // We should give an error in the following cases:
+                //      - No super-call
+                //      - "this" is accessing before super-call.
+                //          i.e super(this)
+                //              this.x; super();
+                // We want to make sure that super-call is done before accessing "this" so that
+                // "this" is not accessed as a parameter of the super-call.
+                if (!superCall || superCall.end > node.pos) {
+                    // In ES6, super inside constructor of class-declaration has to precede "this" accessing
+                    error(node, diagnosticMessage);
+                }
+            }
+        }
+
         function checkThisExpression(node: Node): Type {
             // Stop at the first arrow function so that we can
             // tell whether 'this' needs to be captured.
@@ -9290,26 +12270,7 @@ namespace ts {
             let needToCaptureLexicalThis = false;
 
             if (container.kind === SyntaxKind.Constructor) {
-                const containingClassDecl = <ClassDeclaration>container.parent;
-                const baseTypeNode = getClassExtendsHeritageClauseElement(containingClassDecl);
-
-                // If a containing class does not have extends clause or the class extends null
-                // skip checking whether super statement is called before "this" accessing.
-                if (baseTypeNode && !classDeclarationExtendsNull(containingClassDecl)) {
-                    const superCall = getSuperCallInConstructor(<ConstructorDeclaration>container);
-
-                    // We should give an error in the following cases:
-                    //      - No super-call
-                    //      - "this" is accessing before super-call.
-                    //          i.e super(this)
-                    //              this.x; super();
-                    // We want to make sure that super-call is done before accessing "this" so that
-                    // "this" is not accessed as a parameter of the super-call.
-                    if (!superCall || superCall.end > node.pos) {
-                        // In ES6, super inside constructor of class-declaration has to precede "this" accessing
-                        error(node, Diagnostics.super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class);
-                    }
-                }
+                checkThisBeforeSuper(node, container, Diagnostics.super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class);
             }
 
             // Now skip arrow functions to get the "real" owner of 'this'.
@@ -9317,7 +12278,7 @@ namespace ts {
                 container = getThisContainer(container, /* includeArrowFunctions */ false);
 
                 // When targeting es6, arrow function lexically bind "this" so we do not need to do the work of binding "this" in emitted code
-                needToCaptureLexicalThis = (languageVersion < ScriptTarget.ES6);
+                needToCaptureLexicalThis = (languageVersion < ScriptTarget.ES2015);
             }
 
             switch (container.kind) {
@@ -9351,14 +12312,14 @@ namespace ts {
                 captureLexicalThis(node, container);
             }
             if (isFunctionLike(container) &&
-                (!isInParameterInitializerBeforeContainingFunction(node) || getFunctionLikeThisParameter(container))) {
+                (!isInParameterInitializerBeforeContainingFunction(node) || getThisParameter(container))) {
                 // Note: a parameter initializer should refer to class-this unless function-this is explicitly annotated.
 
                 // If this is a function in a JS file, it might be a class method. Check if it's the RHS
                 // of a x.prototype.y = function [name]() { .... }
                 if (container.kind === SyntaxKind.FunctionExpression &&
-                    isInJavaScriptFile(container.parent) &&
-                    getSpecialPropertyAssignmentKind(container.parent) === SpecialPropertyAssignmentKind.PrototypeProperty) {
+                    container.parent.kind === SyntaxKind.BinaryExpression &&
+                    getSpecialPropertyAssignmentKind(container.parent as BinaryExpression) === SpecialPropertyAssignmentKind.PrototypeProperty) {
                     // Get the 'x' of 'x.prototype.y = f' (here, 'f' is 'container')
                     const className = (((container.parent as BinaryExpression)   // x.prototype.y = f
                         .left as PropertyAccessExpression)       // x.prototype.y
@@ -9370,7 +12331,7 @@ namespace ts {
                     }
                 }
 
-                const thisType = getThisTypeOfDeclaration(container);
+                const thisType = getThisTypeOfDeclaration(container) || getContextualThisParameterType(container);
                 if (thisType) {
                     return thisType;
                 }
@@ -9379,7 +12340,7 @@ namespace ts {
             if (isClassLike(container.parent)) {
                 const symbol = getSymbolOfNode(container.parent);
                 const type = hasModifier(container, ModifierFlags.Static) ? getTypeOfSymbol(symbol) : (<InterfaceType>getDeclaredTypeOfSymbol(symbol)).thisType;
-                return getFlowTypeOfReference(node, type, /*assumeInitialized*/ true, /*flowContainer*/ undefined);
+                return getFlowTypeOfReference(node, type);
             }
 
             if (isInJavaScriptFile(node)) {
@@ -9389,7 +12350,7 @@ namespace ts {
                 }
             }
 
-            if (compilerOptions.noImplicitThis) {
+            if (noImplicitThis) {
                 // With noImplicitThis, functions may not reference 'this' if it has type 'any'
                 error(node, Diagnostics.this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation);
             }
@@ -9397,9 +12358,9 @@ namespace ts {
         }
 
         function getTypeForThisExpressionFromJSDoc(node: Node) {
-            const typeTag = getJSDocTypeTag(node);
-            if (typeTag && typeTag.typeExpression && typeTag.typeExpression.type && typeTag.typeExpression.type.kind === SyntaxKind.JSDocFunctionType) {
-                const jsDocFunctionType = <JSDocFunctionType>typeTag.typeExpression.type;
+            const jsdocType = getJSDocType(node);
+            if (jsdocType && jsdocType.kind === SyntaxKind.JSDocFunctionType) {
+                const jsDocFunctionType = <JSDocFunctionType>jsdocType;
                 if (jsDocFunctionType.parameters.length > 0 && jsDocFunctionType.parameters[0].type.kind === SyntaxKind.JSDocThisType) {
                     return getTypeFromTypeNode(jsDocFunctionType.parameters[0].type);
                 }
@@ -9407,12 +12368,7 @@ namespace ts {
         }
 
         function isInConstructorArgumentInitializer(node: Node, constructorDecl: Node): boolean {
-            for (let n = node; n && n !== constructorDecl; n = n.parent) {
-                if (n.kind === SyntaxKind.Parameter) {
-                    return true;
-                }
-            }
-            return false;
+            return !!findAncestor(node, n => n === constructorDecl ? "quit" : n.kind === SyntaxKind.Parameter);
         }
 
         function checkSuperExpression(node: Node): Type {
@@ -9425,7 +12381,7 @@ namespace ts {
             if (!isCallExpression) {
                 while (container && container.kind === SyntaxKind.ArrowFunction) {
                     container = getSuperContainer(container, /*stopOnFunctions*/ true);
-                    needToCaptureLexicalThis = languageVersion < ScriptTarget.ES6;
+                    needToCaptureLexicalThis = languageVersion < ScriptTarget.ES2015;
                 }
             }
 
@@ -9438,10 +12394,7 @@ namespace ts {
                 // class B {
                 //     [super.foo()]() {}
                 // }
-                let current = node;
-                while (current && current !== container && current.kind !== SyntaxKind.ComputedPropertyName) {
-                    current = current.parent;
-                }
+                const current = findAncestor(node, n => n === container ? "quit" : n.kind === SyntaxKind.ComputedPropertyName);
                 if (current && current.kind === SyntaxKind.ComputedPropertyName) {
                     error(node, Diagnostics.super_cannot_be_referenced_in_a_computed_property_name);
                 }
@@ -9457,6 +12410,10 @@ namespace ts {
                 return unknownType;
             }
 
+            if (!isCallExpression && container.kind === SyntaxKind.Constructor) {
+                checkThisBeforeSuper(node, container, Diagnostics.super_must_be_called_before_accessing_a_property_of_super_in_the_constructor_of_a_derived_class);
+            }
+
             if ((getModifierFlags(container) & ModifierFlags.Static) || isCallExpression) {
                 nodeCheckFlag = NodeCheckFlags.SuperStatic;
             }
@@ -9539,7 +12496,7 @@ namespace ts {
             }
 
             if (container.parent.kind === SyntaxKind.ObjectLiteralExpression) {
-                if (languageVersion < ScriptTarget.ES6) {
+                if (languageVersion < ScriptTarget.ES2015) {
                     error(node, Diagnostics.super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_higher);
                     return unknownType;
                 }
@@ -9610,14 +12567,71 @@ namespace ts {
             }
         }
 
-        function getContextualThisParameter(func: FunctionLikeDeclaration): Symbol {
-            if (isContextSensitiveFunctionOrObjectLiteralMethod(func) && func.kind !== SyntaxKind.ArrowFunction) {
+        function getContainingObjectLiteral(func: FunctionLikeDeclaration) {
+            return (func.kind === SyntaxKind.MethodDeclaration ||
+                func.kind === SyntaxKind.GetAccessor ||
+                func.kind === SyntaxKind.SetAccessor) && func.parent.kind === SyntaxKind.ObjectLiteralExpression ? <ObjectLiteralExpression>func.parent :
+                func.kind === SyntaxKind.FunctionExpression && func.parent.kind === SyntaxKind.PropertyAssignment ? <ObjectLiteralExpression>func.parent.parent :
+                    undefined;
+        }
+
+        function getThisTypeArgument(type: Type): Type {
+            return getObjectFlags(type) & ObjectFlags.Reference && (<TypeReference>type).target === globalThisType ? (<TypeReference>type).typeArguments[0] : undefined;
+        }
+
+        function getThisTypeFromContextualType(type: Type): Type {
+            return mapType(type, t => {
+                return t.flags & TypeFlags.Intersection ? forEach((<IntersectionType>t).types, getThisTypeArgument) : getThisTypeArgument(t);
+            });
+        }
+
+        function getContextualThisParameterType(func: FunctionLikeDeclaration): Type {
+            if (func.kind === SyntaxKind.ArrowFunction) {
+                return undefined;
+            }
+            if (isContextSensitiveFunctionOrObjectLiteralMethod(func)) {
                 const contextualSignature = getContextualSignature(func);
                 if (contextualSignature) {
-                    return contextualSignature.thisParameter;
+                    const thisParameter = contextualSignature.thisParameter;
+                    if (thisParameter) {
+                        return getTypeOfSymbol(thisParameter);
+                    }
+                }
+            }
+            if (noImplicitThis) {
+                const containingLiteral = getContainingObjectLiteral(func);
+                if (containingLiteral) {
+                    // We have an object literal method. Check if the containing object literal has a contextual type
+                    // that includes a ThisType<T>. If so, T is the contextual type for 'this'. We continue looking in
+                    // any directly enclosing object literals.
+                    const contextualType = getApparentTypeOfContextualType(containingLiteral);
+                    let literal = containingLiteral;
+                    let type = contextualType;
+                    while (type) {
+                        const thisType = getThisTypeFromContextualType(type);
+                        if (thisType) {
+                            return instantiateType(thisType, getContextualMapper(containingLiteral));
+                        }
+                        if (literal.parent.kind !== SyntaxKind.PropertyAssignment) {
+                            break;
+                        }
+                        literal = <ObjectLiteralExpression>literal.parent.parent;
+                        type = getApparentTypeOfContextualType(literal);
+                    }
+                    // There was no contextual ThisType<T> for the containing object literal, so the contextual type
+                    // for 'this' is the non-null form of the contextual type for the containing object literal or
+                    // the type of the object literal itself.
+                    return contextualType ? getNonNullableType(contextualType) : checkExpressionCached(containingLiteral);
+                }
+                // In an assignment of the form 'obj.xxx = function(...)' or 'obj[xxx] = function(...)', the
+                // contextual type for 'this' is 'obj'.
+                if (func.parent.kind === SyntaxKind.BinaryExpression && (<BinaryExpression>func.parent).operatorToken.kind === SyntaxKind.EqualsToken) {
+                    const target = (<BinaryExpression>func.parent).left;
+                    if (target.kind === SyntaxKind.PropertyAccessExpression || target.kind === SyntaxKind.ElementAccessExpression) {
+                        return checkExpressionCached((<PropertyAccessExpression | ElementAccessExpression>target).expression);
+                    }
                 }
             }
-
             return undefined;
         }
 
@@ -9626,23 +12640,23 @@ namespace ts {
             const func = parameter.parent;
             if (isContextSensitiveFunctionOrObjectLiteralMethod(func)) {
                 const iife = getImmediatelyInvokedFunctionExpression(func);
-                if (iife) {
+                if (iife && iife.arguments) {
                     const indexOfParameter = indexOf(func.parameters, parameter);
-                    if (iife.arguments && indexOfParameter < iife.arguments.length) {
-                        if (parameter.dotDotDotToken) {
-                            const restTypes: Type[] = [];
-                            for (let i = indexOfParameter; i < iife.arguments.length; i++) {
-                                restTypes.push(getWidenedLiteralType(checkExpression(iife.arguments[i])));
-                            }
-                            return createArrayType(getUnionType(restTypes));
-                        }
-                        const links = getNodeLinks(iife);
-                        const cached = links.resolvedSignature;
-                        links.resolvedSignature = anySignature;
-                        const type = getWidenedLiteralType(checkExpression(iife.arguments[indexOfParameter]));
-                        links.resolvedSignature = cached;
-                        return type;
-                    }
+                    if (parameter.dotDotDotToken) {
+                        const restTypes: Type[] = [];
+                        for (let i = indexOfParameter; i < iife.arguments.length; i++) {
+                            restTypes.push(getWidenedLiteralType(checkExpression(iife.arguments[i])));
+                        }
+                        return restTypes.length ? createArrayType(getUnionType(restTypes)) : undefined;
+                    }
+                    const links = getNodeLinks(iife);
+                    const cached = links.resolvedSignature;
+                    links.resolvedSignature = anySignature;
+                    const type = indexOfParameter < iife.arguments.length ?
+                        getWidenedLiteralType(checkExpression(iife.arguments[indexOfParameter])) :
+                        parameter.initializer ? undefined : undefinedWideningType;
+                    links.resolvedSignature = cached;
+                    return type;
                 }
                 const contextualSignature = getContextualSignature(func);
                 if (contextualSignature) {
@@ -9675,8 +12689,15 @@ namespace ts {
         function getContextualTypeForInitializerExpression(node: Expression): Type {
             const declaration = <VariableLikeDeclaration>node.parent;
             if (node === declaration.initializer) {
-                if (declaration.type) {
-                    return getTypeFromTypeNode(declaration.type);
+                const typeNode = getEffectiveTypeAnnotationNode(declaration);
+                if (typeNode) {
+                    return getTypeFromTypeNode(typeNode);
+                }
+                if (isInJavaScriptFile(declaration)) {
+                    const jsDocType = getTypeForDeclarationFromJSDocComment(declaration);
+                    if (jsDocType) {
+                        return jsDocType;
+                    }
                 }
                 if (declaration.kind === SyntaxKind.Parameter) {
                     const type = getContextuallyTypedParameterType(<ParameterDeclaration>declaration);
@@ -9690,12 +12711,13 @@ namespace ts {
                 if (isBindingPattern(declaration.parent)) {
                     const parentDeclaration = declaration.parent.parent;
                     const name = declaration.propertyName || declaration.name;
-                    if (isVariableLike(parentDeclaration) &&
-                        parentDeclaration.type &&
-                        !isBindingPattern(name)) {
-                        const text = getTextOfPropertyName(name);
-                        if (text) {
-                            return getTypeOfPropertyOfType(getTypeFromTypeNode(parentDeclaration.type), text);
+                    if (parentDeclaration.kind !== SyntaxKind.BindingElement) {
+                        const parentTypeNode = getEffectiveTypeAnnotationNode(parentDeclaration);
+                        if (parentTypeNode && !isBindingPattern(name)) {
+                            const text = getTextOfPropertyName(name);
+                            if (text) {
+                                return getTypeOfPropertyOfType(getTypeFromTypeNode(parentTypeNode), text);
+                            }
                         }
                     }
                 }
@@ -9705,31 +12727,29 @@ namespace ts {
 
         function getContextualTypeForReturnExpression(node: Expression): Type {
             const func = getContainingFunction(node);
-
-            if (isAsyncFunctionLike(func)) {
-                const contextualReturnType = getContextualReturnType(func);
-                if (contextualReturnType) {
-                    return getPromisedType(contextualReturnType);
+            if (func) {
+                const functionFlags = getFunctionFlags(func);
+                if (functionFlags & FunctionFlags.Generator) { // AsyncGenerator function or Generator function
+                    return undefined;
                 }
 
-                return undefined;
-            }
-
-            if (func && !func.asteriskToken) {
-                return getContextualReturnType(func);
+                const contextualReturnType = getContextualReturnType(func);
+                return functionFlags & FunctionFlags.Async
+                    ? contextualReturnType && getAwaitedTypeOfPromise(contextualReturnType) // Async function
+                    : contextualReturnType; // Regular function
             }
-
             return undefined;
         }
 
         function getContextualTypeForYieldOperand(node: YieldExpression): Type {
             const func = getContainingFunction(node);
             if (func) {
+                const functionFlags = getFunctionFlags(func);
                 const contextualReturnType = getContextualReturnType(func);
                 if (contextualReturnType) {
                     return node.asteriskToken
                         ? contextualReturnType
-                        : getElementTypeOfIterableIterator(contextualReturnType);
+                        : getIteratedTypeOfGenerator(contextualReturnType, (functionFlags & FunctionFlags.Async) !== 0);
                 }
             }
 
@@ -9751,9 +12771,9 @@ namespace ts {
         function getContextualReturnType(functionDecl: FunctionLikeDeclaration): Type {
             // If the containing function has a return type annotation, is a constructor, or is a get accessor whose
             // corresponding set accessor has a type annotation, return statements in the function are contextually typed
-            if (functionDecl.type ||
-                functionDecl.kind === SyntaxKind.Constructor ||
-                functionDecl.kind === SyntaxKind.GetAccessor && getSetAccessorTypeAnnotationNode(<AccessorDeclaration>getDeclarationOfKind(functionDecl.symbol, SyntaxKind.SetAccessor))) {
+            if (functionDecl.kind === SyntaxKind.Constructor ||
+                getEffectiveReturnTypeNode(functionDecl) ||
+                isGetAccessorWithAnnotatedSetAccessor(functionDecl)) {
                 return getReturnTypeOfSignature(getSignatureFromDeclaration(functionDecl));
             }
 
@@ -9789,7 +12809,7 @@ namespace ts {
         function getContextualTypeForBinaryOperand(node: Expression): Type {
             const binaryExpression = <BinaryExpression>node.parent;
             const operator = binaryExpression.operatorToken.kind;
-            if (operator >= SyntaxKind.FirstAssignment && operator <= SyntaxKind.LastAssignment) {
+            if (isAssignmentOperator(operator)) {
                 // Don't do this for special property assignments to avoid circularity
                 if (getSpecialPropertyAssignmentKind(binaryExpression) !== SpecialPropertyAssignmentKind.None) {
                     return undefined;
@@ -9797,7 +12817,7 @@ namespace ts {
 
                 // In an assignment expression, the right operand is contextually typed by the type of the left operand.
                 if (node === binaryExpression.right) {
-                    return checkExpression(binaryExpression.left);
+                    return getTypeOfExpression(binaryExpression.left);
                 }
             }
             else if (operator === SyntaxKind.BarBarToken) {
@@ -9805,7 +12825,7 @@ namespace ts {
                 // expression has no contextual type, the right operand is contextually typed by the type of the left operand.
                 let type = getContextualType(binaryExpression);
                 if (!type && node === binaryExpression.right) {
-                    type = checkExpression(binaryExpression.left);
+                    type = getTypeOfExpression(binaryExpression.left);
                 }
                 return type;
             }
@@ -9818,42 +12838,15 @@ namespace ts {
             return undefined;
         }
 
-        // Apply a mapping function to a contextual type and return the resulting type. If the contextual type
-        // is a union type, the mapping function is applied to each constituent type and a union of the resulting
-        // types is returned.
-        function applyToContextualType(type: Type, mapper: (t: Type) => Type): Type {
-            if (!(type.flags & TypeFlags.Union)) {
-                return mapper(type);
-            }
-            const types = (<UnionType>type).types;
-            let mappedType: Type;
-            let mappedTypes: Type[];
-            for (const current of types) {
-                const t = mapper(current);
-                if (t) {
-                    if (!mappedType) {
-                        mappedType = t;
-                    }
-                    else if (!mappedTypes) {
-                        mappedTypes = [mappedType, t];
-                    }
-                    else {
-                        mappedTypes.push(t);
-                    }
-                }
-            }
-            return mappedTypes ? getUnionType(mappedTypes) : mappedType;
-        }
-
         function getTypeOfPropertyOfContextualType(type: Type, name: string) {
-            return applyToContextualType(type, t => {
+            return mapType(type, t => {
                 const prop = t.flags & TypeFlags.StructuredType ? getPropertyOfType(t, name) : undefined;
                 return prop ? getTypeOfSymbol(prop) : undefined;
             });
         }
 
         function getIndexTypeOfContextualType(type: Type, kind: IndexKind) {
-            return applyToContextualType(type, t => getIndexTypeOfStructuredType(t, kind));
+            return mapType(type, t => getIndexTypeOfStructuredType(t, kind));
         }
 
         // Return true if the given contextual type is a tuple-like type
@@ -9907,7 +12900,7 @@ namespace ts {
                 const index = indexOf(arrayLiteral.elements, node);
                 return getTypeOfPropertyOfContextualType(type, "" + index)
                     || getIndexTypeOfContextualType(type, IndexKind.Number)
-                    || (languageVersion >= ScriptTarget.ES6 ? getElementTypeOfIterable(type, /*errorNode*/ undefined) : undefined);
+                    || getIteratedTypeOrElementType(type, /*errorNode*/ undefined, /*allowStringInput*/ false, /*allowAsyncIterables*/ false, /*checkAssignability*/ false);
             }
             return undefined;
         }
@@ -9918,22 +12911,51 @@ namespace ts {
             return node === conditional.whenTrue || node === conditional.whenFalse ? getContextualType(conditional) : undefined;
         }
 
+        function getContextualTypeForJsxExpression(node: JsxExpression): Type {
+            // JSX expression can appear in two position : JSX Element's children or JSX attribute
+            const jsxAttributes = isJsxAttributeLike(node.parent) ?
+                node.parent.parent :
+                node.parent.openingElement.attributes; // node.parent is JsxElement
+
+            // When we trying to resolve JsxOpeningLikeElement as a stateless function element, we will already give its attributes a contextual type
+            // which is a type of the parameter of the signature we are trying out.
+            // If there is no contextual type (e.g. we are trying to resolve stateful component), get attributes type from resolving element's tagName
+            const attributesType = getContextualType(jsxAttributes);
+
+            if (!attributesType || isTypeAny(attributesType)) {
+                return undefined;
+            }
+
+            if (isJsxAttribute(node.parent)) {
+                // JSX expression is in JSX attribute
+                return getTypeOfPropertyOfType(attributesType, (node.parent as JsxAttribute).name.text);
+            }
+            else if (node.parent.kind === SyntaxKind.JsxElement) {
+                // JSX expression is in children of JSX Element, we will look for an "children" atttribute (we get the name from JSX.ElementAttributesProperty)
+                const jsxChildrenPropertyName = getJsxElementChildrenPropertyname();
+                return jsxChildrenPropertyName && jsxChildrenPropertyName !== "" ? getTypeOfPropertyOfType(attributesType, jsxChildrenPropertyName) : anyType;
+            }
+            else {
+                // JSX expression is in JSX spread attribute
+                return attributesType;
+            }
+        }
+
         function getContextualTypeForJsxAttribute(attribute: JsxAttribute | JsxSpreadAttribute) {
-            const kind = attribute.kind;
-            const jsxElement = attribute.parent as JsxOpeningLikeElement;
-            const attrsType = getJsxElementAttributesType(jsxElement);
+            // When we trying to resolve JsxOpeningLikeElement as a stateless function element, we will already give its attributes a contextual type
+            // which is a type of the parameter of the signature we are trying out.
+            // If there is no contextual type (e.g. we are trying to resolve stateful component), get attributes type from resolving element's tagName
+            const attributesType = getContextualType(<Expression>attribute.parent);
 
-            if (attribute.kind === SyntaxKind.JsxAttribute) {
-                if (!attrsType || isTypeAny(attrsType)) {
+            if (isJsxAttribute(attribute)) {
+                if (!attributesType || isTypeAny(attributesType)) {
                     return undefined;
                 }
-                return getTypeOfPropertyOfType(attrsType, (attribute as JsxAttribute).name.text);
+                return getTypeOfPropertyOfType(attributesType, (attribute as JsxAttribute).name.text);
             }
-            else if (attribute.kind === SyntaxKind.JsxSpreadAttribute) {
-                return attrsType;
+            else {
+                return attributesType;
             }
-
-            Debug.fail(`Expected JsxAttribute or JsxSpreadAttribute, got ts.SyntaxKind[${kind}]`);
         }
 
         // Return the contextual type for a given expression node. During overload resolution, a contextual type may temporarily
@@ -9960,7 +12982,7 @@ namespace ts {
          * @param node the expression whose contextual type will be returned.
          * @returns the contextual type of an expression.
          */
-        function getContextualType(node: Expression): Type {
+        function getContextualType(node: Expression): Type | undefined {
             if (isInsideWithStatementBody(node)) {
                 // We cannot answer semantic questions within a with block, do not proceed any further
                 return undefined;
@@ -9992,6 +13014,8 @@ namespace ts {
                 case SyntaxKind.PropertyAssignment:
                 case SyntaxKind.ShorthandPropertyAssignment:
                     return getContextualTypeForObjectLiteralElement(<ObjectLiteralElementLike>parent);
+                case SyntaxKind.SpreadAssignment:
+                    return getApparentTypeOfContextualType(parent.parent as ObjectLiteralExpression);
                 case SyntaxKind.ArrayLiteralExpression:
                     return getContextualTypeForElementExpression(node);
                 case SyntaxKind.ConditionalExpression:
@@ -10002,27 +13026,51 @@ namespace ts {
                 case SyntaxKind.ParenthesizedExpression:
                     return getContextualType(<ParenthesizedExpression>parent);
                 case SyntaxKind.JsxExpression:
-                    return getContextualType(<JsxExpression>parent);
+                    return getContextualTypeForJsxExpression(<JsxExpression>parent);
                 case SyntaxKind.JsxAttribute:
                 case SyntaxKind.JsxSpreadAttribute:
                     return getContextualTypeForJsxAttribute(<JsxAttribute | JsxSpreadAttribute>parent);
+                case SyntaxKind.JsxOpeningElement:
+                case SyntaxKind.JsxSelfClosingElement:
+                    return getAttributesTypeFromJsxOpeningLikeElement(<JsxOpeningLikeElement>parent);
             }
             return undefined;
         }
 
-        // If the given type is an object or union type, if that type has a single signature, and if
-        // that signature is non-generic, return the signature. Otherwise return undefined.
-        function getNonGenericSignature(type: Type): Signature {
+        function getContextualMapper(node: Node) {
+            node = findAncestor(node, n => !!n.contextualMapper);
+            return node ? node.contextualMapper : identityMapper;
+        }
+
+        // If the given type is an object or union type with a single signature, and if that signature has at
+        // least as many parameters as the given function, return the signature. Otherwise return undefined.
+        function getContextualCallSignature(type: Type, node: FunctionExpression | ArrowFunction | MethodDeclaration): Signature {
             const signatures = getSignaturesOfStructuredType(type, SignatureKind.Call);
             if (signatures.length === 1) {
                 const signature = signatures[0];
-                if (!signature.typeParameters) {
+                if (!isAritySmaller(signature, node)) {
                     return signature;
                 }
             }
         }
 
-        function isFunctionExpressionOrArrowFunction(node: Node): node is FunctionExpression {
+        /** If the contextual signature has fewer parameters than the function expression, do not use it */
+        function isAritySmaller(signature: Signature, target: FunctionExpression | ArrowFunction | MethodDeclaration) {
+            let targetParameterCount = 0;
+            for (; targetParameterCount < target.parameters.length; targetParameterCount++) {
+                const param = target.parameters[targetParameterCount];
+                if (param.initializer || param.questionToken || param.dotDotDotToken || isJSDocOptionalParameter(param)) {
+                    break;
+                }
+            }
+            if (target.parameters.length && parameterIsThisKeyword(target.parameters[0])) {
+                targetParameterCount--;
+            }
+            const sourceLength = signature.hasRestParameter ? Number.MAX_VALUE : signature.parameters.length;
+            return sourceLength < targetParameterCount;
+        }
+
+        function isFunctionExpressionOrArrowFunction(node: Node): node is FunctionExpression | ArrowFunction {
             return node.kind === SyntaxKind.FunctionExpression || node.kind === SyntaxKind.ArrowFunction;
         }
 
@@ -10033,7 +13081,7 @@ namespace ts {
                 : undefined;
         }
 
-        function getContextualTypeForFunctionLikeDeclaration(node: FunctionExpression | MethodDeclaration) {
+        function getContextualTypeForFunctionLikeDeclaration(node: FunctionExpression | ArrowFunction | MethodDeclaration) {
             return isObjectLiteralMethod(node) ?
                 getContextualTypeForObjectLiteralMethod(node) :
                 getApparentTypeOfContextualType(node);
@@ -10044,19 +13092,19 @@ namespace ts {
         // If the contextual type is a union type, get the signature from each type possible and if they are
         // all identical ignoring their return type, the result is same signature but with return type as
         // union type of return types from these signatures
-        function getContextualSignature(node: FunctionExpression | MethodDeclaration): Signature {
+        function getContextualSignature(node: FunctionExpression | ArrowFunction | MethodDeclaration): Signature {
             Debug.assert(node.kind !== SyntaxKind.MethodDeclaration || isObjectLiteralMethod(node));
             const type = getContextualTypeForFunctionLikeDeclaration(node);
             if (!type) {
                 return undefined;
             }
             if (!(type.flags & TypeFlags.Union)) {
-                return getNonGenericSignature(type);
+                return getContextualCallSignature(type, node);
             }
             let signatureList: Signature[];
             const types = (<UnionType>type).types;
             for (const current of types) {
-                const signature = getNonGenericSignature(current);
+                const signature = getContextualCallSignature(current, node);
                 if (signature) {
                     if (!signatureList) {
                         // This signature will contribute to contextual union signature
@@ -10084,34 +13132,13 @@ namespace ts {
             return result;
         }
 
-        /**
-         * Detect if the mapper implies an inference context. Specifically, there are 4 possible values
-         * for a mapper. Let's go through each one of them:
-         *
-         *    1. undefined - this means we are not doing inferential typing, but we may do contextual typing,
-         *       which could cause us to assign a parameter a type
-         *    2. identityMapper - means we want to avoid assigning a parameter a type, whether or not we are in
-         *       inferential typing (context is undefined for the identityMapper)
-         *    3. a mapper created by createInferenceMapper - we are doing inferential typing, we want to assign
-         *       types to parameters and fix type parameters (context is defined)
-         *    4. an instantiation mapper created by createTypeMapper or createTypeEraser - this should never be
-         *       passed as the contextual mapper when checking an expression (context is undefined for these)
-         *
-         * isInferentialContext is detecting if we are in case 3
-         */
-        function isInferentialContext(mapper: TypeMapper) {
-            return mapper && mapper.context;
-        }
+        function checkSpreadExpression(node: SpreadElement, checkMode?: CheckMode): Type {
+            if (languageVersion < ScriptTarget.ES2015 && compilerOptions.downlevelIteration) {
+                checkExternalEmitHelpers(node, ExternalEmitHelpers.SpreadIncludes);
+            }
 
-        function checkSpreadElementExpression(node: SpreadElementExpression, contextualMapper?: TypeMapper): Type {
-            // It is usually not safe to call checkExpressionCached if we can be contextually typing.
-            // You can tell that we are contextually typing because of the contextualMapper parameter.
-            // While it is true that a spread element can have a contextual type, it does not do anything
-            // with this type. It is neither affected by it, nor does it propagate it to its operand.
-            // So the fact that contextualMapper is passed is not important, because the operand of a spread
-            // element is not contextually typed.
-            const arrayOrIterableType = checkExpressionCached(node.expression, contextualMapper);
-            return checkIteratedTypeOrElementType(arrayOrIterableType, node.expression, /*allowStringInput*/ false);
+            const arrayOrIterableType = checkExpression(node.expression, checkMode);
+            return checkIteratedTypeOrElementType(arrayOrIterableType, node.expression, /*allowStringInput*/ false, /*allowAsyncIterables*/ false);
         }
 
         function hasDefaultValue(node: BindingElement | Expression): boolean {
@@ -10119,13 +13146,13 @@ namespace ts {
                 (node.kind === SyntaxKind.BinaryExpression && (<BinaryExpression>node).operatorToken.kind === SyntaxKind.EqualsToken);
         }
 
-        function checkArrayLiteral(node: ArrayLiteralExpression, contextualMapper?: TypeMapper): Type {
+        function checkArrayLiteral(node: ArrayLiteralExpression, checkMode?: CheckMode): Type {
             const elements = node.elements;
             let hasSpreadElement = false;
             const elementTypes: Type[] = [];
             const inDestructuringPattern = isAssignmentTarget(node);
             for (const e of elements) {
-                if (inDestructuringPattern && e.kind === SyntaxKind.SpreadElementExpression) {
+                if (inDestructuringPattern && e.kind === SyntaxKind.SpreadElement) {
                     // Given the following situation:
                     //    var c: {};
                     //    [...c] = ["", 0];
@@ -10138,18 +13165,18 @@ namespace ts {
                     // get the contextual element type from it. So we do something similar to
                     // getContextualTypeForElementExpression, which will crucially not error
                     // if there is no index type / iterated type.
-                    const restArrayType = checkExpression((<SpreadElementExpression>e).expression, contextualMapper);
+                    const restArrayType = checkExpression((<SpreadElement>e).expression, checkMode);
                     const restElementType = getIndexTypeOfType(restArrayType, IndexKind.Number) ||
-                        (languageVersion >= ScriptTarget.ES6 ? getElementTypeOfIterable(restArrayType, /*errorNode*/ undefined) : undefined);
+                        getIteratedTypeOrElementType(restArrayType, /*errorNode*/ undefined, /*allowStringInput*/ false, /*allowAsyncIterables*/ false, /*checkAssignability*/ false);
                     if (restElementType) {
                         elementTypes.push(restElementType);
                     }
                 }
                 else {
-                    const type = checkExpressionForMutableLocation(e, contextualMapper);
+                    const type = checkExpressionForMutableLocation(e, checkMode);
                     elementTypes.push(type);
                 }
-                hasSpreadElement = hasSpreadElement || e.kind === SyntaxKind.SpreadElementExpression;
+                hasSpreadElement = hasSpreadElement || e.kind === SyntaxKind.SpreadElement;
             }
             if (!hasSpreadElement) {
                 // If array literal is actually a destructuring pattern, mark it as an implied type. We do this such
@@ -10250,10 +13277,10 @@ namespace ts {
             return links.resolvedType;
         }
 
-        function getObjectLiteralIndexInfo(node: ObjectLiteralExpression, properties: Symbol[], kind: IndexKind): IndexInfo {
+        function getObjectLiteralIndexInfo(propertyNodes: NodeArray<ObjectLiteralElementLike>, offset: number, properties: Symbol[], kind: IndexKind): IndexInfo {
             const propTypes: Type[] = [];
             for (let i = 0; i < properties.length; i++) {
-                if (kind === IndexKind.String || isNumericName(node.properties[i].name)) {
+                if (kind === IndexKind.String || isNumericName(propertyNodes[i + offset].name)) {
                     propTypes.push(getTypeOfSymbol(properties[i]));
                 }
             }
@@ -10261,39 +13288,46 @@ namespace ts {
             return createIndexInfo(unionType, /*isReadonly*/ false);
         }
 
-        function checkObjectLiteral(node: ObjectLiteralExpression, contextualMapper?: TypeMapper): Type {
+        function checkObjectLiteral(node: ObjectLiteralExpression, checkMode?: CheckMode): Type {
             const inDestructuringPattern = isAssignmentTarget(node);
             // Grammar checking
             checkGrammarObjectLiteralExpression(node, inDestructuringPattern);
 
-            const propertiesTable = createMap<Symbol>();
-            const propertiesArray: Symbol[] = [];
+            let propertiesTable = createMap<Symbol>();
+            let propertiesArray: Symbol[] = [];
+            let spread: Type = emptyObjectType;
+            let propagatedFlags: TypeFlags = 0;
+
             const contextualType = getApparentTypeOfContextualType(node);
             const contextualTypeHasPattern = contextualType && contextualType.pattern &&
                 (contextualType.pattern.kind === SyntaxKind.ObjectBindingPattern || contextualType.pattern.kind === SyntaxKind.ObjectLiteralExpression);
+            const isJSObjectLiteral = !contextualType && isInJavaScriptFile(node);
             let typeFlags: TypeFlags = 0;
             let patternWithComputedProperties = false;
             let hasComputedStringProperty = false;
             let hasComputedNumberProperty = false;
 
-            for (const memberDecl of node.properties) {
+            let offset = 0;
+            for (let i = 0; i < node.properties.length; i++) {
+                const memberDecl = node.properties[i];
                 let member = memberDecl.symbol;
                 if (memberDecl.kind === SyntaxKind.PropertyAssignment ||
                     memberDecl.kind === SyntaxKind.ShorthandPropertyAssignment ||
                     isObjectLiteralMethod(memberDecl)) {
                     let type: Type;
                     if (memberDecl.kind === SyntaxKind.PropertyAssignment) {
-                        type = checkPropertyAssignment(<PropertyAssignment>memberDecl, contextualMapper);
+                        type = checkPropertyAssignment(<PropertyAssignment>memberDecl, checkMode);
                     }
                     else if (memberDecl.kind === SyntaxKind.MethodDeclaration) {
-                        type = checkObjectLiteralMethod(<MethodDeclaration>memberDecl, contextualMapper);
+                        type = checkObjectLiteralMethod(<MethodDeclaration>memberDecl, checkMode);
                     }
                     else {
                         Debug.assert(memberDecl.kind === SyntaxKind.ShorthandPropertyAssignment);
-                        type = checkExpressionForMutableLocation((<ShorthandPropertyAssignment>memberDecl).name, contextualMapper);
+                        type = checkExpressionForMutableLocation((<ShorthandPropertyAssignment>memberDecl).name, checkMode);
                     }
+
                     typeFlags |= type.flags;
-                    const prop = <TransientSymbol>createSymbol(SymbolFlags.Property | SymbolFlags.Transient | member.flags, member.name);
+                    const prop = createSymbol(SymbolFlags.Property | member.flags, member.name);
                     if (inDestructuringPattern) {
                         // If object literal is an assignment pattern and if the assignment pattern specifies a default value
                         // for the property, make the property optional.
@@ -10307,14 +13341,15 @@ namespace ts {
                             patternWithComputedProperties = true;
                         }
                     }
-                    else if (contextualTypeHasPattern && !(contextualType.flags & TypeFlags.ObjectLiteralPatternWithComputedProperties)) {
+                    else if (contextualTypeHasPattern && !(getObjectFlags(contextualType) & ObjectFlags.ObjectLiteralPatternWithComputedProperties)) {
                         // If object literal is contextually typed by the implied type of a binding pattern, and if the
                         // binding pattern specifies a default value for the property, make the property optional.
                         const impliedProp = getPropertyOfType(contextualType, member.name);
                         if (impliedProp) {
                             prop.flags |= impliedProp.flags & SymbolFlags.Optional;
                         }
-                        else if (!compilerOptions.suppressExcessPropertyErrors) {
+
+                        else if (!compilerOptions.suppressExcessPropertyErrors && !getIndexInfoOfType(contextualType, IndexKind.String)) {
                             error(memberDecl.name, Diagnostics.Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1,
                                 symbolToString(member), typeToString(contextualType));
                         }
@@ -10329,6 +13364,27 @@ namespace ts {
                     prop.target = member;
                     member = prop;
                 }
+                else if (memberDecl.kind === SyntaxKind.SpreadAssignment) {
+                    if (languageVersion < ScriptTarget.ES2015) {
+                        checkExternalEmitHelpers(memberDecl, ExternalEmitHelpers.Assign);
+                    }
+                    if (propertiesArray.length > 0) {
+                        spread = getSpreadType(spread, createObjectLiteralType());
+                        propertiesArray = [];
+                        propertiesTable = createMap<Symbol>();
+                        hasComputedStringProperty = false;
+                        hasComputedNumberProperty = false;
+                        typeFlags = 0;
+                    }
+                    const type = checkExpression((memberDecl as SpreadAssignment).expression);
+                    if (!isValidSpreadType(type)) {
+                        error(memberDecl, Diagnostics.Spread_types_may_only_be_created_from_object_types);
+                        return unknownType;
+                    }
+                    spread = getSpreadType(spread, type);
+                    offset = i + 1;
+                    continue;
+                }
                 else {
                     // TypeScript 1.0 spec (April 2014)
                     // A get accessor declaration is processed in the same manner as
@@ -10336,7 +13392,7 @@ namespace ts {
                     // A set accessor declaration is processed in the same manner
                     // as an ordinary function declaration with a single parameter and a Void return type.
                     Debug.assert(memberDecl.kind === SyntaxKind.GetAccessor || memberDecl.kind === SyntaxKind.SetAccessor);
-                    checkAccessorDeclaration(<AccessorDeclaration>memberDecl);
+                    checkNodeDeferred(memberDecl);
                 }
 
                 if (hasDynamicName(memberDecl)) {
@@ -10348,7 +13404,7 @@ namespace ts {
                     }
                 }
                 else {
-                    propertiesTable[member.name] = member;
+                    propertiesTable.set(member.name, member);
                 }
                 propertiesArray.push(member);
             }
@@ -10357,34 +13413,65 @@ namespace ts {
             // type with those properties for which the binding pattern specifies a default value.
             if (contextualTypeHasPattern) {
                 for (const prop of getPropertiesOfType(contextualType)) {
-                    if (!propertiesTable[prop.name]) {
+                    if (!propertiesTable.get(prop.name)) {
                         if (!(prop.flags & SymbolFlags.Optional)) {
                             error(prop.valueDeclaration || (<TransientSymbol>prop).bindingElement,
                                 Diagnostics.Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value);
                         }
-                        propertiesTable[prop.name] = prop;
+                        propertiesTable.set(prop.name, prop);
                         propertiesArray.push(prop);
                     }
                 }
             }
 
-            const stringIndexInfo = hasComputedStringProperty ? getObjectLiteralIndexInfo(node, propertiesArray, IndexKind.String) : undefined;
-            const numberIndexInfo = hasComputedNumberProperty ? getObjectLiteralIndexInfo(node, propertiesArray, IndexKind.Number) : undefined;
-            const result = createAnonymousType(node.symbol, propertiesTable, emptyArray, emptyArray, stringIndexInfo, numberIndexInfo);
-            const freshObjectLiteralFlag = compilerOptions.suppressExcessPropertyErrors ? 0 : TypeFlags.FreshLiteral;
-            result.flags |= TypeFlags.ObjectLiteral | TypeFlags.ContainsObjectLiteral | freshObjectLiteralFlag | (typeFlags & TypeFlags.PropagatingFlags) | (patternWithComputedProperties ? TypeFlags.ObjectLiteralPatternWithComputedProperties : 0);
-            if (inDestructuringPattern) {
-                result.pattern = node;
+            if (spread !== emptyObjectType) {
+                if (propertiesArray.length > 0) {
+                    spread = getSpreadType(spread, createObjectLiteralType());
+                }
+                if (spread.flags & TypeFlags.Object) {
+                    // only set the symbol and flags if this is a (fresh) object type
+                    spread.flags |= propagatedFlags;
+                    spread.flags |= TypeFlags.FreshLiteral;
+                    (spread as ObjectType).objectFlags |= ObjectFlags.ObjectLiteral;
+                    spread.symbol = node.symbol;
+                }
+                return spread;
             }
-            return result;
+
+            return createObjectLiteralType();
+
+            function createObjectLiteralType() {
+                const stringIndexInfo = isJSObjectLiteral ? jsObjectLiteralIndexInfo : hasComputedStringProperty ? getObjectLiteralIndexInfo(node.properties, offset, propertiesArray, IndexKind.String) : undefined;
+                const numberIndexInfo = hasComputedNumberProperty && !isJSObjectLiteral ? getObjectLiteralIndexInfo(node.properties, offset, propertiesArray, IndexKind.Number) : undefined;
+                const result = createAnonymousType(node.symbol, propertiesTable, emptyArray, emptyArray, stringIndexInfo, numberIndexInfo);
+                const freshObjectLiteralFlag = compilerOptions.suppressExcessPropertyErrors ? 0 : TypeFlags.FreshLiteral;
+                result.flags |= TypeFlags.ContainsObjectLiteral | freshObjectLiteralFlag | (typeFlags & TypeFlags.PropagatingFlags);
+                result.objectFlags |= ObjectFlags.ObjectLiteral;
+                if (patternWithComputedProperties) {
+                    result.objectFlags |= ObjectFlags.ObjectLiteralPatternWithComputedProperties;
+                }
+                if (inDestructuringPattern) {
+                    result.pattern = node;
+                }
+                if (!(result.flags & TypeFlags.Nullable)) {
+                    propagatedFlags |= (result.flags & TypeFlags.PropagatingFlags);
+                }
+                return result;
+            }
+        }
+
+        function isValidSpreadType(type: Type): boolean {
+            return !!(type.flags & (TypeFlags.Any | TypeFlags.Null | TypeFlags.Undefined | TypeFlags.NonPrimitive) ||
+                type.flags & TypeFlags.Object && !isGenericMappedType(type) ||
+                type.flags & TypeFlags.UnionOrIntersection && !forEach((<UnionOrIntersectionType>type).types, t => !isValidSpreadType(t)));
         }
 
-        function checkJsxSelfClosingElement(node: JsxSelfClosingElement) {
+        function checkJsxSelfClosingElement(node: JsxSelfClosingElement): Type {
             checkJsxOpeningLikeElement(node);
-            return jsxElementType || anyType;
+            return getJsxGlobalElementType() || anyType;
         }
 
-        function checkJsxElement(node: JsxElement) {
+        function checkJsxElement(node: JsxElement): Type {
             // Check attributes
             checkJsxOpeningLikeElement(node.openingElement);
 
@@ -10396,22 +13483,7 @@ namespace ts {
                 checkExpression(node.closingElement.tagName);
             }
 
-            // Check children
-            for (const child of node.children) {
-                switch (child.kind) {
-                    case SyntaxKind.JsxExpression:
-                        checkJsxExpression(<JsxExpression>child);
-                        break;
-                    case SyntaxKind.JsxElement:
-                        checkJsxElement(<JsxElement>child);
-                        break;
-                    case SyntaxKind.JsxSelfClosingElement:
-                        checkJsxSelfClosingElement(<JsxSelfClosingElement>child);
-                        break;
-                }
-            }
-
-            return jsxElementType || anyType;
+            return getJsxGlobalElementType() || anyType;
         }
 
         /**
@@ -10433,83 +13505,163 @@ namespace ts {
             else {
                 return isIntrinsicJsxName((<Identifier>tagName).text);
             }
-        }
+        }
+
+        /**
+         * Get attributes type of the JSX opening-like element. The result is from resolving "attributes" property of the opening-like element.
+         *
+         * @param openingLikeElement a JSX opening-like element
+         * @param filter a function to remove attributes that will not participate in checking whether attributes are assignable
+         * @return an anonymous type (similar to the one returned by checkObjectLiteral) in which its properties are attributes property.
+         * @remarks Because this function calls getSpreadType, it needs to use the same checks as checkObjectLiteral,
+         * which also calls getSpreadType.
+         */
+        function createJsxAttributesTypeFromAttributesProperty(openingLikeElement: JsxOpeningLikeElement, filter?: (symbol: Symbol) => boolean, checkMode?: CheckMode) {
+            const attributes = openingLikeElement.attributes;
+            let attributesTable = createMap<Symbol>();
+            let spread: Type = emptyObjectType;
+            let attributesArray: Symbol[] = [];
+            let hasSpreadAnyType = false;
+            let typeToIntersect: Type;
+            let explicitlySpecifyChildrenAttribute = false;
+            const jsxChildrenPropertyName = getJsxElementChildrenPropertyname();
+
+            for (const attributeDecl of attributes.properties) {
+                const member = attributeDecl.symbol;
+                if (isJsxAttribute(attributeDecl)) {
+                    const exprType = attributeDecl.initializer ?
+                        checkExpression(attributeDecl.initializer, checkMode) :
+                        trueType;  // <Elem attr /> is sugar for <Elem attr={true} />
+
+                    const attributeSymbol = <TransientSymbol>createSymbol(SymbolFlags.Property | SymbolFlags.Transient | member.flags, member.name);
+                    attributeSymbol.declarations = member.declarations;
+                    attributeSymbol.parent = member.parent;
+                    if (member.valueDeclaration) {
+                        attributeSymbol.valueDeclaration = member.valueDeclaration;
+                    }
+                    attributeSymbol.type = exprType;
+                    attributeSymbol.target = member;
+                    attributesTable.set(attributeSymbol.name, attributeSymbol);
+                    attributesArray.push(attributeSymbol);
+                    if (attributeDecl.name.text === jsxChildrenPropertyName) {
+                        explicitlySpecifyChildrenAttribute = true;
+                    }
+                }
+                else {
+                    Debug.assert(attributeDecl.kind === SyntaxKind.JsxSpreadAttribute);
+                    if (attributesArray.length > 0) {
+                        spread = getSpreadType(spread, createJsxAttributesType(attributes.symbol, attributesTable));
+                        attributesArray = [];
+                        attributesTable = createMap<Symbol>();
+                    }
+                    const exprType = checkExpression(attributeDecl.expression);
+                    if (isTypeAny(exprType)) {
+                        hasSpreadAnyType = true;
+                    }
+                    if (isValidSpreadType(exprType)) {
+                        spread = getSpreadType(spread, exprType);
+                    }
+                    else {
+                        typeToIntersect = typeToIntersect ? getIntersectionType([typeToIntersect, exprType]) : exprType;
+                    }
+                }
+            }
 
-        function checkJsxAttribute(node: JsxAttribute, elementAttributesType: Type, nameTable: Map<boolean>) {
-            let correspondingPropType: Type = undefined;
+            if (!hasSpreadAnyType) {
+                if (spread !== emptyObjectType) {
+                    if (attributesArray.length > 0) {
+                        spread = getSpreadType(spread, createJsxAttributesType(attributes.symbol, attributesTable));
+                    }
+                    attributesArray = getPropertiesOfType(spread);
+                }
 
-            // Look up the corresponding property for this attribute
-            if (elementAttributesType === emptyObjectType && isUnhyphenatedJsxName(node.name.text)) {
-                // If there is no 'props' property, you may not have non-"data-" attributes
-                error(node.parent, Diagnostics.JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property, getJsxElementPropertiesName());
+                attributesTable = createMap<Symbol>();
+                for (const attr of attributesArray) {
+                    if (!filter || filter(attr)) {
+                        attributesTable.set(attr.name, attr);
+                    }
+                }
             }
-            else if (elementAttributesType && !isTypeAny(elementAttributesType)) {
-                const correspondingPropSymbol = getPropertyOfType(elementAttributesType, node.name.text);
-                correspondingPropType = correspondingPropSymbol && getTypeOfSymbol(correspondingPropSymbol);
-                if (isUnhyphenatedJsxName(node.name.text)) {
-                    const attributeType = getTypeOfPropertyOfType(elementAttributesType, getTextOfPropertyName(node.name)) || getIndexTypeOfType(elementAttributesType, IndexKind.String);
-                    if (attributeType) {
-                        correspondingPropType = attributeType;
+
+            // Handle children attribute
+            const parent = openingLikeElement.parent.kind === SyntaxKind.JsxElement ? openingLikeElement.parent as JsxElement : undefined;
+            // We have to check that openingElement of the parent is the one we are visiting as this may not be true for selfClosingElement
+            if (parent && parent.openingElement === openingLikeElement && parent.children.length > 0) {
+                const childrenTypes: Type[] = [];
+                for (const child of (parent as JsxElement).children) {
+                    // In React, JSX text that contains only whitespaces will be ignored so we don't want to type-check that
+                    // because then type of children property will have constituent of string type.
+                    if (child.kind === SyntaxKind.JsxText) {
+                        if (!child.containsOnlyWhiteSpaces) {
+                            childrenTypes.push(stringType);
+                        }
                     }
                     else {
-                        // If there's no corresponding property with this name, error
-                        if (!correspondingPropType) {
-                            error(node.name, Diagnostics.Property_0_does_not_exist_on_type_1, node.name.text, typeToString(elementAttributesType));
-                            return unknownType;
-                        }
+                        childrenTypes.push(checkExpression(child, checkMode));
                     }
                 }
-            }
 
-            let exprType: Type;
-            if (node.initializer) {
-                exprType = checkExpression(node.initializer);
-            }
-            else {
-                // <Elem attr /> is sugar for <Elem attr={true} />
-                exprType = booleanType;
-            }
+                if (!hasSpreadAnyType && jsxChildrenPropertyName && jsxChildrenPropertyName !== "") {
+                    // Error if there is a attribute named "children" explicitly specified and children element.
+                    // This is because children element will overwrite the value from attributes.
+                    // Note: we will not warn "children" attribute overwritten if "children" attribute is specified in object spread.
+                    if (explicitlySpecifyChildrenAttribute) {
+                        error(attributes, Diagnostics._0_are_specified_twice_The_attribute_named_0_will_be_overwritten, jsxChildrenPropertyName);
+                    }
 
-            if (correspondingPropType) {
-                checkTypeAssignableTo(exprType, correspondingPropType, node);
+                    // If there are children in the body of JSX element, create dummy attribute "children" with anyType so that it will pass the attribute checking process
+                    const childrenPropSymbol = createSymbol(SymbolFlags.Property | SymbolFlags.Transient, jsxChildrenPropertyName);
+                    childrenPropSymbol.type = childrenTypes.length === 1 ?
+                        childrenTypes[0] :
+                        createArrayType(getUnionType(childrenTypes,  /*subtypeReduction*/ false));
+                    attributesTable.set(jsxChildrenPropertyName, childrenPropSymbol);
+                }
             }
 
-            nameTable[node.name.text] = true;
-            return exprType;
-        }
+            if (hasSpreadAnyType) {
+                return anyType;
+            }
 
-        function checkJsxSpreadAttribute(node: JsxSpreadAttribute, elementAttributesType: Type, nameTable: Map<boolean>) {
-            const type = checkExpression(node.expression);
-            const props = getPropertiesOfType(type);
-            for (const prop of props) {
-                // Is there a corresponding property in the element attributes type? Skip checking of properties
-                // that have already been assigned to, as these are not actually pushed into the resulting type
-                if (!nameTable[prop.name]) {
-                    const targetPropSym = getPropertyOfType(elementAttributesType, prop.name);
-                    if (targetPropSym) {
-                        const msg = chainDiagnosticMessages(undefined, Diagnostics.Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property, prop.name);
-                        checkTypeAssignableTo(getTypeOfSymbol(prop), getTypeOfSymbol(targetPropSym), node, undefined, msg);
-                    }
+            const attributeType = createJsxAttributesType(attributes.symbol, attributesTable);
+            return typeToIntersect && attributesTable.size ? getIntersectionType([typeToIntersect, attributeType]) :
+                typeToIntersect ? typeToIntersect : attributeType;
 
-                    nameTable[prop.name] = true;
-                }
+            /**
+             * Create anonymous type from given attributes symbol table.
+             * @param symbol a symbol of JsxAttributes containing attributes corresponding to attributesTable
+             * @param attributesTable a symbol table of attributes property
+             */
+            function createJsxAttributesType(symbol: Symbol, attributesTable: Map<Symbol>) {
+                const result = createAnonymousType(symbol, attributesTable, emptyArray, emptyArray, /*stringIndexInfo*/ undefined, /*numberIndexInfo*/ undefined);
+                result.flags |= TypeFlags.JsxAttributes | TypeFlags.ContainsObjectLiteral;
+                result.objectFlags |= ObjectFlags.ObjectLiteral;
+                return result;
             }
-            return type;
+        }
+
+        /**
+         * Check attributes property of opening-like element. This function is called during chooseOverload to get call signature of a JSX opening-like element.
+         * (See "checkApplicableSignatureForJsxOpeningLikeElement" for how the function is used)
+         * @param node a JSXAttributes to be resolved of its type
+         */
+        function checkJsxAttributes(node: JsxAttributes, checkMode?: CheckMode) {
+            return createJsxAttributesTypeFromAttributesProperty(node.parent as JsxOpeningLikeElement, /*filter*/ undefined, checkMode);
         }
 
         function getJsxType(name: string) {
-            if (jsxTypes[name] === undefined) {
-                return jsxTypes[name] = getExportedTypeFromNamespace(JsxNames.JSX, name) || unknownType;
+            let jsxType = jsxTypes.get(name);
+            if (jsxType === undefined) {
+                jsxTypes.set(name, jsxType = getExportedTypeFromNamespace(JsxNames.JSX, name) || unknownType);
             }
-            return jsxTypes[name];
+            return jsxType;
         }
 
         /**
-          * Looks up an intrinsic tag name and returns a symbol that either points to an intrinsic
-          * property (in which case nodeLinks.jsxFlags will be IntrinsicNamedElement) or an intrinsic
-          * string index signature (in which case nodeLinks.jsxFlags will be IntrinsicIndexedElement).
-          * May also return unknownSymbol if both of these lookups fail.
-          */
+         * Looks up an intrinsic tag name and returns a symbol that either points to an intrinsic
+         * property (in which case nodeLinks.jsxFlags will be IntrinsicNamedElement) or an intrinsic
+         * string index signature (in which case nodeLinks.jsxFlags will be IntrinsicIndexedElement).
+         * May also return unknownSymbol if both of these lookups fail.
+         */
         function getIntrinsicTagSymbol(node: JsxOpeningLikeElement | JsxClosingElement): Symbol {
             const links = getNodeLinks(node);
             if (!links.resolvedSymbol) {
@@ -10534,7 +13686,7 @@ namespace ts {
                     return links.resolvedSymbol = unknownSymbol;
                 }
                 else {
-                    if (compilerOptions.noImplicitAny) {
+                    if (noImplicitAny) {
                         error(node, Diagnostics.JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists, JsxNames.IntrinsicElements);
                     }
                     return links.resolvedSymbol = unknownSymbol;
@@ -10567,70 +13719,227 @@ namespace ts {
                 }
             }
 
-            return getUnionType(signatures.map(getReturnTypeOfSignature), /*subtypeReduction*/ true);
+            const instantiatedSignatures = [];
+            for (const signature of signatures) {
+                if (signature.typeParameters) {
+                    const typeArguments = fillMissingTypeArguments(/*typeArguments*/ undefined, signature.typeParameters, /*minTypeArgumentCount*/ 0);
+                    instantiatedSignatures.push(getSignatureInstantiation(signature, typeArguments));
+                }
+                else {
+                    instantiatedSignatures.push(signature);
+                }
+            }
+
+            return getUnionType(map(instantiatedSignatures, getReturnTypeOfSignature), /*subtypeReduction*/ true);
         }
 
-        /// e.g. "props" for React.d.ts,
-        /// or 'undefined' if ElementAttributesProperty doesn't exist (which means all
-        ///     non-intrinsic elements' attributes type is 'any'),
-        /// or '' if it has 0 properties (which means every
-        ///     non-intrinsic elements' attributes type is the element instance type)
-        function getJsxElementPropertiesName() {
+        /**
+         * Look into JSX namespace and then look for container with matching name as nameOfAttribPropContainer.
+         * Get a single property from that container if existed. Report an error if there are more than one property.
+         *
+         * @param nameOfAttribPropContainer a string of value JsxNames.ElementAttributesPropertyNameContainer or JsxNames.ElementChildrenAttributeNameContainer
+         *          if other string is given or the container doesn't exist, return undefined.
+         */
+        function getNameFromJsxElementAttributesContainer(nameOfAttribPropContainer: string): string {
             // JSX
-            const jsxNamespace = getGlobalSymbol(JsxNames.JSX, SymbolFlags.Namespace, /*diagnosticMessage*/undefined);
-            // JSX.ElementAttributesProperty [symbol]
-            const attribsPropTypeSym = jsxNamespace && getSymbol(jsxNamespace.exports, JsxNames.ElementAttributesPropertyNameContainer, SymbolFlags.Type);
-            // JSX.ElementAttributesProperty [type]
-            const attribPropType = attribsPropTypeSym && getDeclaredTypeOfSymbol(attribsPropTypeSym);
-            // The properties of JSX.ElementAttributesProperty
-            const attribProperties = attribPropType && getPropertiesOfType(attribPropType);
-
-            if (attribProperties) {
+            const jsxNamespace = getGlobalSymbol(JsxNames.JSX, SymbolFlags.Namespace, /*diagnosticMessage*/ undefined);
+            // JSX.ElementAttributesProperty | JSX.ElementChildrenAttribute [symbol]
+            const jsxElementAttribPropInterfaceSym = jsxNamespace && getSymbol(jsxNamespace.exports, nameOfAttribPropContainer, SymbolFlags.Type);
+            // JSX.ElementAttributesProperty | JSX.ElementChildrenAttribute [type]
+            const jsxElementAttribPropInterfaceType = jsxElementAttribPropInterfaceSym && getDeclaredTypeOfSymbol(jsxElementAttribPropInterfaceSym);
+            // The properties of JSX.ElementAttributesProperty | JSX.ElementChildrenAttribute
+            const propertiesOfJsxElementAttribPropInterface = jsxElementAttribPropInterfaceType && getPropertiesOfType(jsxElementAttribPropInterfaceType);
+            if (propertiesOfJsxElementAttribPropInterface) {
                 // Element Attributes has zero properties, so the element attributes type will be the class instance type
-                if (attribProperties.length === 0) {
+                if (propertiesOfJsxElementAttribPropInterface.length === 0) {
                     return "";
                 }
                 // Element Attributes has one property, so the element attributes type will be the type of the corresponding
                 // property of the class instance type
-                else if (attribProperties.length === 1) {
-                    return attribProperties[0].name;
+                else if (propertiesOfJsxElementAttribPropInterface.length === 1) {
+                    return propertiesOfJsxElementAttribPropInterface[0].name;
                 }
-                // More than one property on ElementAttributesProperty is an error
-                else {
-                    error(attribsPropTypeSym.declarations[0], Diagnostics.The_global_type_JSX_0_may_not_have_more_than_one_property, JsxNames.ElementAttributesPropertyNameContainer);
-                    return undefined;
+                else if (propertiesOfJsxElementAttribPropInterface.length > 1) {
+                    // More than one property on ElementAttributesProperty is an error
+                    error(jsxElementAttribPropInterfaceSym.declarations[0], Diagnostics.The_global_type_JSX_0_may_not_have_more_than_one_property, nameOfAttribPropContainer);
                 }
             }
-            else {
-                // No interface exists, so the element attributes type will be an implicit any
+            return undefined;
+        }
+
+        /// e.g. "props" for React.d.ts,
+        /// or 'undefined' if ElementAttributesProperty doesn't exist (which means all
+        ///     non-intrinsic elements' attributes type is 'any'),
+        /// or '' if it has 0 properties (which means every
+        ///     non-intrinsic elements' attributes type is the element instance type)
+        function getJsxElementPropertiesName() {
+            if (!_hasComputedJsxElementPropertiesName) {
+                _hasComputedJsxElementPropertiesName = true;
+                _jsxElementPropertiesName = getNameFromJsxElementAttributesContainer(JsxNames.ElementAttributesPropertyNameContainer);
+            }
+
+            return _jsxElementPropertiesName;
+        }
+
+        function getJsxElementChildrenPropertyname(): string {
+            if (!_hasComputedJsxElementChildrenPropertyName) {
+                _hasComputedJsxElementChildrenPropertyName = true;
+                _jsxElementChildrenPropertyName = getNameFromJsxElementAttributesContainer(JsxNames.ElementChildrenAttributeNameContainer);
+            }
+
+            return _jsxElementChildrenPropertyName;
+        }
+
+        function getApparentTypeOfJsxPropsType(propsType: Type): Type {
+            if (!propsType) {
                 return undefined;
             }
+            if (propsType.flags & TypeFlags.Intersection) {
+                const propsApparentType: Type[] = [];
+                for (const t of (<UnionOrIntersectionType>propsType).types) {
+                    propsApparentType.push(getApparentType(t));
+                }
+                return getIntersectionType(propsApparentType);
+            }
+            return getApparentType(propsType);
+        }
+
+        /**
+         * Get JSX attributes type by trying to resolve openingLikeElement as a stateless function component.
+         * Return only attributes type of successfully resolved call signature.
+         * This function assumes that the caller handled other possible element type of the JSX element (e.g. stateful component)
+         * Unlike tryGetAllJsxStatelessFunctionAttributesType, this function is a default behavior of type-checkers.
+         * @param openingLikeElement a JSX opening-like element to find attributes type
+         * @param elementType a type of the opening-like element. This elementType can't be an union type
+         * @param elemInstanceType an element instance type (the result of newing or invoking this tag)
+         * @param elementClassType a JSX-ElementClass type. This is a result of looking up ElementClass interface in the JSX global
+         */
+        function defaultTryGetJsxStatelessFunctionAttributesType(openingLikeElement: JsxOpeningLikeElement, elementType: Type, elemInstanceType: Type, elementClassType?: Type): Type {
+            Debug.assert(!(elementType.flags & TypeFlags.Union));
+            if (!elementClassType || !isTypeAssignableTo(elemInstanceType, elementClassType)) {
+                const jsxStatelessElementType = getJsxGlobalStatelessElementType();
+                if (jsxStatelessElementType) {
+                    // We don't call getResolvedSignature here because we have already resolve the type of JSX Element.
+                    const callSignature = getResolvedJsxStatelessFunctionSignature(openingLikeElement, elementType, /*candidatesOutArray*/ undefined);
+                    if (callSignature !== unknownSignature) {
+                        const callReturnType = callSignature && getReturnTypeOfSignature(callSignature);
+                        let paramType = callReturnType && (callSignature.parameters.length === 0 ? emptyObjectType : getTypeOfSymbol(callSignature.parameters[0]));
+                        paramType = getApparentTypeOfJsxPropsType(paramType);
+                        if (callReturnType && isTypeAssignableTo(callReturnType, jsxStatelessElementType)) {
+                            // Intersect in JSX.IntrinsicAttributes if it exists
+                            const intrinsicAttributes = getJsxType(JsxNames.IntrinsicAttributes);
+                            if (intrinsicAttributes !== unknownType) {
+                                paramType = intersectTypes(intrinsicAttributes, paramType);
+                            }
+                            return paramType;
+                        }
+                    }
+                }
+            }
+            return undefined;
+        }
+
+        /**
+         * Get JSX attributes type by trying to resolve openingLikeElement as a stateless function component.
+         * Return all attributes type of resolved call signature including candidate signatures.
+         * This function assumes that the caller handled other possible element type of the JSX element.
+         * This function is a behavior used by language service when looking up completion in JSX element.
+         * @param openingLikeElement a JSX opening-like element to find attributes type
+         * @param elementType a type of the opening-like element. This elementType can't be an union type
+         * @param elemInstanceType an element instance type (the result of newing or invoking this tag)
+         * @param elementClassType a JSX-ElementClass type. This is a result of looking up ElementClass interface in the JSX global
+         */
+        function tryGetAllJsxStatelessFunctionAttributesType(openingLikeElement: JsxOpeningLikeElement, elementType: Type, elemInstanceType: Type, elementClassType?: Type): Type {
+            Debug.assert(!(elementType.flags & TypeFlags.Union));
+            if (!elementClassType || !isTypeAssignableTo(elemInstanceType, elementClassType)) {
+                // Is this is a stateless function component? See if its single signature's return type is assignable to the JSX Element Type
+                const jsxStatelessElementType = getJsxGlobalStatelessElementType();
+                if (jsxStatelessElementType) {
+                    // We don't call getResolvedSignature because here we have already resolve the type of JSX Element.
+                    const candidatesOutArray: Signature[] = [];
+                    getResolvedJsxStatelessFunctionSignature(openingLikeElement, elementType, candidatesOutArray);
+                    let result: Type;
+                    let allMatchingAttributesType: Type;
+                    for (const candidate of candidatesOutArray) {
+                        const callReturnType = getReturnTypeOfSignature(candidate);
+                        let paramType = callReturnType && (candidate.parameters.length === 0 ? emptyObjectType : getTypeOfSymbol(candidate.parameters[0]));
+                        paramType = getApparentTypeOfJsxPropsType(paramType);
+                        if (callReturnType && isTypeAssignableTo(callReturnType, jsxStatelessElementType)) {
+                            let shouldBeCandidate = true;
+                            for (const attribute of openingLikeElement.attributes.properties) {
+                                if (isJsxAttribute(attribute) &&
+                                    isUnhyphenatedJsxName(attribute.name.text) &&
+                                    !getPropertyOfType(paramType, attribute.name.text)) {
+                                    shouldBeCandidate = false;
+                                    break;
+                                }
+                            }
+                            if (shouldBeCandidate) {
+                                result = intersectTypes(result, paramType);
+                            }
+                            allMatchingAttributesType = intersectTypes(allMatchingAttributesType, paramType);
+                        }
+                    }
+
+                    // If we can't find any matching, just return everything.
+                    if (!result) {
+                        result = allMatchingAttributesType;
+                    }
+                    // Intersect in JSX.IntrinsicAttributes if it exists
+                    const intrinsicAttributes = getJsxType(JsxNames.IntrinsicAttributes);
+                    if (intrinsicAttributes !== unknownType) {
+                        result = intersectTypes(intrinsicAttributes, result);
+                    }
+                    return result;
+                }
+            }
+            return undefined;
         }
 
         /**
-         * Given React element instance type and the class type, resolve the Jsx type
-         * Pass elemType to handle individual type in the union typed element type.
+         * Resolve attributes type of the given opening-like element. The attributes type is a type of attributes associated with the given elementType.
+         * For instance:
+         *      declare function Foo(attr: { p1: string}): JSX.Element;
+         *      <Foo p1={10} />;  // This function will try resolve "Foo" and return an attributes type of "Foo" which is "{ p1: string }"
+         *
+         * The function is intended to initially be called from getAttributesTypeFromJsxOpeningLikeElement which already handle JSX-intrinsic-element..
+         * This function will try to resolve custom JSX attributes type in following order: string literal, stateless function, and stateful component
+         *
+         * @param openingLikeElement a non-intrinsic JSXOPeningLikeElement
+         * @param shouldIncludeAllStatelessAttributesType a boolean indicating whether to include all attributes types from all stateless function signature
+         * @param elementType an instance type of the given opening-like element. If undefined, the function will check type openinglikeElement's tagname.
+         * @param elementClassType a JSX-ElementClass type. This is a result of looking up ElementClass interface in the JSX global (imported from react.d.ts)
+         * @return attributes type if able to resolve the type of node
+         *         anyType if there is no type ElementAttributesProperty or there is an error
+         *         emptyObjectType if there is no "prop" in the element instance type
          */
-        function getResolvedJsxType(node: JsxOpeningLikeElement, elemType?: Type, elemClassType?: Type): Type {
-            if (!elemType) {
-                elemType = checkExpression(node.tagName);
+        function resolveCustomJsxElementAttributesType(openingLikeElement: JsxOpeningLikeElement,
+            shouldIncludeAllStatelessAttributesType: boolean,
+            elementType?: Type,
+            elementClassType?: Type): Type {
+            if (!elementType) {
+                elementType = checkExpression(openingLikeElement.tagName);
             }
-            if (elemType.flags & TypeFlags.Union) {
-                const types = (<UnionOrIntersectionType>elemType).types;
+
+            if (elementType.flags & TypeFlags.Union) {
+                const types = (elementType as UnionType).types;
                 return getUnionType(types.map(type => {
-                    return getResolvedJsxType(node, type, elemClassType);
+                    return resolveCustomJsxElementAttributesType(openingLikeElement, shouldIncludeAllStatelessAttributesType, type, elementClassType);
                 }), /*subtypeReduction*/ true);
             }
 
             // If the elemType is a string type, we have to return anyType to prevent an error downstream as we will try to find construct or call signature of the type
-            if (elemType.flags & TypeFlags.String) {
+            if (elementType.flags & TypeFlags.String) {
                 return anyType;
             }
-            else if (elemType.flags & TypeFlags.StringLiteral) {
+            else if (elementType.flags & TypeFlags.StringLiteral) {
                 // If the elemType is a stringLiteral type, we can then provide a check to make sure that the string literal type is one of the Jsx intrinsic element type
+                // For example:
+                //      var CustomTag: "h1" = "h1";
+                //      <CustomTag> Hello World </CustomTag>
                 const intrinsicElementsType = getJsxType(JsxNames.IntrinsicElements);
                 if (intrinsicElementsType !== unknownType) {
-                    const stringLiteralTypeName = (<LiteralType>elemType).text;
+                    const stringLiteralTypeName = (<StringLiteralType>elementType).value;
                     const intrinsicProp = getPropertyOfType(intrinsicElementsType, stringLiteralTypeName);
                     if (intrinsicProp) {
                         return getTypeOfSymbol(intrinsicProp);
@@ -10639,37 +13948,28 @@ namespace ts {
                     if (indexSignatureType) {
                         return indexSignatureType;
                     }
-                    error(node, Diagnostics.Property_0_does_not_exist_on_type_1, stringLiteralTypeName, "JSX." + JsxNames.IntrinsicElements);
+                    error(openingLikeElement, Diagnostics.Property_0_does_not_exist_on_type_1, stringLiteralTypeName, "JSX." + JsxNames.IntrinsicElements);
                 }
                 // If we need to report an error, we already done so here. So just return any to prevent any more error downstream
                 return anyType;
             }
 
             // Get the element instance type (the result of newing or invoking this tag)
-            const elemInstanceType = getJsxElementInstanceType(node, elemType);
+            const elemInstanceType = getJsxElementInstanceType(openingLikeElement, elementType);
 
-            if (!elemClassType || !isTypeAssignableTo(elemInstanceType, elemClassType)) {
-                // Is this is a stateless function component? See if its single signature's return type is
-                // assignable to the JSX Element Type
-                if (jsxElementType) {
-                    const callSignatures = elemType && getSignaturesOfType(elemType, SignatureKind.Call);
-                    const callSignature = callSignatures && callSignatures.length > 0 && callSignatures[0];
-                    const callReturnType = callSignature && getReturnTypeOfSignature(callSignature);
-                    let paramType = callReturnType && (callSignature.parameters.length === 0 ? emptyObjectType : getTypeOfSymbol(callSignature.parameters[0]));
-                    if (callReturnType && isTypeAssignableTo(callReturnType, jsxElementType)) {
-                        // Intersect in JSX.IntrinsicAttributes if it exists
-                        const intrinsicAttributes = getJsxType(JsxNames.IntrinsicAttributes);
-                        if (intrinsicAttributes !== unknownType) {
-                            paramType = intersectTypes(intrinsicAttributes, paramType);
-                        }
-                        return paramType;
-                    }
-                }
+            // If we should include all stateless attributes type, then get all attributes type from all stateless function signature.
+            // Otherwise get only attributes type from the signature picked by choose-overload logic.
+            const statelessAttributesType = shouldIncludeAllStatelessAttributesType ?
+                tryGetAllJsxStatelessFunctionAttributesType(openingLikeElement, elementType, elemInstanceType, elementClassType) :
+                defaultTryGetJsxStatelessFunctionAttributesType(openingLikeElement, elementType, elemInstanceType, elementClassType);
+
+            if (statelessAttributesType) {
+                return statelessAttributesType;
             }
 
             // Issue an error if this return type isn't assignable to JSX.ElementClass
-            if (elemClassType) {
-                checkTypeRelatedTo(elemInstanceType, elemClassType, assignableRelation, node, Diagnostics.JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements);
+            if (elementClassType) {
+                checkTypeRelatedTo(elemInstanceType, elementClassType, assignableRelation, openingLikeElement, Diagnostics.JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements);
             }
 
             if (isTypeAny(elemInstanceType)) {
@@ -10696,11 +13996,6 @@ namespace ts {
                     // Props is of type 'any' or unknown
                     return attributesType;
                 }
-                else if (attributesType.flags & TypeFlags.Union) {
-                    // Props cannot be a union type
-                    error(node.tagName, Diagnostics.JSX_element_attributes_type_0_may_not_be_a_union_type, typeToString(attributesType));
-                    return anyType;
-                }
                 else {
                     // Normal case -- add in IntrinsicClassElements<T> and IntrinsicElements
                     let apparentAttributesType = attributesType;
@@ -10728,30 +14023,71 @@ namespace ts {
         }
 
         /**
-         * Given an opening/self-closing element, get the 'element attributes type', i.e. the type that tells
-         * us which attributes are valid on a given element.
+         * Get attributes type of the given intrinsic opening-like Jsx element by resolving the tag name.
+         * The function is intended to be called from a function which has checked that the opening element is an intrinsic element.
+         * @param node an intrinsic JSX opening-like element
          */
-        function getJsxElementAttributesType(node: JsxOpeningLikeElement): Type {
+        function getIntrinsicAttributesTypeFromJsxOpeningLikeElement(node: JsxOpeningLikeElement): Type {
+            Debug.assert(isJsxIntrinsicIdentifier(node.tagName));
             const links = getNodeLinks(node);
-            if (!links.resolvedJsxType) {
-                if (isJsxIntrinsicIdentifier(node.tagName)) {
-                    const symbol = getIntrinsicTagSymbol(node);
-                    if (links.jsxFlags & JsxFlags.IntrinsicNamedElement) {
-                        return links.resolvedJsxType = getTypeOfSymbol(symbol);
-                    }
-                    else if (links.jsxFlags & JsxFlags.IntrinsicIndexedElement) {
-                        return links.resolvedJsxType = getIndexInfoOfSymbol(symbol, IndexKind.String).type;
-                    }
-                    else {
-                        return links.resolvedJsxType = unknownType;
-                    }
+            if (!links.resolvedJsxElementAttributesType) {
+                const symbol = getIntrinsicTagSymbol(node);
+                if (links.jsxFlags & JsxFlags.IntrinsicNamedElement) {
+                    return links.resolvedJsxElementAttributesType = getTypeOfSymbol(symbol);
+                }
+                else if (links.jsxFlags & JsxFlags.IntrinsicIndexedElement) {
+                    return links.resolvedJsxElementAttributesType = getIndexInfoOfSymbol(symbol, IndexKind.String).type;
                 }
                 else {
-                    const elemClassType = getJsxGlobalElementClassType();
-                    return links.resolvedJsxType = getResolvedJsxType(node, undefined, elemClassType);
+                    return links.resolvedJsxElementAttributesType = unknownType;
                 }
             }
-            return links.resolvedJsxType;
+            return links.resolvedJsxElementAttributesType;
+        }
+
+        /**
+         * Get attributes type of the given custom opening-like JSX element.
+         * This function is intended to be called from a caller that handles intrinsic JSX element already.
+         * @param node a custom JSX opening-like element
+         * @param shouldIncludeAllStatelessAttributesType a boolean value used by language service to get all possible attributes type from an overload stateless function component
+         */
+        function getCustomJsxElementAttributesType(node: JsxOpeningLikeElement, shouldIncludeAllStatelessAttributesType: boolean): Type {
+            const links = getNodeLinks(node);
+            if (!links.resolvedJsxElementAttributesType) {
+                const elemClassType = getJsxGlobalElementClassType();
+                return links.resolvedJsxElementAttributesType = resolveCustomJsxElementAttributesType(node, shouldIncludeAllStatelessAttributesType, /*elementType*/ undefined, elemClassType);
+            }
+            return links.resolvedJsxElementAttributesType;
+        }
+
+        /**
+         * Get all possible attributes type, especially from an overload stateless function component, of the given JSX opening-like element.
+         * This function is called by language service (see: completions-tryGetGlobalSymbols).
+         * @param node a JSX opening-like element to get attributes type for
+         */
+        function getAllAttributesTypeFromJsxOpeningLikeElement(node: JsxOpeningLikeElement): Type {
+            if (isJsxIntrinsicIdentifier(node.tagName)) {
+                return getIntrinsicAttributesTypeFromJsxOpeningLikeElement(node);
+            }
+            else {
+                // Because in language service, the given JSX opening-like element may be incomplete and therefore,
+                // we can't resolve to exact signature if the element is a stateless function component so the best thing to do is return all attributes type from all overloads.
+                return getCustomJsxElementAttributesType(node, /*shouldIncludeAllStatelessAttributesType*/ true);
+            }
+        }
+
+        /**
+         * Get the attributes type, which indicates the attributes that are valid on the given JSXOpeningLikeElement.
+         * @param node a JSXOpeningLikeElement node
+         * @return an attributes type of the given node
+         */
+        function getAttributesTypeFromJsxOpeningLikeElement(node: JsxOpeningLikeElement): Type {
+            if (isJsxIntrinsicIdentifier(node.tagName)) {
+                return getIntrinsicAttributesTypeFromJsxOpeningLikeElement(node);
+            }
+            else {
+                return getCustomJsxElementAttributesType(node, /*shouldIncludeAllStatelessAttributesType*/ false);
+            }
         }
 
         /**
@@ -10760,19 +14096,38 @@ namespace ts {
          * that have no matching element attributes type property.
          */
         function getJsxAttributePropertySymbol(attrib: JsxAttribute): Symbol {
-            const attributesType = getJsxElementAttributesType(<JsxOpeningElement>attrib.parent);
+            const attributesType = getAttributesTypeFromJsxOpeningLikeElement(attrib.parent.parent as JsxOpeningElement);
             const prop = getPropertyOfType(attributesType, attrib.name.text);
             return prop || unknownSymbol;
         }
 
         function getJsxGlobalElementClassType(): Type {
-            if (!jsxElementClassType) {
-                jsxElementClassType = getExportedTypeFromNamespace(JsxNames.JSX, JsxNames.ElementClass);
+            if (!deferredJsxElementClassType) {
+                deferredJsxElementClassType = getExportedTypeFromNamespace(JsxNames.JSX, JsxNames.ElementClass);
+            }
+            return deferredJsxElementClassType;
+        }
+
+        function getJsxGlobalElementType(): Type {
+            if (!deferredJsxElementType) {
+                deferredJsxElementType = getExportedTypeFromNamespace(JsxNames.JSX, JsxNames.Element);
             }
-            return jsxElementClassType;
+            return deferredJsxElementType;
         }
 
-        /// Returns all the properties of the Jsx.IntrinsicElements interface
+        function getJsxGlobalStatelessElementType(): Type {
+            if (!deferredJsxStatelessElementType) {
+                const jsxElementType = getJsxGlobalElementType();
+                if (jsxElementType) {
+                    deferredJsxStatelessElementType = getUnionType([jsxElementType, nullType]);
+                }
+            }
+            return deferredJsxStatelessElementType;
+        }
+
+        /**
+         * Returns all the properties of the Jsx.IntrinsicElements interface
+         */
         function getJsxIntrinsicTagNames(): Symbol[] {
             const intrinsics = getJsxType(JsxNames.IntrinsicElements);
             return intrinsics ? getPropertiesOfType(intrinsics) : emptyArray;
@@ -10784,8 +14139,8 @@ namespace ts {
                 error(errorNode, Diagnostics.Cannot_use_JSX_unless_the_jsx_flag_is_provided);
             }
 
-            if (jsxElementType === undefined) {
-                if (compilerOptions.noImplicitAny) {
+            if (getJsxGlobalElementType() === undefined) {
+                if (noImplicitAny) {
                     error(errorNode, Diagnostics.JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist);
                 }
             }
@@ -10794,53 +14149,114 @@ namespace ts {
         function checkJsxOpeningLikeElement(node: JsxOpeningLikeElement) {
             checkGrammarJsxElement(node);
             checkJsxPreconditions(node);
-
-            // The reactNamespace symbol should be marked as 'used' so we don't incorrectly elide its import. And if there
-            // is no reactNamespace symbol in scope when targeting React emit, we should issue an error.
-            const reactRefErr = compilerOptions.jsx === JsxEmit.React ? Diagnostics.Cannot_find_name_0 : undefined;
-            const reactNamespace = compilerOptions.reactNamespace ? compilerOptions.reactNamespace : "React";
+            // The reactNamespace/jsxFactory's root symbol should be marked as 'used' so we don't incorrectly elide its import.
+            // And if there is no reactNamespace/jsxFactory's symbol in scope when targeting React emit, we should issue an error.
+            const reactRefErr = diagnostics && compilerOptions.jsx === JsxEmit.React ? Diagnostics.Cannot_find_name_0 : undefined;
+            const reactNamespace = getJsxNamespace();
             const reactSym = resolveName(node.tagName, reactNamespace, SymbolFlags.Value, reactRefErr, reactNamespace);
             if (reactSym) {
-                getSymbolLinks(reactSym).referenced = true;
+                // Mark local symbol as referenced here because it might not have been marked
+                // if jsx emit was not react as there wont be error being emitted
+                reactSym.isReferenced = true;
+
+                // If react symbol is alias, mark it as refereced
+                if (reactSym.flags & SymbolFlags.Alias && !isConstEnumOrConstEnumOnlyModule(resolveAlias(reactSym))) {
+                    markAliasSymbolAsReferenced(reactSym);
+                }
             }
 
-            const targetAttributesType = getJsxElementAttributesType(node);
+            checkJsxAttributesAssignableToTagNameAttributes(node);
+        }
 
-            const nameTable = createMap<boolean>();
-            // Process this array in right-to-left order so we know which
-            // attributes (mostly from spreads) are being overwritten and
-            // thus should have their types ignored
-            let sawSpreadedAny = false;
-            for (let i = node.attributes.length - 1; i >= 0; i--) {
-                if (node.attributes[i].kind === SyntaxKind.JsxAttribute) {
-                    checkJsxAttribute(<JsxAttribute>(node.attributes[i]), targetAttributesType, nameTable);
+        /**
+         * Check if a property with the given name is known anywhere in the given type. In an object type, a property
+         * is considered known if
+         * 1. the object type is empty and the check is for assignability, or
+         * 2. if the object type has index signatures, or
+         * 3. if the property is actually declared in the object type
+         *    (this means that 'toString', for example, is not usually a known property).
+         * 4. In a union or intersection type,
+         *    a property is considered known if it is known in any constituent type.
+         * @param targetType a type to search a given name in
+         * @param name a property name to search
+         * @param isComparingJsxAttributes a boolean flag indicating whether we are searching in JsxAttributesType
+         */
+        function isKnownProperty(targetType: Type, name: string, isComparingJsxAttributes: boolean): boolean {
+            if (targetType.flags & TypeFlags.Object) {
+                const resolved = resolveStructuredTypeMembers(<ObjectType>targetType);
+                if (resolved.stringIndexInfo ||
+                    resolved.numberIndexInfo && isNumericLiteralName(name) ||
+                    getPropertyOfObjectType(targetType, name) ||
+                    isComparingJsxAttributes && !isUnhyphenatedJsxName(name)) {
+                    // For JSXAttributes, if the attribute has a hyphenated name, consider that the attribute to be known.
+                    return true;
                 }
-                else {
-                    Debug.assert(node.attributes[i].kind === SyntaxKind.JsxSpreadAttribute);
-                    const spreadType = checkJsxSpreadAttribute(<JsxSpreadAttribute>(node.attributes[i]), targetAttributesType, nameTable);
-                    if (isTypeAny(spreadType)) {
-                        sawSpreadedAny = true;
+            }
+            else if (targetType.flags & TypeFlags.UnionOrIntersection) {
+                for (const t of (<UnionOrIntersectionType>targetType).types) {
+                    if (isKnownProperty(t, name, isComparingJsxAttributes)) {
+                        return true;
                     }
                 }
             }
+            return false;
+        }
 
-            // Check that all required properties have been provided. If an 'any'
-            // was spreaded in, though, assume that it provided all required properties
-            if (targetAttributesType && !sawSpreadedAny) {
-                const targetProperties = getPropertiesOfType(targetAttributesType);
-                for (let i = 0; i < targetProperties.length; i++) {
-                    if (!(targetProperties[i].flags & SymbolFlags.Optional) &&
-                        !nameTable[targetProperties[i].name]) {
+         /**
+          * Check whether the given attributes of JSX opening-like element is assignable to the tagName attributes.
+          *      Get the attributes type of the opening-like element through resolving the tagName, "target attributes"
+          *      Check assignablity between given attributes property, "source attributes", and the "target attributes"
+          * @param openingLikeElement an opening-like JSX element to check its JSXAttributes
+          */
+        function checkJsxAttributesAssignableToTagNameAttributes(openingLikeElement: JsxOpeningLikeElement) {
+            // The function involves following steps:
+            //      1. Figure out expected attributes type by resolving tagName of the JSX opening-like element, targetAttributesType.
+            //         During these steps, we will try to resolve the tagName as intrinsic name, stateless function, stateful component (in the order)
+            //      2. Solved JSX attributes type given by users, sourceAttributesType, which is by resolving "attributes" property of the JSX opening-like element.
+            //      3. Check if the two are assignable to each other
+
+            // targetAttributesType is a type of an attributes from resolving tagName of an opening-like JSX element.
+            const targetAttributesType = isJsxIntrinsicIdentifier(openingLikeElement.tagName) ?
+                getIntrinsicAttributesTypeFromJsxOpeningLikeElement(openingLikeElement) :
+                getCustomJsxElementAttributesType(openingLikeElement, /*shouldIncludeAllStatelessAttributesType*/ false);
+
+            // sourceAttributesType is a type of an attributes properties.
+            // i.e <div attr1={10} attr2="string" />
+            //     attr1 and attr2 are treated as JSXAttributes attached in the JsxOpeningLikeElement as "attributes".
+            const sourceAttributesType = createJsxAttributesTypeFromAttributesProperty(openingLikeElement,
+                attribute => {
+                    return isUnhyphenatedJsxName(attribute.name) || !!(getPropertyOfType(targetAttributesType, attribute.name));
+                });
 
-                        error(node, Diagnostics.Property_0_is_missing_in_type_1, targetProperties[i].name, typeToString(targetAttributesType));
+            // If the targetAttributesType is an emptyObjectType, indicating that there is no property named 'props' on this instance type.
+            // but there exists a sourceAttributesType, we need to explicitly give an error as normal assignability check allow excess properties and will pass.
+            if (targetAttributesType === emptyObjectType && (isTypeAny(sourceAttributesType) || (<ResolvedType>sourceAttributesType).properties.length > 0)) {
+                error(openingLikeElement, Diagnostics.JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property, getJsxElementPropertiesName());
+            }
+            else {
+                // Check if sourceAttributesType assignable to targetAttributesType though this check will allow excess properties
+                const isSourceAttributeTypeAssignableToTarget = checkTypeAssignableTo(sourceAttributesType, targetAttributesType, openingLikeElement.attributes.properties.length > 0 ? openingLikeElement.attributes : openingLikeElement);
+                // After we check for assignability, we will do another pass to check that all explicitly specified attributes have correct name corresponding in targetAttributeType.
+                // This will allow excess properties in spread type as it is very common pattern to spread outter attributes into React component in its render method.
+                if (isSourceAttributeTypeAssignableToTarget && !isTypeAny(sourceAttributesType) && !isTypeAny(targetAttributesType)) {
+                    for (const attribute of openingLikeElement.attributes.properties) {
+                        if (isJsxAttribute(attribute) && !isKnownProperty(targetAttributesType, attribute.name.text, /*isComparingJsxAttributes*/ true)) {
+                            error(attribute, Diagnostics.Property_0_does_not_exist_on_type_1, attribute.name.text, typeToString(targetAttributesType));
+                            // We break here so that errors won't be cascading
+                            break;
+                        }
                     }
                 }
             }
         }
 
-        function checkJsxExpression(node: JsxExpression) {
+        function checkJsxExpression(node: JsxExpression, checkMode?: CheckMode) {
             if (node.expression) {
-                return checkExpression(node.expression);
+                const type = checkExpression(node.expression, checkMode);
+                if (node.dotDotDotToken && type !== anyType && !isArrayType(type)) {
+                    error(node, Diagnostics.JSX_spread_child_must_be_an_array_type, node.toString(), typeToString(type));
+                }
+                return type;
             }
             else {
                 return unknownType;
@@ -10853,14 +14269,14 @@ namespace ts {
             return s.valueDeclaration ? s.valueDeclaration.kind : SyntaxKind.PropertyDeclaration;
         }
 
-        function getDeclarationModifierFlagsFromSymbol(s: Symbol): ModifierFlags {
-            return s.valueDeclaration ? getCombinedModifierFlags(s.valueDeclaration) : s.flags & SymbolFlags.Prototype ? ModifierFlags.Public | ModifierFlags.Static : 0;
-        }
-
         function getDeclarationNodeFlagsFromSymbol(s: Symbol): NodeFlags {
             return s.valueDeclaration ? getCombinedNodeFlags(s.valueDeclaration) : 0;
         }
 
+        function isMethodLike(symbol: Symbol) {
+            return !!(symbol.flags & SymbolFlags.Method || getCheckFlags(symbol) & CheckFlags.SyntheticMethod);
+        }
+
         /**
          * Check whether the requested property access is valid.
          * Returns true if node is a valid property access, and false otherwise.
@@ -10869,12 +14285,18 @@ namespace ts {
          * @param type The type of left.
          * @param prop The symbol for the right hand side of the property access.
          */
-        function checkClassPropertyAccess(node: PropertyAccessExpression | QualifiedName | VariableLikeDeclaration, left: Expression | QualifiedName, type: Type, prop: Symbol): boolean {
+        function checkPropertyAccessibility(node: PropertyAccessExpression | QualifiedName | VariableLikeDeclaration, left: Expression | QualifiedName, type: Type, prop: Symbol): boolean {
             const flags = getDeclarationModifierFlagsFromSymbol(prop);
-            const declaringClass = <InterfaceType>getDeclaredTypeOfSymbol(getParentOfSymbol(prop));
             const errorNode = node.kind === SyntaxKind.PropertyAccessExpression || node.kind === SyntaxKind.VariableDeclaration ?
                 (<PropertyAccessExpression | VariableDeclaration>node).name :
                 (<QualifiedName>node).right;
+
+            if (getCheckFlags(prop) & CheckFlags.ContainsPrivate) {
+                // Synthetic property with private constituent property
+                error(errorNode, Diagnostics.Property_0_has_conflicting_declarations_and_is_inaccessible_in_type_1, symbolToString(prop), typeToString(type));
+                return false;
+            }
+
             if (left.kind === SyntaxKind.SuperKeyword) {
                 // TS 1.0 spec (April 2014): 4.8.2
                 // - In a constructor, instance member function, instance member accessor, or
@@ -10883,21 +14305,22 @@ namespace ts {
                 // - In a static member function or static member accessor
                 //   where this references the constructor function object of a derived class,
                 //   a super property access is permitted and must specify a public static member function of the base class.
-                if (languageVersion < ScriptTarget.ES6 && getDeclarationKindFromSymbol(prop) !== SyntaxKind.MethodDeclaration) {
-                    // `prop` refers to a *property* declared in the super class
-                    // rather than a *method*, so it does not satisfy the above criteria.
-
-                    error(errorNode, Diagnostics.Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword);
-                    return false;
+                if (languageVersion < ScriptTarget.ES2015) {
+                    const hasNonMethodDeclaration = forEachProperty(prop, p => {
+                        const propKind = getDeclarationKindFromSymbol(p);
+                        return propKind !== SyntaxKind.MethodDeclaration && propKind !== SyntaxKind.MethodSignature;
+                    });
+                    if (hasNonMethodDeclaration) {
+                        error(errorNode, Diagnostics.Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword);
+                        return false;
+                    }
                 }
-
                 if (flags & ModifierFlags.Abstract) {
                     // A method cannot be accessed in a super property access if the method is abstract.
                     // This error could mask a private property access error. But, a member
                     // cannot simultaneously be private and abstract, so this will trigger an
                     // additional error elsewhere.
-
-                    error(errorNode, Diagnostics.Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression, symbolToString(prop), typeToString(declaringClass));
+                    error(errorNode, Diagnostics.Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression, symbolToString(prop), typeToString(getDeclaringClass(prop)));
                     return false;
                 }
             }
@@ -10913,7 +14336,7 @@ namespace ts {
             if (flags & ModifierFlags.Private) {
                 const declaringClassDeclaration = <ClassLikeDeclaration>getClassLikeDeclarationOfSymbol(getParentOfSymbol(prop));
                 if (!isNodeWithinClass(node, declaringClassDeclaration)) {
-                    error(errorNode, Diagnostics.Property_0_is_private_and_only_accessible_within_class_1, symbolToString(prop), typeToString(declaringClass));
+                    error(errorNode, Diagnostics.Property_0_is_private_and_only_accessible_within_class_1, symbolToString(prop), typeToString(getDeclaringClass(prop)));
                     return false;
                 }
                 return true;
@@ -10926,15 +14349,15 @@ namespace ts {
                 return true;
             }
 
-            // Get the enclosing class that has the declaring class as its base type
+            // Find the first enclosing class that has the declaring classes of the protected constituents
+            // of the property as base classes
             const enclosingClass = forEachEnclosingClass(node, enclosingDeclaration => {
                 const enclosingClass = <InterfaceType>getDeclaredTypeOfSymbol(getSymbolOfNode(enclosingDeclaration));
-                return hasBaseType(enclosingClass, declaringClass) ? enclosingClass : undefined;
+                return isClassDerivedFromDeclaringClasses(enclosingClass, prop) ? enclosingClass : undefined;
             });
-
             // A protected property is accessible if the property is within the declaring class or classes derived from it
             if (!enclosingClass) {
-                error(errorNode, Diagnostics.Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses, symbolToString(prop), typeToString(declaringClass));
+                error(errorNode, Diagnostics.Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses, symbolToString(prop), typeToString(getDeclaringClass(prop) || type));
                 return false;
             }
             // No further restrictions for static properties
@@ -10942,13 +14365,11 @@ namespace ts {
                 return true;
             }
             // An instance property must be accessed through an instance of the enclosing class
-            if (type.flags & TypeFlags.ThisType) {
+            if (type.flags & TypeFlags.TypeParameter && (type as TypeParameter).isThisType) {
                 // get the original type -- represented as the type constraint of the 'this' type
                 type = getConstraintOfTypeParameter(<TypeParameter>type);
             }
-
-            // TODO: why is the first part of this check here?
-            if (!(getTargetType(type).flags & (TypeFlags.Class | TypeFlags.Interface) && hasBaseType(<InterfaceType>type, enclosingClass))) {
+            if (!(getObjectFlags(getTargetType(type)) & ObjectFlags.ClassOrInterface && hasBaseType(type, enclosingClass))) {
                 error(errorNode, Diagnostics.Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1, symbolToString(prop), typeToString(enclosingClass));
                 return false;
             }
@@ -10956,16 +14377,18 @@ namespace ts {
         }
 
         function checkNonNullExpression(node: Expression | QualifiedName) {
-            const type = checkExpression(node);
-            if (strictNullChecks) {
-                const kind = getFalsyFlags(type) & TypeFlags.Nullable;
-                if (kind) {
-                    error(node, kind & TypeFlags.Undefined ? kind & TypeFlags.Null ?
-                        Diagnostics.Object_is_possibly_null_or_undefined :
-                        Diagnostics.Object_is_possibly_undefined :
-                        Diagnostics.Object_is_possibly_null);
-                }
-                return getNonNullableType(type);
+            return checkNonNullType(checkExpression(node), node);
+        }
+
+        function checkNonNullType(type: Type, errorNode: Node): Type {
+            const kind = (strictNullChecks ? getFalsyFlags(type) : type.flags) & TypeFlags.Nullable;
+            if (kind) {
+                error(errorNode, kind & TypeFlags.Undefined ? kind & TypeFlags.Null ?
+                    Diagnostics.Object_is_possibly_null_or_undefined :
+                    Diagnostics.Object_is_possibly_undefined :
+                    Diagnostics.Object_is_possibly_null);
+                const t = getNonNullableType(type);
+                return t.flags & (TypeFlags.Nullable | TypeFlags.Never) ? unknownType : t;
             }
             return type;
         }
@@ -10991,55 +14414,183 @@ namespace ts {
             }
             const prop = getPropertyOfType(apparentType, right.text);
             if (!prop) {
+                const stringIndexType = getIndexTypeOfType(apparentType, IndexKind.String);
+                if (stringIndexType) {
+                    return stringIndexType;
+                }
                 if (right.text && !checkAndReportErrorForExtendingInterface(node)) {
-                    reportNonexistentProperty(right, type.flags & TypeFlags.ThisType ? apparentType : type);
+                    reportNonexistentProperty(right, type.flags & TypeFlags.TypeParameter && (type as TypeParameter).isThisType ? apparentType : type);
                 }
                 return unknownType;
             }
-
-            if (noUnusedIdentifiers &&
-                (prop.flags & SymbolFlags.ClassMember) &&
-                prop.valueDeclaration && (getModifierFlags(prop.valueDeclaration) & ModifierFlags.Private)) {
-                if (prop.flags & SymbolFlags.Instantiated) {
-                    getSymbolLinks(prop).target.isReferenced = true;
-
+            if (prop.valueDeclaration) {
+                if (isInPropertyInitializer(node) &&
+                    !isBlockScopedNameDeclaredBeforeUse(prop.valueDeclaration, right)) {
+                    error(right, Diagnostics.Block_scoped_variable_0_used_before_its_declaration, right.text);
                 }
-                else {
-                    prop.isReferenced = true;
+                if (prop.valueDeclaration.kind === SyntaxKind.ClassDeclaration &&
+                    node.parent && node.parent.kind !== SyntaxKind.TypeReference &&
+                    !isInAmbientContext(prop.valueDeclaration) &&
+                    !isBlockScopedNameDeclaredBeforeUse(prop.valueDeclaration, right)) {
+                    error(right, Diagnostics.Class_0_used_before_its_declaration, right.text);
                 }
             }
 
+            markPropertyAsReferenced(prop);
+
             getNodeLinks(node).resolvedSymbol = prop;
 
-            if (prop.parent && prop.parent.flags & SymbolFlags.Class) {
-                checkClassPropertyAccess(node, left, apparentType, prop);
-            }
+            checkPropertyAccessibility(node, left, apparentType, prop);
 
-            const propType = getTypeOfSymbol(prop);
+            const propType = getDeclaredOrApparentType(prop, node);
+            const assignmentKind = getAssignmentTargetKind(node);
+
+            if (assignmentKind) {
+                if (isReferenceToReadonlyEntity(<Expression>node, prop) || isReferenceThroughNamespaceImport(<Expression>node)) {
+                    error(right, Diagnostics.Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property, right.text);
+                    return unknownType;
+                }
+            }
 
             // Only compute control flow type if this is a property access expression that isn't an
             // assignment target, and the referenced property was declared as a variable, property,
             // accessor, or optional method.
-            if (node.kind !== SyntaxKind.PropertyAccessExpression || isAssignmentTarget(node) ||
+            if (node.kind !== SyntaxKind.PropertyAccessExpression || assignmentKind === AssignmentKind.Definite ||
                 !(prop.flags & (SymbolFlags.Variable | SymbolFlags.Property | SymbolFlags.Accessor)) &&
                 !(prop.flags & SymbolFlags.Method && propType.flags & TypeFlags.Union)) {
                 return propType;
             }
-            return getFlowTypeOfReference(node, propType, /*assumeInitialized*/ true, /*flowContainer*/ undefined);
+            const flowType = getFlowTypeOfReference(node, propType);
+            return assignmentKind ? getBaseTypeOfLiteralType(flowType) : flowType;
+        }
+
+        function reportNonexistentProperty(propNode: Identifier, containingType: Type) {
+            let errorInfo: DiagnosticMessageChain;
+            if (containingType.flags & TypeFlags.Union && !(containingType.flags & TypeFlags.Primitive)) {
+                for (const subtype of (containingType as UnionType).types) {
+                    if (!getPropertyOfType(subtype, propNode.text)) {
+                        errorInfo = chainDiagnosticMessages(errorInfo, Diagnostics.Property_0_does_not_exist_on_type_1, declarationNameToString(propNode), typeToString(subtype));
+                        break;
+                    }
+                }
+            }
+            const suggestion = getSuggestionForNonexistentProperty(propNode, containingType);
+            if (suggestion) {
+                errorInfo = chainDiagnosticMessages(errorInfo, Diagnostics.Property_0_does_not_exist_on_type_1_Did_you_mean_2, declarationNameToString(propNode), typeToString(containingType), suggestion);
+            }
+            else {
+                errorInfo = chainDiagnosticMessages(errorInfo, Diagnostics.Property_0_does_not_exist_on_type_1, declarationNameToString(propNode), typeToString(containingType));
+            }
+            diagnostics.add(createDiagnosticForNodeFromMessageChain(propNode, errorInfo));
+        }
+
+        function getSuggestionForNonexistentProperty(node: Identifier, containingType: Type): string | undefined {
+            const suggestion = getSpellingSuggestionForName(node.text, getPropertiesOfObjectType(containingType), SymbolFlags.Value);
+            return suggestion && suggestion.name;
+        }
+
+        function getSuggestionForNonexistentSymbol(location: Node, name: string, meaning: SymbolFlags): string {
+            const result = resolveNameHelper(location, name, meaning, /*nameNotFoundMessage*/ undefined, name, (symbols, name, meaning) => {
+                const symbol = getSymbol(symbols, name, meaning);
+                if (symbol) {
+                    // Sometimes the symbol is found when location is a return type of a function: `typeof x` and `x` is declared in the body of the function
+                    // So the table *contains* `x` but `x` isn't actually in scope.
+                    // However, resolveNameHelper will continue and call this callback again, so we'll eventually get a correct suggestion.
+                    return symbol;
+                }
+                return getSpellingSuggestionForName(name, arrayFrom(symbols.values()), meaning);
+            });
+            if (result) {
+                return result.name;
+            }
+        }
+
+        /**
+         * Given a name and a list of symbols whose names are *not* equal to the name, return a spelling suggestion if there is one that is close enough.
+         * Names less than length 3 only check for case-insensitive equality, not levenshtein distance.
+         *
+         * If there is a candidate that's the same except for case, return that.
+         * If there is a candidate that's within one edit of the name, return that.
+         * Otherwise, return the candidate with the smallest Levenshtein distance,
+         *    except for candidates:
+         *      * With no name
+         *      * Whose meaning doesn't match the `meaning` parameter.
+         *      * Whose length differs from the target name by more than 0.3 of the length of the name.
+         *      * Whose levenshtein distance is more than 0.4 of the length of the name
+         *        (0.4 allows 1 substitution/transposition for every 5 characters,
+         *         and 1 insertion/deletion at 3 characters)
+         * Names longer than 30 characters don't get suggestions because Levenshtein distance is an n**2 algorithm.
+         */
+        function getSpellingSuggestionForName(name: string, symbols: Symbol[], meaning: SymbolFlags): Symbol | undefined {
+            const worstDistance = name.length * 0.4;
+            const maximumLengthDifference = Math.min(3, name.length * 0.34);
+            let bestDistance = Number.MAX_VALUE;
+            let bestCandidate = undefined;
+            let justCheckExactMatches = false;
+            if (name.length > 30) {
+                return undefined;
+            }
+            name = name.toLowerCase();
+            for (const candidate of symbols) {
+                if (candidate.flags & meaning &&
+                    candidate.name &&
+                    Math.abs(candidate.name.length - name.length) < maximumLengthDifference) {
+                    const candidateName = candidate.name.toLowerCase();
+                    if (candidateName === name) {
+                        return candidate;
+                    }
+                    if (justCheckExactMatches) {
+                        continue;
+                    }
+                    if (candidateName.length < 3 ||
+                        name.length < 3 ||
+                        candidateName === "eval" ||
+                        candidateName === "intl" ||
+                        candidateName === "undefined" ||
+                        candidateName === "map" ||
+                        candidateName === "nan" ||
+                        candidateName === "set") {
+                        continue;
+                    }
+                    const distance = levenshtein(name, candidateName);
+                    if (distance > worstDistance) {
+                        continue;
+                    }
+                    if (distance < 3) {
+                        justCheckExactMatches = true;
+                        bestCandidate = candidate;
+                    }
+                    else if (distance < bestDistance) {
+                        bestDistance = distance;
+                        bestCandidate = candidate;
+                    }
+                }
+            }
+            return bestCandidate;
+        }
+
+        function markPropertyAsReferenced(prop: Symbol) {
+            if (prop &&
+                noUnusedIdentifiers &&
+                (prop.flags & SymbolFlags.ClassMember) &&
+                prop.valueDeclaration && (getModifierFlags(prop.valueDeclaration) & ModifierFlags.Private)) {
+                if (getCheckFlags(prop) & CheckFlags.Instantiated) {
+                    getSymbolLinks(prop).target.isReferenced = true;
+                }
+                else {
+                    prop.isReferenced = true;
+                }
+            }
+        }
 
-            function reportNonexistentProperty(propNode: Identifier, containingType: Type) {
-                let errorInfo: DiagnosticMessageChain;
-                if (containingType.flags & TypeFlags.Union && !(containingType.flags & TypeFlags.Primitive)) {
-                    for (const subtype of (containingType as UnionType).types) {
-                        if (!getPropertyOfType(subtype, propNode.text)) {
-                            errorInfo = chainDiagnosticMessages(errorInfo, Diagnostics.Property_0_does_not_exist_on_type_1, declarationNameToString(propNode), typeToString(subtype));
-                            break;
-                        }
-                    }
+        function isInPropertyInitializer(node: Node): boolean {
+            while (node) {
+                if (node.parent && node.parent.kind === SyntaxKind.PropertyDeclaration && (node.parent as PropertyDeclaration).initializer === node) {
+                    return true;
                 }
-                errorInfo = chainDiagnosticMessages(errorInfo, Diagnostics.Property_0_does_not_exist_on_type_1, declarationNameToString(propNode), typeToString(containingType));
-                diagnostics.add(createDiagnosticForNodeFromMessageChain(propNode, errorInfo));
+                node = node.parent;
             }
+            return false;
         }
 
         function isValidPropertyAccess(node: PropertyAccessExpression | QualifiedName, propertyName: string): boolean {
@@ -11047,12 +14598,31 @@ namespace ts {
                 ? (<PropertyAccessExpression>node).expression
                 : (<QualifiedName>node).left;
 
-            const type = checkExpression(left);
+            return isValidPropertyAccessWithType(node, left, propertyName, getWidenedType(checkExpression(left)));
+        }
+
+        function isValidPropertyAccessWithType(
+            node: PropertyAccessExpression | QualifiedName,
+            left: LeftHandSideExpression | QualifiedName,
+            propertyName: string,
+            type: Type): boolean {
+
             if (type !== unknownType && !isTypeAny(type)) {
-                const prop = getPropertyOfType(getWidenedType(type), propertyName);
-                if (prop && prop.parent && prop.parent.flags & SymbolFlags.Class) {
-                    return checkClassPropertyAccess(node, left, type, prop);
+                const prop = getPropertyOfType(type, propertyName);
+                if (prop) {
+                    return checkPropertyAccessibility(node, left, type, prop);
+                }
+
+                // In js files properties of unions are allowed in completion
+                if (isInJavaScriptFile(left) && (type.flags & TypeFlags.Union)) {
+                    for (const elementType of (<UnionType>type).types) {
+                        if (isValidPropertyAccessWithType(node, left, propertyName, elementType)) {
+                            return true;
+                        }
+                    }
                 }
+
+                return false;
             }
             return true;
         }
@@ -11086,7 +14656,7 @@ namespace ts {
          * that references a for-in variable for an object with numeric property names.
          */
         function isForInVariableForNumericPropertyNames(expr: Expression) {
-            const e = skipParenthesizedNodes(expr);
+            const e = skipParentheses(expr);
             if (e.kind === SyntaxKind.Identifier) {
                 const symbol = getResolvedSymbol(<Identifier>e);
                 if (symbol.flags & SymbolFlags.Variable) {
@@ -11096,7 +14666,7 @@ namespace ts {
                         if (node.kind === SyntaxKind.ForInStatement &&
                             child === (<ForInStatement>node).statement &&
                             getForInVariableSymbol(<ForInStatement>node) === symbol &&
-                            hasNumericPropertyNames(checkExpression((<ForInStatement>node).expression))) {
+                            hasNumericPropertyNames(getTypeOfExpression((<ForInStatement>node).expression))) {
                             return true;
                         }
                         child = node;
@@ -11108,8 +14678,10 @@ namespace ts {
         }
 
         function checkIndexedAccess(node: ElementAccessExpression): Type {
-            // Grammar checking
-            if (!node.argumentExpression) {
+            const objectType = checkNonNullExpression(node.expression);
+
+            const indexExpression = node.argumentExpression;
+            if (!indexExpression) {
                 const sourceFile = getSourceFileOfNode(node);
                 if (node.parent.kind === SyntaxKind.NewExpression && (<NewExpression>node.parent).expression === node) {
                     const start = skipTrivia(sourceFile.text, node.expression.end);
@@ -11121,116 +14693,23 @@ namespace ts {
                     const end = node.end;
                     grammarErrorAtPos(sourceFile, start, end - start, Diagnostics.Expression_expected);
                 }
+                return unknownType;
             }
 
-            // Obtain base constraint such that we can bail out if the constraint is an unknown type
-            const objectType = getApparentType(checkNonNullExpression(node.expression));
-            const indexType = node.argumentExpression ? checkExpression(node.argumentExpression) : unknownType;
+            const indexType = isForInVariableForNumericPropertyNames(indexExpression) ? numberType : checkExpression(indexExpression);
 
             if (objectType === unknownType || objectType === silentNeverType) {
                 return objectType;
             }
 
-            const isConstEnum = isConstEnumObjectType(objectType);
-            if (isConstEnum &&
-                (!node.argumentExpression || node.argumentExpression.kind !== SyntaxKind.StringLiteral)) {
-                error(node.argumentExpression, Diagnostics.A_const_enum_member_can_only_be_accessed_using_a_string_literal);
+            if (isConstEnumObjectType(objectType) && indexExpression.kind !== SyntaxKind.StringLiteral) {
+                error(indexExpression, Diagnostics.A_const_enum_member_can_only_be_accessed_using_a_string_literal);
                 return unknownType;
             }
 
-            // TypeScript 1.0 spec (April 2014): 4.10 Property Access
-            // - If IndexExpr is a string literal or a numeric literal and ObjExpr's apparent type has a property with the name
-            //    given by that literal(converted to its string representation in the case of a numeric literal), the property access is of the type of that property.
-            // - Otherwise, if ObjExpr's apparent type has a numeric index signature and IndexExpr is of type Any, the Number primitive type, or an enum type,
-            //    the property access is of the type of that index signature.
-            // - Otherwise, if ObjExpr's apparent type has a string index signature and IndexExpr is of type Any, the String or Number primitive type, or an enum type,
-            //    the property access is of the type of that index signature.
-            // - Otherwise, if IndexExpr is of type Any, the String or Number primitive type, or an enum type, the property access is of type Any.
-
-            // See if we can index as a property.
-            if (node.argumentExpression) {
-                const name = getPropertyNameForIndexedAccess(node.argumentExpression, indexType);
-                if (name !== undefined) {
-                    const prop = getPropertyOfType(objectType, name);
-                    if (prop) {
-                        getNodeLinks(node).resolvedSymbol = prop;
-                        return getTypeOfSymbol(prop);
-                    }
-                    else if (isConstEnum) {
-                        error(node.argumentExpression, Diagnostics.Property_0_does_not_exist_on_const_enum_1, name, symbolToString(objectType.symbol));
-                        return unknownType;
-                    }
-                }
-            }
-
-            // Check for compatible indexer types.
-            const allowedNullableFlags = strictNullChecks ? 0 : TypeFlags.Nullable;
-            if (isTypeAnyOrAllConstituentTypesHaveKind(indexType, TypeFlags.StringLike | TypeFlags.NumberLike | TypeFlags.ESSymbol | allowedNullableFlags)) {
-
-                // Try to use a number indexer.
-                if (isTypeAnyOrAllConstituentTypesHaveKind(indexType, TypeFlags.NumberLike | allowedNullableFlags) || isForInVariableForNumericPropertyNames(node.argumentExpression)) {
-                    const numberIndexInfo = getIndexInfoOfType(objectType, IndexKind.Number);
-                    if (numberIndexInfo) {
-                        getNodeLinks(node).resolvedIndexInfo = numberIndexInfo;
-                        return numberIndexInfo.type;
-                    }
-                }
-
-                // Try to use string indexing.
-                const stringIndexInfo = getIndexInfoOfType(objectType, IndexKind.String);
-                if (stringIndexInfo) {
-                    getNodeLinks(node).resolvedIndexInfo = stringIndexInfo;
-                    return stringIndexInfo.type;
-                }
-
-                // Fall back to any.
-                if (compilerOptions.noImplicitAny && !compilerOptions.suppressImplicitAnyIndexErrors && !isTypeAny(objectType)) {
-                    error(node, getIndexTypeOfType(objectType, IndexKind.Number) ?
-                        Diagnostics.Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number :
-                        Diagnostics.Index_signature_of_object_type_implicitly_has_an_any_type);
-                }
-
-                return anyType;
-            }
-
-            // REVIEW: Users should know the type that was actually used.
-            error(node, Diagnostics.An_index_expression_argument_must_be_of_type_string_number_symbol_or_any);
-
-            return unknownType;
-        }
-
-        /**
-         * If indexArgumentExpression is a string literal or number literal, returns its text.
-         * If indexArgumentExpression is a constant value, returns its string value.
-         * If indexArgumentExpression is a well known symbol, returns the property name corresponding
-         *    to this symbol, as long as it is a proper symbol reference.
-         * Otherwise, returns undefined.
-         */
-        function getPropertyNameForIndexedAccess(indexArgumentExpression: Expression, indexArgumentType: Type): string {
-            if (indexArgumentExpression.kind === SyntaxKind.StringLiteral || indexArgumentExpression.kind === SyntaxKind.NumericLiteral) {
-                return (<LiteralExpression>indexArgumentExpression).text;
-            }
-            if (indexArgumentExpression.kind === SyntaxKind.ElementAccessExpression || indexArgumentExpression.kind === SyntaxKind.PropertyAccessExpression) {
-                const value = getConstantValue(<ElementAccessExpression | PropertyAccessExpression>indexArgumentExpression);
-                if (value !== undefined) {
-                    return value.toString();
-                }
-            }
-            if (checkThatExpressionIsProperSymbolReference(indexArgumentExpression, indexArgumentType, /*reportError*/ false)) {
-                const rightHandSideName = (<Identifier>(<PropertyAccessExpression>indexArgumentExpression).name).text;
-                return getPropertyNameForKnownSymbolName(rightHandSideName);
-            }
-
-            return undefined;
+            return checkIndexedAccessIndexType(getIndexedAccessType(objectType, indexType, node), node);
         }
 
-        /**
-         * A proper symbol reference requires the following:
-         *   1. The property access denotes a property that exists
-         *   2. The expression is of the form Symbol.<identifier>
-         *   3. The property access is of the primitive type symbol.
-         *   4. Symbol in this context resolves to the global Symbol object
-         */
         function checkThatExpressionIsProperSymbolReference(expression: Expression, expressionType: Type, reportError: boolean): boolean {
             if (expressionType === unknownType) {
                 // There is already an error, so no need to report one.
@@ -11257,7 +14736,7 @@ namespace ts {
                 return false;
             }
 
-            const globalESSymbol = getGlobalESSymbolConstructorSymbol();
+            const globalESSymbol = getGlobalESSymbolConstructorSymbol(/*reportErrors*/ true);
             if (!globalESSymbol) {
                 // Already errored when we tried to look up the symbol
                 return false;
@@ -11273,7 +14752,18 @@ namespace ts {
             return true;
         }
 
+        function callLikeExpressionMayHaveTypeArguments(node: CallLikeExpression): node is CallExpression | NewExpression {
+            // TODO: Also include tagged templates (https://github.com/Microsoft/TypeScript/issues/11947)
+            return isCallOrNewExpression(node);
+        }
+
         function resolveUntypedCall(node: CallLikeExpression): Signature {
+            if (callLikeExpressionMayHaveTypeArguments(node)) {
+                // Check type arguments even though we will give an error that untyped calls may not accept type arguments.
+                // This gets us diagnostics for the type arguments and marks them as referenced.
+                forEach(node.typeArguments, checkSourceElement);
+            }
+
             if (node.kind === SyntaxKind.TaggedTemplateExpression) {
                 checkExpression((<TaggedTemplateExpression>node).template);
             }
@@ -11347,7 +14837,7 @@ namespace ts {
         function getSpreadArgumentIndex(args: Expression[]): number {
             for (let i = 0; i < args.length; i++) {
                 const arg = args[i];
-                if (arg && arg.kind === SyntaxKind.SpreadElementExpression) {
+                if (arg && arg.kind === SyntaxKind.SpreadElement) {
                     return i;
                 }
             }
@@ -11361,6 +14851,11 @@ namespace ts {
             let isDecorator: boolean;
             let spreadArgIndex = -1;
 
+            if (isJsxOpeningLikeElement(node)) {
+                // The arity check will be done in "checkApplicableSignatureForJsxOpeningLikeElement".
+                return true;
+            }
+
             if (node.kind === SyntaxKind.TaggedTemplateExpression) {
                 const tagExpression = <TaggedTemplateExpression>node;
 
@@ -11392,7 +14887,7 @@ namespace ts {
                 argCount = getEffectiveArgumentCount(node, /*args*/ undefined, signature);
             }
             else {
-                const callExpression = <CallExpression>node;
+                const callExpression = <CallExpression | NewExpression>node;
                 if (!callExpression.arguments) {
                     // This only happens when we have something of the form: 'new C'
                     Debug.assert(callExpression.kind === SyntaxKind.NewExpression);
@@ -11402,8 +14897,8 @@ namespace ts {
 
                 argCount = signatureHelpTrailingComma ? args.length + 1 : args.length;
 
-                // If we are missing the close paren, the call is incomplete.
-                callIsIncomplete = (<CallExpression>callExpression).arguments.end === callExpression.end;
+                // If we are missing the close parenthesis, the call is incomplete.
+                callIsIncomplete = callExpression.arguments.end === callExpression.end;
 
                 typeArguments = callExpression.typeArguments;
                 spreadArgIndex = getSpreadArgumentIndex(args);
@@ -11411,8 +14906,10 @@ namespace ts {
 
             // If the user supplied type arguments, but the number of type arguments does not match
             // the declared number of type parameters, the call has an incorrect arity.
+            const numTypeParameters = length(signature.typeParameters);
+            const minTypeArgumentCount = getMinTypeArgumentCount(signature.typeParameters);
             const hasRightNumberOfTypeArgs = !typeArguments ||
-                (signature.typeParameters && typeArguments.length === signature.typeParameters.length);
+                (typeArguments.length >= minTypeArgumentCount && typeArguments.length <= numTypeParameters);
             if (!hasRightNumberOfTypeArgs) {
                 return false;
             }
@@ -11420,7 +14917,7 @@ namespace ts {
             // If spread arguments are present, check that they correspond to a rest parameter. If so, no
             // further checking is necessary.
             if (spreadArgIndex >= 0) {
-                return isRestParameterIndex(signature, spreadArgIndex);
+                return isRestParameterIndex(signature, spreadArgIndex) || spreadArgIndex >= signature.minArgumentCount;
             }
 
             // Too many arguments implies incorrect arity.
@@ -11435,7 +14932,7 @@ namespace ts {
 
         // If type has a single call signature and no other members, return that signature. Otherwise, return undefined.
         function getSingleCallSignature(type: Type): Signature {
-            if (type.flags & TypeFlags.ObjectType) {
+            if (type.flags & TypeFlags.Object) {
                 const resolved = resolveStructuredTypeMembers(<ObjectType>type);
                 if (resolved.callSignatures.length === 1 && resolved.constructSignatures.length === 0 &&
                     resolved.properties.length === 0 && !resolved.stringIndexInfo && !resolved.numberIndexInfo) {
@@ -11446,46 +14943,65 @@ namespace ts {
         }
 
         // Instantiate a generic signature in the context of a non-generic signature (section 3.8.5 in TypeScript spec)
-        function instantiateSignatureInContextOf(signature: Signature, contextualSignature: Signature, contextualMapper: TypeMapper): Signature {
-            const context = createInferenceContext(signature, /*inferUnionTypes*/ true);
+        function instantiateSignatureInContextOf(signature: Signature, contextualSignature: Signature, contextualMapper?: TypeMapper): Signature {
+            const context = createInferenceContext(signature, InferenceFlags.InferUnionTypes);
             forEachMatchingParameterType(contextualSignature, signature, (source, target) => {
                 // Type parameters from outer context referenced by source type are fixed by instantiation of the source type
-                inferTypes(context, instantiateType(source, contextualMapper), target);
+                inferTypes(context.inferences, instantiateType(source, contextualMapper || identityMapper), target);
             });
+            if (!contextualMapper) {
+                inferTypes(context.inferences, getReturnTypeOfSignature(contextualSignature), getReturnTypeOfSignature(signature), InferencePriority.ReturnType);
+            }
             return getSignatureInstantiation(signature, getInferredTypes(context));
         }
 
-        function inferTypeArguments(node: CallLikeExpression, signature: Signature, args: Expression[], excludeArgument: boolean[], context: InferenceContext): void {
-            const typeParameters = signature.typeParameters;
-            const inferenceMapper = getInferenceMapper(context);
+        function inferTypeArguments(node: CallLikeExpression, signature: Signature, args: Expression[], excludeArgument: boolean[], context: InferenceContext): Type[] {
+            const inferences = context.inferences;
 
             // Clear out all the inference results from the last time inferTypeArguments was called on this context
-            for (let i = 0; i < typeParameters.length; i++) {
+            for (let i = 0; i < inferences.length; i++) {
                 // As an optimization, we don't have to clear (and later recompute) inferred types
                 // for type parameters that have already been fixed on the previous call to inferTypeArguments.
                 // It would be just as correct to reset all of them. But then we'd be repeating the same work
                 // for the type parameters that were fixed, namely the work done by getInferredType.
-                if (!context.inferences[i].isFixed) {
-                    context.inferredTypes[i] = undefined;
+                if (!inferences[i].isFixed) {
+                    inferences[i].inferredType = undefined;
+                }
+            }
+
+            // If a contextual type is available, infer from that type to the return type of the call expression. For
+            // example, given a 'function wrap<T, U>(cb: (x: T) => U): (x: T) => U' and a call expression
+            // 'let f: (x: string) => number = wrap(s => s.length)', we infer from the declared type of 'f' to the
+            // return type of 'wrap'.
+            if (isExpression(node)) {
+                const contextualType = getContextualType(node);
+                if (contextualType) {
+                    // We clone the contextual mapper to avoid disturbing a resolution in progress for an
+                    // outer call expression. Effectively we just want a snapshot of whatever has been
+                    // inferred for any outer call expression so far.
+                    const instantiatedType = instantiateType(contextualType, cloneTypeMapper(getContextualMapper(node)));
+                    // If the contextual type is a generic function type with a single call signature, we
+                    // instantiate the type with its own type parameters and type arguments. This ensures that
+                    // the type parameters are not erased to type any during type inference such that they can
+                    // be inferred as actual types from the contextual type. For example:
+                    //   declare function arrayMap<T, U>(f: (x: T) => U): (a: T[]) => U[];
+                    //   const boxElements: <A>(a: A[]) => { value: A }[] = arrayMap(value => ({ value }));
+                    // Above, the type of the 'value' parameter is inferred to be 'A'.
+                    const contextualSignature = getSingleCallSignature(instantiatedType);
+                    const inferenceSourceType = contextualSignature && contextualSignature.typeParameters ?
+                        getOrCreateTypeFromSignature(getSignatureInstantiation(contextualSignature, contextualSignature.typeParameters)) :
+                        instantiatedType;
+                    const inferenceTargetType = getReturnTypeOfSignature(signature);
+                     // Inferences made from return types have lower priority than all other inferences.
+                    inferTypes(context.inferences, inferenceSourceType, inferenceTargetType, InferencePriority.ReturnType);
                 }
             }
 
-            // On this call to inferTypeArguments, we may get more inferences for certain type parameters that were not
-            // fixed last time. This means that a type parameter that failed inference last time may succeed this time,
-            // or vice versa. Therefore, the failedTypeParameterIndex is useless if it points to an unfixed type parameter,
-            // because it may change. So here we reset it. However, getInferredType will not revisit any type parameters
-            // that were previously fixed. So if a fixed type parameter failed previously, it will fail again because
-            // it will contain the exact same set of inferences. So if we reset the index from a fixed type parameter,
-            // we will lose information that we won't recover this time around.
-            if (context.failedTypeParameterIndex !== undefined && !context.inferences[context.failedTypeParameterIndex].isFixed) {
-                context.failedTypeParameterIndex = undefined;
-            }
-
             const thisType = getThisTypeOfSignature(signature);
             if (thisType) {
                 const thisArgumentNode = getThisArgumentOfCall(node);
                 const thisArgumentType = thisArgumentNode ? checkExpression(thisArgumentNode) : voidType;
-                inferTypes(context, thisArgumentType, thisType);
+                inferTypes(context.inferences, thisArgumentType, thisType);
             }
 
             // We perform two passes over the arguments. In the first pass we infer from all arguments, but use
@@ -11496,18 +15012,18 @@ namespace ts {
                 // If the effective argument is 'undefined', then it is an argument that is present but is synthetic.
                 if (arg === undefined || arg.kind !== SyntaxKind.OmittedExpression) {
                     const paramType = getTypeAtPosition(signature, i);
-                    let argType = getEffectiveArgumentType(node, i, arg);
+                    let argType = getEffectiveArgumentType(node, i);
 
                     // If the effective argument type is 'undefined', there is no synthetic type
                     // for the argument. In that case, we should check the argument.
                     if (argType === undefined) {
                         // For context sensitive arguments we pass the identityMapper, which is a signal to treat all
                         // context sensitive function expressions as wildcards
-                        const mapper = excludeArgument && excludeArgument[i] !== undefined ? identityMapper : inferenceMapper;
+                        const mapper = excludeArgument && excludeArgument[i] !== undefined ? identityMapper : context;
                         argType = checkExpressionWithContextualType(arg, paramType, mapper);
                     }
 
-                    inferTypes(context, argType, paramType);
+                    inferTypes(context.inferences, argType, paramType);
                 }
             }
 
@@ -11522,19 +15038,18 @@ namespace ts {
                     if (excludeArgument[i] === false) {
                         const arg = args[i];
                         const paramType = getTypeAtPosition(signature, i);
-                        inferTypes(context, checkExpressionWithContextualType(arg, paramType, inferenceMapper), paramType);
+                        inferTypes(context.inferences, checkExpressionWithContextualType(arg, paramType, context), paramType);
                     }
                 }
             }
-
-            getInferredTypes(context);
+            return getInferredTypes(context);
         }
 
         function checkTypeArguments(signature: Signature, typeArgumentNodes: TypeNode[], typeArgumentTypes: Type[], reportErrors: boolean, headMessage?: DiagnosticMessage): boolean {
             const typeParameters = signature.typeParameters;
             let typeArgumentsAreAssignable = true;
             let mapper: TypeMapper;
-            for (let i = 0; i < typeParameters.length; i++) {
+            for (let i = 0; i < typeArgumentNodes.length; i++) {
                 if (typeArgumentsAreAssignable /* so far */) {
                     const constraint = getConstraintOfTypeParameter(typeParameters[i]);
                     if (constraint) {
@@ -11560,7 +15075,44 @@ namespace ts {
             return typeArgumentsAreAssignable;
         }
 
+        /**
+         * Check if the given signature can possibly be a signature called by the JSX opening-like element.
+         * @param node a JSX opening-like element we are trying to figure its call signature
+         * @param signature a candidate signature we are trying whether it is a call signature
+         * @param relation a relationship to check parameter and argument type
+         * @param excludeArgument
+         */
+        function checkApplicableSignatureForJsxOpeningLikeElement(node: JsxOpeningLikeElement, signature: Signature, relation: Map<RelationComparisonResult>) {
+            // JSX opening-like element has correct arity for stateless-function component if the one of the following condition is true:
+            //      1. callIsIncomplete
+            //      2. attributes property has same number of properties as the parameter object type.
+            //         We can figure that out by resolving attributes property and check number of properties in the resolved type
+            // If the call has correct arity, we will then check if the argument type and parameter type is assignable
+
+            const callIsIncomplete = node.attributes.end === node.end;  // If we are missing the close "/>", the call is incomplete
+            if (callIsIncomplete) {
+                return true;
+            }
+
+            const headMessage = Diagnostics.Argument_of_type_0_is_not_assignable_to_parameter_of_type_1;
+            // Stateless function components can have maximum of three arguments: "props", "context", and "updater".
+            // However "context" and "updater" are implicit and can't be specify by users. Only the first parameter, props,
+            // can be specified by users through attributes property.
+            const paramType = getTypeAtPosition(signature, 0);
+            const attributesType = checkExpressionWithContextualType(node.attributes, paramType, /*contextualMapper*/ undefined);
+            const argProperties = getPropertiesOfType(attributesType);
+            for (const arg of argProperties) {
+                if (!getPropertyOfType(paramType, arg.name) && isUnhyphenatedJsxName(arg.name)) {
+                    return false;
+                }
+            }
+            return checkTypeRelatedTo(attributesType, paramType, relation, /*errorNode*/ undefined, headMessage);
+        }
+
         function checkApplicableSignature(node: CallLikeExpression, args: Expression[], signature: Signature, relation: Map<RelationComparisonResult>, excludeArgument: boolean[], reportErrors: boolean) {
+            if (isJsxOpeningLikeElement(node)) {
+                return checkApplicableSignatureForJsxOpeningLikeElement(<JsxOpeningLikeElement>node, signature, relation);
+            }
             const thisType = getThisTypeOfSignature(signature);
             if (thisType && thisType !== voidType && node.kind !== SyntaxKind.NewExpression) {
                 // If the called expression is not of the form `x.f` or `x["f"]`, then sourceType = voidType
@@ -11582,7 +15134,7 @@ namespace ts {
                 if (arg === undefined || arg.kind !== SyntaxKind.OmittedExpression) {
                     // Check spread elements against rest type (from arity check we know spread argument corresponds to a rest parameter)
                     const paramType = getTypeAtPosition(signature, i);
-                    let argType = getEffectiveArgumentType(node, i, arg);
+                    let argType = getEffectiveArgumentType(node, i);
 
                     // If the effective argument type is 'undefined', there is no synthetic type
                     // for the argument. In that case, we should check the argument.
@@ -11642,8 +15194,11 @@ namespace ts {
                 // `getEffectiveArgumentCount` and `getEffectiveArgumentType` below.
                 return undefined;
             }
+            else if (isJsxOpeningLikeElement(node)) {
+                args = node.attributes.properties.length > 0 ? [node.attributes] : emptyArray;
+            }
             else {
-                args = (<CallExpression>node).arguments || emptyArray;
+                args = node.arguments || emptyArray;
             }
 
             return args;
@@ -11651,18 +15206,18 @@ namespace ts {
 
 
         /**
-          * Returns the effective argument count for a node that works like a function invocation.
-          * If 'node' is a Decorator, the number of arguments is derived from the decoration
-          *    target and the signature:
-          *    If 'node.target' is a class declaration or class expression, the effective argument
-          *       count is 1.
-          *    If 'node.target' is a parameter declaration, the effective argument count is 3.
-          *    If 'node.target' is a property declaration, the effective argument count is 2.
-          *    If 'node.target' is a method or accessor declaration, the effective argument count
-          *       is 3, although it can be 2 if the signature only accepts two arguments, allowing
-          *       us to match a property decorator.
-          * Otherwise, the argument count is the length of the 'args' array.
-          */
+         * Returns the effective argument count for a node that works like a function invocation.
+         * If 'node' is a Decorator, the number of arguments is derived from the decoration
+         *    target and the signature:
+         *    If 'node.target' is a class declaration or class expression, the effective argument
+         *       count is 1.
+         *    If 'node.target' is a parameter declaration, the effective argument count is 3.
+         *    If 'node.target' is a property declaration, the effective argument count is 2.
+         *    If 'node.target' is a method or accessor declaration, the effective argument count
+         *       is 3, although it can be 2 if the signature only accepts two arguments, allowing
+         *       us to match a property decorator.
+         * Otherwise, the argument count is the length of the 'args' array.
+         */
         function getEffectiveArgumentCount(node: CallLikeExpression, args: Expression[], signature: Signature) {
             if (node.kind === SyntaxKind.Decorator) {
                 switch (node.parent.kind) {
@@ -11704,17 +15259,17 @@ namespace ts {
         }
 
         /**
-          * Returns the effective type of the first argument to a decorator.
-          * If 'node' is a class declaration or class expression, the effective argument type
-          *    is the type of the static side of the class.
-          * If 'node' is a parameter declaration, the effective argument type is either the type
-          *    of the static or instance side of the class for the parameter's parent method,
-          *    depending on whether the method is declared static.
-          *    For a constructor, the type is always the type of the static side of the class.
-          * If 'node' is a property, method, or accessor declaration, the effective argument
-          *    type is the type of the static or instance side of the parent class for class
-          *    element, depending on whether the element is declared static.
-          */
+         * Returns the effective type of the first argument to a decorator.
+         * If 'node' is a class declaration or class expression, the effective argument type
+         *    is the type of the static side of the class.
+         * If 'node' is a parameter declaration, the effective argument type is either the type
+         *    of the static or instance side of the class for the parameter's parent method,
+         *    depending on whether the method is declared static.
+         *    For a constructor, the type is always the type of the static side of the class.
+         * If 'node' is a property, method, or accessor declaration, the effective argument
+         *    type is the type of the static or instance side of the parent class for class
+         *    element, depending on whether the element is declared static.
+         */
         function getEffectiveDecoratorFirstArgumentType(node: Node): Type {
             // The first argument to a decorator is its `target`.
             if (node.kind === SyntaxKind.ClassDeclaration) {
@@ -11750,20 +15305,20 @@ namespace ts {
         }
 
         /**
-          * Returns the effective type for the second argument to a decorator.
-          * If 'node' is a parameter, its effective argument type is one of the following:
-          *    If 'node.parent' is a constructor, the effective argument type is 'any', as we
-          *       will emit `undefined`.
-          *    If 'node.parent' is a member with an identifier, numeric, or string literal name,
-          *       the effective argument type will be a string literal type for the member name.
-          *    If 'node.parent' is a computed property name, the effective argument type will
-          *       either be a symbol type or the string type.
-          * If 'node' is a member with an identifier, numeric, or string literal name, the
-          *    effective argument type will be a string literal type for the member name.
-          * If 'node' is a computed property name, the effective argument type will either
-          *    be a symbol type or the string type.
-          * A class decorator does not have a second argument type.
-          */
+         * Returns the effective type for the second argument to a decorator.
+         * If 'node' is a parameter, its effective argument type is one of the following:
+         *    If 'node.parent' is a constructor, the effective argument type is 'any', as we
+         *       will emit `undefined`.
+         *    If 'node.parent' is a member with an identifier, numeric, or string literal name,
+         *       the effective argument type will be a string literal type for the member name.
+         *    If 'node.parent' is a computed property name, the effective argument type will
+         *       either be a symbol type or the string type.
+         * If 'node' is a member with an identifier, numeric, or string literal name, the
+         *    effective argument type will be a string literal type for the member name.
+         * If 'node' is a computed property name, the effective argument type will either
+         *    be a symbol type or the string type.
+         * A class decorator does not have a second argument type.
+         */
         function getEffectiveDecoratorSecondArgumentType(node: Node) {
             // The second argument to a decorator is its `propertyKey`
             if (node.kind === SyntaxKind.ClassDeclaration) {
@@ -11795,7 +15350,7 @@ namespace ts {
                     case SyntaxKind.Identifier:
                     case SyntaxKind.NumericLiteral:
                     case SyntaxKind.StringLiteral:
-                        return getLiteralTypeForText(TypeFlags.StringLiteral, (<Identifier | LiteralExpression>element.name).text);
+                        return getLiteralType((<Identifier | LiteralExpression>element.name).text);
 
                     case SyntaxKind.ComputedPropertyName:
                         const nameType = checkComputedPropertyName(<ComputedPropertyName>element.name);
@@ -11817,12 +15372,12 @@ namespace ts {
         }
 
         /**
-          * Returns the effective argument type for the third argument to a decorator.
-          * If 'node' is a parameter, the effective argument type is the number type.
-          * If 'node' is a method or accessor, the effective argument type is a
-          *    `TypedPropertyDescriptor<T>` instantiated with the type of the member.
-          * Class and property decorators do not have a third effective argument.
-          */
+         * Returns the effective argument type for the third argument to a decorator.
+         * If 'node' is a parameter, the effective argument type is the number type.
+         * If 'node' is a method or accessor, the effective argument type is a
+         *    `TypedPropertyDescriptor<T>` instantiated with the type of the member.
+         * Class and property decorators do not have a third effective argument.
+         */
         function getEffectiveDecoratorThirdArgumentType(node: Node) {
             // The third argument to a decorator is either its `descriptor` for a method decorator
             // or its `parameterIndex` for a parameter decorator
@@ -11855,8 +15410,8 @@ namespace ts {
         }
 
         /**
-          * Returns the effective argument type for the provided argument to a decorator.
-          */
+         * Returns the effective argument type for the provided argument to a decorator.
+         */
         function getEffectiveDecoratorArgumentType(node: Decorator, argIndex: number): Type {
             if (argIndex === 0) {
                 return getEffectiveDecoratorFirstArgumentType(node.parent);
@@ -11873,9 +15428,9 @@ namespace ts {
         }
 
         /**
-          * Gets the effective argument type for an argument in a call expression.
-          */
-        function getEffectiveArgumentType(node: CallLikeExpression, argIndex: number, arg: Expression): Type {
+         * Gets the effective argument type for an argument in a call expression.
+         */
+        function getEffectiveArgumentType(node: CallLikeExpression, argIndex: number): Type {
             // Decorators provide special arguments, a tagged template expression provides
             // a special first argument, and string literals get string literal types
             // unless we're reporting errors
@@ -11892,8 +15447,8 @@ namespace ts {
         }
 
         /**
-          * Gets the effective argument expression for an argument in a call expression.
-          */
+         * Gets the effective argument expression for an argument in a call expression.
+         */
         function getEffectiveArgument(node: CallLikeExpression, args: Expression[], argIndex: number) {
             // For a decorator or the first argument of a tagged template expression we return undefined.
             if (node.kind === SyntaxKind.Decorator ||
@@ -11905,8 +15460,8 @@ namespace ts {
         }
 
         /**
-          * Gets the error node to use when reporting errors for an effective argument.
-          */
+         * Gets the error node to use when reporting errors for an effective argument.
+         */
         function getEffectiveArgumentErrorNode(node: CallLikeExpression, argIndex: number, arg: Expression) {
             if (node.kind === SyntaxKind.Decorator) {
                 // For a decorator, we use the expression of the decorator for error reporting.
@@ -11921,13 +15476,14 @@ namespace ts {
             }
         }
 
-        function resolveCall(node: CallLikeExpression, signatures: Signature[], candidatesOutArray: Signature[], headMessage?: DiagnosticMessage): Signature {
+        function resolveCall(node: CallLikeExpression, signatures: Signature[], candidatesOutArray: Signature[], fallbackError?: DiagnosticMessage): Signature {
             const isTaggedTemplate = node.kind === SyntaxKind.TaggedTemplateExpression;
             const isDecorator = node.kind === SyntaxKind.Decorator;
+            const isJsxOpeningOrSelfClosingElement = isJsxOpeningLikeElement(node);
 
             let typeArguments: TypeNode[];
 
-            if (!isTaggedTemplate && !isDecorator) {
+            if (!isTaggedTemplate && !isDecorator && !isJsxOpeningOrSelfClosingElement) {
                 typeArguments = (<CallExpression>node).typeArguments;
 
                 // We already perform checking on the type arguments on the class declaration itself.
@@ -11940,7 +15496,7 @@ namespace ts {
             // reorderCandidates fills up the candidates array directly
             reorderCandidates(signatures, candidates);
             if (!candidates.length) {
-                reportError(Diagnostics.Supplied_parameters_do_not_match_any_signature_of_call_target);
+                diagnostics.add(createDiagnosticForNode(node, Diagnostics.Call_target_does_not_contain_any_signatures));
                 return resolveErrorCall(node);
             }
 
@@ -11981,9 +15537,9 @@ namespace ts {
             // was fine. So if there is any overload that is only incorrect because of an
             // argument, we will report an error on that one.
             //
-            //     function foo(s: string) {}
-            //     function foo(n: number) {} // Report argument error on this overload
-            //     function foo() {}
+            //     function foo(s: string): void;
+            //     function foo(n: number): void; // Report argument error on this overload
+            //     function foo(): void;
             //     foo(true);
             //
             // If none of the overloads even made it that far, there are two possibilities.
@@ -11991,13 +15547,12 @@ namespace ts {
             // report an error on that. Or none of the overloads even had correct arity,
             // in which case give an arity error.
             //
-            //     function foo<T>(x: T, y: T) {} // Report type argument inference error
-            //     function foo() {}
-            //     foo(0, true);
+            //     function foo<T extends string>(x: T): void; // Report type argument error
+            //     function foo(): void;
+            //     foo<number>(0);
             //
             let candidateForArgumentError: Signature;
             let candidateForTypeArgumentError: Signature;
-            let resultOfFailedInference: InferenceContext;
             let result: Signature;
 
             // If we are in signature help, a trailing comma indicates that we intend to provide another argument,
@@ -12019,10 +15574,6 @@ namespace ts {
                 result = chooseOverload(candidates, subtypeRelation, signatureHelpTrailingComma);
             }
             if (!result) {
-                // Reinitialize these pointers for round two
-                candidateForArgumentError = undefined;
-                candidateForTypeArgumentError = undefined;
-                resultOfFailedInference = undefined;
                 result = chooseOverload(candidates, assignableRelation, signatureHelpTrailingComma);
             }
             if (result) {
@@ -12034,6 +15585,10 @@ namespace ts {
             // If candidate is undefined, it means that no candidates had a suitable arity. In that case,
             // skip the checkApplicableSignature check.
             if (candidateForArgumentError) {
+                if (isJsxOpeningOrSelfClosingElement) {
+                    // We do not report any error here because any error will be handled in "resolveCustomJsxElementAttributesType".
+                    return candidateForArgumentError;
+                }
                 // excludeArgument is undefined, in this case also equivalent to [undefined, undefined, ...]
                 // The importance of excludeArgument is to prevent us from typing function expression parameters
                 // in arguments too early. If possible, we'd like to only type them once we know the correct
@@ -12042,28 +15597,40 @@ namespace ts {
                 checkApplicableSignature(node, args, candidateForArgumentError, assignableRelation, /*excludeArgument*/ undefined, /*reportErrors*/ true);
             }
             else if (candidateForTypeArgumentError) {
-                if (!isTaggedTemplate && !isDecorator && typeArguments) {
-                    const typeArguments = (<CallExpression>node).typeArguments;
-                    checkTypeArguments(candidateForTypeArgumentError, typeArguments, map(typeArguments, getTypeFromTypeNodeNoAlias), /*reportErrors*/ true, headMessage);
-                }
-                else {
-                    Debug.assert(resultOfFailedInference.failedTypeParameterIndex >= 0);
-                    const failedTypeParameter = candidateForTypeArgumentError.typeParameters[resultOfFailedInference.failedTypeParameterIndex];
-                    const inferenceCandidates = getInferenceCandidates(resultOfFailedInference, resultOfFailedInference.failedTypeParameterIndex);
-
-                    let diagnosticChainHead = chainDiagnosticMessages(/*details*/ undefined, // details will be provided by call to reportNoCommonSupertypeError
-                        Diagnostics.The_type_argument_for_type_parameter_0_cannot_be_inferred_from_the_usage_Consider_specifying_the_type_arguments_explicitly,
-                        typeToString(failedTypeParameter));
-
-                    if (headMessage) {
-                        diagnosticChainHead = chainDiagnosticMessages(diagnosticChainHead, headMessage);
-                    }
-
-                    reportNoCommonSupertypeError(inferenceCandidates, (<CallExpression>node).expression || (<TaggedTemplateExpression>node).tag, diagnosticChainHead);
-                }
-            }
-            else {
-                reportError(Diagnostics.Supplied_parameters_do_not_match_any_signature_of_call_target);
+                const typeArguments = (<CallExpression>node).typeArguments;
+                checkTypeArguments(candidateForTypeArgumentError, typeArguments, map(typeArguments, getTypeFromTypeNode), /*reportErrors*/ true, fallbackError);
+            }
+            else if (typeArguments && every(signatures, sig => length(sig.typeParameters) !== typeArguments.length)) {
+                let min = Number.POSITIVE_INFINITY;
+                let max = Number.NEGATIVE_INFINITY;
+                for (const sig of signatures) {
+                    min = Math.min(min, getMinTypeArgumentCount(sig.typeParameters));
+                    max = Math.max(max, length(sig.typeParameters));
+                }
+                const paramCount = min < max ? `${min}-${max}` : min;
+                diagnostics.add(createDiagnosticForNode(node, Diagnostics.Expected_0_type_arguments_but_got_1, paramCount, typeArguments.length));
+            }
+            else if (args) {
+                let min = Number.POSITIVE_INFINITY;
+                let max = Number.NEGATIVE_INFINITY;
+                for (const sig of signatures) {
+                    min = Math.min(min, sig.minArgumentCount);
+                    max = Math.max(max, sig.parameters.length);
+                }
+                const hasRestParameter = some(signatures, sig => sig.hasRestParameter);
+                const hasSpreadArgument = getSpreadArgumentIndex(args) > -1;
+                const paramCount = hasRestParameter ? min :
+                    min < max ? `${min}-${max}` :
+                    min;
+                const argCount = args.length - (hasSpreadArgument ? 1 : 0);
+                const error = hasRestParameter && hasSpreadArgument ? Diagnostics.Expected_at_least_0_arguments_but_got_a_minimum_of_1 :
+                    hasRestParameter ? Diagnostics.Expected_at_least_0_arguments_but_got_1 :
+                    hasSpreadArgument ? Diagnostics.Expected_0_arguments_but_got_a_minimum_of_1 :
+                    Diagnostics.Expected_0_arguments_but_got_1;
+                diagnostics.add(createDiagnosticForNode(node, error, paramCount, argCount));
+            }
+            else if (fallbackError) {
+                diagnostics.add(createDiagnosticForNode(node, fallbackError));
             }
 
             // No signature was applicable. We have already reported the errors for the invalid signature.
@@ -12075,7 +15642,7 @@ namespace ts {
                 for (let candidate of candidates) {
                     if (hasCorrectArity(node, args, candidate)) {
                         if (candidate.typeParameters && typeArguments) {
-                            candidate = getSignatureInstantiation(candidate, map(typeArguments, getTypeFromTypeNodeNoAlias));
+                            candidate = getSignatureInstantiation(candidate, map(typeArguments, getTypeFromTypeNode));
                         }
                         return candidate;
                     }
@@ -12084,77 +15651,45 @@ namespace ts {
 
             return resolveErrorCall(node);
 
-            function reportError(message: DiagnosticMessage, arg0?: string, arg1?: string, arg2?: string): void {
-                let errorInfo: DiagnosticMessageChain;
-                errorInfo = chainDiagnosticMessages(errorInfo, message, arg0, arg1, arg2);
-                if (headMessage) {
-                    errorInfo = chainDiagnosticMessages(errorInfo, headMessage);
-                }
-
-                diagnostics.add(createDiagnosticForNodeFromMessageChain(node, errorInfo));
-            }
-
             function chooseOverload(candidates: Signature[], relation: Map<RelationComparisonResult>, signatureHelpTrailingComma = false) {
+                candidateForArgumentError = undefined;
+                candidateForTypeArgumentError = undefined;
                 for (const originalCandidate of candidates) {
                     if (!hasCorrectArity(node, args, originalCandidate, signatureHelpTrailingComma)) {
                         continue;
                     }
 
                     let candidate: Signature;
-                    let typeArgumentsAreValid: boolean;
-                    const inferenceContext = originalCandidate.typeParameters
-                        ? createInferenceContext(originalCandidate, /*inferUnionTypes*/ false)
-                        : undefined;
+                    const inferenceContext = originalCandidate.typeParameters ?
+                        createInferenceContext(originalCandidate, /*flags*/ isInJavaScriptFile(node) ? InferenceFlags.AnyDefault : 0) :
+                        undefined;
 
                     while (true) {
                         candidate = originalCandidate;
                         if (candidate.typeParameters) {
                             let typeArgumentTypes: Type[];
                             if (typeArguments) {
-                                typeArgumentTypes = map(typeArguments, getTypeFromTypeNodeNoAlias);
-                                typeArgumentsAreValid = checkTypeArguments(candidate, typeArguments, typeArgumentTypes, /*reportErrors*/ false);
+                                typeArgumentTypes = fillMissingTypeArguments(map(typeArguments, getTypeFromTypeNode), candidate.typeParameters, getMinTypeArgumentCount(candidate.typeParameters));
+                                if (!checkTypeArguments(candidate, typeArguments, typeArgumentTypes, /*reportErrors*/ false)) {
+                                    candidateForTypeArgumentError = originalCandidate;
+                                    break;
+                                }
                             }
                             else {
-                                inferTypeArguments(node, candidate, args, excludeArgument, inferenceContext);
-                                typeArgumentsAreValid = inferenceContext.failedTypeParameterIndex === undefined;
-                                typeArgumentTypes = inferenceContext.inferredTypes;
-                            }
-                            if (!typeArgumentsAreValid) {
-                                break;
+                                typeArgumentTypes = inferTypeArguments(node, candidate, args, excludeArgument, inferenceContext);
                             }
                             candidate = getSignatureInstantiation(candidate, typeArgumentTypes);
                         }
                         if (!checkApplicableSignature(node, args, candidate, relation, excludeArgument, /*reportErrors*/ false)) {
+                            candidateForArgumentError = candidate;
                             break;
                         }
-                        const index = excludeArgument ? indexOf(excludeArgument, true) : -1;
+                        const index = excludeArgument ? indexOf(excludeArgument, /*value*/ true) : -1;
                         if (index < 0) {
                             return candidate;
                         }
                         excludeArgument[index] = false;
                     }
-
-                    // A post-mortem of this iteration of the loop. The signature was not applicable,
-                    // so we want to track it as a candidate for reporting an error. If the candidate
-                    // had no type parameters, or had no issues related to type arguments, we can
-                    // report an error based on the arguments. If there was an issue with type
-                    // arguments, then we can only report an error based on the type arguments.
-                    if (originalCandidate.typeParameters) {
-                        const instantiatedCandidate = candidate;
-                        if (typeArgumentsAreValid) {
-                            candidateForArgumentError = instantiatedCandidate;
-                        }
-                        else {
-                            candidateForTypeArgumentError = originalCandidate;
-                            if (!typeArguments) {
-                                resultOfFailedInference = inferenceContext;
-                            }
-                        }
-                    }
-                    else {
-                        Debug.assert(originalCandidate === candidate);
-                        candidateForArgumentError = originalCandidate;
-                    }
                 }
 
                 return undefined;
@@ -12170,7 +15705,7 @@ namespace ts {
                     // with the type arguments specified in the extends clause.
                     const baseTypeNode = getClassExtendsHeritageClauseElement(getContainingClass(node));
                     if (baseTypeNode) {
-                        const baseConstructors = getInstantiatedConstructorsForTypeArguments(superType, baseTypeNode.typeArguments);
+                        const baseConstructors = getInstantiatedConstructorsForTypeArguments(superType, baseTypeNode.typeArguments, baseTypeNode);
                         return resolveCall(node, baseConstructors, candidatesOutArray);
                     }
                 }
@@ -12274,7 +15809,7 @@ namespace ts {
             // only the class declaration node will have the Abstract flag set.
             const valueDecl = expressionType.symbol && getClassLikeDeclarationOfSymbol(expressionType.symbol);
             if (valueDecl && getModifierFlags(valueDecl) & ModifierFlags.Abstract) {
-                error(node, Diagnostics.Cannot_create_an_instance_of_the_abstract_class_0, declarationNameToString(valueDecl.name));
+                error(node, Diagnostics.Cannot_create_an_instance_of_the_abstract_class_0, declarationNameToString(getNameOfDeclaration(valueDecl)));
                 return resolveErrorCall(node);
             }
 
@@ -12307,7 +15842,7 @@ namespace ts {
             const callSignatures = getSignaturesOfType(expressionType, SignatureKind.Call);
             if (callSignatures.length) {
                 const signature = resolveCall(node, callSignatures, candidatesOutArray);
-                if (getReturnTypeOfSignature(signature) !== voidType) {
+                if (!isJavaScriptConstructor(signature.declaration) && getReturnTypeOfSignature(signature) !== voidType) {
                     error(node, Diagnostics.Only_a_void_function_can_be_called_with_the_new_keyword);
                 }
                 if (getThisTypeOfSignature(signature) === voidType) {
@@ -12341,13 +15876,14 @@ namespace ts {
                 const containingClass = getContainingClass(node);
                 if (containingClass) {
                     const containingType = getTypeOfNode(containingClass);
-                    const baseTypes = getBaseTypes(<InterfaceType>containingType);
-                    if (baseTypes.length) {
+                    let baseTypes = getBaseTypes(containingType as InterfaceType);
+                    while (baseTypes.length) {
                         const baseType = baseTypes[0];
                         if (modifiers & ModifierFlags.Protected &&
                             baseType.symbol === declaration.parent.symbol) {
                             return true;
                         }
+                        baseTypes = getBaseTypes(baseType as InterfaceType);
                     }
                 }
                 if (modifiers & ModifierFlags.Private) {
@@ -12387,8 +15923,8 @@ namespace ts {
         }
 
         /**
-          * Gets the localized diagnostic head message to use for errors when resolving a decorator as a call expression.
-          */
+         * Gets the localized diagnostic head message to use for errors when resolving a decorator as a call expression.
+         */
         function getDiagnosticHeadMessageForDecoratorResolution(node: Decorator) {
             switch (node.parent.kind) {
                 case SyntaxKind.ClassDeclaration:
@@ -12409,8 +15945,8 @@ namespace ts {
         }
 
         /**
-          * Resolves a decorator as if it were a call expression.
-          */
+         * Resolves a decorator as if it were a call expression.
+         */
         function resolveDecorator(node: Decorator, candidatesOutArray: Signature[]): Signature {
             const funcType = checkExpression(node.expression);
             const apparentType = getApparentType(funcType);
@@ -12436,6 +15972,53 @@ namespace ts {
             return resolveCall(node, callSignatures, candidatesOutArray, headMessage);
         }
 
+        /**
+         * This function is similar to getResolvedSignature but is exclusively for trying to resolve JSX stateless-function component.
+         * The main reason we have to use this function instead of getResolvedSignature because, the caller of this function will already check the type of openingLikeElement's tagName
+         * and pass the type as elementType. The elementType can not be a union (as such case should be handled by the caller of this function)
+         * Note: at this point, we are still not sure whether the opening-like element is a stateless function component or not.
+         * @param openingLikeElement an opening-like JSX element to try to resolve as JSX stateless function
+         * @param elementType an element type of the opneing-like element by checking opening-like element's tagname.
+         * @param candidatesOutArray an array of signature to be filled in by the function. It is passed by signature help in the language service;
+         *                           the function will fill it up with appropriate candidate signatures
+         */
+        function getResolvedJsxStatelessFunctionSignature(openingLikeElement: JsxOpeningLikeElement, elementType: Type, candidatesOutArray: Signature[]): Signature {
+            Debug.assert(!(elementType.flags & TypeFlags.Union));
+            const callSignature = resolveStatelessJsxOpeningLikeElement(openingLikeElement, elementType, candidatesOutArray);
+            return callSignature;
+        }
+
+        /**
+         * Try treating a given opening-like element as stateless function component and resolve a tagName to a function signature.
+         * @param openingLikeElement an JSX opening-like element we want to try resolve its stateless function if possible
+         * @param elementType a type of the opening-like JSX element, a result of resolving tagName in opening-like element.
+         * @param candidatesOutArray an array of signature to be filled in by the function. It is passed by signature help in the language service;
+         *                           the function will fill it up with appropriate candidate signatures
+         * @return a resolved signature if we can find function matching function signature through resolve call or a first signature in the list of functions.
+         *         otherwise return undefined if tag-name of the opening-like element doesn't have call signatures
+         */
+        function resolveStatelessJsxOpeningLikeElement(openingLikeElement: JsxOpeningLikeElement, elementType: Type, candidatesOutArray: Signature[]): Signature {
+            // If this function is called from language service, elementType can be a union type. This is not possible if the function is called from compiler (see: resolveCustomJsxElementAttributesType)
+            if (elementType.flags & TypeFlags.Union) {
+                const types = (elementType as UnionType).types;
+                let result: Signature;
+                for (const type of types) {
+                    result = result || resolveStatelessJsxOpeningLikeElement(openingLikeElement, type, candidatesOutArray);
+                }
+
+                return result;
+            }
+
+            const callSignatures = elementType && getSignaturesOfType(elementType, SignatureKind.Call);
+            if (callSignatures && callSignatures.length > 0) {
+                let callSignature: Signature;
+                callSignature = resolveCall(openingLikeElement, callSignatures, candidatesOutArray);
+                return callSignature;
+            }
+
+            return undefined;
+        }
+
         function resolveSignature(node: CallLikeExpression, candidatesOutArray?: Signature[]): Signature {
             switch (node.kind) {
                 case SyntaxKind.CallExpression:
@@ -12446,12 +16029,21 @@ namespace ts {
                     return resolveTaggedTemplateExpression(<TaggedTemplateExpression>node, candidatesOutArray);
                 case SyntaxKind.Decorator:
                     return resolveDecorator(<Decorator>node, candidatesOutArray);
+                case SyntaxKind.JsxOpeningElement:
+                case SyntaxKind.JsxSelfClosingElement:
+                    // This code-path is called by language service
+                    return resolveStatelessJsxOpeningLikeElement(<JsxOpeningLikeElement>node, checkExpression((<JsxOpeningLikeElement>node).tagName), candidatesOutArray);
             }
             Debug.fail("Branch in 'resolveSignature' should be unreachable.");
         }
 
-        // candidatesOutArray is passed by signature help in the language service, and collectCandidates
-        // must fill it up with the appropriate candidate signatures
+        /**
+         * Resolve a signature of a given call-like expression.
+         * @param node a call-like expression to try resolve a signature for
+         * @param candidatesOutArray an array of signature to be filled in by the function. It is passed by signature help in the language service;
+         *                           the function will fill it up with appropriate candidate signatures
+         * @return a signature of the call-like expression or undefined if one can't be found
+         */
         function getResolvedSignature(node: CallLikeExpression, candidatesOutArray?: Signature[]): Signature {
             const links = getNodeLinks(node);
             // If getResolvedSignature has already been called, we will have cached the resolvedSignature.
@@ -12477,20 +16069,46 @@ namespace ts {
             return getNodeLinks(node).resolvedSignature === resolvingSignature ? resolvingSignature : getResolvedSignature(node);
         }
 
+        /**
+         * Indicates whether a declaration can be treated as a constructor in a JavaScript
+         * file.
+         */
+        function isJavaScriptConstructor(node: Declaration): boolean {
+            if (isInJavaScriptFile(node)) {
+                // If the node has a @class tag, treat it like a constructor.
+                if (getJSDocClassTag(node)) return true;
+
+                // If the symbol of the node has members, treat it like a constructor.
+                const symbol = isFunctionDeclaration(node) || isFunctionExpression(node) ? getSymbolOfNode(node) :
+                     isVariableDeclaration(node) && isFunctionExpression(node.initializer) ? getSymbolOfNode(node.initializer) :
+                     undefined;
+
+                return symbol && symbol.members !== undefined;
+            }
+
+            return false;
+        }
+
         function getInferredClassType(symbol: Symbol) {
             const links = getSymbolLinks(symbol);
             if (!links.inferredClassType) {
-                links.inferredClassType = createAnonymousType(symbol, symbol.members, emptyArray, emptyArray, /*stringIndexType*/ undefined, /*numberIndexType*/ undefined);
+                links.inferredClassType = createAnonymousType(symbol, symbol.members || emptySymbols, emptyArray, emptyArray, /*stringIndexType*/ undefined, /*numberIndexType*/ undefined);
             }
             return links.inferredClassType;
         }
 
+        function isInferredClassType(type: Type) {
+            return type.symbol
+                && getObjectFlags(type) & ObjectFlags.Anonymous
+                && getSymbolLinks(type.symbol).inferredClassType === type;
+        }
+
         /**
          * Syntactically and semantically checks a call or new expression.
          * @param node The call/new expression to be checked.
          * @returns On success, the expression's signature's return type. On failure, anyType.
          */
-        function checkCallExpression(node: CallExpression): Type {
+        function checkCallExpression(node: CallExpression | NewExpression): Type {
             // Grammar checking; stop grammar-checking if checkGrammarTypeArguments return true
             checkGrammarTypeArguments(node, node.typeArguments) || checkGrammarArguments(node, node.arguments);
 
@@ -12514,13 +16132,16 @@ namespace ts {
                     // in a JS file
                     // Note:JS inferred classes might come from a variable declaration instead of a function declaration.
                     // In this case, using getResolvedSymbol directly is required to avoid losing the members from the declaration.
-                    const funcSymbol = node.expression.kind === SyntaxKind.Identifier ?
+                    let funcSymbol = node.expression.kind === SyntaxKind.Identifier ?
                         getResolvedSymbol(node.expression as Identifier) :
                         checkExpression(node.expression).symbol;
-                    if (funcSymbol && funcSymbol.members && (funcSymbol.flags & SymbolFlags.Function || isDeclarationOfFunctionExpression(funcSymbol))) {
+                    if (funcSymbol && isDeclarationOfFunctionOrClassExpression(funcSymbol)) {
+                        funcSymbol = getSymbolOfNode((<VariableDeclaration>funcSymbol.valueDeclaration).initializer);
+                    }
+                    if (funcSymbol && funcSymbol.flags & SymbolFlags.Function && (funcSymbol.members || getJSDocClassTag(funcSymbol.valueDeclaration))) {
                         return getInferredClassType(funcSymbol);
                     }
-                    else if (compilerOptions.noImplicitAny) {
+                    else if (noImplicitAny) {
                         error(node, Diagnostics.new_expression_whose_target_lacks_a_construct_signature_implicitly_has_an_any_type);
                     }
                     return anyType;
@@ -12528,13 +16149,70 @@ namespace ts {
             }
 
             // In JavaScript files, calls to any identifier 'require' are treated as external module imports
-            if (isInJavaScriptFile(node) && isRequireCall(node, /*checkArgumentIsStringLiteral*/true)) {
+            if (isInJavaScriptFile(node) && isCommonJsRequire(node)) {
                 return resolveExternalModuleTypeByLiteral(<StringLiteral>node.arguments[0]);
             }
 
             return getReturnTypeOfSignature(signature);
         }
 
+        function checkImportCallExpression(node: ImportCall): Type {
+            // Check grammar of dynamic import
+            checkGrammarArguments(node, node.arguments) || checkGrammarImportCallExpression(node);
+
+            if (node.arguments.length === 0) {
+                return createPromiseReturnType(node, anyType);
+            }
+            const specifier = node.arguments[0];
+            const specifierType = checkExpressionCached(specifier);
+            // Even though multiple arugments is grammatically incorrect, type-check extra arguments for completion
+            for (let i = 1; i < node.arguments.length; ++i) {
+                checkExpressionCached(node.arguments[i]);
+            }
+
+            if (specifierType.flags & TypeFlags.Undefined || specifierType.flags & TypeFlags.Null || !isTypeAssignableTo(specifierType, stringType)) {
+                error(specifier, Diagnostics.Dynamic_import_s_specifier_must_be_of_type_string_but_here_has_type_0, typeToString(specifierType));
+            }
+
+            // resolveExternalModuleName will return undefined if the moduleReferenceExpression is not a string literal
+            const moduleSymbol = resolveExternalModuleName(node, specifier);
+            if (moduleSymbol) {
+                const esModuleSymbol = resolveESModuleSymbol(moduleSymbol, specifier, /*dontRecursivelyResolve*/ true);
+                if (esModuleSymbol) {
+                    return createPromiseReturnType(node, getTypeOfSymbol(esModuleSymbol));
+                }
+            }
+            return createPromiseReturnType(node, anyType);
+        }
+
+        function isCommonJsRequire(node: Node) {
+            if (!isRequireCall(node, /*checkArgumentIsStringLiteral*/ true)) {
+                return false;
+            }
+                // Make sure require is not a local function
+            const resolvedRequire = resolveName(node.expression, (<Identifier>node.expression).text, SymbolFlags.Value, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined);
+            if (!resolvedRequire) {
+                // project does not contain symbol named 'require' - assume commonjs require
+                return true;
+            }
+            // project includes symbol named 'require' - make sure that it it ambient and local non-alias
+            if (resolvedRequire.flags & SymbolFlags.Alias) {
+                return false;
+            }
+
+            const targetDeclarationKind = resolvedRequire.flags & SymbolFlags.Function
+                ? SyntaxKind.FunctionDeclaration
+                : resolvedRequire.flags & SymbolFlags.Variable
+                    ? SyntaxKind.VariableDeclaration
+                    : SyntaxKind.Unknown;
+            if (targetDeclarationKind !== SyntaxKind.Unknown) {
+                const decl = getDeclarationOfKind(resolvedRequire, targetDeclarationKind);
+                // function/variable declaration should be ambient
+                return isInAmbientContext(decl);
+            }
+            return false;
+        }
+
         function checkTaggedTemplateExpression(node: TaggedTemplateExpression): Type {
             return getReturnTypeOfSignature(getResolvedSignature(node));
         }
@@ -12558,12 +16236,29 @@ namespace ts {
             return getNonNullableType(checkExpression(node.expression));
         }
 
+        function checkMetaProperty(node: MetaProperty) {
+            checkGrammarMetaProperty(node);
+            const container = getNewTargetContainer(node);
+            if (!container) {
+                error(node, Diagnostics.Meta_property_0_is_only_allowed_in_the_body_of_a_function_declaration_function_expression_or_constructor, "new.target");
+                return unknownType;
+            }
+            else if (container.kind === SyntaxKind.Constructor) {
+                const symbol = getSymbolOfNode(container.parent);
+                return getTypeOfSymbol(symbol);
+            }
+            else {
+                const symbol = getSymbolOfNode(container);
+                return getTypeOfSymbol(symbol);
+            }
+        }
+
         function getTypeOfParameter(symbol: Symbol) {
             const type = getTypeOfSymbol(symbol);
             if (strictNullChecks) {
                 const declaration = symbol.valueDeclaration;
                 if (declaration && (<VariableLikeDeclaration>declaration).initializer) {
-                    return includeFalsyTypes(type, TypeFlags.Undefined);
+                    return getNullableType(type, TypeFlags.Undefined);
                 }
             }
             return type;
@@ -12575,23 +16270,48 @@ namespace ts {
                 pos < signature.parameters.length ? getTypeOfParameter(signature.parameters[pos]) : anyType;
         }
 
-        function assignContextualParameterTypes(signature: Signature, context: Signature, mapper: TypeMapper) {
+        function getTypeOfFirstParameterOfSignature(signature: Signature) {
+            return signature.parameters.length > 0 ? getTypeAtPosition(signature, 0) : neverType;
+        }
+
+        function inferFromAnnotatedParameters(signature: Signature, context: Signature, mapper: TypeMapper) {
             const len = signature.parameters.length - (signature.hasRestParameter ? 1 : 0);
+            for (let i = 0; i < len; i++) {
+                const declaration = <ParameterDeclaration>signature.parameters[i].valueDeclaration;
+                if (declaration.type) {
+                    const typeNode = getEffectiveTypeAnnotationNode(declaration);
+                    if (typeNode) {
+                        inferTypes((<InferenceContext>mapper).inferences, getTypeFromTypeNode(typeNode), getTypeAtPosition(context, i));
+                    }
+                }
+            }
+        }
+
+        function assignContextualParameterTypes(signature: Signature, context: Signature) {
+            signature.typeParameters = context.typeParameters;
             if (context.thisParameter) {
-                if (!signature.thisParameter) {
-                    signature.thisParameter = createTransientSymbol(context.thisParameter, undefined);
+                const parameter = signature.thisParameter;
+                if (!parameter || parameter.valueDeclaration && !(<ParameterDeclaration>parameter.valueDeclaration).type) {
+                    if (!parameter) {
+                        signature.thisParameter = createSymbolWithType(context.thisParameter, /*type*/ undefined);
+                    }
+                    assignTypeToParameterAndFixTypeParameters(signature.thisParameter, getTypeOfSymbol(context.thisParameter));
                 }
-                assignTypeToParameterAndFixTypeParameters(signature.thisParameter, getTypeOfSymbol(context.thisParameter), mapper);
             }
+            const len = signature.parameters.length - (signature.hasRestParameter ? 1 : 0);
             for (let i = 0; i < len; i++) {
                 const parameter = signature.parameters[i];
-                const contextualParameterType = getTypeAtPosition(context, i);
-                assignTypeToParameterAndFixTypeParameters(parameter, contextualParameterType, mapper);
+                if (!getEffectiveTypeAnnotationNode(<ParameterDeclaration>parameter.valueDeclaration)) {
+                    const contextualParameterType = getTypeAtPosition(context, i);
+                    assignTypeToParameterAndFixTypeParameters(parameter, contextualParameterType);
+                }
             }
             if (signature.hasRestParameter && isRestParameterIndex(context, signature.parameters.length - 1)) {
                 const parameter = lastOrUndefined(signature.parameters);
-                const contextualParameterType = getTypeOfSymbol(lastOrUndefined(context.parameters));
-                assignTypeToParameterAndFixTypeParameters(parameter, contextualParameterType, mapper);
+                if (!getEffectiveTypeAnnotationNode(<ParameterDeclaration>parameter.valueDeclaration)) {
+                    const contextualParameterType = getTypeOfSymbol(lastOrUndefined(context.parameters));
+                    assignTypeToParameterAndFixTypeParameters(parameter, contextualParameterType);
+                }
             }
         }
 
@@ -12599,7 +16319,7 @@ namespace ts {
         // the destructured type into the contained binding elements.
         function assignBindingElementTypes(node: VariableLikeDeclaration) {
             if (isBindingPattern(node.name)) {
-                for (const element of (<BindingPattern>node.name).elements) {
+                for (const element of node.name.elements) {
                     if (!isOmittedExpression(element)) {
                         if (element.name.kind === SyntaxKind.Identifier) {
                             getSymbolLinks(getSymbolOfNode(element)).type = getTypeForBindingElement(element);
@@ -12610,109 +16330,76 @@ namespace ts {
             }
         }
 
-        function assignTypeToParameterAndFixTypeParameters(parameter: Symbol, contextualType: Type, mapper: TypeMapper) {
+        function assignTypeToParameterAndFixTypeParameters(parameter: Symbol, contextualType: Type) {
             const links = getSymbolLinks(parameter);
             if (!links.type) {
-                links.type = instantiateType(contextualType, mapper);
+                links.type = contextualType;
+                const name = getNameOfDeclaration(parameter.valueDeclaration);
                 // if inference didn't come up with anything but {}, fall back to the binding pattern if present.
                 if (links.type === emptyObjectType &&
-                    (parameter.valueDeclaration.name.kind === SyntaxKind.ObjectBindingPattern ||
-                        parameter.valueDeclaration.name.kind === SyntaxKind.ArrayBindingPattern)) {
-                    links.type = getTypeFromBindingPattern(<BindingPattern>parameter.valueDeclaration.name);
+                    (name.kind === SyntaxKind.ObjectBindingPattern || name.kind === SyntaxKind.ArrayBindingPattern)) {
+                    links.type = getTypeFromBindingPattern(<BindingPattern>name);
                 }
                 assignBindingElementTypes(<ParameterDeclaration>parameter.valueDeclaration);
             }
-            else if (isInferentialContext(mapper)) {
-                // Even if the parameter already has a type, it might be because it was given a type while
-                // processing the function as an argument to a prior signature during overload resolution.
-                // If this was the case, it may have caused some type parameters to be fixed. So here,
-                // we need to ensure that type parameters at the same positions get fixed again. This is
-                // done by calling instantiateType to attach the mapper to the contextualType, and then
-                // calling inferTypes to force a walk of contextualType so that all the correct fixing
-                // happens. The choice to pass in links.type may seem kind of arbitrary, but it serves
-                // to make sure that all the correct positions in contextualType are reached by the walk.
-                // Here is an example:
-                //
-                //      interface Base {
-                //          baseProp;
-                //      }
-                //      interface Derived extends Base {
-                //          toBase(): Base;
-                //      }
-                //
-                //      var derived: Derived;
-                //
-                //      declare function foo<T>(x: T, func: (p: T) => T): T;
-                //      declare function foo<T>(x: T, func: (p: T) => T): T;
-                //
-                //      var result = foo(derived, d => d.toBase());
-                //
-                // We are typing d while checking the second overload. But we've already given d
-                // a type (Derived) from the first overload. However, we still want to fix the
-                // T in the second overload so that we do not infer Base as a candidate for T
-                // (inferring Base would make type argument inference inconsistent between the two
-                // overloads).
-                inferTypes(mapper.context, links.type, instantiateType(contextualType, mapper));
-            }
-        }
-
-        function getReturnTypeFromJSDocComment(func: SignatureDeclaration | FunctionDeclaration): Type {
-            const returnTag = getJSDocReturnTag(func);
-            if (returnTag && returnTag.typeExpression) {
-                return getTypeFromTypeNode(returnTag.typeExpression.type);
-            }
-
-            return undefined;
         }
 
         function createPromiseType(promisedType: Type): Type {
             // creates a `Promise<T>` type where `T` is the promisedType argument
-            const globalPromiseType = getGlobalPromiseType();
+            const globalPromiseType = getGlobalPromiseType(/*reportErrors*/ true);
             if (globalPromiseType !== emptyGenericType) {
                 // if the promised type is itself a promise, get the underlying type; otherwise, fallback to the promised type
-                promisedType = getAwaitedType(promisedType);
+                promisedType = getAwaitedType(promisedType) || emptyObjectType;
                 return createTypeReference(<GenericType>globalPromiseType, [promisedType]);
             }
 
             return emptyObjectType;
         }
 
-        function createPromiseReturnType(func: FunctionLikeDeclaration, promisedType: Type) {
+        function createPromiseReturnType(func: FunctionLikeDeclaration | ImportCall, promisedType: Type) {
             const promiseType = createPromiseType(promisedType);
             if (promiseType === emptyObjectType) {
-                error(func, Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type);
+                error(func, isImportCall(func) ?
+                    Diagnostics.A_dynamic_import_call_returns_a_Promise_Make_sure_you_have_a_declaration_for_Promise_or_include_ES2015_in_your_lib_option :
+                    Diagnostics.An_async_function_or_method_must_return_a_Promise_Make_sure_you_have_a_declaration_for_Promise_or_include_ES2015_in_your_lib_option);
                 return unknownType;
             }
+            else if (!getGlobalPromiseConstructorSymbol(/*reportErrors*/ true)) {
+                error(func, isImportCall(func) ?
+                    Diagnostics.A_dynamic_import_call_in_ES5_SlashES3_requires_the_Promise_constructor_Make_sure_you_have_a_declaration_for_the_Promise_constructor_or_include_ES2015_in_your_lib_option :
+                    Diagnostics.An_async_function_or_method_in_ES5_SlashES3_requires_the_Promise_constructor_Make_sure_you_have_a_declaration_for_the_Promise_constructor_or_include_ES2015_in_your_lib_option);
+            }
 
             return promiseType;
         }
 
-        function getReturnTypeFromBody(func: FunctionLikeDeclaration, contextualMapper?: TypeMapper): Type {
+        function getReturnTypeFromBody(func: FunctionLikeDeclaration, checkMode?: CheckMode): Type {
             const contextualSignature = getContextualSignatureForFunctionLikeDeclaration(func);
             if (!func.body) {
                 return unknownType;
             }
 
-            const isAsync = isAsyncFunctionLike(func);
+            const functionFlags = getFunctionFlags(func);
             let type: Type;
             if (func.body.kind !== SyntaxKind.Block) {
-                type = checkExpressionCached(<Expression>func.body, contextualMapper);
-                if (isAsync) {
+                type = checkExpressionCached(<Expression>func.body, checkMode);
+                if (functionFlags & FunctionFlags.Async) {
                     // From within an async function you can return either a non-promise value or a promise. Any
                     // Promise/A+ compatible implementation will always assimilate any foreign promise, so the
                     // return type of the body should be unwrapped to its awaited type, which we will wrap in
                     // the native Promise<T> type later in this function.
-                    type = checkAwaitedType(type, func, Diagnostics.Return_expression_in_async_function_does_not_have_a_valid_callable_then_member);
+                    type = checkAwaitedType(type, /*errorNode*/ func, Diagnostics.The_return_type_of_an_async_function_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member);
                 }
             }
             else {
                 let types: Type[];
-                const funcIsGenerator = !!func.asteriskToken;
-                if (funcIsGenerator) {
-                    types = checkAndAggregateYieldOperandTypes(func, contextualMapper);
-                    if (types.length === 0) {
-                        const iterableIteratorAny = createIterableIteratorType(anyType);
-                        if (compilerOptions.noImplicitAny) {
+                if (functionFlags & FunctionFlags.Generator) { // Generator or AsyncGenerator function
+                    types = concatenate(checkAndAggregateYieldOperandTypes(func, checkMode), checkAndAggregateReturnExpressionTypes(func, checkMode));
+                    if (!types || types.length === 0) {
+                        const iterableIteratorAny = functionFlags & FunctionFlags.Async
+                            ? createAsyncIterableIteratorType(anyType) // AsyncGenerator function
+                            : createIterableIteratorType(anyType); // Generator function
+                        if (noImplicitAny) {
                             error(func.asteriskToken,
                                 Diagnostics.Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_type, typeToString(iterableIteratorAny));
                         }
@@ -12720,27 +16407,38 @@ namespace ts {
                     }
                 }
                 else {
-                    types = checkAndAggregateReturnExpressionTypes(func, contextualMapper);
+                    types = checkAndAggregateReturnExpressionTypes(func, checkMode);
                     if (!types) {
                         // For an async function, the return type will not be never, but rather a Promise for never.
-                        return isAsync ? createPromiseReturnType(func, neverType) : neverType;
+                        return functionFlags & FunctionFlags.Async
+                            ? createPromiseReturnType(func, neverType) // Async function
+                            : neverType; // Normal function
                     }
                     if (types.length === 0) {
                         // For an async function, the return type will not be void, but rather a Promise for void.
-                        return isAsync ? createPromiseReturnType(func, voidType) : voidType;
+                        return functionFlags & FunctionFlags.Async
+                            ? createPromiseReturnType(func, voidType) // Async function
+                            : voidType; // Normal function
                     }
                 }
                 // Return a union of the return expression types.
                 type = getUnionType(types, /*subtypeReduction*/ true);
 
-                if (funcIsGenerator) {
-                    type = createIterableIteratorType(type);
+                if (functionFlags & FunctionFlags.Generator) { // AsyncGenerator function or Generator function
+                    type = functionFlags & FunctionFlags.Async
+                        ? createAsyncIterableIteratorType(type) // AsyncGenerator function
+                        : createIterableIteratorType(type); // Generator function
                 }
             }
+
             if (!contextualSignature) {
                 reportErrorsFromWidening(func, type);
             }
-            if (isUnitType(type) && !(contextualSignature && isLiteralContextualType(getReturnTypeOfSignature(contextualSignature)))) {
+
+            if (isUnitType(type) &&
+                !(contextualSignature &&
+                    isLiteralContextualType(
+                        contextualSignature === getSignatureFromDeclaration(func) ? type : getReturnTypeOfSignature(contextualSignature)))) {
                 type = getWidenedLiteralType(type);
             }
 
@@ -12748,22 +16446,27 @@ namespace ts {
             // From within an async function you can return either a non-promise value or a promise. Any
             // Promise/A+ compatible implementation will always assimilate any foreign promise, so the
             // return type of the body is awaited type of the body, wrapped in a native Promise<T> type.
-            return isAsync ? createPromiseReturnType(func, widenedType) : widenedType;
+            return (functionFlags & FunctionFlags.AsyncGenerator) === FunctionFlags.Async
+                ? createPromiseReturnType(func, widenedType) // Async function
+                : widenedType; // Generator function, AsyncGenerator function, or normal function
         }
 
-        function checkAndAggregateYieldOperandTypes(func: FunctionLikeDeclaration, contextualMapper: TypeMapper): Type[] {
+        function checkAndAggregateYieldOperandTypes(func: FunctionLikeDeclaration, checkMode: CheckMode): Type[] {
             const aggregatedTypes: Type[] = [];
-
+            const functionFlags = getFunctionFlags(func);
             forEachYieldExpression(<Block>func.body, yieldExpression => {
                 const expr = yieldExpression.expression;
                 if (expr) {
-                    let type = checkExpressionCached(expr, contextualMapper);
-
+                    let type = checkExpressionCached(expr, checkMode);
                     if (yieldExpression.asteriskToken) {
                         // A yield* expression effectively yields everything that its operand yields
-                        type = checkElementTypeOfIterable(type, yieldExpression.expression);
+                        type = checkIteratedTypeOrElementType(type, yieldExpression.expression, /*allowStringInput*/ false, (functionFlags & FunctionFlags.Async) !== 0);
+                    }
+                    if (functionFlags & FunctionFlags.Async) {
+                        type = checkAwaitedType(type, expr, yieldExpression.asteriskToken
+                            ? Diagnostics.Type_of_iterated_elements_of_a_yield_Asterisk_operand_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member
+                            : Diagnostics.Type_of_yield_operand_in_an_async_generator_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member);
                     }
-
                     if (!contains(aggregatedTypes, type)) {
                         aggregatedTypes.push(type);
                     }
@@ -12777,7 +16480,7 @@ namespace ts {
             if (!node.possiblyExhaustive) {
                 return false;
             }
-            const type = checkExpression(node.expression);
+            const type = getTypeOfExpression(node.expression);
             if (!isLiteralType(type)) {
                 return false;
             }
@@ -12785,7 +16488,7 @@ namespace ts {
             if (!switchTypes.length) {
                 return false;
             }
-            return eachTypeContainedIn(type, switchTypes);
+            return eachTypeContainedIn(mapType(type, getRegularTypeOfLiteralType), switchTypes);
         }
 
         function functionHasImplicitReturn(func: FunctionLikeDeclaration) {
@@ -12799,21 +16502,21 @@ namespace ts {
             return true;
         }
 
-        function checkAndAggregateReturnExpressionTypes(func: FunctionLikeDeclaration, contextualMapper: TypeMapper): Type[] {
-            const isAsync = isAsyncFunctionLike(func);
+        function checkAndAggregateReturnExpressionTypes(func: FunctionLikeDeclaration, checkMode: CheckMode): Type[] {
+            const functionFlags = getFunctionFlags(func);
             const aggregatedTypes: Type[] = [];
             let hasReturnWithNoExpression = functionHasImplicitReturn(func);
             let hasReturnOfTypeNever = false;
             forEachReturnStatement(<Block>func.body, returnStatement => {
                 const expr = returnStatement.expression;
                 if (expr) {
-                    let type = checkExpressionCached(expr, contextualMapper);
-                    if (isAsync) {
+                    let type = checkExpressionCached(expr, checkMode);
+                    if (functionFlags & FunctionFlags.Async) {
                         // From within an async function you can return either a non-promise value or a promise. Any
                         // Promise/A+ compatible implementation will always assimilate any foreign promise, so the
                         // return type of the body should be unwrapped to its awaited type, which should be wrapped in
                         // the native Promise<T> type by the caller.
-                        type = checkAwaitedType(type, func, Diagnostics.Return_expression_in_async_function_does_not_have_a_valid_callable_then_member);
+                        type = checkAwaitedType(type, func, Diagnostics.The_return_type_of_an_async_function_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member);
                     }
                     if (type.flags & TypeFlags.Never) {
                         hasReturnOfTypeNever = true;
@@ -12866,16 +16569,16 @@ namespace ts {
             const hasExplicitReturn = func.flags & NodeFlags.HasExplicitReturn;
 
             if (returnType && returnType.flags & TypeFlags.Never) {
-                error(func.type, Diagnostics.A_function_returning_never_cannot_have_a_reachable_end_point);
+                error(getEffectiveReturnTypeNode(func), Diagnostics.A_function_returning_never_cannot_have_a_reachable_end_point);
             }
             else if (returnType && !hasExplicitReturn) {
                 // minimal check: function has syntactic return type annotation and no explicit return statements in the body
                 // this function does not conform to the specification.
                 // NOTE: having returnType !== undefined is a precondition for entering this branch so func.type will always be present
-                error(func.type, Diagnostics.A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value);
+                error(getEffectiveReturnTypeNode(func), Diagnostics.A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value);
             }
             else if (returnType && strictNullChecks && !isTypeAssignableTo(undefinedType, returnType)) {
-                error(func.type, Diagnostics.Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined);
+                error(getEffectiveReturnTypeNode(func), Diagnostics.Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined);
             }
             else if (compilerOptions.noImplicitReturns) {
                 if (!returnType) {
@@ -12890,11 +16593,11 @@ namespace ts {
                         return;
                     }
                 }
-                error(func.type || func, Diagnostics.Not_all_code_paths_return_a_value);
+                error(getEffectiveReturnTypeNode(func) || func, Diagnostics.Not_all_code_paths_return_a_value);
             }
         }
 
-        function checkFunctionExpressionOrObjectLiteralMethod(node: FunctionExpression | MethodDeclaration, contextualMapper?: TypeMapper): Type {
+        function checkFunctionExpressionOrObjectLiteralMethod(node: FunctionExpression | MethodDeclaration, checkMode?: CheckMode): Type {
             Debug.assert(node.kind !== SyntaxKind.MethodDeclaration || isObjectLiteralMethod(node));
 
             // Grammar checking
@@ -12904,50 +16607,49 @@ namespace ts {
             }
 
             // The identityMapper object is used to indicate that function expressions are wildcards
-            if (contextualMapper === identityMapper && isContextSensitive(node)) {
+            if (checkMode === CheckMode.SkipContextSensitive && isContextSensitive(node)) {
                 checkNodeDeferred(node);
                 return anyFunctionType;
             }
 
             const links = getNodeLinks(node);
             const type = getTypeOfSymbol(node.symbol);
-            const contextSensitive = isContextSensitive(node);
-            const mightFixTypeParameters = contextSensitive && isInferentialContext(contextualMapper);
 
             // Check if function expression is contextually typed and assign parameter types if so.
-            // See the comment in assignTypeToParameterAndFixTypeParameters to understand why we need to
-            // check mightFixTypeParameters.
-            if (mightFixTypeParameters || !(links.flags & NodeCheckFlags.ContextChecked)) {
+            if (!(links.flags & NodeCheckFlags.ContextChecked)) {
                 const contextualSignature = getContextualSignature(node);
                 // If a type check is started at a function expression that is an argument of a function call, obtaining the
                 // contextual type may recursively get back to here during overload resolution of the call. If so, we will have
                 // already assigned contextual types.
-                const contextChecked = !!(links.flags & NodeCheckFlags.ContextChecked);
-                if (mightFixTypeParameters || !contextChecked) {
+                if (!(links.flags & NodeCheckFlags.ContextChecked)) {
                     links.flags |= NodeCheckFlags.ContextChecked;
                     if (contextualSignature) {
                         const signature = getSignaturesOfType(type, SignatureKind.Call)[0];
-                        if (contextSensitive) {
-                            assignContextualParameterTypes(signature, contextualSignature, contextualMapper || identityMapper);
+                        if (isContextSensitive(node)) {
+                            const contextualMapper = getContextualMapper(node);
+                            if (checkMode === CheckMode.Inferential) {
+                                inferFromAnnotatedParameters(signature, contextualSignature, contextualMapper);
+                            }
+                            const instantiatedContextualSignature = contextualMapper === identityMapper ?
+                                contextualSignature : instantiateSignature(contextualSignature, contextualMapper);
+                            assignContextualParameterTypes(signature, instantiatedContextualSignature);
                         }
-                        if (mightFixTypeParameters || !node.type && !signature.resolvedReturnType) {
-                            const returnType = getReturnTypeFromBody(node, contextualMapper);
+                        if (!getEffectiveReturnTypeNode(node) && !signature.resolvedReturnType) {
+                            const returnType = getReturnTypeFromBody(node, checkMode);
                             if (!signature.resolvedReturnType) {
                                 signature.resolvedReturnType = returnType;
                             }
                         }
                     }
-
-                    if (!contextChecked) {
-                        checkSignatureDeclaration(node);
-                        checkNodeDeferred(node);
-                    }
+                    checkSignatureDeclaration(node);
+                    checkNodeDeferred(node);
                 }
             }
 
-            if (produceDiagnostics && node.kind !== SyntaxKind.MethodDeclaration && node.kind !== SyntaxKind.MethodSignature) {
+            if (produceDiagnostics && node.kind !== SyntaxKind.MethodDeclaration) {
                 checkCollisionWithCapturedSuperVariable(node, (<FunctionExpression>node).name);
                 checkCollisionWithCapturedThisVariable(node, (<FunctionExpression>node).name);
+                checkCollisionWithCapturedNewTargetVariable(node, (<FunctionExpression>node).name);
             }
 
             return type;
@@ -12956,15 +16658,20 @@ namespace ts {
         function checkFunctionExpressionOrObjectLiteralMethodDeferred(node: ArrowFunction | FunctionExpression | MethodDeclaration) {
             Debug.assert(node.kind !== SyntaxKind.MethodDeclaration || isObjectLiteralMethod(node));
 
-            const isAsync = isAsyncFunctionLike(node);
-            const returnOrPromisedType = node.type && (isAsync ? checkAsyncFunctionReturnType(node) : getTypeFromTypeNode(node.type));
-            if (!node.asteriskToken) {
+            const functionFlags = getFunctionFlags(node);
+            const returnTypeNode = getEffectiveReturnTypeNode(node);
+            const returnOrPromisedType = returnTypeNode &&
+                ((functionFlags & FunctionFlags.AsyncGenerator) === FunctionFlags.Async ?
+                    checkAsyncFunctionReturnType(node) : // Async function
+                    getTypeFromTypeNode(returnTypeNode)); // AsyncGenerator function, Generator function, or normal function
+
+            if ((functionFlags & FunctionFlags.Generator) === 0) { // Async function or normal function
                 // return is not necessary in the body of generators
                 checkAllCodePathsInNonVoidFunctionReturnOrThrow(node, returnOrPromisedType);
             }
 
             if (node.body) {
-                if (!node.type) {
+                if (!returnTypeNode) {
                     // There are some checks that are only performed in getReturnTypeFromBody, that may produce errors
                     // we need. An example is the noImplicitAny errors resulting from widening the return expression
                     // of a function. Because checking of function expression bodies is deferred, there was never an
@@ -12984,11 +16691,11 @@ namespace ts {
                     // its return type annotation.
                     const exprType = checkExpression(<Expression>node.body);
                     if (returnOrPromisedType) {
-                        if (isAsync) {
-                            const awaitedType = checkAwaitedType(exprType, node.body, Diagnostics.Expression_body_for_async_arrow_function_does_not_have_a_valid_callable_then_member);
+                        if ((functionFlags & FunctionFlags.AsyncGenerator) === FunctionFlags.Async) { // Async function
+                            const awaitedType = checkAwaitedType(exprType, node.body, Diagnostics.The_return_type_of_an_async_function_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member);
                             checkTypeAssignableTo(awaitedType, returnOrPromisedType, node.body);
                         }
-                        else {
+                        else { // Normal function
                             checkTypeAssignableTo(exprType, returnOrPromisedType, node.body);
                         }
                     }
@@ -13012,11 +16719,11 @@ namespace ts {
             // Get accessors without matching set accessors
             // Enum members
             // Unions and intersections of the above (unions and intersections eagerly set isReadonly on creation)
-            return symbol.isReadonly ||
-                symbol.flags & SymbolFlags.Property && (getDeclarationModifierFlagsFromSymbol(symbol) & ModifierFlags.Readonly) !== 0 ||
-                symbol.flags & SymbolFlags.Variable && (getDeclarationNodeFlagsFromSymbol(symbol) & NodeFlags.Const) !== 0 ||
+            return !!(getCheckFlags(symbol) & CheckFlags.Readonly ||
+                symbol.flags & SymbolFlags.Property && getDeclarationModifierFlagsFromSymbol(symbol) & ModifierFlags.Readonly ||
+                symbol.flags & SymbolFlags.Variable && getDeclarationNodeFlagsFromSymbol(symbol) & NodeFlags.Const ||
                 symbol.flags & SymbolFlags.Accessor && !(symbol.flags & SymbolFlags.SetAccessor) ||
-                (symbol.flags & SymbolFlags.EnumMember) !== 0;
+                symbol.flags & SymbolFlags.EnumMember);
         }
 
         function isReferenceToReadonlyEntity(expr: Expression, symbol: Symbol): boolean {
@@ -13027,8 +16734,9 @@ namespace ts {
                     (expr as PropertyAccessExpression | ElementAccessExpression).expression.kind === SyntaxKind.ThisKeyword) {
                     // Look for if this is the constructor for the class that `symbol` is a property of.
                     const func = getContainingFunction(expr);
-                    if (!(func && func.kind === SyntaxKind.Constructor))
+                    if (!(func && func.kind === SyntaxKind.Constructor)) {
                         return true;
+                    }
                     // If func.parent is a class and symbol is a (readonly) property of that class, or
                     // if func is a constructor and symbol is a (readonly) parameter property declared in it,
                     // then symbol is writeable here.
@@ -13041,7 +16749,7 @@ namespace ts {
 
         function isReferenceThroughNamespaceImport(expr: Expression): boolean {
             if (expr.kind === SyntaxKind.PropertyAccessExpression || expr.kind === SyntaxKind.ElementAccessExpression) {
-                const node = skipParenthesizedNodes((expr as PropertyAccessExpression | ElementAccessExpression).expression);
+                const node = skipParentheses((expr as PropertyAccessExpression | ElementAccessExpression).expression);
                 if (node.kind === SyntaxKind.Identifier) {
                     const symbol = getNodeLinks(node).resolvedSymbol;
                     if (symbol.flags & SymbolFlags.Alias) {
@@ -13051,51 +16759,36 @@ namespace ts {
                 }
             }
             return false;
-        }
-
-        function checkReferenceExpression(expr: Expression, invalidReferenceMessage: DiagnosticMessage, constantVariableMessage: DiagnosticMessage): boolean {
-            // References are combinations of identifiers, parentheses, and property accesses.
-            const node = skipParenthesizedNodes(expr);
-            if (node.kind !== SyntaxKind.Identifier && node.kind !== SyntaxKind.PropertyAccessExpression && node.kind !== SyntaxKind.ElementAccessExpression) {
-                error(expr, invalidReferenceMessage);
-                return false;
-            }
-            // Because we get the symbol from the resolvedSymbol property, it might be of kind
-            // SymbolFlags.ExportValue. In this case it is necessary to get the actual export
-            // symbol, which will have the correct flags set on it.
-            const links = getNodeLinks(node);
-            const symbol = getExportSymbolOfValueSymbolIfExported(links.resolvedSymbol);
-            if (symbol) {
-                if (symbol !== unknownSymbol && symbol !== argumentsSymbol) {
-                    // Only variables (and not functions, classes, namespaces, enum objects, or enum members)
-                    // are considered references when referenced using a simple identifier.
-                    if (node.kind === SyntaxKind.Identifier && !(symbol.flags & SymbolFlags.Variable)) {
-                        error(expr, invalidReferenceMessage);
-                        return false;
-                    }
-                    if (isReferenceToReadonlyEntity(node, symbol) || isReferenceThroughNamespaceImport(node)) {
-                        error(expr, constantVariableMessage);
-                        return false;
-                    }
-                }
-            }
-            else if (node.kind === SyntaxKind.ElementAccessExpression) {
-                if (links.resolvedIndexInfo && links.resolvedIndexInfo.isReadonly) {
-                    error(expr, constantVariableMessage);
-                    return false;
-                }
+        }
+
+        function checkReferenceExpression(expr: Expression, invalidReferenceMessage: DiagnosticMessage): boolean {
+            // References are combinations of identifiers, parentheses, and property accesses.
+            const node = skipOuterExpressions(expr, OuterExpressionKinds.Assertions | OuterExpressionKinds.Parentheses);
+            if (node.kind !== SyntaxKind.Identifier && node.kind !== SyntaxKind.PropertyAccessExpression && node.kind !== SyntaxKind.ElementAccessExpression) {
+                error(expr, invalidReferenceMessage);
+                return false;
             }
             return true;
         }
 
         function checkDeleteExpression(node: DeleteExpression): Type {
             checkExpression(node.expression);
+            const expr = skipParentheses(node.expression);
+            if (expr.kind !== SyntaxKind.PropertyAccessExpression && expr.kind !== SyntaxKind.ElementAccessExpression) {
+                error(expr, Diagnostics.The_operand_of_a_delete_operator_must_be_a_property_reference);
+                return booleanType;
+            }
+            const links = getNodeLinks(expr);
+            const symbol = getExportSymbolOfValueSymbolIfExported(links.resolvedSymbol);
+            if (symbol && isReadonlySymbol(symbol)) {
+                error(expr, Diagnostics.The_operand_of_a_delete_operator_cannot_be_a_read_only_property);
+            }
             return booleanType;
         }
 
         function checkTypeOfExpression(node: TypeOfExpression): Type {
             checkExpression(node.expression);
-            return stringType;
+            return typeofType;
         }
 
         function checkVoidExpression(node: VoidExpression): Type {
@@ -13116,7 +16809,7 @@ namespace ts {
             }
 
             const operandType = checkExpression(node.expression);
-            return checkAwaitedType(operandType, node);
+            return checkAwaitedType(operandType, node, Diagnostics.Type_of_await_operand_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member);
         }
 
         function checkPrefixUnaryExpression(node: PrefixUnaryExpression): Type {
@@ -13125,12 +16818,13 @@ namespace ts {
                 return silentNeverType;
             }
             if (node.operator === SyntaxKind.MinusToken && node.operand.kind === SyntaxKind.NumericLiteral) {
-                return getFreshTypeOfLiteralType(getLiteralTypeForText(TypeFlags.NumberLiteral, "" + -(<LiteralExpression>node.operand).text));
+                return getFreshTypeOfLiteralType(getLiteralType(-(<LiteralExpression>node.operand).text));
             }
             switch (node.operator) {
                 case SyntaxKind.PlusToken:
                 case SyntaxKind.MinusToken:
                 case SyntaxKind.TildeToken:
+                    checkNonNullType(operandType, node.operand);
                     if (maybeTypeOfKind(operandType, TypeFlags.ESSymbol)) {
                         error(node.operand, Diagnostics.The_0_operator_cannot_be_applied_to_type_symbol, tokenToString(node.operator));
                     }
@@ -13142,13 +16836,11 @@ namespace ts {
                         booleanType;
                 case SyntaxKind.PlusPlusToken:
                 case SyntaxKind.MinusMinusToken:
-                    const ok = checkArithmeticOperandType(node.operand, getNonNullableType(operandType),
+                    const ok = checkArithmeticOperandType(node.operand, checkNonNullType(operandType, node.operand),
                         Diagnostics.An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type);
                     if (ok) {
                         // run check only if former checks succeeded to avoid reporting cascading errors
-                        checkReferenceExpression(node.operand,
-                            Diagnostics.The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer,
-                            Diagnostics.The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property);
+                        checkReferenceExpression(node.operand, Diagnostics.The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_or_a_property_access);
                     }
                     return numberType;
             }
@@ -13160,13 +16852,11 @@ namespace ts {
             if (operandType === silentNeverType) {
                 return silentNeverType;
             }
-            const ok = checkArithmeticOperandType(node.operand, getNonNullableType(operandType),
+            const ok = checkArithmeticOperandType(node.operand, checkNonNullType(operandType, node.operand),
                 Diagnostics.An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type);
             if (ok) {
                 // run check only if former checks succeeded to avoid reporting cascading errors
-                checkReferenceExpression(node.operand,
-                    Diagnostics.The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer,
-                    Diagnostics.The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property);
+                checkReferenceExpression(node.operand, Diagnostics.The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_or_a_property_access);
             }
             return numberType;
         }
@@ -13216,7 +16906,7 @@ namespace ts {
         }
 
         function isConstEnumObjectType(type: Type): boolean {
-            return type.flags & (TypeFlags.ObjectType | TypeFlags.Anonymous) && type.symbol && isConstEnumSymbol(type.symbol);
+            return getObjectFlags(type) & ObjectFlags.Anonymous && type.symbol && isConstEnumSymbol(type.symbol);
         }
 
         function isConstEnumSymbol(symbol: Symbol): boolean {
@@ -13229,14 +16919,17 @@ namespace ts {
             }
             // TypeScript 1.0 spec (April 2014): 4.15.4
             // The instanceof operator requires the left operand to be of type Any, an object type, or a type parameter type,
-            // and the right operand to be of type Any or a subtype of the 'Function' interface type.
+            // and the right operand to be of type Any, a subtype of the 'Function' interface type, or have a call or construct signature.
             // The result is always of the Boolean primitive type.
             // NOTE: do not raise error if leftType is unknown as related error was already reported
             if (isTypeOfKind(leftType, TypeFlags.Primitive)) {
                 error(left, Diagnostics.The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_parameter);
             }
             // NOTE: do not raise error if right is unknown as related error was already reported
-            if (!(isTypeAny(rightType) || isTypeSubtypeOf(rightType, globalFunctionType))) {
+            if (!(isTypeAny(rightType) ||
+                  getSignaturesOfType(rightType, SignatureKind.Call).length ||
+                  getSignaturesOfType(rightType, SignatureKind.Construct).length ||
+                  isTypeSubtypeOf(rightType, globalFunctionType))) {
                 error(right, Diagnostics.The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_Function_interface_type);
             }
             return booleanType;
@@ -13246,28 +16939,31 @@ namespace ts {
             if (leftType === silentNeverType || rightType === silentNeverType) {
                 return silentNeverType;
             }
+            leftType = checkNonNullType(leftType, left);
+            rightType = checkNonNullType(rightType, right);
             // TypeScript 1.0 spec (April 2014): 4.15.5
             // The in operator requires the left operand to be of type Any, the String primitive type, or the Number primitive type,
             // and the right operand to be of type Any, an object type, or a type parameter type.
             // The result is always of the Boolean primitive type.
-            if (!isTypeAnyOrAllConstituentTypesHaveKind(leftType, TypeFlags.StringLike | TypeFlags.NumberLike | TypeFlags.ESSymbol)) {
+            if (!(isTypeComparableTo(leftType, stringType) || isTypeOfKind(leftType, TypeFlags.NumberLike | TypeFlags.ESSymbol))) {
                 error(left, Diagnostics.The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol);
             }
-            if (!isTypeAnyOrAllConstituentTypesHaveKind(rightType, TypeFlags.ObjectType | TypeFlags.TypeParameter)) {
+            if (!isTypeAnyOrAllConstituentTypesHaveKind(rightType, TypeFlags.Object | TypeFlags.TypeVariable | TypeFlags.NonPrimitive)) {
                 error(right, Diagnostics.The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter);
             }
             return booleanType;
         }
 
-        function checkObjectLiteralAssignment(node: ObjectLiteralExpression, sourceType: Type, contextualMapper?: TypeMapper): Type {
+        function checkObjectLiteralAssignment(node: ObjectLiteralExpression, sourceType: Type): Type {
             const properties = node.properties;
             for (const p of properties) {
-                checkObjectLiteralDestructuringPropertyAssignment(sourceType, p, contextualMapper);
+                checkObjectLiteralDestructuringPropertyAssignment(sourceType, p, properties);
             }
             return sourceType;
         }
 
-        function checkObjectLiteralDestructuringPropertyAssignment(objectLiteralType: Type, property: ObjectLiteralElementLike, contextualMapper?: TypeMapper) {
+        /** Note: If property cannot be a SpreadAssignment, then allProperties does not need to be provided */
+        function checkObjectLiteralDestructuringPropertyAssignment(objectLiteralType: Type, property: ObjectLiteralElementLike, allProperties?: ObjectLiteralElementLike[]) {
             if (property.kind === SyntaxKind.PropertyAssignment || property.kind === SyntaxKind.ShorthandPropertyAssignment) {
                 const name = <PropertyName>(<PropertyAssignment>property).name;
                 if (name.kind === SyntaxKind.ComputedPropertyName) {
@@ -13296,29 +16992,46 @@ namespace ts {
                     error(name, Diagnostics.Type_0_has_no_property_1_and_no_string_index_signature, typeToString(objectLiteralType), declarationNameToString(name));
                 }
             }
+            else if (property.kind === SyntaxKind.SpreadAssignment) {
+                if (languageVersion < ScriptTarget.ESNext) {
+                    checkExternalEmitHelpers(property, ExternalEmitHelpers.Rest);
+                }
+                const nonRestNames: PropertyName[] = [];
+                if (allProperties) {
+                    for (let i = 0; i < allProperties.length - 1; i++) {
+                        nonRestNames.push(allProperties[i].name);
+                    }
+                }
+                const type = getRestType(objectLiteralType, nonRestNames, objectLiteralType.symbol);
+                return checkDestructuringAssignment(property.expression, type);
+            }
             else {
                 error(property, Diagnostics.Property_assignment_expected);
             }
         }
 
-        function checkArrayLiteralAssignment(node: ArrayLiteralExpression, sourceType: Type, contextualMapper?: TypeMapper): Type {
+        function checkArrayLiteralAssignment(node: ArrayLiteralExpression, sourceType: Type, checkMode?: CheckMode): Type {
+            if (languageVersion < ScriptTarget.ES2015 && compilerOptions.downlevelIteration) {
+                checkExternalEmitHelpers(node, ExternalEmitHelpers.Read);
+            }
+
             // This elementType will be used if the specific property corresponding to this index is not
             // present (aka the tuple element property). This call also checks that the parentType is in
             // fact an iterable or array (depending on target language).
-            const elementType = checkIteratedTypeOrElementType(sourceType, node, /*allowStringInput*/ false) || unknownType;
+            const elementType = checkIteratedTypeOrElementType(sourceType, node, /*allowStringInput*/ false, /*allowAsyncIterables*/ false) || unknownType;
             const elements = node.elements;
             for (let i = 0; i < elements.length; i++) {
-                checkArrayLiteralDestructuringElementAssignment(node, sourceType, i, elementType, contextualMapper);
+                checkArrayLiteralDestructuringElementAssignment(node, sourceType, i, elementType, checkMode);
             }
             return sourceType;
         }
 
         function checkArrayLiteralDestructuringElementAssignment(node: ArrayLiteralExpression, sourceType: Type,
-            elementIndex: number, elementType: Type, contextualMapper?: TypeMapper) {
+            elementIndex: number, elementType: Type, checkMode?: CheckMode) {
             const elements = node.elements;
             const element = elements[elementIndex];
             if (element.kind !== SyntaxKind.OmittedExpression) {
-                if (element.kind !== SyntaxKind.SpreadElementExpression) {
+                if (element.kind !== SyntaxKind.SpreadElement) {
                     const propName = "" + elementIndex;
                     const type = isTypeAny(sourceType)
                         ? sourceType
@@ -13326,7 +17039,7 @@ namespace ts {
                             ? getTypeOfPropertyOfType(sourceType, propName)
                             : elementType;
                     if (type) {
-                        return checkDestructuringAssignment(element, type, contextualMapper);
+                        return checkDestructuringAssignment(element, type, checkMode);
                     }
                     else {
                         // We still need to check element expression here because we may need to set appropriate flag on the expression
@@ -13342,15 +17055,15 @@ namespace ts {
                 }
                 else {
                     if (elementIndex < elements.length - 1) {
-                        error(element, Diagnostics.A_rest_element_must_be_last_in_an_array_destructuring_pattern);
+                        error(element, Diagnostics.A_rest_element_must_be_last_in_a_destructuring_pattern);
                     }
                     else {
-                        const restExpression = (<SpreadElementExpression>element).expression;
+                        const restExpression = (<SpreadElement>element).expression;
                         if (restExpression.kind === SyntaxKind.BinaryExpression && (<BinaryExpression>restExpression).operatorToken.kind === SyntaxKind.EqualsToken) {
                             error((<BinaryExpression>restExpression).operatorToken, Diagnostics.A_rest_element_cannot_have_an_initializer);
                         }
                         else {
-                            return checkDestructuringAssignment(restExpression, createArrayType(elementType), contextualMapper);
+                            return checkDestructuringAssignment(restExpression, createArrayType(elementType), checkMode);
                         }
                     }
                 }
@@ -13358,7 +17071,7 @@ namespace ts {
             return undefined;
         }
 
-        function checkDestructuringAssignment(exprOrAssignment: Expression | ShorthandPropertyAssignment, sourceType: Type, contextualMapper?: TypeMapper): Type {
+        function checkDestructuringAssignment(exprOrAssignment: Expression | ShorthandPropertyAssignment, sourceType: Type, checkMode?: CheckMode): Type {
             let target: Expression;
             if (exprOrAssignment.kind === SyntaxKind.ShorthandPropertyAssignment) {
                 const prop = <ShorthandPropertyAssignment>exprOrAssignment;
@@ -13369,7 +17082,7 @@ namespace ts {
                         !(getFalsyFlags(checkExpression(prop.objectAssignmentInitializer)) & TypeFlags.Undefined)) {
                         sourceType = getTypeWithFacts(sourceType, TypeFacts.NEUndefined);
                     }
-                    checkBinaryLikeExpression(prop.name, prop.equalsToken, prop.objectAssignmentInitializer, contextualMapper);
+                    checkBinaryLikeExpression(prop.name, prop.equalsToken, prop.objectAssignmentInitializer, checkMode);
                 }
                 target = (<ShorthandPropertyAssignment>exprOrAssignment).name;
             }
@@ -13378,21 +17091,24 @@ namespace ts {
             }
 
             if (target.kind === SyntaxKind.BinaryExpression && (<BinaryExpression>target).operatorToken.kind === SyntaxKind.EqualsToken) {
-                checkBinaryExpression(<BinaryExpression>target, contextualMapper);
+                checkBinaryExpression(<BinaryExpression>target, checkMode);
                 target = (<BinaryExpression>target).left;
             }
             if (target.kind === SyntaxKind.ObjectLiteralExpression) {
-                return checkObjectLiteralAssignment(<ObjectLiteralExpression>target, sourceType, contextualMapper);
+                return checkObjectLiteralAssignment(<ObjectLiteralExpression>target, sourceType);
             }
             if (target.kind === SyntaxKind.ArrayLiteralExpression) {
-                return checkArrayLiteralAssignment(<ArrayLiteralExpression>target, sourceType, contextualMapper);
+                return checkArrayLiteralAssignment(<ArrayLiteralExpression>target, sourceType, checkMode);
             }
-            return checkReferenceAssignment(target, sourceType, contextualMapper);
+            return checkReferenceAssignment(target, sourceType, checkMode);
         }
 
-        function checkReferenceAssignment(target: Expression, sourceType: Type, contextualMapper?: TypeMapper): Type {
-            const targetType = checkExpression(target, contextualMapper);
-            if (checkReferenceExpression(target, Diagnostics.Invalid_left_hand_side_of_assignment_expression, Diagnostics.Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property)) {
+        function checkReferenceAssignment(target: Expression, sourceType: Type, checkMode?: CheckMode): Type {
+            const targetType = checkExpression(target, checkMode);
+            const error = target.parent.kind === SyntaxKind.SpreadAssignment ?
+                Diagnostics.The_target_of_an_object_rest_assignment_must_be_a_variable_or_a_property_access :
+                Diagnostics.The_left_hand_side_of_an_assignment_expression_must_be_a_variable_or_a_property_access;
+            if (checkReferenceExpression(target, error)) {
                 checkTypeAssignableTo(sourceType, targetType, target, /*headMessage*/ undefined);
             }
             return sourceType;
@@ -13476,17 +17192,17 @@ namespace ts {
                 getUnionType([type1, type2], /*subtypeReduction*/ true);
         }
 
-        function checkBinaryExpression(node: BinaryExpression, contextualMapper?: TypeMapper) {
-            return checkBinaryLikeExpression(node.left, node.operatorToken, node.right, contextualMapper, node);
+        function checkBinaryExpression(node: BinaryExpression, checkMode?: CheckMode) {
+            return checkBinaryLikeExpression(node.left, node.operatorToken, node.right, checkMode, node);
         }
 
-        function checkBinaryLikeExpression(left: Expression, operatorToken: Node, right: Expression, contextualMapper?: TypeMapper, errorNode?: Node) {
+        function checkBinaryLikeExpression(left: Expression, operatorToken: Node, right: Expression, checkMode?: CheckMode, errorNode?: Node) {
             const operator = operatorToken.kind;
             if (operator === SyntaxKind.EqualsToken && (left.kind === SyntaxKind.ObjectLiteralExpression || left.kind === SyntaxKind.ArrayLiteralExpression)) {
-                return checkDestructuringAssignment(left, checkExpression(right, contextualMapper), contextualMapper);
+                return checkDestructuringAssignment(left, checkExpression(right, checkMode), checkMode);
             }
-            let leftType = checkExpression(left, contextualMapper);
-            let rightType = checkExpression(right, contextualMapper);
+            let leftType = checkExpression(left, checkMode);
+            let rightType = checkExpression(right, checkMode);
             switch (operator) {
                 case SyntaxKind.AsteriskToken:
                 case SyntaxKind.AsteriskAsteriskToken:
@@ -13513,17 +17229,9 @@ namespace ts {
                     if (leftType === silentNeverType || rightType === silentNeverType) {
                         return silentNeverType;
                     }
-                    // TypeScript 1.0 spec (April 2014): 4.19.1
-                    // These operators require their operands to be of type Any, the Number primitive type,
-                    // or an enum type. Operands of an enum type are treated
-                    // as having the primitive type Number. If one operand is the null or undefined value,
-                    // it is treated as having the type of the other operand.
-                    // The result is always of the Number primitive type.
-                    if (leftType.flags & TypeFlags.Nullable) leftType = rightType;
-                    if (rightType.flags & TypeFlags.Nullable) rightType = leftType;
 
-                    leftType = getNonNullableType(leftType);
-                    rightType = getNonNullableType(rightType);
+                    leftType = checkNonNullType(leftType, left);
+                    rightType = checkNonNullType(rightType, right);
 
                     let suggestedOperator: SyntaxKind;
                     // if a user tries to apply a bitwise operator to 2 boolean operands
@@ -13548,16 +17256,11 @@ namespace ts {
                     if (leftType === silentNeverType || rightType === silentNeverType) {
                         return silentNeverType;
                     }
-                    // TypeScript 1.0 spec (April 2014): 4.19.2
-                    // The binary + operator requires both operands to be of the Number primitive type or an enum type,
-                    // or at least one of the operands to be of type Any or the String primitive type.
 
-                    // If one operand is the null or undefined value, it is treated as having the type of the other operand.
-                    if (leftType.flags & TypeFlags.Nullable) leftType = rightType;
-                    if (rightType.flags & TypeFlags.Nullable) rightType = leftType;
-
-                    leftType = getNonNullableType(leftType);
-                    rightType = getNonNullableType(rightType);
+                    if (!isTypeOfKind(leftType, TypeFlags.Any | TypeFlags.StringLike) && !isTypeOfKind(rightType, TypeFlags.Any | TypeFlags.StringLike)) {
+                        leftType = checkNonNullType(leftType, left);
+                        rightType = checkNonNullType(rightType, right);
+                    }
 
                     let resultType: Type;
                     if (isTypeOfKind(leftType, TypeFlags.NumberLike) && isTypeOfKind(rightType, TypeFlags.NumberLike)) {
@@ -13596,6 +17299,8 @@ namespace ts {
                 case SyntaxKind.LessThanEqualsToken:
                 case SyntaxKind.GreaterThanEqualsToken:
                     if (checkForDisallowedESSymbolOperand(operator)) {
+                        leftType = getBaseTypeOfLiteralType(checkNonNullType(leftType, left));
+                        rightType = getBaseTypeOfLiteralType(checkNonNullType(rightType, right));
                         if (!isTypeComparableTo(leftType, rightType) && !isTypeComparableTo(rightType, leftType)) {
                             reportOperatorError();
                         }
@@ -13621,7 +17326,7 @@ namespace ts {
                     return checkInExpression(left, right, leftType, rightType);
                 case SyntaxKind.AmpersandAmpersandToken:
                     return getTypeFacts(leftType) & TypeFacts.Truthy ?
-                        includeFalsyTypes(rightType, getFalsyFlags(strictNullChecks ? leftType : getBaseTypeOfLiteralType(rightType))) :
+                        getUnionType([extractDefinitelyFalsyTypes(strictNullChecks ? leftType : getBaseTypeOfLiteralType(rightType)), rightType]) :
                         leftType;
                 case SyntaxKind.BarBarToken:
                     return getTypeFacts(leftType) & TypeFacts.Falsy ?
@@ -13631,12 +17336,16 @@ namespace ts {
                     checkAssignmentOperator(rightType);
                     return getRegularTypeOfObjectLiteral(rightType);
                 case SyntaxKind.CommaToken:
-                    if (!compilerOptions.allowUnreachableCode && isSideEffectFree(left)) {
+                    if (!compilerOptions.allowUnreachableCode && isSideEffectFree(left) && !isEvalNode(right)) {
                         error(left, Diagnostics.Left_side_of_comma_operator_is_unused_and_has_no_side_effects);
                     }
                     return rightType;
             }
 
+            function isEvalNode(node: Expression) {
+                return node.kind === SyntaxKind.Identifier && (node as Identifier).text === "eval";
+            }
+
             // Return true if there was no error, false if there was an error.
             function checkForDisallowedESSymbolOperand(operator: SyntaxKind): boolean {
                 const offendingSymbolOperand =
@@ -13668,18 +17377,14 @@ namespace ts {
             }
 
             function checkAssignmentOperator(valueType: Type): void {
-                if (produceDiagnostics && operator >= SyntaxKind.FirstAssignment && operator <= SyntaxKind.LastAssignment) {
+                if (produceDiagnostics && isAssignmentOperator(operator)) {
                     // TypeScript 1.0 spec (April 2014): 4.17
                     // An assignment of the form
                     //    VarExpr = ValueExpr
                     // requires VarExpr to be classified as a reference
                     // A compound assignment furthermore requires VarExpr to be classified as a reference (section 4.1)
                     // and the type of the non - compound operation to be assignable to the type of VarExpr.
-                    const ok = checkReferenceExpression(left,
-                        Diagnostics.Invalid_left_hand_side_of_assignment_expression,
-                        Diagnostics.Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property);
-                    // Use default messages
-                    if (ok) {
+                    if (checkReferenceExpression(left, Diagnostics.The_left_hand_side_of_an_assignment_expression_must_be_a_variable_or_a_property_access)) {
                         // to avoid cascading errors check assignability only if 'isReference' check succeeded and no errors were reported
                         checkTypeAssignableTo(valueType, leftType, left, /*headMessage*/ undefined);
                     }
@@ -13725,23 +17430,53 @@ namespace ts {
                 const func = getContainingFunction(node);
                 // If the user's code is syntactically correct, the func should always have a star. After all,
                 // we are in a yield context.
-                if (func && func.asteriskToken) {
+                const functionFlags = func && getFunctionFlags(func);
+                if (node.asteriskToken) {
+                    // Async generator functions prior to ESNext require the __await, __asyncDelegator,
+                    // and __asyncValues helpers
+                    if ((functionFlags & FunctionFlags.AsyncGenerator) === FunctionFlags.AsyncGenerator &&
+                        languageVersion < ScriptTarget.ESNext) {
+                        checkExternalEmitHelpers(node, ExternalEmitHelpers.AsyncDelegatorIncludes);
+                    }
+
+                    // Generator functions prior to ES2015 require the __values helper
+                    if ((functionFlags & FunctionFlags.AsyncGenerator) === FunctionFlags.Generator &&
+                        languageVersion < ScriptTarget.ES2015 && compilerOptions.downlevelIteration) {
+                        checkExternalEmitHelpers(node, ExternalEmitHelpers.Values);
+                    }
+                }
+
+                if (functionFlags & FunctionFlags.Generator) {
                     const expressionType = checkExpressionCached(node.expression, /*contextualMapper*/ undefined);
                     let expressionElementType: Type;
                     const nodeIsYieldStar = !!node.asteriskToken;
                     if (nodeIsYieldStar) {
-                        expressionElementType = checkElementTypeOfIterable(expressionType, node.expression);
+                        expressionElementType = checkIteratedTypeOrElementType(expressionType, node.expression, /*allowStringInput*/ false, (functionFlags & FunctionFlags.Async) !== 0);
                     }
+
                     // There is no point in doing an assignability check if the function
                     // has no explicit return type because the return type is directly computed
                     // from the yield expressions.
-                    if (func.type) {
-                        const signatureElementType = getElementTypeOfIterableIterator(getTypeFromTypeNode(func.type)) || anyType;
+                    const returnType = getEffectiveReturnTypeNode(func);
+                    if (returnType) {
+                        const signatureElementType = getIteratedTypeOfGenerator(getTypeFromTypeNode(returnType), (functionFlags & FunctionFlags.Async) !== 0) || anyType;
                         if (nodeIsYieldStar) {
-                            checkTypeAssignableTo(expressionElementType, signatureElementType, node.expression, /*headMessage*/ undefined);
+                            checkTypeAssignableTo(
+                                functionFlags & FunctionFlags.Async
+                                    ? getAwaitedType(expressionElementType, node.expression, Diagnostics.Type_of_iterated_elements_of_a_yield_Asterisk_operand_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member)
+                                    : expressionElementType,
+                                signatureElementType,
+                                node.expression,
+                                /*headMessage*/ undefined);
                         }
                         else {
-                            checkTypeAssignableTo(expressionType, signatureElementType, node.expression, /*headMessage*/ undefined);
+                            checkTypeAssignableTo(
+                                functionFlags & FunctionFlags.Async
+                                    ? getAwaitedType(expressionType, node.expression, Diagnostics.Type_of_yield_operand_in_an_async_generator_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member)
+                                    : expressionType,
+                                signatureElementType,
+                                node.expression,
+                                /*headMessage*/ undefined);
                         }
                     }
                 }
@@ -13751,10 +17486,10 @@ namespace ts {
             return anyType;
         }
 
-        function checkConditionalExpression(node: ConditionalExpression, contextualMapper?: TypeMapper): Type {
+        function checkConditionalExpression(node: ConditionalExpression, checkMode?: CheckMode): Type {
             checkExpression(node.condition);
-            const type1 = checkExpression(node.whenTrue, contextualMapper);
-            const type2 = checkExpression(node.whenFalse, contextualMapper);
+            const type1 = checkExpression(node.whenTrue, checkMode);
+            const type2 = checkExpression(node.whenFalse, checkMode);
             return getBestChoiceType(type1, type2);
         }
 
@@ -13764,9 +17499,9 @@ namespace ts {
             }
             switch (node.kind) {
                 case SyntaxKind.StringLiteral:
-                    return getFreshTypeOfLiteralType(getLiteralTypeForText(TypeFlags.StringLiteral, (<LiteralExpression>node).text));
+                    return getFreshTypeOfLiteralType(getLiteralType((<LiteralExpression>node).text));
                 case SyntaxKind.NumericLiteral:
-                    return getFreshTypeOfLiteralType(getLiteralTypeForText(TypeFlags.NumberLiteral, (<LiteralExpression>node).text));
+                    return getFreshTypeOfLiteralType(getLiteralType(+(<LiteralExpression>node).text));
                 case SyntaxKind.TrueKeyword:
                     return trueType;
                 case SyntaxKind.FalseKeyword:
@@ -13787,15 +17522,20 @@ namespace ts {
             return stringType;
         }
 
-        function checkExpressionWithContextualType(node: Expression, contextualType: Type, contextualMapper?: TypeMapper): Type {
+        function checkExpressionWithContextualType(node: Expression, contextualType: Type, contextualMapper: TypeMapper): Type {
             const saveContextualType = node.contextualType;
+            const saveContextualMapper = node.contextualMapper;
             node.contextualType = contextualType;
-            const result = checkExpression(node, contextualMapper);
+            node.contextualMapper = contextualMapper;
+            const checkMode = contextualMapper === identityMapper ? CheckMode.SkipContextSensitive :
+                contextualMapper ? CheckMode.Inferential : CheckMode.Normal;
+            const result = checkExpression(node, checkMode);
             node.contextualType = saveContextualType;
+            node.contextualMapper = saveContextualMapper;
             return result;
         }
 
-        function checkExpressionCached(node: Expression, contextualMapper?: TypeMapper): Type {
+        function checkExpressionCached(node: Expression, checkMode?: CheckMode): Type {
             const links = getNodeLinks(node);
             if (!links.resolvedType) {
                 // When computing a type that we're going to cache, we need to ignore any ongoing control flow
@@ -13803,47 +17543,47 @@ namespace ts {
                 // to the top of the stack ensures all transient types are computed from a known point.
                 const saveFlowLoopStart = flowLoopStart;
                 flowLoopStart = flowLoopCount;
-                links.resolvedType = checkExpression(node, contextualMapper);
+                links.resolvedType = checkExpression(node, checkMode);
                 flowLoopStart = saveFlowLoopStart;
             }
             return links.resolvedType;
         }
 
         function isTypeAssertion(node: Expression) {
-            node = skipParenthesizedNodes(node);
+            node = skipParentheses(node);
             return node.kind === SyntaxKind.TypeAssertionExpression || node.kind === SyntaxKind.AsExpression;
         }
 
         function checkDeclarationInitializer(declaration: VariableLikeDeclaration) {
-            const type = checkExpressionCached(declaration.initializer);
+            const type = getTypeOfExpression(declaration.initializer, /*cache*/ true);
             return getCombinedNodeFlags(declaration) & NodeFlags.Const ||
-                getCombinedModifierFlags(declaration) & ModifierFlags.Readonly ||
+                getCombinedModifierFlags(declaration) & ModifierFlags.Readonly && !isParameterPropertyDeclaration(declaration) ||
                 isTypeAssertion(declaration.initializer) ? type : getWidenedLiteralType(type);
         }
 
         function isLiteralContextualType(contextualType: Type) {
             if (contextualType) {
-                if (contextualType.flags & TypeFlags.TypeParameter) {
-                    const apparentType = getApparentTypeOfTypeParameter(<TypeParameter>contextualType);
+                if (contextualType.flags & TypeFlags.TypeVariable) {
+                    const constraint = getBaseConstraintOfType(contextualType) || emptyObjectType;
                     // If the type parameter is constrained to the base primitive type we're checking for,
                     // consider this a literal context. For example, given a type parameter 'T extends string',
                     // this causes us to infer string literal types for T.
-                    if (apparentType.flags & (TypeFlags.String | TypeFlags.Number | TypeFlags.Boolean | TypeFlags.Enum)) {
+                    if (constraint.flags & (TypeFlags.String | TypeFlags.Number | TypeFlags.Boolean | TypeFlags.Enum)) {
                         return true;
                     }
-                    contextualType = apparentType;
+                    contextualType = constraint;
                 }
-                return maybeTypeOfKind(contextualType, TypeFlags.Literal);
+                return maybeTypeOfKind(contextualType, (TypeFlags.Literal | TypeFlags.Index));
             }
             return false;
         }
 
-        function checkExpressionForMutableLocation(node: Expression, contextualMapper?: TypeMapper): Type {
-            const type = checkExpression(node, contextualMapper);
+        function checkExpressionForMutableLocation(node: Expression, checkMode?: CheckMode): Type {
+            const type = checkExpression(node, checkMode);
             return isTypeAssertion(node) || isLiteralContextualType(getContextualType(node)) ? type : getWidenedLiteralType(type);
         }
 
-        function checkPropertyAssignment(node: PropertyAssignment, contextualMapper?: TypeMapper): Type {
+        function checkPropertyAssignment(node: PropertyAssignment, checkMode?: CheckMode): Type {
             // Do not use hasDynamicName here, because that returns false for well known symbols.
             // We want to perform checkComputedPropertyName for all computed properties, including
             // well known symbols.
@@ -13851,10 +17591,10 @@ namespace ts {
                 checkComputedPropertyName(<ComputedPropertyName>node.name);
             }
 
-            return checkExpressionForMutableLocation((<PropertyAssignment>node).initializer, contextualMapper);
+            return checkExpressionForMutableLocation((<PropertyAssignment>node).initializer, checkMode);
         }
 
-        function checkObjectLiteralMethod(node: MethodDeclaration, contextualMapper?: TypeMapper): Type {
+        function checkObjectLiteralMethod(node: MethodDeclaration, checkMode?: CheckMode): Type {
             // Grammar checking
             checkGrammarMethod(node);
 
@@ -13865,19 +17605,19 @@ namespace ts {
                 checkComputedPropertyName(<ComputedPropertyName>node.name);
             }
 
-            const uninstantiatedType = checkFunctionExpressionOrObjectLiteralMethod(node, contextualMapper);
-            return instantiateTypeWithSingleGenericCallSignature(node, uninstantiatedType, contextualMapper);
+            const uninstantiatedType = checkFunctionExpressionOrObjectLiteralMethod(node, checkMode);
+            return instantiateTypeWithSingleGenericCallSignature(node, uninstantiatedType, checkMode);
         }
 
-        function instantiateTypeWithSingleGenericCallSignature(node: Expression | MethodDeclaration, type: Type, contextualMapper?: TypeMapper) {
-            if (isInferentialContext(contextualMapper)) {
+        function instantiateTypeWithSingleGenericCallSignature(node: Expression | MethodDeclaration, type: Type, checkMode?: CheckMode) {
+            if (checkMode === CheckMode.Inferential) {
                 const signature = getSingleCallSignature(type);
                 if (signature && signature.typeParameters) {
                     const contextualType = getApparentTypeOfContextualType(<Expression>node);
                     if (contextualType) {
-                        const contextualSignature = getSingleCallSignature(contextualType);
+                        const contextualSignature = getSingleCallSignature(getNonNullableType(contextualType));
                         if (contextualSignature && !contextualSignature.typeParameters) {
-                            return getOrCreateTypeFromSignature(instantiateSignatureInContextOf(signature, contextualSignature, contextualMapper));
+                            return getOrCreateTypeFromSignature(instantiateSignatureInContextOf(signature, contextualSignature, getContextualMapper(node)));
                         }
                     }
                 }
@@ -13886,6 +17626,43 @@ namespace ts {
             return type;
         }
 
+        /**
+         * Returns the type of an expression. Unlike checkExpression, this function is simply concerned
+         * with computing the type and may not fully check all contained sub-expressions for errors.
+         * A cache argument of true indicates that if the function performs a full type check, it is ok
+         * to cache the result.
+         */
+        function getTypeOfExpression(node: Expression, cache?: boolean) {
+            // Optimize for the common case of a call to a function with a single non-generic call
+            // signature where we can just fetch the return type without checking the arguments.
+            if (node.kind === SyntaxKind.CallExpression && (<CallExpression>node).expression.kind !== SyntaxKind.SuperKeyword && !isRequireCall(node, /*checkArgumentIsStringLiteral*/ true)) {
+                const funcType = checkNonNullExpression((<CallExpression>node).expression);
+                const signature = getSingleCallSignature(funcType);
+                if (signature && !signature.typeParameters) {
+                    return getReturnTypeOfSignature(signature);
+                }
+            }
+            // Otherwise simply call checkExpression. Ideally, the entire family of checkXXX functions
+            // should have a parameter that indicates whether full error checking is required such that
+            // we can perform the optimizations locally.
+            return cache ? checkExpressionCached(node) : checkExpression(node);
+        }
+
+        /**
+         * Returns the type of an expression. Unlike checkExpression, this function is simply concerned
+         * with computing the type and may not fully check all contained sub-expressions for errors.
+         * It is intended for uses where you know there is no contextual type,
+         * and requesting the contextual type might cause a circularity or other bad behaviour.
+         * It sets the contextual type of the node to any before calling getTypeOfExpression.
+         */
+        function getContextFreeTypeOfExpression(node: Expression) {
+            const saveContextualType = node.contextualType;
+            node.contextualType = anyType;
+            const type = getTypeOfExpression(node);
+            node.contextualType = saveContextualType;
+            return type;
+        }
+
         // Checks an expression and returns its type. The contextualMapper parameter serves two purposes: When
         // contextualMapper is not undefined and not equal to the identityMapper function object it indicates that the
         // expression is being inferentially typed (section 4.15.2 in spec) and provides the type mapper to use in
@@ -13893,14 +17670,14 @@ namespace ts {
         // object, it serves as an indicator that all contained function and arrow expressions should be considered to
         // have the wildcard function type; this form of type check is used during overload resolution to exclude
         // contextually typed function and arrow expressions in the initial phase.
-        function checkExpression(node: Expression | QualifiedName, contextualMapper?: TypeMapper): Type {
+        function checkExpression(node: Expression | QualifiedName, checkMode?: CheckMode): Type {
             let type: Type;
             if (node.kind === SyntaxKind.QualifiedName) {
                 type = checkQualifiedName(<QualifiedName>node);
             }
             else {
-                const uninstantiatedType = checkExpressionWorker(<Expression>node, contextualMapper);
-                type = instantiateTypeWithSingleGenericCallSignature(<Expression>node, uninstantiatedType, contextualMapper);
+                const uninstantiatedType = checkExpressionWorker(<Expression>node, checkMode);
+                type = instantiateTypeWithSingleGenericCallSignature(<Expression>node, uninstantiatedType, checkMode);
             }
 
             if (isConstEnumObjectType(type)) {
@@ -13920,7 +17697,7 @@ namespace ts {
             return type;
         }
 
-        function checkExpressionWorker(node: Expression, contextualMapper: TypeMapper): Type {
+        function checkExpressionWorker(node: Expression, checkMode: CheckMode): Type {
             switch (node.kind) {
                 case SyntaxKind.Identifier:
                     return checkIdentifier(<Identifier>node);
@@ -13942,25 +17719,29 @@ namespace ts {
                 case SyntaxKind.RegularExpressionLiteral:
                     return globalRegExpType;
                 case SyntaxKind.ArrayLiteralExpression:
-                    return checkArrayLiteral(<ArrayLiteralExpression>node, contextualMapper);
+                    return checkArrayLiteral(<ArrayLiteralExpression>node, checkMode);
                 case SyntaxKind.ObjectLiteralExpression:
-                    return checkObjectLiteral(<ObjectLiteralExpression>node, contextualMapper);
+                    return checkObjectLiteral(<ObjectLiteralExpression>node, checkMode);
                 case SyntaxKind.PropertyAccessExpression:
                     return checkPropertyAccessExpression(<PropertyAccessExpression>node);
                 case SyntaxKind.ElementAccessExpression:
                     return checkIndexedAccess(<ElementAccessExpression>node);
                 case SyntaxKind.CallExpression:
+                    if ((<CallExpression>node).expression.kind === SyntaxKind.ImportKeyword) {
+                        return checkImportCallExpression(<ImportCall>node);
+                    }
+                    /* falls through */
                 case SyntaxKind.NewExpression:
                     return checkCallExpression(<CallExpression>node);
                 case SyntaxKind.TaggedTemplateExpression:
                     return checkTaggedTemplateExpression(<TaggedTemplateExpression>node);
                 case SyntaxKind.ParenthesizedExpression:
-                    return checkExpression((<ParenthesizedExpression>node).expression, contextualMapper);
+                    return checkExpression((<ParenthesizedExpression>node).expression, checkMode);
                 case SyntaxKind.ClassExpression:
                     return checkClassExpression(<ClassExpression>node);
                 case SyntaxKind.FunctionExpression:
                 case SyntaxKind.ArrowFunction:
-                    return checkFunctionExpressionOrObjectLiteralMethod(<FunctionExpression>node, contextualMapper);
+                    return checkFunctionExpressionOrObjectLiteralMethod(<FunctionExpression>node, checkMode);
                 case SyntaxKind.TypeOfExpression:
                     return checkTypeOfExpression(<TypeOfExpression>node);
                 case SyntaxKind.TypeAssertionExpression:
@@ -13968,6 +17749,8 @@ namespace ts {
                     return checkAssertion(<AssertionExpression>node);
                 case SyntaxKind.NonNullExpression:
                     return checkNonNullAssertion(<NonNullExpression>node);
+                case SyntaxKind.MetaProperty:
+                    return checkMetaProperty(<MetaProperty>node);
                 case SyntaxKind.DeleteExpression:
                     return checkDeleteExpression(<DeleteExpression>node);
                 case SyntaxKind.VoidExpression:
@@ -13979,21 +17762,23 @@ namespace ts {
                 case SyntaxKind.PostfixUnaryExpression:
                     return checkPostfixUnaryExpression(<PostfixUnaryExpression>node);
                 case SyntaxKind.BinaryExpression:
-                    return checkBinaryExpression(<BinaryExpression>node, contextualMapper);
+                    return checkBinaryExpression(<BinaryExpression>node, checkMode);
                 case SyntaxKind.ConditionalExpression:
-                    return checkConditionalExpression(<ConditionalExpression>node, contextualMapper);
-                case SyntaxKind.SpreadElementExpression:
-                    return checkSpreadElementExpression(<SpreadElementExpression>node, contextualMapper);
+                    return checkConditionalExpression(<ConditionalExpression>node, checkMode);
+                case SyntaxKind.SpreadElement:
+                    return checkSpreadExpression(<SpreadElement>node, checkMode);
                 case SyntaxKind.OmittedExpression:
                     return undefinedWideningType;
                 case SyntaxKind.YieldExpression:
                     return checkYieldExpression(<YieldExpression>node);
                 case SyntaxKind.JsxExpression:
-                    return checkJsxExpression(<JsxExpression>node);
+                    return checkJsxExpression(<JsxExpression>node, checkMode);
                 case SyntaxKind.JsxElement:
                     return checkJsxElement(<JsxElement>node);
                 case SyntaxKind.JsxSelfClosingElement:
                     return checkJsxSelfClosingElement(<JsxSelfClosingElement>node);
+                case SyntaxKind.JsxAttributes:
+                    return checkJsxAttributes(<JsxAttributes>node, checkMode);
                 case SyntaxKind.JsxOpeningElement:
                     Debug.fail("Shouldn't ever directly check a JsxOpeningElement");
             }
@@ -14009,7 +17794,16 @@ namespace ts {
             }
 
             checkSourceElement(node.constraint);
-            getConstraintOfTypeParameter(getDeclaredTypeOfTypeParameter(getSymbolOfNode(node)));
+            checkSourceElement(node.default);
+            const typeParameter = getDeclaredTypeOfTypeParameter(getSymbolOfNode(node));
+            if (!hasNonCircularBaseConstraint(typeParameter)) {
+                error(node.constraint, Diagnostics.Type_parameter_0_has_a_circular_constraint, typeToString(typeParameter));
+            }
+            const constraintType = getConstraintOfTypeParameter(typeParameter);
+            const defaultType = getDefaultFromTypeParameter(typeParameter);
+            if (constraintType && defaultType) {
+                checkTypeAssignableTo(defaultType, getTypeWithThisArgument(constraintType, defaultType), node.default, Diagnostics.Type_0_does_not_satisfy_the_constraint_1);
+            }
             if (produceDiagnostics) {
                 checkTypeNameIsReserved(node.name, Diagnostics.Type_parameter_name_cannot_be_0);
             }
@@ -14051,16 +17845,6 @@ namespace ts {
             }
         }
 
-        function isSyntacticallyValidGenerator(node: SignatureDeclaration): boolean {
-            if (!(<FunctionLikeDeclaration>node).asteriskToken || !(<FunctionLikeDeclaration>node).body) {
-                return false;
-            }
-
-            return node.kind === SyntaxKind.MethodDeclaration ||
-                node.kind === SyntaxKind.FunctionDeclaration ||
-                node.kind === SyntaxKind.FunctionExpression;
-        }
-
         function getTypePredicateParameterIndex(parameterList: NodeArray<ParameterDeclaration>, parameter: Identifier): number {
             if (parameterList) {
                 for (let i = 0; i < parameterList.length; i++) {
@@ -14099,7 +17883,7 @@ namespace ts {
                             Diagnostics.A_type_predicate_cannot_reference_a_rest_parameter);
                     }
                     else {
-                        const leadingError = chainDiagnosticMessages(undefined, Diagnostics.A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type);
+                        const leadingError = chainDiagnosticMessages(/*details*/ undefined, Diagnostics.A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type);
                         checkTypeAssignableTo(typePredicate.type,
                             getTypeOfNode(parent.parameters[typePredicate.parameterIndex]),
                             node.type,
@@ -14180,17 +17964,38 @@ namespace ts {
                 checkGrammarFunctionLikeDeclaration(<FunctionLikeDeclaration>node);
             }
 
+            const functionFlags = getFunctionFlags(<FunctionLikeDeclaration>node);
+            if (!(functionFlags & FunctionFlags.Invalid)) {
+                // Async generators prior to ESNext require the __await and __asyncGenerator helpers
+                if ((functionFlags & FunctionFlags.AsyncGenerator) === FunctionFlags.AsyncGenerator && languageVersion < ScriptTarget.ESNext) {
+                    checkExternalEmitHelpers(node, ExternalEmitHelpers.AsyncGeneratorIncludes);
+                }
+
+                // Async functions prior to ES2017 require the __awaiter helper
+                if ((functionFlags & FunctionFlags.AsyncGenerator) === FunctionFlags.Async && languageVersion < ScriptTarget.ES2017) {
+                    checkExternalEmitHelpers(node, ExternalEmitHelpers.Awaiter);
+                }
+
+                // Generator functions, Async functions, and Async Generator functions prior to
+                // ES2015 require the __generator helper
+                if ((functionFlags & FunctionFlags.AsyncGenerator) !== FunctionFlags.Normal && languageVersion < ScriptTarget.ES2015) {
+                    checkExternalEmitHelpers(node, ExternalEmitHelpers.Generator);
+                }
+            }
+
             checkTypeParameters(node.typeParameters);
 
             forEach(node.parameters, checkParameter);
 
+            // TODO(rbuckton): Should we start checking JSDoc types?
             if (node.type) {
                 checkSourceElement(node.type);
             }
 
             if (produceDiagnostics) {
                 checkCollisionWithArgumentsInGeneratedCode(node);
-                if (compilerOptions.noImplicitAny && !node.type) {
+                const returnTypeNode = getEffectiveReturnTypeNode(node);
+                if (noImplicitAny && !returnTypeNode) {
                     switch (node.kind) {
                         case SyntaxKind.ConstructSignature:
                             error(node, Diagnostics.Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type);
@@ -14201,15 +18006,18 @@ namespace ts {
                     }
                 }
 
-                if (node.type) {
-                    if (languageVersion >= ScriptTarget.ES6 && isSyntacticallyValidGenerator(node)) {
-                        const returnType = getTypeFromTypeNode(node.type);
+                if (returnTypeNode) {
+                    const functionFlags = getFunctionFlags(<FunctionDeclaration>node);
+                    if ((functionFlags & (FunctionFlags.Invalid | FunctionFlags.Generator)) === FunctionFlags.Generator) {
+                        const returnType = getTypeFromTypeNode(returnTypeNode);
                         if (returnType === voidType) {
-                            error(node.type, Diagnostics.A_generator_cannot_have_a_void_type_annotation);
+                            error(returnTypeNode, Diagnostics.A_generator_cannot_have_a_void_type_annotation);
                         }
                         else {
-                            const generatorElementType = getElementTypeOfIterableIterator(returnType) || anyType;
-                            const iterableIteratorInstantiation = createIterableIteratorType(generatorElementType);
+                            const generatorElementType = getIteratedTypeOfGenerator(returnType, (functionFlags & FunctionFlags.Async) !== 0) || anyType;
+                            const iterableIteratorInstantiation = functionFlags & FunctionFlags.Async
+                                ? createAsyncIterableIteratorType(generatorElementType) // AsyncGenerator function
+                                : createIterableIteratorType(generatorElementType); // Generator function
 
                             // Naively, one could check that IterableIterator<any> is assignable to the return type annotation.
                             // However, that would not catch the error in the following case.
@@ -14217,10 +18025,10 @@ namespace ts {
                             //    interface BadGenerator extends Iterable<number>, Iterator<string> { }
                             //    function* g(): BadGenerator { } // Iterable and Iterator have different types!
                             //
-                            checkTypeAssignableTo(iterableIteratorInstantiation, returnType, node.type);
+                            checkTypeAssignableTo(iterableIteratorInstantiation, returnType, returnTypeNode);
                         }
                     }
-                    else if (isAsyncFunctionLike(node)) {
+                    else if ((functionFlags & FunctionFlags.AsyncGenerator) === FunctionFlags.Async) {
                         checkAsyncFunctionReturnType(<FunctionLikeDeclaration>node);
                     }
                 }
@@ -14231,57 +18039,99 @@ namespace ts {
         }
 
         function checkClassForDuplicateDeclarations(node: ClassLikeDeclaration) {
-            const enum Accessor {
+            const enum Declaration {
                 Getter = 1,
                 Setter = 2,
+                Method = 4,
                 Property = Getter | Setter
             }
 
-            const instanceNames = createMap<Accessor>();
-            const staticNames = createMap<Accessor>();
+            const instanceNames = createMap<Declaration>();
+            const staticNames = createMap<Declaration>();
             for (const member of node.members) {
                 if (member.kind === SyntaxKind.Constructor) {
                     for (const param of (member as ConstructorDeclaration).parameters) {
                         if (isParameterPropertyDeclaration(param)) {
-                            addName(instanceNames, param.name, (param.name as Identifier).text, Accessor.Property);
+                            addName(instanceNames, param.name, (param.name as Identifier).text, Declaration.Property);
                         }
                     }
                 }
                 else {
-                    const isStatic = forEach(member.modifiers, m => m.kind === SyntaxKind.StaticKeyword);
+                    const isStatic = getModifierFlags(member) & ModifierFlags.Static;
                     const names = isStatic ? staticNames : instanceNames;
 
                     const memberName = member.name && getPropertyNameForPropertyNameNode(member.name);
                     if (memberName) {
                         switch (member.kind) {
                             case SyntaxKind.GetAccessor:
-                                addName(names, member.name, memberName, Accessor.Getter);
+                                addName(names, member.name, memberName, Declaration.Getter);
                                 break;
 
                             case SyntaxKind.SetAccessor:
-                                addName(names, member.name, memberName, Accessor.Setter);
+                                addName(names, member.name, memberName, Declaration.Setter);
                                 break;
 
                             case SyntaxKind.PropertyDeclaration:
-                                addName(names, member.name, memberName, Accessor.Property);
+                                addName(names, member.name, memberName, Declaration.Property);
+                                break;
+
+                            case SyntaxKind.MethodDeclaration:
+                                addName(names, member.name, memberName, Declaration.Method);
                                 break;
                         }
                     }
                 }
             }
 
-            function addName(names: Map<Accessor>, location: Node, name: string, meaning: Accessor) {
-                const prev = names[name];
+            function addName(names: Map<Declaration>, location: Node, name: string, meaning: Declaration) {
+                const prev = names.get(name);
                 if (prev) {
-                    if (prev & meaning) {
+                    if (prev & Declaration.Method) {
+                        if (meaning !== Declaration.Method) {
+                            error(location, Diagnostics.Duplicate_identifier_0, getTextOfNode(location));
+                        }
+                    }
+                    else if (prev & meaning) {
                         error(location, Diagnostics.Duplicate_identifier_0, getTextOfNode(location));
                     }
                     else {
-                        names[name] = prev | meaning;
+                        names.set(name, prev | meaning);
                     }
                 }
                 else {
-                    names[name] = meaning;
+                    names.set(name, meaning);
+                }
+            }
+        }
+
+        /**
+         * Static members being set on a constructor function may conflict with built-in properties
+         * of Function. Esp. in ECMAScript 5 there are non-configurable and non-writable
+         * built-in properties. This check issues a transpile error when a class has a static
+         * member with the same name as a non-writable built-in property.
+         *
+         * @see http://www.ecma-international.org/ecma-262/5.1/#sec-15.3.3
+         * @see http://www.ecma-international.org/ecma-262/5.1/#sec-15.3.5
+         * @see http://www.ecma-international.org/ecma-262/6.0/#sec-properties-of-the-function-constructor
+         * @see http://www.ecma-international.org/ecma-262/6.0/#sec-function-instances
+         */
+        function checkClassForStaticPropertyNameConflicts(node: ClassLikeDeclaration) {
+            for (const member of node.members) {
+                const memberNameNode = member.name;
+                const isStatic = getModifierFlags(member) & ModifierFlags.Static;
+                if (isStatic && memberNameNode) {
+                    const memberName = getPropertyNameForPropertyNameNode(memberNameNode);
+                    switch (memberName) {
+                        case "name":
+                        case "length":
+                        case "caller":
+                        case "arguments":
+                        case "prototype":
+                            const message = Diagnostics.Static_property_0_conflicts_with_built_in_property_Function_0_of_constructor_function_1;
+                            const className = getNameOfSymbol(getSymbolOfNode(node));
+                            error(memberNameNode, message, memberName, className);
+                            break;
+                    }
                 }
             }
         }
@@ -14289,7 +18139,7 @@ namespace ts {
         function checkObjectTypeForDuplicateDeclarations(node: TypeLiteralNode | InterfaceDeclaration) {
             const names = createMap<boolean>();
             for (const member of node.members) {
-                if (member.kind == SyntaxKind.PropertySignature) {
+                if (member.kind === SyntaxKind.PropertySignature) {
                     let memberName: string;
                     switch (member.name.kind) {
                         case SyntaxKind.StringLiteral:
@@ -14301,12 +18151,12 @@ namespace ts {
                             continue;
                     }
 
-                    if (names[memberName]) {
-                        error(member.symbol.valueDeclaration.name, Diagnostics.Duplicate_identifier_0, memberName);
+                    if (names.get(memberName)) {
+                        error(getNameOfDeclaration(member.symbol.valueDeclaration), Diagnostics.Duplicate_identifier_0, memberName);
                         error(member.name, Diagnostics.Duplicate_identifier_0, memberName);
                     }
                     else {
-                        names[memberName] = true;
+                        names.set(memberName, true);
                     }
                 }
             }
@@ -14403,11 +18253,12 @@ namespace ts {
             }
 
             function containsSuperCallAsComputedPropertyName(n: Declaration): boolean {
-                return n.name && containsSuperCall(n.name);
+                const name = getNameOfDeclaration(n);
+                return name && containsSuperCall(name);
             }
 
             function containsSuperCall(n: Node): boolean {
-                if (isSuperCallExpression(n)) {
+                if (isSuperCall(n)) {
                     return true;
                 }
                 else if (isFunctionLike(n)) {
@@ -14463,7 +18314,7 @@ namespace ts {
                         let superCallStatement: ExpressionStatement;
 
                         for (const statement of statements) {
-                            if (statement.kind === SyntaxKind.ExpressionStatement && isSuperCallExpression((<ExpressionStatement>statement).expression)) {
+                            if (statement.kind === SyntaxKind.ExpressionStatement && isSuperCall((<ExpressionStatement>statement).expression)) {
                                 superCallStatement = <ExpressionStatement>statement;
                                 break;
                             }
@@ -14506,7 +18357,7 @@ namespace ts {
                     // TypeScript 1.0 spec (April 2014): 8.4.3
                     // Accessors for the same member name must specify the same accessibility.
                     const otherKind = node.kind === SyntaxKind.GetAccessor ? SyntaxKind.SetAccessor : SyntaxKind.GetAccessor;
-                    const otherAccessor = <AccessorDeclaration>getDeclarationOfKind(node.symbol, otherKind);
+                    const otherAccessor = getDeclarationOfKind<AccessorDeclaration>(node.symbol, otherKind);
                     if (otherAccessor) {
                         if ((getModifierFlags(node) & ModifierFlags.AccessibilityModifier) !== (getModifierFlags(otherAccessor) & ModifierFlags.AccessibilityModifier)) {
                             error(node.name, Diagnostics.Getter_and_setter_accessors_do_not_agree_in_visibility);
@@ -14526,13 +18377,8 @@ namespace ts {
                     checkAllCodePathsInNonVoidFunctionReturnOrThrow(node, returnType);
                 }
             }
-            if (node.parent.kind !== SyntaxKind.ObjectLiteralExpression) {
-                checkSourceElement(node.body);
-                registerForUnusedIdentifiersCheck(node);
-            }
-            else {
-                checkNodeDeferred(node);
-            }
+            checkSourceElement(node.body);
+            registerForUnusedIdentifiersCheck(node);
         }
 
         function checkAccessorDeclarationTypesIdentical(first: AccessorDeclaration, second: AccessorDeclaration, getAnnotatedType: (a: AccessorDeclaration) => Type, message: DiagnosticMessage) {
@@ -14543,16 +18389,12 @@ namespace ts {
             }
         }
 
-        function checkAccessorDeferred(node: AccessorDeclaration) {
-            checkSourceElement(node.body);
-            registerForUnusedIdentifiersCheck(node);
-        }
-
         function checkMissingDeclaration(node: Node) {
             checkDecorators(node);
         }
 
         function checkTypeArgumentConstraints(typeParameters: TypeParameter[], typeArgumentNodes: TypeNode[]): boolean {
+            const minTypeArgumentCount = getMinTypeArgumentCount(typeParameters);
             let typeArguments: Type[];
             let mapper: TypeMapper;
             let result = true;
@@ -14560,7 +18402,7 @@ namespace ts {
                 const constraint = getConstraintOfTypeParameter(typeParameters[i]);
                 if (constraint) {
                     if (!typeArguments) {
-                        typeArguments = map(typeArgumentNodes, getTypeFromTypeNodeNoAlias);
+                        typeArguments = fillMissingTypeArguments(map(typeArgumentNodes, getTypeFromTypeNode), typeParameters, minTypeArgumentCount);
                         mapper = createTypeMapper(typeParameters, typeArguments);
                     }
                     const typeArgument = typeArguments[i];
@@ -14587,7 +18429,7 @@ namespace ts {
                         checkTypeArgumentConstraints(typeParameters, node.typeArguments);
                     }
                 }
-                if (type.flags & TypeFlags.Enum && !(<EnumType>type).memberTypes && getNodeLinks(node).resolvedSymbol.flags & SymbolFlags.EnumMember) {
+                if (type.flags & TypeFlags.Enum && getNodeLinks(node).resolvedSymbol.flags & SymbolFlags.EnumMember) {
                     error(node, Diagnostics.Enum_type_0_has_members_with_initializers_that_are_not_literals, typeToString(type));
                 }
             }
@@ -14625,6 +18467,40 @@ namespace ts {
             forEach(node.types, checkSourceElement);
         }
 
+        function checkIndexedAccessIndexType(type: Type, accessNode: ElementAccessExpression | IndexedAccessTypeNode) {
+            if (!(type.flags & TypeFlags.IndexedAccess)) {
+                return type;
+            }
+            // Check if the index type is assignable to 'keyof T' for the object type.
+            const objectType = (<IndexedAccessType>type).objectType;
+            const indexType = (<IndexedAccessType>type).indexType;
+            if (isTypeAssignableTo(indexType, getIndexType(objectType))) {
+                return type;
+            }
+            // Check if we're indexing with a numeric type and the object type is a generic
+            // type with a constraint that has a numeric index signature.
+            if (maybeTypeOfKind(objectType, TypeFlags.TypeVariable) && isTypeOfKind(indexType, TypeFlags.NumberLike)) {
+                const constraint = getBaseConstraintOfType(objectType);
+                if (constraint && getIndexInfoOfType(constraint, IndexKind.Number)) {
+                    return type;
+                }
+            }
+            error(accessNode, Diagnostics.Type_0_cannot_be_used_to_index_type_1, typeToString(indexType), typeToString(objectType));
+            return type;
+        }
+
+        function checkIndexedAccessType(node: IndexedAccessTypeNode) {
+            checkIndexedAccessIndexType(getTypeFromIndexedAccessTypeNode(node), node);
+        }
+
+        function checkMappedType(node: MappedTypeNode) {
+            checkSourceElement(node.typeParameter);
+            checkSourceElement(node.type);
+            const type = <MappedType>getTypeFromMappedTypeNode(node);
+            const constraintType = getConstraintTypeFromMappedType(type);
+            checkTypeAssignableTo(constraintType, stringType, node.typeParameter.constraint);
+        }
+
         function isPrivateWithinAmbient(node: Node): boolean {
             return (getModifierFlags(node) & ModifierFlags.Private) && isInAmbientContext(node);
         }
@@ -14673,16 +18549,16 @@ namespace ts {
                     forEach(overloads, o => {
                         const deviation = getEffectiveDeclarationFlags(o, flagsToCheck) ^ canonicalFlags;
                         if (deviation & ModifierFlags.Export) {
-                            error(o.name, Diagnostics.Overload_signatures_must_all_be_exported_or_non_exported);
+                            error(getNameOfDeclaration(o), Diagnostics.Overload_signatures_must_all_be_exported_or_non_exported);
                         }
                         else if (deviation & ModifierFlags.Ambient) {
-                            error(o.name, Diagnostics.Overload_signatures_must_all_be_ambient_or_non_ambient);
+                            error(getNameOfDeclaration(o), Diagnostics.Overload_signatures_must_all_be_ambient_or_non_ambient);
                         }
                         else if (deviation & (ModifierFlags.Private | ModifierFlags.Protected)) {
-                            error(o.name || o, Diagnostics.Overload_signatures_must_all_be_public_private_or_protected);
+                            error(getNameOfDeclaration(o) || o, Diagnostics.Overload_signatures_must_all_be_public_private_or_protected);
                         }
                         else if (deviation & ModifierFlags.Abstract) {
-                            error(o.name, Diagnostics.Overload_signatures_must_all_be_abstract_or_non_abstract);
+                            error(getNameOfDeclaration(o), Diagnostics.Overload_signatures_must_all_be_abstract_or_non_abstract);
                         }
                     });
                 }
@@ -14694,7 +18570,7 @@ namespace ts {
                     forEach(overloads, o => {
                         const deviation = hasQuestionToken(o) !== canonicalHasQuestionToken;
                         if (deviation) {
-                            error(o.name, Diagnostics.Overload_signatures_must_all_be_optional_or_required);
+                            error(getNameOfDeclaration(o), Diagnostics.Overload_signatures_must_all_be_optional_or_required);
                         }
                     });
                 }
@@ -14830,7 +18706,7 @@ namespace ts {
 
             if (duplicateFunctionDeclaration) {
                 forEach(declarations, declaration => {
-                    error(declaration.name, Diagnostics.Duplicate_function_implementation);
+                    error(getNameOfDeclaration(declaration), Diagnostics.Duplicate_function_implementation);
                 });
             }
 
@@ -14912,12 +18788,13 @@ namespace ts {
                 for (const d of symbol.declarations) {
                     const declarationSpaces = getDeclarationSpaces(d);
 
+                    const name = getNameOfDeclaration(d);
                     // Only error on the declarations that contributed to the intersecting spaces.
                     if (declarationSpaces & commonDeclarationSpacesForDefaultAndNonDefault) {
-                        error(d.name, Diagnostics.Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead, declarationNameToString(d.name));
+                        error(name, Diagnostics.Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead, declarationNameToString(name));
                     }
                     else if (declarationSpaces & commonDeclarationSpacesForExportsAndLocals) {
-                        error(d.name, Diagnostics.Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local, declarationNameToString(d.name));
+                        error(name, Diagnostics.Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local, declarationNameToString(name));
                     }
                 }
             }
@@ -14944,29 +18821,17 @@ namespace ts {
             }
         }
 
-        function checkNonThenableType(type: Type, location?: Node, message?: DiagnosticMessage) {
-            type = getWidenedType(type);
-            if (!isTypeAny(type) && !isTypeNever(type) && isTypeAssignableTo(type, getGlobalThenableType())) {
-                if (location) {
-                    if (!message) {
-                        message = Diagnostics.Operand_for_await_does_not_have_a_valid_callable_then_member;
-                    }
-
-                    error(location, message);
-                }
-
-                return unknownType;
-            }
-
-            return type;
+        function getAwaitedTypeOfPromise(type: Type, errorNode?: Node, diagnosticMessage?: DiagnosticMessage): Type | undefined {
+            const promisedType = getPromisedTypeOfPromise(type, errorNode);
+            return promisedType && getAwaitedType(promisedType, errorNode, diagnosticMessage);
         }
 
         /**
-          * Gets the "promised type" of a promise.
-          * @param type The type of the promise.
-          * @remarks The "promised type" of a type is the type of the "value" parameter of the "onfulfilled" callback.
-          */
-        function getPromisedType(promise: Type): Type {
+         * Gets the "promised type" of a promise.
+         * @param type The type of the promise.
+         * @remarks The "promised type" of a type is the type of the "value" parameter of the "onfulfilled" callback.
+         */
+        function getPromisedTypeOfPromise(promise: Type, errorNode?: Node): Type {
             //
             //  { // promise
             //      then( // thenFunction
@@ -14981,200 +18846,173 @@ namespace ts {
                 return undefined;
             }
 
-            if (promise.flags & TypeFlags.Reference) {
-                if ((<GenericType>promise).target === tryGetGlobalPromiseType()
-                    || (<GenericType>promise).target === getGlobalPromiseLikeType()) {
-                    return (<GenericType>promise).typeArguments[0];
-                }
+            const typeAsPromise = <PromiseOrAwaitableType>promise;
+            if (typeAsPromise.promisedTypeOfPromise) {
+                return typeAsPromise.promisedTypeOfPromise;
             }
 
-            const globalPromiseLikeType = getInstantiatedGlobalPromiseLikeType();
-            if (globalPromiseLikeType === emptyObjectType || !isTypeAssignableTo(promise, globalPromiseLikeType)) {
-                return undefined;
+            if (isReferenceToType(promise, getGlobalPromiseType(/*reportErrors*/ false))) {
+                return typeAsPromise.promisedTypeOfPromise = (<GenericType>promise).typeArguments[0];
             }
 
             const thenFunction = getTypeOfPropertyOfType(promise, "then");
-            if (!thenFunction || isTypeAny(thenFunction)) {
+            if (isTypeAny(thenFunction)) {
                 return undefined;
             }
 
-            const thenSignatures = getSignaturesOfType(thenFunction, SignatureKind.Call);
+            const thenSignatures = thenFunction ? getSignaturesOfType(thenFunction, SignatureKind.Call) : emptyArray;
             if (thenSignatures.length === 0) {
+                if (errorNode) {
+                    error(errorNode, Diagnostics.A_promise_must_have_a_then_method);
+                }
                 return undefined;
             }
 
-            const onfulfilledParameterType = getTypeWithFacts(getUnionType(map(thenSignatures, getTypeOfFirstParameterOfSignature)), TypeFacts.NEUndefined);
+            const onfulfilledParameterType = getTypeWithFacts(getUnionType(map(thenSignatures, getTypeOfFirstParameterOfSignature)), TypeFacts.NEUndefinedOrNull);
             if (isTypeAny(onfulfilledParameterType)) {
                 return undefined;
             }
 
             const onfulfilledParameterSignatures = getSignaturesOfType(onfulfilledParameterType, SignatureKind.Call);
             if (onfulfilledParameterSignatures.length === 0) {
+                if (errorNode) {
+                    error(errorNode, Diagnostics.The_first_parameter_of_the_then_method_of_a_promise_must_be_a_callback);
+                }
                 return undefined;
             }
 
-            return getUnionType(map(onfulfilledParameterSignatures, getTypeOfFirstParameterOfSignature), /*subtypeReduction*/ true);
-        }
-
-        function getTypeOfFirstParameterOfSignature(signature: Signature) {
-            return signature.parameters.length > 0 ? getTypeAtPosition(signature, 0) : neverType;
+            return typeAsPromise.promisedTypeOfPromise = getUnionType(map(onfulfilledParameterSignatures, getTypeOfFirstParameterOfSignature), /*subtypeReduction*/ true);
         }
 
         /**
-          * Gets the "awaited type" of a type.
-          * @param type The type to await.
-          * @remarks The "awaited type" of an expression is its "promised type" if the expression is a
-          * Promise-like type; otherwise, it is the type of the expression. This is used to reflect
-          * The runtime behavior of the `await` keyword.
-          */
-        function getAwaitedType(type: Type) {
-            return checkAwaitedType(type, /*location*/ undefined, /*message*/ undefined);
+         * Gets the "awaited type" of a type.
+         * @param type The type to await.
+         * @remarks The "awaited type" of an expression is its "promised type" if the expression is a
+         * Promise-like type; otherwise, it is the type of the expression. This is used to reflect
+         * The runtime behavior of the `await` keyword.
+         */
+        function checkAwaitedType(type: Type, errorNode: Node, diagnosticMessage: DiagnosticMessage): Type {
+            return getAwaitedType(type, errorNode, diagnosticMessage) || unknownType;
         }
 
-        function checkAwaitedType(type: Type, location?: Node, message?: DiagnosticMessage) {
-            return checkAwaitedTypeWorker(type);
+        function getAwaitedType(type: Type, errorNode?: Node, diagnosticMessage?: DiagnosticMessage): Type | undefined {
+            const typeAsAwaitable = <PromiseOrAwaitableType>type;
+            if (typeAsAwaitable.awaitedTypeOfType) {
+                return typeAsAwaitable.awaitedTypeOfType;
+            }
 
-            function checkAwaitedTypeWorker(type: Type): Type {
-                if (type.flags & TypeFlags.Union) {
-                    const types: Type[] = [];
-                    for (const constituentType of (<UnionType>type).types) {
-                        types.push(checkAwaitedTypeWorker(constituentType));
-                    }
+            if (isTypeAny(type)) {
+                return typeAsAwaitable.awaitedTypeOfType = type;
+            }
 
-                    return getUnionType(types, /*subtypeReduction*/ true);
+            if (type.flags & TypeFlags.Union) {
+                let types: Type[];
+                for (const constituentType of (<UnionType>type).types) {
+                    types = append(types, getAwaitedType(constituentType, errorNode, diagnosticMessage));
                 }
-                else {
-                    const promisedType = getPromisedType(type);
-                    if (promisedType === undefined) {
-                        // The type was not a PromiseLike, so it could not be unwrapped any further.
-                        // As long as the type does not have a callable "then" property, it is
-                        // safe to return the type; otherwise, an error will have been reported in
-                        // the call to checkNonThenableType and we will return unknownType.
-                        //
-                        // An example of a non-promise "thenable" might be:
-                        //
-                        //  await { then(): void {} }
-                        //
-                        // The "thenable" does not match the minimal definition for a PromiseLike. When
-                        // a Promise/A+-compatible or ES6 promise tries to adopt this value, the promise
-                        // will never settle. We treat this as an error to help flag an early indicator
-                        // of a runtime problem. If the user wants to return this value from an async
-                        // function, they would need to wrap it in some other value. If they want it to
-                        // be treated as a promise, they can cast to <any>.
-                        return checkNonThenableType(type, location, message);
-                    }
-                    else {
-                        if (type.id === promisedType.id || indexOf(awaitedTypeStack, promisedType.id) >= 0) {
-                            // We have a bad actor in the form of a promise whose promised type is
-                            // the same promise type, or a mutually recursive promise. Return the
-                            // unknown type as we cannot guess the shape. If this were the actual
-                            // case in the JavaScript, this Promise would never resolve.
-                            //
-                            // An example of a bad actor with a singly-recursive promise type might
-                            // be:
-                            //
-                            //  interface BadPromise {
-                            //      then(
-                            //          onfulfilled: (value: BadPromise) => any,
-                            //          onrejected: (error: any) => any): BadPromise;
-                            //  }
-                            //
-                            // The above interface will pass the PromiseLike check, and return a
-                            // promised type of `BadPromise`. Since this is a self reference, we
-                            // don't want to keep recursing ad infinitum.
-                            //
-                            // An example of a bad actor in the form of a mutually-recursive
-                            // promise type might be:
-                            //
-                            //  interface BadPromiseA {
-                            //      then(
-                            //          onfulfilled: (value: BadPromiseB) => any,
-                            //          onrejected: (error: any) => any): BadPromiseB;
-                            //  }
-                            //
-                            //  interface BadPromiseB {
-                            //      then(
-                            //          onfulfilled: (value: BadPromiseA) => any,
-                            //          onrejected: (error: any) => any): BadPromiseA;
-                            //  }
-                            //
-                            if (location) {
-                                error(
-                                    location,
-                                    Diagnostics._0_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method,
-                                    symbolToString(type.symbol));
-                            }
 
-                            return unknownType;
-                        }
+                if (!types) {
+                    return undefined;
+                }
+
+                return typeAsAwaitable.awaitedTypeOfType = getUnionType(types, /*subtypeReduction*/ true);
+            }
 
-                        // Keep track of the type we're about to unwrap to avoid bad recursive promise types.
-                        // See the comments above for more information.
-                        awaitedTypeStack.push(type.id);
-                        const awaitedType = checkAwaitedTypeWorker(promisedType);
-                        awaitedTypeStack.pop();
-                        return awaitedType;
+            const promisedType = getPromisedTypeOfPromise(type);
+            if (promisedType) {
+                if (type.id === promisedType.id || indexOf(awaitedTypeStack, promisedType.id) >= 0) {
+                    // Verify that we don't have a bad actor in the form of a promise whose
+                    // promised type is the same as the promise type, or a mutually recursive
+                    // promise. If so, we return undefined as we cannot guess the shape. If this
+                    // were the actual case in the JavaScript, this Promise would never resolve.
+                    //
+                    // An example of a bad actor with a singly-recursive promise type might
+                    // be:
+                    //
+                    //  interface BadPromise {
+                    //      then(
+                    //          onfulfilled: (value: BadPromise) => any,
+                    //          onrejected: (error: any) => any): BadPromise;
+                    //  }
+                    // The above interface will pass the PromiseLike check, and return a
+                    // promised type of `BadPromise`. Since this is a self reference, we
+                    // don't want to keep recursing ad infinitum.
+                    //
+                    // An example of a bad actor in the form of a mutually-recursive
+                    // promise type might be:
+                    //
+                    //  interface BadPromiseA {
+                    //      then(
+                    //          onfulfilled: (value: BadPromiseB) => any,
+                    //          onrejected: (error: any) => any): BadPromiseB;
+                    //  }
+                    //
+                    //  interface BadPromiseB {
+                    //      then(
+                    //          onfulfilled: (value: BadPromiseA) => any,
+                    //          onrejected: (error: any) => any): BadPromiseA;
+                    //  }
+                    //
+                    if (errorNode) {
+                        error(errorNode, Diagnostics.Type_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method);
                     }
+                    return undefined;
                 }
-            }
-        }
 
-        /**
-         * Checks that the return type provided is an instantiation of the global Promise<T> type
-         * and returns the awaited type of the return type.
-         *
-         * @param returnType The return type of a FunctionLikeDeclaration
-         * @param location The node on which to report the error.
-         */
-        function checkCorrectPromiseType(returnType: Type, location: Node, diagnostic: DiagnosticMessage, typeName?: string) {
-            if (returnType === unknownType) {
-                // The return type already had some other error, so we ignore and return
-                // the unknown type.
-                return unknownType;
+                // Keep track of the type we're about to unwrap to avoid bad recursive promise types.
+                // See the comments above for more information.
+                awaitedTypeStack.push(type.id);
+                const awaitedType = getAwaitedType(promisedType, errorNode, diagnosticMessage);
+                awaitedTypeStack.pop();
+
+                if (!awaitedType) {
+                    return undefined;
+                }
+
+                return typeAsAwaitable.awaitedTypeOfType = awaitedType;
             }
 
-            const globalPromiseType = getGlobalPromiseType();
-            if (globalPromiseType === emptyGenericType
-                || globalPromiseType === getTargetType(returnType)) {
-                // Either we couldn't resolve the global promise type, which would have already
-                // reported an error, or we could resolve it and the return type is a valid type
-                // reference to the global type. In either case, we return the awaited type for
-                // the return type.
-                return checkAwaitedType(returnType, location, Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type);
+            // The type was not a promise, so it could not be unwrapped any further.
+            // As long as the type does not have a callable "then" property, it is
+            // safe to return the type; otherwise, an error will be reported in
+            // the call to getNonThenableType and we will return undefined.
+            //
+            // An example of a non-promise "thenable" might be:
+            //
+            //  await { then(): void {} }
+            //
+            // The "thenable" does not match the minimal definition for a promise. When
+            // a Promise/A+-compatible or ES6 promise tries to adopt this value, the promise
+            // will never settle. We treat this as an error to help flag an early indicator
+            // of a runtime problem. If the user wants to return this value from an async
+            // function, they would need to wrap it in some other value. If they want it to
+            // be treated as a promise, they can cast to <any>.
+            const thenFunction = getTypeOfPropertyOfType(type, "then");
+            if (thenFunction && getSignaturesOfType(thenFunction, SignatureKind.Call).length > 0) {
+                if (errorNode) {
+                    Debug.assert(!!diagnosticMessage);
+                    error(errorNode, diagnosticMessage);
+                }
+                return undefined;
             }
 
-            // The promise type was not a valid type reference to the global promise type, so we
-            // report an error and return the unknown type.
-            error(location, diagnostic, typeName);
-            return unknownType;
+            return typeAsAwaitable.awaitedTypeOfType = type;
         }
 
         /**
-          * Checks the return type of an async function to ensure it is a compatible
-          * Promise implementation.
-          * @param node The signature to check
-          * @param returnType The return type for the function
-          * @remarks
-          * This checks that an async function has a valid Promise-compatible return type,
-          * and returns the *awaited type* of the promise. An async function has a valid
-          * Promise-compatible return type if the resolved value of the return type has a
-          * construct signature that takes in an `initializer` function that in turn supplies
-          * a `resolve` function as one of its arguments and results in an object with a
-          * callable `then` signature.
-          */
+         * Checks the return type of an async function to ensure it is a compatible
+         * Promise implementation.
+         *
+         * This checks that an async function has a valid Promise-compatible return type,
+         * and returns the *awaited type* of the promise. An async function has a valid
+         * Promise-compatible return type if the resolved value of the return type has a
+         * construct signature that takes in an `initializer` function that in turn supplies
+         * a `resolve` function as one of its arguments and results in an object with a
+         * callable `then` signature.
+         *
+         * @param node The signature to check
+         */
         function checkAsyncFunctionReturnType(node: FunctionLikeDeclaration): Type {
-            if (languageVersion >= ScriptTarget.ES6) {
-                const returnType = getTypeFromTypeNode(node.type);
-                return checkCorrectPromiseType(returnType, node.type, Diagnostics.The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type);
-            }
-
-            const globalPromiseConstructorLikeType = getGlobalPromiseConstructorLikeType();
-            if (globalPromiseConstructorLikeType === emptyObjectType) {
-                // If we couldn't resolve the global PromiseConstructorLike type we cannot verify
-                // compatibility with __awaiter.
-                return unknownType;
-            }
-
             // As part of our emit for an async function, we will need to emit the entity name of
             // the return type annotation as an expression. To meet the necessary runtime semantics
             // for __awaiter, we must also check that the type of the declaration (e.g. the static
@@ -15199,47 +19037,73 @@ namespace ts {
             //      then<U>(...): Promise<U>;
             //  }
             //
-            // When we get the type of the `Promise` symbol here, we get the type of the static
-            // side of the `Promise` class, which would be `{ new <T>(...): Promise<T> }`.
+            const returnTypeNode = getEffectiveReturnTypeNode(node);
+            const returnType = getTypeFromTypeNode(returnTypeNode);
 
-            const promiseType = getTypeFromTypeNode(node.type);
-            if (promiseType === unknownType && compilerOptions.isolatedModules) {
-                // If we are compiling with isolatedModules, we may not be able to resolve the
-                // type as a value. As such, we will just return unknownType;
-                return unknownType;
+            if (languageVersion >= ScriptTarget.ES2015) {
+                if (returnType === unknownType) {
+                    return unknownType;
+                }
+                const globalPromiseType = getGlobalPromiseType(/*reportErrors*/ true);
+                if (globalPromiseType !== emptyGenericType && !isReferenceToType(returnType, globalPromiseType)) {
+                    // The promise type was not a valid type reference to the global promise type, so we
+                    // report an error and return the unknown type.
+                    error(returnTypeNode, Diagnostics.The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type);
+                    return unknownType;
+                }
             }
+            else {
+                // Always mark the type node as referenced if it points to a value
+                markTypeNodeAsReferenced(returnTypeNode);
 
-            const promiseConstructor = getNodeLinks(node.type).resolvedSymbol;
-            if (!promiseConstructor || !symbolIsValue(promiseConstructor)) {
-                // try to fall back to global promise type.
-                const typeName = promiseConstructor
-                    ? symbolToString(promiseConstructor)
-                    : typeToString(promiseType);
-                return checkCorrectPromiseType(promiseType, node.type, Diagnostics.Type_0_is_not_a_valid_async_function_return_type, typeName);
-            }
+                if (returnType === unknownType) {
+                    return unknownType;
+                }
 
-            // If the Promise constructor, resolved locally, is an alias symbol we should mark it as referenced.
-            checkReturnTypeAnnotationAsExpression(node);
+                const promiseConstructorName = getEntityNameFromTypeNode(returnTypeNode);
+                if (promiseConstructorName === undefined) {
+                    error(returnTypeNode, Diagnostics.Type_0_is_not_a_valid_async_function_return_type_in_ES5_SlashES3_because_it_does_not_refer_to_a_Promise_compatible_constructor_value, typeToString(returnType));
+                    return unknownType;
+                }
 
-            // Validate the promise constructor type.
-            const promiseConstructorType = getTypeOfSymbol(promiseConstructor);
-            if (!checkTypeAssignableTo(promiseConstructorType, globalPromiseConstructorLikeType, node.type, Diagnostics.Type_0_is_not_a_valid_async_function_return_type)) {
-                return unknownType;
-            }
+                const promiseConstructorSymbol = resolveEntityName(promiseConstructorName, SymbolFlags.Value, /*ignoreErrors*/ true);
+                const promiseConstructorType = promiseConstructorSymbol ? getTypeOfSymbol(promiseConstructorSymbol) : unknownType;
+                if (promiseConstructorType === unknownType) {
+                    if (promiseConstructorName.kind === SyntaxKind.Identifier && promiseConstructorName.text === "Promise" && getTargetType(returnType) === getGlobalPromiseType(/*reportErrors*/ false)) {
+                        error(returnTypeNode, Diagnostics.An_async_function_or_method_in_ES5_SlashES3_requires_the_Promise_constructor_Make_sure_you_have_a_declaration_for_the_Promise_constructor_or_include_ES2015_in_your_lib_option);
+                    }
+                    else {
+                        error(returnTypeNode, Diagnostics.Type_0_is_not_a_valid_async_function_return_type_in_ES5_SlashES3_because_it_does_not_refer_to_a_Promise_compatible_constructor_value, entityNameToString(promiseConstructorName));
+                    }
+                    return unknownType;
+                }
 
-            // Verify there is no local declaration that could collide with the promise constructor.
-            const promiseName = getEntityNameFromTypeNode(node.type);
-            const promiseNameOrNamespaceRoot = getFirstIdentifier(promiseName);
-            const rootSymbol = getSymbol(node.locals, promiseNameOrNamespaceRoot.text, SymbolFlags.Value);
-            if (rootSymbol) {
-                error(rootSymbol.valueDeclaration, Diagnostics.Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions,
-                    promiseNameOrNamespaceRoot.text,
-                    getFullyQualifiedName(promiseConstructor));
-                return unknownType;
+                const globalPromiseConstructorLikeType = getGlobalPromiseConstructorLikeType(/*reportErrors*/ true);
+                if (globalPromiseConstructorLikeType === emptyObjectType) {
+                    // If we couldn't resolve the global PromiseConstructorLike type we cannot verify
+                    // compatibility with __awaiter.
+                    error(returnTypeNode, Diagnostics.Type_0_is_not_a_valid_async_function_return_type_in_ES5_SlashES3_because_it_does_not_refer_to_a_Promise_compatible_constructor_value, entityNameToString(promiseConstructorName));
+                    return unknownType;
+                }
+
+                if (!checkTypeAssignableTo(promiseConstructorType, globalPromiseConstructorLikeType, returnTypeNode,
+                    Diagnostics.Type_0_is_not_a_valid_async_function_return_type_in_ES5_SlashES3_because_it_does_not_refer_to_a_Promise_compatible_constructor_value)) {
+                    return unknownType;
+                }
+
+                // Verify there is no local declaration that could collide with the promise constructor.
+                const rootName = promiseConstructorName && getFirstIdentifier(promiseConstructorName);
+                const collidingSymbol = getSymbol(node.locals, rootName.text, SymbolFlags.Value);
+                if (collidingSymbol) {
+                    error(collidingSymbol.valueDeclaration, Diagnostics.Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions,
+                        rootName.text,
+                        entityNameToString(promiseConstructorName));
+                    return unknownType;
+                }
             }
 
             // Get and return the awaited type of the return type.
-            return checkAwaitedType(promiseType, node, Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type);
+            return checkAwaitedType(returnType, node, Diagnostics.The_return_type_of_an_async_function_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member);
         }
 
         /** Check a decorator */
@@ -15292,47 +19156,85 @@ namespace ts {
                 errorInfo);
         }
 
-        /** Checks a type reference node as an expression. */
-        function checkTypeNodeAsExpression(node: TypeNode) {
-            // When we are emitting type metadata for decorators, we need to try to check the type
-            // as if it were an expression so that we can emit the type in a value position when we
-            // serialize the type metadata.
-            if (node && node.kind === SyntaxKind.TypeReference) {
-                const root = getFirstIdentifier((<TypeReferenceNode>node).typeName);
-                const meaning = root.parent.kind === SyntaxKind.TypeReference ? SymbolFlags.Type : SymbolFlags.Namespace;
-                // Resolve type so we know which symbol is referenced
-                const rootSymbol = resolveName(root, root.text, meaning | SymbolFlags.Alias, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined);
-                // Resolved symbol is alias
-                if (rootSymbol && rootSymbol.flags & SymbolFlags.Alias) {
-                    const aliasTarget = resolveAlias(rootSymbol);
-                    // If alias has value symbol - mark alias as referenced
-                    if (aliasTarget.flags & SymbolFlags.Value && !isConstEnumOrConstEnumOnlyModule(resolveAlias(rootSymbol))) {
-                        markAliasSymbolAsReferenced(rootSymbol);
-                    }
-                }
+        /**
+         * If a TypeNode can be resolved to a value symbol imported from an external module, it is
+         * marked as referenced to prevent import elision.
+         */
+        function markTypeNodeAsReferenced(node: TypeNode) {
+            markEntityNameOrEntityExpressionAsReference(node && getEntityNameFromTypeNode(node));
+        }
+
+        function markEntityNameOrEntityExpressionAsReference(typeName: EntityNameOrEntityNameExpression) {
+            const rootName = typeName && getFirstIdentifier(typeName);
+            const rootSymbol = rootName && resolveName(rootName, rootName.text, (typeName.kind === SyntaxKind.Identifier ? SymbolFlags.Type : SymbolFlags.Namespace) | SymbolFlags.Alias, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined);
+            if (rootSymbol
+                && rootSymbol.flags & SymbolFlags.Alias
+                && symbolIsValue(rootSymbol)
+                && !isConstEnumOrConstEnumOnlyModule(resolveAlias(rootSymbol))) {
+                markAliasSymbolAsReferenced(rootSymbol);
             }
         }
 
         /**
-          * Checks the type annotation of an accessor declaration or property declaration as
-          * an expression if it is a type reference to a type with a value declaration.
-          */
-        function checkTypeAnnotationAsExpression(node: VariableLikeDeclaration) {
-            checkTypeNodeAsExpression((<PropertyDeclaration>node).type);
+         * This function marks the type used for metadata decorator as referenced if it is import
+         * from external module.
+         * This is different from markTypeNodeAsReferenced because it tries to simplify type nodes in
+         * union and intersection type
+         * @param node
+         */
+        function markDecoratorMedataDataTypeNodeAsReferenced(node: TypeNode): void {
+            const entityName = getEntityNameForDecoratorMetadata(node);
+            if (entityName && isEntityName(entityName)) {
+                markEntityNameOrEntityExpressionAsReference(entityName);
+            }
         }
 
-        function checkReturnTypeAnnotationAsExpression(node: FunctionLikeDeclaration) {
-            checkTypeNodeAsExpression(node.type);
-        }
+        function getEntityNameForDecoratorMetadata(node: TypeNode): EntityName {
+            if (node) {
+                switch (node.kind) {
+                    case SyntaxKind.IntersectionType:
+                    case SyntaxKind.UnionType:
+                        let commonEntityName: EntityName;
+                        for (const typeNode of (<UnionOrIntersectionTypeNode>node).types) {
+                            const individualEntityName = getEntityNameForDecoratorMetadata(typeNode);
+                            if (!individualEntityName) {
+                                // Individual is something like string number
+                                // So it would be serialized to either that type or object
+                                // Safe to return here
+                                return undefined;
+                            }
 
-        /** Checks the type annotation of the parameters of a function/method or the constructor of a class as expressions */
-        function checkParameterTypeAnnotationsAsExpressions(node: FunctionLikeDeclaration) {
-            // ensure all type annotations with a value declaration are checked as an expression
-            for (const parameter of node.parameters) {
-                checkTypeAnnotationAsExpression(parameter);
+                            if (commonEntityName) {
+                                // Note this is in sync with the transformation that happens for type node.
+                                // Keep this in sync with serializeUnionOrIntersectionType
+                                // Verify if they refer to same entity and is identifier
+                                // return undefined if they dont match because we would emit object
+                                if (!isIdentifier(commonEntityName) ||
+                                    !isIdentifier(individualEntityName) ||
+                                    commonEntityName.text !== individualEntityName.text) {
+                                    return undefined;
+                                }
+                            }
+                            else {
+                                commonEntityName = individualEntityName;
+                            }
+                        }
+                        return commonEntityName;
+
+                    case SyntaxKind.ParenthesizedType:
+                        return getEntityNameForDecoratorMetadata((<ParenthesizedTypeNode>node).type);
+
+                    case SyntaxKind.TypeReference:
+                        return (<TypeReferenceNode>node).typeName;
+                }
             }
         }
 
+        function getParameterTypeNodeForDecoratorCheck(node: ParameterDeclaration): TypeNode {
+            const typeNode = getEffectiveTypeAnnotationNode(node);
+            return isRestParameter(node) ? getRestParameterElementType(typeNode) : typeNode;
+        }
+
         /** Check the decorators of a node */
         function checkDecorators(node: Node): void {
             if (!node.decorators) {
@@ -15349,26 +19251,42 @@ namespace ts {
                 error(node, Diagnostics.Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning);
             }
 
+            const firstDecorator = node.decorators[0];
+            checkExternalEmitHelpers(firstDecorator, ExternalEmitHelpers.Decorate);
+            if (node.kind === SyntaxKind.Parameter) {
+                checkExternalEmitHelpers(firstDecorator, ExternalEmitHelpers.Param);
+            }
+
             if (compilerOptions.emitDecoratorMetadata) {
+                checkExternalEmitHelpers(firstDecorator, ExternalEmitHelpers.Metadata);
+
                 // we only need to perform these checks if we are emitting serialized type metadata for the target of a decorator.
                 switch (node.kind) {
                     case SyntaxKind.ClassDeclaration:
                         const constructor = getFirstConstructorWithBody(<ClassDeclaration>node);
                         if (constructor) {
-                            checkParameterTypeAnnotationsAsExpressions(constructor);
+                            for (const parameter of constructor.parameters) {
+                                markDecoratorMedataDataTypeNodeAsReferenced(getParameterTypeNodeForDecoratorCheck(parameter));
+                            }
                         }
                         break;
 
                     case SyntaxKind.MethodDeclaration:
                     case SyntaxKind.GetAccessor:
                     case SyntaxKind.SetAccessor:
-                        checkParameterTypeAnnotationsAsExpressions(<FunctionLikeDeclaration>node);
-                        checkReturnTypeAnnotationAsExpression(<FunctionLikeDeclaration>node);
+                        for (const parameter of (<FunctionLikeDeclaration>node).parameters) {
+                            markDecoratorMedataDataTypeNodeAsReferenced(getParameterTypeNodeForDecoratorCheck(parameter));
+                        }
+
+                        markDecoratorMedataDataTypeNodeAsReferenced(getEffectiveReturnTypeNode(<FunctionLikeDeclaration>node));
                         break;
 
                     case SyntaxKind.PropertyDeclaration:
+                        markDecoratorMedataDataTypeNodeAsReferenced(getEffectiveTypeAnnotationNode(<ParameterDeclaration>node));
+                        break;
+
                     case SyntaxKind.Parameter:
-                        checkTypeAnnotationAsExpression(<PropertyDeclaration | ParameterDeclaration>node);
+                        markDecoratorMedataDataTypeNodeAsReferenced(getParameterTypeNodeForDecoratorCheck(<ParameterDeclaration>node));
                         break;
                 }
             }
@@ -15378,10 +19296,11 @@ namespace ts {
 
         function checkFunctionDeclaration(node: FunctionDeclaration): void {
             if (produceDiagnostics) {
-                checkFunctionOrMethodDeclaration(node) || checkGrammarForGenerator(node);
-
+                checkFunctionOrMethodDeclaration(node);
+                checkGrammarForGenerator(node);
                 checkCollisionWithCapturedSuperVariable(node, node.name);
                 checkCollisionWithCapturedThisVariable(node, node.name);
+                checkCollisionWithCapturedNewTargetVariable(node, node.name);
                 checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
                 checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
             }
@@ -15390,7 +19309,7 @@ namespace ts {
         function checkFunctionOrMethodDeclaration(node: FunctionDeclaration | MethodDeclaration): void {
             checkDecorators(node);
             checkSignatureDeclaration(node);
-            const isAsync = isAsyncFunctionLike(node);
+            const functionFlags = getFunctionFlags(node);
 
             // Do not use hasDynamicName here, because that returns false for well known symbols.
             // We want to perform checkComputedPropertyName for all computed properties, including
@@ -15432,19 +19351,22 @@ namespace ts {
 
             checkSourceElement(node.body);
 
-            if (!node.asteriskToken) {
-                const returnOrPromisedType = node.type && (isAsync ? checkAsyncFunctionReturnType(node) : getTypeFromTypeNode(node.type));
+            const returnTypeNode = getEffectiveReturnTypeNode(node);
+            if ((functionFlags & FunctionFlags.Generator) === 0) { // Async function or normal function
+                const returnOrPromisedType = returnTypeNode && (functionFlags & FunctionFlags.Async
+                    ? checkAsyncFunctionReturnType(node) // Async function
+                    : getTypeFromTypeNode(returnTypeNode)); // normal function
                 checkAllCodePathsInNonVoidFunctionReturnOrThrow(node, returnOrPromisedType);
             }
 
-            if (produceDiagnostics && !node.type) {
+            if (produceDiagnostics && !returnTypeNode) {
                 // Report an implicit any error if there is no body, no explicit return type, and node is not a private method
                 // in an ambient context
-                if (compilerOptions.noImplicitAny && nodeIsMissing(node.body) && !isPrivateWithinAmbient(node)) {
+                if (noImplicitAny && nodeIsMissing(node.body) && !isPrivateWithinAmbient(node)) {
                     reportImplicitAnyError(node, anyType);
                 }
 
-                if (node.asteriskToken && nodeIsPresent(node.body)) {
+                if (functionFlags & FunctionFlags.Generator && nodeIsPresent(node.body)) {
                     // A generator with a body and no type annotation can still cause errors. It can error if the
                     // yielded values have no common supertype, or it can give an implicit any error if it has no
                     // yielded values. The only way to trigger these errors is to try checking its return type.
@@ -15504,39 +19426,60 @@ namespace ts {
                         case SyntaxKind.ConstructorType:
                             checkUnusedTypeParameters(<FunctionLikeDeclaration>node);
                             break;
-                    };
+                    }
                 }
             }
         }
 
         function checkUnusedLocalsAndParameters(node: Node): void {
             if (node.parent.kind !== SyntaxKind.InterfaceDeclaration && noUnusedIdentifiers && !isInAmbientContext(node)) {
-                for (const key in node.locals) {
-                    const local = node.locals[key];
+                node.locals.forEach(local => {
                     if (!local.isReferenced) {
-                        if (local.valueDeclaration && local.valueDeclaration.kind === SyntaxKind.Parameter) {
-                            const parameter = <ParameterDeclaration>local.valueDeclaration;
+                        if (local.valueDeclaration && getRootDeclaration(local.valueDeclaration).kind === SyntaxKind.Parameter) {
+                            const parameter = <ParameterDeclaration>getRootDeclaration(local.valueDeclaration);
+                            const name = getNameOfDeclaration(local.valueDeclaration);
                             if (compilerOptions.noUnusedParameters &&
                                 !isParameterPropertyDeclaration(parameter) &&
                                 !parameterIsThisKeyword(parameter) &&
-                                !parameterNameStartsWithUnderscore(parameter)) {
-                                error(local.valueDeclaration.name, Diagnostics._0_is_declared_but_never_used, local.name);
+                                !parameterNameStartsWithUnderscore(name)) {
+                                error(name, Diagnostics._0_is_declared_but_never_used, local.name);
                             }
                         }
                         else if (compilerOptions.noUnusedLocals) {
-                            forEach(local.declarations, d => error(d.name || d, Diagnostics._0_is_declared_but_never_used, local.name));
+                            forEach(local.declarations, d => errorUnusedLocal(getNameOfDeclaration(d) || d, local.name));
                         }
                     }
+                });
+            }
+        }
+
+        function isRemovedPropertyFromObjectSpread(node: Node) {
+            if (isBindingElement(node) && isObjectBindingPattern(node.parent)) {
+                const lastElement = lastOrUndefined(node.parent.elements);
+                return lastElement !== node && !!lastElement.dotDotDotToken;
+            }
+            return false;
+        }
+
+        function errorUnusedLocal(node: Node, name: string) {
+            if (isIdentifierThatStartsWithUnderScore(node)) {
+                const declaration = getRootDeclaration(node.parent);
+                if (declaration.kind === SyntaxKind.VariableDeclaration && isForInOrOfStatement(declaration.parent.parent)) {
+                    return;
                 }
             }
+
+            if (!isRemovedPropertyFromObjectSpread(node.kind === SyntaxKind.Identifier ? node.parent : node)) {
+                error(node, Diagnostics._0_is_declared_but_never_used, name);
+            }
         }
 
-        function parameterIsThisKeyword(parameter: ParameterDeclaration) {
-            return parameter.name && (<Identifier>parameter.name).originalKeywordKind === SyntaxKind.ThisKeyword;
+        function parameterNameStartsWithUnderscore(parameterName: DeclarationName) {
+            return parameterName && isIdentifierThatStartsWithUnderScore(parameterName);
         }
 
-        function parameterNameStartsWithUnderscore(parameter: ParameterDeclaration) {
-            return parameter.name && parameter.name.kind === SyntaxKind.Identifier && (<Identifier>parameter.name).text.charCodeAt(0) === CharacterCodes._;
+        function isIdentifierThatStartsWithUnderScore(node: Node) {
+            return node.kind === SyntaxKind.Identifier && (<Identifier>node).text.charCodeAt(0) === CharacterCodes._;
         }
 
         function checkUnusedClassMembers(node: ClassDeclaration | ClassExpression): void {
@@ -15581,16 +19524,15 @@ namespace ts {
 
         function checkUnusedModuleMembers(node: ModuleDeclaration | SourceFile): void {
             if (compilerOptions.noUnusedLocals && !isInAmbientContext(node)) {
-                for (const key in node.locals) {
-                    const local = node.locals[key];
+                node.locals.forEach(local => {
                     if (!local.isReferenced && !local.exportSymbol) {
                         for (const declaration of local.declarations) {
                             if (!isAmbientModule(declaration)) {
-                                error(declaration.name, Diagnostics._0_is_declared_but_never_used, local.name);
+                                errorUnusedLocal(getNameOfDeclaration(declaration), local.name);
                             }
                         }
                     }
-                }
+                });
             }
         }
 
@@ -15653,22 +19595,41 @@ namespace ts {
             }
         }
 
+        function checkCollisionWithCapturedNewTargetVariable(node: Node, name: Identifier): void {
+            if (needCollisionCheckForIdentifier(node, name, "_newTarget")) {
+                potentialNewTargetCollisions.push(node);
+            }
+        }
+
         // this function will run after checking the source file so 'CaptureThis' is correct for all nodes
         function checkIfThisIsCapturedInEnclosingScope(node: Node): void {
-            let current = node;
-            while (current) {
+            findAncestor(node, current => {
                 if (getNodeCheckFlags(current) & NodeCheckFlags.CaptureThis) {
                     const isDeclaration = node.kind !== SyntaxKind.Identifier;
                     if (isDeclaration) {
-                        error((<Declaration>node).name, Diagnostics.Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference);
+                        error(getNameOfDeclaration(<Declaration>node), Diagnostics.Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference);
                     }
                     else {
                         error(node, Diagnostics.Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference);
                     }
-                    return;
+                    return true;
                 }
-                current = current.parent;
-            }
+            });
+        }
+
+        function checkIfNewTargetIsCapturedInEnclosingScope(node: Node): void {
+            findAncestor(node, current => {
+                if (getNodeCheckFlags(current) & NodeCheckFlags.CaptureNewTarget) {
+                    const isDeclaration = node.kind !== SyntaxKind.Identifier;
+                    if (isDeclaration) {
+                        error(getNameOfDeclaration(<Declaration>node), Diagnostics.Duplicate_identifier_newTarget_Compiler_uses_variable_declaration_newTarget_to_capture_new_target_meta_property_reference);
+                    }
+                    else {
+                        error(node, Diagnostics.Expression_resolves_to_variable_declaration_newTarget_that_compiler_uses_to_capture_new_target_meta_property_reference);
+                    }
+                    return true;
+                }
+            });
         }
 
         function checkCollisionWithCapturedSuperVariable(node: Node, name: Identifier) {
@@ -15696,7 +19657,7 @@ namespace ts {
 
         function checkCollisionWithRequireExportsInGeneratedCode(node: Node, name: Identifier) {
             // No need to check for require or exports for ES6 modules and later
-            if (modulekind >= ModuleKind.ES6) {
+            if (modulekind >= ModuleKind.ES2015) {
                 return;
             }
 
@@ -15719,7 +19680,7 @@ namespace ts {
         }
 
         function checkCollisionWithGlobalPromiseInGeneratedCode(node: Node, name: Identifier): void {
-            if (!needCollisionCheckForIdentifier(node, name, "Promise")) {
+            if (languageVersion >= ScriptTarget.ES2017 || !needCollisionCheckForIdentifier(node, name, "Promise")) {
                 return;
             }
 
@@ -15844,26 +19805,28 @@ namespace ts {
                     // so we need to do a bit of extra work to check if reference is legal
                     const enclosingContainer = getEnclosingBlockScopeContainer(symbol.valueDeclaration);
                     if (enclosingContainer === func) {
-                        if (symbol.valueDeclaration.kind === SyntaxKind.Parameter) {
+                        if (symbol.valueDeclaration.kind === SyntaxKind.Parameter ||
+                           symbol.valueDeclaration.kind === SyntaxKind.BindingElement) {
                             // it is ok to reference parameter in initializer if either
                             // - parameter is located strictly on the left of current parameter declaration
                             if (symbol.valueDeclaration.pos < node.pos) {
                                 return;
                             }
                             // - parameter is wrapped in function-like entity
-                            let current = n;
-                            while (current !== node.initializer) {
-                                if (isFunctionLike(current.parent)) {
-                                    return;
-                                }
-                                // computed property names/initializers in instance property declaration of class like entities
-                                // are executed in constructor and thus deferred
-                                if (current.parent.kind === SyntaxKind.PropertyDeclaration &&
-                                    !(hasModifier(current.parent, ModifierFlags.Static)) &&
-                                    isClassLike(current.parent.parent)) {
-                                    return;
-                                }
-                                current = current.parent;
+                            if (findAncestor(
+                                n,
+                                current => {
+                                    if (current === node.initializer) {
+                                        return "quit";
+                                    }
+                                    return isFunctionLike(current.parent) ||
+                                        // computed property names/initializers in instance property declaration of class like entities
+                                        // are executed in constructor and thus deferred
+                                        (current.parent.kind === SyntaxKind.PropertyDeclaration &&
+                                         !(hasModifier(current.parent, ModifierFlags.Static)) &&
+                                         isClassLike(current.parent.parent));
+                                    })) {
+                                return;
                             }
                             // fall through to report error
                         }
@@ -15876,6 +19839,10 @@ namespace ts {
             }
         }
 
+        function convertAutoToAny(type: Type) {
+            return type === autoType ? anyType : type === autoArrayType ? anyArrayType : type;
+        }
+
         // Check variable, parameter, or property declaration
         function checkVariableLikeDeclaration(node: VariableLikeDeclaration) {
             checkDecorators(node);
@@ -15892,6 +19859,9 @@ namespace ts {
             }
 
             if (node.kind === SyntaxKind.BindingElement) {
+                if (node.parent.kind === SyntaxKind.ObjectBindingPattern && languageVersion < ScriptTarget.ESNext) {
+                    checkExternalEmitHelpers(node, ExternalEmitHelpers.Rest);
+                }
                 // check computed properties inside property names of binding elements
                 if (node.propertyName && node.propertyName.kind === SyntaxKind.ComputedPropertyName) {
                     checkComputedPropertyName(<ComputedPropertyName>node.propertyName);
@@ -15902,13 +19872,18 @@ namespace ts {
                 const parentType = getTypeForBindingElementParent(parent);
                 const name = node.propertyName || <Identifier>node.name;
                 const property = getPropertyOfType(parentType, getTextOfPropertyName(name));
-                if (parent.initializer && property && getParentOfSymbol(property)) {
-                    checkClassPropertyAccess(parent, parent.initializer, parentType, property);
+                markPropertyAsReferenced(property);
+                if (parent.initializer && property) {
+                    checkPropertyAccessibility(parent, parent.initializer, parentType, property);
                 }
             }
 
             // For a binding pattern, check contained binding elements
             if (isBindingPattern(node.name)) {
+                if (node.name.kind === SyntaxKind.ArrayBindingPattern && languageVersion < ScriptTarget.ES2015 && compilerOptions.downlevelIteration) {
+                    checkExternalEmitHelpers(node, ExternalEmitHelpers.Read);
+                }
+
                 forEach((<BindingPattern>node.name).elements, checkSourceElement);
             }
             // For a parameter declaration with an initializer, error and exit if the containing function doesn't have a body
@@ -15926,7 +19901,7 @@ namespace ts {
                 return;
             }
             const symbol = getSymbolOfNode(node);
-            const type = getTypeOfVariableOrParameterOrProperty(symbol);
+            const type = convertAutoToAny(getTypeOfVariableOrParameterOrProperty(symbol));
             if (node === symbol.valueDeclaration) {
                 // Node is the primary declaration of the symbol, just validate the initializer
                 // Don't validate for-in initializer as it is already an error
@@ -15938,7 +19913,7 @@ namespace ts {
             else {
                 // Node is a secondary declaration, check that type is identical to primary declaration and check that
                 // initializer is consistent with type associated with the node
-                const declarationType = getWidenedTypeForVariableLikeDeclaration(node);
+                const declarationType = convertAutoToAny(getWidenedTypeForVariableLikeDeclaration(node));
                 if (type !== unknownType && declarationType !== unknownType && !isTypeIdenticalTo(type, declarationType)) {
                     error(node.name, Diagnostics.Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_type_2, declarationNameToString(node.name), typeToString(type), typeToString(declarationType));
                 }
@@ -15946,7 +19921,7 @@ namespace ts {
                     checkTypeAssignableTo(checkExpressionCached(node.initializer), declarationType, node, /*headMessage*/ undefined);
                 }
                 if (!areDeclarationFlagsIdentical(node, symbol.valueDeclaration)) {
-                    error(symbol.valueDeclaration.name, Diagnostics.All_declarations_of_0_must_have_identical_modifiers, declarationNameToString(node.name));
+                    error(getNameOfDeclaration(symbol.valueDeclaration), Diagnostics.All_declarations_of_0_must_have_identical_modifiers, declarationNameToString(node.name));
                     error(node.name, Diagnostics.All_declarations_of_0_must_have_identical_modifiers, declarationNameToString(node.name));
                 }
             }
@@ -15958,6 +19933,7 @@ namespace ts {
                 }
                 checkCollisionWithCapturedSuperVariable(node, <Identifier>node.name);
                 checkCollisionWithCapturedThisVariable(node, <Identifier>node.name);
+                checkCollisionWithCapturedNewTargetVariable(node, <Identifier>node.name);
                 checkCollisionWithRequireExportsInGeneratedCode(node, <Identifier>node.name);
                 checkCollisionWithGlobalPromiseInGeneratedCode(node, <Identifier>node.name);
             }
@@ -16001,10 +19977,10 @@ namespace ts {
             forEach(node.declarationList.declarations, checkSourceElement);
         }
 
-        function checkGrammarDisallowedModifiersOnObjectLiteralExpressionMethod(node: Node) {
+        function checkGrammarDisallowedModifiersOnObjectLiteralExpressionMethod(node: MethodDeclaration) {
             // We only disallow modifier on a method declaration if it is a property of object-literal-expression
             if (node.modifiers && node.parent.kind === SyntaxKind.ObjectLiteralExpression) {
-                if (isAsyncFunctionLike(node)) {
+                if (getFunctionFlags(node) & FunctionFlags.Async) {
                     if (node.modifiers.length > 1) {
                         return grammarErrorOnFirstToken(node, Diagnostics.Modifiers_cannot_appear_here);
                     }
@@ -16080,6 +20056,20 @@ namespace ts {
         function checkForOfStatement(node: ForOfStatement): void {
             checkGrammarForInOrForOfStatement(node);
 
+            if (node.kind === SyntaxKind.ForOfStatement) {
+                if ((<ForOfStatement>node).awaitModifier) {
+                    const functionFlags = getFunctionFlags(getContainingFunction(node));
+                    if ((functionFlags & (FunctionFlags.Invalid | FunctionFlags.Async)) === FunctionFlags.Async && languageVersion < ScriptTarget.ESNext) {
+                        // for..await..of in an async function or async generator function prior to ESNext requires the __asyncValues helper
+                        checkExternalEmitHelpers(node, ExternalEmitHelpers.ForAwaitOfIncludes);
+                    }
+                }
+                else if (compilerOptions.downlevelIteration && languageVersion < ScriptTarget.ES2015) {
+                    // for..of prior to ES2015 requires the __values helper when downlevelIteration is enabled
+                    checkExternalEmitHelpers(node, ExternalEmitHelpers.ForOfIncludes);
+                }
+            }
+
             // Check the LHS and RHS
             // If the LHS is a declaration, just check it as a variable declaration, which will in turn check the RHS
             // via checkRightHandSideOfForOf.
@@ -16090,7 +20080,7 @@ namespace ts {
             }
             else {
                 const varExpr = <Expression>node.initializer;
-                const iteratedType = checkRightHandSideOfForOf(node.expression);
+                const iteratedType = checkRightHandSideOfForOf(node.expression, node.awaitModifier);
 
                 // There may be a destructuring assignment on the left side
                 if (varExpr.kind === SyntaxKind.ArrayLiteralExpression || varExpr.kind === SyntaxKind.ObjectLiteralExpression) {
@@ -16101,8 +20091,7 @@ namespace ts {
                 }
                 else {
                     const leftType = checkExpression(varExpr);
-                    checkReferenceExpression(varExpr, /*invalidReferenceMessage*/ Diagnostics.Invalid_left_hand_side_in_for_of_statement,
-                        /*constantVariableMessage*/ Diagnostics.The_left_hand_side_of_a_for_of_statement_cannot_be_a_constant_or_a_read_only_property);
+                    checkReferenceExpression(varExpr, Diagnostics.The_left_hand_side_of_a_for_of_statement_must_be_a_variable_or_a_property_access);
 
                     // iteratedType will be undefined if the rightType was missing properties/signatures
                     // required to get its iteratedType (like [Symbol.iterator] or next). This may be
@@ -16124,6 +20113,7 @@ namespace ts {
             // Grammar checking
             checkGrammarForInOrForOfStatement(node);
 
+            const rightType = checkNonNullExpression(node.expression);
             // TypeScript 1.0 spec  (April 2014): 5.4
             // In a 'for-in' statement of the form
             // for (let VarDecl in Expr) Statement
@@ -16134,7 +20124,6 @@ namespace ts {
                 if (variable && isBindingPattern(variable.name)) {
                     error(variable.name, Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern);
                 }
-
                 checkForInOrForOfVariableDeclaration(node);
             }
             else {
@@ -16147,20 +20136,18 @@ namespace ts {
                 if (varExpr.kind === SyntaxKind.ArrayLiteralExpression || varExpr.kind === SyntaxKind.ObjectLiteralExpression) {
                     error(varExpr, Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern);
                 }
-                else if (!isTypeAnyOrAllConstituentTypesHaveKind(leftType, TypeFlags.StringLike)) {
+                else if (!isTypeAssignableTo(getIndexTypeOrString(rightType), leftType)) {
                     error(varExpr, Diagnostics.The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any);
                 }
                 else {
                     // run check only former check succeeded to avoid cascading errors
-                    checkReferenceExpression(varExpr, Diagnostics.Invalid_left_hand_side_in_for_in_statement,
-                        Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_be_a_constant_or_a_read_only_property);
+                    checkReferenceExpression(varExpr, Diagnostics.The_left_hand_side_of_a_for_in_statement_must_be_a_variable_or_a_property_access);
                 }
             }
 
-            const rightType = checkNonNullExpression(node.expression);
             // unknownType is returned i.e. if node.expression is identifier whose name cannot be resolved
             // in this case error about missing name is already reported - do not report extra one
-            if (!isTypeAnyOrAllConstituentTypesHaveKind(rightType, TypeFlags.ObjectType | TypeFlags.TypeParameter)) {
+            if (!isTypeAnyOrAllConstituentTypesHaveKind(rightType, TypeFlags.Object | TypeFlags.TypeVariable | TypeFlags.NonPrimitive)) {
                 error(node.expression, Diagnostics.The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter);
             }
 
@@ -16170,7 +20157,7 @@ namespace ts {
             }
         }
 
-        function checkForInOrForOfVariableDeclaration(iterationStatement: ForInStatement | ForOfStatement): void {
+        function checkForInOrForOfVariableDeclaration(iterationStatement: ForInOrOfStatement): void {
             const variableDeclarationList = <VariableDeclarationList>iterationStatement.initializer;
             // checkGrammarForInOrForOfStatement will check that there is exactly one declaration.
             if (variableDeclarationList.declarations.length >= 1) {
@@ -16179,56 +20166,126 @@ namespace ts {
             }
         }
 
-        function checkRightHandSideOfForOf(rhsExpression: Expression): Type {
+        function checkRightHandSideOfForOf(rhsExpression: Expression, awaitModifier: AwaitKeywordToken | undefined): Type {
             const expressionType = checkNonNullExpression(rhsExpression);
-            return checkIteratedTypeOrElementType(expressionType, rhsExpression, /*allowStringInput*/ true);
+            return checkIteratedTypeOrElementType(expressionType, rhsExpression, /*allowStringInput*/ true, awaitModifier !== undefined);
         }
 
-        function checkIteratedTypeOrElementType(inputType: Type, errorNode: Node, allowStringInput: boolean): Type {
+        function checkIteratedTypeOrElementType(inputType: Type, errorNode: Node, allowStringInput: boolean, allowAsyncIterables: boolean): Type {
             if (isTypeAny(inputType)) {
                 return inputType;
             }
-            if (languageVersion >= ScriptTarget.ES6) {
-                return checkElementTypeOfIterable(inputType, errorNode);
+
+            return getIteratedTypeOrElementType(inputType, errorNode, allowStringInput, allowAsyncIterables, /*checkAssignability*/ true) || anyType;
+        }
+
+        /**
+         * When consuming an iterable type in a for..of, spread, or iterator destructuring assignment
+         * we want to get the iterated type of an iterable for ES2015 or later, or the iterated type
+         * of a iterable (if defined globally) or element type of an array like for ES2015 or earlier.
+         */
+        function getIteratedTypeOrElementType(inputType: Type, errorNode: Node, allowStringInput: boolean, allowAsyncIterables: boolean, checkAssignability: boolean): Type {
+            const uplevelIteration = languageVersion >= ScriptTarget.ES2015;
+            const downlevelIteration = !uplevelIteration && compilerOptions.downlevelIteration;
+
+            // Get the iterated type of an `Iterable<T>` or `IterableIterator<T>` only in ES2015
+            // or higher, when inside of an async generator or for-await-if, or when
+            // downlevelIteration is requested.
+            if (uplevelIteration || downlevelIteration || allowAsyncIterables) {
+                // We only report errors for an invalid iterable type in ES2015 or higher.
+                const iteratedType = getIteratedTypeOfIterable(inputType, uplevelIteration ? errorNode : undefined, allowAsyncIterables, /*allowSyncIterables*/ true, checkAssignability);
+                if (iteratedType || uplevelIteration) {
+                    return iteratedType;
+                }
             }
+
+            let arrayType = inputType;
+            let reportedError = false;
+            let hasStringConstituent = false;
+
+            // If strings are permitted, remove any string-like constituents from the array type.
+            // This allows us to find other non-string element types from an array unioned with
+            // a string.
             if (allowStringInput) {
-                return checkElementTypeOfArrayOrString(inputType, errorNode);
-            }
-            if (isArrayLikeType(inputType)) {
-                const indexType = getIndexTypeOfType(inputType, IndexKind.Number);
-                if (indexType) {
-                    return indexType;
+                if (arrayType.flags & TypeFlags.Union) {
+                    // After we remove all types that are StringLike, we will know if there was a string constituent
+                    // based on whether the result of filter is a new array.
+                    const arrayTypes = (<UnionType>inputType).types;
+                    const filteredTypes = filter(arrayTypes, t => !(t.flags & TypeFlags.StringLike));
+                    if (filteredTypes !== arrayTypes) {
+                        arrayType = getUnionType(filteredTypes, /*subtypeReduction*/ true);
+                    }
+                }
+                else if (arrayType.flags & TypeFlags.StringLike) {
+                    arrayType = neverType;
+                }
+
+                hasStringConstituent = arrayType !== inputType;
+                if (hasStringConstituent) {
+                    if (languageVersion < ScriptTarget.ES5) {
+                        if (errorNode) {
+                            error(errorNode, Diagnostics.Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher);
+                            reportedError = true;
+                        }
+                    }
+
+                    // Now that we've removed all the StringLike types, if no constituents remain, then the entire
+                    // arrayOrStringType was a string.
+                    if (arrayType.flags & TypeFlags.Never) {
+                        return stringType;
+                    }
                 }
             }
-            if (errorNode) {
-                error(errorNode, Diagnostics.Type_0_is_not_an_array_type, typeToString(inputType));
+
+            if (!isArrayLikeType(arrayType)) {
+                if (errorNode && !reportedError) {
+                    // Which error we report depends on whether we allow strings or if there was a
+                    // string constituent. For example, if the input type is number | string, we
+                    // want to say that number is not an array type. But if the input was just
+                    // number and string input is allowed, we want to say that number is not an
+                    // array type or a string type.
+                    const diagnostic = !allowStringInput || hasStringConstituent
+                        ? downlevelIteration
+                            ? Diagnostics.Type_0_is_not_an_array_type_or_does_not_have_a_Symbol_iterator_method_that_returns_an_iterator
+                            : Diagnostics.Type_0_is_not_an_array_type
+                        : downlevelIteration
+                            ? Diagnostics.Type_0_is_not_an_array_type_or_a_string_type_or_does_not_have_a_Symbol_iterator_method_that_returns_an_iterator
+                            : Diagnostics.Type_0_is_not_an_array_type_or_a_string_type;
+                    error(errorNode, diagnostic, typeToString(arrayType));
+                }
+                return hasStringConstituent ? stringType : undefined;
             }
-            return unknownType;
-        }
 
-        /**
-         * When errorNode is undefined, it means we should not report any errors.
-         */
-        function checkElementTypeOfIterable(iterable: Type, errorNode: Node): Type {
-            const elementType = getElementTypeOfIterable(iterable, errorNode);
-            // Now even though we have extracted the iteratedType, we will have to validate that the type
-            // passed in is actually an Iterable.
-            if (errorNode && elementType) {
-                checkTypeAssignableTo(iterable, createIterableType(elementType), errorNode);
+            const arrayElementType = getIndexTypeOfType(arrayType, IndexKind.Number);
+            if (hasStringConstituent && arrayElementType) {
+                // This is just an optimization for the case where arrayOrStringType is string | string[]
+                if (arrayElementType.flags & TypeFlags.StringLike) {
+                    return stringType;
+                }
+
+                return getUnionType([arrayElementType, stringType], /*subtypeReduction*/ true);
             }
 
-            return elementType || anyType;
+            return arrayElementType;
         }
 
         /**
          * We want to treat type as an iterable, and get the type it is an iterable of. The iterable
          * must have the following structure (annotated with the names of the variables below):
          *
-         * { // iterable
-         *     [Symbol.iterator]: { // iteratorFunction
-         *         (): Iterator<T>
+         *     { // iterable
+         *         [Symbol.iterator]: { // iteratorMethod
+         *             (): Iterator<T>
+         *         }
+         *     }
+         *
+         * For an async iterable, we expect the following structure:
+         *
+         *     { // iterable
+         *         [Symbol.asyncIterator]: { // iteratorMethod
+         *             (): AsyncIterator<T>
+         *         }
          *     }
-         * }
          *
          * T is the type we are after. At every level that involves analyzing return types
          * of signatures, we union the return types of all the signatures.
@@ -16240,183 +20297,186 @@ namespace ts {
          * caller requested it. Then the caller can decide what to do in the case where there is no iterated
          * type. This is different from returning anyType, because that would signify that we have matched the
          * whole pattern and that T (above) is 'any'.
+         *
+         * For a **for-of** statement, `yield*` (in a normal generator), spread, array
+         * destructuring, or normal generator we will only ever look for a `[Symbol.iterator]()`
+         * method.
+         *
+         * For an async generator we will only ever look at the `[Symbol.asyncIterator]()` method.
+         *
+         * For a **for-await-of** statement or a `yield*` in an async generator we will look for
+         * the `[Symbol.asyncIterator]()` method first, and then the `[Symbol.iterator]()` method.
          */
-        function getElementTypeOfIterable(type: Type, errorNode: Node): Type {
+        function getIteratedTypeOfIterable(type: Type, errorNode: Node | undefined, allowAsyncIterables: boolean, allowSyncIterables: boolean, checkAssignability: boolean): Type | undefined {
             if (isTypeAny(type)) {
                 return undefined;
             }
 
-            const typeAsIterable = <IterableOrIteratorType>type;
-            if (!typeAsIterable.iterableElementType) {
-                // As an optimization, if the type is instantiated directly using the globalIterableType (Iterable<number>),
-                // then just grab its type argument.
-                if ((type.flags & TypeFlags.Reference) && (<GenericType>type).target === getGlobalIterableType()) {
-                    typeAsIterable.iterableElementType = (<GenericType>type).typeArguments[0];
+            return mapType(type, getIteratedType);
+
+            function getIteratedType(type: Type) {
+                const typeAsIterable = <IterableOrIteratorType>type;
+                if (allowAsyncIterables) {
+                    if (typeAsIterable.iteratedTypeOfAsyncIterable) {
+                        return typeAsIterable.iteratedTypeOfAsyncIterable;
+                    }
+
+                    // As an optimization, if the type is an instantiation of the global `AsyncIterable<T>`
+                    // or the global `AsyncIterableIterator<T>` then just grab its type argument.
+                    if (isReferenceToType(type, getGlobalAsyncIterableType(/*reportErrors*/ false)) ||
+                        isReferenceToType(type, getGlobalAsyncIterableIteratorType(/*reportErrors*/ false))) {
+                        return typeAsIterable.iteratedTypeOfAsyncIterable = (<GenericType>type).typeArguments[0];
+                    }
                 }
-                else {
-                    const iteratorFunction = getTypeOfPropertyOfType(type, getPropertyNameForKnownSymbolName("iterator"));
-                    if (isTypeAny(iteratorFunction)) {
-                        return undefined;
+
+                if (allowSyncIterables) {
+                    if (typeAsIterable.iteratedTypeOfIterable) {
+                        return typeAsIterable.iteratedTypeOfIterable;
                     }
 
-                    const iteratorFunctionSignatures = iteratorFunction ? getSignaturesOfType(iteratorFunction, SignatureKind.Call) : emptyArray;
-                    if (iteratorFunctionSignatures.length === 0) {
-                        if (errorNode) {
-                            error(errorNode, Diagnostics.Type_must_have_a_Symbol_iterator_method_that_returns_an_iterator);
-                        }
-                        return undefined;
+                    // As an optimization, if the type is an instantiation of the global `Iterable<T>` or
+                    // `IterableIterator<T>` then just grab its type argument.
+                    if (isReferenceToType(type, getGlobalIterableType(/*reportErrors*/ false)) ||
+                        isReferenceToType(type, getGlobalIterableIteratorType(/*reportErrors*/ false))) {
+                        return typeAsIterable.iteratedTypeOfIterable = (<GenericType>type).typeArguments[0];
                     }
+                }
 
-                    typeAsIterable.iterableElementType = getElementTypeOfIterator(getUnionType(map(iteratorFunctionSignatures, getReturnTypeOfSignature), /*subtypeReduction*/ true), errorNode);
+                const asyncMethodType = allowAsyncIterables && getTypeOfPropertyOfType(type, getPropertyNameForKnownSymbolName("asyncIterator"));
+                const methodType = asyncMethodType || (allowSyncIterables && getTypeOfPropertyOfType(type, getPropertyNameForKnownSymbolName("iterator")));
+                if (isTypeAny(methodType)) {
+                    return undefined;
+                }
+
+                const signatures = methodType && getSignaturesOfType(methodType, SignatureKind.Call);
+                if (!some(signatures)) {
+                    if (errorNode) {
+                        error(errorNode,
+                            allowAsyncIterables
+                                ? Diagnostics.Type_must_have_a_Symbol_asyncIterator_method_that_returns_an_async_iterator
+                                : Diagnostics.Type_must_have_a_Symbol_iterator_method_that_returns_an_iterator);
+                        // only report on the first error
+                        errorNode = undefined;
+                    }
+                    return undefined;
                 }
-            }
 
-            return typeAsIterable.iterableElementType;
+                const returnType = getUnionType(map(signatures, getReturnTypeOfSignature), /*subtypeReduction*/ true);
+                const iteratedType = getIteratedTypeOfIterator(returnType, errorNode, /*isAsyncIterator*/ !!asyncMethodType);
+                if (checkAssignability && errorNode && iteratedType) {
+                    // If `checkAssignability` was specified, we were called from
+                    // `checkIteratedTypeOrElementType`. As such, we need to validate that
+                    // the type passed in is actually an Iterable.
+                    checkTypeAssignableTo(type, asyncMethodType
+                        ? createAsyncIterableType(iteratedType)
+                        : createIterableType(iteratedType), errorNode);
+                }
+
+                return asyncMethodType
+                    ? typeAsIterable.iteratedTypeOfAsyncIterable = iteratedType
+                    : typeAsIterable.iteratedTypeOfIterable = iteratedType;
+            }
         }
 
         /**
-         * This function has very similar logic as getElementTypeOfIterable, except that it operates on
+         * This function has very similar logic as getIteratedTypeOfIterable, except that it operates on
          * Iterators instead of Iterables. Here is the structure:
          *
          *  { // iterator
-         *      next: { // iteratorNextFunction
-         *          (): { // iteratorNextResult
-         *              value: T // iteratorNextValue
+         *      next: { // nextMethod
+         *          (): { // nextResult
+         *              value: T // nextValue
          *          }
          *      }
          *  }
          *
+         * For an async iterator, we expect the following structure:
+         *
+         *  { // iterator
+         *      next: { // nextMethod
+         *          (): PromiseLike<{ // nextResult
+         *              value: T // nextValue
+         *          }>
+         *      }
+         *  }
          */
-        function getElementTypeOfIterator(type: Type, errorNode: Node): Type {
+        function getIteratedTypeOfIterator(type: Type, errorNode: Node | undefined, isAsyncIterator: boolean): Type | undefined {
             if (isTypeAny(type)) {
                 return undefined;
             }
 
             const typeAsIterator = <IterableOrIteratorType>type;
-            if (!typeAsIterator.iteratorElementType) {
-                // As an optimization, if the type is instantiated directly using the globalIteratorType (Iterator<number>),
-                // then just grab its type argument.
-                if ((type.flags & TypeFlags.Reference) && (<GenericType>type).target === getGlobalIteratorType()) {
-                    typeAsIterator.iteratorElementType = (<GenericType>type).typeArguments[0];
-                }
-                else {
-                    const iteratorNextFunction = getTypeOfPropertyOfType(type, "next");
-                    if (isTypeAny(iteratorNextFunction)) {
-                        return undefined;
-                    }
-
-                    const iteratorNextFunctionSignatures = iteratorNextFunction ? getSignaturesOfType(iteratorNextFunction, SignatureKind.Call) : emptyArray;
-                    if (iteratorNextFunctionSignatures.length === 0) {
-                        if (errorNode) {
-                            error(errorNode, Diagnostics.An_iterator_must_have_a_next_method);
-                        }
-                        return undefined;
-                    }
-
-                    const iteratorNextResult = getUnionType(map(iteratorNextFunctionSignatures, getReturnTypeOfSignature), /*subtypeReduction*/ true);
-                    if (isTypeAny(iteratorNextResult)) {
-                        return undefined;
-                    }
-
-                    const iteratorNextValue = getTypeOfPropertyOfType(iteratorNextResult, "value");
-                    if (!iteratorNextValue) {
-                        if (errorNode) {
-                            error(errorNode, Diagnostics.The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property);
-                        }
-                        return undefined;
-                    }
-
-                    typeAsIterator.iteratorElementType = iteratorNextValue;
-                }
+            if (isAsyncIterator ? typeAsIterator.iteratedTypeOfAsyncIterator : typeAsIterator.iteratedTypeOfIterator) {
+                return isAsyncIterator ? typeAsIterator.iteratedTypeOfAsyncIterator : typeAsIterator.iteratedTypeOfIterator;
             }
 
-            return typeAsIterator.iteratorElementType;
-        }
+            // As an optimization, if the type is an instantiation of the global `Iterator<T>` (for
+            // a non-async iterator) or the global `AsyncIterator<T>` (for an async-iterator) then
+            // just grab its type argument.
+            const getIteratorType = isAsyncIterator ? getGlobalAsyncIteratorType : getGlobalIteratorType;
+            if (isReferenceToType(type, getIteratorType(/*reportErrors*/ false))) {
+                return isAsyncIterator
+                    ? typeAsIterator.iteratedTypeOfAsyncIterator = (<GenericType>type).typeArguments[0]
+                    : typeAsIterator.iteratedTypeOfIterator = (<GenericType>type).typeArguments[0];
+            }
 
-        function getElementTypeOfIterableIterator(type: Type): Type {
-            if (isTypeAny(type)) {
+            // Both async and non-async iterators must have a `next` method.
+            const nextMethod = getTypeOfPropertyOfType(type, "next");
+            if (isTypeAny(nextMethod)) {
                 return undefined;
             }
 
-            // As an optimization, if the type is instantiated directly using the globalIterableIteratorType (IterableIterator<number>),
-            // then just grab its type argument.
-            if ((type.flags & TypeFlags.Reference) && (<GenericType>type).target === getGlobalIterableIteratorType()) {
-                return (<GenericType>type).typeArguments[0];
+            const nextMethodSignatures = nextMethod ? getSignaturesOfType(nextMethod, SignatureKind.Call) : emptyArray;
+            if (nextMethodSignatures.length === 0) {
+                if (errorNode) {
+                    error(errorNode, isAsyncIterator
+                        ? Diagnostics.An_async_iterator_must_have_a_next_method
+                        : Diagnostics.An_iterator_must_have_a_next_method);
+                }
+                return undefined;
             }
 
-            return getElementTypeOfIterable(type, /*errorNode*/ undefined) ||
-                getElementTypeOfIterator(type, /*errorNode*/ undefined);
-        }
-
-        /**
-         * This function does the following steps:
-         *   1. Break up arrayOrStringType (possibly a union) into its string constituents and array constituents.
-         *   2. Take the element types of the array constituents.
-         *   3. Return the union of the element types, and string if there was a string constituent.
-         *
-         * For example:
-         *     string -> string
-         *     number[] -> number
-         *     string[] | number[] -> string | number
-         *     string | number[] -> string | number
-         *     string | string[] | number[] -> string | number
-         *
-         * It also errors if:
-         *   1. Some constituent is neither a string nor an array.
-         *   2. Some constituent is a string and target is less than ES5 (because in ES3 string is not indexable).
-         */
-        function checkElementTypeOfArrayOrString(arrayOrStringType: Type, errorNode: Node): Type {
-            Debug.assert(languageVersion < ScriptTarget.ES6);
-
-            // After we remove all types that are StringLike, we will know if there was a string constituent
-            // based on whether the remaining type is the same as the initial type.
-            let arrayType = arrayOrStringType;
-            if (arrayOrStringType.flags & TypeFlags.Union) {
-                arrayType = getUnionType(filter((arrayOrStringType as UnionType).types, t => !(t.flags & TypeFlags.StringLike)), /*subtypeReduction*/ true);
-            }
-            else if (arrayOrStringType.flags & TypeFlags.StringLike) {
-                arrayType = neverType;
+            let nextResult = getUnionType(map(nextMethodSignatures, getReturnTypeOfSignature), /*subtypeReduction*/ true);
+            if (isTypeAny(nextResult)) {
+                return undefined;
             }
-            const hasStringConstituent = arrayOrStringType !== arrayType;
-            let reportedError = false;
-            if (hasStringConstituent) {
-                if (languageVersion < ScriptTarget.ES5) {
-                    error(errorNode, Diagnostics.Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher);
-                    reportedError = true;
-                }
 
-                // Now that we've removed all the StringLike types, if no constituents remain, then the entire
-                // arrayOrStringType was a string.
-                if (arrayType.flags & TypeFlags.Never) {
-                    return stringType;
+            // For an async iterator, we must get the awaited type of the return type.
+            if (isAsyncIterator) {
+                nextResult = getAwaitedTypeOfPromise(nextResult, errorNode, Diagnostics.The_type_returned_by_the_next_method_of_an_async_iterator_must_be_a_promise_for_a_type_with_a_value_property);
+                if (isTypeAny(nextResult)) {
+                    return undefined;
                 }
             }
 
-            if (!isArrayLikeType(arrayType)) {
-                if (!reportedError) {
-                    // Which error we report depends on whether there was a string constituent. For example,
-                    // if the input type is number | string, we want to say that number is not an array type.
-                    // But if the input was just number, we want to say that number is not an array type
-                    // or a string type.
-                    const diagnostic = hasStringConstituent
-                        ? Diagnostics.Type_0_is_not_an_array_type
-                        : Diagnostics.Type_0_is_not_an_array_type_or_a_string_type;
-                    error(errorNode, diagnostic, typeToString(arrayType));
+            const nextValue = nextResult && getTypeOfPropertyOfType(nextResult, "value");
+            if (!nextValue) {
+                if (errorNode) {
+                    error(errorNode, isAsyncIterator
+                        ? Diagnostics.The_type_returned_by_the_next_method_of_an_async_iterator_must_be_a_promise_for_a_type_with_a_value_property
+                        : Diagnostics.The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property);
                 }
-                return hasStringConstituent ? stringType : unknownType;
+                return undefined;
             }
 
-            const arrayElementType = getIndexTypeOfType(arrayType, IndexKind.Number) || unknownType;
-            if (hasStringConstituent) {
-                // This is just an optimization for the case where arrayOrStringType is string | string[]
-                if (arrayElementType.flags & TypeFlags.StringLike) {
-                    return stringType;
-                }
+            return isAsyncIterator
+                ? typeAsIterator.iteratedTypeOfAsyncIterator = nextValue
+                : typeAsIterator.iteratedTypeOfIterator = nextValue;
+        }
 
-                return getUnionType([arrayElementType, stringType], /*subtypeReduction*/ true);
+        /**
+         * A generator may have a return type of `Iterator<T>`, `Iterable<T>`, or
+         * `IterableIterator<T>`. An async generator may have a return type of `AsyncIterator<T>`,
+         * `AsyncIterable<T>`, or `AsyncIterableIterator<T>`. This function can be used to extract
+         * the iterated type from this return type for contextual typing and verifying signatures.
+         */
+        function getIteratedTypeOfGenerator(returnType: Type, isAsyncGenerator: boolean): Type {
+            if (isTypeAny(returnType)) {
+                return undefined;
             }
 
-            return arrayElementType;
+            return getIteratedTypeOfIterable(returnType, /*errorNode*/ undefined, /*allowAsyncIterables*/ isAsyncGenerator, /*allowSyncIterables*/ !isAsyncGenerator, /*checkAssignability*/ false)
+                || getIteratedTypeOfIterator(returnType, /*errorNode*/ undefined, isAsyncGenerator);
         }
 
         function checkBreakOrContinueStatement(node: BreakOrContinueStatement) {
@@ -16427,11 +20487,14 @@ namespace ts {
         }
 
         function isGetAccessorWithAnnotatedSetAccessor(node: FunctionLikeDeclaration) {
-            return !!(node.kind === SyntaxKind.GetAccessor && getSetAccessorTypeAnnotationNode(<AccessorDeclaration>getDeclarationOfKind(node.symbol, SyntaxKind.SetAccessor)));
+            return node.kind === SyntaxKind.GetAccessor
+                && getEffectiveSetAccessorTypeAnnotationNode(getDeclarationOfKind<SetAccessorDeclaration>(node.symbol, SyntaxKind.SetAccessor)) !== undefined;
         }
 
         function isUnwrappedReturnTypeVoidOrAny(func: FunctionLikeDeclaration, returnType: Type): boolean {
-            const unwrappedReturnType = isAsyncFunctionLike(func) ? getPromisedType(returnType) : returnType;
+            const unwrappedReturnType = (getFunctionFlags(func) & FunctionFlags.AsyncGenerator) === FunctionFlags.Async
+                ? getPromisedTypeOfPromise(returnType) // Async function
+                : returnType; // AsyncGenerator function, Generator function, or normal function
             return unwrappedReturnType && maybeTypeOfKind(unwrappedReturnType, TypeFlags.Void | TypeFlags.Any);
         }
 
@@ -16450,8 +20513,8 @@ namespace ts {
                 const returnType = getReturnTypeOfSignature(signature);
                 if (strictNullChecks || node.expression || returnType.flags & TypeFlags.Never) {
                     const exprType = node.expression ? checkExpressionCached(node.expression) : undefinedType;
-
-                    if (func.asteriskToken) {
+                    const functionFlags = getFunctionFlags(func);
+                    if (functionFlags & FunctionFlags.Generator) { // AsyncGenerator function or Generator function
                         // A generator does not need its return expressions checked against its return type.
                         // Instead, the yield expressions are checked against the element type.
                         // TODO: Check return expressions of generators when return type tracking is added
@@ -16461,27 +20524,27 @@ namespace ts {
 
                     if (func.kind === SyntaxKind.SetAccessor) {
                         if (node.expression) {
-                            error(node.expression, Diagnostics.Setters_cannot_return_a_value);
+                            error(node, Diagnostics.Setters_cannot_return_a_value);
                         }
                     }
                     else if (func.kind === SyntaxKind.Constructor) {
-                        if (node.expression && !checkTypeAssignableTo(exprType, returnType, node.expression)) {
-                            error(node.expression, Diagnostics.Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class);
+                        if (node.expression && !checkTypeAssignableTo(exprType, returnType, node)) {
+                            error(node, Diagnostics.Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class);
                         }
                     }
-                    else if (func.type || isGetAccessorWithAnnotatedSetAccessor(func)) {
-                        if (isAsyncFunctionLike(func)) {
-                            const promisedType = getPromisedType(returnType);
-                            const awaitedType = checkAwaitedType(exprType, node.expression || node, Diagnostics.Return_expression_in_async_function_does_not_have_a_valid_callable_then_member);
+                    else if (getEffectiveReturnTypeNode(func) || isGetAccessorWithAnnotatedSetAccessor(func)) {
+                        if (functionFlags & FunctionFlags.Async) { // Async function
+                            const promisedType = getPromisedTypeOfPromise(returnType);
+                            const awaitedType = checkAwaitedType(exprType, node, Diagnostics.The_return_type_of_an_async_function_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member);
                             if (promisedType) {
                                 // If the function has a return type, but promisedType is
                                 // undefined, an error will be reported in checkAsyncFunctionReturnType
                                 // so we don't need to report one here.
-                                checkTypeAssignableTo(awaitedType, promisedType, node.expression || node);
+                                checkTypeAssignableTo(awaitedType, promisedType, node);
                             }
                         }
                         else {
-                            checkTypeAssignableTo(exprType, returnType, node.expression || node);
+                            checkTypeAssignableTo(exprType, returnType, node);
                         }
                     }
                 }
@@ -16518,6 +20581,7 @@ namespace ts {
             let hasDuplicateDefaultClause = false;
 
             const expressionType = checkExpression(node.expression);
+            const expressionIsLiteral = isLiteralType(expressionType);
             forEach(node.caseBlock.clauses, clause => {
                 // Grammar check for duplicate default clauses, skip if we already report duplicate default clause
                 if (clause.kind === SyntaxKind.DefaultClause && !hasDuplicateDefaultClause) {
@@ -16538,10 +20602,16 @@ namespace ts {
                     // TypeScript 1.0 spec (April 2014): 5.9
                     // In a 'switch' statement, each 'case' expression must be of a type that is comparable
                     // to or from the type of the 'switch' expression.
-                    const caseType = checkExpression(caseClause.expression);
-                    if (!isTypeEqualityComparableTo(expressionType, caseType)) {
+                    let caseType = checkExpression(caseClause.expression);
+                    const caseIsLiteral = isLiteralType(caseType);
+                    let comparedExpressionType = expressionType;
+                    if (!caseIsLiteral || !expressionIsLiteral) {
+                        caseType = caseIsLiteral ? getBaseTypeOfLiteralType(caseType) : caseType;
+                        comparedExpressionType = getBaseTypeOfLiteralType(expressionType);
+                    }
+                    if (!isTypeEqualityComparableTo(comparedExpressionType, caseType)) {
                         // expressionType is not comparable to caseType, try the reversed check and report errors if it fails
-                        checkTypeComparableTo(caseType, expressionType, caseClause.expression, /*headMessage*/ undefined);
+                        checkTypeComparableTo(caseType, comparedExpressionType, caseClause.expression, /*headMessage*/ undefined);
                     }
                 }
                 forEach(clause.statements, checkSourceElement);
@@ -16554,18 +20624,17 @@ namespace ts {
         function checkLabeledStatement(node: LabeledStatement) {
             // Grammar checking
             if (!checkGrammarStatementInAmbientContext(node)) {
-                let current = node.parent;
-                while (current) {
-                    if (isFunctionLike(current)) {
-                        break;
-                    }
-                    if (current.kind === SyntaxKind.LabeledStatement && (<LabeledStatement>current).label.text === node.label.text) {
-                        const sourceFile = getSourceFileOfNode(node);
-                        grammarErrorOnNode(node.label, Diagnostics.Duplicate_label_0, getTextOfNodeFromSourceText(sourceFile.text, node.label));
-                        break;
-                    }
-                    current = current.parent;
-                }
+                findAncestor(node.parent,
+                             current => {
+                                 if (isFunctionLike(current)) {
+                                     return "quit";
+                                 }
+                                 if (current.kind === SyntaxKind.LabeledStatement && (<LabeledStatement>current).label.text === node.label.text) {
+                                     const sourceFile = getSourceFileOfNode(node);
+                                     grammarErrorOnNode(node.label, Diagnostics.Duplicate_label_0, getTextOfNodeFromSourceText(sourceFile.text, node.label));
+                                     return true;
+                                 }
+                             });
             }
 
             // ensure that label is unique
@@ -16594,23 +20663,21 @@ namespace ts {
             if (catchClause) {
                 // Grammar checking
                 if (catchClause.variableDeclaration) {
-                    if (catchClause.variableDeclaration.name.kind !== SyntaxKind.Identifier) {
-                        grammarErrorOnFirstToken(catchClause.variableDeclaration.name, Diagnostics.Catch_clause_variable_name_must_be_an_identifier);
-                    }
-                    else if (catchClause.variableDeclaration.type) {
+                    if (catchClause.variableDeclaration.type) {
                         grammarErrorOnFirstToken(catchClause.variableDeclaration.type, Diagnostics.Catch_clause_variable_cannot_have_a_type_annotation);
                     }
                     else if (catchClause.variableDeclaration.initializer) {
                         grammarErrorOnFirstToken(catchClause.variableDeclaration.initializer, Diagnostics.Catch_clause_variable_cannot_have_an_initializer);
                     }
                     else {
-                        const identifierName = (<Identifier>catchClause.variableDeclaration.name).text;
-                        const locals = catchClause.block.locals;
-                        if (locals) {
-                            const localSymbol = locals[identifierName];
-                            if (localSymbol && (localSymbol.flags & SymbolFlags.BlockScopedVariable) !== 0) {
-                                grammarErrorOnNode(localSymbol.valueDeclaration, Diagnostics.Cannot_redeclare_identifier_0_in_catch_clause, identifierName);
-                            }
+                        const blockLocals = catchClause.block.locals;
+                        if (blockLocals) {
+                            forEachKey(catchClause.locals, caughtName => {
+                                const blockLocal = blockLocals.get(caughtName);
+                                if (blockLocal && (blockLocal.flags & SymbolFlags.BlockScopedVariable) !== 0) {
+                                    grammarErrorOnNode(blockLocal.valueDeclaration, Diagnostics.Cannot_redeclare_identifier_0_in_catch_clause, caughtName);
+                                }
+                            });
                         }
                     }
                 }
@@ -16637,7 +20704,7 @@ namespace ts {
                     checkIndexConstraintForProperty(prop, propType, type, declaredNumberIndexer, numberIndexType, IndexKind.Number);
                 });
 
-                if (type.flags & TypeFlags.Class && isClassLike(type.symbol.valueDeclaration)) {
+                if (getObjectFlags(type) & ObjectFlags.Class && isClassLike(type.symbol.valueDeclaration)) {
                     const classDeclaration = <ClassLikeDeclaration>type.symbol.valueDeclaration;
                     for (const member of classDeclaration.members) {
                         // Only process instance properties with computed names here.
@@ -16656,7 +20723,7 @@ namespace ts {
             if (stringIndexType && numberIndexType) {
                 errorNode = declaredNumberIndexer || declaredStringIndexer;
                 // condition 'errorNode === undefined' may appear if types does not declare nor string neither number indexer
-                if (!errorNode && (type.flags & TypeFlags.Interface)) {
+                if (!errorNode && (getObjectFlags(type) & ObjectFlags.Interface)) {
                     const someBaseTypeHasBothIndexers = forEach(getBaseTypes(<InterfaceType>type), base => getIndexTypeOfType(base, IndexKind.String) && getIndexTypeOfType(base, IndexKind.Number));
                     errorNode = someBaseTypeHasBothIndexers ? undefined : type.symbol.declarations[0];
                 }
@@ -16679,21 +20746,26 @@ namespace ts {
                     return;
                 }
 
+                const propDeclaration = prop.valueDeclaration;
+
                 // index is numeric and property name is not valid numeric literal
-                if (indexKind === IndexKind.Number && !isNumericName(prop.valueDeclaration.name)) {
+                if (indexKind === IndexKind.Number && !(propDeclaration ? isNumericName(getNameOfDeclaration(propDeclaration)) : isNumericLiteralName(prop.name))) {
                     return;
                 }
 
                 // perform property check if property or indexer is declared in 'type'
-                // this allows to rule out cases when both property and indexer are inherited from the base class
+                // this allows us to rule out cases when both property and indexer are inherited from the base class
                 let errorNode: Node;
-                if (prop.valueDeclaration.name.kind === SyntaxKind.ComputedPropertyName || prop.parent === containingType.symbol) {
-                    errorNode = prop.valueDeclaration;
+                if (propDeclaration &&
+                    (propDeclaration.kind === SyntaxKind.BinaryExpression ||
+                     getNameOfDeclaration(propDeclaration).kind === SyntaxKind.ComputedPropertyName ||
+                     prop.parent === containingType.symbol)) {
+                    errorNode = propDeclaration;
                 }
                 else if (indexDeclaration) {
                     errorNode = indexDeclaration;
                 }
-                else if (containingType.flags & TypeFlags.Interface) {
+                else if (getObjectFlags(containingType) & ObjectFlags.Interface) {
                     // for interfaces property and indexer might be inherited from different bases
                     // check if any base class already has both property and indexer.
                     // check should be performed only if 'type' is the first type that brings property\indexer together
@@ -16721,18 +20793,28 @@ namespace ts {
                 case "string":
                 case "symbol":
                 case "void":
+                case "object":
                     error(name, message, (<Identifier>name).text);
             }
         }
 
-        /** Check each type parameter and check that type parameters have no duplicate type parameter declarations */
+        /**
+         * Check each type parameter and check that type parameters have no duplicate type parameter declarations
+         */
         function checkTypeParameters(typeParameterDeclarations: TypeParameterDeclaration[]) {
             if (typeParameterDeclarations) {
-                for (let i = 0, n = typeParameterDeclarations.length; i < n; i++) {
+                let seenDefault = false;
+                for (let i = 0; i < typeParameterDeclarations.length; i++) {
                     const node = typeParameterDeclarations[i];
                     checkTypeParameter(node);
 
                     if (produceDiagnostics) {
+                        if (node.default) {
+                            seenDefault = true;
+                        }
+                        else if (seenDefault) {
+                            error(node, Diagnostics.Required_type_parameters_may_not_follow_optional_type_parameters);
+                        }
                         for (let j = 0; j < i; j++) {
                             if (typeParameterDeclarations[j].symbol === node.symbol) {
                                 error(node.name, Diagnostics.Duplicate_identifier_0, declarationNameToString(node.name));
@@ -16744,21 +20826,71 @@ namespace ts {
         }
 
         /** Check that type parameter lists are identical across multiple declarations */
-        function checkTypeParameterListsIdentical(node: ClassLikeDeclaration | InterfaceDeclaration, symbol: Symbol) {
+        function checkTypeParameterListsIdentical(symbol: Symbol) {
             if (symbol.declarations.length === 1) {
                 return;
             }
-            let firstDecl: ClassLikeDeclaration | InterfaceDeclaration;
-            for (const declaration of symbol.declarations) {
-                if (declaration.kind === SyntaxKind.ClassDeclaration || declaration.kind === SyntaxKind.InterfaceDeclaration) {
-                    if (!firstDecl) {
-                        firstDecl = <ClassLikeDeclaration | InterfaceDeclaration>declaration;
+
+            const links = getSymbolLinks(symbol);
+            if (!links.typeParametersChecked) {
+                links.typeParametersChecked = true;
+                const declarations = getClassOrInterfaceDeclarationsOfSymbol(symbol);
+                if (declarations.length <= 1) {
+                    return;
+                }
+
+                const type = <InterfaceType>getDeclaredTypeOfSymbol(symbol);
+                if (!areTypeParametersIdentical(declarations, type.localTypeParameters)) {
+                    // Report an error on every conflicting declaration.
+                    const name = symbolToString(symbol);
+                    for (const declaration of declarations) {
+                        error(declaration.name, Diagnostics.All_declarations_of_0_must_have_identical_type_parameters, name);
+                    }
+                }
+            }
+        }
+
+        function areTypeParametersIdentical(declarations: (ClassDeclaration | InterfaceDeclaration)[], typeParameters: TypeParameter[]) {
+            const maxTypeArgumentCount = length(typeParameters);
+            const minTypeArgumentCount = getMinTypeArgumentCount(typeParameters);
+
+            for (const declaration of declarations) {
+                // If this declaration has too few or too many type parameters, we report an error
+                const numTypeParameters = length(declaration.typeParameters);
+                if (numTypeParameters < minTypeArgumentCount || numTypeParameters > maxTypeArgumentCount) {
+                    return false;
+                }
+
+                for (let i = 0; i < numTypeParameters; i++) {
+                    const source = declaration.typeParameters[i];
+                    const target = typeParameters[i];
+
+                    // If the type parameter node does not have the same as the resolved type
+                    // parameter at this position, we report an error.
+                    if (source.name.text !== target.symbol.name) {
+                        return false;
+                    }
+
+                    // If the type parameter node does not have an identical constraint as the resolved
+                    // type parameter at this position, we report an error.
+                    const sourceConstraint = source.constraint && getTypeFromTypeNode(source.constraint);
+                    const targetConstraint = getConstraintFromTypeParameter(target);
+                    if ((sourceConstraint || targetConstraint) &&
+                        (!sourceConstraint || !targetConstraint || !isTypeIdenticalTo(sourceConstraint, targetConstraint))) {
+                        return false;
                     }
-                    else if (!areTypeParametersIdentical(firstDecl.typeParameters, node.typeParameters)) {
-                        error(node.name, Diagnostics.All_declarations_of_0_must_have_identical_type_parameters, node.name.text);
+
+                    // If the type parameter node has a default and it is not identical to the default
+                    // for the type parameter at this position, we report an error.
+                    const sourceDefault = source.default && getTypeFromTypeNode(source.default);
+                    const targetDefault = getDefaultFromTypeParameter(target);
+                    if (sourceDefault && targetDefault && !isTypeIdenticalTo(sourceDefault, targetDefault)) {
+                        return false;
                     }
                 }
             }
+
+            return true;
         }
 
         function checkClassExpression(node: ClassExpression): Type {
@@ -16783,11 +20915,12 @@ namespace ts {
         }
 
         function checkClassLikeDeclaration(node: ClassLikeDeclaration) {
-            checkGrammarClassDeclarationHeritageClauses(node);
+            checkGrammarClassLikeDeclaration(node);
             checkDecorators(node);
             if (node.name) {
                 checkTypeNameIsReserved(node.name, Diagnostics.Class_name_cannot_be_0);
                 checkCollisionWithCapturedThisVariable(node, node.name);
+                checkCollisionWithCapturedNewTargetVariable(node, node.name);
                 checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
                 checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
             }
@@ -16797,20 +20930,30 @@ namespace ts {
             const type = <InterfaceType>getDeclaredTypeOfSymbol(symbol);
             const typeWithThis = getTypeWithThisArgument(type);
             const staticType = <ObjectType>getTypeOfSymbol(symbol);
-            checkTypeParameterListsIdentical(node, symbol);
+            checkTypeParameterListsIdentical(symbol);
             checkClassForDuplicateDeclarations(node);
 
+            // Only check for reserved static identifiers on non-ambient context.
+            if (!isInAmbientContext(node)) {
+                checkClassForStaticPropertyNameConflicts(node);
+            }
+
             const baseTypeNode = getClassExtendsHeritageClauseElement(node);
             if (baseTypeNode) {
+                if (languageVersion < ScriptTarget.ES2015) {
+                    checkExternalEmitHelpers(baseTypeNode.parent, ExternalEmitHelpers.Extends);
+                }
+
                 const baseTypes = getBaseTypes(type);
                 if (baseTypes.length && produceDiagnostics) {
                     const baseType = baseTypes[0];
-                    const staticBaseType = getBaseConstructorTypeOfClass(type);
+                    const baseConstructorType = getBaseConstructorTypeOfClass(type);
+                    const staticBaseType = getApparentType(baseConstructorType);
                     checkBaseTypeAccessibility(staticBaseType, baseTypeNode);
                     checkSourceElement(baseTypeNode.expression);
-                    if (baseTypeNode.typeArguments) {
+                    if (some(baseTypeNode.typeArguments)) {
                         forEach(baseTypeNode.typeArguments, checkSourceElement);
-                        for (const constructor of getConstructorsForTypeArguments(staticBaseType, baseTypeNode.typeArguments)) {
+                        for (const constructor of getConstructorsForTypeArguments(staticBaseType, baseTypeNode.typeArguments, baseTypeNode)) {
                             if (!checkTypeArgumentConstraints(constructor.typeParameters, baseTypeNode.typeArguments)) {
                                 break;
                             }
@@ -16819,19 +20962,16 @@ namespace ts {
                     checkTypeAssignableTo(typeWithThis, getTypeWithThisArgument(baseType, type.thisType), node.name || node, Diagnostics.Class_0_incorrectly_extends_base_class_1);
                     checkTypeAssignableTo(staticType, getTypeWithoutSignatures(staticBaseType), node.name || node,
                         Diagnostics.Class_static_side_0_incorrectly_extends_base_class_static_side_1);
-
-                    if (baseType.symbol.valueDeclaration && !isInAmbientContext(baseType.symbol.valueDeclaration)) {
-                        if (!isBlockScopedNameDeclaredBeforeUse(baseType.symbol.valueDeclaration, node)) {
-                            error(baseTypeNode, Diagnostics.A_class_must_be_declared_after_its_base_class);
-                        }
+                    if (baseConstructorType.flags & TypeFlags.TypeVariable && !isMixinConstructorType(staticType)) {
+                        error(node.name || node, Diagnostics.A_mixin_class_must_have_a_constructor_with_a_single_rest_parameter_of_type_any);
                     }
 
-                    if (!(staticBaseType.symbol && staticBaseType.symbol.flags & SymbolFlags.Class)) {
+                    if (!(staticBaseType.symbol && staticBaseType.symbol.flags & SymbolFlags.Class) && !(baseConstructorType.flags & TypeFlags.TypeVariable)) {
                         // When the static base type is a "class-like" constructor function (but not actually a class), we verify
                         // that all instantiated base constructor signatures return the same type. We can simply compare the type
                         // references (as opposed to checking the structure of the types) because elsewhere we have already checked
                         // that the base type is a class or interface type (and not, for example, an anonymous object type).
-                        const constructors = getInstantiatedConstructorsForTypeArguments(staticBaseType, baseTypeNode.typeArguments);
+                        const constructors = getInstantiatedConstructorsForTypeArguments(staticBaseType, baseTypeNode.typeArguments, baseTypeNode);
                         if (forEach(constructors, sig => getReturnTypeOfSignature(sig) !== baseType)) {
                             error(baseTypeNode.expression, Diagnostics.Base_constructors_must_all_have_the_same_return_type);
                         }
@@ -16850,8 +20990,7 @@ namespace ts {
                     if (produceDiagnostics) {
                         const t = getTypeFromTypeNode(typeRefNode);
                         if (t !== unknownType) {
-                            const declaredType = (t.flags & TypeFlags.Reference) ? (<TypeReference>t).target : t;
-                            if (declaredType.flags & (TypeFlags.Class | TypeFlags.Interface)) {
+                            if (isValidBaseType(t)) {
                                 checkTypeAssignableTo(typeWithThis, getTypeWithThisArgument(t, type.thisType), node.name || node, Diagnostics.Class_0_incorrectly_implements_interface_1);
                             }
                             else {
@@ -16868,14 +21007,14 @@ namespace ts {
             }
         }
 
-        function checkBaseTypeAccessibility(type: ObjectType, node: ExpressionWithTypeArguments) {
+        function checkBaseTypeAccessibility(type: Type, node: ExpressionWithTypeArguments) {
             const signatures = getSignaturesOfType(type, SignatureKind.Construct);
             if (signatures.length) {
                 const declaration = signatures[0].declaration;
                 if (declaration && getModifierFlags(declaration) & ModifierFlags.Private) {
                     const typeClassDeclaration = <ClassLikeDeclaration>getClassLikeDeclarationOfSymbol(type.symbol);
                     if (!isNodeWithinClass(node, typeClassDeclaration)) {
-                        error(node, Diagnostics.Cannot_extend_a_class_0_Class_constructor_is_marked_as_private, (<Identifier>node.expression).text);
+                        error(node, Diagnostics.Cannot_extend_a_class_0_Class_constructor_is_marked_as_private, getFullyQualifiedName(type.symbol));
                     }
                 }
             }
@@ -16884,14 +21023,19 @@ namespace ts {
         function getTargetSymbol(s: Symbol) {
             // if symbol is instantiated its flags are not copied from the 'target'
             // so we'll need to get back original 'target' symbol to work with correct set of flags
-            return s.flags & SymbolFlags.Instantiated ? getSymbolLinks(s).target : s;
+            return getCheckFlags(s) & CheckFlags.Instantiated ? (<TransientSymbol>s).target : s;
         }
 
         function getClassLikeDeclarationOfSymbol(symbol: Symbol): Declaration {
             return forEach(symbol.declarations, d => isClassLike(d) ? d : undefined);
         }
 
-        function checkKindsOfPropertyMemberOverrides(type: InterfaceType, baseType: ObjectType): void {
+        function getClassOrInterfaceDeclarationsOfSymbol(symbol: Symbol) {
+            return filter(symbol.declarations, (d: Declaration): d is ClassDeclaration | InterfaceDeclaration =>
+                d.kind === SyntaxKind.ClassDeclaration || d.kind === SyntaxKind.InterfaceDeclaration);
+        }
+
+        function checkKindsOfPropertyMemberOverrides(type: InterfaceType, baseType: BaseType): void {
 
             // TypeScript 1.0 spec (April 2014): 8.2.3
             // A derived class inherits all members from its base class it doesn't override.
@@ -16908,7 +21052,7 @@ namespace ts {
             // derived class instance member variables and accessors, but not by other kinds of members.
 
             // NOTE: assignability is checked in checkClassDeclaration
-            const baseProperties = getPropertiesOfObjectType(baseType);
+            const baseProperties = getPropertiesOfType(baseType);
             for (const baseProperty of baseProperties) {
                 const base = getTargetSymbol(baseProperty);
 
@@ -16947,80 +21091,38 @@ namespace ts {
                     else {
                         // derived overrides base.
                         const derivedDeclarationFlags = getDeclarationModifierFlagsFromSymbol(derived);
-                        if ((baseDeclarationFlags & ModifierFlags.Private) || (derivedDeclarationFlags & ModifierFlags.Private)) {
+                        if (baseDeclarationFlags & ModifierFlags.Private || derivedDeclarationFlags & ModifierFlags.Private) {
                             // either base or derived property is private - not override, skip it
                             continue;
                         }
 
-                        if ((baseDeclarationFlags & ModifierFlags.Static) !== (derivedDeclarationFlags & ModifierFlags.Static)) {
-                            // value of 'static' is not the same for properties - not override, skip it
-                            continue;
-                        }
-
-                        if ((base.flags & derived.flags & SymbolFlags.Method) || ((base.flags & SymbolFlags.PropertyOrAccessor) && (derived.flags & SymbolFlags.PropertyOrAccessor))) {
+                        if (isMethodLike(base) && isMethodLike(derived) || base.flags & SymbolFlags.PropertyOrAccessor && derived.flags & SymbolFlags.PropertyOrAccessor) {
                             // method is overridden with method or property/accessor is overridden with property/accessor - correct case
                             continue;
                         }
 
                         let errorMessage: DiagnosticMessage;
-                        if (base.flags & SymbolFlags.Method) {
+                        if (isMethodLike(base)) {
                             if (derived.flags & SymbolFlags.Accessor) {
                                 errorMessage = Diagnostics.Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_accessor;
                             }
                             else {
-                                Debug.assert((derived.flags & SymbolFlags.Property) !== 0);
                                 errorMessage = Diagnostics.Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_property;
                             }
                         }
                         else if (base.flags & SymbolFlags.Property) {
-                            Debug.assert((derived.flags & SymbolFlags.Method) !== 0);
                             errorMessage = Diagnostics.Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_function;
                         }
                         else {
-                            Debug.assert((base.flags & SymbolFlags.Accessor) !== 0);
-                            Debug.assert((derived.flags & SymbolFlags.Method) !== 0);
                             errorMessage = Diagnostics.Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_function;
                         }
 
-                        error(derived.valueDeclaration.name, errorMessage, typeToString(baseType), symbolToString(base), typeToString(type));
+                        error(getNameOfDeclaration(derived.valueDeclaration) || derived.valueDeclaration, errorMessage, typeToString(baseType), symbolToString(base), typeToString(type));
                     }
                 }
             }
         }
 
-        function isAccessor(kind: SyntaxKind): boolean {
-            return kind === SyntaxKind.GetAccessor || kind === SyntaxKind.SetAccessor;
-        }
-
-        function areTypeParametersIdentical(list1: TypeParameterDeclaration[], list2: TypeParameterDeclaration[]) {
-            if (!list1 && !list2) {
-                return true;
-            }
-            if (!list1 || !list2 || list1.length !== list2.length) {
-                return false;
-            }
-            // TypeScript 1.0 spec (April 2014):
-            // When a generic interface has multiple declarations,  all declarations must have identical type parameter
-            // lists, i.e. identical type parameter names with identical constraints in identical order.
-            for (let i = 0, len = list1.length; i < len; i++) {
-                const tp1 = list1[i];
-                const tp2 = list2[i];
-                if (tp1.name.text !== tp2.name.text) {
-                    return false;
-                }
-                if (!tp1.constraint && !tp2.constraint) {
-                    continue;
-                }
-                if (!tp1.constraint || !tp2.constraint) {
-                    return false;
-                }
-                if (!isTypeIdenticalTo(getTypeFromTypeNode(tp1.constraint), getTypeFromTypeNode(tp2.constraint))) {
-                    return false;
-                }
-            }
-            return true;
-        }
-
         function checkInheritedPropertiesAreIdentical(type: InterfaceType, typeNode: Node): boolean {
             const baseTypes = getBaseTypes(type);
             if (baseTypes.length < 2) {
@@ -17028,15 +21130,15 @@ namespace ts {
             }
 
             const seen = createMap<{ prop: Symbol; containingType: Type }>();
-            forEach(resolveDeclaredMembers(type).declaredProperties, p => { seen[p.name] = { prop: p, containingType: type }; });
+            forEach(resolveDeclaredMembers(type).declaredProperties, p => { seen.set(p.name, { prop: p, containingType: type }); });
             let ok = true;
 
             for (const base of baseTypes) {
-                const properties = getPropertiesOfObjectType(getTypeWithThisArgument(base, type.thisType));
+                const properties = getPropertiesOfType(getTypeWithThisArgument(base, type.thisType));
                 for (const prop of properties) {
-                    const existing = seen[prop.name];
+                    const existing = seen.get(prop.name);
                     if (!existing) {
-                        seen[prop.name] = { prop: prop, containingType: base };
+                        seen.set(prop.name, { prop: prop, containingType: base });
                     }
                     else {
                         const isInheritedProperty = existing.containingType !== type;
@@ -17046,7 +21148,7 @@ namespace ts {
                             const typeName1 = typeToString(existing.containingType);
                             const typeName2 = typeToString(base);
 
-                            let errorInfo = chainDiagnosticMessages(undefined, Diagnostics.Named_property_0_of_types_1_and_2_are_not_identical, symbolToString(prop), typeName1, typeName2);
+                            let errorInfo = chainDiagnosticMessages(/*details*/ undefined, Diagnostics.Named_property_0_of_types_1_and_2_are_not_identical, symbolToString(prop), typeName1, typeName2);
                             errorInfo = chainDiagnosticMessages(errorInfo, Diagnostics.Interface_0_cannot_simultaneously_extend_types_1_and_2, typeToString(type), typeName1, typeName2);
                             diagnostics.add(createDiagnosticForNodeFromMessageChain(typeNode, errorInfo));
                         }
@@ -17067,10 +21169,10 @@ namespace ts {
 
                 checkExportsOnMergedDeclarations(node);
                 const symbol = getSymbolOfNode(node);
-                checkTypeParameterListsIdentical(node, symbol);
+                checkTypeParameterListsIdentical(symbol);
 
                 // Only check this symbol once
-                const firstInterfaceDecl = <InterfaceDeclaration>getDeclarationOfKind(symbol, SyntaxKind.InterfaceDeclaration);
+                const firstInterfaceDecl = getDeclarationOfKind<InterfaceDeclaration>(symbol, SyntaxKind.InterfaceDeclaration);
                 if (node === firstInterfaceDecl) {
                     const type = <InterfaceType>getDeclaredTypeOfSymbol(symbol);
                     const typeWithThis = getTypeWithThisArgument(type);
@@ -17104,112 +21206,97 @@ namespace ts {
             checkGrammarDecorators(node) || checkGrammarModifiers(node);
 
             checkTypeNameIsReserved(node.name, Diagnostics.Type_alias_name_cannot_be_0);
+            checkTypeParameters(node.typeParameters);
             checkSourceElement(node.type);
         }
 
         function computeEnumMemberValues(node: EnumDeclaration) {
             const nodeLinks = getNodeLinks(node);
-
             if (!(nodeLinks.flags & NodeCheckFlags.EnumValuesComputed)) {
-                const enumSymbol = getSymbolOfNode(node);
-                const enumType = getDeclaredTypeOfSymbol(enumSymbol);
-                let autoValue = 0; // set to undefined when enum member is non-constant
-                const ambient = isInAmbientContext(node);
-                const enumIsConst = isConst(node);
-
+                nodeLinks.flags |= NodeCheckFlags.EnumValuesComputed;
+                let autoValue = 0;
                 for (const member of node.members) {
-                    if (isComputedNonLiteralName(<PropertyName>member.name)) {
-                        error(member.name, Diagnostics.Computed_property_names_are_not_allowed_in_enums);
-                    }
-                    else {
-                        const text = getTextOfPropertyName(<PropertyName>member.name);
-                        if (isNumericLiteralName(text) && !isInfinityOrNaNString(text)) {
-                            error(member.name, Diagnostics.An_enum_member_cannot_have_a_numeric_name);
-                        }
-                    }
-
-                    const previousEnumMemberIsNonConstant = autoValue === undefined;
-
-                    const initializer = member.initializer;
-                    if (initializer) {
-                        autoValue = computeConstantValueForEnumMemberInitializer(initializer, enumType, enumIsConst, ambient);
-                    }
-                    else if (ambient && !enumIsConst) {
-                        // In ambient enum declarations that specify no const modifier, enum member declarations
-                        // that omit a value are considered computed members (as opposed to having auto-incremented values assigned).
-                        autoValue = undefined;
-                    }
-                    else if (previousEnumMemberIsNonConstant) {
-                        // If the member declaration specifies no value, the member is considered a constant enum member.
-                        // If the member is the first member in the enum declaration, it is assigned the value zero.
-                        // Otherwise, it is assigned the value of the immediately preceding member plus one,
-                        // and an error occurs if the immediately preceding member is not a constant enum member
-                        error(member.name, Diagnostics.Enum_member_must_have_initializer);
-                    }
-
-                    if (autoValue !== undefined) {
-                        getNodeLinks(member).enumMemberValue = autoValue;
-                        autoValue++;
-                    }
+                    const value = computeMemberValue(member, autoValue);
+                    getNodeLinks(member).enumMemberValue = value;
+                    autoValue = typeof value === "number" ? value + 1 : undefined;
                 }
-
-                nodeLinks.flags |= NodeCheckFlags.EnumValuesComputed;
             }
+        }
 
-            function computeConstantValueForEnumMemberInitializer(initializer: Expression, enumType: Type, enumIsConst: boolean, ambient: boolean): number {
-                // Controls if error should be reported after evaluation of constant value is completed
-                // Can be false if another more precise error was already reported during evaluation.
-                let reportError = true;
-                const value = evalConstant(initializer);
-
-                if (reportError) {
-                    if (value === undefined) {
-                        if (enumIsConst) {
-                            error(initializer, Diagnostics.In_const_enum_declarations_member_initializer_must_be_constant_expression);
-                        }
-                        else if (ambient) {
-                            error(initializer, Diagnostics.In_ambient_enum_declarations_member_initializer_must_be_constant_expression);
-                        }
-                        else {
-                            // Only here do we need to check that the initializer is assignable to the enum type.
-                            checkTypeAssignableTo(checkExpression(initializer), enumType, initializer, /*headMessage*/ undefined);
-                        }
-                    }
-                    else if (enumIsConst) {
-                        if (isNaN(value)) {
-                            error(initializer, Diagnostics.const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN);
-                        }
-                        else if (!isFinite(value)) {
-                            error(initializer, Diagnostics.const_enum_member_initializer_was_evaluated_to_a_non_finite_value);
-                        }
-                    }
+        function computeMemberValue(member: EnumMember, autoValue: number) {
+            if (isComputedNonLiteralName(<PropertyName>member.name)) {
+                error(member.name, Diagnostics.Computed_property_names_are_not_allowed_in_enums);
+            }
+            else {
+                const text = getTextOfPropertyName(<PropertyName>member.name);
+                if (isNumericLiteralName(text) && !isInfinityOrNaNString(text)) {
+                    error(member.name, Diagnostics.An_enum_member_cannot_have_a_numeric_name);
                 }
+            }
+            if (member.initializer) {
+                return computeConstantValue(member);
+            }
+            // In ambient enum declarations that specify no const modifier, enum member declarations that omit
+            // a value are considered computed members (as opposed to having auto-incremented values).
+            if (isInAmbientContext(member.parent) && !isConst(member.parent)) {
+                return undefined;
+            }
+            // If the member declaration specifies no value, the member is considered a constant enum member.
+            // If the member is the first member in the enum declaration, it is assigned the value zero.
+            // Otherwise, it is assigned the value of the immediately preceding member plus one, and an error
+            // occurs if the immediately preceding member is not a constant enum member.
+            if (autoValue !== undefined) {
+                return autoValue;
+            }
+            error(member.name, Diagnostics.Enum_member_must_have_initializer);
+            return undefined;
+        }
 
-                return value;
+        function computeConstantValue(member: EnumMember): string | number {
+            const enumKind = getEnumKind(getSymbolOfNode(member.parent));
+            const isConstEnum = isConst(member.parent);
+            const initializer = member.initializer;
+            const value = enumKind === EnumKind.Literal && !isLiteralEnumMember(member) ? undefined : evaluate(initializer);
+            if (value !== undefined) {
+                if (isConstEnum && typeof value === "number" && !isFinite(value)) {
+                    error(initializer, isNaN(value) ?
+                        Diagnostics.const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN :
+                        Diagnostics.const_enum_member_initializer_was_evaluated_to_a_non_finite_value);
+                }
+            }
+            else if (enumKind === EnumKind.Literal) {
+                error(initializer, Diagnostics.Computed_values_are_not_permitted_in_an_enum_with_string_valued_members);
+                return 0;
+            }
+            else if (isConstEnum) {
+                error(initializer, Diagnostics.In_const_enum_declarations_member_initializer_must_be_constant_expression);
+            }
+            else if (isInAmbientContext(member.parent)) {
+                error(initializer, Diagnostics.In_ambient_enum_declarations_member_initializer_must_be_constant_expression);
+            }
+            else {
+                // Only here do we need to check that the initializer is assignable to the enum type.
+                checkTypeAssignableTo(checkExpression(initializer), getDeclaredTypeOfSymbol(getSymbolOfNode(member.parent)), initializer, /*headMessage*/ undefined);
+            }
+            return value;
 
-                function evalConstant(e: Node): number {
-                    switch (e.kind) {
-                        case SyntaxKind.PrefixUnaryExpression:
-                            const value = evalConstant((<PrefixUnaryExpression>e).operand);
-                            if (value === undefined) {
-                                return undefined;
-                            }
-                            switch ((<PrefixUnaryExpression>e).operator) {
+            function evaluate(expr: Expression): string | number {
+                switch (expr.kind) {
+                    case SyntaxKind.PrefixUnaryExpression:
+                        const value = evaluate((<PrefixUnaryExpression>expr).operand);
+                        if (typeof value === "number") {
+                            switch ((<PrefixUnaryExpression>expr).operator) {
                                 case SyntaxKind.PlusToken: return value;
                                 case SyntaxKind.MinusToken: return -value;
                                 case SyntaxKind.TildeToken: return ~value;
                             }
-                            return undefined;
-                        case SyntaxKind.BinaryExpression:
-                            const left = evalConstant((<BinaryExpression>e).left);
-                            if (left === undefined) {
-                                return undefined;
-                            }
-                            const right = evalConstant((<BinaryExpression>e).right);
-                            if (right === undefined) {
-                                return undefined;
-                            }
-                            switch ((<BinaryExpression>e).operatorToken.kind) {
+                        }
+                        break;
+                    case SyntaxKind.BinaryExpression:
+                        const left = evaluate((<BinaryExpression>expr).left);
+                        const right = evaluate((<BinaryExpression>expr).right);
+                        if (typeof left === "number" && typeof right === "number") {
+                            switch ((<BinaryExpression>expr).operatorToken.kind) {
                                 case SyntaxKind.BarToken: return left | right;
                                 case SyntaxKind.AmpersandToken: return left & right;
                                 case SyntaxKind.GreaterThanGreaterThanToken: return left >> right;
@@ -17222,89 +21309,56 @@ namespace ts {
                                 case SyntaxKind.MinusToken: return left - right;
                                 case SyntaxKind.PercentToken: return left % right;
                             }
-                            return undefined;
-                        case SyntaxKind.NumericLiteral:
-                            return +(<NumericLiteral>e).text;
-                        case SyntaxKind.ParenthesizedExpression:
-                            return evalConstant((<ParenthesizedExpression>e).expression);
-                        case SyntaxKind.Identifier:
-                        case SyntaxKind.ElementAccessExpression:
-                        case SyntaxKind.PropertyAccessExpression:
-                            const member = initializer.parent;
-                            const currentType = getTypeOfSymbol(getSymbolOfNode(member.parent));
-                            let enumType: Type;
-                            let propertyName: string;
-
-                            if (e.kind === SyntaxKind.Identifier) {
-                                // unqualified names can refer to member that reside in different declaration of the enum so just doing name resolution won't work.
-                                // instead pick current enum type and later try to fetch member from the type
-                                enumType = currentType;
-                                propertyName = (<Identifier>e).text;
-                            }
-                            else {
-                                let expression: Expression;
-                                if (e.kind === SyntaxKind.ElementAccessExpression) {
-                                    if ((<ElementAccessExpression>e).argumentExpression === undefined ||
-                                        (<ElementAccessExpression>e).argumentExpression.kind !== SyntaxKind.StringLiteral) {
-                                        return undefined;
-                                    }
-                                    expression = (<ElementAccessExpression>e).expression;
-                                    propertyName = (<LiteralExpression>(<ElementAccessExpression>e).argumentExpression).text;
-                                }
-                                else {
-                                    expression = (<PropertyAccessExpression>e).expression;
-                                    propertyName = (<PropertyAccessExpression>e).name.text;
-                                }
-
-                                // expression part in ElementAccess\PropertyAccess should be either identifier or dottedName
-                                let current = expression;
-                                while (current) {
-                                    if (current.kind === SyntaxKind.Identifier) {
-                                        break;
-                                    }
-                                    else if (current.kind === SyntaxKind.PropertyAccessExpression) {
-                                        current = (<ElementAccessExpression>current).expression;
-                                    }
-                                    else {
-                                        return undefined;
-                                    }
-                                }
-
-                                enumType = checkExpression(expression);
-                                // allow references to constant members of other enums
-                                if (!(enumType.symbol && (enumType.symbol.flags & SymbolFlags.Enum))) {
-                                    return undefined;
-                                }
-                            }
-
-                            if (propertyName === undefined) {
-                                return undefined;
-                            }
-
-                            const property = getPropertyOfObjectType(enumType, propertyName);
-                            if (!property || !(property.flags & SymbolFlags.EnumMember)) {
-                                return undefined;
-                            }
-
-                            const propertyDecl = property.valueDeclaration;
-                            // self references are illegal
-                            if (member === propertyDecl) {
-                                return undefined;
-                            }
-
-                            // illegal case: forward reference
-                            if (!isBlockScopedNameDeclaredBeforeUse(propertyDecl, member)) {
-                                reportError = false;
-                                error(e, Diagnostics.A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums);
-                                return undefined;
+                        }
+                        break;
+                    case SyntaxKind.StringLiteral:
+                        return (<StringLiteral>expr).text;
+                    case SyntaxKind.NumericLiteral:
+                        checkGrammarNumericLiteral(<NumericLiteral>expr);
+                        return +(<NumericLiteral>expr).text;
+                    case SyntaxKind.ParenthesizedExpression:
+                        return evaluate((<ParenthesizedExpression>expr).expression);
+                    case SyntaxKind.Identifier:
+                        return nodeIsMissing(expr) ? 0 : evaluateEnumMember(expr, getSymbolOfNode(member.parent), (<Identifier>expr).text);
+                    case SyntaxKind.ElementAccessExpression:
+                    case SyntaxKind.PropertyAccessExpression:
+                        if (isConstantMemberAccess(expr)) {
+                            const type = getTypeOfExpression((<PropertyAccessExpression | ElementAccessExpression>expr).expression);
+                            if (type.symbol && type.symbol.flags & SymbolFlags.Enum) {
+                                const name = expr.kind === SyntaxKind.PropertyAccessExpression ?
+                                    (<PropertyAccessExpression>expr).name.text :
+                                    (<LiteralExpression>(<ElementAccessExpression>expr).argumentExpression).text;
+                                return evaluateEnumMember(expr, type.symbol, name);
                             }
+                        }
+                        break;
+                }
+                return undefined;
+            }
 
-                            return <number>getNodeLinks(propertyDecl).enumMemberValue;
+            function evaluateEnumMember(expr: Expression, enumSymbol: Symbol, name: string) {
+                const memberSymbol = enumSymbol.exports.get(name);
+                if (memberSymbol) {
+                    const declaration = memberSymbol.valueDeclaration;
+                    if (declaration !== member) {
+                        if (isBlockScopedNameDeclaredBeforeUse(declaration, member)) {
+                            return getNodeLinks(declaration).enumMemberValue;
+                        }
+                        error(expr, Diagnostics.A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums);
+                        return 0;
                     }
                 }
+                return undefined;
             }
         }
 
+        function isConstantMemberAccess(node: Expression): boolean {
+            return node.kind === SyntaxKind.Identifier ||
+                node.kind === SyntaxKind.PropertyAccessExpression && isConstantMemberAccess((<PropertyAccessExpression>node).expression) ||
+                node.kind === SyntaxKind.ElementAccessExpression && isConstantMemberAccess((<ElementAccessExpression>node).expression) &&
+                    (<ElementAccessExpression>node).argumentExpression.kind === SyntaxKind.StringLiteral;
+        }
+
         function checkEnumDeclaration(node: EnumDeclaration) {
             if (!produceDiagnostics) {
                 return;
@@ -17315,6 +21369,7 @@ namespace ts {
 
             checkTypeNameIsReserved(node.name, Diagnostics.Enum_name_cannot_be_0);
             checkCollisionWithCapturedThisVariable(node, node.name);
+            checkCollisionWithCapturedNewTargetVariable(node, node.name);
             checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
             checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
             checkExportsOnMergedDeclarations(node);
@@ -17339,7 +21394,7 @@ namespace ts {
                     // check that const is placed\omitted on all enum declarations
                     forEach(enumSymbol.declarations, decl => {
                         if (isConstEnumDeclaration(decl) !== enumIsConst) {
-                            error(decl.name, Diagnostics.Enum_declarations_must_all_be_const_or_non_const);
+                            error(getNameOfDeclaration(decl), Diagnostics.Enum_declarations_must_all_be_const_or_non_const);
                         }
                     });
                 }
@@ -17419,9 +21474,12 @@ namespace ts {
                     }
                 }
 
-                checkCollisionWithCapturedThisVariable(node, node.name);
-                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
-                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
+                if (isIdentifier(node.name)) {
+                    checkCollisionWithCapturedThisVariable(node, node.name);
+                    checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
+                    checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
+                }
+
                 checkExportsOnMergedDeclarations(node);
                 const symbol = getSymbolOfNode(node);
 
@@ -17456,7 +21514,7 @@ namespace ts {
                         // We can detect if augmentation was applied using following rules:
                         // - augmentation for a global scope is always applied
                         // - augmentation for some external module is applied if symbol for augmentation is merged (it was combined with target module).
-                        const checkBody = isGlobalAugmentation || (getSymbolOfNode(node).flags & SymbolFlags.Merged);
+                        const checkBody = isGlobalAugmentation || (getSymbolOfNode(node).flags & SymbolFlags.Transient);
                         if (checkBody && node.body) {
                             // body of ambient external module is always a module block
                             for (const statement of (<ModuleBlock>node.body).statements) {
@@ -17519,7 +21577,7 @@ namespace ts {
                         }
                         break;
                     }
-                    // fallthrough
+                    // falls through
                 case SyntaxKind.ClassDeclaration:
                 case SyntaxKind.EnumDeclaration:
                 case SyntaxKind.FunctionDeclaration:
@@ -17535,7 +21593,7 @@ namespace ts {
                         // this is done it two steps
                         // 1. quick check - if symbol for node is not merged - this is local symbol to this augmentation - report error
                         // 2. main check - report error if value declaration of the parent symbol is module augmentation)
-                        let reportError = !(symbol.flags & SymbolFlags.Merged);
+                        let reportError = !(symbol.flags & SymbolFlags.Transient);
                         if (!reportError) {
                             // symbol should not originate in augmentation
                             reportError = isExternalModuleAugmentation(symbol.parent.declarations[0]);
@@ -17610,6 +21668,14 @@ namespace ts {
                         Diagnostics.Import_declaration_conflicts_with_local_declaration_of_0;
                     error(node, message, symbolToString(symbol));
                 }
+
+                // Don't allow to re-export something with no value side when `--isolatedModules` is set.
+                if (compilerOptions.isolatedModules
+                    && node.kind === SyntaxKind.ExportSpecifier
+                    && !(target.flags & SymbolFlags.Value)
+                    && !isInAmbientContext(node)) {
+                    error(node, Diagnostics.Cannot_re_export_a_type_when_the_isolatedModules_flag_is_provided);
+                }
             }
         }
 
@@ -17674,7 +21740,7 @@ namespace ts {
                     }
                 }
                 else {
-                    if (modulekind === ModuleKind.ES6 && !isInAmbientContext(node)) {
+                    if (modulekind === ModuleKind.ES2015 && !isInAmbientContext(node)) {
                         // Import equals declaration is deprecated in es6 or above
                         grammarErrorOnNode(node, Diagnostics.Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead);
                     }
@@ -17699,7 +21765,9 @@ namespace ts {
                     forEach(node.exportClause.elements, checkExportSpecifier);
 
                     const inAmbientExternalModule = node.parent.kind === SyntaxKind.ModuleBlock && isAmbientModule(node.parent.parent);
-                    if (node.parent.kind !== SyntaxKind.SourceFile && !inAmbientExternalModule) {
+                    const inAmbientNamespaceDeclaration = !inAmbientExternalModule && node.parent.kind === SyntaxKind.ModuleBlock &&
+                        !node.moduleSpecifier && isInAmbientContext(node);
+                    if (node.parent.kind !== SyntaxKind.SourceFile && !inAmbientExternalModule && !inAmbientNamespaceDeclaration) {
                         error(node, Diagnostics.Export_declarations_are_not_permitted_in_a_namespace);
                     }
                 }
@@ -17709,6 +21777,10 @@ namespace ts {
                     if (moduleSymbol && hasExportAssignmentSymbol(moduleSymbol)) {
                         error(node.moduleSpecifier, Diagnostics.Module_0_uses_export_and_cannot_be_used_with_export_Asterisk, symbolToString(moduleSymbol));
                     }
+
+                    if (modulekind !== ModuleKind.System && modulekind !== ModuleKind.ES2015) {
+                        checkExternalEmitHelpers(node, ExternalEmitHelpers.ExportStar);
+                    }
                 }
             }
         }
@@ -17745,7 +21817,13 @@ namespace ts {
 
             const container = node.parent.kind === SyntaxKind.SourceFile ? <SourceFile>node.parent : <ModuleDeclaration>node.parent.parent;
             if (container.kind === SyntaxKind.ModuleDeclaration && !isAmbientModule(container)) {
-                error(node, Diagnostics.An_export_assignment_cannot_be_used_in_a_namespace);
+                if (node.isExportEquals) {
+                    error(node, Diagnostics.An_export_assignment_cannot_be_used_in_a_namespace);
+                }
+                else {
+                    error(node, Diagnostics.A_default_export_can_only_be_used_in_an_ECMAScript_style_module);
+                }
+
                 return;
             }
             // Grammar checking
@@ -17762,7 +21840,7 @@ namespace ts {
             checkExternalModuleExports(container);
 
             if (node.isExportEquals && !isInAmbientContext(node)) {
-                if (modulekind === ModuleKind.ES6) {
+                if (modulekind === ModuleKind.ES2015) {
                     // export assignment is not supported in es6 modules
                     grammarErrorOnNode(node, Diagnostics.Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_or_another_module_format_instead);
                 }
@@ -17774,19 +21852,14 @@ namespace ts {
         }
 
         function hasExportedMembers(moduleSymbol: Symbol) {
-            for (const id in moduleSymbol.exports) {
-                if (id !== "export=") {
-                    return true;
-                }
-            }
-            return false;
+            return forEachEntry(moduleSymbol.exports, (_, id) => id !== "export=");
         }
 
         function checkExternalModuleExports(node: SourceFile | ModuleDeclaration) {
             const moduleSymbol = getSymbolOfNode(node);
             const links = getSymbolLinks(moduleSymbol);
             if (!links.exportsChecked) {
-                const exportEqualsSymbol = moduleSymbol.exports["export="];
+                const exportEqualsSymbol = moduleSymbol.exports.get("export=");
                 if (exportEqualsSymbol && hasExportedMembers(moduleSymbol)) {
                     const declaration = getDeclarationOfAliasSymbol(exportEqualsSymbol) || exportEqualsSymbol.valueDeclaration;
                     if (!isTopLevelInExternalModuleAugmentation(declaration)) {
@@ -17795,21 +21868,20 @@ namespace ts {
                 }
                 // Checks for export * conflicts
                 const exports = getExportsOfModule(moduleSymbol);
-                for (const id in exports) {
+                exports && exports.forEach(({ declarations, flags }, id) => {
                     if (id === "__export") {
-                        continue;
+                        return;
                     }
-                    const { declarations, flags } = exports[id];
                     // ECMA262: 15.2.1.1 It is a Syntax Error if the ExportedNames of ModuleItemList contains any duplicate entries.
                     // (TS Exceptions: namespaces, function overloads, enums, and interfaces)
                     if (flags & (SymbolFlags.Namespace | SymbolFlags.Interface | SymbolFlags.Enum)) {
-                        continue;
+                        return;
                     }
                     const exportedDeclarationsCount = countWhere(declarations, isNotOverload);
                     if (flags & SymbolFlags.TypeAlias && exportedDeclarationsCount <= 2) {
                         // it is legal to merge type alias with other values
                         // so count should be either 1 (just type alias) or 2 (type alias + merged value)
-                        continue;
+                        return;
                     }
                     if (exportedDeclarationsCount > 1) {
                         for (const declaration of declarations) {
@@ -17818,12 +21890,13 @@ namespace ts {
                             }
                         }
                     }
-                }
+                });
                 links.exportsChecked = true;
             }
 
             function isNotOverload(declaration: Declaration): boolean {
-                return declaration.kind !== SyntaxKind.FunctionDeclaration || !!(declaration as FunctionDeclaration).body;
+                return (declaration.kind !== SyntaxKind.FunctionDeclaration && declaration.kind !== SyntaxKind.MethodDeclaration) ||
+                        !!(declaration as FunctionDeclaration).body;
             }
         }
 
@@ -17884,7 +21957,12 @@ namespace ts {
                 case SyntaxKind.IntersectionType:
                     return checkUnionOrIntersectionType(<UnionOrIntersectionTypeNode>node);
                 case SyntaxKind.ParenthesizedType:
-                    return checkSourceElement((<ParenthesizedTypeNode>node).type);
+                case SyntaxKind.TypeOperator:
+                    return checkSourceElement((<ParenthesizedTypeNode | TypeOperatorNode>node).type);
+                case SyntaxKind.IndexedAccessType:
+                    return checkIndexedAccessType(<IndexedAccessTypeNode>node);
+                case SyntaxKind.MappedType:
+                    return checkMappedType(<MappedTypeNode>node);
                 case SyntaxKind.FunctionDeclaration:
                     return checkFunctionDeclaration(<FunctionDeclaration>node);
                 case SyntaxKind.Block:
@@ -17980,7 +22058,7 @@ namespace ts {
                         break;
                     case SyntaxKind.GetAccessor:
                     case SyntaxKind.SetAccessor:
-                        checkAccessorDeferred(<AccessorDeclaration>node);
+                        checkAccessorDeclaration(<AccessorDeclaration>node);
                         break;
                     case SyntaxKind.ClassExpression:
                         checkClassExpressionDeferred(<ClassExpression>node);
@@ -18011,6 +22089,7 @@ namespace ts {
                 checkGrammarSourceFile(node);
 
                 potentialThisCollisions.length = 0;
+                potentialNewTargetCollisions.length = 0;
 
                 deferredNodes = [];
                 deferredUnusedIdentifierNodes = produceDiagnostics && noUnusedIdentifiers ? [] : undefined;
@@ -18039,6 +22118,11 @@ namespace ts {
                     potentialThisCollisions.length = 0;
                 }
 
+                if (potentialNewTargetCollisions.length) {
+                    forEach(potentialNewTargetCollisions, checkIfNewTargetIsCapturedInEnclosingScope);
+                    potentialNewTargetCollisions.length = 0;
+                }
+
                 links.flags |= NodeCheckFlags.TypeChecked;
             }
         }
@@ -18059,9 +22143,33 @@ namespace ts {
         function getDiagnosticsWorker(sourceFile: SourceFile): Diagnostic[] {
             throwIfNonDiagnosticsProducing();
             if (sourceFile) {
+                // Some global diagnostics are deferred until they are needed and
+                // may not be reported in the firt call to getGlobalDiagnostics.
+                // We should catch these changes and report them.
+                const previousGlobalDiagnostics = diagnostics.getGlobalDiagnostics();
+                const previousGlobalDiagnosticsSize = previousGlobalDiagnostics.length;
+
                 checkSourceFile(sourceFile);
-                return diagnostics.getDiagnostics(sourceFile.fileName);
+
+                const semanticDiagnostics = diagnostics.getDiagnostics(sourceFile.fileName);
+                const currentGlobalDiagnostics = diagnostics.getGlobalDiagnostics();
+                if (currentGlobalDiagnostics !== previousGlobalDiagnostics) {
+                    // If the arrays are not the same reference, new diagnostics were added.
+                    const deferredGlobalDiagnostics = relativeComplement(previousGlobalDiagnostics, currentGlobalDiagnostics, compareDiagnostics);
+                    return concatenate(deferredGlobalDiagnostics, semanticDiagnostics);
+                }
+                else if (previousGlobalDiagnosticsSize === 0 && currentGlobalDiagnostics.length > 0) {
+                    // If the arrays are the same reference, but the length has changed, a single
+                    // new diagnostic was added as DiagnosticCollection attempts to reuse the
+                    // same array.
+                    return concatenate(currentGlobalDiagnostics, semanticDiagnostics);
+                }
+
+                return semanticDiagnostics;
             }
+
+            // Global diagnostics are always added when a file is not provided to
+            // getDiagnostics
             forEach(host.getSourceFiles(), checkSourceFile);
             return diagnostics.getDiagnostics();
         }
@@ -18093,14 +22201,14 @@ namespace ts {
         }
 
         function getSymbolsInScope(location: Node, meaning: SymbolFlags): Symbol[] {
-            const symbols = createMap<Symbol>();
-            let memberFlags: ModifierFlags = ModifierFlags.None;
-
             if (isInsideWithStatementBody(location)) {
                 // We cannot answer semantic questions within a with block, do not proceed any further
                 return [];
             }
 
+            const symbols = createMap<Symbol>();
+            let memberFlags: ModifierFlags = ModifierFlags.None;
+
             populateSymbols();
 
             return symbolsToArray(symbols);
@@ -18116,6 +22224,7 @@ namespace ts {
                             if (!isExternalOrCommonJsModule(<SourceFile>location)) {
                                 break;
                             }
+                            // falls through
                         case SyntaxKind.ModuleDeclaration:
                             copySymbols(getSymbolOfNode(location).exports, meaning & SymbolFlags.ModuleMember);
                             break;
@@ -18127,7 +22236,8 @@ namespace ts {
                             if (className) {
                                 copySymbol(location.symbol, meaning);
                             }
-                        // fall through; this fall-through is necessary because we would like to handle
+                        // falls through
+                        // this fall-through is necessary because we would like to handle
                         // type parameter inside class expression similar to how we handle it in classDeclaration and interface Declaration
                         case SyntaxKind.ClassDeclaration:
                         case SyntaxKind.InterfaceDeclaration:
@@ -18171,18 +22281,17 @@ namespace ts {
                     // We will copy all symbol regardless of its reserved name because
                     // symbolsToArray will check whether the key is a reserved name and
                     // it will not copy symbol with reserved name to the array
-                    if (!symbols[id]) {
-                        symbols[id] = symbol;
+                    if (!symbols.has(id)) {
+                        symbols.set(id, symbol);
                     }
                 }
             }
 
             function copySymbols(source: SymbolTable, meaning: SymbolFlags): void {
                 if (meaning) {
-                    for (const id in source) {
-                        const symbol = source[id];
+                    source.forEach(symbol => {
                         copySymbol(symbol, meaning);
-                    }
+                    });
                 }
             }
         }
@@ -18190,7 +22299,7 @@ namespace ts {
         function isTypeDeclarationName(name: Node): boolean {
             return name.kind === SyntaxKind.Identifier &&
                 isTypeDeclaration(name.parent) &&
-                (<Declaration>name.parent).name === name;
+                (<NamedDeclaration>name.parent).name === name;
         }
 
         function isTypeDeclaration(node: Node): boolean {
@@ -18259,22 +22368,31 @@ namespace ts {
             return getLeftSideOfImportEqualsOrExportAssignment(node) !== undefined;
         }
 
+        function getSpecialPropertyAssignmentSymbolFromEntityName(entityName: EntityName | PropertyAccessExpression) {
+            const specialPropertyAssignmentKind = getSpecialPropertyAssignmentKind(entityName.parent.parent as BinaryExpression);
+            switch (specialPropertyAssignmentKind) {
+                case SpecialPropertyAssignmentKind.ExportsProperty:
+                case SpecialPropertyAssignmentKind.PrototypeProperty:
+                    return getSymbolOfNode(entityName.parent);
+                case SpecialPropertyAssignmentKind.ThisProperty:
+                case SpecialPropertyAssignmentKind.ModuleExports:
+                case SpecialPropertyAssignmentKind.Property:
+                    return getSymbolOfNode(entityName.parent.parent);
+            }
+        }
+
         function getSymbolOfEntityNameOrPropertyAccessExpression(entityName: EntityName | PropertyAccessExpression): Symbol | undefined {
             if (isDeclarationName(entityName)) {
                 return getSymbolOfNode(entityName.parent);
             }
 
-            if (isInJavaScriptFile(entityName) && entityName.parent.kind === SyntaxKind.PropertyAccessExpression) {
-                const specialPropertyAssignmentKind = getSpecialPropertyAssignmentKind(entityName.parent.parent);
-                switch (specialPropertyAssignmentKind) {
-                    case SpecialPropertyAssignmentKind.ExportsProperty:
-                    case SpecialPropertyAssignmentKind.PrototypeProperty:
-                        return getSymbolOfNode(entityName.parent);
-                    case SpecialPropertyAssignmentKind.ThisProperty:
-                    case SpecialPropertyAssignmentKind.ModuleExports:
-                        return getSymbolOfNode(entityName.parent.parent);
-                    default:
-                        // Fall through if it is not a special property assignment
+            if (isInJavaScriptFile(entityName) &&
+                entityName.parent.kind === SyntaxKind.PropertyAccessExpression &&
+                entityName.parent === (entityName.parent.parent as BinaryExpression).left) {
+                // Check if this is a special property assignment
+                const specialPropertyAssignmentSymbol = getSpecialPropertyAssignmentSymbolFromEntityName(entityName);
+                if (specialPropertyAssignmentSymbol) {
+                    return specialPropertyAssignmentSymbol;
                 }
             }
 
@@ -18287,7 +22405,7 @@ namespace ts {
                 // Since we already checked for ExportAssignment, this really could only be an Import
                 const importEqualsDeclaration = <ImportEqualsDeclaration>getAncestor(entityName, SyntaxKind.ImportEqualsDeclaration);
                 Debug.assert(importEqualsDeclaration !== undefined);
-                return getSymbolOfPartOfRightHandSideOfImportEquals(<EntityName>entityName, importEqualsDeclaration, /*dontResolveAlias*/ true);
+                return getSymbolOfPartOfRightHandSideOfImportEquals(<EntityName>entityName, /*dontResolveAlias*/ true);
             }
 
             if (isRightSideOfQualifiedNameOrPropertyAccess(entityName)) {
@@ -18296,7 +22414,6 @@ namespace ts {
 
             if (isHeritageClauseElementIdentifier(<EntityName>entityName)) {
                 let meaning = SymbolFlags.None;
-
                 // In an interface or class, we're definitely interested in a type.
                 if (entityName.parent.kind === SyntaxKind.ExpressionWithTypeArguments) {
                     meaning = SymbolFlags.Type;
@@ -18311,9 +22428,24 @@ namespace ts {
                 }
 
                 meaning |= SymbolFlags.Alias;
-                return resolveEntityName(<EntityName>entityName, meaning);
+                const entityNameSymbol = resolveEntityName(<EntityName>entityName, meaning);
+                if (entityNameSymbol) {
+                    return entityNameSymbol;
+                }
+            }
+
+            if (entityName.parent!.kind === SyntaxKind.JSDocParameterTag) {
+                const parameter = getParameterFromJSDoc(entityName.parent as JSDocParameterTag);
+                return parameter && parameter.symbol;
+            }
+
+            if (entityName.parent.kind === SyntaxKind.TypeParameter && entityName.parent.parent.kind === SyntaxKind.JSDocTemplateTag) {
+                Debug.assert(!isInJavaScriptFile(entityName)); // Otherwise `isDeclarationName` would have been true.
+                const typeParameter = getTypeParameterFromJsDoc(entityName.parent as TypeParameterDeclaration & { parent: JSDocTemplateTag });
+                return typeParameter && typeParameter.symbol;
             }
-            else if (isPartOfExpression(entityName)) {
+
+            if (isPartOfExpression(entityName)) {
                 if (nodeIsMissing(entityName)) {
                     // Missing entity name.
                     return undefined;
@@ -18343,7 +22475,7 @@ namespace ts {
             }
             else if (isTypeReferenceIdentifier(<EntityName>entityName)) {
                 const meaning = (entityName.parent.kind === SyntaxKind.TypeReference || entityName.parent.kind === SyntaxKind.JSDocTypeReference) ? SymbolFlags.Type : SymbolFlags.Namespace;
-                return resolveEntityName(<EntityName>entityName, meaning, /*ignoreErrors*/ false, /*dontResolveAlias*/true);
+                return resolveEntityName(<EntityName>entityName, meaning, /*ignoreErrors*/ false, /*dontResolveAlias*/ true);
             }
             else if (entityName.parent.kind === SyntaxKind.JsxAttribute) {
                 return getJsxAttributePropertySymbol(<JsxAttribute>entityName.parent);
@@ -18361,12 +22493,13 @@ namespace ts {
             if (node.kind === SyntaxKind.SourceFile) {
                 return isExternalModule(<SourceFile>node) ? getMergedSymbol(node.symbol) : undefined;
             }
+
             if (isInsideWithStatementBody(node)) {
                 // We cannot answer semantic questions within a with block, do not proceed any further
                 return undefined;
             }
 
-            if (isDeclarationName(node)) {
+            if (isDeclarationNameOrImportPropertyName(node)) {
                 // This is a declaration, call getSymbolOfNode
                 return getSymbolOfNode(node.parent);
             }
@@ -18404,10 +22537,10 @@ namespace ts {
                             return sig.thisParameter;
                         }
                     }
-                    // fallthrough
+                    // falls through
 
                 case SyntaxKind.SuperKeyword:
-                    const type = isPartOfExpression(node) ? checkExpression(<Expression>node) : getTypeFromTypeNode(<TypeNode>node);
+                    const type = isPartOfExpression(node) ? getTypeOfExpression(<Expression>node) : getTypeFromTypeNode(<TypeNode>node);
                     return type.symbol;
 
                 case SyntaxKind.ThisType:
@@ -18422,19 +22555,20 @@ namespace ts {
                     return undefined;
 
                 case SyntaxKind.StringLiteral:
-                    // External module name in an import declaration
-                    if ((isExternalModuleImportEqualsDeclaration(node.parent.parent) &&
-                        getExternalModuleImportEqualsDeclarationExpression(node.parent.parent) === node) ||
-                        ((node.parent.kind === SyntaxKind.ImportDeclaration || node.parent.kind === SyntaxKind.ExportDeclaration) &&
-                            (<ImportDeclaration>node.parent).moduleSpecifier === node)) {
+                    // 1). import x = require("./mo/*gotToDefinitionHere*/d")
+                    // 2). External module name in an import declaration
+                    // 3). Dynamic import call or require in javascript
+                    if ((isExternalModuleImportEqualsDeclaration(node.parent.parent) && getExternalModuleImportEqualsDeclarationExpression(node.parent.parent) === node) ||
+                        ((node.parent.kind === SyntaxKind.ImportDeclaration || node.parent.kind === SyntaxKind.ExportDeclaration) && (<ImportDeclaration>node.parent).moduleSpecifier === node) ||
+                        ((isInJavaScriptFile(node) && isRequireCall(node.parent, /*checkArgumentIsStringLiteral*/ false)) || isImportCall(node.parent))) {
                         return resolveExternalModuleName(node, <LiteralExpression>node);
                     }
-                // Fall through
+                    // falls through
 
                 case SyntaxKind.NumericLiteral:
                     // index access
                     if (node.parent.kind === SyntaxKind.ElementAccessExpression && (<ElementAccessExpression>node.parent).argumentExpression === node) {
-                        const objectType = checkExpression((<ElementAccessExpression>node.parent).expression);
+                        const objectType = getTypeOfExpression((<ElementAccessExpression>node.parent).expression);
                         if (objectType === unknownType) return undefined;
                         const apparentType = getApparentType(objectType);
                         if (apparentType === unknownType) return undefined;
@@ -18469,17 +22603,28 @@ namespace ts {
             }
 
             if (isPartOfTypeNode(node)) {
-                return getTypeFromTypeNode(<TypeNode>node);
+                let typeFromTypeNode = getTypeFromTypeNode(<TypeNode>node);
+
+                if (typeFromTypeNode && isExpressionWithTypeArgumentsInClassImplementsClause(node)) {
+                    const containingClass = getContainingClass(node);
+                    const classType = getTypeOfNode(containingClass) as InterfaceType;
+                    typeFromTypeNode = getTypeWithThisArgument(typeFromTypeNode, classType.thisType);
+                }
+
+                return typeFromTypeNode;
             }
 
             if (isPartOfExpression(node)) {
-                return getTypeOfExpression(<Expression>node);
+                return getRegularTypeOfExpression(<Expression>node);
             }
 
             if (isExpressionWithTypeArgumentsInClassExtendsClause(node)) {
                 // A SyntaxKind.ExpressionWithTypeArguments is considered a type node, except when it occurs in the
                 // extends clause of a class. We handle that case here.
-                return getBaseTypes(<InterfaceType>getDeclaredTypeOfSymbol(getSymbolOfNode(node.parent.parent)))[0];
+                const classNode = getContainingClass(node);
+                const classType = getDeclaredTypeOfSymbol(getSymbolOfNode(classNode)) as InterfaceType;
+                const baseType = getBaseTypes(classType)[0];
+                return baseType && getTypeWithThisArgument(baseType, classType.thisType);
             }
 
             if (isTypeDeclaration(node)) {
@@ -18499,7 +22644,7 @@ namespace ts {
                 return getTypeOfSymbol(symbol);
             }
 
-            if (isDeclarationName(node)) {
+            if (isDeclarationNameOrImportPropertyName(node)) {
                 const symbol = getSymbolAtLocation(node);
                 return symbol && getTypeOfSymbol(symbol);
             }
@@ -18529,13 +22674,13 @@ namespace ts {
             //     for ( { a } of elems) {
             //     }
             if (expr.parent.kind === SyntaxKind.ForOfStatement) {
-                const iteratedType = checkRightHandSideOfForOf((<ForOfStatement>expr.parent).expression);
+                const iteratedType = checkRightHandSideOfForOf((<ForOfStatement>expr.parent).expression, (<ForOfStatement>expr.parent).awaitModifier);
                 return checkDestructuringAssignment(expr, iteratedType || unknownType);
             }
             // If this is from "for" initializer
             //     for ({a } = elems[0];.....) { }
             if (expr.parent.kind === SyntaxKind.BinaryExpression) {
-                const iteratedType = checkExpression((<BinaryExpression>expr.parent).right);
+                const iteratedType = getTypeOfExpression((<BinaryExpression>expr.parent).right);
                 return checkDestructuringAssignment(expr, iteratedType || unknownType);
             }
             // If this is from nested object binding pattern
@@ -18548,7 +22693,7 @@ namespace ts {
             Debug.assert(expr.parent.kind === SyntaxKind.ArrayLiteralExpression);
             //    [{ property1: p1, property2 }] = elems;
             const typeOfArrayLiteral = getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(<Expression>expr.parent);
-            const elementType = checkIteratedTypeOrElementType(typeOfArrayLiteral || unknownType, expr.parent, /*allowStringInput*/ false) || unknownType;
+            const elementType = checkIteratedTypeOrElementType(typeOfArrayLiteral || unknownType, expr.parent, /*allowStringInput*/ false, /*allowAsyncIterables*/ false) || unknownType;
             return checkArrayLiteralDestructuringElementAssignment(<ArrayLiteralExpression>expr.parent, typeOfArrayLiteral,
                 indexOf((<ArrayLiteralExpression>expr.parent).elements, expr), elementType || unknownType);
         }
@@ -18565,17 +22710,17 @@ namespace ts {
             return typeOfObjectLiteral && getPropertyOfType(typeOfObjectLiteral, location.text);
         }
 
-        function getTypeOfExpression(expr: Expression): Type {
+        function getRegularTypeOfExpression(expr: Expression): Type {
             if (isRightSideOfQualifiedNameOrPropertyAccess(expr)) {
                 expr = <Expression>expr.parent;
             }
-            return getRegularTypeOfLiteralType(checkExpression(expr));
+            return getRegularTypeOfLiteralType(getTypeOfExpression(expr));
         }
 
         /**
-          * Gets either the static or instance type of a class element, based on
-          * whether the element is declared as "static".
-          */
+         * Gets either the static or instance type of a class element, based on
+         * whether the element is declared as "static".
+         */
         function getParentTypeOfClassElement(node: ClassElement) {
             const classSymbol = getSymbolOfNode(node.parent);
             return getModifierFlags(node) & ModifierFlags.Static
@@ -18590,8 +22735,8 @@ namespace ts {
             const propsByName = createSymbolTable(getPropertiesOfType(type));
             if (getSignaturesOfType(type, SignatureKind.Call).length || getSignaturesOfType(type, SignatureKind.Construct).length) {
                 forEach(getPropertiesOfType(globalFunctionType), p => {
-                    if (!propsByName[p.name]) {
-                        propsByName[p.name] = p;
+                    if (!propsByName.has(p.name)) {
+                        propsByName.set(p.name, p);
                     }
                 });
             }
@@ -18599,7 +22744,7 @@ namespace ts {
         }
 
         function getRootSymbols(symbol: Symbol): Symbol[] {
-            if (symbol.flags & SymbolFlags.SyntheticProperty) {
+            if (getCheckFlags(symbol) & CheckFlags.Synthetic) {
                 const symbols: Symbol[] = [];
                 const name = symbol.name;
                 forEach(getSymbolLinks(symbol).containingType.types, t => {
@@ -18611,6 +22756,14 @@ namespace ts {
                 return symbols;
             }
             else if (symbol.flags & SymbolFlags.Transient) {
+                const transient = symbol as TransientSymbol;
+                if (transient.leftSpread) {
+                    return [...getRootSymbols(transient.leftSpread), ...getRootSymbols(transient.rightSpread)];
+                }
+                if (transient.syntheticOrigin) {
+                    return getRootSymbols(transient.syntheticOrigin);
+                }
+
                 let target: Symbol;
                 let next = symbol;
                 while (next = getSymbolLinks(next).target) {
@@ -18629,7 +22782,8 @@ namespace ts {
             if (!isGeneratedIdentifier(node)) {
                 node = getParseTreeNode(node, isIdentifier);
                 if (node) {
-                    return getReferencedValueSymbol(node) === argumentsSymbol;
+                    const isPropertyName = node.parent.kind === SyntaxKind.PropertyAccessExpression && (<PropertyAccessExpression>node.parent).name === node;
+                    return !isPropertyName && getReferencedValueSymbol(node) === argumentsSymbol;
                 }
             }
 
@@ -18654,7 +22808,7 @@ namespace ts {
                 // otherwise - check if at least one export is value
                 symbolLinks.exportsSomeValue = hasExportAssignment
                     ? !!(moduleSymbol.flags & SymbolFlags.Value)
-                    : forEachProperty(getExportsOfModule(moduleSymbol), isValue);
+                    : forEachEntry(getExportsOfModule(moduleSymbol), isValue);
             }
 
             return symbolLinks.exportsSomeValue;
@@ -18667,7 +22821,7 @@ namespace ts {
 
         function isNameOfModuleOrEnumDeclaration(node: Identifier) {
             const parent = node.parent;
-            return isModuleOrEnumDeclaration(parent) && node === parent.name;
+            return parent && isModuleOrEnumDeclaration(parent) && node === parent.name;
         }
 
         // When resolved as an expression identifier, if the given node references an exported entity, return the declaration
@@ -18700,11 +22854,7 @@ namespace ts {
                             const symbolIsUmdExport = symbolFile !== referenceFile;
                             return symbolIsUmdExport ? undefined : symbolFile;
                         }
-                        for (let n = node.parent; n; n = n.parent) {
-                            if (isModuleOrEnumDeclaration(n) && getSymbolOfNode(n) === parentSymbol) {
-                                return <ModuleDeclaration | EnumDeclaration>n;
-                            }
-                        }
+                        return findAncestor(node.parent, (n): n is ModuleDeclaration | EnumDeclaration => isModuleOrEnumDeclaration(n) && getSymbolOfNode(n) === parentSymbol);
                     }
                 }
             }
@@ -18716,7 +22866,9 @@ namespace ts {
             node = getParseTreeNode(node, isIdentifier);
             if (node) {
                 const symbol = getReferencedValueSymbol(node);
-                if (symbol && symbol.flags & SymbolFlags.Alias) {
+                // We should only get the declaration of an alias if there isn't a local value
+                // declaration for the symbol
+                if (isNonLocalAlias(symbol, /*excludes*/ SymbolFlags.Value)) {
                     return getDeclarationOfAliasSymbol(symbol);
                 }
             }
@@ -18799,12 +22951,6 @@ namespace ts {
         }
 
         function isValueAliasDeclaration(node: Node): boolean {
-            node = getParseTreeNode(node);
-            if (node === undefined) {
-                // A synthesized node comes from an emit transformation and is always a value.
-                return true;
-            }
-
             switch (node.kind) {
                 case SyntaxKind.ImportEqualsDeclaration:
                 case SyntaxKind.ImportClause:
@@ -18851,12 +22997,6 @@ namespace ts {
         }
 
         function isReferencedAliasDeclaration(node: Node, checkChildren?: boolean): boolean {
-            node = getParseTreeNode(node);
-            // Purely synthesized nodes are always emitted.
-            if (node === undefined) {
-                return true;
-            }
-
             if (isAliasSymbolDeclaration(node)) {
                 const symbol = getSymbolOfNode(node);
                 if (symbol && getSymbolLinks(symbol).referenced) {
@@ -18891,17 +23031,40 @@ namespace ts {
             return false;
         }
 
+        function isRequiredInitializedParameter(parameter: ParameterDeclaration) {
+            return strictNullChecks &&
+                !isOptionalParameter(parameter) &&
+                parameter.initializer &&
+                !(getModifierFlags(parameter) & ModifierFlags.ParameterPropertyModifier);
+        }
+
+        function isOptionalUninitializedParameterProperty(parameter: ParameterDeclaration) {
+            return strictNullChecks &&
+                isOptionalParameter(parameter) &&
+                !parameter.initializer &&
+                !!(getModifierFlags(parameter) & ModifierFlags.ParameterPropertyModifier);
+        }
+
         function getNodeCheckFlags(node: Node): NodeCheckFlags {
-            node = getParseTreeNode(node);
-            return node ? getNodeLinks(node).flags : undefined;
+            return getNodeLinks(node).flags;
         }
 
-        function getEnumMemberValue(node: EnumMember): number {
+        function getEnumMemberValue(node: EnumMember): string | number {
             computeEnumMemberValues(<EnumDeclaration>node.parent);
             return getNodeLinks(node).enumMemberValue;
         }
 
-        function getConstantValue(node: EnumMember | PropertyAccessExpression | ElementAccessExpression): number {
+        function canHaveConstantValue(node: Node): node is EnumMember | PropertyAccessExpression | ElementAccessExpression {
+            switch (node.kind) {
+                case SyntaxKind.EnumMember:
+                case SyntaxKind.PropertyAccessExpression:
+                case SyntaxKind.ElementAccessExpression:
+                    return true;
+            }
+            return false;
+        }
+
+        function getConstantValue(node: EnumMember | PropertyAccessExpression | ElementAccessExpression): string | number {
             if (node.kind === SyntaxKind.EnumMember) {
                 return getEnumMemberValue(<EnumMember>node);
             }
@@ -18918,24 +23081,27 @@ namespace ts {
         }
 
         function isFunctionType(type: Type): boolean {
-            return type.flags & TypeFlags.ObjectType && getSignaturesOfType(type, SignatureKind.Call).length > 0;
+            return type.flags & TypeFlags.Object && getSignaturesOfType(type, SignatureKind.Call).length > 0;
         }
 
         function getTypeReferenceSerializationKind(typeName: EntityName, location?: Node): TypeReferenceSerializationKind {
             // Resolve the symbol as a value to ensure the type can be reached at runtime during emit.
             const valueSymbol = resolveEntityName(typeName, SymbolFlags.Value, /*ignoreErrors*/ true, /*dontResolveAlias*/ false, location);
-            const globalPromiseSymbol = tryGetGlobalPromiseConstructorSymbol();
-            if (globalPromiseSymbol && valueSymbol === globalPromiseSymbol) {
-                return TypeReferenceSerializationKind.Promise;
-            }
-
-            const constructorType = valueSymbol ? getTypeOfSymbol(valueSymbol) : undefined;
-            if (constructorType && isConstructorType(constructorType)) {
-                return TypeReferenceSerializationKind.TypeWithConstructSignatureAndValue;
-            }
 
             // Resolve the symbol as a type so that we can provide a more useful hint for the type serializer.
             const typeSymbol = resolveEntityName(typeName, SymbolFlags.Type, /*ignoreErrors*/ true, /*dontResolveAlias*/ false, location);
+            if (valueSymbol && valueSymbol === typeSymbol) {
+                const globalPromiseSymbol = getGlobalPromiseConstructorSymbol(/*reportErrors*/ false);
+                if (globalPromiseSymbol && valueSymbol === globalPromiseSymbol) {
+                    return TypeReferenceSerializationKind.Promise;
+                }
+
+                const constructorType = getTypeOfSymbol(valueSymbol);
+                if (constructorType && isConstructorType(constructorType)) {
+                    return TypeReferenceSerializationKind.TypeWithConstructSignatureAndValue;
+                }
+            }
+
             // We might not be able to resolve type symbol so use unknown type in that case (eg error case)
             if (!typeSymbol) {
                 return TypeReferenceSerializationKind.ObjectType;
@@ -18979,10 +23145,12 @@ namespace ts {
         function writeTypeOfDeclaration(declaration: AccessorDeclaration | VariableLikeDeclaration, enclosingDeclaration: Node, flags: TypeFormatFlags, writer: SymbolWriter) {
             // Get type of the symbol if this is the valid symbol otherwise get type at location
             const symbol = getSymbolOfNode(declaration);
-            const type = symbol && !(symbol.flags & (SymbolFlags.TypeLiteral | SymbolFlags.Signature))
+            let type = symbol && !(symbol.flags & (SymbolFlags.TypeLiteral | SymbolFlags.Signature))
                 ? getWidenedLiteralType(getTypeOfSymbol(symbol))
                 : unknownType;
-
+            if (flags & TypeFormatFlags.AddUndefined) {
+                type = getNullableType(type, TypeFlags.Undefined);
+            }
             getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
         }
 
@@ -18992,19 +23160,12 @@ namespace ts {
         }
 
         function writeTypeOfExpression(expr: Expression, enclosingDeclaration: Node, flags: TypeFormatFlags, writer: SymbolWriter) {
-            const type = getWidenedType(getTypeOfExpression(expr));
+            const type = getWidenedType(getRegularTypeOfExpression(expr));
             getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
         }
 
-        function writeBaseConstructorTypeOfClass(node: ClassLikeDeclaration, enclosingDeclaration: Node, flags: TypeFormatFlags, writer: SymbolWriter) {
-            const classType = <InterfaceType>getDeclaredTypeOfSymbol(getSymbolOfNode(node));
-            resolveBaseTypesOfClass(classType);
-            const baseType = classType.resolvedBaseTypes.length ? classType.resolvedBaseTypes[0] : unknownType;
-            getSymbolDisplayBuilder().buildTypeDisplay(baseType, writer, enclosingDeclaration, flags);
-        }
-
         function hasGlobalName(name: string): boolean {
-            return !!globals[name];
+            return globals.has(name);
         }
 
         function getReferencedValueSymbol(reference: Identifier, startInDeclarationContainer?: boolean): Symbol {
@@ -19040,7 +23201,7 @@ namespace ts {
             return undefined;
         }
 
-        function isLiteralConstDeclaration(node: VariableDeclaration): boolean {
+        function isLiteralConstDeclaration(node: VariableDeclaration | PropertyDeclaration | PropertySignature | ParameterDeclaration): boolean {
             if (isConst(node)) {
                 const type = getTypeOfSymbol(getSymbolOfNode(node));
                 return !!(type.flags & TypeFlags.StringOrNumberLiteral && type.flags & TypeFlags.FreshLiteral);
@@ -19048,7 +23209,7 @@ namespace ts {
             return false;
         }
 
-        function writeLiteralConstValue(node: VariableDeclaration, writer: SymbolWriter) {
+        function writeLiteralConstValue(node: VariableDeclaration | PropertyDeclaration | PropertySignature | ParameterDeclaration, writer: SymbolWriter) {
             const type = getTypeOfSymbol(getSymbolOfNode(node));
             writer.writeStringLiteral(literalTypeToString(<LiteralType>type));
         }
@@ -19061,34 +23222,48 @@ namespace ts {
             if (resolvedTypeReferenceDirectives) {
                 // populate reverse mapping: file path -> type reference directive that was resolved to this file
                 fileToDirective = createFileMap<string>();
-                for (const key in resolvedTypeReferenceDirectives) {
-                    const resolvedDirective = resolvedTypeReferenceDirectives[key];
+                resolvedTypeReferenceDirectives.forEach((resolvedDirective, key) => {
                     if (!resolvedDirective) {
-                        continue;
+                        return;
                     }
                     const file = host.getSourceFile(resolvedDirective.resolvedFileName);
                     fileToDirective.set(file.path, key);
-                }
+                });
             }
             return {
                 getReferencedExportContainer,
                 getReferencedImportDeclaration,
                 getReferencedDeclarationWithCollidingName,
                 isDeclarationWithCollidingName,
-                isValueAliasDeclaration,
+                isValueAliasDeclaration: node => {
+                    node = getParseTreeNode(node);
+                    // Synthesized nodes are always treated like values.
+                    return node ? isValueAliasDeclaration(node) : true;
+                },
                 hasGlobalName,
-                isReferencedAliasDeclaration,
-                getNodeCheckFlags,
+                isReferencedAliasDeclaration: (node, checkChildren?) => {
+                    node = getParseTreeNode(node);
+                    // Synthesized nodes are always treated as referenced.
+                    return node ? isReferencedAliasDeclaration(node, checkChildren) : true;
+                },
+                getNodeCheckFlags: node => {
+                    node = getParseTreeNode(node);
+                    return node ? getNodeCheckFlags(node) : undefined;
+                },
                 isTopLevelValueImportEqualsWithEntityName,
                 isDeclarationVisible,
                 isImplementationOfOverload,
+                isRequiredInitializedParameter,
+                isOptionalUninitializedParameterProperty,
                 writeTypeOfDeclaration,
                 writeReturnTypeOfSignatureDeclaration,
                 writeTypeOfExpression,
-                writeBaseConstructorTypeOfClass,
                 isSymbolAccessible,
                 isEntityNameVisible,
-                getConstantValue,
+                getConstantValue: node => {
+                    node = getParseTreeNode(node, canHaveConstantValue);
+                    return node ? getConstantValue(node) : undefined;
+                },
                 collectLinkedAliases,
                 getReferencedValueDeclaration,
                 getTypeReferenceSerializationKind,
@@ -19099,7 +23274,8 @@ namespace ts {
                 getTypeReferenceDirectivesForEntityName,
                 getTypeReferenceDirectivesForSymbol,
                 isLiteralConstDeclaration,
-                writeLiteralConstValue
+                writeLiteralConstValue,
+                getJsxFactoryEntity: () => _jsxFactoryEntity
             };
 
             // defined here to avoid outer scope pollution
@@ -19115,7 +23291,7 @@ namespace ts {
                     ? SymbolFlags.Value | SymbolFlags.ExportValue
                     : SymbolFlags.Type | SymbolFlags.Namespace;
 
-                const symbol = resolveEntityName(node, meaning, /*ignoreErrors*/true);
+                const symbol = resolveEntityName(node, meaning, /*ignoreErrors*/ true);
                 return symbol && symbol !== unknownSymbol ? getTypeReferenceDirectivesForSymbol(symbol, meaning) : undefined;
             }
 
@@ -19138,6 +23314,10 @@ namespace ts {
                         if (typeReferenceDirective) {
                             (typeReferenceDirectives || (typeReferenceDirectives = [])).push(typeReferenceDirective);
                         }
+                        else {
+                            // found at least one entry that does not originate from type reference directive
+                            return undefined;
+                        }
                     }
                 }
                 return typeReferenceDirectives;
@@ -19194,8 +23374,6 @@ namespace ts {
 
             // Initialize global symbol table
             let augmentations: LiteralExpression[][];
-            let requestedExternalEmitHelpers: NodeFlags = 0;
-            let firstFileRequestingExternalHelpers: SourceFile;
             for (const file of host.getSourceFiles()) {
                 if (!isExternalOrCommonJsModule(file)) {
                     mergeSymbolTable(globals, file.locals);
@@ -19209,20 +23387,11 @@ namespace ts {
                 if (file.symbol && file.symbol.globalExports) {
                     // Merge in UMD exports with first-in-wins semantics (see #9771)
                     const source = file.symbol.globalExports;
-                    for (const id in source) {
-                        if (!(id in globals)) {
-                            globals[id] = source[id];
-                        }
-                    }
-                }
-                if ((compilerOptions.isolatedModules || isExternalModule(file)) && !file.isDeclarationFile) {
-                    const fileRequestedExternalEmitHelpers = file.flags & NodeFlags.EmitHelperFlags;
-                    if (fileRequestedExternalEmitHelpers) {
-                        requestedExternalEmitHelpers |= fileRequestedExternalEmitHelpers;
-                        if (firstFileRequestingExternalHelpers === undefined) {
-                            firstFileRequestingExternalHelpers = file;
+                    source.forEach((sourceSymbol, id) => {
+                        if (!globals.has(id)) {
+                            globals.set(id, sourceSymbol);
                         }
-                    }
+                    });
                 }
             }
 
@@ -19240,121 +23409,74 @@ namespace ts {
             addToSymbolTable(globals, builtinGlobals, Diagnostics.Declaration_name_conflicts_with_built_in_global_identifier_0);
 
             getSymbolLinks(undefinedSymbol).type = undefinedWideningType;
-            getSymbolLinks(argumentsSymbol).type = getGlobalType("IArguments");
+            getSymbolLinks(argumentsSymbol).type = getGlobalType("IArguments", /*arity*/ 0, /*reportErrors*/ true);
             getSymbolLinks(unknownSymbol).type = unknownType;
 
             // Initialize special types
-            globalArrayType = <GenericType>getGlobalType("Array", /*arity*/ 1);
-            globalObjectType = getGlobalType("Object");
-            globalFunctionType = getGlobalType("Function");
-            globalStringType = getGlobalType("String");
-            globalNumberType = getGlobalType("Number");
-            globalBooleanType = getGlobalType("Boolean");
-            globalRegExpType = getGlobalType("RegExp");
-
-            jsxElementType = getExportedTypeFromNamespace("JSX", JsxNames.Element);
-            getGlobalClassDecoratorType = memoize(() => getGlobalType("ClassDecorator"));
-            getGlobalPropertyDecoratorType = memoize(() => getGlobalType("PropertyDecorator"));
-            getGlobalMethodDecoratorType = memoize(() => getGlobalType("MethodDecorator"));
-            getGlobalParameterDecoratorType = memoize(() => getGlobalType("ParameterDecorator"));
-            getGlobalTypedPropertyDescriptorType = memoize(() => getGlobalType("TypedPropertyDescriptor", /*arity*/ 1));
-            getGlobalESSymbolConstructorSymbol = memoize(() => getGlobalValueSymbol("Symbol"));
-            getGlobalPromiseType = memoize(() => getGlobalType("Promise", /*arity*/ 1));
-            tryGetGlobalPromiseType = memoize(() => getGlobalSymbol("Promise", SymbolFlags.Type, /*diagnostic*/ undefined) && getGlobalPromiseType());
-            getGlobalPromiseLikeType = memoize(() => getGlobalType("PromiseLike", /*arity*/ 1));
-            getInstantiatedGlobalPromiseLikeType = memoize(createInstantiatedPromiseLikeType);
-            getGlobalPromiseConstructorSymbol = memoize(() => getGlobalValueSymbol("Promise"));
-            tryGetGlobalPromiseConstructorSymbol = memoize(() => getGlobalSymbol("Promise", SymbolFlags.Value, /*diagnostic*/ undefined) && getGlobalPromiseConstructorSymbol());
-            getGlobalPromiseConstructorLikeType = memoize(() => getGlobalType("PromiseConstructorLike"));
-            getGlobalThenableType = memoize(createThenableType);
-
-            getGlobalTemplateStringsArrayType = memoize(() => getGlobalType("TemplateStringsArray"));
-
-            if (languageVersion >= ScriptTarget.ES6) {
-                getGlobalESSymbolType = memoize(() => getGlobalType("Symbol"));
-                getGlobalIterableType = memoize(() => <GenericType>getGlobalType("Iterable", /*arity*/ 1));
-                getGlobalIteratorType = memoize(() => <GenericType>getGlobalType("Iterator", /*arity*/ 1));
-                getGlobalIterableIteratorType = memoize(() => <GenericType>getGlobalType("IterableIterator", /*arity*/ 1));
-            }
-            else {
-                getGlobalESSymbolType = memoize(() => emptyObjectType);
-                getGlobalIterableType = memoize(() => emptyGenericType);
-                getGlobalIteratorType = memoize(() => emptyGenericType);
-                getGlobalIterableIteratorType = memoize(() => emptyGenericType);
-            }
-
+            globalArrayType = getGlobalType("Array", /*arity*/ 1, /*reportErrors*/ true);
+            globalObjectType = getGlobalType("Object", /*arity*/ 0, /*reportErrors*/ true);
+            globalFunctionType = getGlobalType("Function", /*arity*/ 0, /*reportErrors*/ true);
+            globalStringType = getGlobalType("String", /*arity*/ 0, /*reportErrors*/ true);
+            globalNumberType = getGlobalType("Number", /*arity*/ 0, /*reportErrors*/ true);
+            globalBooleanType = getGlobalType("Boolean", /*arity*/ 0, /*reportErrors*/ true);
+            globalRegExpType = getGlobalType("RegExp", /*arity*/ 0, /*reportErrors*/ true);
             anyArrayType = createArrayType(anyType);
+            autoArrayType = createArrayType(autoType);
 
-            const symbol = getGlobalSymbol("ReadonlyArray", SymbolFlags.Type, /*diagnostic*/ undefined);
-            globalReadonlyArrayType = symbol && <GenericType>getTypeOfGlobalSymbol(symbol, /*arity*/ 1);
+            globalReadonlyArrayType = <GenericType>getGlobalTypeOrUndefined("ReadonlyArray", /*arity*/ 1);
             anyReadonlyArrayType = globalReadonlyArrayType ? createTypeFromGenericGlobalType(globalReadonlyArrayType, [anyType]) : anyArrayType;
-
-            // If we have specified that we are importing helpers, we should report global
-            // errors if we cannot resolve the helpers external module, or if it does not have
-            // the necessary helpers exported.
-            if (compilerOptions.importHelpers && firstFileRequestingExternalHelpers) {
-                // Find the first reference to the helpers module.
-                const helpersModule = resolveExternalModule(
-                    firstFileRequestingExternalHelpers,
-                    externalHelpersModuleNameText,
-                    Diagnostics.Cannot_find_module_0,
-                    /*errorNode*/ undefined);
-
-                // If we found the module, report errors if it does not have the necessary exports.
-                if (helpersModule) {
-                    const exports = helpersModule.exports;
-                    if (requestedExternalEmitHelpers & NodeFlags.HasClassExtends && languageVersion < ScriptTarget.ES6) {
-                        verifyHelperSymbol(exports, "__extends", SymbolFlags.Value);
-                    }
-                    if (requestedExternalEmitHelpers & NodeFlags.HasJsxSpreadAttributes && compilerOptions.jsx !== JsxEmit.Preserve) {
-                        verifyHelperSymbol(exports, "__assign", SymbolFlags.Value);
-                    }
-                    if (requestedExternalEmitHelpers & NodeFlags.HasDecorators) {
-                        verifyHelperSymbol(exports, "__decorate", SymbolFlags.Value);
-                        if (compilerOptions.emitDecoratorMetadata) {
-                            verifyHelperSymbol(exports, "__metadata", SymbolFlags.Value);
-                        }
-                    }
-                    if (requestedExternalEmitHelpers & NodeFlags.HasParamDecorators) {
-                        verifyHelperSymbol(exports, "__param", SymbolFlags.Value);
-                    }
-                    if (requestedExternalEmitHelpers & NodeFlags.HasAsyncFunctions) {
-                        verifyHelperSymbol(exports, "__awaiter", SymbolFlags.Value);
-                        if (languageVersion < ScriptTarget.ES6) {
-                            verifyHelperSymbol(exports, "__generator", SymbolFlags.Value);
+            globalThisType = <GenericType>getGlobalTypeOrUndefined("ThisType", /*arity*/ 1);
+        }
+
+        function checkExternalEmitHelpers(location: Node, helpers: ExternalEmitHelpers) {
+            if ((requestedExternalEmitHelpers & helpers) !== helpers && compilerOptions.importHelpers) {
+                const sourceFile = getSourceFileOfNode(location);
+                if (isEffectiveExternalModule(sourceFile, compilerOptions) && !isInAmbientContext(location)) {
+                    const helpersModule = resolveHelpersModule(sourceFile, location);
+                    if (helpersModule !== unknownSymbol) {
+                        const uncheckedHelpers = helpers & ~requestedExternalEmitHelpers;
+                        for (let helper = ExternalEmitHelpers.FirstEmitHelper; helper <= ExternalEmitHelpers.LastEmitHelper; helper <<= 1) {
+                            if (uncheckedHelpers & helper) {
+                                const name = getHelperName(helper);
+                                const symbol = getSymbol(helpersModule.exports, escapeIdentifier(name), SymbolFlags.Value);
+                                if (!symbol) {
+                                    error(location, Diagnostics.This_syntax_requires_an_imported_helper_named_1_but_module_0_has_no_exported_member_1, externalHelpersModuleNameText, name);
+                                }
+                            }
                         }
                     }
+                    requestedExternalEmitHelpers |= helpers;
                 }
             }
         }
 
-        function verifyHelperSymbol(symbols: SymbolTable, name: string, meaning: SymbolFlags) {
-            const symbol = getSymbol(symbols, escapeIdentifier(name), meaning);
-            if (!symbol) {
-                error(/*location*/ undefined, Diagnostics.Module_0_has_no_exported_member_1, externalHelpersModuleNameText, name);
+        function getHelperName(helper: ExternalEmitHelpers) {
+            switch (helper) {
+                case ExternalEmitHelpers.Extends: return "__extends";
+                case ExternalEmitHelpers.Assign: return "__assign";
+                case ExternalEmitHelpers.Rest: return "__rest";
+                case ExternalEmitHelpers.Decorate: return "__decorate";
+                case ExternalEmitHelpers.Metadata: return "__metadata";
+                case ExternalEmitHelpers.Param: return "__param";
+                case ExternalEmitHelpers.Awaiter: return "__awaiter";
+                case ExternalEmitHelpers.Generator: return "__generator";
+                case ExternalEmitHelpers.Values: return "__values";
+                case ExternalEmitHelpers.Read: return "__read";
+                case ExternalEmitHelpers.Spread: return "__spread";
+                case ExternalEmitHelpers.Await: return "__await";
+                case ExternalEmitHelpers.AsyncGenerator: return "__asyncGenerator";
+                case ExternalEmitHelpers.AsyncDelegator: return "__asyncDelegator";
+                case ExternalEmitHelpers.AsyncValues: return "__asyncValues";
+                case ExternalEmitHelpers.ExportStar: return "__exportStar";
+                default: Debug.fail("Unrecognized helper");
             }
         }
 
-        function createInstantiatedPromiseLikeType(): ObjectType {
-            const promiseLikeType = getGlobalPromiseLikeType();
-            if (promiseLikeType !== emptyGenericType) {
-                return createTypeReference(<GenericType>promiseLikeType, [anyType]);
+        function resolveHelpersModule(node: SourceFile, errorNode: Node) {
+            if (!externalHelpersModule) {
+                externalHelpersModule = resolveExternalModule(node, externalHelpersModuleNameText, Diagnostics.This_syntax_requires_an_imported_helper_but_module_0_cannot_be_found, errorNode) || unknownSymbol;
             }
-
-            return emptyObjectType;
-        }
-
-        function createThenableType() {
-            // build the thenable type that is used to verify against a non-promise "thenable" operand to `await`.
-            const thenPropertySymbol = createSymbol(SymbolFlags.Transient | SymbolFlags.Property, "then");
-            getSymbolLinks(thenPropertySymbol).type = globalFunctionType;
-
-            const thenableType = <ResolvedType>createObjectType(TypeFlags.Anonymous);
-            thenableType.properties = [thenPropertySymbol];
-            thenableType.members = createSymbolTable(thenableType.properties);
-            thenableType.callSignatures = [];
-            thenableType.constructSignatures = [];
-            return thenableType;
+            return externalHelpersModule;
         }
 
         // GRAMMAR CHECKING
@@ -19405,7 +23527,7 @@ namespace ts {
                     case SyntaxKind.PublicKeyword:
                     case SyntaxKind.ProtectedKeyword:
                     case SyntaxKind.PrivateKeyword:
-                        let text = visibilityToString(modifierToFlag(modifier.kind));
+                        const text = visibilityToString(modifierToFlag(modifier.kind));
 
                         if (modifier.kind === SyntaxKind.ProtectedKeyword) {
                             lastProtected = modifier;
@@ -19648,10 +23770,7 @@ namespace ts {
                 case SyntaxKind.FunctionDeclaration:
                 case SyntaxKind.FunctionExpression:
                 case SyntaxKind.ArrowFunction:
-                    if (!(<FunctionLikeDeclaration>node).asteriskToken) {
-                        return false;
-                    }
-                    break;
+                    return false;
             }
 
             return grammarErrorOnNode(asyncModifier, Diagnostics._0_modifier_cannot_be_used_here, "async");
@@ -19666,7 +23785,7 @@ namespace ts {
             }
         }
 
-        function checkGrammarTypeParameterList(node: FunctionLikeDeclaration, typeParameters: NodeArray<TypeParameterDeclaration>, file: SourceFile): boolean {
+        function checkGrammarTypeParameterList(typeParameters: NodeArray<TypeParameterDeclaration>, file: SourceFile): boolean {
             if (checkGrammarForDisallowedTrailingComma(typeParameters)) {
                 return true;
             }
@@ -19717,10 +23836,15 @@ namespace ts {
         function checkGrammarFunctionLikeDeclaration(node: FunctionLikeDeclaration): boolean {
             // Prevent cascading error by short-circuit
             const file = getSourceFileOfNode(node);
-            return checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarTypeParameterList(node, node.typeParameters, file) ||
+            return checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarTypeParameterList(node.typeParameters, file) ||
                 checkGrammarParameterList(node.parameters) || checkGrammarArrowFunction(node, file);
         }
 
+        function checkGrammarClassLikeDeclaration(node: ClassLikeDeclaration): boolean {
+            const file = getSourceFileOfNode(node);
+            return checkGrammarClassDeclarationHeritageClauses(node) || checkGrammarTypeParameterList(node.typeParameters, file);
+        }
+
         function checkGrammarArrowFunction(node: FunctionLikeDeclaration, file: SourceFile): boolean {
             if (node.kind === SyntaxKind.ArrowFunction) {
                 const arrowFunction = <ArrowFunction>node;
@@ -19785,7 +23909,7 @@ namespace ts {
                 checkGrammarForAtLeastOneTypeArgument(node, typeArguments);
         }
 
-        function checkGrammarForOmittedArgument(node: CallExpression, args: NodeArray<Expression>): boolean {
+        function checkGrammarForOmittedArgument(node: CallExpression | NewExpression, args: NodeArray<Expression>): boolean {
             if (args) {
                 const sourceFile = getSourceFileOfNode(node);
                 for (const arg of args) {
@@ -19796,7 +23920,7 @@ namespace ts {
             }
         }
 
-        function checkGrammarArguments(node: CallExpression, args: NodeArray<Expression>): boolean {
+        function checkGrammarArguments(node: CallExpression | NewExpression, args: NodeArray<Expression>): boolean {
             return checkGrammarForOmittedArgument(node, args);
         }
 
@@ -19810,6 +23934,11 @@ namespace ts {
                 const sourceFile = getSourceFileOfNode(node);
                 return grammarErrorAtPos(sourceFile, types.pos, 0, Diagnostics._0_list_cannot_be_empty, listType);
             }
+            return forEach(types, checkGrammarExpressionWithTypeArguments);
+        }
+
+        function checkGrammarExpressionWithTypeArguments(node: ExpressionWithTypeArguments) {
+            return checkGrammarTypeArguments(node, node.typeArguments);
         }
 
         function checkGrammarClassDeclarationHeritageClauses(node: ClassLikeDeclaration) {
@@ -19869,7 +23998,6 @@ namespace ts {
                     checkGrammarHeritageClause(heritageClause);
                 }
             }
-
             return false;
         }
 
@@ -19897,13 +24025,10 @@ namespace ts {
                 if (!node.body) {
                     return grammarErrorOnNode(node.asteriskToken, Diagnostics.An_overload_signature_cannot_be_declared_as_a_generator);
                 }
-                if (languageVersion < ScriptTarget.ES6) {
-                    return grammarErrorOnNode(node.asteriskToken, Diagnostics.Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher);
-                }
             }
         }
 
-        function checkGrammarForInvalidQuestionMark(node: Declaration, questionToken: Node, message: DiagnosticMessage): boolean {
+        function checkGrammarForInvalidQuestionMark(questionToken: Node, message: DiagnosticMessage): boolean {
             if (questionToken) {
                 return grammarErrorOnNode(questionToken, message);
             }
@@ -19917,9 +24042,11 @@ namespace ts {
             const GetOrSetAccessor = GetAccessor | SetAccessor;
 
             for (const prop of node.properties) {
+                if (prop.kind === SyntaxKind.SpreadAssignment) {
+                    continue;
+                }
                 const name = prop.name;
-                if (prop.kind === SyntaxKind.OmittedExpression ||
-                    name.kind === SyntaxKind.ComputedPropertyName) {
+                if (name.kind === SyntaxKind.ComputedPropertyName) {
                     // If the name is not a ComputedPropertyName, the grammar checking will skip it
                     checkGrammarComputedPropertyName(<ComputedPropertyName>name);
                 }
@@ -19950,7 +24077,7 @@ namespace ts {
                 let currentKind: number;
                 if (prop.kind === SyntaxKind.PropertyAssignment || prop.kind === SyntaxKind.ShorthandPropertyAssignment) {
                     // Grammar checking for computedPropertyName and shorthandPropertyAssignment
-                    checkGrammarForInvalidQuestionMark(prop, (<PropertyAssignment>prop).questionToken, Diagnostics.An_object_member_cannot_be_declared_optional);
+                    checkGrammarForInvalidQuestionMark((<PropertyAssignment>prop).questionToken, Diagnostics.An_object_member_cannot_be_declared_optional);
                     if (name.kind === SyntaxKind.NumericLiteral) {
                         checkGrammarNumericLiteral(<NumericLiteral>name);
                     }
@@ -19966,7 +24093,7 @@ namespace ts {
                     currentKind = SetAccessor;
                 }
                 else {
-                    Debug.fail("Unexpected syntax kind:" + prop.kind);
+                    Debug.fail("Unexpected syntax kind:" + (<Node>prop).kind);
                 }
 
                 const effectiveName = getPropertyNameForPropertyNameNode(name);
@@ -19974,17 +24101,17 @@ namespace ts {
                     continue;
                 }
 
-                if (!seen[effectiveName]) {
-                    seen[effectiveName] = currentKind;
+                const existingKind = seen.get(effectiveName);
+                if (!existingKind) {
+                    seen.set(effectiveName, currentKind);
                 }
                 else {
-                    const existingKind = seen[effectiveName];
                     if (currentKind === Property && existingKind === Property) {
                         grammarErrorOnNode(name, Diagnostics.Duplicate_identifier_0, getTextOfNode(name));
                     }
                     else if ((currentKind & GetOrSetAccessor) && (existingKind & GetOrSetAccessor)) {
                         if (existingKind !== GetOrSetAccessor && currentKind !== existingKind) {
-                            seen[effectiveName] = currentKind | existingKind;
+                            seen.set(effectiveName, currentKind | existingKind);
                         }
                         else {
                             return grammarErrorOnNode(name, Diagnostics.An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name);
@@ -19999,15 +24126,16 @@ namespace ts {
 
         function checkGrammarJsxElement(node: JsxOpeningLikeElement) {
             const seen = createMap<boolean>();
-            for (const attr of node.attributes) {
+
+            for (const attr of node.attributes.properties) {
                 if (attr.kind === SyntaxKind.JsxSpreadAttribute) {
                     continue;
                 }
 
                 const jsxAttr = (<JsxAttribute>attr);
                 const name = jsxAttr.name;
-                if (!seen[name.text]) {
-                    seen[name.text] = true;
+                if (!seen.get(name.text)) {
+                    seen.set(name.text, true);
                 }
                 else {
                     return grammarErrorOnNode(name, Diagnostics.JSX_elements_cannot_have_multiple_attributes_with_the_same_name);
@@ -20020,11 +24148,17 @@ namespace ts {
             }
         }
 
-        function checkGrammarForInOrForOfStatement(forInOrOfStatement: ForInStatement | ForOfStatement): boolean {
+        function checkGrammarForInOrForOfStatement(forInOrOfStatement: ForInOrOfStatement): boolean {
             if (checkGrammarStatementInAmbientContext(forInOrOfStatement)) {
                 return true;
             }
 
+            if (forInOrOfStatement.kind === SyntaxKind.ForOfStatement && forInOrOfStatement.awaitModifier) {
+                if ((forInOrOfStatement.flags & NodeFlags.AwaitContext) === NodeFlags.None) {
+                    return grammarErrorOnNode(forInOrOfStatement.awaitModifier, Diagnostics.A_for_await_of_statement_is_only_allowed_within_an_async_function_or_async_generator);
+                }
+            }
+
             if (forInOrOfStatement.initializer.kind === SyntaxKind.VariableDeclarationList) {
                 const variableList = <VariableDeclarationList>forInOrOfStatement.initializer;
                 if (!checkGrammarVariableDeclarationList(variableList)) {
@@ -20078,6 +24212,9 @@ namespace ts {
             else if (accessor.body === undefined && !(getModifierFlags(accessor) & ModifierFlags.Abstract)) {
                 return grammarErrorAtPos(getSourceFileOfNode(accessor), accessor.end - 1, ";".length, Diagnostics._0_expected, "{");
             }
+            else if (accessor.body && getModifierFlags(accessor) & ModifierFlags.Abstract) {
+                return grammarErrorOnNode(accessor, Diagnostics.An_abstract_accessor_cannot_have_an_implementation);
+            }
             else if (accessor.typeParameters) {
                 return grammarErrorOnNode(accessor.name, Diagnostics.An_accessor_cannot_have_type_parameters);
             }
@@ -20107,26 +24244,16 @@ namespace ts {
         }
 
         /** Does the accessor have the right number of parameters?
-
-            A get accessor has no parameters or a single `this` parameter.
-            A set accessor has one parameter or a `this` parameter and one more parameter */
+         * A get accessor has no parameters or a single `this` parameter.
+         * A set accessor has one parameter or a `this` parameter and one more parameter.
+         */
         function doesAccessorHaveCorrectParameterCount(accessor: AccessorDeclaration) {
             return getAccessorThisParameter(accessor) || accessor.parameters.length === (accessor.kind === SyntaxKind.GetAccessor ? 0 : 1);
         }
 
         function getAccessorThisParameter(accessor: AccessorDeclaration): ParameterDeclaration {
-            if (accessor.parameters.length === (accessor.kind === SyntaxKind.GetAccessor ? 1 : 2) &&
-                accessor.parameters[0].name.kind === SyntaxKind.Identifier &&
-                (<Identifier>accessor.parameters[0].name).originalKeywordKind === SyntaxKind.ThisKeyword) {
-                return accessor.parameters[0];
-            }
-        }
-
-        function getFunctionLikeThisParameter(func: FunctionLikeDeclaration) {
-            if (func.parameters.length &&
-                func.parameters[0].name.kind === SyntaxKind.Identifier &&
-                (<Identifier>func.parameters[0].name).originalKeywordKind === SyntaxKind.ThisKeyword) {
-                return func.parameters[0];
+            if (accessor.parameters.length === (accessor.kind === SyntaxKind.GetAccessor ? 1 : 2)) {
+                return getThisParameter(accessor);
             }
         }
 
@@ -20144,7 +24271,7 @@ namespace ts {
             }
 
             if (node.parent.kind === SyntaxKind.ObjectLiteralExpression) {
-                if (checkGrammarForInvalidQuestionMark(node, node.questionToken, Diagnostics.An_object_member_cannot_be_declared_optional)) {
+                if (checkGrammarForInvalidQuestionMark(node.questionToken, Diagnostics.An_object_member_cannot_be_declared_optional)) {
                     return true;
                 }
                 else if (node.body === undefined) {
@@ -20231,7 +24358,7 @@ namespace ts {
             if (node.dotDotDotToken) {
                 const elements = (<BindingPattern>node.parent).elements;
                 if (node !== lastOrUndefined(elements)) {
-                    return grammarErrorOnNode(node, Diagnostics.A_rest_element_must_be_last_in_an_array_destructuring_pattern);
+                    return grammarErrorOnNode(node, Diagnostics.A_rest_element_must_be_last_in_a_destructuring_pattern);
                 }
 
                 if (node.name.kind === SyntaxKind.ArrayBindingPattern || node.name.kind === SyntaxKind.ObjectBindingPattern) {
@@ -20239,7 +24366,7 @@ namespace ts {
                 }
 
                 if (node.initializer) {
-                    // Error on equals token which immediate precedes the initializer
+                    // Error on equals token which immediately precedes the initializer
                     return grammarErrorAtPos(getSourceFileOfNode(node), node.initializer.pos - 1, 1, Diagnostics.A_rest_element_cannot_have_an_initializer);
                 }
             }
@@ -20284,6 +24411,11 @@ namespace ts {
                 }
             }
 
+            if (compilerOptions.module !== ModuleKind.ES2015 && compilerOptions.module !== ModuleKind.System && !compilerOptions.noEmit &&
+                !isInAmbientContext(node.parent.parent) && hasModifier(node.parent.parent, ModifierFlags.Export)) {
+                checkESModuleMarker(node.name);
+            }
+
             const checkLetConstNames = (isLet(node) || isConst(node));
 
             // 1. LexicalDeclaration : LetOrConst BindingList ;
@@ -20296,6 +24428,22 @@ namespace ts {
             return checkLetConstNames && checkGrammarNameInLetOrConstDeclarations(node.name);
         }
 
+        function checkESModuleMarker(name: Identifier | BindingPattern): boolean {
+            if (name.kind === SyntaxKind.Identifier) {
+                if (unescapeIdentifier(name.text) === "__esModule") {
+                    return grammarErrorOnNode(name, Diagnostics.Identifier_expected_esModule_is_reserved_as_an_exported_marker_when_transforming_ECMAScript_modules);
+                }
+            }
+            else {
+                const elements = (<BindingPattern>name).elements;
+                for (const element of elements) {
+                    if (!isOmittedExpression(element)) {
+                        return checkESModuleMarker(element.name);
+                    }
+                }
+            }
+        }
+
         function checkGrammarNameInLetOrConstDeclarations(name: Identifier | BindingPattern): boolean {
             if (name.kind === SyntaxKind.Identifier) {
                 if ((<Identifier>name).originalKeywordKind === SyntaxKind.LetKeyword) {
@@ -20351,6 +24499,14 @@ namespace ts {
             }
         }
 
+        function checkGrammarMetaProperty(node: MetaProperty) {
+            if (node.keywordToken === SyntaxKind.NewKeyword) {
+                if (node.name.text !== "target") {
+                    return grammarErrorOnNode(node.name, Diagnostics._0_is_not_a_valid_meta_property_for_keyword_1_Did_you_mean_2, node.name.text, tokenToString(node.keywordToken), "target");
+                }
+            }
+        }
+
         function hasParseDiagnostics(sourceFile: SourceFile): boolean {
             return sourceFile.parseDiagnostics.length > 0;
         }
@@ -20463,7 +24619,7 @@ namespace ts {
         function checkGrammarStatementInAmbientContext(node: Node): boolean {
             if (isInAmbientContext(node)) {
                 // An accessors is already reported about the ambient context
-                if (isAccessor(node.parent.kind)) {
+                if (isAccessor(node.parent)) {
                     return getNodeLinks(node).hasReportedStatementInAmbientContext = true;
                 }
 
@@ -20495,8 +24651,22 @@ namespace ts {
 
         function checkGrammarNumericLiteral(node: NumericLiteral): boolean {
             // Grammar checking
-            if (node.isOctalLiteral && languageVersion >= ScriptTarget.ES5) {
-                return grammarErrorOnNode(node, Diagnostics.Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher);
+            if (node.numericLiteralFlags & NumericLiteralFlags.Octal) {
+                let diagnosticMessage: DiagnosticMessage | undefined;
+                if (languageVersion >= ScriptTarget.ES5) {
+                    diagnosticMessage = Diagnostics.Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher_Use_the_syntax_0;
+                }
+                else if (isChildOfNodeWithKind(node, SyntaxKind.LiteralType)) {
+                    diagnosticMessage = Diagnostics.Octal_literal_types_must_use_ES2015_syntax_Use_the_syntax_0;
+                }
+                else if (isChildOfNodeWithKind(node, SyntaxKind.EnumMember)) {
+                    diagnosticMessage = Diagnostics.Octal_literals_are_not_allowed_in_enums_members_initializer_Use_the_syntax_0;
+                }
+                if (diagnosticMessage) {
+                    const withMinus = isPrefixUnaryExpression(node.parent) && node.parent.operator === SyntaxKind.MinusToken;
+                    const literal = `${withMinus ? "-" : ""}0o${node.text}`;
+                    return grammarErrorOnNode(withMinus ? node.parent : node, diagnosticMessage, literal);
+                }
             }
         }
 
@@ -20511,12 +24681,44 @@ namespace ts {
 
         function getAmbientModules(): Symbol[] {
             const result: Symbol[] = [];
-            for (const sym in globals) {
+            globals.forEach((global, sym) => {
                 if (ambientModuleSymbolRegex.test(sym)) {
-                    result.push(globals[sym]);
+                    result.push(global);
                 }
-            }
+            });
             return result;
         }
+
+        function checkGrammarImportCallExpression(node: ImportCall): boolean {
+            if (modulekind === ModuleKind.ES2015) {
+                return grammarErrorOnNode(node, Diagnostics.Dynamic_import_cannot_be_used_when_targeting_ECMAScript_2015_modules);
+            }
+
+            if (node.typeArguments) {
+                return grammarErrorOnNode(node, Diagnostics.Dynamic_import_cannot_have_type_arguments);
+            }
+
+            const nodeArguments = node.arguments;
+            if (nodeArguments.length !== 1) {
+                return grammarErrorOnNode(node, Diagnostics.Dynamic_import_must_have_one_specifier_as_an_argument);
+            }
+
+            // see: parseArgumentOrArrayLiteralElement...we use this function which parse arguments of callExpression to parse specifier for dynamic import.
+            // parseArgumentOrArrayLiteralElement allows spread element to be in an argument list which is not allowed as specifier in dynamic import.
+            if (isSpreadElement(nodeArguments[0])) {
+                return grammarErrorOnNode(nodeArguments[0], Diagnostics.Specifier_of_dynamic_import_cannot_be_spread_element);
+            }
+        }
+    }
+
+    /** Like 'isDeclarationName', but returns true for LHS of `import { x as y }` or `export { x as y }`. */
+    function isDeclarationNameOrImportPropertyName(name: Node): boolean {
+        switch (name.parent.kind) {
+            case SyntaxKind.ImportSpecifier:
+            case SyntaxKind.ExportSpecifier:
+                return true;
+            default:
+                return isDeclarationName(name);
+        }
     }
 }
diff --git a/src/compiler/commandLineParser.ts b/src/compiler/commandLineParser.ts
index 648447a..7b50835 100644
--- a/src/compiler/commandLineParser.ts
+++ b/src/compiler/commandLineParser.ts
@@ -2,457 +2,656 @@
 /// <reference path="types.ts"/>
 /// <reference path="core.ts"/>
 /// <reference path="diagnosticInformationMap.generated.ts"/>
-/// <reference path="scanner.ts"/>
+/// <reference path="parser.ts"/>
 
 namespace ts {
     /* @internal */
     export const compileOnSaveCommandLineOption: CommandLineOption = { name: "compileOnSave", type: "boolean" };
     /* @internal */
     export const optionDeclarations: CommandLineOption[] = [
+        // CommandLine only options
         {
-            name: "charset",
-            type: "string",
+            name: "help",
+            shortName: "h",
+            type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: Diagnostics.Command_line_Options,
+            description: Diagnostics.Print_this_message,
         },
-        compileOnSaveCommandLineOption,
         {
-            name: "declaration",
-            shortName: "d",
-            type: "boolean",
-            description: Diagnostics.Generates_corresponding_d_ts_file,
+            name: "help",
+            shortName: "?",
+            type: "boolean"
         },
         {
-            name: "declarationDir",
-            type: "string",
-            isFilePath: true,
-            paramType: Diagnostics.DIRECTORY,
+            name: "all",
+            type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: Diagnostics.Command_line_Options,
+            description: Diagnostics.Show_all_compiler_options,
         },
         {
-            name: "diagnostics",
+            name: "version",
+            shortName: "v",
             type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: Diagnostics.Command_line_Options,
+            description: Diagnostics.Print_the_compiler_s_version,
         },
         {
-            name: "extendedDiagnostics",
+            name: "init",
             type: "boolean",
-            experimental: true
+            showInSimplifiedHelpView: true,
+            category: Diagnostics.Command_line_Options,
+            description: Diagnostics.Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file,
         },
         {
-            name: "emitBOM",
-            type: "boolean"
+            name: "project",
+            shortName: "p",
+            type: "string",
+            isFilePath: true,
+            showInSimplifiedHelpView: true,
+            category: Diagnostics.Command_line_Options,
+            paramType: Diagnostics.FILE_OR_DIRECTORY,
+            description: Diagnostics.Compile_the_project_given_the_path_to_its_configuration_file_or_to_a_folder_with_a_tsconfig_json,
         },
         {
-            name: "help",
-            shortName: "h",
+            name: "pretty",
             type: "boolean",
-            description: Diagnostics.Print_this_message,
+            showInSimplifiedHelpView: true,
+            category: Diagnostics.Command_line_Options,
+            description: Diagnostics.Stylize_errors_and_messages_using_color_and_context_experimental
         },
         {
-            name: "help",
-            shortName: "?",
-            type: "boolean"
+            name: "watch",
+            shortName: "w",
+            type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: Diagnostics.Command_line_Options,
+            description: Diagnostics.Watch_input_files,
+        },
+
+        // Basic
+        {
+            name: "target",
+            shortName: "t",
+            type: createMapFromTemplate({
+                "es3": ScriptTarget.ES3,
+                "es5": ScriptTarget.ES5,
+                "es6": ScriptTarget.ES2015,
+                "es2015": ScriptTarget.ES2015,
+                "es2016": ScriptTarget.ES2016,
+                "es2017": ScriptTarget.ES2017,
+                "esnext": ScriptTarget.ESNext,
+            }),
+            paramType: Diagnostics.VERSION,
+            showInSimplifiedHelpView: true,
+            category: Diagnostics.Basic_Options,
+            description: Diagnostics.Specify_ECMAScript_target_version_Colon_ES3_default_ES5_ES2015_ES2016_ES2017_or_ESNEXT,
         },
         {
-            name: "init",
-            type: "boolean",
-            description: Diagnostics.Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file,
+            name: "module",
+            shortName: "m",
+            type: createMapFromTemplate({
+                "none": ModuleKind.None,
+                "commonjs": ModuleKind.CommonJS,
+                "amd": ModuleKind.AMD,
+                "system": ModuleKind.System,
+                "umd": ModuleKind.UMD,
+                "es6": ModuleKind.ES2015,
+                "es2015": ModuleKind.ES2015,
+                "esnext": ModuleKind.ESNext
+            }),
+            paramType: Diagnostics.KIND,
+            showInSimplifiedHelpView: true,
+            category: Diagnostics.Basic_Options,
+            description: Diagnostics.Specify_module_code_generation_Colon_commonjs_amd_system_umd_es2015_or_ESNext,
         },
         {
-            name: "inlineSourceMap",
+            name: "lib",
+            type: "list",
+            element: {
+                name: "lib",
+                type: createMapFromTemplate({
+                    // JavaScript only
+                    "es5": "lib.es5.d.ts",
+                    "es6": "lib.es2015.d.ts",
+                    "es2015": "lib.es2015.d.ts",
+                    "es7": "lib.es2016.d.ts",
+                    "es2016": "lib.es2016.d.ts",
+                    "es2017": "lib.es2017.d.ts",
+                    "esnext": "lib.esnext.d.ts",
+                    // Host only
+                    "dom": "lib.dom.d.ts",
+                    "dom.iterable": "lib.dom.iterable.d.ts",
+                    "webworker": "lib.webworker.d.ts",
+                    "scripthost": "lib.scripthost.d.ts",
+                    // ES2015 Or ESNext By-feature options
+                    "es2015.core": "lib.es2015.core.d.ts",
+                    "es2015.collection": "lib.es2015.collection.d.ts",
+                    "es2015.generator": "lib.es2015.generator.d.ts",
+                    "es2015.iterable": "lib.es2015.iterable.d.ts",
+                    "es2015.promise": "lib.es2015.promise.d.ts",
+                    "es2015.proxy": "lib.es2015.proxy.d.ts",
+                    "es2015.reflect": "lib.es2015.reflect.d.ts",
+                    "es2015.symbol": "lib.es2015.symbol.d.ts",
+                    "es2015.symbol.wellknown": "lib.es2015.symbol.wellknown.d.ts",
+                    "es2016.array.include": "lib.es2016.array.include.d.ts",
+                    "es2017.object": "lib.es2017.object.d.ts",
+                    "es2017.sharedmemory": "lib.es2017.sharedmemory.d.ts",
+                    "es2017.string": "lib.es2017.string.d.ts",
+                    "es2017.intl": "lib.es2017.intl.d.ts",
+                    "esnext.asynciterable": "lib.esnext.asynciterable.d.ts",
+                }),
+            },
+            showInSimplifiedHelpView: true,
+            category: Diagnostics.Basic_Options,
+            description: Diagnostics.Specify_library_files_to_be_included_in_the_compilation_Colon
+        },
+        {
+            name: "allowJs",
             type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: Diagnostics.Basic_Options,
+            description: Diagnostics.Allow_javascript_files_to_be_compiled
         },
         {
-            name: "inlineSources",
+            name: "checkJs",
             type: "boolean",
+            category: Diagnostics.Basic_Options,
+            description: Diagnostics.Report_errors_in_js_files
         },
         {
             name: "jsx",
-            type: createMap({
+            type: createMapFromTemplate({
                 "preserve": JsxEmit.Preserve,
+                "react-native": JsxEmit.ReactNative,
                 "react": JsxEmit.React
             }),
             paramType: Diagnostics.KIND,
-            description: Diagnostics.Specify_JSX_code_generation_Colon_preserve_or_react,
+            showInSimplifiedHelpView: true,
+            category: Diagnostics.Basic_Options,
+            description: Diagnostics.Specify_JSX_code_generation_Colon_preserve_react_native_or_react,
         },
         {
-            name: "reactNamespace",
-            type: "string",
-            description: Diagnostics.Specify_the_object_invoked_for_createElement_and_spread_when_targeting_react_JSX_emit
+            name: "declaration",
+            shortName: "d",
+            type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: Diagnostics.Basic_Options,
+            description: Diagnostics.Generates_corresponding_d_ts_file,
         },
         {
-            name: "listFiles",
+            name: "sourceMap",
             type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: Diagnostics.Basic_Options,
+            description: Diagnostics.Generates_corresponding_map_file,
         },
         {
-            name: "locale",
+            name: "outFile",
             type: "string",
+            isFilePath: true,
+            paramType: Diagnostics.FILE,
+            showInSimplifiedHelpView: true,
+            category: Diagnostics.Basic_Options,
+            description: Diagnostics.Concatenate_and_emit_output_to_single_file,
         },
         {
-            name: "mapRoot",
+            name: "outDir",
             type: "string",
             isFilePath: true,
-            description: Diagnostics.Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations,
-            paramType: Diagnostics.LOCATION,
+            paramType: Diagnostics.DIRECTORY,
+            showInSimplifiedHelpView: true,
+            category: Diagnostics.Basic_Options,
+            description: Diagnostics.Redirect_output_structure_to_the_directory,
         },
         {
-            name: "module",
-            shortName: "m",
-            type: createMap({
-                "none": ModuleKind.None,
-                "commonjs": ModuleKind.CommonJS,
-                "amd": ModuleKind.AMD,
-                "system": ModuleKind.System,
-                "umd": ModuleKind.UMD,
-                "es6": ModuleKind.ES6,
-                "es2015": ModuleKind.ES2015,
-            }),
-            description: Diagnostics.Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015,
-            paramType: Diagnostics.KIND,
+            name: "rootDir",
+            type: "string",
+            isFilePath: true,
+            paramType: Diagnostics.LOCATION,
+            category: Diagnostics.Basic_Options,
+            description: Diagnostics.Specify_the_root_directory_of_input_files_Use_to_control_the_output_directory_structure_with_outDir,
         },
         {
-            name: "newLine",
-            type: createMap({
-                "crlf": NewLineKind.CarriageReturnLineFeed,
-                "lf": NewLineKind.LineFeed
-            }),
-            description: Diagnostics.Specify_the_end_of_line_sequence_to_be_used_when_emitting_files_Colon_CRLF_dos_or_LF_unix,
-            paramType: Diagnostics.NEWLINE,
+            name: "removeComments",
+            type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: Diagnostics.Basic_Options,
+            description: Diagnostics.Do_not_emit_comments_to_output,
         },
         {
             name: "noEmit",
             type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: Diagnostics.Basic_Options,
             description: Diagnostics.Do_not_emit_outputs,
         },
         {
-            name: "noEmitHelpers",
-            type: "boolean"
+            name: "importHelpers",
+            type: "boolean",
+            category: Diagnostics.Basic_Options,
+            description: Diagnostics.Import_emit_helpers_from_tslib
         },
         {
-            name: "noEmitOnError",
+            name: "downlevelIteration",
             type: "boolean",
-            description: Diagnostics.Do_not_emit_outputs_if_any_errors_were_reported,
+            category: Diagnostics.Basic_Options,
+            description: Diagnostics.Provide_full_support_for_iterables_in_for_of_spread_and_destructuring_when_targeting_ES5_or_ES3
         },
         {
-            name: "noErrorTruncation",
-            type: "boolean"
+            name: "isolatedModules",
+            type: "boolean",
+            category: Diagnostics.Basic_Options,
+            description: Diagnostics.Transpile_each_file_as_a_separate_module_similar_to_ts_transpileModule
+        },
+
+        // Strict Type Checks
+        {
+            name: "strict",
+            type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: Diagnostics.Strict_Type_Checking_Options,
+            description: Diagnostics.Enable_all_strict_type_checking_options
         },
         {
             name: "noImplicitAny",
             type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: Diagnostics.Strict_Type_Checking_Options,
             description: Diagnostics.Raise_error_on_expressions_and_declarations_with_an_implied_any_type,
         },
+        {
+            name: "strictNullChecks",
+            type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: Diagnostics.Strict_Type_Checking_Options,
+            description: Diagnostics.Enable_strict_null_checks
+        },
         {
             name: "noImplicitThis",
             type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: Diagnostics.Strict_Type_Checking_Options,
             description: Diagnostics.Raise_error_on_this_expressions_with_an_implied_any_type,
         },
+        {
+            name: "alwaysStrict",
+            type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: Diagnostics.Strict_Type_Checking_Options,
+            description: Diagnostics.Parse_in_strict_mode_and_emit_use_strict_for_each_source_file
+        },
+
+        // Additional Checks
         {
             name: "noUnusedLocals",
             type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: Diagnostics.Additional_Checks,
             description: Diagnostics.Report_errors_on_unused_locals,
         },
         {
             name: "noUnusedParameters",
             type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: Diagnostics.Additional_Checks,
             description: Diagnostics.Report_errors_on_unused_parameters,
         },
         {
-            name: "noLib",
+            name: "noImplicitReturns",
             type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: Diagnostics.Additional_Checks,
+            description: Diagnostics.Report_error_when_not_all_code_paths_in_function_return_a_value
         },
         {
-            name: "noResolve",
+            name: "noFallthroughCasesInSwitch",
             type: "boolean",
+            showInSimplifiedHelpView: true,
+            category: Diagnostics.Additional_Checks,
+            description: Diagnostics.Report_errors_for_fallthrough_cases_in_switch_statement
         },
+
+        // Module Resolution
         {
-            name: "skipDefaultLibCheck",
-            type: "boolean",
+            name: "moduleResolution",
+            type: createMapFromTemplate({
+                "node": ModuleResolutionKind.NodeJs,
+                "classic": ModuleResolutionKind.Classic,
+            }),
+            paramType: Diagnostics.STRATEGY,
+            category: Diagnostics.Module_Resolution_Options,
+            description: Diagnostics.Specify_module_resolution_strategy_Colon_node_Node_js_or_classic_TypeScript_pre_1_6,
         },
         {
-            name: "skipLibCheck",
-            type: "boolean",
-            description: Diagnostics.Skip_type_checking_of_declaration_files,
+            name: "baseUrl",
+            type: "string",
+            isFilePath: true,
+            category: Diagnostics.Module_Resolution_Options,
+            description: Diagnostics.Base_directory_to_resolve_non_absolute_module_names
         },
         {
-            name: "out",
-            type: "string",
-            isFilePath: false, // This is intentionally broken to support compatability with existing tsconfig files
-            // for correct behaviour, please use outFile
-            paramType: Diagnostics.FILE,
+            // this option can only be specified in tsconfig.json
+            // use type = object to copy the value as-is
+            name: "paths",
+            type: "object",
+            isTSConfigOnly: true,
+            category: Diagnostics.Module_Resolution_Options,
+            description: Diagnostics.A_series_of_entries_which_re_map_imports_to_lookup_locations_relative_to_the_baseUrl
+
         },
         {
-            name: "outFile",
+            // this option can only be specified in tsconfig.json
+            // use type = object to copy the value as-is
+            name: "rootDirs",
+            type: "list",
+            isTSConfigOnly: true,
+            element: {
+                name: "rootDirs",
+                type: "string",
+                isFilePath: true
+            },
+            category: Diagnostics.Module_Resolution_Options,
+            description: Diagnostics.List_of_root_folders_whose_combined_content_represents_the_structure_of_the_project_at_runtime
+        },
+        {
+            name: "typeRoots",
+            type: "list",
+            element: {
+                name: "typeRoots",
+                type: "string",
+                isFilePath: true
+            },
+            category: Diagnostics.Module_Resolution_Options,
+            description: Diagnostics.List_of_folders_to_include_type_definitions_from
+        },
+        {
+            name: "types",
+            type: "list",
+            element: {
+                name: "types",
+                type: "string"
+            },
+            showInSimplifiedHelpView: true,
+            category: Diagnostics.Module_Resolution_Options,
+            description: Diagnostics.Type_declaration_files_to_be_included_in_compilation
+        },
+        {
+            name: "allowSyntheticDefaultImports",
+            type: "boolean",
+            category: Diagnostics.Module_Resolution_Options,
+            description: Diagnostics.Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typechecking
+        },
+
+        // Source Maps
+        {
+            name: "sourceRoot",
             type: "string",
             isFilePath: true,
-            description: Diagnostics.Concatenate_and_emit_output_to_single_file,
-            paramType: Diagnostics.FILE,
+            paramType: Diagnostics.LOCATION,
+            category: Diagnostics.Source_Map_Options,
+            description: Diagnostics.Specify_the_location_where_debugger_should_locate_TypeScript_files_instead_of_source_locations,
         },
         {
-            name: "outDir",
+            name: "mapRoot",
             type: "string",
             isFilePath: true,
-            description: Diagnostics.Redirect_output_structure_to_the_directory,
-            paramType: Diagnostics.DIRECTORY,
+            paramType: Diagnostics.LOCATION,
+            category: Diagnostics.Source_Map_Options,
+            description: Diagnostics.Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations,
         },
         {
-            name: "preserveConstEnums",
+            name: "inlineSourceMap",
             type: "boolean",
-            description: Diagnostics.Do_not_erase_const_enum_declarations_in_generated_code
+            category: Diagnostics.Source_Map_Options,
+            description: Diagnostics.Emit_a_single_file_with_source_maps_instead_of_having_a_separate_file
         },
         {
-            name: "pretty",
-            description: Diagnostics.Stylize_errors_and_messages_using_color_and_context_experimental,
-            type: "boolean"
+            name: "inlineSources",
+            type: "boolean",
+            category: Diagnostics.Source_Map_Options,
+            description: Diagnostics.Emit_the_source_alongside_the_sourcemaps_within_a_single_file_requires_inlineSourceMap_or_sourceMap_to_be_set
         },
+
+        // Experimental
         {
-            name: "project",
-            shortName: "p",
-            type: "string",
-            isFilePath: true,
-            description: Diagnostics.Compile_the_project_in_the_given_directory,
-            paramType: Diagnostics.DIRECTORY
+            name: "experimentalDecorators",
+            type: "boolean",
+            category: Diagnostics.Experimental_Options,
+            description: Diagnostics.Enables_experimental_support_for_ES7_decorators
         },
         {
-            name: "removeComments",
+            name: "emitDecoratorMetadata",
             type: "boolean",
-            description: Diagnostics.Do_not_emit_comments_to_output,
+            category: Diagnostics.Experimental_Options,
+            description: Diagnostics.Enables_experimental_support_for_emitting_type_metadata_for_decorators
         },
+
+        // Advanced
         {
-            name: "rootDir",
+            name: "jsxFactory",
             type: "string",
-            isFilePath: true,
-            paramType: Diagnostics.LOCATION,
-            description: Diagnostics.Specify_the_root_directory_of_input_files_Use_to_control_the_output_directory_structure_with_outDir,
+            category: Diagnostics.Advanced_Options,
+            description: Diagnostics.Specify_the_JSX_factory_function_to_use_when_targeting_react_JSX_emit_e_g_React_createElement_or_h
         },
         {
-            name: "isolatedModules",
+            name: "diagnostics",
             type: "boolean",
+            category: Diagnostics.Advanced_Options,
+            description: Diagnostics.Show_diagnostic_information
         },
         {
-            name: "sourceMap",
+            name: "extendedDiagnostics",
             type: "boolean",
-            description: Diagnostics.Generates_corresponding_map_file,
+            category: Diagnostics.Advanced_Options,
+            description: Diagnostics.Show_verbose_diagnostic_information
         },
         {
-            name: "sourceRoot",
-            type: "string",
-            isFilePath: true,
-            description: Diagnostics.Specify_the_location_where_debugger_should_locate_TypeScript_files_instead_of_source_locations,
-            paramType: Diagnostics.LOCATION,
+            name: "traceResolution",
+            type: "boolean",
+            category: Diagnostics.Advanced_Options,
+            description: Diagnostics.Enable_tracing_of_the_name_resolution_process
         },
         {
-            name: "suppressExcessPropertyErrors",
+            name: "listFiles",
             type: "boolean",
-            description: Diagnostics.Suppress_excess_property_checks_for_object_literals,
-            experimental: true
+            category: Diagnostics.Advanced_Options,
+            description: Diagnostics.Print_names_of_files_part_of_the_compilation
         },
         {
-            name: "suppressImplicitAnyIndexErrors",
+            name: "listEmittedFiles",
             type: "boolean",
-            description: Diagnostics.Suppress_noImplicitAny_errors_for_indexing_objects_lacking_index_signatures,
+            category: Diagnostics.Advanced_Options,
+            description: Diagnostics.Print_names_of_generated_files_part_of_the_compilation
         },
+
         {
-            name: "stripInternal",
+            name: "out",
+            type: "string",
+            isFilePath: false, // This is intentionally broken to support compatability with existing tsconfig files
+            // for correct behaviour, please use outFile
+            category: Diagnostics.Advanced_Options,
+            paramType: Diagnostics.FILE,
+            description: Diagnostics.Deprecated_Use_outFile_instead_Concatenate_and_emit_output_to_single_file,
+        },
+        {
+            name: "reactNamespace",
+            type: "string",
+            category: Diagnostics.Advanced_Options,
+            description: Diagnostics.Deprecated_Use_jsxFactory_instead_Specify_the_object_invoked_for_createElement_when_targeting_react_JSX_emit
+        },
+        {
+            name: "skipDefaultLibCheck",
             type: "boolean",
-            description: Diagnostics.Do_not_emit_declarations_for_code_that_has_an_internal_annotation,
-            experimental: true
+            category: Diagnostics.Advanced_Options,
+            description: Diagnostics.Deprecated_Use_skipLibCheck_instead_Skip_type_checking_of_default_library_declaration_files
         },
         {
-            name: "target",
-            shortName: "t",
-            type: createMap({
-                "es3": ScriptTarget.ES3,
-                "es5": ScriptTarget.ES5,
-                "es6": ScriptTarget.ES6,
-                "es2015": ScriptTarget.ES2015,
-            }),
-            description: Diagnostics.Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015,
-            paramType: Diagnostics.VERSION,
+            name: "charset",
+            type: "string",
+            category: Diagnostics.Advanced_Options,
+            description: Diagnostics.The_character_set_of_the_input_files
         },
         {
-            name: "version",
-            shortName: "v",
+            name: "emitBOM",
             type: "boolean",
-            description: Diagnostics.Print_the_compiler_s_version,
+            category: Diagnostics.Advanced_Options,
+            description: Diagnostics.Emit_a_UTF_8_Byte_Order_Mark_BOM_in_the_beginning_of_output_files
         },
         {
-            name: "watch",
-            shortName: "w",
+            name: "locale",
+            type: "string",
+            category: Diagnostics.Advanced_Options,
+            description: Diagnostics.The_locale_used_when_displaying_messages_to_the_user_e_g_en_us
+        },
+        {
+            name: "newLine",
+            type: createMapFromTemplate({
+                "crlf": NewLineKind.CarriageReturnLineFeed,
+                "lf": NewLineKind.LineFeed
+            }),
+            paramType: Diagnostics.NEWLINE,
+            category: Diagnostics.Advanced_Options,
+            description: Diagnostics.Specify_the_end_of_line_sequence_to_be_used_when_emitting_files_Colon_CRLF_dos_or_LF_unix,
+        },
+        {
+            name: "noErrorTruncation",
             type: "boolean",
-            description: Diagnostics.Watch_input_files,
+            category: Diagnostics.Advanced_Options,
+            description: Diagnostics.Do_not_truncate_error_messages
         },
         {
-            name: "experimentalDecorators",
+            name: "noLib",
             type: "boolean",
-            description: Diagnostics.Enables_experimental_support_for_ES7_decorators
+            category: Diagnostics.Advanced_Options,
+            description: Diagnostics.Do_not_include_the_default_library_file_lib_d_ts
         },
         {
-            name: "emitDecoratorMetadata",
+            name: "noResolve",
             type: "boolean",
-            experimental: true,
-            description: Diagnostics.Enables_experimental_support_for_emitting_type_metadata_for_decorators
+            category: Diagnostics.Advanced_Options,
+            description: Diagnostics.Do_not_add_triple_slash_references_or_imported_modules_to_the_list_of_compiled_files
         },
         {
-            name: "moduleResolution",
-            type: createMap({
-                "node": ModuleResolutionKind.NodeJs,
-                "classic": ModuleResolutionKind.Classic,
-            }),
-            description: Diagnostics.Specify_module_resolution_strategy_Colon_node_Node_js_or_classic_TypeScript_pre_1_6,
-            paramType: Diagnostics.STRATEGY,
+            name: "stripInternal",
+            type: "boolean",
+            category: Diagnostics.Advanced_Options,
+            description: Diagnostics.Do_not_emit_declarations_for_code_that_has_an_internal_annotation,
         },
         {
-            name: "allowUnusedLabels",
+            name: "disableSizeLimit",
             type: "boolean",
-            description: Diagnostics.Do_not_report_errors_on_unused_labels
+            category: Diagnostics.Advanced_Options,
+            description: Diagnostics.Disable_size_limitations_on_JavaScript_projects
         },
         {
-            name: "noImplicitReturns",
+            name: "noImplicitUseStrict",
             type: "boolean",
-            description: Diagnostics.Report_error_when_not_all_code_paths_in_function_return_a_value
+            category: Diagnostics.Advanced_Options,
+            description: Diagnostics.Do_not_emit_use_strict_directives_in_module_output
         },
         {
-            name: "noFallthroughCasesInSwitch",
+            name: "noEmitHelpers",
             type: "boolean",
-            description: Diagnostics.Report_errors_for_fallthrough_cases_in_switch_statement
+            category: Diagnostics.Advanced_Options,
+            description: Diagnostics.Do_not_generate_custom_helper_functions_like_extends_in_compiled_output
         },
         {
-            name: "allowUnreachableCode",
+            name: "noEmitOnError",
             type: "boolean",
-            description: Diagnostics.Do_not_report_errors_on_unreachable_code
+            category: Diagnostics.Advanced_Options,
+            description: Diagnostics.Do_not_emit_outputs_if_any_errors_were_reported,
         },
         {
-            name: "forceConsistentCasingInFileNames",
+            name: "preserveConstEnums",
             type: "boolean",
-            description: Diagnostics.Disallow_inconsistently_cased_references_to_the_same_file
+            category: Diagnostics.Advanced_Options,
+            description: Diagnostics.Do_not_erase_const_enum_declarations_in_generated_code
         },
         {
-            name: "baseUrl",
+            name: "declarationDir",
             type: "string",
             isFilePath: true,
-            description: Diagnostics.Base_directory_to_resolve_non_absolute_module_names
-        },
-        {
-            // this option can only be specified in tsconfig.json
-            // use type = object to copy the value as-is
-            name: "paths",
-            type: "object",
-            isTSConfigOnly: true
-        },
-        {
-            // this option can only be specified in tsconfig.json
-            // use type = object to copy the value as-is
-            name: "rootDirs",
-            type: "list",
-            isTSConfigOnly: true,
-            element: {
-                name: "rootDirs",
-                type: "string",
-                isFilePath: true
-            }
+            paramType: Diagnostics.DIRECTORY,
+            category: Diagnostics.Advanced_Options,
+            description: Diagnostics.Output_directory_for_generated_declaration_files
         },
         {
-            name: "typeRoots",
-            type: "list",
-            element: {
-                name: "typeRoots",
-                type: "string",
-                isFilePath: true
-            }
+            name: "skipLibCheck",
+            type: "boolean",
+            category: Diagnostics.Advanced_Options,
+            description: Diagnostics.Skip_type_checking_of_declaration_files,
         },
         {
-            name: "types",
-            type: "list",
-            element: {
-                name: "types",
-                type: "string"
-            },
-            description: Diagnostics.Type_declaration_files_to_be_included_in_compilation
+            name: "allowUnusedLabels",
+            type: "boolean",
+            category: Diagnostics.Advanced_Options,
+            description: Diagnostics.Do_not_report_errors_on_unused_labels
         },
         {
-            name: "traceResolution",
+            name: "allowUnreachableCode",
             type: "boolean",
-            description: Diagnostics.Enable_tracing_of_the_name_resolution_process
+            category: Diagnostics.Advanced_Options,
+            description: Diagnostics.Do_not_report_errors_on_unreachable_code
         },
         {
-            name: "allowJs",
+            name: "suppressExcessPropertyErrors",
             type: "boolean",
-            description: Diagnostics.Allow_javascript_files_to_be_compiled
+            category: Diagnostics.Advanced_Options,
+            description: Diagnostics.Suppress_excess_property_checks_for_object_literals,
         },
         {
-            name: "allowSyntheticDefaultImports",
+            name: "suppressImplicitAnyIndexErrors",
             type: "boolean",
-            description: Diagnostics.Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typechecking
+            category: Diagnostics.Advanced_Options,
+            description: Diagnostics.Suppress_noImplicitAny_errors_for_indexing_objects_lacking_index_signatures,
         },
         {
-            name: "noImplicitUseStrict",
+            name: "forceConsistentCasingInFileNames",
             type: "boolean",
-            description: Diagnostics.Do_not_emit_use_strict_directives_in_module_output
+            category: Diagnostics.Advanced_Options,
+            description: Diagnostics.Disallow_inconsistently_cased_references_to_the_same_file
         },
         {
             name: "maxNodeModuleJsDepth",
             type: "number",
+            category: Diagnostics.Advanced_Options,
             description: Diagnostics.The_maximum_dependency_depth_to_search_under_node_modules_and_load_JavaScript_files
         },
         {
-            name: "listEmittedFiles",
-            type: "boolean"
+            name: "noStrictGenericChecks",
+            type: "boolean",
+            category: Diagnostics.Advanced_Options,
+            description: Diagnostics.Disable_strict_checking_of_generic_signatures_in_function_types,
         },
         {
-            name: "lib",
+            // A list of plugins to load in the language service
+            name: "plugins",
             type: "list",
+            isTSConfigOnly: true,
             element: {
-                name: "lib",
-                type: createMap({
-                    // JavaScript only
-                    "es5": "lib.es5.d.ts",
-                    "es6": "lib.es2015.d.ts",
-                    "es2015": "lib.es2015.d.ts",
-                    "es7": "lib.es2016.d.ts",
-                    "es2016": "lib.es2016.d.ts",
-                    "es2017": "lib.es2017.d.ts",
-                    // Host only
-                    "dom": "lib.dom.d.ts",
-                    "dom.iterable": "lib.dom.iterable.d.ts",
-                    "webworker": "lib.webworker.d.ts",
-                    "scripthost": "lib.scripthost.d.ts",
-                    // ES2015 Or ESNext By-feature options
-                    "es2015.core": "lib.es2015.core.d.ts",
-                    "es2015.collection": "lib.es2015.collection.d.ts",
-                    "es2015.generator": "lib.es2015.generator.d.ts",
-                    "es2015.iterable": "lib.es2015.iterable.d.ts",
-                    "es2015.promise": "lib.es2015.promise.d.ts",
-                    "es2015.proxy": "lib.es2015.proxy.d.ts",
-                    "es2015.reflect": "lib.es2015.reflect.d.ts",
-                    "es2015.symbol": "lib.es2015.symbol.d.ts",
-                    "es2015.symbol.wellknown": "lib.es2015.symbol.wellknown.d.ts",
-                    "es2016.array.include": "lib.es2016.array.include.d.ts",
-                    "es2017.object": "lib.es2017.object.d.ts",
-                    "es2017.sharedmemory": "lib.es2017.sharedmemory.d.ts"
-                }),
+                name: "plugin",
+                type: "object"
             },
-            description: Diagnostics.Specify_library_files_to_be_included_in_the_compilation_Colon
-        },
-        {
-            name: "disableSizeLimit",
-            type: "boolean"
-        },
-        {
-            name: "strictNullChecks",
-            type: "boolean",
-            description: Diagnostics.Enable_strict_null_checks
-        },
-        {
-            name: "importHelpers",
-            type: "boolean",
-            description: Diagnostics.Import_emit_helpers_from_tslib
+            description: Diagnostics.List_of_language_service_plugins
         }
     ];
 
     /* @internal */
-    export let typingOptionDeclarations: CommandLineOption[] = [
+    export const typeAcquisitionDeclarations: CommandLineOption[] = [
         {
+            /* @deprecated typingOptions.enableAutoDiscovery
+             * Use typeAcquisition.enable instead.
+             */
             name: "enableAutoDiscovery",
             type: "boolean",
         },
+        {
+            name: "enable",
+            type: "boolean",
+        },
         {
             name: "include",
             type: "list",
@@ -481,14 +680,26 @@ namespace ts {
     export const defaultInitCompilerOptions: CompilerOptions = {
         module: ModuleKind.CommonJS,
         target: ScriptTarget.ES5,
-        noImplicitAny: false,
-        sourceMap: false,
+        strict: true
     };
 
     let optionNameMapCache: OptionNameMap;
 
     /* @internal */
-    export function getOptionNameMap(): OptionNameMap {
+    export function convertEnableAutoDiscoveryToEnable(typeAcquisition: TypeAcquisition): TypeAcquisition {
+        // Convert deprecated typingOptions.enableAutoDiscovery to typeAcquisition.enable
+        if (typeAcquisition && typeAcquisition.enableAutoDiscovery !== undefined && typeAcquisition.enable === undefined) {
+            const result: TypeAcquisition = {
+                enable: typeAcquisition.enableAutoDiscovery,
+                include: typeAcquisition.include || [],
+                exclude: typeAcquisition.exclude || []
+            };
+            return result;
+        }
+        return typeAcquisition;
+    }
+
+    function getOptionNameMap(): OptionNameMap {
         if (optionNameMapCache) {
             return optionNameMapCache;
         }
@@ -496,9 +707,9 @@ namespace ts {
         const optionNameMap = createMap<CommandLineOption>();
         const shortOptionNames = createMap<string>();
         forEach(optionDeclarations, option => {
-            optionNameMap[option.name.toLowerCase()] = option;
+            optionNameMap.set(option.name.toLowerCase(), option);
             if (option.shortName) {
-                shortOptionNames[option.shortName] = option.name;
+                shortOptionNames.set(option.shortName, option.name);
             }
         });
 
@@ -508,23 +719,17 @@ namespace ts {
 
     /* @internal */
     export function createCompilerDiagnosticForInvalidCustomType(opt: CommandLineOptionOfCustomType): Diagnostic {
-        const namesOfType: string[] = [];
-        for (const key in opt.type) {
-            namesOfType.push(` '${key}'`);
-        }
-        return createCompilerDiagnostic(Diagnostics.Argument_for_0_option_must_be_Colon_1, `--${opt.name}`, namesOfType);
+        return createDiagnosticForInvalidCustomType(opt, createCompilerDiagnostic);
+    }
+
+    function createDiagnosticForInvalidCustomType(opt: CommandLineOptionOfCustomType, createDiagnostic: (message: DiagnosticMessage, arg0: string, arg1: string) => Diagnostic): Diagnostic {
+        const namesOfType = arrayFrom(opt.type.keys()).map(key => `'${key}'`).join(", ");
+        return createDiagnostic(Diagnostics.Argument_for_0_option_must_be_Colon_1, `--${opt.name}`, namesOfType);
     }
 
     /* @internal */
     export function parseCustomTypeOption(opt: CommandLineOptionOfCustomType, value: string, errors: Diagnostic[]) {
-        const key = trimString((value || "")).toLowerCase();
-        const map = opt.type;
-        if (key in map) {
-            return map[key];
-        }
-        else {
-            errors.push(createCompilerDiagnosticForInvalidCustomType(opt));
-        }
+        return convertJsonOptionOfCustomType(opt, trimString(value || ""), errors);
     }
 
     /* @internal */
@@ -547,12 +752,10 @@ namespace ts {
         }
     }
 
-    /* @internal */
     export function parseCommandLine(commandLine: string[], readFile?: (path: string) => string): ParsedCommandLine {
         const options: CompilerOptions = {};
         const fileNames: string[] = [];
         const errors: Diagnostic[] = [];
-        const { optionNameMap, shortOptionNames } = getOptionNameMap();
 
         parseStrings(commandLine);
         return {
@@ -564,22 +767,14 @@ namespace ts {
         function parseStrings(args: string[]) {
             let i = 0;
             while (i < args.length) {
-                let s = args[i];
+                const s = args[i];
                 i++;
                 if (s.charCodeAt(0) === CharacterCodes.at) {
                     parseResponseFile(s.slice(1));
                 }
                 else if (s.charCodeAt(0) === CharacterCodes.minus) {
-                    s = s.slice(s.charCodeAt(1) === CharacterCodes.minus ? 2 : 1).toLowerCase();
-
-                    // Try to translate short option names to their full equivalents.
-                    if (s in shortOptionNames) {
-                        s = shortOptionNames[s];
-                    }
-
-                    if (s in optionNameMap) {
-                        const opt = optionNameMap[s];
-
+                    const opt = getOptionFromName(s.slice(s.charCodeAt(1) === CharacterCodes.minus ? 2 : 1), /*allowShort*/ true);
+                    if (opt) {
                         if (opt.isTSConfigOnly) {
                             errors.push(createCompilerDiagnostic(Diagnostics.Option_0_can_only_be_specified_in_tsconfig_json_file, opt.name));
                         }
@@ -595,7 +790,13 @@ namespace ts {
                                     i++;
                                     break;
                                 case "boolean":
-                                    options[opt.name] = true;
+                                    // boolean flag has optional value true, false, others
+                                    const optValue = args[i];
+                                    options[opt.name] = optValue !== "false";
+                                    // consume next argument as boolean flag value
+                                    if (optValue === "false" || optValue === "true") {
+                                        i++;
+                                    }
                                     break;
                                 case "string":
                                     options[opt.name] = args[i] || "";
@@ -626,67 +827,373 @@ namespace ts {
             }
         }
 
-        function parseResponseFile(fileName: string) {
-            const text = readFile ? readFile(fileName) : sys.readFile(fileName);
-
-            if (!text) {
-                errors.push(createCompilerDiagnostic(Diagnostics.File_0_not_found, fileName));
-                return;
+        function parseResponseFile(fileName: string) {
+            const text = readFile ? readFile(fileName) : sys.readFile(fileName);
+
+            if (!text) {
+                errors.push(createCompilerDiagnostic(Diagnostics.File_0_not_found, fileName));
+                return;
+            }
+
+            const args: string[] = [];
+            let pos = 0;
+            while (true) {
+                while (pos < text.length && text.charCodeAt(pos) <= CharacterCodes.space) pos++;
+                if (pos >= text.length) break;
+                const start = pos;
+                if (text.charCodeAt(start) === CharacterCodes.doubleQuote) {
+                    pos++;
+                    while (pos < text.length && text.charCodeAt(pos) !== CharacterCodes.doubleQuote) pos++;
+                    if (pos < text.length) {
+                        args.push(text.substring(start + 1, pos));
+                        pos++;
+                    }
+                    else {
+                        errors.push(createCompilerDiagnostic(Diagnostics.Unterminated_quoted_string_in_response_file_0, fileName));
+                    }
+                }
+                else {
+                    while (text.charCodeAt(pos) > CharacterCodes.space) pos++;
+                    args.push(text.substring(start, pos));
+                }
+            }
+            parseStrings(args);
+        }
+    }
+
+    function getOptionFromName(optionName: string, allowShort = false): CommandLineOption | undefined {
+        optionName = optionName.toLowerCase();
+        const { optionNameMap, shortOptionNames } = getOptionNameMap();
+        // Try to translate short option names to their full equivalents.
+        if (allowShort) {
+            const short = shortOptionNames.get(optionName);
+            if (short !== undefined) {
+                optionName = short;
+            }
+        }
+        return optionNameMap.get(optionName);
+    }
+
+    /**
+     * Read tsconfig.json file
+     * @param fileName The path to the config file
+     */
+    export function readConfigFile(fileName: string, readFile: (path: string) => string): { config?: any; error?: Diagnostic } {
+        let text = "";
+        try {
+            text = readFile(fileName);
+        }
+        catch (e) {
+            return { config: {}, error: createCompilerDiagnostic(Diagnostics.Cannot_read_file_0_Colon_1, fileName, e.message) };
+        }
+        return parseConfigFileTextToJson(fileName, text);
+    }
+
+    /**
+     * Parse the text of the tsconfig.json file
+     * @param fileName The path to the config file
+     * @param jsonText The text of the config file
+     */
+    export function parseConfigFileTextToJson(fileName: string, jsonText: string): { config?: any; error?: Diagnostic } {
+        const jsonSourceFile = parseJsonText(fileName, jsonText);
+        return {
+            config: convertToObject(jsonSourceFile, jsonSourceFile.parseDiagnostics),
+            error: jsonSourceFile.parseDiagnostics.length ? jsonSourceFile.parseDiagnostics[0] : undefined
+        };
+    }
+
+    /**
+     * Read tsconfig.json file
+     * @param fileName The path to the config file
+     */
+    export function readJsonConfigFile(fileName: string, readFile: (path: string) => string): JsonSourceFile {
+        let text = "";
+        try {
+            text = readFile(fileName);
+        }
+        catch (e) {
+            return <JsonSourceFile>{ parseDiagnostics: [createCompilerDiagnostic(Diagnostics.Cannot_read_file_0_Colon_1, fileName, e.message)] };
+        }
+        return parseJsonText(fileName, text);
+    }
+
+    function commandLineOptionsToMap(options: CommandLineOption[]) {
+        return arrayToMap(options, option => option.name);
+    }
+
+    let _tsconfigRootOptions: Map<CommandLineOption>;
+    function getTsconfigRootOptionsMap() {
+        if (_tsconfigRootOptions === undefined) {
+            _tsconfigRootOptions = commandLineOptionsToMap([
+                {
+                    name: "compilerOptions",
+                    type: "object",
+                    elementOptions: commandLineOptionsToMap(optionDeclarations),
+                    extraKeyDiagnosticMessage: Diagnostics.Unknown_compiler_option_0
+                },
+                {
+                    name: "typingOptions",
+                    type: "object",
+                    elementOptions: commandLineOptionsToMap(typeAcquisitionDeclarations),
+                    extraKeyDiagnosticMessage: Diagnostics.Unknown_type_acquisition_option_0
+                },
+                {
+                    name: "typeAcquisition",
+                    type: "object",
+                    elementOptions: commandLineOptionsToMap(typeAcquisitionDeclarations),
+                    extraKeyDiagnosticMessage: Diagnostics.Unknown_type_acquisition_option_0
+                },
+                {
+                    name: "extends",
+                    type: "string"
+                },
+                {
+                    name: "files",
+                    type: "list",
+                    element: {
+                        name: "files",
+                        type: "string"
+                    }
+                },
+                {
+                    name: "include",
+                    type: "list",
+                    element: {
+                        name: "include",
+                        type: "string"
+                    }
+                },
+                {
+                    name: "exclude",
+                    type: "list",
+                    element: {
+                        name: "exclude",
+                        type: "string"
+                    }
+                },
+                compileOnSaveCommandLineOption
+            ]);
+        }
+        return _tsconfigRootOptions;
+    }
+
+    interface JsonConversionNotifier {
+        /**
+         * Notifies parent option object is being set with the optionKey and a valid optionValue
+         * Currently it notifies only if there is element with type object (parentOption) and
+         * has element's option declarations map associated with it
+         * @param parentOption parent option name in which the option and value are being set
+         * @param option option declaration which is being set with the value
+         * @param value value of the option
+         */
+        onSetValidOptionKeyValueInParent(parentOption: string, option: CommandLineOption, value: CompilerOptionsValue): void;
+        /**
+         * Notify when valid root key value option is being set
+         * @param key option key
+         * @param keyNode node corresponding to node in the source file
+         * @param value computed value of the key
+         * @param ValueNode node corresponding to value in the source file
+         */
+        onSetValidOptionKeyValueInRoot(key: string, keyNode: PropertyName, value: CompilerOptionsValue, valueNode: Expression): void;
+        /**
+         * Notify when unknown root key value option is being set
+         * @param key option key
+         * @param keyNode node corresponding to node in the source file
+         * @param value computed value of the key
+         * @param ValueNode node corresponding to value in the source file
+         */
+        onSetUnknownOptionKeyValueInRoot(key: string, keyNode: PropertyName, value: CompilerOptionsValue, valueNode: Expression): void;
+    }
+
+    /**
+     * Convert the json syntax tree into the json value
+     */
+    export function convertToObject(sourceFile: JsonSourceFile, errors: Diagnostic[]): any {
+        return convertToObjectWorker(sourceFile, errors, /*knownRootOptions*/ undefined, /*jsonConversionNotifier*/ undefined);
+    }
+
+    /**
+     * Convert the json syntax tree into the json value
+     */
+    function convertToObjectWorker(
+        sourceFile: JsonSourceFile,
+        errors: Diagnostic[],
+        knownRootOptions: Map<CommandLineOption> | undefined,
+        jsonConversionNotifier: JsonConversionNotifier | undefined): any {
+        if (!sourceFile.jsonObject) {
+            return {};
+        }
+
+        return convertObjectLiteralExpressionToJson(sourceFile.jsonObject, knownRootOptions,
+            /*extraKeyDiagnosticMessage*/ undefined, /*parentOption*/ undefined);
+
+        function convertObjectLiteralExpressionToJson(
+            node: ObjectLiteralExpression,
+            knownOptions: Map<CommandLineOption> | undefined,
+            extraKeyDiagnosticMessage: DiagnosticMessage | undefined,
+            parentOption: string | undefined
+        ): any {
+            const result: any = {};
+            for (const element of node.properties) {
+                if (element.kind !== SyntaxKind.PropertyAssignment) {
+                    errors.push(createDiagnosticForNodeInSourceFile(sourceFile, element, Diagnostics.Property_assignment_expected));
+                    continue;
+                }
+
+                if (element.questionToken) {
+                    errors.push(createDiagnosticForNodeInSourceFile(sourceFile, element.questionToken, Diagnostics._0_can_only_be_used_in_a_ts_file, "?"));
+                }
+                if (!isDoubleQuotedString(element.name)) {
+                    errors.push(createDiagnosticForNodeInSourceFile(sourceFile, element.name, Diagnostics.String_literal_with_double_quotes_expected));
+                }
+
+                const keyText = getTextOfPropertyName(element.name);
+                const option = knownOptions ? knownOptions.get(keyText) : undefined;
+                if (extraKeyDiagnosticMessage && !option) {
+                    errors.push(createDiagnosticForNodeInSourceFile(sourceFile, element.name, extraKeyDiagnosticMessage, keyText));
+                }
+                const value = convertPropertyValueToJson(element.initializer, option);
+                if (typeof keyText !== undefined && typeof value !== undefined) {
+                    result[keyText] = value;
+                    // Notify key value set, if user asked for it
+                    if (jsonConversionNotifier &&
+                        // Current callbacks are only on known parent option or if we are setting values in the root
+                        (parentOption || knownOptions === knownRootOptions)) {
+                        const isValidOptionValue = isCompilerOptionsValue(option, value);
+                        if (parentOption) {
+                            if (isValidOptionValue) {
+                                // Notify option set in the parent if its a valid option value
+                                jsonConversionNotifier.onSetValidOptionKeyValueInParent(parentOption, option, value);
+                            }
+                        }
+                        else if (knownOptions === knownRootOptions) {
+                            if (isValidOptionValue) {
+                                // Notify about the valid root key value being set
+                                jsonConversionNotifier.onSetValidOptionKeyValueInRoot(keyText, element.name, value, element.initializer);
+                            }
+                            else if (!option) {
+                                // Notify about the unknown root key value being set
+                                jsonConversionNotifier.onSetUnknownOptionKeyValueInRoot(keyText, element.name, value, element.initializer);
+                            }
+                        }
+                    }
+                }
+            }
+            return result;
+        }
+
+        function convertArrayLiteralExpressionToJson(
+            elements: NodeArray<Expression>,
+            elementOption: CommandLineOption | undefined
+        ): any[] {
+            const result: any[] = [];
+            for (const element of elements) {
+                result.push(convertPropertyValueToJson(element, elementOption));
             }
+            return result;
+        }
 
-            const args: string[] = [];
-            let pos = 0;
-            while (true) {
-                while (pos < text.length && text.charCodeAt(pos) <= CharacterCodes.space) pos++;
-                if (pos >= text.length) break;
-                const start = pos;
-                if (text.charCodeAt(start) === CharacterCodes.doubleQuote) {
-                    pos++;
-                    while (pos < text.length && text.charCodeAt(pos) !== CharacterCodes.doubleQuote) pos++;
-                    if (pos < text.length) {
-                        args.push(text.substring(start + 1, pos));
-                        pos++;
+        function convertPropertyValueToJson(valueExpression: Expression, option: CommandLineOption): any {
+            switch (valueExpression.kind) {
+                case SyntaxKind.TrueKeyword:
+                    reportInvalidOptionValue(option && option.type !== "boolean");
+                    return true;
+
+                case SyntaxKind.FalseKeyword:
+                    reportInvalidOptionValue(option && option.type !== "boolean");
+                    return false;
+
+                case SyntaxKind.NullKeyword:
+                    reportInvalidOptionValue(!!option);
+                    return null; // tslint:disable-line:no-null-keyword
+
+                case SyntaxKind.StringLiteral:
+                    if (!isDoubleQuotedString(valueExpression)) {
+                        errors.push(createDiagnosticForNodeInSourceFile(sourceFile, valueExpression, Diagnostics.String_literal_with_double_quotes_expected));
+                    }
+                    reportInvalidOptionValue(option && (typeof option.type === "string" && option.type !== "string"));
+                    const text = (<StringLiteral>valueExpression).text;
+                    if (option && typeof option.type !== "string") {
+                        const customOption = <CommandLineOptionOfCustomType>option;
+                        // Validate custom option type
+                        if (!customOption.type.has(text)) {
+                            errors.push(
+                                createDiagnosticForInvalidCustomType(
+                                    customOption,
+                                    (message, arg0, arg1) => createDiagnosticForNodeInSourceFile(sourceFile, valueExpression, message, arg0, arg1)
+                                )
+                            );
+                        }
+                    }
+                    return text;
+
+                case SyntaxKind.NumericLiteral:
+                    reportInvalidOptionValue(option && option.type !== "number");
+                    return Number((<NumericLiteral>valueExpression).text);
+
+                case SyntaxKind.ObjectLiteralExpression:
+                    reportInvalidOptionValue(option && option.type !== "object");
+                    const objectLiteralExpression = <ObjectLiteralExpression>valueExpression;
+
+                    // Currently having element option declaration in the tsconfig with type "object"
+                    // determines if it needs onSetValidOptionKeyValueInParent callback or not
+                    // At moment there are only "compilerOptions", "typeAcquisition" and "typingOptions"
+                    // that satifies it and need it to modify options set in them (for normalizing file paths)
+                    // vs what we set in the json
+                    // If need arises, we can modify this interface and callbacks as needed
+                    if (option) {
+                        const { elementOptions, extraKeyDiagnosticMessage, name: optionName } = <TsConfigOnlyOption>option;
+                        return convertObjectLiteralExpressionToJson(objectLiteralExpression,
+                            elementOptions, extraKeyDiagnosticMessage, optionName);
                     }
                     else {
-                        errors.push(createCompilerDiagnostic(Diagnostics.Unterminated_quoted_string_in_response_file_0, fileName));
+                        return convertObjectLiteralExpressionToJson(
+                            objectLiteralExpression, /* knownOptions*/ undefined,
+                            /*extraKeyDiagnosticMessage */ undefined, /*parentOption*/ undefined);
                     }
-                }
-                else {
-                    while (text.charCodeAt(pos) > CharacterCodes.space) pos++;
-                    args.push(text.substring(start, pos));
+
+                case SyntaxKind.ArrayLiteralExpression:
+                    reportInvalidOptionValue(option && option.type !== "list");
+                    return convertArrayLiteralExpressionToJson(
+                        (<ArrayLiteralExpression>valueExpression).elements,
+                        option && (<CommandLineOptionOfListType>option).element);
+            }
+
+            // Not in expected format
+            if (option) {
+                reportInvalidOptionValue(/*isError*/ true);
+            }
+            else {
+                errors.push(createDiagnosticForNodeInSourceFile(sourceFile, valueExpression, Diagnostics.Property_value_can_only_be_string_literal_numeric_literal_true_false_null_object_literal_or_array_literal));
+            }
+
+            return undefined;
+
+            function reportInvalidOptionValue(isError: boolean) {
+                if (isError) {
+                    errors.push(createDiagnosticForNodeInSourceFile(sourceFile, valueExpression, Diagnostics.Compiler_option_0_requires_a_value_of_type_1, option.name, getCompilerOptionValueTypeString(option)));
                 }
             }
-            parseStrings(args);
         }
-    }
 
-    /**
-      * Read tsconfig.json file
-      * @param fileName The path to the config file
-      */
-    export function readConfigFile(fileName: string, readFile: (path: string) => string): { config?: any; error?: Diagnostic } {
-        let text = "";
-        try {
-            text = readFile(fileName);
-        }
-        catch (e) {
-            return { error: createCompilerDiagnostic(Diagnostics.Cannot_read_file_0_Colon_1, fileName, e.message) };
+        function isDoubleQuotedString(node: Node) {
+            return node.kind === SyntaxKind.StringLiteral && getSourceTextOfNodeFromSourceFile(sourceFile, node).charCodeAt(0) === CharacterCodes.doubleQuote;
         }
-        return parseConfigFileTextToJson(fileName, text);
     }
 
-    /**
-      * Parse the text of the tsconfig.json file
-      * @param fileName The path to the config file
-      * @param jsonText The text of the config file
-      */
-    export function parseConfigFileTextToJson(fileName: string, jsonText: string, stripComments = true): { config?: any; error?: Diagnostic } {
-        try {
-            const jsonTextToParse = stripComments ? removeComments(jsonText) : jsonText;
-            return { config: /\S/.test(jsonTextToParse) ? JSON.parse(jsonTextToParse) : {} };
-        }
-        catch (e) {
-            return { error: createCompilerDiagnostic(Diagnostics.Failed_to_parse_file_0_Colon_1, fileName, e.message) };
+    function getCompilerOptionValueTypeString(option: CommandLineOption) {
+        return option.type === "list" ?
+            "Array" :
+            typeof option.type === "string" ? option.type : "string";
+    }
+
+    function isCompilerOptionsValue(option: CommandLineOption, value: any): value is CompilerOptionsValue {
+        if (option) {
+            if (option.type === "list") {
+                return isArray(value);
+            }
+            const expectedType = typeof option.type === "string" ? option.type : "string";
+            return typeof value === expectedType;
         }
     }
 
@@ -696,9 +1203,9 @@ namespace ts {
      * @param fileNames array of filenames to be generated into tsconfig.json
      */
     /* @internal */
-    export function generateTSConfig(options: CompilerOptions, fileNames: string[]): { compilerOptions: Map<CompilerOptionsValue> } {
+    export function generateTSConfig(options: CompilerOptions, fileNames: string[], newLine: string): string {
         const compilerOptions = extend(options, defaultInitCompilerOptions);
-        const configurations: any = {
+        const configurations: { compilerOptions: MapLike<CompilerOptionsValue>; files?: string[] } = {
             compilerOptions: serializeCompilerOptions(compilerOptions)
         };
         if (fileNames && fileNames.length) {
@@ -706,7 +1213,8 @@ namespace ts {
             configurations.files = fileNames;
         }
 
-        return configurations;
+
+        return writeConfigurations();
 
         function getCustomTypeMapOfCommandLineOption(optionDefinition: CommandLineOption): Map<string | number> | undefined {
             if (optionDefinition.type === "string" || optionDefinition.type === "number" || optionDefinition.type === "boolean") {
@@ -721,220 +1229,247 @@ namespace ts {
             }
         }
 
-        function getNameOfCompilerOptionValue(value: CompilerOptionsValue, customTypeMap: MapLike<string | number>): string | undefined {
+        function getNameOfCompilerOptionValue(value: CompilerOptionsValue, customTypeMap: Map<string | number>): string | undefined {
             // There is a typeMap associated with this command-line option so use it to map value back to its name
-            for (const key in customTypeMap) {
-                if (customTypeMap[key] === value) {
+            return forEachEntry(customTypeMap, (mapValue, key) => {
+                if (mapValue === value) {
                     return key;
                 }
-            }
-            return undefined;
+            });
         }
 
-        function serializeCompilerOptions(options: CompilerOptions): Map<CompilerOptionsValue> {
-            const result = createMap<CompilerOptionsValue>();
+        function serializeCompilerOptions(options: CompilerOptions): MapLike<CompilerOptionsValue> {
+            const result: ts.MapLike<CompilerOptionsValue> = {};
             const optionsNameMap = getOptionNameMap().optionNameMap;
 
             for (const name in options) {
                 if (hasProperty(options, name)) {
                     // tsconfig only options cannot be specified via command line,
                     // so we can assume that only types that can appear here string | number | boolean
-                    switch (name) {
-                        case "init":
-                        case "watch":
-                        case "version":
-                        case "help":
-                        case "project":
-                            break;
-                        default:
-                            const value = options[name];
-                            let optionDefinition = optionsNameMap[name.toLowerCase()];
-                            if (optionDefinition) {
-                                const customTypeMap = getCustomTypeMapOfCommandLineOption(optionDefinition);
-                                if (!customTypeMap) {
-                                    // There is no map associated with this compiler option then use the value as-is
-                                    // This is the case if the value is expect to be string, number, boolean or list of string
-                                    result[name] = value;
-                                }
-                                else {
-                                    if (optionDefinition.type === "list") {
-                                        const convertedValue: string[] = [];
-                                        for (const element of value as (string | number)[]) {
-                                            convertedValue.push(getNameOfCompilerOptionValue(element, customTypeMap));
-                                        }
-                                        result[name] = convertedValue;
-                                    }
-                                    else {
-                                        // There is a typeMap associated with this command-line option so use it to map value back to its name
-                                        result[name] = getNameOfCompilerOptionValue(value, customTypeMap);
-                                    }
+                    if (optionsNameMap.has(name) && optionsNameMap.get(name).category === Diagnostics.Command_line_Options) {
+                        continue;
+                    }
+                    const value = <CompilerOptionsValue>options[name];
+                    const optionDefinition = optionsNameMap.get(name.toLowerCase());
+                    if (optionDefinition) {
+                        const customTypeMap = getCustomTypeMapOfCommandLineOption(optionDefinition);
+                        if (!customTypeMap) {
+                            // There is no map associated with this compiler option then use the value as-is
+                            // This is the case if the value is expect to be string, number, boolean or list of string
+                            result[name] = value;
+                        }
+                        else {
+                            if (optionDefinition.type === "list") {
+                                const convertedValue: string[] = [];
+                                for (const element of value as (string | number)[]) {
+                                    convertedValue.push(getNameOfCompilerOptionValue(element, customTypeMap));
                                 }
+                                result[name] = convertedValue;
                             }
-                            break;
+                            else {
+                                // There is a typeMap associated with this command-line option so use it to map value back to its name
+                                result[name] = getNameOfCompilerOptionValue(value, customTypeMap);
+                            }
+                        }
                     }
                 }
             }
             return result;
         }
-    }
 
-    /**
-     * Remove the comments from a json like text.
-     * Comments can be single line comments (starting with # or //) or multiline comments using / * * /
-     *
-     * This method replace comment content by whitespace rather than completely remove them to keep positions in json parsing error reporting accurate.
-     */
-    function removeComments(jsonText: string): string {
-        let output = "";
-        const scanner = createScanner(ScriptTarget.ES5, /* skipTrivia */ false, LanguageVariant.Standard, jsonText);
-        let token: SyntaxKind;
-        while ((token = scanner.scan()) !== SyntaxKind.EndOfFileToken) {
-            switch (token) {
-                case SyntaxKind.SingleLineCommentTrivia:
-                case SyntaxKind.MultiLineCommentTrivia:
-                    // replace comments with whitespace to preserve original character positions
-                    output += scanner.getTokenText().replace(/\S/g, " ");
-                    break;
+        function getDefaultValueForOption(option: CommandLineOption) {
+            switch (option.type) {
+                case "number":
+                    return 1;
+                case "boolean":
+                    return true;
+                case "string":
+                    return option.isFilePath ? "./" : "";
+                case "list":
+                    return [];
+                case "object":
+                    return {};
                 default:
-                    output += scanner.getTokenText();
-                    break;
+                    return arrayFrom((<CommandLineOptionOfCustomType>option).type.keys())[0];
             }
         }
-        return output;
-    }
 
-    /**
-      * Parse the contents of a config file (tsconfig.json).
-      * @param json The contents of the config file to parse
-      * @param host Instance of ParseConfigHost used to enumerate files in folder.
-      * @param basePath A root directory to resolve relative path entries in the config
-      *    file to. e.g. outDir
-      */
-    export function parseJsonConfigFileContent(json: any, host: ParseConfigHost, basePath: string, existingOptions: CompilerOptions = {}, configFileName?: string, resolutionStack: Path[] = []): ParsedCommandLine {
-        const errors: Diagnostic[] = [];
-        const getCanonicalFileName = createGetCanonicalFileName(host.useCaseSensitiveFileNames);
-        const resolvedPath = toPath(configFileName || "", basePath, getCanonicalFileName);
-        if (resolutionStack.indexOf(resolvedPath) >= 0) {
-            return {
-                options: {},
-                fileNames: [],
-                typingOptions: {},
-                raw: json,
-                errors: [createCompilerDiagnostic(Diagnostics.Circularity_detected_while_resolving_configuration_Colon_0, [...resolutionStack, resolvedPath].join(" -> "))],
-                wildcardDirectories: {}
-            };
+        function makePadding(paddingLength: number): string {
+            return Array(paddingLength + 1).join(" ");
         }
 
-        let options: CompilerOptions = convertCompilerOptionsFromJsonWorker(json["compilerOptions"], basePath, errors, configFileName);
-        const typingOptions: TypingOptions = convertTypingOptionsFromJsonWorker(json["typingOptions"], basePath, errors, configFileName);
-
-        if (json["extends"]) {
-            let [include, exclude, files, baseOptions]: [string[], string[], string[], CompilerOptions] = [undefined, undefined, undefined, {}];
-            if (typeof json["extends"] === "string") {
-                [include, exclude, files, baseOptions] = (tryExtendsName(json["extends"]) || [include, exclude, files, baseOptions]);
-            }
-            else {
-                errors.push(createCompilerDiagnostic(Diagnostics.Compiler_option_0_requires_a_value_of_type_1, "extends", "string"));
+        function writeConfigurations() {
+            // Filter applicable options to place in the file
+            const categorizedOptions = reduceLeft(
+                filter(optionDeclarations, o => o.category !== Diagnostics.Command_line_Options && o.category !== Diagnostics.Advanced_Options),
+                (memo, value) => {
+                    if (value.category) {
+                        const name = getLocaleSpecificMessage(value.category);
+                        (memo[name] || (memo[name] = [])).push(value);
+                    }
+                    return memo;
+                }, <MapLike<CommandLineOption[]>>{});
+
+            // Serialize all options and thier descriptions
+            let marginLength = 0;
+            let seenKnownKeys = 0;
+            const nameColumn: string[] = [];
+            const descriptionColumn: string[] = [];
+            const knownKeysCount = getOwnKeys(configurations.compilerOptions).length;
+            for (const category in categorizedOptions) {
+                if (nameColumn.length !== 0) {
+                    nameColumn.push("");
+                    descriptionColumn.push("");
+                }
+                nameColumn.push(`/* ${category} */`);
+                descriptionColumn.push("");
+                for (const option of categorizedOptions[category]) {
+                    let optionName;
+                    if (hasProperty(configurations.compilerOptions, option.name)) {
+                        optionName = `"${option.name}": ${JSON.stringify(configurations.compilerOptions[option.name])}${(seenKnownKeys += 1) === knownKeysCount ? "" : ","}`;
+                    }
+                    else {
+                        optionName = `// "${option.name}": ${JSON.stringify(getDefaultValueForOption(option))},`;
+                    }
+                    nameColumn.push(optionName);
+                    descriptionColumn.push(`/* ${option.description && getLocaleSpecificMessage(option.description) || option.name} */`);
+                    marginLength = Math.max(optionName.length, marginLength);
+                }
             }
-            if (include && !json["include"]) {
-                json["include"] = include;
+
+            // Write the output
+            const tab = makePadding(2);
+            const result: string[] = [];
+            result.push(`{`);
+            result.push(`${tab}"compilerOptions": {`);
+            // Print out each row, aligning all the descriptions on the same column.
+            for (let i = 0; i < nameColumn.length; i++) {
+                const optionName = nameColumn[i];
+                const description = descriptionColumn[i];
+                result.push(optionName && `${tab}${tab}${optionName}${ description && (makePadding(marginLength - optionName.length + 2) + description)}`);
             }
-            if (exclude && !json["exclude"]) {
-                json["exclude"] = exclude;
+            if (configurations.files && configurations.files.length) {
+                result.push(`${tab}},`);
+                result.push(`${tab}"files": [`);
+                for (let i = 0; i < configurations.files.length; i++) {
+                    result.push(`${tab}${tab}${JSON.stringify(configurations.files[i])}${i === configurations.files.length - 1 ? "" : ","}`);
+                }
+                result.push(`${tab}]`);
             }
-            if (files && !json["files"]) {
-                json["files"] = files;
+            else {
+                result.push(`${tab}}`);
             }
-            options = assign({}, baseOptions, options);
+            result.push(`}`);
+
+            return result.join(newLine);
         }
+    }
 
-        options = extend(existingOptions, options);
-        options.configFilePath = configFileName;
+    /**
+     * Parse the contents of a config file (tsconfig.json).
+     * @param json The contents of the config file to parse
+     * @param host Instance of ParseConfigHost used to enumerate files in folder.
+     * @param basePath A root directory to resolve relative path entries in the config
+     *    file to. e.g. outDir
+     */
+    export function parseJsonConfigFileContent(json: any, host: ParseConfigHost, basePath: string, existingOptions?: CompilerOptions, configFileName?: string, resolutionStack?: Path[], extraFileExtensions?: JsFileExtensionInfo[]): ParsedCommandLine {
+        return parseJsonConfigFileContentWorker(json, /*sourceFile*/ undefined, host, basePath, existingOptions, configFileName, resolutionStack, extraFileExtensions);
+    }
+
+    /**
+     * Parse the contents of a config file (tsconfig.json).
+     * @param jsonNode The contents of the config file to parse
+     * @param host Instance of ParseConfigHost used to enumerate files in folder.
+     * @param basePath A root directory to resolve relative path entries in the config
+     *    file to. e.g. outDir
+     */
+    export function parseJsonSourceFileConfigFileContent(sourceFile: JsonSourceFile, host: ParseConfigHost, basePath: string, existingOptions?: CompilerOptions, configFileName?: string, resolutionStack?: Path[], extraFileExtensions?: JsFileExtensionInfo[]): ParsedCommandLine {
+        return parseJsonConfigFileContentWorker(/*json*/ undefined, sourceFile, host, basePath, existingOptions, configFileName, resolutionStack, extraFileExtensions);
+    }
+
+    /*@internal*/
+    export function setConfigFileInOptions(options: CompilerOptions, configFile: JsonSourceFile) {
+        if (configFile) {
+            Object.defineProperty(options, "configFile", { enumerable: false, writable: false, value: configFile });
+        }
+    }
 
-        const { fileNames, wildcardDirectories } = getFileNames(errors);
-        const compileOnSave = convertCompileOnSaveOptionFromJson(json, basePath, errors);
+    /**
+     * Parse the contents of a config file from json or json source file (tsconfig.json).
+     * @param json The contents of the config file to parse
+     * @param sourceFile sourceFile corresponding to the Json
+     * @param host Instance of ParseConfigHost used to enumerate files in folder.
+     * @param basePath A root directory to resolve relative path entries in the config
+     *    file to. e.g. outDir
+     * @param resolutionStack Only present for backwards-compatibility. Should be empty.
+     */
+    function parseJsonConfigFileContentWorker(
+        json: any,
+        sourceFile: JsonSourceFile,
+        host: ParseConfigHost,
+        basePath: string,
+        existingOptions: CompilerOptions = {},
+        configFileName?: string,
+        resolutionStack: Path[] = [],
+        extraFileExtensions: JsFileExtensionInfo[] = [],
+    ): ParsedCommandLine {
+        Debug.assert((json === undefined && sourceFile !== undefined) || (json !== undefined && sourceFile === undefined));
+        const errors: Diagnostic[] = [];
 
+        const parsedConfig = parseConfig(json, sourceFile, host, basePath, configFileName, resolutionStack, errors);
+        const { raw } = parsedConfig;
+        const options = extend(existingOptions, parsedConfig.options || {});
+        options.configFilePath = configFileName;
+        setConfigFileInOptions(options, sourceFile);
+        const { fileNames, wildcardDirectories } = getFileNames();
         return {
             options,
             fileNames,
-            typingOptions,
-            raw: json,
+            typeAcquisition: parsedConfig.typeAcquisition || getDefaultTypeAcquisition(),
+            raw,
             errors,
             wildcardDirectories,
-            compileOnSave
+            compileOnSave: !!raw.compileOnSave
         };
 
-        function tryExtendsName(extendedConfig: string): [string[], string[], string[], CompilerOptions] {
-            // If the path isn't a rooted or relative path, don't try to resolve it (we reserve the right to special case module-id like paths in the future)
-            if (!(isRootedDiskPath(extendedConfig) || startsWith(normalizeSlashes(extendedConfig), "./") || startsWith(normalizeSlashes(extendedConfig), "../"))) {
-                errors.push(createCompilerDiagnostic(Diagnostics.The_path_in_an_extends_options_must_be_relative_or_rooted));
-                return;
-            }
-            let extendedConfigPath = toPath(extendedConfig, basePath, getCanonicalFileName);
-            if (!host.fileExists(extendedConfigPath) && !endsWith(extendedConfigPath, ".json")) {
-                extendedConfigPath = `${extendedConfigPath}.json` as Path;
-                if (!host.fileExists(extendedConfigPath)) {
-                    errors.push(createCompilerDiagnostic(Diagnostics.File_0_does_not_exist, extendedConfig));
-                    return;
-                }
-            }
-            const extendedResult = readConfigFile(extendedConfigPath, path => host.readFile(path));
-            if (extendedResult.error) {
-                errors.push(extendedResult.error);
-                return;
-            }
-            const extendedDirname = getDirectoryPath(extendedConfigPath);
-            const relativeDifference = convertToRelativePath(extendedDirname, basePath, getCanonicalFileName);
-            const updatePath: (path: string) => string = path => isRootedDiskPath(path) ? path : combinePaths(relativeDifference, path);
-            // Merge configs (copy the resolution stack so it is never reused between branches in potential diamond-problem scenarios)
-            const result = parseJsonConfigFileContent(extendedResult.config, host, extendedDirname, /*existingOptions*/undefined, getBaseFileName(extendedConfigPath), resolutionStack.concat([resolvedPath]));
-            errors.push(...result.errors);
-            const [include, exclude, files] = map(["include", "exclude", "files"], key => {
-                if (!json[key] && extendedResult.config[key]) {
-                    return map(extendedResult.config[key], updatePath);
-                }
-            });
-            return [include, exclude, files, result.options];
-        }
-
-        function getFileNames(errors: Diagnostic[]): ExpandResult {
+        function getFileNames(): ExpandResult {
             let fileNames: string[];
-            if (hasProperty(json, "files")) {
-                if (isArray(json["files"])) {
-                    fileNames = <string[]>json["files"];
+            if (hasProperty(raw, "files")) {
+                if (isArray(raw["files"])) {
+                    fileNames = <string[]>raw["files"];
+                    if (fileNames.length === 0) {
+                        createCompilerDiagnosticOnlyIfJson(Diagnostics.The_files_list_in_config_file_0_is_empty, configFileName || "tsconfig.json");
+                    }
                 }
                 else {
-                    errors.push(createCompilerDiagnostic(Diagnostics.Compiler_option_0_requires_a_value_of_type_1, "files", "Array"));
+                    createCompilerDiagnosticOnlyIfJson(Diagnostics.Compiler_option_0_requires_a_value_of_type_1, "files", "Array");
                 }
             }
 
             let includeSpecs: string[];
-            if (hasProperty(json, "include")) {
-                if (isArray(json["include"])) {
-                    includeSpecs = <string[]>json["include"];
+            if (hasProperty(raw, "include")) {
+                if (isArray(raw["include"])) {
+                    includeSpecs = <string[]>raw["include"];
                 }
                 else {
-                    errors.push(createCompilerDiagnostic(Diagnostics.Compiler_option_0_requires_a_value_of_type_1, "include", "Array"));
+                    createCompilerDiagnosticOnlyIfJson(Diagnostics.Compiler_option_0_requires_a_value_of_type_1, "include", "Array");
                 }
             }
 
             let excludeSpecs: string[];
-            if (hasProperty(json, "exclude")) {
-                if (isArray(json["exclude"])) {
-                    excludeSpecs = <string[]>json["exclude"];
+            if (hasProperty(raw, "exclude")) {
+                if (isArray(raw["exclude"])) {
+                    excludeSpecs = <string[]>raw["exclude"];
                 }
                 else {
-                    errors.push(createCompilerDiagnostic(Diagnostics.Compiler_option_0_requires_a_value_of_type_1, "exclude", "Array"));
+                    createCompilerDiagnosticOnlyIfJson(Diagnostics.Compiler_option_0_requires_a_value_of_type_1, "exclude", "Array");
                 }
             }
-            else if (hasProperty(json, "excludes")) {
-                errors.push(createCompilerDiagnostic(Diagnostics.Unknown_option_excludes_Did_you_mean_exclude));
-            }
             else {
-                // By default, exclude common package folders and the outDir
-                excludeSpecs = ["node_modules", "bower_components", "jspm_packages"];
+                // If no includes were specified, exclude common package folders and the outDir
+                excludeSpecs = includeSpecs ? [] : ["node_modules", "bower_components", "jspm_packages"];
 
-                const outDir = json["compilerOptions"] && json["compilerOptions"]["outDir"];
+                const outDir = raw["compilerOptions"] && raw["compilerOptions"]["outDir"];
                 if (outDir) {
                     excludeSpecs.push(outDir);
                 }
@@ -944,13 +1479,261 @@ namespace ts {
                 includeSpecs = ["**/*"];
             }
 
-            return matchFileNames(fileNames, includeSpecs, excludeSpecs, basePath, options, host, errors);
+            const result = matchFileNames(fileNames, includeSpecs, excludeSpecs, basePath, options, host, errors, extraFileExtensions, sourceFile);
+
+            if (result.fileNames.length === 0 && !hasProperty(raw, "files") && resolutionStack.length === 0) {
+                errors.push(
+                    createCompilerDiagnostic(
+                        Diagnostics.No_inputs_were_found_in_config_file_0_Specified_include_paths_were_1_and_exclude_paths_were_2,
+                        configFileName || "tsconfig.json",
+                        JSON.stringify(includeSpecs || []),
+                        JSON.stringify(excludeSpecs || [])));
+            }
+
+            return result;
+        }
+
+        function createCompilerDiagnosticOnlyIfJson(message: DiagnosticMessage, arg0?: string, arg1?: string) {
+            if (!sourceFile) {
+                errors.push(createCompilerDiagnostic(message, arg0, arg1));
+            }
+        }
+    }
+
+    interface ParsedTsconfig {
+        raw: any;
+        options?: CompilerOptions;
+        typeAcquisition?: TypeAcquisition;
+        extendedConfigPath?: Path;
+    }
+
+    function isSuccessfulParsedTsconfig(value: ParsedTsconfig) {
+        return !!value.options;
+    }
+
+    /**
+     * This *just* extracts options/include/exclude/files out of a config file.
+     * It does *not* resolve the included files.
+     */
+    function parseConfig(
+            json: any,
+            sourceFile: JsonSourceFile,
+            host: ParseConfigHost,
+            basePath: string,
+            configFileName: string,
+            resolutionStack: Path[],
+            errors: Diagnostic[],
+    ): ParsedTsconfig {
+        basePath = normalizeSlashes(basePath);
+        const getCanonicalFileName = createGetCanonicalFileName(host.useCaseSensitiveFileNames);
+        const resolvedPath = toPath(configFileName || "", basePath, getCanonicalFileName);
+
+        if (resolutionStack.indexOf(resolvedPath) >= 0) {
+            errors.push(createCompilerDiagnostic(Diagnostics.Circularity_detected_while_resolving_configuration_Colon_0, [...resolutionStack, resolvedPath].join(" -> ")));
+            return { raw: json || convertToObject(sourceFile, errors) };
+        }
+
+        const ownConfig = json ?
+            parseOwnConfigOfJson(json, host, basePath, getCanonicalFileName, configFileName, errors) :
+            parseOwnConfigOfJsonSourceFile(sourceFile, host, basePath, getCanonicalFileName, configFileName, errors);
+
+        if (ownConfig.extendedConfigPath) {
+            // copy the resolution stack so it is never reused between branches in potential diamond-problem scenarios.
+            resolutionStack = resolutionStack.concat([resolvedPath]);
+            const extendedConfig = getExtendedConfig(sourceFile, ownConfig.extendedConfigPath, host, basePath, getCanonicalFileName,
+                resolutionStack, errors);
+            if (extendedConfig && isSuccessfulParsedTsconfig(extendedConfig)) {
+                const baseRaw = extendedConfig.raw;
+                const raw = ownConfig.raw;
+                const setPropertyInRawIfNotUndefined = (propertyName: string) => {
+                    const value = raw[propertyName] || baseRaw[propertyName];
+                    if (value) {
+                        raw[propertyName] = value;
+                    }
+                };
+                setPropertyInRawIfNotUndefined("include");
+                setPropertyInRawIfNotUndefined("exclude");
+                setPropertyInRawIfNotUndefined("files");
+                if (raw.compileOnSave === undefined) {
+                    raw.compileOnSave = baseRaw.compileOnSave;
+                }
+                ownConfig.options = assign({}, extendedConfig.options, ownConfig.options);
+                // TODO extend type typeAcquisition
+            }
+        }
+
+        return ownConfig;
+    }
+
+    function parseOwnConfigOfJson(
+        json: any,
+        host: ParseConfigHost,
+        basePath: string,
+        getCanonicalFileName: (fileName: string) => string,
+        configFileName: string,
+        errors: Diagnostic[]
+    ): ParsedTsconfig {
+        if (hasProperty(json, "excludes")) {
+            errors.push(createCompilerDiagnostic(Diagnostics.Unknown_option_excludes_Did_you_mean_exclude));
+        }
+
+        const options = convertCompilerOptionsFromJsonWorker(json.compilerOptions, basePath, errors, configFileName);
+        // typingOptions has been deprecated and is only supported for backward compatibility purposes.
+        // It should be removed in future releases - use typeAcquisition instead.
+        const typeAcquisition = convertTypeAcquisitionFromJsonWorker(json["typeAcquisition"] || json["typingOptions"], basePath, errors, configFileName);
+        json.compileOnSave = convertCompileOnSaveOptionFromJson(json, basePath, errors);
+        let extendedConfigPath: Path;
+
+        if (json.extends) {
+            if (typeof json.extends !== "string") {
+                errors.push(createCompilerDiagnostic(Diagnostics.Compiler_option_0_requires_a_value_of_type_1, "extends", "string"));
+            }
+            else {
+                extendedConfigPath = getExtendsConfigPath(json.extends, host, basePath, getCanonicalFileName, errors, createCompilerDiagnostic);
+            }
+        }
+        return { raw: json, options, typeAcquisition, extendedConfigPath };
+    }
+
+    function parseOwnConfigOfJsonSourceFile(
+        sourceFile: JsonSourceFile,
+        host: ParseConfigHost,
+        basePath: string,
+        getCanonicalFileName: (fileName: string) => string,
+        configFileName: string,
+        errors: Diagnostic[]
+    ): ParsedTsconfig {
+        const options = getDefaultCompilerOptions(configFileName);
+        let typeAcquisition: TypeAcquisition, typingOptionstypeAcquisition: TypeAcquisition;
+        let extendedConfigPath: Path;
+
+        const optionsIterator: JsonConversionNotifier = {
+            onSetValidOptionKeyValueInParent(parentOption: string, option: CommandLineOption, value: CompilerOptionsValue) {
+                Debug.assert(parentOption === "compilerOptions" || parentOption === "typeAcquisition" || parentOption === "typingOptions");
+                const currentOption = parentOption === "compilerOptions" ?
+                    options :
+                    parentOption === "typeAcquisition" ?
+                        (typeAcquisition || (typeAcquisition = getDefaultTypeAcquisition(configFileName))) :
+                        (typingOptionstypeAcquisition || (typingOptionstypeAcquisition = getDefaultTypeAcquisition(configFileName)));
+
+                currentOption[option.name] = normalizeOptionValue(option, basePath, value);
+            },
+            onSetValidOptionKeyValueInRoot(key: string, _keyNode: PropertyName, value: CompilerOptionsValue, valueNode: Expression) {
+                switch (key) {
+                    case "extends":
+                        extendedConfigPath = getExtendsConfigPath(
+                            <string>value,
+                            host,
+                            basePath,
+                            getCanonicalFileName,
+                            errors,
+                            (message, arg0) =>
+                                createDiagnosticForNodeInSourceFile(sourceFile, valueNode, message, arg0)
+                        );
+                        return;
+                    case "files":
+                        if ((<string[]>value).length === 0) {
+                            errors.push(createDiagnosticForNodeInSourceFile(sourceFile, valueNode, Diagnostics.The_files_list_in_config_file_0_is_empty, configFileName || "tsconfig.json"));
+                        }
+                        return;
+                }
+            },
+            onSetUnknownOptionKeyValueInRoot(key: string, keyNode: PropertyName, _value: CompilerOptionsValue, _valueNode: Expression) {
+                if (key === "excludes") {
+                    errors.push(createDiagnosticForNodeInSourceFile(sourceFile, keyNode, Diagnostics.Unknown_option_excludes_Did_you_mean_exclude));
+                }
+            }
+        };
+        const json = convertToObjectWorker(sourceFile, errors, getTsconfigRootOptionsMap(), optionsIterator);
+        if (!typeAcquisition) {
+            if (typingOptionstypeAcquisition) {
+                typeAcquisition = (typingOptionstypeAcquisition.enableAutoDiscovery !== undefined) ?
+                    {
+                        enable: typingOptionstypeAcquisition.enableAutoDiscovery,
+                        include: typingOptionstypeAcquisition.include,
+                        exclude: typingOptionstypeAcquisition.exclude
+                    } :
+                    typingOptionstypeAcquisition;
+            }
+            else {
+                typeAcquisition = getDefaultTypeAcquisition(configFileName);
+            }
+        }
+
+        return { raw: json, options, typeAcquisition, extendedConfigPath };
+    }
+
+    function getExtendsConfigPath(
+        extendedConfig: string,
+        host: ParseConfigHost,
+        basePath: string,
+        getCanonicalFileName: (fileName: string) => string,
+        errors: Diagnostic[],
+        createDiagnostic: (message: DiagnosticMessage, arg1?: string) => Diagnostic) {
+        extendedConfig = normalizeSlashes(extendedConfig);
+        // If the path isn't a rooted or relative path, don't try to resolve it (we reserve the right to special case module-id like paths in the future)
+        if (!(isRootedDiskPath(extendedConfig) || startsWith(extendedConfig, "./") || startsWith(extendedConfig, "../"))) {
+            errors.push(createDiagnostic(Diagnostics.A_path_in_an_extends_option_must_be_relative_or_rooted_but_0_is_not, extendedConfig));
+            return undefined;
+        }
+        let extendedConfigPath = toPath(extendedConfig, basePath, getCanonicalFileName);
+        if (!host.fileExists(extendedConfigPath) && !endsWith(extendedConfigPath, ".json")) {
+            extendedConfigPath = `${extendedConfigPath}.json` as Path;
+            if (!host.fileExists(extendedConfigPath)) {
+                errors.push(createDiagnostic(Diagnostics.File_0_does_not_exist, extendedConfig));
+                return undefined;
+            }
+        }
+        return extendedConfigPath;
+    }
+
+    function getExtendedConfig(
+        sourceFile: JsonSourceFile,
+        extendedConfigPath: Path,
+        host: ts.ParseConfigHost,
+        basePath: string,
+        getCanonicalFileName: (fileName: string) => string,
+        resolutionStack: Path[],
+        errors: Diagnostic[],
+    ): ParsedTsconfig | undefined {
+        const extendedResult = readJsonConfigFile(extendedConfigPath, path => host.readFile(path));
+        if (sourceFile) {
+            (sourceFile.extendedSourceFiles || (sourceFile.extendedSourceFiles = [])).push(extendedResult.fileName);
+        }
+        if (extendedResult.parseDiagnostics.length) {
+            errors.push(...extendedResult.parseDiagnostics);
+            return undefined;
+        }
+
+        const extendedDirname = getDirectoryPath(extendedConfigPath);
+        const extendedConfig = parseConfig(/*json*/ undefined, extendedResult, host, extendedDirname,
+            getBaseFileName(extendedConfigPath), resolutionStack, errors);
+        if (sourceFile) {
+            sourceFile.extendedSourceFiles.push(...extendedResult.extendedSourceFiles);
+        }
+
+        if (isSuccessfulParsedTsconfig(extendedConfig)) {
+            // Update the paths to reflect base path
+            const relativeDifference = convertToRelativePath(extendedDirname, basePath, getCanonicalFileName);
+            const updatePath = (path: string) => isRootedDiskPath(path) ? path : combinePaths(relativeDifference, path);
+            const mapPropertiesInRawIfNotUndefined = (propertyName: string) => {
+                if (raw[propertyName]) {
+                    raw[propertyName] = map(raw[propertyName], updatePath);
+                }
+            };
+
+            const { raw } = extendedConfig;
+            mapPropertiesInRawIfNotUndefined("include");
+            mapPropertiesInRawIfNotUndefined("exclude");
+            mapPropertiesInRawIfNotUndefined("files");
         }
+
+        return extendedConfig;
     }
 
-    export function convertCompileOnSaveOptionFromJson(jsonOption: any, basePath: string, errors: Diagnostic[]): boolean {
+    function convertCompileOnSaveOptionFromJson(jsonOption: any, basePath: string, errors: Diagnostic[]): boolean {
         if (!hasProperty(jsonOption, compileOnSaveCommandLineOption.name)) {
-            return false;
+            return undefined;
         }
         const result = convertJsonOption(compileOnSaveCommandLineOption, jsonOption["compileOnSave"], basePath, errors);
         if (typeof result === "boolean" && result) {
@@ -965,44 +1748,54 @@ namespace ts {
         return { options, errors };
     }
 
-    export function convertTypingOptionsFromJson(jsonOptions: any, basePath: string, configFileName?: string): { options: TypingOptions, errors: Diagnostic[] } {
+    export function convertTypeAcquisitionFromJson(jsonOptions: any, basePath: string, configFileName?: string): { options: TypeAcquisition, errors: Diagnostic[] } {
         const errors: Diagnostic[] = [];
-        const options = convertTypingOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName);
+        const options = convertTypeAcquisitionFromJsonWorker(jsonOptions, basePath, errors, configFileName);
         return { options, errors };
     }
 
+    function getDefaultCompilerOptions(configFileName?: string) {
+        const options: CompilerOptions = getBaseFileName(configFileName) === "jsconfig.json"
+            ? { allowJs: true, maxNodeModuleJsDepth: 2, allowSyntheticDefaultImports: true, skipLibCheck: true }
+            : {};
+        return options;
+    }
+
     function convertCompilerOptionsFromJsonWorker(jsonOptions: any,
         basePath: string, errors: Diagnostic[], configFileName?: string): CompilerOptions {
 
-        const options: CompilerOptions = getBaseFileName(configFileName) === "jsconfig.json"
-            ? { allowJs: true, maxNodeModuleJsDepth: 2, allowSyntheticDefaultImports: true }
-            : {};
+        const options = getDefaultCompilerOptions(configFileName);
         convertOptionsFromJson(optionDeclarations, jsonOptions, basePath, options, Diagnostics.Unknown_compiler_option_0, errors);
         return options;
     }
 
-    function convertTypingOptionsFromJsonWorker(jsonOptions: any,
-        basePath: string, errors: Diagnostic[], configFileName?: string): TypingOptions {
+    function getDefaultTypeAcquisition(configFileName?: string) {
+        const options: TypeAcquisition = { enable: getBaseFileName(configFileName) === "jsconfig.json", include: [], exclude: [] };
+        return options;
+    }
+
+    function convertTypeAcquisitionFromJsonWorker(jsonOptions: any,
+        basePath: string, errors: Diagnostic[], configFileName?: string): TypeAcquisition {
+
+        const options = getDefaultTypeAcquisition(configFileName);
+        const typeAcquisition = convertEnableAutoDiscoveryToEnable(jsonOptions);
+        convertOptionsFromJson(typeAcquisitionDeclarations, typeAcquisition, basePath, options, Diagnostics.Unknown_type_acquisition_option_0, errors);
 
-        const options: TypingOptions = getBaseFileName(configFileName) === "jsconfig.json"
-            ? { enableAutoDiscovery: true, include: [], exclude: [] }
-            : { enableAutoDiscovery: false, include: [], exclude: [] };
-        convertOptionsFromJson(typingOptionDeclarations, jsonOptions, basePath, options, Diagnostics.Unknown_typing_option_0, errors);
         return options;
     }
 
     function convertOptionsFromJson(optionDeclarations: CommandLineOption[], jsonOptions: any, basePath: string,
-        defaultOptions: CompilerOptions | TypingOptions, diagnosticMessage: DiagnosticMessage, errors: Diagnostic[]) {
+        defaultOptions: CompilerOptions | TypeAcquisition, diagnosticMessage: DiagnosticMessage, errors: Diagnostic[]) {
 
         if (!jsonOptions) {
             return;
         }
 
-        const optionNameMap = arrayToMap(optionDeclarations, opt => opt.name);
+        const optionNameMap = commandLineOptionsToMap(optionDeclarations);
 
         for (const id in jsonOptions) {
-            if (id in optionNameMap) {
-                const opt = optionNameMap[id];
+            const opt = optionNameMap.get(id);
+            if (opt) {
                 defaultOptions[opt.name] = convertJsonOption(opt, jsonOptions[id], basePath, errors);
             }
             else {
@@ -1012,34 +1805,50 @@ namespace ts {
     }
 
     function convertJsonOption(opt: CommandLineOption, value: any, basePath: string, errors: Diagnostic[]): CompilerOptionsValue {
-        const optType = opt.type;
-        const expectedType = typeof optType === "string" ? optType : "string";
-        if (optType === "list" && isArray(value)) {
-            return convertJsonOptionOfListType(<CommandLineOptionOfListType>opt, value, basePath, errors);
-        }
-        else if (typeof value === expectedType) {
-            if (typeof optType !== "string") {
-                return convertJsonOptionOfCustomType(<CommandLineOptionOfCustomType>opt, value, errors);
+        if (isCompilerOptionsValue(opt, value)) {
+            const optType = opt.type;
+            if (optType === "list" && isArray(value)) {
+                return convertJsonOptionOfListType(<CommandLineOptionOfListType>opt, value, basePath, errors);
             }
-            else {
-                if (opt.isFilePath) {
-                    value = normalizePath(combinePaths(basePath, value));
-                    if (value === "") {
-                        value = ".";
-                    }
-                }
+            else if (typeof optType !== "string") {
+                return convertJsonOptionOfCustomType(<CommandLineOptionOfCustomType>opt, <string>value, errors);
             }
-            return value;
+            return normalizeNonListOptionValue(opt, basePath, value);
         }
         else {
-            errors.push(createCompilerDiagnostic(Diagnostics.Compiler_option_0_requires_a_value_of_type_1, opt.name, expectedType));
+            errors.push(createCompilerDiagnostic(Diagnostics.Compiler_option_0_requires_a_value_of_type_1, opt.name, getCompilerOptionValueTypeString(opt)));
+        }
+    }
+
+    function normalizeOptionValue(option: CommandLineOption, basePath: string, value: any): CompilerOptionsValue {
+        if (option.type === "list") {
+            const listOption = <CommandLineOptionOfListType>option;
+            if (listOption.element.isFilePath || typeof listOption.element.type !== "string") {
+                return <CompilerOptionsValue>filter(map(value, v => normalizeOptionValue(listOption.element, basePath, v)), v => !!v);
+            }
+            return value;
+        }
+        else if (typeof option.type !== "string") {
+            return option.type.get(value);
+        }
+        return normalizeNonListOptionValue(option, basePath, value);
+    }
+
+    function normalizeNonListOptionValue(option: CommandLineOption, basePath: string, value: any): CompilerOptionsValue  {
+        if (option.isFilePath) {
+            value = normalizePath(combinePaths(basePath, value));
+            if (value === "") {
+                value = ".";
+            }
         }
+        return value;
     }
 
     function convertJsonOptionOfCustomType(opt: CommandLineOptionOfCustomType, value: string, errors: Diagnostic[]) {
         const key = value.toLowerCase();
-        if (key in opt.type) {
-            return opt.type[key];
+        const val = opt.type.get(key);
+        if (val !== undefined) {
+            return val;
         }
         else {
             errors.push(createCompilerDiagnosticForInvalidCustomType(opt));
@@ -1137,7 +1946,7 @@ namespace ts {
      * @param host The host used to resolve files and directories.
      * @param errors An array for diagnostic reporting.
      */
-    function matchFileNames(fileNames: string[], include: string[], exclude: string[], basePath: string, options: CompilerOptions, host: ParseConfigHost, errors: Diagnostic[]): ExpandResult {
+    function matchFileNames(fileNames: string[], include: string[], exclude: string[], basePath: string, options: CompilerOptions, host: ParseConfigHost, errors: Diagnostic[], extraFileExtensions: JsFileExtensionInfo[], jsonSourceFile: JsonSourceFile): ExpandResult {
         basePath = normalizePath(basePath);
 
         // The exclude spec list is converted into a regular expression, which allows us to quickly
@@ -1156,29 +1965,29 @@ namespace ts {
         const wildcardFileMap = createMap<string>();
 
         if (include) {
-            include = validateSpecs(include, errors, /*allowTrailingRecursion*/ false);
+            include = validateSpecs(include, errors, /*allowTrailingRecursion*/ false, jsonSourceFile, "include");
         }
 
         if (exclude) {
-            exclude = validateSpecs(exclude, errors, /*allowTrailingRecursion*/ true);
+            exclude = validateSpecs(exclude, errors, /*allowTrailingRecursion*/ true, jsonSourceFile, "exclude");
         }
 
         // Wildcard directories (provided as part of a wildcard path) are stored in a
         // file map that marks whether it was a regular wildcard match (with a `*` or `?` token),
         // or a recursive directory. This information is used by filesystem watchers to monitor for
         // new entries in these paths.
-        const wildcardDirectories: Map<WatchDirectoryFlags> = getWildcardDirectories(include, exclude, basePath, host.useCaseSensitiveFileNames);
+        const wildcardDirectories = getWildcardDirectories(include, exclude, basePath, host.useCaseSensitiveFileNames);
 
         // Rather than requery this for each file and filespec, we query the supported extensions
         // once and store it on the expansion context.
-        const supportedExtensions = getSupportedExtensions(options);
+        const supportedExtensions = getSupportedExtensions(options, extraFileExtensions);
 
         // Literal files are always included verbatim. An "include" or "exclude" specification cannot
         // remove a literal file.
         if (fileNames) {
             for (const fileName of fileNames) {
                 const file = combinePaths(basePath, fileName);
-                literalFileMap[keyMapper(file)] = file;
+                literalFileMap.set(keyMapper(file), file);
             }
         }
 
@@ -1201,32 +2010,31 @@ namespace ts {
                 removeWildcardFilesWithLowerPriorityExtension(file, wildcardFileMap, supportedExtensions, keyMapper);
 
                 const key = keyMapper(file);
-                if (!(key in literalFileMap) && !(key in wildcardFileMap)) {
-                    wildcardFileMap[key] = file;
+                if (!literalFileMap.has(key) && !wildcardFileMap.has(key)) {
+                    wildcardFileMap.set(key, file);
                 }
             }
         }
 
-        const literalFiles = reduceProperties(literalFileMap, addFileToOutput, []);
-        const wildcardFiles = reduceProperties(wildcardFileMap, addFileToOutput, []);
-        wildcardFiles.sort(host.useCaseSensitiveFileNames ? compareStrings : compareStringsCaseInsensitive);
+        const literalFiles = arrayFrom(literalFileMap.values());
+        const wildcardFiles = arrayFrom(wildcardFileMap.values());
         return {
             fileNames: literalFiles.concat(wildcardFiles),
             wildcardDirectories
         };
     }
 
-    function validateSpecs(specs: string[], errors: Diagnostic[], allowTrailingRecursion: boolean) {
+    function validateSpecs(specs: string[], errors: Diagnostic[], allowTrailingRecursion: boolean, jsonSourceFile: JsonSourceFile, specKey: string) {
         const validSpecs: string[] = [];
         for (const spec of specs) {
             if (!allowTrailingRecursion && invalidTrailingRecursionPattern.test(spec)) {
-                errors.push(createCompilerDiagnostic(Diagnostics.File_specification_cannot_end_in_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0, spec));
+                errors.push(createDiagnostic(Diagnostics.File_specification_cannot_end_in_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0, spec));
             }
             else if (invalidMultipleRecursionPatterns.test(spec)) {
-                errors.push(createCompilerDiagnostic(Diagnostics.File_specification_cannot_contain_multiple_recursive_directory_wildcards_Asterisk_Asterisk_Colon_0, spec));
+                errors.push(createDiagnostic(Diagnostics.File_specification_cannot_contain_multiple_recursive_directory_wildcards_Asterisk_Asterisk_Colon_0, spec));
             }
             else if (invalidDotDotAfterRecursiveWildcardPattern.test(spec)) {
-                errors.push(createCompilerDiagnostic(Diagnostics.File_specification_cannot_contain_a_parent_directory_that_appears_after_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0, spec));
+                errors.push(createDiagnostic(Diagnostics.File_specification_cannot_contain_a_parent_directory_that_appears_after_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0, spec));
             }
             else {
                 validSpecs.push(spec);
@@ -1234,17 +2042,33 @@ namespace ts {
         }
 
         return validSpecs;
+
+        function createDiagnostic(message: DiagnosticMessage, spec: string): Diagnostic {
+            if (jsonSourceFile && jsonSourceFile.jsonObject) {
+                for (const property of getPropertyAssignment(jsonSourceFile.jsonObject, specKey)) {
+                    if (isArrayLiteralExpression(property.initializer)) {
+                        for (const element of property.initializer.elements) {
+                            if (element.kind === SyntaxKind.StringLiteral && (<StringLiteral>element).text === spec) {
+                                return createDiagnosticForNodeInSourceFile(jsonSourceFile, element, message, spec);
+                            }
+                        }
+                    }
+                }
+            }
+            return createCompilerDiagnostic(message, spec);
+        }
     }
 
     /**
      * Gets directories in a set of include patterns that should be watched for changes.
      */
-    function getWildcardDirectories(include: string[], exclude: string[], path: string, useCaseSensitiveFileNames: boolean) {
+    function getWildcardDirectories(include: string[], exclude: string[], path: string, useCaseSensitiveFileNames: boolean): MapLike<WatchDirectoryFlags> {
         // We watch a directory recursively if it contains a wildcard anywhere in a directory segment
         // of the pattern:
         //
         //  /a/b/**/d   - Watch /a/b recursively to catch changes to any d in any subfolder recursively
         //  /a/b/*/d    - Watch /a/b recursively to catch any d in any immediate subfolder, even if a new subfolder is added
+        //  /a/b        - Watch /a/b recursively to catch changes to anything in any recursive subfoler
         //
         // We watch a directory without recursion if it contains a wildcard in the file segment of
         // the pattern:
@@ -1253,19 +2077,18 @@ namespace ts {
         //  /a/b/a?z    - Watch /a/b directly to catch any new file matching a?z
         const rawExcludeRegex = getRegularExpressionForWildcard(exclude, path, "exclude");
         const excludeRegex = rawExcludeRegex && new RegExp(rawExcludeRegex, useCaseSensitiveFileNames ? "" : "i");
-        const wildcardDirectories = createMap<WatchDirectoryFlags>();
+        const wildcardDirectories: ts.MapLike<WatchDirectoryFlags> = {};
         if (include !== undefined) {
             const recursiveKeys: string[] = [];
             for (const file of include) {
-                const name = normalizePath(combinePaths(path, file));
-                if (excludeRegex && excludeRegex.test(name)) {
+                const spec = normalizePath(combinePaths(path, file));
+                if (excludeRegex && excludeRegex.test(spec)) {
                     continue;
                 }
 
-                const match = wildcardDirectoryPattern.exec(name);
+                const match = getWildcardDirectoryFromSpec(spec, useCaseSensitiveFileNames);
                 if (match) {
-                    const key = useCaseSensitiveFileNames ? match[0] : match[0].toLowerCase();
-                    const flags = watchRecursivePattern.test(name) ? WatchDirectoryFlags.Recursive : WatchDirectoryFlags.None;
+                    const { key, flags } = match;
                     const existingFlags = wildcardDirectories[key];
                     if (existingFlags === undefined || existingFlags < flags) {
                         wildcardDirectories[key] = flags;
@@ -1278,9 +2101,11 @@ namespace ts {
 
             // Remove any subpaths under an existing recursively watched directory.
             for (const key in wildcardDirectories) {
-                for (const recursiveKey of recursiveKeys) {
-                    if (key !== recursiveKey && containsPath(recursiveKey, key, path, !useCaseSensitiveFileNames)) {
-                        delete wildcardDirectories[key];
+                if (hasProperty(wildcardDirectories, key)) {
+                    for (const recursiveKey of recursiveKeys) {
+                        if (key !== recursiveKey && containsPath(recursiveKey, key, path, !useCaseSensitiveFileNames)) {
+                            delete wildcardDirectories[key];
+                        }
                     }
                 }
             }
@@ -1289,6 +2114,20 @@ namespace ts {
         return wildcardDirectories;
     }
 
+    function getWildcardDirectoryFromSpec(spec: string, useCaseSensitiveFileNames: boolean): { key: string, flags: WatchDirectoryFlags } | undefined {
+        const match = wildcardDirectoryPattern.exec(spec);
+        if (match) {
+            return {
+                key: useCaseSensitiveFileNames ? match[0] : match[0].toLowerCase(),
+                flags: watchRecursivePattern.test(spec) ? WatchDirectoryFlags.Recursive : WatchDirectoryFlags.None
+            };
+        }
+        if (isImplicitGlob(spec)) {
+            return { key: spec, flags: WatchDirectoryFlags.Recursive };
+        }
+        return undefined;
+    }
+
     /**
      * Determines whether a literal or wildcard file has already been included that has a higher
      * extension priority.
@@ -1299,11 +2138,11 @@ namespace ts {
      */
     function hasFileWithHigherPriorityExtension(file: string, literalFiles: Map<string>, wildcardFiles: Map<string>, extensions: string[], keyMapper: (value: string) => string) {
         const extensionPriority = getExtensionPriority(file, extensions);
-        const adjustedExtensionPriority = adjustExtensionPriority(extensionPriority);
+        const adjustedExtensionPriority = adjustExtensionPriority(extensionPriority, extensions);
         for (let i = ExtensionPriority.Highest; i < adjustedExtensionPriority; i++) {
             const higherPriorityExtension = extensions[i];
             const higherPriorityPath = keyMapper(changeExtension(file, higherPriorityExtension));
-            if (higherPriorityPath in literalFiles || higherPriorityPath in wildcardFiles) {
+            if (literalFiles.has(higherPriorityPath) || wildcardFiles.has(higherPriorityPath)) {
                 return true;
             }
         }
@@ -1321,25 +2160,14 @@ namespace ts {
      */
     function removeWildcardFilesWithLowerPriorityExtension(file: string, wildcardFiles: Map<string>, extensions: string[], keyMapper: (value: string) => string) {
         const extensionPriority = getExtensionPriority(file, extensions);
-        const nextExtensionPriority = getNextLowestExtensionPriority(extensionPriority);
+        const nextExtensionPriority = getNextLowestExtensionPriority(extensionPriority, extensions);
         for (let i = nextExtensionPriority; i < extensions.length; i++) {
             const lowerPriorityExtension = extensions[i];
             const lowerPriorityPath = keyMapper(changeExtension(file, lowerPriorityExtension));
-            delete wildcardFiles[lowerPriorityPath];
+            wildcardFiles.delete(lowerPriorityPath);
         }
     }
 
-    /**
-     * Adds a file to an array of files.
-     *
-     * @param output The output array.
-     * @param file The file path.
-     */
-    function addFileToOutput(output: string[], file: string) {
-        output.push(file);
-        return output;
-    }
-
     /**
      * Gets a case sensitive key.
      *
@@ -1357,4 +2185,44 @@ namespace ts {
     function caseInsensitiveKeyMapper(key: string) {
         return key.toLowerCase();
     }
+
+    /**
+     * Produces a cleaned version of compiler options with personally identifiying info (aka, paths) removed.
+     * Also converts enum values back to strings.
+     */
+    /* @internal */
+    export function convertCompilerOptionsForTelemetry(opts: ts.CompilerOptions): ts.CompilerOptions {
+        const out: ts.CompilerOptions = {};
+        for (const key in opts) {
+            if (opts.hasOwnProperty(key)) {
+                const type = getOptionFromName(key);
+                if (type !== undefined) { // Ignore unknown options
+                    out[key] = getOptionValueWithEmptyStrings(opts[key], type);
+                }
+            }
+        }
+        return out;
+    }
+
+    function getOptionValueWithEmptyStrings(value: any, option: CommandLineOption): {} {
+        switch (option.type) {
+            case "object": // "paths". Can't get any useful information from the value since we blank out strings, so just return "".
+                return "";
+            case "string": // Could be any arbitrary string -- use empty string instead.
+                return "";
+            case "number": // Allow numbers, but be sure to check it's actually a number.
+                return typeof value === "number" ? value : "";
+            case "boolean":
+                return typeof value === "boolean" ? value : "";
+            case "list":
+                const elementType = (option as CommandLineOptionOfListType).element;
+                return ts.isArray(value) ? value.map(v => getOptionValueWithEmptyStrings(v, elementType)) : "";
+            default:
+                return ts.forEachEntry(option.type, (optionEnumValue, optionStringValue) => {
+                    if (optionEnumValue === value) {
+                        return optionStringValue;
+                    }
+                });
+        }
+    }
 }
diff --git a/src/compiler/comments.ts b/src/compiler/comments.ts
index 116a8e8..0628530 100644
--- a/src/compiler/comments.ts
+++ b/src/compiler/comments.ts
@@ -5,17 +5,17 @@ namespace ts {
     export interface CommentWriter {
         reset(): void;
         setSourceFile(sourceFile: SourceFile): void;
-        emitNodeWithComments(emitContext: EmitContext, node: Node, emitCallback: (emitContext: EmitContext, node: Node) => void): void;
+        setWriter(writer: EmitTextWriter): void;
+        emitNodeWithComments(hint: EmitHint, node: Node, emitCallback: (hint: EmitHint, node: Node) => void): void;
         emitBodyWithDetachedComments(node: Node, detachedRange: TextRange, emitCallback: (node: Node) => void): void;
         emitTrailingCommentsOfPosition(pos: number): void;
+        emitLeadingCommentsOfPosition(pos: number): void;
     }
 
-    export function createCommentWriter(host: EmitHost, writer: EmitTextWriter, sourceMap: SourceMapWriter): CommentWriter {
-        const compilerOptions = host.getCompilerOptions();
-        const extendedDiagnostics = compilerOptions.extendedDiagnostics;
-        const newLine = host.getNewLine();
-        const { emitPos } = sourceMap;
-
+    export function createCommentWriter(printerOptions: PrinterOptions, emitPos: ((pos: number) => void) | undefined): CommentWriter {
+        const extendedDiagnostics = printerOptions.extendedDiagnostics;
+        const newLine = getNewLineCharacter(printerOptions);
+        let writer: EmitTextWriter;
         let containerPos = -1;
         let containerEnd = -1;
         let declarationListContainerEnd = -1;
@@ -24,35 +24,33 @@ namespace ts {
         let currentLineMap: number[];
         let detachedCommentsInfo: { nodePos: number, detachedCommentEndPos: number}[];
         let hasWrittenComment = false;
-        let disabled: boolean = compilerOptions.removeComments;
+        let disabled: boolean = printerOptions.removeComments;
 
         return {
             reset,
+            setWriter,
             setSourceFile,
             emitNodeWithComments,
             emitBodyWithDetachedComments,
             emitTrailingCommentsOfPosition,
+            emitLeadingCommentsOfPosition,
         };
 
-        function emitNodeWithComments(emitContext: EmitContext, node: Node, emitCallback: (emitContext: EmitContext, node: Node) => void) {
+        function emitNodeWithComments(hint: EmitHint, node: Node, emitCallback: (hint: EmitHint, node: Node) => void) {
             if (disabled) {
-                emitCallback(emitContext, node);
+                emitCallback(hint, node);
                 return;
             }
 
             if (node) {
-                const { pos, end } = getCommentRange(node);
-                const emitFlags = getEmitFlags(node);
+                hasWrittenComment = false;
+
+                const emitNode = node.emitNode;
+                const emitFlags = emitNode && emitNode.flags;
+                const { pos, end } = emitNode && emitNode.commentRange || node;
                 if ((pos < 0 && end < 0) || (pos === end)) {
                     // Both pos and end are synthesized, so just emit the node without comments.
-                    if (emitFlags & EmitFlags.NoNestedComments) {
-                        disabled = true;
-                        emitCallback(emitContext, node);
-                        disabled = false;
-                    }
-                    else {
-                        emitCallback(emitContext, node);
-                    }
+                    emitNodeWithSynthesizedComments(hint, node, emitNode, emitFlags, emitCallback);
                 }
                 else {
                     if (extendedDiagnostics) {
@@ -60,8 +58,10 @@ namespace ts {
                     }
 
                     const isEmittedNode = node.kind !== SyntaxKind.NotEmittedStatement;
-                    const skipLeadingComments = pos < 0 || (emitFlags & EmitFlags.NoLeadingComments) !== 0;
-                    const skipTrailingComments = end < 0 || (emitFlags & EmitFlags.NoTrailingComments) !== 0;
+                    // We have to explicitly check that the node is JsxText because if the compilerOptions.jsx is "preserve" we will not do any transformation.
+                    // It is expensive to walk entire tree just to set one kind of node to have no comments.
+                    const skipLeadingComments = pos < 0 || (emitFlags & EmitFlags.NoLeadingComments) !== 0 || node.kind === SyntaxKind.JsxText;
+                    const skipTrailingComments = end < 0 || (emitFlags & EmitFlags.NoTrailingComments) !== 0 || node.kind === SyntaxKind.JsxText;
 
                     // Emit leading comments if the position is not synthesized and the node
                     // has not opted out from emitting leading comments.
@@ -92,17 +92,10 @@ namespace ts {
                         performance.measure("commentTime", "preEmitNodeWithComment");
                     }
 
-                    if (emitFlags & EmitFlags.NoNestedComments) {
-                        disabled = true;
-                        emitCallback(emitContext, node);
-                        disabled = false;
-                    }
-                    else {
-                        emitCallback(emitContext, node);
-                    }
+                    emitNodeWithSynthesizedComments(hint, node, emitNode, emitFlags, emitCallback);
 
                     if (extendedDiagnostics) {
-                        performance.mark("beginEmitNodeWithComment");
+                        performance.mark("postEmitNodeWithComment");
                     }
 
                     // Restore previous container state.
@@ -117,12 +110,88 @@ namespace ts {
                     }
 
                     if (extendedDiagnostics) {
-                        performance.measure("commentTime", "beginEmitNodeWithComment");
+                        performance.measure("commentTime", "postEmitNodeWithComment");
                     }
                 }
             }
         }
 
+        function emitNodeWithSynthesizedComments(hint: EmitHint, node: Node, emitNode: EmitNode, emitFlags: EmitFlags, emitCallback: (hint: EmitHint, node: Node) => void) {
+            const leadingComments = emitNode && emitNode.leadingComments;
+            if (some(leadingComments)) {
+                if (extendedDiagnostics) {
+                    performance.mark("preEmitNodeWithSynthesizedComments");
+                }
+
+                forEach(leadingComments, emitLeadingSynthesizedComment);
+
+                if (extendedDiagnostics) {
+                    performance.measure("commentTime", "preEmitNodeWithSynthesizedComments");
+                }
+            }
+
+            emitNodeWithNestedComments(hint, node, emitFlags, emitCallback);
+
+            const trailingComments = emitNode && emitNode.trailingComments;
+            if (some(trailingComments)) {
+                if (extendedDiagnostics) {
+                    performance.mark("postEmitNodeWithSynthesizedComments");
+                }
+
+                forEach(trailingComments, emitTrailingSynthesizedComment);
+
+                if (extendedDiagnostics) {
+                    performance.measure("commentTime", "postEmitNodeWithSynthesizedComments");
+                }
+            }
+        }
+
+        function emitLeadingSynthesizedComment(comment: SynthesizedComment) {
+            if (comment.kind === SyntaxKind.SingleLineCommentTrivia) {
+                writer.writeLine();
+            }
+            writeSynthesizedComment(comment);
+            if (comment.hasTrailingNewLine || comment.kind === SyntaxKind.SingleLineCommentTrivia) {
+                writer.writeLine();
+            }
+            else {
+                writer.write(" ");
+            }
+        }
+
+        function emitTrailingSynthesizedComment(comment: SynthesizedComment) {
+            if (!writer.isAtStartOfLine()) {
+                writer.write(" ");
+            }
+            writeSynthesizedComment(comment);
+            if (comment.hasTrailingNewLine) {
+                writer.writeLine();
+            }
+        }
+
+        function writeSynthesizedComment(comment: SynthesizedComment) {
+            const text = formatSynthesizedComment(comment);
+            const lineMap = comment.kind === SyntaxKind.MultiLineCommentTrivia ? computeLineStarts(text) : undefined;
+            writeCommentRange(text, lineMap, writer, 0, text.length, newLine);
+        }
+
+        function formatSynthesizedComment(comment: SynthesizedComment) {
+            return comment.kind === SyntaxKind.MultiLineCommentTrivia
+                ? `/*${comment.text}*/`
+                : `//${comment.text}`;
+        }
+
+        function emitNodeWithNestedComments(hint: EmitHint, node: Node, emitFlags: EmitFlags, emitCallback: (hint: EmitHint, node: Node) => void) {
+            if (emitFlags & EmitFlags.NoNestedComments) {
+                disabled = true;
+                emitCallback(hint, node);
+                disabled = false;
+            }
+            else {
+                emitCallback(hint, node);
+            }
+        }
+
         function emitBodyWithDetachedComments(node: Node, detachedRange: TextRange, emitCallback: (node: Node) => void) {
             if (extendedDiagnostics) {
                 performance.mark("preEmitBodyWithDetachedComments");
@@ -156,6 +225,9 @@ namespace ts {
 
             if (!skipTrailingComments) {
                 emitLeadingComments(detachedRange.end, /*isEmittedNode*/ true);
+                if (hasWrittenComment && !writer.isAtStartOfLine()) {
+                    writer.writeLine();
+                }
             }
 
             if (extendedDiagnostics) {
@@ -188,16 +260,16 @@ namespace ts {
             }
         }
 
-        function emitLeadingComment(commentPos: number, commentEnd: number, kind: SyntaxKind, hasTrailingNewLine: boolean, rangePos: number) {
+        function emitLeadingComment(commentPos: number, commentEnd: number, _kind: SyntaxKind, hasTrailingNewLine: boolean, rangePos: number) {
             if (!hasWrittenComment) {
                 emitNewLineBeforeLeadingCommentOfPosition(currentLineMap, writer, rangePos, commentPos);
                 hasWrittenComment = true;
             }
 
             // Leading comments are emitted at /*leading comment1 */space/*leading comment*/space
-            emitPos(commentPos);
+            if (emitPos) emitPos(commentPos);
             writeCommentRange(currentText, currentLineMap, writer, commentPos, commentEnd, newLine);
-            emitPos(commentEnd);
+            if (emitPos) emitPos(commentEnd);
 
             if (hasTrailingNewLine) {
                 writer.writeLine();
@@ -207,19 +279,27 @@ namespace ts {
             }
         }
 
+        function emitLeadingCommentsOfPosition(pos: number) {
+            if (disabled || pos === -1) {
+                return;
+            }
+
+            emitLeadingComments(pos, /*isEmittedNode*/ true);
+        }
+
         function emitTrailingComments(pos: number) {
             forEachTrailingCommentToEmit(pos, emitTrailingComment);
         }
 
-        function emitTrailingComment(commentPos: number, commentEnd: number, kind: SyntaxKind, hasTrailingNewLine: boolean) {
+        function emitTrailingComment(commentPos: number, commentEnd: number, _kind: SyntaxKind, hasTrailingNewLine: boolean) {
             // trailing comments are emitted at space/*trailing comment1 */space/*trailing comment2*/
             if (!writer.isAtStartOfLine()) {
                 writer.write(" ");
             }
 
-            emitPos(commentPos);
+            if (emitPos) emitPos(commentPos);
             writeCommentRange(currentText, currentLineMap, writer, commentPos, commentEnd, newLine);
-            emitPos(commentEnd);
+            if (emitPos) emitPos(commentEnd);
 
             if (hasTrailingNewLine) {
                 writer.writeLine();
@@ -242,12 +322,12 @@ namespace ts {
             }
         }
 
-        function emitTrailingCommentOfPosition(commentPos: number, commentEnd: number, kind: SyntaxKind, hasTrailingNewLine: boolean) {
+        function emitTrailingCommentOfPosition(commentPos: number, commentEnd: number, _kind: SyntaxKind, hasTrailingNewLine: boolean) {
             // trailing comments of a position are emitted at /*trailing comment1 */space/*trailing comment*/space
 
-            emitPos(commentPos);
+            if (emitPos) emitPos(commentPos);
             writeCommentRange(currentText, currentLineMap, writer, commentPos, commentEnd, newLine);
-            emitPos(commentEnd);
+            if (emitPos) emitPos(commentEnd);
 
             if (hasTrailingNewLine) {
                 writer.writeLine();
@@ -283,6 +363,10 @@ namespace ts {
             detachedCommentsInfo = undefined;
         }
 
+        function setWriter(output: EmitTextWriter): void {
+            writer = output;
+        }
+
         function setSourceFile(sourceFile: SourceFile) {
             currentSourceFile = sourceFile;
             currentText = currentSourceFile.text;
@@ -320,16 +404,16 @@ namespace ts {
         }
 
         function writeComment(text: string, lineMap: number[], writer: EmitTextWriter, commentPos: number, commentEnd: number, newLine: string) {
-            emitPos(commentPos);
+            if (emitPos) emitPos(commentPos);
             writeCommentRange(text, lineMap, writer, commentPos, commentEnd, newLine);
-            emitPos(commentEnd);
+            if (emitPos) emitPos(commentEnd);
         }
 
         /**
          * Determine if the given comment is a triple-slash
          *
          * @return true if the comment is a triple-slash comment else false
-         **/
+         */
         function isTripleSlashComment(commentPos: number, commentEnd: number) {
             // Verify this is /// comment, but do the regexp match only when we first can find /// in the comment text
             // so that we don't end up computing comment string and doing match for all // comments
diff --git a/src/compiler/core.ts b/src/compiler/core.ts
index 4e1f455..8e5bf01 100644
--- a/src/compiler/core.ts
+++ b/src/compiler/core.ts
@@ -1,6 +1,11 @@
-/// <reference path="types.ts"/>
+/// <reference path="types.ts"/>
 /// <reference path="performance.ts" />
 
+namespace ts {
+    /** The version of the TypeScript compiler release */
+    export const version = "2.5.0";
+}
+
 /* @internal */
 namespace ts {
     /**
@@ -18,10 +23,14 @@ namespace ts {
         True = -1
     }
 
-    const createObject = Object.create;
+    // More efficient to create a collator once and use its `compare` than to call `a.localeCompare(b)` many times.
+    export const collator: { compare(a: string, b: string): number } = typeof Intl === "object" && typeof Intl.Collator === "function" ? new Intl.Collator(/*locales*/ undefined, { usage: "sort", sensitivity: "accent" }) : undefined;
+    // Intl is missing in Safari, and node 0.10 treats "a" as greater than "B".
+    export const localeCompareIsCorrect = ts.collator && ts.collator.compare("a", "B") < 0;
 
-    export function createMap<T>(template?: MapLike<T>): Map<T> {
-        const map: Map<T> = createObject(null); // tslint:disable-line:no-null-keyword
+    /** Create a MapLike with good performance. */
+    function createDictionaryObject<T>(): MapLike<T> {
+        const map = Object.create(/*prototype*/ null); // tslint:disable-line:no-null-keyword
 
         // Using 'delete' on an object causes V8 to put the object in dictionary mode.
         // This disables creation of hidden classes, which are expensive when an object is
@@ -29,17 +38,115 @@ namespace ts {
         map["__"] = undefined;
         delete map["__"];
 
+        return map;
+    }
+
+    /** Create a new map. If a template object is provided, the map will copy entries from it. */
+    export function createMap<T>(): Map<T> {
+        return new MapCtr<T>();
+    }
+
+    export function createMapFromTemplate<T>(template?: MapLike<T>): Map<T> {
+        const map: Map<T> = new MapCtr<T>();
+
         // Copies keys/values from template. Note that for..in will not throw if
         // template is undefined, and instead will just exit the loop.
-        for (const key in template) if (hasOwnProperty.call(template, key)) {
-            map[key] = template[key];
+        for (const key in template) {
+            if (hasOwnProperty.call(template, key)) {
+                map.set(key, template[key]);
+            }
         }
 
         return map;
     }
 
+    // The global Map object. This may not be available, so we must test for it.
+    declare const Map: { new<T>(): Map<T> } | undefined;
+    // Internet Explorer's Map doesn't support iteration, so don't use it.
+    // tslint:disable-next-line:no-in-operator
+    const MapCtr = typeof Map !== "undefined" && "entries" in Map.prototype ? Map : shimMap();
+
+    // Keep the class inside a function so it doesn't get compiled if it's not used.
+    function shimMap(): { new<T>(): Map<T> } {
+
+        class MapIterator<T, U extends (string | T | [string, T])> {
+            private data: MapLike<T>;
+            private keys: string[];
+            private index = 0;
+            private selector: (data: MapLike<T>, key: string) => U;
+            constructor(data: MapLike<T>, selector: (data: MapLike<T>, key: string) => U) {
+                this.data = data;
+                this.selector = selector;
+                this.keys = Object.keys(data);
+            }
+
+            public next(): { value: U, done: false } | { value: never, done: true } {
+                const index = this.index;
+                if (index < this.keys.length) {
+                    this.index++;
+                    return { value: this.selector(this.data, this.keys[index]), done: false };
+                }
+                return { value: undefined as never, done: true };
+            }
+        }
+
+        return class<T> implements Map<T> {
+            private data = createDictionaryObject<T>();
+            public size = 0;
+
+            get(key: string): T {
+                return this.data[key];
+            }
+
+            set(key: string, value: T): this {
+                if (!this.has(key)) {
+                    this.size++;
+                }
+                this.data[key] = value;
+                return this;
+            }
+
+            has(key: string): boolean {
+                // tslint:disable-next-line:no-in-operator
+                return key in this.data;
+            }
+
+            delete(key: string): boolean {
+                if (this.has(key)) {
+                    this.size--;
+                    delete this.data[key];
+                    return true;
+                }
+                return false;
+            }
+
+            clear(): void {
+                this.data = createDictionaryObject<T>();
+                this.size = 0;
+            }
+
+            keys() {
+                return new MapIterator(this.data, (_data, key) => key);
+            }
+
+            values() {
+                return new MapIterator(this.data, (data, key) => data[key]);
+            }
+
+            entries() {
+                return new MapIterator(this.data, (data, key) => [key, data[key]] as [string, T]);
+            }
+
+            forEach(action: (value: T, key: string) => void): void {
+                for (const key in this.data) {
+                    action(this.data[key], key);
+                }
+            }
+        };
+    }
+
     export function createFileMap<T>(keyMapper?: (key: string) => string): FileMap<T> {
-        let files = createMap<T>();
+        const files = createMap<T>();
         return {
             get,
             set,
@@ -51,39 +158,34 @@ namespace ts {
         };
 
         function forEachValueInMap(f: (key: Path, value: T) => void) {
-            for (const key in files) {
-                f(<Path>key, files[key]);
-            }
+            files.forEach((file, key) => {
+                f(<Path>key, file);
+            });
         }
 
         function getKeys() {
-            const keys: Path[] = [];
-            for (const key in files) {
-                keys.push(<Path>key);
-            }
-            return keys;
+            return arrayFrom(files.keys()) as Path[];
         }
 
         // path should already be well-formed so it does not need to be normalized
         function get(path: Path): T {
-            return files[toKey(path)];
+            return files.get(toKey(path));
         }
 
         function set(path: Path, value: T) {
-            files[toKey(path)] = value;
+            files.set(toKey(path), value);
         }
 
         function contains(path: Path) {
-            return toKey(path) in files;
+            return files.has(toKey(path));
         }
 
         function remove(path: Path) {
-            const key = toKey(path);
-            delete files[key];
+            files.delete(toKey(path));
         }
 
         function clear() {
-            files = createMap<T>();
+            files.clear();
         }
 
         function toKey(path: Path): string {
@@ -104,6 +206,10 @@ namespace ts {
         GreaterThan = 1
     }
 
+    export function length(array: any[]) {
+        return array ? array.length : 0;
+    }
+
     /**
      * Iterates through 'array' by index and performs the callback on each element of array until the callback
      * returns a truthy value, then returns that value.
@@ -111,7 +217,7 @@ namespace ts {
      */
     export function forEach<T, U>(array: T[] | undefined, callback: (element: T, index: number) => U | undefined): U | undefined {
         if (array) {
-            for (let i = 0, len = array.length; i < len; i++) {
+            for (let i = 0; i < array.length; i++) {
                 const result = callback(array[i], i);
                 if (result) {
                     return result;
@@ -120,6 +226,43 @@ namespace ts {
         }
         return undefined;
     }
+    /**
+     * Iterates through the parent chain of a node and performs the callback on each parent until the callback
+     * returns a truthy value, then returns that value.
+     * If no such value is found, it applies the callback until the parent pointer is undefined or the callback returns "quit"
+     * At that point findAncestor returns undefined.
+     */
+    export function findAncestor<T extends Node>(node: Node, callback: (element: Node) => element is T): T | undefined;
+    export function findAncestor(node: Node, callback: (element: Node) => boolean | "quit"): Node | undefined;
+    export function findAncestor(node: Node, callback: (element: Node) => boolean | "quit"): Node {
+        while (node) {
+            const result = callback(node);
+            if (result === "quit") {
+                return undefined;
+            }
+            else if (result) {
+                return node;
+            }
+            node = node.parent;
+        }
+        return undefined;
+    }
+
+    export function zipWith<T, U>(arrayA: T[], arrayB: U[], callback: (a: T, b: U, index: number) => void): void {
+        Debug.assert(arrayA.length === arrayB.length);
+        for (let i = 0; i < arrayA.length; i++) {
+            callback(arrayA[i], arrayB[i], i);
+        }
+    }
+
+    export function zipToMap<T>(keys: string[], values: T[]): Map<T> {
+        Debug.assert(keys.length === values.length);
+        const map = createMap<T>();
+        for (let i = 0; i < keys.length; ++i) {
+            map.set(keys[i], values[i]);
+        }
+        return map;
+    }
 
     /**
      * Iterates through `array` by index and performs the callback on each element of array until the callback
@@ -128,7 +271,7 @@ namespace ts {
      */
     export function every<T>(array: T[], callback: (element: T, index: number) => boolean): boolean {
         if (array) {
-            for (let i = 0, len = array.length; i < len; i++) {
+            for (let i = 0; i < array.length; i++) {
                 if (!callback(array[i], i)) {
                     return false;
                 }
@@ -140,7 +283,7 @@ namespace ts {
 
     /** Works like Array.prototype.find, returning `undefined` if no element satisfying the predicate is found. */
     export function find<T>(array: T[], predicate: (element: T, index: number) => boolean): T | undefined {
-        for (let i = 0, len = array.length; i < len; i++) {
+        for (let i = 0; i < array.length; i++) {
             const value = array[i];
             if (predicate(value, i)) {
                 return value;
@@ -149,12 +292,22 @@ namespace ts {
         return undefined;
     }
 
+    /** Works like Array.prototype.findIndex, returning `-1` if no element satisfying the predicate is found. */
+    export function findIndex<T>(array: T[], predicate: (element: T, index: number) => boolean): number {
+        for (let i = 0; i < array.length; i++) {
+            if (predicate(array[i], i)) {
+                return i;
+            }
+        }
+        return -1;
+    }
+
     /**
      * Returns the first truthy result of `callback`, or else fails.
      * This is like `forEach`, but never returns undefined.
      */
     export function findMap<T, U>(array: T[], callback: (element: T, index: number) => U | undefined): U {
-        for (let i = 0, len = array.length; i < len; i++) {
+        for (let i = 0; i < array.length; i++) {
             const result = callback(array[i], i);
             if (result) {
                 return result;
@@ -176,7 +329,7 @@ namespace ts {
 
     export function indexOf<T>(array: T[], value: T): number {
         if (array) {
-            for (let i = 0, len = array.length; i < len; i++) {
+            for (let i = 0; i < array.length; i++) {
                 if (array[i] === value) {
                     return i;
                 }
@@ -186,7 +339,7 @@ namespace ts {
     }
 
     export function indexOfAnyCharCode(text: string, charCodes: number[], start?: number): number {
-        for (let i = start || 0, len = text.length; i < len; i++) {
+        for (let i = start || 0; i < text.length; i++) {
             if (contains(charCodes, text.charCodeAt(i))) {
                 return i;
             }
@@ -212,7 +365,7 @@ namespace ts {
      * true for all elements, otherwise returns a new array instance containing the filtered subset.
      */
     export function filter<T, U extends T>(array: T[], f: (x: T) => x is U): U[];
-    export function filter<T>(array: T[], f: (x: T) => boolean): T[]
+    export function filter<T>(array: T[], f: (x: T) => boolean): T[];
     export function filter<T>(array: T[], f: (x: T) => boolean): T[] {
         if (array) {
             const len = array.length;
@@ -265,13 +418,33 @@ namespace ts {
         if (array) {
             result = [];
             for (let i = 0; i < array.length; i++) {
-                const v = array[i];
-                result.push(f(v, i));
+                result.push(f(array[i], i));
             }
         }
         return result;
     }
 
+    // Maps from T to T and avoids allocation if all elements map to themselves
+    export function sameMap<T>(array: T[], f: (x: T, i: number) => T): T[] {
+        let result: T[];
+        if (array) {
+            for (let i = 0; i < array.length; i++) {
+                if (result) {
+                    result.push(f(array[i], i));
+                }
+                else {
+                    const item = array[i];
+                    const mapped = f(item, i);
+                    if (item !== mapped) {
+                        result = array.slice(0, i);
+                        result.push(mapped);
+                    }
+                }
+            }
+        }
+        return result || array;
+    }
+
     /**
      * Flattens an array containing a mix of array or non-array elements.
      *
@@ -302,7 +475,7 @@ namespace ts {
      * @param array The array to map.
      * @param mapfn The callback used to map the result into one or more values.
      */
-    export function flatMap<T, U>(array: T[], mapfn: (x: T, i: number) => U | U[]): U[] {
+    export function flatMap<T, U>(array: T[] | undefined, mapfn: (x: T, i: number) => U | U[] | undefined): U[] | undefined {
         let result: U[];
         if (array) {
             result = [];
@@ -321,6 +494,47 @@ namespace ts {
         return result;
     }
 
+    /**
+     * Maps an array. If the mapped value is an array, it is spread into the result.
+     * Avoids allocation if all elements map to themselves.
+     *
+     * @param array The array to map.
+     * @param mapfn The callback used to map the result into one or more values.
+     */
+    export function sameFlatMap<T>(array: T[], mapfn: (x: T, i: number) => T | T[]): T[] {
+        let result: T[];
+        if (array) {
+            for (let i = 0; i < array.length; i++) {
+                const item = array[i];
+                const mapped = mapfn(item, i);
+                if (result || item !== mapped || isArray(mapped)) {
+                    if (!result) {
+                        result = array.slice(0, i);
+                    }
+                    if (isArray(mapped)) {
+                        addRange(result, mapped);
+                    }
+                    else {
+                        result.push(mapped);
+                    }
+                }
+            }
+        }
+        return result || array;
+    }
+
+    export function mapDefined<T, U>(array: ReadonlyArray<T>, mapFn: (x: T, i: number) => U | undefined): U[] {
+        const result: U[] = [];
+        for (let i = 0; i < array.length; i++) {
+            const item = array[i];
+            const mapped = mapFn(item, i);
+            if (mapped !== undefined) {
+                result.push(mapped);
+            }
+        }
+        return result;
+    }
+
     /**
      * Computes the first matching span of elements and returns a tuple of the first span
      * and the remaining elements.
@@ -385,23 +599,38 @@ namespace ts {
         return result;
     }
 
-    export function mapObject<T, U>(object: MapLike<T>, f: (key: string, x: T) => [string, U]): MapLike<U> {
-        let result: MapLike<U>;
-        if (object) {
-            result = {};
-            for (const v of getOwnKeys(object)) {
-                const [key, value]: [string, U] = f(v, object[v]) || [undefined, undefined];
-                if (key !== undefined) {
-                    result[key] = value;
+    export function mapEntries<T, U>(map: Map<T>, f: (key: string, value: T) => [string, U]): Map<U> {
+        if (!map) {
+            return undefined;
+        }
+
+        const result = createMap<U>();
+        map.forEach((value, key) => {
+            const [newKey, newValue] = f(key, value);
+            result.set(newKey, newValue);
+        });
+        return result;
+    }
+
+    export function some<T>(array: T[], predicate?: (value: T) => boolean): boolean {
+        if (array) {
+            if (predicate) {
+                for (const v of array) {
+                    if (predicate(v)) {
+                        return true;
+                    }
                 }
             }
+            else {
+                return array.length > 0;
+            }
         }
-        return result;
+        return false;
     }
 
     export function concatenate<T>(array1: T[], array2: T[]): T[] {
-        if (!array2 || !array2.length) return array1;
-        if (!array1 || !array1.length) return array2;
+        if (!some(array2)) return array1;
+        if (!some(array1)) return array2;
         return [...array1, ...array2];
     }
 
@@ -422,6 +651,44 @@ namespace ts {
         return result;
     }
 
+    export function arrayIsEqualTo<T>(array1: ReadonlyArray<T>, array2: ReadonlyArray<T>, equaler?: (a: T, b: T) => boolean): boolean {
+        if (!array1 || !array2) {
+            return array1 === array2;
+        }
+
+        if (array1.length !== array2.length) {
+            return false;
+        }
+
+        for (let i = 0; i < array1.length; i++) {
+            const equals = equaler ? equaler(array1[i], array2[i]) : array1[i] === array2[i];
+            if (!equals) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    export function changesAffectModuleResolution(oldOptions: CompilerOptions, newOptions: CompilerOptions): boolean {
+        return !oldOptions ||
+            (oldOptions.module !== newOptions.module) ||
+            (oldOptions.moduleResolution !== newOptions.moduleResolution) ||
+            (oldOptions.noResolve !== newOptions.noResolve) ||
+            (oldOptions.target !== newOptions.target) ||
+            (oldOptions.noLib !== newOptions.noLib) ||
+            (oldOptions.jsx !== newOptions.jsx) ||
+            (oldOptions.allowJs !== newOptions.allowJs) ||
+            (oldOptions.rootDir !== newOptions.rootDir) ||
+            (oldOptions.configFilePath !== newOptions.configFilePath) ||
+            (oldOptions.baseUrl !== newOptions.baseUrl) ||
+            (oldOptions.maxNodeModuleJsDepth !== newOptions.maxNodeModuleJsDepth) ||
+            !arrayIsEqualTo(oldOptions.lib, newOptions.lib) ||
+            !arrayIsEqualTo(oldOptions.typeRoots, newOptions.typeRoots) ||
+            !arrayIsEqualTo(oldOptions.rootDirs, newOptions.rootDirs) ||
+            !equalOwnProperties(oldOptions.paths, newOptions.paths);
+    }
+
     /**
      * Compacts an array, removing any falsey elements.
      */
@@ -443,6 +710,27 @@ namespace ts {
         return result || array;
     }
 
+    /**
+     * Gets the relative complement of `arrayA` with respect to `b`, returning the elements that
+     * are not present in `arrayA` but are present in `arrayB`. Assumes both arrays are sorted
+     * based on the provided comparer.
+     */
+    export function relativeComplement<T>(arrayA: T[] | undefined, arrayB: T[] | undefined, comparer: (x: T, y: T) => Comparison = compareValues, offsetA = 0, offsetB = 0): T[] | undefined {
+        if (!arrayB || !arrayA || arrayB.length === 0 || arrayA.length === 0) return arrayB;
+        const result: T[] = [];
+        outer: for (; offsetB < arrayB.length; offsetB++) {
+            inner: for (; offsetA < arrayA.length; offsetA++) {
+                switch (comparer(arrayB[offsetB], arrayA[offsetA])) {
+                    case Comparison.LessThan: break inner;
+                    case Comparison.EqualTo: continue outer;
+                    case Comparison.GreaterThan: continue inner;
+                }
+            }
+            result.push(arrayB[offsetB]);
+        }
+        return result;
+    }
+
     export function sum(array: any[], prop: string): number {
         let result = 0;
         for (const v of array) {
@@ -451,14 +739,61 @@ namespace ts {
         return result;
     }
 
-    export function addRange<T>(to: T[], from: T[]): void {
-        if (to && from) {
-            for (const v of from) {
-                if (v !== undefined) {
-                    to.push(v);
-                }
+    /**
+     * Appends a value to an array, returning the array.
+     *
+     * @param to The array to which `value` is to be appended. If `to` is `undefined`, a new array
+     * is created if `value` was appended.
+     * @param value The value to append to the array. If `value` is `undefined`, nothing is
+     * appended.
+     */
+    export function append<T>(to: T[] | undefined, value: T | undefined): T[] | undefined {
+        if (value === undefined) return to;
+        if (to === undefined) return [value];
+        to.push(value);
+        return to;
+    }
+
+    /**
+     * Gets the actual offset into an array for a relative offset. Negative offsets indicate a
+     * position offset from the end of the array.
+     */
+    function toOffset(array: any[], offset: number) {
+        return offset < 0 ? array.length + offset : offset;
+    }
+
+    /**
+     * Appends a range of value to an array, returning the array.
+     *
+     * @param to The array to which `value` is to be appended. If `to` is `undefined`, a new array
+     * is created if `value` was appended.
+     * @param from The values to append to the array. If `from` is `undefined`, nothing is
+     * appended. If an element of `from` is `undefined`, that element is not appended.
+     * @param start The offset in `from` at which to start copying values.
+     * @param end The offset in `from` at which to stop copying values (non-inclusive).
+     */
+    export function addRange<T>(to: T[] | undefined, from: T[] | undefined, start?: number, end?: number): T[] | undefined {
+        if (from === undefined) return to;
+        if (to === undefined) return from.slice(start, end);
+        start = start === undefined ? 0 : toOffset(from, start);
+        end = end === undefined ? from.length : toOffset(from, end);
+        for (let i = start; i < end && i < from.length; i++) {
+            const v = from[i];
+            if (v !== undefined) {
+                to.push(from[i]);
             }
         }
+        return to;
+    }
+
+    /**
+     * Stable sort of an array. Elements equal to each other maintain their relative position in the array.
+     */
+    export function stableSort<T>(array: T[], comparer: (x: T, y: T) => Comparison = compareValues) {
+        return array
+            .map((_, i) => i) // create array of indices
+            .sort((x, y) => comparer(array[x], array[y]) || compareValues(x, y)) // sort indices by value then position
+            .map(i => array[i]); // get sorted array
     }
 
     export function rangeEquals<T>(array1: T[], array2: T[], pos: number, end: number) {
@@ -471,31 +806,57 @@ namespace ts {
         return true;
     }
 
-    export function firstOrUndefined<T>(array: T[]): T {
-        return array && array.length > 0
-            ? array[0]
-            : undefined;
+    /**
+     * Returns the element at a specific offset in an array if non-empty, `undefined` otherwise.
+     * A negative offset indicates the element should be retrieved from the end of the array.
+     */
+    export function elementAt<T>(array: T[] | undefined, offset: number): T | undefined {
+        if (array) {
+            offset = toOffset(array, offset);
+            if (offset < array.length) {
+                return array[offset];
+            }
+        }
+        return undefined;
     }
 
-    export function singleOrUndefined<T>(array: T[]): T {
+    /**
+     * Returns the first element of an array if non-empty, `undefined` otherwise.
+     */
+    export function firstOrUndefined<T>(array: T[]): T | undefined {
+        return elementAt(array, 0);
+    }
+
+    /**
+     * Returns the last element of an array if non-empty, `undefined` otherwise.
+     */
+    export function lastOrUndefined<T>(array: T[]): T | undefined {
+        return elementAt(array, -1);
+    }
+
+    /**
+     * Returns the only element of an array if it contains only one element, `undefined` otherwise.
+     */
+    export function singleOrUndefined<T>(array: T[]): T | undefined {
         return array && array.length === 1
             ? array[0]
             : undefined;
     }
 
+    /**
+     * Returns the only element of an array if it contains only one element; otheriwse, returns the
+     * array.
+     */
     export function singleOrMany<T>(array: T[]): T | T[] {
         return array && array.length === 1
             ? array[0]
             : array;
     }
 
-    /**
-     * Returns the last element of an array if non-empty, undefined otherwise.
-     */
-    export function lastOrUndefined<T>(array: T[]): T {
-        return array && array.length > 0
-            ? array[array.length - 1]
-            : undefined;
+    export function replaceElement<T>(array: T[], index: number, value: T): T[] {
+        const result = array.slice(0);
+        result[index] = value;
+        return result;
     }
 
     /**
@@ -505,12 +866,12 @@ namespace ts {
      * @param array A sorted array whose first element must be no larger than number
      * @param number The value to be searched for in the array.
      */
-    export function binarySearch<T>(array: T[], value: T, comparer?: (v1: T, v2: T) => number): number {
+    export function binarySearch<T>(array: T[], value: T, comparer?: (v1: T, v2: T) => number, offset?: number): number {
         if (!array || array.length === 0) {
             return -1;
         }
 
-        let low = 0;
+        let low = offset || 0;
         let high = array.length - 1;
         comparer = comparer !== undefined
             ? comparer
@@ -591,9 +952,6 @@ namespace ts {
     /**
      * Indicates whether a map-like contains an own property with the specified key.
      *
-     * NOTE: This is intended for use only with MapLike<T> objects. For Map<T> objects, use
-     *       the 'in' operator.
-     *
      * @param map A map-like.
      * @param key A property key.
      */
@@ -604,9 +962,6 @@ namespace ts {
     /**
      * Gets the value of an owned property in a map-like.
      *
-     * NOTE: This is intended for use only with MapLike<T> objects. For Map<T> objects, use
-     *       an indexer.
-     *
      * @param map A map-like.
      * @param key A property key.
      */
@@ -624,49 +979,67 @@ namespace ts {
      */
     export function getOwnKeys<T>(map: MapLike<T>): string[] {
         const keys: string[] = [];
-        for (const key in map) if (hasOwnProperty.call(map, key)) {
-            keys.push(key);
+        for (const key in map) {
+            if (hasOwnProperty.call(map, key)) {
+                keys.push(key);
+            }
         }
+
         return keys;
     }
 
-    /**
-     * Enumerates the properties of a Map<T>, invoking a callback and returning the first truthy result.
-     *
-     * @param map A map for which properties should be enumerated.
-     * @param callback A callback to invoke for each property.
-     */
-    export function forEachProperty<T, U>(map: Map<T>, callback: (value: T, key: string) => U): U {
-        let result: U;
-        for (const key in map) {
-            if (result = callback(map[key], key)) break;
+    /** Shims `Array.from`. */
+    export function arrayFrom<T, U>(iterator: Iterator<T>, map: (t: T) => U): U[];
+    export function arrayFrom<T>(iterator: Iterator<T>): T[];
+    export function arrayFrom(iterator: Iterator<any>, map?: (t: any) => any): any[] {
+        const result: any[] = [];
+        for (let { value, done } = iterator.next(); !done; { value, done } = iterator.next()) {
+            result.push(map ? map(value) : value);
         }
         return result;
     }
 
-    /**
-     * Returns true if a Map<T> has some matching property.
-     *
-     * @param map A map whose properties should be tested.
-     * @param predicate An optional callback used to test each property.
-     */
-    export function someProperties<T>(map: Map<T>, predicate?: (value: T, key: string) => boolean) {
-        for (const key in map) {
-            if (!predicate || predicate(map[key], key)) return true;
+    export function convertToArray<T, U>(iterator: Iterator<T>, f: (value: T) => U) {
+        const result: U[] = [];
+        for (let { value, done } = iterator.next(); !done; { value, done } = iterator.next()) {
+            result.push(f(value));
         }
-        return false;
+        return result;
     }
 
     /**
-     * Performs a shallow copy of the properties from a source Map<T> to a target MapLike<T>
-     *
-     * @param source A map from which properties should be copied.
-     * @param target A map to which properties should be copied.
+     * Calls `callback` for each entry in the map, returning the first truthy result.
+     * Use `map.forEach` instead for normal iteration.
      */
-    export function copyProperties<T>(source: Map<T>, target: MapLike<T>): void {
-        for (const key in source) {
-            target[key] = source[key];
+    export function forEachEntry<T, U>(map: Map<T>, callback: (value: T, key: string) => U | undefined): U | undefined {
+        const iterator = map.entries();
+        for (let { value: pair, done } = iterator.next(); !done; { value: pair, done } = iterator.next()) {
+            const [key, value] = pair;
+            const result = callback(value, key);
+            if (result) {
+                return result;
+            }
+        }
+        return undefined;
+    }
+
+    /** `forEachEntry` for just keys. */
+    export function forEachKey<T>(map: Map<{}>, callback: (key: string) => T | undefined): T | undefined {
+        const iterator = map.keys();
+        for (let { value: key, done } = iterator.next(); !done; { value: key, done } = iterator.next()) {
+            const result = callback(key);
+            if (result) {
+                return result;
+            }
         }
+        return undefined;
+    }
+
+    /** Copy entries from `source` to `target`. */
+    export function copyEntries<T>(source: Map<T>, target: Map<T>): void {
+        source.forEach((value, key) => {
+            target.set(key, value);
+        });
     }
 
     export function assign<T1 extends MapLike<{}>, T2, T3>(t: T1, arg1: T2, arg2: T3): T1 & T2 & T3;
@@ -674,49 +1047,15 @@ namespace ts {
     export function assign<T1 extends MapLike<{}>>(t: T1, ...args: any[]): any;
     export function assign<T1 extends MapLike<{}>>(t: T1, ...args: any[]) {
         for (const arg of args) {
-            for (const p of getOwnKeys(arg)) {
-                t[p] = arg[p];
+            for (const p in arg) {
+                if (hasProperty(arg, p)) {
+                    t[p] = arg[p];
+                }
             }
         }
         return t;
     }
 
-    /**
-     * Reduce the properties of a map.
-     *
-     * NOTE: This is intended for use with Map<T> objects. For MapLike<T> objects, use
-     *       reduceOwnProperties instead as it offers better runtime safety.
-     *
-     * @param map The map to reduce
-     * @param callback An aggregation function that is called for each entry in the map
-     * @param initial The initial value for the reduction.
-     */
-    export function reduceProperties<T, U>(map: Map<T>, callback: (aggregate: U, value: T, key: string) => U, initial: U): U {
-        let result = initial;
-        for (const key in map) {
-            result = callback(result, map[key], String(key));
-        }
-        return result;
-    }
-
-    /**
-     * Reduce the properties defined on a map-like (but not from its prototype chain).
-     *
-     * NOTE: This is intended for use with MapLike<T> objects. For Map<T> objects, use
-     *       reduceProperties instead as it offers better performance.
-     *
-     * @param map The map-like to reduce
-     * @param callback An aggregation function that is called for each entry in the map
-     * @param initial The initial value for the reduction.
-     */
-    export function reduceOwnProperties<T, U>(map: MapLike<T>, callback: (aggregate: U, value: T, key: string) => U, initial: U): U {
-        let result = initial;
-        for (const key in map) if (hasOwnProperty.call(map, key)) {
-            result = callback(result, map[key], String(key));
-        }
-        return result;
-    }
-
     /**
      * Performs a shallow equality comparison of the contents of two map-likes.
      *
@@ -726,13 +1065,19 @@ namespace ts {
     export function equalOwnProperties<T>(left: MapLike<T>, right: MapLike<T>, equalityComparer?: (left: T, right: T) => boolean) {
         if (left === right) return true;
         if (!left || !right) return false;
-        for (const key in left) if (hasOwnProperty.call(left, key)) {
-            if (!hasOwnProperty.call(right, key) === undefined) return false;
-            if (equalityComparer ? !equalityComparer(left[key], right[key]) : left[key] !== right[key]) return false;
+        for (const key in left) {
+            if (hasOwnProperty.call(left, key)) {
+                if (!hasOwnProperty.call(right, key) === undefined) return false;
+                if (equalityComparer ? !equalityComparer(left[key], right[key]) : left[key] !== right[key]) return false;
+            }
         }
-        for (const key in right) if (hasOwnProperty.call(right, key)) {
-            if (!hasOwnProperty.call(left, key)) return false;
+
+        for (const key in right) {
+            if (hasOwnProperty.call(right, key)) {
+                if (!hasOwnProperty.call(left, key)) return false;
+            }
         }
+
         return true;
     }
 
@@ -751,23 +1096,14 @@ namespace ts {
     export function arrayToMap<T, U>(array: T[], makeKey: (value: T) => string, makeValue?: (value: T) => U): Map<T | U> {
         const result = createMap<T | U>();
         for (const value of array) {
-            result[makeKey(value)] = makeValue ? makeValue(value) : value;
+            result.set(makeKey(value), makeValue ? makeValue(value) : value);
         }
         return result;
     }
 
-    export function isEmpty<T>(map: Map<T>) {
-        for (const id in map) {
-            if (hasProperty(map, id)) {
-                return false;
-            }
-        }
-        return true;
-    }
-
     export function cloneMap<T>(map: Map<T>) {
         const clone = createMap<T>();
-        copyProperties(map, clone);
+        copyEntries(map, clone);
         return clone;
     }
 
@@ -781,43 +1117,60 @@ namespace ts {
         return result;
     }
 
-    export function extend<T1, T2>(first: T1 , second: T2): T1 & T2 {
+    export function extend<T1, T2>(first: T1, second: T2): T1 & T2 {
         const result: T1 & T2 = <any>{};
-        for (const id in second) if (hasOwnProperty.call(second, id)) {
-            (result as any)[id] = (second as any)[id];
+        for (const id in second) {
+            if (hasOwnProperty.call(second, id)) {
+                (result as any)[id] = (second as any)[id];
+            }
         }
-        for (const id in first) if (hasOwnProperty.call(first, id)) {
-            (result as any)[id] = (first as any)[id];
+
+        for (const id in first) {
+            if (hasOwnProperty.call(first, id)) {
+                (result as any)[id] = (first as any)[id];
+            }
         }
+
         return result;
     }
 
-    /**
-     * Adds the value to an array of values associated with the key, and returns the array.
-     * Creates the array if it does not already exist.
-     */
-    export function multiMapAdd<V>(map: Map<V[]>, key: string, value: V): V[] {
-        const values = map[key];
+    export interface MultiMap<T> extends Map<T[]> {
+        /**
+         * Adds the value to an array of values associated with the key, and returns the array.
+         * Creates the array if it does not already exist.
+         */
+        add(key: string, value: T): T[];
+        /**
+         * Removes a value from an array of values associated with the key.
+         * Does not preserve the order of those values.
+         * Does nothing if `key` is not in `map`, or `value` is not in `map[key]`.
+         */
+        remove(key: string, value: T): void;
+    }
+
+    export function createMultiMap<T>(): MultiMap<T> {
+        const map = createMap<T[]>() as MultiMap<T>;
+        map.add = multiMapAdd;
+        map.remove = multiMapRemove;
+        return map;
+    }
+    function multiMapAdd<T>(this: MultiMap<T>, key: string, value: T) {
+        let values = this.get(key);
         if (values) {
             values.push(value);
-            return values;
         }
         else {
-            return map[key] = [value];
+            this.set(key, values = [value]);
         }
-    }
+        return values;
 
-    /**
-     * Removes a value from an array of values associated with the key.
-     * Does not preserve the order of those values.
-     * Does nothing if `key` is not in `map`, or `value` is not in `map[key]`.
-     */
-    export function multiMapRemove<V>(map: Map<V[]>, key: string, value: V): void {
-        const values = map[key];
+    }
+    function multiMapRemove<T>(this: MultiMap<T>, key: string, value: T) {
+        const values = this.get(key);
         if (values) {
             unorderedRemoveItem(values, value);
             if (!values.length) {
-                delete map[key];
+                this.delete(key);
             }
         }
     }
@@ -829,6 +1182,23 @@ namespace ts {
         return Array.isArray ? Array.isArray(value) : value instanceof Array;
     }
 
+    export function tryCast<TOut extends TIn, TIn = any>(value: TIn | undefined, test: (value: TIn) => value is TOut): TOut | undefined {
+        return value !== undefined && test(value) ? value : undefined;
+    }
+
+    export function cast<TOut extends TIn, TIn = any>(value: TIn | undefined, test: (value: TIn) => value is TOut): TOut {
+        if (value !== undefined && test(value)) return value;
+        Debug.fail(`Invalid cast. The supplied value did not pass the test '${Debug.getFunctionName(test)}'.`);
+    }
+
+    /** Does nothing. */
+    export function noop(): void {}
+
+    /** Throws an error because a function is not implemented. */
+    export function notImplemented(): never {
+        throw new Error("Not implemented");
+    }
+
     export function memoize<T>(callback: () => T): () => T {
         let value: T;
         return () => {
@@ -869,7 +1239,7 @@ namespace ts {
             return t => compose(a(t));
         }
         else {
-            return t => u => u;
+            return _ => u => u;
         }
     }
 
@@ -906,19 +1276,19 @@ namespace ts {
         }
     }
 
-    function formatStringFromArgs(text: string, args: { [index: number]: any; }, baseIndex?: number): string {
+    export function formatStringFromArgs(text: string, args: { [index: number]: string; }, baseIndex?: number): string {
         baseIndex = baseIndex || 0;
 
-        return text.replace(/{(\d+)}/g, (match, index?) => args[+index + baseIndex]);
+        return text.replace(/{(\d+)}/g, (_match, index?) => args[+index + baseIndex]);
     }
 
-    export let localizedDiagnosticMessages: Map<string> = undefined;
+    export let localizedDiagnosticMessages: MapLike<string> = undefined;
 
     export function getLocaleSpecificMessage(message: DiagnosticMessage) {
         return localizedDiagnosticMessages && localizedDiagnosticMessages[message.key] || message.message;
     }
 
-    export function createFileDiagnostic(file: SourceFile, start: number, length: number, message: DiagnosticMessage, ...args: any[]): Diagnostic;
+    export function createFileDiagnostic(file: SourceFile, start: number, length: number, message: DiagnosticMessage, ...args: (string | number)[]): Diagnostic;
     export function createFileDiagnostic(file: SourceFile, start: number, length: number, message: DiagnosticMessage): Diagnostic {
         const end = start + length;
 
@@ -926,8 +1296,8 @@ namespace ts {
         Debug.assert(length >= 0, "length must be non-negative, is " + length);
 
         if (file) {
-            Debug.assert(start <= file.text.length, `start must be within the bounds of the file. ${ start } > ${ file.text.length }`);
-            Debug.assert(end <= file.text.length, `end must be the bounds of the file. ${ end } > ${ file.text.length }`);
+            Debug.assert(start <= file.text.length, `start must be within the bounds of the file. ${start} > ${file.text.length}`);
+            Debug.assert(end <= file.text.length, `end must be the bounds of the file. ${end} > ${file.text.length}`);
         }
 
         let text = getLocaleSpecificMessage(message);
@@ -948,7 +1318,7 @@ namespace ts {
     }
 
     /* internal */
-    export function formatMessage(dummy: any, message: DiagnosticMessage): string {
+    export function formatMessage(_dummy: any, message: DiagnosticMessage): string {
         let text = getLocaleSpecificMessage(message);
 
         if (arguments.length > 2) {
@@ -958,7 +1328,7 @@ namespace ts {
         return text;
     }
 
-    export function createCompilerDiagnostic(message: DiagnosticMessage, ...args: any[]): Diagnostic;
+    export function createCompilerDiagnostic(message: DiagnosticMessage, ...args: (string | number)[]): Diagnostic;
     export function createCompilerDiagnostic(message: DiagnosticMessage): Diagnostic {
         let text = getLocaleSpecificMessage(message);
 
@@ -977,6 +1347,18 @@ namespace ts {
         };
     }
 
+    export function createCompilerDiagnosticFromMessageChain(chain: DiagnosticMessageChain): Diagnostic {
+        return {
+            file: undefined,
+            start: undefined,
+            length: undefined,
+
+            code: chain.code,
+            category: chain.category,
+            messageText: chain.next ? chain : chain.messageText
+        };
+    }
+
     export function chainDiagnosticMessages(details: DiagnosticMessageChain, message: DiagnosticMessage, ...args: any[]): DiagnosticMessageChain;
     export function chainDiagnosticMessages(details: DiagnosticMessageChain, message: DiagnosticMessage): DiagnosticMessageChain {
         let text = getLocaleSpecificMessage(message);
@@ -1016,8 +1398,12 @@ namespace ts {
         if (a === undefined) return Comparison.LessThan;
         if (b === undefined) return Comparison.GreaterThan;
         if (ignoreCase) {
-            if (String.prototype.localeCompare) {
-                const result = a.localeCompare(b, /*locales*/ undefined, { usage: "sort", sensitivity: "accent" });
+            // Checking if "collator exists indicates that Intl is available.
+            // We still have to check if "collator.compare" is correct. If it is not, use "String.localeComapre"
+            if (collator) {
+                const result = localeCompareIsCorrect ?
+                    collator.compare(a, b) :
+                    a.localeCompare(b, /*locales*/ undefined, { usage: "sort", sensitivity: "accent" });  // accent means a ≠ b, a ≠ á, a = A
                 return result < 0 ? Comparison.LessThan : result > 0 ? Comparison.GreaterThan : Comparison.EqualTo;
             }
 
@@ -1097,7 +1483,9 @@ namespace ts {
         return path.replace(/\\/g, "/");
     }
 
-    // Returns length of path root (i.e. length of "/", "x:/", "//server/share/, file:///user/files")
+    /**
+     * Returns length of path root (i.e. length of "/", "x:/", "//server/share/, file:///user/files")
+     */
     export function getRootLength(path: string): number {
         if (path.charCodeAt(0) === CharacterCodes.slash) {
             if (path.charCodeAt(1) !== CharacterCodes.slash) return 1;
@@ -1126,9 +1514,14 @@ namespace ts {
         return 0;
     }
 
+    /**
+     * Internally, we represent paths as strings with '/' as the directory separator.
+     * When we make system calls (eg: LanguageServiceHost.getDirectory()),
+     * we expect the host to correctly handle paths in our specified format.
+     */
     export const directorySeparator = "/";
     const directorySeparatorCharCode = CharacterCodes.slash;
-    function getNormalizedParts(normalizedSlashedPath: string, rootLength: number) {
+    function getNormalizedParts(normalizedSlashedPath: string, rootLength: number): string[] {
         const parts = normalizedSlashedPath.substr(rootLength).split(directorySeparator);
         const normalized: string[] = [];
         for (const part of parts) {
@@ -1168,9 +1561,14 @@ namespace ts {
         return path.charCodeAt(path.length - 1) === directorySeparatorCharCode;
     }
 
+    /**
+     * Returns the path except for its basename. Eg:
+     *
+     * /path/to/file.ext -> /path/to
+     */
     export function getDirectoryPath(path: Path): Path;
     export function getDirectoryPath(path: string): string;
-    export function getDirectoryPath(path: string): any {
+    export function getDirectoryPath(path: string): string {
         return path.substr(0, Math.max(getRootLength(path), path.lastIndexOf(directorySeparator)));
     }
 
@@ -1191,7 +1589,15 @@ namespace ts {
     export function getEmitModuleKind(compilerOptions: CompilerOptions) {
         return typeof compilerOptions.module === "number" ?
             compilerOptions.module :
-            getEmitScriptTarget(compilerOptions) === ScriptTarget.ES6 ? ModuleKind.ES6 : ModuleKind.CommonJS;
+            getEmitScriptTarget(compilerOptions) >= ScriptTarget.ES2015 ? ModuleKind.ES2015 : ModuleKind.CommonJS;
+    }
+
+    export function getEmitModuleResolutionKind(compilerOptions: CompilerOptions) {
+        let moduleResolution = compilerOptions.moduleResolution;
+        if (moduleResolution === undefined) {
+            moduleResolution = getEmitModuleKind(compilerOptions) === ModuleKind.CommonJS ? ModuleResolutionKind.NodeJs : ModuleResolutionKind.Classic;
+        }
+        return moduleResolution;
     }
 
     /* @internal */
@@ -1424,17 +1830,27 @@ namespace ts {
         return str.lastIndexOf(prefix, 0) === 0;
     }
 
+    /* @internal */
+    export function removePrefix(str: string, prefix: string): string {
+        return startsWith(str, prefix) ? str.substr(prefix.length) : str;
+    }
+
     /* @internal */
     export function endsWith(str: string, suffix: string): boolean {
         const expectedPos = str.length - suffix.length;
         return expectedPos >= 0 && str.indexOf(suffix, expectedPos) === expectedPos;
     }
 
+    export function hasExtension(fileName: string): boolean {
+        return getBaseFileName(fileName).indexOf(".") >= 0;
+    }
+
     export function fileExtensionIs(path: string, extension: string): boolean {
         return path.length > extension.length && endsWith(path, extension);
     }
 
-    export function fileExtensionIsAny(path: string, extensions: string[]): boolean {
+    /* @internal */
+    export function fileExtensionIsOneOf(path: string, extensions: string[]): boolean {
         for (const extension of extensions) {
             if (fileExtensionIs(path, extension)) {
                 return true;
@@ -1459,12 +1875,24 @@ namespace ts {
     const singleAsteriskRegexFragmentFiles = "([^./]|(\\.(?!min\\.js$))?)*";
     const singleAsteriskRegexFragmentOther = "[^/]*";
 
-    export function getRegularExpressionForWildcard(specs: string[], basePath: string, usage: "files" | "directories" | "exclude") {
+    export function getRegularExpressionForWildcard(specs: string[], basePath: string, usage: "files" | "directories" | "exclude"): string | undefined {
+        const patterns = getRegularExpressionsForWildcards(specs, basePath, usage);
+        if (!patterns || !patterns.length) {
+            return undefined;
+        }
+
+        const pattern = patterns.map(pattern => `(${pattern})`).join("|");
+        // If excluding, match "foo/bar/baz...", but if including, only allow "foo".
+        const terminator = usage === "exclude" ? "($|/)" : "$";
+        return `^(${pattern})${terminator}`;
+    }
+
+    function getRegularExpressionsForWildcards(specs: string[], basePath: string, usage: "files" | "directories" | "exclude"): string[] | undefined {
         if (specs === undefined || specs.length === 0) {
             return undefined;
         }
 
-        const replaceWildcardCharacter =  usage === "files" ? replaceWildCardCharacterFiles : replaceWildCardCharacterOther;
+        const replaceWildcardCharacter = usage === "files" ? replaceWildCardCharacterFiles : replaceWildCardCharacterOther;
         const singleAsteriskRegexFragment = usage === "files" ? singleAsteriskRegexFragmentFiles : singleAsteriskRegexFragmentOther;
 
         /**
@@ -1473,83 +1901,82 @@ namespace ts {
          */
         const doubleAsteriskRegexFragment = usage === "exclude" ? "(/.+?)?" : "(/[^/.][^/]*)*?";
 
-        let pattern = "";
-        let hasWrittenSubpattern = false;
-        spec: for (const spec of specs) {
-            if (!spec) {
-                continue;
-            }
+        return flatMap(specs, spec =>
+            spec && getSubPatternFromSpec(spec, basePath, usage, singleAsteriskRegexFragment, doubleAsteriskRegexFragment, replaceWildcardCharacter));
+    }
 
-            let subpattern = "";
-            let hasRecursiveDirectoryWildcard = false;
-            let hasWrittenComponent = false;
-            const components = getNormalizedPathComponents(spec, basePath);
-            if (usage !== "exclude" && components[components.length - 1] === "**") {
-                continue spec;
-            }
+    /**
+     * An "includes" path "foo" is implicitly a glob "foo/** /*" (without the space) if its last component has no extension,
+     * and does not contain any glob characters itself.
+     */
+    export function isImplicitGlob(lastPathComponent: string): boolean {
+        return !/[.*?]/.test(lastPathComponent);
+    }
 
-            // getNormalizedPathComponents includes the separator for the root component.
-            // We need to remove to create our regex correctly.
-            components[0] = removeTrailingDirectorySeparator(components[0]);
+    function getSubPatternFromSpec(spec: string, basePath: string, usage: "files" | "directories" | "exclude", singleAsteriskRegexFragment: string, doubleAsteriskRegexFragment: string, replaceWildcardCharacter: (match: string) => string): string | undefined {
+        let subpattern = "";
+        let hasRecursiveDirectoryWildcard = false;
+        let hasWrittenComponent = false;
+        const components = getNormalizedPathComponents(spec, basePath);
+        const lastComponent = lastOrUndefined(components);
+        if (usage !== "exclude" && lastComponent === "**") {
+            return undefined;
+        }
 
-            let optionalCount = 0;
-            for (let component of components) {
-                if (component === "**") {
-                    if (hasRecursiveDirectoryWildcard) {
-                        continue spec;
-                    }
+        // getNormalizedPathComponents includes the separator for the root component.
+        // We need to remove to create our regex correctly.
+        components[0] = removeTrailingDirectorySeparator(components[0]);
 
-                    subpattern += doubleAsteriskRegexFragment;
-                    hasRecursiveDirectoryWildcard = true;
-                    hasWrittenComponent = true;
-                }
-                else {
-                    if (usage === "directories") {
-                        subpattern += "(";
-                        optionalCount++;
-                    }
+        if (isImplicitGlob(lastComponent)) {
+            components.push("**", "*");
+        }
 
-                    if (hasWrittenComponent) {
-                        subpattern += directorySeparator;
-                    }
+        let optionalCount = 0;
+        for (let component of components) {
+            if (component === "**") {
+                if (hasRecursiveDirectoryWildcard) {
+                    return undefined;
+                }
 
-                    if (usage !== "exclude") {
-                        // The * and ? wildcards should not match directories or files that start with . if they
-                        // appear first in a component. Dotted directories and files can be included explicitly
-                        // like so: **/.*/.*
-                        if (component.charCodeAt(0) === CharacterCodes.asterisk) {
-                            subpattern += "([^./]" + singleAsteriskRegexFragment + ")?";
-                            component = component.substr(1);
-                        }
-                        else if (component.charCodeAt(0) === CharacterCodes.question) {
-                            subpattern += "[^./]";
-                            component = component.substr(1);
-                        }
-                    }
+                subpattern += doubleAsteriskRegexFragment;
+                hasRecursiveDirectoryWildcard = true;
+            }
+            else {
+                if (usage === "directories") {
+                    subpattern += "(";
+                    optionalCount++;
+                }
 
-                    subpattern += component.replace(reservedCharacterPattern, replaceWildcardCharacter);
-                    hasWrittenComponent = true;
+                if (hasWrittenComponent) {
+                    subpattern += directorySeparator;
                 }
-            }
 
-            while (optionalCount > 0) {
-                subpattern += ")?";
-                optionalCount--;
-            }
+                if (usage !== "exclude") {
+                    // The * and ? wildcards should not match directories or files that start with . if they
+                    // appear first in a component. Dotted directories and files can be included explicitly
+                    // like so: **/.*/.*
+                    if (component.charCodeAt(0) === CharacterCodes.asterisk) {
+                        subpattern += "([^./]" + singleAsteriskRegexFragment + ")?";
+                        component = component.substr(1);
+                    }
+                    else if (component.charCodeAt(0) === CharacterCodes.question) {
+                        subpattern += "[^./]";
+                        component = component.substr(1);
+                    }
+                }
 
-            if (hasWrittenSubpattern) {
-                pattern += "|";
+                subpattern += component.replace(reservedCharacterPattern, replaceWildcardCharacter);
             }
 
-            pattern += "(" + subpattern + ")";
-            hasWrittenSubpattern = true;
+            hasWrittenComponent = true;
         }
 
-        if (!pattern) {
-            return undefined;
+        while (optionalCount > 0) {
+            subpattern += ")?";
+            optionalCount--;
         }
 
-        return "^(" + pattern + (usage === "exclude" ? ")($|/)" : ")$");
+        return subpattern;
     }
 
     function replaceWildCardCharacterFiles(match: string) {
@@ -1570,18 +1997,22 @@ namespace ts {
     }
 
     export interface FileMatcherPatterns {
+        /** One pattern for each "include" spec. */
+        includeFilePatterns: string[];
+        /** One pattern matching one of any of the "include" specs. */
         includeFilePattern: string;
         includeDirectoryPattern: string;
         excludePattern: string;
         basePaths: string[];
     }
 
-    export function getFileMatcherPatterns(path: string, extensions: string[], excludes: string[], includes: string[], useCaseSensitiveFileNames: boolean, currentDirectory: string): FileMatcherPatterns {
+    export function getFileMatcherPatterns(path: string, excludes: string[], includes: string[], useCaseSensitiveFileNames: boolean, currentDirectory: string): FileMatcherPatterns {
         path = normalizePath(path);
         currentDirectory = normalizePath(currentDirectory);
         const absolutePath = combinePaths(currentDirectory, path);
 
         return {
+            includeFilePatterns: map(getRegularExpressionsForWildcards(includes, absolutePath, "files"), pattern => `^${pattern}$`),
             includeFilePattern: getRegularExpressionForWildcard(includes, absolutePath, "files"),
             includeDirectoryPattern: getRegularExpressionForWildcard(includes, absolutePath, "directories"),
             excludePattern: getRegularExpressionForWildcard(excludes, absolutePath, "exclude"),
@@ -1593,29 +2024,42 @@ namespace ts {
         path = normalizePath(path);
         currentDirectory = normalizePath(currentDirectory);
 
-        const patterns = getFileMatcherPatterns(path, extensions, excludes, includes, useCaseSensitiveFileNames, currentDirectory);
+        const patterns = getFileMatcherPatterns(path, excludes, includes, useCaseSensitiveFileNames, currentDirectory);
 
         const regexFlag = useCaseSensitiveFileNames ? "" : "i";
-        const includeFileRegex = patterns.includeFilePattern && new RegExp(patterns.includeFilePattern, regexFlag);
+        const includeFileRegexes = patterns.includeFilePatterns && patterns.includeFilePatterns.map(pattern => new RegExp(pattern, regexFlag));
         const includeDirectoryRegex = patterns.includeDirectoryPattern && new RegExp(patterns.includeDirectoryPattern, regexFlag);
         const excludeRegex = patterns.excludePattern && new RegExp(patterns.excludePattern, regexFlag);
 
-        const result: string[] = [];
+        // Associate an array of results with each include regex. This keeps results in order of the "include" order.
+        // If there are no "includes", then just put everything in results[0].
+        const results: string[][] = includeFileRegexes ? includeFileRegexes.map(() => []) : [[]];
+
+        const comparer = useCaseSensitiveFileNames ? compareStrings : compareStringsCaseInsensitive;
         for (const basePath of patterns.basePaths) {
             visitDirectory(basePath, combinePaths(currentDirectory, basePath));
         }
-        return result;
+
+        return flatten(results);
 
         function visitDirectory(path: string, absolutePath: string) {
-            const { files, directories } = getFileSystemEntries(path);
+            let { files, directories } = getFileSystemEntries(path);
+            files = files.slice().sort(comparer);
+            directories = directories.slice().sort(comparer);
 
             for (const current of files) {
                 const name = combinePaths(path, current);
                 const absoluteName = combinePaths(absolutePath, current);
-                if ((!extensions || fileExtensionIsAny(name, extensions)) &&
-                    (!includeFileRegex || includeFileRegex.test(absoluteName)) &&
-                    (!excludeRegex || !excludeRegex.test(absoluteName))) {
-                    result.push(name);
+                if (extensions && !fileExtensionIsOneOf(name, extensions)) continue;
+                if (excludeRegex && excludeRegex.test(absoluteName)) continue;
+                if (!includeFileRegexes) {
+                    results[0].push(name);
+                }
+                else {
+                    const includeIndex = findIndex(includeFileRegexes, re => re.test(absoluteName));
+                    if (includeIndex !== -1) {
+                        results[includeIndex].push(name);
+                    }
                 }
             }
 
@@ -1636,6 +2080,7 @@ namespace ts {
     function getBasePaths(path: string, includes: string[], useCaseSensitiveFileNames: boolean) {
         // Storage for our results in the form of literal paths (e.g. the paths as written by the user).
         const basePaths: string[] = [path];
+
         if (includes) {
             // Storage for literal base paths amongst the include patterns.
             const includeBasePaths: string[] = [];
@@ -1643,14 +2088,8 @@ namespace ts {
                 // We also need to check the relative paths by converting them to absolute and normalizing
                 // in case they escape the base path (e.g "..\somedirectory")
                 const absolute: string = isRootedDiskPath(include) ? include : normalizePath(combinePaths(path, include));
-
-                const wildcardOffset = indexOfAnyCharCode(absolute, wildcardCharCodes);
-                const includeBasePath = wildcardOffset < 0
-                    ? removeTrailingDirectorySeparator(getDirectoryPath(absolute))
-                    : absolute.substring(0, absolute.lastIndexOf(directorySeparator, wildcardOffset));
-
                 // Append the literal and canonical candidate base paths.
-                includeBasePaths.push(includeBasePath);
+                includeBasePaths.push(getIncludeBasePath(absolute));
             }
 
             // Sort the offsets array using either the literal or canonical path representations.
@@ -1658,21 +2097,27 @@ namespace ts {
 
             // Iterate over each include base path and include unique base paths that are not a
             // subpath of an existing base path
-            include: for (let i = 0; i < includeBasePaths.length; i++) {
-                const includeBasePath = includeBasePaths[i];
-                for (let j = 0; j < basePaths.length; j++) {
-                    if (containsPath(basePaths[j], includeBasePath, path, !useCaseSensitiveFileNames)) {
-                        continue include;
-                    }
+            for (const includeBasePath of includeBasePaths) {
+                if (ts.every(basePaths, basePath => !containsPath(basePath, includeBasePath, path, !useCaseSensitiveFileNames))) {
+                    basePaths.push(includeBasePath);
                 }
-
-                basePaths.push(includeBasePath);
             }
         }
 
         return basePaths;
     }
 
+    function getIncludeBasePath(absolute: string): string {
+        const wildcardOffset = indexOfAnyCharCode(absolute, wildcardCharCodes);
+        if (wildcardOffset < 0) {
+            // No "*" or "?" in the path
+            return !hasExtension(absolute)
+                ? absolute
+                : removeTrailingDirectorySeparator(getDirectoryPath(absolute));
+        }
+        return absolute.substring(0, absolute.lastIndexOf(directorySeparator, wildcardOffset));
+    }
+
     export function ensureScriptKind(fileName: string, scriptKind?: ScriptKind): ScriptKind {
         // Using scriptKind as a condition handles both:
         // - 'scriptKind' is unspecified and thus it is `undefined`
@@ -1686,14 +2131,16 @@ namespace ts {
     export function getScriptKindFromFileName(fileName: string): ScriptKind {
         const ext = fileName.substr(fileName.lastIndexOf("."));
         switch (ext.toLowerCase()) {
-            case ".js":
+            case Extension.Js:
                 return ScriptKind.JS;
-            case ".jsx":
+            case Extension.Jsx:
                 return ScriptKind.JSX;
-            case ".ts":
+            case Extension.Ts:
                 return ScriptKind.TS;
-            case ".tsx":
+            case Extension.Tsx:
                 return ScriptKind.TSX;
+            case ".json":
+                return ScriptKind.JSON;
             default:
                 return ScriptKind.Unknown;
         }
@@ -1702,14 +2149,24 @@ namespace ts {
     /**
      *  List of supported extensions in order of file resolution precedence.
      */
-    export const supportedTypeScriptExtensions = [".ts", ".tsx", ".d.ts"];
+    export const supportedTypeScriptExtensions = [Extension.Ts, Extension.Tsx, Extension.Dts];
     /** Must have ".d.ts" first because if ".ts" goes first, that will be detected as the extension instead of ".d.ts". */
-    export const supportedTypescriptExtensionsForExtractExtension = [".d.ts", ".ts", ".tsx"];
-    export const supportedJavascriptExtensions = [".js", ".jsx"];
-    const allSupportedExtensions  = supportedTypeScriptExtensions.concat(supportedJavascriptExtensions);
+    export const supportedTypescriptExtensionsForExtractExtension = [Extension.Dts, Extension.Ts, Extension.Tsx];
+    export const supportedJavascriptExtensions = [Extension.Js, Extension.Jsx];
+    const allSupportedExtensions = supportedTypeScriptExtensions.concat(supportedJavascriptExtensions);
 
-    export function getSupportedExtensions(options?: CompilerOptions): string[] {
-        return options && options.allowJs ? allSupportedExtensions : supportedTypeScriptExtensions;
+    export function getSupportedExtensions(options?: CompilerOptions, extraFileExtensions?: JsFileExtensionInfo[]): string[] {
+        const needAllExtensions = options && options.allowJs;
+        if (!extraFileExtensions || extraFileExtensions.length === 0 || !needAllExtensions) {
+            return needAllExtensions ? allSupportedExtensions : supportedTypeScriptExtensions;
+        }
+        const extensions: string[] = allSupportedExtensions.slice(0);
+        for (const extInfo of extraFileExtensions) {
+            if (extensions.indexOf(extInfo.extension) === -1) {
+                extensions.push(extInfo.extension);
+            }
+        }
+        return extensions;
     }
 
     export function hasJavaScriptFileExtension(fileName: string) {
@@ -1720,10 +2177,10 @@ namespace ts {
         return forEach(supportedTypeScriptExtensions, extension => fileExtensionIs(fileName, extension));
     }
 
-    export function isSupportedSourceFileName(fileName: string, compilerOptions?: CompilerOptions) {
+    export function isSupportedSourceFileName(fileName: string, compilerOptions?: CompilerOptions, extraFileExtensions?: JsFileExtensionInfo[]) {
         if (!fileName) { return false; }
 
-        for (const extension of getSupportedExtensions(compilerOptions)) {
+        for (const extension of getSupportedExtensions(compilerOptions, extraFileExtensions)) {
             if (fileExtensionIs(fileName, extension)) {
                 return true;
             }
@@ -1739,7 +2196,6 @@ namespace ts {
     export const enum ExtensionPriority {
         TypeScriptFiles = 0,
         DeclarationAndJavaScriptFiles = 2,
-        Limit = 5,
 
         Highest = TypeScriptFiles,
         Lowest = DeclarationAndJavaScriptFiles,
@@ -1748,7 +2204,7 @@ namespace ts {
     export function getExtensionPriority(path: string, supportedExtensions: string[]): ExtensionPriority {
         for (let i = supportedExtensions.length - 1; i >= 0; i--) {
             if (fileExtensionIs(path, supportedExtensions[i])) {
-                return adjustExtensionPriority(<ExtensionPriority>i);
+                return adjustExtensionPriority(<ExtensionPriority>i, supportedExtensions);
             }
         }
 
@@ -1760,31 +2216,30 @@ namespace ts {
     /**
      * Adjusts an extension priority to be the highest priority within the same range.
      */
-    export function adjustExtensionPriority(extensionPriority: ExtensionPriority): ExtensionPriority {
+    export function adjustExtensionPriority(extensionPriority: ExtensionPriority, supportedExtensions: string[]): ExtensionPriority {
         if (extensionPriority < ExtensionPriority.DeclarationAndJavaScriptFiles) {
             return ExtensionPriority.TypeScriptFiles;
         }
-        else if (extensionPriority < ExtensionPriority.Limit) {
+        else if (extensionPriority < supportedExtensions.length) {
             return ExtensionPriority.DeclarationAndJavaScriptFiles;
         }
         else {
-            return ExtensionPriority.Limit;
-        }
-    }
+            return supportedExtensions.length;
+        }    }
 
     /**
      * Gets the next lowest extension priority for a given priority.
      */
-    export function getNextLowestExtensionPriority(extensionPriority: ExtensionPriority): ExtensionPriority {
+    export function getNextLowestExtensionPriority(extensionPriority: ExtensionPriority, supportedExtensions: string[]): ExtensionPriority {
         if (extensionPriority < ExtensionPriority.DeclarationAndJavaScriptFiles) {
             return ExtensionPriority.DeclarationAndJavaScriptFiles;
         }
         else {
-            return ExtensionPriority.Limit;
+            return supportedExtensions.length;
         }
     }
 
-    const extensionsToRemove = [".d.ts", ".ts", ".js", ".tsx", ".jsx"];
+    const extensionsToRemove = [Extension.Dts, Extension.Ts, Extension.Js, Extension.Tsx, Extension.Jsx];
     export function removeFileExtension(path: string): string {
         for (const ext of extensionsToRemove) {
             const extensionless = tryRemoveExtension(path, ext);
@@ -1803,22 +2258,19 @@ namespace ts {
         return path.substring(0, path.length - extension.length);
     }
 
-    export function isJsxOrTsxExtension(ext: string): boolean {
-        return ext === ".jsx" || ext === ".tsx";
-    }
-
     export function changeExtension<T extends string | Path>(path: T, newExtension: string): T {
         return <T>(removeFileExtension(path) + newExtension);
     }
 
     export interface ObjectAllocator {
         getNodeConstructor(): new (kind: SyntaxKind, pos?: number, end?: number) => Node;
-        getTokenConstructor(): new (kind: SyntaxKind, pos?: number, end?: number) => Token;
-        getIdentifierConstructor(): new (kind: SyntaxKind, pos?: number, end?: number) => Token;
-        getSourceFileConstructor(): new (kind: SyntaxKind, pos?: number, end?: number) => SourceFile;
+        getTokenConstructor(): new <TKind extends SyntaxKind>(kind: TKind, pos?: number, end?: number) => Token<TKind>;
+        getIdentifierConstructor(): new (kind: SyntaxKind.Identifier, pos?: number, end?: number) => Identifier;
+        getSourceFileConstructor(): new (kind: SyntaxKind.SourceFile, pos?: number, end?: number) => SourceFile;
         getSymbolConstructor(): new (flags: SymbolFlags, name: string) => Symbol;
         getTypeConstructor(): new (checker: TypeChecker, flags: TypeFlags) => Type;
         getSignatureConstructor(): new (checker: TypeChecker) => Signature;
+        getSourceMapSourceConstructor(): new (fileName: string, text: string, skipTrivia?: (pos: number) => number) => SourceMapSource;
     }
 
     function Symbol(this: Symbol, flags: SymbolFlags, name: string) {
@@ -1829,9 +2281,12 @@ namespace ts {
 
     function Type(this: Type, checker: TypeChecker, flags: TypeFlags) {
         this.flags = flags;
+        if (Debug.isDebugging) {
+            this.checker = checker;
+        }
     }
 
-    function Signature(checker: TypeChecker) {
+    function Signature() {
     }
 
     function Node(this: Node, kind: SyntaxKind, pos: number, end: number) {
@@ -1846,6 +2301,12 @@ namespace ts {
         this.original = undefined;
     }
 
+    function SourceMapSource(this: SourceMapSource, fileName: string, text: string, skipTrivia?: (pos: number) => number) {
+        this.fileName = fileName;
+        this.text = text;
+        this.skipTrivia = skipTrivia || (pos => pos);
+    }
+
     export let objectAllocator: ObjectAllocator = {
         getNodeConstructor: () => <any>Node,
         getTokenConstructor: () => <any>Node,
@@ -1853,7 +2314,8 @@ namespace ts {
         getSourceFileConstructor: () => <any>Node,
         getSymbolConstructor: () => <any>Symbol,
         getTypeConstructor: () => <any>Type,
-        getSignatureConstructor: () => <any>Signature
+        getSignatureConstructor: () => <any>Signature,
+        getSourceMapSourceConstructor: () => <any>SourceMapSource,
     };
 
     export const enum AssertionLevel {
@@ -1864,61 +2326,58 @@ namespace ts {
     }
 
     export namespace Debug {
-        declare var process: any;
-        declare var require: any;
-
-        let currentAssertionLevel: AssertionLevel;
+        export let currentAssertionLevel = AssertionLevel.None;
+        export let isDebugging = false;
 
         export function shouldAssert(level: AssertionLevel): boolean {
-            return getCurrentAssertionLevel() >= level;
+            return currentAssertionLevel >= level;
         }
 
-        export function assert(expression: boolean, message?: string, verboseDebugInfo?: () => string): void {
+        export function assert(expression: boolean, message?: string, verboseDebugInfo?: () => string, stackCrawlMark?: Function): void {
             if (!expression) {
-                let verboseDebugString = "";
                 if (verboseDebugInfo) {
-                    verboseDebugString = "\r\nVerbose Debug Information: " + verboseDebugInfo();
+                    message += "\r\nVerbose Debug Information: " + verboseDebugInfo();
                 }
-                debugger;
-                throw new Error("Debug Failure. False expression: " + (message || "") + verboseDebugString);
+                fail(message ? "False expression: " + message : "False expression.", stackCrawlMark || assert);
             }
         }
 
-        export function fail(message?: string): void {
-            Debug.assert(/*expression*/ false, message);
+        export function fail(message?: string, stackCrawlMark?: Function): void {
+            debugger;
+            const e = new Error(message ? `Debug Failure. ` : "Debug Failure.");
+            if ((<any>Error).captureStackTrace) {
+                (<any>Error).captureStackTrace(e, stackCrawlMark || fail);
+            }
+            throw e;
         }
 
-        function getCurrentAssertionLevel() {
-            if (currentAssertionLevel !== undefined) {
-                return currentAssertionLevel;
+        export function getFunctionName(func: Function) {
+            if (typeof func !== "function") {
+                return "";
             }
-
-            if (sys === undefined) {
-                return AssertionLevel.None;
+            else if (func.hasOwnProperty("name")) {
+                return (<any>func).name;
+            }
+            else {
+                const text = Function.prototype.toString.call(func);
+                const match = /^function\s+([\w\$]+)\s*\(/.exec(text);
+                return match ? match[1] : "";
             }
-
-            const developmentMode = /^development$/i.test(getEnvironmentVariable("NODE_ENV"));
-            currentAssertionLevel = developmentMode
-                ? AssertionLevel.Normal
-                : AssertionLevel.None;
-
-            return currentAssertionLevel;
         }
     }
 
-    export function getEnvironmentVariable(name: string, host?: CompilerHost) {
-        if (host && host.getEnvironmentVariable) {
-            return host.getEnvironmentVariable(name);
-        }
-
-        if (sys && sys.getEnvironmentVariable) {
-            return sys.getEnvironmentVariable(name);
+    /** Remove an item from an array, moving everything to its right one space left. */
+    export function orderedRemoveItem<T>(array: T[], item: T): boolean {
+        for (let i = 0; i < array.length; i++) {
+            if (array[i] === item) {
+                orderedRemoveItemAt(array, i);
+                return true;
+            }
         }
-
-        return "";
+        return false;
     }
 
-    /** Remove an item from an array, moving everything to its right one space left. */
+    /** Remove an item by index from an array, moving everything to its right one space left. */
     export function orderedRemoveItemAt<T>(array: T[], index: number): void {
         // This seems to be faster than either `array.splice(i, 1)` or `array.copyWithin(i, i+ 1)`.
         for (let i = index; i < array.length - 1; i++) {
@@ -2031,4 +2490,28 @@ namespace ts {
         //  pos === undefined || pos === null || isNaN(pos) || pos < 0;
         return !(pos >= 0);
     }
-}
+
+    /** True if an extension is one of the supported TypeScript extensions. */
+    export function extensionIsTypeScript(ext: Extension): boolean {
+        return ext === Extension.Ts || ext === Extension.Tsx || ext === Extension.Dts;
+    }
+
+    /**
+     * Gets the extension from a path.
+     * Path must have a valid extension.
+     */
+    export function extensionFromPath(path: string): Extension {
+        const ext = tryGetExtensionFromPath(path);
+        if (ext !== undefined) {
+            return ext;
+        }
+        Debug.fail(`File ${path} has unknown extension.`);
+    }
+    export function tryGetExtensionFromPath(path: string): Extension | undefined {
+        return find(supportedTypescriptExtensionsForExtractExtension, e => fileExtensionIs(path, e)) || find(supportedJavascriptExtensions, e => fileExtensionIs(path, e));
+    }
+
+    export function isCheckJsEnabledForFile(sourceFile: SourceFile, compilerOptions: CompilerOptions) {
+        return sourceFile.checkJsDirective ? sourceFile.checkJsDirective.enabled : compilerOptions.checkJs;
+    }
+}
\ No newline at end of file
diff --git a/src/compiler/declarationEmitter.ts b/src/compiler/declarationEmitter.ts
index 4e19aaf..753080c 100644
--- a/src/compiler/declarationEmitter.ts
+++ b/src/compiler/declarationEmitter.ts
@@ -32,16 +32,18 @@ namespace ts {
 
     export function getDeclarationDiagnostics(host: EmitHost, resolver: EmitResolver, targetSourceFile: SourceFile): Diagnostic[] {
         const declarationDiagnostics = createDiagnosticCollection();
-        forEachExpectedEmitFile(host, getDeclarationDiagnosticsFromFile, targetSourceFile);
+        forEachEmittedFile(host, getDeclarationDiagnosticsFromFile, targetSourceFile);
         return declarationDiagnostics.getDiagnostics(targetSourceFile ? targetSourceFile.fileName : undefined);
 
-        function getDeclarationDiagnosticsFromFile({ declarationFilePath }: EmitFileNames, sources: SourceFile[], isBundledEmit: boolean) {
-            emitDeclarations(host, resolver, declarationDiagnostics, declarationFilePath, sources, isBundledEmit, /*emitOnlyDtsFiles*/ false);
+        function getDeclarationDiagnosticsFromFile({ declarationFilePath }: EmitFileNames, sourceFileOrBundle: SourceFile | Bundle) {
+            emitDeclarations(host, resolver, declarationDiagnostics, declarationFilePath, sourceFileOrBundle, /*emitOnlyDtsFiles*/ false);
         }
     }
 
     function emitDeclarations(host: EmitHost, resolver: EmitResolver, emitterDiagnostics: DiagnosticCollection, declarationFilePath: string,
-        sourceFiles: SourceFile[], isBundledEmit: boolean, emitOnlyDtsFiles: boolean): DeclarationEmit {
+        sourceFileOrBundle: SourceFile | Bundle, emitOnlyDtsFiles: boolean): DeclarationEmit {
+        const sourceFiles = sourceFileOrBundle.kind === SyntaxKind.Bundle ? sourceFileOrBundle.sourceFiles : [sourceFileOrBundle];
+        const isBundledEmit = sourceFileOrBundle.kind === SyntaxKind.Bundle;
         const newLine = host.getNewLine();
         const compilerOptions = host.getCompilerOptions();
 
@@ -63,9 +65,9 @@ namespace ts {
         let isCurrentFileExternalModule: boolean;
         let reportedDeclarationError = false;
         let errorNameNode: DeclarationName;
-        const emitJsDocComments = compilerOptions.removeComments ? function (declaration: Node) { } : writeJsDocComments;
+        const emitJsDocComments = compilerOptions.removeComments ? noop : writeJsDocComments;
         const emit = compilerOptions.stripInternal ? stripInternal : emitNode;
-        let noDeclare: boolean;
+        let needsDeclare = true;
 
         let moduleElementDeclarationEmitInfo: ModuleElementDeclarationEmitInfo[] = [];
         let asynchronousSubModuleDeclarationEmitInfo: ModuleElementDeclarationEmitInfo[];
@@ -108,11 +110,11 @@ namespace ts {
 
             resultHasExternalModuleIndicator = false;
             if (!isBundledEmit || !isExternalModule(sourceFile)) {
-                noDeclare = false;
+                needsDeclare = true;
                 emitSourceFile(sourceFile);
             }
             else if (isExternalModule(sourceFile)) {
-                noDeclare = true;
+                needsDeclare = false;
                 write(`declare module "${getResolvedExternalModuleName(host, sourceFile)}" {`);
                 writeLine();
                 increaseIndent();
@@ -156,9 +158,9 @@ namespace ts {
         });
 
         if (usedTypeDirectiveReferences) {
-            for (const directive in usedTypeDirectiveReferences) {
+            forEachKey(usedTypeDirectiveReferences, directive => {
                 referencesOutput += `/// <reference types="${directive}" />${newLine}`;
-            }
+            });
         }
 
         return {
@@ -188,12 +190,14 @@ namespace ts {
             const writer = <EmitTextWriterWithSymbolWriter>createTextWriter(newLine);
             writer.trackSymbol = trackSymbol;
             writer.reportInaccessibleThisError = reportInaccessibleThisError;
+            writer.reportPrivateInBaseOfClassExpression = reportPrivateInBaseOfClassExpression;
             writer.writeKeyword = writer.write;
             writer.writeOperator = writer.write;
             writer.writePunctuation = writer.write;
             writer.writeSpace = writer.write;
             writer.writeStringLiteral = writer.writeLiteral;
             writer.writeParameter = writer.write;
+            writer.writeProperty = writer.write;
             writer.writeSymbol = writer.write;
             setWriter(writer);
         }
@@ -270,8 +274,8 @@ namespace ts {
                 usedTypeDirectiveReferences = createMap<string>();
             }
             for (const directive of typeReferenceDirectives) {
-                if (!(directive in usedTypeDirectiveReferences)) {
-                    usedTypeDirectiveReferences[directive] = directive;
+                if (!usedTypeDirectiveReferences.has(directive)) {
+                    usedTypeDirectiveReferences.set(directive, directive);
                 }
             }
         }
@@ -310,6 +314,14 @@ namespace ts {
             recordTypeReferenceDirectivesIfNecessary(resolver.getTypeReferenceDirectivesForSymbol(symbol, meaning));
         }
 
+        function reportPrivateInBaseOfClassExpression(propertyName: string) {
+            if (errorNameNode) {
+                reportedDeclarationError = true;
+                emitterDiagnostics.add(
+                    createDiagnosticForNode(errorNameNode, Diagnostics.Property_0_of_exported_class_expression_may_not_be_private_or_protected, propertyName));
+            }
+        }
+
         function reportInaccessibleThisError() {
             if (errorNameNode) {
                 reportedDeclarationError = true;
@@ -321,13 +333,25 @@ namespace ts {
         function writeTypeOfDeclaration(declaration: AccessorDeclaration | VariableLikeDeclaration, type: TypeNode, getSymbolAccessibilityDiagnostic: GetSymbolAccessibilityDiagnostic) {
             writer.getSymbolAccessibilityDiagnostic = getSymbolAccessibilityDiagnostic;
             write(": ");
-            if (type) {
+
+            // use the checker's type, not the declared type,
+            // for optional parameter properties
+            // and also for non-optional initialized parameters that aren't a parameter property
+            // these types may need to add `undefined`.
+            const shouldUseResolverType = declaration.kind === SyntaxKind.Parameter &&
+                (resolver.isRequiredInitializedParameter(declaration as ParameterDeclaration) ||
+                 resolver.isOptionalUninitializedParameterProperty(declaration as ParameterDeclaration));
+            if (type && !shouldUseResolverType) {
                 // Write the type
                 emitType(type);
             }
             else {
                 errorNameNode = declaration.name;
-                resolver.writeTypeOfDeclaration(declaration, enclosingDeclaration, TypeFormatFlags.UseTypeOfFunction | TypeFormatFlags.UseTypeAliasValue, writer);
+                const format = TypeFormatFlags.UseTypeOfFunction |
+                    TypeFormatFlags.WriteClassExpressionAsTypeLiteral |
+                    TypeFormatFlags.UseTypeAliasValue |
+                    (shouldUseResolverType ? TypeFormatFlags.AddUndefined : 0);
+                resolver.writeTypeOfDeclaration(declaration, enclosingDeclaration, format, writer);
                 errorNameNode = undefined;
             }
         }
@@ -341,7 +365,11 @@ namespace ts {
             }
             else {
                 errorNameNode = signature.name;
-                resolver.writeReturnTypeOfSignatureDeclaration(signature, enclosingDeclaration, TypeFormatFlags.UseTypeOfFunction | TypeFormatFlags.UseTypeAliasValue, writer);
+                resolver.writeReturnTypeOfSignatureDeclaration(
+                    signature,
+                    enclosingDeclaration,
+                    TypeFormatFlags.UseTypeOfFunction | TypeFormatFlags.UseTypeAliasValue | TypeFormatFlags.WriteClassExpressionAsTypeLiteral,
+                    writer);
                 errorNameNode = undefined;
             }
         }
@@ -371,7 +399,7 @@ namespace ts {
 
         function writeJsDocComments(declaration: Node) {
             if (declaration) {
-                const jsDocComments = getJsDocCommentsFromText(declaration, currentText);
+                const jsDocComments = getJSDocCommentRanges(declaration, currentText);
                 emitNewLineBeforeLeadingComments(currentLineMap, writer, declaration, jsDocComments);
                 // jsDoc comments are emitted at /*leading comment1 */space/*leading comment*/space
                 emitComments(currentText, currentLineMap, writer, jsDocComments, /*leadingSeparator*/ false, /*trailingSeparator*/ true, newLine, writeCommentRange);
@@ -389,6 +417,7 @@ namespace ts {
                 case SyntaxKind.StringKeyword:
                 case SyntaxKind.NumberKeyword:
                 case SyntaxKind.BooleanKeyword:
+                case SyntaxKind.ObjectKeyword:
                 case SyntaxKind.SymbolKeyword:
                 case SyntaxKind.VoidKeyword:
                 case SyntaxKind.UndefinedKeyword:
@@ -413,6 +442,12 @@ namespace ts {
                     return emitIntersectionType(<IntersectionTypeNode>type);
                 case SyntaxKind.ParenthesizedType:
                     return emitParenType(<ParenthesizedTypeNode>type);
+                case SyntaxKind.TypeOperator:
+                    return emitTypeOperator(<TypeOperatorNode>type);
+                case SyntaxKind.IndexedAccessType:
+                    return emitIndexedAccessType(<IndexedAccessTypeNode>type);
+                case SyntaxKind.MappedType:
+                    return emitMappedType(<MappedTypeNode>type);
                 case SyntaxKind.FunctionType:
                 case SyntaxKind.ConstructorType:
                     return emitSignatureDeclarationWithJsDocComments(<FunctionOrConstructorTypeNode>type);
@@ -506,6 +541,45 @@ namespace ts {
                 write(")");
             }
 
+            function emitTypeOperator(type: TypeOperatorNode) {
+                write(tokenToString(type.operator));
+                write(" ");
+                emitType(type.type);
+            }
+
+            function emitIndexedAccessType(node: IndexedAccessTypeNode) {
+                emitType(node.objectType);
+                write("[");
+                emitType(node.indexType);
+                write("]");
+            }
+
+            function emitMappedType(node: MappedTypeNode) {
+                const prevEnclosingDeclaration = enclosingDeclaration;
+                enclosingDeclaration = node;
+                write("{");
+                writeLine();
+                increaseIndent();
+                if (node.readonlyToken) {
+                    write("readonly ");
+                }
+                write("[");
+                writeEntityName(node.typeParameter.name);
+                write(" in ");
+                emitType(node.typeParameter.constraint);
+                write("]");
+                if (node.questionToken) {
+                    write("?");
+                }
+                write(": ");
+                emitType(node.type);
+                write(";");
+                writeLine();
+                decreaseIndent();
+                write("}");
+                enclosingDeclaration = prevEnclosingDeclaration;
+            }
+
             function emitTypeLiteral(type: TypeLiteralNode) {
                 write("{");
                 if (type.members.length) {
@@ -525,47 +599,57 @@ namespace ts {
             currentIdentifiers = node.identifiers;
             isCurrentFileExternalModule = isExternalModule(node);
             enclosingDeclaration = node;
-            emitDetachedComments(currentText, currentLineMap, writer, writeCommentRange, node, newLine, true /* remove comments */);
+            emitDetachedComments(currentText, currentLineMap, writer, writeCommentRange, node, newLine, /*removeComments*/ true);
             emitLines(node.statements);
         }
 
-        // Return a temp variable name to be used in `export default` statements.
+        // Return a temp variable name to be used in `export default`/`export class ... extends` statements.
         // The temp name will be of the form _default_counter.
         // Note that export default is only allowed at most once in a module, so we
         // do not need to keep track of created temp names.
-        function getExportDefaultTempVariableName(): string {
-            const baseName = "_default";
-            if (!(baseName in currentIdentifiers)) {
+        function getExportTempVariableName(baseName: string): string {
+            if (!currentIdentifiers.has(baseName)) {
                 return baseName;
             }
             let count = 0;
             while (true) {
                 count++;
                 const name = baseName + "_" + count;
-                if (!(name in currentIdentifiers)) {
+                if (!currentIdentifiers.has(name)) {
                     return name;
                 }
             }
         }
 
+        function emitTempVariableDeclaration(expr: Expression, baseName: string, diagnostic: SymbolAccessibilityDiagnostic, needsDeclare: boolean): string {
+            const tempVarName = getExportTempVariableName(baseName);
+            if (needsDeclare) {
+                write("declare ");
+            }
+            write("const ");
+            write(tempVarName);
+            write(": ");
+            writer.getSymbolAccessibilityDiagnostic = () => diagnostic;
+            resolver.writeTypeOfExpression(
+                expr,
+                enclosingDeclaration,
+                TypeFormatFlags.UseTypeOfFunction | TypeFormatFlags.UseTypeAliasValue | TypeFormatFlags.WriteClassExpressionAsTypeLiteral,
+                writer);
+            write(";");
+            writeLine();
+            return tempVarName;
+        }
+
         function emitExportAssignment(node: ExportAssignment) {
             if (node.expression.kind === SyntaxKind.Identifier) {
                 write(node.isExportEquals ? "export = " : "export default ");
                 writeTextOfNode(currentText, node.expression);
             }
             else {
-                // Expression
-                const tempVarName = getExportDefaultTempVariableName();
-                if (!noDeclare) {
-                    write("declare ");
-                }
-                write("var ");
-                write(tempVarName);
-                write(": ");
-                writer.getSymbolAccessibilityDiagnostic = getDefaultExportAccessibilityDiagnostic;
-                resolver.writeTypeOfExpression(node.expression, enclosingDeclaration, TypeFormatFlags.UseTypeOfFunction | TypeFormatFlags.UseTypeAliasValue, writer);
-                write(";");
-                writeLine();
+                const tempVarName = emitTempVariableDeclaration(node.expression, "_default", {
+                    diagnosticMessage: Diagnostics.Default_export_of_the_module_has_or_is_using_private_name_0,
+                    errorNode: node
+                }, needsDeclare);
                 write(node.isExportEquals ? "export = " : "export default ");
                 write(tempVarName);
             }
@@ -579,13 +663,6 @@ namespace ts {
                 // write each of these declarations asynchronously
                 writeAsynchronousModuleElements(nodes);
             }
-
-            function getDefaultExportAccessibilityDiagnostic(diagnostic: SymbolAccessibilityResult): SymbolAccessibilityDiagnostic {
-                return {
-                    diagnosticMessage: Diagnostics.Default_export_of_the_module_has_or_is_using_private_name_0,
-                    errorNode: node
-                };
-            }
         }
 
         function isModuleElementVisible(node: Declaration) {
@@ -664,7 +741,7 @@ namespace ts {
                 if (modifiers & ModifierFlags.Default) {
                     write("default ");
                 }
-                else if (node.kind !== SyntaxKind.InterfaceDeclaration && !noDeclare) {
+                else if (node.kind !== SyntaxKind.InterfaceDeclaration && needsDeclare) {
                     write("declare ");
                 }
             }
@@ -710,7 +787,7 @@ namespace ts {
             }
             writer.writeLine();
 
-            function getImportEntityNameVisibilityError(symbolAccessibilityResult: SymbolAccessibilityResult): SymbolAccessibilityDiagnostic {
+            function getImportEntityNameVisibilityError(): SymbolAccessibilityDiagnostic {
                 return {
                     diagnosticMessage: Diagnostics.Import_declaration_0_is_using_private_name_1,
                     errorNode: node,
@@ -888,7 +965,7 @@ namespace ts {
             writeLine();
             enclosingDeclaration = prevEnclosingDeclaration;
 
-            function getTypeAliasDeclarationVisibilityError(symbolAccessibilityResult: SymbolAccessibilityResult): SymbolAccessibilityDiagnostic {
+            function getTypeAliasDeclarationVisibilityError(): SymbolAccessibilityDiagnostic {
                 return {
                     diagnosticMessage: Diagnostics.Exported_type_alias_0_has_or_is_using_private_name_1,
                     errorNode: node.type,
@@ -920,7 +997,7 @@ namespace ts {
             const enumMemberValue = resolver.getConstantValue(node);
             if (enumMemberValue !== undefined) {
                 write(" = ");
-                write(enumMemberValue.toString());
+                write(getTextOfConstantValue(enumMemberValue));
             }
             write(",");
             writeLine();
@@ -954,8 +1031,25 @@ namespace ts {
                         emitTypeWithNewGetSymbolAccessibilityDiagnostic(node.constraint, getTypeParameterConstraintVisibilityError);
                     }
                 }
+                if (node.default && !isPrivateMethodTypeParameter(node)) {
+                    write(" = ");
+                    if (node.parent.kind === SyntaxKind.FunctionType ||
+                        node.parent.kind === SyntaxKind.ConstructorType ||
+                        (node.parent.parent && node.parent.parent.kind === SyntaxKind.TypeLiteral)) {
+                        Debug.assert(node.parent.kind === SyntaxKind.MethodDeclaration ||
+                            node.parent.kind === SyntaxKind.MethodSignature ||
+                            node.parent.kind === SyntaxKind.FunctionType ||
+                            node.parent.kind === SyntaxKind.ConstructorType ||
+                            node.parent.kind === SyntaxKind.CallSignature ||
+                            node.parent.kind === SyntaxKind.ConstructSignature);
+                        emitType(node.default);
+                    }
+                    else {
+                        emitTypeWithNewGetSymbolAccessibilityDiagnostic(node.default, getTypeParameterConstraintVisibilityError);
+                    }
+                }
 
-                function getTypeParameterConstraintVisibilityError(symbolAccessibilityResult: SymbolAccessibilityResult): SymbolAccessibilityDiagnostic {
+                function getTypeParameterConstraintVisibilityError(): SymbolAccessibilityDiagnostic {
                     // Type parameter constraints are named by user so we should always be able to name it
                     let diagnosticMessage: DiagnosticMessage;
                     switch (node.parent.kind) {
@@ -992,6 +1086,10 @@ namespace ts {
                             diagnosticMessage = Diagnostics.Type_parameter_0_of_exported_function_has_or_is_using_private_name_1;
                             break;
 
+                        case SyntaxKind.TypeAliasDeclaration:
+                            diagnosticMessage = Diagnostics.Type_parameter_0_of_exported_type_alias_has_or_is_using_private_name_1;
+                            break;
+
                         default:
                             Debug.fail("This is unknown parent for type parameter: " + node.parent.kind);
                     }
@@ -1024,29 +1122,25 @@ namespace ts {
                 else if (!isImplementsList && node.expression.kind === SyntaxKind.NullKeyword) {
                     write("null");
                 }
-                else {
-                    writer.getSymbolAccessibilityDiagnostic = getHeritageClauseVisibilityError;
-                    resolver.writeBaseConstructorTypeOfClass(<ClassLikeDeclaration>enclosingDeclaration, enclosingDeclaration, TypeFormatFlags.UseTypeOfFunction | TypeFormatFlags.UseTypeAliasValue, writer);
-                }
 
-                function getHeritageClauseVisibilityError(symbolAccessibilityResult: SymbolAccessibilityResult): SymbolAccessibilityDiagnostic {
+                function getHeritageClauseVisibilityError(): SymbolAccessibilityDiagnostic {
                     let diagnosticMessage: DiagnosticMessage;
                     // Heritage clause is written by user so it can always be named
                     if (node.parent.parent.kind === SyntaxKind.ClassDeclaration) {
                         // Class or Interface implemented/extended is inaccessible
                         diagnosticMessage = isImplementsList ?
                             Diagnostics.Implements_clause_of_exported_class_0_has_or_is_using_private_name_1 :
-                            Diagnostics.Extends_clause_of_exported_class_0_has_or_is_using_private_name_1;
+                            Diagnostics.extends_clause_of_exported_class_0_has_or_is_using_private_name_1;
                     }
                     else {
                         // interface is inaccessible
-                        diagnosticMessage = Diagnostics.Extends_clause_of_exported_interface_0_has_or_is_using_private_name_1;
+                        diagnosticMessage = Diagnostics.extends_clause_of_exported_interface_0_has_or_is_using_private_name_1;
                     }
 
                     return {
                         diagnosticMessage,
                         errorNode: node,
-                        typeName: (<Declaration>node.parent.parent).name
+                        typeName: getNameOfDeclaration(node.parent.parent)
                     };
                 }
             }
@@ -1063,20 +1157,41 @@ namespace ts {
                 }
             }
 
+            const prevEnclosingDeclaration = enclosingDeclaration;
+            enclosingDeclaration = node;
+            const baseTypeNode = getClassExtendsHeritageClauseElement(node);
+            let tempVarName: string;
+            if (baseTypeNode && !isEntityNameExpression(baseTypeNode.expression)) {
+                tempVarName = baseTypeNode.expression.kind === SyntaxKind.NullKeyword ?
+                    "null" :
+                    emitTempVariableDeclaration(baseTypeNode.expression, `${node.name.text}_base`, {
+                        diagnosticMessage: Diagnostics.extends_clause_of_exported_class_0_has_or_is_using_private_name_1,
+                        errorNode: baseTypeNode,
+                        typeName: node.name
+                    }, !findAncestor(node, n => n.kind === SyntaxKind.ModuleDeclaration));
+            }
+
             emitJsDocComments(node);
             emitModuleElementDeclarationFlags(node);
             if (hasModifier(node, ModifierFlags.Abstract)) {
                 write("abstract ");
             }
-
             write("class ");
             writeTextOfNode(currentText, node.name);
-            const prevEnclosingDeclaration = enclosingDeclaration;
-            enclosingDeclaration = node;
             emitTypeParameters(node.typeParameters);
-            const baseTypeNode = getClassExtendsHeritageClauseElement(node);
             if (baseTypeNode) {
-                emitHeritageClause([baseTypeNode], /*isImplementsList*/ false);
+                if (!isEntityNameExpression(baseTypeNode.expression)) {
+                    write(" extends ");
+                    write(tempVarName);
+                    if (baseTypeNode.typeArguments) {
+                        write("<");
+                        emitCommaList(baseTypeNode.typeArguments, emitType);
+                        write(">");
+                    }
+                }
+                else  {
+                    emitHeritageClause([baseTypeNode], /*isImplementsList*/ false);
+                }
             }
             emitHeritageClause(getClassImplementsHeritageClauseElements(node), /*isImplementsList*/ true);
             write(" {");
@@ -1098,7 +1213,10 @@ namespace ts {
             const prevEnclosingDeclaration = enclosingDeclaration;
             enclosingDeclaration = node;
             emitTypeParameters(node.typeParameters);
-            emitHeritageClause(getInterfaceBaseTypeNodes(node), /*isImplementsList*/ false);
+            const interfaceExtendsTypes = filter(getInterfaceBaseTypeNodes(node), base => isEntityNameExpression(base.expression));
+            if (interfaceExtendsTypes && interfaceExtendsTypes.length) {
+                emitHeritageClause(interfaceExtendsTypes, /*isImplementsList*/ false);
+            }
             write(" {");
             writeLine();
             increaseIndent();
@@ -1121,7 +1239,7 @@ namespace ts {
             writeLine();
         }
 
-        function emitVariableDeclaration(node: VariableDeclaration) {
+        function emitVariableDeclaration(node: VariableDeclaration | PropertyDeclaration | PropertySignature | ParameterDeclaration) {
             // If we are emitting property it isn't moduleElement and hence we already know it needs to be emitted
             // so there is no check needed to see if declaration is visible
             if (node.kind !== SyntaxKind.VariableDeclaration || resolver.isDeclarationVisible(node)) {
@@ -1136,7 +1254,7 @@ namespace ts {
                     // If optional property emit ? but in the case of parameterProperty declaration with "?" indicating optional parameter for the constructor
                     // we don't want to emit property declaration with "?"
                     if ((node.kind === SyntaxKind.PropertyDeclaration || node.kind === SyntaxKind.PropertySignature ||
-                        (node.kind === SyntaxKind.Parameter && !isParameterPropertyDeclaration(node))) && hasQuestionToken(node)) {
+                        (node.kind === SyntaxKind.Parameter && !isParameterPropertyDeclaration(<ParameterDeclaration>node))) && hasQuestionToken(node)) {
                         write("?");
                     }
                     if ((node.kind === SyntaxKind.PropertyDeclaration || node.kind === SyntaxKind.PropertySignature) && node.parent.kind === SyntaxKind.TypeLiteral) {
@@ -1161,7 +1279,9 @@ namespace ts {
                         Diagnostics.Exported_variable_0_has_or_is_using_private_name_1;
                 }
                 // This check is to ensure we don't report error on constructor parameter property as that error would be reported during parameter emit
-                else if (node.kind === SyntaxKind.PropertyDeclaration || node.kind === SyntaxKind.PropertySignature) {
+                // The only exception here is if the constructor was marked as private. we are not emitting the constructor parameters at all.
+                else if (node.kind === SyntaxKind.PropertyDeclaration || node.kind === SyntaxKind.PropertySignature ||
+                    (node.kind === SyntaxKind.Parameter && hasModifier(node.parent, ModifierFlags.Private))) {
                     // TODO(jfreeman): Deal with computed properties in error reporting.
                     if (hasModifier(node, ModifierFlags.Static)) {
                         return symbolAccessibilityResult.errorModuleName ?
@@ -1170,7 +1290,7 @@ namespace ts {
                                 Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2 :
                             Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_private_name_1;
                     }
-                    else if (node.parent.kind === SyntaxKind.ClassDeclaration) {
+                    else if (node.parent.kind === SyntaxKind.ClassDeclaration || node.kind === SyntaxKind.Parameter) {
                         return symbolAccessibilityResult.errorModuleName ?
                             symbolAccessibilityResult.accessibility === SymbolAccessibility.CannotBeNamed ?
                                 Diagnostics.Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
@@ -1396,6 +1516,11 @@ namespace ts {
                 write("[");
             }
             else {
+                if (node.kind === SyntaxKind.Constructor && hasModifier(node, ModifierFlags.Private)) {
+                    write("();");
+                    writeLine();
+                    return;
+                }
                 // Construct signature or constructor type write new Signature
                 if (node.kind === SyntaxKind.ConstructSignature || node.kind === SyntaxKind.ConstructorType) {
                     write("new ");
@@ -1573,6 +1698,12 @@ namespace ts {
                             Diagnostics.Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
                             Diagnostics.Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1;
 
+                    case SyntaxKind.IndexSignature:
+                        // Interfaces cannot have parameter types that cannot be named
+                        return symbolAccessibilityResult.errorModuleName ?
+                            Diagnostics.Parameter_0_of_index_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
+                            Diagnostics.Parameter_0_of_index_signature_from_exported_interface_has_or_is_using_private_name_1;
+
                     case SyntaxKind.MethodDeclaration:
                     case SyntaxKind.MethodSignature:
                         if (hasModifier(node.parent, ModifierFlags.Static)) {
@@ -1626,8 +1757,7 @@ namespace ts {
                 }
             }
 
-            function emitBindingElement(bindingElement: BindingElement) {
-
+            function emitBindingElement(bindingElement: BindingElement | OmittedExpression) {
                 if (bindingElement.kind === SyntaxKind.OmittedExpression) {
                     // If bindingElement is an omittedExpression (i.e. containing elision),
                     // we will emit blank space (although this may differ from users' original code,
@@ -1723,13 +1853,13 @@ namespace ts {
         function writeReferencePath(referencedFile: SourceFile, addBundledFileReference: boolean, emitOnlyDtsFiles: boolean): boolean {
             let declFileName: string;
             let addedBundledEmitReference = false;
-            if (isDeclarationFile(referencedFile)) {
+            if (referencedFile.isDeclarationFile) {
                 // Declaration file, use declaration file name
                 declFileName = referencedFile.fileName;
             }
             else {
                 // Get the declaration file path
-                forEachExpectedEmitFile(host, getDeclFileName, referencedFile, emitOnlyDtsFiles);
+                forEachEmittedFile(host, getDeclFileName, referencedFile, emitOnlyDtsFiles);
             }
 
             if (declFileName) {
@@ -1744,8 +1874,9 @@ namespace ts {
             }
             return addedBundledEmitReference;
 
-            function getDeclFileName(emitFileNames: EmitFileNames, sourceFiles: SourceFile[], isBundledEmit: boolean) {
+            function getDeclFileName(emitFileNames: EmitFileNames, sourceFileOrBundle: SourceFile | Bundle) {
                 // Dont add reference path to this file if it is a bundled emit and caller asked not emit bundled file path
+                const isBundledEmit = sourceFileOrBundle.kind === SyntaxKind.Bundle;
                 if (isBundledEmit && !addBundledFileReference) {
                     return;
                 }
@@ -1758,10 +1889,11 @@ namespace ts {
     }
 
     /* @internal */
-    export function writeDeclarationFile(declarationFilePath: string, sourceFiles: SourceFile[], isBundledEmit: boolean, host: EmitHost, resolver: EmitResolver, emitterDiagnostics: DiagnosticCollection, emitOnlyDtsFiles: boolean) {
-        const emitDeclarationResult = emitDeclarations(host, resolver, emitterDiagnostics, declarationFilePath, sourceFiles, isBundledEmit, emitOnlyDtsFiles);
+    export function writeDeclarationFile(declarationFilePath: string, sourceFileOrBundle: SourceFile | Bundle, host: EmitHost, resolver: EmitResolver, emitterDiagnostics: DiagnosticCollection, emitOnlyDtsFiles: boolean) {
+        const emitDeclarationResult = emitDeclarations(host, resolver, emitterDiagnostics, declarationFilePath, sourceFileOrBundle, emitOnlyDtsFiles);
         const emitSkipped = emitDeclarationResult.reportedDeclarationError || host.isEmitBlocked(declarationFilePath) || host.getCompilerOptions().noEmit;
         if (!emitSkipped) {
+            const sourceFiles = sourceFileOrBundle.kind === SyntaxKind.Bundle ? sourceFileOrBundle.sourceFiles : [sourceFileOrBundle];
             const declarationOutput = emitDeclarationResult.referencesOutput
                 + getDeclarationOutput(emitDeclarationResult.synchronousDeclarationOutput, emitDeclarationResult.moduleElementDeclarationEmitInfo);
             writeFile(host, emitterDiagnostics, declarationFilePath, declarationOutput, host.getCompilerOptions().emitBOM, sourceFiles);
diff --git a/src/compiler/diagnosticInformationMap.generated.ts b/src/compiler/diagnosticInformationMap.generated.ts
index f2fb6b7..69501e9 100644
--- a/src/compiler/diagnosticInformationMap.generated.ts
+++ b/src/compiler/diagnosticInformationMap.generated.ts
@@ -2,7 +2,7 @@
 /// <reference path="types.ts" />
 /* @internal */
 namespace ts {
-    export var Diagnostics = {
+    export const Diagnostics = {
         Unterminated_string_literal: { code: 1002, category: DiagnosticCategory.Error, key: "Unterminated_string_literal_1002", message: "Unterminated string literal." },
         Identifier_expected: { code: 1003, category: DiagnosticCategory.Error, key: "Identifier_expected_1003", message: "Identifier expected." },
         _0_expected: { code: 1005, category: DiagnosticCategory.Error, key: "_0_expected_1005", message: "'{0}' expected." },
@@ -44,14 +44,14 @@ namespace ts {
         A_set_accessor_parameter_cannot_have_an_initializer: { code: 1052, category: DiagnosticCategory.Error, key: "A_set_accessor_parameter_cannot_have_an_initializer_1052", message: "A 'set' accessor parameter cannot have an initializer." },
         A_set_accessor_cannot_have_rest_parameter: { code: 1053, category: DiagnosticCategory.Error, key: "A_set_accessor_cannot_have_rest_parameter_1053", message: "A 'set' accessor cannot have rest parameter." },
         A_get_accessor_cannot_have_parameters: { code: 1054, category: DiagnosticCategory.Error, key: "A_get_accessor_cannot_have_parameters_1054", message: "A 'get' accessor cannot have parameters." },
-        Type_0_is_not_a_valid_async_function_return_type: { code: 1055, category: DiagnosticCategory.Error, key: "Type_0_is_not_a_valid_async_function_return_type_1055", message: "Type '{0}' is not a valid async function return type." },
+        Type_0_is_not_a_valid_async_function_return_type_in_ES5_SlashES3_because_it_does_not_refer_to_a_Promise_compatible_constructor_value: { code: 1055, category: DiagnosticCategory.Error, key: "Type_0_is_not_a_valid_async_function_return_type_in_ES5_SlashES3_because_it_does_not_refer_to_a_Prom_1055", message: "Type '{0}' is not a valid async function return type in ES5/ES3 because it does not refer to a Promise-compatible constructor value." },
         Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher: { code: 1056, category: DiagnosticCategory.Error, key: "Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher_1056", message: "Accessors are only available when targeting ECMAScript 5 and higher." },
         An_async_function_or_method_must_have_a_valid_awaitable_return_type: { code: 1057, category: DiagnosticCategory.Error, key: "An_async_function_or_method_must_have_a_valid_awaitable_return_type_1057", message: "An async function or method must have a valid awaitable return type." },
-        Operand_for_await_does_not_have_a_valid_callable_then_member: { code: 1058, category: DiagnosticCategory.Error, key: "Operand_for_await_does_not_have_a_valid_callable_then_member_1058", message: "Operand for 'await' does not have a valid callable 'then' member." },
-        Return_expression_in_async_function_does_not_have_a_valid_callable_then_member: { code: 1059, category: DiagnosticCategory.Error, key: "Return_expression_in_async_function_does_not_have_a_valid_callable_then_member_1059", message: "Return expression in async function does not have a valid callable 'then' member." },
-        Expression_body_for_async_arrow_function_does_not_have_a_valid_callable_then_member: { code: 1060, category: DiagnosticCategory.Error, key: "Expression_body_for_async_arrow_function_does_not_have_a_valid_callable_then_member_1060", message: "Expression body for async arrow function does not have a valid callable 'then' member." },
+        The_return_type_of_an_async_function_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member: { code: 1058, category: DiagnosticCategory.Error, key: "The_return_type_of_an_async_function_must_either_be_a_valid_promise_or_must_not_contain_a_callable_t_1058", message: "The return type of an async function must either be a valid promise or must not contain a callable 'then' member." },
+        A_promise_must_have_a_then_method: { code: 1059, category: DiagnosticCategory.Error, key: "A_promise_must_have_a_then_method_1059", message: "A promise must have a 'then' method." },
+        The_first_parameter_of_the_then_method_of_a_promise_must_be_a_callback: { code: 1060, category: DiagnosticCategory.Error, key: "The_first_parameter_of_the_then_method_of_a_promise_must_be_a_callback_1060", message: "The first parameter of the 'then' method of a promise must be a callback." },
         Enum_member_must_have_initializer: { code: 1061, category: DiagnosticCategory.Error, key: "Enum_member_must_have_initializer_1061", message: "Enum member must have initializer." },
-        _0_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method: { code: 1062, category: DiagnosticCategory.Error, key: "_0_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method_1062", message: "{0} is referenced directly or indirectly in the fulfillment callback of its own 'then' method." },
+        Type_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method: { code: 1062, category: DiagnosticCategory.Error, key: "Type_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method_1062", message: "Type is referenced directly or indirectly in the fulfillment callback of its own 'then' method." },
         An_export_assignment_cannot_be_used_in_a_namespace: { code: 1063, category: DiagnosticCategory.Error, key: "An_export_assignment_cannot_be_used_in_a_namespace_1063", message: "An export assignment cannot be used in a namespace." },
         The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type: { code: 1064, category: DiagnosticCategory.Error, key: "The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type_1064", message: "The return type of an async function or method must be the global Promise<T> type." },
         In_ambient_enum_declarations_member_initializer_must_be_constant_expression: { code: 1066, category: DiagnosticCategory.Error, key: "In_ambient_enum_declarations_member_initializer_must_be_constant_expression_1066", message: "In ambient enum declarations member initializer must be constant expression." },
@@ -60,7 +60,7 @@ namespace ts {
         _0_modifier_cannot_appear_on_an_index_signature: { code: 1071, category: DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_an_index_signature_1071", message: "'{0}' modifier cannot appear on an index signature." },
         A_0_modifier_cannot_be_used_with_an_import_declaration: { code: 1079, category: DiagnosticCategory.Error, key: "A_0_modifier_cannot_be_used_with_an_import_declaration_1079", message: "A '{0}' modifier cannot be used with an import declaration." },
         Invalid_reference_directive_syntax: { code: 1084, category: DiagnosticCategory.Error, key: "Invalid_reference_directive_syntax_1084", message: "Invalid 'reference' directive syntax." },
-        Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher: { code: 1085, category: DiagnosticCategory.Error, key: "Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher_1085", message: "Octal literals are not available when targeting ECMAScript 5 and higher." },
+        Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher_Use_the_syntax_0: { code: 1085, category: DiagnosticCategory.Error, key: "Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher_Use_the_syntax_0_1085", message: "Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '{0}'." },
         An_accessor_cannot_be_declared_in_an_ambient_context: { code: 1086, category: DiagnosticCategory.Error, key: "An_accessor_cannot_be_declared_in_an_ambient_context_1086", message: "An accessor cannot be declared in an ambient context." },
         _0_modifier_cannot_appear_on_a_constructor_declaration: { code: 1089, category: DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_constructor_declaration_1089", message: "'{0}' modifier cannot appear on a constructor declaration." },
         _0_modifier_cannot_appear_on_a_parameter: { code: 1090, category: DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_parameter_1090", message: "'{0}' modifier cannot appear on a parameter." },
@@ -76,6 +76,7 @@ namespace ts {
         Invalid_use_of_0_in_strict_mode: { code: 1100, category: DiagnosticCategory.Error, key: "Invalid_use_of_0_in_strict_mode_1100", message: "Invalid use of '{0}' in strict mode." },
         with_statements_are_not_allowed_in_strict_mode: { code: 1101, category: DiagnosticCategory.Error, key: "with_statements_are_not_allowed_in_strict_mode_1101", message: "'with' statements are not allowed in strict mode." },
         delete_cannot_be_called_on_an_identifier_in_strict_mode: { code: 1102, category: DiagnosticCategory.Error, key: "delete_cannot_be_called_on_an_identifier_in_strict_mode_1102", message: "'delete' cannot be called on an identifier in strict mode." },
+        A_for_await_of_statement_is_only_allowed_within_an_async_function_or_async_generator: { code: 1103, category: DiagnosticCategory.Error, key: "A_for_await_of_statement_is_only_allowed_within_an_async_function_or_async_generator_1103", message: "A 'for-await-of' statement is only allowed within an async function or async generator." },
         A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement: { code: 1104, category: DiagnosticCategory.Error, key: "A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement_1104", message: "A 'continue' statement can only be used within an enclosing iteration statement." },
         A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement: { code: 1105, category: DiagnosticCategory.Error, key: "A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement_1105", message: "A 'break' statement can only be used within an enclosing iteration or switch statement." },
         Jump_target_cannot_cross_function_boundary: { code: 1107, category: DiagnosticCategory.Error, key: "Jump_target_cannot_cross_function_boundary_1107", message: "Jump target cannot cross function boundary." },
@@ -83,7 +84,7 @@ namespace ts {
         Expression_expected: { code: 1109, category: DiagnosticCategory.Error, key: "Expression_expected_1109", message: "Expression expected." },
         Type_expected: { code: 1110, category: DiagnosticCategory.Error, key: "Type_expected_1110", message: "Type expected." },
         A_default_clause_cannot_appear_more_than_once_in_a_switch_statement: { code: 1113, category: DiagnosticCategory.Error, key: "A_default_clause_cannot_appear_more_than_once_in_a_switch_statement_1113", message: "A 'default' clause cannot appear more than once in a 'switch' statement." },
-        Duplicate_label_0: { code: 1114, category: DiagnosticCategory.Error, key: "Duplicate_label_0_1114", message: "Duplicate label '{0}'" },
+        Duplicate_label_0: { code: 1114, category: DiagnosticCategory.Error, key: "Duplicate_label_0_1114", message: "Duplicate label '{0}'." },
         A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement: { code: 1115, category: DiagnosticCategory.Error, key: "A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement_1115", message: "A 'continue' statement can only jump to a label of an enclosing iteration statement." },
         A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement: { code: 1116, category: DiagnosticCategory.Error, key: "A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement_1116", message: "A 'break' statement can only jump to a label of an enclosing statement." },
         An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode: { code: 1117, category: DiagnosticCategory.Error, key: "An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode_1117", message: "An object literal cannot have multiple properties with the same name in strict mode." },
@@ -115,9 +116,9 @@ namespace ts {
         Declaration_expected: { code: 1146, category: DiagnosticCategory.Error, key: "Declaration_expected_1146", message: "Declaration expected." },
         Import_declarations_in_a_namespace_cannot_reference_a_module: { code: 1147, category: DiagnosticCategory.Error, key: "Import_declarations_in_a_namespace_cannot_reference_a_module_1147", message: "Import declarations in a namespace cannot reference a module." },
         Cannot_use_imports_exports_or_module_augmentations_when_module_is_none: { code: 1148, category: DiagnosticCategory.Error, key: "Cannot_use_imports_exports_or_module_augmentations_when_module_is_none_1148", message: "Cannot use imports, exports, or module augmentations when '--module' is 'none'." },
-        File_name_0_differs_from_already_included_file_name_1_only_in_casing: { code: 1149, category: DiagnosticCategory.Error, key: "File_name_0_differs_from_already_included_file_name_1_only_in_casing_1149", message: "File name '{0}' differs from already included file name '{1}' only in casing" },
+        File_name_0_differs_from_already_included_file_name_1_only_in_casing: { code: 1149, category: DiagnosticCategory.Error, key: "File_name_0_differs_from_already_included_file_name_1_only_in_casing_1149", message: "File name '{0}' differs from already included file name '{1}' only in casing." },
         new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead: { code: 1150, category: DiagnosticCategory.Error, key: "new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead_1150", message: "'new T[]' cannot be used to create an array. Use 'new Array<T>()' instead." },
-        const_declarations_must_be_initialized: { code: 1155, category: DiagnosticCategory.Error, key: "const_declarations_must_be_initialized_1155", message: "'const' declarations must be initialized" },
+        const_declarations_must_be_initialized: { code: 1155, category: DiagnosticCategory.Error, key: "const_declarations_must_be_initialized_1155", message: "'const' declarations must be initialized." },
         const_declarations_can_only_be_declared_inside_a_block: { code: 1156, category: DiagnosticCategory.Error, key: "const_declarations_can_only_be_declared_inside_a_block_1156", message: "'const' declarations can only be declared inside a block." },
         let_declarations_can_only_be_declared_inside_a_block: { code: 1157, category: DiagnosticCategory.Error, key: "let_declarations_can_only_be_declared_inside_a_block_1157", message: "'let' declarations can only be declared inside a block." },
         Unterminated_template_literal: { code: 1160, category: DiagnosticCategory.Error, key: "Unterminated_template_literal_1160", message: "Unterminated template literal." },
@@ -154,7 +155,6 @@ namespace ts {
         Module_0_has_no_default_export: { code: 1192, category: DiagnosticCategory.Error, key: "Module_0_has_no_default_export_1192", message: "Module '{0}' has no default export." },
         An_export_declaration_cannot_have_modifiers: { code: 1193, category: DiagnosticCategory.Error, key: "An_export_declaration_cannot_have_modifiers_1193", message: "An export declaration cannot have modifiers." },
         Export_declarations_are_not_permitted_in_a_namespace: { code: 1194, category: DiagnosticCategory.Error, key: "Export_declarations_are_not_permitted_in_a_namespace_1194", message: "Export declarations are not permitted in a namespace." },
-        Catch_clause_variable_name_must_be_an_identifier: { code: 1195, category: DiagnosticCategory.Error, key: "Catch_clause_variable_name_must_be_an_identifier_1195", message: "Catch clause variable name must be an identifier." },
         Catch_clause_variable_cannot_have_a_type_annotation: { code: 1196, category: DiagnosticCategory.Error, key: "Catch_clause_variable_cannot_have_a_type_annotation_1196", message: "Catch clause variable cannot have a type annotation." },
         Catch_clause_variable_cannot_have_an_initializer: { code: 1197, category: DiagnosticCategory.Error, key: "Catch_clause_variable_cannot_have_an_initializer_1197", message: "Catch clause variable cannot have an initializer." },
         An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive: { code: 1198, category: DiagnosticCategory.Error, key: "An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive_1198", message: "An extended Unicode escape value must be between 0x0 and 0x10FFFF inclusive." },
@@ -162,16 +162,18 @@ namespace ts {
         Line_terminator_not_permitted_before_arrow: { code: 1200, category: DiagnosticCategory.Error, key: "Line_terminator_not_permitted_before_arrow_1200", message: "Line terminator not permitted before arrow." },
         Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead: { code: 1202, category: DiagnosticCategory.Error, key: "Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asteri_1202", message: "Import assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'import * as ns from \"mod\"', 'import {a} from \"mod\"', 'import d from \"mod\"', or another module format instead." },
         Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_or_another_module_format_instead: { code: 1203, category: DiagnosticCategory.Error, key: "Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_defaul_1203", message: "Export assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'export default' or another module format instead." },
+        Cannot_re_export_a_type_when_the_isolatedModules_flag_is_provided: { code: 1205, category: DiagnosticCategory.Error, key: "Cannot_re_export_a_type_when_the_isolatedModules_flag_is_provided_1205", message: "Cannot re-export a type when the '--isolatedModules' flag is provided." },
         Decorators_are_not_valid_here: { code: 1206, category: DiagnosticCategory.Error, key: "Decorators_are_not_valid_here_1206", message: "Decorators are not valid here." },
         Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name: { code: 1207, category: DiagnosticCategory.Error, key: "Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name_1207", message: "Decorators cannot be applied to multiple get/set accessors of the same name." },
         Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided: { code: 1208, category: DiagnosticCategory.Error, key: "Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided_1208", message: "Cannot compile namespaces when the '--isolatedModules' flag is provided." },
         Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided: { code: 1209, category: DiagnosticCategory.Error, key: "Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided_1209", message: "Ambient const enums are not allowed when the '--isolatedModules' flag is provided." },
         Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode: { code: 1210, category: DiagnosticCategory.Error, key: "Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode_1210", message: "Invalid use of '{0}'. Class definitions are automatically in strict mode." },
-        A_class_declaration_without_the_default_modifier_must_have_a_name: { code: 1211, category: DiagnosticCategory.Error, key: "A_class_declaration_without_the_default_modifier_must_have_a_name_1211", message: "A class declaration without the 'default' modifier must have a name" },
-        Identifier_expected_0_is_a_reserved_word_in_strict_mode: { code: 1212, category: DiagnosticCategory.Error, key: "Identifier_expected_0_is_a_reserved_word_in_strict_mode_1212", message: "Identifier expected. '{0}' is a reserved word in strict mode" },
+        A_class_declaration_without_the_default_modifier_must_have_a_name: { code: 1211, category: DiagnosticCategory.Error, key: "A_class_declaration_without_the_default_modifier_must_have_a_name_1211", message: "A class declaration without the 'default' modifier must have a name." },
+        Identifier_expected_0_is_a_reserved_word_in_strict_mode: { code: 1212, category: DiagnosticCategory.Error, key: "Identifier_expected_0_is_a_reserved_word_in_strict_mode_1212", message: "Identifier expected. '{0}' is a reserved word in strict mode." },
         Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_strict_mode: { code: 1213, category: DiagnosticCategory.Error, key: "Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_stric_1213", message: "Identifier expected. '{0}' is a reserved word in strict mode. Class definitions are automatically in strict mode." },
         Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode: { code: 1214, category: DiagnosticCategory.Error, key: "Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode_1214", message: "Identifier expected. '{0}' is a reserved word in strict mode. Modules are automatically in strict mode." },
         Invalid_use_of_0_Modules_are_automatically_in_strict_mode: { code: 1215, category: DiagnosticCategory.Error, key: "Invalid_use_of_0_Modules_are_automatically_in_strict_mode_1215", message: "Invalid use of '{0}'. Modules are automatically in strict mode." },
+        Identifier_expected_esModule_is_reserved_as_an_exported_marker_when_transforming_ECMAScript_modules: { code: 1216, category: DiagnosticCategory.Error, key: "Identifier_expected_esModule_is_reserved_as_an_exported_marker_when_transforming_ECMAScript_modules_1216", message: "Identifier expected. '__esModule' is reserved as an exported marker when transforming ECMAScript modules." },
         Export_assignment_is_not_supported_when_module_flag_is_system: { code: 1218, category: DiagnosticCategory.Error, key: "Export_assignment_is_not_supported_when_module_flag_is_system_1218", message: "Export assignment is not supported when '--module' flag is 'system'." },
         Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning: { code: 1219, category: DiagnosticCategory.Error, key: "Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_t_1219", message: "Experimental support for decorators is a feature that is subject to change in a future release. Set the 'experimentalDecorators' option to remove this warning." },
         Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher: { code: 1220, category: DiagnosticCategory.Error, key: "Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher_1220", message: "Generators are only available when targeting ECMAScript 2015 or higher." },
@@ -217,6 +219,17 @@ namespace ts {
         Global_module_exports_may_only_appear_in_declaration_files: { code: 1315, category: DiagnosticCategory.Error, key: "Global_module_exports_may_only_appear_in_declaration_files_1315", message: "Global module exports may only appear in declaration files." },
         Global_module_exports_may_only_appear_at_top_level: { code: 1316, category: DiagnosticCategory.Error, key: "Global_module_exports_may_only_appear_at_top_level_1316", message: "Global module exports may only appear at top level." },
         A_parameter_property_cannot_be_declared_using_a_rest_parameter: { code: 1317, category: DiagnosticCategory.Error, key: "A_parameter_property_cannot_be_declared_using_a_rest_parameter_1317", message: "A parameter property cannot be declared using a rest parameter." },
+        An_abstract_accessor_cannot_have_an_implementation: { code: 1318, category: DiagnosticCategory.Error, key: "An_abstract_accessor_cannot_have_an_implementation_1318", message: "An abstract accessor cannot have an implementation." },
+        A_default_export_can_only_be_used_in_an_ECMAScript_style_module: { code: 1319, category: DiagnosticCategory.Error, key: "A_default_export_can_only_be_used_in_an_ECMAScript_style_module_1319", message: "A default export can only be used in an ECMAScript-style module." },
+        Type_of_await_operand_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member: { code: 1320, category: DiagnosticCategory.Error, key: "Type_of_await_operand_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member_1320", message: "Type of 'await' operand must either be a valid promise or must not contain a callable 'then' member." },
+        Type_of_yield_operand_in_an_async_generator_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member: { code: 1321, category: DiagnosticCategory.Error, key: "Type_of_yield_operand_in_an_async_generator_must_either_be_a_valid_promise_or_must_not_contain_a_cal_1321", message: "Type of 'yield' operand in an async generator must either be a valid promise or must not contain a callable 'then' member." },
+        Type_of_iterated_elements_of_a_yield_Asterisk_operand_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member: { code: 1322, category: DiagnosticCategory.Error, key: "Type_of_iterated_elements_of_a_yield_Asterisk_operand_must_either_be_a_valid_promise_or_must_not_con_1322", message: "Type of iterated elements of a 'yield*' operand must either be a valid promise or must not contain a callable 'then' member." },
+        Dynamic_import_cannot_be_used_when_targeting_ECMAScript_2015_modules: { code: 1323, category: DiagnosticCategory.Error, key: "Dynamic_import_cannot_be_used_when_targeting_ECMAScript_2015_modules_1323", message: "Dynamic import cannot be used when targeting ECMAScript 2015 modules." },
+        Dynamic_import_must_have_one_specifier_as_an_argument: { code: 1324, category: DiagnosticCategory.Error, key: "Dynamic_import_must_have_one_specifier_as_an_argument_1324", message: "Dynamic import must have one specifier as an argument." },
+        Specifier_of_dynamic_import_cannot_be_spread_element: { code: 1325, category: DiagnosticCategory.Error, key: "Specifier_of_dynamic_import_cannot_be_spread_element_1325", message: "Specifier of dynamic import cannot be spread element." },
+        Dynamic_import_cannot_have_type_arguments: { code: 1326, category: DiagnosticCategory.Error, key: "Dynamic_import_cannot_have_type_arguments_1326", message: "Dynamic import cannot have type arguments" },
+        String_literal_with_double_quotes_expected: { code: 1327, category: DiagnosticCategory.Error, key: "String_literal_with_double_quotes_expected_1327", message: "String literal with double quotes expected." },
+        Property_value_can_only_be_string_literal_numeric_literal_true_false_null_object_literal_or_array_literal: { code: 1328, category: DiagnosticCategory.Error, key: "Property_value_can_only_be_string_literal_numeric_literal_true_false_null_object_literal_or_array_li_1328", message: "Property value can only be string literal, numeric literal, 'true', 'false', 'null', object literal or array literal." },
         Duplicate_identifier_0: { code: 2300, category: DiagnosticCategory.Error, key: "Duplicate_identifier_0_2300", message: "Duplicate identifier '{0}'." },
         Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor: { code: 2301, category: DiagnosticCategory.Error, key: "Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor_2301", message: "Initializer of instance member variable '{0}' cannot reference identifier '{1}' declared in the constructor." },
         Static_members_cannot_reference_class_type_parameters: { code: 2302, category: DiagnosticCategory.Error, key: "Static_members_cannot_reference_class_type_parameters_2302", message: "Static members cannot reference class type parameters." },
@@ -260,9 +273,10 @@ namespace ts {
         Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword: { code: 2340, category: DiagnosticCategory.Error, key: "Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword_2340", message: "Only public and protected methods of the base class are accessible via the 'super' keyword." },
         Property_0_is_private_and_only_accessible_within_class_1: { code: 2341, category: DiagnosticCategory.Error, key: "Property_0_is_private_and_only_accessible_within_class_1_2341", message: "Property '{0}' is private and only accessible within class '{1}'." },
         An_index_expression_argument_must_be_of_type_string_number_symbol_or_any: { code: 2342, category: DiagnosticCategory.Error, key: "An_index_expression_argument_must_be_of_type_string_number_symbol_or_any_2342", message: "An index expression argument must be of type 'string', 'number', 'symbol', or 'any'." },
+        This_syntax_requires_an_imported_helper_named_1_but_module_0_has_no_exported_member_1: { code: 2343, category: DiagnosticCategory.Error, key: "This_syntax_requires_an_imported_helper_named_1_but_module_0_has_no_exported_member_1_2343", message: "This syntax requires an imported helper named '{1}', but module '{0}' has no exported member '{1}'." },
         Type_0_does_not_satisfy_the_constraint_1: { code: 2344, category: DiagnosticCategory.Error, key: "Type_0_does_not_satisfy_the_constraint_1_2344", message: "Type '{0}' does not satisfy the constraint '{1}'." },
         Argument_of_type_0_is_not_assignable_to_parameter_of_type_1: { code: 2345, category: DiagnosticCategory.Error, key: "Argument_of_type_0_is_not_assignable_to_parameter_of_type_1_2345", message: "Argument of type '{0}' is not assignable to parameter of type '{1}'." },
-        Supplied_parameters_do_not_match_any_signature_of_call_target: { code: 2346, category: DiagnosticCategory.Error, key: "Supplied_parameters_do_not_match_any_signature_of_call_target_2346", message: "Supplied parameters do not match any signature of call target." },
+        Call_target_does_not_contain_any_signatures: { code: 2346, category: DiagnosticCategory.Error, key: "Call_target_does_not_contain_any_signatures_2346", message: "Call target does not contain any signatures." },
         Untyped_function_calls_may_not_accept_type_arguments: { code: 2347, category: DiagnosticCategory.Error, key: "Untyped_function_calls_may_not_accept_type_arguments_2347", message: "Untyped function calls may not accept type arguments." },
         Value_of_type_0_is_not_callable_Did_you_mean_to_include_new: { code: 2348, category: DiagnosticCategory.Error, key: "Value_of_type_0_is_not_callable_Did_you_mean_to_include_new_2348", message: "Value of type '{0}' is not callable. Did you mean to include 'new'?" },
         Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures: { code: 2349, category: DiagnosticCategory.Error, key: "Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatur_2349", message: "Cannot invoke an expression whose type lacks a call signature. Type '{0}' has no compatible call signatures." },
@@ -270,19 +284,20 @@ namespace ts {
         Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature: { code: 2351, category: DiagnosticCategory.Error, key: "Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature_2351", message: "Cannot use 'new' with an expression whose type lacks a call or construct signature." },
         Type_0_cannot_be_converted_to_type_1: { code: 2352, category: DiagnosticCategory.Error, key: "Type_0_cannot_be_converted_to_type_1_2352", message: "Type '{0}' cannot be converted to type '{1}'." },
         Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1: { code: 2353, category: DiagnosticCategory.Error, key: "Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1_2353", message: "Object literal may only specify known properties, and '{0}' does not exist in type '{1}'." },
+        This_syntax_requires_an_imported_helper_but_module_0_cannot_be_found: { code: 2354, category: DiagnosticCategory.Error, key: "This_syntax_requires_an_imported_helper_but_module_0_cannot_be_found_2354", message: "This syntax requires an imported helper but module '{0}' cannot be found." },
         A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value: { code: 2355, category: DiagnosticCategory.Error, key: "A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value_2355", message: "A function whose declared type is neither 'void' nor 'any' must return a value." },
         An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type: { code: 2356, category: DiagnosticCategory.Error, key: "An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type_2356", message: "An arithmetic operand must be of type 'any', 'number' or an enum type." },
-        The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer: { code: 2357, category: DiagnosticCategory.Error, key: "The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer_2357", message: "The operand of an increment or decrement operator must be a variable, property or indexer." },
+        The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_or_a_property_access: { code: 2357, category: DiagnosticCategory.Error, key: "The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_or_a_property_access_2357", message: "The operand of an increment or decrement operator must be a variable or a property access." },
         The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_parameter: { code: 2358, category: DiagnosticCategory.Error, key: "The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_paramete_2358", message: "The left-hand side of an 'instanceof' expression must be of type 'any', an object type or a type parameter." },
         The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_Function_interface_type: { code: 2359, category: DiagnosticCategory.Error, key: "The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_F_2359", message: "The right-hand side of an 'instanceof' expression must be of type 'any' or of a type assignable to the 'Function' interface type." },
         The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol: { code: 2360, category: DiagnosticCategory.Error, key: "The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol_2360", message: "The left-hand side of an 'in' expression must be of type 'any', 'string', 'number', or 'symbol'." },
-        The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter: { code: 2361, category: DiagnosticCategory.Error, key: "The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter_2361", message: "The right-hand side of an 'in' expression must be of type 'any', an object type or a type parameter" },
+        The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter: { code: 2361, category: DiagnosticCategory.Error, key: "The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter_2361", message: "The right-hand side of an 'in' expression must be of type 'any', an object type or a type parameter." },
         The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type: { code: 2362, category: DiagnosticCategory.Error, key: "The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type_2362", message: "The left-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type." },
         The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type: { code: 2363, category: DiagnosticCategory.Error, key: "The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type_2363", message: "The right-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type." },
-        Invalid_left_hand_side_of_assignment_expression: { code: 2364, category: DiagnosticCategory.Error, key: "Invalid_left_hand_side_of_assignment_expression_2364", message: "Invalid left-hand side of assignment expression." },
+        The_left_hand_side_of_an_assignment_expression_must_be_a_variable_or_a_property_access: { code: 2364, category: DiagnosticCategory.Error, key: "The_left_hand_side_of_an_assignment_expression_must_be_a_variable_or_a_property_access_2364", message: "The left-hand side of an assignment expression must be a variable or a property access." },
         Operator_0_cannot_be_applied_to_types_1_and_2: { code: 2365, category: DiagnosticCategory.Error, key: "Operator_0_cannot_be_applied_to_types_1_and_2_2365", message: "Operator '{0}' cannot be applied to types '{1}' and '{2}'." },
         Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined: { code: 2366, category: DiagnosticCategory.Error, key: "Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined_2366", message: "Function lacks ending return statement and return type does not include 'undefined'." },
-        Type_parameter_name_cannot_be_0: { code: 2368, category: DiagnosticCategory.Error, key: "Type_parameter_name_cannot_be_0_2368", message: "Type parameter name cannot be '{0}'" },
+        Type_parameter_name_cannot_be_0: { code: 2368, category: DiagnosticCategory.Error, key: "Type_parameter_name_cannot_be_0_2368", message: "Type parameter name cannot be '{0}'." },
         A_parameter_property_is_only_allowed_in_a_constructor_implementation: { code: 2369, category: DiagnosticCategory.Error, key: "A_parameter_property_is_only_allowed_in_a_constructor_implementation_2369", message: "A parameter property is only allowed in a constructor implementation." },
         A_rest_parameter_must_be_of_an_array_type: { code: 2370, category: DiagnosticCategory.Error, key: "A_rest_parameter_must_be_of_an_array_type_2370", message: "A rest parameter must be of an array type." },
         A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation: { code: 2371, category: DiagnosticCategory.Error, key: "A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation_2371", message: "A parameter initializer is only allowed in a function or constructor implementation." },
@@ -319,15 +334,15 @@ namespace ts {
         Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_type_2: { code: 2403, category: DiagnosticCategory.Error, key: "Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_t_2403", message: "Subsequent variable declarations must have the same type.  Variable '{0}' must be of type '{1}', but here has type '{2}'." },
         The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation: { code: 2404, category: DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation_2404", message: "The left-hand side of a 'for...in' statement cannot use a type annotation." },
         The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any: { code: 2405, category: DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any_2405", message: "The left-hand side of a 'for...in' statement must be of type 'string' or 'any'." },
-        Invalid_left_hand_side_in_for_in_statement: { code: 2406, category: DiagnosticCategory.Error, key: "Invalid_left_hand_side_in_for_in_statement_2406", message: "Invalid left-hand side in 'for...in' statement." },
+        The_left_hand_side_of_a_for_in_statement_must_be_a_variable_or_a_property_access: { code: 2406, category: DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_must_be_a_variable_or_a_property_access_2406", message: "The left-hand side of a 'for...in' statement must be a variable or a property access." },
         The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter: { code: 2407, category: DiagnosticCategory.Error, key: "The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter_2407", message: "The right-hand side of a 'for...in' statement must be of type 'any', an object type or a type parameter." },
         Setters_cannot_return_a_value: { code: 2408, category: DiagnosticCategory.Error, key: "Setters_cannot_return_a_value_2408", message: "Setters cannot return a value." },
-        Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class: { code: 2409, category: DiagnosticCategory.Error, key: "Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class_2409", message: "Return type of constructor signature must be assignable to the instance type of the class" },
+        Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class: { code: 2409, category: DiagnosticCategory.Error, key: "Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class_2409", message: "Return type of constructor signature must be assignable to the instance type of the class." },
         The_with_statement_is_not_supported_All_symbols_in_a_with_block_will_have_type_any: { code: 2410, category: DiagnosticCategory.Error, key: "The_with_statement_is_not_supported_All_symbols_in_a_with_block_will_have_type_any_2410", message: "The 'with' statement is not supported. All symbols in a 'with' block will have type 'any'." },
         Property_0_of_type_1_is_not_assignable_to_string_index_type_2: { code: 2411, category: DiagnosticCategory.Error, key: "Property_0_of_type_1_is_not_assignable_to_string_index_type_2_2411", message: "Property '{0}' of type '{1}' is not assignable to string index type '{2}'." },
         Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2: { code: 2412, category: DiagnosticCategory.Error, key: "Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2_2412", message: "Property '{0}' of type '{1}' is not assignable to numeric index type '{2}'." },
         Numeric_index_type_0_is_not_assignable_to_string_index_type_1: { code: 2413, category: DiagnosticCategory.Error, key: "Numeric_index_type_0_is_not_assignable_to_string_index_type_1_2413", message: "Numeric index type '{0}' is not assignable to string index type '{1}'." },
-        Class_name_cannot_be_0: { code: 2414, category: DiagnosticCategory.Error, key: "Class_name_cannot_be_0_2414", message: "Class name cannot be '{0}'" },
+        Class_name_cannot_be_0: { code: 2414, category: DiagnosticCategory.Error, key: "Class_name_cannot_be_0_2414", message: "Class name cannot be '{0}'." },
         Class_0_incorrectly_extends_base_class_1: { code: 2415, category: DiagnosticCategory.Error, key: "Class_0_incorrectly_extends_base_class_1_2415", message: "Class '{0}' incorrectly extends base class '{1}'." },
         Class_static_side_0_incorrectly_extends_base_class_static_side_1: { code: 2417, category: DiagnosticCategory.Error, key: "Class_static_side_0_incorrectly_extends_base_class_static_side_1_2417", message: "Class static side '{0}' incorrectly extends base class static side '{1}'." },
         Class_0_incorrectly_implements_interface_1: { code: 2420, category: DiagnosticCategory.Error, key: "Class_0_incorrectly_implements_interface_1_2420", message: "Class '{0}' incorrectly implements interface '{1}'." },
@@ -336,19 +351,19 @@ namespace ts {
         Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_property: { code: 2424, category: DiagnosticCategory.Error, key: "Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_proper_2424", message: "Class '{0}' defines instance member function '{1}', but extended class '{2}' defines it as instance member property." },
         Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_function: { code: 2425, category: DiagnosticCategory.Error, key: "Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_functi_2425", message: "Class '{0}' defines instance member property '{1}', but extended class '{2}' defines it as instance member function." },
         Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_function: { code: 2426, category: DiagnosticCategory.Error, key: "Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_functi_2426", message: "Class '{0}' defines instance member accessor '{1}', but extended class '{2}' defines it as instance member function." },
-        Interface_name_cannot_be_0: { code: 2427, category: DiagnosticCategory.Error, key: "Interface_name_cannot_be_0_2427", message: "Interface name cannot be '{0}'" },
+        Interface_name_cannot_be_0: { code: 2427, category: DiagnosticCategory.Error, key: "Interface_name_cannot_be_0_2427", message: "Interface name cannot be '{0}'." },
         All_declarations_of_0_must_have_identical_type_parameters: { code: 2428, category: DiagnosticCategory.Error, key: "All_declarations_of_0_must_have_identical_type_parameters_2428", message: "All declarations of '{0}' must have identical type parameters." },
         Interface_0_incorrectly_extends_interface_1: { code: 2430, category: DiagnosticCategory.Error, key: "Interface_0_incorrectly_extends_interface_1_2430", message: "Interface '{0}' incorrectly extends interface '{1}'." },
-        Enum_name_cannot_be_0: { code: 2431, category: DiagnosticCategory.Error, key: "Enum_name_cannot_be_0_2431", message: "Enum name cannot be '{0}'" },
+        Enum_name_cannot_be_0: { code: 2431, category: DiagnosticCategory.Error, key: "Enum_name_cannot_be_0_2431", message: "Enum name cannot be '{0}'." },
         In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enum_element: { code: 2432, category: DiagnosticCategory.Error, key: "In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enu_2432", message: "In an enum with multiple declarations, only one declaration can omit an initializer for its first enum element." },
-        A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merged: { code: 2433, category: DiagnosticCategory.Error, key: "A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merg_2433", message: "A namespace declaration cannot be in a different file from a class or function with which it is merged" },
-        A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged: { code: 2434, category: DiagnosticCategory.Error, key: "A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged_2434", message: "A namespace declaration cannot be located prior to a class or function with which it is merged" },
+        A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merged: { code: 2433, category: DiagnosticCategory.Error, key: "A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merg_2433", message: "A namespace declaration cannot be in a different file from a class or function with which it is merged." },
+        A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged: { code: 2434, category: DiagnosticCategory.Error, key: "A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged_2434", message: "A namespace declaration cannot be located prior to a class or function with which it is merged." },
         Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces: { code: 2435, category: DiagnosticCategory.Error, key: "Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces_2435", message: "Ambient modules cannot be nested in other modules or namespaces." },
         Ambient_module_declaration_cannot_specify_relative_module_name: { code: 2436, category: DiagnosticCategory.Error, key: "Ambient_module_declaration_cannot_specify_relative_module_name_2436", message: "Ambient module declaration cannot specify relative module name." },
-        Module_0_is_hidden_by_a_local_declaration_with_the_same_name: { code: 2437, category: DiagnosticCategory.Error, key: "Module_0_is_hidden_by_a_local_declaration_with_the_same_name_2437", message: "Module '{0}' is hidden by a local declaration with the same name" },
-        Import_name_cannot_be_0: { code: 2438, category: DiagnosticCategory.Error, key: "Import_name_cannot_be_0_2438", message: "Import name cannot be '{0}'" },
+        Module_0_is_hidden_by_a_local_declaration_with_the_same_name: { code: 2437, category: DiagnosticCategory.Error, key: "Module_0_is_hidden_by_a_local_declaration_with_the_same_name_2437", message: "Module '{0}' is hidden by a local declaration with the same name." },
+        Import_name_cannot_be_0: { code: 2438, category: DiagnosticCategory.Error, key: "Import_name_cannot_be_0_2438", message: "Import name cannot be '{0}'." },
         Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relative_module_name: { code: 2439, category: DiagnosticCategory.Error, key: "Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relati_2439", message: "Import or export declaration in an ambient module declaration cannot reference module through relative module name." },
-        Import_declaration_conflicts_with_local_declaration_of_0: { code: 2440, category: DiagnosticCategory.Error, key: "Import_declaration_conflicts_with_local_declaration_of_0_2440", message: "Import declaration conflicts with local declaration of '{0}'" },
+        Import_declaration_conflicts_with_local_declaration_of_0: { code: 2440, category: DiagnosticCategory.Error, key: "Import_declaration_conflicts_with_local_declaration_of_0_2440", message: "Import declaration conflicts with local declaration of '{0}'." },
         Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module: { code: 2441, category: DiagnosticCategory.Error, key: "Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_2441", message: "Duplicate identifier '{0}'. Compiler reserves name '{1}' in top level scope of a module." },
         Types_have_separate_declarations_of_a_private_property_0: { code: 2442, category: DiagnosticCategory.Error, key: "Types_have_separate_declarations_of_a_private_property_0_2442", message: "Types have separate declarations of a private property '{0}'." },
         Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2: { code: 2443, category: DiagnosticCategory.Error, key: "Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2_2443", message: "Property '{0}' is protected but type '{1}' is not a class derived from '{2}'." },
@@ -357,20 +372,20 @@ namespace ts {
         Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1: { code: 2446, category: DiagnosticCategory.Error, key: "Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1_2446", message: "Property '{0}' is protected and only accessible through an instance of class '{1}'." },
         The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead: { code: 2447, category: DiagnosticCategory.Error, key: "The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead_2447", message: "The '{0}' operator is not allowed for boolean types. Consider using '{1}' instead." },
         Block_scoped_variable_0_used_before_its_declaration: { code: 2448, category: DiagnosticCategory.Error, key: "Block_scoped_variable_0_used_before_its_declaration_2448", message: "Block-scoped variable '{0}' used before its declaration." },
-        The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property: { code: 2449, category: DiagnosticCategory.Error, key: "The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property_2449", message: "The operand of an increment or decrement operator cannot be a constant or a read-only property." },
-        Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property: { code: 2450, category: DiagnosticCategory.Error, key: "Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property_2450", message: "Left-hand side of assignment expression cannot be a constant or a read-only property." },
+        Class_0_used_before_its_declaration: { code: 2449, category: DiagnosticCategory.Error, key: "Class_0_used_before_its_declaration_2449", message: "Class '{0}' used before its declaration." },
+        Enum_0_used_before_its_declaration: { code: 2450, category: DiagnosticCategory.Error, key: "Enum_0_used_before_its_declaration_2450", message: "Enum '{0}' used before its declaration." },
         Cannot_redeclare_block_scoped_variable_0: { code: 2451, category: DiagnosticCategory.Error, key: "Cannot_redeclare_block_scoped_variable_0_2451", message: "Cannot redeclare block-scoped variable '{0}'." },
         An_enum_member_cannot_have_a_numeric_name: { code: 2452, category: DiagnosticCategory.Error, key: "An_enum_member_cannot_have_a_numeric_name_2452", message: "An enum member cannot have a numeric name." },
         The_type_argument_for_type_parameter_0_cannot_be_inferred_from_the_usage_Consider_specifying_the_type_arguments_explicitly: { code: 2453, category: DiagnosticCategory.Error, key: "The_type_argument_for_type_parameter_0_cannot_be_inferred_from_the_usage_Consider_specifying_the_typ_2453", message: "The type argument for type parameter '{0}' cannot be inferred from the usage. Consider specifying the type arguments explicitly." },
         Variable_0_is_used_before_being_assigned: { code: 2454, category: DiagnosticCategory.Error, key: "Variable_0_is_used_before_being_assigned_2454", message: "Variable '{0}' is used before being assigned." },
         Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0: { code: 2455, category: DiagnosticCategory.Error, key: "Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0_2455", message: "Type argument candidate '{1}' is not a valid type argument because it is not a supertype of candidate '{0}'." },
         Type_alias_0_circularly_references_itself: { code: 2456, category: DiagnosticCategory.Error, key: "Type_alias_0_circularly_references_itself_2456", message: "Type alias '{0}' circularly references itself." },
-        Type_alias_name_cannot_be_0: { code: 2457, category: DiagnosticCategory.Error, key: "Type_alias_name_cannot_be_0_2457", message: "Type alias name cannot be '{0}'" },
+        Type_alias_name_cannot_be_0: { code: 2457, category: DiagnosticCategory.Error, key: "Type_alias_name_cannot_be_0_2457", message: "Type alias name cannot be '{0}'." },
         An_AMD_module_cannot_have_multiple_name_assignments: { code: 2458, category: DiagnosticCategory.Error, key: "An_AMD_module_cannot_have_multiple_name_assignments_2458", message: "An AMD module cannot have multiple name assignments." },
         Type_0_has_no_property_1_and_no_string_index_signature: { code: 2459, category: DiagnosticCategory.Error, key: "Type_0_has_no_property_1_and_no_string_index_signature_2459", message: "Type '{0}' has no property '{1}' and no string index signature." },
         Type_0_has_no_property_1: { code: 2460, category: DiagnosticCategory.Error, key: "Type_0_has_no_property_1_2460", message: "Type '{0}' has no property '{1}'." },
         Type_0_is_not_an_array_type: { code: 2461, category: DiagnosticCategory.Error, key: "Type_0_is_not_an_array_type_2461", message: "Type '{0}' is not an array type." },
-        A_rest_element_must_be_last_in_an_array_destructuring_pattern: { code: 2462, category: DiagnosticCategory.Error, key: "A_rest_element_must_be_last_in_an_array_destructuring_pattern_2462", message: "A rest element must be last in an array destructuring pattern" },
+        A_rest_element_must_be_last_in_a_destructuring_pattern: { code: 2462, category: DiagnosticCategory.Error, key: "A_rest_element_must_be_last_in_a_destructuring_pattern_2462", message: "A rest element must be last in a destructuring pattern." },
         A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature: { code: 2463, category: DiagnosticCategory.Error, key: "A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature_2463", message: "A binding pattern parameter cannot be optional in an implementation signature." },
         A_computed_property_name_must_be_of_type_string_number_symbol_or_any: { code: 2464, category: DiagnosticCategory.Error, key: "A_computed_property_name_must_be_of_type_string_number_symbol_or_any_2464", message: "A computed property name must be of type 'string', 'number', 'symbol', or 'any'." },
         this_cannot_be_referenced_in_a_computed_property_name: { code: 2465, category: DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_a_computed_property_name_2465", message: "'this' cannot be referenced in a computed property name." },
@@ -391,15 +406,13 @@ namespace ts {
         let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations: { code: 2480, category: DiagnosticCategory.Error, key: "let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations_2480", message: "'let' is not allowed to be used as a name in 'let' or 'const' declarations." },
         Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1: { code: 2481, category: DiagnosticCategory.Error, key: "Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1_2481", message: "Cannot initialize outer scoped variable '{0}' in the same scope as block scoped declaration '{1}'." },
         The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation: { code: 2483, category: DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation_2483", message: "The left-hand side of a 'for...of' statement cannot use a type annotation." },
-        Export_declaration_conflicts_with_exported_declaration_of_0: { code: 2484, category: DiagnosticCategory.Error, key: "Export_declaration_conflicts_with_exported_declaration_of_0_2484", message: "Export declaration conflicts with exported declaration of '{0}'" },
-        The_left_hand_side_of_a_for_of_statement_cannot_be_a_constant_or_a_read_only_property: { code: 2485, category: DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_of_statement_cannot_be_a_constant_or_a_read_only_property_2485", message: "The left-hand side of a 'for...of' statement cannot be a constant or a read-only property." },
-        The_left_hand_side_of_a_for_in_statement_cannot_be_a_constant_or_a_read_only_property: { code: 2486, category: DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_cannot_be_a_constant_or_a_read_only_property_2486", message: "The left-hand side of a 'for...in' statement cannot be a constant or a read-only property." },
-        Invalid_left_hand_side_in_for_of_statement: { code: 2487, category: DiagnosticCategory.Error, key: "Invalid_left_hand_side_in_for_of_statement_2487", message: "Invalid left-hand side in 'for...of' statement." },
+        Export_declaration_conflicts_with_exported_declaration_of_0: { code: 2484, category: DiagnosticCategory.Error, key: "Export_declaration_conflicts_with_exported_declaration_of_0_2484", message: "Export declaration conflicts with exported declaration of '{0}'." },
+        The_left_hand_side_of_a_for_of_statement_must_be_a_variable_or_a_property_access: { code: 2487, category: DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_of_statement_must_be_a_variable_or_a_property_access_2487", message: "The left-hand side of a 'for...of' statement must be a variable or a property access." },
         Type_must_have_a_Symbol_iterator_method_that_returns_an_iterator: { code: 2488, category: DiagnosticCategory.Error, key: "Type_must_have_a_Symbol_iterator_method_that_returns_an_iterator_2488", message: "Type must have a '[Symbol.iterator]()' method that returns an iterator." },
         An_iterator_must_have_a_next_method: { code: 2489, category: DiagnosticCategory.Error, key: "An_iterator_must_have_a_next_method_2489", message: "An iterator must have a 'next()' method." },
         The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property: { code: 2490, category: DiagnosticCategory.Error, key: "The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property_2490", message: "The type returned by the 'next()' method of an iterator must have a 'value' property." },
         The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern: { code: 2491, category: DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern_2491", message: "The left-hand side of a 'for...in' statement cannot be a destructuring pattern." },
-        Cannot_redeclare_identifier_0_in_catch_clause: { code: 2492, category: DiagnosticCategory.Error, key: "Cannot_redeclare_identifier_0_in_catch_clause_2492", message: "Cannot redeclare identifier '{0}' in catch clause" },
+        Cannot_redeclare_identifier_0_in_catch_clause: { code: 2492, category: DiagnosticCategory.Error, key: "Cannot_redeclare_identifier_0_in_catch_clause_2492", message: "Cannot redeclare identifier '{0}' in catch clause." },
         Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2: { code: 2493, category: DiagnosticCategory.Error, key: "Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2_2493", message: "Tuple type '{0}' with length '{1}' cannot be assigned to tuple with length '{2}'." },
         Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher: { code: 2494, category: DiagnosticCategory.Error, key: "Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher_2494", message: "Using a string in a 'for...of' statement is only supported in ECMAScript 5 and higher." },
         Type_0_is_not_an_array_type_or_a_string_type: { code: 2495, category: DiagnosticCategory.Error, key: "Type_0_is_not_an_array_type_or_a_string_type_2495", message: "Type '{0}' is not an array type or a string type." },
@@ -411,6 +424,7 @@ namespace ts {
         A_rest_element_cannot_contain_a_binding_pattern: { code: 2501, category: DiagnosticCategory.Error, key: "A_rest_element_cannot_contain_a_binding_pattern_2501", message: "A rest element cannot contain a binding pattern." },
         _0_is_referenced_directly_or_indirectly_in_its_own_type_annotation: { code: 2502, category: DiagnosticCategory.Error, key: "_0_is_referenced_directly_or_indirectly_in_its_own_type_annotation_2502", message: "'{0}' is referenced directly or indirectly in its own type annotation." },
         Cannot_find_namespace_0: { code: 2503, category: DiagnosticCategory.Error, key: "Cannot_find_namespace_0_2503", message: "Cannot find namespace '{0}'." },
+        Type_must_have_a_Symbol_asyncIterator_method_that_returns_an_async_iterator: { code: 2504, category: DiagnosticCategory.Error, key: "Type_must_have_a_Symbol_asyncIterator_method_that_returns_an_async_iterator_2504", message: "Type must have a '[Symbol.asyncIterator]()' method that returns an async iterator." },
         A_generator_cannot_have_a_void_type_annotation: { code: 2505, category: DiagnosticCategory.Error, key: "A_generator_cannot_have_a_void_type_annotation_2505", message: "A generator cannot have a 'void' type annotation." },
         _0_is_referenced_directly_or_indirectly_in_its_own_base_expression: { code: 2506, category: DiagnosticCategory.Error, key: "_0_is_referenced_directly_or_indirectly_in_its_own_base_expression_2506", message: "'{0}' is referenced directly or indirectly in its own base expression." },
         Type_0_is_not_a_constructor_function_type: { code: 2507, category: DiagnosticCategory.Error, key: "Type_0_is_not_a_constructor_function_type_2507", message: "Type '{0}' is not a constructor function type." },
@@ -425,6 +439,7 @@ namespace ts {
         All_declarations_of_an_abstract_method_must_be_consecutive: { code: 2516, category: DiagnosticCategory.Error, key: "All_declarations_of_an_abstract_method_must_be_consecutive_2516", message: "All declarations of an abstract method must be consecutive." },
         Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type: { code: 2517, category: DiagnosticCategory.Error, key: "Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type_2517", message: "Cannot assign an abstract constructor type to a non-abstract constructor type." },
         A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard: { code: 2518, category: DiagnosticCategory.Error, key: "A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard_2518", message: "A 'this'-based type guard is not compatible with a parameter-based type guard." },
+        An_async_iterator_must_have_a_next_method: { code: 2519, category: DiagnosticCategory.Error, key: "An_async_iterator_must_have_a_next_method_2519", message: "An async iterator must have a 'next()' method." },
         Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions: { code: 2520, category: DiagnosticCategory.Error, key: "Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions_2520", message: "Duplicate identifier '{0}'. Compiler uses declaration '{1}' to support async functions." },
         Expression_resolves_to_variable_declaration_0_that_compiler_uses_to_support_async_functions: { code: 2521, category: DiagnosticCategory.Error, key: "Expression_resolves_to_variable_declaration_0_that_compiler_uses_to_support_async_functions_2521", message: "Expression resolves to variable declaration '{0}' that compiler uses to support async functions." },
         The_arguments_object_cannot_be_referenced_in_an_async_function_or_method_in_ES3_and_ES5_Consider_using_a_standard_function_or_method: { code: 2522, category: DiagnosticCategory.Error, key: "The_arguments_object_cannot_be_referenced_in_an_async_function_or_method_in_ES3_and_ES5_Consider_usi_2522", message: "The 'arguments' object cannot be referenced in an async function or method in ES3 and ES5. Consider using a standard function or method." },
@@ -441,29 +456,55 @@ namespace ts {
         Object_is_possibly_null_or_undefined: { code: 2533, category: DiagnosticCategory.Error, key: "Object_is_possibly_null_or_undefined_2533", message: "Object is possibly 'null' or 'undefined'." },
         A_function_returning_never_cannot_have_a_reachable_end_point: { code: 2534, category: DiagnosticCategory.Error, key: "A_function_returning_never_cannot_have_a_reachable_end_point_2534", message: "A function returning 'never' cannot have a reachable end point." },
         Enum_type_0_has_members_with_initializers_that_are_not_literals: { code: 2535, category: DiagnosticCategory.Error, key: "Enum_type_0_has_members_with_initializers_that_are_not_literals_2535", message: "Enum type '{0}' has members with initializers that are not literals." },
+        Type_0_cannot_be_used_to_index_type_1: { code: 2536, category: DiagnosticCategory.Error, key: "Type_0_cannot_be_used_to_index_type_1_2536", message: "Type '{0}' cannot be used to index type '{1}'." },
+        Type_0_has_no_matching_index_signature_for_type_1: { code: 2537, category: DiagnosticCategory.Error, key: "Type_0_has_no_matching_index_signature_for_type_1_2537", message: "Type '{0}' has no matching index signature for type '{1}'." },
+        Type_0_cannot_be_used_as_an_index_type: { code: 2538, category: DiagnosticCategory.Error, key: "Type_0_cannot_be_used_as_an_index_type_2538", message: "Type '{0}' cannot be used as an index type." },
+        Cannot_assign_to_0_because_it_is_not_a_variable: { code: 2539, category: DiagnosticCategory.Error, key: "Cannot_assign_to_0_because_it_is_not_a_variable_2539", message: "Cannot assign to '{0}' because it is not a variable." },
+        Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property: { code: 2540, category: DiagnosticCategory.Error, key: "Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property_2540", message: "Cannot assign to '{0}' because it is a constant or a read-only property." },
+        The_target_of_an_assignment_must_be_a_variable_or_a_property_access: { code: 2541, category: DiagnosticCategory.Error, key: "The_target_of_an_assignment_must_be_a_variable_or_a_property_access_2541", message: "The target of an assignment must be a variable or a property access." },
+        Index_signature_in_type_0_only_permits_reading: { code: 2542, category: DiagnosticCategory.Error, key: "Index_signature_in_type_0_only_permits_reading_2542", message: "Index signature in type '{0}' only permits reading." },
+        Duplicate_identifier_newTarget_Compiler_uses_variable_declaration_newTarget_to_capture_new_target_meta_property_reference: { code: 2543, category: DiagnosticCategory.Error, key: "Duplicate_identifier_newTarget_Compiler_uses_variable_declaration_newTarget_to_capture_new_target_me_2543", message: "Duplicate identifier '_newTarget'. Compiler uses variable declaration '_newTarget' to capture 'new.target' meta-property reference." },
+        Expression_resolves_to_variable_declaration_newTarget_that_compiler_uses_to_capture_new_target_meta_property_reference: { code: 2544, category: DiagnosticCategory.Error, key: "Expression_resolves_to_variable_declaration_newTarget_that_compiler_uses_to_capture_new_target_meta__2544", message: "Expression resolves to variable declaration '_newTarget' that compiler uses to capture 'new.target' meta-property reference." },
+        A_mixin_class_must_have_a_constructor_with_a_single_rest_parameter_of_type_any: { code: 2545, category: DiagnosticCategory.Error, key: "A_mixin_class_must_have_a_constructor_with_a_single_rest_parameter_of_type_any_2545", message: "A mixin class must have a constructor with a single rest parameter of type 'any[]'." },
+        Property_0_has_conflicting_declarations_and_is_inaccessible_in_type_1: { code: 2546, category: DiagnosticCategory.Error, key: "Property_0_has_conflicting_declarations_and_is_inaccessible_in_type_1_2546", message: "Property '{0}' has conflicting declarations and is inaccessible in type '{1}'." },
+        The_type_returned_by_the_next_method_of_an_async_iterator_must_be_a_promise_for_a_type_with_a_value_property: { code: 2547, category: DiagnosticCategory.Error, key: "The_type_returned_by_the_next_method_of_an_async_iterator_must_be_a_promise_for_a_type_with_a_value__2547", message: "The type returned by the 'next()' method of an async iterator must be a promise for a type with a 'value' property." },
+        Type_0_is_not_an_array_type_or_does_not_have_a_Symbol_iterator_method_that_returns_an_iterator: { code: 2548, category: DiagnosticCategory.Error, key: "Type_0_is_not_an_array_type_or_does_not_have_a_Symbol_iterator_method_that_returns_an_iterator_2548", message: "Type '{0}' is not an array type or does not have a '[Symbol.iterator]()' method that returns an iterator." },
+        Type_0_is_not_an_array_type_or_a_string_type_or_does_not_have_a_Symbol_iterator_method_that_returns_an_iterator: { code: 2549, category: DiagnosticCategory.Error, key: "Type_0_is_not_an_array_type_or_a_string_type_or_does_not_have_a_Symbol_iterator_method_that_returns__2549", message: "Type '{0}' is not an array type or a string type or does not have a '[Symbol.iterator]()' method that returns an iterator." },
+        Generic_type_instantiation_is_excessively_deep_and_possibly_infinite: { code: 2550, category: DiagnosticCategory.Error, key: "Generic_type_instantiation_is_excessively_deep_and_possibly_infinite_2550", message: "Generic type instantiation is excessively deep and possibly infinite." },
+        Property_0_does_not_exist_on_type_1_Did_you_mean_2: { code: 2551, category: DiagnosticCategory.Error, key: "Property_0_does_not_exist_on_type_1_Did_you_mean_2_2551", message: "Property '{0}' does not exist on type '{1}'. Did you mean '{2}'?" },
+        Cannot_find_name_0_Did_you_mean_1: { code: 2552, category: DiagnosticCategory.Error, key: "Cannot_find_name_0_Did_you_mean_1_2552", message: "Cannot find name '{0}'. Did you mean '{1}'?" },
+        Computed_values_are_not_permitted_in_an_enum_with_string_valued_members: { code: 2553, category: DiagnosticCategory.Error, key: "Computed_values_are_not_permitted_in_an_enum_with_string_valued_members_2553", message: "Computed values are not permitted in an enum with string valued members." },
+        Expected_0_arguments_but_got_1: { code: 2554, category: DiagnosticCategory.Error, key: "Expected_0_arguments_but_got_1_2554", message: "Expected {0} arguments, but got {1}." },
+        Expected_at_least_0_arguments_but_got_1: { code: 2555, category: DiagnosticCategory.Error, key: "Expected_at_least_0_arguments_but_got_1_2555", message: "Expected at least {0} arguments, but got {1}." },
+        Expected_0_arguments_but_got_a_minimum_of_1: { code: 2556, category: DiagnosticCategory.Error, key: "Expected_0_arguments_but_got_a_minimum_of_1_2556", message: "Expected {0} arguments, but got a minimum of {1}." },
+        Expected_at_least_0_arguments_but_got_a_minimum_of_1: { code: 2557, category: DiagnosticCategory.Error, key: "Expected_at_least_0_arguments_but_got_a_minimum_of_1_2557", message: "Expected at least {0} arguments, but got a minimum of {1}." },
+        Expected_0_type_arguments_but_got_1: { code: 2558, category: DiagnosticCategory.Error, key: "Expected_0_type_arguments_but_got_1_2558", message: "Expected {0} type arguments, but got {1}." },
+        Type_0_has_no_properties_in_common_with_type_1: { code: 2559, category: DiagnosticCategory.Error, key: "Type_0_has_no_properties_in_common_with_type_1_2559", message: "Type '{0}' has no properties in common with type '{1}'." },
         JSX_element_attributes_type_0_may_not_be_a_union_type: { code: 2600, category: DiagnosticCategory.Error, key: "JSX_element_attributes_type_0_may_not_be_a_union_type_2600", message: "JSX element attributes type '{0}' may not be a union type." },
         The_return_type_of_a_JSX_element_constructor_must_return_an_object_type: { code: 2601, category: DiagnosticCategory.Error, key: "The_return_type_of_a_JSX_element_constructor_must_return_an_object_type_2601", message: "The return type of a JSX element constructor must return an object type." },
         JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist: { code: 2602, category: DiagnosticCategory.Error, key: "JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist_2602", message: "JSX element implicitly has type 'any' because the global type 'JSX.Element' does not exist." },
-        Property_0_in_type_1_is_not_assignable_to_type_2: { code: 2603, category: DiagnosticCategory.Error, key: "Property_0_in_type_1_is_not_assignable_to_type_2_2603", message: "Property '{0}' in type '{1}' is not assignable to type '{2}'" },
+        Property_0_in_type_1_is_not_assignable_to_type_2: { code: 2603, category: DiagnosticCategory.Error, key: "Property_0_in_type_1_is_not_assignable_to_type_2_2603", message: "Property '{0}' in type '{1}' is not assignable to type '{2}'." },
         JSX_element_type_0_does_not_have_any_construct_or_call_signatures: { code: 2604, category: DiagnosticCategory.Error, key: "JSX_element_type_0_does_not_have_any_construct_or_call_signatures_2604", message: "JSX element type '{0}' does not have any construct or call signatures." },
         JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements: { code: 2605, category: DiagnosticCategory.Error, key: "JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements_2605", message: "JSX element type '{0}' is not a constructor function for JSX elements." },
         Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property: { code: 2606, category: DiagnosticCategory.Error, key: "Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property_2606", message: "Property '{0}' of JSX spread attribute is not assignable to target property." },
-        JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property: { code: 2607, category: DiagnosticCategory.Error, key: "JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property_2607", message: "JSX element class does not support attributes because it does not have a '{0}' property" },
-        The_global_type_JSX_0_may_not_have_more_than_one_property: { code: 2608, category: DiagnosticCategory.Error, key: "The_global_type_JSX_0_may_not_have_more_than_one_property_2608", message: "The global type 'JSX.{0}' may not have more than one property" },
-        Cannot_emit_namespaced_JSX_elements_in_React: { code: 2650, category: DiagnosticCategory.Error, key: "Cannot_emit_namespaced_JSX_elements_in_React_2650", message: "Cannot emit namespaced JSX elements in React" },
+        JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property: { code: 2607, category: DiagnosticCategory.Error, key: "JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property_2607", message: "JSX element class does not support attributes because it does not have a '{0}' property." },
+        The_global_type_JSX_0_may_not_have_more_than_one_property: { code: 2608, category: DiagnosticCategory.Error, key: "The_global_type_JSX_0_may_not_have_more_than_one_property_2608", message: "The global type 'JSX.{0}' may not have more than one property." },
+        JSX_spread_child_must_be_an_array_type: { code: 2609, category: DiagnosticCategory.Error, key: "JSX_spread_child_must_be_an_array_type_2609", message: "JSX spread child must be an array type." },
+        Cannot_augment_module_0_with_value_exports_because_it_resolves_to_a_non_module_entity: { code: 2649, category: DiagnosticCategory.Error, key: "Cannot_augment_module_0_with_value_exports_because_it_resolves_to_a_non_module_entity_2649", message: "Cannot augment module '{0}' with value exports because it resolves to a non-module entity." },
         A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums: { code: 2651, category: DiagnosticCategory.Error, key: "A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_memb_2651", message: "A member initializer in a enum declaration cannot reference members declared after it, including members defined in other enums." },
         Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead: { code: 2652, category: DiagnosticCategory.Error, key: "Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_d_2652", message: "Merged declaration '{0}' cannot include a default export declaration. Consider adding a separate 'export default {0}' declaration instead." },
         Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1: { code: 2653, category: DiagnosticCategory.Error, key: "Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1_2653", message: "Non-abstract class expression does not implement inherited abstract member '{0}' from class '{1}'." },
         Exported_external_package_typings_file_cannot_contain_tripleslash_references_Please_contact_the_package_author_to_update_the_package_definition: { code: 2654, category: DiagnosticCategory.Error, key: "Exported_external_package_typings_file_cannot_contain_tripleslash_references_Please_contact_the_pack_2654", message: "Exported external package typings file cannot contain tripleslash references. Please contact the package author to update the package definition." },
         Exported_external_package_typings_file_0_is_not_a_module_Please_contact_the_package_author_to_update_the_package_definition: { code: 2656, category: DiagnosticCategory.Error, key: "Exported_external_package_typings_file_0_is_not_a_module_Please_contact_the_package_author_to_update_2656", message: "Exported external package typings file '{0}' is not a module. Please contact the package author to update the package definition." },
-        JSX_expressions_must_have_one_parent_element: { code: 2657, category: DiagnosticCategory.Error, key: "JSX_expressions_must_have_one_parent_element_2657", message: "JSX expressions must have one parent element" },
-        Type_0_provides_no_match_for_the_signature_1: { code: 2658, category: DiagnosticCategory.Error, key: "Type_0_provides_no_match_for_the_signature_1_2658", message: "Type '{0}' provides no match for the signature '{1}'" },
+        JSX_expressions_must_have_one_parent_element: { code: 2657, category: DiagnosticCategory.Error, key: "JSX_expressions_must_have_one_parent_element_2657", message: "JSX expressions must have one parent element." },
+        Type_0_provides_no_match_for_the_signature_1: { code: 2658, category: DiagnosticCategory.Error, key: "Type_0_provides_no_match_for_the_signature_1_2658", message: "Type '{0}' provides no match for the signature '{1}'." },
         super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_higher: { code: 2659, category: DiagnosticCategory.Error, key: "super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_highe_2659", message: "'super' is only allowed in members of object literal expressions when option 'target' is 'ES2015' or higher." },
         super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions: { code: 2660, category: DiagnosticCategory.Error, key: "super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions_2660", message: "'super' can only be referenced in members of derived classes or object literal expressions." },
         Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module: { code: 2661, category: DiagnosticCategory.Error, key: "Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module_2661", message: "Cannot export '{0}'. Only local declarations can be exported from a module." },
         Cannot_find_name_0_Did_you_mean_the_static_member_1_0: { code: 2662, category: DiagnosticCategory.Error, key: "Cannot_find_name_0_Did_you_mean_the_static_member_1_0_2662", message: "Cannot find name '{0}'. Did you mean the static member '{1}.{0}'?" },
         Cannot_find_name_0_Did_you_mean_the_instance_member_this_0: { code: 2663, category: DiagnosticCategory.Error, key: "Cannot_find_name_0_Did_you_mean_the_instance_member_this_0_2663", message: "Cannot find name '{0}'. Did you mean the instance member 'this.{0}'?" },
         Invalid_module_name_in_augmentation_module_0_cannot_be_found: { code: 2664, category: DiagnosticCategory.Error, key: "Invalid_module_name_in_augmentation_module_0_cannot_be_found_2664", message: "Invalid module name in augmentation, module '{0}' cannot be found." },
+        Invalid_module_name_in_augmentation_Module_0_resolves_to_an_untyped_module_at_1_which_cannot_be_augmented: { code: 2665, category: DiagnosticCategory.Error, key: "Invalid_module_name_in_augmentation_Module_0_resolves_to_an_untyped_module_at_1_which_cannot_be_augm_2665", message: "Invalid module name in augmentation. Module '{0}' resolves to an untyped module at '{1}', which cannot be augmented." },
         Exports_and_export_assignments_are_not_permitted_in_module_augmentations: { code: 2666, category: DiagnosticCategory.Error, key: "Exports_and_export_assignments_are_not_permitted_in_module_augmentations_2666", message: "Exports and export assignments are not permitted in module augmentations." },
         Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_module: { code: 2667, category: DiagnosticCategory.Error, key: "Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_mod_2667", message: "Imports are not permitted in module augmentations. Consider moving them to the enclosing external module." },
         export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always_visible: { code: 2668, category: DiagnosticCategory.Error, key: "export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always__2668", message: "'export' modifier cannot be applied to ambient modules and module augmentations since they are always visible." },
@@ -484,17 +525,32 @@ namespace ts {
         this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation: { code: 2683, category: DiagnosticCategory.Error, key: "this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_2683", message: "'this' implicitly has type 'any' because it does not have a type annotation." },
         The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1: { code: 2684, category: DiagnosticCategory.Error, key: "The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1_2684", message: "The 'this' context of type '{0}' is not assignable to method's 'this' of type '{1}'." },
         The_this_types_of_each_signature_are_incompatible: { code: 2685, category: DiagnosticCategory.Error, key: "The_this_types_of_each_signature_are_incompatible_2685", message: "The 'this' types of each signature are incompatible." },
-        Identifier_0_must_be_imported_from_a_module: { code: 2686, category: DiagnosticCategory.Error, key: "Identifier_0_must_be_imported_from_a_module_2686", message: "Identifier '{0}' must be imported from a module" },
+        _0_refers_to_a_UMD_global_but_the_current_file_is_a_module_Consider_adding_an_import_instead: { code: 2686, category: DiagnosticCategory.Error, key: "_0_refers_to_a_UMD_global_but_the_current_file_is_a_module_Consider_adding_an_import_instead_2686", message: "'{0}' refers to a UMD global, but the current file is a module. Consider adding an import instead." },
         All_declarations_of_0_must_have_identical_modifiers: { code: 2687, category: DiagnosticCategory.Error, key: "All_declarations_of_0_must_have_identical_modifiers_2687", message: "All declarations of '{0}' must have identical modifiers." },
         Cannot_find_type_definition_file_for_0: { code: 2688, category: DiagnosticCategory.Error, key: "Cannot_find_type_definition_file_for_0_2688", message: "Cannot find type definition file for '{0}'." },
         Cannot_extend_an_interface_0_Did_you_mean_implements: { code: 2689, category: DiagnosticCategory.Error, key: "Cannot_extend_an_interface_0_Did_you_mean_implements_2689", message: "Cannot extend an interface '{0}'. Did you mean 'implements'?" },
-        A_class_must_be_declared_after_its_base_class: { code: 2690, category: DiagnosticCategory.Error, key: "A_class_must_be_declared_after_its_base_class_2690", message: "A class must be declared after its base class." },
         An_import_path_cannot_end_with_a_0_extension_Consider_importing_1_instead: { code: 2691, category: DiagnosticCategory.Error, key: "An_import_path_cannot_end_with_a_0_extension_Consider_importing_1_instead_2691", message: "An import path cannot end with a '{0}' extension. Consider importing '{1}' instead." },
         _0_is_a_primitive_but_1_is_a_wrapper_object_Prefer_using_0_when_possible: { code: 2692, category: DiagnosticCategory.Error, key: "_0_is_a_primitive_but_1_is_a_wrapper_object_Prefer_using_0_when_possible_2692", message: "'{0}' is a primitive, but '{1}' is a wrapper object. Prefer using '{0}' when possible." },
         _0_only_refers_to_a_type_but_is_being_used_as_a_value_here: { code: 2693, category: DiagnosticCategory.Error, key: "_0_only_refers_to_a_type_but_is_being_used_as_a_value_here_2693", message: "'{0}' only refers to a type, but is being used as a value here." },
         Namespace_0_has_no_exported_member_1: { code: 2694, category: DiagnosticCategory.Error, key: "Namespace_0_has_no_exported_member_1_2694", message: "Namespace '{0}' has no exported member '{1}'." },
         Left_side_of_comma_operator_is_unused_and_has_no_side_effects: { code: 2695, category: DiagnosticCategory.Error, key: "Left_side_of_comma_operator_is_unused_and_has_no_side_effects_2695", message: "Left side of comma operator is unused and has no side effects." },
         The_Object_type_is_assignable_to_very_few_other_types_Did_you_mean_to_use_the_any_type_instead: { code: 2696, category: DiagnosticCategory.Error, key: "The_Object_type_is_assignable_to_very_few_other_types_Did_you_mean_to_use_the_any_type_instead_2696", message: "The 'Object' type is assignable to very few other types. Did you mean to use the 'any' type instead?" },
+        An_async_function_or_method_must_return_a_Promise_Make_sure_you_have_a_declaration_for_Promise_or_include_ES2015_in_your_lib_option: { code: 2697, category: DiagnosticCategory.Error, key: "An_async_function_or_method_must_return_a_Promise_Make_sure_you_have_a_declaration_for_Promise_or_in_2697", message: "An async function or method must return a 'Promise'. Make sure you have a declaration for 'Promise' or include 'ES2015' in your `--lib` option." },
+        Spread_types_may_only_be_created_from_object_types: { code: 2698, category: DiagnosticCategory.Error, key: "Spread_types_may_only_be_created_from_object_types_2698", message: "Spread types may only be created from object types." },
+        Static_property_0_conflicts_with_built_in_property_Function_0_of_constructor_function_1: { code: 2699, category: DiagnosticCategory.Error, key: "Static_property_0_conflicts_with_built_in_property_Function_0_of_constructor_function_1_2699", message: "Static property '{0}' conflicts with built-in property 'Function.{0}' of constructor function '{1}'." },
+        Rest_types_may_only_be_created_from_object_types: { code: 2700, category: DiagnosticCategory.Error, key: "Rest_types_may_only_be_created_from_object_types_2700", message: "Rest types may only be created from object types." },
+        The_target_of_an_object_rest_assignment_must_be_a_variable_or_a_property_access: { code: 2701, category: DiagnosticCategory.Error, key: "The_target_of_an_object_rest_assignment_must_be_a_variable_or_a_property_access_2701", message: "The target of an object rest assignment must be a variable or a property access." },
+        _0_only_refers_to_a_type_but_is_being_used_as_a_namespace_here: { code: 2702, category: DiagnosticCategory.Error, key: "_0_only_refers_to_a_type_but_is_being_used_as_a_namespace_here_2702", message: "'{0}' only refers to a type, but is being used as a namespace here." },
+        The_operand_of_a_delete_operator_must_be_a_property_reference: { code: 2703, category: DiagnosticCategory.Error, key: "The_operand_of_a_delete_operator_must_be_a_property_reference_2703", message: "The operand of a delete operator must be a property reference." },
+        The_operand_of_a_delete_operator_cannot_be_a_read_only_property: { code: 2704, category: DiagnosticCategory.Error, key: "The_operand_of_a_delete_operator_cannot_be_a_read_only_property_2704", message: "The operand of a delete operator cannot be a read-only property." },
+        An_async_function_or_method_in_ES5_SlashES3_requires_the_Promise_constructor_Make_sure_you_have_a_declaration_for_the_Promise_constructor_or_include_ES2015_in_your_lib_option: { code: 2705, category: DiagnosticCategory.Error, key: "An_async_function_or_method_in_ES5_SlashES3_requires_the_Promise_constructor_Make_sure_you_have_a_de_2705", message: "An async function or method in ES5/ES3 requires the 'Promise' constructor.  Make sure you have a declaration for the 'Promise' constructor or include 'ES2015' in your `--lib` option." },
+        Required_type_parameters_may_not_follow_optional_type_parameters: { code: 2706, category: DiagnosticCategory.Error, key: "Required_type_parameters_may_not_follow_optional_type_parameters_2706", message: "Required type parameters may not follow optional type parameters." },
+        Generic_type_0_requires_between_1_and_2_type_arguments: { code: 2707, category: DiagnosticCategory.Error, key: "Generic_type_0_requires_between_1_and_2_type_arguments_2707", message: "Generic type '{0}' requires between {1} and {2} type arguments." },
+        Cannot_use_namespace_0_as_a_value: { code: 2708, category: DiagnosticCategory.Error, key: "Cannot_use_namespace_0_as_a_value_2708", message: "Cannot use namespace '{0}' as a value." },
+        Cannot_use_namespace_0_as_a_type: { code: 2709, category: DiagnosticCategory.Error, key: "Cannot_use_namespace_0_as_a_type_2709", message: "Cannot use namespace '{0}' as a type." },
+        _0_are_specified_twice_The_attribute_named_0_will_be_overwritten: { code: 2710, category: DiagnosticCategory.Error, key: "_0_are_specified_twice_The_attribute_named_0_will_be_overwritten_2710", message: "'{0}' are specified twice. The attribute named '{0}' will be overwritten." },
+        A_dynamic_import_call_returns_a_Promise_Make_sure_you_have_a_declaration_for_Promise_or_include_ES2015_in_your_lib_option: { code: 2711, category: DiagnosticCategory.Error, key: "A_dynamic_import_call_returns_a_Promise_Make_sure_you_have_a_declaration_for_Promise_or_include_ES20_2711", message: "A dynamic import call returns a 'Promise'. Make sure you have a declaration for 'Promise' or include 'ES2015' in your `--lib` option." },
+        A_dynamic_import_call_in_ES5_SlashES3_requires_the_Promise_constructor_Make_sure_you_have_a_declaration_for_the_Promise_constructor_or_include_ES2015_in_your_lib_option: { code: 2712, category: DiagnosticCategory.Error, key: "A_dynamic_import_call_in_ES5_SlashES3_requires_the_Promise_constructor_Make_sure_you_have_a_declarat_2712", message: "A dynamic import call in ES5/ES3 requires the 'Promise' constructor.  Make sure you have a declaration for the 'Promise' constructor or include 'ES2015' in your `--lib` option." },
         Import_declaration_0_is_using_private_name_1: { code: 4000, category: DiagnosticCategory.Error, key: "Import_declaration_0_is_using_private_name_1_4000", message: "Import declaration '{0}' is using private name '{1}'." },
         Type_parameter_0_of_exported_class_has_or_is_using_private_name_1: { code: 4002, category: DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_class_has_or_is_using_private_name_1_4002", message: "Type parameter '{0}' of exported class has or is using private name '{1}'." },
         Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1: { code: 4004, category: DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1_4004", message: "Type parameter '{0}' of exported interface has or is using private name '{1}'." },
@@ -505,8 +561,8 @@ namespace ts {
         Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1: { code: 4014, category: DiagnosticCategory.Error, key: "Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1_4014", message: "Type parameter '{0}' of method from exported interface has or is using private name '{1}'." },
         Type_parameter_0_of_exported_function_has_or_is_using_private_name_1: { code: 4016, category: DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_function_has_or_is_using_private_name_1_4016", message: "Type parameter '{0}' of exported function has or is using private name '{1}'." },
         Implements_clause_of_exported_class_0_has_or_is_using_private_name_1: { code: 4019, category: DiagnosticCategory.Error, key: "Implements_clause_of_exported_class_0_has_or_is_using_private_name_1_4019", message: "Implements clause of exported class '{0}' has or is using private name '{1}'." },
-        Extends_clause_of_exported_class_0_has_or_is_using_private_name_1: { code: 4020, category: DiagnosticCategory.Error, key: "Extends_clause_of_exported_class_0_has_or_is_using_private_name_1_4020", message: "Extends clause of exported class '{0}' has or is using private name '{1}'." },
-        Extends_clause_of_exported_interface_0_has_or_is_using_private_name_1: { code: 4022, category: DiagnosticCategory.Error, key: "Extends_clause_of_exported_interface_0_has_or_is_using_private_name_1_4022", message: "Extends clause of exported interface '{0}' has or is using private name '{1}'." },
+        extends_clause_of_exported_class_0_has_or_is_using_private_name_1: { code: 4020, category: DiagnosticCategory.Error, key: "extends_clause_of_exported_class_0_has_or_is_using_private_name_1_4020", message: "'extends' clause of exported class '{0}' has or is using private name '{1}'." },
+        extends_clause_of_exported_interface_0_has_or_is_using_private_name_1: { code: 4022, category: DiagnosticCategory.Error, key: "extends_clause_of_exported_interface_0_has_or_is_using_private_name_1_4022", message: "'extends' clause of exported interface '{0}' has or is using private name '{1}'." },
         Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4023, category: DiagnosticCategory.Error, key: "Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named_4023", message: "Exported variable '{0}' has or is using name '{1}' from external module {2} but cannot be named." },
         Exported_variable_0_has_or_is_using_name_1_from_private_module_2: { code: 4024, category: DiagnosticCategory.Error, key: "Exported_variable_0_has_or_is_using_name_1_from_private_module_2_4024", message: "Exported variable '{0}' has or is using name '{1}' from private module '{2}'." },
         Exported_variable_0_has_or_is_using_private_name_1: { code: 4025, category: DiagnosticCategory.Error, key: "Exported_variable_0_has_or_is_using_private_name_1_4025", message: "Exported variable '{0}' has or is using private name '{1}'." },
@@ -565,17 +621,20 @@ namespace ts {
         Parameter_0_of_exported_function_has_or_is_using_private_name_1: { code: 4078, category: DiagnosticCategory.Error, key: "Parameter_0_of_exported_function_has_or_is_using_private_name_1_4078", message: "Parameter '{0}' of exported function has or is using private name '{1}'." },
         Exported_type_alias_0_has_or_is_using_private_name_1: { code: 4081, category: DiagnosticCategory.Error, key: "Exported_type_alias_0_has_or_is_using_private_name_1_4081", message: "Exported type alias '{0}' has or is using private name '{1}'." },
         Default_export_of_the_module_has_or_is_using_private_name_0: { code: 4082, category: DiagnosticCategory.Error, key: "Default_export_of_the_module_has_or_is_using_private_name_0_4082", message: "Default export of the module has or is using private name '{0}'." },
+        Type_parameter_0_of_exported_type_alias_has_or_is_using_private_name_1: { code: 4083, category: DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_type_alias_has_or_is_using_private_name_1_4083", message: "Type parameter '{0}' of exported type alias has or is using private name '{1}'." },
         Conflicting_definitions_for_0_found_at_1_and_2_Consider_installing_a_specific_version_of_this_library_to_resolve_the_conflict: { code: 4090, category: DiagnosticCategory.Message, key: "Conflicting_definitions_for_0_found_at_1_and_2_Consider_installing_a_specific_version_of_this_librar_4090", message: "Conflicting definitions for '{0}' found at '{1}' and '{2}'. Consider installing a specific version of this library to resolve the conflict." },
+        Parameter_0_of_index_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2: { code: 4091, category: DiagnosticCategory.Error, key: "Parameter_0_of_index_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2_4091", message: "Parameter '{0}' of index signature from exported interface has or is using name '{1}' from private module '{2}'." },
+        Parameter_0_of_index_signature_from_exported_interface_has_or_is_using_private_name_1: { code: 4092, category: DiagnosticCategory.Error, key: "Parameter_0_of_index_signature_from_exported_interface_has_or_is_using_private_name_1_4092", message: "Parameter '{0}' of index signature from exported interface has or is using private name '{1}'." },
+        Property_0_of_exported_class_expression_may_not_be_private_or_protected: { code: 4094, category: DiagnosticCategory.Error, key: "Property_0_of_exported_class_expression_may_not_be_private_or_protected_4094", message: "Property '{0}' of exported class expression may not be private or protected." },
         The_current_host_does_not_support_the_0_option: { code: 5001, category: DiagnosticCategory.Error, key: "The_current_host_does_not_support_the_0_option_5001", message: "The current host does not support the '{0}' option." },
         Cannot_find_the_common_subdirectory_path_for_the_input_files: { code: 5009, category: DiagnosticCategory.Error, key: "Cannot_find_the_common_subdirectory_path_for_the_input_files_5009", message: "Cannot find the common subdirectory path for the input files." },
         File_specification_cannot_end_in_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0: { code: 5010, category: DiagnosticCategory.Error, key: "File_specification_cannot_end_in_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0_5010", message: "File specification cannot end in a recursive directory wildcard ('**'): '{0}'." },
         File_specification_cannot_contain_multiple_recursive_directory_wildcards_Asterisk_Asterisk_Colon_0: { code: 5011, category: DiagnosticCategory.Error, key: "File_specification_cannot_contain_multiple_recursive_directory_wildcards_Asterisk_Asterisk_Colon_0_5011", message: "File specification cannot contain multiple recursive directory wildcards ('**'): '{0}'." },
-        Cannot_read_file_0_Colon_1: { code: 5012, category: DiagnosticCategory.Error, key: "Cannot_read_file_0_Colon_1_5012", message: "Cannot read file '{0}': {1}" },
-        Unsupported_file_encoding: { code: 5013, category: DiagnosticCategory.Error, key: "Unsupported_file_encoding_5013", message: "Unsupported file encoding." },
+        Cannot_read_file_0_Colon_1: { code: 5012, category: DiagnosticCategory.Error, key: "Cannot_read_file_0_Colon_1_5012", message: "Cannot read file '{0}': {1}." },
         Failed_to_parse_file_0_Colon_1: { code: 5014, category: DiagnosticCategory.Error, key: "Failed_to_parse_file_0_Colon_1_5014", message: "Failed to parse file '{0}': {1}." },
         Unknown_compiler_option_0: { code: 5023, category: DiagnosticCategory.Error, key: "Unknown_compiler_option_0_5023", message: "Unknown compiler option '{0}'." },
         Compiler_option_0_requires_a_value_of_type_1: { code: 5024, category: DiagnosticCategory.Error, key: "Compiler_option_0_requires_a_value_of_type_1_5024", message: "Compiler option '{0}' requires a value of type {1}." },
-        Could_not_write_file_0_Colon_1: { code: 5033, category: DiagnosticCategory.Error, key: "Could_not_write_file_0_Colon_1_5033", message: "Could not write file '{0}': {1}" },
+        Could_not_write_file_0_Colon_1: { code: 5033, category: DiagnosticCategory.Error, key: "Could_not_write_file_0_Colon_1_5033", message: "Could not write file '{0}': {1}." },
         Option_project_cannot_be_mixed_with_source_files_on_a_command_line: { code: 5042, category: DiagnosticCategory.Error, key: "Option_project_cannot_be_mixed_with_source_files_on_a_command_line_5042", message: "Option 'project' cannot be mixed with source files on a command line." },
         Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES2015_or_higher: { code: 5047, category: DiagnosticCategory.Error, key: "Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES_5047", message: "Option 'isolatedModules' can only be used when either option '--module' is provided or option 'target' is 'ES2015' or higher." },
         Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided: { code: 5051, category: DiagnosticCategory.Error, key: "Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided_5051", message: "Option '{0} can only be used when either option '--inlineSourceMap' or option '--sourceMap' is provided." },
@@ -584,16 +643,17 @@ namespace ts {
         A_tsconfig_json_file_is_already_defined_at_Colon_0: { code: 5054, category: DiagnosticCategory.Error, key: "A_tsconfig_json_file_is_already_defined_at_Colon_0_5054", message: "A 'tsconfig.json' file is already defined at: '{0}'." },
         Cannot_write_file_0_because_it_would_overwrite_input_file: { code: 5055, category: DiagnosticCategory.Error, key: "Cannot_write_file_0_because_it_would_overwrite_input_file_5055", message: "Cannot write file '{0}' because it would overwrite input file." },
         Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files: { code: 5056, category: DiagnosticCategory.Error, key: "Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files_5056", message: "Cannot write file '{0}' because it would be overwritten by multiple input files." },
-        Cannot_find_a_tsconfig_json_file_at_the_specified_directory_Colon_0: { code: 5057, category: DiagnosticCategory.Error, key: "Cannot_find_a_tsconfig_json_file_at_the_specified_directory_Colon_0_5057", message: "Cannot find a tsconfig.json file at the specified directory: '{0}'" },
-        The_specified_path_does_not_exist_Colon_0: { code: 5058, category: DiagnosticCategory.Error, key: "The_specified_path_does_not_exist_Colon_0_5058", message: "The specified path does not exist: '{0}'" },
+        Cannot_find_a_tsconfig_json_file_at_the_specified_directory_Colon_0: { code: 5057, category: DiagnosticCategory.Error, key: "Cannot_find_a_tsconfig_json_file_at_the_specified_directory_Colon_0_5057", message: "Cannot find a tsconfig.json file at the specified directory: '{0}'." },
+        The_specified_path_does_not_exist_Colon_0: { code: 5058, category: DiagnosticCategory.Error, key: "The_specified_path_does_not_exist_Colon_0_5058", message: "The specified path does not exist: '{0}'." },
         Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier: { code: 5059, category: DiagnosticCategory.Error, key: "Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier_5059", message: "Invalid value for '--reactNamespace'. '{0}' is not a valid identifier." },
         Option_paths_cannot_be_used_without_specifying_baseUrl_option: { code: 5060, category: DiagnosticCategory.Error, key: "Option_paths_cannot_be_used_without_specifying_baseUrl_option_5060", message: "Option 'paths' cannot be used without specifying '--baseUrl' option." },
-        Pattern_0_can_have_at_most_one_Asterisk_character: { code: 5061, category: DiagnosticCategory.Error, key: "Pattern_0_can_have_at_most_one_Asterisk_character_5061", message: "Pattern '{0}' can have at most one '*' character" },
-        Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character: { code: 5062, category: DiagnosticCategory.Error, key: "Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character_5062", message: "Substitution '{0}' in pattern '{1}' in can have at most one '*' character" },
+        Pattern_0_can_have_at_most_one_Asterisk_character: { code: 5061, category: DiagnosticCategory.Error, key: "Pattern_0_can_have_at_most_one_Asterisk_character_5061", message: "Pattern '{0}' can have at most one '*' character." },
+        Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character: { code: 5062, category: DiagnosticCategory.Error, key: "Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character_5062", message: "Substitution '{0}' in pattern '{1}' in can have at most one '*' character." },
         Substitutions_for_pattern_0_should_be_an_array: { code: 5063, category: DiagnosticCategory.Error, key: "Substitutions_for_pattern_0_should_be_an_array_5063", message: "Substitutions for pattern '{0}' should be an array." },
         Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2: { code: 5064, category: DiagnosticCategory.Error, key: "Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2_5064", message: "Substitution '{0}' for pattern '{1}' has incorrect type, expected 'string', got '{2}'." },
         File_specification_cannot_contain_a_parent_directory_that_appears_after_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0: { code: 5065, category: DiagnosticCategory.Error, key: "File_specification_cannot_contain_a_parent_directory_that_appears_after_a_recursive_directory_wildca_5065", message: "File specification cannot contain a parent directory ('..') that appears after a recursive directory wildcard ('**'): '{0}'." },
         Substitutions_for_pattern_0_shouldn_t_be_an_empty_array: { code: 5066, category: DiagnosticCategory.Error, key: "Substitutions_for_pattern_0_shouldn_t_be_an_empty_array_5066", message: "Substitutions for pattern '{0}' shouldn't be an empty array." },
+        Invalid_value_for_jsxFactory_0_is_not_a_valid_identifier_or_qualified_name: { code: 5067, category: DiagnosticCategory.Error, key: "Invalid_value_for_jsxFactory_0_is_not_a_valid_identifier_or_qualified_name_5067", message: "Invalid value for 'jsxFactory'. '{0}' is not a valid identifier or qualified-name." },
         Concatenate_and_emit_output_to_single_file: { code: 6001, category: DiagnosticCategory.Message, key: "Concatenate_and_emit_output_to_single_file_6001", message: "Concatenate and emit output to single file." },
         Generates_corresponding_d_ts_file: { code: 6002, category: DiagnosticCategory.Message, key: "Generates_corresponding_d_ts_file_6002", message: "Generates corresponding '.d.ts' file." },
         Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations: { code: 6003, category: DiagnosticCategory.Message, key: "Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations_6003", message: "Specify the location where debugger should locate map files instead of generated locations." },
@@ -606,11 +666,11 @@ namespace ts {
         Do_not_emit_outputs: { code: 6010, category: DiagnosticCategory.Message, key: "Do_not_emit_outputs_6010", message: "Do not emit outputs." },
         Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typechecking: { code: 6011, category: DiagnosticCategory.Message, key: "Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typech_6011", message: "Allow default imports from modules with no default export. This does not affect code emit, just typechecking." },
         Skip_type_checking_of_declaration_files: { code: 6012, category: DiagnosticCategory.Message, key: "Skip_type_checking_of_declaration_files_6012", message: "Skip type checking of declaration files." },
-        Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015: { code: 6015, category: DiagnosticCategory.Message, key: "Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015_6015", message: "Specify ECMAScript target version: 'ES3' (default), 'ES5', or 'ES2015'" },
-        Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015: { code: 6016, category: DiagnosticCategory.Message, key: "Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015_6016", message: "Specify module code generation: 'commonjs', 'amd', 'system', 'umd' or 'es2015'" },
+        Specify_ECMAScript_target_version_Colon_ES3_default_ES5_ES2015_ES2016_ES2017_or_ESNEXT: { code: 6015, category: DiagnosticCategory.Message, key: "Specify_ECMAScript_target_version_Colon_ES3_default_ES5_ES2015_ES2016_ES2017_or_ESNEXT_6015", message: "Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', or 'ESNEXT'." },
+        Specify_module_code_generation_Colon_commonjs_amd_system_umd_es2015_or_ESNext: { code: 6016, category: DiagnosticCategory.Message, key: "Specify_module_code_generation_Colon_commonjs_amd_system_umd_es2015_or_ESNext_6016", message: "Specify module code generation: 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'." },
         Print_this_message: { code: 6017, category: DiagnosticCategory.Message, key: "Print_this_message_6017", message: "Print this message." },
         Print_the_compiler_s_version: { code: 6019, category: DiagnosticCategory.Message, key: "Print_the_compiler_s_version_6019", message: "Print the compiler's version." },
-        Compile_the_project_in_the_given_directory: { code: 6020, category: DiagnosticCategory.Message, key: "Compile_the_project_in_the_given_directory_6020", message: "Compile the project in the given directory." },
+        Compile_the_project_given_the_path_to_its_configuration_file_or_to_a_folder_with_a_tsconfig_json: { code: 6020, category: DiagnosticCategory.Message, key: "Compile_the_project_given_the_path_to_its_configuration_file_or_to_a_folder_with_a_tsconfig_json_6020", message: "Compile the project given the path to its configuration file, or to a folder with a 'tsconfig.json'." },
         Syntax_Colon_0: { code: 6023, category: DiagnosticCategory.Message, key: "Syntax_Colon_0_6023", message: "Syntax: {0}" },
         options: { code: 6024, category: DiagnosticCategory.Message, key: "options_6024", message: "options" },
         file: { code: 6025, category: DiagnosticCategory.Message, key: "file_6025", message: "file" },
@@ -625,11 +685,12 @@ namespace ts {
         LOCATION: { code: 6037, category: DiagnosticCategory.Message, key: "LOCATION_6037", message: "LOCATION" },
         DIRECTORY: { code: 6038, category: DiagnosticCategory.Message, key: "DIRECTORY_6038", message: "DIRECTORY" },
         STRATEGY: { code: 6039, category: DiagnosticCategory.Message, key: "STRATEGY_6039", message: "STRATEGY" },
+        FILE_OR_DIRECTORY: { code: 6040, category: DiagnosticCategory.Message, key: "FILE_OR_DIRECTORY_6040", message: "FILE OR DIRECTORY" },
         Compilation_complete_Watching_for_file_changes: { code: 6042, category: DiagnosticCategory.Message, key: "Compilation_complete_Watching_for_file_changes_6042", message: "Compilation complete. Watching for file changes." },
         Generates_corresponding_map_file: { code: 6043, category: DiagnosticCategory.Message, key: "Generates_corresponding_map_file_6043", message: "Generates corresponding '.map' file." },
         Compiler_option_0_expects_an_argument: { code: 6044, category: DiagnosticCategory.Error, key: "Compiler_option_0_expects_an_argument_6044", message: "Compiler option '{0}' expects an argument." },
         Unterminated_quoted_string_in_response_file_0: { code: 6045, category: DiagnosticCategory.Error, key: "Unterminated_quoted_string_in_response_file_0_6045", message: "Unterminated quoted string in response file '{0}'." },
-        Argument_for_0_option_must_be_Colon_1: { code: 6046, category: DiagnosticCategory.Error, key: "Argument_for_0_option_must_be_Colon_1_6046", message: "Argument for '{0}' option must be: {1}" },
+        Argument_for_0_option_must_be_Colon_1: { code: 6046, category: DiagnosticCategory.Error, key: "Argument_for_0_option_must_be_Colon_1_6046", message: "Argument for '{0}' option must be: {1}." },
         Locale_must_be_of_the_form_language_or_language_territory_For_example_0_or_1: { code: 6048, category: DiagnosticCategory.Error, key: "Locale_must_be_of_the_form_language_or_language_territory_For_example_0_or_1_6048", message: "Locale must be of the form <language> or <language>-<territory>. For example '{0}' or '{1}'." },
         Unsupported_locale_0: { code: 6049, category: DiagnosticCategory.Error, key: "Unsupported_locale_0_6049", message: "Unsupported locale '{0}'." },
         Unable_to_open_file_0: { code: 6050, category: DiagnosticCategory.Error, key: "Unable_to_open_file_0_6050", message: "Unable to open file '{0}'." },
@@ -651,17 +712,18 @@ namespace ts {
         Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file: { code: 6070, category: DiagnosticCategory.Message, key: "Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file_6070", message: "Initializes a TypeScript project and creates a tsconfig.json file." },
         Successfully_created_a_tsconfig_json_file: { code: 6071, category: DiagnosticCategory.Message, key: "Successfully_created_a_tsconfig_json_file_6071", message: "Successfully created a tsconfig.json file." },
         Suppress_excess_property_checks_for_object_literals: { code: 6072, category: DiagnosticCategory.Message, key: "Suppress_excess_property_checks_for_object_literals_6072", message: "Suppress excess property checks for object literals." },
-        Stylize_errors_and_messages_using_color_and_context_experimental: { code: 6073, category: DiagnosticCategory.Message, key: "Stylize_errors_and_messages_using_color_and_context_experimental_6073", message: "Stylize errors and messages using color and context. (experimental)" },
+        Stylize_errors_and_messages_using_color_and_context_experimental: { code: 6073, category: DiagnosticCategory.Message, key: "Stylize_errors_and_messages_using_color_and_context_experimental_6073", message: "Stylize errors and messages using color and context (experimental)." },
         Do_not_report_errors_on_unused_labels: { code: 6074, category: DiagnosticCategory.Message, key: "Do_not_report_errors_on_unused_labels_6074", message: "Do not report errors on unused labels." },
         Report_error_when_not_all_code_paths_in_function_return_a_value: { code: 6075, category: DiagnosticCategory.Message, key: "Report_error_when_not_all_code_paths_in_function_return_a_value_6075", message: "Report error when not all code paths in function return a value." },
         Report_errors_for_fallthrough_cases_in_switch_statement: { code: 6076, category: DiagnosticCategory.Message, key: "Report_errors_for_fallthrough_cases_in_switch_statement_6076", message: "Report errors for fallthrough cases in switch statement." },
         Do_not_report_errors_on_unreachable_code: { code: 6077, category: DiagnosticCategory.Message, key: "Do_not_report_errors_on_unreachable_code_6077", message: "Do not report errors on unreachable code." },
         Disallow_inconsistently_cased_references_to_the_same_file: { code: 6078, category: DiagnosticCategory.Message, key: "Disallow_inconsistently_cased_references_to_the_same_file_6078", message: "Disallow inconsistently-cased references to the same file." },
         Specify_library_files_to_be_included_in_the_compilation_Colon: { code: 6079, category: DiagnosticCategory.Message, key: "Specify_library_files_to_be_included_in_the_compilation_Colon_6079", message: "Specify library files to be included in the compilation: " },
-        Specify_JSX_code_generation_Colon_preserve_or_react: { code: 6080, category: DiagnosticCategory.Message, key: "Specify_JSX_code_generation_Colon_preserve_or_react_6080", message: "Specify JSX code generation: 'preserve' or 'react'" },
+        Specify_JSX_code_generation_Colon_preserve_react_native_or_react: { code: 6080, category: DiagnosticCategory.Message, key: "Specify_JSX_code_generation_Colon_preserve_react_native_or_react_6080", message: "Specify JSX code generation: 'preserve', 'react-native', or 'react'." },
+        File_0_has_an_unsupported_extension_so_skipping_it: { code: 6081, category: DiagnosticCategory.Message, key: "File_0_has_an_unsupported_extension_so_skipping_it_6081", message: "File '{0}' has an unsupported extension, so skipping it." },
         Only_amd_and_system_modules_are_supported_alongside_0: { code: 6082, category: DiagnosticCategory.Error, key: "Only_amd_and_system_modules_are_supported_alongside_0_6082", message: "Only 'amd' and 'system' modules are supported alongside --{0}." },
         Base_directory_to_resolve_non_absolute_module_names: { code: 6083, category: DiagnosticCategory.Message, key: "Base_directory_to_resolve_non_absolute_module_names_6083", message: "Base directory to resolve non-absolute module names." },
-        Specify_the_object_invoked_for_createElement_and_spread_when_targeting_react_JSX_emit: { code: 6084, category: DiagnosticCategory.Message, key: "Specify_the_object_invoked_for_createElement_and_spread_when_targeting_react_JSX_emit_6084", message: "Specify the object invoked for createElement and __spread when targeting 'react' JSX emit" },
+        Deprecated_Use_jsxFactory_instead_Specify_the_object_invoked_for_createElement_when_targeting_react_JSX_emit: { code: 6084, category: DiagnosticCategory.Message, key: "Deprecated_Use_jsxFactory_instead_Specify_the_object_invoked_for_createElement_when_targeting_react__6084", message: "[Deprecated] Use '--jsxFactory' instead. Specify the object invoked for createElement when targeting 'react' JSX emit" },
         Enable_tracing_of_the_name_resolution_process: { code: 6085, category: DiagnosticCategory.Message, key: "Enable_tracing_of_the_name_resolution_process_6085", message: "Enable tracing of the name resolution process." },
         Resolving_module_0_from_1: { code: 6086, category: DiagnosticCategory.Message, key: "Resolving_module_0_from_1_6086", message: "======== Resolving module '{0}' from '{1}'. ========" },
         Explicitly_specified_module_resolution_kind_Colon_0: { code: 6087, category: DiagnosticCategory.Message, key: "Explicitly_specified_module_resolution_kind_Colon_0_6087", message: "Explicitly specified module resolution kind: '{0}'." },
@@ -672,23 +734,23 @@ namespace ts {
         Module_name_0_matched_pattern_1: { code: 6092, category: DiagnosticCategory.Message, key: "Module_name_0_matched_pattern_1_6092", message: "Module name '{0}', matched pattern '{1}'." },
         Trying_substitution_0_candidate_module_location_Colon_1: { code: 6093, category: DiagnosticCategory.Message, key: "Trying_substitution_0_candidate_module_location_Colon_1_6093", message: "Trying substitution '{0}', candidate module location: '{1}'." },
         Resolving_module_name_0_relative_to_base_url_1_2: { code: 6094, category: DiagnosticCategory.Message, key: "Resolving_module_name_0_relative_to_base_url_1_2_6094", message: "Resolving module name '{0}' relative to base url '{1}' - '{2}'." },
-        Loading_module_as_file_Slash_folder_candidate_module_location_0: { code: 6095, category: DiagnosticCategory.Message, key: "Loading_module_as_file_Slash_folder_candidate_module_location_0_6095", message: "Loading module as file / folder, candidate module location '{0}'." },
+        Loading_module_as_file_Slash_folder_candidate_module_location_0_target_file_type_1: { code: 6095, category: DiagnosticCategory.Message, key: "Loading_module_as_file_Slash_folder_candidate_module_location_0_target_file_type_1_6095", message: "Loading module as file / folder, candidate module location '{0}', target file type '{1}'." },
         File_0_does_not_exist: { code: 6096, category: DiagnosticCategory.Message, key: "File_0_does_not_exist_6096", message: "File '{0}' does not exist." },
         File_0_exist_use_it_as_a_name_resolution_result: { code: 6097, category: DiagnosticCategory.Message, key: "File_0_exist_use_it_as_a_name_resolution_result_6097", message: "File '{0}' exist - use it as a name resolution result." },
-        Loading_module_0_from_node_modules_folder: { code: 6098, category: DiagnosticCategory.Message, key: "Loading_module_0_from_node_modules_folder_6098", message: "Loading module '{0}' from 'node_modules' folder." },
+        Loading_module_0_from_node_modules_folder_target_file_type_1: { code: 6098, category: DiagnosticCategory.Message, key: "Loading_module_0_from_node_modules_folder_target_file_type_1_6098", message: "Loading module '{0}' from 'node_modules' folder, target file type '{1}'." },
         Found_package_json_at_0: { code: 6099, category: DiagnosticCategory.Message, key: "Found_package_json_at_0_6099", message: "Found 'package.json' at '{0}'." },
-        package_json_does_not_have_types_field: { code: 6100, category: DiagnosticCategory.Message, key: "package_json_does_not_have_types_field_6100", message: "'package.json' does not have 'types' field." },
+        package_json_does_not_have_a_0_field: { code: 6100, category: DiagnosticCategory.Message, key: "package_json_does_not_have_a_0_field_6100", message: "'package.json' does not have a '{0}' field." },
         package_json_has_0_field_1_that_references_2: { code: 6101, category: DiagnosticCategory.Message, key: "package_json_has_0_field_1_that_references_2_6101", message: "'package.json' has '{0}' field '{1}' that references '{2}'." },
         Allow_javascript_files_to_be_compiled: { code: 6102, category: DiagnosticCategory.Message, key: "Allow_javascript_files_to_be_compiled_6102", message: "Allow javascript files to be compiled." },
         Option_0_should_have_array_of_strings_as_a_value: { code: 6103, category: DiagnosticCategory.Error, key: "Option_0_should_have_array_of_strings_as_a_value_6103", message: "Option '{0}' should have array of strings as a value." },
         Checking_if_0_is_the_longest_matching_prefix_for_1_2: { code: 6104, category: DiagnosticCategory.Message, key: "Checking_if_0_is_the_longest_matching_prefix_for_1_2_6104", message: "Checking if '{0}' is the longest matching prefix for '{1}' - '{2}'." },
         Expected_type_of_0_field_in_package_json_to_be_string_got_1: { code: 6105, category: DiagnosticCategory.Message, key: "Expected_type_of_0_field_in_package_json_to_be_string_got_1_6105", message: "Expected type of '{0}' field in 'package.json' to be 'string', got '{1}'." },
-        baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1: { code: 6106, category: DiagnosticCategory.Message, key: "baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1_6106", message: "'baseUrl' option is set to '{0}', using this value to resolve non-relative module name '{1}'" },
-        rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0: { code: 6107, category: DiagnosticCategory.Message, key: "rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0_6107", message: "'rootDirs' option is set, using it to resolve relative module name '{0}'" },
-        Longest_matching_prefix_for_0_is_1: { code: 6108, category: DiagnosticCategory.Message, key: "Longest_matching_prefix_for_0_is_1_6108", message: "Longest matching prefix for '{0}' is '{1}'" },
-        Loading_0_from_the_root_dir_1_candidate_location_2: { code: 6109, category: DiagnosticCategory.Message, key: "Loading_0_from_the_root_dir_1_candidate_location_2_6109", message: "Loading '{0}' from the root dir '{1}', candidate location '{2}'" },
-        Trying_other_entries_in_rootDirs: { code: 6110, category: DiagnosticCategory.Message, key: "Trying_other_entries_in_rootDirs_6110", message: "Trying other entries in 'rootDirs'" },
-        Module_resolution_using_rootDirs_has_failed: { code: 6111, category: DiagnosticCategory.Message, key: "Module_resolution_using_rootDirs_has_failed_6111", message: "Module resolution using 'rootDirs' has failed" },
+        baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1: { code: 6106, category: DiagnosticCategory.Message, key: "baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1_6106", message: "'baseUrl' option is set to '{0}', using this value to resolve non-relative module name '{1}'." },
+        rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0: { code: 6107, category: DiagnosticCategory.Message, key: "rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0_6107", message: "'rootDirs' option is set, using it to resolve relative module name '{0}'." },
+        Longest_matching_prefix_for_0_is_1: { code: 6108, category: DiagnosticCategory.Message, key: "Longest_matching_prefix_for_0_is_1_6108", message: "Longest matching prefix for '{0}' is '{1}'." },
+        Loading_0_from_the_root_dir_1_candidate_location_2: { code: 6109, category: DiagnosticCategory.Message, key: "Loading_0_from_the_root_dir_1_candidate_location_2_6109", message: "Loading '{0}' from the root dir '{1}', candidate location '{2}'." },
+        Trying_other_entries_in_rootDirs: { code: 6110, category: DiagnosticCategory.Message, key: "Trying_other_entries_in_rootDirs_6110", message: "Trying other entries in 'rootDirs'." },
+        Module_resolution_using_rootDirs_has_failed: { code: 6111, category: DiagnosticCategory.Message, key: "Module_resolution_using_rootDirs_has_failed_6111", message: "Module resolution using 'rootDirs' has failed." },
         Do_not_emit_use_strict_directives_in_module_output: { code: 6112, category: DiagnosticCategory.Message, key: "Do_not_emit_use_strict_directives_in_module_output_6112", message: "Do not emit 'use strict' directives in module output." },
         Enable_strict_null_checks: { code: 6113, category: DiagnosticCategory.Message, key: "Enable_strict_null_checks_6113", message: "Enable strict null checks." },
         Unknown_option_excludes_Did_you_mean_exclude: { code: 6114, category: DiagnosticCategory.Error, key: "Unknown_option_excludes_Did_you_mean_exclude_6114", message: "Unknown option 'excludes'. Did you mean 'exclude'?" },
@@ -698,26 +760,71 @@ namespace ts {
         Resolving_from_node_modules_folder: { code: 6118, category: DiagnosticCategory.Message, key: "Resolving_from_node_modules_folder_6118", message: "Resolving from node_modules folder..." },
         Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2: { code: 6119, category: DiagnosticCategory.Message, key: "Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2_6119", message: "======== Type reference directive '{0}' was successfully resolved to '{1}', primary: {2}. ========" },
         Type_reference_directive_0_was_not_resolved: { code: 6120, category: DiagnosticCategory.Message, key: "Type_reference_directive_0_was_not_resolved_6120", message: "======== Type reference directive '{0}' was not resolved. ========" },
-        Resolving_with_primary_search_path_0: { code: 6121, category: DiagnosticCategory.Message, key: "Resolving_with_primary_search_path_0_6121", message: "Resolving with primary search path '{0}'" },
+        Resolving_with_primary_search_path_0: { code: 6121, category: DiagnosticCategory.Message, key: "Resolving_with_primary_search_path_0_6121", message: "Resolving with primary search path '{0}'." },
         Root_directory_cannot_be_determined_skipping_primary_search_paths: { code: 6122, category: DiagnosticCategory.Message, key: "Root_directory_cannot_be_determined_skipping_primary_search_paths_6122", message: "Root directory cannot be determined, skipping primary search paths." },
         Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set: { code: 6123, category: DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set_6123", message: "======== Resolving type reference directive '{0}', containing file '{1}', root directory not set. ========" },
         Type_declaration_files_to_be_included_in_compilation: { code: 6124, category: DiagnosticCategory.Message, key: "Type_declaration_files_to_be_included_in_compilation_6124", message: "Type declaration files to be included in compilation." },
-        Looking_up_in_node_modules_folder_initial_location_0: { code: 6125, category: DiagnosticCategory.Message, key: "Looking_up_in_node_modules_folder_initial_location_0_6125", message: "Looking up in 'node_modules' folder, initial location '{0}'" },
+        Looking_up_in_node_modules_folder_initial_location_0: { code: 6125, category: DiagnosticCategory.Message, key: "Looking_up_in_node_modules_folder_initial_location_0_6125", message: "Looking up in 'node_modules' folder, initial location '{0}'." },
         Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_modules_folder: { code: 6126, category: DiagnosticCategory.Message, key: "Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_mod_6126", message: "Containing file is not specified and root directory cannot be determined, skipping lookup in 'node_modules' folder." },
         Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1: { code: 6127, category: DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1_6127", message: "======== Resolving type reference directive '{0}', containing file not set, root directory '{1}'. ========" },
         Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set: { code: 6128, category: DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set_6128", message: "======== Resolving type reference directive '{0}', containing file not set, root directory not set. ========" },
         The_config_file_0_found_doesn_t_contain_any_source_files: { code: 6129, category: DiagnosticCategory.Error, key: "The_config_file_0_found_doesn_t_contain_any_source_files_6129", message: "The config file '{0}' found doesn't contain any source files." },
-        Resolving_real_path_for_0_result_1: { code: 6130, category: DiagnosticCategory.Message, key: "Resolving_real_path_for_0_result_1_6130", message: "Resolving real path for '{0}', result '{1}'" },
+        Resolving_real_path_for_0_result_1: { code: 6130, category: DiagnosticCategory.Message, key: "Resolving_real_path_for_0_result_1_6130", message: "Resolving real path for '{0}', result '{1}'." },
         Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system: { code: 6131, category: DiagnosticCategory.Error, key: "Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system_6131", message: "Cannot compile modules using option '{0}' unless the '--module' flag is 'amd' or 'system'." },
-        File_name_0_has_a_1_extension_stripping_it: { code: 6132, category: DiagnosticCategory.Message, key: "File_name_0_has_a_1_extension_stripping_it_6132", message: "File name '{0}' has a '{1}' extension - stripping it" },
+        File_name_0_has_a_1_extension_stripping_it: { code: 6132, category: DiagnosticCategory.Message, key: "File_name_0_has_a_1_extension_stripping_it_6132", message: "File name '{0}' has a '{1}' extension - stripping it." },
         _0_is_declared_but_never_used: { code: 6133, category: DiagnosticCategory.Error, key: "_0_is_declared_but_never_used_6133", message: "'{0}' is declared but never used." },
         Report_errors_on_unused_locals: { code: 6134, category: DiagnosticCategory.Message, key: "Report_errors_on_unused_locals_6134", message: "Report errors on unused locals." },
         Report_errors_on_unused_parameters: { code: 6135, category: DiagnosticCategory.Message, key: "Report_errors_on_unused_parameters_6135", message: "Report errors on unused parameters." },
-        The_maximum_dependency_depth_to_search_under_node_modules_and_load_JavaScript_files: { code: 6136, category: DiagnosticCategory.Message, key: "The_maximum_dependency_depth_to_search_under_node_modules_and_load_JavaScript_files_6136", message: "The maximum dependency depth to search under node_modules and load JavaScript files" },
-        No_types_specified_in_package_json_but_allowJs_is_set_so_returning_main_value_of_0: { code: 6137, category: DiagnosticCategory.Message, key: "No_types_specified_in_package_json_but_allowJs_is_set_so_returning_main_value_of_0_6137", message: "No types specified in 'package.json' but 'allowJs' is set, so returning 'main' value of '{0}'" },
+        The_maximum_dependency_depth_to_search_under_node_modules_and_load_JavaScript_files: { code: 6136, category: DiagnosticCategory.Message, key: "The_maximum_dependency_depth_to_search_under_node_modules_and_load_JavaScript_files_6136", message: "The maximum dependency depth to search under node_modules and load JavaScript files." },
+        Cannot_import_type_declaration_files_Consider_importing_0_instead_of_1: { code: 6137, category: DiagnosticCategory.Error, key: "Cannot_import_type_declaration_files_Consider_importing_0_instead_of_1_6137", message: "Cannot import type declaration files. Consider importing '{0}' instead of '{1}'." },
         Property_0_is_declared_but_never_used: { code: 6138, category: DiagnosticCategory.Error, key: "Property_0_is_declared_but_never_used_6138", message: "Property '{0}' is declared but never used." },
         Import_emit_helpers_from_tslib: { code: 6139, category: DiagnosticCategory.Message, key: "Import_emit_helpers_from_tslib_6139", message: "Import emit helpers from 'tslib'." },
         Auto_discovery_for_typings_is_enabled_in_project_0_Running_extra_resolution_pass_for_module_1_using_cache_location_2: { code: 6140, category: DiagnosticCategory.Error, key: "Auto_discovery_for_typings_is_enabled_in_project_0_Running_extra_resolution_pass_for_module_1_using__6140", message: "Auto discovery for typings is enabled in project '{0}'. Running extra resolution pass for module '{1}' using cache location '{2}'." },
+        Parse_in_strict_mode_and_emit_use_strict_for_each_source_file: { code: 6141, category: DiagnosticCategory.Message, key: "Parse_in_strict_mode_and_emit_use_strict_for_each_source_file_6141", message: "Parse in strict mode and emit \"use strict\" for each source file." },
+        Module_0_was_resolved_to_1_but_jsx_is_not_set: { code: 6142, category: DiagnosticCategory.Error, key: "Module_0_was_resolved_to_1_but_jsx_is_not_set_6142", message: "Module '{0}' was resolved to '{1}', but '--jsx' is not set." },
+        Module_0_was_resolved_to_1_but_allowJs_is_not_set: { code: 6143, category: DiagnosticCategory.Error, key: "Module_0_was_resolved_to_1_but_allowJs_is_not_set_6143", message: "Module '{0}' was resolved to '{1}', but '--allowJs' is not set." },
+        Module_0_was_resolved_as_locally_declared_ambient_module_in_file_1: { code: 6144, category: DiagnosticCategory.Message, key: "Module_0_was_resolved_as_locally_declared_ambient_module_in_file_1_6144", message: "Module '{0}' was resolved as locally declared ambient module in file '{1}'." },
+        Module_0_was_resolved_as_ambient_module_declared_in_1_since_this_file_was_not_modified: { code: 6145, category: DiagnosticCategory.Message, key: "Module_0_was_resolved_as_ambient_module_declared_in_1_since_this_file_was_not_modified_6145", message: "Module '{0}' was resolved as ambient module declared in '{1}' since this file was not modified." },
+        Specify_the_JSX_factory_function_to_use_when_targeting_react_JSX_emit_e_g_React_createElement_or_h: { code: 6146, category: DiagnosticCategory.Message, key: "Specify_the_JSX_factory_function_to_use_when_targeting_react_JSX_emit_e_g_React_createElement_or_h_6146", message: "Specify the JSX factory function to use when targeting 'react' JSX emit, e.g. 'React.createElement' or 'h'." },
+        Resolution_for_module_0_was_found_in_cache: { code: 6147, category: DiagnosticCategory.Message, key: "Resolution_for_module_0_was_found_in_cache_6147", message: "Resolution for module '{0}' was found in cache." },
+        Directory_0_does_not_exist_skipping_all_lookups_in_it: { code: 6148, category: DiagnosticCategory.Message, key: "Directory_0_does_not_exist_skipping_all_lookups_in_it_6148", message: "Directory '{0}' does not exist, skipping all lookups in it." },
+        Show_diagnostic_information: { code: 6149, category: DiagnosticCategory.Message, key: "Show_diagnostic_information_6149", message: "Show diagnostic information." },
+        Show_verbose_diagnostic_information: { code: 6150, category: DiagnosticCategory.Message, key: "Show_verbose_diagnostic_information_6150", message: "Show verbose diagnostic information." },
+        Emit_a_single_file_with_source_maps_instead_of_having_a_separate_file: { code: 6151, category: DiagnosticCategory.Message, key: "Emit_a_single_file_with_source_maps_instead_of_having_a_separate_file_6151", message: "Emit a single file with source maps instead of having a separate file." },
+        Emit_the_source_alongside_the_sourcemaps_within_a_single_file_requires_inlineSourceMap_or_sourceMap_to_be_set: { code: 6152, category: DiagnosticCategory.Message, key: "Emit_the_source_alongside_the_sourcemaps_within_a_single_file_requires_inlineSourceMap_or_sourceMap__6152", message: "Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set." },
+        Transpile_each_file_as_a_separate_module_similar_to_ts_transpileModule: { code: 6153, category: DiagnosticCategory.Message, key: "Transpile_each_file_as_a_separate_module_similar_to_ts_transpileModule_6153", message: "Transpile each file as a separate module (similar to 'ts.transpileModule')." },
+        Print_names_of_generated_files_part_of_the_compilation: { code: 6154, category: DiagnosticCategory.Message, key: "Print_names_of_generated_files_part_of_the_compilation_6154", message: "Print names of generated files part of the compilation." },
+        Print_names_of_files_part_of_the_compilation: { code: 6155, category: DiagnosticCategory.Message, key: "Print_names_of_files_part_of_the_compilation_6155", message: "Print names of files part of the compilation." },
+        The_locale_used_when_displaying_messages_to_the_user_e_g_en_us: { code: 6156, category: DiagnosticCategory.Message, key: "The_locale_used_when_displaying_messages_to_the_user_e_g_en_us_6156", message: "The locale used when displaying messages to the user (e.g. 'en-us')" },
+        Do_not_generate_custom_helper_functions_like_extends_in_compiled_output: { code: 6157, category: DiagnosticCategory.Message, key: "Do_not_generate_custom_helper_functions_like_extends_in_compiled_output_6157", message: "Do not generate custom helper functions like '__extends' in compiled output." },
+        Do_not_include_the_default_library_file_lib_d_ts: { code: 6158, category: DiagnosticCategory.Message, key: "Do_not_include_the_default_library_file_lib_d_ts_6158", message: "Do not include the default library file (lib.d.ts)." },
+        Do_not_add_triple_slash_references_or_imported_modules_to_the_list_of_compiled_files: { code: 6159, category: DiagnosticCategory.Message, key: "Do_not_add_triple_slash_references_or_imported_modules_to_the_list_of_compiled_files_6159", message: "Do not add triple-slash references or imported modules to the list of compiled files." },
+        Deprecated_Use_skipLibCheck_instead_Skip_type_checking_of_default_library_declaration_files: { code: 6160, category: DiagnosticCategory.Message, key: "Deprecated_Use_skipLibCheck_instead_Skip_type_checking_of_default_library_declaration_files_6160", message: "[Deprecated] Use '--skipLibCheck' instead. Skip type checking of default library declaration files." },
+        List_of_folders_to_include_type_definitions_from: { code: 6161, category: DiagnosticCategory.Message, key: "List_of_folders_to_include_type_definitions_from_6161", message: "List of folders to include type definitions from." },
+        Disable_size_limitations_on_JavaScript_projects: { code: 6162, category: DiagnosticCategory.Message, key: "Disable_size_limitations_on_JavaScript_projects_6162", message: "Disable size limitations on JavaScript projects." },
+        The_character_set_of_the_input_files: { code: 6163, category: DiagnosticCategory.Message, key: "The_character_set_of_the_input_files_6163", message: "The character set of the input files." },
+        Emit_a_UTF_8_Byte_Order_Mark_BOM_in_the_beginning_of_output_files: { code: 6164, category: DiagnosticCategory.Message, key: "Emit_a_UTF_8_Byte_Order_Mark_BOM_in_the_beginning_of_output_files_6164", message: "Emit a UTF-8 Byte Order Mark (BOM) in the beginning of output files." },
+        Do_not_truncate_error_messages: { code: 6165, category: DiagnosticCategory.Message, key: "Do_not_truncate_error_messages_6165", message: "Do not truncate error messages." },
+        Output_directory_for_generated_declaration_files: { code: 6166, category: DiagnosticCategory.Message, key: "Output_directory_for_generated_declaration_files_6166", message: "Output directory for generated declaration files." },
+        A_series_of_entries_which_re_map_imports_to_lookup_locations_relative_to_the_baseUrl: { code: 6167, category: DiagnosticCategory.Message, key: "A_series_of_entries_which_re_map_imports_to_lookup_locations_relative_to_the_baseUrl_6167", message: "A series of entries which re-map imports to lookup locations relative to the 'baseUrl'." },
+        List_of_root_folders_whose_combined_content_represents_the_structure_of_the_project_at_runtime: { code: 6168, category: DiagnosticCategory.Message, key: "List_of_root_folders_whose_combined_content_represents_the_structure_of_the_project_at_runtime_6168", message: "List of root folders whose combined content represents the structure of the project at runtime." },
+        Show_all_compiler_options: { code: 6169, category: DiagnosticCategory.Message, key: "Show_all_compiler_options_6169", message: "Show all compiler options." },
+        Deprecated_Use_outFile_instead_Concatenate_and_emit_output_to_single_file: { code: 6170, category: DiagnosticCategory.Message, key: "Deprecated_Use_outFile_instead_Concatenate_and_emit_output_to_single_file_6170", message: "[Deprecated] Use '--outFile' instead. Concatenate and emit output to single file" },
+        Command_line_Options: { code: 6171, category: DiagnosticCategory.Message, key: "Command_line_Options_6171", message: "Command-line Options" },
+        Basic_Options: { code: 6172, category: DiagnosticCategory.Message, key: "Basic_Options_6172", message: "Basic Options" },
+        Strict_Type_Checking_Options: { code: 6173, category: DiagnosticCategory.Message, key: "Strict_Type_Checking_Options_6173", message: "Strict Type-Checking Options" },
+        Module_Resolution_Options: { code: 6174, category: DiagnosticCategory.Message, key: "Module_Resolution_Options_6174", message: "Module Resolution Options" },
+        Source_Map_Options: { code: 6175, category: DiagnosticCategory.Message, key: "Source_Map_Options_6175", message: "Source Map Options" },
+        Additional_Checks: { code: 6176, category: DiagnosticCategory.Message, key: "Additional_Checks_6176", message: "Additional Checks" },
+        Experimental_Options: { code: 6177, category: DiagnosticCategory.Message, key: "Experimental_Options_6177", message: "Experimental Options" },
+        Advanced_Options: { code: 6178, category: DiagnosticCategory.Message, key: "Advanced_Options_6178", message: "Advanced Options" },
+        Provide_full_support_for_iterables_in_for_of_spread_and_destructuring_when_targeting_ES5_or_ES3: { code: 6179, category: DiagnosticCategory.Message, key: "Provide_full_support_for_iterables_in_for_of_spread_and_destructuring_when_targeting_ES5_or_ES3_6179", message: "Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'." },
+        Enable_all_strict_type_checking_options: { code: 6180, category: DiagnosticCategory.Message, key: "Enable_all_strict_type_checking_options_6180", message: "Enable all strict type-checking options." },
+        List_of_language_service_plugins: { code: 6181, category: DiagnosticCategory.Message, key: "List_of_language_service_plugins_6181", message: "List of language service plugins." },
+        Scoped_package_detected_looking_in_0: { code: 6182, category: DiagnosticCategory.Message, key: "Scoped_package_detected_looking_in_0_6182", message: "Scoped package detected, looking in '{0}'" },
+        Reusing_resolution_of_module_0_to_file_1_from_old_program: { code: 6183, category: DiagnosticCategory.Message, key: "Reusing_resolution_of_module_0_to_file_1_from_old_program_6183", message: "Reusing resolution of module '{0}' to file '{1}' from old program." },
+        Reusing_module_resolutions_originating_in_0_since_resolutions_are_unchanged_from_old_program: { code: 6184, category: DiagnosticCategory.Message, key: "Reusing_module_resolutions_originating_in_0_since_resolutions_are_unchanged_from_old_program_6184", message: "Reusing module resolutions originating in '{0}' since resolutions are unchanged from old program." },
+        Disable_strict_checking_of_generic_signatures_in_function_types: { code: 6185, category: DiagnosticCategory.Message, key: "Disable_strict_checking_of_generic_signatures_in_function_types_6185", message: "Disable strict checking of generic signatures in function types." },
         Variable_0_implicitly_has_an_1_type: { code: 7005, category: DiagnosticCategory.Error, key: "Variable_0_implicitly_has_an_1_type_7005", message: "Variable '{0}' implicitly has an '{1}' type." },
         Parameter_0_implicitly_has_an_1_type: { code: 7006, category: DiagnosticCategory.Error, key: "Parameter_0_implicitly_has_an_1_type_7006", message: "Parameter '{0}' implicitly has an '{1}' type." },
         Member_0_implicitly_has_an_1_type: { code: 7008, category: DiagnosticCategory.Error, key: "Member_0_implicitly_has_an_1_type_7008", message: "Member '{0}' implicitly has an '{1}' type." },
@@ -726,7 +833,8 @@ namespace ts {
         Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type: { code: 7011, category: DiagnosticCategory.Error, key: "Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type_7011", message: "Function expression, which lacks return-type annotation, implicitly has an '{0}' return type." },
         Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type: { code: 7013, category: DiagnosticCategory.Error, key: "Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type_7013", message: "Construct signature, which lacks return-type annotation, implicitly has an 'any' return type." },
         Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number: { code: 7015, category: DiagnosticCategory.Error, key: "Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number_7015", message: "Element implicitly has an 'any' type because index expression is not of type 'number'." },
-        Index_signature_of_object_type_implicitly_has_an_any_type: { code: 7017, category: DiagnosticCategory.Error, key: "Index_signature_of_object_type_implicitly_has_an_any_type_7017", message: "Index signature of object type implicitly has an 'any' type." },
+        Could_not_find_a_declaration_file_for_module_0_1_implicitly_has_an_any_type: { code: 7016, category: DiagnosticCategory.Error, key: "Could_not_find_a_declaration_file_for_module_0_1_implicitly_has_an_any_type_7016", message: "Could not find a declaration file for module '{0}'. '{1}' implicitly has an 'any' type." },
+        Element_implicitly_has_an_any_type_because_type_0_has_no_index_signature: { code: 7017, category: DiagnosticCategory.Error, key: "Element_implicitly_has_an_any_type_because_type_0_has_no_index_signature_7017", message: "Element implicitly has an 'any' type because type '{0}' has no index signature." },
         Object_literal_s_property_0_implicitly_has_an_1_type: { code: 7018, category: DiagnosticCategory.Error, key: "Object_literal_s_property_0_implicitly_has_an_1_type_7018", message: "Object literal's property '{0}' implicitly has an '{1}' type." },
         Rest_parameter_0_implicitly_has_an_any_type: { code: 7019, category: DiagnosticCategory.Error, key: "Rest_parameter_0_implicitly_has_an_any_type_7019", message: "Rest parameter '{0}' implicitly has an 'any[]' type." },
         Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type: { code: 7020, category: DiagnosticCategory.Error, key: "Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type_7020", message: "Call signature, which lacks return-type annotation, implicitly has an 'any' return type." },
@@ -734,7 +842,7 @@ namespace ts {
         _0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions: { code: 7023, category: DiagnosticCategory.Error, key: "_0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_reference_7023", message: "'{0}' implicitly has return type 'any' because it does not have a return type annotation and is referenced directly or indirectly in one of its return expressions." },
         Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions: { code: 7024, category: DiagnosticCategory.Error, key: "Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_ref_7024", message: "Function implicitly has return type 'any' because it does not have a return type annotation and is referenced directly or indirectly in one of its return expressions." },
         Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_type: { code: 7025, category: DiagnosticCategory.Error, key: "Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_typ_7025", message: "Generator implicitly has type '{0}' because it does not yield any values. Consider supplying a return type." },
-        JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists: { code: 7026, category: DiagnosticCategory.Error, key: "JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists_7026", message: "JSX element implicitly has type 'any' because no interface 'JSX.{0}' exists" },
+        JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists: { code: 7026, category: DiagnosticCategory.Error, key: "JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists_7026", message: "JSX element implicitly has type 'any' because no interface 'JSX.{0}' exists." },
         Unreachable_code_detected: { code: 7027, category: DiagnosticCategory.Error, key: "Unreachable_code_detected_7027", message: "Unreachable code detected." },
         Unused_label: { code: 7028, category: DiagnosticCategory.Error, key: "Unused_label_7028", message: "Unused label." },
         Fallthrough_case_in_switch: { code: 7029, category: DiagnosticCategory.Error, key: "Fallthrough_case_in_switch_7029", message: "Fallthrough case in switch." },
@@ -742,6 +850,9 @@ namespace ts {
         Binding_element_0_implicitly_has_an_1_type: { code: 7031, category: DiagnosticCategory.Error, key: "Binding_element_0_implicitly_has_an_1_type_7031", message: "Binding element '{0}' implicitly has an '{1}' type." },
         Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_parameter_type_annotation: { code: 7032, category: DiagnosticCategory.Error, key: "Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_parameter_type_annotation_7032", message: "Property '{0}' implicitly has type 'any', because its set accessor lacks a parameter type annotation." },
         Property_0_implicitly_has_type_any_because_its_get_accessor_lacks_a_return_type_annotation: { code: 7033, category: DiagnosticCategory.Error, key: "Property_0_implicitly_has_type_any_because_its_get_accessor_lacks_a_return_type_annotation_7033", message: "Property '{0}' implicitly has type 'any', because its get accessor lacks a return type annotation." },
+        Variable_0_implicitly_has_type_1_in_some_locations_where_its_type_cannot_be_determined: { code: 7034, category: DiagnosticCategory.Error, key: "Variable_0_implicitly_has_type_1_in_some_locations_where_its_type_cannot_be_determined_7034", message: "Variable '{0}' implicitly has type '{1}' in some locations where its type cannot be determined." },
+        Try_npm_install_types_Slash_0_if_it_exists_or_add_a_new_declaration_d_ts_file_containing_declare_module_0: { code: 7035, category: DiagnosticCategory.Error, key: "Try_npm_install_types_Slash_0_if_it_exists_or_add_a_new_declaration_d_ts_file_containing_declare_mod_7035", message: "Try `npm install @types/{0}` if it exists or add a new declaration (.d.ts) file containing `declare module '{0}';`" },
+        Dynamic_import_s_specifier_must_be_of_type_string_but_here_has_type_0: { code: 7036, category: DiagnosticCategory.Error, key: "Dynamic_import_s_specifier_must_be_of_type_string_but_here_has_type_0_7036", message: "Dynamic import's specifier must be of type 'string', but here has type '{0}'." },
         You_cannot_rename_this_element: { code: 8000, category: DiagnosticCategory.Error, key: "You_cannot_rename_this_element_8000", message: "You cannot rename this element." },
         You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library: { code: 8001, category: DiagnosticCategory.Error, key: "You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library_8001", message: "You cannot rename elements that are defined in the standard TypeScript library." },
         import_can_only_be_used_in_a_ts_file: { code: 8002, category: DiagnosticCategory.Error, key: "import_can_only_be_used_in_a_ts_file_8002", message: "'import ... =' can only be used in a .ts file." },
@@ -757,20 +868,53 @@ namespace ts {
         parameter_modifiers_can_only_be_used_in_a_ts_file: { code: 8012, category: DiagnosticCategory.Error, key: "parameter_modifiers_can_only_be_used_in_a_ts_file_8012", message: "'parameter modifiers' can only be used in a .ts file." },
         enum_declarations_can_only_be_used_in_a_ts_file: { code: 8015, category: DiagnosticCategory.Error, key: "enum_declarations_can_only_be_used_in_a_ts_file_8015", message: "'enum declarations' can only be used in a .ts file." },
         type_assertion_expressions_can_only_be_used_in_a_ts_file: { code: 8016, category: DiagnosticCategory.Error, key: "type_assertion_expressions_can_only_be_used_in_a_ts_file_8016", message: "'type assertion expressions' can only be used in a .ts file." },
-        Only_identifiers_Slashqualified_names_with_optional_type_arguments_are_currently_supported_in_a_class_extends_clauses: { code: 9002, category: DiagnosticCategory.Error, key: "Only_identifiers_Slashqualified_names_with_optional_type_arguments_are_currently_supported_in_a_clas_9002", message: "Only identifiers/qualified-names with optional type arguments are currently supported in a class 'extends' clauses." },
+        Only_identifiers_Slashqualified_names_with_optional_type_arguments_are_currently_supported_in_a_class_extends_clause: { code: 9002, category: DiagnosticCategory.Error, key: "Only_identifiers_Slashqualified_names_with_optional_type_arguments_are_currently_supported_in_a_clas_9002", message: "Only identifiers/qualified-names with optional type arguments are currently supported in a class 'extends' clause." },
         class_expressions_are_not_currently_supported: { code: 9003, category: DiagnosticCategory.Error, key: "class_expressions_are_not_currently_supported_9003", message: "'class' expressions are not currently supported." },
+        Language_service_is_disabled: { code: 9004, category: DiagnosticCategory.Error, key: "Language_service_is_disabled_9004", message: "Language service is disabled." },
         JSX_attributes_must_only_be_assigned_a_non_empty_expression: { code: 17000, category: DiagnosticCategory.Error, key: "JSX_attributes_must_only_be_assigned_a_non_empty_expression_17000", message: "JSX attributes must only be assigned a non-empty 'expression'." },
         JSX_elements_cannot_have_multiple_attributes_with_the_same_name: { code: 17001, category: DiagnosticCategory.Error, key: "JSX_elements_cannot_have_multiple_attributes_with_the_same_name_17001", message: "JSX elements cannot have multiple attributes with the same name." },
         Expected_corresponding_JSX_closing_tag_for_0: { code: 17002, category: DiagnosticCategory.Error, key: "Expected_corresponding_JSX_closing_tag_for_0_17002", message: "Expected corresponding JSX closing tag for '{0}'." },
         JSX_attribute_expected: { code: 17003, category: DiagnosticCategory.Error, key: "JSX_attribute_expected_17003", message: "JSX attribute expected." },
         Cannot_use_JSX_unless_the_jsx_flag_is_provided: { code: 17004, category: DiagnosticCategory.Error, key: "Cannot_use_JSX_unless_the_jsx_flag_is_provided_17004", message: "Cannot use JSX unless the '--jsx' flag is provided." },
-        A_constructor_cannot_contain_a_super_call_when_its_class_extends_null: { code: 17005, category: DiagnosticCategory.Error, key: "A_constructor_cannot_contain_a_super_call_when_its_class_extends_null_17005", message: "A constructor cannot contain a 'super' call when its class extends 'null'" },
+        A_constructor_cannot_contain_a_super_call_when_its_class_extends_null: { code: 17005, category: DiagnosticCategory.Error, key: "A_constructor_cannot_contain_a_super_call_when_its_class_extends_null_17005", message: "A constructor cannot contain a 'super' call when its class extends 'null'." },
         An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses: { code: 17006, category: DiagnosticCategory.Error, key: "An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_ex_17006", message: "An unary expression with the '{0}' operator is not allowed in the left-hand side of an exponentiation expression. Consider enclosing the expression in parentheses." },
         A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses: { code: 17007, category: DiagnosticCategory.Error, key: "A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Con_17007", message: "A type assertion expression is not allowed in the left-hand side of an exponentiation expression. Consider enclosing the expression in parentheses." },
         JSX_element_0_has_no_corresponding_closing_tag: { code: 17008, category: DiagnosticCategory.Error, key: "JSX_element_0_has_no_corresponding_closing_tag_17008", message: "JSX element '{0}' has no corresponding closing tag." },
         super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class: { code: 17009, category: DiagnosticCategory.Error, key: "super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class_17009", message: "'super' must be called before accessing 'this' in the constructor of a derived class." },
-        Unknown_typing_option_0: { code: 17010, category: DiagnosticCategory.Error, key: "Unknown_typing_option_0_17010", message: "Unknown typing option '{0}'." },
+        Unknown_type_acquisition_option_0: { code: 17010, category: DiagnosticCategory.Error, key: "Unknown_type_acquisition_option_0_17010", message: "Unknown type acquisition option '{0}'." },
+        super_must_be_called_before_accessing_a_property_of_super_in_the_constructor_of_a_derived_class: { code: 17011, category: DiagnosticCategory.Error, key: "super_must_be_called_before_accessing_a_property_of_super_in_the_constructor_of_a_derived_class_17011", message: "'super' must be called before accessing a property of 'super' in the constructor of a derived class." },
+        _0_is_not_a_valid_meta_property_for_keyword_1_Did_you_mean_2: { code: 17012, category: DiagnosticCategory.Error, key: "_0_is_not_a_valid_meta_property_for_keyword_1_Did_you_mean_2_17012", message: "'{0}' is not a valid meta-property for keyword '{1}'. Did you mean '{2}'?" },
+        Meta_property_0_is_only_allowed_in_the_body_of_a_function_declaration_function_expression_or_constructor: { code: 17013, category: DiagnosticCategory.Error, key: "Meta_property_0_is_only_allowed_in_the_body_of_a_function_declaration_function_expression_or_constru_17013", message: "Meta-property '{0}' is only allowed in the body of a function declaration, function expression, or constructor." },
         Circularity_detected_while_resolving_configuration_Colon_0: { code: 18000, category: DiagnosticCategory.Error, key: "Circularity_detected_while_resolving_configuration_Colon_0_18000", message: "Circularity detected while resolving configuration: {0}" },
-        The_path_in_an_extends_options_must_be_relative_or_rooted: { code: 18001, category: DiagnosticCategory.Error, key: "The_path_in_an_extends_options_must_be_relative_or_rooted_18001", message: "The path in an 'extends' options must be relative or rooted." },
+        A_path_in_an_extends_option_must_be_relative_or_rooted_but_0_is_not: { code: 18001, category: DiagnosticCategory.Error, key: "A_path_in_an_extends_option_must_be_relative_or_rooted_but_0_is_not_18001", message: "A path in an 'extends' option must be relative or rooted, but '{0}' is not." },
+        The_files_list_in_config_file_0_is_empty: { code: 18002, category: DiagnosticCategory.Error, key: "The_files_list_in_config_file_0_is_empty_18002", message: "The 'files' list in config file '{0}' is empty." },
+        No_inputs_were_found_in_config_file_0_Specified_include_paths_were_1_and_exclude_paths_were_2: { code: 18003, category: DiagnosticCategory.Error, key: "No_inputs_were_found_in_config_file_0_Specified_include_paths_were_1_and_exclude_paths_were_2_18003", message: "No inputs were found in config file '{0}'. Specified 'include' paths were '{1}' and 'exclude' paths were '{2}'." },
+        Add_missing_super_call: { code: 90001, category: DiagnosticCategory.Message, key: "Add_missing_super_call_90001", message: "Add missing 'super()' call." },
+        Make_super_call_the_first_statement_in_the_constructor: { code: 90002, category: DiagnosticCategory.Message, key: "Make_super_call_the_first_statement_in_the_constructor_90002", message: "Make 'super()' call the first statement in the constructor." },
+        Change_extends_to_implements: { code: 90003, category: DiagnosticCategory.Message, key: "Change_extends_to_implements_90003", message: "Change 'extends' to 'implements'." },
+        Remove_declaration_for_Colon_0: { code: 90004, category: DiagnosticCategory.Message, key: "Remove_declaration_for_Colon_0_90004", message: "Remove declaration for: '{0}'." },
+        Implement_interface_0: { code: 90006, category: DiagnosticCategory.Message, key: "Implement_interface_0_90006", message: "Implement interface '{0}'." },
+        Implement_inherited_abstract_class: { code: 90007, category: DiagnosticCategory.Message, key: "Implement_inherited_abstract_class_90007", message: "Implement inherited abstract class." },
+        Add_this_to_unresolved_variable: { code: 90008, category: DiagnosticCategory.Message, key: "Add_this_to_unresolved_variable_90008", message: "Add 'this.' to unresolved variable." },
+        Adding_a_tsconfig_json_file_will_help_organize_projects_that_contain_both_TypeScript_and_JavaScript_files_Learn_more_at_https_Colon_Slash_Slashaka_ms_Slashtsconfig: { code: 90009, category: DiagnosticCategory.Error, key: "Adding_a_tsconfig_json_file_will_help_organize_projects_that_contain_both_TypeScript_and_JavaScript__90009", message: "Adding a tsconfig.json file will help organize projects that contain both TypeScript and JavaScript files. Learn more at https://aka.ms/tsconfig." },
+        Type_0_is_not_assignable_to_type_1_Two_different_types_with_this_name_exist_but_they_are_unrelated: { code: 90010, category: DiagnosticCategory.Error, key: "Type_0_is_not_assignable_to_type_1_Two_different_types_with_this_name_exist_but_they_are_unrelated_90010", message: "Type '{0}' is not assignable to type '{1}'. Two different types with this name exist, but they are unrelated." },
+        Import_0_from_1: { code: 90013, category: DiagnosticCategory.Message, key: "Import_0_from_1_90013", message: "Import {0} from {1}." },
+        Change_0_to_1: { code: 90014, category: DiagnosticCategory.Message, key: "Change_0_to_1_90014", message: "Change {0} to {1}." },
+        Add_0_to_existing_import_declaration_from_1: { code: 90015, category: DiagnosticCategory.Message, key: "Add_0_to_existing_import_declaration_from_1_90015", message: "Add {0} to existing import declaration from {1}." },
+        Declare_property_0: { code: 90016, category: DiagnosticCategory.Message, key: "Declare_property_0_90016", message: "Declare property '{0}'." },
+        Add_index_signature_for_property_0: { code: 90017, category: DiagnosticCategory.Message, key: "Add_index_signature_for_property_0_90017", message: "Add index signature for property '{0}'." },
+        Disable_checking_for_this_file: { code: 90018, category: DiagnosticCategory.Message, key: "Disable_checking_for_this_file_90018", message: "Disable checking for this file." },
+        Ignore_this_error_message: { code: 90019, category: DiagnosticCategory.Message, key: "Ignore_this_error_message_90019", message: "Ignore this error message." },
+        Initialize_property_0_in_the_constructor: { code: 90020, category: DiagnosticCategory.Message, key: "Initialize_property_0_in_the_constructor_90020", message: "Initialize property '{0}' in the constructor." },
+        Initialize_static_property_0: { code: 90021, category: DiagnosticCategory.Message, key: "Initialize_static_property_0_90021", message: "Initialize static property '{0}'." },
+        Change_spelling_to_0: { code: 90022, category: DiagnosticCategory.Message, key: "Change_spelling_to_0_90022", message: "Change spelling to '{0}'." },
+        Declare_method_0: { code: 90023, category: DiagnosticCategory.Message, key: "Declare_method_0_90023", message: "Declare method '{0}'." },
+        Declare_static_method_0: { code: 90024, category: DiagnosticCategory.Message, key: "Declare_static_method_0_90024", message: "Declare static method '{0}'." },
+        Prefix_0_with_an_underscore: { code: 90025, category: DiagnosticCategory.Message, key: "Prefix_0_with_an_underscore_90025", message: "Prefix '{0}' with an underscore." },
+        Convert_function_to_an_ES2015_class: { code: 95001, category: DiagnosticCategory.Message, key: "Convert_function_to_an_ES2015_class_95001", message: "Convert function to an ES2015 class" },
+        Convert_function_0_to_class: { code: 95002, category: DiagnosticCategory.Message, key: "Convert_function_0_to_class_95002", message: "Convert function '{0}' to class" },
+        Octal_literal_types_must_use_ES2015_syntax_Use_the_syntax_0: { code: 8017, category: DiagnosticCategory.Error, key: "Octal_literal_types_must_use_ES2015_syntax_Use_the_syntax_0_8017", message: "Octal literal types must use ES2015 syntax. Use the syntax '{0}'." },
+        Octal_literals_are_not_allowed_in_enums_members_initializer_Use_the_syntax_0: { code: 8018, category: DiagnosticCategory.Error, key: "Octal_literals_are_not_allowed_in_enums_members_initializer_Use_the_syntax_0_8018", message: "Octal literals are not allowed in enums members initializer. Use the syntax '{0}'." },
+        Report_errors_in_js_files: { code: 8019, category: DiagnosticCategory.Message, key: "Report_errors_in_js_files_8019", message: "Report errors in .js files." },
     };
 }
\ No newline at end of file
diff --git a/src/compiler/diagnosticMessages.generated.json b/src/compiler/diagnosticMessages.generated.json
index 8f1a4da..fd407af 100644
--- a/src/compiler/diagnosticMessages.generated.json
+++ b/src/compiler/diagnosticMessages.generated.json
@@ -40,14 +40,14 @@
   "A_set_accessor_parameter_cannot_have_an_initializer_1052" : "A 'set' accessor parameter cannot have an initializer.",
   "A_set_accessor_cannot_have_rest_parameter_1053" : "A 'set' accessor cannot have rest parameter.",
   "A_get_accessor_cannot_have_parameters_1054" : "A 'get' accessor cannot have parameters.",
-  "Type_0_is_not_a_valid_async_function_return_type_1055" : "Type '{0}' is not a valid async function return type.",
+  "Type_0_is_not_a_valid_async_function_return_type_in_ES5_SlashES3_because_it_does_not_refer_to_a_Prom_1055" : "Type '{0}' is not a valid async function return type in ES5/ES3 because it does not refer to a Promise-compatible constructor value.",
   "Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher_1056" : "Accessors are only available when targeting ECMAScript 5 and higher.",
   "An_async_function_or_method_must_have_a_valid_awaitable_return_type_1057" : "An async function or method must have a valid awaitable return type.",
-  "Operand_for_await_does_not_have_a_valid_callable_then_member_1058" : "Operand for 'await' does not have a valid callable 'then' member.",
-  "Return_expression_in_async_function_does_not_have_a_valid_callable_then_member_1059" : "Return expression in async function does not have a valid callable 'then' member.",
-  "Expression_body_for_async_arrow_function_does_not_have_a_valid_callable_then_member_1060" : "Expression body for async arrow function does not have a valid callable 'then' member.",
+  "The_return_type_of_an_async_function_must_either_be_a_valid_promise_or_must_not_contain_a_callable_t_1058" : "The return type of an async function must either be a valid promise or must not contain a callable 'then' member.",
+  "A_promise_must_have_a_then_method_1059" : "A promise must have a 'then' method.",
+  "The_first_parameter_of_the_then_method_of_a_promise_must_be_a_callback_1060" : "The first parameter of the 'then' method of a promise must be a callback.",
   "Enum_member_must_have_initializer_1061" : "Enum member must have initializer.",
-  "_0_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method_1062" : "{0} is referenced directly or indirectly in the fulfillment callback of its own 'then' method.",
+  "Type_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method_1062" : "Type is referenced directly or indirectly in the fulfillment callback of its own 'then' method.",
   "An_export_assignment_cannot_be_used_in_a_namespace_1063" : "An export assignment cannot be used in a namespace.",
   "The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type_1064" : "The return type of an async function or method must be the global Promise<T> type.",
   "In_ambient_enum_declarations_member_initializer_must_be_constant_expression_1066" : "In ambient enum declarations member initializer must be constant expression.",
@@ -56,7 +56,7 @@
   "_0_modifier_cannot_appear_on_an_index_signature_1071" : "'{0}' modifier cannot appear on an index signature.",
   "A_0_modifier_cannot_be_used_with_an_import_declaration_1079" : "A '{0}' modifier cannot be used with an import declaration.",
   "Invalid_reference_directive_syntax_1084" : "Invalid 'reference' directive syntax.",
-  "Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher_1085" : "Octal literals are not available when targeting ECMAScript 5 and higher.",
+  "Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher_Use_the_syntax_0_1085" : "Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '{0}'.",
   "An_accessor_cannot_be_declared_in_an_ambient_context_1086" : "An accessor cannot be declared in an ambient context.",
   "_0_modifier_cannot_appear_on_a_constructor_declaration_1089" : "'{0}' modifier cannot appear on a constructor declaration.",
   "_0_modifier_cannot_appear_on_a_parameter_1090" : "'{0}' modifier cannot appear on a parameter.",
@@ -72,6 +72,7 @@
   "Invalid_use_of_0_in_strict_mode_1100" : "Invalid use of '{0}' in strict mode.",
   "with_statements_are_not_allowed_in_strict_mode_1101" : "'with' statements are not allowed in strict mode.",
   "delete_cannot_be_called_on_an_identifier_in_strict_mode_1102" : "'delete' cannot be called on an identifier in strict mode.",
+  "A_for_await_of_statement_is_only_allowed_within_an_async_function_or_async_generator_1103" : "A 'for-await-of' statement is only allowed within an async function or async generator.",
   "A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement_1104" : "A 'continue' statement can only be used within an enclosing iteration statement.",
   "A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement_1105" : "A 'break' statement can only be used within an enclosing iteration or switch statement.",
   "Jump_target_cannot_cross_function_boundary_1107" : "Jump target cannot cross function boundary.",
@@ -79,7 +80,7 @@
   "Expression_expected_1109" : "Expression expected.",
   "Type_expected_1110" : "Type expected.",
   "A_default_clause_cannot_appear_more_than_once_in_a_switch_statement_1113" : "A 'default' clause cannot appear more than once in a 'switch' statement.",
-  "Duplicate_label_0_1114" : "Duplicate label '{0}'",
+  "Duplicate_label_0_1114" : "Duplicate label '{0}'.",
   "A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement_1115" : "A 'continue' statement can only jump to a label of an enclosing iteration statement.",
   "A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement_1116" : "A 'break' statement can only jump to a label of an enclosing statement.",
   "An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode_1117" : "An object literal cannot have multiple properties with the same name in strict mode.",
@@ -111,9 +112,9 @@
   "Declaration_expected_1146" : "Declaration expected.",
   "Import_declarations_in_a_namespace_cannot_reference_a_module_1147" : "Import declarations in a namespace cannot reference a module.",
   "Cannot_use_imports_exports_or_module_augmentations_when_module_is_none_1148" : "Cannot use imports, exports, or module augmentations when '--module' is 'none'.",
-  "File_name_0_differs_from_already_included_file_name_1_only_in_casing_1149" : "File name '{0}' differs from already included file name '{1}' only in casing",
+  "File_name_0_differs_from_already_included_file_name_1_only_in_casing_1149" : "File name '{0}' differs from already included file name '{1}' only in casing.",
   "new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead_1150" : "'new T[]' cannot be used to create an array. Use 'new Array<T>()' instead.",
-  "const_declarations_must_be_initialized_1155" : "'const' declarations must be initialized",
+  "const_declarations_must_be_initialized_1155" : "'const' declarations must be initialized.",
   "const_declarations_can_only_be_declared_inside_a_block_1156" : "'const' declarations can only be declared inside a block.",
   "let_declarations_can_only_be_declared_inside_a_block_1157" : "'let' declarations can only be declared inside a block.",
   "Unterminated_template_literal_1160" : "Unterminated template literal.",
@@ -150,7 +151,6 @@
   "Module_0_has_no_default_export_1192" : "Module '{0}' has no default export.",
   "An_export_declaration_cannot_have_modifiers_1193" : "An export declaration cannot have modifiers.",
   "Export_declarations_are_not_permitted_in_a_namespace_1194" : "Export declarations are not permitted in a namespace.",
-  "Catch_clause_variable_name_must_be_an_identifier_1195" : "Catch clause variable name must be an identifier.",
   "Catch_clause_variable_cannot_have_a_type_annotation_1196" : "Catch clause variable cannot have a type annotation.",
   "Catch_clause_variable_cannot_have_an_initializer_1197" : "Catch clause variable cannot have an initializer.",
   "An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive_1198" : "An extended Unicode escape value must be between 0x0 and 0x10FFFF inclusive.",
@@ -158,16 +158,18 @@
   "Line_terminator_not_permitted_before_arrow_1200" : "Line terminator not permitted before arrow.",
   "Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asteri_1202" : "Import assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'import * as ns from \"mod\"', 'import {a} from \"mod\"', 'import d from \"mod\"', or another module format instead.",
   "Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_defaul_1203" : "Export assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'export default' or another module format instead.",
+  "Cannot_re_export_a_type_when_the_isolatedModules_flag_is_provided_1205" : "Cannot re-export a type when the '--isolatedModules' flag is provided.",
   "Decorators_are_not_valid_here_1206" : "Decorators are not valid here.",
   "Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name_1207" : "Decorators cannot be applied to multiple get/set accessors of the same name.",
   "Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided_1208" : "Cannot compile namespaces when the '--isolatedModules' flag is provided.",
   "Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided_1209" : "Ambient const enums are not allowed when the '--isolatedModules' flag is provided.",
   "Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode_1210" : "Invalid use of '{0}'. Class definitions are automatically in strict mode.",
-  "A_class_declaration_without_the_default_modifier_must_have_a_name_1211" : "A class declaration without the 'default' modifier must have a name",
-  "Identifier_expected_0_is_a_reserved_word_in_strict_mode_1212" : "Identifier expected. '{0}' is a reserved word in strict mode",
+  "A_class_declaration_without_the_default_modifier_must_have_a_name_1211" : "A class declaration without the 'default' modifier must have a name.",
+  "Identifier_expected_0_is_a_reserved_word_in_strict_mode_1212" : "Identifier expected. '{0}' is a reserved word in strict mode.",
   "Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_stric_1213" : "Identifier expected. '{0}' is a reserved word in strict mode. Class definitions are automatically in strict mode.",
   "Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode_1214" : "Identifier expected. '{0}' is a reserved word in strict mode. Modules are automatically in strict mode.",
   "Invalid_use_of_0_Modules_are_automatically_in_strict_mode_1215" : "Invalid use of '{0}'. Modules are automatically in strict mode.",
+  "Identifier_expected_esModule_is_reserved_as_an_exported_marker_when_transforming_ECMAScript_modules_1216" : "Identifier expected. '__esModule' is reserved as an exported marker when transforming ECMAScript modules.",
   "Export_assignment_is_not_supported_when_module_flag_is_system_1218" : "Export assignment is not supported when '--module' flag is 'system'.",
   "Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_t_1219" : "Experimental support for decorators is a feature that is subject to change in a future release. Set the 'experimentalDecorators' option to remove this warning.",
   "Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher_1220" : "Generators are only available when targeting ECMAScript 2015 or higher.",
@@ -213,6 +215,17 @@
   "Global_module_exports_may_only_appear_in_declaration_files_1315" : "Global module exports may only appear in declaration files.",
   "Global_module_exports_may_only_appear_at_top_level_1316" : "Global module exports may only appear at top level.",
   "A_parameter_property_cannot_be_declared_using_a_rest_parameter_1317" : "A parameter property cannot be declared using a rest parameter.",
+  "An_abstract_accessor_cannot_have_an_implementation_1318" : "An abstract accessor cannot have an implementation.",
+  "A_default_export_can_only_be_used_in_an_ECMAScript_style_module_1319" : "A default export can only be used in an ECMAScript-style module.",
+  "Type_of_await_operand_must_either_be_a_valid_promise_or_must_not_contain_a_callable_then_member_1320" : "Type of 'await' operand must either be a valid promise or must not contain a callable 'then' member.",
+  "Type_of_yield_operand_in_an_async_generator_must_either_be_a_valid_promise_or_must_not_contain_a_cal_1321" : "Type of 'yield' operand in an async generator must either be a valid promise or must not contain a callable 'then' member.",
+  "Type_of_iterated_elements_of_a_yield_Asterisk_operand_must_either_be_a_valid_promise_or_must_not_con_1322" : "Type of iterated elements of a 'yield*' operand must either be a valid promise or must not contain a callable 'then' member.",
+  "Dynamic_import_cannot_be_used_when_targeting_ECMAScript_2015_modules_1323" : "Dynamic import cannot be used when targeting ECMAScript 2015 modules.",
+  "Dynamic_import_must_have_one_specifier_as_an_argument_1324" : "Dynamic import must have one specifier as an argument.",
+  "Specifier_of_dynamic_import_cannot_be_spread_element_1325" : "Specifier of dynamic import cannot be spread element.",
+  "Dynamic_import_cannot_have_type_arguments_1326" : "Dynamic import cannot have type arguments",
+  "String_literal_with_double_quotes_expected_1327" : "String literal with double quotes expected.",
+  "Property_value_can_only_be_string_literal_numeric_literal_true_false_null_object_literal_or_array_li_1328" : "Property value can only be string literal, numeric literal, 'true', 'false', 'null', object literal or array literal.",
   "Duplicate_identifier_0_2300" : "Duplicate identifier '{0}'.",
   "Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor_2301" : "Initializer of instance member variable '{0}' cannot reference identifier '{1}' declared in the constructor.",
   "Static_members_cannot_reference_class_type_parameters_2302" : "Static members cannot reference class type parameters.",
@@ -256,9 +269,10 @@
   "Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword_2340" : "Only public and protected methods of the base class are accessible via the 'super' keyword.",
   "Property_0_is_private_and_only_accessible_within_class_1_2341" : "Property '{0}' is private and only accessible within class '{1}'.",
   "An_index_expression_argument_must_be_of_type_string_number_symbol_or_any_2342" : "An index expression argument must be of type 'string', 'number', 'symbol', or 'any'.",
+  "This_syntax_requires_an_imported_helper_named_1_but_module_0_has_no_exported_member_1_2343" : "This syntax requires an imported helper named '{1}', but module '{0}' has no exported member '{1}'.",
   "Type_0_does_not_satisfy_the_constraint_1_2344" : "Type '{0}' does not satisfy the constraint '{1}'.",
   "Argument_of_type_0_is_not_assignable_to_parameter_of_type_1_2345" : "Argument of type '{0}' is not assignable to parameter of type '{1}'.",
-  "Supplied_parameters_do_not_match_any_signature_of_call_target_2346" : "Supplied parameters do not match any signature of call target.",
+  "Call_target_does_not_contain_any_signatures_2346" : "Call target does not contain any signatures.",
   "Untyped_function_calls_may_not_accept_type_arguments_2347" : "Untyped function calls may not accept type arguments.",
   "Value_of_type_0_is_not_callable_Did_you_mean_to_include_new_2348" : "Value of type '{0}' is not callable. Did you mean to include 'new'?",
   "Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatur_2349" : "Cannot invoke an expression whose type lacks a call signature. Type '{0}' has no compatible call signatures.",
@@ -266,19 +280,20 @@
   "Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature_2351" : "Cannot use 'new' with an expression whose type lacks a call or construct signature.",
   "Type_0_cannot_be_converted_to_type_1_2352" : "Type '{0}' cannot be converted to type '{1}'.",
   "Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1_2353" : "Object literal may only specify known properties, and '{0}' does not exist in type '{1}'.",
+  "This_syntax_requires_an_imported_helper_but_module_0_cannot_be_found_2354" : "This syntax requires an imported helper but module '{0}' cannot be found.",
   "A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value_2355" : "A function whose declared type is neither 'void' nor 'any' must return a value.",
   "An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type_2356" : "An arithmetic operand must be of type 'any', 'number' or an enum type.",
-  "The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer_2357" : "The operand of an increment or decrement operator must be a variable, property or indexer.",
+  "The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_or_a_property_access_2357" : "The operand of an increment or decrement operator must be a variable or a property access.",
   "The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_paramete_2358" : "The left-hand side of an 'instanceof' expression must be of type 'any', an object type or a type parameter.",
   "The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_F_2359" : "The right-hand side of an 'instanceof' expression must be of type 'any' or of a type assignable to the 'Function' interface type.",
   "The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol_2360" : "The left-hand side of an 'in' expression must be of type 'any', 'string', 'number', or 'symbol'.",
-  "The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter_2361" : "The right-hand side of an 'in' expression must be of type 'any', an object type or a type parameter",
+  "The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter_2361" : "The right-hand side of an 'in' expression must be of type 'any', an object type or a type parameter.",
   "The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type_2362" : "The left-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type.",
   "The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type_2363" : "The right-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type.",
-  "Invalid_left_hand_side_of_assignment_expression_2364" : "Invalid left-hand side of assignment expression.",
+  "The_left_hand_side_of_an_assignment_expression_must_be_a_variable_or_a_property_access_2364" : "The left-hand side of an assignment expression must be a variable or a property access.",
   "Operator_0_cannot_be_applied_to_types_1_and_2_2365" : "Operator '{0}' cannot be applied to types '{1}' and '{2}'.",
   "Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined_2366" : "Function lacks ending return statement and return type does not include 'undefined'.",
-  "Type_parameter_name_cannot_be_0_2368" : "Type parameter name cannot be '{0}'",
+  "Type_parameter_name_cannot_be_0_2368" : "Type parameter name cannot be '{0}'.",
   "A_parameter_property_is_only_allowed_in_a_constructor_implementation_2369" : "A parameter property is only allowed in a constructor implementation.",
   "A_rest_parameter_must_be_of_an_array_type_2370" : "A rest parameter must be of an array type.",
   "A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation_2371" : "A parameter initializer is only allowed in a function or constructor implementation.",
@@ -315,15 +330,15 @@
   "Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_t_2403" : "Subsequent variable declarations must have the same type.  Variable '{0}' must be of type '{1}', but here has type '{2}'.",
   "The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation_2404" : "The left-hand side of a 'for...in' statement cannot use a type annotation.",
   "The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any_2405" : "The left-hand side of a 'for...in' statement must be of type 'string' or 'any'.",
-  "Invalid_left_hand_side_in_for_in_statement_2406" : "Invalid left-hand side in 'for...in' statement.",
+  "The_left_hand_side_of_a_for_in_statement_must_be_a_variable_or_a_property_access_2406" : "The left-hand side of a 'for...in' statement must be a variable or a property access.",
   "The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter_2407" : "The right-hand side of a 'for...in' statement must be of type 'any', an object type or a type parameter.",
   "Setters_cannot_return_a_value_2408" : "Setters cannot return a value.",
-  "Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class_2409" : "Return type of constructor signature must be assignable to the instance type of the class",
+  "Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class_2409" : "Return type of constructor signature must be assignable to the instance type of the class.",
   "The_with_statement_is_not_supported_All_symbols_in_a_with_block_will_have_type_any_2410" : "The 'with' statement is not supported. All symbols in a 'with' block will have type 'any'.",
   "Property_0_of_type_1_is_not_assignable_to_string_index_type_2_2411" : "Property '{0}' of type '{1}' is not assignable to string index type '{2}'.",
   "Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2_2412" : "Property '{0}' of type '{1}' is not assignable to numeric index type '{2}'.",
   "Numeric_index_type_0_is_not_assignable_to_string_index_type_1_2413" : "Numeric index type '{0}' is not assignable to string index type '{1}'.",
-  "Class_name_cannot_be_0_2414" : "Class name cannot be '{0}'",
+  "Class_name_cannot_be_0_2414" : "Class name cannot be '{0}'.",
   "Class_0_incorrectly_extends_base_class_1_2415" : "Class '{0}' incorrectly extends base class '{1}'.",
   "Class_static_side_0_incorrectly_extends_base_class_static_side_1_2417" : "Class static side '{0}' incorrectly extends base class static side '{1}'.",
   "Class_0_incorrectly_implements_interface_1_2420" : "Class '{0}' incorrectly implements interface '{1}'.",
@@ -332,19 +347,19 @@
   "Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_proper_2424" : "Class '{0}' defines instance member function '{1}', but extended class '{2}' defines it as instance member property.",
   "Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_functi_2425" : "Class '{0}' defines instance member property '{1}', but extended class '{2}' defines it as instance member function.",
   "Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_functi_2426" : "Class '{0}' defines instance member accessor '{1}', but extended class '{2}' defines it as instance member function.",
-  "Interface_name_cannot_be_0_2427" : "Interface name cannot be '{0}'",
+  "Interface_name_cannot_be_0_2427" : "Interface name cannot be '{0}'.",
   "All_declarations_of_0_must_have_identical_type_parameters_2428" : "All declarations of '{0}' must have identical type parameters.",
   "Interface_0_incorrectly_extends_interface_1_2430" : "Interface '{0}' incorrectly extends interface '{1}'.",
-  "Enum_name_cannot_be_0_2431" : "Enum name cannot be '{0}'",
+  "Enum_name_cannot_be_0_2431" : "Enum name cannot be '{0}'.",
   "In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enu_2432" : "In an enum with multiple declarations, only one declaration can omit an initializer for its first enum element.",
-  "A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merg_2433" : "A namespace declaration cannot be in a different file from a class or function with which it is merged",
-  "A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged_2434" : "A namespace declaration cannot be located prior to a class or function with which it is merged",
+  "A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merg_2433" : "A namespace declaration cannot be in a different file from a class or function with which it is merged.",
+  "A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged_2434" : "A namespace declaration cannot be located prior to a class or function with which it is merged.",
   "Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces_2435" : "Ambient modules cannot be nested in other modules or namespaces.",
   "Ambient_module_declaration_cannot_specify_relative_module_name_2436" : "Ambient module declaration cannot specify relative module name.",
-  "Module_0_is_hidden_by_a_local_declaration_with_the_same_name_2437" : "Module '{0}' is hidden by a local declaration with the same name",
-  "Import_name_cannot_be_0_2438" : "Import name cannot be '{0}'",
+  "Module_0_is_hidden_by_a_local_declaration_with_the_same_name_2437" : "Module '{0}' is hidden by a local declaration with the same name.",
+  "Import_name_cannot_be_0_2438" : "Import name cannot be '{0}'.",
   "Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relati_2439" : "Import or export declaration in an ambient module declaration cannot reference module through relative module name.",
-  "Import_declaration_conflicts_with_local_declaration_of_0_2440" : "Import declaration conflicts with local declaration of '{0}'",
+  "Import_declaration_conflicts_with_local_declaration_of_0_2440" : "Import declaration conflicts with local declaration of '{0}'.",
   "Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_2441" : "Duplicate identifier '{0}'. Compiler reserves name '{1}' in top level scope of a module.",
   "Types_have_separate_declarations_of_a_private_property_0_2442" : "Types have separate declarations of a private property '{0}'.",
   "Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2_2443" : "Property '{0}' is protected but type '{1}' is not a class derived from '{2}'.",
@@ -353,20 +368,20 @@
   "Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1_2446" : "Property '{0}' is protected and only accessible through an instance of class '{1}'.",
   "The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead_2447" : "The '{0}' operator is not allowed for boolean types. Consider using '{1}' instead.",
   "Block_scoped_variable_0_used_before_its_declaration_2448" : "Block-scoped variable '{0}' used before its declaration.",
-  "The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property_2449" : "The operand of an increment or decrement operator cannot be a constant or a read-only property.",
-  "Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property_2450" : "Left-hand side of assignment expression cannot be a constant or a read-only property.",
+  "Class_0_used_before_its_declaration_2449" : "Class '{0}' used before its declaration.",
+  "Enum_0_used_before_its_declaration_2450" : "Enum '{0}' used before its declaration.",
   "Cannot_redeclare_block_scoped_variable_0_2451" : "Cannot redeclare block-scoped variable '{0}'.",
   "An_enum_member_cannot_have_a_numeric_name_2452" : "An enum member cannot have a numeric name.",
   "The_type_argument_for_type_parameter_0_cannot_be_inferred_from_the_usage_Consider_specifying_the_typ_2453" : "The type argument for type parameter '{0}' cannot be inferred from the usage. Consider specifying the type arguments explicitly.",
   "Variable_0_is_used_before_being_assigned_2454" : "Variable '{0}' is used before being assigned.",
   "Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0_2455" : "Type argument candidate '{1}' is not a valid type argument because it is not a supertype of candidate '{0}'.",
   "Type_alias_0_circularly_references_itself_2456" : "Type alias '{0}' circularly references itself.",
-  "Type_alias_name_cannot_be_0_2457" : "Type alias name cannot be '{0}'",
+  "Type_alias_name_cannot_be_0_2457" : "Type alias name cannot be '{0}'.",
   "An_AMD_module_cannot_have_multiple_name_assignments_2458" : "An AMD module cannot have multiple name assignments.",
   "Type_0_has_no_property_1_and_no_string_index_signature_2459" : "Type '{0}' has no property '{1}' and no string index signature.",
   "Type_0_has_no_property_1_2460" : "Type '{0}' has no property '{1}'.",
   "Type_0_is_not_an_array_type_2461" : "Type '{0}' is not an array type.",
-  "A_rest_element_must_be_last_in_an_array_destructuring_pattern_2462" : "A rest element must be last in an array destructuring pattern",
+  "A_rest_element_must_be_last_in_a_destructuring_pattern_2462" : "A rest element must be last in a destructuring pattern.",
   "A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature_2463" : "A binding pattern parameter cannot be optional in an implementation signature.",
   "A_computed_property_name_must_be_of_type_string_number_symbol_or_any_2464" : "A computed property name must be of type 'string', 'number', 'symbol', or 'any'.",
   "this_cannot_be_referenced_in_a_computed_property_name_2465" : "'this' cannot be referenced in a computed property name.",
@@ -387,15 +402,13 @@
   "let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations_2480" : "'let' is not allowed to be used as a name in 'let' or 'const' declarations.",
   "Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1_2481" : "Cannot initialize outer scoped variable '{0}' in the same scope as block scoped declaration '{1}'.",
   "The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation_2483" : "The left-hand side of a 'for...of' statement cannot use a type annotation.",
-  "Export_declaration_conflicts_with_exported_declaration_of_0_2484" : "Export declaration conflicts with exported declaration of '{0}'",
-  "The_left_hand_side_of_a_for_of_statement_cannot_be_a_constant_or_a_read_only_property_2485" : "The left-hand side of a 'for...of' statement cannot be a constant or a read-only property.",
-  "The_left_hand_side_of_a_for_in_statement_cannot_be_a_constant_or_a_read_only_property_2486" : "The left-hand side of a 'for...in' statement cannot be a constant or a read-only property.",
-  "Invalid_left_hand_side_in_for_of_statement_2487" : "Invalid left-hand side in 'for...of' statement.",
+  "Export_declaration_conflicts_with_exported_declaration_of_0_2484" : "Export declaration conflicts with exported declaration of '{0}'.",
+  "The_left_hand_side_of_a_for_of_statement_must_be_a_variable_or_a_property_access_2487" : "The left-hand side of a 'for...of' statement must be a variable or a property access.",
   "Type_must_have_a_Symbol_iterator_method_that_returns_an_iterator_2488" : "Type must have a '[Symbol.iterator]()' method that returns an iterator.",
   "An_iterator_must_have_a_next_method_2489" : "An iterator must have a 'next()' method.",
   "The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property_2490" : "The type returned by the 'next()' method of an iterator must have a 'value' property.",
   "The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern_2491" : "The left-hand side of a 'for...in' statement cannot be a destructuring pattern.",
-  "Cannot_redeclare_identifier_0_in_catch_clause_2492" : "Cannot redeclare identifier '{0}' in catch clause",
+  "Cannot_redeclare_identifier_0_in_catch_clause_2492" : "Cannot redeclare identifier '{0}' in catch clause.",
   "Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2_2493" : "Tuple type '{0}' with length '{1}' cannot be assigned to tuple with length '{2}'.",
   "Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher_2494" : "Using a string in a 'for...of' statement is only supported in ECMAScript 5 and higher.",
   "Type_0_is_not_an_array_type_or_a_string_type_2495" : "Type '{0}' is not an array type or a string type.",
@@ -407,6 +420,7 @@
   "A_rest_element_cannot_contain_a_binding_pattern_2501" : "A rest element cannot contain a binding pattern.",
   "_0_is_referenced_directly_or_indirectly_in_its_own_type_annotation_2502" : "'{0}' is referenced directly or indirectly in its own type annotation.",
   "Cannot_find_namespace_0_2503" : "Cannot find namespace '{0}'.",
+  "Type_must_have_a_Symbol_asyncIterator_method_that_returns_an_async_iterator_2504" : "Type must have a '[Symbol.asyncIterator]()' method that returns an async iterator.",
   "A_generator_cannot_have_a_void_type_annotation_2505" : "A generator cannot have a 'void' type annotation.",
   "_0_is_referenced_directly_or_indirectly_in_its_own_base_expression_2506" : "'{0}' is referenced directly or indirectly in its own base expression.",
   "Type_0_is_not_a_constructor_function_type_2507" : "Type '{0}' is not a constructor function type.",
@@ -421,6 +435,7 @@
   "All_declarations_of_an_abstract_method_must_be_consecutive_2516" : "All declarations of an abstract method must be consecutive.",
   "Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type_2517" : "Cannot assign an abstract constructor type to a non-abstract constructor type.",
   "A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard_2518" : "A 'this'-based type guard is not compatible with a parameter-based type guard.",
+  "An_async_iterator_must_have_a_next_method_2519" : "An async iterator must have a 'next()' method.",
   "Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions_2520" : "Duplicate identifier '{0}'. Compiler uses declaration '{1}' to support async functions.",
   "Expression_resolves_to_variable_declaration_0_that_compiler_uses_to_support_async_functions_2521" : "Expression resolves to variable declaration '{0}' that compiler uses to support async functions.",
   "The_arguments_object_cannot_be_referenced_in_an_async_function_or_method_in_ES3_and_ES5_Consider_usi_2522" : "The 'arguments' object cannot be referenced in an async function or method in ES3 and ES5. Consider using a standard function or method.",
@@ -437,29 +452,55 @@
   "Object_is_possibly_null_or_undefined_2533" : "Object is possibly 'null' or 'undefined'.",
   "A_function_returning_never_cannot_have_a_reachable_end_point_2534" : "A function returning 'never' cannot have a reachable end point.",
   "Enum_type_0_has_members_with_initializers_that_are_not_literals_2535" : "Enum type '{0}' has members with initializers that are not literals.",
+  "Type_0_cannot_be_used_to_index_type_1_2536" : "Type '{0}' cannot be used to index type '{1}'.",
+  "Type_0_has_no_matching_index_signature_for_type_1_2537" : "Type '{0}' has no matching index signature for type '{1}'.",
+  "Type_0_cannot_be_used_as_an_index_type_2538" : "Type '{0}' cannot be used as an index type.",
+  "Cannot_assign_to_0_because_it_is_not_a_variable_2539" : "Cannot assign to '{0}' because it is not a variable.",
+  "Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property_2540" : "Cannot assign to '{0}' because it is a constant or a read-only property.",
+  "The_target_of_an_assignment_must_be_a_variable_or_a_property_access_2541" : "The target of an assignment must be a variable or a property access.",
+  "Index_signature_in_type_0_only_permits_reading_2542" : "Index signature in type '{0}' only permits reading.",
+  "Duplicate_identifier_newTarget_Compiler_uses_variable_declaration_newTarget_to_capture_new_target_me_2543" : "Duplicate identifier '_newTarget'. Compiler uses variable declaration '_newTarget' to capture 'new.target' meta-property reference.",
+  "Expression_resolves_to_variable_declaration_newTarget_that_compiler_uses_to_capture_new_target_meta__2544" : "Expression resolves to variable declaration '_newTarget' that compiler uses to capture 'new.target' meta-property reference.",
+  "A_mixin_class_must_have_a_constructor_with_a_single_rest_parameter_of_type_any_2545" : "A mixin class must have a constructor with a single rest parameter of type 'any[]'.",
+  "Property_0_has_conflicting_declarations_and_is_inaccessible_in_type_1_2546" : "Property '{0}' has conflicting declarations and is inaccessible in type '{1}'.",
+  "The_type_returned_by_the_next_method_of_an_async_iterator_must_be_a_promise_for_a_type_with_a_value__2547" : "The type returned by the 'next()' method of an async iterator must be a promise for a type with a 'value' property.",
+  "Type_0_is_not_an_array_type_or_does_not_have_a_Symbol_iterator_method_that_returns_an_iterator_2548" : "Type '{0}' is not an array type or does not have a '[Symbol.iterator]()' method that returns an iterator.",
+  "Type_0_is_not_an_array_type_or_a_string_type_or_does_not_have_a_Symbol_iterator_method_that_returns__2549" : "Type '{0}' is not an array type or a string type or does not have a '[Symbol.iterator]()' method that returns an iterator.",
+  "Generic_type_instantiation_is_excessively_deep_and_possibly_infinite_2550" : "Generic type instantiation is excessively deep and possibly infinite.",
+  "Property_0_does_not_exist_on_type_1_Did_you_mean_2_2551" : "Property '{0}' does not exist on type '{1}'. Did you mean '{2}'?",
+  "Cannot_find_name_0_Did_you_mean_1_2552" : "Cannot find name '{0}'. Did you mean '{1}'?",
+  "Computed_values_are_not_permitted_in_an_enum_with_string_valued_members_2553" : "Computed values are not permitted in an enum with string valued members.",
+  "Expected_0_arguments_but_got_1_2554" : "Expected {0} arguments, but got {1}.",
+  "Expected_at_least_0_arguments_but_got_1_2555" : "Expected at least {0} arguments, but got {1}.",
+  "Expected_0_arguments_but_got_a_minimum_of_1_2556" : "Expected {0} arguments, but got a minimum of {1}.",
+  "Expected_at_least_0_arguments_but_got_a_minimum_of_1_2557" : "Expected at least {0} arguments, but got a minimum of {1}.",
+  "Expected_0_type_arguments_but_got_1_2558" : "Expected {0} type arguments, but got {1}.",
+  "Type_0_has_no_properties_in_common_with_type_1_2559" : "Type '{0}' has no properties in common with type '{1}'.",
   "JSX_element_attributes_type_0_may_not_be_a_union_type_2600" : "JSX element attributes type '{0}' may not be a union type.",
   "The_return_type_of_a_JSX_element_constructor_must_return_an_object_type_2601" : "The return type of a JSX element constructor must return an object type.",
   "JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist_2602" : "JSX element implicitly has type 'any' because the global type 'JSX.Element' does not exist.",
-  "Property_0_in_type_1_is_not_assignable_to_type_2_2603" : "Property '{0}' in type '{1}' is not assignable to type '{2}'",
+  "Property_0_in_type_1_is_not_assignable_to_type_2_2603" : "Property '{0}' in type '{1}' is not assignable to type '{2}'.",
   "JSX_element_type_0_does_not_have_any_construct_or_call_signatures_2604" : "JSX element type '{0}' does not have any construct or call signatures.",
   "JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements_2605" : "JSX element type '{0}' is not a constructor function for JSX elements.",
   "Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property_2606" : "Property '{0}' of JSX spread attribute is not assignable to target property.",
-  "JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property_2607" : "JSX element class does not support attributes because it does not have a '{0}' property",
-  "The_global_type_JSX_0_may_not_have_more_than_one_property_2608" : "The global type 'JSX.{0}' may not have more than one property",
-  "Cannot_emit_namespaced_JSX_elements_in_React_2650" : "Cannot emit namespaced JSX elements in React",
+  "JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property_2607" : "JSX element class does not support attributes because it does not have a '{0}' property.",
+  "The_global_type_JSX_0_may_not_have_more_than_one_property_2608" : "The global type 'JSX.{0}' may not have more than one property.",
+  "JSX_spread_child_must_be_an_array_type_2609" : "JSX spread child must be an array type.",
+  "Cannot_augment_module_0_with_value_exports_because_it_resolves_to_a_non_module_entity_2649" : "Cannot augment module '{0}' with value exports because it resolves to a non-module entity.",
   "A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_memb_2651" : "A member initializer in a enum declaration cannot reference members declared after it, including members defined in other enums.",
   "Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_d_2652" : "Merged declaration '{0}' cannot include a default export declaration. Consider adding a separate 'export default {0}' declaration instead.",
   "Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1_2653" : "Non-abstract class expression does not implement inherited abstract member '{0}' from class '{1}'.",
   "Exported_external_package_typings_file_cannot_contain_tripleslash_references_Please_contact_the_pack_2654" : "Exported external package typings file cannot contain tripleslash references. Please contact the package author to update the package definition.",
   "Exported_external_package_typings_file_0_is_not_a_module_Please_contact_the_package_author_to_update_2656" : "Exported external package typings file '{0}' is not a module. Please contact the package author to update the package definition.",
-  "JSX_expressions_must_have_one_parent_element_2657" : "JSX expressions must have one parent element",
-  "Type_0_provides_no_match_for_the_signature_1_2658" : "Type '{0}' provides no match for the signature '{1}'",
+  "JSX_expressions_must_have_one_parent_element_2657" : "JSX expressions must have one parent element.",
+  "Type_0_provides_no_match_for_the_signature_1_2658" : "Type '{0}' provides no match for the signature '{1}'.",
   "super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_highe_2659" : "'super' is only allowed in members of object literal expressions when option 'target' is 'ES2015' or higher.",
   "super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions_2660" : "'super' can only be referenced in members of derived classes or object literal expressions.",
   "Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module_2661" : "Cannot export '{0}'. Only local declarations can be exported from a module.",
   "Cannot_find_name_0_Did_you_mean_the_static_member_1_0_2662" : "Cannot find name '{0}'. Did you mean the static member '{1}.{0}'?",
   "Cannot_find_name_0_Did_you_mean_the_instance_member_this_0_2663" : "Cannot find name '{0}'. Did you mean the instance member 'this.{0}'?",
   "Invalid_module_name_in_augmentation_module_0_cannot_be_found_2664" : "Invalid module name in augmentation, module '{0}' cannot be found.",
+  "Invalid_module_name_in_augmentation_Module_0_resolves_to_an_untyped_module_at_1_which_cannot_be_augm_2665" : "Invalid module name in augmentation. Module '{0}' resolves to an untyped module at '{1}', which cannot be augmented.",
   "Exports_and_export_assignments_are_not_permitted_in_module_augmentations_2666" : "Exports and export assignments are not permitted in module augmentations.",
   "Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_mod_2667" : "Imports are not permitted in module augmentations. Consider moving them to the enclosing external module.",
   "export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always__2668" : "'export' modifier cannot be applied to ambient modules and module augmentations since they are always visible.",
@@ -480,17 +521,32 @@
   "this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_2683" : "'this' implicitly has type 'any' because it does not have a type annotation.",
   "The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1_2684" : "The 'this' context of type '{0}' is not assignable to method's 'this' of type '{1}'.",
   "The_this_types_of_each_signature_are_incompatible_2685" : "The 'this' types of each signature are incompatible.",
-  "Identifier_0_must_be_imported_from_a_module_2686" : "Identifier '{0}' must be imported from a module",
+  "_0_refers_to_a_UMD_global_but_the_current_file_is_a_module_Consider_adding_an_import_instead_2686" : "'{0}' refers to a UMD global, but the current file is a module. Consider adding an import instead.",
   "All_declarations_of_0_must_have_identical_modifiers_2687" : "All declarations of '{0}' must have identical modifiers.",
   "Cannot_find_type_definition_file_for_0_2688" : "Cannot find type definition file for '{0}'.",
   "Cannot_extend_an_interface_0_Did_you_mean_implements_2689" : "Cannot extend an interface '{0}'. Did you mean 'implements'?",
-  "A_class_must_be_declared_after_its_base_class_2690" : "A class must be declared after its base class.",
   "An_import_path_cannot_end_with_a_0_extension_Consider_importing_1_instead_2691" : "An import path cannot end with a '{0}' extension. Consider importing '{1}' instead.",
   "_0_is_a_primitive_but_1_is_a_wrapper_object_Prefer_using_0_when_possible_2692" : "'{0}' is a primitive, but '{1}' is a wrapper object. Prefer using '{0}' when possible.",
   "_0_only_refers_to_a_type_but_is_being_used_as_a_value_here_2693" : "'{0}' only refers to a type, but is being used as a value here.",
   "Namespace_0_has_no_exported_member_1_2694" : "Namespace '{0}' has no exported member '{1}'.",
   "Left_side_of_comma_operator_is_unused_and_has_no_side_effects_2695" : "Left side of comma operator is unused and has no side effects.",
   "The_Object_type_is_assignable_to_very_few_other_types_Did_you_mean_to_use_the_any_type_instead_2696" : "The 'Object' type is assignable to very few other types. Did you mean to use the 'any' type instead?",
+  "An_async_function_or_method_must_return_a_Promise_Make_sure_you_have_a_declaration_for_Promise_or_in_2697" : "An async function or method must return a 'Promise'. Make sure you have a declaration for 'Promise' or include 'ES2015' in your `--lib` option.",
+  "Spread_types_may_only_be_created_from_object_types_2698" : "Spread types may only be created from object types.",
+  "Static_property_0_conflicts_with_built_in_property_Function_0_of_constructor_function_1_2699" : "Static property '{0}' conflicts with built-in property 'Function.{0}' of constructor function '{1}'.",
+  "Rest_types_may_only_be_created_from_object_types_2700" : "Rest types may only be created from object types.",
+  "The_target_of_an_object_rest_assignment_must_be_a_variable_or_a_property_access_2701" : "The target of an object rest assignment must be a variable or a property access.",
+  "_0_only_refers_to_a_type_but_is_being_used_as_a_namespace_here_2702" : "'{0}' only refers to a type, but is being used as a namespace here.",
+  "The_operand_of_a_delete_operator_must_be_a_property_reference_2703" : "The operand of a delete operator must be a property reference.",
+  "The_operand_of_a_delete_operator_cannot_be_a_read_only_property_2704" : "The operand of a delete operator cannot be a read-only property.",
+  "An_async_function_or_method_in_ES5_SlashES3_requires_the_Promise_constructor_Make_sure_you_have_a_de_2705" : "An async function or method in ES5/ES3 requires the 'Promise' constructor.  Make sure you have a declaration for the 'Promise' constructor or include 'ES2015' in your `--lib` option.",
+  "Required_type_parameters_may_not_follow_optional_type_parameters_2706" : "Required type parameters may not follow optional type parameters.",
+  "Generic_type_0_requires_between_1_and_2_type_arguments_2707" : "Generic type '{0}' requires between {1} and {2} type arguments.",
+  "Cannot_use_namespace_0_as_a_value_2708" : "Cannot use namespace '{0}' as a value.",
+  "Cannot_use_namespace_0_as_a_type_2709" : "Cannot use namespace '{0}' as a type.",
+  "_0_are_specified_twice_The_attribute_named_0_will_be_overwritten_2710" : "'{0}' are specified twice. The attribute named '{0}' will be overwritten.",
+  "A_dynamic_import_call_returns_a_Promise_Make_sure_you_have_a_declaration_for_Promise_or_include_ES20_2711" : "A dynamic import call returns a 'Promise'. Make sure you have a declaration for 'Promise' or include 'ES2015' in your `--lib` option.",
+  "A_dynamic_import_call_in_ES5_SlashES3_requires_the_Promise_constructor_Make_sure_you_have_a_declarat_2712" : "A dynamic import call in ES5/ES3 requires the 'Promise' constructor.  Make sure you have a declaration for the 'Promise' constructor or include 'ES2015' in your `--lib` option.",
   "Import_declaration_0_is_using_private_name_1_4000" : "Import declaration '{0}' is using private name '{1}'.",
   "Type_parameter_0_of_exported_class_has_or_is_using_private_name_1_4002" : "Type parameter '{0}' of exported class has or is using private name '{1}'.",
   "Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1_4004" : "Type parameter '{0}' of exported interface has or is using private name '{1}'.",
@@ -501,8 +557,8 @@
   "Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1_4014" : "Type parameter '{0}' of method from exported interface has or is using private name '{1}'.",
   "Type_parameter_0_of_exported_function_has_or_is_using_private_name_1_4016" : "Type parameter '{0}' of exported function has or is using private name '{1}'.",
   "Implements_clause_of_exported_class_0_has_or_is_using_private_name_1_4019" : "Implements clause of exported class '{0}' has or is using private name '{1}'.",
-  "Extends_clause_of_exported_class_0_has_or_is_using_private_name_1_4020" : "Extends clause of exported class '{0}' has or is using private name '{1}'.",
-  "Extends_clause_of_exported_interface_0_has_or_is_using_private_name_1_4022" : "Extends clause of exported interface '{0}' has or is using private name '{1}'.",
+  "extends_clause_of_exported_class_0_has_or_is_using_private_name_1_4020" : "'extends' clause of exported class '{0}' has or is using private name '{1}'.",
+  "extends_clause_of_exported_interface_0_has_or_is_using_private_name_1_4022" : "'extends' clause of exported interface '{0}' has or is using private name '{1}'.",
   "Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named_4023" : "Exported variable '{0}' has or is using name '{1}' from external module {2} but cannot be named.",
   "Exported_variable_0_has_or_is_using_name_1_from_private_module_2_4024" : "Exported variable '{0}' has or is using name '{1}' from private module '{2}'.",
   "Exported_variable_0_has_or_is_using_private_name_1_4025" : "Exported variable '{0}' has or is using private name '{1}'.",
@@ -561,17 +617,20 @@
   "Parameter_0_of_exported_function_has_or_is_using_private_name_1_4078" : "Parameter '{0}' of exported function has or is using private name '{1}'.",
   "Exported_type_alias_0_has_or_is_using_private_name_1_4081" : "Exported type alias '{0}' has or is using private name '{1}'.",
   "Default_export_of_the_module_has_or_is_using_private_name_0_4082" : "Default export of the module has or is using private name '{0}'.",
+  "Type_parameter_0_of_exported_type_alias_has_or_is_using_private_name_1_4083" : "Type parameter '{0}' of exported type alias has or is using private name '{1}'.",
   "Conflicting_definitions_for_0_found_at_1_and_2_Consider_installing_a_specific_version_of_this_librar_4090" : "Conflicting definitions for '{0}' found at '{1}' and '{2}'. Consider installing a specific version of this library to resolve the conflict.",
+  "Parameter_0_of_index_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2_4091" : "Parameter '{0}' of index signature from exported interface has or is using name '{1}' from private module '{2}'.",
+  "Parameter_0_of_index_signature_from_exported_interface_has_or_is_using_private_name_1_4092" : "Parameter '{0}' of index signature from exported interface has or is using private name '{1}'.",
+  "Property_0_of_exported_class_expression_may_not_be_private_or_protected_4094" : "Property '{0}' of exported class expression may not be private or protected.",
   "The_current_host_does_not_support_the_0_option_5001" : "The current host does not support the '{0}' option.",
   "Cannot_find_the_common_subdirectory_path_for_the_input_files_5009" : "Cannot find the common subdirectory path for the input files.",
   "File_specification_cannot_end_in_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0_5010" : "File specification cannot end in a recursive directory wildcard ('**'): '{0}'.",
   "File_specification_cannot_contain_multiple_recursive_directory_wildcards_Asterisk_Asterisk_Colon_0_5011" : "File specification cannot contain multiple recursive directory wildcards ('**'): '{0}'.",
-  "Cannot_read_file_0_Colon_1_5012" : "Cannot read file '{0}': {1}",
-  "Unsupported_file_encoding_5013" : "Unsupported file encoding.",
+  "Cannot_read_file_0_Colon_1_5012" : "Cannot read file '{0}': {1}.",
   "Failed_to_parse_file_0_Colon_1_5014" : "Failed to parse file '{0}': {1}.",
   "Unknown_compiler_option_0_5023" : "Unknown compiler option '{0}'.",
   "Compiler_option_0_requires_a_value_of_type_1_5024" : "Compiler option '{0}' requires a value of type {1}.",
-  "Could_not_write_file_0_Colon_1_5033" : "Could not write file '{0}': {1}",
+  "Could_not_write_file_0_Colon_1_5033" : "Could not write file '{0}': {1}.",
   "Option_project_cannot_be_mixed_with_source_files_on_a_command_line_5042" : "Option 'project' cannot be mixed with source files on a command line.",
   "Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES_5047" : "Option 'isolatedModules' can only be used when either option '--module' is provided or option 'target' is 'ES2015' or higher.",
   "Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided_5051" : "Option '{0} can only be used when either option '--inlineSourceMap' or option '--sourceMap' is provided.",
@@ -580,16 +639,17 @@
   "A_tsconfig_json_file_is_already_defined_at_Colon_0_5054" : "A 'tsconfig.json' file is already defined at: '{0}'.",
   "Cannot_write_file_0_because_it_would_overwrite_input_file_5055" : "Cannot write file '{0}' because it would overwrite input file.",
   "Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files_5056" : "Cannot write file '{0}' because it would be overwritten by multiple input files.",
-  "Cannot_find_a_tsconfig_json_file_at_the_specified_directory_Colon_0_5057" : "Cannot find a tsconfig.json file at the specified directory: '{0}'",
-  "The_specified_path_does_not_exist_Colon_0_5058" : "The specified path does not exist: '{0}'",
+  "Cannot_find_a_tsconfig_json_file_at_the_specified_directory_Colon_0_5057" : "Cannot find a tsconfig.json file at the specified directory: '{0}'.",
+  "The_specified_path_does_not_exist_Colon_0_5058" : "The specified path does not exist: '{0}'.",
   "Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier_5059" : "Invalid value for '--reactNamespace'. '{0}' is not a valid identifier.",
   "Option_paths_cannot_be_used_without_specifying_baseUrl_option_5060" : "Option 'paths' cannot be used without specifying '--baseUrl' option.",
-  "Pattern_0_can_have_at_most_one_Asterisk_character_5061" : "Pattern '{0}' can have at most one '*' character",
-  "Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character_5062" : "Substitution '{0}' in pattern '{1}' in can have at most one '*' character",
+  "Pattern_0_can_have_at_most_one_Asterisk_character_5061" : "Pattern '{0}' can have at most one '*' character.",
+  "Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character_5062" : "Substitution '{0}' in pattern '{1}' in can have at most one '*' character.",
   "Substitutions_for_pattern_0_should_be_an_array_5063" : "Substitutions for pattern '{0}' should be an array.",
   "Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2_5064" : "Substitution '{0}' for pattern '{1}' has incorrect type, expected 'string', got '{2}'.",
   "File_specification_cannot_contain_a_parent_directory_that_appears_after_a_recursive_directory_wildca_5065" : "File specification cannot contain a parent directory ('..') that appears after a recursive directory wildcard ('**'): '{0}'.",
   "Substitutions_for_pattern_0_shouldn_t_be_an_empty_array_5066" : "Substitutions for pattern '{0}' shouldn't be an empty array.",
+  "Invalid_value_for_jsxFactory_0_is_not_a_valid_identifier_or_qualified_name_5067" : "Invalid value for 'jsxFactory'. '{0}' is not a valid identifier or qualified-name.",
   "Concatenate_and_emit_output_to_single_file_6001" : "Concatenate and emit output to single file.",
   "Generates_corresponding_d_ts_file_6002" : "Generates corresponding '.d.ts' file.",
   "Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations_6003" : "Specify the location where debugger should locate map files instead of generated locations.",
@@ -602,11 +662,11 @@
   "Do_not_emit_outputs_6010" : "Do not emit outputs.",
   "Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typech_6011" : "Allow default imports from modules with no default export. This does not affect code emit, just typechecking.",
   "Skip_type_checking_of_declaration_files_6012" : "Skip type checking of declaration files.",
-  "Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015_6015" : "Specify ECMAScript target version: 'ES3' (default), 'ES5', or 'ES2015'",
-  "Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015_6016" : "Specify module code generation: 'commonjs', 'amd', 'system', 'umd' or 'es2015'",
+  "Specify_ECMAScript_target_version_Colon_ES3_default_ES5_ES2015_ES2016_ES2017_or_ESNEXT_6015" : "Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', or 'ESNEXT'.",
+  "Specify_module_code_generation_Colon_commonjs_amd_system_umd_es2015_or_ESNext_6016" : "Specify module code generation: 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'.",
   "Print_this_message_6017" : "Print this message.",
   "Print_the_compiler_s_version_6019" : "Print the compiler's version.",
-  "Compile_the_project_in_the_given_directory_6020" : "Compile the project in the given directory.",
+  "Compile_the_project_given_the_path_to_its_configuration_file_or_to_a_folder_with_a_tsconfig_json_6020" : "Compile the project given the path to its configuration file, or to a folder with a 'tsconfig.json'.",
   "Syntax_Colon_0_6023" : "Syntax: {0}",
   "options_6024" : "options",
   "file_6025" : "file",
@@ -621,11 +681,12 @@
   "LOCATION_6037" : "LOCATION",
   "DIRECTORY_6038" : "DIRECTORY",
   "STRATEGY_6039" : "STRATEGY",
+  "FILE_OR_DIRECTORY_6040" : "FILE OR DIRECTORY",
   "Compilation_complete_Watching_for_file_changes_6042" : "Compilation complete. Watching for file changes.",
   "Generates_corresponding_map_file_6043" : "Generates corresponding '.map' file.",
   "Compiler_option_0_expects_an_argument_6044" : "Compiler option '{0}' expects an argument.",
   "Unterminated_quoted_string_in_response_file_0_6045" : "Unterminated quoted string in response file '{0}'.",
-  "Argument_for_0_option_must_be_Colon_1_6046" : "Argument for '{0}' option must be: {1}",
+  "Argument_for_0_option_must_be_Colon_1_6046" : "Argument for '{0}' option must be: {1}.",
   "Locale_must_be_of_the_form_language_or_language_territory_For_example_0_or_1_6048" : "Locale must be of the form <language> or <language>-<territory>. For example '{0}' or '{1}'.",
   "Unsupported_locale_0_6049" : "Unsupported locale '{0}'.",
   "Unable_to_open_file_0_6050" : "Unable to open file '{0}'.",
@@ -647,17 +708,18 @@
   "Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file_6070" : "Initializes a TypeScript project and creates a tsconfig.json file.",
   "Successfully_created_a_tsconfig_json_file_6071" : "Successfully created a tsconfig.json file.",
   "Suppress_excess_property_checks_for_object_literals_6072" : "Suppress excess property checks for object literals.",
-  "Stylize_errors_and_messages_using_color_and_context_experimental_6073" : "Stylize errors and messages using color and context. (experimental)",
+  "Stylize_errors_and_messages_using_color_and_context_experimental_6073" : "Stylize errors and messages using color and context (experimental).",
   "Do_not_report_errors_on_unused_labels_6074" : "Do not report errors on unused labels.",
   "Report_error_when_not_all_code_paths_in_function_return_a_value_6075" : "Report error when not all code paths in function return a value.",
   "Report_errors_for_fallthrough_cases_in_switch_statement_6076" : "Report errors for fallthrough cases in switch statement.",
   "Do_not_report_errors_on_unreachable_code_6077" : "Do not report errors on unreachable code.",
   "Disallow_inconsistently_cased_references_to_the_same_file_6078" : "Disallow inconsistently-cased references to the same file.",
   "Specify_library_files_to_be_included_in_the_compilation_Colon_6079" : "Specify library files to be included in the compilation: ",
-  "Specify_JSX_code_generation_Colon_preserve_or_react_6080" : "Specify JSX code generation: 'preserve' or 'react'",
+  "Specify_JSX_code_generation_Colon_preserve_react_native_or_react_6080" : "Specify JSX code generation: 'preserve', 'react-native', or 'react'.",
+  "File_0_has_an_unsupported_extension_so_skipping_it_6081" : "File '{0}' has an unsupported extension, so skipping it.",
   "Only_amd_and_system_modules_are_supported_alongside_0_6082" : "Only 'amd' and 'system' modules are supported alongside --{0}.",
   "Base_directory_to_resolve_non_absolute_module_names_6083" : "Base directory to resolve non-absolute module names.",
-  "Specify_the_object_invoked_for_createElement_and_spread_when_targeting_react_JSX_emit_6084" : "Specify the object invoked for createElement and __spread when targeting 'react' JSX emit",
+  "Deprecated_Use_jsxFactory_instead_Specify_the_object_invoked_for_createElement_when_targeting_react__6084" : "[Deprecated] Use '--jsxFactory' instead. Specify the object invoked for createElement when targeting 'react' JSX emit",
   "Enable_tracing_of_the_name_resolution_process_6085" : "Enable tracing of the name resolution process.",
   "Resolving_module_0_from_1_6086" : "======== Resolving module '{0}' from '{1}'. ========",
   "Explicitly_specified_module_resolution_kind_Colon_0_6087" : "Explicitly specified module resolution kind: '{0}'.",
@@ -668,23 +730,23 @@
   "Module_name_0_matched_pattern_1_6092" : "Module name '{0}', matched pattern '{1}'.",
   "Trying_substitution_0_candidate_module_location_Colon_1_6093" : "Trying substitution '{0}', candidate module location: '{1}'.",
   "Resolving_module_name_0_relative_to_base_url_1_2_6094" : "Resolving module name '{0}' relative to base url '{1}' - '{2}'.",
-  "Loading_module_as_file_Slash_folder_candidate_module_location_0_6095" : "Loading module as file / folder, candidate module location '{0}'.",
+  "Loading_module_as_file_Slash_folder_candidate_module_location_0_target_file_type_1_6095" : "Loading module as file / folder, candidate module location '{0}', target file type '{1}'.",
   "File_0_does_not_exist_6096" : "File '{0}' does not exist.",
   "File_0_exist_use_it_as_a_name_resolution_result_6097" : "File '{0}' exist - use it as a name resolution result.",
-  "Loading_module_0_from_node_modules_folder_6098" : "Loading module '{0}' from 'node_modules' folder.",
+  "Loading_module_0_from_node_modules_folder_target_file_type_1_6098" : "Loading module '{0}' from 'node_modules' folder, target file type '{1}'.",
   "Found_package_json_at_0_6099" : "Found 'package.json' at '{0}'.",
-  "package_json_does_not_have_types_field_6100" : "'package.json' does not have 'types' field.",
+  "package_json_does_not_have_a_0_field_6100" : "'package.json' does not have a '{0}' field.",
   "package_json_has_0_field_1_that_references_2_6101" : "'package.json' has '{0}' field '{1}' that references '{2}'.",
   "Allow_javascript_files_to_be_compiled_6102" : "Allow javascript files to be compiled.",
   "Option_0_should_have_array_of_strings_as_a_value_6103" : "Option '{0}' should have array of strings as a value.",
   "Checking_if_0_is_the_longest_matching_prefix_for_1_2_6104" : "Checking if '{0}' is the longest matching prefix for '{1}' - '{2}'.",
   "Expected_type_of_0_field_in_package_json_to_be_string_got_1_6105" : "Expected type of '{0}' field in 'package.json' to be 'string', got '{1}'.",
-  "baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1_6106" : "'baseUrl' option is set to '{0}', using this value to resolve non-relative module name '{1}'",
-  "rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0_6107" : "'rootDirs' option is set, using it to resolve relative module name '{0}'",
-  "Longest_matching_prefix_for_0_is_1_6108" : "Longest matching prefix for '{0}' is '{1}'",
-  "Loading_0_from_the_root_dir_1_candidate_location_2_6109" : "Loading '{0}' from the root dir '{1}', candidate location '{2}'",
-  "Trying_other_entries_in_rootDirs_6110" : "Trying other entries in 'rootDirs'",
-  "Module_resolution_using_rootDirs_has_failed_6111" : "Module resolution using 'rootDirs' has failed",
+  "baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1_6106" : "'baseUrl' option is set to '{0}', using this value to resolve non-relative module name '{1}'.",
+  "rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0_6107" : "'rootDirs' option is set, using it to resolve relative module name '{0}'.",
+  "Longest_matching_prefix_for_0_is_1_6108" : "Longest matching prefix for '{0}' is '{1}'.",
+  "Loading_0_from_the_root_dir_1_candidate_location_2_6109" : "Loading '{0}' from the root dir '{1}', candidate location '{2}'.",
+  "Trying_other_entries_in_rootDirs_6110" : "Trying other entries in 'rootDirs'.",
+  "Module_resolution_using_rootDirs_has_failed_6111" : "Module resolution using 'rootDirs' has failed.",
   "Do_not_emit_use_strict_directives_in_module_output_6112" : "Do not emit 'use strict' directives in module output.",
   "Enable_strict_null_checks_6113" : "Enable strict null checks.",
   "Unknown_option_excludes_Did_you_mean_exclude_6114" : "Unknown option 'excludes'. Did you mean 'exclude'?",
@@ -694,26 +756,71 @@
   "Resolving_from_node_modules_folder_6118" : "Resolving from node_modules folder...",
   "Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2_6119" : "======== Type reference directive '{0}' was successfully resolved to '{1}', primary: {2}. ========",
   "Type_reference_directive_0_was_not_resolved_6120" : "======== Type reference directive '{0}' was not resolved. ========",
-  "Resolving_with_primary_search_path_0_6121" : "Resolving with primary search path '{0}'",
+  "Resolving_with_primary_search_path_0_6121" : "Resolving with primary search path '{0}'.",
   "Root_directory_cannot_be_determined_skipping_primary_search_paths_6122" : "Root directory cannot be determined, skipping primary search paths.",
   "Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set_6123" : "======== Resolving type reference directive '{0}', containing file '{1}', root directory not set. ========",
   "Type_declaration_files_to_be_included_in_compilation_6124" : "Type declaration files to be included in compilation.",
-  "Looking_up_in_node_modules_folder_initial_location_0_6125" : "Looking up in 'node_modules' folder, initial location '{0}'",
+  "Looking_up_in_node_modules_folder_initial_location_0_6125" : "Looking up in 'node_modules' folder, initial location '{0}'.",
   "Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_mod_6126" : "Containing file is not specified and root directory cannot be determined, skipping lookup in 'node_modules' folder.",
   "Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1_6127" : "======== Resolving type reference directive '{0}', containing file not set, root directory '{1}'. ========",
   "Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set_6128" : "======== Resolving type reference directive '{0}', containing file not set, root directory not set. ========",
   "The_config_file_0_found_doesn_t_contain_any_source_files_6129" : "The config file '{0}' found doesn't contain any source files.",
-  "Resolving_real_path_for_0_result_1_6130" : "Resolving real path for '{0}', result '{1}'",
+  "Resolving_real_path_for_0_result_1_6130" : "Resolving real path for '{0}', result '{1}'.",
   "Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system_6131" : "Cannot compile modules using option '{0}' unless the '--module' flag is 'amd' or 'system'.",
-  "File_name_0_has_a_1_extension_stripping_it_6132" : "File name '{0}' has a '{1}' extension - stripping it",
+  "File_name_0_has_a_1_extension_stripping_it_6132" : "File name '{0}' has a '{1}' extension - stripping it.",
   "_0_is_declared_but_never_used_6133" : "'{0}' is declared but never used.",
   "Report_errors_on_unused_locals_6134" : "Report errors on unused locals.",
   "Report_errors_on_unused_parameters_6135" : "Report errors on unused parameters.",
-  "The_maximum_dependency_depth_to_search_under_node_modules_and_load_JavaScript_files_6136" : "The maximum dependency depth to search under node_modules and load JavaScript files",
-  "No_types_specified_in_package_json_but_allowJs_is_set_so_returning_main_value_of_0_6137" : "No types specified in 'package.json' but 'allowJs' is set, so returning 'main' value of '{0}'",
+  "The_maximum_dependency_depth_to_search_under_node_modules_and_load_JavaScript_files_6136" : "The maximum dependency depth to search under node_modules and load JavaScript files.",
+  "Cannot_import_type_declaration_files_Consider_importing_0_instead_of_1_6137" : "Cannot import type declaration files. Consider importing '{0}' instead of '{1}'.",
   "Property_0_is_declared_but_never_used_6138" : "Property '{0}' is declared but never used.",
   "Import_emit_helpers_from_tslib_6139" : "Import emit helpers from 'tslib'.",
   "Auto_discovery_for_typings_is_enabled_in_project_0_Running_extra_resolution_pass_for_module_1_using__6140" : "Auto discovery for typings is enabled in project '{0}'. Running extra resolution pass for module '{1}' using cache location '{2}'.",
+  "Parse_in_strict_mode_and_emit_use_strict_for_each_source_file_6141" : "Parse in strict mode and emit \"use strict\" for each source file.",
+  "Module_0_was_resolved_to_1_but_jsx_is_not_set_6142" : "Module '{0}' was resolved to '{1}', but '--jsx' is not set.",
+  "Module_0_was_resolved_to_1_but_allowJs_is_not_set_6143" : "Module '{0}' was resolved to '{1}', but '--allowJs' is not set.",
+  "Module_0_was_resolved_as_locally_declared_ambient_module_in_file_1_6144" : "Module '{0}' was resolved as locally declared ambient module in file '{1}'.",
+  "Module_0_was_resolved_as_ambient_module_declared_in_1_since_this_file_was_not_modified_6145" : "Module '{0}' was resolved as ambient module declared in '{1}' since this file was not modified.",
+  "Specify_the_JSX_factory_function_to_use_when_targeting_react_JSX_emit_e_g_React_createElement_or_h_6146" : "Specify the JSX factory function to use when targeting 'react' JSX emit, e.g. 'React.createElement' or 'h'.",
+  "Resolution_for_module_0_was_found_in_cache_6147" : "Resolution for module '{0}' was found in cache.",
+  "Directory_0_does_not_exist_skipping_all_lookups_in_it_6148" : "Directory '{0}' does not exist, skipping all lookups in it.",
+  "Show_diagnostic_information_6149" : "Show diagnostic information.",
+  "Show_verbose_diagnostic_information_6150" : "Show verbose diagnostic information.",
+  "Emit_a_single_file_with_source_maps_instead_of_having_a_separate_file_6151" : "Emit a single file with source maps instead of having a separate file.",
+  "Emit_the_source_alongside_the_sourcemaps_within_a_single_file_requires_inlineSourceMap_or_sourceMap__6152" : "Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set.",
+  "Transpile_each_file_as_a_separate_module_similar_to_ts_transpileModule_6153" : "Transpile each file as a separate module (similar to 'ts.transpileModule').",
+  "Print_names_of_generated_files_part_of_the_compilation_6154" : "Print names of generated files part of the compilation.",
+  "Print_names_of_files_part_of_the_compilation_6155" : "Print names of files part of the compilation.",
+  "The_locale_used_when_displaying_messages_to_the_user_e_g_en_us_6156" : "The locale used when displaying messages to the user (e.g. 'en-us')",
+  "Do_not_generate_custom_helper_functions_like_extends_in_compiled_output_6157" : "Do not generate custom helper functions like '__extends' in compiled output.",
+  "Do_not_include_the_default_library_file_lib_d_ts_6158" : "Do not include the default library file (lib.d.ts).",
+  "Do_not_add_triple_slash_references_or_imported_modules_to_the_list_of_compiled_files_6159" : "Do not add triple-slash references or imported modules to the list of compiled files.",
+  "Deprecated_Use_skipLibCheck_instead_Skip_type_checking_of_default_library_declaration_files_6160" : "[Deprecated] Use '--skipLibCheck' instead. Skip type checking of default library declaration files.",
+  "List_of_folders_to_include_type_definitions_from_6161" : "List of folders to include type definitions from.",
+  "Disable_size_limitations_on_JavaScript_projects_6162" : "Disable size limitations on JavaScript projects.",
+  "The_character_set_of_the_input_files_6163" : "The character set of the input files.",
+  "Emit_a_UTF_8_Byte_Order_Mark_BOM_in_the_beginning_of_output_files_6164" : "Emit a UTF-8 Byte Order Mark (BOM) in the beginning of output files.",
+  "Do_not_truncate_error_messages_6165" : "Do not truncate error messages.",
+  "Output_directory_for_generated_declaration_files_6166" : "Output directory for generated declaration files.",
+  "A_series_of_entries_which_re_map_imports_to_lookup_locations_relative_to_the_baseUrl_6167" : "A series of entries which re-map imports to lookup locations relative to the 'baseUrl'.",
+  "List_of_root_folders_whose_combined_content_represents_the_structure_of_the_project_at_runtime_6168" : "List of root folders whose combined content represents the structure of the project at runtime.",
+  "Show_all_compiler_options_6169" : "Show all compiler options.",
+  "Deprecated_Use_outFile_instead_Concatenate_and_emit_output_to_single_file_6170" : "[Deprecated] Use '--outFile' instead. Concatenate and emit output to single file",
+  "Command_line_Options_6171" : "Command-line Options",
+  "Basic_Options_6172" : "Basic Options",
+  "Strict_Type_Checking_Options_6173" : "Strict Type-Checking Options",
+  "Module_Resolution_Options_6174" : "Module Resolution Options",
+  "Source_Map_Options_6175" : "Source Map Options",
+  "Additional_Checks_6176" : "Additional Checks",
+  "Experimental_Options_6177" : "Experimental Options",
+  "Advanced_Options_6178" : "Advanced Options",
+  "Provide_full_support_for_iterables_in_for_of_spread_and_destructuring_when_targeting_ES5_or_ES3_6179" : "Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'.",
+  "Enable_all_strict_type_checking_options_6180" : "Enable all strict type-checking options.",
+  "List_of_language_service_plugins_6181" : "List of language service plugins.",
+  "Scoped_package_detected_looking_in_0_6182" : "Scoped package detected, looking in '{0}'",
+  "Reusing_resolution_of_module_0_to_file_1_from_old_program_6183" : "Reusing resolution of module '{0}' to file '{1}' from old program.",
+  "Reusing_module_resolutions_originating_in_0_since_resolutions_are_unchanged_from_old_program_6184" : "Reusing module resolutions originating in '{0}' since resolutions are unchanged from old program.",
+  "Disable_strict_checking_of_generic_signatures_in_function_types_6185" : "Disable strict checking of generic signatures in function types.",
   "Variable_0_implicitly_has_an_1_type_7005" : "Variable '{0}' implicitly has an '{1}' type.",
   "Parameter_0_implicitly_has_an_1_type_7006" : "Parameter '{0}' implicitly has an '{1}' type.",
   "Member_0_implicitly_has_an_1_type_7008" : "Member '{0}' implicitly has an '{1}' type.",
@@ -722,7 +829,8 @@
   "Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type_7011" : "Function expression, which lacks return-type annotation, implicitly has an '{0}' return type.",
   "Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type_7013" : "Construct signature, which lacks return-type annotation, implicitly has an 'any' return type.",
   "Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number_7015" : "Element implicitly has an 'any' type because index expression is not of type 'number'.",
-  "Index_signature_of_object_type_implicitly_has_an_any_type_7017" : "Index signature of object type implicitly has an 'any' type.",
+  "Could_not_find_a_declaration_file_for_module_0_1_implicitly_has_an_any_type_7016" : "Could not find a declaration file for module '{0}'. '{1}' implicitly has an 'any' type.",
+  "Element_implicitly_has_an_any_type_because_type_0_has_no_index_signature_7017" : "Element implicitly has an 'any' type because type '{0}' has no index signature.",
   "Object_literal_s_property_0_implicitly_has_an_1_type_7018" : "Object literal's property '{0}' implicitly has an '{1}' type.",
   "Rest_parameter_0_implicitly_has_an_any_type_7019" : "Rest parameter '{0}' implicitly has an 'any[]' type.",
   "Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type_7020" : "Call signature, which lacks return-type annotation, implicitly has an 'any' return type.",
@@ -730,7 +838,7 @@
   "_0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_reference_7023" : "'{0}' implicitly has return type 'any' because it does not have a return type annotation and is referenced directly or indirectly in one of its return expressions.",
   "Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_ref_7024" : "Function implicitly has return type 'any' because it does not have a return type annotation and is referenced directly or indirectly in one of its return expressions.",
   "Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_typ_7025" : "Generator implicitly has type '{0}' because it does not yield any values. Consider supplying a return type.",
-  "JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists_7026" : "JSX element implicitly has type 'any' because no interface 'JSX.{0}' exists",
+  "JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists_7026" : "JSX element implicitly has type 'any' because no interface 'JSX.{0}' exists.",
   "Unreachable_code_detected_7027" : "Unreachable code detected.",
   "Unused_label_7028" : "Unused label.",
   "Fallthrough_case_in_switch_7029" : "Fallthrough case in switch.",
@@ -738,6 +846,9 @@
   "Binding_element_0_implicitly_has_an_1_type_7031" : "Binding element '{0}' implicitly has an '{1}' type.",
   "Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_parameter_type_annotation_7032" : "Property '{0}' implicitly has type 'any', because its set accessor lacks a parameter type annotation.",
   "Property_0_implicitly_has_type_any_because_its_get_accessor_lacks_a_return_type_annotation_7033" : "Property '{0}' implicitly has type 'any', because its get accessor lacks a return type annotation.",
+  "Variable_0_implicitly_has_type_1_in_some_locations_where_its_type_cannot_be_determined_7034" : "Variable '{0}' implicitly has type '{1}' in some locations where its type cannot be determined.",
+  "Try_npm_install_types_Slash_0_if_it_exists_or_add_a_new_declaration_d_ts_file_containing_declare_mod_7035" : "Try `npm install @types/{0}` if it exists or add a new declaration (.d.ts) file containing `declare module '{0}';`",
+  "Dynamic_import_s_specifier_must_be_of_type_string_but_here_has_type_0_7036" : "Dynamic import's specifier must be of type 'string', but here has type '{0}'.",
   "You_cannot_rename_this_element_8000" : "You cannot rename this element.",
   "You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library_8001" : "You cannot rename elements that are defined in the standard TypeScript library.",
   "import_can_only_be_used_in_a_ts_file_8002" : "'import ... =' can only be used in a .ts file.",
@@ -753,19 +864,52 @@
   "parameter_modifiers_can_only_be_used_in_a_ts_file_8012" : "'parameter modifiers' can only be used in a .ts file.",
   "enum_declarations_can_only_be_used_in_a_ts_file_8015" : "'enum declarations' can only be used in a .ts file.",
   "type_assertion_expressions_can_only_be_used_in_a_ts_file_8016" : "'type assertion expressions' can only be used in a .ts file.",
-  "Only_identifiers_Slashqualified_names_with_optional_type_arguments_are_currently_supported_in_a_clas_9002" : "Only identifiers/qualified-names with optional type arguments are currently supported in a class 'extends' clauses.",
+  "Only_identifiers_Slashqualified_names_with_optional_type_arguments_are_currently_supported_in_a_clas_9002" : "Only identifiers/qualified-names with optional type arguments are currently supported in a class 'extends' clause.",
   "class_expressions_are_not_currently_supported_9003" : "'class' expressions are not currently supported.",
+  "Language_service_is_disabled_9004" : "Language service is disabled.",
   "JSX_attributes_must_only_be_assigned_a_non_empty_expression_17000" : "JSX attributes must only be assigned a non-empty 'expression'.",
   "JSX_elements_cannot_have_multiple_attributes_with_the_same_name_17001" : "JSX elements cannot have multiple attributes with the same name.",
   "Expected_corresponding_JSX_closing_tag_for_0_17002" : "Expected corresponding JSX closing tag for '{0}'.",
   "JSX_attribute_expected_17003" : "JSX attribute expected.",
   "Cannot_use_JSX_unless_the_jsx_flag_is_provided_17004" : "Cannot use JSX unless the '--jsx' flag is provided.",
-  "A_constructor_cannot_contain_a_super_call_when_its_class_extends_null_17005" : "A constructor cannot contain a 'super' call when its class extends 'null'",
+  "A_constructor_cannot_contain_a_super_call_when_its_class_extends_null_17005" : "A constructor cannot contain a 'super' call when its class extends 'null'.",
   "An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_ex_17006" : "An unary expression with the '{0}' operator is not allowed in the left-hand side of an exponentiation expression. Consider enclosing the expression in parentheses.",
   "A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Con_17007" : "A type assertion expression is not allowed in the left-hand side of an exponentiation expression. Consider enclosing the expression in parentheses.",
   "JSX_element_0_has_no_corresponding_closing_tag_17008" : "JSX element '{0}' has no corresponding closing tag.",
   "super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class_17009" : "'super' must be called before accessing 'this' in the constructor of a derived class.",
-  "Unknown_typing_option_0_17010" : "Unknown typing option '{0}'.",
+  "Unknown_type_acquisition_option_0_17010" : "Unknown type acquisition option '{0}'.",
+  "super_must_be_called_before_accessing_a_property_of_super_in_the_constructor_of_a_derived_class_17011" : "'super' must be called before accessing a property of 'super' in the constructor of a derived class.",
+  "_0_is_not_a_valid_meta_property_for_keyword_1_Did_you_mean_2_17012" : "'{0}' is not a valid meta-property for keyword '{1}'. Did you mean '{2}'?",
+  "Meta_property_0_is_only_allowed_in_the_body_of_a_function_declaration_function_expression_or_constru_17013" : "Meta-property '{0}' is only allowed in the body of a function declaration, function expression, or constructor.",
   "Circularity_detected_while_resolving_configuration_Colon_0_18000" : "Circularity detected while resolving configuration: {0}",
-  "The_path_in_an_extends_options_must_be_relative_or_rooted_18001" : "The path in an 'extends' options must be relative or rooted."
+  "A_path_in_an_extends_option_must_be_relative_or_rooted_but_0_is_not_18001" : "A path in an 'extends' option must be relative or rooted, but '{0}' is not.",
+  "The_files_list_in_config_file_0_is_empty_18002" : "The 'files' list in config file '{0}' is empty.",
+  "No_inputs_were_found_in_config_file_0_Specified_include_paths_were_1_and_exclude_paths_were_2_18003" : "No inputs were found in config file '{0}'. Specified 'include' paths were '{1}' and 'exclude' paths were '{2}'.",
+  "Add_missing_super_call_90001" : "Add missing 'super()' call.",
+  "Make_super_call_the_first_statement_in_the_constructor_90002" : "Make 'super()' call the first statement in the constructor.",
+  "Change_extends_to_implements_90003" : "Change 'extends' to 'implements'.",
+  "Remove_declaration_for_Colon_0_90004" : "Remove declaration for: '{0}'.",
+  "Implement_interface_0_90006" : "Implement interface '{0}'.",
+  "Implement_inherited_abstract_class_90007" : "Implement inherited abstract class.",
+  "Add_this_to_unresolved_variable_90008" : "Add 'this.' to unresolved variable.",
+  "Adding_a_tsconfig_json_file_will_help_organize_projects_that_contain_both_TypeScript_and_JavaScript__90009" : "Adding a tsconfig.json file will help organize projects that contain both TypeScript and JavaScript files. Learn more at https://aka.ms/tsconfig.",
+  "Type_0_is_not_assignable_to_type_1_Two_different_types_with_this_name_exist_but_they_are_unrelated_90010" : "Type '{0}' is not assignable to type '{1}'. Two different types with this name exist, but they are unrelated.",
+  "Import_0_from_1_90013" : "Import {0} from {1}.",
+  "Change_0_to_1_90014" : "Change {0} to {1}.",
+  "Add_0_to_existing_import_declaration_from_1_90015" : "Add {0} to existing import declaration from {1}.",
+  "Declare_property_0_90016" : "Declare property '{0}'.",
+  "Add_index_signature_for_property_0_90017" : "Add index signature for property '{0}'.",
+  "Disable_checking_for_this_file_90018" : "Disable checking for this file.",
+  "Ignore_this_error_message_90019" : "Ignore this error message.",
+  "Initialize_property_0_in_the_constructor_90020" : "Initialize property '{0}' in the constructor.",
+  "Initialize_static_property_0_90021" : "Initialize static property '{0}'.",
+  "Change_spelling_to_0_90022" : "Change spelling to '{0}'.",
+  "Declare_method_0_90023" : "Declare method '{0}'.",
+  "Declare_static_method_0_90024" : "Declare static method '{0}'.",
+  "Prefix_0_with_an_underscore_90025" : "Prefix '{0}' with an underscore.",
+  "Convert_function_to_an_ES2015_class_95001" : "Convert function to an ES2015 class",
+  "Convert_function_0_to_class_95002" : "Convert function '{0}' to class",
+  "Octal_literal_types_must_use_ES2015_syntax_Use_the_syntax_0_8017" : "Octal literal types must use ES2015 syntax. Use the syntax '{0}'.",
+  "Octal_literals_are_not_allowed_in_enums_members_initializer_Use_the_syntax_0_8018" : "Octal literals are not allowed in enums members initializer. Use the syntax '{0}'.",
+  "Report_errors_in_js_files_8019" : "Report errors in .js files."
 }
\ No newline at end of file
diff --git a/src/compiler/diagnosticMessages.json b/src/compiler/diagnosticMessages.json
index 71d7a97..c5c90dc 100644
--- a/src/compiler/diagnosticMessages.json
+++ b/src/compiler/diagnosticMessages.json
@@ -163,7 +163,7 @@
         "category": "Error",
         "code": 1054
     },
-    "Type '{0}' is not a valid async function return type.": {
+    "Type '{0}' is not a valid async function return type in ES5/ES3 because it does not refer to a Promise-compatible constructor value.": {
         "category": "Error",
         "code": 1055
     },
@@ -175,15 +175,15 @@
         "category": "Error",
         "code": 1057
     },
-    "Operand for 'await' does not have a valid callable 'then' member.": {
+    "The return type of an async function must either be a valid promise or must not contain a callable 'then' member.": {
         "category": "Error",
         "code": 1058
     },
-    "Return expression in async function does not have a valid callable 'then' member.": {
+    "A promise must have a 'then' method.": {
         "category": "Error",
         "code": 1059
     },
-    "Expression body for async arrow function does not have a valid callable 'then' member.": {
+    "The first parameter of the 'then' method of a promise must be a callback.": {
         "category": "Error",
         "code": 1060
     },
@@ -191,7 +191,7 @@
         "category": "Error",
         "code": 1061
     },
-    "{0} is referenced directly or indirectly in the fulfillment callback of its own 'then' method.": {
+    "Type is referenced directly or indirectly in the fulfillment callback of its own 'then' method.": {
         "category": "Error",
         "code": 1062
     },
@@ -227,7 +227,7 @@
         "category": "Error",
         "code": 1084
     },
-    "Octal literals are not available when targeting ECMAScript 5 and higher.": {
+    "Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '{0}'.": {
         "category": "Error",
         "code": 1085
     },
@@ -291,6 +291,10 @@
         "category": "Error",
         "code": 1102
     },
+    "A 'for-await-of' statement is only allowed within an async function or async generator.": {
+        "category": "Error",
+        "code": 1103
+    },
     "A 'continue' statement can only be used within an enclosing iteration statement.": {
         "category": "Error",
         "code": 1104
@@ -319,7 +323,7 @@
         "category": "Error",
         "code": 1113
     },
-    "Duplicate label '{0}'": {
+    "Duplicate label '{0}'.": {
         "category": "Error",
         "code": 1114
     },
@@ -447,7 +451,7 @@
         "category": "Error",
         "code": 1148
     },
-    "File name '{0}' differs from already included file name '{1}' only in casing": {
+    "File name '{0}' differs from already included file name '{1}' only in casing.": {
         "category": "Error",
         "code": 1149
     },
@@ -455,7 +459,7 @@
         "category": "Error",
         "code": 1150
     },
-    "'const' declarations must be initialized": {
+    "'const' declarations must be initialized.": {
         "category": "Error",
         "code": 1155
     },
@@ -603,10 +607,6 @@
         "category": "Error",
         "code": 1194
     },
-    "Catch clause variable name must be an identifier.": {
-        "category": "Error",
-        "code": 1195
-    },
     "Catch clause variable cannot have a type annotation.": {
         "category": "Error",
         "code": 1196
@@ -635,6 +635,10 @@
         "category": "Error",
         "code": 1203
     },
+    "Cannot re-export a type when the '--isolatedModules' flag is provided.": {
+        "category": "Error",
+        "code": 1205
+    },
     "Decorators are not valid here.": {
         "category": "Error",
         "code": 1206
@@ -655,11 +659,11 @@
         "category": "Error",
         "code": 1210
     },
-    "A class declaration without the 'default' modifier must have a name": {
+    "A class declaration without the 'default' modifier must have a name.": {
         "category": "Error",
         "code": 1211
     },
-    "Identifier expected. '{0}' is a reserved word in strict mode": {
+    "Identifier expected. '{0}' is a reserved word in strict mode.": {
         "category": "Error",
         "code": 1212
     },
@@ -675,6 +679,10 @@
         "category": "Error",
         "code": 1215
     },
+    "Identifier expected. '__esModule' is reserved as an exported marker when transforming ECMAScript modules.": {
+        "category": "Error",
+        "code": 1216
+    },
     "Export assignment is not supported when '--module' flag is 'system'.": {
         "category": "Error",
         "code": 1218
@@ -855,6 +863,51 @@
         "category": "Error",
         "code": 1317
     },
+    "An abstract accessor cannot have an implementation.": {
+        "category": "Error",
+        "code": 1318
+    },
+    "A default export can only be used in an ECMAScript-style module.": {
+        "category": "Error",
+        "code": 1319
+    },
+    "Type of 'await' operand must either be a valid promise or must not contain a callable 'then' member.": {
+        "category": "Error",
+        "code": 1320
+    },
+    "Type of 'yield' operand in an async generator must either be a valid promise or must not contain a callable 'then' member.": {
+        "category": "Error",
+        "code": 1321
+    },
+    "Type of iterated elements of a 'yield*' operand must either be a valid promise or must not contain a callable 'then' member.": {
+        "category": "Error",
+        "code": 1322
+    },
+    "Dynamic import cannot be used when targeting ECMAScript 2015 modules.": {
+        "category": "Error",
+        "code": 1323
+    },
+    "Dynamic import must have one specifier as an argument.": {
+        "category": "Error",
+        "code": 1324
+    },
+    "Specifier of dynamic import cannot be spread element.": {
+        "category": "Error",
+        "code": 1325
+    },
+    "Dynamic import cannot have type arguments": {
+        "category": "Error",
+        "code": 1326
+    },
+    "String literal with double quotes expected.": {
+        "category": "Error",
+        "code": 1327
+    },
+    "Property value can only be string literal, numeric literal, 'true', 'false', 'null', object literal or array literal.": {
+        "category": "Error",
+        "code": 1328
+    },
+
     "Duplicate identifier '{0}'.": {
         "category": "Error",
         "code": 2300
@@ -1027,6 +1080,10 @@
         "category": "Error",
         "code": 2342
     },
+    "This syntax requires an imported helper named '{1}', but module '{0}' has no exported member '{1}'.": {
+        "category": "Error",
+        "code": 2343
+    },
     "Type '{0}' does not satisfy the constraint '{1}'.": {
         "category": "Error",
         "code": 2344
@@ -1035,7 +1092,7 @@
         "category": "Error",
         "code": 2345
     },
-    "Supplied parameters do not match any signature of call target.": {
+    "Call target does not contain any signatures.": {
         "category": "Error",
         "code": 2346
     },
@@ -1067,6 +1124,10 @@
         "category": "Error",
         "code": 2353
     },
+    "This syntax requires an imported helper but module '{0}' cannot be found.": {
+        "category": "Error",
+        "code": 2354
+    },
     "A function whose declared type is neither 'void' nor 'any' must return a value.": {
         "category": "Error",
         "code": 2355
@@ -1075,7 +1136,7 @@
         "category": "Error",
         "code": 2356
     },
-    "The operand of an increment or decrement operator must be a variable, property or indexer.": {
+    "The operand of an increment or decrement operator must be a variable or a property access.": {
         "category": "Error",
         "code": 2357
     },
@@ -1091,7 +1152,7 @@
         "category": "Error",
         "code": 2360
     },
-    "The right-hand side of an 'in' expression must be of type 'any', an object type or a type parameter": {
+    "The right-hand side of an 'in' expression must be of type 'any', an object type or a type parameter.": {
         "category": "Error",
         "code": 2361
     },
@@ -1103,7 +1164,7 @@
         "category": "Error",
         "code": 2363
     },
-    "Invalid left-hand side of assignment expression.": {
+    "The left-hand side of an assignment expression must be a variable or a property access.": {
         "category": "Error",
         "code": 2364
     },
@@ -1115,7 +1176,7 @@
         "category": "Error",
         "code": 2366
     },
-    "Type parameter name cannot be '{0}'": {
+    "Type parameter name cannot be '{0}'.": {
         "category": "Error",
         "code": 2368
     },
@@ -1263,7 +1324,7 @@
         "category": "Error",
         "code": 2405
     },
-    "Invalid left-hand side in 'for...in' statement.": {
+    "The left-hand side of a 'for...in' statement must be a variable or a property access.": {
         "category": "Error",
         "code": 2406
     },
@@ -1275,7 +1336,7 @@
         "category": "Error",
         "code": 2408
     },
-    "Return type of constructor signature must be assignable to the instance type of the class": {
+    "Return type of constructor signature must be assignable to the instance type of the class.": {
         "category": "Error",
         "code": 2409
     },
@@ -1295,7 +1356,7 @@
         "category": "Error",
         "code": 2413
     },
-    "Class name cannot be '{0}'": {
+    "Class name cannot be '{0}'.": {
         "category": "Error",
         "code": 2414
     },
@@ -1331,7 +1392,7 @@
         "category": "Error",
         "code": 2426
     },
-    "Interface name cannot be '{0}'": {
+    "Interface name cannot be '{0}'.": {
         "category": "Error",
         "code": 2427
     },
@@ -1343,7 +1404,7 @@
         "category": "Error",
         "code": 2430
     },
-    "Enum name cannot be '{0}'": {
+    "Enum name cannot be '{0}'.": {
         "category": "Error",
         "code": 2431
     },
@@ -1351,11 +1412,11 @@
         "category": "Error",
         "code": 2432
     },
-    "A namespace declaration cannot be in a different file from a class or function with which it is merged": {
+    "A namespace declaration cannot be in a different file from a class or function with which it is merged.": {
         "category": "Error",
         "code": 2433
     },
-    "A namespace declaration cannot be located prior to a class or function with which it is merged": {
+    "A namespace declaration cannot be located prior to a class or function with which it is merged.": {
         "category": "Error",
         "code": 2434
     },
@@ -1367,11 +1428,11 @@
         "category": "Error",
         "code": 2436
     },
-    "Module '{0}' is hidden by a local declaration with the same name": {
+    "Module '{0}' is hidden by a local declaration with the same name.": {
         "category": "Error",
         "code": 2437
     },
-    "Import name cannot be '{0}'": {
+    "Import name cannot be '{0}'.": {
         "category": "Error",
         "code": 2438
     },
@@ -1379,7 +1440,7 @@
         "category": "Error",
         "code": 2439
     },
-    "Import declaration conflicts with local declaration of '{0}'": {
+    "Import declaration conflicts with local declaration of '{0}'.": {
         "category": "Error",
         "code": 2440
     },
@@ -1415,11 +1476,11 @@
         "category": "Error",
         "code": 2448
     },
-    "The operand of an increment or decrement operator cannot be a constant or a read-only property.": {
+    "Class '{0}' used before its declaration.": {
         "category": "Error",
         "code": 2449
     },
-    "Left-hand side of assignment expression cannot be a constant or a read-only property.": {
+    "Enum '{0}' used before its declaration.": {
         "category": "Error",
         "code": 2450
     },
@@ -1447,7 +1508,7 @@
         "category": "Error",
         "code": 2456
     },
-    "Type alias name cannot be '{0}'": {
+    "Type alias name cannot be '{0}'.": {
         "category": "Error",
         "code": 2457
     },
@@ -1467,7 +1528,7 @@
         "category": "Error",
         "code": 2461
     },
-    "A rest element must be last in an array destructuring pattern": {
+    "A rest element must be last in a destructuring pattern.": {
         "category": "Error",
         "code": 2462
     },
@@ -1551,19 +1612,11 @@
         "category": "Error",
         "code": 2483
     },
-    "Export declaration conflicts with exported declaration of '{0}'": {
+    "Export declaration conflicts with exported declaration of '{0}'.": {
         "category": "Error",
         "code": 2484
     },
-    "The left-hand side of a 'for...of' statement cannot be a constant or a read-only property.": {
-        "category": "Error",
-        "code": 2485
-    },
-    "The left-hand side of a 'for...in' statement cannot be a constant or a read-only property.": {
-        "category": "Error",
-        "code": 2486
-    },
-    "Invalid left-hand side in 'for...of' statement.": {
+    "The left-hand side of a 'for...of' statement must be a variable or a property access.": {
         "category": "Error",
         "code": 2487
     },
@@ -1583,7 +1636,7 @@
         "category": "Error",
         "code": 2491
     },
-    "Cannot redeclare identifier '{0}' in catch clause": {
+    "Cannot redeclare identifier '{0}' in catch clause.": {
         "category": "Error",
         "code": 2492
     },
@@ -1631,6 +1684,10 @@
         "category": "Error",
         "code": 2503
     },
+    "Type must have a '[Symbol.asyncIterator]()' method that returns an async iterator.": {
+        "category": "Error",
+        "code": 2504
+    },
     "A generator cannot have a 'void' type annotation.": {
         "category": "Error",
         "code": 2505
@@ -1687,6 +1744,10 @@
         "category": "Error",
         "code": 2518
     },
+    "An async iterator must have a 'next()' method.": {
+        "category": "Error",
+        "code": 2519
+    },
     "Duplicate identifier '{0}'. Compiler uses declaration '{1}' to support async functions.": {
         "category": "Error",
         "code": 2520
@@ -1751,6 +1812,102 @@
         "category": "Error",
         "code": 2535
     },
+    "Type '{0}' cannot be used to index type '{1}'.": {
+        "category": "Error",
+        "code": 2536
+    },
+    "Type '{0}' has no matching index signature for type '{1}'.": {
+        "category": "Error",
+        "code": 2537
+    },
+    "Type '{0}' cannot be used as an index type.": {
+        "category": "Error",
+        "code": 2538
+    },
+    "Cannot assign to '{0}' because it is not a variable.": {
+        "category": "Error",
+        "code": 2539
+    },
+    "Cannot assign to '{0}' because it is a constant or a read-only property.": {
+        "category": "Error",
+        "code": 2540
+    },
+    "The target of an assignment must be a variable or a property access.": {
+        "category": "Error",
+        "code": 2541
+    },
+    "Index signature in type '{0}' only permits reading.": {
+        "category": "Error",
+        "code": 2542
+    },
+    "Duplicate identifier '_newTarget'. Compiler uses variable declaration '_newTarget' to capture 'new.target' meta-property reference.": {
+        "category": "Error",
+        "code": 2543
+    },
+    "Expression resolves to variable declaration '_newTarget' that compiler uses to capture 'new.target' meta-property reference.": {
+        "category": "Error",
+        "code": 2544
+    },
+    "A mixin class must have a constructor with a single rest parameter of type 'any[]'.": {
+        "category": "Error",
+        "code": 2545
+    },
+    "Property '{0}' has conflicting declarations and is inaccessible in type '{1}'.": {
+        "category": "Error",
+        "code": 2546
+    },
+    "The type returned by the 'next()' method of an async iterator must be a promise for a type with a 'value' property.": {
+        "category": "Error",
+        "code": 2547
+    },
+    "Type '{0}' is not an array type or does not have a '[Symbol.iterator]()' method that returns an iterator.": {
+        "category": "Error",
+        "code": 2548
+    },
+    "Type '{0}' is not an array type or a string type or does not have a '[Symbol.iterator]()' method that returns an iterator.": {
+        "category": "Error",
+        "code": 2549
+    },
+    "Generic type instantiation is excessively deep and possibly infinite.": {
+        "category": "Error",
+        "code": 2550
+    },
+    "Property '{0}' does not exist on type '{1}'. Did you mean '{2}'?": {
+        "category": "Error",
+        "code": 2551
+    },
+    "Cannot find name '{0}'. Did you mean '{1}'?": {
+        "category": "Error",
+        "code": 2552
+    },
+    "Computed values are not permitted in an enum with string valued members.": {
+        "category": "Error",
+        "code": 2553
+    },
+    "Expected {0} arguments, but got {1}.": {
+        "category": "Error",
+        "code": 2554
+    },
+    "Expected at least {0} arguments, but got {1}.": {
+        "category": "Error",
+        "code": 2555
+    },
+    "Expected {0} arguments, but got a minimum of {1}.": {
+        "category": "Error",
+        "code": 2556
+    },
+    "Expected at least {0} arguments, but got a minimum of {1}.": {
+        "category": "Error",
+        "code": 2557
+    },
+    "Expected {0} type arguments, but got {1}.": {
+        "category": "Error",
+        "code": 2558
+    },
+    "Type '{0}' has no properties in common with type '{1}'.": {
+        "category": "Error",
+        "code": 2559
+    },
     "JSX element attributes type '{0}' may not be a union type.": {
         "category": "Error",
         "code": 2600
@@ -1763,7 +1920,7 @@
         "category": "Error",
         "code": 2602
     },
-    "Property '{0}' in type '{1}' is not assignable to type '{2}'": {
+    "Property '{0}' in type '{1}' is not assignable to type '{2}'.": {
         "category": "Error",
         "code": 2603
     },
@@ -1779,17 +1936,21 @@
         "category": "Error",
         "code": 2606
     },
-    "JSX element class does not support attributes because it does not have a '{0}' property": {
+    "JSX element class does not support attributes because it does not have a '{0}' property.": {
         "category": "Error",
         "code": 2607
     },
-    "The global type 'JSX.{0}' may not have more than one property": {
+    "The global type 'JSX.{0}' may not have more than one property.": {
         "category": "Error",
         "code": 2608
     },
-    "Cannot emit namespaced JSX elements in React": {
+    "JSX spread child must be an array type.": {
         "category": "Error",
-        "code": 2650
+        "code": 2609
+    },
+    "Cannot augment module '{0}' with value exports because it resolves to a non-module entity.": {
+        "category": "Error",
+        "code": 2649
     },
     "A member initializer in a enum declaration cannot reference members declared after it, including members defined in other enums.": {
         "category": "Error",
@@ -1811,11 +1972,11 @@
         "category": "Error",
         "code": 2656
     },
-    "JSX expressions must have one parent element": {
+    "JSX expressions must have one parent element.": {
         "category": "Error",
         "code": 2657
     },
-    "Type '{0}' provides no match for the signature '{1}'": {
+    "Type '{0}' provides no match for the signature '{1}'.": {
         "category": "Error",
         "code": 2658
     },
@@ -1843,6 +2004,10 @@
         "category": "Error",
         "code": 2664
     },
+    "Invalid module name in augmentation. Module '{0}' resolves to an untyped module at '{1}', which cannot be augmented.": {
+        "category": "Error",
+        "code": 2665
+    },
     "Exports and export assignments are not permitted in module augmentations.": {
         "category": "Error",
         "code": 2666
@@ -1923,7 +2088,7 @@
         "category": "Error",
         "code": 2685
     },
-    "Identifier '{0}' must be imported from a module": {
+    "'{0}' refers to a UMD global, but the current file is a module. Consider adding an import instead.": {
         "category": "Error",
         "code": 2686
     },
@@ -1939,10 +2104,6 @@
         "category": "Error",
         "code": 2689
     },
-    "A class must be declared after its base class.": {
-        "category": "Error",
-        "code": 2690
-    },
     "An import path cannot end with a '{0}' extension. Consider importing '{1}' instead.": {
         "category": "Error",
         "code": 2691
@@ -1967,6 +2128,70 @@
         "category": "Error",
         "code": 2696
     },
+    "An async function or method must return a 'Promise'. Make sure you have a declaration for 'Promise' or include 'ES2015' in your `--lib` option.": {
+        "category": "Error",
+        "code": 2697
+    },
+    "Spread types may only be created from object types.": {
+        "category": "Error",
+        "code": 2698
+    },
+    "Static property '{0}' conflicts with built-in property 'Function.{0}' of constructor function '{1}'.": {
+        "category": "Error",
+        "code": 2699
+    },
+    "Rest types may only be created from object types.": {
+        "category": "Error",
+        "code": 2700
+    },
+    "The target of an object rest assignment must be a variable or a property access.": {
+        "category": "Error",
+        "code": 2701
+    },
+    "'{0}' only refers to a type, but is being used as a namespace here.": {
+        "category": "Error",
+        "code": 2702
+    },
+    "The operand of a delete operator must be a property reference.": {
+        "category": "Error",
+        "code": 2703
+    },
+    "The operand of a delete operator cannot be a read-only property.": {
+        "category": "Error",
+        "code": 2704
+    },
+    "An async function or method in ES5/ES3 requires the 'Promise' constructor.  Make sure you have a declaration for the 'Promise' constructor or include 'ES2015' in your `--lib` option.": {
+        "category": "Error",
+        "code": 2705
+    },
+    "Required type parameters may not follow optional type parameters.": {
+        "category": "Error",
+        "code": 2706
+    },
+    "Generic type '{0}' requires between {1} and {2} type arguments.": {
+        "category": "Error",
+        "code": 2707
+    },
+    "Cannot use namespace '{0}' as a value.": {
+        "category": "Error",
+        "code": 2708
+    },
+    "Cannot use namespace '{0}' as a type.": {
+        "category": "Error",
+        "code": 2709
+    },
+    "'{0}' are specified twice. The attribute named '{0}' will be overwritten.": {
+        "category": "Error",
+        "code": 2710
+    },
+    "A dynamic import call returns a 'Promise'. Make sure you have a declaration for 'Promise' or include 'ES2015' in your `--lib` option.": {
+        "category": "Error",
+        "code": 2711
+    },
+    "A dynamic import call in ES5/ES3 requires the 'Promise' constructor.  Make sure you have a declaration for the 'Promise' constructor or include 'ES2015' in your `--lib` option.": {
+        "category": "Error",
+        "code": 2712
+    },
 
     "Import declaration '{0}' is using private name '{1}'.": {
         "category": "Error",
@@ -2008,11 +2233,11 @@
         "category": "Error",
         "code": 4019
     },
-    "Extends clause of exported class '{0}' has or is using private name '{1}'.": {
+    "'extends' clause of exported class '{0}' has or is using private name '{1}'.": {
         "category": "Error",
         "code": 4020
     },
-    "Extends clause of exported interface '{0}' has or is using private name '{1}'.": {
+    "'extends' clause of exported interface '{0}' has or is using private name '{1}'.": {
         "category": "Error",
         "code": 4022
     },
@@ -2248,10 +2473,26 @@
         "category": "Error",
         "code": 4082
     },
+    "Type parameter '{0}' of exported type alias has or is using private name '{1}'.": {
+        "category": "Error",
+        "code": 4083
+    },
     "Conflicting definitions for '{0}' found at '{1}' and '{2}'. Consider installing a specific version of this library to resolve the conflict.": {
         "category": "Message",
         "code": 4090
     },
+    "Parameter '{0}' of index signature from exported interface has or is using name '{1}' from private module '{2}'.": {
+        "category": "Error",
+        "code": 4091
+    },
+    "Parameter '{0}' of index signature from exported interface has or is using private name '{1}'.": {
+        "category": "Error",
+        "code": 4092
+    },
+    "Property '{0}' of exported class expression may not be private or protected.": {
+        "category": "Error",
+        "code": 4094
+    },
 
     "The current host does not support the '{0}' option.": {
         "category": "Error",
@@ -2269,14 +2510,10 @@
         "category": "Error",
         "code": 5011
     },
-    "Cannot read file '{0}': {1}": {
+    "Cannot read file '{0}': {1}.": {
         "category": "Error",
         "code": 5012
     },
-    "Unsupported file encoding.": {
-        "category": "Error",
-        "code": 5013
-    },
     "Failed to parse file '{0}': {1}.": {
         "category": "Error",
         "code": 5014
@@ -2289,7 +2526,7 @@
         "category": "Error",
         "code": 5024
     },
-    "Could not write file '{0}': {1}": {
+    "Could not write file '{0}': {1}.": {
         "category": "Error",
         "code": 5033
     },
@@ -2325,11 +2562,11 @@
         "category": "Error",
         "code": 5056
     },
-    "Cannot find a tsconfig.json file at the specified directory: '{0}'": {
+    "Cannot find a tsconfig.json file at the specified directory: '{0}'.": {
         "category": "Error",
         "code": 5057
     },
-    "The specified path does not exist: '{0}'": {
+    "The specified path does not exist: '{0}'.": {
         "category": "Error",
         "code": 5058
     },
@@ -2341,11 +2578,11 @@
         "category": "Error",
         "code": 5060
     },
-    "Pattern '{0}' can have at most one '*' character": {
+    "Pattern '{0}' can have at most one '*' character.": {
         "category": "Error",
         "code": 5061
     },
-    "Substitution '{0}' in pattern '{1}' in can have at most one '*' character": {
+    "Substitution '{0}' in pattern '{1}' in can have at most one '*' character.": {
         "category": "Error",
         "code": 5062
     },
@@ -2365,6 +2602,10 @@
         "category": "Error",
         "code": 5066
     },
+    "Invalid value for 'jsxFactory'. '{0}' is not a valid identifier or qualified-name.": {
+        "category": "Error",
+        "code": 5067
+    },
     "Concatenate and emit output to single file.": {
         "category": "Message",
         "code": 6001
@@ -2413,11 +2654,11 @@
         "category": "Message",
         "code": 6012
     },
-    "Specify ECMAScript target version: 'ES3' (default), 'ES5', or 'ES2015'": {
+    "Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', or 'ESNEXT'.": {
         "category": "Message",
         "code": 6015
     },
-    "Specify module code generation: 'commonjs', 'amd', 'system', 'umd' or 'es2015'": {
+    "Specify module code generation: 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'.": {
         "category": "Message",
         "code": 6016
     },
@@ -2429,7 +2670,7 @@
         "category": "Message",
         "code": 6019
     },
-    "Compile the project in the given directory.": {
+    "Compile the project given the path to its configuration file, or to a folder with a 'tsconfig.json'.": {
         "category": "Message",
         "code": 6020
     },
@@ -2489,6 +2730,10 @@
         "category": "Message",
         "code": 6039
     },
+    "FILE OR DIRECTORY": {
+        "category": "Message",
+        "code": 6040
+    },
     "Compilation complete. Watching for file changes.": {
         "category": "Message",
         "code": 6042
@@ -2505,7 +2750,7 @@
         "category": "Error",
         "code": 6045
     },
-    "Argument for '{0}' option must be: {1}": {
+    "Argument for '{0}' option must be: {1}.": {
         "category": "Error",
         "code": 6046
     },
@@ -2593,7 +2838,7 @@
         "category": "Message",
         "code": 6072
     },
-    "Stylize errors and messages using color and context. (experimental)": {
+    "Stylize errors and messages using color and context (experimental).": {
         "category": "Message",
         "code": 6073
     },
@@ -2621,10 +2866,14 @@
         "category": "Message",
         "code": 6079
     },
-    "Specify JSX code generation: 'preserve' or 'react'": {
+    "Specify JSX code generation: 'preserve', 'react-native', or 'react'.": {
         "category": "Message",
         "code": 6080
     },
+    "File '{0}' has an unsupported extension, so skipping it.": {
+        "category": "Message",
+        "code": 6081
+    },
     "Only 'amd' and 'system' modules are supported alongside --{0}.": {
         "category": "Error",
         "code": 6082
@@ -2633,7 +2882,7 @@
         "category": "Message",
         "code": 6083
     },
-    "Specify the object invoked for createElement and __spread when targeting 'react' JSX emit": {
+    "[Deprecated] Use '--jsxFactory' instead. Specify the object invoked for createElement when targeting 'react' JSX emit": {
         "category": "Message",
         "code": 6084
     },
@@ -2677,7 +2926,7 @@
         "category": "Message",
         "code": 6094
     },
-    "Loading module as file / folder, candidate module location '{0}'.": {
+    "Loading module as file / folder, candidate module location '{0}', target file type '{1}'.": {
         "category": "Message",
         "code": 6095
     },
@@ -2689,7 +2938,7 @@
         "category": "Message",
         "code": 6097
     },
-    "Loading module '{0}' from 'node_modules' folder.": {
+    "Loading module '{0}' from 'node_modules' folder, target file type '{1}'.": {
         "category": "Message",
         "code": 6098
     },
@@ -2697,7 +2946,7 @@
         "category": "Message",
         "code": 6099
     },
-    "'package.json' does not have 'types' field.": {
+    "'package.json' does not have a '{0}' field.": {
         "category": "Message",
         "code": 6100
     },
@@ -2721,27 +2970,27 @@
         "category": "Message",
         "code": 6105
     },
-    "'baseUrl' option is set to '{0}', using this value to resolve non-relative module name '{1}'": {
+    "'baseUrl' option is set to '{0}', using this value to resolve non-relative module name '{1}'.": {
         "category": "Message",
         "code": 6106
     },
-    "'rootDirs' option is set, using it to resolve relative module name '{0}'": {
+    "'rootDirs' option is set, using it to resolve relative module name '{0}'.": {
         "category": "Message",
         "code": 6107
     },
-    "Longest matching prefix for '{0}' is '{1}'": {
+    "Longest matching prefix for '{0}' is '{1}'.": {
         "category": "Message",
         "code": 6108
     },
-    "Loading '{0}' from the root dir '{1}', candidate location '{2}'": {
+    "Loading '{0}' from the root dir '{1}', candidate location '{2}'.": {
         "category": "Message",
         "code": 6109
     },
-    "Trying other entries in 'rootDirs'": {
+    "Trying other entries in 'rootDirs'.": {
         "category": "Message",
         "code": 6110
     },
-    "Module resolution using 'rootDirs' has failed": {
+    "Module resolution using 'rootDirs' has failed.": {
         "category": "Message",
         "code": 6111
     },
@@ -2781,7 +3030,7 @@
         "category": "Message",
         "code": 6120
     },
-    "Resolving with primary search path '{0}'": {
+    "Resolving with primary search path '{0}'.": {
         "category": "Message",
         "code": 6121
     },
@@ -2797,7 +3046,7 @@
         "category": "Message",
         "code": 6124
     },
-    "Looking up in 'node_modules' folder, initial location '{0}'": {
+    "Looking up in 'node_modules' folder, initial location '{0}'.": {
         "category": "Message",
         "code": 6125
     },
@@ -2817,7 +3066,7 @@
         "category": "Error",
         "code": 6129
     },
-    "Resolving real path for '{0}', result '{1}'": {
+    "Resolving real path for '{0}', result '{1}'.": {
         "category": "Message",
         "code": 6130
     },
@@ -2825,7 +3074,7 @@
         "category": "Error",
         "code": 6131
     },
-    "File name '{0}' has a '{1}' extension - stripping it": {
+    "File name '{0}' has a '{1}' extension - stripping it.": {
         "category": "Message",
         "code": 6132
     },
@@ -2841,12 +3090,12 @@
         "category": "Message",
         "code": 6135
     },
-    "The maximum dependency depth to search under node_modules and load JavaScript files": {
+    "The maximum dependency depth to search under node_modules and load JavaScript files.": {
         "category": "Message",
         "code": 6136
     },
-    "No types specified in 'package.json' but 'allowJs' is set, so returning 'main' value of '{0}'": {
-        "category": "Message",
+    "Cannot import type declaration files. Consider importing '{0}' instead of '{1}'.": {
+        "category": "Error",
         "code": 6137
     },
     "Property '{0}' is declared but never used.": {
@@ -2861,6 +3110,186 @@
         "category": "Error",
         "code": 6140
     },
+    "Parse in strict mode and emit \"use strict\" for each source file.": {
+        "category": "Message",
+        "code": 6141
+    },
+    "Module '{0}' was resolved to '{1}', but '--jsx' is not set.": {
+        "category": "Error",
+        "code": 6142
+    },
+    "Module '{0}' was resolved to '{1}', but '--allowJs' is not set.": {
+        "category": "Error",
+        "code": 6143
+    },
+    "Module '{0}' was resolved as locally declared ambient module in file '{1}'.": {
+        "category": "Message",
+        "code": 6144
+    },
+    "Module '{0}' was resolved as ambient module declared in '{1}' since this file was not modified.": {
+        "category": "Message",
+        "code": 6145
+    },
+    "Specify the JSX factory function to use when targeting 'react' JSX emit, e.g. 'React.createElement' or 'h'.": {
+        "category": "Message",
+        "code": 6146
+    },
+    "Resolution for module '{0}' was found in cache.": {
+        "category": "Message",
+        "code": 6147
+    },
+    "Directory '{0}' does not exist, skipping all lookups in it.": {
+        "category": "Message",
+        "code": 6148
+    },
+    "Show diagnostic information.": {
+        "category": "Message",
+        "code": 6149
+    },
+    "Show verbose diagnostic information.": {
+        "category": "Message",
+        "code": 6150
+    },
+    "Emit a single file with source maps instead of having a separate file.": {
+        "category": "Message",
+        "code": 6151
+    },
+    "Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set.": {
+        "category": "Message",
+        "code": 6152
+    },
+    "Transpile each file as a separate module (similar to 'ts.transpileModule').": {
+        "category": "Message",
+        "code": 6153
+    },
+    "Print names of generated files part of the compilation.": {
+        "category": "Message",
+        "code": 6154
+    },
+    "Print names of files part of the compilation.": {
+        "category": "Message",
+        "code": 6155
+    },
+    "The locale used when displaying messages to the user (e.g. 'en-us')": {
+        "category": "Message",
+        "code": 6156
+    },
+    "Do not generate custom helper functions like '__extends' in compiled output.": {
+        "category": "Message",
+        "code": 6157
+    },
+    "Do not include the default library file (lib.d.ts).": {
+        "category": "Message",
+        "code": 6158
+    },
+    "Do not add triple-slash references or imported modules to the list of compiled files.": {
+        "category": "Message",
+        "code": 6159
+    },
+    "[Deprecated] Use '--skipLibCheck' instead. Skip type checking of default library declaration files.": {
+        "category": "Message",
+        "code": 6160
+    },
+    "List of folders to include type definitions from.": {
+        "category": "Message",
+        "code": 6161
+    },
+    "Disable size limitations on JavaScript projects.": {
+        "category": "Message",
+        "code": 6162
+    },
+    "The character set of the input files.": {
+        "category": "Message",
+        "code": 6163
+    },
+    "Emit a UTF-8 Byte Order Mark (BOM) in the beginning of output files.": {
+        "category": "Message",
+        "code": 6164
+    },
+    "Do not truncate error messages.": {
+        "category": "Message",
+        "code": 6165
+    },
+    "Output directory for generated declaration files.": {
+        "category": "Message",
+        "code": 6166
+    },
+    "A series of entries which re-map imports to lookup locations relative to the 'baseUrl'.": {
+        "category": "Message",
+        "code": 6167
+    },
+    "List of root folders whose combined content represents the structure of the project at runtime.": {
+        "category": "Message",
+        "code": 6168
+    },
+    "Show all compiler options.": {
+        "category": "Message",
+        "code": 6169
+    },
+    "[Deprecated] Use '--outFile' instead. Concatenate and emit output to single file": {
+        "category": "Message",
+        "code": 6170
+    },
+    "Command-line Options": {
+        "category": "Message",
+        "code": 6171
+    },
+    "Basic Options": {
+        "category": "Message",
+        "code": 6172
+    },
+    "Strict Type-Checking Options": {
+        "category": "Message",
+        "code": 6173
+    },
+    "Module Resolution Options": {
+        "category": "Message",
+        "code": 6174
+    },
+    "Source Map Options": {
+        "category": "Message",
+        "code": 6175
+    },
+    "Additional Checks": {
+        "category": "Message",
+        "code": 6176
+    },
+    "Experimental Options": {
+        "category": "Message",
+        "code": 6177
+    },
+    "Advanced Options": {
+        "category": "Message",
+        "code": 6178
+    },
+    "Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'.": {
+        "category": "Message",
+        "code": 6179
+    },
+    "Enable all strict type-checking options.": {
+        "category": "Message",
+        "code": 6180
+    },
+    "List of language service plugins.": {
+        "category": "Message",
+        "code": 6181
+    },
+    "Scoped package detected, looking in '{0}'": {
+        "category": "Message",
+        "code": 6182
+    },
+    "Reusing resolution of module '{0}' to file '{1}' from old program.": {
+        "category": "Message",
+        "code": 6183
+    },
+    "Reusing module resolutions originating in '{0}' since resolutions are unchanged from old program.": {
+        "category": "Message",
+        "code": 6184
+    },
+    "Disable strict checking of generic signatures in function types.": {
+        "category": "Message",
+        "code": 6185
+    },
     "Variable '{0}' implicitly has an '{1}' type.": {
         "category": "Error",
         "code": 7005
@@ -2893,7 +3322,11 @@
         "category": "Error",
         "code": 7015
     },
-    "Index signature of object type implicitly has an 'any' type.": {
+    "Could not find a declaration file for module '{0}'. '{1}' implicitly has an 'any' type.": {
+        "category": "Error",
+        "code": 7016
+    },
+    "Element implicitly has an 'any' type because type '{0}' has no index signature.": {
         "category": "Error",
         "code": 7017
     },
@@ -2925,7 +3358,7 @@
         "category": "Error",
         "code": 7025
     },
-    "JSX element implicitly has type 'any' because no interface 'JSX.{0}' exists": {
+    "JSX element implicitly has type 'any' because no interface 'JSX.{0}' exists.": {
         "category": "Error",
         "code": 7026
     },
@@ -2957,6 +3390,19 @@
         "category": "Error",
         "code": 7033
     },
+    "Variable '{0}' implicitly has type '{1}' in some locations where its type cannot be determined.": {
+        "category": "Error",
+        "code": 7034
+    },
+    "Try `npm install @types/{0}` if it exists or add a new declaration (.d.ts) file containing `declare module '{0}';`": {
+        "category": "Error",
+        "code": 7035
+    },
+    "Dynamic import's specifier must be of type 'string', but here has type '{0}'.": {
+        "category": "Error",
+        "code": 7036
+    },
+
     "You cannot rename this element.": {
         "category": "Error",
         "code": 8000
@@ -3017,7 +3463,7 @@
         "category": "Error",
         "code": 8016
     },
-    "Only identifiers/qualified-names with optional type arguments are currently supported in a class 'extends' clauses.": {
+    "Only identifiers/qualified-names with optional type arguments are currently supported in a class 'extends' clause.": {
         "category": "Error",
         "code": 9002
     },
@@ -3025,6 +3471,10 @@
         "category": "Error",
         "code": 9003
     },
+    "Language service is disabled.": {
+        "category": "Error",
+        "code": 9004
+    },
     "JSX attributes must only be assigned a non-empty 'expression'.": {
         "category": "Error",
         "code": 17000
@@ -3045,7 +3495,7 @@
         "category": "Error",
         "code": 17004
     },
-    "A constructor cannot contain a 'super' call when its class extends 'null'": {
+    "A constructor cannot contain a 'super' call when its class extends 'null'.": {
         "category": "Error",
         "code": 17005
     },
@@ -3065,17 +3515,148 @@
         "category": "Error",
         "code": 17009
     },
-    "Unknown typing option '{0}'.": {
+    "Unknown type acquisition option '{0}'.": {
         "category": "Error",
         "code": 17010
     },
+    "'super' must be called before accessing a property of 'super' in the constructor of a derived class.": {
+        "category": "Error",
+        "code": 17011
+    },
+    "'{0}' is not a valid meta-property for keyword '{1}'. Did you mean '{2}'?": {
+        "category": "Error",
+        "code": 17012
+    },
+    "Meta-property '{0}' is only allowed in the body of a function declaration, function expression, or constructor.": {
+        "category": "Error",
+        "code": 17013
+    },
 
     "Circularity detected while resolving configuration: {0}": {
         "category": "Error",
         "code": 18000
     },
-    "The path in an 'extends' options must be relative or rooted.": {
+    "A path in an 'extends' option must be relative or rooted, but '{0}' is not.": {
         "category": "Error",
         "code": 18001
+    },
+    "The 'files' list in config file '{0}' is empty.": {
+        "category": "Error",
+        "code": 18002
+    },
+    "No inputs were found in config file '{0}'. Specified 'include' paths were '{1}' and 'exclude' paths were '{2}'.": {
+        "category": "Error",
+        "code": 18003
+    },
+
+    "Add missing 'super()' call.": {
+        "category": "Message",
+        "code": 90001
+    },
+    "Make 'super()' call the first statement in the constructor.": {
+        "category": "Message",
+        "code": 90002
+    },
+    "Change 'extends' to 'implements'.": {
+        "category": "Message",
+        "code": 90003
+    },
+    "Remove declaration for: '{0}'.": {
+        "category": "Message",
+        "code": 90004
+    },
+    "Implement interface '{0}'.": {
+        "category": "Message",
+        "code": 90006
+    },
+    "Implement inherited abstract class.": {
+        "category": "Message",
+        "code": 90007
+    },
+    "Add 'this.' to unresolved variable.": {
+        "category": "Message",
+        "code": 90008
+    },
+    "Adding a tsconfig.json file will help organize projects that contain both TypeScript and JavaScript files. Learn more at https://aka.ms/tsconfig.": {
+        "category": "Error",
+        "code": 90009
+    },
+    "Type '{0}' is not assignable to type '{1}'. Two different types with this name exist, but they are unrelated.": {
+        "category": "Error",
+        "code": 90010
+    },
+    "Import {0} from {1}.": {
+        "category": "Message",
+        "code": 90013
+    },
+    "Change {0} to {1}.": {
+        "category": "Message",
+        "code": 90014
+    },
+    "Add {0} to existing import declaration from {1}.": {
+        "category": "Message",
+        "code": 90015
+    },
+    "Declare property '{0}'.": {
+        "category": "Message",
+        "code": 90016
+    },
+    "Add index signature for property '{0}'.": {
+        "category": "Message",
+        "code": 90017
+    },
+    "Disable checking for this file.": {
+        "category": "Message",
+        "code": 90018
+    },
+    "Ignore this error message.": {
+        "category": "Message",
+        "code": 90019
+    },
+    "Initialize property '{0}' in the constructor.": {
+        "category": "Message",
+        "code": 90020
+    },
+    "Initialize static property '{0}'.": {
+        "category": "Message",
+        "code": 90021
+    },
+    "Change spelling to '{0}'.": {
+        "category": "Message",
+        "code": 90022
+    },
+    "Declare method '{0}'.": {
+        "category": "Message",
+        "code": 90023
+    },
+    "Declare static method '{0}'.": {
+        "category": "Message",
+        "code": 90024
+    },
+    "Prefix '{0}' with an underscore.": {
+        "category": "Message",
+        "code": 90025
+    },
+    
+    "Convert function to an ES2015 class": {
+        "category": "Message",
+        "code": 95001
+    },
+    "Convert function '{0}' to class": {
+        "category": "Message",
+        "code": 95002
+    },
+
+    "Octal literal types must use ES2015 syntax. Use the syntax '{0}'.": {
+        "category": "Error",
+        "code": 8017
+    },
+    "Octal literals are not allowed in enums members initializer. Use the syntax '{0}'.": {
+        "category": "Error",
+        "code": 8018
+    },
+    "Report errors in .js files.": {
+        "category": "Message",
+        "code": 8019
     }
 }
diff --git a/src/compiler/emitter.ts b/src/compiler/emitter.ts
index b3242e2..65cbee9 100644
--- a/src/compiler/emitter.ts
+++ b/src/compiler/emitter.ts
@@ -1,257 +1,125 @@
-/// <reference path="checker.ts"/>
+/// <reference path="checker.ts" />
 /// <reference path="transformer.ts" />
-/// <reference path="declarationEmitter.ts"/>
-/// <reference path="sourcemap.ts"/>
+/// <reference path="declarationEmitter.ts" />
+/// <reference path="sourcemap.ts" />
 /// <reference path="comments.ts" />
 
-/* @internal */
 namespace ts {
-    // Flags enum to track count of temp variables and a few dedicated names
-    const enum TempFlags {
-        Auto      = 0x00000000,  // No preferred name
-        CountMask = 0x0FFFFFFF,  // Temp variable counter
-        _i        = 0x10000000,  // Use/preference flag for '_i'
+    const delimiters = createDelimiterMap();
+    const brackets = createBracketsMap();
+
+    /*@internal*/
+    /**
+     * Iterates over the source files that are expected to have an emit output.
+     *
+     * @param host An EmitHost.
+     * @param action The action to execute.
+     * @param sourceFilesOrTargetSourceFile
+     *   If an array, the full list of source files to emit.
+     *   Else, calls `getSourceFilesToEmit` with the (optional) target source file to determine the list of source files to emit.
+     */
+    export function forEachEmittedFile(
+        host: EmitHost, action: (emitFileNames: EmitFileNames, sourceFileOrBundle: SourceFile | Bundle, emitOnlyDtsFiles: boolean) => void,
+        sourceFilesOrTargetSourceFile?: SourceFile[] | SourceFile,
+        emitOnlyDtsFiles?: boolean) {
+
+        const sourceFiles = isArray(sourceFilesOrTargetSourceFile) ? sourceFilesOrTargetSourceFile : getSourceFilesToEmit(host, sourceFilesOrTargetSourceFile);
+        const options = host.getCompilerOptions();
+        if (options.outFile || options.out) {
+            if (sourceFiles.length) {
+                const jsFilePath = options.outFile || options.out;
+                const sourceMapFilePath = getSourceMapFilePath(jsFilePath, options);
+                const declarationFilePath = options.declaration ? removeFileExtension(jsFilePath) + Extension.Dts : "";
+                action({ jsFilePath, sourceMapFilePath, declarationFilePath }, createBundle(sourceFiles), emitOnlyDtsFiles);
+            }
+        }
+        else {
+            for (const sourceFile of sourceFiles) {
+                const jsFilePath = getOwnEmitOutputFilePath(sourceFile, host, getOutputExtension(sourceFile, options));
+                const sourceMapFilePath = getSourceMapFilePath(jsFilePath, options);
+                const declarationFilePath = !isSourceFileJavaScript(sourceFile) && (emitOnlyDtsFiles || options.declaration) ? getDeclarationEmitOutputFilePath(sourceFile, host) : undefined;
+                action({ jsFilePath, sourceMapFilePath, declarationFilePath }, sourceFile, emitOnlyDtsFiles);
+            }
+        }
     }
 
-    const id = (s: SourceFile) => s;
-    const nullTransformers: Transformer[] = [ctx => id];
-
-    // targetSourceFile is when users only want one file in entire project to be emitted. This is used in compileOnSave feature
-    export function emitFiles(resolver: EmitResolver, host: EmitHost, targetSourceFile: SourceFile, emitOnlyDtsFiles?: boolean): EmitResult {
-        const delimiters = createDelimiterMap();
-        const brackets = createBracketsMap();
-
-        // emit output for the __extends helper function
-        const extendsHelper = `
-var __extends = (this && this.__extends) || function (d, b) {
-    for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
-    function __() { this.constructor = d; }
-    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
-};`;
-
-        // Emit output for the __assign helper function.
-        // This is typically used for JSX spread attributes,
-        // and can be used for object literal spread properties.
-        const assignHelper = `
-var __assign = (this && this.__assign) || Object.assign || function(t) {
-    for (var s, i = 1, n = arguments.length; i < n; i++) {
-        s = arguments[i];
-        for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
-            t[p] = s[p];
-    }
-    return t;
-};`;
-
-        // emit output for the __decorate helper function
-        const decorateHelper = `
-var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
-    var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
-    if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
-    else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
-    return c > 3 && r && Object.defineProperty(target, key, r), r;
-};`;
-
-        // emit output for the __metadata helper function
-        const metadataHelper = `
-var __metadata = (this && this.__metadata) || function (k, v) {
-    if (typeof Reflect === "object" && typeof Reflect.metadata === "function") return Reflect.metadata(k, v);
-};`;
-
-        // emit output for the __param helper function
-        const paramHelper = `
-var __param = (this && this.__param) || function (paramIndex, decorator) {
-    return function (target, key) { decorator(target, key, paramIndex); }
-};`;
-
-        // emit output for the __awaiter helper function
-        const awaiterHelper = `
-var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
-    return new (P || (P = Promise))(function (resolve, reject) {
-        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
-        function rejected(value) { try { step(generator.throw(value)); } catch (e) { reject(e); } }
-        function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
-        step((generator = generator.apply(thisArg, _arguments)).next());
-    });
-};`;
-
-        // The __generator helper is used by down-level transformations to emulate the runtime
-        // semantics of an ES2015 generator function. When called, this helper returns an
-        // object that implements the Iterator protocol, in that it has `next`, `return`, and
-        // `throw` methods that step through the generator when invoked.
-        //
-        // parameters:
-        //  thisArg  The value to use as the `this` binding for the transformed generator body.
-        //  body     A function that acts as the transformed generator body.
-        //
-        // variables:
-        //  _       Persistent state for the generator that is shared between the helper and the
-        //          generator body. The state object has the following members:
-        //            sent() - A method that returns or throws the current completion value.
-        //            label  - The next point at which to resume evaluation of the generator body.
-        //            trys   - A stack of protected regions (try/catch/finally blocks).
-        //            ops    - A stack of pending instructions when inside of a finally block.
-        //  f       A value indicating whether the generator is executing.
-        //  y       An iterator to delegate for a yield*.
-        //  t       A temporary variable that holds one of the following values (note that these
-        //          cases do not overlap):
-        //          - The completion value when resuming from a `yield` or `yield*`.
-        //          - The error value for a catch block.
-        //          - The current protected region (array of try/catch/finally/end labels).
-        //          - The verb (`next`, `throw`, or `return` method) to delegate to the expression
-        //            of a `yield*`.
-        //          - The result of evaluating the verb delegated to the expression of a `yield*`.
-        //
-        // functions:
-        //  verb(n)     Creates a bound callback to the `step` function for opcode `n`.
-        //  step(op)    Evaluates opcodes in a generator body until execution is suspended or
-        //              completed.
-        //
-        // The __generator helper understands a limited set of instructions:
-        //  0: next(value?)     - Start or resume the generator with the specified value.
-        //  1: throw(error)     - Resume the generator with an exception. If the generator is
-        //                        suspended inside of one or more protected regions, evaluates
-        //                        any intervening finally blocks between the current label and
-        //                        the nearest catch block or function boundary. If uncaught, the
-        //                        exception is thrown to the caller.
-        //  2: return(value?)   - Resume the generator as if with a return. If the generator is
-        //                        suspended inside of one or more protected regions, evaluates any
-        //                        intervening finally blocks.
-        //  3: break(label)     - Jump to the specified label. If the label is outside of the
-        //                        current protected region, evaluates any intervening finally
-        //                        blocks.
-        //  4: yield(value?)    - Yield execution to the caller with an optional value. When
-        //                        resumed, the generator will continue at the next label.
-        //  5: yield*(value)    - Delegates evaluation to the supplied iterator. When
-        //                        delegation completes, the generator will continue at the next
-        //                        label.
-        //  6: catch(error)     - Handles an exception thrown from within the generator body. If
-        //                        the current label is inside of one or more protected regions,
-        //                        evaluates any intervening finally blocks between the current
-        //                        label and the nearest catch block or function boundary. If
-        //                        uncaught, the exception is thrown to the caller.
-        //  7: endfinally       - Ends a finally block, resuming the last instruction prior to
-        //                        entering a finally block.
-        //
-        // For examples of how these are used, see the comments in ./transformers/generators.ts
-        const generatorHelper = `
-var __generator = (this && this.__generator) || function (thisArg, body) {
-    var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t;
-    return { next: verb(0), "throw": verb(1), "return": verb(2) };
-    function verb(n) { return function (v) { return step([n, v]); }; }
-    function step(op) {
-        if (f) throw new TypeError("Generator is already executing.");
-        while (_) try {
-            if (f = 1, y && (t = y[op[0] & 2 ? "return" : op[0] ? "throw" : "next"]) && !(t = t.call(y, op[1])).done) return t;
-            if (y = 0, t) op = [0, t.value];
-            switch (op[0]) {
-                case 0: case 1: t = op; break;
-                case 4: _.label++; return { value: op[1], done: false };
-                case 5: _.label++; y = op[1]; op = [0]; continue;
-                case 7: op = _.ops.pop(); _.trys.pop(); continue;
-                default:
-                    if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
-                    if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
-                    if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
-                    if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
-                    if (t[2]) _.ops.pop();
-                    _.trys.pop(); continue;
-            }
-            op = body.call(thisArg, _);
-        } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
-        if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
-    }
-};`;
-
-        // emit output for the __export helper function
-        const exportStarHelper = `
-function __export(m) {
-    for (var p in m) if (!exports.hasOwnProperty(p)) exports[p] = m[p];
-}`;
-
-        // emit output for the UMD helper function.
-        const umdHelper = `
-(function (dependencies, factory) {
-    if (typeof module === 'object' && typeof module.exports === 'object') {
-        var v = factory(require, exports); if (v !== undefined) module.exports = v;
+    function getSourceMapFilePath(jsFilePath: string, options: CompilerOptions) {
+        return options.sourceMap ? jsFilePath + ".map" : undefined;
     }
-    else if (typeof define === 'function' && define.amd) {
-        define(dependencies, factory);
-    }
-})`;
 
-        const superHelper = `
-const _super = name => super[name];`;
+    // JavaScript files are always LanguageVariant.JSX, as JSX syntax is allowed in .js files also.
+    // So for JavaScript files, '.jsx' is only emitted if the input was '.jsx', and JsxEmit.Preserve.
+    // For TypeScript, the only time to emit with a '.jsx' extension, is on JSX input, and JsxEmit.Preserve
+    function getOutputExtension(sourceFile: SourceFile, options: CompilerOptions): Extension {
+        if (options.jsx === JsxEmit.Preserve) {
+            if (isSourceFileJavaScript(sourceFile)) {
+                if (fileExtensionIs(sourceFile.fileName, Extension.Jsx)) {
+                    return Extension.Jsx;
+                }
+            }
+            else if (sourceFile.languageVariant === LanguageVariant.JSX) {
+                // TypeScript source file preserving JSX syntax
+                return Extension.Jsx;
+            }
+        }
+        return Extension.Js;
+    }
 
-        const advancedSuperHelper = `
-const _super = (function (geti, seti) {
-    const cache = Object.create(null);
-    return name => cache[name] || (cache[name] = { get value() { return geti(name); }, set value(v) { seti(name, v); } });
-})(name => super[name], (name, value) => super[name] = value);`;
+    function getOriginalSourceFileOrBundle(sourceFileOrBundle: SourceFile | Bundle) {
+        if (sourceFileOrBundle.kind === SyntaxKind.Bundle) {
+            return updateBundle(sourceFileOrBundle, sameMap(sourceFileOrBundle.sourceFiles, getOriginalSourceFile));
+        }
+        return getOriginalSourceFile(sourceFileOrBundle);
+    }
 
+    /*@internal*/
+    // targetSourceFile is when users only want one file in entire project to be emitted. This is used in compileOnSave feature
+    export function emitFiles(resolver: EmitResolver, host: EmitHost, targetSourceFile: SourceFile, emitOnlyDtsFiles?: boolean, transformers?: TransformerFactory<SourceFile>[]): EmitResult {
         const compilerOptions = host.getCompilerOptions();
-        const languageVersion = getEmitScriptTarget(compilerOptions);
         const moduleKind = getEmitModuleKind(compilerOptions);
         const sourceMapDataList: SourceMapData[] = compilerOptions.sourceMap || compilerOptions.inlineSourceMap ? [] : undefined;
         const emittedFilesList: string[] = compilerOptions.listEmittedFiles ? [] : undefined;
         const emitterDiagnostics = createDiagnosticCollection();
         const newLine = host.getNewLine();
-        const transformers: Transformer[] = emitOnlyDtsFiles ? nullTransformers : getTransformers(compilerOptions);
         const writer = createTextWriter(newLine);
-        const {
-            write,
-            writeLine,
-            increaseIndent,
-            decreaseIndent
-        } = writer;
-
         const sourceMap = createSourceMapWriter(host, writer);
-        const {
-            emitNodeWithSourceMap,
-            emitTokenWithSourceMap
-        } = sourceMap;
 
-        const comments = createCommentWriter(host, writer, sourceMap);
-        const {
-            emitNodeWithComments,
-            emitBodyWithDetachedComments,
-            emitTrailingCommentsOfPosition
-        } = comments;
-
-        let nodeIdToGeneratedName: string[];
-        let autoGeneratedIdToGeneratedName: string[];
-        let generatedNameSet: Map<string>;
-        let tempFlags: TempFlags;
         let currentSourceFile: SourceFile;
-        let currentText: string;
-        let currentFileIdentifiers: Map<string>;
-        let extendsEmitted: boolean;
-        let assignEmitted: boolean;
-        let decorateEmitted: boolean;
-        let paramEmitted: boolean;
-        let awaiterEmitted: boolean;
+        let bundledHelpers: Map<boolean>;
         let isOwnFileEmit: boolean;
         let emitSkipped = false;
 
         const sourceFiles = getSourceFilesToEmit(host, targetSourceFile);
 
         // Transform the source files
-        performance.mark("beforeTransform");
-        const {
-            transformed,
-            emitNodeWithSubstitution,
-            emitNodeWithNotification
-        } = transformFiles(resolver, host, sourceFiles, transformers);
-        performance.measure("transformTime", "beforeTransform");
+        const transform = transformNodes(resolver, host, compilerOptions, sourceFiles, transformers, /*allowDtsFiles*/ false);
+
+        // Create a printer to print the nodes
+        const printer = createPrinter(compilerOptions, {
+            // resolver hooks
+            hasGlobalName: resolver.hasGlobalName,
+
+            // transform hooks
+            onEmitNode: transform.emitNodeWithNotification,
+            substituteNode: transform.substituteNode,
+
+            // sourcemap hooks
+            onEmitSourceMapOfNode: sourceMap.emitNodeWithSourceMap,
+            onEmitSourceMapOfToken: sourceMap.emitTokenWithSourceMap,
+            onEmitSourceMapOfPosition: sourceMap.emitPos,
+
+            // emitter hooks
+            onEmitHelpers: emitHelpers,
+            onSetSourceFile: setSourceFile,
+        });
 
         // Emit each output file
         performance.mark("beforePrint");
-        forEachTransformedEmitFile(host, transformed, emitFile, emitOnlyDtsFiles);
+        forEachEmittedFile(host, emitSourceFileOrBundle, transform.transformed, emitOnlyDtsFiles);
         performance.measure("printTime", "beforePrint");
 
         // Clean up emit nodes on parse tree
-        for (const sourceFile of sourceFiles) {
-            disposeEmitNodes(sourceFile);
-        }
+        transform.dispose();
 
         return {
             emitSkipped,
@@ -260,11 +128,11 @@ const _super = (function (geti, seti) {
             sourceMaps: sourceMapDataList
         };
 
-        function emitFile(jsFilePath: string, sourceMapFilePath: string, declarationFilePath: string, sourceFiles: SourceFile[], isBundledEmit: boolean) {
+        function emitSourceFileOrBundle({ jsFilePath, sourceMapFilePath, declarationFilePath }: EmitFileNames, sourceFileOrBundle: SourceFile | Bundle) {
             // Make sure not to write js file and source map file if any of them cannot be written
             if (!host.isEmitBlocked(jsFilePath) && !compilerOptions.noEmit) {
                 if (!emitOnlyDtsFiles) {
-                    printFile(jsFilePath, sourceMapFilePath, sourceFiles, isBundledEmit);
+                    printSourceFileOrBundle(jsFilePath, sourceMapFilePath, sourceFileOrBundle);
                 }
             }
             else {
@@ -272,7 +140,7 @@ const _super = (function (geti, seti) {
             }
 
             if (declarationFilePath) {
-                emitSkipped = writeDeclarationFile(declarationFilePath, getOriginalSourceFiles(sourceFiles), isBundledEmit, host, resolver, emitterDiagnostics, emitOnlyDtsFiles) || emitSkipped;
+                emitSkipped = writeDeclarationFile(declarationFilePath, getOriginalSourceFileOrBundle(sourceFileOrBundle), host, resolver, emitterDiagnostics, emitOnlyDtsFiles) || emitSkipped;
             }
 
             if (!emitSkipped && emittedFilesList) {
@@ -288,33 +156,32 @@ const _super = (function (geti, seti) {
             }
         }
 
-        function printFile(jsFilePath: string, sourceMapFilePath: string, sourceFiles: SourceFile[], isBundledEmit: boolean) {
-            sourceMap.initialize(jsFilePath, sourceMapFilePath, sourceFiles, isBundledEmit);
-            nodeIdToGeneratedName = [];
-            autoGeneratedIdToGeneratedName = [];
-            generatedNameSet = createMap<string>();
-            isOwnFileEmit = !isBundledEmit;
+        function printSourceFileOrBundle(jsFilePath: string, sourceMapFilePath: string, sourceFileOrBundle: SourceFile | Bundle) {
+            const bundle = sourceFileOrBundle.kind === SyntaxKind.Bundle ? sourceFileOrBundle : undefined;
+            const sourceFile = sourceFileOrBundle.kind === SyntaxKind.SourceFile ? sourceFileOrBundle : undefined;
+            const sourceFiles = bundle ? bundle.sourceFiles : [sourceFile];
+            sourceMap.initialize(jsFilePath, sourceMapFilePath, sourceFileOrBundle);
 
-            // Emit helpers from all the files
-            if (isBundledEmit && moduleKind) {
-                for (const sourceFile of sourceFiles) {
-                    emitEmitHelpers(sourceFile);
-                }
+            if (bundle) {
+                bundledHelpers = createMap<boolean>();
+                isOwnFileEmit = false;
+                printer.writeBundle(bundle, writer);
+            }
+            else {
+                isOwnFileEmit = true;
+                printer.writeFile(sourceFile, writer);
             }
 
-            // Print each transformed source file.
-            forEach(sourceFiles, printSourceFile);
-
-            writeLine();
+            writer.writeLine();
 
             const sourceMappingURL = sourceMap.getSourceMappingURL();
             if (sourceMappingURL) {
-                write(`//# ${"sourceMappingURL"}=${sourceMappingURL}`); // Sometimes tools can sometimes see this line as a source mapping url comment
+                writer.write(`//# ${"sourceMappingURL"}=${sourceMappingURL}`); // Sometimes tools can sometimes see this line as a source mapping url comment
             }
 
             // Write the source map
             if (compilerOptions.sourceMap && !compilerOptions.inlineSourceMap) {
-                writeFile(host, emitterDiagnostics, sourceMapFilePath, sourceMap.getText(),  /*writeByteOrderMark*/ false);
+                writeFile(host, emitterDiagnostics, sourceMapFilePath, sourceMap.getText(), /*writeByteOrderMark*/ false, sourceFiles);
             }
 
             // Record source map data for the test harness.
@@ -323,162 +190,292 @@ const _super = (function (geti, seti) {
             }
 
             // Write the output file
-            writeFile(host, emitterDiagnostics, jsFilePath, writer.getText(), compilerOptions.emitBOM);
+            writeFile(host, emitterDiagnostics, jsFilePath, writer.getText(), compilerOptions.emitBOM, sourceFiles);
 
             // Reset state
             sourceMap.reset();
-            comments.reset();
             writer.reset();
 
-            tempFlags = TempFlags.Auto;
             currentSourceFile = undefined;
-            currentText = undefined;
-            extendsEmitted = false;
-            assignEmitted = false;
-            decorateEmitted = false;
-            paramEmitted = false;
-            awaiterEmitted = false;
+            bundledHelpers = undefined;
             isOwnFileEmit = false;
         }
 
-        function printSourceFile(node: SourceFile) {
+        function setSourceFile(node: SourceFile) {
             currentSourceFile = node;
-            currentText = node.text;
-            currentFileIdentifiers = node.identifiers;
             sourceMap.setSourceFile(node);
-            comments.setSourceFile(node);
-            pipelineEmitWithNotification(EmitContext.SourceFile, node);
         }
 
-        /**
-         * Emits a node.
-         */
-        function emit(node: Node) {
-            pipelineEmitWithNotification(EmitContext.Unspecified, node);
+        function emitHelpers(node: Node, writeLines: (text: string) => void) {
+            let helpersEmitted = false;
+            const bundle = node.kind === SyntaxKind.Bundle ? <Bundle>node : undefined;
+            if (bundle && moduleKind === ModuleKind.None) {
+                return;
+            }
+
+            const numNodes = bundle ? bundle.sourceFiles.length : 1;
+            for (let i = 0; i < numNodes; i++) {
+                const currentNode = bundle ? bundle.sourceFiles[i] : node;
+                const sourceFile = isSourceFile(currentNode) ? currentNode : currentSourceFile;
+                const shouldSkip = compilerOptions.noEmitHelpers || getExternalHelpersModuleName(sourceFile) !== undefined;
+                const shouldBundle = isSourceFile(currentNode) && !isOwnFileEmit;
+                const helpers = getEmitHelpers(currentNode);
+                if (helpers) {
+                    for (const helper of stableSort(helpers, compareEmitHelpers)) {
+                        if (!helper.scoped) {
+                            // Skip the helper if it can be skipped and the noEmitHelpers compiler
+                            // option is set, or if it can be imported and the importHelpers compiler
+                            // option is set.
+                            if (shouldSkip) continue;
+
+                            // Skip the helper if it can be bundled but hasn't already been emitted and we
+                            // are emitting a bundled module.
+                            if (shouldBundle) {
+                                if (bundledHelpers.get(helper.name)) {
+                                    continue;
+                                }
+
+                                bundledHelpers.set(helper.name, true);
+                            }
+                        }
+                        else if (bundle) {
+                            // Skip the helper if it is scoped and we are emitting bundled helpers
+                            continue;
+                        }
+
+                        writeLines(helper.text);
+                        helpersEmitted = true;
+                    }
+                }
+            }
+
+            return helpersEmitted;
         }
+    }
 
-        /**
-         * Emits an IdentifierName.
-         */
-        function emitIdentifierName(node: Identifier) {
-            pipelineEmitWithNotification(EmitContext.IdentifierName, node);
+    export function createPrinter(printerOptions: PrinterOptions = {}, handlers: PrintHandlers = {}): Printer {
+        const {
+            hasGlobalName,
+            onEmitSourceMapOfNode,
+            onEmitSourceMapOfToken,
+            onEmitSourceMapOfPosition,
+            onEmitNode,
+            onEmitHelpers,
+            onSetSourceFile,
+            substituteNode,
+            onBeforeEmitNodeArray,
+            onAfterEmitNodeArray,
+            onBeforeEmitToken,
+            onAfterEmitToken
+        } = handlers;
+
+        const newLine = getNewLineCharacter(printerOptions);
+        const comments = createCommentWriter(printerOptions, onEmitSourceMapOfPosition);
+        const {
+            emitNodeWithComments,
+            emitBodyWithDetachedComments,
+            emitTrailingCommentsOfPosition,
+            emitLeadingCommentsOfPosition,
+        } = comments;
+
+        let currentSourceFile: SourceFile | undefined;
+        let nodeIdToGeneratedName: string[]; // Map of generated names for specific nodes.
+        let autoGeneratedIdToGeneratedName: string[]; // Map of generated names for temp and loop variables.
+        let generatedNames: Map<string>; // Set of names generated by the NameGenerator.
+        let tempFlagsStack: TempFlags[]; // Stack of enclosing name generation scopes.
+        let tempFlags: TempFlags; // TempFlags for the current name generation scope.
+        let writer: EmitTextWriter;
+        let ownWriter: EmitTextWriter;
+
+        reset();
+        return {
+            // public API
+            printNode,
+            printFile,
+            printBundle,
+
+            // internal API
+            writeNode,
+            writeFile,
+            writeBundle
+        };
+
+        function printNode(hint: EmitHint, node: Node, sourceFile: SourceFile): string {
+            switch (hint) {
+                case EmitHint.SourceFile:
+                    Debug.assert(isSourceFile(node), "Expected a SourceFile node.");
+                    break;
+                case EmitHint.IdentifierName:
+                    Debug.assert(isIdentifier(node), "Expected an Identifier node.");
+                    break;
+                case EmitHint.Expression:
+                    Debug.assert(isExpression(node), "Expected an Expression node.");
+                    break;
+            }
+            switch (node.kind) {
+                case SyntaxKind.SourceFile: return printFile(<SourceFile>node);
+                case SyntaxKind.Bundle: return printBundle(<Bundle>node);
+            }
+            writeNode(hint, node, sourceFile, beginPrint());
+            return endPrint();
         }
 
-        /**
-         * Emits an expression node.
-         */
-        function emitExpression(node: Expression) {
-            pipelineEmitWithNotification(EmitContext.Expression, node);
+        function printBundle(bundle: Bundle): string {
+            writeBundle(bundle, beginPrint());
+            return endPrint();
         }
 
-        /**
-         * Emits a node with possible notification.
-         *
-         * NOTE: Do not call this method directly. It is part of the emit pipeline
-         * and should only be called from printSourceFile, emit, emitExpression, or
-         * emitIdentifierName.
-         */
-        function pipelineEmitWithNotification(emitContext: EmitContext, node: Node) {
-            emitNodeWithNotification(emitContext, node, pipelineEmitWithComments);
+        function printFile(sourceFile: SourceFile): string {
+            writeFile(sourceFile, beginPrint());
+            return endPrint();
         }
 
         /**
-         * Emits a node with comments.
-         *
-         * NOTE: Do not call this method directly. It is part of the emit pipeline
-         * and should only be called indirectly from pipelineEmitWithNotification.
+         * If `sourceFile` is `undefined`, `node` must be a synthesized `TypeNode`.
          */
-        function pipelineEmitWithComments(emitContext: EmitContext, node: Node) {
-            // Do not emit comments for SourceFile
-            if (emitContext === EmitContext.SourceFile) {
-                pipelineEmitWithSourceMap(emitContext, node);
-                return;
+        function writeNode(hint: EmitHint, node: TypeNode, sourceFile: undefined, output: EmitTextWriter): void;
+        function writeNode(hint: EmitHint, node: Node, sourceFile: SourceFile, output: EmitTextWriter): void;
+        function writeNode(hint: EmitHint, node: Node, sourceFile: SourceFile | undefined, output: EmitTextWriter) {
+            const previousWriter = writer;
+            setWriter(output);
+            print(hint, node, sourceFile);
+            reset();
+            writer = previousWriter;
+        }
+
+        function writeBundle(bundle: Bundle, output: EmitTextWriter) {
+            const previousWriter = writer;
+            setWriter(output);
+            emitShebangIfNeeded(bundle);
+            emitPrologueDirectivesIfNeeded(bundle);
+            emitHelpersIndirect(bundle);
+            for (const sourceFile of bundle.sourceFiles) {
+                print(EmitHint.SourceFile, sourceFile, sourceFile);
             }
+            reset();
+            writer = previousWriter;
+        }
 
-            emitNodeWithComments(emitContext, node, pipelineEmitWithSourceMap);
+        function writeFile(sourceFile: SourceFile, output: EmitTextWriter) {
+            const previousWriter = writer;
+            setWriter(output);
+            emitShebangIfNeeded(sourceFile);
+            emitPrologueDirectivesIfNeeded(sourceFile);
+            print(EmitHint.SourceFile, sourceFile, sourceFile);
+            reset();
+            writer = previousWriter;
         }
 
-        /**
-         * Emits a node with source maps.
-         *
-         * NOTE: Do not call this method directly. It is part of the emit pipeline
-         * and should only be called indirectly from pipelineEmitWithComments.
-         */
-        function pipelineEmitWithSourceMap(emitContext: EmitContext, node: Node) {
-            // Do not emit source mappings for SourceFile or IdentifierName
-            if (emitContext === EmitContext.SourceFile
-                || emitContext === EmitContext.IdentifierName) {
-                pipelineEmitWithSubstitution(emitContext, node);
-                return;
+        function beginPrint() {
+            return ownWriter || (ownWriter = createTextWriter(newLine));
+        }
+
+        function endPrint() {
+            const text = ownWriter.getText();
+            ownWriter.reset();
+            return text;
+        }
+
+        function print(hint: EmitHint, node: Node, sourceFile: SourceFile | undefined) {
+            if (sourceFile) {
+                setSourceFile(sourceFile);
             }
+            pipelineEmitWithNotification(hint, node);
+        }
 
-            emitNodeWithSourceMap(emitContext, node, pipelineEmitWithSubstitution);
+        function setSourceFile(sourceFile: SourceFile) {
+            currentSourceFile = sourceFile;
+            comments.setSourceFile(sourceFile);
+            if (onSetSourceFile) {
+                onSetSourceFile(sourceFile);
+            }
         }
 
-        /**
-         * Emits a node with possible substitution.
-         *
-         * NOTE: Do not call this method directly. It is part of the emit pipeline
-         * and should only be called indirectly from pipelineEmitWithSourceMap or
-         * pipelineEmitInUnspecifiedContext (when picking a more specific context).
-         */
-        function pipelineEmitWithSubstitution(emitContext: EmitContext, node: Node) {
-            emitNodeWithSubstitution(emitContext, node, pipelineEmitForContext);
+        function setWriter(output: EmitTextWriter | undefined) {
+            writer = output;
+            comments.setWriter(output);
         }
 
-        /**
-         * Emits a node.
-         *
-         * NOTE: Do not call this method directly. It is part of the emit pipeline
-         * and should only be called indirectly from pipelineEmitWithSubstitution.
-         */
-        function pipelineEmitForContext(emitContext: EmitContext, node: Node): void {
-            switch (emitContext) {
-                case EmitContext.SourceFile: return pipelineEmitInSourceFileContext(node);
-                case EmitContext.IdentifierName: return pipelineEmitInIdentifierNameContext(node);
-                case EmitContext.Unspecified: return pipelineEmitInUnspecifiedContext(node);
-                case EmitContext.Expression: return pipelineEmitInExpressionContext(node);
+        function reset() {
+            nodeIdToGeneratedName = [];
+            autoGeneratedIdToGeneratedName = [];
+            generatedNames = createMap<string>();
+            tempFlagsStack = [];
+            tempFlags = TempFlags.Auto;
+            comments.reset();
+            setWriter(/*output*/ undefined);
+        }
+
+        function emit(node: Node) {
+            pipelineEmitWithNotification(EmitHint.Unspecified, node);
+        }
+
+        function emitIdentifierName(node: Identifier) {
+            pipelineEmitWithNotification(EmitHint.IdentifierName, node);
+        }
+
+        function emitExpression(node: Expression) {
+            pipelineEmitWithNotification(EmitHint.Expression, node);
+        }
+
+        function pipelineEmitWithNotification(hint: EmitHint, node: Node) {
+            if (onEmitNode) {
+                onEmitNode(hint, node, pipelineEmitWithComments);
+            }
+            else {
+                pipelineEmitWithComments(hint, node);
             }
         }
 
-        /**
-         * Emits a node in the SourceFile EmitContext.
-         *
-         * NOTE: Do not call this method directly. It is part of the emit pipeline
-         * and should only be called indirectly from pipelineEmitForContext.
-         */
-        function pipelineEmitInSourceFileContext(node: Node): void {
-            const kind = node.kind;
-            switch (kind) {
-                // Top-level nodes
-                case SyntaxKind.SourceFile:
-                    return emitSourceFile(<SourceFile>node);
+        function pipelineEmitWithComments(hint: EmitHint, node: Node) {
+            node = trySubstituteNode(hint, node);
+            if (emitNodeWithComments && hint !== EmitHint.SourceFile) {
+                emitNodeWithComments(hint, node, pipelineEmitWithSourceMap);
+            }
+            else {
+                pipelineEmitWithSourceMap(hint, node);
             }
         }
 
-        /**
-         * Emits a node in the IdentifierName EmitContext.
-         *
-         * NOTE: Do not call this method directly. It is part of the emit pipeline
-         * and should only be called indirectly from pipelineEmitForContext.
-         */
-        function pipelineEmitInIdentifierNameContext(node: Node): void {
-            const kind = node.kind;
-            switch (kind) {
-                // Identifiers
-                case SyntaxKind.Identifier:
-                    return emitIdentifier(<Identifier>node);
+        function pipelineEmitWithSourceMap(hint: EmitHint, node: Node) {
+            if (onEmitSourceMapOfNode && hint !== EmitHint.SourceFile && hint !== EmitHint.IdentifierName) {
+                onEmitSourceMapOfNode(hint, node, pipelineEmitWithHint);
+            }
+            else {
+                pipelineEmitWithHint(hint, node);
             }
         }
 
-        /**
-         * Emits a node in the Unspecified EmitContext.
-         *
-         * NOTE: Do not call this method directly. It is part of the emit pipeline
-         * and should only be called indirectly from pipelineEmitForContext.
-         */
-        function pipelineEmitInUnspecifiedContext(node: Node): void {
+        function pipelineEmitWithHint(hint: EmitHint, node: Node): void {
+            switch (hint) {
+                case EmitHint.SourceFile: return pipelineEmitSourceFile(node);
+                case EmitHint.IdentifierName: return pipelineEmitIdentifierName(node);
+                case EmitHint.Expression: return pipelineEmitExpression(node);
+                case EmitHint.Unspecified: return pipelineEmitUnspecified(node);
+            }
+        }
+
+        function pipelineEmitSourceFile(node: Node): void {
+            Debug.assertNode(node, isSourceFile);
+            emitSourceFile(<SourceFile>node);
+        }
+
+        function pipelineEmitIdentifierName(node: Node): void {
+            Debug.assertNode(node, isIdentifier);
+            emitIdentifier(<Identifier>node);
+        }
+
+        function pipelineEmitUnspecified(node: Node): void {
             const kind = node.kind;
+
+            // Reserved words
+            // Strict mode reserved words
+            // Contextual keywords
+            if (isKeyword(kind)) {
+                writeTokenNode(node);
+                return;
+            }
+
             switch (kind) {
                 // Pseudo-literals
                 case SyntaxKind.TemplateHead:
@@ -490,32 +487,6 @@ const _super = (function (geti, seti) {
                 case SyntaxKind.Identifier:
                     return emitIdentifier(<Identifier>node);
 
-                // Reserved words
-                case SyntaxKind.ConstKeyword:
-                case SyntaxKind.DefaultKeyword:
-                case SyntaxKind.ExportKeyword:
-                case SyntaxKind.VoidKeyword:
-
-                // Strict mode reserved words
-                case SyntaxKind.PrivateKeyword:
-                case SyntaxKind.ProtectedKeyword:
-                case SyntaxKind.PublicKeyword:
-                case SyntaxKind.StaticKeyword:
-
-                // Contextual keywords
-                case SyntaxKind.AbstractKeyword:
-                case SyntaxKind.AnyKeyword:
-                case SyntaxKind.AsyncKeyword:
-                case SyntaxKind.BooleanKeyword:
-                case SyntaxKind.DeclareKeyword:
-                case SyntaxKind.NumberKeyword:
-                case SyntaxKind.ReadonlyKeyword:
-                case SyntaxKind.StringKeyword:
-                case SyntaxKind.SymbolKeyword:
-                case SyntaxKind.GlobalKeyword:
-                    writeTokenText(kind);
-                    return;
-
                 // Parse tree nodes
 
                 // Names
@@ -579,7 +550,13 @@ const _super = (function (geti, seti) {
                 case SyntaxKind.ExpressionWithTypeArguments:
                     return emitExpressionWithTypeArguments(<ExpressionWithTypeArguments>node);
                 case SyntaxKind.ThisType:
-                    return emitThisType(<ThisTypeNode>node);
+                    return emitThisType();
+                case SyntaxKind.TypeOperator:
+                    return emitTypeOperator(<TypeOperatorNode>node);
+                case SyntaxKind.IndexedAccessType:
+                    return emitIndexedAccessType(<IndexedAccessTypeNode>node);
+                case SyntaxKind.MappedType:
+                    return emitMappedType(<MappedTypeNode>node);
                 case SyntaxKind.LiteralType:
                     return emitLiteralType(<LiteralTypeNode>node);
 
@@ -595,7 +572,7 @@ const _super = (function (geti, seti) {
                 case SyntaxKind.TemplateSpan:
                     return emitTemplateSpan(<TemplateSpan>node);
                 case SyntaxKind.SemicolonClassElement:
-                    return emitSemicolonClassElement(<SemicolonClassElement>node);
+                    return emitSemicolonClassElement();
 
                 // Statements
                 case SyntaxKind.Block:
@@ -603,7 +580,7 @@ const _super = (function (geti, seti) {
                 case SyntaxKind.VariableStatement:
                     return emitVariableStatement(<VariableStatement>node);
                 case SyntaxKind.EmptyStatement:
-                    return emitEmptyStatement(<EmptyStatement>node);
+                    return emitEmptyStatement();
                 case SyntaxKind.ExpressionStatement:
                     return emitExpressionStatement(<ExpressionStatement>node);
                 case SyntaxKind.IfStatement:
@@ -655,9 +632,11 @@ const _super = (function (geti, seti) {
                 case SyntaxKind.ModuleDeclaration:
                     return emitModuleDeclaration(<ModuleDeclaration>node);
                 case SyntaxKind.ModuleBlock:
-                    return emitModuleBlock(<Block>node);
+                    return emitModuleBlock(<ModuleBlock>node);
                 case SyntaxKind.CaseBlock:
                     return emitCaseBlock(<CaseBlock>node);
+                case SyntaxKind.NamespaceExportDeclaration:
+                    return emitNamespaceExportDeclaration(<NamespaceExportDeclaration>node);
                 case SyntaxKind.ImportEqualsDeclaration:
                     return emitImportEqualsDeclaration(<ImportEqualsDeclaration>node);
                 case SyntaxKind.ImportDeclaration:
@@ -694,6 +673,8 @@ const _super = (function (geti, seti) {
                     return emitJsxClosingElement(<JsxClosingElement>node);
                 case SyntaxKind.JsxAttribute:
                     return emitJsxAttribute(<JsxAttribute>node);
+                case SyntaxKind.JsxAttributes:
+                    return emitJsxAttributes(<JsxAttributes>node);
                 case SyntaxKind.JsxSpreadAttribute:
                     return emitJsxSpreadAttribute(<JsxSpreadAttribute>node);
                 case SyntaxKind.JsxExpression:
@@ -714,6 +695,8 @@ const _super = (function (geti, seti) {
                     return emitPropertyAssignment(<PropertyAssignment>node);
                 case SyntaxKind.ShorthandPropertyAssignment:
                     return emitShorthandPropertyAssignment(<ShorthandPropertyAssignment>node);
+                case SyntaxKind.SpreadAssignment:
+                    return emitSpreadAssignment(node as SpreadAssignment);
 
                 // Enum
                 case SyntaxKind.EnumMember:
@@ -726,17 +709,16 @@ const _super = (function (geti, seti) {
             // If the node is an expression, try to emit it as an expression with
             // substitution.
             if (isExpression(node)) {
-                return pipelineEmitWithSubstitution(EmitContext.Expression, node);
+                return pipelineEmitExpression(trySubstituteNode(EmitHint.Expression, node));
+            }
+
+            if (isToken(node)) {
+                writeTokenNode(node);
+                return;
             }
         }
 
-        /**
-         * Emits a node in the Expression EmitContext.
-         *
-         * NOTE: Do not call this method directly. It is part of the emit pipeline
-         * and should only be called indirectly from pipelineEmitForContext.
-         */
-        function pipelineEmitInExpressionContext(node: Node): void {
+        function pipelineEmitExpression(node: Node): void {
             const kind = node.kind;
             switch (kind) {
                 // Literals
@@ -758,7 +740,8 @@ const _super = (function (geti, seti) {
                 case SyntaxKind.SuperKeyword:
                 case SyntaxKind.TrueKeyword:
                 case SyntaxKind.ThisKeyword:
-                    writeTokenText(kind);
+                case SyntaxKind.ImportKeyword:
+                    writeTokenNode(node);
                     return;
 
                 // Expressions
@@ -804,8 +787,8 @@ const _super = (function (geti, seti) {
                     return emitTemplateExpression(<TemplateExpression>node);
                 case SyntaxKind.YieldExpression:
                     return emitYieldExpression(<YieldExpression>node);
-                case SyntaxKind.SpreadElementExpression:
-                    return emitSpreadElementExpression(<SpreadElementExpression>node);
+                case SyntaxKind.SpreadElement:
+                    return emitSpreadExpression(<SpreadElement>node);
                 case SyntaxKind.ClassExpression:
                     return emitClassExpression(<ClassExpression>node);
                 case SyntaxKind.OmittedExpression:
@@ -814,6 +797,8 @@ const _super = (function (geti, seti) {
                     return emitAsExpression(<AsExpression>node);
                 case SyntaxKind.NonNullExpression:
                     return emitNonNullExpression(<NonNullExpression>node);
+                case SyntaxKind.MetaProperty:
+                    return emitMetaProperty(<MetaProperty>node);
 
                 // JSX
                 case SyntaxKind.JsxElement:
@@ -824,6 +809,19 @@ const _super = (function (geti, seti) {
                 // Transformation nodes
                 case SyntaxKind.PartiallyEmittedExpression:
                     return emitPartiallyEmittedExpression(<PartiallyEmittedExpression>node);
+
+                case SyntaxKind.CommaListExpression:
+                    return emitCommaList(<CommaListExpression>node);
+            }
+        }
+
+        function trySubstituteNode(hint: EmitHint, node: Node) {
+            return node && substituteNode && substituteNode(hint, node) || node;
+        }
+
+        function emitHelpersIndirect(node: Node) {
+            if (onEmitHelpers) {
+                onEmitHelpers(node, writeLines);
             }
         }
 
@@ -834,9 +832,6 @@ const _super = (function (geti, seti) {
         // SyntaxKind.NumericLiteral
         function emitNumericLiteral(node: NumericLiteral) {
             emitLiteral(node);
-            if (node.trailingComment) {
-                write(` /*${node.trailingComment}*/`);
-            }
         }
 
         // SyntaxKind.StringLiteral
@@ -847,7 +842,7 @@ const _super = (function (geti, seti) {
         // SyntaxKind.TemplateTail
         function emitLiteral(node: LiteralLikeNode) {
             const text = getLiteralTextOfNode(node);
-            if ((compilerOptions.sourceMap || compilerOptions.inlineSourceMap)
+            if ((printerOptions.sourceMap || printerOptions.inlineSourceMap)
                 && (node.kind === SyntaxKind.StringLiteral || isTemplateLiteralKind(node.kind))) {
                 writer.writeLiteral(text);
             }
@@ -861,12 +856,8 @@ const _super = (function (geti, seti) {
         //
 
         function emitIdentifier(node: Identifier) {
-            if (getEmitFlags(node) & EmitFlags.UMDDefine) {
-                writeLines(umdHelper);
-            }
-            else {
-                write(getTextOfNode(node, /*includeTrivia*/ false));
-            }
+            write(getTextOfNode(node, /*includeTrivia*/ false));
+            emitTypeArguments(node, node.typeArguments);
         }
 
         //
@@ -901,6 +892,7 @@ const _super = (function (geti, seti) {
         function emitTypeParameter(node: TypeParameterDeclaration) {
             emit(node.name);
             emitWithPrefix(" extends ", node.constraint);
+            emitWithPrefix(" = ", node.default);
         }
 
         function emitParameter(node: ParameterDeclaration) {
@@ -909,8 +901,8 @@ const _super = (function (geti, seti) {
             writeIfPresent(node.dotDotDotToken, "...");
             emit(node.name);
             writeIfPresent(node.questionToken, "?");
-            emitExpressionWithPrefix(" = ", node.initializer);
             emitWithPrefix(": ", node.type);
+            emitExpressionWithPrefix(" = ", node.initializer);
         }
 
         function emitDecorator(decorator: Decorator) {
@@ -935,6 +927,7 @@ const _super = (function (geti, seti) {
             emitDecorators(node, node.decorators);
             emitModifiers(node, node.modifiers);
             emit(node.name);
+            writeIfPresent(node.questionToken, "?");
             emitWithPrefix(": ", node.type);
             emitExpressionWithPrefix(" = ", node.initializer);
             write(";");
@@ -956,6 +949,7 @@ const _super = (function (geti, seti) {
             emitModifiers(node, node.modifiers);
             writeIfPresent(node.asteriskToken, "*");
             emit(node.name);
+            writeIfPresent(node.questionToken, "?");
             emitSignatureAndBody(node, emitSignatureHead);
         }
 
@@ -1000,7 +994,7 @@ const _super = (function (geti, seti) {
             write(";");
         }
 
-        function emitSemicolonClassElement(node: SemicolonClassElement) {
+        function emitSemicolonClassElement() {
             write(";");
         }
 
@@ -1029,7 +1023,7 @@ const _super = (function (geti, seti) {
         function emitConstructorType(node: ConstructorTypeNode) {
             write("new ");
             emitTypeParameters(node, node.typeParameters);
-            emitParametersForArrow(node, node.parameters);
+            emitParameters(node, node.parameters);
             write(" => ");
             emit(node.type);
         }
@@ -1041,7 +1035,10 @@ const _super = (function (geti, seti) {
 
         function emitTypeLiteral(node: TypeLiteralNode) {
             write("{");
-            emitList(node, node.members, ListFormat.TypeLiteralMembers);
+            // If the literal is empty, do not add spaces between braces.
+            if (node.members.length > 0) {
+                emitList(node, node.members, getEmitFlags(node) & EmitFlags.SingleLine ? ListFormat.SingleLineTypeLiteralMembers : ListFormat.MultiLineTypeLiteralMembers);
+            }
             write("}");
         }
 
@@ -1070,10 +1067,53 @@ const _super = (function (geti, seti) {
             write(")");
         }
 
-        function emitThisType(node: ThisTypeNode) {
+        function emitThisType() {
             write("this");
         }
 
+        function emitTypeOperator(node: TypeOperatorNode) {
+            writeTokenText(node.operator);
+            write(" ");
+            emit(node.type);
+        }
+
+        function emitIndexedAccessType(node: IndexedAccessTypeNode) {
+            emit(node.objectType);
+            write("[");
+            emit(node.indexType);
+            write("]");
+        }
+
+        function emitMappedType(node: MappedTypeNode) {
+            const emitFlags = getEmitFlags(node);
+            write("{");
+            if (emitFlags & EmitFlags.SingleLine) {
+                write(" ");
+            }
+            else {
+                writeLine();
+                increaseIndent();
+            }
+            writeIfPresent(node.readonlyToken, "readonly ");
+            write("[");
+            emit(node.typeParameter.name);
+            write(" in ");
+            emit(node.typeParameter.constraint);
+            write("]");
+            writeIfPresent(node.questionToken, "?");
+            write(": ");
+            emit(node.type);
+            write(";");
+            if (emitFlags & EmitFlags.SingleLine) {
+                write(" ");
+            }
+            else {
+                writeLine();
+                decreaseIndent();
+            }
+            write("}");
+        }
+
         function emitLiteralType(node: LiteralTypeNode) {
             emitExpression(node.literal);
         }
@@ -1140,7 +1180,7 @@ const _super = (function (geti, seti) {
                 }
 
                 const preferNewLine = node.multiLine ? ListFormat.PreferNewLine : ListFormat.None;
-                const allowTrailingComma = languageVersion >= ScriptTarget.ES5 ? ListFormat.AllowTrailingComma : ListFormat.None;
+                const allowTrailingComma = currentSourceFile.languageVersion >= ScriptTarget.ES5 ? ListFormat.AllowTrailingComma : ListFormat.None;
                 emitList(node, properties, ListFormat.ObjectLiteralExpressionProperties | allowTrailingComma | preferNewLine);
 
                 if (indentedFlag) {
@@ -1154,7 +1194,7 @@ const _super = (function (geti, seti) {
             let indentAfterDot = false;
             if (!(getEmitFlags(node) & EmitFlags.NoIndentation)) {
                 const dotRangeStart = node.expression.end;
-                const dotRangeEnd = skipTrivia(currentText, node.expression.end) + 1;
+                const dotRangeEnd = skipTrivia(currentSourceFile.text, node.expression.end) + 1;
                 const dotToken = <Node>{ kind: SyntaxKind.DotToken, pos: dotRangeStart, end: dotRangeEnd };
                 indentBeforeDot = needsIndentation(node, node.expression, dotToken);
                 indentAfterDot = needsIndentation(node, dotToken, node.name);
@@ -1174,18 +1214,20 @@ const _super = (function (geti, seti) {
         // 1..toString is a valid property access, emit a dot after the literal
         // Also emit a dot if expression is a integer const enum value - it will appear in generated code as numeric literal
         function needsDotDotForPropertyAccess(expression: Expression) {
-            if (expression.kind === SyntaxKind.NumericLiteral) {
-                // check if numeric literal was originally written with a dot
+            expression = skipPartiallyEmittedExpressions(expression);
+            if (isNumericLiteral(expression)) {
+                // check if numeric literal is a decimal literal that was originally written with a dot
                 const text = getLiteralTextOfNode(<LiteralExpression>expression);
-                return text.indexOf(tokenToString(SyntaxKind.DotToken)) < 0;
+                return !expression.numericLiteralFlags
+                    && text.indexOf(tokenToString(SyntaxKind.DotToken)) < 0;
             }
             else if (isPropertyAccessExpression(expression) || isElementAccessExpression(expression)) {
                 // check if constant enum value is integer
                 const constantValue = getConstantValue(expression);
                 // isFinite handles cases when constantValue is undefined
-                return isFinite(constantValue)
+                return typeof constantValue === "number" && isFinite(constantValue)
                     && Math.floor(constantValue) === constantValue
-                    && compilerOptions.removeComments;
+                    && printerOptions.removeComments;
             }
         }
 
@@ -1198,12 +1240,14 @@ const _super = (function (geti, seti) {
 
         function emitCallExpression(node: CallExpression) {
             emitExpression(node.expression);
+            emitTypeArguments(node, node.typeArguments);
             emitExpressionList(node, node.arguments, ListFormat.CallExpressionArguments);
         }
 
         function emitNewExpression(node: NewExpression) {
             write("new ");
             emitExpression(node.expression);
+            emitTypeArguments(node, node.typeArguments);
             emitExpressionList(node, node.arguments, ListFormat.NewExpressionArguments);
         }
 
@@ -1214,12 +1258,9 @@ const _super = (function (geti, seti) {
         }
 
         function emitTypeAssertionExpression(node: TypeAssertion) {
-            if (node.type) {
-                write("<");
-                emit(node.type);
-                write(">");
-            }
-
+            write("<");
+            emit(node.type);
+            write(">");
             emitExpression(node.expression);
         }
 
@@ -1290,7 +1331,7 @@ const _super = (function (geti, seti) {
             const operand = node.operand;
             return operand.kind === SyntaxKind.PrefixUnaryExpression
                 && ((node.operator === SyntaxKind.PlusToken && ((<PrefixUnaryExpression>operand).operator === SyntaxKind.PlusToken || (<PrefixUnaryExpression>operand).operator === SyntaxKind.PlusPlusToken))
-                || (node.operator === SyntaxKind.MinusToken && ((<PrefixUnaryExpression>operand).operator === SyntaxKind.MinusToken || (<PrefixUnaryExpression>operand).operator === SyntaxKind.MinusMinusToken)));
+                    || (node.operator === SyntaxKind.MinusToken && ((<PrefixUnaryExpression>operand).operator === SyntaxKind.MinusToken || (<PrefixUnaryExpression>operand).operator === SyntaxKind.MinusMinusToken)));
         }
 
         function emitPostfixUnaryExpression(node: PostfixUnaryExpression) {
@@ -1305,7 +1346,7 @@ const _super = (function (geti, seti) {
 
             emitExpression(node.left);
             increaseIndentIf(indentBeforeOperator, isCommaOperator ? " " : undefined);
-            writeTokenText(node.operatorToken.kind);
+            writeTokenNode(node.operatorToken);
             increaseIndentIf(indentAfterOperator, " ");
             emitExpression(node.right);
             decreaseIndentIf(indentBeforeOperator, indentAfterOperator);
@@ -1341,7 +1382,7 @@ const _super = (function (geti, seti) {
             emitExpressionWithPrefix(" ", node.expression);
         }
 
-        function emitSpreadElementExpression(node: SpreadElementExpression) {
+        function emitSpreadExpression(node: SpreadElement) {
             write("...");
             emitExpression(node.expression);
         }
@@ -1368,6 +1409,12 @@ const _super = (function (geti, seti) {
             write("!");
         }
 
+        function emitMetaProperty(node: MetaProperty) {
+            writeToken(node.keywordToken, node.pos);
+            write(".");
+            emit(node.name);
+        }
+
         //
         // Misc
         //
@@ -1381,7 +1428,7 @@ const _super = (function (geti, seti) {
         // Statements
         //
 
-        function emitBlock(node: Block, format?: ListFormat) {
+        function emitBlock(node: Block) {
             if (isSingleLineEmptyBlock(node)) {
                 writeToken(SyntaxKind.OpenBraceToken, node.pos, /*contextNode*/ node);
                 write(" ");
@@ -1390,11 +1437,15 @@ const _super = (function (geti, seti) {
             else {
                 writeToken(SyntaxKind.OpenBraceToken, node.pos, /*contextNode*/ node);
                 emitBlockStatements(node);
+                // We have to call emitLeadingComments explicitly here because otherwise leading comments of the close brace token will not be emitted
+                increaseIndent();
+                emitLeadingCommentsOfPosition(node.statements.end);
+                decreaseIndent();
                 writeToken(SyntaxKind.CloseBraceToken, node.statements.end, /*contextNode*/ node);
             }
         }
 
-        function emitBlockStatements(node: Block) {
+        function emitBlockStatements(node: BlockLike) {
             if (getEmitFlags(node) & EmitFlags.SingleLine) {
                 emitList(node, node.statements, ListFormat.SingleLineBlockStatements);
             }
@@ -1409,7 +1460,7 @@ const _super = (function (geti, seti) {
             write(";");
         }
 
-        function emitEmptyStatement(node: EmptyStatement) {
+        function emitEmptyStatement() {
             write(";");
         }
 
@@ -1424,28 +1475,28 @@ const _super = (function (geti, seti) {
             writeToken(SyntaxKind.OpenParenToken, openParenPos, node);
             emitExpression(node.expression);
             writeToken(SyntaxKind.CloseParenToken, node.expression.end, node);
-            emitEmbeddedStatement(node.thenStatement);
+            emitEmbeddedStatement(node, node.thenStatement);
             if (node.elseStatement) {
-                writeLine();
+                writeLineOrSpace(node);
                 writeToken(SyntaxKind.ElseKeyword, node.thenStatement.end, node);
                 if (node.elseStatement.kind === SyntaxKind.IfStatement) {
                     write(" ");
                     emit(node.elseStatement);
                 }
                 else {
-                    emitEmbeddedStatement(node.elseStatement);
+                    emitEmbeddedStatement(node, node.elseStatement);
                 }
             }
         }
 
         function emitDoStatement(node: DoStatement) {
             write("do");
-            emitEmbeddedStatement(node.statement);
+            emitEmbeddedStatement(node, node.statement);
             if (isBlock(node.statement)) {
                 write(" ");
             }
             else {
-                writeLine();
+                writeLineOrSpace(node);
             }
 
             write("while (");
@@ -1457,7 +1508,7 @@ const _super = (function (geti, seti) {
             write("while (");
             emitExpression(node.expression);
             write(")");
-            emitEmbeddedStatement(node.statement);
+            emitEmbeddedStatement(node, node.statement);
         }
 
         function emitForStatement(node: ForStatement) {
@@ -1470,7 +1521,7 @@ const _super = (function (geti, seti) {
             write(";");
             emitExpressionWithPrefix(" ", node.incrementor);
             write(")");
-            emitEmbeddedStatement(node.statement);
+            emitEmbeddedStatement(node, node.statement);
         }
 
         function emitForInStatement(node: ForInStatement) {
@@ -1481,18 +1532,19 @@ const _super = (function (geti, seti) {
             write(" in ");
             emitExpression(node.expression);
             writeToken(SyntaxKind.CloseParenToken, node.expression.end);
-            emitEmbeddedStatement(node.statement);
+            emitEmbeddedStatement(node, node.statement);
         }
 
         function emitForOfStatement(node: ForOfStatement) {
             const openParenPos = writeToken(SyntaxKind.ForKeyword, node.pos);
             write(" ");
+            emitWithSuffix(node.awaitModifier, " ");
             writeToken(SyntaxKind.OpenParenToken, openParenPos);
             emitForBinding(node.initializer);
             write(" of ");
             emitExpression(node.expression);
             writeToken(SyntaxKind.CloseParenToken, node.expression.end);
-            emitEmbeddedStatement(node.statement);
+            emitEmbeddedStatement(node, node.statement);
         }
 
         function emitForBinding(node: VariableDeclarationList | Expression) {
@@ -1528,7 +1580,7 @@ const _super = (function (geti, seti) {
             write("with (");
             emitExpression(node.expression);
             write(")");
-            emitEmbeddedStatement(node.statement);
+            emitEmbeddedStatement(node, node.statement);
         }
 
         function emitSwitchStatement(node: SwitchStatement) {
@@ -1556,9 +1608,12 @@ const _super = (function (geti, seti) {
         function emitTryStatement(node: TryStatement) {
             write("try ");
             emit(node.tryBlock);
-            emit(node.catchClause);
+            if (node.catchClause) {
+                writeLineOrSpace(node);
+                emit(node.catchClause);
+            }
             if (node.finallyBlock) {
-                writeLine();
+                writeLineOrSpace(node);
                 write("finally ");
                 emit(node.finallyBlock);
             }
@@ -1575,6 +1630,7 @@ const _super = (function (geti, seti) {
 
         function emitVariableDeclaration(node: VariableDeclaration) {
             emit(node.name);
+            emitWithPrefix(": ", node.type);
             emitExpressionWithPrefix(" = ", node.initializer);
         }
 
@@ -1595,6 +1651,10 @@ const _super = (function (geti, seti) {
             emitSignatureAndBody(node, emitSignatureHead);
         }
 
+        function emitBlockCallback(_hint: EmitHint, body: Node): void {
+            emitBlockFunctionBody(<Block>body);
+        }
+
         function emitSignatureAndBody(node: FunctionLikeDeclaration, emitSignatureHead: (node: SignatureDeclaration) => void) {
             const body = node.body;
             if (body) {
@@ -1606,14 +1666,23 @@ const _super = (function (geti, seti) {
 
                     if (getEmitFlags(node) & EmitFlags.ReuseTempVariableScope) {
                         emitSignatureHead(node);
-                        emitBlockFunctionBody(node, body);
+                        if (onEmitNode) {
+                            onEmitNode(EmitHint.Unspecified, body, emitBlockCallback);
+                        }
+                        else {
+                            emitBlockFunctionBody(body);
+                        }
                     }
                     else {
-                        const savedTempFlags = tempFlags;
-                        tempFlags = 0;
+                        pushNameGenerationScope();
                         emitSignatureHead(node);
-                        emitBlockFunctionBody(node, body);
-                        tempFlags = savedTempFlags;
+                        if (onEmitNode) {
+                            onEmitNode(EmitHint.Unspecified, body, emitBlockCallback);
+                        }
+                        else {
+                            emitBlockFunctionBody(body);
+                        }
+                        popNameGenerationScope();
                     }
 
                     if (indentedFlag) {
@@ -1639,7 +1708,7 @@ const _super = (function (geti, seti) {
             emitWithPrefix(": ", node.type);
         }
 
-        function shouldEmitBlockFunctionBodyOnSingleLine(parentNode: Node, body: Block) {
+        function shouldEmitBlockFunctionBodyOnSingleLine(body: Block) {
             // We must emit a function body as a single-line body in the following case:
             // * The body has NodeEmitFlags.SingleLine specified.
 
@@ -1677,14 +1746,20 @@ const _super = (function (geti, seti) {
             return true;
         }
 
-        function emitBlockFunctionBody(parentNode: Node, body: Block) {
+        function emitBlockFunctionBody(body: Block) {
             write(" {");
             increaseIndent();
 
-            emitBodyWithDetachedComments(body, body.statements,
-                shouldEmitBlockFunctionBodyOnSingleLine(parentNode, body)
-                    ? emitBlockFunctionBodyOnSingleLine
-                    : emitBlockFunctionBodyWorker);
+            const emitBlockFunctionBody = shouldEmitBlockFunctionBodyOnSingleLine(body)
+                ? emitBlockFunctionBodyOnSingleLine
+                : emitBlockFunctionBodyWorker;
+
+            if (emitBodyWithDetachedComments) {
+                emitBodyWithDetachedComments(body, body.statements, emitBlockFunctionBody);
+            }
+            else {
+                emitBlockFunctionBody(body);
+            }
 
             decreaseIndent();
             writeToken(SyntaxKind.CloseBraceToken, body.statements.end, body);
@@ -1697,9 +1772,9 @@ const _super = (function (geti, seti) {
         function emitBlockFunctionBodyWorker(body: Block, emitBlockFunctionBodyOnSingleLine?: boolean) {
             // Emit all the prologue directives (like "use strict").
             const statementOffset = emitPrologueDirectives(body.statements, /*startWithNewLine*/ true);
-            const helpersEmitted = emitHelpers(body);
-
-            if (statementOffset === 0 && !helpersEmitted && emitBlockFunctionBodyOnSingleLine) {
+            const pos = writer.getTextPos();
+            emitHelpersIndirect(body);
+            if (statementOffset === 0 && pos === writer.getTextPos() && emitBlockFunctionBodyOnSingleLine) {
                 decreaseIndent();
                 emitList(body, body.statements, ListFormat.SingleLineFunctionBodyStatements);
                 increaseIndent();
@@ -1727,18 +1802,15 @@ const _super = (function (geti, seti) {
             emitTypeParameters(node, node.typeParameters);
             emitList(node, node.heritageClauses, ListFormat.ClassHeritageClauses);
 
-            const savedTempFlags = tempFlags;
-            tempFlags = 0;
-
+            pushNameGenerationScope();
             write(" {");
             emitList(node, node.members, ListFormat.ClassMembers);
             write("}");
+            popNameGenerationScope();
 
             if (indentedFlag) {
                 decreaseIndent();
             }
-
-            tempFlags = savedTempFlags;
         }
 
         function emitInterfaceDeclaration(node: InterfaceDeclaration) {
@@ -1768,14 +1840,11 @@ const _super = (function (geti, seti) {
             emitModifiers(node, node.modifiers);
             write("enum ");
             emit(node.name);
-
-            const savedTempFlags = tempFlags;
-            tempFlags = 0;
-
+            pushNameGenerationScope();
             write(" {");
             emitList(node, node.members, ListFormat.EnumMembers);
             write("}");
-            tempFlags = savedTempFlags;
+            popNameGenerationScope();
         }
 
         function emitModuleDeclaration(node: ModuleDeclaration) {
@@ -1795,17 +1864,15 @@ const _super = (function (geti, seti) {
         }
 
         function emitModuleBlock(node: ModuleBlock) {
-            if (isSingleLineEmptyBlock(node)) {
+            if (isEmptyBlock(node)) {
                 write("{ }");
             }
             else {
-                const savedTempFlags = tempFlags;
-                tempFlags = 0;
+                pushNameGenerationScope();
                 write("{");
-                increaseIndent();
                 emitBlockStatements(node);
                 write("}");
-                tempFlags = savedTempFlags;
+                popNameGenerationScope();
             }
         }
 
@@ -1886,6 +1953,12 @@ const _super = (function (geti, seti) {
             write(";");
         }
 
+        function emitNamespaceExportDeclaration(node: NamespaceExportDeclaration) {
+            write("export as namespace ");
+            emit(node.name);
+            write(";");
+        }
+
         function emitNamedExports(node: NamedExports) {
             emitNamedImportsOrExports(node);
         }
@@ -1933,15 +2006,21 @@ const _super = (function (geti, seti) {
             write("<");
             emitJsxTagName(node.tagName);
             write(" ");
-            emitList(node, node.attributes, ListFormat.JsxElementAttributes);
+            // We are checking here so we won't re-enter the emiting pipeline and emit extra sourcemap
+            if (node.attributes.properties && node.attributes.properties.length > 0) {
+                emit(node.attributes);
+            }
             write("/>");
         }
 
         function emitJsxOpeningElement(node: JsxOpeningElement) {
             write("<");
             emitJsxTagName(node.tagName);
-            writeIfAny(node.attributes, " ");
-            emitList(node, node.attributes, ListFormat.JsxElementAttributes);
+            writeIfAny(node.attributes.properties, " ");
+            // We are checking here so we won't re-enter the emitting pipeline and emit extra sourcemap
+            if (node.attributes.properties && node.attributes.properties.length > 0) {
+                emit(node.attributes);
+            }
             write(">");
         }
 
@@ -1955,6 +2034,10 @@ const _super = (function (geti, seti) {
             write(">");
         }
 
+        function emitJsxAttributes(node: JsxAttributes) {
+            emitList(node, node.properties, ListFormat.JsxElementAttributes);
+        }
+
         function emitJsxAttribute(node: JsxAttribute) {
             emit(node.name);
             emitWithPrefix("=", node.initializer);
@@ -1969,6 +2052,9 @@ const _super = (function (geti, seti) {
         function emitJsxExpression(node: JsxExpression) {
             if (node.expression) {
                 write("{");
+                if (node.dotDotDotToken) {
+                    write("...");
+                }
                 emitExpression(node.expression);
                 write("}");
             }
@@ -2010,6 +2096,22 @@ const _super = (function (geti, seti) {
                     rangeStartPositionsAreOnSameLine(parentNode, statements[0], currentSourceFile)
                 );
 
+            // e.g:
+            //      case 0: // Zero
+            //      case 1: // One
+            //      case 2: // two
+            //          return "hi";
+            // If there is no statements, emitNodeWithComments of the parentNode which is caseClause will take care of trailing comment.
+            // So in example above, comment "// Zero" and "// One" will be emit in emitTrailingComments in emitNodeWithComments.
+            // However, for "case 2", because parentNode which is caseClause has an "end" property to be end of the statements (in this case return statement)
+            // comment "// two" will not be emitted in emitNodeWithComments.
+            // Therefore, we have to do the check here to emit such comment.
+            if (statements.length > 0) {
+                // We use emitTrailingCommentsOfPosition instead of emitLeadingCommentsOfPosition because leading comments is defined as comments before the node after newline character separating it from previous line
+                // Note: we can't use parentNode.end as such position includes statements.
+                emitTrailingCommentsOfPosition(statements.pos);
+            }
+
             if (emitAsSingleStatement) {
                 write(" ");
                 emit(statements[0]);
@@ -2027,7 +2129,6 @@ const _super = (function (geti, seti) {
         }
 
         function emitCatchClause(node: CatchClause) {
-            writeLine();
             const openParenPos = writeToken(SyntaxKind.CatchKeyword, node.pos);
             write(" ");
             writeToken(SyntaxKind.OpenParenToken, openParenPos);
@@ -2052,11 +2153,10 @@ const _super = (function (geti, seti) {
             // "comment1" is not considered to be leading comment for node.initializer
             // but rather a trailing comment on the previous node.
             const initializer = node.initializer;
-            if ((getEmitFlags(initializer) & EmitFlags.NoLeadingComments) === 0) {
+            if (emitTrailingCommentsOfPosition && (getEmitFlags(initializer) & EmitFlags.NoLeadingComments) === 0) {
                 const commentRange = getCommentRange(initializer);
                 emitTrailingCommentsOfPosition(commentRange.pos);
             }
-
             emitExpression(initializer);
         }
 
@@ -2068,6 +2168,13 @@ const _super = (function (geti, seti) {
             }
         }
 
+        function emitSpreadAssignment(node: SpreadAssignment) {
+            if (node.expression) {
+                write("...");
+                emitExpression(node.expression);
+            }
+        }
+
         //
         // Enum
         //
@@ -2083,18 +2190,28 @@ const _super = (function (geti, seti) {
 
         function emitSourceFile(node: SourceFile) {
             writeLine();
-            emitShebang();
-            emitBodyWithDetachedComments(node, node.statements, emitSourceFileWorker);
+            const statements = node.statements;
+            if (emitBodyWithDetachedComments) {
+                // Emit detached comment if there are no prologue directives or if the first node is synthesized.
+                // The synthesized node will have no leading comment so some comments may be missed.
+                const shouldEmitDetachedComment = statements.length === 0 ||
+                    !isPrologueDirective(statements[0]) ||
+                    nodeIsSynthesized(statements[0]);
+                if (shouldEmitDetachedComment) {
+                    emitBodyWithDetachedComments(node, statements, emitSourceFileWorker);
+                    return;
+                }
+            }
+            emitSourceFileWorker(node);
         }
 
         function emitSourceFileWorker(node: SourceFile) {
             const statements = node.statements;
-            const statementOffset = emitPrologueDirectives(statements);
-            const savedTempFlags = tempFlags;
-            tempFlags = 0;
-            emitHelpers(node);
-            emitList(node, statements, ListFormat.MultiLine, statementOffset);
-            tempFlags = savedTempFlags;
+            pushNameGenerationScope();
+            emitHelpersIndirect(node);
+            const index = findIndex(statements, statement => !isPrologueDirective(statement));
+            emitList(node, statements, ListFormat.MultiLine, index === -1 ? statements.length : index);
+            popNameGenerationScope();
         }
 
         // Transformation nodes
@@ -2103,17 +2220,28 @@ const _super = (function (geti, seti) {
             emitExpression(node.expression);
         }
 
+        function emitCommaList(node: CommaListExpression) {
+            emitExpressionList(node, node.elements, ListFormat.CommaListElements);
+        }
+
         /**
          * Emits any prologue directives at the start of a Statement list, returning the
          * number of prologue directives written to the output.
          */
-        function emitPrologueDirectives(statements: Node[], startWithNewLine?: boolean): number {
+        function emitPrologueDirectives(statements: Node[], startWithNewLine?: boolean, seenPrologueDirectives?: Map<String>): number {
             for (let i = 0; i < statements.length; i++) {
-                if (isPrologueDirective(statements[i])) {
-                    if (startWithNewLine || i > 0) {
-                        writeLine();
+                const statement = statements[i];
+                if (isPrologueDirective(statement)) {
+                    const shouldEmitPrologueDirective = seenPrologueDirectives ? !seenPrologueDirectives.has(statement.expression.text) : true;
+                    if (shouldEmitPrologueDirective) {
+                        if (startWithNewLine || i > 0) {
+                            writeLine();
+                        }
+                        emit(statement);
+                        if (seenPrologueDirectives) {
+                            seenPrologueDirectives.set(statement.expression.text, statement.expression.text);
+                        }
                     }
-                    emit(statements[i]);
                 }
                 else {
                     // return index of the first non prologue directive
@@ -2124,100 +2252,35 @@ const _super = (function (geti, seti) {
             return statements.length;
         }
 
-        function emitHelpers(node: Node) {
-            const emitFlags = getEmitFlags(node);
-            let helpersEmitted = false;
-            if (emitFlags & EmitFlags.EmitEmitHelpers) {
-                helpersEmitted = emitEmitHelpers(currentSourceFile);
-            }
-
-            if (emitFlags & EmitFlags.EmitExportStar) {
-                writeLines(exportStarHelper);
-                helpersEmitted = true;
+        function emitPrologueDirectivesIfNeeded(sourceFileOrBundle: Bundle | SourceFile) {
+            if (isSourceFile(sourceFileOrBundle)) {
+                setSourceFile(sourceFileOrBundle as SourceFile);
+                emitPrologueDirectives((sourceFileOrBundle as SourceFile).statements);
             }
-
-            if (emitFlags & EmitFlags.EmitSuperHelper) {
-                writeLines(superHelper);
-                helpersEmitted = true;
-            }
-
-            if (emitFlags & EmitFlags.EmitAdvancedSuperHelper) {
-                writeLines(advancedSuperHelper);
-                helpersEmitted = true;
-            }
-
-            return helpersEmitted;
-        }
-
-        function emitEmitHelpers(node: SourceFile) {
-            // Only emit helpers if the user did not say otherwise.
-            if (compilerOptions.noEmitHelpers) {
-                return false;
-            }
-
-            // Don't emit helpers if we can import them.
-            if (compilerOptions.importHelpers
-                && (isExternalModule(node) || compilerOptions.isolatedModules)) {
-                return false;
-            }
-
-            let helpersEmitted = false;
-
-            // Only Emit __extends function when target ES5.
-            // For target ES6 and above, we can emit classDeclaration as is.
-            if ((languageVersion < ScriptTarget.ES6) && (!extendsEmitted && node.flags & NodeFlags.HasClassExtends)) {
-                writeLines(extendsHelper);
-                extendsEmitted = true;
-                helpersEmitted = true;
-            }
-
-            if (compilerOptions.jsx !== JsxEmit.Preserve && !assignEmitted && (node.flags & NodeFlags.HasJsxSpreadAttributes)) {
-                writeLines(assignHelper);
-                assignEmitted = true;
-            }
-
-            if (!decorateEmitted && node.flags & NodeFlags.HasDecorators) {
-                writeLines(decorateHelper);
-                if (compilerOptions.emitDecoratorMetadata) {
-                    writeLines(metadataHelper);
+            else {
+                const seenPrologueDirectives = createMap<String>();
+                for (const sourceFile of (sourceFileOrBundle as Bundle).sourceFiles) {
+                    setSourceFile(sourceFile);
+                    emitPrologueDirectives(sourceFile.statements, /*startWithNewLine*/ true, seenPrologueDirectives);
                 }
-
-                decorateEmitted = true;
-                helpersEmitted = true;
-            }
-
-            if (!paramEmitted && node.flags & NodeFlags.HasParamDecorators) {
-                writeLines(paramHelper);
-                paramEmitted = true;
-                helpersEmitted = true;
             }
+        }
 
-            if (!awaiterEmitted && node.flags & NodeFlags.HasAsyncFunctions) {
-                writeLines(awaiterHelper);
-                if (languageVersion < ScriptTarget.ES6) {
-                    writeLines(generatorHelper);
+        function emitShebangIfNeeded(sourceFileOrBundle: Bundle | SourceFile) {
+            if (isSourceFile(sourceFileOrBundle)) {
+                const shebang = getShebang(sourceFileOrBundle.text);
+                if (shebang) {
+                    write(shebang);
+                    writeLine();
+                    return true;
                 }
-
-                awaiterEmitted = true;
-                helpersEmitted = true;
-            }
-
-            if (helpersEmitted) {
-                writeLine();
             }
-
-            return helpersEmitted;
-        }
-
-        function writeLines(text: string): void {
-            const lines = text.split(/\r\n|\r|\n/g);
-            for (let i = 0; i < lines.length; i++) {
-                const line = lines[i];
-                if (line.length) {
-                    if (i > 0) {
-                        writeLine();
+            else {
+                for (const sourceFile of sourceFileOrBundle.sourceFiles) {
+                    // Emit only the first encountered shebang
+                    if (emitShebangIfNeeded(sourceFile)) {
+                        break;
                     }
-                    write(line);
                 }
             }
         }
@@ -2226,14 +2289,6 @@ const _super = (function (geti, seti) {
         // Helpers
         //
 
-        function emitShebang() {
-            const shebang = getShebang(currentText);
-            if (shebang) {
-                write(shebang);
-                writeLine();
-            }
-        }
-
         function emitModifiers(node: Node, modifiers: NodeArray<Modifier>) {
             if (modifiers && modifiers.length) {
                 emitList(node, modifiers, ListFormat.Modifiers);
@@ -2263,8 +2318,8 @@ const _super = (function (geti, seti) {
             }
         }
 
-        function emitEmbeddedStatement(node: Statement) {
-            if (isBlock(node)) {
+        function emitEmbeddedStatement(parent: Node, node: Statement) {
+            if (isBlock(node) || getEmitFlags(parent) & EmitFlags.SingleLine) {
                 write(" ");
                 emit(node);
             }
@@ -2292,11 +2347,25 @@ const _super = (function (geti, seti) {
             emitList(parentNode, parameters, ListFormat.Parameters);
         }
 
-        function emitParametersForArrow(parentNode: Node, parameters: NodeArray<ParameterDeclaration>) {
-            if (parameters &&
-                parameters.length === 1 &&
-                parameters[0].type === undefined &&
-                parameters[0].pos === parentNode.pos) {
+        function canEmitSimpleArrowHead(parentNode: FunctionTypeNode | ArrowFunction, parameters: NodeArray<ParameterDeclaration>) {
+            const parameter = singleOrUndefined(parameters);
+            return parameter
+                && parameter.pos === parentNode.pos // may not have parsed tokens between parent and parameter
+                && !(isArrowFunction(parentNode) && parentNode.type) // arrow function may not have return type annotation
+                && !some(parentNode.decorators)     // parent may not have decorators
+                && !some(parentNode.modifiers)      // parent may not have modifiers
+                && !some(parentNode.typeParameters) // parent may not have type parameters
+                && !some(parameter.decorators)      // parameter may not have decorators
+                && !some(parameter.modifiers)       // parameter may not have modifiers
+                && !parameter.dotDotDotToken        // parameter may not be rest
+                && !parameter.questionToken         // parameter may not be optional
+                && !parameter.type                  // parameter may not have a type annotation
+                && !parameter.initializer           // parameter may not have an initializer
+                && isIdentifier(parameter.name);    // parameter name must be identifier
+        }
+
+        function emitParametersForArrow(parentNode: FunctionTypeNode | ArrowFunction, parameters: NodeArray<ParameterDeclaration>) {
+            if (canEmitSimpleArrowHead(parentNode, parameters)) {
                 emit(parameters[0]);
             }
             else {
@@ -2331,6 +2400,10 @@ const _super = (function (geti, seti) {
                 write(getOpeningBracket(format));
             }
 
+            if (onBeforeEmitNodeArray) {
+                onBeforeEmitNodeArray(children);
+            }
+
             if (isEmpty) {
                 // Write a line terminator if the parent node was multi-line
                 if (format & ListFormat.MultiLine) {
@@ -2366,6 +2439,15 @@ const _super = (function (geti, seti) {
 
                     // Write the delimiter if this is not the first node.
                     if (previousSibling) {
+                        // i.e
+                        //      function commentedParameters(
+                        //          /* Parameter a */
+                        //          a
+                        //          /* End of parameter a */ -> this comment isn't considered to be trailing comment of parameter "a" due to newline
+                        //          ,
+                        if (delimiter && previousSibling.end !== parentNode.end) {
+                            emitLeadingCommentsOfPosition(previousSibling.end);
+                        }
                         write(delimiter);
 
                         // Write either a line terminator or whitespace to separate the elements.
@@ -2385,15 +2467,17 @@ const _super = (function (geti, seti) {
                         }
                     }
 
+                    // Emit this child.
                     if (shouldEmitInterveningComments) {
-                        const commentRange = getCommentRange(child);
-                        emitTrailingCommentsOfPosition(commentRange.pos);
+                        if (emitTrailingCommentsOfPosition) {
+                            const commentRange = getCommentRange(child);
+                            emitTrailingCommentsOfPosition(commentRange.pos);
+                        }
                     }
                     else {
                         shouldEmitInterveningComments = mayEmitInterveningComments;
                     }
 
-                    // Emit this child.
                     emit(child);
 
                     if (shouldDecreaseIndentAfterEmit) {
@@ -2410,6 +2494,17 @@ const _super = (function (geti, seti) {
                     write(",");
                 }
 
+
+                // Emit any trailing comment of the last element in the list
+                // i.e
+                //       var array = [...
+                //          2
+                //          /* end of element 2 */
+                //       ];
+                if (previousSibling && delimiter && previousSibling.end !== parentNode.end) {
+                    emitLeadingCommentsOfPosition(previousSibling.end);
+                }
+
                 // Decrease the indent, if requested.
                 if (format & ListFormat.Indented) {
                     decreaseIndent();
@@ -2424,25 +2519,57 @@ const _super = (function (geti, seti) {
                 }
             }
 
+            if (onAfterEmitNodeArray) {
+                onAfterEmitNodeArray(children);
+            }
+
             if (format & ListFormat.BracketsMask) {
                 write(getClosingBracket(format));
             }
         }
 
+        function write(s: string) {
+            writer.write(s);
+        }
+
+        function writeLine() {
+            writer.writeLine();
+        }
+
+        function increaseIndent() {
+            writer.increaseIndent();
+        }
+
+        function decreaseIndent() {
+            writer.decreaseIndent();
+        }
+
         function writeIfAny(nodes: NodeArray<Node>, text: string) {
-            if (nodes && nodes.length > 0) {
+            if (some(nodes)) {
                 write(text);
             }
         }
 
         function writeIfPresent(node: Node, text: string) {
-            if (node !== undefined) {
+            if (node) {
                 write(text);
             }
         }
 
         function writeToken(token: SyntaxKind, pos: number, contextNode?: Node) {
-            return emitTokenWithSourceMap(contextNode, token, pos, writeTokenText);
+            return onEmitSourceMapOfToken
+                ? onEmitSourceMapOfToken(contextNode, token, pos, writeTokenText)
+                : writeTokenText(token, pos);
+        }
+
+        function writeTokenNode(node: Node) {
+            if (onBeforeEmitToken) {
+                onBeforeEmitToken(node);
+            }
+            writeTokenText(node.kind);
+            if (onAfterEmitToken) {
+                onAfterEmitToken(node);
+            }
         }
 
         function writeTokenText(token: SyntaxKind, pos?: number) {
@@ -2451,6 +2578,43 @@ const _super = (function (geti, seti) {
             return pos < 0 ? pos : pos + tokenString.length;
         }
 
+        function writeLineOrSpace(node: Node) {
+            if (getEmitFlags(node) & EmitFlags.SingleLine) {
+                write(" ");
+            }
+            else {
+                writeLine();
+            }
+        }
+
+        function writeLines(text: string): void {
+            const lines = text.split(/\r\n?|\n/g);
+            const indentation = guessIndentation(lines);
+            for (let i = 0; i < lines.length; i++) {
+                const line = indentation ? lines[i].slice(indentation) : lines[i];
+                if (line.length) {
+                    writeLine();
+                    write(line);
+                    writeLine();
+                }
+            }
+        }
+
+        function guessIndentation(lines: string[]) {
+            let indentation: number;
+            for (const line of lines) {
+                for (let i = 0; i < line.length && (indentation === undefined || i < indentation); i++) {
+                    if (!isWhiteSpaceLike(line.charCodeAt(i))) {
+                        if (indentation === undefined || i < indentation) {
+                            indentation = i;
+                            break;
+                        }
+                    }
+                }
+            }
+            return indentation;
+        }
+
         function increaseIndentIf(value: boolean, valueToWriteWhenNotIndenting?: string) {
             if (value) {
                 increaseIndent();
@@ -2574,6 +2738,16 @@ const _super = (function (geti, seti) {
                 && !rangeEndIsOnSameLineAsRangeStart(node1, node2, currentSourceFile);
         }
 
+        function isSingleLineEmptyBlock(block: Block) {
+            return !block.multiLine
+                && isEmptyBlock(block);
+        }
+
+        function isEmptyBlock(block: BlockLike) {
+            return block.statements.length === 0
+                && rangeEndIsOnSameLineAsRangeStart(block, block, currentSourceFile);
+        }
+
         function skipSynthesizedParentheses(node: Node) {
             while (node.kind === SyntaxKind.ParenthesizedExpression && nodeIsSynthesized(node)) {
                 node = (<ParenthesizedExpression>node).expression;
@@ -2584,7 +2758,7 @@ const _super = (function (geti, seti) {
 
         function getTextOfNode(node: Node, includeTrivia?: boolean): string {
             if (isGeneratedIdentifier(node)) {
-                return getGeneratedIdentifier(<Identifier>node);
+                return generateName(node);
             }
             else if (isIdentifier(node) && (nodeIsSynthesized(node) || !node.parent)) {
                 return unescapeIdentifier(node.text);
@@ -2603,33 +2777,75 @@ const _super = (function (geti, seti) {
             if (node.kind === SyntaxKind.StringLiteral && (<StringLiteral>node).textSourceNode) {
                 const textSourceNode = (<StringLiteral>node).textSourceNode;
                 if (isIdentifier(textSourceNode)) {
-                    return "\"" + escapeNonAsciiCharacters(escapeString(getTextOfNode(textSourceNode))) + "\"";
+                    return getEmitFlags(node) & EmitFlags.NoAsciiEscaping ?
+                        `"${escapeString(getTextOfNode(textSourceNode))}"` :
+                        `"${escapeNonAsciiString(getTextOfNode(textSourceNode))}"`;
                 }
                 else {
                     return getLiteralTextOfNode(textSourceNode);
                 }
             }
 
-            return getLiteralText(node, currentSourceFile, languageVersion);
+            return getLiteralText(node, currentSourceFile);
         }
 
-        function isSingleLineEmptyBlock(block: Block) {
-            return !block.multiLine
-                && block.statements.length === 0
-                && rangeEndIsOnSameLineAsRangeStart(block, block, currentSourceFile);
+        /**
+         * Push a new name generation scope.
+         */
+        function pushNameGenerationScope() {
+            tempFlagsStack.push(tempFlags);
+            tempFlags = 0;
+        }
+
+        /**
+         * Pop the current name generation scope.
+         */
+        function popNameGenerationScope() {
+            tempFlags = tempFlagsStack.pop();
+        }
+
+        /**
+         * Generate the text for a generated identifier.
+         */
+        function generateName(name: GeneratedIdentifier) {
+            if (name.autoGenerateKind === GeneratedIdentifierKind.Node) {
+                // Node names generate unique names based on their original node
+                // and are cached based on that node's id.
+                const node = getNodeForGeneratedName(name);
+                return generateNameCached(node);
+            }
+            else {
+                // Auto, Loop, and Unique names are cached based on their unique
+                // autoGenerateId.
+                const autoGenerateId = name.autoGenerateId;
+                return autoGeneratedIdToGeneratedName[autoGenerateId] || (autoGeneratedIdToGeneratedName[autoGenerateId] = unescapeIdentifier(makeName(name)));
+            }
         }
 
+        function generateNameCached(node: Node) {
+            const nodeId = getNodeId(node);
+            return nodeIdToGeneratedName[nodeId] || (nodeIdToGeneratedName[nodeId] = unescapeIdentifier(generateNameForNode(node)));
+        }
+
+        /**
+         * Returns a value indicating whether a name is unique globally, within the current file,
+         * or within the NameGenerator.
+         */
         function isUniqueName(name: string): boolean {
-            return !resolver.hasGlobalName(name) &&
-                !hasProperty(currentFileIdentifiers, name) &&
-                !hasProperty(generatedNameSet, name);
+            return !(hasGlobalName && hasGlobalName(name))
+                && !currentSourceFile.identifiers.has(name)
+                && !generatedNames.has(name);
         }
 
+        /**
+         * Returns a value indicating whether a name is unique within a container.
+         */
         function isUniqueLocalName(name: string, container: Node): boolean {
             for (let node = container; isNodeDescendantOf(node, container); node = node.nextContainer) {
-                if (node.locals && hasProperty(node.locals, name)) {
+                if (node.locals) {
+                    const local = node.locals.get(name);
                     // We conservatively include alias symbols to cover cases where they're emitted as locals
-                    if (node.locals[name].flags & (SymbolFlags.Value | SymbolFlags.ExportValue | SymbolFlags.Alias)) {
+                    if (local && local.flags & (SymbolFlags.Value | SymbolFlags.ExportValue | SymbolFlags.Alias)) {
                         return false;
                     }
                 }
@@ -2638,10 +2854,10 @@ const _super = (function (geti, seti) {
         }
 
         /**
-        * Return the next available name in the pattern _a ... _z, _0, _1, ...
-        * TempFlags._i or TempFlags._n may be used to express a preference for that dedicated name.
-        * Note that names generated by makeTempVariableName and makeUniqueName will never conflict.
-        */
+         * Return the next available name in the pattern _a ... _z, _0, _1, ...
+         * TempFlags._i or TempFlags._n may be used to express a preference for that dedicated name.
+         * Note that names generated by makeTempVariableName and makeUniqueName will never conflict.
+         */
         function makeTempVariableName(flags: TempFlags): string {
             if (flags && !(tempFlags & flags)) {
                 const name = flags === TempFlags._i ? "_i" : "_n";
@@ -2665,10 +2881,12 @@ const _super = (function (geti, seti) {
             }
         }
 
-        // Generate a name that is unique within the current file and doesn't conflict with any names
-        // in global scope. The name is formed by adding an '_n' suffix to the specified base name,
-        // where n is a positive integer. Note that names generated by makeTempVariableName and
-        // makeUniqueName are guaranteed to never conflict.
+        /**
+         * Generate a name that is unique within the current file and doesn't conflict with any names
+         * in global scope. The name is formed by adding an '_n' suffix to the specified base name,
+         * where n is a positive integer. Note that names generated by makeTempVariableName and
+         * makeUniqueName are guaranteed to never conflict.
+         */
         function makeUniqueName(baseName: string): string {
             // Find the first unique 'name_n', where n is a positive number
             if (baseName.charCodeAt(baseName.length - 1) !== CharacterCodes._) {
@@ -2678,18 +2896,25 @@ const _super = (function (geti, seti) {
             while (true) {
                 const generatedName = baseName + i;
                 if (isUniqueName(generatedName)) {
-                    return generatedNameSet[generatedName] = generatedName;
+                    generatedNames.set(generatedName, generatedName);
+                    return generatedName;
                 }
                 i++;
             }
         }
 
+        /**
+         * Generates a unique name for a ModuleDeclaration or EnumDeclaration.
+         */
         function generateNameForModuleOrEnum(node: ModuleDeclaration | EnumDeclaration) {
             const name = getTextOfNode(node.name);
             // Use module/enum name itself if it is unique, otherwise make a unique variation
             return isUniqueLocalName(name, node) ? name : makeUniqueName(name);
         }
 
+        /**
+         * Generates a unique name for an ImportDeclaration or ExportDeclaration.
+         */
         function generateNameForImportOrExportDeclaration(node: ImportDeclaration | ExportDeclaration) {
             const expr = getExternalModuleName(node);
             const baseName = expr.kind === SyntaxKind.StringLiteral ?
@@ -2697,18 +2922,29 @@ const _super = (function (geti, seti) {
             return makeUniqueName(baseName);
         }
 
+        /**
+         * Generates a unique name for a default export.
+         */
         function generateNameForExportDefault() {
             return makeUniqueName("default");
         }
 
+        /**
+         * Generates a unique name for a class expression.
+         */
         function generateNameForClassExpression() {
             return makeUniqueName("class");
         }
 
+        function generateNameForMethodOrAccessor(node: MethodDeclaration | AccessorDeclaration) {
+            if (isIdentifier(node.name)) {
+                return generateNameCached(node.name);
+            }
+            return makeTempVariableName(TempFlags.Auto);
+        }
+
         /**
          * Generates a unique name from a node.
-         *
-         * @param node A node.
          */
         function generateNameForNode(node: Node): string {
             switch (node.kind) {
@@ -2726,6 +2962,10 @@ const _super = (function (geti, seti) {
                     return generateNameForExportDefault();
                 case SyntaxKind.ClassExpression:
                     return generateNameForClassExpression();
+                case SyntaxKind.MethodDeclaration:
+                case SyntaxKind.GetAccessor:
+                case SyntaxKind.SetAccessor:
+                    return generateNameForMethodOrAccessor(<MethodDeclaration | AccessorDeclaration>node);
                 default:
                     return makeTempVariableName(TempFlags.Auto);
             }
@@ -2733,17 +2973,15 @@ const _super = (function (geti, seti) {
 
         /**
          * Generates a unique identifier for a node.
-         *
-         * @param name A generated name.
          */
-        function generateName(name: Identifier) {
+        function makeName(name: GeneratedIdentifier) {
             switch (name.autoGenerateKind) {
                 case GeneratedIdentifierKind.Auto:
                     return makeTempVariableName(TempFlags.Auto);
                 case GeneratedIdentifierKind.Loop:
                     return makeTempVariableName(TempFlags._i);
                 case GeneratedIdentifierKind.Unique:
-                    return makeUniqueName(name.text);
+                    return makeUniqueName(unescapeIdentifier(name.text));
             }
 
             Debug.fail("Unsupported GeneratedIdentifierKind.");
@@ -2751,10 +2989,8 @@ const _super = (function (geti, seti) {
 
         /**
          * Gets the node from which a name should be generated.
-         *
-         * @param name A generated name wrapper.
          */
-        function getNodeForGeneratedName(name: Identifier) {
+        function getNodeForGeneratedName(name: GeneratedIdentifier) {
             const autoGenerateId = name.autoGenerateId;
             let node = name as Node;
             let original = node.original;
@@ -2775,57 +3011,43 @@ const _super = (function (geti, seti) {
             // otherwise, return the original node for the source;
             return node;
         }
+    }
 
-        /**
-         * Gets the generated identifier text from a generated identifier.
-         *
-         * @param name The generated identifier.
-         */
-        function getGeneratedIdentifier(name: Identifier) {
-            if (name.autoGenerateKind === GeneratedIdentifierKind.Node) {
-                // Generated names generate unique names based on their original node
-                // and are cached based on that node's id
-                const node = getNodeForGeneratedName(name);
-                const nodeId = getNodeId(node);
-                return nodeIdToGeneratedName[nodeId] || (nodeIdToGeneratedName[nodeId] = unescapeIdentifier(generateNameForNode(node)));
-            }
-            else {
-                // Auto, Loop, and Unique names are cached based on their unique
-                // autoGenerateId.
-                const autoGenerateId = name.autoGenerateId;
-                return autoGeneratedIdToGeneratedName[autoGenerateId] || (autoGeneratedIdToGeneratedName[autoGenerateId] = unescapeIdentifier(generateName(name)));
-            }
-        }
+    function createDelimiterMap() {
+        const delimiters: string[] = [];
+        delimiters[ListFormat.None] = "";
+        delimiters[ListFormat.CommaDelimited] = ",";
+        delimiters[ListFormat.BarDelimited] = " |";
+        delimiters[ListFormat.AmpersandDelimited] = " &";
+        return delimiters;
+    }
 
-        function createDelimiterMap() {
-            const delimiters: string[] = [];
-            delimiters[ListFormat.None] = "";
-            delimiters[ListFormat.CommaDelimited] = ",";
-            delimiters[ListFormat.BarDelimited] = " |";
-            delimiters[ListFormat.AmpersandDelimited] = " &";
-            return delimiters;
-        }
+    function getDelimiter(format: ListFormat) {
+        return delimiters[format & ListFormat.DelimitersMask];
+    }
 
-        function getDelimiter(format: ListFormat) {
-            return delimiters[format & ListFormat.DelimitersMask];
-        }
+    function createBracketsMap() {
+        const brackets: string[][] = [];
+        brackets[ListFormat.Braces] = ["{", "}"];
+        brackets[ListFormat.Parenthesis] = ["(", ")"];
+        brackets[ListFormat.AngleBrackets] = ["<", ">"];
+        brackets[ListFormat.SquareBrackets] = ["[", "]"];
+        return brackets;
+    }
 
-        function createBracketsMap() {
-            const brackets: string[][] = [];
-            brackets[ListFormat.Braces] = ["{", "}"];
-            brackets[ListFormat.Parenthesis] = ["(", ")"];
-            brackets[ListFormat.AngleBrackets] = ["<", ">"];
-            brackets[ListFormat.SquareBrackets] = ["[", "]"];
-            return brackets;
-        }
+    function getOpeningBracket(format: ListFormat) {
+        return brackets[format & ListFormat.BracketsMask][0];
+    }
 
-        function getOpeningBracket(format: ListFormat) {
-            return brackets[format & ListFormat.BracketsMask][0];
-        }
+    function getClosingBracket(format: ListFormat) {
+        return brackets[format & ListFormat.BracketsMask][1];
+    }
 
-        function getClosingBracket(format: ListFormat) {
-            return brackets[format & ListFormat.BracketsMask][1];
-        }
+    // Flags enum to track count of temp variables and a few dedicated names
+    const enum TempFlags {
+        Auto = 0x00000000,  // No preferred name
+        CountMask = 0x0FFFFFFF,  // Temp variable counter
+        _i = 0x10000000,  // Use/preference flag for '_i'
     }
 
     const enum ListFormat {
@@ -2852,7 +3074,7 @@ const _super = (function (geti, seti) {
         SpaceBetweenSiblings = 1 << 8,  // Inserts a space between each sibling node.
 
         // Brackets/Braces
-        Braces = 1 << 9,                 // The list is surrounded by "{" and "}".
+        Braces = 1 << 9,                // The list is surrounded by "{" and "}".
         Parenthesis = 1 << 10,          // The list is surrounded by "(" and ")".
         AngleBrackets = 1 << 11,        // The list is surrounded by "<" and ">".
         SquareBrackets = 1 << 12,       // The list is surrounded by "[" and "]".
@@ -2868,9 +3090,11 @@ const _super = (function (geti, seti) {
         NoInterveningComments = 1 << 17, // Do not emit comments between each node
 
         // Precomputed Formats
-        Modifiers = SingleLine | SpaceBetweenSiblings,
+        Modifiers = SingleLine | SpaceBetweenSiblings | NoInterveningComments,
         HeritageClauses = SingleLine | SpaceBetweenSiblings,
-        TypeLiteralMembers = MultiLine | Indented,
+        SingleLineTypeLiteralMembers = SingleLine | SpaceBetweenBraces | SpaceBetweenSiblings | Indented,
+        MultiLineTypeLiteralMembers = MultiLine | Indented,
+
         TupleTypeElements = CommaDelimited | SpaceBetweenSiblings | SingleLine | Indented,
         UnionTypeConstituents = BarDelimited | SpaceBetweenSiblings | SingleLine,
         IntersectionTypeConstituents = AmpersandDelimited | SpaceBetweenSiblings | SingleLine,
@@ -2878,6 +3102,7 @@ const _super = (function (geti, seti) {
         ArrayBindingPatternElements = SingleLine | AllowTrailingComma | CommaDelimited | SpaceBetweenSiblings,
         ObjectLiteralExpressionProperties = PreserveLines | CommaDelimited | SpaceBetweenSiblings | SpaceBetweenBraces | Indented | Braces,
         ArrayLiteralExpressionElements = PreserveLines | CommaDelimited | SpaceBetweenSiblings | AllowTrailingComma | Indented | SquareBrackets,
+        CommaListElements = CommaDelimited | SpaceBetweenSiblings | SingleLine,
         CallExpressionArguments = CommaDelimited | SpaceBetweenSiblings | SingleLine | Parenthesis,
         NewExpressionArguments = CommaDelimited | SpaceBetweenSiblings | SingleLine | Parenthesis | OptionalIfUndefined,
         TemplateExpressionSpans = SingleLine | NoInterveningComments,
diff --git a/src/compiler/factory.ts b/src/compiler/factory.ts
index d873c3e..ed3ed36 100644
--- a/src/compiler/factory.ts
+++ b/src/compiler/factory.ts
@@ -1,28 +1,18 @@
 /// <reference path="core.ts"/>
 /// <reference path="utilities.ts"/>
 
-/* @internal */
 namespace ts {
-    let NodeConstructor: new (kind: SyntaxKind, pos: number, end: number) => Node;
-    let SourceFileConstructor: new (kind: SyntaxKind, pos: number, end: number) => Node;
-
-    function createNode(kind: SyntaxKind, location?: TextRange, flags?: NodeFlags): Node {
-        const ConstructorForKind = kind === SyntaxKind.SourceFile
-            ? (SourceFileConstructor || (SourceFileConstructor = objectAllocator.getSourceFileConstructor()))
-            : (NodeConstructor || (NodeConstructor = objectAllocator.getNodeConstructor()));
-
-        const node = location
-            ? new ConstructorForKind(kind, location.pos, location.end)
-            : new ConstructorForKind(kind, /*pos*/ -1, /*end*/ -1);
-
-        node.flags = flags | NodeFlags.Synthesized;
-
+    function createSynthesizedNode(kind: SyntaxKind): Node {
+        const node = createNode(kind, -1, -1);
+        node.flags |= NodeFlags.Synthesized;
         return node;
     }
 
+    /* @internal */
     export function updateNode<T extends Node>(updated: T, original: T): T {
         if (updated !== original) {
             setOriginalNode(updated, original);
+            setTextRange(updated, original);
             if (original.startsOnNewLine) {
                 updated.startsOnNewLine = true;
             }
@@ -31,7 +21,10 @@ namespace ts {
         return updated;
     }
 
-    export function createNodeArray<T extends Node>(elements?: T[], location?: TextRange, hasTrailingComma?: boolean): NodeArray<T> {
+    /**
+     * Make `elements` into a `NodeArray<T>`. If `elements` is `undefined`, returns an empty `NodeArray<T>`.
+     */
+    export function createNodeArray<T extends Node>(elements?: T[], hasTrailingComma?: boolean): NodeArray<T> {
         if (elements) {
             if (isNodeArray(elements)) {
                 return elements;
@@ -42,40 +35,22 @@ namespace ts {
         }
 
         const array = <NodeArray<T>>elements;
-        if (location) {
-            array.pos = location.pos;
-            array.end = location.end;
-        }
-        else {
-            array.pos = -1;
-            array.end = -1;
-        }
-
-        if (hasTrailingComma) {
-            array.hasTrailingComma = true;
-        }
-
+        array.pos = -1;
+        array.end = -1;
+        array.hasTrailingComma = hasTrailingComma;
         return array;
     }
 
-    export function createSynthesizedNode(kind: SyntaxKind, startsOnNewLine?: boolean): Node {
-        const node = createNode(kind, /*location*/ undefined);
-        node.startsOnNewLine = startsOnNewLine;
-        return node;
-    }
-
-    export function createSynthesizedNodeArray<T extends Node>(elements?: T[]): NodeArray<T> {
-        return createNodeArray(elements, /*location*/ undefined);
-    }
-
     /**
      * Creates a shallow, memberwise clone of a node with no source map location.
      */
-    export function getSynthesizedClone<T extends Node>(node: T): T {
+    /* @internal */
+    export function getSynthesizedClone<T extends Node>(node: T | undefined): T {
         // We don't use "clone" from core.ts here, as we need to preserve the prototype chain of
         // the original node. We also need to exclude specific properties and only include own-
         // properties (to skip members already defined on the shared prototype).
-        const clone = <T>createNode(node.kind, /*location*/ undefined, node.flags);
+        const clone = <T>createSynthesizedNode(node.kind);
+        clone.flags |= node.flags;
         setOriginalNode(clone, node);
 
         for (const key in node) {
@@ -89,62 +64,75 @@ namespace ts {
         return clone;
     }
 
-    /**
-     * Creates a shallow, memberwise clone of a node for mutation.
-     */
-    export function getMutableClone<T extends Node>(node: T): T {
-        const clone = getSynthesizedClone(node);
-        clone.pos = node.pos;
-        clone.end = node.end;
-        clone.parent = node.parent;
-        return clone;
-    }
-
     // Literals
 
-    export function createLiteral(textSource: StringLiteral | Identifier, location?: TextRange): StringLiteral;
-    export function createLiteral(value: string, location?: TextRange): StringLiteral;
-    export function createLiteral(value: number, location?: TextRange): NumericLiteral;
-    export function createLiteral(value: string | number | boolean, location?: TextRange): PrimaryExpression;
-    export function createLiteral(value: string | number | boolean | StringLiteral | Identifier, location?: TextRange): PrimaryExpression {
+    export function createLiteral(value: string): StringLiteral;
+    export function createLiteral(value: number): NumericLiteral;
+    export function createLiteral(value: boolean): BooleanLiteral;
+    /** Create a string literal whose source text is read from a source node during emit. */
+    export function createLiteral(sourceNode: StringLiteral | NumericLiteral | Identifier): StringLiteral;
+    export function createLiteral(value: string | number | boolean): PrimaryExpression;
+    export function createLiteral(value: string | number | boolean | StringLiteral | NumericLiteral | Identifier): PrimaryExpression {
         if (typeof value === "number") {
-            const node = <LiteralExpression>createNode(SyntaxKind.NumericLiteral, location, /*flags*/ undefined);
-            node.text = value.toString();
-            return node;
-        }
-        else if (typeof value === "boolean") {
-            return <PrimaryExpression>createNode(value ? SyntaxKind.TrueKeyword : SyntaxKind.FalseKeyword, location, /*flags*/ undefined);
+            return createNumericLiteral(value + "");
         }
-        else if (typeof value === "string") {
-            const node = <StringLiteral>createNode(SyntaxKind.StringLiteral, location, /*flags*/ undefined);
-            node.text = value;
-            return node;
+        if (typeof value === "boolean") {
+            return value ? createTrue() : createFalse();
         }
-        else {
-            const node = <StringLiteral>createNode(SyntaxKind.StringLiteral, location, /*flags*/ undefined);
-            node.textSourceNode = value;
-            node.text = value.text;
-            return node;
+        if (typeof value === "string") {
+            return createStringLiteral(value);
         }
+        return createLiteralFromNode(value);
     }
 
-    // Identifiers
+    export function createNumericLiteral(value: string): NumericLiteral {
+        const node = <NumericLiteral>createSynthesizedNode(SyntaxKind.NumericLiteral);
+        node.text = value;
+        node.numericLiteralFlags = 0;
+        return node;
+    }
 
-    let nextAutoGenerateId = 0;
+    function createStringLiteral(text: string): StringLiteral {
+        const node = <StringLiteral>createSynthesizedNode(SyntaxKind.StringLiteral);
+        node.text = text;
+        return node;
+    }
+
+    function createLiteralFromNode(sourceNode: StringLiteral | NumericLiteral | Identifier): StringLiteral {
+        const node = createStringLiteral(sourceNode.text);
+        node.textSourceNode = sourceNode;
+        return node;
+    }
 
-    export function createIdentifier(text: string, location?: TextRange): Identifier {
-        const node = <Identifier>createNode(SyntaxKind.Identifier, location);
+
+    // Identifiers
+
+    export function createIdentifier(text: string): Identifier;
+    /* @internal */
+    export function createIdentifier(text: string, typeArguments: TypeNode[]): Identifier;
+    export function createIdentifier(text: string, typeArguments?: TypeNode[]): Identifier {
+        const node = <Identifier>createSynthesizedNode(SyntaxKind.Identifier);
         node.text = escapeIdentifier(text);
-        node.originalKeywordKind = stringToToken(text);
+        node.originalKeywordKind = text ? stringToToken(text) : SyntaxKind.Unknown;
         node.autoGenerateKind = GeneratedIdentifierKind.None;
         node.autoGenerateId = 0;
+        if (typeArguments) {
+            node.typeArguments = createNodeArray(typeArguments);
+        }
         return node;
     }
 
-    export function createTempVariable(recordTempVariable: ((node: Identifier) => void) | undefined, location?: TextRange): Identifier {
-        const name = <Identifier>createNode(SyntaxKind.Identifier, location);
-        name.text = "";
-        name.originalKeywordKind = SyntaxKind.Unknown;
+    export function updateIdentifier(node: Identifier, typeArguments: NodeArray<TypeNode> | undefined): Identifier {
+        return node.typeArguments !== typeArguments
+        ? updateNode(createIdentifier(node.text, typeArguments), node)
+        : node;
+    }
+
+    let nextAutoGenerateId = 0;
+
+    /** Create a unique temporary variable. */
+    export function createTempVariable(recordTempVariable: ((node: Identifier) => void) | undefined): Identifier {
+        const name = createIdentifier("");
         name.autoGenerateKind = GeneratedIdentifierKind.Auto;
         name.autoGenerateId = nextAutoGenerateId;
         nextAutoGenerateId++;
@@ -154,154 +142,236 @@ namespace ts {
         return name;
     }
 
-    export function createLoopVariable(location?: TextRange): Identifier {
-        const name = <Identifier>createNode(SyntaxKind.Identifier, location);
-        name.text = "";
-        name.originalKeywordKind = SyntaxKind.Unknown;
+    /** Create a unique temporary variable for use in a loop. */
+    export function createLoopVariable(): Identifier {
+        const name = createIdentifier("");
         name.autoGenerateKind = GeneratedIdentifierKind.Loop;
         name.autoGenerateId = nextAutoGenerateId;
         nextAutoGenerateId++;
         return name;
     }
 
-    export function createUniqueName(text: string, location?: TextRange): Identifier {
-        const name = <Identifier>createNode(SyntaxKind.Identifier, location);
-        name.text = text;
-        name.originalKeywordKind = SyntaxKind.Unknown;
+    /** Create a unique name based on the supplied text. */
+    export function createUniqueName(text: string): Identifier {
+        const name = createIdentifier(text);
         name.autoGenerateKind = GeneratedIdentifierKind.Unique;
         name.autoGenerateId = nextAutoGenerateId;
         nextAutoGenerateId++;
         return name;
     }
 
-    export function getGeneratedNameForNode(node: Node, location?: TextRange): Identifier {
-        const name = <Identifier>createNode(SyntaxKind.Identifier, location);
-        name.original = node;
-        name.text = "";
-        name.originalKeywordKind = SyntaxKind.Unknown;
+    /** Create a unique name generated for a node. */
+    export function getGeneratedNameForNode(node: Node): Identifier {
+        const name = createIdentifier("");
         name.autoGenerateKind = GeneratedIdentifierKind.Node;
         name.autoGenerateId = nextAutoGenerateId;
+        name.original = node;
         nextAutoGenerateId++;
         return name;
     }
 
     // Punctuation
 
-    export function createToken(token: SyntaxKind) {
-        return createNode(token);
+    export function createToken<TKind extends SyntaxKind>(token: TKind) {
+        return <Token<TKind>>createSynthesizedNode(token);
     }
 
     // Reserved words
 
     export function createSuper() {
-        const node = <PrimaryExpression>createNode(SyntaxKind.SuperKeyword);
-        return node;
+        return <SuperExpression>createSynthesizedNode(SyntaxKind.SuperKeyword);
     }
 
-    export function createThis(location?: TextRange) {
-        const node = <PrimaryExpression>createNode(SyntaxKind.ThisKeyword, location);
-        return node;
+    export function createThis() {
+        return <ThisExpression & Token<SyntaxKind.ThisKeyword>>createSynthesizedNode(SyntaxKind.ThisKeyword);
     }
 
     export function createNull() {
-        const node = <PrimaryExpression>createNode(SyntaxKind.NullKeyword);
-        return node;
+        return <NullLiteral & Token<SyntaxKind.NullKeyword>>createSynthesizedNode(SyntaxKind.NullKeyword);
+    }
+
+    export function createTrue() {
+        return <BooleanLiteral & Token<SyntaxKind.TrueKeyword>>createSynthesizedNode(SyntaxKind.TrueKeyword);
+    }
+
+    export function createFalse() {
+        return <BooleanLiteral & Token<SyntaxKind.FalseKeyword>>createSynthesizedNode(SyntaxKind.FalseKeyword);
     }
 
     // Names
 
-    export function createComputedPropertyName(expression: Expression, location?: TextRange) {
-        const node = <ComputedPropertyName>createNode(SyntaxKind.ComputedPropertyName, location);
+    export function createQualifiedName(left: EntityName, right: string | Identifier) {
+        const node = <QualifiedName>createSynthesizedNode(SyntaxKind.QualifiedName);
+        node.left = left;
+        node.right = asName(right);
+        return node;
+    }
+
+    export function updateQualifiedName(node: QualifiedName, left: EntityName, right: Identifier) {
+        return node.left !== left
+            || node.right !== right
+            ? updateNode(createQualifiedName(left, right), node)
+            : node;
+    }
+
+    export function createComputedPropertyName(expression: Expression) {
+        const node = <ComputedPropertyName>createSynthesizedNode(SyntaxKind.ComputedPropertyName);
         node.expression = expression;
         return node;
     }
 
     export function updateComputedPropertyName(node: ComputedPropertyName, expression: Expression) {
-        if (node.expression !== expression) {
-            return updateNode(createComputedPropertyName(expression, node), node);
-        }
-        return node;
+        return node.expression !== expression
+            ? updateNode(createComputedPropertyName(expression), node)
+            : node;
     }
 
     // Signature elements
 
-    export function createParameter(name: string | Identifier | BindingPattern, initializer?: Expression, location?: TextRange) {
-        return createParameterDeclaration(
-            /*decorators*/ undefined,
-            /*modifiers*/ undefined,
-            /*dotDotDotToken*/ undefined,
-            name,
-            /*questionToken*/ undefined,
-            /*type*/ undefined,
-            initializer,
-            location
-        );
+    export function createTypeParameterDeclaration(name: string | Identifier, constraint?: TypeNode, defaultType?: TypeNode) {
+        const node = createSynthesizedNode(SyntaxKind.TypeParameter) as TypeParameterDeclaration;
+        node.name = asName(name);
+        node.constraint = constraint;
+        node.default = defaultType;
+        return node;
+    }
+
+    export function updateTypeParameterDeclaration(node: TypeParameterDeclaration, name: Identifier, constraint: TypeNode | undefined, defaultType: TypeNode | undefined) {
+        return node.name !== name
+            || node.constraint !== constraint
+            || node.default !== defaultType
+            ? updateNode(createTypeParameterDeclaration(name, constraint, defaultType), node)
+            : node;
     }
 
-    export function createParameterDeclaration(decorators: Decorator[], modifiers: Modifier[], dotDotDotToken: Node, name: string | Identifier | BindingPattern, questionToken: Node, type: TypeNode, initializer: Expression, location?: TextRange, flags?: NodeFlags) {
-        const node = <ParameterDeclaration>createNode(SyntaxKind.Parameter, location, flags);
-        node.decorators = decorators ? createNodeArray(decorators) : undefined;
-        node.modifiers = modifiers ? createNodeArray(modifiers) : undefined;
+    export function createParameter(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, dotDotDotToken: DotDotDotToken | undefined, name: string | BindingName, questionToken?: QuestionToken, type?: TypeNode, initializer?: Expression) {
+        const node = <ParameterDeclaration>createSynthesizedNode(SyntaxKind.Parameter);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
         node.dotDotDotToken = dotDotDotToken;
-        node.name = typeof name === "string" ? createIdentifier(name) : name;
+        node.name = asName(name);
         node.questionToken = questionToken;
         node.type = type;
         node.initializer = initializer ? parenthesizeExpressionForList(initializer) : undefined;
         return node;
     }
 
-    export function updateParameterDeclaration(node: ParameterDeclaration, decorators: Decorator[], modifiers: Modifier[], name: BindingName, type: TypeNode, initializer: Expression) {
-        if (node.decorators !== decorators || node.modifiers !== modifiers || node.name !== name || node.type !== type || node.initializer !== initializer) {
-            return updateNode(createParameterDeclaration(decorators, modifiers, node.dotDotDotToken, name, node.questionToken, type, initializer, /*location*/ node, /*flags*/ node.flags), node);
-        }
+    export function updateParameter(node: ParameterDeclaration, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, dotDotDotToken: DotDotDotToken | undefined, name: string | BindingName, questionToken: QuestionToken | undefined, type: TypeNode | undefined, initializer: Expression | undefined) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.dotDotDotToken !== dotDotDotToken
+            || node.name !== name
+            || node.questionToken !== questionToken
+            || node.type !== type
+            || node.initializer !== initializer
+            ? updateNode(createParameter(decorators, modifiers, dotDotDotToken, name, node.questionToken, type, initializer), node)
+            : node;
+    }
+
+    export function createDecorator(expression: Expression) {
+        const node = <Decorator>createSynthesizedNode(SyntaxKind.Decorator);
+        node.expression = parenthesizeForAccess(expression);
+        return node;
+    }
+
+    export function updateDecorator(node: Decorator, expression: Expression) {
+        return node.expression !== expression
+            ? updateNode(createDecorator(expression), node)
+            : node;
+    }
 
+
+    // Type Elements
+
+    export function createPropertySignature(modifiers: Modifier[] | undefined, name: PropertyName | string, questionToken: QuestionToken | undefined, type: TypeNode | undefined, initializer: Expression | undefined): PropertySignature {
+        const node = createSynthesizedNode(SyntaxKind.PropertySignature) as PropertySignature;
+        node.modifiers = asNodeArray(modifiers);
+        node.name = asName(name);
+        node.questionToken = questionToken;
+        node.type = type;
+        node.initializer = initializer;
         return node;
     }
 
-    // Type members
+    export function updatePropertySignature(node: PropertySignature, modifiers: Modifier[] | undefined, name: PropertyName, questionToken: QuestionToken | undefined, type: TypeNode | undefined, initializer: Expression | undefined) {
+        return node.modifiers !== modifiers
+            || node.name !== name
+            || node.questionToken !== questionToken
+            || node.type !== type
+            || node.initializer !== initializer
+            ? updateNode(createPropertySignature(modifiers, name, questionToken, type, initializer), node)
+            : node;
+    }
 
-    export function createProperty(decorators: Decorator[], modifiers: Modifier[], name: string | PropertyName, questionToken: Node, type: TypeNode, initializer: Expression, location?: TextRange) {
-        const node = <PropertyDeclaration>createNode(SyntaxKind.PropertyDeclaration, location);
-        node.decorators = decorators ? createNodeArray(decorators) : undefined;
-        node.modifiers = modifiers ? createNodeArray(modifiers) : undefined;
-        node.name = typeof name === "string" ? createIdentifier(name) : name;
+    export function createProperty(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: string | PropertyName, questionToken: QuestionToken | undefined, type: TypeNode | undefined, initializer: Expression | undefined) {
+        const node = <PropertyDeclaration>createSynthesizedNode(SyntaxKind.PropertyDeclaration);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.name = asName(name);
         node.questionToken = questionToken;
         node.type = type;
         node.initializer = initializer;
         return node;
     }
 
-    export function updateProperty(node: PropertyDeclaration, decorators: Decorator[], modifiers: Modifier[], name: PropertyName, type: TypeNode, initializer: Expression) {
-        if (node.decorators !== decorators || node.modifiers !== modifiers || node.name !== name || node.type !== type || node.initializer !== initializer) {
-            return updateNode(createProperty(decorators, modifiers, name, node.questionToken, type, initializer, node), node);
-        }
+    export function updateProperty(node: PropertyDeclaration, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: PropertyName, type: TypeNode | undefined, initializer: Expression | undefined) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.name !== name
+            || node.type !== type
+            || node.initializer !== initializer
+            ? updateNode(createProperty(decorators, modifiers, name, node.questionToken, type, initializer), node)
+            : node;
+    }
+
+    export function createMethodSignature(typeParameters: TypeParameterDeclaration[] | undefined, parameters: ParameterDeclaration[], type: TypeNode | undefined, name: string | PropertyName, questionToken: QuestionToken | undefined) {
+        const node = createSignatureDeclaration(SyntaxKind.MethodSignature, typeParameters, parameters, type) as MethodSignature;
+        node.name = asName(name);
+        node.questionToken = questionToken;
         return node;
     }
 
-    export function createMethod(decorators: Decorator[], modifiers: Modifier[], asteriskToken: Node, name: string | PropertyName, typeParameters: TypeParameterDeclaration[], parameters: ParameterDeclaration[], type: TypeNode, body: Block, location?: TextRange, flags?: NodeFlags) {
-        const node = <MethodDeclaration>createNode(SyntaxKind.MethodDeclaration, location, flags);
-        node.decorators = decorators ? createNodeArray(decorators) : undefined;
-        node.modifiers = modifiers ? createNodeArray(modifiers) : undefined;
+    export function updateMethodSignature(node: MethodSignature, typeParameters: NodeArray<TypeParameterDeclaration> | undefined, parameters: NodeArray<ParameterDeclaration>, type: TypeNode | undefined, name: PropertyName, questionToken: QuestionToken | undefined) {
+        return node.typeParameters !== typeParameters
+            || node.parameters !== parameters
+            || node.type !== type
+            || node.name !== name
+            || node.questionToken !== questionToken
+            ? updateNode(createMethodSignature(typeParameters, parameters, type, name, questionToken), node)
+            : node;
+    }
+
+    export function createMethod(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, asteriskToken: AsteriskToken | undefined, name: string | PropertyName, questionToken: QuestionToken | undefined, typeParameters: TypeParameterDeclaration[] | undefined, parameters: ParameterDeclaration[], type: TypeNode | undefined, body: Block | undefined) {
+        const node = <MethodDeclaration>createSynthesizedNode(SyntaxKind.MethodDeclaration);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
         node.asteriskToken = asteriskToken;
-        node.name = typeof name === "string" ? createIdentifier(name) : name;
-        node.typeParameters = typeParameters ? createNodeArray(typeParameters) : undefined;
+        node.name = asName(name);
+        node.questionToken = questionToken;
+        node.typeParameters = asNodeArray(typeParameters);
         node.parameters = createNodeArray(parameters);
         node.type = type;
         node.body = body;
         return node;
     }
 
-    export function updateMethod(node: MethodDeclaration, decorators: Decorator[], modifiers: Modifier[], name: PropertyName, typeParameters: TypeParameterDeclaration[], parameters: ParameterDeclaration[], type: TypeNode, body: Block) {
-        if (node.decorators !== decorators || node.modifiers !== modifiers || node.name !== name || node.typeParameters !== typeParameters || node.parameters !== parameters || node.type !== type || node.body !== body) {
-            return updateNode(createMethod(decorators, modifiers, node.asteriskToken, name, typeParameters, parameters, type, body, /*location*/ node, node.flags), node);
-        }
-        return node;
+    export function updateMethod(node: MethodDeclaration, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, asteriskToken: AsteriskToken | undefined, name: PropertyName, questionToken: QuestionToken | undefined, typeParameters: TypeParameterDeclaration[] | undefined, parameters: ParameterDeclaration[], type: TypeNode | undefined, body: Block | undefined) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.asteriskToken !== asteriskToken
+            || node.name !== name
+            || node.typeParameters !== typeParameters
+            || node.parameters !== parameters
+            || node.type !== type
+            || node.body !== body
+            ? updateNode(createMethod(decorators, modifiers, asteriskToken, name, questionToken, typeParameters, parameters, type, body), node)
+            : node;
     }
 
-    export function createConstructor(decorators: Decorator[], modifiers: Modifier[], parameters: ParameterDeclaration[], body: Block, location?: TextRange, flags?: NodeFlags) {
-        const node = <ConstructorDeclaration>createNode(SyntaxKind.Constructor, location, flags);
-        node.decorators = decorators ? createNodeArray(decorators) : undefined;
-        node.modifiers = modifiers ? createNodeArray(modifiers) : undefined;
+    export function createConstructor(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, parameters: ParameterDeclaration[], body: Block | undefined) {
+        const node = <ConstructorDeclaration>createSynthesizedNode(SyntaxKind.Constructor);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
         node.typeParameters = undefined;
         node.parameters = createNodeArray(parameters);
         node.type = undefined;
@@ -309,18 +379,20 @@ namespace ts {
         return node;
     }
 
-    export function updateConstructor(node: ConstructorDeclaration, decorators: Decorator[], modifiers: Modifier[], parameters: ParameterDeclaration[], body: Block) {
-        if (node.decorators !== decorators || node.modifiers !== modifiers || node.parameters !== parameters || node.body !== body) {
-            return updateNode(createConstructor(decorators, modifiers, parameters, body, /*location*/ node, node.flags), node);
-        }
-        return node;
+    export function updateConstructor(node: ConstructorDeclaration, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, parameters: ParameterDeclaration[], body: Block | undefined) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.parameters !== parameters
+            || node.body !== body
+            ? updateNode(createConstructor(decorators, modifiers, parameters, body), node)
+            : node;
     }
 
-    export function createGetAccessor(decorators: Decorator[], modifiers: Modifier[], name: string | PropertyName, parameters: ParameterDeclaration[], type: TypeNode, body: Block, location?: TextRange, flags?: NodeFlags) {
-        const node = <GetAccessorDeclaration>createNode(SyntaxKind.GetAccessor, location, flags);
-        node.decorators = decorators ? createNodeArray(decorators) : undefined;
-        node.modifiers = modifiers ? createNodeArray(modifiers) : undefined;
-        node.name = typeof name === "string" ? createIdentifier(name) : name;
+    export function createGetAccessor(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: string | PropertyName, parameters: ParameterDeclaration[], type: TypeNode | undefined, body: Block | undefined) {
+        const node = <GetAccessorDeclaration>createSynthesizedNode(SyntaxKind.GetAccessor);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.name = asName(name);
         node.typeParameters = undefined;
         node.parameters = createNodeArray(parameters);
         node.type = type;
@@ -328,573 +400,849 @@ namespace ts {
         return node;
     }
 
-    export function updateGetAccessor(node: GetAccessorDeclaration, decorators: Decorator[], modifiers: Modifier[], name: PropertyName, parameters: ParameterDeclaration[], type: TypeNode, body: Block) {
-        if (node.decorators !== decorators || node.modifiers !== modifiers || node.name !== name || node.parameters !== parameters || node.type !== type || node.body !== body) {
-            return updateNode(createGetAccessor(decorators, modifiers, name, parameters, type, body, /*location*/ node, node.flags), node);
-        }
-        return node;
+    export function updateGetAccessor(node: GetAccessorDeclaration, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: PropertyName, parameters: ParameterDeclaration[], type: TypeNode | undefined, body: Block | undefined) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.name !== name
+            || node.parameters !== parameters
+            || node.type !== type
+            || node.body !== body
+            ? updateNode(createGetAccessor(decorators, modifiers, name, parameters, type, body), node)
+            : node;
     }
 
-    export function createSetAccessor(decorators: Decorator[], modifiers: Modifier[], name: string | PropertyName, parameters: ParameterDeclaration[], body: Block, location?: TextRange, flags?: NodeFlags) {
-        const node = <SetAccessorDeclaration>createNode(SyntaxKind.SetAccessor, location, flags);
-        node.decorators = decorators ? createNodeArray(decorators) : undefined;
-        node.modifiers = modifiers ? createNodeArray(modifiers) : undefined;
-        node.name = typeof name === "string" ? createIdentifier(name) : name;
+    export function createSetAccessor(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: string | PropertyName, parameters: ParameterDeclaration[], body: Block | undefined) {
+        const node = <SetAccessorDeclaration>createSynthesizedNode(SyntaxKind.SetAccessor);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.name = asName(name);
         node.typeParameters = undefined;
         node.parameters = createNodeArray(parameters);
         node.body = body;
         return node;
     }
 
-    export function updateSetAccessor(node: SetAccessorDeclaration, decorators: Decorator[], modifiers: Modifier[], name: PropertyName, parameters: ParameterDeclaration[], body: Block) {
-        if (node.decorators !== decorators || node.modifiers !== modifiers || node.name !== name || node.parameters !== parameters || node.body !== body) {
-            return updateNode(createSetAccessor(decorators, modifiers, name, parameters, body, /*location*/ node, node.flags), node);
-        }
-        return node;
+    export function updateSetAccessor(node: SetAccessorDeclaration, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: PropertyName, parameters: ParameterDeclaration[], body: Block | undefined) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.name !== name
+            || node.parameters !== parameters
+            || node.body !== body
+            ? updateNode(createSetAccessor(decorators, modifiers, name, parameters, body), node)
+            : node;
     }
 
-    // Binding Patterns
+    export function createCallSignature(typeParameters: TypeParameterDeclaration[] | undefined, parameters: ParameterDeclaration[], type: TypeNode | undefined) {
+        return createSignatureDeclaration(SyntaxKind.CallSignature, typeParameters, parameters, type) as CallSignatureDeclaration;
+    }
 
-    export function createObjectBindingPattern(elements: BindingElement[], location?: TextRange) {
-        const node = <ObjectBindingPattern>createNode(SyntaxKind.ObjectBindingPattern, location);
-        node.elements = createNodeArray(elements);
-        return node;
+    export function updateCallSignature(node: CallSignatureDeclaration, typeParameters: NodeArray<TypeParameterDeclaration> | undefined, parameters: NodeArray<ParameterDeclaration>, type: TypeNode | undefined) {
+        return updateSignatureDeclaration(node, typeParameters, parameters, type);
     }
 
-    export function updateObjectBindingPattern(node: ObjectBindingPattern, elements: BindingElement[]) {
-        if (node.elements !== elements) {
-            return updateNode(createObjectBindingPattern(elements, node), node);
-        }
-        return node;
+    export function createConstructSignature(typeParameters: TypeParameterDeclaration[] | undefined, parameters: ParameterDeclaration[], type: TypeNode | undefined) {
+        return createSignatureDeclaration(SyntaxKind.ConstructSignature, typeParameters, parameters, type) as ConstructSignatureDeclaration;
     }
 
-    export function createArrayBindingPattern(elements: ArrayBindingElement[], location?: TextRange) {
-        const node = <ArrayBindingPattern>createNode(SyntaxKind.ArrayBindingPattern, location);
-        node.elements = createNodeArray(elements);
-        return node;
+    export function updateConstructSignature(node: ConstructSignatureDeclaration, typeParameters: NodeArray<TypeParameterDeclaration> | undefined, parameters: NodeArray<ParameterDeclaration>, type: TypeNode | undefined) {
+        return updateSignatureDeclaration(node, typeParameters, parameters, type);
     }
 
-    export function updateArrayBindingPattern(node: ArrayBindingPattern, elements: ArrayBindingElement[]) {
-        if (node.elements !== elements) {
-            return updateNode(createArrayBindingPattern(elements, node), node);
-        }
+    export function createIndexSignature(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, parameters: ParameterDeclaration[], type: TypeNode): IndexSignatureDeclaration {
+        const node = createSynthesizedNode(SyntaxKind.IndexSignature) as IndexSignatureDeclaration;
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.parameters = createNodeArray(parameters);
+        node.type = type;
         return node;
     }
 
-    export function createBindingElement(propertyName: string | PropertyName, dotDotDotToken: Node, name: string | BindingName, initializer?: Expression, location?: TextRange) {
-        const node = <BindingElement>createNode(SyntaxKind.BindingElement, location);
-        node.propertyName = typeof propertyName === "string" ? createIdentifier(propertyName) : propertyName;
-        node.dotDotDotToken = dotDotDotToken;
-        node.name = typeof name === "string" ? createIdentifier(name) : name;
-        node.initializer = initializer;
-        return node;
+    export function updateIndexSignature(node: IndexSignatureDeclaration, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, parameters: ParameterDeclaration[], type: TypeNode) {
+        return node.parameters !== parameters
+            || node.type !== type
+            || node.decorators !== decorators
+            || node.modifiers !== modifiers
+            ? updateNode(createIndexSignature(decorators, modifiers, parameters, type), node)
+            : node;
     }
 
-    export function updateBindingElement(node: BindingElement, propertyName: PropertyName, name: BindingName, initializer: Expression) {
-        if (node.propertyName !== propertyName || node.name !== name || node.initializer !== initializer) {
-            return updateNode(createBindingElement(propertyName, node.dotDotDotToken, name, initializer, node), node);
-        }
+    /* @internal */
+    export function createSignatureDeclaration(kind: SyntaxKind, typeParameters: TypeParameterDeclaration[] | undefined, parameters: ParameterDeclaration[], type: TypeNode | undefined) {
+        const node = createSynthesizedNode(kind) as SignatureDeclaration;
+        node.typeParameters = asNodeArray(typeParameters);
+        node.parameters = asNodeArray(parameters);
+        node.type = type;
         return node;
     }
 
-    // Expression
+    function updateSignatureDeclaration<T extends SignatureDeclaration>(node: T, typeParameters: NodeArray<TypeParameterDeclaration> | undefined, parameters: NodeArray<ParameterDeclaration>, type: TypeNode | undefined): T {
+        return node.typeParameters !== typeParameters
+            || node.parameters !== parameters
+            || node.type !== type
+            ? updateNode(<T>createSignatureDeclaration(node.kind, typeParameters, parameters, type), node)
+            : node;
+    }
 
-    export function createArrayLiteral(elements?: Expression[], location?: TextRange, multiLine?: boolean) {
-        const node = <ArrayLiteralExpression>createNode(SyntaxKind.ArrayLiteralExpression, location);
-        node.elements = parenthesizeListElements(createNodeArray(elements));
-        if (multiLine) {
-            node.multiLine = true;
-        }
+    // Types
 
-        return node;
+    export function createKeywordTypeNode(kind: KeywordTypeNode["kind"]) {
+        return <KeywordTypeNode>createSynthesizedNode(kind);
     }
 
-    export function updateArrayLiteral(node: ArrayLiteralExpression, elements: Expression[]) {
-        if (node.elements !== elements) {
-            return updateNode(createArrayLiteral(elements, node, node.multiLine), node);
-        }
+    export function createTypePredicateNode(parameterName: Identifier | ThisTypeNode | string, type: TypeNode) {
+        const node = createSynthesizedNode(SyntaxKind.TypePredicate) as TypePredicateNode;
+        node.parameterName = asName(parameterName);
+        node.type = type;
         return node;
     }
 
-    export function createObjectLiteral(properties?: ObjectLiteralElementLike[], location?: TextRange, multiLine?: boolean) {
-        const node = <ObjectLiteralExpression>createNode(SyntaxKind.ObjectLiteralExpression, location);
-        node.properties = createNodeArray(properties);
-        if (multiLine) {
-            node.multiLine = true;
-        }
-        return node;
+    export function updateTypePredicateNode(node: TypePredicateNode, parameterName: Identifier | ThisTypeNode, type: TypeNode) {
+        return node.parameterName !== parameterName
+            || node.type !== type
+            ? updateNode(createTypePredicateNode(parameterName, type), node)
+            : node;
     }
 
-    export function updateObjectLiteral(node: ObjectLiteralExpression, properties: ObjectLiteralElementLike[]) {
-        if (node.properties !== properties) {
-            return updateNode(createObjectLiteral(properties, node, node.multiLine), node);
-        }
+    export function createTypeReferenceNode(typeName: string | EntityName, typeArguments: TypeNode[] | undefined) {
+        const node = createSynthesizedNode(SyntaxKind.TypeReference) as TypeReferenceNode;
+        node.typeName = asName(typeName);
+        node.typeArguments = typeArguments && parenthesizeTypeParameters(typeArguments);
         return node;
     }
 
-    export function createPropertyAccess(expression: Expression, name: string | Identifier, location?: TextRange, flags?: NodeFlags) {
-        const node = <PropertyAccessExpression>createNode(SyntaxKind.PropertyAccessExpression, location, flags);
-        node.expression = parenthesizeForAccess(expression);
-        (node.emitNode || (node.emitNode = {})).flags |= EmitFlags.NoIndentation;
-        node.name = typeof name === "string" ? createIdentifier(name) : name;
-        return node;
+    export function updateTypeReferenceNode(node: TypeReferenceNode, typeName: EntityName, typeArguments: NodeArray<TypeNode> | undefined) {
+        return node.typeName !== typeName
+            || node.typeArguments !== typeArguments
+            ? updateNode(createTypeReferenceNode(typeName, typeArguments), node)
+            : node;
     }
 
-    export function updatePropertyAccess(node: PropertyAccessExpression, expression: Expression, name: Identifier) {
-        if (node.expression !== expression || node.name !== name) {
-            const propertyAccess = createPropertyAccess(expression, name, /*location*/ node, node.flags);
-            // Because we are updating existed propertyAccess we want to inherit its emitFlags instead of using default from createPropertyAccess
-            (propertyAccess.emitNode || (propertyAccess.emitNode = {})).flags = getEmitFlags(node);
-            return updateNode(propertyAccess, node);
-        }
-        return node;
+    export function createFunctionTypeNode(typeParameters: TypeParameterDeclaration[] | undefined, parameters: ParameterDeclaration[], type: TypeNode | undefined) {
+        return createSignatureDeclaration(SyntaxKind.FunctionType, typeParameters, parameters, type) as FunctionTypeNode;
     }
 
-    export function createElementAccess(expression: Expression, index: number | Expression, location?: TextRange) {
-        const node = <ElementAccessExpression>createNode(SyntaxKind.ElementAccessExpression, location);
-        node.expression = parenthesizeForAccess(expression);
-        node.argumentExpression = typeof index === "number" ? createLiteral(index) : index;
-        return node;
+    export function updateFunctionTypeNode(node: FunctionTypeNode, typeParameters: NodeArray<TypeParameterDeclaration> | undefined, parameters: NodeArray<ParameterDeclaration>, type: TypeNode | undefined) {
+        return <FunctionTypeNode>updateSignatureDeclaration(node, typeParameters, parameters, type);
     }
 
-    export function updateElementAccess(node: ElementAccessExpression, expression: Expression, argumentExpression: Expression) {
-        if (node.expression !== expression || node.argumentExpression !== argumentExpression) {
-            return updateNode(createElementAccess(expression, argumentExpression, node), node);
-        }
-        return node;
+    export function createConstructorTypeNode(typeParameters: TypeParameterDeclaration[] | undefined, parameters: ParameterDeclaration[], type: TypeNode | undefined) {
+        return createSignatureDeclaration(SyntaxKind.ConstructorType, typeParameters, parameters, type) as ConstructorTypeNode;
     }
 
-    export function createCall(expression: Expression, typeArguments: TypeNode[], argumentsArray: Expression[], location?: TextRange, flags?: NodeFlags) {
-        const node = <CallExpression>createNode(SyntaxKind.CallExpression, location, flags);
-        node.expression = parenthesizeForAccess(expression);
-        if (typeArguments) {
-            node.typeArguments = createNodeArray(typeArguments);
-        }
-
-        node.arguments = parenthesizeListElements(createNodeArray(argumentsArray));
-        return node;
+    export function updateConstructorTypeNode(node: ConstructorTypeNode, typeParameters: NodeArray<TypeParameterDeclaration> | undefined, parameters: NodeArray<ParameterDeclaration>, type: TypeNode | undefined) {
+        return <ConstructorTypeNode>updateSignatureDeclaration(node, typeParameters, parameters, type);
     }
 
-    export function updateCall(node: CallExpression, expression: Expression, typeArguments: TypeNode[], argumentsArray: Expression[]) {
-        if (expression !== node.expression || typeArguments !== node.typeArguments || argumentsArray !== node.arguments) {
-            return updateNode(createCall(expression, typeArguments, argumentsArray, /*location*/ node, node.flags), node);
-        }
+    export function createTypeQueryNode(exprName: EntityName) {
+        const node = createSynthesizedNode(SyntaxKind.TypeQuery) as TypeQueryNode;
+        node.exprName = exprName;
         return node;
     }
 
-    export function createNew(expression: Expression, typeArguments: TypeNode[], argumentsArray: Expression[], location?: TextRange, flags?: NodeFlags) {
-        const node = <NewExpression>createNode(SyntaxKind.NewExpression, location, flags);
-        node.expression = parenthesizeForNew(expression);
-        node.typeArguments = typeArguments ? createNodeArray(typeArguments) : undefined;
-        node.arguments = argumentsArray ? parenthesizeListElements(createNodeArray(argumentsArray)) : undefined;
-        return node;
+    export function updateTypeQueryNode(node: TypeQueryNode, exprName: EntityName) {
+        return node.exprName !== exprName
+            ? updateNode(createTypeQueryNode(exprName), node)
+            : node;
     }
 
-    export function updateNew(node: NewExpression, expression: Expression, typeArguments: TypeNode[], argumentsArray: Expression[]) {
-        if (node.expression !== expression || node.typeArguments !== typeArguments || node.arguments !== argumentsArray) {
-            return updateNode(createNew(expression, typeArguments, argumentsArray, /*location*/ node, node.flags), node);
-        }
+    export function createTypeLiteralNode(members: TypeElement[]) {
+        const node = createSynthesizedNode(SyntaxKind.TypeLiteral) as TypeLiteralNode;
+        node.members = createNodeArray(members);
         return node;
     }
 
-    export function createTaggedTemplate(tag: Expression, template: Template, location?: TextRange) {
-        const node = <TaggedTemplateExpression>createNode(SyntaxKind.TaggedTemplateExpression, location);
-        node.tag = parenthesizeForAccess(tag);
-        node.template = template;
-        return node;
+    export function updateTypeLiteralNode(node: TypeLiteralNode, members: NodeArray<TypeElement>) {
+        return node.members !== members
+            ? updateNode(createTypeLiteralNode(members), node)
+            : node;
     }
 
-    export function updateTaggedTemplate(node: TaggedTemplateExpression, tag: Expression, template: Template) {
-        if (node.tag !== tag || node.template !== template) {
-            return updateNode(createTaggedTemplate(tag, template, node), node);
-        }
+    export function createArrayTypeNode(elementType: TypeNode) {
+        const node = createSynthesizedNode(SyntaxKind.ArrayType) as ArrayTypeNode;
+        node.elementType = parenthesizeElementTypeMember(elementType);
         return node;
     }
 
-    export function createParen(expression: Expression, location?: TextRange) {
-        const node = <ParenthesizedExpression>createNode(SyntaxKind.ParenthesizedExpression, location);
-        node.expression = expression;
-        return node;
+    export function updateArrayTypeNode(node: ArrayTypeNode, elementType: TypeNode): ArrayTypeNode {
+        return node.elementType !== elementType
+            ? updateNode(createArrayTypeNode(elementType), node)
+            : node;
     }
 
-    export function updateParen(node: ParenthesizedExpression, expression: Expression) {
-        if (node.expression !== expression) {
-            return updateNode(createParen(expression, node), node);
-        }
+    export function createTupleTypeNode(elementTypes: TypeNode[]) {
+        const node = createSynthesizedNode(SyntaxKind.TupleType) as TupleTypeNode;
+        node.elementTypes = createNodeArray(elementTypes);
         return node;
     }
 
-    export function createFunctionExpression(asteriskToken: Node, name: string | Identifier, typeParameters: TypeParameterDeclaration[], parameters: ParameterDeclaration[], type: TypeNode, body: Block, location?: TextRange, flags?: NodeFlags) {
-        const node = <FunctionExpression>createNode(SyntaxKind.FunctionExpression, location, flags);
-        node.modifiers = undefined;
-        node.asteriskToken = asteriskToken;
-        node.name = typeof name === "string" ? createIdentifier(name) : name;
-        node.typeParameters = typeParameters ? createNodeArray(typeParameters) : undefined;
-        node.parameters = createNodeArray(parameters);
-        node.type = type;
-        node.body = body;
-        return node;
+    export function updateTypleTypeNode(node: TupleTypeNode, elementTypes: TypeNode[]) {
+        return node.elementTypes !== elementTypes
+            ? updateNode(createTupleTypeNode(elementTypes), node)
+            : node;
     }
 
-    export function updateFunctionExpression(node: FunctionExpression, name: Identifier, typeParameters: TypeParameterDeclaration[], parameters: ParameterDeclaration[], type: TypeNode, body: Block) {
-        if (node.name !== name || node.typeParameters !== typeParameters || node.parameters !== parameters || node.type !== type || node.body !== body) {
-            return updateNode(createFunctionExpression(node.asteriskToken, name, typeParameters, parameters, type, body, /*location*/ node, node.flags), node);
-        }
-        return node;
+    export function createUnionTypeNode(types: TypeNode[]): UnionTypeNode {
+        return <UnionTypeNode>createUnionOrIntersectionTypeNode(SyntaxKind.UnionType, types);
     }
 
-    export function createArrowFunction(modifiers: Modifier[], typeParameters: TypeParameterDeclaration[], parameters: ParameterDeclaration[], type: TypeNode, equalsGreaterThanToken: Node, body: ConciseBody, location?: TextRange, flags?: NodeFlags) {
-        const node = <ArrowFunction>createNode(SyntaxKind.ArrowFunction, location, flags);
-        node.modifiers = modifiers ? createNodeArray(modifiers) : undefined;
-        node.typeParameters = typeParameters ? createNodeArray(typeParameters) : undefined;
-        node.parameters = createNodeArray(parameters);
-        node.type = type;
-        node.equalsGreaterThanToken = equalsGreaterThanToken || createNode(SyntaxKind.EqualsGreaterThanToken);
-        node.body = parenthesizeConciseBody(body);
-        return node;
+    export function updateUnionTypeNode(node: UnionTypeNode, types: NodeArray<TypeNode>) {
+        return updateUnionOrIntersectionTypeNode(node, types);
     }
 
-    export function updateArrowFunction(node: ArrowFunction, modifiers: Modifier[], typeParameters: TypeParameterDeclaration[], parameters: ParameterDeclaration[], type: TypeNode, body: ConciseBody) {
-        if (node.modifiers !== modifiers || node.typeParameters !== typeParameters || node.parameters !== parameters || node.type !== type || node.body !== body) {
-            return updateNode(createArrowFunction(modifiers, typeParameters, parameters, type, node.equalsGreaterThanToken, body, /*location*/ node, node.flags), node);
-        }
-        return node;
+    export function createIntersectionTypeNode(types: TypeNode[]): IntersectionTypeNode {
+        return <IntersectionTypeNode>createUnionOrIntersectionTypeNode(SyntaxKind.IntersectionType, types);
     }
 
-    export function createDelete(expression: Expression, location?: TextRange) {
-        const node = <DeleteExpression>createNode(SyntaxKind.DeleteExpression, location);
-        node.expression = parenthesizePrefixOperand(expression);
-        return node;
+    export function updateIntersectionTypeNode(node: IntersectionTypeNode, types: NodeArray<TypeNode>) {
+        return updateUnionOrIntersectionTypeNode(node, types);
     }
 
-    export function updateDelete(node: DeleteExpression, expression: Expression) {
-        if (node.expression !== expression) {
-            return updateNode(createDelete(expression, node), expression);
-        }
+    export function createUnionOrIntersectionTypeNode(kind: SyntaxKind.UnionType | SyntaxKind.IntersectionType, types: TypeNode[]) {
+        const node = createSynthesizedNode(kind) as UnionTypeNode | IntersectionTypeNode;
+        node.types = parenthesizeElementTypeMembers(types);
         return node;
     }
 
-    export function createTypeOf(expression: Expression, location?: TextRange) {
-        const node = <TypeOfExpression>createNode(SyntaxKind.TypeOfExpression, location);
-        node.expression = parenthesizePrefixOperand(expression);
-        return node;
+    function updateUnionOrIntersectionTypeNode<T extends UnionOrIntersectionTypeNode>(node: T, types: NodeArray<TypeNode>): T {
+        return node.types !== types
+            ? updateNode(<T>createUnionOrIntersectionTypeNode(node.kind, types), node)
+            : node;
     }
 
-    export function updateTypeOf(node: TypeOfExpression, expression: Expression) {
-        if (node.expression !== expression) {
-            return updateNode(createTypeOf(expression, node), expression);
-        }
+    export function createParenthesizedType(type: TypeNode) {
+        const node = <ParenthesizedTypeNode>createSynthesizedNode(SyntaxKind.ParenthesizedType);
+        node.type = type;
         return node;
     }
 
-    export function createVoid(expression: Expression, location?: TextRange) {
-        const node = <VoidExpression>createNode(SyntaxKind.VoidExpression, location);
-        node.expression = parenthesizePrefixOperand(expression);
-        return node;
+    export function updateParenthesizedType(node: ParenthesizedTypeNode, type: TypeNode) {
+        return node.type !== type
+            ? updateNode(createParenthesizedType(type), node)
+            : node;
     }
 
-    export function updateVoid(node: VoidExpression, expression: Expression) {
-        if (node.expression !== expression) {
-            return updateNode(createVoid(expression, node), node);
-        }
-        return node;
+    export function createThisTypeNode() {
+        return <ThisTypeNode>createSynthesizedNode(SyntaxKind.ThisType);
     }
 
-    export function createAwait(expression: Expression, location?: TextRange) {
-        const node = <AwaitExpression>createNode(SyntaxKind.AwaitExpression, location);
-        node.expression = parenthesizePrefixOperand(expression);
+    export function createTypeOperatorNode(type: TypeNode) {
+        const node = createSynthesizedNode(SyntaxKind.TypeOperator) as TypeOperatorNode;
+        node.operator = SyntaxKind.KeyOfKeyword;
+        node.type = parenthesizeElementTypeMember(type);
         return node;
     }
 
-    export function updateAwait(node: AwaitExpression, expression: Expression) {
-        if (node.expression !== expression) {
-            return updateNode(createAwait(expression, node), node);
-        }
-        return node;
+    export function updateTypeOperatorNode(node: TypeOperatorNode, type: TypeNode) {
+        return node.type !== type ? updateNode(createTypeOperatorNode(type), node) : node;
     }
 
-    export function createPrefix(operator: SyntaxKind, operand: Expression, location?: TextRange) {
-        const node = <PrefixUnaryExpression>createNode(SyntaxKind.PrefixUnaryExpression, location);
-        node.operator = operator;
-        node.operand = parenthesizePrefixOperand(operand);
+    export function createIndexedAccessTypeNode(objectType: TypeNode, indexType: TypeNode) {
+        const node = createSynthesizedNode(SyntaxKind.IndexedAccessType) as IndexedAccessTypeNode;
+        node.objectType = parenthesizeElementTypeMember(objectType);
+        node.indexType = indexType;
         return node;
     }
 
-    export function updatePrefix(node: PrefixUnaryExpression, operand: Expression) {
-        if (node.operand !== operand) {
-            return updateNode(createPrefix(node.operator, operand, node), node);
-        }
-        return node;
+    export function updateIndexedAccessTypeNode(node: IndexedAccessTypeNode, objectType: TypeNode, indexType: TypeNode) {
+        return node.objectType !== objectType
+            || node.indexType !== indexType
+            ? updateNode(createIndexedAccessTypeNode(objectType, indexType), node)
+            : node;
     }
 
-    export function createPostfix(operand: Expression, operator: SyntaxKind, location?: TextRange) {
-        const node = <PostfixUnaryExpression>createNode(SyntaxKind.PostfixUnaryExpression, location);
-        node.operand = parenthesizePostfixOperand(operand);
-        node.operator = operator;
+    export function createMappedTypeNode(readonlyToken: ReadonlyToken | undefined, typeParameter: TypeParameterDeclaration, questionToken: QuestionToken | undefined, type: TypeNode | undefined): MappedTypeNode {
+        const node = createSynthesizedNode(SyntaxKind.MappedType) as MappedTypeNode;
+        node.readonlyToken = readonlyToken;
+        node.typeParameter = typeParameter;
+        node.questionToken = questionToken;
+        node.type = type;
         return node;
     }
 
-    export function updatePostfix(node: PostfixUnaryExpression, operand: Expression) {
-        if (node.operand !== operand) {
-            return updateNode(createPostfix(operand, node.operator, node), node);
-        }
-        return node;
+    export function updateMappedTypeNode(node: MappedTypeNode, readonlyToken: ReadonlyToken | undefined, typeParameter: TypeParameterDeclaration, questionToken: QuestionToken | undefined, type: TypeNode | undefined): MappedTypeNode {
+        return node.readonlyToken !== readonlyToken
+            || node.typeParameter !== typeParameter
+            || node.questionToken !== questionToken
+            || node.type !== type
+            ? updateNode(createMappedTypeNode(readonlyToken, typeParameter, questionToken, type), node)
+            : node;
     }
 
-    export function createBinary(left: Expression, operator: SyntaxKind | Node, right: Expression, location?: TextRange) {
-        const operatorToken = typeof operator === "number" ? createSynthesizedNode(operator) : operator;
-        const operatorKind = operatorToken.kind;
-        const node = <BinaryExpression>createNode(SyntaxKind.BinaryExpression, location);
-        node.left = parenthesizeBinaryOperand(operatorKind, left, /*isLeftSideOfBinary*/ true, /*leftOperand*/ undefined);
-        node.operatorToken = operatorToken;
-        node.right = parenthesizeBinaryOperand(operatorKind, right, /*isLeftSideOfBinary*/ false, node.left);
+    export function createLiteralTypeNode(literal: Expression) {
+        const node = createSynthesizedNode(SyntaxKind.LiteralType) as LiteralTypeNode;
+        node.literal = literal;
         return node;
     }
 
-    export function updateBinary(node: BinaryExpression, left: Expression, right: Expression) {
-        if (node.left !== left || node.right !== right) {
-            return updateNode(createBinary(left, node.operatorToken, right, /*location*/ node), node);
-        }
-        return node;
+    export function updateLiteralTypeNode(node: LiteralTypeNode, literal: Expression) {
+        return node.literal !== literal
+            ? updateNode(createLiteralTypeNode(literal), node)
+            : node;
     }
 
-    export function createConditional(condition: Expression, questionToken: Node, whenTrue: Expression, colonToken: Node, whenFalse: Expression, location?: TextRange) {
-        const node = <ConditionalExpression>createNode(SyntaxKind.ConditionalExpression, location);
-        node.condition = condition;
-        node.questionToken = questionToken;
-        node.whenTrue = whenTrue;
-        node.colonToken = colonToken;
-        node.whenFalse = whenFalse;
+    // Binding Patterns
+
+    export function createObjectBindingPattern(elements: BindingElement[]) {
+        const node = <ObjectBindingPattern>createSynthesizedNode(SyntaxKind.ObjectBindingPattern);
+        node.elements = createNodeArray(elements);
         return node;
     }
 
-    export function updateConditional(node: ConditionalExpression, condition: Expression, whenTrue: Expression, whenFalse: Expression) {
-        if (node.condition !== condition || node.whenTrue !== whenTrue || node.whenFalse !== whenFalse) {
-            return updateNode(createConditional(condition, node.questionToken, whenTrue, node.colonToken, whenFalse, node), node);
-        }
-        return node;
+    export function updateObjectBindingPattern(node: ObjectBindingPattern, elements: BindingElement[]) {
+        return node.elements !== elements
+            ? updateNode(createObjectBindingPattern(elements), node)
+            : node;
     }
 
-    export function createTemplateExpression(head: TemplateLiteralFragment, templateSpans: TemplateSpan[], location?: TextRange) {
-        const node = <TemplateExpression>createNode(SyntaxKind.TemplateExpression, location);
-        node.head = head;
-        node.templateSpans = createNodeArray(templateSpans);
+    export function createArrayBindingPattern(elements: ArrayBindingElement[]) {
+        const node = <ArrayBindingPattern>createSynthesizedNode(SyntaxKind.ArrayBindingPattern);
+        node.elements = createNodeArray(elements);
         return node;
     }
 
-    export function updateTemplateExpression(node: TemplateExpression, head: TemplateLiteralFragment, templateSpans: TemplateSpan[]) {
-        if (node.head !== head || node.templateSpans !== templateSpans) {
-            return updateNode(createTemplateExpression(head, templateSpans, node), node);
-        }
-        return node;
+    export function updateArrayBindingPattern(node: ArrayBindingPattern, elements: ArrayBindingElement[]) {
+        return node.elements !== elements
+            ? updateNode(createArrayBindingPattern(elements), node)
+            : node;
     }
 
-    export function createYield(asteriskToken: Node, expression: Expression, location?: TextRange) {
-        const node = <YieldExpression>createNode(SyntaxKind.YieldExpression, location);
-        node.asteriskToken = asteriskToken;
-        node.expression = expression;
+    export function createBindingElement(dotDotDotToken: DotDotDotToken | undefined, propertyName: string | PropertyName | undefined, name: string | BindingName, initializer?: Expression) {
+        const node = <BindingElement>createSynthesizedNode(SyntaxKind.BindingElement);
+        node.dotDotDotToken = dotDotDotToken;
+        node.propertyName = asName(propertyName);
+        node.name = asName(name);
+        node.initializer = initializer;
         return node;
     }
 
-    export function updateYield(node: YieldExpression, expression: Expression) {
-        if (node.expression !== expression) {
-            return updateNode(createYield(node.asteriskToken, expression, node), node);
-        }
-        return node;
+    export function updateBindingElement(node: BindingElement, dotDotDotToken: DotDotDotToken | undefined, propertyName: PropertyName | undefined, name: BindingName, initializer: Expression | undefined) {
+        return node.propertyName !== propertyName
+            || node.dotDotDotToken !== dotDotDotToken
+            || node.name !== name
+            || node.initializer !== initializer
+            ? updateNode(createBindingElement(dotDotDotToken, propertyName, name, initializer), node)
+            : node;
     }
 
-    export function createSpread(expression: Expression, location?: TextRange) {
-        const node = <SpreadElementExpression>createNode(SyntaxKind.SpreadElementExpression, location);
-        node.expression = parenthesizeExpressionForList(expression);
+    // Expression
+
+    export function createArrayLiteral(elements?: Expression[], multiLine?: boolean) {
+        const node = <ArrayLiteralExpression>createSynthesizedNode(SyntaxKind.ArrayLiteralExpression);
+        node.elements = parenthesizeListElements(createNodeArray(elements));
+        if (multiLine) node.multiLine = true;
         return node;
     }
 
-    export function updateSpread(node: SpreadElementExpression, expression: Expression) {
-        if (node.expression !== expression) {
-            return updateNode(createSpread(expression, node), node);
-        }
-        return node;
+    export function updateArrayLiteral(node: ArrayLiteralExpression, elements: Expression[]) {
+        return node.elements !== elements
+            ? updateNode(createArrayLiteral(elements, node.multiLine), node)
+            : node;
     }
 
-    export function createClassExpression(modifiers: Modifier[], name: Identifier, typeParameters: TypeParameterDeclaration[], heritageClauses: HeritageClause[], members: ClassElement[], location?: TextRange) {
-        const node = <ClassExpression>createNode(SyntaxKind.ClassExpression, location);
-        node.decorators = undefined;
-        node.modifiers = modifiers ? createNodeArray(modifiers) : undefined;
-        node.name = name;
-        node.typeParameters = typeParameters ? createNodeArray(typeParameters) : undefined;
-        node.heritageClauses = createNodeArray(heritageClauses);
-        node.members = createNodeArray(members);
+    export function createObjectLiteral(properties?: ObjectLiteralElementLike[], multiLine?: boolean) {
+        const node = <ObjectLiteralExpression>createSynthesizedNode(SyntaxKind.ObjectLiteralExpression);
+        node.properties = createNodeArray(properties);
+        if (multiLine) node.multiLine = true;
         return node;
     }
 
-    export function updateClassExpression(node: ClassExpression, modifiers: Modifier[], name: Identifier, typeParameters: TypeParameterDeclaration[], heritageClauses: HeritageClause[], members: ClassElement[]) {
-        if (node.modifiers !== modifiers || node.name !== name || node.typeParameters !== typeParameters || node.heritageClauses !== heritageClauses || node.members !== members) {
-            return updateNode(createClassExpression(modifiers, name, typeParameters, heritageClauses, members, node), node);
-        }
+    export function updateObjectLiteral(node: ObjectLiteralExpression, properties: ObjectLiteralElementLike[]) {
+        return node.properties !== properties
+            ? updateNode(createObjectLiteral(properties, node.multiLine), node)
+            : node;
+    }
+
+    export function createPropertyAccess(expression: Expression, name: string | Identifier) {
+        const node = <PropertyAccessExpression>createSynthesizedNode(SyntaxKind.PropertyAccessExpression);
+        node.expression = parenthesizeForAccess(expression);
+        node.name = asName(name);
+        setEmitFlags(node, EmitFlags.NoIndentation);
         return node;
     }
 
-    export function createOmittedExpression(location?: TextRange) {
-        const node = <OmittedExpression>createNode(SyntaxKind.OmittedExpression, location);
+    export function updatePropertyAccess(node: PropertyAccessExpression, expression: Expression, name: Identifier) {
+        // Because we are updating existed propertyAccess we want to inherit its emitFlags
+        // instead of using the default from createPropertyAccess
+        return node.expression !== expression
+            || node.name !== name
+            ? updateNode(setEmitFlags(createPropertyAccess(expression, name), getEmitFlags(node)), node)
+            : node;
+    }
+
+    export function createElementAccess(expression: Expression, index: number | Expression) {
+        const node = <ElementAccessExpression>createSynthesizedNode(SyntaxKind.ElementAccessExpression);
+        node.expression = parenthesizeForAccess(expression);
+        node.argumentExpression = asExpression(index);
         return node;
     }
 
-    export function createExpressionWithTypeArguments(typeArguments: TypeNode[], expression: Expression, location?: TextRange) {
-        const node = <ExpressionWithTypeArguments>createNode(SyntaxKind.ExpressionWithTypeArguments, location);
-        node.typeArguments = typeArguments ? createNodeArray(typeArguments) : undefined;
+    export function updateElementAccess(node: ElementAccessExpression, expression: Expression, argumentExpression: Expression) {
+        return node.expression !== expression
+            || node.argumentExpression !== argumentExpression
+            ? updateNode(createElementAccess(expression, argumentExpression), node)
+            : node;
+    }
+
+    export function createCall(expression: Expression, typeArguments: TypeNode[] | undefined, argumentsArray: Expression[]) {
+        const node = <CallExpression>createSynthesizedNode(SyntaxKind.CallExpression);
         node.expression = parenthesizeForAccess(expression);
+        node.typeArguments = asNodeArray(typeArguments);
+        node.arguments = parenthesizeListElements(createNodeArray(argumentsArray));
         return node;
     }
 
-    export function updateExpressionWithTypeArguments(node: ExpressionWithTypeArguments, typeArguments: TypeNode[], expression: Expression) {
-        if (node.typeArguments !== typeArguments || node.expression !== expression) {
-            return updateNode(createExpressionWithTypeArguments(typeArguments, expression, node), node);
-        }
+    export function updateCall(node: CallExpression, expression: Expression, typeArguments: TypeNode[] | undefined, argumentsArray: Expression[]) {
+        return node.expression !== expression
+            || node.typeArguments !== typeArguments
+            || node.arguments !== argumentsArray
+            ? updateNode(createCall(expression, typeArguments, argumentsArray), node)
+            : node;
+    }
+
+    export function createNew(expression: Expression, typeArguments: TypeNode[] | undefined, argumentsArray: Expression[] | undefined) {
+        const node = <NewExpression>createSynthesizedNode(SyntaxKind.NewExpression);
+        node.expression = parenthesizeForNew(expression);
+        node.typeArguments = asNodeArray(typeArguments);
+        node.arguments = argumentsArray ? parenthesizeListElements(createNodeArray(argumentsArray)) : undefined;
         return node;
     }
 
+    export function updateNew(node: NewExpression, expression: Expression, typeArguments: TypeNode[] | undefined, argumentsArray: Expression[] | undefined) {
+        return node.expression !== expression
+            || node.typeArguments !== typeArguments
+            || node.arguments !== argumentsArray
+            ? updateNode(createNew(expression, typeArguments, argumentsArray), node)
+            : node;
+    }
 
-    // Misc
+    export function createTaggedTemplate(tag: Expression, template: TemplateLiteral) {
+        const node = <TaggedTemplateExpression>createSynthesizedNode(SyntaxKind.TaggedTemplateExpression);
+        node.tag = parenthesizeForAccess(tag);
+        node.template = template;
+        return node;
+    }
+
+    export function updateTaggedTemplate(node: TaggedTemplateExpression, tag: Expression, template: TemplateLiteral) {
+        return node.tag !== tag
+            || node.template !== template
+            ? updateNode(createTaggedTemplate(tag, template), node)
+            : node;
+    }
+
+    export function createTypeAssertion(type: TypeNode, expression: Expression) {
+        const node = <TypeAssertion>createSynthesizedNode(SyntaxKind.TypeAssertionExpression);
+        node.type = type;
+        node.expression = parenthesizePrefixOperand(expression);
+        return node;
+    }
 
-    export function createTemplateSpan(expression: Expression, literal: TemplateLiteralFragment, location?: TextRange) {
-        const node = <TemplateSpan>createNode(SyntaxKind.TemplateSpan, location);
+    export function updateTypeAssertion(node: TypeAssertion, type: TypeNode, expression: Expression) {
+        return node.type !== type
+            || node.expression !== expression
+            ? updateNode(createTypeAssertion(type, expression), node)
+            : node;
+    }
+
+    export function createParen(expression: Expression) {
+        const node = <ParenthesizedExpression>createSynthesizedNode(SyntaxKind.ParenthesizedExpression);
         node.expression = expression;
-        node.literal = literal;
         return node;
     }
 
-    export function updateTemplateSpan(node: TemplateSpan, expression: Expression, literal: TemplateLiteralFragment) {
-        if (node.expression !== expression || node.literal !== literal) {
-            return updateNode(createTemplateSpan(expression, literal, node), node);
-        }
+    export function updateParen(node: ParenthesizedExpression, expression: Expression) {
+        return node.expression !== expression
+            ? updateNode(createParen(expression), node)
+            : node;
+    }
+
+    export function createFunctionExpression(modifiers: Modifier[] | undefined, asteriskToken: AsteriskToken | undefined, name: string | Identifier | undefined, typeParameters: TypeParameterDeclaration[] | undefined, parameters: ParameterDeclaration[], type: TypeNode | undefined, body: Block) {
+        const node = <FunctionExpression>createSynthesizedNode(SyntaxKind.FunctionExpression);
+        node.modifiers = asNodeArray(modifiers);
+        node.asteriskToken = asteriskToken;
+        node.name = asName(name);
+        node.typeParameters = asNodeArray(typeParameters);
+        node.parameters = createNodeArray(parameters);
+        node.type = type;
+        node.body = body;
         return node;
     }
 
-    // Element
+    export function updateFunctionExpression(node: FunctionExpression, modifiers: Modifier[] | undefined, asteriskToken: AsteriskToken | undefined, name: Identifier | undefined, typeParameters: TypeParameterDeclaration[] | undefined, parameters: ParameterDeclaration[], type: TypeNode | undefined, body: Block) {
+        return node.name !== name
+            || node.modifiers !== modifiers
+            || node.asteriskToken !== asteriskToken
+            || node.typeParameters !== typeParameters
+            || node.parameters !== parameters
+            || node.type !== type
+            || node.body !== body
+            ? updateNode(createFunctionExpression(modifiers, asteriskToken, name, typeParameters, parameters, type, body), node)
+            : node;
+    }
 
-    export function createBlock(statements: Statement[], location?: TextRange, multiLine?: boolean, flags?: NodeFlags): Block {
-        const block = <Block>createNode(SyntaxKind.Block, location, flags);
-        block.statements = createNodeArray(statements);
-        if (multiLine) {
-            block.multiLine = true;
-        }
-        return block;
+    export function createArrowFunction(modifiers: Modifier[] | undefined, typeParameters: TypeParameterDeclaration[] | undefined, parameters: ParameterDeclaration[], type: TypeNode | undefined, equalsGreaterThanToken: EqualsGreaterThanToken | undefined, body: ConciseBody) {
+        const node = <ArrowFunction>createSynthesizedNode(SyntaxKind.ArrowFunction);
+        node.modifiers = asNodeArray(modifiers);
+        node.typeParameters = asNodeArray(typeParameters);
+        node.parameters = createNodeArray(parameters);
+        node.type = type;
+        node.equalsGreaterThanToken = equalsGreaterThanToken || createToken(SyntaxKind.EqualsGreaterThanToken);
+        node.body = parenthesizeConciseBody(body);
+        return node;
     }
 
-    export function updateBlock(node: Block, statements: Statement[]) {
-        if (statements !== node.statements) {
-            return updateNode(createBlock(statements, /*location*/ node, node.multiLine, node.flags), node);
-        }
+    export function updateArrowFunction(node: ArrowFunction, modifiers: Modifier[] | undefined, typeParameters: TypeParameterDeclaration[] | undefined, parameters: ParameterDeclaration[], type: TypeNode | undefined, body: ConciseBody) {
+        return node.modifiers !== modifiers
+            || node.typeParameters !== typeParameters
+            || node.parameters !== parameters
+            || node.type !== type
+            || node.body !== body
+            ? updateNode(createArrowFunction(modifiers, typeParameters, parameters, type, node.equalsGreaterThanToken, body), node)
+            : node;
+    }
 
+    export function createDelete(expression: Expression) {
+        const node = <DeleteExpression>createSynthesizedNode(SyntaxKind.DeleteExpression);
+        node.expression = parenthesizePrefixOperand(expression);
         return node;
     }
 
-    export function createVariableStatement(modifiers: Modifier[], declarationList: VariableDeclarationList | VariableDeclaration[], location?: TextRange, flags?: NodeFlags): VariableStatement {
-        const node = <VariableStatement>createNode(SyntaxKind.VariableStatement, location, flags);
-        node.decorators = undefined;
-        node.modifiers = modifiers ? createNodeArray(modifiers) : undefined;
-        node.declarationList = isArray(declarationList) ? createVariableDeclarationList(declarationList) : declarationList;
+    export function updateDelete(node: DeleteExpression, expression: Expression) {
+        return node.expression !== expression
+            ? updateNode(createDelete(expression), node)
+            : node;
+    }
+
+    export function createTypeOf(expression: Expression) {
+        const node = <TypeOfExpression>createSynthesizedNode(SyntaxKind.TypeOfExpression);
+        node.expression = parenthesizePrefixOperand(expression);
         return node;
     }
 
-    export function updateVariableStatement(node: VariableStatement, modifiers: Modifier[], declarationList: VariableDeclarationList): VariableStatement {
-        if (node.modifiers !== modifiers || node.declarationList !== declarationList) {
-            return updateNode(createVariableStatement(modifiers, declarationList, /*location*/ node, node.flags), node);
-        }
+    export function updateTypeOf(node: TypeOfExpression, expression: Expression) {
+        return node.expression !== expression
+            ? updateNode(createTypeOf(expression), node)
+            : node;
+    }
+
+    export function createVoid(expression: Expression) {
+        const node = <VoidExpression>createSynthesizedNode(SyntaxKind.VoidExpression);
+        node.expression = parenthesizePrefixOperand(expression);
         return node;
     }
 
-    export function createVariableDeclarationList(declarations: VariableDeclaration[], location?: TextRange, flags?: NodeFlags): VariableDeclarationList {
-        const node = <VariableDeclarationList>createNode(SyntaxKind.VariableDeclarationList, location, flags);
-        node.declarations = createNodeArray(declarations);
+    export function updateVoid(node: VoidExpression, expression: Expression) {
+        return node.expression !== expression
+            ? updateNode(createVoid(expression), node)
+            : node;
+    }
+
+    export function createAwait(expression: Expression) {
+        const node = <AwaitExpression>createSynthesizedNode(SyntaxKind.AwaitExpression);
+        node.expression = parenthesizePrefixOperand(expression);
         return node;
     }
 
-    export function updateVariableDeclarationList(node: VariableDeclarationList, declarations: VariableDeclaration[]) {
-        if (node.declarations !== declarations) {
-            return updateNode(createVariableDeclarationList(declarations, /*location*/ node, node.flags), node);
-        }
+    export function updateAwait(node: AwaitExpression, expression: Expression) {
+        return node.expression !== expression
+            ? updateNode(createAwait(expression), node)
+            : node;
+    }
+
+    export function createPrefix(operator: PrefixUnaryOperator, operand: Expression) {
+        const node = <PrefixUnaryExpression>createSynthesizedNode(SyntaxKind.PrefixUnaryExpression);
+        node.operator = operator;
+        node.operand = parenthesizePrefixOperand(operand);
+        return node;
+    }
+
+    export function updatePrefix(node: PrefixUnaryExpression, operand: Expression) {
+        return node.operand !== operand
+            ? updateNode(createPrefix(node.operator, operand), node)
+            : node;
+    }
+
+    export function createPostfix(operand: Expression, operator: PostfixUnaryOperator) {
+        const node = <PostfixUnaryExpression>createSynthesizedNode(SyntaxKind.PostfixUnaryExpression);
+        node.operand = parenthesizePostfixOperand(operand);
+        node.operator = operator;
+        return node;
+    }
+
+    export function updatePostfix(node: PostfixUnaryExpression, operand: Expression) {
+        return node.operand !== operand
+            ? updateNode(createPostfix(operand, node.operator), node)
+            : node;
+    }
+
+    export function createBinary(left: Expression, operator: BinaryOperator | BinaryOperatorToken, right: Expression) {
+        const node = <BinaryExpression>createSynthesizedNode(SyntaxKind.BinaryExpression);
+        const operatorToken = asToken(operator);
+        const operatorKind = operatorToken.kind;
+        node.left = parenthesizeBinaryOperand(operatorKind, left, /*isLeftSideOfBinary*/ true, /*leftOperand*/ undefined);
+        node.operatorToken = operatorToken;
+        node.right = parenthesizeBinaryOperand(operatorKind, right, /*isLeftSideOfBinary*/ false, node.left);
+        return node;
+    }
+
+    export function updateBinary(node: BinaryExpression, left: Expression, right: Expression, operator?: BinaryOperator | BinaryOperatorToken) {
+        return node.left !== left
+            || node.right !== right
+            ? updateNode(createBinary(left, operator || node.operatorToken, right), node)
+            : node;
+    }
+
+    export function createConditional(condition: Expression, whenTrue: Expression, whenFalse: Expression): ConditionalExpression;
+    export function createConditional(condition: Expression, questionToken: QuestionToken, whenTrue: Expression, colonToken: ColonToken, whenFalse: Expression): ConditionalExpression;
+    export function createConditional(condition: Expression, questionTokenOrWhenTrue: QuestionToken | Expression, whenTrueOrWhenFalse: Expression, colonToken?: ColonToken, whenFalse?: Expression) {
+        const node = <ConditionalExpression>createSynthesizedNode(SyntaxKind.ConditionalExpression);
+        node.condition = parenthesizeForConditionalHead(condition);
+        node.questionToken = whenFalse ? <QuestionToken>questionTokenOrWhenTrue : createToken(SyntaxKind.QuestionToken);
+        node.whenTrue = parenthesizeSubexpressionOfConditionalExpression(whenFalse ? whenTrueOrWhenFalse : <Expression>questionTokenOrWhenTrue);
+        node.colonToken = whenFalse ? colonToken : createToken(SyntaxKind.ColonToken);
+        node.whenFalse = parenthesizeSubexpressionOfConditionalExpression(whenFalse ? whenFalse : whenTrueOrWhenFalse);
+        return node;
+    }
+
+    export function updateConditional(node: ConditionalExpression, condition: Expression, whenTrue: Expression, whenFalse: Expression) {
+        return node.condition !== condition
+            || node.whenTrue !== whenTrue
+            || node.whenFalse !== whenFalse
+            ? updateNode(createConditional(condition, node.questionToken, whenTrue, node.colonToken, whenFalse), node)
+            : node;
+    }
+
+    export function createTemplateExpression(head: TemplateHead, templateSpans: TemplateSpan[]) {
+        const node = <TemplateExpression>createSynthesizedNode(SyntaxKind.TemplateExpression);
+        node.head = head;
+        node.templateSpans = createNodeArray(templateSpans);
+        return node;
+    }
+
+    export function updateTemplateExpression(node: TemplateExpression, head: TemplateHead, templateSpans: TemplateSpan[]) {
+        return node.head !== head
+            || node.templateSpans !== templateSpans
+            ? updateNode(createTemplateExpression(head, templateSpans), node)
+            : node;
+    }
+
+    export function createYield(expression?: Expression): YieldExpression;
+    export function createYield(asteriskToken: AsteriskToken, expression: Expression): YieldExpression;
+    export function createYield(asteriskTokenOrExpression?: AsteriskToken | Expression, expression?: Expression) {
+        const node = <YieldExpression>createSynthesizedNode(SyntaxKind.YieldExpression);
+        node.asteriskToken = asteriskTokenOrExpression && asteriskTokenOrExpression.kind === SyntaxKind.AsteriskToken ? <AsteriskToken>asteriskTokenOrExpression : undefined;
+        node.expression = asteriskTokenOrExpression && asteriskTokenOrExpression.kind !== SyntaxKind.AsteriskToken ? <Expression>asteriskTokenOrExpression : expression;
+        return node;
+    }
+
+    export function updateYield(node: YieldExpression, asteriskToken: AsteriskToken | undefined, expression: Expression) {
+        return node.expression !== expression
+            || node.asteriskToken !== asteriskToken
+            ? updateNode(createYield(asteriskToken, expression), node)
+            : node;
+    }
+
+    export function createSpread(expression: Expression) {
+        const node = <SpreadElement>createSynthesizedNode(SyntaxKind.SpreadElement);
+        node.expression = parenthesizeExpressionForList(expression);
+        return node;
+    }
+
+    export function updateSpread(node: SpreadElement, expression: Expression) {
+        return node.expression !== expression
+            ? updateNode(createSpread(expression), node)
+            : node;
+    }
+
+    export function createClassExpression(modifiers: Modifier[] | undefined, name: string | Identifier | undefined, typeParameters: TypeParameterDeclaration[] | undefined, heritageClauses: HeritageClause[], members: ClassElement[]) {
+        const node = <ClassExpression>createSynthesizedNode(SyntaxKind.ClassExpression);
+        node.decorators = undefined;
+        node.modifiers = asNodeArray(modifiers);
+        node.name = asName(name);
+        node.typeParameters = asNodeArray(typeParameters);
+        node.heritageClauses = asNodeArray(heritageClauses);
+        node.members = createNodeArray(members);
         return node;
     }
 
-    export function createVariableDeclaration(name: string | BindingPattern | Identifier, type?: TypeNode, initializer?: Expression, location?: TextRange, flags?: NodeFlags): VariableDeclaration {
-        const node = <VariableDeclaration>createNode(SyntaxKind.VariableDeclaration, location, flags);
-        node.name = typeof name === "string" ? createIdentifier(name) : name;
+    export function updateClassExpression(node: ClassExpression, modifiers: Modifier[] | undefined, name: Identifier | undefined, typeParameters: TypeParameterDeclaration[] | undefined, heritageClauses: HeritageClause[], members: ClassElement[]) {
+        return node.modifiers !== modifiers
+            || node.name !== name
+            || node.typeParameters !== typeParameters
+            || node.heritageClauses !== heritageClauses
+            || node.members !== members
+            ? updateNode(createClassExpression(modifiers, name, typeParameters, heritageClauses, members), node)
+            : node;
+    }
+
+    export function createOmittedExpression() {
+        return <OmittedExpression>createSynthesizedNode(SyntaxKind.OmittedExpression);
+    }
+
+    export function createExpressionWithTypeArguments(typeArguments: TypeNode[], expression: Expression) {
+        const node = <ExpressionWithTypeArguments>createSynthesizedNode(SyntaxKind.ExpressionWithTypeArguments);
+        node.expression = parenthesizeForAccess(expression);
+        node.typeArguments = asNodeArray(typeArguments);
+        return node;
+    }
+
+    export function updateExpressionWithTypeArguments(node: ExpressionWithTypeArguments, typeArguments: TypeNode[], expression: Expression) {
+        return node.typeArguments !== typeArguments
+            || node.expression !== expression
+            ? updateNode(createExpressionWithTypeArguments(typeArguments, expression), node)
+            : node;
+    }
+
+    export function createAsExpression(expression: Expression, type: TypeNode) {
+        const node = <AsExpression>createSynthesizedNode(SyntaxKind.AsExpression);
+        node.expression = expression;
         node.type = type;
-        node.initializer = initializer !== undefined ? parenthesizeExpressionForList(initializer) : undefined;
         return node;
     }
 
-    export function updateVariableDeclaration(node: VariableDeclaration, name: BindingName, type: TypeNode, initializer: Expression) {
-        if (node.name !== name || node.type !== type || node.initializer !== initializer) {
-            return updateNode(createVariableDeclaration(name, type, initializer, /*location*/ node, node.flags), node);
-        }
+    export function updateAsExpression(node: AsExpression, expression: Expression, type: TypeNode) {
+        return node.expression !== expression
+            || node.type !== type
+            ? updateNode(createAsExpression(expression, type), node)
+            : node;
+    }
+
+    export function createNonNullExpression(expression: Expression) {
+        const node = <NonNullExpression>createSynthesizedNode(SyntaxKind.NonNullExpression);
+        node.expression = parenthesizeForAccess(expression);
         return node;
     }
 
-    export function createEmptyStatement(location: TextRange) {
-        return <EmptyStatement>createNode(SyntaxKind.EmptyStatement, location);
+    export function updateNonNullExpression(node: NonNullExpression, expression: Expression) {
+        return node.expression !== expression
+            ? updateNode(createNonNullExpression(expression), node)
+            : node;
     }
 
-    export function createStatement(expression: Expression, location?: TextRange, flags?: NodeFlags): ExpressionStatement {
-        const node = <ExpressionStatement>createNode(SyntaxKind.ExpressionStatement, location, flags);
-        node.expression = parenthesizeExpressionForExpressionStatement(expression);
+    export function createMetaProperty(keywordToken: MetaProperty["keywordToken"], name: Identifier) {
+        const node = <MetaProperty>createSynthesizedNode(SyntaxKind.MetaProperty);
+        node.keywordToken = keywordToken;
+        node.name = name;
         return node;
     }
 
-    export function updateStatement(node: ExpressionStatement, expression: Expression) {
-        if (node.expression !== expression) {
-            return updateNode(createStatement(expression, /*location*/ node, node.flags), node);
-        }
+    export function updateMetaProperty(node: MetaProperty, name: Identifier) {
+        return node.name !== name
+            ? updateNode(createMetaProperty(node.keywordToken, name), node)
+            : node;
+    }
+
+    // Misc
+
+    export function createTemplateSpan(expression: Expression, literal: TemplateMiddle | TemplateTail) {
+        const node = <TemplateSpan>createSynthesizedNode(SyntaxKind.TemplateSpan);
+        node.expression = expression;
+        node.literal = literal;
+        return node;
+    }
+
+    export function updateTemplateSpan(node: TemplateSpan, expression: Expression, literal: TemplateMiddle | TemplateTail) {
+        return node.expression !== expression
+            || node.literal !== literal
+            ? updateNode(createTemplateSpan(expression, literal), node)
+            : node;
+    }
 
+    export function createSemicolonClassElement() {
+        return <SemicolonClassElement>createSynthesizedNode(SyntaxKind.SemicolonClassElement);
+    }
+
+    // Element
+
+    export function createBlock(statements: Statement[], multiLine?: boolean): Block {
+        const block = <Block>createSynthesizedNode(SyntaxKind.Block);
+        block.statements = createNodeArray(statements);
+        if (multiLine) block.multiLine = multiLine;
+        return block;
+    }
+
+    export function updateBlock(node: Block, statements: Statement[]) {
+        return node.statements !== statements
+            ? updateNode(createBlock(statements, node.multiLine), node)
+            : node;
+    }
+
+    export function createVariableStatement(modifiers: Modifier[] | undefined, declarationList: VariableDeclarationList | VariableDeclaration[]) {
+        const node = <VariableStatement>createSynthesizedNode(SyntaxKind.VariableStatement);
+        node.decorators = undefined;
+        node.modifiers = asNodeArray(modifiers);
+        node.declarationList = isArray(declarationList) ? createVariableDeclarationList(declarationList) : declarationList;
+        return node;
+    }
+
+    export function updateVariableStatement(node: VariableStatement, modifiers: Modifier[] | undefined, declarationList: VariableDeclarationList) {
+        return node.modifiers !== modifiers
+            || node.declarationList !== declarationList
+            ? updateNode(createVariableStatement(modifiers, declarationList), node)
+            : node;
+    }
+
+    export function createEmptyStatement() {
+        return <EmptyStatement>createSynthesizedNode(SyntaxKind.EmptyStatement);
+    }
+
+    export function createStatement(expression: Expression) {
+        const node = <ExpressionStatement>createSynthesizedNode(SyntaxKind.ExpressionStatement);
+        node.expression = parenthesizeExpressionForExpressionStatement(expression);
         return node;
     }
 
-    export function createIf(expression: Expression, thenStatement: Statement, elseStatement?: Statement, location?: TextRange) {
-        const node = <IfStatement>createNode(SyntaxKind.IfStatement, location);
+    export function updateStatement(node: ExpressionStatement, expression: Expression) {
+        return node.expression !== expression
+            ? updateNode(createStatement(expression), node)
+            : node;
+    }
+
+    export function createIf(expression: Expression, thenStatement: Statement, elseStatement?: Statement) {
+        const node = <IfStatement>createSynthesizedNode(SyntaxKind.IfStatement);
         node.expression = expression;
         node.thenStatement = thenStatement;
         node.elseStatement = elseStatement;
         return node;
     }
 
-    export function updateIf(node: IfStatement, expression: Expression, thenStatement: Statement, elseStatement: Statement) {
-        if (node.expression !== expression || node.thenStatement !== thenStatement || node.elseStatement !== elseStatement) {
-            return updateNode(createIf(expression, thenStatement, elseStatement, /*location*/ node), node);
-        }
-        return node;
+    export function updateIf(node: IfStatement, expression: Expression, thenStatement: Statement, elseStatement: Statement | undefined) {
+        return node.expression !== expression
+            || node.thenStatement !== thenStatement
+            || node.elseStatement !== elseStatement
+            ? updateNode(createIf(expression, thenStatement, elseStatement), node)
+            : node;
     }
 
-    export function createDo(statement: Statement, expression: Expression, location?: TextRange) {
-        const node = <DoStatement>createNode(SyntaxKind.DoStatement, location);
+    export function createDo(statement: Statement, expression: Expression) {
+        const node = <DoStatement>createSynthesizedNode(SyntaxKind.DoStatement);
         node.statement = statement;
         node.expression = expression;
         return node;
     }
 
     export function updateDo(node: DoStatement, statement: Statement, expression: Expression) {
-        if (node.statement !== statement || node.expression !== expression) {
-            return updateNode(createDo(statement, expression, node), node);
-        }
-        return node;
+        return node.statement !== statement
+            || node.expression !== expression
+            ? updateNode(createDo(statement, expression), node)
+            : node;
     }
 
-    export function createWhile(expression: Expression, statement: Statement, location?: TextRange) {
-        const node = <WhileStatement>createNode(SyntaxKind.WhileStatement, location);
+    export function createWhile(expression: Expression, statement: Statement) {
+        const node = <WhileStatement>createSynthesizedNode(SyntaxKind.WhileStatement);
         node.expression = expression;
         node.statement = statement;
         return node;
     }
 
     export function updateWhile(node: WhileStatement, expression: Expression, statement: Statement) {
-        if (node.expression !== expression || node.statement !== statement) {
-            return updateNode(createWhile(expression, statement, node), node);
-        }
-        return node;
+        return node.expression !== expression
+            || node.statement !== statement
+            ? updateNode(createWhile(expression, statement), node)
+            : node;
     }
 
-    export function createFor(initializer: ForInitializer, condition: Expression, incrementor: Expression, statement: Statement, location?: TextRange) {
-        const node = <ForStatement>createNode(SyntaxKind.ForStatement, location, /*flags*/ undefined);
+    export function createFor(initializer: ForInitializer | undefined, condition: Expression | undefined, incrementor: Expression | undefined, statement: Statement) {
+        const node = <ForStatement>createSynthesizedNode(SyntaxKind.ForStatement);
         node.initializer = initializer;
         node.condition = condition;
         node.incrementor = incrementor;
@@ -902,15 +1250,17 @@ namespace ts {
         return node;
     }
 
-    export function updateFor(node: ForStatement, initializer: ForInitializer, condition: Expression, incrementor: Expression, statement: Statement) {
-        if (node.initializer !== initializer || node.condition !== condition || node.incrementor !== incrementor || node.statement !== statement) {
-            return updateNode(createFor(initializer, condition, incrementor, statement, node), node);
-        }
-        return node;
+    export function updateFor(node: ForStatement, initializer: ForInitializer | undefined, condition: Expression | undefined, incrementor: Expression | undefined, statement: Statement) {
+        return node.initializer !== initializer
+            || node.condition !== condition
+            || node.incrementor !== incrementor
+            || node.statement !== statement
+            ? updateNode(createFor(initializer, condition, incrementor, statement), node)
+            : node;
     }
 
-    export function createForIn(initializer: ForInitializer, expression: Expression, statement: Statement, location?: TextRange) {
-        const node = <ForInStatement>createNode(SyntaxKind.ForInStatement, location);
+    export function createForIn(initializer: ForInitializer, expression: Expression, statement: Statement) {
+        const node = <ForInStatement>createSynthesizedNode(SyntaxKind.ForInStatement);
         node.initializer = initializer;
         node.expression = expression;
         node.statement = statement;
@@ -918,324 +1268,500 @@ namespace ts {
     }
 
     export function updateForIn(node: ForInStatement, initializer: ForInitializer, expression: Expression, statement: Statement) {
-        if (node.initializer !== initializer || node.expression !== expression || node.statement !== statement) {
-            return updateNode(createForIn(initializer, expression, statement, node), node);
-        }
-        return node;
+        return node.initializer !== initializer
+            || node.expression !== expression
+            || node.statement !== statement
+            ? updateNode(createForIn(initializer, expression, statement), node)
+            : node;
     }
 
-    export function createForOf(initializer: ForInitializer, expression: Expression, statement: Statement, location?: TextRange) {
-        const node = <ForOfStatement>createNode(SyntaxKind.ForOfStatement, location);
+    export function createForOf(awaitModifier: AwaitKeywordToken, initializer: ForInitializer, expression: Expression, statement: Statement) {
+        const node = <ForOfStatement>createSynthesizedNode(SyntaxKind.ForOfStatement);
+        node.awaitModifier = awaitModifier;
         node.initializer = initializer;
         node.expression = expression;
         node.statement = statement;
         return node;
     }
 
-    export function updateForOf(node: ForInStatement, initializer: ForInitializer, expression: Expression, statement: Statement) {
-        if (node.initializer !== initializer || node.expression !== expression || node.statement !== statement) {
-            return updateNode(createForOf(initializer, expression, statement, node), node);
-        }
-        return node;
+    export function updateForOf(node: ForOfStatement, awaitModifier: AwaitKeywordToken, initializer: ForInitializer, expression: Expression, statement: Statement) {
+        return node.awaitModifier !== awaitModifier
+            || node.initializer !== initializer
+            || node.expression !== expression
+            || node.statement !== statement
+            ? updateNode(createForOf(awaitModifier, initializer, expression, statement), node)
+            : node;
     }
 
-    export function createContinue(label?: Identifier, location?: TextRange): BreakStatement {
-        const node = <ContinueStatement>createNode(SyntaxKind.ContinueStatement, location);
-        if (label) {
-            node.label = label;
-        }
+    export function createContinue(label?: string | Identifier): ContinueStatement {
+        const node = <ContinueStatement>createSynthesizedNode(SyntaxKind.ContinueStatement);
+        node.label = asName(label);
         return node;
     }
 
-    export function updateContinue(node: ContinueStatement, label: Identifier) {
-        if (node.label !== label) {
-            return updateNode(createContinue(label, node), node);
-        }
-        return node;
+    export function updateContinue(node: ContinueStatement, label: Identifier | undefined) {
+        return node.label !== label
+            ? updateNode(createContinue(label), node)
+            : node;
     }
 
-    export function createBreak(label?: Identifier, location?: TextRange): BreakStatement {
-        const node = <BreakStatement>createNode(SyntaxKind.BreakStatement, location);
-        if (label) {
-            node.label = label;
-        }
+    export function createBreak(label?: string | Identifier): BreakStatement {
+        const node = <BreakStatement>createSynthesizedNode(SyntaxKind.BreakStatement);
+        node.label = asName(label);
         return node;
     }
 
-    export function updateBreak(node: BreakStatement, label: Identifier) {
-        if (node.label !== label) {
-            return updateNode(createBreak(label, node), node);
-        }
-        return node;
+    export function updateBreak(node: BreakStatement, label: Identifier | undefined) {
+        return node.label !== label
+            ? updateNode(createBreak(label), node)
+            : node;
     }
 
-    export function createReturn(expression?: Expression, location?: TextRange): ReturnStatement {
-        const node = <ReturnStatement>createNode(SyntaxKind.ReturnStatement, location);
+    export function createReturn(expression?: Expression): ReturnStatement {
+        const node = <ReturnStatement>createSynthesizedNode(SyntaxKind.ReturnStatement);
         node.expression = expression;
         return node;
     }
 
-    export function updateReturn(node: ReturnStatement, expression: Expression) {
-        if (node.expression !== expression) {
-            return updateNode(createReturn(expression, /*location*/ node), node);
-        }
-        return node;
+    export function updateReturn(node: ReturnStatement, expression: Expression | undefined) {
+        return node.expression !== expression
+            ? updateNode(createReturn(expression), node)
+            : node;
     }
 
-    export function createWith(expression: Expression, statement: Statement, location?: TextRange) {
-        const node = <WithStatement>createNode(SyntaxKind.WithStatement, location);
+    export function createWith(expression: Expression, statement: Statement) {
+        const node = <WithStatement>createSynthesizedNode(SyntaxKind.WithStatement);
         node.expression = expression;
         node.statement = statement;
         return node;
     }
 
     export function updateWith(node: WithStatement, expression: Expression, statement: Statement) {
-        if (node.expression !== expression || node.statement !== statement) {
-            return updateNode(createWith(expression, statement, node), node);
-        }
-        return node;
+        return node.expression !== expression
+            || node.statement !== statement
+            ? updateNode(createWith(expression, statement), node)
+            : node;
     }
 
-    export function createSwitch(expression: Expression, caseBlock: CaseBlock, location?: TextRange): SwitchStatement {
-        const node = <SwitchStatement>createNode(SyntaxKind.SwitchStatement, location);
+    export function createSwitch(expression: Expression, caseBlock: CaseBlock): SwitchStatement {
+        const node = <SwitchStatement>createSynthesizedNode(SyntaxKind.SwitchStatement);
         node.expression = parenthesizeExpressionForList(expression);
         node.caseBlock = caseBlock;
         return node;
     }
 
     export function updateSwitch(node: SwitchStatement, expression: Expression, caseBlock: CaseBlock) {
-        if (node.expression !== expression || node.caseBlock !== caseBlock) {
-            return updateNode(createSwitch(expression, caseBlock, node), node);
-        }
-        return node;
+        return node.expression !== expression
+            || node.caseBlock !== caseBlock
+            ? updateNode(createSwitch(expression, caseBlock), node)
+            : node;
     }
 
-    export function createLabel(label: string | Identifier, statement: Statement, location?: TextRange) {
-        const node = <LabeledStatement>createNode(SyntaxKind.LabeledStatement, location);
-        node.label = typeof label === "string" ? createIdentifier(label) : label;
+    export function createLabel(label: string | Identifier, statement: Statement) {
+        const node = <LabeledStatement>createSynthesizedNode(SyntaxKind.LabeledStatement);
+        node.label = asName(label);
         node.statement = statement;
         return node;
     }
 
     export function updateLabel(node: LabeledStatement, label: Identifier, statement: Statement) {
-        if (node.label !== label || node.statement !== statement) {
-            return updateNode(createLabel(label, statement, node), node);
-        }
-        return node;
+        return node.label !== label
+            || node.statement !== statement
+            ? updateNode(createLabel(label, statement), node)
+            : node;
     }
 
-    export function createThrow(expression: Expression, location?: TextRange) {
-        const node = <ThrowStatement>createNode(SyntaxKind.ThrowStatement, location);
+    export function createThrow(expression: Expression) {
+        const node = <ThrowStatement>createSynthesizedNode(SyntaxKind.ThrowStatement);
         node.expression = expression;
         return node;
     }
 
     export function updateThrow(node: ThrowStatement, expression: Expression) {
-        if (node.expression !== expression) {
-            return updateNode(createThrow(expression, node), node);
-        }
-        return node;
+        return node.expression !== expression
+            ? updateNode(createThrow(expression), node)
+            : node;
     }
 
-    export function createTry(tryBlock: Block, catchClause: CatchClause, finallyBlock: Block, location?: TextRange) {
-        const node = <TryStatement>createNode(SyntaxKind.TryStatement, location);
+    export function createTry(tryBlock: Block, catchClause: CatchClause | undefined, finallyBlock: Block | undefined) {
+        const node = <TryStatement>createSynthesizedNode(SyntaxKind.TryStatement);
         node.tryBlock = tryBlock;
         node.catchClause = catchClause;
         node.finallyBlock = finallyBlock;
         return node;
     }
 
-    export function updateTry(node: TryStatement, tryBlock: Block, catchClause: CatchClause, finallyBlock: Block) {
-        if (node.tryBlock !== tryBlock || node.catchClause !== catchClause || node.finallyBlock !== finallyBlock) {
-            return updateNode(createTry(tryBlock, catchClause, finallyBlock, node), node);
-        }
-        return node;
+    export function updateTry(node: TryStatement, tryBlock: Block, catchClause: CatchClause | undefined, finallyBlock: Block | undefined) {
+        return node.tryBlock !== tryBlock
+            || node.catchClause !== catchClause
+            || node.finallyBlock !== finallyBlock
+            ? updateNode(createTry(tryBlock, catchClause, finallyBlock), node)
+            : node;
     }
 
-    export function createCaseBlock(clauses: CaseOrDefaultClause[], location?: TextRange): CaseBlock {
-        const node = <CaseBlock>createNode(SyntaxKind.CaseBlock, location);
-        node.clauses = createNodeArray(clauses);
+    export function createDebuggerStatement() {
+        return <DebuggerStatement>createSynthesizedNode(SyntaxKind.DebuggerStatement);
+    }
+
+    export function createVariableDeclaration(name: string | BindingName, type?: TypeNode, initializer?: Expression) {
+        const node = <VariableDeclaration>createSynthesizedNode(SyntaxKind.VariableDeclaration);
+        node.name = asName(name);
+        node.type = type;
+        node.initializer = initializer !== undefined ? parenthesizeExpressionForList(initializer) : undefined;
         return node;
     }
 
-    export function updateCaseBlock(node: CaseBlock, clauses: CaseOrDefaultClause[]) {
-        if (node.clauses !== clauses) {
-            return updateNode(createCaseBlock(clauses, node), node);
-        }
+    export function updateVariableDeclaration(node: VariableDeclaration, name: BindingName, type: TypeNode | undefined, initializer: Expression | undefined) {
+        return node.name !== name
+            || node.type !== type
+            || node.initializer !== initializer
+            ? updateNode(createVariableDeclaration(name, type, initializer), node)
+            : node;
+    }
+
+    export function createVariableDeclarationList(declarations: VariableDeclaration[], flags?: NodeFlags) {
+        const node = <VariableDeclarationList>createSynthesizedNode(SyntaxKind.VariableDeclarationList);
+        node.flags |= flags & NodeFlags.BlockScoped;
+        node.declarations = createNodeArray(declarations);
         return node;
     }
 
-    export function createFunctionDeclaration(decorators: Decorator[], modifiers: Modifier[], asteriskToken: Node, name: string | Identifier, typeParameters: TypeParameterDeclaration[], parameters: ParameterDeclaration[], type: TypeNode, body: Block, location?: TextRange, flags?: NodeFlags) {
-        const node = <FunctionDeclaration>createNode(SyntaxKind.FunctionDeclaration, location, flags);
-        node.decorators = decorators ? createNodeArray(decorators) : undefined;
-        node.modifiers = modifiers ? createNodeArray(modifiers) : undefined;
+    export function updateVariableDeclarationList(node: VariableDeclarationList, declarations: VariableDeclaration[]) {
+        return node.declarations !== declarations
+            ? updateNode(createVariableDeclarationList(declarations, node.flags), node)
+            : node;
+    }
+
+    export function createFunctionDeclaration(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, asteriskToken: AsteriskToken | undefined, name: string | Identifier | undefined, typeParameters: TypeParameterDeclaration[] | undefined, parameters: ParameterDeclaration[], type: TypeNode | undefined, body: Block | undefined) {
+        const node = <FunctionDeclaration>createSynthesizedNode(SyntaxKind.FunctionDeclaration);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
         node.asteriskToken = asteriskToken;
-        node.name = typeof name === "string" ? createIdentifier(name) : name;
-        node.typeParameters = typeParameters ? createNodeArray(typeParameters) : undefined;
+        node.name = asName(name);
+        node.typeParameters = asNodeArray(typeParameters);
         node.parameters = createNodeArray(parameters);
         node.type = type;
         node.body = body;
         return node;
     }
 
-    export function updateFunctionDeclaration(node: FunctionDeclaration, decorators: Decorator[], modifiers: Modifier[], name: Identifier, typeParameters: TypeParameterDeclaration[], parameters: ParameterDeclaration[], type: TypeNode, body: Block) {
-        if (node.decorators !== decorators || node.modifiers !== modifiers || node.name !== name || node.typeParameters !== typeParameters || node.parameters !== parameters || node.type !== type || node.body !== body) {
-            return updateNode(createFunctionDeclaration(decorators, modifiers, node.asteriskToken, name, typeParameters, parameters, type, body, /*location*/ node, node.flags), node);
-        }
-        return node;
+    export function updateFunctionDeclaration(node: FunctionDeclaration, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, asteriskToken: AsteriskToken | undefined, name: Identifier | undefined, typeParameters: TypeParameterDeclaration[] | undefined, parameters: ParameterDeclaration[], type: TypeNode | undefined, body: Block | undefined) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.asteriskToken !== asteriskToken
+            || node.name !== name
+            || node.typeParameters !== typeParameters
+            || node.parameters !== parameters
+            || node.type !== type
+            || node.body !== body
+            ? updateNode(createFunctionDeclaration(decorators, modifiers, asteriskToken, name, typeParameters, parameters, type, body), node)
+            : node;
     }
 
-    export function createClassDeclaration(decorators: Decorator[], modifiers: Modifier[], name: Identifier, typeParameters: TypeParameterDeclaration[], heritageClauses: HeritageClause[], members: ClassElement[], location?: TextRange) {
-        const node = <ClassDeclaration>createNode(SyntaxKind.ClassDeclaration, location);
-        node.decorators = decorators ? createNodeArray(decorators) : undefined;
-        node.modifiers = modifiers ? createNodeArray(modifiers) : undefined;
-        node.name = name;
-        node.typeParameters = typeParameters ? createNodeArray(typeParameters) : undefined;
-        node.heritageClauses = createNodeArray(heritageClauses);
+    export function createClassDeclaration(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: string | Identifier | undefined, typeParameters: TypeParameterDeclaration[] | undefined, heritageClauses: HeritageClause[], members: ClassElement[]) {
+        const node = <ClassDeclaration>createSynthesizedNode(SyntaxKind.ClassDeclaration);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.name = asName(name);
+        node.typeParameters = asNodeArray(typeParameters);
+        node.heritageClauses = asNodeArray(heritageClauses);
         node.members = createNodeArray(members);
         return node;
     }
 
-    export function updateClassDeclaration(node: ClassDeclaration, decorators: Decorator[], modifiers: Modifier[], name: Identifier, typeParameters: TypeParameterDeclaration[], heritageClauses: HeritageClause[], members: ClassElement[]) {
-        if (node.decorators !== decorators || node.modifiers !== modifiers || node.name !== name || node.typeParameters !== typeParameters || node.heritageClauses !== heritageClauses || node.members !== members) {
-            return updateNode(createClassDeclaration(decorators, modifiers, name, typeParameters, heritageClauses, members, node), node);
-        }
-        return node;
+    export function updateClassDeclaration(node: ClassDeclaration, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: Identifier | undefined, typeParameters: TypeParameterDeclaration[] | undefined, heritageClauses: HeritageClause[], members: ClassElement[]) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.name !== name
+            || node.typeParameters !== typeParameters
+            || node.heritageClauses !== heritageClauses
+            || node.members !== members
+            ? updateNode(createClassDeclaration(decorators, modifiers, name, typeParameters, heritageClauses, members), node)
+            : node;
     }
 
-    export function createImportDeclaration(decorators: Decorator[], modifiers: Modifier[], importClause: ImportClause, moduleSpecifier?: Expression, location?: TextRange): ImportDeclaration {
-        const node = <ImportDeclaration>createNode(SyntaxKind.ImportDeclaration, location);
-        node.decorators = decorators ? createNodeArray(decorators) : undefined;
-        node.modifiers = modifiers ? createNodeArray(modifiers) : undefined;
-        node.importClause = importClause;
-        node.moduleSpecifier = moduleSpecifier;
+    export function createInterfaceDeclaration(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: string | Identifier, typeParameters: TypeParameterDeclaration[] | undefined, heritageClauses: HeritageClause[] | undefined, members: TypeElement[]) {
+        const node = <InterfaceDeclaration>createSynthesizedNode(SyntaxKind.InterfaceDeclaration);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.name = asName(name);
+        node.typeParameters = asNodeArray(typeParameters);
+        node.heritageClauses = asNodeArray(heritageClauses);
+        node.members = createNodeArray(members);
         return node;
     }
 
-    export function updateImportDeclaration(node: ImportDeclaration, decorators: Decorator[], modifiers: Modifier[], importClause: ImportClause, moduleSpecifier: Expression) {
-        if (node.decorators !== decorators || node.modifiers !== modifiers || node.importClause !== importClause || node.moduleSpecifier !== moduleSpecifier) {
-            return updateNode(createImportDeclaration(decorators, modifiers, importClause, moduleSpecifier, node), node);
-        }
-        return node;
+    export function updateInterfaceDeclaration(node: InterfaceDeclaration, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: Identifier, typeParameters: TypeParameterDeclaration[] | undefined, heritageClauses: HeritageClause[] | undefined, members: TypeElement[]) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.name !== name
+            || node.typeParameters !== typeParameters
+            || node.heritageClauses !== heritageClauses
+            || node.members !== members
+            ? updateNode(createInterfaceDeclaration(decorators, modifiers, name, typeParameters, heritageClauses, members), node)
+            : node;
     }
 
-    export function createImportClause(name: Identifier, namedBindings: NamedImportBindings, location?: TextRange): ImportClause {
-        const node = <ImportClause>createNode(SyntaxKind.ImportClause, location);
-        node.name = name;
-        node.namedBindings = namedBindings;
+    export function createTypeAliasDeclaration(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: string | Identifier, typeParameters: TypeParameterDeclaration[] | undefined, type: TypeNode) {
+        const node = <TypeAliasDeclaration>createSynthesizedNode(SyntaxKind.TypeAliasDeclaration);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.name = asName(name);
+        node.typeParameters = asNodeArray(typeParameters);
+        node.type = type;
         return node;
     }
 
-    export function updateImportClause(node: ImportClause, name: Identifier, namedBindings: NamedImportBindings) {
-        if (node.name !== name || node.namedBindings !== namedBindings) {
-            return updateNode(createImportClause(name, namedBindings, node), node);
-        }
-        return node;
+    export function updateTypeAliasDeclaration(node: TypeAliasDeclaration, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: Identifier, typeParameters: TypeParameterDeclaration[] | undefined, type: TypeNode) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.name !== name
+            || node.typeParameters !== typeParameters
+            || node.type !== type
+            ? updateNode(createTypeAliasDeclaration(decorators, modifiers, name, typeParameters, type), node)
+            : node;
     }
 
-    export function createNamespaceImport(name: Identifier, location?: TextRange): NamespaceImport {
-        const node = <NamespaceImport>createNode(SyntaxKind.NamespaceImport, location);
-        node.name = name;
+    export function createEnumDeclaration(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: string | Identifier, members: EnumMember[]) {
+        const node = <EnumDeclaration>createSynthesizedNode(SyntaxKind.EnumDeclaration);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.name = asName(name);
+        node.members = createNodeArray(members);
         return node;
     }
 
-    export function updateNamespaceImport(node: NamespaceImport, name: Identifier) {
-        if (node.name !== name) {
-            return updateNode(createNamespaceImport(name, node), node);
-        }
-        return node;
+    export function updateEnumDeclaration(node: EnumDeclaration, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: Identifier, members: EnumMember[]) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.name !== name
+            || node.members !== members
+            ? updateNode(createEnumDeclaration(decorators, modifiers, name, members), node)
+            : node;
     }
 
-    export function createNamedImports(elements: ImportSpecifier[], location?: TextRange): NamedImports {
-        const node = <NamedImports>createNode(SyntaxKind.NamedImports, location);
-        node.elements = createNodeArray(elements);
+    export function createModuleDeclaration(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: ModuleName, body: ModuleBody | undefined, flags?: NodeFlags) {
+        const node = <ModuleDeclaration>createSynthesizedNode(SyntaxKind.ModuleDeclaration);
+        node.flags |= flags & (NodeFlags.Namespace | NodeFlags.NestedNamespace | NodeFlags.GlobalAugmentation);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.name = name;
+        node.body = body;
         return node;
     }
 
-    export function updateNamedImports(node: NamedImports, elements: ImportSpecifier[]) {
-        if (node.elements !== elements) {
-            return updateNode(createNamedImports(elements, node), node);
-        }
-        return node;
+    export function updateModuleDeclaration(node: ModuleDeclaration, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: ModuleName, body: ModuleBody | undefined) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.name !== name
+            || node.body !== body
+            ? updateNode(createModuleDeclaration(decorators, modifiers, name, body, node.flags), node)
+            : node;
     }
 
-    export function createImportSpecifier(propertyName: Identifier, name: Identifier, location?: TextRange) {
-        const node = <ImportSpecifier>createNode(SyntaxKind.ImportSpecifier, location);
-        node.propertyName = propertyName;
+    export function createModuleBlock(statements: Statement[]) {
+        const node = <ModuleBlock>createSynthesizedNode(SyntaxKind.ModuleBlock);
+        node.statements = createNodeArray(statements);
+        return node;
+    }
+
+    export function updateModuleBlock(node: ModuleBlock, statements: Statement[]) {
+        return node.statements !== statements
+            ? updateNode(createModuleBlock(statements), node)
+            : node;
+    }
+
+    export function createCaseBlock(clauses: CaseOrDefaultClause[]): CaseBlock {
+        const node = <CaseBlock>createSynthesizedNode(SyntaxKind.CaseBlock);
+        node.clauses = createNodeArray(clauses);
+        return node;
+    }
+
+    export function updateCaseBlock(node: CaseBlock, clauses: CaseOrDefaultClause[]) {
+        return node.clauses !== clauses
+            ? updateNode(createCaseBlock(clauses), node)
+            : node;
+    }
+
+    export function createNamespaceExportDeclaration(name: string | Identifier) {
+        const node = <NamespaceExportDeclaration>createSynthesizedNode(SyntaxKind.NamespaceExportDeclaration);
+        node.name = asName(name);
+        return node;
+    }
+
+    export function updateNamespaceExportDeclaration(node: NamespaceExportDeclaration, name: Identifier) {
+        return node.name !== name
+            ? updateNode(createNamespaceExportDeclaration(name), node)
+            : node;
+    }
+
+    export function createImportEqualsDeclaration(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: string | Identifier, moduleReference: ModuleReference) {
+        const node = <ImportEqualsDeclaration>createSynthesizedNode(SyntaxKind.ImportEqualsDeclaration);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.name = asName(name);
+        node.moduleReference = moduleReference;
+        return node;
+    }
+
+    export function updateImportEqualsDeclaration(node: ImportEqualsDeclaration, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, name: Identifier, moduleReference: ModuleReference) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.name !== name
+            || node.moduleReference !== moduleReference
+            ? updateNode(createImportEqualsDeclaration(decorators, modifiers, name, moduleReference), node)
+            : node;
+    }
+
+    export function createImportDeclaration(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, importClause: ImportClause | undefined, moduleSpecifier?: Expression): ImportDeclaration {
+        const node = <ImportDeclaration>createSynthesizedNode(SyntaxKind.ImportDeclaration);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
+        node.importClause = importClause;
+        node.moduleSpecifier = moduleSpecifier;
+        return node;
+    }
+
+    export function updateImportDeclaration(node: ImportDeclaration, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, importClause: ImportClause | undefined, moduleSpecifier: Expression | undefined) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.importClause !== importClause
+            || node.moduleSpecifier !== moduleSpecifier
+            ? updateNode(createImportDeclaration(decorators, modifiers, importClause, moduleSpecifier), node)
+            : node;
+    }
+
+    export function createImportClause(name: Identifier | undefined, namedBindings: NamedImportBindings | undefined): ImportClause {
+        const node = <ImportClause>createSynthesizedNode(SyntaxKind.ImportClause);
         node.name = name;
+        node.namedBindings = namedBindings;
         return node;
     }
 
-    export function updateImportSpecifier(node: ImportSpecifier, propertyName: Identifier, name: Identifier) {
-        if (node.propertyName !== propertyName || node.name !== name) {
-            return updateNode(createImportSpecifier(propertyName, name, node), node);
-        }
+    export function updateImportClause(node: ImportClause, name: Identifier | undefined, namedBindings: NamedImportBindings | undefined) {
+        return node.name !== name
+            || node.namedBindings !== namedBindings
+            ? updateNode(createImportClause(name, namedBindings), node)
+            : node;
+    }
+
+    export function createNamespaceImport(name: Identifier): NamespaceImport {
+        const node = <NamespaceImport>createSynthesizedNode(SyntaxKind.NamespaceImport);
+        node.name = name;
+        return node;
+    }
+
+    export function updateNamespaceImport(node: NamespaceImport, name: Identifier) {
+        return node.name !== name
+            ? updateNode(createNamespaceImport(name), node)
+            : node;
+    }
+
+    export function createNamedImports(elements: ImportSpecifier[]): NamedImports {
+        const node = <NamedImports>createSynthesizedNode(SyntaxKind.NamedImports);
+        node.elements = createNodeArray(elements);
+        return node;
+    }
+
+    export function updateNamedImports(node: NamedImports, elements: ImportSpecifier[]) {
+        return node.elements !== elements
+            ? updateNode(createNamedImports(elements), node)
+            : node;
+    }
+
+    export function createImportSpecifier(propertyName: Identifier | undefined, name: Identifier) {
+        const node = <ImportSpecifier>createSynthesizedNode(SyntaxKind.ImportSpecifier);
+        node.propertyName = propertyName;
+        node.name = name;
         return node;
     }
 
-    export function createExportAssignment(decorators: Decorator[], modifiers: Modifier[], isExportEquals: boolean, expression: Expression, location?: TextRange) {
-        const node = <ExportAssignment>createNode(SyntaxKind.ExportAssignment, location);
-        node.decorators = decorators ? createNodeArray(decorators) : undefined;
-        node.modifiers = modifiers ? createNodeArray(modifiers) : undefined;
+    export function updateImportSpecifier(node: ImportSpecifier, propertyName: Identifier | undefined, name: Identifier) {
+        return node.propertyName !== propertyName
+            || node.name !== name
+            ? updateNode(createImportSpecifier(propertyName, name), node)
+            : node;
+    }
+
+    export function createExportAssignment(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, isExportEquals: boolean, expression: Expression) {
+        const node = <ExportAssignment>createSynthesizedNode(SyntaxKind.ExportAssignment);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
         node.isExportEquals = isExportEquals;
         node.expression = expression;
         return node;
     }
 
-    export function updateExportAssignment(node: ExportAssignment, decorators: Decorator[], modifiers: Modifier[], expression: Expression) {
-        if (node.decorators !== decorators || node.modifiers !== modifiers || node.expression !== expression) {
-            return updateNode(createExportAssignment(decorators, modifiers, node.isExportEquals, expression, node), node);
-        }
-        return node;
+    export function updateExportAssignment(node: ExportAssignment, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, expression: Expression) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.expression !== expression
+            ? updateNode(createExportAssignment(decorators, modifiers, node.isExportEquals, expression), node)
+            : node;
     }
 
-    export function createExportDeclaration(decorators: Decorator[], modifiers: Modifier[], exportClause: NamedExports, moduleSpecifier?: Expression, location?: TextRange) {
-        const node = <ExportDeclaration>createNode(SyntaxKind.ExportDeclaration, location);
-        node.decorators = decorators ? createNodeArray(decorators) : undefined;
-        node.modifiers = modifiers ? createNodeArray(modifiers) : undefined;
+    export function createExportDeclaration(decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, exportClause: NamedExports | undefined, moduleSpecifier?: Expression) {
+        const node = <ExportDeclaration>createSynthesizedNode(SyntaxKind.ExportDeclaration);
+        node.decorators = asNodeArray(decorators);
+        node.modifiers = asNodeArray(modifiers);
         node.exportClause = exportClause;
         node.moduleSpecifier = moduleSpecifier;
         return node;
     }
 
-    export function updateExportDeclaration(node: ExportDeclaration, decorators: Decorator[], modifiers: Modifier[], exportClause: NamedExports, moduleSpecifier: Expression) {
-        if (node.decorators !== decorators || node.modifiers !== modifiers || node.exportClause !== exportClause || node.moduleSpecifier !== moduleSpecifier) {
-            return updateNode(createExportDeclaration(decorators, modifiers, exportClause, moduleSpecifier, node), node);
-        }
-        return node;
+    export function updateExportDeclaration(node: ExportDeclaration, decorators: Decorator[] | undefined, modifiers: Modifier[] | undefined, exportClause: NamedExports | undefined, moduleSpecifier: Expression | undefined) {
+        return node.decorators !== decorators
+            || node.modifiers !== modifiers
+            || node.exportClause !== exportClause
+            || node.moduleSpecifier !== moduleSpecifier
+            ? updateNode(createExportDeclaration(decorators, modifiers, exportClause, moduleSpecifier), node)
+            : node;
     }
 
-    export function createNamedExports(elements: ExportSpecifier[], location?: TextRange) {
-        const node = <NamedExports>createNode(SyntaxKind.NamedExports, location);
+    export function createNamedExports(elements: ExportSpecifier[]) {
+        const node = <NamedExports>createSynthesizedNode(SyntaxKind.NamedExports);
         node.elements = createNodeArray(elements);
         return node;
     }
 
     export function updateNamedExports(node: NamedExports, elements: ExportSpecifier[]) {
-        if (node.elements !== elements) {
-            return updateNode(createNamedExports(elements, node), node);
-        }
-        return node;
+        return node.elements !== elements
+            ? updateNode(createNamedExports(elements), node)
+            : node;
     }
 
-    export function createExportSpecifier(name: string | Identifier, propertyName?: string | Identifier, location?: TextRange) {
-        const node = <ExportSpecifier>createNode(SyntaxKind.ExportSpecifier, location);
-        node.name = typeof name === "string" ? createIdentifier(name) : name;
-        node.propertyName = typeof propertyName === "string" ? createIdentifier(propertyName) : propertyName;
+    export function createExportSpecifier(propertyName: string | Identifier | undefined, name: string | Identifier) {
+        const node = <ExportSpecifier>createSynthesizedNode(SyntaxKind.ExportSpecifier);
+        node.propertyName = asName(propertyName);
+        node.name = asName(name);
         return node;
     }
 
-    export function updateExportSpecifier(node: ExportSpecifier, name: Identifier, propertyName: Identifier) {
-        if (node.name !== name || node.propertyName !== propertyName) {
-            return updateNode(createExportSpecifier(name, propertyName, node), node);
-        }
+    export function updateExportSpecifier(node: ExportSpecifier, propertyName: Identifier | undefined, name: Identifier) {
+        return node.propertyName !== propertyName
+            || node.name !== name
+            ? updateNode(createExportSpecifier(propertyName, name), node)
+            : node;
+    }
+
+    // Module references
+
+    export function createExternalModuleReference(expression: Expression) {
+        const node = <ExternalModuleReference>createSynthesizedNode(SyntaxKind.ExternalModuleReference);
+        node.expression = expression;
         return node;
     }
 
+    export function updateExternalModuleReference(node: ExternalModuleReference, expression: Expression) {
+        return node.expression !== expression
+            ? updateNode(createExternalModuleReference(expression), node)
+            : node;
+    }
+
     // JSX
 
-    export function createJsxElement(openingElement: JsxOpeningElement, children: JsxChild[], closingElement: JsxClosingElement, location?: TextRange) {
-        const node = <JsxElement>createNode(SyntaxKind.JsxElement, location);
+    export function createJsxElement(openingElement: JsxOpeningElement, children: JsxChild[], closingElement: JsxClosingElement) {
+        const node = <JsxElement>createSynthesizedNode(SyntaxKind.JsxElement);
         node.openingElement = openingElement;
         node.children = createNodeArray(children);
         node.closingElement = closingElement;
@@ -1243,186 +1769,224 @@ namespace ts {
     }
 
     export function updateJsxElement(node: JsxElement, openingElement: JsxOpeningElement, children: JsxChild[], closingElement: JsxClosingElement) {
-        if (node.openingElement !== openingElement || node.children !== children || node.closingElement !== closingElement) {
-            return updateNode(createJsxElement(openingElement, children, closingElement, node), node);
-        }
-        return node;
+        return node.openingElement !== openingElement
+            || node.children !== children
+            || node.closingElement !== closingElement
+            ? updateNode(createJsxElement(openingElement, children, closingElement), node)
+            : node;
     }
 
-    export function createJsxSelfClosingElement(tagName: JsxTagNameExpression, attributes: JsxAttributeLike[], location?: TextRange) {
-        const node = <JsxSelfClosingElement>createNode(SyntaxKind.JsxSelfClosingElement, location);
+    export function createJsxSelfClosingElement(tagName: JsxTagNameExpression, attributes: JsxAttributes) {
+        const node = <JsxSelfClosingElement>createSynthesizedNode(SyntaxKind.JsxSelfClosingElement);
         node.tagName = tagName;
-        node.attributes = createNodeArray(attributes);
+        node.attributes = attributes;
         return node;
     }
 
-    export function updateJsxSelfClosingElement(node: JsxSelfClosingElement, tagName: JsxTagNameExpression, attributes: JsxAttributeLike[]) {
-        if (node.tagName !== tagName || node.attributes !== attributes) {
-            return updateNode(createJsxSelfClosingElement(tagName, attributes, node), node);
-        }
-        return node;
+    export function updateJsxSelfClosingElement(node: JsxSelfClosingElement, tagName: JsxTagNameExpression, attributes: JsxAttributes) {
+        return node.tagName !== tagName
+            || node.attributes !== attributes
+            ? updateNode(createJsxSelfClosingElement(tagName, attributes), node)
+            : node;
     }
 
-    export function createJsxOpeningElement(tagName: JsxTagNameExpression, attributes: JsxAttributeLike[], location?: TextRange) {
-        const node = <JsxOpeningElement>createNode(SyntaxKind.JsxOpeningElement, location);
+    export function createJsxOpeningElement(tagName: JsxTagNameExpression, attributes: JsxAttributes) {
+        const node = <JsxOpeningElement>createSynthesizedNode(SyntaxKind.JsxOpeningElement);
         node.tagName = tagName;
-        node.attributes = createNodeArray(attributes);
+        node.attributes = attributes;
         return node;
     }
 
-    export function updateJsxOpeningElement(node: JsxOpeningElement, tagName: JsxTagNameExpression, attributes: JsxAttributeLike[]) {
-        if (node.tagName !== tagName || node.attributes !== attributes) {
-            return updateNode(createJsxOpeningElement(tagName, attributes, node), node);
-        }
-        return node;
+    export function updateJsxOpeningElement(node: JsxOpeningElement, tagName: JsxTagNameExpression, attributes: JsxAttributes) {
+        return node.tagName !== tagName
+            || node.attributes !== attributes
+            ? updateNode(createJsxOpeningElement(tagName, attributes), node)
+            : node;
     }
 
-    export function createJsxClosingElement(tagName: JsxTagNameExpression, location?: TextRange) {
-        const node = <JsxClosingElement>createNode(SyntaxKind.JsxClosingElement, location);
+    export function createJsxClosingElement(tagName: JsxTagNameExpression) {
+        const node = <JsxClosingElement>createSynthesizedNode(SyntaxKind.JsxClosingElement);
         node.tagName = tagName;
         return node;
     }
 
     export function updateJsxClosingElement(node: JsxClosingElement, tagName: JsxTagNameExpression) {
-        if (node.tagName !== tagName) {
-            return updateNode(createJsxClosingElement(tagName, node), node);
-        }
-        return node;
+        return node.tagName !== tagName
+            ? updateNode(createJsxClosingElement(tagName), node)
+            : node;
     }
 
-    export function createJsxAttribute(name: Identifier, initializer: StringLiteral | JsxExpression, location?: TextRange) {
-        const node = <JsxAttribute>createNode(SyntaxKind.JsxAttribute, location);
+    export function createJsxAttribute(name: Identifier, initializer: StringLiteral | JsxExpression) {
+        const node = <JsxAttribute>createSynthesizedNode(SyntaxKind.JsxAttribute);
         node.name = name;
         node.initializer = initializer;
         return node;
     }
 
     export function updateJsxAttribute(node: JsxAttribute, name: Identifier, initializer: StringLiteral | JsxExpression) {
-        if (node.name !== name || node.initializer !== initializer) {
-            return updateNode(createJsxAttribute(name, initializer, node), node);
-        }
-        return node;
+        return node.name !== name
+            || node.initializer !== initializer
+            ? updateNode(createJsxAttribute(name, initializer), node)
+            : node;
     }
 
-    export function createJsxSpreadAttribute(expression: Expression, location?: TextRange) {
-        const node = <JsxSpreadAttribute>createNode(SyntaxKind.JsxSpreadAttribute, location);
-        node.expression = expression;
+    export function createJsxAttributes(properties: JsxAttributeLike[]) {
+        const node = <JsxAttributes>createSynthesizedNode(SyntaxKind.JsxAttributes);
+        node.properties = createNodeArray(properties);
         return node;
     }
 
-    export function updateJsxSpreadAttribute(node: JsxSpreadAttribute, expression: Expression) {
-        if (node.expression !== expression) {
-            return updateNode(createJsxSpreadAttribute(expression, node), node);
-        }
-        return node;
+    export function updateJsxAttributes(node: JsxAttributes, properties: JsxAttributeLike[]) {
+        return node.properties !== properties
+            ? updateNode(createJsxAttributes(properties), node)
+            : node;
     }
 
-    export function createJsxExpression(expression: Expression, location?: TextRange) {
-        const node = <JsxExpression>createNode(SyntaxKind.JsxExpression, location);
+    export function createJsxSpreadAttribute(expression: Expression) {
+        const node = <JsxSpreadAttribute>createSynthesizedNode(SyntaxKind.JsxSpreadAttribute);
         node.expression = expression;
         return node;
     }
 
-    export function updateJsxExpression(node: JsxExpression, expression: Expression) {
-        if (node.expression !== expression) {
-            return updateNode(createJsxExpression(expression, node), node);
-        }
-        return node;
+    export function updateJsxSpreadAttribute(node: JsxSpreadAttribute, expression: Expression) {
+        return node.expression !== expression
+            ? updateNode(createJsxSpreadAttribute(expression), node)
+            : node;
     }
 
-    // Clauses
-
-    export function createHeritageClause(token: SyntaxKind, types: ExpressionWithTypeArguments[], location?: TextRange) {
-        const node = <HeritageClause>createNode(SyntaxKind.HeritageClause, location);
-        node.token = token;
-        node.types = createNodeArray(types);
+    export function createJsxExpression(dotDotDotToken: DotDotDotToken | undefined, expression: Expression | undefined) {
+        const node = <JsxExpression>createSynthesizedNode(SyntaxKind.JsxExpression);
+        node.dotDotDotToken = dotDotDotToken;
+        node.expression = expression;
         return node;
     }
 
-    export function updateHeritageClause(node: HeritageClause, types: ExpressionWithTypeArguments[]) {
-        if (node.types !== types) {
-            return updateNode(createHeritageClause(node.token, types, node), node);
-        }
-        return node;
+    export function updateJsxExpression(node: JsxExpression, expression: Expression | undefined) {
+        return node.expression !== expression
+            ? updateNode(createJsxExpression(node.dotDotDotToken, expression), node)
+            : node;
     }
 
-    export function createCaseClause(expression: Expression, statements: Statement[], location?: TextRange) {
-        const node = <CaseClause>createNode(SyntaxKind.CaseClause, location);
+    // Clauses
+
+    export function createCaseClause(expression: Expression, statements: Statement[]) {
+        const node = <CaseClause>createSynthesizedNode(SyntaxKind.CaseClause);
         node.expression = parenthesizeExpressionForList(expression);
         node.statements = createNodeArray(statements);
         return node;
     }
 
     export function updateCaseClause(node: CaseClause, expression: Expression, statements: Statement[]) {
-        if (node.expression !== expression || node.statements !== statements) {
-            return updateNode(createCaseClause(expression, statements, node), node);
-        }
-        return node;
+        return node.expression !== expression
+            || node.statements !== statements
+            ? updateNode(createCaseClause(expression, statements), node)
+            : node;
     }
 
-    export function createDefaultClause(statements: Statement[], location?: TextRange) {
-        const node = <DefaultClause>createNode(SyntaxKind.DefaultClause, location);
+    export function createDefaultClause(statements: Statement[]) {
+        const node = <DefaultClause>createSynthesizedNode(SyntaxKind.DefaultClause);
         node.statements = createNodeArray(statements);
         return node;
     }
 
     export function updateDefaultClause(node: DefaultClause, statements: Statement[]) {
-        if (node.statements !== statements) {
-            return updateNode(createDefaultClause(statements, node), node);
-        }
+        return node.statements !== statements
+            ? updateNode(createDefaultClause(statements), node)
+            : node;
+    }
+
+    export function createHeritageClause(token: HeritageClause["token"], types: ExpressionWithTypeArguments[]) {
+        const node = <HeritageClause>createSynthesizedNode(SyntaxKind.HeritageClause);
+        node.token = token;
+        node.types = createNodeArray(types);
         return node;
     }
 
-    export function createCatchClause(variableDeclaration: string | VariableDeclaration, block: Block, location?: TextRange) {
-        const node = <CatchClause>createNode(SyntaxKind.CatchClause, location);
+    export function updateHeritageClause(node: HeritageClause, types: ExpressionWithTypeArguments[]) {
+        return node.types !== types
+            ? updateNode(createHeritageClause(node.token, types), node)
+            : node;
+    }
+
+    export function createCatchClause(variableDeclaration: string | VariableDeclaration, block: Block) {
+        const node = <CatchClause>createSynthesizedNode(SyntaxKind.CatchClause);
         node.variableDeclaration = typeof variableDeclaration === "string" ? createVariableDeclaration(variableDeclaration) : variableDeclaration;
         node.block = block;
         return node;
     }
 
     export function updateCatchClause(node: CatchClause, variableDeclaration: VariableDeclaration, block: Block) {
-        if (node.variableDeclaration !== variableDeclaration || node.block !== block) {
-            return updateNode(createCatchClause(variableDeclaration, block, node), node);
-        }
-        return node;
+        return node.variableDeclaration !== variableDeclaration
+            || node.block !== block
+            ? updateNode(createCatchClause(variableDeclaration, block), node)
+            : node;
     }
 
     // Property assignments
 
-    export function createPropertyAssignment(name: string | PropertyName, initializer: Expression, location?: TextRange) {
-        const node = <PropertyAssignment>createNode(SyntaxKind.PropertyAssignment, location);
-        node.name = typeof name === "string" ? createIdentifier(name) : name;
+    export function createPropertyAssignment(name: string | PropertyName, initializer: Expression) {
+        const node = <PropertyAssignment>createSynthesizedNode(SyntaxKind.PropertyAssignment);
+        node.name = asName(name);
         node.questionToken = undefined;
         node.initializer = initializer !== undefined ? parenthesizeExpressionForList(initializer) : undefined;
         return node;
     }
 
     export function updatePropertyAssignment(node: PropertyAssignment, name: PropertyName, initializer: Expression) {
-        if (node.name !== name || node.initializer !== initializer) {
-            return updateNode(createPropertyAssignment(name, initializer, node), node);
-        }
-        return node;
+        return node.name !== name
+            || node.initializer !== initializer
+            ? updateNode(createPropertyAssignment(name, initializer), node)
+            : node;
     }
 
-    export function createShorthandPropertyAssignment(name: string | Identifier, objectAssignmentInitializer: Expression, location?: TextRange) {
-        const node = <ShorthandPropertyAssignment>createNode(SyntaxKind.ShorthandPropertyAssignment, location);
-        node.name = typeof name === "string" ? createIdentifier(name) : name;
+    export function createShorthandPropertyAssignment(name: string | Identifier, objectAssignmentInitializer?: Expression) {
+        const node = <ShorthandPropertyAssignment>createSynthesizedNode(SyntaxKind.ShorthandPropertyAssignment);
+        node.name = asName(name);
         node.objectAssignmentInitializer = objectAssignmentInitializer !== undefined ? parenthesizeExpressionForList(objectAssignmentInitializer) : undefined;
         return node;
     }
 
-    export function updateShorthandPropertyAssignment(node: ShorthandPropertyAssignment, name: Identifier, objectAssignmentInitializer: Expression) {
-        if (node.name !== name || node.objectAssignmentInitializer !== objectAssignmentInitializer) {
-            return updateNode(createShorthandPropertyAssignment(name, objectAssignmentInitializer, node), node);
-        }
+    export function updateShorthandPropertyAssignment(node: ShorthandPropertyAssignment, name: Identifier, objectAssignmentInitializer: Expression | undefined) {
+        return node.name !== name
+            || node.objectAssignmentInitializer !== objectAssignmentInitializer
+            ? updateNode(createShorthandPropertyAssignment(name, objectAssignmentInitializer), node)
+            : node;
+    }
+
+    export function createSpreadAssignment(expression: Expression) {
+        const node = <SpreadAssignment>createSynthesizedNode(SyntaxKind.SpreadAssignment);
+        node.expression = expression !== undefined ? parenthesizeExpressionForList(expression) : undefined;
+        return node;
+    }
+
+    export function updateSpreadAssignment(node: SpreadAssignment, expression: Expression) {
+        return node.expression !== expression
+            ? updateNode(createSpreadAssignment(expression), node)
+            : node;
+    }
+
+    // Enum
+
+    export function createEnumMember(name: string | PropertyName, initializer?: Expression) {
+        const node = <EnumMember>createSynthesizedNode(SyntaxKind.EnumMember);
+        node.name = asName(name);
+        node.initializer = initializer && parenthesizeExpressionForList(initializer);
         return node;
     }
 
+    export function updateEnumMember(node: EnumMember, name: PropertyName, initializer: Expression | undefined) {
+        return node.name !== name
+            || node.initializer !== initializer
+            ? updateNode(createEnumMember(name, initializer), node)
+            : node;
+    }
+
     // Top-level nodes
 
     export function updateSourceFileNode(node: SourceFile, statements: Statement[]) {
         if (node.statements !== statements) {
-            const updated = <SourceFile>createNode(SyntaxKind.SourceFile, /*location*/ node, node.flags);
+            const updated = <SourceFile>createSynthesizedNode(SyntaxKind.SourceFile);
+            updated.flags |= node.flags;
             updated.statements = createNodeArray(statements);
             updated.endOfFileToken = node.endOfFileToken;
             updated.fileName = node.fileName;
@@ -1452,13 +2016,23 @@ namespace ts {
             if (node.resolvedTypeReferenceDirectiveNames !== undefined) updated.resolvedTypeReferenceDirectiveNames = node.resolvedTypeReferenceDirectiveNames;
             if (node.imports !== undefined) updated.imports = node.imports;
             if (node.moduleAugmentations !== undefined) updated.moduleAugmentations = node.moduleAugmentations;
-            if (node.externalHelpersModuleName !== undefined) updated.externalHelpersModuleName = node.externalHelpersModuleName;
             return updateNode(updated, node);
         }
 
         return node;
     }
 
+    /**
+     * Creates a shallow, memberwise clone of a node for mutation.
+     */
+    export function getMutableClone<T extends Node>(node: T): T {
+        const clone = getSynthesizedClone(node);
+        clone.pos = node.pos;
+        clone.end = node.end;
+        clone.parent = node.parent;
+        return clone;
+    }
+
     // Transformation nodes
 
     /**
@@ -1468,7 +2042,32 @@ namespace ts {
      * @param original The original statement.
      */
     export function createNotEmittedStatement(original: Node) {
-        const node = <NotEmittedStatement>createNode(SyntaxKind.NotEmittedStatement, /*location*/ original);
+        const node = <NotEmittedStatement>createSynthesizedNode(SyntaxKind.NotEmittedStatement);
+        node.original = original;
+        setTextRange(node, original);
+        return node;
+    }
+
+    /**
+     * Creates a synthetic element to act as a placeholder for the end of an emitted declaration in
+     * order to properly emit exports.
+     */
+    /* @internal */
+    export function createEndOfDeclarationMarker(original: Node) {
+        const node = <EndOfDeclarationMarker>createSynthesizedNode(SyntaxKind.EndOfDeclarationMarker);
+        node.emitNode = {};
+        node.original = original;
+        return node;
+    }
+
+    /**
+     * Creates a synthetic element to act as a placeholder for the beginning of a merged declaration in
+     * order to properly emit exports.
+     */
+    /* @internal */
+    export function createMergeDeclarationMarker(original: Node) {
+        const node = <MergeDeclarationMarker>createSynthesizedNode(SyntaxKind.MergeDeclarationMarker);
+        node.emitNode = {};
         node.original = original;
         return node;
     }
@@ -1481,32 +2080,90 @@ namespace ts {
      * @param original The original outer expression.
      * @param location The location for the expression. Defaults to the positions from "original" if provided.
      */
-    export function createPartiallyEmittedExpression(expression: Expression, original?: Node, location?: TextRange) {
-        const node = <PartiallyEmittedExpression>createNode(SyntaxKind.PartiallyEmittedExpression, /*location*/ location || original);
+    export function createPartiallyEmittedExpression(expression: Expression, original?: Node) {
+        const node = <PartiallyEmittedExpression>createSynthesizedNode(SyntaxKind.PartiallyEmittedExpression);
         node.expression = expression;
         node.original = original;
+        setTextRange(node, original);
         return node;
     }
 
     export function updatePartiallyEmittedExpression(node: PartiallyEmittedExpression, expression: Expression) {
         if (node.expression !== expression) {
-            return updateNode(createPartiallyEmittedExpression(expression, node.original, node), node);
+            return updateNode(createPartiallyEmittedExpression(expression, node.original), node);
+        }
+        return node;
+    }
+
+    function flattenCommaElements(node: Expression): Expression | Expression[] {
+        if (nodeIsSynthesized(node) && !isParseTreeNode(node) && !node.original && !node.emitNode && !node.id) {
+            if (node.kind === SyntaxKind.CommaListExpression) {
+                return (<CommaListExpression>node).elements;
+            }
+            if (isBinaryExpression(node) && node.operatorToken.kind === SyntaxKind.CommaToken) {
+                return [node.left, node.right];
+            }
+        }
+        return node;
+    }
+
+    export function createCommaList(elements: Expression[]) {
+        const node = <CommaListExpression>createSynthesizedNode(SyntaxKind.CommaListExpression);
+        node.elements = createNodeArray(sameFlatMap(elements, flattenCommaElements));
+        return node;
+    }
+
+    export function updateCommaList(node: CommaListExpression, elements: Expression[]) {
+        return node.elements !== elements
+            ? updateNode(createCommaList(elements), node)
+            : node;
+    }
+
+    export function createBundle(sourceFiles: SourceFile[]) {
+        const node = <Bundle>createNode(SyntaxKind.Bundle);
+        node.sourceFiles = sourceFiles;
+        return node;
+    }
+
+    export function updateBundle(node: Bundle, sourceFiles: SourceFile[]) {
+        if (node.sourceFiles !== sourceFiles) {
+            return createBundle(sourceFiles);
         }
         return node;
     }
 
     // Compound nodes
 
+    export function createImmediatelyInvokedFunctionExpression(statements: Statement[]): CallExpression;
+    export function createImmediatelyInvokedFunctionExpression(statements: Statement[], param: ParameterDeclaration, paramValue: Expression): CallExpression;
+    export function createImmediatelyInvokedFunctionExpression(statements: Statement[], param?: ParameterDeclaration, paramValue?: Expression) {
+        return createCall(
+            createFunctionExpression(
+                /*modifiers*/ undefined,
+                /*asteriskToken*/ undefined,
+                /*name*/ undefined,
+                /*typeParameters*/ undefined,
+                /*parameters*/ param ? [param] : [],
+                /*type*/ undefined,
+                createBlock(statements, /*multiLine*/ true)
+            ),
+            /*typeArguments*/ undefined,
+            /*argumentsArray*/ paramValue ? [paramValue] : []
+        );
+    }
+
     export function createComma(left: Expression, right: Expression) {
         return <Expression>createBinary(left, SyntaxKind.CommaToken, right);
     }
 
-    export function createLessThan(left: Expression, right: Expression, location?: TextRange) {
-        return <Expression>createBinary(left, SyntaxKind.LessThanToken, right, location);
+    export function createLessThan(left: Expression, right: Expression) {
+        return <Expression>createBinary(left, SyntaxKind.LessThanToken, right);
     }
 
-    export function createAssignment(left: Expression, right: Expression, location?: TextRange) {
-        return createBinary(left, SyntaxKind.EqualsToken, right, location);
+    export function createAssignment(left: ObjectLiteralExpression | ArrayLiteralExpression, right: Expression): DestructuringAssignment;
+    export function createAssignment(left: Expression, right: Expression): BinaryExpression;
+    export function createAssignment(left: Expression, right: Expression) {
+        return createBinary(left, SyntaxKind.EqualsToken, right);
     }
 
     export function createStrictEquality(left: Expression, right: Expression) {
@@ -1525,8 +2182,8 @@ namespace ts {
         return createBinary(left, SyntaxKind.MinusToken, right);
     }
 
-    export function createPostfixIncrement(operand: Expression, location?: TextRange) {
-        return createPostfix(operand, SyntaxKind.PlusPlusToken, location);
+    export function createPostfixIncrement(operand: Expression) {
+        return createPostfix(operand, SyntaxKind.PlusPlusToken);
     }
 
     export function createLogicalAnd(left: Expression, right: Expression) {
@@ -1545,405 +2202,641 @@ namespace ts {
         return createVoid(createLiteral(0));
     }
 
-    export function createMemberAccessForPropertyName(target: Expression, memberName: PropertyName, location?: TextRange): MemberExpression {
-        if (isComputedPropertyName(memberName)) {
-             return createElementAccess(target, memberName.expression, location);
-        }
-        else {
-            const expression = isIdentifier(memberName) ? createPropertyAccess(target, memberName, location) : createElementAccess(target, memberName, location);
-            (expression.emitNode || (expression.emitNode = {})).flags |= EmitFlags.NoNestedSourceMaps;
-            return expression;
-        }
+    export function createExportDefault(expression: Expression) {
+        return createExportAssignment(/*decorators*/ undefined, /*modifiers*/ undefined, /*isExportEquals*/ false, expression);
     }
 
-    export function createRestParameter(name: string | Identifier) {
-        return createParameterDeclaration(
-            /*decorators*/ undefined,
-            /*modifiers*/ undefined,
-            createSynthesizedNode(SyntaxKind.DotDotDotToken),
-            name,
-            /*questionToken*/ undefined,
-            /*type*/ undefined,
-            /*initializer*/ undefined
-        );
+    export function createExternalModuleExport(exportName: Identifier) {
+        return createExportDeclaration(/*decorators*/ undefined, /*modifiers*/ undefined, createNamedExports([createExportSpecifier(/*propertyName*/ undefined, exportName)]));
     }
 
-    export function createFunctionCall(func: Expression, thisArg: Expression, argumentsList: Expression[], location?: TextRange) {
-        return createCall(
-            createPropertyAccess(func, "call"),
-            /*typeArguments*/ undefined,
-            [
-                thisArg,
-                ...argumentsList
-            ],
-            location
-        );
-    }
+    // Utilities
 
-    export function createFunctionApply(func: Expression, thisArg: Expression, argumentsExpression: Expression, location?: TextRange) {
-        return createCall(
-            createPropertyAccess(func, "apply"),
-            /*typeArguments*/ undefined,
-            [
-                thisArg,
-                argumentsExpression
-            ],
-            location
-        );
+    function asName(name: string | Identifier): Identifier;
+    function asName(name: string | BindingName): BindingName;
+    function asName(name: string | PropertyName): PropertyName;
+    function asName(name: string | EntityName): EntityName;
+    function asName(name: string | Identifier | ThisTypeNode): Identifier | ThisTypeNode;
+    function asName(name: string | Identifier | BindingName | PropertyName | QualifiedName | ThisTypeNode) {
+        return typeof name === "string" ? createIdentifier(name) : name;
     }
 
-    export function createArraySlice(array: Expression, start?: number | Expression) {
-        const argumentsList: Expression[] = [];
-        if (start !== undefined) {
-            argumentsList.push(typeof start === "number" ? createLiteral(start) : start);
-        }
-
-        return createCall(createPropertyAccess(array, "slice"), /*typeArguments*/ undefined, argumentsList);
+    function asExpression(value: string | number | Expression) {
+        return typeof value === "string" || typeof value === "number" ? createLiteral(value) : value;
     }
 
-    export function createArrayConcat(array: Expression, values: Expression[]) {
-        return createCall(
-            createPropertyAccess(array, "concat"),
-            /*typeArguments*/ undefined,
-            values
-        );
+    function asNodeArray<T extends Node>(array: T[] | undefined): NodeArray<T> | undefined {
+        return array ? createNodeArray(array) : undefined;
     }
 
-    export function createMathPow(left: Expression, right: Expression, location?: TextRange) {
-        return createCall(
-            createPropertyAccess(createIdentifier("Math"), "pow"),
-            /*typeArguments*/ undefined,
-            [left, right],
-            location
-        );
+    function asToken<TKind extends SyntaxKind>(value: TKind | Token<TKind>): Token<TKind> {
+        return typeof value === "number" ? createToken(value) : value;
     }
 
-    function createReactNamespace(reactNamespace: string, parent: JsxOpeningLikeElement) {
-        // To ensure the emit resolver can properly resolve the namespace, we need to
-        // treat this identifier as if it were a source tree node by clearing the `Synthesized`
-        // flag and setting a parent node.
-        const react = createIdentifier(reactNamespace || "React");
-        react.flags &= ~NodeFlags.Synthesized;
-        react.parent = parent;
-        return react;
+    /**
+     * Clears any EmitNode entries from parse-tree nodes.
+     * @param sourceFile A source file.
+     */
+    export function disposeEmitNodes(sourceFile: SourceFile) {
+        // During transformation we may need to annotate a parse tree node with transient
+        // transformation properties. As parse tree nodes live longer than transformation
+        // nodes, we need to make sure we reclaim any memory allocated for custom ranges
+        // from these nodes to ensure we do not hold onto entire subtrees just for position
+        // information. We also need to reset these nodes to a pre-transformation state
+        // for incremental parsing scenarios so that we do not impact later emit.
+        sourceFile = getSourceFileOfNode(getParseTreeNode(sourceFile));
+        const emitNode = sourceFile && sourceFile.emitNode;
+        const annotatedNodes = emitNode && emitNode.annotatedNodes;
+        if (annotatedNodes) {
+            for (const node of annotatedNodes) {
+                node.emitNode = undefined;
+            }
+        }
     }
 
-    export function createReactCreateElement(reactNamespace: string, tagName: Expression, props: Expression, children: Expression[], parentElement: JsxOpeningLikeElement, location: TextRange): LeftHandSideExpression {
-        const argumentsList = [tagName];
-        if (props) {
-            argumentsList.push(props);
-        }
+    /**
+     * Associates a node with the current transformation, initializing
+     * various transient transformation properties.
+     */
+    /* @internal */
+    export function getOrCreateEmitNode(node: Node) {
+        if (!node.emitNode) {
+            if (isParseTreeNode(node)) {
+                // To avoid holding onto transformation artifacts, we keep track of any
+                // parse tree node we are annotating. This allows us to clean them up after
+                // all transformations have completed.
+                if (node.kind === SyntaxKind.SourceFile) {
+                    return node.emitNode = { annotatedNodes: [node] };
+                }
 
-        if (children && children.length > 0) {
-            if (!props) {
-                argumentsList.push(createNull());
+                const sourceFile = getSourceFileOfNode(node);
+                getOrCreateEmitNode(sourceFile).annotatedNodes.push(node);
             }
 
-            if (children.length > 1) {
-                for (const child of children) {
-                    child.startsOnNewLine = true;
-                    argumentsList.push(child);
+            node.emitNode = {};
+        }
+
+        return node.emitNode;
+    }
+
+    export function setTextRange<T extends TextRange>(range: T, location: TextRange | undefined): T {
+        if (location) {
+            range.pos = location.pos;
+            range.end = location.end;
+        }
+        return range;
+    }
+
+    /**
+     * Sets flags that control emit behavior of a node.
+     */
+    export function setEmitFlags<T extends Node>(node: T, emitFlags: EmitFlags) {
+        getOrCreateEmitNode(node).flags = emitFlags;
+        return node;
+    }
+
+    /**
+     * Gets a custom text range to use when emitting source maps.
+     */
+    export function getSourceMapRange(node: Node) {
+        const emitNode = node.emitNode;
+        return (emitNode && emitNode.sourceMapRange) || node;
+    }
+
+    /**
+     * Sets a custom text range to use when emitting source maps.
+     */
+    export function setSourceMapRange<T extends Node>(node: T, range: SourceMapRange | undefined) {
+        getOrCreateEmitNode(node).sourceMapRange = range;
+        return node;
+    }
+
+    let SourceMapSource: new (fileName: string, text: string, skipTrivia?: (pos: number) => number) => SourceMapSource;
+
+    /**
+     * Create an external source map source file reference
+     */
+    export function createSourceMapSource(fileName: string, text: string, skipTrivia?: (pos: number) => number): SourceMapSource {
+        return new (SourceMapSource || (SourceMapSource = objectAllocator.getSourceMapSourceConstructor()))(fileName, text, skipTrivia);
+    }
+
+    /**
+     * Gets the TextRange to use for source maps for a token of a node.
+     */
+    export function getTokenSourceMapRange(node: Node, token: SyntaxKind): SourceMapRange | undefined {
+        const emitNode = node.emitNode;
+        const tokenSourceMapRanges = emitNode && emitNode.tokenSourceMapRanges;
+        return tokenSourceMapRanges && tokenSourceMapRanges[token];
+    }
+
+    /**
+     * Sets the TextRange to use for source maps for a token of a node.
+     */
+    export function setTokenSourceMapRange<T extends Node>(node: T, token: SyntaxKind, range: SourceMapRange | undefined) {
+        const emitNode = getOrCreateEmitNode(node);
+        const tokenSourceMapRanges = emitNode.tokenSourceMapRanges || (emitNode.tokenSourceMapRanges = []);
+        tokenSourceMapRanges[token] = range;
+        return node;
+    }
+
+    /**
+     * Gets a custom text range to use when emitting comments.
+     */
+    export function getCommentRange(node: Node) {
+        const emitNode = node.emitNode;
+        return (emitNode && emitNode.commentRange) || node;
+    }
+
+    /**
+     * Sets a custom text range to use when emitting comments.
+     */
+    export function setCommentRange<T extends Node>(node: T, range: TextRange) {
+        getOrCreateEmitNode(node).commentRange = range;
+        return node;
+    }
+
+    export function getSyntheticLeadingComments(node: Node): SynthesizedComment[] | undefined {
+        const emitNode = node.emitNode;
+        return emitNode && emitNode.leadingComments;
+    }
+
+    export function setSyntheticLeadingComments<T extends Node>(node: T, comments: SynthesizedComment[]) {
+        getOrCreateEmitNode(node).leadingComments = comments;
+        return node;
+    }
+
+    export function addSyntheticLeadingComment<T extends Node>(node: T, kind: SyntaxKind.SingleLineCommentTrivia | SyntaxKind.MultiLineCommentTrivia, text: string, hasTrailingNewLine?: boolean) {
+        return setSyntheticLeadingComments(node, append(getSyntheticLeadingComments(node), <SynthesizedComment>{ kind, pos: -1, end: -1, hasTrailingNewLine, text }));
+    }
+
+    export function getSyntheticTrailingComments(node: Node): SynthesizedComment[] | undefined {
+        const emitNode = node.emitNode;
+        return emitNode && emitNode.trailingComments;
+    }
+
+    export function setSyntheticTrailingComments<T extends Node>(node: T, comments: SynthesizedComment[]) {
+        getOrCreateEmitNode(node).trailingComments = comments;
+        return node;
+    }
+
+    export function addSyntheticTrailingComment<T extends Node>(node: T, kind: SyntaxKind.SingleLineCommentTrivia | SyntaxKind.MultiLineCommentTrivia, text: string, hasTrailingNewLine?: boolean) {
+        return setSyntheticTrailingComments(node, append(getSyntheticTrailingComments(node), <SynthesizedComment>{ kind, pos: -1, end: -1, hasTrailingNewLine, text }));
+    }
+
+    /**
+     * Gets the constant value to emit for an expression.
+     */
+    export function getConstantValue(node: PropertyAccessExpression | ElementAccessExpression) {
+        const emitNode = node.emitNode;
+        return emitNode && emitNode.constantValue;
+    }
+
+    /**
+     * Sets the constant value to emit for an expression.
+     */
+    export function setConstantValue(node: PropertyAccessExpression | ElementAccessExpression, value: string | number) {
+        const emitNode = getOrCreateEmitNode(node);
+        emitNode.constantValue = value;
+        return node;
+    }
+
+    /**
+     * Adds an EmitHelper to a node.
+     */
+    export function addEmitHelper<T extends Node>(node: T, helper: EmitHelper): T {
+        const emitNode = getOrCreateEmitNode(node);
+        emitNode.helpers = append(emitNode.helpers, helper);
+        return node;
+    }
+
+    /**
+     * Add EmitHelpers to a node.
+     */
+    export function addEmitHelpers<T extends Node>(node: T, helpers: EmitHelper[] | undefined): T {
+        if (some(helpers)) {
+            const emitNode = getOrCreateEmitNode(node);
+            for (const helper of helpers) {
+                if (!contains(emitNode.helpers, helper)) {
+                    emitNode.helpers = append(emitNode.helpers, helper);
                 }
             }
-            else {
-                argumentsList.push(children[0]);
+        }
+        return node;
+    }
+
+    /**
+     * Removes an EmitHelper from a node.
+     */
+    export function removeEmitHelper(node: Node, helper: EmitHelper): boolean {
+        const emitNode = node.emitNode;
+        if (emitNode) {
+            const helpers = emitNode.helpers;
+            if (helpers) {
+                return orderedRemoveItem(helpers, helper);
             }
         }
+        return false;
+    }
 
-        return createCall(
-            createPropertyAccess(
-                createReactNamespace(reactNamespace, parentElement),
-                "createElement"
-            ),
-            /*typeArguments*/ undefined,
-            argumentsList,
-            location
-        );
+    /**
+     * Gets the EmitHelpers of a node.
+     */
+    export function getEmitHelpers(node: Node): EmitHelper[] | undefined {
+        const emitNode = node.emitNode;
+        return emitNode && emitNode.helpers;
     }
 
-    export function createLetDeclarationList(declarations: VariableDeclaration[], location?: TextRange) {
-        return createVariableDeclarationList(declarations, location, NodeFlags.Let);
+    /**
+     * Moves matching emit helpers from a source node to a target node.
+     */
+    export function moveEmitHelpers(source: Node, target: Node, predicate: (helper: EmitHelper) => boolean) {
+        const sourceEmitNode = source.emitNode;
+        const sourceEmitHelpers = sourceEmitNode && sourceEmitNode.helpers;
+        if (!some(sourceEmitHelpers)) return;
+
+        const targetEmitNode = getOrCreateEmitNode(target);
+        let helpersRemoved = 0;
+        for (let i = 0; i < sourceEmitHelpers.length; i++) {
+            const helper = sourceEmitHelpers[i];
+            if (predicate(helper)) {
+                helpersRemoved++;
+                if (!contains(targetEmitNode.helpers, helper)) {
+                    targetEmitNode.helpers = append(targetEmitNode.helpers, helper);
+                }
+            }
+            else if (helpersRemoved > 0) {
+                sourceEmitHelpers[i - helpersRemoved] = helper;
+            }
+        }
+
+        if (helpersRemoved > 0) {
+            sourceEmitHelpers.length -= helpersRemoved;
+        }
     }
 
-    export function createConstDeclarationList(declarations: VariableDeclaration[], location?: TextRange) {
-        return createVariableDeclarationList(declarations, location, NodeFlags.Const);
+    /* @internal */
+    export function compareEmitHelpers(x: EmitHelper, y: EmitHelper) {
+        if (x === y) return Comparison.EqualTo;
+        if (x.priority === y.priority) return Comparison.EqualTo;
+        if (x.priority === undefined) return Comparison.GreaterThan;
+        if (y.priority === undefined) return Comparison.LessThan;
+        return compareValues(x.priority, y.priority);
     }
 
-    // Helpers
+    export function setOriginalNode<T extends Node>(node: T, original: Node | undefined): T {
+        node.original = original;
+        if (original) {
+            const emitNode = original.emitNode;
+            if (emitNode) node.emitNode = mergeEmitNode(emitNode, node.emitNode);
+        }
+        return node;
+    }
 
-    export function createHelperName(externalHelpersModuleName: Identifier | undefined, name: string) {
-        return externalHelpersModuleName
-            ? createPropertyAccess(externalHelpersModuleName, name)
-            : createIdentifier(name);
+    function mergeEmitNode(sourceEmitNode: EmitNode, destEmitNode: EmitNode) {
+        const {
+            flags,
+            leadingComments,
+            trailingComments,
+            commentRange,
+            sourceMapRange,
+            tokenSourceMapRanges,
+            constantValue,
+            helpers
+        } = sourceEmitNode;
+        if (!destEmitNode) destEmitNode = {};
+        // We are using `.slice()` here in case `destEmitNode.leadingComments` is pushed to later.
+        if (leadingComments) destEmitNode.leadingComments = addRange(leadingComments.slice(), destEmitNode.leadingComments);
+        if (trailingComments) destEmitNode.trailingComments = addRange(trailingComments.slice(), destEmitNode.trailingComments);
+        if (flags) destEmitNode.flags = flags;
+        if (commentRange) destEmitNode.commentRange = commentRange;
+        if (sourceMapRange) destEmitNode.sourceMapRange = sourceMapRange;
+        if (tokenSourceMapRanges) destEmitNode.tokenSourceMapRanges = mergeTokenSourceMapRanges(tokenSourceMapRanges, destEmitNode.tokenSourceMapRanges);
+        if (constantValue !== undefined) destEmitNode.constantValue = constantValue;
+        if (helpers) destEmitNode.helpers = addRange(destEmitNode.helpers, helpers);
+        return destEmitNode;
     }
 
-    export function createExtendsHelper(externalHelpersModuleName: Identifier | undefined, name: Identifier) {
-        return createCall(
-            createHelperName(externalHelpersModuleName, "__extends"),
-            /*typeArguments*/ undefined,
-            [
-                name,
-                createIdentifier("_super")
-            ]
-        );
+    function mergeTokenSourceMapRanges(sourceRanges: TextRange[], destRanges: TextRange[]) {
+        if (!destRanges) destRanges = [];
+        for (const key in sourceRanges) {
+            destRanges[key] = sourceRanges[key];
+        }
+        return destRanges;
     }
+}
 
-    export function createAssignHelper(externalHelpersModuleName: Identifier | undefined, attributesSegments: Expression[]) {
-        return createCall(
-            createHelperName(externalHelpersModuleName, "__assign"),
-            /*typeArguments*/ undefined,
-            attributesSegments
-        );
+/* @internal */
+namespace ts {
+    export const nullTransformationContext: TransformationContext = {
+        enableEmitNotification: noop,
+        enableSubstitution: noop,
+        endLexicalEnvironment: () => undefined,
+        getCompilerOptions: notImplemented,
+        getEmitHost: notImplemented,
+        getEmitResolver: notImplemented,
+        hoistFunctionDeclaration: noop,
+        hoistVariableDeclaration: noop,
+        isEmitNotificationEnabled: notImplemented,
+        isSubstitutionEnabled: notImplemented,
+        onEmitNode: noop,
+        onSubstituteNode: notImplemented,
+        readEmitHelpers: notImplemented,
+        requestEmitHelper: noop,
+        resumeLexicalEnvironment: noop,
+        startLexicalEnvironment: noop,
+        suspendLexicalEnvironment: noop
+    };
+
+    // Compound nodes
+
+    export type TypeOfTag = "undefined" | "number" | "boolean" | "string" | "symbol" | "object" | "function";
+
+    export function createTypeCheck(value: Expression, tag: TypeOfTag) {
+        return tag === "undefined"
+            ? createStrictEquality(value, createVoidZero())
+            : createStrictEquality(createTypeOf(value), createLiteral(tag));
     }
 
-    export function createParamHelper(externalHelpersModuleName: Identifier | undefined, expression: Expression, parameterOffset: number, location?: TextRange) {
-        return createCall(
-            createHelperName(externalHelpersModuleName, "__param"),
-            /*typeArguments*/ undefined,
-            [
-                createLiteral(parameterOffset),
-                expression
-            ],
+    export function createMemberAccessForPropertyName(target: Expression, memberName: PropertyName, location?: TextRange): MemberExpression {
+        if (isComputedPropertyName(memberName)) {
+             return setTextRange(createElementAccess(target, memberName.expression), location);
+        }
+        else {
+            const expression = setTextRange(
+                isIdentifier(memberName)
+                    ? createPropertyAccess(target, memberName)
+                    : createElementAccess(target, memberName),
+                memberName
+            );
+            getOrCreateEmitNode(expression).flags |= EmitFlags.NoNestedSourceMaps;
+            return expression;
+        }
+    }
+
+    export function createFunctionCall(func: Expression, thisArg: Expression, argumentsList: Expression[], location?: TextRange) {
+        return setTextRange(
+            createCall(
+                createPropertyAccess(func, "call"),
+                /*typeArguments*/ undefined,
+                [
+                    thisArg,
+                    ...argumentsList
+                ]),
             location
         );
     }
 
-    export function createMetadataHelper(externalHelpersModuleName: Identifier | undefined, metadataKey: string, metadataValue: Expression) {
-        return createCall(
-            createHelperName(externalHelpersModuleName, "__metadata"),
-            /*typeArguments*/ undefined,
-            [
-                createLiteral(metadataKey),
-                metadataValue
-            ]
+    export function createFunctionApply(func: Expression, thisArg: Expression, argumentsExpression: Expression, location?: TextRange) {
+        return setTextRange(
+            createCall(
+                createPropertyAccess(func, "apply"),
+                /*typeArguments*/ undefined,
+                [
+                    thisArg,
+                    argumentsExpression
+                ]
+            ),
+            location
         );
     }
 
-    export function createDecorateHelper(externalHelpersModuleName: Identifier | undefined, decoratorExpressions: Expression[], target: Expression, memberName?: Expression, descriptor?: Expression, location?: TextRange) {
-        const argumentsArray: Expression[] = [];
-        argumentsArray.push(createArrayLiteral(decoratorExpressions, /*location*/ undefined, /*multiLine*/ true));
-        argumentsArray.push(target);
-        if (memberName) {
-            argumentsArray.push(memberName);
-            if (descriptor) {
-                argumentsArray.push(descriptor);
-            }
+    export function createArraySlice(array: Expression, start?: number | Expression) {
+        const argumentsList: Expression[] = [];
+        if (start !== undefined) {
+            argumentsList.push(typeof start === "number" ? createLiteral(start) : start);
         }
 
-        return createCall(createHelperName(externalHelpersModuleName, "__decorate"), /*typeArguments*/ undefined, argumentsArray, location);
+        return createCall(createPropertyAccess(array, "slice"), /*typeArguments*/ undefined, argumentsList);
     }
 
-    export function createAwaiterHelper(externalHelpersModuleName: Identifier | undefined, hasLexicalArguments: boolean, promiseConstructor: EntityName | Expression, body: Block) {
-        const generatorFunc = createFunctionExpression(
-            createNode(SyntaxKind.AsteriskToken),
-            /*name*/ undefined,
-            /*typeParameters*/ undefined,
-            /*parameters*/ [],
-            /*type*/ undefined,
-            body
-        );
-
-        // Mark this node as originally an async function
-        (generatorFunc.emitNode || (generatorFunc.emitNode = {})).flags |= EmitFlags.AsyncFunctionBody;
-
+    export function createArrayConcat(array: Expression, values: Expression[]) {
         return createCall(
-            createHelperName(externalHelpersModuleName, "__awaiter"),
+            createPropertyAccess(array, "concat"),
             /*typeArguments*/ undefined,
-            [
-                createThis(),
-                hasLexicalArguments ? createIdentifier("arguments") : createVoidZero(),
-                promiseConstructor ? createExpressionFromEntityName(promiseConstructor) : createVoidZero(),
-                generatorFunc
-            ]
+            values
         );
     }
 
-    export function createHasOwnProperty(target: LeftHandSideExpression, propertyName: Expression) {
-        return createCall(
-            createPropertyAccess(target, "hasOwnProperty"),
-            /*typeArguments*/ undefined,
-            [propertyName]
+    export function createMathPow(left: Expression, right: Expression, location?: TextRange) {
+        return setTextRange(
+            createCall(
+                createPropertyAccess(createIdentifier("Math"), "pow"),
+                /*typeArguments*/ undefined,
+                [left, right]
+            ),
+            location
         );
     }
 
-    function createObjectCreate(prototype: Expression) {
-        return createCall(
-            createPropertyAccess(createIdentifier("Object"), "create"),
-            /*typeArguments*/ undefined,
-            [prototype]
-        );
+    function createReactNamespace(reactNamespace: string, parent: JsxOpeningLikeElement) {
+        // To ensure the emit resolver can properly resolve the namespace, we need to
+        // treat this identifier as if it were a source tree node by clearing the `Synthesized`
+        // flag and setting a parent node.
+        const react = createIdentifier(reactNamespace || "React");
+        react.flags &= ~NodeFlags.Synthesized;
+        // Set the parent that is in parse tree
+        // this makes sure that parent chain is intact for checker to traverse complete scope tree
+        react.parent = getParseTreeNode(parent);
+        return react;
     }
 
-    function createGeti(target: LeftHandSideExpression) {
-        // name => super[name]
-        return createArrowFunction(
-            /*modifiers*/ undefined,
-            /*typeParameters*/ undefined,
-            [createParameter("name")],
-            /*type*/ undefined,
-            /*equalsGreaterThanToken*/ undefined,
-            createElementAccess(
-                target,
-                createIdentifier("name")
-            )
-        );
+    function createJsxFactoryExpressionFromEntityName(jsxFactory: EntityName, parent: JsxOpeningLikeElement): Expression {
+        if (isQualifiedName(jsxFactory)) {
+            const left = createJsxFactoryExpressionFromEntityName(jsxFactory.left, parent);
+            const right = createIdentifier(jsxFactory.right.text);
+            right.text = jsxFactory.right.text;
+            return createPropertyAccess(left, right);
+        }
+        else {
+            return createReactNamespace(jsxFactory.text, parent);
+        }
     }
 
-    function createSeti(target: LeftHandSideExpression) {
-        // (name, value) => super[name] = value
-        return createArrowFunction(
-            /*modifiers*/ undefined,
-            /*typeParameters*/ undefined,
-            [
-                createParameter("name"),
-                createParameter("value")
-            ],
-            /*type*/ undefined,
-            /*equalsGreaterThanToken*/ undefined,
-            createAssignment(
-                createElementAccess(
-                    target,
-                    createIdentifier("name")
-                ),
-                createIdentifier("value")
-            )
-        );
+    function createJsxFactoryExpression(jsxFactoryEntity: EntityName, reactNamespace: string, parent: JsxOpeningLikeElement): Expression {
+        return jsxFactoryEntity ?
+            createJsxFactoryExpressionFromEntityName(jsxFactoryEntity, parent) :
+            createPropertyAccess(
+                createReactNamespace(reactNamespace, parent),
+                "createElement"
+            );
     }
 
-    export function createAdvancedAsyncSuperHelper() {
-        //  const _super = (function (geti, seti) {
-        //      const cache = Object.create(null);
-        //      return name => cache[name] || (cache[name] = { get value() { return geti(name); }, set value(v) { seti(name, v); } });
-        //  })(name => super[name], (name, value) => super[name] = value);
+    export function createExpressionForJsxElement(jsxFactoryEntity: EntityName, reactNamespace: string, tagName: Expression, props: Expression, children: Expression[], parentElement: JsxOpeningLikeElement, location: TextRange): LeftHandSideExpression {
+        const argumentsList = [tagName];
+        if (props) {
+            argumentsList.push(props);
+        }
 
-        // const cache = Object.create(null);
-        const createCache = createVariableStatement(
-            /*modifiers*/ undefined,
-            createConstDeclarationList([
-                createVariableDeclaration(
-                    "cache",
-                    /*type*/ undefined,
-                    createObjectCreate(createNull())
-                )
-            ])
-        );
+        if (children && children.length > 0) {
+            if (!props) {
+                argumentsList.push(createNull());
+            }
 
-        // get value() { return geti(name); }
-        const getter = createGetAccessor(
-            /*decorators*/ undefined,
-            /*modifiers*/ undefined,
-            "value",
-            /*parameters*/ [],
-            /*type*/ undefined,
-            createBlock([
-                createReturn(
-                    createCall(
-                        createIdentifier("geti"),
-                        /*typeArguments*/ undefined,
-                        [createIdentifier("name")]
-                    )
-                )
-            ])
+            if (children.length > 1) {
+                for (const child of children) {
+                    child.startsOnNewLine = true;
+                    argumentsList.push(child);
+                }
+            }
+            else {
+                argumentsList.push(children[0]);
+            }
+        }
+
+        return setTextRange(
+            createCall(
+                createJsxFactoryExpression(jsxFactoryEntity, reactNamespace, parentElement),
+                /*typeArguments*/ undefined,
+                argumentsList
+            ),
+            location
         );
+    }
 
-        // set value(v) { seti(name, v); }
-        const setter = createSetAccessor(
-            /*decorators*/ undefined,
-            /*modifiers*/ undefined,
-            "value",
-            [createParameter("v")],
-            createBlock([
-                createStatement(
-                    createCall(
-                        createIdentifier("seti"),
-                        /*typeArguments*/ undefined,
-                        [
-                            createIdentifier("name"),
-                            createIdentifier("v")
-                        ]
-                    )
-                )
-            ])
+    // Helpers
+
+    export function getHelperName(name: string) {
+        return setEmitFlags(createIdentifier(name), EmitFlags.HelperName | EmitFlags.AdviseOnEmitNode);
+    }
+
+    const valuesHelper: EmitHelper = {
+        name: "typescript:values",
+        scoped: false,
+        text: `
+            var __values = (this && this.__values) || function (o) {
+                var m = typeof Symbol === "function" && o[Symbol.iterator], i = 0;
+                if (m) return m.call(o);
+                return {
+                    next: function () {
+                        if (o && i >= o.length) o = void 0;
+                        return { value: o && o[i++], done: !o };
+                    }
+                };
+            };
+        `
+    };
+
+    export function createValuesHelper(context: TransformationContext, expression: Expression, location?: TextRange) {
+        context.requestEmitHelper(valuesHelper);
+        return setTextRange(
+            createCall(
+                getHelperName("__values"),
+                /*typeArguments*/ undefined,
+                [expression]
+            ),
+            location
         );
+    }
 
-        // return name => cache[name] || ...
-        const getOrCreateAccessorsForName = createReturn(
-            createArrowFunction(
-                /*modifiers*/ undefined,
-                /*typeParameters*/ undefined,
-                [createParameter("name")],
-                /*type*/ undefined,
-                /*equalsGreaterThanToken*/ undefined,
-                createLogicalOr(
-                    createElementAccess(
-                        createIdentifier("cache"),
-                        createIdentifier("name")
-                    ),
-                    createParen(
-                        createAssignment(
-                            createElementAccess(
-                                createIdentifier("cache"),
-                                createIdentifier("name")
-                            ),
-                            createObjectLiteral([
-                                getter,
-                                setter
-                            ])
-                        )
-                    )
-                )
-            )
+    const readHelper: EmitHelper = {
+        name: "typescript:read",
+        scoped: false,
+        text: `
+            var __read = (this && this.__read) || function (o, n) {
+                var m = typeof Symbol === "function" && o[Symbol.iterator];
+                if (!m) return o;
+                var i = m.call(o), r, ar = [], e;
+                try {
+                    while ((n === void 0 || n-- > 0) && !(r = i.next()).done) ar.push(r.value);
+                }
+                catch (error) { e = { error: error }; }
+                finally {
+                    try {
+                        if (r && !r.done && (m = i["return"])) m.call(i);
+                    }
+                    finally { if (e) throw e.error; }
+                }
+                return ar;
+            };
+        `
+    };
+
+    export function createReadHelper(context: TransformationContext, iteratorRecord: Expression, count: number | undefined, location?: TextRange) {
+        context.requestEmitHelper(readHelper);
+        return setTextRange(
+            createCall(
+                getHelperName("__read"),
+                /*typeArguments*/ undefined,
+                count !== undefined
+                    ? [iteratorRecord, createLiteral(count)]
+                    : [iteratorRecord]
+            ),
+            location
         );
+    }
 
-        //  const _super = (function (geti, seti) {
-        //      const cache = Object.create(null);
-        //      return name => cache[name] || (cache[name] = { get value() { return geti(name); }, set value(v) { seti(name, v); } });
-        //  })(name => super[name], (name, value) => super[name] = value);
-        return createVariableStatement(
-            /*modifiers*/ undefined,
-            createConstDeclarationList([
-                createVariableDeclaration(
-                    "_super",
-                    /*type*/ undefined,
-                    createCall(
-                        createParen(
-                            createFunctionExpression(
-                                /*asteriskToken*/ undefined,
-                                /*name*/ undefined,
-                                /*typeParameters*/ undefined,
-                                [
-                                    createParameter("geti"),
-                                    createParameter("seti")
-                                ],
-                                /*type*/ undefined,
-                                createBlock([
-                                    createCache,
-                                    getOrCreateAccessorsForName
-                                ])
-                            )
-                        ),
-                        /*typeArguments*/ undefined,
-                        [
-                            createGeti(createSuper()),
-                            createSeti(createSuper())
-                        ]
-                    )
-                )
-            ])
+    const spreadHelper: EmitHelper = {
+        name: "typescript:spread",
+        scoped: false,
+        text: `
+            var __spread = (this && this.__spread) || function () {
+                for (var ar = [], i = 0; i < arguments.length; i++) ar = ar.concat(__read(arguments[i]));
+                return ar;
+            };`
+    };
+
+    export function createSpreadHelper(context: TransformationContext, argumentList: Expression[], location?: TextRange) {
+        context.requestEmitHelper(readHelper);
+        context.requestEmitHelper(spreadHelper);
+        return setTextRange(
+            createCall(
+                getHelperName("__spread"),
+                /*typeArguments*/ undefined,
+                argumentList
+            ),
+            location
         );
     }
 
-    export function createSimpleAsyncSuperHelper() {
-        return createVariableStatement(
-            /*modifiers*/ undefined,
-            createConstDeclarationList([
-                createVariableDeclaration(
-                    "_super",
-                    /*type*/ undefined,
-                    createGeti(createSuper())
-                )
-            ])
+    // Utilities
+
+    export function createForOfBindingStatement(node: ForInitializer, boundValue: Expression): Statement {
+        if (isVariableDeclarationList(node)) {
+            const firstDeclaration = firstOrUndefined(node.declarations);
+            const updatedDeclaration = updateVariableDeclaration(
+                firstDeclaration,
+                firstDeclaration.name,
+                /*typeNode*/ undefined,
+                boundValue
+            );
+            return setTextRange(
+                createVariableStatement(
+                    /*modifiers*/ undefined,
+                    updateVariableDeclarationList(node, [updatedDeclaration])
+                ),
+                /*location*/ node
+            );
+        }
+        else {
+            const updatedExpression = setTextRange(createAssignment(node, boundValue), /*location*/ node);
+            return setTextRange(createStatement(updatedExpression), /*location*/ node);
+        }
+    }
+
+    export function insertLeadingStatement(dest: Statement, source: Statement) {
+        if (isBlock(dest)) {
+            return updateBlock(dest, setTextRange(createNodeArray([source, ...dest.statements]), dest.statements));
+        }
+        else {
+            return createBlock(createNodeArray([dest, source]), /*multiLine*/ true);
+        }
+    }
+
+    export function restoreEnclosingLabel(node: Statement, outermostLabeledStatement: LabeledStatement, afterRestoreLabelCallback?: (node: LabeledStatement) => void): Statement {
+        if (!outermostLabeledStatement) {
+            return node;
+        }
+        const updated = updateLabel(
+            outermostLabeledStatement,
+            outermostLabeledStatement.label,
+            outermostLabeledStatement.statement.kind === SyntaxKind.LabeledStatement
+                ? restoreEnclosingLabel(node, <LabeledStatement>outermostLabeledStatement.statement)
+                : node
         );
+        if (afterRestoreLabelCallback) {
+            afterRestoreLabelCallback(outermostLabeledStatement);
+        }
+        return updated;
     }
 
     export interface CallBinding {
@@ -1983,7 +2876,13 @@ namespace ts {
         }
         else if (callee.kind === SyntaxKind.SuperKeyword) {
             thisArg = createThis();
-            target = languageVersion < ScriptTarget.ES6 ? createIdentifier("_super", /*location*/ callee) : <PrimaryExpression>callee;
+            target = languageVersion < ScriptTarget.ES2015
+                ? setTextRange(createIdentifier("_super"), callee)
+                : <PrimaryExpression>callee;
+        }
+        else if (getEmitFlags(callee) & EmitFlags.HelperName) {
+            thisArg = createVoidZero();
+            target = parenthesizeForAccess(callee);
         }
         else {
             switch (callee.kind) {
@@ -1992,14 +2891,16 @@ namespace ts {
                         // for `a.b()` target is `(_a = a).b` and thisArg is `_a`
                         thisArg = createTempVariable(recordTempVariable);
                         target = createPropertyAccess(
-                            createAssignment(
-                                thisArg,
-                                (<PropertyAccessExpression>callee).expression,
-                                /*location*/ (<PropertyAccessExpression>callee).expression
+                            setTextRange(
+                                createAssignment(
+                                    thisArg,
+                                    (<PropertyAccessExpression>callee).expression
+                                ),
+                                (<PropertyAccessExpression>callee).expression
                             ),
-                            (<PropertyAccessExpression>callee).name,
-                            /*location*/ callee
+                            (<PropertyAccessExpression>callee).name
                         );
+                        setTextRange(target, callee);
                     }
                     else {
                         thisArg = (<PropertyAccessExpression>callee).expression;
@@ -2013,14 +2914,16 @@ namespace ts {
                         // for `a[b]()` target is `(_a = a)[b]` and thisArg is `_a`
                         thisArg = createTempVariable(recordTempVariable);
                         target = createElementAccess(
-                            createAssignment(
-                                thisArg,
-                                (<ElementAccessExpression>callee).expression,
-                                /*location*/ (<ElementAccessExpression>callee).expression
+                            setTextRange(
+                                createAssignment(
+                                    thisArg,
+                                    (<ElementAccessExpression>callee).expression
+                                ),
+                                (<ElementAccessExpression>callee).expression
                             ),
-                            (<ElementAccessExpression>callee).argumentExpression,
-                            /*location*/ callee
+                            (<ElementAccessExpression>callee).argumentExpression
                         );
+                        setTextRange(target, callee);
                     }
                     else {
                         thisArg = (<ElementAccessExpression>callee).expression;
@@ -2043,14 +2946,18 @@ namespace ts {
     }
 
     export function inlineExpressions(expressions: Expression[]) {
-        return reduceLeft(expressions, createComma);
+        // Avoid deeply nested comma expressions as traversing them during emit can result in "Maximum call
+        // stack size exceeded" errors.
+        return expressions.length > 10
+            ? createCommaList(expressions)
+            : reduceLeft(expressions, createComma);
     }
 
     export function createExpressionFromEntityName(node: EntityName | Expression): Expression {
         if (isQualifiedName(node)) {
             const left = createExpressionFromEntityName(node.left);
             const right = getMutableClone(node.right);
-            return createPropertyAccess(left, right, /*location*/ node);
+            return setTextRange(createPropertyAccess(left, right), node);
         }
         else {
             return getMutableClone(node);
@@ -2059,7 +2966,7 @@ namespace ts {
 
     export function createExpressionForPropertyName(memberName: PropertyName): Expression {
         if (isIdentifier(memberName)) {
-            return createLiteral(memberName, /*location*/ undefined);
+            return createLiteral(memberName);
         }
         else if (isComputedPropertyName(memberName)) {
             return getMutableClone(memberName.expression);
@@ -2089,14 +2996,15 @@ namespace ts {
             const properties: ObjectLiteralElementLike[] = [];
             if (getAccessor) {
                 const getterFunction = createFunctionExpression(
+                    getAccessor.modifiers,
                     /*asteriskToken*/ undefined,
                     /*name*/ undefined,
                     /*typeParameters*/ undefined,
                     getAccessor.parameters,
                     /*type*/ undefined,
-                    getAccessor.body,
-                    /*location*/ getAccessor
+                    getAccessor.body
                 );
+                setTextRange(getterFunction, getAccessor);
                 setOriginalNode(getterFunction, getAccessor);
                 const getter = createPropertyAssignment("get", getterFunction);
                 properties.push(getter);
@@ -2104,30 +3012,33 @@ namespace ts {
 
             if (setAccessor) {
                 const setterFunction = createFunctionExpression(
+                    setAccessor.modifiers,
                     /*asteriskToken*/ undefined,
                     /*name*/ undefined,
                     /*typeParameters*/ undefined,
                     setAccessor.parameters,
                     /*type*/ undefined,
-                    setAccessor.body,
-                    /*location*/ setAccessor
+                    setAccessor.body
                 );
+                setTextRange(setterFunction, setAccessor);
                 setOriginalNode(setterFunction, setAccessor);
                 const setter = createPropertyAssignment("set", setterFunction);
                 properties.push(setter);
             }
 
-            properties.push(createPropertyAssignment("enumerable", createLiteral(true)));
-            properties.push(createPropertyAssignment("configurable", createLiteral(true)));
-
-            const expression = createCall(
-                createPropertyAccess(createIdentifier("Object"), "defineProperty"),
-                /*typeArguments*/ undefined,
-                [
-                    receiver,
-                    createExpressionForPropertyName(property.name),
-                    createObjectLiteral(properties, /*location*/ undefined, multiLine)
-                ],
+            properties.push(createPropertyAssignment("enumerable", createTrue()));
+            properties.push(createPropertyAssignment("configurable", createTrue()));
+
+            const expression = setTextRange(
+                createCall(
+                    createPropertyAccess(createIdentifier("Object"), "defineProperty"),
+                    /*typeArguments*/ undefined,
+                    [
+                        receiver,
+                        createExpressionForPropertyName(property.name),
+                        createObjectLiteral(properties, multiLine)
+                    ]
+                ),
                 /*location*/ firstAccessor
             );
 
@@ -2140,12 +3051,14 @@ namespace ts {
     function createExpressionForPropertyAssignment(property: PropertyAssignment, receiver: Expression) {
         return aggregateTransformFlags(
             setOriginalNode(
-                createAssignment(
-                    createMemberAccessForPropertyName(receiver, property.name, /*location*/ property.name),
-                    property.initializer,
-                    /*location*/ property
+                setTextRange(
+                    createAssignment(
+                        createMemberAccessForPropertyName(receiver, property.name, /*location*/ property.name),
+                        property.initializer
+                    ),
+                    property
                 ),
-                /*original*/ property
+                property
             )
         );
     }
@@ -2153,9 +3066,11 @@ namespace ts {
     function createExpressionForShorthandPropertyAssignment(property: ShorthandPropertyAssignment, receiver: Expression) {
         return aggregateTransformFlags(
             setOriginalNode(
-                createAssignment(
-                    createMemberAccessForPropertyName(receiver, property.name, /*location*/ property.name),
-                    getSynthesizedClone(property.name),
+                setTextRange(
+                    createAssignment(
+                        createMemberAccessForPropertyName(receiver, property.name, /*location*/ property.name),
+                        getSynthesizedClone(property.name)
+                    ),
                     /*location*/ property
                 ),
                 /*original*/ property
@@ -2166,19 +3081,24 @@ namespace ts {
     function createExpressionForMethodDeclaration(method: MethodDeclaration, receiver: Expression) {
         return aggregateTransformFlags(
             setOriginalNode(
-                createAssignment(
-                    createMemberAccessForPropertyName(receiver, method.name, /*location*/ method.name),
-                    setOriginalNode(
-                        createFunctionExpression(
-                            method.asteriskToken,
-                            /*name*/ undefined,
-                            /*typeParameters*/ undefined,
-                            method.parameters,
-                            /*type*/ undefined,
-                            method.body,
-                            /*location*/ method
-                        ),
-                        /*original*/ method
+                setTextRange(
+                    createAssignment(
+                        createMemberAccessForPropertyName(receiver, method.name, /*location*/ method.name),
+                        setOriginalNode(
+                            setTextRange(
+                                createFunctionExpression(
+                                    method.modifiers,
+                                    method.asteriskToken,
+                                    /*name*/ undefined,
+                                    /*typeParameters*/ undefined,
+                                    method.parameters,
+                                    /*type*/ undefined,
+                                    method.body
+                                ),
+                                /*location*/ method
+                            ),
+                            /*original*/ method
+                        )
                     ),
                     /*location*/ method
                 ),
@@ -2187,7 +3107,154 @@ namespace ts {
         );
     }
 
-    // Utilities
+    /**
+     * Gets the internal name of a declaration. This is primarily used for declarations that can be
+     * referred to by name in the body of an ES5 class function body. An internal name will *never*
+     * be prefixed with an module or namespace export modifier like "exports." when emitted as an
+     * expression. An internal name will also *never* be renamed due to a collision with a block
+     * scoped variable.
+     *
+     * @param node The declaration.
+     * @param allowComments A value indicating whether comments may be emitted for the name.
+     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
+     */
+    export function getInternalName(node: Declaration, allowComments?: boolean, allowSourceMaps?: boolean) {
+        return getName(node, allowComments, allowSourceMaps, EmitFlags.LocalName | EmitFlags.InternalName);
+    }
+
+    /**
+     * Gets whether an identifier should only be referred to by its internal name.
+     */
+    export function isInternalName(node: Identifier) {
+        return (getEmitFlags(node) & EmitFlags.InternalName) !== 0;
+    }
+
+    /**
+     * Gets the local name of a declaration. This is primarily used for declarations that can be
+     * referred to by name in the declaration's immediate scope (classes, enums, namespaces). A
+     * local name will *never* be prefixed with an module or namespace export modifier like
+     * "exports." when emitted as an expression.
+     *
+     * @param node The declaration.
+     * @param allowComments A value indicating whether comments may be emitted for the name.
+     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
+     */
+    export function getLocalName(node: Declaration, allowComments?: boolean, allowSourceMaps?: boolean) {
+        return getName(node, allowComments, allowSourceMaps, EmitFlags.LocalName);
+    }
+
+    /**
+     * Gets whether an identifier should only be referred to by its local name.
+     */
+    export function isLocalName(node: Identifier) {
+        return (getEmitFlags(node) & EmitFlags.LocalName) !== 0;
+    }
+
+    /**
+     * Gets the export name of a declaration. This is primarily used for declarations that can be
+     * referred to by name in the declaration's immediate scope (classes, enums, namespaces). An
+     * export name will *always* be prefixed with an module or namespace export modifier like
+     * `"exports."` when emitted as an expression if the name points to an exported symbol.
+     *
+     * @param node The declaration.
+     * @param allowComments A value indicating whether comments may be emitted for the name.
+     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
+     */
+    export function getExportName(node: Declaration, allowComments?: boolean, allowSourceMaps?: boolean): Identifier {
+        return getName(node, allowComments, allowSourceMaps, EmitFlags.ExportName);
+    }
+
+    /**
+     * Gets whether an identifier should only be referred to by its export representation if the
+     * name points to an exported symbol.
+     */
+    export function isExportName(node: Identifier) {
+        return (getEmitFlags(node) & EmitFlags.ExportName) !== 0;
+    }
+
+    /**
+     * Gets the name of a declaration for use in declarations.
+     *
+     * @param node The declaration.
+     * @param allowComments A value indicating whether comments may be emitted for the name.
+     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
+     */
+    export function getDeclarationName(node: Declaration, allowComments?: boolean, allowSourceMaps?: boolean) {
+        return getName(node, allowComments, allowSourceMaps);
+    }
+
+    function getName(node: Declaration, allowComments?: boolean, allowSourceMaps?: boolean, emitFlags?: EmitFlags) {
+        const nodeName = getNameOfDeclaration(node);
+        if (nodeName && isIdentifier(nodeName) && !isGeneratedIdentifier(nodeName)) {
+            const name = getMutableClone(nodeName);
+            emitFlags |= getEmitFlags(nodeName);
+            if (!allowSourceMaps) emitFlags |= EmitFlags.NoSourceMap;
+            if (!allowComments) emitFlags |= EmitFlags.NoComments;
+            if (emitFlags) setEmitFlags(name, emitFlags);
+            return name;
+        }
+        return getGeneratedNameForNode(node);
+    }
+
+    /**
+     * Gets the exported name of a declaration for use in expressions.
+     *
+     * An exported name will *always* be prefixed with an module or namespace export modifier like
+     * "exports." if the name points to an exported symbol.
+     *
+     * @param ns The namespace identifier.
+     * @param node The declaration.
+     * @param allowComments A value indicating whether comments may be emitted for the name.
+     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
+     */
+    export function getExternalModuleOrNamespaceExportName(ns: Identifier | undefined, node: Declaration, allowComments?: boolean, allowSourceMaps?: boolean): Identifier | PropertyAccessExpression {
+        if (ns && hasModifier(node, ModifierFlags.Export)) {
+            return getNamespaceMemberName(ns, getName(node), allowComments, allowSourceMaps);
+        }
+        return getExportName(node, allowComments, allowSourceMaps);
+    }
+
+    /**
+     * Gets a namespace-qualified name for use in expressions.
+     *
+     * @param ns The namespace identifier.
+     * @param name The name.
+     * @param allowComments A value indicating whether comments may be emitted for the name.
+     * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
+     */
+    export function getNamespaceMemberName(ns: Identifier, name: Identifier, allowComments?: boolean, allowSourceMaps?: boolean): PropertyAccessExpression {
+        const qualifiedName = createPropertyAccess(ns, nodeIsSynthesized(name) ? name : getSynthesizedClone(name));
+        setTextRange(qualifiedName, name);
+        let emitFlags: EmitFlags;
+        if (!allowSourceMaps) emitFlags |= EmitFlags.NoSourceMap;
+        if (!allowComments) emitFlags |= EmitFlags.NoComments;
+        if (emitFlags) setEmitFlags(qualifiedName, emitFlags);
+        return qualifiedName;
+    }
+
+    export function convertToFunctionBody(node: ConciseBody, multiLine?: boolean) {
+        return isBlock(node) ? node : setTextRange(createBlock([setTextRange(createReturn(node), node)], multiLine), node);
+    }
+
+    export function convertFunctionDeclarationToExpression(node: FunctionDeclaration) {
+        Debug.assert(!!node.body);
+        const updated = createFunctionExpression(
+            node.modifiers,
+            node.asteriskToken,
+            node.name,
+            node.typeParameters,
+            node.parameters,
+            node.type,
+            node.body
+        );
+        setOriginalNode(updated, node);
+        setTextRange(updated, node);
+        if (node.startsOnNewLine) {
+            updated.startsOnNewLine = true;
+        }
+        aggregateTransformFlags(updated);
+        return updated;
+    }
 
     function isUseStrictPrologue(node: ExpressionStatement): boolean {
         return (node.expression as StringLiteral).text === "use strict";
@@ -2204,34 +3271,99 @@ namespace ts {
      * @param ensureUseStrict: boolean determining whether the function need to add prologue-directives
      * @param visitor: Optional callback used to visit any custom prologue directives.
      */
-    export function addPrologueDirectives(target: Statement[], source: Statement[], ensureUseStrict?: boolean, visitor?: (node: Node) => VisitResult<Node>): number {
-        Debug.assert(target.length === 0, "PrologueDirectives should be at the first statement in the target statements array");
+    export function addPrologue(target: Statement[], source: Statement[], ensureUseStrict?: boolean, visitor?: (node: Node) => VisitResult<Node>): number {
+        const offset = addStandardPrologue(target, source, ensureUseStrict);
+        return addCustomPrologue(target, source, offset, visitor);
+    }
+
+    /**
+     * Add just the standard (string-expression) prologue-directives into target statement-array.
+     * The function needs to be called during each transformation step.
+     * This function needs to be called whenever we transform the statement
+     * list of a source file, namespace, or function-like body.
+     */
+    export function addStandardPrologue(target: Statement[], source: Statement[], ensureUseStrict?: boolean): number {
+        Debug.assert(target.length === 0, "Prologue directives should be at the first statement in the target statements array");
         let foundUseStrict = false;
         let statementOffset = 0;
         const numStatements = source.length;
         while (statementOffset < numStatements) {
             const statement = source[statementOffset];
             if (isPrologueDirective(statement)) {
-                if (isUseStrictPrologue(statement as ExpressionStatement)) {
+                if (isUseStrictPrologue(statement)) {
                     foundUseStrict = true;
                 }
                 target.push(statement);
             }
             else {
-                if (ensureUseStrict && !foundUseStrict) {
-                    target.push(startOnNewLine(createStatement(createLiteral("use strict"))));
+                break;
+            }
+            statementOffset++;
+        }
+        if (ensureUseStrict && !foundUseStrict) {
+            target.push(startOnNewLine(createStatement(createLiteral("use strict"))));
+        }
+        return statementOffset;
+    }
+
+    /**
+     * Add just the custom prologue-directives into target statement-array.
+     * The function needs to be called during each transformation step.
+     * This function needs to be called whenever we transform the statement
+     * list of a source file, namespace, or function-like body.
+     */
+    export function addCustomPrologue(target: Statement[], source: Statement[], statementOffset: number, visitor?: (node: Node) => VisitResult<Node>): number {
+        const numStatements = source.length;
+        while (statementOffset < numStatements) {
+            const statement = source[statementOffset];
+            if (getEmitFlags(statement) & EmitFlags.CustomPrologue) {
+                target.push(visitor ? visitNode(statement, visitor, isStatement) : statement);
+            }
+            else {
+                break;
+            }
+            statementOffset++;
+        }
+        return statementOffset;
+    }
+
+    export function startsWithUseStrict(statements: Statement[]) {
+        const firstStatement = firstOrUndefined(statements);
+        return firstStatement !== undefined
+            && isPrologueDirective(firstStatement)
+            && isUseStrictPrologue(firstStatement);
+    }
+
+    /**
+     * Ensures "use strict" directive is added
+     *
+     * @param statements An array of statements
+     */
+    export function ensureUseStrict(statements: NodeArray<Statement>): NodeArray<Statement> {
+        let foundUseStrict = false;
+        for (const statement of statements) {
+            if (isPrologueDirective(statement)) {
+                if (isUseStrictPrologue(statement as ExpressionStatement)) {
                     foundUseStrict = true;
-                }
-                if (getEmitFlags(statement) & EmitFlags.CustomPrologue) {
-                    target.push(visitor ? visitNode(statement, visitor, isStatement) : statement);
-                }
-                else {
                     break;
                 }
             }
-            statementOffset++;
+            else {
+                break;
+            }
         }
-        return statementOffset;
+
+        if (!foundUseStrict) {
+            return setTextRange(
+                createNodeArray<Statement>([
+                    startOnNewLine(createStatement(createLiteral("use strict"))),
+                    ...statements
+                ]),
+                statements
+            );
+        }
+
+        return statements;
     }
 
     /**
@@ -2411,6 +3543,25 @@ namespace ts {
         return SyntaxKind.Unknown;
     }
 
+    export function parenthesizeForConditionalHead(condition: Expression) {
+        const conditionalPrecedence = getOperatorPrecedence(SyntaxKind.ConditionalExpression, SyntaxKind.QuestionToken);
+        const emittedCondition = skipPartiallyEmittedExpressions(condition);
+        const conditionPrecedence = getExpressionPrecedence(emittedCondition);
+        if (compareValues(conditionPrecedence, conditionalPrecedence) === Comparison.LessThan) {
+            return createParen(condition);
+        }
+        return condition;
+    }
+
+    export function parenthesizeSubexpressionOfConditionalExpression(e: Expression): Expression {
+        // per ES grammar both 'whenTrue' and 'whenFalse' parts of conditional expression are assignment expressions
+        // so in case when comma expression is introduced as a part of previous transformations
+        // if should be wrapped in parens since comma operator has the lowest precedence
+        return e.kind === SyntaxKind.BinaryExpression && (<BinaryExpression>e).operatorToken.kind === SyntaxKind.CommaToken
+            ? createParen(e)
+            : e;
+    }
+
     /**
      * Wraps an expression in parentheses if it is needed in order to use the expression
      * as the expression of a NewExpression node.
@@ -2440,36 +3591,33 @@ namespace ts {
      */
     export function parenthesizeForAccess(expression: Expression): LeftHandSideExpression {
         // isLeftHandSideExpression is almost the correct criterion for when it is not necessary
-        // to parenthesize the expression before a dot. The known exceptions are:
+        // to parenthesize the expression before a dot. The known exception is:
         //
         //    NewExpression:
         //       new C.x        -> not the same as (new C).x
-        //    NumericLiteral
-        //       1.x            -> not the same as (1).x
         //
         const emittedExpression = skipPartiallyEmittedExpressions(expression);
         if (isLeftHandSideExpression(emittedExpression)
-            && (emittedExpression.kind !== SyntaxKind.NewExpression || (<NewExpression>emittedExpression).arguments)
-            && emittedExpression.kind !== SyntaxKind.NumericLiteral) {
+            && (emittedExpression.kind !== SyntaxKind.NewExpression || (<NewExpression>emittedExpression).arguments)) {
             return <LeftHandSideExpression>expression;
         }
 
-        return createParen(expression, /*location*/ expression);
+        return setTextRange(createParen(expression), expression);
     }
 
     export function parenthesizePostfixOperand(operand: Expression) {
         return isLeftHandSideExpression(operand)
             ? <LeftHandSideExpression>operand
-            : createParen(operand, /*location*/ operand);
+            : setTextRange(createParen(operand), operand);
     }
 
     export function parenthesizePrefixOperand(operand: Expression) {
         return isUnaryExpression(operand)
             ? <UnaryExpression>operand
-            : createParen(operand, /*location*/ operand);
+            : setTextRange(createParen(operand), operand);
     }
 
-    function parenthesizeListElements(elements: NodeArray<Expression>) {
+    export function parenthesizeListElements(elements: NodeArray<Expression>) {
         let result: Expression[];
         for (let i = 0; i < elements.length; i++) {
             const element = parenthesizeExpressionForList(elements[i]);
@@ -2483,7 +3631,7 @@ namespace ts {
         }
 
         if (result !== undefined) {
-            return createNodeArray(result, elements, elements.hasTrailingComma);
+            return setTextRange(createNodeArray(result, elements.hasTrailingComma), elements);
         }
 
         return elements;
@@ -2495,7 +3643,7 @@ namespace ts {
         const commaPrecedence = getOperatorPrecedence(SyntaxKind.BinaryExpression, SyntaxKind.CommaToken);
         return expressionPrecedence > commaPrecedence
             ? expression
-            : createParen(expression, /*location*/ expression);
+            : setTextRange(createParen(expression), expression);
     }
 
     export function parenthesizeExpressionForExpressionStatement(expression: Expression) {
@@ -2505,34 +3653,47 @@ namespace ts {
             const kind = skipPartiallyEmittedExpressions(callee).kind;
             if (kind === SyntaxKind.FunctionExpression || kind === SyntaxKind.ArrowFunction) {
                 const mutableCall = getMutableClone(emittedExpression);
-                mutableCall.expression = createParen(callee, /*location*/ callee);
-                return recreatePartiallyEmittedExpressions(expression, mutableCall);
+                mutableCall.expression = setTextRange(createParen(callee), callee);
+                return recreateOuterExpressions(expression, mutableCall, OuterExpressionKinds.PartiallyEmittedExpressions);
             }
         }
         else {
             const leftmostExpressionKind = getLeftmostExpression(emittedExpression).kind;
             if (leftmostExpressionKind === SyntaxKind.ObjectLiteralExpression || leftmostExpressionKind === SyntaxKind.FunctionExpression) {
-                return createParen(expression, /*location*/ expression);
+                return setTextRange(createParen(expression), expression);
             }
         }
 
         return expression;
     }
 
-    /**
-     * Clones a series of not-emitted expressions with a new inner expression.
-     *
-     * @param originalOuterExpression The original outer expression.
-     * @param newInnerExpression The new inner expression.
-     */
-    function recreatePartiallyEmittedExpressions(originalOuterExpression: Expression, newInnerExpression: Expression) {
-        if (isPartiallyEmittedExpression(originalOuterExpression)) {
-            const clone = getMutableClone(originalOuterExpression);
-            clone.expression = recreatePartiallyEmittedExpressions(clone.expression, newInnerExpression);
-            return clone;
+    export function parenthesizeElementTypeMember(member: TypeNode) {
+        switch (member.kind) {
+            case SyntaxKind.UnionType:
+            case SyntaxKind.IntersectionType:
+            case SyntaxKind.FunctionType:
+            case SyntaxKind.ConstructorType:
+                return createParenthesizedType(member);
+        }
+        return member;
+    }
+
+    export function parenthesizeElementTypeMembers(members: TypeNode[]) {
+        return createNodeArray(sameMap(members, parenthesizeElementTypeMember));
+    }
+
+    export function parenthesizeTypeParameters(typeParameters: TypeNode[]) {
+        if (some(typeParameters)) {
+            const nodeArray = createNodeArray() as NodeArray<TypeNode>;
+            for (let i = 0; i < typeParameters.length; ++i) {
+                const entry = typeParameters[i];
+                nodeArray.push(i === 0 && isFunctionOrConstructorTypeNode(entry) && entry.typeParameters ?
+                    createParenthesizedType(entry) :
+                    entry);
+            }
+
+            return nodeArray;
         }
-
-        return newInnerExpression;
     }
 
     function getLeftmostExpression(node: Expression): Expression {
@@ -2566,9 +3727,8 @@ namespace ts {
     }
 
     export function parenthesizeConciseBody(body: ConciseBody): ConciseBody {
-        const emittedBody = skipPartiallyEmittedExpressions(body);
-        if (emittedBody.kind === SyntaxKind.ObjectLiteralExpression) {
-            return createParen(<Expression>body, /*location*/ body);
+        if (!isBlock(body) && getLeftmostExpression(body).kind === SyntaxKind.ObjectLiteralExpression) {
+            return setTextRange(createParen(<Expression>body), body);
         }
 
         return body;
@@ -2582,6 +3742,22 @@ namespace ts {
         All = Parentheses | Assertions | PartiallyEmittedExpressions
     }
 
+    export type OuterExpression = ParenthesizedExpression | TypeAssertion | AsExpression | NonNullExpression | PartiallyEmittedExpression;
+
+    export function isOuterExpression(node: Node, kinds = OuterExpressionKinds.All): node is OuterExpression {
+        switch (node.kind) {
+            case SyntaxKind.ParenthesizedExpression:
+                return (kinds & OuterExpressionKinds.Parentheses) !== 0;
+            case SyntaxKind.TypeAssertionExpression:
+            case SyntaxKind.AsExpression:
+            case SyntaxKind.NonNullExpression:
+                return (kinds & OuterExpressionKinds.Assertions) !== 0;
+            case SyntaxKind.PartiallyEmittedExpression:
+                return (kinds & OuterExpressionKinds.PartiallyEmittedExpressions) !== 0;
+        }
+        return false;
+    }
+
     export function skipOuterExpressions(node: Expression, kinds?: OuterExpressionKinds): Expression;
     export function skipOuterExpressions(node: Node, kinds?: OuterExpressionKinds): Node;
     export function skipOuterExpressions(node: Node, kinds = OuterExpressionKinds.All) {
@@ -2618,21 +3794,31 @@ namespace ts {
     export function skipAssertions(node: Expression): Expression;
     export function skipAssertions(node: Node): Node;
     export function skipAssertions(node: Node): Node {
-        while (isAssertionExpression(node)) {
-            node = (<AssertionExpression>node).expression;
+        while (isAssertionExpression(node) || node.kind === SyntaxKind.NonNullExpression) {
+            node = (<AssertionExpression | NonNullExpression>node).expression;
         }
 
         return node;
     }
 
-    export function skipPartiallyEmittedExpressions(node: Expression): Expression;
-    export function skipPartiallyEmittedExpressions(node: Node): Node;
-    export function skipPartiallyEmittedExpressions(node: Node) {
-        while (node.kind === SyntaxKind.PartiallyEmittedExpression) {
-            node = (<PartiallyEmittedExpression>node).expression;
+    function updateOuterExpression(outerExpression: OuterExpression, expression: Expression) {
+        switch (outerExpression.kind) {
+            case SyntaxKind.ParenthesizedExpression: return updateParen(outerExpression, expression);
+            case SyntaxKind.TypeAssertionExpression: return updateTypeAssertion(outerExpression, outerExpression.type, expression);
+            case SyntaxKind.AsExpression: return updateAsExpression(outerExpression, expression, outerExpression.type);
+            case SyntaxKind.NonNullExpression: return updateNonNullExpression(outerExpression, expression);
+            case SyntaxKind.PartiallyEmittedExpression: return updatePartiallyEmittedExpression(outerExpression, expression);
         }
+    }
 
-        return node;
+    export function recreateOuterExpressions(outerExpression: Expression | undefined, innerExpression: Expression, kinds = OuterExpressionKinds.All): Expression {
+        if (outerExpression && isOuterExpression(outerExpression, kinds)) {
+            return updateOuterExpression(
+                outerExpression,
+                recreateOuterExpressions(outerExpression.expression, innerExpression)
+            );
+        }
+        return innerExpression;
     }
 
     export function startOnNewLine<T extends Node>(node: T): T {
@@ -2640,202 +3826,41 @@ namespace ts {
         return node;
     }
 
-    export function setOriginalNode<T extends Node>(node: T, original: Node): T {
-        node.original = original;
-        if (original) {
-            const emitNode = original.emitNode;
-            if (emitNode) node.emitNode = mergeEmitNode(emitNode, node.emitNode);
-        }
-        return node;
-    }
-
-    function mergeEmitNode(sourceEmitNode: EmitNode, destEmitNode: EmitNode) {
-        const { flags, commentRange, sourceMapRange, tokenSourceMapRanges } = sourceEmitNode;
-        if (!destEmitNode && (flags || commentRange || sourceMapRange || tokenSourceMapRanges)) destEmitNode = {};
-        if (flags) destEmitNode.flags = flags;
-        if (commentRange) destEmitNode.commentRange = commentRange;
-        if (sourceMapRange) destEmitNode.sourceMapRange = sourceMapRange;
-        if (tokenSourceMapRanges) destEmitNode.tokenSourceMapRanges = mergeTokenSourceMapRanges(tokenSourceMapRanges, destEmitNode.tokenSourceMapRanges);
-        return destEmitNode;
-    }
-
-    function mergeTokenSourceMapRanges(sourceRanges: Map<TextRange>, destRanges: Map<TextRange>) {
-        if (!destRanges) destRanges = createMap<TextRange>();
-        copyProperties(sourceRanges, destRanges);
-        return destRanges;
+    export function getExternalHelpersModuleName(node: SourceFile) {
+        const parseNode = getOriginalNode(node, isSourceFile);
+        const emitNode = parseNode && parseNode.emitNode;
+        return emitNode && emitNode.externalHelpersModuleName;
     }
 
-    /**
-     * Clears any EmitNode entries from parse-tree nodes.
-     * @param sourceFile A source file.
-     */
-    export function disposeEmitNodes(sourceFile: SourceFile) {
-        // During transformation we may need to annotate a parse tree node with transient
-        // transformation properties. As parse tree nodes live longer than transformation
-        // nodes, we need to make sure we reclaim any memory allocated for custom ranges
-        // from these nodes to ensure we do not hold onto entire subtrees just for position
-        // information. We also need to reset these nodes to a pre-transformation state
-        // for incremental parsing scenarios so that we do not impact later emit.
-        sourceFile = getSourceFileOfNode(getParseTreeNode(sourceFile));
-        const emitNode = sourceFile && sourceFile.emitNode;
-        const annotatedNodes = emitNode && emitNode.annotatedNodes;
-        if (annotatedNodes) {
-            for (const node of annotatedNodes) {
-                node.emitNode = undefined;
+    export function getOrCreateExternalHelpersModuleNameIfNeeded(node: SourceFile, compilerOptions: CompilerOptions, hasExportStarsToExportValues?: boolean) {
+        if (compilerOptions.importHelpers && isEffectiveExternalModule(node, compilerOptions)) {
+            const externalHelpersModuleName = getExternalHelpersModuleName(node);
+            if (externalHelpersModuleName) {
+                return externalHelpersModuleName;
             }
-        }
-    }
 
-    /**
-     * Associates a node with the current transformation, initializing
-     * various transient transformation properties.
-     *
-     * @param node The node.
-     */
-    function getOrCreateEmitNode(node: Node) {
-        if (!node.emitNode) {
-            if (isParseTreeNode(node)) {
-                // To avoid holding onto transformation artifacts, we keep track of any
-                // parse tree node we are annotating. This allows us to clean them up after
-                // all transformations have completed.
-                if (node.kind === SyntaxKind.SourceFile) {
-                    return node.emitNode = { annotatedNodes: [node] };
+            const moduleKind = getEmitModuleKind(compilerOptions);
+            let create = hasExportStarsToExportValues
+                && moduleKind !== ModuleKind.System
+                && moduleKind !== ModuleKind.ES2015;
+            if (!create) {
+                const helpers = getEmitHelpers(node);
+                if (helpers) {
+                    for (const helper of helpers) {
+                        if (!helper.scoped) {
+                            create = true;
+                            break;
+                        }
+                    }
                 }
-
-                const sourceFile = getSourceFileOfNode(node);
-                getOrCreateEmitNode(sourceFile).annotatedNodes.push(node);
             }
 
-            node.emitNode = {};
-        }
-
-        return node.emitNode;
-    }
-
-    /**
-     * Gets flags that control emit behavior of a node.
-     *
-     * @param node The node.
-     */
-    export function getEmitFlags(node: Node) {
-        const emitNode = node.emitNode;
-        return emitNode && emitNode.flags;
-    }
-
-    /**
-     * Sets flags that control emit behavior of a node.
-     *
-     * @param node The node.
-     * @param emitFlags The NodeEmitFlags for the node.
-     */
-    export function setEmitFlags<T extends Node>(node: T, emitFlags: EmitFlags) {
-        getOrCreateEmitNode(node).flags = emitFlags;
-        return node;
-    }
-
-    /**
-     * Sets a custom text range to use when emitting source maps.
-     *
-     * @param node The node.
-     * @param range The text range.
-     */
-    export function setSourceMapRange<T extends Node>(node: T, range: TextRange) {
-        getOrCreateEmitNode(node).sourceMapRange = range;
-        return node;
-    }
-
-    /**
-     * Sets the TextRange to use for source maps for a token of a node.
-     *
-     * @param node The node.
-     * @param token The token.
-     * @param range The text range.
-     */
-    export function setTokenSourceMapRange<T extends Node>(node: T, token: SyntaxKind, range: TextRange) {
-        const emitNode = getOrCreateEmitNode(node);
-        const tokenSourceMapRanges = emitNode.tokenSourceMapRanges || (emitNode.tokenSourceMapRanges = createMap<TextRange>());
-        tokenSourceMapRanges[token] = range;
-        return node;
-    }
-
-    /**
-     * Sets a custom text range to use when emitting comments.
-     */
-    export function setCommentRange<T extends Node>(node: T, range: TextRange) {
-        getOrCreateEmitNode(node).commentRange = range;
-        return node;
-    }
-
-    /**
-     * Gets a custom text range to use when emitting comments.
-     *
-     * @param node The node.
-     */
-    export function getCommentRange(node: Node) {
-        const emitNode = node.emitNode;
-        return (emitNode && emitNode.commentRange) || node;
-    }
-
-    /**
-     * Gets a custom text range to use when emitting source maps.
-     *
-     * @param node The node.
-     */
-    export function getSourceMapRange(node: Node) {
-        const emitNode = node.emitNode;
-        return (emitNode && emitNode.sourceMapRange) || node;
-    }
-
-    /**
-     * Gets the TextRange to use for source maps for a token of a node.
-     *
-     * @param node The node.
-     * @param token The token.
-     */
-    export function getTokenSourceMapRange(node: Node, token: SyntaxKind) {
-        const emitNode = node.emitNode;
-        const tokenSourceMapRanges = emitNode && emitNode.tokenSourceMapRanges;
-        return tokenSourceMapRanges && tokenSourceMapRanges[token];
-    }
-
-    /**
-     * Gets the constant value to emit for an expression.
-     */
-    export function getConstantValue(node: PropertyAccessExpression | ElementAccessExpression) {
-        const emitNode = node.emitNode;
-        return emitNode && emitNode.constantValue;
-    }
-
-    /**
-     * Sets the constant value to emit for an expression.
-     */
-    export function setConstantValue(node: PropertyAccessExpression | ElementAccessExpression, value: number) {
-        const emitNode = getOrCreateEmitNode(node);
-        emitNode.constantValue = value;
-        return node;
-    }
-
-    export function setTextRange<T extends TextRange>(node: T, location: TextRange): T {
-        if (location) {
-            node.pos = location.pos;
-            node.end = location.end;
+            if (create) {
+                const parseNode = getOriginalNode(node, isSourceFile);
+                const emitNode = getOrCreateEmitNode(parseNode);
+                return emitNode.externalHelpersModuleName || (emitNode.externalHelpersModuleName = createUniqueName(externalHelpersModuleNameText));
+            }
         }
-        return node;
-    }
-
-    export function setNodeFlags<T extends Node>(node: T, flags: NodeFlags): T {
-        node.flags = flags;
-        return node;
-    }
-
-    export function setMultiLine<T extends ObjectLiteralExpression | ArrayLiteralExpression | Block>(node: T, multiLine: boolean): T {
-        node.multiLine = multiLine;
-        return node;
-    }
-
-    export function setHasTrailingComma<T extends Node>(nodes: NodeArray<T>, hasTrailingComma: boolean): NodeArray<T> {
-        nodes.hasTrailingComma = hasTrailingComma;
-        return nodes;
     }
 
     /**
@@ -2880,10 +3905,8 @@ namespace ts {
      * Here we check if alternative name was provided for a given moduleName and return it if possible.
      */
     function tryRenameExternalModule(moduleName: LiteralExpression, sourceFile: SourceFile) {
-        if (sourceFile.renamedDependencies && hasProperty(sourceFile.renamedDependencies, moduleName.text)) {
-            return createLiteral(sourceFile.renamedDependencies[moduleName.text]);
-        }
-        return undefined;
+        const rename = sourceFile.renamedDependencies && sourceFile.renamedDependencies.get(moduleName.text);
+        return rename && createLiteral(rename);
     }
 
     /**
@@ -2900,7 +3923,7 @@ namespace ts {
         if (file.moduleName) {
             return createLiteral(file.moduleName);
         }
-        if (!isDeclarationFile(file) && (options.out || options.outFile)) {
+        if (!file.isDeclarationFile && (options.out || options.outFile)) {
             return createLiteral(getExternalModuleNameFromPath(host, file.fileName));
         }
         return undefined;
@@ -2909,4 +3932,293 @@ namespace ts {
     function tryGetModuleNameFromDeclaration(declaration: ImportEqualsDeclaration | ImportDeclaration | ExportDeclaration, host: EmitHost, resolver: EmitResolver, compilerOptions: CompilerOptions) {
         return tryGetModuleNameFromFile(resolver.getExternalModuleFileFromDeclaration(declaration), host, compilerOptions);
     }
-}
\ No newline at end of file
+
+    /**
+     * Gets the initializer of an BindingOrAssignmentElement.
+     */
+    export function getInitializerOfBindingOrAssignmentElement(bindingElement: BindingOrAssignmentElement): Expression | undefined {
+        if (isDeclarationBindingElement(bindingElement)) {
+            // `1` in `let { a = 1 } = ...`
+            // `1` in `let { a: b = 1 } = ...`
+            // `1` in `let { a: {b} = 1 } = ...`
+            // `1` in `let { a: [b] = 1 } = ...`
+            // `1` in `let [a = 1] = ...`
+            // `1` in `let [{a} = 1] = ...`
+            // `1` in `let [[a] = 1] = ...`
+            return bindingElement.initializer;
+        }
+
+        if (isPropertyAssignment(bindingElement)) {
+            // `1` in `({ a: b = 1 } = ...)`
+            // `1` in `({ a: {b} = 1 } = ...)`
+            // `1` in `({ a: [b] = 1 } = ...)`
+            return isAssignmentExpression(bindingElement.initializer, /*excludeCompoundAssignment*/ true)
+                ? bindingElement.initializer.right
+                : undefined;
+        }
+
+        if (isShorthandPropertyAssignment(bindingElement)) {
+            // `1` in `({ a = 1 } = ...)`
+            return bindingElement.objectAssignmentInitializer;
+        }
+
+        if (isAssignmentExpression(bindingElement, /*excludeCompoundAssignment*/ true)) {
+            // `1` in `[a = 1] = ...`
+            // `1` in `[{a} = 1] = ...`
+            // `1` in `[[a] = 1] = ...`
+            return bindingElement.right;
+        }
+
+        if (isSpreadElement(bindingElement)) {
+            // Recovery consistent with existing emit.
+            return getInitializerOfBindingOrAssignmentElement(<BindingOrAssignmentElement>bindingElement.expression);
+        }
+    }
+
+    /**
+     * Gets the name of an BindingOrAssignmentElement.
+     */
+    export function getTargetOfBindingOrAssignmentElement(bindingElement: BindingOrAssignmentElement): BindingOrAssignmentElementTarget {
+        if (isDeclarationBindingElement(bindingElement)) {
+            // `a` in `let { a } = ...`
+            // `a` in `let { a = 1 } = ...`
+            // `b` in `let { a: b } = ...`
+            // `b` in `let { a: b = 1 } = ...`
+            // `a` in `let { ...a } = ...`
+            // `{b}` in `let { a: {b} } = ...`
+            // `{b}` in `let { a: {b} = 1 } = ...`
+            // `[b]` in `let { a: [b] } = ...`
+            // `[b]` in `let { a: [b] = 1 } = ...`
+            // `a` in `let [a] = ...`
+            // `a` in `let [a = 1] = ...`
+            // `a` in `let [...a] = ...`
+            // `{a}` in `let [{a}] = ...`
+            // `{a}` in `let [{a} = 1] = ...`
+            // `[a]` in `let [[a]] = ...`
+            // `[a]` in `let [[a] = 1] = ...`
+            return <ObjectBindingPattern | ArrayBindingPattern | Identifier>bindingElement.name;
+        }
+
+        if (isObjectLiteralElementLike(bindingElement)) {
+            switch (bindingElement.kind) {
+                case SyntaxKind.PropertyAssignment:
+                    // `b` in `({ a: b } = ...)`
+                    // `b` in `({ a: b = 1 } = ...)`
+                    // `{b}` in `({ a: {b} } = ...)`
+                    // `{b}` in `({ a: {b} = 1 } = ...)`
+                    // `[b]` in `({ a: [b] } = ...)`
+                    // `[b]` in `({ a: [b] = 1 } = ...)`
+                    // `b.c` in `({ a: b.c } = ...)`
+                    // `b.c` in `({ a: b.c = 1 } = ...)`
+                    // `b[0]` in `({ a: b[0] } = ...)`
+                    // `b[0]` in `({ a: b[0] = 1 } = ...)`
+                    return getTargetOfBindingOrAssignmentElement(<BindingOrAssignmentElement>bindingElement.initializer);
+
+                case SyntaxKind.ShorthandPropertyAssignment:
+                    // `a` in `({ a } = ...)`
+                    // `a` in `({ a = 1 } = ...)`
+                    return bindingElement.name;
+
+                case SyntaxKind.SpreadAssignment:
+                    // `a` in `({ ...a } = ...)`
+                    return getTargetOfBindingOrAssignmentElement(<BindingOrAssignmentElement>bindingElement.expression);
+            }
+
+            // no target
+            return undefined;
+        }
+
+        if (isAssignmentExpression(bindingElement, /*excludeCompoundAssignment*/ true)) {
+            // `a` in `[a = 1] = ...`
+            // `{a}` in `[{a} = 1] = ...`
+            // `[a]` in `[[a] = 1] = ...`
+            // `a.b` in `[a.b = 1] = ...`
+            // `a[0]` in `[a[0] = 1] = ...`
+            return getTargetOfBindingOrAssignmentElement(<BindingOrAssignmentElement>bindingElement.left);
+        }
+
+        if (isSpreadElement(bindingElement)) {
+            // `a` in `[...a] = ...`
+            return getTargetOfBindingOrAssignmentElement(<BindingOrAssignmentElement>bindingElement.expression);
+        }
+
+        // `a` in `[a] = ...`
+        // `{a}` in `[{a}] = ...`
+        // `[a]` in `[[a]] = ...`
+        // `a.b` in `[a.b] = ...`
+        // `a[0]` in `[a[0]] = ...`
+        return bindingElement;
+    }
+
+    /**
+     * Determines whether an BindingOrAssignmentElement is a rest element.
+     */
+    export function getRestIndicatorOfBindingOrAssignmentElement(bindingElement: BindingOrAssignmentElement): BindingOrAssignmentElementRestIndicator {
+        switch (bindingElement.kind) {
+            case SyntaxKind.Parameter:
+            case SyntaxKind.BindingElement:
+                // `...` in `let [...a] = ...`
+                return (<ParameterDeclaration | BindingElement>bindingElement).dotDotDotToken;
+
+            case SyntaxKind.SpreadElement:
+            case SyntaxKind.SpreadAssignment:
+                // `...` in `[...a] = ...`
+                return <SpreadElement | SpreadAssignment>bindingElement;
+        }
+
+        return undefined;
+    }
+
+    /**
+     * Gets the property name of a BindingOrAssignmentElement
+     */
+    export function getPropertyNameOfBindingOrAssignmentElement(bindingElement: BindingOrAssignmentElement) {
+        switch (bindingElement.kind) {
+            case SyntaxKind.BindingElement:
+                // `a` in `let { a: b } = ...`
+                // `[a]` in `let { [a]: b } = ...`
+                // `"a"` in `let { "a": b } = ...`
+                // `1` in `let { 1: b } = ...`
+                if ((<BindingElement>bindingElement).propertyName) {
+                    const propertyName = (<BindingElement>bindingElement).propertyName;
+                    return isComputedPropertyName(propertyName) && isStringOrNumericLiteral(propertyName.expression)
+                        ? propertyName.expression
+                        : propertyName;
+                }
+
+                break;
+
+            case SyntaxKind.PropertyAssignment:
+                // `a` in `({ a: b } = ...)`
+                // `[a]` in `({ [a]: b } = ...)`
+                // `"a"` in `({ "a": b } = ...)`
+                // `1` in `({ 1: b } = ...)`
+                if ((<PropertyAssignment>bindingElement).name) {
+                    const propertyName = (<PropertyAssignment>bindingElement).name;
+                    return isComputedPropertyName(propertyName) && isStringOrNumericLiteral(propertyName.expression)
+                        ? propertyName.expression
+                        : propertyName;
+                }
+
+                break;
+
+            case SyntaxKind.SpreadAssignment:
+                // `a` in `({ ...a } = ...)`
+                return (<SpreadAssignment>bindingElement).name;
+        }
+
+        const target = getTargetOfBindingOrAssignmentElement(bindingElement);
+        if (target && isPropertyName(target)) {
+            return isComputedPropertyName(target) && isStringOrNumericLiteral(target.expression)
+                ? target.expression
+                : target;
+        }
+
+        Debug.fail("Invalid property name for binding element.");
+    }
+
+    /**
+     * Gets the elements of a BindingOrAssignmentPattern
+     */
+    export function getElementsOfBindingOrAssignmentPattern(name: BindingOrAssignmentPattern): BindingOrAssignmentElement[] {
+        switch (name.kind) {
+            case SyntaxKind.ObjectBindingPattern:
+            case SyntaxKind.ArrayBindingPattern:
+            case SyntaxKind.ArrayLiteralExpression:
+                // `a` in `{a}`
+                // `a` in `[a]`
+                return <BindingOrAssignmentElement[]>name.elements;
+
+            case SyntaxKind.ObjectLiteralExpression:
+                // `a` in `{a}`
+                return <BindingOrAssignmentElement[]>name.properties;
+        }
+    }
+
+    export function convertToArrayAssignmentElement(element: BindingOrAssignmentElement) {
+        if (isBindingElement(element)) {
+            if (element.dotDotDotToken) {
+                Debug.assertNode(element.name, isIdentifier);
+                return setOriginalNode(setTextRange(createSpread(<Identifier>element.name), element), element);
+            }
+            const expression = convertToAssignmentElementTarget(<ObjectBindingPattern | ArrayBindingPattern | Identifier>element.name);
+            return element.initializer
+                ? setOriginalNode(
+                    setTextRange(
+                        createAssignment(expression, element.initializer),
+                        element
+                    ),
+                    element
+                )
+                : expression;
+        }
+        Debug.assertNode(element, isExpression);
+        return <Expression>element;
+    }
+
+    export function convertToObjectAssignmentElement(element: BindingOrAssignmentElement) {
+        if (isBindingElement(element)) {
+            if (element.dotDotDotToken) {
+                Debug.assertNode(element.name, isIdentifier);
+                return setOriginalNode(setTextRange(createSpreadAssignment(<Identifier>element.name), element), element);
+            }
+            if (element.propertyName) {
+                const expression = convertToAssignmentElementTarget(<ObjectBindingPattern | ArrayBindingPattern | Identifier>element.name);
+                return setOriginalNode(setTextRange(createPropertyAssignment(element.propertyName, element.initializer ? createAssignment(expression, element.initializer) : expression), element), element);
+            }
+            Debug.assertNode(element.name, isIdentifier);
+            return setOriginalNode(setTextRange(createShorthandPropertyAssignment(<Identifier>element.name, element.initializer), element), element);
+        }
+        Debug.assertNode(element, isObjectLiteralElementLike);
+        return <ObjectLiteralElementLike>element;
+    }
+
+    export function convertToAssignmentPattern(node: BindingOrAssignmentPattern): AssignmentPattern {
+        switch (node.kind) {
+            case SyntaxKind.ArrayBindingPattern:
+            case SyntaxKind.ArrayLiteralExpression:
+                return convertToArrayAssignmentPattern(node);
+
+            case SyntaxKind.ObjectBindingPattern:
+            case SyntaxKind.ObjectLiteralExpression:
+                return convertToObjectAssignmentPattern(node);
+        }
+    }
+
+    export function convertToObjectAssignmentPattern(node: ObjectBindingOrAssignmentPattern) {
+        if (isObjectBindingPattern(node)) {
+            return setOriginalNode(
+                setTextRange(
+                    createObjectLiteral(map(node.elements, convertToObjectAssignmentElement)),
+                    node
+                ),
+                node
+            );
+        }
+        Debug.assertNode(node, isObjectLiteralExpression);
+        return <ObjectLiteralExpression>node;
+    }
+
+    export function convertToArrayAssignmentPattern(node: ArrayBindingOrAssignmentPattern) {
+        if (isArrayBindingPattern(node)) {
+            return setOriginalNode(
+                setTextRange(
+                    createArrayLiteral(map(node.elements, convertToArrayAssignmentElement)),
+                    node
+                ),
+                node
+            );
+        }
+        Debug.assertNode(node, isArrayLiteralExpression);
+        return <ArrayLiteralExpression>node;
+    }
+
+    export function convertToAssignmentElementTarget(node: BindingOrAssignmentElementTarget): Expression {
+        if (isBindingPattern(node)) {
+            return convertToAssignmentPattern(node);
+        }
+
+        Debug.assertNode(node, isExpression);
+        return <Expression>node;
+    }
+}
diff --git a/src/compiler/moduleNameResolver.ts b/src/compiler/moduleNameResolver.ts
index ca70217..4ea5909 100644
--- a/src/compiler/moduleNameResolver.ts
+++ b/src/compiler/moduleNameResolver.ts
@@ -2,10 +2,9 @@
 /// <reference path="diagnosticInformationMap.generated.ts" />
 
 namespace ts {
-
     /* @internal */
     export function trace(host: ModuleResolutionHost, message: DiagnosticMessage, ...args: any[]): void;
-    export function trace(host: ModuleResolutionHost, message: DiagnosticMessage): void {
+    export function trace(host: ModuleResolutionHost): void {
         host.trace(formatMessage.apply(undefined, arguments));
     }
 
@@ -14,59 +13,84 @@ namespace ts {
         return compilerOptions.traceResolution && host.trace !== undefined;
     }
 
+    /** Array that is only intended to be pushed to, never read. */
     /* @internal */
-    export function createResolvedModule(resolvedFileName: string, isExternalLibraryImport: boolean, failedLookupLocations: string[]): ResolvedModuleWithFailedLookupLocations {
-        return { resolvedModule: resolvedFileName ? { resolvedFileName, isExternalLibraryImport } : undefined, failedLookupLocations };
+    export interface Push<T> {
+        push(value: T): void;
+    }
+
+    /**
+     * Result of trying to resolve a module.
+     * At least one of `ts` and `js` should be defined, or the whole thing should be `undefined`.
+     */
+    interface Resolved {
+        path: string;
+        extension: Extension;
+    }
+
+    /**
+     * Kinds of file that we are currently looking for.
+     * Typically there is one pass with Extensions.TypeScript, then a second pass with Extensions.JavaScript.
+     */
+    enum Extensions {
+        TypeScript, /** '.ts', '.tsx', or '.d.ts' */
+        JavaScript, /** '.js' or '.jsx' */
+        DtsOnly /** Only '.d.ts' */
+    }
+
+    /** Used with `Extensions.DtsOnly` to extract the path from TypeScript results. */
+    function resolvedTypeScriptOnly(resolved: Resolved | undefined): string | undefined {
+        if (!resolved) {
+            return undefined;
+        }
+        Debug.assert(extensionIsTypeScript(resolved.extension));
+        return resolved.path;
+    }
+
+    function createResolvedModuleWithFailedLookupLocations(resolved: Resolved | undefined, isExternalLibraryImport: boolean, failedLookupLocations: string[]): ResolvedModuleWithFailedLookupLocations {
+        return {
+            resolvedModule: resolved && { resolvedFileName: resolved.path, extension: resolved.extension, isExternalLibraryImport },
+            failedLookupLocations
+        };
     }
 
-    function moduleHasNonRelativeName(moduleName: string): boolean {
+    export function moduleHasNonRelativeName(moduleName: string): boolean {
         return !(isRootedDiskPath(moduleName) || isExternalModuleNameRelative(moduleName));
     }
 
-    /* @internal */
-    export interface ModuleResolutionState {
+    interface ModuleResolutionState {
         host: ModuleResolutionHost;
         compilerOptions: CompilerOptions;
         traceEnabled: boolean;
-        // skip .tsx files if jsx is not enabled
-        skipTsx: boolean;
     }
 
-    function tryReadTypesSection(packageJsonPath: string, baseDirectory: string, state: ModuleResolutionState): string {
+    /** Reads from "main" or "types"/"typings" depending on `extensions`. */
+    function tryReadPackageJsonFields(readTypes: boolean, packageJsonPath: string, baseDirectory: string, state: ModuleResolutionState): string | undefined {
         const jsonContent = readJson(packageJsonPath, state.host);
+        return readTypes ? tryReadFromField("typings") || tryReadFromField("types") : tryReadFromField("main");
 
-        function tryReadFromField(fieldName: string) {
-            if (hasProperty(jsonContent, fieldName)) {
-                const typesFile = (<any>jsonContent)[fieldName];
-                if (typeof typesFile === "string") {
-                    const typesFilePath = normalizePath(combinePaths(baseDirectory, typesFile));
-                    if (state.traceEnabled) {
-                        trace(state.host, Diagnostics.package_json_has_0_field_1_that_references_2, fieldName, typesFile, typesFilePath);
-                    }
-                    return typesFilePath;
-                }
-                else {
-                    if (state.traceEnabled) {
-                        trace(state.host, Diagnostics.Expected_type_of_0_field_in_package_json_to_be_string_got_1, fieldName, typeof typesFile);
-                    }
+        function tryReadFromField(fieldName: "typings" | "types" | "main"): string | undefined {
+            if (!hasProperty(jsonContent, fieldName)) {
+                if (state.traceEnabled) {
+                    trace(state.host, Diagnostics.package_json_does_not_have_a_0_field, fieldName);
                 }
+                return;
             }
-        }
 
-        const typesFilePath = tryReadFromField("typings") || tryReadFromField("types");
-        if (typesFilePath) {
-            return typesFilePath;
-        }
+            const fileName = jsonContent[fieldName];
+            if (typeof fileName !== "string") {
+                if (state.traceEnabled) {
+                    trace(state.host, Diagnostics.Expected_type_of_0_field_in_package_json_to_be_string_got_1, fieldName, typeof fileName);
+                }
+                return;
+            }
 
-        // Use the main module for inferring types if no types package specified and the allowJs is set
-        if (state.compilerOptions.allowJs && jsonContent.main && typeof jsonContent.main === "string") {
+            const path = normalizePath(combinePaths(baseDirectory, fileName));
             if (state.traceEnabled) {
-                trace(state.host, Diagnostics.No_types_specified_in_package_json_but_allowJs_is_set_so_returning_main_value_of_0, jsonContent.main);
+                trace(state.host, Diagnostics.package_json_has_0_field_1_that_references_2, fieldName, fileName, path);
             }
-            const mainFilePath = normalizePath(combinePaths(baseDirectory, jsonContent.main));
-            return mainFilePath;
+            return path;
         }
-        return undefined;
     }
 
     function readJson(path: string, host: ModuleResolutionHost): { typings?: string, types?: string, main?: string } {
@@ -80,8 +104,6 @@ namespace ts {
         }
     }
 
-    const typeReferenceExtensions = [".d.ts"];
-
     export function getEffectiveTypeRoots(options: CompilerOptions, host: { directoryExists?: (directoryName: string) => boolean, getCurrentDirectory?: () => string }): string[] | undefined {
         if (options.typeRoots) {
             return options.typeRoots;
@@ -95,7 +117,9 @@ namespace ts {
             currentDirectory = host.getCurrentDirectory();
         }
 
-        return currentDirectory && getDefaultTypeRoots(currentDirectory, host);
+        if (currentDirectory !== undefined) {
+            return getDefaultTypeRoots(currentDirectory, host);
+        }
     }
 
     /**
@@ -109,20 +133,13 @@ namespace ts {
         }
 
         let typeRoots: string[];
-
-        while (true) {
-            const atTypes = combinePaths(currentDirectory, nodeModulesAtTypes);
+        forEachAncestorDirectory(ts.normalizePath(currentDirectory), directory => {
+            const atTypes = combinePaths(directory, nodeModulesAtTypes);
             if (host.directoryExists(atTypes)) {
                 (typeRoots || (typeRoots = [])).push(atTypes);
             }
-
-            const parent = getDirectoryPath(currentDirectory);
-            if (parent === currentDirectory) {
-                break;
-            }
-            currentDirectory = parent;
-        }
-
+            return undefined;
+        });
         return typeRoots;
     }
     const nodeModulesAtTypes = combinePaths("node_modules", "@types");
@@ -132,12 +149,11 @@ namespace ts {
      * This is possible in case if resolution is performed for directives specified via 'types' parameter. In this case initial path for secondary lookups
      * is assumed to be the same as root directory of the project.
      */
-    export function resolveTypeReferenceDirective(typeReferenceDirectiveName: string, containingFile: string, options: CompilerOptions, host: ModuleResolutionHost): ResolvedTypeReferenceDirectiveWithFailedLookupLocations {
+    export function resolveTypeReferenceDirective(typeReferenceDirectiveName: string, containingFile: string | undefined, options: CompilerOptions, host: ModuleResolutionHost): ResolvedTypeReferenceDirectiveWithFailedLookupLocations {
         const traceEnabled = isTraceEnabled(options, host);
         const moduleResolutionState: ModuleResolutionState = {
             compilerOptions: options,
             host: host,
-            skipTsx: true,
             traceEnabled
         };
 
@@ -163,77 +179,81 @@ namespace ts {
 
         const failedLookupLocations: string[] = [];
 
-        // Check primary library paths
-        if (typeRoots && typeRoots.length) {
-            if (traceEnabled) {
-                trace(host, Diagnostics.Resolving_with_primary_search_path_0, typeRoots.join(", "));
-            }
-            const primarySearchPaths = typeRoots;
-            for (const typeRoot of primarySearchPaths) {
-                const candidate = combinePaths(typeRoot, typeReferenceDirectiveName);
-                const candidateDirectory = getDirectoryPath(candidate);
-                const resolvedFile = loadNodeModuleFromDirectory(typeReferenceExtensions, candidate, failedLookupLocations,
-                    !directoryProbablyExists(candidateDirectory, host), moduleResolutionState);
-
-                if (resolvedFile) {
-                    if (traceEnabled) {
-                        trace(host, Diagnostics.Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2, typeReferenceDirectiveName, resolvedFile, true);
-                    }
-                    return {
-                        resolvedTypeReferenceDirective: { primary: true, resolvedFileName: resolvedFile },
-                        failedLookupLocations
-                    };
-                }
-            }
+        let resolved = primaryLookup();
+        let primary = true;
+        if (!resolved) {
+            resolved = secondaryLookup();
+            primary = false;
         }
-        else {
+
+        let resolvedTypeReferenceDirective: ResolvedTypeReferenceDirective | undefined;
+        if (resolved) {
+            resolved = realpath(resolved, host, traceEnabled);
             if (traceEnabled) {
-                trace(host, Diagnostics.Root_directory_cannot_be_determined_skipping_primary_search_paths);
+                trace(host, Diagnostics.Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2, typeReferenceDirectiveName, resolved, primary);
             }
+            resolvedTypeReferenceDirective = { primary, resolvedFileName: resolved };
         }
 
-        let resolvedFile: string;
-        let initialLocationForSecondaryLookup: string;
-        if (containingFile) {
-            initialLocationForSecondaryLookup = getDirectoryPath(containingFile);
-        }
+        return { resolvedTypeReferenceDirective, failedLookupLocations };
 
-        if (initialLocationForSecondaryLookup !== undefined) {
-            // check secondary locations
-            if (traceEnabled) {
-                trace(host, Diagnostics.Looking_up_in_node_modules_folder_initial_location_0, initialLocationForSecondaryLookup);
+        function primaryLookup(): string | undefined {
+            // Check primary library paths
+            if (typeRoots && typeRoots.length) {
+                if (traceEnabled) {
+                    trace(host, Diagnostics.Resolving_with_primary_search_path_0, typeRoots.join(", "));
+                }
+                return forEach(typeRoots, typeRoot => {
+                    const candidate = combinePaths(typeRoot, typeReferenceDirectiveName);
+                    const candidateDirectory = getDirectoryPath(candidate);
+                    const directoryExists = directoryProbablyExists(candidateDirectory, host);
+                    if (!directoryExists && traceEnabled) {
+                        trace(host, Diagnostics.Directory_0_does_not_exist_skipping_all_lookups_in_it, candidateDirectory);
+                    }
+                    return resolvedTypeScriptOnly(
+                        loadNodeModuleFromDirectory(Extensions.DtsOnly, candidate, failedLookupLocations,
+                            !directoryExists, moduleResolutionState));
+                });
             }
-            resolvedFile = loadModuleFromNodeModules(typeReferenceDirectiveName, initialLocationForSecondaryLookup, failedLookupLocations, moduleResolutionState, /*checkOneLevel*/ false);
-            if (traceEnabled) {
-                if (resolvedFile) {
-                    trace(host, Diagnostics.Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2, typeReferenceDirectiveName, resolvedFile, false);
+            else {
+                if (traceEnabled) {
+                    trace(host, Diagnostics.Root_directory_cannot_be_determined_skipping_primary_search_paths);
                 }
-                else {
+            }
+        }
+
+        function secondaryLookup(): string | undefined {
+            let resolvedFile: string;
+            const initialLocationForSecondaryLookup = containingFile && getDirectoryPath(containingFile);
+
+            if (initialLocationForSecondaryLookup !== undefined) {
+                // check secondary locations
+                if (traceEnabled) {
+                    trace(host, Diagnostics.Looking_up_in_node_modules_folder_initial_location_0, initialLocationForSecondaryLookup);
+                }
+                const result = loadModuleFromNodeModules(Extensions.DtsOnly, typeReferenceDirectiveName, initialLocationForSecondaryLookup, failedLookupLocations, moduleResolutionState, /*cache*/ undefined);
+                resolvedFile = resolvedTypeScriptOnly(result && result.value);
+                if (!resolvedFile && traceEnabled) {
                     trace(host, Diagnostics.Type_reference_directive_0_was_not_resolved, typeReferenceDirectiveName);
                 }
+                return resolvedFile;
             }
-        }
-        else {
-            if (traceEnabled) {
-                trace(host, Diagnostics.Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_modules_folder);
+            else {
+                if (traceEnabled) {
+                    trace(host, Diagnostics.Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_modules_folder);
+                }
             }
         }
-        return {
-            resolvedTypeReferenceDirective: resolvedFile
-                ? { primary: false, resolvedFileName: resolvedFile }
-                : undefined,
-            failedLookupLocations
-        };
     }
 
     /**
-      * Given a set of options, returns the set of type directive names
-      *   that should be included for this program automatically.
-      * This list could either come from the config file,
-      *   or from enumerating the types root + initial secondary types lookup location.
-      * More type directives might appear in the program later as a result of loading actual source files;
-      *   this list is only the set of defaults that are implicitly included.
-      */
+     * Given a set of options, returns the set of type directive names
+     *   that should be included for this program automatically.
+     * This list could either come from the config file,
+     *   or from enumerating the types root + initial secondary types lookup location.
+     * More type directives might appear in the program later as a result of loading actual source files;
+     *   this list is only the set of defaults that are implicitly included.
+     */
     export function getAutomaticTypeDirectiveNames(options: CompilerOptions, host: ModuleResolutionHost): string[] {
         // Use explicit type list from tsconfig.json
         if (options.types) {
@@ -264,33 +284,174 @@ namespace ts {
         return result;
     }
 
-    export function resolveModuleName(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost): ResolvedModuleWithFailedLookupLocations {
+    /**
+     * Cached module resolutions per containing directory.
+     * This assumes that any module id will have the same resolution for sibling files located in the same folder.
+     */
+    export interface ModuleResolutionCache extends NonRelativeModuleNameResolutionCache {
+        getOrCreateCacheForDirectory(directoryName: string): Map<ResolvedModuleWithFailedLookupLocations>;
+    }
+
+    /**
+     * Stored map from non-relative module name to a table: directory -> result of module lookup in this directory
+     * We support only non-relative module names because resolution of relative module names is usually more deterministic and thus less expensive.
+     */
+    export interface NonRelativeModuleNameResolutionCache {
+        getOrCreateCacheForModuleName(nonRelativeModuleName: string): PerModuleNameCache;
+    }
+
+    export interface PerModuleNameCache {
+        get(directory: string): ResolvedModuleWithFailedLookupLocations;
+        set(directory: string, result: ResolvedModuleWithFailedLookupLocations): void;
+    }
+
+    export function createModuleResolutionCache(currentDirectory: string, getCanonicalFileName: (s: string) => string): ModuleResolutionCache {
+        const directoryToModuleNameMap = createFileMap<Map<ResolvedModuleWithFailedLookupLocations>>();
+        const moduleNameToDirectoryMap = createMap<PerModuleNameCache>();
+
+        return { getOrCreateCacheForDirectory, getOrCreateCacheForModuleName };
+
+        function getOrCreateCacheForDirectory(directoryName: string) {
+            const path = toPath(directoryName, currentDirectory, getCanonicalFileName);
+            let perFolderCache = directoryToModuleNameMap.get(path);
+            if (!perFolderCache) {
+                perFolderCache = createMap<ResolvedModuleWithFailedLookupLocations>();
+                directoryToModuleNameMap.set(path, perFolderCache);
+            }
+            return perFolderCache;
+        }
+
+        function getOrCreateCacheForModuleName(nonRelativeModuleName: string) {
+            if (!moduleHasNonRelativeName(nonRelativeModuleName)) {
+                return undefined;
+            }
+            let perModuleNameCache = moduleNameToDirectoryMap.get(nonRelativeModuleName);
+            if (!perModuleNameCache) {
+                perModuleNameCache = createPerModuleNameCache();
+                moduleNameToDirectoryMap.set(nonRelativeModuleName, perModuleNameCache);
+            }
+            return perModuleNameCache;
+        }
+
+        function createPerModuleNameCache(): PerModuleNameCache {
+            const directoryPathMap = createFileMap<ResolvedModuleWithFailedLookupLocations>();
+
+            return { get, set };
+
+            function get(directory: string): ResolvedModuleWithFailedLookupLocations {
+                return directoryPathMap.get(toPath(directory, currentDirectory, getCanonicalFileName));
+            }
+
+            /**
+             * At first this function add entry directory -> module resolution result to the table.
+             * Then it computes the set of parent folders for 'directory' that should have the same module resolution result
+             * and for every parent folder in set it adds entry: parent -> module resolution. .
+             * Lets say we first directory name: /a/b/c/d/e and resolution result is: /a/b/bar.ts.
+             * Set of parent folders that should have the same result will be:
+             * [
+             *     /a/b/c/d, /a/b/c, /a/b
+             * ]
+             * this means that request for module resolution from file in any of these folder will be immediately found in cache.
+             */
+            function set(directory: string, result: ResolvedModuleWithFailedLookupLocations): void {
+                const path = toPath(directory, currentDirectory, getCanonicalFileName);
+                // if entry is already in cache do nothing
+                if (directoryPathMap.contains(path)) {
+                    return;
+                }
+                directoryPathMap.set(path, result);
+
+                const resolvedFileName = result.resolvedModule && result.resolvedModule.resolvedFileName;
+                // find common prefix between directory and resolved file name
+                // this common prefix should be the shorted path that has the same resolution
+                // directory: /a/b/c/d/e
+                // resolvedFileName: /a/b/foo.d.ts
+                const commonPrefix = getCommonPrefix(path, resolvedFileName);
+                let current = path;
+                while (true) {
+                    const parent = getDirectoryPath(current);
+                    if (parent === current || directoryPathMap.contains(parent)) {
+                        break;
+                    }
+                    directoryPathMap.set(parent, result);
+                    current = parent;
+
+                    if (current === commonPrefix) {
+                        break;
+                    }
+                }
+            }
+
+            function getCommonPrefix(directory: Path, resolution: string) {
+                if (resolution === undefined) {
+                    return undefined;
+                }
+                const resolutionDirectory = toPath(getDirectoryPath(resolution), currentDirectory, getCanonicalFileName);
+
+                // find first position where directory and resolution differs
+                let i = 0;
+                while (i < Math.min(directory.length, resolutionDirectory.length) && directory.charCodeAt(i) === resolutionDirectory.charCodeAt(i)) {
+                    i++;
+                }
+
+                // find last directory separator before position i
+                const sep = directory.lastIndexOf(directorySeparator, i);
+                if (sep < 0) {
+                    return undefined;
+                }
+
+                return directory.substr(0, sep);
+            }
+        }
+    }
+
+    export function resolveModuleName(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost, cache?: ModuleResolutionCache): ResolvedModuleWithFailedLookupLocations {
         const traceEnabled = isTraceEnabled(compilerOptions, host);
         if (traceEnabled) {
             trace(host, Diagnostics.Resolving_module_0_from_1, moduleName, containingFile);
         }
+        const containingDirectory = getDirectoryPath(containingFile);
+        const perFolderCache = cache && cache.getOrCreateCacheForDirectory(containingDirectory);
+        let result = perFolderCache && perFolderCache.get(moduleName);
 
-        let moduleResolution = compilerOptions.moduleResolution;
-        if (moduleResolution === undefined) {
-            moduleResolution = getEmitModuleKind(compilerOptions) === ModuleKind.CommonJS ? ModuleResolutionKind.NodeJs : ModuleResolutionKind.Classic;
+        if (result) {
             if (traceEnabled) {
-                trace(host, Diagnostics.Module_resolution_kind_is_not_specified_using_0, ModuleResolutionKind[moduleResolution]);
+                trace(host, Diagnostics.Resolution_for_module_0_was_found_in_cache, moduleName);
             }
         }
         else {
-            if (traceEnabled) {
-                trace(host, Diagnostics.Explicitly_specified_module_resolution_kind_Colon_0, ModuleResolutionKind[moduleResolution]);
+            let moduleResolution = compilerOptions.moduleResolution;
+            if (moduleResolution === undefined) {
+                moduleResolution = getEmitModuleKind(compilerOptions) === ModuleKind.CommonJS ? ModuleResolutionKind.NodeJs : ModuleResolutionKind.Classic;
+                if (traceEnabled) {
+                    trace(host, Diagnostics.Module_resolution_kind_is_not_specified_using_0, ModuleResolutionKind[moduleResolution]);
+                }
+            }
+            else {
+                if (traceEnabled) {
+                    trace(host, Diagnostics.Explicitly_specified_module_resolution_kind_Colon_0, ModuleResolutionKind[moduleResolution]);
+                }
+            }
+
+            switch (moduleResolution) {
+                case ModuleResolutionKind.NodeJs:
+                    result = nodeModuleNameResolver(moduleName, containingFile, compilerOptions, host, cache);
+                    break;
+                case ModuleResolutionKind.Classic:
+                    result = classicNameResolver(moduleName, containingFile, compilerOptions, host, cache);
+                    break;
+                default:
+                    Debug.fail(`Unexpected moduleResolution: ${moduleResolution}`);
             }
-        }
 
-        let result: ResolvedModuleWithFailedLookupLocations;
-        switch (moduleResolution) {
-            case ModuleResolutionKind.NodeJs:
-                result = nodeModuleNameResolver(moduleName, containingFile, compilerOptions, host);
-                break;
-            case ModuleResolutionKind.Classic:
-                result = classicNameResolver(moduleName, containingFile, compilerOptions, host);
-                break;
+            if (perFolderCache) {
+                perFolderCache.set(moduleName, result);
+                // put result in per-module name cache
+                const perModuleNameCache = cache.getOrCreateCacheForModuleName(moduleName);
+                if (perModuleNameCache) {
+                    perModuleNameCache.set(containingDirectory, result);
+                }
+            }
         }
 
         if (traceEnabled) {
@@ -313,7 +474,7 @@ namespace ts {
      * 'typings' entry or file 'index' with some supported extension
      * - Classic loader will only try to interpret '/a/b/c' as file.
      */
-    type ResolutionKindSpecificLoader = (candidate: string, extensions: string[], failedLookupLocations: string[], onlyRecordFailures: boolean, state: ModuleResolutionState) => string;
+    type ResolutionKindSpecificLoader = (extensions: Extensions, candidate: string, failedLookupLocations: Push<string>, onlyRecordFailures: boolean, state: ModuleResolutionState) => Resolved | undefined;
 
     /**
      * Any module resolution kind can be augmented with optional settings: 'baseUrl', 'paths' and 'rootDirs' - they are used to
@@ -375,19 +536,19 @@ namespace ts {
      * be converted to a path relative to found rootDir entry './content/protocols/file2' (*). As a last step compiler will check all remaining
      * entries in 'rootDirs', use them to build absolute path out of (*) and try to resolve module from this location.
      */
-    function tryLoadModuleUsingOptionalResolutionSettings(moduleName: string, containingDirectory: string, loader: ResolutionKindSpecificLoader,
-        failedLookupLocations: string[], supportedExtensions: string[], state: ModuleResolutionState): string {
+    function tryLoadModuleUsingOptionalResolutionSettings(extensions: Extensions, moduleName: string, containingDirectory: string, loader: ResolutionKindSpecificLoader,
+        failedLookupLocations: Push<string>, state: ModuleResolutionState): Resolved | undefined {
 
         if (moduleHasNonRelativeName(moduleName)) {
-            return tryLoadModuleUsingBaseUrl(moduleName, loader, failedLookupLocations, supportedExtensions, state);
+            return tryLoadModuleUsingBaseUrl(extensions, moduleName, loader, failedLookupLocations, state);
         }
         else {
-            return tryLoadModuleUsingRootDirs(moduleName, containingDirectory, loader, failedLookupLocations, supportedExtensions, state);
+            return tryLoadModuleUsingRootDirs(extensions, moduleName, containingDirectory, loader, failedLookupLocations, state);
         }
     }
 
-    function tryLoadModuleUsingRootDirs(moduleName: string, containingDirectory: string, loader: ResolutionKindSpecificLoader,
-        failedLookupLocations: string[], supportedExtensions: string[], state: ModuleResolutionState): string {
+    function tryLoadModuleUsingRootDirs(extensions: Extensions, moduleName: string, containingDirectory: string, loader: ResolutionKindSpecificLoader,
+        failedLookupLocations: Push<string>, state: ModuleResolutionState): Resolved | undefined {
 
         if (!state.compilerOptions.rootDirs) {
             return undefined;
@@ -432,7 +593,7 @@ namespace ts {
             if (state.traceEnabled) {
                 trace(state.host, Diagnostics.Loading_0_from_the_root_dir_1_candidate_location_2, suffix, matchedNormalizedPrefix, candidate);
             }
-            const resolvedFileName = loader(candidate, supportedExtensions, failedLookupLocations, !directoryProbablyExists(containingDirectory, state.host), state);
+            const resolvedFileName = loader(extensions, candidate, failedLookupLocations, !directoryProbablyExists(containingDirectory, state.host), state);
             if (resolvedFileName) {
                 return resolvedFileName;
             }
@@ -451,7 +612,7 @@ namespace ts {
                     trace(state.host, Diagnostics.Loading_0_from_the_root_dir_1_candidate_location_2, suffix, rootDir, candidate);
                 }
                 const baseDirectory = getDirectoryPath(candidate);
-                const resolvedFileName = loader(candidate, supportedExtensions, failedLookupLocations, !directoryProbablyExists(baseDirectory, state.host), state);
+                const resolvedFileName = loader(extensions, candidate, failedLookupLocations, !directoryProbablyExists(baseDirectory, state.host), state);
                 if (resolvedFileName) {
                     return resolvedFileName;
                 }
@@ -463,9 +624,7 @@ namespace ts {
         return undefined;
     }
 
-    function tryLoadModuleUsingBaseUrl(moduleName: string, loader: ResolutionKindSpecificLoader, failedLookupLocations: string[],
-        supportedExtensions: string[], state: ModuleResolutionState): string {
-
+    function tryLoadModuleUsingBaseUrl(extensions: Extensions, moduleName: string, loader: ResolutionKindSpecificLoader, failedLookupLocations: Push<string>, state: ModuleResolutionState): Resolved | undefined {
         if (!state.compilerOptions.baseUrl) {
             return undefined;
         }
@@ -488,18 +647,23 @@ namespace ts {
             if (state.traceEnabled) {
                 trace(state.host, Diagnostics.Module_name_0_matched_pattern_1, moduleName, matchedPatternText);
             }
-            for (const subst of state.compilerOptions.paths[matchedPatternText]) {
+            return forEach(state.compilerOptions.paths[matchedPatternText], subst => {
                 const path = matchedStar ? subst.replace("*", matchedStar) : subst;
                 const candidate = normalizePath(combinePaths(state.compilerOptions.baseUrl, path));
                 if (state.traceEnabled) {
                     trace(state.host, Diagnostics.Trying_substitution_0_candidate_module_location_Colon_1, subst, path);
                 }
-                const resolvedFileName = loader(candidate, supportedExtensions, failedLookupLocations, !directoryProbablyExists(getDirectoryPath(candidate), state.host), state);
-                if (resolvedFileName) {
-                    return resolvedFileName;
+                // A path mapping may have an extension, in contrast to an import, which should omit it.
+                const extension = tryGetExtensionFromPath(candidate);
+                if (extension !== undefined) {
+                    const path = tryFile(candidate, failedLookupLocations, /*onlyRecordFailures*/ false, state);
+                    if (path !== undefined) {
+                        return { path, extension };
+                    }
                 }
-            }
-            return undefined;
+
+                return loader(extensions, candidate, failedLookupLocations, !directoryProbablyExists(getDirectoryPath(candidate), state.host), state);
+            });
         }
         else {
             const candidate = normalizePath(combinePaths(state.compilerOptions.baseUrl, moduleName));
@@ -508,56 +672,106 @@ namespace ts {
                 trace(state.host, Diagnostics.Resolving_module_name_0_relative_to_base_url_1_2, moduleName, state.compilerOptions.baseUrl, candidate);
             }
 
-            return loader(candidate, supportedExtensions, failedLookupLocations, !directoryProbablyExists(getDirectoryPath(candidate), state.host), state);
+            return loader(extensions, candidate, failedLookupLocations, !directoryProbablyExists(getDirectoryPath(candidate), state.host), state);
         }
     }
 
-    export function nodeModuleNameResolver(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost): ResolvedModuleWithFailedLookupLocations {
-        const containingDirectory = getDirectoryPath(containingFile);
-        const supportedExtensions = getSupportedExtensions(compilerOptions);
+    export function nodeModuleNameResolver(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost, cache?: ModuleResolutionCache): ResolvedModuleWithFailedLookupLocations {
+        return nodeModuleNameResolverWorker(moduleName, getDirectoryPath(containingFile), compilerOptions, host, cache, /*jsOnly*/ false);
+    }
+
+    /**
+     * Expose resolution logic to allow us to use Node module resolution logic from arbitrary locations.
+     * No way to do this with `require()`: https://github.com/nodejs/node/issues/5963
+     * Throws an error if the module can't be resolved.
+     */
+    /* @internal */
+    export function resolveJavaScriptModule(moduleName: string, initialDir: string, host: ModuleResolutionHost): string {
+        const { resolvedModule, failedLookupLocations } =
+            nodeModuleNameResolverWorker(moduleName, initialDir, { moduleResolution: ts.ModuleResolutionKind.NodeJs, allowJs: true }, host, /*cache*/ undefined, /*jsOnly*/ true);
+        if (!resolvedModule) {
+            throw new Error(`Could not resolve JS module ${moduleName} starting at ${initialDir}. Looked in: ${failedLookupLocations.join(", ")}`);
+        }
+        return resolvedModule.resolvedFileName;
+    }
+
+    function nodeModuleNameResolverWorker(moduleName: string, containingDirectory: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost, cache: ModuleResolutionCache | undefined, jsOnly: boolean): ResolvedModuleWithFailedLookupLocations {
         const traceEnabled = isTraceEnabled(compilerOptions, host);
 
         const failedLookupLocations: string[] = [];
-        const state = { compilerOptions, host, traceEnabled, skipTsx: false };
-        let resolvedFileName = tryLoadModuleUsingOptionalResolutionSettings(moduleName, containingDirectory, nodeLoadModuleByRelativeName,
-            failedLookupLocations, supportedExtensions, state);
+        const state: ModuleResolutionState = { compilerOptions, host, traceEnabled };
+
+        const result = jsOnly ? tryResolve(Extensions.JavaScript) : (tryResolve(Extensions.TypeScript) || tryResolve(Extensions.JavaScript));
+        if (result && result.value) {
+            const { resolved, isExternalLibraryImport } = result.value;
+            return createResolvedModuleWithFailedLookupLocations(resolved, isExternalLibraryImport, failedLookupLocations);
+        }
+        return { resolvedModule: undefined, failedLookupLocations };
+
+        function tryResolve(extensions: Extensions): SearchResult<{ resolved: Resolved, isExternalLibraryImport: boolean }> {
+            const loader: ResolutionKindSpecificLoader = (extensions, candidate, failedLookupLocations, onlyRecordFailures, state) => nodeLoadModuleByRelativeName(extensions, candidate, failedLookupLocations, onlyRecordFailures, state, /*considerPackageJson*/ true);
+            const resolved = tryLoadModuleUsingOptionalResolutionSettings(extensions, moduleName, containingDirectory, loader, failedLookupLocations, state);
+            if (resolved) {
+                return toSearchResult({ resolved, isExternalLibraryImport: false });
+            }
 
-        let isExternalLibraryImport = false;
-        if (!resolvedFileName) {
             if (moduleHasNonRelativeName(moduleName)) {
                 if (traceEnabled) {
-                    trace(host, Diagnostics.Loading_module_0_from_node_modules_folder, moduleName);
+                    trace(host, Diagnostics.Loading_module_0_from_node_modules_folder_target_file_type_1, moduleName, Extensions[extensions]);
                 }
-                resolvedFileName = loadModuleFromNodeModules(moduleName, containingDirectory, failedLookupLocations, state, /*checkOneLevel*/ false);
-                isExternalLibraryImport = resolvedFileName !== undefined;
+                const resolved = loadModuleFromNodeModules(extensions, moduleName, containingDirectory, failedLookupLocations, state, cache);
+                // For node_modules lookups, get the real path so that multiple accesses to an `npm link`-ed module do not create duplicate files.
+                return resolved && { value: resolved.value && { resolved: { path: realpath(resolved.value.path, host, traceEnabled), extension: resolved.value.extension }, isExternalLibraryImport: true } };
             }
             else {
                 const candidate = normalizePath(combinePaths(containingDirectory, moduleName));
-                resolvedFileName = nodeLoadModuleByRelativeName(candidate, supportedExtensions, failedLookupLocations, /*onlyRecordFailures*/ false, state);
+                const resolved = nodeLoadModuleByRelativeName(extensions, candidate, failedLookupLocations, /*onlyRecordFailures*/ false, state, /*considerPackageJson*/ true);
+                return resolved && toSearchResult({ resolved, isExternalLibraryImport: false });
             }
         }
+    }
 
-        if (resolvedFileName && host.realpath) {
-            const originalFileName = resolvedFileName;
-            resolvedFileName = normalizePath(host.realpath(resolvedFileName));
-            if (traceEnabled) {
-                trace(host, Diagnostics.Resolving_real_path_for_0_result_1, originalFileName, resolvedFileName);
-            }
+    function realpath(path: string, host: ModuleResolutionHost, traceEnabled: boolean): string {
+        if (!host.realpath) {
+            return path;
         }
 
-        return createResolvedModule(resolvedFileName, isExternalLibraryImport, failedLookupLocations);
+        const real = normalizePath(host.realpath(path));
+        if (traceEnabled) {
+            trace(host, Diagnostics.Resolving_real_path_for_0_result_1, path, real);
+        }
+        return real;
     }
 
-    function nodeLoadModuleByRelativeName(candidate: string, supportedExtensions: string[], failedLookupLocations: string[],
-        onlyRecordFailures: boolean, state: ModuleResolutionState): string {
-
+    function nodeLoadModuleByRelativeName(extensions: Extensions, candidate: string, failedLookupLocations: Push<string>, onlyRecordFailures: boolean, state: ModuleResolutionState, considerPackageJson: boolean): Resolved | undefined {
         if (state.traceEnabled) {
-            trace(state.host, Diagnostics.Loading_module_as_file_Slash_folder_candidate_module_location_0, candidate);
+            trace(state.host, Diagnostics.Loading_module_as_file_Slash_folder_candidate_module_location_0_target_file_type_1, candidate, Extensions[extensions]);
         }
-
-        const resolvedFileName = !pathEndsWithDirectorySeparator(candidate) && loadModuleFromFile(candidate, supportedExtensions, failedLookupLocations, onlyRecordFailures, state);
-
-        return resolvedFileName || loadNodeModuleFromDirectory(supportedExtensions, candidate, failedLookupLocations, onlyRecordFailures, state);
+        if (!pathEndsWithDirectorySeparator(candidate)) {
+            if (!onlyRecordFailures) {
+                const parentOfCandidate = getDirectoryPath(candidate);
+                if (!directoryProbablyExists(parentOfCandidate, state.host)) {
+                    if (state.traceEnabled) {
+                        trace(state.host, Diagnostics.Directory_0_does_not_exist_skipping_all_lookups_in_it, parentOfCandidate);
+                    }
+                    onlyRecordFailures = true;
+                }
+            }
+            const resolvedFromFile = loadModuleFromFile(extensions, candidate, failedLookupLocations, onlyRecordFailures, state);
+            if (resolvedFromFile) {
+                return resolvedFromFile;
+            }
+        }
+        if (!onlyRecordFailures) {
+            const candidateExists = directoryProbablyExists(candidate, state.host);
+            if (!candidateExists) {
+                if (state.traceEnabled) {
+                    trace(state.host, Diagnostics.Directory_0_does_not_exist_skipping_all_lookups_in_it, candidate);
+                }
+                onlyRecordFailures = true;
+            }
+        }
+        return loadNodeModuleFromDirectory(extensions, candidate, failedLookupLocations, onlyRecordFailures, state, considerPackageJson);
     }
 
     /* @internal */
@@ -570,9 +784,9 @@ namespace ts {
      * @param {boolean} onlyRecordFailures - if true then function won't try to actually load files but instead record all attempts as failures. This flag is necessary
      * in cases when we know upfront that all load attempts will fail (because containing folder does not exists) however we still need to record all failed lookup locations.
      */
-    function loadModuleFromFile(candidate: string, extensions: string[], failedLookupLocation: string[], onlyRecordFailures: boolean, state: ModuleResolutionState): string | undefined {
+    function loadModuleFromFile(extensions: Extensions, candidate: string, failedLookupLocations: Push<string>, onlyRecordFailures: boolean, state: ModuleResolutionState): Resolved | undefined {
         // First, try adding an extension. An import of "foo" could be matched by a file "foo.ts", or "foo.js" by "foo.js.ts"
-        const resolvedByAddingExtension = tryAddingExtensions(candidate, extensions, failedLookupLocation, onlyRecordFailures, state);
+        const resolvedByAddingExtension = tryAddingExtensions(candidate, extensions, failedLookupLocations, onlyRecordFailures, state);
         if (resolvedByAddingExtension) {
             return resolvedByAddingExtension;
         }
@@ -585,12 +799,12 @@ namespace ts {
                 const extension = candidate.substring(extensionless.length);
                 trace(state.host, Diagnostics.File_name_0_has_a_1_extension_stripping_it, candidate, extension);
             }
-            return tryAddingExtensions(extensionless, extensions, failedLookupLocation, onlyRecordFailures, state);
+            return tryAddingExtensions(extensionless, extensions, failedLookupLocations, onlyRecordFailures, state);
         }
     }
 
     /** Try to return an existing file that adds one of the `extensions` to `candidate`. */
-    function tryAddingExtensions(candidate: string, extensions: string[], failedLookupLocation: string[], onlyRecordFailures: boolean, state: ModuleResolutionState): string | undefined {
+    function tryAddingExtensions(candidate: string, extensions: Extensions, failedLookupLocations: Push<string>, onlyRecordFailures: boolean, state: ModuleResolutionState): Resolved | undefined {
         if (!onlyRecordFailures) {
             // check if containing folder exists - if it doesn't then just record failures for all supported extensions without disk probing
             const directory = getDirectoryPath(candidate);
@@ -598,147 +812,296 @@ namespace ts {
                 onlyRecordFailures = !directoryProbablyExists(directory, state.host);
             }
         }
-        return forEach(extensions, ext =>
-            !(state.skipTsx && isJsxOrTsxExtension(ext)) && tryFile(candidate + ext, failedLookupLocation, onlyRecordFailures, state));
+
+        switch (extensions) {
+            case Extensions.DtsOnly:
+                return tryExtension(Extension.Dts);
+            case Extensions.TypeScript:
+                return tryExtension(Extension.Ts) || tryExtension(Extension.Tsx) || tryExtension(Extension.Dts);
+            case Extensions.JavaScript:
+                return tryExtension(Extension.Js) || tryExtension(Extension.Jsx);
+        }
+
+        function tryExtension(extension: Extension): Resolved | undefined {
+            const path = tryFile(candidate + extension, failedLookupLocations, onlyRecordFailures, state);
+            return path && { path, extension };
+        }
     }
 
     /** Return the file if it exists. */
-    function tryFile(fileName: string, failedLookupLocation: string[], onlyRecordFailures: boolean, state: ModuleResolutionState): string | undefined {
-        if (!onlyRecordFailures && state.host.fileExists(fileName)) {
-            if (state.traceEnabled) {
-                trace(state.host, Diagnostics.File_0_exist_use_it_as_a_name_resolution_result, fileName);
+    function tryFile(fileName: string, failedLookupLocations: Push<string>, onlyRecordFailures: boolean, state: ModuleResolutionState): string | undefined {
+        if (!onlyRecordFailures) {
+            if (state.host.fileExists(fileName)) {
+                if (state.traceEnabled) {
+                    trace(state.host, Diagnostics.File_0_exist_use_it_as_a_name_resolution_result, fileName);
+                }
+                return fileName;
             }
-            return fileName;
-        }
-        else {
-            if (state.traceEnabled) {
-                trace(state.host, Diagnostics.File_0_does_not_exist, fileName);
+            else {
+                if (state.traceEnabled) {
+                    trace(state.host, Diagnostics.File_0_does_not_exist, fileName);
+                }
             }
-            failedLookupLocation.push(fileName);
-            return undefined;
         }
+        failedLookupLocations.push(fileName);
+        return undefined;
     }
 
-    function loadNodeModuleFromDirectory(extensions: string[], candidate: string, failedLookupLocation: string[], onlyRecordFailures: boolean, state: ModuleResolutionState): string {
-        const packageJsonPath = pathToPackageJson(candidate);
+    function loadNodeModuleFromDirectory(extensions: Extensions, candidate: string, failedLookupLocations: Push<string>, onlyRecordFailures: boolean, state: ModuleResolutionState, considerPackageJson = true): Resolved | undefined {
         const directoryExists = !onlyRecordFailures && directoryProbablyExists(candidate, state.host);
-        if (directoryExists && state.host.fileExists(packageJsonPath)) {
-            if (state.traceEnabled) {
-                trace(state.host, Diagnostics.Found_package_json_at_0, packageJsonPath);
-            }
-            const typesFile = tryReadTypesSection(packageJsonPath, candidate, state);
-            if (typesFile) {
-                const onlyRecordFailures = !directoryProbablyExists(getDirectoryPath(typesFile), state.host);
-                // A package.json "typings" may specify an exact filename, or may choose to omit an extension.
-                const result = tryFile(typesFile, failedLookupLocation, onlyRecordFailures, state) ||
-                    tryAddingExtensions(typesFile, extensions, failedLookupLocation, onlyRecordFailures, state);
-                if (result) {
-                    return result;
+
+        if (considerPackageJson) {
+            const packageJsonPath = pathToPackageJson(candidate);
+            if (directoryExists && state.host.fileExists(packageJsonPath)) {
+                const fromPackageJson = loadModuleFromPackageJson(packageJsonPath, extensions, candidate, failedLookupLocations, state);
+                if (fromPackageJson) {
+                    return fromPackageJson;
                 }
             }
             else {
-                if (state.traceEnabled) {
-                    trace(state.host, Diagnostics.package_json_does_not_have_types_field);
+                if (directoryExists && state.traceEnabled) {
+                    trace(state.host, Diagnostics.File_0_does_not_exist, packageJsonPath);
                 }
+                // record package json as one of failed lookup locations - in the future if this file will appear it will invalidate resolution results
+                failedLookupLocations.push(packageJsonPath);
             }
         }
-        else {
+
+        return loadModuleFromFile(extensions, combinePaths(candidate, "index"), failedLookupLocations, !directoryExists, state);
+    }
+
+    function loadModuleFromPackageJson(packageJsonPath: string, extensions: Extensions, candidate: string, failedLookupLocations: Push<string>, state: ModuleResolutionState): Resolved | undefined {
+        if (state.traceEnabled) {
+            trace(state.host, Diagnostics.Found_package_json_at_0, packageJsonPath);
+        }
+
+        const file = tryReadPackageJsonFields(extensions !== Extensions.JavaScript, packageJsonPath, candidate, state);
+        if (!file) {
+            return undefined;
+        }
+
+        const onlyRecordFailures = !directoryProbablyExists(getDirectoryPath(file), state.host);
+        const fromFile = tryFile(file, failedLookupLocations, onlyRecordFailures, state);
+        if (fromFile) {
+            const resolved = fromFile && resolvedIfExtensionMatches(extensions, fromFile);
+            if (resolved) {
+                return resolved;
+            }
             if (state.traceEnabled) {
-                trace(state.host, Diagnostics.File_0_does_not_exist, packageJsonPath);
+                trace(state.host, Diagnostics.File_0_has_an_unsupported_extension_so_skipping_it, fromFile);
             }
-            // record package json as one of failed lookup locations - in the future if this file will appear it will invalidate resolution results
-            failedLookupLocation.push(packageJsonPath);
         }
 
-        return loadModuleFromFile(combinePaths(candidate, "index"), extensions, failedLookupLocation, !directoryExists, state);
+        // Even if extensions is DtsOnly, we can still look up a .ts file as a result of package.json "types"
+        const nextExtensions = extensions === Extensions.DtsOnly ? Extensions.TypeScript : extensions;
+        // Don't do package.json lookup recursively, because Node.js' package lookup doesn't.
+        return nodeLoadModuleByRelativeName(nextExtensions, file, failedLookupLocations, onlyRecordFailures, state, /*considerPackageJson*/ false);
+    }
+
+    /** Resolve from an arbitrarily specified file. Return `undefined` if it has an unsupported extension. */
+    function resolvedIfExtensionMatches(extensions: Extensions, path: string): Resolved | undefined {
+        const extension = tryGetExtensionFromPath(path);
+        return extension !== undefined && extensionIsOk(extensions, extension) ? { path, extension } : undefined;
+    }
+
+    /** True if `extension` is one of the supported `extensions`. */
+    function extensionIsOk(extensions: Extensions, extension: Extension): boolean {
+        switch (extensions) {
+            case Extensions.JavaScript:
+                return extension === Extension.Js || extension === Extension.Jsx;
+            case Extensions.TypeScript:
+                return extension === Extension.Ts || extension === Extension.Tsx || extension === Extension.Dts;
+            case Extensions.DtsOnly:
+                return extension === Extension.Dts;
+        }
     }
 
     function pathToPackageJson(directory: string): string {
         return combinePaths(directory, "package.json");
     }
 
-    function loadModuleFromNodeModulesFolder(moduleName: string, directory: string, failedLookupLocations: string[], state: ModuleResolutionState): string {
+    function loadModuleFromNodeModulesFolder(extensions: Extensions, moduleName: string, nodeModulesFolder: string, nodeModulesFolderExists: boolean, failedLookupLocations: Push<string>, state: ModuleResolutionState): Resolved | undefined {
+        const candidate = normalizePath(combinePaths(nodeModulesFolder, moduleName));
+
+        return loadModuleFromFile(extensions, candidate, failedLookupLocations, !nodeModulesFolderExists, state) ||
+            loadNodeModuleFromDirectory(extensions, candidate, failedLookupLocations, !nodeModulesFolderExists, state);
+    }
+
+    function loadModuleFromNodeModules(extensions: Extensions, moduleName: string, directory: string, failedLookupLocations: Push<string>, state: ModuleResolutionState, cache: NonRelativeModuleNameResolutionCache): SearchResult<Resolved> {
+        return loadModuleFromNodeModulesWorker(extensions, moduleName, directory, failedLookupLocations, state, /*typesOnly*/ false, cache);
+    }
+    function loadModuleFromNodeModulesAtTypes(moduleName: string, directory: string, failedLookupLocations: Push<string>, state: ModuleResolutionState): SearchResult<Resolved> {
+        // Extensions parameter here doesn't actually matter, because typesOnly ensures we're just doing @types lookup, which is always DtsOnly.
+        return loadModuleFromNodeModulesWorker(Extensions.DtsOnly, moduleName, directory, failedLookupLocations, state, /*typesOnly*/ true, /*cache*/ undefined);
+    }
+
+    function loadModuleFromNodeModulesWorker(extensions: Extensions, moduleName: string, directory: string, failedLookupLocations: Push<string>, state: ModuleResolutionState, typesOnly: boolean, cache: NonRelativeModuleNameResolutionCache): SearchResult<Resolved> {
+        const perModuleNameCache = cache && cache.getOrCreateCacheForModuleName(moduleName);
+        return forEachAncestorDirectory(normalizeSlashes(directory), ancestorDirectory => {
+            if (getBaseFileName(ancestorDirectory) !== "node_modules") {
+                const resolutionFromCache = tryFindNonRelativeModuleNameInCache(perModuleNameCache, moduleName, ancestorDirectory, state.traceEnabled, state.host);
+                if (resolutionFromCache) {
+                    return resolutionFromCache;
+                }
+                return toSearchResult(loadModuleFromNodeModulesOneLevel(extensions, moduleName, ancestorDirectory, failedLookupLocations, state, typesOnly));
+            }
+        });
+    }
+
+    /** Load a module from a single node_modules directory, but not from any ancestors' node_modules directories. */
+    function loadModuleFromNodeModulesOneLevel(extensions: Extensions, moduleName: string, directory: string, failedLookupLocations: Push<string>, state: ModuleResolutionState, typesOnly = false): Resolved | undefined {
         const nodeModulesFolder = combinePaths(directory, "node_modules");
         const nodeModulesFolderExists = directoryProbablyExists(nodeModulesFolder, state.host);
-        const candidate = normalizePath(combinePaths(nodeModulesFolder, moduleName));
-        const supportedExtensions = getSupportedExtensions(state.compilerOptions);
+        if (!nodeModulesFolderExists && state.traceEnabled) {
+            trace(state.host, Diagnostics.Directory_0_does_not_exist_skipping_all_lookups_in_it, nodeModulesFolder);
+        }
 
-        let result = loadModuleFromFile(candidate, supportedExtensions, failedLookupLocations, !nodeModulesFolderExists, state);
-        if (result) {
-            return result;
+        const packageResult = typesOnly ? undefined : loadModuleFromNodeModulesFolder(extensions, moduleName, nodeModulesFolder, nodeModulesFolderExists, failedLookupLocations, state);
+        if (packageResult) {
+            return packageResult;
         }
-        result = loadNodeModuleFromDirectory(supportedExtensions, candidate, failedLookupLocations, !nodeModulesFolderExists, state);
-        if (result) {
-            return result;
+        if (extensions !== Extensions.JavaScript) {
+            const nodeModulesAtTypes = combinePaths(nodeModulesFolder, "@types");
+            let nodeModulesAtTypesExists = nodeModulesFolderExists;
+            if (nodeModulesFolderExists && !directoryProbablyExists(nodeModulesAtTypes, state.host)) {
+                if (state.traceEnabled) {
+                    trace(state.host, Diagnostics.Directory_0_does_not_exist_skipping_all_lookups_in_it, nodeModulesAtTypes);
+                }
+                nodeModulesAtTypesExists = false;
+            }
+            return loadModuleFromNodeModulesFolder(Extensions.DtsOnly, mangleScopedPackage(moduleName, state), nodeModulesAtTypes, nodeModulesAtTypesExists, failedLookupLocations, state);
         }
     }
 
-    /* @internal */
-    export function loadModuleFromNodeModules(moduleName: string, directory: string, failedLookupLocations: string[], state: ModuleResolutionState, checkOneLevel: boolean): string {
-        directory = normalizeSlashes(directory);
-        while (true) {
-            const baseName = getBaseFileName(directory);
-            if (baseName !== "node_modules") {
-                // Try to load source from the package
-                const packageResult = loadModuleFromNodeModulesFolder(moduleName, directory, failedLookupLocations, state);
-                if (packageResult && hasTypeScriptFileExtension(packageResult)) {
-                    // Always prefer a TypeScript (.ts, .tsx, .d.ts) file shipped with the package
-                    return packageResult;
-                }
-                else {
-                    // Else prefer a types package over non-TypeScript results (e.g. JavaScript files)
-                    const typesResult = loadModuleFromNodeModulesFolder(combinePaths("@types", moduleName), directory, failedLookupLocations, state);
-                    if (typesResult || packageResult) {
-                        return typesResult || packageResult;
-                    }
+    /** Double underscores are used in DefinitelyTyped to delimit scoped packages. */
+    const mangledScopedPackageSeparator = "__";
+
+    /** For a scoped package, we must look in `@types/foo__bar` instead of `@types/@foo/bar`. */
+    function mangleScopedPackage(moduleName: string, state: ModuleResolutionState): string {
+        if (startsWith(moduleName, "@")) {
+            const replaceSlash = moduleName.replace(ts.directorySeparator, mangledScopedPackageSeparator);
+            if (replaceSlash !== moduleName) {
+                const mangled = replaceSlash.slice(1); // Take off the "@"
+                if (state.traceEnabled) {
+                    trace(state.host, Diagnostics.Scoped_package_detected_looking_in_0, mangled);
                 }
+                return mangled;
             }
+        }
+        return moduleName;
+    }
 
-            const parentPath = getDirectoryPath(directory);
-            if (parentPath === directory || checkOneLevel) {
-                break;
-            }
+    /* @internal */
+    export function getPackageNameFromAtTypesDirectory(mangledName: string): string {
+        const withoutAtTypePrefix = removePrefix(mangledName, "@types/");
+        if (withoutAtTypePrefix !== mangledName) {
+            return withoutAtTypePrefix.indexOf("__") !== -1 ?
+                "@" + withoutAtTypePrefix.replace(mangledScopedPackageSeparator, ts.directorySeparator) :
+                withoutAtTypePrefix;
+        }
+        return mangledName;
+    }
 
-            directory = parentPath;
+    function tryFindNonRelativeModuleNameInCache(cache: PerModuleNameCache | undefined, moduleName: string, containingDirectory: string, traceEnabled: boolean, host: ModuleResolutionHost): SearchResult<Resolved> {
+        const result = cache && cache.get(containingDirectory);
+        if (result) {
+            if (traceEnabled) {
+                trace(host, Diagnostics.Resolution_for_module_0_was_found_in_cache, moduleName);
+            }
+            return { value: result.resolvedModule && { path: result.resolvedModule.resolvedFileName, extension: result.resolvedModule.extension } };
         }
-        return undefined;
     }
 
-    export function classicNameResolver(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost): ResolvedModuleWithFailedLookupLocations {
+    export function classicNameResolver(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost, cache?: NonRelativeModuleNameResolutionCache): ResolvedModuleWithFailedLookupLocations {
         const traceEnabled = isTraceEnabled(compilerOptions, host);
-        const state = { compilerOptions, host, traceEnabled, skipTsx: !compilerOptions.jsx };
+        const state: ModuleResolutionState = { compilerOptions, host, traceEnabled };
         const failedLookupLocations: string[] = [];
-        const supportedExtensions = getSupportedExtensions(compilerOptions);
-        let containingDirectory = getDirectoryPath(containingFile);
+        const containingDirectory = getDirectoryPath(containingFile);
 
-        const resolvedFileName = tryLoadModuleUsingOptionalResolutionSettings(moduleName, containingDirectory, loadModuleFromFile, failedLookupLocations, supportedExtensions, state);
-        if (resolvedFileName) {
-            return createResolvedModule(resolvedFileName, /*isExternalLibraryImport*/false, failedLookupLocations);
-        }
+        const resolved = tryResolve(Extensions.TypeScript) || tryResolve(Extensions.JavaScript);
+        return createResolvedModuleWithFailedLookupLocations(resolved && resolved.value, /*isExternalLibraryImport*/ false, failedLookupLocations);
 
-        let referencedSourceFile: string;
-        if (moduleHasNonRelativeName(moduleName)) {
-            while (true) {
-                const searchName = normalizePath(combinePaths(containingDirectory, moduleName));
-                referencedSourceFile = loadModuleFromFile(searchName, supportedExtensions, failedLookupLocations, /*onlyRecordFailures*/ false, state);
-                if (referencedSourceFile) {
-                    break;
+        function tryResolve(extensions: Extensions): SearchResult<Resolved> {
+            const resolvedUsingSettings = tryLoadModuleUsingOptionalResolutionSettings(extensions, moduleName, containingDirectory, loadModuleFromFile, failedLookupLocations, state);
+            if (resolvedUsingSettings) {
+                return { value: resolvedUsingSettings };
+            }
+            const perModuleNameCache = cache && cache.getOrCreateCacheForModuleName(moduleName);
+
+            if (moduleHasNonRelativeName(moduleName)) {
+                // Climb up parent directories looking for a module.
+                const resolved = forEachAncestorDirectory(containingDirectory, directory => {
+                    const resolutionFromCache = tryFindNonRelativeModuleNameInCache(perModuleNameCache, moduleName, directory, traceEnabled, host);
+                    if (resolutionFromCache) {
+                        return resolutionFromCache;
+                    }
+                    const searchName = normalizePath(combinePaths(directory, moduleName));
+                    return toSearchResult(loadModuleFromFile(extensions, searchName, failedLookupLocations, /*onlyRecordFailures*/ false, state));
+                });
+                if (resolved) {
+                    return resolved;
                 }
-                const parentPath = getDirectoryPath(containingDirectory);
-                if (parentPath === containingDirectory) {
-                    break;
+                if (extensions === Extensions.TypeScript) {
+                    // If we didn't find the file normally, look it up in @types.
+                    return loadModuleFromNodeModulesAtTypes(moduleName, containingDirectory, failedLookupLocations, state);
                 }
-                containingDirectory = parentPath;
+            }
+            else {
+                const candidate = normalizePath(combinePaths(containingDirectory, moduleName));
+                return toSearchResult(loadModuleFromFile(extensions, candidate, failedLookupLocations, /*onlyRecordFailures*/ false, state));
             }
         }
-        else {
-            const candidate = normalizePath(combinePaths(containingDirectory, moduleName));
-            referencedSourceFile = loadModuleFromFile(candidate, supportedExtensions, failedLookupLocations, /*onlyRecordFailures*/ false, state);
+    }
+
+    /**
+     * LSHost may load a module from a global cache of typings.
+     * This is the minumum code needed to expose that functionality; the rest is in LSHost.
+     */
+    /* @internal */
+    export function loadModuleFromGlobalCache(moduleName: string, projectName: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost, globalCache: string): ResolvedModuleWithFailedLookupLocations {
+        const traceEnabled = isTraceEnabled(compilerOptions, host);
+        if (traceEnabled) {
+            trace(host, Diagnostics.Auto_discovery_for_typings_is_enabled_in_project_0_Running_extra_resolution_pass_for_module_1_using_cache_location_2, projectName, moduleName, globalCache);
         }
+        const state: ModuleResolutionState = { compilerOptions, host, traceEnabled };
+        const failedLookupLocations: string[] = [];
+        const resolved = loadModuleFromNodeModulesOneLevel(Extensions.DtsOnly, moduleName, globalCache, failedLookupLocations, state);
+        return createResolvedModuleWithFailedLookupLocations(resolved, /*isExternalLibraryImport*/ true, failedLookupLocations);
+    }
 
+    /**
+     * Represents result of search. Normally when searching among several alternatives we treat value `undefined` as indicator
+     * that search fails and we should try another option.
+     * However this does not allow us to represent final result that should be used instead of further searching (i.e. a final result that was found in cache).
+     * SearchResult is used to deal with this issue, its values represents following outcomes:
+     * - undefined - not found, continue searching
+     * - { value: undefined } - not found - stop searching
+     * - { value: <some-value> } - found - stop searching
+     */
+    type SearchResult<T> = { value: T | undefined } | undefined;
+
+    /**
+     * Wraps value to SearchResult.
+     * @returns undefined if value is undefined or { value } otherwise
+     */
+    function toSearchResult<T>(value: T | undefined): SearchResult<T> {
+        return value !== undefined ? { value } : undefined;
+    }
 
-        return referencedSourceFile
-            ? { resolvedModule: { resolvedFileName: referencedSourceFile }, failedLookupLocations }
-            : { resolvedModule: undefined, failedLookupLocations };
+    /** Calls `callback` on `directory` and every ancestor directory it has, returning the first defined result. */
+    function forEachAncestorDirectory<T>(directory: string, callback: (directory: string) => SearchResult<T>): SearchResult<T> {
+        while (true) {
+            const result = callback(directory);
+            if (result !== undefined) {
+                return result;
+            }
+
+            const parentPath = getDirectoryPath(directory);
+            if (parentPath === directory) {
+                return undefined;
+            }
+
+            directory = parentPath;
+        }
     }
-}
\ No newline at end of file
+}
diff --git a/src/compiler/parser.ts b/src/compiler/parser.ts
index 9bd9311..0f08d67 100644
--- a/src/compiler/parser.ts
+++ b/src/compiler/parser.ts
@@ -1,6 +1,5 @@
 /// <reference path="utilities.ts"/>
 /// <reference path="scanner.ts"/>
-/// <reference path="factory.ts"/>
 
 namespace ts {
     let NodeConstructor: new (kind: SyntaxKind, pos: number, end: number) => Node;
@@ -15,7 +14,7 @@ namespace ts {
         else if (kind === SyntaxKind.Identifier) {
             return new (IdentifierConstructor || (IdentifierConstructor = objectAllocator.getIdentifierConstructor()))(kind, pos, end);
         }
-        else if (kind < SyntaxKind.FirstNode) {
+        else if (!isNodeKind(kind)) {
             return new (TokenConstructor || (TokenConstructor = objectAllocator.getTokenConstructor()))(kind, pos, end);
         }
         else {
@@ -23,19 +22,19 @@ namespace ts {
         }
     }
 
-    function visitNode<T>(cbNode: (node: Node) => T, node: Node): T {
+    function visitNode<T>(cbNode: (node: Node) => T, node?: Node): T | undefined {
         if (node) {
             return cbNode(node);
         }
     }
 
-    function visitNodeArray<T>(cbNodes: (nodes: Node[]) => T, nodes: Node[]) {
+    function visitNodeArray<T>(cbNodes: (nodes: Node[]) => T, nodes?: Node[]): T | undefined {
         if (nodes) {
             return cbNodes(nodes);
         }
     }
 
-    function visitEachNode<T>(cbNode: (node: Node) => T, nodes: Node[]) {
+    function visitEachNode<T>(cbNode: (node: Node) => T, nodes?: Node[]): T | undefined {
         if (nodes) {
             for (const node of nodes) {
                 const result = cbNode(node);
@@ -46,18 +45,24 @@ namespace ts {
         }
     }
 
-    // Invokes a callback for each child of the given node. The 'cbNode' callback is invoked for all child nodes
-    // stored in properties. If a 'cbNodes' callback is specified, it is invoked for embedded arrays; otherwise,
-    // embedded arrays are flattened and the 'cbNode' callback is invoked for each element. If a callback returns
-    // a truthy value, iteration stops and that value is returned. Otherwise, undefined is returned.
-    export function forEachChild<T>(node: Node, cbNode: (node: Node) => T, cbNodeArray?: (nodes: Node[]) => T): T {
+    /**
+     * Invokes a callback for each child of the given node. The 'cbNode' callback is invoked for all child nodes
+     * stored in properties. If a 'cbNodes' callback is specified, it is invoked for embedded arrays; otherwise,
+     * embedded arrays are flattened and the 'cbNode' callback is invoked for each element. If a callback returns
+     * a truthy value, iteration stops and that value is returned. Otherwise, undefined is returned.
+     *
+     * @param node a given node to visit its children
+     * @param cbNode a callback to be invoked for all child nodes
+     * @param cbNodeArray a callback to be invoked for embedded array
+     */
+    export function forEachChild<T>(node: Node, cbNode: (node: Node) => T | undefined, cbNodeArray?: (nodes: NodeArray<Node>) => T | undefined): T | undefined {
         if (!node) {
             return;
         }
         // The visitXXX functions could be written as local functions that close over the cbNode and cbNodeArray
         // callback parameters, but that causes a closure allocation for each invocation with noticeable effects
         // on performance.
-        const visitNodes: (cb: (node: Node | Node[]) => T, nodes: Node[]) => T = cbNodeArray ? visitNodeArray : visitEachNode;
+        const visitNodes: (cb: ((node?: Node) => T | undefined) | ((node?: Node[]) => T | undefined), nodes?: Node[]) => T | undefined = cbNodeArray ? visitNodeArray : visitEachNode;
         const cbNodes = cbNodeArray || cbNode;
         switch (node.kind) {
             case SyntaxKind.QualifiedName:
@@ -66,6 +71,7 @@ namespace ts {
             case SyntaxKind.TypeParameter:
                 return visitNode(cbNode, (<TypeParameterDeclaration>node).name) ||
                     visitNode(cbNode, (<TypeParameterDeclaration>node).constraint) ||
+                    visitNode(cbNode, (<TypeParameterDeclaration>node).default) ||
                     visitNode(cbNode, (<TypeParameterDeclaration>node).expression);
             case SyntaxKind.ShorthandPropertyAssignment:
                 return visitNodes(cbNodes, node.decorators) ||
@@ -74,6 +80,8 @@ namespace ts {
                     visitNode(cbNode, (<ShorthandPropertyAssignment>node).questionToken) ||
                     visitNode(cbNode, (<ShorthandPropertyAssignment>node).equalsToken) ||
                     visitNode(cbNode, (<ShorthandPropertyAssignment>node).objectAssignmentInitializer);
+            case SyntaxKind.SpreadAssignment:
+                return visitNode(cbNode, (<SpreadAssignment>node).expression);
             case SyntaxKind.Parameter:
             case SyntaxKind.PropertyDeclaration:
             case SyntaxKind.PropertySignature:
@@ -134,7 +142,16 @@ namespace ts {
             case SyntaxKind.IntersectionType:
                 return visitNodes(cbNodes, (<UnionOrIntersectionTypeNode>node).types);
             case SyntaxKind.ParenthesizedType:
-                return visitNode(cbNode, (<ParenthesizedTypeNode>node).type);
+            case SyntaxKind.TypeOperator:
+                return visitNode(cbNode, (<ParenthesizedTypeNode | TypeOperatorNode>node).type);
+            case SyntaxKind.IndexedAccessType:
+                return visitNode(cbNode, (<IndexedAccessTypeNode>node).objectType) ||
+                    visitNode(cbNode, (<IndexedAccessTypeNode>node).indexType);
+            case SyntaxKind.MappedType:
+                return visitNode(cbNode, (<MappedTypeNode>node).readonlyToken) ||
+                    visitNode(cbNode, (<MappedTypeNode>node).typeParameter) ||
+                    visitNode(cbNode, (<MappedTypeNode>node).questionToken) ||
+                    visitNode(cbNode, (<MappedTypeNode>node).type);
             case SyntaxKind.LiteralType:
                 return visitNode(cbNode, (<LiteralTypeNode>node).literal);
             case SyntaxKind.ObjectBindingPattern:
@@ -187,14 +204,16 @@ namespace ts {
                     visitNode(cbNode, (<AsExpression>node).type);
             case SyntaxKind.NonNullExpression:
                 return visitNode(cbNode, (<NonNullExpression>node).expression);
+            case SyntaxKind.MetaProperty:
+                return visitNode(cbNode, (<MetaProperty>node).name);
             case SyntaxKind.ConditionalExpression:
                 return visitNode(cbNode, (<ConditionalExpression>node).condition) ||
                     visitNode(cbNode, (<ConditionalExpression>node).questionToken) ||
                     visitNode(cbNode, (<ConditionalExpression>node).whenTrue) ||
                     visitNode(cbNode, (<ConditionalExpression>node).colonToken) ||
                     visitNode(cbNode, (<ConditionalExpression>node).whenFalse);
-            case SyntaxKind.SpreadElementExpression:
-                return visitNode(cbNode, (<SpreadElementExpression>node).expression);
+            case SyntaxKind.SpreadElement:
+                return visitNode(cbNode, (<SpreadElement>node).expression);
             case SyntaxKind.Block:
             case SyntaxKind.ModuleBlock:
                 return visitNodes(cbNodes, (<Block>node).statements);
@@ -229,7 +248,8 @@ namespace ts {
                     visitNode(cbNode, (<ForInStatement>node).expression) ||
                     visitNode(cbNode, (<ForInStatement>node).statement);
             case SyntaxKind.ForOfStatement:
-                return visitNode(cbNode, (<ForOfStatement>node).initializer) ||
+                return visitNode(cbNode, (<ForOfStatement>node).awaitModifier) ||
+                    visitNode(cbNode, (<ForOfStatement>node).initializer) ||
                     visitNode(cbNode, (<ForOfStatement>node).expression) ||
                     visitNode(cbNode, (<ForOfStatement>node).statement);
             case SyntaxKind.ContinueStatement:
@@ -347,6 +367,8 @@ namespace ts {
                 return visitNode(cbNode, (<ExternalModuleReference>node).expression);
             case SyntaxKind.MissingDeclaration:
                 return visitNodes(cbNodes, node.decorators);
+            case SyntaxKind.CommaListExpression:
+                return visitNodes(cbNodes, (<CommaListExpression>node).elements);
 
             case SyntaxKind.JsxElement:
                 return visitNode(cbNode, (<JsxElement>node).openingElement) ||
@@ -355,14 +377,17 @@ namespace ts {
             case SyntaxKind.JsxSelfClosingElement:
             case SyntaxKind.JsxOpeningElement:
                 return visitNode(cbNode, (<JsxOpeningLikeElement>node).tagName) ||
-                    visitNodes(cbNodes, (<JsxOpeningLikeElement>node).attributes);
+                    visitNode(cbNode, (<JsxOpeningLikeElement>node).attributes);
+            case SyntaxKind.JsxAttributes:
+                return visitNodes(cbNodes, (<JsxAttributes>node).properties);
             case SyntaxKind.JsxAttribute:
                 return visitNode(cbNode, (<JsxAttribute>node).name) ||
                     visitNode(cbNode, (<JsxAttribute>node).initializer);
             case SyntaxKind.JsxSpreadAttribute:
                 return visitNode(cbNode, (<JsxSpreadAttribute>node).expression);
             case SyntaxKind.JsxExpression:
-                return visitNode(cbNode, (<JsxExpression>node).expression);
+                return visitNode(cbNode, (node as JsxExpression).dotDotDotToken) ||
+                    visitNode(cbNode, (node as JsxExpression).expression);
             case SyntaxKind.JsxClosingElement:
                 return visitNode(cbNode, (<JsxClosingElement>node).tagName);
 
@@ -407,10 +432,13 @@ namespace ts {
                 return visitNode(cbNode, (<JSDocReturnTag>node).typeExpression);
             case SyntaxKind.JSDocTypeTag:
                 return visitNode(cbNode, (<JSDocTypeTag>node).typeExpression);
+            case SyntaxKind.JSDocAugmentsTag:
+                return visitNode(cbNode, (<JSDocAugmentsTag>node).typeExpression);
             case SyntaxKind.JSDocTemplateTag:
                 return visitNodes(cbNodes, (<JSDocTemplateTag>node).typeParameters);
             case SyntaxKind.JSDocTypedefTag:
                 return visitNode(cbNode, (<JSDocTypedefTag>node).typeExpression) ||
+                    visitNode(cbNode, (<JSDocTypedefTag>node).fullName) ||
                     visitNode(cbNode, (<JSDocTypedefTag>node).name) ||
                     visitNode(cbNode, (<JSDocTypedefTag>node).jsDocTypeLiteral);
             case SyntaxKind.JSDocTypeLiteral:
@@ -433,6 +461,20 @@ namespace ts {
         return result;
     }
 
+    export function parseIsolatedEntityName(text: string, languageVersion: ScriptTarget): EntityName {
+        return Parser.parseIsolatedEntityName(text, languageVersion);
+    }
+
+    /**
+     * Parse json text into SyntaxTree and return node and parse errors if any
+     * @param fileName
+     * @param sourceText
+     */
+    export function parseJsonText(fileName: string, sourceText: string): JsonSourceFile {
+        return Parser.parseJsonText(fileName, sourceText);
+    }
+
+    // See also `isExternalOrCommonJsModule` in utilities.ts
     export function isExternalModule(file: SourceFile): boolean {
         return file.externalModuleIndicator !== undefined;
     }
@@ -447,7 +489,11 @@ namespace ts {
     // becoming detached from any SourceFile).  It is recommended that this SourceFile not
     // be used once 'update' is called on it.
     export function updateSourceFile(sourceFile: SourceFile, newText: string, textChangeRange: TextChangeRange, aggressiveChecks?: boolean): SourceFile {
-        return IncrementalParser.updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks);
+        const newSourceFile = IncrementalParser.updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks);
+        // Because new source file node is created, it may not have the flag PossiblyContainDynamicImport. This is the case if there is no new edit to add dynamic import.
+        // We will manually port the flag to the new source file.
+        newSourceFile.flags |= (sourceFile.flags & NodeFlags.PossiblyContainsDynamicImport);
+        return newSourceFile;
     }
 
     /* @internal */
@@ -572,10 +618,10 @@ namespace ts {
         // attached to the EOF token.
         let parseErrorBeforeNextFinishedNode = false;
 
-        export function parseSourceFile(fileName: string, _sourceText: string, languageVersion: ScriptTarget, _syntaxCursor: IncrementalParser.SyntaxCursor, setParentNodes?: boolean, scriptKind?: ScriptKind): SourceFile {
+        export function parseSourceFile(fileName: string, sourceText: string, languageVersion: ScriptTarget, syntaxCursor: IncrementalParser.SyntaxCursor, setParentNodes?: boolean, scriptKind?: ScriptKind): SourceFile {
             scriptKind = ensureScriptKind(fileName, scriptKind);
 
-            initializeState(fileName, _sourceText, languageVersion, _syntaxCursor, scriptKind);
+            initializeState(sourceText, languageVersion, syntaxCursor, scriptKind);
 
             const result = parseSourceFileWorker(fileName, languageVersion, setParentNodes, scriptKind);
 
@@ -584,12 +630,47 @@ namespace ts {
             return result;
         }
 
+        export function parseIsolatedEntityName(content: string, languageVersion: ScriptTarget): EntityName {
+            initializeState(content, languageVersion, /*syntaxCursor*/ undefined, ScriptKind.JS);
+            // Prime the scanner.
+            nextToken();
+            const entityName = parseEntityName(/*allowReservedWords*/ true);
+            const isInvalid = token() === SyntaxKind.EndOfFileToken && !parseDiagnostics.length;
+            clearState();
+            return isInvalid ? entityName : undefined;
+        }
+
+        export function parseJsonText(fileName: string, sourceText: string): JsonSourceFile {
+            initializeState(sourceText, ScriptTarget.ES2015, /*syntaxCursor*/ undefined, ScriptKind.JSON);
+            // Set source file so that errors will be reported with this file name
+            sourceFile = createSourceFile(fileName, ScriptTarget.ES2015, ScriptKind.JSON);
+            const result = <JsonSourceFile>sourceFile;
+
+            // Prime the scanner.
+            nextToken();
+            if (token() === SyntaxKind.EndOfFileToken) {
+                sourceFile.endOfFileToken = <EndOfFileToken>parseTokenNode();
+            }
+            else if (token() === SyntaxKind.OpenBraceToken ||
+                lookAhead(() => token() === SyntaxKind.StringLiteral)) {
+                result.jsonObject = parseObjectLiteralExpression();
+                sourceFile.endOfFileToken = parseExpectedToken(SyntaxKind.EndOfFileToken, /*reportAtCurrentPosition*/ false, Diagnostics.Unexpected_token);
+            }
+            else {
+                parseExpected(SyntaxKind.OpenBraceToken);
+            }
+
+            sourceFile.parseDiagnostics = parseDiagnostics;
+            clearState();
+            return result;
+        }
+
         function getLanguageVariant(scriptKind: ScriptKind) {
             // .tsx and .jsx files are treated as jsx language variant.
-            return scriptKind === ScriptKind.TSX || scriptKind === ScriptKind.JSX || scriptKind === ScriptKind.JS ? LanguageVariant.JSX : LanguageVariant.Standard;
+            return scriptKind === ScriptKind.TSX || scriptKind === ScriptKind.JSX || scriptKind === ScriptKind.JS  || scriptKind === ScriptKind.JSON ? LanguageVariant.JSX : LanguageVariant.Standard;
         }
 
-        function initializeState(fileName: string, _sourceText: string, languageVersion: ScriptTarget, _syntaxCursor: IncrementalParser.SyntaxCursor, scriptKind: ScriptKind) {
+        function initializeState(_sourceText: string, languageVersion: ScriptTarget, _syntaxCursor: IncrementalParser.SyntaxCursor, scriptKind: ScriptKind) {
             NodeConstructor = objectAllocator.getNodeConstructor();
             TokenConstructor = objectAllocator.getTokenConstructor();
             IdentifierConstructor = objectAllocator.getIdentifierConstructor();
@@ -604,7 +685,7 @@ namespace ts {
             identifierCount = 0;
             nodeCount = 0;
 
-            contextFlags = scriptKind === ScriptKind.JS || scriptKind === ScriptKind.JSX ? NodeFlags.JavaScriptFile : NodeFlags.None;
+            contextFlags = scriptKind === ScriptKind.JS || scriptKind === ScriptKind.JSX || scriptKind === ScriptKind.JSON ? NodeFlags.JavaScriptFile : NodeFlags.None;
             parseErrorBeforeNextFinishedNode = false;
 
             // Initialize and prime the scanner before parsing the source elements.
@@ -637,7 +718,7 @@ namespace ts {
 
             sourceFile.statements = parseList(ParsingContext.SourceElements, parseStatement);
             Debug.assert(token() === SyntaxKind.EndOfFileToken);
-            sourceFile.endOfFileToken = parseTokenNode();
+            sourceFile.endOfFileToken = addJSDocComment(parseTokenNode() as EndOfFileToken);
 
             setExternalModuleIndicator(sourceFile);
 
@@ -655,7 +736,7 @@ namespace ts {
 
 
         function addJSDocComment<T extends Node>(node: T): T {
-            const comments = getJsDocCommentsFromText(node, sourceFile.text);
+            const comments = getJSDocCommentRanges(node, sourceFile.text);
             if (comments) {
                 for (const comment of comments) {
                     const jsDoc = JSDocParser.parseJSDocComment(node, comment.pos, comment.end - comment.pos);
@@ -663,10 +744,10 @@ namespace ts {
                         continue;
                     }
 
-                    if (!node.jsDocComments) {
-                        node.jsDocComments = [];
+                    if (!node.jsDoc) {
+                        node.jsDoc = [];
                     }
-                    node.jsDocComments.push(jsDoc);
+                    node.jsDoc.push(jsDoc);
                 }
             }
 
@@ -693,11 +774,11 @@ namespace ts {
                     const saveParent = parent;
                     parent = n;
                     forEachChild(n, visitNode);
-                    if (n.jsDocComments) {
-                        for (const jsDocComment of n.jsDocComments) {
-                            jsDocComment.parent = n;
-                            parent = jsDocComment;
-                            forEachChild(jsDocComment, visitNode);
+                    if (n.jsDoc) {
+                        for (const jsDoc of n.jsDoc) {
+                            jsDoc.parent = n;
+                            parent = jsDoc;
+                            forEachChild(jsDoc, visitNode);
                         }
                     }
                     parent = saveParent;
@@ -716,7 +797,7 @@ namespace ts {
             sourceFile.languageVersion = languageVersion;
             sourceFile.fileName = normalizePath(fileName);
             sourceFile.languageVariant = getLanguageVariant(scriptKind);
-            sourceFile.isDeclarationFile = fileExtensionIs(sourceFile.fileName, ".d.ts");
+            sourceFile.isDeclarationFile = fileExtensionIs(sourceFile.fileName, Extension.Dts);
             sourceFile.scriptKind = scriptKind;
 
             return sourceFile;
@@ -1004,6 +1085,7 @@ namespace ts {
             return false;
         }
 
+        function parseOptionalToken<TKind extends SyntaxKind>(t: TKind): Token<TKind>;
         function parseOptionalToken(t: SyntaxKind): Node {
             if (token() === t) {
                 return parseTokenNode();
@@ -1011,6 +1093,7 @@ namespace ts {
             return undefined;
         }
 
+        function parseExpectedToken<TKind extends SyntaxKind>(t: TKind, reportAtCurrentPosition: boolean, diagnosticMessage: DiagnosticMessage, arg0?: any): Token<TKind>;
         function parseExpectedToken(t: SyntaxKind, reportAtCurrentPosition: boolean, diagnosticMessage: DiagnosticMessage, arg0?: any): Node {
             return parseOptionalToken(t) ||
                 createMissingNode(t, reportAtCurrentPosition, diagnosticMessage, arg0);
@@ -1047,13 +1130,13 @@ namespace ts {
         }
 
         // note: this function creates only node
-        function createNode(kind: SyntaxKind, pos?: number): Node | Token | Identifier {
+        function createNode<TKind extends SyntaxKind>(kind: TKind, pos?: number): Node | Token<TKind> | Identifier {
             nodeCount++;
             if (!(pos >= 0)) {
                 pos = scanner.getStartPos();
             }
 
-            return kind >= SyntaxKind.FirstNode ? new NodeConstructor(kind, pos, pos) :
+            return isNodeKind(kind) ? new NodeConstructor(kind, pos, pos) :
                 kind === SyntaxKind.Identifier ? new IdentifierConstructor(kind, pos, pos) :
                     new TokenConstructor(kind, pos, pos);
         }
@@ -1101,7 +1184,11 @@ namespace ts {
 
         function internIdentifier(text: string): string {
             text = escapeIdentifier(text);
-            return identifiers[text] || (identifiers[text] = text);
+            let identifier = identifiers.get(text);
+            if (identifier === undefined) {
+                identifiers.set(text, identifier = text);
+            }
+            return identifier;
         }
 
         // An identifier that starts with two underscores has an extra underscore character prepended to it to avoid issues
@@ -1140,7 +1227,7 @@ namespace ts {
 
         function parsePropertyNameWorker(allowComputedPropertyNames: boolean): PropertyName {
             if (token() === SyntaxKind.StringLiteral || token() === SyntaxKind.NumericLiteral) {
-                return parseLiteralNode(/*internName*/ true);
+                return <StringLiteral | NumericLiteral>parseLiteralNode(/*internName*/ true);
             }
             if (allowComputedPropertyNames && token() === SyntaxKind.OpenBracketToken) {
                 return parseComputedPropertyName();
@@ -1196,12 +1283,12 @@ namespace ts {
             if (token() === SyntaxKind.ExportKeyword) {
                 nextToken();
                 if (token() === SyntaxKind.DefaultKeyword) {
-                    return lookAhead(nextTokenIsClassOrFunctionOrAsync);
+                    return lookAhead(nextTokenCanFollowDefaultKeyword);
                 }
                 return token() !== SyntaxKind.AsteriskToken && token() !== SyntaxKind.AsKeyword && token() !== SyntaxKind.OpenBraceToken && canFollowModifier();
             }
             if (token() === SyntaxKind.DefaultKeyword) {
-                return nextTokenIsClassOrFunctionOrAsync();
+                return nextTokenCanFollowDefaultKeyword();
             }
             if (token() === SyntaxKind.StaticKeyword) {
                 nextToken();
@@ -1223,9 +1310,11 @@ namespace ts {
                 || isLiteralPropertyName();
         }
 
-        function nextTokenIsClassOrFunctionOrAsync(): boolean {
+        function nextTokenCanFollowDefaultKeyword(): boolean {
             nextToken();
             return token() === SyntaxKind.ClassKeyword || token() === SyntaxKind.FunctionKeyword ||
+                token() === SyntaxKind.InterfaceKeyword ||
+                (token() === SyntaxKind.AbstractKeyword && lookAhead(nextTokenIsClassKeywordOnSameLine)) ||
                 (token() === SyntaxKind.AsyncKeyword && lookAhead(nextTokenIsFunctionKeywordOnSameLine));
         }
 
@@ -1262,11 +1351,13 @@ namespace ts {
                     // which would be a candidate for improved error reporting.
                     return token() === SyntaxKind.OpenBracketToken || isLiteralPropertyName();
                 case ParsingContext.ObjectLiteralMembers:
-                    return token() === SyntaxKind.OpenBracketToken || token() === SyntaxKind.AsteriskToken || isLiteralPropertyName();
+                    return token() === SyntaxKind.OpenBracketToken || token() === SyntaxKind.AsteriskToken || token() === SyntaxKind.DotDotDotToken || isLiteralPropertyName();
+                case ParsingContext.RestProperties:
+                    return isLiteralPropertyName();
                 case ParsingContext.ObjectBindingElements:
-                    return token() === SyntaxKind.OpenBracketToken || isLiteralPropertyName();
+                    return token() === SyntaxKind.OpenBracketToken || token() === SyntaxKind.DotDotDotToken || isLiteralPropertyName();
                 case ParsingContext.HeritageClauseElement:
-                    // If we see { } then only consume it as an expression if it is followed by , or {
+                    // If we see `{ ... }` then only consume it as an expression if it is followed by `,` or `{`
                     // That way we won't consume the body of a class in its heritage clause.
                     if (token() === SyntaxKind.OpenBraceToken) {
                         return lookAhead(isValidHeritageClauseObjectLiteral);
@@ -1391,11 +1482,12 @@ namespace ts {
                 case ParsingContext.ArrayBindingElements:
                     return token() === SyntaxKind.CloseBracketToken;
                 case ParsingContext.Parameters:
+                case ParsingContext.RestProperties:
                     // Tokens other than ')' and ']' (the latter for index signatures) are here for better error recovery
                     return token() === SyntaxKind.CloseParenToken || token() === SyntaxKind.CloseBracketToken /*|| token === SyntaxKind.OpenBraceToken*/;
                 case ParsingContext.TypeArguments:
-                    // Tokens other than '>' are here for better error recovery
-                    return token() === SyntaxKind.GreaterThanToken || token() === SyntaxKind.OpenParenToken;
+                    // All other tokens should cause the type-argument to terminate except comma token
+                    return token() !== SyntaxKind.CommaToken;
                 case ParsingContext.HeritageClauses:
                     return token() === SyntaxKind.OpenBraceToken || token() === SyntaxKind.CloseBraceToken;
                 case ParsingContext.JsxAttributes:
@@ -1576,6 +1668,9 @@ namespace ts {
                 case ParsingContext.Parameters:
                     return isReusableParameter(node);
 
+                case ParsingContext.RestProperties:
+                    return false;
+
                 // Any other lists we do not care about reusing nodes in.  But feel free to add if
                 // you can do so safely.  Danger areas involve nodes that may involve speculative
                 // parsing.  If speculative parsing is involved with the node, then the range the
@@ -1642,8 +1737,8 @@ namespace ts {
                         // Method declarations are not necessarily reusable.  An object-literal
                         // may have a method calls "constructor(...)" and we must reparse that
                         // into an actual .ConstructorDeclaration.
-                        let methodDeclaration = <MethodDeclaration>node;
-                        let nameIsConstructor = methodDeclaration.name.kind === SyntaxKind.Identifier &&
+                        const methodDeclaration = <MethodDeclaration>node;
+                        const nameIsConstructor = methodDeclaration.name.kind === SyntaxKind.Identifier &&
                             (<Identifier>methodDeclaration.name).originalKeywordKind === SyntaxKind.ConstructorKeyword;
 
                         return !nameIsConstructor;
@@ -1773,6 +1868,7 @@ namespace ts {
                 case ParsingContext.BlockStatements: return Diagnostics.Declaration_or_statement_expected;
                 case ParsingContext.SwitchClauses: return Diagnostics.case_or_default_expected;
                 case ParsingContext.SwitchClauseStatements: return Diagnostics.Statement_expected;
+                case ParsingContext.RestProperties: // fallthrough
                 case ParsingContext.TypeMembers: return Diagnostics.Property_or_signature_expected;
                 case ParsingContext.ClassMembers: return Diagnostics.Unexpected_token_A_constructor_method_accessor_or_property_was_expected;
                 case ParsingContext.EnumMembers: return Diagnostics.Enum_member_expected;
@@ -1796,7 +1892,7 @@ namespace ts {
                 case ParsingContext.JSDocTupleTypes: return Diagnostics.Type_expected;
                 case ParsingContext.JSDocRecordMembers: return Diagnostics.Property_assignment_expected;
             }
-        };
+        }
 
         // Parses a comma-delimited list of elements
         function parseDelimitedList<T extends Node>(kind: ParsingContext, parseElement: () => T, considerSemicolonAsDelimiter?: boolean): NodeArray<T> {
@@ -1920,7 +2016,7 @@ namespace ts {
         function parseTemplateExpression(): TemplateExpression {
             const template = <TemplateExpression>createNode(SyntaxKind.TemplateExpression);
 
-            template.head = parseTemplateLiteralFragment();
+            template.head = parseTemplateHead();
             Debug.assert(template.head.kind === SyntaxKind.TemplateHead, "Template head has wrong token kind");
 
             const templateSpans = createNodeArray<TemplateSpan>();
@@ -1940,14 +2036,13 @@ namespace ts {
             const span = <TemplateSpan>createNode(SyntaxKind.TemplateSpan);
             span.expression = allowInAnd(parseExpression);
 
-            let literal: TemplateLiteralFragment;
-
+            let literal: TemplateMiddle | TemplateTail;
             if (token() === SyntaxKind.CloseBraceToken) {
                 reScanTemplateToken();
-                literal = parseTemplateLiteralFragment();
+                literal = parseTemplateMiddleOrTemplateTail();
             }
             else {
-                literal = <TemplateLiteralFragment>parseExpectedToken(SyntaxKind.TemplateTail, /*reportAtCurrentPosition*/ false, Diagnostics._0_expected, tokenToString(SyntaxKind.CloseBraceToken));
+                literal = <TemplateTail>parseExpectedToken(SyntaxKind.TemplateTail, /*reportAtCurrentPosition*/ false, Diagnostics._0_expected, tokenToString(SyntaxKind.CloseBraceToken));
             }
 
             span.literal = literal;
@@ -1958,8 +2053,16 @@ namespace ts {
             return <LiteralExpression>parseLiteralLikeNode(token(), internName);
         }
 
-        function parseTemplateLiteralFragment(): TemplateLiteralFragment {
-            return <TemplateLiteralFragment>parseLiteralLikeNode(token(), /*internName*/ false);
+        function parseTemplateHead(): TemplateHead {
+            const fragment = parseLiteralLikeNode(token(), /*internName*/ false);
+            Debug.assert(fragment.kind === SyntaxKind.TemplateHead, "Template head has wrong token kind");
+            return <TemplateHead>fragment;
+        }
+
+        function parseTemplateMiddleOrTemplateTail(): TemplateMiddle | TemplateTail {
+            const fragment = parseLiteralLikeNode(token(), /*internName*/ false);
+            Debug.assert(fragment.kind === SyntaxKind.TemplateMiddle || fragment.kind === SyntaxKind.TemplateTail, "Template fragment has wrong token kind");
+            return <TemplateMiddle | TemplateTail>fragment;
         }
 
         function parseLiteralLikeNode(kind: SyntaxKind, internName: boolean): LiteralLikeNode {
@@ -1975,32 +2078,27 @@ namespace ts {
                 node.isUnterminated = true;
             }
 
-            const tokenPos = scanner.getTokenPos();
-            nextToken();
-            finishNode(node);
-
             // Octal literals are not allowed in strict mode or ES5
             // Note that theoretically the following condition would hold true literals like 009,
             // which is not octal.But because of how the scanner separates the tokens, we would
             // never get a token like this. Instead, we would get 00 and 9 as two separate tokens.
             // We also do not need to check for negatives because any prefix operator would be part of a
             // parent unary expression.
-            if (node.kind === SyntaxKind.NumericLiteral
-                && sourceText.charCodeAt(tokenPos) === CharacterCodes._0
-                && isOctalDigit(sourceText.charCodeAt(tokenPos + 1))) {
-
-                node.isOctalLiteral = true;
+            if (node.kind === SyntaxKind.NumericLiteral) {
+                (<NumericLiteral>node).numericLiteralFlags = scanner.getNumericLiteralFlags();
             }
 
+            nextToken();
+            finishNode(node);
+
             return node;
         }
 
         // TYPES
 
         function parseTypeReference(): TypeReferenceNode {
-            const typeName = parseEntityName(/*allowReservedWords*/ false, Diagnostics.Type_expected);
-            const node = <TypeReferenceNode>createNode(SyntaxKind.TypeReference, typeName.pos);
-            node.typeName = typeName;
+            const node = <TypeReferenceNode>createNode(SyntaxKind.TypeReference);
+            node.typeName = parseEntityName(/*allowReservedWords*/ false, Diagnostics.Type_expected);
             if (!scanner.hasPrecedingLineBreak() && token() === SyntaxKind.LessThanToken) {
                 node.typeArguments = parseBracketedList(ParsingContext.TypeArguments, parseType, SyntaxKind.LessThanToken, SyntaxKind.GreaterThanToken);
             }
@@ -2051,10 +2149,14 @@ namespace ts {
                 }
             }
 
+            if (parseOptional(SyntaxKind.EqualsToken)) {
+                node.default = parseType();
+            }
+
             return finishNode(node);
         }
 
-        function parseTypeParameters(): NodeArray<TypeParameterDeclaration> {
+        function parseTypeParameters(): NodeArray<TypeParameterDeclaration> | undefined {
             if (token() === SyntaxKind.LessThanToken) {
                 return parseBracketedList(ParsingContext.TypeParameters, parseTypeParameter, SyntaxKind.LessThanToken, SyntaxKind.GreaterThanToken);
             }
@@ -2075,7 +2177,7 @@ namespace ts {
         function parseParameter(): ParameterDeclaration {
             const node = <ParameterDeclaration>createNode(SyntaxKind.Parameter);
             if (token() === SyntaxKind.ThisKeyword) {
-                node.name = createIdentifier(/*isIdentifier*/true, undefined);
+                node.name = createIdentifier(/*isIdentifier*/ true);
                 node.type = parseParameterType();
                 return finishNode(node);
             }
@@ -2124,7 +2226,7 @@ namespace ts {
         }
 
         function fillSignature(
-            returnToken: SyntaxKind,
+            returnToken: SyntaxKind.ColonToken | SyntaxKind.EqualsGreaterThanToken,
             yieldContext: boolean,
             awaitContext: boolean,
             requireCompleteParameterList: boolean,
@@ -2314,14 +2416,14 @@ namespace ts {
         }
 
         function isTypeMemberStart(): boolean {
-            let idToken: SyntaxKind;
             // Return true if we have the start of a signature member
             if (token() === SyntaxKind.OpenParenToken || token() === SyntaxKind.LessThanToken) {
                 return true;
             }
+            let idToken: boolean;
             // Eat up all modifiers, but hold on to the last one in case it is actually an identifier
             while (isModifierKind(token())) {
-                idToken = token();
+                idToken = true;
                 nextToken();
             }
             // Index signatures and computed property names are type members
@@ -2330,7 +2432,7 @@ namespace ts {
             }
             // Try to get the first property-like token following all modifiers
             if (isLiteralPropertyName()) {
-                idToken = token();
+                idToken = true;
                 nextToken();
             }
             // If we were able to get any potential identifier, check that it is
@@ -2350,7 +2452,7 @@ namespace ts {
             if (token() === SyntaxKind.OpenParenToken || token() === SyntaxKind.LessThanToken) {
                 return parseSignatureMember(SyntaxKind.CallSignature);
             }
-            if (token() === SyntaxKind.NewKeyword && lookAhead(isStartOfConstructSignature)) {
+            if (token() === SyntaxKind.NewKeyword && lookAhead(nextTokenIsOpenParenOrLessThan)) {
                 return parseSignatureMember(SyntaxKind.ConstructSignature);
             }
             const fullStart = getNodePos();
@@ -2361,7 +2463,7 @@ namespace ts {
             return parsePropertyOrMethodSignature(fullStart, modifiers);
         }
 
-        function isStartOfConstructSignature() {
+        function nextTokenIsOpenParenOrLessThan() {
             nextToken();
             return token() === SyntaxKind.OpenParenToken || token() === SyntaxKind.LessThanToken;
         }
@@ -2385,6 +2487,36 @@ namespace ts {
             return members;
         }
 
+        function isStartOfMappedType() {
+            nextToken();
+            if (token() === SyntaxKind.ReadonlyKeyword) {
+                nextToken();
+            }
+            return token() === SyntaxKind.OpenBracketToken && nextTokenIsIdentifier() && nextToken() === SyntaxKind.InKeyword;
+        }
+
+        function parseMappedTypeParameter() {
+            const node = <TypeParameterDeclaration>createNode(SyntaxKind.TypeParameter);
+            node.name = parseIdentifier();
+            parseExpected(SyntaxKind.InKeyword);
+            node.constraint = parseType();
+            return finishNode(node);
+        }
+
+        function parseMappedType() {
+            const node = <MappedTypeNode>createNode(SyntaxKind.MappedType);
+            parseExpected(SyntaxKind.OpenBraceToken);
+            node.readonlyToken = parseOptionalToken(SyntaxKind.ReadonlyKeyword);
+            parseExpected(SyntaxKind.OpenBracketToken);
+            node.typeParameter = parseMappedTypeParameter();
+            parseExpected(SyntaxKind.CloseBracketToken);
+            node.questionToken = parseOptionalToken(SyntaxKind.QuestionToken);
+            node.type = parseTypeAnnotation();
+            parseSemicolon();
+            parseExpected(SyntaxKind.CloseBraceToken);
+            return finishNode(node);
+        }
+
         function parseTupleType(): TupleTypeNode {
             const node = <TupleTypeNode>createNode(SyntaxKind.TupleType);
             node.elementTypes = parseBracketedList(ParsingContext.TupleElementTypes, parseType, SyntaxKind.OpenBracketToken, SyntaxKind.CloseBracketToken);
@@ -2408,7 +2540,7 @@ namespace ts {
             return finishNode(node);
         }
 
-        function parseKeywordAndNoDot(): TypeNode {
+        function parseKeywordAndNoDot(): TypeNode | undefined {
             const node = parseTokenNode<TypeNode>();
             return token() === SyntaxKind.DotToken ? undefined : node;
         }
@@ -2433,6 +2565,7 @@ namespace ts {
                 case SyntaxKind.SymbolKeyword:
                 case SyntaxKind.UndefinedKeyword:
                 case SyntaxKind.NeverKeyword:
+                case SyntaxKind.ObjectKeyword:
                     // If these are followed by a dot, then parse these out as a dotted type reference instead.
                     const node = tryParse(parseKeywordAndNoDot);
                     return node || parseTypeReference();
@@ -2458,7 +2591,7 @@ namespace ts {
                 case SyntaxKind.TypeOfKeyword:
                     return parseTypeQuery();
                 case SyntaxKind.OpenBraceToken:
-                    return parseTypeLiteral();
+                    return lookAhead(isStartOfMappedType) ? parseMappedType() : parseTypeLiteral();
                 case SyntaxKind.OpenBracketToken:
                     return parseTupleType();
                 case SyntaxKind.OpenParenToken:
@@ -2484,11 +2617,14 @@ namespace ts {
                 case SyntaxKind.OpenBraceToken:
                 case SyntaxKind.OpenBracketToken:
                 case SyntaxKind.LessThanToken:
+                case SyntaxKind.BarToken:
+                case SyntaxKind.AmpersandToken:
                 case SyntaxKind.NewKeyword:
                 case SyntaxKind.StringLiteral:
                 case SyntaxKind.NumericLiteral:
                 case SyntaxKind.TrueKeyword:
                 case SyntaxKind.FalseKeyword:
+                case SyntaxKind.ObjectKeyword:
                     return true;
                 case SyntaxKind.MinusToken:
                     return lookAhead(nextTokenIsNumericLiteral);
@@ -2509,15 +2645,41 @@ namespace ts {
         function parseArrayTypeOrHigher(): TypeNode {
             let type = parseNonArrayType();
             while (!scanner.hasPrecedingLineBreak() && parseOptional(SyntaxKind.OpenBracketToken)) {
-                parseExpected(SyntaxKind.CloseBracketToken);
-                const node = <ArrayTypeNode>createNode(SyntaxKind.ArrayType, type.pos);
-                node.elementType = type;
-                type = finishNode(node);
+                if (isStartOfType()) {
+                    const node = <IndexedAccessTypeNode>createNode(SyntaxKind.IndexedAccessType, type.pos);
+                    node.objectType = type;
+                    node.indexType = parseType();
+                    parseExpected(SyntaxKind.CloseBracketToken);
+                    type = finishNode(node);
+                }
+                else {
+                    const node = <ArrayTypeNode>createNode(SyntaxKind.ArrayType, type.pos);
+                    node.elementType = type;
+                    parseExpected(SyntaxKind.CloseBracketToken);
+                    type = finishNode(node);
+                }
             }
             return type;
         }
 
-        function parseUnionOrIntersectionType(kind: SyntaxKind, parseConstituentType: () => TypeNode, operator: SyntaxKind): TypeNode {
+        function parseTypeOperator(operator: SyntaxKind.KeyOfKeyword) {
+            const node = <TypeOperatorNode>createNode(SyntaxKind.TypeOperator);
+            parseExpected(operator);
+            node.operator = operator;
+            node.type = parseTypeOperatorOrHigher();
+            return finishNode(node);
+        }
+
+        function parseTypeOperatorOrHigher(): TypeNode {
+            switch (token()) {
+                case SyntaxKind.KeyOfKeyword:
+                    return parseTypeOperator(SyntaxKind.KeyOfKeyword);
+            }
+            return parseArrayTypeOrHigher();
+        }
+
+        function parseUnionOrIntersectionType(kind: SyntaxKind.UnionType | SyntaxKind.IntersectionType, parseConstituentType: () => TypeNode, operator: SyntaxKind.BarToken | SyntaxKind.AmpersandToken): TypeNode {
+            parseOptional(operator);
             let type = parseConstituentType();
             if (token() === operator) {
                 const types = createNodeArray<TypeNode>([type], type.pos);
@@ -2533,7 +2695,7 @@ namespace ts {
         }
 
         function parseIntersectionTypeOrHigher(): TypeNode {
-            return parseUnionOrIntersectionType(SyntaxKind.IntersectionType, parseArrayTypeOrHigher, SyntaxKind.AmpersandToken);
+            return parseUnionOrIntersectionType(SyntaxKind.IntersectionType, parseTypeOperatorOrHigher, SyntaxKind.AmpersandToken);
         }
 
         function parseUnionTypeOrHigher(): TypeNode {
@@ -2658,6 +2820,8 @@ namespace ts {
                 case SyntaxKind.SlashEqualsToken:
                 case SyntaxKind.Identifier:
                     return true;
+                case SyntaxKind.ImportKeyword:
+                    return lookAhead(nextTokenIsOpenParenOrLessThan);
                 default:
                     return isIdentifier();
             }
@@ -2719,7 +2883,7 @@ namespace ts {
             }
 
             let expr = parseAssignmentExpressionOrHigher();
-            let operatorToken: Node;
+            let operatorToken: BinaryOperatorToken;
             while ((operatorToken = parseOptionalToken(SyntaxKind.CommaToken))) {
                 expr = makeBinaryExpression(expr, operatorToken, parseAssignmentExpressionOrHigher());
             }
@@ -2812,7 +2976,7 @@ namespace ts {
             // Note: we call reScanGreaterToken so that we get an appropriately merged token
             // for cases like > > =  becoming >>=
             if (isLeftHandSideExpression(expr) && isAssignmentOperator(reScanGreaterToken())) {
-                return makeBinaryExpression(expr, parseTokenNode(), parseAssignmentExpressionOrHigher());
+                return makeBinaryExpression(expr, <BinaryOperatorToken>parseTokenNode(), parseAssignmentExpressionOrHigher());
             }
 
             // It wasn't an assignment or a lambda.  This is a conditional expression:
@@ -2841,7 +3005,7 @@ namespace ts {
                 // for now we just check if the next token is an identifier.  More heuristics
                 // can be added here later as necessary.  We just need to make sure that we
                 // don't accidentally consume something legal.
-                return lookAhead(nextTokenIsIdentifierOrKeywordOrNumberOnSameLine);
+                return lookAhead(nextTokenIsIdentifierOrKeywordOrLiteralOnSameLine);
             }
 
             return false;
@@ -2924,7 +3088,7 @@ namespace ts {
             // If we have an arrow, then try to parse the body. Even if not, try to parse if we
             // have an opening brace, just in case we're in an error state.
             const lastToken = token();
-            arrowFunction.equalsGreaterThanToken = parseExpectedToken(SyntaxKind.EqualsGreaterThanToken, /*reportAtCurrentPosition*/false, Diagnostics._0_expected, "=>");
+            arrowFunction.equalsGreaterThanToken = parseExpectedToken(SyntaxKind.EqualsGreaterThanToken, /*reportAtCurrentPosition*/ false, Diagnostics._0_expected, "=>");
             arrowFunction.body = (lastToken === SyntaxKind.EqualsGreaterThanToken || lastToken === SyntaxKind.OpenBraceToken)
                 ? parseArrowFunctionExpressionBody(isAsync)
                 : parseIdentifier();
@@ -3247,7 +3411,7 @@ namespace ts {
                     }
                 }
                 else {
-                    leftOperand = makeBinaryExpression(leftOperand, parseTokenNode(), parseBinaryExpressionOrHigher(newPrecedence));
+                    leftOperand = makeBinaryExpression(leftOperand, <BinaryOperatorToken>parseTokenNode(), parseBinaryExpressionOrHigher(newPrecedence));
                 }
             }
 
@@ -3307,7 +3471,7 @@ namespace ts {
             return -1;
         }
 
-        function makeBinaryExpression(left: Expression, operatorToken: Node, right: Expression): BinaryExpression {
+        function makeBinaryExpression(left: Expression, operatorToken: BinaryOperatorToken, right: Expression): BinaryExpression {
             const node = <BinaryExpression>createNode(SyntaxKind.BinaryExpression, left.pos);
             node.left = left;
             node.operatorToken = operatorToken;
@@ -3324,7 +3488,7 @@ namespace ts {
 
         function parsePrefixUnaryExpression() {
             const node = <PrefixUnaryExpression>createNode(SyntaxKind.PrefixUnaryExpression);
-            node.operator = token();
+            node.operator = <PrefixUnaryOperator>token();
             nextToken();
             node.operand = parseSimpleUnaryExpression();
 
@@ -3359,7 +3523,7 @@ namespace ts {
                 }
 
                 // here we are using similar heuristics as 'isYieldExpression'
-                return lookAhead(nextTokenIsIdentifierOnSameLine);
+                return lookAhead(nextTokenIsIdentifierOrKeywordOrLiteralOnSameLine);
             }
 
             return false;
@@ -3390,10 +3554,10 @@ namespace ts {
              *      5) --UnaryExpression[?Yield]
              */
             if (isUpdateExpression()) {
-                const incrementExpression = parseIncrementExpression();
+                const updateExpression = parseUpdateExpression();
                 return token() === SyntaxKind.AsteriskAsteriskToken ?
-                    <BinaryExpression>parseBinaryExpressionRest(getBinaryOperatorPrecedence(), incrementExpression) :
-                    incrementExpression;
+                    <BinaryExpression>parseBinaryExpressionRest(getBinaryOperatorPrecedence(), updateExpression) :
+                    updateExpression;
             }
 
             /**
@@ -3457,8 +3621,9 @@ namespace ts {
                     if (isAwaitExpression()) {
                         return parseAwaitExpression();
                     }
+                    // falls through
                 default:
-                    return parseIncrementExpression();
+                    return parseUpdateExpression();
             }
         }
 
@@ -3474,7 +3639,7 @@ namespace ts {
          */
         function isUpdateExpression(): boolean {
             // This function is called inside parseUnaryExpression to decide
-            // whether to call parseSimpleUnaryExpression or call parseIncrementExpression directly
+            // whether to call parseSimpleUnaryExpression or call parseUpdateExpression directly
             switch (token()) {
                 case SyntaxKind.PlusToken:
                 case SyntaxKind.MinusToken:
@@ -3490,17 +3655,17 @@ namespace ts {
                     if (sourceFile.languageVariant !== LanguageVariant.JSX) {
                         return false;
                     }
-                // We are in JSX context and the token is part of JSXElement.
-                // Fall through
+                    // We are in JSX context and the token is part of JSXElement.
+                    // falls through
                 default:
                     return true;
             }
         }
 
         /**
-         * Parse ES7 IncrementExpression. IncrementExpression is used instead of ES6's PostFixExpression.
+         * Parse ES7 UpdateExpression. UpdateExpression is used instead of ES6's PostFixExpression.
          *
-         * ES7 IncrementExpression[yield]:
+         * ES7 UpdateExpression[yield]:
          *      1) LeftHandSideExpression[?yield]
          *      2) LeftHandSideExpression[?yield] [[no LineTerminator here]]++
          *      3) LeftHandSideExpression[?yield] [[no LineTerminator here]]--
@@ -3508,10 +3673,10 @@ namespace ts {
          *      5) --LeftHandSideExpression[?yield]
          * In TypeScript (2), (3) are parsed as PostfixUnaryExpression. (4), (5) are parsed as PrefixUnaryExpression
          */
-        function parseIncrementExpression(): IncrementExpression {
+        function parseUpdateExpression(): UpdateExpression {
             if (token() === SyntaxKind.PlusPlusToken || token() === SyntaxKind.MinusMinusToken) {
                 const node = <PrefixUnaryExpression>createNode(SyntaxKind.PrefixUnaryExpression);
-                node.operator = token();
+                node.operator = <PrefixUnaryOperator>token();
                 nextToken();
                 node.operand = parseLeftHandSideExpressionOrHigher();
                 return finishNode(node);
@@ -3527,7 +3692,7 @@ namespace ts {
             if ((token() === SyntaxKind.PlusPlusToken || token() === SyntaxKind.MinusMinusToken) && !scanner.hasPrecedingLineBreak()) {
                 const node = <PostfixUnaryExpression>createNode(SyntaxKind.PostfixUnaryExpression, expression.pos);
                 node.operand = expression;
-                node.operator = token();
+                node.operator = <PostfixUnaryOperator>token();
                 nextToken();
                 return finishNode(node);
             }
@@ -3558,17 +3723,27 @@ namespace ts {
             //      CallExpression Arguments
             //      CallExpression[Expression]
             //      CallExpression.IdentifierName
-            //      super   (   ArgumentListopt   )
+            //      import (AssignmentExpression)
+            //      super Arguments
             //      super.IdentifierName
             //
-            // Because of the recursion in these calls, we need to bottom out first.  There are two
-            // bottom out states we can run into.  Either we see 'super' which must start either of
-            // the last two CallExpression productions.  Or we have a MemberExpression which either
-            // completes the LeftHandSideExpression, or starts the beginning of the first four
-            // CallExpression productions.
-            const expression = token() === SyntaxKind.SuperKeyword
-                ? parseSuperExpression()
-                : parseMemberExpressionOrHigher();
+            // Because of the recursion in these calls, we need to bottom out first. There are three
+            // bottom out states we can run into: 1) We see 'super' which must start either of
+            // the last two CallExpression productions. 2) We see 'import' which must start import call.
+            // 3)we have a MemberExpression which either completes the LeftHandSideExpression,
+            // or starts the beginning of the first four CallExpression productions.
+            let expression: MemberExpression;
+            if (token() === SyntaxKind.ImportKeyword) {
+                // We don't want to eagerly consume all import keyword as import call expression so we look a head to find "("
+                // For example:
+                //      var foo3 = require("subfolder
+                //      import * as foo1 from "module-from-node  -> we want this import to be a statement rather than import call expression
+                sourceFile.flags |= NodeFlags.PossiblyContainsDynamicImport;
+                expression = parseTokenNode<PrimaryExpression>();
+            }
+            else {
+                expression = token() === SyntaxKind.SuperKeyword ? parseSuperExpression() : parseMemberExpressionOrHigher();
+            }
 
             // Now, we *may* be complete.  However, we might have consumed the start of a
             // CallExpression.  As such, we need to consume the rest of it here to be complete.
@@ -3576,7 +3751,7 @@ namespace ts {
         }
 
         function parseMemberExpressionOrHigher(): MemberExpression {
-            // Note: to make our lives simpler, we decompose the the NewExpression productions and
+            // Note: to make our lives simpler, we decompose the NewExpression productions and
             // place ObjectCreationExpression and FunctionExpression into PrimaryExpression.
             // like so:
             //
@@ -3693,14 +3868,14 @@ namespace ts {
             // Since JSX elements are invalid < operands anyway, this lookahead parse will only occur in error scenarios
             // of one sort or another.
             if (inExpressionContext && token() === SyntaxKind.LessThanToken) {
-                const invalidElement = tryParse(() => parseJsxElementOrSelfClosingElement(/*inExpressionContext*/true));
+                const invalidElement = tryParse(() => parseJsxElementOrSelfClosingElement(/*inExpressionContext*/ true));
                 if (invalidElement) {
                     parseErrorAtCurrentToken(Diagnostics.JSX_expressions_must_have_one_parent_element);
                     const badNode = <BinaryExpression>createNode(SyntaxKind.BinaryExpression, result.pos);
                     badNode.end = invalidElement.end;
                     badNode.left = result;
                     badNode.right = invalidElement;
-                    badNode.operatorToken = createMissingNode(SyntaxKind.CommaToken, /*reportAtCurrentPosition*/ false, /*diagnosticMessage*/ undefined);
+                    badNode.operatorToken = <BinaryOperatorToken>createMissingNode(SyntaxKind.CommaToken, /*reportAtCurrentPosition*/ false, /*diagnosticMessage*/ undefined);
                     badNode.operatorToken.pos = badNode.operatorToken.end = badNode.right.pos;
                     return <JsxElement><Node>badNode;
                 }
@@ -3711,6 +3886,7 @@ namespace ts {
 
         function parseJsxText(): JsxText {
             const node = <JsxText>createNode(SyntaxKind.JsxText, scanner.getStartPos());
+            node.containsOnlyWhiteSpaces = currentToken === SyntaxKind.JsxTextAllWhiteSpaces;
             currentToken = scanner.scanJsxToken();
             return finishNode(node);
         }
@@ -3718,6 +3894,7 @@ namespace ts {
         function parseJsxChild(): JsxChild {
             switch (token()) {
                 case SyntaxKind.JsxText:
+                case SyntaxKind.JsxTextAllWhiteSpaces:
                     return parseJsxText();
                 case SyntaxKind.OpenBraceToken:
                     return parseJsxExpression(/*inExpressionContext*/ false);
@@ -3744,7 +3921,13 @@ namespace ts {
                     parseErrorAtPosition(openingTagName.pos, openingTagName.end - openingTagName.pos, Diagnostics.JSX_element_0_has_no_corresponding_closing_tag, getTextOfNodeFromSourceText(sourceText, openingTagName));
                     break;
                 }
-                result.push(parseJsxChild());
+                else if (token() === SyntaxKind.ConflictMarkerTrivia) {
+                    break;
+                }
+                const child = parseJsxChild();
+                if (child) {
+                    result.push(child);
+                }
             }
 
             result.end = scanner.getTokenPos();
@@ -3754,14 +3937,20 @@ namespace ts {
             return result;
         }
 
+        function parseJsxAttributes(): JsxAttributes {
+            const jsxAttributes = <JsxAttributes>createNode(SyntaxKind.JsxAttributes);
+            jsxAttributes.properties = parseList(ParsingContext.JsxAttributes, parseJsxAttribute);
+            return finishNode(jsxAttributes);
+        }
+
         function parseJsxOpeningOrSelfClosingElement(inExpressionContext: boolean): JsxOpeningElement | JsxSelfClosingElement {
             const fullStart = scanner.getStartPos();
 
             parseExpected(SyntaxKind.LessThanToken);
 
             const tagName = parseJsxElementName();
+            const attributes = parseJsxAttributes();
 
-            const attributes = parseList(ParsingContext.JsxAttributes, parseJsxAttribute);
             let node: JsxOpeningLikeElement;
 
             if (token() === SyntaxKind.GreaterThanToken) {
@@ -3812,6 +4001,7 @@ namespace ts {
 
             parseExpected(SyntaxKind.OpenBraceToken);
             if (token() !== SyntaxKind.CloseBraceToken) {
+                node.dotDotDotToken = parseOptionalToken(SyntaxKind.DotDotDotToken);
                 node.expression = parseAssignmentExpressionOrHigher();
             }
             if (inExpressionContext) {
@@ -3836,7 +4026,7 @@ namespace ts {
             if (token() === SyntaxKind.EqualsToken) {
                 switch (scanJsxAttributeValue()) {
                     case SyntaxKind.StringLiteral:
-                        node.initializer = parseLiteralNode();
+                        node.initializer = <StringLiteral>parseLiteralNode();
                         break;
                     default:
                         node.initializer = parseJsxExpression(/*inExpressionContext*/ true);
@@ -3921,7 +4111,7 @@ namespace ts {
                     const tagExpression = <TaggedTemplateExpression>createNode(SyntaxKind.TaggedTemplateExpression, expression.pos);
                     tagExpression.tag = expression;
                     tagExpression.template = token() === SyntaxKind.NoSubstitutionTemplateLiteral
-                        ? parseLiteralNode()
+                        ? <NoSubstitutionTemplateLiteral>parseLiteralNode()
                         : parseTemplateExpression();
                     expression = finishNode(tagExpression);
                     continue;
@@ -4083,7 +4273,7 @@ namespace ts {
         }
 
         function parseSpreadElement(): Expression {
-            const node = <SpreadElementExpression>createNode(SyntaxKind.SpreadElementExpression);
+            const node = <SpreadElement>createNode(SyntaxKind.SpreadElement);
             parseExpected(SyntaxKind.DotDotDotToken);
             node.expression = parseAssignmentExpressionOrHigher();
             return finishNode(node);
@@ -4123,6 +4313,12 @@ namespace ts {
 
         function parseObjectLiteralElement(): ObjectLiteralElementLike {
             const fullStart = scanner.getStartPos();
+            const dotDotDotToken = parseOptionalToken(SyntaxKind.DotDotDotToken);
+            if (dotDotDotToken) {
+                const spreadElement = <SpreadAssignment>createNode(SyntaxKind.SpreadAssignment, fullStart);
+                spreadElement.expression = parseAssignmentExpressionOrHigher();
+                return addJSDocComment(finishNode(spreadElement));
+            }
             const decorators = parseDecorators();
             const modifiers = parseModifiers();
 
@@ -4221,15 +4417,22 @@ namespace ts {
             return isIdentifier() ? parseIdentifier() : undefined;
         }
 
-        function parseNewExpression(): NewExpression {
-            const node = <NewExpression>createNode(SyntaxKind.NewExpression);
+        function parseNewExpression(): NewExpression | MetaProperty {
+            const fullStart = scanner.getStartPos();
             parseExpected(SyntaxKind.NewKeyword);
+            if (parseOptional(SyntaxKind.DotToken)) {
+                const node = <MetaProperty>createNode(SyntaxKind.MetaProperty, fullStart);
+                node.keywordToken = SyntaxKind.NewKeyword;
+                node.name = parseIdentifierName();
+                return finishNode(node);
+            }
+
+            const node = <NewExpression>createNode(SyntaxKind.NewExpression, fullStart);
             node.expression = parseMemberExpressionOrHigher();
             node.typeArguments = tryParse(parseTypeArgumentsInExpression);
             if (node.typeArguments || token() === SyntaxKind.OpenParenToken) {
                 node.arguments = parseArgumentList();
             }
-
             return finishNode(node);
         }
 
@@ -4323,6 +4526,7 @@ namespace ts {
         function parseForOrForInOrForOfStatement(): Statement {
             const pos = getNodePos();
             parseExpected(SyntaxKind.ForKeyword);
+            const awaitToken = parseOptionalToken(SyntaxKind.AwaitKeyword);
             parseExpected(SyntaxKind.OpenParenToken);
 
             let initializer: VariableDeclarationList | Expression = undefined;
@@ -4335,20 +4539,21 @@ namespace ts {
                 }
             }
             let forOrForInOrForOfStatement: IterationStatement;
-            if (parseOptional(SyntaxKind.InKeyword)) {
-                const forInStatement = <ForInStatement>createNode(SyntaxKind.ForInStatement, pos);
-                forInStatement.initializer = initializer;
-                forInStatement.expression = allowInAnd(parseExpression);
-                parseExpected(SyntaxKind.CloseParenToken);
-                forOrForInOrForOfStatement = forInStatement;
-            }
-            else if (parseOptional(SyntaxKind.OfKeyword)) {
+            if (awaitToken ? parseExpected(SyntaxKind.OfKeyword) : parseOptional(SyntaxKind.OfKeyword)) {
                 const forOfStatement = <ForOfStatement>createNode(SyntaxKind.ForOfStatement, pos);
+                forOfStatement.awaitModifier = awaitToken;
                 forOfStatement.initializer = initializer;
                 forOfStatement.expression = allowInAnd(parseAssignmentExpressionOrHigher);
                 parseExpected(SyntaxKind.CloseParenToken);
                 forOrForInOrForOfStatement = forOfStatement;
             }
+            else if (parseOptional(SyntaxKind.InKeyword)) {
+                const forInStatement = <ForInStatement>createNode(SyntaxKind.ForInStatement, pos);
+                forInStatement.initializer = initializer;
+                forInStatement.expression = allowInAnd(parseExpression);
+                parseExpected(SyntaxKind.CloseParenToken);
+                forOrForInOrForOfStatement = forInStatement;
+            }
             else {
                 const forStatement = <ForStatement>createNode(SyntaxKind.ForStatement, pos);
                 forStatement.initializer = initializer;
@@ -4517,14 +4722,19 @@ namespace ts {
             return tokenIsIdentifierOrKeyword(token()) && !scanner.hasPrecedingLineBreak();
         }
 
+        function nextTokenIsClassKeywordOnSameLine() {
+            nextToken();
+            return token() === SyntaxKind.ClassKeyword && !scanner.hasPrecedingLineBreak();
+        }
+
         function nextTokenIsFunctionKeywordOnSameLine() {
             nextToken();
             return token() === SyntaxKind.FunctionKeyword && !scanner.hasPrecedingLineBreak();
         }
 
-        function nextTokenIsIdentifierOrKeywordOrNumberOnSameLine() {
+        function nextTokenIsIdentifierOrKeywordOrLiteralOnSameLine() {
             nextToken();
-            return (tokenIsIdentifierOrKeyword(token()) || token() === SyntaxKind.NumericLiteral) && !scanner.hasPrecedingLineBreak();
+            return (tokenIsIdentifierOrKeyword(token()) || token() === SyntaxKind.NumericLiteral || token() === SyntaxKind.StringLiteral) && !scanner.hasPrecedingLineBreak();
         }
 
         function isDeclaration(): boolean {
@@ -4637,9 +4847,11 @@ namespace ts {
                 case SyntaxKind.FinallyKeyword:
                     return true;
 
+                case SyntaxKind.ImportKeyword:
+                    return isStartOfDeclaration() || lookAhead(nextTokenIsOpenParenOrLessThan);
+
                 case SyntaxKind.ConstKeyword:
                 case SyntaxKind.ExportKeyword:
-                case SyntaxKind.ImportKeyword:
                     return isStartOfDeclaration();
 
                 case SyntaxKind.AsyncKeyword:
@@ -4826,6 +5038,7 @@ namespace ts {
 
         function parseObjectBindingElement(): BindingElement {
             const node = <BindingElement>createNode(SyntaxKind.BindingElement);
+            node.dotDotDotToken = parseOptionalToken(SyntaxKind.DotDotDotToken);
             const tokenIsIdentifier = isIdentifier();
             const propertyName = parsePropertyName();
             if (tokenIsIdentifier && token() !== SyntaxKind.ColonToken) {
@@ -4959,7 +5172,7 @@ namespace ts {
             return addJSDocComment(finishNode(node));
         }
 
-        function parseMethodDeclaration(fullStart: number, decorators: NodeArray<Decorator>, modifiers: NodeArray<Modifier>, asteriskToken: Node, name: PropertyName, questionToken: Node, diagnosticMessage?: DiagnosticMessage): MethodDeclaration {
+        function parseMethodDeclaration(fullStart: number, decorators: NodeArray<Decorator>, modifiers: NodeArray<Modifier>, asteriskToken: AsteriskToken, name: PropertyName, questionToken: QuestionToken, diagnosticMessage?: DiagnosticMessage): MethodDeclaration {
             const method = <MethodDeclaration>createNode(SyntaxKind.MethodDeclaration, fullStart);
             method.decorators = decorators;
             method.modifiers = modifiers;
@@ -4973,7 +5186,7 @@ namespace ts {
             return addJSDocComment(finishNode(method));
         }
 
-        function parsePropertyDeclaration(fullStart: number, decorators: NodeArray<Decorator>, modifiers: NodeArray<Modifier>, name: PropertyName, questionToken: Node): ClassElement {
+        function parsePropertyDeclaration(fullStart: number, decorators: NodeArray<Decorator>, modifiers: NodeArray<Modifier>, name: PropertyName, questionToken: QuestionToken): ClassElement {
             const property = <PropertyDeclaration>createNode(SyntaxKind.PropertyDeclaration, fullStart);
             property.decorators = decorators;
             property.modifiers = modifiers;
@@ -5139,8 +5352,8 @@ namespace ts {
          *
          * In such situations, 'permitInvalidConstAsModifier' should be set to true.
          */
-        function parseModifiers(permitInvalidConstAsModifier?: boolean): NodeArray<Modifier> {
-            let modifiers: NodeArray<Modifier>;
+        function parseModifiers(permitInvalidConstAsModifier?: boolean): NodeArray<Modifier> | undefined {
+            let modifiers: NodeArray<Modifier> | undefined;
             while (true) {
                 const modifierStart = scanner.getStartPos();
                 const modifierKind = token();
@@ -5250,7 +5463,7 @@ namespace ts {
             parseExpected(SyntaxKind.ClassKeyword);
             node.name = parseNameOfClassDeclarationOrExpression();
             node.typeParameters = parseTypeParameters();
-            node.heritageClauses = parseHeritageClauses(/*isClassHeritageClause*/ true);
+            node.heritageClauses = parseHeritageClauses();
 
             if (parseExpected(SyntaxKind.OpenBraceToken)) {
                 // ClassTail[Yield,Await] : (Modified) See 14.5
@@ -5280,7 +5493,7 @@ namespace ts {
             return token() === SyntaxKind.ImplementsKeyword && lookAhead(nextTokenIsIdentifierOrKeyword);
         }
 
-        function parseHeritageClauses(isClassHeritageClause: boolean): NodeArray<HeritageClause> {
+        function parseHeritageClauses(): NodeArray<HeritageClause> | undefined {
             // ClassTail[Yield,Await] : (Modified) See 14.5
             //      ClassHeritage[?Yield,?Await]opt { ClassBody[?Yield,?Await]opt }
 
@@ -5291,10 +5504,11 @@ namespace ts {
             return undefined;
         }
 
-        function parseHeritageClause() {
-            if (token() === SyntaxKind.ExtendsKeyword || token() === SyntaxKind.ImplementsKeyword) {
+        function parseHeritageClause(): HeritageClause | undefined {
+            const tok = token();
+            if (tok === SyntaxKind.ExtendsKeyword || tok === SyntaxKind.ImplementsKeyword) {
                 const node = <HeritageClause>createNode(SyntaxKind.HeritageClause);
-                node.token = token();
+                node.token = tok;
                 nextToken();
                 node.types = parseDelimitedList(ParsingContext.HeritageClauseElement, parseExpressionWithTypeArguments);
                 return finishNode(node);
@@ -5317,7 +5531,7 @@ namespace ts {
             return token() === SyntaxKind.ExtendsKeyword || token() === SyntaxKind.ImplementsKeyword;
         }
 
-        function parseClassMembers() {
+        function parseClassMembers(): NodeArray<ClassElement> {
             return parseList(ParsingContext.ClassMembers, parseClassElement);
         }
 
@@ -5328,7 +5542,7 @@ namespace ts {
             parseExpected(SyntaxKind.InterfaceKeyword);
             node.name = parseIdentifier();
             node.typeParameters = parseTypeParameters();
-            node.heritageClauses = parseHeritageClauses(/*isClassHeritageClause*/ false);
+            node.heritageClauses = parseHeritageClauses();
             node.members = parseObjectTypeMembers();
             return addJSDocComment(finishNode(node));
         }
@@ -5343,7 +5557,7 @@ namespace ts {
             parseExpected(SyntaxKind.EqualsToken);
             node.type = parseType();
             parseSemicolon();
-            return finishNode(node);
+            return addJSDocComment(finishNode(node));
         }
 
         // In an ambient declaration, the grammar only allows integer literals as initializers.
@@ -5395,7 +5609,7 @@ namespace ts {
             node.flags |= flags;
             node.name = parseIdentifier();
             node.body = parseOptional(SyntaxKind.DotToken)
-                ? parseModuleOrNamespaceDeclaration(getNodePos(), /*decorators*/ undefined, /*modifiers*/ undefined, NodeFlags.NestedNamespace | namespaceFlag)
+                ? <NamespaceDeclaration>parseModuleOrNamespaceDeclaration(getNodePos(), /*decorators*/ undefined, /*modifiers*/ undefined, NodeFlags.NestedNamespace | namespaceFlag)
                 : parseModuleBlock();
             return addJSDocComment(finishNode(node));
         }
@@ -5410,7 +5624,7 @@ namespace ts {
                 node.flags |= NodeFlags.GlobalAugmentation;
             }
             else {
-                node.name = parseLiteralNode(/*internName*/ true);
+                node.name = <StringLiteral>parseLiteralNode(/*internName*/ true);
             }
 
             if (token() === SyntaxKind.OpenBraceToken) {
@@ -5463,7 +5677,7 @@ namespace ts {
 
             exportDeclaration.name = parseIdentifier();
 
-            parseExpected(SyntaxKind.SemicolonToken);
+            parseSemicolon();
 
             return finishNode(exportDeclaration);
         }
@@ -5476,17 +5690,7 @@ namespace ts {
             if (isIdentifier()) {
                 identifier = parseIdentifier();
                 if (token() !== SyntaxKind.CommaToken && token() !== SyntaxKind.FromKeyword) {
-                    // ImportEquals declaration of type:
-                    // import x = require("mod"); or
-                    // import x = M.x;
-                    const importEqualsDeclaration = <ImportEqualsDeclaration>createNode(SyntaxKind.ImportEqualsDeclaration, fullStart);
-                    importEqualsDeclaration.decorators = decorators;
-                    importEqualsDeclaration.modifiers = modifiers;
-                    importEqualsDeclaration.name = identifier;
-                    parseExpected(SyntaxKind.EqualsToken);
-                    importEqualsDeclaration.moduleReference = parseModuleReference();
-                    parseSemicolon();
-                    return addJSDocComment(finishNode(importEqualsDeclaration));
+                    return parseImportEqualsDeclaration(fullStart, decorators, modifiers, identifier);
                 }
             }
 
@@ -5510,6 +5714,17 @@ namespace ts {
             return finishNode(importDeclaration);
         }
 
+        function parseImportEqualsDeclaration(fullStart: number, decorators: NodeArray<Decorator>, modifiers: NodeArray<Modifier>, identifier: ts.Identifier): ImportEqualsDeclaration {
+            const importEqualsDeclaration = <ImportEqualsDeclaration>createNode(SyntaxKind.ImportEqualsDeclaration, fullStart);
+            importEqualsDeclaration.decorators = decorators;
+            importEqualsDeclaration.modifiers = modifiers;
+            importEqualsDeclaration.name = identifier;
+            parseExpected(SyntaxKind.EqualsToken);
+            importEqualsDeclaration.moduleReference = parseModuleReference();
+            parseSemicolon();
+            return addJSDocComment(finishNode(importEqualsDeclaration));
+        }
+
         function parseImportClause(identifier: Identifier, fullStart: number) {
             // ImportClause:
             //  ImportedDefaultBinding
@@ -5574,8 +5789,10 @@ namespace ts {
             return finishNode(namespaceImport);
         }
 
+        function parseNamedImportsOrExports(kind: SyntaxKind.NamedImports): NamedImports;
+        function parseNamedImportsOrExports(kind: SyntaxKind.NamedExports): NamedExports;
         function parseNamedImportsOrExports(kind: SyntaxKind): NamedImportsOrExports {
-            const node = <NamedImports>createNode(kind);
+            const node = <NamedImports | NamedExports>createNode(kind);
 
             // NamedImports:
             //  { }
@@ -5585,7 +5802,7 @@ namespace ts {
             // ImportsList:
             //  ImportSpecifier
             //  ImportsList, ImportSpecifier
-            node.elements = parseBracketedList(ParsingContext.ImportOrExportSpecifiers,
+            node.elements = <NodeArray<ImportSpecifier> | NodeArray<ExportSpecifier>>parseBracketedList(ParsingContext.ImportOrExportSpecifiers,
                 kind === SyntaxKind.NamedImports ? parseImportSpecifier : parseExportSpecifier,
                 SyntaxKind.OpenBraceToken, SyntaxKind.CloseBraceToken);
             return finishNode(node);
@@ -5668,11 +5885,12 @@ namespace ts {
         }
 
         function processReferenceComments(sourceFile: SourceFile): void {
-            const triviaScanner = createScanner(sourceFile.languageVersion, /*skipTrivia*/false, LanguageVariant.Standard, sourceText);
+            const triviaScanner = createScanner(sourceFile.languageVersion, /*skipTrivia*/ false, LanguageVariant.Standard, sourceText);
             const referencedFiles: FileReference[] = [];
             const typeReferenceDirectives: FileReference[] = [];
             const amdDependencies: { path: string; name: string }[] = [];
             let amdModuleName: string;
+            let checkJsDirective: CheckJsDirective = undefined;
 
             // Keep scanning all the leading trivia in the file until we get to something that
             // isn't trivia.  Any single line comment will be analyzed to see if it is a
@@ -5688,7 +5906,11 @@ namespace ts {
                     }
                 }
 
-                const range = { pos: triviaScanner.getTokenPos(), end: triviaScanner.getTextPos(), kind: triviaScanner.getToken() };
+                const range = {
+                    kind: <SyntaxKind.SingleLineCommentTrivia | SyntaxKind.MultiLineCommentTrivia>triviaScanner.getToken(),
+                    pos: triviaScanner.getTokenPos(),
+                    end: triviaScanner.getTextPos(),
+                };
 
                 const comment = sourceText.substring(range.pos, range.end);
                 const referencePathMatchResult = getFileReferenceFromReferencePath(comment, range);
@@ -5730,6 +5952,16 @@ namespace ts {
                             amdDependencies.push(amdDependency);
                         }
                     }
+
+                    const checkJsDirectiveRegEx = /^\/\/\/?\s*(@ts-check|@ts-nocheck)\s*$/gim;
+                    const checkJsDirectiveMatchResult = checkJsDirectiveRegEx.exec(comment);
+                    if (checkJsDirectiveMatchResult) {
+                        checkJsDirective = {
+                            enabled: compareStrings(checkJsDirectiveMatchResult[1], "@ts-check", /*ignoreCase*/ true) === Comparison.EqualTo,
+                            end: range.end,
+                            pos: range.pos
+                        };
+                    }
                 }
             }
 
@@ -5737,6 +5969,7 @@ namespace ts {
             sourceFile.typeReferenceDirectives = typeReferenceDirectives;
             sourceFile.amdDependencies = amdDependencies;
             sourceFile.moduleName = amdModuleName;
+            sourceFile.checkJsDirective = checkJsDirective;
         }
 
         function setExternalModuleIndicator(sourceFile: SourceFile) {
@@ -5768,6 +6001,7 @@ namespace ts {
             JsxChildren,               // Things between opening and closing JSX tags
             ArrayLiteralMembers,       // Members in array literal
             Parameters,                // Parameters in parameter list
+            RestProperties,            // Property names in a rest type list
             TypeParameters,            // Type parameters in type parameter list
             TypeArguments,             // Type arguments in type argument list
             TupleElementTypes,         // Element types in tuple element type list
@@ -5806,7 +6040,7 @@ namespace ts {
             }
 
             export function parseJSDocTypeExpressionForTests(content: string, start: number, length: number) {
-                initializeState("file.js", content, ScriptTarget.Latest, /*_syntaxCursor:*/ undefined, ScriptKind.JS);
+                initializeState(content, ScriptTarget.Latest, /*_syntaxCursor:*/ undefined, ScriptKind.JS);
                 sourceFile = createSourceFile("file.js", ScriptTarget.Latest, ScriptKind.JS);
                 scanner.setText(content, start, length);
                 currentToken = scanner.scan();
@@ -5898,7 +6132,10 @@ namespace ts {
                     case SyntaxKind.OpenBraceToken:
                         return parseJSDocRecordType();
                     case SyntaxKind.FunctionKeyword:
-                        return parseJSDocFunctionType();
+                        if (lookAhead(nextTokenIsOpenParen)) {
+                            return parseJSDocFunctionType();
+                        }
+                        break;
                     case SyntaxKind.DotDotDotToken:
                         return parseJSDocVariadicType();
                     case SyntaxKind.NewKeyword:
@@ -5969,14 +6206,15 @@ namespace ts {
                 const parameter = <ParameterDeclaration>createNode(SyntaxKind.Parameter);
                 parameter.type = parseJSDocType();
                 if (parseOptional(SyntaxKind.EqualsToken)) {
-                    parameter.questionToken = createNode(SyntaxKind.EqualsToken);
+                    // TODO(rbuckton): Can this be changed to SyntaxKind.QuestionToken?
+                    parameter.questionToken = <QuestionToken>createNode(SyntaxKind.EqualsToken);
                 }
                 return finishNode(parameter);
             }
 
             function parseJSDocTypeReference(): JSDocTypeReference {
                 const result = <JSDocTypeReference>createNode(SyntaxKind.JSDocTypeReference);
-                result.name = parseSimplePropertyName();
+                result.name = <Identifier>parseSimplePropertyName();
 
                 if (token() === SyntaxKind.LessThanToken) {
                     result.typeArguments = parseTypeArguments();
@@ -6122,7 +6360,7 @@ namespace ts {
             }
 
             export function parseIsolatedJSDocComment(content: string, start: number, length: number) {
-                initializeState("file.js", content, ScriptTarget.Latest, /*_syntaxCursor:*/ undefined, ScriptKind.JS);
+                initializeState(content, ScriptTarget.Latest, /*_syntaxCursor:*/ undefined, ScriptKind.JS);
                 sourceFile = <SourceFile>{ languageVariant: LanguageVariant.Standard, text: content };
                 const jsDoc = parseJSDocCommentWorker(start, length);
                 const diagnostics = parseDiagnostics;
@@ -6141,6 +6379,12 @@ namespace ts {
                     comment.parent = parent;
                 }
 
+                if (isInJavaScriptFile(parent)) {
+                    if (!sourceFile.jsDocDiagnostics) {
+                        sourceFile.jsDocDiagnostics = [];
+                    }
+                    sourceFile.jsDocDiagnostics.push(...parseDiagnostics);
+                }
                 currentToken = saveToken;
                 parseDiagnostics.length = saveParseDiagnosticsLength;
                 parseErrorBeforeNextFinishedNode = saveParseErrorBeforeNextFinishedNode;
@@ -6196,6 +6440,7 @@ namespace ts {
                     }
                     if (token() === SyntaxKind.NewLineTrivia) {
                         state = JSDocState.BeginningOfLine;
+                        indent = 0;
                         nextJSDocToken();
                     }
                     while (token() !== SyntaxKind.EndOfFileToken) {
@@ -6223,7 +6468,7 @@ namespace ts {
                                 break;
                             case SyntaxKind.AsteriskToken:
                                 const asterisk = scanner.getTokenText();
-                                if (state === JSDocState.SawAsterisk) {
+                                if (state === JSDocState.SawAsterisk || state === JSDocState.SavingComments) {
                                     // If we've already seen an asterisk, then we can no longer parse a tag on this line
                                     state = JSDocState.SavingComments;
                                     pushComment(asterisk);
@@ -6244,7 +6489,10 @@ namespace ts {
                             case SyntaxKind.WhitespaceTrivia:
                                 // only collect whitespace if we're already saving comments or have just crossed the comment indent margin
                                 const whitespace = scanner.getTokenText();
-                                if (state === JSDocState.SavingComments || margin !== undefined && indent + whitespace.length > margin) {
+                                if (state === JSDocState.SavingComments) {
+                                    comments.push(whitespace);
+                                }
+                                else if (margin !== undefined && indent + whitespace.length > margin) {
                                     comments.push(whitespace.slice(margin - indent - 1));
                                 }
                                 indent += whitespace.length;
@@ -6252,6 +6500,8 @@ namespace ts {
                             case SyntaxKind.EndOfFileToken:
                                 break;
                             default:
+                                // anything other than whitespace or asterisk at the beginning of the line starts the comment text
+                                state = JSDocState.SavingComments;
                                 pushComment(scanner.getTokenText());
                                 break;
                         }
@@ -6304,7 +6554,7 @@ namespace ts {
 
                 function parseTag(indent: number) {
                     Debug.assert(token() === SyntaxKind.AtToken);
-                    const atToken = createNode(SyntaxKind.AtToken, scanner.getTokenPos());
+                    const atToken = <AtToken>createNode(SyntaxKind.AtToken, scanner.getTokenPos());
                     atToken.end = scanner.getTextPos();
                     nextJSDocToken();
 
@@ -6317,8 +6567,17 @@ namespace ts {
                     let tag: JSDocTag;
                     if (tagName) {
                         switch (tagName.text) {
+                            case "augments":
+                                tag = parseAugmentsTag(atToken, tagName);
+                                break;
+                            case "class":
+                            case "constructor":
+                                tag = parseClassTag(atToken, tagName);
+                                break;
+                            case "arg":
+                            case "argument":
                             case "param":
-                                tag = parseParamTag(atToken, tagName);
+                                tag = parseParameterOrPropertyTag(atToken, tagName, /*shouldParseParamTag*/ true);
                                 break;
                             case "return":
                             case "returns":
@@ -6351,7 +6610,7 @@ namespace ts {
 
                 function parseTagComments(indent: number) {
                     const comments: string[] = [];
-                    let state = JSDocState.SawAsterisk;
+                    let state = JSDocState.BeginningOfLine;
                     let margin: number | undefined;
                     function pushComment(text: string) {
                         if (!margin) {
@@ -6392,7 +6651,8 @@ namespace ts {
                                     indent += scanner.getTokenText().length;
                                     break;
                                 }
-                                // FALLTHROUGH otherwise to record the * as a comment
+                                // record the * as a comment
+                                // falls through
                             default:
                                 state = JSDocState.SavingComments; // leading identifiers start recording as well
                                 pushComment(scanner.getTokenText());
@@ -6410,7 +6670,7 @@ namespace ts {
                     return comments;
                 }
 
-                function parseUnknownTag(atToken: Node, tagName: Identifier) {
+                function parseUnknownTag(atToken: AtToken, tagName: Identifier) {
                     const result = <JSDocTag>createNode(SyntaxKind.JSDocTag, atToken.pos);
                     result.atToken = atToken;
                     result.tagName = tagName;
@@ -6440,17 +6700,12 @@ namespace ts {
                     });
                 }
 
-                function parseParamTag(atToken: Node, tagName: Identifier) {
-                    let typeExpression = tryParseTypeExpression();
-                    skipWhitespace();
-
-                    let name: Identifier;
-                    let isBracketed: boolean;
+                function parseBracketNameInPropertyAndParamTag(): { name: Identifier, isBracketed: boolean } {
                     // Looking for something like '[foo]' or 'foo'
-                    if (parseOptionalToken(SyntaxKind.OpenBracketToken)) {
-                        name = parseJSDocIdentifierName();
+                    const isBracketed = parseOptional(SyntaxKind.OpenBracketToken);
+                    const name = parseJSDocIdentifierName(/*createIfMissing*/ true);
+                    if (isBracketed) {
                         skipWhitespace();
-                        isBracketed = true;
 
                         // May have an optional default, e.g. '[foo = 42]'
                         if (parseOptionalToken(SyntaxKind.EqualsToken)) {
@@ -6459,14 +6714,16 @@ namespace ts {
 
                         parseExpected(SyntaxKind.CloseBracketToken);
                     }
-                    else if (tokenIsIdentifierOrKeyword(token())) {
-                        name = parseJSDocIdentifierName();
-                    }
 
-                    if (!name) {
-                        parseErrorAtPosition(scanner.getStartPos(), 0, Diagnostics.Identifier_expected);
-                        return undefined;
-                    }
+                    return { name, isBracketed };
+                }
+
+                function parseParameterOrPropertyTag(atToken: AtToken, tagName: Identifier, shouldParseParamTag: boolean): JSDocPropertyTag | JSDocParameterTag {
+                    let typeExpression = tryParseTypeExpression();
+                    skipWhitespace();
+
+                    const { name, isBracketed } = parseBracketNameInPropertyAndParamTag();
+                    skipWhitespace();
 
                     let preName: Identifier, postName: Identifier;
                     if (typeExpression) {
@@ -6474,24 +6731,23 @@ namespace ts {
                     }
                     else {
                         preName = name;
-                    }
-
-                    if (!typeExpression) {
                         typeExpression = tryParseTypeExpression();
                     }
 
-                    const result = <JSDocParameterTag>createNode(SyntaxKind.JSDocParameterTag, atToken.pos);
+                    const result = shouldParseParamTag ?
+                        <JSDocParameterTag>createNode(SyntaxKind.JSDocParameterTag, atToken.pos) :
+                        <JSDocPropertyTag>createNode(SyntaxKind.JSDocPropertyTag, atToken.pos);
                     result.atToken = atToken;
                     result.tagName = tagName;
                     result.preParameterName = preName;
                     result.typeExpression = typeExpression;
                     result.postParameterName = postName;
-                    result.parameterName = postName || preName;
+                    result.name = postName || preName;
                     result.isBracketed = isBracketed;
                     return finishNode(result);
                 }
 
-                function parseReturnTag(atToken: Node, tagName: Identifier): JSDocReturnTag {
+                function parseReturnTag(atToken: AtToken, tagName: Identifier): JSDocReturnTag {
                     if (forEach(tags, t => t.kind === SyntaxKind.JSDocReturnTag)) {
                         parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, Diagnostics._0_tag_already_specified, tagName.text);
                     }
@@ -6503,7 +6759,7 @@ namespace ts {
                     return finishNode(result);
                 }
 
-                function parseTypeTag(atToken: Node, tagName: Identifier): JSDocTypeTag {
+                function parseTypeTag(atToken: AtToken, tagName: Identifier): JSDocTypeTag {
                     if (forEach(tags, t => t.kind === SyntaxKind.JSDocTypeTag)) {
                         parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, Diagnostics._0_tag_already_specified, tagName.text);
                     }
@@ -6515,32 +6771,43 @@ namespace ts {
                     return finishNode(result);
                 }
 
-                function parsePropertyTag(atToken: Node, tagName: Identifier): JSDocPropertyTag {
+                function parseAugmentsTag(atToken: AtToken, tagName: Identifier): JSDocAugmentsTag {
                     const typeExpression = tryParseTypeExpression();
-                    skipWhitespace();
-                    const name = parseJSDocIdentifierName();
-                    skipWhitespace();
-                    if (!name) {
-                        parseErrorAtPosition(scanner.getStartPos(), /*length*/ 0, Diagnostics.Identifier_expected);
-                        return undefined;
-                    }
 
-                    const result = <JSDocPropertyTag>createNode(SyntaxKind.JSDocPropertyTag, atToken.pos);
+                    const result = <JSDocAugmentsTag>createNode(SyntaxKind.JSDocAugmentsTag, atToken.pos);
                     result.atToken = atToken;
                     result.tagName = tagName;
-                    result.name = name;
                     result.typeExpression = typeExpression;
                     return finishNode(result);
                 }
 
-                function parseTypedefTag(atToken: Node, tagName: Identifier): JSDocTypedefTag {
+                function parseClassTag(atToken: AtToken, tagName: Identifier): JSDocClassTag {
+                    const tag = <JSDocClassTag>createNode(SyntaxKind.JSDocClassTag, atToken.pos);
+                    tag.atToken = atToken;
+                    tag.tagName = tagName;
+                    return finishNode(tag);
+                }
+
+                function parseTypedefTag(atToken: AtToken, tagName: Identifier): JSDocTypedefTag {
                     const typeExpression = tryParseTypeExpression();
                     skipWhitespace();
 
                     const typedefTag = <JSDocTypedefTag>createNode(SyntaxKind.JSDocTypedefTag, atToken.pos);
                     typedefTag.atToken = atToken;
                     typedefTag.tagName = tagName;
-                    typedefTag.name = parseJSDocIdentifierName();
+                    typedefTag.fullName = parseJSDocTypeNameWithNamespace(/*flags*/ 0);
+                    if (typedefTag.fullName) {
+                        let rightNode = typedefTag.fullName;
+                        while (true) {
+                            if (rightNode.kind === SyntaxKind.Identifier || !rightNode.body) {
+                                // if node is identifier - use it as name
+                                // otherwise use name of the rightmost part that we were able to parse
+                                typedefTag.name = rightNode.kind === SyntaxKind.Identifier ? rightNode : rightNode.name;
+                                break;
+                            }
+                            rightNode = rightNode.body;
+                        }
+                    }
                     typedefTag.typeExpression = typeExpression;
                     skipWhitespace();
 
@@ -6549,13 +6816,13 @@ namespace ts {
                             const jsDocTypeReference = <JSDocTypeReference>typeExpression.type;
                             if (jsDocTypeReference.name.kind === SyntaxKind.Identifier) {
                                 const name = <Identifier>jsDocTypeReference.name;
-                                if (name.text === "Object") {
+                                if (name.text === "Object" || name.text === "object") {
                                     typedefTag.jsDocTypeLiteral = scanChildTags();
                                 }
                             }
                         }
                         if (!typedefTag.jsDocTypeLiteral) {
-                            typedefTag.jsDocTypeLiteral = typeExpression.type;
+                            typedefTag.jsDocTypeLiteral = <JSDocTypeLiteral>typeExpression.type;
                         }
                     }
                     else {
@@ -6596,6 +6863,7 @@ namespace ts {
                                     break;
                                 case SyntaxKind.Identifier:
                                     canParseTag = false;
+                                    break;
                                 case SyntaxKind.EndOfFileToken:
                                     break;
                             }
@@ -6603,11 +6871,30 @@ namespace ts {
                         scanner.setTextPos(resumePos);
                         return finishNode(jsDocTypeLiteral);
                     }
+
+                    function parseJSDocTypeNameWithNamespace(flags: NodeFlags) {
+                        const pos = scanner.getTokenPos();
+                        const typeNameOrNamespaceName = parseJSDocIdentifierName();
+
+                        if (typeNameOrNamespaceName && parseOptional(SyntaxKind.DotToken)) {
+                            const jsDocNamespaceNode = <JSDocNamespaceDeclaration>createNode(SyntaxKind.ModuleDeclaration, pos);
+                            jsDocNamespaceNode.flags |= flags;
+                            jsDocNamespaceNode.name = typeNameOrNamespaceName;
+                            jsDocNamespaceNode.body = parseJSDocTypeNameWithNamespace(NodeFlags.NestedNamespace);
+                            return finishNode(jsDocNamespaceNode);
+                        }
+
+                        if (typeNameOrNamespaceName && flags & NodeFlags.NestedNamespace) {
+                            typeNameOrNamespaceName.isInJSDocNamespace = true;
+                        }
+                        return typeNameOrNamespaceName;
+                    }
                 }
 
+
                 function tryParseChildTag(parentTag: JSDocTypeLiteral): boolean {
                     Debug.assert(token() === SyntaxKind.AtToken);
-                    const atToken = createNode(SyntaxKind.AtToken, scanner.getStartPos());
+                    const atToken = <AtToken>createNode(SyntaxKind.AtToken, scanner.getStartPos());
                     atToken.end = scanner.getTextPos();
                     nextJSDocToken();
 
@@ -6627,17 +6914,21 @@ namespace ts {
                             return true;
                         case "prop":
                         case "property":
-                            if (!parentTag.jsDocPropertyTags) {
-                                parentTag.jsDocPropertyTags = <NodeArray<JSDocPropertyTag>>[];
+                            const propertyTag = parseParameterOrPropertyTag(atToken, tagName, /*shouldParseParamTag*/ false) as JSDocPropertyTag;
+                            if (propertyTag) {
+                                if (!parentTag.jsDocPropertyTags) {
+                                    parentTag.jsDocPropertyTags = <NodeArray<JSDocPropertyTag>>[];
+                                }
+                                parentTag.jsDocPropertyTags.push(propertyTag);
+                                return true;
                             }
-                            const propertyTag = parsePropertyTag(atToken, tagName);
-                            parentTag.jsDocPropertyTags.push(propertyTag);
-                            return true;
+                            // Error parsing property tag
+                            return false;
                     }
                     return false;
                 }
 
-                function parseTemplateTag(atToken: Node, tagName: Identifier): JSDocTemplateTag {
+                function parseTemplateTag(atToken: AtToken, tagName: Identifier): JSDocTemplateTag {
                     if (forEach(tags, t => t.kind === SyntaxKind.JSDocTemplateTag)) {
                         parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, Diagnostics._0_tag_already_specified, tagName.text);
                     }
@@ -6681,14 +6972,19 @@ namespace ts {
                     return currentToken = scanner.scanJSDocToken();
                 }
 
-                function parseJSDocIdentifierName(): Identifier {
-                    return createJSDocIdentifier(tokenIsIdentifierOrKeyword(token()));
+                function parseJSDocIdentifierName(createIfMissing = false): Identifier {
+                    return createJSDocIdentifier(tokenIsIdentifierOrKeyword(token()), createIfMissing);
                 }
 
-                function createJSDocIdentifier(isIdentifier: boolean): Identifier {
+                function createJSDocIdentifier(isIdentifier: boolean, createIfMissing: boolean): Identifier {
                     if (!isIdentifier) {
-                        parseErrorAtCurrentToken(Diagnostics.Identifier_expected);
-                        return undefined;
+                        if (createIfMissing) {
+                            return <Identifier>createMissingNode(SyntaxKind.Identifier, /*reportAtCurrentPosition*/ true, Diagnostics.Identifier_expected);
+                        }
+                        else {
+                            parseErrorAtCurrentToken(Diagnostics.Identifier_expected);
+                            return undefined;
+                        }
                     }
 
                     const pos = scanner.getTokenPos();
@@ -6815,8 +7111,8 @@ namespace ts {
                 }
 
                 forEachChild(node, visitNode, visitArray);
-                if (node.jsDocComments) {
-                    for (const jsDocComment of node.jsDocComments) {
+                if (node.jsDoc) {
+                    for (const jsDocComment of node.jsDoc) {
                         forEachChild(jsDocComment, visitNode, visitArray);
                     }
                 }
@@ -7242,7 +7538,7 @@ namespace ts {
                     if (position >= array.pos && position < array.end) {
                         // position was in this array.  Search through this array to see if we find a
                         // viable element.
-                        for (let i = 0, n = array.length; i < n; i++) {
+                        for (let i = 0; i < array.length; i++) {
                             const child = array[i];
                             if (child) {
                                 if (child.pos === position) {
diff --git a/src/compiler/performance.ts b/src/compiler/performance.ts
index e8f064e..8c24b3b 100644
--- a/src/compiler/performance.ts
+++ b/src/compiler/performance.ts
@@ -12,7 +12,7 @@ namespace ts.performance {
 
     const profilerEvent = typeof onProfilerEvent === "function" && onProfilerEvent.profiler === true
             ? onProfilerEvent
-            : (markName: string) => { };
+            : (_markName: string) => { };
 
     let enabled = false;
     let profilerStart = 0;
@@ -27,8 +27,8 @@ namespace ts.performance {
      */
     export function mark(markName: string) {
         if (enabled) {
-            marks[markName] = timestamp();
-            counts[markName] = (counts[markName] || 0) + 1;
+            marks.set(markName, timestamp());
+            counts.set(markName, (counts.get(markName) || 0) + 1);
             profilerEvent(markName);
         }
     }
@@ -44,9 +44,9 @@ namespace ts.performance {
      */
     export function measure(measureName: string, startMarkName?: string, endMarkName?: string) {
         if (enabled) {
-            const end = endMarkName && marks[endMarkName] || timestamp();
-            const start = startMarkName && marks[startMarkName] || profilerStart;
-            measures[measureName] = (measures[measureName] || 0) + (end - start);
+            const end = endMarkName && marks.get(endMarkName) || timestamp();
+            const start = startMarkName && marks.get(startMarkName) || profilerStart;
+            measures.set(measureName, (measures.get(measureName) || 0) + (end - start));
         }
     }
 
@@ -56,7 +56,7 @@ namespace ts.performance {
      * @param markName The name of the mark.
      */
     export function getCount(markName: string) {
-        return counts && counts[markName] || 0;
+        return counts && counts.get(markName) || 0;
     }
 
     /**
@@ -65,7 +65,7 @@ namespace ts.performance {
      * @param measureName The name of the measure whose durations should be accumulated.
      */
     export function getDuration(measureName: string) {
-        return measures && measures[measureName] || 0;
+        return measures && measures.get(measureName) || 0;
     }
 
     /**
@@ -74,9 +74,9 @@ namespace ts.performance {
      * @param cb The action to perform for each measure
      */
     export function forEachMeasure(cb: (measureName: string, duration: number) => void) {
-        for (const key in measures) {
-            cb(key, measures[key]);
-        }
+        measures.forEach((measure, key) => {
+            cb(key, measure);
+        });
     }
 
     /** Enables (and resets) performance measurements for the compiler. */
diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index 91adb09..bbc0fa0 100644
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -3,11 +3,8 @@
 /// <reference path="core.ts" />
 
 namespace ts {
-    /** The version of the TypeScript compiler release */
-
-    export const version = "2.1.0";
-
     const emptyArray: any[] = [];
+    const ignoreDiagnosticCommentRegEx = /(^\s*$)|(^\s*\/\/\/?\s*(@ts-ignore)?)/;
 
     export function findConfigFile(searchPath: string, fileExists: (fileName: string) => boolean, configName = "tsconfig.json"): string {
         while (true) {
@@ -44,7 +41,8 @@ namespace ts {
                 return;
             }
 
-            for (let i = 0, n = Math.min(commonPathComponents.length, sourcePathComponents.length); i < n; i++) {
+            const n = Math.min(commonPathComponents.length, sourcePathComponents.length);
+            for (let i = 0; i < n; i++) {
                 if (getCanonicalFileName(commonPathComponents[i]) !== getCanonicalFileName(sourcePathComponents[i])) {
                     if (i === 0) {
                         // Failed to find any common path component
@@ -90,9 +88,6 @@ namespace ts {
             return sys.useCaseSensitiveFileNames ? fileName : fileName.toLowerCase();
         }
 
-        // returned by CScript sys environment
-        const unsupportedFileEncodingErrorCode = -2147024809;
-
         function getSourceFile(fileName: string, languageVersion: ScriptTarget, onError?: (message: string) => void): SourceFile {
             let text: string;
             try {
@@ -103,9 +98,7 @@ namespace ts {
             }
             catch (e) {
                 if (onError) {
-                    onError(e.number === unsupportedFileEncodingErrorCode
-                        ? createCompilerDiagnostic(Diagnostics.Unsupported_file_encoding).messageText
-                        : e.message);
+                    onError(e.message);
                 }
                 text = "";
             }
@@ -114,11 +107,11 @@ namespace ts {
         }
 
         function directoryExists(directoryPath: string): boolean {
-            if (directoryPath in existingDirectories) {
+            if (existingDirectories.has(directoryPath)) {
                 return true;
             }
             if (sys.directoryExists(directoryPath)) {
-                existingDirectories[directoryPath] = true;
+                existingDirectories.set(directoryPath, true);
                 return true;
             }
             return false;
@@ -142,11 +135,11 @@ namespace ts {
             const hash = sys.createHash(data);
             const mtimeBefore = sys.getModifiedTime(fileName);
 
-            if (mtimeBefore && fileName in outputFingerprints) {
-                const fingerprint = outputFingerprints[fileName];
-
+            if (mtimeBefore) {
+                const fingerprint = outputFingerprints.get(fileName);
                 // If output has not been changed, and the file has no external modification
-                if (fingerprint.byteOrderMark === writeByteOrderMark &&
+                if (fingerprint &&
+                    fingerprint.byteOrderMark === writeByteOrderMark &&
                     fingerprint.hash === hash &&
                     fingerprint.mtime.getTime() === mtimeBefore.getTime()) {
                     return;
@@ -157,11 +150,11 @@ namespace ts {
 
             const mtimeAfter = sys.getModifiedTime(fileName);
 
-            outputFingerprints[fileName] = {
+            outputFingerprints.set(fileName, {
                 hash,
                 byteOrderMark: writeByteOrderMark,
                 mtime: mtimeAfter
-            };
+            });
         }
 
         function writeFile(fileName: string, data: string, writeByteOrderMark: boolean, onError?: (message: string) => void) {
@@ -206,7 +199,7 @@ namespace ts {
             readFile: fileName => sys.readFile(fileName),
             trace: (s: string) => sys.write(s + newLine),
             directoryExists: directoryName => sys.directoryExists(directoryName),
-            getEnvironmentVariable: name => getEnvironmentVariable(name, /*host*/ undefined),
+            getEnvironmentVariable: name => sys.getEnvironmentVariable ? sys.getEnvironmentVariable(name) : "",
             getDirectories: (path: string) => sys.getDirectories(path),
             realpath
         };
@@ -239,11 +232,106 @@ namespace ts {
                 const { line, character } = getLineAndCharacterOfPosition(diagnostic.file, diagnostic.start);
                 const fileName = diagnostic.file.fileName;
                 const relativeFileName = convertToRelativePath(fileName, host.getCurrentDirectory(), fileName => host.getCanonicalFileName(fileName));
-                output += `${ relativeFileName }(${ line + 1 },${ character + 1 }): `;
+                output += `${relativeFileName}(${line + 1},${character + 1}): `;
             }
 
             const category = DiagnosticCategory[diagnostic.category].toLowerCase();
-            output += `${ category } TS${ diagnostic.code }: ${ flattenDiagnosticMessageText(diagnostic.messageText, host.getNewLine()) }${ host.getNewLine() }`;
+            output += `${category} TS${diagnostic.code}: ${flattenDiagnosticMessageText(diagnostic.messageText, host.getNewLine())}${host.getNewLine()}`;
+        }
+        return output;
+    }
+
+    const redForegroundEscapeSequence = "\u001b[91m";
+    const yellowForegroundEscapeSequence = "\u001b[93m";
+    const blueForegroundEscapeSequence = "\u001b[93m";
+    const gutterStyleSequence = "\u001b[100;30m";
+    const gutterSeparator = " ";
+    const resetEscapeSequence = "\u001b[0m";
+    const ellipsis = "...";
+    function getCategoryFormat(category: DiagnosticCategory): string {
+        switch (category) {
+            case DiagnosticCategory.Warning: return yellowForegroundEscapeSequence;
+            case DiagnosticCategory.Error: return redForegroundEscapeSequence;
+            case DiagnosticCategory.Message: return blueForegroundEscapeSequence;
+        }
+    }
+
+    function formatAndReset(text: string, formatStyle: string) {
+        return formatStyle + text + resetEscapeSequence;
+    }
+
+    function padLeft(s: string, length: number) {
+        while (s.length < length) {
+            s = " " + s;
+        }
+        return s;
+    }
+
+    export function formatDiagnosticsWithColorAndContext(diagnostics: Diagnostic[], host: FormatDiagnosticsHost): string {
+        let output = "";
+        for (const diagnostic of diagnostics) {
+            if (diagnostic.file) {
+                const { start, length, file } = diagnostic;
+                const { line: firstLine, character: firstLineChar } = getLineAndCharacterOfPosition(file, start);
+                const { line: lastLine, character: lastLineChar } = getLineAndCharacterOfPosition(file, start + length);
+                const lastLineInFile = getLineAndCharacterOfPosition(file, file.text.length).line;
+                const relativeFileName = host ? convertToRelativePath(file.fileName, host.getCurrentDirectory(), fileName => host.getCanonicalFileName(fileName)) : file.fileName;
+
+                const hasMoreThanFiveLines = (lastLine - firstLine) >= 4;
+                let gutterWidth = (lastLine + 1 + "").length;
+                if (hasMoreThanFiveLines) {
+                    gutterWidth = Math.max(ellipsis.length, gutterWidth);
+                }
+
+                output += sys.newLine;
+                for (let i = firstLine; i <= lastLine; i++) {
+                    // If the error spans over 5 lines, we'll only show the first 2 and last 2 lines,
+                    // so we'll skip ahead to the second-to-last line.
+                    if (hasMoreThanFiveLines && firstLine + 1 < i && i < lastLine - 1) {
+                        output += formatAndReset(padLeft(ellipsis, gutterWidth), gutterStyleSequence) + gutterSeparator + sys.newLine;
+                        i = lastLine - 1;
+                    }
+
+                    const lineStart = getPositionOfLineAndCharacter(file, i, 0);
+                    const lineEnd = i < lastLineInFile ? getPositionOfLineAndCharacter(file, i + 1, 0) : file.text.length;
+                    let lineContent = file.text.slice(lineStart, lineEnd);
+                    lineContent = lineContent.replace(/\s+$/g, "");  // trim from end
+                    lineContent = lineContent.replace("\t", " ");    // convert tabs to single spaces
+
+                    // Output the gutter and the actual contents of the line.
+                    output += formatAndReset(padLeft(i + 1 + "", gutterWidth), gutterStyleSequence) + gutterSeparator;
+                    output += lineContent + sys.newLine;
+
+                    // Output the gutter and the error span for the line using tildes.
+                    output += formatAndReset(padLeft("", gutterWidth), gutterStyleSequence) + gutterSeparator;
+                    output += redForegroundEscapeSequence;
+                    if (i === firstLine) {
+                        // If we're on the last line, then limit it to the last character of the last line.
+                        // Otherwise, we'll just squiggle the rest of the line, giving 'slice' no end position.
+                        const lastCharForLine = i === lastLine ? lastLineChar : undefined;
+
+                        output += lineContent.slice(0, firstLineChar).replace(/\S/g, " ");
+                        output += lineContent.slice(firstLineChar, lastCharForLine).replace(/./g, "~");
+                    }
+                    else if (i === lastLine) {
+                        output += lineContent.slice(0, lastLineChar).replace(/./g, "~");
+                    }
+                    else {
+                        // Squiggle the entire line.
+                        output += lineContent.replace(/./g, "~");
+                    }
+                    output += resetEscapeSequence;
+
+                    output += sys.newLine;
+                }
+
+                output += sys.newLine;
+                output += `${ relativeFileName }(${ firstLine + 1 },${ firstLineChar + 1 }): `;
+            }
+
+            const categoryColor = getCategoryFormat(diagnostic.category);
+            const category = DiagnosticCategory[diagnostic.category].toLowerCase();
+            output += `${ formatAndReset(category, categoryColor) } TS${ diagnostic.code }: ${ flattenDiagnosticMessageText(diagnostic.messageText, sys.newLine) }`;
         }
         return output;
     }
@@ -281,14 +369,36 @@ namespace ts {
         const resolutions: T[] = [];
         const cache = createMap<T>();
         for (const name of names) {
-            const result = name in cache
-                ? cache[name]
-                : cache[name] = loader(name, containingFile);
+            let result: T;
+            if (cache.has(name)) {
+                result = cache.get(name);
+            }
+            else {
+                cache.set(name, result = loader(name, containingFile));
+            }
             resolutions.push(result);
         }
         return resolutions;
     }
 
+    interface DiagnosticCache {
+        perFile?: FileMap<Diagnostic[]>;
+        allDiagnostics?: Diagnostic[];
+    }
+
+    /**
+     * Create a new 'Program' instance. A Program is an immutable collection of 'SourceFile's and a 'CompilerOptions'
+     * that represent a compilation unit.
+     *
+     * Creating a program proceeds from a set of root files, expanding the set of inputs by following imports and
+     * triple-slash-reference-path directives transitively. '@types' and triple-slash-reference-types are also pulled in.
+     *
+     * @param rootNames - A set of root files.
+     * @param options - The compiler options which should be used.
+     * @param host - The host interacts with the underlying file system.
+     * @param oldProgram - Reuses an old program structure.
+     * @returns A 'Program' object.
+     */
     export function createProgram(rootNames: string[], options: CompilerOptions, host?: CompilerHost, oldProgram?: Program): Program {
         let program: Program;
         let files: SourceFile[] = [];
@@ -296,6 +406,10 @@ namespace ts {
         let diagnosticsProducingTypeChecker: TypeChecker;
         let noDiagnosticsTypeChecker: TypeChecker;
         let classifiableNames: Map<string>;
+        let modifiedFilePaths: Path[] | undefined;
+
+        const cachedSemanticDiagnosticsForFile: DiagnosticCache = {};
+        const cachedDeclarationDiagnosticsForFile: DiagnosticCache = {};
 
         let resolvedTypeReferenceDirectives = createMap<ResolvedTypeReferenceDirective>();
         let fileProcessingDiagnostics = createDiagnosticCollection();
@@ -307,7 +421,7 @@ namespace ts {
         // - This calls resolveModuleNames, and then calls findSourceFile for each resolved module.
         // As all these operations happen - and are nested - within the createProgram call, they close over the below variables.
         // The current resolution depth is tracked by incrementing/decrementing as the depth first search progresses.
-        const maxNodeModulesJsDepth = typeof options.maxNodeModuleJsDepth === "number" ? options.maxNodeModuleJsDepth : 0;
+        const maxNodeModuleJsDepth = typeof options.maxNodeModuleJsDepth === "number" ? options.maxNodeModuleJsDepth : 0;
         let currentNodeModulesDepth = 0;
 
         // If a module has some of its imports skipped due to being at the depth limit under node_modules, then track
@@ -328,13 +442,24 @@ namespace ts {
 
         // Map storing if there is emit blocking diagnostics for given input
         const hasEmitBlockingDiagnostics = createFileMap<boolean>(getCanonicalFileName);
+        let _compilerOptionsObjectLiteralSyntax: ObjectLiteralExpression;
 
-        let resolveModuleNamesWorker: (moduleNames: string[], containingFile: string) => ResolvedModule[];
+        let moduleResolutionCache: ModuleResolutionCache;
+        let resolveModuleNamesWorker: (moduleNames: string[], containingFile: string) => ResolvedModuleFull[];
         if (host.resolveModuleNames) {
-            resolveModuleNamesWorker = (moduleNames, containingFile) => host.resolveModuleNames(moduleNames, containingFile);
+            resolveModuleNamesWorker = (moduleNames, containingFile) => host.resolveModuleNames(moduleNames, containingFile).map(resolved => {
+                // An older host may have omitted extension, in which case we should infer it from the file extension of resolvedFileName.
+                if (!resolved || (resolved as ResolvedModuleFull).extension !== undefined) {
+                    return resolved as ResolvedModuleFull;
+                }
+                const withExtension = clone(resolved) as ResolvedModuleFull;
+                withExtension.extension = extensionFromPath(resolved.resolvedFileName);
+                return withExtension;
+            });
         }
         else {
-            const loader = (moduleName: string, containingFile: string) => resolveModuleName(moduleName, containingFile, options, host).resolvedModule;
+            moduleResolutionCache = createModuleResolutionCache(currentDirectory, x => host.getCanonicalFileName(x));
+            const loader = (moduleName: string, containingFile: string) => resolveModuleName(moduleName, containingFile, options, host, moduleResolutionCache).resolvedModule;
             resolveModuleNamesWorker = (moduleNames, containingFile) => loadWithLocalCache(moduleNames, containingFile, loader);
         }
 
@@ -352,15 +477,17 @@ namespace ts {
         // used to track cases when two file names differ only in casing
         const filesByNameIgnoreCase = host.useCaseSensitiveFileNames() ? createFileMap<SourceFile>(fileName => fileName.toLowerCase()) : undefined;
 
-        if (!tryReuseStructureFromOldProgram()) {
+        const structuralIsReused = tryReuseStructureFromOldProgram();
+        if (structuralIsReused !== StructureIsReused.Completely) {
             forEach(rootNames, name => processRootFile(name, /*isDefaultLib*/ false));
 
             // load type declarations specified via 'types' argument or implicitly from types/ and node_modules/@types folders
             const typeReferences: string[] = getAutomaticTypeDirectiveNames(options, host);
 
-            if (typeReferences) {
+            if (typeReferences.length) {
                 // This containingFilename needs to match with the one used in managed-side
-                const containingFilename = combinePaths(host.getCurrentDirectory(), "__inferred type names__.ts");
+                const containingDirectory = options.configFilePath ? getDirectoryPath(options.configFilePath) : host.getCurrentDirectory();
+                const containingFilename = combinePaths(containingDirectory, "__inferred type names__.ts");
                 const resolutions = resolveTypeReferenceDirectiveNamesWorker(typeReferences, containingFilename);
                 for (let i = 0; i < typeReferences.length; i++) {
                     processTypeReferenceDirective(typeReferences[i], resolutions[i]);
@@ -386,6 +513,9 @@ namespace ts {
             }
         }
 
+        // unconditionally set moduleResolutionCache to undefined to avoid unnecessary leaks
+        moduleResolutionCache = undefined;
+
         // unconditionally set oldProgram to undefined to prevent it from being captured in closure
         oldProgram = undefined;
 
@@ -412,7 +542,9 @@ namespace ts {
             getTypeCount: () => getDiagnosticsProducingTypeChecker().getTypeCount(),
             getFileProcessingDiagnostics: () => fileProcessingDiagnostics,
             getResolvedTypeReferenceDirectives: () => resolvedTypeReferenceDirectives,
-            dropDiagnosticsProducingTypeChecker
+            isSourceFileFromExternalLibrary,
+            dropDiagnosticsProducingTypeChecker,
+            getSourceFileFromReference,
         };
 
         verifyCompilerOptions();
@@ -422,13 +554,14 @@ namespace ts {
         return program;
 
         function getCommonSourceDirectory() {
-            if (typeof commonSourceDirectory === "undefined") {
-                if (options.rootDir && checkSourceFilesBelongToPath(files, options.rootDir)) {
+            if (commonSourceDirectory === undefined) {
+                const emittedFiles = filter(files, file => sourceFileMayBeEmitted(file, options, isSourceFileFromExternalLibrary));
+                if (options.rootDir && checkSourceFilesBelongToPath(emittedFiles, options.rootDir)) {
                     // If a rootDir is specified and is valid use it as the commonSourceDirectory
                     commonSourceDirectory = getNormalizedAbsolutePath(options.rootDir, currentDirectory);
                 }
                 else {
-                    commonSourceDirectory = computeCommonSourceDirectory(files);
+                    commonSourceDirectory = computeCommonSourceDirectory(emittedFiles);
                 }
                 if (commonSourceDirectory && commonSourceDirectory[commonSourceDirectory.length - 1] !== directorySeparator) {
                     // Make sure directory path ends with directory separator so this string can directly
@@ -447,131 +580,286 @@ namespace ts {
                 classifiableNames = createMap<string>();
 
                 for (const sourceFile of files) {
-                    copyProperties(sourceFile.classifiableNames, classifiableNames);
+                    copyEntries(sourceFile.classifiableNames, classifiableNames);
                 }
             }
 
             return classifiableNames;
         }
 
-        function tryReuseStructureFromOldProgram(): boolean {
+        interface OldProgramState {
+            program: Program | undefined;
+            file: SourceFile;
+            /** The collection of paths modified *since* the old program. */
+            modifiedFilePaths: Path[];
+        }
+
+        function resolveModuleNamesReusingOldState(moduleNames: string[], containingFile: string, file: SourceFile, oldProgramState: OldProgramState) {
+            if (structuralIsReused === StructureIsReused.Not && !file.ambientModuleNames.length) {
+                // If the old program state does not permit reusing resolutions and `file` does not contain locally defined ambient modules,
+                // the best we can do is fallback to the default logic.
+                return resolveModuleNamesWorker(moduleNames, containingFile);
+            }
+
+            const oldSourceFile = oldProgramState.program && oldProgramState.program.getSourceFile(containingFile);
+            if (oldSourceFile !== file && file.resolvedModules) {
+                // `file` was created for the new program.
+                //
+                // We only set `file.resolvedModules` via work from the current function,
+                // so it is defined iff we already called the current function on `file`.
+                // That call happened no later than the creation of the `file` object,
+                // which per above occured during the current program creation.
+                // Since we assume the filesystem does not change during program creation,
+                // it is safe to reuse resolutions from the earlier call.
+                const result: ResolvedModuleFull[] = [];
+                for (const moduleName of moduleNames) {
+                    const resolvedModule = file.resolvedModules.get(moduleName);
+                    result.push(resolvedModule);
+                }
+                return result;
+            }
+            // At this point, we know at least one of the following hold:
+            // - file has local declarations for ambient modules
+            // - old program state is available
+            // With this information, we can infer some module resolutions without performing resolution.
+
+            /** An ordered list of module names for which we cannot recover the resolution. */
+            let unknownModuleNames: string[];
+            /**
+             * The indexing of elements in this list matches that of `moduleNames`.
+             *
+             * Before combining results, result[i] is in one of the following states:
+             * * undefined: needs to be recomputed,
+             * * predictedToResolveToAmbientModuleMarker: known to be an ambient module.
+             * Needs to be reset to undefined before returning,
+             * * ResolvedModuleFull instance: can be reused.
+             */
+            let result: ResolvedModuleFull[];
+            /** A transient placeholder used to mark predicted resolution in the result list. */
+            const predictedToResolveToAmbientModuleMarker: ResolvedModuleFull = <any>{};
+
+
+            for (let i = 0; i < moduleNames.length; i++) {
+                const moduleName = moduleNames[i];
+                // If we want to reuse resolutions more aggressively, we can refine this to check for whether the
+                // text of the corresponding modulenames has changed.
+                if (file === oldSourceFile) {
+                    const oldResolvedModule = oldSourceFile && oldSourceFile.resolvedModules.get(moduleName);
+                    if (oldResolvedModule) {
+                        if (isTraceEnabled(options, host)) {
+                            trace(host, Diagnostics.Reusing_resolution_of_module_0_to_file_1_from_old_program, moduleName, containingFile);
+                        }
+                        (result || (result = new Array(moduleNames.length)))[i] = oldResolvedModule;
+                        continue;
+                    }
+                }
+                // We know moduleName resolves to an ambient module provided that moduleName:
+                // - is in the list of ambient modules locally declared in the current source file.
+                // - resolved to an ambient module in the old program whose declaration is in an unmodified file
+                //   (so the same module declaration will land in the new program)
+                let resolvesToAmbientModuleInNonModifiedFile = false;
+                if (contains(file.ambientModuleNames, moduleName)) {
+                    resolvesToAmbientModuleInNonModifiedFile = true;
+                    if (isTraceEnabled(options, host)) {
+                        trace(host, Diagnostics.Module_0_was_resolved_as_locally_declared_ambient_module_in_file_1, moduleName, containingFile);
+                    }
+                }
+                else {
+                    resolvesToAmbientModuleInNonModifiedFile = moduleNameResolvesToAmbientModuleInNonModifiedFile(moduleName, oldProgramState);
+                }
+
+                if (resolvesToAmbientModuleInNonModifiedFile) {
+                    (result || (result = new Array(moduleNames.length)))[i] = predictedToResolveToAmbientModuleMarker;
+                }
+                else {
+                    // Resolution failed in the old program, or resolved to an ambient module for which we can't reuse the result.
+                    (unknownModuleNames || (unknownModuleNames = [])).push(moduleName);
+                }
+            }
+
+            const resolutions = unknownModuleNames && unknownModuleNames.length
+                ? resolveModuleNamesWorker(unknownModuleNames, containingFile)
+                : emptyArray;
+
+            // Combine results of resolutions and predicted results
+            if (!result) {
+                // There were no unresolved/ambient resolutions.
+                Debug.assert(resolutions.length === moduleNames.length);
+                return <ResolvedModuleFull[]>resolutions;
+            }
+
+            let j = 0;
+            for (let i = 0; i < result.length; i++) {
+                if (result[i]) {
+                    // `result[i]` is either a `ResolvedModuleFull` or a marker.
+                    // If it is the former, we can leave it as is.
+                    if (result[i] === predictedToResolveToAmbientModuleMarker) {
+                        result[i] = undefined;
+                    }
+                }
+                else {
+                    result[i] = resolutions[j];
+                    j++;
+                }
+            }
+            Debug.assert(j === resolutions.length);
+
+            return result;
+
+            // If we change our policy of rechecking failed lookups on each program create,
+            // we should adjust the value returned here.
+            function moduleNameResolvesToAmbientModuleInNonModifiedFile(moduleName: string, oldProgramState: OldProgramState): boolean {
+                const resolutionToFile = getResolvedModule(oldProgramState.file, moduleName);
+                if (resolutionToFile) {
+                    // module used to be resolved to file - ignore it
+                    return false;
+                }
+                const ambientModule = oldProgramState.program && oldProgramState.program.getTypeChecker().tryFindAmbientModuleWithoutAugmentations(moduleName);
+                if (!(ambientModule && ambientModule.declarations)) {
+                    return false;
+                }
+
+                // at least one of declarations should come from non-modified source file
+                const firstUnmodifiedFile = forEach(ambientModule.declarations, d => {
+                    const f = getSourceFileOfNode(d);
+                    return !contains(oldProgramState.modifiedFilePaths, f.path) && f;
+                });
+
+                if (!firstUnmodifiedFile) {
+                    return false;
+                }
+
+                if (isTraceEnabled(options, host)) {
+                    trace(host, Diagnostics.Module_0_was_resolved_as_ambient_module_declared_in_1_since_this_file_was_not_modified, moduleName, firstUnmodifiedFile.fileName);
+                }
+                return true;
+            }
+        }
+
+        function tryReuseStructureFromOldProgram(): StructureIsReused {
             if (!oldProgram) {
-                return false;
+                return StructureIsReused.Not;
             }
 
             // check properties that can affect structure of the program or module resolution strategy
             // if any of these properties has changed - structure cannot be reused
             const oldOptions = oldProgram.getCompilerOptions();
-            if ((oldOptions.module !== options.module) ||
-                (oldOptions.moduleResolution !== options.moduleResolution) ||
-                (oldOptions.noResolve !== options.noResolve) ||
-                (oldOptions.target !== options.target) ||
-                (oldOptions.noLib !== options.noLib) ||
-                (oldOptions.jsx !== options.jsx) ||
-                (oldOptions.allowJs !== options.allowJs) ||
-                (oldOptions.rootDir !== options.rootDir) ||
-                (oldOptions.configFilePath !== options.configFilePath) ||
-                (oldOptions.baseUrl !== options.baseUrl) ||
-                (oldOptions.maxNodeModuleJsDepth !== options.maxNodeModuleJsDepth) ||
-                !arrayIsEqualTo(oldOptions.typeRoots, oldOptions.typeRoots) ||
-                !arrayIsEqualTo(oldOptions.rootDirs, options.rootDirs) ||
-                !equalOwnProperties(oldOptions.paths, options.paths)) {
-                return false;
-            }
-
-            Debug.assert(!oldProgram.structureIsReused);
+            if (changesAffectModuleResolution(oldOptions, options)) {
+                return oldProgram.structureIsReused = StructureIsReused.Not;
+            }
+
+            Debug.assert(!(oldProgram.structureIsReused & (StructureIsReused.Completely | StructureIsReused.SafeModules)));
 
             // there is an old program, check if we can reuse its structure
             const oldRootNames = oldProgram.getRootFileNames();
             if (!arrayIsEqualTo(oldRootNames, rootNames)) {
-                return false;
+                return oldProgram.structureIsReused = StructureIsReused.Not;
             }
 
             if (!arrayIsEqualTo(options.types, oldOptions.types)) {
-                return false;
+                return oldProgram.structureIsReused = StructureIsReused.Not;
             }
 
             // check if program source files has changed in the way that can affect structure of the program
             const newSourceFiles: SourceFile[] = [];
             const filePaths: Path[] = [];
-            const modifiedSourceFiles: SourceFile[] = [];
+            const modifiedSourceFiles: { oldFile: SourceFile, newFile: SourceFile }[] = [];
+            oldProgram.structureIsReused = StructureIsReused.Completely;
 
             for (const oldSourceFile of oldProgram.getSourceFiles()) {
-                let newSourceFile = host.getSourceFileByPath
+                const newSourceFile = host.getSourceFileByPath
                     ? host.getSourceFileByPath(oldSourceFile.fileName, oldSourceFile.path, options.target)
                     : host.getSourceFile(oldSourceFile.fileName, options.target);
 
                 if (!newSourceFile) {
-                    return false;
+                    return oldProgram.structureIsReused = StructureIsReused.Not;
                 }
 
                 newSourceFile.path = oldSourceFile.path;
                 filePaths.push(newSourceFile.path);
 
                 if (oldSourceFile !== newSourceFile) {
+                    // The `newSourceFile` object was created for the new program.
+
                     if (oldSourceFile.hasNoDefaultLib !== newSourceFile.hasNoDefaultLib) {
                         // value of no-default-lib has changed
                         // this will affect if default library is injected into the list of files
-                        return false;
+                        oldProgram.structureIsReused = StructureIsReused.SafeModules;
                     }
 
                     // check tripleslash references
                     if (!arrayIsEqualTo(oldSourceFile.referencedFiles, newSourceFile.referencedFiles, fileReferenceIsEqualTo)) {
                         // tripleslash references has changed
-                        return false;
+                        oldProgram.structureIsReused = StructureIsReused.SafeModules;
                     }
 
                     // check imports and module augmentations
                     collectExternalModuleReferences(newSourceFile);
                     if (!arrayIsEqualTo(oldSourceFile.imports, newSourceFile.imports, moduleNameIsEqualTo)) {
                         // imports has changed
-                        return false;
+                        oldProgram.structureIsReused = StructureIsReused.SafeModules;
                     }
                     if (!arrayIsEqualTo(oldSourceFile.moduleAugmentations, newSourceFile.moduleAugmentations, moduleNameIsEqualTo)) {
                         // moduleAugmentations has changed
-                        return false;
+                        oldProgram.structureIsReused = StructureIsReused.SafeModules;
                     }
 
                     if (!arrayIsEqualTo(oldSourceFile.typeReferenceDirectives, newSourceFile.typeReferenceDirectives, fileReferenceIsEqualTo)) {
                         // 'types' references has changed
-                        return false;
+                        oldProgram.structureIsReused = StructureIsReused.SafeModules;
                     }
 
-                    const newSourceFilePath = getNormalizedAbsolutePath(newSourceFile.fileName, currentDirectory);
-                    if (resolveModuleNamesWorker) {
-                        const moduleNames = map(concatenate(newSourceFile.imports, newSourceFile.moduleAugmentations), getTextOfLiteral);
-                        const resolutions = resolveModuleNamesWorker(moduleNames, newSourceFilePath);
-                        // ensure that module resolution results are still correct
-                        const resolutionsChanged = hasChangesInResolutions(moduleNames, resolutions, oldSourceFile.resolvedModules, moduleResolutionIsEqualTo);
-                        if (resolutionsChanged) {
-                            return false;
-                        }
+                    // tentatively approve the file
+                    modifiedSourceFiles.push({ oldFile: oldSourceFile, newFile: newSourceFile });
+                }
+
+                // if file has passed all checks it should be safe to reuse it
+                newSourceFiles.push(newSourceFile);
+            }
+
+            if (oldProgram.structureIsReused !== StructureIsReused.Completely) {
+                return oldProgram.structureIsReused;
+            }
+
+            modifiedFilePaths = modifiedSourceFiles.map(f => f.newFile.path);
+            // try to verify results of module resolution
+            for (const { oldFile: oldSourceFile, newFile: newSourceFile } of modifiedSourceFiles) {
+                const newSourceFilePath = getNormalizedAbsolutePath(newSourceFile.fileName, currentDirectory);
+                if (resolveModuleNamesWorker) {
+                    const moduleNames = map(concatenate(newSourceFile.imports, newSourceFile.moduleAugmentations), getTextOfLiteral);
+                    const oldProgramState = { program: oldProgram, file: oldSourceFile, modifiedFilePaths };
+                    const resolutions = resolveModuleNamesReusingOldState(moduleNames, newSourceFilePath, newSourceFile, oldProgramState);
+                    // ensure that module resolution results are still correct
+                    const resolutionsChanged = hasChangesInResolutions(moduleNames, resolutions, oldSourceFile.resolvedModules, moduleResolutionIsEqualTo);
+                    if (resolutionsChanged) {
+                        oldProgram.structureIsReused = StructureIsReused.SafeModules;
+                        newSourceFile.resolvedModules = zipToMap(moduleNames, resolutions);
                     }
-                    if (resolveTypeReferenceDirectiveNamesWorker) {
-                        const typesReferenceDirectives = map(newSourceFile.typeReferenceDirectives, x => x.fileName);
-                        const resolutions = resolveTypeReferenceDirectiveNamesWorker(typesReferenceDirectives, newSourceFilePath);
-                        // ensure that types resolutions are still correct
-                        const resolutionsChanged = hasChangesInResolutions(typesReferenceDirectives, resolutions, oldSourceFile.resolvedTypeReferenceDirectiveNames, typeDirectiveIsEqualTo);
-                        if (resolutionsChanged) {
-                            return false;
-                        }
+                    else {
+                        newSourceFile.resolvedModules = oldSourceFile.resolvedModules;
                     }
-                    // pass the cache of module/types resolutions from the old source file
-                    newSourceFile.resolvedModules = oldSourceFile.resolvedModules;
-                    newSourceFile.resolvedTypeReferenceDirectiveNames = oldSourceFile.resolvedTypeReferenceDirectiveNames;
-                    modifiedSourceFiles.push(newSourceFile);
                 }
-                else {
-                    // file has no changes - use it as is
-                    newSourceFile = oldSourceFile;
+                if (resolveTypeReferenceDirectiveNamesWorker) {
+                    const typesReferenceDirectives = map(newSourceFile.typeReferenceDirectives, x => x.fileName);
+                    const resolutions = resolveTypeReferenceDirectiveNamesWorker(typesReferenceDirectives, newSourceFilePath);
+                    // ensure that types resolutions are still correct
+                    const resolutionsChanged = hasChangesInResolutions(typesReferenceDirectives, resolutions, oldSourceFile.resolvedTypeReferenceDirectiveNames, typeDirectiveIsEqualTo);
+                    if (resolutionsChanged) {
+                        oldProgram.structureIsReused = StructureIsReused.SafeModules;
+                        newSourceFile.resolvedTypeReferenceDirectiveNames = zipToMap(typesReferenceDirectives, resolutions);
+                    }
+                    else {
+                        newSourceFile.resolvedTypeReferenceDirectiveNames = oldSourceFile.resolvedTypeReferenceDirectiveNames;
+                    }
                 }
+            }
 
-                // if file has passed all checks it should be safe to reuse it
-                newSourceFiles.push(newSourceFile);
+            if (oldProgram.structureIsReused !== StructureIsReused.Completely) {
+                return oldProgram.structureIsReused;
             }
 
             // update fileName -> file mapping
-            for (let i = 0, len = newSourceFiles.length; i < len; i++) {
+            for (let i = 0; i < newSourceFiles.length; i++) {
                 filesByName.set(filePaths[i], newSourceFiles[i]);
             }
 
@@ -579,12 +867,11 @@ namespace ts {
             fileProcessingDiagnostics = oldProgram.getFileProcessingDiagnostics();
 
             for (const modifiedFile of modifiedSourceFiles) {
-                fileProcessingDiagnostics.reattachFileDiagnostics(modifiedFile);
+                fileProcessingDiagnostics.reattachFileDiagnostics(modifiedFile.newFile);
             }
             resolvedTypeReferenceDirectives = oldProgram.getResolvedTypeReferenceDirectives();
-            oldProgram.structureIsReused = true;
 
-            return true;
+            return oldProgram.structureIsReused = StructureIsReused.Completely;
         }
 
         function getEmitHost(writeFileCallback?: WriteFileCallback): EmitHost {
@@ -597,13 +884,17 @@ namespace ts {
                 getSourceFile: program.getSourceFile,
                 getSourceFileByPath: program.getSourceFileByPath,
                 getSourceFiles: program.getSourceFiles,
-                isSourceFileFromExternalLibrary: (file: SourceFile) => !!sourceFilesFoundSearchingNodeModules[file.path],
+                isSourceFileFromExternalLibrary,
                 writeFile: writeFileCallback || (
                     (fileName, data, writeByteOrderMark, onError, sourceFiles) => host.writeFile(fileName, data, writeByteOrderMark, onError, sourceFiles)),
                 isEmitBlocked,
             };
         }
 
+        function isSourceFileFromExternalLibrary(file: SourceFile): boolean {
+            return sourceFilesFoundSearchingNodeModules.get(file.path);
+        }
+
         function getDiagnosticsProducingTypeChecker() {
             return diagnosticsProducingTypeChecker || (diagnosticsProducingTypeChecker = createTypeChecker(program, /*produceDiagnostics:*/ true));
         }
@@ -616,15 +907,15 @@ namespace ts {
             return noDiagnosticsTypeChecker || (noDiagnosticsTypeChecker = createTypeChecker(program, /*produceDiagnostics:*/ false));
         }
 
-        function emit(sourceFile?: SourceFile, writeFileCallback?: WriteFileCallback, cancellationToken?: CancellationToken, emitOnlyDtsFiles?: boolean): EmitResult {
-            return runWithCancellationToken(() => emitWorker(program, sourceFile, writeFileCallback, cancellationToken, emitOnlyDtsFiles));
+        function emit(sourceFile?: SourceFile, writeFileCallback?: WriteFileCallback, cancellationToken?: CancellationToken, emitOnlyDtsFiles?: boolean, transformers?: CustomTransformers): EmitResult {
+            return runWithCancellationToken(() => emitWorker(program, sourceFile, writeFileCallback, cancellationToken, emitOnlyDtsFiles, transformers));
         }
 
         function isEmitBlocked(emitFileName: string): boolean {
             return hasEmitBlockingDiagnostics.contains(toPath(emitFileName, currentDirectory, getCanonicalFileName));
         }
 
-        function emitWorker(program: Program, sourceFile: SourceFile, writeFileCallback: WriteFileCallback, cancellationToken: CancellationToken, emitOnlyDtsFiles?: boolean): EmitResult {
+        function emitWorker(program: Program, sourceFile: SourceFile, writeFileCallback: WriteFileCallback, cancellationToken: CancellationToken, emitOnlyDtsFiles?: boolean, customTransformers?: CustomTransformers): EmitResult {
             let declarationDiagnostics: Diagnostic[] = [];
 
             if (options.noEmit) {
@@ -666,11 +957,13 @@ namespace ts {
 
             performance.mark("beforeEmit");
 
+            const transformers = emitOnlyDtsFiles ? [] : getTransformers(options, customTransformers);
             const emitResult = emitFiles(
                 emitResolver,
                 getEmitHost(writeFileCallback),
                 sourceFile,
-                emitOnlyDtsFiles);
+                emitOnlyDtsFiles,
+                transformers);
 
             performance.mark("afterEmit");
             performance.measure("Emit", "beforeEmit", "afterEmit");
@@ -692,16 +985,12 @@ namespace ts {
             if (sourceFile) {
                 return getDiagnostics(sourceFile, cancellationToken);
             }
-
-            const allDiagnostics: Diagnostic[] = [];
-            forEach(program.getSourceFiles(), sourceFile => {
+            return sortAndDeduplicateDiagnostics(flatMap(program.getSourceFiles(), sourceFile => {
                 if (cancellationToken) {
                     cancellationToken.throwIfCancellationRequested();
                 }
-                addRange(allDiagnostics, getDiagnostics(sourceFile, cancellationToken));
-            });
-
-            return sortAndDeduplicateDiagnostics(allDiagnostics);
+                return getDiagnostics(sourceFile, cancellationToken);
+            }));
         }
 
         function getSyntacticDiagnostics(sourceFile: SourceFile, cancellationToken: CancellationToken): Diagnostic[] {
@@ -723,7 +1012,18 @@ namespace ts {
             }
         }
 
-        function getSyntacticDiagnosticsForFile(sourceFile: SourceFile, cancellationToken: CancellationToken): Diagnostic[] {
+        function getSyntacticDiagnosticsForFile(sourceFile: SourceFile): Diagnostic[] {
+            // For JavaScript files, we report semantic errors for using TypeScript-only
+            // constructs from within a JavaScript file as syntactic errors.
+            if (isSourceFileJavaScript(sourceFile)) {
+                if (!sourceFile.additionalSyntacticDiagnostics) {
+                    sourceFile.additionalSyntacticDiagnostics = getJavaScriptSyntacticDiagnosticsForFile(sourceFile);
+                    if (isCheckJsEnabledForFile(sourceFile, options)) {
+                        sourceFile.additionalSyntacticDiagnostics = concatenate(sourceFile.additionalSyntacticDiagnostics, sourceFile.jsDocDiagnostics);
+                    }
+                }
+                return concatenate(sourceFile.additionalSyntacticDiagnostics, sourceFile.parseDiagnostics);
+            }
             return sourceFile.parseDiagnostics;
         }
 
@@ -751,69 +1051,145 @@ namespace ts {
         }
 
         function getSemanticDiagnosticsForFile(sourceFile: SourceFile, cancellationToken: CancellationToken): Diagnostic[] {
+            return getAndCacheDiagnostics(sourceFile, cancellationToken, cachedSemanticDiagnosticsForFile, getSemanticDiagnosticsForFileNoCache);
+        }
+
+        function getSemanticDiagnosticsForFileNoCache(sourceFile: SourceFile, cancellationToken: CancellationToken): Diagnostic[] {
             return runWithCancellationToken(() => {
+                // If skipLibCheck is enabled, skip reporting errors if file is a declaration file.
+                // If skipDefaultLibCheck is enabled, skip reporting errors if file contains a
+                // '/// <reference no-default-lib="true"/>' directive.
+                if (options.skipLibCheck && sourceFile.isDeclarationFile || options.skipDefaultLibCheck && sourceFile.hasNoDefaultLib) {
+                    return emptyArray;
+                }
+
                 const typeChecker = getDiagnosticsProducingTypeChecker();
 
                 Debug.assert(!!sourceFile.bindDiagnostics);
-                const bindDiagnostics = sourceFile.bindDiagnostics;
-                // For JavaScript files, we don't want to report the normal typescript semantic errors.
-                // Instead, we just report errors for using TypeScript-only constructs from within a
-                // JavaScript file.
-                const checkDiagnostics = isSourceFileJavaScript(sourceFile) ?
-                    getJavaScriptSemanticDiagnosticsForFile(sourceFile, cancellationToken) :
-                    typeChecker.getDiagnostics(sourceFile, cancellationToken);
+                // For JavaScript files, we don't want to report semantic errors unless explicitly requested.
+                const includeBindAndCheckDiagnostics = !isSourceFileJavaScript(sourceFile) || isCheckJsEnabledForFile(sourceFile, options);
+                const bindDiagnostics = includeBindAndCheckDiagnostics ? sourceFile.bindDiagnostics : emptyArray;
+                const checkDiagnostics = includeBindAndCheckDiagnostics ? typeChecker.getDiagnostics(sourceFile, cancellationToken) : emptyArray;
                 const fileProcessingDiagnosticsInFile = fileProcessingDiagnostics.getDiagnostics(sourceFile.fileName);
                 const programDiagnosticsInFile = programDiagnostics.getDiagnostics(sourceFile.fileName);
 
-                return bindDiagnostics.concat(checkDiagnostics).concat(fileProcessingDiagnosticsInFile).concat(programDiagnosticsInFile);
+                const diagnostics = bindDiagnostics.concat(checkDiagnostics, fileProcessingDiagnosticsInFile, programDiagnosticsInFile);
+                return isSourceFileJavaScript(sourceFile)
+                    ? filter(diagnostics, shouldReportDiagnostic)
+                    : diagnostics;
             });
         }
 
-        function getJavaScriptSemanticDiagnosticsForFile(sourceFile: SourceFile, cancellationToken: CancellationToken): Diagnostic[] {
+        /**
+         * Skip errors if previous line start with '// @ts-ignore' comment, not counting non-empty non-comment lines
+         */
+        function shouldReportDiagnostic(diagnostic: Diagnostic) {
+            const { file, start } = diagnostic;
+            if (file) {
+                const lineStarts = getLineStarts(file);
+                let { line } = computeLineAndCharacterOfPosition(lineStarts, start);
+                while (line > 0) {
+                    const previousLineText = file.text.slice(lineStarts[line - 1], lineStarts[line]);
+                    const result = ignoreDiagnosticCommentRegEx.exec(previousLineText);
+                    if (!result) {
+                        // non-empty line
+                        return true;
+                    }
+                    if (result[3]) {
+                        // @ts-ignore
+                        return false;
+                    }
+                    line--;
+                }
+            }
+            return true;
+        }
+
+        function getJavaScriptSyntacticDiagnosticsForFile(sourceFile: SourceFile): Diagnostic[] {
             return runWithCancellationToken(() => {
                 const diagnostics: Diagnostic[] = [];
+                let parent: Node = sourceFile;
                 walk(sourceFile);
 
                 return diagnostics;
 
-                function walk(node: Node): boolean {
-                    if (!node) {
-                        return false;
+                function walk(node: Node) {
+                    // Return directly from the case if the given node doesnt want to visit each child
+                    // Otherwise break to visit each child
+
+                    switch (parent.kind) {
+                        case SyntaxKind.Parameter:
+                        case SyntaxKind.PropertyDeclaration:
+                            if ((<ParameterDeclaration | PropertyDeclaration>parent).questionToken === node) {
+                                diagnostics.push(createDiagnosticForNode(node, Diagnostics._0_can_only_be_used_in_a_ts_file, "?"));
+                                return;
+                            }
+                            // falls through
+                        case SyntaxKind.MethodDeclaration:
+                        case SyntaxKind.MethodSignature:
+                        case SyntaxKind.Constructor:
+                        case SyntaxKind.GetAccessor:
+                        case SyntaxKind.SetAccessor:
+                        case SyntaxKind.FunctionExpression:
+                        case SyntaxKind.FunctionDeclaration:
+                        case SyntaxKind.ArrowFunction:
+                        case SyntaxKind.FunctionDeclaration:
+                        case SyntaxKind.VariableDeclaration:
+                            // type annotation
+                            if ((<FunctionLikeDeclaration | VariableDeclaration | ParameterDeclaration | PropertyDeclaration>parent).type === node) {
+                                diagnostics.push(createDiagnosticForNode(node, Diagnostics.types_can_only_be_used_in_a_ts_file));
+                                return;
+                            }
                     }
 
                     switch (node.kind) {
                         case SyntaxKind.ImportEqualsDeclaration:
                             diagnostics.push(createDiagnosticForNode(node, Diagnostics.import_can_only_be_used_in_a_ts_file));
-                            return true;
+                            return;
                         case SyntaxKind.ExportAssignment:
                             if ((<ExportAssignment>node).isExportEquals) {
                                 diagnostics.push(createDiagnosticForNode(node, Diagnostics.export_can_only_be_used_in_a_ts_file));
-                                return true;
-                            }
-                            break;
-                        case SyntaxKind.ClassDeclaration:
-                            let classDeclaration = <ClassDeclaration>node;
-                            if (checkModifiers(classDeclaration.modifiers) ||
-                                checkTypeParameters(classDeclaration.typeParameters)) {
-                                return true;
+                                return;
                             }
                             break;
                         case SyntaxKind.HeritageClause:
-                            let heritageClause = <HeritageClause>node;
+                            const heritageClause = <HeritageClause>node;
                             if (heritageClause.token === SyntaxKind.ImplementsKeyword) {
                                 diagnostics.push(createDiagnosticForNode(node, Diagnostics.implements_clauses_can_only_be_used_in_a_ts_file));
-                                return true;
+                                return;
                             }
                             break;
                         case SyntaxKind.InterfaceDeclaration:
                             diagnostics.push(createDiagnosticForNode(node, Diagnostics.interface_declarations_can_only_be_used_in_a_ts_file));
-                            return true;
+                            return;
                         case SyntaxKind.ModuleDeclaration:
                             diagnostics.push(createDiagnosticForNode(node, Diagnostics.module_declarations_can_only_be_used_in_a_ts_file));
-                            return true;
+                            return;
                         case SyntaxKind.TypeAliasDeclaration:
                             diagnostics.push(createDiagnosticForNode(node, Diagnostics.type_aliases_can_only_be_used_in_a_ts_file));
-                            return true;
+                            return;
+                        case SyntaxKind.EnumDeclaration:
+                            diagnostics.push(createDiagnosticForNode(node, Diagnostics.enum_declarations_can_only_be_used_in_a_ts_file));
+                            return;
+                        case SyntaxKind.TypeAssertionExpression:
+                            const typeAssertionExpression = <TypeAssertion>node;
+                            diagnostics.push(createDiagnosticForNode(typeAssertionExpression.type, Diagnostics.type_assertion_expressions_can_only_be_used_in_a_ts_file));
+                            return;
+                    }
+
+                    const prevParent = parent;
+                    parent = node;
+                    forEachChild(node, walk, walkArray);
+                    parent = prevParent;
+                }
+
+                function walkArray(nodes: NodeArray<Node>) {
+                    if (parent.decorators === nodes && !options.experimentalDecorators) {
+                        diagnostics.push(createDiagnosticForNode(parent, Diagnostics.Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning));
+                    }
+
+                    switch (parent.kind) {
+                        case SyntaxKind.ClassDeclaration:
                         case SyntaxKind.MethodDeclaration:
                         case SyntaxKind.MethodSignature:
                         case SyntaxKind.Constructor:
@@ -823,160 +1199,149 @@ namespace ts {
                         case SyntaxKind.FunctionDeclaration:
                         case SyntaxKind.ArrowFunction:
                         case SyntaxKind.FunctionDeclaration:
-                            const functionDeclaration = <FunctionLikeDeclaration>node;
-                            if (checkModifiers(functionDeclaration.modifiers) ||
-                                checkTypeParameters(functionDeclaration.typeParameters) ||
-                                checkTypeAnnotation(functionDeclaration.type)) {
-                                return true;
+                            // Check type parameters
+                            if (nodes === (<ClassDeclaration | FunctionLikeDeclaration>parent).typeParameters) {
+                                diagnostics.push(createDiagnosticForNodeArray(nodes, Diagnostics.type_parameter_declarations_can_only_be_used_in_a_ts_file));
+                                return;
                             }
-                            break;
+                            // falls through
                         case SyntaxKind.VariableStatement:
-                            const variableStatement = <VariableStatement>node;
-                            if (checkModifiers(variableStatement.modifiers)) {
-                                return true;
-                            }
-                            break;
-                        case SyntaxKind.VariableDeclaration:
-                            const variableDeclaration = <VariableDeclaration>node;
-                            if (checkTypeAnnotation(variableDeclaration.type)) {
-                                return true;
-                            }
-                            break;
-                        case SyntaxKind.CallExpression:
-                        case SyntaxKind.NewExpression:
-                            const expression = <CallExpression>node;
-                            if (expression.typeArguments && expression.typeArguments.length > 0) {
-                                const start = expression.typeArguments.pos;
-                                diagnostics.push(createFileDiagnostic(sourceFile, start, expression.typeArguments.end - start,
-                                    Diagnostics.type_arguments_can_only_be_used_in_a_ts_file));
-                                return true;
-                            }
-                            break;
-                        case SyntaxKind.Parameter:
-                            const parameter = <ParameterDeclaration>node;
-                            if (parameter.modifiers) {
-                                const start = parameter.modifiers.pos;
-                                diagnostics.push(createFileDiagnostic(sourceFile, start, parameter.modifiers.end - start,
-                                    Diagnostics.parameter_modifiers_can_only_be_used_in_a_ts_file));
-                                return true;
-                            }
-                            if (parameter.questionToken) {
-                                diagnostics.push(createDiagnosticForNode(parameter.questionToken, Diagnostics._0_can_only_be_used_in_a_ts_file, "?"));
-                                return true;
-                            }
-                            if (parameter.type) {
-                                diagnostics.push(createDiagnosticForNode(parameter.type, Diagnostics.types_can_only_be_used_in_a_ts_file));
-                                return true;
+                            // Check modifiers
+                            if (nodes === (<ClassDeclaration | FunctionLikeDeclaration | VariableStatement>parent).modifiers) {
+                                return checkModifiers(<NodeArray<Modifier>>nodes, parent.kind === SyntaxKind.VariableStatement);
                             }
                             break;
                         case SyntaxKind.PropertyDeclaration:
-                            const propertyDeclaration = <PropertyDeclaration>node;
-                            if (propertyDeclaration.modifiers) {
-                                for (const modifier of propertyDeclaration.modifiers) {
+                            // Check modifiers of property declaration
+                            if (nodes === (<PropertyDeclaration>parent).modifiers) {
+                                for (const modifier of <NodeArray<Modifier>>nodes) {
                                     if (modifier.kind !== SyntaxKind.StaticKeyword) {
                                         diagnostics.push(createDiagnosticForNode(modifier, Diagnostics._0_can_only_be_used_in_a_ts_file, tokenToString(modifier.kind)));
-                                        return true;
                                     }
                                 }
+                                return;
                             }
-                            if (checkTypeAnnotation((<PropertyDeclaration>node).type)) {
-                                return true;
+                            break;
+                        case SyntaxKind.Parameter:
+                            // Check modifiers of parameter declaration
+                            if (nodes === (<ParameterDeclaration>parent).modifiers) {
+                                diagnostics.push(createDiagnosticForNodeArray(nodes, Diagnostics.parameter_modifiers_can_only_be_used_in_a_ts_file));
+                                return;
                             }
                             break;
-                        case SyntaxKind.EnumDeclaration:
-                            diagnostics.push(createDiagnosticForNode(node, Diagnostics.enum_declarations_can_only_be_used_in_a_ts_file));
-                            return true;
-                        case SyntaxKind.TypeAssertionExpression:
-                            let typeAssertionExpression = <TypeAssertion>node;
-                            diagnostics.push(createDiagnosticForNode(typeAssertionExpression.type, Diagnostics.type_assertion_expressions_can_only_be_used_in_a_ts_file));
-                            return true;
-                        case SyntaxKind.Decorator:
-                            if (!options.experimentalDecorators) {
-                                diagnostics.push(createDiagnosticForNode(node, Diagnostics.Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning));
+                        case SyntaxKind.CallExpression:
+                        case SyntaxKind.NewExpression:
+                        case SyntaxKind.ExpressionWithTypeArguments:
+                            // Check type arguments
+                            if (nodes === (<CallExpression | NewExpression | ExpressionWithTypeArguments>parent).typeArguments) {
+                                diagnostics.push(createDiagnosticForNodeArray(nodes, Diagnostics.type_arguments_can_only_be_used_in_a_ts_file));
+                                return;
                             }
-                            return true;
+                            break;
                     }
 
-                    return forEachChild(node, walk);
-                }
-
-                function checkTypeParameters(typeParameters: NodeArray<TypeParameterDeclaration>): boolean {
-                    if (typeParameters) {
-                        const start = typeParameters.pos;
-                        diagnostics.push(createFileDiagnostic(sourceFile, start, typeParameters.end - start, Diagnostics.type_parameter_declarations_can_only_be_used_in_a_ts_file));
-                        return true;
+                    for (const node of nodes) {
+                        walk(node);
                     }
-                    return false;
                 }
 
-                function checkTypeAnnotation(type: TypeNode): boolean {
-                    if (type) {
-                        diagnostics.push(createDiagnosticForNode(type, Diagnostics.types_can_only_be_used_in_a_ts_file));
-                        return true;
+                function checkModifiers(modifiers: NodeArray<Modifier>, isConstValid: boolean) {
+                    for (const modifier of modifiers) {
+                        switch (modifier.kind) {
+                            case SyntaxKind.ConstKeyword:
+                                if (isConstValid) {
+                                    continue;
+                                }
+                                // to report error,
+                                // falls through
+                            case SyntaxKind.PublicKeyword:
+                            case SyntaxKind.PrivateKeyword:
+                            case SyntaxKind.ProtectedKeyword:
+                            case SyntaxKind.ReadonlyKeyword:
+                            case SyntaxKind.DeclareKeyword:
+                            case SyntaxKind.AbstractKeyword:
+                                diagnostics.push(createDiagnosticForNode(modifier, Diagnostics._0_can_only_be_used_in_a_ts_file, tokenToString(modifier.kind)));
+                                break;
+
+                            // These are all legal modifiers.
+                            case SyntaxKind.StaticKeyword:
+                            case SyntaxKind.ExportKeyword:
+                            case SyntaxKind.DefaultKeyword:
+                        }
                     }
-
-                    return false;
                 }
 
-                function checkModifiers(modifiers: NodeArray<Modifier>): boolean {
-                    if (modifiers) {
-                        for (const modifier of modifiers) {
-                            switch (modifier.kind) {
-                                case SyntaxKind.PublicKeyword:
-                                case SyntaxKind.PrivateKeyword:
-                                case SyntaxKind.ProtectedKeyword:
-                                case SyntaxKind.ReadonlyKeyword:
-                                case SyntaxKind.DeclareKeyword:
-                                    diagnostics.push(createDiagnosticForNode(modifier, Diagnostics._0_can_only_be_used_in_a_ts_file, tokenToString(modifier.kind)));
-                                    return true;
-
-                                // These are all legal modifiers.
-                                case SyntaxKind.StaticKeyword:
-                                case SyntaxKind.ExportKeyword:
-                                case SyntaxKind.ConstKeyword:
-                                case SyntaxKind.DefaultKeyword:
-                                case SyntaxKind.AbstractKeyword:
-                            }
-                        }
-                    }
+                function createDiagnosticForNodeArray(nodes: NodeArray<Node>, message: DiagnosticMessage, arg0?: string | number, arg1?: string | number, arg2?: string | number): Diagnostic {
+                    const start = nodes.pos;
+                    return createFileDiagnostic(sourceFile, start, nodes.end - start, message, arg0, arg1, arg2);
+                }
 
-                    return false;
+                // Since these are syntactic diagnostics, parent might not have been set
+                // this means the sourceFile cannot be infered from the node
+                function createDiagnosticForNode(node: Node, message: DiagnosticMessage, arg0?: string | number, arg1?: string | number, arg2?: string | number): Diagnostic {
+                    return createDiagnosticForNodeInSourceFile(sourceFile, node, message, arg0, arg1, arg2);
                 }
             });
         }
 
-        function getDeclarationDiagnosticsWorker(sourceFile: SourceFile, cancellationToken: CancellationToken): Diagnostic[] {
+        function getDeclarationDiagnosticsWorker(sourceFile: SourceFile | undefined, cancellationToken: CancellationToken): Diagnostic[] {
+            return getAndCacheDiagnostics(sourceFile, cancellationToken, cachedDeclarationDiagnosticsForFile, getDeclarationDiagnosticsForFileNoCache);
+        }
+
+        function getDeclarationDiagnosticsForFileNoCache(sourceFile: SourceFile | undefined, cancellationToken: CancellationToken) {
             return runWithCancellationToken(() => {
                 const resolver = getDiagnosticsProducingTypeChecker().getEmitResolver(sourceFile, cancellationToken);
                 // Don't actually write any files since we're just getting diagnostics.
-                const writeFile: WriteFileCallback = () => { };
-                return ts.getDeclarationDiagnostics(getEmitHost(writeFile), resolver, sourceFile);
+                return ts.getDeclarationDiagnostics(getEmitHost(noop), resolver, sourceFile);
             });
         }
 
+        function getAndCacheDiagnostics(
+            sourceFile: SourceFile | undefined,
+            cancellationToken: CancellationToken,
+            cache: DiagnosticCache,
+            getDiagnostics: (sourceFile: SourceFile, cancellationToken: CancellationToken) => Diagnostic[]) {
+
+            const cachedResult = sourceFile
+                ? cache.perFile && cache.perFile.get(sourceFile.path)
+                : cache.allDiagnostics;
+
+            if (cachedResult) {
+                return cachedResult;
+            }
+            const result = getDiagnostics(sourceFile, cancellationToken) || emptyArray;
+            if (sourceFile) {
+                if (!cache.perFile) {
+                    cache.perFile = createFileMap<Diagnostic[]>();
+                }
+                cache.perFile.set(sourceFile.path, result);
+            }
+            else {
+                cache.allDiagnostics = result;
+            }
+            return result;
+        }
+
         function getDeclarationDiagnosticsForFile(sourceFile: SourceFile, cancellationToken: CancellationToken): Diagnostic[] {
-            return isDeclarationFile(sourceFile) ? [] : getDeclarationDiagnosticsWorker(sourceFile, cancellationToken);
+            return sourceFile.isDeclarationFile ? [] : getDeclarationDiagnosticsWorker(sourceFile, cancellationToken);
         }
 
         function getOptionsDiagnostics(): Diagnostic[] {
-            const allDiagnostics: Diagnostic[] = [];
-            addRange(allDiagnostics, fileProcessingDiagnostics.getGlobalDiagnostics());
-            addRange(allDiagnostics, programDiagnostics.getGlobalDiagnostics());
-            return sortAndDeduplicateDiagnostics(allDiagnostics);
+            return sortAndDeduplicateDiagnostics(concatenate(
+                fileProcessingDiagnostics.getGlobalDiagnostics(),
+                concatenate(
+                    programDiagnostics.getGlobalDiagnostics(),
+                    options.configFile ? programDiagnostics.getDiagnostics(options.configFile.fileName) : []
+                )
+            ));
         }
 
         function getGlobalDiagnostics(): Diagnostic[] {
-            const allDiagnostics: Diagnostic[] = [];
-            addRange(allDiagnostics, getDiagnosticsProducingTypeChecker().getGlobalDiagnostics());
-            return sortAndDeduplicateDiagnostics(allDiagnostics);
-        }
-
-        function hasExtension(fileName: string): boolean {
-            return getBaseFileName(fileName).indexOf(".") >= 0;
+            return sortAndDeduplicateDiagnostics(getDiagnosticsProducingTypeChecker().getGlobalDiagnostics().slice());
         }
 
         function processRootFile(fileName: string, isDefaultLib: boolean) {
-            processSourceFile(normalizePath(fileName), isDefaultLib, /*isReference*/ true);
+            processSourceFile(normalizePath(fileName), isDefaultLib);
         }
 
         function fileReferenceIsEqualTo(a: FileReference, b: FileReference): boolean {
@@ -999,29 +1364,34 @@ namespace ts {
             const isJavaScriptFile = isSourceFileJavaScript(file);
             const isExternalModuleFile = isExternalModule(file);
 
+            // file.imports may not be undefined if there exists dynamic import
             let imports: LiteralExpression[];
             let moduleAugmentations: LiteralExpression[];
+            let ambientModules: string[];
 
             // If we are importing helpers, we need to add a synthetic reference to resolve the
             // helpers library.
             if (options.importHelpers
                 && (options.isolatedModules || isExternalModuleFile)
                 && !file.isDeclarationFile) {
-                const externalHelpersModuleReference = <StringLiteral>createNode(SyntaxKind.StringLiteral);
-                externalHelpersModuleReference.text = externalHelpersModuleNameText;
-                externalHelpersModuleReference.parent = file;
+                // synthesize 'import "tslib"' declaration
+                const externalHelpersModuleReference = createLiteral(externalHelpersModuleNameText);
+                const importDecl = createImportDeclaration(/*decorators*/ undefined, /*modifiers*/ undefined, /*importClause*/ undefined);
+                externalHelpersModuleReference.parent = importDecl;
+                importDecl.parent = file;
                 imports = [externalHelpersModuleReference];
             }
 
             for (const node of file.statements) {
                 collectModuleReferences(node, /*inAmbientModule*/ false);
-                if (isJavaScriptFile) {
-                    collectRequireCalls(node);
+                if ((file.flags & NodeFlags.PossiblyContainsDynamicImport) || isJavaScriptFile) {
+                    collectDynamicImportOrRequireCalls(node);
                 }
             }
 
             file.imports = imports || emptyArray;
             file.moduleAugmentations = moduleAugmentations || emptyArray;
+            file.ambientModuleNames = ambientModules || emptyArray;
 
             return;
 
@@ -1030,7 +1400,7 @@ namespace ts {
                     case SyntaxKind.ImportDeclaration:
                     case SyntaxKind.ImportEqualsDeclaration:
                     case SyntaxKind.ExportDeclaration:
-                        let moduleNameExpr = getExternalModuleName(node);
+                        const moduleNameExpr = getExternalModuleName(node);
                         if (!moduleNameExpr || moduleNameExpr.kind !== SyntaxKind.StringLiteral) {
                             break;
                         }
@@ -1046,7 +1416,7 @@ namespace ts {
                         }
                         break;
                     case SyntaxKind.ModuleDeclaration:
-                        if (isAmbientModule(<ModuleDeclaration>node) && (inAmbientModule || hasModifier(node, ModifierFlags.Ambient) || isDeclarationFile(file))) {
+                        if (isAmbientModule(<ModuleDeclaration>node) && (inAmbientModule || hasModifier(node, ModifierFlags.Ambient) || file.isDeclarationFile)) {
                             const moduleName = <LiteralExpression>(<ModuleDeclaration>node).name;
                             // Ambient module declarations can be interpreted as augmentations for some existing external modules.
                             // This will happen in two cases:
@@ -1057,6 +1427,10 @@ namespace ts {
                                 (moduleAugmentations || (moduleAugmentations = [])).push(moduleName);
                             }
                             else if (!inAmbientModule) {
+                                if (file.isDeclarationFile) {
+                                    // for global .d.ts files record name of ambient module
+                                    (ambientModules || (ambientModules = [])).push(moduleName.text);
+                                }
                                 // An AmbientExternalModuleDeclaration declares an external module.
                                 // This type of declaration is permitted only in the global module.
                                 // The StringLiteral must specify a top - level external module name.
@@ -1074,61 +1448,75 @@ namespace ts {
                 }
             }
 
-            function collectRequireCalls(node: Node): void {
-                if (isRequireCall(node, /*checkArgumentIsStringLiteral*/true)) {
+            function collectDynamicImportOrRequireCalls(node: Node): void {
+                if (isRequireCall(node, /*checkArgumentIsStringLiteral*/ true)) {
+                    (imports || (imports = [])).push(<StringLiteral>(<CallExpression>node).arguments[0]);
+                }
+                // we have to check the argument list has length of 1. We will still have to process these even though we have parsing error.
+                else if (isImportCall(node) && node.arguments.length === 1 && node.arguments[0].kind === SyntaxKind.StringLiteral) {
                     (imports || (imports = [])).push(<StringLiteral>(<CallExpression>node).arguments[0]);
                 }
                 else {
-                    forEachChild(node, collectRequireCalls);
+                    forEachChild(node, collectDynamicImportOrRequireCalls);
                 }
             }
         }
 
-        /**
-          * 'isReference' indicates whether the file was brought in via a reference directive (rather than an import declaration)
-          */
-        function processSourceFile(fileName: string, isDefaultLib: boolean, isReference: boolean, refFile?: SourceFile, refPos?: number, refEnd?: number) {
-            let diagnosticArgument: string[];
-            let diagnostic: DiagnosticMessage;
+        /** This should have similar behavior to 'processSourceFile' without diagnostics or mutation. */
+        function getSourceFileFromReference(referencingFile: SourceFile, ref: FileReference): SourceFile | undefined {
+            return getSourceFileFromReferenceWorker(resolveTripleslashReference(ref.fileName, referencingFile.fileName), fileName => filesByName.get(toPath(fileName, currentDirectory, getCanonicalFileName)));
+        }
+
+        function getSourceFileFromReferenceWorker(
+                fileName: string,
+                getSourceFile: (fileName: string) => SourceFile | undefined,
+                fail?: (diagnostic: DiagnosticMessage, ...argument: string[]) => void,
+                refFile?: SourceFile): SourceFile | undefined {
+
             if (hasExtension(fileName)) {
                 if (!options.allowNonTsExtensions && !forEach(supportedExtensions, extension => fileExtensionIs(host.getCanonicalFileName(fileName), extension))) {
-                    diagnostic = Diagnostics.File_0_has_unsupported_extension_The_only_supported_extensions_are_1;
-                    diagnosticArgument = [fileName, "'" + supportedExtensions.join("', '") + "'"];
-                }
-                else if (!findSourceFile(fileName, toPath(fileName, currentDirectory, getCanonicalFileName), isDefaultLib, isReference, refFile, refPos, refEnd)) {
-                    diagnostic = Diagnostics.File_0_not_found;
-                    diagnosticArgument = [fileName];
-                }
-                else if (refFile && host.getCanonicalFileName(fileName) === host.getCanonicalFileName(refFile.fileName)) {
-                    diagnostic = Diagnostics.A_file_cannot_have_a_reference_to_itself;
-                    diagnosticArgument = [fileName];
+                    if (fail) fail(Diagnostics.File_0_has_unsupported_extension_The_only_supported_extensions_are_1, fileName, "'" + supportedExtensions.join("', '") + "'");
+                    return undefined;
                 }
-            }
-            else {
-                const nonTsFile: SourceFile = options.allowNonTsExtensions && findSourceFile(fileName, toPath(fileName, currentDirectory, getCanonicalFileName), isDefaultLib, isReference, refFile, refPos, refEnd);
-                if (!nonTsFile) {
-                    if (options.allowNonTsExtensions) {
-                        diagnostic = Diagnostics.File_0_not_found;
-                        diagnosticArgument = [fileName];
+
+                const sourceFile = getSourceFile(fileName);
+                if (fail) {
+                    if (!sourceFile) {
+                        fail(Diagnostics.File_0_not_found, fileName);
                     }
-                    else if (!forEach(supportedExtensions, extension => findSourceFile(fileName + extension, toPath(fileName + extension, currentDirectory, getCanonicalFileName), isDefaultLib, isReference, refFile, refPos, refEnd))) {
-                        diagnostic = Diagnostics.File_0_not_found;
-                        fileName += ".ts";
-                        diagnosticArgument = [fileName];
+                    else if (refFile && host.getCanonicalFileName(fileName) === host.getCanonicalFileName(refFile.fileName)) {
+                        fail(Diagnostics.A_file_cannot_have_a_reference_to_itself, fileName);
                     }
                 }
+                return sourceFile;
             }
+            else {
+                const sourceFileNoExtension = options.allowNonTsExtensions && getSourceFile(fileName);
+                if (sourceFileNoExtension) return sourceFileNoExtension;
 
-            if (diagnostic) {
-                if (refFile !== undefined && refEnd !== undefined && refPos !== undefined) {
-                    fileProcessingDiagnostics.add(createFileDiagnostic(refFile, refPos, refEnd - refPos, diagnostic, ...diagnosticArgument));
-                }
-                else {
-                    fileProcessingDiagnostics.add(createCompilerDiagnostic(diagnostic, ...diagnosticArgument));
+                if (fail && options.allowNonTsExtensions) {
+                    fail(Diagnostics.File_0_not_found, fileName);
+                    return undefined;
                 }
+
+                const sourceFileWithAddedExtension = forEach(supportedExtensions, extension => getSourceFile(fileName + extension));
+                if (fail && !sourceFileWithAddedExtension) fail(Diagnostics.File_0_not_found, fileName + Extension.Ts);
+                return sourceFileWithAddedExtension;
             }
         }
 
+        /** This has side effects through `findSourceFile`. */
+        function processSourceFile(fileName: string, isDefaultLib: boolean, refFile?: SourceFile, refPos?: number, refEnd?: number): void {
+            getSourceFileFromReferenceWorker(fileName,
+                fileName => findSourceFile(fileName, toPath(fileName, currentDirectory, getCanonicalFileName), isDefaultLib, refFile, refPos, refEnd),
+                (diagnostic, ...args) => {
+                    fileProcessingDiagnostics.add(refFile !== undefined && refEnd !== undefined && refPos !== undefined
+                        ? createFileDiagnostic(refFile, refPos, refEnd - refPos, diagnostic, ...args)
+                        : createCompilerDiagnostic(diagnostic, ...args));
+                },
+                refFile);
+        }
+
         function reportFileNamesDifferOnlyInCasingError(fileName: string, existingFileName: string, refFile: SourceFile, refPos: number, refEnd: number): void {
             if (refFile !== undefined && refPos !== undefined && refEnd !== undefined) {
                 fileProcessingDiagnostics.add(createFileDiagnostic(refFile, refPos, refEnd - refPos,
@@ -1140,7 +1528,7 @@ namespace ts {
         }
 
         // Get source file from normalized fileName
-        function findSourceFile(fileName: string, path: Path, isDefaultLib: boolean, isReference: boolean, refFile?: SourceFile, refPos?: number, refEnd?: number): SourceFile {
+        function findSourceFile(fileName: string, path: Path, isDefaultLib: boolean, refFile?: SourceFile, refPos?: number, refEnd?: number): SourceFile {
             if (filesByName.contains(path)) {
                 const file = filesByName.get(path);
                 // try to check if we've already seen this file but with a different casing in path
@@ -1151,21 +1539,21 @@ namespace ts {
 
                 // If the file was previously found via a node_modules search, but is now being processed as a root file,
                 // then everything it sucks in may also be marked incorrectly, and needs to be checked again.
-                if (file && sourceFilesFoundSearchingNodeModules[file.path] && currentNodeModulesDepth == 0) {
-                    sourceFilesFoundSearchingNodeModules[file.path] = false;
+                if (file && sourceFilesFoundSearchingNodeModules.get(file.path) && currentNodeModulesDepth === 0) {
+                    sourceFilesFoundSearchingNodeModules.set(file.path, false);
                     if (!options.noResolve) {
-                        processReferencedFiles(file, getDirectoryPath(fileName), isDefaultLib);
+                        processReferencedFiles(file, isDefaultLib);
                         processTypeReferenceDirectives(file);
                     }
 
-                    modulesWithElidedImports[file.path] = false;
-                    processImportedModules(file, getDirectoryPath(fileName));
+                    modulesWithElidedImports.set(file.path, false);
+                    processImportedModules(file);
                 }
                 // See if we need to reprocess the imports due to prior skipped imports
-                else if (file && modulesWithElidedImports[file.path]) {
-                    if (currentNodeModulesDepth < maxNodeModulesJsDepth) {
-                        modulesWithElidedImports[file.path] = false;
-                        processImportedModules(file, getDirectoryPath(fileName));
+                else if (file && modulesWithElidedImports.get(file.path)) {
+                    if (currentNodeModulesDepth < maxNodeModuleJsDepth) {
+                        modulesWithElidedImports.set(file.path, false);
+                        processImportedModules(file);
                     }
                 }
 
@@ -1185,7 +1573,7 @@ namespace ts {
 
             filesByName.set(path, file);
             if (file) {
-                sourceFilesFoundSearchingNodeModules[path] = (currentNodeModulesDepth > 0);
+                sourceFilesFoundSearchingNodeModules.set(path, currentNodeModulesDepth > 0);
                 file.path = path;
 
                 if (host.useCaseSensitiveFileNames()) {
@@ -1201,14 +1589,13 @@ namespace ts {
 
                 skipDefaultLib = skipDefaultLib || file.hasNoDefaultLib;
 
-                const basePath = getDirectoryPath(fileName);
                 if (!options.noResolve) {
-                    processReferencedFiles(file, basePath, isDefaultLib);
+                    processReferencedFiles(file, isDefaultLib);
                     processTypeReferenceDirectives(file);
                 }
 
                 // always process imported modules to record module name resolutions
-                processImportedModules(file, basePath);
+                processImportedModules(file);
 
                 if (isDefaultLib) {
                     files.unshift(file);
@@ -1221,10 +1608,10 @@ namespace ts {
             return file;
         }
 
-        function processReferencedFiles(file: SourceFile, basePath: string, isDefaultLib: boolean) {
+        function processReferencedFiles(file: SourceFile, isDefaultLib: boolean) {
             forEach(file.referencedFiles, ref => {
                 const referencedFileName = resolveTripleslashReference(ref.fileName, file.fileName);
-                processSourceFile(referencedFileName, isDefaultLib, /*isReference*/ true, file, ref.pos, ref.end);
+                processSourceFile(referencedFileName, isDefaultLib, file, ref.pos, ref.end);
             });
         }
 
@@ -1247,7 +1634,7 @@ namespace ts {
             refFile?: SourceFile, refPos?: number, refEnd?: number): void {
 
             // If we already found this library as a primary reference - nothing to do
-            const previousResolution = resolvedTypeReferenceDirectives[typeReferenceDirective];
+            const previousResolution = resolvedTypeReferenceDirectives.get(typeReferenceDirective);
             if (previousResolution && previousResolution.primary) {
                 return;
             }
@@ -1255,27 +1642,30 @@ namespace ts {
             if (resolvedTypeReferenceDirective) {
                 if (resolvedTypeReferenceDirective.primary) {
                     // resolved from the primary path
-                    processSourceFile(resolvedTypeReferenceDirective.resolvedFileName, /*isDefaultLib*/ false, /*isReference*/ true, refFile, refPos, refEnd);
+                    processSourceFile(resolvedTypeReferenceDirective.resolvedFileName, /*isDefaultLib*/ false, refFile, refPos, refEnd);
                 }
                 else {
                     // If we already resolved to this file, it must have been a secondary reference. Check file contents
                     // for sameness and possibly issue an error
                     if (previousResolution) {
-                        const otherFileText = host.readFile(resolvedTypeReferenceDirective.resolvedFileName);
-                        if (otherFileText !== getSourceFile(previousResolution.resolvedFileName).text) {
-                            fileProcessingDiagnostics.add(createDiagnostic(refFile, refPos, refEnd,
-                                Diagnostics.Conflicting_definitions_for_0_found_at_1_and_2_Consider_installing_a_specific_version_of_this_library_to_resolve_the_conflict,
-                                typeReferenceDirective,
-                                resolvedTypeReferenceDirective.resolvedFileName,
-                                previousResolution.resolvedFileName
-                            ));
+                        // Don't bother reading the file again if it's the same file.
+                        if (resolvedTypeReferenceDirective.resolvedFileName !== previousResolution.resolvedFileName) {
+                            const otherFileText = host.readFile(resolvedTypeReferenceDirective.resolvedFileName);
+                            if (otherFileText !== getSourceFile(previousResolution.resolvedFileName).text) {
+                                fileProcessingDiagnostics.add(createDiagnostic(refFile, refPos, refEnd,
+                                    Diagnostics.Conflicting_definitions_for_0_found_at_1_and_2_Consider_installing_a_specific_version_of_this_library_to_resolve_the_conflict,
+                                    typeReferenceDirective,
+                                    resolvedTypeReferenceDirective.resolvedFileName,
+                                    previousResolution.resolvedFileName
+                                ));
+                            }
                         }
                         // don't overwrite previous resolution result
                         saveResolution = false;
                     }
                     else {
                         // First resolution of this library
-                        processSourceFile(resolvedTypeReferenceDirective.resolvedFileName, /*isDefaultLib*/ false, /*isReference*/ true, refFile, refPos, refEnd);
+                        processSourceFile(resolvedTypeReferenceDirective.resolvedFileName, /*isDefaultLib*/ false, refFile, refPos, refEnd);
                     }
                 }
             }
@@ -1284,7 +1674,7 @@ namespace ts {
             }
 
             if (saveResolution) {
-                resolvedTypeReferenceDirectives[typeReferenceDirective] = resolvedTypeReferenceDirective;
+                resolvedTypeReferenceDirectives.set(typeReferenceDirective, resolvedTypeReferenceDirective);
             }
         }
 
@@ -1301,42 +1691,48 @@ namespace ts {
             return host.getCanonicalFileName(fileName);
         }
 
-        function processImportedModules(file: SourceFile, basePath: string) {
+        function processImportedModules(file: SourceFile) {
             collectExternalModuleReferences(file);
             if (file.imports.length || file.moduleAugmentations.length) {
-                file.resolvedModules = createMap<ResolvedModule>();
-                const moduleNames = map(concatenate(file.imports, file.moduleAugmentations), getTextOfLiteral);
-                const resolutions = resolveModuleNamesWorker(moduleNames, getNormalizedAbsolutePath(file.fileName, currentDirectory));
+                // Because global augmentation doesn't have string literal name, we can check for global augmentation as such.
+                const nonGlobalAugmentation = filter(file.moduleAugmentations, (moduleAugmentation) => moduleAugmentation.kind === SyntaxKind.StringLiteral);
+                const moduleNames = map(concatenate(file.imports, nonGlobalAugmentation), getTextOfLiteral);
+                const oldProgramState = { program: oldProgram, file, modifiedFilePaths };
+                const resolutions = resolveModuleNamesReusingOldState(moduleNames, getNormalizedAbsolutePath(file.fileName, currentDirectory), file, oldProgramState);
+                Debug.assert(resolutions.length === moduleNames.length);
                 for (let i = 0; i < moduleNames.length; i++) {
                     const resolution = resolutions[i];
                     setResolvedModule(file, moduleNames[i], resolution);
-                    const resolvedPath = resolution ? toPath(resolution.resolvedFileName, currentDirectory, getCanonicalFileName) : undefined;
 
-                    // add file to program only if:
-                    // - resolution was successful
-                    // - noResolve is falsy
-                    // - module name comes from the list of imports
-                    // - it's not a top level JavaScript module that exceeded the search max
-                    const isFromNodeModulesSearch = resolution && resolution.isExternalLibraryImport;
-                    const isJsFileFromNodeModules = isFromNodeModulesSearch && hasJavaScriptFileExtension(resolution.resolvedFileName);
+                    if (!resolution) {
+                        continue;
+                    }
+
+                    const isFromNodeModulesSearch = resolution.isExternalLibraryImport;
+                    const isJsFileFromNodeModules = isFromNodeModulesSearch && !extensionIsTypeScript(resolution.extension);
+                    const resolvedFileName = resolution.resolvedFileName;
 
                     if (isFromNodeModulesSearch) {
                         currentNodeModulesDepth++;
                     }
 
-                    const elideImport = isJsFileFromNodeModules && currentNodeModulesDepth > maxNodeModulesJsDepth;
-                    const shouldAddFile = resolution && !options.noResolve && i < file.imports.length && !elideImport;
+                    // add file to program only if:
+                    // - resolution was successful
+                    // - noResolve is falsy
+                    // - module name comes from the list of imports
+                    // - it's not a top level JavaScript module that exceeded the search max
+                    const elideImport = isJsFileFromNodeModules && currentNodeModulesDepth > maxNodeModuleJsDepth;
+                    // Don't add the file if it has a bad extension (e.g. 'tsx' if we don't have '--allowJs')
+                    // This may still end up being an untyped module -- the file won't be included but imports will be allowed.
+                    const shouldAddFile = resolvedFileName && !getResolutionDiagnostic(options, resolution) && !options.noResolve && i < file.imports.length && !elideImport;
 
                     if (elideImport) {
-                        modulesWithElidedImports[file.path] = true;
+                        modulesWithElidedImports.set(file.path, true);
                     }
                     else if (shouldAddFile) {
-                        findSourceFile(resolution.resolvedFileName,
-                                resolvedPath,
-                                /*isDefaultLib*/ false, /*isReference*/ false,
-                                file,
-                                skipTrivia(file.text, file.imports[i].pos),
-                                file.imports[i].end);
+                        const path = toPath(resolvedFileName, currentDirectory, getCanonicalFileName);
+                        const pos = skipTrivia(file.text, file.imports[i].pos);
+                        findSourceFile(resolvedFileName, path, /*isDefaultLib*/ false, file, pos, file.imports[i].end);
                     }
 
                     if (isFromNodeModulesSearch) {
@@ -1348,7 +1744,6 @@ namespace ts {
                 // no imports - drop cached module resolutions
                 file.resolvedModules = undefined;
             }
-            return;
         }
 
         function computeCommonSourceDirectory(sourceFiles: SourceFile[]): string {
@@ -1367,7 +1762,7 @@ namespace ts {
                 const absoluteRootDirectoryPath = host.getCanonicalFileName(getNormalizedAbsolutePath(rootDirectory, currentDirectory));
 
                 for (const sourceFile of sourceFiles) {
-                    if (!isDeclarationFile(sourceFile)) {
+                    if (!sourceFile.isDeclarationFile) {
                         const absoluteSourceFilePath = host.getCanonicalFileName(getNormalizedAbsolutePath(sourceFile.fileName, currentDirectory));
                         if (absoluteSourceFilePath.indexOf(absoluteRootDirectoryPath) !== 0) {
                             programDiagnostics.add(createCompilerDiagnostic(Diagnostics.File_0_is_not_under_rootDir_1_rootDir_is_expected_to_contain_all_source_files, sourceFile.fileName, options.rootDir));
@@ -1383,33 +1778,33 @@ namespace ts {
         function verifyCompilerOptions() {
             if (options.isolatedModules) {
                 if (options.declaration) {
-                    programDiagnostics.add(createCompilerDiagnostic(Diagnostics.Option_0_cannot_be_specified_with_option_1, "declaration", "isolatedModules"));
+                    createDiagnosticForOptionName(Diagnostics.Option_0_cannot_be_specified_with_option_1, "declaration", "isolatedModules");
                 }
 
                 if (options.noEmitOnError) {
-                    programDiagnostics.add(createCompilerDiagnostic(Diagnostics.Option_0_cannot_be_specified_with_option_1, "noEmitOnError", "isolatedModules"));
+                    createDiagnosticForOptionName(Diagnostics.Option_0_cannot_be_specified_with_option_1, "noEmitOnError", "isolatedModules");
                 }
 
                 if (options.out) {
-                    programDiagnostics.add(createCompilerDiagnostic(Diagnostics.Option_0_cannot_be_specified_with_option_1, "out", "isolatedModules"));
+                    createDiagnosticForOptionName(Diagnostics.Option_0_cannot_be_specified_with_option_1, "out", "isolatedModules");
                 }
 
                 if (options.outFile) {
-                    programDiagnostics.add(createCompilerDiagnostic(Diagnostics.Option_0_cannot_be_specified_with_option_1, "outFile", "isolatedModules"));
+                    createDiagnosticForOptionName(Diagnostics.Option_0_cannot_be_specified_with_option_1, "outFile", "isolatedModules");
                 }
             }
 
             if (options.inlineSourceMap) {
                 if (options.sourceMap) {
-                    programDiagnostics.add(createCompilerDiagnostic(Diagnostics.Option_0_cannot_be_specified_with_option_1, "sourceMap", "inlineSourceMap"));
+                    createDiagnosticForOptionName(Diagnostics.Option_0_cannot_be_specified_with_option_1, "sourceMap", "inlineSourceMap");
                 }
                 if (options.mapRoot) {
-                    programDiagnostics.add(createCompilerDiagnostic(Diagnostics.Option_0_cannot_be_specified_with_option_1, "mapRoot", "inlineSourceMap"));
+                    createDiagnosticForOptionName(Diagnostics.Option_0_cannot_be_specified_with_option_1, "mapRoot", "inlineSourceMap");
                 }
             }
 
             if (options.paths && options.baseUrl === undefined) {
-                programDiagnostics.add(createCompilerDiagnostic(Diagnostics.Option_paths_cannot_be_used_without_specifying_baseUrl_option));
+                createDiagnosticForOptionName(Diagnostics.Option_paths_cannot_be_used_without_specifying_baseUrl_option, "paths");
             }
 
             if (options.paths) {
@@ -1418,77 +1813,83 @@ namespace ts {
                         continue;
                     }
                     if (!hasZeroOrOneAsteriskCharacter(key)) {
-                        programDiagnostics.add(createCompilerDiagnostic(Diagnostics.Pattern_0_can_have_at_most_one_Asterisk_character, key));
+                        createDiagnosticForOptionPaths(/*onKey*/ true, key, Diagnostics.Pattern_0_can_have_at_most_one_Asterisk_character, key);
                     }
                     if (isArray(options.paths[key])) {
-                        if (options.paths[key].length === 0) {
-                            programDiagnostics.add(createCompilerDiagnostic(Diagnostics.Substitutions_for_pattern_0_shouldn_t_be_an_empty_array, key));
+                        const len = options.paths[key].length;
+                        if (len === 0) {
+                            createDiagnosticForOptionPaths(/*onKey*/ false, key, Diagnostics.Substitutions_for_pattern_0_shouldn_t_be_an_empty_array, key);
                         }
-                        for (const subst of options.paths[key]) {
+                        for (let i = 0; i < len; i++) {
+                            const subst = options.paths[key][i];
                             const typeOfSubst = typeof subst;
                             if (typeOfSubst === "string") {
                                 if (!hasZeroOrOneAsteriskCharacter(subst)) {
-                                    programDiagnostics.add(createCompilerDiagnostic(Diagnostics.Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character, subst, key));
+                                    createDiagnosticForOptionPathKeyValue(key, i, Diagnostics.Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character, subst, key);
                                 }
                             }
                             else {
-                                programDiagnostics.add(createCompilerDiagnostic(Diagnostics.Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2, subst, key, typeOfSubst));
+                                createDiagnosticForOptionPathKeyValue(key, i, Diagnostics.Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2, subst, key, typeOfSubst);
                             }
                         }
                     }
                     else {
-                        programDiagnostics.add(createCompilerDiagnostic(Diagnostics.Substitutions_for_pattern_0_should_be_an_array, key));
+                        createDiagnosticForOptionPaths(/*onKey*/ false, key, Diagnostics.Substitutions_for_pattern_0_should_be_an_array, key);
                     }
                 }
             }
 
             if (!options.sourceMap && !options.inlineSourceMap) {
                 if (options.inlineSources) {
-                    programDiagnostics.add(createCompilerDiagnostic(Diagnostics.Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided, "inlineSources"));
+                    createDiagnosticForOptionName(Diagnostics.Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided, "inlineSources");
                 }
                 if (options.sourceRoot) {
-                    programDiagnostics.add(createCompilerDiagnostic(Diagnostics.Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided, "sourceRoot"));
+                    createDiagnosticForOptionName(Diagnostics.Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided, "sourceRoot");
                 }
             }
 
             if (options.out && options.outFile) {
-                programDiagnostics.add(createCompilerDiagnostic(Diagnostics.Option_0_cannot_be_specified_with_option_1, "out", "outFile"));
+                createDiagnosticForOptionName(Diagnostics.Option_0_cannot_be_specified_with_option_1, "out", "outFile");
             }
 
             if (options.mapRoot && !options.sourceMap) {
                 // Error to specify --mapRoot without --sourcemap
-                programDiagnostics.add(createCompilerDiagnostic(Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "mapRoot", "sourceMap"));
+                createDiagnosticForOptionName(Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "mapRoot", "sourceMap");
             }
 
             if (options.declarationDir) {
                 if (!options.declaration) {
-                    programDiagnostics.add(createCompilerDiagnostic(Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "declarationDir", "declaration"));
+                    createDiagnosticForOptionName(Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "declarationDir", "declaration");
                 }
                 if (options.out || options.outFile) {
-                    programDiagnostics.add(createCompilerDiagnostic(Diagnostics.Option_0_cannot_be_specified_with_option_1, "declarationDir", options.out ? "out" : "outFile"));
+                    createDiagnosticForOptionName(Diagnostics.Option_0_cannot_be_specified_with_option_1, "declarationDir", options.out ? "out" : "outFile");
                 }
             }
 
             if (options.lib && options.noLib) {
-                programDiagnostics.add(createCompilerDiagnostic(Diagnostics.Option_0_cannot_be_specified_with_option_1, "lib", "noLib"));
+                createDiagnosticForOptionName(Diagnostics.Option_0_cannot_be_specified_with_option_1, "lib", "noLib");
+            }
+
+            if (options.noImplicitUseStrict && (options.alwaysStrict === undefined ? options.strict : options.alwaysStrict)) {
+                createDiagnosticForOptionName(Diagnostics.Option_0_cannot_be_specified_with_option_1, "noImplicitUseStrict", "alwaysStrict");
             }
 
             const languageVersion = options.target || ScriptTarget.ES3;
             const outFile = options.outFile || options.out;
 
-            const firstNonAmbientExternalModuleSourceFile = forEach(files, f => isExternalModule(f) && !isDeclarationFile(f) ? f : undefined);
+            const firstNonAmbientExternalModuleSourceFile = forEach(files, f => isExternalModule(f) && !f.isDeclarationFile ? f : undefined);
             if (options.isolatedModules) {
-                if (options.module === ModuleKind.None && languageVersion < ScriptTarget.ES6) {
-                    programDiagnostics.add(createCompilerDiagnostic(Diagnostics.Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES2015_or_higher));
+                if (options.module === ModuleKind.None && languageVersion < ScriptTarget.ES2015) {
+                    createDiagnosticForOptionName(Diagnostics.Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES2015_or_higher, "isolatedModules", "target");
                 }
 
-                const firstNonExternalModuleSourceFile = forEach(files, f => !isExternalModule(f) && !isDeclarationFile(f) ? f : undefined);
+                const firstNonExternalModuleSourceFile = forEach(files, f => !isExternalModule(f) && !f.isDeclarationFile ? f : undefined);
                 if (firstNonExternalModuleSourceFile) {
                     const span = getErrorSpanForNode(firstNonExternalModuleSourceFile, firstNonExternalModuleSourceFile);
                     programDiagnostics.add(createFileDiagnostic(firstNonExternalModuleSourceFile, span.start, span.length, Diagnostics.Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided));
                 }
             }
-            else if (firstNonAmbientExternalModuleSourceFile && languageVersion < ScriptTarget.ES6 && options.module === ModuleKind.None) {
+            else if (firstNonAmbientExternalModuleSourceFile && languageVersion < ScriptTarget.ES2015 && options.module === ModuleKind.None) {
                 // We cannot use createDiagnosticFromNode because nodes do not have parents yet
                 const span = getErrorSpanForNode(firstNonAmbientExternalModuleSourceFile, firstNonAmbientExternalModuleSourceFile.externalModuleIndicator);
                 programDiagnostics.add(createFileDiagnostic(firstNonAmbientExternalModuleSourceFile, span.start, span.length, Diagnostics.Cannot_use_imports_exports_or_module_augmentations_when_module_is_none));
@@ -1497,7 +1898,7 @@ namespace ts {
             // Cannot specify module gen that isn't amd or system with --out
             if (outFile) {
                 if (options.module && !(options.module === ModuleKind.AMD || options.module === ModuleKind.System)) {
-                    programDiagnostics.add(createCompilerDiagnostic(Diagnostics.Only_amd_and_system_modules_are_supported_alongside_0, options.out ? "out" : "outFile"));
+                    createDiagnosticForOptionName(Diagnostics.Only_amd_and_system_modules_are_supported_alongside_0, options.out ? "out" : "outFile", "module");
                 }
                 else if (options.module === undefined && firstNonAmbientExternalModuleSourceFile) {
                     const span = getErrorSpanForNode(firstNonAmbientExternalModuleSourceFile, firstNonAmbientExternalModuleSourceFile.externalModuleIndicator);
@@ -1516,28 +1917,40 @@ namespace ts {
 
                 // If we failed to find a good common directory, but outDir is specified and at least one of our files is on a windows drive/URL/other resource, add a failure
                 if (options.outDir && dir === "" && forEach(files, file => getRootLength(file.fileName) > 1)) {
-                    programDiagnostics.add(createCompilerDiagnostic(Diagnostics.Cannot_find_the_common_subdirectory_path_for_the_input_files));
+                    createDiagnosticForOptionName(Diagnostics.Cannot_find_the_common_subdirectory_path_for_the_input_files, "outDir");
                 }
             }
 
             if (!options.noEmit && options.allowJs && options.declaration) {
-                programDiagnostics.add(createCompilerDiagnostic(Diagnostics.Option_0_cannot_be_specified_with_option_1, "allowJs", "declaration"));
+                createDiagnosticForOptionName(Diagnostics.Option_0_cannot_be_specified_with_option_1, "allowJs", "declaration");
+            }
+
+            if (options.checkJs && !options.allowJs) {
+                programDiagnostics.add(createCompilerDiagnostic(Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "checkJs", "allowJs"));
             }
 
             if (options.emitDecoratorMetadata &&
                 !options.experimentalDecorators) {
-                programDiagnostics.add(createCompilerDiagnostic(Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "emitDecoratorMetadata", "experimentalDecorators"));
+                createDiagnosticForOptionName(Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "emitDecoratorMetadata", "experimentalDecorators");
             }
 
-            if (options.reactNamespace && !isIdentifierText(options.reactNamespace, languageVersion)) {
-                programDiagnostics.add(createCompilerDiagnostic(Diagnostics.Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier, options.reactNamespace));
+            if (options.jsxFactory) {
+                if (options.reactNamespace) {
+                    createDiagnosticForOptionName(Diagnostics.Option_0_cannot_be_specified_with_option_1, "reactNamespace", "jsxFactory");
+                }
+                if (!parseIsolatedEntityName(options.jsxFactory, languageVersion)) {
+                    createOptionValueDiagnostic("jsxFactory", Diagnostics.Invalid_value_for_jsxFactory_0_is_not_a_valid_identifier_or_qualified_name, options.jsxFactory);
+                }
+            }
+            else if (options.reactNamespace && !isIdentifierText(options.reactNamespace, languageVersion)) {
+                createOptionValueDiagnostic("reactNamespace", Diagnostics.Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier, options.reactNamespace);
             }
 
             // If the emit is enabled make sure that every output file is unique and not overwriting any of the input files
             if (!options.noEmit && !options.suppressOutputPathCheck) {
                 const emitHost = getEmitHost();
                 const emitFilesSeen = createFileMap<boolean>(!host.useCaseSensitiveFileNames() ? key => key.toLocaleLowerCase() : undefined);
-                forEachExpectedEmitFile(emitHost, (emitFileNames, sourceFiles, isBundledEmit) => {
+                forEachEmittedFile(emitHost, (emitFileNames) => {
                     verifyEmitFilePath(emitFileNames.jsFilePath, emitFilesSeen);
                     verifyEmitFilePath(emitFileNames.declarationFilePath, emitFilesSeen);
                 });
@@ -1549,13 +1962,19 @@ namespace ts {
                     const emitFilePath = toPath(emitFileName, currentDirectory, getCanonicalFileName);
                     // Report error if the output overwrites input file
                     if (filesByName.contains(emitFilePath)) {
-                        createEmitBlockingDiagnostics(emitFileName, emitFilePath, Diagnostics.Cannot_write_file_0_because_it_would_overwrite_input_file);
+                        let chain: DiagnosticMessageChain;
+                        if (!options.configFilePath) {
+                            // The program is from either an inferred project or an external project
+                            chain = chainDiagnosticMessages(/*details*/ undefined, Diagnostics.Adding_a_tsconfig_json_file_will_help_organize_projects_that_contain_both_TypeScript_and_JavaScript_files_Learn_more_at_https_Colon_Slash_Slashaka_ms_Slashtsconfig);
+                        }
+                        chain = chainDiagnosticMessages(chain, Diagnostics.Cannot_write_file_0_because_it_would_overwrite_input_file, emitFileName);
+                        blockEmittingOfFile(emitFileName, createCompilerDiagnosticFromMessageChain(chain));
                     }
 
                     // Report error if multiple files write into same file
                     if (emitFilesSeen.contains(emitFilePath)) {
                         // Already seen the same emit file - report error
-                        createEmitBlockingDiagnostics(emitFileName, emitFilePath, Diagnostics.Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files);
+                        blockEmittingOfFile(emitFileName, createCompilerDiagnostic(Diagnostics.Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files, emitFileName));
                     }
                     else {
                         emitFilesSeen.set(emitFilePath, true);
@@ -1564,9 +1983,122 @@ namespace ts {
             }
         }
 
-        function createEmitBlockingDiagnostics(emitFileName: string, emitFilePath: Path, message: DiagnosticMessage) {
+        function createDiagnosticForOptionPathKeyValue(key: string, valueIndex: number, message: DiagnosticMessage, arg0: string | number, arg1: string | number, arg2?: string | number) {
+            let needCompilerDiagnostic = true;
+            const pathsSyntax = getOptionPathsSyntax();
+            for (const pathProp of pathsSyntax) {
+                if (isObjectLiteralExpression(pathProp.initializer)) {
+                    for (const keyProps of getPropertyAssignment(pathProp.initializer, key)) {
+                        if (isArrayLiteralExpression(keyProps.initializer) &&
+                            keyProps.initializer.elements.length > valueIndex) {
+                            programDiagnostics.add(createDiagnosticForNodeInSourceFile(options.configFile, keyProps.initializer.elements[valueIndex], message, arg0, arg1, arg2));
+                            needCompilerDiagnostic = false;
+                        }
+                    }
+                }
+            }
+
+            if (needCompilerDiagnostic) {
+                programDiagnostics.add(createCompilerDiagnostic(message, arg0, arg1, arg2));
+            }
+        }
+
+        function createDiagnosticForOptionPaths(onKey: boolean, key: string, message: DiagnosticMessage, arg0: string | number) {
+            let needCompilerDiagnostic = true;
+            const pathsSyntax = getOptionPathsSyntax();
+            for (const pathProp of pathsSyntax) {
+                if (isObjectLiteralExpression(pathProp.initializer) &&
+                    createOptionDiagnosticInObjectLiteralSyntax(
+                        pathProp.initializer, onKey, key, /*key2*/ undefined,
+                        message, arg0)) {
+                    needCompilerDiagnostic = false;
+                }
+            }
+            if (needCompilerDiagnostic) {
+                programDiagnostics.add(createCompilerDiagnostic(message, arg0));
+            }
+        }
+
+        function getOptionPathsSyntax() {
+            const compilerOptionsObjectLiteralSyntax = getCompilerOptionsObjectLiteralSyntax();
+            if (compilerOptionsObjectLiteralSyntax) {
+                return getPropertyAssignment(compilerOptionsObjectLiteralSyntax, "paths");
+            }
+            return emptyArray;
+        }
+
+        function createDiagnosticForOptionName(message: DiagnosticMessage, option1: string, option2?: string) {
+            createDiagnosticForOption(/*onKey*/ true, option1, option2, message, option1, option2);
+        }
+
+        function createOptionValueDiagnostic(option1: string, message: DiagnosticMessage, arg0: string) {
+            createDiagnosticForOption(/*onKey*/ false, option1, /*option2*/ undefined, message, arg0);
+        }
+
+        function createDiagnosticForOption(onKey: boolean, option1: string, option2: string, message: DiagnosticMessage, arg0: string | number, arg1?: string | number) {
+            const compilerOptionsObjectLiteralSyntax = getCompilerOptionsObjectLiteralSyntax();
+            const needCompilerDiagnostic = !compilerOptionsObjectLiteralSyntax ||
+                !createOptionDiagnosticInObjectLiteralSyntax(compilerOptionsObjectLiteralSyntax, onKey, option1, option2, message, arg0, arg1);
+
+            if (needCompilerDiagnostic) {
+                programDiagnostics.add(createCompilerDiagnostic(message, arg0, arg1));
+            }
+        }
+
+        function getCompilerOptionsObjectLiteralSyntax() {
+            if (_compilerOptionsObjectLiteralSyntax === undefined) {
+                _compilerOptionsObjectLiteralSyntax = null; // tslint:disable-line:no-null-keyword
+                if (options.configFile && options.configFile.jsonObject) {
+                    for (const prop of getPropertyAssignment(options.configFile.jsonObject, "compilerOptions")) {
+                        if (isObjectLiteralExpression(prop.initializer)) {
+                            _compilerOptionsObjectLiteralSyntax = prop.initializer;
+                            break;
+                        }
+                    }
+                }
+            }
+            return _compilerOptionsObjectLiteralSyntax;
+        }
+
+        function createOptionDiagnosticInObjectLiteralSyntax(objectLiteral: ObjectLiteralExpression, onKey: boolean, key1: string, key2: string, message: DiagnosticMessage, arg0: string | number, arg1?: string | number): boolean {
+            const props = getPropertyAssignment(objectLiteral, key1, key2);
+            for (const prop of props) {
+                programDiagnostics.add(createDiagnosticForNodeInSourceFile(options.configFile, onKey ? prop.name : prop.initializer, message, arg0, arg1));
+            }
+            return !!props.length;
+        }
+
+        function blockEmittingOfFile(emitFileName: string, diag: Diagnostic) {
             hasEmitBlockingDiagnostics.set(toPath(emitFileName, currentDirectory, getCanonicalFileName), true);
-            programDiagnostics.add(createCompilerDiagnostic(message, emitFileName));
+            programDiagnostics.add(diag);
+        }
+    }
+
+    /* @internal */
+    /**
+     * Returns a DiagnosticMessage if we won't include a resolved module due to its extension.
+     * The DiagnosticMessage's parameters are the imported module name, and the filename it resolved to.
+     * This returns a diagnostic even if the module will be an untyped module.
+     */
+    export function getResolutionDiagnostic(options: CompilerOptions, { extension }: ResolvedModuleFull): DiagnosticMessage | undefined {
+        switch (extension) {
+            case Extension.Ts:
+            case Extension.Dts:
+                // These are always allowed.
+                return undefined;
+            case Extension.Tsx:
+                return needJsx();
+            case Extension.Jsx:
+                return needJsx() || needAllowJs();
+            case Extension.Js:
+                return needAllowJs();
+        }
+
+        function needJsx() {
+            return options.jsx ? undefined : Diagnostics.Module_0_was_resolved_to_1_but_jsx_is_not_set;
+        }
+        function needAllowJs() {
+            return options.allowJs ? undefined : Diagnostics.Module_0_was_resolved_to_1_but_allowJs_is_not_set;
         }
     }
 }
diff --git a/src/compiler/scanner.ts b/src/compiler/scanner.ts
index e7b3872..dd43b3c 100644
--- a/src/compiler/scanner.ts
+++ b/src/compiler/scanner.ts
@@ -23,6 +23,8 @@ namespace ts {
         isIdentifier(): boolean;
         isReservedWord(): boolean;
         isUnterminated(): boolean;
+        /* @internal */
+        getNumericLiteralFlags(): NumericLiteralFlags;
         reScanGreaterToken(): SyntaxKind;
         reScanSlashToken(): SyntaxKind;
         reScanTemplateToken(): SyntaxKind;
@@ -56,7 +58,7 @@ namespace ts {
         tryScan<T>(callback: () => T): T;
     }
 
-    const textToToken = createMap({
+    const textToToken = createMapFromTemplate({
         "abstract": SyntaxKind.AbstractKeyword,
         "any": SyntaxKind.AnyKeyword,
         "as": SyntaxKind.AsKeyword,
@@ -90,6 +92,7 @@ namespace ts {
         "instanceof": SyntaxKind.InstanceOfKeyword,
         "interface": SyntaxKind.InterfaceKeyword,
         "is": SyntaxKind.IsKeyword,
+        "keyof": SyntaxKind.KeyOfKeyword,
         "let": SyntaxKind.LetKeyword,
         "module": SyntaxKind.ModuleKeyword,
         "namespace": SyntaxKind.NamespaceKeyword,
@@ -97,6 +100,7 @@ namespace ts {
         "new": SyntaxKind.NewKeyword,
         "null": SyntaxKind.NullKeyword,
         "number": SyntaxKind.NumberKeyword,
+        "object": SyntaxKind.ObjectKeyword,
         "package": SyntaxKind.PackageKeyword,
         "private": SyntaxKind.PrivateKeyword,
         "protected": SyntaxKind.ProtectedKeyword,
@@ -274,21 +278,21 @@ namespace ts {
 
     function makeReverseMap(source: Map<number>): string[] {
         const result: string[] = [];
-        for (const name in source) {
-            result[source[name]] = name;
-        }
+        source.forEach((value, name) => {
+            result[value] = name;
+        });
         return result;
     }
 
     const tokenStrings = makeReverseMap(textToToken);
 
-    export function tokenToString(t: SyntaxKind): string {
+    export function tokenToString(t: SyntaxKind): string | undefined {
         return tokenStrings[t];
     }
 
     /* @internal */
     export function stringToToken(s: string): SyntaxKind {
-        return textToToken[s];
+        return textToToken.get(s);
     }
 
     /* @internal */
@@ -304,6 +308,7 @@ namespace ts {
                     if (text.charCodeAt(pos) === CharacterCodes.lineFeed) {
                         pos++;
                     }
+                    // falls through
                 case CharacterCodes.lineFeed:
                     result.push(lineStart);
                     lineStart = pos;
@@ -331,7 +336,7 @@ namespace ts {
     }
 
     /* @internal */
-    export function getLineStarts(sourceFile: SourceFile): number[] {
+    export function getLineStarts(sourceFile: SourceFileLike): number[] {
         return sourceFile.lineMap || (sourceFile.lineMap = computeLineStarts(sourceFile.text));
     }
 
@@ -358,13 +363,11 @@ namespace ts {
         };
     }
 
-    export function getLineAndCharacterOfPosition(sourceFile: SourceFile, position: number): LineAndCharacter {
+    export function getLineAndCharacterOfPosition(sourceFile: SourceFileLike, position: number): LineAndCharacter {
         return computeLineAndCharacterOfPosition(getLineStarts(sourceFile), position);
     }
 
-    const hasOwnProperty = Object.prototype.hasOwnProperty;
-
-    export function isWhiteSpace(ch: number): boolean {
+    export function isWhiteSpaceLike(ch: number): boolean {
         return isWhiteSpaceSingleLine(ch) || isLineBreak(ch);
     }
 
@@ -426,6 +429,7 @@ namespace ts {
               case CharacterCodes.slash:
                   // starts of normal trivia
               case CharacterCodes.lessThan:
+              case CharacterCodes.bar:
               case CharacterCodes.equals:
               case CharacterCodes.greaterThan:
                   // Starts of conflict marker trivia
@@ -452,6 +456,7 @@ namespace ts {
                       if (text.charCodeAt(pos + 1) === CharacterCodes.lineFeed) {
                           pos++;
                       }
+                      // falls through
                   case CharacterCodes.lineFeed:
                       pos++;
                       if (stopAfterLineBreak) {
@@ -492,6 +497,7 @@ namespace ts {
                       break;
 
                   case CharacterCodes.lessThan:
+                  case CharacterCodes.bar:
                   case CharacterCodes.equals:
                   case CharacterCodes.greaterThan:
                       if (isConflictMarkerTrivia(text, pos)) {
@@ -508,7 +514,7 @@ namespace ts {
                       break;
 
                   default:
-                      if (ch > CharacterCodes.maxAsciiCharacter && (isWhiteSpace(ch))) {
+                      if (ch > CharacterCodes.maxAsciiCharacter && (isWhiteSpaceLike(ch))) {
                           pos++;
                           continue;
                       }
@@ -530,7 +536,7 @@ namespace ts {
             const ch = text.charCodeAt(pos);
 
             if ((pos + mergeConflictMarkerLength) < text.length) {
-                for (let i = 0, n = mergeConflictMarkerLength; i < n; i++) {
+                for (let i = 0; i < mergeConflictMarkerLength; i++) {
                     if (text.charCodeAt(pos + i) !== ch) {
                         return false;
                     }
@@ -558,12 +564,12 @@ namespace ts {
             }
         }
         else {
-            Debug.assert(ch === CharacterCodes.equals);
-            // Consume everything from the start of the mid-conflict marker to the start of the next
-            // end-conflict marker.
+            Debug.assert(ch === CharacterCodes.bar || ch === CharacterCodes.equals);
+            // Consume everything from the start of a ||||||| or ======= marker to the start
+            // of the next ======= or >>>>>>> marker.
             while (pos < len) {
-                const ch = text.charCodeAt(pos);
-                if (ch === CharacterCodes.greaterThan && isConflictMarkerTrivia(text, pos)) {
+                const currentChar = text.charCodeAt(pos);
+                if ((currentChar === CharacterCodes.equals || currentChar === CharacterCodes.greaterThan) && currentChar !== ch && isConflictMarkerTrivia(text, pos)) {
                     break;
                 }
 
@@ -608,10 +614,10 @@ namespace ts {
      * @returns If "reduce" is true, the accumulated value. If "reduce" is false, the first truthy
      *      return value of the callback.
      */
-    function iterateCommentRanges<T, U>(reduce: boolean, text: string, pos: number, trailing: boolean, cb: (pos: number, end: number, kind: SyntaxKind, hasTrailingNewLine: boolean, state: T, memo: U) => U, state: T, initial?: U): U {
+    function iterateCommentRanges<T, U>(reduce: boolean, text: string, pos: number, trailing: boolean, cb: (pos: number, end: number, kind: CommentKind, hasTrailingNewLine: boolean, state: T, memo: U) => U, state: T, initial?: U): U {
         let pendingPos: number;
         let pendingEnd: number;
-        let pendingKind: SyntaxKind;
+        let pendingKind: CommentKind;
         let pendingHasTrailingNewLine: boolean;
         let hasPendingCommentRange = false;
         let collecting = trailing || pos === 0;
@@ -623,6 +629,7 @@ namespace ts {
                     if (text.charCodeAt(pos + 1) === CharacterCodes.lineFeed) {
                         pos++;
                     }
+                    // falls through
                 case CharacterCodes.lineFeed:
                     pos++;
                     if (trailing) {
@@ -642,7 +649,7 @@ namespace ts {
                     pos++;
                     continue;
                 case CharacterCodes.slash:
-                    let nextChar = text.charCodeAt(pos + 1);
+                    const nextChar = text.charCodeAt(pos + 1);
                     let hasTrailingNewLine = false;
                     if (nextChar === CharacterCodes.slash || nextChar === CharacterCodes.asterisk) {
                         const kind = nextChar === CharacterCodes.slash ? SyntaxKind.SingleLineCommentTrivia : SyntaxKind.MultiLineCommentTrivia;
@@ -689,7 +696,7 @@ namespace ts {
                     }
                     break scan;
                 default:
-                    if (ch > CharacterCodes.maxAsciiCharacter && (isWhiteSpace(ch))) {
+                    if (ch > CharacterCodes.maxAsciiCharacter && (isWhiteSpaceLike(ch))) {
                         if (hasPendingCommentRange && isLineBreak(ch)) {
                             pendingHasTrailingNewLine = true;
                         }
@@ -707,44 +714,45 @@ namespace ts {
         return accumulator;
     }
 
-    export function forEachLeadingCommentRange<T, U>(text: string, pos: number, cb: (pos: number, end: number, kind: SyntaxKind, hasTrailingNewLine: boolean, state: T) => U, state?: T) {
+    export function forEachLeadingCommentRange<T, U>(text: string, pos: number, cb: (pos: number, end: number, kind: CommentKind, hasTrailingNewLine: boolean, state: T) => U, state?: T): U | undefined {
         return iterateCommentRanges(/*reduce*/ false, text, pos, /*trailing*/ false, cb, state);
     }
 
-    export function forEachTrailingCommentRange<T, U>(text: string, pos: number, cb: (pos: number, end: number, kind: SyntaxKind, hasTrailingNewLine: boolean, state: T) => U, state?: T) {
+    export function forEachTrailingCommentRange<T, U>(text: string, pos: number, cb: (pos: number, end: number, kind: CommentKind, hasTrailingNewLine: boolean, state: T) => U, state?: T): U | undefined {
         return iterateCommentRanges(/*reduce*/ false, text, pos, /*trailing*/ true, cb, state);
     }
 
-    export function reduceEachLeadingCommentRange<T, U>(text: string, pos: number, cb: (pos: number, end: number, kind: SyntaxKind, hasTrailingNewLine: boolean, state: T, memo: U) => U, state: T, initial: U) {
+    export function reduceEachLeadingCommentRange<T, U>(text: string, pos: number, cb: (pos: number, end: number, kind: CommentKind, hasTrailingNewLine: boolean, state: T, memo: U) => U, state: T, initial: U) {
         return iterateCommentRanges(/*reduce*/ true, text, pos, /*trailing*/ false, cb, state, initial);
     }
 
-    export function reduceEachTrailingCommentRange<T, U>(text: string, pos: number, cb: (pos: number, end: number, kind: SyntaxKind, hasTrailingNewLine: boolean, state: T, memo: U) => U, state: T, initial: U) {
+    export function reduceEachTrailingCommentRange<T, U>(text: string, pos: number, cb: (pos: number, end: number, kind: CommentKind, hasTrailingNewLine: boolean, state: T, memo: U) => U, state: T, initial: U) {
         return iterateCommentRanges(/*reduce*/ true, text, pos, /*trailing*/ true, cb, state, initial);
     }
 
-    function appendCommentRange(pos: number, end: number, kind: SyntaxKind, hasTrailingNewLine: boolean, state: any, comments: CommentRange[]) {
+    function appendCommentRange(pos: number, end: number, kind: CommentKind, hasTrailingNewLine: boolean, _state: any, comments: CommentRange[]) {
         if (!comments) {
             comments = [];
         }
 
-        comments.push({ pos, end, hasTrailingNewLine, kind });
+        comments.push({ kind, pos, end, hasTrailingNewLine });
         return comments;
     }
 
-    export function getLeadingCommentRanges(text: string, pos: number): CommentRange[] {
-        return reduceEachLeadingCommentRange(text, pos, appendCommentRange, undefined, undefined);
+    export function getLeadingCommentRanges(text: string, pos: number): CommentRange[] | undefined {
+        return reduceEachLeadingCommentRange(text, pos, appendCommentRange, /*state*/ undefined, /*initial*/ undefined);
     }
 
-    export function getTrailingCommentRanges(text: string, pos: number): CommentRange[] {
-        return reduceEachTrailingCommentRange(text, pos, appendCommentRange, undefined, undefined);
+    export function getTrailingCommentRanges(text: string, pos: number): CommentRange[] | undefined {
+        return reduceEachTrailingCommentRange(text, pos, appendCommentRange, /*state*/ undefined, /*initial*/ undefined);
     }
 
     /** Optionally, get the shebang */
-    export function getShebang(text: string): string {
-        return shebangTriviaRegex.test(text)
-            ? shebangTriviaRegex.exec(text)[0]
-            : undefined;
+    export function getShebang(text: string): string | undefined {
+        const match = shebangTriviaRegex.exec(text);
+        if (match) {
+            return match[0];
+        }
     }
 
     export function isIdentifierStart(ch: number, languageVersion: ScriptTarget): boolean {
@@ -765,7 +773,7 @@ namespace ts {
             return false;
         }
 
-        for (let i = 1, n = name.length; i < n; i++) {
+        for (let i = 1; i < name.length; i++) {
             if (!isIdentifierPart(name.charCodeAt(i), languageVersion)) {
                 return false;
             }
@@ -799,6 +807,7 @@ namespace ts {
         let precedingLineBreak: boolean;
         let hasExtendedUnicodeEscape: boolean;
         let tokenIsUnterminated: boolean;
+        let numericLiteralFlags: NumericLiteralFlags;
 
         setText(text, start, length);
 
@@ -814,6 +823,7 @@ namespace ts {
             isIdentifier: () => token === SyntaxKind.Identifier || token > SyntaxKind.LastReservedWord,
             isReservedWord: () => token >= SyntaxKind.FirstReservedWord && token <= SyntaxKind.LastReservedWord,
             isUnterminated: () => tokenIsUnterminated,
+            getNumericLiteralFlags: () => numericLiteralFlags,
             reScanGreaterToken,
             reScanSlashToken,
             reScanTemplateToken,
@@ -850,6 +860,7 @@ namespace ts {
             let end = pos;
             if (text.charCodeAt(pos) === CharacterCodes.E || text.charCodeAt(pos) === CharacterCodes.e) {
                 pos++;
+                numericLiteralFlags = NumericLiteralFlags.Scientific;
                 if (text.charCodeAt(pos) === CharacterCodes.plus || text.charCodeAt(pos) === CharacterCodes.minus) pos++;
                 if (isDigit(text.charCodeAt(pos))) {
                     pos++;
@@ -1067,7 +1078,7 @@ namespace ts {
                     if (pos < end && text.charCodeAt(pos) === CharacterCodes.lineFeed) {
                         pos++;
                     }
-                    // fall through
+                    // falls through
                 case CharacterCodes.lineFeed:
                 case CharacterCodes.lineSeparator:
                 case CharacterCodes.paragraphSeparator:
@@ -1182,15 +1193,18 @@ namespace ts {
             const len = tokenValue.length;
             if (len >= 2 && len <= 11) {
                 const ch = tokenValue.charCodeAt(0);
-                if (ch >= CharacterCodes.a && ch <= CharacterCodes.z && hasOwnProperty.call(textToToken, tokenValue)) {
-                    return token = textToToken[tokenValue];
+                if (ch >= CharacterCodes.a && ch <= CharacterCodes.z) {
+                    token = textToToken.get(tokenValue);
+                    if (token !== undefined) {
+                        return token;
+                    }
                 }
             }
             return token = SyntaxKind.Identifier;
         }
 
         function scanBinaryOrOctalDigits(base: number): number {
-            Debug.assert(base !== 2 || base !== 8, "Expected either base 2 or base 8");
+            Debug.assert(base === 2 || base === 8, "Expected either base 2 or base 8");
 
             let value = 0;
             // For counting number of digits; Valid binaryIntegerLiteral must have at least one binary digit following B or b.
@@ -1218,6 +1232,7 @@ namespace ts {
             hasExtendedUnicodeEscape = false;
             precedingLineBreak = false;
             tokenIsUnterminated = false;
+            numericLiteralFlags = 0;
             while (true) {
                 tokenPos = pos;
                 if (pos >= end) {
@@ -1416,6 +1431,7 @@ namespace ts {
                                 value = 0;
                             }
                             tokenValue = "" + value;
+                            numericLiteralFlags = NumericLiteralFlags.HexSpecifier;
                             return token = SyntaxKind.NumericLiteral;
                         }
                         else if (pos + 2 < end && (text.charCodeAt(pos + 1) === CharacterCodes.B || text.charCodeAt(pos + 1) === CharacterCodes.b)) {
@@ -1426,6 +1442,7 @@ namespace ts {
                                 value = 0;
                             }
                             tokenValue = "" + value;
+                            numericLiteralFlags = NumericLiteralFlags.BinarySpecifier;
                             return token = SyntaxKind.NumericLiteral;
                         }
                         else if (pos + 2 < end && (text.charCodeAt(pos + 1) === CharacterCodes.O || text.charCodeAt(pos + 1) === CharacterCodes.o)) {
@@ -1436,16 +1453,19 @@ namespace ts {
                                 value = 0;
                             }
                             tokenValue = "" + value;
+                            numericLiteralFlags = NumericLiteralFlags.OctalSpecifier;
                             return token = SyntaxKind.NumericLiteral;
                         }
                         // Try to parse as an octal
                         if (pos + 1 < end && isOctalDigit(text.charCodeAt(pos + 1))) {
                             tokenValue = "" + scanOctalDigits();
+                            numericLiteralFlags = NumericLiteralFlags.Octal;
                             return token = SyntaxKind.NumericLiteral;
                         }
                         // This fall-through is a deviation from the EcmaScript grammar. The grammar says that a leading zero
                         // can only be followed by an octal digit, a dot, or the end of the number literal. However, we are being
                         // permissive and allowing decimal digits of the form 08* and 09* (which many browsers also do).
+                        // falls through
                     case CharacterCodes._1:
                     case CharacterCodes._2:
                     case CharacterCodes._3:
@@ -1544,6 +1564,16 @@ namespace ts {
                         pos++;
                         return token = SyntaxKind.OpenBraceToken;
                     case CharacterCodes.bar:
+                        if (isConflictMarkerTrivia(text, pos)) {
+                            pos = scanConflictMarkerTrivia(text, pos, error);
+                            if (skipTrivia) {
+                                continue;
+                            }
+                            else {
+                                return token = SyntaxKind.ConflictMarkerTrivia;
+                            }
+                        }
+
                         if (text.charCodeAt(pos + 1) === CharacterCodes.bar) {
                             return pos += 2, token = SyntaxKind.BarBarToken;
                         }
@@ -1562,7 +1592,7 @@ namespace ts {
                         pos++;
                         return token = SyntaxKind.AtToken;
                     case CharacterCodes.backslash:
-                        let cookedChar = peekUnicodeEscape();
+                        const cookedChar = peekUnicodeEscape();
                         if (cookedChar >= 0 && isIdentifierStart(cookedChar, languageVersion)) {
                             pos += 6;
                             tokenValue = String.fromCharCode(cookedChar) + scanIdentifierParts();
@@ -1710,14 +1740,40 @@ namespace ts {
                 return token = SyntaxKind.OpenBraceToken;
             }
 
+            // First non-whitespace character on this line.
+            let firstNonWhitespace = 0;
+            // These initial values are special because the first line is:
+            // firstNonWhitespace = 0 to indicate that we want leading whitspace,
+
             while (pos < end) {
-                pos++;
                 char = text.charCodeAt(pos);
-                if ((char === CharacterCodes.openBrace) || (char === CharacterCodes.lessThan)) {
+                if (char === CharacterCodes.openBrace) {
+                    break;
+                }
+                if (char === CharacterCodes.lessThan) {
+                    if (isConflictMarkerTrivia(text, pos)) {
+                        pos = scanConflictMarkerTrivia(text, pos, error);
+                        return token = SyntaxKind.ConflictMarkerTrivia;
+                    }
                     break;
                 }
+
+                // FirstNonWhitespace is 0, then we only see whitespaces so far. If we see a linebreak, we want to ignore that whitespaces.
+                // i.e (- : whitespace)
+                //      <div>----
+                //      </div> becomes <div></div>
+                //
+                //      <div>----</div> becomes <div>----</div>
+                if (isLineBreak(char) && firstNonWhitespace === 0) {
+                    firstNonWhitespace = -1;
+                }
+                else if (!isWhiteSpaceLike(char)) {
+                    firstNonWhitespace = pos;
+                }
+                pos++;
             }
-            return token = SyntaxKind.JsxText;
+
+            return firstNonWhitespace === -1 ? SyntaxKind.JsxTextAllWhiteSpaces : SyntaxKind.JsxText;
         }
 
         // Scans a JSX identifier; these differ from normal identifiers in that
@@ -1799,6 +1855,9 @@ namespace ts {
                 case CharacterCodes.comma:
                     pos++;
                     return token = SyntaxKind.CommaToken;
+                case CharacterCodes.dot:
+                    pos++;
+                    return token = SyntaxKind.DotToken;
             }
 
             if (isIdentifierStart(ch, ScriptTarget.Latest)) {
diff --git a/src/compiler/sourcemap.ts b/src/compiler/sourcemap.ts
index 46db518..ffef485 100644
--- a/src/compiler/sourcemap.ts
+++ b/src/compiler/sourcemap.ts
@@ -8,10 +8,9 @@ namespace ts {
          *
          * @param filePath The path to the generated output file.
          * @param sourceMapFilePath The path to the output source map file.
-         * @param sourceFiles The input source files for the program.
-         * @param isBundledEmit A value indicating whether the generated output file is a bundle.
+         * @param sourceFileOrBundle The input source file or bundle for the program.
          */
-        initialize(filePath: string, sourceMapFilePath: string, sourceFiles: SourceFile[], isBundledEmit: boolean): void;
+        initialize(filePath: string, sourceMapFilePath: string, sourceFileOrBundle: SourceFile | Bundle): void;
 
         /**
          * Reset the SourceMapWriter to an empty state.
@@ -23,7 +22,7 @@ namespace ts {
          *
          * @param sourceFile The source file.
          */
-        setSourceFile(sourceFile: SourceFile): void;
+        setSourceFile(sourceFile: SourceMapSource): void;
 
         /**
          * Emits a mapping.
@@ -38,11 +37,11 @@ namespace ts {
         /**
          * Emits a node with possible leading and trailing source maps.
          *
-         * @param emitContext The current emit context
+         * @param hint The current emit context
          * @param node The node to emit.
          * @param emitCallback The callback used to emit the node.
          */
-        emitNodeWithSourceMap(emitContext: EmitContext, node: Node, emitCallback: (emitContext: EmitContext, node: Node) => void): void;
+        emitNodeWithSourceMap(hint: EmitHint, node: Node, emitCallback: (hint: EmitHint, node: Node) => void): void;
 
         /**
          * Emits a token of a node node with possible leading and trailing source maps.
@@ -82,7 +81,7 @@ namespace ts {
     export function createSourceMapWriter(host: EmitHost, writer: EmitTextWriter): SourceMapWriter {
         const compilerOptions = host.getCompilerOptions();
         const extendedDiagnostics = compilerOptions.extendedDiagnostics;
-        let currentSourceFile: SourceFile;
+        let currentSource: SourceMapSource;
         let currentSourceText: string;
         let sourceMapDir: string; // The directory in which sourcemap will be
 
@@ -110,15 +109,21 @@ namespace ts {
             getSourceMappingURL,
         };
 
+        /**
+         * Skips trivia such as comments and white-space that can optionally overriden by the source map source
+         */
+        function skipSourceTrivia(pos: number): number {
+            return currentSource.skipTrivia ? currentSource.skipTrivia(pos) : skipTrivia(currentSourceText, pos);
+        }
+
         /**
          * Initialize the SourceMapWriter for a new output file.
          *
          * @param filePath The path to the generated output file.
          * @param sourceMapFilePath The path to the output source map file.
-         * @param sourceFiles The input source files for the program.
-         * @param isBundledEmit A value indicating whether the generated output file is a bundle.
+         * @param sourceFileOrBundle The input source file or bundle for the program.
          */
-        function initialize(filePath: string, sourceMapFilePath: string, sourceFiles: SourceFile[], isBundledEmit: boolean) {
+        function initialize(filePath: string, sourceMapFilePath: string, sourceFileOrBundle: SourceFile | Bundle) {
             if (disabled) {
                 return;
             }
@@ -127,7 +132,7 @@ namespace ts {
                 reset();
             }
 
-            currentSourceFile = undefined;
+            currentSource = undefined;
             currentSourceText = undefined;
 
             // Current source map file and its index in the sources list
@@ -161,11 +166,10 @@ namespace ts {
 
             if (compilerOptions.mapRoot) {
                 sourceMapDir = normalizeSlashes(compilerOptions.mapRoot);
-                if (!isBundledEmit) { // emitting single module file
-                    Debug.assert(sourceFiles.length === 1);
+                if (sourceFileOrBundle.kind === SyntaxKind.SourceFile) { // emitting single module file
                     // For modules or multiple emit files the mapRoot will have directory structure like the sources
                     // So if src\a.ts and src\lib\b.ts are compiled together user would be moving the maps into mapRoot\a.js.map and mapRoot\lib\b.js.map
-                    sourceMapDir = getDirectoryPath(getSourceFilePathInNewDir(sourceFiles[0], host, sourceMapDir));
+                    sourceMapDir = getDirectoryPath(getSourceFilePathInNewDir(sourceFileOrBundle, host, sourceMapDir));
                 }
 
                 if (!isRootedDiskPath(sourceMapDir) && !isUrl(sourceMapDir)) {
@@ -195,7 +199,7 @@ namespace ts {
                 return;
             }
 
-            currentSourceFile = undefined;
+            currentSource = undefined;
             sourceMapDir = undefined;
             sourceMapSourceIndex = undefined;
             lastRecordedSourceMapSpan = undefined;
@@ -266,7 +270,7 @@ namespace ts {
                 performance.mark("beforeSourcemap");
             }
 
-            const sourceLinePos = getLineAndCharacterOfPosition(currentSourceFile, pos);
+            const sourceLinePos = getLineAndCharacterOfPosition(currentSource, pos);
 
             // Convert the location to be one-based.
             sourceLinePos.line++;
@@ -311,39 +315,52 @@ namespace ts {
         /**
          * Emits a node with possible leading and trailing source maps.
          *
+         * @param hint A hint as to the intended usage of the node.
          * @param node The node to emit.
          * @param emitCallback The callback used to emit the node.
          */
-        function emitNodeWithSourceMap(emitContext: EmitContext, node: Node, emitCallback: (emitContext: EmitContext, node: Node) => void) {
+        function emitNodeWithSourceMap(hint: EmitHint, node: Node, emitCallback: (hint: EmitHint, node: Node) => void) {
             if (disabled) {
-                return emitCallback(emitContext, node);
+                return emitCallback(hint, node);
             }
 
             if (node) {
                 const emitNode = node.emitNode;
                 const emitFlags = emitNode && emitNode.flags;
-                const { pos, end } = emitNode && emitNode.sourceMapRange || node;
+                const range = emitNode && emitNode.sourceMapRange;
+                const { pos, end } = range || node;
+                let source = range && range.source;
+                const oldSource = currentSource;
+                if (source === oldSource) source = undefined;
+
+                if (source) setSourceFile(source);
 
                 if (node.kind !== SyntaxKind.NotEmittedStatement
                     && (emitFlags & EmitFlags.NoLeadingSourceMap) === 0
                     && pos >= 0) {
-                    emitPos(skipTrivia(currentSourceText, pos));
+                    emitPos(skipSourceTrivia(pos));
                 }
 
+                if (source) setSourceFile(oldSource);
+
                 if (emitFlags & EmitFlags.NoNestedSourceMaps) {
                     disabled = true;
-                    emitCallback(emitContext, node);
+                    emitCallback(hint, node);
                     disabled = false;
                 }
                 else {
-                    emitCallback(emitContext, node);
+                    emitCallback(hint, node);
                 }
 
+                if (source) setSourceFile(source);
+
                 if (node.kind !== SyntaxKind.NotEmittedStatement
                     && (emitFlags & EmitFlags.NoTrailingSourceMap) === 0
                     && end >= 0) {
                     emitPos(end);
                 }
+
+                if (source) setSourceFile(oldSource);
             }
         }
 
@@ -364,7 +381,7 @@ namespace ts {
             const emitFlags = emitNode && emitNode.flags;
             const range = emitNode && emitNode.tokenSourceMapRanges && emitNode.tokenSourceMapRanges[token];
 
-            tokenPos = skipTrivia(currentSourceText, range ? range.pos : tokenPos);
+            tokenPos = skipSourceTrivia(range ? range.pos : tokenPos);
             if ((emitFlags & EmitFlags.NoTokenLeadingSourceMaps) === 0 && tokenPos >= 0) {
                 emitPos(tokenPos);
             }
@@ -384,13 +401,13 @@ namespace ts {
          *
          * @param sourceFile The source file.
          */
-        function setSourceFile(sourceFile: SourceFile) {
+        function setSourceFile(sourceFile: SourceMapSource) {
             if (disabled) {
                 return;
             }
 
-            currentSourceFile = sourceFile;
-            currentSourceText = currentSourceFile.text;
+            currentSource = sourceFile;
+            currentSourceText = currentSource.text;
 
             // Add the file to tsFilePaths
             // If sourceroot option: Use the relative path corresponding to the common directory path
@@ -398,7 +415,7 @@ namespace ts {
             const sourcesDirectoryPath = compilerOptions.sourceRoot ? host.getCommonSourceDirectory() : sourceMapDir;
 
             const source = getRelativePathToDirectoryOrUrl(sourcesDirectoryPath,
-                currentSourceFile.fileName,
+                currentSource.fileName,
                 host.getCurrentDirectory(),
                 host.getCanonicalFileName,
                 /*isAbsolutePathAnUrl*/ true);
@@ -409,10 +426,10 @@ namespace ts {
                 sourceMapData.sourceMapSources.push(source);
 
                 // The one that can be used from program to get the actual source file
-                sourceMapData.inputSourceFileNames.push(currentSourceFile.fileName);
+                sourceMapData.inputSourceFileNames.push(currentSource.fileName);
 
                 if (compilerOptions.inlineSources) {
-                    sourceMapData.sourceMapSourcesContent.push(currentSourceFile.text);
+                    sourceMapData.sourceMapSourcesContent.push(currentSource.text);
                 }
             }
         }
@@ -427,7 +444,7 @@ namespace ts {
 
             encodeLastRecordedSourceMapSpan();
 
-            return stringify({
+            return JSON.stringify({
                 version: 3,
                 file: sourceMapData.sourceMapFile,
                 sourceRoot: sourceMapData.sourceMapSourceRoot,
diff --git a/src/compiler/sys.ts b/src/compiler/sys.ts
index 1ed4b2c..cd14f3b 100644
--- a/src/compiler/sys.ts
+++ b/src/compiler/sys.ts
@@ -1,5 +1,8 @@
 /// <reference path="core.ts"/>
 
+declare function setTimeout(handler: (...args: any[]) => void, timeout: number): any;
+declare function clearTimeout(handle: any): void;
+
 namespace ts {
     export type FileWatcherCallback = (fileName: string, removed?: boolean) => void;
     export type DirectoryWatcherCallback = (fileName: string) => void;
@@ -17,7 +20,11 @@ namespace ts {
         readFile(path: string, encoding?: string): string;
         getFileSize?(path: string): number;
         writeFile(path: string, data: string, writeByteOrderMark?: boolean): void;
-        watchFile?(path: string, callback: FileWatcherCallback): FileWatcher;
+        /**
+         * @pollingInterval - this parameter is used in polling-based watchers and ignored in watchers that
+         * use native OS file watching
+         */
+        watchFile?(path: string, callback: FileWatcherCallback, pollingInterval?: number): FileWatcher;
         watchDirectory?(path: string, callback: DirectoryWatcherCallback, recursive?: boolean): FileWatcher;
         resolvePath(path: string): string;
         fileExists(path: string): boolean;
@@ -28,12 +35,19 @@ namespace ts {
         getDirectories(path: string): string[];
         readDirectory(path: string, extensions?: string[], exclude?: string[], include?: string[]): string[];
         getModifiedTime?(path: string): Date;
+        /**
+         * This should be cryptographically secure.
+         * A good implementation is node.js' `crypto.createHash`. (https://nodejs.org/api/crypto.html#crypto_crypto_createhash_algorithm)
+         */
         createHash?(data: string): string;
         getMemoryUsage?(): number;
         exit(exitCode?: number): void;
         realpath?(path: string): string;
         /*@internal*/ getEnvironmentVariable(name: string): string;
         /*@internal*/ tryEnableSourceMapsForHost?(): void;
+        /*@internal*/ debugMode?: boolean;
+        setTimeout?(callback: (...args: any[]) => void, ms: number, ...args: any[]): any;
+        clearTimeout?(timeoutId: any): void;
     }
 
     export interface FileWatcher {
@@ -45,23 +59,27 @@ namespace ts {
         referenceCount: number;
     }
 
-    declare var require: any;
-    declare var module: any;
-    declare var process: any;
-    declare var global: any;
-    declare var __filename: string;
-    declare var Buffer: {
-        new (str: string, encoding?: string): any;
-    };
+    declare const require: any;
+    declare const process: any;
+    declare const global: any;
+    declare const __filename: string;
 
-    declare class Enumerator {
-        public atEnd(): boolean;
-        public moveNext(): boolean;
-        public item(): any;
-        constructor(o: any);
+    export function getNodeMajorVersion() {
+        if (typeof process === "undefined") {
+            return undefined;
+        }
+        const version: string = process.version;
+        if (!version) {
+            return undefined;
+        }
+        const dot = version.indexOf(".");
+        if (dot === -1) {
+            return undefined;
+        }
+        return parseInt(version.substring(1, dot));
     }
 
-    declare var ChakraHost: {
+    declare const ChakraHost: {
         args: string[];
         currentDirectory: string;
         executingFile: string;
@@ -83,153 +101,7 @@ namespace ts {
         getEnvironmentVariable?(name: string): string;
     };
 
-    export var sys: System = (function() {
-
-        function getWScriptSystem(): System {
-
-            const fso = new ActiveXObject("Scripting.FileSystemObject");
-            const shell = new ActiveXObject("WScript.Shell");
-
-            const fileStream = new ActiveXObject("ADODB.Stream");
-            fileStream.Type = 2 /*text*/;
-
-            const binaryStream = new ActiveXObject("ADODB.Stream");
-            binaryStream.Type = 1 /*binary*/;
-
-            const args: string[] = [];
-            for (let i = 0; i < WScript.Arguments.length; i++) {
-                args[i] = WScript.Arguments.Item(i);
-            }
-
-            function readFile(fileName: string, encoding?: string): string {
-                if (!fso.FileExists(fileName)) {
-                    return undefined;
-                }
-                fileStream.Open();
-                try {
-                    if (encoding) {
-                        fileStream.Charset = encoding;
-                        fileStream.LoadFromFile(fileName);
-                    }
-                    else {
-                        // Load file and read the first two bytes into a string with no interpretation
-                        fileStream.Charset = "x-ansi";
-                        fileStream.LoadFromFile(fileName);
-                        const bom = fileStream.ReadText(2) || "";
-                        // Position must be at 0 before encoding can be changed
-                        fileStream.Position = 0;
-                        // [0xFF,0xFE] and [0xFE,0xFF] mean utf-16 (little or big endian), otherwise default to utf-8
-                        fileStream.Charset = bom.length >= 2 && (bom.charCodeAt(0) === 0xFF && bom.charCodeAt(1) === 0xFE || bom.charCodeAt(0) === 0xFE && bom.charCodeAt(1) === 0xFF) ? "unicode" : "utf-8";
-                    }
-                    // ReadText method always strips byte order mark from resulting string
-                    return fileStream.ReadText();
-                }
-                catch (e) {
-                    throw e;
-                }
-                finally {
-                    fileStream.Close();
-                }
-            }
-
-            function writeFile(fileName: string, data: string, writeByteOrderMark?: boolean): void {
-                fileStream.Open();
-                binaryStream.Open();
-                try {
-                    // Write characters in UTF-8 encoding
-                    fileStream.Charset = "utf-8";
-                    fileStream.WriteText(data);
-                    // If we don't want the BOM, then skip it by setting the starting location to 3 (size of BOM).
-                    // If not, start from position 0, as the BOM will be added automatically when charset==utf8.
-                    if (writeByteOrderMark) {
-                        fileStream.Position = 0;
-                    }
-                    else {
-                        fileStream.Position = 3;
-                    }
-                    fileStream.CopyTo(binaryStream);
-                    binaryStream.SaveToFile(fileName, 2 /*overwrite*/);
-                }
-                finally {
-                    binaryStream.Close();
-                    fileStream.Close();
-                }
-            }
-
-            function getNames(collection: any): string[] {
-                const result: string[] = [];
-                for (let e = new Enumerator(collection); !e.atEnd(); e.moveNext()) {
-                    result.push(e.item().Name);
-                }
-                return result.sort();
-            }
-
-            function getDirectories(path: string): string[] {
-                const folder = fso.GetFolder(path);
-                return getNames(folder.subfolders);
-            }
-
-            function getAccessibleFileSystemEntries(path: string): FileSystemEntries {
-                try {
-                    const folder = fso.GetFolder(path || ".");
-                    const files = getNames(folder.files);
-                    const directories = getNames(folder.subfolders);
-                    return { files, directories };
-                }
-                catch (e) {
-                    return { files: [], directories: [] };
-                }
-            }
-
-            function readDirectory(path: string, extensions?: string[], excludes?: string[], includes?: string[]): string[] {
-                return matchFiles(path, extensions, excludes, includes, /*useCaseSensitiveFileNames*/ false, shell.CurrentDirectory, getAccessibleFileSystemEntries);
-            }
-
-            const wscriptSystem: System = {
-                args,
-                newLine: "\r\n",
-                useCaseSensitiveFileNames: false,
-                write(s: string): void {
-                    WScript.StdOut.Write(s);
-                },
-                readFile,
-                writeFile,
-                resolvePath(path: string): string {
-                    return fso.GetAbsolutePathName(path);
-                },
-                fileExists(path: string): boolean {
-                    return fso.FileExists(path);
-                },
-                directoryExists(path: string) {
-                    return fso.FolderExists(path);
-                },
-                createDirectory(directoryName: string) {
-                    if (!wscriptSystem.directoryExists(directoryName)) {
-                        fso.CreateFolder(directoryName);
-                    }
-                },
-                getExecutingFilePath() {
-                    return WScript.ScriptFullName;
-                },
-                getCurrentDirectory() {
-                    return shell.CurrentDirectory;
-                },
-                getDirectories,
-                getEnvironmentVariable(name: string) {
-                    return new ActiveXObject("WScript.Shell").ExpandEnvironmentStrings(`%${name}%`);
-                },
-                readDirectory,
-                exit(exitCode?: number): void {
-                    try {
-                        WScript.Quit(exitCode);
-                    }
-                    catch (e) {
-                    }
-                }
-            };
-            return wscriptSystem;
-        }
-
+    export let sys: System = (function() {
         function getNodeSystem(): System {
             const _fs = require("fs");
             const _path = require("path");
@@ -241,23 +113,23 @@ namespace ts {
             function createWatchedFileSet() {
                 const dirWatchers = createMap<DirectoryWatcher>();
                 // One file can have multiple watchers
-                const fileWatcherCallbacks = createMap<FileWatcherCallback[]>();
+                const fileWatcherCallbacks = createMultiMap<FileWatcherCallback>();
                 return { addFile, removeFile };
 
                 function reduceDirWatcherRefCountForFile(fileName: string) {
                     const dirName = getDirectoryPath(fileName);
-                    const watcher = dirWatchers[dirName];
+                    const watcher = dirWatchers.get(dirName);
                     if (watcher) {
                         watcher.referenceCount -= 1;
                         if (watcher.referenceCount <= 0) {
                             watcher.close();
-                            delete dirWatchers[dirName];
+                            dirWatchers.delete(dirName);
                         }
                     }
                 }
 
                 function addDirWatcher(dirPath: string): void {
-                    let watcher = dirWatchers[dirPath];
+                    let watcher = dirWatchers.get(dirPath);
                     if (watcher) {
                         watcher.referenceCount += 1;
                         return;
@@ -268,12 +140,12 @@ namespace ts {
                         (eventName: string, relativeFileName: string) => fileEventHandler(eventName, relativeFileName, dirPath)
                     );
                     watcher.referenceCount = 1;
-                    dirWatchers[dirPath] = watcher;
+                    dirWatchers.set(dirPath, watcher);
                     return;
                 }
 
                 function addFileWatcherCallback(filePath: string, callback: FileWatcherCallback): void {
-                    multiMapAdd(fileWatcherCallbacks, filePath, callback);
+                    fileWatcherCallbacks.add(filePath, callback);
                 }
 
                 function addFile(fileName: string, callback: FileWatcherCallback): WatchedFile {
@@ -289,7 +161,7 @@ namespace ts {
                 }
 
                 function removeFileWatcherCallback(filePath: string, callback: FileWatcherCallback) {
-                    multiMapRemove(fileWatcherCallbacks, filePath, callback);
+                    fileWatcherCallbacks.remove(filePath, callback);
                 }
 
                 function fileEventHandler(eventName: string, relativeFileName: string, baseDirPath: string) {
@@ -298,24 +170,35 @@ namespace ts {
                         ? undefined
                         : ts.getNormalizedAbsolutePath(relativeFileName, baseDirPath);
                     // Some applications save a working file via rename operations
-                    if ((eventName === "change" || eventName === "rename") && fileWatcherCallbacks[fileName]) {
-                        for (const fileCallback of fileWatcherCallbacks[fileName]) {
-                            fileCallback(fileName);
+                    if ((eventName === "change" || eventName === "rename")) {
+                        const callbacks = fileWatcherCallbacks.get(fileName);
+                        if (callbacks) {
+                            for (const fileCallback of callbacks) {
+                                fileCallback(fileName);
+                            }
                         }
                     }
                 }
             }
             const watchedFileSet = createWatchedFileSet();
 
-            function isNode4OrLater(): boolean {
-                return parseInt(process.version.charAt(1)) >= 4;
+            const nodeVersion = getNodeMajorVersion();
+            const isNode4OrLater = nodeVersion >= 4;
+
+            function isFileSystemCaseSensitive(): boolean {
+                // win32\win64 are case insensitive platforms
+                if (platform === "win32" || platform === "win64") {
+                    return false;
+                }
+                // convert current file name to upper case / lower case and check if file exists
+                // (guards against cases when name is already all uppercase or lowercase)
+                return !fileExists(__filename.toUpperCase()) || !fileExists(__filename.toLowerCase());
             }
 
             const platform: string = _os.platform();
-            // win32\win64 are case insensitive platforms, MacOS (darwin) by default is also case insensitive
-            const useCaseSensitiveFileNames = platform !== "win32" && platform !== "win64" && platform !== "darwin";
+            const useCaseSensitiveFileNames = isFileSystemCaseSensitive();
 
-            function readFile(fileName: string, encoding?: string): string {
+            function readFile(fileName: string, _encoding?: string): string {
                 if (!fileExists(fileName)) {
                     return undefined;
                 }
@@ -324,7 +207,7 @@ namespace ts {
                 if (len >= 2 && buffer[0] === 0xFE && buffer[1] === 0xFF) {
                     // Big endian UTF-16 byte order mark detected. Since big endian is not supported by node.js,
                     // flip all byte pairs and treat as little endian.
-                    len &= ~1;
+                    len &= ~1; // Round down to a multiple of 2
                     for (let i = 0; i < len; i += 2) {
                         const temp = buffer[i];
                         buffer[i] = buffer[i + 1];
@@ -354,7 +237,7 @@ namespace ts {
 
                 try {
                     fd = _fs.openSync(fileName, "w");
-                    _fs.writeSync(fd, data, undefined, "utf8");
+                    _fs.writeSync(fd, data, /*position*/ undefined, "utf8");
                 }
                 finally {
                     if (fd !== undefined) {
@@ -432,6 +315,7 @@ namespace ts {
                 return filter<string>(_fs.readdirSync(path), dir => fileSystemEntryExists(combinePaths(path, dir), FileSystemEntryKind.Directory));
             }
 
+            const noOpFileWatcher: FileWatcher = { close: noop };
             const nodeSystem: System = {
                 args: process.argv.slice(2),
                 newLine: _os.EOL,
@@ -441,7 +325,7 @@ namespace ts {
                 },
                 readFile,
                 writeFile,
-                watchFile: (fileName, callback) => {
+                watchFile: (fileName, callback, pollingInterval) => {
                     if (useNonPollingWatchers) {
                         const watchedFile = watchedFileSet.addFile(fileName, callback);
                         return {
@@ -449,7 +333,7 @@ namespace ts {
                         };
                     }
                     else {
-                        _fs.watchFile(fileName, { persistent: true, interval: 250 }, fileChanged);
+                        _fs.watchFile(fileName, { persistent: true, interval: pollingInterval || 250 }, fileChanged);
                         return {
                             close: () => _fs.unwatchFile(fileName, fileChanged)
                         };
@@ -467,7 +351,12 @@ namespace ts {
                     // Node 4.0 `fs.watch` function supports the "recursive" option on both OSX and Windows
                     // (ref: https://github.com/nodejs/node/pull/2649 and https://github.com/Microsoft/TypeScript/issues/4643)
                     let options: any;
-                    if (isNode4OrLater() && (process.platform === "win32" || process.platform === "darwin")) {
+                    if (!directoryExists(directoryName)) {
+                        // do nothing if target folder does not exist
+                        return noOpFileWatcher;
+                    }
+
+                    if (isNode4OrLater && (process.platform === "win32" || process.platform === "darwin")) {
                         options = { persistent: true, recursive: !!recursive };
                     }
                     else {
@@ -484,7 +373,7 @@ namespace ts {
                             if (eventName === "rename") {
                                 // When deleting a file, the passed baseFileName is null
                                 callback(!relativeFileName ? relativeFileName : normalizePath(combinePaths(directoryName, relativeFileName)));
-                            };
+                            }
                         }
                     );
                 },
@@ -544,6 +433,7 @@ namespace ts {
                 realpath(path: string): string {
                     return _fs.realpathSync(path);
                 },
+                debugMode: some(<string[]>process.execArgv, arg => /^--(inspect|debug)(-brk)?(=\d+)?$/i.test(arg)),
                 tryEnableSourceMapsForHost() {
                     try {
                         require("source-map-support").install();
@@ -551,7 +441,9 @@ namespace ts {
                     catch (e) {
                         // Could not enable source maps.
                     }
-                }
+                },
+                setTimeout,
+                clearTimeout
             };
             return nodeSystem;
         }
@@ -563,7 +455,7 @@ namespace ts {
                 args: ChakraHost.args,
                 useCaseSensitiveFileNames: !!ChakraHost.useCaseSensitiveFileNames,
                 write: ChakraHost.echo,
-                readFile(path: string, encoding?: string) {
+                readFile(path: string, _encoding?: string) {
                     // encoding is automatically handled by the implementation in ChakraHost
                     return ChakraHost.readFile(path);
                 },
@@ -582,9 +474,9 @@ namespace ts {
                 getExecutingFilePath: () => ChakraHost.executingFile,
                 getCurrentDirectory: () => ChakraHost.currentDirectory,
                 getDirectories: ChakraHost.getDirectories,
-                getEnvironmentVariable: ChakraHost.getEnvironmentVariable || ((name: string) => ""),
+                getEnvironmentVariable: ChakraHost.getEnvironmentVariable || (() => ""),
                 readDirectory: (path: string, extensions?: string[], excludes?: string[], includes?: string[]) => {
-                    const pattern = getFileMatcherPatterns(path, extensions, excludes, includes, !!ChakraHost.useCaseSensitiveFileNames, ChakraHost.currentDirectory);
+                    const pattern = getFileMatcherPatterns(path, excludes, includes, !!ChakraHost.useCaseSensitiveFileNames, ChakraHost.currentDirectory);
                     return ChakraHost.readDirectory(path, extensions, pattern.basePaths, pattern.excludePattern, pattern.includeFilePattern, pattern.includeDirectoryPattern);
                 },
                 exit: ChakraHost.quit,
@@ -607,9 +499,6 @@ namespace ts {
         if (typeof ChakraHost !== "undefined") {
             sys = getChakraSystem();
         }
-        else if (typeof WScript !== "undefined" && typeof ActiveXObject === "function") {
-            sys = getWScriptSystem();
-        }
         else if (typeof process !== "undefined" && process.nextTick && !process.browser && typeof require !== "undefined") {
             // process and process.nextTick checks if current environment is node-like
             // process.browser check excludes webpack and browserify
@@ -628,4 +517,13 @@ namespace ts {
         }
         return sys;
     })();
+
+    if (sys && sys.getEnvironmentVariable) {
+        Debug.currentAssertionLevel = /^development$/i.test(sys.getEnvironmentVariable("NODE_ENV"))
+            ? AssertionLevel.Normal
+            : AssertionLevel.None;
+    }
+    if (sys && sys.debugMode) {
+        Debug.isDebugging = true;
+    }
 }
diff --git a/src/compiler/transformer.ts b/src/compiler/transformer.ts
index 92407af..d61195a 100644
--- a/src/compiler/transformer.ts
+++ b/src/compiler/transformer.ts
@@ -1,127 +1,84 @@
 /// <reference path="visitor.ts" />
+/// <reference path="transformers/utilities.ts" />
 /// <reference path="transformers/ts.ts" />
 /// <reference path="transformers/jsx.ts" />
-/// <reference path="transformers/es7.ts" />
-/// <reference path="transformers/es6.ts" />
+/// <reference path="transformers/esnext.ts" />
+/// <reference path="transformers/es2017.ts" />
+/// <reference path="transformers/es2016.ts" />
+/// <reference path="transformers/es2015.ts" />
 /// <reference path="transformers/generators.ts" />
+/// <reference path="transformers/es5.ts" />
 /// <reference path="transformers/module/module.ts" />
 /// <reference path="transformers/module/system.ts" />
-/// <reference path="transformers/module/es6.ts" />
+/// <reference path="transformers/module/es2015.ts" />
 
 /* @internal */
 namespace ts {
-    const moduleTransformerMap = createMap<Transformer>({
-        [ModuleKind.ES6]: transformES6Module,
-        [ModuleKind.System]: transformSystemModule,
-        [ModuleKind.AMD]: transformModule,
-        [ModuleKind.CommonJS]: transformModule,
-        [ModuleKind.UMD]: transformModule,
-        [ModuleKind.None]: transformModule,
-    });
-
-    const enum SyntaxKindFeatureFlags {
-        Substitution = 1 << 0,
-        EmitNotifications = 1 << 1,
+    function getModuleTransformer(moduleKind: ModuleKind): TransformerFactory<SourceFile> {
+        switch (moduleKind) {
+            case ModuleKind.ESNext:
+            case ModuleKind.ES2015:
+                return transformES2015Module;
+            case ModuleKind.System:
+                return transformSystemModule;
+            default:
+                return transformModule;
+        }
     }
 
-    export interface TransformationResult {
-        /**
-         * Gets the transformed source files.
-         */
-        transformed: SourceFile[];
-
-        /**
-         * Emits the substitute for a node, if one is available; otherwise, emits the node.
-         *
-         * @param emitContext The current emit context.
-         * @param node The node to substitute.
-         * @param emitCallback A callback used to emit the node or its substitute.
-         */
-        emitNodeWithSubstitution(emitContext: EmitContext, node: Node, emitCallback: (emitContext: EmitContext, node: Node) => void): void;
-
-        /**
-         * Emits a node with possible notification.
-         *
-         * @param emitContext The current emit context.
-         * @param node The node to emit.
-         * @param emitCallback A callback used to emit the node.
-         */
-        emitNodeWithNotification(emitContext: EmitContext, node: Node, emitCallback: (emitContext: EmitContext, node: Node) => void): void;
+    const enum TransformationState {
+        Uninitialized,
+        Initialized,
+        Completed,
+        Disposed
     }
 
-    export interface TransformationContext extends LexicalEnvironment {
-        getCompilerOptions(): CompilerOptions;
-        getEmitResolver(): EmitResolver;
-        getEmitHost(): EmitHost;
-
-        /**
-         * Hoists a function declaration to the containing scope.
-         */
-        hoistFunctionDeclaration(node: FunctionDeclaration): void;
-
-        /**
-         * Hoists a variable declaration to the containing scope.
-         */
-        hoistVariableDeclaration(node: Identifier): void;
-
-        /**
-         * Enables expression substitutions in the pretty printer for the provided SyntaxKind.
-         */
-        enableSubstitution(kind: SyntaxKind): void;
-
-        /**
-         * Determines whether expression substitutions are enabled for the provided node.
-         */
-        isSubstitutionEnabled(node: Node): boolean;
-
-        /**
-         * Hook used by transformers to substitute expressions just before they
-         * are emitted by the pretty printer.
-         */
-        onSubstituteNode?: (emitContext: EmitContext, node: Node) => Node;
-
-        /**
-         * Enables before/after emit notifications in the pretty printer for the provided
-         * SyntaxKind.
-         */
-        enableEmitNotification(kind: SyntaxKind): void;
-
-        /**
-         * Determines whether before/after emit notifications should be raised in the pretty
-         * printer when it emits a node.
-         */
-        isEmitNotificationEnabled(node: Node): boolean;
-
-        /**
-         * Hook used to allow transformers to capture state before or after
-         * the printer emits a node.
-         */
-        onEmitNode?: (emitContext: EmitContext, node: Node, emitCallback: (emitContext: EmitContext, node: Node) => void) => void;
+    const enum SyntaxKindFeatureFlags {
+        Substitution = 1 << 0,
+        EmitNotifications = 1 << 1,
     }
 
-    /* @internal */
-    export type Transformer = (context: TransformationContext) => (node: SourceFile) => SourceFile;
-
-    export function getTransformers(compilerOptions: CompilerOptions) {
+    export function getTransformers(compilerOptions: CompilerOptions, customTransformers?: CustomTransformers) {
         const jsx = compilerOptions.jsx;
         const languageVersion = getEmitScriptTarget(compilerOptions);
         const moduleKind = getEmitModuleKind(compilerOptions);
-        const transformers: Transformer[] = [];
+        const transformers: TransformerFactory<SourceFile>[] = [];
+
+        addRange(transformers, customTransformers && customTransformers.before);
 
         transformers.push(transformTypeScript);
-        transformers.push(moduleTransformerMap[moduleKind] || moduleTransformerMap[ModuleKind.None]);
 
         if (jsx === JsxEmit.React) {
             transformers.push(transformJsx);
         }
 
-        transformers.push(transformES7);
+        if (languageVersion < ScriptTarget.ESNext) {
+            transformers.push(transformESNext);
+        }
+
+        if (languageVersion < ScriptTarget.ES2017) {
+            transformers.push(transformES2017);
+        }
+
+        if (languageVersion < ScriptTarget.ES2016) {
+            transformers.push(transformES2016);
+        }
 
-        if (languageVersion < ScriptTarget.ES6) {
-            transformers.push(transformES6);
+        if (languageVersion < ScriptTarget.ES2015) {
+            transformers.push(transformES2015);
             transformers.push(transformGenerators);
         }
 
+        transformers.push(getModuleTransformer(moduleKind));
+
+        // The ES5 transformer is last so that it can substitute expressions like `exports.default`
+        // for ES3.
+        if (languageVersion < ScriptTarget.ES5) {
+            transformers.push(transformES5);
+        }
+
+        addRange(transformers, customTransformers && customTransformers.after);
+
         return transformers;
     }
 
@@ -129,70 +86,95 @@ namespace ts {
      * Transforms an array of SourceFiles by passing them through each transformer.
      *
      * @param resolver The emit resolver provided by the checker.
-     * @param host The emit host.
-     * @param sourceFiles An array of source files
-     * @param transforms An array of Transformers.
+     * @param host The emit host object used to interact with the file system.
+     * @param options Compiler options to surface in the `TransformationContext`.
+     * @param nodes An array of nodes to transform.
+     * @param transforms An array of `TransformerFactory` callbacks.
+     * @param allowDtsFiles A value indicating whether to allow the transformation of .d.ts files.
      */
-    export function transformFiles(resolver: EmitResolver, host: EmitHost, sourceFiles: SourceFile[], transformers: Transformer[]): TransformationResult {
-        const lexicalEnvironmentVariableDeclarationsStack: VariableDeclaration[][] = [];
-        const lexicalEnvironmentFunctionDeclarationsStack: FunctionDeclaration[][] = [];
+    export function transformNodes<T extends Node>(resolver: EmitResolver, host: EmitHost, options: CompilerOptions, nodes: T[], transformers: TransformerFactory<T>[], allowDtsFiles: boolean): TransformationResult<T> {
         const enabledSyntaxKindFeatures = new Array<SyntaxKindFeatureFlags>(SyntaxKind.Count);
-
+        let lexicalEnvironmentVariableDeclarations: VariableDeclaration[];
+        let lexicalEnvironmentFunctionDeclarations: FunctionDeclaration[];
+        let lexicalEnvironmentVariableDeclarationsStack: VariableDeclaration[][] = [];
+        let lexicalEnvironmentFunctionDeclarationsStack: FunctionDeclaration[][] = [];
         let lexicalEnvironmentStackOffset = 0;
-        let hoistedVariableDeclarations: VariableDeclaration[];
-        let hoistedFunctionDeclarations: FunctionDeclaration[];
-        let lexicalEnvironmentDisabled: boolean;
+        let lexicalEnvironmentSuspended = false;
+        let emitHelpers: EmitHelper[];
+        let onSubstituteNode: TransformationContext["onSubstituteNode"] = (_, node) => node;
+        let onEmitNode: TransformationContext["onEmitNode"] = (hint, node, callback) => callback(hint, node);
+        let state = TransformationState.Uninitialized;
 
         // The transformation context is provided to each transformer as part of transformer
         // initialization.
         const context: TransformationContext = {
-            getCompilerOptions: () => host.getCompilerOptions(),
+            getCompilerOptions: () => options,
             getEmitResolver: () => resolver,
             getEmitHost: () => host,
-            hoistVariableDeclaration,
-            hoistFunctionDeclaration,
             startLexicalEnvironment,
+            suspendLexicalEnvironment,
+            resumeLexicalEnvironment,
             endLexicalEnvironment,
-            onSubstituteNode: (emitContext, node) => node,
+            hoistVariableDeclaration,
+            hoistFunctionDeclaration,
+            requestEmitHelper,
+            readEmitHelpers,
             enableSubstitution,
-            isSubstitutionEnabled,
-            onEmitNode: (node, emitContext, emitCallback) => emitCallback(node, emitContext),
             enableEmitNotification,
-            isEmitNotificationEnabled
+            isSubstitutionEnabled,
+            isEmitNotificationEnabled,
+            get onSubstituteNode() { return onSubstituteNode; },
+            set onSubstituteNode(value) {
+                Debug.assert(state < TransformationState.Initialized, "Cannot modify transformation hooks after initialization has completed.");
+                Debug.assert(value !== undefined, "Value must not be 'undefined'");
+                onSubstituteNode = value;
+            },
+            get onEmitNode() { return onEmitNode; },
+            set onEmitNode(value) {
+                Debug.assert(state < TransformationState.Initialized, "Cannot modify transformation hooks after initialization has completed.");
+                Debug.assert(value !== undefined, "Value must not be 'undefined'");
+                onEmitNode = value;
+            }
         };
 
+        // Ensure the parse tree is clean before applying transformations
+        for (const node of nodes) {
+            disposeEmitNodes(getSourceFileOfNode(getParseTreeNode(node)));
+        }
+
+        performance.mark("beforeTransform");
+
         // Chain together and initialize each transformer.
         const transformation = chain(...transformers)(context);
 
-        // Transform each source file.
-        const transformed = map(sourceFiles, transformSourceFile);
+        // prevent modification of transformation hooks.
+        state = TransformationState.Initialized;
 
-        // Disable modification of the lexical environment.
-        lexicalEnvironmentDisabled = true;
+        // Transform each node.
+        const transformed = map(nodes, allowDtsFiles ? transformation : transformRoot);
+
+        // prevent modification of the lexical environment.
+        state = TransformationState.Completed;
+
+        performance.mark("afterTransform");
+        performance.measure("transformTime", "beforeTransform", "afterTransform");
 
         return {
             transformed,
-            emitNodeWithSubstitution,
-            emitNodeWithNotification
+            substituteNode,
+            emitNodeWithNotification,
+            dispose
         };
 
-        /**
-         * Transforms a source file.
-         *
-         * @param sourceFile The source file to transform.
-         */
-        function transformSourceFile(sourceFile: SourceFile) {
-            if (isDeclarationFile(sourceFile)) {
-                return sourceFile;
-            }
-
-            return transformation(sourceFile);
+        function transformRoot(node: T) {
+            return node && (!isSourceFile(node) || !node.isDeclarationFile) ? transformation(node) : node;
         }
 
         /**
          * Enables expression substitutions in the pretty printer for the provided SyntaxKind.
          */
         function enableSubstitution(kind: SyntaxKind) {
+            Debug.assert(state < TransformationState.Completed, "Cannot modify the transformation context after transformation has completed.");
             enabledSyntaxKindFeatures[kind] |= SyntaxKindFeatureFlags.Substitution;
         }
 
@@ -207,28 +189,20 @@ namespace ts {
         /**
          * Emits a node with possible substitution.
          *
-         * @param emitContext The current emit context.
+         * @param hint A hint as to the intended usage of the node.
          * @param node The node to emit.
          * @param emitCallback The callback used to emit the node or its substitute.
          */
-        function emitNodeWithSubstitution(emitContext: EmitContext, node: Node, emitCallback: (emitContext: EmitContext, node: Node) => void) {
-            if (node) {
-                if (isSubstitutionEnabled(node)) {
-                    const substitute = context.onSubstituteNode(emitContext, node);
-                    if (substitute && substitute !== node) {
-                        emitCallback(emitContext, substitute);
-                        return;
-                    }
-                }
-
-                emitCallback(emitContext, node);
-            }
+        function substituteNode(hint: EmitHint, node: Node) {
+            Debug.assert(state < TransformationState.Disposed, "Cannot substitute a node after the result is disposed.");
+            return node && isSubstitutionEnabled(node) && onSubstituteNode(hint, node) || node;
         }
 
         /**
          * Enables before/after emit notifications in the pretty printer for the provided SyntaxKind.
          */
         function enableEmitNotification(kind: SyntaxKind) {
+            Debug.assert(state < TransformationState.Completed, "Cannot modify the transformation context after transformation has completed.");
             enabledSyntaxKindFeatures[kind] |= SyntaxKindFeatureFlags.EmitNotifications;
         }
 
@@ -244,17 +218,18 @@ namespace ts {
         /**
          * Emits a node with possible emit notification.
          *
-         * @param emitContext The current emit context.
+         * @param hint A hint as to the intended usage of the node.
          * @param node The node to emit.
          * @param emitCallback The callback used to emit the node.
          */
-        function emitNodeWithNotification(emitContext: EmitContext, node: Node, emitCallback: (emitContext: EmitContext, node: Node) => void) {
+        function emitNodeWithNotification(hint: EmitHint, node: Node, emitCallback: (hint: EmitHint, node: Node) => void) {
+            Debug.assert(state < TransformationState.Disposed, "Cannot invoke TransformationResult callbacks after the result is disposed.");
             if (node) {
                 if (isEmitNotificationEnabled(node)) {
-                    context.onEmitNode(emitContext, node, emitCallback);
+                    onEmitNode(hint, node, emitCallback);
                 }
                 else {
-                    emitCallback(emitContext, node);
+                    emitCallback(hint, node);
                 }
             }
         }
@@ -263,13 +238,14 @@ namespace ts {
          * Records a hoisted variable declaration for the provided name within a lexical environment.
          */
         function hoistVariableDeclaration(name: Identifier): void {
-            Debug.assert(!lexicalEnvironmentDisabled, "Cannot modify the lexical environment during the print phase.");
-            const decl = createVariableDeclaration(name);
-            if (!hoistedVariableDeclarations) {
-                hoistedVariableDeclarations = [decl];
+            Debug.assert(state > TransformationState.Uninitialized, "Cannot modify the lexical environment during initialization.");
+            Debug.assert(state < TransformationState.Completed, "Cannot modify the lexical environment after transformation has completed.");
+            const decl = setEmitFlags(createVariableDeclaration(name), EmitFlags.NoNestedSourceMaps);
+            if (!lexicalEnvironmentVariableDeclarations) {
+                lexicalEnvironmentVariableDeclarations = [decl];
             }
             else {
-                hoistedVariableDeclarations.push(decl);
+                lexicalEnvironmentVariableDeclarations.push(decl);
             }
         }
 
@@ -277,12 +253,13 @@ namespace ts {
          * Records a hoisted function declaration within a lexical environment.
          */
         function hoistFunctionDeclaration(func: FunctionDeclaration): void {
-            Debug.assert(!lexicalEnvironmentDisabled, "Cannot modify the lexical environment during the print phase.");
-            if (!hoistedFunctionDeclarations) {
-                hoistedFunctionDeclarations = [func];
+            Debug.assert(state > TransformationState.Uninitialized, "Cannot modify the lexical environment during initialization.");
+            Debug.assert(state < TransformationState.Completed, "Cannot modify the lexical environment after transformation has completed.");
+            if (!lexicalEnvironmentFunctionDeclarations) {
+                lexicalEnvironmentFunctionDeclarations = [func];
             }
             else {
-                hoistedFunctionDeclarations.push(func);
+                lexicalEnvironmentFunctionDeclarations.push(func);
             }
         }
 
@@ -291,17 +268,35 @@ namespace ts {
          * are pushed onto a stack, and the related storage variables are reset.
          */
         function startLexicalEnvironment(): void {
-            Debug.assert(!lexicalEnvironmentDisabled, "Cannot start a lexical environment during the print phase.");
+            Debug.assert(state > TransformationState.Uninitialized, "Cannot modify the lexical environment during initialization.");
+            Debug.assert(state < TransformationState.Completed, "Cannot modify the lexical environment after transformation has completed.");
+            Debug.assert(!lexicalEnvironmentSuspended, "Lexical environment is suspended.");
 
             // Save the current lexical environment. Rather than resizing the array we adjust the
             // stack size variable. This allows us to reuse existing array slots we've
             // already allocated between transformations to avoid allocation and GC overhead during
             // transformation.
-            lexicalEnvironmentVariableDeclarationsStack[lexicalEnvironmentStackOffset] = hoistedVariableDeclarations;
-            lexicalEnvironmentFunctionDeclarationsStack[lexicalEnvironmentStackOffset] = hoistedFunctionDeclarations;
+            lexicalEnvironmentVariableDeclarationsStack[lexicalEnvironmentStackOffset] = lexicalEnvironmentVariableDeclarations;
+            lexicalEnvironmentFunctionDeclarationsStack[lexicalEnvironmentStackOffset] = lexicalEnvironmentFunctionDeclarations;
             lexicalEnvironmentStackOffset++;
-            hoistedVariableDeclarations = undefined;
-            hoistedFunctionDeclarations = undefined;
+            lexicalEnvironmentVariableDeclarations = undefined;
+            lexicalEnvironmentFunctionDeclarations = undefined;
+        }
+
+        /** Suspends the current lexical environment, usually after visiting a parameter list. */
+        function suspendLexicalEnvironment(): void {
+            Debug.assert(state > TransformationState.Uninitialized, "Cannot modify the lexical environment during initialization.");
+            Debug.assert(state < TransformationState.Completed, "Cannot modify the lexical environment after transformation has completed.");
+            Debug.assert(!lexicalEnvironmentSuspended, "Lexical environment is already suspended.");
+            lexicalEnvironmentSuspended = true;
+        }
+
+        /** Resumes a suspended lexical environment, usually before visiting a function body. */
+        function resumeLexicalEnvironment(): void {
+            Debug.assert(state > TransformationState.Uninitialized, "Cannot modify the lexical environment during initialization.");
+            Debug.assert(state < TransformationState.Completed, "Cannot modify the lexical environment after transformation has completed.");
+            Debug.assert(lexicalEnvironmentSuspended, "Lexical environment is not suspended.");
+            lexicalEnvironmentSuspended = false;
         }
 
         /**
@@ -309,18 +304,20 @@ namespace ts {
          * any hoisted declarations added in this environment are returned.
          */
         function endLexicalEnvironment(): Statement[] {
-            Debug.assert(!lexicalEnvironmentDisabled, "Cannot end a lexical environment during the print phase.");
+            Debug.assert(state > TransformationState.Uninitialized, "Cannot modify the lexical environment during initialization.");
+            Debug.assert(state < TransformationState.Completed, "Cannot modify the lexical environment after transformation has completed.");
+            Debug.assert(!lexicalEnvironmentSuspended, "Lexical environment is suspended.");
 
             let statements: Statement[];
-            if (hoistedVariableDeclarations || hoistedFunctionDeclarations) {
-                if (hoistedFunctionDeclarations) {
-                    statements = [...hoistedFunctionDeclarations];
+            if (lexicalEnvironmentVariableDeclarations || lexicalEnvironmentFunctionDeclarations) {
+                if (lexicalEnvironmentFunctionDeclarations) {
+                    statements = [...lexicalEnvironmentFunctionDeclarations];
                 }
 
-                if (hoistedVariableDeclarations) {
+                if (lexicalEnvironmentVariableDeclarations) {
                     const statement = createVariableStatement(
                         /*modifiers*/ undefined,
-                        createVariableDeclarationList(hoistedVariableDeclarations)
+                        createVariableDeclarationList(lexicalEnvironmentVariableDeclarations)
                     );
 
                     if (!statements) {
@@ -334,9 +331,49 @@ namespace ts {
 
             // Restore the previous lexical environment.
             lexicalEnvironmentStackOffset--;
-            hoistedVariableDeclarations = lexicalEnvironmentVariableDeclarationsStack[lexicalEnvironmentStackOffset];
-            hoistedFunctionDeclarations = lexicalEnvironmentFunctionDeclarationsStack[lexicalEnvironmentStackOffset];
+            lexicalEnvironmentVariableDeclarations = lexicalEnvironmentVariableDeclarationsStack[lexicalEnvironmentStackOffset];
+            lexicalEnvironmentFunctionDeclarations = lexicalEnvironmentFunctionDeclarationsStack[lexicalEnvironmentStackOffset];
+            if (lexicalEnvironmentStackOffset === 0) {
+                lexicalEnvironmentVariableDeclarationsStack = [];
+                lexicalEnvironmentFunctionDeclarationsStack = [];
+            }
             return statements;
         }
+
+        function requestEmitHelper(helper: EmitHelper): void {
+            Debug.assert(state > TransformationState.Uninitialized, "Cannot modify the transformation context during initialization.");
+            Debug.assert(state < TransformationState.Completed, "Cannot modify the transformation context after transformation has completed.");
+            Debug.assert(!helper.scoped, "Cannot request a scoped emit helper.");
+            emitHelpers = append(emitHelpers, helper);
+        }
+
+        function readEmitHelpers(): EmitHelper[] | undefined {
+            Debug.assert(state > TransformationState.Uninitialized, "Cannot modify the transformation context during initialization.");
+            Debug.assert(state < TransformationState.Completed, "Cannot modify the transformation context after transformation has completed.");
+            const helpers = emitHelpers;
+            emitHelpers = undefined;
+            return helpers;
+        }
+
+        function dispose() {
+            if (state < TransformationState.Disposed) {
+                // Clean up emit nodes on parse tree
+                for (const node of nodes) {
+                    disposeEmitNodes(getSourceFileOfNode(getParseTreeNode(node)));
+                }
+
+                // Release references to external entries for GC purposes.
+                lexicalEnvironmentVariableDeclarations = undefined;
+                lexicalEnvironmentVariableDeclarationsStack = undefined;
+                lexicalEnvironmentFunctionDeclarations = undefined;
+                lexicalEnvironmentFunctionDeclarationsStack = undefined;
+                onSubstituteNode = undefined;
+                onEmitNode = undefined;
+                emitHelpers = undefined;
+
+                // Prevent further use of the transformation result.
+                state = TransformationState.Disposed;
+            }
+        }
     }
-}
\ No newline at end of file
+}
diff --git a/src/compiler/transformers/destructuring.ts b/src/compiler/transformers/destructuring.ts
index 3bfa778..cd3b8bd 100644
--- a/src/compiler/transformers/destructuring.ts
+++ b/src/compiler/transformers/destructuring.ts
@@ -3,412 +3,420 @@
 
 /*@internal*/
 namespace ts {
+    interface FlattenContext {
+        context: TransformationContext;
+        level: FlattenLevel;
+        downlevelIteration: boolean;
+        hoistTempVariables: boolean;
+        emitExpression: (value: Expression) => void;
+        emitBindingOrAssignment: (target: BindingOrAssignmentElementTarget, value: Expression, location: TextRange, original: Node) => void;
+        createArrayBindingOrAssignmentPattern: (elements: BindingOrAssignmentElement[]) => ArrayBindingOrAssignmentPattern;
+        createObjectBindingOrAssignmentPattern: (elements: BindingOrAssignmentElement[]) => ObjectBindingOrAssignmentPattern;
+        createArrayBindingOrAssignmentElement: (node: Identifier) => BindingOrAssignmentElement;
+        visitor?: (node: Node) => VisitResult<Node>;
+    }
+
+    export const enum FlattenLevel {
+        All,
+        ObjectRest,
+    }
+
     /**
-     * Flattens a destructuring assignment expression.
+     * Flattens a DestructuringAssignment or a VariableDeclaration to an expression.
      *
-     * @param root The destructuring assignment expression.
-     * @param needsValue Indicates whether the value from the right-hand-side of the
-     *                   destructuring assignment is needed as part of a larger expression.
-     * @param recordTempVariable A callback used to record new temporary variables.
-     * @param visitor An optional visitor to use to visit expressions.
+     * @param node The node to flatten.
+     * @param visitor An optional visitor used to visit initializers.
+     * @param context The transformation context.
+     * @param level Indicates the extent to which flattening should occur.
+     * @param needsValue An optional value indicating whether the value from the right-hand-side of
+     * the destructuring assignment is needed as part of a larger expression.
+     * @param createAssignmentCallback An optional callback used to create the assignment expression.
      */
     export function flattenDestructuringAssignment(
+        node: VariableDeclaration | DestructuringAssignment,
+        visitor: ((node: Node) => VisitResult<Node>) | undefined,
         context: TransformationContext,
-        node: BinaryExpression,
-        needsValue: boolean,
-        recordTempVariable: (node: Identifier) => void,
-        visitor?: (node: Node) => VisitResult<Node>): Expression {
+        level: FlattenLevel,
+        needsValue?: boolean,
+        createAssignmentCallback?: (name: Identifier, value: Expression, location?: TextRange) => Expression): Expression {
+        let location: TextRange = node;
+        let value: Expression;
+        if (isDestructuringAssignment(node)) {
+            value = node.right;
+            while (isEmptyArrayLiteral(node.left) || isEmptyObjectLiteral(node.left)) {
+                if (isDestructuringAssignment(value)) {
+                    location = node = value;
+                    value = node.right;
+                }
+                else {
+                    return value;
+                }
+            }
+        }
 
-        if (isEmptyObjectLiteralOrArrayLiteral(node.left)) {
-            const right = node.right;
-            if (isDestructuringAssignment(right)) {
-                return flattenDestructuringAssignment(context, right, needsValue, recordTempVariable, visitor);
+        let expressions: Expression[];
+        const flattenContext: FlattenContext = {
+            context,
+            level,
+            downlevelIteration: context.getCompilerOptions().downlevelIteration,
+            hoistTempVariables: true,
+            emitExpression,
+            emitBindingOrAssignment,
+            createArrayBindingOrAssignmentPattern: makeArrayAssignmentPattern,
+            createObjectBindingOrAssignmentPattern: makeObjectAssignmentPattern,
+            createArrayBindingOrAssignmentElement: makeAssignmentElement,
+            visitor
+        };
+
+        if (value) {
+            value = visitNode(value, visitor, isExpression);
+            if (needsValue) {
+                // If the right-hand value of the destructuring assignment needs to be preserved (as
+                // is the case when the destructuring assignment is part of a larger expression),
+                // then we need to cache the right-hand value.
+                //
+                // The source map location for the assignment should point to the entire binary
+                // expression.
+                value = ensureIdentifier(flattenContext, value, /*reuseIdentifierExpressions*/ true, location);
             }
-            else {
-                return node.right;
+            else if (nodeIsSynthesized(node)) {
+                // Generally, the source map location for a destructuring assignment is the root
+                // expression.
+                //
+                // However, if the root expression is synthesized (as in the case
+                // of the initializer when transforming a ForOfStatement), then the source map
+                // location should point to the right-hand value of the expression.
+                location = value;
             }
         }
 
-        let location: TextRange = node;
-        let value = node.right;
-        const expressions: Expression[] = [];
-        if (needsValue) {
-            // If the right-hand value of the destructuring assignment needs to be preserved (as
-            // is the case when the destructuring assignmen) is part of a larger expression),
-            // then we need to cache the right-hand value.
-            //
-            // The source map location for the assignment should point to the entire binary
-            // expression.
-            value = ensureIdentifier(value, /*reuseIdentifierExpressions*/ true, location, emitTempVariableAssignment, visitor);
-        }
-        else if (nodeIsSynthesized(node)) {
-            // Generally, the source map location for a destructuring assignment is the root
-            // expression.
-            //
-            // However, if the root expression is synthesized (as in the case
-            // of the initializer when transforming a ForOfStatement), then the source map
-            // location should point to the right-hand value of the expression.
-            location = value;
-        }
+        flattenBindingOrAssignmentElement(flattenContext, node, value, location, /*skipInitializer*/ isDestructuringAssignment(node));
 
-        flattenDestructuring(context, node, value, location, emitAssignment, emitTempVariableAssignment, visitor);
+        if (value && needsValue) {
+            if (!some(expressions)) {
+                return value;
+            }
 
-        if (needsValue) {
             expressions.push(value);
         }
 
-        const expression = inlineExpressions(expressions);
-        aggregateTransformFlags(expression);
-        return expression;
-
-        function emitAssignment(name: Identifier, value: Expression, location: TextRange) {
-            const expression = createAssignment(name, value, location);
+        return aggregateTransformFlags(inlineExpressions(expressions)) || createOmittedExpression();
 
+        function emitExpression(expression: Expression) {
             // NOTE: this completely disables source maps, but aligns with the behavior of
             //       `emitAssignment` in the old emitter.
             setEmitFlags(expression, EmitFlags.NoNestedSourceMaps);
-
             aggregateTransformFlags(expression);
-            expressions.push(expression);
+            expressions = append(expressions, expression);
         }
 
-        function emitTempVariableAssignment(value: Expression, location: TextRange) {
-            const name = createTempVariable(recordTempVariable);
-            emitAssignment(name, value, location);
-            return name;
+        function emitBindingOrAssignment(target: BindingOrAssignmentElementTarget, value: Expression, location: TextRange, original: Node) {
+            Debug.assertNode(target, createAssignmentCallback ? isIdentifier : isExpression);
+            const expression = createAssignmentCallback
+                ? createAssignmentCallback(<Identifier>target, value, location)
+                : setTextRange(
+                    createAssignment(visitNode(<Expression>target, visitor, isExpression), value),
+                    location
+                );
+            expression.original = original;
+            emitExpression(expression);
         }
     }
 
     /**
-     * Flattens binding patterns in a parameter declaration.
+     * Flattens a VariableDeclaration or ParameterDeclaration to one or more variable declarations.
      *
-     * @param node The ParameterDeclaration to flatten.
-     * @param value The rhs value for the binding pattern.
-     * @param visitor An optional visitor to use to visit expressions.
+     * @param node The node to flatten.
+     * @param visitor An optional visitor used to visit initializers.
+     * @param context The transformation context.
+     * @param boundValue The value bound to the declaration.
+     * @param skipInitializer A value indicating whether to ignore the initializer of `node`.
+     * @param hoistTempVariables Indicates whether temporary variables should not be recorded in-line.
+     * @param level Indicates the extent to which flattening should occur.
      */
-    export function flattenParameterDestructuring(
+    export function flattenDestructuringBinding(
+        node: VariableDeclaration | ParameterDeclaration,
+        visitor: (node: Node) => VisitResult<Node>,
         context: TransformationContext,
-        node: ParameterDeclaration,
-        value: Expression,
-        visitor?: (node: Node) => VisitResult<Node>) {
+        level: FlattenLevel,
+        rval?: Expression,
+        hoistTempVariables?: boolean,
+        skipInitializer?: boolean): VariableDeclaration[] {
+        let pendingExpressions: Expression[];
+        const pendingDeclarations: { pendingExpressions?: Expression[], name: BindingName, value: Expression, location?: TextRange, original?: Node; }[] = [];
         const declarations: VariableDeclaration[] = [];
-
-        flattenDestructuring(context, node, value, node, emitAssignment, emitTempVariableAssignment, visitor);
-
+        const flattenContext: FlattenContext = {
+            context,
+            level,
+            downlevelIteration: context.getCompilerOptions().downlevelIteration,
+            hoistTempVariables,
+            emitExpression,
+            emitBindingOrAssignment,
+            createArrayBindingOrAssignmentPattern: makeArrayBindingPattern,
+            createObjectBindingOrAssignmentPattern: makeObjectBindingPattern,
+            createArrayBindingOrAssignmentElement: makeBindingElement,
+            visitor
+        };
+        flattenBindingOrAssignmentElement(flattenContext, node, rval, node, skipInitializer);
+        if (pendingExpressions) {
+            const temp = createTempVariable(/*recordTempVariable*/ undefined);
+            if (hoistTempVariables) {
+                const value = inlineExpressions(pendingExpressions);
+                pendingExpressions = undefined;
+                emitBindingOrAssignment(temp, value, /*location*/ undefined, /*original*/ undefined);
+            }
+            else {
+                context.hoistVariableDeclaration(temp);
+                const pendingDeclaration = lastOrUndefined(pendingDeclarations);
+                pendingDeclaration.pendingExpressions = append(
+                    pendingDeclaration.pendingExpressions,
+                    createAssignment(temp, pendingDeclaration.value)
+                );
+                addRange(pendingDeclaration.pendingExpressions, pendingExpressions);
+                pendingDeclaration.value = temp;
+            }
+        }
+        for (const { pendingExpressions, name, value, location, original } of pendingDeclarations) {
+            const variable = createVariableDeclaration(
+                name,
+                /*type*/ undefined,
+                pendingExpressions ? inlineExpressions(append(pendingExpressions, value)) : value
+            );
+            variable.original = original;
+            setTextRange(variable, location);
+            if (isIdentifier(name)) {
+                setEmitFlags(variable, EmitFlags.NoNestedSourceMaps);
+            }
+            aggregateTransformFlags(variable);
+            declarations.push(variable);
+        }
         return declarations;
 
-        function emitAssignment(name: Identifier, value: Expression, location: TextRange) {
-            const declaration = createVariableDeclaration(name, /*type*/ undefined, value, location);
-
-            // NOTE: this completely disables source maps, but aligns with the behavior of
-            //       `emitAssignment` in the old emitter.
-            setEmitFlags(declaration, EmitFlags.NoNestedSourceMaps);
-
-            aggregateTransformFlags(declaration);
-            declarations.push(declaration);
+        function emitExpression(value: Expression) {
+            pendingExpressions = append(pendingExpressions, value);
         }
 
-        function emitTempVariableAssignment(value: Expression, location: TextRange) {
-            const name = createTempVariable(/*recordTempVariable*/ undefined);
-            emitAssignment(name, value, location);
-            return name;
+        function emitBindingOrAssignment(target: BindingOrAssignmentElementTarget, value: Expression, location: TextRange, original: Node) {
+            Debug.assertNode(target, isBindingName);
+            if (pendingExpressions) {
+                value = inlineExpressions(append(pendingExpressions, value));
+                pendingExpressions = undefined;
+            }
+            pendingDeclarations.push({ pendingExpressions, name: <BindingName>target, value, location, original });
         }
     }
 
     /**
-     * Flattens binding patterns in a variable declaration.
+     * Flattens a BindingOrAssignmentElement into zero or more bindings or assignments.
      *
-     * @param node The VariableDeclaration to flatten.
-     * @param value An optional rhs value for the binding pattern.
-     * @param visitor An optional visitor to use to visit expressions.
+     * @param flattenContext Options used to control flattening.
+     * @param element The element to flatten.
+     * @param value The current RHS value to assign to the element.
+     * @param location The location to use for source maps and comments.
+     * @param skipInitializer An optional value indicating whether to include the initializer
+     * for the element.
      */
-    export function flattenVariableDestructuring(
-        context: TransformationContext,
-        node: VariableDeclaration,
-        value?: Expression,
-        visitor?: (node: Node) => VisitResult<Node>,
-        recordTempVariable?: (node: Identifier) => void) {
-        const declarations: VariableDeclaration[] = [];
-
-        let pendingAssignments: Expression[];
-        flattenDestructuring(context, node, value, node, emitAssignment, emitTempVariableAssignment, visitor);
-
-        return declarations;
-
-        function emitAssignment(name: Identifier, value: Expression, location: TextRange, original: Node) {
-            if (pendingAssignments) {
-                pendingAssignments.push(value);
-                value = inlineExpressions(pendingAssignments);
-                pendingAssignments = undefined;
+    function flattenBindingOrAssignmentElement(
+        flattenContext: FlattenContext,
+        element: BindingOrAssignmentElement,
+        value: Expression | undefined,
+        location: TextRange,
+        skipInitializer?: boolean) {
+        if (!skipInitializer) {
+            const initializer = visitNode(getInitializerOfBindingOrAssignmentElement(element), flattenContext.visitor, isExpression);
+            if (initializer) {
+                // Combine value and initializer
+                value = value ? createDefaultValueCheck(flattenContext, value, initializer, location) : initializer;
             }
-
-            const declaration = createVariableDeclaration(name, /*type*/ undefined, value, location);
-            declaration.original = original;
-
-            // NOTE: this completely disables source maps, but aligns with the behavior of
-            //       `emitAssignment` in the old emitter.
-            setEmitFlags(declaration, EmitFlags.NoNestedSourceMaps);
-
-            declarations.push(declaration);
-            aggregateTransformFlags(declaration);
+            else if (!value) {
+                // Use 'void 0' in absence of value and initializer
+                value = createVoidZero();
+            }
+        }
+        const bindingTarget = getTargetOfBindingOrAssignmentElement(element);
+        if (isObjectBindingOrAssignmentPattern(bindingTarget)) {
+            flattenObjectBindingOrAssignmentPattern(flattenContext, element, bindingTarget, value, location);
+        }
+        else if (isArrayBindingOrAssignmentPattern(bindingTarget)) {
+            flattenArrayBindingOrAssignmentPattern(flattenContext, element, bindingTarget, value, location);
         }
+        else {
+            flattenContext.emitBindingOrAssignment(bindingTarget, value, location, /*original*/ element);
+        }
+    }
 
-        function emitTempVariableAssignment(value: Expression, location: TextRange) {
-            const name = createTempVariable(recordTempVariable);
-            if (recordTempVariable) {
-                const assignment = createAssignment(name, value, location);
-                if (pendingAssignments) {
-                    pendingAssignments.push(assignment);
+    /**
+     * Flattens an ObjectBindingOrAssignmentPattern into zero or more bindings or assignments.
+     *
+     * @param flattenContext Options used to control flattening.
+     * @param parent The parent element of the pattern.
+     * @param pattern The ObjectBindingOrAssignmentPattern to flatten.
+     * @param value The current RHS value to assign to the element.
+     * @param location The location to use for source maps and comments.
+     */
+    function flattenObjectBindingOrAssignmentPattern(flattenContext: FlattenContext, parent: BindingOrAssignmentElement, pattern: ObjectBindingOrAssignmentPattern, value: Expression, location: TextRange) {
+        const elements = getElementsOfBindingOrAssignmentPattern(pattern);
+        const numElements = elements.length;
+        if (numElements !== 1) {
+            // For anything other than a single-element destructuring we need to generate a temporary
+            // to ensure value is evaluated exactly once. Additionally, if we have zero elements
+            // we need to emit *something* to ensure that in case a 'var' keyword was already emitted,
+            // so in that case, we'll intentionally create that temporary.
+            const reuseIdentifierExpressions = !isDeclarationBindingElement(parent) || numElements !== 0;
+            value = ensureIdentifier(flattenContext, value, reuseIdentifierExpressions, location);
+        }
+        let bindingElements: BindingOrAssignmentElement[];
+        let computedTempVariables: Expression[];
+        for (let i = 0; i < numElements; i++) {
+            const element = elements[i];
+            if (!getRestIndicatorOfBindingOrAssignmentElement(element)) {
+                const propertyName = getPropertyNameOfBindingOrAssignmentElement(element);
+                if (flattenContext.level >= FlattenLevel.ObjectRest
+                    && !(element.transformFlags & (TransformFlags.ContainsRest | TransformFlags.ContainsObjectRest))
+                    && !(getTargetOfBindingOrAssignmentElement(element).transformFlags & (TransformFlags.ContainsRest | TransformFlags.ContainsObjectRest))
+                    && !isComputedPropertyName(propertyName)) {
+                    bindingElements = append(bindingElements, element);
                 }
                 else {
-                    pendingAssignments = [assignment];
+                    if (bindingElements) {
+                        flattenContext.emitBindingOrAssignment(flattenContext.createObjectBindingOrAssignmentPattern(bindingElements), value, location, pattern);
+                        bindingElements = undefined;
+                    }
+                    const rhsValue = createDestructuringPropertyAccess(flattenContext, value, propertyName);
+                    if (isComputedPropertyName(propertyName)) {
+                        computedTempVariables = append(computedTempVariables, (rhsValue as ElementAccessExpression).argumentExpression);
+                    }
+                    flattenBindingOrAssignmentElement(flattenContext, element, rhsValue, /*location*/ element);
                 }
             }
-            else {
-                emitAssignment(name, value, location, /*original*/ undefined);
+            else if (i === numElements - 1) {
+                if (bindingElements) {
+                    flattenContext.emitBindingOrAssignment(flattenContext.createObjectBindingOrAssignmentPattern(bindingElements), value, location, pattern);
+                    bindingElements = undefined;
+                }
+                const rhsValue = createRestCall(flattenContext.context, value, elements, computedTempVariables, pattern);
+                flattenBindingOrAssignmentElement(flattenContext, element, rhsValue, element);
             }
-            return name;
+        }
+        if (bindingElements) {
+            flattenContext.emitBindingOrAssignment(flattenContext.createObjectBindingOrAssignmentPattern(bindingElements), value, location, pattern);
         }
     }
 
     /**
-     * Flattens binding patterns in a variable declaration and transforms them into an expression.
+     * Flattens an ArrayBindingOrAssignmentPattern into zero or more bindings or assignments.
      *
-     * @param node The VariableDeclaration to flatten.
-     * @param recordTempVariable A callback used to record new temporary variables.
-     * @param nameSubstitution An optional callback used to substitute binding names.
-     * @param visitor An optional visitor to use to visit expressions.
+     * @param flattenContext Options used to control flattening.
+     * @param parent The parent element of the pattern.
+     * @param pattern The ArrayBindingOrAssignmentPattern to flatten.
+     * @param value The current RHS value to assign to the element.
+     * @param location The location to use for source maps and comments.
      */
-    export function flattenVariableDestructuringToExpression(
-        context: TransformationContext,
-        node: VariableDeclaration,
-        recordTempVariable: (name: Identifier) => void,
-        nameSubstitution?: (name: Identifier) => Expression,
-        visitor?: (node: Node) => VisitResult<Node>) {
-
-        const pendingAssignments: Expression[] = [];
-
-        flattenDestructuring(context, node, /*value*/ undefined, node, emitAssignment, emitTempVariableAssignment, visitor);
-
-        const expression = inlineExpressions(pendingAssignments);
-        aggregateTransformFlags(expression);
-        return expression;
-
-        function emitAssignment(name: Identifier, value: Expression, location: TextRange, original: Node) {
-            const left = nameSubstitution && nameSubstitution(name) || name;
-            emitPendingAssignment(left, value, location, original);
-        }
-
-        function emitTempVariableAssignment(value: Expression, location: TextRange) {
-            const name = createTempVariable(recordTempVariable);
-            emitPendingAssignment(name, value, location, /*original*/ undefined);
-            return name;
-        }
-
-        function emitPendingAssignment(name: Expression, value: Expression, location: TextRange, original: Node) {
-            const expression = createAssignment(name, value, location);
-            expression.original = original;
-
-            // NOTE: this completely disables source maps, but aligns with the behavior of
-            //       `emitAssignment` in the old emitter.
-            setEmitFlags(expression, EmitFlags.NoNestedSourceMaps);
-
-            pendingAssignments.push(expression);
-            return expression;
-        }
-    }
-
-    function flattenDestructuring(
-        context: TransformationContext,
-        root: BindingElement | BinaryExpression,
-        value: Expression,
-        location: TextRange,
-        emitAssignment: (name: Identifier, value: Expression, location: TextRange, original: Node) => void,
-        emitTempVariableAssignment: (value: Expression, location: TextRange) => Identifier,
-        visitor?: (node: Node) => VisitResult<Node>) {
-        if (value && visitor) {
-            value = visitNode(value, visitor, isExpression);
-        }
-
-        if (isBinaryExpression(root)) {
-            emitDestructuringAssignment(root.left, value, location);
+    function flattenArrayBindingOrAssignmentPattern(flattenContext: FlattenContext, parent: BindingOrAssignmentElement, pattern: ArrayBindingOrAssignmentPattern, value: Expression, location: TextRange) {
+        const elements = getElementsOfBindingOrAssignmentPattern(pattern);
+        const numElements = elements.length;
+        if (flattenContext.level < FlattenLevel.ObjectRest && flattenContext.downlevelIteration) {
+            // Read the elements of the iterable into an array
+            value = ensureIdentifier(
+                flattenContext,
+                createReadHelper(
+                    flattenContext.context,
+                    value,
+                    numElements > 0 && getRestIndicatorOfBindingOrAssignmentElement(elements[numElements - 1])
+                        ? undefined
+                        : numElements,
+                    location
+                ),
+                /*reuseIdentifierExpressions*/ false,
+                location
+            );
         }
-        else {
-            emitBindingElement(root, value);
+        else if (numElements !== 1 && (flattenContext.level < FlattenLevel.ObjectRest || numElements === 0)) {
+            // For anything other than a single-element destructuring we need to generate a temporary
+            // to ensure value is evaluated exactly once. Additionally, if we have zero elements
+            // we need to emit *something* to ensure that in case a 'var' keyword was already emitted,
+            // so in that case, we'll intentionally create that temporary.
+            const reuseIdentifierExpressions = !isDeclarationBindingElement(parent) || numElements !== 0;
+            value = ensureIdentifier(flattenContext, value, reuseIdentifierExpressions, location);
         }
+        let bindingElements: BindingOrAssignmentElement[];
+        let restContainingElements: [Identifier, BindingOrAssignmentElement][];
+        for (let i = 0; i < numElements; i++) {
+            const element = elements[i];
+            if (flattenContext.level >= FlattenLevel.ObjectRest) {
+                // If an array pattern contains an ObjectRest, we must cache the result so that we
+                // can perform the ObjectRest destructuring in a different declaration
+                if (element.transformFlags & TransformFlags.ContainsObjectRest) {
+                    const temp = createTempVariable(/*recordTempVariable*/ undefined);
+                    if (flattenContext.hoistTempVariables) {
+                        flattenContext.context.hoistVariableDeclaration(temp);
+                    }
 
-        function emitDestructuringAssignment(bindingTarget: Expression | ShorthandPropertyAssignment, value: Expression, location: TextRange) {
-            // When emitting target = value use source map node to highlight, including any temporary assignments needed for this
-            let target: Expression;
-            if (isShorthandPropertyAssignment(bindingTarget)) {
-                const initializer = visitor
-                    ? visitNode(bindingTarget.objectAssignmentInitializer, visitor, isExpression)
-                    : bindingTarget.objectAssignmentInitializer;
-
-                if (initializer) {
-                    value = createDefaultValueCheck(value, initializer, location);
+                    restContainingElements = append(restContainingElements, <[Identifier, BindingOrAssignmentElement]>[temp, element]);
+                    bindingElements = append(bindingElements, flattenContext.createArrayBindingOrAssignmentElement(temp));
+                }
+                else {
+                    bindingElements = append(bindingElements, element);
                 }
-
-                target = bindingTarget.name;
-            }
-            else if (isBinaryExpression(bindingTarget) && bindingTarget.operatorToken.kind === SyntaxKind.EqualsToken) {
-                const initializer = visitor
-                    ? visitNode(bindingTarget.right, visitor, isExpression)
-                    : bindingTarget.right;
-
-                value = createDefaultValueCheck(value, initializer, location);
-                target = bindingTarget.left;
-            }
-            else {
-                target = bindingTarget;
             }
-
-            if (target.kind === SyntaxKind.ObjectLiteralExpression) {
-                emitObjectLiteralAssignment(<ObjectLiteralExpression>target, value, location);
+            else if (isOmittedExpression(element)) {
+                continue;
             }
-            else if (target.kind === SyntaxKind.ArrayLiteralExpression) {
-                emitArrayLiteralAssignment(<ArrayLiteralExpression>target, value, location);
+            else if (!getRestIndicatorOfBindingOrAssignmentElement(element)) {
+                const rhsValue = createElementAccess(value, i);
+                flattenBindingOrAssignmentElement(flattenContext, element, rhsValue, /*location*/ element);
             }
-            else {
-                const name = getMutableClone(<Identifier>target);
-                setSourceMapRange(name, target);
-                setCommentRange(name, target);
-                emitAssignment(name, value, location, /*original*/ undefined);
+            else if (i === numElements - 1) {
+                const rhsValue = createArraySlice(value, i);
+                flattenBindingOrAssignmentElement(flattenContext, element, rhsValue, /*location*/ element);
             }
         }
-
-        function emitObjectLiteralAssignment(target: ObjectLiteralExpression, value: Expression, location: TextRange) {
-            const properties = target.properties;
-            if (properties.length !== 1) {
-                // For anything but a single element destructuring we need to generate a temporary
-                // to ensure value is evaluated exactly once.
-                // When doing so we want to hightlight the passed in source map node since thats the one needing this temp assignment
-                value = ensureIdentifier(value, /*reuseIdentifierExpressions*/ true, location, emitTempVariableAssignment);
-            }
-
-            for (const p of properties) {
-                if (p.kind === SyntaxKind.PropertyAssignment || p.kind === SyntaxKind.ShorthandPropertyAssignment) {
-                    const propName = <Identifier | LiteralExpression>(<PropertyAssignment>p).name;
-                    const target = p.kind === SyntaxKind.ShorthandPropertyAssignment ? <ShorthandPropertyAssignment>p : (<PropertyAssignment>p).initializer || propName;
-                    // Assignment for target = value.propName should highligh whole property, hence use p as source map node
-                    emitDestructuringAssignment(target, createDestructuringPropertyAccess(value, propName), p);
-                }
-            }
+        if (bindingElements) {
+            flattenContext.emitBindingOrAssignment(flattenContext.createArrayBindingOrAssignmentPattern(bindingElements), value, location, pattern);
         }
-
-        function emitArrayLiteralAssignment(target: ArrayLiteralExpression, value: Expression, location: TextRange) {
-            const elements = target.elements;
-            const numElements = elements.length;
-            if (numElements !== 1) {
-                // For anything but a single element destructuring we need to generate a temporary
-                // to ensure value is evaluated exactly once.
-                // When doing so we want to hightlight the passed in source map node since thats the one needing this temp assignment
-                value = ensureIdentifier(value, /*reuseIdentifierExpressions*/ true, location, emitTempVariableAssignment);
-            }
-
-            for (let i = 0; i < numElements; i++) {
-                const e = elements[i];
-                if (e.kind !== SyntaxKind.OmittedExpression) {
-                    // Assignment for target = value.propName should highligh whole property, hence use e as source map node
-                    if (e.kind !== SyntaxKind.SpreadElementExpression) {
-                        emitDestructuringAssignment(e, createElementAccess(value, createLiteral(i)), e);
-                    }
-                    else if (i === numElements - 1) {
-                        emitDestructuringAssignment((<SpreadElementExpression>e).expression, createArraySlice(value, i), e);
-                    }
-                }
+        if (restContainingElements) {
+            for (const [id, element] of restContainingElements) {
+                flattenBindingOrAssignmentElement(flattenContext, element, id, element);
             }
         }
+    }
 
-        function emitBindingElement(target: BindingElement, value: Expression) {
-            // Any temporary assignments needed to emit target = value should point to target
-            const initializer = visitor ? visitNode(target.initializer, visitor, isExpression) : target.initializer;
-            if (initializer) {
-                // Combine value and initializer
-                value = value ? createDefaultValueCheck(value, initializer, target) : initializer;
-            }
-            else if (!value) {
-                // Use 'void 0' in absence of value and initializer
-                value = createVoidZero();
-            }
+    /**
+     * Creates an expression used to provide a default value if a value is `undefined` at runtime.
+     *
+     * @param flattenContext Options used to control flattening.
+     * @param value The RHS value to test.
+     * @param defaultValue The default value to use if `value` is `undefined` at runtime.
+     * @param location The location to use for source maps and comments.
+     */
+    function createDefaultValueCheck(flattenContext: FlattenContext, value: Expression, defaultValue: Expression, location: TextRange): Expression {
+        value = ensureIdentifier(flattenContext, value, /*reuseIdentifierExpressions*/ true, location);
+        return createConditional(createTypeCheck(value, "undefined"), defaultValue, value);
+    }
 
-            const name = target.name;
-            if (isBindingPattern(name)) {
-                const elements = name.elements;
-                const numElements = elements.length;
-                if (numElements !== 1) {
-                    // For anything other than a single-element destructuring we need to generate a temporary
-                    // to ensure value is evaluated exactly once. Additionally, if we have zero elements
-                    // we need to emit *something* to ensure that in case a 'var' keyword was already emitted,
-                    // so in that case, we'll intentionally create that temporary.
-                    value = ensureIdentifier(value, /*reuseIdentifierExpressions*/ numElements !== 0, target, emitTempVariableAssignment);
-                }
-                for (let i = 0; i < numElements; i++) {
-                    const element = elements[i];
-                    if (isOmittedExpression(element)) {
-                        continue;
-                    }
-                    else if (name.kind === SyntaxKind.ObjectBindingPattern) {
-                        // Rewrite element to a declaration with an initializer that fetches property
-                        const propName = element.propertyName || <Identifier>element.name;
-                        emitBindingElement(element, createDestructuringPropertyAccess(value, propName));
-                    }
-                    else {
-                        if (!element.dotDotDotToken) {
-                            // Rewrite element to a declaration that accesses array element at index i
-                            emitBindingElement(element, createElementAccess(value, i));
-                        }
-                        else if (i === numElements - 1) {
-                            emitBindingElement(element, createArraySlice(value, i));
-                        }
-                    }
-                }
-            }
-            else {
-                emitAssignment(name, value, target, target);
-            }
+    /**
+     * Creates either a PropertyAccessExpression or an ElementAccessExpression for the
+     * right-hand side of a transformed destructuring assignment.
+     *
+     * @link https://tc39.github.io/ecma262/#sec-runtime-semantics-keyeddestructuringassignmentevaluation
+     *
+     * @param flattenContext Options used to control flattening.
+     * @param value The RHS value that is the source of the property.
+     * @param propertyName The destructuring property name.
+     */
+    function createDestructuringPropertyAccess(flattenContext: FlattenContext, value: Expression, propertyName: PropertyName): LeftHandSideExpression {
+        if (isComputedPropertyName(propertyName)) {
+            const argumentExpression = ensureIdentifier(flattenContext, propertyName.expression, /*reuseIdentifierExpressions*/ false, /*location*/ propertyName);
+            return createElementAccess(value, argumentExpression);
         }
-
-        function createDefaultValueCheck(value: Expression, defaultValue: Expression, location: TextRange): Expression {
-            value = ensureIdentifier(value, /*reuseIdentifierExpressions*/ true, location, emitTempVariableAssignment);
-            return createConditional(
-                createStrictEquality(value, createVoidZero()),
-                createToken(SyntaxKind.QuestionToken),
-                defaultValue,
-                createToken(SyntaxKind.ColonToken),
-                value
-            );
+        else if (isStringOrNumericLiteral(propertyName)) {
+            const argumentExpression = getSynthesizedClone(propertyName);
+            argumentExpression.text = unescapeIdentifier(argumentExpression.text);
+            return createElementAccess(value, argumentExpression);
         }
-
-        /**
-         * Creates either a PropertyAccessExpression or an ElementAccessExpression for the
-         * right-hand side of a transformed destructuring assignment.
-         *
-         * @param expression The right-hand expression that is the source of the property.
-         * @param propertyName The destructuring property name.
-         */
-        function createDestructuringPropertyAccess(expression: Expression, propertyName: PropertyName): LeftHandSideExpression {
-            if (isComputedPropertyName(propertyName)) {
-                return createElementAccess(
-                    expression,
-                    ensureIdentifier(propertyName.expression, /*reuseIdentifierExpressions*/ false, /*location*/ propertyName, emitTempVariableAssignment)
-                );
-            }
-            else if (isLiteralExpression(propertyName)) {
-                const clone = getSynthesizedClone(propertyName);
-                clone.text = unescapeIdentifier(clone.text);
-                return createElementAccess(expression, clone);
-            }
-            else {
-                if (isGeneratedIdentifier(propertyName)) {
-                    const clone = getSynthesizedClone(propertyName);
-                    clone.text = unescapeIdentifier(clone.text);
-                    return createPropertyAccess(expression, clone);
-                }
-                else {
-                    return createPropertyAccess(expression, createIdentifier(unescapeIdentifier(propertyName.text)));
-                }
-            }
+        else {
+            const name = createIdentifier(unescapeIdentifier(propertyName.text));
+            return createPropertyAccess(value, name);
         }
     }
 
@@ -417,29 +425,106 @@ namespace ts {
      * This function is useful to ensure that the expression's value can be read from in subsequent expressions.
      * Unless 'reuseIdentifierExpressions' is false, 'value' will be returned if it is just an identifier.
      *
+     * @param flattenContext Options used to control flattening.
      * @param value the expression whose value needs to be bound.
      * @param reuseIdentifierExpressions true if identifier expressions can simply be returned;
-     *                                   false if it is necessary to always emit an identifier.
+     * false if it is necessary to always emit an identifier.
      * @param location The location to use for source maps and comments.
-     * @param emitTempVariableAssignment A callback used to emit a temporary variable.
-     * @param visitor An optional callback used to visit the value.
      */
-    function ensureIdentifier(
-        value: Expression,
-        reuseIdentifierExpressions: boolean,
-        location: TextRange,
-        emitTempVariableAssignment: (value: Expression, location: TextRange) => Identifier,
-        visitor?: (node: Node) => VisitResult<Node>) {
-
+    function ensureIdentifier(flattenContext: FlattenContext, value: Expression, reuseIdentifierExpressions: boolean, location: TextRange) {
         if (isIdentifier(value) && reuseIdentifierExpressions) {
             return value;
         }
         else {
-            if (visitor) {
-                value = visitNode(value, visitor, isExpression);
+            const temp = createTempVariable(/*recordTempVariable*/ undefined);
+            if (flattenContext.hoistTempVariables) {
+                flattenContext.context.hoistVariableDeclaration(temp);
+                flattenContext.emitExpression(setTextRange(createAssignment(temp, value), location));
+            }
+            else {
+                flattenContext.emitBindingOrAssignment(temp, value, location, /*original*/ undefined);
             }
+            return temp;
+        }
+    }
+
+    function makeArrayBindingPattern(elements: BindingOrAssignmentElement[]) {
+        Debug.assertEachNode(elements, isArrayBindingElement);
+        return createArrayBindingPattern(<ArrayBindingElement[]>elements);
+    }
+
+    function makeArrayAssignmentPattern(elements: BindingOrAssignmentElement[]) {
+        return createArrayLiteral(map(elements, convertToArrayAssignmentElement));
+    }
+
+    function makeObjectBindingPattern(elements: BindingOrAssignmentElement[]) {
+        Debug.assertEachNode(elements, isBindingElement);
+        return createObjectBindingPattern(<BindingElement[]>elements);
+    }
 
-            return emitTempVariableAssignment(value, location);
+    function makeObjectAssignmentPattern(elements: BindingOrAssignmentElement[]) {
+        return createObjectLiteral(map(elements, convertToObjectAssignmentElement));
+    }
+
+    function makeBindingElement(name: Identifier) {
+        return createBindingElement(/*dotDotDotToken*/ undefined, /*propertyName*/ undefined, name);
+    }
+
+    function makeAssignmentElement(name: Identifier) {
+        return name;
+    }
+
+    const restHelper: EmitHelper = {
+        name: "typescript:rest",
+        scoped: false,
+        text: `
+            var __rest = (this && this.__rest) || function (s, e) {
+                var t = {};
+                for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)
+                    t[p] = s[p];
+                if (s != null && typeof Object.getOwnPropertySymbols === "function")
+                    for (var i = 0, p = Object.getOwnPropertySymbols(s); i < p.length; i++) if (e.indexOf(p[i]) < 0)
+                        t[p[i]] = s[p[i]];
+                return t;
+            };`
+    };
+
+    /** Given value: o, propName: p, pattern: { a, b, ...p } from the original statement
+     * `{ a, b, ...p } = o`, create `p = __rest(o, ["a", "b"]);`
+     */
+    function createRestCall(context: TransformationContext, value: Expression, elements: BindingOrAssignmentElement[], computedTempVariables: Expression[], location: TextRange): Expression {
+        context.requestEmitHelper(restHelper);
+        const propertyNames: Expression[] = [];
+        let computedTempVariableOffset = 0;
+        for (let i = 0; i < elements.length - 1; i++) {
+            const propertyName = getPropertyNameOfBindingOrAssignmentElement(elements[i]);
+            if (propertyName) {
+                if (isComputedPropertyName(propertyName)) {
+                    const temp = computedTempVariables[computedTempVariableOffset];
+                    computedTempVariableOffset++;
+                    // typeof _tmp === "symbol" ? _tmp : _tmp + ""
+                    propertyNames.push(
+                        createConditional(
+                            createTypeCheck(temp, "symbol"),
+                            temp,
+                            createAdd(temp, createLiteral(""))
+                        )
+                    );
+                }
+                else {
+                    propertyNames.push(createLiteral(propertyName));
+                }
+            }
         }
+        return createCall(
+            getHelperName("__rest"),
+            /*typeArguments*/ undefined,
+            [
+                value,
+                setTextRange(
+                    createArrayLiteral(propertyNames),
+                    location
+                )
+            ]);
     }
 }
diff --git a/src/compiler/transformers/es2015.ts b/src/compiler/transformers/es2015.ts
new file mode 100644
index 0000000..4146574
--- /dev/null
+++ b/src/compiler/transformers/es2015.ts
@@ -0,0 +1,4102 @@
+/// <reference path="../factory.ts" />
+/// <reference path="../visitor.ts" />
+/// <reference path="./destructuring.ts" />
+
+/*@internal*/
+namespace ts {
+    const enum ES2015SubstitutionFlags {
+        /** Enables substitutions for captured `this` */
+        CapturedThis = 1 << 0,
+        /** Enables substitutions for block-scoped bindings. */
+        BlockScopedBindings = 1 << 1,
+    }
+
+    /**
+     * If loop contains block scoped binding captured in some function then loop body is converted to a function.
+     * Lexical bindings declared in loop initializer will be passed into the loop body function as parameters,
+     * however if this binding is modified inside the body - this new value should be propagated back to the original binding.
+     * This is done by declaring new variable (out parameter holder) outside of the loop for every binding that is reassigned inside the body.
+     * On every iteration this variable is initialized with value of corresponding binding.
+     * At every point where control flow leaves the loop either explicitly (break/continue) or implicitly (at the end of loop body)
+     * we copy the value inside the loop to the out parameter holder.
+     *
+     * for (let x;;) {
+     *     let a = 1;
+     *     let b = () => a;
+     *     x++
+     *     if (...) break;
+     *     ...
+     * }
+     *
+     * will be converted to
+     *
+     * var out_x;
+     * var loop = function(x) {
+     *     var a = 1;
+     *     var b = function() { return a; }
+     *     x++;
+     *     if (...) return out_x = x, "break";
+     *     ...
+     *     out_x = x;
+     * }
+     * for (var x;;) {
+     *     out_x = x;
+     *     var state = loop(x);
+     *     x = out_x;
+     *     if (state === "break") break;
+     * }
+     *
+     * NOTE: values to out parameters are not copies if loop is abrupted with 'return' - in this case this will end the entire enclosing function
+     * so nobody can observe this new value.
+     */
+    interface LoopOutParameter {
+        originalName: Identifier;
+        outParamName: Identifier;
+    }
+
+    const enum CopyDirection {
+        ToOriginal,
+        ToOutParameter
+    }
+
+    const enum Jump {
+        Break       = 1 << 1,
+        Continue    = 1 << 2,
+        Return      = 1 << 3
+    }
+
+    interface ConvertedLoopState {
+        /*
+         * set of labels that occurred inside the converted loop
+         * used to determine if labeled jump can be emitted as is or it should be dispatched to calling code
+         */
+        labels?: Map<string>;
+        /*
+         * collection of labeled jumps that transfer control outside the converted loop.
+         * maps store association 'label -> labelMarker' where
+         * - label - value of label as it appear in code
+         * - label marker - return value that should be interpreted by calling code as 'jump to <label>'
+         */
+        labeledNonLocalBreaks?: Map<string>;
+        labeledNonLocalContinues?: Map<string>;
+
+        /*
+         * set of non-labeled jumps that transfer control outside the converted loop
+         * used to emit dispatching logic in the caller of converted loop
+         */
+        nonLocalJumps?: Jump;
+
+        /*
+         * set of non-labeled jumps that should be interpreted as local
+         * i.e. if converted loop contains normal loop or switch statement then inside this loop break should be treated as local jump
+         */
+        allowedNonLabeledJumps?: Jump;
+
+        /*
+         * alias for 'arguments' object from the calling code stack frame
+         * i.e.
+         * for (let x;;) <statement that captures x in closure and uses 'arguments'>
+         * should be converted to
+         * var loop = function(x) { <code where 'arguments' is replaced with 'arguments_1'> }
+         * var arguments_1 = arguments
+         * for (var x;;) loop(x);
+         * otherwise semantics of the code will be different since 'arguments' inside converted loop body
+         * will refer to function that holds converted loop.
+         * This value is set on demand.
+         */
+        argumentsName?: Identifier;
+
+        /*
+         * alias for 'this' from the calling code stack frame in case if this was used inside the converted loop
+         */
+        thisName?: Identifier;
+
+        /*
+         * set to true if node contains lexical 'this' so we can mark function that wraps convered loop body as 'CapturedThis' for subsequent substitution.
+         */
+        containsLexicalThis?: boolean;
+
+        /*
+         * list of non-block scoped variable declarations that appear inside converted loop
+         * such variable declarations should be moved outside the loop body
+         * for (let x;;) {
+         *     var y = 1;
+         *     ...
+         * }
+         * should be converted to
+         * var loop = function(x) {
+         *    y = 1;
+         *    ...
+         * }
+         * var y;
+         * for (var x;;) loop(x);
+         */
+        hoistedLocalVariables?: Identifier[];
+
+        /**
+         * List of loop out parameters - detailed descripion can be found in the comment to LoopOutParameter
+         */
+        loopOutParameters?: LoopOutParameter[];
+    }
+
+    const enum SuperCaptureResult {
+        /**
+         * A capture may have been added for calls to 'super', but
+         * the caller should emit subsequent statements normally.
+         */
+        NoReplacement,
+        /**
+         * A call to 'super()' got replaced with a capturing statement like:
+         *
+         *  var _this = _super.call(...) || this;
+         *
+         * Callers should skip the current statement.
+         */
+        ReplaceSuperCapture,
+        /**
+         * A call to 'super()' got replaced with a capturing statement like:
+         *
+         *  return _super.call(...) || this;
+         *
+         * Callers should skip the current statement and avoid any returns of '_this'.
+         */
+        ReplaceWithReturn,
+    }
+
+    type LoopConverter = (node: IterationStatement, outermostLabeledStatement: LabeledStatement, convertedLoopBodyStatements: Statement[]) => Statement;
+
+    // Facts we track as we traverse the tree
+    const enum HierarchyFacts {
+        None = 0,
+
+        //
+        // Ancestor facts
+        //
+
+        Function = 1 << 0,                      // Enclosed in a non-arrow function
+        ArrowFunction = 1 << 1,                 // Enclosed in an arrow function
+        AsyncFunctionBody = 1 << 2,             // Enclosed in an async function body
+        NonStaticClassElement = 1 << 3,         // Enclosed in a non-static, non-async class element
+        CapturesThis = 1 << 4,                  // Enclosed in a function that captures the lexical 'this' (used in substitution)
+        ExportedVariableStatement = 1 << 5,     // Enclosed in an exported variable statement in the current scope
+        TopLevel = 1 << 6,                      // Enclosing block-scoped container is a top-level container
+        Block = 1 << 7,                         // Enclosing block-scoped container is a Block
+        IterationStatement = 1 << 8,            // Enclosed in an IterationStatement
+        IterationStatementBlock = 1 << 9,       // Enclosing Block is enclosed in an IterationStatement
+        ForStatement = 1 << 10,                 // Enclosing block-scoped container is a ForStatement
+        ForInOrForOfStatement = 1 << 11,        // Enclosing block-scoped container is a ForInStatement or ForOfStatement
+        ConstructorWithCapturedSuper = 1 << 12, // Enclosed in a constructor that captures 'this' for use with 'super'
+        ComputedPropertyName = 1 << 13,         // Enclosed in a computed property name
+        // NOTE: do not add more ancestor flags without also updating AncestorFactsMask below.
+
+        //
+        // Ancestor masks
+        //
+
+        AncestorFactsMask = (ComputedPropertyName << 1) - 1,
+
+        // We are always in *some* kind of block scope, but only specific block-scope containers are
+        // top-level or Blocks.
+        BlockScopeIncludes = None,
+        BlockScopeExcludes = TopLevel | Block | IterationStatement | IterationStatementBlock | ForStatement | ForInOrForOfStatement,
+
+        // A source file is a top-level block scope.
+        SourceFileIncludes = TopLevel,
+        SourceFileExcludes = BlockScopeExcludes & ~TopLevel,
+
+        // Functions, methods, and accessors are both new lexical scopes and new block scopes.
+        FunctionIncludes = Function | TopLevel,
+        FunctionExcludes = BlockScopeExcludes & ~TopLevel | ArrowFunction | AsyncFunctionBody | CapturesThis | NonStaticClassElement | ConstructorWithCapturedSuper | ComputedPropertyName,
+
+        AsyncFunctionBodyIncludes = FunctionIncludes | AsyncFunctionBody,
+        AsyncFunctionBodyExcludes = FunctionExcludes & ~NonStaticClassElement,
+
+        // Arrow functions are lexically scoped to their container, but are new block scopes.
+        ArrowFunctionIncludes = ArrowFunction | TopLevel,
+        ArrowFunctionExcludes = BlockScopeExcludes & ~TopLevel | ConstructorWithCapturedSuper | ComputedPropertyName,
+
+        // Constructors are both new lexical scopes and new block scopes. Constructors are also
+        // always considered non-static members of a class.
+        ConstructorIncludes = FunctionIncludes | NonStaticClassElement,
+        ConstructorExcludes = FunctionExcludes & ~NonStaticClassElement,
+
+        // 'do' and 'while' statements are not block scopes. We track that the subtree is contained
+        // within an IterationStatement to indicate whether the embedded statement is an
+        // IterationStatementBlock.
+        DoOrWhileStatementIncludes = IterationStatement,
+        DoOrWhileStatementExcludes = None,
+
+        // 'for' statements are new block scopes and have special handling for 'let' declarations.
+        ForStatementIncludes = IterationStatement | ForStatement,
+        ForStatementExcludes = BlockScopeExcludes & ~ForStatement,
+
+        // 'for-in' and 'for-of' statements are new block scopes and have special handling for
+        // 'let' declarations.
+        ForInOrForOfStatementIncludes = IterationStatement | ForInOrForOfStatement,
+        ForInOrForOfStatementExcludes = BlockScopeExcludes & ~ForInOrForOfStatement,
+
+        // Blocks (other than function bodies) are new block scopes.
+        BlockIncludes = Block,
+        BlockExcludes = BlockScopeExcludes & ~Block,
+
+        IterationStatementBlockIncludes = IterationStatementBlock,
+        IterationStatementBlockExcludes = BlockScopeExcludes,
+
+        // Computed property names track subtree flags differently than their containing members.
+        ComputedPropertyNameIncludes = ComputedPropertyName,
+        ComputedPropertyNameExcludes = None,
+
+        //
+        // Subtree facts
+        //
+        NewTarget = 1 << 14,                        // Contains a 'new.target' meta-property
+        NewTargetInComputedPropertyName = 1 << 15,  // Contains a 'new.target' meta-property in a computed property name.
+
+
+        //
+        // Subtree masks
+        //
+
+        SubtreeFactsMask = ~AncestorFactsMask,
+        PropagateNewTargetMask = NewTarget | NewTargetInComputedPropertyName,
+    }
+
+    export function transformES2015(context: TransformationContext) {
+        const {
+            startLexicalEnvironment,
+            resumeLexicalEnvironment,
+            endLexicalEnvironment,
+            hoistVariableDeclaration,
+        } = context;
+
+        const compilerOptions = context.getCompilerOptions();
+        const resolver = context.getEmitResolver();
+        const previousOnSubstituteNode = context.onSubstituteNode;
+        const previousOnEmitNode = context.onEmitNode;
+        context.onEmitNode = onEmitNode;
+        context.onSubstituteNode = onSubstituteNode;
+
+        let currentSourceFile: SourceFile;
+        let currentText: string;
+        let hierarchyFacts: HierarchyFacts;
+
+        /**
+         * Used to track if we are emitting body of the converted loop
+         */
+        let convertedLoopState: ConvertedLoopState;
+
+        /**
+         * Keeps track of whether substitutions have been enabled for specific cases.
+         * They are persisted between each SourceFile transformation and should not
+         * be reset.
+         */
+        let enabledSubstitutions: ES2015SubstitutionFlags;
+
+        return transformSourceFile;
+
+        function transformSourceFile(node: SourceFile) {
+            if (node.isDeclarationFile) {
+                return node;
+            }
+
+            currentSourceFile = node;
+            currentText = node.text;
+
+            const visited = visitSourceFile(node);
+            addEmitHelpers(visited, context.readEmitHelpers());
+
+            currentSourceFile = undefined;
+            currentText = undefined;
+            hierarchyFacts = HierarchyFacts.None;
+            return visited;
+        }
+
+        /**
+         * Sets the `HierarchyFacts` for this node prior to visiting this node's subtree, returning the facts set prior to modification.
+         * @param excludeFacts The existing `HierarchyFacts` to reset before visiting the subtree.
+         * @param includeFacts The new `HierarchyFacts` to set before visiting the subtree.
+         */
+        function enterSubtree(excludeFacts: HierarchyFacts, includeFacts: HierarchyFacts) {
+            const ancestorFacts = hierarchyFacts;
+            hierarchyFacts = (hierarchyFacts & ~excludeFacts | includeFacts) & HierarchyFacts.AncestorFactsMask;
+            return ancestorFacts;
+        }
+
+        /**
+         * Restores the `HierarchyFacts` for this node's ancestor after visiting this node's
+         * subtree, propagating specific facts from the subtree.
+         * @param ancestorFacts The `HierarchyFacts` of the ancestor to restore after visiting the subtree.
+         * @param excludeFacts The existing `HierarchyFacts` of the subtree that should not be propagated.
+         * @param includeFacts The new `HierarchyFacts` of the subtree that should be propagated.
+         */
+        function exitSubtree(ancestorFacts: HierarchyFacts, excludeFacts: HierarchyFacts, includeFacts: HierarchyFacts) {
+            hierarchyFacts = (hierarchyFacts & ~excludeFacts | includeFacts) & HierarchyFacts.SubtreeFactsMask | ancestorFacts;
+        }
+
+        function isReturnVoidStatementInConstructorWithCapturedSuper(node: Node): boolean {
+            return hierarchyFacts & HierarchyFacts.ConstructorWithCapturedSuper
+                && node.kind === SyntaxKind.ReturnStatement
+                && !(<ReturnStatement>node).expression;
+        }
+
+        function isClassLikeVariableStatement(node: Node) {
+            if (!isVariableStatement(node)) return false;
+            const variable = singleOrUndefined((<VariableStatement>node).declarationList.declarations);
+            return variable
+                && variable.initializer
+                && isIdentifier(variable.name)
+                && (isClassLike(variable.initializer)
+                    || (isAssignmentExpression(variable.initializer)
+                        && isIdentifier(variable.initializer.left)
+                        && isClassLike(variable.initializer.right)));
+        }
+
+        function isTypeScriptClassWrapper(node: Node) {
+            const call = tryCast(node, isCallExpression);
+            if (!call || isParseTreeNode(call) ||
+                some(call.typeArguments) ||
+                some(call.arguments)) {
+                return false;
+            }
+
+            const func = tryCast(skipOuterExpressions(call.expression), isFunctionExpression);
+            if (!func || isParseTreeNode(func) ||
+                some(func.typeParameters) ||
+                some(func.parameters) ||
+                func.type ||
+                !func.body) {
+                return false;
+            }
+
+            const statements = func.body.statements;
+            if (statements.length < 2) {
+                return false;
+            }
+
+            const firstStatement = statements[0];
+            if (isParseTreeNode(firstStatement) ||
+                !isClassLike(firstStatement) &&
+                !isClassLikeVariableStatement(firstStatement)) {
+                return false;
+            }
+
+            const lastStatement = elementAt(statements, -1);
+            const returnStatement = tryCast(isVariableStatement(lastStatement) ? elementAt(statements, -2) : lastStatement, isReturnStatement);
+            if (!returnStatement ||
+                !returnStatement.expression ||
+                !isIdentifier(skipOuterExpressions(returnStatement.expression))) {
+                return false;
+            }
+
+            return true;
+        }
+
+        function shouldVisitNode(node: Node): boolean {
+            return (node.transformFlags & TransformFlags.ContainsES2015) !== 0
+                || convertedLoopState !== undefined
+                || (hierarchyFacts & HierarchyFacts.ConstructorWithCapturedSuper && isStatement(node))
+                || (isIterationStatement(node, /*lookInLabeledStatements*/ false) && shouldConvertIterationStatementBody(node))
+                || isTypeScriptClassWrapper(node);
+        }
+
+        function visitor(node: Node): VisitResult<Node> {
+            if (shouldVisitNode(node)) {
+                return visitJavaScript(node);
+            }
+            else {
+                return node;
+            }
+        }
+
+        function functionBodyVisitor(node: Block): Block {
+            if (shouldVisitNode(node)) {
+                return visitBlock(node, /*isFunctionBody*/ true);
+            }
+            return node;
+        }
+
+        function callExpressionVisitor(node: Node): VisitResult<Node> {
+            if (node.kind === SyntaxKind.SuperKeyword) {
+                return visitSuperKeyword(/*isExpressionOfCall*/ true);
+            }
+            return visitor(node);
+        }
+
+        function visitJavaScript(node: Node): VisitResult<Node> {
+            switch (node.kind) {
+                case SyntaxKind.StaticKeyword:
+                    return undefined; // elide static keyword
+
+                case SyntaxKind.ClassDeclaration:
+                    return visitClassDeclaration(<ClassDeclaration>node);
+
+                case SyntaxKind.ClassExpression:
+                    return visitClassExpression(<ClassExpression>node);
+
+                case SyntaxKind.Parameter:
+                    return visitParameter(<ParameterDeclaration>node);
+
+                case SyntaxKind.FunctionDeclaration:
+                    return visitFunctionDeclaration(<FunctionDeclaration>node);
+
+                case SyntaxKind.ArrowFunction:
+                    return visitArrowFunction(<ArrowFunction>node);
+
+                case SyntaxKind.FunctionExpression:
+                    return visitFunctionExpression(<FunctionExpression>node);
+
+                case SyntaxKind.VariableDeclaration:
+                    return visitVariableDeclaration(<VariableDeclaration>node);
+
+                case SyntaxKind.Identifier:
+                    return visitIdentifier(<Identifier>node);
+
+                case SyntaxKind.VariableDeclarationList:
+                    return visitVariableDeclarationList(<VariableDeclarationList>node);
+
+                case SyntaxKind.SwitchStatement:
+                    return visitSwitchStatement(<SwitchStatement>node);
+
+                case SyntaxKind.CaseBlock:
+                    return visitCaseBlock(<CaseBlock>node);
+
+                case SyntaxKind.Block:
+                    return visitBlock(<Block>node, /*isFunctionBody*/ false);
+
+                case SyntaxKind.BreakStatement:
+                case SyntaxKind.ContinueStatement:
+                    return visitBreakOrContinueStatement(<BreakOrContinueStatement>node);
+
+                case SyntaxKind.LabeledStatement:
+                    return visitLabeledStatement(<LabeledStatement>node);
+
+                case SyntaxKind.DoStatement:
+                case SyntaxKind.WhileStatement:
+                    return visitDoOrWhileStatement(<DoStatement | WhileStatement>node, /*outermostLabeledStatement*/ undefined);
+
+                case SyntaxKind.ForStatement:
+                    return visitForStatement(<ForStatement>node, /*outermostLabeledStatement*/ undefined);
+
+                case SyntaxKind.ForInStatement:
+                    return visitForInStatement(<ForInStatement>node, /*outermostLabeledStatement*/ undefined);
+
+                case SyntaxKind.ForOfStatement:
+                    return visitForOfStatement(<ForOfStatement>node, /*outermostLabeledStatement*/ undefined);
+
+                case SyntaxKind.ExpressionStatement:
+                    return visitExpressionStatement(<ExpressionStatement>node);
+
+                case SyntaxKind.ObjectLiteralExpression:
+                    return visitObjectLiteralExpression(<ObjectLiteralExpression>node);
+
+                case SyntaxKind.CatchClause:
+                    return visitCatchClause(<CatchClause>node);
+
+                case SyntaxKind.ShorthandPropertyAssignment:
+                    return visitShorthandPropertyAssignment(<ShorthandPropertyAssignment>node);
+
+                case SyntaxKind.ComputedPropertyName:
+                    return visitComputedPropertyName(<ComputedPropertyName>node);
+
+                case SyntaxKind.ArrayLiteralExpression:
+                    return visitArrayLiteralExpression(<ArrayLiteralExpression>node);
+
+                case SyntaxKind.CallExpression:
+                    return visitCallExpression(<CallExpression>node);
+
+                case SyntaxKind.NewExpression:
+                    return visitNewExpression(<NewExpression>node);
+
+                case SyntaxKind.ParenthesizedExpression:
+                    return visitParenthesizedExpression(<ParenthesizedExpression>node, /*needsDestructuringValue*/ true);
+
+                case SyntaxKind.BinaryExpression:
+                    return visitBinaryExpression(<BinaryExpression>node, /*needsDestructuringValue*/ true);
+
+                case SyntaxKind.NoSubstitutionTemplateLiteral:
+                case SyntaxKind.TemplateHead:
+                case SyntaxKind.TemplateMiddle:
+                case SyntaxKind.TemplateTail:
+                    return visitTemplateLiteral(<LiteralExpression>node);
+
+                case SyntaxKind.StringLiteral:
+                    return visitStringLiteral(<StringLiteral>node);
+
+                case SyntaxKind.NumericLiteral:
+                    return visitNumericLiteral(<NumericLiteral>node);
+
+                case SyntaxKind.TaggedTemplateExpression:
+                    return visitTaggedTemplateExpression(<TaggedTemplateExpression>node);
+
+                case SyntaxKind.TemplateExpression:
+                    return visitTemplateExpression(<TemplateExpression>node);
+
+                case SyntaxKind.YieldExpression:
+                    return visitYieldExpression(<YieldExpression>node);
+
+                case SyntaxKind.SpreadElement:
+                    return visitSpreadElement(<SpreadElement>node);
+
+                case SyntaxKind.SuperKeyword:
+                    return visitSuperKeyword(/*isExpressionOfCall*/ false);
+
+                case SyntaxKind.ThisKeyword:
+                    return visitThisKeyword(node);
+
+                case SyntaxKind.MetaProperty:
+                    return visitMetaProperty(<MetaProperty>node);
+
+                case SyntaxKind.MethodDeclaration:
+                    return visitMethodDeclaration(<MethodDeclaration>node);
+
+                case SyntaxKind.GetAccessor:
+                case SyntaxKind.SetAccessor:
+                    return visitAccessorDeclaration(<AccessorDeclaration>node);
+
+                case SyntaxKind.VariableStatement:
+                    return visitVariableStatement(<VariableStatement>node);
+
+                case SyntaxKind.ReturnStatement:
+                    return visitReturnStatement(<ReturnStatement>node);
+
+                default:
+                    return visitEachChild(node, visitor, context);
+            }
+        }
+
+        function visitSourceFile(node: SourceFile): SourceFile {
+            const ancestorFacts = enterSubtree(HierarchyFacts.SourceFileExcludes, HierarchyFacts.SourceFileIncludes);
+            const statements: Statement[] = [];
+            startLexicalEnvironment();
+            let statementOffset = addStandardPrologue(statements, node.statements, /*ensureUseStrict*/ false);
+            addCaptureThisForNodeIfNeeded(statements, node);
+            statementOffset = addCustomPrologue(statements, node.statements, statementOffset, visitor);
+            addRange(statements, visitNodes(node.statements, visitor, isStatement, statementOffset));
+            addRange(statements, endLexicalEnvironment());
+            exitSubtree(ancestorFacts, HierarchyFacts.None, HierarchyFacts.None);
+            return updateSourceFileNode(
+                node,
+                setTextRange(createNodeArray(statements), node.statements)
+            );
+        }
+
+        function visitSwitchStatement(node: SwitchStatement): SwitchStatement {
+            if (convertedLoopState !== undefined) {
+                const savedAllowedNonLabeledJumps = convertedLoopState.allowedNonLabeledJumps;
+                // for switch statement allow only non-labeled break
+                convertedLoopState.allowedNonLabeledJumps |= Jump.Break;
+                const result = visitEachChild(node, visitor, context);
+                convertedLoopState.allowedNonLabeledJumps = savedAllowedNonLabeledJumps;
+                return result;
+            }
+            return visitEachChild(node, visitor, context);
+        }
+
+        function visitCaseBlock(node: CaseBlock): CaseBlock {
+            const ancestorFacts = enterSubtree(HierarchyFacts.BlockScopeExcludes, HierarchyFacts.BlockScopeIncludes);
+            const updated = visitEachChild(node, visitor, context);
+            exitSubtree(ancestorFacts, HierarchyFacts.None, HierarchyFacts.None);
+            return updated;
+        }
+
+        function returnCapturedThis(node: Node): ReturnStatement {
+            return setOriginalNode(createReturn(createIdentifier("_this")), node);
+        }
+
+        function visitReturnStatement(node: ReturnStatement): Statement {
+            if (convertedLoopState) {
+                convertedLoopState.nonLocalJumps |= Jump.Return;
+                if (isReturnVoidStatementInConstructorWithCapturedSuper(node)) {
+                    node = returnCapturedThis(node);
+                }
+                return createReturn(
+                    createObjectLiteral(
+                        [
+                            createPropertyAssignment(
+                                createIdentifier("value"),
+                                node.expression
+                                    ? visitNode(node.expression, visitor, isExpression)
+                                    : createVoidZero()
+                            )
+                        ]
+                    )
+                );
+            }
+            else if (isReturnVoidStatementInConstructorWithCapturedSuper(node)) {
+                return returnCapturedThis(node);
+            }
+            return visitEachChild(node, visitor, context);
+        }
+
+        function visitThisKeyword(node: Node): Node {
+            if (convertedLoopState) {
+                if (hierarchyFacts & HierarchyFacts.ArrowFunction) {
+                    // if the enclosing function is an ArrowFunction then we use the captured 'this' keyword.
+                    convertedLoopState.containsLexicalThis = true;
+                    return node;
+                }
+                return convertedLoopState.thisName || (convertedLoopState.thisName = createUniqueName("this"));
+            }
+            return node;
+        }
+
+        function visitIdentifier(node: Identifier): Identifier {
+            if (!convertedLoopState) {
+                return node;
+            }
+            if (isGeneratedIdentifier(node)) {
+                return node;
+            }
+            if (node.text !== "arguments" || !resolver.isArgumentsLocalBinding(node)) {
+                return node;
+            }
+            return convertedLoopState.argumentsName || (convertedLoopState.argumentsName = createUniqueName("arguments"));
+        }
+
+        function visitBreakOrContinueStatement(node: BreakOrContinueStatement): Statement {
+            if (convertedLoopState) {
+                // check if we can emit break/continue as is
+                // it is possible if either
+                //   - break/continue is labeled and label is located inside the converted loop
+                //   - break/continue is non-labeled and located in non-converted loop/switch statement
+                const jump = node.kind === SyntaxKind.BreakStatement ? Jump.Break : Jump.Continue;
+                const canUseBreakOrContinue =
+                    (node.label && convertedLoopState.labels && convertedLoopState.labels.get(node.label.text)) ||
+                    (!node.label && (convertedLoopState.allowedNonLabeledJumps & jump));
+
+                if (!canUseBreakOrContinue) {
+                    let labelMarker: string;
+                    if (!node.label) {
+                        if (node.kind === SyntaxKind.BreakStatement) {
+                            convertedLoopState.nonLocalJumps |= Jump.Break;
+                            labelMarker = "break";
+                        }
+                        else {
+                            convertedLoopState.nonLocalJumps |= Jump.Continue;
+                            // note: return value is emitted only to simplify debugging, call to converted loop body does not do any dispatching on it.
+                            labelMarker = "continue";
+                        }
+                    }
+                    else {
+                        if (node.kind === SyntaxKind.BreakStatement) {
+                            labelMarker = `break-${node.label.text}`;
+                            setLabeledJump(convertedLoopState, /*isBreak*/ true, node.label.text, labelMarker);
+                        }
+                        else {
+                            labelMarker = `continue-${node.label.text}`;
+                            setLabeledJump(convertedLoopState, /*isBreak*/ false, node.label.text, labelMarker);
+                        }
+                    }
+                    let returnExpression: Expression = createLiteral(labelMarker);
+                    if (convertedLoopState.loopOutParameters.length) {
+                        const outParams = convertedLoopState.loopOutParameters;
+                        let expr: Expression;
+                        for (let i = 0; i < outParams.length; i++) {
+                            const copyExpr = copyOutParameter(outParams[i], CopyDirection.ToOutParameter);
+                            if (i === 0) {
+                                expr = copyExpr;
+                            }
+                            else {
+                                expr = createBinary(expr, SyntaxKind.CommaToken, copyExpr);
+                            }
+                        }
+                        returnExpression = createBinary(expr, SyntaxKind.CommaToken, returnExpression);
+                    }
+                    return createReturn(returnExpression);
+                }
+            }
+            return visitEachChild(node, visitor, context);
+        }
+
+        /**
+         * Visits a ClassDeclaration and transforms it into a variable statement.
+         *
+         * @param node A ClassDeclaration node.
+         */
+        function visitClassDeclaration(node: ClassDeclaration): VisitResult<Statement> {
+            // [source]
+            //      class C { }
+            //
+            // [output]
+            //      var C = (function () {
+            //          function C() {
+            //          }
+            //          return C;
+            //      }());
+
+            const variable = createVariableDeclaration(
+                getLocalName(node, /*allowComments*/ true),
+                /*type*/ undefined,
+                transformClassLikeDeclarationToExpression(node)
+            );
+
+            setOriginalNode(variable, node);
+
+            const statements: Statement[] = [];
+            const statement = createVariableStatement(/*modifiers*/ undefined, createVariableDeclarationList([variable]));
+
+            setOriginalNode(statement, node);
+            setTextRange(statement, node);
+            startOnNewLine(statement);
+            statements.push(statement);
+
+            // Add an `export default` statement for default exports (for `--target es5 --module es6`)
+            if (hasModifier(node, ModifierFlags.Export)) {
+                const exportStatement = hasModifier(node, ModifierFlags.Default)
+                    ? createExportDefault(getLocalName(node))
+                    : createExternalModuleExport(getLocalName(node));
+
+                setOriginalNode(exportStatement, statement);
+                statements.push(exportStatement);
+            }
+
+            const emitFlags = getEmitFlags(node);
+            if ((emitFlags & EmitFlags.HasEndOfDeclarationMarker) === 0) {
+                // Add a DeclarationMarker as a marker for the end of the declaration
+                statements.push(createEndOfDeclarationMarker(node));
+                setEmitFlags(statement, emitFlags | EmitFlags.HasEndOfDeclarationMarker);
+            }
+
+            return singleOrMany(statements);
+        }
+
+        /**
+         * Visits a ClassExpression and transforms it into an expression.
+         *
+         * @param node A ClassExpression node.
+         */
+        function visitClassExpression(node: ClassExpression): Expression {
+            // [source]
+            //      C = class { }
+            //
+            // [output]
+            //      C = (function () {
+            //          function class_1() {
+            //          }
+            //          return class_1;
+            //      }())
+
+            return transformClassLikeDeclarationToExpression(node);
+        }
+
+        /**
+         * Transforms a ClassExpression or ClassDeclaration into an expression.
+         *
+         * @param node A ClassExpression or ClassDeclaration node.
+         */
+        function transformClassLikeDeclarationToExpression(node: ClassExpression | ClassDeclaration): Expression {
+            // [source]
+            //      class C extends D {
+            //          constructor() {}
+            //          method() {}
+            //          get prop() {}
+            //          set prop(v) {}
+            //      }
+            //
+            // [output]
+            //      (function (_super) {
+            //          __extends(C, _super);
+            //          function C() {
+            //          }
+            //          C.prototype.method = function () {}
+            //          Object.defineProperty(C.prototype, "prop", {
+            //              get: function() {},
+            //              set: function() {},
+            //              enumerable: true,
+            //              configurable: true
+            //          });
+            //          return C;
+            //      }(D))
+
+            if (node.name) {
+                enableSubstitutionsForBlockScopedBindings();
+            }
+
+            const extendsClauseElement = getClassExtendsHeritageClauseElement(node);
+            const classFunction = createFunctionExpression(
+                /*modifiers*/ undefined,
+                /*asteriskToken*/ undefined,
+                /*name*/ undefined,
+                /*typeParameters*/ undefined,
+                extendsClauseElement ? [createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, "_super")] : [],
+                /*type*/ undefined,
+                transformClassBody(node, extendsClauseElement)
+            );
+
+            // To preserve the behavior of the old emitter, we explicitly indent
+            // the body of the function here if it was requested in an earlier
+            // transformation.
+            if (getEmitFlags(node) & EmitFlags.Indented) {
+                setEmitFlags(classFunction, EmitFlags.Indented);
+            }
+
+            // "inner" and "outer" below are added purely to preserve source map locations from
+            // the old emitter
+            const inner = createPartiallyEmittedExpression(classFunction);
+            inner.end = node.end;
+            setEmitFlags(inner, EmitFlags.NoComments);
+
+            const outer = createPartiallyEmittedExpression(inner);
+            outer.end = skipTrivia(currentText, node.pos);
+            setEmitFlags(outer, EmitFlags.NoComments);
+
+            return createParen(
+                createCall(
+                    outer,
+                    /*typeArguments*/ undefined,
+                    extendsClauseElement
+                        ? [visitNode(extendsClauseElement.expression, visitor, isExpression)]
+                        : []
+                )
+            );
+        }
+
+        /**
+         * Transforms a ClassExpression or ClassDeclaration into a function body.
+         *
+         * @param node A ClassExpression or ClassDeclaration node.
+         * @param extendsClauseElement The expression for the class `extends` clause.
+         */
+        function transformClassBody(node: ClassExpression | ClassDeclaration, extendsClauseElement: ExpressionWithTypeArguments): Block {
+            const statements: Statement[] = [];
+            startLexicalEnvironment();
+            addExtendsHelperIfNeeded(statements, node, extendsClauseElement);
+            addConstructor(statements, node, extendsClauseElement);
+            addClassMembers(statements, node);
+
+            // Create a synthetic text range for the return statement.
+            const closingBraceLocation = createTokenRange(skipTrivia(currentText, node.members.end), SyntaxKind.CloseBraceToken);
+            const localName = getInternalName(node);
+
+            // The following partially-emitted expression exists purely to align our sourcemap
+            // emit with the original emitter.
+            const outer = createPartiallyEmittedExpression(localName);
+            outer.end = closingBraceLocation.end;
+            setEmitFlags(outer, EmitFlags.NoComments);
+
+            const statement = createReturn(outer);
+            statement.pos = closingBraceLocation.pos;
+            setEmitFlags(statement, EmitFlags.NoComments | EmitFlags.NoTokenSourceMaps);
+            statements.push(statement);
+
+            addRange(statements, endLexicalEnvironment());
+
+            const block = createBlock(setTextRange(createNodeArray(statements), /*location*/ node.members), /*multiLine*/ true);
+            setEmitFlags(block, EmitFlags.NoComments);
+            return block;
+        }
+
+        /**
+         * Adds a call to the `__extends` helper if needed for a class.
+         *
+         * @param statements The statements of the class body function.
+         * @param node The ClassExpression or ClassDeclaration node.
+         * @param extendsClauseElement The expression for the class `extends` clause.
+         */
+        function addExtendsHelperIfNeeded(statements: Statement[], node: ClassExpression | ClassDeclaration, extendsClauseElement: ExpressionWithTypeArguments): void {
+            if (extendsClauseElement) {
+                statements.push(
+                    setTextRange(
+                        createStatement(
+                            createExtendsHelper(context, getLocalName(node))
+                        ),
+                        /*location*/ extendsClauseElement
+                    )
+                );
+            }
+        }
+
+        /**
+         * Adds the constructor of the class to a class body function.
+         *
+         * @param statements The statements of the class body function.
+         * @param node The ClassExpression or ClassDeclaration node.
+         * @param extendsClauseElement The expression for the class `extends` clause.
+         */
+        function addConstructor(statements: Statement[], node: ClassExpression | ClassDeclaration, extendsClauseElement: ExpressionWithTypeArguments): void {
+            const savedConvertedLoopState = convertedLoopState;
+            convertedLoopState = undefined;
+            const ancestorFacts = enterSubtree(HierarchyFacts.ConstructorExcludes, HierarchyFacts.ConstructorIncludes);
+            const constructor = getFirstConstructorWithBody(node);
+            const hasSynthesizedSuper = hasSynthesizedDefaultSuperCall(constructor, extendsClauseElement !== undefined);
+            const constructorFunction = createFunctionDeclaration(
+                /*decorators*/ undefined,
+                /*modifiers*/ undefined,
+                /*asteriskToken*/ undefined,
+                getInternalName(node),
+                /*typeParameters*/ undefined,
+                transformConstructorParameters(constructor, hasSynthesizedSuper),
+                /*type*/ undefined,
+                transformConstructorBody(constructor, node, extendsClauseElement, hasSynthesizedSuper)
+            );
+
+            setTextRange(constructorFunction, constructor || node);
+            if (extendsClauseElement) {
+                setEmitFlags(constructorFunction, EmitFlags.CapturesThis);
+            }
+
+            statements.push(constructorFunction);
+            exitSubtree(ancestorFacts, HierarchyFacts.PropagateNewTargetMask, HierarchyFacts.None);
+            convertedLoopState = savedConvertedLoopState;
+        }
+
+        /**
+         * Transforms the parameters of the constructor declaration of a class.
+         *
+         * @param constructor The constructor for the class.
+         * @param hasSynthesizedSuper A value indicating whether the constructor starts with a
+         *                            synthesized `super` call.
+         */
+        function transformConstructorParameters(constructor: ConstructorDeclaration, hasSynthesizedSuper: boolean) {
+            // If the TypeScript transformer needed to synthesize a constructor for property
+            // initializers, it would have also added a synthetic `...args` parameter and
+            // `super` call.
+            // If this is the case, we do not include the synthetic `...args` parameter and
+            // will instead use the `arguments` object in ES5/3.
+            return visitParameterList(constructor && !hasSynthesizedSuper && constructor.parameters, visitor, context)
+                || <ParameterDeclaration[]>[];
+        }
+
+        /**
+         * Transforms the body of a constructor declaration of a class.
+         *
+         * @param constructor The constructor for the class.
+         * @param node The node which contains the constructor.
+         * @param extendsClauseElement The expression for the class `extends` clause.
+         * @param hasSynthesizedSuper A value indicating whether the constructor starts with a
+         *                            synthesized `super` call.
+         */
+        function transformConstructorBody(constructor: ConstructorDeclaration | undefined, node: ClassDeclaration | ClassExpression, extendsClauseElement: ExpressionWithTypeArguments, hasSynthesizedSuper: boolean) {
+            const statements: Statement[] = [];
+            resumeLexicalEnvironment();
+
+            let statementOffset = -1;
+            if (hasSynthesizedSuper) {
+                // If a super call has already been synthesized,
+                // we're going to assume that we should just transform everything after that.
+                // The assumption is that no prior step in the pipeline has added any prologue directives.
+                statementOffset = 0;
+            }
+            else if (constructor) {
+                statementOffset = addStandardPrologue(statements, constructor.body.statements, /*ensureUseStrict*/ false);
+            }
+
+            if (constructor) {
+                addDefaultValueAssignmentsIfNeeded(statements, constructor);
+                addRestParameterIfNeeded(statements, constructor, hasSynthesizedSuper);
+                if (!hasSynthesizedSuper) {
+                    // If no super call has been synthesized, emit custom prologue directives.
+                    statementOffset = addCustomPrologue(statements, constructor.body.statements, statementOffset, visitor);
+                }
+                Debug.assert(statementOffset >= 0, "statementOffset not initialized correctly!");
+
+            }
+
+            // determine whether the class is known syntactically to be a derived class (e.g. a
+            // class that extends a value that is not syntactically known to be `null`).
+            const isDerivedClass = extendsClauseElement && skipOuterExpressions(extendsClauseElement.expression).kind !== SyntaxKind.NullKeyword;
+            const superCaptureStatus = declareOrCaptureOrReturnThisForConstructorIfNeeded(statements, constructor, isDerivedClass, hasSynthesizedSuper, statementOffset);
+
+            // The last statement expression was replaced. Skip it.
+            if (superCaptureStatus === SuperCaptureResult.ReplaceSuperCapture || superCaptureStatus === SuperCaptureResult.ReplaceWithReturn) {
+                statementOffset++;
+            }
+
+            if (constructor) {
+                if (superCaptureStatus === SuperCaptureResult.ReplaceSuperCapture) {
+                    hierarchyFacts |= HierarchyFacts.ConstructorWithCapturedSuper;
+                }
+
+                addRange(statements, visitNodes(constructor.body.statements, visitor, isStatement, /*start*/ statementOffset));
+            }
+
+            // Return `_this` unless we're sure enough that it would be pointless to add a return statement.
+            // If there's a constructor that we can tell returns in enough places, then we *do not* want to add a return.
+            if (isDerivedClass
+                && superCaptureStatus !== SuperCaptureResult.ReplaceWithReturn
+                && !(constructor && isSufficientlyCoveredByReturnStatements(constructor.body))) {
+                statements.push(
+                    createReturn(
+                        createIdentifier("_this")
+                    )
+                );
+            }
+
+            addRange(statements, endLexicalEnvironment());
+
+            if (constructor) {
+                prependCaptureNewTargetIfNeeded(statements, constructor, /*copyOnWrite*/ false);
+            }
+
+            const block = createBlock(
+                setTextRange(
+                    createNodeArray(
+                        statements
+                    ),
+                    /*location*/ constructor ? constructor.body.statements : node.members
+                ),
+                /*multiLine*/ true
+            );
+
+            setTextRange(block, constructor ? constructor.body : node);
+            if (!constructor) {
+                setEmitFlags(block, EmitFlags.NoComments);
+            }
+
+            return block;
+        }
+
+        /**
+         * We want to try to avoid emitting a return statement in certain cases if a user already returned something.
+         * It would generate obviously dead code, so we'll try to make things a little bit prettier
+         * by doing a minimal check on whether some common patterns always explicitly return.
+         */
+        function isSufficientlyCoveredByReturnStatements(statement: Statement): boolean {
+            // A return statement is considered covered.
+            if (statement.kind === SyntaxKind.ReturnStatement) {
+                return true;
+            }
+            // An if-statement with two covered branches is covered.
+            else if (statement.kind === SyntaxKind.IfStatement) {
+                const ifStatement = statement as IfStatement;
+                if (ifStatement.elseStatement) {
+                    return isSufficientlyCoveredByReturnStatements(ifStatement.thenStatement) &&
+                        isSufficientlyCoveredByReturnStatements(ifStatement.elseStatement);
+                }
+            }
+            // A block is covered if it has a last statement which is covered.
+            else if (statement.kind === SyntaxKind.Block) {
+                const lastStatement = lastOrUndefined((statement as Block).statements);
+                if (lastStatement && isSufficientlyCoveredByReturnStatements(lastStatement)) {
+                    return true;
+                }
+            }
+
+            return false;
+        }
+
+        /**
+         * Declares a `_this` variable for derived classes and for when arrow functions capture `this`.
+         *
+         * @returns The new statement offset into the `statements` array.
+         */
+        function declareOrCaptureOrReturnThisForConstructorIfNeeded(
+                    statements: Statement[],
+                    ctor: ConstructorDeclaration | undefined,
+                    isDerivedClass: boolean,
+                    hasSynthesizedSuper: boolean,
+                    statementOffset: number) {
+            // If this isn't a derived class, just capture 'this' for arrow functions if necessary.
+            if (!isDerivedClass) {
+                if (ctor) {
+                    addCaptureThisForNodeIfNeeded(statements, ctor);
+                }
+                return SuperCaptureResult.NoReplacement;
+            }
+
+            // We must be here because the user didn't write a constructor
+            // but we needed to call 'super(...args)' anyway as per 14.5.14 of the ES2016 spec.
+            // If that's the case we can just immediately return the result of a 'super()' call.
+            if (!ctor) {
+                statements.push(createReturn(createDefaultSuperCallOrThis()));
+                return SuperCaptureResult.ReplaceWithReturn;
+            }
+
+            // The constructor exists, but it and the 'super()' call it contains were generated
+            // for something like property initializers.
+            // Create a captured '_this' variable and assume it will subsequently be used.
+            if (hasSynthesizedSuper) {
+                captureThisForNode(statements, ctor, createDefaultSuperCallOrThis());
+                enableSubstitutionsForCapturedThis();
+                return SuperCaptureResult.ReplaceSuperCapture;
+            }
+
+            // Most of the time, a 'super' call will be the first real statement in a constructor body.
+            // In these cases, we'd like to transform these into a *single* statement instead of a declaration
+            // followed by an assignment statement for '_this'. For instance, if we emitted without an initializer,
+            // we'd get:
+            //
+            //      var _this;
+            //      _this = _super.call(...) || this;
+            //
+            // instead of
+            //
+            //      var _this = _super.call(...) || this;
+            //
+            // Additionally, if the 'super()' call is the last statement, we should just avoid capturing
+            // entirely and immediately return the result like so:
+            //
+            //      return _super.call(...) || this;
+            //
+            let firstStatement: Statement;
+            let superCallExpression: Expression;
+
+            const ctorStatements = ctor.body.statements;
+            if (statementOffset < ctorStatements.length) {
+                firstStatement = ctorStatements[statementOffset];
+
+                if (firstStatement.kind === SyntaxKind.ExpressionStatement && isSuperCall((firstStatement as ExpressionStatement).expression)) {
+                    superCallExpression = visitImmediateSuperCallInBody((firstStatement as ExpressionStatement).expression as CallExpression);
+                }
+            }
+
+            // Return the result if we have an immediate super() call on the last statement,
+            // but only if the constructor itself doesn't use 'this' elsewhere.
+            if (superCallExpression
+                && statementOffset === ctorStatements.length - 1
+                && !(ctor.transformFlags & (TransformFlags.ContainsLexicalThis | TransformFlags.ContainsCapturedLexicalThis))) {
+                const returnStatement = createReturn(superCallExpression);
+
+                if (superCallExpression.kind !== SyntaxKind.BinaryExpression
+                    || (superCallExpression as BinaryExpression).left.kind !== SyntaxKind.CallExpression) {
+                    Debug.fail("Assumed generated super call would have form 'super.call(...) || this'.");
+                }
+
+                // Shift comments from the original super call to the return statement.
+                setCommentRange(returnStatement, getCommentRange(
+                    setEmitFlags(
+                        (superCallExpression as BinaryExpression).left,
+                        EmitFlags.NoComments)));
+
+                statements.push(returnStatement);
+                return SuperCaptureResult.ReplaceWithReturn;
+            }
+
+            // Perform the capture.
+            captureThisForNode(statements, ctor, superCallExpression || createActualThis(), firstStatement);
+
+            // If we're actually replacing the original statement, we need to signal this to the caller.
+            if (superCallExpression) {
+                return SuperCaptureResult.ReplaceSuperCapture;
+            }
+
+            return SuperCaptureResult.NoReplacement;
+        }
+
+        function createActualThis() {
+            return setEmitFlags(createThis(), EmitFlags.NoSubstitution);
+        }
+
+        function createDefaultSuperCallOrThis() {
+            return createLogicalOr(
+                createLogicalAnd(
+                    createStrictInequality(
+                        createIdentifier("_super"),
+                        createNull()
+                    ),
+                    createFunctionApply(
+                        createIdentifier("_super"),
+                        createActualThis(),
+                        createIdentifier("arguments"),
+                    )
+                ),
+                createActualThis()
+            );
+        }
+
+        /**
+         * Visits a parameter declaration.
+         *
+         * @param node A ParameterDeclaration node.
+         */
+        function visitParameter(node: ParameterDeclaration): ParameterDeclaration {
+            if (node.dotDotDotToken) {
+                // rest parameters are elided
+                return undefined;
+            }
+            else if (isBindingPattern(node.name)) {
+                // Binding patterns are converted into a generated name and are
+                // evaluated inside the function body.
+                return setOriginalNode(
+                    setTextRange(
+                        createParameter(
+                            /*decorators*/ undefined,
+                            /*modifiers*/ undefined,
+                            /*dotDotDotToken*/ undefined,
+                            getGeneratedNameForNode(node),
+                            /*questionToken*/ undefined,
+                            /*type*/ undefined,
+                            /*initializer*/ undefined
+                        ),
+                        /*location*/ node
+                    ),
+                    /*original*/ node
+                );
+            }
+            else if (node.initializer) {
+                // Initializers are elided
+                return setOriginalNode(
+                    setTextRange(
+                        createParameter(
+                            /*decorators*/ undefined,
+                            /*modifiers*/ undefined,
+                            /*dotDotDotToken*/ undefined,
+                            node.name,
+                            /*questionToken*/ undefined,
+                            /*type*/ undefined,
+                            /*initializer*/ undefined
+                        ),
+                        /*location*/ node
+                    ),
+                    /*original*/ node
+                );
+            }
+            else {
+                return node;
+            }
+        }
+
+        /**
+         * Gets a value indicating whether we need to add default value assignments for a
+         * function-like node.
+         *
+         * @param node A function-like node.
+         */
+        function shouldAddDefaultValueAssignments(node: FunctionLikeDeclaration): boolean {
+            return (node.transformFlags & TransformFlags.ContainsDefaultValueAssignments) !== 0;
+        }
+
+        /**
+         * Adds statements to the body of a function-like node if it contains parameters with
+         * binding patterns or initializers.
+         *
+         * @param statements The statements for the new function body.
+         * @param node A function-like node.
+         */
+        function addDefaultValueAssignmentsIfNeeded(statements: Statement[], node: FunctionLikeDeclaration): void {
+            if (!shouldAddDefaultValueAssignments(node)) {
+                return;
+            }
+
+            for (const parameter of node.parameters) {
+                const { name, initializer, dotDotDotToken } = parameter;
+
+                // A rest parameter cannot have a binding pattern or an initializer,
+                // so let's just ignore it.
+                if (dotDotDotToken) {
+                    continue;
+                }
+
+                if (isBindingPattern(name)) {
+                    addDefaultValueAssignmentForBindingPattern(statements, parameter, name, initializer);
+                }
+                else if (initializer) {
+                    addDefaultValueAssignmentForInitializer(statements, parameter, name, initializer);
+                }
+            }
+        }
+
+        /**
+         * Adds statements to the body of a function-like node for parameters with binding patterns
+         *
+         * @param statements The statements for the new function body.
+         * @param parameter The parameter for the function.
+         * @param name The name of the parameter.
+         * @param initializer The initializer for the parameter.
+         */
+        function addDefaultValueAssignmentForBindingPattern(statements: Statement[], parameter: ParameterDeclaration, name: BindingPattern, initializer: Expression): void {
+            const temp = getGeneratedNameForNode(parameter);
+
+            // In cases where a binding pattern is simply '[]' or '{}',
+            // we usually don't want to emit a var declaration; however, in the presence
+            // of an initializer, we must emit that expression to preserve side effects.
+            if (name.elements.length > 0) {
+                statements.push(
+                    setEmitFlags(
+                        createVariableStatement(
+                            /*modifiers*/ undefined,
+                            createVariableDeclarationList(
+                                flattenDestructuringBinding(
+                                    parameter,
+                                    visitor,
+                                    context,
+                                    FlattenLevel.All,
+                                    temp
+                                )
+                            )
+                        ),
+                        EmitFlags.CustomPrologue
+                    )
+                );
+            }
+            else if (initializer) {
+                statements.push(
+                    setEmitFlags(
+                        createStatement(
+                            createAssignment(
+                                temp,
+                                visitNode(initializer, visitor, isExpression)
+                            )
+                        ),
+                        EmitFlags.CustomPrologue
+                    )
+                );
+            }
+        }
+
+        /**
+         * Adds statements to the body of a function-like node for parameters with initializers.
+         *
+         * @param statements The statements for the new function body.
+         * @param parameter The parameter for the function.
+         * @param name The name of the parameter.
+         * @param initializer The initializer for the parameter.
+         */
+        function addDefaultValueAssignmentForInitializer(statements: Statement[], parameter: ParameterDeclaration, name: Identifier, initializer: Expression): void {
+            initializer = visitNode(initializer, visitor, isExpression);
+            const statement = createIf(
+                createTypeCheck(getSynthesizedClone(name), "undefined"),
+                setEmitFlags(
+                    setTextRange(
+                        createBlock([
+                            createStatement(
+                                setTextRange(
+                                    createAssignment(
+                                        setEmitFlags(getMutableClone(name), EmitFlags.NoSourceMap),
+                                        setEmitFlags(initializer, EmitFlags.NoSourceMap | getEmitFlags(initializer))
+                                    ),
+                                    parameter
+                                )
+                            )
+                        ]),
+                        parameter
+                    ),
+                    EmitFlags.SingleLine | EmitFlags.NoTrailingSourceMap | EmitFlags.NoTokenSourceMaps
+                )
+            );
+            statement.startsOnNewLine = true;
+            setTextRange(statement, parameter);
+            setEmitFlags(statement, EmitFlags.NoTokenSourceMaps | EmitFlags.NoTrailingSourceMap | EmitFlags.CustomPrologue);
+            statements.push(statement);
+        }
+
+        /**
+         * Gets a value indicating whether we need to add statements to handle a rest parameter.
+         *
+         * @param node A ParameterDeclaration node.
+         * @param inConstructorWithSynthesizedSuper A value indicating whether the parameter is
+         *                                          part of a constructor declaration with a
+         *                                          synthesized call to `super`
+         */
+        function shouldAddRestParameter(node: ParameterDeclaration, inConstructorWithSynthesizedSuper: boolean) {
+            return node && node.dotDotDotToken && node.name.kind === SyntaxKind.Identifier && !inConstructorWithSynthesizedSuper;
+        }
+
+        /**
+         * Adds statements to the body of a function-like node if it contains a rest parameter.
+         *
+         * @param statements The statements for the new function body.
+         * @param node A function-like node.
+         * @param inConstructorWithSynthesizedSuper A value indicating whether the parameter is
+         *                                          part of a constructor declaration with a
+         *                                          synthesized call to `super`
+         */
+        function addRestParameterIfNeeded(statements: Statement[], node: FunctionLikeDeclaration, inConstructorWithSynthesizedSuper: boolean): void {
+            const parameter = lastOrUndefined(node.parameters);
+            if (!shouldAddRestParameter(parameter, inConstructorWithSynthesizedSuper)) {
+                return;
+            }
+
+            // `declarationName` is the name of the local declaration for the parameter.
+            const declarationName = getMutableClone(<Identifier>parameter.name);
+            setEmitFlags(declarationName, EmitFlags.NoSourceMap);
+
+            // `expressionName` is the name of the parameter used in expressions.
+            const expressionName = getSynthesizedClone(<Identifier>parameter.name);
+            const restIndex = node.parameters.length - 1;
+            const temp = createLoopVariable();
+
+            // var param = [];
+            statements.push(
+                setEmitFlags(
+                    setTextRange(
+                        createVariableStatement(
+                            /*modifiers*/ undefined,
+                            createVariableDeclarationList([
+                                createVariableDeclaration(
+                                    declarationName,
+                                    /*type*/ undefined,
+                                    createArrayLiteral([])
+                                )
+                            ])
+                        ),
+                        /*location*/ parameter
+                    ),
+                    EmitFlags.CustomPrologue
+                )
+            );
+
+            // for (var _i = restIndex; _i < arguments.length; _i++) {
+            //   param[_i - restIndex] = arguments[_i];
+            // }
+            const forStatement = createFor(
+                setTextRange(
+                    createVariableDeclarationList([
+                        createVariableDeclaration(temp, /*type*/ undefined, createLiteral(restIndex))
+                    ]),
+                    parameter
+                ),
+                setTextRange(
+                    createLessThan(
+                        temp,
+                        createPropertyAccess(createIdentifier("arguments"), "length")
+                    ),
+                    parameter
+                ),
+                setTextRange(createPostfixIncrement(temp), parameter),
+                createBlock([
+                    startOnNewLine(
+                        setTextRange(
+                            createStatement(
+                                createAssignment(
+                                    createElementAccess(
+                                        expressionName,
+                                        restIndex === 0
+                                            ? temp
+                                            : createSubtract(temp, createLiteral(restIndex))
+                                    ),
+                                    createElementAccess(createIdentifier("arguments"), temp)
+                                )
+                            ),
+                            /*location*/ parameter
+                        )
+                    )
+                ])
+            );
+
+            setEmitFlags(forStatement, EmitFlags.CustomPrologue);
+            startOnNewLine(forStatement);
+            statements.push(forStatement);
+        }
+
+        /**
+         * Adds a statement to capture the `this` of a function declaration if it is needed.
+         *
+         * @param statements The statements for the new function body.
+         * @param node A node.
+         */
+        function addCaptureThisForNodeIfNeeded(statements: Statement[], node: Node): void {
+            if (node.transformFlags & TransformFlags.ContainsCapturedLexicalThis && node.kind !== SyntaxKind.ArrowFunction) {
+                captureThisForNode(statements, node, createThis());
+            }
+        }
+
+        function captureThisForNode(statements: Statement[], node: Node, initializer: Expression | undefined, originalStatement?: Statement): void {
+            enableSubstitutionsForCapturedThis();
+            const captureThisStatement = createVariableStatement(
+                /*modifiers*/ undefined,
+                createVariableDeclarationList([
+                    createVariableDeclaration(
+                        "_this",
+                        /*type*/ undefined,
+                        initializer
+                    )
+                ])
+            );
+            setEmitFlags(captureThisStatement, EmitFlags.NoComments | EmitFlags.CustomPrologue);
+            setTextRange(captureThisStatement, originalStatement);
+            setSourceMapRange(captureThisStatement, node);
+            statements.push(captureThisStatement);
+        }
+
+        function prependCaptureNewTargetIfNeeded(statements: Statement[], node: FunctionLikeDeclaration, copyOnWrite: boolean): Statement[] {
+            if (hierarchyFacts & HierarchyFacts.NewTarget) {
+                let newTarget: Expression;
+                switch (node.kind) {
+                    case SyntaxKind.ArrowFunction:
+                        return statements;
+
+                    case SyntaxKind.MethodDeclaration:
+                    case SyntaxKind.GetAccessor:
+                    case SyntaxKind.SetAccessor:
+                        // Methods and accessors cannot be constructors, so 'new.target' will
+                        // always return 'undefined'.
+                        newTarget = createVoidZero();
+                        break;
+
+                    case SyntaxKind.Constructor:
+                        // Class constructors can only be called with `new`, so `this.constructor`
+                        // should be relatively safe to use.
+                        newTarget = createPropertyAccess(
+                            setEmitFlags(createThis(), EmitFlags.NoSubstitution),
+                            "constructor"
+                        );
+                        break;
+
+                    case SyntaxKind.FunctionDeclaration:
+                    case SyntaxKind.FunctionExpression:
+                        // Functions can be called or constructed, and may have a `this` due to
+                        // being a member or when calling an imported function via `other_1.f()`.
+                        newTarget = createConditional(
+                            createLogicalAnd(
+                                setEmitFlags(createThis(), EmitFlags.NoSubstitution),
+                                createBinary(
+                                    setEmitFlags(createThis(), EmitFlags.NoSubstitution),
+                                    SyntaxKind.InstanceOfKeyword,
+                                    getLocalName(node)
+                                )
+                            ),
+                            createPropertyAccess(
+                                setEmitFlags(createThis(), EmitFlags.NoSubstitution),
+                                "constructor"
+                            ),
+                            createVoidZero()
+                        );
+                        break;
+
+                    default:
+                        Debug.failBadSyntaxKind(node);
+                        break;
+                }
+
+                const captureNewTargetStatement = createVariableStatement(
+                    /*modifiers*/ undefined,
+                    createVariableDeclarationList([
+                        createVariableDeclaration(
+                            "_newTarget",
+                            /*type*/ undefined,
+                            newTarget
+                        )
+                    ])
+                );
+
+                if (copyOnWrite) {
+                    return [captureNewTargetStatement, ...statements];
+                }
+
+                statements.unshift(captureNewTargetStatement);
+            }
+
+            return statements;
+        }
+
+        /**
+         * Adds statements to the class body function for a class to define the members of the
+         * class.
+         *
+         * @param statements The statements for the class body function.
+         * @param node The ClassExpression or ClassDeclaration node.
+         */
+        function addClassMembers(statements: Statement[], node: ClassExpression | ClassDeclaration): void {
+            for (const member of node.members) {
+                switch (member.kind) {
+                    case SyntaxKind.SemicolonClassElement:
+                        statements.push(transformSemicolonClassElementToStatement(<SemicolonClassElement>member));
+                        break;
+
+                    case SyntaxKind.MethodDeclaration:
+                        statements.push(transformClassMethodDeclarationToStatement(getClassMemberPrefix(node, member), <MethodDeclaration>member, node));
+                        break;
+
+                    case SyntaxKind.GetAccessor:
+                    case SyntaxKind.SetAccessor:
+                        const accessors = getAllAccessorDeclarations(node.members, <AccessorDeclaration>member);
+                        if (member === accessors.firstAccessor) {
+                            statements.push(transformAccessorsToStatement(getClassMemberPrefix(node, member), accessors, node));
+                        }
+
+                        break;
+
+                    case SyntaxKind.Constructor:
+                        // Constructors are handled in visitClassExpression/visitClassDeclaration
+                        break;
+
+                    default:
+                        Debug.failBadSyntaxKind(node);
+                        break;
+                }
+            }
+        }
+
+        /**
+         * Transforms a SemicolonClassElement into a statement for a class body function.
+         *
+         * @param member The SemicolonClassElement node.
+         */
+        function transformSemicolonClassElementToStatement(member: SemicolonClassElement) {
+            return setTextRange(createEmptyStatement(), member);
+        }
+
+        /**
+         * Transforms a MethodDeclaration into a statement for a class body function.
+         *
+         * @param receiver The receiver for the member.
+         * @param member The MethodDeclaration node.
+         */
+        function transformClassMethodDeclarationToStatement(receiver: LeftHandSideExpression, member: MethodDeclaration, container: Node) {
+            const ancestorFacts = enterSubtree(HierarchyFacts.None, HierarchyFacts.None);
+            const commentRange = getCommentRange(member);
+            const sourceMapRange = getSourceMapRange(member);
+            const memberName = createMemberAccessForPropertyName(receiver, visitNode(member.name, visitor, isPropertyName), /*location*/ member.name);
+            const memberFunction = transformFunctionLikeToExpression(member, /*location*/ member, /*name*/ undefined, container);
+            setEmitFlags(memberFunction, EmitFlags.NoComments);
+            setSourceMapRange(memberFunction, sourceMapRange);
+
+            const statement = setTextRange(
+                createStatement(
+                    createAssignment(memberName, memberFunction)
+                ),
+                /*location*/ member
+            );
+
+            setOriginalNode(statement, member);
+            setCommentRange(statement, commentRange);
+
+            // The location for the statement is used to emit comments only.
+            // No source map should be emitted for this statement to align with the
+            // old emitter.
+            setEmitFlags(statement, EmitFlags.NoSourceMap);
+
+            exitSubtree(ancestorFacts, HierarchyFacts.PropagateNewTargetMask, hierarchyFacts & HierarchyFacts.PropagateNewTargetMask ? HierarchyFacts.NewTarget : HierarchyFacts.None);
+            return statement;
+        }
+
+        /**
+         * Transforms a set of related of get/set accessors into a statement for a class body function.
+         *
+         * @param receiver The receiver for the member.
+         * @param accessors The set of related get/set accessors.
+         */
+        function transformAccessorsToStatement(receiver: LeftHandSideExpression, accessors: AllAccessorDeclarations, container: Node): Statement {
+            const statement = createStatement(transformAccessorsToExpression(receiver, accessors, container, /*startsOnNewLine*/ false));
+            // The location for the statement is used to emit source maps only.
+            // No comments should be emitted for this statement to align with the
+            // old emitter.
+            setEmitFlags(statement, EmitFlags.NoComments);
+            setSourceMapRange(statement, getSourceMapRange(accessors.firstAccessor));
+            return statement;
+        }
+
+        /**
+         * Transforms a set of related get/set accessors into an expression for either a class
+         * body function or an ObjectLiteralExpression with computed properties.
+         *
+         * @param receiver The receiver for the member.
+         */
+        function transformAccessorsToExpression(receiver: LeftHandSideExpression, { firstAccessor, getAccessor, setAccessor }: AllAccessorDeclarations, container: Node, startsOnNewLine: boolean): Expression {
+            const ancestorFacts = enterSubtree(HierarchyFacts.None, HierarchyFacts.None);
+
+            // To align with source maps in the old emitter, the receiver and property name
+            // arguments are both mapped contiguously to the accessor name.
+            const target = getMutableClone(receiver);
+            setEmitFlags(target, EmitFlags.NoComments | EmitFlags.NoTrailingSourceMap);
+            setSourceMapRange(target, firstAccessor.name);
+
+            const propertyName = createExpressionForPropertyName(visitNode(firstAccessor.name, visitor, isPropertyName));
+            setEmitFlags(propertyName, EmitFlags.NoComments | EmitFlags.NoLeadingSourceMap);
+            setSourceMapRange(propertyName, firstAccessor.name);
+
+            const properties: ObjectLiteralElementLike[] = [];
+            if (getAccessor) {
+                const getterFunction = transformFunctionLikeToExpression(getAccessor, /*location*/ undefined, /*name*/ undefined, container);
+                setSourceMapRange(getterFunction, getSourceMapRange(getAccessor));
+                setEmitFlags(getterFunction, EmitFlags.NoLeadingComments);
+                const getter = createPropertyAssignment("get", getterFunction);
+                setCommentRange(getter, getCommentRange(getAccessor));
+                properties.push(getter);
+            }
+
+            if (setAccessor) {
+                const setterFunction = transformFunctionLikeToExpression(setAccessor, /*location*/ undefined, /*name*/ undefined, container);
+                setSourceMapRange(setterFunction, getSourceMapRange(setAccessor));
+                setEmitFlags(setterFunction, EmitFlags.NoLeadingComments);
+                const setter = createPropertyAssignment("set", setterFunction);
+                setCommentRange(setter, getCommentRange(setAccessor));
+                properties.push(setter);
+            }
+
+            properties.push(
+                createPropertyAssignment("enumerable", createTrue()),
+                createPropertyAssignment("configurable", createTrue())
+            );
+
+            const call = createCall(
+                createPropertyAccess(createIdentifier("Object"), "defineProperty"),
+                /*typeArguments*/ undefined,
+                [
+                    target,
+                    propertyName,
+                    createObjectLiteral(properties, /*multiLine*/ true)
+                ]
+            );
+            if (startsOnNewLine) {
+                call.startsOnNewLine = true;
+            }
+
+            exitSubtree(ancestorFacts, HierarchyFacts.PropagateNewTargetMask, hierarchyFacts & HierarchyFacts.PropagateNewTargetMask ? HierarchyFacts.NewTarget : HierarchyFacts.None);
+            return call;
+        }
+
+        /**
+         * Visits an ArrowFunction and transforms it into a FunctionExpression.
+         *
+         * @param node An ArrowFunction node.
+         */
+        function visitArrowFunction(node: ArrowFunction) {
+            if (node.transformFlags & TransformFlags.ContainsLexicalThis) {
+                enableSubstitutionsForCapturedThis();
+            }
+            const savedConvertedLoopState = convertedLoopState;
+            convertedLoopState = undefined;
+            const ancestorFacts = enterSubtree(HierarchyFacts.ArrowFunctionExcludes, HierarchyFacts.ArrowFunctionIncludes);
+            const func = createFunctionExpression(
+                /*modifiers*/ undefined,
+                /*asteriskToken*/ undefined,
+                /*name*/ undefined,
+                /*typeParameters*/ undefined,
+                visitParameterList(node.parameters, visitor, context),
+                /*type*/ undefined,
+                transformFunctionBody(node)
+            );
+            setTextRange(func, node);
+            setOriginalNode(func, node);
+            setEmitFlags(func, EmitFlags.CapturesThis);
+            exitSubtree(ancestorFacts, HierarchyFacts.None, HierarchyFacts.None);
+            convertedLoopState = savedConvertedLoopState;
+            return func;
+        }
+
+        /**
+         * Visits a FunctionExpression node.
+         *
+         * @param node a FunctionExpression node.
+         */
+        function visitFunctionExpression(node: FunctionExpression): Expression {
+            const ancestorFacts = getEmitFlags(node) & EmitFlags.AsyncFunctionBody
+                ? enterSubtree(HierarchyFacts.AsyncFunctionBodyExcludes, HierarchyFacts.AsyncFunctionBodyIncludes)
+                : enterSubtree(HierarchyFacts.FunctionExcludes, HierarchyFacts.FunctionIncludes);
+            const savedConvertedLoopState = convertedLoopState;
+            convertedLoopState = undefined;
+
+            const parameters = visitParameterList(node.parameters, visitor, context);
+            const body = node.transformFlags & TransformFlags.ES2015
+                ? transformFunctionBody(node)
+                : visitFunctionBodyDownLevel(node);
+            const name = hierarchyFacts & HierarchyFacts.NewTarget
+                ? getLocalName(node)
+                : node.name;
+
+            exitSubtree(ancestorFacts, HierarchyFacts.PropagateNewTargetMask, HierarchyFacts.None);
+            convertedLoopState = savedConvertedLoopState;
+            return updateFunctionExpression(
+                node,
+                /*modifiers*/ undefined,
+                node.asteriskToken,
+                name,
+                /*typeParameters*/ undefined,
+                parameters,
+                /*type*/ undefined,
+                body
+            );
+        }
+
+        /**
+         * Visits a FunctionDeclaration node.
+         *
+         * @param node a FunctionDeclaration node.
+         */
+        function visitFunctionDeclaration(node: FunctionDeclaration): FunctionDeclaration {
+            const savedConvertedLoopState = convertedLoopState;
+            convertedLoopState = undefined;
+            const ancestorFacts = enterSubtree(HierarchyFacts.FunctionExcludes, HierarchyFacts.FunctionIncludes);
+            const parameters = visitParameterList(node.parameters, visitor, context);
+            const body = node.transformFlags & TransformFlags.ES2015
+                ? transformFunctionBody(node)
+                : visitFunctionBodyDownLevel(node);
+            const name = hierarchyFacts & HierarchyFacts.NewTarget
+                ? getLocalName(node)
+                : node.name;
+
+            exitSubtree(ancestorFacts, HierarchyFacts.PropagateNewTargetMask, HierarchyFacts.None);
+            convertedLoopState = savedConvertedLoopState;
+            return updateFunctionDeclaration(
+                node,
+                /*decorators*/ undefined,
+                visitNodes(node.modifiers, visitor, isModifier),
+                node.asteriskToken,
+                name,
+                /*typeParameters*/ undefined,
+                parameters,
+                /*type*/ undefined,
+                body
+            );
+        }
+
+        /**
+         * Transforms a function-like node into a FunctionExpression.
+         *
+         * @param node The function-like node to transform.
+         * @param location The source-map location for the new FunctionExpression.
+         * @param name The name of the new FunctionExpression.
+         */
+        function transformFunctionLikeToExpression(node: FunctionLikeDeclaration, location: TextRange, name: Identifier, container: Node): FunctionExpression {
+            const savedConvertedLoopState = convertedLoopState;
+            convertedLoopState = undefined;
+            const ancestorFacts = container && isClassLike(container) && !hasModifier(node, ModifierFlags.Static)
+                ? enterSubtree(HierarchyFacts.FunctionExcludes, HierarchyFacts.FunctionIncludes | HierarchyFacts.NonStaticClassElement)
+                : enterSubtree(HierarchyFacts.FunctionExcludes, HierarchyFacts.FunctionIncludes);
+            const parameters = visitParameterList(node.parameters, visitor, context);
+            const body = transformFunctionBody(node);
+            if (hierarchyFacts & HierarchyFacts.NewTarget && !name && (node.kind === SyntaxKind.FunctionDeclaration || node.kind === SyntaxKind.FunctionExpression)) {
+                name = getGeneratedNameForNode(node);
+            }
+
+            exitSubtree(ancestorFacts, HierarchyFacts.PropagateNewTargetMask, HierarchyFacts.None);
+            convertedLoopState = savedConvertedLoopState;
+            return setOriginalNode(
+                setTextRange(
+                    createFunctionExpression(
+                        /*modifiers*/ undefined,
+                        node.asteriskToken,
+                        name,
+                        /*typeParameters*/ undefined,
+                        parameters,
+                        /*type*/ undefined,
+                        body
+                    ),
+                    location
+                ),
+                /*original*/ node
+            );
+        }
+
+        /**
+         * Transforms the body of a function-like node.
+         *
+         * @param node A function-like node.
+         */
+        function transformFunctionBody(node: FunctionLikeDeclaration) {
+            let multiLine = false; // indicates whether the block *must* be emitted as multiple lines
+            let singleLine = false; // indicates whether the block *may* be emitted as a single line
+            let statementsLocation: TextRange;
+            let closeBraceLocation: TextRange;
+
+            const statements: Statement[] = [];
+            const body = node.body;
+            let statementOffset: number;
+
+            resumeLexicalEnvironment();
+            if (isBlock(body)) {
+                // ensureUseStrict is false because no new prologue-directive should be added.
+                // addStandardPrologue will put already-existing directives at the beginning of the target statement-array
+                statementOffset = addStandardPrologue(statements, body.statements, /*ensureUseStrict*/ false);
+            }
+
+            addCaptureThisForNodeIfNeeded(statements, node);
+            addDefaultValueAssignmentsIfNeeded(statements, node);
+            addRestParameterIfNeeded(statements, node, /*inConstructorWithSynthesizedSuper*/ false);
+
+            // If we added any generated statements, this must be a multi-line block.
+            if (!multiLine && statements.length > 0) {
+                multiLine = true;
+            }
+
+            if (isBlock(body)) {
+                // addCustomPrologue puts already-existing directives at the beginning of the target statement-array
+                statementOffset = addCustomPrologue(statements, body.statements, statementOffset, visitor);
+
+                statementsLocation = body.statements;
+                addRange(statements, visitNodes(body.statements, visitor, isStatement, statementOffset));
+
+                // If the original body was a multi-line block, this must be a multi-line block.
+                if (!multiLine && body.multiLine) {
+                    multiLine = true;
+                }
+            }
+            else {
+                Debug.assert(node.kind === SyntaxKind.ArrowFunction);
+
+                // To align with the old emitter, we use a synthetic end position on the location
+                // for the statement list we synthesize when we down-level an arrow function with
+                // an expression function body. This prevents both comments and source maps from
+                // being emitted for the end position only.
+                statementsLocation = moveRangeEnd(body, -1);
+
+                const equalsGreaterThanToken = (<ArrowFunction>node).equalsGreaterThanToken;
+                if (!nodeIsSynthesized(equalsGreaterThanToken) && !nodeIsSynthesized(body)) {
+                    if (rangeEndIsOnSameLineAsRangeStart(equalsGreaterThanToken, body, currentSourceFile)) {
+                        singleLine = true;
+                    }
+                    else {
+                        multiLine = true;
+                    }
+                }
+
+                const expression = visitNode(body, visitor, isExpression);
+                const returnStatement = createReturn(expression);
+                setTextRange(returnStatement, body);
+                setEmitFlags(returnStatement, EmitFlags.NoTokenSourceMaps | EmitFlags.NoTrailingSourceMap | EmitFlags.NoTrailingComments);
+                statements.push(returnStatement);
+
+                // To align with the source map emit for the old emitter, we set a custom
+                // source map location for the close brace.
+                closeBraceLocation = body;
+            }
+
+            const lexicalEnvironment = context.endLexicalEnvironment();
+            addRange(statements, lexicalEnvironment);
+
+            prependCaptureNewTargetIfNeeded(statements, node, /*copyOnWrite*/ false);
+
+            // If we added any final generated statements, this must be a multi-line block
+            if (!multiLine && lexicalEnvironment && lexicalEnvironment.length) {
+                multiLine = true;
+            }
+
+            const block = createBlock(setTextRange(createNodeArray(statements), statementsLocation), multiLine);
+            setTextRange(block, node.body);
+            if (!multiLine && singleLine) {
+                setEmitFlags(block, EmitFlags.SingleLine);
+            }
+
+            if (closeBraceLocation) {
+                setTokenSourceMapRange(block, SyntaxKind.CloseBraceToken, closeBraceLocation);
+            }
+
+            setOriginalNode(block, node.body);
+            return block;
+        }
+
+        function visitFunctionBodyDownLevel(node: FunctionDeclaration | FunctionExpression) {
+            const updated = visitFunctionBody(node.body, functionBodyVisitor, context);
+            return updateBlock(
+                updated,
+                setTextRange(
+                    createNodeArray(
+                        prependCaptureNewTargetIfNeeded(updated.statements, node, /*copyOnWrite*/ true)
+                    ),
+                    /*location*/ updated.statements
+                )
+            );
+        }
+
+        function visitBlock(node: Block, isFunctionBody: boolean): Block {
+            if (isFunctionBody) {
+                // A function body is not a block scope.
+                return visitEachChild(node, visitor, context);
+            }
+            const ancestorFacts = hierarchyFacts & HierarchyFacts.IterationStatement
+                ? enterSubtree(HierarchyFacts.IterationStatementBlockExcludes, HierarchyFacts.IterationStatementBlockIncludes)
+                : enterSubtree(HierarchyFacts.BlockExcludes, HierarchyFacts.BlockIncludes);
+            const updated = visitEachChild(node, visitor, context);
+            exitSubtree(ancestorFacts, HierarchyFacts.None, HierarchyFacts.None);
+            return updated;
+        }
+
+        /**
+         * Visits an ExpressionStatement that contains a destructuring assignment.
+         *
+         * @param node An ExpressionStatement node.
+         */
+        function visitExpressionStatement(node: ExpressionStatement): Statement {
+            // If we are here it is most likely because our expression is a destructuring assignment.
+            switch (node.expression.kind) {
+                case SyntaxKind.ParenthesizedExpression:
+                    return updateStatement(node, visitParenthesizedExpression(<ParenthesizedExpression>node.expression, /*needsDestructuringValue*/ false));
+                case SyntaxKind.BinaryExpression:
+                    return updateStatement(node, visitBinaryExpression(<BinaryExpression>node.expression, /*needsDestructuringValue*/ false));
+            }
+            return visitEachChild(node, visitor, context);
+        }
+
+        /**
+         * Visits a ParenthesizedExpression that may contain a destructuring assignment.
+         *
+         * @param node A ParenthesizedExpression node.
+         * @param needsDestructuringValue A value indicating whether we need to hold onto the rhs
+         *                                of a destructuring assignment.
+         */
+        function visitParenthesizedExpression(node: ParenthesizedExpression, needsDestructuringValue: boolean): ParenthesizedExpression {
+            // If we are here it is most likely because our expression is a destructuring assignment.
+            if (!needsDestructuringValue) {
+                // By default we always emit the RHS at the end of a flattened destructuring
+                // expression. If we are in a state where we do not need the destructuring value,
+                // we pass that information along to the children that care about it.
+                switch (node.expression.kind) {
+                    case SyntaxKind.ParenthesizedExpression:
+                        return updateParen(node, visitParenthesizedExpression(<ParenthesizedExpression>node.expression, /*needsDestructuringValue*/ false));
+                    case SyntaxKind.BinaryExpression:
+                        return updateParen(node, visitBinaryExpression(<BinaryExpression>node.expression, /*needsDestructuringValue*/ false));
+                }
+            }
+            return visitEachChild(node, visitor, context);
+        }
+
+        /**
+         * Visits a BinaryExpression that contains a destructuring assignment.
+         *
+         * @param node A BinaryExpression node.
+         * @param needsDestructuringValue A value indicating whether we need to hold onto the rhs
+         *                                of a destructuring assignment.
+         */
+        function visitBinaryExpression(node: BinaryExpression, needsDestructuringValue: boolean): Expression {
+            // If we are here it is because this is a destructuring assignment.
+            if (isDestructuringAssignment(node)) {
+                return flattenDestructuringAssignment(
+                    <DestructuringAssignment>node,
+                    visitor,
+                    context,
+                    FlattenLevel.All,
+                    needsDestructuringValue);
+            }
+            return visitEachChild(node, visitor, context);
+        }
+
+        function visitVariableStatement(node: VariableStatement): Statement {
+            const ancestorFacts = enterSubtree(HierarchyFacts.None, hasModifier(node, ModifierFlags.Export) ? HierarchyFacts.ExportedVariableStatement : HierarchyFacts.None);
+            let updated: Statement;
+            if (convertedLoopState && (node.declarationList.flags & NodeFlags.BlockScoped) === 0) {
+                // we are inside a converted loop - hoist variable declarations
+                let assignments: Expression[];
+                for (const decl of node.declarationList.declarations) {
+                    hoistVariableDeclarationDeclaredInConvertedLoop(convertedLoopState, decl);
+                    if (decl.initializer) {
+                        let assignment: Expression;
+                        if (isBindingPattern(decl.name)) {
+                            assignment = flattenDestructuringAssignment(
+                                decl,
+                                visitor,
+                                context,
+                                FlattenLevel.All
+                            );
+                        }
+                        else {
+                            assignment = createBinary(<Identifier>decl.name, SyntaxKind.EqualsToken, visitNode(decl.initializer, visitor, isExpression));
+                            setTextRange(assignment, decl);
+                        }
+
+                        assignments = append(assignments, assignment);
+                    }
+                }
+                if (assignments) {
+                    updated = setTextRange(createStatement(inlineExpressions(assignments)), node);
+                }
+                else {
+                    // none of declarations has initializer - the entire variable statement can be deleted
+                    updated = undefined;
+                }
+            }
+            else {
+                updated = visitEachChild(node, visitor, context);
+            }
+
+            exitSubtree(ancestorFacts, HierarchyFacts.None, HierarchyFacts.None);
+            return updated;
+        }
+
+        /**
+         * Visits a VariableDeclarationList that is block scoped (e.g. `let` or `const`).
+         *
+         * @param node A VariableDeclarationList node.
+         */
+        function visitVariableDeclarationList(node: VariableDeclarationList): VariableDeclarationList {
+            if (node.transformFlags & TransformFlags.ES2015) {
+                if (node.flags & NodeFlags.BlockScoped) {
+                    enableSubstitutionsForBlockScopedBindings();
+                }
+
+                const declarations = flatMap(node.declarations, node.flags & NodeFlags.Let
+                    ? visitVariableDeclarationInLetDeclarationList
+                    : visitVariableDeclaration);
+
+                const declarationList = createVariableDeclarationList(declarations);
+                setOriginalNode(declarationList, node);
+                setTextRange(declarationList, node);
+                setCommentRange(declarationList, node);
+
+                if (node.transformFlags & TransformFlags.ContainsBindingPattern
+                    && (isBindingPattern(node.declarations[0].name)
+                        || isBindingPattern(lastOrUndefined(node.declarations).name))) {
+                    // If the first or last declaration is a binding pattern, we need to modify
+                    // the source map range for the declaration list.
+                    const firstDeclaration = firstOrUndefined(declarations);
+                    const lastDeclaration = lastOrUndefined(declarations);
+                    setSourceMapRange(declarationList, createRange(firstDeclaration.pos, lastDeclaration.end));
+                }
+
+                return declarationList;
+            }
+            return visitEachChild(node, visitor, context);
+        }
+
+        /**
+         * Gets a value indicating whether we should emit an explicit initializer for a variable
+         * declaration in a `let` declaration list.
+         *
+         * @param node A VariableDeclaration node.
+         */
+        function shouldEmitExplicitInitializerForLetDeclaration(node: VariableDeclaration) {
+            // Nested let bindings might need to be initialized explicitly to preserve
+            // ES6 semantic:
+            //
+            //  { let x = 1; }
+            //  { let x; } // x here should be undefined. not 1
+            //
+            // Top level bindings never collide with anything and thus don't require
+            // explicit initialization. As for nested let bindings there are two cases:
+            //
+            // - Nested let bindings that were not renamed definitely should be
+            //   initialized explicitly:
+            //
+            //    { let x = 1; }
+            //    { let x; if (some-condition) { x = 1}; if (x) { /*1*/ } }
+            //
+            //   Without explicit initialization code in /*1*/ can be executed even if
+            //   some-condition is evaluated to false.
+            //
+            // - Renaming introduces fresh name that should not collide with any
+            //   existing names, however renamed bindings sometimes also should be
+            //   explicitly initialized. One particular case: non-captured binding
+            //   declared inside loop body (but not in loop initializer):
+            //
+            //    let x;
+            //    for (;;) {
+            //        let x;
+            //    }
+            //
+            //   In downlevel codegen inner 'x' will be renamed so it won't collide
+            //   with outer 'x' however it will should be reset on every iteration as
+            //   if it was declared anew.
+            //
+            //   * Why non-captured binding?
+            //     - Because if loop contains block scoped binding captured in some
+            //       function then loop body will be rewritten to have a fresh scope
+            //       on every iteration so everything will just work.
+            //
+            //   * Why loop initializer is excluded?
+            //     - Since we've introduced a fresh name it already will be undefined.
+
+            const flags = resolver.getNodeCheckFlags(node);
+            const isCapturedInFunction = flags & NodeCheckFlags.CapturedBlockScopedBinding;
+            const isDeclaredInLoop = flags & NodeCheckFlags.BlockScopedBindingInLoop;
+            const emittedAsTopLevel =
+                (hierarchyFacts & HierarchyFacts.TopLevel) !== 0
+                || (isCapturedInFunction
+                    && isDeclaredInLoop
+                    && (hierarchyFacts & HierarchyFacts.IterationStatementBlock) !== 0);
+
+            const emitExplicitInitializer =
+                !emittedAsTopLevel
+                && (hierarchyFacts & HierarchyFacts.ForInOrForOfStatement) === 0
+                && (!resolver.isDeclarationWithCollidingName(node)
+                    || (isDeclaredInLoop
+                        && !isCapturedInFunction
+                        && (hierarchyFacts & (HierarchyFacts.ForStatement | HierarchyFacts.ForInOrForOfStatement)) === 0));
+
+            return emitExplicitInitializer;
+        }
+
+        /**
+         * Visits a VariableDeclaration in a `let` declaration list.
+         *
+         * @param node A VariableDeclaration node.
+         */
+        function visitVariableDeclarationInLetDeclarationList(node: VariableDeclaration) {
+            // For binding pattern names that lack initializers there is no point to emit
+            // explicit initializer since downlevel codegen for destructuring will fail
+            // in the absence of initializer so all binding elements will say uninitialized
+            const name = node.name;
+            if (isBindingPattern(name)) {
+                return visitVariableDeclaration(node);
+            }
+
+            if (!node.initializer && shouldEmitExplicitInitializerForLetDeclaration(node)) {
+                const clone = getMutableClone(node);
+                clone.initializer = createVoidZero();
+                return clone;
+            }
+
+            return visitEachChild(node, visitor, context);
+        }
+
+        /**
+         * Visits a VariableDeclaration node with a binding pattern.
+         *
+         * @param node A VariableDeclaration node.
+         */
+        function visitVariableDeclaration(node: VariableDeclaration): VisitResult<VariableDeclaration> {
+            const ancestorFacts = enterSubtree(HierarchyFacts.ExportedVariableStatement, HierarchyFacts.None);
+            let updated: VisitResult<VariableDeclaration>;
+            if (isBindingPattern(node.name)) {
+                updated = flattenDestructuringBinding(
+                    node,
+                    visitor,
+                    context,
+                    FlattenLevel.All,
+                    /*value*/ undefined,
+                    (ancestorFacts & HierarchyFacts.ExportedVariableStatement) !== 0
+                );
+            }
+            else {
+                updated = visitEachChild(node, visitor, context);
+            }
+
+            exitSubtree(ancestorFacts, HierarchyFacts.None, HierarchyFacts.None);
+            return updated;
+        }
+
+        function recordLabel(node: LabeledStatement) {
+            convertedLoopState.labels.set(node.label.text, node.label.text);
+        }
+
+        function resetLabel(node: LabeledStatement) {
+            convertedLoopState.labels.set(node.label.text, undefined);
+        }
+
+        function visitLabeledStatement(node: LabeledStatement): VisitResult<Statement> {
+            if (convertedLoopState && !convertedLoopState.labels) {
+                convertedLoopState.labels = createMap<string>();
+            }
+            const statement = unwrapInnermostStatementOfLabel(node, convertedLoopState && recordLabel);
+            return isIterationStatement(statement, /*lookInLabeledStatements*/ false)
+                ? visitIterationStatement(statement, /*outermostLabeledStatement*/ node)
+                : restoreEnclosingLabel(visitNode(statement, visitor, isStatement), node, convertedLoopState && resetLabel);
+        }
+
+        function visitIterationStatement(node: IterationStatement, outermostLabeledStatement: LabeledStatement) {
+            switch (node.kind) {
+                case SyntaxKind.DoStatement:
+                case SyntaxKind.WhileStatement:
+                    return visitDoOrWhileStatement(<DoStatement | WhileStatement>node, outermostLabeledStatement);
+                case SyntaxKind.ForStatement:
+                    return visitForStatement(<ForStatement>node, outermostLabeledStatement);
+                case SyntaxKind.ForInStatement:
+                    return visitForInStatement(<ForInStatement>node, outermostLabeledStatement);
+                case SyntaxKind.ForOfStatement:
+                    return visitForOfStatement(<ForOfStatement>node, outermostLabeledStatement);
+            }
+        }
+
+        function visitIterationStatementWithFacts(excludeFacts: HierarchyFacts, includeFacts: HierarchyFacts, node: IterationStatement, outermostLabeledStatement: LabeledStatement, convert?: LoopConverter) {
+            const ancestorFacts = enterSubtree(excludeFacts, includeFacts);
+            const updated = convertIterationStatementBodyIfNecessary(node, outermostLabeledStatement, convert);
+            exitSubtree(ancestorFacts, HierarchyFacts.None, HierarchyFacts.None);
+            return updated;
+        }
+
+        function visitDoOrWhileStatement(node: DoStatement | WhileStatement, outermostLabeledStatement: LabeledStatement) {
+            return visitIterationStatementWithFacts(
+                HierarchyFacts.DoOrWhileStatementExcludes,
+                HierarchyFacts.DoOrWhileStatementIncludes,
+                node,
+                outermostLabeledStatement);
+        }
+
+        function visitForStatement(node: ForStatement, outermostLabeledStatement: LabeledStatement) {
+            return visitIterationStatementWithFacts(
+                HierarchyFacts.ForStatementExcludes,
+                HierarchyFacts.ForStatementIncludes,
+                node,
+                outermostLabeledStatement);
+        }
+
+        function visitForInStatement(node: ForInStatement, outermostLabeledStatement: LabeledStatement) {
+            return visitIterationStatementWithFacts(
+                HierarchyFacts.ForInOrForOfStatementExcludes,
+                HierarchyFacts.ForInOrForOfStatementIncludes,
+                node,
+                outermostLabeledStatement);
+        }
+
+        function visitForOfStatement(node: ForOfStatement, outermostLabeledStatement: LabeledStatement): VisitResult<Statement> {
+            return visitIterationStatementWithFacts(
+                HierarchyFacts.ForInOrForOfStatementExcludes,
+                HierarchyFacts.ForInOrForOfStatementIncludes,
+                node,
+                outermostLabeledStatement,
+                compilerOptions.downlevelIteration ? convertForOfStatementForIterable : convertForOfStatementForArray);
+        }
+
+        function convertForOfStatementHead(node: ForOfStatement, boundValue: Expression, convertedLoopBodyStatements: Statement[]) {
+            const statements: Statement[] = [];
+            if (isVariableDeclarationList(node.initializer)) {
+                if (node.initializer.flags & NodeFlags.BlockScoped) {
+                    enableSubstitutionsForBlockScopedBindings();
+                }
+
+                const firstOriginalDeclaration = firstOrUndefined(node.initializer.declarations);
+                if (firstOriginalDeclaration && isBindingPattern(firstOriginalDeclaration.name)) {
+                    // This works whether the declaration is a var, let, or const.
+                    // It will use rhsIterationValue _a[_i] as the initializer.
+                    const declarations = flattenDestructuringBinding(
+                        firstOriginalDeclaration,
+                        visitor,
+                        context,
+                        FlattenLevel.All,
+                        boundValue
+                    );
+
+                    const declarationList = setTextRange(createVariableDeclarationList(declarations), node.initializer);
+                    setOriginalNode(declarationList, node.initializer);
+
+                    // Adjust the source map range for the first declaration to align with the old
+                    // emitter.
+                    const firstDeclaration = declarations[0];
+                    const lastDeclaration = lastOrUndefined(declarations);
+                    setSourceMapRange(declarationList, createRange(firstDeclaration.pos, lastDeclaration.end));
+
+                    statements.push(
+                        createVariableStatement(
+                            /*modifiers*/ undefined,
+                            declarationList
+                        )
+                    );
+                }
+                else {
+                    // The following call does not include the initializer, so we have
+                    // to emit it separately.
+                    statements.push(
+                        setTextRange(
+                            createVariableStatement(
+                                /*modifiers*/ undefined,
+                                setOriginalNode(
+                                    setTextRange(
+                                        createVariableDeclarationList([
+                                            createVariableDeclaration(
+                                                firstOriginalDeclaration ? firstOriginalDeclaration.name : createTempVariable(/*recordTempVariable*/ undefined),
+                                                /*type*/ undefined,
+                                                boundValue
+                                            )
+                                        ]),
+                                        moveRangePos(node.initializer, -1)
+                                    ),
+                                    node.initializer
+                                )
+                            ),
+                            moveRangeEnd(node.initializer, -1)
+                        )
+                    );
+                }
+            }
+            else {
+                // Initializer is an expression. Emit the expression in the body, so that it's
+                // evaluated on every iteration.
+                const assignment = createAssignment(node.initializer, boundValue);
+                if (isDestructuringAssignment(assignment)) {
+                    aggregateTransformFlags(assignment);
+                    statements.push(createStatement(visitBinaryExpression(assignment, /*needsDestructuringValue*/ false)));
+                }
+                else {
+                    assignment.end = node.initializer.end;
+                    statements.push(setTextRange(createStatement(visitNode(assignment, visitor, isExpression)), moveRangeEnd(node.initializer, -1)));
+                }
+            }
+
+            let bodyLocation: TextRange;
+            let statementsLocation: TextRange;
+            if (convertedLoopBodyStatements) {
+                addRange(statements, convertedLoopBodyStatements);
+            }
+            else {
+                const statement = visitNode(node.statement, visitor, isStatement, liftToBlock);
+                if (isBlock(statement)) {
+                    addRange(statements, statement.statements);
+                    bodyLocation = statement;
+                    statementsLocation = statement.statements;
+                }
+                else {
+                    statements.push(statement);
+                }
+            }
+
+            // The old emitter does not emit source maps for the block.
+            // We add the location to preserve comments.
+            return setEmitFlags(
+                setTextRange(
+                    createBlock(
+                        setTextRange(createNodeArray(statements), statementsLocation),
+                        /*multiLine*/ true
+                    ),
+                    bodyLocation,
+                ),
+                EmitFlags.NoSourceMap | EmitFlags.NoTokenSourceMaps
+            );
+        }
+
+        function convertForOfStatementForArray(node: ForOfStatement, outermostLabeledStatement: LabeledStatement, convertedLoopBodyStatements: Statement[]): Statement {
+            // The following ES6 code:
+            //
+            //    for (let v of expr) { }
+            //
+            // should be emitted as
+            //
+            //    for (var _i = 0, _a = expr; _i < _a.length; _i++) {
+            //        var v = _a[_i];
+            //    }
+            //
+            // where _a and _i are temps emitted to capture the RHS and the counter,
+            // respectively.
+            // When the left hand side is an expression instead of a let declaration,
+            // the "let v" is not emitted.
+            // When the left hand side is a let/const, the v is renamed if there is
+            // another v in scope.
+            // Note that all assignments to the LHS are emitted in the body, including
+            // all destructuring.
+            // Note also that because an extra statement is needed to assign to the LHS,
+            // for-of bodies are always emitted as blocks.
+
+            const expression = visitNode(node.expression, visitor, isExpression);
+
+            // In the case where the user wrote an identifier as the RHS, like this:
+            //
+            //     for (let v of arr) { }
+            //
+            // we don't want to emit a temporary variable for the RHS, just use it directly.
+            const counter = createLoopVariable();
+            const rhsReference = isIdentifier(expression) ? getGeneratedNameForNode(expression) : createTempVariable(/*recordTempVariable*/ undefined);
+
+            // The old emitter does not emit source maps for the expression
+            setEmitFlags(expression, EmitFlags.NoSourceMap | getEmitFlags(expression));
+
+            const forStatement = setTextRange(
+                createFor(
+                    /*initializer*/ setEmitFlags(
+                        setTextRange(
+                            createVariableDeclarationList([
+                                setTextRange(createVariableDeclaration(counter, /*type*/ undefined, createLiteral(0)), moveRangePos(node.expression, -1)),
+                                setTextRange(createVariableDeclaration(rhsReference, /*type*/ undefined, expression), node.expression)
+                            ]),
+                            node.expression
+                        ),
+                        EmitFlags.NoHoisting
+                    ),
+                    /*condition*/ setTextRange(
+                        createLessThan(
+                            counter,
+                            createPropertyAccess(rhsReference, "length")
+                        ),
+                        node.expression
+                    ),
+                    /*incrementor*/ setTextRange(createPostfixIncrement(counter), node.expression),
+                    /*statement*/ convertForOfStatementHead(
+                        node,
+                        createElementAccess(rhsReference, counter),
+                        convertedLoopBodyStatements
+                    )
+                ),
+                /*location*/ node
+            );
+
+            // Disable trailing source maps for the OpenParenToken to align source map emit with the old emitter.
+            setEmitFlags(forStatement, EmitFlags.NoTokenTrailingSourceMaps);
+            setTextRange(forStatement, node);
+            return restoreEnclosingLabel(forStatement, outermostLabeledStatement, convertedLoopState && resetLabel);
+        }
+
+        function convertForOfStatementForIterable(node: ForOfStatement, outermostLabeledStatement: LabeledStatement, convertedLoopBodyStatements: Statement[]): Statement {
+            const expression = visitNode(node.expression, visitor, isExpression);
+            const iterator = isIdentifier(expression) ? getGeneratedNameForNode(expression) : createTempVariable(/*recordTempVariable*/ undefined);
+            const result = isIdentifier(expression) ? getGeneratedNameForNode(iterator) : createTempVariable(/*recordTempVariable*/ undefined);
+            const errorRecord = createUniqueName("e");
+            const catchVariable = getGeneratedNameForNode(errorRecord);
+            const returnMethod = createTempVariable(/*recordTempVariable*/ undefined);
+            const values = createValuesHelper(context, expression, node.expression);
+            const next = createCall(createPropertyAccess(iterator, "next" ), /*typeArguments*/ undefined, []);
+
+            hoistVariableDeclaration(errorRecord);
+            hoistVariableDeclaration(returnMethod);
+
+            const forStatement = setEmitFlags(
+                setTextRange(
+                    createFor(
+                        /*initializer*/ setEmitFlags(
+                            setTextRange(
+                                createVariableDeclarationList([
+                                    setTextRange(createVariableDeclaration(iterator, /*type*/ undefined, values), node.expression),
+                                    createVariableDeclaration(result, /*type*/ undefined, next)
+                                ]),
+                                node.expression
+                            ),
+                            EmitFlags.NoHoisting
+                        ),
+                        /*condition*/ createLogicalNot(createPropertyAccess(result, "done")),
+                        /*incrementor*/ createAssignment(result, next),
+                        /*statement*/ convertForOfStatementHead(
+                            node,
+                            createPropertyAccess(result, "value"),
+                            convertedLoopBodyStatements
+                        )
+                    ),
+                    /*location*/ node
+                ),
+                EmitFlags.NoTokenTrailingSourceMaps
+            );
+
+            return createTry(
+                createBlock([
+                    restoreEnclosingLabel(
+                        forStatement,
+                        outermostLabeledStatement,
+                        convertedLoopState && resetLabel
+                    )
+                ]),
+                createCatchClause(createVariableDeclaration(catchVariable),
+                    setEmitFlags(
+                        createBlock([
+                            createStatement(
+                                createAssignment(
+                                    errorRecord,
+                                    createObjectLiteral([
+                                        createPropertyAssignment("error", catchVariable)
+                                    ])
+                                )
+                            )
+                        ]),
+                        EmitFlags.SingleLine
+                    )
+                ),
+                createBlock([
+                    createTry(
+                        /*tryBlock*/ createBlock([
+                            setEmitFlags(
+                                createIf(
+                                    createLogicalAnd(
+                                        createLogicalAnd(
+                                            result,
+                                            createLogicalNot(
+                                                createPropertyAccess(result, "done")
+                                            )
+                                        ),
+                                        createAssignment(
+                                            returnMethod,
+                                            createPropertyAccess(iterator, "return")
+                                        )
+                                    ),
+                                    createStatement(
+                                        createFunctionCall(returnMethod, iterator, [])
+                                    )
+                                ),
+                                EmitFlags.SingleLine
+                            ),
+                        ]),
+                        /*catchClause*/ undefined,
+                        /*finallyBlock*/ setEmitFlags(
+                            createBlock([
+                                setEmitFlags(
+                                    createIf(
+                                        errorRecord,
+                                        createThrow(
+                                            createPropertyAccess(errorRecord, "error")
+                                        )
+                                    ),
+                                    EmitFlags.SingleLine
+                                )
+                            ]),
+                            EmitFlags.SingleLine
+                        )
+                    )
+                ])
+            );
+        }
+
+        /**
+         * Visits an ObjectLiteralExpression with computed propety names.
+         *
+         * @param node An ObjectLiteralExpression node.
+         */
+        function visitObjectLiteralExpression(node: ObjectLiteralExpression): Expression {
+            // We are here because a ComputedPropertyName was used somewhere in the expression.
+            const properties = node.properties;
+            const numProperties = properties.length;
+
+            // Find the first computed property.
+            // Everything until that point can be emitted as part of the initial object literal.
+            let numInitialProperties = numProperties;
+            let numInitialPropertiesWithoutYield = numProperties;
+            for (let i = 0; i < numProperties; i++) {
+                const property = properties[i];
+                if ((property.transformFlags & TransformFlags.ContainsYield && hierarchyFacts & HierarchyFacts.AsyncFunctionBody)
+                    && i < numInitialPropertiesWithoutYield) {
+                    numInitialPropertiesWithoutYield = i;
+                }
+                if (property.name.kind === SyntaxKind.ComputedPropertyName) {
+                    numInitialProperties = i;
+                    break;
+                }
+            }
+
+            if (numInitialProperties !== numProperties) {
+                if (numInitialPropertiesWithoutYield < numInitialProperties) {
+                    numInitialProperties = numInitialPropertiesWithoutYield;
+                }
+
+                // For computed properties, we need to create a unique handle to the object
+                // literal so we can modify it without risking internal assignments tainting the object.
+                const temp = createTempVariable(hoistVariableDeclaration);
+
+                // Write out the first non-computed properties, then emit the rest through indexing on the temp variable.
+                const expressions: Expression[] = [];
+                const assignment = createAssignment(
+                    temp,
+                    setEmitFlags(
+                        createObjectLiteral(
+                            visitNodes(properties, visitor, isObjectLiteralElementLike, 0, numInitialProperties),
+                            node.multiLine
+                        ),
+                        EmitFlags.Indented
+                    )
+                );
+
+                if (node.multiLine) {
+                    assignment.startsOnNewLine = true;
+                }
+
+                expressions.push(assignment);
+
+                addObjectLiteralMembers(expressions, node, temp, numInitialProperties);
+
+                // We need to clone the temporary identifier so that we can write it on a
+                // new line
+                expressions.push(node.multiLine ? startOnNewLine(getMutableClone(temp)) : temp);
+                return inlineExpressions(expressions);
+            }
+            return visitEachChild(node, visitor, context);
+        }
+
+        function shouldConvertIterationStatementBody(node: IterationStatement): boolean {
+            return (resolver.getNodeCheckFlags(node) & NodeCheckFlags.LoopWithCapturedBlockScopedBinding) !== 0;
+        }
+
+        /**
+         * Records constituents of name for the given variable to be hoisted in the outer scope.
+         */
+        function hoistVariableDeclarationDeclaredInConvertedLoop(state: ConvertedLoopState, node: VariableDeclaration): void {
+            if (!state.hoistedLocalVariables) {
+                state.hoistedLocalVariables = [];
+            }
+
+            visit(node.name);
+
+            function visit(node: Identifier | BindingPattern) {
+                if (node.kind === SyntaxKind.Identifier) {
+                    state.hoistedLocalVariables.push((<Identifier>node));
+                }
+                else {
+                    for (const element of (<BindingPattern>node).elements) {
+                        if (!isOmittedExpression(element)) {
+                            visit(element.name);
+                        }
+                    }
+                }
+            }
+        }
+
+        function convertIterationStatementBodyIfNecessary(node: IterationStatement, outermostLabeledStatement: LabeledStatement, convert?: LoopConverter): VisitResult<Statement> {
+            if (!shouldConvertIterationStatementBody(node)) {
+                let saveAllowedNonLabeledJumps: Jump;
+                if (convertedLoopState) {
+                    // we get here if we are trying to emit normal loop loop inside converted loop
+                    // set allowedNonLabeledJumps to Break | Continue to mark that break\continue inside the loop should be emitted as is
+                    saveAllowedNonLabeledJumps = convertedLoopState.allowedNonLabeledJumps;
+                    convertedLoopState.allowedNonLabeledJumps = Jump.Break | Jump.Continue;
+                }
+
+                const result = convert
+                    ? convert(node, outermostLabeledStatement, /*convertedLoopBodyStatements*/ undefined)
+                    : restoreEnclosingLabel(visitEachChild(node, visitor, context), outermostLabeledStatement, convertedLoopState && resetLabel);
+
+                if (convertedLoopState) {
+                    convertedLoopState.allowedNonLabeledJumps = saveAllowedNonLabeledJumps;
+                }
+                return result;
+            }
+
+            const functionName = createUniqueName("_loop");
+            let loopInitializer: VariableDeclarationList;
+            switch (node.kind) {
+                case SyntaxKind.ForStatement:
+                case SyntaxKind.ForInStatement:
+                case SyntaxKind.ForOfStatement:
+                    const initializer = (<ForStatement | ForInStatement | ForOfStatement>node).initializer;
+                    if (initializer && initializer.kind === SyntaxKind.VariableDeclarationList) {
+                        loopInitializer = <VariableDeclarationList>initializer;
+                    }
+                    break;
+            }
+            // variables that will be passed to the loop as parameters
+            const loopParameters: ParameterDeclaration[] = [];
+            // variables declared in the loop initializer that will be changed inside the loop
+            const loopOutParameters: LoopOutParameter[] = [];
+            if (loopInitializer && (getCombinedNodeFlags(loopInitializer) & NodeFlags.BlockScoped)) {
+                for (const decl of loopInitializer.declarations) {
+                    processLoopVariableDeclaration(decl, loopParameters, loopOutParameters);
+                }
+            }
+
+            const outerConvertedLoopState = convertedLoopState;
+            convertedLoopState = { loopOutParameters };
+            if (outerConvertedLoopState) {
+                // convertedOuterLoopState !== undefined means that this converted loop is nested in another converted loop.
+                // if outer converted loop has already accumulated some state - pass it through
+                if (outerConvertedLoopState.argumentsName) {
+                    // outer loop has already used 'arguments' so we've already have some name to alias it
+                    // use the same name in all nested loops
+                    convertedLoopState.argumentsName = outerConvertedLoopState.argumentsName;
+                }
+                if (outerConvertedLoopState.thisName) {
+                    // outer loop has already used 'this' so we've already have some name to alias it
+                    // use the same name in all nested loops
+                    convertedLoopState.thisName = outerConvertedLoopState.thisName;
+                }
+                if (outerConvertedLoopState.hoistedLocalVariables) {
+                    // we've already collected some non-block scoped variable declarations in enclosing loop
+                    // use the same storage in nested loop
+                    convertedLoopState.hoistedLocalVariables = outerConvertedLoopState.hoistedLocalVariables;
+                }
+            }
+
+            startLexicalEnvironment();
+            let loopBody = visitNode(node.statement, visitor, isStatement, liftToBlock);
+            const lexicalEnvironment = endLexicalEnvironment();
+
+            const currentState = convertedLoopState;
+            convertedLoopState = outerConvertedLoopState;
+
+            if (loopOutParameters.length || lexicalEnvironment) {
+                const statements = isBlock(loopBody) ? (<Block>loopBody).statements.slice() : [loopBody];
+                if (loopOutParameters.length) {
+                    copyOutParameters(loopOutParameters, CopyDirection.ToOutParameter, statements);
+                }
+                addRange(statements, lexicalEnvironment);
+                loopBody = createBlock(statements, /*multiline*/ true);
+            }
+
+            if (isBlock(loopBody)) {
+                loopBody.multiLine = true;
+            }
+            else {
+                loopBody = createBlock([loopBody], /*multiline*/ true);
+            }
+
+            const containsYield = (node.statement.transformFlags & TransformFlags.ContainsYield) !== 0;
+            const isAsyncBlockContainingAwait = containsYield && (hierarchyFacts & HierarchyFacts.AsyncFunctionBody) !== 0;
+
+            let loopBodyFlags: EmitFlags = 0;
+            if (currentState.containsLexicalThis) {
+                loopBodyFlags |= EmitFlags.CapturesThis;
+            }
+
+            if (isAsyncBlockContainingAwait) {
+                loopBodyFlags |= EmitFlags.AsyncFunctionBody;
+            }
+
+            const convertedLoopVariable =
+                createVariableStatement(
+                    /*modifiers*/ undefined,
+                    setEmitFlags(
+                        createVariableDeclarationList(
+                            [
+                                createVariableDeclaration(
+                                    functionName,
+                                    /*type*/ undefined,
+                                    setEmitFlags(
+                                        createFunctionExpression(
+                                            /*modifiers*/ undefined,
+                                            containsYield ? createToken(SyntaxKind.AsteriskToken) : undefined,
+                                            /*name*/ undefined,
+                                            /*typeParameters*/ undefined,
+                                            loopParameters,
+                                            /*type*/ undefined,
+                                            <Block>loopBody
+                                        ),
+                                        loopBodyFlags
+                                    )
+                                )
+                            ]
+                        ),
+                        EmitFlags.NoHoisting
+                    )
+                );
+
+            const statements: Statement[] = [convertedLoopVariable];
+
+            let extraVariableDeclarations: VariableDeclaration[];
+            // propagate state from the inner loop to the outer loop if necessary
+            if (currentState.argumentsName) {
+                // if alias for arguments is set
+                if (outerConvertedLoopState) {
+                    // pass it to outer converted loop
+                    outerConvertedLoopState.argumentsName = currentState.argumentsName;
+                }
+                else {
+                    // this is top level converted loop and we need to create an alias for 'arguments' object
+                    (extraVariableDeclarations || (extraVariableDeclarations = [])).push(
+                        createVariableDeclaration(
+                            currentState.argumentsName,
+                            /*type*/ undefined,
+                            createIdentifier("arguments")
+                        )
+                    );
+                }
+            }
+
+            if (currentState.thisName) {
+                // if alias for this is set
+                if (outerConvertedLoopState) {
+                    // pass it to outer converted loop
+                    outerConvertedLoopState.thisName = currentState.thisName;
+                }
+                else {
+                    // this is top level converted loop so we need to create an alias for 'this' here
+                    // NOTE:
+                    // if converted loops were all nested in arrow function then we'll always emit '_this' so convertedLoopState.thisName will not be set.
+                    // If it is set this means that all nested loops are not nested in arrow function and it is safe to capture 'this'.
+                    (extraVariableDeclarations || (extraVariableDeclarations = [])).push(
+                        createVariableDeclaration(
+                            currentState.thisName,
+                            /*type*/ undefined,
+                            createIdentifier("this")
+                        )
+                    );
+                }
+            }
+
+            if (currentState.hoistedLocalVariables) {
+                // if hoistedLocalVariables !== undefined this means that we've possibly collected some variable declarations to be hoisted later
+                if (outerConvertedLoopState) {
+                    // pass them to outer converted loop
+                    outerConvertedLoopState.hoistedLocalVariables = currentState.hoistedLocalVariables;
+                }
+                else {
+                    if (!extraVariableDeclarations) {
+                        extraVariableDeclarations = [];
+                    }
+                    // hoist collected variable declarations
+                    for (const identifier of currentState.hoistedLocalVariables) {
+                        extraVariableDeclarations.push(createVariableDeclaration(identifier));
+                    }
+                }
+            }
+
+            // add extra variables to hold out parameters if necessary
+            if (loopOutParameters.length) {
+                if (!extraVariableDeclarations) {
+                    extraVariableDeclarations = [];
+                }
+                for (const outParam of loopOutParameters) {
+                    extraVariableDeclarations.push(createVariableDeclaration(outParam.outParamName));
+                }
+            }
+
+            // create variable statement to hold all introduced variable declarations
+            if (extraVariableDeclarations) {
+                statements.push(createVariableStatement(
+                    /*modifiers*/ undefined,
+                    createVariableDeclarationList(extraVariableDeclarations)
+                ));
+            }
+
+            const convertedLoopBodyStatements = generateCallToConvertedLoop(functionName, loopParameters, currentState, containsYield);
+
+            let loop: Statement;
+            if (convert) {
+                loop = convert(node, outermostLabeledStatement, convertedLoopBodyStatements);
+            }
+            else {
+                let clone = <IterationStatement>getMutableClone(node);
+                // clean statement part
+                clone.statement = undefined;
+                // visit childnodes to transform initializer/condition/incrementor parts
+                clone = visitEachChild(clone, visitor, context);
+                // set loop statement
+                clone.statement = createBlock(convertedLoopBodyStatements, /*multiline*/ true);
+                // reset and re-aggregate the transform flags
+                clone.transformFlags = 0;
+                aggregateTransformFlags(clone);
+                loop = restoreEnclosingLabel(clone, outermostLabeledStatement, convertedLoopState && resetLabel);
+            }
+
+            statements.push(loop);
+            return statements;
+        }
+
+        function copyOutParameter(outParam: LoopOutParameter, copyDirection: CopyDirection): BinaryExpression {
+            const source = copyDirection === CopyDirection.ToOriginal ? outParam.outParamName : outParam.originalName;
+            const target = copyDirection === CopyDirection.ToOriginal ? outParam.originalName : outParam.outParamName;
+            return createBinary(target, SyntaxKind.EqualsToken, source);
+        }
+
+        function copyOutParameters(outParams: LoopOutParameter[], copyDirection: CopyDirection, statements: Statement[]): void {
+            for (const outParam of outParams) {
+                statements.push(createStatement(copyOutParameter(outParam, copyDirection)));
+            }
+        }
+
+        function generateCallToConvertedLoop(loopFunctionExpressionName: Identifier, parameters: ParameterDeclaration[], state: ConvertedLoopState, isAsyncBlockContainingAwait: boolean): Statement[] {
+            const outerConvertedLoopState = convertedLoopState;
+
+            const statements: Statement[] = [];
+            // loop is considered simple if it does not have any return statements or break\continue that transfer control outside of the loop
+            // simple loops are emitted as just 'loop()';
+            // NOTE: if loop uses only 'continue' it still will be emitted as simple loop
+            const isSimpleLoop =
+                !(state.nonLocalJumps & ~Jump.Continue) &&
+                !state.labeledNonLocalBreaks &&
+                !state.labeledNonLocalContinues;
+
+            const call = createCall(loopFunctionExpressionName, /*typeArguments*/ undefined, map(parameters, p => <Identifier>p.name));
+            const callResult = isAsyncBlockContainingAwait
+                ? createYield(
+                    createToken(SyntaxKind.AsteriskToken),
+                    setEmitFlags(call, EmitFlags.Iterator)
+                )
+                : call;
+            if (isSimpleLoop) {
+                statements.push(createStatement(callResult));
+                copyOutParameters(state.loopOutParameters, CopyDirection.ToOriginal, statements);
+            }
+            else {
+                const loopResultName = createUniqueName("state");
+                const stateVariable = createVariableStatement(
+                    /*modifiers*/ undefined,
+                    createVariableDeclarationList(
+                        [createVariableDeclaration(loopResultName, /*type*/ undefined, callResult)]
+                    )
+                );
+                statements.push(stateVariable);
+                copyOutParameters(state.loopOutParameters, CopyDirection.ToOriginal, statements);
+
+                if (state.nonLocalJumps & Jump.Return) {
+                    let returnStatement: ReturnStatement;
+                    if (outerConvertedLoopState) {
+                        outerConvertedLoopState.nonLocalJumps |= Jump.Return;
+                        returnStatement = createReturn(loopResultName);
+                    }
+                    else {
+                        returnStatement = createReturn(createPropertyAccess(loopResultName, "value"));
+                    }
+                    statements.push(
+                        createIf(
+                            createBinary(
+                                createTypeOf(loopResultName),
+                                SyntaxKind.EqualsEqualsEqualsToken,
+                                createLiteral("object")
+                            ),
+                            returnStatement
+                        )
+                    );
+                }
+
+                if (state.nonLocalJumps & Jump.Break) {
+                    statements.push(
+                        createIf(
+                            createBinary(
+                                loopResultName,
+                                SyntaxKind.EqualsEqualsEqualsToken,
+                                createLiteral("break")
+                            ),
+                            createBreak()
+                        )
+                    );
+                }
+
+                if (state.labeledNonLocalBreaks || state.labeledNonLocalContinues) {
+                    const caseClauses: CaseClause[] = [];
+                    processLabeledJumps(state.labeledNonLocalBreaks, /*isBreak*/ true, loopResultName, outerConvertedLoopState, caseClauses);
+                    processLabeledJumps(state.labeledNonLocalContinues, /*isBreak*/ false, loopResultName, outerConvertedLoopState, caseClauses);
+                    statements.push(
+                        createSwitch(
+                            loopResultName,
+                            createCaseBlock(caseClauses)
+                        )
+                    );
+                }
+            }
+            return statements;
+        }
+
+        function setLabeledJump(state: ConvertedLoopState, isBreak: boolean, labelText: string, labelMarker: string): void {
+            if (isBreak) {
+                if (!state.labeledNonLocalBreaks) {
+                    state.labeledNonLocalBreaks = createMap<string>();
+                }
+                state.labeledNonLocalBreaks.set(labelText, labelMarker);
+            }
+            else {
+                if (!state.labeledNonLocalContinues) {
+                    state.labeledNonLocalContinues = createMap<string>();
+                }
+                state.labeledNonLocalContinues.set(labelText, labelMarker);
+            }
+        }
+
+        function processLabeledJumps(table: Map<string>, isBreak: boolean, loopResultName: Identifier, outerLoop: ConvertedLoopState, caseClauses: CaseClause[]): void {
+            if (!table) {
+                return;
+            }
+            table.forEach((labelMarker, labelText) => {
+                const statements: Statement[] = [];
+                // if there are no outer converted loop or outer label in question is located inside outer converted loop
+                // then emit labeled break\continue
+                // otherwise propagate pair 'label -> marker' to outer converted loop and emit 'return labelMarker' so outer loop can later decide what to do
+                if (!outerLoop || (outerLoop.labels && outerLoop.labels.get(labelText))) {
+                    const label = createIdentifier(labelText);
+                    statements.push(isBreak ? createBreak(label) : createContinue(label));
+                }
+                else {
+                    setLabeledJump(outerLoop, isBreak, labelText, labelMarker);
+                    statements.push(createReturn(loopResultName));
+                }
+                caseClauses.push(createCaseClause(createLiteral(labelMarker), statements));
+            });
+        }
+
+        function processLoopVariableDeclaration(decl: VariableDeclaration | BindingElement, loopParameters: ParameterDeclaration[], loopOutParameters: LoopOutParameter[]) {
+            const name = decl.name;
+            if (isBindingPattern(name)) {
+                for (const element of name.elements) {
+                    if (!isOmittedExpression(element)) {
+                        processLoopVariableDeclaration(element, loopParameters, loopOutParameters);
+                    }
+                }
+            }
+            else {
+                loopParameters.push(createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, name));
+                if (resolver.getNodeCheckFlags(decl) & NodeCheckFlags.NeedsLoopOutParameter) {
+                    const outParamName = createUniqueName("out_" + unescapeIdentifier(name.text));
+                    loopOutParameters.push({ originalName: name, outParamName });
+                }
+            }
+        }
+
+        /**
+         * Adds the members of an object literal to an array of expressions.
+         *
+         * @param expressions An array of expressions.
+         * @param node An ObjectLiteralExpression node.
+         * @param receiver The receiver for members of the ObjectLiteralExpression.
+         * @param numInitialNonComputedProperties The number of initial properties without
+         *                                        computed property names.
+         */
+        function addObjectLiteralMembers(expressions: Expression[], node: ObjectLiteralExpression, receiver: Identifier, start: number) {
+            const properties = node.properties;
+            const numProperties = properties.length;
+            for (let i = start; i < numProperties; i++) {
+                const property = properties[i];
+                switch (property.kind) {
+                    case SyntaxKind.GetAccessor:
+                    case SyntaxKind.SetAccessor:
+                        const accessors = getAllAccessorDeclarations(node.properties, <AccessorDeclaration>property);
+                        if (property === accessors.firstAccessor) {
+                            expressions.push(transformAccessorsToExpression(receiver, accessors, node, node.multiLine));
+                        }
+
+                        break;
+
+                    case SyntaxKind.MethodDeclaration:
+                        expressions.push(transformObjectLiteralMethodDeclarationToExpression(<MethodDeclaration>property, receiver, node, node.multiLine));
+                        break;
+
+                    case SyntaxKind.PropertyAssignment:
+                        expressions.push(transformPropertyAssignmentToExpression(<PropertyAssignment>property, receiver, node.multiLine));
+                        break;
+
+                    case SyntaxKind.ShorthandPropertyAssignment:
+                        expressions.push(transformShorthandPropertyAssignmentToExpression(<ShorthandPropertyAssignment>property, receiver, node.multiLine));
+                        break;
+
+                    default:
+                        Debug.failBadSyntaxKind(node);
+                        break;
+                }
+            }
+        }
+
+        /**
+         * Transforms a PropertyAssignment node into an expression.
+         *
+         * @param node The ObjectLiteralExpression that contains the PropertyAssignment.
+         * @param property The PropertyAssignment node.
+         * @param receiver The receiver for the assignment.
+         */
+        function transformPropertyAssignmentToExpression(property: PropertyAssignment, receiver: Expression, startsOnNewLine: boolean) {
+            const expression = createAssignment(
+                createMemberAccessForPropertyName(
+                    receiver,
+                    visitNode(property.name, visitor, isPropertyName)
+                ),
+                visitNode(property.initializer, visitor, isExpression)
+            );
+            setTextRange(expression, property);
+            if (startsOnNewLine) {
+                expression.startsOnNewLine = true;
+            }
+            return expression;
+        }
+
+        /**
+         * Transforms a ShorthandPropertyAssignment node into an expression.
+         *
+         * @param node The ObjectLiteralExpression that contains the ShorthandPropertyAssignment.
+         * @param property The ShorthandPropertyAssignment node.
+         * @param receiver The receiver for the assignment.
+         */
+        function transformShorthandPropertyAssignmentToExpression(property: ShorthandPropertyAssignment, receiver: Expression, startsOnNewLine: boolean) {
+            const expression = createAssignment(
+                createMemberAccessForPropertyName(
+                    receiver,
+                    visitNode(property.name, visitor, isPropertyName)
+                ),
+                getSynthesizedClone(property.name)
+            );
+            setTextRange(expression, property);
+            if (startsOnNewLine) {
+                expression.startsOnNewLine = true;
+            }
+            return expression;
+        }
+
+        /**
+         * Transforms a MethodDeclaration of an ObjectLiteralExpression into an expression.
+         *
+         * @param node The ObjectLiteralExpression that contains the MethodDeclaration.
+         * @param method The MethodDeclaration node.
+         * @param receiver The receiver for the assignment.
+         */
+        function transformObjectLiteralMethodDeclarationToExpression(method: MethodDeclaration, receiver: Expression, container: Node, startsOnNewLine: boolean) {
+            const ancestorFacts = enterSubtree(HierarchyFacts.None, HierarchyFacts.None);
+            const expression = createAssignment(
+                createMemberAccessForPropertyName(
+                    receiver,
+                    visitNode(method.name, visitor, isPropertyName)
+                ),
+                transformFunctionLikeToExpression(method, /*location*/ method, /*name*/ undefined, container)
+            );
+            setTextRange(expression, method);
+            if (startsOnNewLine) {
+                expression.startsOnNewLine = true;
+            }
+            exitSubtree(ancestorFacts, HierarchyFacts.PropagateNewTargetMask, hierarchyFacts & HierarchyFacts.PropagateNewTargetMask ? HierarchyFacts.NewTarget : HierarchyFacts.None);
+            return expression;
+        }
+
+        function visitCatchClause(node: CatchClause): CatchClause {
+            const ancestorFacts = enterSubtree(HierarchyFacts.BlockScopeExcludes, HierarchyFacts.BlockScopeIncludes);
+            let updated: CatchClause;
+            if (isBindingPattern(node.variableDeclaration.name)) {
+                const temp = createTempVariable(/*recordTempVariable*/ undefined);
+                const newVariableDeclaration = createVariableDeclaration(temp);
+                setTextRange(newVariableDeclaration, node.variableDeclaration);
+                const vars = flattenDestructuringBinding(
+                    node.variableDeclaration,
+                    visitor,
+                    context,
+                    FlattenLevel.All,
+                    temp
+                );
+                const list = createVariableDeclarationList(vars);
+                setTextRange(list, node.variableDeclaration);
+                const destructure = createVariableStatement(/*modifiers*/ undefined, list);
+                updated = updateCatchClause(node, newVariableDeclaration, addStatementToStartOfBlock(node.block, destructure));
+            }
+            else {
+                updated = visitEachChild(node, visitor, context);
+            }
+
+            exitSubtree(ancestorFacts, HierarchyFacts.None, HierarchyFacts.None);
+            return updated;
+        }
+
+        function addStatementToStartOfBlock(block: Block, statement: Statement): Block {
+            const transformedStatements = visitNodes(block.statements, visitor, isStatement);
+            return updateBlock(block, [statement].concat(transformedStatements));
+        }
+
+        /**
+         * Visits a MethodDeclaration of an ObjectLiteralExpression and transforms it into a
+         * PropertyAssignment.
+         *
+         * @param node A MethodDeclaration node.
+         */
+        function visitMethodDeclaration(node: MethodDeclaration): ObjectLiteralElementLike {
+            // We should only get here for methods on an object literal with regular identifier names.
+            // Methods on classes are handled in visitClassDeclaration/visitClassExpression.
+            // Methods with computed property names are handled in visitObjectLiteralExpression.
+            Debug.assert(!isComputedPropertyName(node.name));
+            const functionExpression = transformFunctionLikeToExpression(node, /*location*/ moveRangePos(node, -1), /*name*/ undefined, /*container*/ undefined);
+            setEmitFlags(functionExpression, EmitFlags.NoLeadingComments | getEmitFlags(functionExpression));
+            return setTextRange(
+                createPropertyAssignment(
+                    node.name,
+                    functionExpression
+                ),
+                /*location*/ node
+            );
+        }
+
+        /**
+         * Visits an AccessorDeclaration of an ObjectLiteralExpression.
+         *
+         * @param node An AccessorDeclaration node.
+         */
+        function visitAccessorDeclaration(node: AccessorDeclaration): AccessorDeclaration {
+            Debug.assert(!isComputedPropertyName(node.name));
+            const savedConvertedLoopState = convertedLoopState;
+            convertedLoopState = undefined;
+            const ancestorFacts = enterSubtree(HierarchyFacts.FunctionExcludes, HierarchyFacts.FunctionIncludes);
+            let updated: AccessorDeclaration;
+            if (node.transformFlags & TransformFlags.ContainsCapturedLexicalThis) {
+                const parameters = visitParameterList(node.parameters, visitor, context);
+                const body = transformFunctionBody(node);
+                if (node.kind === SyntaxKind.GetAccessor) {
+                    updated = updateGetAccessor(node, node.decorators, node.modifiers, node.name, parameters, node.type, body);
+                }
+                else {
+                    updated = updateSetAccessor(node, node.decorators, node.modifiers, node.name, parameters, body);
+                }
+            }
+            else {
+                updated = visitEachChild(node, visitor, context);
+            }
+            exitSubtree(ancestorFacts, HierarchyFacts.PropagateNewTargetMask, HierarchyFacts.None);
+            convertedLoopState = savedConvertedLoopState;
+            return updated;
+        }
+
+        /**
+         * Visits a ShorthandPropertyAssignment and transforms it into a PropertyAssignment.
+         *
+         * @param node A ShorthandPropertyAssignment node.
+         */
+        function visitShorthandPropertyAssignment(node: ShorthandPropertyAssignment): ObjectLiteralElementLike {
+            return setTextRange(
+                createPropertyAssignment(
+                    node.name,
+                    getSynthesizedClone(node.name)
+                ),
+                /*location*/ node
+            );
+        }
+
+        function visitComputedPropertyName(node: ComputedPropertyName) {
+            const ancestorFacts = enterSubtree(HierarchyFacts.ComputedPropertyNameExcludes, HierarchyFacts.ComputedPropertyNameIncludes);
+            const updated = visitEachChild(node, visitor, context);
+            exitSubtree(ancestorFacts, HierarchyFacts.PropagateNewTargetMask, hierarchyFacts & HierarchyFacts.PropagateNewTargetMask ? HierarchyFacts.NewTargetInComputedPropertyName : HierarchyFacts.None);
+            return updated;
+        }
+
+        /**
+         * Visits a YieldExpression node.
+         *
+         * @param node A YieldExpression node.
+         */
+        function visitYieldExpression(node: YieldExpression): Expression {
+            // `yield` expressions are transformed using the generators transformer.
+            return visitEachChild(node, visitor, context);
+        }
+
+        /**
+         * Visits an ArrayLiteralExpression that contains a spread element.
+         *
+         * @param node An ArrayLiteralExpression node.
+         */
+        function visitArrayLiteralExpression(node: ArrayLiteralExpression): Expression {
+            if (node.transformFlags & TransformFlags.ES2015) {
+                // We are here because we contain a SpreadElementExpression.
+                return transformAndSpreadElements(node.elements, /*needsUniqueCopy*/ true, node.multiLine, /*hasTrailingComma*/ node.elements.hasTrailingComma);
+            }
+            return visitEachChild(node, visitor, context);
+        }
+
+        /**
+         * Visits a CallExpression that contains either a spread element or `super`.
+         *
+         * @param node a CallExpression.
+         */
+        function visitCallExpression(node: CallExpression) {
+            if (isTypeScriptClassWrapper(node)) {
+                return visitTypeScriptClassWrapper(node);
+            }
+
+            if (node.transformFlags & TransformFlags.ES2015) {
+                return visitCallExpressionWithPotentialCapturedThisAssignment(node, /*assignToCapturedThis*/ true);
+            }
+            return updateCall(
+                node,
+                visitNode(node.expression, callExpressionVisitor, isExpression),
+                /*typeArguments*/ undefined,
+                visitNodes(node.arguments, visitor, isExpression)
+            );
+        }
+
+        function visitTypeScriptClassWrapper(node: CallExpression) {
+            // This is a call to a class wrapper function (an IIFE) created by the 'ts' transformer.
+            // The wrapper has a form similar to:
+            //
+            //  (function() {
+            //      class C { // 1
+            //      }
+            //      C.x = 1; // 2
+            //      return C;
+            //  }())
+            //
+            // When we transform the class, we end up with something like this:
+            //
+            //  (function () {
+            //      var C = (function () { // 3
+            //          function C() {
+            //          }
+            //          return C; // 4
+            //      }());
+            //      C.x = 1;
+            //      return C;
+            //  }())
+            //
+            // We want to simplify the two nested IIFEs to end up with something like this:
+            //
+            //  (function () {
+            //      function C() {
+            //      }
+            //      C.x = 1;
+            //      return C;
+            //  }())
+
+            // We skip any outer expressions in a number of places to get to the innermost
+            // expression, but we will restore them later to preserve comments and source maps.
+            const body = cast(skipOuterExpressions(node.expression), isFunctionExpression).body;
+
+            // The class statements are the statements generated by visiting the first statement of the
+            // body (1), while all other statements are added to remainingStatements (2)
+            const classStatements = visitNodes(body.statements, visitor, isStatement, 0, 1);
+            const remainingStatements = visitNodes(body.statements, visitor, isStatement, 1, body.statements.length - 1);
+            const varStatement = cast(firstOrUndefined(classStatements), isVariableStatement);
+
+            // We know there is only one variable declaration here as we verified this in an
+            // earlier call to isTypeScriptClassWrapper
+            const variable = varStatement.declarationList.declarations[0];
+            const initializer = skipOuterExpressions(variable.initializer);
+
+            // Under certain conditions, the 'ts' transformer may introduce a class alias, which
+            // we see as an assignment, for example:
+            //
+            //  (function () {
+            //      var C = C_1 = (function () {
+            //          function C() {
+            //          }
+            //          C.x = function () { return C_1; }
+            //          return C;
+            //      }());
+            //      C = C_1 = __decorate([dec], C);
+            //      return C;
+            //      var C_1;
+            //  }())
+            //
+            const aliasAssignment = tryCast(initializer, isAssignmentExpression);
+
+            // The underlying call (3) is another IIFE that may contain a '_super' argument.
+            const call = cast(aliasAssignment ? skipOuterExpressions(aliasAssignment.right) : initializer, isCallExpression);
+            const func = cast(skipOuterExpressions(call.expression), isFunctionExpression);
+
+            const funcStatements = func.body.statements;
+            let classBodyStart = 0;
+            let classBodyEnd = -1;
+
+            const statements: Statement[] = [];
+            if (aliasAssignment) {
+                // If we have a class alias assignment, we need to move it to the down-level constructor
+                // function we generated for the class.
+                const extendsCall = tryCast(funcStatements[classBodyStart], isExpressionStatement);
+                if (extendsCall) {
+                    statements.push(extendsCall);
+                    classBodyStart++;
+                }
+
+                // The next statement is the function declaration.
+                statements.push(funcStatements[classBodyStart]);
+                classBodyStart++;
+
+                // Add the class alias following the declaration.
+                statements.push(
+                    createStatement(
+                        createAssignment(
+                            aliasAssignment.left,
+                            cast(variable.name, isIdentifier)
+                        )
+                    )
+                );
+            }
+
+            // Find the trailing 'return' statement (4)
+            while (!isReturnStatement(elementAt(funcStatements, classBodyEnd))) {
+                classBodyEnd--;
+            }
+
+            // When we extract the statements of the inner IIFE, we exclude the 'return' statement (4)
+            // as we already have one that has been introduced by the 'ts' transformer.
+            addRange(statements, funcStatements, classBodyStart, classBodyEnd);
+
+            if (classBodyEnd < -1) {
+                // If there were any hoisted declarations following the return statement, we should
+                // append them.
+                addRange(statements, funcStatements, classBodyEnd + 1);
+            }
+
+            // Add the remaining statements of the outer wrapper.
+            addRange(statements, remainingStatements);
+
+            // The 'es2015' class transform may add an end-of-declaration marker. If so we will add it
+            // after the remaining statements from the 'ts' transformer.
+            addRange(statements, classStatements, /*start*/ 1);
+
+            // Recreate any outer parentheses or partially-emitted expressions to preserve source map
+            // and comment locations.
+            return recreateOuterExpressions(node.expression,
+                recreateOuterExpressions(variable.initializer,
+                    recreateOuterExpressions(aliasAssignment && aliasAssignment.right,
+                        updateCall(call,
+                            recreateOuterExpressions(call.expression,
+                                updateFunctionExpression(
+                                    func,
+                                    /*modifiers*/ undefined,
+                                    /*asteriskToken*/ undefined,
+                                    /*name*/ undefined,
+                                    /*typeParameters*/ undefined,
+                                    func.parameters,
+                                    /*type*/ undefined,
+                                    updateBlock(
+                                        func.body,
+                                        statements
+                                    )
+                                )
+                            ),
+                            /*typeArguments*/ undefined,
+                            call.arguments
+                        )
+                    )
+                )
+            );
+        }
+
+        function visitImmediateSuperCallInBody(node: CallExpression) {
+            return visitCallExpressionWithPotentialCapturedThisAssignment(node, /*assignToCapturedThis*/ false);
+        }
+
+        function visitCallExpressionWithPotentialCapturedThisAssignment(node: CallExpression, assignToCapturedThis: boolean): CallExpression | BinaryExpression {
+            // We are here either because SuperKeyword was used somewhere in the expression, or
+            // because we contain a SpreadElementExpression.
+
+            const { target, thisArg } = createCallBinding(node.expression, hoistVariableDeclaration);
+            if (node.expression.kind === SyntaxKind.SuperKeyword) {
+                setEmitFlags(thisArg, EmitFlags.NoSubstitution);
+            }
+            let resultingCall: CallExpression | BinaryExpression;
+            if (node.transformFlags & TransformFlags.ContainsSpread) {
+                // [source]
+                //      f(...a, b)
+                //      x.m(...a, b)
+                //      super(...a, b)
+                //      super.m(...a, b) // in static
+                //      super.m(...a, b) // in instance
+                //
+                // [output]
+                //      f.apply(void 0, a.concat([b]))
+                //      (_a = x).m.apply(_a, a.concat([b]))
+                //      _super.apply(this, a.concat([b]))
+                //      _super.m.apply(this, a.concat([b]))
+                //      _super.prototype.m.apply(this, a.concat([b]))
+
+                resultingCall = createFunctionApply(
+                    visitNode(target, callExpressionVisitor, isExpression),
+                    visitNode(thisArg, visitor, isExpression),
+                    transformAndSpreadElements(node.arguments, /*needsUniqueCopy*/ false, /*multiLine*/ false, /*hasTrailingComma*/ false)
+                );
+            }
+            else {
+                // [source]
+                //      super(a)
+                //      super.m(a) // in static
+                //      super.m(a) // in instance
+                //
+                // [output]
+                //      _super.call(this, a)
+                //      _super.m.call(this, a)
+                //      _super.prototype.m.call(this, a)
+                resultingCall = createFunctionCall(
+                    visitNode(target, callExpressionVisitor, isExpression),
+                    visitNode(thisArg, visitor, isExpression),
+                    visitNodes(node.arguments, visitor, isExpression),
+                    /*location*/ node
+                );
+            }
+
+            if (node.expression.kind === SyntaxKind.SuperKeyword) {
+                const actualThis = createThis();
+                setEmitFlags(actualThis, EmitFlags.NoSubstitution);
+                const initializer =
+                    createLogicalOr(
+                        resultingCall,
+                        actualThis
+                    );
+                resultingCall = assignToCapturedThis
+                    ? createAssignment(createIdentifier("_this"), initializer)
+                    : initializer;
+            }
+            return setOriginalNode(resultingCall, node);
+        }
+
+        /**
+         * Visits a NewExpression that contains a spread element.
+         *
+         * @param node A NewExpression node.
+         */
+        function visitNewExpression(node: NewExpression): LeftHandSideExpression {
+            if (node.transformFlags & TransformFlags.ContainsSpread) {
+                // We are here because we contain a SpreadElementExpression.
+                // [source]
+                //      new C(...a)
+                //
+                // [output]
+                //      new ((_a = C).bind.apply(_a, [void 0].concat(a)))()
+
+                const { target, thisArg } = createCallBinding(createPropertyAccess(node.expression, "bind"), hoistVariableDeclaration);
+                return createNew(
+                    createFunctionApply(
+                        visitNode(target, visitor, isExpression),
+                        thisArg,
+                        transformAndSpreadElements(createNodeArray([createVoidZero(), ...node.arguments]), /*needsUniqueCopy*/ false, /*multiLine*/ false, /*hasTrailingComma*/ false)
+                    ),
+                    /*typeArguments*/ undefined,
+                    []
+                );
+            }
+            return visitEachChild(node, visitor, context);
+        }
+
+        /**
+         * Transforms an array of Expression nodes that contains a SpreadExpression.
+         *
+         * @param elements The array of Expression nodes.
+         * @param needsUniqueCopy A value indicating whether to ensure that the result is a fresh array.
+         * @param multiLine A value indicating whether the result should be emitted on multiple lines.
+         */
+        function transformAndSpreadElements(elements: NodeArray<Expression>, needsUniqueCopy: boolean, multiLine: boolean, hasTrailingComma: boolean): Expression {
+            // [source]
+            //      [a, ...b, c]
+            //
+            // [output]
+            //      [a].concat(b, [c])
+
+            // Map spans of spread expressions into their expressions and spans of other
+            // expressions into an array literal.
+            const numElements = elements.length;
+            const segments = flatten(
+                spanMap(elements, partitionSpread, (partition, visitPartition, _start, end) =>
+                    visitPartition(partition, multiLine, hasTrailingComma && end === numElements)
+                )
+            );
+
+            if (compilerOptions.downlevelIteration) {
+                if (segments.length === 1) {
+                    const firstSegment = segments[0];
+                    if (isCallExpression(firstSegment)
+                        && isIdentifier(firstSegment.expression)
+                        && (getEmitFlags(firstSegment.expression) & EmitFlags.HelperName)
+                        && firstSegment.expression.text === "___spread") {
+                        return segments[0];
+                    }
+                }
+
+                return createSpreadHelper(context, segments);
+            }
+            else {
+                if (segments.length === 1) {
+                    const firstElement = elements[0];
+                    return needsUniqueCopy && isSpreadElement(firstElement) && firstElement.expression.kind !== SyntaxKind.ArrayLiteralExpression
+                        ? createArraySlice(segments[0])
+                        : segments[0];
+                }
+
+                // Rewrite using the pattern <segment0>.concat(<segment1>, <segment2>, ...)
+                return createArrayConcat(segments.shift(), segments);
+            }
+        }
+
+        function partitionSpread(node: Expression) {
+            return isSpreadElement(node)
+                ? visitSpanOfSpreads
+                : visitSpanOfNonSpreads;
+        }
+
+        function visitSpanOfSpreads(chunk: Expression[]): VisitResult<Expression> {
+            return map(chunk, visitExpressionOfSpread);
+        }
+
+        function visitSpanOfNonSpreads(chunk: Expression[], multiLine: boolean, hasTrailingComma: boolean): VisitResult<Expression> {
+            return createArrayLiteral(
+                visitNodes(createNodeArray(chunk, hasTrailingComma), visitor, isExpression),
+                multiLine
+            );
+        }
+
+        function visitSpreadElement(node: SpreadElement) {
+            return visitNode(node.expression, visitor, isExpression);
+        }
+
+        /**
+         * Transforms the expression of a SpreadExpression node.
+         *
+         * @param node A SpreadExpression node.
+         */
+        function visitExpressionOfSpread(node: SpreadElement) {
+            return visitNode(node.expression, visitor, isExpression);
+        }
+
+        /**
+         * Visits a template literal.
+         *
+         * @param node A template literal.
+         */
+        function visitTemplateLiteral(node: LiteralExpression): LeftHandSideExpression {
+            return setTextRange(createLiteral(node.text), node);
+        }
+
+        /**
+         * Visits a string literal with an extended unicode escape.
+         *
+         * @param node A string literal.
+         */
+        function visitStringLiteral(node: StringLiteral) {
+            if (node.hasExtendedUnicodeEscape) {
+                return setTextRange(createLiteral(node.text), node);
+            }
+            return node;
+        }
+
+        /**
+         * Visits a binary or octal (ES6) numeric literal.
+         *
+         * @param node A string literal.
+         */
+        function visitNumericLiteral(node: NumericLiteral) {
+            if (node.numericLiteralFlags & NumericLiteralFlags.BinaryOrOctalSpecifier) {
+                return setTextRange(createNumericLiteral(node.text), node);
+            }
+            return node;
+        }
+
+        /**
+         * Visits a TaggedTemplateExpression node.
+         *
+         * @param node A TaggedTemplateExpression node.
+         */
+        function visitTaggedTemplateExpression(node: TaggedTemplateExpression) {
+            // Visit the tag expression
+            const tag = visitNode(node.tag, visitor, isExpression);
+
+            // Allocate storage for the template site object
+            const temp = createTempVariable(hoistVariableDeclaration);
+
+            // Build up the template arguments and the raw and cooked strings for the template.
+            const templateArguments: Expression[] = [temp];
+            const cookedStrings: Expression[] = [];
+            const rawStrings: Expression[] = [];
+            const template = node.template;
+            if (isNoSubstitutionTemplateLiteral(template)) {
+                cookedStrings.push(createLiteral(template.text));
+                rawStrings.push(getRawLiteral(template));
+            }
+            else {
+                cookedStrings.push(createLiteral(template.head.text));
+                rawStrings.push(getRawLiteral(template.head));
+                for (const templateSpan of template.templateSpans) {
+                    cookedStrings.push(createLiteral(templateSpan.literal.text));
+                    rawStrings.push(getRawLiteral(templateSpan.literal));
+                    templateArguments.push(visitNode(templateSpan.expression, visitor, isExpression));
+                }
+            }
+
+            // NOTE: The parentheses here is entirely optional as we are now able to auto-
+            //       parenthesize when rebuilding the tree. This should be removed in a
+            //       future version. It is here for now to match our existing emit.
+            return createParen(
+                inlineExpressions([
+                    createAssignment(temp, createArrayLiteral(cookedStrings)),
+                    createAssignment(createPropertyAccess(temp, "raw"), createArrayLiteral(rawStrings)),
+                    createCall(tag, /*typeArguments*/ undefined, templateArguments)
+                ])
+            );
+        }
+
+        /**
+         * Creates an ES5 compatible literal from an ES6 template literal.
+         *
+         * @param node The ES6 template literal.
+         */
+        function getRawLiteral(node: LiteralLikeNode) {
+            // Find original source text, since we need to emit the raw strings of the tagged template.
+            // The raw strings contain the (escaped) strings of what the user wrote.
+            // Examples: `\n` is converted to "\\n", a template string with a newline to "\n".
+            let text = getSourceTextOfNodeFromSourceFile(currentSourceFile, node);
+
+            // text contains the original source, it will also contain quotes ("`"), dolar signs and braces ("${" and "}"),
+            // thus we need to remove those characters.
+            // First template piece starts with "`", others with "}"
+            // Last template piece ends with "`", others with "${"
+            const isLast = node.kind === SyntaxKind.NoSubstitutionTemplateLiteral || node.kind === SyntaxKind.TemplateTail;
+            text = text.substring(1, text.length - (isLast ? 1 : 2));
+
+            // Newline normalization:
+            // ES6 Spec 11.8.6.1 - Static Semantics of TV's and TRV's
+            // <CR><LF> and <CR> LineTerminatorSequences are normalized to <LF> for both TV and TRV.
+            text = text.replace(/\r\n?/g, "\n");
+            return setTextRange(createLiteral(text), node);
+        }
+
+        /**
+         * Visits a TemplateExpression node.
+         *
+         * @param node A TemplateExpression node.
+         */
+        function visitTemplateExpression(node: TemplateExpression): Expression {
+            const expressions: Expression[] = [];
+            addTemplateHead(expressions, node);
+            addTemplateSpans(expressions, node);
+
+            // createAdd will check if each expression binds less closely than binary '+'.
+            // If it does, it wraps the expression in parentheses. Otherwise, something like
+            //    `abc${ 1 << 2 }`
+            // becomes
+            //    "abc" + 1 << 2 + ""
+            // which is really
+            //    ("abc" + 1) << (2 + "")
+            // rather than
+            //    "abc" + (1 << 2) + ""
+            const expression = reduceLeft(expressions, createAdd);
+            if (nodeIsSynthesized(expression)) {
+                expression.pos = node.pos;
+                expression.end = node.end;
+            }
+
+            return expression;
+        }
+
+        /**
+         * Gets a value indicating whether we need to include the head of a TemplateExpression.
+         *
+         * @param node A TemplateExpression node.
+         */
+        function shouldAddTemplateHead(node: TemplateExpression) {
+            // If this expression has an empty head literal and the first template span has a non-empty
+            // literal, then emitting the empty head literal is not necessary.
+            //     `${ foo } and ${ bar }`
+            // can be emitted as
+            //     foo + " and " + bar
+            // This is because it is only required that one of the first two operands in the emit
+            // output must be a string literal, so that the other operand and all following operands
+            // are forced into strings.
+            //
+            // If the first template span has an empty literal, then the head must still be emitted.
+            //     `${ foo }${ bar }`
+            // must still be emitted as
+            //     "" + foo + bar
+
+            // There is always atleast one templateSpan in this code path, since
+            // NoSubstitutionTemplateLiterals are directly emitted via emitLiteral()
+            Debug.assert(node.templateSpans.length !== 0);
+
+            return node.head.text.length !== 0 || node.templateSpans[0].literal.text.length === 0;
+        }
+
+        /**
+         * Adds the head of a TemplateExpression to an array of expressions.
+         *
+         * @param expressions An array of expressions.
+         * @param node A TemplateExpression node.
+         */
+        function addTemplateHead(expressions: Expression[], node: TemplateExpression): void {
+            if (!shouldAddTemplateHead(node)) {
+                return;
+            }
+
+            expressions.push(createLiteral(node.head.text));
+        }
+
+        /**
+         * Visits and adds the template spans of a TemplateExpression to an array of expressions.
+         *
+         * @param expressions An array of expressions.
+         * @param node A TemplateExpression node.
+         */
+        function addTemplateSpans(expressions: Expression[], node: TemplateExpression): void {
+            for (const span of node.templateSpans) {
+                expressions.push(visitNode(span.expression, visitor, isExpression));
+
+                // Only emit if the literal is non-empty.
+                // The binary '+' operator is left-associative, so the first string concatenation
+                // with the head will force the result up to this point to be a string.
+                // Emitting a '+ ""' has no semantic effect for middles and tails.
+                if (span.literal.text.length !== 0) {
+                    expressions.push(createLiteral(span.literal.text));
+                }
+            }
+        }
+
+        /**
+         * Visits the `super` keyword
+         */
+        function visitSuperKeyword(isExpressionOfCall: boolean): LeftHandSideExpression {
+            return hierarchyFacts & HierarchyFacts.NonStaticClassElement
+                && !isExpressionOfCall
+                    ? createPropertyAccess(createIdentifier("_super"), "prototype")
+                    : createIdentifier("_super");
+        }
+
+        function visitMetaProperty(node: MetaProperty) {
+            if (node.keywordToken === SyntaxKind.NewKeyword && node.name.text === "target") {
+                if (hierarchyFacts & HierarchyFacts.ComputedPropertyName) {
+                    hierarchyFacts |= HierarchyFacts.NewTargetInComputedPropertyName;
+                }
+                else {
+                    hierarchyFacts |= HierarchyFacts.NewTarget;
+                }
+                return createIdentifier("_newTarget");
+            }
+            return node;
+        }
+
+        /**
+         * Called by the printer just before a node is printed.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to be printed.
+         * @param emitCallback The callback used to emit the node.
+         */
+        function onEmitNode(hint: EmitHint, node: Node, emitCallback: (hint: EmitHint, node: Node) => void) {
+            if (enabledSubstitutions & ES2015SubstitutionFlags.CapturedThis && isFunctionLike(node)) {
+                // If we are tracking a captured `this`, keep track of the enclosing function.
+                const ancestorFacts = enterSubtree(
+                    HierarchyFacts.FunctionExcludes,
+                    getEmitFlags(node) & EmitFlags.CapturesThis
+                        ? HierarchyFacts.FunctionIncludes | HierarchyFacts.CapturesThis
+                        : HierarchyFacts.FunctionIncludes);
+                previousOnEmitNode(hint, node, emitCallback);
+                exitSubtree(ancestorFacts, HierarchyFacts.None, HierarchyFacts.None);
+                return;
+            }
+            previousOnEmitNode(hint, node, emitCallback);
+        }
+
+        /**
+         * Enables a more costly code path for substitutions when we determine a source file
+         * contains block-scoped bindings (e.g. `let` or `const`).
+         */
+        function enableSubstitutionsForBlockScopedBindings() {
+            if ((enabledSubstitutions & ES2015SubstitutionFlags.BlockScopedBindings) === 0) {
+                enabledSubstitutions |= ES2015SubstitutionFlags.BlockScopedBindings;
+                context.enableSubstitution(SyntaxKind.Identifier);
+            }
+        }
+
+        /**
+         * Enables a more costly code path for substitutions when we determine a source file
+         * contains a captured `this`.
+         */
+        function enableSubstitutionsForCapturedThis() {
+            if ((enabledSubstitutions & ES2015SubstitutionFlags.CapturedThis) === 0) {
+                enabledSubstitutions |= ES2015SubstitutionFlags.CapturedThis;
+                context.enableSubstitution(SyntaxKind.ThisKeyword);
+                context.enableEmitNotification(SyntaxKind.Constructor);
+                context.enableEmitNotification(SyntaxKind.MethodDeclaration);
+                context.enableEmitNotification(SyntaxKind.GetAccessor);
+                context.enableEmitNotification(SyntaxKind.SetAccessor);
+                context.enableEmitNotification(SyntaxKind.ArrowFunction);
+                context.enableEmitNotification(SyntaxKind.FunctionExpression);
+                context.enableEmitNotification(SyntaxKind.FunctionDeclaration);
+            }
+        }
+
+        /**
+         * Hooks node substitutions.
+         *
+         * @param hint The context for the emitter.
+         * @param node The node to substitute.
+         */
+        function onSubstituteNode(hint: EmitHint, node: Node) {
+            node = previousOnSubstituteNode(hint, node);
+
+            if (hint === EmitHint.Expression) {
+                return substituteExpression(node);
+            }
+
+            if (isIdentifier(node)) {
+                return substituteIdentifier(node);
+            }
+
+            return node;
+        }
+
+        /**
+         * Hooks substitutions for non-expression identifiers.
+         */
+        function substituteIdentifier(node: Identifier) {
+            // Only substitute the identifier if we have enabled substitutions for block-scoped
+            // bindings.
+            if (enabledSubstitutions & ES2015SubstitutionFlags.BlockScopedBindings && !isInternalName(node)) {
+                const original = getParseTreeNode(node, isIdentifier);
+                if (original && isNameOfDeclarationWithCollidingName(original)) {
+                    return setTextRange(getGeneratedNameForNode(original), node);
+                }
+            }
+
+            return node;
+        }
+
+        /**
+         * Determines whether a name is the name of a declaration with a colliding name.
+         * NOTE: This function expects to be called with an original source tree node.
+         *
+         * @param node An original source tree node.
+         */
+        function isNameOfDeclarationWithCollidingName(node: Identifier) {
+            const parent = node.parent;
+            switch (parent.kind) {
+                case SyntaxKind.BindingElement:
+                case SyntaxKind.ClassDeclaration:
+                case SyntaxKind.EnumDeclaration:
+                case SyntaxKind.VariableDeclaration:
+                    return (<NamedDeclaration>parent).name === node
+                        && resolver.isDeclarationWithCollidingName(<Declaration>parent);
+            }
+
+            return false;
+        }
+
+        /**
+         * Substitutes an expression.
+         *
+         * @param node An Expression node.
+         */
+        function substituteExpression(node: Node) {
+            switch (node.kind) {
+                case SyntaxKind.Identifier:
+                    return substituteExpressionIdentifier(<Identifier>node);
+
+                case SyntaxKind.ThisKeyword:
+                    return substituteThisKeyword(<PrimaryExpression>node);
+            }
+
+            return node;
+        }
+
+        /**
+         * Substitutes an expression identifier.
+         *
+         * @param node An Identifier node.
+         */
+        function substituteExpressionIdentifier(node: Identifier): Identifier {
+            if (enabledSubstitutions & ES2015SubstitutionFlags.BlockScopedBindings && !isInternalName(node)) {
+                const declaration = resolver.getReferencedDeclarationWithCollidingName(node);
+                if (declaration && !(isClassLike(declaration) && isPartOfClassBody(declaration, node))) {
+                    return setTextRange(getGeneratedNameForNode(getNameOfDeclaration(declaration)), node);
+                }
+            }
+
+            return node;
+        }
+
+        function isPartOfClassBody(declaration: ClassLikeDeclaration, node: Identifier) {
+            let currentNode = getParseTreeNode(node);
+            if (!currentNode || currentNode === declaration || currentNode.end <= declaration.pos || currentNode.pos >= declaration.end) {
+                // if the node has no correlation to a parse tree node, its definitely not
+                // part of the body.
+                // if the node is outside of the document range of the declaration, its
+                // definitely not part of the body.
+                return false;
+            }
+            const blockScope = getEnclosingBlockScopeContainer(declaration);
+            while (currentNode) {
+                if (currentNode === blockScope || currentNode === declaration) {
+                    // if we are in the enclosing block scope of the declaration, we are definitely
+                    // not inside the class body.
+                    return false;
+                }
+                if (isClassElement(currentNode) && currentNode.parent === declaration) {
+                    return true;
+                }
+                currentNode = currentNode.parent;
+            }
+            return false;
+        }
+
+        /**
+         * Substitutes `this` when contained within an arrow function.
+         *
+         * @param node The ThisKeyword node.
+         */
+        function substituteThisKeyword(node: PrimaryExpression): PrimaryExpression {
+            if (enabledSubstitutions & ES2015SubstitutionFlags.CapturedThis
+                && hierarchyFacts & HierarchyFacts.CapturesThis) {
+                return setTextRange(createIdentifier("_this"), node);
+            }
+            return node;
+        }
+
+        function getClassMemberPrefix(node: ClassExpression | ClassDeclaration, member: ClassElement) {
+            return hasModifier(member, ModifierFlags.Static)
+                ? getInternalName(node)
+                : createPropertyAccess(getInternalName(node), "prototype");
+        }
+
+        function hasSynthesizedDefaultSuperCall(constructor: ConstructorDeclaration, hasExtendsClause: boolean) {
+            if (!constructor || !hasExtendsClause) {
+                return false;
+            }
+
+            if (some(constructor.parameters)) {
+                return false;
+            }
+
+            const statement = firstOrUndefined(constructor.body.statements);
+            if (!statement || !nodeIsSynthesized(statement) || statement.kind !== SyntaxKind.ExpressionStatement) {
+                return false;
+            }
+
+            const statementExpression = (<ExpressionStatement>statement).expression;
+            if (!nodeIsSynthesized(statementExpression) || statementExpression.kind !== SyntaxKind.CallExpression) {
+                return false;
+            }
+
+            const callTarget = (<CallExpression>statementExpression).expression;
+            if (!nodeIsSynthesized(callTarget) || callTarget.kind !== SyntaxKind.SuperKeyword) {
+                return false;
+            }
+
+            const callArgument = singleOrUndefined((<CallExpression>statementExpression).arguments);
+            if (!callArgument || !nodeIsSynthesized(callArgument) || callArgument.kind !== SyntaxKind.SpreadElement) {
+                return false;
+            }
+
+            const expression = (<SpreadElement>callArgument).expression;
+            return isIdentifier(expression) && expression.text === "arguments";
+        }
+    }
+
+    function createExtendsHelper(context: TransformationContext, name: Identifier) {
+        context.requestEmitHelper(extendsHelper);
+        return createCall(
+            getHelperName("__extends"),
+            /*typeArguments*/ undefined,
+            [
+                name,
+                createIdentifier("_super")
+            ]
+        );
+    }
+
+    const extendsHelper: EmitHelper = {
+        name: "typescript:extends",
+        scoped: false,
+        priority: 0,
+        text: `
+            var __extends = (this && this.__extends) || (function () {
+                var extendStatics = Object.setPrototypeOf ||
+                    ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
+                    function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
+                return function (d, b) {
+                    extendStatics(d, b);
+                    function __() { this.constructor = d; }
+                    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+                };
+            })();`
+    };
+}
diff --git a/src/compiler/transformers/es2016.ts b/src/compiler/transformers/es2016.ts
new file mode 100644
index 0000000..a946899
--- /dev/null
+++ b/src/compiler/transformers/es2016.ts
@@ -0,0 +1,105 @@
+/// <reference path="../factory.ts" />
+/// <reference path="../visitor.ts" />
+
+/*@internal*/
+namespace ts {
+    export function transformES2016(context: TransformationContext) {
+        const { hoistVariableDeclaration } = context;
+
+        return transformSourceFile;
+
+        function transformSourceFile(node: SourceFile) {
+            if (node.isDeclarationFile) {
+                return node;
+            }
+
+            return visitEachChild(node, visitor, context);
+        }
+
+        function visitor(node: Node): VisitResult<Node> {
+            if ((node.transformFlags & TransformFlags.ContainsES2016) === 0) {
+                return node;
+            }
+            switch (node.kind) {
+                case SyntaxKind.BinaryExpression:
+                    return visitBinaryExpression(<BinaryExpression>node);
+                default:
+                    return visitEachChild(node, visitor, context);
+            }
+        }
+
+        function visitBinaryExpression(node: BinaryExpression): Expression {
+            switch (node.operatorToken.kind) {
+                case SyntaxKind.AsteriskAsteriskEqualsToken:
+                    return visitExponentiationAssignmentExpression(node);
+                case SyntaxKind.AsteriskAsteriskToken:
+                    return visitExponentiationExpression(node);
+                default:
+                    return visitEachChild(node, visitor, context);
+            }
+        }
+
+        function visitExponentiationAssignmentExpression(node: BinaryExpression) {
+            let target: Expression;
+            let value: Expression;
+            const left = visitNode(node.left, visitor, isExpression);
+            const right = visitNode(node.right, visitor, isExpression);
+            if (isElementAccessExpression(left)) {
+                // Transforms `a[x] **= b` into `(_a = a)[_x = x] = Math.pow(_a[_x], b)`
+                const expressionTemp = createTempVariable(hoistVariableDeclaration);
+                const argumentExpressionTemp = createTempVariable(hoistVariableDeclaration);
+                target = setTextRange(
+                    createElementAccess(
+                        setTextRange(createAssignment(expressionTemp, left.expression), left.expression),
+                        setTextRange(createAssignment(argumentExpressionTemp, left.argumentExpression), left.argumentExpression)
+                    ),
+                    left
+                );
+                value = setTextRange(
+                    createElementAccess(
+                        expressionTemp,
+                        argumentExpressionTemp
+                    ),
+                    left
+                );
+            }
+            else if (isPropertyAccessExpression(left)) {
+                // Transforms `a.x **= b` into `(_a = a).x = Math.pow(_a.x, b)`
+                const expressionTemp = createTempVariable(hoistVariableDeclaration);
+                target = setTextRange(
+                    createPropertyAccess(
+                        setTextRange(createAssignment(expressionTemp, left.expression), left.expression),
+                        left.name
+                    ),
+                    left
+                );
+                value = setTextRange(
+                    createPropertyAccess(
+                        expressionTemp,
+                        left.name
+                    ),
+                    left
+                );
+            }
+            else {
+                // Transforms `a **= b` into `a = Math.pow(a, b)`
+                target = left;
+                value = left;
+            }
+            return setTextRange(
+                createAssignment(
+                    target,
+                    createMathPow(value, right, /*location*/ node)
+                ),
+                node
+            );
+        }
+
+        function visitExponentiationExpression(node: BinaryExpression) {
+            // Transforms `a ** b` into `Math.pow(a, b)`
+            const left = visitNode(node.left, visitor, isExpression);
+            const right = visitNode(node.right, visitor, isExpression);
+            return createMathPow(left, right, /*location*/ node);
+        }
+    }
+}
diff --git a/src/compiler/transformers/es2017.ts b/src/compiler/transformers/es2017.ts
new file mode 100644
index 0000000..3565547
--- /dev/null
+++ b/src/compiler/transformers/es2017.ts
@@ -0,0 +1,504 @@
+/// <reference path="../factory.ts" />
+/// <reference path="../visitor.ts" />
+
+/*@internal*/
+namespace ts {
+    type SuperContainer = ClassDeclaration | MethodDeclaration | GetAccessorDeclaration | SetAccessorDeclaration | ConstructorDeclaration;
+
+    const enum ES2017SubstitutionFlags {
+        /** Enables substitutions for async methods with `super` calls. */
+        AsyncMethodsWithSuper = 1 << 0
+    }
+
+    export function transformES2017(context: TransformationContext) {
+        const {
+            startLexicalEnvironment,
+            resumeLexicalEnvironment,
+            endLexicalEnvironment
+        } = context;
+
+        const resolver = context.getEmitResolver();
+        const compilerOptions = context.getCompilerOptions();
+        const languageVersion = getEmitScriptTarget(compilerOptions);
+
+        // These variables contain state that changes as we descend into the tree.
+        let currentSourceFile: SourceFile;
+
+        /**
+         * Keeps track of whether expression substitution has been enabled for specific edge cases.
+         * They are persisted between each SourceFile transformation and should not be reset.
+         */
+        let enabledSubstitutions: ES2017SubstitutionFlags;
+
+        /**
+         * This keeps track of containers where `super` is valid, for use with
+         * just-in-time substitution for `super` expressions inside of async methods.
+         */
+        let enclosingSuperContainerFlags: NodeCheckFlags = 0;
+
+        // Save the previous transformation hooks.
+        const previousOnEmitNode = context.onEmitNode;
+        const previousOnSubstituteNode = context.onSubstituteNode;
+
+        // Set new transformation hooks.
+        context.onEmitNode = onEmitNode;
+        context.onSubstituteNode = onSubstituteNode;
+
+        return transformSourceFile;
+
+        function transformSourceFile(node: SourceFile) {
+            if (node.isDeclarationFile) {
+                return node;
+            }
+
+            currentSourceFile = node;
+
+            const visited = visitEachChild(node, visitor, context);
+            addEmitHelpers(visited, context.readEmitHelpers());
+
+            currentSourceFile = undefined;
+            return visited;
+        }
+
+        function visitor(node: Node): VisitResult<Node> {
+            if ((node.transformFlags & TransformFlags.ContainsES2017) === 0) {
+                return node;
+            }
+
+            switch (node.kind) {
+                case SyntaxKind.AsyncKeyword:
+                    // ES2017 async modifier should be elided for targets < ES2017
+                    return undefined;
+
+                case SyntaxKind.AwaitExpression:
+                    return visitAwaitExpression(<AwaitExpression>node);
+
+                case SyntaxKind.MethodDeclaration:
+                    return visitMethodDeclaration(<MethodDeclaration>node);
+
+                case SyntaxKind.FunctionDeclaration:
+                    return visitFunctionDeclaration(<FunctionDeclaration>node);
+
+                case SyntaxKind.FunctionExpression:
+                    return visitFunctionExpression(<FunctionExpression>node);
+
+                case SyntaxKind.ArrowFunction:
+                    return visitArrowFunction(<ArrowFunction>node);
+
+                default:
+                    return visitEachChild(node, visitor, context);
+            }
+        }
+
+        /**
+         * Visits an AwaitExpression node.
+         *
+         * This function will be called any time a ES2017 await expression is encountered.
+         *
+         * @param node The node to visit.
+         */
+        function visitAwaitExpression(node: AwaitExpression): Expression {
+            return setOriginalNode(
+                setTextRange(
+                    createYield(
+                        /*asteriskToken*/ undefined,
+                        visitNode(node.expression, visitor, isExpression)
+                    ),
+                    node
+                ),
+                node
+            );
+        }
+
+        /**
+         * Visits a MethodDeclaration node.
+         *
+         * This function will be called when one of the following conditions are met:
+         * - The node is marked as async
+         *
+         * @param node The node to visit.
+         */
+        function visitMethodDeclaration(node: MethodDeclaration) {
+            return updateMethod(
+                node,
+                /*decorators*/ undefined,
+                visitNodes(node.modifiers, visitor, isModifier),
+                node.asteriskToken,
+                node.name,
+                /*questionToken*/ undefined,
+                /*typeParameters*/ undefined,
+                visitParameterList(node.parameters, visitor, context),
+                /*type*/ undefined,
+                getFunctionFlags(node) & FunctionFlags.Async
+                    ? transformAsyncFunctionBody(node)
+                    : visitFunctionBody(node.body, visitor, context)
+            );
+        }
+
+        /**
+         * Visits a FunctionDeclaration node.
+         *
+         * This function will be called when one of the following conditions are met:
+         * - The node is marked async
+         *
+         * @param node The node to visit.
+         */
+        function visitFunctionDeclaration(node: FunctionDeclaration): VisitResult<Statement> {
+            return updateFunctionDeclaration(
+                node,
+                /*decorators*/ undefined,
+                visitNodes(node.modifiers, visitor, isModifier),
+                node.asteriskToken,
+                node.name,
+                /*typeParameters*/ undefined,
+                visitParameterList(node.parameters, visitor, context),
+                /*type*/ undefined,
+                getFunctionFlags(node) & FunctionFlags.Async
+                    ? transformAsyncFunctionBody(node)
+                    : visitFunctionBody(node.body, visitor, context)
+            );
+        }
+
+        /**
+         * Visits a FunctionExpression node.
+         *
+         * This function will be called when one of the following conditions are met:
+         * - The node is marked async
+         *
+         * @param node The node to visit.
+         */
+        function visitFunctionExpression(node: FunctionExpression): Expression {
+            return updateFunctionExpression(
+                node,
+                visitNodes(node.modifiers, visitor, isModifier),
+                node.asteriskToken,
+                node.name,
+                /*typeParameters*/ undefined,
+                visitParameterList(node.parameters, visitor, context),
+                /*type*/ undefined,
+                getFunctionFlags(node) & FunctionFlags.Async
+                    ? transformAsyncFunctionBody(node)
+                    : visitFunctionBody(node.body, visitor, context)
+            );
+        }
+
+        /**
+         * Visits an ArrowFunction.
+         *
+         * This function will be called when one of the following conditions are met:
+         * - The node is marked async
+         *
+         * @param node The node to visit.
+         */
+        function visitArrowFunction(node: ArrowFunction) {
+            return updateArrowFunction(
+                node,
+                visitNodes(node.modifiers, visitor, isModifier),
+                /*typeParameters*/ undefined,
+                visitParameterList(node.parameters, visitor, context),
+                /*type*/ undefined,
+                getFunctionFlags(node) & FunctionFlags.Async
+                    ? transformAsyncFunctionBody(node)
+                    : visitFunctionBody(node.body, visitor, context)
+            );
+        }
+
+        function transformAsyncFunctionBody(node: MethodDeclaration | AccessorDeclaration | FunctionDeclaration | FunctionExpression): FunctionBody;
+        function transformAsyncFunctionBody(node: ArrowFunction): ConciseBody;
+        function transformAsyncFunctionBody(node: FunctionLikeDeclaration): ConciseBody {
+            resumeLexicalEnvironment();
+
+            const original = getOriginalNode(node, isFunctionLike);
+            const nodeType = original.type;
+            const promiseConstructor = languageVersion < ScriptTarget.ES2015 ? getPromiseConstructor(nodeType) : undefined;
+            const isArrowFunction = node.kind === SyntaxKind.ArrowFunction;
+            const hasLexicalArguments = (resolver.getNodeCheckFlags(node) & NodeCheckFlags.CaptureArguments) !== 0;
+
+            // An async function is emit as an outer function that calls an inner
+            // generator function. To preserve lexical bindings, we pass the current
+            // `this` and `arguments` objects to `__awaiter`. The generator function
+            // passed to `__awaiter` is executed inside of the callback to the
+            // promise constructor.
+
+            if (!isArrowFunction) {
+                const statements: Statement[] = [];
+                const statementOffset = addPrologue(statements, (<Block>node.body).statements, /*ensureUseStrict*/ false, visitor);
+                statements.push(
+                    createReturn(
+                        createAwaiterHelper(
+                            context,
+                            hasLexicalArguments,
+                            promiseConstructor,
+                            transformFunctionBodyWorker(<Block>node.body, statementOffset)
+                        )
+                    )
+                );
+
+                addRange(statements, endLexicalEnvironment());
+
+                const block = createBlock(statements, /*multiLine*/ true);
+                setTextRange(block, node.body);
+
+                // Minor optimization, emit `_super` helper to capture `super` access in an arrow.
+                // This step isn't needed if we eventually transform this to ES5.
+                if (languageVersion >= ScriptTarget.ES2015) {
+                    if (resolver.getNodeCheckFlags(node) & NodeCheckFlags.AsyncMethodWithSuperBinding) {
+                        enableSubstitutionForAsyncMethodsWithSuper();
+                        addEmitHelper(block, advancedAsyncSuperHelper);
+                    }
+                    else if (resolver.getNodeCheckFlags(node) & NodeCheckFlags.AsyncMethodWithSuper) {
+                        enableSubstitutionForAsyncMethodsWithSuper();
+                        addEmitHelper(block, asyncSuperHelper);
+                    }
+                }
+
+                return block;
+            }
+            else {
+                const expression = createAwaiterHelper(
+                    context,
+                    hasLexicalArguments,
+                    promiseConstructor,
+                    transformFunctionBodyWorker(node.body)
+                );
+
+                const declarations = endLexicalEnvironment();
+                if (some(declarations)) {
+                    const block = convertToFunctionBody(expression);
+                    return updateBlock(block, setTextRange(createNodeArray(concatenate(block.statements, declarations)), block.statements));
+                }
+
+                return expression;
+            }
+        }
+
+        function transformFunctionBodyWorker(body: ConciseBody, start?: number) {
+            if (isBlock(body)) {
+                return updateBlock(body, visitLexicalEnvironment(body.statements, visitor, context, start));
+            }
+            else {
+                startLexicalEnvironment();
+                const visited = convertToFunctionBody(visitNode(body, visitor, isConciseBody));
+                const declarations = endLexicalEnvironment();
+                return updateBlock(visited, setTextRange(createNodeArray(concatenate(visited.statements, declarations)), visited.statements));
+            }
+        }
+
+        function getPromiseConstructor(type: TypeNode) {
+            const typeName = type && getEntityNameFromTypeNode(type);
+            if (typeName && isEntityName(typeName)) {
+                const serializationKind = resolver.getTypeReferenceSerializationKind(typeName);
+                if (serializationKind === TypeReferenceSerializationKind.TypeWithConstructSignatureAndValue
+                    || serializationKind === TypeReferenceSerializationKind.Unknown) {
+                    return typeName;
+                }
+            }
+
+            return undefined;
+        }
+
+        function enableSubstitutionForAsyncMethodsWithSuper() {
+            if ((enabledSubstitutions & ES2017SubstitutionFlags.AsyncMethodsWithSuper) === 0) {
+                enabledSubstitutions |= ES2017SubstitutionFlags.AsyncMethodsWithSuper;
+
+                // We need to enable substitutions for call, property access, and element access
+                // if we need to rewrite super calls.
+                context.enableSubstitution(SyntaxKind.CallExpression);
+                context.enableSubstitution(SyntaxKind.PropertyAccessExpression);
+                context.enableSubstitution(SyntaxKind.ElementAccessExpression);
+
+                // We need to be notified when entering and exiting declarations that bind super.
+                context.enableEmitNotification(SyntaxKind.ClassDeclaration);
+                context.enableEmitNotification(SyntaxKind.MethodDeclaration);
+                context.enableEmitNotification(SyntaxKind.GetAccessor);
+                context.enableEmitNotification(SyntaxKind.SetAccessor);
+                context.enableEmitNotification(SyntaxKind.Constructor);
+            }
+        }
+
+        /**
+         * Hook for node emit.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to emit.
+         * @param emit A callback used to emit the node in the printer.
+         */
+        function onEmitNode(hint: EmitHint, node: Node, emitCallback: (hint: EmitHint, node: Node) => void): void {
+            // If we need to support substitutions for `super` in an async method,
+            // we should track it here.
+            if (enabledSubstitutions & ES2017SubstitutionFlags.AsyncMethodsWithSuper && isSuperContainer(node)) {
+                const superContainerFlags = resolver.getNodeCheckFlags(node) & (NodeCheckFlags.AsyncMethodWithSuper | NodeCheckFlags.AsyncMethodWithSuperBinding);
+                if (superContainerFlags !== enclosingSuperContainerFlags) {
+                    const savedEnclosingSuperContainerFlags = enclosingSuperContainerFlags;
+                    enclosingSuperContainerFlags = superContainerFlags;
+                    previousOnEmitNode(hint, node, emitCallback);
+                    enclosingSuperContainerFlags = savedEnclosingSuperContainerFlags;
+                    return;
+                }
+            }
+            previousOnEmitNode(hint, node, emitCallback);
+        }
+
+        /**
+         * Hooks node substitutions.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to substitute.
+         */
+        function onSubstituteNode(hint: EmitHint, node: Node) {
+            node = previousOnSubstituteNode(hint, node);
+            if (hint === EmitHint.Expression && enclosingSuperContainerFlags) {
+                return substituteExpression(<Expression>node);
+            }
+
+            return node;
+        }
+
+        function substituteExpression(node: Expression) {
+            switch (node.kind) {
+                case SyntaxKind.PropertyAccessExpression:
+                    return substitutePropertyAccessExpression(<PropertyAccessExpression>node);
+                case SyntaxKind.ElementAccessExpression:
+                    return substituteElementAccessExpression(<ElementAccessExpression>node);
+                case SyntaxKind.CallExpression:
+                    return substituteCallExpression(<CallExpression>node);
+            }
+            return node;
+        }
+
+        function substitutePropertyAccessExpression(node: PropertyAccessExpression) {
+            if (node.expression.kind === SyntaxKind.SuperKeyword) {
+                return createSuperAccessInAsyncMethod(
+                    createLiteral(node.name.text),
+                    node
+                );
+            }
+            return node;
+        }
+
+        function substituteElementAccessExpression(node: ElementAccessExpression) {
+            if (node.expression.kind === SyntaxKind.SuperKeyword) {
+                return createSuperAccessInAsyncMethod(
+                    node.argumentExpression,
+                    node
+                );
+            }
+            return node;
+        }
+
+        function substituteCallExpression(node: CallExpression): Expression {
+            const expression = node.expression;
+            if (isSuperProperty(expression)) {
+                const argumentExpression = isPropertyAccessExpression(expression)
+                    ? substitutePropertyAccessExpression(expression)
+                    : substituteElementAccessExpression(expression);
+                return createCall(
+                    createPropertyAccess(argumentExpression, "call"),
+                    /*typeArguments*/ undefined,
+                    [
+                        createThis(),
+                        ...node.arguments
+                    ]
+                );
+            }
+            return node;
+        }
+
+        function isSuperContainer(node: Node): node is SuperContainer {
+            const kind = node.kind;
+            return kind === SyntaxKind.ClassDeclaration
+                || kind === SyntaxKind.Constructor
+                || kind === SyntaxKind.MethodDeclaration
+                || kind === SyntaxKind.GetAccessor
+                || kind === SyntaxKind.SetAccessor;
+        }
+
+        function createSuperAccessInAsyncMethod(argumentExpression: Expression, location: TextRange): LeftHandSideExpression {
+            if (enclosingSuperContainerFlags & NodeCheckFlags.AsyncMethodWithSuperBinding) {
+                return setTextRange(
+                    createPropertyAccess(
+                        createCall(
+                            createIdentifier("_super"),
+                            /*typeArguments*/ undefined,
+                            [argumentExpression]
+                        ),
+                        "value"
+                    ),
+                    location
+                );
+            }
+            else {
+                return setTextRange(
+                    createCall(
+                        createIdentifier("_super"),
+                        /*typeArguments*/ undefined,
+                        [argumentExpression]
+                    ),
+                    location
+                );
+            }
+        }
+    }
+
+    const awaiterHelper: EmitHelper = {
+        name: "typescript:awaiter",
+        scoped: false,
+        priority: 5,
+        text: `
+            var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
+                return new (P || (P = Promise))(function (resolve, reject) {
+                    function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
+                    function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
+                    function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
+                    step((generator = generator.apply(thisArg, _arguments || [])).next());
+                });
+            };`
+    };
+
+    function createAwaiterHelper(context: TransformationContext, hasLexicalArguments: boolean, promiseConstructor: EntityName | Expression, body: Block) {
+        context.requestEmitHelper(awaiterHelper);
+
+        const generatorFunc = createFunctionExpression(
+            /*modifiers*/ undefined,
+            createToken(SyntaxKind.AsteriskToken),
+            /*name*/ undefined,
+            /*typeParameters*/ undefined,
+            /*parameters*/ [],
+            /*type*/ undefined,
+            body
+        );
+
+        // Mark this node as originally an async function
+        (generatorFunc.emitNode || (generatorFunc.emitNode = {})).flags |= EmitFlags.AsyncFunctionBody;
+
+        return createCall(
+            getHelperName("__awaiter"),
+            /*typeArguments*/ undefined,
+            [
+                createThis(),
+                hasLexicalArguments ? createIdentifier("arguments") : createVoidZero(),
+                promiseConstructor ? createExpressionFromEntityName(promiseConstructor) : createVoidZero(),
+                generatorFunc
+            ]
+        );
+    }
+
+    export const asyncSuperHelper: EmitHelper = {
+        name: "typescript:async-super",
+        scoped: true,
+        text: `
+            const _super = name => super[name];
+        `
+    };
+
+    export const advancedAsyncSuperHelper: EmitHelper = {
+        name: "typescript:advanced-async-super",
+        scoped: true,
+        text: `
+            const _super = (function (geti, seti) {
+                const cache = Object.create(null);
+                return name => cache[name] || (cache[name] = { get value() { return geti(name); }, set value(v) { seti(name, v); } });
+            })(name => super[name], (name, value) => super[name] = value);
+        `
+    };
+}
diff --git a/src/compiler/transformers/es5.ts b/src/compiler/transformers/es5.ts
new file mode 100644
index 0000000..bcecb86
--- /dev/null
+++ b/src/compiler/transformers/es5.ts
@@ -0,0 +1,121 @@
+/// <reference path="../factory.ts" />
+/// <reference path="../visitor.ts" />
+
+/*@internal*/
+namespace ts {
+    /**
+     * Transforms ES5 syntax into ES3 syntax.
+     *
+     * @param context Context and state information for the transformation.
+     */
+    export function transformES5(context: TransformationContext) {
+        const compilerOptions = context.getCompilerOptions();
+
+        // enable emit notification only if using --jsx preserve or react-native
+        let previousOnEmitNode: (hint: EmitHint, node: Node, emitCallback: (hint: EmitHint, node: Node) => void) => void;
+        let noSubstitution: boolean[];
+        if (compilerOptions.jsx === JsxEmit.Preserve || compilerOptions.jsx === JsxEmit.ReactNative) {
+            previousOnEmitNode = context.onEmitNode;
+            context.onEmitNode = onEmitNode;
+            context.enableEmitNotification(SyntaxKind.JsxOpeningElement);
+            context.enableEmitNotification(SyntaxKind.JsxClosingElement);
+            context.enableEmitNotification(SyntaxKind.JsxSelfClosingElement);
+            noSubstitution = [];
+        }
+
+        const previousOnSubstituteNode = context.onSubstituteNode;
+        context.onSubstituteNode = onSubstituteNode;
+        context.enableSubstitution(SyntaxKind.PropertyAccessExpression);
+        context.enableSubstitution(SyntaxKind.PropertyAssignment);
+        return transformSourceFile;
+
+        /**
+         * Transforms an ES5 source file to ES3.
+         *
+         * @param node A SourceFile
+         */
+        function transformSourceFile(node: SourceFile) {
+            return node;
+        }
+
+        /**
+         * Called by the printer just before a node is printed.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to emit.
+         * @param emitCallback A callback used to emit the node.
+         */
+        function onEmitNode(hint: EmitHint, node: Node, emitCallback: (emitContext: EmitHint, node: Node) => void) {
+            switch (node.kind) {
+                case SyntaxKind.JsxOpeningElement:
+                case SyntaxKind.JsxClosingElement:
+                case SyntaxKind.JsxSelfClosingElement:
+                    const tagName = (<JsxOpeningElement | JsxClosingElement | JsxSelfClosingElement>node).tagName;
+                    noSubstitution[getOriginalNodeId(tagName)] = true;
+                    break;
+            }
+
+            previousOnEmitNode(hint, node, emitCallback);
+        }
+
+        /**
+         * Hooks node substitutions.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to substitute.
+         */
+        function onSubstituteNode(hint: EmitHint, node: Node) {
+            if (node.id && noSubstitution && noSubstitution[node.id]) {
+                return previousOnSubstituteNode(hint, node);
+            }
+
+            node = previousOnSubstituteNode(hint, node);
+            if (isPropertyAccessExpression(node)) {
+                return substitutePropertyAccessExpression(node);
+            }
+            else if (isPropertyAssignment(node)) {
+                return substitutePropertyAssignment(node);
+            }
+            return node;
+        }
+
+        /**
+         * Substitutes a PropertyAccessExpression whose name is a reserved word.
+         *
+         * @param node A PropertyAccessExpression
+         */
+        function substitutePropertyAccessExpression(node: PropertyAccessExpression): Expression {
+            const literalName = trySubstituteReservedName(node.name);
+            if (literalName) {
+                return setTextRange(createElementAccess(node.expression, literalName), node);
+            }
+            return node;
+        }
+
+        /**
+         * Substitutes a PropertyAssignment whose name is a reserved word.
+         *
+         * @param node A PropertyAssignment
+         */
+        function substitutePropertyAssignment(node: PropertyAssignment): PropertyAssignment {
+            const literalName = isIdentifier(node.name) && trySubstituteReservedName(node.name);
+            if (literalName) {
+                return updatePropertyAssignment(node, literalName, node.initializer);
+            }
+            return node;
+        }
+
+        /**
+         * If an identifier name is a reserved word, returns a string literal for the name.
+         *
+         * @param name An Identifier
+         */
+        function trySubstituteReservedName(name: Identifier) {
+            const token = name.originalKeywordKind || (nodeIsSynthesized(name) ? stringToToken(name.text) : undefined);
+            if (token >= SyntaxKind.FirstReservedWord && token <= SyntaxKind.LastReservedWord) {
+                return setTextRange(createLiteral(name), name);
+            }
+            return undefined;
+        }
+    }
+}
diff --git a/src/compiler/transformers/esnext.ts b/src/compiler/transformers/esnext.ts
new file mode 100644
index 0000000..a3aa013
--- /dev/null
+++ b/src/compiler/transformers/esnext.ts
@@ -0,0 +1,976 @@
+/// <reference path="../factory.ts" />
+/// <reference path="../visitor.ts" />
+/// <reference path="es2017.ts" />
+
+/*@internal*/
+namespace ts {
+    const enum ESNextSubstitutionFlags {
+        /** Enables substitutions for async methods with `super` calls. */
+        AsyncMethodsWithSuper = 1 << 0
+    }
+
+    export function transformESNext(context: TransformationContext) {
+        const {
+            resumeLexicalEnvironment,
+            endLexicalEnvironment,
+            hoistVariableDeclaration
+        } = context;
+
+        const resolver = context.getEmitResolver();
+        const compilerOptions = context.getCompilerOptions();
+        const languageVersion = getEmitScriptTarget(compilerOptions);
+
+        const previousOnEmitNode = context.onEmitNode;
+        context.onEmitNode = onEmitNode;
+
+        const previousOnSubstituteNode = context.onSubstituteNode;
+        context.onSubstituteNode = onSubstituteNode;
+
+        let enabledSubstitutions: ESNextSubstitutionFlags;
+        let enclosingFunctionFlags: FunctionFlags;
+        let enclosingSuperContainerFlags: NodeCheckFlags = 0;
+
+        return transformSourceFile;
+
+        function transformSourceFile(node: SourceFile) {
+            if (node.isDeclarationFile) {
+                return node;
+            }
+
+            const visited = visitEachChild(node, visitor, context);
+            addEmitHelpers(visited, context.readEmitHelpers());
+            return visited;
+        }
+
+        function visitor(node: Node): VisitResult<Node> {
+            return visitorWorker(node, /*noDestructuringValue*/ false);
+        }
+
+        function visitorNoDestructuringValue(node: Node): VisitResult<Node> {
+            return visitorWorker(node, /*noDestructuringValue*/ true);
+        }
+
+        function visitorNoAsyncModifier(node: Node): VisitResult<Node> {
+            if (node.kind === SyntaxKind.AsyncKeyword) {
+                return undefined;
+            }
+            return node;
+        }
+
+        function visitorWorker(node: Node, noDestructuringValue: boolean): VisitResult<Node> {
+            if ((node.transformFlags & TransformFlags.ContainsESNext) === 0) {
+                return node;
+            }
+
+            switch (node.kind) {
+                case SyntaxKind.AwaitExpression:
+                    return visitAwaitExpression(node as AwaitExpression);
+                case SyntaxKind.YieldExpression:
+                    return visitYieldExpression(node as YieldExpression);
+                case SyntaxKind.LabeledStatement:
+                    return visitLabeledStatement(node as LabeledStatement);
+                case SyntaxKind.ObjectLiteralExpression:
+                    return visitObjectLiteralExpression(node as ObjectLiteralExpression);
+                case SyntaxKind.BinaryExpression:
+                    return visitBinaryExpression(node as BinaryExpression, noDestructuringValue);
+                case SyntaxKind.VariableDeclaration:
+                    return visitVariableDeclaration(node as VariableDeclaration);
+                case SyntaxKind.ForOfStatement:
+                    return visitForOfStatement(node as ForOfStatement, /*outermostLabeledStatement*/ undefined);
+                case SyntaxKind.ForStatement:
+                    return visitForStatement(node as ForStatement);
+                case SyntaxKind.VoidExpression:
+                    return visitVoidExpression(node as VoidExpression);
+                case SyntaxKind.Constructor:
+                    return visitConstructorDeclaration(node as ConstructorDeclaration);
+                case SyntaxKind.MethodDeclaration:
+                    return visitMethodDeclaration(node as MethodDeclaration);
+                case SyntaxKind.GetAccessor:
+                    return visitGetAccessorDeclaration(node as GetAccessorDeclaration);
+                case SyntaxKind.SetAccessor:
+                    return visitSetAccessorDeclaration(node as SetAccessorDeclaration);
+                case SyntaxKind.FunctionDeclaration:
+                    return visitFunctionDeclaration(node as FunctionDeclaration);
+                case SyntaxKind.FunctionExpression:
+                    return visitFunctionExpression(node as FunctionExpression);
+                case SyntaxKind.ArrowFunction:
+                    return visitArrowFunction(node as ArrowFunction);
+                case SyntaxKind.Parameter:
+                    return visitParameter(node as ParameterDeclaration);
+                case SyntaxKind.ExpressionStatement:
+                    return visitExpressionStatement(node as ExpressionStatement);
+                case SyntaxKind.ParenthesizedExpression:
+                    return visitParenthesizedExpression(node as ParenthesizedExpression, noDestructuringValue);
+                default:
+                    return visitEachChild(node, visitor, context);
+            }
+        }
+
+        function visitAwaitExpression(node: AwaitExpression): Expression {
+            if (enclosingFunctionFlags & FunctionFlags.Async && enclosingFunctionFlags & FunctionFlags.Generator) {
+                return setOriginalNode(
+                    setTextRange(
+                        createYield(createAwaitHelper(context, visitNode(node.expression, visitor, isExpression))),
+                        /*location*/ node
+                    ),
+                    node
+                );
+            }
+            return visitEachChild(node, visitor, context);
+        }
+
+        function visitYieldExpression(node: YieldExpression) {
+            if (enclosingFunctionFlags & FunctionFlags.Async && enclosingFunctionFlags & FunctionFlags.Generator && node.asteriskToken) {
+                const expression = visitNode(node.expression, visitor, isExpression);
+                return setOriginalNode(
+                    setTextRange(
+                        createYield(
+                            createAwaitHelper(context,
+                                updateYield(
+                                    node,
+                                    node.asteriskToken,
+                                    createAsyncDelegatorHelper(
+                                        context,
+                                        createAsyncValuesHelper(context, expression, expression),
+                                        expression
+                                    )
+                                )
+                            )
+                        ),
+                        node
+                    ),
+                    node
+                );
+            }
+            return visitEachChild(node, visitor, context);
+        }
+
+        function visitLabeledStatement(node: LabeledStatement) {
+            if (enclosingFunctionFlags & FunctionFlags.Async && enclosingFunctionFlags & FunctionFlags.Generator) {
+                const statement = unwrapInnermostStatementOfLabel(node);
+                if (statement.kind === SyntaxKind.ForOfStatement && (<ForOfStatement>statement).awaitModifier) {
+                    return visitForOfStatement(<ForOfStatement>statement, node);
+                }
+                return restoreEnclosingLabel(visitEachChild(node, visitor, context), node);
+            }
+            return visitEachChild(node, visitor, context);
+        }
+
+        function chunkObjectLiteralElements(elements: ObjectLiteralElement[]): Expression[] {
+            let chunkObject: (ShorthandPropertyAssignment | PropertyAssignment)[];
+            const objects: Expression[] = [];
+            for (const e of elements) {
+                if (e.kind === SyntaxKind.SpreadAssignment) {
+                    if (chunkObject) {
+                        objects.push(createObjectLiteral(chunkObject));
+                        chunkObject = undefined;
+                    }
+                    const target = (e as SpreadAssignment).expression;
+                    objects.push(visitNode(target, visitor, isExpression));
+                }
+                else {
+                    if (!chunkObject) {
+                        chunkObject = [];
+                    }
+                    if (e.kind === SyntaxKind.PropertyAssignment) {
+                        const p = e as PropertyAssignment;
+                        chunkObject.push(createPropertyAssignment(p.name, visitNode(p.initializer, visitor, isExpression)));
+                    }
+                    else {
+                        chunkObject.push(e as ShorthandPropertyAssignment);
+                    }
+                }
+            }
+            if (chunkObject) {
+                objects.push(createObjectLiteral(chunkObject));
+            }
+
+            return objects;
+        }
+
+        function visitObjectLiteralExpression(node: ObjectLiteralExpression): Expression {
+            if (node.transformFlags & TransformFlags.ContainsObjectSpread) {
+                // spread elements emit like so:
+                // non-spread elements are chunked together into object literals, and then all are passed to __assign:
+                //     { a, ...o, b } => __assign({a}, o, {b});
+                // If the first element is a spread element, then the first argument to __assign is {}:
+                //     { ...o, a, b, ...o2 } => __assign({}, o, {a, b}, o2)
+                const objects = chunkObjectLiteralElements(node.properties);
+                if (objects.length && objects[0].kind !== SyntaxKind.ObjectLiteralExpression) {
+                    objects.unshift(createObjectLiteral());
+                }
+                return createAssignHelper(context, objects);
+            }
+            return visitEachChild(node, visitor, context);
+        }
+
+        function visitExpressionStatement(node: ExpressionStatement): ExpressionStatement {
+            return visitEachChild(node, visitorNoDestructuringValue, context);
+        }
+
+        function visitParenthesizedExpression(node: ParenthesizedExpression, noDestructuringValue: boolean): ParenthesizedExpression {
+            return visitEachChild(node, noDestructuringValue ? visitorNoDestructuringValue : visitor, context);
+        }
+
+        /**
+         * Visits a BinaryExpression that contains a destructuring assignment.
+         *
+         * @param node A BinaryExpression node.
+         */
+        function visitBinaryExpression(node: BinaryExpression, noDestructuringValue: boolean): Expression {
+            if (isDestructuringAssignment(node) && node.left.transformFlags & TransformFlags.ContainsObjectRest) {
+                return flattenDestructuringAssignment(
+                    node,
+                    visitor,
+                    context,
+                    FlattenLevel.ObjectRest,
+                    !noDestructuringValue
+                );
+            }
+            else if (node.operatorToken.kind === SyntaxKind.CommaToken) {
+                return updateBinary(
+                    node,
+                    visitNode(node.left, visitorNoDestructuringValue, isExpression),
+                    visitNode(node.right, noDestructuringValue ? visitorNoDestructuringValue : visitor, isExpression)
+                );
+            }
+            return visitEachChild(node, visitor, context);
+        }
+
+        /**
+         * Visits a VariableDeclaration node with a binding pattern.
+         *
+         * @param node A VariableDeclaration node.
+         */
+        function visitVariableDeclaration(node: VariableDeclaration): VisitResult<VariableDeclaration> {
+            // If we are here it is because the name contains a binding pattern with a rest somewhere in it.
+            if (isBindingPattern(node.name) && node.name.transformFlags & TransformFlags.ContainsObjectRest) {
+                return flattenDestructuringBinding(
+                    node,
+                    visitor,
+                    context,
+                    FlattenLevel.ObjectRest
+                );
+            }
+            return visitEachChild(node, visitor, context);
+        }
+
+        function visitForStatement(node: ForStatement): VisitResult<Statement> {
+            return updateFor(
+                node,
+                visitNode(node.initializer, visitorNoDestructuringValue, isForInitializer),
+                visitNode(node.condition, visitor, isExpression),
+                visitNode(node.incrementor, visitor, isExpression),
+                visitNode(node.statement, visitor, isStatement)
+            );
+        }
+
+        function visitVoidExpression(node: VoidExpression) {
+            return visitEachChild(node, visitorNoDestructuringValue, context);
+        }
+
+        /**
+         * Visits a ForOfStatement and converts it into a ES2015-compatible ForOfStatement.
+         *
+         * @param node A ForOfStatement.
+         */
+        function visitForOfStatement(node: ForOfStatement, outermostLabeledStatement: LabeledStatement): VisitResult<Statement> {
+            if (node.initializer.transformFlags & TransformFlags.ContainsObjectRest) {
+                node = transformForOfStatementWithObjectRest(node);
+            }
+            if (node.awaitModifier) {
+                return transformForAwaitOfStatement(node, outermostLabeledStatement);
+            }
+            else {
+                return restoreEnclosingLabel(visitEachChild(node, visitor, context), outermostLabeledStatement);
+            }
+        }
+
+        function transformForOfStatementWithObjectRest(node: ForOfStatement) {
+            const initializerWithoutParens = skipParentheses(node.initializer) as ForInitializer;
+            if (isVariableDeclarationList(initializerWithoutParens) || isAssignmentPattern(initializerWithoutParens)) {
+                let bodyLocation: TextRange;
+                let statementsLocation: TextRange;
+                const temp = createTempVariable(/*recordTempVariable*/ undefined);
+                const statements: Statement[] = [createForOfBindingStatement(initializerWithoutParens, temp)];
+                if (isBlock(node.statement)) {
+                    addRange(statements, node.statement.statements);
+                    bodyLocation = node.statement;
+                    statementsLocation = node.statement.statements;
+                }
+                return updateForOf(
+                    node,
+                    node.awaitModifier,
+                    setTextRange(
+                        createVariableDeclarationList(
+                            [
+                                setTextRange(createVariableDeclaration(temp), node.initializer)
+                            ],
+                            NodeFlags.Let
+                        ),
+                        node.initializer
+                    ),
+                    node.expression,
+                    setTextRange(
+                        createBlock(
+                            setTextRange(createNodeArray(statements), statementsLocation),
+                            /*multiLine*/ true
+                        ),
+                        bodyLocation
+                    )
+                );
+            }
+            return node;
+        }
+
+        function convertForOfStatementHead(node: ForOfStatement, boundValue: Expression) {
+            const binding = createForOfBindingStatement(node.initializer, boundValue);
+
+            let bodyLocation: TextRange;
+            let statementsLocation: TextRange;
+            const statements: Statement[] = [visitNode(binding, visitor, isStatement)];
+            const statement = visitNode(node.statement, visitor, isStatement);
+            if (isBlock(statement)) {
+                addRange(statements, statement.statements);
+                bodyLocation = statement;
+                statementsLocation = statement.statements;
+            }
+            else {
+                statements.push(statement);
+            }
+
+            return setEmitFlags(
+                setTextRange(
+                    createBlock(
+                        setTextRange(createNodeArray(statements), statementsLocation),
+                        /*multiLine*/ true
+                    ),
+                    bodyLocation
+                ),
+                EmitFlags.NoSourceMap | EmitFlags.NoTokenSourceMaps
+            );
+        }
+
+        function createDownlevelAwait(expression: Expression) {
+            return enclosingFunctionFlags & FunctionFlags.Generator
+                ? createYield(/*asteriskToken*/ undefined, createAwaitHelper(context, expression))
+                : createAwait(expression);
+        }
+
+        function transformForAwaitOfStatement(node: ForOfStatement, outermostLabeledStatement: LabeledStatement) {
+            const expression = visitNode(node.expression, visitor, isExpression);
+            const iterator = isIdentifier(expression) ? getGeneratedNameForNode(expression) : createTempVariable(/*recordTempVariable*/ undefined);
+            const result = isIdentifier(expression) ? getGeneratedNameForNode(iterator) : createTempVariable(/*recordTempVariable*/ undefined);
+            const errorRecord = createUniqueName("e");
+            const catchVariable = getGeneratedNameForNode(errorRecord);
+            const returnMethod = createTempVariable(/*recordTempVariable*/ undefined);
+            const callValues = createAsyncValuesHelper(context, expression, /*location*/ node.expression);
+            const callNext = createCall(createPropertyAccess(iterator, "next" ), /*typeArguments*/ undefined, []);
+            const getDone = createPropertyAccess(result, "done");
+            const getValue = createPropertyAccess(result, "value");
+            const callReturn = createFunctionCall(returnMethod, iterator, []);
+
+            hoistVariableDeclaration(errorRecord);
+            hoistVariableDeclaration(returnMethod);
+
+            const forStatement = setEmitFlags(
+                setTextRange(
+                    createFor(
+                        /*initializer*/ setEmitFlags(
+                            setTextRange(
+                                createVariableDeclarationList([
+                                    setTextRange(createVariableDeclaration(iterator, /*type*/ undefined, callValues), node.expression),
+                                    createVariableDeclaration(result)
+                                ]),
+                                node.expression
+                            ),
+                            EmitFlags.NoHoisting
+                        ),
+                        /*condition*/ createComma(
+                            createAssignment(result, createDownlevelAwait(callNext)),
+                            createLogicalNot(getDone)
+                        ),
+                        /*incrementor*/ undefined,
+                        /*statement*/ convertForOfStatementHead(node, createDownlevelAwait(getValue))
+                    ),
+                    /*location*/ node
+                ),
+                EmitFlags.NoTokenTrailingSourceMaps
+            );
+
+            return createTry(
+                createBlock([
+                    restoreEnclosingLabel(
+                        forStatement,
+                        outermostLabeledStatement
+                    )
+                ]),
+                createCatchClause(
+                    createVariableDeclaration(catchVariable),
+                    setEmitFlags(
+                        createBlock([
+                            createStatement(
+                                createAssignment(
+                                    errorRecord,
+                                    createObjectLiteral([
+                                        createPropertyAssignment("error", catchVariable)
+                                    ])
+                                )
+                            )
+                        ]),
+                        EmitFlags.SingleLine
+                    )
+                ),
+                createBlock([
+                    createTry(
+                        /*tryBlock*/ createBlock([
+                            setEmitFlags(
+                                createIf(
+                                    createLogicalAnd(
+                                        createLogicalAnd(
+                                            result,
+                                            createLogicalNot(getDone)
+                                        ),
+                                        createAssignment(
+                                            returnMethod,
+                                            createPropertyAccess(iterator, "return")
+                                        )
+                                    ),
+                                    createStatement(createDownlevelAwait(callReturn))
+                                ),
+                                EmitFlags.SingleLine
+                            )
+                        ]),
+                        /*catchClause*/ undefined,
+                        /*finallyBlock*/ setEmitFlags(
+                            createBlock([
+                                setEmitFlags(
+                                    createIf(
+                                        errorRecord,
+                                        createThrow(
+                                            createPropertyAccess(errorRecord, "error")
+                                        )
+                                    ),
+                                    EmitFlags.SingleLine
+                                )
+                            ]),
+                            EmitFlags.SingleLine
+                        )
+                    )
+                ])
+            );
+        }
+
+        function visitParameter(node: ParameterDeclaration): ParameterDeclaration {
+            if (node.transformFlags & TransformFlags.ContainsObjectRest) {
+                // Binding patterns are converted into a generated name and are
+                // evaluated inside the function body.
+                return updateParameter(
+                    node,
+                    /*decorators*/ undefined,
+                    /*modifiers*/ undefined,
+                    node.dotDotDotToken,
+                    getGeneratedNameForNode(node),
+                    /*questionToken*/ undefined,
+                    /*type*/ undefined,
+                    visitNode(node.initializer, visitor, isExpression)
+                );
+            }
+            return visitEachChild(node, visitor, context);
+        }
+
+        function visitConstructorDeclaration(node: ConstructorDeclaration) {
+            const savedEnclosingFunctionFlags = enclosingFunctionFlags;
+            enclosingFunctionFlags = FunctionFlags.Normal;
+            const updated = updateConstructor(
+                node,
+                /*decorators*/ undefined,
+                node.modifiers,
+                visitParameterList(node.parameters, visitor, context),
+                transformFunctionBody(node)
+            );
+            enclosingFunctionFlags = savedEnclosingFunctionFlags;
+            return updated;
+        }
+
+        function visitGetAccessorDeclaration(node: GetAccessorDeclaration) {
+            const savedEnclosingFunctionFlags = enclosingFunctionFlags;
+            enclosingFunctionFlags = FunctionFlags.Normal;
+            const updated = updateGetAccessor(
+                node,
+                /*decorators*/ undefined,
+                node.modifiers,
+                visitNode(node.name, visitor, isPropertyName),
+                visitParameterList(node.parameters, visitor, context),
+                /*type*/ undefined,
+                transformFunctionBody(node)
+            );
+            enclosingFunctionFlags = savedEnclosingFunctionFlags;
+            return updated;
+        }
+
+        function visitSetAccessorDeclaration(node: SetAccessorDeclaration) {
+            const savedEnclosingFunctionFlags = enclosingFunctionFlags;
+            enclosingFunctionFlags = FunctionFlags.Normal;
+            const updated = updateSetAccessor(
+                node,
+                /*decorators*/ undefined,
+                node.modifiers,
+                visitNode(node.name, visitor, isPropertyName),
+                visitParameterList(node.parameters, visitor, context),
+                transformFunctionBody(node)
+            );
+            enclosingFunctionFlags = savedEnclosingFunctionFlags;
+            return updated;
+        }
+
+        function visitMethodDeclaration(node: MethodDeclaration) {
+            const savedEnclosingFunctionFlags = enclosingFunctionFlags;
+            enclosingFunctionFlags = getFunctionFlags(node);
+            const updated = updateMethod(
+                node,
+                /*decorators*/ undefined,
+                enclosingFunctionFlags & FunctionFlags.Generator
+                    ? visitNodes(node.modifiers, visitorNoAsyncModifier, isModifier)
+                    : node.modifiers,
+                enclosingFunctionFlags & FunctionFlags.Async
+                    ? undefined
+                    : node.asteriskToken,
+                visitNode(node.name, visitor, isPropertyName),
+                visitNode(/*questionToken*/ undefined, visitor, isToken),
+                /*typeParameters*/ undefined,
+                visitParameterList(node.parameters, visitor, context),
+                /*type*/ undefined,
+                enclosingFunctionFlags & FunctionFlags.Async && enclosingFunctionFlags & FunctionFlags.Generator
+                    ? transformAsyncGeneratorFunctionBody(node)
+                    : transformFunctionBody(node)
+            );
+            enclosingFunctionFlags = savedEnclosingFunctionFlags;
+            return updated;
+        }
+
+        function visitFunctionDeclaration(node: FunctionDeclaration) {
+            const savedEnclosingFunctionFlags = enclosingFunctionFlags;
+            enclosingFunctionFlags = getFunctionFlags(node);
+            const updated = updateFunctionDeclaration(
+                node,
+                /*decorators*/ undefined,
+                enclosingFunctionFlags & FunctionFlags.Generator
+                    ? visitNodes(node.modifiers, visitorNoAsyncModifier, isModifier)
+                    : node.modifiers,
+                enclosingFunctionFlags & FunctionFlags.Async
+                    ? undefined
+                    : node.asteriskToken,
+                node.name,
+                /*typeParameters*/ undefined,
+                visitParameterList(node.parameters, visitor, context),
+                /*type*/ undefined,
+                enclosingFunctionFlags & FunctionFlags.Async && enclosingFunctionFlags & FunctionFlags.Generator
+                    ? transformAsyncGeneratorFunctionBody(node)
+                    : transformFunctionBody(node)
+            );
+            enclosingFunctionFlags = savedEnclosingFunctionFlags;
+            return updated;
+        }
+
+        function visitArrowFunction(node: ArrowFunction) {
+            const savedEnclosingFunctionFlags = enclosingFunctionFlags;
+            enclosingFunctionFlags = getFunctionFlags(node);
+            const updated = updateArrowFunction(
+                node,
+                node.modifiers,
+                /*typeParameters*/ undefined,
+                visitParameterList(node.parameters, visitor, context),
+                /*type*/ undefined,
+                transformFunctionBody(node)
+            );
+            enclosingFunctionFlags = savedEnclosingFunctionFlags;
+            return updated;
+        }
+
+        function visitFunctionExpression(node: FunctionExpression) {
+            const savedEnclosingFunctionFlags = enclosingFunctionFlags;
+            enclosingFunctionFlags = getFunctionFlags(node);
+            const updated = updateFunctionExpression(
+                node,
+                enclosingFunctionFlags & FunctionFlags.Generator
+                    ? visitNodes(node.modifiers, visitorNoAsyncModifier, isModifier)
+                    : node.modifiers,
+                enclosingFunctionFlags & FunctionFlags.Async
+                    ? undefined
+                    : node.asteriskToken,
+                node.name,
+                /*typeParameters*/ undefined,
+                visitParameterList(node.parameters, visitor, context),
+                /*type*/ undefined,
+                enclosingFunctionFlags & FunctionFlags.Async && enclosingFunctionFlags & FunctionFlags.Generator
+                    ? transformAsyncGeneratorFunctionBody(node)
+                    : transformFunctionBody(node)
+            );
+            enclosingFunctionFlags = savedEnclosingFunctionFlags;
+            return updated;
+        }
+
+        function transformAsyncGeneratorFunctionBody(node: MethodDeclaration | AccessorDeclaration | FunctionDeclaration | FunctionExpression): FunctionBody {
+            resumeLexicalEnvironment();
+            const statements: Statement[] = [];
+            const statementOffset = addPrologue(statements, node.body.statements, /*ensureUseStrict*/ false, visitor);
+            appendObjectRestAssignmentsIfNeeded(statements, node);
+
+            statements.push(
+                createReturn(
+                    createAsyncGeneratorHelper(
+                        context,
+                        createFunctionExpression(
+                            /*modifiers*/ undefined,
+                            createToken(SyntaxKind.AsteriskToken),
+                            node.name && getGeneratedNameForNode(node.name),
+                            /*typeParameters*/ undefined,
+                            /*parameters*/ [],
+                            /*type*/ undefined,
+                            updateBlock(
+                                node.body,
+                                visitLexicalEnvironment(node.body.statements, visitor, context, statementOffset)
+                            )
+                        )
+                    )
+                )
+            );
+
+            addRange(statements, endLexicalEnvironment());
+            const block = updateBlock(node.body, statements);
+
+            // Minor optimization, emit `_super` helper to capture `super` access in an arrow.
+            // This step isn't needed if we eventually transform this to ES5.
+            if (languageVersion >= ScriptTarget.ES2015) {
+                if (resolver.getNodeCheckFlags(node) & NodeCheckFlags.AsyncMethodWithSuperBinding) {
+                    enableSubstitutionForAsyncMethodsWithSuper();
+                    addEmitHelper(block, advancedAsyncSuperHelper);
+                }
+                else if (resolver.getNodeCheckFlags(node) & NodeCheckFlags.AsyncMethodWithSuper) {
+                    enableSubstitutionForAsyncMethodsWithSuper();
+                    addEmitHelper(block, asyncSuperHelper);
+                }
+            }
+            return block;
+        }
+
+        function transformFunctionBody(node: FunctionDeclaration | FunctionExpression | ConstructorDeclaration | MethodDeclaration | AccessorDeclaration): FunctionBody;
+        function transformFunctionBody(node: ArrowFunction): ConciseBody;
+        function transformFunctionBody(node: FunctionLikeDeclaration): ConciseBody {
+            resumeLexicalEnvironment();
+            let statementOffset = 0;
+            const statements: Statement[] = [];
+            const body = visitNode(node.body, visitor, isConciseBody);
+            if (isBlock(body)) {
+                statementOffset = addPrologue(statements, body.statements, /*ensureUseStrict*/ false, visitor);
+            }
+            addRange(statements, appendObjectRestAssignmentsIfNeeded(/*statements*/ undefined, node));
+            const trailingStatements = endLexicalEnvironment();
+            if (statementOffset > 0 || some(statements) || some(trailingStatements)) {
+                const block = convertToFunctionBody(body, /*multiLine*/ true);
+                addRange(statements, block.statements.slice(statementOffset));
+                addRange(statements, trailingStatements);
+                return updateBlock(block, setTextRange(createNodeArray(statements), block.statements));
+            }
+            return body;
+        }
+
+        function appendObjectRestAssignmentsIfNeeded(statements: Statement[], node: FunctionLikeDeclaration): Statement[] {
+            for (const parameter of node.parameters) {
+                if (parameter.transformFlags & TransformFlags.ContainsObjectRest) {
+                    const temp = getGeneratedNameForNode(parameter);
+                    const declarations = flattenDestructuringBinding(
+                        parameter,
+                        visitor,
+                        context,
+                        FlattenLevel.ObjectRest,
+                        temp,
+                        /*doNotRecordTempVariablesInLine*/ false,
+                        /*skipInitializer*/ true,
+                    );
+                    if (some(declarations)) {
+                        const statement = createVariableStatement(
+                            /*modifiers*/ undefined,
+                            createVariableDeclarationList(
+                                declarations
+                            )
+                        );
+                        setEmitFlags(statement, EmitFlags.CustomPrologue);
+                        statements = append(statements, statement);
+                    }
+                }
+            }
+            return statements;
+        }
+
+        function enableSubstitutionForAsyncMethodsWithSuper() {
+            if ((enabledSubstitutions & ESNextSubstitutionFlags.AsyncMethodsWithSuper) === 0) {
+                enabledSubstitutions |= ESNextSubstitutionFlags.AsyncMethodsWithSuper;
+
+                // We need to enable substitutions for call, property access, and element access
+                // if we need to rewrite super calls.
+                context.enableSubstitution(SyntaxKind.CallExpression);
+                context.enableSubstitution(SyntaxKind.PropertyAccessExpression);
+                context.enableSubstitution(SyntaxKind.ElementAccessExpression);
+
+                // We need to be notified when entering and exiting declarations that bind super.
+                context.enableEmitNotification(SyntaxKind.ClassDeclaration);
+                context.enableEmitNotification(SyntaxKind.MethodDeclaration);
+                context.enableEmitNotification(SyntaxKind.GetAccessor);
+                context.enableEmitNotification(SyntaxKind.SetAccessor);
+                context.enableEmitNotification(SyntaxKind.Constructor);
+            }
+        }
+
+        /**
+         * Called by the printer just before a node is printed.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to be printed.
+         * @param emitCallback The callback used to emit the node.
+         */
+        function onEmitNode(hint: EmitHint, node: Node, emitCallback: (hint: EmitHint, node: Node) => void) {
+            // If we need to support substitutions for `super` in an async method,
+            // we should track it here.
+            if (enabledSubstitutions & ESNextSubstitutionFlags.AsyncMethodsWithSuper && isSuperContainer(node)) {
+                const superContainerFlags = resolver.getNodeCheckFlags(node) & (NodeCheckFlags.AsyncMethodWithSuper | NodeCheckFlags.AsyncMethodWithSuperBinding);
+                if (superContainerFlags !== enclosingSuperContainerFlags) {
+                    const savedEnclosingSuperContainerFlags = enclosingSuperContainerFlags;
+                    enclosingSuperContainerFlags = superContainerFlags;
+                    previousOnEmitNode(hint, node, emitCallback);
+                    enclosingSuperContainerFlags = savedEnclosingSuperContainerFlags;
+                    return;
+                }
+            }
+
+            previousOnEmitNode(hint, node, emitCallback);
+        }
+
+        /**
+         * Hooks node substitutions.
+         *
+         * @param hint The context for the emitter.
+         * @param node The node to substitute.
+         */
+        function onSubstituteNode(hint: EmitHint, node: Node) {
+            node = previousOnSubstituteNode(hint, node);
+            if (hint === EmitHint.Expression && enclosingSuperContainerFlags) {
+                return substituteExpression(<Expression>node);
+            }
+            return node;
+        }
+
+        function substituteExpression(node: Expression) {
+            switch (node.kind) {
+                case SyntaxKind.PropertyAccessExpression:
+                    return substitutePropertyAccessExpression(<PropertyAccessExpression>node);
+                case SyntaxKind.ElementAccessExpression:
+                    return substituteElementAccessExpression(<ElementAccessExpression>node);
+                case SyntaxKind.CallExpression:
+                    return substituteCallExpression(<CallExpression>node);
+            }
+            return node;
+        }
+
+        function substitutePropertyAccessExpression(node: PropertyAccessExpression) {
+            if (node.expression.kind === SyntaxKind.SuperKeyword) {
+                return createSuperAccessInAsyncMethod(
+                    createLiteral(node.name.text),
+                    node
+                );
+            }
+            return node;
+        }
+
+        function substituteElementAccessExpression(node: ElementAccessExpression) {
+            if (node.expression.kind === SyntaxKind.SuperKeyword) {
+                return createSuperAccessInAsyncMethod(
+                    node.argumentExpression,
+                    node
+                );
+            }
+            return node;
+        }
+
+        function substituteCallExpression(node: CallExpression): Expression {
+            const expression = node.expression;
+            if (isSuperProperty(expression)) {
+                const argumentExpression = isPropertyAccessExpression(expression)
+                    ? substitutePropertyAccessExpression(expression)
+                    : substituteElementAccessExpression(expression);
+                return createCall(
+                    createPropertyAccess(argumentExpression, "call"),
+                    /*typeArguments*/ undefined,
+                    [
+                        createThis(),
+                        ...node.arguments
+                    ]
+                );
+            }
+            return node;
+        }
+
+        function isSuperContainer(node: Node) {
+            const kind = node.kind;
+            return kind === SyntaxKind.ClassDeclaration
+                || kind === SyntaxKind.Constructor
+                || kind === SyntaxKind.MethodDeclaration
+                || kind === SyntaxKind.GetAccessor
+                || kind === SyntaxKind.SetAccessor;
+        }
+
+        function createSuperAccessInAsyncMethod(argumentExpression: Expression, location: TextRange): LeftHandSideExpression {
+            if (enclosingSuperContainerFlags & NodeCheckFlags.AsyncMethodWithSuperBinding) {
+                return setTextRange(
+                    createPropertyAccess(
+                        createCall(
+                            createIdentifier("_super"),
+                            /*typeArguments*/ undefined,
+                            [argumentExpression]
+                        ),
+                        "value"
+                    ),
+                    location
+                );
+            }
+            else {
+                return setTextRange(
+                    createCall(
+                        createIdentifier("_super"),
+                        /*typeArguments*/ undefined,
+                        [argumentExpression]
+                    ),
+                    location
+                );
+            }
+        }
+    }
+
+    const assignHelper: EmitHelper = {
+        name: "typescript:assign",
+        scoped: false,
+        priority: 1,
+        text: `
+            var __assign = (this && this.__assign) || Object.assign || function(t) {
+                for (var s, i = 1, n = arguments.length; i < n; i++) {
+                    s = arguments[i];
+                    for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
+                        t[p] = s[p];
+                }
+                return t;
+            };`
+    };
+
+    export function createAssignHelper(context: TransformationContext, attributesSegments: Expression[]) {
+        if (context.getCompilerOptions().target >= ScriptTarget.ES2015) {
+            return createCall(createPropertyAccess(createIdentifier("Object"), "assign"),
+                              /*typeArguments*/ undefined,
+                              attributesSegments);
+        }
+        context.requestEmitHelper(assignHelper);
+        return createCall(
+            getHelperName("__assign"),
+            /*typeArguments*/ undefined,
+            attributesSegments
+        );
+    }
+
+    const awaitHelper: EmitHelper = {
+        name: "typescript:await",
+        scoped: false,
+        text: `
+            var __await = (this && this.__await) || function (v) { return this instanceof __await ? (this.v = v, this) : new __await(v); }
+        `
+    };
+
+    function createAwaitHelper(context: TransformationContext, expression: Expression) {
+        context.requestEmitHelper(awaitHelper);
+        return createCall(getHelperName("__await"), /*typeArguments*/ undefined, [expression]);
+    }
+
+    const asyncGeneratorHelper: EmitHelper = {
+        name: "typescript:asyncGenerator",
+        scoped: false,
+        text: `
+            var __asyncGenerator = (this && this.__asyncGenerator) || function (thisArg, _arguments, generator) {
+                if (!Symbol.asyncIterator) throw new TypeError("Symbol.asyncIterator is not defined.");
+                var g = generator.apply(thisArg, _arguments || []), i, q = [];
+                return i = {}, verb("next"), verb("throw"), verb("return"), i[Symbol.asyncIterator] = function () { return this; }, i;
+                function verb(n) { if (g[n]) i[n] = function (v) { return new Promise(function (a, b) { q.push([n, v, a, b]) > 1 || resume(n, v); }); }; }
+                function resume(n, v) { try { step(g[n](v)); } catch (e) { settle(q[0][3], e); } }
+                function step(r) { r.value instanceof __await ? Promise.resolve(r.value.v).then(fulfill, reject) : settle(q[0][2], r);  }
+                function fulfill(value) { resume("next", value); }
+                function reject(value) { resume("throw", value); }
+                function settle(f, v) { if (f(v), q.shift(), q.length) resume(q[0][0], q[0][1]); }
+            };
+        `
+    };
+
+    function createAsyncGeneratorHelper(context: TransformationContext, generatorFunc: FunctionExpression) {
+        context.requestEmitHelper(awaitHelper);
+        context.requestEmitHelper(asyncGeneratorHelper);
+
+        // Mark this node as originally an async function
+        (generatorFunc.emitNode || (generatorFunc.emitNode = {})).flags |= EmitFlags.AsyncFunctionBody;
+
+        return createCall(
+            getHelperName("__asyncGenerator"),
+            /*typeArguments*/ undefined,
+            [
+                createThis(),
+                createIdentifier("arguments"),
+                generatorFunc
+            ]
+        );
+    }
+
+    const asyncDelegator: EmitHelper = {
+        name: "typescript:asyncDelegator",
+        scoped: false,
+        text: `
+            var __asyncDelegator = (this && this.__asyncDelegator) || function (o) {
+                var i, p;
+                return i = {}, verb("next"), verb("throw", function (e) { throw e; }), verb("return"), i[Symbol.iterator] = function () { return this; }, i;
+                function verb(n, f) { if (o[n]) i[n] = function (v) { return (p = !p) ? { value: __await(o[n](v)), done: n === "return" } : f ? f(v) : v; }; }
+            };
+        `
+    };
+
+    function createAsyncDelegatorHelper(context: TransformationContext, expression: Expression, location?: TextRange) {
+        context.requestEmitHelper(awaitHelper);
+        context.requestEmitHelper(asyncDelegator);
+        return setTextRange(
+            createCall(
+                getHelperName("__asyncDelegator"),
+                /*typeArguments*/ undefined,
+                [expression]
+            ),
+            location
+        );
+    }
+
+    const asyncValues: EmitHelper = {
+        name: "typescript:asyncValues",
+        scoped: false,
+        text: `
+            var __asyncValues = (this && this.__asyncIterator) || function (o) {
+                if (!Symbol.asyncIterator) throw new TypeError("Symbol.asyncIterator is not defined.");
+                var m = o[Symbol.asyncIterator];
+                return m ? m.call(o) : typeof __values === "function" ? __values(o) : o[Symbol.iterator]();
+            };
+        `
+    };
+
+    function createAsyncValuesHelper(context: TransformationContext, expression: Expression, location?: TextRange) {
+        context.requestEmitHelper(asyncValues);
+        return setTextRange(
+            createCall(
+                getHelperName("__asyncValues"),
+                /*typeArguments*/ undefined,
+                [expression]
+            ),
+            location
+        );
+    }
+}
diff --git a/src/compiler/transformers/generators.ts b/src/compiler/transformers/generators.ts
index 6fe3187..d0049e7 100644
--- a/src/compiler/transformers/generators.ts
+++ b/src/compiler/transformers/generators.ts
@@ -217,20 +217,22 @@ namespace ts {
         Endfinally = 7,
     }
 
-    const instructionNames = createMap<string>({
-        [Instruction.Return]: "return",
-        [Instruction.Break]: "break",
-        [Instruction.Yield]: "yield",
-        [Instruction.YieldStar]: "yield*",
-        [Instruction.Endfinally]: "endfinally",
-    });
+    function getInstructionName(instruction: Instruction): string {
+        switch (instruction) {
+            case Instruction.Return: return "return";
+            case Instruction.Break: return "break";
+            case Instruction.Yield: return "yield";
+            case Instruction.YieldStar: return "yield*";
+            case Instruction.Endfinally: return "endfinally";
+        }
+    }
 
     export function transformGenerators(context: TransformationContext) {
         const {
-            startLexicalEnvironment,
+            resumeLexicalEnvironment,
             endLexicalEnvironment,
             hoistFunctionDeclaration,
-            hoistVariableDeclaration,
+            hoistVariableDeclaration
         } = context;
 
         const compilerOptions = context.getCompilerOptions();
@@ -241,7 +243,7 @@ namespace ts {
 
         let currentSourceFile: SourceFile;
         let renamedCatchVariables: Map<boolean>;
-        let renamedCatchVariableDeclarations: Map<Identifier>;
+        let renamedCatchVariableDeclarations: Identifier[];
 
         let inGeneratorFunctionBody: boolean;
         let inStatementContainingYield: boolean;
@@ -291,17 +293,17 @@ namespace ts {
         return transformSourceFile;
 
         function transformSourceFile(node: SourceFile) {
-            if (isDeclarationFile(node)) {
+            if (node.isDeclarationFile || (node.transformFlags & TransformFlags.ContainsGenerator) === 0) {
                 return node;
             }
 
-            if (node.transformFlags & TransformFlags.ContainsGenerator) {
-                currentSourceFile = node;
-                node = visitEachChild(node, visitor, context);
-                currentSourceFile = undefined;
-            }
+            currentSourceFile = node;
 
-            return node;
+            const visited = visitEachChild(node, visitor, context);
+            addEmitHelpers(visited, context.readEmitHelpers());
+
+            currentSourceFile = undefined;
+            return visited;
         }
 
         /**
@@ -445,17 +447,19 @@ namespace ts {
          */
         function visitFunctionDeclaration(node: FunctionDeclaration): Statement {
             // Currently, we only support generators that were originally async functions.
-            if (node.asteriskToken && getEmitFlags(node) & EmitFlags.AsyncFunctionBody) {
+            if (node.asteriskToken) {
                 node = setOriginalNode(
-                    createFunctionDeclaration(
-                        /*decorators*/ undefined,
-                        /*modifiers*/ undefined,
-                        /*asteriskToken*/ undefined,
-                        node.name,
-                        /*typeParameters*/ undefined,
-                        node.parameters,
-                        /*type*/ undefined,
-                        transformGeneratorFunctionBody(node.body),
+                    setTextRange(
+                        createFunctionDeclaration(
+                            /*decorators*/ undefined,
+                            node.modifiers,
+                            /*asteriskToken*/ undefined,
+                            node.name,
+                            /*typeParameters*/ undefined,
+                            visitParameterList(node.parameters, visitor, context),
+                            /*type*/ undefined,
+                            transformGeneratorFunctionBody(node.body)
+                        ),
                         /*location*/ node
                     ),
                     node
@@ -493,15 +497,18 @@ namespace ts {
          */
         function visitFunctionExpression(node: FunctionExpression): Expression {
             // Currently, we only support generators that were originally async functions.
-            if (node.asteriskToken && getEmitFlags(node) & EmitFlags.AsyncFunctionBody) {
+            if (node.asteriskToken) {
                 node = setOriginalNode(
-                    createFunctionExpression(
-                        /*asteriskToken*/ undefined,
-                        node.name,
-                        /*typeParameters*/ undefined,
-                        node.parameters,
-                        /*type*/ undefined,
-                        transformGeneratorFunctionBody(node.body),
+                    setTextRange(
+                        createFunctionExpression(
+                            /*modifiers*/ undefined,
+                            /*asteriskToken*/ undefined,
+                            node.name,
+                            /*typeParameters*/ undefined,
+                            visitParameterList(node.parameters, visitor, context),
+                            /*type*/ undefined,
+                            transformGeneratorFunctionBody(node.body)
+                        ),
                         /*location*/ node
                     ),
                     node
@@ -528,7 +535,7 @@ namespace ts {
          *
          * @param node The node to visit.
          */
-        function visitAccessorDeclaration(node: GetAccessorDeclaration) {
+        function visitAccessorDeclaration(node: AccessorDeclaration) {
             const savedInGeneratorFunctionBody = inGeneratorFunctionBody;
             const savedInStatementContainingYield = inStatementContainingYield;
             inGeneratorFunctionBody = false;
@@ -552,6 +559,7 @@ namespace ts {
             const savedBlocks = blocks;
             const savedBlockOffsets = blockOffsets;
             const savedBlockActions = blockActions;
+            const savedBlockStack = blockStack;
             const savedLabelOffsets = labelOffsets;
             const savedLabelExpressions = labelExpressions;
             const savedNextLabelId = nextLabelId;
@@ -566,6 +574,7 @@ namespace ts {
             blocks = undefined;
             blockOffsets = undefined;
             blockActions = undefined;
+            blockStack = undefined;
             labelOffsets = undefined;
             labelExpressions = undefined;
             nextLabelId = 1;
@@ -575,9 +584,9 @@ namespace ts {
             state = createTempVariable(/*recordTempVariable*/ undefined);
 
             // Build the generator
-            startLexicalEnvironment();
+            resumeLexicalEnvironment();
 
-            const statementOffset = addPrologueDirectives(statements, body.statements, /*ensureUseStrict*/ false, visitor);
+            const statementOffset = addPrologue(statements, body.statements, /*ensureUseStrict*/ false, visitor);
 
             transformAndEmitStatements(body.statements, statementOffset);
 
@@ -591,6 +600,7 @@ namespace ts {
             blocks = savedBlocks;
             blockOffsets = savedBlockOffsets;
             blockActions = savedBlockActions;
+            blockStack = savedBlockStack;
             labelOffsets = savedLabelOffsets;
             labelExpressions = savedLabelExpressions;
             nextLabelId = savedNextLabelId;
@@ -599,7 +609,7 @@ namespace ts {
             operationLocations = savedOperationLocations;
             state = savedState;
 
-            return createBlock(statements, /*location*/ body, body.multiLine);
+            return setTextRange(createBlock(statements, body.multiLine), body);
         }
 
         /**
@@ -630,10 +640,13 @@ namespace ts {
                     return undefined;
                 }
 
-                return createStatement(
-                    inlineExpressions(
-                        map(variables, transformInitializedVariable)
-                    )
+                return setSourceMapRange(
+                    createStatement(
+                        inlineExpressions(
+                            map(variables, transformInitializedVariable)
+                        )
+                    ),
+                    node
                 );
             }
         }
@@ -657,12 +670,12 @@ namespace ts {
             }
         }
 
-        function isCompoundAssignment(kind: SyntaxKind) {
+        function isCompoundAssignment(kind: BinaryOperator): kind is CompoundAssignmentOperator {
             return kind >= SyntaxKind.FirstCompoundAssignment
                 && kind <= SyntaxKind.LastCompoundAssignment;
         }
 
-        function getOperatorForCompoundAssignment(kind: SyntaxKind) {
+        function getOperatorForCompoundAssignment(kind: CompoundAssignmentOperator): BitwiseOperatorOrHigher {
             switch (kind) {
                 case SyntaxKind.PlusEqualsToken: return SyntaxKind.PlusToken;
                 case SyntaxKind.MinusEqualsToken: return SyntaxKind.MinusToken;
@@ -732,14 +745,17 @@ namespace ts {
 
                 const operator = node.operatorToken.kind;
                 if (isCompoundAssignment(operator)) {
-                    return createBinary(
-                        target,
-                        SyntaxKind.EqualsToken,
-                        createBinary(
-                            cacheExpression(target),
-                            getOperatorForCompoundAssignment(operator),
-                            visitNode(right, visitor, isExpression),
-                            node
+                    return setTextRange(
+                        createAssignment(
+                            target,
+                            setTextRange(
+                                createBinary(
+                                    cacheExpression(target),
+                                    getOperatorForCompoundAssignment(operator),
+                                    visitNode(right, visitor, isExpression)
+                                ),
+                                node
+                            )
                         ),
                         node
                     );
@@ -922,18 +938,20 @@ namespace ts {
             //  .mark resumeLabel
             //      x = %sent%;
 
-            // NOTE: we are explicitly not handling YieldStar at this time.
             const resumeLabel = defineLabel();
             const expression = visitNode(node.expression, visitor, isExpression);
             if (node.asteriskToken) {
-                emitYieldStar(expression, /*location*/ node);
+                const iterator = (getEmitFlags(node.expression) & EmitFlags.Iterator) === 0
+                    ? createValuesHelper(context, expression, /*location*/ node)
+                    : expression;
+                emitYieldStar(iterator, /*location*/ node);
             }
             else {
                 emitYield(expression, /*location*/ node);
             }
 
             markLabel(resumeLabel);
-            return createGeneratorResume();
+            return createGeneratorResume(/*location*/ node);
         }
 
         /**
@@ -942,7 +960,7 @@ namespace ts {
          * @param node The node to visit.
          */
         function visitArrayLiteralExpression(node: ArrayLiteralExpression) {
-            return visitElements(node.elements, node.multiLine);
+            return visitElements(node.elements, /*leadingElement*/ undefined, /*location*/ undefined, node.multiLine);
         }
 
         /**
@@ -952,7 +970,7 @@ namespace ts {
          * @param elements The elements to visit.
          * @param multiLine Whether array literals created should be emitted on multiple lines.
          */
-        function visitElements(elements: NodeArray<Expression>, multiLine: boolean) {
+        function visitElements(elements: NodeArray<Expression>, leadingElement?: Expression, location?: TextRange, multiLine?: boolean) {
             // [source]
             //      ar = [1, yield, 2];
             //
@@ -964,34 +982,49 @@ namespace ts {
             //      ar = _a.concat([%sent%, 2]);
 
             const numInitialElements = countInitialNodesWithoutYield(elements);
-            const temp = declareLocal();
-            let hasAssignedTemp = false;
+
+            let temp: Identifier;
             if (numInitialElements > 0) {
+                temp = declareLocal();
+                const initialElements = visitNodes(elements, visitor, isExpression, 0, numInitialElements);
                 emitAssignment(temp,
                     createArrayLiteral(
-                        visitNodes(elements, visitor, isExpression, 0, numInitialElements)
+                        leadingElement
+                            ? [leadingElement, ...initialElements]
+                            : initialElements
                     )
                 );
-                hasAssignedTemp = true;
+                leadingElement = undefined;
             }
 
             const expressions = reduceLeft(elements, reduceElement, <Expression[]>[], numInitialElements);
-            return hasAssignedTemp
-                ? createArrayConcat(temp, [createArrayLiteral(expressions)])
-                : createArrayLiteral(expressions);
+            return temp
+                ? createArrayConcat(temp, [createArrayLiteral(expressions, multiLine)])
+                : setTextRange(
+                    createArrayLiteral(leadingElement ? [leadingElement, ...expressions] : expressions, multiLine),
+                    location
+                );
 
             function reduceElement(expressions: Expression[], element: Expression) {
                 if (containsYield(element) && expressions.length > 0) {
+                    const hasAssignedTemp = temp !== undefined;
+                    if (!temp) {
+                        temp = declareLocal();
+                    }
+
                     emitAssignment(
                         temp,
                         hasAssignedTemp
                             ? createArrayConcat(
                                 temp,
-                                [createArrayLiteral(expressions)]
+                                [createArrayLiteral(expressions, multiLine)]
+                            )
+                            : createArrayLiteral(
+                                leadingElement ? [leadingElement, ...expressions] : expressions,
+                                multiLine
                             )
-                            : createArrayLiteral(expressions)
                     );
-                    hasAssignedTemp = true;
+                    leadingElement = undefined;
                     expressions = [];
                 }
 
@@ -1027,7 +1060,6 @@ namespace ts {
             emitAssignment(temp,
                 createObjectLiteral(
                     visitNodes(properties, visitor, isObjectLiteralElementLike, 0, numInitialProperties),
-                    /*location*/ undefined,
                     multiLine
                 )
             );
@@ -1098,7 +1130,7 @@ namespace ts {
                     createFunctionApply(
                         cacheExpression(visitNode(target, visitor, isLeftHandSideExpression)),
                         thisArg,
-                        visitElements(node.arguments, /*multiLine*/ false),
+                        visitElements(node.arguments),
                         /*location*/ node
                     ),
                     node
@@ -1123,15 +1155,20 @@ namespace ts {
 
                 const { target, thisArg } = createCallBinding(createPropertyAccess(node.expression, "bind"), hoistVariableDeclaration);
                 return setOriginalNode(
-                    createNew(
-                        createFunctionApply(
-                            cacheExpression(visitNode(target, visitor, isExpression)),
-                            thisArg,
-                            visitElements(node.arguments, /*multiLine*/ false)
+                    setTextRange(
+                        createNew(
+                            createFunctionApply(
+                                cacheExpression(visitNode(target, visitor, isExpression)),
+                                thisArg,
+                                visitElements(
+                                    node.arguments,
+                                    /*leadingElement*/ createVoidZero()
+                                )
+                            ),
+                            /*typeArguments*/ undefined,
+                            []
                         ),
-                        /*typeArguments*/ undefined,
-                        [],
-                        /*location*/ node
+                        node
                     ),
                     node
                 );
@@ -1198,7 +1235,7 @@ namespace ts {
                 case SyntaxKind.TryStatement:
                     return transformAndEmitTryStatement(<TryStatement>node);
                 default:
-                    return emitStatement(visitNode(node, visitor, isStatement, /*optional*/ true));
+                    return emitStatement(visitNode(node, visitor, isStatement));
             }
         }
 
@@ -1217,7 +1254,9 @@ namespace ts {
 
         function transformAndEmitVariableDeclarationList(node: VariableDeclarationList): VariableDeclarationList {
             for (const variable of node.declarations) {
-                hoistVariableDeclaration(<Identifier>variable.name);
+                const name = getSynthesizedClone(<Identifier>variable.name);
+                setCommentRange(name, variable.name);
+                hoistVariableDeclaration(name);
             }
 
             const variables = getInitializedVariables(node);
@@ -1245,9 +1284,12 @@ namespace ts {
         }
 
         function transformInitializedVariable(node: VariableDeclaration) {
-            return createAssignment(
-                <Identifier>getSynthesizedClone(node.name),
-                visitNode(node.initializer, visitor, isExpression)
+            return setSourceMapRange(
+                createAssignment(
+                    setSourceMapRange(<Identifier>getSynthesizedClone(node.name), node.name),
+                    visitNode(node.initializer, visitor, isExpression)
+                ),
+                node
             );
         }
 
@@ -1270,7 +1312,7 @@ namespace ts {
                 if (containsYield(node.thenStatement) || containsYield(node.elseStatement)) {
                     const endLabel = defineLabel();
                     const elseLabel = node.elseStatement ? defineLabel() : undefined;
-                    emitBreakWhenFalse(node.elseStatement ? elseLabel : endLabel, visitNode(node.expression, visitor, isExpression));
+                    emitBreakWhenFalse(node.elseStatement ? elseLabel : endLabel, visitNode(node.expression, visitor, isExpression), /*location*/ node.expression);
                     transformAndEmitEmbeddedStatement(node.thenStatement);
                     if (node.elseStatement) {
                         emitBreak(endLabel);
@@ -1402,9 +1444,11 @@ namespace ts {
                     }
                     else {
                         emitStatement(
-                            createStatement(
-                                visitNode(initializer, visitor, isExpression),
-                                /*location*/ initializer
+                            setTextRange(
+                                createStatement(
+                                    visitNode(initializer, visitor, isExpression)
+                                ),
+                                initializer
                             )
                         );
                     }
@@ -1420,9 +1464,11 @@ namespace ts {
                 markLabel(incrementLabel);
                 if (node.incrementor) {
                     emitStatement(
-                        createStatement(
-                            visitNode(node.incrementor, visitor, isExpression),
-                            /*location*/ node.incrementor
+                        setTextRange(
+                            createStatement(
+                                visitNode(node.incrementor, visitor, isExpression)
+                            ),
+                            node.incrementor
                         )
                     );
                 }
@@ -1440,7 +1486,7 @@ namespace ts {
             }
 
             const initializer = node.initializer;
-            if (isVariableDeclarationList(initializer)) {
+            if (initializer && isVariableDeclarationList(initializer)) {
                 for (const variable of initializer.declarations) {
                     hoistVariableDeclaration(<Identifier>variable.name);
                 }
@@ -1450,9 +1496,9 @@ namespace ts {
                     variables.length > 0
                         ? inlineExpressions(map(variables, transformInitializedVariable))
                         : undefined,
-                    visitNode(node.condition, visitor, isExpression, /*optional*/ true),
-                    visitNode(node.incrementor, visitor, isExpression, /*optional*/ true),
-                    visitNode(node.statement, visitor, isStatement, /*optional*/ false, liftToBlock)
+                    visitNode(node.condition, visitor, isExpression),
+                    visitNode(node.incrementor, visitor, isExpression),
+                    visitNode(node.statement, visitor, isStatement, liftToBlock)
                 );
             }
             else {
@@ -1574,7 +1620,7 @@ namespace ts {
                 node = updateForIn(node,
                     <Identifier>initializer.declarations[0].name,
                     visitNode(node.expression, visitor, isExpression),
-                    visitNode(node.statement, visitor, isStatement, /*optional*/ false, liftToBlock)
+                    visitNode(node.statement, visitor, isStatement, liftToBlock)
                 );
             }
             else {
@@ -1624,14 +1670,14 @@ namespace ts {
 
         function transformAndEmitReturnStatement(node: ReturnStatement): void {
             emitReturn(
-                visitNode(node.expression, visitor, isExpression, /*optional*/ true),
+                visitNode(node.expression, visitor, isExpression),
                 /*location*/ node
             );
         }
 
         function visitReturnStatement(node: ReturnStatement) {
             return createInlineReturn(
-                visitNode(node.expression, visitor, isExpression, /*optional*/ true),
+                visitNode(node.expression, visitor, isExpression),
                 /*location*/ node
             );
         }
@@ -1888,9 +1934,9 @@ namespace ts {
             return -1;
         }
 
-        function onSubstituteNode(emitContext: EmitContext, node: Node): Node {
-            node = previousOnSubstituteNode(emitContext, node);
-            if (emitContext === EmitContext.Expression) {
+        function onSubstituteNode(hint: EmitHint, node: Node): Node {
+            node = previousOnSubstituteNode(hint, node);
+            if (hint === EmitHint.Expression) {
                 return substituteExpression(<Expression>node);
             }
             return node;
@@ -1904,12 +1950,12 @@ namespace ts {
         }
 
         function substituteExpressionIdentifier(node: Identifier) {
-            if (renamedCatchVariables && hasProperty(renamedCatchVariables, node.text)) {
+            if (!isGeneratedIdentifier(node) && renamedCatchVariables && renamedCatchVariables.has(node.text)) {
                 const original = getOriginalNode(node);
                 if (isIdentifier(original) && original.parent) {
                     const declaration = resolver.getReferencedValueDeclaration(original);
                     if (declaration) {
-                        const name = getProperty(renamedCatchVariableDeclarations, String(getOriginalNodeId(declaration)));
+                        const name = renamedCatchVariableDeclarations[getOriginalNodeId(declaration)];
                         if (name) {
                             const clone = getMutableClone(name);
                             setSourceMapRange(clone, node);
@@ -1925,7 +1971,7 @@ namespace ts {
 
         function cacheExpression(node: Expression): Identifier {
             let temp: Identifier;
-            if (isGeneratedIdentifier(node)) {
+            if (isGeneratedIdentifier(node) || getEmitFlags(node) & EmitFlags.HelperName) {
                 return <Identifier>node;
             }
 
@@ -2070,17 +2116,24 @@ namespace ts {
         function beginCatchBlock(variable: VariableDeclaration): void {
             Debug.assert(peekBlockKind() === CodeBlockKind.Exception);
 
-            const text = (<Identifier>variable.name).text;
-            const name = declareLocal(text);
-
-            if (!renamedCatchVariables) {
-                renamedCatchVariables = createMap<boolean>();
-                renamedCatchVariableDeclarations = createMap<Identifier>();
-                context.enableSubstitution(SyntaxKind.Identifier);
+            // generated identifiers should already be unique within a file
+            let name: Identifier;
+            if (isGeneratedIdentifier(variable.name)) {
+                name = variable.name;
+                hoistVariableDeclaration(variable.name);
             }
+            else {
+                const text = (<Identifier>variable.name).text;
+                name = declareLocal(text);
+                if (!renamedCatchVariables) {
+                    renamedCatchVariables = createMap<boolean>();
+                    renamedCatchVariableDeclarations = [];
+                    context.enableSubstitution(SyntaxKind.Identifier);
+                }
 
-            renamedCatchVariables[text] = true;
-            renamedCatchVariableDeclarations[getOriginalNodeId(variable)] = name;
+                renamedCatchVariables.set(text, true);
+                renamedCatchVariableDeclarations[getOriginalNodeId(variable)] = name;
+            }
 
             const exception = <ExceptionBlock>peekBlock();
             Debug.assert(exception.state < ExceptionBlockState.Catch);
@@ -2365,7 +2418,7 @@ namespace ts {
                     labelExpressions = [];
                 }
 
-                const expression = <LiteralExpression>createSynthesizedNode(SyntaxKind.NumericLiteral);
+                const expression = createLiteral(-1);
                 if (labelExpressions[label] === undefined) {
                     labelExpressions[label] = [expression];
                 }
@@ -2376,7 +2429,7 @@ namespace ts {
                 return expression;
             }
 
-            return <OmittedExpression>createNode(SyntaxKind.OmittedExpression);
+            return createOmittedExpression();
         }
 
         /**
@@ -2384,7 +2437,7 @@ namespace ts {
          */
         function createInstruction(instruction: Instruction): NumericLiteral {
             const literal = createLiteral(instruction);
-            literal.trailingComment = instructionNames[instruction];
+            addSyntheticTrailingComment(literal, SyntaxKind.MultiLineCommentTrivia, getInstructionName(instruction));
             return literal;
         }
 
@@ -2396,11 +2449,13 @@ namespace ts {
          */
         function createInlineBreak(label: Label, location?: TextRange): ReturnStatement {
             Debug.assert(label > 0, `Invalid label: ${label}`);
-            return createReturn(
-                createArrayLiteral([
-                    createInstruction(Instruction.Break),
-                    createLabel(label)
-                ]),
+            return setTextRange(
+                createReturn(
+                    createArrayLiteral([
+                        createInstruction(Instruction.Break),
+                        createLabel(label)
+                    ])
+                ),
                 location
             );
         }
@@ -2412,10 +2467,12 @@ namespace ts {
          * @param location An optional source map location for the statement.
          */
         function createInlineReturn(expression?: Expression, location?: TextRange): ReturnStatement {
-            return createReturn(
-                createArrayLiteral(expression
-                    ? [createInstruction(Instruction.Return), expression]
-                    : [createInstruction(Instruction.Return)]
+            return setTextRange(
+                createReturn(
+                    createArrayLiteral(expression
+                        ? [createInstruction(Instruction.Return), expression]
+                        : [createInstruction(Instruction.Return)]
+                    )
                 ),
                 location
             );
@@ -2425,7 +2482,14 @@ namespace ts {
          * Creates an expression that can be used to resume from a Yield operation.
          */
         function createGeneratorResume(location?: TextRange): LeftHandSideExpression {
-            return createCall(createPropertyAccess(state, "sent"), /*typeArguments*/ undefined, [], location);
+            return setTextRange(
+                createCall(
+                    createPropertyAccess(state, "sent"),
+                    /*typeArguments*/ undefined,
+                    []
+                ),
+                location
+            );
         }
 
         /**
@@ -2581,27 +2645,23 @@ namespace ts {
             withBlockStack = undefined;
 
             const buildResult = buildStatements();
-            return createCall(
-                createHelperName(currentSourceFile.externalHelpersModuleName, "__generator"),
-                /*typeArguments*/ undefined,
-                [
-                    createThis(),
-                    setEmitFlags(
-                        createFunctionExpression(
-                            /*asteriskToken*/ undefined,
-                            /*name*/ undefined,
-                            /*typeParameters*/ undefined,
-                            [createParameter(state)],
-                            /*type*/ undefined,
-                            createBlock(
-                                buildResult,
-                                /*location*/ undefined,
-                                /*multiLine*/ buildResult.length > 0
-                            )
-                        ),
-                        EmitFlags.ReuseTempVariableScope
-                    )
-                ]
+            return createGeneratorHelper(
+                context,
+                setEmitFlags(
+                    createFunctionExpression(
+                        /*modifiers*/ undefined,
+                        /*asteriskToken*/ undefined,
+                        /*name*/ undefined,
+                        /*typeParameters*/ undefined,
+                        [createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, state)],
+                        /*type*/ undefined,
+                        createBlock(
+                            buildResult,
+                            /*multiLine*/ buildResult.length > 0
+                        )
+                    ),
+                    EmitFlags.ReuseTempVariableScope
+                )
             );
         }
 
@@ -2926,7 +2986,7 @@ namespace ts {
          * @param operationLocation The source map location for the operation.
          */
         function writeAssign(left: Expression, right: Expression, operationLocation: TextRange): void {
-            writeStatement(createStatement(createAssignment(left, right), operationLocation));
+            writeStatement(setTextRange(createStatement(createAssignment(left, right)), operationLocation));
         }
 
         /**
@@ -2938,7 +2998,7 @@ namespace ts {
         function writeThrow(expression: Expression, operationLocation: TextRange): void {
             lastOperationWasAbrupt = true;
             lastOperationWasCompletion = true;
-            writeStatement(createThrow(expression, operationLocation));
+            writeStatement(setTextRange(createThrow(expression), operationLocation));
         }
 
         /**
@@ -2951,12 +3011,17 @@ namespace ts {
             lastOperationWasAbrupt = true;
             lastOperationWasCompletion = true;
             writeStatement(
-                createReturn(
-                    createArrayLiteral(expression
-                        ? [createInstruction(Instruction.Return), expression]
-                        : [createInstruction(Instruction.Return)]
+                setEmitFlags(
+                    setTextRange(
+                        createReturn(
+                            createArrayLiteral(expression
+                                ? [createInstruction(Instruction.Return), expression]
+                                : [createInstruction(Instruction.Return)]
+                            )
+                        ),
+                        operationLocation
                     ),
-                    operationLocation
+                    EmitFlags.NoTokenSourceMaps
                 )
             );
         }
@@ -2970,12 +3035,17 @@ namespace ts {
         function writeBreak(label: Label, operationLocation: TextRange): void {
             lastOperationWasAbrupt = true;
             writeStatement(
-                createReturn(
-                    createArrayLiteral([
-                        createInstruction(Instruction.Break),
-                        createLabel(label)
-                    ]),
-                    operationLocation
+                setEmitFlags(
+                    setTextRange(
+                        createReturn(
+                            createArrayLiteral([
+                                createInstruction(Instruction.Break),
+                                createLabel(label)
+                            ])
+                        ),
+                        operationLocation
+                    ),
+                    EmitFlags.NoTokenSourceMaps
                 )
             );
         }
@@ -2989,15 +3059,23 @@ namespace ts {
          */
         function writeBreakWhenTrue(label: Label, condition: Expression, operationLocation: TextRange): void {
             writeStatement(
-                createIf(
-                    condition,
-                    createReturn(
-                        createArrayLiteral([
-                            createInstruction(Instruction.Break),
-                            createLabel(label)
-                        ]),
-                        operationLocation
-                    )
+                setEmitFlags(
+                    createIf(
+                        condition,
+                        setEmitFlags(
+                            setTextRange(
+                                createReturn(
+                                    createArrayLiteral([
+                                        createInstruction(Instruction.Break),
+                                        createLabel(label)
+                                    ])
+                                ),
+                                operationLocation
+                            ),
+                            EmitFlags.NoTokenSourceMaps
+                        )
+                    ),
+                    EmitFlags.SingleLine
                 )
             );
         }
@@ -3011,15 +3089,23 @@ namespace ts {
          */
         function writeBreakWhenFalse(label: Label, condition: Expression, operationLocation: TextRange): void {
             writeStatement(
-                createIf(
-                    createLogicalNot(condition),
-                    createReturn(
-                        createArrayLiteral([
-                            createInstruction(Instruction.Break),
-                            createLabel(label)
-                        ]),
-                        operationLocation
-                    )
+                setEmitFlags(
+                    createIf(
+                        createLogicalNot(condition),
+                        setEmitFlags(
+                            setTextRange(
+                                createReturn(
+                                    createArrayLiteral([
+                                        createInstruction(Instruction.Break),
+                                        createLabel(label)
+                                    ])
+                                ),
+                                operationLocation
+                            ),
+                            EmitFlags.NoTokenSourceMaps
+                        )
+                    ),
+                    EmitFlags.SingleLine
                 )
             );
         }
@@ -3033,13 +3119,18 @@ namespace ts {
         function writeYield(expression: Expression, operationLocation: TextRange): void {
             lastOperationWasAbrupt = true;
             writeStatement(
-                createReturn(
-                    createArrayLiteral(
-                        expression
-                            ? [createInstruction(Instruction.Yield), expression]
-                            : [createInstruction(Instruction.Yield)]
+                setEmitFlags(
+                    setTextRange(
+                        createReturn(
+                            createArrayLiteral(
+                                expression
+                                    ? [createInstruction(Instruction.Yield), expression]
+                                    : [createInstruction(Instruction.Yield)]
+                            )
+                        ),
+                        operationLocation
                     ),
-                    operationLocation
+                    EmitFlags.NoTokenSourceMaps
                 )
             );
         }
@@ -3053,12 +3144,17 @@ namespace ts {
         function writeYieldStar(expression: Expression, operationLocation: TextRange): void {
             lastOperationWasAbrupt = true;
             writeStatement(
-                createReturn(
-                    createArrayLiteral([
-                        createInstruction(Instruction.YieldStar),
-                        expression
-                    ]),
-                    operationLocation
+                setEmitFlags(
+                    setTextRange(
+                        createReturn(
+                            createArrayLiteral([
+                                createInstruction(Instruction.YieldStar),
+                                expression
+                            ])
+                        ),
+                        operationLocation
+                    ),
+                    EmitFlags.NoTokenSourceMaps
                 )
             );
         }
@@ -3077,4 +3173,105 @@ namespace ts {
             );
         }
     }
-}
\ No newline at end of file
+
+    function createGeneratorHelper(context: TransformationContext, body: FunctionExpression) {
+        context.requestEmitHelper(generatorHelper);
+        return createCall(
+            getHelperName("__generator"),
+            /*typeArguments*/ undefined,
+            [createThis(), body]);
+    }
+
+    // The __generator helper is used by down-level transformations to emulate the runtime
+    // semantics of an ES2015 generator function. When called, this helper returns an
+    // object that implements the Iterator protocol, in that it has `next`, `return`, and
+    // `throw` methods that step through the generator when invoked.
+    //
+    // parameters:
+    //  thisArg  The value to use as the `this` binding for the transformed generator body.
+    //  body     A function that acts as the transformed generator body.
+    //
+    // variables:
+    //  _       Persistent state for the generator that is shared between the helper and the
+    //          generator body. The state object has the following members:
+    //            sent() - A method that returns or throws the current completion value.
+    //            label  - The next point at which to resume evaluation of the generator body.
+    //            trys   - A stack of protected regions (try/catch/finally blocks).
+    //            ops    - A stack of pending instructions when inside of a finally block.
+    //  f       A value indicating whether the generator is executing.
+    //  y       An iterator to delegate for a yield*.
+    //  t       A temporary variable that holds one of the following values (note that these
+    //          cases do not overlap):
+    //          - The completion value when resuming from a `yield` or `yield*`.
+    //          - The error value for a catch block.
+    //          - The current protected region (array of try/catch/finally/end labels).
+    //          - The verb (`next`, `throw`, or `return` method) to delegate to the expression
+    //            of a `yield*`.
+    //          - The result of evaluating the verb delegated to the expression of a `yield*`.
+    //
+    // functions:
+    //  verb(n)     Creates a bound callback to the `step` function for opcode `n`.
+    //  step(op)    Evaluates opcodes in a generator body until execution is suspended or
+    //              completed.
+    //
+    // The __generator helper understands a limited set of instructions:
+    //  0: next(value?)     - Start or resume the generator with the specified value.
+    //  1: throw(error)     - Resume the generator with an exception. If the generator is
+    //                        suspended inside of one or more protected regions, evaluates
+    //                        any intervening finally blocks between the current label and
+    //                        the nearest catch block or function boundary. If uncaught, the
+    //                        exception is thrown to the caller.
+    //  2: return(value?)   - Resume the generator as if with a return. If the generator is
+    //                        suspended inside of one or more protected regions, evaluates any
+    //                        intervening finally blocks.
+    //  3: break(label)     - Jump to the specified label. If the label is outside of the
+    //                        current protected region, evaluates any intervening finally
+    //                        blocks.
+    //  4: yield(value?)    - Yield execution to the caller with an optional value. When
+    //                        resumed, the generator will continue at the next label.
+    //  5: yield*(value)    - Delegates evaluation to the supplied iterator. When
+    //                        delegation completes, the generator will continue at the next
+    //                        label.
+    //  6: catch(error)     - Handles an exception thrown from within the generator body. If
+    //                        the current label is inside of one or more protected regions,
+    //                        evaluates any intervening finally blocks between the current
+    //                        label and the nearest catch block or function boundary. If
+    //                        uncaught, the exception is thrown to the caller.
+    //  7: endfinally       - Ends a finally block, resuming the last instruction prior to
+    //                        entering a finally block.
+    //
+    // For examples of how these are used, see the comments in ./transformers/generators.ts
+    const generatorHelper: EmitHelper = {
+        name: "typescript:generator",
+        scoped: false,
+        priority: 6,
+        text: `
+            var __generator = (this && this.__generator) || function (thisArg, body) {
+                var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
+                return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
+                function verb(n) { return function (v) { return step([n, v]); }; }
+                function step(op) {
+                    if (f) throw new TypeError("Generator is already executing.");
+                    while (_) try {
+                        if (f = 1, y && (t = y[op[0] & 2 ? "return" : op[0] ? "throw" : "next"]) && !(t = t.call(y, op[1])).done) return t;
+                        if (y = 0, t) op = [0, t.value];
+                        switch (op[0]) {
+                            case 0: case 1: t = op; break;
+                            case 4: _.label++; return { value: op[1], done: false };
+                            case 5: _.label++; y = op[1]; op = [0]; continue;
+                            case 7: op = _.ops.pop(); _.trys.pop(); continue;
+                            default:
+                                if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
+                                if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
+                                if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
+                                if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
+                                if (t[2]) _.ops.pop();
+                                _.trys.pop(); continue;
+                        }
+                        op = body.call(thisArg, _);
+                    } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
+                    if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
+                }
+            };`
+    };
+}
diff --git a/src/compiler/transformers/jsx.ts b/src/compiler/transformers/jsx.ts
index 95a4016..09f361d 100644
--- a/src/compiler/transformers/jsx.ts
+++ b/src/compiler/transformers/jsx.ts
@@ -1,13 +1,12 @@
 /// <reference path="../factory.ts" />
 /// <reference path="../visitor.ts" />
+/// <reference path="./esnext.ts" />
 
 /*@internal*/
 namespace ts {
-    const entities: Map<number> = createEntitiesMap();
-
     export function transformJsx(context: TransformationContext) {
         const compilerOptions = context.getCompilerOptions();
-        let currentSourceFile: SourceFile;
+
         return transformSourceFile;
 
         /**
@@ -16,23 +15,19 @@ namespace ts {
          * @param node A SourceFile node.
          */
         function transformSourceFile(node: SourceFile) {
-            if (isDeclarationFile(node)) {
+            if (node.isDeclarationFile) {
                 return node;
             }
 
-            currentSourceFile = node;
-            node = visitEachChild(node, visitor, context);
-            currentSourceFile = undefined;
-            return node;
+            const visited = visitEachChild(node, visitor, context);
+            addEmitHelpers(visited, context.readEmitHelpers());
+            return visited;
         }
 
         function visitor(node: Node): VisitResult<Node> {
-            if (node.transformFlags & TransformFlags.Jsx) {
+            if (node.transformFlags & TransformFlags.ContainsJsx) {
                 return visitorWorker(node);
             }
-            else if (node.transformFlags & TransformFlags.ContainsJsx) {
-                return visitEachChild(node, visitor, context);
-            }
             else {
                 return node;
             }
@@ -50,8 +45,7 @@ namespace ts {
                     return visitJsxExpression(<JsxExpression>node);
 
                 default:
-                    Debug.failBadSyntaxKind(node);
-                    return undefined;
+                    return visitEachChild(node, visitor, context);
             }
         }
 
@@ -86,7 +80,7 @@ namespace ts {
         function visitJsxOpeningLikeElement(node: JsxOpeningLikeElement, children: JsxChild[], isChild: boolean, location: TextRange) {
             const tagName = getTagName(node);
             let objectProperties: Expression;
-            const attrs = node.attributes;
+            const attrs = node.attributes.properties;
             if (attrs.length === 0) {
                 // When there are no attributes, React wants "null"
                 objectProperties = createNull();
@@ -109,11 +103,14 @@ namespace ts {
 
                 // Either emit one big object literal (no spread attribs), or
                 // a call to the __assign helper.
-                objectProperties = singleOrUndefined(segments)
-                    || createAssignHelper(currentSourceFile.externalHelpersModuleName, segments);
+                objectProperties = singleOrUndefined(segments);
+                if (!objectProperties) {
+                    objectProperties = createAssignHelper(context, segments);
+                }
             }
 
-            const element = createReactCreateElement(
+            const element = createExpressionForJsxElement(
+                context.getEmitResolver().getJsxFactoryEntity(),
                 compilerOptions.reactNamespace,
                 tagName,
                 objectProperties,
@@ -141,13 +138,16 @@ namespace ts {
 
         function transformJsxAttributeInitializer(node: StringLiteral | JsxExpression) {
             if (node === undefined) {
-                return createLiteral(true);
+                return createTrue();
             }
             else if (node.kind === SyntaxKind.StringLiteral) {
                 const decoded = tryDecodeEntities((<StringLiteral>node).text);
-                return decoded ? createLiteral(decoded, /*location*/ node) : node;
+                return decoded ? setTextRange(createLiteral(decoded), node) : node;
             }
             else if (node.kind === SyntaxKind.JsxExpression) {
+                if (node.expression === undefined) {
+                    return createTrue();
+                }
                 return visitJsxExpression(<JsxExpression>node);
             }
             else {
@@ -155,33 +155,50 @@ namespace ts {
             }
         }
 
-        function visitJsxText(node: JsxText) {
-            const text = getTextOfNode(node, /*includeTrivia*/ true);
-            let parts: Expression[];
+        function visitJsxText(node: JsxText): StringLiteral | undefined {
+            const fixed = fixupWhitespaceAndDecodeEntities(getTextOfNode(node, /*includeTrivia*/ true));
+            return fixed === undefined ? undefined : createLiteral(fixed);
+        }
+
+        /**
+         * JSX trims whitespace at the end and beginning of lines, except that the
+         * start/end of a tag is considered a start/end of a line only if that line is
+         * on the same line as the closing tag. See examples in
+         * tests/cases/conformance/jsx/tsxReactEmitWhitespace.tsx
+         * See also https://www.w3.org/TR/html4/struct/text.html#h-9.1 and https://www.w3.org/TR/CSS2/text.html#white-space-model
+         *
+         * An equivalent algorithm would be:
+         * - If there is only one line, return it.
+         * - If there is only whitespace (but multiple lines), return `undefined`.
+         * - Split the text into lines.
+         * - 'trimRight' the first line, 'trimLeft' the last line, 'trim' middle lines.
+         * - Decode entities on each line (individually).
+         * - Remove empty lines and join the rest with " ".
+         */
+        function fixupWhitespaceAndDecodeEntities(text: string): string | undefined {
+            let acc: string | undefined;
+            // First non-whitespace character on this line.
             let firstNonWhitespace = 0;
+            // Last non-whitespace character on this line.
             let lastNonWhitespace = -1;
+            // These initial values are special because the first line is:
+            // firstNonWhitespace = 0 to indicate that we want leading whitsepace,
+            // but lastNonWhitespace = -1 as a special flag to indicate that we *don't* include the line if it's all whitespace.
 
-            // JSX trims whitespace at the end and beginning of lines, except that the
-            // start/end of a tag is considered a start/end of a line only if that line is
-            // on the same line as the closing tag. See examples in
-            // tests/cases/conformance/jsx/tsxReactEmitWhitespace.tsx
             for (let i = 0; i < text.length; i++) {
                 const c = text.charCodeAt(i);
                 if (isLineBreak(c)) {
-                    if (firstNonWhitespace !== -1 && (lastNonWhitespace - firstNonWhitespace + 1 > 0)) {
-                        const part = text.substr(firstNonWhitespace, lastNonWhitespace - firstNonWhitespace + 1);
-                        if (!parts) {
-                            parts = [];
-                        }
-
-                        // We do not escape the string here as that is handled by the printer
-                        // when it emits the literal. We do, however, need to decode JSX entities.
-                        parts.push(createLiteral(decodeEntities(part)));
+                    // If we've seen any non-whitespace characters on this line, add the 'trim' of the line.
+                    // (lastNonWhitespace === -1 is a special flag to detect whether the first line is all whitespace.)
+                    if (firstNonWhitespace !== -1 && lastNonWhitespace !== -1) {
+                        acc = addLineOfJsxText(acc, text.substr(firstNonWhitespace, lastNonWhitespace - firstNonWhitespace + 1));
                     }
 
+                    // Reset firstNonWhitespace for the next line.
+                    // Don't bother to reset lastNonWhitespace because we ignore it if firstNonWhitespace = -1.
                     firstNonWhitespace = -1;
                 }
-                else if (!isWhiteSpace(c)) {
+                else if (!isWhiteSpaceSingleLine(c)) {
                     lastNonWhitespace = i;
                     if (firstNonWhitespace === -1) {
                         firstNonWhitespace = i;
@@ -189,29 +206,18 @@ namespace ts {
                 }
             }
 
-            if (firstNonWhitespace !== -1) {
-                const part = text.substr(firstNonWhitespace);
-                if (!parts) {
-                    parts = [];
-                }
-
-                // We do not escape the string here as that is handled by the printer
-                // when it emits the literal. We do, however, need to decode JSX entities.
-                parts.push(createLiteral(decodeEntities(part)));
-            }
-
-            if (parts) {
-                return reduceLeft(parts, aggregateJsxTextParts);
-            }
-
-            return undefined;
+            return firstNonWhitespace !== -1
+                // Last line had a non-whitespace character. Emit the 'trimLeft', meaning keep trailing whitespace.
+                ? addLineOfJsxText(acc, text.substr(firstNonWhitespace))
+                // Last line was all whitespace, so ignore it
+                : acc;
         }
 
-        /**
-         * Aggregates two expressions by interpolating them with a whitespace literal.
-         */
-        function aggregateJsxTextParts(left: Expression, right: Expression) {
-            return createAdd(createAdd(left, createLiteral(" ")), right);
+        function addLineOfJsxText(acc: string | undefined, trimmedLine: string): string {
+            // We do not escape the string here as that is handled by the printer
+            // when it emits the literal. We do, however, need to decode JSX entities.
+            const decoded = decodeEntities(trimmedLine);
+            return acc === undefined ? decoded : acc + " " + decoded;
         }
 
         /**
@@ -227,7 +233,7 @@ namespace ts {
                     return String.fromCharCode(parseInt(hex, 16));
                 }
                 else {
-                    const ch = entities[word];
+                    const ch = entities.get(word);
                     // If this is not a valid entity, then just use `match` (replace it with itself, i.e. don't replace)
                     return ch ? String.fromCharCode(ch) : match;
                 }
@@ -275,261 +281,259 @@ namespace ts {
         }
     }
 
-    function createEntitiesMap(): Map<number> {
-        return createMap<number>({
-            "quot": 0x0022,
-            "amp": 0x0026,
-            "apos": 0x0027,
-            "lt": 0x003C,
-            "gt": 0x003E,
-            "nbsp": 0x00A0,
-            "iexcl": 0x00A1,
-            "cent": 0x00A2,
-            "pound": 0x00A3,
-            "curren": 0x00A4,
-            "yen": 0x00A5,
-            "brvbar": 0x00A6,
-            "sect": 0x00A7,
-            "uml": 0x00A8,
-            "copy": 0x00A9,
-            "ordf": 0x00AA,
-            "laquo": 0x00AB,
-            "not": 0x00AC,
-            "shy": 0x00AD,
-            "reg": 0x00AE,
-            "macr": 0x00AF,
-            "deg": 0x00B0,
-            "plusmn": 0x00B1,
-            "sup2": 0x00B2,
-            "sup3": 0x00B3,
-            "acute": 0x00B4,
-            "micro": 0x00B5,
-            "para": 0x00B6,
-            "middot": 0x00B7,
-            "cedil": 0x00B8,
-            "sup1": 0x00B9,
-            "ordm": 0x00BA,
-            "raquo": 0x00BB,
-            "frac14": 0x00BC,
-            "frac12": 0x00BD,
-            "frac34": 0x00BE,
-            "iquest": 0x00BF,
-            "Agrave": 0x00C0,
-            "Aacute": 0x00C1,
-            "Acirc": 0x00C2,
-            "Atilde": 0x00C3,
-            "Auml": 0x00C4,
-            "Aring": 0x00C5,
-            "AElig": 0x00C6,
-            "Ccedil": 0x00C7,
-            "Egrave": 0x00C8,
-            "Eacute": 0x00C9,
-            "Ecirc": 0x00CA,
-            "Euml": 0x00CB,
-            "Igrave": 0x00CC,
-            "Iacute": 0x00CD,
-            "Icirc": 0x00CE,
-            "Iuml": 0x00CF,
-            "ETH": 0x00D0,
-            "Ntilde": 0x00D1,
-            "Ograve": 0x00D2,
-            "Oacute": 0x00D3,
-            "Ocirc": 0x00D4,
-            "Otilde": 0x00D5,
-            "Ouml": 0x00D6,
-            "times": 0x00D7,
-            "Oslash": 0x00D8,
-            "Ugrave": 0x00D9,
-            "Uacute": 0x00DA,
-            "Ucirc": 0x00DB,
-            "Uuml": 0x00DC,
-            "Yacute": 0x00DD,
-            "THORN": 0x00DE,
-            "szlig": 0x00DF,
-            "agrave": 0x00E0,
-            "aacute": 0x00E1,
-            "acirc": 0x00E2,
-            "atilde": 0x00E3,
-            "auml": 0x00E4,
-            "aring": 0x00E5,
-            "aelig": 0x00E6,
-            "ccedil": 0x00E7,
-            "egrave": 0x00E8,
-            "eacute": 0x00E9,
-            "ecirc": 0x00EA,
-            "euml": 0x00EB,
-            "igrave": 0x00EC,
-            "iacute": 0x00ED,
-            "icirc": 0x00EE,
-            "iuml": 0x00EF,
-            "eth": 0x00F0,
-            "ntilde": 0x00F1,
-            "ograve": 0x00F2,
-            "oacute": 0x00F3,
-            "ocirc": 0x00F4,
-            "otilde": 0x00F5,
-            "ouml": 0x00F6,
-            "divide": 0x00F7,
-            "oslash": 0x00F8,
-            "ugrave": 0x00F9,
-            "uacute": 0x00FA,
-            "ucirc": 0x00FB,
-            "uuml": 0x00FC,
-            "yacute": 0x00FD,
-            "thorn": 0x00FE,
-            "yuml": 0x00FF,
-            "OElig": 0x0152,
-            "oelig": 0x0153,
-            "Scaron": 0x0160,
-            "scaron": 0x0161,
-            "Yuml": 0x0178,
-            "fnof": 0x0192,
-            "circ": 0x02C6,
-            "tilde": 0x02DC,
-            "Alpha": 0x0391,
-            "Beta": 0x0392,
-            "Gamma": 0x0393,
-            "Delta": 0x0394,
-            "Epsilon": 0x0395,
-            "Zeta": 0x0396,
-            "Eta": 0x0397,
-            "Theta": 0x0398,
-            "Iota": 0x0399,
-            "Kappa": 0x039A,
-            "Lambda": 0x039B,
-            "Mu": 0x039C,
-            "Nu": 0x039D,
-            "Xi": 0x039E,
-            "Omicron": 0x039F,
-            "Pi": 0x03A0,
-            "Rho": 0x03A1,
-            "Sigma": 0x03A3,
-            "Tau": 0x03A4,
-            "Upsilon": 0x03A5,
-            "Phi": 0x03A6,
-            "Chi": 0x03A7,
-            "Psi": 0x03A8,
-            "Omega": 0x03A9,
-            "alpha": 0x03B1,
-            "beta": 0x03B2,
-            "gamma": 0x03B3,
-            "delta": 0x03B4,
-            "epsilon": 0x03B5,
-            "zeta": 0x03B6,
-            "eta": 0x03B7,
-            "theta": 0x03B8,
-            "iota": 0x03B9,
-            "kappa": 0x03BA,
-            "lambda": 0x03BB,
-            "mu": 0x03BC,
-            "nu": 0x03BD,
-            "xi": 0x03BE,
-            "omicron": 0x03BF,
-            "pi": 0x03C0,
-            "rho": 0x03C1,
-            "sigmaf": 0x03C2,
-            "sigma": 0x03C3,
-            "tau": 0x03C4,
-            "upsilon": 0x03C5,
-            "phi": 0x03C6,
-            "chi": 0x03C7,
-            "psi": 0x03C8,
-            "omega": 0x03C9,
-            "thetasym": 0x03D1,
-            "upsih": 0x03D2,
-            "piv": 0x03D6,
-            "ensp": 0x2002,
-            "emsp": 0x2003,
-            "thinsp": 0x2009,
-            "zwnj": 0x200C,
-            "zwj": 0x200D,
-            "lrm": 0x200E,
-            "rlm": 0x200F,
-            "ndash": 0x2013,
-            "mdash": 0x2014,
-            "lsquo": 0x2018,
-            "rsquo": 0x2019,
-            "sbquo": 0x201A,
-            "ldquo": 0x201C,
-            "rdquo": 0x201D,
-            "bdquo": 0x201E,
-            "dagger": 0x2020,
-            "Dagger": 0x2021,
-            "bull": 0x2022,
-            "hellip": 0x2026,
-            "permil": 0x2030,
-            "prime": 0x2032,
-            "Prime": 0x2033,
-            "lsaquo": 0x2039,
-            "rsaquo": 0x203A,
-            "oline": 0x203E,
-            "frasl": 0x2044,
-            "euro": 0x20AC,
-            "image": 0x2111,
-            "weierp": 0x2118,
-            "real": 0x211C,
-            "trade": 0x2122,
-            "alefsym": 0x2135,
-            "larr": 0x2190,
-            "uarr": 0x2191,
-            "rarr": 0x2192,
-            "darr": 0x2193,
-            "harr": 0x2194,
-            "crarr": 0x21B5,
-            "lArr": 0x21D0,
-            "uArr": 0x21D1,
-            "rArr": 0x21D2,
-            "dArr": 0x21D3,
-            "hArr": 0x21D4,
-            "forall": 0x2200,
-            "part": 0x2202,
-            "exist": 0x2203,
-            "empty": 0x2205,
-            "nabla": 0x2207,
-            "isin": 0x2208,
-            "notin": 0x2209,
-            "ni": 0x220B,
-            "prod": 0x220F,
-            "sum": 0x2211,
-            "minus": 0x2212,
-            "lowast": 0x2217,
-            "radic": 0x221A,
-            "prop": 0x221D,
-            "infin": 0x221E,
-            "ang": 0x2220,
-            "and": 0x2227,
-            "or": 0x2228,
-            "cap": 0x2229,
-            "cup": 0x222A,
-            "int": 0x222B,
-            "there4": 0x2234,
-            "sim": 0x223C,
-            "cong": 0x2245,
-            "asymp": 0x2248,
-            "ne": 0x2260,
-            "equiv": 0x2261,
-            "le": 0x2264,
-            "ge": 0x2265,
-            "sub": 0x2282,
-            "sup": 0x2283,
-            "nsub": 0x2284,
-            "sube": 0x2286,
-            "supe": 0x2287,
-            "oplus": 0x2295,
-            "otimes": 0x2297,
-            "perp": 0x22A5,
-            "sdot": 0x22C5,
-            "lceil": 0x2308,
-            "rceil": 0x2309,
-            "lfloor": 0x230A,
-            "rfloor": 0x230B,
-            "lang": 0x2329,
-            "rang": 0x232A,
-            "loz": 0x25CA,
-            "spades": 0x2660,
-            "clubs": 0x2663,
-            "hearts": 0x2665,
-            "diams": 0x2666
-        });
-    }
+    const entities = createMapFromTemplate<number>({
+        "quot": 0x0022,
+        "amp": 0x0026,
+        "apos": 0x0027,
+        "lt": 0x003C,
+        "gt": 0x003E,
+        "nbsp": 0x00A0,
+        "iexcl": 0x00A1,
+        "cent": 0x00A2,
+        "pound": 0x00A3,
+        "curren": 0x00A4,
+        "yen": 0x00A5,
+        "brvbar": 0x00A6,
+        "sect": 0x00A7,
+        "uml": 0x00A8,
+        "copy": 0x00A9,
+        "ordf": 0x00AA,
+        "laquo": 0x00AB,
+        "not": 0x00AC,
+        "shy": 0x00AD,
+        "reg": 0x00AE,
+        "macr": 0x00AF,
+        "deg": 0x00B0,
+        "plusmn": 0x00B1,
+        "sup2": 0x00B2,
+        "sup3": 0x00B3,
+        "acute": 0x00B4,
+        "micro": 0x00B5,
+        "para": 0x00B6,
+        "middot": 0x00B7,
+        "cedil": 0x00B8,
+        "sup1": 0x00B9,
+        "ordm": 0x00BA,
+        "raquo": 0x00BB,
+        "frac14": 0x00BC,
+        "frac12": 0x00BD,
+        "frac34": 0x00BE,
+        "iquest": 0x00BF,
+        "Agrave": 0x00C0,
+        "Aacute": 0x00C1,
+        "Acirc": 0x00C2,
+        "Atilde": 0x00C3,
+        "Auml": 0x00C4,
+        "Aring": 0x00C5,
+        "AElig": 0x00C6,
+        "Ccedil": 0x00C7,
+        "Egrave": 0x00C8,
+        "Eacute": 0x00C9,
+        "Ecirc": 0x00CA,
+        "Euml": 0x00CB,
+        "Igrave": 0x00CC,
+        "Iacute": 0x00CD,
+        "Icirc": 0x00CE,
+        "Iuml": 0x00CF,
+        "ETH": 0x00D0,
+        "Ntilde": 0x00D1,
+        "Ograve": 0x00D2,
+        "Oacute": 0x00D3,
+        "Ocirc": 0x00D4,
+        "Otilde": 0x00D5,
+        "Ouml": 0x00D6,
+        "times": 0x00D7,
+        "Oslash": 0x00D8,
+        "Ugrave": 0x00D9,
+        "Uacute": 0x00DA,
+        "Ucirc": 0x00DB,
+        "Uuml": 0x00DC,
+        "Yacute": 0x00DD,
+        "THORN": 0x00DE,
+        "szlig": 0x00DF,
+        "agrave": 0x00E0,
+        "aacute": 0x00E1,
+        "acirc": 0x00E2,
+        "atilde": 0x00E3,
+        "auml": 0x00E4,
+        "aring": 0x00E5,
+        "aelig": 0x00E6,
+        "ccedil": 0x00E7,
+        "egrave": 0x00E8,
+        "eacute": 0x00E9,
+        "ecirc": 0x00EA,
+        "euml": 0x00EB,
+        "igrave": 0x00EC,
+        "iacute": 0x00ED,
+        "icirc": 0x00EE,
+        "iuml": 0x00EF,
+        "eth": 0x00F0,
+        "ntilde": 0x00F1,
+        "ograve": 0x00F2,
+        "oacute": 0x00F3,
+        "ocirc": 0x00F4,
+        "otilde": 0x00F5,
+        "ouml": 0x00F6,
+        "divide": 0x00F7,
+        "oslash": 0x00F8,
+        "ugrave": 0x00F9,
+        "uacute": 0x00FA,
+        "ucirc": 0x00FB,
+        "uuml": 0x00FC,
+        "yacute": 0x00FD,
+        "thorn": 0x00FE,
+        "yuml": 0x00FF,
+        "OElig": 0x0152,
+        "oelig": 0x0153,
+        "Scaron": 0x0160,
+        "scaron": 0x0161,
+        "Yuml": 0x0178,
+        "fnof": 0x0192,
+        "circ": 0x02C6,
+        "tilde": 0x02DC,
+        "Alpha": 0x0391,
+        "Beta": 0x0392,
+        "Gamma": 0x0393,
+        "Delta": 0x0394,
+        "Epsilon": 0x0395,
+        "Zeta": 0x0396,
+        "Eta": 0x0397,
+        "Theta": 0x0398,
+        "Iota": 0x0399,
+        "Kappa": 0x039A,
+        "Lambda": 0x039B,
+        "Mu": 0x039C,
+        "Nu": 0x039D,
+        "Xi": 0x039E,
+        "Omicron": 0x039F,
+        "Pi": 0x03A0,
+        "Rho": 0x03A1,
+        "Sigma": 0x03A3,
+        "Tau": 0x03A4,
+        "Upsilon": 0x03A5,
+        "Phi": 0x03A6,
+        "Chi": 0x03A7,
+        "Psi": 0x03A8,
+        "Omega": 0x03A9,
+        "alpha": 0x03B1,
+        "beta": 0x03B2,
+        "gamma": 0x03B3,
+        "delta": 0x03B4,
+        "epsilon": 0x03B5,
+        "zeta": 0x03B6,
+        "eta": 0x03B7,
+        "theta": 0x03B8,
+        "iota": 0x03B9,
+        "kappa": 0x03BA,
+        "lambda": 0x03BB,
+        "mu": 0x03BC,
+        "nu": 0x03BD,
+        "xi": 0x03BE,
+        "omicron": 0x03BF,
+        "pi": 0x03C0,
+        "rho": 0x03C1,
+        "sigmaf": 0x03C2,
+        "sigma": 0x03C3,
+        "tau": 0x03C4,
+        "upsilon": 0x03C5,
+        "phi": 0x03C6,
+        "chi": 0x03C7,
+        "psi": 0x03C8,
+        "omega": 0x03C9,
+        "thetasym": 0x03D1,
+        "upsih": 0x03D2,
+        "piv": 0x03D6,
+        "ensp": 0x2002,
+        "emsp": 0x2003,
+        "thinsp": 0x2009,
+        "zwnj": 0x200C,
+        "zwj": 0x200D,
+        "lrm": 0x200E,
+        "rlm": 0x200F,
+        "ndash": 0x2013,
+        "mdash": 0x2014,
+        "lsquo": 0x2018,
+        "rsquo": 0x2019,
+        "sbquo": 0x201A,
+        "ldquo": 0x201C,
+        "rdquo": 0x201D,
+        "bdquo": 0x201E,
+        "dagger": 0x2020,
+        "Dagger": 0x2021,
+        "bull": 0x2022,
+        "hellip": 0x2026,
+        "permil": 0x2030,
+        "prime": 0x2032,
+        "Prime": 0x2033,
+        "lsaquo": 0x2039,
+        "rsaquo": 0x203A,
+        "oline": 0x203E,
+        "frasl": 0x2044,
+        "euro": 0x20AC,
+        "image": 0x2111,
+        "weierp": 0x2118,
+        "real": 0x211C,
+        "trade": 0x2122,
+        "alefsym": 0x2135,
+        "larr": 0x2190,
+        "uarr": 0x2191,
+        "rarr": 0x2192,
+        "darr": 0x2193,
+        "harr": 0x2194,
+        "crarr": 0x21B5,
+        "lArr": 0x21D0,
+        "uArr": 0x21D1,
+        "rArr": 0x21D2,
+        "dArr": 0x21D3,
+        "hArr": 0x21D4,
+        "forall": 0x2200,
+        "part": 0x2202,
+        "exist": 0x2203,
+        "empty": 0x2205,
+        "nabla": 0x2207,
+        "isin": 0x2208,
+        "notin": 0x2209,
+        "ni": 0x220B,
+        "prod": 0x220F,
+        "sum": 0x2211,
+        "minus": 0x2212,
+        "lowast": 0x2217,
+        "radic": 0x221A,
+        "prop": 0x221D,
+        "infin": 0x221E,
+        "ang": 0x2220,
+        "and": 0x2227,
+        "or": 0x2228,
+        "cap": 0x2229,
+        "cup": 0x222A,
+        "int": 0x222B,
+        "there4": 0x2234,
+        "sim": 0x223C,
+        "cong": 0x2245,
+        "asymp": 0x2248,
+        "ne": 0x2260,
+        "equiv": 0x2261,
+        "le": 0x2264,
+        "ge": 0x2265,
+        "sub": 0x2282,
+        "sup": 0x2283,
+        "nsub": 0x2284,
+        "sube": 0x2286,
+        "supe": 0x2287,
+        "oplus": 0x2295,
+        "otimes": 0x2297,
+        "perp": 0x22A5,
+        "sdot": 0x22C5,
+        "lceil": 0x2308,
+        "rceil": 0x2309,
+        "lfloor": 0x230A,
+        "rfloor": 0x230B,
+        "lang": 0x2329,
+        "rang": 0x232A,
+        "loz": 0x25CA,
+        "spades": 0x2660,
+        "clubs": 0x2663,
+        "hearts": 0x2665,
+        "diams": 0x2666
+    });
 }
\ No newline at end of file
diff --git a/src/compiler/transformers/module/es2015.ts b/src/compiler/transformers/module/es2015.ts
new file mode 100644
index 0000000..3951d08
--- /dev/null
+++ b/src/compiler/transformers/module/es2015.ts
@@ -0,0 +1,118 @@
+/// <reference path="../../factory.ts" />
+/// <reference path="../../visitor.ts" />
+
+/*@internal*/
+namespace ts {
+    export function transformES2015Module(context: TransformationContext) {
+        const compilerOptions = context.getCompilerOptions();
+        const previousOnEmitNode = context.onEmitNode;
+        const previousOnSubstituteNode = context.onSubstituteNode;
+        context.onEmitNode = onEmitNode;
+        context.onSubstituteNode = onSubstituteNode;
+        context.enableEmitNotification(SyntaxKind.SourceFile);
+        context.enableSubstitution(SyntaxKind.Identifier);
+
+        let currentSourceFile: SourceFile;
+        return transformSourceFile;
+
+        function transformSourceFile(node: SourceFile) {
+            if (node.isDeclarationFile) {
+                return node;
+            }
+
+            if (isExternalModule(node) || compilerOptions.isolatedModules) {
+                const externalHelpersModuleName = getOrCreateExternalHelpersModuleNameIfNeeded(node, compilerOptions);
+                if (externalHelpersModuleName) {
+                    const statements: Statement[] = [];
+                    const statementOffset = addPrologue(statements, node.statements);
+                    append(statements,
+                        createImportDeclaration(
+                            /*decorators*/ undefined,
+                            /*modifiers*/ undefined,
+                            createImportClause(/*name*/ undefined, createNamespaceImport(externalHelpersModuleName)),
+                            createLiteral(externalHelpersModuleNameText)
+                        )
+                    );
+
+                    addRange(statements, visitNodes(node.statements, visitor, isStatement, statementOffset));
+                    return updateSourceFileNode(
+                        node,
+                        setTextRange(createNodeArray(statements), node.statements));
+                }
+                else {
+                    return visitEachChild(node, visitor, context);
+                }
+            }
+
+            return node;
+        }
+
+        function visitor(node: Node): VisitResult<Node> {
+            switch (node.kind) {
+                case SyntaxKind.ImportEqualsDeclaration:
+                    // Elide `import=` as it is not legal with --module ES6
+                    return undefined;
+                case SyntaxKind.ExportAssignment:
+                    return visitExportAssignment(<ExportAssignment>node);
+            }
+
+            return node;
+        }
+
+        function visitExportAssignment(node: ExportAssignment): VisitResult<ExportAssignment> {
+            // Elide `export=` as it is not legal with --module ES6
+            return node.isExportEquals ? undefined : node;
+        }
+
+        //
+        // Emit Notification
+        //
+
+        /**
+         * Hook for node emit.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to emit.
+         * @param emit A callback used to emit the node in the printer.
+         */
+        function onEmitNode(hint: EmitHint, node: Node, emitCallback: (hint: EmitHint, node: Node) => void): void {
+            if (isSourceFile(node)) {
+                currentSourceFile = node;
+                previousOnEmitNode(hint, node, emitCallback);
+                currentSourceFile = undefined;
+            }
+            else {
+                previousOnEmitNode(hint, node, emitCallback);
+            }
+        }
+
+        //
+        // Substitutions
+        //
+
+        /**
+         * Hooks node substitutions.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to substitute.
+         */
+        function onSubstituteNode(hint: EmitHint, node: Node) {
+            node = previousOnSubstituteNode(hint, node);
+            if (isIdentifier(node) && hint === EmitHint.Expression) {
+                return substituteExpressionIdentifier(node);
+            }
+
+            return node;
+        }
+
+        function substituteExpressionIdentifier(node: Identifier): Expression {
+            if (getEmitFlags(node) & EmitFlags.HelperName) {
+                const externalHelpersModuleName = getExternalHelpersModuleName(currentSourceFile);
+                if (externalHelpersModuleName) {
+                    return createPropertyAccess(externalHelpersModuleName, node);
+                }
+            }
+            return node;
+        }
+    }
+}
diff --git a/src/compiler/transformers/module/module.ts b/src/compiler/transformers/module/module.ts
index c4e9b4c..6141f52 100644
--- a/src/compiler/transformers/module/module.ts
+++ b/src/compiler/transformers/module/module.ts
@@ -1,20 +1,27 @@
 /// <reference path="../../factory.ts" />
 /// <reference path="../../visitor.ts" />
+/// <reference path="../destructuring.ts" />
 
 /*@internal*/
 namespace ts {
     export function transformModule(context: TransformationContext) {
-        const transformModuleDelegates = createMap<(node: SourceFile) => SourceFile>({
-            [ModuleKind.None]: transformCommonJSModule,
-            [ModuleKind.CommonJS]: transformCommonJSModule,
-            [ModuleKind.AMD]: transformAMDModule,
-            [ModuleKind.UMD]: transformUMDModule,
-        });
+        interface AsynchronousDependencies {
+            aliasedModuleNames: Expression[];
+            unaliasedModuleNames: Expression[];
+            importAliasNames: ParameterDeclaration[];
+        }
+
+        function getTransformModuleDelegate(moduleKind: ModuleKind): (node: SourceFile) => SourceFile {
+            switch (moduleKind) {
+                case ModuleKind.AMD: return transformAMDModule;
+                case ModuleKind.UMD: return transformUMDModule;
+                default: return transformCommonJSModule;
+            }
+        }
 
         const {
             startLexicalEnvironment,
-            endLexicalEnvironment,
-            hoistVariableDeclaration,
+            endLexicalEnvironment
         } = context;
 
         const compilerOptions = context.getCompilerOptions();
@@ -26,22 +33,20 @@ namespace ts {
         const previousOnEmitNode = context.onEmitNode;
         context.onSubstituteNode = onSubstituteNode;
         context.onEmitNode = onEmitNode;
-        context.enableSubstitution(SyntaxKind.Identifier);
-        context.enableSubstitution(SyntaxKind.BinaryExpression);
-        context.enableSubstitution(SyntaxKind.PrefixUnaryExpression);
-        context.enableSubstitution(SyntaxKind.PostfixUnaryExpression);
-        context.enableSubstitution(SyntaxKind.ShorthandPropertyAssignment);
-        context.enableEmitNotification(SyntaxKind.SourceFile);
-
-        let currentSourceFile: SourceFile;
-        let externalImports: (ImportDeclaration | ImportEqualsDeclaration | ExportDeclaration)[];
-        let exportSpecifiers: Map<ExportSpecifier[]>;
-        let exportEquals: ExportAssignment;
-        let bindingNameExportSpecifiersMap: Map<ExportSpecifier[]>;
-        // Subset of exportSpecifiers that is a binding-name.
-        // This is to reduce amount of memory we have to keep around even after we done with module-transformer
-        const bindingNameExportSpecifiersForFileMap = createMap<Map<ExportSpecifier[]>>();
-        let hasExportStarsToExportValues: boolean;
+        context.enableSubstitution(SyntaxKind.Identifier); // Substitutes expression identifiers with imported/exported symbols.
+        context.enableSubstitution(SyntaxKind.BinaryExpression); // Substitutes assignments to exported symbols.
+        context.enableSubstitution(SyntaxKind.PrefixUnaryExpression); // Substitutes updates to exported symbols.
+        context.enableSubstitution(SyntaxKind.PostfixUnaryExpression); // Substitutes updates to exported symbols.
+        context.enableSubstitution(SyntaxKind.ShorthandPropertyAssignment); // Substitutes shorthand property assignments for imported/exported symbols.
+        context.enableEmitNotification(SyntaxKind.SourceFile); // Restore state when substituting nodes in a file.
+
+        const moduleInfoMap: ExternalModuleInfo[] = []; // The ExternalModuleInfo for each file.
+        const deferredExports: Statement[][] = []; // Exports to defer until an EndOfDeclarationMarker is found.
+
+        let currentSourceFile: SourceFile; // The current file.
+        let currentModuleInfo: ExternalModuleInfo; // The ExternalModuleInfo for the current file.
+        let noSubstitution: boolean[]; // Set of nodes for which substitution rules should be ignored.
+        let needUMDDynamicImportHelper: boolean;
 
         return transformSourceFile;
 
@@ -51,30 +56,29 @@ namespace ts {
          * @param node The SourceFile node.
          */
         function transformSourceFile(node: SourceFile) {
-            if (isDeclarationFile(node)) {
+            if (node.isDeclarationFile || !(isExternalModule(node) || compilerOptions.isolatedModules || node.transformFlags & TransformFlags.ContainsDynamicImport)) {
                 return node;
             }
 
-            if (isExternalModule(node) || compilerOptions.isolatedModules) {
-                currentSourceFile = node;
-
-                // Collect information about the external module.
-                ({ externalImports, exportSpecifiers, exportEquals, hasExportStarsToExportValues } = collectExternalModuleInfo(node, resolver));
+            currentSourceFile = node;
+            currentModuleInfo = collectExternalModuleInfo(node, resolver, compilerOptions);
+            moduleInfoMap[getOriginalNodeId(node)] = currentModuleInfo;
+
+            // Perform the transformation.
+            const transformModule = getTransformModuleDelegate(moduleKind);
+            const updated = transformModule(node);
+            currentSourceFile = undefined;
+            currentModuleInfo = undefined;
+            needUMDDynamicImportHelper = false;
+            return aggregateTransformFlags(updated);
+        }
 
-                // Perform the transformation.
-                const transformModule = transformModuleDelegates[moduleKind] || transformModuleDelegates[ModuleKind.None];
-                const updated = transformModule(node);
-                aggregateTransformFlags(updated);
 
-                currentSourceFile = undefined;
-                externalImports = undefined;
-                exportSpecifiers = undefined;
-                exportEquals = undefined;
-                hasExportStarsToExportValues = false;
-                return updated;
+        function shouldEmitUnderscoreUnderscoreESModule() {
+            if (!currentModuleInfo.exportEquals && isExternalModule(currentSourceFile)) {
+                return true;
             }
-
-            return node;
+            return false;
         }
 
         /**
@@ -86,16 +90,25 @@ namespace ts {
             startLexicalEnvironment();
 
             const statements: Statement[] = [];
-            const statementOffset = addPrologueDirectives(statements, node.statements, /*ensureUseStrict*/ !compilerOptions.noImplicitUseStrict, visitor);
-            addRange(statements, visitNodes(node.statements, visitor, isStatement, statementOffset));
-            addRange(statements, endLexicalEnvironment());
-            addExportEqualsIfNeeded(statements, /*emitAsReturn*/ false);
+            const ensureUseStrict = compilerOptions.alwaysStrict || (!compilerOptions.noImplicitUseStrict && isExternalModule(currentSourceFile));
+            const statementOffset = addPrologue(statements, node.statements, ensureUseStrict, sourceElementVisitor);
 
-            const updated = updateSourceFile(node, statements);
-            if (hasExportStarsToExportValues) {
-                setEmitFlags(updated, EmitFlags.EmitExportStar | getEmitFlags(node));
+            if (shouldEmitUnderscoreUnderscoreESModule()) {
+                append(statements, createUnderscoreUnderscoreESModule());
             }
 
+            append(statements, visitNode(currentModuleInfo.externalHelpersImportDeclaration, sourceElementVisitor, isStatement));
+            addRange(statements, visitNodes(node.statements, sourceElementVisitor, isStatement, statementOffset));
+            addExportEqualsIfNeeded(statements, /*emitAsReturn*/ false);
+            addRange(statements, endLexicalEnvironment());
+
+            const updated = updateSourceFileNode(node, setTextRange(createNodeArray(statements), node.statements));
+            if (currentModuleInfo.hasExportStarsToExportValues && !compilerOptions.importHelpers) {
+                // If we have any `export * from ...` declarations
+                // we need to inform the emitter to add the __export helper.
+                addEmitHelper(updated, exportStarHelper);
+            }
+            addEmitHelpers(updated, context.readEmitHelpers());
             return updated;
         }
 
@@ -107,29 +120,7 @@ namespace ts {
         function transformAMDModule(node: SourceFile) {
             const define = createIdentifier("define");
             const moduleName = tryGetModuleNameFromFile(node, host, compilerOptions);
-            return transformAsynchronousModule(node, define, moduleName, /*includeNonAmdDependencies*/ true);
-        }
-
-        /**
-         * Transforms a SourceFile into a UMD module.
-         *
-         * @param node The SourceFile node.
-         */
-        function transformUMDModule(node: SourceFile) {
-            const define = createIdentifier("define");
-            setEmitFlags(define, EmitFlags.UMDDefine);
-            return transformAsynchronousModule(node, define, /*moduleName*/ undefined, /*includeNonAmdDependencies*/ false);
-        }
 
-        /**
-         * Transforms a SourceFile into an AMD or UMD module.
-         *
-         * @param node The SourceFile node.
-         * @param define The expression used to define the module.
-         * @param moduleName An expression for the module name, if available.
-         * @param includeNonAmdDependencies A value indicating whether to incldue any non-AMD dependencies.
-         */
-        function transformAsynchronousModule(node: SourceFile, define: Expression, moduleName: Expression, includeNonAmdDependencies: boolean) {
             // An AMD define function has the following shape:
             //
             //     define(id?, dependencies?, factory);
@@ -151,49 +142,243 @@ namespace ts {
             //
             // we need to add modules without alias names to the end of the dependencies list
 
-            const { aliasedModuleNames, unaliasedModuleNames, importAliasNames } = collectAsynchronousDependencies(node, includeNonAmdDependencies);
+            const { aliasedModuleNames, unaliasedModuleNames, importAliasNames } = collectAsynchronousDependencies(node, /*includeNonAmdDependencies*/ true);
 
             // Create an updated SourceFile:
             //
             //     define(moduleName?, ["module1", "module2"], function ...
-            return updateSourceFile(node, [
-                createStatement(
-                    createCall(
-                        define,
-                        /*typeArguments*/ undefined,
+            return updateSourceFileNode(node,
+                setTextRange(
+                    createNodeArray([
+                        createStatement(
+                            createCall(
+                                define,
+                                /*typeArguments*/ undefined,
+                                [
+                                    // Add the module name (if provided).
+                                    ...(moduleName ? [moduleName] : []),
+
+                                    // Add the dependency array argument:
+                                    //
+                                    //     ["require", "exports", module1", "module2", ...]
+                                    createArrayLiteral([
+                                        createLiteral("require"),
+                                        createLiteral("exports"),
+                                        ...aliasedModuleNames,
+                                        ...unaliasedModuleNames
+                                    ]),
+
+                                    // Add the module body function argument:
+                                    //
+                                    //     function (require, exports, module1, module2) ...
+                                    createFunctionExpression(
+                                        /*modifiers*/ undefined,
+                                        /*asteriskToken*/ undefined,
+                                        /*name*/ undefined,
+                                        /*typeParameters*/ undefined,
+                                        [
+                                            createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, "require"),
+                                            createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, "exports"),
+                                            ...importAliasNames
+                                        ],
+                                        /*type*/ undefined,
+                                        transformAsynchronousModuleBody(node)
+                                    )
+                                ]
+                            )
+                        )
+                    ]),
+                    /*location*/ node.statements
+                )
+            );
+        }
+
+        /**
+         * Transforms a SourceFile into a UMD module.
+         *
+         * @param node The SourceFile node.
+         */
+        function transformUMDModule(node: SourceFile) {
+            const { aliasedModuleNames, unaliasedModuleNames, importAliasNames } = collectAsynchronousDependencies(node, /*includeNonAmdDependencies*/ false);
+            const umdHeader = createFunctionExpression(
+                /*modifiers*/ undefined,
+                /*asteriskToken*/ undefined,
+                /*name*/ undefined,
+                /*typeParameters*/ undefined,
+                [createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, "factory")],
+                /*type*/ undefined,
+                setTextRange(
+                    createBlock(
                         [
-                            // Add the module name (if provided).
-                            ...(moduleName ? [moduleName] : []),
-
-                            // Add the dependency array argument:
-                            //
-                            //     ["require", "exports", module1", "module2", ...]
-                            createArrayLiteral([
-                                createLiteral("require"),
-                                createLiteral("exports"),
-                                ...aliasedModuleNames,
-                                ...unaliasedModuleNames
-                            ]),
-
-                            // Add the module body function argument:
-                            //
-                            //     function (require, exports, module1, module2) ...
-                            createFunctionExpression(
-                                /*asteriskToken*/ undefined,
-                                /*name*/ undefined,
-                                /*typeParameters*/ undefined,
+                            createIf(
+                                createLogicalAnd(
+                                    createTypeCheck(createIdentifier("module"), "object"),
+                                    createTypeCheck(createPropertyAccess(createIdentifier("module"), "exports"), "object")
+                                ),
+                                createBlock([
+                                    createVariableStatement(
+                                        /*modifiers*/ undefined,
+                                        [
+                                            createVariableDeclaration(
+                                                "v",
+                                                /*type*/ undefined,
+                                                createCall(
+                                                    createIdentifier("factory"),
+                                                    /*typeArguments*/ undefined,
+                                                    [
+                                                        createIdentifier("require"),
+                                                        createIdentifier("exports")
+                                                    ]
+                                                )
+                                            )
+                                        ]
+                                    ),
+                                    setEmitFlags(
+                                        createIf(
+                                            createStrictInequality(
+                                                createIdentifier("v"),
+                                                createIdentifier("undefined")
+                                            ),
+                                            createStatement(
+                                                createAssignment(
+                                                    createPropertyAccess(createIdentifier("module"), "exports"),
+                                                    createIdentifier("v")
+                                                )
+                                            )
+                                        ),
+                                        EmitFlags.SingleLine
+                                    )
+                                ]),
+                                createIf(
+                                    createLogicalAnd(
+                                        createTypeCheck(createIdentifier("define"), "function"),
+                                        createPropertyAccess(createIdentifier("define"), "amd")
+                                    ),
+                                    createBlock([
+                                        createStatement(
+                                            createCall(
+                                                createIdentifier("define"),
+                                                /*typeArguments*/ undefined,
+                                                [
+                                                    createArrayLiteral([
+                                                        createLiteral("require"),
+                                                        createLiteral("exports"),
+                                                        ...aliasedModuleNames,
+                                                        ...unaliasedModuleNames
+                                                    ]),
+                                                    createIdentifier("factory")
+                                                ]
+                                            )
+                                        )
+                                    ])
+                                )
+                            )
+                        ],
+                        /*multiLine*/ true
+                    ),
+                    /*location*/ undefined
+                )
+            );
+
+            // Create an updated SourceFile:
+            //
+            //  (function (factory) {
+            //      if (typeof module === "object" && typeof module.exports === "object") {
+            //          var v = factory(require, exports);
+            //          if (v !== undefined) module.exports = v;
+            //      }
+            //      else if (typeof define === 'function' && define.amd) {
+            //          define(["require", "exports"], factory);
+            //      }
+            //  })(function ...)
+
+            return updateSourceFileNode(
+                node,
+                setTextRange(
+                    createNodeArray([
+                        createStatement(
+                            createCall(
+                                umdHeader,
+                                /*typeArguments*/ undefined,
                                 [
-                                    createParameter("require"),
-                                    createParameter("exports"),
-                                    ...importAliasNames
-                                ],
-                                /*type*/ undefined,
-                                transformAsynchronousModuleBody(node)
+                                    // Add the module body function argument:
+                                    //
+                                    //     function (require, exports) ...
+                                    createFunctionExpression(
+                                        /*modifiers*/ undefined,
+                                        /*asteriskToken*/ undefined,
+                                        /*name*/ undefined,
+                                        /*typeParameters*/ undefined,
+                                        [
+                                            createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, "require"),
+                                            createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, "exports"),
+                                            ...importAliasNames
+                                        ],
+                                        /*type*/ undefined,
+                                        transformAsynchronousModuleBody(node)
+                                    )
+                                ]
                             )
-                        ]
-                    )
+                        )
+                    ]),
+                    /*location*/ node.statements
                 )
-            ]);
+            );
+        }
+
+        /**
+         * Collect the additional asynchronous dependencies for the module.
+         *
+         * @param node The source file.
+         * @param includeNonAmdDependencies A value indicating whether to include non-AMD dependencies.
+         */
+        function collectAsynchronousDependencies(node: SourceFile, includeNonAmdDependencies: boolean): AsynchronousDependencies {
+            // names of modules with corresponding parameter in the factory function
+            const aliasedModuleNames: Expression[] = [];
+
+            // names of modules with no corresponding parameters in factory function
+            const unaliasedModuleNames: Expression[] = [];
+
+            // names of the parameters in the factory function; these
+            // parameters need to match the indexes of the corresponding
+            // module names in aliasedModuleNames.
+            const importAliasNames: ParameterDeclaration[] = [];
+
+            // Fill in amd-dependency tags
+            for (const amdDependency of node.amdDependencies) {
+                if (amdDependency.name) {
+                    aliasedModuleNames.push(createLiteral(amdDependency.path));
+                    importAliasNames.push(createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, amdDependency.name));
+                }
+                else {
+                    unaliasedModuleNames.push(createLiteral(amdDependency.path));
+                }
+            }
+
+            for (const importNode of currentModuleInfo.externalImports) {
+                // Find the name of the external module
+                const externalModuleName = getExternalModuleNameLiteral(importNode, currentSourceFile, host, resolver, compilerOptions);
+
+                // Find the name of the module alias, if there is one
+                const importAliasName = getLocalNameForExternalImport(importNode, currentSourceFile);
+                // It is possible that externalModuleName is undefined if it is not string literal.
+                // This can happen in the invalid import syntax.
+                // E.g : "import * from alias from 'someLib';"
+                if (externalModuleName) {
+                    if (includeNonAmdDependencies && importAliasName) {
+                        // Set emitFlags on the name of the classDeclaration
+                        // This is so that when printer will not substitute the identifier
+                        setEmitFlags(importAliasName, EmitFlags.NoSubstitution);
+                        aliasedModuleNames.push(externalModuleName);
+                        importAliasNames.push(createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, importAliasName));
+                    }
+                    else {
+                        unaliasedModuleNames.push(externalModuleName);
+                    }
+                }
+            }
+
+            return { aliasedModuleNames, unaliasedModuleNames, importAliasNames };
         }
 
         /**
@@ -205,36 +390,49 @@ namespace ts {
             startLexicalEnvironment();
 
             const statements: Statement[] = [];
-            const statementOffset = addPrologueDirectives(statements, node.statements, /*ensureUseStrict*/ !compilerOptions.noImplicitUseStrict, visitor);
+            const statementOffset = addPrologue(statements, node.statements, /*ensureUseStrict*/ !compilerOptions.noImplicitUseStrict, sourceElementVisitor);
+
+            if (shouldEmitUnderscoreUnderscoreESModule()) {
+                append(statements, createUnderscoreUnderscoreESModule());
+            }
 
             // Visit each statement of the module body.
-            addRange(statements, visitNodes(node.statements, visitor, isStatement, statementOffset));
+            append(statements, visitNode(currentModuleInfo.externalHelpersImportDeclaration, sourceElementVisitor, isStatement));
+            addRange(statements, visitNodes(node.statements, sourceElementVisitor, isStatement, statementOffset));
+
+            // Append the 'export =' statement if provided.
+            addExportEqualsIfNeeded(statements, /*emitAsReturn*/ true);
 
             // End the lexical environment for the module body
             // and merge any new lexical declarations.
             addRange(statements, endLexicalEnvironment());
 
-            // Append the 'export =' statement if provided.
-            addExportEqualsIfNeeded(statements, /*emitAsReturn*/ true);
-
-            const body = createBlock(statements, /*location*/ undefined, /*multiLine*/ true);
-            if (hasExportStarsToExportValues) {
+            const body = createBlock(statements, /*multiLine*/ true);
+            if (currentModuleInfo.hasExportStarsToExportValues && !compilerOptions.importHelpers) {
                 // If we have any `export * from ...` declarations
                 // we need to inform the emitter to add the __export helper.
-                setEmitFlags(body, EmitFlags.EmitExportStar);
+                addEmitHelper(body, exportStarHelper);
+            }
+            if (needUMDDynamicImportHelper) {
+                addEmitHelper(body, dynamicImportUMDHelper);
             }
 
             return body;
         }
 
+        /**
+         * Adds the down-level representation of `export=` to the statement list if one exists
+         * in the source file.
+         *
+         * @param statements The Statement list to modify.
+         * @param emitAsReturn A value indicating whether to emit the `export=` statement as a
+         * return statement.
+         */
         function addExportEqualsIfNeeded(statements: Statement[], emitAsReturn: boolean) {
-            if (exportEquals && resolver.isValueAliasDeclaration(exportEquals)) {
+            if (currentModuleInfo.exportEquals) {
                 if (emitAsReturn) {
-                    const statement = createReturn(
-                        exportEquals.expression,
-                        /*location*/ exportEquals
-                    );
-
+                    const statement = createReturn(currentModuleInfo.exportEquals.expression);
+                    setTextRange(statement, currentModuleInfo.exportEquals);
                     setEmitFlags(statement, EmitFlags.NoTokenSourceMaps | EmitFlags.NoComments);
                     statements.push(statement);
                 }
@@ -245,23 +443,27 @@ namespace ts {
                                 createIdentifier("module"),
                                 "exports"
                             ),
-                            exportEquals.expression
-                        ),
-                        /*location*/ exportEquals
+                            currentModuleInfo.exportEquals.expression
+                        )
                     );
 
+                    setTextRange(statement, currentModuleInfo.exportEquals);
                     setEmitFlags(statement, EmitFlags.NoComments);
                     statements.push(statement);
                 }
             }
         }
 
+        //
+        // Top-Level Source Element Visitors
+        //
+
         /**
          * Visits a node at the top level of the source file.
          *
-         * @param node The node.
+         * @param node The node to visit.
          */
-        function visitor(node: Node): VisitResult<Node> {
+        function sourceElementVisitor(node: Node): VisitResult<Node> {
             switch (node.kind) {
                 case SyntaxKind.ImportDeclaration:
                     return visitImportDeclaration(<ImportDeclaration>node);
@@ -284,37 +486,129 @@ namespace ts {
                 case SyntaxKind.ClassDeclaration:
                     return visitClassDeclaration(<ClassDeclaration>node);
 
-                case SyntaxKind.ExpressionStatement:
-                    return visitExpressionStatement(<ExpressionStatement>node);
+                case SyntaxKind.MergeDeclarationMarker:
+                    return visitMergeDeclarationMarker(<MergeDeclarationMarker>node);
+
+                case SyntaxKind.EndOfDeclarationMarker:
+                    return visitEndOfDeclarationMarker(<EndOfDeclarationMarker>node);
+
+                default:
+                    return visitEachChild(node, importCallExpressionVisitor, context);
+            }
+        }
+
+        function importCallExpressionVisitor(node: Node): VisitResult<Node> {
+            // This visitor does not need to descend into the tree if there is no dynamic import,
+            // as export/import statements are only transformed at the top level of a file.
+            if (!(node.transformFlags & TransformFlags.ContainsDynamicImport)) {
+                return node;
+            }
+
+            if (isImportCall(node)) {
+                return visitImportCallExpression(<ImportCall>node);
+            }
+            else {
+                return visitEachChild(node, importCallExpressionVisitor, context);
+            }
+        }
 
+        function visitImportCallExpression(node: ImportCall): Expression {
+            switch (compilerOptions.module) {
+                case ModuleKind.AMD:
+                    return transformImportCallExpressionAMD(node);
+                case ModuleKind.UMD:
+                    return transformImportCallExpressionUMD(node);
+                case ModuleKind.CommonJS:
                 default:
-                    // This visitor does not descend into the tree, as export/import statements
-                    // are only transformed at the top level of a file.
-                    return node;
+                    return transformImportCallExpressionCommonJS(node);
             }
         }
 
+        function transformImportCallExpressionUMD(node: ImportCall): Expression {
+            // (function (factory) {
+            //      ... (regular UMD)
+            // }
+            // })(function (require, exports, useSyncRequire) {
+            //      "use strict";
+            //      Object.defineProperty(exports, "__esModule", { value: true });
+            //      var __syncRequire = typeof module === "object" && typeof module.exports === "object";
+            //      var __resolved = new Promise(function (resolve) { resolve(); });
+            //      .....
+            //      __syncRequire
+            //          ? __resolved.then(function () { return require(x); }) /*CommonJs Require*/
+            //          : new Promise(function (_a, _b) { require([x], _a, _b); }); /*Amd Require*/
+            // });
+            needUMDDynamicImportHelper = true;
+            return createConditional(
+                /*condition*/ createIdentifier("__syncRequire"),
+                /*whenTrue*/ transformImportCallExpressionCommonJS(node),
+                /*whenFalse*/ transformImportCallExpressionAMD(node)
+            );
+        }
+
+        function transformImportCallExpressionAMD(node: ImportCall): Expression {
+            // improt("./blah")
+            // emit as
+            // define(["require", "exports", "blah"], function (require, exports) {
+            //     ...
+            //     new Promise(function (_a, _b) { require([x], _a, _b); }); /*Amd Require*/
+            // });
+            const resolve = createUniqueName("resolve");
+            const reject = createUniqueName("reject");
+            return createNew(
+                createIdentifier("Promise"),
+                /*typeArguments*/ undefined,
+                [createFunctionExpression(
+                    /*modifiers*/ undefined,
+                    /*asteriskToken*/ undefined,
+                    /*name*/ undefined,
+                    /*typeParameters*/ undefined,
+                    [createParameter(/*decorator*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, /*name*/ resolve),
+                     createParameter(/*decorator*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, /*name*/ reject)],
+                    /*type*/ undefined,
+                    createBlock([createStatement(
+                        createCall(
+                            createIdentifier("require"),
+                            /*typeArguments*/ undefined,
+                            [createArrayLiteral([firstOrUndefined(node.arguments) || createOmittedExpression()]), resolve, reject]
+                        ))])
+            )]);
+        }
+
+    function transformImportCallExpressionCommonJS(node: ImportCall): Expression {
+            // import("./blah")
+            // emit as
+            // Promise.resolve().then(function () { return require(x); }) /*CommonJs Require*/
+            // We have to wrap require in then callback so that require is done in asynchronously
+            // if we simply do require in resolve callback in Promise constructor. We will execute the loading immediately
+            return createCall(
+                createPropertyAccess(
+                    createCall(createPropertyAccess(createIdentifier("Promise"), "resolve"), /*typeArguments*/ undefined, /*argumentsArray*/ []),
+                    "then"),
+                /*typeArguments*/ undefined,
+                [createFunctionExpression(
+                    /*modifiers*/ undefined,
+                    /*asteriskToken*/ undefined,
+                    /*name*/ undefined,
+                    /*typeParameters*/ undefined,
+                    /*parameters*/ undefined,
+                    /*type*/ undefined,
+                    createBlock([createReturn(createCall(createIdentifier("require"), /*typeArguments*/ undefined, node.arguments))])
+                )]);
+        }
+
         /**
          * Visits an ImportDeclaration node.
          *
-         * @param node The ImportDeclaration node.
+         * @param node The node to visit.
          */
         function visitImportDeclaration(node: ImportDeclaration): VisitResult<Statement> {
-            if (!contains(externalImports, node)) {
-                return undefined;
-            }
-
-            const statements: Statement[] = [];
+            let statements: Statement[];
             const namespaceDeclaration = getNamespaceDeclarationNode(node);
             if (moduleKind !== ModuleKind.AMD) {
                 if (!node.importClause) {
                     // import "mod";
-                    statements.push(
-                        createStatement(
-                            createRequireCall(node),
-                            /*location*/ node
-                        )
-                    );
+                    return setTextRange(createStatement(createRequireCall(node)), node);
                 }
                 else {
                     const variables: VariableDeclaration[] = [];
@@ -352,10 +646,15 @@ namespace ts {
                         }
                     }
 
-                    statements.push(
-                        createVariableStatement(
-                            /*modifiers*/ undefined,
-                            createConstDeclarationList(variables),
+                    statements = append(statements,
+                        setTextRange(
+                            createVariableStatement(
+                                /*modifiers*/ undefined,
+                                createVariableDeclarationList(
+                                    variables,
+                                    languageVersion >= ScriptTarget.ES2015 ? NodeFlags.Const : NodeFlags.None
+                                )
+                            ),
                             /*location*/ node
                         )
                     );
@@ -363,494 +662,742 @@ namespace ts {
             }
             else if (namespaceDeclaration && isDefaultImport(node)) {
                 // import d, * as n from "mod";
-                statements.push(
+                statements = append(statements,
                     createVariableStatement(
                         /*modifiers*/ undefined,
-                        createVariableDeclarationList([
-                            createVariableDeclaration(
-                                getSynthesizedClone(namespaceDeclaration.name),
-                                /*type*/ undefined,
-                                getGeneratedNameForNode(node),
-                                /*location*/ node
-                            )
-                        ])
+                        createVariableDeclarationList(
+                            [
+                                setTextRange(
+                                    createVariableDeclaration(
+                                        getSynthesizedClone(namespaceDeclaration.name),
+                                        /*type*/ undefined,
+                                        getGeneratedNameForNode(node)
+                                    ),
+                                    /*location*/ node
+                                )
+                            ],
+                            languageVersion >= ScriptTarget.ES2015 ? NodeFlags.Const : NodeFlags.None
+                        )
                     )
                 );
             }
 
-            addExportImportAssignments(statements, node);
+            if (hasAssociatedEndOfDeclarationMarker(node)) {
+                // Defer exports until we encounter an EndOfDeclarationMarker node
+                const id = getOriginalNodeId(node);
+                deferredExports[id] = appendExportsOfImportDeclaration(deferredExports[id], node);
+            }
+            else {
+                statements = appendExportsOfImportDeclaration(statements, node);
+            }
+
             return singleOrMany(statements);
         }
 
-        function visitImportEqualsDeclaration(node: ImportEqualsDeclaration): VisitResult<Statement> {
-            if (!contains(externalImports, node)) {
-                return undefined;
+        /**
+         * Creates a `require()` call to import an external module.
+         *
+         * @param importNode The declararation to import.
+         */
+        function createRequireCall(importNode: ImportDeclaration | ImportEqualsDeclaration | ExportDeclaration) {
+            const moduleName = getExternalModuleNameLiteral(importNode, currentSourceFile, host, resolver, compilerOptions);
+            const args: Expression[] = [];
+            if (moduleName) {
+                args.push(moduleName);
             }
 
-            // Set emitFlags on the name of the importEqualsDeclaration
-            // This is so the printer will not substitute the identifier
-            setEmitFlags(node.name, EmitFlags.NoSubstitution);
-            const statements: Statement[] = [];
+            return createCall(createIdentifier("require"), /*typeArguments*/ undefined, args);
+        }
+
+        /**
+         * Visits an ImportEqualsDeclaration node.
+         *
+         * @param node The node to visit.
+         */
+        function visitImportEqualsDeclaration(node: ImportEqualsDeclaration): VisitResult<Statement> {
+            Debug.assert(isExternalModuleImportEqualsDeclaration(node), "import= for internal module references should be handled in an earlier transformer.");
+
+            let statements: Statement[];
             if (moduleKind !== ModuleKind.AMD) {
                 if (hasModifier(node, ModifierFlags.Export)) {
-                    statements.push(
-                        createStatement(
-                            createExportAssignment(
-                                node.name,
-                                createRequireCall(node)
+                    statements = append(statements,
+                        setTextRange(
+                            createStatement(
+                                createExportExpression(
+                                    node.name,
+                                    createRequireCall(node)
+                                )
                             ),
-                            /*location*/ node
+                            node
                         )
                     );
                 }
                 else {
-                    statements.push(
-                        createVariableStatement(
-                            /*modifiers*/ undefined,
-                            createVariableDeclarationList([
-                                createVariableDeclaration(
-                                    getSynthesizedClone(node.name),
-                                    /*type*/ undefined,
-                                    createRequireCall(node)
+                    statements = append(statements,
+                        setTextRange(
+                            createVariableStatement(
+                                /*modifiers*/ undefined,
+                                createVariableDeclarationList(
+                                    [
+                                        createVariableDeclaration(
+                                            getSynthesizedClone(node.name),
+                                            /*type*/ undefined,
+                                            createRequireCall(node)
+                                        )
+                                    ],
+                                    /*flags*/ languageVersion >= ScriptTarget.ES2015 ? NodeFlags.Const : NodeFlags.None
                                 )
-                            ],
-                            /*location*/ undefined,
-                            /*flags*/ languageVersion >= ScriptTarget.ES6 ? NodeFlags.Const : NodeFlags.None),
-                            /*location*/ node
+                            ),
+                            node
                         )
                     );
                 }
             }
             else {
                 if (hasModifier(node, ModifierFlags.Export)) {
-                    statements.push(
-                        createStatement(
-                            createExportAssignment(node.name, node.name),
-                            /*location*/ node
+                    statements = append(statements,
+                        setTextRange(
+                            createStatement(
+                                createExportExpression(getExportName(node), getLocalName(node))
+                            ),
+                            node
                         )
                     );
                 }
             }
 
-            addExportImportAssignments(statements, node);
-            return statements;
+            if (hasAssociatedEndOfDeclarationMarker(node)) {
+                // Defer exports until we encounter an EndOfDeclarationMarker node
+                const id = getOriginalNodeId(node);
+                deferredExports[id] = appendExportsOfImportEqualsDeclaration(deferredExports[id], node);
+            }
+            else {
+                statements = appendExportsOfImportEqualsDeclaration(statements, node);
+            }
+
+            return singleOrMany(statements);
         }
 
+        /**
+         * Visits an ExportDeclaration node.
+         *
+         * @param The node to visit.
+         */
         function visitExportDeclaration(node: ExportDeclaration): VisitResult<Statement> {
-            if (!contains(externalImports, node)) {
+            if (!node.moduleSpecifier) {
+                // Elide export declarations with no module specifier as they are handled
+                // elsewhere.
                 return undefined;
             }
 
             const generatedName = getGeneratedNameForNode(node);
+
             if (node.exportClause) {
                 const statements: Statement[] = [];
                 // export { x, y } from "mod";
                 if (moduleKind !== ModuleKind.AMD) {
                     statements.push(
-                        createVariableStatement(
-                            /*modifiers*/ undefined,
-                            createVariableDeclarationList([
-                                createVariableDeclaration(
-                                    generatedName,
-                                    /*type*/ undefined,
-                                    createRequireCall(node)
-                                )
-                            ]),
+                        setTextRange(
+                            createVariableStatement(
+                                /*modifiers*/ undefined,
+                                createVariableDeclarationList([
+                                    createVariableDeclaration(
+                                        generatedName,
+                                        /*type*/ undefined,
+                                        createRequireCall(node)
+                                    )
+                                ])
+                            ),
                             /*location*/ node
                         )
                     );
                 }
                 for (const specifier of node.exportClause.elements) {
-                    if (resolver.isValueAliasDeclaration(specifier)) {
-                        const exportedValue = createPropertyAccess(
-                            generatedName,
-                            specifier.propertyName || specifier.name
-                        );
-                        statements.push(
+                    const exportedValue = createPropertyAccess(
+                        generatedName,
+                        specifier.propertyName || specifier.name
+                    );
+                    statements.push(
+                        setTextRange(
                             createStatement(
-                                createExportAssignment(specifier.name, exportedValue),
-                                /*location*/ specifier
-                            )
-                        );
-                    }
+                                createExportExpression(getExportName(specifier), exportedValue)
+                            ),
+                            specifier
+                        )
+                    );
                 }
 
                 return singleOrMany(statements);
             }
-            else if (resolver.moduleExportsSomeValue(node.moduleSpecifier)) {
+            else {
                 // export * from "mod";
-                return createStatement(
-                    createCall(
-                        createIdentifier("__export"),
-                        /*typeArguments*/ undefined,
-                        [
-                            moduleKind !== ModuleKind.AMD
-                                ? createRequireCall(node)
-                                : generatedName
-                        ]
+                return setTextRange(
+                    createStatement(
+                        createExportStarHelper(context, moduleKind !== ModuleKind.AMD ? createRequireCall(node) : generatedName)
                     ),
-                    /*location*/ node
+                    node
                 );
             }
         }
 
+        /**
+         * Visits an ExportAssignment node.
+         *
+         * @param node The node to visit.
+         */
         function visitExportAssignment(node: ExportAssignment): VisitResult<Statement> {
-            if (!node.isExportEquals) {
-                if (nodeIsSynthesized(node) || resolver.isValueAliasDeclaration(node)) {
-                    const statements: Statement[] = [];
-                    addExportDefault(statements, node.expression, /*location*/ node);
-                    return statements;
-                }
+            if (node.isExportEquals) {
+                return undefined;
             }
 
-            return undefined;
-        }
+            let statements: Statement[];
+            const original = node.original;
+            if (original && hasAssociatedEndOfDeclarationMarker(original)) {
+                // Defer exports until we encounter an EndOfDeclarationMarker node
+                const id = getOriginalNodeId(node);
+                deferredExports[id] = appendExportStatement(deferredExports[id], createIdentifier("default"), node.expression, /*location*/ node, /*allowComments*/ true);
+            }
+            else {
+                statements = appendExportStatement(statements, createIdentifier("default"), node.expression, /*location*/ node, /*allowComments*/ true);
+            }
 
-        function addExportDefault(statements: Statement[], expression: Expression, location: TextRange): void {
-            tryAddExportDefaultCompat(statements);
+            return singleOrMany(statements);
+        }
 
-            statements.push(
-                createStatement(
-                    createExportAssignment(
-                        createIdentifier("default"),
-                        expression
-                    ),
-                    location
-                )
-            );
-        }
-
-        function tryAddExportDefaultCompat(statements: Statement[]) {
-            const original = getOriginalNode(currentSourceFile);
-            Debug.assert(original.kind === SyntaxKind.SourceFile);
-
-            if (!original.symbol.exports["___esModule"]) {
-                if (languageVersion === ScriptTarget.ES3) {
-                    statements.push(
-                        createStatement(
-                            createExportAssignment(
-                                createIdentifier("__esModule"),
-                                createLiteral(true)
-                            )
-                        )
-                    );
-                }
-                else {
-                    statements.push(
-                        createStatement(
-                            createCall(
-                                createPropertyAccess(createIdentifier("Object"), "defineProperty"),
-                                /*typeArguments*/ undefined,
-                                [
-                                    createIdentifier("exports"),
-                                    createLiteral("__esModule"),
-                                    createObjectLiteral([
-                                        createPropertyAssignment("value", createLiteral(true))
-                                    ])
-                                ]
-                            )
-                        )
-                    );
-                }
-            }
-        }
-
-        function addExportImportAssignments(statements: Statement[], node: ImportEqualsDeclaration | ImportDeclaration) {
-            if (isImportEqualsDeclaration(node)) {
-                addExportMemberAssignments(statements, node.name);
+        /**
+         * Visits a FunctionDeclaration node.
+         *
+         * @param node The node to visit.
+         */
+        function visitFunctionDeclaration(node: FunctionDeclaration): VisitResult<Statement> {
+            let statements: Statement[];
+            if (hasModifier(node, ModifierFlags.Export)) {
+                statements = append(statements,
+                    setOriginalNode(
+                        setTextRange(
+                            createFunctionDeclaration(
+                                /*decorators*/ undefined,
+                                visitNodes(node.modifiers, modifierVisitor, isModifier),
+                                node.asteriskToken,
+                                getDeclarationName(node, /*allowComments*/ true, /*allowSourceMaps*/ true),
+                                /*typeParameters*/ undefined,
+                                visitNodes(node.parameters, importCallExpressionVisitor),
+                                /*type*/ undefined,
+                                visitEachChild(node.body, importCallExpressionVisitor, context)
+                            ),
+                            /*location*/ node
+                        ),
+                        /*original*/ node
+                    )
+                );
             }
             else {
-                const names = reduceEachChild(node, collectExportMembers, []);
-                for (const name of names) {
-                    addExportMemberAssignments(statements, name);
-                }
+                statements = append(statements, visitEachChild(node, importCallExpressionVisitor, context));
             }
-        }
 
-        function collectExportMembers(names: Identifier[], node: Node): Identifier[] {
-            if (isAliasSymbolDeclaration(node) && resolver.isValueAliasDeclaration(node) && isDeclaration(node)) {
-                const name = node.name;
-                if (isIdentifier(name)) {
-                    names.push(name);
-                }
+            if (hasAssociatedEndOfDeclarationMarker(node)) {
+                // Defer exports until we encounter an EndOfDeclarationMarker node
+                const id = getOriginalNodeId(node);
+                deferredExports[id] = appendExportsOfHoistedDeclaration(deferredExports[id], node);
+            }
+            else {
+                statements = appendExportsOfHoistedDeclaration(statements, node);
             }
 
-            return reduceEachChild(node, collectExportMembers, names);
+            return singleOrMany(statements);
         }
 
-        function addExportMemberAssignments(statements: Statement[], name: Identifier): void {
-            if (!exportEquals && exportSpecifiers && hasProperty(exportSpecifiers, name.text)) {
-                for (const specifier of exportSpecifiers[name.text]) {
-                    statements.push(
-                        startOnNewLine(
-                            createStatement(
-                                createExportAssignment(specifier.name, name),
-                                /*location*/ specifier.name
-                            )
-                        )
-                    );
-                }
+        /**
+         * Visits a ClassDeclaration node.
+         *
+         * @param node The node to visit.
+         */
+        function visitClassDeclaration(node: ClassDeclaration): VisitResult<Statement> {
+            let statements: Statement[];
+            if (hasModifier(node, ModifierFlags.Export)) {
+                statements = append(statements,
+                    setOriginalNode(
+                        setTextRange(
+                            createClassDeclaration(
+                                /*decorators*/ undefined,
+                                visitNodes(node.modifiers, modifierVisitor, isModifier),
+                                getDeclarationName(node, /*allowComments*/ true, /*allowSourceMaps*/ true),
+                                /*typeParameters*/ undefined,
+                                visitNodes(node.heritageClauses, importCallExpressionVisitor),
+                                node.members
+                            ),
+                            node
+                        ),
+                        node
+                    )
+                );
+            }
+            else {
+                statements = append(statements, visitEachChild(node, importCallExpressionVisitor, context));
             }
-        }
 
-        function addExportMemberAssignment(statements: Statement[], node: DeclarationStatement) {
-            if (hasModifier(node, ModifierFlags.Default)) {
-                addExportDefault(statements, getDeclarationName(node), /*location*/ node);
+            if (hasAssociatedEndOfDeclarationMarker(node)) {
+                // Defer exports until we encounter an EndOfDeclarationMarker node
+                const id = getOriginalNodeId(node);
+                deferredExports[id] = appendExportsOfHoistedDeclaration(deferredExports[id], node);
             }
             else {
-                statements.push(
-                    createExportStatement(node.name, setEmitFlags(getSynthesizedClone(node.name), EmitFlags.LocalName), /*location*/ node)
-                );
+                statements = appendExportsOfHoistedDeclaration(statements, node);
             }
+
+            return singleOrMany(statements);
         }
 
+        /**
+         * Visits a VariableStatement node.
+         *
+         * @param node The node to visit.
+         */
         function visitVariableStatement(node: VariableStatement): VisitResult<Statement> {
-            // If the variable is for a generated declaration,
-            // we should maintain it and just strip off the 'export' modifier if necessary.
-            const originalKind = getOriginalNode(node).kind;
-            if (originalKind === SyntaxKind.ModuleDeclaration ||
-                originalKind === SyntaxKind.EnumDeclaration ||
-                originalKind === SyntaxKind.ClassDeclaration) {
-
-                if (!hasModifier(node, ModifierFlags.Export)) {
-                    return node;
-                }
+            let statements: Statement[];
+            let variables: VariableDeclaration[];
+            let expressions: Expression[];
 
-                return setOriginalNode(
-                    createVariableStatement(
-                        /*modifiers*/ undefined,
-                        node.declarationList
-                    ),
-                    node
-                );
-            }
+            if (hasModifier(node, ModifierFlags.Export)) {
+                let modifiers: NodeArray<Modifier>;
+
+                // If we're exporting these variables, then these just become assignments to 'exports.x'.
+                // We only want to emit assignments for variables with initializers.
+                for (const variable of node.declarationList.declarations) {
+                    if (isIdentifier(variable.name) && isLocalName(variable.name)) {
+                        if (!modifiers) {
+                            modifiers = visitNodes(node.modifiers, modifierVisitor, isModifier);
+                        }
+
+                        variables = append(variables, variable);
+                    }
+                    else if (variable.initializer) {
+                        expressions = append(expressions, transformInitializedVariable(variable));
+                    }
+                }
 
-            const resultStatements: Statement[] = [];
+                if (variables) {
+                    statements = append(statements, updateVariableStatement(node, modifiers, updateVariableDeclarationList(node.declarationList, variables)));
+                }
 
-            // If we're exporting these variables, then these just become assignments to 'exports.blah'.
-            // We only want to emit assignments for variables with initializers.
-            if (hasModifier(node, ModifierFlags.Export)) {
-                const variables = getInitializedVariables(node.declarationList);
-                if (variables.length > 0) {
-                    const inlineAssignments = createStatement(
-                        inlineExpressions(
-                            map(variables, transformInitializedVariable)
-                        ),
-                        node
-                    );
-                    resultStatements.push(inlineAssignments);
+                if (expressions) {
+                    statements = append(statements, setTextRange(createStatement(inlineExpressions(expressions)), node));
                 }
             }
             else {
-                resultStatements.push(node);
+                statements = append(statements, visitEachChild(node, importCallExpressionVisitor, context));
             }
 
-            // While we might not have been exported here, each variable might have been exported
-            // later on in an export specifier (e.g. `export {foo as blah, bar}`).
-            for (const decl of node.declarationList.declarations) {
-                addExportMemberAssignmentsForBindingName(resultStatements, decl.name);
+            if (hasAssociatedEndOfDeclarationMarker(node)) {
+                // Defer exports until we encounter an EndOfDeclarationMarker node
+                const id = getOriginalNodeId(node);
+                deferredExports[id] = appendExportsOfVariableStatement(deferredExports[id], node);
+            }
+            else {
+                statements = appendExportsOfVariableStatement(statements, node);
             }
 
-            return resultStatements;
+            return singleOrMany(statements);
         }
 
         /**
-         * Creates appropriate assignments for each binding identifier that is exported in an export specifier,
-         * and inserts it into 'resultStatements'.
+         * Transforms an exported variable with an initializer into an expression.
+         *
+         * @param node The node to transform.
          */
-        function addExportMemberAssignmentsForBindingName(resultStatements: Statement[], name: BindingName): void {
-            if (isBindingPattern(name)) {
-                for (const element of name.elements) {
-                    if (!isOmittedExpression(element)) {
-                        addExportMemberAssignmentsForBindingName(resultStatements, element.name);
-                    }
-                }
-            }
-            else {
-                if (!exportEquals && exportSpecifiers && hasProperty(exportSpecifiers, name.text)) {
-                    const sourceFileId = getOriginalNodeId(currentSourceFile);
-                    if (!bindingNameExportSpecifiersForFileMap[sourceFileId]) {
-                        bindingNameExportSpecifiersForFileMap[sourceFileId] = createMap<ExportSpecifier[]>();
-                    }
-                    bindingNameExportSpecifiersForFileMap[sourceFileId][name.text] = exportSpecifiers[name.text];
-                    addExportMemberAssignments(resultStatements, name);
-                }
-            }
-        }
-
         function transformInitializedVariable(node: VariableDeclaration): Expression {
-            const name = node.name;
-            if (isBindingPattern(name)) {
-                return flattenVariableDestructuringToExpression(
+            if (isBindingPattern(node.name)) {
+                return flattenDestructuringAssignment(
+                    visitNode(node, importCallExpressionVisitor),
+                    /*visitor*/ undefined,
                     context,
-                    node,
-                    hoistVariableDeclaration,
-                    getModuleMemberName,
-                    visitor
+                    FlattenLevel.All,
+                    /*needsValue*/ false,
+                    createExportExpression
                 );
             }
             else {
                 return createAssignment(
-                    getModuleMemberName(name),
-                    visitNode(node.initializer, visitor, isExpression)
+                    setTextRange(
+                        createPropertyAccess(
+                            createIdentifier("exports"),
+                            node.name
+                        ),
+                        /*location*/ node.name
+                    ),
+                    visitNode(node.initializer, importCallExpressionVisitor)
                 );
             }
         }
 
-        function visitFunctionDeclaration(node: FunctionDeclaration): VisitResult<Statement> {
-            const statements: Statement[] = [];
-            const name = node.name || getGeneratedNameForNode(node);
-            if (hasModifier(node, ModifierFlags.Export)) {
-                statements.push(
-                    setOriginalNode(
-                        createFunctionDeclaration(
-                            /*decorators*/ undefined,
-                            /*modifiers*/ undefined,
-                            node.asteriskToken,
-                            name,
-                            /*typeParameters*/ undefined,
-                            node.parameters,
-                            /*type*/ undefined,
-                            node.body,
-                            /*location*/ node
-                        ),
-                        /*original*/ node
-                    )
-                );
-
-                addExportMemberAssignment(statements, node);
-            }
-            else {
-                statements.push(node);
+        /**
+         * Visits a MergeDeclarationMarker used as a placeholder for the beginning of a merged
+         * and transformed declaration.
+         *
+         * @param node The node to visit.
+         */
+        function visitMergeDeclarationMarker(node: MergeDeclarationMarker): VisitResult<Statement> {
+            // For an EnumDeclaration or ModuleDeclaration that merges with a preceeding
+            // declaration we do not emit a leading variable declaration. To preserve the
+            // begin/end semantics of the declararation and to properly handle exports
+            // we wrapped the leading variable declaration in a `MergeDeclarationMarker`.
+            //
+            // To balance the declaration, add the exports of the elided variable
+            // statement.
+            if (hasAssociatedEndOfDeclarationMarker(node) && node.original.kind === SyntaxKind.VariableStatement) {
+                const id = getOriginalNodeId(node);
+                deferredExports[id] = appendExportsOfVariableStatement(deferredExports[id], <VariableStatement>node.original);
             }
 
-            if (node.name) {
-                addExportMemberAssignments(statements, node.name);
+            return node;
+        }
+
+        /**
+         * Determines whether a node has an associated EndOfDeclarationMarker.
+         *
+         * @param node The node to test.
+         */
+        function hasAssociatedEndOfDeclarationMarker(node: Node) {
+            return (getEmitFlags(node) & EmitFlags.HasEndOfDeclarationMarker) !== 0;
+        }
+
+        /**
+         * Visits a DeclarationMarker used as a placeholder for the end of a transformed
+         * declaration.
+         *
+         * @param node The node to visit.
+         */
+        function visitEndOfDeclarationMarker(node: EndOfDeclarationMarker): VisitResult<Statement> {
+            // For some transformations we emit an `EndOfDeclarationMarker` to mark the actual
+            // end of the transformed declaration. We use this marker to emit any deferred exports
+            // of the declaration.
+            const id = getOriginalNodeId(node);
+            const statements = deferredExports[id];
+            if (statements) {
+                delete deferredExports[id];
+                return append(statements, node);
             }
 
-            return singleOrMany(statements);
+            return node;
         }
 
-        function visitClassDeclaration(node: ClassDeclaration): VisitResult<Statement> {
-            const statements: Statement[] = [];
-            const name = node.name || getGeneratedNameForNode(node);
-            if (hasModifier(node, ModifierFlags.Export)) {
-                statements.push(
-                    setOriginalNode(
-                        createClassDeclaration(
-                            /*decorators*/ undefined,
-                            /*modifiers*/ undefined,
-                            name,
-                            /*typeParameters*/ undefined,
-                            node.heritageClauses,
-                            node.members,
-                            /*location*/ node
-                        ),
-                        /*original*/ node
-                    )
-                );
+        /**
+         * Appends the exports of an ImportDeclaration to a statement list, returning the
+         * statement list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param decl The declaration whose exports are to be recorded.
+         */
+        function appendExportsOfImportDeclaration(statements: Statement[] | undefined, decl: ImportDeclaration): Statement[] | undefined {
+            if (currentModuleInfo.exportEquals) {
+                return statements;
+            }
 
-                addExportMemberAssignment(statements, node);
+            const importClause = decl.importClause;
+            if (!importClause) {
+                return statements;
             }
-            else {
-                statements.push(node);
+
+            if (importClause.name) {
+                statements = appendExportsOfDeclaration(statements, importClause);
             }
 
-            // Decorators end up creating a series of assignment expressions which overwrite
-            // the local binding that we export, so we need to defer from exporting decorated classes
-            // until the decoration assignments take place. We do this when visiting expression-statements.
-            if (node.name && !(node.decorators && node.decorators.length)) {
-                addExportMemberAssignments(statements, node.name);
+            const namedBindings = importClause.namedBindings;
+            if (namedBindings) {
+                switch (namedBindings.kind) {
+                    case SyntaxKind.NamespaceImport:
+                        statements = appendExportsOfDeclaration(statements, namedBindings);
+                        break;
+
+                    case SyntaxKind.NamedImports:
+                        for (const importBinding of namedBindings.elements) {
+                            statements = appendExportsOfDeclaration(statements, importBinding);
+                        }
+
+                        break;
+                }
             }
 
-            return singleOrMany(statements);
+            return statements;
         }
 
-        function visitExpressionStatement(node: ExpressionStatement): VisitResult<Statement> {
-            const original = getOriginalNode(node);
-            const origKind = original.kind;
+        /**
+         * Appends the exports of an ImportEqualsDeclaration to a statement list, returning the
+         * statement list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param decl The declaration whose exports are to be recorded.
+         */
+        function appendExportsOfImportEqualsDeclaration(statements: Statement[] | undefined, decl: ImportEqualsDeclaration): Statement[] | undefined {
+            if (currentModuleInfo.exportEquals) {
+                return statements;
+            }
+
+            return appendExportsOfDeclaration(statements, decl);
+        }
 
-            if (origKind === SyntaxKind.EnumDeclaration || origKind === SyntaxKind.ModuleDeclaration) {
-                return visitExpressionStatementForEnumOrNamespaceDeclaration(node, <EnumDeclaration | ModuleDeclaration>original);
+        /**
+         * Appends the exports of a VariableStatement to a statement list, returning the statement
+         * list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param node The VariableStatement whose exports are to be recorded.
+         */
+        function appendExportsOfVariableStatement(statements: Statement[] | undefined, node: VariableStatement): Statement[] | undefined {
+            if (currentModuleInfo.exportEquals) {
+                return statements;
             }
-            else if (origKind === SyntaxKind.ClassDeclaration) {
-                // The decorated assignment for a class name may need to be transformed.
-                const classDecl = original as ClassDeclaration;
-                if (classDecl.name) {
-                    const statements = [node];
-                    addExportMemberAssignments(statements, classDecl.name);
-                    return statements;
+
+            for (const decl of node.declarationList.declarations) {
+                statements = appendExportsOfBindingElement(statements, decl);
+            }
+
+            return statements;
+        }
+
+        /**
+         * Appends the exports of a VariableDeclaration or BindingElement to a statement list,
+         * returning the statement list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param decl The declaration whose exports are to be recorded.
+         */
+        function appendExportsOfBindingElement(statements: Statement[] | undefined, decl: VariableDeclaration | BindingElement): Statement[] | undefined {
+            if (currentModuleInfo.exportEquals) {
+                return statements;
+            }
+
+            if (isBindingPattern(decl.name)) {
+                for (const element of decl.name.elements) {
+                    if (!isOmittedExpression(element)) {
+                        statements = appendExportsOfBindingElement(statements, element);
+                    }
                 }
             }
+            else if (!isGeneratedIdentifier(decl.name)) {
+                statements = appendExportsOfDeclaration(statements, decl);
+            }
 
-            return node;
+            return statements;
         }
 
-        function visitExpressionStatementForEnumOrNamespaceDeclaration(node: ExpressionStatement, original: EnumDeclaration | ModuleDeclaration): VisitResult<Statement> {
-            const statements: Statement[] = [node];
+        /**
+         * Appends the exports of a ClassDeclaration or FunctionDeclaration to a statement list,
+         * returning the statement list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param decl The declaration whose exports are to be recorded.
+         */
+        function appendExportsOfHoistedDeclaration(statements: Statement[] | undefined, decl: ClassDeclaration | FunctionDeclaration): Statement[] | undefined {
+            if (currentModuleInfo.exportEquals) {
+                return statements;
+            }
+
+            if (hasModifier(decl, ModifierFlags.Export)) {
+                const exportName = hasModifier(decl, ModifierFlags.Default) ? createIdentifier("default") : decl.name;
+                statements = appendExportStatement(statements, exportName, getLocalName(decl), /*location*/ decl);
+            }
 
-            // Preserve old behavior for enums in which a variable statement is emitted after the body itself.
-            if (hasModifier(original, ModifierFlags.Export) &&
-                original.kind === SyntaxKind.EnumDeclaration &&
-                isFirstDeclarationOfKind(original, SyntaxKind.EnumDeclaration)) {
-                addVarForExportedEnumOrNamespaceDeclaration(statements, original);
+            if (decl.name) {
+                statements = appendExportsOfDeclaration(statements, decl);
             }
 
-            addExportMemberAssignments(statements, original.name);
+            return statements;
+        }
 
+        /**
+         * Appends the exports of a declaration to a statement list, returning the statement list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param decl The declaration to export.
+         */
+        function appendExportsOfDeclaration(statements: Statement[] | undefined, decl: Declaration): Statement[] | undefined {
+            const name = getDeclarationName(decl);
+            const exportSpecifiers = currentModuleInfo.exportSpecifiers.get(name.text);
+            if (exportSpecifiers) {
+                for (const exportSpecifier of exportSpecifiers) {
+                    statements = appendExportStatement(statements, exportSpecifier.name, name, /*location*/ exportSpecifier.name);
+                }
+            }
             return statements;
         }
 
         /**
-         * Adds a trailing VariableStatement for an enum or module declaration.
+         * Appends the down-level representation of an export to a statement list, returning the
+         * statement list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param exportName The name of the export.
+         * @param expression The expression to export.
+         * @param location The location to use for source maps and comments for the export.
+         * @param allowComments Whether to allow comments on the export.
          */
-        function addVarForExportedEnumOrNamespaceDeclaration(statements: Statement[], node: EnumDeclaration | ModuleDeclaration) {
-            const transformedStatement = createVariableStatement(
-                /*modifiers*/ undefined,
-                [createVariableDeclaration(
-                    getDeclarationName(node),
-                        /*type*/ undefined,
-                    createPropertyAccess(createIdentifier("exports"), getDeclarationName(node))
-                )],
-                    /*location*/ node
+        function appendExportStatement(statements: Statement[] | undefined, exportName: Identifier, expression: Expression, location?: TextRange, allowComments?: boolean): Statement[] | undefined {
+            statements = append(statements, createExportStatement(exportName, expression, location, allowComments));
+            return statements;
+        }
+
+        function createUnderscoreUnderscoreESModule() {
+            let statement: Statement;
+            if (languageVersion === ScriptTarget.ES3) {
+                statement = createStatement(
+                    createExportExpression(
+                        createIdentifier("__esModule"),
+                        createLiteral(/*value*/ true)
+                    )
+                );
+            }
+            else {
+                statement = createStatement(
+                    createCall(
+                        createPropertyAccess(createIdentifier("Object"), "defineProperty"),
+                        /*typeArguments*/ undefined,
+                        [
+                            createIdentifier("exports"),
+                            createLiteral("__esModule"),
+                            createObjectLiteral([
+                                createPropertyAssignment("value", createLiteral(/*value*/ true))
+                            ])
+                        ]
+                    )
+                );
+            }
+            setEmitFlags(statement, EmitFlags.CustomPrologue);
+            return statement;
+        }
+
+        /**
+         * Creates a call to the current file's export function to export a value.
+         *
+         * @param name The bound name of the export.
+         * @param value The exported value.
+         * @param location The location to use for source maps and comments for the export.
+         * @param allowComments An optional value indicating whether to emit comments for the statement.
+         */
+        function createExportStatement(name: Identifier, value: Expression, location?: TextRange, allowComments?: boolean) {
+            const statement = setTextRange(createStatement(createExportExpression(name, value)), location);
+            startOnNewLine(statement);
+            if (!allowComments) {
+                setEmitFlags(statement, EmitFlags.NoComments);
+            }
+
+            return statement;
+        }
+
+        /**
+         * Creates a call to the current file's export function to export a value.
+         *
+         * @param name The bound name of the export.
+         * @param value The exported value.
+         * @param location The location to use for source maps and comments for the export.
+         */
+        function createExportExpression(name: Identifier, value: Expression, location?: TextRange) {
+            return setTextRange(
+                createAssignment(
+                    createPropertyAccess(
+                        createIdentifier("exports"),
+                        getSynthesizedClone(name)
+                    ),
+                    value
+                ),
+                location
             );
-            setEmitFlags(transformedStatement, EmitFlags.NoComments);
-            statements.push(transformedStatement);
         }
 
-        function getDeclarationName(node: DeclarationStatement) {
-            return node.name ? getSynthesizedClone(node.name) : getGeneratedNameForNode(node);
+        //
+        // Modifier Visitors
+        //
+
+        /**
+         * Visit nodes to elide module-specific modifiers.
+         *
+         * @param node The node to visit.
+         */
+        function modifierVisitor(node: Node): VisitResult<Node> {
+            // Elide module-specific modifiers.
+            switch (node.kind) {
+                case SyntaxKind.ExportKeyword:
+                case SyntaxKind.DefaultKeyword:
+                    return undefined;
+            }
+
+            return node;
         }
 
-        function onEmitNode(emitContext: EmitContext, node: Node, emitCallback: (emitContext: EmitContext, node: Node) => void): void {
+        //
+        // Emit Notification
+        //
+
+        /**
+         * Hook for node emit notifications.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to emit.
+         * @param emit A callback used to emit the node in the printer.
+         */
+        function onEmitNode(hint: EmitHint, node: Node, emitCallback: (hint: EmitHint, node: Node) => void): void {
             if (node.kind === SyntaxKind.SourceFile) {
-                bindingNameExportSpecifiersMap = bindingNameExportSpecifiersForFileMap[getOriginalNodeId(node)];
-                previousOnEmitNode(emitContext, node, emitCallback);
-                bindingNameExportSpecifiersMap = undefined;
+                currentSourceFile = <SourceFile>node;
+                currentModuleInfo = moduleInfoMap[getOriginalNodeId(currentSourceFile)];
+                noSubstitution = [];
+
+                previousOnEmitNode(hint, node, emitCallback);
+
+                currentSourceFile = undefined;
+                currentModuleInfo = undefined;
+                noSubstitution = undefined;
             }
             else {
-                previousOnEmitNode(emitContext, node, emitCallback);
+                previousOnEmitNode(hint, node, emitCallback);
             }
         }
 
+        //
+        // Substitutions
+        //
+
         /**
          * Hooks node substitutions.
          *
+         * @param hint A hint as to the intended usage of the node.
          * @param node The node to substitute.
-         * @param isExpression A value indicating whether the node is to be used in an expression
-         *                     position.
          */
-        function onSubstituteNode(emitContext: EmitContext, node: Node) {
-            node = previousOnSubstituteNode(emitContext, node);
-            if (emitContext === EmitContext.Expression) {
+        function onSubstituteNode(hint: EmitHint, node: Node) {
+            node = previousOnSubstituteNode(hint, node);
+            if (node.id && noSubstitution[node.id]) {
+                return node;
+            }
+
+            if (hint === EmitHint.Expression) {
                 return substituteExpression(<Expression>node);
             }
             else if (isShorthandPropertyAssignment(node)) {
                 return substituteShorthandPropertyAssignment(node);
             }
+
             return node;
         }
 
+        /**
+         * Substitution for a ShorthandPropertyAssignment whose declaration name is an imported
+         * or exported symbol.
+         *
+         * @param node The node to substitute.
+         */
         function substituteShorthandPropertyAssignment(node: ShorthandPropertyAssignment): ObjectLiteralElementLike {
             const name = node.name;
             const exportedOrImportedName = substituteExpressionIdentifier(name);
@@ -859,13 +1406,18 @@ namespace ts {
                 // destructuring assignment
                 if (node.objectAssignmentInitializer) {
                     const initializer = createAssignment(exportedOrImportedName, node.objectAssignmentInitializer);
-                    return createPropertyAssignment(name, initializer, /*location*/ node);
+                    return setTextRange(createPropertyAssignment(name, initializer), node);
                 }
-                return createPropertyAssignment(name, exportedOrImportedName, /*location*/ node);
+                return setTextRange(createPropertyAssignment(name, exportedOrImportedName), node);
             }
             return node;
         }
 
+        /**
+         * Substitution for an Expression that may contain an imported or exported symbol.
+         *
+         * @param node The node to substitute.
+         */
         function substituteExpression(node: Expression) {
             switch (node.kind) {
                 case SyntaxKind.Identifier:
@@ -880,220 +1432,180 @@ namespace ts {
             return node;
         }
 
+        /**
+         * Substitution for an Identifier expression that may contain an imported or exported
+         * symbol.
+         *
+         * @param node The node to substitute.
+         */
         function substituteExpressionIdentifier(node: Identifier): Expression {
-            return trySubstituteExportedName(node)
-                || trySubstituteImportedName(node)
-                || node;
-        }
-
-        function substituteBinaryExpression(node: BinaryExpression): Expression {
-            const left = node.left;
-            // If the left-hand-side of the binaryExpression is an identifier and its is export through export Specifier
-            if (isIdentifier(left) && isAssignmentOperator(node.operatorToken.kind)) {
-                if (bindingNameExportSpecifiersMap && hasProperty(bindingNameExportSpecifiersMap, left.text)) {
-                    setEmitFlags(node, EmitFlags.NoSubstitution);
-                    let nestedExportAssignment: BinaryExpression;
-                    for (const specifier of bindingNameExportSpecifiersMap[left.text]) {
-                        nestedExportAssignment = nestedExportAssignment ?
-                            createExportAssignment(specifier.name, nestedExportAssignment) :
-                            createExportAssignment(specifier.name, node);
-                    }
-                    return nestedExportAssignment;
+            if (getEmitFlags(node) & EmitFlags.HelperName) {
+                const externalHelpersModuleName = getExternalHelpersModuleName(currentSourceFile);
+                if (externalHelpersModuleName) {
+                    return createPropertyAccess(externalHelpersModuleName, node);
                 }
+
+                return node;
             }
-            return node;
-        }
 
-        function substituteUnaryExpression(node: PrefixUnaryExpression | PostfixUnaryExpression): Expression {
-            // Because how the compiler only parse plusplus and minusminus to be either prefixUnaryExpression or postFixUnaryExpression depended on where they are
-            // We don't need to check that the operator has SyntaxKind.plusplus or SyntaxKind.minusminus
-            const operator = node.operator;
-            const operand = node.operand;
-            if (isIdentifier(operand) && bindingNameExportSpecifiersForFileMap) {
-                if (bindingNameExportSpecifiersMap && hasProperty(bindingNameExportSpecifiersMap, operand.text)) {
-                    setEmitFlags(node, EmitFlags.NoSubstitution);
-                    let transformedUnaryExpression: BinaryExpression;
-                    if (node.kind === SyntaxKind.PostfixUnaryExpression) {
-                        transformedUnaryExpression = createBinary(
-                            operand,
-                            createNode(operator === SyntaxKind.PlusPlusToken ? SyntaxKind.PlusEqualsToken : SyntaxKind.MinusEqualsToken),
-                            createLiteral(1),
+            if (!isGeneratedIdentifier(node) && !isLocalName(node)) {
+                const exportContainer = resolver.getReferencedExportContainer(node, isExportName(node));
+                if (exportContainer && exportContainer.kind === SyntaxKind.SourceFile) {
+                    return setTextRange(
+                        createPropertyAccess(
+                            createIdentifier("exports"),
+                            getSynthesizedClone(node)
+                        ),
+                        /*location*/ node
+                    );
+                }
+
+                const importDeclaration = resolver.getReferencedImportDeclaration(node);
+                if (importDeclaration) {
+                    if (isImportClause(importDeclaration)) {
+                        return setTextRange(
+                            createPropertyAccess(
+                                getGeneratedNameForNode(importDeclaration.parent),
+                                createIdentifier("default")
+                            ),
                             /*location*/ node
                         );
-                        // We have to set no substitution flag here to prevent visit the binary expression and substitute it again as we will preform all necessary substitution in here
-                        setEmitFlags(transformedUnaryExpression, EmitFlags.NoSubstitution);
-                    }
-                    let nestedExportAssignment: BinaryExpression;
-                    for (const specifier of bindingNameExportSpecifiersMap[operand.text]) {
-                        nestedExportAssignment = nestedExportAssignment ?
-                            createExportAssignment(specifier.name, nestedExportAssignment) :
-                            createExportAssignment(specifier.name, transformedUnaryExpression || node);
                     }
-                    return nestedExportAssignment;
-                }
-            }
-            return node;
-        }
-
-        function trySubstituteExportedName(node: Identifier) {
-            const emitFlags = getEmitFlags(node);
-            if ((emitFlags & EmitFlags.LocalName) === 0) {
-                const container = resolver.getReferencedExportContainer(node, (emitFlags & EmitFlags.ExportName) !== 0);
-                if (container) {
-                    if (container.kind === SyntaxKind.SourceFile) {
-                        return createPropertyAccess(
-                            createIdentifier("exports"),
-                            getSynthesizedClone(node),
+                    else if (isImportSpecifier(importDeclaration)) {
+                        const name = importDeclaration.propertyName || importDeclaration.name;
+                        return setTextRange(
+                            createPropertyAccess(
+                                getGeneratedNameForNode(importDeclaration.parent.parent.parent),
+                                getSynthesizedClone(name)
+                            ),
                             /*location*/ node
                         );
                     }
                 }
             }
-
-            return undefined;
+            return node;
         }
 
-        function trySubstituteImportedName(node: Identifier): Expression {
-            if ((getEmitFlags(node) & EmitFlags.LocalName) === 0) {
-                const declaration = resolver.getReferencedImportDeclaration(node);
-                if (declaration) {
-                    if (isImportClause(declaration)) {
-                        if (languageVersion >= ScriptTarget.ES5) {
-                            return createPropertyAccess(
-                                getGeneratedNameForNode(declaration.parent),
-                                createIdentifier("default"),
-                                /*location*/ node
-                            );
-                        }
-                        else {
-                            // TODO: ES3 transform to handle x.default -> x["default"]
-                            return createElementAccess(
-                                getGeneratedNameForNode(declaration.parent),
-                                createLiteral("default"),
-                                /*location*/ node
-                            );
-                        }
-                    }
-                    else if (isImportSpecifier(declaration)) {
-                        const name = declaration.propertyName || declaration.name;
-                        if (name.originalKeywordKind === SyntaxKind.DefaultKeyword && languageVersion <= ScriptTarget.ES3) {
-                            // TODO: ES3 transform to handle x.default -> x["default"]
-                            return createElementAccess(
-                                getGeneratedNameForNode(declaration.parent.parent.parent),
-                                createLiteral(name.text),
-                                /*location*/ node
-                            );
-                        }
-                        else {
-                            return createPropertyAccess(
-                                getGeneratedNameForNode(declaration.parent.parent.parent),
-                                getSynthesizedClone(name),
-                                /*location*/ node
-                            );
-                        }
+        /**
+         * Substitution for a BinaryExpression that may contain an imported or exported symbol.
+         *
+         * @param node The node to substitute.
+         */
+        function substituteBinaryExpression(node: BinaryExpression): Expression {
+            // When we see an assignment expression whose left-hand side is an exported symbol,
+            // we should ensure all exports of that symbol are updated with the correct value.
+            //
+            // - We do not substitute generated identifiers for any reason.
+            // - We do not substitute identifiers tagged with the LocalName flag.
+            // - We do not substitute identifiers that were originally the name of an enum or
+            //   namespace due to how they are transformed in TypeScript.
+            // - We only substitute identifiers that are exported at the top level.
+            if (isAssignmentOperator(node.operatorToken.kind)
+                && isIdentifier(node.left)
+                && !isGeneratedIdentifier(node.left)
+                && !isLocalName(node.left)
+                && !isDeclarationNameOfEnumOrNamespace(node.left)) {
+                const exportedNames = getExports(node.left);
+                if (exportedNames) {
+                    // For each additional export of the declaration, apply an export assignment.
+                    let expression: Expression = node;
+                    for (const exportName of exportedNames) {
+                        // Mark the node to prevent triggering this rule again.
+                        noSubstitution[getNodeId(expression)] = true;
+                        expression = createExportExpression(exportName, expression, /*location*/ node);
                     }
+
+                    return expression;
                 }
             }
-            return undefined;
-        }
 
-        function getModuleMemberName(name: Identifier) {
-            return createPropertyAccess(
-                createIdentifier("exports"),
-                name,
-                /*location*/ name
-            );
+            return node;
         }
 
-        function createRequireCall(importNode: ImportDeclaration | ImportEqualsDeclaration | ExportDeclaration) {
-            const moduleName = getExternalModuleNameLiteral(importNode, currentSourceFile, host, resolver, compilerOptions);
-            const args: Expression[] = [];
-            if (isDefined(moduleName)) {
-                args.push(moduleName);
-            }
-
-            return createCall(createIdentifier("require"), /*typeArguments*/ undefined, args);
-        }
+        /**
+         * Substitution for a UnaryExpression that may contain an imported or exported symbol.
+         *
+         * @param node The node to substitute.
+         */
+        function substituteUnaryExpression(node: PrefixUnaryExpression | PostfixUnaryExpression): Expression {
+            // When we see a prefix or postfix increment expression whose operand is an exported
+            // symbol, we should ensure all exports of that symbol are updated with the correct
+            // value.
+            //
+            // - We do not substitute generated identifiers for any reason.
+            // - We do not substitute identifiers tagged with the LocalName flag.
+            // - We do not substitute identifiers that were originally the name of an enum or
+            //   namespace due to how they are transformed in TypeScript.
+            // - We only substitute identifiers that are exported at the top level.
+            if ((node.operator === SyntaxKind.PlusPlusToken || node.operator === SyntaxKind.MinusMinusToken)
+                && isIdentifier(node.operand)
+                && !isGeneratedIdentifier(node.operand)
+                && !isLocalName(node.operand)
+                && !isDeclarationNameOfEnumOrNamespace(node.operand)) {
+                const exportedNames = getExports(node.operand);
+                if (exportedNames) {
+                    let expression: Expression = node.kind === SyntaxKind.PostfixUnaryExpression
+                        ? setTextRange(
+                            createBinary(
+                                node.operand,
+                                createToken(node.operator === SyntaxKind.PlusPlusToken ? SyntaxKind.PlusEqualsToken : SyntaxKind.MinusEqualsToken),
+                                createLiteral(1)
+                            ),
+                            /*location*/ node)
+                        : node;
+                    for (const exportName of exportedNames) {
+                        // Mark the node to prevent triggering this rule again.
+                        noSubstitution[getNodeId(expression)] = true;
+                        expression = createExportExpression(exportName, expression);
+                    }
 
-        function createExportStatement(name: Identifier, value: Expression, location?: TextRange) {
-            const statement = createStatement(createExportAssignment(name, value));
-            statement.startsOnNewLine = true;
-            if (location) {
-                setSourceMapRange(statement, location);
+                    return expression;
+                }
             }
 
-            return statement;
-        }
-
-        function createExportAssignment(name: Identifier, value: Expression) {
-            return createAssignment(
-                name.originalKeywordKind === SyntaxKind.DefaultKeyword && languageVersion === ScriptTarget.ES3
-                    ? createElementAccess(
-                        createIdentifier("exports"),
-                        createLiteral(name.text)
-                    )
-                    : createPropertyAccess(
-                        createIdentifier("exports"),
-                        getSynthesizedClone(name)
-                    ),
-                value
-            );
-        }
-
-        interface AsynchronousDependencies {
-            aliasedModuleNames: Expression[];
-            unaliasedModuleNames: Expression[];
-            importAliasNames: ParameterDeclaration[];
+            return node;
         }
 
-        function collectAsynchronousDependencies(node: SourceFile, includeNonAmdDependencies: boolean): AsynchronousDependencies {
-            // names of modules with corresponding parameter in the factory function
-            const aliasedModuleNames: Expression[] = [];
-
-            // names of modules with no corresponding parameters in factory function
-            const unaliasedModuleNames: Expression[] = [];
-
-            // names of the parameters in the factory function; these
-            // parameters need to match the indexes of the corresponding
-            // module names in aliasedModuleNames.
-            const importAliasNames: ParameterDeclaration[] = [];
-
-            // Fill in amd-dependency tags
-            for (const amdDependency of node.amdDependencies) {
-                if (amdDependency.name) {
-                    aliasedModuleNames.push(createLiteral(amdDependency.path));
-                    importAliasNames.push(createParameter(amdDependency.name));
-                }
-                else {
-                    unaliasedModuleNames.push(createLiteral(amdDependency.path));
+        /**
+         * Gets the additional exports of a name.
+         *
+         * @param name The name.
+         */
+        function getExports(name: Identifier): Identifier[] | undefined {
+            if (!isGeneratedIdentifier(name)) {
+                const valueDeclaration = resolver.getReferencedImportDeclaration(name)
+                    || resolver.getReferencedValueDeclaration(name);
+                if (valueDeclaration) {
+                    return currentModuleInfo
+                        && currentModuleInfo.exportedBindings[getOriginalNodeId(valueDeclaration)];
                 }
             }
+        }
+    }
 
-            for (const importNode of externalImports) {
-                // Find the name of the external module
-                const externalModuleName = getExternalModuleNameLiteral(importNode, currentSourceFile, host, resolver, compilerOptions);
-
-                // Find the name of the module alias, if there is one
-                const importAliasName = getLocalNameForExternalImport(importNode, currentSourceFile);
-                if (includeNonAmdDependencies && importAliasName) {
-                    // Set emitFlags on the name of the classDeclaration
-                    // This is so that when printer will not substitute the identifier
-                    setEmitFlags(importAliasName, EmitFlags.NoSubstitution);
-                    aliasedModuleNames.push(externalModuleName);
-                    importAliasNames.push(createParameter(importAliasName));
-                }
-                else {
-                    unaliasedModuleNames.push(externalModuleName);
-                }
+    // emit output for the __export helper function
+    const exportStarHelper: EmitHelper = {
+        name: "typescript:export-star",
+        scoped: true,
+        text: `
+            function __export(m) {
+                for (var p in m) if (!exports.hasOwnProperty(p)) exports[p] = m[p];
             }
+        `
+    };
 
-            return { aliasedModuleNames, unaliasedModuleNames, importAliasNames };
-        }
-
-        function updateSourceFile(node: SourceFile, statements: Statement[]) {
-            const updated = getMutableClone(node);
-            updated.statements = createNodeArray(statements, node.statements);
-            return updated;
-        }
+    function createExportStarHelper(context: TransformationContext, module: Expression) {
+        const compilerOptions = context.getCompilerOptions();
+        return compilerOptions.importHelpers
+            ? createCall(getHelperName("__exportStar"), /*typeArguments*/ undefined, [module, createIdentifier("exports")])
+            : createCall(createIdentifier("__export"), /*typeArguments*/ undefined, [module]);
     }
+
+    // emit helper for dynamic import
+    const dynamicImportUMDHelper: EmitHelper = {
+        name: "typescript:dynamicimport-sync-require",
+        scoped: true,
+        text: `
+            var __syncRequire = typeof module === "object" && typeof module.exports === "object";`
+    };
 }
diff --git a/src/compiler/transformers/module/system.ts b/src/compiler/transformers/module/system.ts
index 4a137c8..fa126d1 100644
--- a/src/compiler/transformers/module/system.ts
+++ b/src/compiler/transformers/module/system.ts
@@ -1,5 +1,6 @@
 /// <reference path="../../factory.ts" />
 /// <reference path="../../visitor.ts" />
+/// <reference path="../destructuring.ts" />
 
 /*@internal*/
 namespace ts {
@@ -12,70 +13,51 @@ namespace ts {
         const {
             startLexicalEnvironment,
             endLexicalEnvironment,
-            hoistVariableDeclaration,
-            hoistFunctionDeclaration,
+            hoistVariableDeclaration
         } = context;
 
         const compilerOptions = context.getCompilerOptions();
         const resolver = context.getEmitResolver();
         const host = context.getEmitHost();
-        const languageVersion = getEmitScriptTarget(compilerOptions);
         const previousOnSubstituteNode = context.onSubstituteNode;
         const previousOnEmitNode = context.onEmitNode;
         context.onSubstituteNode = onSubstituteNode;
         context.onEmitNode = onEmitNode;
-        context.enableSubstitution(SyntaxKind.Identifier);
-        context.enableSubstitution(SyntaxKind.BinaryExpression);
-        context.enableSubstitution(SyntaxKind.PrefixUnaryExpression);
-        context.enableSubstitution(SyntaxKind.PostfixUnaryExpression);
-        context.enableEmitNotification(SyntaxKind.SourceFile);
-
-        const exportFunctionForFileMap: Identifier[] = [];
-        let currentSourceFile: SourceFile;
-        let externalImports: (ImportDeclaration | ImportEqualsDeclaration | ExportDeclaration)[];
-        let exportSpecifiers: Map<ExportSpecifier[]>;
-        let exportEquals: ExportAssignment;
-        let hasExportStarsToExportValues: boolean;
-        let exportFunctionForFile: Identifier;
-        let contextObjectForFile: Identifier;
-        let exportedLocalNames: Identifier[];
-        let exportedFunctionDeclarations: ExpressionStatement[];
-
+        context.enableSubstitution(SyntaxKind.Identifier); // Substitutes expression identifiers for imported symbols.
+        context.enableSubstitution(SyntaxKind.BinaryExpression); // Substitutes assignments to exported symbols.
+        context.enableSubstitution(SyntaxKind.PrefixUnaryExpression); // Substitutes updates to exported symbols.
+        context.enableSubstitution(SyntaxKind.PostfixUnaryExpression); // Substitutes updates to exported symbols.
+        context.enableEmitNotification(SyntaxKind.SourceFile); // Restore state when substituting nodes in a file.
+
+        const moduleInfoMap: ExternalModuleInfo[] = []; // The ExternalModuleInfo for each file.
+        const deferredExports: Statement[][] = []; // Exports to defer until an EndOfDeclarationMarker is found.
+        const exportFunctionsMap: Identifier[] = []; // The export function associated with a source file.
+        const noSubstitutionMap: boolean[][] = []; // Set of nodes for which substitution rules should be ignored for each file.
+
+        let currentSourceFile: SourceFile; // The current file.
+        let moduleInfo: ExternalModuleInfo; // ExternalModuleInfo for the current file.
+        let exportFunction: Identifier; // The export function for the current file.
+        let contextObject: Identifier; // The context object for the current file.
+        let hoistedStatements: Statement[];
         let enclosingBlockScopedContainer: Node;
-        let currentParent: Node;
-        let currentNode: Node;
+        let noSubstitution: boolean[]; // Set of nodes for which substitution rules should be ignored.
 
         return transformSourceFile;
 
+        /**
+         * Transforms the module aspects of a SourceFile.
+         *
+         * @param node The SourceFile node.
+         */
         function transformSourceFile(node: SourceFile) {
-            if (isDeclarationFile(node)) {
+            if (node.isDeclarationFile || !(isEffectiveExternalModule(node, compilerOptions) || node.transformFlags & TransformFlags.ContainsDynamicImport)) {
                 return node;
             }
 
-            if (isExternalModule(node) || compilerOptions.isolatedModules) {
-                currentSourceFile = node;
-                currentNode = node;
-
-                // Perform the transformation.
-                const updated = transformSystemModuleWorker(node);
-                aggregateTransformFlags(updated);
-
-                currentSourceFile = undefined;
-                externalImports = undefined;
-                exportSpecifiers = undefined;
-                exportEquals = undefined;
-                hasExportStarsToExportValues = false;
-                exportFunctionForFile = undefined;
-                contextObjectForFile = undefined;
-                exportedLocalNames = undefined;
-                exportedFunctionDeclarations = undefined;
-                return updated;
-            }
-
-            return node;
-        }
+            const id = getOriginalNodeId(node);
+            currentSourceFile = node;
+            enclosingBlockScopedContainer = node;
 
-        function transformSystemModuleWorker(node: SourceFile) {
             // System modules have the following shape:
             //
             //     System.register(['dep-1', ... 'dep-n'], function(exports) {/* module body function */})
@@ -88,66 +70,112 @@ namespace ts {
             //
             // The only exception in this rule is postfix unary operators,
             // see comment to 'substitutePostfixUnaryExpression' for more details
-            Debug.assert(!exportFunctionForFile);
 
             // Collect information about the external module and dependency groups.
-            ({ externalImports, exportSpecifiers, exportEquals, hasExportStarsToExportValues } = collectExternalModuleInfo(node, resolver));
+            moduleInfo = moduleInfoMap[id] = collectExternalModuleInfo(node, resolver, compilerOptions);
 
             // Make sure that the name of the 'exports' function does not conflict with
             // existing identifiers.
-            exportFunctionForFile = createUniqueName("exports");
-            contextObjectForFile = createUniqueName("context");
-
-            exportFunctionForFileMap[getOriginalNodeId(node)] = exportFunctionForFile;
-
-            const dependencyGroups = collectDependencyGroups(externalImports);
-
-            const statements: Statement[] = [];
+            exportFunction = createUniqueName("exports");
+            exportFunctionsMap[id] = exportFunction;
+            contextObject = createUniqueName("context");
 
             // Add the body of the module.
-            addSystemModuleBody(statements, node, dependencyGroups);
-
-            const moduleName = tryGetModuleNameFromFile(node, host, compilerOptions);
-            const dependencies = createArrayLiteral(map(dependencyGroups, getNameOfDependencyGroup));
-            const body = createFunctionExpression(
+            const dependencyGroups = collectDependencyGroups(moduleInfo.externalImports);
+            const moduleBodyBlock = createSystemModuleBody(node, dependencyGroups);
+            const moduleBodyFunction = createFunctionExpression(
+                /*modifiers*/ undefined,
                 /*asteriskToken*/ undefined,
                 /*name*/ undefined,
                 /*typeParameters*/ undefined,
                 [
-                    createParameter(exportFunctionForFile),
-                    createParameter(contextObjectForFile)
+                    createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, exportFunction),
+                    createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, contextObject)
                 ],
                 /*type*/ undefined,
-                setEmitFlags(
-                    createBlock(statements, /*location*/ undefined, /*multiLine*/ true),
-                    EmitFlags.EmitEmitHelpers
-                )
+                moduleBodyBlock
             );
 
             // Write the call to `System.register`
             // Clear the emit-helpers flag for later passes since we'll have already used it in the module body
             // So the helper will be emit at the correct position instead of at the top of the source-file
-            return updateSourceFile(node, [
-                createStatement(
-                    createCall(
-                        createPropertyAccess(createIdentifier("System"), "register"),
-                        /*typeArguments*/ undefined,
-                        moduleName
-                            ? [moduleName, dependencies, body]
-                            : [dependencies, body]
+            const moduleName = tryGetModuleNameFromFile(node, host, compilerOptions);
+            const dependencies = createArrayLiteral(map(dependencyGroups, dependencyGroup => dependencyGroup.name));
+            const updated = setEmitFlags(
+                updateSourceFileNode(
+                    node,
+                    setTextRange(
+                        createNodeArray([
+                            createStatement(
+                                createCall(
+                                    createPropertyAccess(createIdentifier("System"), "register"),
+                                /*typeArguments*/ undefined,
+                                    moduleName
+                                        ? [moduleName, dependencies, moduleBodyFunction]
+                                        : [dependencies, moduleBodyFunction]
+                                )
+                            )
+                        ]),
+                        node.statements
                     )
-                )
-            ], /*nodeEmitFlags*/ ~EmitFlags.EmitEmitHelpers & getEmitFlags(node));
+                ), EmitFlags.NoTrailingComments);
+
+            if (!(compilerOptions.outFile || compilerOptions.out)) {
+                moveEmitHelpers(updated, moduleBodyBlock, helper => !helper.scoped);
+            }
+
+            if (noSubstitution) {
+                noSubstitutionMap[id] = noSubstitution;
+                noSubstitution = undefined;
+            }
+
+            currentSourceFile = undefined;
+            moduleInfo = undefined;
+            exportFunction = undefined;
+            contextObject = undefined;
+            hoistedStatements = undefined;
+            enclosingBlockScopedContainer = undefined;
+            return aggregateTransformFlags(updated);
+        }
+
+        /**
+         * Collects the dependency groups for this files imports.
+         *
+         * @param externalImports The imports for the file.
+         */
+        function collectDependencyGroups(externalImports: (ImportDeclaration | ImportEqualsDeclaration | ExportDeclaration)[]) {
+            const groupIndices = createMap<number>();
+            const dependencyGroups: DependencyGroup[] = [];
+            for (let i = 0; i < externalImports.length; i++) {
+                const externalImport = externalImports[i];
+                const externalModuleName = getExternalModuleNameLiteral(externalImport, currentSourceFile, host, resolver, compilerOptions);
+                if (externalModuleName) {
+                    const text = externalModuleName.text;
+                    const groupIndex = groupIndices.get(text);
+                    if (groupIndex !== undefined) {
+                        // deduplicate/group entries in dependency list by the dependency name
+                        dependencyGroups[groupIndex].externalImports.push(externalImport);
+                    }
+                    else {
+                        groupIndices.set(text, dependencyGroups.length);
+                        dependencyGroups.push({
+                            name: externalModuleName,
+                            externalImports: [externalImport]
+                        });
+                    }
+                }
+            }
+
+            return dependencyGroups;
         }
 
         /**
          * Adds the statements for the module body function for the source file.
          *
-         * @param statements The output statements for the module body.
          * @param node The source file for the module.
-         * @param statementOffset The offset at which to begin visiting the statements of the SourceFile.
+         * @param dependencyGroups The grouped dependencies of the module.
          */
-        function addSystemModuleBody(statements: Statement[], node: SourceFile, dependencyGroups: DependencyGroup[]) {
+        function createSystemModuleBody(node: SourceFile, dependencyGroups: DependencyGroup[]) {
             // Shape of the body in system modules:
             //
             //  function (exports) {
@@ -175,10 +203,9 @@ namespace ts {
             // Will be transformed to:
             //
             //  function(exports) {
-            //      var file_1; // local alias
-            //      var y;
             //      function foo() { return y + file_1.x(); }
             //      exports("foo", foo);
+            //      var file_1, y;
             //      return {
             //          setters: [
             //              function(v) { file_1 = v }
@@ -190,13 +217,16 @@ namespace ts {
             //      };
             //  }
 
+            const statements: Statement[] = [];
+
             // We start a new lexical environment in this function body, but *not* in the
             // body of the execute function. This allows us to emit temporary declarations
             // only in the outer module body and not in the inner one.
             startLexicalEnvironment();
 
             // Add any prologue directives.
-            const statementOffset = addPrologueDirectives(statements, node.statements, /*ensureUseStrict*/ !compilerOptions.noImplicitUseStrict, visitSourceElement);
+            const ensureUseStrict = compilerOptions.alwaysStrict || (!compilerOptions.noImplicitUseStrict && isExternalModule(currentSourceFile));
+            const statementOffset = addPrologue(statements, node.statements, ensureUseStrict, sourceElementVisitor);
 
             // var __moduleName = context_1 && context_1.id;
             statements.push(
@@ -207,78 +237,77 @@ namespace ts {
                             "__moduleName",
                             /*type*/ undefined,
                             createLogicalAnd(
-                                contextObjectForFile,
-                                createPropertyAccess(contextObjectForFile, "id")
+                                contextObject,
+                                createPropertyAccess(contextObject, "id")
                             )
                         )
                     ])
                 )
             );
 
+            // Visit the synthetic external helpers import declaration if present
+            visitNode(moduleInfo.externalHelpersImportDeclaration, sourceElementVisitor, isStatement);
+
             // Visit the statements of the source file, emitting any transformations into
             // the `executeStatements` array. We do this *before* we fill the `setters` array
             // as we both emit transformations as well as aggregate some data used when creating
             // setters. This allows us to reduce the number of times we need to loop through the
             // statements of the source file.
-            const executeStatements = visitNodes(node.statements, visitSourceElement, isStatement, statementOffset);
+            const executeStatements = visitNodes(node.statements, sourceElementVisitor, isStatement, statementOffset);
+
+            // Emit early exports for function declarations.
+            addRange(statements, hoistedStatements);
 
-            // We emit the lexical environment (hoisted variables and function declarations)
-            // early to align roughly with our previous emit output.
+            // We emit hoisted variables early to align roughly with our previous emit output.
             // Two key differences in this approach are:
             // - Temporary variables will appear at the top rather than at the bottom of the file
-            // - Calls to the exporter for exported function declarations are grouped after
-            //   the declarations.
             addRange(statements, endLexicalEnvironment());
 
-            // Emit early exports for function declarations.
-            addRange(statements, exportedFunctionDeclarations);
-
             const exportStarFunction = addExportStarIfNeeded(statements);
-
-            statements.push(
-                createReturn(
-                    setMultiLine(
-                        createObjectLiteral([
-                            createPropertyAssignment("setters",
-                                generateSetters(exportStarFunction, dependencyGroups)
-                            ),
-                            createPropertyAssignment("execute",
-                                createFunctionExpression(
-                                    /*asteriskToken*/ undefined,
-                                    /*name*/ undefined,
-                                    /*typeParameters*/ undefined,
-                                    /*parameters*/ [],
-                                    /*type*/ undefined,
-                                    createBlock(
-                                        executeStatements,
-                                        /*location*/ undefined,
-                                        /*multiLine*/ true
-                                    )
-                                )
-                            )
-                        ]),
-                        /*multiLine*/ true
+            const moduleObject = createObjectLiteral([
+                createPropertyAssignment("setters",
+                    createSettersArray(exportStarFunction, dependencyGroups)
+                ),
+                createPropertyAssignment("execute",
+                    createFunctionExpression(
+                        /*modifiers*/ undefined,
+                        /*asteriskToken*/ undefined,
+                        /*name*/ undefined,
+                        /*typeParameters*/ undefined,
+                        /*parameters*/ [],
+                        /*type*/ undefined,
+                        createBlock(executeStatements, /*multiLine*/ true)
                     )
                 )
-            );
+            ]);
+
+            moduleObject.multiLine = true;
+            statements.push(createReturn(moduleObject));
+            return createBlock(statements, /*multiLine*/ true);
         }
 
+        /**
+         * Adds an exportStar function to a statement list if it is needed for the file.
+         *
+         * @param statements A statement list.
+         */
         function addExportStarIfNeeded(statements: Statement[]) {
-            if (!hasExportStarsToExportValues) {
+            if (!moduleInfo.hasExportStarsToExportValues) {
                 return;
             }
+
             // when resolving exports local exported entries/indirect exported entries in the module
             // should always win over entries with similar names that were added via star exports
             // to support this we store names of local/indirect exported entries in a set.
             // this set is used to filter names brought by star expors.
 
             // local names set should only be added if we have anything exported
-            if (!exportedLocalNames && isEmpty(exportSpecifiers)) {
+            if (!moduleInfo.exportedNames && moduleInfo.exportSpecifiers.size === 0) {
                 // no exported declarations (export var ...) or export specifiers (export {x})
                 // check if we have any non star export declarations.
                 let hasExportDeclarationWithExportClause = false;
-                for (const externalImport of externalImports) {
-                    if (externalImport.kind === SyntaxKind.ExportDeclaration && (<ExportDeclaration>externalImport).exportClause) {
+                for (const externalImport of moduleInfo.externalImports) {
+                    if (externalImport.kind === SyntaxKind.ExportDeclaration && externalImport.exportClause) {
                         hasExportDeclarationWithExportClause = true;
                         break;
                     }
@@ -286,24 +315,30 @@ namespace ts {
 
                 if (!hasExportDeclarationWithExportClause) {
                     // we still need to emit exportStar helper
-                    return addExportStarFunction(statements, /*localNames*/ undefined);
+                    const exportStarFunction = createExportStarFunction(/*localNames*/ undefined);
+                    statements.push(exportStarFunction);
+                    return exportStarFunction.name;
                 }
             }
 
             const exportedNames: ObjectLiteralElementLike[] = [];
-            if (exportedLocalNames) {
-                for (const exportedLocalName of exportedLocalNames) {
+            if (moduleInfo.exportedNames) {
+                for (const exportedLocalName of moduleInfo.exportedNames) {
+                    if (exportedLocalName.text === "default") {
+                        continue;
+                    }
+
                     // write name of exported declaration, i.e 'export var x...'
                     exportedNames.push(
                         createPropertyAssignment(
-                            createLiteral(exportedLocalName.text),
-                            createLiteral(true)
+                            createLiteral(exportedLocalName),
+                            createTrue()
                         )
                     );
                 }
             }
 
-            for (const externalImport of externalImports) {
+            for (const externalImport of moduleInfo.externalImports) {
                 if (externalImport.kind !== SyntaxKind.ExportDeclaration) {
                     continue;
                 }
@@ -319,7 +354,7 @@ namespace ts {
                     exportedNames.push(
                         createPropertyAssignment(
                             createLiteral((element.name || element.propertyName).text),
-                            createLiteral(true)
+                            createTrue()
                         )
                     );
                 }
@@ -333,20 +368,100 @@ namespace ts {
                         createVariableDeclaration(
                             exportedNamesStorageRef,
                             /*type*/ undefined,
-                            createObjectLiteral(exportedNames, /*location*/ undefined, /*multiline*/ true)
+                            createObjectLiteral(exportedNames, /*multiline*/ true)
                         )
                     ])
                 )
             );
 
-            return addExportStarFunction(statements, exportedNamesStorageRef);
+            const exportStarFunction = createExportStarFunction(exportedNamesStorageRef);
+            statements.push(exportStarFunction);
+            return exportStarFunction.name;
+        }
+
+        /**
+         * Creates an exportStar function for the file, with an optional set of excluded local
+         * names.
+         *
+         * @param localNames An optional reference to an object containing a set of excluded local
+         * names.
+         */
+        function createExportStarFunction(localNames: Identifier | undefined) {
+            const exportStarFunction = createUniqueName("exportStar");
+            const m = createIdentifier("m");
+            const n = createIdentifier("n");
+            const exports = createIdentifier("exports");
+            let condition: Expression = createStrictInequality(n, createLiteral("default"));
+            if (localNames) {
+                condition = createLogicalAnd(
+                    condition,
+                    createLogicalNot(
+                        createCall(
+                            createPropertyAccess(localNames, "hasOwnProperty"),
+                            /*typeArguments*/ undefined,
+                            [n]
+                        )
+                    )
+                );
+            }
+
+            return createFunctionDeclaration(
+                /*decorators*/ undefined,
+                /*modifiers*/ undefined,
+                /*asteriskToken*/ undefined,
+                exportStarFunction,
+                /*typeParameters*/ undefined,
+                [createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, m)],
+                /*type*/ undefined,
+                createBlock([
+                    createVariableStatement(
+                        /*modifiers*/ undefined,
+                        createVariableDeclarationList([
+                            createVariableDeclaration(
+                                exports,
+                                /*type*/ undefined,
+                                createObjectLiteral([])
+                            )
+                        ])
+                    ),
+                    createForIn(
+                        createVariableDeclarationList([
+                            createVariableDeclaration(n, /*type*/ undefined)
+                        ]),
+                        m,
+                        createBlock([
+                            setEmitFlags(
+                                createIf(
+                                    condition,
+                                    createStatement(
+                                        createAssignment(
+                                            createElementAccess(exports, n),
+                                            createElementAccess(m, n)
+                                        )
+                                    )
+                                ),
+                                EmitFlags.SingleLine
+                            )
+                        ])
+                    ),
+                    createStatement(
+                        createCall(
+                            exportFunction,
+                            /*typeArguments*/ undefined,
+                            [exports]
+                        )
+                    )
+                ], /*multiline*/ true)
+            );
         }
 
         /**
-         * Emits a setter callback for each dependency group.
-         * @param write The callback used to write each callback.
+         * Creates an array setter callbacks for each dependency group.
+         *
+         * @param exportStarFunction A reference to an exportStarFunction for the file.
+         * @param dependencyGroups An array of grouped dependencies.
          */
-        function generateSetters(exportStarFunction: Identifier, dependencyGroups: DependencyGroup[]) {
+        function createSettersArray(exportStarFunction: Identifier, dependencyGroups: DependencyGroup[]) {
             const setters: Expression[] = [];
             for (const group of dependencyGroups) {
                 // derive a unique name for parameter from the first named entry in the group
@@ -362,8 +477,8 @@ namespace ts {
                                 // module is imported only for side-effects, no emit required
                                 break;
                             }
+                            // falls through
 
-                        // fall-through
                         case SyntaxKind.ImportEqualsDeclaration:
                             Debug.assert(importVariableName !== undefined);
                             // save import into the local
@@ -401,9 +516,9 @@ namespace ts {
                                 statements.push(
                                     createStatement(
                                         createCall(
-                                            exportFunctionForFile,
+                                            exportFunction,
                                             /*typeArguments*/ undefined,
-                                            [createObjectLiteral(properties, /*location*/ undefined, /*multiline*/ true)]
+                                            [createObjectLiteral(properties, /*multiline*/ true)]
                                         )
                                     )
                                 );
@@ -430,20 +545,30 @@ namespace ts {
 
                 setters.push(
                     createFunctionExpression(
+                        /*modifiers*/ undefined,
                         /*asteriskToken*/ undefined,
                         /*name*/ undefined,
                         /*typeParameters*/ undefined,
-                        [createParameter(parameterName)],
+                        [createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, parameterName)],
                         /*type*/ undefined,
-                        createBlock(statements, /*location*/ undefined, /*multiLine*/ true)
+                        createBlock(statements, /*multiLine*/ true)
                     )
                 );
             }
 
-            return createArrayLiteral(setters, /*location*/ undefined, /*multiLine*/ true);
+            return createArrayLiteral(setters, /*multiLine*/ true);
         }
 
-        function visitSourceElement(node: Node): VisitResult<Node> {
+        //
+        // Top-level Source Element Visitors
+        //
+
+        /**
+         * Visit source elements at the top-level of a module.
+         *
+         * @param node The node to visit.
+         */
+        function sourceElementVisitor(node: Node): VisitResult<Node> {
             switch (node.kind) {
                 case SyntaxKind.ImportDeclaration:
                     return visitImportDeclaration(<ImportDeclaration>node);
@@ -452,954 +577,1247 @@ namespace ts {
                     return visitImportEqualsDeclaration(<ImportEqualsDeclaration>node);
 
                 case SyntaxKind.ExportDeclaration:
-                    return visitExportDeclaration(<ExportDeclaration>node);
+                    // ExportDeclarations are elided as they are handled via
+                    // `appendExportsOfDeclaration`.
+                    return undefined;
 
                 case SyntaxKind.ExportAssignment:
                     return visitExportAssignment(<ExportAssignment>node);
 
                 default:
-                    return visitNestedNode(node);
-            }
-        }
-
-        function visitNestedNode(node: Node): VisitResult<Node> {
-            const savedEnclosingBlockScopedContainer = enclosingBlockScopedContainer;
-            const savedCurrentParent = currentParent;
-            const savedCurrentNode = currentNode;
-
-            const currentGrandparent = currentParent;
-            currentParent = currentNode;
-            currentNode = node;
-
-            if (currentParent && isBlockScope(currentParent, currentGrandparent)) {
-                enclosingBlockScopedContainer = currentParent;
-            }
-
-            const result = visitNestedNodeWorker(node);
-
-            enclosingBlockScopedContainer = savedEnclosingBlockScopedContainer;
-            currentParent = savedCurrentParent;
-            currentNode = savedCurrentNode;
-
-            return result;
-        }
-
-        function visitNestedNodeWorker(node: Node): VisitResult<Node> {
-            switch (node.kind) {
-                case SyntaxKind.VariableStatement:
-                    return visitVariableStatement(<VariableStatement>node);
-
-                case SyntaxKind.FunctionDeclaration:
-                    return visitFunctionDeclaration(<FunctionDeclaration>node);
-
-                case SyntaxKind.ClassDeclaration:
-                    return visitClassDeclaration(<ClassDeclaration>node);
-
-                case SyntaxKind.ForStatement:
-                    return visitForStatement(<ForStatement>node);
-
-                case SyntaxKind.ForInStatement:
-                    return visitForInStatement(<ForInStatement>node);
-
-                case SyntaxKind.ForOfStatement:
-                    return visitForOfStatement(<ForOfStatement>node);
-
-                case SyntaxKind.DoStatement:
-                    return visitDoStatement(<DoStatement>node);
-
-                case SyntaxKind.WhileStatement:
-                    return visitWhileStatement(<WhileStatement>node);
-
-                case SyntaxKind.LabeledStatement:
-                    return visitLabeledStatement(<LabeledStatement>node);
-
-                case SyntaxKind.WithStatement:
-                    return visitWithStatement(<WithStatement>node);
-
-                case SyntaxKind.SwitchStatement:
-                    return visitSwitchStatement(<SwitchStatement>node);
-
-                case SyntaxKind.CaseBlock:
-                    return visitCaseBlock(<CaseBlock>node);
-
-                case SyntaxKind.CaseClause:
-                    return visitCaseClause(<CaseClause>node);
-
-                case SyntaxKind.DefaultClause:
-                    return visitDefaultClause(<DefaultClause>node);
-
-                case SyntaxKind.TryStatement:
-                    return visitTryStatement(<TryStatement>node);
-
-                case SyntaxKind.CatchClause:
-                    return visitCatchClause(<CatchClause>node);
-
-                case SyntaxKind.Block:
-                    return visitBlock(<Block>node);
-
-                case SyntaxKind.ExpressionStatement:
-                    return visitExpressionStatement(<ExpressionStatement>node);
-
-                default:
-                    return node;
-            }
-        }
-
-        function visitImportDeclaration(node: ImportDeclaration): Node {
-            if (node.importClause && contains(externalImports, node)) {
-                hoistVariableDeclaration(getLocalNameForExternalImport(node, currentSourceFile));
+                    return nestedElementVisitor(node);
             }
-
-            return undefined;
         }
 
-        function visitImportEqualsDeclaration(node: ImportEqualsDeclaration): Node {
-            if (contains(externalImports, node)) {
+        /**
+         * Visits an ImportDeclaration node.
+         *
+         * @param node The node to visit.
+         */
+        function visitImportDeclaration(node: ImportDeclaration): VisitResult<Statement> {
+            let statements: Statement[];
+            if (node.importClause) {
                 hoistVariableDeclaration(getLocalNameForExternalImport(node, currentSourceFile));
             }
 
-            // NOTE(rbuckton): Do we support export import = require('') in System?
-            return undefined;
-        }
-
-        function visitExportDeclaration(node: ExportDeclaration): VisitResult<Statement> {
-            if (!node.moduleSpecifier) {
-                const statements: Statement[] = [];
-                addRange(statements, map(node.exportClause.elements, visitExportSpecifier));
-                return statements;
-            }
-
-            return undefined;
-        }
-
-        function visitExportSpecifier(specifier: ExportSpecifier): Statement {
-            if (resolver.getReferencedValueDeclaration(specifier.propertyName || specifier.name)
-                || resolver.isValueAliasDeclaration(specifier)) {
-                recordExportName(specifier.name);
-                return createExportStatement(
-                    specifier.name,
-                    specifier.propertyName || specifier.name
-                );
+            if (hasAssociatedEndOfDeclarationMarker(node)) {
+                // Defer exports until we encounter an EndOfDeclarationMarker node
+                const id = getOriginalNodeId(node);
+                deferredExports[id] = appendExportsOfImportDeclaration(deferredExports[id], node);
             }
-            return undefined;
-        }
-
-        function visitExportAssignment(node: ExportAssignment): Statement {
-            if (!node.isExportEquals) {
-                if (nodeIsSynthesized(node) || resolver.isValueAliasDeclaration(node)) {
-                    return createExportStatement(
-                        createLiteral("default"),
-                        node.expression
-                    );
-                }
+            else {
+                statements = appendExportsOfImportDeclaration(statements, node);
             }
 
-            return undefined;
+            return singleOrMany(statements);
         }
 
         /**
-         * Visits a variable statement, hoisting declared names to the top-level module body.
-         * Each declaration is rewritten into an assignment expression.
+         * Visits an ImportEqualsDeclaration node.
          *
-         * @param node The variable statement to visit.
+         * @param node The node to visit.
          */
-        function visitVariableStatement(node: VariableStatement): VisitResult<Statement> {
-            // hoist only non-block scoped declarations or block scoped declarations parented by source file
-            const shouldHoist =
-                ((getCombinedNodeFlags(getOriginalNode(node.declarationList)) & NodeFlags.BlockScoped) == 0) ||
-                enclosingBlockScopedContainer.kind === SyntaxKind.SourceFile;
-            if (!shouldHoist) {
-                return node;
-            }
-            const isExported = hasModifier(node, ModifierFlags.Export);
-            const expressions: Expression[] = [];
-            for (const variable of node.declarationList.declarations) {
-                const visited = <Expression>transformVariable(variable, isExported);
-                if (visited) {
-                    expressions.push(visited);
-                }
-            }
+        function visitImportEqualsDeclaration(node: ImportEqualsDeclaration): VisitResult<Statement> {
+            Debug.assert(isExternalModuleImportEqualsDeclaration(node), "import= for internal module references should be handled in an earlier transformer.");
+
+            let statements: Statement[];
+            hoistVariableDeclaration(getLocalNameForExternalImport(node, currentSourceFile));
 
-            if (expressions.length) {
-                return createStatement(inlineExpressions(expressions), node);
+            if (hasAssociatedEndOfDeclarationMarker(node)) {
+                // Defer exports until we encounter an EndOfDeclarationMarker node
+                const id = getOriginalNodeId(node);
+                deferredExports[id] = appendExportsOfImportEqualsDeclaration(deferredExports[id], node);
+            }
+            else {
+                statements = appendExportsOfImportEqualsDeclaration(statements, node);
             }
 
-            return undefined;
+            return singleOrMany(statements);
         }
 
         /**
-         * Transforms a VariableDeclaration into one or more assignment expressions.
+         * Visits an ExportAssignment node.
          *
-         * @param node The VariableDeclaration to transform.
-         * @param isExported A value used to indicate whether the containing statement was exported.
+         * @param node The node to visit.
          */
-        function transformVariable(node: VariableDeclaration, isExported: boolean): VariableDeclaration | Expression {
-            // Hoist any bound names within the declaration.
-            hoistBindingElement(node, isExported);
-
-            if (!node.initializer) {
-                // If the variable has no initializer, ignore it.
-                return;
+        function visitExportAssignment(node: ExportAssignment): VisitResult<Statement> {
+            if (node.isExportEquals) {
+                // Elide `export=` as it is illegal in a SystemJS module.
+                return undefined;
             }
 
-            const name = node.name;
-            if (isIdentifier(name)) {
-                // If the variable has an IdentifierName, write out an assignment expression in its place.
-                return createAssignment(name, node.initializer);
+            const expression = visitNode(node.expression, destructuringAndImportCallVisitor, isExpression);
+            const original = node.original;
+            if (original && hasAssociatedEndOfDeclarationMarker(original)) {
+                // Defer exports until we encounter an EndOfDeclarationMarker node
+                const id = getOriginalNodeId(node);
+                deferredExports[id] = appendExportStatement(deferredExports[id], createIdentifier("default"), expression, /*allowComments*/ true);
             }
             else {
-                // If the variable has a BindingPattern, flatten the variable into multiple assignment expressions.
-                return flattenVariableDestructuringToExpression(context, node, hoistVariableDeclaration);
+                return createExportStatement(createIdentifier("default"), expression, /*allowComments*/ true);
             }
         }
 
         /**
          * Visits a FunctionDeclaration, hoisting it to the outer module body function.
          *
-         * @param node The function declaration to visit.
+         * @param node The node to visit.
          */
-        function visitFunctionDeclaration(node: FunctionDeclaration): Node {
+        function visitFunctionDeclaration(node: FunctionDeclaration): VisitResult<Statement> {
             if (hasModifier(node, ModifierFlags.Export)) {
-                // If the function is exported, ensure it has a name and rewrite the function without any export flags.
-                const name = node.name || getGeneratedNameForNode(node);
-                const newNode = createFunctionDeclaration(
-                    /*decorators*/ undefined,
-                    /*modifiers*/ undefined,
-                    node.asteriskToken,
-                    name,
-                    /*typeParameters*/ undefined,
-                    node.parameters,
-                    /*type*/ undefined,
-                    node.body,
-                    /*location*/ node);
-
-                // Record a declaration export in the outer module body function.
-                recordExportedFunctionDeclaration(node);
-
-                if (!hasModifier(node, ModifierFlags.Default)) {
-                    recordExportName(name);
-                }
+                hoistedStatements = append(hoistedStatements,
+                    updateFunctionDeclaration(
+                        node,
+                        node.decorators,
+                        visitNodes(node.modifiers, modifierVisitor, isModifier),
+                        node.asteriskToken,
+                        getDeclarationName(node, /*allowComments*/ true, /*allowSourceMaps*/ true),
+                        /*typeParameters*/ undefined,
+                        visitNodes(node.parameters, destructuringAndImportCallVisitor, isParameterDeclaration),
+                        /*type*/ undefined,
+                        visitNode(node.body, destructuringAndImportCallVisitor, isBlock)));
+            }
+            else {
+                hoistedStatements = append(hoistedStatements, visitEachChild(node, destructuringAndImportCallVisitor, context));
+            }
 
-                setOriginalNode(newNode, node);
-                node = newNode;
+            if (hasAssociatedEndOfDeclarationMarker(node)) {
+                // Defer exports until we encounter an EndOfDeclarationMarker node
+                const id = getOriginalNodeId(node);
+                deferredExports[id] = appendExportsOfHoistedDeclaration(deferredExports[id], node);
+            }
+            else {
+                hoistedStatements = appendExportsOfHoistedDeclaration(hoistedStatements, node);
             }
 
-            // Hoist the function declaration to the outer module body function.
-            hoistFunctionDeclaration(node);
             return undefined;
         }
 
-        function visitExpressionStatement(node: ExpressionStatement): VisitResult<Statement> {
-            const originalNode = getOriginalNode(node);
-            if ((originalNode.kind === SyntaxKind.ModuleDeclaration || originalNode.kind === SyntaxKind.EnumDeclaration) && hasModifier(originalNode, ModifierFlags.Export)) {
-                const name = getDeclarationName(<ModuleDeclaration | EnumDeclaration>originalNode);
-                // We only need to hoistVariableDeclaration for EnumDeclaration
-                // as ModuleDeclaration is already hoisted when the transformer call visitVariableStatement
-                // which then call transformsVariable for each declaration in declarationList
-                if (originalNode.kind === SyntaxKind.EnumDeclaration) {
-                    hoistVariableDeclaration(name);
-                }
-                return [
-                    node,
-                    createExportStatement(name, name)
-                ];
-            }
-            return node;
-        }
-
         /**
          * Visits a ClassDeclaration, hoisting its name to the outer module body function.
          *
-         * @param node The class declaration to visit.
+         * @param node The node to visit.
          */
         function visitClassDeclaration(node: ClassDeclaration): VisitResult<Statement> {
+            let statements: Statement[];
+
             // Hoist the name of the class declaration to the outer module body function.
-            const name = getDeclarationName(node);
+            const name = getLocalName(node);
             hoistVariableDeclaration(name);
 
-            const statements: Statement[] = [];
-
             // Rewrite the class declaration into an assignment of a class expression.
-            statements.push(
-                createStatement(
-                    createAssignment(
-                        name,
-                        createClassExpression(
-                            /*modifiers*/ undefined,
-                            node.name,
-                            /*typeParameters*/ undefined,
-                            node.heritageClauses,
-                            node.members,
-                            /*location*/ node
+            statements = append(statements,
+                setTextRange(
+                    createStatement(
+                        createAssignment(
+                            name,
+                            setTextRange(
+                                createClassExpression(
+                                    /*modifiers*/ undefined,
+                                    node.name,
+                                    /*typeParameters*/ undefined,
+                                    visitNodes(node.heritageClauses, destructuringAndImportCallVisitor, isHeritageClause),
+                                    visitNodes(node.members, destructuringAndImportCallVisitor, isClassElement)
+                                ),
+                                node
+                            )
                         )
                     ),
-                    /*location*/ node
+                    node
                 )
             );
 
-            // If the class was exported, write a declaration export to the inner module body function.
-            if (hasModifier(node, ModifierFlags.Export)) {
-                if (!hasModifier(node, ModifierFlags.Default)) {
-                    recordExportName(name);
-                }
-
-                statements.push(createDeclarationExport(node));
+            if (hasAssociatedEndOfDeclarationMarker(node)) {
+                // Defer exports until we encounter an EndOfDeclarationMarker node
+                const id = getOriginalNodeId(node);
+                deferredExports[id] = appendExportsOfHoistedDeclaration(deferredExports[id], node);
+            }
+            else {
+                statements = appendExportsOfHoistedDeclaration(statements, node);
             }
 
-            return statements;
-        }
-
-        function shouldHoistLoopInitializer(node: VariableDeclarationList | Expression) {
-            return isVariableDeclarationList(node) && (getCombinedNodeFlags(node) & NodeFlags.BlockScoped) === 0;
+            return singleOrMany(statements);
         }
 
         /**
-         * Visits the body of a ForStatement to hoist declarations.
+         * Visits a variable statement, hoisting declared names to the top-level module body.
+         * Each declaration is rewritten into an assignment expression.
          *
-         * @param node The statement to visit.
+         * @param node The node to visit.
          */
-        function visitForStatement(node: ForStatement): ForStatement {
-            const initializer = node.initializer;
-            if (shouldHoistLoopInitializer(initializer)) {
-                const expressions: Expression[] = [];
-                for (const variable of (<VariableDeclarationList>initializer).declarations) {
-                    const visited = <Expression>transformVariable(variable, /*isExported*/ false);
-                    if (visited) {
-                        expressions.push(visited);
-                    }
-                };
-
-                return createFor(
-                    expressions.length
-                        ? inlineExpressions(expressions)
-                        : <OmittedExpression>createSynthesizedNode(SyntaxKind.OmittedExpression),
-                    node.condition,
-                    node.incrementor,
-                    visitNode(node.statement, visitNestedNode, isStatement),
-                    /*location*/ node
-                );
+        function visitVariableStatement(node: VariableStatement): VisitResult<Statement> {
+            if (!shouldHoistVariableDeclarationList(node.declarationList)) {
+                return visitNode(node, destructuringAndImportCallVisitor, isStatement);
             }
-            else {
-                return visitEachChild(node, visitNestedNode, context);
+
+            let expressions: Expression[];
+            const isExportedDeclaration = hasModifier(node, ModifierFlags.Export);
+            const isMarkedDeclaration = hasAssociatedEndOfDeclarationMarker(node);
+            for (const variable of node.declarationList.declarations) {
+                if (variable.initializer) {
+                    expressions = append(expressions, transformInitializedVariable(variable, isExportedDeclaration && !isMarkedDeclaration));
+                }
+                else {
+                    hoistBindingElement(variable);
+                }
             }
-        }
 
-        /**
-         * Transforms and hoists the declaration list of a ForInStatement or ForOfStatement into an expression.
-         *
-         * @param node The decalaration list to transform.
-         */
-        function transformForBinding(node: VariableDeclarationList): Expression {
-            const firstDeclaration = firstOrUndefined(node.declarations);
-            hoistBindingElement(firstDeclaration, /*isExported*/ false);
-
-            const name = firstDeclaration.name;
-            return isIdentifier(name)
-                ? name
-                : flattenVariableDestructuringToExpression(context, firstDeclaration, hoistVariableDeclaration);
-        }
+            let statements: Statement[];
+            if (expressions) {
+                statements = append(statements, setTextRange(createStatement(inlineExpressions(expressions)), node));
+            }
 
-        /**
-         * Visits the body of a ForInStatement to hoist declarations.
-         *
-         * @param node The statement to visit.
-         */
-        function visitForInStatement(node: ForInStatement): ForInStatement {
-            const initializer = node.initializer;
-            if (shouldHoistLoopInitializer(initializer)) {
-                const updated = getMutableClone(node);
-                updated.initializer = transformForBinding(<VariableDeclarationList>initializer);
-                updated.statement = visitNode(node.statement, visitNestedNode, isStatement, /*optional*/ false, liftToBlock);
-                return updated;
+            if (isMarkedDeclaration) {
+                // Defer exports until we encounter an EndOfDeclarationMarker node
+                const id = getOriginalNodeId(node);
+                deferredExports[id] = appendExportsOfVariableStatement(deferredExports[id], node, isExportedDeclaration);
             }
             else {
-                return visitEachChild(node, visitNestedNode, context);
+                statements = appendExportsOfVariableStatement(statements, node, /*exportSelf*/ false);
             }
+
+            return singleOrMany(statements);
         }
 
         /**
-         * Visits the body of a ForOfStatement to hoist declarations.
+         * Hoists the declared names of a VariableDeclaration or BindingElement.
          *
-         * @param node The statement to visit.
+         * @param node The declaration to hoist.
          */
-        function visitForOfStatement(node: ForOfStatement): ForOfStatement {
-            const initializer = node.initializer;
-            if (shouldHoistLoopInitializer(initializer)) {
-                const updated = getMutableClone(node);
-                updated.initializer = transformForBinding(<VariableDeclarationList>initializer);
-                updated.statement = visitNode(node.statement, visitNestedNode, isStatement, /*optional*/ false, liftToBlock);
-                return updated;
+        function hoistBindingElement(node: VariableDeclaration | BindingElement): void {
+            if (isBindingPattern(node.name)) {
+                for (const element of node.name.elements) {
+                    if (!isOmittedExpression(element)) {
+                        hoistBindingElement(element);
+                    }
+                }
             }
             else {
-                return visitEachChild(node, visitNestedNode, context);
+                hoistVariableDeclaration(getSynthesizedClone(node.name));
             }
         }
 
         /**
-         * Visits the body of a DoStatement to hoist declarations.
+         * Determines whether a VariableDeclarationList should be hoisted.
          *
-         * @param node The statement to visit.
+         * @param node The node to test.
          */
-        function visitDoStatement(node: DoStatement) {
-            const statement = visitNode(node.statement, visitNestedNode, isStatement, /*optional*/ false, liftToBlock);
-            if (statement !== node.statement) {
-                const updated = getMutableClone(node);
-                updated.statement = statement;
-                return updated;
-            }
-            return node;
+        function shouldHoistVariableDeclarationList(node: VariableDeclarationList) {
+            // hoist only non-block scoped declarations or block scoped declarations parented by source file
+            return (getEmitFlags(node) & EmitFlags.NoHoisting) === 0
+                && (enclosingBlockScopedContainer.kind === SyntaxKind.SourceFile
+                    || (getOriginalNode(node).flags & NodeFlags.BlockScoped) === 0);
         }
 
         /**
-         * Visits the body of a WhileStatement to hoist declarations.
+         * Transform an initialized variable declaration into an expression.
          *
-         * @param node The statement to visit.
+         * @param node The node to transform.
+         * @param isExportedDeclaration A value indicating whether the variable is exported.
          */
-        function visitWhileStatement(node: WhileStatement) {
-            const statement = visitNode(node.statement, visitNestedNode, isStatement, /*optional*/ false, liftToBlock);
-            if (statement !== node.statement) {
-                const updated = getMutableClone(node);
-                updated.statement = statement;
-                return updated;
-            }
-            return node;
+        function transformInitializedVariable(node: VariableDeclaration, isExportedDeclaration: boolean): Expression {
+            const createAssignment = isExportedDeclaration ? createExportedVariableAssignment : createNonExportedVariableAssignment;
+            return isBindingPattern(node.name)
+                ? flattenDestructuringAssignment(
+                    node,
+                    destructuringAndImportCallVisitor,
+                    context,
+                    FlattenLevel.All,
+                    /*needsValue*/ false,
+                    createAssignment
+                )
+                : createAssignment(node.name, visitNode(node.initializer, destructuringAndImportCallVisitor, isExpression));
         }
 
         /**
-         * Visits the body of a LabeledStatement to hoist declarations.
+         * Creates an assignment expression for an exported variable declaration.
          *
-         * @param node The statement to visit.
+         * @param name The name of the variable.
+         * @param value The value of the variable's initializer.
+         * @param location The source map location for the assignment.
          */
-        function visitLabeledStatement(node: LabeledStatement) {
-            const statement = visitNode(node.statement, visitNestedNode, isStatement, /*optional*/ false, liftToBlock);
-            if (statement !== node.statement) {
-                const updated = getMutableClone(node);
-                updated.statement = statement;
-                return updated;
-            }
-            return node;
+        function createExportedVariableAssignment(name: Identifier, value: Expression, location?: TextRange) {
+            return createVariableAssignment(name, value, location, /*isExportedDeclaration*/ true);
         }
 
         /**
-         * Visits the body of a WithStatement to hoist declarations.
+         * Creates an assignment expression for a non-exported variable declaration.
          *
-         * @param node The statement to visit.
+         * @param name The name of the variable.
+         * @param value The value of the variable's initializer.
+         * @param location The source map location for the assignment.
          */
-        function visitWithStatement(node: WithStatement) {
-            const statement = visitNode(node.statement, visitNestedNode, isStatement, /*optional*/ false, liftToBlock);
-            if (statement !== node.statement) {
-                const updated = getMutableClone(node);
-                updated.statement = statement;
-                return updated;
-            }
-            return node;
+        function createNonExportedVariableAssignment(name: Identifier, value: Expression, location?: TextRange) {
+            return createVariableAssignment(name, value, location, /*isExportedDeclaration*/ false);
         }
 
         /**
-         * Visits the body of a SwitchStatement to hoist declarations.
+         * Creates an assignment expression for a variable declaration.
          *
-         * @param node The statement to visit.
+         * @param name The name of the variable.
+         * @param value The value of the variable's initializer.
+         * @param location The source map location for the assignment.
+         * @param isExportedDeclaration A value indicating whether the variable is exported.
          */
-        function visitSwitchStatement(node: SwitchStatement) {
-            const caseBlock = visitNode(node.caseBlock, visitNestedNode, isCaseBlock);
-            if (caseBlock !== node.caseBlock) {
-                const updated = getMutableClone(node);
-                updated.caseBlock = caseBlock;
-                return updated;
-            }
-            return node;
+        function createVariableAssignment(name: Identifier, value: Expression, location: TextRange, isExportedDeclaration: boolean) {
+            hoistVariableDeclaration(getSynthesizedClone(name));
+            return isExportedDeclaration
+                ? createExportExpression(name, preventSubstitution(setTextRange(createAssignment(name, value), location)))
+                : preventSubstitution(setTextRange(createAssignment(name, value), location));
         }
 
         /**
-         * Visits the body of a CaseBlock to hoist declarations.
+         * Visits a MergeDeclarationMarker used as a placeholder for the beginning of a merged
+         * and transformed declaration.
          *
          * @param node The node to visit.
          */
-        function visitCaseBlock(node: CaseBlock) {
-            const clauses = visitNodes(node.clauses, visitNestedNode, isCaseOrDefaultClause);
-            if (clauses !== node.clauses) {
-                const updated = getMutableClone(node);
-                updated.clauses = clauses;
-                return updated;
+        function visitMergeDeclarationMarker(node: MergeDeclarationMarker): VisitResult<Statement> {
+            // For an EnumDeclaration or ModuleDeclaration that merges with a preceeding
+            // declaration we do not emit a leading variable declaration. To preserve the
+            // begin/end semantics of the declararation and to properly handle exports
+            // we wrapped the leading variable declaration in a `MergeDeclarationMarker`.
+            //
+            // To balance the declaration, we defer the exports of the elided variable
+            // statement until we visit this declaration's `EndOfDeclarationMarker`.
+            if (hasAssociatedEndOfDeclarationMarker(node) && node.original.kind === SyntaxKind.VariableStatement) {
+                const id = getOriginalNodeId(node);
+                const isExportedDeclaration = hasModifier(node.original, ModifierFlags.Export);
+                deferredExports[id] = appendExportsOfVariableStatement(deferredExports[id], <VariableStatement>node.original, isExportedDeclaration);
             }
-            return node;
-        }
 
-        /**
-         * Visits the body of a CaseClause to hoist declarations.
-         *
-         * @param node The clause to visit.
-         */
-        function visitCaseClause(node: CaseClause) {
-            const statements = visitNodes(node.statements, visitNestedNode, isStatement);
-            if (statements !== node.statements) {
-                const updated = getMutableClone(node);
-                updated.statements = statements;
-                return updated;
-            }
             return node;
         }
 
         /**
-         * Visits the body of a DefaultClause to hoist declarations.
-         *
-         * @param node The clause to visit.
-         */
-        function visitDefaultClause(node: DefaultClause) {
-            return visitEachChild(node, visitNestedNode, context);
-        }
-
-        /**
-         * Visits the body of a TryStatement to hoist declarations.
+         * Determines whether a node has an associated EndOfDeclarationMarker.
          *
-         * @param node The statement to visit.
+         * @param node The node to test.
          */
-        function visitTryStatement(node: TryStatement) {
-            return visitEachChild(node, visitNestedNode, context);
+        function hasAssociatedEndOfDeclarationMarker(node: Node) {
+            return (getEmitFlags(node) & EmitFlags.HasEndOfDeclarationMarker) !== 0;
         }
 
         /**
-         * Visits the body of a CatchClause to hoist declarations.
+         * Visits a DeclarationMarker used as a placeholder for the end of a transformed
+         * declaration.
          *
-         * @param node The clause to visit.
+         * @param node The node to visit.
          */
-        function visitCatchClause(node: CatchClause) {
-            const block = visitNode(node.block, visitNestedNode, isBlock);
-            if (block !== node.block) {
-                const updated = getMutableClone(node);
-                updated.block = block;
-                return updated;
+        function visitEndOfDeclarationMarker(node: EndOfDeclarationMarker): VisitResult<Statement> {
+            // For some transformations we emit an `EndOfDeclarationMarker` to mark the actual
+            // end of the transformed declaration. We use this marker to emit any deferred exports
+            // of the declaration.
+            const id = getOriginalNodeId(node);
+            const statements = deferredExports[id];
+            if (statements) {
+                delete deferredExports[id];
+                return append(statements, node);
             }
+
             return node;
         }
 
         /**
-         * Visits the body of a Block to hoist declarations.
+         * Appends the exports of an ImportDeclaration to a statement list, returning the
+         * statement list.
          *
-         * @param node The block to visit.
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param decl The declaration whose exports are to be recorded.
          */
-        function visitBlock(node: Block) {
-            return visitEachChild(node, visitNestedNode, context);
-        }
+        function appendExportsOfImportDeclaration(statements: Statement[], decl: ImportDeclaration) {
+            if (moduleInfo.exportEquals) {
+                return statements;
+            }
 
-        //
-        // Substitutions
-        //
+            const importClause = decl.importClause;
+            if (!importClause) {
+                return statements;
+            }
 
-        function onEmitNode(emitContext: EmitContext, node: Node, emitCallback: (emitContext: EmitContext, node: Node) => void): void {
-            if (node.kind === SyntaxKind.SourceFile) {
-                exportFunctionForFile = exportFunctionForFileMap[getOriginalNodeId(node)];
-                previousOnEmitNode(emitContext, node, emitCallback);
-                exportFunctionForFile = undefined;
+            if (importClause.name) {
+                statements = appendExportsOfDeclaration(statements, importClause);
             }
-            else {
-                previousOnEmitNode(emitContext, node, emitCallback);
+
+            const namedBindings = importClause.namedBindings;
+            if (namedBindings) {
+                switch (namedBindings.kind) {
+                    case SyntaxKind.NamespaceImport:
+                        statements = appendExportsOfDeclaration(statements, namedBindings);
+                        break;
+
+                    case SyntaxKind.NamedImports:
+                        for (const importBinding of namedBindings.elements) {
+                            statements = appendExportsOfDeclaration(statements, importBinding);
+                        }
+
+                        break;
+                }
             }
+
+            return statements;
         }
 
         /**
-         * Hooks node substitutions.
+         * Appends the export of an ImportEqualsDeclaration to a statement list, returning the
+         * statement list.
          *
-         * @param node The node to substitute.
-         * @param isExpression A value indicating whether the node is to be used in an expression
-         *                     position.
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param decl The declaration whose exports are to be recorded.
          */
-        function onSubstituteNode(emitContext: EmitContext, node: Node) {
-            node = previousOnSubstituteNode(emitContext, node);
-            if (emitContext === EmitContext.Expression) {
-                return substituteExpression(<Expression>node);
+        function appendExportsOfImportEqualsDeclaration(statements: Statement[], decl: ImportEqualsDeclaration): Statement[] | undefined {
+            if (moduleInfo.exportEquals) {
+                return statements;
             }
 
-            return node;
+            return appendExportsOfDeclaration(statements, decl);
         }
 
         /**
-         * Substitute the expression, if necessary.
+         * Appends the exports of a VariableStatement to a statement list, returning the statement
+         * list.
          *
-         * @param node The node to substitute.
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param node The VariableStatement whose exports are to be recorded.
+         * @param exportSelf A value indicating whether to also export each VariableDeclaration of
+         * `nodes` declaration list.
          */
-        function substituteExpression(node: Expression) {
-            switch (node.kind) {
-                case SyntaxKind.Identifier:
-                    return substituteExpressionIdentifier(<Identifier>node);
-                case SyntaxKind.BinaryExpression:
-                    return substituteBinaryExpression(<BinaryExpression>node);
-                case SyntaxKind.PrefixUnaryExpression:
-                case SyntaxKind.PostfixUnaryExpression:
-                    return substituteUnaryExpression(<PrefixUnaryExpression | PostfixUnaryExpression>node);
+        function appendExportsOfVariableStatement(statements: Statement[] | undefined, node: VariableStatement, exportSelf: boolean): Statement[] | undefined {
+            if (moduleInfo.exportEquals) {
+                return statements;
             }
-            return node;
-        }
 
-        /**
-         * Substitution for identifiers exported at the top level of a module.
-         */
-        function substituteExpressionIdentifier(node: Identifier): Expression {
-            const importDeclaration = resolver.getReferencedImportDeclaration(node);
-            if (importDeclaration) {
-                const importBinding = createImportBinding(importDeclaration);
-                if (importBinding) {
-                    return importBinding;
+            for (const decl of node.declarationList.declarations) {
+                if (decl.initializer || exportSelf) {
+                    statements = appendExportsOfBindingElement(statements, decl, exportSelf);
                 }
             }
 
-            return node;
+            return statements;
         }
 
-        function substituteBinaryExpression(node: BinaryExpression): Expression {
-            if (isAssignmentOperator(node.operatorToken.kind)) {
-                return substituteAssignmentExpression(node);
+        /**
+         * Appends the exports of a VariableDeclaration or BindingElement to a statement list,
+         * returning the statement list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param decl The declaration whose exports are to be recorded.
+         * @param exportSelf A value indicating whether to also export the declaration itself.
+         */
+        function appendExportsOfBindingElement(statements: Statement[] | undefined, decl: VariableDeclaration | BindingElement, exportSelf: boolean): Statement[] | undefined {
+            if (moduleInfo.exportEquals) {
+                return statements;
             }
 
-            return node;
-        }
-
-        function substituteAssignmentExpression(node: BinaryExpression): Expression {
-            setEmitFlags(node, EmitFlags.NoSubstitution);
-
-            const left = node.left;
-            switch (left.kind) {
-                case SyntaxKind.Identifier:
-                    const exportDeclaration = resolver.getReferencedExportContainer(<Identifier>left);
-                    if (exportDeclaration) {
-                        return createExportExpression(<Identifier>left, node);
-                    }
-                    break;
-
-                case SyntaxKind.ObjectLiteralExpression:
-                case SyntaxKind.ArrayLiteralExpression:
-                    if (hasExportedReferenceInDestructuringPattern(<ObjectLiteralExpression | ArrayLiteralExpression>left)) {
-                        return substituteDestructuring(node);
+            if (isBindingPattern(decl.name)) {
+                for (const element of decl.name.elements) {
+                    if (!isOmittedExpression(element)) {
+                        statements = appendExportsOfBindingElement(statements, element, exportSelf);
                     }
-                    break;
+                }
             }
+            else if (!isGeneratedIdentifier(decl.name)) {
+                let excludeName: string;
+                if (exportSelf) {
+                    statements = appendExportStatement(statements, decl.name, getLocalName(decl));
+                    excludeName = decl.name.text;
+                }
 
-            return node;
-        }
-
-        function isExportedBinding(name: Identifier) {
-            const container = resolver.getReferencedExportContainer(name);
-            return container && container.kind === SyntaxKind.SourceFile;
-        }
-
-        function hasExportedReferenceInDestructuringPattern(node: ObjectLiteralExpression | ArrayLiteralExpression | Identifier): boolean {
-            switch (node.kind) {
-                case SyntaxKind.Identifier:
-                    return isExportedBinding(<Identifier>node);
-
-                case SyntaxKind.ObjectLiteralExpression:
-                    for (const property of (<ObjectLiteralExpression>node).properties) {
-                        if (hasExportedReferenceInObjectDestructuringElement(property)) {
-                            return true;
-                        }
-                    }
-
-                    break;
-
-                case SyntaxKind.ArrayLiteralExpression:
-                    for (const element of (<ArrayLiteralExpression>node).elements) {
-                        if (hasExportedReferenceInArrayDestructuringElement(element)) {
-                            return true;
-                        }
-                    }
-
-                    break;
+                statements = appendExportsOfDeclaration(statements, decl, excludeName);
             }
 
-            return false;
+            return statements;
         }
 
-        function hasExportedReferenceInObjectDestructuringElement(node: ObjectLiteralElementLike): boolean {
-            if (isShorthandPropertyAssignment(node)) {
-                return isExportedBinding(node.name);
-            }
-            else if (isPropertyAssignment(node)) {
-                return hasExportedReferenceInDestructuringElement(node.initializer);
-            }
-            else {
-                return false;
+        /**
+         * Appends the exports of a ClassDeclaration or FunctionDeclaration to a statement list,
+         * returning the statement list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param decl The declaration whose exports are to be recorded.
+         */
+        function appendExportsOfHoistedDeclaration(statements: Statement[] | undefined, decl: ClassDeclaration | FunctionDeclaration): Statement[] | undefined {
+            if (moduleInfo.exportEquals) {
+                return statements;
             }
-        }
 
-        function hasExportedReferenceInArrayDestructuringElement(node: Expression): boolean {
-            if (isSpreadElementExpression(node)) {
-                const expression = node.expression;
-                return isIdentifier(expression) && isExportedBinding(expression);
-            }
-            else {
-                return hasExportedReferenceInDestructuringElement(node);
+            let excludeName: string;
+            if (hasModifier(decl, ModifierFlags.Export)) {
+                const exportName = hasModifier(decl, ModifierFlags.Default) ? createLiteral("default") : decl.name;
+                statements = appendExportStatement(statements, exportName, getLocalName(decl));
+                excludeName = exportName.text;
             }
-        }
 
-        function hasExportedReferenceInDestructuringElement(node: Expression): boolean {
-            if (isBinaryExpression(node)) {
-                const left = node.left;
-                return node.operatorToken.kind === SyntaxKind.EqualsToken
-                    && isDestructuringPattern(left)
-                    && hasExportedReferenceInDestructuringPattern(left);
-            }
-            else if (isIdentifier(node)) {
-                return isExportedBinding(node);
-            }
-            else if (isSpreadElementExpression(node)) {
-                const expression = node.expression;
-                return isIdentifier(expression) && isExportedBinding(expression);
-            }
-            else if (isDestructuringPattern(node)) {
-                return hasExportedReferenceInDestructuringPattern(node);
+            if (decl.name) {
+                statements = appendExportsOfDeclaration(statements, decl, excludeName);
             }
-            else {
-                return false;
-            }
-        }
 
-        function isDestructuringPattern(node: Expression): node is ObjectLiteralExpression | ArrayLiteralExpression | Identifier {
-            const kind = node.kind;
-            return kind === SyntaxKind.Identifier
-                || kind === SyntaxKind.ObjectLiteralExpression
-                || kind === SyntaxKind.ArrayLiteralExpression;
-        }
-
-        function substituteDestructuring(node: BinaryExpression) {
-            return flattenDestructuringAssignment(context, node, /*needsValue*/ true, hoistVariableDeclaration);
+            return statements;
         }
 
-        function substituteUnaryExpression(node: PrefixUnaryExpression | PostfixUnaryExpression): Expression {
-            const operand = node.operand;
-            const operator = node.operator;
-            const substitute =
-                isIdentifier(operand) &&
-                (
-                    node.kind === SyntaxKind.PostfixUnaryExpression ||
-                    (node.kind === SyntaxKind.PrefixUnaryExpression && (operator === SyntaxKind.PlusPlusToken || operator === SyntaxKind.MinusMinusToken))
-                );
+        /**
+         * Appends the exports of a declaration to a statement list, returning the statement list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param decl The declaration to export.
+         * @param excludeName An optional name to exclude from exports.
+         */
+        function appendExportsOfDeclaration(statements: Statement[] | undefined, decl: Declaration, excludeName?: string): Statement[] | undefined {
+            if (moduleInfo.exportEquals) {
+                return statements;
+            }
 
-            if (substitute) {
-                const exportDeclaration = resolver.getReferencedExportContainer(<Identifier>operand);
-                if (exportDeclaration) {
-                    const expr = createPrefix(node.operator, operand, node);
-                    setEmitFlags(expr, EmitFlags.NoSubstitution);
-                    const call = createExportExpression(<Identifier>operand, expr);
-                    if (node.kind === SyntaxKind.PrefixUnaryExpression) {
-                        return call;
-                    }
-                    else {
-                        // export function returns the value that was passes as the second argument
-                        // however for postfix unary expressions result value should be the value before modification.
-                        // emit 'x++' as '(export('x', ++x) - 1)' and 'x--' as '(export('x', --x) + 1)'
-                        return operator === SyntaxKind.PlusPlusToken
-                            ? createSubtract(call, createLiteral(1))
-                            : createAdd(call, createLiteral(1));
+            const name = getDeclarationName(decl);
+            const exportSpecifiers = moduleInfo.exportSpecifiers.get(name.text);
+            if (exportSpecifiers) {
+                for (const exportSpecifier of exportSpecifiers) {
+                    if (exportSpecifier.name.text !== excludeName) {
+                        statements = appendExportStatement(statements, exportSpecifier.name, name);
                     }
                 }
             }
-            return node;
+            return statements;
         }
 
         /**
-         * Gets a name to use for a DeclarationStatement.
-         * @param node The declaration statement.
+         * Appends the down-level representation of an export to a statement list, returning the
+         * statement list.
+         *
+         * @param statements A statement list to which the down-level export statements are to be
+         * appended. If `statements` is `undefined`, a new array is allocated if statements are
+         * appended.
+         * @param exportName The name of the export.
+         * @param expression The expression to export.
+         * @param allowComments Whether to allow comments on the export.
          */
-        function getDeclarationName(node: DeclarationStatement) {
-            return node.name ? getSynthesizedClone(node.name) : getGeneratedNameForNode(node);
-        }
-
-        function addExportStarFunction(statements: Statement[], localNames: Identifier) {
-            const exportStarFunction = createUniqueName("exportStar");
-            const m = createIdentifier("m");
-            const n = createIdentifier("n");
-            const exports = createIdentifier("exports");
-            let condition: Expression = createStrictInequality(n, createLiteral("default"));
-            if (localNames) {
-                condition = createLogicalAnd(
-                    condition,
-                    createLogicalNot(createHasOwnProperty(localNames, n))
-                );
-            }
-
-            statements.push(
-                createFunctionDeclaration(
-                    /*decorators*/ undefined,
-                    /*modifiers*/ undefined,
-                    /*asteriskToken*/ undefined,
-                    exportStarFunction,
-                    /*typeParameters*/ undefined,
-                    [createParameter(m)],
-                    /*type*/ undefined,
-                    createBlock([
-                        createVariableStatement(
-                            /*modifiers*/ undefined,
-                            createVariableDeclarationList([
-                                createVariableDeclaration(
-                                    exports,
-                                    /*type*/ undefined,
-                                    createObjectLiteral([])
-                                )
-                            ])
-                        ),
-                        createForIn(
-                            createVariableDeclarationList([
-                                createVariableDeclaration(n, /*type*/ undefined)
-                            ]),
-                            m,
-                            createBlock([
-                                setEmitFlags(
-                                    createIf(
-                                        condition,
-                                        createStatement(
-                                            createAssignment(
-                                                createElementAccess(exports, n),
-                                                createElementAccess(m, n)
-                                            )
-                                        )
-                                    ),
-                                    EmitFlags.SingleLine
-                                )
-                            ])
-                        ),
-                        createStatement(
-                            createCall(
-                                exportFunctionForFile,
-                                /*typeArguments*/ undefined,
-                                [exports]
-                            )
-                        )
-                    ],
-                    /*location*/ undefined,
-                    /*multiline*/ true)
-                )
-            );
-
-            return exportStarFunction;
+        function appendExportStatement(statements: Statement[] | undefined, exportName: Identifier | StringLiteral, expression: Expression, allowComments?: boolean): Statement[] | undefined {
+            statements = append(statements, createExportStatement(exportName, expression, allowComments));
+            return statements;
         }
 
         /**
          * Creates a call to the current file's export function to export a value.
+         *
          * @param name The bound name of the export.
          * @param value The exported value.
+         * @param allowComments An optional value indicating whether to emit comments for the statement.
          */
-        function createExportExpression(name: Identifier | StringLiteral, value: Expression) {
-            const exportName = isIdentifier(name) ? createLiteral(name.text) : name;
-            return createCall(exportFunctionForFile, /*typeArguments*/ undefined, [exportName, value]);
+        function createExportStatement(name: Identifier | StringLiteral, value: Expression, allowComments?: boolean) {
+            const statement = createStatement(createExportExpression(name, value));
+            startOnNewLine(statement);
+            if (!allowComments) {
+                setEmitFlags(statement, EmitFlags.NoComments);
+            }
+
+            return statement;
         }
 
         /**
          * Creates a call to the current file's export function to export a value.
+         *
          * @param name The bound name of the export.
          * @param value The exported value.
          */
-        function createExportStatement(name: Identifier | StringLiteral, value: Expression) {
-            return createStatement(createExportExpression(name, value));
+        function createExportExpression(name: Identifier | StringLiteral, value: Expression) {
+            const exportName = isIdentifier(name) ? createLiteral(name) : name;
+            return createCall(exportFunction, /*typeArguments*/ undefined, [exportName, value]);
         }
 
+        //
+        // Top-Level or Nested Source Element Visitors
+        //
+
         /**
-         * Creates a call to the current file's export function to export a declaration.
-         * @param node The declaration to export.
+         * Visit nested elements at the top-level of a module.
+         *
+         * @param node The node to visit.
          */
-        function createDeclarationExport(node: DeclarationStatement) {
-            const declarationName = getDeclarationName(node);
-            const exportName = hasModifier(node, ModifierFlags.Default) ? createLiteral("default") : declarationName;
-            return createExportStatement(exportName, declarationName);
-        }
+        function nestedElementVisitor(node: Node): VisitResult<Node> {
+            switch (node.kind) {
+                case SyntaxKind.VariableStatement:
+                    return visitVariableStatement(<VariableStatement>node);
 
-        function createImportBinding(importDeclaration: Declaration): LeftHandSideExpression {
-            let importAlias: Identifier;
-            let name: Identifier;
-            if (isImportClause(importDeclaration)) {
-                importAlias = getGeneratedNameForNode(importDeclaration.parent);
-                name = createIdentifier("default");
-            }
-            else if (isImportSpecifier(importDeclaration)) {
-                importAlias = getGeneratedNameForNode(importDeclaration.parent.parent.parent);
-                name = importDeclaration.propertyName || importDeclaration.name;
-            }
-            else {
-                return undefined;
-            }
+                case SyntaxKind.FunctionDeclaration:
+                    return visitFunctionDeclaration(<FunctionDeclaration>node);
 
-            if (name.originalKeywordKind && languageVersion === ScriptTarget.ES3) {
-                return createElementAccess(importAlias, createLiteral(name.text));
-            }
-            else {
-                return createPropertyAccess(importAlias, getSynthesizedClone(name));
-            }
-        }
+                case SyntaxKind.ClassDeclaration:
+                    return visitClassDeclaration(<ClassDeclaration>node);
 
-        function collectDependencyGroups(externalImports: (ImportDeclaration | ImportEqualsDeclaration | ExportDeclaration)[]) {
-            const groupIndices = createMap<number>();
-            const dependencyGroups: DependencyGroup[] = [];
-            for (let i = 0; i < externalImports.length; i++) {
-                const externalImport = externalImports[i];
-                const externalModuleName = getExternalModuleNameLiteral(externalImport, currentSourceFile, host, resolver, compilerOptions);
-                const text = externalModuleName.text;
-                if (hasProperty(groupIndices, text)) {
-                    // deduplicate/group entries in dependency list by the dependency name
-                    const groupIndex = groupIndices[text];
-                    dependencyGroups[groupIndex].externalImports.push(externalImport);
-                    continue;
-                }
-                else {
-                    groupIndices[text] = dependencyGroups.length;
-                    dependencyGroups.push({
-                        name: externalModuleName,
-                        externalImports: [externalImport]
-                    });
-                }
-            }
+                case SyntaxKind.ForStatement:
+                    return visitForStatement(<ForStatement>node);
 
-            return dependencyGroups;
-        }
+                case SyntaxKind.ForInStatement:
+                    return visitForInStatement(<ForInStatement>node);
 
-        function getNameOfDependencyGroup(dependencyGroup: DependencyGroup) {
-            return dependencyGroup.name;
-        }
+                case SyntaxKind.ForOfStatement:
+                    return visitForOfStatement(<ForOfStatement>node);
 
-        function recordExportName(name: Identifier) {
-            if (!exportedLocalNames) {
-                exportedLocalNames = [];
-            }
+                case SyntaxKind.DoStatement:
+                    return visitDoStatement(<DoStatement>node);
 
-            exportedLocalNames.push(name);
+                case SyntaxKind.WhileStatement:
+                    return visitWhileStatement(<WhileStatement>node);
+
+                case SyntaxKind.LabeledStatement:
+                    return visitLabeledStatement(<LabeledStatement>node);
+
+                case SyntaxKind.WithStatement:
+                    return visitWithStatement(<WithStatement>node);
+
+                case SyntaxKind.SwitchStatement:
+                    return visitSwitchStatement(<SwitchStatement>node);
+
+                case SyntaxKind.CaseBlock:
+                    return visitCaseBlock(<CaseBlock>node);
+
+                case SyntaxKind.CaseClause:
+                    return visitCaseClause(<CaseClause>node);
+
+                case SyntaxKind.DefaultClause:
+                    return visitDefaultClause(<DefaultClause>node);
+
+                case SyntaxKind.TryStatement:
+                    return visitTryStatement(<TryStatement>node);
+
+                case SyntaxKind.CatchClause:
+                    return visitCatchClause(<CatchClause>node);
+
+                case SyntaxKind.Block:
+                    return visitBlock(<Block>node);
+
+                case SyntaxKind.MergeDeclarationMarker:
+                    return visitMergeDeclarationMarker(<MergeDeclarationMarker>node);
+
+                case SyntaxKind.EndOfDeclarationMarker:
+                    return visitEndOfDeclarationMarker(<EndOfDeclarationMarker>node);
+
+                default:
+                    return destructuringAndImportCallVisitor(node);
+            }
+        }
+
+        /**
+         * Visits the body of a ForStatement to hoist declarations.
+         *
+         * @param node The node to visit.
+         */
+        function visitForStatement(node: ForStatement): VisitResult<Statement> {
+            const savedEnclosingBlockScopedContainer = enclosingBlockScopedContainer;
+            enclosingBlockScopedContainer = node;
+
+            node = updateFor(
+                node,
+                visitForInitializer(node.initializer),
+                visitNode(node.condition, destructuringAndImportCallVisitor, isExpression),
+                visitNode(node.incrementor, destructuringAndImportCallVisitor, isExpression),
+                visitNode(node.statement, nestedElementVisitor, isStatement)
+            );
+
+            enclosingBlockScopedContainer = savedEnclosingBlockScopedContainer;
+            return node;
         }
 
-        function recordExportedFunctionDeclaration(node: FunctionDeclaration) {
-            if (!exportedFunctionDeclarations) {
-                exportedFunctionDeclarations = [];
+        /**
+         * Visits the body of a ForInStatement to hoist declarations.
+         *
+         * @param node The node to visit.
+         */
+        function visitForInStatement(node: ForInStatement): VisitResult<Statement> {
+            const savedEnclosingBlockScopedContainer = enclosingBlockScopedContainer;
+            enclosingBlockScopedContainer = node;
+
+            node = updateForIn(
+                node,
+                visitForInitializer(node.initializer),
+                visitNode(node.expression, destructuringAndImportCallVisitor, isExpression),
+                visitNode(node.statement, nestedElementVisitor, isStatement, liftToBlock)
+            );
+
+            enclosingBlockScopedContainer = savedEnclosingBlockScopedContainer;
+            return node;
+        }
+
+        /**
+         * Visits the body of a ForOfStatement to hoist declarations.
+         *
+         * @param node The node to visit.
+         */
+        function visitForOfStatement(node: ForOfStatement): VisitResult<Statement> {
+            const savedEnclosingBlockScopedContainer = enclosingBlockScopedContainer;
+            enclosingBlockScopedContainer = node;
+
+            node = updateForOf(
+                node,
+                node.awaitModifier,
+                visitForInitializer(node.initializer),
+                visitNode(node.expression, destructuringAndImportCallVisitor, isExpression),
+                visitNode(node.statement, nestedElementVisitor, isStatement, liftToBlock)
+            );
+
+            enclosingBlockScopedContainer = savedEnclosingBlockScopedContainer;
+            return node;
+        }
+
+        /**
+         * Determines whether to hoist the initializer of a ForStatement, ForInStatement, or
+         * ForOfStatement.
+         *
+         * @param node The node to test.
+         */
+        function shouldHoistForInitializer(node: ForInitializer): node is VariableDeclarationList {
+            return isVariableDeclarationList(node)
+                && shouldHoistVariableDeclarationList(node);
+        }
+
+        /**
+         * Visits the initializer of a ForStatement, ForInStatement, or ForOfStatement
+         *
+         * @param node The node to visit.
+         */
+        function visitForInitializer(node: ForInitializer): ForInitializer {
+            if (!node) {
+                return node;
             }
 
-            exportedFunctionDeclarations.push(createDeclarationExport(node));
+            if (shouldHoistForInitializer(node)) {
+                let expressions: Expression[];
+                for (const variable of node.declarations) {
+                    expressions = append(expressions, transformInitializedVariable(variable, /*isExportedDeclaration*/ false));
+                }
+
+                return expressions ? inlineExpressions(expressions) : createOmittedExpression();
+            }
+            else {
+                return visitEachChild(node, nestedElementVisitor, context);
+            }
         }
 
-        function hoistBindingElement(node: VariableDeclaration | ArrayBindingElement, isExported: boolean): void {
-            if (isOmittedExpression(node)) {
-                return;
+        /**
+         * Visits the body of a DoStatement to hoist declarations.
+         *
+         * @param node The node to visit.
+         */
+        function visitDoStatement(node: DoStatement): VisitResult<Statement> {
+            return updateDo(
+                node,
+                visitNode(node.statement, nestedElementVisitor, isStatement, liftToBlock),
+                visitNode(node.expression, destructuringAndImportCallVisitor, isExpression)
+            );
+        }
+
+        /**
+         * Visits the body of a WhileStatement to hoist declarations.
+         *
+         * @param node The node to visit.
+         */
+        function visitWhileStatement(node: WhileStatement): VisitResult<Statement> {
+            return updateWhile(
+                node,
+                visitNode(node.expression, destructuringAndImportCallVisitor, isExpression),
+                visitNode(node.statement, nestedElementVisitor, isStatement, liftToBlock)
+            );
+        }
+
+        /**
+         * Visits the body of a LabeledStatement to hoist declarations.
+         *
+         * @param node The node to visit.
+         */
+        function visitLabeledStatement(node: LabeledStatement): VisitResult<Statement> {
+            return updateLabel(
+                node,
+                node.label,
+                visitNode(node.statement, nestedElementVisitor, isStatement, liftToBlock)
+            );
+        }
+
+        /**
+         * Visits the body of a WithStatement to hoist declarations.
+         *
+         * @param node The node to visit.
+         */
+        function visitWithStatement(node: WithStatement): VisitResult<Statement> {
+            return updateWith(
+                node,
+                visitNode(node.expression, destructuringAndImportCallVisitor, isExpression),
+                visitNode(node.statement, nestedElementVisitor, isStatement, liftToBlock)
+            );
+        }
+
+        /**
+         * Visits the body of a SwitchStatement to hoist declarations.
+         *
+         * @param node The node to visit.
+         */
+        function visitSwitchStatement(node: SwitchStatement): VisitResult<Statement> {
+            return updateSwitch(
+                node,
+                visitNode(node.expression, destructuringAndImportCallVisitor, isExpression),
+                visitNode(node.caseBlock, nestedElementVisitor, isCaseBlock)
+            );
+        }
+
+        /**
+         * Visits the body of a CaseBlock to hoist declarations.
+         *
+         * @param node The node to visit.
+         */
+        function visitCaseBlock(node: CaseBlock): CaseBlock {
+            const savedEnclosingBlockScopedContainer = enclosingBlockScopedContainer;
+            enclosingBlockScopedContainer = node;
+
+            node = updateCaseBlock(
+                node,
+                visitNodes(node.clauses, nestedElementVisitor, isCaseOrDefaultClause)
+            );
+
+            enclosingBlockScopedContainer = savedEnclosingBlockScopedContainer;
+            return node;
+        }
+
+        /**
+         * Visits the body of a CaseClause to hoist declarations.
+         *
+         * @param node The node to visit.
+         */
+        function visitCaseClause(node: CaseClause): VisitResult<CaseOrDefaultClause> {
+            return updateCaseClause(
+                node,
+                visitNode(node.expression, destructuringAndImportCallVisitor, isExpression),
+                visitNodes(node.statements, nestedElementVisitor, isStatement)
+            );
+        }
+
+        /**
+         * Visits the body of a DefaultClause to hoist declarations.
+         *
+         * @param node The node to visit.
+         */
+        function visitDefaultClause(node: DefaultClause): VisitResult<CaseOrDefaultClause> {
+            return visitEachChild(node, nestedElementVisitor, context);
+        }
+
+        /**
+         * Visits the body of a TryStatement to hoist declarations.
+         *
+         * @param node The node to visit.
+         */
+        function visitTryStatement(node: TryStatement): VisitResult<Statement> {
+            return visitEachChild(node, nestedElementVisitor, context);
+        }
+
+        /**
+         * Visits the body of a CatchClause to hoist declarations.
+         *
+         * @param node The node to visit.
+         */
+        function visitCatchClause(node: CatchClause): CatchClause {
+            const savedEnclosingBlockScopedContainer = enclosingBlockScopedContainer;
+            enclosingBlockScopedContainer = node;
+
+            node = updateCatchClause(
+                node,
+                node.variableDeclaration,
+                visitNode(node.block, nestedElementVisitor, isBlock)
+            );
+
+            enclosingBlockScopedContainer = savedEnclosingBlockScopedContainer;
+            return node;
+        }
+
+        /**
+         * Visits the body of a Block to hoist declarations.
+         *
+         * @param node The node to visit.
+         */
+        function visitBlock(node: Block): Block {
+            const savedEnclosingBlockScopedContainer = enclosingBlockScopedContainer;
+            enclosingBlockScopedContainer = node;
+
+            node = visitEachChild(node, nestedElementVisitor, context);
+
+            enclosingBlockScopedContainer = savedEnclosingBlockScopedContainer;
+            return node;
+        }
+
+        //
+        // Destructuring Assignment Visitors
+        //
+
+        /**
+         * Visit nodes to flatten destructuring assignments to exported symbols.
+         *
+         * @param node The node to visit.
+         */
+        function destructuringAndImportCallVisitor(node: Node): VisitResult<Node> {
+            if (node.transformFlags & TransformFlags.DestructuringAssignment
+                && node.kind === SyntaxKind.BinaryExpression) {
+                return visitDestructuringAssignment(<DestructuringAssignment>node);
+            }
+            else if (isImportCall(node)) {
+                return visitImportCallExpression(node);
+            }
+            else if ((node.transformFlags & TransformFlags.ContainsDestructuringAssignment) || (node.transformFlags & TransformFlags.ContainsDynamicImport)) {
+                return visitEachChild(node, destructuringAndImportCallVisitor, context);
+            }
+            else {
+                return node;
+            }
+        }
+
+        function visitImportCallExpression(node: ImportCall): Expression {
+            // import("./blah")
+            // emit as
+            // System.register([], function (_export, _context) {
+            //     return {
+            //         setters: [],
+            //         execute: () => {
+            //             _context.import('./blah');
+            //         }
+            //     };
+            // });
+            return createCall(
+                createPropertyAccess(
+                    contextObject,
+                    createIdentifier("import")
+                ),
+                /*typeArguments*/ undefined,
+                node.arguments
+            );
+        }
+
+        /**
+         * Visits a DestructuringAssignment to flatten destructuring to exported symbols.
+         *
+         * @param node The node to visit.
+         */
+        function visitDestructuringAssignment(node: DestructuringAssignment): VisitResult<Expression> {
+            if (hasExportedReferenceInDestructuringTarget(node.left)) {
+                return flattenDestructuringAssignment(
+                    node,
+                    destructuringAndImportCallVisitor,
+                    context,
+                    FlattenLevel.All,
+                    /*needsValue*/ true
+                );
+            }
+
+            return visitEachChild(node, destructuringAndImportCallVisitor, context);
+        }
+
+        /**
+         * Determines whether the target of a destructuring assigment refers to an exported symbol.
+         *
+         * @param node The destructuring target.
+         */
+        function hasExportedReferenceInDestructuringTarget(node: Expression | ObjectLiteralElementLike): boolean {
+            if (isAssignmentExpression(node, /*excludeCompoundAssignment*/ true)) {
+                return hasExportedReferenceInDestructuringTarget(node.left);
+            }
+            else if (isSpreadElement(node)) {
+                return hasExportedReferenceInDestructuringTarget(node.expression);
+            }
+            else if (isObjectLiteralExpression(node)) {
+                return some(node.properties, hasExportedReferenceInDestructuringTarget);
+            }
+            else if (isArrayLiteralExpression(node)) {
+                return some(node.elements, hasExportedReferenceInDestructuringTarget);
+            }
+            else if (isShorthandPropertyAssignment(node)) {
+                return hasExportedReferenceInDestructuringTarget(node.name);
+            }
+            else if (isPropertyAssignment(node)) {
+                return hasExportedReferenceInDestructuringTarget(node.initializer);
+            }
+            else if (isIdentifier(node)) {
+                const container = resolver.getReferencedExportContainer(node);
+                return container !== undefined && container.kind === SyntaxKind.SourceFile;
+            }
+            else {
+                return false;
+            }
+        }
+
+        //
+        // Modifier Visitors
+        //
+
+        /**
+         * Visit nodes to elide module-specific modifiers.
+         *
+         * @param node The node to visit.
+         */
+        function modifierVisitor(node: Node): VisitResult<Node> {
+            switch (node.kind) {
+                case SyntaxKind.ExportKeyword:
+                case SyntaxKind.DefaultKeyword:
+                    return undefined;
+            }
+            return node;
+        }
+
+        //
+        // Emit Notification
+        //
+
+        /**
+         * Hook for node emit notifications.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to emit.
+         * @param emitCallback A callback used to emit the node in the printer.
+         */
+        function onEmitNode(hint: EmitHint, node: Node, emitCallback: (hint: EmitHint, node: Node) => void): void {
+            if (node.kind === SyntaxKind.SourceFile) {
+                const id = getOriginalNodeId(node);
+                currentSourceFile = <SourceFile>node;
+                moduleInfo = moduleInfoMap[id];
+                exportFunction = exportFunctionsMap[id];
+                noSubstitution = noSubstitutionMap[id];
+
+                if (noSubstitution) {
+                    delete noSubstitutionMap[id];
+                }
+
+                previousOnEmitNode(hint, node, emitCallback);
+
+                currentSourceFile = undefined;
+                moduleInfo = undefined;
+                exportFunction = undefined;
+                noSubstitution = undefined;
+            }
+            else {
+                previousOnEmitNode(hint, node, emitCallback);
+            }
+        }
+
+        //
+        // Substitutions
+        //
+
+        /**
+         * Hooks node substitutions.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to substitute.
+         */
+        function onSubstituteNode(hint: EmitHint, node: Node) {
+            node = previousOnSubstituteNode(hint, node);
+            if (isSubstitutionPrevented(node)) {
+                return node;
+            }
+
+            if (hint === EmitHint.Expression) {
+                return substituteExpression(<Expression>node);
             }
 
-            const name = node.name;
-            if (isIdentifier(name)) {
-                hoistVariableDeclaration(getSynthesizedClone(name));
-                if (isExported) {
-                    recordExportName(name);
+            return node;
+        }
+
+        /**
+         * Substitute the expression, if necessary.
+         *
+         * @param node The node to substitute.
+         */
+        function substituteExpression(node: Expression) {
+            switch (node.kind) {
+                case SyntaxKind.Identifier:
+                    return substituteExpressionIdentifier(<Identifier>node);
+                case SyntaxKind.BinaryExpression:
+                    return substituteBinaryExpression(<BinaryExpression>node);
+                case SyntaxKind.PrefixUnaryExpression:
+                case SyntaxKind.PostfixUnaryExpression:
+                    return substituteUnaryExpression(<PrefixUnaryExpression | PostfixUnaryExpression>node);
+            }
+
+            return node;
+        }
+
+        /**
+         * Substitution for an Identifier expression that may contain an imported or exported symbol.
+         *
+         * @param node The node to substitute.
+         */
+        function substituteExpressionIdentifier(node: Identifier): Expression {
+            if (getEmitFlags(node) & EmitFlags.HelperName) {
+                const externalHelpersModuleName = getExternalHelpersModuleName(currentSourceFile);
+                if (externalHelpersModuleName) {
+                    return createPropertyAccess(externalHelpersModuleName, node);
+                }
+
+                return node;
+            }
+
+            // When we see an identifier in an expression position that
+            // points to an imported symbol, we should substitute a qualified
+            // reference to the imported symbol if one is needed.
+            //
+            // - We do not substitute generated identifiers for any reason.
+            // - We do not substitute identifiers tagged with the LocalName flag.
+            if (!isGeneratedIdentifier(node) && !isLocalName(node)) {
+                const importDeclaration = resolver.getReferencedImportDeclaration(node);
+                if (importDeclaration) {
+                    if (isImportClause(importDeclaration)) {
+                        return setTextRange(
+                            createPropertyAccess(
+                                getGeneratedNameForNode(importDeclaration.parent),
+                                createIdentifier("default")
+                            ),
+                            /*location*/ node
+                        );
+                    }
+                    else if (isImportSpecifier(importDeclaration)) {
+                        return setTextRange(
+                            createPropertyAccess(
+                                getGeneratedNameForNode(importDeclaration.parent.parent.parent),
+                                getSynthesizedClone(importDeclaration.propertyName || importDeclaration.name)
+                            ),
+                            /*location*/ node
+                        );
+                    }
+                }
+            }
+
+            return node;
+        }
+
+        /**
+         * Substitution for a BinaryExpression that may contain an imported or exported symbol.
+         *
+         * @param node The node to substitute.
+         */
+        function substituteBinaryExpression(node: BinaryExpression): Expression {
+            // When we see an assignment expression whose left-hand side is an exported symbol,
+            // we should ensure all exports of that symbol are updated with the correct value.
+            //
+            // - We do not substitute generated identifiers for any reason.
+            // - We do not substitute identifiers tagged with the LocalName flag.
+            // - We do not substitute identifiers that were originally the name of an enum or
+            //   namespace due to how they are transformed in TypeScript.
+            // - We only substitute identifiers that are exported at the top level.
+            if (isAssignmentOperator(node.operatorToken.kind)
+                && isIdentifier(node.left)
+                && !isGeneratedIdentifier(node.left)
+                && !isLocalName(node.left)
+                && !isDeclarationNameOfEnumOrNamespace(node.left)) {
+                const exportedNames = getExports(node.left);
+                if (exportedNames) {
+                    // For each additional export of the declaration, apply an export assignment.
+                    let expression: Expression = node;
+                    for (const exportName of exportedNames) {
+                        expression = createExportExpression(exportName, preventSubstitution(expression));
+                    }
+
+                    return expression;
                 }
             }
-            else if (isBindingPattern(name)) {
-                forEach(name.elements, isExported ? hoistExportedBindingElement : hoistNonExportedBindingElement);
+
+            return node;
+        }
+
+        /**
+         * Substitution for a UnaryExpression that may contain an imported or exported symbol.
+         *
+         * @param node The node to substitute.
+         */
+        function substituteUnaryExpression(node: PrefixUnaryExpression | PostfixUnaryExpression): Expression {
+            // When we see a prefix or postfix increment expression whose operand is an exported
+            // symbol, we should ensure all exports of that symbol are updated with the correct
+            // value.
+            //
+            // - We do not substitute generated identifiers for any reason.
+            // - We do not substitute identifiers tagged with the LocalName flag.
+            // - We do not substitute identifiers that were originally the name of an enum or
+            //   namespace due to how they are transformed in TypeScript.
+            // - We only substitute identifiers that are exported at the top level.
+            if ((node.operator === SyntaxKind.PlusPlusToken || node.operator === SyntaxKind.MinusMinusToken)
+                && isIdentifier(node.operand)
+                && !isGeneratedIdentifier(node.operand)
+                && !isLocalName(node.operand)
+                && !isDeclarationNameOfEnumOrNamespace(node.operand)) {
+                const exportedNames = getExports(node.operand);
+                if (exportedNames) {
+                    let expression: Expression = node.kind === SyntaxKind.PostfixUnaryExpression
+                        ? setTextRange(
+                            createPrefix(
+                                node.operator,
+                                node.operand
+                            ),
+                            node
+                        )
+                        : node;
+
+                    for (const exportName of exportedNames) {
+                        expression = createExportExpression(exportName, preventSubstitution(expression));
+                    }
+
+                    if (node.kind === SyntaxKind.PostfixUnaryExpression) {
+                        expression = node.operator === SyntaxKind.PlusPlusToken
+                            ? createSubtract(preventSubstitution(expression), createLiteral(1))
+                            : createAdd(preventSubstitution(expression), createLiteral(1));
+                    }
+
+                    return expression;
+                }
             }
+
+            return node;
         }
 
-        function hoistExportedBindingElement(node: VariableDeclaration | ArrayBindingElement) {
-            hoistBindingElement(node, /*isExported*/ true);
+        /**
+         * Gets the exports of a name.
+         *
+         * @param name The name.
+         */
+        function getExports(name: Identifier) {
+            let exportedNames: Identifier[];
+            if (!isGeneratedIdentifier(name)) {
+                const valueDeclaration = resolver.getReferencedImportDeclaration(name)
+                    || resolver.getReferencedValueDeclaration(name);
+
+                if (valueDeclaration) {
+                    const exportContainer = resolver.getReferencedExportContainer(name, /*prefixLocals*/ false);
+                    if (exportContainer && exportContainer.kind === SyntaxKind.SourceFile) {
+                        exportedNames = append(exportedNames, getDeclarationName(valueDeclaration));
+                    }
+
+                    exportedNames = addRange(exportedNames, moduleInfo && moduleInfo.exportedBindings[getOriginalNodeId(valueDeclaration)]);
+                }
+            }
+
+            return exportedNames;
         }
 
-        function hoistNonExportedBindingElement(node: VariableDeclaration | ArrayBindingElement) {
-            hoistBindingElement(node, /*isExported*/ false);
+        /**
+         * Prevent substitution of a node for this transformer.
+         *
+         * @param node The node which should not be substituted.
+         */
+        function preventSubstitution<T extends Node>(node: T): T {
+            if (noSubstitution === undefined) noSubstitution = [];
+            noSubstitution[getNodeId(node)] = true;
+            return node;
         }
 
-        function updateSourceFile(node: SourceFile, statements: Statement[], nodeEmitFlags: EmitFlags) {
-            const updated = getMutableClone(node);
-            updated.statements = createNodeArray(statements, node.statements);
-            setEmitFlags(updated, nodeEmitFlags);
-            return updated;
+        /**
+         * Determines whether a node should not be substituted.
+         *
+         * @param node The node to test.
+         */
+        function isSubstitutionPrevented(node: Node) {
+            return noSubstitution && node.id && noSubstitution[node.id];
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/compiler/transformers/ts.ts b/src/compiler/transformers/ts.ts
index f6e8074..bcfa598 100644
--- a/src/compiler/transformers/ts.ts
+++ b/src/compiler/transformers/ts.ts
@@ -4,8 +4,6 @@
 
 /*@internal*/
 namespace ts {
-    type SuperContainer = ClassDeclaration | MethodDeclaration | GetAccessorDeclaration | SetAccessorDeclaration | ConstructorDeclaration;
-
     /**
      * Indicates whether to emit type metadata in the new format.
      */
@@ -16,15 +14,31 @@ namespace ts {
         ClassAliases = 1 << 0,
         /** Enables substitutions for namespace exports. */
         NamespaceExports = 1 << 1,
-        /** Enables substitutions for async methods with `super` calls. */
-        AsyncMethodsWithSuper = 1 << 2,
         /* Enables substitutions for unqualified enum members */
         NonQualifiedEnumMembers = 1 << 3
     }
 
+    const enum ClassFacts {
+        None = 0,
+        HasStaticInitializedProperties = 1 << 0,
+        HasConstructorDecorators = 1 << 1,
+        HasMemberDecorators = 1 << 2,
+        IsExportOfNamespace = 1 << 3,
+        IsNamedExternalExport = 1 << 4,
+        IsDefaultExternalExport = 1 << 5,
+        HasExtendsClause = 1 << 6,
+        UseImmediatelyInvokedFunctionExpression = 1 << 7,
+
+        HasAnyDecorators = HasConstructorDecorators | HasMemberDecorators,
+        NeedsName = HasStaticInitializedProperties | HasMemberDecorators,
+        MayNeedImmediatelyInvokedFunctionExpression = HasAnyDecorators | HasStaticInitializedProperties,
+        IsExported = IsExportOfNamespace | IsDefaultExternalExport | IsNamedExternalExport,
+    }
+
     export function transformTypeScript(context: TransformationContext) {
         const {
             startLexicalEnvironment,
+            resumeLexicalEnvironment,
             endLexicalEnvironment,
             hoistVariableDeclaration,
         } = context;
@@ -52,7 +66,6 @@ namespace ts {
         let currentNamespaceContainerName: Identifier;
         let currentScope: SourceFile | Block | ModuleBlock | CaseBlock;
         let currentScopeFirstDeclarationsOfName: Map<Node>;
-        let currentSourceFileExternalHelpersModuleName: Identifier;
 
         /**
          * Keeps track of whether expression substitution has been enabled for specific edge cases.
@@ -64,7 +77,7 @@ namespace ts {
          * A map that keeps track of aliases created for classes with decorators to avoid issues
          * with the double-binding behavior of classes.
          */
-        let classAliases: Map<Identifier>;
+        let classAliases: Identifier[];
 
         /**
          * Keeps track of whether  we are within any containing namespaces when performing
@@ -72,12 +85,6 @@ namespace ts {
          */
         let applicableSubstitutions: TypeScriptSubstitutionFlags;
 
-        /**
-         * This keeps track of containers where `super` is valid, for use with
-         * just-in-time substitution for `super` expressions inside of async methods.
-         */
-        let currentSuperContainer: SuperContainer;
-
         return transformSourceFile;
 
         /**
@@ -86,11 +93,17 @@ namespace ts {
          * @param node A SourceFile node.
          */
         function transformSourceFile(node: SourceFile) {
-            if (isDeclarationFile(node)) {
+            if (node.isDeclarationFile) {
                 return node;
             }
 
-            return visitNode(node, visitor, isSourceFile);
+            currentSourceFile = node;
+
+            const visited = saveStateAndInvoke(node, visitSourceFile);
+            addEmitHelpers(visited, context.readEmitHelpers());
+
+            currentSourceFile = undefined;
+            return visited;
         }
 
         /**
@@ -117,6 +130,32 @@ namespace ts {
             return visited;
         }
 
+        /**
+         * Performs actions that should always occur immediately before visiting a node.
+         *
+         * @param node The node to visit.
+         */
+        function onBeforeVisitNode(node: Node) {
+            switch (node.kind) {
+                case SyntaxKind.SourceFile:
+                case SyntaxKind.CaseBlock:
+                case SyntaxKind.ModuleBlock:
+                case SyntaxKind.Block:
+                    currentScope = <SourceFile | CaseBlock | ModuleBlock | Block>node;
+                    currentScopeFirstDeclarationsOfName = undefined;
+                    break;
+
+                case SyntaxKind.ClassDeclaration:
+                case SyntaxKind.FunctionDeclaration:
+                    if (hasModifier(node, ModifierFlags.Ambient)) {
+                        break;
+                    }
+
+                    recordEmittedDeclarationInScope(node);
+                    break;
+            }
+        }
+
         /**
          * General-purpose node visitor.
          *
@@ -132,10 +171,7 @@ namespace ts {
          * @param node The node to visit.
          */
         function visitorWorker(node: Node): VisitResult<Node> {
-            if (node.kind === SyntaxKind.SourceFile) {
-                return visitSourceFile(<SourceFile>node);
-            }
-            else if (node.transformFlags & TransformFlags.TypeScript) {
+            if (node.transformFlags & TransformFlags.TypeScript) {
                 // This node is explicitly marked as TypeScript, so we should transform the node.
                 return visitTypeScript(node);
             }
@@ -147,6 +183,35 @@ namespace ts {
             return node;
         }
 
+        /**
+         * Specialized visitor that visits the immediate children of a SourceFile.
+         *
+         * @param node The node to visit.
+         */
+        function sourceElementVisitor(node: Node): VisitResult<Node> {
+            return saveStateAndInvoke(node, sourceElementVisitorWorker);
+        }
+
+        /**
+         * Specialized visitor that visits the immediate children of a SourceFile.
+         *
+         * @param node The node to visit.
+         */
+        function sourceElementVisitorWorker(node: Node): VisitResult<Node> {
+            switch (node.kind) {
+                case SyntaxKind.ImportDeclaration:
+                    return visitImportDeclaration(<ImportDeclaration>node);
+                case SyntaxKind.ImportEqualsDeclaration:
+                    return visitImportEqualsDeclaration(<ImportEqualsDeclaration>node);
+                case SyntaxKind.ExportAssignment:
+                    return visitExportAssignment(<ExportAssignment>node);
+                case SyntaxKind.ExportDeclaration:
+                    return visitExportDeclaration(<ExportDeclaration>node);
+                default:
+                    return visitorWorker(node);
+            }
+        }
+
         /**
          * Specialized visitor that visits the immediate children of a namespace.
          *
@@ -222,6 +287,17 @@ namespace ts {
             }
         }
 
+        function modifierVisitor(node: Node): VisitResult<Node> {
+            if (modifierToFlag(node.kind) & ModifierFlags.TypeScriptModifier) {
+                return undefined;
+            }
+            else if (currentNamespace && node.kind === SyntaxKind.ExportKeyword) {
+                return undefined;
+            }
+
+            return node;
+        }
+
         /**
          * Branching visitor, visits a TypeScript syntax node.
          *
@@ -244,7 +320,6 @@ namespace ts {
                 case SyntaxKind.PrivateKeyword:
                 case SyntaxKind.ProtectedKeyword:
                 case SyntaxKind.AbstractKeyword:
-                case SyntaxKind.AsyncKeyword:
                 case SyntaxKind.ConstKeyword:
                 case SyntaxKind.DeclareKeyword:
                 case SyntaxKind.ReadonlyKeyword:
@@ -270,6 +345,9 @@ namespace ts {
                 case SyntaxKind.IntersectionType:
                 case SyntaxKind.ParenthesizedType:
                 case SyntaxKind.ThisType:
+                case SyntaxKind.TypeOperator:
+                case SyntaxKind.IndexedAccessType:
+                case SyntaxKind.MappedType:
                 case SyntaxKind.LiteralType:
                     // TypeScript type nodes are elided.
 
@@ -285,10 +363,13 @@ namespace ts {
                 case SyntaxKind.PropertyDeclaration:
                     // TypeScript property declarations are elided.
 
-                case SyntaxKind.Constructor:
-                    // TypeScript constructors are transformed in `visitClassDeclaration`.
+                case SyntaxKind.NamespaceExportDeclaration:
+                    // TypeScript namespace export declarations are elided.
                     return undefined;
 
+                case SyntaxKind.Constructor:
+                    return visitConstructor(<ConstructorDeclaration>node);
+
                 case SyntaxKind.InterfaceDeclaration:
                     // TypeScript interfaces are elided, but some comments may be preserved.
                     // See the implementation of `getLeadingComments` in comments.ts for more details.
@@ -304,7 +385,6 @@ namespace ts {
                     // - property declarations
                     // - index signatures
                     // - method overload signatures
-                    // - async methods
                     return visitClassDeclaration(<ClassDeclaration>node);
 
                 case SyntaxKind.ClassExpression:
@@ -317,7 +397,6 @@ namespace ts {
                     // - property declarations
                     // - index signatures
                     // - method overload signatures
-                    // - async methods
                     return visitClassExpression(<ClassExpression>node);
 
                 case SyntaxKind.HeritageClause:
@@ -332,7 +411,7 @@ namespace ts {
                     return visitExpressionWithTypeArguments(<ExpressionWithTypeArguments>node);
 
                 case SyntaxKind.MethodDeclaration:
-                    // TypeScript method declarations may be 'async', and may have decorators, modifiers
+                    // TypeScript method declarations may have decorators, modifiers
                     // or type annotations.
                     return visitMethodDeclaration(<MethodDeclaration>node);
 
@@ -341,19 +420,19 @@ namespace ts {
                     return visitGetAccessor(<GetAccessorDeclaration>node);
 
                 case SyntaxKind.SetAccessor:
-                    // Set Accessors can have TypeScript modifiers, decorators, and type annotations.
+                    // Set Accessors can have TypeScript modifiers and type annotations.
                     return visitSetAccessor(<SetAccessorDeclaration>node);
 
                 case SyntaxKind.FunctionDeclaration:
-                    // TypeScript function declarations may be 'async'
+                    // Typescript function declarations can have modifiers, decorators, and type annotations.
                     return visitFunctionDeclaration(<FunctionDeclaration>node);
 
                 case SyntaxKind.FunctionExpression:
-                    // TypeScript function expressions may be 'async'
+                    // TypeScript function expressions can have modifiers and type annotations.
                     return visitFunctionExpression(<FunctionExpression>node);
 
                 case SyntaxKind.ArrowFunction:
-                    // TypeScript arrow functions may be 'async'
+                    // TypeScript arrow functions can have modifiers and type annotations.
                     return visitArrowFunction(<ArrowFunction>node);
 
                 case SyntaxKind.Parameter:
@@ -377,6 +456,12 @@ namespace ts {
                     // TypeScript type assertions are removed, but their subtrees are preserved.
                     return visitAssertionExpression(<AssertionExpression>node);
 
+                case SyntaxKind.CallExpression:
+                    return visitCallExpression(<CallExpression>node);
+
+                case SyntaxKind.NewExpression:
+                    return visitNewExpression(<NewExpression>node);
+
                 case SyntaxKind.NonNullExpression:
                     // TypeScript non-null expressions are removed, but their subtrees are preserved.
                     return visitNonNullExpression(<NonNullExpression>node);
@@ -385,14 +470,13 @@ namespace ts {
                     // TypeScript enum declarations do not exist in ES6 and must be rewritten.
                     return visitEnumDeclaration(<EnumDeclaration>node);
 
-                case SyntaxKind.AwaitExpression:
-                    // TypeScript 'await' expressions must be transformed.
-                    return visitAwaitExpression(<AwaitExpression>node);
-
                 case SyntaxKind.VariableStatement:
                     // TypeScript namespace exports for variable statements must be transformed.
                     return visitVariableStatement(<VariableStatement>node);
 
+                case SyntaxKind.VariableDeclaration:
+                    return visitVariableDeclaration(<VariableDeclaration>node);
+
                 case SyntaxKind.ModuleDeclaration:
                     // TypeScript namespace declarations must be transformed.
                     return visitModuleDeclaration(<ModuleDeclaration>node);
@@ -407,69 +491,12 @@ namespace ts {
             }
         }
 
-        /**
-         * Performs actions that should always occur immediately before visiting a node.
-         *
-         * @param node The node to visit.
-         */
-        function onBeforeVisitNode(node: Node) {
-            switch (node.kind) {
-                case SyntaxKind.SourceFile:
-                case SyntaxKind.CaseBlock:
-                case SyntaxKind.ModuleBlock:
-                case SyntaxKind.Block:
-                    currentScope = <SourceFile | CaseBlock | ModuleBlock | Block>node;
-                    currentScopeFirstDeclarationsOfName = undefined;
-                    break;
-
-                case SyntaxKind.ClassDeclaration:
-                case SyntaxKind.FunctionDeclaration:
-                    if (hasModifier(node, ModifierFlags.Ambient)) {
-                        break;
-                    }
-
-                    recordEmittedDeclarationInScope(node);
-                    break;
-            }
-        }
-
         function visitSourceFile(node: SourceFile) {
-            currentSourceFile = node;
-
-            // If the source file requires any helpers and is an external module, and
-            // the importHelpers compiler option is enabled, emit a synthesized import
-            // statement for the helpers library.
-            if (node.flags & NodeFlags.EmitHelperFlags
-                && compilerOptions.importHelpers
-                && (isExternalModule(node) || compilerOptions.isolatedModules)) {
-                startLexicalEnvironment();
-                const statements: Statement[] = [];
-                const statementOffset = addPrologueDirectives(statements, node.statements, /*ensureUseStrict*/ false, visitor);
-                const externalHelpersModuleName = createUniqueName(externalHelpersModuleNameText);
-                const externalHelpersModuleImport = createImportDeclaration(
-                    /*decorators*/ undefined,
-                    /*modifiers*/ undefined,
-                    createImportClause(/*name*/ undefined, createNamespaceImport(externalHelpersModuleName)),
-                    createLiteral(externalHelpersModuleNameText)
-                );
-                externalHelpersModuleImport.parent = node;
-                externalHelpersModuleImport.flags &= ~NodeFlags.Synthesized;
-                statements.push(externalHelpersModuleImport);
-
-                currentSourceFileExternalHelpersModuleName = externalHelpersModuleName;
-                addRange(statements, visitNodes(node.statements, visitor, isStatement, statementOffset));
-                addRange(statements, endLexicalEnvironment());
-                currentSourceFileExternalHelpersModuleName = undefined;
-
-                node = updateSourceFileNode(node, createNodeArray(statements, node.statements));
-                node.externalHelpersModuleName = externalHelpersModuleName;
-            }
-            else {
-                node = visitEachChild(node, visitor, context);
-            }
-
-            setEmitFlags(node, EmitFlags.EmitEmitHelpers | getEmitFlags(node));
-            return node;
+            const alwaysStrict = (compilerOptions.alwaysStrict === undefined ? compilerOptions.strict : compilerOptions.alwaysStrict) &&
+                !(isExternalModule(node) && moduleKind === ModuleKind.ES2015);
+            return updateSourceFileNode(
+                node,
+                visitLexicalEnvironment(node.statements, sourceElementVisitor, context, /*start*/ 0, alwaysStrict));
         }
 
         /**
@@ -495,6 +522,19 @@ namespace ts {
             return parameter.decorators !== undefined && parameter.decorators.length > 0;
         }
 
+        function getClassFacts(node: ClassDeclaration, staticProperties: PropertyDeclaration[]) {
+            let facts = ClassFacts.None;
+            if (some(staticProperties)) facts |= ClassFacts.HasStaticInitializedProperties;
+            if (getClassExtendsHeritageClauseElement(node)) facts |= ClassFacts.HasExtendsClause;
+            if (shouldEmitDecorateCallForClass(node)) facts |= ClassFacts.HasConstructorDecorators;
+            if (childIsDecorated(node)) facts |= ClassFacts.HasMemberDecorators;
+            if (isExportOfNamespace(node)) facts |= ClassFacts.IsExportOfNamespace;
+            else if (isDefaultExternalModuleExport(node)) facts |= ClassFacts.IsDefaultExternalExport;
+            else if (isNamedExternalModuleExport(node)) facts |= ClassFacts.IsNamedExternalExport;
+            if (languageVersion <= ScriptTarget.ES5 && (facts & ClassFacts.MayNeedImmediatelyInvokedFunctionExpression)) facts |= ClassFacts.UseImmediatelyInvokedFunctionExpression;
+            return facts;
+        }
+
         /**
          * Transforms a class declaration with TypeScript syntax into compatible ES6.
          *
@@ -508,92 +548,147 @@ namespace ts {
          */
         function visitClassDeclaration(node: ClassDeclaration): VisitResult<Statement> {
             const staticProperties = getInitializedProperties(node, /*isStatic*/ true);
-            const hasExtendsClause = getClassExtendsHeritageClauseElement(node) !== undefined;
-            const isDecoratedClass = shouldEmitDecorateCallForClass(node);
-            let classAlias: Identifier;
+            const facts = getClassFacts(node, staticProperties);
 
-            // emit name if
-            // - node has a name
-            // - node has static initializers
-            //
-            let name = node.name;
-            if (!name && staticProperties.length > 0) {
-                name = getGeneratedNameForNode(node);
+            if (facts & ClassFacts.UseImmediatelyInvokedFunctionExpression) {
+                context.startLexicalEnvironment();
             }
 
-            const statements: Statement[] = [];
-            if (!isDecoratedClass) {
-                //  ${modifiers} class ${name} ${heritageClauses} {
-                //      ${members}
-                //  }
-                const classDeclaration = createClassDeclaration(
-                    /*decorators*/ undefined,
-                    visitNodes(node.modifiers, visitor, isModifier),
-                    name,
-                    /*typeParameters*/ undefined,
-                    visitNodes(node.heritageClauses, visitor, isHeritageClause),
-                    transformClassMembers(node, hasExtendsClause),
-                    /*location*/ node
-                );
-                setOriginalNode(classDeclaration, node);
-
-                // To better align with the old emitter, we should not emit a trailing source map
-                // entry if the class has static properties.
-                if (staticProperties.length > 0) {
-                    setEmitFlags(classDeclaration, EmitFlags.NoTrailingSourceMap | getEmitFlags(classDeclaration));
-                }
+            const name = node.name || (facts & ClassFacts.NeedsName ? getGeneratedNameForNode(node) : undefined);
+            const classStatement = facts & ClassFacts.HasConstructorDecorators
+                ? createClassDeclarationHeadWithDecorators(node, name, facts)
+                : createClassDeclarationHeadWithoutDecorators(node, name, facts);
 
-                statements.push(classDeclaration);
-            }
-            else {
-                classAlias = addClassDeclarationHeadWithDecorators(statements, node, name, hasExtendsClause);
-            }
+            let statements: Statement[] = [classStatement];
 
             // Emit static property assignment. Because classDeclaration is lexically evaluated,
             // it is safe to emit static property assignment after classDeclaration
             // From ES6 specification:
             //      HasLexicalDeclaration (N) : Determines if the argument identifier has a binding in this environment record that was created using
             //                                  a lexical declaration such as a LexicalDeclaration or a ClassDeclaration.
-            if (staticProperties.length) {
-                addInitializedPropertyStatements(statements, node, staticProperties, getLocalName(node, /*noSourceMaps*/ true));
+            if (facts & ClassFacts.HasStaticInitializedProperties) {
+                addInitializedPropertyStatements(statements, staticProperties, facts & ClassFacts.UseImmediatelyInvokedFunctionExpression ? getInternalName(node) : getLocalName(node));
             }
 
             // Write any decorators of the node.
             addClassElementDecorationStatements(statements, node, /*isStatic*/ false);
             addClassElementDecorationStatements(statements, node, /*isStatic*/ true);
-            addConstructorDecorationStatement(statements, node, classAlias);
+            addConstructorDecorationStatement(statements, node);
+
+            if (facts & ClassFacts.UseImmediatelyInvokedFunctionExpression) {
+                // When we emit a TypeScript class down to ES5, we must wrap it in an IIFE so that the
+                // 'es2015' transformer can properly nest static initializers and decorators. The result
+                // looks something like:
+                //
+                //  var C = function () {
+                //      class C {
+                //      }
+                //      C.static_prop = 1;
+                //      return C;
+                //  }();
+                //
+                const closingBraceLocation = createTokenRange(skipTrivia(currentSourceFile.text, node.members.end), SyntaxKind.CloseBraceToken);
+                const localName = getInternalName(node);
+
+                // The following partially-emitted expression exists purely to align our sourcemap
+                // emit with the original emitter.
+                const outer = createPartiallyEmittedExpression(localName);
+                outer.end = closingBraceLocation.end;
+                setEmitFlags(outer, EmitFlags.NoComments);
+
+                const statement = createReturn(outer);
+                statement.pos = closingBraceLocation.pos;
+                setEmitFlags(statement, EmitFlags.NoComments | EmitFlags.NoTokenSourceMaps);
+                statements.push(statement);
+
+                addRange(statements, context.endLexicalEnvironment());
+
+                const varStatement = createVariableStatement(
+                    /*modifiers*/ undefined,
+                    createVariableDeclarationList([
+                        createVariableDeclaration(
+                            getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ false),
+                            /*type*/ undefined,
+                            createImmediatelyInvokedFunctionExpression(statements)
+                        )
+                    ])
+                );
+
+                setOriginalNode(varStatement, node);
+                setCommentRange(varStatement, node);
+                setSourceMapRange(varStatement, moveRangePastDecorators(node));
+                startOnNewLine(varStatement);
+                statements = [varStatement];
+            }
 
             // If the class is exported as part of a TypeScript namespace, emit the namespace export.
             // Otherwise, if the class was exported at the top level and was decorated, emit an export
             // declaration or export default for the class.
-            if (isNamespaceExport(node)) {
+            if (facts & ClassFacts.IsExportOfNamespace) {
                 addExportMemberAssignment(statements, node);
             }
-            else if (isDecoratedClass) {
-                if (isDefaultExternalModuleExport(node)) {
-                    statements.push(createExportAssignment(
-                        /*decorators*/ undefined,
-                        /*modifiers*/ undefined,
-                        /*isExportEquals*/ false,
-                        getLocalName(node)));
+            else if (facts & ClassFacts.UseImmediatelyInvokedFunctionExpression || facts & ClassFacts.HasConstructorDecorators) {
+                if (facts & ClassFacts.IsDefaultExternalExport) {
+                    statements.push(createExportDefault(getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ true)));
                 }
-                else if (isNamedExternalModuleExport(node)) {
-                    statements.push(createExternalModuleExport(name));
+                else if (facts & ClassFacts.IsNamedExternalExport) {
+                    statements.push(createExternalModuleExport(getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ true)));
                 }
             }
 
-            return statements;
+            if (statements.length > 1) {
+                // Add a DeclarationMarker as a marker for the end of the declaration
+                statements.push(createEndOfDeclarationMarker(node));
+                setEmitFlags(classStatement, getEmitFlags(classStatement) | EmitFlags.HasEndOfDeclarationMarker);
+            }
+
+            return singleOrMany(statements);
         }
 
         /**
-         * Transforms a decorated class declaration and appends the resulting statements. If
-         * the class requires an alias to avoid issues with double-binding, the alias is returned.
+         * Transforms a non-decorated class declaration and appends the resulting statements.
          *
          * @param node A ClassDeclaration node.
          * @param name The name of the class.
-         * @param hasExtendsClause A value indicating whether
+         * @param facts Precomputed facts about the class.
+         */
+        function createClassDeclarationHeadWithoutDecorators(node: ClassDeclaration, name: Identifier, facts: ClassFacts) {
+            //  ${modifiers} class ${name} ${heritageClauses} {
+            //      ${members}
+            //  }
+
+            // we do not emit modifiers on the declaration if we are emitting an IIFE
+            const modifiers = !(facts & ClassFacts.UseImmediatelyInvokedFunctionExpression)
+                ? visitNodes(node.modifiers, modifierVisitor, isModifier)
+                : undefined;
+
+            const classDeclaration = createClassDeclaration(
+                /*decorators*/ undefined,
+                modifiers,
+                name,
+                /*typeParameters*/ undefined,
+                visitNodes(node.heritageClauses, visitor, isHeritageClause),
+                transformClassMembers(node, (facts & ClassFacts.HasExtendsClause) !== 0)
+            );
+
+            // To better align with the old emitter, we should not emit a trailing source map
+            // entry if the class has static properties.
+            let emitFlags = getEmitFlags(node);
+            if (facts & ClassFacts.HasStaticInitializedProperties) {
+                emitFlags |= EmitFlags.NoTrailingSourceMap;
+            }
+
+            setTextRange(classDeclaration, node);
+            setOriginalNode(classDeclaration, node);
+            setEmitFlags(classDeclaration, emitFlags);
+            return classDeclaration;
+        }
+
+        /**
+         * Transforms a decorated class declaration and appends the resulting statements. If
+         * the class requires an alias to avoid issues with double-binding, the alias is returned.
          */
-        function addClassDeclarationHeadWithDecorators(statements: Statement[], node: ClassDeclaration, name: Identifier, hasExtendsClause: boolean) {
+        function createClassDeclarationHeadWithDecorators(node: ClassDeclaration, name: Identifier, facts: ClassFacts) {
             // When we emit an ES6 class that has a class decorator, we must tailor the
             // emit to certain specific cases.
             //
@@ -628,20 +723,20 @@ namespace ts {
             //  ---------------------------------------------------------------------
             //  TypeScript                      | Javascript
             //  ---------------------------------------------------------------------
-            //  @dec                            | let C_1 = class C {
+            //  @dec                            | let C = C_1 = class C {
             //  class C {                       |   static x() { return C_1.y; }
             //    static x() { return C.y; }    | }
-            //    static y = 1;                 | let C = C_1;
-            //  }                               | C.y = 1;
-            //                                  | C = C_1 = __decorate([dec], C);
+            //    static y = 1;                 | C.y = 1;
+            //  }                               | C = C_1 = __decorate([dec], C);
+            //                                  | var C_1;
             //  ---------------------------------------------------------------------
-            //  @dec                            | let C_1 = class C {
+            //  @dec                            | let C = class C {
             //  export class C {                |   static x() { return C_1.y; }
             //    static x() { return C.y; }    | }
-            //    static y = 1;                 | let C = C_1;
-            //  }                               | C.y = 1;
-            //                                  | C = C_1 = __decorate([dec], C);
+            //    static y = 1;                 | C.y = 1;
+            //  }                               | C = C_1 = __decorate([dec], C);
             //                                  | export { C };
+            //                                  | var C_1;
             //  ---------------------------------------------------------------------
             //
             // If a class declaration is the default export of a module, we instead emit
@@ -670,92 +765,45 @@ namespace ts {
             //  ---------------------------------------------------------------------
             //  TypeScript                      | Javascript
             //  ---------------------------------------------------------------------
-            //  @dec                            | let C_1 = class C {
+            //  @dec                            | let C = class C {
             //  export default class C {        |   static x() { return C_1.y; }
             //    static x() { return C.y; }    | }
-            //    static y = 1;                 | let C = C_1;
-            //  }                               | C.y = 1;
-            //                                  | C = C_1 = __decorate([dec], C);
+            //    static y = 1;                 | C.y = 1;
+            //  }                               | C = C_1 = __decorate([dec], C);
             //                                  | export default C;
+            //                                  | var C_1;
             //  ---------------------------------------------------------------------
             //
 
             const location = moveRangePastDecorators(node);
+            const classAlias = getClassAliasIfNeeded(node);
+            const declName = getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ true);
 
             //  ... = class ${name} ${heritageClauses} {
             //      ${members}
             //  }
-            const classExpression: Expression = setOriginalNode(
-                createClassExpression(
-                    /*modifiers*/ undefined,
-                    name,
-                    /*typeParameters*/ undefined,
-                    visitNodes(node.heritageClauses, visitor, isHeritageClause),
-                    transformClassMembers(node, hasExtendsClause),
-                    /*location*/ location
-                ),
-                node
-            );
-
-            if (!name) {
-                name = getGeneratedNameForNode(node);
-            }
-
-            // Record an alias to avoid class double-binding.
-            let classAlias: Identifier;
-            if (resolver.getNodeCheckFlags(node) & NodeCheckFlags.ClassWithConstructorReference) {
-                enableSubstitutionForClassAliases();
-                classAlias = createUniqueName(node.name && !isGeneratedIdentifier(node.name) ? node.name.text : "default");
-                classAliases[getOriginalNodeId(node)] = classAlias;
-            }
-
-            const declaredName = getDeclarationName(node, /*allowComments*/ true);
+            const heritageClauses = visitNodes(node.heritageClauses, visitor, isHeritageClause);
+            const members = transformClassMembers(node, (facts & ClassFacts.HasExtendsClause) !== 0);
+            const classExpression = createClassExpression(/*modifiers*/ undefined, name, /*typeParameters*/ undefined, heritageClauses, members);
+            setOriginalNode(classExpression, node);
+            setTextRange(classExpression, location);
 
             //  let ${name} = ${classExpression} where name is either declaredName if the class doesn't contain self-reference
             //                                         or decoratedClassAlias if the class contain self-reference.
-            const transformedClassExpression = createVariableStatement(
+            const statement = createVariableStatement(
                 /*modifiers*/ undefined,
-                createLetDeclarationList([
+                createVariableDeclarationList([
                     createVariableDeclaration(
-                        classAlias || declaredName,
+                        declName,
                         /*type*/ undefined,
-                        classExpression
+                        classAlias ? createAssignment(classAlias, classExpression) : classExpression
                     )
-                ]),
-                /*location*/ location
+                ], NodeFlags.Let)
             );
-            setCommentRange(transformedClassExpression, node);
-            statements.push(
-                setOriginalNode(
-                    /*node*/ transformedClassExpression,
-                    /*original*/ node
-                )
-            );
-
-            if (classAlias) {
-                // We emit the class alias as a `let` declaration here so that it has the same
-                // TDZ as the class.
-
-                // let ${declaredName} = ${decoratedClassAlias}
-                statements.push(
-                    setOriginalNode(
-                        createVariableStatement(
-                            /*modifiers*/ undefined,
-                            createLetDeclarationList([
-                                createVariableDeclaration(
-                                    declaredName,
-                                    /*type*/ undefined,
-                                    classAlias
-                                )
-                            ]),
-                            /*location*/ location
-                        ),
-                        /*original*/ node
-                    )
-                );
-            }
-
-            return classAlias;
+            setOriginalNode(statement, node);
+            setTextRange(statement, location);
+            setCommentRange(statement, node);
+            return statement;
         }
 
         /**
@@ -770,20 +818,19 @@ namespace ts {
         function visitClassExpression(node: ClassExpression): Expression {
             const staticProperties = getInitializedProperties(node, /*isStatic*/ true);
             const heritageClauses = visitNodes(node.heritageClauses, visitor, isHeritageClause);
-            const members = transformClassMembers(node, heritageClauses !== undefined);
+            const members = transformClassMembers(node, some(heritageClauses, c => c.token === SyntaxKind.ExtendsKeyword));
 
-            const classExpression = setOriginalNode(
-                createClassExpression(
-                    /*modifiers*/ undefined,
-                    node.name,
-                    /*typeParameters*/ undefined,
-                    heritageClauses,
-                    members,
-                    /*location*/ node
-                ),
-                node
+            const classExpression = createClassExpression(
+                /*modifiers*/ undefined,
+                node.name,
+                /*typeParameters*/ undefined,
+                heritageClauses,
+                members
             );
 
+            setOriginalNode(classExpression, node);
+            setTextRange(classExpression, node);
+
             if (staticProperties.length > 0) {
                 const expressions: Expression[] = [];
                 const temp = createTempVariable(hoistVariableDeclaration);
@@ -797,7 +844,7 @@ namespace ts {
                 // the body of a class with static initializers.
                 setEmitFlags(classExpression, EmitFlags.Indented | getEmitFlags(classExpression));
                 expressions.push(startOnNewLine(createAssignment(temp, classExpression)));
-                addRange(expressions, generateInitializedPropertyExpressions(node, staticProperties, temp));
+                addRange(expressions, generateInitializedPropertyExpressions(staticProperties, temp));
                 expressions.push(startOnNewLine(temp));
                 return inlineExpressions(expressions);
             }
@@ -819,7 +866,7 @@ namespace ts {
             }
 
             addRange(members, visitNodes(node.members, classElementVisitor, isClassElement));
-            return createNodeArray(members, /*location*/ node.members);
+            return setTextRange(createNodeArray(members), /*location*/ node.members);
         }
 
         /**
@@ -843,19 +890,21 @@ namespace ts {
             }
 
             const parameters = transformConstructorParameters(constructor);
-            const body = transformConstructorBody(node, constructor, hasExtendsClause, parameters);
+            const body = transformConstructorBody(node, constructor, hasExtendsClause);
 
             //  constructor(${parameters}) {
             //      ${body}
             //  }
             return startOnNewLine(
                 setOriginalNode(
-                    createConstructor(
-                        /*decorators*/ undefined,
-                        /*modifiers*/ undefined,
-                        parameters,
-                        body,
-                        /*location*/ constructor || node
+                    setTextRange(
+                        createConstructor(
+                            /*decorators*/ undefined,
+                            /*modifiers*/ undefined,
+                            parameters,
+                            body
+                        ),
+                        constructor || node
                     ),
                     constructor
                 )
@@ -885,9 +934,8 @@ namespace ts {
             // downlevel the '...args' portion less efficiently by naively copying the contents of 'arguments' to an array.
             // Instead, we'll avoid using a rest parameter and spread into the super call as
             // 'super(...arguments)' instead of 'super(...args)', as you can see in "transformConstructorBody".
-            return constructor
-                ? visitNodes(constructor.parameters, visitor, isParameter)
-                : <ParameterDeclaration[]>[];
+            return visitParameterList(constructor && constructor.parameters, visitor, context)
+                || <ParameterDeclaration[]>[];
         }
 
         /**
@@ -897,14 +945,12 @@ namespace ts {
          * @param node The current class.
          * @param constructor The current class constructor.
          * @param hasExtendsClause A value indicating whether the class has an extends clause.
-         * @param parameters The transformed parameters for the constructor.
          */
-        function transformConstructorBody(node: ClassExpression | ClassDeclaration, constructor: ConstructorDeclaration, hasExtendsClause: boolean, parameters: ParameterDeclaration[]) {
-            const statements: Statement[] = [];
+        function transformConstructorBody(node: ClassExpression | ClassDeclaration, constructor: ConstructorDeclaration, hasExtendsClause: boolean) {
+            let statements: Statement[] = [];
             let indexOfFirstStatement = 0;
 
-            // The body of a constructor is a new lexical environment
-            startLexicalEnvironment();
+            resumeLexicalEnvironment();
 
             if (constructor) {
                 indexOfFirstStatement = addPrologueDirectivesAndInitialSuperCall(constructor, statements);
@@ -951,7 +997,7 @@ namespace ts {
             //  }
             //
             const properties = getInitializedProperties(node, /*isStatic*/ false);
-            addInitializedPropertyStatements(statements, node, properties, createThis());
+            addInitializedPropertyStatements(statements, properties, createThis());
 
             if (constructor) {
                 // The class already had a constructor, so we should add the existing statements, skipping the initial super call.
@@ -959,16 +1005,16 @@ namespace ts {
             }
 
             // End the lexical environment.
-            addRange(statements, endLexicalEnvironment());
-            return setMultiLine(
+            statements = mergeLexicalEnvironment(statements, endLexicalEnvironment());
+            return setTextRange(
                 createBlock(
-                    createNodeArray(
-                        statements,
+                    setTextRange(
+                        createNodeArray(statements),
                         /*location*/ constructor ? constructor.body.statements : node.members
                     ),
-                    /*location*/ constructor ? constructor.body : undefined
+                    /*multiLine*/ true
                 ),
-                true
+                /*location*/ constructor ? constructor.body : undefined
             );
         }
 
@@ -982,14 +1028,14 @@ namespace ts {
             if (ctor.body) {
                 const statements = ctor.body.statements;
                 // add prologue directives to the list (if any)
-                const index = addPrologueDirectives(result, statements, /*ensureUseStrict*/ false, visitor);
+                const index = addPrologue(result, statements, /*ensureUseStrict*/ false, visitor);
                 if (index === statements.length) {
                     // list contains nothing but prologue directives (or empty) - exit
                     return index;
                 }
 
                 const statement = statements[index];
-                if (statement.kind === SyntaxKind.ExpressionStatement && isSuperCallExpression((<ExpressionStatement>statement).expression)) {
+                if (statement.kind === SyntaxKind.ExpressionStatement && isSuperCall((<ExpressionStatement>statement).expression)) {
                     result.push(visitNode(statement, visitor, isStatement));
                     return index + 1;
                 }
@@ -1034,16 +1080,20 @@ namespace ts {
             setEmitFlags(localName, EmitFlags.NoComments);
 
             return startOnNewLine(
-                createStatement(
-                    createAssignment(
-                        createPropertyAccess(
-                            createThis(),
-                            propertyName,
-                            /*location*/ node.name
-                        ),
-                        localName
+                setTextRange(
+                    createStatement(
+                        createAssignment(
+                            setTextRange(
+                                createPropertyAccess(
+                                    createThis(),
+                                    propertyName
+                                ),
+                                node.name
+                            ),
+                            localName
+                        )
                     ),
-                    /*location*/ moveRangePos(node, -1)
+                    moveRangePos(node, -1)
                 )
             );
         }
@@ -1091,13 +1141,12 @@ namespace ts {
         /**
          * Generates assignment statements for property initializers.
          *
-         * @param node The class node.
          * @param properties An array of property declarations to transform.
          * @param receiver The receiver on which each property should be assigned.
          */
-        function addInitializedPropertyStatements(statements: Statement[], node: ClassExpression | ClassDeclaration, properties: PropertyDeclaration[], receiver: LeftHandSideExpression) {
+        function addInitializedPropertyStatements(statements: Statement[], properties: PropertyDeclaration[], receiver: LeftHandSideExpression) {
             for (const property of properties) {
-                const statement = createStatement(transformInitializedProperty(node, property, receiver));
+                const statement = createStatement(transformInitializedProperty(property, receiver));
                 setSourceMapRange(statement, moveRangePastModifiers(property));
                 setCommentRange(statement, property);
                 statements.push(statement);
@@ -1107,14 +1156,13 @@ namespace ts {
         /**
          * Generates assignment expressions for property initializers.
          *
-         * @param node The class node.
          * @param properties An array of property declarations to transform.
          * @param receiver The receiver on which each property should be assigned.
          */
-        function generateInitializedPropertyExpressions(node: ClassExpression | ClassDeclaration, properties: PropertyDeclaration[], receiver: LeftHandSideExpression) {
+        function generateInitializedPropertyExpressions(properties: PropertyDeclaration[], receiver: LeftHandSideExpression) {
             const expressions: Expression[] = [];
             for (const property of properties) {
-                const expression = transformInitializedProperty(node, property, receiver);
+                const expression = transformInitializedProperty(property, receiver);
                 expression.startsOnNewLine = true;
                 setSourceMapRange(expression, moveRangePastModifiers(property));
                 setCommentRange(expression, property);
@@ -1127,11 +1175,10 @@ namespace ts {
         /**
          * Transforms a property initializer into an assignment statement.
          *
-         * @param node The class containing the property.
          * @param property The property declaration.
          * @param receiver The object receiving the property assignment.
          */
-        function transformInitializedProperty(node: ClassExpression | ClassDeclaration, property: PropertyDeclaration, receiver: LeftHandSideExpression) {
+        function transformInitializedProperty(property: PropertyDeclaration, receiver: LeftHandSideExpression) {
             const propertyName = visitPropertyNameOfClassElement(property);
             const initializer = visitNode(property.initializer, visitor, isExpression);
             const memberAccess = createMemberAccessForPropertyName(receiver, propertyName, /*location*/ propertyName);
@@ -1269,11 +1316,12 @@ namespace ts {
             }
 
             const { firstAccessor, secondAccessor, setAccessor } = getAllAccessorDeclarations(node.members, accessor);
-            if (accessor !== firstAccessor) {
+            const firstAccessorWithDecorators = firstAccessor.decorators ? firstAccessor : secondAccessor && secondAccessor.decorators ? secondAccessor : undefined;
+            if (!firstAccessorWithDecorators || accessor !== firstAccessorWithDecorators) {
                 return undefined;
             }
 
-            const decorators = firstAccessor.decorators || (secondAccessor && secondAccessor.decorators);
+            const decorators = firstAccessorWithDecorators.decorators;
             const parameters = getDecoratorsOfParameters(setAccessor);
             if (!decorators && !parameters) {
                 return undefined;
@@ -1322,7 +1370,7 @@ namespace ts {
          * @param node The declaration node.
          * @param allDecorators An object containing all of the decorators for the declaration.
          */
-        function transformAllDecoratorsOfDeclaration(node: Declaration, allDecorators: AllDecorators) {
+        function transformAllDecoratorsOfDeclaration(node: Declaration, container: ClassLikeDeclaration, allDecorators: AllDecorators) {
             if (!allDecorators) {
                 return undefined;
             }
@@ -1330,7 +1378,7 @@ namespace ts {
             const decoratorExpressions: Expression[] = [];
             addRange(decoratorExpressions, map(allDecorators.decorators, transformDecorator));
             addRange(decoratorExpressions, flatMap(allDecorators.parameters, transformDecoratorsOfParameter));
-            addTypeMetadata(node, decoratorExpressions);
+            addTypeMetadata(node, container, decoratorExpressions);
             return decoratorExpressions;
         }
 
@@ -1379,7 +1427,7 @@ namespace ts {
          */
         function generateClassElementDecorationExpression(node: ClassExpression | ClassDeclaration, member: ClassElement) {
             const allDecorators = getAllDecoratorsOfClassElement(node, member);
-            const decoratorExpressions = transformAllDecoratorsOfDeclaration(member, allDecorators);
+            const decoratorExpressions = transformAllDecoratorsOfDeclaration(member, node, allDecorators);
             if (!decoratorExpressions) {
                 return undefined;
             }
@@ -1400,13 +1448,13 @@ namespace ts {
             //       __metadata("design:type", Function),
             //       __metadata("design:paramtypes", [Object]),
             //       __metadata("design:returntype", void 0)
-            //   ], C.prototype, "method", undefined);
+            //   ], C.prototype, "method", null);
             //
             // The emit for an accessor is:
             //
             //   __decorate([
             //       dec
-            //   ], C.prototype, "accessor", undefined);
+            //   ], C.prototype, "accessor", null);
             //
             // The emit for a property is:
             //
@@ -1429,7 +1477,7 @@ namespace ts {
                 : undefined;
 
             const helper = createDecorateHelper(
-                currentSourceFileExternalHelpersModuleName,
+                context,
                 decoratorExpressions,
                 prefix,
                 memberName,
@@ -1446,8 +1494,8 @@ namespace ts {
          *
          * @param node The class node.
          */
-        function addConstructorDecorationStatement(statements: Statement[], node: ClassDeclaration, decoratedClassAlias: Identifier) {
-            const expression = generateConstructorDecorationExpression(node, decoratedClassAlias);
+        function addConstructorDecorationStatement(statements: Statement[], node: ClassDeclaration) {
+            const expression = generateConstructorDecorationExpression(node);
             if (expression) {
                 statements.push(setOriginalNode(createStatement(expression), node));
             }
@@ -1458,61 +1506,20 @@ namespace ts {
          *
          * @param node The class node.
          */
-        function generateConstructorDecorationExpression(node: ClassExpression | ClassDeclaration, decoratedClassAlias: Identifier) {
+        function generateConstructorDecorationExpression(node: ClassExpression | ClassDeclaration) {
             const allDecorators = getAllDecoratorsOfConstructor(node);
-            const decoratorExpressions = transformAllDecoratorsOfDeclaration(node, allDecorators);
+            const decoratorExpressions = transformAllDecoratorsOfDeclaration(node, node, allDecorators);
             if (!decoratorExpressions) {
                 return undefined;
             }
 
-            // Emit the call to __decorate. Given the class:
-            //
-            //   @dec
-            //   class C {
-            //   }
-            //
-            // The emit for the class is:
-            //
-            //   C = C_1 = __decorate([dec], C);
-            //
-            if (decoratedClassAlias) {
-                const expression = createAssignment(
-                    decoratedClassAlias,
-                    createDecorateHelper(
-                        currentSourceFileExternalHelpersModuleName,
-                        decoratorExpressions,
-                        getDeclarationName(node)
-                    )
-                );
-
-                const result = createAssignment(getDeclarationName(node), expression, moveRangePastDecorators(node));
-                setEmitFlags(result, EmitFlags.NoComments);
-                return result;
-            }
-            // Emit the call to __decorate. Given the class:
-            //
-            //   @dec
-            //   export declare class C {
-            //   }
-            //
-            // The emit for the class is:
-            //
-            //   C = __decorate([dec], C);
-            //
-            else {
-                const result = createAssignment(
-                    getDeclarationName(node),
-                    createDecorateHelper(
-                        currentSourceFileExternalHelpersModuleName,
-                        decoratorExpressions,
-                        getDeclarationName(node)
-                    ),
-                    moveRangePastDecorators(node)
-                );
-
-                setEmitFlags(result, EmitFlags.NoComments);
-                return result;
-            }
+            const classAlias = classAliases && classAliases[getOriginalNodeId(node)];
+            const localName = getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ true);
+            const decorate = createDecorateHelper(context, decoratorExpressions, localName);
+            const expression = createAssignment(localName, classAlias ? createAssignment(classAlias, decorate) : decorate);
+            setEmitFlags(expression, EmitFlags.NoComments);
+            setSourceMapRange(expression, moveRangePastDecorators(node));
+            return expression;
         }
 
         /**
@@ -1536,7 +1543,7 @@ namespace ts {
                 expressions = [];
                 for (const decorator of decorators) {
                     const helper = createParamHelper(
-                        currentSourceFileExternalHelpersModuleName,
+                        context,
                         transformDecorator(decorator),
                         parameterOffset,
                         /*location*/ decorator.expression);
@@ -1554,43 +1561,43 @@ namespace ts {
          * @param node The declaration node.
          * @param decoratorExpressions The destination array to which to add new decorator expressions.
          */
-        function addTypeMetadata(node: Declaration, decoratorExpressions: Expression[]) {
+        function addTypeMetadata(node: Declaration, container: ClassLikeDeclaration, decoratorExpressions: Expression[]) {
             if (USE_NEW_TYPE_METADATA_FORMAT) {
-                addNewTypeMetadata(node, decoratorExpressions);
+                addNewTypeMetadata(node, container, decoratorExpressions);
             }
             else {
-                addOldTypeMetadata(node, decoratorExpressions);
+                addOldTypeMetadata(node, container, decoratorExpressions);
             }
         }
 
-        function addOldTypeMetadata(node: Declaration, decoratorExpressions: Expression[]) {
+        function addOldTypeMetadata(node: Declaration, container: ClassLikeDeclaration, decoratorExpressions: Expression[]) {
             if (compilerOptions.emitDecoratorMetadata) {
                 if (shouldAddTypeMetadata(node)) {
-                    decoratorExpressions.push(createMetadataHelper(currentSourceFileExternalHelpersModuleName, "design:type", serializeTypeOfNode(node)));
+                    decoratorExpressions.push(createMetadataHelper(context, "design:type", serializeTypeOfNode(node)));
                 }
                 if (shouldAddParamTypesMetadata(node)) {
-                    decoratorExpressions.push(createMetadataHelper(currentSourceFileExternalHelpersModuleName, "design:paramtypes", serializeParameterTypesOfNode(node)));
+                    decoratorExpressions.push(createMetadataHelper(context, "design:paramtypes", serializeParameterTypesOfNode(node, container)));
                 }
                 if (shouldAddReturnTypeMetadata(node)) {
-                    decoratorExpressions.push(createMetadataHelper(currentSourceFileExternalHelpersModuleName, "design:returntype", serializeReturnTypeOfNode(node)));
+                    decoratorExpressions.push(createMetadataHelper(context, "design:returntype", serializeReturnTypeOfNode(node)));
                 }
             }
         }
 
-        function addNewTypeMetadata(node: Declaration, decoratorExpressions: Expression[]) {
+        function addNewTypeMetadata(node: Declaration, container: ClassLikeDeclaration, decoratorExpressions: Expression[]) {
             if (compilerOptions.emitDecoratorMetadata) {
                 let properties: ObjectLiteralElementLike[];
                 if (shouldAddTypeMetadata(node)) {
-                    (properties || (properties = [])).push(createPropertyAssignment("type", createArrowFunction(/*modifiers*/ undefined, /*typeParameters*/ undefined, [], /*type*/ undefined, /*equalsGreaterThanToken*/ undefined, serializeTypeOfNode(node))));
+                    (properties || (properties = [])).push(createPropertyAssignment("type", createArrowFunction(/*modifiers*/ undefined, /*typeParameters*/ undefined, [], /*type*/ undefined, createToken(SyntaxKind.EqualsGreaterThanToken), serializeTypeOfNode(node))));
                 }
                 if (shouldAddParamTypesMetadata(node)) {
-                    (properties || (properties = [])).push(createPropertyAssignment("paramTypes", createArrowFunction(/*modifiers*/ undefined, /*typeParameters*/ undefined, [], /*type*/ undefined, /*equalsGreaterThanToken*/ undefined, serializeParameterTypesOfNode(node))));
+                    (properties || (properties = [])).push(createPropertyAssignment("paramTypes", createArrowFunction(/*modifiers*/ undefined, /*typeParameters*/ undefined, [], /*type*/ undefined, createToken(SyntaxKind.EqualsGreaterThanToken), serializeParameterTypesOfNode(node, container))));
                 }
                 if (shouldAddReturnTypeMetadata(node)) {
-                    (properties || (properties = [])).push(createPropertyAssignment("returnType", createArrowFunction(/*modifiers*/ undefined, /*typeParameters*/ undefined, [], /*type*/ undefined, /*equalsGreaterThanToken*/ undefined, serializeReturnTypeOfNode(node))));
+                    (properties || (properties = [])).push(createPropertyAssignment("returnType", createArrowFunction(/*modifiers*/ undefined, /*typeParameters*/ undefined, [], /*type*/ undefined, createToken(SyntaxKind.EqualsGreaterThanToken), serializeReturnTypeOfNode(node))));
                 }
                 if (properties) {
-                    decoratorExpressions.push(createMetadataHelper(currentSourceFileExternalHelpersModuleName, "design:typeinfo", createObjectLiteral(properties, /*location*/ undefined, /*multiLine*/ true)));
+                    decoratorExpressions.push(createMetadataHelper(context, "design:typeinfo", createObjectLiteral(properties, /*multiLine*/ true)));
                 }
             }
         }
@@ -1629,20 +1636,27 @@ namespace ts {
          * @param node The node to test.
          */
         function shouldAddParamTypesMetadata(node: Declaration): boolean {
-            const kind = node.kind;
-            return kind === SyntaxKind.ClassDeclaration
-                || kind === SyntaxKind.ClassExpression
-                || kind === SyntaxKind.MethodDeclaration
-                || kind === SyntaxKind.GetAccessor
-                || kind === SyntaxKind.SetAccessor;
+            switch (node.kind) {
+                case SyntaxKind.ClassDeclaration:
+                case SyntaxKind.ClassExpression:
+                    return getFirstConstructorWithBody(<ClassLikeDeclaration>node) !== undefined;
+                case SyntaxKind.MethodDeclaration:
+                case SyntaxKind.GetAccessor:
+                case SyntaxKind.SetAccessor:
+                    return true;
+            }
+            return false;
         }
 
+        type SerializedEntityNameAsExpression = Identifier | BinaryExpression | PropertyAccessExpression;
+        type SerializedTypeNode = SerializedEntityNameAsExpression | VoidExpression | ConditionalExpression;
+
         /**
          * Serializes the type of a node for use with decorator type metadata.
          *
          * @param node The node that should have its type serialized.
          */
-        function serializeTypeOfNode(node: Node): Expression {
+        function serializeTypeOfNode(node: Node): SerializedTypeNode {
             switch (node.kind) {
                 case SyntaxKind.PropertyDeclaration:
                 case SyntaxKind.Parameter:
@@ -1659,30 +1673,12 @@ namespace ts {
             }
         }
 
-        /**
-         * Gets the most likely element type for a TypeNode. This is not an exhaustive test
-         * as it assumes a rest argument can only be an array type (either T[], or Array<T>).
-         *
-         * @param node The type node.
-         */
-        function getRestParameterElementType(node: TypeNode) {
-            if (node && node.kind === SyntaxKind.ArrayType) {
-                return (<ArrayTypeNode>node).elementType;
-            }
-            else if (node && node.kind === SyntaxKind.TypeReference) {
-                return singleOrUndefined((<TypeReferenceNode>node).typeArguments);
-            }
-            else {
-                return undefined;
-            }
-        }
-
         /**
          * Serializes the types of the parameters of a node for use with decorator type metadata.
          *
          * @param node The node that should have its parameter types serialized.
          */
-        function serializeParameterTypesOfNode(node: Node): Expression {
+        function serializeParameterTypesOfNode(node: Node, container: ClassLikeDeclaration): ArrayLiteralExpression {
             const valueDeclaration =
                 isClassLike(node)
                     ? getFirstConstructorWithBody(node)
@@ -1690,9 +1686,9 @@ namespace ts {
                         ? node
                         : undefined;
 
-            const expressions: Expression[] = [];
+            const expressions: SerializedTypeNode[] = [];
             if (valueDeclaration) {
-                const parameters = valueDeclaration.parameters;
+                const parameters = getParametersOfDecoratedDeclaration(valueDeclaration, container);
                 const numParameters = parameters.length;
                 for (let i = 0; i < numParameters; i++) {
                     const parameter = parameters[i];
@@ -1711,16 +1707,26 @@ namespace ts {
             return createArrayLiteral(expressions);
         }
 
+        function getParametersOfDecoratedDeclaration(node: FunctionLikeDeclaration, container: ClassLikeDeclaration) {
+            if (container && node.kind === SyntaxKind.GetAccessor) {
+                const { setAccessor } = getAllAccessorDeclarations(container.members, <AccessorDeclaration>node);
+                if (setAccessor) {
+                    return setAccessor.parameters;
+                }
+            }
+            return node.parameters;
+        }
+
         /**
          * Serializes the return type of a node for use with decorator type metadata.
          *
          * @param node The node that should have its return type serialized.
          */
-        function serializeReturnTypeOfNode(node: Node): Expression {
+        function serializeReturnTypeOfNode(node: Node): SerializedTypeNode {
             if (isFunctionLike(node) && node.type) {
                 return serializeTypeNode(node.type);
             }
-            else if (isAsyncFunctionLike(node)) {
+            else if (isAsyncFunction(node)) {
                 return createIdentifier("Promise");
             }
 
@@ -1745,13 +1751,16 @@ namespace ts {
          *
          * @param node The type node to serialize.
          */
-        function serializeTypeNode(node: TypeNode): Expression {
+        function serializeTypeNode(node: TypeNode): SerializedTypeNode {
             if (node === undefined) {
                 return createIdentifier("Object");
             }
 
             switch (node.kind) {
                 case SyntaxKind.VoidKeyword:
+                case SyntaxKind.UndefinedKeyword:
+                case SyntaxKind.NullKeyword:
+                case SyntaxKind.NeverKeyword:
                     return createVoidZero();
 
                 case SyntaxKind.ParenthesizedType:
@@ -1772,6 +1781,9 @@ namespace ts {
                 case SyntaxKind.StringKeyword:
                     return createIdentifier("String");
 
+                case SyntaxKind.ObjectKeyword:
+                    return createIdentifier("Object");
+
                 case SyntaxKind.LiteralType:
                     switch ((<LiteralTypeNode>node).literal.kind) {
                         case SyntaxKind.StringLiteral:
@@ -1794,17 +1806,22 @@ namespace ts {
                     return createIdentifier("Number");
 
                 case SyntaxKind.SymbolKeyword:
-                    return languageVersion < ScriptTarget.ES6
+                    return languageVersion < ScriptTarget.ES2015
                         ? getGlobalSymbolNameWithFallback()
                         : createIdentifier("Symbol");
 
                 case SyntaxKind.TypeReference:
                     return serializeTypeReferenceNode(<TypeReferenceNode>node);
 
+                case SyntaxKind.IntersectionType:
+                case SyntaxKind.UnionType:
+                    return serializeUnionOrIntersectionType(<UnionOrIntersectionTypeNode>node);
+
                 case SyntaxKind.TypeQuery:
+                case SyntaxKind.TypeOperator:
+                case SyntaxKind.IndexedAccessType:
+                case SyntaxKind.MappedType:
                 case SyntaxKind.TypeLiteral:
-                case SyntaxKind.UnionType:
-                case SyntaxKind.IntersectionType:
                 case SyntaxKind.AnyKeyword:
                 case SyntaxKind.ThisType:
                     break;
@@ -1817,25 +1834,51 @@ namespace ts {
             return createIdentifier("Object");
         }
 
+        function serializeUnionOrIntersectionType(node: UnionOrIntersectionTypeNode): SerializedTypeNode {
+            // Note when updating logic here also update getEntityNameForDecoratorMetadata
+            // so that aliases can be marked as referenced
+            let serializedUnion: SerializedTypeNode;
+            for (const typeNode of node.types) {
+                const serializedIndividual = serializeTypeNode(typeNode);
+
+                if (isIdentifier(serializedIndividual) && serializedIndividual.text === "Object") {
+                    // One of the individual is global object, return immediately
+                    return serializedIndividual;
+                }
+                // If there exists union that is not void 0 expression, check if the the common type is identifier.
+                // anything more complex and we will just default to Object
+                else if (serializedUnion) {
+                    // Different types
+                    if (!isIdentifier(serializedUnion) ||
+                        !isIdentifier(serializedIndividual) ||
+                        serializedUnion.text !== serializedIndividual.text) {
+                        return createIdentifier("Object");
+                    }
+                }
+                else {
+                    // Initialize the union type
+                    serializedUnion = serializedIndividual;
+                }
+            }
+
+            // If we were able to find common type, use it
+            return serializedUnion;
+        }
+
         /**
          * Serializes a TypeReferenceNode to an appropriate JS constructor value for use with
          * decorator type metadata.
          *
          * @param node The type reference node.
          */
-        function serializeTypeReferenceNode(node: TypeReferenceNode) {
+        function serializeTypeReferenceNode(node: TypeReferenceNode): SerializedTypeNode {
             switch (resolver.getTypeReferenceSerializationKind(node.typeName, currentScope)) {
                 case TypeReferenceSerializationKind.Unknown:
                     const serialized = serializeEntityNameAsExpression(node.typeName, /*useFallback*/ true);
                     const temp = createTempVariable(hoistVariableDeclaration);
                     return createLogicalOr(
                         createLogicalAnd(
-                            createStrictEquality(
-                                createTypeOf(
-                                    createAssignment(temp, serialized)
-                                ),
-                                createLiteral("function")
-                            ),
+                            createTypeCheck(createAssignment(temp, serialized), "function"),
                             temp
                         ),
                         createIdentifier("Object")
@@ -1860,7 +1903,7 @@ namespace ts {
                     return createIdentifier("Array");
 
                 case TypeReferenceSerializationKind.ESSymbolType:
-                    return languageVersion < ScriptTarget.ES6
+                    return languageVersion < ScriptTarget.ES2015
                         ? getGlobalSymbolNameWithFallback()
                         : createIdentifier("Symbol");
 
@@ -1883,7 +1926,7 @@ namespace ts {
          * @param useFallback A value indicating whether to use logical operators to test for the
          *                    entity name at runtime.
          */
-        function serializeEntityNameAsExpression(node: EntityName, useFallback: boolean): Expression {
+        function serializeEntityNameAsExpression(node: EntityName, useFallback: boolean): SerializedEntityNameAsExpression {
             switch (node.kind) {
                 case SyntaxKind.Identifier:
                     // Create a clone of the name with a new parent, and treat it as if it were
@@ -1916,8 +1959,8 @@ namespace ts {
          * @param useFallback A value indicating whether to use logical operators to test for the
          *                    qualified name at runtime.
          */
-        function serializeQualifiedNameAsExpression(node: QualifiedName, useFallback: boolean): Expression {
-            let left: Expression;
+        function serializeQualifiedNameAsExpression(node: QualifiedName, useFallback: boolean): PropertyAccessExpression {
+            let left: SerializedEntityNameAsExpression;
             if (node.left.kind === SyntaxKind.Identifier) {
                 left = serializeEntityNameAsExpression(node.left, useFallback);
             }
@@ -1942,15 +1985,10 @@ namespace ts {
          * Gets an expression that points to the global "Symbol" constructor at runtime if it is
          * available.
          */
-        function getGlobalSymbolNameWithFallback(): Expression {
+        function getGlobalSymbolNameWithFallback(): ConditionalExpression {
             return createConditional(
-                createStrictEquality(
-                    createTypeOf(createIdentifier("Symbol")),
-                    createLiteral("function")
-                ),
-                createToken(SyntaxKind.QuestionToken),
+                createTypeCheck(createIdentifier("Symbol"), "function"),
                 createIdentifier("Symbol"),
-                createToken(SyntaxKind.ColonToken),
                 createIdentifier("Object")
             );
         }
@@ -1969,7 +2007,7 @@ namespace ts {
                     : (<ComputedPropertyName>name).expression;
             }
             else if (isIdentifier(name)) {
-                return createLiteral(name.text);
+                return createLiteral(unescapeIdentifier(name.text));
             }
             else {
                 return getSynthesizedClone(name);
@@ -1993,10 +2031,7 @@ namespace ts {
                     expression = createAssignment(generatedName, expression);
                 }
 
-                return setOriginalNode(
-                    createComputedPropertyName(expression, /*location*/ name),
-                    name
-                );
+                return updateComputedPropertyName(name, expression);
             }
             else {
                 return name;
@@ -2015,9 +2050,11 @@ namespace ts {
         function visitHeritageClause(node: HeritageClause): HeritageClause {
             if (node.token === SyntaxKind.ExtendsKeyword) {
                 const types = visitNodes(node.types, visitor, isExpressionWithTypeArguments, 0, 1);
-                return createHeritageClause(
-                    SyntaxKind.ExtendsKeyword,
-                    types,
+                return setTextRange(
+                    createHeritageClause(
+                        SyntaxKind.ExtendsKeyword,
+                        types
+                    ),
                     node
                 );
             }
@@ -2034,11 +2071,10 @@ namespace ts {
          * @param node The ExpressionWithTypeArguments to transform.
          */
         function visitExpressionWithTypeArguments(node: ExpressionWithTypeArguments): ExpressionWithTypeArguments {
-            const expression = visitNode(node.expression, visitor, isLeftHandSideExpression);
-            return createExpressionWithTypeArguments(
+            return updateExpressionWithTypeArguments(
+                node,
                 /*typeArguments*/ undefined,
-                expression,
-                node
+                visitNode(node.expression, visitor, isLeftHandSideExpression)
             );
         }
 
@@ -2052,12 +2088,26 @@ namespace ts {
             return !nodeIsMissing(node.body);
         }
 
+        function visitConstructor(node: ConstructorDeclaration) {
+            if (!shouldEmitFunctionLikeDeclaration(node)) {
+                return undefined;
+            }
+
+            return updateConstructor(
+                node,
+                visitNodes(node.decorators, visitor, isDecorator),
+                visitNodes(node.modifiers, visitor, isModifier),
+                visitParameterList(node.parameters, visitor, context),
+                visitFunctionBody(node.body, visitor, context)
+            );
+        }
+
         /**
          * Visits a method declaration of a class.
          *
          * This function will be called when one of the following conditions are met:
          * - The node is an overload
-         * - The node is marked as abstract, async, public, private, protected, or readonly
+         * - The node is marked as abstract, public, private, protected, or readonly
          * - The node has both a decorator and a computed property name
          *
          * @param node The method node.
@@ -2066,26 +2116,25 @@ namespace ts {
             if (!shouldEmitFunctionLikeDeclaration(node)) {
                 return undefined;
             }
-
-            const method = createMethod(
+            const updated = updateMethod(
+                node,
                 /*decorators*/ undefined,
-                visitNodes(node.modifiers, visitor, isModifier),
+                visitNodes(node.modifiers, modifierVisitor, isModifier),
                 node.asteriskToken,
                 visitPropertyNameOfClassElement(node),
+                /*questionToken*/ undefined,
                 /*typeParameters*/ undefined,
-                visitNodes(node.parameters, visitor, isParameter),
+                visitParameterList(node.parameters, visitor, context),
                 /*type*/ undefined,
-                transformFunctionBody(node),
-                /*location*/ node
+                visitFunctionBody(node.body, visitor, context)
             );
-
-            // While we emit the source map for the node after skipping decorators and modifiers,
-            // we need to emit the comments for the original range.
-            setCommentRange(method, node);
-            setSourceMapRange(method, moveRangePastDecorators(node));
-            setOriginalNode(method, node);
-
-            return method;
+            if (updated !== node) {
+                // While we emit the source map for the node after skipping decorators and modifiers,
+                // we need to emit the comments for the original range.
+                setCommentRange(updated, node);
+                setSourceMapRange(updated, moveRangePastDecorators(node));
+            }
+            return updated;
         }
 
         /**
@@ -2111,24 +2160,22 @@ namespace ts {
             if (!shouldEmitAccessorDeclaration(node)) {
                 return undefined;
             }
-
-            const accessor = createGetAccessor(
+            const updated = updateGetAccessor(
+                node,
                 /*decorators*/ undefined,
-                visitNodes(node.modifiers, visitor, isModifier),
+                visitNodes(node.modifiers, modifierVisitor, isModifier),
                 visitPropertyNameOfClassElement(node),
-                visitNodes(node.parameters, visitor, isParameter),
+                visitParameterList(node.parameters, visitor, context),
                 /*type*/ undefined,
-                node.body ? visitEachChild(node.body, visitor, context) : createBlock([]),
-                /*location*/ node
+                visitFunctionBody(node.body, visitor, context) || createBlock([])
             );
-
-            // While we emit the source map for the node after skipping decorators and modifiers,
-            // we need to emit the comments for the original range.
-            setCommentRange(accessor, node);
-            setSourceMapRange(accessor, moveRangePastDecorators(node));
-            setOriginalNode(accessor, node);
-
-            return accessor;
+            if (updated !== node) {
+                // While we emit the source map for the node after skipping decorators and modifiers,
+                // we need to emit the comments for the original range.
+                setCommentRange(updated, node);
+                setSourceMapRange(updated, moveRangePastDecorators(node));
+            }
+            return updated;
         }
 
         /**
@@ -2144,23 +2191,21 @@ namespace ts {
             if (!shouldEmitAccessorDeclaration(node)) {
                 return undefined;
             }
-
-            const accessor = createSetAccessor(
+            const updated = updateSetAccessor(
+                node,
                 /*decorators*/ undefined,
-                visitNodes(node.modifiers, visitor, isModifier),
+                visitNodes(node.modifiers, modifierVisitor, isModifier),
                 visitPropertyNameOfClassElement(node),
-                visitNodes(node.parameters, visitor, isParameter),
-                node.body ? visitEachChild(node.body, visitor, context) : createBlock([]),
-                /*location*/ node
+                visitParameterList(node.parameters, visitor, context),
+                visitFunctionBody(node.body, visitor, context) || createBlock([])
             );
-
-            // While we emit the source map for the node after skipping decorators and modifiers,
-            // we need to emit the comments for the original range.
-            setCommentRange(accessor, node);
-            setSourceMapRange(accessor, moveRangePastDecorators(node));
-            setOriginalNode(accessor, node);
-
-            return accessor;
+            if (updated !== node) {
+                // While we emit the source map for the node after skipping decorators and modifiers,
+                // we need to emit the comments for the original range.
+                setCommentRange(updated, node);
+                setSourceMapRange(updated, moveRangePastDecorators(node));
+            }
+            return updated;
         }
 
         /**
@@ -2168,8 +2213,8 @@ namespace ts {
          *
          * This function will be called when one of the following conditions are met:
          * - The node is an overload
-         * - The node is marked async
          * - The node is exported from a TypeScript namespace
+         * - The node has decorators
          *
          * @param node The function node.
          */
@@ -2177,190 +2222,65 @@ namespace ts {
             if (!shouldEmitFunctionLikeDeclaration(node)) {
                 return createNotEmittedStatement(node);
             }
-
-            const func = createFunctionDeclaration(
+            const updated = updateFunctionDeclaration(
+                node,
                 /*decorators*/ undefined,
-                visitNodes(node.modifiers, visitor, isModifier),
+                visitNodes(node.modifiers, modifierVisitor, isModifier),
                 node.asteriskToken,
                 node.name,
                 /*typeParameters*/ undefined,
-                visitNodes(node.parameters, visitor, isParameter),
+                visitParameterList(node.parameters, visitor, context),
                 /*type*/ undefined,
-                transformFunctionBody(node),
-                /*location*/ node
+                visitFunctionBody(node.body, visitor, context) || createBlock([])
             );
-            setOriginalNode(func, node);
-
-            if (isNamespaceExport(node)) {
-                const statements: Statement[] = [func];
+            if (isExportOfNamespace(node)) {
+                const statements: Statement[] = [updated];
                 addExportMemberAssignment(statements, node);
                 return statements;
             }
-
-            return func;
+            return updated;
         }
 
         /**
          * Visits a function expression node.
          *
          * This function will be called when one of the following conditions are met:
-         * - The node is marked async
+         * - The node has type annotations
          *
          * @param node The function expression node.
          */
         function visitFunctionExpression(node: FunctionExpression): Expression {
-            if (nodeIsMissing(node.body)) {
+            if (!shouldEmitFunctionLikeDeclaration(node)) {
                 return createOmittedExpression();
             }
-
-            const func = createFunctionExpression(
+            const updated = updateFunctionExpression(
+                node,
+                visitNodes(node.modifiers, modifierVisitor, isModifier),
                 node.asteriskToken,
                 node.name,
                 /*typeParameters*/ undefined,
-                visitNodes(node.parameters, visitor, isParameter),
+                visitParameterList(node.parameters, visitor, context),
                 /*type*/ undefined,
-                transformFunctionBody(node),
-                /*location*/ node
+                visitFunctionBody(node.body, visitor, context) || createBlock([])
             );
-
-            setOriginalNode(func, node);
-
-            return func;
+            return updated;
         }
 
         /**
          * @remarks
          * This function will be called when one of the following conditions are met:
-         * - The node is marked async
+         * - The node has type annotations
          */
         function visitArrowFunction(node: ArrowFunction) {
-            const func = createArrowFunction(
-                /*modifiers*/ undefined,
+            const updated = updateArrowFunction(
+                node,
+                visitNodes(node.modifiers, modifierVisitor, isModifier),
                 /*typeParameters*/ undefined,
-                visitNodes(node.parameters, visitor, isParameter),
+                visitParameterList(node.parameters, visitor, context),
                 /*type*/ undefined,
-                node.equalsGreaterThanToken,
-                transformConciseBody(node),
-                /*location*/ node
+                visitFunctionBody(node.body, visitor, context)
             );
-
-            setOriginalNode(func, node);
-
-            return func;
-        }
-
-        function transformFunctionBody(node: MethodDeclaration | AccessorDeclaration | FunctionDeclaration | FunctionExpression): FunctionBody {
-            if (isAsyncFunctionLike(node)) {
-                return <FunctionBody>transformAsyncFunctionBody(node);
-            }
-
-            return transformFunctionBodyWorker(node.body);
-        }
-
-        function transformFunctionBodyWorker(body: Block, start = 0) {
-            const savedCurrentScope = currentScope;
-            currentScope = body;
-            startLexicalEnvironment();
-
-            const statements = visitNodes(body.statements, visitor, isStatement, start);
-            const visited = updateBlock(body, statements);
-            const declarations = endLexicalEnvironment();
-            currentScope = savedCurrentScope;
-            return mergeFunctionBodyLexicalEnvironment(visited, declarations);
-        }
-
-        function transformConciseBody(node: ArrowFunction): ConciseBody {
-            if (isAsyncFunctionLike(node)) {
-                return transformAsyncFunctionBody(node);
-            }
-
-            return transformConciseBodyWorker(node.body, /*forceBlockFunctionBody*/ false);
-        }
-
-        function transformConciseBodyWorker(body: Block | Expression, forceBlockFunctionBody: boolean) {
-            if (isBlock(body)) {
-                return transformFunctionBodyWorker(body);
-            }
-            else {
-                startLexicalEnvironment();
-                const visited: Expression | Block = visitNode(body, visitor, isConciseBody);
-                const declarations = endLexicalEnvironment();
-                const merged = mergeFunctionBodyLexicalEnvironment(visited, declarations);
-                if (forceBlockFunctionBody && !isBlock(merged)) {
-                    return createBlock([
-                        createReturn(<Expression>merged)
-                    ]);
-                }
-                else {
-                    return merged;
-                }
-            }
-        }
-
-        function getPromiseConstructor(type: TypeNode) {
-            const typeName = getEntityNameFromTypeNode(type);
-            if (typeName && isEntityName(typeName)) {
-                const serializationKind = resolver.getTypeReferenceSerializationKind(typeName);
-                if (serializationKind === TypeReferenceSerializationKind.TypeWithConstructSignatureAndValue
-                    || serializationKind === TypeReferenceSerializationKind.Unknown) {
-                    return typeName;
-                }
-            }
-
-            return undefined;
-        }
-
-        function transformAsyncFunctionBody(node: FunctionLikeDeclaration): ConciseBody | FunctionBody {
-            const promiseConstructor = languageVersion < ScriptTarget.ES6 ? getPromiseConstructor(node.type) : undefined;
-            const isArrowFunction = node.kind === SyntaxKind.ArrowFunction;
-            const hasLexicalArguments = (resolver.getNodeCheckFlags(node) & NodeCheckFlags.CaptureArguments) !== 0;
-
-            // An async function is emit as an outer function that calls an inner
-            // generator function. To preserve lexical bindings, we pass the current
-            // `this` and `arguments` objects to `__awaiter`. The generator function
-            // passed to `__awaiter` is executed inside of the callback to the
-            // promise constructor.
-
-
-            if (!isArrowFunction) {
-                const statements: Statement[] = [];
-                const statementOffset = addPrologueDirectives(statements, (<Block>node.body).statements, /*ensureUseStrict*/ false, visitor);
-                statements.push(
-                    createReturn(
-                        createAwaiterHelper(
-                            currentSourceFileExternalHelpersModuleName,
-                            hasLexicalArguments,
-                            promiseConstructor,
-                            transformFunctionBodyWorker(<Block>node.body, statementOffset)
-                        )
-                    )
-                );
-
-                const block = createBlock(statements, /*location*/ node.body, /*multiLine*/ true);
-
-                // Minor optimization, emit `_super` helper to capture `super` access in an arrow.
-                // This step isn't needed if we eventually transform this to ES5.
-                if (languageVersion >= ScriptTarget.ES6) {
-                    if (resolver.getNodeCheckFlags(node) & NodeCheckFlags.AsyncMethodWithSuperBinding) {
-                        enableSubstitutionForAsyncMethodsWithSuper();
-                        setEmitFlags(block, EmitFlags.EmitAdvancedSuperHelper);
-                    }
-                    else if (resolver.getNodeCheckFlags(node) & NodeCheckFlags.AsyncMethodWithSuper) {
-                        enableSubstitutionForAsyncMethodsWithSuper();
-                        setEmitFlags(block, EmitFlags.EmitSuperHelper);
-                    }
-                }
-
-                return block;
-            }
-            else {
-                return createAwaiterHelper(
-                    currentSourceFileExternalHelpersModuleName,
-                    hasLexicalArguments,
-                    promiseConstructor,
-                    <Block>transformConciseBodyWorker(node.body, /*forceBlockFunctionBody*/ true)
-                );
-            }
+            return updated;
         }
 
         /**
@@ -2374,24 +2294,24 @@ namespace ts {
          * @param node The parameter declaration node.
          */
         function visitParameter(node: ParameterDeclaration) {
-            if (node.name && isIdentifier(node.name) && node.name.originalKeywordKind === SyntaxKind.ThisKeyword) {
+            if (parameterIsThisKeyword(node)) {
                 return undefined;
             }
 
-            const parameter = createParameterDeclaration(
+            const parameter = createParameter(
                 /*decorators*/ undefined,
                 /*modifiers*/ undefined,
                 node.dotDotDotToken,
                 visitNode(node.name, visitor, isBindingName),
                 /*questionToken*/ undefined,
                 /*type*/ undefined,
-                visitNode(node.initializer, visitor, isExpression),
-                /*location*/ moveRangePastModifiers(node)
+                visitNode(node.initializer, visitor, isExpression)
             );
 
             // While we emit the source map for the node after skipping decorators and modifiers,
             // we need to emit the comments for the original range.
             setOriginalNode(parameter, node);
+            setTextRange(parameter, moveRangePastModifiers(node));
             setCommentRange(parameter, node);
             setSourceMapRange(parameter, moveRangePastModifiers(node));
             setEmitFlags(parameter.name, EmitFlags.NoTrailingSourceMap);
@@ -2406,18 +2326,20 @@ namespace ts {
          * - The node is exported from a TypeScript namespace.
          */
         function visitVariableStatement(node: VariableStatement): Statement {
-            if (isNamespaceExport(node)) {
+            if (isExportOfNamespace(node)) {
                 const variables = getInitializedVariables(node.declarationList);
                 if (variables.length === 0) {
                     // elide statement if there are no initialized variables.
                     return undefined;
                 }
 
-                return createStatement(
-                    inlineExpressions(
-                        map(variables, transformInitializedVariable)
+                return setTextRange(
+                    createStatement(
+                        inlineExpressions(
+                            map(variables, transformInitializedVariable)
+                        )
                     ),
-                    /*location*/ node
+                    node
                 );
             }
             else {
@@ -2428,39 +2350,32 @@ namespace ts {
         function transformInitializedVariable(node: VariableDeclaration): Expression {
             const name = node.name;
             if (isBindingPattern(name)) {
-                return flattenVariableDestructuringToExpression(
-                    context,
+                return flattenDestructuringAssignment(
                     node,
-                    hoistVariableDeclaration,
-                    getNamespaceMemberNameWithSourceMapsAndWithoutComments,
-                    visitor
+                    visitor,
+                    context,
+                    FlattenLevel.All,
+                    /*needsValue*/ false,
+                    createNamespaceExportExpression
                 );
             }
             else {
-                return createAssignment(
-                    getNamespaceMemberNameWithSourceMapsAndWithoutComments(name),
-                    visitNode(node.initializer, visitor, isExpression),
+                return setTextRange(
+                    createAssignment(
+                        getNamespaceMemberNameWithSourceMapsAndWithoutComments(name),
+                        visitNode(node.initializer, visitor, isExpression)
+                    ),
                     /*location*/ node
                 );
             }
         }
 
-        /**
-         * Visits an await expression.
-         *
-         * This function will be called any time a TypeScript await expression is encountered.
-         *
-         * @param node The await expression node.
-         */
-        function visitAwaitExpression(node: AwaitExpression): Expression {
-            return setOriginalNode(
-                createYield(
-                    /*asteriskToken*/ undefined,
-                    visitNode(node.expression, visitor, isExpression),
-                    /*location*/ node
-                ),
-                node
-            );
+        function visitVariableDeclaration(node: VariableDeclaration) {
+            return updateVariableDeclaration(
+                node,
+                visitNode(node.name, visitor, isBindingName),
+                /*type*/ undefined,
+                visitNode(node.initializer, visitor, isExpression));
         }
 
         /**
@@ -2482,13 +2397,13 @@ namespace ts {
                 // code if the casted expression has a lower precedence than the rest of the
                 // expression.
                 //
+                // To preserve comments, we return a "PartiallyEmittedExpression" here which will
+                // preserve the position information of the original expression.
+                //
                 // Due to the auto-parenthesization rules used by the visitor and factory functions
                 // we can safely elide the parentheses here, as a new synthetic
                 // ParenthesizedExpression will be inserted if we remove parentheses too
                 // aggressively.
-                //
-                // To preserve comments, we return a "PartiallyEmittedExpression" here which will
-                // preserve the position information of the original expression.
                 return createPartiallyEmittedExpression(expression, node);
             }
 
@@ -2505,6 +2420,22 @@ namespace ts {
             return createPartiallyEmittedExpression(expression, node);
         }
 
+        function visitCallExpression(node: CallExpression) {
+            return updateCall(
+                node,
+                visitNode(node.expression, visitor, isExpression),
+                /*typeArguments*/ undefined,
+                visitNodes(node.arguments, visitor, isExpression));
+        }
+
+        function visitNewExpression(node: NewExpression) {
+            return updateNew(
+                node,
+                visitNode(node.expression, visitor, isExpression),
+                /*typeArguments*/ undefined,
+                visitNodes(node.arguments, visitor, isExpression));
+        }
+
         /**
          * Determines whether to emit an enum declaration.
          *
@@ -2516,29 +2447,6 @@ namespace ts {
                 || compilerOptions.isolatedModules;
         }
 
-        function shouldEmitVarForEnumDeclaration(node: EnumDeclaration | ModuleDeclaration) {
-            return isFirstEmittedDeclarationInScope(node)
-                && (!hasModifier(node, ModifierFlags.Export)
-                    || isES6ExportedDeclaration(node));
-        }
-
-
-        /*
-         * Adds a trailing VariableStatement for an enum or module declaration.
-         */
-        function addVarForEnumExportedFromNamespace(statements: Statement[], node: EnumDeclaration | ModuleDeclaration) {
-            const statement = createVariableStatement(
-                /*modifiers*/ undefined,
-                [createVariableDeclaration(
-                    getDeclarationName(node),
-                    /*type*/ undefined,
-                    getExportName(node)
-                )]
-            );
-            setSourceMapRange(statement, node);
-            statements.push(statement);
-        }
-
         /**
          * Visits an enum declaration.
          *
@@ -2560,10 +2468,7 @@ namespace ts {
             // If needed, we should emit a variable declaration for the enum. If we emit
             // a leading variable declaration, we should not emit leading comments for the
             // enum body.
-            recordEmittedDeclarationInScope(node);
-            if (shouldEmitVarForEnumDeclaration(node)) {
-                addVarForEnumOrModuleDeclaration(statements, node);
-
+            if (addVarForEnumOrModuleDeclaration(statements, node)) {
                 // We should still emit the comments if we are emitting a system module.
                 if (moduleKind !== ModuleKind.System || currentScope !== currentSourceFile) {
                     emitFlags |= EmitFlags.NoLeadingComments;
@@ -2577,7 +2482,28 @@ namespace ts {
             const containerName = getNamespaceContainerName(node);
 
             // `exportName` is the expression used within this node's container for any exported references.
-            const exportName = getExportName(node);
+            const exportName = hasModifier(node, ModifierFlags.Export)
+                ? getExternalModuleOrNamespaceExportName(currentNamespaceContainerName, node, /*allowComments*/ false, /*allowSourceMaps*/ true)
+                : getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ true);
+
+            //  x || (x = {})
+            //  exports.x || (exports.x = {})
+            let moduleArg =
+                createLogicalOr(
+                    exportName,
+                    createAssignment(
+                        exportName,
+                        createObjectLiteral()
+                    )
+                );
+
+            if (hasNamespaceQualifiedExportName(node)) {
+                // `localName` is the expression used within this node's containing scope for any local references.
+                const localName = getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ true);
+
+                //  x = (exports.x || (exports.x = {}))
+                moduleArg = createAssignment(localName, moduleArg);
+            }
 
             //  (function (x) {
             //      x[x["y"] = 0] = "y";
@@ -2586,33 +2512,27 @@ namespace ts {
             const enumStatement = createStatement(
                 createCall(
                     createFunctionExpression(
+                        /*modifiers*/ undefined,
                         /*asteriskToken*/ undefined,
                         /*name*/ undefined,
                         /*typeParameters*/ undefined,
-                        [createParameter(parameterName)],
+                        [createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, parameterName)],
                         /*type*/ undefined,
                         transformEnumBody(node, containerName)
                     ),
                     /*typeArguments*/ undefined,
-                    [createLogicalOr(
-                        exportName,
-                        createAssignment(
-                            exportName,
-                            createObjectLiteral()
-                        )
-                    )]
-                ),
-                /*location*/ node
+                    [moduleArg]
+                )
             );
 
             setOriginalNode(enumStatement, node);
+            setTextRange(enumStatement, node);
             setEmitFlags(enumStatement, emitFlags);
             statements.push(enumStatement);
 
-            if (isNamespaceExport(node)) {
-                addVarForEnumExportedFromNamespace(statements, node);
-            }
-
+            // Add a DeclarationMarker for the enum to preserve trailing comments and mark
+            // the end of the declaration.
+            statements.push(createEndOfDeclarationMarker(node));
             return statements;
         }
 
@@ -2632,8 +2552,7 @@ namespace ts {
 
             currentNamespaceContainerName = savedCurrentNamespaceLocalName;
             return createBlock(
-                createNodeArray(statements, /*location*/ node.members),
-                /*location*/ undefined,
+                setTextRange(createNodeArray(statements), /*location*/ node.members),
                 /*multiLine*/ true
             );
         }
@@ -2648,22 +2567,31 @@ namespace ts {
             // we pass false as 'generateNameForComputedPropertyName' for a backward compatibility purposes
             // old emitter always generate 'expression' part of the name as-is.
             const name = getExpressionForPropertyName(member, /*generateNameForComputedPropertyName*/ false);
-            return createStatement(
+            const valueExpression = transformEnumMemberDeclarationValue(member);
+            const innerAssignment = createAssignment(
+                createElementAccess(
+                    currentNamespaceContainerName,
+                    name
+                ),
+                valueExpression
+            );
+            const outerAssignment = valueExpression.kind === SyntaxKind.StringLiteral ?
+                innerAssignment :
                 createAssignment(
                     createElementAccess(
                         currentNamespaceContainerName,
-                        createAssignment(
-                            createElementAccess(
-                                currentNamespaceContainerName,
-                                name
-                            ),
-                            transformEnumMemberDeclarationValue(member)
-                        )
+                        innerAssignment
                     ),
-                    name,
-                    /*location*/ member
+                    name
+                );
+            return setTextRange(
+                createStatement(
+                    setTextRange(
+                        outerAssignment,
+                        member
+                    )
                 ),
-                /*location*/ member
+                member
             );
         }
 
@@ -2697,9 +2625,15 @@ namespace ts {
             return isInstantiatedModule(node, compilerOptions.preserveConstEnums || compilerOptions.isolatedModules);
         }
 
-        function isES6ExportedDeclaration(node: Node) {
-            return isExternalModuleExport(node)
-                && moduleKind === ModuleKind.ES6;
+        /**
+         * Determines whether an exported declaration will have a qualified export name (e.g. `f.x`
+         * or `exports.x`).
+         */
+        function hasNamespaceQualifiedExportName(node: Node) {
+            return isExportOfNamespace(node)
+                || (isExternalModuleExport(node)
+                    && moduleKind !== ModuleKind.ES2015
+                    && moduleKind !== ModuleKind.System);
         }
 
         /**
@@ -2716,8 +2650,8 @@ namespace ts {
                     currentScopeFirstDeclarationsOfName = createMap<Node>();
                 }
 
-                if (!(name in currentScopeFirstDeclarationsOfName)) {
-                    currentScopeFirstDeclarationsOfName[name] = node;
+                if (!currentScopeFirstDeclarationsOfName.has(name)) {
+                    currentScopeFirstDeclarationsOfName.set(name, node);
                 }
             }
         }
@@ -2730,64 +2664,74 @@ namespace ts {
             if (currentScopeFirstDeclarationsOfName) {
                 const name = node.symbol && node.symbol.name;
                 if (name) {
-                    return currentScopeFirstDeclarationsOfName[name] === node;
+                    return currentScopeFirstDeclarationsOfName.get(name) === node;
                 }
             }
 
             return false;
         }
 
-        function shouldEmitVarForModuleDeclaration(node: ModuleDeclaration) {
-            return isFirstEmittedDeclarationInScope(node);
-        }
-
         /**
          * Adds a leading VariableStatement for a enum or module declaration.
          */
         function addVarForEnumOrModuleDeclaration(statements: Statement[], node: ModuleDeclaration | EnumDeclaration) {
-            // Emit a variable statement for the module.
+            // Emit a variable statement for the module. We emit top-level enums as a `var`
+            // declaration to avoid static errors in global scripts scripts due to redeclaration.
+            // enums in any other scope are emitted as a `let` declaration.
             const statement = createVariableStatement(
-                isES6ExportedDeclaration(node)
-                    ? visitNodes(node.modifiers, visitor, isModifier)
-                    : undefined,
-                [
+                visitNodes(node.modifiers, modifierVisitor, isModifier),
+                createVariableDeclarationList([
                     createVariableDeclaration(
-                        getDeclarationName(node, /*allowComments*/ false, /*allowSourceMaps*/ true)
+                        getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ true)
                     )
-                ]
+                ], currentScope.kind === SyntaxKind.SourceFile ? NodeFlags.None : NodeFlags.Let)
             );
 
-            setOriginalNode(statement, /*original*/ node);
+            setOriginalNode(statement, node);
+
+            recordEmittedDeclarationInScope(node);
+            if (isFirstEmittedDeclarationInScope(node)) {
+                // Adjust the source map emit to match the old emitter.
+                if (node.kind === SyntaxKind.EnumDeclaration) {
+                    setSourceMapRange(statement.declarationList, node);
+                }
+                else {
+                    setSourceMapRange(statement, node);
+                }
 
-            // Adjust the source map emit to match the old emitter.
-            if (node.kind === SyntaxKind.EnumDeclaration) {
-                setSourceMapRange(statement.declarationList, node);
+                // Trailing comments for module declaration should be emitted after the function closure
+                // instead of the variable statement:
+                //
+                //     /** Module comment*/
+                //     module m1 {
+                //         function foo4Export() {
+                //         }
+                //     } // trailing comment module
+                //
+                // Should emit:
+                //
+                //     /** Module comment*/
+                //     var m1;
+                //     (function (m1) {
+                //         function foo4Export() {
+                //         }
+                //     })(m1 || (m1 = {})); // trailing comment module
+                //
+                setCommentRange(statement, node);
+                setEmitFlags(statement, EmitFlags.NoTrailingComments | EmitFlags.HasEndOfDeclarationMarker);
+                statements.push(statement);
+                return true;
             }
             else {
-                setSourceMapRange(statement, node);
+                // For an EnumDeclaration or ModuleDeclaration that merges with a preceeding
+                // declaration we do not emit a leading variable declaration. To preserve the
+                // begin/end semantics of the declararation and to properly handle exports
+                // we wrap the leading variable declaration in a `MergeDeclarationMarker`.
+                const mergeMarker = createMergeDeclarationMarker(statement);
+                setEmitFlags(mergeMarker, EmitFlags.NoComments | EmitFlags.HasEndOfDeclarationMarker);
+                statements.push(mergeMarker);
+                return false;
             }
-
-            // Trailing comments for module declaration should be emitted after the function closure
-            // instead of the variable statement:
-            //
-            //     /** Module comment*/
-            //     module m1 {
-            //         function foo4Export() {
-            //         }
-            //     } // trailing comment module
-            //
-            // Should emit:
-            //
-            //     /** Module comment*/
-            //     var m1;
-            //     (function (m1) {
-            //         function foo4Export() {
-            //         }
-            //     })(m1 || (m1 = {})); // trailing comment module
-            //
-            setCommentRange(statement, node);
-            setEmitFlags(statement, EmitFlags.NoTrailingComments);
-            statements.push(statement);
         }
 
         /**
@@ -2814,9 +2758,7 @@ namespace ts {
             // If needed, we should emit a variable declaration for the module. If we emit
             // a leading variable declaration, we should not emit leading comments for the
             // module body.
-            recordEmittedDeclarationInScope(node);
-            if (shouldEmitVarForModuleDeclaration(node)) {
-                addVarForEnumOrModuleDeclaration(statements, node);
+            if (addVarForEnumOrModuleDeclaration(statements, node)) {
                 // We should still emit the comments if we are emitting a system module.
                 if (moduleKind !== ModuleKind.System || currentScope !== currentSourceFile) {
                     emitFlags |= EmitFlags.NoLeadingComments;
@@ -2830,7 +2772,9 @@ namespace ts {
             const containerName = getNamespaceContainerName(node);
 
             // `exportName` is the expression used within this node's container for any exported references.
-            const exportName = getExportName(node);
+            const exportName = hasModifier(node, ModifierFlags.Export)
+                ? getExternalModuleOrNamespaceExportName(currentNamespaceContainerName, node, /*allowComments*/ false, /*allowSourceMaps*/ true)
+                : getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ true);
 
             //  x || (x = {})
             //  exports.x || (exports.x = {})
@@ -2843,9 +2787,9 @@ namespace ts {
                     )
                 );
 
-            if (hasModifier(node, ModifierFlags.Export) && !isES6ExportedDeclaration(node)) {
+            if (hasNamespaceQualifiedExportName(node)) {
                 // `localName` is the expression used within this node's containing scope for any local references.
-                const localName = getLocalName(node);
+                const localName = getLocalName(node, /*allowComments*/ false, /*allowSourceMaps*/ true);
 
                 //  x = (exports.x || (exports.x = {}))
                 moduleArg = createAssignment(localName, moduleArg);
@@ -2857,22 +2801,27 @@ namespace ts {
             const moduleStatement = createStatement(
                 createCall(
                     createFunctionExpression(
+                        /*modifiers*/ undefined,
                         /*asteriskToken*/ undefined,
                         /*name*/ undefined,
                         /*typeParameters*/ undefined,
-                        [createParameter(parameterName)],
+                        [createParameter(/*decorators*/ undefined, /*modifiers*/ undefined, /*dotDotDotToken*/ undefined, parameterName)],
                         /*type*/ undefined,
                         transformModuleBody(node, containerName)
                     ),
                     /*typeArguments*/ undefined,
                     [moduleArg]
-                ),
-                /*location*/ node
+                )
             );
 
             setOriginalNode(moduleStatement, node);
+            setTextRange(moduleStatement, node);
             setEmitFlags(moduleStatement, emitFlags);
             statements.push(moduleStatement);
+
+            // Add a DeclarationMarker for the namespace to preserve trailing comments and mark
+            // the end of the declaration.
+            statements.push(createEndOfDeclarationMarker(node));
             return statements;
         }
 
@@ -2896,7 +2845,7 @@ namespace ts {
             let blockLocation: TextRange;
             const body = node.body;
             if (body.kind === SyntaxKind.ModuleBlock) {
-                addRange(statements, visitNodes((<ModuleBlock>body).statements, namespaceElementVisitor, isStatement));
+                saveStateAndInvoke(body, body => addRange(statements, visitNodes((<ModuleBlock>body).statements, namespaceElementVisitor, isStatement)));
                 statementsLocation = (<ModuleBlock>body).statements;
                 blockLocation = body;
             }
@@ -2921,13 +2870,13 @@ namespace ts {
             currentScopeFirstDeclarationsOfName = savedCurrentScopeFirstDeclarationsOfName;
 
             const block = createBlock(
-                createNodeArray(
-                    statements,
+                setTextRange(
+                    createNodeArray(statements),
                     /*location*/ statementsLocation
                 ),
-                /*location*/ blockLocation,
                 /*multiLine*/ true
             );
+            setTextRange(block, blockLocation);
 
             // namespace hello.hi.world {
             //      function foo() {}
@@ -2962,6 +2911,133 @@ namespace ts {
             }
         }
 
+        /**
+         * Visits an import declaration, eliding it if it is not referenced.
+         *
+         * @param node The import declaration node.
+         */
+        function visitImportDeclaration(node: ImportDeclaration): VisitResult<Statement> {
+            if (!node.importClause) {
+                // Do not elide a side-effect only import declaration.
+                //  import "foo";
+                return node;
+            }
+
+            // Elide the declaration if the import clause was elided.
+            const importClause = visitNode(node.importClause, visitImportClause, isImportClause);
+            return importClause
+                ? updateImportDeclaration(
+                    node,
+                    /*decorators*/ undefined,
+                    /*modifiers*/ undefined,
+                    importClause,
+                    node.moduleSpecifier)
+                : undefined;
+        }
+
+        /**
+         * Visits an import clause, eliding it if it is not referenced.
+         *
+         * @param node The import clause node.
+         */
+        function visitImportClause(node: ImportClause): VisitResult<ImportClause> {
+            // Elide the import clause if we elide both its name and its named bindings.
+            const name = resolver.isReferencedAliasDeclaration(node) ? node.name : undefined;
+            const namedBindings = visitNode(node.namedBindings, visitNamedImportBindings, isNamedImportBindings);
+            return (name || namedBindings) ? updateImportClause(node, name, namedBindings) : undefined;
+        }
+
+        /**
+         * Visits named import bindings, eliding it if it is not referenced.
+         *
+         * @param node The named import bindings node.
+         */
+        function visitNamedImportBindings(node: NamedImportBindings): VisitResult<NamedImportBindings> {
+            if (node.kind === SyntaxKind.NamespaceImport) {
+                // Elide a namespace import if it is not referenced.
+                return resolver.isReferencedAliasDeclaration(node) ? node : undefined;
+            }
+            else {
+                // Elide named imports if all of its import specifiers are elided.
+                const elements = visitNodes(node.elements, visitImportSpecifier, isImportSpecifier);
+                return some(elements) ? updateNamedImports(node, elements) : undefined;
+            }
+        }
+
+        /**
+         * Visits an import specifier, eliding it if it is not referenced.
+         *
+         * @param node The import specifier node.
+         */
+        function visitImportSpecifier(node: ImportSpecifier): VisitResult<ImportSpecifier> {
+            // Elide an import specifier if it is not referenced.
+            return resolver.isReferencedAliasDeclaration(node) ? node : undefined;
+        }
+
+        /**
+         * Visits an export assignment, eliding it if it does not contain a clause that resolves
+         * to a value.
+         *
+         * @param node The export assignment node.
+         */
+        function visitExportAssignment(node: ExportAssignment): VisitResult<Statement> {
+            // Elide the export assignment if it does not reference a value.
+            return resolver.isValueAliasDeclaration(node)
+                ? visitEachChild(node, visitor, context)
+                : undefined;
+        }
+
+        /**
+         * Visits an export declaration, eliding it if it does not contain a clause that resolves
+         * to a value.
+         *
+         * @param node The export declaration node.
+         */
+        function visitExportDeclaration(node: ExportDeclaration): VisitResult<Statement> {
+            if (!node.exportClause) {
+                // Elide a star export if the module it references does not export a value.
+                return compilerOptions.isolatedModules || resolver.moduleExportsSomeValue(node.moduleSpecifier) ? node : undefined;
+            }
+
+            if (!resolver.isValueAliasDeclaration(node)) {
+                // Elide the export declaration if it does not export a value.
+                return undefined;
+            }
+
+            // Elide the export declaration if all of its named exports are elided.
+            const exportClause = visitNode(node.exportClause, visitNamedExports, isNamedExports);
+            return exportClause
+                ? updateExportDeclaration(
+                    node,
+                    /*decorators*/ undefined,
+                    /*modifiers*/ undefined,
+                    exportClause,
+                    node.moduleSpecifier)
+                : undefined;
+        }
+
+        /**
+         * Visits named exports, eliding it if it does not contain an export specifier that
+         * resolves to a value.
+         *
+         * @param node The named exports node.
+         */
+        function visitNamedExports(node: NamedExports): VisitResult<NamedExports> {
+            // Elide the named exports if all of its export specifiers were elided.
+            const elements = visitNodes(node.elements, visitExportSpecifier, isExportSpecifier);
+            return some(elements) ? updateNamedExports(node, elements) : undefined;
+        }
+
+        /**
+         * Visits an export specifier, eliding it if it does not resolve to a value.
+         *
+         * @param node The export specifier node.
+         */
+        function visitExportSpecifier(node: ExportSpecifier): VisitResult<ExportSpecifier> {
+            // Elide an export specifier if it does not reference a value.
+            return resolver.isValueAliasDeclaration(node) ? node : undefined;
+        }
+
         /**
          * Determines whether to emit an import equals declaration.
          *
@@ -2983,7 +3059,10 @@ namespace ts {
          */
         function visitImportEqualsDeclaration(node: ImportEqualsDeclaration): VisitResult<Statement> {
             if (isExternalModuleImportEqualsDeclaration(node)) {
-                return visitEachChild(node, visitor, context);
+                // Elide external module `import=` if it is not referenced.
+                return resolver.isReferencedAliasDeclaration(node)
+                    ? visitEachChild(node, visitor, context)
+                    : undefined;
             }
 
             if (!shouldEmitImportEqualsDeclaration(node)) {
@@ -2993,19 +3072,24 @@ namespace ts {
             const moduleReference = createExpressionFromEntityName(<EntityName>node.moduleReference);
             setEmitFlags(moduleReference, EmitFlags.NoComments | EmitFlags.NoNestedComments);
 
-            if (isNamedExternalModuleExport(node) || !isNamespaceExport(node)) {
+            if (isNamedExternalModuleExport(node) || !isExportOfNamespace(node)) {
                 //  export var ${name} = ${moduleReference};
                 //  var ${name} = ${moduleReference};
                 return setOriginalNode(
-                    createVariableStatement(
-                        visitNodes(node.modifiers, visitor, isModifier),
-                        createVariableDeclarationList([
-                            createVariableDeclaration(
-                                node.name,
-                                /*type*/ undefined,
-                                moduleReference
-                            )
-                        ]),
+                    setTextRange(
+                        createVariableStatement(
+                            visitNodes(node.modifiers, modifierVisitor, isModifier),
+                            createVariableDeclarationList([
+                                setOriginalNode(
+                                    createVariableDeclaration(
+                                        node.name,
+                                        /*type*/ undefined,
+                                        moduleReference
+                                    ),
+                                    node
+                                )
+                            ])
+                        ),
                         node
                     ),
                     node
@@ -3029,7 +3113,7 @@ namespace ts {
          *
          * @param node The node to test.
          */
-        function isNamespaceExport(node: Node) {
+        function isExportOfNamespace(node: Node) {
             return currentNamespace !== undefined && hasModifier(node, ModifierFlags.Export);
         }
 
@@ -3066,13 +3150,13 @@ namespace ts {
          * Creates a statement for the provided expression. This is used in calls to `map`.
          */
         function expressionToStatement(expression: Expression) {
-            return createStatement(expression, /*location*/ undefined);
+            return createStatement(expression);
         }
 
-        function addExportMemberAssignment(statements: Statement[], node: DeclarationStatement) {
+        function addExportMemberAssignment(statements: Statement[], node: ClassDeclaration | FunctionDeclaration) {
             const expression = createAssignment(
-                getExportName(node),
-                getLocalName(node, /*noSourceMaps*/ true)
+                getExternalModuleOrNamespaceExportName(currentNamespaceContainerName, node, /*allowComments*/ false, /*allowSourceMaps*/ true),
+                getLocalName(node)
             );
             setSourceMapRange(expression, createRange(node.name.pos, node.end));
 
@@ -3082,42 +3166,23 @@ namespace ts {
         }
 
         function createNamespaceExport(exportName: Identifier, exportValue: Expression, location?: TextRange) {
-            return createStatement(
-                createAssignment(
-                    getNamespaceMemberName(exportName, /*allowComments*/ false, /*allowSourceMaps*/ true),
-                    exportValue
+            return setTextRange(
+                createStatement(
+                    createAssignment(
+                        getNamespaceMemberName(currentNamespaceContainerName, exportName, /*allowComments*/ false, /*allowSourceMaps*/ true),
+                        exportValue
+                    )
                 ),
                 location
             );
         }
 
-        function createExternalModuleExport(exportName: Identifier) {
-            return createExportDeclaration(
-                /*decorators*/ undefined,
-                /*modifiers*/ undefined,
-                createNamedExports([
-                    createExportSpecifier(exportName)
-                ])
-            );
-        }
-
-        function getNamespaceMemberName(name: Identifier, allowComments?: boolean, allowSourceMaps?: boolean): Expression {
-            const qualifiedName = createPropertyAccess(currentNamespaceContainerName, getSynthesizedClone(name), /*location*/ name);
-            let emitFlags: EmitFlags;
-            if (!allowComments) {
-                emitFlags |= EmitFlags.NoComments;
-            }
-            if (!allowSourceMaps) {
-                emitFlags |= EmitFlags.NoSourceMap;
-            }
-            if (emitFlags) {
-                setEmitFlags(qualifiedName, emitFlags);
-            }
-            return qualifiedName;
+        function createNamespaceExportExpression(exportName: Identifier, exportValue: Expression, location?: TextRange) {
+            return setTextRange(createAssignment(getNamespaceMemberNameWithSourceMapsAndWithoutComments(exportName), exportValue), location);
         }
 
         function getNamespaceMemberNameWithSourceMapsAndWithoutComments(name: Identifier) {
-            return getNamespaceMemberName(name, /*allowComments*/ false, /*allowSourceMaps*/ true);
+            return getNamespaceMemberName(currentNamespaceContainerName, name, /*allowComments*/ false, /*allowSourceMaps*/ true);
         }
 
         /**
@@ -3138,65 +3203,17 @@ namespace ts {
         }
 
         /**
-         * Gets the local name for a declaration for use in expressions.
-         *
-         * A local name will *never* be prefixed with an module or namespace export modifier like
-         * "exports.".
-         *
-         * @param node The declaration.
-         * @param noSourceMaps A value indicating whether source maps may not be emitted for the name.
-         * @param allowComments A value indicating whether comments may be emitted for the name.
-         */
-        function getLocalName(node: DeclarationStatement | ClassExpression, noSourceMaps?: boolean, allowComments?: boolean) {
-            return getDeclarationName(node, allowComments, !noSourceMaps, EmitFlags.LocalName);
-        }
-
-        /**
-         * Gets the export name for a declaration for use in expressions.
-         *
-         * An export name will *always* be prefixed with an module or namespace export modifier
-         * like "exports." if one is required.
-         *
-         * @param node The declaration.
-         * @param noSourceMaps A value indicating whether source maps may not be emitted for the name.
-         * @param allowComments A value indicating whether comments may be emitted for the name.
+         * Gets a local alias for a class declaration if it is a decorated class with an internal
+         * reference to the static side of the class. This is necessary to avoid issues with
+         * double-binding semantics for the class name.
          */
-        function getExportName(node: DeclarationStatement | ClassExpression, noSourceMaps?: boolean, allowComments?: boolean) {
-            if (isNamespaceExport(node)) {
-                return getNamespaceMemberName(getDeclarationName(node), allowComments, !noSourceMaps);
-            }
-
-            return getDeclarationName(node, allowComments, !noSourceMaps, EmitFlags.ExportName);
-        }
-
-        /**
-         * Gets the name for a declaration for use in declarations.
-         *
-         * @param node The declaration.
-         * @param allowComments A value indicating whether comments may be emitted for the name.
-         * @param allowSourceMaps A value indicating whether source maps may be emitted for the name.
-         * @param emitFlags Additional NodeEmitFlags to specify for the name.
-         */
-        function getDeclarationName(node: DeclarationStatement | ClassExpression, allowComments?: boolean, allowSourceMaps?: boolean, emitFlags?: EmitFlags) {
-            if (node.name) {
-                const name = getMutableClone(node.name);
-                emitFlags |= getEmitFlags(node.name);
-                if (!allowSourceMaps) {
-                    emitFlags |= EmitFlags.NoSourceMap;
-                }
-
-                if (!allowComments) {
-                    emitFlags |= EmitFlags.NoComments;
-                }
-
-                if (emitFlags) {
-                    setEmitFlags(name, emitFlags);
-                }
-
-                return name;
-            }
-            else {
-                return getGeneratedNameForNode(node);
+        function getClassAliasIfNeeded(node: ClassDeclaration) {
+            if (resolver.getNodeCheckFlags(node) & NodeCheckFlags.ClassWithConstructorReference) {
+                enableSubstitutionForClassAliases();
+                const classAlias = createUniqueName(node.name && !isGeneratedIdentifier(node.name) ? unescapeIdentifier(node.name.text) : "default");
+                classAliases[getOriginalNodeId(node)] = classAlias;
+                hoistVariableDeclaration(classAlias);
+                return classAlias;
             }
         }
 
@@ -3217,25 +3234,6 @@ namespace ts {
             }
         }
 
-        function enableSubstitutionForAsyncMethodsWithSuper() {
-            if ((enabledSubstitutions & TypeScriptSubstitutionFlags.AsyncMethodsWithSuper) === 0) {
-                enabledSubstitutions |= TypeScriptSubstitutionFlags.AsyncMethodsWithSuper;
-
-                // We need to enable substitutions for call, property access, and element access
-                // if we need to rewrite super calls.
-                context.enableSubstitution(SyntaxKind.CallExpression);
-                context.enableSubstitution(SyntaxKind.PropertyAccessExpression);
-                context.enableSubstitution(SyntaxKind.ElementAccessExpression);
-
-                // We need to be notified when entering and exiting declarations that bind super.
-                context.enableEmitNotification(SyntaxKind.ClassDeclaration);
-                context.enableEmitNotification(SyntaxKind.MethodDeclaration);
-                context.enableEmitNotification(SyntaxKind.GetAccessor);
-                context.enableEmitNotification(SyntaxKind.SetAccessor);
-                context.enableEmitNotification(SyntaxKind.Constructor);
-            }
-        }
-
         function enableSubstitutionForClassAliases() {
             if ((enabledSubstitutions & TypeScriptSubstitutionFlags.ClassAliases) === 0) {
                 enabledSubstitutions |= TypeScriptSubstitutionFlags.ClassAliases;
@@ -3245,7 +3243,7 @@ namespace ts {
                 context.enableSubstitution(SyntaxKind.Identifier);
 
                 // Keep track of class aliases.
-                classAliases = createMap<Identifier>();
+                classAliases = [];
             }
         }
 
@@ -3263,15 +3261,6 @@ namespace ts {
             }
         }
 
-        function isSuperContainer(node: Node): node is SuperContainer {
-            const kind = node.kind;
-            return kind === SyntaxKind.ClassDeclaration
-                || kind === SyntaxKind.Constructor
-                || kind === SyntaxKind.MethodDeclaration
-                || kind === SyntaxKind.GetAccessor
-                || kind === SyntaxKind.SetAccessor;
-        }
-
         function isTransformedModuleDeclaration(node: Node): boolean {
             return getOriginalNode(node).kind === SyntaxKind.ModuleDeclaration;
         }
@@ -3283,16 +3272,16 @@ namespace ts {
         /**
          * Hook for node emit.
          *
+         * @param hint A hint as to the intended usage of the node.
          * @param node The node to emit.
          * @param emit A callback used to emit the node in the printer.
          */
-        function onEmitNode(emitContext: EmitContext, node: Node, emitCallback: (emitContext: EmitContext, node: Node) => void): void {
+        function onEmitNode(hint: EmitHint, node: Node, emitCallback: (hint: EmitHint, node: Node) => void): void {
             const savedApplicableSubstitutions = applicableSubstitutions;
-            const savedCurrentSuperContainer = currentSuperContainer;
-            // If we need to support substitutions for `super` in an async method,
-            // we should track it here.
-            if (enabledSubstitutions & TypeScriptSubstitutionFlags.AsyncMethodsWithSuper && isSuperContainer(node)) {
-                currentSuperContainer = node;
+            const savedCurrentSourceFile = currentSourceFile;
+
+            if (isSourceFile(node)) {
+                currentSourceFile = node;
             }
 
             if (enabledSubstitutions & TypeScriptSubstitutionFlags.NamespaceExports && isTransformedModuleDeclaration(node)) {
@@ -3303,22 +3292,21 @@ namespace ts {
                 applicableSubstitutions |= TypeScriptSubstitutionFlags.NonQualifiedEnumMembers;
             }
 
-            previousOnEmitNode(emitContext, node, emitCallback);
+            previousOnEmitNode(hint, node, emitCallback);
 
             applicableSubstitutions = savedApplicableSubstitutions;
-            currentSuperContainer = savedCurrentSuperContainer;
+            currentSourceFile = savedCurrentSourceFile;
         }
 
         /**
          * Hooks node substitutions.
          *
+         * @param hint A hint as to the intended usage of the node.
          * @param node The node to substitute.
-         * @param isExpression A value indicating whether the node is to be used in an expression
-         *                     position.
          */
-        function onSubstituteNode(emitContext: EmitContext, node: Node) {
-            node = previousOnSubstituteNode(emitContext, node);
-            if (emitContext === EmitContext.Expression) {
+        function onSubstituteNode(hint: EmitHint, node: Node) {
+            node = previousOnSubstituteNode(hint, node);
+            if (hint === EmitHint.Expression) {
                 return substituteExpression(<Expression>node);
             }
             else if (isShorthandPropertyAssignment(node)) {
@@ -3337,9 +3325,9 @@ namespace ts {
                     // destructuring assignment
                     if (node.objectAssignmentInitializer) {
                         const initializer = createAssignment(exportedName, node.objectAssignmentInitializer);
-                        return createPropertyAssignment(name, initializer, /*location*/ node);
+                        return setTextRange(createPropertyAssignment(name, initializer), node);
                     }
-                    return createPropertyAssignment(name, exportedName, /*location*/ node);
+                    return setTextRange(createPropertyAssignment(name, exportedName), node);
                 }
             }
             return node;
@@ -3353,11 +3341,6 @@ namespace ts {
                     return substitutePropertyAccessExpression(<PropertyAccessExpression>node);
                 case SyntaxKind.ElementAccessExpression:
                     return substituteElementAccessExpression(<ElementAccessExpression>node);
-                case SyntaxKind.CallExpression:
-                    if (enabledSubstitutions & TypeScriptSubstitutionFlags.AsyncMethodsWithSuper) {
-                        return substituteCallExpression(<CallExpression>node);
-                    }
-                    break;
             }
 
             return node;
@@ -3395,16 +3378,19 @@ namespace ts {
 
         function trySubstituteNamespaceExportedName(node: Identifier): Expression {
             // If this is explicitly a local name, do not substitute.
-            if (enabledSubstitutions & applicableSubstitutions && (getEmitFlags(node) & EmitFlags.LocalName) === 0) {
+            if (enabledSubstitutions & applicableSubstitutions && !isGeneratedIdentifier(node) && !isLocalName(node)) {
                 // If we are nested within a namespace declaration, we may need to qualifiy
                 // an identifier that is exported from a merged namespace.
                 const container = resolver.getReferencedExportContainer(node, /*prefixLocals*/ false);
-                if (container) {
+                if (container && container.kind !== SyntaxKind.SourceFile) {
                     const substitute =
                         (applicableSubstitutions & TypeScriptSubstitutionFlags.NamespaceExports && container.kind === SyntaxKind.ModuleDeclaration) ||
                         (applicableSubstitutions & TypeScriptSubstitutionFlags.NonQualifiedEnumMembers && container.kind === SyntaxKind.EnumDeclaration);
                     if (substitute) {
-                        return createPropertyAccess(getGeneratedNameForNode(container), node, /*location*/ node);
+                        return setTextRange(
+                            createPropertyAccess(getGeneratedNameForNode(container), node),
+                            /*location*/ node
+                        );
                     }
                 }
             }
@@ -3412,78 +3398,36 @@ namespace ts {
             return undefined;
         }
 
-        function substituteCallExpression(node: CallExpression): Expression {
-            const expression = node.expression;
-            if (isSuperProperty(expression)) {
-                const flags = getSuperContainerAsyncMethodFlags();
-                if (flags) {
-                    const argumentExpression = isPropertyAccessExpression(expression)
-                        ? substitutePropertyAccessExpression(expression)
-                        : substituteElementAccessExpression(expression);
-                    return createCall(
-                        createPropertyAccess(argumentExpression, "call"),
-                        /*typeArguments*/ undefined,
-                        [
-                            createThis(),
-                            ...node.arguments
-                        ]
-                    );
-                }
-            }
-            return node;
-        }
-
         function substitutePropertyAccessExpression(node: PropertyAccessExpression) {
-            if (enabledSubstitutions & TypeScriptSubstitutionFlags.AsyncMethodsWithSuper && node.expression.kind === SyntaxKind.SuperKeyword) {
-                const flags = getSuperContainerAsyncMethodFlags();
-                if (flags) {
-                    return createSuperAccessInAsyncMethod(
-                        createLiteral(node.name.text),
-                        flags,
-                        node
-                    );
-                }
-            }
-
             return substituteConstantValue(node);
         }
 
         function substituteElementAccessExpression(node: ElementAccessExpression) {
-            if (enabledSubstitutions & TypeScriptSubstitutionFlags.AsyncMethodsWithSuper && node.expression.kind === SyntaxKind.SuperKeyword) {
-                const flags = getSuperContainerAsyncMethodFlags();
-                if (flags) {
-                    return createSuperAccessInAsyncMethod(
-                        node.argumentExpression,
-                        flags,
-                        node
-                    );
-                }
-            }
-
             return substituteConstantValue(node);
         }
 
         function substituteConstantValue(node: PropertyAccessExpression | ElementAccessExpression): LeftHandSideExpression {
             const constantValue = tryGetConstEnumValue(node);
             if (constantValue !== undefined) {
+                // track the constant value on the node for the printer in needsDotDotForPropertyAccess
+                setConstantValue(node, constantValue);
+
                 const substitute = createLiteral(constantValue);
-                setSourceMapRange(substitute, node);
-                setCommentRange(substitute, node);
                 if (!compilerOptions.removeComments) {
                     const propertyName = isPropertyAccessExpression(node)
                         ? declarationNameToString(node.name)
                         : getTextOfNode(node.argumentExpression);
-                    substitute.trailingComment = ` ${propertyName} `;
+
+                    addSyntheticTrailingComment(substitute, SyntaxKind.MultiLineCommentTrivia, ` ${propertyName} `);
                 }
 
-                setConstantValue(node, constantValue);
                 return substitute;
             }
 
             return node;
         }
 
-        function tryGetConstEnumValue(node: Node): number {
+        function tryGetConstEnumValue(node: Node): string | number {
             if (compilerOptions.isolatedModules) {
                 return undefined;
             }
@@ -3492,32 +3436,87 @@ namespace ts {
                 ? resolver.getConstantValue(<PropertyAccessExpression | ElementAccessExpression>node)
                 : undefined;
         }
+    }
 
-        function createSuperAccessInAsyncMethod(argumentExpression: Expression, flags: NodeCheckFlags, location: TextRange): LeftHandSideExpression {
-            if (flags & NodeCheckFlags.AsyncMethodWithSuperBinding) {
-                return createPropertyAccess(
-                    createCall(
-                        createIdentifier("_super"),
-                        /*typeArguments*/ undefined,
-                        [argumentExpression]
-                    ),
-                    "value",
-                    location
-                );
-            }
-            else {
-                return createCall(
-                    createIdentifier("_super"),
-                    /*typeArguments*/ undefined,
-                    [argumentExpression],
-                    location
-                );
+    function createDecorateHelper(context: TransformationContext, decoratorExpressions: Expression[], target: Expression, memberName?: Expression, descriptor?: Expression, location?: TextRange) {
+        const argumentsArray: Expression[] = [];
+        argumentsArray.push(createArrayLiteral(decoratorExpressions, /*multiLine*/ true));
+        argumentsArray.push(target);
+        if (memberName) {
+            argumentsArray.push(memberName);
+            if (descriptor) {
+                argumentsArray.push(descriptor);
             }
         }
 
-        function getSuperContainerAsyncMethodFlags() {
-            return currentSuperContainer !== undefined
-                && resolver.getNodeCheckFlags(currentSuperContainer) & (NodeCheckFlags.AsyncMethodWithSuper | NodeCheckFlags.AsyncMethodWithSuperBinding);
-        }
+        context.requestEmitHelper(decorateHelper);
+        return setTextRange(
+            createCall(
+                getHelperName("__decorate"),
+                /*typeArguments*/ undefined,
+                argumentsArray
+            ),
+            location
+        );
     }
+
+    const decorateHelper: EmitHelper = {
+        name: "typescript:decorate",
+        scoped: false,
+        priority: 2,
+        text: `
+            var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
+                var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
+                if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
+                else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
+                return c > 3 && r && Object.defineProperty(target, key, r), r;
+            };`
+    };
+
+    function createMetadataHelper(context: TransformationContext, metadataKey: string, metadataValue: Expression) {
+        context.requestEmitHelper(metadataHelper);
+        return createCall(
+            getHelperName("__metadata"),
+            /*typeArguments*/ undefined,
+            [
+                createLiteral(metadataKey),
+                metadataValue
+            ]
+        );
+    }
+
+    const metadataHelper: EmitHelper = {
+        name: "typescript:metadata",
+        scoped: false,
+        priority: 3,
+        text: `
+            var __metadata = (this && this.__metadata) || function (k, v) {
+                if (typeof Reflect === "object" && typeof Reflect.metadata === "function") return Reflect.metadata(k, v);
+            };`
+    };
+
+    function createParamHelper(context: TransformationContext, expression: Expression, parameterOffset: number, location?: TextRange) {
+        context.requestEmitHelper(paramHelper);
+        return setTextRange(
+            createCall(
+                getHelperName("__param"),
+                /*typeArguments*/ undefined,
+                [
+                    createLiteral(parameterOffset),
+                    expression
+                ]
+            ),
+            location
+        );
+    }
+
+    const paramHelper: EmitHelper = {
+        name: "typescript:param",
+        scoped: false,
+        priority: 4,
+        text: `
+            var __param = (this && this.__param) || function (paramIndex, decorator) {
+                return function (target, key) { decorator(target, key, paramIndex); }
+            };`
+    };
 }
diff --git a/src/compiler/transformers/utilities.ts b/src/compiler/transformers/utilities.ts
new file mode 100644
index 0000000..a39115a
--- /dev/null
+++ b/src/compiler/transformers/utilities.ts
@@ -0,0 +1,180 @@
+/* @internal */
+namespace ts {
+    export function getOriginalNodeId(node: Node) {
+        node = getOriginalNode(node);
+        return node ? getNodeId(node) : 0;
+    }
+
+    export interface ExternalModuleInfo {
+        externalImports: (ImportDeclaration | ImportEqualsDeclaration | ExportDeclaration)[]; // imports of other external modules
+        externalHelpersImportDeclaration: ImportDeclaration | undefined; // import of external helpers
+        exportSpecifiers: Map<ExportSpecifier[]>; // export specifiers by name
+        exportedBindings: Identifier[][]; // exported names of local declarations
+        exportedNames: Identifier[]; // all exported names local to module
+        exportEquals: ExportAssignment | undefined; // an export= declaration if one was present
+        hasExportStarsToExportValues: boolean; // whether this module contains export*
+    }
+
+    export function collectExternalModuleInfo(sourceFile: SourceFile, resolver: EmitResolver, compilerOptions: CompilerOptions): ExternalModuleInfo {
+        const externalImports: (ImportDeclaration | ImportEqualsDeclaration | ExportDeclaration)[] = [];
+        const exportSpecifiers = createMultiMap<ExportSpecifier>();
+        const exportedBindings: Identifier[][] = [];
+        const uniqueExports = createMap<boolean>();
+        let exportedNames: Identifier[];
+        let hasExportDefault = false;
+        let exportEquals: ExportAssignment = undefined;
+        let hasExportStarsToExportValues = false;
+
+        for (const node of sourceFile.statements) {
+            switch (node.kind) {
+                case SyntaxKind.ImportDeclaration:
+                    // import "mod"
+                    // import x from "mod"
+                    // import * as x from "mod"
+                    // import { x, y } from "mod"
+                    externalImports.push(<ImportDeclaration>node);
+                    break;
+
+                case SyntaxKind.ImportEqualsDeclaration:
+                    if ((<ImportEqualsDeclaration>node).moduleReference.kind === SyntaxKind.ExternalModuleReference) {
+                        // import x = require("mod")
+                        externalImports.push(<ImportEqualsDeclaration>node);
+                    }
+
+                    break;
+
+                case SyntaxKind.ExportDeclaration:
+                    if ((<ExportDeclaration>node).moduleSpecifier) {
+                        if (!(<ExportDeclaration>node).exportClause) {
+                            // export * from "mod"
+                            externalImports.push(<ExportDeclaration>node);
+                            hasExportStarsToExportValues = true;
+                        }
+                        else {
+                            // export { x, y } from "mod"
+                            externalImports.push(<ExportDeclaration>node);
+                        }
+                    }
+                    else {
+                        // export { x, y }
+                        for (const specifier of (<ExportDeclaration>node).exportClause.elements) {
+                            if (!uniqueExports.get(specifier.name.text)) {
+                                const name = specifier.propertyName || specifier.name;
+                                exportSpecifiers.add(name.text, specifier);
+
+                                const decl = resolver.getReferencedImportDeclaration(name)
+                                    || resolver.getReferencedValueDeclaration(name);
+
+                                if (decl) {
+                                    multiMapSparseArrayAdd(exportedBindings, getOriginalNodeId(decl), specifier.name);
+                                }
+
+                                uniqueExports.set(specifier.name.text, true);
+                                exportedNames = append(exportedNames, specifier.name);
+                            }
+                        }
+                    }
+                    break;
+
+                case SyntaxKind.ExportAssignment:
+                    if ((<ExportAssignment>node).isExportEquals && !exportEquals) {
+                        // export = x
+                        exportEquals = <ExportAssignment>node;
+                    }
+                    break;
+
+                case SyntaxKind.VariableStatement:
+                    if (hasModifier(node, ModifierFlags.Export)) {
+                        for (const decl of (<VariableStatement>node).declarationList.declarations) {
+                            exportedNames = collectExportedVariableInfo(decl, uniqueExports, exportedNames);
+                        }
+                    }
+                    break;
+
+                case SyntaxKind.FunctionDeclaration:
+                    if (hasModifier(node, ModifierFlags.Export)) {
+                        if (hasModifier(node, ModifierFlags.Default)) {
+                            // export default function() { }
+                            if (!hasExportDefault) {
+                                multiMapSparseArrayAdd(exportedBindings, getOriginalNodeId(node), getDeclarationName(<FunctionDeclaration>node));
+                                hasExportDefault = true;
+                            }
+                        }
+                        else {
+                            // export function x() { }
+                            const name = (<FunctionDeclaration>node).name;
+                            if (!uniqueExports.get(name.text)) {
+                                multiMapSparseArrayAdd(exportedBindings, getOriginalNodeId(node), name);
+                                uniqueExports.set(name.text, true);
+                                exportedNames = append(exportedNames, name);
+                            }
+                        }
+                    }
+                    break;
+
+                case SyntaxKind.ClassDeclaration:
+                    if (hasModifier(node, ModifierFlags.Export)) {
+                        if (hasModifier(node, ModifierFlags.Default)) {
+                            // export default class { }
+                            if (!hasExportDefault) {
+                                multiMapSparseArrayAdd(exportedBindings, getOriginalNodeId(node), getDeclarationName(<ClassDeclaration>node));
+                                hasExportDefault = true;
+                            }
+                        }
+                        else {
+                            // export class x { }
+                            const name = (<ClassDeclaration>node).name;
+                            if (!uniqueExports.get(name.text)) {
+                                multiMapSparseArrayAdd(exportedBindings, getOriginalNodeId(node), name);
+                                uniqueExports.set(name.text, true);
+                                exportedNames = append(exportedNames, name);
+                            }
+                        }
+                    }
+                    break;
+            }
+        }
+
+        const externalHelpersModuleName = getOrCreateExternalHelpersModuleNameIfNeeded(sourceFile, compilerOptions, hasExportStarsToExportValues);
+        const externalHelpersImportDeclaration = externalHelpersModuleName && createImportDeclaration(
+            /*decorators*/ undefined,
+            /*modifiers*/ undefined,
+            createImportClause(/*name*/ undefined, createNamespaceImport(externalHelpersModuleName)),
+            createLiteral(externalHelpersModuleNameText));
+
+        if (externalHelpersImportDeclaration) {
+            externalImports.unshift(externalHelpersImportDeclaration);
+        }
+
+        return { externalImports, exportSpecifiers, exportEquals, hasExportStarsToExportValues, exportedBindings, exportedNames, externalHelpersImportDeclaration };
+    }
+
+    function collectExportedVariableInfo(decl: VariableDeclaration | BindingElement, uniqueExports: Map<boolean>, exportedNames: Identifier[]) {
+        if (isBindingPattern(decl.name)) {
+            for (const element of decl.name.elements) {
+                if (!isOmittedExpression(element)) {
+                    exportedNames = collectExportedVariableInfo(element, uniqueExports, exportedNames);
+                }
+            }
+        }
+        else if (!isGeneratedIdentifier(decl.name)) {
+            if (!uniqueExports.get(decl.name.text)) {
+                uniqueExports.set(decl.name.text, true);
+                exportedNames = append(exportedNames, decl.name);
+            }
+        }
+        return exportedNames;
+    }
+
+    /** Use a sparse array as a multi-map. */
+    function multiMapSparseArrayAdd<V>(map: V[][], key: number, value: V): V[] {
+        let values = map[key];
+        if (values) {
+            values.push(value);
+        }
+        else {
+            map[key] = values = [value];
+        }
+        return values;
+    }
+}
\ No newline at end of file
diff --git a/src/compiler/tsc.ts b/src/compiler/tsc.ts
index b39c017..3b2422b 100644
--- a/src/compiler/tsc.ts
+++ b/src/compiler/tsc.ts
@@ -29,8 +29,8 @@ namespace ts {
         }
     }
 
-    function reportEmittedFiles(files: string[], host: CompilerHost): void {
-        if (!files || files.length == 0) {
+    function reportEmittedFiles(files: string[]): void {
+        if (!files || files.length === 0) {
             return;
         }
 
@@ -43,66 +43,6 @@ namespace ts {
         }
     }
 
-    /**
-     * Checks to see if the locale is in the appropriate format,
-     * and if it is, attempts to set the appropriate language.
-     */
-    function validateLocaleAndSetLanguage(locale: string, errors: Diagnostic[]): boolean {
-        const matchResult = /^([a-z]+)([_\-]([a-z]+))?$/.exec(locale.toLowerCase());
-
-        if (!matchResult) {
-            errors.push(createCompilerDiagnostic(Diagnostics.Locale_must_be_of_the_form_language_or_language_territory_For_example_0_or_1, "en", "ja-jp"));
-            return false;
-        }
-
-        const language = matchResult[1];
-        const territory = matchResult[3];
-
-        // First try the entire locale, then fall back to just language if that's all we have.
-        // Either ways do not fail, and fallback to the English diagnostic strings.
-        if (!trySetLanguageAndTerritory(language, territory, errors)) {
-            trySetLanguageAndTerritory(language, undefined, errors);
-        }
-
-        return true;
-    }
-
-    function trySetLanguageAndTerritory(language: string, territory: string, errors: Diagnostic[]): boolean {
-        const compilerFilePath = normalizePath(sys.getExecutingFilePath());
-        const containingDirectoryPath = getDirectoryPath(compilerFilePath);
-
-        let filePath = combinePaths(containingDirectoryPath, language);
-
-        if (territory) {
-            filePath = filePath + "-" + territory;
-        }
-
-        filePath = sys.resolvePath(combinePaths(filePath, "diagnosticMessages.generated.json"));
-
-        if (!sys.fileExists(filePath)) {
-            return false;
-        }
-
-        // TODO: Add codePage support for readFile?
-        let fileContents = "";
-        try {
-            fileContents = sys.readFile(filePath);
-        }
-        catch (e) {
-            errors.push(createCompilerDiagnostic(Diagnostics.Unable_to_open_file_0, filePath));
-            return false;
-        }
-        try {
-            ts.localizedDiagnosticMessages = JSON.parse(fileContents);
-        }
-        catch (e) {
-            errors.push(createCompilerDiagnostic(Diagnostics.Corrupted_locale_file_0, filePath));
-            return false;
-        }
-
-        return true;
-    }
-
     function countLines(program: Program): number {
         let count = 0;
         forEach(program.getSourceFiles(), file => {
@@ -111,7 +51,7 @@ namespace ts {
         return count;
     }
 
-    function getDiagnosticText(message: DiagnosticMessage, ...args: any[]): string {
+    function getDiagnosticText(_message: DiagnosticMessage, ..._args: any[]): string {
         const diagnostic = createCompilerDiagnostic.apply(undefined, arguments);
         return <string>diagnostic.messageText;
     }
@@ -120,91 +60,8 @@ namespace ts {
         sys.write(ts.formatDiagnostics([diagnostic], host));
     }
 
-    const redForegroundEscapeSequence = "\u001b[91m";
-    const yellowForegroundEscapeSequence = "\u001b[93m";
-    const blueForegroundEscapeSequence = "\u001b[93m";
-    const gutterStyleSequence = "\u001b[100;30m";
-    const gutterSeparator = " ";
-    const resetEscapeSequence = "\u001b[0m";
-    const ellipsis = "...";
-    const categoryFormatMap = createMap<string>({
-        [DiagnosticCategory.Warning]: yellowForegroundEscapeSequence,
-        [DiagnosticCategory.Error]: redForegroundEscapeSequence,
-        [DiagnosticCategory.Message]: blueForegroundEscapeSequence,
-    });
-
-    function formatAndReset(text: string, formatStyle: string) {
-        return formatStyle + text + resetEscapeSequence;
-    }
-
     function reportDiagnosticWithColorAndContext(diagnostic: Diagnostic, host: FormatDiagnosticsHost): void {
-        let output = "";
-
-        if (diagnostic.file) {
-            const { start, length, file } = diagnostic;
-            const { line: firstLine, character: firstLineChar } = getLineAndCharacterOfPosition(file, start);
-            const { line: lastLine, character: lastLineChar } = getLineAndCharacterOfPosition(file, start + length);
-            const lastLineInFile = getLineAndCharacterOfPosition(file, file.text.length).line;
-            const relativeFileName = host ? convertToRelativePath(file.fileName, host.getCurrentDirectory(), fileName => host.getCanonicalFileName(fileName)) : file.fileName;
-
-            const hasMoreThanFiveLines = (lastLine - firstLine) >= 4;
-            let gutterWidth = (lastLine + 1 + "").length;
-            if (hasMoreThanFiveLines) {
-                gutterWidth = Math.max(ellipsis.length, gutterWidth);
-            }
-
-            output += sys.newLine;
-            for (let i = firstLine; i <= lastLine; i++) {
-                // If the error spans over 5 lines, we'll only show the first 2 and last 2 lines,
-                // so we'll skip ahead to the second-to-last line.
-                if (hasMoreThanFiveLines && firstLine + 1 < i && i < lastLine - 1) {
-                    output += formatAndReset(padLeft(ellipsis, gutterWidth), gutterStyleSequence) + gutterSeparator + sys.newLine;
-                    i = lastLine - 1;
-                }
-
-                const lineStart = getPositionOfLineAndCharacter(file, i, 0);
-                const lineEnd = i < lastLineInFile ? getPositionOfLineAndCharacter(file, i + 1, 0) : file.text.length;
-                let lineContent = file.text.slice(lineStart, lineEnd);
-                lineContent = lineContent.replace(/\s+$/g, "");  // trim from end
-                lineContent = lineContent.replace("\t", " ");    // convert tabs to single spaces
-
-                // Output the gutter and the actual contents of the line.
-                output += formatAndReset(padLeft(i + 1 + "", gutterWidth), gutterStyleSequence) + gutterSeparator;
-                output += lineContent + sys.newLine;
-
-                // Output the gutter and the error span for the line using tildes.
-                output += formatAndReset(padLeft("", gutterWidth), gutterStyleSequence) + gutterSeparator;
-                output += redForegroundEscapeSequence;
-                if (i === firstLine) {
-                    // If we're on the last line, then limit it to the last character of the last line.
-                    // Otherwise, we'll just squiggle the rest of the line, giving 'slice' no end position.
-                    const lastCharForLine = i === lastLine ? lastLineChar : undefined;
-
-                    output += lineContent.slice(0, firstLineChar).replace(/\S/g, " ");
-                    output += lineContent.slice(firstLineChar, lastCharForLine).replace(/./g, "~");
-                }
-                else if (i === lastLine) {
-                    output += lineContent.slice(0, lastLineChar).replace(/./g, "~");
-                }
-                else {
-                    // Squiggle the entire line.
-                    output += lineContent.replace(/./g, "~");
-                }
-                output += resetEscapeSequence;
-
-                output += sys.newLine;
-            }
-
-            output += sys.newLine;
-            output += `${ relativeFileName }(${ firstLine + 1 },${ firstLineChar + 1 }): `;
-        }
-
-        const categoryColor = categoryFormatMap[diagnostic.category];
-        const category = DiagnosticCategory[diagnostic.category].toLowerCase();
-        output += `${ formatAndReset(category, categoryColor) } TS${ diagnostic.code }: ${ flattenDiagnosticMessageText(diagnostic.messageText, sys.newLine) }`;
-        output += sys.newLine + sys.newLine;
-
-        sys.write(output);
+        sys.write(ts.formatDiagnosticsWithColorAndContext([diagnostic], host) + sys.newLine + sys.newLine);
     }
 
     function reportWatchDiagnostic(diagnostic: Diagnostic) {
@@ -215,7 +72,7 @@ namespace ts {
             output += `${ diagnostic.file.fileName }(${ loc.line + 1 },${ loc.character + 1 }): `;
         }
 
-        output += `${ flattenDiagnosticMessageText(diagnostic.messageText, sys.newLine) }${ sys.newLine }`;
+        output += `${ flattenDiagnosticMessageText(diagnostic.messageText, sys.newLine) }${ sys.newLine + sys.newLine + sys.newLine }`;
 
         sys.write(output);
     }
@@ -250,8 +107,8 @@ namespace ts {
         let compilerOptions: CompilerOptions;                       // Compiler options for compilation
         let compilerHost: CompilerHost;                             // Compiler host
         let hostGetSourceFile: typeof compilerHost.getSourceFile;   // getSourceFile method from default host
-        let timerHandleForRecompilation: number;                    // Handle for 0.25s wait timer to trigger recompilation
-        let timerHandleForDirectoryChanges: number;                 // Handle for 0.25s wait timer to trigger directory change handler
+        let timerHandleForRecompilation: any;                    // Handle for 0.25s wait timer to trigger recompilation
+        let timerHandleForDirectoryChanges: any;                 // Handle for 0.25s wait timer to trigger directory change handler
 
         // This map stores and reuses results of fileExists check that happen inside 'createProgram'
         // This allows to save time in module resolution heavy scenarios when existence of the same file might be checked multiple times.
@@ -263,7 +120,7 @@ namespace ts {
                 reportDiagnostic(createCompilerDiagnostic(Diagnostics.The_current_host_does_not_support_the_0_option, "--locale"), /* host */ undefined);
                 return sys.exit(ExitStatus.DiagnosticsPresent_OutputsSkipped);
             }
-            validateLocaleAndSetLanguage(commandLine.options.locale, commandLine.errors);
+            validateLocaleAndSetLanguage(commandLine.options.locale, sys, commandLine.errors);
         }
 
         // If there are any errors due to command line parsing and/or
@@ -283,9 +140,9 @@ namespace ts {
             return sys.exit(ExitStatus.Success);
         }
 
-        if (commandLine.options.help) {
+        if (commandLine.options.help || commandLine.options.all) {
             printVersion();
-            printHelp();
+            printHelp(commandLine.options.all);
             return sys.exit(ExitStatus.Success);
         }
 
@@ -322,7 +179,7 @@ namespace ts {
 
         if (commandLine.fileNames.length === 0 && !configFileName) {
             printVersion();
-            printHelp();
+            printHelp(commandLine.options.all);
             return sys.exit(ExitStatus.Success);
         }
 
@@ -340,7 +197,7 @@ namespace ts {
                     // When the configFileName is just "tsconfig.json", the watched directory should be
                     // the current directory; if there is a given "project" parameter, then the configFileName
                     // is an absolute file name.
-                    directory == "" ? "." : directory,
+                    directory === "" ? "." : directory,
                     watchedDirectoryChanged, /*recursive*/ true);
             }
         }
@@ -366,20 +223,13 @@ namespace ts {
                 return;
             }
 
-            const result = parseConfigFileTextToJson(configFileName, cachedConfigFileText);
-            const configObject = result.config;
-            if (!configObject) {
-                reportDiagnostics([result.error], /* compilerHost */ undefined);
-                sys.exit(ExitStatus.DiagnosticsPresent_OutputsSkipped);
-                return;
-            }
+            const result = parseJsonText(configFileName, cachedConfigFileText);
+            reportDiagnostics(result.parseDiagnostics, /* compilerHost */ undefined);
+
             const cwd = sys.getCurrentDirectory();
-            const configParseResult = parseJsonConfigFileContent(configObject, sys, getNormalizedAbsolutePath(getDirectoryPath(configFileName), cwd), commandLine.options, getNormalizedAbsolutePath(configFileName, cwd));
-            if (configParseResult.errors.length > 0) {
-                reportDiagnostics(configParseResult.errors, /* compilerHost */ undefined);
-                sys.exit(ExitStatus.DiagnosticsPresent_OutputsSkipped);
-                return;
-            }
+            const configParseResult = parseJsonSourceFileConfigFileContent(result, sys, getNormalizedAbsolutePath(getDirectoryPath(configFileName), cwd), commandLine.options, getNormalizedAbsolutePath(configFileName, cwd));
+            reportDiagnostics(configParseResult.errors, /* compilerHost */ undefined);
+
             if (isWatchSet(configParseResult.options)) {
                 if (!sys.watchFile) {
                     reportDiagnostic(createCompilerDiagnostic(Diagnostics.The_current_host_does_not_support_the_0_option, "--watch"), /* host */ undefined);
@@ -392,9 +242,9 @@ namespace ts {
                         // When the configFileName is just "tsconfig.json", the watched directory should be
                         // the current directory; if there is a given "project" parameter, then the configFileName
                         // is an absolute file name.
-                        directory == "" ? "." : directory,
+                        directory === "" ? "." : directory,
                         watchedDirectoryChanged, /*recursive*/ true);
-                };
+                }
             }
             return configParseResult;
         }
@@ -438,9 +288,11 @@ namespace ts {
         }
 
         function cachedFileExists(fileName: string): boolean {
-            return fileName in cachedExistingFiles
-                ? cachedExistingFiles[fileName]
-                : cachedExistingFiles[fileName] = hostFileExists(fileName);
+            let fileExists = cachedExistingFiles.get(fileName);
+            if (fileExists === undefined) {
+                cachedExistingFiles.set(fileName, fileExists = hostFileExists(fileName));
+            }
+            return fileExists;
         }
 
         function getSourceFile(fileName: string, languageVersion: ScriptTarget, onError?: (message: string) => void) {
@@ -456,7 +308,7 @@ namespace ts {
             const sourceFile = hostGetSourceFile(fileName, languageVersion, onError);
             if (sourceFile && isWatchSet(compilerOptions) && sys.watchFile) {
                 // Attach a file watcher
-                sourceFile.fileWatcher = sys.watchFile(sourceFile.fileName, (fileName: string, removed?: boolean) => sourceFileChanged(sourceFile, removed));
+                sourceFile.fileWatcher = sys.watchFile(sourceFile.fileName, (_fileName: string, removed?: boolean) => sourceFileChanged(sourceFile, removed));
             }
             return sourceFile;
         }
@@ -503,10 +355,14 @@ namespace ts {
         }
 
         function startTimerForHandlingDirectoryChanges() {
+            if (!sys.setTimeout || !sys.clearTimeout) {
+                return;
+            }
+
             if (timerHandleForDirectoryChanges) {
-                clearTimeout(timerHandleForDirectoryChanges);
+                sys.clearTimeout(timerHandleForDirectoryChanges);
             }
-            timerHandleForDirectoryChanges = setTimeout(directoryChangeHandler, 250);
+            timerHandleForDirectoryChanges = sys.setTimeout(directoryChangeHandler, 250);
         }
 
         function directoryChangeHandler() {
@@ -525,10 +381,14 @@ namespace ts {
         // operations (such as saving all modified files in an editor) a chance to complete before we kick
         // off a new compilation.
         function startTimerForRecompilation() {
+            if (!sys.setTimeout || !sys.clearTimeout) {
+                return;
+            }
+
             if (timerHandleForRecompilation) {
-                clearTimeout(timerHandleForRecompilation);
+                sys.clearTimeout(timerHandleForRecompilation);
             }
-            timerHandleForRecompilation = setTimeout(recompile, 250);
+            timerHandleForRecompilation = sys.setTimeout(recompile, 250);
         }
 
         function recompile() {
@@ -617,7 +477,7 @@ namespace ts {
 
             reportDiagnostics(sortAndDeduplicateDiagnostics(diagnostics), compilerHost);
 
-            reportEmittedFiles(emitOutput.emittedFiles, compilerHost);
+            reportEmittedFiles(emitOutput.emittedFiles);
 
             if (emitOutput.emitSkipped && diagnostics.length > 0) {
                 // If the emitter didn't emit anything, then pass that value along.
@@ -666,7 +526,7 @@ namespace ts {
         sys.write(getDiagnosticText(Diagnostics.Version_0, ts.version) + sys.newLine);
     }
 
-    function printHelp() {
+    function printHelp(showAllOptions: boolean) {
         const output: string[] = [];
 
         // We want to align our "syntax" and "examples" commands to a certain margin.
@@ -691,8 +551,9 @@ namespace ts {
         output.push(getDiagnosticText(Diagnostics.Options_Colon) + sys.newLine);
 
         // Sort our options by their names, (e.g. "--noImplicitAny" comes before "--watch")
-        const optsList = filter(optionDeclarations.slice(), v => !v.experimental);
-        optsList.sort((a, b) => compareValues<string>(a.name.toLowerCase(), b.name.toLowerCase()));
+        const optsList = showAllOptions ?
+            optionDeclarations.slice().sort((a, b) => compareValues<string>(a.name.toLowerCase(), b.name.toLowerCase())) :
+            filter(optionDeclarations.slice(), v => v.showInSimplifiedHelpView);
 
         // We want our descriptions to align at the same column in our output,
         // so we keep track of the longest option usage string.
@@ -726,13 +587,9 @@ namespace ts {
 
             if (option.name === "lib") {
                 description = getDiagnosticText(option.description);
-                const options: string[] = [];
                 const element = (<CommandLineOptionOfListType>option).element;
                 const typeMap = <Map<number | string>>element.type;
-                for (const key in typeMap) {
-                    options.push(`'${key}'`);
-                }
-                optionsDescriptionMap[description] = options;
+                optionsDescriptionMap.set(description, arrayFrom(typeMap.keys()).map(key => `'${key}'`));
             }
             else {
                 description = getDiagnosticText(option.description);
@@ -754,7 +611,7 @@ namespace ts {
         for (let i = 0; i < usageColumn.length; i++) {
             const usage = usageColumn[i];
             const description = descriptionColumn[i];
-            const kindsList = optionsDescriptionMap[description];
+            const kindsList = optionsDescriptionMap.get(description);
             output.push(usage + makePadding(marginLength - usage.length + 2) + description + sys.newLine);
 
             if (kindsList) {
@@ -790,7 +647,7 @@ namespace ts {
             reportDiagnostic(createCompilerDiagnostic(Diagnostics.A_tsconfig_json_file_is_already_defined_at_Colon_0, file), /* host */ undefined);
         }
         else {
-            sys.writeFile(file, JSON.stringify(generateTSConfig(options, fileNames), undefined, 4));
+            sys.writeFile(file, generateTSConfig(options, fileNames, sys.newLine));
             reportDiagnostic(createCompilerDiagnostic(Diagnostics.Successfully_created_a_tsconfig_json_file), /* host */ undefined);
         }
 
@@ -798,6 +655,10 @@ namespace ts {
     }
 }
 
+if (ts.Debug.isDebugging) {
+    ts.Debug.enableDebugInfo();
+}
+
 if (ts.sys.tryEnableSourceMapsForHost && /^development$/i.test(ts.sys.getEnvironmentVariable("NODE_ENV"))) {
     ts.sys.tryEnableSourceMapsForHost();
 }
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index f6d7917..ac64624 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -1,11 +1,30 @@
 namespace ts {
-
+    /**
+     * Type of objects whose values are all of the same type.
+     * The `in` and `for-in` operators can *not* be safely used,
+     * since `Object.prototype` may be modified by outside code.
+     */
     export interface MapLike<T> {
         [index: string]: T;
     }
 
-    export interface Map<T> extends MapLike<T> {
-        __mapBrand: any;
+    /** ES6 Map interface. */
+    export interface Map<T> {
+        get(key: string): T | undefined;
+        has(key: string): boolean;
+        set(key: string, value: T): this;
+        delete(key: string): boolean;
+        clear(): void;
+        forEach(action: (value: T, key: string) => void): void;
+        readonly size: number;
+        keys(): Iterator<string>;
+        values(): Iterator<T>;
+        entries(): Iterator<[string, T]>;
+    }
+
+    /** ES6 Iterator type. */
+    export interface Iterator<T> {
+        next(): { value: T, done: false } | { value: never, done: true };
     }
 
     // branded string type used to store absolute, normalized and canonicalized paths
@@ -45,6 +64,8 @@ namespace ts {
         // Literals
         NumericLiteral,
         StringLiteral,
+        JsxText,
+        JsxTextAllWhiteSpaces,
         RegularExpressionLiteral,
         NoSubstitutionTemplateLiteral,
         // Pseudo-literals
@@ -167,12 +188,14 @@ namespace ts {
         DeclareKeyword,
         GetKeyword,
         IsKeyword,
+        KeyOfKeyword,
         ModuleKeyword,
         NamespaceKeyword,
         NeverKeyword,
         ReadonlyKeyword,
         RequireKeyword,
         NumberKeyword,
+        ObjectKeyword,
         SetKeyword,
         StringKeyword,
         SymbolKeyword,
@@ -215,6 +238,9 @@ namespace ts {
         IntersectionType,
         ParenthesizedType,
         ThisType,
+        TypeOperator,
+        IndexedAccessType,
+        MappedType,
         LiteralType,
         // Binding patterns
         ObjectBindingPattern,
@@ -242,12 +268,13 @@ namespace ts {
         ConditionalExpression,
         TemplateExpression,
         YieldExpression,
-        SpreadElementExpression,
+        SpreadElement,
         ClassExpression,
         OmittedExpression,
         ExpressionWithTypeArguments,
         AsExpression,
         NonNullExpression,
+        MetaProperty,
 
         // Misc
         TemplateSpan,
@@ -302,9 +329,9 @@ namespace ts {
         JsxElement,
         JsxSelfClosingElement,
         JsxOpeningElement,
-        JsxText,
         JsxClosingElement,
         JsxAttribute,
+        JsxAttributes,
         JsxSpreadAttribute,
         JsxExpression,
 
@@ -317,11 +344,13 @@ namespace ts {
         // Property assignments
         PropertyAssignment,
         ShorthandPropertyAssignment,
+        SpreadAssignment,
 
         // Enum
         EnumMember,
         // Top-level nodes
         SourceFile,
+        Bundle,
 
         // JSDoc nodes
         JSDocTypeExpression,
@@ -344,6 +373,8 @@ namespace ts {
         JSDocThisType,
         JSDocComment,
         JSDocTag,
+        JSDocAugmentsTag,
+        JSDocClassTag,
         JSDocParameterTag,
         JSDocReturnTag,
         JSDocTypeTag,
@@ -352,9 +383,6 @@ namespace ts {
         JSDocPropertyTag,
         JSDocTypeLiteral,
         JSDocLiteralType,
-        JSDocNullKeyword,
-        JSDocUndefinedKeyword,
-        JSDocNeverKeyword,
 
         // Synthesized list
         SyntaxList,
@@ -362,9 +390,13 @@ namespace ts {
         // Transformation nodes
         NotEmittedStatement,
         PartiallyEmittedExpression,
+        CommaListExpression,
+        MergeDeclarationMarker,
+        EndOfDeclarationMarker,
 
         // Enum value count
         Count,
+
         // Markers
         FirstAssignment = EqualsToken,
         LastAssignment = CaretEqualsToken,
@@ -393,8 +425,8 @@ namespace ts {
         FirstNode = QualifiedName,
         FirstJSDocNode = JSDocTypeExpression,
         LastJSDocNode = JSDocLiteralType,
-        FirstJSDocTagNode = JSDocComment,
-        LastJSDocTagNode = JSDocNeverKeyword
+        FirstJSDocTagNode = JSDocTag,
+        LastJSDocTagNode = JSDocLiteralType
     }
 
     export const enum NodeFlags {
@@ -409,25 +441,31 @@ namespace ts {
         HasImplicitReturn =  1 << 7,  // If function implicitly returns on one of codepaths (initialized by binding)
         HasExplicitReturn =  1 << 8,  // If function has explicit reachable return on one of codepaths (initialized by binding)
         GlobalAugmentation = 1 << 9,  // Set if module declaration is an augmentation for the global scope
-        HasClassExtends =    1 << 10, // If the file has a non-ambient class with an extends clause in ES5 or lower (initialized by binding)
-        HasDecorators =      1 << 11, // If the file has decorators (initialized by binding)
-        HasParamDecorators = 1 << 12, // If the file has parameter decorators (initialized by binding)
-        HasAsyncFunctions =  1 << 13, // If the file has async functions (initialized by binding)
-        HasJsxSpreadAttributes = 1 << 14, // If the file as JSX spread attributes (initialized by binding)
-        DisallowInContext =  1 << 15, // If node was parsed in a context where 'in-expressions' are not allowed
-        YieldContext =       1 << 16, // If node was parsed in the 'yield' context created when parsing a generator
-        DecoratorContext =   1 << 17, // If node was parsed as part of a decorator
-        AwaitContext =       1 << 18, // If node was parsed in the 'await' context created when parsing an async function
-        ThisNodeHasError =   1 << 19, // If the parser encountered an error when parsing the code that created this node
-        JavaScriptFile =     1 << 20, // If node was parsed in a JavaScript
-        ThisNodeOrAnySubNodesHasError = 1 << 21, // If this node or any of its children had an error
-        HasAggregatedChildData = 1 << 22, // If we've computed data from children and cached it in this node
+        HasAsyncFunctions =  1 << 10, // If the file has async functions (initialized by binding)
+        DisallowInContext =  1 << 11, // If node was parsed in a context where 'in-expressions' are not allowed
+        YieldContext =       1 << 12, // If node was parsed in the 'yield' context created when parsing a generator
+        DecoratorContext =   1 << 13, // If node was parsed as part of a decorator
+        AwaitContext =       1 << 14, // If node was parsed in the 'await' context created when parsing an async function
+        ThisNodeHasError =   1 << 15, // If the parser encountered an error when parsing the code that created this node
+        JavaScriptFile =     1 << 16, // If node was parsed in a JavaScript
+        ThisNodeOrAnySubNodesHasError = 1 << 17, // If this node or any of its children had an error
+        HasAggregatedChildData = 1 << 18, // If we've computed data from children and cached it in this node
+
+        // This flag will be set when the parser encounters a dynamic import expression so that module resolution
+        // will not have to walk the tree if the flag is not set. However, this flag is just a approximation because
+        // once it is set, the flag never gets cleared (hence why it's named "PossiblyContainsDynamicImport").
+        // During editing, if dynamic import is removed, incremental parsing will *NOT* update this flag. This means that the tree will always be traversed
+        // during module resolution. However, the removal operation should not occur often and in the case of the
+        // removal, it is likely that users will add the import anyway.
+        // The advantage of this approach is its simplicity. For the case of batch compilation,
+        // we guarantee that users won't have to pay the price of walking the tree if a dynamic import isn't used.
+        /* @internal */
+        PossiblyContainsDynamicImport = 1 << 19,
 
         BlockScoped = Let | Const,
 
         ReachabilityCheckFlags = HasImplicitReturn | HasExplicitReturn,
-        EmitHelperFlags = HasClassExtends | HasDecorators | HasParamDecorators | HasAsyncFunctions | HasJsxSpreadAttributes,
-        ReachabilityAndEmitFlags = ReachabilityCheckFlags | EmitHelperFlags,
+        ReachabilityAndEmitFlags = ReachabilityCheckFlags | HasAsyncFunctions,
 
         // Parsing context flags
         ContextFlags = DisallowInContext | YieldContext | DecoratorContext | AwaitContext | JavaScriptFile,
@@ -436,8 +474,6 @@ namespace ts {
         TypeExcludesFlags = YieldContext | AwaitContext,
     }
 
-    export type ModifiersArray = NodeArray<Modifier>;
-
     export const enum ModifierFlags {
         None =               0,
         Export =             1 << 0,  // Declarations
@@ -451,13 +487,15 @@ namespace ts {
         Async =              1 << 8,  // Property/Method/Function
         Default =            1 << 9,  // Function/Class (export default declaration)
         Const =              1 << 11, // Variable declaration
-
         HasComputedFlags =   1 << 29, // Modifier flags have been computed
 
         AccessibilityModifier = Public | Private | Protected,
         // Accessibility modifiers and 'readonly' can be attached to a parameter in a constructor to make it a property.
         ParameterPropertyModifier = AccessibilityModifier | Readonly,
         NonPublicAccessibilityModifier = Private | Protected,
+
+        TypeScriptModifier = Ambient | Public | Private | Protected | Readonly | Abstract | Const,
+        ExportDefault = Export | Default,
     }
 
     export const enum JsxFlags {
@@ -488,34 +526,53 @@ namespace ts {
         parent?: Node;                                  // Parent node (initialized by binding)
         /* @internal */ original?: Node;                // The original node if this is an updated node.
         /* @internal */ startsOnNewLine?: boolean;      // Whether a synthesized node should start on a new line (used by transforms).
-        /* @internal */ jsDocComments?: JSDoc[];        // JSDoc for the node, if it has any.
+        /* @internal */ jsDoc?: JSDoc[];                // JSDoc that directly precedes this node
+        /* @internal */ jsDocCache?: (JSDoc | JSDocTag)[]; // All JSDoc that applies to the node, including parent docs and @param tags
         /* @internal */ symbol?: Symbol;                // Symbol declared by node (initialized by binding)
         /* @internal */ locals?: SymbolTable;           // Locals associated with node (initialized by binding)
         /* @internal */ nextContainer?: Node;           // Next container in declaration order (initialized by binding)
         /* @internal */ localSymbol?: Symbol;           // Local symbol declared by node (initialized by binding only for exported nodes)
         /* @internal */ flowNode?: FlowNode;            // Associated FlowNode (initialized by binding)
         /* @internal */ emitNode?: EmitNode;            // Associated EmitNode (initialized by transforms)
+        /* @internal */ contextualType?: Type;          // Used to temporarily assign a contextual type during overload resolution
+        /* @internal */ contextualMapper?: TypeMapper;  // Mapper for contextual type
     }
 
     export interface NodeArray<T extends Node> extends Array<T>, TextRange {
         hasTrailingComma?: boolean;
+        /* @internal */ transformFlags?: TransformFlags;
     }
 
-    export interface Token extends Node {
-        __tokenTag: any;
-    }
+    export interface Token<TKind extends SyntaxKind> extends Node {
+        kind: TKind;
+    }
+
+    export type DotDotDotToken = Token<SyntaxKind.DotDotDotToken>;
+    export type QuestionToken = Token<SyntaxKind.QuestionToken>;
+    export type ColonToken = Token<SyntaxKind.ColonToken>;
+    export type EqualsToken = Token<SyntaxKind.EqualsToken>;
+    export type AsteriskToken = Token<SyntaxKind.AsteriskToken>;
+    export type EqualsGreaterThanToken = Token<SyntaxKind.EqualsGreaterThanToken>;
+    export type EndOfFileToken = Token<SyntaxKind.EndOfFileToken>;
+    export type AtToken = Token<SyntaxKind.AtToken>;
+    export type ReadonlyToken = Token<SyntaxKind.ReadonlyKeyword>;
+    export type AwaitKeywordToken = Token<SyntaxKind.AwaitKeyword>;
+
+    export type Modifier
+        = Token<SyntaxKind.AbstractKeyword>
+        | Token<SyntaxKind.AsyncKeyword>
+        | Token<SyntaxKind.ConstKeyword>
+        | Token<SyntaxKind.DeclareKeyword>
+        | Token<SyntaxKind.DefaultKeyword>
+        | Token<SyntaxKind.ExportKeyword>
+        | Token<SyntaxKind.PublicKeyword>
+        | Token<SyntaxKind.PrivateKeyword>
+        | Token<SyntaxKind.ProtectedKeyword>
+        | Token<SyntaxKind.ReadonlyKeyword>
+        | Token<SyntaxKind.StaticKeyword>
+        ;
 
-    // @kind(SyntaxKind.AbstractKeyword)
-    // @kind(SyntaxKind.AsyncKeyword)
-    // @kind(SyntaxKind.ConstKeyword)
-    // @kind(SyntaxKind.DeclareKeyword)
-    // @kind(SyntaxKind.DefaultKeyword)
-    // @kind(SyntaxKind.ExportKeyword)
-    // @kind(SyntaxKind.PublicKeyword)
-    // @kind(SyntaxKind.PrivateKeyword)
-    // @kind(SyntaxKind.ProtectedKeyword)
-    // @kind(SyntaxKind.StaticKeyword)
-    export interface Modifier extends Token { }
+    export type ModifiersArray = NodeArray<Modifier>;
 
     /*@internal*/
     export const enum GeneratedIdentifierKind {
@@ -526,12 +583,18 @@ namespace ts {
         Node,   // Unique name based on the node in the 'original' property.
     }
 
-    // @kind(SyntaxKind.Identifier)
     export interface Identifier extends PrimaryExpression {
-        text: string;                                  // Text of identifier (with escapes converted to characters)
-        originalKeywordKind?: SyntaxKind;              // Original syntaxKind which get set so that we can report an error later
+        kind: SyntaxKind.Identifier;
+        /**
+         * Text of identifier (with escapes converted to characters).
+         * If the identifier begins with two underscores, this will begin with three.
+         */
+        text: string;
+        originalKeywordKind?: SyntaxKind;                         // Original syntaxKind which get set so that we can report an error later
         /*@internal*/ autoGenerateKind?: GeneratedIdentifierKind; // Specifies whether to auto-generate the text for an identifier.
-        /*@internal*/ autoGenerateId?: number;         // Ensures unique generated identifiers get unique names, but clones get the same name.
+        /*@internal*/ autoGenerateId?: number;                    // Ensures unique generated identifiers get unique names, but clones get the same name.
+        isInJSDocNamespace?: boolean;                             // if the node is a member in a JSDoc namespace
+        /*@internal*/ typeArguments?: NodeArray<TypeNode>;        // Only defined on synthesized nodes. Though not syntactically valid, used in emitting diagnostics.
     }
 
     // Transient identifier node (marked by id === -1)
@@ -539,170 +602,198 @@ namespace ts {
         resolvedSymbol: Symbol;
     }
 
-    // @kind(SyntaxKind.QualifiedName)
+    /*@internal*/
+    export interface GeneratedIdentifier extends Identifier {
+        autoGenerateKind: GeneratedIdentifierKind.Auto
+                        | GeneratedIdentifierKind.Loop
+                        | GeneratedIdentifierKind.Unique
+                        | GeneratedIdentifierKind.Node;
+    }
+
     export interface QualifiedName extends Node {
-        // Must have same layout as PropertyAccess
+        kind: SyntaxKind.QualifiedName;
         left: EntityName;
         right: Identifier;
     }
 
     export type EntityName = Identifier | QualifiedName;
 
-    export type PropertyName = Identifier | LiteralExpression | ComputedPropertyName;
+    export type PropertyName = Identifier | StringLiteral | NumericLiteral | ComputedPropertyName;
 
-    export type DeclarationName = Identifier | LiteralExpression | ComputedPropertyName | BindingPattern;
+    export type DeclarationName = Identifier | StringLiteral | NumericLiteral | ComputedPropertyName | BindingPattern;
 
     export interface Declaration extends Node {
         _declarationBrand: any;
+    }
+
+    export interface NamedDeclaration extends Declaration {
         name?: DeclarationName;
     }
 
-    export interface DeclarationStatement extends Declaration, Statement {
-        name?: Identifier;
+    export interface DeclarationStatement extends NamedDeclaration, Statement {
+        name?: Identifier | StringLiteral | NumericLiteral;
     }
 
-    // @kind(SyntaxKind.ComputedPropertyName)
     export interface ComputedPropertyName extends Node {
+        kind: SyntaxKind.ComputedPropertyName;
         expression: Expression;
     }
 
-    // @kind(SyntaxKind.Decorator)
     export interface Decorator extends Node {
+        kind: SyntaxKind.Decorator;
         expression: LeftHandSideExpression;
     }
 
-    // @kind(SyntaxKind.TypeParameter)
-    export interface TypeParameterDeclaration extends Declaration {
+    export interface TypeParameterDeclaration extends NamedDeclaration {
+        kind: SyntaxKind.TypeParameter;
+        parent?: DeclarationWithTypeParameters;
         name: Identifier;
         constraint?: TypeNode;
+        default?: TypeNode;
 
         // For error recovery purposes.
         expression?: Expression;
     }
 
-    export interface SignatureDeclaration extends Declaration {
+    export interface SignatureDeclaration extends NamedDeclaration {
         name?: PropertyName;
         typeParameters?: NodeArray<TypeParameterDeclaration>;
         parameters: NodeArray<ParameterDeclaration>;
         type?: TypeNode;
     }
 
-    // @kind(SyntaxKind.CallSignature)
-    export interface CallSignatureDeclaration extends SignatureDeclaration, TypeElement { }
+    export interface CallSignatureDeclaration extends SignatureDeclaration, TypeElement {
+        kind: SyntaxKind.CallSignature;
+    }
 
-    // @kind(SyntaxKind.ConstructSignature)
-    export interface ConstructSignatureDeclaration extends SignatureDeclaration, TypeElement { }
+    export interface ConstructSignatureDeclaration extends SignatureDeclaration, TypeElement {
+        kind: SyntaxKind.ConstructSignature;
+    }
 
     export type BindingName = Identifier | BindingPattern;
 
-    // @kind(SyntaxKind.VariableDeclaration)
-    export interface VariableDeclaration extends Declaration {
-        parent?: VariableDeclarationList;
+    export interface VariableDeclaration extends NamedDeclaration {
+        kind: SyntaxKind.VariableDeclaration;
+        parent?: VariableDeclarationList | CatchClause;
         name: BindingName;                  // Declared variable name
         type?: TypeNode;                    // Optional type annotation
         initializer?: Expression;           // Optional initializer
     }
 
-    // @kind(SyntaxKind.VariableDeclarationList)
     export interface VariableDeclarationList extends Node {
+        kind: SyntaxKind.VariableDeclarationList;
+        parent?: VariableStatement | ForStatement | ForOfStatement | ForInStatement;
         declarations: NodeArray<VariableDeclaration>;
     }
 
-    // @kind(SyntaxKind.Parameter)
-    export interface ParameterDeclaration extends Declaration {
-        dotDotDotToken?: Node;              // Present on rest parameter
+    export interface ParameterDeclaration extends NamedDeclaration {
+        kind: SyntaxKind.Parameter;
+        parent?: SignatureDeclaration;
+        dotDotDotToken?: DotDotDotToken;    // Present on rest parameter
         name: BindingName;                  // Declared parameter name
-        questionToken?: Node;               // Present on optional parameter
+        questionToken?: QuestionToken;      // Present on optional parameter
         type?: TypeNode;                    // Optional type annotation
         initializer?: Expression;           // Optional initializer
     }
 
-    // @kind(SyntaxKind.BindingElement)
-    export interface BindingElement extends Declaration {
+    export interface BindingElement extends NamedDeclaration {
+        kind: SyntaxKind.BindingElement;
+        parent?: BindingPattern;
         propertyName?: PropertyName;        // Binding property name (in object binding pattern)
-        dotDotDotToken?: Node;              // Present on rest binding element
+        dotDotDotToken?: DotDotDotToken;    // Present on rest element (in object binding pattern)
         name: BindingName;                  // Declared binding element name
         initializer?: Expression;           // Optional initializer
     }
 
-    // @kind(SyntaxKind.PropertySignature)
     export interface PropertySignature extends TypeElement {
+        kind: SyntaxKind.PropertySignature | SyntaxKind.JSDocRecordMember;
         name: PropertyName;                 // Declared property name
-        questionToken?: Node;               // Present on optional property
+        questionToken?: QuestionToken;      // Present on optional property
         type?: TypeNode;                    // Optional type annotation
         initializer?: Expression;           // Optional initializer
     }
 
-    // @kind(SyntaxKind.PropertyDeclaration)
     export interface PropertyDeclaration extends ClassElement {
-        questionToken?: Node;               // Present for use with reporting a grammar error
+        kind: SyntaxKind.PropertyDeclaration;
+        questionToken?: QuestionToken;      // Present for use with reporting a grammar error
         name: PropertyName;
         type?: TypeNode;
         initializer?: Expression;           // Optional initializer
     }
 
-    export interface ObjectLiteralElement extends Declaration {
+    export interface ObjectLiteralElement extends NamedDeclaration {
         _objectLiteralBrandBrand: any;
         name?: PropertyName;
-   }
+    }
 
-    export type ObjectLiteralElementLike = PropertyAssignment | ShorthandPropertyAssignment | MethodDeclaration | AccessorDeclaration;
+    export type ObjectLiteralElementLike
+        = PropertyAssignment
+        | ShorthandPropertyAssignment
+        | SpreadAssignment
+        | MethodDeclaration
+        | AccessorDeclaration
+        ;
 
-    // @kind(SyntaxKind.PropertyAssignment)
     export interface PropertyAssignment extends ObjectLiteralElement {
-        _propertyAssignmentBrand: any;
+        kind: SyntaxKind.PropertyAssignment;
         name: PropertyName;
-        questionToken?: Node;
+        questionToken?: QuestionToken;
         initializer: Expression;
     }
 
-    // @kind(SyntaxKind.ShorthandPropertyAssignment)
     export interface ShorthandPropertyAssignment extends ObjectLiteralElement {
+        kind: SyntaxKind.ShorthandPropertyAssignment;
         name: Identifier;
-        questionToken?: Node;
+        questionToken?: QuestionToken;
         // used when ObjectLiteralExpression is used in ObjectAssignmentPattern
         // it is grammar error to appear in actual object initializer
-        equalsToken?: Node;
+        equalsToken?: Token<SyntaxKind.EqualsToken>;
         objectAssignmentInitializer?: Expression;
     }
 
+    export interface SpreadAssignment extends ObjectLiteralElement {
+        kind: SyntaxKind.SpreadAssignment;
+        expression: Expression;
+    }
+
     // SyntaxKind.VariableDeclaration
     // SyntaxKind.Parameter
     // SyntaxKind.BindingElement
     // SyntaxKind.Property
     // SyntaxKind.PropertyAssignment
+    // SyntaxKind.JsxAttribute
     // SyntaxKind.ShorthandPropertyAssignment
     // SyntaxKind.EnumMember
     // SyntaxKind.JSDocPropertyTag
-    export interface VariableLikeDeclaration extends Declaration {
+    export interface VariableLikeDeclaration extends NamedDeclaration {
         propertyName?: PropertyName;
-        dotDotDotToken?: Node;
+        dotDotDotToken?: DotDotDotToken;
         name: DeclarationName;
-        questionToken?: Node;
+        questionToken?: QuestionToken;
         type?: TypeNode;
         initializer?: Expression;
     }
 
-    export interface PropertyLikeDeclaration extends Declaration {
+    export interface PropertyLikeDeclaration extends NamedDeclaration {
         name: PropertyName;
     }
 
-    export interface BindingPattern extends Node {
-        elements: NodeArray<BindingElement | ArrayBindingElement>;
-    }
-
-    // @kind(SyntaxKind.ObjectBindingPattern)
-    export interface ObjectBindingPattern extends BindingPattern {
+    export interface ObjectBindingPattern extends Node {
+        kind: SyntaxKind.ObjectBindingPattern;
+        parent?: VariableDeclaration | ParameterDeclaration | BindingElement;
         elements: NodeArray<BindingElement>;
     }
 
-    export type ArrayBindingElement = BindingElement | OmittedExpression;
-
-    // @kind(SyntaxKind.ArrayBindingPattern)
-    export interface ArrayBindingPattern extends BindingPattern {
+    export interface ArrayBindingPattern extends Node {
+        kind: SyntaxKind.ArrayBindingPattern;
+        parent?: VariableDeclaration | ParameterDeclaration | BindingElement;
         elements: NodeArray<ArrayBindingElement>;
     }
 
+    export type BindingPattern = ObjectBindingPattern | ArrayBindingPattern;
+
+    export type ArrayBindingElement = BindingElement | OmittedExpression;
+
     /**
      * Several node kinds share function-like features such as a signature,
      * a name, and a body. These nodes should extend FunctionLikeDeclaration.
@@ -714,19 +805,19 @@ namespace ts {
     export interface FunctionLikeDeclaration extends SignatureDeclaration {
         _functionLikeDeclarationBrand: any;
 
-        asteriskToken?: Node;
-        questionToken?: Node;
+        asteriskToken?: AsteriskToken;
+        questionToken?: QuestionToken;
         body?: Block | Expression;
     }
 
-    // @kind(SyntaxKind.FunctionDeclaration)
     export interface FunctionDeclaration extends FunctionLikeDeclaration, DeclarationStatement {
+        kind: SyntaxKind.FunctionDeclaration;
         name?: Identifier;
         body?: FunctionBody;
     }
 
-    // @kind(SyntaxKind.MethodSignature)
     export interface MethodSignature extends SignatureDeclaration, TypeElement {
+        kind: SyntaxKind.MethodSignature;
         name: PropertyName;
     }
 
@@ -739,126 +830,162 @@ namespace ts {
     // Because of this, it may be necessary to determine what sort of MethodDeclaration you have
     // at later stages of the compiler pipeline.  In that case, you can either check the parent kind
     // of the method, or use helpers like isObjectLiteralMethodDeclaration
-    // @kind(SyntaxKind.MethodDeclaration)
     export interface MethodDeclaration extends FunctionLikeDeclaration, ClassElement, ObjectLiteralElement {
+        kind: SyntaxKind.MethodDeclaration;
         name: PropertyName;
         body?: FunctionBody;
     }
 
-    // @kind(SyntaxKind.Constructor)
     export interface ConstructorDeclaration extends FunctionLikeDeclaration, ClassElement {
+        kind: SyntaxKind.Constructor;
+        parent?: ClassDeclaration | ClassExpression;
         body?: FunctionBody;
     }
 
-    // For when we encounter a semicolon in a class declaration.  ES6 allows these as class elements.
-    // @kind(SyntaxKind.SemicolonClassElement)
+    /** For when we encounter a semicolon in a class declaration. ES6 allows these as class elements. */
     export interface SemicolonClassElement extends ClassElement {
-        _semicolonClassElementBrand: any;
+        kind: SyntaxKind.SemicolonClassElement;
+        parent?: ClassDeclaration | ClassExpression;
     }
 
-    // See the comment on MethodDeclaration for the intuition behind AccessorDeclaration being a
+    // See the comment on MethodDeclaration for the intuition behind GetAccessorDeclaration being a
     // ClassElement and an ObjectLiteralElement.
-    export interface AccessorDeclaration extends FunctionLikeDeclaration, ClassElement, ObjectLiteralElement {
-        _accessorDeclarationBrand: any;
+    export interface GetAccessorDeclaration extends FunctionLikeDeclaration, ClassElement, ObjectLiteralElement {
+        kind: SyntaxKind.GetAccessor;
+        parent?: ClassDeclaration | ClassExpression | ObjectLiteralExpression;
         name: PropertyName;
         body: FunctionBody;
     }
 
-    // @kind(SyntaxKind.GetAccessor)
-    export interface GetAccessorDeclaration extends AccessorDeclaration { }
+    // See the comment on MethodDeclaration for the intuition behind SetAccessorDeclaration being a
+    // ClassElement and an ObjectLiteralElement.
+    export interface SetAccessorDeclaration extends FunctionLikeDeclaration, ClassElement, ObjectLiteralElement {
+        kind: SyntaxKind.SetAccessor;
+        parent?: ClassDeclaration | ClassExpression | ObjectLiteralExpression;
+        name: PropertyName;
+        body: FunctionBody;
+    }
 
-    // @kind(SyntaxKind.SetAccessor)
-    export interface SetAccessorDeclaration extends AccessorDeclaration { }
+    export type AccessorDeclaration = GetAccessorDeclaration | SetAccessorDeclaration;
 
-    // @kind(SyntaxKind.IndexSignature)
     export interface IndexSignatureDeclaration extends SignatureDeclaration, ClassElement, TypeElement {
-        _indexSignatureDeclarationBrand: any;
+        kind: SyntaxKind.IndexSignature;
+        parent?: ClassDeclaration | ClassExpression | InterfaceDeclaration | TypeLiteralNode;
     }
 
-    // @kind(SyntaxKind.AnyKeyword)
-    // @kind(SyntaxKind.NumberKeyword)
-    // @kind(SyntaxKind.BooleanKeyword)
-    // @kind(SyntaxKind.StringKeyword)
-    // @kind(SyntaxKind.SymbolKeyword)
-    // @kind(SyntaxKind.VoidKeyword)
     export interface TypeNode extends Node {
         _typeNodeBrand: any;
     }
 
-    // @kind(SyntaxKind.ThisType)
+    export interface KeywordTypeNode extends TypeNode {
+        kind: SyntaxKind.AnyKeyword
+            | SyntaxKind.NumberKeyword
+            | SyntaxKind.ObjectKeyword
+            | SyntaxKind.BooleanKeyword
+            | SyntaxKind.StringKeyword
+            | SyntaxKind.SymbolKeyword
+            | SyntaxKind.ThisKeyword
+            | SyntaxKind.VoidKeyword
+            | SyntaxKind.UndefinedKeyword
+            | SyntaxKind.NullKeyword
+            | SyntaxKind.NeverKeyword;
+    }
+
     export interface ThisTypeNode extends TypeNode {
-        _thisTypeNodeBrand: any;
+        kind: SyntaxKind.ThisType;
     }
 
-    export interface FunctionOrConstructorTypeNode extends TypeNode, SignatureDeclaration {
-        _functionOrConstructorTypeNodeBrand: any;
+    export type FunctionOrConstructorTypeNode = FunctionTypeNode | ConstructorTypeNode;
+
+    export interface FunctionTypeNode extends TypeNode, SignatureDeclaration {
+        kind: SyntaxKind.FunctionType;
     }
 
-    // @kind(SyntaxKind.FunctionType)
-    export interface FunctionTypeNode extends FunctionOrConstructorTypeNode { }
+    export interface ConstructorTypeNode extends TypeNode, SignatureDeclaration {
+        kind: SyntaxKind.ConstructorType;
+    }
 
-    // @kind(SyntaxKind.ConstructorType)
-    export interface ConstructorTypeNode extends FunctionOrConstructorTypeNode { }
+    export type TypeReferenceType = TypeReferenceNode | ExpressionWithTypeArguments | JSDocTypeReference;
 
-    // @kind(SyntaxKind.TypeReference)
     export interface TypeReferenceNode extends TypeNode {
+        kind: SyntaxKind.TypeReference;
         typeName: EntityName;
         typeArguments?: NodeArray<TypeNode>;
     }
 
-    // @kind(SyntaxKind.TypePredicate)
     export interface TypePredicateNode extends TypeNode {
+        kind: SyntaxKind.TypePredicate;
         parameterName: Identifier | ThisTypeNode;
         type: TypeNode;
     }
 
-    // @kind(SyntaxKind.TypeQuery)
     export interface TypeQueryNode extends TypeNode {
+        kind: SyntaxKind.TypeQuery;
         exprName: EntityName;
     }
 
     // A TypeLiteral is the declaration node for an anonymous symbol.
-    // @kind(SyntaxKind.TypeLiteral)
     export interface TypeLiteralNode extends TypeNode, Declaration {
+        kind: SyntaxKind.TypeLiteral;
         members: NodeArray<TypeElement>;
     }
 
-    // @kind(SyntaxKind.ArrayType)
     export interface ArrayTypeNode extends TypeNode {
+        kind: SyntaxKind.ArrayType;
         elementType: TypeNode;
     }
 
-    // @kind(SyntaxKind.TupleType)
     export interface TupleTypeNode extends TypeNode {
+        kind: SyntaxKind.TupleType;
         elementTypes: NodeArray<TypeNode>;
     }
 
-    export interface UnionOrIntersectionTypeNode extends TypeNode {
+    export type UnionOrIntersectionTypeNode = UnionTypeNode | IntersectionTypeNode;
+
+    export interface UnionTypeNode extends TypeNode {
+        kind: SyntaxKind.UnionType;
         types: NodeArray<TypeNode>;
     }
 
-    // @kind(SyntaxKind.UnionType)
-    export interface UnionTypeNode extends UnionOrIntersectionTypeNode { }
-
-    // @kind(SyntaxKind.IntersectionType)
-    export interface IntersectionTypeNode extends UnionOrIntersectionTypeNode { }
+    export interface IntersectionTypeNode extends TypeNode {
+        kind: SyntaxKind.IntersectionType;
+        types: NodeArray<TypeNode>;
+    }
 
-    // @kind(SyntaxKind.ParenthesizedType)
     export interface ParenthesizedTypeNode extends TypeNode {
+        kind: SyntaxKind.ParenthesizedType;
+        type: TypeNode;
+    }
+
+    export interface TypeOperatorNode extends TypeNode {
+        kind: SyntaxKind.TypeOperator;
+        operator: SyntaxKind.KeyOfKeyword;
         type: TypeNode;
     }
 
-    // @kind(SyntaxKind.StringLiteralType)
+    export interface IndexedAccessTypeNode extends TypeNode {
+        kind: SyntaxKind.IndexedAccessType;
+        objectType: TypeNode;
+        indexType: TypeNode;
+    }
+
+    export interface MappedTypeNode extends TypeNode, Declaration {
+        kind: SyntaxKind.MappedType;
+        parent?: TypeAliasDeclaration;
+        readonlyToken?: ReadonlyToken;
+        typeParameter: TypeParameterDeclaration;
+        questionToken?: QuestionToken;
+        type?: TypeNode;
+    }
+
     export interface LiteralTypeNode extends TypeNode {
-        _stringLiteralTypeBrand: any;
+        kind: SyntaxKind.LiteralType;
         literal: Expression;
     }
 
-    // @kind(SyntaxKind.StringLiteral)
     export interface StringLiteral extends LiteralExpression {
-        _stringLiteralBrand: any;
-        /* @internal */
-        textSourceNode?: Identifier | StringLiteral; // Allows a StringLiteral to get its text from another node (used by transforms).
+        kind: SyntaxKind.StringLiteral;
+        /* @internal */ textSourceNode?: Identifier | StringLiteral | NumericLiteral; // Allows a StringLiteral to get its text from another node (used by transforms).
     }
 
     // Note: 'brands' in our syntax nodes serve to give us a small amount of nominal typing.
@@ -870,19 +997,16 @@ namespace ts {
 
     export interface Expression extends Node {
         _expressionBrand: any;
-        contextualType?: Type;  // Used to temporarily assign a contextual type during overload resolution
     }
 
-    // @kind(SyntaxKind.OmittedExpression)
     export interface OmittedExpression extends Expression {
-        _omittedExpressionBrand: any;
+        kind: SyntaxKind.OmittedExpression;
     }
 
     // Represents an expression that is elided as part of a transformation to emit comments on a
-    // not-emitted node. The 'expression' property of a NotEmittedExpression should be emitted.
-    // @internal
-    // @kind(SyntaxKind.NotEmittedExpression)
+    // not-emitted node. The 'expression' property of a PartiallyEmittedExpression should be emitted.
     export interface PartiallyEmittedExpression extends LeftHandSideExpression {
+        kind: SyntaxKind.PartiallyEmittedExpression;
         expression: Expression;
     }
 
@@ -890,27 +1014,41 @@ namespace ts {
         _unaryExpressionBrand: any;
     }
 
-    export interface IncrementExpression extends UnaryExpression {
-        _incrementExpressionBrand: any;
+    /** Deprecated, please use UpdateExpression */
+    export type IncrementExpression = UpdateExpression;
+    export interface UpdateExpression extends UnaryExpression {
+        _updateExpressionBrand: any;
     }
 
-    // @kind(SyntaxKind.PrefixUnaryExpression)
-    export interface PrefixUnaryExpression extends IncrementExpression {
-        operator: SyntaxKind;
+    // see: https://tc39.github.io/ecma262/#prod-UpdateExpression
+    // see: https://tc39.github.io/ecma262/#prod-UnaryExpression
+    export type PrefixUnaryOperator
+        = SyntaxKind.PlusPlusToken
+        | SyntaxKind.MinusMinusToken
+        | SyntaxKind.PlusToken
+        | SyntaxKind.MinusToken
+        | SyntaxKind.TildeToken
+        | SyntaxKind.ExclamationToken;
+
+    export interface PrefixUnaryExpression extends UpdateExpression {
+        kind: SyntaxKind.PrefixUnaryExpression;
+        operator: PrefixUnaryOperator;
         operand: UnaryExpression;
     }
 
-    // @kind(SyntaxKind.PostfixUnaryExpression)
-    export interface PostfixUnaryExpression extends IncrementExpression {
-        operand: LeftHandSideExpression;
-        operator: SyntaxKind;
-    }
+    // see: https://tc39.github.io/ecma262/#prod-UpdateExpression
+    export type PostfixUnaryOperator
+        = SyntaxKind.PlusPlusToken
+        | SyntaxKind.MinusMinusToken
+        ;
 
-    export interface PostfixExpression extends UnaryExpression {
-        _postfixExpressionBrand: any;
+    export interface PostfixUnaryExpression extends UpdateExpression {
+        kind: SyntaxKind.PostfixUnaryExpression;
+        operand: LeftHandSideExpression;
+        operator: PostfixUnaryOperator;
     }
 
-    export interface LeftHandSideExpression extends IncrementExpression {
+    export interface LeftHandSideExpression extends UpdateExpression {
         _leftHandSideExpressionBrand: any;
     }
 
@@ -918,270 +1056,554 @@ namespace ts {
         _memberExpressionBrand: any;
     }
 
-    // @kind(SyntaxKind.TrueKeyword)
-    // @kind(SyntaxKind.FalseKeyword)
-    // @kind(SyntaxKind.NullKeyword)
-    // @kind(SyntaxKind.ThisKeyword)
-    // @kind(SyntaxKind.SuperKeyword)
     export interface PrimaryExpression extends MemberExpression {
         _primaryExpressionBrand: any;
     }
 
-    // @kind(SyntaxKind.DeleteExpression)
+    export interface NullLiteral extends PrimaryExpression, TypeNode {
+        kind: SyntaxKind.NullKeyword;
+    }
+
+    export interface BooleanLiteral extends PrimaryExpression, TypeNode {
+        kind: SyntaxKind.TrueKeyword | SyntaxKind.FalseKeyword;
+    }
+
+    export interface ThisExpression extends PrimaryExpression, KeywordTypeNode {
+        kind: SyntaxKind.ThisKeyword;
+    }
+
+    export interface SuperExpression extends PrimaryExpression {
+        kind: SyntaxKind.SuperKeyword;
+    }
+
+    export interface ImportExpression extends PrimaryExpression {
+        kind: SyntaxKind.ImportKeyword;
+    }
+
     export interface DeleteExpression extends UnaryExpression {
+        kind: SyntaxKind.DeleteExpression;
         expression: UnaryExpression;
     }
 
-    // @kind(SyntaxKind.TypeOfExpression)
     export interface TypeOfExpression extends UnaryExpression {
+        kind: SyntaxKind.TypeOfExpression;
         expression: UnaryExpression;
     }
 
-    // @kind(SyntaxKind.VoidExpression)
     export interface VoidExpression extends UnaryExpression {
+        kind: SyntaxKind.VoidExpression;
         expression: UnaryExpression;
     }
 
-    // @kind(SyntaxKind.AwaitExpression)
     export interface AwaitExpression extends UnaryExpression {
+        kind: SyntaxKind.AwaitExpression;
         expression: UnaryExpression;
     }
 
-    // @kind(SyntaxKind.YieldExpression)
     export interface YieldExpression extends Expression {
-        asteriskToken?: Node;
+        kind: SyntaxKind.YieldExpression;
+        asteriskToken?: AsteriskToken;
         expression?: Expression;
     }
 
-    // @kind(SyntaxKind.BinaryExpression)
-    // Binary expressions can be declarations if they are 'exports.foo = bar' expressions in JS files
-    export interface BinaryExpression extends Expression, Declaration {
+    // see: https://tc39.github.io/ecma262/#prod-ExponentiationExpression
+    export type ExponentiationOperator
+        = SyntaxKind.AsteriskAsteriskToken
+        ;
+
+    // see: https://tc39.github.io/ecma262/#prod-MultiplicativeOperator
+    export type MultiplicativeOperator
+        = SyntaxKind.AsteriskToken
+        | SyntaxKind.SlashToken
+        | SyntaxKind.PercentToken
+        ;
+
+    // see: https://tc39.github.io/ecma262/#prod-MultiplicativeExpression
+    export type MultiplicativeOperatorOrHigher
+        = ExponentiationOperator
+        | MultiplicativeOperator
+        ;
+
+    // see: https://tc39.github.io/ecma262/#prod-AdditiveExpression
+    export type AdditiveOperator
+        = SyntaxKind.PlusToken
+        | SyntaxKind.MinusToken
+        ;
+
+    // see: https://tc39.github.io/ecma262/#prod-AdditiveExpression
+    export type AdditiveOperatorOrHigher
+        = MultiplicativeOperatorOrHigher
+        | AdditiveOperator
+        ;
+
+    // see: https://tc39.github.io/ecma262/#prod-ShiftExpression
+    export type ShiftOperator
+        = SyntaxKind.LessThanLessThanToken
+        | SyntaxKind.GreaterThanGreaterThanToken
+        | SyntaxKind.GreaterThanGreaterThanGreaterThanToken
+        ;
+
+    // see: https://tc39.github.io/ecma262/#prod-ShiftExpression
+    export type ShiftOperatorOrHigher
+        = AdditiveOperatorOrHigher
+        | ShiftOperator
+        ;
+
+    // see: https://tc39.github.io/ecma262/#prod-RelationalExpression
+    export type RelationalOperator
+        = SyntaxKind.LessThanToken
+        | SyntaxKind.LessThanEqualsToken
+        | SyntaxKind.GreaterThanToken
+        | SyntaxKind.GreaterThanEqualsToken
+        | SyntaxKind.InstanceOfKeyword
+        | SyntaxKind.InKeyword
+        ;
+
+    // see: https://tc39.github.io/ecma262/#prod-RelationalExpression
+    export type RelationalOperatorOrHigher
+        = ShiftOperatorOrHigher
+        | RelationalOperator
+        ;
+
+    // see: https://tc39.github.io/ecma262/#prod-EqualityExpression
+    export type EqualityOperator
+        = SyntaxKind.EqualsEqualsToken
+        | SyntaxKind.EqualsEqualsEqualsToken
+        | SyntaxKind.ExclamationEqualsEqualsToken
+        | SyntaxKind.ExclamationEqualsToken
+        ;
+
+    // see: https://tc39.github.io/ecma262/#prod-EqualityExpression
+    export type EqualityOperatorOrHigher
+        = RelationalOperatorOrHigher
+        | EqualityOperator;
+
+    // see: https://tc39.github.io/ecma262/#prod-BitwiseANDExpression
+    // see: https://tc39.github.io/ecma262/#prod-BitwiseXORExpression
+    // see: https://tc39.github.io/ecma262/#prod-BitwiseORExpression
+    export type BitwiseOperator
+        = SyntaxKind.AmpersandToken
+        | SyntaxKind.BarToken
+        | SyntaxKind.CaretToken
+        ;
+
+    // see: https://tc39.github.io/ecma262/#prod-BitwiseANDExpression
+    // see: https://tc39.github.io/ecma262/#prod-BitwiseXORExpression
+    // see: https://tc39.github.io/ecma262/#prod-BitwiseORExpression
+    export type BitwiseOperatorOrHigher
+        = EqualityOperatorOrHigher
+        | BitwiseOperator
+        ;
+
+    // see: https://tc39.github.io/ecma262/#prod-LogicalANDExpression
+    // see: https://tc39.github.io/ecma262/#prod-LogicalORExpression
+    export type LogicalOperator
+        = SyntaxKind.AmpersandAmpersandToken
+        | SyntaxKind.BarBarToken
+        ;
+
+    // see: https://tc39.github.io/ecma262/#prod-LogicalANDExpression
+    // see: https://tc39.github.io/ecma262/#prod-LogicalORExpression
+    export type LogicalOperatorOrHigher
+        = BitwiseOperatorOrHigher
+        | LogicalOperator
+        ;
+
+    // see: https://tc39.github.io/ecma262/#prod-AssignmentOperator
+    export type CompoundAssignmentOperator
+        = SyntaxKind.PlusEqualsToken
+        | SyntaxKind.MinusEqualsToken
+        | SyntaxKind.AsteriskAsteriskEqualsToken
+        | SyntaxKind.AsteriskEqualsToken
+        | SyntaxKind.SlashEqualsToken
+        | SyntaxKind.PercentEqualsToken
+        | SyntaxKind.AmpersandEqualsToken
+        | SyntaxKind.BarEqualsToken
+        | SyntaxKind.CaretEqualsToken
+        | SyntaxKind.LessThanLessThanEqualsToken
+        | SyntaxKind.GreaterThanGreaterThanGreaterThanEqualsToken
+        | SyntaxKind.GreaterThanGreaterThanEqualsToken
+        ;
+
+    // see: https://tc39.github.io/ecma262/#prod-AssignmentExpression
+    export type AssignmentOperator
+        = SyntaxKind.EqualsToken
+        | CompoundAssignmentOperator
+        ;
+
+    // see: https://tc39.github.io/ecma262/#prod-AssignmentExpression
+    export type AssignmentOperatorOrHigher
+        = LogicalOperatorOrHigher
+        | AssignmentOperator
+        ;
+
+    // see: https://tc39.github.io/ecma262/#prod-Expression
+    export type BinaryOperator
+        = AssignmentOperatorOrHigher
+        | SyntaxKind.CommaToken
+        ;
+
+    export type BinaryOperatorToken = Token<BinaryOperator>;
+
+    export interface BinaryExpression extends Expression, Declaration  {
+        kind: SyntaxKind.BinaryExpression;
         left: Expression;
-        operatorToken: Node;
+        operatorToken: BinaryOperatorToken;
         right: Expression;
     }
 
-    // @kind(SyntaxKind.ConditionalExpression)
+    export type AssignmentOperatorToken = Token<AssignmentOperator>;
+
+    export interface AssignmentExpression<TOperator extends AssignmentOperatorToken> extends BinaryExpression {
+        left: LeftHandSideExpression;
+        operatorToken: TOperator;
+    }
+
+    export interface ObjectDestructuringAssignment extends AssignmentExpression<EqualsToken> {
+        left: ObjectLiteralExpression;
+    }
+
+    export interface ArrayDestructuringAssignment extends AssignmentExpression<EqualsToken> {
+        left: ArrayLiteralExpression;
+    }
+
+    export type DestructuringAssignment
+        = ObjectDestructuringAssignment
+        | ArrayDestructuringAssignment
+        ;
+
+    export type BindingOrAssignmentElement
+        = VariableDeclaration
+        | ParameterDeclaration
+        | BindingElement
+        | PropertyAssignment // AssignmentProperty
+        | ShorthandPropertyAssignment // AssignmentProperty
+        | SpreadAssignment // AssignmentRestProperty
+        | OmittedExpression // Elision
+        | SpreadElement // AssignmentRestElement
+        | ArrayLiteralExpression // ArrayAssignmentPattern
+        | ObjectLiteralExpression // ObjectAssignmentPattern
+        | AssignmentExpression<EqualsToken> // AssignmentElement
+        | Identifier // DestructuringAssignmentTarget
+        | PropertyAccessExpression // DestructuringAssignmentTarget
+        | ElementAccessExpression // DestructuringAssignmentTarget
+        ;
+
+    export type BindingOrAssignmentElementRestIndicator
+        = DotDotDotToken // from BindingElement
+        | SpreadElement // AssignmentRestElement
+        | SpreadAssignment // AssignmentRestProperty
+        ;
+
+    export type BindingOrAssignmentElementTarget = BindingOrAssignmentPattern | Expression;
+
+    export type ObjectBindingOrAssignmentPattern
+        = ObjectBindingPattern
+        | ObjectLiteralExpression // ObjectAssignmentPattern
+        ;
+
+    export type ArrayBindingOrAssignmentPattern
+        = ArrayBindingPattern
+        | ArrayLiteralExpression // ArrayAssignmentPattern
+        ;
+
+    export type AssignmentPattern = ObjectLiteralExpression | ArrayLiteralExpression;
+
+    export type BindingOrAssignmentPattern = ObjectBindingOrAssignmentPattern | ArrayBindingOrAssignmentPattern;
+
     export interface ConditionalExpression extends Expression {
+        kind: SyntaxKind.ConditionalExpression;
         condition: Expression;
-        questionToken: Node;
+        questionToken: QuestionToken;
         whenTrue: Expression;
-        colonToken: Node;
+        colonToken: ColonToken;
         whenFalse: Expression;
     }
 
     export type FunctionBody = Block;
     export type ConciseBody = FunctionBody | Expression;
 
-    // @kind(SyntaxKind.FunctionExpression)
     export interface FunctionExpression extends PrimaryExpression, FunctionLikeDeclaration {
+        kind: SyntaxKind.FunctionExpression;
         name?: Identifier;
         body: FunctionBody;  // Required, whereas the member inherited from FunctionDeclaration is optional
     }
 
-    // @kind(SyntaxKind.ArrowFunction)
     export interface ArrowFunction extends Expression, FunctionLikeDeclaration {
-        equalsGreaterThanToken: Node;
+        kind: SyntaxKind.ArrowFunction;
+        equalsGreaterThanToken: EqualsGreaterThanToken;
         body: ConciseBody;
     }
 
+    // The text property of a LiteralExpression stores the interpreted value of the literal in text form. For a StringLiteral,
+    // or any literal of a template, this means quotes have been removed and escapes have been converted to actual characters.
+    // For a NumericLiteral, the stored value is the toString() representation of the number. For example 1, 1.00, and 1e0 are all stored as just "1".
     export interface LiteralLikeNode extends Node {
         text: string;
         isUnterminated?: boolean;
         hasExtendedUnicodeEscape?: boolean;
-        /* @internal */
-        isOctalLiteral?: boolean;
     }
 
     // The text property of a LiteralExpression stores the interpreted value of the literal in text form. For a StringLiteral,
     // or any literal of a template, this means quotes have been removed and escapes have been converted to actual characters.
     // For a NumericLiteral, the stored value is the toString() representation of the number. For example 1, 1.00, and 1e0 are all stored as just "1".
-    // @kind(SyntaxKind.RegularExpressionLiteral)
-    // @kind(SyntaxKind.NoSubstitutionTemplateLiteral)
     export interface LiteralExpression extends LiteralLikeNode, PrimaryExpression {
         _literalExpressionBrand: any;
     }
 
-    // @kind(SyntaxKind.NumericLiteral)
+    export interface RegularExpressionLiteral extends LiteralExpression {
+        kind: SyntaxKind.RegularExpressionLiteral;
+    }
+
+    export interface NoSubstitutionTemplateLiteral extends LiteralExpression {
+        kind: SyntaxKind.NoSubstitutionTemplateLiteral;
+    }
+
+    /* @internal */
+    export const enum NumericLiteralFlags {
+        None = 0,
+        Scientific = 1 << 1,        // e.g. `10e2`
+        Octal = 1 << 2,             // e.g. `0777`
+        HexSpecifier = 1 << 3,      // e.g. `0x00000000`
+        BinarySpecifier = 1 << 4,   // e.g. `0b0110010000000000`
+        OctalSpecifier = 1 << 5,    // e.g. `0o777`
+        BinaryOrOctalSpecifier = BinarySpecifier | OctalSpecifier,
+    }
+
     export interface NumericLiteral extends LiteralExpression {
-        _numericLiteralBrand: any;
-        trailingComment?: string;
+        kind: SyntaxKind.NumericLiteral;
+        /* @internal */
+        numericLiteralFlags?: NumericLiteralFlags;
     }
 
-    // @kind(SyntaxKind.TemplateHead)
-    // @kind(SyntaxKind.TemplateMiddle)
-    // @kind(SyntaxKind.TemplateTail)
-    export interface TemplateLiteralFragment extends LiteralLikeNode {
-        _templateLiteralFragmentBrand: any;
+    export interface TemplateHead extends LiteralLikeNode {
+        kind: SyntaxKind.TemplateHead;
+        parent?: TemplateExpression;
     }
 
-    export type Template = TemplateExpression | LiteralExpression;
+    export interface TemplateMiddle extends LiteralLikeNode {
+        kind: SyntaxKind.TemplateMiddle;
+        parent?: TemplateSpan;
+    }
+
+    export interface TemplateTail extends LiteralLikeNode {
+        kind: SyntaxKind.TemplateTail;
+        parent?: TemplateSpan;
+    }
+
+    export type TemplateLiteral = TemplateExpression | NoSubstitutionTemplateLiteral;
 
-    // @kind(SyntaxKind.TemplateExpression)
     export interface TemplateExpression extends PrimaryExpression {
-        head: TemplateLiteralFragment;
+        kind: SyntaxKind.TemplateExpression;
+        head: TemplateHead;
         templateSpans: NodeArray<TemplateSpan>;
     }
 
     // Each of these corresponds to a substitution expression and a template literal, in that order.
     // The template literal must have kind TemplateMiddleLiteral or TemplateTailLiteral.
-    // @kind(SyntaxKind.TemplateSpan)
     export interface TemplateSpan extends Node {
+        kind: SyntaxKind.TemplateSpan;
+        parent?: TemplateExpression;
         expression: Expression;
-        literal: TemplateLiteralFragment;
+        literal: TemplateMiddle | TemplateTail;
     }
 
-    // @kind(SyntaxKind.ParenthesizedExpression)
     export interface ParenthesizedExpression extends PrimaryExpression {
+        kind: SyntaxKind.ParenthesizedExpression;
         expression: Expression;
     }
 
-    // @kind(SyntaxKind.ArrayLiteralExpression)
     export interface ArrayLiteralExpression extends PrimaryExpression {
+        kind: SyntaxKind.ArrayLiteralExpression;
         elements: NodeArray<Expression>;
         /* @internal */
         multiLine?: boolean;
     }
 
-    // @kind(SyntaxKind.SpreadElementExpression)
-    export interface SpreadElementExpression extends Expression {
+    export interface SpreadElement extends Expression {
+        kind: SyntaxKind.SpreadElement;
         expression: Expression;
     }
 
     /**
-      * This interface is a base interface for ObjectLiteralExpression and JSXAttributes to extend from. JSXAttributes is similar to
-      * ObjectLiteralExpression in that it contains array of properties; however, JSXAttributes' properties can only be
-      * JSXAttribute or JSXSpreadAttribute. ObjectLiteralExpression, on the other hand, can only have properties of type
-      * ObjectLiteralElement (e.g. PropertyAssignment, ShorthandPropertyAssignment etc.)
-     **/
+     * This interface is a base interface for ObjectLiteralExpression and JSXAttributes to extend from. JSXAttributes is similar to
+     * ObjectLiteralExpression in that it contains array of properties; however, JSXAttributes' properties can only be
+     * JSXAttribute or JSXSpreadAttribute. ObjectLiteralExpression, on the other hand, can only have properties of type
+     * ObjectLiteralElement (e.g. PropertyAssignment, ShorthandPropertyAssignment etc.)
+     */
     export interface ObjectLiteralExpressionBase<T extends ObjectLiteralElement> extends PrimaryExpression, Declaration {
         properties: NodeArray<T>;
     }
 
     // An ObjectLiteralExpression is the declaration node for an anonymous symbol.
-    // @kind(SyntaxKind.ObjectLiteralExpression)
     export interface ObjectLiteralExpression extends ObjectLiteralExpressionBase<ObjectLiteralElementLike> {
+        kind: SyntaxKind.ObjectLiteralExpression;
         /* @internal */
         multiLine?: boolean;
     }
 
-    export type EntityNameExpression = Identifier | PropertyAccessEntityNameExpression;
+    export type EntityNameExpression = Identifier | PropertyAccessEntityNameExpression | ParenthesizedExpression;
     export type EntityNameOrEntityNameExpression = EntityName | EntityNameExpression;
 
-    // @kind(SyntaxKind.PropertyAccessExpression)
-    export interface PropertyAccessExpression extends MemberExpression, Declaration {
+    export interface PropertyAccessExpression extends MemberExpression, NamedDeclaration {
+        kind: SyntaxKind.PropertyAccessExpression;
         expression: LeftHandSideExpression;
         name: Identifier;
     }
+
+    export interface SuperPropertyAccessExpression extends PropertyAccessExpression {
+        expression: SuperExpression;
+    }
+
     /** Brand for a PropertyAccessExpression which, like a QualifiedName, consists of a sequence of identifiers separated by dots. */
     export interface PropertyAccessEntityNameExpression extends PropertyAccessExpression {
         _propertyAccessExpressionLikeQualifiedNameBrand?: any;
         expression: EntityNameExpression;
     }
 
-    // @kind(SyntaxKind.ElementAccessExpression)
     export interface ElementAccessExpression extends MemberExpression {
+        kind: SyntaxKind.ElementAccessExpression;
         expression: LeftHandSideExpression;
         argumentExpression?: Expression;
     }
 
-    // @kind(SyntaxKind.CallExpression)
+    export interface SuperElementAccessExpression extends ElementAccessExpression {
+        expression: SuperExpression;
+    }
+
+    // see: https://tc39.github.io/ecma262/#prod-SuperProperty
+    export type SuperProperty = SuperPropertyAccessExpression | SuperElementAccessExpression;
+
     export interface CallExpression extends LeftHandSideExpression, Declaration {
+        kind: SyntaxKind.CallExpression;
         expression: LeftHandSideExpression;
         typeArguments?: NodeArray<TypeNode>;
         arguments: NodeArray<Expression>;
     }
 
-    // @kind(SyntaxKind.ExpressionWithTypeArguments)
+    // see: https://tc39.github.io/ecma262/#prod-SuperCall
+    export interface SuperCall extends CallExpression {
+        expression: SuperExpression;
+    }
+
+    export interface ImportCall extends CallExpression {
+        expression: ImportExpression;
+    }
+
     export interface ExpressionWithTypeArguments extends TypeNode {
+        kind: SyntaxKind.ExpressionWithTypeArguments;
+        parent?: HeritageClause;
         expression: LeftHandSideExpression;
         typeArguments?: NodeArray<TypeNode>;
     }
 
-    // @kind(SyntaxKind.NewExpression)
-    export interface NewExpression extends CallExpression, PrimaryExpression { }
+    export interface NewExpression extends PrimaryExpression, Declaration {
+        kind: SyntaxKind.NewExpression;
+        expression: LeftHandSideExpression;
+        typeArguments?: NodeArray<TypeNode>;
+        arguments?: NodeArray<Expression>;
+    }
 
-    // @kind(SyntaxKind.TaggedTemplateExpression)
     export interface TaggedTemplateExpression extends MemberExpression {
+        kind: SyntaxKind.TaggedTemplateExpression;
         tag: LeftHandSideExpression;
-        template: Template;
+        template: TemplateLiteral;
     }
 
-    export type CallLikeExpression = CallExpression | NewExpression | TaggedTemplateExpression | Decorator;
+    export type CallLikeExpression = CallExpression | NewExpression | TaggedTemplateExpression | Decorator | JsxOpeningLikeElement;
 
-    // @kind(SyntaxKind.AsExpression)
     export interface AsExpression extends Expression {
+        kind: SyntaxKind.AsExpression;
         expression: Expression;
         type: TypeNode;
     }
 
-    // @kind(SyntaxKind.TypeAssertionExpression)
     export interface TypeAssertion extends UnaryExpression {
+        kind: SyntaxKind.TypeAssertionExpression;
         type: TypeNode;
         expression: UnaryExpression;
     }
 
     export type AssertionExpression = TypeAssertion | AsExpression;
 
-    // @kind(SyntaxKind.NonNullExpression)
     export interface NonNullExpression extends LeftHandSideExpression {
+        kind: SyntaxKind.NonNullExpression;
         expression: Expression;
     }
 
+    // NOTE: MetaProperty is really a MemberExpression, but we consider it a PrimaryExpression
+    //       for the same reasons we treat NewExpression as a PrimaryExpression.
+    export interface MetaProperty extends PrimaryExpression {
+        kind: SyntaxKind.MetaProperty;
+        keywordToken: SyntaxKind.NewKeyword;
+        name: Identifier;
+    }
+
     /// A JSX expression of the form <TagName attrs>...</TagName>
-    // @kind(SyntaxKind.JsxElement)
     export interface JsxElement extends PrimaryExpression {
+        kind: SyntaxKind.JsxElement;
         openingElement: JsxOpeningElement;
         children: NodeArray<JsxChild>;
         closingElement: JsxClosingElement;
     }
 
+    /// Either the opening tag in a <Tag>...</Tag> pair, or the lone <Tag /> in a self-closing form
+    export type JsxOpeningLikeElement = JsxSelfClosingElement | JsxOpeningElement;
+
+    export type JsxAttributeLike = JsxAttribute | JsxSpreadAttribute;
+
     export type JsxTagNameExpression = PrimaryExpression | PropertyAccessExpression;
 
+    export interface JsxAttributes extends ObjectLiteralExpressionBase<JsxAttributeLike> {
+        parent?: JsxOpeningLikeElement;
+    }
+
     /// The opening element of a <Tag>...</Tag> JsxElement
-    // @kind(SyntaxKind.JsxOpeningElement)
     export interface JsxOpeningElement extends Expression {
-        _openingElementBrand?: any;
+        kind: SyntaxKind.JsxOpeningElement;
+        parent?: JsxElement;
         tagName: JsxTagNameExpression;
-        attributes: NodeArray<JsxAttribute | JsxSpreadAttribute>;
+        attributes: JsxAttributes;
     }
 
     /// A JSX expression of the form <TagName attrs />
-    // @kind(SyntaxKind.JsxSelfClosingElement)
-    export interface JsxSelfClosingElement extends PrimaryExpression, JsxOpeningElement {
-        _selfClosingElementBrand?: any;
+    export interface JsxSelfClosingElement extends PrimaryExpression {
+        kind: SyntaxKind.JsxSelfClosingElement;
+        tagName: JsxTagNameExpression;
+        attributes: JsxAttributes;
     }
 
-    /// Either the opening tag in a <Tag>...</Tag> pair, or the lone <Tag /> in a self-closing form
-    export type JsxOpeningLikeElement = JsxSelfClosingElement | JsxOpeningElement;
-
-    export type JsxAttributeLike = JsxAttribute | JsxSpreadAttribute;
-
-    // @kind(SyntaxKind.JsxAttribute)
-    export interface JsxAttribute extends Node {
+    export interface JsxAttribute extends ObjectLiteralElement {
+        kind: SyntaxKind.JsxAttribute;
+        parent?: JsxAttributes;
         name: Identifier;
         /// JSX attribute initializers are optional; <X y /> is sugar for <X y={true} />
         initializer?: StringLiteral | JsxExpression;
     }
 
-    // @kind(SyntaxKind.JsxSpreadAttribute)
-    export interface JsxSpreadAttribute extends Node {
+    export interface JsxSpreadAttribute extends ObjectLiteralElement {
+        kind: SyntaxKind.JsxSpreadAttribute;
+        parent?: JsxAttributes;
         expression: Expression;
     }
 
-    // @kind(SyntaxKind.JsxClosingElement)
     export interface JsxClosingElement extends Node {
+        kind: SyntaxKind.JsxClosingElement;
+        parent?: JsxElement;
         tagName: JsxTagNameExpression;
     }
 
-    // @kind(SyntaxKind.JsxExpression)
     export interface JsxExpression extends Expression {
+        kind: SyntaxKind.JsxExpression;
+        parent?: JsxElement | JsxAttributeLike;
+        dotDotDotToken?: Token<SyntaxKind.DotDotDotToken>;
         expression?: Expression;
     }
 
-    // @kind(SyntaxKind.JsxText)
     export interface JsxText extends Node {
-        _jsxTextExpressionBrand: any;
+        kind: SyntaxKind.JsxText;
+        containsOnlyWhiteSpaces: boolean;
+        parent?: JsxElement;
     }
 
     export type JsxChild = JsxText | JsxExpression | JsxElement | JsxSelfClosingElement;
@@ -1192,42 +1614,72 @@ namespace ts {
 
     // Represents a statement that is elided as part of a transformation to emit comments on a
     // not-emitted node.
-    // @internal
-    // @kind(SyntaxKind.NotEmittedStatement)
     export interface NotEmittedStatement extends Statement {
+        kind: SyntaxKind.NotEmittedStatement;
     }
 
-    // @kind(SyntaxKind.EmptyStatement)
-    export interface EmptyStatement extends Statement { }
+    /**
+     * Marks the end of transformed declaration to properly emit exports.
+     */
+    /* @internal */
+    export interface EndOfDeclarationMarker extends Statement {
+        kind: SyntaxKind.EndOfDeclarationMarker;
+    }
+
+    /**
+     * A list of comma-seperated expressions. This node is only created by transformations.
+     */
+    export interface CommaListExpression extends Expression {
+        kind: SyntaxKind.CommaListExpression;
+        elements: NodeArray<Expression>;
+    }
 
-    // @kind(SyntaxKind.DebuggerStatement)
-    export interface DebuggerStatement extends Statement { }
+    /**
+     * Marks the beginning of a merged transformed declaration.
+     */
+    /* @internal */
+    export interface MergeDeclarationMarker extends Statement {
+        kind: SyntaxKind.MergeDeclarationMarker;
+    }
+
+    export interface EmptyStatement extends Statement {
+        kind: SyntaxKind.EmptyStatement;
+    }
+
+    export interface DebuggerStatement extends Statement {
+        kind: SyntaxKind.DebuggerStatement;
+    }
 
-    // @kind(SyntaxKind.MissingDeclaration)
     export interface MissingDeclaration extends DeclarationStatement, ClassElement, ObjectLiteralElement, TypeElement {
+        kind: SyntaxKind.MissingDeclaration;
         name?: Identifier;
     }
 
-    export type BlockLike = SourceFile | Block | ModuleBlock | CaseClause;
+    export type BlockLike = SourceFile | Block | ModuleBlock | CaseOrDefaultClause;
 
-    // @kind(SyntaxKind.Block)
     export interface Block extends Statement {
+        kind: SyntaxKind.Block;
         statements: NodeArray<Statement>;
         /*@internal*/ multiLine?: boolean;
     }
 
-    // @kind(SyntaxKind.VariableStatement)
     export interface VariableStatement extends Statement {
+        kind: SyntaxKind.VariableStatement;
         declarationList: VariableDeclarationList;
     }
 
-    // @kind(SyntaxKind.ExpressionStatement)
     export interface ExpressionStatement extends Statement {
+        kind: SyntaxKind.ExpressionStatement;
         expression: Expression;
     }
 
-    // @kind(SyntaxKind.IfStatement)
+    /* @internal */
+    export interface PrologueDirective extends ExpressionStatement {
+        expression: StringLiteral;
+    }
+
     export interface IfStatement extends Statement {
+        kind: SyntaxKind.IfStatement;
         expression: Expression;
         thenStatement: Statement;
         elseStatement?: Statement;
@@ -1237,192 +1689,223 @@ namespace ts {
         statement: Statement;
     }
 
-    // @kind(SyntaxKind.DoStatement)
     export interface DoStatement extends IterationStatement {
+        kind: SyntaxKind.DoStatement;
         expression: Expression;
     }
 
-    // @kind(SyntaxKind.WhileStatement)
     export interface WhileStatement extends IterationStatement {
+        kind: SyntaxKind.WhileStatement;
         expression: Expression;
     }
 
     export type ForInitializer = VariableDeclarationList | Expression;
 
-    // @kind(SyntaxKind.ForStatement)
     export interface ForStatement extends IterationStatement {
+        kind: SyntaxKind.ForStatement;
         initializer?: ForInitializer;
         condition?: Expression;
         incrementor?: Expression;
     }
 
-    // @kind(SyntaxKind.ForInStatement)
+    export type ForInOrOfStatement = ForInStatement | ForOfStatement;
+
     export interface ForInStatement extends IterationStatement {
+        kind: SyntaxKind.ForInStatement;
         initializer: ForInitializer;
         expression: Expression;
     }
 
-    // @kind(SyntaxKind.ForOfStatement)
     export interface ForOfStatement extends IterationStatement {
+        kind: SyntaxKind.ForOfStatement;
+        awaitModifier?: AwaitKeywordToken;
         initializer: ForInitializer;
         expression: Expression;
     }
 
-    // @kind(SyntaxKind.BreakStatement)
     export interface BreakStatement extends Statement {
+        kind: SyntaxKind.BreakStatement;
         label?: Identifier;
     }
 
-    // @kind(SyntaxKind.ContinueStatement)
     export interface ContinueStatement extends Statement {
+        kind: SyntaxKind.ContinueStatement;
         label?: Identifier;
     }
 
     export type BreakOrContinueStatement = BreakStatement | ContinueStatement;
 
-    // @kind(SyntaxKind.ReturnStatement)
     export interface ReturnStatement extends Statement {
+        kind: SyntaxKind.ReturnStatement;
         expression?: Expression;
     }
 
-    // @kind(SyntaxKind.WithStatement)
     export interface WithStatement extends Statement {
+        kind: SyntaxKind.WithStatement;
         expression: Expression;
         statement: Statement;
     }
 
-    // @kind(SyntaxKind.SwitchStatement)
     export interface SwitchStatement extends Statement {
+        kind: SyntaxKind.SwitchStatement;
         expression: Expression;
         caseBlock: CaseBlock;
         possiblyExhaustive?: boolean;
     }
 
-    // @kind(SyntaxKind.CaseBlock)
     export interface CaseBlock extends Node {
+        kind: SyntaxKind.CaseBlock;
+        parent?: SwitchStatement;
         clauses: NodeArray<CaseOrDefaultClause>;
     }
 
-    // @kind(SyntaxKind.CaseClause)
     export interface CaseClause extends Node {
+        kind: SyntaxKind.CaseClause;
+        parent?: CaseBlock;
         expression: Expression;
         statements: NodeArray<Statement>;
     }
 
-    // @kind(SyntaxKind.DefaultClause)
     export interface DefaultClause extends Node {
+        kind: SyntaxKind.DefaultClause;
+        parent?: CaseBlock;
         statements: NodeArray<Statement>;
     }
 
     export type CaseOrDefaultClause = CaseClause | DefaultClause;
 
-    // @kind(SyntaxKind.LabeledStatement)
     export interface LabeledStatement extends Statement {
+        kind: SyntaxKind.LabeledStatement;
         label: Identifier;
         statement: Statement;
     }
 
-    // @kind(SyntaxKind.ThrowStatement)
     export interface ThrowStatement extends Statement {
+        kind: SyntaxKind.ThrowStatement;
         expression: Expression;
     }
 
-    // @kind(SyntaxKind.TryStatement)
     export interface TryStatement extends Statement {
+        kind: SyntaxKind.TryStatement;
         tryBlock: Block;
         catchClause?: CatchClause;
         finallyBlock?: Block;
     }
 
-    // @kind(SyntaxKind.CatchClause)
     export interface CatchClause extends Node {
+        kind: SyntaxKind.CatchClause;
+        parent?: TryStatement;
         variableDeclaration: VariableDeclaration;
         block: Block;
     }
 
-    export type DeclarationWithTypeParameters = SignatureDeclaration | ClassLikeDeclaration | InterfaceDeclaration | TypeAliasDeclaration;
+    export type DeclarationWithTypeParameters = SignatureDeclaration | ClassLikeDeclaration | InterfaceDeclaration | TypeAliasDeclaration | JSDocTemplateTag;
 
-    export interface ClassLikeDeclaration extends Declaration {
+    export interface ClassLikeDeclaration extends NamedDeclaration {
         name?: Identifier;
         typeParameters?: NodeArray<TypeParameterDeclaration>;
         heritageClauses?: NodeArray<HeritageClause>;
         members: NodeArray<ClassElement>;
     }
 
-    // @kind(SyntaxKind.ClassDeclaration)
     export interface ClassDeclaration extends ClassLikeDeclaration, DeclarationStatement {
+        kind: SyntaxKind.ClassDeclaration;
         name?: Identifier;
     }
 
-    // @kind(SyntaxKind.ClassExpression)
     export interface ClassExpression extends ClassLikeDeclaration, PrimaryExpression {
+        kind: SyntaxKind.ClassExpression;
     }
 
-    export interface ClassElement extends Declaration {
+    export interface ClassElement extends NamedDeclaration {
         _classElementBrand: any;
         name?: PropertyName;
     }
 
-    export interface TypeElement extends Declaration {
+    export interface TypeElement extends NamedDeclaration {
         _typeElementBrand: any;
         name?: PropertyName;
-        questionToken?: Node;
+        questionToken?: QuestionToken;
     }
 
-    // @kind(SyntaxKind.InterfaceDeclaration)
     export interface InterfaceDeclaration extends DeclarationStatement {
+        kind: SyntaxKind.InterfaceDeclaration;
         name: Identifier;
         typeParameters?: NodeArray<TypeParameterDeclaration>;
         heritageClauses?: NodeArray<HeritageClause>;
         members: NodeArray<TypeElement>;
     }
 
-    // @kind(SyntaxKind.HeritageClause)
     export interface HeritageClause extends Node {
-        token: SyntaxKind;
-        types?: NodeArray<ExpressionWithTypeArguments>;
+        kind: SyntaxKind.HeritageClause;
+        parent?: InterfaceDeclaration | ClassDeclaration | ClassExpression;
+        token: SyntaxKind.ExtendsKeyword | SyntaxKind.ImplementsKeyword;
+        types: NodeArray<ExpressionWithTypeArguments>;
     }
 
-    // @kind(SyntaxKind.TypeAliasDeclaration)
     export interface TypeAliasDeclaration extends DeclarationStatement {
+        kind: SyntaxKind.TypeAliasDeclaration;
         name: Identifier;
         typeParameters?: NodeArray<TypeParameterDeclaration>;
         type: TypeNode;
     }
 
-    // @kind(SyntaxKind.EnumMember)
-    export interface EnumMember extends Declaration {
+    export interface EnumMember extends NamedDeclaration {
+        kind: SyntaxKind.EnumMember;
+        parent?: EnumDeclaration;
         // This does include ComputedPropertyName, but the parser will give an error
         // if it parses a ComputedPropertyName in an EnumMember
         name: PropertyName;
         initializer?: Expression;
     }
 
-    // @kind(SyntaxKind.EnumDeclaration)
     export interface EnumDeclaration extends DeclarationStatement {
+        kind: SyntaxKind.EnumDeclaration;
         name: Identifier;
         members: NodeArray<EnumMember>;
     }
 
-    export type ModuleBody = ModuleBlock | ModuleDeclaration;
-
     export type ModuleName = Identifier | StringLiteral;
 
-    // @kind(SyntaxKind.ModuleDeclaration)
+    export type ModuleBody = NamespaceBody | JSDocNamespaceBody;
+
     export interface ModuleDeclaration extends DeclarationStatement {
-        name: Identifier | LiteralExpression;
-        body?: ModuleBlock | ModuleDeclaration;
+        kind: SyntaxKind.ModuleDeclaration;
+        parent?: ModuleBody | SourceFile;
+        name: ModuleName;
+        body?: ModuleBody | JSDocNamespaceDeclaration;
+    }
+
+    export type NamespaceBody = ModuleBlock | NamespaceDeclaration;
+
+    export interface NamespaceDeclaration extends ModuleDeclaration {
+        name: Identifier;
+        body: NamespaceBody;
+    }
+
+    export type JSDocNamespaceBody = Identifier | JSDocNamespaceDeclaration;
+
+    export interface JSDocNamespaceDeclaration extends ModuleDeclaration {
+        name: Identifier;
+        body: JSDocNamespaceBody;
     }
 
-    // @kind(SyntaxKind.ModuleBlock)
     export interface ModuleBlock extends Node, Statement {
+        kind: SyntaxKind.ModuleBlock;
+        parent?: ModuleDeclaration;
         statements: NodeArray<Statement>;
     }
 
     export type ModuleReference = EntityName | ExternalModuleReference;
 
-    // @kind(SyntaxKind.ImportEqualsDeclaration)
+    /**
+     * One of:
+     * - import x = require("mod");
+     * - import x = M.x;
+     */
     export interface ImportEqualsDeclaration extends DeclarationStatement {
+        kind: SyntaxKind.ImportEqualsDeclaration;
+        parent?: SourceFile | ModuleBlock;
         name: Identifier;
 
         // 'EntityName' for an internal module reference, 'ExternalModuleReference' for an external
@@ -1430,8 +1913,9 @@ namespace ts {
         moduleReference: ModuleReference;
     }
 
-    // @kind(SyntaxKind.ExternalModuleReference)
     export interface ExternalModuleReference extends Node {
+        kind: SyntaxKind.ExternalModuleReference;
+        parent?: ImportEqualsDeclaration;
         expression?: Expression;
     }
 
@@ -1439,9 +1923,11 @@ namespace ts {
     // import "mod"  => importClause = undefined, moduleSpecifier = "mod"
     // In rest of the cases, module specifier is string literal corresponding to module
     // ImportClause information is shown at its declaration below.
-    // @kind(SyntaxKind.ImportDeclaration)
     export interface ImportDeclaration extends Statement {
+        kind: SyntaxKind.ImportDeclaration;
+        parent?: SourceFile | ModuleBlock;
         importClause?: ImportClause;
+        /** If this is not a StringLiteral it will be a grammar error. */
         moduleSpecifier: Expression;
     }
 
@@ -1453,57 +1939,65 @@ namespace ts {
     // import d, * as ns from "mod" => name = d, namedBinding: NamespaceImport = { name: ns }
     // import { a, b as x } from "mod" => name = undefined, namedBinding: NamedImports = { elements: [{ name: a }, { name: x, propertyName: b}]}
     // import d, { a, b as x } from "mod" => name = d, namedBinding: NamedImports = { elements: [{ name: a }, { name: x, propertyName: b}]}
-    // @kind(SyntaxKind.ImportClause)
-    export interface ImportClause extends Declaration {
+    export interface ImportClause extends NamedDeclaration {
+        kind: SyntaxKind.ImportClause;
+        parent?: ImportDeclaration;
         name?: Identifier; // Default binding
         namedBindings?: NamedImportBindings;
     }
 
-    // @kind(SyntaxKind.NamespaceImport)
-    export interface NamespaceImport extends Declaration {
+    export interface NamespaceImport extends NamedDeclaration {
+        kind: SyntaxKind.NamespaceImport;
+        parent?: ImportClause;
         name: Identifier;
     }
 
-    // @kind(SyntaxKind.NamespaceExportDeclaration)
     export interface NamespaceExportDeclaration extends DeclarationStatement {
+        kind: SyntaxKind.NamespaceExportDeclaration;
         name: Identifier;
-        moduleReference: LiteralLikeNode;
     }
 
-    // @kind(SyntaxKind.ExportDeclaration)
     export interface ExportDeclaration extends DeclarationStatement {
+        kind: SyntaxKind.ExportDeclaration;
+        parent?: SourceFile | ModuleBlock;
         exportClause?: NamedExports;
+        /** If this is not a StringLiteral it will be a grammar error. */
         moduleSpecifier?: Expression;
     }
 
-    // @kind(SyntaxKind.NamedImports)
     export interface NamedImports extends Node {
+        kind: SyntaxKind.NamedImports;
+        parent?: ImportClause;
         elements: NodeArray<ImportSpecifier>;
     }
 
-    // @kind(SyntaxKind.NamedExports)
     export interface NamedExports extends Node {
+        kind: SyntaxKind.NamedExports;
+        parent?: ExportDeclaration;
         elements: NodeArray<ExportSpecifier>;
     }
 
     export type NamedImportsOrExports = NamedImports | NamedExports;
 
-    // @kind(SyntaxKind.ImportSpecifier)
-    export interface ImportSpecifier extends Declaration {
+    export interface ImportSpecifier extends NamedDeclaration {
+        kind: SyntaxKind.ImportSpecifier;
+        parent?: NamedImports;
         propertyName?: Identifier;  // Name preceding "as" keyword (or undefined when "as" is absent)
         name: Identifier;           // Declared name
     }
 
-    // @kind(SyntaxKind.ExportSpecifier)
-    export interface ExportSpecifier extends Declaration {
+    export interface ExportSpecifier extends NamedDeclaration {
+        kind: SyntaxKind.ExportSpecifier;
+        parent?: NamedExports;
         propertyName?: Identifier;  // Name preceding "as" keyword (or undefined when "as" is absent)
         name: Identifier;           // Declared name
     }
 
     export type ImportOrExportSpecifier = ImportSpecifier | ExportSpecifier;
 
-    // @kind(SyntaxKind.ExportAssignment)
     export interface ExportAssignment extends DeclarationStatement {
+        kind: SyntaxKind.ExportAssignment;
+        parent?: SourceFile;
         isExportEquals?: boolean;
         expression: Expression;
     }
@@ -1512,14 +2006,26 @@ namespace ts {
         fileName: string;
     }
 
+    export interface CheckJsDirective extends TextRange {
+        enabled: boolean;
+    }
+
+    export type CommentKind = SyntaxKind.SingleLineCommentTrivia | SyntaxKind.MultiLineCommentTrivia;
+
     export interface CommentRange extends TextRange {
         hasTrailingNewLine?: boolean;
-        kind: SyntaxKind;
+        kind: CommentKind;
+    }
+
+    export interface SynthesizedComment extends CommentRange {
+        text: string;
+        pos: -1;
+        end: -1;
     }
 
     // represents a top level: { type } expression in a JSDoc comment.
-    // @kind(SyntaxKind.JSDocTypeExpression)
     export interface JSDocTypeExpression extends Node {
+        kind: SyntaxKind.JSDocTypeExpression;
         type: JSDocType;
     }
 
@@ -1527,146 +2033,166 @@ namespace ts {
         _jsDocTypeBrand: any;
     }
 
-    // @kind(SyntaxKind.JSDocAllType)
     export interface JSDocAllType extends JSDocType {
-        _JSDocAllTypeBrand: any;
+        kind: SyntaxKind.JSDocAllType;
     }
 
-    // @kind(SyntaxKind.JSDocUnknownType)
     export interface JSDocUnknownType extends JSDocType {
-        _JSDocUnknownTypeBrand: any;
+        kind: SyntaxKind.JSDocUnknownType;
     }
 
-    // @kind(SyntaxKind.JSDocArrayType)
     export interface JSDocArrayType extends JSDocType {
+        kind: SyntaxKind.JSDocArrayType;
         elementType: JSDocType;
     }
 
-    // @kind(SyntaxKind.JSDocUnionType)
     export interface JSDocUnionType extends JSDocType {
+        kind: SyntaxKind.JSDocUnionType;
         types: NodeArray<JSDocType>;
     }
 
-    // @kind(SyntaxKind.JSDocTupleType)
     export interface JSDocTupleType extends JSDocType {
+        kind: SyntaxKind.JSDocTupleType;
         types: NodeArray<JSDocType>;
     }
 
-    // @kind(SyntaxKind.JSDocNonNullableType)
     export interface JSDocNonNullableType extends JSDocType {
+        kind: SyntaxKind.JSDocNonNullableType;
         type: JSDocType;
     }
 
-    // @kind(SyntaxKind.JSDocNullableType)
     export interface JSDocNullableType extends JSDocType {
+        kind: SyntaxKind.JSDocNullableType;
         type: JSDocType;
     }
 
-    // @kind(SyntaxKind.JSDocRecordType)
-    export interface JSDocRecordType extends JSDocType, TypeLiteralNode {
+    export interface JSDocRecordType extends JSDocType {
+        kind: SyntaxKind.JSDocRecordType;
         literal: TypeLiteralNode;
     }
 
-    // @kind(SyntaxKind.JSDocTypeReference)
     export interface JSDocTypeReference extends JSDocType {
+        kind: SyntaxKind.JSDocTypeReference;
         name: EntityName;
         typeArguments: NodeArray<JSDocType>;
     }
 
-    // @kind(SyntaxKind.JSDocOptionalType)
     export interface JSDocOptionalType extends JSDocType {
+        kind: SyntaxKind.JSDocOptionalType;
         type: JSDocType;
     }
 
-    // @kind(SyntaxKind.JSDocFunctionType)
     export interface JSDocFunctionType extends JSDocType, SignatureDeclaration {
+        kind: SyntaxKind.JSDocFunctionType;
         parameters: NodeArray<ParameterDeclaration>;
         type: JSDocType;
     }
 
-    // @kind(SyntaxKind.JSDocVariadicType)
     export interface JSDocVariadicType extends JSDocType {
+        kind: SyntaxKind.JSDocVariadicType;
         type: JSDocType;
     }
 
-    // @kind(SyntaxKind.JSDocConstructorType)
     export interface JSDocConstructorType extends JSDocType {
+        kind: SyntaxKind.JSDocConstructorType;
         type: JSDocType;
     }
 
-    // @kind(SyntaxKind.JSDocThisType)
     export interface JSDocThisType extends JSDocType {
+        kind: SyntaxKind.JSDocThisType;
         type: JSDocType;
     }
 
     export interface JSDocLiteralType extends JSDocType {
+        kind: SyntaxKind.JSDocLiteralType;
         literal: LiteralTypeNode;
     }
 
     export type JSDocTypeReferencingNode = JSDocThisType | JSDocConstructorType | JSDocVariadicType | JSDocOptionalType | JSDocNullableType | JSDocNonNullableType;
 
-    // @kind(SyntaxKind.JSDocRecordMember)
     export interface JSDocRecordMember extends PropertySignature {
-        name: Identifier | LiteralExpression;
+        kind: SyntaxKind.JSDocRecordMember;
+        name: Identifier | StringLiteral | NumericLiteral;
         type?: JSDocType;
     }
 
-    // @kind(SyntaxKind.JSDocComment)
     export interface JSDoc extends Node {
+        kind: SyntaxKind.JSDocComment;
         tags: NodeArray<JSDocTag> | undefined;
         comment: string | undefined;
     }
 
-    // @kind(SyntaxKind.JSDocTag)
     export interface JSDocTag extends Node {
-        atToken: Node;
+        parent: JSDoc;
+        atToken: AtToken;
         tagName: Identifier;
         comment: string | undefined;
     }
 
-    // @kind(SyntaxKind.JSDocTemplateTag)
+    export interface JSDocUnknownTag extends JSDocTag {
+        kind: SyntaxKind.JSDocTag;
+    }
+
+    export interface JSDocAugmentsTag extends JSDocTag {
+        kind: SyntaxKind.JSDocAugmentsTag;
+        typeExpression: JSDocTypeExpression;
+    }
+
+    export interface JSDocClassTag extends JSDocTag {
+        kind: SyntaxKind.JSDocClassTag;
+    }
+
     export interface JSDocTemplateTag extends JSDocTag {
+        kind: SyntaxKind.JSDocTemplateTag;
         typeParameters: NodeArray<TypeParameterDeclaration>;
     }
 
-    // @kind(SyntaxKind.JSDocReturnTag)
     export interface JSDocReturnTag extends JSDocTag {
+        kind: SyntaxKind.JSDocReturnTag;
         typeExpression: JSDocTypeExpression;
     }
 
-    // @kind(SyntaxKind.JSDocTypeTag)
     export interface JSDocTypeTag extends JSDocTag {
+        kind: SyntaxKind.JSDocTypeTag;
         typeExpression: JSDocTypeExpression;
     }
 
-    // @kind(SyntaxKind.JSDocTypedefTag)
-    export interface JSDocTypedefTag extends JSDocTag, Declaration {
+    export interface JSDocTypedefTag extends JSDocTag, NamedDeclaration {
+        parent: JSDoc;
+        kind: SyntaxKind.JSDocTypedefTag;
+        fullName?: JSDocNamespaceDeclaration | Identifier;
         name?: Identifier;
         typeExpression?: JSDocTypeExpression;
         jsDocTypeLiteral?: JSDocTypeLiteral;
     }
 
-    // @kind(SyntaxKind.JSDocPropertyTag)
     export interface JSDocPropertyTag extends JSDocTag, TypeElement {
+        parent: JSDoc;
+        kind: SyntaxKind.JSDocPropertyTag;
         name: Identifier;
+        /** the parameter name, if provided *before* the type (TypeScript-style) */
+        preParameterName?: Identifier;
+        /** the parameter name, if provided *after* the type (JSDoc-standard) */
+        postParameterName?: Identifier;
         typeExpression: JSDocTypeExpression;
+        isBracketed: boolean;
     }
 
-    // @kind(SyntaxKind.JSDocTypeLiteral)
     export interface JSDocTypeLiteral extends JSDocType {
+        kind: SyntaxKind.JSDocTypeLiteral;
         jsDocPropertyTags?: NodeArray<JSDocPropertyTag>;
         jsDocTypeTag?: JSDocTypeTag;
     }
 
-    // @kind(SyntaxKind.JSDocParameterTag)
     export interface JSDocParameterTag extends JSDocTag {
+        kind: SyntaxKind.JSDocParameterTag;
         /** the parameter name, if provided *before* the type (TypeScript-style) */
         preParameterName?: Identifier;
         typeExpression?: JSDocTypeExpression;
         /** the parameter name, if provided *after* the type (JSDoc-standard) */
         postParameterName?: Identifier;
         /** the parameter name, regardless of the location it was provided */
-        parameterName: Identifier;
+        name: Identifier;
         isBracketed: boolean;
     }
 
@@ -1679,12 +2205,28 @@ namespace ts {
         TrueCondition  = 1 << 5,  // Condition known to be true
         FalseCondition = 1 << 6,  // Condition known to be false
         SwitchClause   = 1 << 7,  // Switch statement clause
-        Referenced     = 1 << 8,  // Referenced as antecedent once
-        Shared         = 1 << 9,  // Referenced as antecedent more than once
+        ArrayMutation  = 1 << 8,  // Potential array mutation
+        Referenced     = 1 << 9,  // Referenced as antecedent once
+        Shared         = 1 << 10, // Referenced as antecedent more than once
+        PreFinally     = 1 << 11, // Injected edge that links pre-finally label and pre-try flow
+        AfterFinally   = 1 << 12, // Injected edge that links post-finally flow with the rest of the graph
         Label = BranchLabel | LoopLabel,
         Condition = TrueCondition | FalseCondition
     }
 
+    export interface FlowLock {
+        locked?: boolean;
+    }
+
+    export interface AfterFinallyFlow extends FlowNode, FlowLock {
+        antecedent: FlowNode;
+    }
+
+    export interface PreFinallyFlow extends FlowNode {
+        antecedent: FlowNode;
+        lock: FlowLock;
+    }
+
     export interface FlowNode {
         flags: FlowFlags;
         id?: number;     // Node id used by flow type cache in checker
@@ -1694,7 +2236,7 @@ namespace ts {
     // function, the container property references the function (which in turn has a flowNode
     // property for the containing control flow).
     export interface FlowStart extends FlowNode {
-        container?: FunctionExpression | ArrowFunction;
+        container?: FunctionExpression | ArrowFunction | MethodDeclaration;
     }
 
     // FlowLabel represents a junction with multiple possible preceding control flows.
@@ -1723,6 +2265,13 @@ namespace ts {
         antecedent: FlowNode;
     }
 
+    // FlowArrayMutation represents a node potentially mutates an array, i.e. an
+    // operation of the form 'x.push(value)', 'x.unshift(value)' or 'x[n] = value'.
+    export interface FlowArrayMutation extends FlowNode {
+        node: CallExpression | BinaryExpression;
+        antecedent: FlowNode;
+    }
+
     export type FlowType = Type | IncompleteType;
 
     // Incomplete types occur during control flow analysis of loops. An IncompleteType
@@ -1738,14 +2287,24 @@ namespace ts {
         name: string;
     }
 
+    /* @internal */
+    /**
+     * Subset of properties from SourceFile that are used in multiple utility functions
+     */
+    export interface SourceFileLike {
+        readonly text: string;
+        lineMap: number[];
+    }
+
+
     // Source files are declarations when they are external modules.
-    // @kind(SyntaxKind.SourceFile)
     export interface SourceFile extends Declaration {
+        kind: SyntaxKind.SourceFile;
         statements: NodeArray<Statement>;
-        endOfFileToken: Node;
+        endOfFileToken: Token<SyntaxKind.EndOfFileToken>;
 
         fileName: string;
-        /* internal */ path: Path;
+        /* @internal */ path: Path;
         text: string;
 
         amdDependencies: AmdDependency[];
@@ -1782,13 +2341,19 @@ namespace ts {
         /* @internal */ identifierCount: number;
         /* @internal */ symbolCount: number;
 
-        // File level diagnostics reported by the parser (includes diagnostics about /// references
+        // File-level diagnostics reported by the parser (includes diagnostics about /// references
         // as well as code diagnostics).
         /* @internal */ parseDiagnostics: Diagnostic[];
 
-        // File level diagnostics reported by the binder.
+        // File-level diagnostics reported by the binder.
         /* @internal */ bindDiagnostics: Diagnostic[];
 
+        // File-level JSDoc diagnostics reported by the JSDoc parser
+        /* @internal */ jsDocDiagnostics?: Diagnostic[];
+
+        // Stores additional file-level diagnostics reported by the program
+        /* @internal */ additionalSyntacticDiagnostics?: Diagnostic[];
+
         // Stores a line map for the file.
         // This field should never be used directly to obtain line map, use getLineMap function instead.
         /* @internal */ lineMap: number[];
@@ -1796,13 +2361,23 @@ namespace ts {
         // Stores a mapping 'external module reference text' -> 'resolved file name' | undefined
         // It is used to resolve module names in the checker.
         // Content of this field should never be used directly - use getResolvedModuleFileName/setResolvedModuleFileName functions instead
-        /* @internal */ resolvedModules: Map<ResolvedModule>;
+        /* @internal */ resolvedModules: Map<ResolvedModuleFull>;
         /* @internal */ resolvedTypeReferenceDirectiveNames: Map<ResolvedTypeReferenceDirective>;
-        /* @internal */ imports: LiteralExpression[];
-        /* @internal */ moduleAugmentations: LiteralExpression[];
+        /* @internal */ imports: StringLiteral[];
+        /* @internal */ moduleAugmentations: StringLiteral[];
         /* @internal */ patternAmbientModules?: PatternAmbientModule[];
-        // The synthesized identifier for an imported external helpers module.
-        /* @internal */ externalHelpersModuleName?: Identifier;
+        /* @internal */ ambientModuleNames: string[];
+        /* @internal */ checkJsDirective: CheckJsDirective | undefined;
+    }
+
+    export interface Bundle extends Node {
+        kind: SyntaxKind.Bundle;
+        sourceFiles: SourceFile[];
+    }
+
+    export interface JsonSourceFile extends SourceFile {
+        jsonObject?: ObjectLiteralExpression;
+        extendedSourceFiles?: string[];
     }
 
     export interface ScriptReferenceHost {
@@ -1818,9 +2393,9 @@ namespace ts {
         readDirectory(rootDir: string, extensions: string[], excludes: string[], includes: string[]): string[];
 
         /**
-          * Gets a value indicating whether the specified path exists and is a file.
-          * @param path The path to test.
-          */
+         * Gets a value indicating whether the specified path exists and is a file.
+         * @param path The path to test.
+         */
         fileExists(path: string): boolean;
 
         readFile(path: string): string;
@@ -1861,7 +2436,7 @@ namespace ts {
          * used for writing the JavaScript and declaration files.  Otherwise, the writeFile parameter
          * will be invoked when writing the JavaScript and declaration files.
          */
-        emit(targetSourceFile?: SourceFile, writeFile?: WriteFileCallback, cancellationToken?: CancellationToken, emitOnlyDtsFiles?: boolean): EmitResult;
+        emit(targetSourceFile?: SourceFile, writeFile?: WriteFileCallback, cancellationToken?: CancellationToken, emitOnlyDtsFiles?: boolean, customTransformers?: CustomTransformers): EmitResult;
 
         getOptionsDiagnostics(cancellationToken?: CancellationToken): Diagnostic[];
         getGlobalDiagnostics(cancellationToken?: CancellationToken): Diagnostic[];
@@ -1890,8 +2465,25 @@ namespace ts {
 
         /* @internal */ getFileProcessingDiagnostics(): DiagnosticCollection;
         /* @internal */ getResolvedTypeReferenceDirectives(): Map<ResolvedTypeReferenceDirective>;
+        /* @internal */ isSourceFileFromExternalLibrary(file: SourceFile): boolean;
         // For testing purposes only.
-        /* @internal */ structureIsReused?: boolean;
+        /* @internal */ structureIsReused?: StructureIsReused;
+
+        /* @internal */ getSourceFileFromReference(referencingFile: SourceFile, ref: FileReference): SourceFile | undefined;
+    }
+
+    /* @internal */
+    export const enum StructureIsReused {
+        Not         = 0,
+        SafeModules = 1 << 0,
+        Completely  = 1 << 1,
+    }
+
+    export interface CustomTransformers {
+        /** Custom transformers to evaluate before built-in transformations. */
+        before?: TransformerFactory<SourceFile>[];
+        /** Custom transformers to evaluate after built-in transformations. */
+        after?: TransformerFactory<SourceFile>[];
     }
 
     export interface SourceMapSpan {
@@ -1957,44 +2549,75 @@ namespace ts {
         getTypeOfSymbolAtLocation(symbol: Symbol, node: Node): Type;
         getDeclaredTypeOfSymbol(symbol: Symbol): Type;
         getPropertiesOfType(type: Type): Symbol[];
-        getPropertyOfType(type: Type, propertyName: string): Symbol;
+        getPropertyOfType(type: Type, propertyName: string): Symbol | undefined;
+        getIndexInfoOfType(type: Type, kind: IndexKind): IndexInfo | undefined;
         getSignaturesOfType(type: Type, kind: SignatureKind): Signature[];
-        getIndexTypeOfType(type: Type, kind: IndexKind): Type;
-        getBaseTypes(type: InterfaceType): ObjectType[];
+        getIndexTypeOfType(type: Type, kind: IndexKind): Type | undefined;
+        getBaseTypes(type: InterfaceType): BaseType[];
+        getBaseTypeOfLiteralType(type: Type): Type;
+        getWidenedType(type: Type): Type;
         getReturnTypeOfSignature(signature: Signature): Type;
+        /**
+         * Gets the type of a parameter at a given position in a signature.
+         * Returns `any` if the index is not valid.
+         */
+        /* @internal */ getParameterType(signature: Signature, parameterIndex: number): Type;
         getNonNullableType(type: Type): Type;
 
+        /** Note that the resulting nodes cannot be checked. */
+        typeToTypeNode(type: Type, enclosingDeclaration?: Node, flags?: NodeBuilderFlags): TypeNode;
+        /** Note that the resulting nodes cannot be checked. */
+        signatureToSignatureDeclaration(signature: Signature, kind: SyntaxKind, enclosingDeclaration?: Node, flags?: NodeBuilderFlags): SignatureDeclaration;
+        /** Note that the resulting nodes cannot be checked. */
+        indexInfoToIndexSignatureDeclaration(indexInfo: IndexInfo, kind: IndexKind, enclosingDeclaration?: Node, flags?: NodeBuilderFlags): IndexSignatureDeclaration;
+
         getSymbolsInScope(location: Node, meaning: SymbolFlags): Symbol[];
-        getSymbolAtLocation(node: Node): Symbol;
+        getSymbolAtLocation(node: Node): Symbol | undefined;
         getSymbolsOfParameterPropertyDeclaration(parameter: ParameterDeclaration, parameterName: string): Symbol[];
-        getShorthandAssignmentValueSymbol(location: Node): Symbol;
-        getExportSpecifierLocalTargetSymbol(location: ExportSpecifier): Symbol;
-        getPropertySymbolOfDestructuringAssignment(location: Identifier): Symbol;
+        getShorthandAssignmentValueSymbol(location: Node): Symbol | undefined;
+        getExportSpecifierLocalTargetSymbol(location: ExportSpecifier): Symbol | undefined;
+        getPropertySymbolOfDestructuringAssignment(location: Identifier): Symbol | undefined;
         getTypeAtLocation(node: Node): Type;
+        getTypeFromTypeNode(node: TypeNode): Type;
+        signatureToString(signature: Signature, enclosingDeclaration?: Node, flags?: TypeFormatFlags, kind?: SignatureKind): string;
         typeToString(type: Type, enclosingDeclaration?: Node, flags?: TypeFormatFlags): string;
         symbolToString(symbol: Symbol, enclosingDeclaration?: Node, meaning?: SymbolFlags): string;
         getSymbolDisplayBuilder(): SymbolDisplayBuilder;
         getFullyQualifiedName(symbol: Symbol): string;
         getAugmentedPropertiesOfType(type: Type): Symbol[];
         getRootSymbols(symbol: Symbol): Symbol[];
-        getContextualType(node: Expression): Type;
-        getResolvedSignature(node: CallLikeExpression, candidatesOutArray?: Signature[]): Signature;
-        getSignatureFromDeclaration(declaration: SignatureDeclaration): Signature;
-        isImplementationOfOverload(node: FunctionLikeDeclaration): boolean;
+        getContextualType(node: Expression): Type | undefined;
+        getResolvedSignature(node: CallLikeExpression, candidatesOutArray?: Signature[]): Signature | undefined;
+        getSignatureFromDeclaration(declaration: SignatureDeclaration): Signature | undefined;
+        isImplementationOfOverload(node: FunctionLikeDeclaration): boolean | undefined;
         isUndefinedSymbol(symbol: Symbol): boolean;
         isArgumentsSymbol(symbol: Symbol): boolean;
         isUnknownSymbol(symbol: Symbol): boolean;
+        /* @internal */ getMergedSymbol(symbol: Symbol): Symbol;
 
-        getConstantValue(node: EnumMember | PropertyAccessExpression | ElementAccessExpression): number;
+        getConstantValue(node: EnumMember | PropertyAccessExpression | ElementAccessExpression): string | number | undefined;
         isValidPropertyAccess(node: PropertyAccessExpression | QualifiedName, propertyName: string): boolean;
+        /** Follow all aliases to get the original symbol. */
         getAliasedSymbol(symbol: Symbol): Symbol;
+        /** Follow a *single* alias to get the immediately aliased symbol. */
+        /* @internal */ getImmediateAliasedSymbol(symbol: Symbol): Symbol;
         getExportsOfModule(moduleSymbol: Symbol): Symbol[];
+        /** Unlike `getExportsOfModule`, this includes properties of an `export =` value. */
+        /* @internal */ getExportsAndPropertiesOfModule(moduleSymbol: Symbol): Symbol[];
 
-        getJsxElementAttributesType(elementNode: JsxOpeningLikeElement): Type;
+        getAllAttributesTypeFromJsxOpeningLikeElement(elementNode: JsxOpeningLikeElement): Type | undefined;
         getJsxIntrinsicTagNames(): Symbol[];
         isOptionalParameter(node: ParameterDeclaration): boolean;
         getAmbientModules(): Symbol[];
 
+        tryGetMemberInModuleExports(memberName: string, moduleSymbol: Symbol): Symbol | undefined;
+        getApparentType(type: Type): Type;
+        getSuggestionForNonexistentProperty(node: Identifier, containingType: Type): string | undefined;
+        getSuggestionForNonexistentSymbol(location: Node, name: string, meaning: SymbolFlags): string | undefined;
+        /* @internal */ getBaseConstraintOfType(type: Type): Type | undefined;
+
+        /* @internal */ tryFindAmbientModuleWithoutAugmentations(moduleName: string): Symbol | undefined;
+
         // Should not be called directly.  Should only be accessed through the Program instance.
         /* @internal */ getDiagnostics(sourceFile?: SourceFile, cancellationToken?: CancellationToken): Diagnostic[];
         /* @internal */ getGlobalDiagnostics(): Diagnostic[];
@@ -2004,12 +2627,47 @@ namespace ts {
         /* @internal */ getIdentifierCount(): number;
         /* @internal */ getSymbolCount(): number;
         /* @internal */ getTypeCount(): number;
+
+        /**
+         * For a union, will include a property if it's defined in *any* of the member types.
+         * So for `{ a } | { b }`, this will include both `a` and `b`.
+         * Does not include properties of primitive types.
+         */
+        /* @internal */ getAllPossiblePropertiesOfType(type: Type): Symbol[];
+
+        /* @internal */ getJsxNamespace(): string;
+        /* @internal */ resolveNameAtLocation(location: Node, name: string, meaning: SymbolFlags): Symbol | undefined;
+    }
+
+    export enum NodeBuilderFlags {
+        None                                    = 0,
+        // Options
+        NoTruncation                            = 1 << 0,   // Don't truncate result
+        WriteArrayAsGenericType                 = 1 << 1,   // Write Array<T> instead T[]
+        WriteTypeArgumentsOfSignature           = 1 << 5,   // Write the type arguments instead of type parameters of the signature
+        UseFullyQualifiedType                   = 1 << 6,   // Write out the fully qualified type name (eg. Module.Type, instead of Type)
+        SuppressAnyReturnType                   = 1 << 8,   // If the return type is any-like, don't offer a return type.
+        WriteTypeParametersInQualifiedName      = 1 << 9,
+
+        // Error handling
+        AllowThisInObjectLiteral                = 1 << 10,
+        AllowQualifedNameInPlaceOfIdentifier    = 1 << 11,
+        AllowAnonymousIdentifier                = 1 << 13,
+        AllowEmptyUnionOrIntersection           = 1 << 14,
+        AllowEmptyTuple                         = 1 << 15,
+
+        IgnoreErrors = AllowThisInObjectLiteral | AllowQualifedNameInPlaceOfIdentifier | AllowAnonymousIdentifier | AllowEmptyUnionOrIntersection | AllowEmptyTuple,
+
+        // State
+        InObjectTypeLiteral                     = 1 << 20,
+        InTypeAlias                             = 1 << 23,    // Writing type in type alias declaration
     }
 
     export interface SymbolDisplayBuilder {
         buildTypeDisplay(type: Type, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
         buildSymbolDisplay(symbol: Symbol, writer: SymbolWriter, enclosingDeclaration?: Node, meaning?: SymbolFlags, flags?: SymbolFormatFlags): void;
-        buildSignatureDisplay(signatures: Signature, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags, kind?: SignatureKind): void;
+        buildSignatureDisplay(signature: Signature, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags, kind?: SignatureKind): void;
+        buildIndexSignatureDisplay(info: IndexInfo, writer: SymbolWriter, kind: IndexKind, enclosingDeclaration?: Node, globalFlags?: TypeFormatFlags, symbolStack?: Symbol[]): void;
         buildParameterDisplay(parameter: Symbol, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
         buildTypeParameterDisplay(tp: TypeParameter, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
         buildTypePredicateDisplay(predicate: TypePredicate, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
@@ -2026,6 +2684,7 @@ namespace ts {
         writeSpace(text: string): void;
         writeStringLiteral(text: string): void;
         writeParameter(text: string): void;
+        writeProperty(text: string): void;
         writeSymbol(text: string, symbol: Symbol): void;
         writeLine(): void;
         increaseIndent(): void;
@@ -2037,21 +2696,25 @@ namespace ts {
         // with import statements it previously saw (but chose not to emit).
         trackSymbol(symbol: Symbol, enclosingDeclaration?: Node, meaning?: SymbolFlags): void;
         reportInaccessibleThisError(): void;
+        reportPrivateInBaseOfClassExpression(propertyName: string): void;
     }
 
     export const enum TypeFormatFlags {
-        None                            = 0x00000000,
-        WriteArrayAsGenericType         = 0x00000001,  // Write Array<T> instead T[]
-        UseTypeOfFunction               = 0x00000002,  // Write typeof instead of function type literal
-        NoTruncation                    = 0x00000004,  // Don't truncate typeToString result
-        WriteArrowStyleSignature        = 0x00000008,  // Write arrow style signature
-        WriteOwnNameForAnyLike          = 0x00000010,  // Write symbol's own name instead of 'any' for any like types (eg. unknown, __resolving__ etc)
-        WriteTypeArgumentsOfSignature   = 0x00000020,  // Write the type arguments instead of type parameters of the signature
-        InElementType                   = 0x00000040,  // Writing an array or union element type
-        UseFullyQualifiedType           = 0x00000080,  // Write out the fully qualified type name (eg. Module.Type, instead of Type)
-        InFirstTypeArgument             = 0x00000100,  // Writing first type argument of the instantiated type
-        InTypeAlias                     = 0x00000200,  // Writing type in type alias declaration
-        UseTypeAliasValue               = 0x00000400,  // Serialize the type instead of using type-alias. This is needed when we emit declaration file.
+        None                            = 0,
+        WriteArrayAsGenericType         = 1 << 0,  // Write Array<T> instead T[]
+        UseTypeOfFunction               = 1 << 2,  // Write typeof instead of function type literal
+        NoTruncation                    = 1 << 3,  // Don't truncate typeToString result
+        WriteArrowStyleSignature        = 1 << 4,  // Write arrow style signature
+        WriteOwnNameForAnyLike          = 1 << 5,  // Write symbol's own name instead of 'any' for any like types (eg. unknown, __resolving__ etc)
+        WriteTypeArgumentsOfSignature   = 1 << 6,  // Write the type arguments instead of type parameters of the signature
+        InElementType                   = 1 << 7,  // Writing an array or union element type
+        UseFullyQualifiedType           = 1 << 8,  // Write out the fully qualified type name (eg. Module.Type, instead of Type)
+        InFirstTypeArgument             = 1 << 9,  // Writing first type argument of the instantiated type
+        InTypeAlias                     = 1 << 10,  // Writing type in type alias declaration
+        UseTypeAliasValue               = 1 << 11,  // Serialize the type instead of using type-alias. This is needed when we emit declaration file.
+        SuppressAnyReturnType           = 1 << 12,  // If the return type is any-like, don't offer a return type.
+        AddUndefined                    = 1 << 13,  // Add undefined to types of initialized, non-optional parameters
+        WriteClassExpressionAsTypeLiteral = 1 << 14, // Write a type literal instead of (Anonymous class)
     }
 
     export const enum SymbolFormatFlags {
@@ -2076,6 +2739,12 @@ namespace ts {
         CannotBeNamed
     }
 
+    /* @internal */
+    export const enum SyntheticSymbolKind {
+        UnionOrIntersection,
+        Spread
+    }
+
     export const enum TypePredicateKind {
         This,
         Identifier
@@ -2086,13 +2755,12 @@ namespace ts {
         type: Type;
     }
 
-    // @kind (TypePredicateKind.This)
     export interface ThisTypePredicate extends TypePredicateBase {
-        _thisTypePredicateBrand: any;
+        kind: TypePredicateKind.This;
     }
 
-    // @kind (TypePredicateKind.Identifier)
     export interface IdentifierTypePredicate extends TypePredicateBase {
+        kind: TypePredicateKind.Identifier;
         parameterName: string;
         parameterIndex: number;
     }
@@ -2115,8 +2783,7 @@ namespace ts {
         errorModuleName?: string; // If the symbol is not visible from module, module's name
     }
 
-    /** Indicates how to serialize the name for a TypeReferenceNode when emitting decorator
-      * metadata */
+    /** Indicates how to serialize the name for a TypeReferenceNode when emitting decorator metadata */
     /* @internal */
     export enum TypeReferenceSerializationKind {
         Unknown,                            // The TypeReferenceNode could not be resolved. The type name
@@ -2150,15 +2817,16 @@ namespace ts {
         getNodeCheckFlags(node: Node): NodeCheckFlags;
         isDeclarationVisible(node: Declaration): boolean;
         collectLinkedAliases(node: Identifier): Node[];
-        isImplementationOfOverload(node: FunctionLikeDeclaration): boolean;
+        isImplementationOfOverload(node: FunctionLikeDeclaration): boolean | undefined;
+        isRequiredInitializedParameter(node: ParameterDeclaration): boolean;
+        isOptionalUninitializedParameterProperty(node: ParameterDeclaration): boolean;
         writeTypeOfDeclaration(declaration: AccessorDeclaration | VariableLikeDeclaration, enclosingDeclaration: Node, flags: TypeFormatFlags, writer: SymbolWriter): void;
         writeReturnTypeOfSignatureDeclaration(signatureDeclaration: SignatureDeclaration, enclosingDeclaration: Node, flags: TypeFormatFlags, writer: SymbolWriter): void;
         writeTypeOfExpression(expr: Expression, enclosingDeclaration: Node, flags: TypeFormatFlags, writer: SymbolWriter): void;
-        writeBaseConstructorTypeOfClass(node: ClassLikeDeclaration, enclosingDeclaration: Node, flags: TypeFormatFlags, writer: SymbolWriter): void;
         isSymbolAccessible(symbol: Symbol, enclosingDeclaration: Node, meaning: SymbolFlags, shouldComputeAliasToMarkVisible: boolean): SymbolAccessibilityResult;
         isEntityNameVisible(entityName: EntityNameOrEntityNameExpression, enclosingDeclaration: Node): SymbolVisibilityResult;
         // Returns the constant value this property access resolves to, or 'undefined' for a non-constant
-        getConstantValue(node: EnumMember | PropertyAccessExpression | ElementAccessExpression): number;
+        getConstantValue(node: EnumMember | PropertyAccessExpression | ElementAccessExpression): string | number;
         getReferencedValueDeclaration(reference: Identifier): Declaration;
         getTypeReferenceSerializationKind(typeName: EntityName, location?: Node): TypeReferenceSerializationKind;
         isOptionalParameter(node: ParameterDeclaration): boolean;
@@ -2167,43 +2835,41 @@ namespace ts {
         getExternalModuleFileFromDeclaration(declaration: ImportEqualsDeclaration | ImportDeclaration | ExportDeclaration | ModuleDeclaration): SourceFile;
         getTypeReferenceDirectivesForEntityName(name: EntityNameOrEntityNameExpression): string[];
         getTypeReferenceDirectivesForSymbol(symbol: Symbol, meaning?: SymbolFlags): string[];
-        isLiteralConstDeclaration(node: VariableDeclaration): boolean;
-        writeLiteralConstValue(node: VariableDeclaration, writer: SymbolWriter): void;
+        isLiteralConstDeclaration(node: VariableDeclaration | PropertyDeclaration | PropertySignature | ParameterDeclaration): boolean;
+        writeLiteralConstValue(node: VariableDeclaration | PropertyDeclaration | PropertySignature | ParameterDeclaration, writer: SymbolWriter): void;
+        getJsxFactoryEntity(): EntityName;
     }
 
     export const enum SymbolFlags {
         None                    = 0,
-        FunctionScopedVariable  = 0x00000001,  // Variable (var) or parameter
-        BlockScopedVariable     = 0x00000002,  // A block-scoped variable (let or const)
-        Property                = 0x00000004,  // Property or enum member
-        EnumMember              = 0x00000008,  // Enum member
-        Function                = 0x00000010,  // Function
-        Class                   = 0x00000020,  // Class
-        Interface               = 0x00000040,  // Interface
-        ConstEnum               = 0x00000080,  // Const enum
-        RegularEnum             = 0x00000100,  // Enum
-        ValueModule             = 0x00000200,  // Instantiated module
-        NamespaceModule         = 0x00000400,  // Uninstantiated module
-        TypeLiteral             = 0x00000800,  // Type Literal
-        ObjectLiteral           = 0x00001000,  // Object Literal
-        Method                  = 0x00002000,  // Method
-        Constructor             = 0x00004000,  // Constructor
-        GetAccessor             = 0x00008000,  // Get accessor
-        SetAccessor             = 0x00010000,  // Set accessor
-        Signature               = 0x00020000,  // Call, construct, or index signature
-        TypeParameter           = 0x00040000,  // Type parameter
-        TypeAlias               = 0x00080000,  // Type alias
-        ExportValue             = 0x00100000,  // Exported value marker (see comment in declareModuleMember in binder)
-        ExportType              = 0x00200000,  // Exported type marker (see comment in declareModuleMember in binder)
-        ExportNamespace         = 0x00400000,  // Exported namespace marker (see comment in declareModuleMember in binder)
-        Alias                   = 0x00800000,  // An alias for another symbol (see comment in isAliasSymbolDeclaration in checker)
-        Instantiated            = 0x01000000,  // Instantiated symbol
-        Merged                  = 0x02000000,  // Merged symbol (created during program binding)
-        Transient               = 0x04000000,  // Transient symbol (created during type check)
-        Prototype               = 0x08000000,  // Prototype property (no source representation)
-        SyntheticProperty       = 0x10000000,  // Property in union or intersection type
-        Optional                = 0x20000000,  // Optional property
-        ExportStar              = 0x40000000,  // Export * declaration
+        FunctionScopedVariable  = 1 << 0,   // Variable (var) or parameter
+        BlockScopedVariable     = 1 << 1,   // A block-scoped variable (let or const)
+        Property                = 1 << 2,   // Property or enum member
+        EnumMember              = 1 << 3,   // Enum member
+        Function                = 1 << 4,   // Function
+        Class                   = 1 << 5,   // Class
+        Interface               = 1 << 6,   // Interface
+        ConstEnum               = 1 << 7,   // Const enum
+        RegularEnum             = 1 << 8,   // Enum
+        ValueModule             = 1 << 9,   // Instantiated module
+        NamespaceModule         = 1 << 10,  // Uninstantiated module
+        TypeLiteral             = 1 << 11,  // Type Literal or mapped type
+        ObjectLiteral           = 1 << 12,  // Object Literal
+        Method                  = 1 << 13,  // Method
+        Constructor             = 1 << 14,  // Constructor
+        GetAccessor             = 1 << 15,  // Get accessor
+        SetAccessor             = 1 << 16,  // Set accessor
+        Signature               = 1 << 17,  // Call, construct, or index signature
+        TypeParameter           = 1 << 18,  // Type parameter
+        TypeAlias               = 1 << 19,  // Type alias
+        ExportValue             = 1 << 20,  // Exported value marker (see comment in declareModuleMember in binder)
+        ExportType              = 1 << 21,  // Exported type marker (see comment in declareModuleMember in binder)
+        ExportNamespace         = 1 << 22,  // Exported namespace marker (see comment in declareModuleMember in binder)
+        Alias                   = 1 << 23,  // An alias for another symbol (see comment in isAliasSymbolDeclaration in checker)
+        Prototype               = 1 << 24,  // Prototype property (no source representation)
+        ExportStar              = 1 << 25,  // Export * declaration
+        Optional                = 1 << 26,  // Optional property
+        Transient               = 1 << 27,  // Transient symbol (created during type check)
 
         Enum = RegularEnum | ConstEnum,
         Variable = FunctionScopedVariable | BlockScopedVariable,
@@ -2263,11 +2929,9 @@ namespace ts {
         name: string;                           // Name of symbol
         declarations?: Declaration[];           // Declarations associated with this symbol
         valueDeclaration?: Declaration;         // First value declaration of the symbol
-
         members?: SymbolTable;                  // Class, interface or literal instance members
         exports?: SymbolTable;                  // Module exports
         globalExports?: SymbolTable;            // Conditional global UMD exports
-        /* @internal */ isReadonly?: boolean;   // readonly? (set only for intersections and unions)
         /* @internal */ id?: number;            // Unique id (used to look up SymbolLinks)
         /* @internal */ mergeId?: number;       // Merge id (used to look up merged symbol)
         /* @internal */ parent?: Symbol;        // Parent symbol
@@ -2280,6 +2944,7 @@ namespace ts {
 
     /* @internal */
     export interface SymbolLinks {
+        immediateTarget?: Symbol;           // Immediate target of an alias. May be another alias. Do not access directly, use `checker.getImmediateAliasedSymbol` instead.
         target?: Symbol;                    // Resolved (non-alias) target of an alias
         type?: Type;                        // Type of value symbol
         declaredType?: Type;                // Type of class, interface, enum, type alias, or type parameter
@@ -2288,19 +2953,46 @@ namespace ts {
         instantiations?: Map<Type>;         // Instantiations of generic type alias (undefined if non-generic)
         mapper?: TypeMapper;                // Type mapper for instantiation alias
         referenced?: boolean;               // True if alias symbol has been referenced as a value
-        containingType?: UnionOrIntersectionType; // Containing union or intersection type for synthetic property
-        hasNonUniformType?: boolean;        // True if constituents have non-uniform types
-        isPartial?: boolean;                // True if syntheric property of union type occurs in some but not all constituents
+        containingType?: UnionOrIntersectionType;  // Containing union or intersection type for synthetic property
+        leftSpread?: Symbol;                // Left source for synthetic spread property
+        rightSpread?: Symbol;               // Right source for synthetic spread property
+        syntheticOrigin?: Symbol;           // For a property on a mapped or spread type, points back to the original property
         isDiscriminantProperty?: boolean;   // True if discriminant synthetic property
         resolvedExports?: SymbolTable;      // Resolved exports of module
         exportsChecked?: boolean;           // True if exports of external module have been checked
+        typeParametersChecked?: boolean;    // True if type parameters of merged class and interface declarations have been checked.
         isDeclarationWithCollidingName?: boolean;    // True if symbol is block scoped redeclaration
         bindingElement?: BindingElement;    // Binding element associated with property symbol
         exportsSomeValue?: boolean;         // True if module exports some value (not just types)
+        enumKind?: EnumKind;                // Enum declaration classification
     }
 
     /* @internal */
-    export interface TransientSymbol extends Symbol, SymbolLinks { }
+    export const enum EnumKind {
+        Numeric,                            // Numeric enum (each member has a TypeFlags.Enum type)
+        Literal                             // Literal enum (each member has a TypeFlags.EnumLiteral type)
+    }
+
+    /* @internal */
+    export const enum CheckFlags {
+        Instantiated      = 1 << 0,         // Instantiated symbol
+        SyntheticProperty = 1 << 1,         // Property in union or intersection type
+        SyntheticMethod   = 1 << 2,         // Method in union or intersection type
+        Readonly          = 1 << 3,         // Readonly transient symbol
+        Partial           = 1 << 4,         // Synthetic property present in some but not all constituents
+        HasNonUniformType = 1 << 5,         // Synthetic property with non-uniform type in constituents
+        ContainsPublic    = 1 << 6,         // Synthetic property with public constituent(s)
+        ContainsProtected = 1 << 7,         // Synthetic property with protected constituent(s)
+        ContainsPrivate   = 1 << 8,         // Synthetic property with private constituent(s)
+        ContainsStatic    = 1 << 9,         // Synthetic property with static constituent(s)
+        Synthetic = SyntheticProperty | SyntheticMethod
+    }
+
+    /* @internal */
+    export interface TransientSymbol extends Symbol, SymbolLinks {
+        checkFlags: CheckFlags;
+        isRestParameter?: boolean;
+    }
 
     export type SymbolTable = Map<Symbol>;
 
@@ -2323,12 +3015,13 @@ namespace ts {
         TypeChecked                         = 0x00000001,  // Node has been type checked
         LexicalThis                         = 0x00000002,  // Lexical 'this' reference
         CaptureThis                         = 0x00000004,  // Lexical 'this' used in body
+        CaptureNewTarget                    = 0x00000008,  // Lexical 'new.target' used in body
         SuperInstance                       = 0x00000100,  // Instance 'super' reference
         SuperStatic                         = 0x00000200,  // Static 'super' reference
         ContextChecked                      = 0x00000400,  // Contextual types have been assigned
         AsyncMethodWithSuper                = 0x00000800,  // An async method that reads a value from a member of 'super'.
         AsyncMethodWithSuperBinding         = 0x00001000,  // An async method that assigns a value to a member of 'super'.
-        CaptureArguments                    = 0x00002000,  // Lexical 'arguments' used in body (for async functions)
+        CaptureArguments                    = 0x00002000,  // Lexical 'arguments' used in body
         EnumValuesComputed                  = 0x00004000,  // Values for enum members have been computed, and any errors have been reported for them.
         LexicalModuleMergesWithClass        = 0x00008000,  // Instantiated lexical module declaration is merged with a previous class declaration.
         LoopWithCapturedBlockScopedBinding  = 0x00010000,  // Loop that contains block scoped variable captured in closure
@@ -2349,11 +3042,13 @@ namespace ts {
         resolvedSignature?: Signature;    // Cached signature of signature node or call expression
         resolvedSymbol?: Symbol;          // Cached name resolution result
         resolvedIndexInfo?: IndexInfo;    // Cached indexing info resolution result
-        enumMemberValue?: number;         // Constant value of enum member
+        maybeTypePredicate?: boolean;     // Cached check whether call expression might reference a type predicate
+        enumMemberValue?: string | number;  // Constant value of enum member
         isVisible?: boolean;              // Is this node visible
+        containsArgumentsReference?: boolean; // Whether a function-like declaration contains an 'arguments' reference
         hasReportedStatementInAmbientContext?: boolean;  // Cache boolean if we report statements in ambient context
         jsxFlags?: JsxFlags;              // flags for knowing what kind of element/attributes we're dealing with
-        resolvedJsxType?: Type;           // resolved element attributes type of a JSX openinglike element
+        resolvedJsxElementAttributesType?: Type;  // resolved element attributes type of a JSX openinglike element
         hasSuperCall?: boolean;           // recorded result when we try to find super-call. We only try to find one if this flag is undefined, indicating that we haven't made an attempt.
         superCall?: ExpressionStatement;  // Cached first super-call found in the constructor. Used in checking whether super is called before this-accessing
         switchTypes?: Type[];             // Cached array of switch case expression types
@@ -2368,58 +3063,54 @@ namespace ts {
         StringLiteral           = 1 << 5,
         NumberLiteral           = 1 << 6,
         BooleanLiteral          = 1 << 7,
-        EnumLiteral             = 1 << 8,
+        EnumLiteral             = 1 << 8,   // Always combined with StringLiteral, NumberLiteral, or Union
         ESSymbol                = 1 << 9,   // Type of symbol primitive introduced in ES6
         Void                    = 1 << 10,
         Undefined               = 1 << 11,
         Null                    = 1 << 12,
         Never                   = 1 << 13,  // Never type
         TypeParameter           = 1 << 14,  // Type parameter
-        Class                   = 1 << 15,  // Class
-        Interface               = 1 << 16,  // Interface
-        Reference               = 1 << 17,  // Generic type reference
-        Tuple                   = 1 << 18,  // Synthesized generic tuple type
-        Union                   = 1 << 19,  // Union (T | U)
-        Intersection            = 1 << 20,  // Intersection (T & U)
-        Anonymous               = 1 << 21,  // Anonymous
-        Instantiated            = 1 << 22,  // Instantiated anonymous type
+        Object                  = 1 << 15,  // Object type
+        Union                   = 1 << 16,  // Union (T | U)
+        Intersection            = 1 << 17,  // Intersection (T & U)
+        Index                   = 1 << 18,  // keyof T
+        IndexedAccess           = 1 << 19,  // T[K]
         /* @internal */
-        ObjectLiteral           = 1 << 23,  // Originates in an object literal
+        FreshLiteral            = 1 << 20,  // Fresh literal type
         /* @internal */
-        FreshLiteral            = 1 << 24,  // Fresh literal type
+        ContainsWideningType    = 1 << 21,  // Type is or contains undefined or null widening type
         /* @internal */
-        ContainsWideningType    = 1 << 25,  // Type is or contains undefined or null widening type
+        ContainsObjectLiteral   = 1 << 22,  // Type is or contains object literal type
         /* @internal */
-        ContainsObjectLiteral   = 1 << 26,  // Type is or contains object literal type
+        ContainsAnyFunctionType = 1 << 23,  // Type is or contains object literal type
+        NonPrimitive            = 1 << 24,  // intrinsic object type
         /* @internal */
-        ContainsAnyFunctionType = 1 << 27,  // Type is or contains object literal type
-        ThisType                = 1 << 28,  // This type
-        ObjectLiteralPatternWithComputedProperties = 1 << 29,  // Object literal type implied by binding pattern has computed properties
+        JsxAttributes           = 1 << 25,  // Jsx attributes type
 
         /* @internal */
         Nullable = Undefined | Null,
-        Literal = StringLiteral | NumberLiteral | BooleanLiteral | EnumLiteral,
+        Literal = StringLiteral | NumberLiteral | BooleanLiteral,
         StringOrNumberLiteral = StringLiteral | NumberLiteral,
         /* @internal */
         DefinitelyFalsy = StringLiteral | NumberLiteral | BooleanLiteral | Void | Undefined | Null,
         PossiblyFalsy = DefinitelyFalsy | String | Number | Boolean,
         /* @internal */
-        Intrinsic = Any | String | Number | Boolean | BooleanLiteral | ESSymbol | Void | Undefined | Null | Never,
+        Intrinsic = Any | String | Number | Boolean | BooleanLiteral | ESSymbol | Void | Undefined | Null | Never | NonPrimitive,
         /* @internal */
-        Primitive = String | Number | Boolean | Enum | ESSymbol | Void | Undefined | Null | Literal,
-        StringLike = String | StringLiteral,
-        NumberLike = Number | NumberLiteral | Enum | EnumLiteral,
+        Primitive = String | Number | Boolean | Enum | EnumLiteral | ESSymbol | Void | Undefined | Null | Literal,
+        StringLike = String | StringLiteral | Index,
+        NumberLike = Number | NumberLiteral | Enum,
         BooleanLike = Boolean | BooleanLiteral,
         EnumLike = Enum | EnumLiteral,
-        ObjectType = Class | Interface | Reference | Tuple | Anonymous,
         UnionOrIntersection = Union | Intersection,
-        StructuredType = ObjectType | Union | Intersection,
-        StructuredOrTypeParameter = StructuredType | TypeParameter,
+        StructuredType = Object | Union | Intersection,
+        StructuredOrTypeVariable = StructuredType | TypeParameter | Index | IndexedAccess,
+        TypeVariable = TypeParameter | IndexedAccess,
 
         // 'Narrowable' types are types where narrowing actually narrows.
         // This *should* be every type other than null, undefined, void, and never
-        Narrowable = Any | StructuredType | TypeParameter | StringLike | NumberLike | BooleanLike | ESSymbol,
-        NotUnionOrUnit = Any | String | Number | ESSymbol | ObjectType,
+        Narrowable = Any | StructuredType | TypeParameter | Index | IndexedAccess | StringLike | NumberLike | BooleanLike | ESSymbol | NonPrimitive,
+        NotUnionOrUnit = Any | ESSymbol | Object | NonPrimitive,
         /* @internal */
         RequiresWidening = ContainsWideningType | ContainsObjectLiteral,
         /* @internal */
@@ -2432,6 +3123,7 @@ namespace ts {
     export interface Type {
         flags: TypeFlags;                // Flags
         /* @internal */ id: number;      // Unique ID
+        /* @internal */ checker: TypeChecker;
         symbol?: Symbol;                 // Symbol associated with type (if any)
         pattern?: DestructuringPattern;  // Destructuring pattern represented by type (if any)
         aliasSymbol?: Symbol;            // Alias associated with type
@@ -2447,25 +3139,43 @@ namespace ts {
     // String literal types (TypeFlags.StringLiteral)
     // Numeric literal types (TypeFlags.NumberLiteral)
     export interface LiteralType extends Type {
-        text: string;               // Text of literal
+        value: string | number;     // Value of literal
         freshType?: LiteralType;    // Fresh version of type
         regularType?: LiteralType;  // Regular version of type
     }
 
+    export interface StringLiteralType extends LiteralType {
+        value: string;
+    }
+
+    export interface NumberLiteralType extends LiteralType {
+        value: number;
+    }
+
     // Enum types (TypeFlags.Enum)
     export interface EnumType extends Type {
-        memberTypes: Map<EnumLiteralType>;
     }
 
-    // Enum types (TypeFlags.EnumLiteral)
-    export interface EnumLiteralType extends LiteralType {
-        baseType: EnumType & UnionType;  // Base enum type
+    export const enum ObjectFlags {
+        Class            = 1 << 0,  // Class
+        Interface        = 1 << 1,  // Interface
+        Reference        = 1 << 2,  // Generic type reference
+        Tuple            = 1 << 3,  // Synthesized generic tuple type
+        Anonymous        = 1 << 4,  // Anonymous
+        Mapped           = 1 << 5,  // Mapped
+        Instantiated     = 1 << 6,  // Instantiated anonymous or mapped type
+        ObjectLiteral    = 1 << 7,  // Originates in an object literal
+        EvolvingArray    = 1 << 8,  // Evolving array type
+        ObjectLiteralPatternWithComputedProperties = 1 << 9,  // Object literal pattern with computed properties
+        ClassOrInterface = Class | Interface
     }
 
     // Object types (TypeFlags.ObjectType)
-    export interface ObjectType extends Type { }
+    export interface ObjectType extends Type {
+        objectFlags: ObjectFlags;
+    }
 
-    // Class and interface types (TypeFlags.Class and TypeFlags.Interface)
+    /** Class and interface types (TypeFlags.Class and TypeFlags.Interface). */
     export interface InterfaceType extends ObjectType {
         typeParameters: TypeParameter[];           // Type parameters (undefined if non-generic)
         outerTypeParameters: TypeParameter[];      // Outer type parameters (undefined if none)
@@ -2474,9 +3184,12 @@ namespace ts {
         /* @internal */
         resolvedBaseConstructorType?: Type;        // Resolved base constructor type of class
         /* @internal */
-        resolvedBaseTypes: ObjectType[];           // Resolved base types
+        resolvedBaseTypes: BaseType[];             // Resolved base types
     }
 
+    // Object type or intersection of object types
+    export type BaseType = ObjectType | IntersectionType;
+
     export interface InterfaceTypeWithDeclaredMembers extends InterfaceType {
         declaredProperties: Symbol[];              // Declared members
         declaredCallSignatures: Signature[];       // Declared call signatures
@@ -2485,17 +3198,19 @@ namespace ts {
         declaredNumberIndexInfo: IndexInfo;        // Declared numeric indexing info
     }
 
-    // Type references (TypeFlags.Reference). When a class or interface has type parameters or
-    // a "this" type, references to the class or interface are made using type references. The
-    // typeArguments property specifies the types to substitute for the type parameters of the
-    // class or interface and optionally includes an extra element that specifies the type to
-    // substitute for "this" in the resulting instantiation. When no extra argument is present,
-    // the type reference itself is substituted for "this". The typeArguments property is undefined
-    // if the class or interface has no type parameters and the reference isn't specifying an
-    // explicit "this" argument.
+    /**
+     * Type references (TypeFlags.Reference). When a class or interface has type parameters or
+     * a "this" type, references to the class or interface are made using type references. The
+     * typeArguments property specifies the types to substitute for the type parameters of the
+     * class or interface and optionally includes an extra element that specifies the type to
+     * substitute for "this" in the resulting instantiation. When no extra argument is present,
+     * the type reference itself is substituted for "this". The typeArguments property is undefined
+     * if the class or interface has no type parameters and the reference isn't specifying an
+     * explicit "this" argument.
+     */
     export interface TypeReference extends ObjectType {
         target: GenericType;    // Type reference target
-        typeArguments: Type[];  // Type reference type arguments (undefined if none)
+        typeArguments?: Type[];  // Type reference type arguments (undefined if none)
     }
 
     // Generic class and interface types
@@ -2507,14 +3222,25 @@ namespace ts {
     export interface UnionOrIntersectionType extends Type {
         types: Type[];                    // Constituent types
         /* @internal */
-        resolvedProperties: SymbolTable;  // Cache of resolved properties
+        propertyCache: SymbolTable;       // Cache of resolved properties
+        /* @internal */
+        resolvedProperties: Symbol[];
         /* @internal */
-        couldContainTypeParameters: boolean;
+        resolvedIndexType: IndexType;
+        /* @internal */
+        resolvedBaseConstraint: Type;
+        /* @internal */
+        couldContainTypeVariables: boolean;
     }
 
     export interface UnionType extends UnionOrIntersectionType { }
 
-    export interface IntersectionType extends UnionOrIntersectionType { }
+    export interface IntersectionType extends UnionOrIntersectionType {
+        /* @internal */
+        resolvedApparentType: Type;
+    }
+
+    export type StructuredType = ObjectType | UnionType | IntersectionType;
 
     /* @internal */
     // An instantiated anonymous type has a target and a mapper
@@ -2523,6 +3249,21 @@ namespace ts {
         mapper?: TypeMapper;     // Instantiation mapper
     }
 
+    /* @internal */
+    export interface MappedType extends ObjectType {
+        declaration: MappedTypeNode;
+        typeParameter?: TypeParameter;
+        constraintType?: Type;
+        templateType?: Type;
+        modifiersType?: Type;
+        mapper?: TypeMapper;  // Instantiation mapper
+    }
+
+    export interface EvolvingArrayType extends ObjectType {
+        elementType: Type;      // Element expressions of evolving array type
+        finalArrayType?: Type;  // Final array type of evolving array type
+    }
+
     /* @internal */
     // Resolved object, union, or intersection type
     export interface ResolvedType extends ObjectType, UnionOrIntersectionType {
@@ -2536,7 +3277,7 @@ namespace ts {
 
     /* @internal */
     // Object literals are initially marked fresh. Freshness disappears following an assignment,
-    // before a type assertion, or when when an object literal's type is widened. The regular
+    // before a type assertion, or when  an object literal's type is widened. The regular
     // version of a fresh type is identical except for the TypeFlags.FreshObjectLiteral flag.
     export interface FreshObjectLiteralType extends ResolvedType {
         regularType: ResolvedType;  // Regular version of fresh type
@@ -2545,19 +3286,51 @@ namespace ts {
     // Just a place to cache element types of iterables and iterators
     /* @internal */
     export interface IterableOrIteratorType extends ObjectType, UnionType {
-        iterableElementType?: Type;
-        iteratorElementType?: Type;
+        iteratedTypeOfIterable?: Type;
+        iteratedTypeOfIterator?: Type;
+        iteratedTypeOfAsyncIterable?: Type;
+        iteratedTypeOfAsyncIterator?: Type;
+    }
+
+    /* @internal */
+    export interface PromiseOrAwaitableType extends ObjectType, UnionType {
+        promiseTypeOfPromiseConstructor?: Type;
+        promisedTypeOfPromise?: Type;
+        awaitedTypeOfType?: Type;
+    }
+
+    export interface TypeVariable extends Type {
+        /* @internal */
+        resolvedBaseConstraint: Type;
+        /* @internal */
+        resolvedIndexType: IndexType;
     }
 
     // Type parameters (TypeFlags.TypeParameter)
-    export interface TypeParameter extends Type {
+    export interface TypeParameter extends TypeVariable {
         constraint: Type;        // Constraint
+        default?: Type;
         /* @internal */
         target?: TypeParameter;  // Instantiation target
         /* @internal */
         mapper?: TypeMapper;     // Instantiation mapper
         /* @internal */
-        resolvedApparentType: Type;
+        isThisType?: boolean;
+        /* @internal */
+        resolvedDefaultType?: Type;
+    }
+
+    // Indexed access types (TypeFlags.IndexedAccess)
+    // Possible forms are T[xxx], xxx[T], or xxx[keyof T], where T is a type variable
+    export interface IndexedAccessType extends TypeVariable {
+        objectType: Type;
+        indexType: Type;
+        constraint?: Type;
+    }
+
+    // keyof T types (TypeFlags.Index)
+    export interface IndexType extends Type {
+        type: TypeVariable | UnionOrIntersectionType;
     }
 
     export const enum SignatureKind {
@@ -2567,7 +3340,7 @@ namespace ts {
 
     export interface Signature {
         declaration: SignatureDeclaration;  // Originating declaration
-        typeParameters: TypeParameter[];    // Type parameters (undefined if non-generic)
+        typeParameters?: TypeParameter[];   // Type parameters (undefined if non-generic)
         parameters: Symbol[];               // Parameters
         /* @internal */
         thisParameter?: Symbol;             // symbol of this-type parameter
@@ -2591,6 +3364,8 @@ namespace ts {
         isolatedSignatureType?: ObjectType; // A manufactured type that just contains the signature for purposes of signature comparison
         /* @internal */
         typePredicate?: TypePredicate;
+        /* @internal */
+        instantiations?: Map<Signature>;    // Generic signature instantiation cache
     }
 
     export const enum IndexKind {
@@ -2608,31 +3383,35 @@ namespace ts {
     export interface TypeMapper {
         (t: TypeParameter): Type;
         mappedTypes?: Type[];       // Types mapped by this mapper
-        targetTypes?: Type[];       // Types substituted for mapped types
         instantiations?: Type[];    // Cache of instantiations created using this type mapper.
-        context?: InferenceContext; // The inference context this mapper was created from.
-                                    // Only inference mappers have this set (in createInferenceMapper).
-                                    // The identity mapper and regular instantiation mappers do not need it.
     }
 
-    /* @internal */
-    export interface TypeInferences {
-        primary: Type[];    // Inferences made directly to a type parameter
-        secondary: Type[];  // Inferences made to a type parameter in a union type
-        topLevel: boolean;  // True if all inferences were made from top-level (not nested in object type) locations
-        isFixed: boolean;   // Whether the type parameter is fixed, as defined in section 4.12.2 of the TypeScript spec
-                            // If a type parameter is fixed, no more inferences can be made for the type parameter
+    export const enum InferencePriority {
+        NakedTypeVariable = 1 << 0,  // Naked type variable in union or intersection type
+        MappedType        = 1 << 1,  // Reverse inference for mapped type
+        ReturnType        = 1 << 2,  // Inference made from return type of generic function
+    }
+
+    export interface InferenceInfo {
+        typeParameter: TypeParameter;
+        candidates: Type[];
+        inferredType: Type;
+        priority: InferencePriority;
+        topLevel: boolean;
+        isFixed: boolean;
+    }
+
+    export const enum InferenceFlags {
+        InferUnionTypes = 1 << 0,  // Infer union types for disjoint candidates (otherwise unknownType)
+        NoDefault       = 1 << 1,  // Infer unknownType for no inferences (otherwise anyType or emptyObjectType)
+        AnyDefault      = 1 << 2,  // Infer anyType for no inferences (otherwise emptyObjectType)
     }
 
     /* @internal */
-    export interface InferenceContext {
+    export interface InferenceContext extends TypeMapper {
         signature: Signature;               // Generic signature for which inferences are made
-        inferUnionTypes: boolean;           // Infer union types for disjoint candidates (otherwise undefinedType)
-        inferences: TypeInferences[];       // Inferences made for each type parameter
-        inferredTypes: Type[];              // Inferred type for each type parameter
-        mapper?: TypeMapper;                // Type mapper for this inference context
-        failedTypeParameterIndex?: number;  // Index of type parameter for which inference failed
-        // It is optional because in contextual signature instantiation, nothing fails
+        inferences: InferenceInfo[];        // Inferences made for each type parameter
+        flags: InferenceFlags;              // Inference flags
     }
 
     /* @internal */
@@ -2645,7 +3424,14 @@ namespace ts {
         /// className.prototype.name = expr
         PrototypeProperty,
         /// this.name = expr
-        ThisProperty
+        ThisProperty,
+        // F.name = expr
+        Property
+    }
+
+    export interface JsFileExtensionInfo {
+        extension: string;
+        isMixedContent: boolean;
     }
 
     export interface DiagnosticMessage {
@@ -2669,18 +3455,19 @@ namespace ts {
     }
 
     export interface Diagnostic {
-        file: SourceFile;
-        start: number;
-        length: number;
+        file: SourceFile | undefined;
+        start: number | undefined;
+        length: number | undefined;
         messageText: string | DiagnosticMessageChain;
         category: DiagnosticCategory;
         code: number;
+        source?: string;
     }
 
     export enum DiagnosticCategory {
         Warning,
         Error,
-        Message,
+        Message
     }
 
     export enum ModuleResolutionKind {
@@ -2688,26 +3475,31 @@ namespace ts {
         NodeJs   = 2
     }
 
-    export type RootPaths = string[];
-    export type PathSubstitutions = MapLike<string[]>;
-    export type TsConfigOnlyOptions = RootPaths | PathSubstitutions;
+    export interface PluginImport {
+        name: string;
+    }
 
-    export type CompilerOptionsValue = string | number | boolean | (string | number)[] | TsConfigOnlyOptions;
+    export type CompilerOptionsValue = string | number | boolean | (string | number)[] | string[] | MapLike<string[]> | PluginImport[];
 
     export interface CompilerOptions {
+        /*@internal*/ all?: boolean;
         allowJs?: boolean;
         /*@internal*/ allowNonTsExtensions?: boolean;
         allowSyntheticDefaultImports?: boolean;
         allowUnreachableCode?: boolean;
         allowUnusedLabels?: boolean;
+        alwaysStrict?: boolean;  // Always combine with strict property
         baseUrl?: string;
         charset?: string;
+        checkJs?: boolean;
         /* @internal */ configFilePath?: string;
+        /* @internal */ readonly configFile?: JsonSourceFile;
         declaration?: boolean;
         declarationDir?: string;
         /* @internal */ diagnostics?: boolean;
         /* @internal */ extendedDiagnostics?: boolean;
         disableSizeLimit?: boolean;
+        downlevelIteration?: boolean;
         emitBOM?: boolean;
         emitDecoratorMetadata?: boolean;
         experimentalDecorators?: boolean;
@@ -2729,13 +3521,15 @@ namespace ts {
         moduleResolution?: ModuleResolutionKind;
         newLine?: NewLineKind;
         noEmit?: boolean;
+        /*@internal*/noEmitForJsFiles?: boolean;
         noEmitHelpers?: boolean;
         noEmitOnError?: boolean;
         noErrorTruncation?: boolean;
         noFallthroughCasesInSwitch?: boolean;
-        noImplicitAny?: boolean;
+        noImplicitAny?: boolean;  // Always combine with strict property
         noImplicitReturns?: boolean;
-        noImplicitThis?: boolean;
+        noImplicitThis?: boolean;  // Always combine with strict property
+        noStrictGenericChecks?: boolean;
         noUnusedLocals?: boolean;
         noUnusedParameters?: boolean;
         noImplicitUseStrict?: boolean;
@@ -2744,19 +3538,22 @@ namespace ts {
         out?: string;
         outDir?: string;
         outFile?: string;
-        paths?: PathSubstitutions;
+        paths?: MapLike<string[]>;
+        /*@internal*/ plugins?: PluginImport[];
         preserveConstEnums?: boolean;
         project?: string;
         /* @internal */ pretty?: DiagnosticStyle;
         reactNamespace?: string;
+        jsxFactory?: string;
         removeComments?: boolean;
         rootDir?: string;
-        rootDirs?: RootPaths;
+        rootDirs?: string[];
         skipLibCheck?: boolean;
         skipDefaultLibCheck?: boolean;
         sourceMap?: boolean;
         sourceRoot?: string;
-        strictNullChecks?: boolean;
+        strict?: boolean;
+        strictNullChecks?: boolean;  // Always combine with strict property
         /* @internal */ stripInternal?: boolean;
         suppressExcessPropertyErrors?: boolean;
         suppressImplicitAnyIndexErrors?: boolean;
@@ -2764,16 +3561,20 @@ namespace ts {
         target?: ScriptTarget;
         traceResolution?: boolean;
         types?: string[];
-        /** Paths used to used to compute primary types search locations */
+        /** Paths used to compute primary types search locations */
         typeRoots?: string[];
         /*@internal*/ version?: boolean;
         /*@internal*/ watch?: boolean;
 
-        [option: string]: CompilerOptionsValue | undefined;
+        [option: string]: CompilerOptionsValue | JsonSourceFile | undefined;
     }
 
-    export interface TypingOptions {
+    export interface TypeAcquisition {
+        /* @deprecated typingOptions.enableAutoDiscovery
+         * Use typeAcquisition.enable instead.
+         */
         enableAutoDiscovery?: boolean;
+        enable?: boolean;
         include?: string[];
         exclude?: string[];
         [option: string]: string[] | boolean | undefined;
@@ -2784,8 +3585,9 @@ namespace ts {
         projectRootPath: string;                        // The path to the project root directory
         safeListPath: string;                           // The path used to retrieve the safe list
         packageNameToTypingLocation: Map<string>;       // The map of package names to their cached typing locations
-        typingOptions: TypingOptions;                   // Used to customize the typing inference process
+        typeAcquisition: TypeAcquisition;               // Used to customize the type acquisition process
         compilerOptions: CompilerOptions;               // Used as a source for typing inference
+        unresolvedImports: ReadonlyArray<string>;       // List of unresolved module ids from imports
     }
 
     export enum ModuleKind {
@@ -2794,19 +3596,20 @@ namespace ts {
         AMD = 2,
         UMD = 3,
         System = 4,
-        ES6 = 5,
-        ES2015 = ES6,
+        ES2015 = 5,
+        ESNext = 6
     }
 
     export const enum JsxEmit {
         None = 0,
         Preserve = 1,
-        React = 2
+        React = 2,
+        ReactNative = 3
     }
 
     export const enum NewLineKind {
         CarriageReturnLineFeed = 0,
-        LineFeed = 1,
+        LineFeed = 1
     }
 
     export interface LineAndCharacter {
@@ -2822,15 +3625,19 @@ namespace ts {
         JS = 1,
         JSX = 2,
         TS = 3,
-        TSX = 4
+        TSX = 4,
+        External = 5,
+        JSON = 6
     }
 
     export const enum ScriptTarget {
         ES3 = 0,
         ES5 = 1,
-        ES6 = 2,
-        ES2015 = ES6,
-        Latest = ES6,
+        ES2015 = 2,
+        ES2016 = 3,
+        ES2017 = 4,
+        ESNext = 5,
+        Latest = ESNext,
     }
 
     export const enum LanguageVariant {
@@ -2844,9 +3651,10 @@ namespace ts {
         Pretty,
     }
 
+    /** Either a parsed command line or a parsed tsconfig.json */
     export interface ParsedCommandLine {
         options: CompilerOptions;
-        typingOptions?: TypingOptions;
+        typeAcquisition?: TypeAcquisition;
         fileNames: string[];
         raw?: any;
         errors: Diagnostic[];
@@ -2872,8 +3680,10 @@ namespace ts {
         shortName?: string;                                     // A short mnemonic for convenience - for instance, 'h' can be used in place of 'help'
         description?: DiagnosticMessage;                        // The message describing what the command line switch does
         paramType?: DiagnosticMessage;                          // The name to be used for a non-boolean option's parameter
-        experimental?: boolean;
         isTSConfigOnly?: boolean;                               // True if option can only be specified via tsconfig.json file
+        isCommandLineOnly?: boolean;
+        showInSimplifiedHelpView?: boolean;
+        category?: DiagnosticMessage;
     }
 
     /* @internal */
@@ -2889,12 +3699,14 @@ namespace ts {
     /* @internal */
     export interface TsConfigOnlyOption extends CommandLineOptionBase {
         type: "object";
+        elementOptions?: Map<CommandLineOption>;
+        extraKeyDiagnosticMessage?: DiagnosticMessage;
     }
 
     /* @internal */
     export interface CommandLineOptionOfListType extends CommandLineOptionBase {
         type: "list";
-        element: CommandLineOptionOfCustomType | CommandLineOptionOfPrimitiveType;
+        element: CommandLineOptionOfCustomType | CommandLineOptionOfPrimitiveType | TsConfigOnlyOption;
     }
 
     /* @internal */
@@ -3049,10 +3861,18 @@ namespace ts {
         getDirectories?(path: string): string[];
     }
 
+    /**
+     * Represents the result of module resolution.
+     * Module resolution will pick up tsx/jsx/js files even if '--jsx' and '--allowJs' are turned off.
+     * The Program will then filter results based on these flags.
+     *
+     * Prefer to return a `ResolvedModuleFull` so that the file type does not have to be inferred.
+     */
     export interface ResolvedModule {
+        /** Path of the file the module was resolved to. */
         resolvedFileName: string;
-        /*
-         * Denotes if 'resolvedFileName' is isExternalLibraryImport and thus should be proper external module:
+        /**
+         * Denotes if 'resolvedFileName' is isExternalLibraryImport and thus should be a proper external module:
          * - be a .d.ts file
          * - use top level imports\exports
          * - don't use tripleslash references
@@ -3060,8 +3880,29 @@ namespace ts {
         isExternalLibraryImport?: boolean;
     }
 
+    /**
+     * ResolvedModule with an explicitly provided `extension` property.
+     * Prefer this over `ResolvedModule`.
+     */
+    export interface ResolvedModuleFull extends ResolvedModule {
+        /**
+         * Extension of resolvedFileName. This must match what's at the end of resolvedFileName.
+         * This is optional for backwards-compatibility, but will be added if not provided.
+         */
+        extension: Extension;
+    }
+
+    export const enum Extension {
+        Ts = ".ts",
+        Tsx = ".tsx",
+        Dts = ".d.ts",
+        Js = ".js",
+        Jsx = ".jsx"
+    }
+
     export interface ResolvedModuleWithFailedLookupLocations {
-        resolvedModule: ResolvedModule;
+        resolvedModule: ResolvedModuleFull | undefined;
+        /* @internal */
         failedLookupLocations: string[];
     }
 
@@ -3113,123 +3954,428 @@ namespace ts {
         // - Flags used to indicate that a node or subtree contains syntax that requires transformation.
         TypeScript = 1 << 0,
         ContainsTypeScript = 1 << 1,
-        Jsx = 1 << 2,
-        ContainsJsx = 1 << 3,
-        ES7 = 1 << 4,
-        ContainsES7 = 1 << 5,
-        ES6 = 1 << 6,
-        ContainsES6 = 1 << 7,
-        DestructuringAssignment = 1 << 8,
-        Generator = 1 << 9,
-        ContainsGenerator = 1 << 10,
+        ContainsJsx = 1 << 2,
+        ContainsESNext = 1 << 3,
+        ContainsES2017 = 1 << 4,
+        ContainsES2016 = 1 << 5,
+        ES2015 = 1 << 6,
+        ContainsES2015 = 1 << 7,
+        Generator = 1 << 8,
+        ContainsGenerator = 1 << 9,
+        DestructuringAssignment = 1 << 10,
+        ContainsDestructuringAssignment = 1 << 11,
 
         // Markers
         // - Flags used to indicate that a subtree contains a specific transformation.
-        ContainsDecorators = 1 << 11,
-        ContainsPropertyInitializer = 1 << 12,
-        ContainsLexicalThis = 1 << 13,
-        ContainsCapturedLexicalThis = 1 << 14,
-        ContainsLexicalThisInComputedPropertyName = 1 << 15,
-        ContainsDefaultValueAssignments = 1 << 16,
-        ContainsParameterPropertyAssignments = 1 << 17,
-        ContainsSpreadElementExpression = 1 << 18,
-        ContainsComputedPropertyName = 1 << 19,
-        ContainsBlockScopedBinding = 1 << 20,
-        ContainsBindingPattern = 1 << 21,
-        ContainsYield = 1 << 22,
-        ContainsHoistedDeclarationOrCompletion = 1 << 23,
-
+        ContainsDecorators = 1 << 12,
+        ContainsPropertyInitializer = 1 << 13,
+        ContainsLexicalThis = 1 << 14,
+        ContainsCapturedLexicalThis = 1 << 15,
+        ContainsLexicalThisInComputedPropertyName = 1 << 16,
+        ContainsDefaultValueAssignments = 1 << 17,
+        ContainsParameterPropertyAssignments = 1 << 18,
+        ContainsSpread = 1 << 19,
+        ContainsObjectSpread = 1 << 20,
+        ContainsRest = ContainsSpread,
+        ContainsObjectRest = ContainsObjectSpread,
+        ContainsComputedPropertyName = 1 << 21,
+        ContainsBlockScopedBinding = 1 << 22,
+        ContainsBindingPattern = 1 << 23,
+        ContainsYield = 1 << 24,
+        ContainsHoistedDeclarationOrCompletion = 1 << 25,
+
+        ContainsDynamicImport = 1 << 26,
+
+        // Please leave this as 1 << 29.
+        // It is the maximum bit we can set before we outgrow the size of a v8 small integer (SMI) on an x86 system.
+        // It is a good reminder of how much room we have left
         HasComputedFlags = 1 << 29, // Transform flags have been computed.
 
         // Assertions
         // - Bitmasks that are used to assert facts about the syntax of a node and its subtree.
         AssertTypeScript = TypeScript | ContainsTypeScript,
-        AssertJsx = Jsx | ContainsJsx,
-        AssertES7 = ES7 | ContainsES7,
-        AssertES6 = ES6 | ContainsES6,
+        AssertJsx = ContainsJsx,
+        AssertESNext = ContainsESNext,
+        AssertES2017 = ContainsES2017,
+        AssertES2016 = ContainsES2016,
+        AssertES2015 = ES2015 | ContainsES2015,
         AssertGenerator = Generator | ContainsGenerator,
+        AssertDestructuringAssignment = DestructuringAssignment | ContainsDestructuringAssignment,
 
         // Scope Exclusions
         // - Bitmasks that exclude flags from propagating out of a specific context
         //   into the subtree flags of their container.
-        NodeExcludes = TypeScript | Jsx | ES7 | ES6 | DestructuringAssignment | Generator | HasComputedFlags,
-        ArrowFunctionExcludes = NodeExcludes | ContainsDecorators | ContainsDefaultValueAssignments | ContainsLexicalThis | ContainsParameterPropertyAssignments | ContainsBlockScopedBinding | ContainsYield | ContainsHoistedDeclarationOrCompletion,
-        FunctionExcludes = NodeExcludes | ContainsDecorators | ContainsDefaultValueAssignments | ContainsCapturedLexicalThis | ContainsLexicalThis | ContainsParameterPropertyAssignments | ContainsBlockScopedBinding | ContainsYield | ContainsHoistedDeclarationOrCompletion,
-        ConstructorExcludes = NodeExcludes | ContainsDefaultValueAssignments | ContainsLexicalThis | ContainsCapturedLexicalThis | ContainsBlockScopedBinding | ContainsYield | ContainsHoistedDeclarationOrCompletion,
-        MethodOrAccessorExcludes = NodeExcludes | ContainsDefaultValueAssignments | ContainsLexicalThis | ContainsCapturedLexicalThis | ContainsBlockScopedBinding | ContainsYield | ContainsHoistedDeclarationOrCompletion,
+        NodeExcludes = TypeScript | ES2015 | DestructuringAssignment | Generator | HasComputedFlags,
+        ArrowFunctionExcludes = NodeExcludes | ContainsDecorators | ContainsDefaultValueAssignments | ContainsLexicalThis | ContainsParameterPropertyAssignments | ContainsBlockScopedBinding | ContainsYield | ContainsHoistedDeclarationOrCompletion | ContainsBindingPattern | ContainsObjectRest,
+        FunctionExcludes = NodeExcludes | ContainsDecorators | ContainsDefaultValueAssignments | ContainsCapturedLexicalThis | ContainsLexicalThis | ContainsParameterPropertyAssignments | ContainsBlockScopedBinding | ContainsYield | ContainsHoistedDeclarationOrCompletion | ContainsBindingPattern | ContainsObjectRest,
+        ConstructorExcludes = NodeExcludes | ContainsDefaultValueAssignments | ContainsLexicalThis | ContainsCapturedLexicalThis | ContainsBlockScopedBinding | ContainsYield | ContainsHoistedDeclarationOrCompletion | ContainsBindingPattern | ContainsObjectRest,
+        MethodOrAccessorExcludes = NodeExcludes | ContainsDefaultValueAssignments | ContainsLexicalThis | ContainsCapturedLexicalThis | ContainsBlockScopedBinding | ContainsYield | ContainsHoistedDeclarationOrCompletion | ContainsBindingPattern | ContainsObjectRest,
         ClassExcludes = NodeExcludes | ContainsDecorators | ContainsPropertyInitializer | ContainsLexicalThis | ContainsCapturedLexicalThis | ContainsComputedPropertyName | ContainsParameterPropertyAssignments | ContainsLexicalThisInComputedPropertyName,
         ModuleExcludes = NodeExcludes | ContainsDecorators | ContainsLexicalThis | ContainsCapturedLexicalThis | ContainsBlockScopedBinding | ContainsHoistedDeclarationOrCompletion,
         TypeExcludes = ~ContainsTypeScript,
-        ObjectLiteralExcludes = NodeExcludes | ContainsDecorators | ContainsComputedPropertyName | ContainsLexicalThisInComputedPropertyName,
-        ArrayLiteralOrCallOrNewExcludes = NodeExcludes | ContainsSpreadElementExpression,
-        VariableDeclarationListExcludes = NodeExcludes | ContainsBindingPattern,
-        ParameterExcludes = NodeExcludes | ContainsBindingPattern,
+        ObjectLiteralExcludes = NodeExcludes | ContainsDecorators | ContainsComputedPropertyName | ContainsLexicalThisInComputedPropertyName | ContainsObjectSpread,
+        ArrayLiteralOrCallOrNewExcludes = NodeExcludes | ContainsSpread,
+        VariableDeclarationListExcludes = NodeExcludes | ContainsBindingPattern | ContainsObjectRest,
+        ParameterExcludes = NodeExcludes,
+        CatchClauseExcludes = NodeExcludes | ContainsObjectRest,
+        BindingPatternExcludes = NodeExcludes | ContainsRest,
 
         // Masks
         // - Additional bitmasks
         TypeScriptClassSyntaxMask = ContainsParameterPropertyAssignments | ContainsPropertyInitializer | ContainsDecorators,
-        ES6FunctionSyntaxMask = ContainsCapturedLexicalThis | ContainsDefaultValueAssignments,
+        ES2015FunctionSyntaxMask = ContainsCapturedLexicalThis | ContainsDefaultValueAssignments,
+    }
+
+    export interface SourceMapRange extends TextRange {
+        source?: SourceMapSource;
+    }
+
+    export interface SourceMapSource {
+        fileName: string;
+        text: string;
+        /* @internal */ lineMap: number[];
+        skipTrivia?: (pos: number) => number;
     }
 
     /* @internal */
     export interface EmitNode {
-        flags?: EmitFlags;
-        commentRange?: TextRange;
-        sourceMapRange?: TextRange;
-        tokenSourceMapRanges?: Map<TextRange>;
-        annotatedNodes?: Node[];                // Tracks Parse-tree nodes with EmitNodes for eventual cleanup.
-        constantValue?: number;
+        annotatedNodes?: Node[];                 // Tracks Parse-tree nodes with EmitNodes for eventual cleanup.
+        flags?: EmitFlags;                       // Flags that customize emit
+        leadingComments?: SynthesizedComment[];  // Synthesized leading comments
+        trailingComments?: SynthesizedComment[]; // Synthesized trailing comments
+        commentRange?: TextRange;                // The text range to use when emitting leading or trailing comments
+        sourceMapRange?: SourceMapRange;         // The text range to use when emitting leading or trailing source mappings
+        tokenSourceMapRanges?: SourceMapRange[]; // The text range to use when emitting source mappings for tokens
+        constantValue?: string | number;         // The constant value of an expression
+        externalHelpersModuleName?: Identifier;  // The local name for an imported helpers module
+        helpers?: EmitHelper[];                  // Emit helpers for the node
     }
 
-    /* @internal */
     export const enum EmitFlags {
-        EmitEmitHelpers = 1 << 0,                // Any emit helpers should be written to this node.
-        EmitExportStar = 1 << 1,                 // The export * helper should be written to this node.
-        EmitSuperHelper = 1 << 2,                // Emit the basic _super helper for async methods.
-        EmitAdvancedSuperHelper = 1 << 3,        // Emit the advanced _super helper for async methods.
-        UMDDefine = 1 << 4,                      // This node should be replaced with the UMD define helper.
-        SingleLine = 1 << 5,                     // The contents of this node should be emitted on a single line.
-        AdviseOnEmitNode = 1 << 6,               // The printer should invoke the onEmitNode callback when printing this node.
-        NoSubstitution = 1 << 7,                 // Disables further substitution of an expression.
-        CapturesThis = 1 << 8,                   // The function captures a lexical `this`
-        NoLeadingSourceMap = 1 << 9,             // Do not emit a leading source map location for this node.
-        NoTrailingSourceMap = 1 << 10,           // Do not emit a trailing source map location for this node.
+        SingleLine = 1 << 0,                    // The contents of this node should be emitted on a single line.
+        AdviseOnEmitNode = 1 << 1,              // The printer should invoke the onEmitNode callback when printing this node.
+        NoSubstitution = 1 << 2,                // Disables further substitution of an expression.
+        CapturesThis = 1 << 3,                  // The function captures a lexical `this`
+        NoLeadingSourceMap = 1 << 4,            // Do not emit a leading source map location for this node.
+        NoTrailingSourceMap = 1 << 5,           // Do not emit a trailing source map location for this node.
         NoSourceMap = NoLeadingSourceMap | NoTrailingSourceMap, // Do not emit a source map location for this node.
-        NoNestedSourceMaps = 1 << 11,            // Do not emit source map locations for children of this node.
-        NoTokenLeadingSourceMaps = 1 << 12,      // Do not emit leading source map location for token nodes.
-        NoTokenTrailingSourceMaps = 1 << 13,     // Do not emit trailing source map location for token nodes.
+        NoNestedSourceMaps = 1 << 6,            // Do not emit source map locations for children of this node.
+        NoTokenLeadingSourceMaps = 1 << 7,      // Do not emit leading source map location for token nodes.
+        NoTokenTrailingSourceMaps = 1 << 8,     // Do not emit trailing source map location for token nodes.
         NoTokenSourceMaps = NoTokenLeadingSourceMaps | NoTokenTrailingSourceMaps, // Do not emit source map locations for tokens of this node.
-        NoLeadingComments = 1 << 14,             // Do not emit leading comments for this node.
-        NoTrailingComments = 1 << 15,            // Do not emit trailing comments for this node.
+        NoLeadingComments = 1 << 9,             // Do not emit leading comments for this node.
+        NoTrailingComments = 1 << 10,           // Do not emit trailing comments for this node.
         NoComments = NoLeadingComments | NoTrailingComments, // Do not emit comments for this node.
-        NoNestedComments = 1 << 16,
-        ExportName = 1 << 17,                    // Ensure an export prefix is added for an identifier that points to an exported declaration with a local name (see SymbolFlags.ExportHasLocal).
-        LocalName = 1 << 18,                     // Ensure an export prefix is not added for an identifier that points to an exported declaration.
-        Indented = 1 << 19,                      // Adds an explicit extra indentation level for class and function bodies when printing (used to match old emitter).
-        NoIndentation = 1 << 20,                 // Do not indent the node.
-        AsyncFunctionBody = 1 << 21,
-        ReuseTempVariableScope = 1 << 22,        // Reuse the existing temp variable scope during emit.
-        CustomPrologue = 1 << 23,                // Treat the statement as if it were a prologue directive (NOTE: Prologue directives are *not* transformed).
+        NoNestedComments = 1 << 11,
+        HelperName = 1 << 12,
+        ExportName = 1 << 13,                   // Ensure an export prefix is added for an identifier that points to an exported declaration with a local name (see SymbolFlags.ExportHasLocal).
+        LocalName = 1 << 14,                    // Ensure an export prefix is not added for an identifier that points to an exported declaration.
+        InternalName = 1 << 15,                 // The name is internal to an ES5 class body function.
+        Indented = 1 << 16,                     // Adds an explicit extra indentation level for class and function bodies when printing (used to match old emitter).
+        NoIndentation = 1 << 17,                // Do not indent the node.
+        AsyncFunctionBody = 1 << 18,
+        ReuseTempVariableScope = 1 << 19,       // Reuse the existing temp variable scope during emit.
+        CustomPrologue = 1 << 20,               // Treat the statement as if it were a prologue directive (NOTE: Prologue directives are *not* transformed).
+        NoHoisting = 1 << 21,                   // Do not hoist this declaration in --module system
+        HasEndOfDeclarationMarker = 1 << 22,    // Declaration has an associated NotEmittedStatement to mark the end of the declaration
+        Iterator = 1 << 23,                     // The expression to a `yield*` should be treated as an Iterator when down-leveling, not an Iterable.
+        NoAsciiEscaping = 1 << 24,              // When synthesizing nodes that lack an original node or textSourceNode, we want to write the text on the node with ASCII escaping substitutions.
+    }
+
+    export interface EmitHelper {
+        readonly name: string;      // A unique name for this helper.
+        readonly scoped: boolean;   // Indicates whether the helper MUST be emitted in the current scope.
+        readonly text: string;      // ES3-compatible raw script text.
+        readonly priority?: number; // Helpers with a higher priority are emitted earlier than other helpers on the node.
     }
 
+    /**
+     * Used by the checker, this enum keeps track of external emit helpers that should be type
+     * checked.
+     */
     /* @internal */
-    export const enum EmitContext {
+    export const enum ExternalEmitHelpers {
+        Extends = 1 << 0,           // __extends (used by the ES2015 class transformation)
+        Assign = 1 << 1,            // __assign (used by Jsx and ESNext object spread transformations)
+        Rest = 1 << 2,              // __rest (used by ESNext object rest transformation)
+        Decorate = 1 << 3,          // __decorate (used by TypeScript decorators transformation)
+        Metadata = 1 << 4,          // __metadata (used by TypeScript decorators transformation)
+        Param = 1 << 5,             // __param (used by TypeScript decorators transformation)
+        Awaiter = 1 << 6,           // __awaiter (used by ES2017 async functions transformation)
+        Generator = 1 << 7,         // __generator (used by ES2015 generator transformation)
+        Values = 1 << 8,            // __values (used by ES2015 for..of and yield* transformations)
+        Read = 1 << 9,              // __read (used by ES2015 iterator destructuring transformation)
+        Spread = 1 << 10,           // __spread (used by ES2015 array spread and argument list spread transformations)
+        Await = 1 << 11,            // __await (used by ES2017 async generator transformation)
+        AsyncGenerator = 1 << 12,   // __asyncGenerator (used by ES2017 async generator transformation)
+        AsyncDelegator = 1 << 13,   // __asyncDelegator (used by ES2017 async generator yield* transformation)
+        AsyncValues = 1 << 14,      // __asyncValues (used by ES2017 for..await..of transformation)
+        ExportStar = 1 << 15,       // __exportStar (used by CommonJS/AMD/UMD module transformation)
+
+        // Helpers included by ES2015 for..of
+        ForOfIncludes = Values,
+
+        // Helpers included by ES2017 for..await..of
+        ForAwaitOfIncludes = AsyncValues,
+
+        // Helpers included by ES2017 async generators
+        AsyncGeneratorIncludes = Await | AsyncGenerator,
+
+        // Helpers included by yield* in ES2017 async generators
+        AsyncDelegatorIncludes = Await | AsyncDelegator | AsyncValues,
+
+        // Helpers included by ES2015 spread
+        SpreadIncludes = Read | Spread,
+
+        FirstEmitHelper = Extends,
+        LastEmitHelper = ExportStar
+    }
+
+    export const enum EmitHint {
         SourceFile,         // Emitting a SourceFile
         Expression,         // Emitting an Expression
         IdentifierName,     // Emitting an IdentifierName
         Unspecified,        // Emitting an otherwise unspecified node
     }
 
-    /** Additional context provided to `visitEachChild` */
     /* @internal */
-    export interface LexicalEnvironment {
+    export interface EmitHost extends ScriptReferenceHost {
+        getSourceFiles(): SourceFile[];
+
+        /* @internal */
+        isSourceFileFromExternalLibrary(file: SourceFile): boolean;
+
+        getCommonSourceDirectory(): string;
+        getCanonicalFileName(fileName: string): string;
+        getNewLine(): string;
+
+        isEmitBlocked(emitFileName: string): boolean;
+
+        writeFile: WriteFileCallback;
+    }
+
+    export interface TransformationContext {
+        /*@internal*/ getEmitResolver(): EmitResolver;
+        /*@internal*/ getEmitHost(): EmitHost;
+
+        /** Gets the compiler options supplied to the transformer. */
+        getCompilerOptions(): CompilerOptions;
+
         /** Starts a new lexical environment. */
         startLexicalEnvironment(): void;
 
+        /** Suspends the current lexical environment, usually after visiting a parameter list. */
+        suspendLexicalEnvironment(): void;
+
+        /** Resumes a suspended lexical environment, usually before visiting a function body. */
+        resumeLexicalEnvironment(): void;
+
         /** Ends a lexical environment, returning any declarations. */
         endLexicalEnvironment(): Statement[];
+
+        /** Hoists a function declaration to the containing scope. */
+        hoistFunctionDeclaration(node: FunctionDeclaration): void;
+
+        /** Hoists a variable declaration to the containing scope. */
+        hoistVariableDeclaration(node: Identifier): void;
+
+        /** Records a request for a non-scoped emit helper in the current context. */
+        requestEmitHelper(helper: EmitHelper): void;
+
+        /** Gets and resets the requested non-scoped emit helpers. */
+        readEmitHelpers(): EmitHelper[] | undefined;
+
+        /** Enables expression substitutions in the pretty printer for the provided SyntaxKind. */
+        enableSubstitution(kind: SyntaxKind): void;
+
+        /** Determines whether expression substitutions are enabled for the provided node. */
+        isSubstitutionEnabled(node: Node): boolean;
+
+        /**
+         * Hook used by transformers to substitute expressions just before they
+         * are emitted by the pretty printer.
+         *
+         * NOTE: Transformation hooks should only be modified during `Transformer` initialization,
+         * before returning the `NodeTransformer` callback.
+         */
+        onSubstituteNode: (hint: EmitHint, node: Node) => Node;
+
+        /**
+         * Enables before/after emit notifications in the pretty printer for the provided
+         * SyntaxKind.
+         */
+        enableEmitNotification(kind: SyntaxKind): void;
+
+        /**
+         * Determines whether before/after emit notifications should be raised in the pretty
+         * printer when it emits a node.
+         */
+        isEmitNotificationEnabled(node: Node): boolean;
+
+        /**
+         * Hook used to allow transformers to capture state before or after
+         * the printer emits a node.
+         *
+         * NOTE: Transformation hooks should only be modified during `Transformer` initialization,
+         * before returning the `NodeTransformer` callback.
+         */
+        onEmitNode: (hint: EmitHint, node: Node, emitCallback: (hint: EmitHint, node: Node) => void) => void;
     }
 
+    export interface TransformationResult<T extends Node> {
+        /** Gets the transformed source files. */
+        transformed: T[];
+
+        /** Gets diagnostics for the transformation. */
+        diagnostics?: Diagnostic[];
+
+        /**
+         * Gets a substitute for a node, if one is available; otherwise, returns the original node.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to substitute.
+         */
+        substituteNode(hint: EmitHint, node: Node): Node;
+
+        /**
+         * Emits a node with possible notification.
+         *
+         * @param hint A hint as to the intended usage of the node.
+         * @param node The node to emit.
+         * @param emitCallback A callback used to emit the node.
+         */
+        emitNodeWithNotification(hint: EmitHint, node: Node, emitCallback: (hint: EmitHint, node: Node) => void): void;
+
+        /**
+         * Clean up EmitNode entries on any parse-tree nodes.
+         */
+        dispose(): void;
+    }
+
+    /**
+     * A function that is used to initialize and return a `Transformer` callback, which in turn
+     * will be used to transform one or more nodes.
+     */
+    export type TransformerFactory<T extends Node> = (context: TransformationContext) => Transformer<T>;
+
+    /**
+     * A function that transforms a node.
+     */
+    export type Transformer<T extends Node> = (node: T) => T;
+
+    /**
+     * A function that accepts and possibly transforms a node.
+     */
+    export type Visitor = (node: Node) => VisitResult<Node>;
+
+    export type VisitResult<T extends Node> = T | T[];
+
+    export interface Printer {
+        /**
+         * Print a node and its subtree as-is, without any emit transformations.
+         * @param hint A value indicating the purpose of a node. This is primarily used to
+         * distinguish between an `Identifier` used in an expression position, versus an
+         * `Identifier` used as an `IdentifierName` as part of a declaration. For most nodes you
+         * should just pass `Unspecified`.
+         * @param node The node to print. The node and its subtree are printed as-is, without any
+         * emit transformations.
+         * @param sourceFile A source file that provides context for the node. The source text of
+         * the file is used to emit the original source content for literals and identifiers, while
+         * the identifiers of the source file are used when generating unique names to avoid
+         * collisions.
+         */
+        printNode(hint: EmitHint, node: Node, sourceFile: SourceFile): string;
+        /**
+         * Prints a source file as-is, without any emit transformations.
+         */
+        printFile(sourceFile: SourceFile): string;
+        /**
+         * Prints a bundle of source files as-is, without any emit transformations.
+         */
+        printBundle(bundle: Bundle): string;
+        /*@internal*/ writeNode(hint: EmitHint, node: Node, sourceFile: SourceFile | undefined, writer: EmitTextWriter): void;
+        /*@internal*/ writeFile(sourceFile: SourceFile, writer: EmitTextWriter): void;
+        /*@internal*/ writeBundle(bundle: Bundle, writer: EmitTextWriter): void;
+    }
+
+    export interface PrintHandlers {
+        /**
+         * A hook used by the Printer when generating unique names to avoid collisions with
+         * globally defined names that exist outside of the current source file.
+         */
+        hasGlobalName?(name: string): boolean;
+        /**
+         * A hook used by the Printer to provide notifications prior to emitting a node. A
+         * compatible implementation **must** invoke `emitCallback` with the provided `hint` and
+         * `node` values.
+         * @param hint A hint indicating the intended purpose of the node.
+         * @param node The node to emit.
+         * @param emitCallback A callback that, when invoked, will emit the node.
+         * @example
+         * ```ts
+         * var printer = createPrinter(printerOptions, {
+         *   onEmitNode(hint, node, emitCallback) {
+         *     // set up or track state prior to emitting the node...
+         *     emitCallback(hint, node);
+         *     // restore state after emitting the node...
+         *   }
+         * });
+         * ```
+         */
+        onEmitNode?(hint: EmitHint, node: Node, emitCallback: (hint: EmitHint, node: Node) => void): void;
+        /**
+         * A hook used by the Printer to perform just-in-time substitution of a node. This is
+         * primarily used by node transformations that need to substitute one node for another,
+         * such as replacing `myExportedVar` with `exports.myExportedVar`.
+         * @param hint A hint indicating the intended purpose of the node.
+         * @param node The node to emit.
+         * @example
+         * ```ts
+         * var printer = createPrinter(printerOptions, {
+         *   substituteNode(hint, node) {
+         *     // perform substitution if necessary...
+         *     return node;
+         *   }
+         * });
+         * ```
+         */
+        substituteNode?(hint: EmitHint, node: Node): Node;
+        /*@internal*/ onEmitSourceMapOfNode?: (hint: EmitHint, node: Node, emitCallback: (hint: EmitHint, node: Node) => void) => void;
+        /*@internal*/ onEmitSourceMapOfToken?: (node: Node, token: SyntaxKind, pos: number, emitCallback: (token: SyntaxKind, pos: number) => number) => number;
+        /*@internal*/ onEmitSourceMapOfPosition?: (pos: number) => void;
+        /*@internal*/ onEmitHelpers?: (node: Node, writeLines: (text: string) => void) => void;
+        /*@internal*/ onSetSourceFile?: (node: SourceFile) => void;
+        /*@internal*/ onBeforeEmitNodeArray?: (nodes: NodeArray<any>) => void;
+        /*@internal*/ onAfterEmitNodeArray?: (nodes: NodeArray<any>) => void;
+        /*@internal*/ onBeforeEmitToken?: (node: Node) => void;
+        /*@internal*/ onAfterEmitToken?: (node: Node) => void;
+    }
+
+    export interface PrinterOptions {
+        removeComments?: boolean;
+        newLine?: NewLineKind;
+        /*@internal*/ sourceMap?: boolean;
+        /*@internal*/ inlineSourceMap?: boolean;
+        /*@internal*/ extendedDiagnostics?: boolean;
+    }
+
+    /*@internal*/
+    export interface EmitTextWriter {
+        write(s: string): void;
+        writeTextOfNode(text: string, node: Node): void;
+        writeLine(): void;
+        increaseIndent(): void;
+        decreaseIndent(): void;
+        getText(): string;
+        rawWrite(s: string): void;
+        writeLiteral(s: string): void;
+        getTextPos(): number;
+        getLine(): number;
+        getColumn(): number;
+        getIndent(): number;
+        isAtStartOfLine(): boolean;
+        reset(): void;
+    }
 
     export interface TextSpan {
         start: number;
diff --git a/src/compiler/utilities.ts b/src/compiler/utilities.ts
index 1a4d95f..c882780 100644
--- a/src/compiler/utilities.ts
+++ b/src/compiler/utilities.ts
@@ -1,4 +1,4 @@
-/// <reference path="sys.ts" />
+/// <reference path="sys.ts" />
 
 /* @internal */
 namespace ts {
@@ -11,12 +11,12 @@ namespace ts {
         isTypeReferenceDirective?: boolean;
     }
 
-    export function getDeclarationOfKind(symbol: Symbol, kind: SyntaxKind): Declaration {
+    export function getDeclarationOfKind<T extends Declaration>(symbol: Symbol, kind: T["kind"]): T {
         const declarations = symbol.declarations;
         if (declarations) {
             for (const declaration of declarations) {
                 if (declaration.kind === kind) {
-                    return declaration;
+                    return declaration as T;
                 }
             }
         }
@@ -24,23 +24,22 @@ namespace ts {
         return undefined;
     }
 
-    export interface StringSymbolWriter extends SymbolWriter {
-        string(): string;
+    export function findDeclaration<T extends Declaration>(symbol: Symbol, predicate: (node: Declaration) => node is T): T | undefined;
+    export function findDeclaration(symbol: Symbol, predicate: (node: Declaration) => boolean): Declaration | undefined;
+    export function findDeclaration(symbol: Symbol, predicate: (node: Declaration) => boolean): Declaration | undefined {
+        const declarations = symbol.declarations;
+        if (declarations) {
+            for (const declaration of declarations) {
+                if (predicate(declaration)) {
+                    return declaration;
+                }
+            }
+        }
+        return undefined;
     }
 
-    export interface EmitHost extends ScriptReferenceHost {
-        getSourceFiles(): SourceFile[];
-
-        /* @internal */
-        isSourceFileFromExternalLibrary(file: SourceFile): boolean;
-
-        getCommonSourceDirectory(): string;
-        getCanonicalFileName(fileName: string): string;
-        getNewLine(): string;
-
-        isEmitBlocked(emitFileName: string): boolean;
-
-        writeFile: WriteFileCallback;
+    export interface StringSymbolWriter extends SymbolWriter {
+        string(): string;
     }
 
     // Pool writers to avoid needing to allocate them for every symbol we write.
@@ -58,16 +57,18 @@ namespace ts {
                 writeSpace: writeText,
                 writeStringLiteral: writeText,
                 writeParameter: writeText,
+                writeProperty: writeText,
                 writeSymbol: writeText,
 
                 // Completely ignore indentation for string writers.  And map newlines to
                 // a single space.
                 writeLine: () => str += " ",
-                increaseIndent: () => { },
-                decreaseIndent: () => { },
+                increaseIndent: noop,
+                decreaseIndent: noop,
                 clear: () => str = "",
-                trackSymbol: () => { },
-                reportInaccessibleThisError: () => { }
+                trackSymbol: noop,
+                reportInaccessibleThisError: noop,
+                reportPrivateInBaseOfClassExpression: noop,
             };
         }
 
@@ -83,39 +84,20 @@ namespace ts {
         return node.end - node.pos;
     }
 
-    export function arrayIsEqualTo<T>(array1: ReadonlyArray<T>, array2: ReadonlyArray<T>, equaler?: (a: T, b: T) => boolean): boolean {
-        if (!array1 || !array2) {
-            return array1 === array2;
-        }
-
-        if (array1.length !== array2.length) {
-            return false;
-        }
-
-        for (let i = 0; i < array1.length; i++) {
-            const equals = equaler ? equaler(array1[i], array2[i]) : array1[i] === array2[i];
-            if (!equals) {
-                return false;
-            }
-        }
-
-        return true;
-    }
-
     export function hasResolvedModule(sourceFile: SourceFile, moduleNameText: string): boolean {
-        return !!(sourceFile && sourceFile.resolvedModules && sourceFile.resolvedModules[moduleNameText]);
+        return !!(sourceFile && sourceFile.resolvedModules && sourceFile.resolvedModules.get(moduleNameText));
     }
 
-    export function getResolvedModule(sourceFile: SourceFile, moduleNameText: string): ResolvedModule {
-        return hasResolvedModule(sourceFile, moduleNameText) ? sourceFile.resolvedModules[moduleNameText] : undefined;
+    export function getResolvedModule(sourceFile: SourceFile, moduleNameText: string): ResolvedModuleFull {
+        return hasResolvedModule(sourceFile, moduleNameText) ? sourceFile.resolvedModules.get(moduleNameText) : undefined;
     }
 
-    export function setResolvedModule(sourceFile: SourceFile, moduleNameText: string, resolvedModule: ResolvedModule): void {
+    export function setResolvedModule(sourceFile: SourceFile, moduleNameText: string, resolvedModule: ResolvedModuleFull): void {
         if (!sourceFile.resolvedModules) {
-            sourceFile.resolvedModules = createMap<ResolvedModule>();
+            sourceFile.resolvedModules = createMap<ResolvedModuleFull>();
         }
 
-        sourceFile.resolvedModules[moduleNameText] = resolvedModule;
+        sourceFile.resolvedModules.set(moduleNameText, resolvedModule);
     }
 
     export function setResolvedTypeReferenceDirective(sourceFile: SourceFile, typeReferenceDirectiveName: string, resolvedTypeReferenceDirective: ResolvedTypeReferenceDirective): void {
@@ -123,12 +105,14 @@ namespace ts {
             sourceFile.resolvedTypeReferenceDirectiveNames = createMap<ResolvedTypeReferenceDirective>();
         }
 
-        sourceFile.resolvedTypeReferenceDirectiveNames[typeReferenceDirectiveName] = resolvedTypeReferenceDirective;
+        sourceFile.resolvedTypeReferenceDirectiveNames.set(typeReferenceDirectiveName, resolvedTypeReferenceDirective);
     }
 
     /* @internal */
-    export function moduleResolutionIsEqualTo(oldResolution: ResolvedModule, newResolution: ResolvedModule): boolean {
-        return oldResolution.resolvedFileName === newResolution.resolvedFileName && oldResolution.isExternalLibraryImport === newResolution.isExternalLibraryImport;
+    export function moduleResolutionIsEqualTo(oldResolution: ResolvedModuleFull, newResolution: ResolvedModuleFull): boolean {
+        return oldResolution.isExternalLibraryImport === newResolution.isExternalLibraryImport &&
+            oldResolution.extension === newResolution.extension &&
+            oldResolution.resolvedFileName === newResolution.resolvedFileName;
     }
 
     /* @internal */
@@ -138,12 +122,11 @@ namespace ts {
 
     /* @internal */
     export function hasChangesInResolutions<T>(names: string[], newResolutions: T[], oldResolutions: Map<T>, comparer: (oldResolution: T, newResolution: T) => boolean): boolean {
-        if (names.length !== newResolutions.length) {
-            return false;
-        }
+        Debug.assert(names.length === newResolutions.length);
+
         for (let i = 0; i < names.length; i++) {
             const newResolution = newResolutions[i];
-            const oldResolution = oldResolutions && oldResolutions[names[i]];
+            const oldResolution = oldResolutions && oldResolutions.get(names[i]);
             const changed =
                 oldResolution
                     ? !newResolution || !comparer(oldResolution, newResolution)
@@ -200,7 +183,7 @@ namespace ts {
         return false;
     }
 
-    export function getStartPositionOfLine(line: number, sourceFile: SourceFile): number {
+    export function getStartPositionOfLine(line: number, sourceFile: SourceFileLike): number {
         Debug.assert(line >= 0);
         return getLineStarts(sourceFile)[line];
     }
@@ -209,7 +192,7 @@ namespace ts {
     export function nodePosToString(node: Node): string {
         const file = getSourceFileOfNode(node);
         const loc = getLineAndCharacterOfPosition(file, node.pos);
-        return `${ file.fileName }(${ loc.line + 1 },${ loc.character + 1 })`;
+        return `${file.fileName}(${loc.line + 1},${loc.character + 1})`;
     }
 
     export function getStartPosOfNode(node: Node): number {
@@ -220,7 +203,7 @@ namespace ts {
         return value !== undefined;
     }
 
-    export function getEndLinePosition(line: number, sourceFile: SourceFile): number {
+    export function getEndLinePosition(line: number, sourceFile: SourceFileLike): number {
         Debug.assert(line >= 0);
         const lineStarts = getLineStarts(sourceFile);
 
@@ -271,7 +254,7 @@ namespace ts {
         return !nodeIsMissing(node);
     }
 
-    export function getTokenPosOfNode(node: Node, sourceFile?: SourceFile, includeJsDocComment?: boolean): number {
+    export function getTokenPosOfNode(node: Node, sourceFile?: SourceFileLike, includeJsDoc?: boolean): number {
         // With nodes that have no width (i.e. 'Missing' nodes), we actually *don't*
         // want to skip trivia because this will launch us forward to the next token.
         if (nodeIsMissing(node)) {
@@ -282,8 +265,8 @@ namespace ts {
             return skipTrivia((sourceFile || getSourceFileOfNode(node)).text, node.pos, /*stopAfterLineBreak*/ false, /*stopAtComments*/ true);
         }
 
-        if (includeJsDocComment && node.jsDocComments && node.jsDocComments.length > 0) {
-            return getTokenPosOfNode(node.jsDocComments[0]);
+        if (includeJsDoc && node.jsDoc && node.jsDoc.length > 0) {
+            return getTokenPosOfNode(node.jsDoc[0]);
         }
 
         // For a syntax list, it is possible that one of its children has JSDocComment nodes, while
@@ -291,21 +274,13 @@ namespace ts {
         // trivia for the list, we may have skipped the JSDocComment as well. So we should process its
         // first child to determine the actual position of its first token.
         if (node.kind === SyntaxKind.SyntaxList && (<SyntaxList>node)._children.length > 0) {
-            return getTokenPosOfNode((<SyntaxList>node)._children[0], sourceFile, includeJsDocComment);
+            return getTokenPosOfNode((<SyntaxList>node)._children[0], sourceFile, includeJsDoc);
         }
 
         return skipTrivia((sourceFile || getSourceFileOfNode(node)).text, node.pos);
     }
 
-    export function isJSDocNode(node: Node) {
-        return node.kind >= SyntaxKind.FirstJSDocNode && node.kind <= SyntaxKind.LastJSDocNode;
-    }
-
-    export function isJSDocTag(node: Node) {
-        return node.kind >= SyntaxKind.FirstJSDocTagNode && node.kind <= SyntaxKind.LastJSDocTagNode;
-    }
-
-    export function getNonDecoratorTokenPosOfNode(node: Node, sourceFile?: SourceFile): number {
+    export function getNonDecoratorTokenPosOfNode(node: Node, sourceFile?: SourceFileLike): number {
         if (nodeIsMissing(node) || !node.decorators) {
             return getTokenPosOfNode(node, sourceFile);
         }
@@ -334,36 +309,36 @@ namespace ts {
         return getSourceTextOfNodeFromSourceFile(getSourceFileOfNode(node), node, includeTrivia);
     }
 
-    export function getLiteralText(node: LiteralLikeNode, sourceFile: SourceFile, languageVersion: ScriptTarget) {
-        // Any template literal or string literal with an extended escape
-        // (e.g. "\u{0067}") will need to be downleveled as a escaped string literal.
-        if (languageVersion < ScriptTarget.ES6 && (isTemplateLiteralKind(node.kind) || node.hasExtendedUnicodeEscape)) {
-            return getQuotedEscapedLiteralText('"', node.text, '"');
-        }
+    /**
+     * Gets flags that control emit behavior of a node.
+     */
+    export function getEmitFlags(node: Node): EmitFlags | undefined {
+        const emitNode = node.emitNode;
+        return emitNode && emitNode.flags;
+    }
 
+    export function getLiteralText(node: LiteralLikeNode, sourceFile: SourceFile) {
         // If we don't need to downlevel and we can reach the original source text using
         // the node's parent reference, then simply get the text as it was originally written.
         if (!nodeIsSynthesized(node) && node.parent) {
-            const text = getSourceTextOfNodeFromSourceFile(sourceFile, node);
-            if (languageVersion < ScriptTarget.ES6 && isBinaryOrOctalIntegerLiteral(node, text)) {
-                return node.text;
-            }
-            return text;
+            return getSourceTextOfNodeFromSourceFile(sourceFile, node);
         }
 
+        const escapeText = getEmitFlags(node) & EmitFlags.NoAsciiEscaping ? escapeString : escapeNonAsciiString;
+
         // If we can't reach the original source text, use the canonical form if it's a number,
-        // or an escaped quoted form of the original text if it's string-like.
+        // or a (possibly escaped) quoted form of the original text if it's string-like.
         switch (node.kind) {
             case SyntaxKind.StringLiteral:
-                return getQuotedEscapedLiteralText('"', node.text, '"');
+                return '"' + escapeText(node.text) + '"';
             case SyntaxKind.NoSubstitutionTemplateLiteral:
-                return getQuotedEscapedLiteralText("`", node.text, "`");
+                return "`" + escapeText(node.text) + "`";
             case SyntaxKind.TemplateHead:
-                return getQuotedEscapedLiteralText("`", node.text, "${");
+                return "`" + escapeText(node.text) + "${";
             case SyntaxKind.TemplateMiddle:
-                return getQuotedEscapedLiteralText("}", node.text, "${");
+                return "}" + escapeText(node.text) + "${";
             case SyntaxKind.TemplateTail:
-                return getQuotedEscapedLiteralText("}", node.text, "`");
+                return "}" + escapeText(node.text) + "`";
             case SyntaxKind.NumericLiteral:
                 return node.text;
         }
@@ -371,21 +346,8 @@ namespace ts {
         Debug.fail(`Literal kind '${node.kind}' not accounted for.`);
     }
 
-    export function isBinaryOrOctalIntegerLiteral(node: LiteralLikeNode, text: string) {
-        if (node.kind === SyntaxKind.NumericLiteral && text.length > 1) {
-            switch (text.charCodeAt(1)) {
-                case CharacterCodes.b:
-                case CharacterCodes.B:
-                case CharacterCodes.o:
-                case CharacterCodes.O:
-                    return true;
-            }
-        }
-        return false;
-    }
-
-    function getQuotedEscapedLiteralText(leftQuote: string, text: string, rightQuote: string) {
-        return leftQuote + escapeNonAsciiCharacters(escapeString(text)) + rightQuote;
+    export function getTextOfConstantValue(value: string | number) {
+        return typeof value === "string" ? '"' + escapeNonAsciiString(value) + '"' : "" + value;
     }
 
     // Add an extra underscore to identifiers that start with two underscores to avoid issues with magic names like '__proto__'
@@ -393,11 +355,6 @@ namespace ts {
         return identifier.length >= 2 && identifier.charCodeAt(0) === CharacterCodes._ && identifier.charCodeAt(1) === CharacterCodes._ ? "_" + identifier : identifier;
     }
 
-    // Remove extra underscore from escaped identifier
-    export function unescapeIdentifier(identifier: string): string {
-        return identifier.length >= 3 && identifier.charCodeAt(0) === CharacterCodes._ && identifier.charCodeAt(1) === CharacterCodes._ && identifier.charCodeAt(2) === CharacterCodes._ ? identifier.substr(1) : identifier;
-    }
-
     // Make an identifier from an external module name by extracting the string after the last "/" and replacing
     // all non-alphanumeric characters with underscores
     export function makeIdentifierFromModuleName(moduleName: string): string {
@@ -406,7 +363,12 @@ namespace ts {
 
     export function isBlockOrCatchScoped(declaration: Declaration) {
         return (getCombinedNodeFlags(declaration) & NodeFlags.BlockScoped) !== 0 ||
-            isCatchClauseVariableDeclaration(declaration);
+            isCatchClauseVariableDeclarationOrBindingElement(declaration);
+    }
+
+    export function isCatchClauseVariableDeclarationOrBindingElement(declaration: Declaration) {
+        const node = getRootDeclaration(declaration);
+        return node.kind === SyntaxKind.VariableDeclaration && node.parent.kind === SyntaxKind.CatchClause;
     }
 
     export function isAmbientModule(node: Node): boolean {
@@ -414,13 +376,14 @@ namespace ts {
             ((<ModuleDeclaration>node).name.kind === SyntaxKind.StringLiteral || isGlobalScopeAugmentation(<ModuleDeclaration>node));
     }
 
+    /** Given a symbol for a module, checks that it is a shorthand ambient module. */
     export function isShorthandAmbientModuleSymbol(moduleSymbol: Symbol): boolean {
         return isShorthandAmbientModule(moduleSymbol.valueDeclaration);
     }
 
     function isShorthandAmbientModule(node: Node): boolean {
         // The only kind of module that can be missing a body is a shorthand ambient module.
-        return node.kind === SyntaxKind.ModuleDeclaration && (!(<ModuleDeclaration>node).body);
+        return node && node.kind === SyntaxKind.ModuleDeclaration && (!(<ModuleDeclaration>node).body);
     }
 
     export function isBlockScopedContainerTopLevel(node: Node): boolean {
@@ -449,8 +412,12 @@ namespace ts {
         return false;
     }
 
+    export function isEffectiveExternalModule(node: SourceFile, compilerOptions: CompilerOptions) {
+        return isExternalModule(node) || compilerOptions.isolatedModules;
+    }
+
     export function isBlockScope(node: Node, parentNode: Node) {
-        switch (node.kind)  {
+        switch (node.kind) {
             case SyntaxKind.SourceFile:
             case SyntaxKind.CaseBlock:
             case SyntaxKind.CatchClause:
@@ -489,13 +456,6 @@ namespace ts {
         }
     }
 
-    export function isCatchClauseVariableDeclaration(declaration: Declaration) {
-        return declaration &&
-            declaration.kind === SyntaxKind.VariableDeclaration &&
-            declaration.parent &&
-            declaration.parent.kind === SyntaxKind.CatchClause;
-    }
-
     // Return display name of an identifier
     // Computed property names will just be emitted as "[<expr>]", where <expr> is the source
     // text of the expression in the computed property.
@@ -503,8 +463,43 @@ namespace ts {
         return getFullWidth(name) === 0 ? "(Missing)" : getTextOfNode(name);
     }
 
-    export function createDiagnosticForNode(node: Node, message: DiagnosticMessage, arg0?: any, arg1?: any, arg2?: any): Diagnostic {
+    export function getNameFromIndexInfo(info: IndexInfo): string | undefined {
+        return info.declaration ? declarationNameToString(info.declaration.parameters[0].name) : undefined;
+    }
+
+    export function getTextOfPropertyName(name: PropertyName): string {
+        switch (name.kind) {
+            case SyntaxKind.Identifier:
+                return (<Identifier>name).text;
+            case SyntaxKind.StringLiteral:
+            case SyntaxKind.NumericLiteral:
+                return (<LiteralExpression>name).text;
+            case SyntaxKind.ComputedPropertyName:
+                if (isStringOrNumericLiteral((<ComputedPropertyName>name).expression)) {
+                    return (<LiteralExpression>(<ComputedPropertyName>name).expression).text;
+                }
+        }
+
+        return undefined;
+    }
+
+    export function entityNameToString(name: EntityNameOrEntityNameExpression): string {
+        switch (name.kind) {
+            case SyntaxKind.Identifier:
+                return getFullWidth(name) === 0 ? unescapeIdentifier((<Identifier>name).text) : getTextOfNode(name);
+            case SyntaxKind.QualifiedName:
+                return entityNameToString((<QualifiedName>name).left) + "." + entityNameToString((<QualifiedName>name).right);
+            case SyntaxKind.PropertyAccessExpression:
+                return entityNameToString((<PropertyAccessEntityNameExpression>name).expression) + "." + entityNameToString((<PropertyAccessEntityNameExpression>name).name);
+        }
+    }
+
+    export function createDiagnosticForNode(node: Node, message: DiagnosticMessage, arg0?: string | number, arg1?: string | number, arg2?: string | number): Diagnostic {
         const sourceFile = getSourceFileOfNode(node);
+        return createDiagnosticForNodeInSourceFile(sourceFile, node, message, arg0, arg1, arg2);
+    }
+
+    export function createDiagnosticForNodeInSourceFile(sourceFile: SourceFile, node: Node, message: DiagnosticMessage, arg0?: string | number, arg1?: string | number, arg2?: string | number): Diagnostic {
         const span = getErrorSpanForNode(sourceFile, node);
         return createFileDiagnostic(sourceFile, span.start, span.length, message, arg0, arg1, arg2);
     }
@@ -547,7 +542,7 @@ namespace ts {
         let errorNode = node;
         switch (node.kind) {
             case SyntaxKind.SourceFile:
-                let pos = skipTrivia(sourceFile.text, 0, /*stopAfterLineBreak*/ false);
+                const pos = skipTrivia(sourceFile.text, 0, /*stopAfterLineBreak*/ false);
                 if (pos === sourceFile.text.length) {
                     // file is empty - return span for the beginning of the file
                     return createTextSpan(0, 0);
@@ -569,7 +564,7 @@ namespace ts {
             case SyntaxKind.GetAccessor:
             case SyntaxKind.SetAccessor:
             case SyntaxKind.TypeAliasDeclaration:
-                errorNode = (<Declaration>node).name;
+                errorNode = (<NamedDeclaration>node).name;
                 break;
             case SyntaxKind.ArrowFunction:
                 return getErrorSpanForArrowFunction(sourceFile, <ArrowFunction>node);
@@ -592,10 +587,6 @@ namespace ts {
         return (file.externalModuleIndicator || file.commonJsModuleIndicator) !== undefined;
     }
 
-    export function isDeclarationFile(file: SourceFile): boolean {
-        return file.isDeclarationFile;
-    }
-
     export function isConstEnumDeclaration(node: Node): boolean {
         return node.kind === SyntaxKind.EnumDeclaration && isConst(node);
     }
@@ -609,12 +600,17 @@ namespace ts {
         return !!(getCombinedNodeFlags(node) & NodeFlags.Let);
     }
 
-    export function isSuperCallExpression(n: Node): boolean {
+    export function isSuperCall(n: Node): n is SuperCall {
         return n.kind === SyntaxKind.CallExpression && (<CallExpression>n).expression.kind === SyntaxKind.SuperKeyword;
     }
 
-    export function isPrologueDirective(node: Node): boolean {
-        return node.kind === SyntaxKind.ExpressionStatement && (<ExpressionStatement>node).expression.kind === SyntaxKind.StringLiteral;
+    export function isImportCall(n: Node): n is ImportCall {
+        return n.kind === SyntaxKind.CallExpression && (<CallExpression>n).expression.kind === SyntaxKind.ImportKeyword;
+    }
+
+    export function isPrologueDirective(node: Node): node is PrologueDirective {
+        return node.kind === SyntaxKind.ExpressionStatement
+            && (<ExpressionStatement>node).expression.kind === SyntaxKind.StringLiteral;
     }
 
     export function getLeadingCommentRangesOfNode(node: Node, sourceFileOfNode: SourceFile) {
@@ -625,25 +621,18 @@ namespace ts {
         return getLeadingCommentRanges(text, node.pos);
     }
 
-    export function getJsDocComments(node: Node, sourceFileOfNode: SourceFile) {
-        return getJsDocCommentsFromText(node, sourceFileOfNode.text);
-    }
-
-    export function getJsDocCommentsFromText(node: Node, text: string) {
+    export function getJSDocCommentRanges(node: Node, text: string) {
         const commentRanges = (node.kind === SyntaxKind.Parameter ||
-                               node.kind === SyntaxKind.TypeParameter ||
-                               node.kind === SyntaxKind.FunctionExpression ||
-                               node.kind === SyntaxKind.ArrowFunction) ?
+            node.kind === SyntaxKind.TypeParameter ||
+            node.kind === SyntaxKind.FunctionExpression ||
+            node.kind === SyntaxKind.ArrowFunction) ?
             concatenate(getTrailingCommentRanges(text, node.pos), getLeadingCommentRanges(text, node.pos)) :
             getLeadingCommentRangesOfNodeFromText(node, text);
-        return filter(commentRanges, isJsDocComment);
-
-        function isJsDocComment(comment: CommentRange) {
-            // True if the comment starts with '/**' but not if it is '/**/'
-            return text.charCodeAt(comment.pos + 1) === CharacterCodes.asterisk &&
-                text.charCodeAt(comment.pos + 2) === CharacterCodes.asterisk &&
-                text.charCodeAt(comment.pos + 3) !== CharacterCodes.slash;
-        }
+        // True if the comment starts with '/**' but not if it is '/**/'
+        return filter(commentRanges, comment =>
+            text.charCodeAt(comment.pos + 1) === CharacterCodes.asterisk &&
+            text.charCodeAt(comment.pos + 2) === CharacterCodes.asterisk &&
+            text.charCodeAt(comment.pos + 3) !== CharacterCodes.slash);
     }
 
     export let fullTripleSlashReferencePathRegEx = /^(\/\/\/\s*<reference\s+path\s*=\s*)('|")(.+?)\2.*?\/>/;
@@ -682,10 +671,11 @@ namespace ts {
                 // At this point, node is either a qualified name or an identifier
                 Debug.assert(node.kind === SyntaxKind.Identifier || node.kind === SyntaxKind.QualifiedName || node.kind === SyntaxKind.PropertyAccessExpression,
                     "'node' was expected to be a qualified name, identifier or property access in 'isPartOfTypeNode'.");
+                // falls through
             case SyntaxKind.QualifiedName:
             case SyntaxKind.PropertyAccessExpression:
             case SyntaxKind.ThisKeyword:
-                let parent = node.parent;
+                const parent = node.parent;
                 if (parent.kind === SyntaxKind.TypeQuery) {
                     return false;
                 }
@@ -693,8 +683,8 @@ namespace ts {
                 //
                 //     let a: A.B.C;
                 //
-                // Calling isPartOfTypeNode would consider the qualified name A.B a type node. Only C or
-                // A.B.C is a type node.
+                // Calling isPartOfTypeNode would consider the qualified name A.B a type node.
+                // Only C and A.B.C are type nodes.
                 if (SyntaxKind.FirstTypeNode <= parent.kind && parent.kind <= SyntaxKind.LastTypeNode) {
                     return true;
                 }
@@ -735,6 +725,16 @@ namespace ts {
         return false;
     }
 
+    export function isChildOfNodeWithKind(node: Node, kind: SyntaxKind): boolean {
+        while (node) {
+            if (node.kind === kind) {
+                return true;
+            }
+            node = node.parent;
+        }
+        return false;
+    }
+
     // Warning: This has the same semantics as the forEach family of functions,
     //          in that traversal terminates in the event that 'visitor' supplies a truthy value.
     export function forEachReturnStatement<T>(body: Block, visitor: (stmt: ReturnStatement) => T): T {
@@ -773,10 +773,11 @@ namespace ts {
             switch (node.kind) {
                 case SyntaxKind.YieldExpression:
                     visitor(<YieldExpression>node);
-                    let operand = (<YieldExpression>node).expression;
+                    const operand = (<YieldExpression>node).expression;
                     if (operand) {
                         traverse(operand);
                     }
+                    return;
                 case SyntaxKind.EnumDeclaration:
                 case SyntaxKind.InterfaceDeclaration:
                 case SyntaxKind.ModuleDeclaration:
@@ -806,6 +807,23 @@ namespace ts {
         }
     }
 
+    /**
+     * Gets the most likely element type for a TypeNode. This is not an exhaustive test
+     * as it assumes a rest argument can only be an array type (either T[], or Array<T>).
+     *
+     * @param node The type node.
+     */
+    export function getRestParameterElementType(node: TypeNode) {
+        if (node && node.kind === SyntaxKind.ArrayType) {
+            return (<ArrayTypeNode>node).elementType;
+        }
+        else if (node && node.kind === SyntaxKind.TypeReference) {
+            return singleOrUndefined((<TypeReferenceNode>node).typeArguments);
+        }
+        else {
+            return undefined;
+        }
+    }
 
     export function isVariableLike(node: Node): node is VariableLikeDeclaration {
         if (node) {
@@ -824,39 +842,6 @@ namespace ts {
         return false;
     }
 
-    export function isAccessor(node: Node): node is AccessorDeclaration {
-        return node && (node.kind === SyntaxKind.GetAccessor || node.kind === SyntaxKind.SetAccessor);
-    }
-
-    export function isClassLike(node: Node): node is ClassLikeDeclaration {
-        return node && (node.kind === SyntaxKind.ClassDeclaration || node.kind === SyntaxKind.ClassExpression);
-    }
-
-    export function isFunctionLike(node: Node): node is FunctionLikeDeclaration {
-        return node && isFunctionLikeKind(node.kind);
-    }
-
-    export function isFunctionLikeKind(kind: SyntaxKind): boolean {
-        switch (kind) {
-            case SyntaxKind.Constructor:
-            case SyntaxKind.FunctionExpression:
-            case SyntaxKind.FunctionDeclaration:
-            case SyntaxKind.ArrowFunction:
-            case SyntaxKind.MethodDeclaration:
-            case SyntaxKind.MethodSignature:
-            case SyntaxKind.GetAccessor:
-            case SyntaxKind.SetAccessor:
-            case SyntaxKind.CallSignature:
-            case SyntaxKind.ConstructSignature:
-            case SyntaxKind.IndexSignature:
-            case SyntaxKind.FunctionType:
-            case SyntaxKind.ConstructorType:
-                return true;
-        }
-
-        return false;
-    }
-
     export function introducesArgumentsExoticObject(node: Node) {
         switch (node.kind) {
             case SyntaxKind.MethodDeclaration:
@@ -871,22 +856,18 @@ namespace ts {
         return false;
     }
 
-    export function isIterationStatement(node: Node, lookInLabeledStatements: boolean): node is IterationStatement {
-        switch (node.kind) {
-            case SyntaxKind.ForStatement:
-            case SyntaxKind.ForInStatement:
-            case SyntaxKind.ForOfStatement:
-            case SyntaxKind.DoStatement:
-            case SyntaxKind.WhileStatement:
-                return true;
-            case SyntaxKind.LabeledStatement:
-                return lookInLabeledStatements && isIterationStatement((<LabeledStatement>node).statement, lookInLabeledStatements);
+    export function unwrapInnermostStatementOfLabel(node: LabeledStatement, beforeUnwrapLabelCallback?: (node: LabeledStatement) => void) {
+        while (true) {
+            if (beforeUnwrapLabelCallback) {
+                beforeUnwrapLabelCallback(node);
+            }
+            if (node.statement.kind !== SyntaxKind.LabeledStatement) {
+                return node.statement;
+            }
+            node = <LabeledStatement>node.statement;
         }
-
-        return false;
     }
 
-
     export function isFunctionBlock(node: Node) {
         return node && node.kind === SyntaxKind.Block && isFunctionLike(node.parent);
     }
@@ -895,6 +876,12 @@ namespace ts {
         return node && node.kind === SyntaxKind.MethodDeclaration && node.parent.kind === SyntaxKind.ObjectLiteralExpression;
     }
 
+    export function isObjectLiteralOrClassExpressionMethod(node: Node): node is MethodDeclaration {
+        return node.kind === SyntaxKind.MethodDeclaration &&
+            (node.parent.kind === SyntaxKind.ObjectLiteralExpression ||
+                node.parent.kind === SyntaxKind.ClassExpression);
+    }
+
     export function isIdentifierTypePredicate(predicate: TypePredicate): predicate is IdentifierTypePredicate {
         return predicate && predicate.kind === TypePredicateKind.Identifier;
     }
@@ -903,6 +890,15 @@ namespace ts {
         return predicate && predicate.kind === TypePredicateKind.This;
     }
 
+    export function getPropertyAssignment(objectLiteral: ObjectLiteralExpression, key: string, key2?: string) {
+        return <PropertyAssignment[]>filter(objectLiteral.properties, property => {
+            if (property.kind === SyntaxKind.PropertyAssignment) {
+                const propName = getTextOfPropertyName(property.name);
+                return key === propName || (key2 && key2 === propName);
+            }
+        });
+    }
+
     export function getContainingFunction(node: Node): FunctionLikeDeclaration {
         while (true) {
             node = node.parent;
@@ -960,7 +956,7 @@ namespace ts {
                     if (!includeArrowFunctions) {
                         continue;
                     }
-                // Fall through
+                    // falls through
                 case SyntaxKind.FunctionDeclaration:
                 case SyntaxKind.FunctionExpression:
                 case SyntaxKind.ModuleDeclaration:
@@ -981,14 +977,28 @@ namespace ts {
         }
     }
 
+    export function getNewTargetContainer(node: Node) {
+        const container = getThisContainer(node, /*includeArrowFunctions*/ false);
+        if (container) {
+            switch (container.kind) {
+                case SyntaxKind.Constructor:
+                case SyntaxKind.FunctionDeclaration:
+                case SyntaxKind.FunctionExpression:
+                    return container;
+            }
+        }
+
+        return undefined;
+    }
+
     /**
-      * Given an super call/property node, returns the closest node where
-      * - a super call/property access is legal in the node and not legal in the parent node the node.
-      *   i.e. super call is legal in constructor but not legal in the class body.
-      * - the container is an arrow function (so caller might need to call getSuperContainer again in case it needs to climb higher)
-      * - a super call/property is definitely illegal in the container (but might be legal in some subnode)
-      *   i.e. super property access is illegal in function declaration but can be legal in the statement list
-      */
+     * Given an super call/property node, returns the closest node where
+     * - a super call/property access is legal in the node and not legal in the parent node the node.
+     *   i.e. super call is legal in constructor but not legal in the class body.
+     * - the container is an arrow function (so caller might need to call getSuperContainer again in case it needs to climb higher)
+     * - a super call/property is definitely illegal in the container (but might be legal in some subnode)
+     *   i.e. super property access is illegal in function declaration but can be legal in the statement list
+     */
     export function getSuperContainer(node: Node, stopOnFunctions: boolean): Node {
         while (true) {
             node = node.parent;
@@ -1005,6 +1015,7 @@ namespace ts {
                     if (!stopOnFunctions) {
                         continue;
                     }
+                    // falls through
                 case SyntaxKind.PropertyDeclaration:
                 case SyntaxKind.PropertySignature:
                 case SyntaxKind.MethodDeclaration:
@@ -1047,45 +1058,38 @@ namespace ts {
     /**
      * Determines whether a node is a property or element access expression for super.
      */
-    export function isSuperProperty(node: Node): node is (PropertyAccessExpression | ElementAccessExpression) {
+    export function isSuperProperty(node: Node): node is SuperProperty {
         const kind = node.kind;
         return (kind === SyntaxKind.PropertyAccessExpression || kind === SyntaxKind.ElementAccessExpression)
             && (<PropertyAccessExpression | ElementAccessExpression>node).expression.kind === SyntaxKind.SuperKeyword;
     }
 
     export function getEntityNameFromTypeNode(node: TypeNode): EntityNameOrEntityNameExpression {
-        if (node) {
-            switch (node.kind) {
-                case SyntaxKind.TypeReference:
-                    return (<TypeReferenceNode>node).typeName;
-                case SyntaxKind.ExpressionWithTypeArguments:
-                    Debug.assert(isEntityNameExpression((<ExpressionWithTypeArguments>node).expression));
-                    return <EntityNameExpression>(<ExpressionWithTypeArguments>node).expression;
-                case SyntaxKind.Identifier:
-                case SyntaxKind.QualifiedName:
-                    return (<EntityName><Node>node);
-            }
-        }
+        switch (node.kind) {
+            case SyntaxKind.TypeReference:
+            case SyntaxKind.JSDocTypeReference:
+                return (<TypeReferenceNode>node).typeName;
 
-        return undefined;
-    }
+            case SyntaxKind.ExpressionWithTypeArguments:
+                return isEntityNameExpression((<ExpressionWithTypeArguments>node).expression)
+                    ? <EntityNameExpression>(<ExpressionWithTypeArguments>node).expression
+                    : undefined;
 
-    export function isCallLikeExpression(node: Node): node is CallLikeExpression {
-        switch (node.kind) {
-            case SyntaxKind.CallExpression:
-            case SyntaxKind.NewExpression:
-            case SyntaxKind.TaggedTemplateExpression:
-            case SyntaxKind.Decorator:
-                return true;
-            default:
-                return false;
+            case SyntaxKind.Identifier:
+            case SyntaxKind.QualifiedName:
+                return (<EntityName><Node>node);
         }
+
+        return undefined;
     }
 
     export function getInvokedExpression(node: CallLikeExpression): Expression {
         if (node.kind === SyntaxKind.TaggedTemplateExpression) {
             return (<TaggedTemplateExpression>node).tag;
         }
+        else if (isJsxOpeningLikeElement(node)) {
+            return node.tagName;
+        }
 
         // Will either be a CallExpression, NewExpression, or Decorator.
         return (<CallExpression | Decorator>node).expression;
@@ -1112,8 +1116,8 @@ namespace ts {
                 // if the parameter's parent has a body and its grandparent is a class declaration, this is a valid target;
                 return (<FunctionLikeDeclaration>node.parent).body !== undefined
                     && (node.parent.kind === SyntaxKind.Constructor
-                    || node.parent.kind === SyntaxKind.MethodDeclaration
-                    || node.parent.kind === SyntaxKind.SetAccessor)
+                        || node.parent.kind === SyntaxKind.MethodDeclaration
+                        || node.parent.kind === SyntaxKind.SetAccessor)
                     && node.parent.parent.kind === SyntaxKind.ClassDeclaration;
         }
 
@@ -1178,7 +1182,7 @@ namespace ts {
             case SyntaxKind.PostfixUnaryExpression:
             case SyntaxKind.BinaryExpression:
             case SyntaxKind.ConditionalExpression:
-            case SyntaxKind.SpreadElementExpression:
+            case SyntaxKind.SpreadElement:
             case SyntaxKind.TemplateExpression:
             case SyntaxKind.NoSubstitutionTemplateLiteral:
             case SyntaxKind.OmittedExpression:
@@ -1186,6 +1190,7 @@ namespace ts {
             case SyntaxKind.JsxSelfClosingElement:
             case SyntaxKind.YieldExpression:
             case SyntaxKind.AwaitExpression:
+            case SyntaxKind.MetaProperty:
                 return true;
             case SyntaxKind.QualifiedName:
                 while (node.parent.kind === SyntaxKind.QualifiedName) {
@@ -1196,11 +1201,11 @@ namespace ts {
                 if (node.parent.kind === SyntaxKind.TypeQuery || isJSXTagName(node)) {
                     return true;
                 }
-            // fall through
+                // falls through
             case SyntaxKind.NumericLiteral:
             case SyntaxKind.StringLiteral:
             case SyntaxKind.ThisKeyword:
-                let parent = node.parent;
+                const parent = node.parent;
                 switch (parent.kind) {
                     case SyntaxKind.VariableDeclaration:
                     case SyntaxKind.Parameter:
@@ -1222,13 +1227,13 @@ namespace ts {
                     case SyntaxKind.SwitchStatement:
                         return (<ExpressionStatement>parent).expression === node;
                     case SyntaxKind.ForStatement:
-                        let forStatement = <ForStatement>parent;
+                        const forStatement = <ForStatement>parent;
                         return (forStatement.initializer === node && forStatement.initializer.kind !== SyntaxKind.VariableDeclarationList) ||
                             forStatement.condition === node ||
                             forStatement.incrementor === node;
                     case SyntaxKind.ForInStatement:
                     case SyntaxKind.ForOfStatement:
-                        let forInStatement = <ForInStatement | ForOfStatement>parent;
+                        const forInStatement = <ForInStatement | ForOfStatement>parent;
                         return (forInStatement.initializer === node && forInStatement.initializer.kind !== SyntaxKind.VariableDeclarationList) ||
                             forInStatement.expression === node;
                     case SyntaxKind.TypeAssertionExpression:
@@ -1241,6 +1246,7 @@ namespace ts {
                     case SyntaxKind.Decorator:
                     case SyntaxKind.JsxExpression:
                     case SyntaxKind.JsxSpreadAttribute:
+                    case SyntaxKind.SpreadAssignment:
                         return true;
                     case SyntaxKind.ExpressionWithTypeArguments:
                         return (<ExpressionWithTypeArguments>parent).expression === node && isExpressionWithTypeArgumentsInClassExtendsClause(parent);
@@ -1253,12 +1259,6 @@ namespace ts {
         return false;
     }
 
-    export function isInstantiatedModule(node: ModuleDeclaration, preserveConstEnums: boolean) {
-        const moduleState = getModuleInstanceState(node);
-        return moduleState === ModuleInstanceState.Instantiated ||
-            (preserveConstEnums && moduleState === ModuleInstanceState.ConstEnumOnly);
-    }
-
     export function isExternalModuleImportEqualsDeclaration(node: Node) {
         return node.kind === SyntaxKind.ImportEqualsDeclaration && (<ImportEqualsDeclaration>node).moduleReference.kind === SyntaxKind.ExternalModuleReference;
     }
@@ -1282,17 +1282,24 @@ namespace ts {
 
     /**
      * Returns true if the node is a CallExpression to the identifier 'require' with
-     * exactly one argument.
+     * exactly one argument (of the form 'require("name")').
      * This function does not test if the node is in a JavaScript file or not.
-    */
-    export function isRequireCall(expression: Node, checkArgumentIsStringLiteral: boolean): expression is CallExpression {
-        // of the form 'require("name")'
-        const isRequire = expression.kind === SyntaxKind.CallExpression &&
-            (<CallExpression>expression).expression.kind === SyntaxKind.Identifier &&
-            (<Identifier>(<CallExpression>expression).expression).text === "require" &&
-            (<CallExpression>expression).arguments.length === 1;
+     */
+    export function isRequireCall(callExpression: Node, checkArgumentIsStringLiteral: boolean): callExpression is CallExpression {
+        if (callExpression.kind !== SyntaxKind.CallExpression) {
+            return false;
+        }
+        const { expression, arguments: args } = callExpression as CallExpression;
 
-        return isRequire && (!checkArgumentIsStringLiteral || (<CallExpression>expression).arguments[0].kind === SyntaxKind.StringLiteral);
+        if (expression.kind !== SyntaxKind.Identifier || (expression as Identifier).text !== "require") {
+            return false;
+        }
+
+        if (args.length !== 1) {
+            return false;
+        }
+        const arg = args[0];
+        return !checkArgumentIsStringLiteral || arg.kind === SyntaxKind.StringLiteral || arg.kind === SyntaxKind.NoSubstitutionTemplateLiteral;
     }
 
     export function isSingleOrDoubleQuote(charCode: number) {
@@ -1303,23 +1310,35 @@ namespace ts {
      * Returns true if the node is a variable declaration whose initializer is a function expression.
      * This function does not test if the node is in a JavaScript file or not.
      */
-    export function isDeclarationOfFunctionExpression(s: Symbol) {
+    export function isDeclarationOfFunctionOrClassExpression(s: Symbol) {
         if (s.valueDeclaration && s.valueDeclaration.kind === SyntaxKind.VariableDeclaration) {
             const declaration = s.valueDeclaration as VariableDeclaration;
-            return declaration.initializer && declaration.initializer.kind === SyntaxKind.FunctionExpression;
+            return declaration.initializer && (declaration.initializer.kind === SyntaxKind.FunctionExpression || declaration.initializer.kind === SyntaxKind.ClassExpression);
         }
         return false;
     }
 
+    export function getRightMostAssignedExpression(node: Node) {
+        while (isAssignmentExpression(node, /*excludeCompoundAssignements*/ true)) {
+            node = node.right;
+        }
+        return node;
+    }
+
+    export function isExportsIdentifier(node: Node) {
+        return isIdentifier(node) && node.text === "exports";
+    }
+
+    export function isModuleExportsPropertyAccessExpression(node: Node) {
+        return isPropertyAccessExpression(node) && isIdentifier(node.expression) && node.expression.text === "module" && node.name.text === "exports";
+    }
+
     /// Given a BinaryExpression, returns SpecialPropertyAssignmentKind for the various kinds of property
     /// assignments we treat as special in the binder
-    export function getSpecialPropertyAssignmentKind(expression: Node): SpecialPropertyAssignmentKind {
+    export function getSpecialPropertyAssignmentKind(expression: ts.BinaryExpression): SpecialPropertyAssignmentKind {
         if (!isInJavaScriptFile(expression)) {
             return SpecialPropertyAssignmentKind.None;
         }
-        if (expression.kind !== SyntaxKind.BinaryExpression) {
-            return SpecialPropertyAssignmentKind.None;
-        }
         const expr = <BinaryExpression>expression;
         if (expr.operatorToken.kind !== SyntaxKind.EqualsToken || expr.left.kind !== SyntaxKind.PropertyAccessExpression) {
             return SpecialPropertyAssignmentKind.None;
@@ -1335,6 +1354,10 @@ namespace ts {
                 // module.exports = expr
                 return SpecialPropertyAssignmentKind.ModuleExports;
             }
+            else {
+                // F.x = expr
+                return SpecialPropertyAssignmentKind.Property;
+            }
         }
         else if (lhs.expression.kind === SyntaxKind.ThisKeyword) {
             return SpecialPropertyAssignmentKind.ThisProperty;
@@ -1354,6 +1377,7 @@ namespace ts {
             }
         }
 
+
         return SpecialPropertyAssignmentKind.None;
     }
 
@@ -1375,7 +1399,7 @@ namespace ts {
         }
     }
 
-    export function getNamespaceDeclarationNode(node: ImportDeclaration | ImportEqualsDeclaration | ExportDeclaration) {
+    export function getNamespaceDeclarationNode(node: ImportDeclaration | ImportEqualsDeclaration | ExportDeclaration): ImportEqualsDeclaration | NamespaceImport {
         if (node.kind === SyntaxKind.ImportEqualsDeclaration) {
             return <ImportEqualsDeclaration>node;
         }
@@ -1415,57 +1439,40 @@ namespace ts {
             (<JSDocFunctionType>node).parameters[0].type.kind === SyntaxKind.JSDocConstructorType;
     }
 
-    function getJSDocTag(node: Node, kind: SyntaxKind, checkParentVariableStatement: boolean): JSDocTag {
-        if (!node) {
-            return undefined;
-        }
-
-        const jsDocTags = getJSDocTags(node, checkParentVariableStatement);
-        if (!jsDocTags) {
-            return undefined;
-        }
-
-        for (const tag of jsDocTags) {
-            if (tag.kind === kind) {
-                return tag;
-            }
-        }
+    export function getCommentsFromJSDoc(node: Node): string[] {
+        return map(getJSDocs(node), doc => doc.comment);
     }
 
-    function append<T>(previous: T[] | undefined, additional: T[] | undefined): T[] | undefined {
-        if (additional) {
-            if (!previous) {
-                previous = [];
-            }
-            for (const x of additional) {
-                previous.push(x);
-            }
-        }
-        return previous;
+    export function hasJSDocParameterTags(node: FunctionLikeDeclaration | SignatureDeclaration) {
+        const parameterTags = getJSDocTags(node, SyntaxKind.JSDocParameterTag);
+        return parameterTags && parameterTags.length > 0;
     }
 
-    export function getJSDocComments(node: Node, checkParentVariableStatement: boolean): string[] {
-        return getJSDocs(node, checkParentVariableStatement, docs => map(docs, doc => doc.comment), tags => map(tags, tag => tag.comment));
+    function getJSDocTags(node: Node, kind: SyntaxKind): JSDocTag[] {
+        return flatMap(getJSDocs(node), doc =>
+            doc.kind === SyntaxKind.JSDocComment
+                ? filter((doc as JSDoc).tags, tag => tag.kind === kind)
+                : doc.kind === kind && doc);
     }
 
-    function getJSDocTags(node: Node, checkParentVariableStatement: boolean): JSDocTag[] {
-        return getJSDocs(node, checkParentVariableStatement, docs => {
-            const result: JSDocTag[] = [];
-            for (const doc of docs) {
-                if (doc.tags) {
-                    result.push(...doc.tags);
-                }
-            }
-            return result;
-        }, tags => tags);
+    function getFirstJSDocTag(node: Node, kind: SyntaxKind): JSDocTag {
+        return node && firstOrUndefined(getJSDocTags(node, kind));
     }
 
-   function getJSDocs<T>(node: Node, checkParentVariableStatement: boolean, getDocs: (docs: JSDoc[]) => T[], getTags: (tags: JSDocTag[]) => T[]): T[] {
-        // TODO: Get rid of getJsDocComments and friends (note the lowercase 's' in Js)
-        // TODO: A lot of this work should be cached, maybe. I guess it's only used in services right now...
-        let result: T[] = undefined;
-        // prepend documentation from parent sources
-        if (checkParentVariableStatement) {
+    export function getJSDocs(node: Node): (JSDoc | JSDocTag)[] {
+        if (isJSDocTypedefTag(node)) {
+            return [node.parent];
+        }
+
+        let cache: (JSDoc | JSDocTag)[] = node.jsDocCache;
+        if (!cache) {
+            getJSDocsWorker(node);
+            node.jsDocCache = cache;
+        }
+        return cache;
+
+        function getJSDocsWorker(node: Node) {
+            const parent = node.parent;
             // Try to recognize this pattern when node is initializer of variable declaration and JSDoc comments are on containing variable statement.
             // /**
             //   * @param {number} name
@@ -1473,68 +1480,52 @@ namespace ts {
             //   */
             // var x = function(name) { return name.length; }
             const isInitializerOfVariableDeclarationInStatement =
-                isVariableLike(node.parent) &&
-                (node.parent).initializer === node &&
-                node.parent.parent.parent.kind === SyntaxKind.VariableStatement;
+                isVariableLike(parent) &&
+                parent.initializer === node &&
+                parent.parent.parent.kind === SyntaxKind.VariableStatement;
             const isVariableOfVariableDeclarationStatement = isVariableLike(node) &&
-                node.parent.parent.kind === SyntaxKind.VariableStatement;
-
+                parent.parent.kind === SyntaxKind.VariableStatement;
             const variableStatementNode =
-                isInitializerOfVariableDeclarationInStatement ? node.parent.parent.parent :
-                isVariableOfVariableDeclarationStatement ? node.parent.parent :
+                isInitializerOfVariableDeclarationInStatement ? parent.parent.parent :
+                isVariableOfVariableDeclarationStatement ? parent.parent :
                 undefined;
             if (variableStatementNode) {
-                result = append(result, getJSDocs(variableStatementNode, checkParentVariableStatement, getDocs, getTags));
-            }
-            if (node.kind === SyntaxKind.ModuleDeclaration &&
-                node.parent && node.parent.kind === SyntaxKind.ModuleDeclaration) {
-                result = append(result, getJSDocs(node.parent, checkParentVariableStatement, getDocs, getTags));
+                getJSDocsWorker(variableStatementNode);
             }
 
             // Also recognize when the node is the RHS of an assignment expression
-            const parent = node.parent;
             const isSourceOfAssignmentExpressionStatement =
                 parent && parent.parent &&
                 parent.kind === SyntaxKind.BinaryExpression &&
                 (parent as BinaryExpression).operatorToken.kind === SyntaxKind.EqualsToken &&
                 parent.parent.kind === SyntaxKind.ExpressionStatement;
             if (isSourceOfAssignmentExpressionStatement) {
-                result = append(result, getJSDocs(parent.parent, checkParentVariableStatement, getDocs, getTags));
+                getJSDocsWorker(parent.parent);
             }
 
+            const isModuleDeclaration = node.kind === SyntaxKind.ModuleDeclaration &&
+                parent && parent.kind === SyntaxKind.ModuleDeclaration;
             const isPropertyAssignmentExpression = parent && parent.kind === SyntaxKind.PropertyAssignment;
-            if (isPropertyAssignmentExpression) {
-                result = append(result, getJSDocs(parent, checkParentVariableStatement, getDocs, getTags));
+            if (isModuleDeclaration || isPropertyAssignmentExpression) {
+                getJSDocsWorker(parent);
             }
 
             // Pull parameter comments from declaring function as well
             if (node.kind === SyntaxKind.Parameter) {
-                const paramTags = getJSDocParameterTag(node as ParameterDeclaration, checkParentVariableStatement);
-                if (paramTags) {
-                    result = append(result, getTags(paramTags));
-                }
+                cache = concatenate(cache, getJSDocParameterTags(node as ParameterDeclaration));
             }
-        }
-
-        if (isVariableLike(node) && node.initializer) {
-            result = append(result, getJSDocs(node.initializer, /*checkParentVariableStatement*/ false, getDocs, getTags));
-        }
 
-        if (node.jsDocComments) {
-            if (result) {
-                result = append(result, getDocs(node.jsDocComments));
+            if (isVariableLike(node) && node.initializer) {
+                cache = concatenate(cache, node.initializer.jsDoc);
             }
-            else {
-                return getDocs(node.jsDocComments);
-            }
-        }
 
-        return result;
+            cache = concatenate(cache, node.jsDoc);
+        }
     }
 
-    function getJSDocParameterTag(param: ParameterDeclaration, checkParentVariableStatement: boolean): JSDocTag[] {
-        const func = param.parent as FunctionLikeDeclaration;
-        const tags = getJSDocTags(func, checkParentVariableStatement);
+    export function getJSDocParameterTags(param: ParameterDeclaration): JSDocParameterTag[] {
+        const func = param.parent;
+        const tags = getJSDocTags(func, SyntaxKind.JSDocParameterTag) as JSDocParameterTag[];
         if (!param.name) {
             // this is an anonymous jsdoc param from a `function(type1, type2): type3` specification
             const i = func.parameters.indexOf(param);
@@ -1545,10 +1536,7 @@ namespace ts {
         }
         else if (param.name.kind === SyntaxKind.Identifier) {
             const name = (param.name as Identifier).text;
-            const paramTags = filter(tags, tag => tag.kind === SyntaxKind.JSDocParameterTag && (tag as JSDocParameterTag).parameterName.text === name);
-            if (paramTags) {
-                return paramTags;
-            }
+            return filter(tags, tag => tag.kind === SyntaxKind.JSDocParameterTag && tag.name.text === name);
         }
         else {
             // TODO: it's a destructured parameter, so it should look up an "object type" series of multiple lines
@@ -1557,39 +1545,55 @@ namespace ts {
         }
     }
 
-    export function getJSDocTypeTag(node: Node): JSDocTypeTag {
-        return <JSDocTypeTag>getJSDocTag(node, SyntaxKind.JSDocTypeTag, /*checkParentVariableStatement*/ false);
+    /** Does the opposite of `getJSDocParameterTags`: given a JSDoc parameter, finds the parameter corresponding to it. */
+    export function getParameterFromJSDoc(node: JSDocParameterTag): ParameterDeclaration | undefined {
+        const name = node.name.text;
+        const grandParent = node.parent!.parent!;
+        Debug.assert(node.parent!.kind === SyntaxKind.JSDocComment);
+        if (!isFunctionLike(grandParent)) {
+            return undefined;
+        }
+        return find(grandParent.parameters, p =>
+            p.name.kind === SyntaxKind.Identifier && p.name.text === name);
     }
 
-    export function getJSDocReturnTag(node: Node): JSDocReturnTag {
-        return <JSDocReturnTag>getJSDocTag(node, SyntaxKind.JSDocReturnTag, /*checkParentVariableStatement*/ true);
+    export function getTypeParameterFromJsDoc(node: TypeParameterDeclaration & { parent: JSDocTemplateTag }): TypeParameterDeclaration | undefined {
+        const name = node.name.text;
+        const { typeParameters } = (node.parent.parent.parent as ts.SignatureDeclaration | ts.InterfaceDeclaration | ts.ClassDeclaration);
+        return find(typeParameters, p => p.name.text === name);
     }
 
-    export function getJSDocTemplateTag(node: Node): JSDocTemplateTag {
-        return <JSDocTemplateTag>getJSDocTag(node, SyntaxKind.JSDocTemplateTag, /*checkParentVariableStatement*/ false);
-    }
-
-    export function getCorrespondingJSDocParameterTag(parameter: ParameterDeclaration): JSDocParameterTag {
-        if (parameter.name && parameter.name.kind === SyntaxKind.Identifier) {
-            // If it's a parameter, see if the parent has a jsdoc comment with an @param
-            // annotation.
-            const parameterName = (<Identifier>parameter.name).text;
-
-            const jsDocTags = getJSDocTags(parameter.parent, /*checkParentVariableStatement*/ true);
-            if (!jsDocTags) {
-                return undefined;
-            }
-            for (const tag of jsDocTags) {
-                if (tag.kind === SyntaxKind.JSDocParameterTag) {
-                    const parameterTag = <JSDocParameterTag>tag;
-                    if (parameterTag.parameterName.text === parameterName) {
-                        return parameterTag;
-                    }
-                }
+    export function getJSDocType(node: Node): JSDocType {
+        let tag: JSDocTypeTag | JSDocParameterTag = getFirstJSDocTag(node, SyntaxKind.JSDocTypeTag) as JSDocTypeTag;
+        if (!tag && node.kind === SyntaxKind.Parameter) {
+            const paramTags = getJSDocParameterTags(node as ParameterDeclaration);
+            if (paramTags) {
+                tag = find(paramTags, tag => !!tag.typeExpression);
             }
         }
 
-        return undefined;
+        return tag && tag.typeExpression && tag.typeExpression.type;
+    }
+
+    export function getJSDocAugmentsTag(node: Node): JSDocAugmentsTag {
+        return getFirstJSDocTag(node, SyntaxKind.JSDocAugmentsTag) as JSDocAugmentsTag;
+    }
+
+    export function getJSDocClassTag(node: Node): JSDocClassTag {
+        return getFirstJSDocTag(node, SyntaxKind.JSDocClassTag) as JSDocClassTag;
+    }
+
+    export function getJSDocReturnTag(node: Node): JSDocReturnTag {
+        return getFirstJSDocTag(node, SyntaxKind.JSDocReturnTag) as JSDocReturnTag;
+    }
+
+    export function getJSDocReturnType(node: Node): JSDocType {
+        const returnTag = getJSDocReturnTag(node);
+        return returnTag && returnTag.typeExpression && returnTag.typeExpression.type;
+    }
+
+    export function getJSDocTemplateTag(node: Node): JSDocTemplateTag {
+        return getFirstJSDocTag(node, SyntaxKind.JSDocTemplateTag) as JSDocTemplateTag;
     }
 
     export function hasRestParameter(s: SignatureDeclaration): boolean {
@@ -1602,14 +1606,11 @@ namespace ts {
 
     export function isRestParameter(node: ParameterDeclaration) {
         if (node && (node.flags & NodeFlags.JavaScriptFile)) {
-            if (node.type && node.type.kind === SyntaxKind.JSDocVariadicType) {
+            if (node.type && node.type.kind === SyntaxKind.JSDocVariadicType ||
+                forEach(getJSDocParameterTags(node),
+                        t => t.typeExpression && t.typeExpression.type.kind === SyntaxKind.JSDocVariadicType)) {
                 return true;
             }
-
-            const paramTag = getCorrespondingJSDocParameterTag(node);
-            if (paramTag && paramTag.typeExpression) {
-                return paramTag.typeExpression.type.kind === SyntaxKind.JSDocVariadicType;
-            }
         }
         return isDeclaredRestParam(node);
     }
@@ -1618,29 +1619,68 @@ namespace ts {
         return node && node.dotDotDotToken !== undefined;
     }
 
+    export const enum AssignmentKind {
+        None, Definite, Compound
+    }
+
+    export function getAssignmentTargetKind(node: Node): AssignmentKind {
+        let parent = node.parent;
+        while (true) {
+            switch (parent.kind) {
+                case SyntaxKind.BinaryExpression:
+                    const binaryOperator = (<BinaryExpression>parent).operatorToken.kind;
+                    return isAssignmentOperator(binaryOperator) && (<BinaryExpression>parent).left === node ?
+                        binaryOperator === SyntaxKind.EqualsToken ? AssignmentKind.Definite : AssignmentKind.Compound :
+                        AssignmentKind.None;
+                case SyntaxKind.PrefixUnaryExpression:
+                case SyntaxKind.PostfixUnaryExpression:
+                    const unaryOperator = (<PrefixUnaryExpression | PostfixUnaryExpression>parent).operator;
+                    return unaryOperator === SyntaxKind.PlusPlusToken || unaryOperator === SyntaxKind.MinusMinusToken ? AssignmentKind.Compound : AssignmentKind.None;
+                case SyntaxKind.ForInStatement:
+                case SyntaxKind.ForOfStatement:
+                    return (<ForInOrOfStatement>parent).initializer === node ? AssignmentKind.Definite : AssignmentKind.None;
+                case SyntaxKind.ParenthesizedExpression:
+                case SyntaxKind.ArrayLiteralExpression:
+                case SyntaxKind.SpreadElement:
+                    node = parent;
+                    break;
+                case SyntaxKind.ShorthandPropertyAssignment:
+                    if ((parent as ShorthandPropertyAssignment).name !== node) {
+                        return AssignmentKind.None;
+                    }
+                    node = parent.parent;
+                    break;
+                case SyntaxKind.PropertyAssignment:
+                    if ((parent as ShorthandPropertyAssignment).name === node) {
+                        return AssignmentKind.None;
+                    }
+                    node = parent.parent;
+                    break;
+                default:
+                    return AssignmentKind.None;
+            }
+            parent = node.parent;
+        }
+    }
+
     // A node is an assignment target if it is on the left hand side of an '=' token, if it is parented by a property
     // assignment in an object literal that is an assignment target, or if it is parented by an array literal that is
-    // an assignment target. Examples include 'a = xxx', '{ p: a } = xxx', '[{ p: a}] = xxx'.
+    // an assignment target. Examples include 'a = xxx', '{ p: a } = xxx', '[{ a }] = xxx'.
+    // (Note that `p` is not a target in the above examples, only `a`.)
     export function isAssignmentTarget(node: Node): boolean {
-        while (node.parent.kind === SyntaxKind.ParenthesizedExpression) {
-            node = node.parent;
+        return getAssignmentTargetKind(node) !== AssignmentKind.None;
+    }
+
+    // a node is delete target iff. it is PropertyAccessExpression/ElementAccessExpression with parentheses skipped
+    export function isDeleteTarget(node: Node): boolean {
+        if (node.kind !== SyntaxKind.PropertyAccessExpression && node.kind !== SyntaxKind.ElementAccessExpression) {
+            return false;
         }
-        while (true) {
-            const parent = node.parent;
-            if (parent.kind === SyntaxKind.ArrayLiteralExpression || parent.kind === SyntaxKind.SpreadElementExpression) {
-                node = parent;
-                continue;
-            }
-            if (parent.kind === SyntaxKind.PropertyAssignment || parent.kind === SyntaxKind.ShorthandPropertyAssignment) {
-                node = parent.parent;
-                continue;
-            }
-            return parent.kind === SyntaxKind.BinaryExpression &&
-                isAssignmentOperator((<BinaryExpression>parent).operatorToken.kind) &&
-                (<BinaryExpression>parent).left === node ||
-                (parent.kind === SyntaxKind.ForInStatement || parent.kind === SyntaxKind.ForOfStatement) &&
-                (<ForInStatement | ForOfStatement>parent).initializer === node;
+        node = node.parent;
+        while (node && node.kind === SyntaxKind.ParenthesizedExpression) {
+            node = node.parent;
         }
+        return node && node.kind === SyntaxKind.DeleteExpression;
     }
 
     export function isNodeDescendantOf(node: Node, ancestor: Node): boolean {
@@ -1663,22 +1703,31 @@ namespace ts {
 
     // True if the given identifier, string literal, or number literal is the name of a declaration node
     export function isDeclarationName(name: Node): boolean {
-        if (name.kind !== SyntaxKind.Identifier && name.kind !== SyntaxKind.StringLiteral && name.kind !== SyntaxKind.NumericLiteral) {
-            return false;
-        }
-
-        const parent = name.parent;
-        if (parent.kind === SyntaxKind.ImportSpecifier || parent.kind === SyntaxKind.ExportSpecifier) {
-            if ((<ImportOrExportSpecifier>parent).propertyName) {
-                return true;
-            }
+        switch (name.kind) {
+            case SyntaxKind.Identifier:
+            case SyntaxKind.StringLiteral:
+            case SyntaxKind.NumericLiteral:
+                return isDeclaration(name.parent) && name.parent.name === name;
+            default:
+                return false;
         }
+    }
 
-        if (isDeclaration(parent)) {
-            return (<Declaration>parent).name === name;
+    /* @internal */
+    // See GH#16030
+    export function isAnyDeclarationName(name: Node): boolean {
+        switch (name.kind) {
+            case SyntaxKind.Identifier:
+            case SyntaxKind.StringLiteral:
+            case SyntaxKind.NumericLiteral:
+                if (isDeclaration(name.parent)) {
+                    return name.parent.name === name;
+                }
+                const binExp = name.parent.parent;
+                return isBinaryExpression(binExp) && getSpecialPropertyAssignmentKind(binExp) !== SpecialPropertyAssignmentKind.None && getNameOfDeclaration(binExp) === name;
+            default:
+                return false;
         }
-
-        return false;
     }
 
     export function isLiteralComputedPropertyDeclarationName(node: Node) {
@@ -1701,7 +1750,7 @@ namespace ts {
             case SyntaxKind.PropertyAssignment:
             case SyntaxKind.PropertyAccessExpression:
                 // Name in member declaration or property name in property access
-                return (<Declaration | PropertyAccessExpression>parent).name === node;
+                return (<NamedDeclaration | PropertyAccessExpression>parent).name === node;
             case SyntaxKind.QualifiedName:
                 // Name on right hand side of dot in a type query
                 if ((<QualifiedName>parent).right === node) {
@@ -1778,7 +1827,7 @@ namespace ts {
         }
     }
 
-    export function getAncestor(node: Node, kind: SyntaxKind): Node {
+    export function getAncestor(node: Node | undefined, kind: SyntaxKind): Node | undefined {
         while (node) {
             if (node.kind === kind) {
                 return node;
@@ -1793,21 +1842,19 @@ namespace ts {
         const isNoDefaultLibRegEx = /^(\/\/\/\s*<reference\s+no-default-lib\s*=\s*)('|")(.+?)\2\s*\/>/gim;
         if (simpleReferenceRegEx.test(comment)) {
             if (isNoDefaultLibRegEx.test(comment)) {
-                return {
-                    isNoDefaultLib: true
-                };
+                return { isNoDefaultLib: true };
             }
             else {
                 const refMatchResult = fullTripleSlashReferencePathRegEx.exec(comment);
                 const refLibResult = !refMatchResult && fullTripleSlashReferenceTypeReferenceDirectiveRegEx.exec(comment);
-                if (refMatchResult || refLibResult) {
-                    const start = commentRange.pos;
-                    const end = commentRange.end;
+                const match = refMatchResult || refLibResult;
+                if (match) {
+                    const pos = commentRange.pos + match[1].length + match[2].length;
                     return {
                         fileReference: {
-                            pos: start,
-                            end: end,
-                            fileName: (refMatchResult || refLibResult)[3]
+                            pos,
+                            end: pos + match[3].length,
+                            fileName: match[3]
                         },
                         isNoDefaultLib: false,
                         isTypeReferenceDirective: !!refLibResult
@@ -1832,12 +1879,59 @@ namespace ts {
         return SyntaxKind.FirstTriviaToken <= token && token <= SyntaxKind.LastTriviaToken;
     }
 
-    export function isAsyncFunctionLike(node: Node): boolean {
-        return isFunctionLike(node) && hasModifier(node, ModifierFlags.Async) && !isAccessor(node);
+    export const enum FunctionFlags {
+        Normal = 0,             // Function is a normal function
+        Generator = 1 << 0,     // Function is a generator function or async generator function
+        Async = 1 << 1,         // Function is an async function or an async generator function
+        Invalid = 1 << 2,       // Function is a signature or overload and does not have a body.
+        AsyncGenerator = Async | Generator, // Function is an async generator function
+    }
+
+    export function getFunctionFlags(node: FunctionLikeDeclaration | undefined) {
+        if (!node) {
+            return FunctionFlags.Invalid;
+        }
+
+        let flags = FunctionFlags.Normal;
+        switch (node.kind) {
+            case SyntaxKind.FunctionDeclaration:
+            case SyntaxKind.FunctionExpression:
+            case SyntaxKind.MethodDeclaration:
+                if (node.asteriskToken) {
+                    flags |= FunctionFlags.Generator;
+                }
+                // falls through
+            case SyntaxKind.ArrowFunction:
+                if (hasModifier(node, ModifierFlags.Async)) {
+                    flags |= FunctionFlags.Async;
+                }
+                break;
+        }
+
+        if (!node.body) {
+            flags |= FunctionFlags.Invalid;
+        }
+
+        return flags;
+    }
+
+    export function isAsyncFunction(node: Node): boolean {
+        switch (node.kind) {
+            case SyntaxKind.FunctionDeclaration:
+            case SyntaxKind.FunctionExpression:
+            case SyntaxKind.ArrowFunction:
+            case SyntaxKind.MethodDeclaration:
+                return (<FunctionLikeDeclaration>node).body !== undefined
+                    && (<FunctionLikeDeclaration>node).asteriskToken === undefined
+                    && hasModifier(node, ModifierFlags.Async);
+        }
+        return false;
     }
 
-    export function isStringOrNumericLiteral(kind: SyntaxKind): boolean {
-        return kind === SyntaxKind.StringLiteral || kind === SyntaxKind.NumericLiteral;
+    export function isStringOrNumericLiteral(node: Node): node is StringLiteral | NumericLiteral {
+        const kind = node.kind;
+        return kind === SyntaxKind.StringLiteral
+            || kind === SyntaxKind.NumericLiteral;
     }
 
     /**
@@ -1848,12 +1942,13 @@ namespace ts {
      *      Symbol.
      */
     export function hasDynamicName(declaration: Declaration): boolean {
-        return declaration.name && isDynamicName(declaration.name);
+        const name = getNameOfDeclaration(declaration);
+        return name && isDynamicName(name);
     }
 
     export function isDynamicName(name: DeclarationName): boolean {
         return name.kind === SyntaxKind.ComputedPropertyName &&
-            !isStringOrNumericLiteral((<ComputedPropertyName>name).expression.kind) &&
+            !isStringOrNumericLiteral((<ComputedPropertyName>name).expression) &&
             !isWellKnownSymbolSyntactically((<ComputedPropertyName>name).expression);
     }
 
@@ -1866,7 +1961,7 @@ namespace ts {
         return isPropertyAccessExpression(node) && isESSymbolIdentifier(node.expression);
     }
 
-    export function getPropertyNameForPropertyNameNode(name: DeclarationName): string {
+    export function getPropertyNameForPropertyNameNode(name: DeclarationName | ParameterDeclaration): string {
         if (name.kind === SyntaxKind.Identifier || name.kind === SyntaxKind.StringLiteral || name.kind === SyntaxKind.NumericLiteral || name.kind === SyntaxKind.Parameter) {
             return (<Identifier | LiteralExpression>name).text;
         }
@@ -1895,22 +1990,8 @@ namespace ts {
         return node.kind === SyntaxKind.Identifier && (<Identifier>node).text === "Symbol";
     }
 
-    export function isModifierKind(token: SyntaxKind): boolean {
-        switch (token) {
-            case SyntaxKind.AbstractKeyword:
-            case SyntaxKind.AsyncKeyword:
-            case SyntaxKind.ConstKeyword:
-            case SyntaxKind.DeclareKeyword:
-            case SyntaxKind.DefaultKeyword:
-            case SyntaxKind.ExportKeyword:
-            case SyntaxKind.PublicKeyword:
-            case SyntaxKind.PrivateKeyword:
-            case SyntaxKind.ProtectedKeyword:
-            case SyntaxKind.ReadonlyKeyword:
-            case SyntaxKind.StaticKeyword:
-                return true;
-        }
-        return false;
+    export function isPushOrUnshiftIdentifier(node: Identifier) {
+        return node.text === "push" || node.text === "unshift";
     }
 
     export function isParameterDeclaration(node: VariableLikeDeclaration) {
@@ -1943,70 +2024,12 @@ namespace ts {
             || positionIsSynthesized(node.end);
     }
 
-    export function getOriginalNode(node: Node): Node {
-        if (node) {
-            while (node.original !== undefined) {
-                node = node.original;
-            }
-        }
-
-        return node;
-    }
-
-    /**
-     * Gets a value indicating whether a node originated in the parse tree.
-     *
-     * @param node The node to test.
-     */
-    export function isParseTreeNode(node: Node): boolean {
-        return (node.flags & NodeFlags.Synthesized) === 0;
-    }
-
-    /**
-     * Gets the original parse tree node for a node.
-     *
-     * @param node The original node.
-     * @returns The original parse tree node if found; otherwise, undefined.
-     */
-    export function getParseTreeNode(node: Node): Node;
-
-    /**
-     * Gets the original parse tree node for a node.
-     *
-     * @param node The original node.
-     * @param nodeTest A callback used to ensure the correct type of parse tree node is returned.
-     * @returns The original parse tree node if found; otherwise, undefined.
-     */
-    export function getParseTreeNode<T extends Node>(node: Node, nodeTest?: (node: Node) => node is T): T;
-    export function getParseTreeNode(node: Node, nodeTest?: (node: Node) => boolean): Node {
-        if (isParseTreeNode(node)) {
-            return node;
-        }
-
-        node = getOriginalNode(node);
-
-        if (isParseTreeNode(node) && (!nodeTest || nodeTest(node))) {
-            return node;
-        }
-
-        return undefined;
+    export function getOriginalSourceFile(sourceFile: SourceFile) {
+        return getParseTreeNode(sourceFile, isSourceFile) || sourceFile;
     }
 
     export function getOriginalSourceFiles(sourceFiles: SourceFile[]) {
-        const originalSourceFiles: SourceFile[] = [];
-        for (const sourceFile of sourceFiles) {
-            const originalSourceFile = getParseTreeNode(sourceFile, isSourceFile);
-            if (originalSourceFile) {
-                originalSourceFiles.push(originalSourceFile);
-            }
-        }
-
-        return originalSourceFiles;
-    }
-
-    export function getOriginalNodeId(node: Node) {
-        node = getOriginalNode(node);
-        return node ? getNodeId(node) : 0;
+        return sameMap(sourceFiles, getOriginalSourceFile);
     }
 
     export const enum Associativity {
@@ -2197,9 +2220,12 @@ namespace ts {
             case SyntaxKind.YieldExpression:
                 return 2;
 
-            case SyntaxKind.SpreadElementExpression:
+            case SyntaxKind.SpreadElement:
                 return 1;
 
+            case SyntaxKind.CommaListExpression:
+                return 0;
+
             default:
                 return -1;
         }
@@ -2225,22 +2251,16 @@ namespace ts {
         }
 
         function reattachFileDiagnostics(newFile: SourceFile): void {
-            if (!hasProperty(fileDiagnostics, newFile.fileName)) {
-                return;
-            }
-
-            for (const diagnostic of fileDiagnostics[newFile.fileName]) {
-                diagnostic.file = newFile;
-            }
+            forEach(fileDiagnostics.get(newFile.fileName), diagnostic => diagnostic.file = newFile);
         }
 
         function add(diagnostic: Diagnostic): void {
             let diagnostics: Diagnostic[];
             if (diagnostic.file) {
-                diagnostics = fileDiagnostics[diagnostic.file.fileName];
+                diagnostics = fileDiagnostics.get(diagnostic.file.fileName);
                 if (!diagnostics) {
                     diagnostics = [];
-                    fileDiagnostics[diagnostic.file.fileName] = diagnostics;
+                    fileDiagnostics.set(diagnostic.file.fileName, diagnostics);
                 }
             }
             else {
@@ -2260,7 +2280,7 @@ namespace ts {
         function getDiagnostics(fileName?: string): Diagnostic[] {
             sortAndDeduplicate();
             if (fileName) {
-                return fileDiagnostics[fileName] || [];
+                return fileDiagnostics.get(fileName) || [];
             }
 
             const allDiagnostics: Diagnostic[] = [];
@@ -2270,9 +2290,9 @@ namespace ts {
 
             forEach(nonFileDiagnostics, pushDiagnostic);
 
-            for (const key in fileDiagnostics) {
-                forEach(fileDiagnostics[key], pushDiagnostic);
-            }
+            fileDiagnostics.forEach(diagnostics => {
+                forEach(diagnostics, pushDiagnostic);
+            });
 
             return sortAndDeduplicateDiagnostics(allDiagnostics);
         }
@@ -2285,9 +2305,9 @@ namespace ts {
             diagnosticsModified = false;
             nonFileDiagnostics = sortAndDeduplicateDiagnostics(nonFileDiagnostics);
 
-            for (const key in fileDiagnostics) {
-                fileDiagnostics[key] = sortAndDeduplicateDiagnostics(fileDiagnostics[key]);
-            }
+            fileDiagnostics.forEach((diagnostics, key) => {
+                fileDiagnostics.set(key, sortAndDeduplicateDiagnostics(diagnostics));
+            });
         }
     }
 
@@ -2297,7 +2317,7 @@ namespace ts {
     // the map below must be updated. Note that this regexp *does not* include the 'delete' character.
     // There is no reason for this other than that JSON.stringify does not handle it either.
     const escapedCharsRegExp = /[\\\"\u0000-\u001f\t\v\f\b\r\n\u2028\u2029\u0085]/g;
-    const escapedCharsMap = createMap({
+    const escapedCharsMap = createMapFromTemplate({
         "\0": "\\0",
         "\t": "\\t",
         "\v": "\\v",
@@ -2319,13 +2339,11 @@ namespace ts {
      * Note that this doesn't actually wrap the input in double quotes.
      */
     export function escapeString(s: string): string {
-        s = escapedCharsRegExp.test(s) ? s.replace(escapedCharsRegExp, getReplacement) : s;
-
-        return s;
+        return s.replace(escapedCharsRegExp, getReplacement);
+    }
 
-        function getReplacement(c: string) {
-            return escapedCharsMap[c] || get16BitUnicodeEscapeSequence(c.charCodeAt(0));
-        }
+    function getReplacement(c: string) {
+        return escapedCharsMap.get(c) || get16BitUnicodeEscapeSequence(c.charCodeAt(0));
     }
 
     export function isIntrinsicJsxName(name: string) {
@@ -2340,7 +2358,8 @@ namespace ts {
     }
 
     const nonAsciiCharacters = /[^\u0000-\u007F]/g;
-    export function escapeNonAsciiCharacters(s: string): string {
+    export function escapeNonAsciiString(s: string): string {
+        s = escapeString(s);
         // Replace non-ASCII characters with '\uNNNN' escapes if any exist.
         // Otherwise just return the original string.
         return nonAsciiCharacters.test(s) ?
@@ -2348,23 +2367,6 @@ namespace ts {
             s;
     }
 
-    export interface EmitTextWriter {
-        write(s: string): void;
-        writeTextOfNode(text: string, node: Node): void;
-        writeLine(): void;
-        increaseIndent(): void;
-        decreaseIndent(): void;
-        getText(): string;
-        rawWrite(s: string): void;
-        writeLiteral(s: string): void;
-        getTextPos(): number;
-        getLine(): number;
-        getColumn(): number;
-        getIndent(): number;
-        isAtStartOfLine(): boolean;
-        reset(): void;
-    }
-
     const indentStrings: string[] = ["", "    "];
     export function getIndentString(level: number) {
         if (indentStrings[level] === undefined) {
@@ -2377,7 +2379,7 @@ namespace ts {
         return indentStrings[1].length;
     }
 
-    export function createTextWriter(newLine: String): EmitTextWriter {
+    export function createTextWriter(newLine: string): EmitTextWriter {
         let output: string;
         let indent: number;
         let lineStart: boolean;
@@ -2459,9 +2461,9 @@ namespace ts {
         return file.moduleName || getExternalModuleNameFromPath(host, file.fileName);
     }
 
-    export function getExternalModuleNameFromDeclaration(host: EmitHost, resolver: EmitResolver, declaration: ImportEqualsDeclaration | ImportDeclaration | ExportDeclaration): string {
+    export function getExternalModuleNameFromDeclaration(host: EmitHost, resolver: EmitResolver, declaration: ImportEqualsDeclaration | ImportDeclaration | ExportDeclaration | ModuleDeclaration): string {
         const file = resolver.getExternalModuleFileFromDeclaration(declaration);
-        if (!file || isDeclarationFile(file)) {
+        if (!file || file.isDeclarationFile) {
             return undefined;
         }
         return getResolvedExternalModuleName(host, file);
@@ -2498,7 +2500,7 @@ namespace ts {
         const path = outputDir
             ? getSourceFilePathInNewDir(sourceFile, host, outputDir)
             : sourceFile.fileName;
-        return removeFileExtension(path) + ".d.ts";
+        return removeFileExtension(path) + Extension.Dts;
     }
 
     export interface EmitFileNames {
@@ -2516,165 +2518,25 @@ namespace ts {
      * @param host An EmitHost.
      * @param targetSourceFile An optional target source file to emit.
      */
-    export function getSourceFilesToEmit(host: EmitHost, targetSourceFile?: SourceFile) {
+    export function getSourceFilesToEmit(host: EmitHost, targetSourceFile?: SourceFile): SourceFile[] {
         const options = host.getCompilerOptions();
+        const isSourceFileFromExternalLibrary = (file: SourceFile) => host.isSourceFileFromExternalLibrary(file);
         if (options.outFile || options.out) {
             const moduleKind = getEmitModuleKind(options);
             const moduleEmitEnabled = moduleKind === ModuleKind.AMD || moduleKind === ModuleKind.System;
-            const sourceFiles = host.getSourceFiles();
             // Can emit only sources that are not declaration file and are either non module code or module with --module or --target es6 specified
-            return filter(sourceFiles, moduleEmitEnabled ? isNonDeclarationFile : isBundleEmitNonExternalModule);
+            return filter(host.getSourceFiles(), sourceFile =>
+                (moduleEmitEnabled || !isExternalModule(sourceFile)) && sourceFileMayBeEmitted(sourceFile, options, isSourceFileFromExternalLibrary));
         }
         else {
             const sourceFiles = targetSourceFile === undefined ? host.getSourceFiles() : [targetSourceFile];
-            return filter(sourceFiles, isNonDeclarationFile);
-        }
-    }
-
-    function isNonDeclarationFile(sourceFile: SourceFile) {
-        return !isDeclarationFile(sourceFile);
-    }
-
-    function isBundleEmitNonExternalModule(sourceFile: SourceFile) {
-        return !isDeclarationFile(sourceFile) && !isExternalModule(sourceFile);
-    }
-
-    /**
-     * Iterates over each source file to emit. The source files are expected to have been
-     * transformed for use by the pretty printer.
-     *
-     * Originally part of `forEachExpectedEmitFile`, this functionality was extracted to support
-     * transformations.
-     *
-     * @param host An EmitHost.
-     * @param sourceFiles The transformed source files to emit.
-     * @param action The action to execute.
-     */
-    export function forEachTransformedEmitFile(host: EmitHost, sourceFiles: SourceFile[],
-        action: (jsFilePath: string, sourceMapFilePath: string, declarationFilePath: string, sourceFiles: SourceFile[], isBundledEmit: boolean) => void,
-        emitOnlyDtsFiles?: boolean) {
-        const options = host.getCompilerOptions();
-        // Emit on each source file
-        if (options.outFile || options.out) {
-            onBundledEmit(host, sourceFiles);
-        }
-        else {
-            for (const sourceFile of sourceFiles) {
-                 // Don't emit if source file is a declaration file, or was located under node_modules
-                if (!isDeclarationFile(sourceFile) && !host.isSourceFileFromExternalLibrary(sourceFile)) {
-                    onSingleFileEmit(host, sourceFile);
-                }
-            }
-        }
-
-        function onSingleFileEmit(host: EmitHost, sourceFile: SourceFile) {
-            // JavaScript files are always LanguageVariant.JSX, as JSX syntax is allowed in .js files also.
-            // So for JavaScript files, '.jsx' is only emitted if the input was '.jsx', and JsxEmit.Preserve.
-            // For TypeScript, the only time to emit with a '.jsx' extension, is on JSX input, and JsxEmit.Preserve
-            let extension = ".js";
-            if (options.jsx === JsxEmit.Preserve) {
-                if (isSourceFileJavaScript(sourceFile)) {
-                    if (fileExtensionIs(sourceFile.fileName, ".jsx")) {
-                        extension = ".jsx";
-                    }
-                }
-                else if (sourceFile.languageVariant === LanguageVariant.JSX) {
-                    // TypeScript source file preserving JSX syntax
-                    extension = ".jsx";
-                }
-            }
-            const jsFilePath = getOwnEmitOutputFilePath(sourceFile, host, extension);
-            const sourceMapFilePath = getSourceMapFilePath(jsFilePath, options);
-            const declarationFilePath = !isSourceFileJavaScript(sourceFile) && (options.declaration || emitOnlyDtsFiles) ? getDeclarationEmitOutputFilePath(sourceFile, host) : undefined;
-            action(jsFilePath, sourceMapFilePath, declarationFilePath, [sourceFile], /*isBundledEmit*/ false);
-        }
-
-        function onBundledEmit(host: EmitHost, sourceFiles: SourceFile[]) {
-            if (sourceFiles.length) {
-                const jsFilePath = options.outFile || options.out;
-                const sourceMapFilePath = getSourceMapFilePath(jsFilePath, options);
-                const declarationFilePath = options.declaration ? removeFileExtension(jsFilePath) + ".d.ts" : undefined;
-                action(jsFilePath, sourceMapFilePath, declarationFilePath, sourceFiles, /*isBundledEmit*/ true);
-            }
+            return filter(sourceFiles, sourceFile => sourceFileMayBeEmitted(sourceFile, options, isSourceFileFromExternalLibrary));
         }
     }
 
-    function getSourceMapFilePath(jsFilePath: string, options: CompilerOptions) {
-        return options.sourceMap ? jsFilePath + ".map" : undefined;
-    }
-
-    /**
-     * Iterates over the source files that are expected to have an emit output. This function
-     * is used by the legacy emitter and the declaration emitter and should not be used by
-     * the tree transforming emitter.
-     *
-     * @param host An EmitHost.
-     * @param action The action to execute.
-     * @param targetSourceFile An optional target source file to emit.
-     */
-    export function forEachExpectedEmitFile(host: EmitHost,
-        action: (emitFileNames: EmitFileNames, sourceFiles: SourceFile[], isBundledEmit: boolean, emitOnlyDtsFiles: boolean) => void,
-        targetSourceFile?: SourceFile,
-        emitOnlyDtsFiles?: boolean) {
-        const options = host.getCompilerOptions();
-        // Emit on each source file
-        if (options.outFile || options.out) {
-            onBundledEmit(host);
-        }
-        else {
-            const sourceFiles = targetSourceFile === undefined ? host.getSourceFiles() : [targetSourceFile];
-            for (const sourceFile of sourceFiles) {
-                // Don't emit if source file is a declaration file, or was located under node_modules
-                if (!isDeclarationFile(sourceFile) && !host.isSourceFileFromExternalLibrary(sourceFile)) {
-                    onSingleFileEmit(host, sourceFile);
-                }
-            }
-        }
-
-        function onSingleFileEmit(host: EmitHost, sourceFile: SourceFile) {
-            // JavaScript files are always LanguageVariant.JSX, as JSX syntax is allowed in .js files also.
-            // So for JavaScript files, '.jsx' is only emitted if the input was '.jsx', and JsxEmit.Preserve.
-            // For TypeScript, the only time to emit with a '.jsx' extension, is on JSX input, and JsxEmit.Preserve
-            let extension = ".js";
-            if (options.jsx === JsxEmit.Preserve) {
-                if (isSourceFileJavaScript(sourceFile)) {
-                    if (fileExtensionIs(sourceFile.fileName, ".jsx")) {
-                        extension = ".jsx";
-                    }
-                }
-                else if (sourceFile.languageVariant === LanguageVariant.JSX) {
-                    // TypeScript source file preserving JSX syntax
-                    extension = ".jsx";
-                }
-            }
-            const jsFilePath = getOwnEmitOutputFilePath(sourceFile, host, extension);
-            const declarationFilePath = !isSourceFileJavaScript(sourceFile) && (emitOnlyDtsFiles || options.declaration) ? getDeclarationEmitOutputFilePath(sourceFile, host) : undefined;
-            const emitFileNames: EmitFileNames = {
-                jsFilePath,
-                sourceMapFilePath: getSourceMapFilePath(jsFilePath, options),
-                declarationFilePath
-            };
-            action(emitFileNames, [sourceFile], /*isBundledEmit*/false, emitOnlyDtsFiles);
-        }
-
-        function onBundledEmit(host: EmitHost) {
-            // Can emit only sources that are not declaration file and are either non module code or module with
-            // --module or --target es6 specified. Files included by searching under node_modules are also not emitted.
-            const bundledSources = filter(host.getSourceFiles(),
-                sourceFile => !isDeclarationFile(sourceFile) &&
-                              !host.isSourceFileFromExternalLibrary(sourceFile) &&
-                              (!isExternalModule(sourceFile) ||
-                               !!getEmitModuleKind(options)));
-            if (bundledSources.length) {
-                const jsFilePath = options.outFile || options.out;
-                const emitFileNames: EmitFileNames = {
-                    jsFilePath,
-                    sourceMapFilePath: getSourceMapFilePath(jsFilePath, options),
-                    declarationFilePath: options.declaration ? removeFileExtension(jsFilePath) + ".d.ts" : undefined
-                };
-                action(emitFileNames, bundledSources, /*isBundledEmit*/true, emitOnlyDtsFiles);
-            }
-        }
+    /** Don't call this for `--outFile`, just for `--outDir` or plain emit. `--outFile` needs additional checks. */
+    export function sourceFileMayBeEmitted(sourceFile: SourceFile, options: CompilerOptions, isSourceFileFromExternalLibrary: (file: SourceFile) => boolean) {
+        return !(options.noEmitForJsFiles && isSourceFileJavaScript(sourceFile)) && !sourceFile.isDeclarationFile && !isSourceFileFromExternalLibrary(sourceFile);
     }
 
     export function getSourceFilePathInNewDir(sourceFile: SourceFile, host: EmitHost, newDirPath: string) {
@@ -2707,15 +2569,40 @@ namespace ts {
         });
     }
 
-    export function getSetAccessorTypeAnnotationNode(accessor: AccessorDeclaration): TypeNode {
+    function getSetAccessorValueParameter(accessor: SetAccessorDeclaration): ParameterDeclaration | undefined {
         if (accessor && accessor.parameters.length > 0) {
-            const hasThis = accessor.parameters.length === 2 &&
-                accessor.parameters[0].name.kind === SyntaxKind.Identifier &&
-                (accessor.parameters[0].name as Identifier).originalKeywordKind === SyntaxKind.ThisKeyword;
-            return accessor.parameters[hasThis ? 1 : 0].type;
+            const hasThis = accessor.parameters.length === 2 && parameterIsThisKeyword(accessor.parameters[0]);
+            return accessor.parameters[hasThis ? 1 : 0];
+        }
+    }
+
+    /** Get the type annotation for the value parameter. */
+    export function getSetAccessorTypeAnnotationNode(accessor: SetAccessorDeclaration): TypeNode {
+        const parameter = getSetAccessorValueParameter(accessor);
+        return parameter && parameter.type;
+    }
+
+    export function getThisParameter(signature: SignatureDeclaration): ParameterDeclaration | undefined {
+        if (signature.parameters.length) {
+            const thisParameter = signature.parameters[0];
+            if (parameterIsThisKeyword(thisParameter)) {
+                return thisParameter;
+            }
         }
     }
 
+    export function parameterIsThisKeyword(parameter: ParameterDeclaration): boolean {
+        return isThisIdentifier(parameter.name);
+    }
+
+    export function isThisIdentifier(node: Node | undefined): boolean {
+        return node && node.kind === SyntaxKind.Identifier && identifierIsThisKeyword(node as Identifier);
+    }
+
+    export function identifierIsThisKeyword(id: Identifier): boolean {
+        return id.originalKeywordKind === SyntaxKind.ThisKeyword;
+    }
+
     export interface AllAccessorDeclarations {
         firstAccessor: AccessorDeclaration;
         secondAccessor: AccessorDeclaration;
@@ -2744,7 +2631,7 @@ namespace ts {
             forEach(declarations, (member: Declaration) => {
                 if ((member.kind === SyntaxKind.GetAccessor || member.kind === SyntaxKind.SetAccessor)
                     && hasModifier(member, ModifierFlags.Static) === hasModifier(accessor, ModifierFlags.Static)) {
-                    const memberName = getPropertyNameForPropertyNameNode(member.name);
+                    const memberName = getPropertyNameForPropertyNameNode((member as NamedDeclaration).name);
                     const accessorName = getPropertyNameForPropertyNameNode(accessor.name);
                     if (memberName === accessorName) {
                         if (!firstAccessor) {
@@ -2773,15 +2660,64 @@ namespace ts {
         };
     }
 
-    export function emitNewLineBeforeLeadingComments(lineMap: number[], writer: EmitTextWriter, node: TextRange, leadingComments: CommentRange[]) {
-        emitNewLineBeforeLeadingCommentsOfPosition(lineMap, writer, node.pos, leadingComments);
+    /**
+     * Gets the effective type annotation of a variable, parameter, or property. If the node was
+     * parsed in a JavaScript file, gets the type annotation from JSDoc.
+     */
+    export function getEffectiveTypeAnnotationNode(node: VariableLikeDeclaration): TypeNode {
+        if (node.type) {
+            return node.type;
+        }
+        if (node.flags & NodeFlags.JavaScriptFile) {
+            return getJSDocType(node);
+        }
     }
 
-    export function emitNewLineBeforeLeadingCommentsOfPosition(lineMap: number[], writer: EmitTextWriter, pos: number, leadingComments: CommentRange[]) {
-        // If the leading comments start on different line than the start of node, write new line
-        if (leadingComments && leadingComments.length && pos !== leadingComments[0].pos &&
-            getLineOfLocalPositionFromLineMap(lineMap, pos) !== getLineOfLocalPositionFromLineMap(lineMap, leadingComments[0].pos)) {
-            writer.writeLine();
+    /**
+     * Gets the effective return type annotation of a signature. If the node was parsed in a
+     * JavaScript file, gets the return type annotation from JSDoc.
+     */
+    export function getEffectiveReturnTypeNode(node: SignatureDeclaration): TypeNode {
+        if (node.type) {
+            return node.type;
+        }
+        if (node.flags & NodeFlags.JavaScriptFile) {
+            return getJSDocReturnType(node);
+        }
+    }
+
+    /**
+     * Gets the effective type parameters. If the node was parsed in a
+     * JavaScript file, gets the type parameters from the `@template` tag from JSDoc.
+     */
+    export function getEffectiveTypeParameterDeclarations(node: DeclarationWithTypeParameters): TypeParameterDeclaration[] {
+        if (node.typeParameters) {
+            return node.typeParameters;
+        }
+        if (node.flags & NodeFlags.JavaScriptFile) {
+            const templateTag = getJSDocTemplateTag(node);
+            return templateTag && templateTag.typeParameters;
+        }
+    }
+
+    /**
+     * Gets the effective type annotation of the value parameter of a set accessor. If the node
+     * was parsed in a JavaScript file, gets the type annotation from JSDoc.
+     */
+    export function getEffectiveSetAccessorTypeAnnotationNode(node: SetAccessorDeclaration): TypeNode {
+        const parameter = getSetAccessorValueParameter(node);
+        return parameter && getEffectiveTypeAnnotationNode(parameter);
+    }
+
+    export function emitNewLineBeforeLeadingComments(lineMap: number[], writer: EmitTextWriter, node: TextRange, leadingComments: CommentRange[]) {
+        emitNewLineBeforeLeadingCommentsOfPosition(lineMap, writer, node.pos, leadingComments);
+    }
+
+    export function emitNewLineBeforeLeadingCommentsOfPosition(lineMap: number[], writer: EmitTextWriter, pos: number, leadingComments: CommentRange[]) {
+        // If the leading comments start on different line than the start of node, write new line
+        if (leadingComments && leadingComments.length && pos !== leadingComments[0].pos &&
+            getLineOfLocalPositionFromLineMap(lineMap, pos) !== getLineOfLocalPositionFromLineMap(lineMap, leadingComments[0].pos)) {
+            writer.writeLine();
         }
     }
 
@@ -2830,7 +2766,7 @@ namespace ts {
         writeComment: (text: string, lineMap: number[], writer: EmitTextWriter, commentPos: number, commentEnd: number, newLine: string) => void,
         node: TextRange, newLine: string, removeComments: boolean) {
         let leadingComments: CommentRange[];
-        let currentDetachedCommentInfo: {nodePos: number, detachedCommentEndPos: number};
+        let currentDetachedCommentInfo: { nodePos: number, detachedCommentEndPos: number };
         if (removeComments) {
             // removeComments is true, only reserve pinned comment at the top of file
             // For example:
@@ -3001,6 +2937,14 @@ namespace ts {
             return node.modifierFlagsCache & ~ModifierFlags.HasComputedFlags;
         }
 
+        const flags = getModifierFlagsNoCache(node);
+        node.modifierFlagsCache = flags | ModifierFlags.HasComputedFlags;
+        return flags;
+    }
+
+    /* @internal */
+    export function getModifierFlagsNoCache(node: Node): ModifierFlags {
+
         let flags = ModifierFlags.None;
         if (node.modifiers) {
             for (const modifier of node.modifiers) {
@@ -3008,11 +2952,10 @@ namespace ts {
             }
         }
 
-        if (node.flags & NodeFlags.NestedNamespace) {
+        if (node.flags & NodeFlags.NestedNamespace || (node.kind === SyntaxKind.Identifier && (<Identifier>node).isInJSDocNamespace)) {
             flags |= ModifierFlags.Export;
         }
 
-        node.modifierFlagsCache = flags | ModifierFlags.HasComputedFlags;
         return flags;
     }
 
@@ -3052,13 +2995,21 @@ namespace ts {
         }
     }
 
-    export function isDestructuringAssignment(node: Node): node is BinaryExpression {
-        if (isBinaryExpression(node)) {
-            if (node.operatorToken.kind === SyntaxKind.EqualsToken) {
-                const kind = node.left.kind;
-                return kind === SyntaxKind.ObjectLiteralExpression
-                    || kind === SyntaxKind.ArrayLiteralExpression;
-            }
+    export function isAssignmentExpression(node: Node, excludeCompoundAssignment: true): node is AssignmentExpression<EqualsToken>;
+    export function isAssignmentExpression(node: Node, excludeCompoundAssignment?: false): node is AssignmentExpression<AssignmentOperatorToken>;
+    export function isAssignmentExpression(node: Node, excludeCompoundAssignment?: boolean): node is AssignmentExpression<AssignmentOperatorToken> {
+        return isBinaryExpression(node)
+            && (excludeCompoundAssignment
+                ? node.operatorToken.kind === SyntaxKind.EqualsToken
+                : isAssignmentOperator(node.operatorToken.kind))
+            && isLeftHandSideExpression(node.left);
+    }
+
+    export function isDestructuringAssignment(node: Node): node is DestructuringAssignment {
+        if (isAssignmentExpression(node, /*excludeCompoundAssignment*/ true)) {
+            const kind = node.left.kind;
+            return kind === SyntaxKind.ObjectLiteralExpression
+                || kind === SyntaxKind.ArrayLiteralExpression;
         }
 
         return false;
@@ -3086,6 +3037,15 @@ namespace ts {
         return tryGetClassExtendingExpressionWithTypeArguments(node) !== undefined;
     }
 
+    export function isExpressionWithTypeArgumentsInClassImplementsClause(node: Node): node is ExpressionWithTypeArguments {
+        return node.kind === SyntaxKind.ExpressionWithTypeArguments
+            && isEntityNameExpression((node as ExpressionWithTypeArguments).expression)
+            && node.parent
+            && (<HeritageClause>node.parent).token === SyntaxKind.ImplementsKeyword
+            && node.parent.parent
+            && isClassLike(node.parent.parent);
+    }
+
     export function isEntityNameExpression(node: Expression): node is EntityNameExpression {
         return node.kind === SyntaxKind.Identifier ||
             node.kind === SyntaxKind.PropertyAccessExpression && isEntityNameExpression((<PropertyAccessExpression>node).expression);
@@ -3096,19 +3056,22 @@ namespace ts {
             (node.parent.kind === SyntaxKind.PropertyAccessExpression && (<PropertyAccessExpression>node.parent).name === node);
     }
 
-    export function isEmptyObjectLiteralOrArrayLiteral(expression: Node): boolean {
-        const kind = expression.kind;
-        if (kind === SyntaxKind.ObjectLiteralExpression) {
-            return (<ObjectLiteralExpression>expression).properties.length === 0;
-        }
-        if (kind === SyntaxKind.ArrayLiteralExpression) {
-            return (<ArrayLiteralExpression>expression).elements.length === 0;
-        }
-        return false;
+    export function isEmptyObjectLiteral(expression: Node): boolean {
+        return expression.kind === SyntaxKind.ObjectLiteralExpression &&
+            (<ObjectLiteralExpression>expression).properties.length === 0;
+    }
+
+    export function isEmptyArrayLiteral(expression: Node): boolean {
+        return expression.kind === SyntaxKind.ArrayLiteralExpression &&
+            (<ArrayLiteralExpression>expression).elements.length === 0;
     }
 
     export function getLocalSymbolForExportDefault(symbol: Symbol) {
-        return symbol && symbol.valueDeclaration && hasModifier(symbol.valueDeclaration, ModifierFlags.Default) ? symbol.valueDeclaration.localSymbol : undefined;
+        return isExportDefaultSymbol(symbol) ? symbol.declarations[0].localSymbol : undefined;
+    }
+
+    function isExportDefaultSymbol(symbol: Symbol): boolean {
+        return symbol && length(symbol.declarations) > 0 && hasModifier(symbol.declarations[0], ModifierFlags.Default);
     }
 
     /** Return ".ts", ".d.ts", or ".tsx", if that is the extension. */
@@ -3153,55 +3116,6 @@ namespace ts {
         return output;
     }
 
-    /**
-     * Serialize an object graph into a JSON string. This is intended only for use on an acyclic graph
-     * as the fallback implementation does not check for circular references by default.
-     */
-    export const stringify: (value: any) => string = typeof JSON !== "undefined" && JSON.stringify
-        ? JSON.stringify
-        : stringifyFallback;
-
-    /**
-     * Serialize an object graph into a JSON string.
-     */
-    function stringifyFallback(value: any): string {
-        // JSON.stringify returns `undefined` here, instead of the string "undefined".
-        return value === undefined ? undefined : stringifyValue(value);
-    }
-
-    function stringifyValue(value: any): string {
-        return typeof value === "string" ? `"${escapeString(value)}"`
-             : typeof value === "number" ? isFinite(value) ? String(value) : "null"
-             : typeof value === "boolean" ? value ? "true" : "false"
-             : typeof value === "object" && value ? isArray(value) ? cycleCheck(stringifyArray, value) : cycleCheck(stringifyObject, value)
-             : /*fallback*/ "null";
-    }
-
-    function cycleCheck(cb: (value: any) => string, value: any) {
-        Debug.assert(!value.hasOwnProperty("__cycle"), "Converting circular structure to JSON");
-        value.__cycle = true;
-        const result = cb(value);
-        delete value.__cycle;
-        return result;
-    }
-
-    function stringifyArray(value: any) {
-        return `[${reduceLeft(value, stringifyElement, "")}]`;
-    }
-
-    function stringifyElement(memo: string, value: any) {
-        return (memo ? memo + "," : memo) + stringifyValue(value);
-    }
-
-    function stringifyObject(value: any) {
-        return `{${reduceOwnProperties(value, stringifyProperty, "")}}`;
-    }
-
-    function stringifyProperty(memo: string, value: any, key: string) {
-        return value === undefined || typeof value === "function" || key === "__cycle" ? memo
-             : (memo ? memo + "," : memo) + `"${escapeString(key)}":${stringifyValue(value)}`;
-    }
-
     const base64Digits = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
 
     /**
@@ -3242,14 +3156,14 @@ namespace ts {
 
     const carriageReturnLineFeed = "\r\n";
     const lineFeed = "\n";
-    export function getNewLineCharacter(options: CompilerOptions): string {
-        if (options.newLine === NewLineKind.CarriageReturnLineFeed) {
-            return carriageReturnLineFeed;
-        }
-        else if (options.newLine === NewLineKind.LineFeed) {
-            return lineFeed;
-        }
-        else if (sys) {
+    export function getNewLineCharacter(options: CompilerOptions | PrinterOptions): string {
+        switch (options.newLine) {
+            case NewLineKind.CarriageReturnLineFeed:
+                return carriageReturnLineFeed;
+            case NewLineKind.LineFeed:
+                return lineFeed;
+        }
+        if (sys) {
             return sys.newLine;
         }
         return carriageReturnLineFeed;
@@ -3330,24 +3244,84 @@ namespace ts {
         return false;
     }
 
-    const syntaxKindCache = createMap<string>();
-
-    export function formatSyntaxKind(kind: SyntaxKind): string {
-        const syntaxKindEnum = (<any>ts).SyntaxKind;
-        if (syntaxKindEnum) {
-            if (syntaxKindCache[kind]) {
-                return syntaxKindCache[kind];
-            }
-
-            for (const name in syntaxKindEnum) {
-                if (syntaxKindEnum[name] === kind) {
-                    return syntaxKindCache[kind] = kind.toString() + " (" + name + ")";
+    /**
+     * Formats an enum value as a string for debugging and debug assertions.
+     */
+    function formatEnum(value = 0, enumObject: any, isFlags?: boolean) {
+        const members = getEnumMembers(enumObject);
+        if (value === 0) {
+            return members.length > 0 && members[0][0] === 0 ? members[0][1] : "0";
+        }
+        if (isFlags) {
+            let result = "";
+            let remainingFlags = value;
+            for (let i = members.length - 1; i >= 0 && remainingFlags !== 0; i--) {
+                const [enumValue, enumName] = members[i];
+                if (enumValue !== 0 && (remainingFlags & enumValue) === enumValue) {
+                    remainingFlags &= ~enumValue;
+                    result = `${enumName}${result ? ", " : ""}${result}`;
                 }
             }
+            if (remainingFlags === 0) {
+                return result;
+            }
         }
         else {
-            return kind.toString();
+            for (const [enumValue, enumName] of members) {
+                if (enumValue === value) {
+                    return enumName;
+                }
+            }
+        }
+        return value.toString();
+    }
+
+    function getEnumMembers(enumObject: any) {
+        const result: [number, string][] = [];
+        for (const name in enumObject) {
+            const value = enumObject[name];
+            if (typeof value === "number") {
+                result.push([value, name]);
+            }
         }
+
+        return stableSort(result, (x, y) => compareValues(x[0], y[0]));
+    }
+
+    export function formatSyntaxKind(kind: SyntaxKind): string {
+        return formatEnum(kind, (<any>ts).SyntaxKind, /*isFlags*/ false);
+    }
+
+    export function formatModifierFlags(flags: ModifierFlags): string {
+        return formatEnum(flags, (<any>ts).ModifierFlags, /*isFlags*/ true);
+    }
+
+    export function formatTransformFlags(flags: TransformFlags): string {
+        return formatEnum(flags, (<any>ts).TransformFlags, /*isFlags*/ true);
+    }
+
+    export function formatEmitFlags(flags: EmitFlags): string {
+        return formatEnum(flags, (<any>ts).EmitFlags, /*isFlags*/ true);
+    }
+
+    export function formatSymbolFlags(flags: SymbolFlags): string {
+        return formatEnum(flags, (<any>ts).SymbolFlags, /*isFlags*/ true);
+    }
+
+    export function formatTypeFlags(flags: TypeFlags): string {
+        return formatEnum(flags, (<any>ts).TypeFlags, /*isFlags*/ true);
+    }
+
+    export function formatObjectFlags(flags: ObjectFlags): string {
+        return formatEnum(flags, (<any>ts).ObjectFlags, /*isFlags*/ true);
+    }
+
+    export function getRangePos(range: TextRange | undefined) {
+        return range ? range.pos : -1;
+    }
+
+    export function getRangeEnd(range: TextRange | undefined) {
+        return range ? range.end : -1;
     }
 
     /**
@@ -3444,7 +3418,7 @@ namespace ts {
      * @param token The token.
      */
     export function createTokenRange(pos: number, token: SyntaxKind): TextRange {
-        return createRange(pos,  pos + tokenToString(token).length);
+        return createRange(pos, pos + tokenToString(token).length);
     }
 
     export function rangeIsOnSingleLine(range: TextRange, sourceFile: SourceFile) {
@@ -3476,64 +3450,20 @@ namespace ts {
         return positionIsSynthesized(range.pos) ? -1 : skipTrivia(sourceFile.text, range.pos);
     }
 
-    export function collectExternalModuleInfo(sourceFile: SourceFile, resolver: EmitResolver) {
-        const externalImports: (ImportDeclaration | ImportEqualsDeclaration | ExportDeclaration)[] = [];
-        const exportSpecifiers = createMap<ExportSpecifier[]>();
-        let exportEquals: ExportAssignment = undefined;
-        let hasExportStarsToExportValues = false;
-        for (const node of sourceFile.statements) {
-            switch (node.kind) {
-                case SyntaxKind.ImportDeclaration:
-                    if (!(<ImportDeclaration>node).importClause ||
-                        resolver.isReferencedAliasDeclaration((<ImportDeclaration>node).importClause, /*checkChildren*/ true)) {
-                        // import "mod"
-                        // import x from "mod" where x is referenced
-                        // import * as x from "mod" where x is referenced
-                        // import { x, y } from "mod" where at least one import is referenced
-                        externalImports.push(<ImportDeclaration>node);
-                    }
-                    break;
-
-                case SyntaxKind.ImportEqualsDeclaration:
-                    if ((<ImportEqualsDeclaration>node).moduleReference.kind === SyntaxKind.ExternalModuleReference && resolver.isReferencedAliasDeclaration(node)) {
-                        // import x = require("mod") where x is referenced
-                        externalImports.push(<ImportEqualsDeclaration>node);
-                    }
-                    break;
-
-                case SyntaxKind.ExportDeclaration:
-                    if ((<ExportDeclaration>node).moduleSpecifier) {
-                        if (!(<ExportDeclaration>node).exportClause) {
-                            // export * from "mod"
-                            if (resolver.moduleExportsSomeValue((<ExportDeclaration>node).moduleSpecifier)) {
-                                externalImports.push(<ExportDeclaration>node);
-                                hasExportStarsToExportValues = true;
-                            }
-                        }
-                        else if (resolver.isValueAliasDeclaration(node)) {
-                            // export { x, y } from "mod" where at least one export is a value symbol
-                            externalImports.push(<ExportDeclaration>node);
-                        }
-                    }
-                    else {
-                        // export { x, y }
-                        for (const specifier of (<ExportDeclaration>node).exportClause.elements) {
-                            const name = (specifier.propertyName || specifier.name).text;
-                            (exportSpecifiers[name] || (exportSpecifiers[name] = [])).push(specifier);
-                        }
-                    }
-                    break;
-
-                case SyntaxKind.ExportAssignment:
-                    if ((<ExportAssignment>node).isExportEquals && !exportEquals) {
-                        // export = x
-                        exportEquals = <ExportAssignment>node;
-                    }
-                    break;
+    /**
+     * Determines whether a name was originally the declaration name of an enum or namespace
+     * declaration.
+     */
+    export function isDeclarationNameOfEnumOrNamespace(node: Identifier) {
+        const parseNode = getParseTreeNode(node);
+        if (parseNode) {
+            switch (parseNode.parent.kind) {
+                case SyntaxKind.EnumDeclaration:
+                case SyntaxKind.ModuleDeclaration:
+                    return parseNode === (<EnumDeclaration | ModuleDeclaration>parseNode.parent).name;
             }
         }
-
-        return { externalImports, exportSpecifiers, exportEquals, hasExportStarsToExportValues };
+        return false;
     }
 
     export function getInitializedVariables(node: VariableDeclarationList) {
@@ -3569,141 +3499,1365 @@ namespace ts {
         return node.symbol && getDeclarationOfKind(node.symbol, kind) === node;
     }
 
-    // Node tests
-    //
-    // All node tests in the following list should *not* reference parent pointers so that
-    // they may be used with transformations.
-
-    // Node Arrays
-
-    export function isNodeArray<T extends Node>(array: T[]): array is NodeArray<T> {
-        return array.hasOwnProperty("pos")
-            && array.hasOwnProperty("end");
-    }
-
-    // Literals
-
-    export function isNoSubstitutionTemplateLiteral(node: Node): node is LiteralExpression {
-        return node.kind === SyntaxKind.NoSubstitutionTemplateLiteral;
+    export function isWatchSet(options: CompilerOptions) {
+        // Firefox has Object.prototype.watch
+        return options.watch && options.hasOwnProperty("watch");
     }
 
-    export function isLiteralKind(kind: SyntaxKind): boolean {
-        return SyntaxKind.FirstLiteralToken <= kind && kind <= SyntaxKind.LastLiteralToken;
+    export function getCheckFlags(symbol: Symbol): CheckFlags {
+        return symbol.flags & SymbolFlags.Transient ? (<TransientSymbol>symbol).checkFlags : 0;
     }
 
-    export function isTextualLiteralKind(kind: SyntaxKind): boolean {
-        return kind === SyntaxKind.StringLiteral || kind === SyntaxKind.NoSubstitutionTemplateLiteral;
+    export function getDeclarationModifierFlagsFromSymbol(s: Symbol): ModifierFlags {
+        if (s.valueDeclaration) {
+            const flags = getCombinedModifierFlags(s.valueDeclaration);
+            return s.parent && s.parent.flags & SymbolFlags.Class ? flags : flags & ~ModifierFlags.AccessibilityModifier;
+        }
+        if (getCheckFlags(s) & CheckFlags.Synthetic) {
+            const checkFlags = (<TransientSymbol>s).checkFlags;
+            const accessModifier = checkFlags & CheckFlags.ContainsPrivate ? ModifierFlags.Private :
+                checkFlags & CheckFlags.ContainsPublic ? ModifierFlags.Public :
+                    ModifierFlags.Protected;
+            const staticModifier = checkFlags & CheckFlags.ContainsStatic ? ModifierFlags.Static : 0;
+            return accessModifier | staticModifier;
+        }
+        if (s.flags & SymbolFlags.Prototype) {
+            return ModifierFlags.Public | ModifierFlags.Static;
+        }
+        return 0;
     }
 
-    export function isLiteralExpression(node: Node): node is LiteralExpression {
-        return isLiteralKind(node.kind);
+    export function levenshtein(s1: string, s2: string): number {
+        let previous: number[] = new Array(s2.length + 1);
+        let current: number[] = new Array(s2.length + 1);
+        for (let i = 0; i < s2.length + 1; i++) {
+            previous[i] = i;
+            current[i] = -1;
+        }
+        for (let i = 1; i < s1.length + 1; i++) {
+            current[0] = i;
+            for (let j = 1; j < s2.length + 1; j++) {
+                current[j] = Math.min(
+                    previous[j] + 1,
+                    current[j - 1] + 1,
+                    previous[j - 1] + (s1[i - 1] === s2[j - 1] ? 0 : 2));
+            }
+            // shift current back to previous, and then reuse previous' array
+            const tmp = previous;
+            previous = current;
+            current = tmp;
+        }
+        return previous[previous.length - 1];
     }
+}
 
-    // Pseudo-literals
-
-    export function isTemplateLiteralKind(kind: SyntaxKind): boolean {
-        return SyntaxKind.FirstTemplateToken <= kind && kind <= SyntaxKind.LastTemplateToken;
+namespace ts {
+    export function getDefaultLibFileName(options: CompilerOptions): string {
+        switch (options.target) {
+            case ScriptTarget.ESNext:
+                return "lib.esnext.full.d.ts";
+            case ScriptTarget.ES2017:
+                return "lib.es2017.full.d.ts";
+            case ScriptTarget.ES2016:
+                return "lib.es2016.full.d.ts";
+            case ScriptTarget.ES2015:
+                return "lib.es6.d.ts";  // We don't use lib.es2015.full.d.ts due to breaking change.
+            default:
+                return "lib.d.ts";
+        }
     }
 
-    function isTemplateLiteralFragmentKind(kind: SyntaxKind) {
-        return kind === SyntaxKind.TemplateHead
-            || kind === SyntaxKind.TemplateMiddle
-            || kind === SyntaxKind.TemplateTail;
+    export function textSpanEnd(span: TextSpan) {
+        return span.start + span.length;
     }
 
-    export function isTemplateLiteralFragment(node: Node): node is TemplateLiteralFragment {
-        return isTemplateLiteralFragmentKind(node.kind);
+    export function textSpanIsEmpty(span: TextSpan) {
+        return span.length === 0;
     }
 
-    // Identifiers
-
-    export function isIdentifier(node: Node): node is Identifier {
-        return node.kind === SyntaxKind.Identifier;
+    export function textSpanContainsPosition(span: TextSpan, position: number) {
+        return position >= span.start && position < textSpanEnd(span);
     }
 
-    export function isGeneratedIdentifier(node: Node): boolean {
-        // Using `>` here catches both `GeneratedIdentifierKind.None` and `undefined`.
-        return isIdentifier(node) && node.autoGenerateKind > GeneratedIdentifierKind.None;
+    // Returns true if 'span' contains 'other'.
+    export function textSpanContainsTextSpan(span: TextSpan, other: TextSpan) {
+        return other.start >= span.start && textSpanEnd(other) <= textSpanEnd(span);
     }
 
-    // Keywords
-
-    export function isModifier(node: Node): node is Modifier {
-        return isModifierKind(node.kind);
+    export function textSpanOverlapsWith(span: TextSpan, other: TextSpan) {
+        const overlapStart = Math.max(span.start, other.start);
+        const overlapEnd = Math.min(textSpanEnd(span), textSpanEnd(other));
+        return overlapStart < overlapEnd;
     }
 
-    // Names
-
-    export function isQualifiedName(node: Node): node is QualifiedName {
-        return node.kind === SyntaxKind.QualifiedName;
+    export function textSpanOverlap(span1: TextSpan, span2: TextSpan) {
+        const overlapStart = Math.max(span1.start, span2.start);
+        const overlapEnd = Math.min(textSpanEnd(span1), textSpanEnd(span2));
+        if (overlapStart < overlapEnd) {
+            return createTextSpanFromBounds(overlapStart, overlapEnd);
+        }
+        return undefined;
     }
 
-    export function isComputedPropertyName(node: Node): node is ComputedPropertyName {
-        return node.kind === SyntaxKind.ComputedPropertyName;
+    export function textSpanIntersectsWithTextSpan(span: TextSpan, other: TextSpan) {
+        return other.start <= textSpanEnd(span) && textSpanEnd(other) >= span.start;
     }
 
-    export function isEntityName(node: Node): node is EntityName {
-        const kind = node.kind;
-        return kind === SyntaxKind.QualifiedName
-            || kind === SyntaxKind.Identifier;
+    export function textSpanIntersectsWith(span: TextSpan, start: number, length: number) {
+        const end = start + length;
+        return start <= textSpanEnd(span) && end >= span.start;
     }
 
-    export function isPropertyName(node: Node): node is PropertyName {
-        const kind = node.kind;
-        return kind === SyntaxKind.Identifier
-            || kind === SyntaxKind.StringLiteral
-            || kind === SyntaxKind.NumericLiteral
-            || kind === SyntaxKind.ComputedPropertyName;
+    export function decodedTextSpanIntersectsWith(start1: number, length1: number, start2: number, length2: number) {
+        const end1 = start1 + length1;
+        const end2 = start2 + length2;
+        return start2 <= end1 && end2 >= start1;
     }
 
-    export function isModuleName(node: Node): node is ModuleName {
-        const kind = node.kind;
-        return kind === SyntaxKind.Identifier
-            || kind === SyntaxKind.StringLiteral;
+    export function textSpanIntersectsWithPosition(span: TextSpan, position: number) {
+        return position <= textSpanEnd(span) && position >= span.start;
     }
 
-    export function isBindingName(node: Node): node is BindingName {
-        const kind = node.kind;
-        return kind === SyntaxKind.Identifier
-            || kind === SyntaxKind.ObjectBindingPattern
-            || kind === SyntaxKind.ArrayBindingPattern;
+    export function textSpanIntersection(span1: TextSpan, span2: TextSpan) {
+        const intersectStart = Math.max(span1.start, span2.start);
+        const intersectEnd = Math.min(textSpanEnd(span1), textSpanEnd(span2));
+        if (intersectStart <= intersectEnd) {
+            return createTextSpanFromBounds(intersectStart, intersectEnd);
+        }
+        return undefined;
     }
 
-    // Signature elements
+    export function createTextSpan(start: number, length: number): TextSpan {
+        if (start < 0) {
+            throw new Error("start < 0");
+        }
+        if (length < 0) {
+            throw new Error("length < 0");
+        }
 
-    export function isTypeParameter(node: Node): node is TypeParameterDeclaration {
-        return node.kind === SyntaxKind.TypeParameter;
+        return { start, length };
     }
 
-    export function isParameter(node: Node): node is ParameterDeclaration {
-        return node.kind === SyntaxKind.Parameter;
+    export function createTextSpanFromBounds(start: number, end: number) {
+        return createTextSpan(start, end - start);
     }
 
-    export function isDecorator(node: Node): node is Decorator {
-        return node.kind === SyntaxKind.Decorator;
+    export function textChangeRangeNewSpan(range: TextChangeRange) {
+        return createTextSpan(range.span.start, range.newLength);
     }
 
-    // Type members
-
-    export function isMethodDeclaration(node: Node): node is MethodDeclaration {
-        return node.kind === SyntaxKind.MethodDeclaration;
+    export function textChangeRangeIsUnchanged(range: TextChangeRange) {
+        return textSpanIsEmpty(range.span) && range.newLength === 0;
     }
 
-    export function isClassElement(node: Node): node is ClassElement {
-        const kind = node.kind;
-        return kind === SyntaxKind.Constructor
+    export function createTextChangeRange(span: TextSpan, newLength: number): TextChangeRange {
+        if (newLength < 0) {
+            throw new Error("newLength < 0");
+        }
+
+        return { span, newLength };
+    }
+
+    export let unchangedTextChangeRange = createTextChangeRange(createTextSpan(0, 0), 0);
+
+    /**
+     * Called to merge all the changes that occurred across several versions of a script snapshot
+     * into a single change.  i.e. if a user keeps making successive edits to a script we will
+     * have a text change from V1 to V2, V2 to V3, ..., Vn.
+     *
+     * This function will then merge those changes into a single change range valid between V1 and
+     * Vn.
+     */
+    export function collapseTextChangeRangesAcrossMultipleVersions(changes: TextChangeRange[]): TextChangeRange {
+        if (changes.length === 0) {
+            return unchangedTextChangeRange;
+        }
+
+        if (changes.length === 1) {
+            return changes[0];
+        }
+
+        // We change from talking about { { oldStart, oldLength }, newLength } to { oldStart, oldEnd, newEnd }
+        // as it makes things much easier to reason about.
+        const change0 = changes[0];
+
+        let oldStartN = change0.span.start;
+        let oldEndN = textSpanEnd(change0.span);
+        let newEndN = oldStartN + change0.newLength;
+
+        for (let i = 1; i < changes.length; i++) {
+            const nextChange = changes[i];
+
+            // Consider the following case:
+            // i.e. two edits.  The first represents the text change range { { 10, 50 }, 30 }.  i.e. The span starting
+            // at 10, with length 50 is reduced to length 30.  The second represents the text change range { { 30, 30 }, 40 }.
+            // i.e. the span starting at 30 with length 30 is increased to length 40.
+            //
+            //      0         10        20        30        40        50        60        70        80        90        100
+            //      -------------------------------------------------------------------------------------------------------
+            //                |                                                 /
+            //                |                                            /----
+            //  T1            |                                       /----
+            //                |                                  /----
+            //                |                             /----
+            //      -------------------------------------------------------------------------------------------------------
+            //                                     |                            \
+            //                                     |                               \
+            //   T2                                |                                 \
+            //                                     |                                   \
+            //                                     |                                      \
+            //      -------------------------------------------------------------------------------------------------------
+            //
+            // Merging these turns out to not be too difficult.  First, determining the new start of the change is trivial
+            // it's just the min of the old and new starts.  i.e.:
+            //
+            //      0         10        20        30        40        50        60        70        80        90        100
+            //      ------------------------------------------------------------*------------------------------------------
+            //                |                                                 /
+            //                |                                            /----
+            //  T1            |                                       /----
+            //                |                                  /----
+            //                |                             /----
+            //      ----------------------------------------$-------------------$------------------------------------------
+            //                .                    |                            \
+            //                .                    |                               \
+            //   T2           .                    |                                 \
+            //                .                    |                                   \
+            //                .                    |                                      \
+            //      ----------------------------------------------------------------------*--------------------------------
+            //
+            // (Note the dots represent the newly inferred start.
+            // Determining the new and old end is also pretty simple.  Basically it boils down to paying attention to the
+            // absolute positions at the asterisks, and the relative change between the dollar signs. Basically, we see
+            // which if the two $'s precedes the other, and we move that one forward until they line up.  in this case that
+            // means:
+            //
+            //      0         10        20        30        40        50        60        70        80        90        100
+            //      --------------------------------------------------------------------------------*----------------------
+            //                |                                                                     /
+            //                |                                                                /----
+            //  T1            |                                                           /----
+            //                |                                                      /----
+            //                |                                                 /----
+            //      ------------------------------------------------------------$------------------------------------------
+            //                .                    |                            \
+            //                .                    |                               \
+            //   T2           .                    |                                 \
+            //                .                    |                                   \
+            //                .                    |                                      \
+            //      ----------------------------------------------------------------------*--------------------------------
+            //
+            // In other words (in this case), we're recognizing that the second edit happened after where the first edit
+            // ended with a delta of 20 characters (60 - 40).  Thus, if we go back in time to where the first edit started
+            // that's the same as if we started at char 80 instead of 60.
+            //
+            // As it so happens, the same logic applies if the second edit precedes the first edit.  In that case rather
+            // than pushing the first edit forward to match the second, we'll push the second edit forward to match the
+            // first.
+            //
+            // In this case that means we have { oldStart: 10, oldEnd: 80, newEnd: 70 } or, in TextChangeRange
+            // semantics: { { start: 10, length: 70 }, newLength: 60 }
+            //
+            // The math then works out as follows.
+            // If we have { oldStart1, oldEnd1, newEnd1 } and { oldStart2, oldEnd2, newEnd2 } then we can compute the
+            // final result like so:
+            //
+            // {
+            //      oldStart3: Min(oldStart1, oldStart2),
+            //      oldEnd3  : Max(oldEnd1, oldEnd1 + (oldEnd2 - newEnd1)),
+            //      newEnd3  : Max(newEnd2, newEnd2 + (newEnd1 - oldEnd2))
+            // }
+
+            const oldStart1 = oldStartN;
+            const oldEnd1 = oldEndN;
+            const newEnd1 = newEndN;
+
+            const oldStart2 = nextChange.span.start;
+            const oldEnd2 = textSpanEnd(nextChange.span);
+            const newEnd2 = oldStart2 + nextChange.newLength;
+
+            oldStartN = Math.min(oldStart1, oldStart2);
+            oldEndN = Math.max(oldEnd1, oldEnd1 + (oldEnd2 - newEnd1));
+            newEndN = Math.max(newEnd2, newEnd2 + (newEnd1 - oldEnd2));
+        }
+
+        return createTextChangeRange(createTextSpanFromBounds(oldStartN, oldEndN), /*newLength*/ newEndN - oldStartN);
+    }
+
+    export function getTypeParameterOwner(d: Declaration): Declaration {
+        if (d && d.kind === SyntaxKind.TypeParameter) {
+            for (let current: Node = d; current; current = current.parent) {
+                if (isFunctionLike(current) || isClassLike(current) || current.kind === SyntaxKind.InterfaceDeclaration) {
+                    return <Declaration>current;
+                }
+            }
+        }
+    }
+
+    export function isParameterPropertyDeclaration(node: Node): boolean {
+        return hasModifier(node, ModifierFlags.ParameterPropertyModifier) && node.parent.kind === SyntaxKind.Constructor && isClassLike(node.parent.parent);
+    }
+
+    function walkUpBindingElementsAndPatterns(node: Node): Node {
+        while (node && (node.kind === SyntaxKind.BindingElement || isBindingPattern(node))) {
+            node = node.parent;
+        }
+
+        return node;
+    }
+
+    export function getCombinedModifierFlags(node: Node): ModifierFlags {
+        node = walkUpBindingElementsAndPatterns(node);
+        let flags = getModifierFlags(node);
+        if (node.kind === SyntaxKind.VariableDeclaration) {
+            node = node.parent;
+        }
+
+        if (node && node.kind === SyntaxKind.VariableDeclarationList) {
+            flags |= getModifierFlags(node);
+            node = node.parent;
+        }
+
+        if (node && node.kind === SyntaxKind.VariableStatement) {
+            flags |= getModifierFlags(node);
+        }
+
+        return flags;
+    }
+
+    // Returns the node flags for this node and all relevant parent nodes.  This is done so that
+    // nodes like variable declarations and binding elements can returned a view of their flags
+    // that includes the modifiers from their container.  i.e. flags like export/declare aren't
+    // stored on the variable declaration directly, but on the containing variable statement
+    // (if it has one).  Similarly, flags for let/const are store on the variable declaration
+    // list.  By calling this function, all those flags are combined so that the client can treat
+    // the node as if it actually had those flags.
+    export function getCombinedNodeFlags(node: Node): NodeFlags {
+        node = walkUpBindingElementsAndPatterns(node);
+
+        let flags = node.flags;
+        if (node.kind === SyntaxKind.VariableDeclaration) {
+            node = node.parent;
+        }
+
+        if (node && node.kind === SyntaxKind.VariableDeclarationList) {
+            flags |= node.flags;
+            node = node.parent;
+        }
+
+        if (node && node.kind === SyntaxKind.VariableStatement) {
+            flags |= node.flags;
+        }
+
+        return flags;
+    }
+
+    /**
+     * Checks to see if the locale is in the appropriate format,
+     * and if it is, attempts to set the appropriate language.
+     */
+    export function validateLocaleAndSetLanguage(
+        locale: string,
+        sys: { getExecutingFilePath(): string, resolvePath(path: string): string, fileExists(fileName: string): boolean, readFile(fileName: string): string },
+        errors?: Diagnostic[]) {
+        const matchResult = /^([a-z]+)([_\-]([a-z]+))?$/.exec(locale.toLowerCase());
+
+        if (!matchResult) {
+            if (errors) {
+                errors.push(createCompilerDiagnostic(Diagnostics.Locale_must_be_of_the_form_language_or_language_territory_For_example_0_or_1, "en", "ja-jp"));
+            }
+            return;
+        }
+
+        const language = matchResult[1];
+        const territory = matchResult[3];
+
+        // First try the entire locale, then fall back to just language if that's all we have.
+        // Either ways do not fail, and fallback to the English diagnostic strings.
+        if (!trySetLanguageAndTerritory(language, territory, errors)) {
+            trySetLanguageAndTerritory(language, /*territory*/ undefined, errors);
+        }
+
+        function trySetLanguageAndTerritory(language: string, territory: string, errors?: Diagnostic[]): boolean {
+            const compilerFilePath = normalizePath(sys.getExecutingFilePath());
+            const containingDirectoryPath = getDirectoryPath(compilerFilePath);
+
+            let filePath = combinePaths(containingDirectoryPath, language);
+
+            if (territory) {
+                filePath = filePath + "-" + territory;
+            }
+
+            filePath = sys.resolvePath(combinePaths(filePath, "diagnosticMessages.generated.json"));
+
+            if (!sys.fileExists(filePath)) {
+                return false;
+            }
+
+            // TODO: Add codePage support for readFile?
+            let fileContents = "";
+            try {
+                fileContents = sys.readFile(filePath);
+            }
+            catch (e) {
+                if (errors) {
+                    errors.push(createCompilerDiagnostic(Diagnostics.Unable_to_open_file_0, filePath));
+                }
+                return false;
+            }
+            try {
+                ts.localizedDiagnosticMessages = JSON.parse(fileContents);
+            }
+            catch (e) {
+                if (errors) {
+                    errors.push(createCompilerDiagnostic(Diagnostics.Corrupted_locale_file_0, filePath));
+                }
+                return false;
+            }
+
+            return true;
+        }
+    }
+
+    export function getOriginalNode(node: Node): Node;
+    export function getOriginalNode<T extends Node>(node: Node, nodeTest: (node: Node) => node is T): T;
+    export function getOriginalNode(node: Node, nodeTest?: (node: Node) => boolean): Node {
+        if (node) {
+            while (node.original !== undefined) {
+                node = node.original;
+            }
+        }
+
+        return !nodeTest || nodeTest(node) ? node : undefined;
+    }
+
+    /**
+     * Gets a value indicating whether a node originated in the parse tree.
+     *
+     * @param node The node to test.
+     */
+    export function isParseTreeNode(node: Node): boolean {
+        return (node.flags & NodeFlags.Synthesized) === 0;
+    }
+
+    /**
+     * Gets the original parse tree node for a node.
+     *
+     * @param node The original node.
+     * @returns The original parse tree node if found; otherwise, undefined.
+     */
+    export function getParseTreeNode(node: Node): Node;
+
+    /**
+     * Gets the original parse tree node for a node.
+     *
+     * @param node The original node.
+     * @param nodeTest A callback used to ensure the correct type of parse tree node is returned.
+     * @returns The original parse tree node if found; otherwise, undefined.
+     */
+    export function getParseTreeNode<T extends Node>(node: Node, nodeTest?: (node: Node) => node is T): T;
+    export function getParseTreeNode(node: Node, nodeTest?: (node: Node) => boolean): Node {
+        if (node === undefined || isParseTreeNode(node)) {
+            return node;
+        }
+
+        node = getOriginalNode(node);
+
+        if (isParseTreeNode(node) && (!nodeTest || nodeTest(node))) {
+            return node;
+        }
+
+        return undefined;
+    }
+
+    /**
+     * Remove extra underscore from escaped identifier text content.
+     *
+     * @param identifier The escaped identifier text.
+     * @returns The unescaped identifier text.
+     */
+    export function unescapeIdentifier(identifier: string): string {
+        return identifier.length >= 3 && identifier.charCodeAt(0) === CharacterCodes._ && identifier.charCodeAt(1) === CharacterCodes._ && identifier.charCodeAt(2) === CharacterCodes._ ? identifier.substr(1) : identifier;
+    }
+
+    export function getNameOfDeclaration(declaration: Declaration): DeclarationName | undefined {
+        if (!declaration) {
+            return undefined;
+        }
+        if (declaration.kind === SyntaxKind.BinaryExpression) {
+            const expr = declaration as BinaryExpression;
+            switch (getSpecialPropertyAssignmentKind(expr)) {
+                case SpecialPropertyAssignmentKind.ExportsProperty:
+                case SpecialPropertyAssignmentKind.ThisProperty:
+                case SpecialPropertyAssignmentKind.Property:
+                case SpecialPropertyAssignmentKind.PrototypeProperty:
+                    return (expr.left as PropertyAccessExpression).name;
+                default:
+                    return undefined;
+            }
+        }
+        else {
+            return (declaration as NamedDeclaration).name;
+        }
+    }
+}
+
+// Simple node tests of the form `node.kind === SyntaxKind.Foo`.
+namespace ts {
+    // Literals
+    export function isNumericLiteral(node: Node): node is NumericLiteral {
+        return node.kind === SyntaxKind.NumericLiteral;
+    }
+
+    export function isStringLiteral(node: Node): node is StringLiteral {
+        return node.kind === SyntaxKind.StringLiteral;
+    }
+
+    export function isJsxText(node: Node): node is JsxText {
+        return node.kind === SyntaxKind.JsxText;
+    }
+
+    export function isRegularExpressionLiteral(node: Node): node is RegularExpressionLiteral {
+        return node.kind === SyntaxKind.RegularExpressionLiteral;
+    }
+
+    export function isNoSubstitutionTemplateLiteral(node: Node): node is LiteralExpression {
+        return node.kind === SyntaxKind.NoSubstitutionTemplateLiteral;
+    }
+
+    // Pseudo-literals
+
+    export function isTemplateHead(node: Node): node is TemplateHead {
+        return node.kind === SyntaxKind.TemplateHead;
+    }
+
+    export function isTemplateMiddle(node: Node): node is TemplateMiddle {
+        return node.kind === SyntaxKind.TemplateMiddle;
+    }
+
+    export function isTemplateTail(node: Node): node is TemplateTail {
+        return node.kind === SyntaxKind.TemplateTail;
+    }
+
+    export function isIdentifier(node: Node): node is Identifier {
+        return node.kind === SyntaxKind.Identifier;
+    }
+
+    // Names
+
+    export function isQualifiedName(node: Node): node is QualifiedName {
+        return node.kind === SyntaxKind.QualifiedName;
+    }
+
+    export function isComputedPropertyName(node: Node): node is ComputedPropertyName {
+        return node.kind === SyntaxKind.ComputedPropertyName;
+    }
+
+    // Signature elements
+
+    export function isTypeParameterDeclaration(node: Node): node is TypeParameterDeclaration {
+        return node.kind === SyntaxKind.TypeParameter;
+    }
+
+    export function isParameter(node: Node): node is ParameterDeclaration {
+        return node.kind === SyntaxKind.Parameter;
+    }
+
+    export function isDecorator(node: Node): node is Decorator {
+        return node.kind === SyntaxKind.Decorator;
+    }
+
+    // TypeMember
+
+    export function isPropertySignature(node: Node): node is PropertySignature {
+        return node.kind === SyntaxKind.PropertySignature;
+    }
+
+    export function isPropertyDeclaration(node: Node): node is PropertyDeclaration {
+        return node.kind === SyntaxKind.PropertyDeclaration;
+    }
+
+    export function isMethodSignature(node: Node): node is MethodSignature {
+        return node.kind === SyntaxKind.MethodSignature;
+    }
+
+    export function isMethodDeclaration(node: Node): node is MethodDeclaration {
+        return node.kind === SyntaxKind.MethodDeclaration;
+    }
+
+    export function isConstructorDeclaration(node: Node): node is ConstructorDeclaration {
+        return node.kind === SyntaxKind.Constructor;
+    }
+
+    export function isGetAccessorDeclaration(node: Node): node is GetAccessorDeclaration {
+        return node.kind === SyntaxKind.GetAccessor;
+    }
+
+    export function isSetAccessorDeclaration(node: Node): node is SetAccessorDeclaration {
+        return node.kind === SyntaxKind.SetAccessor;
+    }
+
+    export function isCallSignatureDeclaration(node: Node): node is CallSignatureDeclaration {
+        return node.kind === SyntaxKind.CallSignature;
+    }
+
+    export function isConstructSignatureDeclaration(node: Node): node is ConstructSignatureDeclaration {
+        return node.kind === SyntaxKind.ConstructSignature;
+    }
+
+    export function isIndexSignatureDeclaration(node: Node): node is IndexSignatureDeclaration {
+        return node.kind === SyntaxKind.IndexSignature;
+    }
+
+    // Type
+
+    export function isTypePredicateNode(node: Node): node is TypePredicateNode {
+        return node.kind === SyntaxKind.TypePredicate;
+    }
+
+    export function isTypeReferenceNode(node: Node): node is TypeReferenceNode {
+        return node.kind === SyntaxKind.TypeReference;
+    }
+
+    export function isFunctionTypeNode(node: Node): node is FunctionTypeNode {
+        return node.kind === SyntaxKind.FunctionType;
+    }
+
+    export function isConstructorTypeNode(node: Node): node is ConstructorTypeNode {
+        return node.kind === SyntaxKind.ConstructorType;
+    }
+
+    export function isTypeQueryNode(node: Node): node is TypeQueryNode {
+        return node.kind === SyntaxKind.TypeQuery;
+    }
+
+    export function isTypeLiteralNode(node: Node): node is TypeLiteralNode {
+        return node.kind === SyntaxKind.TypeLiteral;
+    }
+
+    export function isArrayTypeNode(node: Node): node is ArrayTypeNode {
+        return node.kind === SyntaxKind.ArrayType;
+    }
+
+    export function isTupleTypeNode(node: Node): node is TupleTypeNode {
+        return node.kind === SyntaxKind.TupleType;
+    }
+
+    export function isUnionTypeNode(node: Node): node is UnionTypeNode {
+        return node.kind === SyntaxKind.UnionType;
+    }
+
+    export function isIntersectionTypeNode(node: Node): node is IntersectionTypeNode {
+        return node.kind === SyntaxKind.IntersectionType;
+    }
+
+    export function isParenthesizedTypeNode(node: Node): node is ParenthesizedTypeNode {
+        return node.kind === SyntaxKind.ParenthesizedType;
+    }
+
+    export function isThisTypeNode(node: Node): node is ThisTypeNode {
+        return node.kind === SyntaxKind.ThisType;
+    }
+
+    export function isTypeOperatorNode(node: Node): node is TypeOperatorNode {
+        return node.kind === SyntaxKind.TypeOperator;
+    }
+
+    export function isIndexedAccessTypeNode(node: Node): node is IndexedAccessTypeNode {
+        return node.kind === SyntaxKind.IndexedAccessType;
+    }
+
+    export function isMappedTypeNode(node: Node): node is MappedTypeNode {
+        return node.kind === SyntaxKind.MappedType;
+    }
+
+    export function isLiteralTypeNode(node: Node): node is LiteralTypeNode {
+        return node.kind === SyntaxKind.LiteralType;
+    }
+
+    // Binding patterns
+
+    export function isObjectBindingPattern(node: Node): node is ObjectBindingPattern {
+        return node.kind === SyntaxKind.ObjectBindingPattern;
+    }
+
+    export function isArrayBindingPattern(node: Node): node is ArrayBindingPattern {
+        return node.kind === SyntaxKind.ArrayBindingPattern;
+    }
+
+    export function isBindingElement(node: Node): node is BindingElement {
+        return node.kind === SyntaxKind.BindingElement;
+    }
+
+    // Expression
+
+    export function isArrayLiteralExpression(node: Node): node is ArrayLiteralExpression {
+        return node.kind === SyntaxKind.ArrayLiteralExpression;
+    }
+
+    export function isObjectLiteralExpression(node: Node): node is ObjectLiteralExpression {
+        return node.kind === SyntaxKind.ObjectLiteralExpression;
+    }
+
+    export function isPropertyAccessExpression(node: Node): node is PropertyAccessExpression {
+        return node.kind === SyntaxKind.PropertyAccessExpression;
+    }
+
+    export function isElementAccessExpression(node: Node): node is ElementAccessExpression {
+        return node.kind === SyntaxKind.ElementAccessExpression;
+    }
+
+    export function isCallExpression(node: Node): node is CallExpression {
+        return node.kind === SyntaxKind.CallExpression;
+    }
+
+    export function isNewExpression(node: Node): node is NewExpression {
+        return node.kind === SyntaxKind.NewExpression;
+    }
+
+    export function isTaggedTemplateExpression(node: Node): node is TaggedTemplateExpression {
+        return node.kind === SyntaxKind.TaggedTemplateExpression;
+    }
+
+    export function isTypeAssertion(node: Node): node is TypeAssertion {
+        return node.kind === SyntaxKind.TypeAssertionExpression;
+    }
+
+    export function isParenthesizedExpression(node: Node): node is ParenthesizedExpression {
+        return node.kind === SyntaxKind.ParenthesizedExpression;
+    }
+
+    export function skipPartiallyEmittedExpressions(node: Expression): Expression;
+    export function skipPartiallyEmittedExpressions(node: Node): Node;
+    export function skipPartiallyEmittedExpressions(node: Node) {
+        while (node.kind === SyntaxKind.PartiallyEmittedExpression) {
+            node = (<PartiallyEmittedExpression>node).expression;
+        }
+
+        return node;
+    }
+
+    export function isFunctionExpression(node: Node): node is FunctionExpression {
+        return node.kind === SyntaxKind.FunctionExpression;
+    }
+
+    export function isArrowFunction(node: Node): node is ArrowFunction {
+        return node.kind === SyntaxKind.ArrowFunction;
+    }
+
+    export function isDeleteExpression(node: Node): node is DeleteExpression {
+        return node.kind === SyntaxKind.DeleteExpression;
+    }
+
+    export function isTypeOfExpression(node: Node): node is TypeOfExpression {
+        return node.kind === SyntaxKind.AwaitExpression;
+    }
+
+    export function isVoidExpression(node: Node): node is VoidExpression {
+        return node.kind === SyntaxKind.VoidExpression;
+    }
+
+    export function isAwaitExpression(node: Node): node is AwaitExpression {
+        return node.kind === SyntaxKind.AwaitExpression;
+    }
+
+    export function isPrefixUnaryExpression(node: Node): node is PrefixUnaryExpression {
+        return node.kind === SyntaxKind.PrefixUnaryExpression;
+    }
+
+    export function isPostfixUnaryExpression(node: Node): node is PostfixUnaryExpression {
+        return node.kind === SyntaxKind.PostfixUnaryExpression;
+    }
+
+    export function isBinaryExpression(node: Node): node is BinaryExpression {
+        return node.kind === SyntaxKind.BinaryExpression;
+    }
+
+    export function isConditionalExpression(node: Node): node is ConditionalExpression {
+        return node.kind === SyntaxKind.ConditionalExpression;
+    }
+
+    export function isTemplateExpression(node: Node): node is TemplateExpression {
+        return node.kind === SyntaxKind.TemplateExpression;
+    }
+
+    export function isYieldExpression(node: Node): node is YieldExpression {
+        return node.kind === SyntaxKind.YieldExpression;
+    }
+
+    export function isSpreadElement(node: Node): node is SpreadElement {
+        return node.kind === SyntaxKind.SpreadElement;
+    }
+
+    export function isClassExpression(node: Node): node is ClassExpression {
+        return node.kind === SyntaxKind.ClassExpression;
+    }
+
+    export function isOmittedExpression(node: Node): node is OmittedExpression {
+        return node.kind === SyntaxKind.OmittedExpression;
+    }
+
+    export function isExpressionWithTypeArguments(node: Node): node is ExpressionWithTypeArguments {
+        return node.kind === SyntaxKind.ExpressionWithTypeArguments;
+    }
+
+    export function isAsExpression(node: Node): node is AsExpression {
+        return node.kind === SyntaxKind.AsExpression;
+    }
+
+    export function isNonNullExpression(node: Node): node is NonNullExpression {
+        return node.kind === SyntaxKind.NonNullExpression;
+    }
+
+    export function isMetaProperty(node: Node): node is MetaProperty {
+        return node.kind === SyntaxKind.MetaProperty;
+    }
+
+    // Misc
+
+    export function isTemplateSpan(node: Node): node is TemplateSpan {
+        return node.kind === SyntaxKind.TemplateSpan;
+    }
+
+    export function isSemicolonClassElement(node: Node): node is SemicolonClassElement {
+        return node.kind === SyntaxKind.SemicolonClassElement;
+    }
+
+    // Block
+
+    export function isBlock(node: Node): node is Block {
+        return node.kind === SyntaxKind.Block;
+    }
+
+    export function isVariableStatement(node: Node): node is VariableStatement {
+        return node.kind === SyntaxKind.VariableStatement;
+    }
+
+    export function isEmptyStatement(node: Node): node is EmptyStatement {
+        return node.kind === SyntaxKind.EmptyStatement;
+    }
+
+    export function isExpressionStatement(node: Node): node is ExpressionStatement {
+        return node.kind === SyntaxKind.ExpressionStatement;
+    }
+
+    export function isIfStatement(node: Node): node is IfStatement {
+        return node.kind === SyntaxKind.IfStatement;
+    }
+
+    export function isDoStatement(node: Node): node is DoStatement {
+        return node.kind === SyntaxKind.DoStatement;
+    }
+
+    export function isWhileStatement(node: Node): node is WhileStatement {
+        return node.kind === SyntaxKind.WhileStatement;
+    }
+
+    export function isForStatement(node: Node): node is ForStatement {
+        return node.kind === SyntaxKind.ForStatement;
+    }
+
+    export function isForInStatement(node: Node): node is ForInStatement {
+        return node.kind === SyntaxKind.ForInStatement;
+    }
+
+    export function isForOfStatement(node: Node): node is ForOfStatement {
+        return node.kind === SyntaxKind.ForOfStatement;
+    }
+
+    export function isContinueStatement(node: Node): node is ContinueStatement {
+        return node.kind === SyntaxKind.ContinueStatement;
+    }
+
+    export function isBreakStatement(node: Node): node is BreakStatement {
+        return node.kind === SyntaxKind.BreakStatement;
+    }
+
+    export function isReturnStatement(node: Node): node is ReturnStatement {
+        return node.kind === SyntaxKind.ReturnStatement;
+    }
+
+    export function isWithStatement(node: Node): node is WithStatement {
+        return node.kind === SyntaxKind.WithStatement;
+    }
+
+    export function isSwitchStatement(node: Node): node is SwitchStatement {
+        return node.kind === SyntaxKind.SwitchStatement;
+    }
+
+    export function isLabeledStatement(node: Node): node is LabeledStatement {
+        return node.kind === SyntaxKind.LabeledStatement;
+    }
+
+    export function isThrowStatement(node: Node): node is ThrowStatement {
+        return node.kind === SyntaxKind.ThrowStatement;
+    }
+
+    export function isTryStatement(node: Node): node is TryStatement {
+        return node.kind === SyntaxKind.TryStatement;
+    }
+
+    export function isDebuggerStatement(node: Node): node is DebuggerStatement {
+        return node.kind === SyntaxKind.DebuggerStatement;
+    }
+
+    export function isVariableDeclaration(node: Node): node is VariableDeclaration {
+        return node.kind === SyntaxKind.VariableDeclaration;
+    }
+
+    export function isVariableDeclarationList(node: Node): node is VariableDeclarationList {
+        return node.kind === SyntaxKind.VariableDeclarationList;
+    }
+
+    export function isFunctionDeclaration(node: Node): node is FunctionDeclaration {
+        return node.kind === SyntaxKind.FunctionDeclaration;
+    }
+
+    export function isClassDeclaration(node: Node): node is ClassDeclaration {
+        return node.kind === SyntaxKind.ClassDeclaration;
+    }
+
+    export function isInterfaceDeclaration(node: Node): node is InterfaceDeclaration {
+        return node.kind === SyntaxKind.InterfaceDeclaration;
+    }
+
+    export function isTypeAliasDeclaration(node: Node): node is TypeAliasDeclaration {
+        return node.kind === SyntaxKind.TypeAliasDeclaration;
+    }
+
+    export function isEnumDeclaration(node: Node): node is EnumDeclaration {
+        return node.kind === SyntaxKind.EnumDeclaration;
+    }
+
+    export function isModuleDeclaration(node: Node): node is ModuleDeclaration {
+        return node.kind === SyntaxKind.ModuleDeclaration;
+    }
+
+    export function isModuleBlock(node: Node): node is ModuleBlock {
+        return node.kind === SyntaxKind.ModuleBlock;
+    }
+
+    export function isCaseBlock(node: Node): node is CaseBlock {
+        return node.kind === SyntaxKind.CaseBlock;
+    }
+
+    export function isNamespaceExportDeclaration(node: Node): node is NamespaceExportDeclaration {
+        return node.kind === SyntaxKind.NamespaceExportDeclaration;
+    }
+
+    export function isImportEqualsDeclaration(node: Node): node is ImportEqualsDeclaration {
+        return node.kind === SyntaxKind.ImportEqualsDeclaration;
+    }
+
+    export function isImportDeclaration(node: Node): node is ImportDeclaration {
+        return node.kind === SyntaxKind.ImportDeclaration;
+    }
+
+    export function isImportClause(node: Node): node is ImportClause {
+        return node.kind === SyntaxKind.ImportClause;
+    }
+
+    export function isNamespaceImport(node: Node): node is NamespaceImport {
+        return node.kind === SyntaxKind.NamespaceImport;
+    }
+
+    export function isNamedImports(node: Node): node is NamedImports {
+        return node.kind === SyntaxKind.NamedImports;
+    }
+
+    export function isImportSpecifier(node: Node): node is ImportSpecifier {
+        return node.kind === SyntaxKind.ImportSpecifier;
+    }
+
+    export function isExportAssignment(node: Node): node is ExportAssignment {
+        return node.kind === SyntaxKind.ExportAssignment;
+    }
+
+    export function isExportDeclaration(node: Node): node is ExportDeclaration {
+        return node.kind === SyntaxKind.ExportDeclaration;
+    }
+
+    export function isNamedExports(node: Node): node is NamedExports {
+        return node.kind === SyntaxKind.NamedExports;
+    }
+
+    export function isExportSpecifier(node: Node): node is ExportSpecifier {
+        return node.kind === SyntaxKind.ExportSpecifier;
+    }
+
+    export function isMissingDeclaration(node: Node): node is MissingDeclaration {
+        return node.kind === SyntaxKind.MissingDeclaration;
+    }
+
+    // Module References
+
+    export function isExternalModuleReference(node: Node): node is ExternalModuleReference {
+        return node.kind === SyntaxKind.ExternalModuleReference;
+    }
+
+    // JSX
+
+    export function isJsxElement(node: Node): node is JsxElement {
+        return node.kind === SyntaxKind.JsxElement;
+    }
+
+    export function isJsxSelfClosingElement(node: Node): node is JsxSelfClosingElement {
+        return node.kind === SyntaxKind.JsxSelfClosingElement;
+    }
+
+    export function isJsxOpeningElement(node: Node): node is JsxOpeningElement {
+        return node.kind === SyntaxKind.JsxOpeningElement;
+    }
+
+    export function isJsxClosingElement(node: Node): node is JsxClosingElement {
+        return node.kind === SyntaxKind.JsxClosingElement;
+    }
+
+    export function isJsxAttribute(node: Node): node is JsxAttribute {
+        return node.kind === SyntaxKind.JsxAttribute;
+    }
+
+    export function isJsxAttributes(node: Node): node is JsxAttributes {
+        return node.kind === SyntaxKind.JsxAttributes;
+    }
+
+    export function isJsxSpreadAttribute(node: Node): node is JsxSpreadAttribute {
+        return node.kind === SyntaxKind.JsxSpreadAttribute;
+    }
+
+    export function isJsxExpression(node: Node): node is JsxExpression {
+        return node.kind === SyntaxKind.JsxExpression;
+    }
+
+    // Clauses
+
+    export function isCaseClause(node: Node): node is CaseClause {
+        return node.kind === SyntaxKind.CaseClause;
+    }
+
+    export function isDefaultClause(node: Node): node is DefaultClause {
+        return node.kind === SyntaxKind.DefaultClause;
+    }
+
+    export function isHeritageClause(node: Node): node is HeritageClause {
+        return node.kind === SyntaxKind.HeritageClause;
+    }
+
+    export function isCatchClause(node: Node): node is CatchClause {
+        return node.kind === SyntaxKind.CatchClause;
+    }
+
+    // Property assignments
+
+    export function isPropertyAssignment(node: Node): node is PropertyAssignment {
+        return node.kind === SyntaxKind.PropertyAssignment;
+    }
+
+    export function isShorthandPropertyAssignment(node: Node): node is ShorthandPropertyAssignment {
+        return node.kind === SyntaxKind.ShorthandPropertyAssignment;
+    }
+
+    export function isSpreadAssignment(node: Node): node is SpreadAssignment {
+        return node.kind === SyntaxKind.SpreadAssignment;
+    }
+
+    // Enum
+
+    export function isEnumMember(node: Node): node is EnumMember {
+        return node.kind === SyntaxKind.EnumMember;
+    }
+
+    // Top-level nodes
+    export function isSourceFile(node: Node): node is SourceFile {
+        return node.kind === SyntaxKind.SourceFile;
+    }
+
+    export function isBundle(node: Node): node is Bundle {
+        return node.kind === SyntaxKind.Bundle;
+    }
+
+    // JSDoc
+
+    export function isJSDocTypeExpression(node: Node): node is JSDocTypeExpression {
+        return node.kind === SyntaxKind.JSDocTypeExpression;
+    }
+
+    export function isJSDocAllType(node: JSDocAllType): node is JSDocAllType {
+        return node.kind === SyntaxKind.JSDocAllType;
+    }
+
+    export function isJSDocUnknownType(node: Node): node is JSDocUnknownType {
+        return node.kind === SyntaxKind.JSDocUnknownType;
+    }
+
+    export function isJSDocArrayType(node: Node): node is JSDocArrayType {
+        return node.kind === SyntaxKind.JSDocArrayType;
+    }
+
+    export function isJSDocUnionType(node: Node): node is JSDocUnionType {
+        return node.kind === SyntaxKind.JSDocUnionType;
+    }
+
+    export function isJSDocTupleType(node: Node): node is JSDocTupleType {
+        return node.kind === SyntaxKind.JSDocTupleType;
+    }
+
+    export function isJSDocNullableType(node: Node): node is JSDocNullableType {
+        return node.kind === SyntaxKind.JSDocNullableType;
+    }
+
+    export function isJSDocNonNullableType(node: Node): node is JSDocNonNullableType {
+        return node.kind === SyntaxKind.JSDocNonNullableType;
+    }
+
+    export function isJSDocRecordType(node: Node): node is JSDocRecordType {
+        return node.kind === SyntaxKind.JSDocRecordType;
+    }
+
+    export function isJSDocRecordMember(node: Node): node is JSDocRecordMember {
+        return node.kind === SyntaxKind.JSDocRecordMember;
+    }
+
+    export function isJSDocTypeReference(node: Node): node is JSDocTypeReference {
+        return node.kind === SyntaxKind.JSDocTypeReference;
+    }
+
+    export function isJSDocOptionalType(node: Node): node is JSDocOptionalType {
+        return node.kind === SyntaxKind.JSDocOptionalType;
+    }
+
+    export function isJSDocFunctionType(node: Node): node is JSDocFunctionType {
+        return node.kind === SyntaxKind.JSDocFunctionType;
+    }
+
+    export function isJSDocVariadicType(node: Node): node is JSDocVariadicType {
+        return node.kind === SyntaxKind.JSDocVariadicType;
+    }
+
+    export function isJSDocConstructorType(node: Node): node is JSDocConstructorType {
+        return node.kind === SyntaxKind.JSDocConstructorType;
+    }
+
+    export function isJSDocThisType(node: Node): node is JSDocThisType {
+        return node.kind === SyntaxKind.JSDocThisType;
+    }
+
+    export function isJSDoc(node: Node): node is JSDoc {
+        return node.kind === SyntaxKind.JSDocComment;
+    }
+
+    export function isJSDocAugmentsTag(node: Node): node is JSDocAugmentsTag {
+        return node.kind === SyntaxKind.JSDocAugmentsTag;
+    }
+
+    export function isJSDocParameterTag(node: Node): node is JSDocParameterTag {
+        return node.kind === SyntaxKind.JSDocParameterTag;
+    }
+
+    export function isJSDocReturnTag(node: Node): node is JSDocReturnTag {
+        return node.kind === SyntaxKind.JSDocReturnTag;
+    }
+
+    export function isJSDocTypeTag(node: Node): node is JSDocTypeTag {
+        return node.kind === SyntaxKind.JSDocTypeTag;
+    }
+
+    export function isJSDocTemplateTag(node: Node): node is JSDocTemplateTag {
+        return node.kind === SyntaxKind.JSDocTemplateTag;
+    }
+
+    export function isJSDocTypedefTag(node: Node): node is JSDocTypedefTag {
+        return node.kind === SyntaxKind.JSDocTypedefTag;
+    }
+
+    export function isJSDocPropertyTag(node: Node): node is JSDocPropertyTag {
+        return node.kind === SyntaxKind.JSDocPropertyTag;
+    }
+
+    export function isJSDocTypeLiteral(node: Node): node is JSDocTypeLiteral {
+        return node.kind === SyntaxKind.JSDocTypeLiteral;
+    }
+
+    export function isJSDocLiteralType(node: Node): node is JSDocLiteralType {
+        return node.kind === SyntaxKind.JSDocLiteralType;
+    }
+}
+
+// Node tests
+//
+// All node tests in the following list should *not* reference parent pointers so that
+// they may be used with transformations.
+namespace ts {
+    /* @internal */
+    export function isNode(node: Node) {
+        return isNodeKind(node.kind);
+    }
+
+    /* @internal */
+    export function isNodeKind(kind: SyntaxKind) {
+        return kind >= SyntaxKind.FirstNode;
+    }
+
+    /**
+     * True if node is of some token syntax kind.
+     * For example, this is true for an IfKeyword but not for an IfStatement.
+     */
+    export function isToken(n: Node): boolean {
+        return n.kind >= SyntaxKind.FirstToken && n.kind <= SyntaxKind.LastToken;
+    }
+
+    // Node Arrays
+
+    /* @internal */
+    export function isNodeArray<T extends Node>(array: T[]): array is NodeArray<T> {
+        return array.hasOwnProperty("pos")
+            && array.hasOwnProperty("end");
+    }
+
+    // Literals
+
+    /* @internal */
+    export function isLiteralKind(kind: SyntaxKind): boolean {
+        return SyntaxKind.FirstLiteralToken <= kind && kind <= SyntaxKind.LastLiteralToken;
+    }
+
+    export function isLiteralExpression(node: Node): node is LiteralExpression {
+        return isLiteralKind(node.kind);
+    }
+
+    // Pseudo-literals
+
+    /* @internal */
+    export function isTemplateLiteralKind(kind: SyntaxKind): boolean {
+        return SyntaxKind.FirstTemplateToken <= kind && kind <= SyntaxKind.LastTemplateToken;
+    }
+
+    export function isTemplateMiddleOrTemplateTail(node: Node): node is TemplateMiddle | TemplateTail {
+        const kind = node.kind;
+        return kind === SyntaxKind.TemplateMiddle
+            || kind === SyntaxKind.TemplateTail;
+    }
+
+    // Identifiers
+
+    /* @internal */
+    export function isGeneratedIdentifier(node: Node): node is GeneratedIdentifier {
+        // Using `>` here catches both `GeneratedIdentifierKind.None` and `undefined`.
+        return isIdentifier(node) && node.autoGenerateKind > GeneratedIdentifierKind.None;
+    }
+
+    // Keywords
+
+    /* @internal */
+    export function isModifierKind(token: SyntaxKind): boolean {
+        switch (token) {
+            case SyntaxKind.AbstractKeyword:
+            case SyntaxKind.AsyncKeyword:
+            case SyntaxKind.ConstKeyword:
+            case SyntaxKind.DeclareKeyword:
+            case SyntaxKind.DefaultKeyword:
+            case SyntaxKind.ExportKeyword:
+            case SyntaxKind.PublicKeyword:
+            case SyntaxKind.PrivateKeyword:
+            case SyntaxKind.ProtectedKeyword:
+            case SyntaxKind.ReadonlyKeyword:
+            case SyntaxKind.StaticKeyword:
+                return true;
+        }
+        return false;
+    }
+
+    export function isModifier(node: Node): node is Modifier {
+        return isModifierKind(node.kind);
+    }
+
+    export function isEntityName(node: Node): node is EntityName {
+        const kind = node.kind;
+        return kind === SyntaxKind.QualifiedName
+            || kind === SyntaxKind.Identifier;
+    }
+
+    export function isPropertyName(node: Node): node is PropertyName {
+        const kind = node.kind;
+        return kind === SyntaxKind.Identifier
+            || kind === SyntaxKind.StringLiteral
+            || kind === SyntaxKind.NumericLiteral
+            || kind === SyntaxKind.ComputedPropertyName;
+    }
+
+    export function isBindingName(node: Node): node is BindingName {
+        const kind = node.kind;
+        return kind === SyntaxKind.Identifier
+            || kind === SyntaxKind.ObjectBindingPattern
+            || kind === SyntaxKind.ArrayBindingPattern;
+    }
+
+    // Functions
+
+    export function isFunctionLike(node: Node): node is FunctionLikeDeclaration {
+        return node && isFunctionLikeKind(node.kind);
+    }
+
+    /* @internal */
+    export function isFunctionLikeKind(kind: SyntaxKind): boolean {
+        switch (kind) {
+            case SyntaxKind.Constructor:
+            case SyntaxKind.FunctionExpression:
+            case SyntaxKind.FunctionDeclaration:
+            case SyntaxKind.ArrowFunction:
+            case SyntaxKind.MethodDeclaration:
+            case SyntaxKind.MethodSignature:
+            case SyntaxKind.GetAccessor:
+            case SyntaxKind.SetAccessor:
+            case SyntaxKind.CallSignature:
+            case SyntaxKind.ConstructSignature:
+            case SyntaxKind.IndexSignature:
+            case SyntaxKind.FunctionType:
+            case SyntaxKind.ConstructorType:
+                return true;
+        }
+
+        return false;
+    }
+
+    // Classes
+    export function isClassElement(node: Node): node is ClassElement {
+        const kind = node.kind;
+        return kind === SyntaxKind.Constructor
             || kind === SyntaxKind.PropertyDeclaration
             || kind === SyntaxKind.MethodDeclaration
             || kind === SyntaxKind.GetAccessor
             || kind === SyntaxKind.SetAccessor
             || kind === SyntaxKind.IndexSignature
-            || kind === SyntaxKind.SemicolonClassElement;
+            || kind === SyntaxKind.SemicolonClassElement
+            || kind === SyntaxKind.MissingDeclaration;
+    }
+
+    export function isClassLike(node: Node): node is ClassLikeDeclaration {
+        return node && (node.kind === SyntaxKind.ClassDeclaration || node.kind === SyntaxKind.ClassExpression);
+    }
+
+    export function isAccessor(node: Node): node is AccessorDeclaration {
+        return node && (node.kind === SyntaxKind.GetAccessor || node.kind === SyntaxKind.SetAccessor);
+    }
+
+    // Type members
+
+    export function isTypeElement(node: Node): node is TypeElement {
+        const kind = node.kind;
+        return kind === SyntaxKind.ConstructSignature
+            || kind === SyntaxKind.CallSignature
+            || kind === SyntaxKind.PropertySignature
+            || kind === SyntaxKind.MethodSignature
+            || kind === SyntaxKind.IndexSignature
+            || kind === SyntaxKind.MissingDeclaration;
     }
 
     export function isObjectLiteralElementLike(node: Node): node is ObjectLiteralElementLike {
         const kind = node.kind;
         return kind === SyntaxKind.PropertyAssignment
             || kind === SyntaxKind.ShorthandPropertyAssignment
+            || kind === SyntaxKind.SpreadAssignment
             || kind === SyntaxKind.MethodDeclaration
             || kind === SyntaxKind.GetAccessor
             || kind === SyntaxKind.SetAccessor
@@ -3716,10 +4870,14 @@ namespace ts {
         return (kind >= SyntaxKind.FirstTypeNode && kind <= SyntaxKind.LastTypeNode)
             || kind === SyntaxKind.AnyKeyword
             || kind === SyntaxKind.NumberKeyword
+            || kind === SyntaxKind.ObjectKeyword
             || kind === SyntaxKind.BooleanKeyword
             || kind === SyntaxKind.StringKeyword
             || kind === SyntaxKind.SymbolKeyword
+            || kind === SyntaxKind.ThisKeyword
             || kind === SyntaxKind.VoidKeyword
+            || kind === SyntaxKind.UndefinedKeyword
+            || kind === SyntaxKind.NullKeyword
             || kind === SyntaxKind.NeverKeyword
             || kind === SyntaxKind.ExpressionWithTypeArguments;
     }
@@ -3733,8 +4891,19 @@ namespace ts {
         return isTypeNodeKind(node.kind);
     }
 
+    export function isFunctionOrConstructorTypeNode(node: Node): node is FunctionTypeNode | ConstructorTypeNode {
+        switch (node.kind) {
+            case SyntaxKind.FunctionType:
+            case SyntaxKind.ConstructorType:
+                return true;
+        }
+
+        return false;
+    }
+
     // Binding patterns
 
+    /* @internal */
     export function isBindingPattern(node: Node): node is BindingPattern {
         if (node) {
             const kind = node.kind;
@@ -3745,50 +4914,104 @@ namespace ts {
         return false;
     }
 
-    export function isBindingElement(node: Node): node is BindingElement {
-        return node.kind === SyntaxKind.BindingElement;
+    /* @internal */
+    export function isAssignmentPattern(node: Node): node is AssignmentPattern {
+        const kind = node.kind;
+        return kind === SyntaxKind.ArrayLiteralExpression
+            || kind === SyntaxKind.ObjectLiteralExpression;
     }
 
+
+    /* @internal */
     export function isArrayBindingElement(node: Node): node is ArrayBindingElement {
         const kind = node.kind;
         return kind === SyntaxKind.BindingElement
             || kind === SyntaxKind.OmittedExpression;
     }
 
-    // Expression
 
-    export function isPropertyAccessExpression(node: Node): node is PropertyAccessExpression {
-        return node.kind === SyntaxKind.PropertyAccessExpression;
-    }
+    /**
+     * Determines whether the BindingOrAssignmentElement is a BindingElement-like declaration
+     */
+    /* @internal */
+    export function isDeclarationBindingElement(bindingElement: BindingOrAssignmentElement): bindingElement is VariableDeclaration | ParameterDeclaration | BindingElement {
+        switch (bindingElement.kind) {
+            case SyntaxKind.VariableDeclaration:
+            case SyntaxKind.Parameter:
+            case SyntaxKind.BindingElement:
+                return true;
+        }
 
-    export function isElementAccessExpression(node: Node): node is ElementAccessExpression {
-        return node.kind === SyntaxKind.ElementAccessExpression;
+        return false;
     }
 
-    export function isBinaryExpression(node: Node): node is BinaryExpression {
-        return node.kind === SyntaxKind.BinaryExpression;
+    /**
+     * Determines whether a node is a BindingOrAssignmentPattern
+     */
+    /* @internal */
+    export function isBindingOrAssignmentPattern(node: BindingOrAssignmentElementTarget): node is BindingOrAssignmentPattern {
+        return isObjectBindingOrAssignmentPattern(node)
+            || isArrayBindingOrAssignmentPattern(node);
     }
 
-    export function isConditionalExpression(node: Node): node is ConditionalExpression {
-        return node.kind === SyntaxKind.ConditionalExpression;
+    /**
+     * Determines whether a node is an ObjectBindingOrAssignmentPattern
+     */
+    /* @internal */
+    export function isObjectBindingOrAssignmentPattern(node: BindingOrAssignmentElementTarget): node is ObjectBindingOrAssignmentPattern {
+        switch (node.kind) {
+            case SyntaxKind.ObjectBindingPattern:
+            case SyntaxKind.ObjectLiteralExpression:
+                return true;
+        }
+
+        return false;
     }
 
-    export function isCallExpression(node: Node): node is CallExpression {
-        return node.kind === SyntaxKind.CallExpression;
+    /**
+     * Determines whether a node is an ArrayBindingOrAssignmentPattern
+     */
+    /* @internal */
+    export function isArrayBindingOrAssignmentPattern(node: BindingOrAssignmentElementTarget): node is ArrayBindingOrAssignmentPattern {
+        switch (node.kind) {
+            case SyntaxKind.ArrayBindingPattern:
+            case SyntaxKind.ArrayLiteralExpression:
+                return true;
+        }
+
+        return false;
     }
 
-    export function isTemplate(node: Node): node is Template {
+    // Expression
+
+    export function isPropertyAccessOrQualifiedName(node: Node): node is PropertyAccessExpression | QualifiedName {
         const kind = node.kind;
-        return kind === SyntaxKind.TemplateExpression
-            || kind === SyntaxKind.NoSubstitutionTemplateLiteral;
+        return kind === SyntaxKind.PropertyAccessExpression
+            || kind === SyntaxKind.QualifiedName;
+    }
+
+    export function isCallLikeExpression(node: Node): node is CallLikeExpression {
+        switch (node.kind) {
+            case SyntaxKind.JsxOpeningElement:
+            case SyntaxKind.JsxSelfClosingElement:
+            case SyntaxKind.CallExpression:
+            case SyntaxKind.NewExpression:
+            case SyntaxKind.TaggedTemplateExpression:
+            case SyntaxKind.Decorator:
+                return true;
+            default:
+                return false;
+        }
     }
 
-    export function isSpreadElementExpression(node: Node): node is SpreadElementExpression {
-        return node.kind === SyntaxKind.SpreadElementExpression;
+    export function isCallOrNewExpression(node: Node): node is CallExpression | NewExpression {
+        return node.kind === SyntaxKind.CallExpression || node.kind === SyntaxKind.NewExpression;
     }
 
-    export function isExpressionWithTypeArguments(node: Node): node is ExpressionWithTypeArguments {
-        return node.kind === SyntaxKind.ExpressionWithTypeArguments;
+    export function isTemplateLiteral(node: Node): node is TemplateLiteral {
+        const kind = node.kind;
+        return kind === SyntaxKind.TemplateExpression
+            || kind === SyntaxKind.NoSubstitutionTemplateLiteral;
     }
 
     function isLeftHandSideExpressionKind(kind: SyntaxKind): boolean {
@@ -3815,9 +5038,11 @@ namespace ts {
             || kind === SyntaxKind.ThisKeyword
             || kind === SyntaxKind.TrueKeyword
             || kind === SyntaxKind.SuperKeyword
-            || kind === SyntaxKind.NonNullExpression;
+            || kind === SyntaxKind.NonNullExpression
+            || kind === SyntaxKind.MetaProperty;
     }
 
+    /* @internal */
     export function isLeftHandSideExpression(node: Node): node is LeftHandSideExpression {
         return isLeftHandSideExpressionKind(skipPartiallyEmittedExpressions(node).kind);
     }
@@ -3833,6 +5058,7 @@ namespace ts {
             || isLeftHandSideExpressionKind(kind);
     }
 
+    /* @internal */
     export function isUnaryExpression(node: Node): node is UnaryExpression {
         return isUnaryExpressionKind(skipPartiallyEmittedExpressions(node).kind);
     }
@@ -3842,12 +5068,14 @@ namespace ts {
             || kind === SyntaxKind.YieldExpression
             || kind === SyntaxKind.ArrowFunction
             || kind === SyntaxKind.BinaryExpression
-            || kind === SyntaxKind.SpreadElementExpression
+            || kind === SyntaxKind.SpreadElement
             || kind === SyntaxKind.AsExpression
             || kind === SyntaxKind.OmittedExpression
+            || kind === SyntaxKind.CommaListExpression
             || isUnaryExpressionKind(kind);
     }
 
+    /* @internal */
     export function isExpression(node: Node): node is Expression {
         return isExpressionKind(skipPartiallyEmittedExpressions(node).kind);
     }
@@ -3858,93 +5086,93 @@ namespace ts {
             || kind === SyntaxKind.AsExpression;
     }
 
+    /* @internal */
     export function isPartiallyEmittedExpression(node: Node): node is PartiallyEmittedExpression {
         return node.kind === SyntaxKind.PartiallyEmittedExpression;
     }
 
+    /* @internal */
     export function isNotEmittedStatement(node: Node): node is NotEmittedStatement {
         return node.kind === SyntaxKind.NotEmittedStatement;
     }
 
+    /* @internal */
     export function isNotEmittedOrPartiallyEmittedNode(node: Node): node is NotEmittedStatement | PartiallyEmittedExpression {
         return isNotEmittedStatement(node)
             || isPartiallyEmittedExpression(node);
     }
 
-    export function isOmittedExpression(node: Node): node is OmittedExpression {
-        return node.kind === SyntaxKind.OmittedExpression;
-    }
+    // Statement
 
-    // Misc
+    export function isIterationStatement(node: Node, lookInLabeledStatements: boolean): node is IterationStatement {
+        switch (node.kind) {
+            case SyntaxKind.ForStatement:
+            case SyntaxKind.ForInStatement:
+            case SyntaxKind.ForOfStatement:
+            case SyntaxKind.DoStatement:
+            case SyntaxKind.WhileStatement:
+                return true;
+            case SyntaxKind.LabeledStatement:
+                return lookInLabeledStatements && isIterationStatement((<LabeledStatement>node).statement, lookInLabeledStatements);
+        }
 
-    export function isTemplateSpan(node: Node): node is TemplateSpan {
-        return node.kind === SyntaxKind.TemplateSpan;
+        return false;
     }
 
-    // Element
-
-    export function isBlock(node: Node): node is Block {
-        return node.kind === SyntaxKind.Block;
+    /* @internal */
+    export function isForInOrOfStatement(node: Node): node is ForInOrOfStatement {
+        return node.kind === SyntaxKind.ForInStatement || node.kind === SyntaxKind.ForOfStatement;
     }
 
+    // Element
+
+    /* @internal */
     export function isConciseBody(node: Node): node is ConciseBody {
         return isBlock(node)
             || isExpression(node);
     }
 
+    /* @internal */
     export function isFunctionBody(node: Node): node is FunctionBody {
         return isBlock(node);
     }
 
+    /* @internal */
     export function isForInitializer(node: Node): node is ForInitializer {
-        return isVariableDeclarationList(node)
-            || isExpression(node);
-    }
-
-    export function isVariableDeclaration(node: Node): node is VariableDeclaration {
-        return node.kind === SyntaxKind.VariableDeclaration;
-    }
-
-    export function isVariableDeclarationList(node: Node): node is VariableDeclarationList {
-        return node.kind === SyntaxKind.VariableDeclarationList;
-    }
-
-    export function isCaseBlock(node: Node): node is CaseBlock {
-        return node.kind === SyntaxKind.CaseBlock;
+        return isVariableDeclarationList(node)
+            || isExpression(node);
     }
 
+    /* @internal */
     export function isModuleBody(node: Node): node is ModuleBody {
         const kind = node.kind;
         return kind === SyntaxKind.ModuleBlock
-            || kind === SyntaxKind.ModuleDeclaration;
+            || kind === SyntaxKind.ModuleDeclaration
+            || kind === SyntaxKind.Identifier;
     }
 
-    export function isImportEqualsDeclaration(node: Node): node is ImportEqualsDeclaration {
-        return node.kind === SyntaxKind.ImportEqualsDeclaration;
+    /* @internal */
+    export function isNamespaceBody(node: Node): node is NamespaceBody {
+        const kind = node.kind;
+        return kind === SyntaxKind.ModuleBlock
+            || kind === SyntaxKind.ModuleDeclaration;
     }
 
-    export function isImportClause(node: Node): node is ImportClause {
-        return node.kind === SyntaxKind.ImportClause;
+    /* @internal */
+    export function isJSDocNamespaceBody(node: Node): node is JSDocNamespaceBody {
+        const kind = node.kind;
+        return kind === SyntaxKind.Identifier
+            || kind === SyntaxKind.ModuleDeclaration;
     }
 
+    /* @internal */
     export function isNamedImportBindings(node: Node): node is NamedImportBindings {
         const kind = node.kind;
         return kind === SyntaxKind.NamedImports
             || kind === SyntaxKind.NamespaceImport;
     }
 
-    export function isImportSpecifier(node: Node): node is ImportSpecifier {
-        return node.kind === SyntaxKind.ImportSpecifier;
-    }
-
-    export function isNamedExports(node: Node): node is NamedExports {
-        return node.kind === SyntaxKind.NamedExports;
-    }
-
-    export function isExportSpecifier(node: Node): node is ExportSpecifier {
-        return node.kind === SyntaxKind.ExportSpecifier;
-    }
-
+    /* @internal */
     export function isModuleOrEnumDeclaration(node: Node): node is ModuleDeclaration | EnumDeclaration {
         return node.kind === SyntaxKind.ModuleDeclaration || node.kind === SyntaxKind.EnumDeclaration;
     }
@@ -3965,6 +5193,7 @@ namespace ts {
             || kind === SyntaxKind.ImportEqualsDeclaration
             || kind === SyntaxKind.ImportSpecifier
             || kind === SyntaxKind.InterfaceDeclaration
+            || kind === SyntaxKind.JsxAttribute
             || kind === SyntaxKind.MethodDeclaration
             || kind === SyntaxKind.MethodSignature
             || kind === SyntaxKind.ModuleDeclaration
@@ -3994,438 +5223,136 @@ namespace ts {
             || kind === SyntaxKind.ImportEqualsDeclaration
             || kind === SyntaxKind.ExportDeclaration
             || kind === SyntaxKind.ExportAssignment
-            || kind === SyntaxKind.NamespaceExportDeclaration;
-    }
-
-    function isStatementKindButNotDeclarationKind(kind: SyntaxKind) {
-        return kind === SyntaxKind.BreakStatement
-            || kind === SyntaxKind.ContinueStatement
-            || kind === SyntaxKind.DebuggerStatement
-            || kind === SyntaxKind.DoStatement
-            || kind === SyntaxKind.ExpressionStatement
-            || kind === SyntaxKind.EmptyStatement
-            || kind === SyntaxKind.ForInStatement
-            || kind === SyntaxKind.ForOfStatement
-            || kind === SyntaxKind.ForStatement
-            || kind === SyntaxKind.IfStatement
-            || kind === SyntaxKind.LabeledStatement
-            || kind === SyntaxKind.ReturnStatement
-            || kind === SyntaxKind.SwitchStatement
-            || kind === SyntaxKind.ThrowStatement
-            || kind === SyntaxKind.TryStatement
-            || kind === SyntaxKind.VariableStatement
-            || kind === SyntaxKind.WhileStatement
-            || kind === SyntaxKind.WithStatement
-            || kind === SyntaxKind.NotEmittedStatement;
-    }
-
-    export function isDeclaration(node: Node): node is Declaration {
-        return isDeclarationKind(node.kind);
-    }
-
-    export function isDeclarationStatement(node: Node): node is DeclarationStatement {
-        return isDeclarationStatementKind(node.kind);
-    }
-
-    /**
-     * Determines whether the node is a statement that is not also a declaration
-     */
-    export function isStatementButNotDeclaration(node: Node): node is Statement {
-        return isStatementKindButNotDeclarationKind(node.kind);
-    }
-
-    export function isStatement(node: Node): node is Statement {
-        const kind = node.kind;
-        return isStatementKindButNotDeclarationKind(kind)
-            || isDeclarationStatementKind(kind)
-            || kind === SyntaxKind.Block;
-    }
-
-    // Module references
-
-    export function isModuleReference(node: Node): node is ModuleReference {
-        const kind = node.kind;
-        return kind === SyntaxKind.ExternalModuleReference
-            || kind === SyntaxKind.QualifiedName
-            || kind === SyntaxKind.Identifier;
-    }
-
-    // JSX
-
-    export function isJsxOpeningElement(node: Node): node is JsxOpeningElement {
-        return node.kind === SyntaxKind.JsxOpeningElement;
-    }
-
-    export function isJsxClosingElement(node: Node): node is JsxClosingElement {
-        return node.kind === SyntaxKind.JsxClosingElement;
-    }
-
-    export function isJsxTagNameExpression(node: Node): node is JsxTagNameExpression {
-        const kind = node.kind;
-        return kind === SyntaxKind.ThisKeyword
-            || kind === SyntaxKind.Identifier
-            || kind === SyntaxKind.PropertyAccessExpression;
-    }
-
-    export function isJsxChild(node: Node): node is JsxChild {
-        const kind = node.kind;
-        return kind === SyntaxKind.JsxElement
-            || kind === SyntaxKind.JsxExpression
-            || kind === SyntaxKind.JsxSelfClosingElement
-            || kind === SyntaxKind.JsxText;
-    }
-
-    export function isJsxAttributeLike(node: Node): node is JsxAttributeLike {
-        const kind = node.kind;
-        return kind === SyntaxKind.JsxAttribute
-            || kind === SyntaxKind.JsxSpreadAttribute;
-    }
-
-    export function isJsxSpreadAttribute(node: Node): node is JsxSpreadAttribute {
-        return node.kind === SyntaxKind.JsxSpreadAttribute;
-    }
-
-    export function isJsxAttribute(node: Node): node is JsxAttribute {
-        return node.kind === SyntaxKind.JsxAttribute;
-    }
-
-    export function isStringLiteralOrJsxExpression(node: Node): node is StringLiteral | JsxExpression {
-        const kind = node.kind;
-        return kind === SyntaxKind.StringLiteral
-            || kind === SyntaxKind.JsxExpression;
-    }
-
-    // Clauses
-
-    export function isCaseOrDefaultClause(node: Node): node is CaseOrDefaultClause {
-        const kind = node.kind;
-        return kind === SyntaxKind.CaseClause
-            || kind === SyntaxKind.DefaultClause;
-    }
-
-    export function isHeritageClause(node: Node): node is HeritageClause {
-        return node.kind === SyntaxKind.HeritageClause;
-    }
-
-    export function isCatchClause(node: Node): node is CatchClause {
-        return node.kind === SyntaxKind.CatchClause;
-    }
-
-
-    // Property assignments
-
-    export function isPropertyAssignment(node: Node): node is PropertyAssignment {
-        return node.kind === SyntaxKind.PropertyAssignment;
-    }
-
-    export function isShorthandPropertyAssignment(node: Node): node is ShorthandPropertyAssignment {
-        return node.kind === SyntaxKind.ShorthandPropertyAssignment;
-    }
-
-    // Enum
-
-    export function isEnumMember(node: Node): node is EnumMember {
-        return node.kind === SyntaxKind.EnumMember;
-    }
-
-    // Top-level nodes
-    export function isSourceFile(node: Node): node is SourceFile {
-        return node.kind === SyntaxKind.SourceFile;
-    }
-
-    export function isWatchSet(options: CompilerOptions) {
-        // Firefox has Object.prototype.watch
-        return options.watch && options.hasOwnProperty("watch");
-    }
-}
-
-namespace ts {
-    export function getDefaultLibFileName(options: CompilerOptions): string {
-        return options.target === ScriptTarget.ES6 ? "lib.es6.d.ts" : "lib.d.ts";
-    }
-
-    export function textSpanEnd(span: TextSpan) {
-        return span.start + span.length;
-    }
-
-    export function textSpanIsEmpty(span: TextSpan) {
-        return span.length === 0;
-    }
-
-    export function textSpanContainsPosition(span: TextSpan, position: number) {
-        return position >= span.start && position < textSpanEnd(span);
-    }
-
-    // Returns true if 'span' contains 'other'.
-    export function textSpanContainsTextSpan(span: TextSpan, other: TextSpan) {
-        return other.start >= span.start && textSpanEnd(other) <= textSpanEnd(span);
-    }
-
-    export function textSpanOverlapsWith(span: TextSpan, other: TextSpan) {
-        const overlapStart = Math.max(span.start, other.start);
-        const overlapEnd = Math.min(textSpanEnd(span), textSpanEnd(other));
-        return overlapStart < overlapEnd;
-    }
-
-    export function textSpanOverlap(span1: TextSpan, span2: TextSpan) {
-        const overlapStart = Math.max(span1.start, span2.start);
-        const overlapEnd = Math.min(textSpanEnd(span1), textSpanEnd(span2));
-        if (overlapStart < overlapEnd) {
-            return createTextSpanFromBounds(overlapStart, overlapEnd);
-        }
-        return undefined;
-    }
-
-    export function textSpanIntersectsWithTextSpan(span: TextSpan, other: TextSpan) {
-        return other.start <= textSpanEnd(span) && textSpanEnd(other) >= span.start;
-    }
-
-    export function textSpanIntersectsWith(span: TextSpan, start: number, length: number) {
-        const end = start + length;
-        return start <= textSpanEnd(span) && end >= span.start;
-    }
-
-    export function decodedTextSpanIntersectsWith(start1: number, length1: number, start2: number, length2: number) {
-        const end1 = start1 + length1;
-        const end2 = start2 + length2;
-        return start2 <= end1 && end2 >= start1;
-    }
-
-    export function textSpanIntersectsWithPosition(span: TextSpan, position: number) {
-        return position <= textSpanEnd(span) && position >= span.start;
-    }
-
-    export function textSpanIntersection(span1: TextSpan, span2: TextSpan) {
-        const intersectStart = Math.max(span1.start, span2.start);
-        const intersectEnd = Math.min(textSpanEnd(span1), textSpanEnd(span2));
-        if (intersectStart <= intersectEnd) {
-            return createTextSpanFromBounds(intersectStart, intersectEnd);
-        }
-        return undefined;
-    }
-
-    export function createTextSpan(start: number, length: number): TextSpan {
-        if (start < 0) {
-            throw new Error("start < 0");
-        }
-        if (length < 0) {
-            throw new Error("length < 0");
-        }
-
-        return { start, length };
-    }
-
-    export function createTextSpanFromBounds(start: number, end: number) {
-        return createTextSpan(start, end - start);
-    }
-
-    export function textChangeRangeNewSpan(range: TextChangeRange) {
-        return createTextSpan(range.span.start, range.newLength);
+            || kind === SyntaxKind.NamespaceExportDeclaration;
     }
 
-    export function textChangeRangeIsUnchanged(range: TextChangeRange) {
-        return textSpanIsEmpty(range.span) && range.newLength === 0;
+    function isStatementKindButNotDeclarationKind(kind: SyntaxKind) {
+        return kind === SyntaxKind.BreakStatement
+            || kind === SyntaxKind.ContinueStatement
+            || kind === SyntaxKind.DebuggerStatement
+            || kind === SyntaxKind.DoStatement
+            || kind === SyntaxKind.ExpressionStatement
+            || kind === SyntaxKind.EmptyStatement
+            || kind === SyntaxKind.ForInStatement
+            || kind === SyntaxKind.ForOfStatement
+            || kind === SyntaxKind.ForStatement
+            || kind === SyntaxKind.IfStatement
+            || kind === SyntaxKind.LabeledStatement
+            || kind === SyntaxKind.ReturnStatement
+            || kind === SyntaxKind.SwitchStatement
+            || kind === SyntaxKind.ThrowStatement
+            || kind === SyntaxKind.TryStatement
+            || kind === SyntaxKind.VariableStatement
+            || kind === SyntaxKind.WhileStatement
+            || kind === SyntaxKind.WithStatement
+            || kind === SyntaxKind.NotEmittedStatement
+            || kind === SyntaxKind.EndOfDeclarationMarker
+            || kind === SyntaxKind.MergeDeclarationMarker;
     }
 
-    export function createTextChangeRange(span: TextSpan, newLength: number): TextChangeRange {
-        if (newLength < 0) {
-            throw new Error("newLength < 0");
+    /* @internal */
+    export function isDeclaration(node: Node): node is NamedDeclaration {
+        if (node.kind === SyntaxKind.TypeParameter) {
+            return node.parent.kind !== SyntaxKind.JSDocTemplateTag || isInJavaScriptFile(node);
         }
 
-        return { span, newLength };
+        return isDeclarationKind(node.kind);
     }
 
-    export let unchangedTextChangeRange = createTextChangeRange(createTextSpan(0, 0), 0);
+    /* @internal */
+    export function isDeclarationStatement(node: Node): node is DeclarationStatement {
+        return isDeclarationStatementKind(node.kind);
+    }
 
     /**
-     * Called to merge all the changes that occurred across several versions of a script snapshot
-     * into a single change.  i.e. if a user keeps making successive edits to a script we will
-     * have a text change from V1 to V2, V2 to V3, ..., Vn.
-     *
-     * This function will then merge those changes into a single change range valid between V1 and
-     * Vn.
+     * Determines whether the node is a statement that is not also a declaration
      */
-    export function collapseTextChangeRangesAcrossMultipleVersions(changes: TextChangeRange[]): TextChangeRange {
-        if (changes.length === 0) {
-            return unchangedTextChangeRange;
-        }
-
-        if (changes.length === 1) {
-            return changes[0];
-        }
-
-        // We change from talking about { { oldStart, oldLength }, newLength } to { oldStart, oldEnd, newEnd }
-        // as it makes things much easier to reason about.
-        const change0 = changes[0];
-
-        let oldStartN = change0.span.start;
-        let oldEndN = textSpanEnd(change0.span);
-        let newEndN = oldStartN + change0.newLength;
-
-        for (let i = 1; i < changes.length; i++) {
-            const nextChange = changes[i];
+    /* @internal */
+    export function isStatementButNotDeclaration(node: Node): node is Statement {
+        return isStatementKindButNotDeclarationKind(node.kind);
+    }
 
-            // Consider the following case:
-            // i.e. two edits.  The first represents the text change range { { 10, 50 }, 30 }.  i.e. The span starting
-            // at 10, with length 50 is reduced to length 30.  The second represents the text change range { { 30, 30 }, 40 }.
-            // i.e. the span starting at 30 with length 30 is increased to length 40.
-            //
-            //      0         10        20        30        40        50        60        70        80        90        100
-            //      -------------------------------------------------------------------------------------------------------
-            //                |                                                 /
-            //                |                                            /----
-            //  T1            |                                       /----
-            //                |                                  /----
-            //                |                             /----
-            //      -------------------------------------------------------------------------------------------------------
-            //                                     |                            \
-            //                                     |                               \
-            //   T2                                |                                 \
-            //                                     |                                   \
-            //                                     |                                      \
-            //      -------------------------------------------------------------------------------------------------------
-            //
-            // Merging these turns out to not be too difficult.  First, determining the new start of the change is trivial
-            // it's just the min of the old and new starts.  i.e.:
-            //
-            //      0         10        20        30        40        50        60        70        80        90        100
-            //      ------------------------------------------------------------*------------------------------------------
-            //                |                                                 /
-            //                |                                            /----
-            //  T1            |                                       /----
-            //                |                                  /----
-            //                |                             /----
-            //      ----------------------------------------$-------------------$------------------------------------------
-            //                .                    |                            \
-            //                .                    |                               \
-            //   T2           .                    |                                 \
-            //                .                    |                                   \
-            //                .                    |                                      \
-            //      ----------------------------------------------------------------------*--------------------------------
-            //
-            // (Note the dots represent the newly inferred start.
-            // Determining the new and old end is also pretty simple.  Basically it boils down to paying attention to the
-            // absolute positions at the asterisks, and the relative change between the dollar signs. Basically, we see
-            // which if the two $'s precedes the other, and we move that one forward until they line up.  in this case that
-            // means:
-            //
-            //      0         10        20        30        40        50        60        70        80        90        100
-            //      --------------------------------------------------------------------------------*----------------------
-            //                |                                                                     /
-            //                |                                                                /----
-            //  T1            |                                                           /----
-            //                |                                                      /----
-            //                |                                                 /----
-            //      ------------------------------------------------------------$------------------------------------------
-            //                .                    |                            \
-            //                .                    |                               \
-            //   T2           .                    |                                 \
-            //                .                    |                                   \
-            //                .                    |                                      \
-            //      ----------------------------------------------------------------------*--------------------------------
-            //
-            // In other words (in this case), we're recognizing that the second edit happened after where the first edit
-            // ended with a delta of 20 characters (60 - 40).  Thus, if we go back in time to where the first edit started
-            // that's the same as if we started at char 80 instead of 60.
-            //
-            // As it so happens, the same logic applies if the second edit precedes the first edit.  In that case rather
-            // than pushing the first edit forward to match the second, we'll push the second edit forward to match the
-            // first.
-            //
-            // In this case that means we have { oldStart: 10, oldEnd: 80, newEnd: 70 } or, in TextChangeRange
-            // semantics: { { start: 10, length: 70 }, newLength: 60 }
-            //
-            // The math then works out as follows.
-            // If we have { oldStart1, oldEnd1, newEnd1 } and { oldStart2, oldEnd2, newEnd2 } then we can compute the
-            // final result like so:
-            //
-            // {
-            //      oldStart3: Min(oldStart1, oldStart2),
-            //      oldEnd3  : Max(oldEnd1, oldEnd1 + (oldEnd2 - newEnd1)),
-            //      newEnd3  : Max(newEnd2, newEnd2 + (newEnd1 - oldEnd2))
-            // }
+    /* @internal */
+    export function isStatement(node: Node): node is Statement {
+        const kind = node.kind;
+        return isStatementKindButNotDeclarationKind(kind)
+            || isDeclarationStatementKind(kind)
+            || kind === SyntaxKind.Block;
+    }
 
-            const oldStart1 = oldStartN;
-            const oldEnd1 = oldEndN;
-            const newEnd1 = newEndN;
+    // Module references
 
-            const oldStart2 = nextChange.span.start;
-            const oldEnd2 = textSpanEnd(nextChange.span);
-            const newEnd2 = oldStart2 + nextChange.newLength;
+    /* @internal */
+    export function isModuleReference(node: Node): node is ModuleReference {
+        const kind = node.kind;
+        return kind === SyntaxKind.ExternalModuleReference
+            || kind === SyntaxKind.QualifiedName
+            || kind === SyntaxKind.Identifier;
+    }
 
-            oldStartN = Math.min(oldStart1, oldStart2);
-            oldEndN = Math.max(oldEnd1, oldEnd1 + (oldEnd2 - newEnd1));
-            newEndN = Math.max(newEnd2, newEnd2 + (newEnd1 - oldEnd2));
-        }
+    // JSX
 
-        return createTextChangeRange(createTextSpanFromBounds(oldStartN, oldEndN), /*newLength:*/ newEndN - oldStartN);
+    /* @internal */
+    export function isJsxTagNameExpression(node: Node): node is JsxTagNameExpression {
+        const kind = node.kind;
+        return kind === SyntaxKind.ThisKeyword
+            || kind === SyntaxKind.Identifier
+            || kind === SyntaxKind.PropertyAccessExpression;
     }
 
-    export function getTypeParameterOwner(d: Declaration): Declaration {
-        if (d && d.kind === SyntaxKind.TypeParameter) {
-            for (let current: Node = d; current; current = current.parent) {
-                if (isFunctionLike(current) || isClassLike(current) || current.kind === SyntaxKind.InterfaceDeclaration) {
-                    return <Declaration>current;
-                }
-            }
-        }
+    /* @internal */
+    export function isJsxChild(node: Node): node is JsxChild {
+        const kind = node.kind;
+        return kind === SyntaxKind.JsxElement
+            || kind === SyntaxKind.JsxExpression
+            || kind === SyntaxKind.JsxSelfClosingElement
+            || kind === SyntaxKind.JsxText;
     }
 
-    export function isParameterPropertyDeclaration(node: ParameterDeclaration): boolean {
-        return hasModifier(node, ModifierFlags.ParameterPropertyModifier) && node.parent.kind === SyntaxKind.Constructor && isClassLike(node.parent.parent);
+    /* @internal */
+    export function isJsxAttributeLike(node: Node): node is JsxAttributeLike {
+        const kind = node.kind;
+        return kind === SyntaxKind.JsxAttribute
+            || kind === SyntaxKind.JsxSpreadAttribute;
     }
 
-    function walkUpBindingElementsAndPatterns(node: Node): Node {
-        while (node && (node.kind === SyntaxKind.BindingElement || isBindingPattern(node))) {
-            node = node.parent;
-        }
-
-        return node;
+    /* @internal */
+    export function isStringLiteralOrJsxExpression(node: Node): node is StringLiteral | JsxExpression {
+        const kind = node.kind;
+        return kind === SyntaxKind.StringLiteral
+            || kind === SyntaxKind.JsxExpression;
     }
 
-    export function getCombinedModifierFlags(node: Node): ModifierFlags {
-        node = walkUpBindingElementsAndPatterns(node);
-        let flags = getModifierFlags(node);
-        if (node.kind === SyntaxKind.VariableDeclaration) {
-            node = node.parent;
-        }
-
-        if (node && node.kind === SyntaxKind.VariableDeclarationList) {
-            flags |= getModifierFlags(node);
-            node = node.parent;
-        }
+    export function isJsxOpeningLikeElement(node: Node): node is JsxOpeningLikeElement {
+        const kind = node.kind;
+        return kind === SyntaxKind.JsxOpeningElement
+            || kind === SyntaxKind.JsxSelfClosingElement;
+    }
 
-        if (node && node.kind === SyntaxKind.VariableStatement) {
-            flags |= getModifierFlags(node);
-        }
+    // Clauses
 
-        return flags;
+    export function isCaseOrDefaultClause(node: Node): node is CaseOrDefaultClause {
+        const kind = node.kind;
+        return kind === SyntaxKind.CaseClause
+            || kind === SyntaxKind.DefaultClause;
     }
 
-    // Returns the node flags for this node and all relevant parent nodes.  This is done so that
-    // nodes like variable declarations and binding elements can returned a view of their flags
-    // that includes the modifiers from their container.  i.e. flags like export/declare aren't
-    // stored on the variable declaration directly, but on the containing variable statement
-    // (if it has one).  Similarly, flags for let/const are store on the variable declaration
-    // list.  By calling this function, all those flags are combined so that the client can treat
-    // the node as if it actually had those flags.
-    export function getCombinedNodeFlags(node: Node): NodeFlags {
-        node = walkUpBindingElementsAndPatterns(node);
-
-        let flags = node.flags;
-        if (node.kind === SyntaxKind.VariableDeclaration) {
-            node = node.parent;
-        }
+    // JSDoc
 
-        if (node && node.kind === SyntaxKind.VariableDeclarationList) {
-            flags |= node.flags;
-            node = node.parent;
-        }
+    /** True if node is of some JSDoc syntax kind. */
+    /* @internal */
+    export function isJSDocNode(node: Node): boolean {
+        return node.kind >= SyntaxKind.FirstJSDocNode && node.kind <= SyntaxKind.LastJSDocNode;
+    }
 
-        if (node && node.kind === SyntaxKind.VariableStatement) {
-            flags |= node.flags;
-        }
+    /** True if node is of a kind that may contain comment text. */
+    export function isJSDocCommentContainingNode(node: Node): boolean {
+        return node.kind === SyntaxKind.JSDocComment || isJSDocTag(node);
+    }
 
-        return flags;
+    // TODO: determine what this does before making it public.
+    /* @internal */
+    export function isJSDocTag(node: Node): boolean {
+        return node.kind >= SyntaxKind.FirstJSDocTagNode && node.kind <= SyntaxKind.LastJSDocTagNode;
     }
 }
diff --git a/src/compiler/visitor.ts b/src/compiler/visitor.ts
index e147eda..391fa88 100644
--- a/src/compiler/visitor.ts
+++ b/src/compiler/visitor.ts
@@ -2,1199 +2,1442 @@
 /// <reference path="factory.ts" />
 /// <reference path="utilities.ts" />
 
-/* @internal */
 namespace ts {
-    export type VisitResult<T extends Node> = T | T[];
+    /**
+     * Visits a Node using the supplied visitor, possibly returning a new Node in its place.
+     *
+     * @param node The Node to visit.
+     * @param visitor The callback used to visit the Node.
+     * @param test A callback to execute to verify the Node is valid.
+     * @param lift An optional callback to execute to lift a NodeArray into a valid Node.
+     */
+    export function visitNode<T extends Node>(node: T, visitor: Visitor, test?: (node: Node) => boolean, lift?: (node: NodeArray<Node>) => T): T;
 
     /**
-     * Describes an edge of a Node, used when traversing a syntax tree.
+     * Visits a Node using the supplied visitor, possibly returning a new Node in its place.
+     *
+     * @param node The Node to visit.
+     * @param visitor The callback used to visit the Node.
+     * @param test A callback to execute to verify the Node is valid.
+     * @param lift An optional callback to execute to lift a NodeArray into a valid Node.
      */
-    interface NodeEdge {
-        /** The property name for the edge. */
-        name: string;
+    export function visitNode<T extends Node>(node: T | undefined, visitor: Visitor, test?: (node: Node) => boolean, lift?: (node: NodeArray<Node>) => T): T | undefined;
 
-        /** Indicates that the result is optional. */
-        optional?: boolean;
+    export function visitNode<T extends Node>(node: T | undefined, visitor: Visitor, test?: (node: Node) => boolean, lift?: (node: NodeArray<Node>) => T): T | undefined {
+        if (node === undefined || visitor === undefined) {
+            return node;
+        }
 
-        /** A callback used to test whether a node is valid. */
-        test?: (node: Node) => node is Node;
+        aggregateTransformFlags(node);
+        const visited = visitor(node);
+        if (visited === node) {
+            return node;
+        }
 
-        /** A callback used to lift a NodeArrayNode into a valid node. */
-        lift?: (nodes: NodeArray<Node>) => Node;
+        let visitedNode: Node;
+        if (visited === undefined) {
+            return undefined;
+        }
+        else if (isArray(visited)) {
+            visitedNode = (lift || extractSingleNode)(visited);
+        }
+        else {
+            visitedNode = visited;
+        }
 
-        /** A callback used to parenthesize a node to preserve the intended order of operations. */
-        parenthesize?: (value: Node, parentNode: Node) => Node;
-    };
+        Debug.assertNode(visitedNode, test);
+        aggregateTransformFlags(visitedNode);
+        return <T>visitedNode;
+    }
 
     /**
-     * Describes the shape of a Node.
+     * Visits a NodeArray using the supplied visitor, possibly returning a new NodeArray in its place.
+     *
+     * @param nodes The NodeArray to visit.
+     * @param visitor The callback used to visit a Node.
+     * @param test A node test to execute for each node.
+     * @param start An optional value indicating the starting offset at which to start visiting.
+     * @param count An optional value indicating the maximum number of nodes to visit.
      */
-    type NodeTraversalPath = NodeEdge[];
+    export function visitNodes<T extends Node>(nodes: NodeArray<T>, visitor: Visitor, test?: (node: Node) => boolean, start?: number, count?: number): NodeArray<T>;
 
     /**
-     * This map contains information about the shape of each Node in "types.ts" pertaining to how
-     * each node should be traversed during a transformation.
-     *
-     * Each edge corresponds to a property in a Node subtype that should be traversed when visiting
-     * each child. The properties are assigned in the order in which traversal should occur.
+     * Visits a NodeArray using the supplied visitor, possibly returning a new NodeArray in its place.
      *
-     * We only add entries for nodes that do not have a create/update pair defined in factory.ts
+     * @param nodes The NodeArray to visit.
+     * @param visitor The callback used to visit a Node.
+     * @param test A node test to execute for each node.
+     * @param start An optional value indicating the starting offset at which to start visiting.
+     * @param count An optional value indicating the maximum number of nodes to visit.
+     */
+    export function visitNodes<T extends Node>(nodes: NodeArray<T> | undefined, visitor: Visitor, test?: (node: Node) => boolean, start?: number, count?: number): NodeArray<T> | undefined;
+
+    /**
+     * Visits a NodeArray using the supplied visitor, possibly returning a new NodeArray in its place.
      *
-     * NOTE: This needs to be kept up to date with changes to nodes in "types.ts". Currently, this
-     *       map is not comprehensive. Only node edges relevant to tree transformation are
-     *       currently defined. We may extend this to be more comprehensive, and eventually
-     *       supplant the existing `forEachChild` implementation if performance is not
-     *       significantly impacted.
+     * @param nodes The NodeArray to visit.
+     * @param visitor The callback used to visit a Node.
+     * @param test A node test to execute for each node.
+     * @param start An optional value indicating the starting offset at which to start visiting.
+     * @param count An optional value indicating the maximum number of nodes to visit.
      */
-    const nodeEdgeTraversalMap = createMap<NodeTraversalPath>({
-        [SyntaxKind.QualifiedName]: [
-            { name: "left", test: isEntityName },
-            { name: "right", test: isIdentifier }
-        ],
-        [SyntaxKind.Decorator]: [
-            { name: "expression", test: isLeftHandSideExpression }
-        ],
-        [SyntaxKind.TypeAssertionExpression]: [
-            { name: "type", test: isTypeNode },
-            { name: "expression", test: isUnaryExpression }
-        ],
-        [SyntaxKind.AsExpression]: [
-            { name: "expression", test: isExpression },
-            { name: "type", test: isTypeNode }
-        ],
-        [SyntaxKind.NonNullExpression]: [
-            { name: "expression", test: isLeftHandSideExpression }
-        ],
-        [SyntaxKind.EnumDeclaration]: [
-            { name: "decorators", test: isDecorator },
-            { name: "modifiers", test: isModifier },
-            { name: "name", test: isIdentifier },
-            { name: "members", test: isEnumMember }
-        ],
-        [SyntaxKind.ModuleDeclaration]: [
-            { name: "decorators", test: isDecorator },
-            { name: "modifiers", test: isModifier },
-            { name: "name", test: isModuleName },
-            { name: "body", test: isModuleBody }
-        ],
-        [SyntaxKind.ModuleBlock]: [
-            { name: "statements", test: isStatement }
-        ],
-        [SyntaxKind.ImportEqualsDeclaration]: [
-            { name: "decorators", test: isDecorator },
-            { name: "modifiers", test: isModifier },
-            { name: "name", test: isIdentifier },
-            { name: "moduleReference", test: isModuleReference }
-        ],
-        [SyntaxKind.ExternalModuleReference]: [
-            { name: "expression", test: isExpression, optional: true }
-        ],
-        [SyntaxKind.EnumMember]: [
-            { name: "name", test: isPropertyName },
-            { name: "initializer", test: isExpression, optional: true, parenthesize: parenthesizeExpressionForList }
-        ]
-    });
+    export function visitNodes<T extends Node>(nodes: NodeArray<T> | undefined, visitor: Visitor, test?: (node: Node) => boolean, start?: number, count?: number): NodeArray<T> | undefined {
+        if (nodes === undefined || visitor === undefined) {
+            return nodes;
+        }
 
-    function reduceNode<T>(node: Node, f: (memo: T, node: Node) => T, initial: T) {
-        return node ? f(initial, node) : initial;
+        let updated: NodeArray<T>;
+
+        // Ensure start and count have valid values
+        const length = nodes.length;
+        if (start === undefined || start < 0) {
+            start = 0;
+        }
+
+        if (count === undefined || count > length - start) {
+            count = length - start;
+        }
+
+        if (start > 0 || count < length) {
+            // If we are not visiting all of the original nodes, we must always create a new array.
+            // Since this is a fragment of a node array, we do not copy over the previous location
+            // and will only copy over `hasTrailingComma` if we are including the last element.
+            updated = createNodeArray<T>([], /*hasTrailingComma*/ nodes.hasTrailingComma && start + count === length);
+        }
+
+        // Visit each original node.
+        for (let i = 0; i < count; i++) {
+            const node = nodes[i + start];
+            aggregateTransformFlags(node);
+            const visited = node !== undefined ? visitor(node) : undefined;
+            if (updated !== undefined || visited === undefined || visited !== node) {
+                if (updated === undefined) {
+                    // Ensure we have a copy of `nodes`, up to the current index.
+                    updated = createNodeArray(nodes.slice(0, i), nodes.hasTrailingComma);
+                    setTextRange(updated, nodes);
+                }
+                if (visited) {
+                    if (isArray(visited)) {
+                        for (const visitedNode of visited) {
+                            Debug.assertNode(visitedNode, test);
+                            aggregateTransformFlags(visitedNode);
+                            updated.push(<T>visitedNode);
+                        }
+                    }
+                    else {
+                        Debug.assertNode(visited, test);
+                        aggregateTransformFlags(visited);
+                        updated.push(<T>visited);
+                    }
+                }
+            }
+        }
+
+        return updated || nodes;
     }
 
     /**
-     * Similar to `reduceLeft`, performs a reduction against each child of a node.
-     * NOTE: Unlike `forEachChild`, this does *not* visit every node. Only nodes added to the
-     *       `nodeEdgeTraversalMap` above will be visited.
+     * Starts a new lexical environment and visits a statement list, ending the lexical environment
+     * and merging hoisted declarations upon completion.
+     */
+    export function visitLexicalEnvironment(statements: NodeArray<Statement>, visitor: Visitor, context: TransformationContext, start?: number, ensureUseStrict?: boolean) {
+        context.startLexicalEnvironment();
+        statements = visitNodes(statements, visitor, isStatement, start);
+        if (ensureUseStrict && !startsWithUseStrict(statements)) {
+            statements = setTextRange(createNodeArray([createStatement(createLiteral("use strict")), ...statements]), statements);
+        }
+        const declarations = context.endLexicalEnvironment();
+        return setTextRange(createNodeArray(concatenate(statements, declarations)), statements);
+    }
+
+    /**
+     * Starts a new lexical environment and visits a parameter list, suspending the lexical
+     * environment upon completion.
+     */
+    export function visitParameterList(nodes: NodeArray<ParameterDeclaration>, visitor: Visitor, context: TransformationContext, nodesVisitor = visitNodes) {
+        context.startLexicalEnvironment();
+        const updated = nodesVisitor(nodes, visitor, isParameterDeclaration);
+        context.suspendLexicalEnvironment();
+        return updated;
+    }
+
+    /**
+     * Resumes a suspended lexical environment and visits a function body, ending the lexical
+     * environment and merging hoisted declarations upon completion.
+     */
+    export function visitFunctionBody(node: FunctionBody, visitor: Visitor, context: TransformationContext): FunctionBody;
+    /**
+     * Resumes a suspended lexical environment and visits a function body, ending the lexical
+     * environment and merging hoisted declarations upon completion.
+     */
+    export function visitFunctionBody(node: FunctionBody | undefined, visitor: Visitor, context: TransformationContext): FunctionBody | undefined;
+    /**
+     * Resumes a suspended lexical environment and visits a concise body, ending the lexical
+     * environment and merging hoisted declarations upon completion.
+     */
+    export function visitFunctionBody(node: ConciseBody, visitor: Visitor, context: TransformationContext): ConciseBody;
+    export function visitFunctionBody(node: ConciseBody, visitor: Visitor, context: TransformationContext): ConciseBody {
+        context.resumeLexicalEnvironment();
+        const updated = visitNode(node, visitor, isConciseBody);
+        const declarations = context.endLexicalEnvironment();
+        if (some(declarations)) {
+            const block = convertToFunctionBody(updated);
+            const statements = mergeLexicalEnvironment(block.statements, declarations);
+            return updateBlock(block, statements);
+        }
+        return updated;
+    }
+
+    /**
+     * Visits each child of a Node using the supplied visitor, possibly returning a new Node of the same kind in its place.
      *
-     * @param node The node containing the children to reduce.
-     * @param f The callback function
-     * @param initial The initial value to supply to the reduction.
+     * @param node The Node whose children will be visited.
+     * @param visitor The callback used to visit each child.
+     * @param context A lexical environment context for the visitor.
+     */
+    export function visitEachChild<T extends Node>(node: T, visitor: Visitor, context: TransformationContext): T;
+
+    /**
+     * Visits each child of a Node using the supplied visitor, possibly returning a new Node of the same kind in its place.
+     *
+     * @param node The Node whose children will be visited.
+     * @param visitor The callback used to visit each child.
+     * @param context A lexical environment context for the visitor.
      */
-    export function reduceEachChild<T>(node: Node, f: (memo: T, node: Node) => T, initial: T): T {
+    export function visitEachChild<T extends Node>(node: T | undefined, visitor: Visitor, context: TransformationContext, nodesVisitor?: typeof visitNodes, tokenVisitor?: Visitor): T | undefined;
+
+    export function visitEachChild(node: Node, visitor: Visitor, context: TransformationContext, nodesVisitor = visitNodes, tokenVisitor?: Visitor): Node {
         if (node === undefined) {
-            return initial;
+            return undefined;
         }
 
         const kind = node.kind;
 
         // No need to visit nodes with no children.
-        if ((kind > SyntaxKind.FirstToken && kind <= SyntaxKind.LastToken)) {
-            return initial;
+        if ((kind > SyntaxKind.FirstToken && kind <= SyntaxKind.LastToken) || kind === SyntaxKind.ThisType) {
+            return node;
         }
 
-        // We do not yet support types.
-        if ((kind >= SyntaxKind.TypePredicate && kind <= SyntaxKind.LiteralType)) {
-            return initial;
-        }
+        switch (kind) {
+            // Names
 
-        let result = initial;
-        switch (node.kind) {
-            // Leaf nodes
-            case SyntaxKind.SemicolonClassElement:
-            case SyntaxKind.EmptyStatement:
-            case SyntaxKind.OmittedExpression:
-            case SyntaxKind.DebuggerStatement:
-            case SyntaxKind.NotEmittedStatement:
-                // No need to visit nodes with no children.
-                break;
+            case SyntaxKind.Identifier:
+                return updateIdentifier(<Identifier>node, nodesVisitor((<Identifier>node).typeArguments, visitor, isTypeNode));
+
+            case SyntaxKind.QualifiedName:
+                return updateQualifiedName(<QualifiedName>node,
+                    visitNode((<QualifiedName>node).left, visitor, isEntityName),
+                    visitNode((<QualifiedName>node).right, visitor, isIdentifier));
 
-            // Names
             case SyntaxKind.ComputedPropertyName:
-                result = reduceNode((<ComputedPropertyName>node).expression, f, result);
-                break;
+                return updateComputedPropertyName(<ComputedPropertyName>node,
+                    visitNode((<ComputedPropertyName>node).expression, visitor, isExpression));
 
             // Signature elements
+
+            case SyntaxKind.TypeParameter:
+                return updateTypeParameterDeclaration(<TypeParameterDeclaration>node,
+                    visitNode((<TypeParameterDeclaration>node).name, visitor, isIdentifier),
+                    visitNode((<TypeParameterDeclaration>node).constraint, visitor, isTypeNode),
+                    visitNode((<TypeParameterDeclaration>node).default, visitor, isTypeNode));
+
             case SyntaxKind.Parameter:
-                result = reduceLeft((<ParameterDeclaration>node).decorators, f, result);
-                result = reduceLeft((<ParameterDeclaration>node).modifiers, f, result);
-                result = reduceNode((<ParameterDeclaration>node).name, f, result);
-                result = reduceNode((<ParameterDeclaration>node).type, f, result);
-                result = reduceNode((<ParameterDeclaration>node).initializer, f, result);
-                break;
+                return updateParameter(<ParameterDeclaration>node,
+                    nodesVisitor((<ParameterDeclaration>node).decorators, visitor, isDecorator),
+                    nodesVisitor((<ParameterDeclaration>node).modifiers, visitor, isModifier),
+                    visitNode((<ParameterDeclaration>node).dotDotDotToken, tokenVisitor, isToken),
+                    visitNode((<ParameterDeclaration>node).name, visitor, isBindingName),
+                    visitNode((<ParameterDeclaration>node).questionToken, tokenVisitor, isToken),
+                    visitNode((<ParameterDeclaration>node).type, visitor, isTypeNode),
+                    visitNode((<ParameterDeclaration>node).initializer, visitor, isExpression));
 
             case SyntaxKind.Decorator:
-                result = reduceNode((<Decorator>node).expression, f, result);
-                break;
+                return updateDecorator(<Decorator>node,
+                    visitNode((<Decorator>node).expression, visitor, isExpression));
+
+            // Type elements
+
+            case SyntaxKind.PropertySignature:
+                return updatePropertySignature((<PropertySignature>node),
+                    nodesVisitor((<PropertySignature>node).modifiers, visitor, isToken),
+                    visitNode((<PropertySignature>node).name, visitor, isPropertyName),
+                    visitNode((<PropertySignature>node).questionToken, tokenVisitor, isToken),
+                    visitNode((<PropertySignature>node).type, visitor, isTypeNode),
+                    visitNode((<PropertySignature>node).initializer, visitor, isExpression));
 
-            // Type member
             case SyntaxKind.PropertyDeclaration:
-                result = reduceLeft((<PropertyDeclaration>node).decorators, f, result);
-                result = reduceLeft((<PropertyDeclaration>node).modifiers, f, result);
-                result = reduceNode((<PropertyDeclaration>node).name, f, result);
-                result = reduceNode((<PropertyDeclaration>node).type, f, result);
-                result = reduceNode((<PropertyDeclaration>node).initializer, f, result);
-                break;
+                return updateProperty(<PropertyDeclaration>node,
+                    nodesVisitor((<PropertyDeclaration>node).decorators, visitor, isDecorator),
+                    nodesVisitor((<PropertyDeclaration>node).modifiers, visitor, isModifier),
+                    visitNode((<PropertyDeclaration>node).name, visitor, isPropertyName),
+                    visitNode((<PropertyDeclaration>node).type, visitor, isTypeNode),
+                    visitNode((<PropertyDeclaration>node).initializer, visitor, isExpression));
+
+            case SyntaxKind.MethodSignature:
+                return updateMethodSignature(<MethodSignature>node,
+                    nodesVisitor((<MethodSignature>node).typeParameters, visitor, isTypeParameterDeclaration),
+                    nodesVisitor((<MethodSignature>node).parameters, visitor, isParameterDeclaration),
+                    visitNode((<MethodSignature>node).type, visitor, isTypeNode),
+                    visitNode((<MethodSignature>node).name, visitor, isPropertyName),
+                    visitNode((<MethodSignature>node).questionToken, tokenVisitor, isToken));
 
             case SyntaxKind.MethodDeclaration:
-                result = reduceLeft((<MethodDeclaration>node).decorators, f, result);
-                result = reduceLeft((<MethodDeclaration>node).modifiers, f, result);
-                result = reduceNode((<MethodDeclaration>node).name, f, result);
-                result = reduceLeft((<MethodDeclaration>node).typeParameters, f, result);
-                result = reduceLeft((<MethodDeclaration>node).parameters, f, result);
-                result = reduceNode((<MethodDeclaration>node).type, f, result);
-                result = reduceNode((<MethodDeclaration>node).body, f, result);
-                break;
+                return updateMethod(<MethodDeclaration>node,
+                    nodesVisitor((<MethodDeclaration>node).decorators, visitor, isDecorator),
+                    nodesVisitor((<MethodDeclaration>node).modifiers, visitor, isModifier),
+                    visitNode((<MethodDeclaration>node).asteriskToken, tokenVisitor, isToken),
+                    visitNode((<MethodDeclaration>node).name, visitor, isPropertyName),
+                    visitNode((<MethodDeclaration>node).questionToken, tokenVisitor, isToken),
+                    nodesVisitor((<MethodDeclaration>node).typeParameters, visitor, isTypeParameterDeclaration),
+                    visitParameterList((<MethodDeclaration>node).parameters, visitor, context, nodesVisitor),
+                    visitNode((<MethodDeclaration>node).type, visitor, isTypeNode),
+                    visitFunctionBody((<MethodDeclaration>node).body, visitor, context));
 
             case SyntaxKind.Constructor:
-                result = reduceLeft((<ConstructorDeclaration>node).modifiers, f, result);
-                result = reduceLeft((<ConstructorDeclaration>node).parameters, f, result);
-                result = reduceNode((<ConstructorDeclaration>node).body, f, result);
-                break;
+                return updateConstructor(<ConstructorDeclaration>node,
+                    nodesVisitor((<ConstructorDeclaration>node).decorators, visitor, isDecorator),
+                    nodesVisitor((<ConstructorDeclaration>node).modifiers, visitor, isModifier),
+                    visitParameterList((<ConstructorDeclaration>node).parameters, visitor, context, nodesVisitor),
+                    visitFunctionBody((<ConstructorDeclaration>node).body, visitor, context));
 
             case SyntaxKind.GetAccessor:
-                result = reduceLeft((<GetAccessorDeclaration>node).decorators, f, result);
-                result = reduceLeft((<GetAccessorDeclaration>node).modifiers, f, result);
-                result = reduceNode((<GetAccessorDeclaration>node).name, f, result);
-                result = reduceLeft((<GetAccessorDeclaration>node).parameters, f, result);
-                result = reduceNode((<GetAccessorDeclaration>node).type, f, result);
-                result = reduceNode((<GetAccessorDeclaration>node).body, f, result);
-                break;
+                return updateGetAccessor(<GetAccessorDeclaration>node,
+                    nodesVisitor((<GetAccessorDeclaration>node).decorators, visitor, isDecorator),
+                    nodesVisitor((<GetAccessorDeclaration>node).modifiers, visitor, isModifier),
+                    visitNode((<GetAccessorDeclaration>node).name, visitor, isPropertyName),
+                    visitParameterList((<GetAccessorDeclaration>node).parameters, visitor, context, nodesVisitor),
+                    visitNode((<GetAccessorDeclaration>node).type, visitor, isTypeNode),
+                    visitFunctionBody((<GetAccessorDeclaration>node).body, visitor, context));
 
             case SyntaxKind.SetAccessor:
-                result = reduceLeft((<GetAccessorDeclaration>node).decorators, f, result);
-                result = reduceLeft((<GetAccessorDeclaration>node).modifiers, f, result);
-                result = reduceNode((<GetAccessorDeclaration>node).name, f, result);
-                result = reduceLeft((<GetAccessorDeclaration>node).parameters, f, result);
-                result = reduceNode((<GetAccessorDeclaration>node).body, f, result);
-                break;
+                return updateSetAccessor(<SetAccessorDeclaration>node,
+                    nodesVisitor((<SetAccessorDeclaration>node).decorators, visitor, isDecorator),
+                    nodesVisitor((<SetAccessorDeclaration>node).modifiers, visitor, isModifier),
+                    visitNode((<SetAccessorDeclaration>node).name, visitor, isPropertyName),
+                    visitParameterList((<SetAccessorDeclaration>node).parameters, visitor, context, nodesVisitor),
+                    visitFunctionBody((<SetAccessorDeclaration>node).body, visitor, context));
+
+            case SyntaxKind.CallSignature:
+                return updateCallSignature(<CallSignatureDeclaration>node,
+                    nodesVisitor((<CallSignatureDeclaration>node).typeParameters, visitor, isTypeParameterDeclaration),
+                    nodesVisitor((<CallSignatureDeclaration>node).parameters, visitor, isParameterDeclaration),
+                    visitNode((<CallSignatureDeclaration>node).type, visitor, isTypeNode));
+
+            case SyntaxKind.ConstructSignature:
+                return updateConstructSignature(<ConstructSignatureDeclaration>node,
+                    nodesVisitor((<ConstructSignatureDeclaration>node).typeParameters, visitor, isTypeParameterDeclaration),
+                    nodesVisitor((<ConstructSignatureDeclaration>node).parameters, visitor, isParameterDeclaration),
+                    visitNode((<ConstructSignatureDeclaration>node).type, visitor, isTypeNode));
+
+            case SyntaxKind.IndexSignature:
+                return updateIndexSignature(<IndexSignatureDeclaration>node,
+                    nodesVisitor((<IndexSignatureDeclaration>node).decorators, visitor, isDecorator),
+                    nodesVisitor((<IndexSignatureDeclaration>node).modifiers, visitor, isModifier),
+                    nodesVisitor((<IndexSignatureDeclaration>node).parameters, visitor, isParameterDeclaration),
+                    visitNode((<IndexSignatureDeclaration>node).type, visitor, isTypeNode));
+
+            // Types
+
+            case SyntaxKind.TypePredicate:
+                return updateTypePredicateNode(<TypePredicateNode>node,
+                    visitNode((<TypePredicateNode>node).parameterName, visitor),
+                    visitNode((<TypePredicateNode>node).type, visitor, isTypeNode));
+
+            case SyntaxKind.TypeReference:
+                return updateTypeReferenceNode(<TypeReferenceNode>node,
+                    visitNode((<TypeReferenceNode>node).typeName, visitor, isEntityName),
+                    nodesVisitor((<TypeReferenceNode>node).typeArguments, visitor, isTypeNode));
+
+            case SyntaxKind.FunctionType:
+                return updateFunctionTypeNode(<FunctionTypeNode>node,
+                    nodesVisitor((<FunctionTypeNode>node).typeParameters, visitor, isTypeParameterDeclaration),
+                    nodesVisitor((<FunctionTypeNode>node).parameters, visitor, isParameterDeclaration),
+                    visitNode((<FunctionTypeNode>node).type, visitor, isTypeNode));
+
+            case SyntaxKind.ConstructorType:
+                return updateConstructorTypeNode(<ConstructorTypeNode>node,
+                    nodesVisitor((<ConstructorTypeNode>node).typeParameters, visitor, isTypeParameterDeclaration),
+                    nodesVisitor((<ConstructorTypeNode>node).parameters, visitor, isParameterDeclaration),
+                    visitNode((<ConstructorTypeNode>node).type, visitor, isTypeNode));
+
+            case SyntaxKind.TypeQuery:
+                return updateTypeQueryNode((<TypeQueryNode>node),
+                    visitNode((<TypeQueryNode>node).exprName, visitor, isEntityName));
+
+            case SyntaxKind.TypeLiteral:
+                return updateTypeLiteralNode((<TypeLiteralNode>node),
+                    nodesVisitor((<TypeLiteralNode>node).members, visitor, isTypeElement));
+
+            case SyntaxKind.ArrayType:
+                return updateArrayTypeNode(<ArrayTypeNode>node,
+                    visitNode((<ArrayTypeNode>node).elementType, visitor, isTypeNode));
+
+            case SyntaxKind.TupleType:
+                return updateTypleTypeNode((<TupleTypeNode>node),
+                    nodesVisitor((<TupleTypeNode>node).elementTypes, visitor, isTypeNode));
+
+            case SyntaxKind.UnionType:
+                return updateUnionTypeNode(<UnionTypeNode>node,
+                    nodesVisitor((<UnionTypeNode>node).types, visitor, isTypeNode));
+
+            case SyntaxKind.IntersectionType:
+                return updateIntersectionTypeNode(<IntersectionTypeNode>node,
+                    nodesVisitor((<IntersectionTypeNode>node).types, visitor, isTypeNode));
+
+            case SyntaxKind.ParenthesizedType:
+                return updateParenthesizedType(<ParenthesizedTypeNode>node,
+                    visitNode((<ParenthesizedTypeNode>node).type, visitor, isTypeNode));
+
+            case SyntaxKind.TypeOperator:
+                return updateTypeOperatorNode(<TypeOperatorNode>node,
+                    visitNode((<TypeOperatorNode>node).type, visitor, isTypeNode));
+
+            case SyntaxKind.IndexedAccessType:
+                return updateIndexedAccessTypeNode((<IndexedAccessTypeNode>node),
+                    visitNode((<IndexedAccessTypeNode>node).objectType, visitor, isTypeNode),
+                    visitNode((<IndexedAccessTypeNode>node).indexType, visitor, isTypeNode));
+
+            case SyntaxKind.MappedType:
+                return updateMappedTypeNode((<MappedTypeNode>node),
+                    visitNode((<MappedTypeNode>node).readonlyToken, tokenVisitor, isToken),
+                    visitNode((<MappedTypeNode>node).typeParameter, visitor, isTypeParameterDeclaration),
+                    visitNode((<MappedTypeNode>node).questionToken, tokenVisitor, isToken),
+                    visitNode((<MappedTypeNode>node).type, visitor, isTypeNode));
+
+            case SyntaxKind.LiteralType:
+                return updateLiteralTypeNode(<LiteralTypeNode>node,
+                    visitNode((<LiteralTypeNode>node).literal, visitor, isExpression));
 
             // Binding patterns
+
             case SyntaxKind.ObjectBindingPattern:
+                return updateObjectBindingPattern(<ObjectBindingPattern>node,
+                    nodesVisitor((<ObjectBindingPattern>node).elements, visitor, isBindingElement));
+
             case SyntaxKind.ArrayBindingPattern:
-                result = reduceLeft((<BindingPattern>node).elements, f, result);
-                break;
+                return updateArrayBindingPattern(<ArrayBindingPattern>node,
+                    nodesVisitor((<ArrayBindingPattern>node).elements, visitor, isArrayBindingElement));
 
             case SyntaxKind.BindingElement:
-                result = reduceNode((<BindingElement>node).propertyName, f, result);
-                result = reduceNode((<BindingElement>node).name, f, result);
-                result = reduceNode((<BindingElement>node).initializer, f, result);
-                break;
+                return updateBindingElement(<BindingElement>node,
+                    visitNode((<BindingElement>node).dotDotDotToken, tokenVisitor, isToken),
+                    visitNode((<BindingElement>node).propertyName, visitor, isPropertyName),
+                    visitNode((<BindingElement>node).name, visitor, isBindingName),
+                    visitNode((<BindingElement>node).initializer, visitor, isExpression));
 
             // Expression
+
             case SyntaxKind.ArrayLiteralExpression:
-                result = reduceLeft((<ArrayLiteralExpression>node).elements, f, result);
-                break;
+                return updateArrayLiteral(<ArrayLiteralExpression>node,
+                    nodesVisitor((<ArrayLiteralExpression>node).elements, visitor, isExpression));
 
             case SyntaxKind.ObjectLiteralExpression:
-                result = reduceLeft((<ObjectLiteralExpression>node).properties, f, result);
-                break;
+                return updateObjectLiteral(<ObjectLiteralExpression>node,
+                    nodesVisitor((<ObjectLiteralExpression>node).properties, visitor, isObjectLiteralElementLike));
 
             case SyntaxKind.PropertyAccessExpression:
-                result = reduceNode((<PropertyAccessExpression>node).expression, f, result);
-                result = reduceNode((<PropertyAccessExpression>node).name, f, result);
-                break;
+                return updatePropertyAccess(<PropertyAccessExpression>node,
+                    visitNode((<PropertyAccessExpression>node).expression, visitor, isExpression),
+                    visitNode((<PropertyAccessExpression>node).name, visitor, isIdentifier));
 
             case SyntaxKind.ElementAccessExpression:
-                result = reduceNode((<ElementAccessExpression>node).expression, f, result);
-                result = reduceNode((<ElementAccessExpression>node).argumentExpression, f, result);
-                break;
+                return updateElementAccess(<ElementAccessExpression>node,
+                    visitNode((<ElementAccessExpression>node).expression, visitor, isExpression),
+                    visitNode((<ElementAccessExpression>node).argumentExpression, visitor, isExpression));
 
             case SyntaxKind.CallExpression:
-                result = reduceNode((<CallExpression>node).expression, f, result);
-                result = reduceLeft((<CallExpression>node).typeArguments, f, result);
-                result = reduceLeft((<CallExpression>node).arguments, f, result);
-                break;
+                return updateCall(<CallExpression>node,
+                    visitNode((<CallExpression>node).expression, visitor, isExpression),
+                    nodesVisitor((<CallExpression>node).typeArguments, visitor, isTypeNode),
+                    nodesVisitor((<CallExpression>node).arguments, visitor, isExpression));
 
             case SyntaxKind.NewExpression:
-                result = reduceNode((<NewExpression>node).expression, f, result);
-                result = reduceLeft((<NewExpression>node).typeArguments, f, result);
-                result = reduceLeft((<NewExpression>node).arguments, f, result);
-                break;
+                return updateNew(<NewExpression>node,
+                    visitNode((<NewExpression>node).expression, visitor, isExpression),
+                    nodesVisitor((<NewExpression>node).typeArguments, visitor, isTypeNode),
+                    nodesVisitor((<NewExpression>node).arguments, visitor, isExpression));
 
             case SyntaxKind.TaggedTemplateExpression:
-                result = reduceNode((<TaggedTemplateExpression>node).tag, f, result);
-                result = reduceNode((<TaggedTemplateExpression>node).template, f, result);
-                break;
+                return updateTaggedTemplate(<TaggedTemplateExpression>node,
+                    visitNode((<TaggedTemplateExpression>node).tag, visitor, isExpression),
+                    visitNode((<TaggedTemplateExpression>node).template, visitor, isTemplateLiteral));
+
+            case SyntaxKind.TypeAssertionExpression:
+                return updateTypeAssertion(<TypeAssertion>node,
+                    visitNode((<TypeAssertion>node).type, visitor, isTypeNode),
+                    visitNode((<TypeAssertion>node).expression, visitor, isExpression));
+
+            case SyntaxKind.ParenthesizedExpression:
+                return updateParen(<ParenthesizedExpression>node,
+                    visitNode((<ParenthesizedExpression>node).expression, visitor, isExpression));
 
             case SyntaxKind.FunctionExpression:
-                result = reduceLeft((<FunctionExpression>node).modifiers, f, result);
-                result = reduceNode((<FunctionExpression>node).name, f, result);
-                result = reduceLeft((<FunctionExpression>node).typeParameters, f, result);
-                result = reduceLeft((<FunctionExpression>node).parameters, f, result);
-                result = reduceNode((<FunctionExpression>node).type, f, result);
-                result = reduceNode((<FunctionExpression>node).body, f, result);
-                break;
+                return updateFunctionExpression(<FunctionExpression>node,
+                    nodesVisitor((<FunctionExpression>node).modifiers, visitor, isModifier),
+                    visitNode((<FunctionExpression>node).asteriskToken, tokenVisitor, isToken),
+                    visitNode((<FunctionExpression>node).name, visitor, isIdentifier),
+                    nodesVisitor((<FunctionExpression>node).typeParameters, visitor, isTypeParameterDeclaration),
+                    visitParameterList((<FunctionExpression>node).parameters, visitor, context, nodesVisitor),
+                    visitNode((<FunctionExpression>node).type, visitor, isTypeNode),
+                    visitFunctionBody((<FunctionExpression>node).body, visitor, context));
 
             case SyntaxKind.ArrowFunction:
-                result = reduceLeft((<ArrowFunction>node).modifiers, f, result);
-                result = reduceLeft((<ArrowFunction>node).typeParameters, f, result);
-                result = reduceLeft((<ArrowFunction>node).parameters, f, result);
-                result = reduceNode((<ArrowFunction>node).type, f, result);
-                result = reduceNode((<ArrowFunction>node).body, f, result);
-                break;
+                return updateArrowFunction(<ArrowFunction>node,
+                    nodesVisitor((<ArrowFunction>node).modifiers, visitor, isModifier),
+                    nodesVisitor((<ArrowFunction>node).typeParameters, visitor, isTypeParameterDeclaration),
+                    visitParameterList((<ArrowFunction>node).parameters, visitor, context, nodesVisitor),
+                    visitNode((<ArrowFunction>node).type, visitor, isTypeNode),
+                    visitFunctionBody((<ArrowFunction>node).body, visitor, context));
 
-            case SyntaxKind.ParenthesizedExpression:
             case SyntaxKind.DeleteExpression:
+                return updateDelete(<DeleteExpression>node,
+                    visitNode((<DeleteExpression>node).expression, visitor, isExpression));
+
             case SyntaxKind.TypeOfExpression:
+                return updateTypeOf(<TypeOfExpression>node,
+                    visitNode((<TypeOfExpression>node).expression, visitor, isExpression));
+
             case SyntaxKind.VoidExpression:
+                return updateVoid(<VoidExpression>node,
+                    visitNode((<VoidExpression>node).expression, visitor, isExpression));
+
             case SyntaxKind.AwaitExpression:
-            case SyntaxKind.YieldExpression:
-            case SyntaxKind.SpreadElementExpression:
-            case SyntaxKind.NonNullExpression:
-                result = reduceNode((<ParenthesizedExpression | DeleteExpression | TypeOfExpression | VoidExpression | AwaitExpression | YieldExpression | SpreadElementExpression | NonNullExpression>node).expression, f, result);
-                break;
+                return updateAwait(<AwaitExpression>node,
+                    visitNode((<AwaitExpression>node).expression, visitor, isExpression));
 
             case SyntaxKind.PrefixUnaryExpression:
+                return updatePrefix(<PrefixUnaryExpression>node,
+                    visitNode((<PrefixUnaryExpression>node).operand, visitor, isExpression));
+
             case SyntaxKind.PostfixUnaryExpression:
-                result = reduceNode((<PrefixUnaryExpression | PostfixUnaryExpression>node).operand, f, result);
-                break;
+                return updatePostfix(<PostfixUnaryExpression>node,
+                    visitNode((<PostfixUnaryExpression>node).operand, visitor, isExpression));
 
             case SyntaxKind.BinaryExpression:
-                result = reduceNode((<BinaryExpression>node).left, f, result);
-                result = reduceNode((<BinaryExpression>node).right, f, result);
-                break;
+                return updateBinary(<BinaryExpression>node,
+                    visitNode((<BinaryExpression>node).left, visitor, isExpression),
+                    visitNode((<BinaryExpression>node).right, visitor, isExpression),
+                    visitNode((<BinaryExpression>node).operatorToken, visitor, isToken));
 
             case SyntaxKind.ConditionalExpression:
-                result = reduceNode((<ConditionalExpression>node).condition, f, result);
-                result = reduceNode((<ConditionalExpression>node).whenTrue, f, result);
-                result = reduceNode((<ConditionalExpression>node).whenFalse, f, result);
-                break;
+                return updateConditional(<ConditionalExpression>node,
+                    visitNode((<ConditionalExpression>node).condition, visitor, isExpression),
+                    visitNode((<ConditionalExpression>node).whenTrue, visitor, isExpression),
+                    visitNode((<ConditionalExpression>node).whenFalse, visitor, isExpression));
 
             case SyntaxKind.TemplateExpression:
-                result = reduceNode((<TemplateExpression>node).head, f, result);
-                result = reduceLeft((<TemplateExpression>node).templateSpans, f, result);
-                break;
+                return updateTemplateExpression(<TemplateExpression>node,
+                    visitNode((<TemplateExpression>node).head, visitor, isTemplateHead),
+                    nodesVisitor((<TemplateExpression>node).templateSpans, visitor, isTemplateSpan));
+
+            case SyntaxKind.YieldExpression:
+                return updateYield(<YieldExpression>node,
+                    visitNode((<YieldExpression>node).asteriskToken, tokenVisitor, isToken),
+                    visitNode((<YieldExpression>node).expression, visitor, isExpression));
+
+            case SyntaxKind.SpreadElement:
+                return updateSpread(<SpreadElement>node,
+                    visitNode((<SpreadElement>node).expression, visitor, isExpression));
 
             case SyntaxKind.ClassExpression:
-                result = reduceLeft((<ClassExpression>node).modifiers, f, result);
-                result = reduceNode((<ClassExpression>node).name, f, result);
-                result = reduceLeft((<ClassExpression>node).typeParameters, f, result);
-                result = reduceLeft((<ClassExpression>node).heritageClauses, f, result);
-                result = reduceLeft((<ClassExpression>node).members, f, result);
-                break;
+                return updateClassExpression(<ClassExpression>node,
+                    nodesVisitor((<ClassExpression>node).modifiers, visitor, isModifier),
+                    visitNode((<ClassExpression>node).name, visitor, isIdentifier),
+                    nodesVisitor((<ClassExpression>node).typeParameters, visitor, isTypeParameterDeclaration),
+                    nodesVisitor((<ClassExpression>node).heritageClauses, visitor, isHeritageClause),
+                    nodesVisitor((<ClassExpression>node).members, visitor, isClassElement));
 
             case SyntaxKind.ExpressionWithTypeArguments:
-                result = reduceNode((<ExpressionWithTypeArguments>node).expression, f, result);
-                result = reduceLeft((<ExpressionWithTypeArguments>node).typeArguments, f, result);
-                break;
+                return updateExpressionWithTypeArguments(<ExpressionWithTypeArguments>node,
+                    nodesVisitor((<ExpressionWithTypeArguments>node).typeArguments, visitor, isTypeNode),
+                    visitNode((<ExpressionWithTypeArguments>node).expression, visitor, isExpression));
+
+            case SyntaxKind.AsExpression:
+                return updateAsExpression(<AsExpression>node,
+                    visitNode((<AsExpression>node).expression, visitor, isExpression),
+                    visitNode((<AsExpression>node).type, visitor, isTypeNode));
+
+            case SyntaxKind.NonNullExpression:
+                return updateNonNullExpression(<NonNullExpression>node,
+                    visitNode((<NonNullExpression>node).expression, visitor, isExpression));
+
+            case SyntaxKind.MetaProperty:
+                return updateMetaProperty(<MetaProperty>node,
+                    visitNode((<MetaProperty>node).name, visitor, isIdentifier));
 
             // Misc
+
             case SyntaxKind.TemplateSpan:
-                result = reduceNode((<TemplateSpan>node).expression, f, result);
-                result = reduceNode((<TemplateSpan>node).literal, f, result);
-                break;
+                return updateTemplateSpan(<TemplateSpan>node,
+                    visitNode((<TemplateSpan>node).expression, visitor, isExpression),
+                    visitNode((<TemplateSpan>node).literal, visitor, isTemplateMiddleOrTemplateTail));
 
             // Element
+
             case SyntaxKind.Block:
-                result = reduceLeft((<Block>node).statements, f, result);
-                break;
+                return updateBlock(<Block>node,
+                    nodesVisitor((<Block>node).statements, visitor, isStatement));
 
             case SyntaxKind.VariableStatement:
-                result = reduceLeft((<VariableStatement>node).modifiers, f, result);
-                result = reduceNode((<VariableStatement>node).declarationList, f, result);
-                break;
+                return updateVariableStatement(<VariableStatement>node,
+                    nodesVisitor((<VariableStatement>node).modifiers, visitor, isModifier),
+                    visitNode((<VariableStatement>node).declarationList, visitor, isVariableDeclarationList));
 
             case SyntaxKind.ExpressionStatement:
-                result = reduceNode((<ExpressionStatement>node).expression, f, result);
-                break;
+                return updateStatement(<ExpressionStatement>node,
+                    visitNode((<ExpressionStatement>node).expression, visitor, isExpression));
 
             case SyntaxKind.IfStatement:
-                result = reduceNode((<IfStatement>node).expression, f, result);
-                result = reduceNode((<IfStatement>node).thenStatement, f, result);
-                result = reduceNode((<IfStatement>node).elseStatement, f, result);
-                break;
+                return updateIf(<IfStatement>node,
+                    visitNode((<IfStatement>node).expression, visitor, isExpression),
+                    visitNode((<IfStatement>node).thenStatement, visitor, isStatement, liftToBlock),
+                    visitNode((<IfStatement>node).elseStatement, visitor, isStatement, liftToBlock));
 
             case SyntaxKind.DoStatement:
-                result = reduceNode((<DoStatement>node).statement, f, result);
-                result = reduceNode((<DoStatement>node).expression, f, result);
-                break;
+                return updateDo(<DoStatement>node,
+                    visitNode((<DoStatement>node).statement, visitor, isStatement, liftToBlock),
+                    visitNode((<DoStatement>node).expression, visitor, isExpression));
 
             case SyntaxKind.WhileStatement:
-            case SyntaxKind.WithStatement:
-                result = reduceNode((<WhileStatement | WithStatement>node).expression, f, result);
-                result = reduceNode((<WhileStatement | WithStatement>node).statement, f, result);
-                break;
+                return updateWhile(<WhileStatement>node,
+                    visitNode((<WhileStatement>node).expression, visitor, isExpression),
+                    visitNode((<WhileStatement>node).statement, visitor, isStatement, liftToBlock));
 
             case SyntaxKind.ForStatement:
-                result = reduceNode((<ForStatement>node).initializer, f, result);
-                result = reduceNode((<ForStatement>node).condition, f, result);
-                result = reduceNode((<ForStatement>node).incrementor, f, result);
-                result = reduceNode((<ForStatement>node).statement, f, result);
-                break;
+                return updateFor(<ForStatement>node,
+                    visitNode((<ForStatement>node).initializer, visitor, isForInitializer),
+                    visitNode((<ForStatement>node).condition, visitor, isExpression),
+                    visitNode((<ForStatement>node).incrementor, visitor, isExpression),
+                    visitNode((<ForStatement>node).statement, visitor, isStatement, liftToBlock));
 
             case SyntaxKind.ForInStatement:
+                return updateForIn(<ForInStatement>node,
+                    visitNode((<ForInStatement>node).initializer, visitor, isForInitializer),
+                    visitNode((<ForInStatement>node).expression, visitor, isExpression),
+                    visitNode((<ForInStatement>node).statement, visitor, isStatement, liftToBlock));
+
             case SyntaxKind.ForOfStatement:
-                result = reduceNode((<ForInStatement | ForOfStatement>node).initializer, f, result);
-                result = reduceNode((<ForInStatement | ForOfStatement>node).expression, f, result);
-                result = reduceNode((<ForInStatement | ForOfStatement>node).statement, f, result);
-                break;
+                return updateForOf(<ForOfStatement>node,
+                    (<ForOfStatement>node).awaitModifier,
+                    visitNode((<ForOfStatement>node).initializer, visitor, isForInitializer),
+                    visitNode((<ForOfStatement>node).expression, visitor, isExpression),
+                    visitNode((<ForOfStatement>node).statement, visitor, isStatement, liftToBlock));
+
+            case SyntaxKind.ContinueStatement:
+                return updateContinue(<ContinueStatement>node,
+                    visitNode((<ContinueStatement>node).label, visitor, isIdentifier));
+
+            case SyntaxKind.BreakStatement:
+                return updateBreak(<BreakStatement>node,
+                    visitNode((<BreakStatement>node).label, visitor, isIdentifier));
 
             case SyntaxKind.ReturnStatement:
-            case SyntaxKind.ThrowStatement:
-                result = reduceNode((<ReturnStatement>node).expression, f, result);
-                break;
+                return updateReturn(<ReturnStatement>node,
+                    visitNode((<ReturnStatement>node).expression, visitor, isExpression));
+
+            case SyntaxKind.WithStatement:
+                return updateWith(<WithStatement>node,
+                    visitNode((<WithStatement>node).expression, visitor, isExpression),
+                    visitNode((<WithStatement>node).statement, visitor, isStatement, liftToBlock));
 
             case SyntaxKind.SwitchStatement:
-                result = reduceNode((<SwitchStatement>node).expression, f, result);
-                result = reduceNode((<SwitchStatement>node).caseBlock, f, result);
-                break;
+                return updateSwitch(<SwitchStatement>node,
+                    visitNode((<SwitchStatement>node).expression, visitor, isExpression),
+                    visitNode((<SwitchStatement>node).caseBlock, visitor, isCaseBlock));
 
             case SyntaxKind.LabeledStatement:
-                result = reduceNode((<LabeledStatement>node).label, f, result);
-                result = reduceNode((<LabeledStatement>node).statement, f, result);
-                break;
+                return updateLabel(<LabeledStatement>node,
+                    visitNode((<LabeledStatement>node).label, visitor, isIdentifier),
+                    visitNode((<LabeledStatement>node).statement, visitor, isStatement, liftToBlock));
+
+            case SyntaxKind.ThrowStatement:
+                return updateThrow(<ThrowStatement>node,
+                    visitNode((<ThrowStatement>node).expression, visitor, isExpression));
 
             case SyntaxKind.TryStatement:
-                result = reduceNode((<TryStatement>node).tryBlock, f, result);
-                result = reduceNode((<TryStatement>node).catchClause, f, result);
-                result = reduceNode((<TryStatement>node).finallyBlock, f, result);
-                break;
+                return updateTry(<TryStatement>node,
+                    visitNode((<TryStatement>node).tryBlock, visitor, isBlock),
+                    visitNode((<TryStatement>node).catchClause, visitor, isCatchClause),
+                    visitNode((<TryStatement>node).finallyBlock, visitor, isBlock));
 
             case SyntaxKind.VariableDeclaration:
-                result = reduceNode((<VariableDeclaration>node).name, f, result);
-                result = reduceNode((<VariableDeclaration>node).type, f, result);
-                result = reduceNode((<VariableDeclaration>node).initializer, f, result);
-                break;
+                return updateVariableDeclaration(<VariableDeclaration>node,
+                    visitNode((<VariableDeclaration>node).name, visitor, isBindingName),
+                    visitNode((<VariableDeclaration>node).type, visitor, isTypeNode),
+                    visitNode((<VariableDeclaration>node).initializer, visitor, isExpression));
 
             case SyntaxKind.VariableDeclarationList:
-                result = reduceLeft((<VariableDeclarationList>node).declarations, f, result);
-                break;
+                return updateVariableDeclarationList(<VariableDeclarationList>node,
+                    nodesVisitor((<VariableDeclarationList>node).declarations, visitor, isVariableDeclaration));
 
             case SyntaxKind.FunctionDeclaration:
-                result = reduceLeft((<FunctionDeclaration>node).decorators, f, result);
-                result = reduceLeft((<FunctionDeclaration>node).modifiers, f, result);
-                result = reduceNode((<FunctionDeclaration>node).name, f, result);
-                result = reduceLeft((<FunctionDeclaration>node).typeParameters, f, result);
-                result = reduceLeft((<FunctionDeclaration>node).parameters, f, result);
-                result = reduceNode((<FunctionDeclaration>node).type, f, result);
-                result = reduceNode((<FunctionDeclaration>node).body, f, result);
-                break;
+                return updateFunctionDeclaration(<FunctionDeclaration>node,
+                    nodesVisitor((<FunctionDeclaration>node).decorators, visitor, isDecorator),
+                    nodesVisitor((<FunctionDeclaration>node).modifiers, visitor, isModifier),
+                    visitNode((<FunctionDeclaration>node).asteriskToken, tokenVisitor, isToken),
+                    visitNode((<FunctionDeclaration>node).name, visitor, isIdentifier),
+                    nodesVisitor((<FunctionDeclaration>node).typeParameters, visitor, isTypeParameterDeclaration),
+                    visitParameterList((<FunctionDeclaration>node).parameters, visitor, context, nodesVisitor),
+                    visitNode((<FunctionDeclaration>node).type, visitor, isTypeNode),
+                    visitFunctionBody((<FunctionExpression>node).body, visitor, context));
 
             case SyntaxKind.ClassDeclaration:
-                result = reduceLeft((<ClassDeclaration>node).decorators, f, result);
-                result = reduceLeft((<ClassDeclaration>node).modifiers, f, result);
-                result = reduceNode((<ClassDeclaration>node).name, f, result);
-                result = reduceLeft((<ClassDeclaration>node).typeParameters, f, result);
-                result = reduceLeft((<ClassDeclaration>node).heritageClauses, f, result);
-                result = reduceLeft((<ClassDeclaration>node).members, f, result);
-                break;
+                return updateClassDeclaration(<ClassDeclaration>node,
+                    nodesVisitor((<ClassDeclaration>node).decorators, visitor, isDecorator),
+                    nodesVisitor((<ClassDeclaration>node).modifiers, visitor, isModifier),
+                    visitNode((<ClassDeclaration>node).name, visitor, isIdentifier),
+                    nodesVisitor((<ClassDeclaration>node).typeParameters, visitor, isTypeParameterDeclaration),
+                    nodesVisitor((<ClassDeclaration>node).heritageClauses, visitor, isHeritageClause),
+                    nodesVisitor((<ClassDeclaration>node).members, visitor, isClassElement));
+
+            case SyntaxKind.InterfaceDeclaration:
+                return updateInterfaceDeclaration(<InterfaceDeclaration>node,
+                    nodesVisitor((<InterfaceDeclaration>node).decorators, visitor, isDecorator),
+                    nodesVisitor((<InterfaceDeclaration>node).modifiers, visitor, isModifier),
+                    visitNode((<InterfaceDeclaration>node).name, visitor, isIdentifier),
+                    nodesVisitor((<InterfaceDeclaration>node).typeParameters, visitor, isTypeParameterDeclaration),
+                    nodesVisitor((<InterfaceDeclaration>node).heritageClauses, visitor, isHeritageClause),
+                    nodesVisitor((<InterfaceDeclaration>node).members, visitor, isTypeElement));
+
+            case SyntaxKind.TypeAliasDeclaration:
+                return updateTypeAliasDeclaration(<TypeAliasDeclaration>node,
+                    nodesVisitor((<TypeAliasDeclaration>node).decorators, visitor, isDecorator),
+                    nodesVisitor((<TypeAliasDeclaration>node).modifiers, visitor, isModifier),
+                    visitNode((<TypeAliasDeclaration>node).name, visitor, isIdentifier),
+                    nodesVisitor((<TypeAliasDeclaration>node).typeParameters, visitor, isTypeParameterDeclaration),
+                    visitNode((<TypeAliasDeclaration>node).type, visitor, isTypeNode));
+
+            case SyntaxKind.EnumDeclaration:
+                return updateEnumDeclaration(<EnumDeclaration>node,
+                    nodesVisitor((<EnumDeclaration>node).decorators, visitor, isDecorator),
+                    nodesVisitor((<EnumDeclaration>node).modifiers, visitor, isModifier),
+                    visitNode((<EnumDeclaration>node).name, visitor, isIdentifier),
+                    nodesVisitor((<EnumDeclaration>node).members, visitor, isEnumMember));
+
+            case SyntaxKind.ModuleDeclaration:
+                return updateModuleDeclaration(<ModuleDeclaration>node,
+                    nodesVisitor((<ModuleDeclaration>node).decorators, visitor, isDecorator),
+                    nodesVisitor((<ModuleDeclaration>node).modifiers, visitor, isModifier),
+                    visitNode((<ModuleDeclaration>node).name, visitor, isIdentifier),
+                    visitNode((<ModuleDeclaration>node).body, visitor, isModuleBody));
+
+            case SyntaxKind.ModuleBlock:
+                return updateModuleBlock(<ModuleBlock>node,
+                    nodesVisitor((<ModuleBlock>node).statements, visitor, isStatement));
 
             case SyntaxKind.CaseBlock:
-                result = reduceLeft((<CaseBlock>node).clauses, f, result);
-                break;
+                return updateCaseBlock(<CaseBlock>node,
+                    nodesVisitor((<CaseBlock>node).clauses, visitor, isCaseOrDefaultClause));
+
+            case SyntaxKind.NamespaceExportDeclaration:
+                return updateNamespaceExportDeclaration(<NamespaceExportDeclaration>node,
+                    visitNode((<NamespaceExportDeclaration>node).name, visitor, isIdentifier));
+
+            case SyntaxKind.ImportEqualsDeclaration:
+                return updateImportEqualsDeclaration(<ImportEqualsDeclaration>node,
+                    nodesVisitor((<ImportEqualsDeclaration>node).decorators, visitor, isDecorator),
+                    nodesVisitor((<ImportEqualsDeclaration>node).modifiers, visitor, isModifier),
+                    visitNode((<ImportEqualsDeclaration>node).name, visitor, isIdentifier),
+                    visitNode((<ImportEqualsDeclaration>node).moduleReference, visitor, isModuleReference));
 
             case SyntaxKind.ImportDeclaration:
-                result = reduceLeft((<ImportDeclaration>node).decorators, f, result);
-                result = reduceLeft((<ImportDeclaration>node).modifiers, f, result);
-                result = reduceNode((<ImportDeclaration>node).importClause, f, result);
-                result = reduceNode((<ImportDeclaration>node).moduleSpecifier, f, result);
-                break;
+                return updateImportDeclaration(<ImportDeclaration>node,
+                    nodesVisitor((<ImportDeclaration>node).decorators, visitor, isDecorator),
+                    nodesVisitor((<ImportDeclaration>node).modifiers, visitor, isModifier),
+                    visitNode((<ImportDeclaration>node).importClause, visitor, isImportClause),
+                    visitNode((<ImportDeclaration>node).moduleSpecifier, visitor, isExpression));
 
             case SyntaxKind.ImportClause:
-                result = reduceNode((<ImportClause>node).name, f, result);
-                result = reduceNode((<ImportClause>node).namedBindings, f, result);
-                break;
+                return updateImportClause(<ImportClause>node,
+                    visitNode((<ImportClause>node).name, visitor, isIdentifier),
+                    visitNode((<ImportClause>node).namedBindings, visitor, isNamedImportBindings));
 
             case SyntaxKind.NamespaceImport:
-                result = reduceNode((<NamespaceImport>node).name, f, result);
-                break;
+                return updateNamespaceImport(<NamespaceImport>node,
+                    visitNode((<NamespaceImport>node).name, visitor, isIdentifier));
 
             case SyntaxKind.NamedImports:
-            case SyntaxKind.NamedExports:
-                result = reduceLeft((<NamedImports | NamedExports>node).elements, f, result);
-                break;
+                return updateNamedImports(<NamedImports>node,
+                    nodesVisitor((<NamedImports>node).elements, visitor, isImportSpecifier));
 
             case SyntaxKind.ImportSpecifier:
-            case SyntaxKind.ExportSpecifier:
-                result = reduceNode((<ImportSpecifier | ExportSpecifier>node).propertyName, f, result);
-                result = reduceNode((<ImportSpecifier | ExportSpecifier>node).name, f, result);
-                break;
+                return updateImportSpecifier(<ImportSpecifier>node,
+                    visitNode((<ImportSpecifier>node).propertyName, visitor, isIdentifier),
+                    visitNode((<ImportSpecifier>node).name, visitor, isIdentifier));
 
             case SyntaxKind.ExportAssignment:
-                result = reduceLeft((<ExportAssignment>node).decorators, f, result);
-                result = reduceLeft((<ExportAssignment>node).modifiers, f, result);
-                result = reduceNode((<ExportAssignment>node).expression, f, result);
-                break;
+                return updateExportAssignment(<ExportAssignment>node,
+                    nodesVisitor((<ExportAssignment>node).decorators, visitor, isDecorator),
+                    nodesVisitor((<ExportAssignment>node).modifiers, visitor, isModifier),
+                    visitNode((<ExportAssignment>node).expression, visitor, isExpression));
 
             case SyntaxKind.ExportDeclaration:
-                result = reduceLeft((<ExportDeclaration>node).decorators, f, result);
-                result = reduceLeft((<ExportDeclaration>node).modifiers, f, result);
-                result = reduceNode((<ExportDeclaration>node).exportClause, f, result);
-                result = reduceNode((<ExportDeclaration>node).moduleSpecifier, f, result);
-                break;
+                return updateExportDeclaration(<ExportDeclaration>node,
+                    nodesVisitor((<ExportDeclaration>node).decorators, visitor, isDecorator),
+                    nodesVisitor((<ExportDeclaration>node).modifiers, visitor, isModifier),
+                    visitNode((<ExportDeclaration>node).exportClause, visitor, isNamedExports),
+                    visitNode((<ExportDeclaration>node).moduleSpecifier, visitor, isExpression));
+
+            case SyntaxKind.NamedExports:
+                return updateNamedExports(<NamedExports>node,
+                    nodesVisitor((<NamedExports>node).elements, visitor, isExportSpecifier));
+
+            case SyntaxKind.ExportSpecifier:
+                return updateExportSpecifier(<ExportSpecifier>node,
+                    visitNode((<ExportSpecifier>node).propertyName, visitor, isIdentifier),
+                    visitNode((<ExportSpecifier>node).name, visitor, isIdentifier));
+
+            // Module references
+
+            case SyntaxKind.ExternalModuleReference:
+                return updateExternalModuleReference(<ExternalModuleReference>node,
+                    visitNode((<ExternalModuleReference>node).expression, visitor, isExpression));
 
             // JSX
+
             case SyntaxKind.JsxElement:
-                result = reduceNode((<JsxElement>node).openingElement, f, result);
-                result = reduceLeft((<JsxElement>node).children, f, result);
-                result = reduceNode((<JsxElement>node).closingElement, f, result);
-                break;
+                return updateJsxElement(<JsxElement>node,
+                    visitNode((<JsxElement>node).openingElement, visitor, isJsxOpeningElement),
+                    nodesVisitor((<JsxElement>node).children, visitor, isJsxChild),
+                    visitNode((<JsxElement>node).closingElement, visitor, isJsxClosingElement));
 
             case SyntaxKind.JsxSelfClosingElement:
+                return updateJsxSelfClosingElement(<JsxSelfClosingElement>node,
+                    visitNode((<JsxSelfClosingElement>node).tagName, visitor, isJsxTagNameExpression),
+                    visitNode((<JsxSelfClosingElement>node).attributes, visitor, isJsxAttributes));
+
             case SyntaxKind.JsxOpeningElement:
-                result = reduceNode((<JsxSelfClosingElement | JsxOpeningElement>node).tagName, f, result);
-                result = reduceLeft((<JsxSelfClosingElement | JsxOpeningElement>node).attributes, f, result);
-                break;
+                return updateJsxOpeningElement(<JsxOpeningElement>node,
+                    visitNode((<JsxOpeningElement>node).tagName, visitor, isJsxTagNameExpression),
+                    visitNode((<JsxOpeningElement>node).attributes, visitor, isJsxAttributes));
 
             case SyntaxKind.JsxClosingElement:
-                result = reduceNode((<JsxClosingElement>node).tagName, f, result);
-                break;
+                return updateJsxClosingElement(<JsxClosingElement>node,
+                    visitNode((<JsxClosingElement>node).tagName, visitor, isJsxTagNameExpression));
 
             case SyntaxKind.JsxAttribute:
-                result = reduceNode((<JsxAttribute>node).name, f, result);
-                result = reduceNode((<JsxAttribute>node).initializer, f, result);
-                break;
+                return updateJsxAttribute(<JsxAttribute>node,
+                    visitNode((<JsxAttribute>node).name, visitor, isIdentifier),
+                    visitNode((<JsxAttribute>node).initializer, visitor, isStringLiteralOrJsxExpression));
+
+            case SyntaxKind.JsxAttributes:
+                return updateJsxAttributes(<JsxAttributes>node,
+                    nodesVisitor((<JsxAttributes>node).properties, visitor, isJsxAttributeLike));
 
             case SyntaxKind.JsxSpreadAttribute:
-                result = reduceNode((<JsxSpreadAttribute>node).expression, f, result);
-                break;
+                return updateJsxSpreadAttribute(<JsxSpreadAttribute>node,
+                    visitNode((<JsxSpreadAttribute>node).expression, visitor, isExpression));
 
             case SyntaxKind.JsxExpression:
-                result = reduceNode((<JsxExpression>node).expression, f, result);
-                break;
+                return updateJsxExpression(<JsxExpression>node,
+                    visitNode((<JsxExpression>node).expression, visitor, isExpression));
 
             // Clauses
+
             case SyntaxKind.CaseClause:
-                result = reduceNode((<CaseClause>node).expression, f, result);
-                // fall-through
+                return updateCaseClause(<CaseClause>node,
+                    visitNode((<CaseClause>node).expression, visitor, isExpression),
+                    nodesVisitor((<CaseClause>node).statements, visitor, isStatement));
 
             case SyntaxKind.DefaultClause:
-                result = reduceLeft((<CaseClause | DefaultClause>node).statements, f, result);
-                break;
+                return updateDefaultClause(<DefaultClause>node,
+                    nodesVisitor((<DefaultClause>node).statements, visitor, isStatement));
 
             case SyntaxKind.HeritageClause:
-                result = reduceLeft((<HeritageClause>node).types, f, result);
-                break;
+                return updateHeritageClause(<HeritageClause>node,
+                    nodesVisitor((<HeritageClause>node).types, visitor, isExpressionWithTypeArguments));
 
             case SyntaxKind.CatchClause:
-                result = reduceNode((<CatchClause>node).variableDeclaration, f, result);
-                result = reduceNode((<CatchClause>node).block, f, result);
-                break;
+                return updateCatchClause(<CatchClause>node,
+                    visitNode((<CatchClause>node).variableDeclaration, visitor, isVariableDeclaration),
+                    visitNode((<CatchClause>node).block, visitor, isBlock));
 
             // Property assignments
+
             case SyntaxKind.PropertyAssignment:
-                result = reduceNode((<PropertyAssignment>node).name, f, result);
-                result = reduceNode((<PropertyAssignment>node).initializer, f, result);
-                break;
+                return updatePropertyAssignment(<PropertyAssignment>node,
+                    visitNode((<PropertyAssignment>node).name, visitor, isPropertyName),
+                    visitNode((<PropertyAssignment>node).initializer, visitor, isExpression));
 
             case SyntaxKind.ShorthandPropertyAssignment:
-                result = reduceNode((<ShorthandPropertyAssignment>node).name, f, result);
-                result = reduceNode((<ShorthandPropertyAssignment>node).objectAssignmentInitializer, f, result);
-                break;
+                return updateShorthandPropertyAssignment(<ShorthandPropertyAssignment>node,
+                    visitNode((<ShorthandPropertyAssignment>node).name, visitor, isIdentifier),
+                    visitNode((<ShorthandPropertyAssignment>node).objectAssignmentInitializer, visitor, isExpression));
+
+            case SyntaxKind.SpreadAssignment:
+                return updateSpreadAssignment(<SpreadAssignment>node,
+                    visitNode((<SpreadAssignment>node).expression, visitor, isExpression));
+
+            // Enum
+            case SyntaxKind.EnumMember:
+                return updateEnumMember(<EnumMember>node,
+                    visitNode((<EnumMember>node).name, visitor, isPropertyName),
+                    visitNode((<EnumMember>node).initializer, visitor, isExpression));
 
             // Top-level nodes
             case SyntaxKind.SourceFile:
-                result = reduceLeft((<SourceFile>node).statements, f, result);
-                break;
+                return updateSourceFileNode(<SourceFile>node,
+                    visitLexicalEnvironment((<SourceFile>node).statements, visitor, context));
 
+            // Transformation nodes
             case SyntaxKind.PartiallyEmittedExpression:
-                result = reduceNode((<PartiallyEmittedExpression>node).expression, f, result);
-                break;
+                return updatePartiallyEmittedExpression(<PartiallyEmittedExpression>node,
+                    visitNode((<PartiallyEmittedExpression>node).expression, visitor, isExpression));
+
+            case SyntaxKind.CommaListExpression:
+                return updateCommaList(<CommaListExpression>node,
+                    nodesVisitor((<CommaListExpression>node).elements, visitor, isExpression));
 
             default:
-                const edgeTraversalPath = nodeEdgeTraversalMap[kind];
-                if (edgeTraversalPath) {
-                    for (const edge of edgeTraversalPath) {
-                        const value = (<MapLike<any>>node)[edge.name];
-                        if (value !== undefined) {
-                            result = isArray(value)
-                                ? reduceLeft(<NodeArray<Node>>value, f, result)
-                                : f(result, <Node>value);
-                        }
-                    }
-                }
-                break;
+                // No need to visit nodes with no children.
+                return node;
         }
 
-        return result;
     }
 
     /**
-     * Visits a Node using the supplied visitor, possibly returning a new Node in its place.
+     * Extracts the single node from a NodeArray.
      *
-     * @param node The Node to visit.
-     * @param visitor The callback used to visit the Node.
-     * @param test A callback to execute to verify the Node is valid.
-     * @param optional An optional value indicating whether the Node is itself optional.
-     * @param lift An optional callback to execute to lift a NodeArrayNode into a valid Node.
+     * @param nodes The NodeArray.
      */
-    export function visitNode<T extends Node>(node: T, visitor: (node: Node) => VisitResult<Node>, test: (node: Node) => boolean, optional?: boolean, lift?: (node: NodeArray<Node>) => T): T;
-    export function visitNode<T extends Node>(node: T, visitor: (node: Node) => VisitResult<Node>, test: (node: Node) => boolean, optional: boolean, lift: (node: NodeArray<Node>) => T, parenthesize: (node: Node, parentNode: Node) => Node, parentNode: Node): T;
-    export function visitNode(node: Node, visitor: (node: Node) => VisitResult<Node>, test: (node: Node) => boolean, optional?: boolean, lift?: (node: Node[]) => Node, parenthesize?: (node: Node, parentNode: Node) => Node, parentNode?: Node): Node {
-        if (node === undefined) {
-            return undefined;
-        }
-
-        const visited = visitor(node);
-        if (visited === node) {
-            return node;
-        }
-
-        let visitedNode: Node;
-        if (visited === undefined) {
-            if (!optional) {
-                Debug.failNotOptional();
-            }
-
-            return undefined;
-        }
-        else if (isArray(visited)) {
-            visitedNode = (lift || extractSingleNode)(visited);
-        }
-        else {
-            visitedNode = visited;
-        }
-
-        if (parenthesize !== undefined) {
-            visitedNode = parenthesize(visitedNode, parentNode);
-        }
-
-        Debug.assertNode(visitedNode, test);
-        aggregateTransformFlags(visitedNode);
-        return visitedNode;
+    function extractSingleNode(nodes: Node[]): Node {
+        Debug.assert(nodes.length <= 1, "Too many nodes written to output.");
+        return singleOrUndefined(nodes);
     }
+}
 
-    /**
-     * Visits a NodeArray using the supplied visitor, possibly returning a new NodeArray in its place.
-     *
-     * @param nodes The NodeArray to visit.
-     * @param visitor The callback used to visit a Node.
-     * @param test A node test to execute for each node.
-     * @param start An optional value indicating the starting offset at which to start visiting.
-     * @param count An optional value indicating the maximum number of nodes to visit.
-     */
-    export function visitNodes<T extends Node>(nodes: NodeArray<T>, visitor: (node: Node) => VisitResult<Node>, test: (node: Node) => boolean, start?: number, count?: number): NodeArray<T>;
-    export function visitNodes<T extends Node>(nodes: NodeArray<T>, visitor: (node: Node) => VisitResult<Node>, test: (node: Node) => boolean, start: number, count: number, parenthesize: (node: Node, parentNode: Node) => Node, parentNode: Node): NodeArray<T>;
-    export function visitNodes(nodes: NodeArray<Node>, visitor: (node: Node) => VisitResult<Node>, test: (node: Node) => boolean, start?: number, count?: number, parenthesize?: (node: Node, parentNode: Node) => Node, parentNode?: Node): NodeArray<Node> {
-        if (nodes === undefined) {
-            return undefined;
-        }
-
-        let updated: NodeArray<Node>;
-
-        // Ensure start and count have valid values
-        const length = nodes.length;
-        if (start === undefined || start < 0) {
-            start = 0;
-        }
-
-        if (count === undefined || count > length - start) {
-            count = length - start;
-        }
-
-        if (start > 0 || count < length) {
-            // If we are not visiting all of the original nodes, we must always create a new array.
-            // Since this is a fragment of a node array, we do not copy over the previous location
-            // and will only copy over `hasTrailingComma` if we are including the last element.
-            updated = createNodeArray<Node>([], /*location*/ undefined,
-                /*hasTrailingComma*/ nodes.hasTrailingComma && start + count === length);
-        }
-
-        // Visit each original node.
-        for (let i = 0; i < count; i++) {
-            const node = nodes[i + start];
-            const visited = node !== undefined ? visitor(node) : undefined;
-            if (updated !== undefined || visited === undefined || visited !== node) {
-                if (updated === undefined) {
-                    // Ensure we have a copy of `nodes`, up to the current index.
-                    updated = createNodeArray(nodes.slice(0, i), /*location*/ nodes, nodes.hasTrailingComma);
-                }
-                if (visited) {
-                    if (isArray(visited)) {
-                        for (let visitedNode of visited) {
-                            visitedNode = parenthesize
-                                ? parenthesize(visitedNode, parentNode)
-                                : visitedNode;
-                            Debug.assertNode(visitedNode, test);
-                            aggregateTransformFlags(visitedNode);
-                            updated.push(visitedNode);
-                        }
-                    }
-                    else {
-                        const visitedNode = parenthesize
-                            ? parenthesize(visited, parentNode)
-                            : visited;
-                        Debug.assertNode(visitedNode, test);
-                        aggregateTransformFlags(visitedNode);
-                        updated.push(visitedNode);
-                    }
-                }
-            }
-        }
+/* @internal */
+namespace ts {
+    function reduceNode<T>(node: Node, f: (memo: T, node: Node) => T, initial: T) {
+        return node ? f(initial, node) : initial;
+    }
 
-        return updated || nodes;
+    function reduceNodeArray<T>(nodes: NodeArray<Node>, f: (memo: T, nodes: NodeArray<Node>) => T, initial: T) {
+        return nodes ? f(initial, nodes) : initial;
     }
 
     /**
-     * Visits each child of a Node using the supplied visitor, possibly returning a new Node of the same kind in its place.
+     * Similar to `reduceLeft`, performs a reduction against each child of a node.
+     * NOTE: Unlike `forEachChild`, this does *not* visit every node.
      *
-     * @param node The Node whose children will be visited.
-     * @param visitor The callback used to visit each child.
-     * @param context A lexical environment context for the visitor.
+     * @param node The node containing the children to reduce.
+     * @param initial The initial value to supply to the reduction.
+     * @param f The callback function
      */
-    export function visitEachChild<T extends Node>(node: T, visitor: (node: Node) => VisitResult<Node>, context: LexicalEnvironment): T;
-    export function visitEachChild(node: Node, visitor: (node: Node) => VisitResult<Node>, context: LexicalEnvironment): Node {
+    export function reduceEachChild<T>(node: Node, initial: T, cbNode: (memo: T, node: Node) => T, cbNodeArray?: (memo: T, nodes: NodeArray<Node>) => T): T {
         if (node === undefined) {
-            return undefined;
+            return initial;
         }
 
+        const reduceNodes: (nodes: NodeArray<Node>, f: ((memo: T, node: Node) => T) | ((memo: T, node: NodeArray<Node>) => T), initial: T) => T = cbNodeArray ? reduceNodeArray : reduceLeft;
+        const cbNodes = cbNodeArray || cbNode;
         const kind = node.kind;
+
         // No need to visit nodes with no children.
         if ((kind > SyntaxKind.FirstToken && kind <= SyntaxKind.LastToken)) {
-            return node;
+            return initial;
         }
 
         // We do not yet support types.
         if ((kind >= SyntaxKind.TypePredicate && kind <= SyntaxKind.LiteralType)) {
-            return node;
+            return initial;
         }
 
+        let result = initial;
         switch (node.kind) {
+            // Leaf nodes
             case SyntaxKind.SemicolonClassElement:
             case SyntaxKind.EmptyStatement:
             case SyntaxKind.OmittedExpression:
             case SyntaxKind.DebuggerStatement:
+            case SyntaxKind.NotEmittedStatement:
                 // No need to visit nodes with no children.
-                return node;
+                break;
 
             // Names
+            case SyntaxKind.QualifiedName:
+                result = reduceNode((<QualifiedName>node).left, cbNode, result);
+                result = reduceNode((<QualifiedName>node).right, cbNode, result);
+                break;
+
             case SyntaxKind.ComputedPropertyName:
-                return updateComputedPropertyName(<ComputedPropertyName>node,
-                    visitNode((<ComputedPropertyName>node).expression, visitor, isExpression));
+                result = reduceNode((<ComputedPropertyName>node).expression, cbNode, result);
+                break;
 
             // Signature elements
             case SyntaxKind.Parameter:
-                return updateParameterDeclaration(<ParameterDeclaration>node,
-                    visitNodes((<ParameterDeclaration>node).decorators, visitor, isDecorator),
-                    visitNodes((<ParameterDeclaration>node).modifiers, visitor, isModifier),
-                    visitNode((<ParameterDeclaration>node).name, visitor, isBindingName),
-                    visitNode((<ParameterDeclaration>node).type, visitor, isTypeNode, /*optional*/ true),
-                    visitNode((<ParameterDeclaration>node).initializer, visitor, isExpression, /*optional*/ true));
+                result = reduceNodes((<ParameterDeclaration>node).decorators, cbNodes, result);
+                result = reduceNodes((<ParameterDeclaration>node).modifiers, cbNodes, result);
+                result = reduceNode((<ParameterDeclaration>node).name, cbNode, result);
+                result = reduceNode((<ParameterDeclaration>node).type, cbNode, result);
+                result = reduceNode((<ParameterDeclaration>node).initializer, cbNode, result);
+                break;
+
+            case SyntaxKind.Decorator:
+                result = reduceNode((<Decorator>node).expression, cbNode, result);
+                break;
 
             // Type member
+
+            case SyntaxKind.PropertySignature:
+                result = reduceNodes((<PropertySignature>node).modifiers, cbNodes, result);
+                result = reduceNode((<PropertySignature>node).name, cbNode, result);
+                result = reduceNode((<PropertySignature>node).questionToken, cbNode, result);
+                result = reduceNode((<PropertySignature>node).type, cbNode, result);
+                result = reduceNode((<PropertySignature>node).initializer, cbNode, result);
+                break;
+
             case SyntaxKind.PropertyDeclaration:
-                return updateProperty(<PropertyDeclaration>node,
-                    visitNodes((<PropertyDeclaration>node).decorators, visitor, isDecorator),
-                    visitNodes((<PropertyDeclaration>node).modifiers, visitor, isModifier),
-                    visitNode((<PropertyDeclaration>node).name, visitor, isPropertyName),
-                    visitNode((<PropertyDeclaration>node).type, visitor, isTypeNode, /*optional*/ true),
-                    visitNode((<PropertyDeclaration>node).initializer, visitor, isExpression, /*optional*/ true));
+                result = reduceNodes((<PropertyDeclaration>node).decorators, cbNodes, result);
+                result = reduceNodes((<PropertyDeclaration>node).modifiers, cbNodes, result);
+                result = reduceNode((<PropertyDeclaration>node).name, cbNode, result);
+                result = reduceNode((<PropertyDeclaration>node).type, cbNode, result);
+                result = reduceNode((<PropertyDeclaration>node).initializer, cbNode, result);
+                break;
 
             case SyntaxKind.MethodDeclaration:
-                return updateMethod(<MethodDeclaration>node,
-                    visitNodes((<MethodDeclaration>node).decorators, visitor, isDecorator),
-                    visitNodes((<MethodDeclaration>node).modifiers, visitor, isModifier),
-                    visitNode((<MethodDeclaration>node).name, visitor, isPropertyName),
-                    visitNodes((<MethodDeclaration>node).typeParameters, visitor, isTypeParameter),
-                    (context.startLexicalEnvironment(), visitNodes((<MethodDeclaration>node).parameters, visitor, isParameter)),
-                    visitNode((<MethodDeclaration>node).type, visitor, isTypeNode, /*optional*/ true),
-                    mergeFunctionBodyLexicalEnvironment(
-                        visitNode((<MethodDeclaration>node).body, visitor, isFunctionBody, /*optional*/ true),
-                        context.endLexicalEnvironment()));
+                result = reduceNodes((<MethodDeclaration>node).decorators, cbNodes, result);
+                result = reduceNodes((<MethodDeclaration>node).modifiers, cbNodes, result);
+                result = reduceNode((<MethodDeclaration>node).name, cbNode, result);
+                result = reduceNodes((<MethodDeclaration>node).typeParameters, cbNodes, result);
+                result = reduceNodes((<MethodDeclaration>node).parameters, cbNodes, result);
+                result = reduceNode((<MethodDeclaration>node).type, cbNode, result);
+                result = reduceNode((<MethodDeclaration>node).body, cbNode, result);
+                break;
 
             case SyntaxKind.Constructor:
-                return updateConstructor(<ConstructorDeclaration>node,
-                    visitNodes((<ConstructorDeclaration>node).decorators, visitor, isDecorator),
-                    visitNodes((<ConstructorDeclaration>node).modifiers, visitor, isModifier),
-                    (context.startLexicalEnvironment(), visitNodes((<ConstructorDeclaration>node).parameters, visitor, isParameter)),
-                    mergeFunctionBodyLexicalEnvironment(
-                        visitNode((<ConstructorDeclaration>node).body, visitor, isFunctionBody, /*optional*/ true),
-                        context.endLexicalEnvironment()));
+                result = reduceNodes((<ConstructorDeclaration>node).modifiers, cbNodes, result);
+                result = reduceNodes((<ConstructorDeclaration>node).parameters, cbNodes, result);
+                result = reduceNode((<ConstructorDeclaration>node).body, cbNode, result);
+                break;
 
             case SyntaxKind.GetAccessor:
-                return updateGetAccessor(<GetAccessorDeclaration>node,
-                    visitNodes((<GetAccessorDeclaration>node).decorators, visitor, isDecorator),
-                    visitNodes((<GetAccessorDeclaration>node).modifiers, visitor, isModifier),
-                    visitNode((<GetAccessorDeclaration>node).name, visitor, isPropertyName),
-                    (context.startLexicalEnvironment(), visitNodes((<GetAccessorDeclaration>node).parameters, visitor, isParameter)),
-                    visitNode((<GetAccessorDeclaration>node).type, visitor, isTypeNode, /*optional*/ true),
-                    mergeFunctionBodyLexicalEnvironment(
-                        visitNode((<GetAccessorDeclaration>node).body, visitor, isFunctionBody, /*optional*/ true),
-                        context.endLexicalEnvironment()));
+                result = reduceNodes((<GetAccessorDeclaration>node).decorators, cbNodes, result);
+                result = reduceNodes((<GetAccessorDeclaration>node).modifiers, cbNodes, result);
+                result = reduceNode((<GetAccessorDeclaration>node).name, cbNode, result);
+                result = reduceNodes((<GetAccessorDeclaration>node).parameters, cbNodes, result);
+                result = reduceNode((<GetAccessorDeclaration>node).type, cbNode, result);
+                result = reduceNode((<GetAccessorDeclaration>node).body, cbNode, result);
+                break;
 
             case SyntaxKind.SetAccessor:
-                return updateSetAccessor(<SetAccessorDeclaration>node,
-                    visitNodes((<SetAccessorDeclaration>node).decorators, visitor, isDecorator),
-                    visitNodes((<SetAccessorDeclaration>node).modifiers, visitor, isModifier),
-                    visitNode((<SetAccessorDeclaration>node).name, visitor, isPropertyName),
-                    (context.startLexicalEnvironment(), visitNodes((<SetAccessorDeclaration>node).parameters, visitor, isParameter)),
-                    mergeFunctionBodyLexicalEnvironment(
-                        visitNode((<SetAccessorDeclaration>node).body, visitor, isFunctionBody, /*optional*/ true),
-                        context.endLexicalEnvironment()));
+                result = reduceNodes((<GetAccessorDeclaration>node).decorators, cbNodes, result);
+                result = reduceNodes((<GetAccessorDeclaration>node).modifiers, cbNodes, result);
+                result = reduceNode((<GetAccessorDeclaration>node).name, cbNode, result);
+                result = reduceNodes((<GetAccessorDeclaration>node).parameters, cbNodes, result);
+                result = reduceNode((<GetAccessorDeclaration>node).body, cbNode, result);
+                break;
 
             // Binding patterns
             case SyntaxKind.ObjectBindingPattern:
-                return updateObjectBindingPattern(<ObjectBindingPattern>node,
-                    visitNodes((<ObjectBindingPattern>node).elements, visitor, isBindingElement));
-
             case SyntaxKind.ArrayBindingPattern:
-                return updateArrayBindingPattern(<ArrayBindingPattern>node,
-                    visitNodes((<ArrayBindingPattern>node).elements, visitor, isArrayBindingElement));
+                result = reduceNodes((<BindingPattern>node).elements, cbNodes, result);
+                break;
 
             case SyntaxKind.BindingElement:
-                return updateBindingElement(<BindingElement>node,
-                    visitNode((<BindingElement>node).propertyName, visitor, isPropertyName, /*optional*/ true),
-                    visitNode((<BindingElement>node).name, visitor, isBindingName),
-                    visitNode((<BindingElement>node).initializer, visitor, isExpression, /*optional*/ true));
+                result = reduceNode((<BindingElement>node).propertyName, cbNode, result);
+                result = reduceNode((<BindingElement>node).name, cbNode, result);
+                result = reduceNode((<BindingElement>node).initializer, cbNode, result);
+                break;
 
             // Expression
             case SyntaxKind.ArrayLiteralExpression:
-                return updateArrayLiteral(<ArrayLiteralExpression>node,
-                    visitNodes((<ArrayLiteralExpression>node).elements, visitor, isExpression));
+                result = reduceNodes((<ArrayLiteralExpression>node).elements, cbNodes, result);
+                break;
 
             case SyntaxKind.ObjectLiteralExpression:
-                return updateObjectLiteral(<ObjectLiteralExpression>node,
-                    visitNodes((<ObjectLiteralExpression>node).properties, visitor, isObjectLiteralElementLike));
+                result = reduceNodes((<ObjectLiteralExpression>node).properties, cbNodes, result);
+                break;
 
             case SyntaxKind.PropertyAccessExpression:
-                return updatePropertyAccess(<PropertyAccessExpression>node,
-                    visitNode((<PropertyAccessExpression>node).expression, visitor, isExpression),
-                    visitNode((<PropertyAccessExpression>node).name, visitor, isIdentifier));
+                result = reduceNode((<PropertyAccessExpression>node).expression, cbNode, result);
+                result = reduceNode((<PropertyAccessExpression>node).name, cbNode, result);
+                break;
 
             case SyntaxKind.ElementAccessExpression:
-                return updateElementAccess(<ElementAccessExpression>node,
-                    visitNode((<ElementAccessExpression>node).expression, visitor, isExpression),
-                    visitNode((<ElementAccessExpression>node).argumentExpression, visitor, isExpression));
+                result = reduceNode((<ElementAccessExpression>node).expression, cbNode, result);
+                result = reduceNode((<ElementAccessExpression>node).argumentExpression, cbNode, result);
+                break;
 
             case SyntaxKind.CallExpression:
-                return updateCall(<CallExpression>node,
-                    visitNode((<CallExpression>node).expression, visitor, isExpression),
-                    visitNodes((<CallExpression>node).typeArguments, visitor, isTypeNode),
-                    visitNodes((<CallExpression>node).arguments, visitor, isExpression));
+                result = reduceNode((<CallExpression>node).expression, cbNode, result);
+                result = reduceNodes((<CallExpression>node).typeArguments, cbNodes, result);
+                result = reduceNodes((<CallExpression>node).arguments, cbNodes, result);
+                break;
 
             case SyntaxKind.NewExpression:
-                return updateNew(<NewExpression>node,
-                    visitNode((<NewExpression>node).expression, visitor, isExpression),
-                    visitNodes((<NewExpression>node).typeArguments, visitor, isTypeNode),
-                    visitNodes((<NewExpression>node).arguments, visitor, isExpression));
+                result = reduceNode((<NewExpression>node).expression, cbNode, result);
+                result = reduceNodes((<NewExpression>node).typeArguments, cbNodes, result);
+                result = reduceNodes((<NewExpression>node).arguments, cbNodes, result);
+                break;
 
             case SyntaxKind.TaggedTemplateExpression:
-                return updateTaggedTemplate(<TaggedTemplateExpression>node,
-                    visitNode((<TaggedTemplateExpression>node).tag, visitor, isExpression),
-                    visitNode((<TaggedTemplateExpression>node).template, visitor, isTemplate));
+                result = reduceNode((<TaggedTemplateExpression>node).tag, cbNode, result);
+                result = reduceNode((<TaggedTemplateExpression>node).template, cbNode, result);
+                break;
 
-            case SyntaxKind.ParenthesizedExpression:
-                return updateParen(<ParenthesizedExpression>node,
-                    visitNode((<ParenthesizedExpression>node).expression, visitor, isExpression));
+            case SyntaxKind.TypeAssertionExpression:
+                result = reduceNode((<TypeAssertion>node).type, cbNode, result);
+                result = reduceNode((<TypeAssertion>node).expression, cbNode, result);
+                break;
 
             case SyntaxKind.FunctionExpression:
-                return updateFunctionExpression(<FunctionExpression>node,
-                    visitNode((<FunctionExpression>node).name, visitor, isPropertyName),
-                    visitNodes((<FunctionExpression>node).typeParameters, visitor, isTypeParameter),
-                    (context.startLexicalEnvironment(), visitNodes((<FunctionExpression>node).parameters, visitor, isParameter)),
-                    visitNode((<FunctionExpression>node).type, visitor, isTypeNode, /*optional*/ true),
-                    mergeFunctionBodyLexicalEnvironment(
-                        visitNode((<FunctionExpression>node).body, visitor, isFunctionBody, /*optional*/ true),
-                        context.endLexicalEnvironment()));
+                result = reduceNodes((<FunctionExpression>node).modifiers, cbNodes, result);
+                result = reduceNode((<FunctionExpression>node).name, cbNode, result);
+                result = reduceNodes((<FunctionExpression>node).typeParameters, cbNodes, result);
+                result = reduceNodes((<FunctionExpression>node).parameters, cbNodes, result);
+                result = reduceNode((<FunctionExpression>node).type, cbNode, result);
+                result = reduceNode((<FunctionExpression>node).body, cbNode, result);
+                break;
 
             case SyntaxKind.ArrowFunction:
-                return updateArrowFunction(<ArrowFunction>node,
-                    visitNodes((<ArrowFunction>node).modifiers, visitor, isModifier),
-                    visitNodes((<ArrowFunction>node).typeParameters, visitor, isTypeParameter),
-                    (context.startLexicalEnvironment(), visitNodes((<ArrowFunction>node).parameters, visitor, isParameter)),
-                    visitNode((<ArrowFunction>node).type, visitor, isTypeNode, /*optional*/ true),
-                    mergeFunctionBodyLexicalEnvironment(
-                        visitNode((<ArrowFunction>node).body, visitor, isConciseBody, /*optional*/ true),
-                        context.endLexicalEnvironment()));
+                result = reduceNodes((<ArrowFunction>node).modifiers, cbNodes, result);
+                result = reduceNodes((<ArrowFunction>node).typeParameters, cbNodes, result);
+                result = reduceNodes((<ArrowFunction>node).parameters, cbNodes, result);
+                result = reduceNode((<ArrowFunction>node).type, cbNode, result);
+                result = reduceNode((<ArrowFunction>node).body, cbNode, result);
+                break;
 
+            case SyntaxKind.ParenthesizedExpression:
             case SyntaxKind.DeleteExpression:
-                return updateDelete(<DeleteExpression>node,
-                    visitNode((<DeleteExpression>node).expression, visitor, isExpression));
-
             case SyntaxKind.TypeOfExpression:
-                return updateTypeOf(<TypeOfExpression>node,
-                    visitNode((<TypeOfExpression>node).expression, visitor, isExpression));
-
             case SyntaxKind.VoidExpression:
-                return updateVoid(<VoidExpression>node,
-                    visitNode((<VoidExpression>node).expression, visitor, isExpression));
-
             case SyntaxKind.AwaitExpression:
-                return updateAwait(<AwaitExpression>node,
-                    visitNode((<AwaitExpression>node).expression, visitor, isExpression));
-
-            case SyntaxKind.BinaryExpression:
-                return updateBinary(<BinaryExpression>node,
-                    visitNode((<BinaryExpression>node).left, visitor, isExpression),
-                    visitNode((<BinaryExpression>node).right, visitor, isExpression));
+            case SyntaxKind.YieldExpression:
+            case SyntaxKind.SpreadElement:
+            case SyntaxKind.NonNullExpression:
+                result = reduceNode((<ParenthesizedExpression | DeleteExpression | TypeOfExpression | VoidExpression | AwaitExpression | YieldExpression | SpreadElement | NonNullExpression>node).expression, cbNode, result);
+                break;
 
             case SyntaxKind.PrefixUnaryExpression:
-                return updatePrefix(<PrefixUnaryExpression>node,
-                    visitNode((<PrefixUnaryExpression>node).operand, visitor, isExpression));
-
             case SyntaxKind.PostfixUnaryExpression:
-                return updatePostfix(<PostfixUnaryExpression>node,
-                    visitNode((<PostfixUnaryExpression>node).operand, visitor, isExpression));
+                result = reduceNode((<PrefixUnaryExpression | PostfixUnaryExpression>node).operand, cbNode, result);
+                break;
+
+            case SyntaxKind.BinaryExpression:
+                result = reduceNode((<BinaryExpression>node).left, cbNode, result);
+                result = reduceNode((<BinaryExpression>node).right, cbNode, result);
+                break;
 
             case SyntaxKind.ConditionalExpression:
-                return updateConditional(<ConditionalExpression>node,
-                    visitNode((<ConditionalExpression>node).condition, visitor, isExpression),
-                    visitNode((<ConditionalExpression>node).whenTrue, visitor, isExpression),
-                    visitNode((<ConditionalExpression>node).whenFalse, visitor, isExpression));
+                result = reduceNode((<ConditionalExpression>node).condition, cbNode, result);
+                result = reduceNode((<ConditionalExpression>node).whenTrue, cbNode, result);
+                result = reduceNode((<ConditionalExpression>node).whenFalse, cbNode, result);
+                break;
 
             case SyntaxKind.TemplateExpression:
-                return updateTemplateExpression(<TemplateExpression>node,
-                    visitNode((<TemplateExpression>node).head, visitor, isTemplateLiteralFragment),
-                    visitNodes((<TemplateExpression>node).templateSpans, visitor, isTemplateSpan));
-
-            case SyntaxKind.YieldExpression:
-                return updateYield(<YieldExpression>node,
-                    visitNode((<YieldExpression>node).expression, visitor, isExpression));
-
-            case SyntaxKind.SpreadElementExpression:
-                return updateSpread(<SpreadElementExpression>node,
-                    visitNode((<SpreadElementExpression>node).expression, visitor, isExpression));
+                result = reduceNode((<TemplateExpression>node).head, cbNode, result);
+                result = reduceNodes((<TemplateExpression>node).templateSpans, cbNodes, result);
+                break;
 
             case SyntaxKind.ClassExpression:
-                return updateClassExpression(<ClassExpression>node,
-                    visitNodes((<ClassExpression>node).modifiers, visitor, isModifier),
-                    visitNode((<ClassExpression>node).name, visitor, isIdentifier, /*optional*/ true),
-                    visitNodes((<ClassExpression>node).typeParameters, visitor, isTypeParameter),
-                    visitNodes((<ClassExpression>node).heritageClauses, visitor, isHeritageClause),
-                    visitNodes((<ClassExpression>node).members, visitor, isClassElement));
+                result = reduceNodes((<ClassExpression>node).modifiers, cbNodes, result);
+                result = reduceNode((<ClassExpression>node).name, cbNode, result);
+                result = reduceNodes((<ClassExpression>node).typeParameters, cbNodes, result);
+                result = reduceNodes((<ClassExpression>node).heritageClauses, cbNodes, result);
+                result = reduceNodes((<ClassExpression>node).members, cbNodes, result);
+                break;
 
             case SyntaxKind.ExpressionWithTypeArguments:
-                return updateExpressionWithTypeArguments(<ExpressionWithTypeArguments>node,
-                    visitNodes((<ExpressionWithTypeArguments>node).typeArguments, visitor, isTypeNode),
-                    visitNode((<ExpressionWithTypeArguments>node).expression, visitor, isExpression));
+                result = reduceNode((<ExpressionWithTypeArguments>node).expression, cbNode, result);
+                result = reduceNodes((<ExpressionWithTypeArguments>node).typeArguments, cbNodes, result);
+                break;
+
+            case SyntaxKind.AsExpression:
+                result = reduceNode((<AsExpression>node).expression, cbNode, result);
+                result = reduceNode((<AsExpression>node).type, cbNode, result);
+                break;
+
+            case SyntaxKind.NonNullExpression:
+                result = reduceNode((<NonNullExpression>node).expression, cbNode, result);
+                break;
 
             // Misc
             case SyntaxKind.TemplateSpan:
-                return updateTemplateSpan(<TemplateSpan>node,
-                    visitNode((<TemplateSpan>node).expression, visitor, isExpression),
-                    visitNode((<TemplateSpan>node).literal, visitor, isTemplateLiteralFragment));
+                result = reduceNode((<TemplateSpan>node).expression, cbNode, result);
+                result = reduceNode((<TemplateSpan>node).literal, cbNode, result);
+                break;
 
             // Element
             case SyntaxKind.Block:
-                return updateBlock(<Block>node,
-                    visitNodes((<Block>node).statements, visitor, isStatement));
+                result = reduceNodes((<Block>node).statements, cbNodes, result);
+                break;
 
             case SyntaxKind.VariableStatement:
-                return updateVariableStatement(<VariableStatement>node,
-                    visitNodes((<VariableStatement>node).modifiers, visitor, isModifier),
-                    visitNode((<VariableStatement>node).declarationList, visitor, isVariableDeclarationList));
+                result = reduceNodes((<VariableStatement>node).modifiers, cbNodes, result);
+                result = reduceNode((<VariableStatement>node).declarationList, cbNode, result);
+                break;
 
             case SyntaxKind.ExpressionStatement:
-                return updateStatement(<ExpressionStatement>node,
-                    visitNode((<ExpressionStatement>node).expression, visitor, isExpression));
+                result = reduceNode((<ExpressionStatement>node).expression, cbNode, result);
+                break;
 
             case SyntaxKind.IfStatement:
-                return updateIf(<IfStatement>node,
-                    visitNode((<IfStatement>node).expression, visitor, isExpression),
-                    visitNode((<IfStatement>node).thenStatement, visitor, isStatement, /*optional*/ false, liftToBlock),
-                    visitNode((<IfStatement>node).elseStatement, visitor, isStatement, /*optional*/ true, liftToBlock));
+                result = reduceNode((<IfStatement>node).expression, cbNode, result);
+                result = reduceNode((<IfStatement>node).thenStatement, cbNode, result);
+                result = reduceNode((<IfStatement>node).elseStatement, cbNode, result);
+                break;
 
             case SyntaxKind.DoStatement:
-                return updateDo(<DoStatement>node,
-                    visitNode((<DoStatement>node).statement, visitor, isStatement, /*optional*/ false, liftToBlock),
-                    visitNode((<DoStatement>node).expression, visitor, isExpression));
+                result = reduceNode((<DoStatement>node).statement, cbNode, result);
+                result = reduceNode((<DoStatement>node).expression, cbNode, result);
+                break;
 
             case SyntaxKind.WhileStatement:
-                return updateWhile(<WhileStatement>node,
-                    visitNode((<WhileStatement>node).expression, visitor, isExpression),
-                    visitNode((<WhileStatement>node).statement, visitor, isStatement, /*optional*/ false, liftToBlock));
+            case SyntaxKind.WithStatement:
+                result = reduceNode((<WhileStatement | WithStatement>node).expression, cbNode, result);
+                result = reduceNode((<WhileStatement | WithStatement>node).statement, cbNode, result);
+                break;
 
             case SyntaxKind.ForStatement:
-                return updateFor(<ForStatement>node,
-                    visitNode((<ForStatement>node).initializer, visitor, isForInitializer),
-                    visitNode((<ForStatement>node).condition, visitor, isExpression),
-                    visitNode((<ForStatement>node).incrementor, visitor, isExpression),
-                    visitNode((<ForStatement>node).statement, visitor, isStatement, /*optional*/ false, liftToBlock));
+                result = reduceNode((<ForStatement>node).initializer, cbNode, result);
+                result = reduceNode((<ForStatement>node).condition, cbNode, result);
+                result = reduceNode((<ForStatement>node).incrementor, cbNode, result);
+                result = reduceNode((<ForStatement>node).statement, cbNode, result);
+                break;
 
             case SyntaxKind.ForInStatement:
-                return updateForIn(<ForInStatement>node,
-                    visitNode((<ForInStatement>node).initializer, visitor, isForInitializer),
-                    visitNode((<ForInStatement>node).expression, visitor, isExpression),
-                    visitNode((<ForInStatement>node).statement, visitor, isStatement, /*optional*/ false, liftToBlock));
-
             case SyntaxKind.ForOfStatement:
-                return updateForOf(<ForOfStatement>node,
-                    visitNode((<ForOfStatement>node).initializer, visitor, isForInitializer),
-                    visitNode((<ForOfStatement>node).expression, visitor, isExpression),
-                    visitNode((<ForOfStatement>node).statement, visitor, isStatement, /*optional*/ false, liftToBlock));
-
-            case SyntaxKind.ContinueStatement:
-                return updateContinue(<ContinueStatement>node,
-                    visitNode((<ContinueStatement>node).label, visitor, isIdentifier, /*optional*/ true));
-
-            case SyntaxKind.BreakStatement:
-                return updateBreak(<BreakStatement>node,
-                    visitNode((<BreakStatement>node).label, visitor, isIdentifier, /*optional*/ true));
+                result = reduceNode((<ForInOrOfStatement>node).initializer, cbNode, result);
+                result = reduceNode((<ForInOrOfStatement>node).expression, cbNode, result);
+                result = reduceNode((<ForInOrOfStatement>node).statement, cbNode, result);
+                break;
 
             case SyntaxKind.ReturnStatement:
-                return updateReturn(<ReturnStatement>node,
-                    visitNode((<ReturnStatement>node).expression, visitor, isExpression, /*optional*/ true));
-
-            case SyntaxKind.WithStatement:
-                return updateWith(<WithStatement>node,
-                    visitNode((<WithStatement>node).expression, visitor, isExpression),
-                    visitNode((<WithStatement>node).statement, visitor, isStatement, /*optional*/ false, liftToBlock));
+            case SyntaxKind.ThrowStatement:
+                result = reduceNode((<ReturnStatement>node).expression, cbNode, result);
+                break;
 
             case SyntaxKind.SwitchStatement:
-                return updateSwitch(<SwitchStatement>node,
-                    visitNode((<SwitchStatement>node).expression, visitor, isExpression),
-                    visitNode((<SwitchStatement>node).caseBlock, visitor, isCaseBlock));
+                result = reduceNode((<SwitchStatement>node).expression, cbNode, result);
+                result = reduceNode((<SwitchStatement>node).caseBlock, cbNode, result);
+                break;
 
             case SyntaxKind.LabeledStatement:
-                return updateLabel(<LabeledStatement>node,
-                    visitNode((<LabeledStatement>node).label, visitor, isIdentifier),
-                    visitNode((<LabeledStatement>node).statement, visitor, isStatement, /*optional*/ false, liftToBlock));
-
-            case SyntaxKind.ThrowStatement:
-                return updateThrow(<ThrowStatement>node,
-                    visitNode((<ThrowStatement>node).expression, visitor, isExpression));
+                result = reduceNode((<LabeledStatement>node).label, cbNode, result);
+                result = reduceNode((<LabeledStatement>node).statement, cbNode, result);
+                break;
 
             case SyntaxKind.TryStatement:
-                return updateTry(<TryStatement>node,
-                    visitNode((<TryStatement>node).tryBlock, visitor, isBlock),
-                    visitNode((<TryStatement>node).catchClause, visitor, isCatchClause, /*optional*/ true),
-                    visitNode((<TryStatement>node).finallyBlock, visitor, isBlock, /*optional*/ true));
+                result = reduceNode((<TryStatement>node).tryBlock, cbNode, result);
+                result = reduceNode((<TryStatement>node).catchClause, cbNode, result);
+                result = reduceNode((<TryStatement>node).finallyBlock, cbNode, result);
+                break;
 
             case SyntaxKind.VariableDeclaration:
-                return updateVariableDeclaration(<VariableDeclaration>node,
-                    visitNode((<VariableDeclaration>node).name, visitor, isBindingName),
-                    visitNode((<VariableDeclaration>node).type, visitor, isTypeNode, /*optional*/ true),
-                    visitNode((<VariableDeclaration>node).initializer, visitor, isExpression, /*optional*/ true));
+                result = reduceNode((<VariableDeclaration>node).name, cbNode, result);
+                result = reduceNode((<VariableDeclaration>node).type, cbNode, result);
+                result = reduceNode((<VariableDeclaration>node).initializer, cbNode, result);
+                break;
 
             case SyntaxKind.VariableDeclarationList:
-                return updateVariableDeclarationList(<VariableDeclarationList>node,
-                    visitNodes((<VariableDeclarationList>node).declarations, visitor, isVariableDeclaration));
+                result = reduceNodes((<VariableDeclarationList>node).declarations, cbNodes, result);
+                break;
 
             case SyntaxKind.FunctionDeclaration:
-                return updateFunctionDeclaration(<FunctionDeclaration>node,
-                    visitNodes((<FunctionDeclaration>node).decorators, visitor, isDecorator),
-                    visitNodes((<FunctionDeclaration>node).modifiers, visitor, isModifier),
-                    visitNode((<FunctionDeclaration>node).name, visitor, isPropertyName),
-                    visitNodes((<FunctionDeclaration>node).typeParameters, visitor, isTypeParameter),
-                    (context.startLexicalEnvironment(), visitNodes((<FunctionDeclaration>node).parameters, visitor, isParameter)),
-                    visitNode((<FunctionDeclaration>node).type, visitor, isTypeNode, /*optional*/ true),
-                    mergeFunctionBodyLexicalEnvironment(
-                        visitNode((<FunctionDeclaration>node).body, visitor, isFunctionBody, /*optional*/ true),
-                        context.endLexicalEnvironment()));
+                result = reduceNodes((<FunctionDeclaration>node).decorators, cbNodes, result);
+                result = reduceNodes((<FunctionDeclaration>node).modifiers, cbNodes, result);
+                result = reduceNode((<FunctionDeclaration>node).name, cbNode, result);
+                result = reduceNodes((<FunctionDeclaration>node).typeParameters, cbNodes, result);
+                result = reduceNodes((<FunctionDeclaration>node).parameters, cbNodes, result);
+                result = reduceNode((<FunctionDeclaration>node).type, cbNode, result);
+                result = reduceNode((<FunctionDeclaration>node).body, cbNode, result);
+                break;
 
             case SyntaxKind.ClassDeclaration:
-                return updateClassDeclaration(<ClassDeclaration>node,
-                    visitNodes((<ClassDeclaration>node).decorators, visitor, isDecorator),
-                    visitNodes((<ClassDeclaration>node).modifiers, visitor, isModifier),
-                    visitNode((<ClassDeclaration>node).name, visitor, isIdentifier, /*optional*/ true),
-                    visitNodes((<ClassDeclaration>node).typeParameters, visitor, isTypeParameter),
-                    visitNodes((<ClassDeclaration>node).heritageClauses, visitor, isHeritageClause),
-                    visitNodes((<ClassDeclaration>node).members, visitor, isClassElement));
+                result = reduceNodes((<ClassDeclaration>node).decorators, cbNodes, result);
+                result = reduceNodes((<ClassDeclaration>node).modifiers, cbNodes, result);
+                result = reduceNode((<ClassDeclaration>node).name, cbNode, result);
+                result = reduceNodes((<ClassDeclaration>node).typeParameters, cbNodes, result);
+                result = reduceNodes((<ClassDeclaration>node).heritageClauses, cbNodes, result);
+                result = reduceNodes((<ClassDeclaration>node).members, cbNodes, result);
+                break;
+
+            case SyntaxKind.EnumDeclaration:
+                result = reduceNodes((<EnumDeclaration>node).decorators, cbNodes, result);
+                result = reduceNodes((<EnumDeclaration>node).modifiers, cbNodes, result);
+                result = reduceNode((<EnumDeclaration>node).name, cbNode, result);
+                result = reduceNodes((<EnumDeclaration>node).members, cbNodes, result);
+                break;
+
+            case SyntaxKind.ModuleDeclaration:
+                result = reduceNodes((<ModuleDeclaration>node).decorators, cbNodes, result);
+                result = reduceNodes((<ModuleDeclaration>node).modifiers, cbNodes, result);
+                result = reduceNode((<ModuleDeclaration>node).name, cbNode, result);
+                result = reduceNode((<ModuleDeclaration>node).body, cbNode, result);
+                break;
+
+            case SyntaxKind.ModuleBlock:
+                result = reduceNodes((<ModuleBlock>node).statements, cbNodes, result);
+                break;
 
             case SyntaxKind.CaseBlock:
-                return updateCaseBlock(<CaseBlock>node,
-                    visitNodes((<CaseBlock>node).clauses, visitor, isCaseOrDefaultClause));
+                result = reduceNodes((<CaseBlock>node).clauses, cbNodes, result);
+                break;
+
+            case SyntaxKind.ImportEqualsDeclaration:
+                result = reduceNodes((<ImportEqualsDeclaration>node).decorators, cbNodes, result);
+                result = reduceNodes((<ImportEqualsDeclaration>node).modifiers, cbNodes, result);
+                result = reduceNode((<ImportEqualsDeclaration>node).name, cbNode, result);
+                result = reduceNode((<ImportEqualsDeclaration>node).moduleReference, cbNode, result);
+                break;
 
             case SyntaxKind.ImportDeclaration:
-                return updateImportDeclaration(<ImportDeclaration>node,
-                    visitNodes((<ImportDeclaration>node).decorators, visitor, isDecorator),
-                    visitNodes((<ImportDeclaration>node).modifiers, visitor, isModifier),
-                    visitNode((<ImportDeclaration>node).importClause, visitor, isImportClause, /*optional*/ true),
-                    visitNode((<ImportDeclaration>node).moduleSpecifier, visitor, isExpression));
+                result = reduceNodes((<ImportDeclaration>node).decorators, cbNodes, result);
+                result = reduceNodes((<ImportDeclaration>node).modifiers, cbNodes, result);
+                result = reduceNode((<ImportDeclaration>node).importClause, cbNode, result);
+                result = reduceNode((<ImportDeclaration>node).moduleSpecifier, cbNode, result);
+                break;
 
             case SyntaxKind.ImportClause:
-                return updateImportClause(<ImportClause>node,
-                    visitNode((<ImportClause>node).name, visitor, isIdentifier, /*optional*/ true),
-                    visitNode((<ImportClause>node).namedBindings, visitor, isNamedImportBindings, /*optional*/ true));
+                result = reduceNode((<ImportClause>node).name, cbNode, result);
+                result = reduceNode((<ImportClause>node).namedBindings, cbNode, result);
+                break;
 
             case SyntaxKind.NamespaceImport:
-                return updateNamespaceImport(<NamespaceImport>node,
-                    visitNode((<NamespaceImport>node).name, visitor, isIdentifier));
+                result = reduceNode((<NamespaceImport>node).name, cbNode, result);
+                break;
 
             case SyntaxKind.NamedImports:
-                return updateNamedImports(<NamedImports>node,
-                    visitNodes((<NamedImports>node).elements, visitor, isImportSpecifier));
+            case SyntaxKind.NamedExports:
+                result = reduceNodes((<NamedImports | NamedExports>node).elements, cbNodes, result);
+                break;
 
             case SyntaxKind.ImportSpecifier:
-                return updateImportSpecifier(<ImportSpecifier>node,
-                    visitNode((<ImportSpecifier>node).propertyName, visitor, isIdentifier, /*optional*/ true),
-                    visitNode((<ImportSpecifier>node).name, visitor, isIdentifier));
+            case SyntaxKind.ExportSpecifier:
+                result = reduceNode((<ImportSpecifier | ExportSpecifier>node).propertyName, cbNode, result);
+                result = reduceNode((<ImportSpecifier | ExportSpecifier>node).name, cbNode, result);
+                break;
 
             case SyntaxKind.ExportAssignment:
-                return updateExportAssignment(<ExportAssignment>node,
-                    visitNodes((<ExportAssignment>node).decorators, visitor, isDecorator),
-                    visitNodes((<ExportAssignment>node).modifiers, visitor, isModifier),
-                    visitNode((<ExportAssignment>node).expression, visitor, isExpression));
+                result = reduceLeft((<ExportAssignment>node).decorators, cbNode, result);
+                result = reduceLeft((<ExportAssignment>node).modifiers, cbNode, result);
+                result = reduceNode((<ExportAssignment>node).expression, cbNode, result);
+                break;
 
             case SyntaxKind.ExportDeclaration:
-                return updateExportDeclaration(<ExportDeclaration>node,
-                    visitNodes((<ExportDeclaration>node).decorators, visitor, isDecorator),
-                    visitNodes((<ExportDeclaration>node).modifiers, visitor, isModifier),
-                    visitNode((<ExportDeclaration>node).exportClause, visitor, isNamedExports, /*optional*/ true),
-                    visitNode((<ExportDeclaration>node).moduleSpecifier, visitor, isExpression, /*optional*/ true));
-
-            case SyntaxKind.NamedExports:
-                return updateNamedExports(<NamedExports>node,
-                    visitNodes((<NamedExports>node).elements, visitor, isExportSpecifier));
+                result = reduceLeft((<ExportDeclaration>node).decorators, cbNode, result);
+                result = reduceLeft((<ExportDeclaration>node).modifiers, cbNode, result);
+                result = reduceNode((<ExportDeclaration>node).exportClause, cbNode, result);
+                result = reduceNode((<ExportDeclaration>node).moduleSpecifier, cbNode, result);
+                break;
 
-            case SyntaxKind.ExportSpecifier:
-                return updateExportSpecifier(<ExportSpecifier>node,
-                    visitNode((<ExportSpecifier>node).propertyName, visitor, isIdentifier, /*optional*/ true),
-                    visitNode((<ExportSpecifier>node).name, visitor, isIdentifier));
+            // Module references
+            case SyntaxKind.ExternalModuleReference:
+                result = reduceNode((<ExternalModuleReference>node).expression, cbNode, result);
+                break;
 
             // JSX
             case SyntaxKind.JsxElement:
-                return updateJsxElement(<JsxElement>node,
-                    visitNode((<JsxElement>node).openingElement, visitor, isJsxOpeningElement),
-                    visitNodes((<JsxElement>node).children, visitor, isJsxChild),
-                    visitNode((<JsxElement>node).closingElement, visitor, isJsxClosingElement));
+                result = reduceNode((<JsxElement>node).openingElement, cbNode, result);
+                result = reduceLeft((<JsxElement>node).children, cbNode, result);
+                result = reduceNode((<JsxElement>node).closingElement, cbNode, result);
+                break;
 
             case SyntaxKind.JsxSelfClosingElement:
-                return updateJsxSelfClosingElement(<JsxSelfClosingElement>node,
-                    visitNode((<JsxSelfClosingElement>node).tagName, visitor, isJsxTagNameExpression),
-                    visitNodes((<JsxSelfClosingElement>node).attributes, visitor, isJsxAttributeLike));
-
             case SyntaxKind.JsxOpeningElement:
-                return updateJsxOpeningElement(<JsxOpeningElement>node,
-                    visitNode((<JsxOpeningElement>node).tagName, visitor, isJsxTagNameExpression),
-                    visitNodes((<JsxOpeningElement>node).attributes, visitor, isJsxAttributeLike));
+                result = reduceNode((<JsxSelfClosingElement | JsxOpeningElement>node).tagName, cbNode, result);
+                result = reduceNode((<JsxSelfClosingElement | JsxOpeningElement>node).attributes, cbNode, result);
+                break;
+
+            case SyntaxKind.JsxAttributes:
+                result = reduceNodes((<JsxAttributes>node).properties, cbNodes, result);
+                break;
 
             case SyntaxKind.JsxClosingElement:
-                return updateJsxClosingElement(<JsxClosingElement>node,
-                    visitNode((<JsxClosingElement>node).tagName, visitor, isJsxTagNameExpression));
+                result = reduceNode((<JsxClosingElement>node).tagName, cbNode, result);
+                break;
 
             case SyntaxKind.JsxAttribute:
-                return updateJsxAttribute(<JsxAttribute>node,
-                    visitNode((<JsxAttribute>node).name, visitor, isIdentifier),
-                    visitNode((<JsxAttribute>node).initializer, visitor, isStringLiteralOrJsxExpression));
+                result = reduceNode((<JsxAttribute>node).name, cbNode, result);
+                result = reduceNode((<JsxAttribute>node).initializer, cbNode, result);
+                break;
 
             case SyntaxKind.JsxSpreadAttribute:
-                return updateJsxSpreadAttribute(<JsxSpreadAttribute>node,
-                    visitNode((<JsxSpreadAttribute>node).expression, visitor, isExpression));
+                result = reduceNode((<JsxSpreadAttribute>node).expression, cbNode, result);
+                break;
 
             case SyntaxKind.JsxExpression:
-                return updateJsxExpression(<JsxExpression>node,
-                    visitNode((<JsxExpression>node).expression, visitor, isExpression));
+                result = reduceNode((<JsxExpression>node).expression, cbNode, result);
+                break;
 
             // Clauses
             case SyntaxKind.CaseClause:
-                return updateCaseClause(<CaseClause>node,
-                    visitNode((<CaseClause>node).expression, visitor, isExpression),
-                    visitNodes((<CaseClause>node).statements, visitor, isStatement));
+                result = reduceNode((<CaseClause>node).expression, cbNode, result);
+                // falls through
 
             case SyntaxKind.DefaultClause:
-                return updateDefaultClause(<DefaultClause>node,
-                    visitNodes((<DefaultClause>node).statements, visitor, isStatement));
+                result = reduceNodes((<CaseClause | DefaultClause>node).statements, cbNodes, result);
+                break;
 
             case SyntaxKind.HeritageClause:
-                return updateHeritageClause(<HeritageClause>node,
-                    visitNodes((<HeritageClause>node).types, visitor, isExpressionWithTypeArguments));
+                result = reduceNodes((<HeritageClause>node).types, cbNodes, result);
+                break;
 
             case SyntaxKind.CatchClause:
-                return updateCatchClause(<CatchClause>node,
-                    visitNode((<CatchClause>node).variableDeclaration, visitor, isVariableDeclaration),
-                    visitNode((<CatchClause>node).block, visitor, isBlock));
+                result = reduceNode((<CatchClause>node).variableDeclaration, cbNode, result);
+                result = reduceNode((<CatchClause>node).block, cbNode, result);
+                break;
 
             // Property assignments
             case SyntaxKind.PropertyAssignment:
-                return updatePropertyAssignment(<PropertyAssignment>node,
-                    visitNode((<PropertyAssignment>node).name, visitor, isPropertyName),
-                    visitNode((<PropertyAssignment>node).initializer, visitor, isExpression));
+                result = reduceNode((<PropertyAssignment>node).name, cbNode, result);
+                result = reduceNode((<PropertyAssignment>node).initializer, cbNode, result);
+                break;
 
             case SyntaxKind.ShorthandPropertyAssignment:
-                return updateShorthandPropertyAssignment(<ShorthandPropertyAssignment>node,
-                    visitNode((<ShorthandPropertyAssignment>node).name, visitor, isIdentifier),
-                    visitNode((<ShorthandPropertyAssignment>node).objectAssignmentInitializer, visitor, isExpression));
+                result = reduceNode((<ShorthandPropertyAssignment>node).name, cbNode, result);
+                result = reduceNode((<ShorthandPropertyAssignment>node).objectAssignmentInitializer, cbNode, result);
+                break;
+
+            case SyntaxKind.SpreadAssignment:
+                result = reduceNode((<SpreadAssignment>node).expression, cbNode, result);
+                break;
+
+            // Enum
+            case SyntaxKind.EnumMember:
+                result = reduceNode((<EnumMember>node).name, cbNode, result);
+                result = reduceNode((<EnumMember>node).initializer, cbNode, result);
+                break;
 
             // Top-level nodes
             case SyntaxKind.SourceFile:
-                context.startLexicalEnvironment();
-                return updateSourceFileNode(<SourceFile>node,
-                    createNodeArray(
-                        concatenate(
-                            visitNodes((<SourceFile>node).statements, visitor, isStatement),
-                            context.endLexicalEnvironment()),
-                        (<SourceFile>node).statements));
+                result = reduceNodes((<SourceFile>node).statements, cbNodes, result);
+                break;
 
             // Transformation nodes
             case SyntaxKind.PartiallyEmittedExpression:
-                return updatePartiallyEmittedExpression(<PartiallyEmittedExpression>node,
-                    visitNode((<PartiallyEmittedExpression>node).expression, visitor, isExpression));
+                result = reduceNode((<PartiallyEmittedExpression>node).expression, cbNode, result);
+                break;
+
+            case SyntaxKind.CommaListExpression:
+                result = reduceNodes((<CommaListExpression>node).elements, cbNodes, result);
+                break;
 
             default:
-                let updated: Node & MapLike<any>;
-                const edgeTraversalPath = nodeEdgeTraversalMap[kind];
-                if (edgeTraversalPath) {
-                    for (const edge of edgeTraversalPath) {
-                        const value = <Node | NodeArray<Node>>(<Node & Map<any>>node)[edge.name];
-                        if (value !== undefined) {
-                            const visited = isArray(value)
-                                ? visitNodes(value, visitor, edge.test, 0, value.length, edge.parenthesize, node)
-                                : visitNode(value, visitor, edge.test, edge.optional, edge.lift, edge.parenthesize, node);
-                            if (updated !== undefined || visited !== value) {
-                                if (updated === undefined) {
-                                    updated = getMutableClone(node);
-                                }
-                                if (visited !== value) {
-                                    updated[edge.name] = visited;
-                                }
-                            }
-                        }
-                    }
-                }
-                return updated ? updateNode(updated, node) : node;
+                break;
         }
 
-        // return node;
+        return result;
     }
 
     /**
-     * Merges generated lexical declarations into the FunctionBody of a non-arrow function-like declaration.
-     *
-     * @param node The ConciseBody of an arrow function.
-     * @param declarations The lexical declarations to merge.
+     * Merges generated lexical declarations into a new statement list.
      */
-    export function mergeFunctionBodyLexicalEnvironment(body: FunctionBody, declarations: Statement[]): FunctionBody;
+    export function mergeLexicalEnvironment(statements: NodeArray<Statement>, declarations: Statement[]): NodeArray<Statement>;
 
     /**
-     * Merges generated lexical declarations into the ConciseBody of an ArrowFunction.
-     *
-     * @param node The ConciseBody of an arrow function.
-     * @param declarations The lexical declarations to merge.
+     * Appends generated lexical declarations to an array of statements.
      */
-    export function mergeFunctionBodyLexicalEnvironment(body: ConciseBody, declarations: Statement[]): ConciseBody;
-
-    export function mergeFunctionBodyLexicalEnvironment(body: ConciseBody, declarations: Statement[]): ConciseBody {
-        if (body && declarations !== undefined && declarations.length > 0) {
-            if (isBlock(body)) {
-                return updateBlock(body, createNodeArray(concatenate(body.statements, declarations), body.statements));
-            }
-            else {
-                return createBlock(
-                    createNodeArray([createReturn(body, /*location*/ body), ...declarations], body),
-                    /*location*/ body,
-                    /*multiLine*/ true);
-            }
+    export function mergeLexicalEnvironment(statements: Statement[], declarations: Statement[]): Statement[];
+    export function mergeLexicalEnvironment(statements: Statement[], declarations: Statement[]) {
+        if (!some(declarations)) {
+            return statements;
         }
-        return body;
+
+        return isNodeArray(statements)
+            ? setTextRange(createNodeArray(concatenate(statements, declarations)), statements)
+            : addRange(statements, declarations);
     }
 
     /**
@@ -1207,16 +1450,6 @@ namespace ts {
         return <Statement>singleOrUndefined(nodes) || createBlock(<NodeArray<Statement>>nodes);
     }
 
-    /**
-     * Extracts the single node from a NodeArray.
-     *
-     * @param nodes The NodeArray.
-     */
-    function extractSingleNode(nodes: Node[]): Node {
-        Debug.assert(nodes.length <= 1, "Too many nodes written to output.");
-        return singleOrUndefined(nodes);
-    }
-
     /**
      * Aggregates the TransformFlags for a Node and its subtree.
      */
@@ -1236,13 +1469,25 @@ namespace ts {
         if (node === undefined) {
             return TransformFlags.None;
         }
-        else if (node.transformFlags & TransformFlags.HasComputedFlags) {
+        if (node.transformFlags & TransformFlags.HasComputedFlags) {
             return node.transformFlags & ~getTransformFlagsSubtreeExclusions(node.kind);
         }
-        else {
-            const subtreeFlags = aggregateTransformFlagsForSubtree(node);
-            return computeTransformFlagsForNode(node, subtreeFlags);
+        const subtreeFlags = aggregateTransformFlagsForSubtree(node);
+        return computeTransformFlagsForNode(node, subtreeFlags);
+    }
+
+    function aggregateTransformFlagsForNodeArray(nodes: NodeArray<Node>): TransformFlags {
+        if (nodes === undefined) {
+            return TransformFlags.None;
+        }
+        let subtreeFlags = TransformFlags.None;
+        let nodeArrayFlags = TransformFlags.None;
+        for (const node of nodes) {
+            subtreeFlags |= aggregateTransformFlagsForNode(node);
+            nodeArrayFlags |= node.transformFlags & ~TransformFlags.HasComputedFlags;
         }
+        nodes.transformFlags = nodeArrayFlags | TransformFlags.HasComputedFlags;
+        return subtreeFlags;
     }
 
     /**
@@ -1251,110 +1496,119 @@ namespace ts {
     function aggregateTransformFlagsForSubtree(node: Node): TransformFlags {
         // We do not transform ambient declarations or types, so there is no need to
         // recursively aggregate transform flags.
-        if (hasModifier(node, ModifierFlags.Ambient) || isTypeNode(node)) {
+        if (hasModifier(node, ModifierFlags.Ambient) || (isTypeNode(node) && node.kind !== SyntaxKind.ExpressionWithTypeArguments)) {
             return TransformFlags.None;
         }
 
         // Aggregate the transform flags of each child.
-        return reduceEachChild(node, aggregateTransformFlagsForChildNode, TransformFlags.None);
+        return reduceEachChild(node, TransformFlags.None, aggregateTransformFlagsForChildNode, aggregateTransformFlagsForChildNodes);
     }
 
     /**
      * Aggregates the TransformFlags of a child node with the TransformFlags of its
      * siblings.
      */
-    function aggregateTransformFlagsForChildNode(transformFlags: TransformFlags, child: Node): TransformFlags {
-        return transformFlags | aggregateTransformFlagsForNode(child);
+    function aggregateTransformFlagsForChildNode(transformFlags: TransformFlags, node: Node): TransformFlags {
+        return transformFlags | aggregateTransformFlagsForNode(node);
     }
 
-    /**
-     * Gets the transform flags to exclude when unioning the transform flags of a subtree.
-     *
-     * NOTE: This needs to be kept up-to-date with the exclusions used in `computeTransformFlagsForNode`.
-     *       For performance reasons, `computeTransformFlagsForNode` uses local constant values rather
-     *       than calling this function.
-     */
-    function getTransformFlagsSubtreeExclusions(kind: SyntaxKind) {
-        if (kind >= SyntaxKind.FirstTypeNode && kind <= SyntaxKind.LastTypeNode) {
-            return TransformFlags.TypeExcludes;
-        }
-
-        switch (kind) {
-            case SyntaxKind.CallExpression:
-            case SyntaxKind.NewExpression:
-            case SyntaxKind.ArrayLiteralExpression:
-                return TransformFlags.ArrayLiteralOrCallOrNewExcludes;
-            case SyntaxKind.ModuleDeclaration:
-                return TransformFlags.ModuleExcludes;
-            case SyntaxKind.Parameter:
-                return TransformFlags.ParameterExcludes;
-            case SyntaxKind.ArrowFunction:
-                return TransformFlags.ArrowFunctionExcludes;
-            case SyntaxKind.FunctionExpression:
-            case SyntaxKind.FunctionDeclaration:
-                return TransformFlags.FunctionExcludes;
-            case SyntaxKind.VariableDeclarationList:
-                return TransformFlags.VariableDeclarationListExcludes;
-            case SyntaxKind.ClassDeclaration:
-            case SyntaxKind.ClassExpression:
-                return TransformFlags.ClassExcludes;
-            case SyntaxKind.Constructor:
-                return TransformFlags.ConstructorExcludes;
-            case SyntaxKind.MethodDeclaration:
-            case SyntaxKind.GetAccessor:
-            case SyntaxKind.SetAccessor:
-                return TransformFlags.MethodOrAccessorExcludes;
-            case SyntaxKind.AnyKeyword:
-            case SyntaxKind.NumberKeyword:
-            case SyntaxKind.NeverKeyword:
-            case SyntaxKind.StringKeyword:
-            case SyntaxKind.BooleanKeyword:
-            case SyntaxKind.SymbolKeyword:
-            case SyntaxKind.VoidKeyword:
-            case SyntaxKind.TypeParameter:
-            case SyntaxKind.PropertySignature:
-            case SyntaxKind.MethodSignature:
-            case SyntaxKind.CallSignature:
-            case SyntaxKind.ConstructSignature:
-            case SyntaxKind.IndexSignature:
-            case SyntaxKind.InterfaceDeclaration:
-            case SyntaxKind.TypeAliasDeclaration:
-                return TransformFlags.TypeExcludes;
-            case SyntaxKind.ObjectLiteralExpression:
-                return TransformFlags.ObjectLiteralExcludes;
-            default:
-                return TransformFlags.NodeExcludes;
-        }
+    function aggregateTransformFlagsForChildNodes(transformFlags: TransformFlags, nodes: NodeArray<Node>): TransformFlags {
+        return transformFlags | aggregateTransformFlagsForNodeArray(nodes);
     }
 
     export namespace Debug {
-        export const failNotOptional = shouldAssert(AssertionLevel.Normal)
-            ? (message?: string) => assert(false, message || "Node not optional.")
-            : (message?: string) => {};
+        let isDebugInfoEnabled = false;
 
         export const failBadSyntaxKind = shouldAssert(AssertionLevel.Normal)
-            ? (node: Node, message?: string) => assert(false, message || "Unexpected node.", () => `Node ${formatSyntaxKind(node.kind)} was unexpected.`)
-            : (node: Node, message?: string) => {};
+            ? (node: Node, message?: string): void => fail(
+                `${message || "Unexpected node."}\r\nNode ${formatSyntaxKind(node.kind)} was unexpected.`,
+                failBadSyntaxKind)
+            : noop;
+
+        export const assertEachNode = shouldAssert(AssertionLevel.Normal)
+            ? (nodes: Node[], test: (node: Node) => boolean, message?: string): void => assert(
+                test === undefined || every(nodes, test),
+                message || "Unexpected node.",
+                () => `Node array did not pass test '${getFunctionName(test)}'.`,
+                assertEachNode)
+            : noop;
 
         export const assertNode = shouldAssert(AssertionLevel.Normal)
-            ? (node: Node, test: (node: Node) => boolean, message?: string) => assert(
-                    test === undefined || test(node),
-                    message || "Unexpected node.",
-                    () => `Node ${formatSyntaxKind(node.kind)} did not pass test '${getFunctionName(test)}'.`)
-            : (node: Node, test: (node: Node) => boolean, message?: string) => {};
-
-        function getFunctionName(func: Function) {
-            if (typeof func !== "function") {
-                return "";
-            }
-            else if (func.hasOwnProperty("name")) {
-                return (<any>func).name;
-            }
-            else {
-                const text = Function.prototype.toString.call(func);
-                const match = /^function\s+([\w\$]+)\s*\(/.exec(text);
-                return match ? match[1] : "";
+            ? (node: Node, test: (node: Node) => boolean, message?: string): void => assert(
+                test === undefined || test(node),
+                message || "Unexpected node.",
+                () => `Node ${formatSyntaxKind(node.kind)} did not pass test '${getFunctionName(test)}'.`,
+                assertNode)
+            : noop;
+
+        export const assertOptionalNode = shouldAssert(AssertionLevel.Normal)
+            ? (node: Node, test: (node: Node) => boolean, message?: string): void => assert(
+                test === undefined || node === undefined || test(node),
+                message || "Unexpected node.",
+                () => `Node ${formatSyntaxKind(node.kind)} did not pass test '${getFunctionName(test)}'.`,
+                assertOptionalNode)
+            : noop;
+
+        export const assertOptionalToken = shouldAssert(AssertionLevel.Normal)
+            ? (node: Node, kind: SyntaxKind, message?: string): void => assert(
+                kind === undefined || node === undefined || node.kind === kind,
+                message || "Unexpected node.",
+                () => `Node ${formatSyntaxKind(node.kind)} was not a '${formatSyntaxKind(kind)}' token.`,
+                assertOptionalToken)
+            : noop;
+
+        export const assertMissingNode = shouldAssert(AssertionLevel.Normal)
+            ? (node: Node, message?: string): void => assert(
+                node === undefined,
+                message || "Unexpected node.",
+                () => `Node ${formatSyntaxKind(node.kind)} was unexpected'.`,
+                assertMissingNode)
+            : noop;
+
+        /**
+         * Injects debug information into frequently used types.
+         */
+        export function enableDebugInfo() {
+            if (isDebugInfoEnabled) return;
+
+            // Add additional properties in debug mode to assist with debugging.
+            Object.defineProperties(objectAllocator.getSymbolConstructor().prototype, {
+                "__debugFlags": { get(this: Symbol) { return formatSymbolFlags(this.flags); } }
+            });
+
+            Object.defineProperties(objectAllocator.getTypeConstructor().prototype, {
+                "__debugFlags": { get(this: Type) { return formatTypeFlags(this.flags); } },
+                "__debugObjectFlags": { get(this: Type) { return this.flags & TypeFlags.Object ? formatObjectFlags((<ObjectType>this).objectFlags) : ""; } },
+                "__debugTypeToString": { value(this: Type) { return this.checker.typeToString(this); } },
+            });
+
+            const nodeConstructors = [
+                objectAllocator.getNodeConstructor(),
+                objectAllocator.getIdentifierConstructor(),
+                objectAllocator.getTokenConstructor(),
+                objectAllocator.getSourceFileConstructor()
+            ];
+
+            for (const ctor of nodeConstructors) {
+                if (!ctor.prototype.hasOwnProperty("__debugKind")) {
+                    Object.defineProperties(ctor.prototype, {
+                        "__debugKind": { get(this: Node) { return formatSyntaxKind(this.kind); } },
+                        "__debugModifierFlags": { get(this: Node) { return formatModifierFlags(getModifierFlagsNoCache(this)); } },
+                        "__debugTransformFlags": { get(this: Node) { return formatTransformFlags(this.transformFlags); } },
+                        "__debugEmitFlags": { get(this: Node) { return formatEmitFlags(getEmitFlags(this)); } },
+                        "__debugGetText": {
+                            value(this: Node, includeTrivia?: boolean) {
+                                if (nodeIsSynthesized(this)) return "";
+                                const parseNode = getParseTreeNode(this);
+                                const sourceFile = parseNode && getSourceFileOfNode(parseNode);
+                                return sourceFile ? getSourceTextOfNodeFromSourceFile(sourceFile, parseNode, includeTrivia) : "";
+                            }
+                        }
+                    });
+                }
             }
+
+            isDebugInfoEnabled = true;
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/services/breakpoints.ts b/src/services/breakpoints.ts
index bf7fb98..37aa8df 100644
--- a/src/services/breakpoints.ts
+++ b/src/services/breakpoints.ts
@@ -14,7 +14,7 @@ namespace ts.BreakpointResolver {
             return undefined;
         }
 
-        let tokenAtLocation = getTokenAtPosition(sourceFile, position);
+        let tokenAtLocation = getTokenAtPosition(sourceFile, position, /*includeJsDocComment*/ false);
         const lineOfPosition = sourceFile.getLineAndCharacterOfPosition(position).line;
         if (sourceFile.getLineAndCharacterOfPosition(tokenAtLocation.getStart(sourceFile)).line > lineOfPosition) {
             // Get previous token if the token is returned starts on new line
@@ -97,7 +97,7 @@ namespace ts.BreakpointResolver {
                         if (isFunctionBlock(node)) {
                             return spanInFunctionBlock(<Block>node);
                         }
-                    // Fall through
+                        // falls through
                     case SyntaxKind.ModuleBlock:
                         return spanInBlock(<Block>node);
 
@@ -146,7 +146,7 @@ namespace ts.BreakpointResolver {
 
                     case SyntaxKind.ForOfStatement:
                         // span in initializer
-                        return spanInInitializerOfForLike(<ForOfStatement | ForInStatement>node);
+                        return spanInInitializerOfForLike(<ForOfStatement>node);
 
                     case SyntaxKind.SwitchStatement:
                         // span on switch(...)
@@ -186,6 +186,7 @@ namespace ts.BreakpointResolver {
                         if (getModuleInstanceState(node) !== ModuleInstanceState.Instantiated) {
                             return undefined;
                         }
+                        // falls through
 
                     case SyntaxKind.ClassDeclaration:
                     case SyntaxKind.EnumDeclaration:
@@ -264,7 +265,7 @@ namespace ts.BreakpointResolver {
                         // a or ...c  or d: x from
                         // [a, b, ...c] or { a, b } or { d: x } from destructuring pattern
                         if ((node.kind === SyntaxKind.Identifier ||
-                            node.kind == SyntaxKind.SpreadElementExpression ||
+                            node.kind === SyntaxKind.SpreadElement ||
                             node.kind === SyntaxKind.PropertyAssignment ||
                             node.kind === SyntaxKind.ShorthandPropertyAssignment) &&
                             isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent)) {
@@ -370,8 +371,8 @@ namespace ts.BreakpointResolver {
             }
 
             function textSpanFromVariableDeclaration(variableDeclaration: VariableDeclaration): TextSpan {
-                const declarations = variableDeclaration.parent.declarations;
-                if (declarations && declarations[0] === variableDeclaration) {
+                if (variableDeclaration.parent.kind === SyntaxKind.VariableDeclarationList &&
+                    variableDeclaration.parent.declarations[0] === variableDeclaration) {
                     // First declaration - include let keyword
                     return textSpan(findPrecedingToken(variableDeclaration.pos, sourceFile, variableDeclaration.parent), variableDeclaration);
                 }
@@ -400,8 +401,8 @@ namespace ts.BreakpointResolver {
                     return textSpanFromVariableDeclaration(variableDeclaration);
                 }
 
-                const declarations = variableDeclaration.parent.declarations;
-                if (declarations && declarations[0] !== variableDeclaration) {
+                if (variableDeclaration.parent.kind === SyntaxKind.VariableDeclarationList &&
+                    variableDeclaration.parent.declarations[0] !== variableDeclaration) {
                     // If we cannot set breakpoint on this declaration, set it on previous one
                     // Because the variable declaration may be binding pattern and
                     // we would like to set breakpoint in last binding element if that's the case,
@@ -473,6 +474,7 @@ namespace ts.BreakpointResolver {
                         if (getModuleInstanceState(block.parent) !== ModuleInstanceState.Instantiated) {
                             return undefined;
                         }
+                        // falls through
 
                     // Set on parent if on same line otherwise on first statement
                     case SyntaxKind.WhileStatement:
@@ -560,11 +562,11 @@ namespace ts.BreakpointResolver {
             function spanInOpenBraceToken(node: Node): TextSpan {
                 switch (node.parent.kind) {
                     case SyntaxKind.EnumDeclaration:
-                        let enumDeclaration = <EnumDeclaration>node.parent;
+                        const enumDeclaration = <EnumDeclaration>node.parent;
                         return spanInNodeIfStartsOnSameLine(findPrecedingToken(node.pos, sourceFile, node.parent), enumDeclaration.members.length ? enumDeclaration.members[0] : enumDeclaration.getLastToken(sourceFile));
 
                     case SyntaxKind.ClassDeclaration:
-                        let classDeclaration = <ClassDeclaration>node.parent;
+                        const classDeclaration = <ClassDeclaration>node.parent;
                         return spanInNodeIfStartsOnSameLine(findPrecedingToken(node.pos, sourceFile, node.parent), classDeclaration.members.length ? classDeclaration.members[0] : classDeclaration.getLastToken(sourceFile));
 
                     case SyntaxKind.CaseBlock:
@@ -582,6 +584,7 @@ namespace ts.BreakpointResolver {
                         if (getModuleInstanceState(node.parent.parent) !== ModuleInstanceState.Instantiated) {
                             return undefined;
                         }
+                        // falls through
 
                     case SyntaxKind.EnumDeclaration:
                     case SyntaxKind.ClassDeclaration:
@@ -593,15 +596,15 @@ namespace ts.BreakpointResolver {
                             // Span on close brace token
                             return textSpan(node);
                         }
-                        // fall through
+                        // falls through
 
                     case SyntaxKind.CatchClause:
                         return spanInNode(lastOrUndefined((<Block>node.parent).statements));
 
                     case SyntaxKind.CaseBlock:
                         // breakpoint in last statement of the last clause
-                        let caseBlock = <CaseBlock>node.parent;
-                        let lastClause = lastOrUndefined(caseBlock.clauses);
+                        const caseBlock = <CaseBlock>node.parent;
+                        const lastClause = lastOrUndefined(caseBlock.clauses);
                         if (lastClause) {
                             return spanInNode(lastOrUndefined(lastClause.statements));
                         }
@@ -609,7 +612,7 @@ namespace ts.BreakpointResolver {
 
                     case SyntaxKind.ObjectBindingPattern:
                         // Breakpoint in last binding element or binding pattern if it contains no elements
-                        let bindingPattern = <BindingPattern>node.parent;
+                        const bindingPattern = <BindingPattern>node.parent;
                         return spanInNode(lastOrUndefined(bindingPattern.elements) || bindingPattern);
 
                     // Default to parent node
@@ -627,7 +630,7 @@ namespace ts.BreakpointResolver {
                 switch (node.parent.kind) {
                     case SyntaxKind.ArrayBindingPattern:
                         // Breakpoint in last binding element or binding pattern if it contains no elements
-                        let bindingPattern = <BindingPattern>node.parent;
+                        const bindingPattern = <BindingPattern>node.parent;
                         return textSpan(lastOrUndefined(bindingPattern.elements) || bindingPattern);
 
                     default:
diff --git a/src/services/classifier.ts b/src/services/classifier.ts
index 29a8782..ff33059 100644
--- a/src/services/classifier.ts
+++ b/src/services/classifier.ts
@@ -71,7 +71,7 @@ namespace ts {
             const dense = classifications.spans;
             let lastEnd = 0;
 
-            for (let i = 0, n = dense.length; i < n; i += 3) {
+            for (let i = 0; i < dense.length; i += 3) {
                 const start = dense[i];
                 const length = dense[i + 1];
                 const type = <ClassificationType>dense[i + 2];
@@ -160,7 +160,7 @@ namespace ts {
                 case EndOfLineState.InTemplateMiddleOrTail:
                     text = "}\n" + text;
                     offset = 2;
-                // fallthrough
+                    // falls through
                 case EndOfLineState.InTemplateSubstitutionPosition:
                     templateStack.push(SyntaxKind.TemplateHead);
                     break;
@@ -557,7 +557,7 @@ namespace ts {
                     // Only bother calling into the typechecker if this is an identifier that
                     // could possibly resolve to a type name.  This makes classification run
                     // in a third of the time it would normally take.
-                    if (classifiableNames[identifier.text]) {
+                    if (classifiableNames.get(identifier.text)) {
                         const symbol = typeChecker.getSymbolAtLocation(node);
                         if (symbol) {
                             const type = classifySymbol(symbol, getMeaningFromLocation(node));
@@ -573,7 +573,7 @@ namespace ts {
         }
     }
 
-    function getClassificationTypeName(type: ClassificationType) {
+    function getClassificationTypeName(type: ClassificationType): ClassificationTypeNames {
         switch (type) {
             case ClassificationType.comment: return ClassificationTypeNames.comment;
             case ClassificationType.identifier: return ClassificationTypeNames.identifier;
@@ -605,7 +605,7 @@ namespace ts {
         Debug.assert(classifications.spans.length % 3 === 0);
         const dense = classifications.spans;
         const result: ClassifiedSpan[] = [];
-        for (let i = 0, n = dense.length; i < n; i += 3) {
+        for (let i = 0; i < dense.length; i += 3) {
             result.push({
                 textSpan: createTextSpan(dense[i], dense[i + 1]),
                 classificationType: getClassificationTypeName(dense[i + 2])
@@ -685,9 +685,9 @@ namespace ts {
                         continue;
                     }
 
-                    // for the ======== add a comment for the first line, and then lex all
-                    // subsequent lines up until the end of the conflict marker.
-                    Debug.assert(ch === CharacterCodes.equals);
+                    // for the ||||||| and ======== markers, add a comment for the first line,
+                    // and then lex all subsequent lines up until the end of the conflict marker.
+                    Debug.assert(ch === CharacterCodes.bar || ch === CharacterCodes.equals);
                     classifyDisabledMergeCode(text, start, end);
                 }
             }
@@ -724,8 +724,8 @@ namespace ts {
                         pushCommentRange(pos, tag.pos - pos);
                     }
 
-                    pushClassification(tag.atToken.pos, tag.atToken.end - tag.atToken.pos, ClassificationType.punctuation);
-                    pushClassification(tag.tagName.pos, tag.tagName.end - tag.tagName.pos, ClassificationType.docCommentTagName);
+                    pushClassification(tag.atToken.pos, tag.atToken.end - tag.atToken.pos, ClassificationType.punctuation); // "@"
+                    pushClassification(tag.tagName.pos, tag.tagName.end - tag.tagName.pos, ClassificationType.docCommentTagName); // e.g. "param"
 
                     pos = tag.tagName.end;
 
@@ -782,8 +782,8 @@ namespace ts {
         }
 
         function classifyDisabledMergeCode(text: string, start: number, end: number) {
-            // Classify the line that the ======= marker is on as a comment.  Then just lex
-            // all further tokens and add them to the result.
+            // Classify the line that the ||||||| or ======= marker is on as a comment.
+            // Then just lex all further tokens and add them to the result.
             let i: number;
             for (i = start; i < end; i++) {
                 if (isLineBreak(text.charCodeAt(i))) {
@@ -814,7 +814,7 @@ namespace ts {
          * False will mean that node is not classified and traverse routine should recurse into node contents.
          */
         function tryClassifyNode(node: Node): boolean {
-            if (isJSDocTag(node)) {
+            if (isJSDoc(node)) {
                 return true;
             }
 
@@ -954,8 +954,7 @@ namespace ts {
                             return;
                         case SyntaxKind.Parameter:
                             if ((<ParameterDeclaration>token.parent).name === token) {
-                                const isThis = token.kind === SyntaxKind.Identifier && (<Identifier>token).originalKeywordKind === SyntaxKind.ThisKeyword;
-                                return isThis ? ClassificationType.keyword : ClassificationType.parameterName;
+                                return isThisIdentifier(token) ? ClassificationType.keyword : ClassificationType.parameterName;
                             }
                             return;
                     }
@@ -973,9 +972,7 @@ namespace ts {
             if (decodedTextSpanIntersectsWith(spanStart, spanLength, element.pos, element.getFullWidth())) {
                 checkForClassificationCancellation(cancellationToken, element.kind);
 
-                const children = element.getChildren(sourceFile);
-                for (let i = 0, n = children.length; i < n; i++) {
-                    const child = children[i];
+                for (const child of element.getChildren(sourceFile)) {
                     if (!tryClassifyNode(child)) {
                         // Recurse into our child nodes.
                         processElement(child);
diff --git a/src/services/codeFixProvider.ts b/src/services/codeFixProvider.ts
new file mode 100644
index 0000000..6ff7857
--- /dev/null
+++ b/src/services/codeFixProvider.ts
@@ -0,0 +1,51 @@
+/* @internal */
+namespace ts {
+    export interface CodeFix {
+        errorCodes: number[];
+        getCodeActions(context: CodeFixContext): CodeAction[] | undefined;
+    }
+
+    export interface CodeFixContext {
+        errorCode: number;
+        sourceFile: SourceFile;
+        span: TextSpan;
+        program: Program;
+        newLineCharacter: string;
+        host: LanguageServiceHost;
+        cancellationToken: CancellationToken;
+        rulesProvider: formatting.RulesProvider;
+    }
+
+    export namespace codefix {
+        const codeFixes: CodeFix[][] = [];
+
+        export function registerCodeFix(codeFix: CodeFix) {
+            forEach(codeFix.errorCodes, error => {
+                let fixes = codeFixes[error];
+                if (!fixes) {
+                    fixes = [];
+                    codeFixes[error] = fixes;
+                }
+                fixes.push(codeFix);
+            });
+        }
+
+        export function getSupportedErrorCodes() {
+            return Object.keys(codeFixes);
+        }
+
+        export function getFixes(context: CodeFixContext): CodeAction[] {
+            const fixes = codeFixes[context.errorCode];
+            let allActions: CodeAction[] = [];
+
+            forEach(fixes, f => {
+                const actions = f.getCodeActions(context);
+                if (actions && actions.length > 0) {
+                    allActions = allActions.concat(actions);
+                }
+            });
+
+            return allActions;
+        }
+    }
+}
diff --git a/src/services/codefixes/disableJsDiagnostics.ts b/src/services/codefixes/disableJsDiagnostics.ts
new file mode 100644
index 0000000..b5f9e55
--- /dev/null
+++ b/src/services/codefixes/disableJsDiagnostics.ts
@@ -0,0 +1,70 @@
+/* @internal */
+namespace ts.codefix {
+    registerCodeFix({
+        errorCodes: getApplicableDiagnosticCodes(),
+        getCodeActions: getDisableJsDiagnosticsCodeActions
+    });
+
+    function getApplicableDiagnosticCodes(): number[] {
+        const allDiagnostcs = <MapLike<DiagnosticMessage>>Diagnostics;
+        return Object.keys(allDiagnostcs)
+            .filter(d => allDiagnostcs[d] && allDiagnostcs[d].category === DiagnosticCategory.Error)
+            .map(d => allDiagnostcs[d].code);
+    }
+
+    function getIgnoreCommentLocationForLocation(sourceFile: SourceFile, position: number, newLineCharacter: string) {
+        const { line } = getLineAndCharacterOfPosition(sourceFile, position);
+        const lineStartPosition = getStartPositionOfLine(line, sourceFile);
+        const startPosition = getFirstNonSpaceCharacterPosition(sourceFile.text, lineStartPosition);
+
+        // First try to see if we can put the '// @ts-ignore' on the previous line.
+        // We need to make sure that we are not in the middle of a string literal or a comment.
+        // We also want to check if the previous line holds a comment for a node on the next line
+        // if so, we do not want to separate the node from its comment if we can.
+        if (!isInComment(sourceFile, startPosition) && !isInString(sourceFile, startPosition) && !isInTemplateString(sourceFile, startPosition)) {
+            const token = getTouchingToken(sourceFile, startPosition, /*includeJsDocComment*/ false);
+            const tokenLeadingCommnets = getLeadingCommentRangesOfNode(token, sourceFile);
+            if (!tokenLeadingCommnets || !tokenLeadingCommnets.length || tokenLeadingCommnets[0].pos >= startPosition) {
+                return {
+                    span: { start: startPosition, length: 0 },
+                    newText: `// @ts-ignore${newLineCharacter}`
+                };
+            }
+        }
+
+        // If all fails, add an extra new line immediatlly before the error span.
+        return {
+            span: { start: position, length: 0 },
+            newText: `${position === startPosition ? "" : newLineCharacter}// @ts-ignore${newLineCharacter}`
+        };
+    }
+
+    function getDisableJsDiagnosticsCodeActions(context: CodeFixContext): CodeAction[] | undefined {
+        const { sourceFile, program, newLineCharacter, span } = context;
+
+        if (!isInJavaScriptFile(sourceFile) || !isCheckJsEnabledForFile(sourceFile, program.getCompilerOptions())) {
+            return undefined;
+        }
+
+        return [{
+            description: getLocaleSpecificMessage(Diagnostics.Ignore_this_error_message),
+            changes: [{
+                fileName: sourceFile.fileName,
+                textChanges: [getIgnoreCommentLocationForLocation(sourceFile, span.start, newLineCharacter)]
+            }]
+        },
+        {
+            description: getLocaleSpecificMessage(Diagnostics.Disable_checking_for_this_file),
+            changes: [{
+                fileName: sourceFile.fileName,
+                textChanges: [{
+                    span: {
+                        start: sourceFile.checkJsDirective ? sourceFile.checkJsDirective.pos : 0,
+                        length: sourceFile.checkJsDirective ? sourceFile.checkJsDirective.end - sourceFile.checkJsDirective.pos : 0
+                    },
+                    newText: `// @ts-nocheck${newLineCharacter}`
+                }]
+            }]
+        }];
+    }
+}
\ No newline at end of file
diff --git a/src/services/codefixes/fixAddMissingMember.ts b/src/services/codefixes/fixAddMissingMember.ts
new file mode 100644
index 0000000..1587b47
--- /dev/null
+++ b/src/services/codefixes/fixAddMissingMember.ts
@@ -0,0 +1,210 @@
+/* @internal */
+namespace ts.codefix {
+    registerCodeFix({
+        errorCodes: [Diagnostics.Property_0_does_not_exist_on_type_1.code,
+                     Diagnostics.Property_0_does_not_exist_on_type_1_Did_you_mean_2.code],
+        getCodeActions: getActionsForAddMissingMember
+    });
+
+    function getActionsForAddMissingMember(context: CodeFixContext): CodeAction[] | undefined {
+
+        const tokenSourceFile = context.sourceFile;
+        const start = context.span.start;
+        // The identifier of the missing property. eg:
+        // this.missing = 1;
+        //      ^^^^^^^
+        const token = getTokenAtPosition(tokenSourceFile, start, /*includeJsDocComment*/ false);
+
+        if (token.kind !== SyntaxKind.Identifier) {
+            return undefined;
+        }
+
+        if (!isPropertyAccessExpression(token.parent)) {
+            return undefined;
+        }
+
+        const tokenName = token.getText(tokenSourceFile);
+
+        let makeStatic = false;
+        let classDeclaration: ClassLikeDeclaration;
+
+        if (token.parent.expression.kind === SyntaxKind.ThisKeyword) {
+            const containingClassMemberDeclaration = getThisContainer(token, /*includeArrowFunctions*/ false);
+            if (!isClassElement(containingClassMemberDeclaration)) {
+                return undefined;
+            }
+
+            classDeclaration = <ClassLikeDeclaration>containingClassMemberDeclaration.parent;
+
+            // Property accesses on `this` in a static method are accesses of a static member.
+            makeStatic = classDeclaration && hasModifier(containingClassMemberDeclaration, ModifierFlags.Static);
+        }
+        else {
+
+            const checker = context.program.getTypeChecker();
+            const leftExpression = token.parent.expression;
+            const leftExpressionType = checker.getTypeAtLocation(leftExpression);
+
+            if (leftExpressionType.flags & TypeFlags.Object) {
+                const symbol = leftExpressionType.symbol;
+                if (symbol.flags & SymbolFlags.Class) {
+                    classDeclaration = symbol.declarations && <ClassLikeDeclaration>symbol.declarations[0];
+                    if (leftExpressionType !== checker.getDeclaredTypeOfSymbol(symbol)) {
+                        // The expression is a class symbol but the type is not the instance-side.
+                        makeStatic = true;
+                    }
+                }
+            }
+        }
+
+        if (!classDeclaration || !isClassLike(classDeclaration)) {
+            return undefined;
+        }
+
+        const classDeclarationSourceFile = getSourceFileOfNode(classDeclaration);
+        const classOpenBrace = getOpenBraceOfClassLike(classDeclaration, classDeclarationSourceFile);
+
+        return isInJavaScriptFile(classDeclarationSourceFile) ?
+            getActionsForAddMissingMemberInJavaScriptFile(classDeclaration, makeStatic) :
+            getActionsForAddMissingMemberInTypeScriptFile(classDeclaration, makeStatic);
+
+        function getActionsForAddMissingMemberInJavaScriptFile(classDeclaration: ClassLikeDeclaration, makeStatic: boolean): CodeAction[] | undefined {
+            let actions: CodeAction[];
+
+            const methodCodeAction = getActionForMethodDeclaration(/*includeTypeScriptSyntax*/ false);
+            if (methodCodeAction) {
+                actions = [methodCodeAction];
+            }
+
+            if (makeStatic) {
+                if (classDeclaration.kind === SyntaxKind.ClassExpression) {
+                    return actions;
+                }
+
+                const className = classDeclaration.name.getText();
+
+                const staticInitialization = createStatement(createAssignment(
+                    createPropertyAccess(createIdentifier(className), tokenName),
+                    createIdentifier("undefined")));
+
+                const staticInitializationChangeTracker = textChanges.ChangeTracker.fromCodeFixContext(context);
+                staticInitializationChangeTracker.insertNodeAfter(
+                    classDeclarationSourceFile,
+                    classDeclaration,
+                    staticInitialization,
+                    { suffix: context.newLineCharacter });
+                const initializeStaticAction = {
+                    description: formatStringFromArgs(getLocaleSpecificMessage(Diagnostics.Initialize_static_property_0), [tokenName]),
+                    changes: staticInitializationChangeTracker.getChanges()
+                };
+
+                (actions || (actions = [])).push(initializeStaticAction);
+                return actions;
+            }
+            else {
+                const classConstructor = getFirstConstructorWithBody(classDeclaration);
+                if (!classConstructor) {
+                    return actions;
+                }
+
+                const propertyInitialization = createStatement(createAssignment(
+                    createPropertyAccess(createThis(), tokenName),
+                    createIdentifier("undefined")));
+
+                const propertyInitializationChangeTracker = textChanges.ChangeTracker.fromCodeFixContext(context);
+                propertyInitializationChangeTracker.insertNodeAt(
+                    classDeclarationSourceFile,
+                    classConstructor.body.getEnd() - 1,
+                    propertyInitialization,
+                    { prefix: context.newLineCharacter, suffix: context.newLineCharacter });
+
+                const initializeAction = {
+                    description: formatStringFromArgs(getLocaleSpecificMessage(Diagnostics.Initialize_property_0_in_the_constructor), [tokenName]),
+                    changes: propertyInitializationChangeTracker.getChanges()
+                };
+
+                (actions || (actions = [])).push(initializeAction);
+                return actions;
+            }
+        }
+
+        function getActionsForAddMissingMemberInTypeScriptFile(classDeclaration: ClassLikeDeclaration, makeStatic: boolean): CodeAction[] | undefined {
+            let actions: CodeAction[];
+
+            const methodCodeAction = getActionForMethodDeclaration(/*includeTypeScriptSyntax*/ true);
+            if (methodCodeAction) {
+                actions = [methodCodeAction];
+            }
+
+            let typeNode: TypeNode;
+            if (token.parent.parent.kind === SyntaxKind.BinaryExpression) {
+                const binaryExpression = token.parent.parent as BinaryExpression;
+                const otherExpression = token.parent === binaryExpression.left ? binaryExpression.right : binaryExpression.left;
+                const checker = context.program.getTypeChecker();
+                const widenedType = checker.getWidenedType(checker.getBaseTypeOfLiteralType(checker.getTypeAtLocation(otherExpression)));
+                typeNode = checker.typeToTypeNode(widenedType, classDeclaration);
+            }
+            typeNode = typeNode || createKeywordTypeNode(SyntaxKind.AnyKeyword);
+
+            const property = createProperty(
+                /*decorators*/undefined,
+                /*modifiers*/ makeStatic ? [createToken(SyntaxKind.StaticKeyword)] : undefined,
+                tokenName,
+                /*questionToken*/ undefined,
+                typeNode,
+                /*initializer*/ undefined);
+            const propertyChangeTracker = textChanges.ChangeTracker.fromCodeFixContext(context);
+            propertyChangeTracker.insertNodeAfter(classDeclarationSourceFile, classOpenBrace, property, { suffix: context.newLineCharacter });
+
+            (actions || (actions = [])).push({
+                description: formatStringFromArgs(getLocaleSpecificMessage(Diagnostics.Declare_property_0), [tokenName]),
+                changes: propertyChangeTracker.getChanges()
+            });
+
+            if (!makeStatic) {
+                // Index signatures cannot have the static modifier.
+                const stringTypeNode = createKeywordTypeNode(SyntaxKind.StringKeyword);
+                const indexingParameter = createParameter(
+                    /*decorators*/ undefined,
+                    /*modifiers*/ undefined,
+                    /*dotDotDotToken*/ undefined,
+                    "x",
+                    /*questionToken*/ undefined,
+                    stringTypeNode,
+                    /*initializer*/ undefined);
+                const indexSignature = createIndexSignature(
+                    /*decorators*/ undefined,
+                    /*modifiers*/ undefined,
+                    [indexingParameter],
+                    typeNode);
+
+                const indexSignatureChangeTracker = textChanges.ChangeTracker.fromCodeFixContext(context);
+                indexSignatureChangeTracker.insertNodeAfter(classDeclarationSourceFile, classOpenBrace, indexSignature, { suffix: context.newLineCharacter });
+
+                actions.push({
+                    description: formatStringFromArgs(getLocaleSpecificMessage(Diagnostics.Add_index_signature_for_property_0), [tokenName]),
+                    changes: indexSignatureChangeTracker.getChanges()
+                });
+            }
+
+            return actions;
+        }
+
+        function getActionForMethodDeclaration(includeTypeScriptSyntax: boolean): CodeAction | undefined {
+            if (token.parent.parent.kind === SyntaxKind.CallExpression) {
+                const callExpression = <CallExpression>token.parent.parent;
+                const methodDeclaration = createMethodFromCallExpression(callExpression, tokenName, includeTypeScriptSyntax, makeStatic);
+
+                const methodDeclarationChangeTracker = textChanges.ChangeTracker.fromCodeFixContext(context);
+                methodDeclarationChangeTracker.insertNodeAfter(classDeclarationSourceFile, classOpenBrace, methodDeclaration, { suffix: context.newLineCharacter });
+                return {
+                    description: formatStringFromArgs(getLocaleSpecificMessage(makeStatic ?
+                        Diagnostics.Declare_method_0 :
+                        Diagnostics.Declare_static_method_0),
+                        [tokenName]),
+                    changes: methodDeclarationChangeTracker.getChanges()
+                };
+            }
+        }
+    }
+}
diff --git a/src/services/codefixes/fixClassDoesntImplementInheritedAbstractMember.ts b/src/services/codefixes/fixClassDoesntImplementInheritedAbstractMember.ts
new file mode 100644
index 0000000..768eaf7
--- /dev/null
+++ b/src/services/codefixes/fixClassDoesntImplementInheritedAbstractMember.ts
@@ -0,0 +1,52 @@
+/* @internal */
+namespace ts.codefix {
+    registerCodeFix({
+        errorCodes: [Diagnostics.Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2.code],
+        getCodeActions: getActionForClassLikeMissingAbstractMember
+    });
+
+    registerCodeFix({
+        errorCodes: [Diagnostics.Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1.code],
+        getCodeActions: getActionForClassLikeMissingAbstractMember
+    });
+
+    function getActionForClassLikeMissingAbstractMember(context: CodeFixContext): CodeAction[] | undefined {
+        const sourceFile = context.sourceFile;
+        const start = context.span.start;
+        // This is the identifier in the case of a class declaration
+        // or the class keyword token in the case of a class expression.
+        const token = getTokenAtPosition(sourceFile, start, /*includeJsDocComment*/ false);
+        const checker = context.program.getTypeChecker();
+
+        if (isClassLike(token.parent)) {
+            const classDeclaration = token.parent as ClassLikeDeclaration;
+
+            const extendsNode = getClassExtendsHeritageClauseElement(classDeclaration);
+            const instantiatedExtendsType = checker.getTypeAtLocation(extendsNode);
+
+            // Note that this is ultimately derived from a map indexed by symbol names,
+            // so duplicates cannot occur.
+            const extendsSymbols = checker.getPropertiesOfType(instantiatedExtendsType);
+            const abstractAndNonPrivateExtendsSymbols = extendsSymbols.filter(symbolPointsToNonPrivateAndAbstractMember);
+
+            const newNodes = createMissingMemberNodes(classDeclaration, abstractAndNonPrivateExtendsSymbols, checker);
+            const changes = newNodesToChanges(newNodes, getOpenBraceOfClassLike(classDeclaration, sourceFile), context);
+            if (changes && changes.length > 0) {
+                return [{
+                    description: getLocaleSpecificMessage(Diagnostics.Implement_inherited_abstract_class),
+                    changes
+                }];
+            }
+        }
+
+        return undefined;
+
+    }
+
+    function symbolPointsToNonPrivateAndAbstractMember(symbol: Symbol): boolean {
+        const decls = symbol.getDeclarations();
+        Debug.assert(!!(decls && decls.length > 0));
+        const flags = getModifierFlags(decls[0]);
+        return !(flags & ModifierFlags.Private) && !!(flags & ModifierFlags.Abstract);
+    }
+}
\ No newline at end of file
diff --git a/src/services/codefixes/fixClassIncorrectlyImplementsInterface.ts b/src/services/codefixes/fixClassIncorrectlyImplementsInterface.ts
new file mode 100644
index 0000000..bed9621
--- /dev/null
+++ b/src/services/codefixes/fixClassIncorrectlyImplementsInterface.ts
@@ -0,0 +1,68 @@
+/* @internal */
+namespace ts.codefix {
+    registerCodeFix({
+        errorCodes: [Diagnostics.Class_0_incorrectly_implements_interface_1.code],
+        getCodeActions: getActionForClassLikeIncorrectImplementsInterface
+    });
+
+    function getActionForClassLikeIncorrectImplementsInterface(context: CodeFixContext): CodeAction[] | undefined {
+        const sourceFile = context.sourceFile;
+        const start = context.span.start;
+        const token = getTokenAtPosition(sourceFile, start, /*includeJsDocComment*/ false);
+        const checker = context.program.getTypeChecker();
+
+        const classDeclaration = getContainingClass(token);
+        if (!classDeclaration) {
+            return undefined;
+        }
+
+        const openBrace = getOpenBraceOfClassLike(classDeclaration, sourceFile);
+        const classType = checker.getTypeAtLocation(classDeclaration) as InterfaceType;
+        const implementedTypeNodes = getClassImplementsHeritageClauseElements(classDeclaration);
+
+        const hasNumericIndexSignature = !!checker.getIndexTypeOfType(classType, IndexKind.Number);
+        const hasStringIndexSignature = !!checker.getIndexTypeOfType(classType, IndexKind.String);
+
+        const result: CodeAction[] = [];
+        for (const implementedTypeNode of implementedTypeNodes) {
+            // Note that this is ultimately derived from a map indexed by symbol names,
+            // so duplicates cannot occur.
+            const implementedType = checker.getTypeAtLocation(implementedTypeNode) as InterfaceType;
+            const implementedTypeSymbols = checker.getPropertiesOfType(implementedType);
+            const nonPrivateMembers = implementedTypeSymbols.filter(symbol => !(getModifierFlags(symbol.valueDeclaration) & ModifierFlags.Private));
+
+            let newNodes: Node[] = [];
+            createAndAddMissingIndexSignatureDeclaration(implementedType, IndexKind.Number, hasNumericIndexSignature, newNodes);
+            createAndAddMissingIndexSignatureDeclaration(implementedType, IndexKind.String, hasStringIndexSignature, newNodes);
+            newNodes = newNodes.concat(createMissingMemberNodes(classDeclaration, nonPrivateMembers, checker));
+            const message = formatStringFromArgs(getLocaleSpecificMessage(Diagnostics.Implement_interface_0), [implementedTypeNode.getText()]);
+            if (newNodes.length > 0) {
+                pushAction(result, newNodes, message);
+            }
+        }
+
+        return result;
+
+        function createAndAddMissingIndexSignatureDeclaration(type: InterfaceType, kind: IndexKind, hasIndexSigOfKind: boolean, newNodes: Node[]): void {
+            if (hasIndexSigOfKind) {
+                return;
+            }
+
+            const indexInfoOfKind = checker.getIndexInfoOfType(type, kind);
+
+            if (!indexInfoOfKind) {
+                return;
+            }
+            const newIndexSignatureDeclaration = checker.indexInfoToIndexSignatureDeclaration(indexInfoOfKind, kind, classDeclaration);
+            newNodes.push(newIndexSignatureDeclaration);
+        }
+
+        function pushAction(result: CodeAction[], newNodes: Node[], description: string): void {
+            const newAction: CodeAction = {
+                description: description,
+                changes: newNodesToChanges(newNodes, openBrace, context)
+            };
+            result.push(newAction);
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/services/codefixes/fixClassSuperMustPrecedeThisAccess.ts b/src/services/codefixes/fixClassSuperMustPrecedeThisAccess.ts
new file mode 100644
index 0000000..56128be
--- /dev/null
+++ b/src/services/codefixes/fixClassSuperMustPrecedeThisAccess.ts
@@ -0,0 +1,49 @@
+/* @internal */
+namespace ts.codefix {
+    registerCodeFix({
+        errorCodes: [Diagnostics.super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class.code],
+        getCodeActions: (context: CodeFixContext) => {
+            const sourceFile = context.sourceFile;
+
+            const token = getTokenAtPosition(sourceFile, context.span.start, /*includeJsDocComment*/ false);
+            if (token.kind !== SyntaxKind.ThisKeyword) {
+                return undefined;
+            }
+
+            const constructor = getContainingFunction(token);
+            const superCall = findSuperCall((<ConstructorDeclaration>constructor).body);
+            if (!superCall) {
+                return undefined;
+            }
+
+            // figure out if the `this` access is actually inside the supercall
+            // i.e. super(this.a), since in that case we won't suggest a fix
+            if (superCall.expression && superCall.expression.kind === SyntaxKind.CallExpression) {
+                const arguments = (<CallExpression>superCall.expression).arguments;
+                for (let i = 0; i < arguments.length; i++) {
+                    if ((<PropertyAccessExpression>arguments[i]).expression === token) {
+                        return undefined;
+                    }
+                }
+            }
+            const changeTracker = textChanges.ChangeTracker.fromCodeFixContext(context);
+            changeTracker.insertNodeAfter(sourceFile, getOpenBrace(<ConstructorDeclaration>constructor, sourceFile), superCall, { suffix: context.newLineCharacter });
+            changeTracker.deleteNode(sourceFile, superCall);
+
+            return [{
+                description: getLocaleSpecificMessage(Diagnostics.Make_super_call_the_first_statement_in_the_constructor),
+                changes: changeTracker.getChanges()
+            }];
+
+            function findSuperCall(n: Node): ExpressionStatement {
+                if (n.kind === SyntaxKind.ExpressionStatement && isSuperCall((<ExpressionStatement>n).expression)) {
+                    return <ExpressionStatement>n;
+                }
+                if (isFunctionLike(n)) {
+                    return undefined;
+                }
+                return forEachChild(n, findSuperCall);
+            }
+        }
+    });
+}
\ No newline at end of file
diff --git a/src/services/codefixes/fixConstructorForDerivedNeedSuperCall.ts b/src/services/codefixes/fixConstructorForDerivedNeedSuperCall.ts
new file mode 100644
index 0000000..517a79e
--- /dev/null
+++ b/src/services/codefixes/fixConstructorForDerivedNeedSuperCall.ts
@@ -0,0 +1,23 @@
+/* @internal */
+namespace ts.codefix {
+    registerCodeFix({
+        errorCodes: [Diagnostics.Constructors_for_derived_classes_must_contain_a_super_call.code],
+        getCodeActions: (context: CodeFixContext) => {
+            const sourceFile = context.sourceFile;
+            const token = getTokenAtPosition(sourceFile, context.span.start, /*includeJsDocComment*/ false);
+
+            if (token.kind !== SyntaxKind.ConstructorKeyword) {
+                return undefined;
+            }
+
+            const changeTracker = textChanges.ChangeTracker.fromCodeFixContext(context);
+            const superCall = createStatement(createCall(createSuper(), /*typeArguments*/ undefined, /*argumentsArray*/ emptyArray));
+            changeTracker.insertNodeAfter(sourceFile, getOpenBrace(<ConstructorDeclaration>token.parent, sourceFile), superCall, { suffix: context.newLineCharacter });
+
+            return [{
+                description: getLocaleSpecificMessage(Diagnostics.Add_missing_super_call),
+                changes: changeTracker.getChanges()
+            }];
+        }
+    });
+}
\ No newline at end of file
diff --git a/src/services/codefixes/fixExtendsInterfaceBecomesImplements.ts b/src/services/codefixes/fixExtendsInterfaceBecomesImplements.ts
new file mode 100644
index 0000000..d23f61d
--- /dev/null
+++ b/src/services/codefixes/fixExtendsInterfaceBecomesImplements.ts
@@ -0,0 +1,43 @@
+/* @internal */
+namespace ts.codefix {
+    registerCodeFix({
+        errorCodes: [Diagnostics.Cannot_extend_an_interface_0_Did_you_mean_implements.code],
+        getCodeActions: (context: CodeFixContext) => {
+            const sourceFile = context.sourceFile;
+            const start = context.span.start;
+            const token = getTokenAtPosition(sourceFile, start, /*includeJsDocComment*/ false);
+            const classDeclNode = getContainingClass(token);
+            if (!(token.kind === SyntaxKind.Identifier && isClassLike(classDeclNode))) {
+                return undefined;
+            }
+
+            const heritageClauses = classDeclNode.heritageClauses;
+            if (!(heritageClauses && heritageClauses.length > 0)) {
+                return undefined;
+            }
+
+            const extendsToken = heritageClauses[0].getFirstToken();
+            if (!(extendsToken && extendsToken.kind === SyntaxKind.ExtendsKeyword)) {
+                return undefined;
+            }
+
+            const changeTracker = textChanges.ChangeTracker.fromCodeFixContext(context);
+            changeTracker.replaceNode(sourceFile, extendsToken, createToken(SyntaxKind.ImplementsKeyword));
+
+            // We replace existing keywords with commas.
+            for (let i = 1; i < heritageClauses.length; i++) {
+                const keywordToken = heritageClauses[i].getFirstToken();
+                if (keywordToken) {
+                    changeTracker.replaceNode(sourceFile, keywordToken, createToken(SyntaxKind.CommaToken));
+                }
+            }
+
+            const result = [{
+                description: getLocaleSpecificMessage(Diagnostics.Change_extends_to_implements),
+                changes: changeTracker.getChanges()
+            }];
+
+            return result;
+        }
+    });
+}
diff --git a/src/services/codefixes/fixForgottenThisPropertyAccess.ts b/src/services/codefixes/fixForgottenThisPropertyAccess.ts
new file mode 100644
index 0000000..6925b55
--- /dev/null
+++ b/src/services/codefixes/fixForgottenThisPropertyAccess.ts
@@ -0,0 +1,20 @@
+/* @internal */
+namespace ts.codefix {
+    registerCodeFix({
+        errorCodes: [Diagnostics.Cannot_find_name_0_Did_you_mean_the_instance_member_this_0.code],
+        getCodeActions: (context: CodeFixContext) => {
+            const sourceFile = context.sourceFile;
+            const token = getTokenAtPosition(sourceFile, context.span.start, /*includeJsDocComment*/ false);
+            if (token.kind !== SyntaxKind.Identifier) {
+                return undefined;
+            }
+            const changeTracker = textChanges.ChangeTracker.fromCodeFixContext(context);
+            changeTracker.replaceNode(sourceFile, token, createPropertyAccess(createThis(), <Identifier>token));
+
+            return [{
+                description: getLocaleSpecificMessage(Diagnostics.Add_this_to_unresolved_variable),
+                changes: changeTracker.getChanges()
+            }];
+        }
+    });
+}
\ No newline at end of file
diff --git a/src/services/codefixes/fixSpelling.ts b/src/services/codefixes/fixSpelling.ts
new file mode 100644
index 0000000..c8f539e
--- /dev/null
+++ b/src/services/codefixes/fixSpelling.ts
@@ -0,0 +1,53 @@
+/* @internal */
+namespace ts.codefix {
+    registerCodeFix({
+        errorCodes: [Diagnostics.Property_0_does_not_exist_on_type_1_Did_you_mean_2.code,
+                     Diagnostics.Cannot_find_name_0_Did_you_mean_1.code],
+        getCodeActions: getActionsForCorrectSpelling
+    });
+
+    function getActionsForCorrectSpelling(context: CodeFixContext): CodeAction[] | undefined {
+        const sourceFile = context.sourceFile;
+
+        // This is the identifier of the misspelled word. eg:
+        // this.speling = 1;
+        //      ^^^^^^^
+        const node = getTokenAtPosition(sourceFile, context.span.start, /*includeJsDocComment*/ false); // TODO: GH#15852
+        const checker = context.program.getTypeChecker();
+        let suggestion: string;
+        if (node.kind === SyntaxKind.Identifier && isPropertyAccessExpression(node.parent)) {
+            const containingType = checker.getTypeAtLocation(node.parent.expression);
+            suggestion = checker.getSuggestionForNonexistentProperty(node as Identifier, containingType);
+        }
+        else {
+            const meaning = getMeaningFromLocation(node);
+            suggestion = checker.getSuggestionForNonexistentSymbol(node, getTextOfNode(node), convertSemanticMeaningToSymbolFlags(meaning));
+        }
+        if (suggestion) {
+            return [{
+                description: formatStringFromArgs(getLocaleSpecificMessage(Diagnostics.Change_spelling_to_0), [suggestion]),
+                changes: [{
+                    fileName: sourceFile.fileName,
+                    textChanges: [{
+                        span: { start: node.getStart(), length: node.getWidth() },
+                        newText: suggestion
+                    }],
+                }],
+            }];
+        }
+    }
+
+    function convertSemanticMeaningToSymbolFlags(meaning: SemanticMeaning): SymbolFlags {
+        let flags = 0;
+        if (meaning & SemanticMeaning.Namespace) {
+            flags |= SymbolFlags.Namespace;
+        }
+        if (meaning & SemanticMeaning.Type) {
+            flags |= SymbolFlags.Type;
+        }
+        if (meaning & SemanticMeaning.Value) {
+            flags |= SymbolFlags.Value;
+        }
+        return flags;
+    }
+}
diff --git a/src/services/codefixes/fixUnusedIdentifier.ts b/src/services/codefixes/fixUnusedIdentifier.ts
new file mode 100644
index 0000000..cbe2ba5
--- /dev/null
+++ b/src/services/codefixes/fixUnusedIdentifier.ts
@@ -0,0 +1,201 @@
+/* @internal */
+namespace ts.codefix {
+    registerCodeFix({
+        errorCodes: [
+            Diagnostics._0_is_declared_but_never_used.code,
+            Diagnostics.Property_0_is_declared_but_never_used.code
+        ],
+        getCodeActions: (context: CodeFixContext) => {
+            const sourceFile = context.sourceFile;
+            const start = context.span.start;
+
+            let token = getTokenAtPosition(sourceFile, start, /*includeJsDocComment*/ false);
+
+            // this handles var ["computed"] = 12;
+            if (token.kind === SyntaxKind.OpenBracketToken) {
+                token = getTokenAtPosition(sourceFile, start + 1, /*includeJsDocComment*/ false);
+            }
+
+            switch (token.kind) {
+                case ts.SyntaxKind.Identifier:
+                    return deleteIdentifierOrPrefixWithUnderscore(<Identifier>token);
+
+                case SyntaxKind.PropertyDeclaration:
+                case SyntaxKind.NamespaceImport:
+                    return [deleteNode(token.parent)];
+
+                default:
+                    return [deleteDefault()];
+            }
+
+            function deleteDefault() {
+                if (isDeclarationName(token)) {
+                    return deleteNode(token.parent);
+                }
+                else if (isLiteralComputedPropertyDeclarationName(token)) {
+                    return deleteNode(token.parent.parent);
+                }
+                else {
+                    return undefined;
+                }
+            }
+
+            function prefixIdentifierWithUnderscore(identifier: Identifier): CodeAction {
+                const startPosition = identifier.getStart(sourceFile, /*includeJsDocComment*/ false);
+                return {
+                    description: formatStringFromArgs(getLocaleSpecificMessage(Diagnostics.Prefix_0_with_an_underscore), { 0: token.getText() }),
+                    changes: [{
+                        fileName: sourceFile.path,
+                        textChanges: [{
+                            span: { start: startPosition, length: 0 },
+                            newText: "_"
+                        }]
+                    }]
+                };
+            }
+
+            function deleteIdentifierOrPrefixWithUnderscore(identifier: Identifier): CodeAction[] | undefined {
+                const parent = identifier.parent;
+                switch (parent.kind) {
+                    case ts.SyntaxKind.VariableDeclaration:
+                        return deleteVariableDeclarationOrPrefixWithUnderscore(identifier, <ts.VariableDeclaration>parent);
+
+                    case SyntaxKind.TypeParameter:
+                        const typeParameters = (<DeclarationWithTypeParameters>parent.parent).typeParameters;
+                        if (typeParameters.length === 1) {
+                            const previousToken = getTokenAtPosition(sourceFile, typeParameters.pos - 1, /*includeJsDocComment*/ false);
+                            const nextToken = getTokenAtPosition(sourceFile, typeParameters.end, /*includeJsDocComment*/ false);
+                            Debug.assert(previousToken.kind === SyntaxKind.LessThanToken);
+                            Debug.assert(nextToken.kind === SyntaxKind.GreaterThanToken);
+
+                            return [deleteNodeRange(previousToken, nextToken)];
+                        }
+                        else {
+                            return [deleteNodeInList(parent)];
+                        }
+
+                    case ts.SyntaxKind.Parameter:
+                        const functionDeclaration = <FunctionDeclaration>parent.parent;
+                        return [functionDeclaration.parameters.length === 1 ? deleteNode(parent) : deleteNodeInList(parent),
+                            prefixIdentifierWithUnderscore(identifier)];
+
+                    // handle case where 'import a = A;'
+                    case SyntaxKind.ImportEqualsDeclaration:
+                        const importEquals = getAncestor(identifier, SyntaxKind.ImportEqualsDeclaration);
+                        return [deleteNode(importEquals)];
+
+                    case SyntaxKind.ImportSpecifier:
+                        const namedImports = <NamedImports>parent.parent;
+                        if (namedImports.elements.length === 1) {
+                            // Only 1 import and it is unused. So the entire declaration should be removed.
+                            const importSpec = getAncestor(identifier, SyntaxKind.ImportDeclaration);
+                            return [deleteNode(importSpec)];
+                        }
+                        else {
+                            // delete import specifier
+                            return [deleteNodeInList(parent)];
+                        }
+
+                    // handle case where "import d, * as ns from './file'"
+                    // or "'import {a, b as ns} from './file'"
+                    case SyntaxKind.ImportClause: // this covers both 'import |d|' and 'import |d,| *'
+                        const importClause = <ImportClause>parent;
+                        if (!importClause.namedBindings) { // |import d from './file'| or |import * as ns from './file'|
+                            const importDecl = getAncestor(importClause, SyntaxKind.ImportDeclaration);
+                            return [deleteNode(importDecl)];
+                        }
+                        else {
+                            // import |d,| * as ns from './file'
+                            const start = importClause.name.getStart(sourceFile);
+                            const nextToken = getTokenAtPosition(sourceFile, importClause.name.end, /*includeJsDocComment*/ false);
+                            if (nextToken && nextToken.kind === SyntaxKind.CommaToken) {
+                                // shift first non-whitespace position after comma to the start position of the node
+                                return [deleteRange({ pos: start, end: skipTrivia(sourceFile.text, nextToken.end, /*stopAfterLineBreaks*/ false, /*stopAtComments*/ true) })];
+                            }
+                            else {
+                                return [deleteNode(importClause.name)];
+                            }
+                        }
+
+                    case SyntaxKind.NamespaceImport:
+                        const namespaceImport = <NamespaceImport>parent;
+                        if (namespaceImport.name === identifier && !(<ImportClause>namespaceImport.parent).name) {
+                            const importDecl = getAncestor(namespaceImport, SyntaxKind.ImportDeclaration);
+                            return [deleteNode(importDecl)];
+                        }
+                        else {
+                            const previousToken = getTokenAtPosition(sourceFile, namespaceImport.pos - 1, /*includeJsDocComment*/ false);
+                            if (previousToken && previousToken.kind === SyntaxKind.CommaToken) {
+                                const startPosition = textChanges.getAdjustedStartPosition(sourceFile, previousToken, {}, textChanges.Position.FullStart);
+                                return [deleteRange({ pos: startPosition, end: namespaceImport.end })];
+                            }
+                            return [deleteRange(namespaceImport)];
+                        }
+
+                    default:
+                        return [deleteDefault()];
+                }
+            }
+
+            // token.parent is a variableDeclaration
+            function deleteVariableDeclarationOrPrefixWithUnderscore(identifier: Identifier, varDecl: ts.VariableDeclaration): CodeAction[] | undefined {
+                switch (varDecl.parent.parent.kind) {
+                    case SyntaxKind.ForStatement:
+                        const forStatement = <ForStatement>varDecl.parent.parent;
+                        const forInitializer = <VariableDeclarationList>forStatement.initializer;
+                        return [forInitializer.declarations.length === 1 ? deleteNode(forInitializer) : deleteNodeInList(varDecl)];
+
+                    case SyntaxKind.ForOfStatement:
+                        const forOfStatement = <ForOfStatement>varDecl.parent.parent;
+                        Debug.assert(forOfStatement.initializer.kind === SyntaxKind.VariableDeclarationList);
+                        const forOfInitializer = <VariableDeclarationList>forOfStatement.initializer;
+                        return [
+                            replaceNode(forOfInitializer.declarations[0], createObjectLiteral()),
+                            prefixIdentifierWithUnderscore(identifier)
+                        ];
+
+                    case SyntaxKind.ForInStatement:
+                        // There is no valid fix in the case of:
+                        //  for .. in
+                        return [prefixIdentifierWithUnderscore(identifier)];
+
+                    default:
+                        const variableStatement = <VariableStatement>varDecl.parent.parent;
+                        if (variableStatement.declarationList.declarations.length === 1) {
+                            return [deleteNode(variableStatement)];
+                        }
+                        else {
+                            return [deleteNodeInList(varDecl)];
+                        }
+                }
+            }
+
+            function deleteNode(n: Node) {
+                return makeChange(textChanges.ChangeTracker.fromCodeFixContext(context).deleteNode(sourceFile, n));
+            }
+
+            function deleteRange(range: TextRange) {
+                return makeChange(textChanges.ChangeTracker.fromCodeFixContext(context).deleteRange(sourceFile, range));
+            }
+
+            function deleteNodeInList(n: Node) {
+                return makeChange(textChanges.ChangeTracker.fromCodeFixContext(context).deleteNodeInList(sourceFile, n));
+            }
+
+            function deleteNodeRange(start: Node, end: Node) {
+                return makeChange(textChanges.ChangeTracker.fromCodeFixContext(context).deleteNodeRange(sourceFile, start, end));
+            }
+
+            function replaceNode(n: Node, newNode: Node) {
+                return makeChange(textChanges.ChangeTracker.fromCodeFixContext(context).replaceNode(sourceFile, n, newNode));
+            }
+
+            function makeChange(changeTracker: textChanges.ChangeTracker): CodeAction {
+                return {
+                    description: formatStringFromArgs(getLocaleSpecificMessage(Diagnostics.Remove_declaration_for_Colon_0), { 0: token.getText() }),
+                    changes: changeTracker.getChanges()
+                };
+            }
+        }
+    });
+}
\ No newline at end of file
diff --git a/src/services/codefixes/fixes.ts b/src/services/codefixes/fixes.ts
new file mode 100644
index 0000000..c388202
--- /dev/null
+++ b/src/services/codefixes/fixes.ts
@@ -0,0 +1,12 @@
+/// <reference path="fixClassIncorrectlyImplementsInterface.ts" />
+/// <reference path="fixAddMissingMember.ts" />
+/// <reference path="fixSpelling.ts" />
+/// <reference path="fixClassDoesntImplementInheritedAbstractMember.ts" />
+/// <reference path="fixClassSuperMustPrecedeThisAccess.ts" />
+/// <reference path="fixConstructorForDerivedNeedSuperCall.ts" />
+/// <reference path="fixExtendsInterfaceBecomesImplements.ts" />
+/// <reference path="fixForgottenThisPropertyAccess.ts" />
+/// <reference path='fixUnusedIdentifier.ts' />
+/// <reference path='importFixes.ts' />
+/// <reference path='disableJsDiagnostics.ts' />
+/// <reference path='helpers.ts' />
diff --git a/src/services/codefixes/helpers.ts b/src/services/codefixes/helpers.ts
new file mode 100644
index 0000000..81aae4c
--- /dev/null
+++ b/src/services/codefixes/helpers.ts
@@ -0,0 +1,266 @@
+/* @internal */
+namespace ts.codefix {
+
+    export function newNodesToChanges(newNodes: Node[], insertAfter: Node, context: CodeFixContext) {
+        const sourceFile = context.sourceFile;
+
+        const changeTracker = textChanges.ChangeTracker.fromCodeFixContext(context);
+
+        for (const newNode of newNodes) {
+            changeTracker.insertNodeAfter(sourceFile, insertAfter, newNode, { suffix: context.newLineCharacter });
+        }
+
+        const changes = changeTracker.getChanges();
+        if (!some(changes)) {
+            return changes;
+        }
+
+        Debug.assert(changes.length === 1);
+        const consolidatedChanges: FileTextChanges[] = [{
+            fileName: changes[0].fileName,
+            textChanges: [{
+                span: changes[0].textChanges[0].span,
+                newText: changes[0].textChanges.reduce((prev, cur) => prev + cur.newText, "")
+            }]
+
+        }];
+        return consolidatedChanges;
+    }
+
+    /**
+     * Finds members of the resolved type that are missing in the class pointed to by class decl
+     * and generates source code for the missing members.
+     * @param possiblyMissingSymbols The collection of symbols to filter and then get insertions for.
+     * @returns Empty string iff there are no member insertions.
+     */
+    export function createMissingMemberNodes(classDeclaration: ClassLikeDeclaration, possiblyMissingSymbols: Symbol[], checker: TypeChecker): Node[] {
+        const classMembers = classDeclaration.symbol.members;
+        const missingMembers = possiblyMissingSymbols.filter(symbol => !classMembers.has(symbol.getName()));
+
+        let newNodes: Node[] = [];
+        for (const symbol of missingMembers) {
+            const newNode = createNewNodeForMemberSymbol(symbol, classDeclaration, checker);
+            if (newNode) {
+                if (Array.isArray(newNode)) {
+                    newNodes = newNodes.concat(newNode);
+                }
+                else {
+                    newNodes.push(newNode);
+                }
+            }
+        }
+        return newNodes;
+    }
+
+    /**
+     * @returns Empty string iff there we can't figure out a representation for `symbol` in `enclosingDeclaration`.
+     */
+    function createNewNodeForMemberSymbol(symbol: Symbol, enclosingDeclaration: ClassLikeDeclaration, checker: TypeChecker): Node[] | Node | undefined {
+        const declarations = symbol.getDeclarations();
+        if (!(declarations && declarations.length)) {
+            return undefined;
+        }
+
+        const declaration = declarations[0] as Declaration;
+        // Clone name to remove leading trivia.
+        const name = getSynthesizedClone(getNameOfDeclaration(declaration)) as PropertyName;
+        const visibilityModifier = createVisibilityModifier(getModifierFlags(declaration));
+        const modifiers = visibilityModifier ? createNodeArray([visibilityModifier]) : undefined;
+        const type = checker.getWidenedType(checker.getTypeOfSymbolAtLocation(symbol, enclosingDeclaration));
+        const optional = !!(symbol.flags & SymbolFlags.Optional);
+
+        switch (declaration.kind) {
+            case SyntaxKind.GetAccessor:
+            case SyntaxKind.SetAccessor:
+            case SyntaxKind.PropertySignature:
+            case SyntaxKind.PropertyDeclaration:
+                const typeNode = checker.typeToTypeNode(type, enclosingDeclaration);
+                const property = createProperty(
+                    /*decorators*/undefined,
+                    modifiers,
+                    name,
+                    optional ? createToken(SyntaxKind.QuestionToken) : undefined,
+                    typeNode,
+                    /*initializer*/ undefined);
+                return property;
+            case SyntaxKind.MethodSignature:
+            case SyntaxKind.MethodDeclaration:
+                // The signature for the implementation appears as an entry in `signatures` iff
+                // there is only one signature.
+                // If there are overloads and an implementation signature, it appears as an
+                // extra declaration that isn't a signature for `type`.
+                // If there is more than one overload but no implementation signature
+                // (eg: an abstract method or interface declaration), there is a 1-1
+                // correspondence of declarations and signatures.
+                const signatures = checker.getSignaturesOfType(type, SignatureKind.Call);
+                if (!some(signatures)) {
+                    return undefined;
+                }
+
+                if (declarations.length === 1) {
+                    Debug.assert(signatures.length === 1);
+                    const signature = signatures[0];
+                    return signatureToMethodDeclaration(signature, enclosingDeclaration, createStubbedMethodBody());
+                }
+
+                const signatureDeclarations: MethodDeclaration[] = [];
+                for (let i = 0; i < signatures.length; i++) {
+                    const signature = signatures[i];
+                    const methodDeclaration = signatureToMethodDeclaration(signature, enclosingDeclaration);
+                    if (methodDeclaration) {
+                        signatureDeclarations.push(methodDeclaration);
+                    }
+                }
+
+                if (declarations.length > signatures.length) {
+                    const signature = checker.getSignatureFromDeclaration(declarations[declarations.length - 1] as SignatureDeclaration);
+                    const methodDeclaration = signatureToMethodDeclaration(signature, enclosingDeclaration, createStubbedMethodBody());
+                    if (methodDeclaration) {
+                        signatureDeclarations.push(methodDeclaration);
+                    }
+                }
+                else {
+                    Debug.assert(declarations.length === signatures.length);
+                    const methodImplementingSignatures = createMethodImplementingSignatures(signatures, name, optional, modifiers);
+                    signatureDeclarations.push(methodImplementingSignatures);
+                }
+                return signatureDeclarations;
+            default:
+                return undefined;
+        }
+
+        function signatureToMethodDeclaration(signature: Signature, enclosingDeclaration: Node, body?: Block) {
+            const signatureDeclaration = <MethodDeclaration>checker.signatureToSignatureDeclaration(signature, SyntaxKind.MethodDeclaration, enclosingDeclaration, NodeBuilderFlags.SuppressAnyReturnType);
+            if (signatureDeclaration) {
+                signatureDeclaration.decorators = undefined;
+                signatureDeclaration.modifiers = modifiers;
+                signatureDeclaration.name = name;
+                signatureDeclaration.questionToken = optional ? createToken(SyntaxKind.QuestionToken) : undefined;
+                signatureDeclaration.body = body;
+            }
+            return signatureDeclaration;
+        }
+    }
+
+    export function createMethodFromCallExpression(callExpression: CallExpression, methodName: string, includeTypeScriptSyntax: boolean, makeStatic: boolean): MethodDeclaration {
+        const parameters = createDummyParameters(callExpression.arguments.length, /*names*/ undefined, /*minArgumentCount*/ undefined, includeTypeScriptSyntax);
+
+        let typeParameters: TypeParameterDeclaration[];
+        if (includeTypeScriptSyntax) {
+            const typeArgCount = length(callExpression.typeArguments);
+            for (let i = 0; i < typeArgCount; i++) {
+                const name = typeArgCount < 8 ? String.fromCharCode(CharacterCodes.T + i) : `T${i}`;
+                const typeParameter = createTypeParameterDeclaration(name, /*constraint*/ undefined, /*defaultType*/ undefined);
+                (typeParameters ? typeParameters : typeParameters = []).push(typeParameter);
+            }
+        }
+
+        const newMethod = createMethod(
+            /*decorators*/ undefined,
+            /*modifiers*/ makeStatic ? [createToken(SyntaxKind.StaticKeyword)] : undefined,
+            /*asteriskToken*/ undefined,
+            methodName,
+            /*questionToken*/ undefined,
+            typeParameters,
+            parameters,
+            /*type*/ includeTypeScriptSyntax ? createKeywordTypeNode(SyntaxKind.AnyKeyword) : undefined,
+            createStubbedMethodBody()
+        );
+        return newMethod;
+    }
+
+    function createDummyParameters(argCount: number,  names: string[] | undefined, minArgumentCount: number | undefined, addAnyType: boolean) {
+        const parameters: ParameterDeclaration[] = [];
+        for (let i = 0; i < argCount; i++) {
+            const newParameter = createParameter(
+                /*decorators*/ undefined,
+                /*modifiers*/ undefined,
+                /*dotDotDotToken*/ undefined,
+                /*name*/ names && names[i] || `arg${i}`,
+                /*questionToken*/ minArgumentCount !== undefined && i >= minArgumentCount ? createToken(SyntaxKind.QuestionToken) : undefined,
+                /*type*/ addAnyType ? createKeywordTypeNode(SyntaxKind.AnyKeyword) : undefined,
+                /*initializer*/ undefined);
+            parameters.push(newParameter);
+        }
+
+        return parameters;
+    }
+
+    function createMethodImplementingSignatures(signatures: Signature[], name: PropertyName, optional: boolean, modifiers: Modifier[] | undefined): MethodDeclaration {
+        /** This is *a* signature with the maximal number of arguments,
+         * such that if there is a "maximal" signature without rest arguments,
+         * this is one of them.
+         */
+        let maxArgsSignature = signatures[0];
+        let minArgumentCount = signatures[0].minArgumentCount;
+        let someSigHasRestParameter = false;
+        for (let i = 0; i < signatures.length; i++) {
+            const sig = signatures[i];
+            minArgumentCount = Math.min(sig.minArgumentCount, minArgumentCount);
+            if (sig.hasRestParameter) {
+                someSigHasRestParameter = true;
+            }
+            if (sig.parameters.length >= maxArgsSignature.parameters.length && (!sig.hasRestParameter || maxArgsSignature.hasRestParameter)) {
+                maxArgsSignature = sig;
+            }
+        }
+        const maxNonRestArgs = maxArgsSignature.parameters.length - (maxArgsSignature.hasRestParameter ? 1 : 0);
+        const maxArgsParameterSymbolNames = maxArgsSignature.parameters.map(symbol => symbol.getName());
+
+        const parameters = createDummyParameters(maxNonRestArgs, maxArgsParameterSymbolNames, minArgumentCount, /*addAnyType*/ true);
+
+        if (someSigHasRestParameter) {
+            const anyArrayType = createArrayTypeNode(createKeywordTypeNode(SyntaxKind.AnyKeyword));
+            const restParameter = createParameter(
+                /*decorators*/ undefined,
+                /*modifiers*/ undefined,
+                createToken(SyntaxKind.DotDotDotToken),
+                maxArgsParameterSymbolNames[maxNonRestArgs] || "rest",
+                /*questionToken*/ maxNonRestArgs >= minArgumentCount ? createToken(SyntaxKind.QuestionToken) : undefined,
+                anyArrayType,
+                /*initializer*/ undefined);
+            parameters.push(restParameter);
+        }
+
+        return createStubbedMethod(
+            modifiers,
+            name,
+            optional,
+            /*typeParameters*/ undefined,
+            parameters,
+            /*returnType*/ undefined);
+    }
+
+    export function createStubbedMethod(modifiers: Modifier[], name: PropertyName, optional: boolean, typeParameters: TypeParameterDeclaration[] | undefined, parameters: ParameterDeclaration[], returnType: TypeNode | undefined) {
+        return createMethod(
+            /*decorators*/ undefined,
+            modifiers,
+            /*asteriskToken*/ undefined,
+            name,
+            optional ? createToken(SyntaxKind.QuestionToken) : undefined,
+            typeParameters,
+            parameters,
+            returnType,
+            createStubbedMethodBody());
+    }
+
+    function createStubbedMethodBody() {
+        return createBlock(
+            [createThrow(
+                createNew(
+                    createIdentifier("Error"),
+                    /*typeArguments*/ undefined,
+                    [createLiteral("Method not implemented.")]))],
+            /*multiline*/ true);
+    }
+
+    function createVisibilityModifier(flags: ModifierFlags) {
+        if (flags & ModifierFlags.Public) {
+            return createToken(SyntaxKind.PublicKeyword);
+        }
+        else if (flags & ModifierFlags.Protected) {
+            return createToken(SyntaxKind.ProtectedKeyword);
+        }
+        return undefined;
+    }
+}
diff --git a/src/services/codefixes/importFixes.ts b/src/services/codefixes/importFixes.ts
new file mode 100644
index 0000000..c2d26da
--- /dev/null
+++ b/src/services/codefixes/importFixes.ts
@@ -0,0 +1,595 @@
+/* @internal */
+namespace ts.codefix {
+    registerCodeFix({
+        errorCodes: [
+            Diagnostics.Cannot_find_name_0.code,
+            Diagnostics.Cannot_find_name_0_Did_you_mean_1.code,
+            Diagnostics.Cannot_find_namespace_0.code,
+            Diagnostics._0_refers_to_a_UMD_global_but_the_current_file_is_a_module_Consider_adding_an_import_instead.code
+        ],
+        getCodeActions: getImportCodeActions
+    });
+
+    type ImportCodeActionKind = "CodeChange" | "InsertingIntoExistingImport" | "NewImport";
+    interface ImportCodeAction extends CodeAction {
+        kind: ImportCodeActionKind;
+        moduleSpecifier?: string;
+    }
+
+    enum ModuleSpecifierComparison {
+        Better,
+        Equal,
+        Worse
+    }
+
+    class ImportCodeActionMap {
+        private symbolIdToActionMap: ImportCodeAction[][] = [];
+
+        addAction(symbolId: number, newAction: ImportCodeAction) {
+            if (!newAction) {
+                return;
+            }
+
+            const actions = this.symbolIdToActionMap[symbolId];
+            if (!actions) {
+                this.symbolIdToActionMap[symbolId] = [newAction];
+                return;
+            }
+
+            if (newAction.kind === "CodeChange") {
+                actions.push(newAction);
+                return;
+            }
+
+            const updatedNewImports: ImportCodeAction[] = [];
+            for (const existingAction of this.symbolIdToActionMap[symbolId]) {
+                if (existingAction.kind === "CodeChange") {
+                    // only import actions should compare
+                    updatedNewImports.push(existingAction);
+                    continue;
+                }
+
+                switch (this.compareModuleSpecifiers(existingAction.moduleSpecifier, newAction.moduleSpecifier)) {
+                    case ModuleSpecifierComparison.Better:
+                        // the new one is not worth considering if it is a new import.
+                        // However if it is instead a insertion into existing import, the user might want to use
+                        // the module specifier even it is worse by our standards. So keep it.
+                        if (newAction.kind === "NewImport") {
+                            return;
+                        }
+                        // falls through
+                    case ModuleSpecifierComparison.Equal:
+                        // the current one is safe. But it is still possible that the new one is worse
+                        // than another existing one. For example, you may have new imports from "./foo/bar"
+                        // and "bar", when the new one is "bar/bar2" and the current one is "./foo/bar". The new
+                        // one and the current one are not comparable (one relative path and one absolute path),
+                        // but the new one is worse than the other one, so should not add to the list.
+                        updatedNewImports.push(existingAction);
+                        break;
+                    case ModuleSpecifierComparison.Worse:
+                        // the existing one is worse, remove from the list.
+                        continue;
+                }
+            }
+            // if we reach here, it means the new one is better or equal to all of the existing ones.
+            updatedNewImports.push(newAction);
+            this.symbolIdToActionMap[symbolId] = updatedNewImports;
+        }
+
+        addActions(symbolId: number, newActions: ImportCodeAction[]) {
+            for (const newAction of newActions) {
+                this.addAction(symbolId, newAction);
+            }
+        }
+
+        getAllActions() {
+            let result: ImportCodeAction[] = [];
+            for (const key in this.symbolIdToActionMap) {
+                result = concatenate(result, this.symbolIdToActionMap[key]);
+            }
+            return result;
+        }
+
+        private compareModuleSpecifiers(moduleSpecifier1: string, moduleSpecifier2: string): ModuleSpecifierComparison {
+            if (moduleSpecifier1 === moduleSpecifier2) {
+                return ModuleSpecifierComparison.Equal;
+            }
+
+            // if moduleSpecifier1 (ms1) is a substring of ms2, then it is better
+            if (moduleSpecifier2.indexOf(moduleSpecifier1) === 0) {
+                return ModuleSpecifierComparison.Better;
+            }
+
+            if (moduleSpecifier1.indexOf(moduleSpecifier2) === 0) {
+                return ModuleSpecifierComparison.Worse;
+            }
+
+            // if both are relative paths, and ms1 has fewer levels, then it is better
+            if (isExternalModuleNameRelative(moduleSpecifier1) && isExternalModuleNameRelative(moduleSpecifier2)) {
+                const regex = new RegExp(directorySeparator, "g");
+                const moduleSpecifier1LevelCount = (moduleSpecifier1.match(regex) || []).length;
+                const moduleSpecifier2LevelCount = (moduleSpecifier2.match(regex) || []).length;
+
+                return moduleSpecifier1LevelCount < moduleSpecifier2LevelCount
+                    ? ModuleSpecifierComparison.Better
+                    : moduleSpecifier1LevelCount === moduleSpecifier2LevelCount
+                        ? ModuleSpecifierComparison.Equal
+                        : ModuleSpecifierComparison.Worse;
+            }
+
+            // the equal cases include when the two specifiers are not comparable.
+            return ModuleSpecifierComparison.Equal;
+        }
+    }
+
+    function getImportCodeActions(context: CodeFixContext): ImportCodeAction[] {
+        const sourceFile = context.sourceFile;
+        const checker = context.program.getTypeChecker();
+        const allSourceFiles = context.program.getSourceFiles();
+        const useCaseSensitiveFileNames = context.host.useCaseSensitiveFileNames ? context.host.useCaseSensitiveFileNames() : false;
+
+        const token = getTokenAtPosition(sourceFile, context.span.start, /*includeJsDocComment*/ false);
+        const name = token.getText();
+        const symbolIdActionMap = new ImportCodeActionMap();
+
+        // this is a module id -> module import declaration map
+        const cachedImportDeclarations: (ImportDeclaration | ImportEqualsDeclaration)[][] = [];
+        let lastImportDeclaration: Node;
+
+        const currentTokenMeaning = getMeaningFromLocation(token);
+        if (context.errorCode === Diagnostics._0_refers_to_a_UMD_global_but_the_current_file_is_a_module_Consider_adding_an_import_instead.code) {
+            const umdSymbol = checker.getSymbolAtLocation(token);
+            let symbol: ts.Symbol;
+            let symbolName: string;
+            if (umdSymbol.flags & ts.SymbolFlags.Alias) {
+                symbol = checker.getAliasedSymbol(umdSymbol);
+                symbolName = name;
+            }
+            else if (isJsxOpeningLikeElement(token.parent) && token.parent.tagName === token) {
+                // The error wasn't for the symbolAtLocation, it was for the JSX tag itself, which needs access to e.g. `React`.
+                symbol = checker.getAliasedSymbol(checker.resolveNameAtLocation(token, checker.getJsxNamespace(), SymbolFlags.Value));
+                symbolName = symbol.name;
+            }
+            else {
+                Debug.fail("Either the symbol or the JSX namespace should be a UMD global if we got here");
+            }
+
+            return getCodeActionForImport(symbol, symbolName, /*isDefault*/ false, /*isNamespaceImport*/ true);
+        }
+
+        const candidateModules = checker.getAmbientModules();
+        for (const otherSourceFile of allSourceFiles) {
+            if (otherSourceFile !== sourceFile && isExternalOrCommonJsModule(otherSourceFile)) {
+                candidateModules.push(otherSourceFile.symbol);
+            }
+        }
+
+        for (const moduleSymbol of candidateModules) {
+            context.cancellationToken.throwIfCancellationRequested();
+
+            // check the default export
+            const defaultExport = checker.tryGetMemberInModuleExports("default", moduleSymbol);
+            if (defaultExport) {
+                const localSymbol = getLocalSymbolForExportDefault(defaultExport);
+                if (localSymbol && localSymbol.name === name && checkSymbolHasMeaning(localSymbol, currentTokenMeaning)) {
+                    // check if this symbol is already used
+                    const symbolId = getUniqueSymbolId(localSymbol);
+                    symbolIdActionMap.addActions(symbolId, getCodeActionForImport(moduleSymbol, name, /*isDefault*/ true));
+                }
+            }
+
+            // check exports with the same name
+            const exportSymbolWithIdenticalName = checker.tryGetMemberInModuleExports(name, moduleSymbol);
+            if (exportSymbolWithIdenticalName && checkSymbolHasMeaning(exportSymbolWithIdenticalName, currentTokenMeaning)) {
+                const symbolId = getUniqueSymbolId(exportSymbolWithIdenticalName);
+                symbolIdActionMap.addActions(symbolId, getCodeActionForImport(moduleSymbol, name));
+            }
+        }
+
+        return symbolIdActionMap.getAllActions();
+
+        function getImportDeclarations(moduleSymbol: Symbol) {
+            const moduleSymbolId = getUniqueSymbolId(moduleSymbol);
+
+            const cached = cachedImportDeclarations[moduleSymbolId];
+            if (cached) {
+                return cached;
+            }
+
+            const existingDeclarations: (ImportDeclaration | ImportEqualsDeclaration)[] = [];
+            for (const importModuleSpecifier of sourceFile.imports) {
+                const importSymbol = checker.getSymbolAtLocation(importModuleSpecifier);
+                if (importSymbol === moduleSymbol) {
+                    existingDeclarations.push(getImportDeclaration(importModuleSpecifier));
+                }
+            }
+            cachedImportDeclarations[moduleSymbolId] = existingDeclarations;
+            return existingDeclarations;
+
+            function getImportDeclaration(moduleSpecifier: LiteralExpression) {
+                let node: Node = moduleSpecifier;
+                while (node) {
+                    if (node.kind === SyntaxKind.ImportDeclaration) {
+                        return <ImportDeclaration>node;
+                    }
+                    if (node.kind === SyntaxKind.ImportEqualsDeclaration) {
+                        return <ImportEqualsDeclaration>node;
+                    }
+                    node = node.parent;
+                }
+                return undefined;
+            }
+        }
+
+        function getUniqueSymbolId(symbol: Symbol) {
+            if (symbol.flags & SymbolFlags.Alias) {
+                return getSymbolId(checker.getAliasedSymbol(symbol));
+            }
+            return getSymbolId(symbol);
+        }
+
+        function checkSymbolHasMeaning(symbol: Symbol, meaning: SemanticMeaning) {
+            const declarations = symbol.getDeclarations();
+            return declarations ? some(symbol.declarations, decl => !!(getMeaningFromDeclaration(decl) & meaning)) : false;
+        }
+
+        function getCodeActionForImport(moduleSymbol: Symbol, symbolName: string, isDefault?: boolean, isNamespaceImport?: boolean): ImportCodeAction[] {
+            const existingDeclarations = getImportDeclarations(moduleSymbol);
+            if (existingDeclarations.length > 0) {
+                // With an existing import statement, there are more than one actions the user can do.
+                return getCodeActionsForExistingImport(existingDeclarations);
+            }
+            else {
+                return [getCodeActionForNewImport()];
+            }
+
+            function getCodeActionsForExistingImport(declarations: (ImportDeclaration | ImportEqualsDeclaration)[]): ImportCodeAction[] {
+                const actions: ImportCodeAction[] = [];
+
+                // It is possible that multiple import statements with the same specifier exist in the file.
+                // e.g.
+                //
+                //     import * as ns from "foo";
+                //     import { member1, member2 } from "foo";
+                //
+                //     member3/**/ <-- cusor here
+                //
+                // in this case we should provie 2 actions:
+                //     1. change "member3" to "ns.member3"
+                //     2. add "member3" to the second import statement's import list
+                // and it is up to the user to decide which one fits best.
+                let namespaceImportDeclaration: ImportDeclaration | ImportEqualsDeclaration;
+                let namedImportDeclaration: ImportDeclaration;
+                let existingModuleSpecifier: string;
+                for (const declaration of declarations) {
+                    if (declaration.kind === SyntaxKind.ImportDeclaration) {
+                        const namedBindings = declaration.importClause && declaration.importClause.namedBindings;
+                        if (namedBindings && namedBindings.kind === SyntaxKind.NamespaceImport) {
+                            // case:
+                            // import * as ns from "foo"
+                            namespaceImportDeclaration = declaration;
+                        }
+                        else {
+                            // cases:
+                            // import default from "foo"
+                            // import { bar } from "foo" or combination with the first one
+                            // import "foo"
+                            namedImportDeclaration = declaration;
+                        }
+                        existingModuleSpecifier = declaration.moduleSpecifier.getText();
+                    }
+                    else {
+                        // case:
+                        // import foo = require("foo")
+                        namespaceImportDeclaration = declaration;
+                        existingModuleSpecifier = getModuleSpecifierFromImportEqualsDeclaration(declaration);
+                    }
+                }
+
+                if (namespaceImportDeclaration) {
+                    actions.push(getCodeActionForNamespaceImport(namespaceImportDeclaration));
+                }
+
+                if (!isNamespaceImport && namedImportDeclaration && namedImportDeclaration.importClause &&
+                    (namedImportDeclaration.importClause.name || namedImportDeclaration.importClause.namedBindings)) {
+                    /**
+                     * If the existing import declaration already has a named import list, just
+                     * insert the identifier into that list.
+                     */
+                    const fileTextChanges = getTextChangeForImportClause(namedImportDeclaration.importClause);
+                    const moduleSpecifierWithoutQuotes = stripQuotes(namedImportDeclaration.moduleSpecifier.getText());
+                    actions.push(createCodeAction(
+                        Diagnostics.Add_0_to_existing_import_declaration_from_1,
+                        [name, moduleSpecifierWithoutQuotes],
+                        fileTextChanges,
+                        "InsertingIntoExistingImport",
+                        moduleSpecifierWithoutQuotes
+                    ));
+                }
+                else {
+                    // we need to create a new import statement, but the existing module specifier can be reused.
+                    actions.push(getCodeActionForNewImport(existingModuleSpecifier));
+                }
+                return actions;
+
+                function getModuleSpecifierFromImportEqualsDeclaration(declaration: ImportEqualsDeclaration) {
+                    if (declaration.moduleReference && declaration.moduleReference.kind === SyntaxKind.ExternalModuleReference) {
+                        return declaration.moduleReference.expression.getText();
+                    }
+                    return declaration.moduleReference.getText();
+                }
+
+                function getTextChangeForImportClause(importClause: ImportClause): FileTextChanges[] {
+                    const importList = <NamedImports>importClause.namedBindings;
+                    const newImportSpecifier = createImportSpecifier(/*propertyName*/ undefined, createIdentifier(name));
+                    // case 1:
+                    // original text: import default from "module"
+                    // change to: import default, { name } from "module"
+                    // case 2:
+                    // original text: import {} from "module"
+                    // change to: import { name } from "module"
+                    if (!importList || importList.elements.length === 0) {
+                        const newImportClause = createImportClause(importClause.name, createNamedImports([newImportSpecifier]));
+                        return createChangeTracker().replaceNode(sourceFile, importClause, newImportClause).getChanges();
+                    }
+
+                    /**
+                     * If the import list has one import per line, preserve that. Otherwise, insert on same line as last element
+                     *     import {
+                     *         foo
+                     *     } from "./module";
+                     */
+                    return createChangeTracker().insertNodeInListAfter(
+                        sourceFile,
+                        importList.elements[importList.elements.length - 1],
+                        newImportSpecifier).getChanges();
+                }
+
+                function getCodeActionForNamespaceImport(declaration: ImportDeclaration | ImportEqualsDeclaration): ImportCodeAction {
+                    let namespacePrefix: string;
+                    if (declaration.kind === SyntaxKind.ImportDeclaration) {
+                        namespacePrefix = (<NamespaceImport>declaration.importClause.namedBindings).name.getText();
+                    }
+                    else {
+                        namespacePrefix = declaration.name.getText();
+                    }
+                    namespacePrefix = stripQuotes(namespacePrefix);
+
+                    /**
+                     * Cases:
+                     *     import * as ns from "mod"
+                     *     import default, * as ns from "mod"
+                     *     import ns = require("mod")
+                     *
+                     * Because there is no import list, we alter the reference to include the
+                     * namespace instead of altering the import declaration. For example, "foo" would
+                     * become "ns.foo"
+                     */
+                    return createCodeAction(
+                        Diagnostics.Change_0_to_1,
+                        [name, `${namespacePrefix}.${name}`],
+                        createChangeTracker().replaceNode(sourceFile, token, createPropertyAccess(createIdentifier(namespacePrefix), name)).getChanges(),
+                        "CodeChange"
+                    );
+                }
+            }
+
+            function getCodeActionForNewImport(moduleSpecifier?: string): ImportCodeAction {
+                if (!lastImportDeclaration) {
+                    // insert after any existing imports
+                    for (let i = sourceFile.statements.length - 1; i >= 0; i--) {
+                        const statement = sourceFile.statements[i];
+                        if (statement.kind === SyntaxKind.ImportEqualsDeclaration || statement.kind === SyntaxKind.ImportDeclaration) {
+                            lastImportDeclaration = statement;
+                            break;
+                        }
+                    }
+                }
+
+                const getCanonicalFileName = createGetCanonicalFileName(useCaseSensitiveFileNames);
+                const moduleSpecifierWithoutQuotes = stripQuotes(moduleSpecifier || getModuleSpecifierForNewImport());
+                const changeTracker = createChangeTracker();
+                const importClause = isDefault
+                    ? createImportClause(createIdentifier(symbolName), /*namedBindings*/ undefined)
+                    : isNamespaceImport
+                        ? createImportClause(/*name*/ undefined, createNamespaceImport(createIdentifier(symbolName)))
+                        : createImportClause(/*name*/ undefined, createNamedImports([createImportSpecifier(/*propertyName*/ undefined, createIdentifier(symbolName))]));
+                const importDecl = createImportDeclaration(/*decorators*/ undefined, /*modifiers*/ undefined, importClause, createLiteral(moduleSpecifierWithoutQuotes));
+                if (!lastImportDeclaration) {
+                    changeTracker.insertNodeAt(sourceFile, sourceFile.getStart(), importDecl, { suffix: `${context.newLineCharacter}${context.newLineCharacter}` });
+                }
+                else {
+                    changeTracker.insertNodeAfter(sourceFile, lastImportDeclaration, importDecl, { suffix: context.newLineCharacter });
+                }
+
+                // if this file doesn't have any import statements, insert an import statement and then insert a new line
+                // between the only import statement and user code. Otherwise just insert the statement because chances
+                // are there are already a new line seperating code and import statements.
+                return createCodeAction(
+                    Diagnostics.Import_0_from_1,
+                    [symbolName, `"${moduleSpecifierWithoutQuotes}"`],
+                    changeTracker.getChanges(),
+                    "NewImport",
+                    moduleSpecifierWithoutQuotes
+                );
+
+                function getModuleSpecifierForNewImport() {
+                    const fileName = sourceFile.fileName;
+                    const moduleFileName = moduleSymbol.valueDeclaration.getSourceFile().fileName;
+                    const sourceDirectory = getDirectoryPath(fileName);
+                    const options = context.program.getCompilerOptions();
+
+                    return tryGetModuleNameFromAmbientModule() ||
+                        tryGetModuleNameFromTypeRoots() ||
+                        tryGetModuleNameAsNodeModule() ||
+                        tryGetModuleNameFromBaseUrl() ||
+                        tryGetModuleNameFromRootDirs() ||
+                        removeFileExtension(getRelativePath(moduleFileName, sourceDirectory));
+
+                    function tryGetModuleNameFromAmbientModule(): string {
+                        const decl = moduleSymbol.valueDeclaration;
+                        if (isModuleDeclaration(decl) && isStringLiteral(decl.name)) {
+                            return decl.name.text;
+                        }
+                    }
+
+                    function tryGetModuleNameFromBaseUrl() {
+                        if (!options.baseUrl) {
+                            return undefined;
+                        }
+
+                        let relativeName = getRelativePathIfInDirectory(moduleFileName, options.baseUrl);
+                        if (!relativeName) {
+                            return undefined;
+                        }
+
+                        const relativeNameWithIndex = removeFileExtension(relativeName);
+                        relativeName = removeExtensionAndIndexPostFix(relativeName);
+
+                        if (options.paths) {
+                            for (const key in options.paths) {
+                                for (const pattern of options.paths[key]) {
+                                    const indexOfStar = pattern.indexOf("*");
+                                    if (indexOfStar === 0 && pattern.length === 1) {
+                                        continue;
+                                    }
+                                    else if (indexOfStar !== -1) {
+                                        const prefix = pattern.substr(0, indexOfStar);
+                                        const suffix = pattern.substr(indexOfStar + 1);
+                                        if (relativeName.length >= prefix.length + suffix.length &&
+                                            startsWith(relativeName, prefix) &&
+                                            endsWith(relativeName, suffix)) {
+                                            const matchedStar = relativeName.substr(prefix.length, relativeName.length - suffix.length);
+                                            return key.replace("\*", matchedStar);
+                                        }
+                                    }
+                                    else if (pattern === relativeName || pattern === relativeNameWithIndex) {
+                                        return key;
+                                    }
+                                }
+                            }
+                        }
+
+                        return relativeName;
+                    }
+
+                    function tryGetModuleNameFromRootDirs() {
+                        if (options.rootDirs) {
+                            const normalizedTargetPath = getPathRelativeToRootDirs(moduleFileName, options.rootDirs);
+                            const normalizedSourcePath = getPathRelativeToRootDirs(sourceDirectory, options.rootDirs);
+                            if (normalizedTargetPath !== undefined) {
+                                const relativePath = normalizedSourcePath !== undefined ? getRelativePath(normalizedTargetPath, normalizedSourcePath) : normalizedTargetPath;
+                                return removeFileExtension(relativePath);
+                            }
+                        }
+                        return undefined;
+                    }
+
+                    function tryGetModuleNameFromTypeRoots() {
+                        const typeRoots = getEffectiveTypeRoots(options, context.host);
+                        if (typeRoots) {
+                            const normalizedTypeRoots = map(typeRoots, typeRoot => toPath(typeRoot, /*basePath*/ undefined, getCanonicalFileName));
+                            for (const typeRoot of normalizedTypeRoots) {
+                                if (startsWith(moduleFileName, typeRoot)) {
+                                    const relativeFileName = moduleFileName.substring(typeRoot.length + 1);
+                                    return removeExtensionAndIndexPostFix(relativeFileName);
+                                }
+                            }
+                        }
+                    }
+
+                    function tryGetModuleNameAsNodeModule() {
+                        if (getEmitModuleResolutionKind(options) !== ModuleResolutionKind.NodeJs) {
+                            // nothing to do here
+                            return undefined;
+                        }
+
+                        const indexOfNodeModules = moduleFileName.indexOf("node_modules");
+                        if (indexOfNodeModules < 0) {
+                            return undefined;
+                        }
+
+                        let relativeFileName: string;
+                        if (sourceDirectory.indexOf(moduleFileName.substring(0, indexOfNodeModules - 1)) === 0) {
+                            // if node_modules folder is in this folder or any of its parent folder, no need to keep it.
+                            relativeFileName = moduleFileName.substring(indexOfNodeModules + 13 /* "node_modules\".length */);
+                        }
+                        else {
+                            relativeFileName = getRelativePath(moduleFileName, sourceDirectory);
+                        }
+
+                        relativeFileName = removeFileExtension(relativeFileName);
+                        if (endsWith(relativeFileName, "/index")) {
+                            relativeFileName = getDirectoryPath(relativeFileName);
+                        }
+                        else {
+                            try {
+                                const moduleDirectory = getDirectoryPath(moduleFileName);
+                                const packageJsonContent = JSON.parse(context.host.readFile(combinePaths(moduleDirectory, "package.json")));
+                                if (packageJsonContent) {
+                                    const mainFile = packageJsonContent.main || packageJsonContent.typings;
+                                    if (mainFile) {
+                                        const mainExportFile = toPath(mainFile, moduleDirectory, getCanonicalFileName);
+                                        if (removeFileExtension(mainExportFile) === removeFileExtension(moduleFileName)) {
+                                            relativeFileName = getDirectoryPath(relativeFileName);
+                                        }
+                                    }
+                                }
+                            }
+                            catch (e) { }
+                        }
+
+                        return getPackageNameFromAtTypesDirectory(relativeFileName);
+                    }
+                }
+
+                function getPathRelativeToRootDirs(path: string, rootDirs: string[]) {
+                    for (const rootDir of rootDirs) {
+                        const relativeName = getRelativePathIfInDirectory(path, rootDir);
+                        if (relativeName !== undefined) {
+                            return relativeName;
+                        }
+                    }
+                    return undefined;
+                }
+
+                function removeExtensionAndIndexPostFix(fileName: string) {
+                    fileName = removeFileExtension(fileName);
+                    if (endsWith(fileName, "/index")) {
+                        fileName = fileName.substr(0, fileName.length - 6/* "/index".length */);
+                    }
+                    return fileName;
+                }
+
+                function getRelativePathIfInDirectory(path: string, directoryPath: string) {
+                    const relativePath = getRelativePathToDirectoryOrUrl(directoryPath, path, directoryPath, getCanonicalFileName, /*isAbsolutePathAnUrl*/ false);
+                    return isRootedDiskPath(relativePath) || startsWith(relativePath, "..") ? undefined : relativePath;
+                }
+
+                function getRelativePath(path: string, directoryPath: string) {
+                    const relativePath = getRelativePathToDirectoryOrUrl(directoryPath, path, directoryPath, getCanonicalFileName, /*isAbsolutePathAnUrl*/ false);
+                    return moduleHasNonRelativeName(relativePath) ? "./" + relativePath : relativePath;
+                }
+            }
+
+        }
+
+        function createChangeTracker() {
+            return textChanges.ChangeTracker.fromCodeFixContext(context);
+        }
+
+        function createCodeAction(
+            description: DiagnosticMessage,
+            diagnosticArgs: string[],
+            changes: FileTextChanges[],
+            kind: ImportCodeActionKind,
+            moduleSpecifier?: string): ImportCodeAction {
+            return {
+                description: formatMessage.apply(undefined, [undefined, description].concat(<any[]>diagnosticArgs)),
+                changes,
+                kind,
+                moduleSpecifier
+            };
+        }
+    }
+}
diff --git a/src/services/completions.ts b/src/services/completions.ts
index a437179..8492c2d 100644
--- a/src/services/completions.ts
+++ b/src/services/completions.ts
@@ -1,12 +1,22 @@
+/// <reference path="./pathCompletions.ts" />
+
 /* @internal */
 namespace ts.Completions {
-    export function getCompletionsAtPosition(host: LanguageServiceHost, typeChecker: TypeChecker, log: (message: string) => void, compilerOptions: CompilerOptions, sourceFile: SourceFile, position: number): CompletionInfo {
+    export type Log = (message: string) => void;
+
+    const enum KeywordCompletionFilters {
+        None,
+        ClassElementKeywords,           // Keywords at class keyword
+        ConstructorParameterKeywords,   // Keywords at constructor parameter
+    }
+
+    export function getCompletionsAtPosition(host: LanguageServiceHost, typeChecker: TypeChecker, log: Log, compilerOptions: CompilerOptions, sourceFile: SourceFile, position: number): CompletionInfo | undefined {
         if (isInReferenceComment(sourceFile, position)) {
-            return getTripleSlashReferenceCompletion(sourceFile, position);
+            return PathCompletions.getTripleSlashReferenceCompletion(sourceFile, position, compilerOptions, host);
         }
 
         if (isInString(sourceFile, position)) {
-            return getStringLiteralCompletionEntries(sourceFile, position);
+            return getStringLiteralCompletionEntries(sourceFile, position, typeChecker, compilerOptions, host, log);
         }
 
         const completionData = getCompletionData(typeChecker, log, sourceFile, position);
@@ -14,702 +24,275 @@ namespace ts.Completions {
             return undefined;
         }
 
-        const { symbols, isMemberCompletion, isNewIdentifierLocation, location, isJsDocTagName } = completionData;
+        const { symbols, isGlobalCompletion, isMemberCompletion, isNewIdentifierLocation, location, request, keywordFilters } = completionData;
 
-        if (isJsDocTagName) {
-            // If the current position is a jsDoc tag name, only tag names should be provided for completion
-            return { isMemberCompletion: false, isNewIdentifierLocation: false, entries: JsDoc.getAllJsDocCompletionEntries() };
+        if (sourceFile.languageVariant === LanguageVariant.JSX &&
+            location && location.parent && location.parent.kind === SyntaxKind.JsxClosingElement) {
+            // In the TypeScript JSX element, if such element is not defined. When users query for completion at closing tag,
+            // instead of simply giving unknown value, the completion will return the tag-name of an associated opening-element.
+            // For example:
+            //     var x = <div> </ /*1*/>  completion list at "1" will contain "div" with type any
+            const tagName = (<JsxElement>location.parent.parent).openingElement.tagName;
+            return { isGlobalCompletion: false, isMemberCompletion: true, isNewIdentifierLocation: false,
+                entries: [{
+                    name: (<JsxTagNameExpression>tagName).getFullText(),
+                    kind: ScriptElementKind.classElement,
+                    kindModifiers: undefined,
+                    sortText: "0",
+                }]};
+        }
+
+        if (request) {
+            const entries = request.kind === "JsDocTagName"
+                // If the current position is a jsDoc tag name, only tag names should be provided for completion
+                ? JsDoc.getJSDocTagNameCompletions()
+                : request.kind === "JsDocTag"
+                // If the current position is a jsDoc tag, only tags should be provided for completion
+                ? JsDoc.getJSDocTagCompletions()
+                : JsDoc.getJSDocParameterNameCompletions(request.tag);
+            return { isGlobalCompletion: false, isMemberCompletion: false, isNewIdentifierLocation: false,  entries };
         }
 
         const entries: CompletionEntry[] = [];
 
         if (isSourceFileJavaScript(sourceFile)) {
-            const uniqueNames = getCompletionEntriesFromSymbols(symbols, entries, location, /*performCharacterChecks*/ false);
-            addRange(entries, getJavaScriptCompletionEntries(sourceFile, location.pos, uniqueNames));
+            const uniqueNames = getCompletionEntriesFromSymbols(symbols, entries, location, /*performCharacterChecks*/ true, typeChecker, compilerOptions.target, log);
+            addRange(entries, getJavaScriptCompletionEntries(sourceFile, location.pos, uniqueNames, compilerOptions.target));
         }
         else {
-            if (!symbols || symbols.length === 0) {
-                if (sourceFile.languageVariant === LanguageVariant.JSX &&
-                    location.parent && location.parent.kind === SyntaxKind.JsxClosingElement) {
-                    // In the TypeScript JSX element, if such element is not defined. When users query for completion at closing tag,
-                    // instead of simply giving unknown value, the completion will return the tag-name of an associated opening-element.
-                    // For example:
-                    //     var x = <div> </ /*1*/>  completion list at "1" will contain "div" with type any
-                    const tagName = (<JsxElement>location.parent.parent).openingElement.tagName;
-                    entries.push({
-                        name: (<Identifier>tagName).text,
-                        kind: undefined,
-                        kindModifiers: undefined,
-                        sortText: "0",
-                    });
-                }
-                else {
+            if ((!symbols || symbols.length === 0) && keywordFilters === KeywordCompletionFilters.None) {
                     return undefined;
-                }
             }
 
-            getCompletionEntriesFromSymbols(symbols, entries, location, /*performCharacterChecks*/ true);
-        }
-
-        // Add keywords if this is not a member completion list
-        if (!isMemberCompletion && !isJsDocTagName) {
-            addRange(entries, keywordCompletions);
-        }
-
-        return { isMemberCompletion, isNewIdentifierLocation: isNewIdentifierLocation, entries };
-
-        function getJavaScriptCompletionEntries(sourceFile: SourceFile, position: number, uniqueNames: Map<string>): CompletionEntry[] {
-            const entries: CompletionEntry[] = [];
-
-            const nameTable = getNameTable(sourceFile);
-            for (const name in nameTable) {
-                // Skip identifiers produced only from the current location
-                if (nameTable[name] === position) {
-                    continue;
-                }
-
-                if (!uniqueNames[name]) {
-                    uniqueNames[name] = name;
-                    const displayName = getCompletionEntryDisplayName(unescapeIdentifier(name), compilerOptions.target, /*performCharacterChecks*/ true);
-                    if (displayName) {
-                        const entry = {
-                            name: displayName,
-                            kind: ScriptElementKind.warning,
-                            kindModifiers: "",
-                            sortText: "1"
-                        };
-                        entries.push(entry);
-                    }
-                }
-            }
-
-            return entries;
-        }
-
-        function createCompletionEntry(symbol: Symbol, location: Node, performCharacterChecks: boolean): CompletionEntry {
-            // Try to get a valid display name for this symbol, if we could not find one, then ignore it.
-            // We would like to only show things that can be added after a dot, so for instance numeric properties can
-            // not be accessed with a dot (a.1 <- invalid)
-            const displayName = getCompletionEntryDisplayNameForSymbol(typeChecker, symbol, compilerOptions.target, performCharacterChecks, location);
-            if (!displayName) {
-                return undefined;
-            }
-
-            // TODO(drosen): Right now we just permit *all* semantic meanings when calling
-            // 'getSymbolKind' which is permissible given that it is backwards compatible; but
-            // really we should consider passing the meaning for the node so that we don't report
-            // that a suggestion for a value is an interface.  We COULD also just do what
-            // 'getSymbolModifiers' does, which is to use the first declaration.
-
-            // Use a 'sortText' of 0' so that all symbol completion entries come before any other
-            // entries (like JavaScript identifier entries).
-            return {
-                name: displayName,
-                kind: SymbolDisplay.getSymbolKind(typeChecker, symbol, location),
-                kindModifiers: SymbolDisplay.getSymbolModifiers(symbol),
-                sortText: "0",
-            };
-
-        }
-
-        function getCompletionEntriesFromSymbols(symbols: Symbol[], entries: CompletionEntry[], location: Node, performCharacterChecks: boolean): Map<string> {
-            const start = timestamp();
-            const uniqueNames = createMap<string>();
-            if (symbols) {
-                for (const symbol of symbols) {
-                    const entry = createCompletionEntry(symbol, location, performCharacterChecks);
-                    if (entry) {
-                        const id = escapeIdentifier(entry.name);
-                        if (!uniqueNames[id]) {
-                            entries.push(entry);
-                            uniqueNames[id] = id;
-                        }
-                    }
-                }
-            }
-
-            log("getCompletionsAtPosition: getCompletionEntriesFromSymbols: " + (timestamp() - start));
-            return uniqueNames;
-        }
-
-        function getStringLiteralCompletionEntries(sourceFile: SourceFile, position: number) {
-            const node = findPrecedingToken(position, sourceFile);
-            if (!node || node.kind !== SyntaxKind.StringLiteral) {
-                return undefined;
-            }
-
-            if (node.parent.kind === SyntaxKind.PropertyAssignment && node.parent.parent.kind === SyntaxKind.ObjectLiteralExpression) {
-                // Get quoted name of properties of the object literal expression
-                // i.e. interface ConfigFiles {
-                //          'jspm:dev': string
-                //      }
-                //      let files: ConfigFiles = {
-                //          '/*completion position*/'
-                //      }
-                //
-                //      function foo(c: ConfigFiles) {}
-                //      foo({
-                //          '/*completion position*/'
-                //      });
-                return getStringLiteralCompletionEntriesFromPropertyAssignment(<ObjectLiteralElement>node.parent);
-            }
-            else if (isElementAccessExpression(node.parent) && node.parent.argumentExpression === node) {
-                // Get all names of properties on the expression
-                // i.e. interface A {
-                //      'prop1': string
-                // }
-                // let a: A;
-                // a['/*completion position*/']
-                return getStringLiteralCompletionEntriesFromElementAccess(node.parent);
-            }
-            else if (node.parent.kind === SyntaxKind.ImportDeclaration || isExpressionOfExternalModuleImportEqualsDeclaration(node) || isRequireCall(node.parent, false)) {
-                // Get all known external module names or complete a path to a module
-                // i.e. import * as ns from "/*completion position*/";
-                //      import x = require("/*completion position*/");
-                //      var y = require("/*completion position*/");
-                return getStringLiteralCompletionEntriesFromModuleNames(<StringLiteral>node);
-            }
-            else {
-                const argumentInfo = SignatureHelp.getContainingArgumentInfo(node, position, sourceFile);
-                if (argumentInfo) {
-                    // Get string literal completions from specialized signatures of the target
-                    // i.e. declare function f(a: 'A');
-                    // f("/*completion position*/")
-                    return getStringLiteralCompletionEntriesFromCallExpression(argumentInfo, node);
-                }
-
-                // Get completion for string literal from string literal type
-                // i.e. var x: "hi" | "hello" = "/*completion position*/"
-                return getStringLiteralCompletionEntriesFromContextualType(<StringLiteral>node);
-            }
-        }
-
-        function getStringLiteralCompletionEntriesFromPropertyAssignment(element: ObjectLiteralElement) {
-            const type = typeChecker.getContextualType((<ObjectLiteralExpression>element.parent));
-            const entries: CompletionEntry[] = [];
-            if (type) {
-                getCompletionEntriesFromSymbols(type.getApparentProperties(), entries, element, /*performCharacterChecks*/false);
-                if (entries.length) {
-                    return { isMemberCompletion: true, isNewIdentifierLocation: true, entries };
-                }
-            }
+            getCompletionEntriesFromSymbols(symbols, entries, location, /*performCharacterChecks*/ true, typeChecker, compilerOptions.target, log);
         }
 
-        function getStringLiteralCompletionEntriesFromCallExpression(argumentInfo: SignatureHelp.ArgumentListInfo, location: Node) {
-            const candidates: Signature[] = [];
-            const entries: CompletionEntry[] = [];
-
-            typeChecker.getResolvedSignature(argumentInfo.invocation, candidates);
-
-            for (const candidate of candidates) {
-                if (candidate.parameters.length > argumentInfo.argumentIndex) {
-                    const parameter = candidate.parameters[argumentInfo.argumentIndex];
-                    addStringLiteralCompletionsFromType(typeChecker.getTypeAtLocation(parameter.valueDeclaration), entries);
-                }
-            }
+        // TODO add filter for keyword based on type/value/namespace and also location
 
-            if (entries.length) {
-                return { isMemberCompletion: false, isNewIdentifierLocation: true, entries };
-            }
-
-            return undefined;
+        // Add all keywords if
+        // - this is not a member completion list (all the keywords)
+        // - other filters are enabled in required scenario so add those keywords
+        if (keywordFilters !== KeywordCompletionFilters.None || !isMemberCompletion) {
+            addRange(entries, getKeywordCompletions(keywordFilters));
         }
 
-        function getStringLiteralCompletionEntriesFromElementAccess(node: ElementAccessExpression) {
-            const type = typeChecker.getTypeAtLocation(node.expression);
-            const entries: CompletionEntry[] = [];
-            if (type) {
-                getCompletionEntriesFromSymbols(type.getApparentProperties(), entries, node, /*performCharacterChecks*/false);
-                if (entries.length) {
-                    return { isMemberCompletion: true, isNewIdentifierLocation: true, entries };
-                }
-            }
-            return undefined;
-        }
+        return { isGlobalCompletion, isMemberCompletion, isNewIdentifierLocation: isNewIdentifierLocation, entries };
+    }
 
-        function getStringLiteralCompletionEntriesFromContextualType(node: StringLiteral) {
-            const type = typeChecker.getContextualType(node);
-            if (type) {
-                const entries: CompletionEntry[] = [];
-                addStringLiteralCompletionsFromType(type, entries);
-                if (entries.length) {
-                    return { isMemberCompletion: false, isNewIdentifierLocation: false, entries };
-                }
-            }
-            return undefined;
-        }
+    function getJavaScriptCompletionEntries(sourceFile: SourceFile, position: number, uniqueNames: Map<string>, target: ScriptTarget): CompletionEntry[] {
+        const entries: CompletionEntry[] = [];
 
-        function addStringLiteralCompletionsFromType(type: Type, result: CompletionEntry[]): void {
-            if (!type) {
+        const nameTable = getNameTable(sourceFile);
+        nameTable.forEach((pos, name) => {
+            // Skip identifiers produced only from the current location
+            if (pos === position) {
                 return;
             }
-            if (type.flags & TypeFlags.Union) {
-                forEach((<UnionType>type).types, t => addStringLiteralCompletionsFromType(t, result));
-            }
-            else {
-                if (type.flags & TypeFlags.StringLiteral) {
-                    result.push({
-                        name: (<LiteralType>type).text,
-                        kindModifiers: ScriptElementKindModifier.none,
-                        kind: ScriptElementKind.variableElement,
-                        sortText: "0"
-                    });
-                }
-            }
-        }
 
-        function getStringLiteralCompletionEntriesFromModuleNames(node: StringLiteral): CompletionInfo {
-            const literalValue = normalizeSlashes(node.text);
-
-            const scriptPath = node.getSourceFile().path;
-            const scriptDirectory = getDirectoryPath(scriptPath);
-
-            const span = getDirectoryFragmentTextSpan((<StringLiteral>node).text, node.getStart() + 1);
-            let entries: CompletionEntry[];
-            if (isPathRelativeToScript(literalValue) || isRootedDiskPath(literalValue)) {
-                if (compilerOptions.rootDirs) {
-                    entries = getCompletionEntriesForDirectoryFragmentWithRootDirs(
-                        compilerOptions.rootDirs, literalValue, scriptDirectory, getSupportedExtensions(compilerOptions), /*includeExtensions*/false, span, scriptPath);
-                }
-                else {
-                    entries = getCompletionEntriesForDirectoryFragment(
-                        literalValue, scriptDirectory, getSupportedExtensions(compilerOptions), /*includeExtensions*/false, span, scriptPath);
-                }
-            }
-            else {
-                // Check for node modules
-                entries = getCompletionEntriesForNonRelativeModules(literalValue, scriptDirectory, span);
-            }
-            return {
-                isMemberCompletion: false,
-                isNewIdentifierLocation: true,
-                entries
-            };
-        }
-
-        /**
-         * Takes a script path and returns paths for all potential folders that could be merged with its
-         * containing folder via the "rootDirs" compiler option
-         */
-        function getBaseDirectoriesFromRootDirs(rootDirs: string[], basePath: string, scriptPath: string, ignoreCase: boolean): string[] {
-            // Make all paths absolute/normalized if they are not already
-            rootDirs = map(rootDirs, rootDirectory => normalizePath(isRootedDiskPath(rootDirectory) ? rootDirectory : combinePaths(basePath, rootDirectory)));
-
-            // Determine the path to the directory containing the script relative to the root directory it is contained within
-            let relativeDirectory: string;
-            for (const rootDirectory of rootDirs) {
-                if (containsPath(rootDirectory, scriptPath, basePath, ignoreCase)) {
-                    relativeDirectory = scriptPath.substr(rootDirectory.length);
-                    break;
+            if (!uniqueNames.get(name)) {
+                uniqueNames.set(name, name);
+                const displayName = getCompletionEntryDisplayName(unescapeIdentifier(name), target, /*performCharacterChecks*/ true);
+                if (displayName) {
+                    const entry = {
+                        name: displayName,
+                        kind: ScriptElementKind.warning,
+                        kindModifiers: "",
+                        sortText: "1"
+                    };
+                    entries.push(entry);
                 }
             }
+        });
 
-            // Now find a path for each potential directory that is to be merged with the one containing the script
-            return deduplicate(map(rootDirs, rootDirectory => combinePaths(rootDirectory, relativeDirectory)));
-        }
-
-        function getCompletionEntriesForDirectoryFragmentWithRootDirs(rootDirs: string[], fragment: string, scriptPath: string, extensions: string[], includeExtensions: boolean, span: TextSpan, exclude?: string): CompletionEntry[] {
-            const basePath = compilerOptions.project || host.getCurrentDirectory();
-            const ignoreCase = !(host.useCaseSensitiveFileNames && host.useCaseSensitiveFileNames());
-            const baseDirectories = getBaseDirectoriesFromRootDirs(rootDirs, basePath, scriptPath, ignoreCase);
-
-            const result: CompletionEntry[] = [];
-
-            for (const baseDirectory of baseDirectories) {
-                getCompletionEntriesForDirectoryFragment(fragment, baseDirectory, extensions, includeExtensions, span, exclude, result);
-            }
+        return entries;
+    }
 
-            return result;
+    function createCompletionEntry(symbol: Symbol, location: Node, performCharacterChecks: boolean, typeChecker: TypeChecker, target: ScriptTarget): CompletionEntry {
+        // Try to get a valid display name for this symbol, if we could not find one, then ignore it.
+        // We would like to only show things that can be added after a dot, so for instance numeric properties can
+        // not be accessed with a dot (a.1 <- invalid)
+        const displayName = getCompletionEntryDisplayNameForSymbol(typeChecker, symbol, target, performCharacterChecks, location);
+        if (!displayName) {
+            return undefined;
         }
 
-        function getCompletionEntriesForDirectoryFragment(fragment: string, scriptPath: string, extensions: string[], includeExtensions: boolean, span: TextSpan, exclude?: string, result: CompletionEntry[] = []): CompletionEntry[] {
-            fragment = getDirectoryPath(fragment);
-            if (!fragment) {
-                fragment = "./";
-            }
-            else {
-                fragment = ensureTrailingDirectorySeparator(fragment);
-            }
-
-            const absolutePath = normalizeAndPreserveTrailingSlash(isRootedDiskPath(fragment) ? fragment : combinePaths(scriptPath, fragment));
-            const baseDirectory = getDirectoryPath(absolutePath);
-            const ignoreCase = !(host.useCaseSensitiveFileNames && host.useCaseSensitiveFileNames());
-
-            if (tryDirectoryExists(host, baseDirectory)) {
-                // Enumerate the available files if possible
-                const files = tryReadDirectory(host, baseDirectory, extensions, /*exclude*/undefined, /*include*/["./*"]);
-
-                if (files) {
-                    const foundFiles = createMap<boolean>();
-                    for (let filePath of files) {
-                        filePath = normalizePath(filePath);
-                        if (exclude && comparePaths(filePath, exclude, scriptPath, ignoreCase) === Comparison.EqualTo) {
-                            continue;
-                        }
-
-                        const foundFileName = includeExtensions ? getBaseFileName(filePath) : removeFileExtension(getBaseFileName(filePath));
-
-                        if (!foundFiles[foundFileName]) {
-                            foundFiles[foundFileName] = true;
-                        }
-                    }
-
-                    for (const foundFile in foundFiles) {
-                        result.push(createCompletionEntryForModule(foundFile, ScriptElementKind.scriptElement, span));
-                    }
-                }
-
-                // If possible, get folder completion as well
-                const directories = tryGetDirectories(host, baseDirectory);
-
-                if (directories) {
-                    for (const directory of directories) {
-                        const directoryName = getBaseFileName(normalizePath(directory));
+        // TODO(drosen): Right now we just permit *all* semantic meanings when calling
+        // 'getSymbolKind' which is permissible given that it is backwards compatible; but
+        // really we should consider passing the meaning for the node so that we don't report
+        // that a suggestion for a value is an interface.  We COULD also just do what
+        // 'getSymbolModifiers' does, which is to use the first declaration.
+
+        // Use a 'sortText' of 0' so that all symbol completion entries come before any other
+        // entries (like JavaScript identifier entries).
+        return {
+            name: displayName,
+            kind: SymbolDisplay.getSymbolKind(typeChecker, symbol, location),
+            kindModifiers: SymbolDisplay.getSymbolModifiers(symbol),
+            sortText: "0",
+        };
+    }
 
-                        result.push(createCompletionEntryForModule(directoryName, ScriptElementKind.directory, span));
+    function getCompletionEntriesFromSymbols(symbols: Symbol[], entries: Push<CompletionEntry>, location: Node, performCharacterChecks: boolean, typeChecker: TypeChecker, target: ScriptTarget, log: Log): Map<string> {
+        const start = timestamp();
+        const uniqueNames = createMap<string>();
+        if (symbols) {
+            for (const symbol of symbols) {
+                const entry = createCompletionEntry(symbol, location, performCharacterChecks, typeChecker, target);
+                if (entry) {
+                    const id = escapeIdentifier(entry.name);
+                    if (!uniqueNames.get(id)) {
+                        entries.push(entry);
+                        uniqueNames.set(id, id);
                     }
                 }
             }
-
-            return result;
         }
 
-        /**
-         * Check all of the declared modules and those in node modules. Possible sources of modules:
-         *      Modules that are found by the type checker
-         *      Modules found relative to "baseUrl" compliler options (including patterns from "paths" compiler option)
-         *      Modules from node_modules (i.e. those listed in package.json)
-         *          This includes all files that are found in node_modules/moduleName/ with acceptable file extensions
-         */
-        function getCompletionEntriesForNonRelativeModules(fragment: string, scriptPath: string, span: TextSpan): CompletionEntry[] {
-            const { baseUrl, paths } = compilerOptions;
-
-            let result: CompletionEntry[];
-
-            if (baseUrl) {
-                const fileExtensions = getSupportedExtensions(compilerOptions);
-                const projectDir = compilerOptions.project || host.getCurrentDirectory();
-                const absolute = isRootedDiskPath(baseUrl) ? baseUrl : combinePaths(projectDir, baseUrl);
-                result = getCompletionEntriesForDirectoryFragment(fragment, normalizePath(absolute), fileExtensions, /*includeExtensions*/false, span);
-
-                if (paths) {
-                    for (const path in paths) {
-                        if (paths.hasOwnProperty(path)) {
-                            if (path === "*") {
-                                if (paths[path]) {
-                                    for (const pattern of paths[path]) {
-                                        for (const match of getModulesForPathsPattern(fragment, baseUrl, pattern, fileExtensions)) {
-                                            result.push(createCompletionEntryForModule(match, ScriptElementKind.externalModuleName, span));
-                                        }
-                                    }
-                                }
-                            }
-                            else if (startsWith(path, fragment)) {
-                                const entry = paths[path] && paths[path].length === 1 && paths[path][0];
-                                if (entry) {
-                                    result.push(createCompletionEntryForModule(path, ScriptElementKind.externalModuleName, span));
-                                }
-                            }
-                        }
-                    }
-                }
-            }
-            else {
-                result = [];
-            }
-
-            getCompletionEntriesFromTypings(host, compilerOptions, scriptPath, span, result);
-
-            for (const moduleName of enumeratePotentialNonRelativeModules(fragment, scriptPath, compilerOptions)) {
-                result.push(createCompletionEntryForModule(moduleName, ScriptElementKind.externalModuleName, span));
-            }
-
-            return result;
-        }
-
-        function getModulesForPathsPattern(fragment: string, baseUrl: string, pattern: string, fileExtensions: string[]): string[] {
-            if (host.readDirectory) {
-                const parsed = hasZeroOrOneAsteriskCharacter(pattern) ? tryParsePattern(pattern) : undefined;
-                if (parsed) {
-                    // The prefix has two effective parts: the directory path and the base component after the filepath that is not a
-                    // full directory component. For example: directory/path/of/prefix/base*
-                    const normalizedPrefix = normalizeAndPreserveTrailingSlash(parsed.prefix);
-                    const normalizedPrefixDirectory = getDirectoryPath(normalizedPrefix);
-                    const normalizedPrefixBase = getBaseFileName(normalizedPrefix);
-
-                    const fragmentHasPath = fragment.indexOf(directorySeparator) !== -1;
-
-                    // Try and expand the prefix to include any path from the fragment so that we can limit the readDirectory call
-                    const expandedPrefixDirectory = fragmentHasPath ? combinePaths(normalizedPrefixDirectory, normalizedPrefixBase + getDirectoryPath(fragment)) : normalizedPrefixDirectory;
-
-                    const normalizedSuffix = normalizePath(parsed.suffix);
-                    const baseDirectory = combinePaths(baseUrl, expandedPrefixDirectory);
-                    const completePrefix = fragmentHasPath ? baseDirectory : ensureTrailingDirectorySeparator(baseDirectory) + normalizedPrefixBase;
-
-                    // If we have a suffix, then we need to read the directory all the way down. We could create a glob
-                    // that encodes the suffix, but we would have to escape the character "?" which readDirectory
-                    // doesn't support. For now, this is safer but slower
-                    const includeGlob = normalizedSuffix ? "**/*" : "./*";
-
-                    const matches = tryReadDirectory(host, baseDirectory, fileExtensions, undefined, [includeGlob]);
-                    if (matches) {
-                        const result: string[] = [];
-
-                        // Trim away prefix and suffix
-                        for (const match of matches) {
-                            const normalizedMatch = normalizePath(match);
-                            if (!endsWith(normalizedMatch, normalizedSuffix) || !startsWith(normalizedMatch, completePrefix)) {
-                                continue;
-                            }
-
-                            const start = completePrefix.length;
-                            const length = normalizedMatch.length - start - normalizedSuffix.length;
-
-                            result.push(removeFileExtension(normalizedMatch.substr(start, length)));
-                        }
-                        return result;
-                    }
-                }
-            }
+        log("getCompletionsAtPosition: getCompletionEntriesFromSymbols: " + (timestamp() - start));
+        return uniqueNames;
+    }
 
+    function getStringLiteralCompletionEntries(sourceFile: SourceFile, position: number, typeChecker: TypeChecker, compilerOptions: CompilerOptions, host: LanguageServiceHost, log: Log): CompletionInfo | undefined {
+        const node = findPrecedingToken(position, sourceFile);
+        if (!node || node.kind !== SyntaxKind.StringLiteral) {
             return undefined;
         }
 
-        function enumeratePotentialNonRelativeModules(fragment: string, scriptPath: string, options: CompilerOptions): string[] {
-            // Check If this is a nested module
-            const isNestedModule = fragment.indexOf(directorySeparator) !== -1;
-            const moduleNameFragment = isNestedModule ? fragment.substr(0, fragment.lastIndexOf(directorySeparator)) : undefined;
-
-            // Get modules that the type checker picked up
-            const ambientModules = map(typeChecker.getAmbientModules(), sym => stripQuotes(sym.name));
-            let nonRelativeModules = filter(ambientModules, moduleName => startsWith(moduleName, fragment));
-
-            // Nested modules of the form "module-name/sub" need to be adjusted to only return the string
-            // after the last '/' that appears in the fragment because that's where the replacement span
-            // starts
-            if (isNestedModule) {
-                const moduleNameWithSeperator = ensureTrailingDirectorySeparator(moduleNameFragment);
-                nonRelativeModules = map(nonRelativeModules, moduleName => {
-                    if (startsWith(fragment, moduleNameWithSeperator)) {
-                        return moduleName.substr(moduleNameWithSeperator.length);
-                    }
-                    return moduleName;
-                });
-            }
-
-
-            if (!options.moduleResolution || options.moduleResolution === ModuleResolutionKind.NodeJs) {
-                for (const visibleModule of enumerateNodeModulesVisibleToScript(host, scriptPath)) {
-                    if (!isNestedModule) {
-                        nonRelativeModules.push(visibleModule.moduleName);
-                    }
-                    else if (startsWith(visibleModule.moduleName, moduleNameFragment)) {
-                        const nestedFiles = tryReadDirectory(host, visibleModule.moduleDir, supportedTypeScriptExtensions, /*exclude*/undefined, /*include*/["./*"]);
-                        if (nestedFiles) {
-                            for (let f of nestedFiles) {
-                                f = normalizePath(f);
-                                const nestedModule = removeFileExtension(getBaseFileName(f));
-                                nonRelativeModules.push(nestedModule);
-                            }
-                        }
-                    }
-                }
-            }
-
-            return deduplicate(nonRelativeModules);
+        if (node.parent.kind === SyntaxKind.PropertyAssignment &&
+            node.parent.parent.kind === SyntaxKind.ObjectLiteralExpression &&
+            (<PropertyAssignment>node.parent).name === node) {
+            // Get quoted name of properties of the object literal expression
+            // i.e. interface ConfigFiles {
+            //          'jspm:dev': string
+            //      }
+            //      let files: ConfigFiles = {
+            //          '/*completion position*/'
+            //      }
+            //
+            //      function foo(c: ConfigFiles) {}
+            //      foo({
+            //          '/*completion position*/'
+            //      });
+            return getStringLiteralCompletionEntriesFromPropertyAssignment(<ObjectLiteralElement>node.parent, typeChecker, compilerOptions.target, log);
+        }
+        else if (isElementAccessExpression(node.parent) && node.parent.argumentExpression === node) {
+            // Get all names of properties on the expression
+            // i.e. interface A {
+            //      'prop1': string
+            // }
+            // let a: A;
+            // a['/*completion position*/']
+            return getStringLiteralCompletionEntriesFromElementAccess(node.parent, typeChecker, compilerOptions.target, log);
+        }
+        else if (node.parent.kind === SyntaxKind.ImportDeclaration || isExpressionOfExternalModuleImportEqualsDeclaration(node) || isRequireCall(node.parent, /*checkArgumentIsStringLiteral*/ false)) {
+            // Get all known external module names or complete a path to a module
+            // i.e. import * as ns from "/*completion position*/";
+            //      import x = require("/*completion position*/");
+            //      var y = require("/*completion position*/");
+            return PathCompletions.getStringLiteralCompletionEntriesFromModuleNames(<StringLiteral>node, compilerOptions, host, typeChecker);
+        }
+        else if (isEqualityExpression(node.parent)) {
+            // Get completions from the type of the other operand
+            // i.e. switch (a) {
+            //         case '/*completion position*/'
+            //      }
+            return getStringLiteralCompletionEntriesFromType(typeChecker.getTypeAtLocation(node.parent.left === node ? node.parent.right : node.parent.left), typeChecker);
+        }
+        else if (isCaseOrDefaultClause(node.parent)) {
+            // Get completions from the type of the switch expression
+            // i.e. x === '/*completion position'
+            return getStringLiteralCompletionEntriesFromType(typeChecker.getTypeAtLocation((<SwitchStatement>node.parent.parent.parent).expression), typeChecker);
         }
-
-        function getTripleSlashReferenceCompletion(sourceFile: SourceFile, position: number): CompletionInfo {
-            const token = getTokenAtPosition(sourceFile, position);
-            if (!token) {
-                return undefined;
-            }
-            const commentRanges: CommentRange[] = getLeadingCommentRanges(sourceFile.text, token.pos);
-
-            if (!commentRanges || !commentRanges.length) {
-                return undefined;
-            }
-
-            const range = forEach(commentRanges, commentRange => position >= commentRange.pos && position <= commentRange.end && commentRange);
-
-            if (!range) {
-                return undefined;
-            }
-
-            const text = sourceFile.text.substr(range.pos, position - range.pos);
-
-            const match = tripleSlashDirectiveFragmentRegex.exec(text);
-            if (match) {
-                const prefix = match[1];
-                const kind = match[2];
-                const toComplete = match[3];
-
-                const scriptPath = getDirectoryPath(sourceFile.path);
-                let entries: CompletionEntry[];
-                if (kind === "path") {
-                    // Give completions for a relative path
-                    const span: TextSpan = getDirectoryFragmentTextSpan(toComplete, range.pos + prefix.length);
-                    entries = getCompletionEntriesForDirectoryFragment(toComplete, scriptPath, getSupportedExtensions(compilerOptions), /*includeExtensions*/true, span, sourceFile.path);
-                }
-                else {
-                    // Give completions based on the typings available
-                    const span: TextSpan = { start: range.pos + prefix.length, length: match[0].length - prefix.length };
-                    entries = getCompletionEntriesFromTypings(host, compilerOptions, scriptPath, span);
-                }
-
-                return {
-                    isMemberCompletion: false,
-                    isNewIdentifierLocation: true,
-                    entries
-                };
+        else {
+            const argumentInfo = SignatureHelp.getImmediatelyContainingArgumentInfo(node, position, sourceFile);
+            if (argumentInfo) {
+                // Get string literal completions from specialized signatures of the target
+                // i.e. declare function f(a: 'A');
+                // f("/*completion position*/")
+                return getStringLiteralCompletionEntriesFromCallExpression(argumentInfo, typeChecker);
             }
 
-            return undefined;
+            // Get completion for string literal from string literal type
+            // i.e. var x: "hi" | "hello" = "/*completion position*/"
+            return getStringLiteralCompletionEntriesFromType(typeChecker.getContextualType(<StringLiteral>node), typeChecker);
         }
+    }
 
-        function getCompletionEntriesFromTypings(host: LanguageServiceHost, options: CompilerOptions, scriptPath: string, span: TextSpan, result: CompletionEntry[] = []): CompletionEntry[] {
-            // Check for typings specified in compiler options
-            if (options.types) {
-                for (const moduleName of options.types) {
-                    result.push(createCompletionEntryForModule(moduleName, ScriptElementKind.externalModuleName, span));
-                }
+    function getStringLiteralCompletionEntriesFromPropertyAssignment(element: ObjectLiteralElement, typeChecker: TypeChecker, target: ScriptTarget, log: Log): CompletionInfo | undefined {
+        const type = typeChecker.getContextualType((<ObjectLiteralExpression>element.parent));
+        const entries: CompletionEntry[] = [];
+        if (type) {
+            getCompletionEntriesFromSymbols(type.getApparentProperties(), entries, element, /*performCharacterChecks*/ false, typeChecker, target, log);
+            if (entries.length) {
+                return { isGlobalCompletion: false, isMemberCompletion: true, isNewIdentifierLocation: true, entries };
             }
-            else if (host.getDirectories) {
-                let typeRoots: string[];
-                try {
-                    // Wrap in try catch because getEffectiveTypeRoots touches the filesystem
-                    typeRoots = getEffectiveTypeRoots(options, host);
-                }
-                catch (e) {}
+        }
+    }
 
-                if (typeRoots) {
-                    for (const root of typeRoots) {
-                        getCompletionEntriesFromDirectories(host, options, root, span, result);
-                    }
-                }
-            }
+    function getStringLiteralCompletionEntriesFromCallExpression(argumentInfo: SignatureHelp.ArgumentListInfo, typeChecker: TypeChecker): CompletionInfo | undefined {
+        const candidates: Signature[] = [];
+        const entries: CompletionEntry[] = [];
+        const uniques = createMap<true>();
 
-            if (host.getDirectories) {
-                // Also get all @types typings installed in visible node_modules directories
-                for (const packageJson of findPackageJsons(scriptPath)) {
-                    const typesDir = combinePaths(getDirectoryPath(packageJson), "node_modules/@types");
-                    getCompletionEntriesFromDirectories(host, options, typesDir, span, result);
-                }
-            }
+        typeChecker.getResolvedSignature(argumentInfo.invocation, candidates);
 
-            return result;
+        for (const candidate of candidates) {
+            addStringLiteralCompletionsFromType(typeChecker.getParameterType(candidate, argumentInfo.argumentIndex), entries, typeChecker, uniques);
         }
 
-        function getCompletionEntriesFromDirectories(host: LanguageServiceHost, options: CompilerOptions, directory: string, span: TextSpan, result: CompletionEntry[]) {
-            if (host.getDirectories && tryDirectoryExists(host, directory)) {
-                const directories = tryGetDirectories(host, directory);
-                if (directories) {
-                    for (let typeDirectory of directories) {
-                        typeDirectory = normalizePath(typeDirectory);
-                        result.push(createCompletionEntryForModule(getBaseFileName(typeDirectory), ScriptElementKind.externalModuleName, span));
-                    }
-                }
-            }
+        if (entries.length) {
+            return { isGlobalCompletion: false, isMemberCompletion: false, isNewIdentifierLocation: true, entries };
         }
 
-        function findPackageJsons(currentDir: string): string[] {
-            const paths: string[] = [];
-            let currentConfigPath: string;
-            while (true) {
-                currentConfigPath = findConfigFile(currentDir, (f) => tryFileExists(host, f), "package.json");
-                if (currentConfigPath) {
-                    paths.push(currentConfigPath);
+        return undefined;
+    }
 
-                    currentDir = getDirectoryPath(currentConfigPath);
-                    const parent = getDirectoryPath(currentDir);
-                    if (currentDir === parent) {
-                        break;
-                    }
-                    currentDir = parent;
-                }
-                else {
-                    break;
-                }
+    function getStringLiteralCompletionEntriesFromElementAccess(node: ElementAccessExpression, typeChecker: TypeChecker, target: ScriptTarget, log: Log): CompletionInfo | undefined {
+        const type = typeChecker.getTypeAtLocation(node.expression);
+        const entries: CompletionEntry[] = [];
+        if (type) {
+            getCompletionEntriesFromSymbols(type.getApparentProperties(), entries, node, /*performCharacterChecks*/ false, typeChecker, target, log);
+            if (entries.length) {
+                return { isGlobalCompletion: false, isMemberCompletion: true, isNewIdentifierLocation: true, entries };
             }
-
-            return paths;
         }
+        return undefined;
+    }
 
-
-        function enumerateNodeModulesVisibleToScript(host: LanguageServiceHost, scriptPath: string) {
-            const result: VisibleModuleInfo[] = [];
-
-            if (host.readFile && host.fileExists) {
-                for (const packageJson of findPackageJsons(scriptPath)) {
-                    const contents = tryReadingPackageJson(packageJson);
-                    if (!contents) {
-                        return;
-                    }
-
-                    const nodeModulesDir = combinePaths(getDirectoryPath(packageJson), "node_modules");
-                    const foundModuleNames: string[] = [];
-
-                    // Provide completions for all non @types dependencies
-                    for (const key of nodeModulesDependencyKeys) {
-                        addPotentialPackageNames(contents[key], foundModuleNames);
-                    }
-
-                    for (const moduleName of foundModuleNames) {
-                        const moduleDir = combinePaths(nodeModulesDir, moduleName);
-                        result.push({
-                            moduleName,
-                            moduleDir
-                        });
-                    }
-                }
-            }
-
-            return result;
-
-            function tryReadingPackageJson(filePath: string) {
-                try {
-                    const fileText = tryReadFile(host, filePath);
-                    return fileText ? JSON.parse(fileText) : undefined;
-                }
-                catch (e) {
-                    return undefined;
-                }
-            }
-
-            function addPotentialPackageNames(dependencies: any, result: string[]) {
-                if (dependencies) {
-                    for (const dep in dependencies) {
-                        if (dependencies.hasOwnProperty(dep) && !startsWith(dep, "@types/")) {
-                            result.push(dep);
-                        }
-                    }
-                }
+    function getStringLiteralCompletionEntriesFromType(type: Type, typeChecker: TypeChecker): CompletionInfo | undefined {
+        if (type) {
+            const entries: CompletionEntry[] = [];
+            addStringLiteralCompletionsFromType(type, entries, typeChecker);
+            if (entries.length) {
+                return { isGlobalCompletion: false, isMemberCompletion: false, isNewIdentifierLocation: false, entries };
             }
         }
+        return undefined;
+    }
 
-        function createCompletionEntryForModule(name: string, kind: string, replacementSpan: TextSpan): CompletionEntry {
-            return { name, kind, kindModifiers: ScriptElementKindModifier.none, sortText: name, replacementSpan };
+    function addStringLiteralCompletionsFromType(type: Type, result: Push<CompletionEntry>, typeChecker: TypeChecker, uniques = createMap<true>()): void {
+        if (type && type.flags & TypeFlags.TypeParameter) {
+            type = typeChecker.getBaseConstraintOfType(type);
         }
-
-        // Replace everything after the last directory seperator that appears
-        function getDirectoryFragmentTextSpan(text: string, textStart: number): TextSpan {
-            const index = text.lastIndexOf(directorySeparator);
-            const offset = index !== -1 ? index + 1 : 0;
-            return { start: textStart + offset, length: text.length - offset };
+        if (!type) {
+            return;
         }
-
-        // Returns true if the path is explicitly relative to the script (i.e. relative to . or ..)
-        function isPathRelativeToScript(path: string) {
-            if (path && path.length >= 2 && path.charCodeAt(0) === CharacterCodes.dot) {
-                const slashIndex = path.length >= 3 && path.charCodeAt(1) === CharacterCodes.dot ? 2 : 1;
-                const slashCharCode = path.charCodeAt(slashIndex);
-                return slashCharCode === CharacterCodes.slash || slashCharCode === CharacterCodes.backslash;
+        if (type.flags & TypeFlags.Union) {
+            for (const t of (<UnionType>type).types) {
+                addStringLiteralCompletionsFromType(t, result, typeChecker, uniques);
             }
-            return false;
         }
-
-        function normalizeAndPreserveTrailingSlash(path: string) {
-            return hasTrailingDirectorySeparator(path) ? ensureTrailingDirectorySeparator(normalizePath(path)) : normalizePath(path);
+        else if (type.flags & TypeFlags.StringLiteral) {
+            const name = (<StringLiteralType>type).value;
+            if (!uniques.has(name)) {
+                uniques.set(name, true);
+                result.push({
+                    name,
+                    kindModifiers: ScriptElementKindModifier.none,
+                    kind: ScriptElementKind.variableElement,
+                    sortText: "0"
+                });
+            }
         }
     }
 
@@ -726,26 +309,31 @@ namespace ts.Completions {
             const symbol = forEach(symbols, s => getCompletionEntryDisplayNameForSymbol(typeChecker, s, compilerOptions.target, /*performCharacterChecks*/ false, location) === entryName ? s : undefined);
 
             if (symbol) {
-                const { displayParts, documentation, symbolKind } = SymbolDisplay.getSymbolDisplayPartsDocumentationAndSymbolKind(typeChecker, symbol, sourceFile, location, location, SemanticMeaning.All);
+                const { displayParts, documentation, symbolKind, tags } = SymbolDisplay.getSymbolDisplayPartsDocumentationAndSymbolKind(typeChecker, symbol, sourceFile, location, location, SemanticMeaning.All);
                 return {
                     name: entryName,
                     kindModifiers: SymbolDisplay.getSymbolModifiers(symbol),
                     kind: symbolKind,
                     displayParts,
-                    documentation
+                    documentation,
+                    tags
                 };
             }
         }
 
         // Didn't find a symbol with this name.  See if we can find a keyword instead.
-        const keywordCompletion = forEach(keywordCompletions, c => c.name === entryName);
+        const keywordCompletion = forEach(
+            getKeywordCompletions(KeywordCompletionFilters.None),
+            c => c.name === entryName
+        );
         if (keywordCompletion) {
             return {
                 name: entryName,
                 kind: ScriptElementKind.keyword,
                 kindModifiers: ScriptElementKindModifier.none,
                 displayParts: [displayPart(entryName, SymbolDisplayPartKind.keyword)],
-                documentation: undefined
+                documentation: undefined,
+                tags: undefined
             };
         }
 
@@ -768,54 +356,94 @@ namespace ts.Completions {
         return undefined;
     }
 
-    function getCompletionData(typeChecker: TypeChecker, log: (message: string) => void, sourceFile: SourceFile, position: number) {
+    interface CompletionData {
+        symbols: Symbol[];
+        isGlobalCompletion: boolean;
+        isMemberCompletion: boolean;
+        isNewIdentifierLocation: boolean;
+        location: Node;
+        isRightOfDot: boolean;
+        request?: Request;
+        keywordFilters: KeywordCompletionFilters;
+    }
+    type Request = { kind: "JsDocTagName" } | { kind: "JsDocTag" } | { kind: "JsDocParameterName", tag: JSDocParameterTag };
+
+    function getCompletionData(typeChecker: TypeChecker, log: (message: string) => void, sourceFile: SourceFile, position: number): CompletionData {
         const isJavaScriptFile = isSourceFileJavaScript(sourceFile);
 
-        let isJsDocTagName = false;
+        let request: Request | undefined;
 
         let start = timestamp();
-        const currentToken = getTokenAtPosition(sourceFile, position);
+        let currentToken = getTokenAtPosition(sourceFile, position, /*includeJsDocComment*/ false); // TODO: GH#15853
+        // We will check for jsdoc comments with insideComment and getJsDocTagAtPosition. (TODO: that seems rather inefficient to check the same thing so many times.)
+
         log("getCompletionData: Get current token: " + (timestamp() - start));
 
         start = timestamp();
         // Completion not allowed inside comments, bail out if this is the case
-        const insideComment = isInsideComment(sourceFile, currentToken, position);
+        const insideComment = isInComment(sourceFile, position, currentToken);
         log("getCompletionData: Is inside comment: " + (timestamp() - start));
 
+        let insideJsDocTagTypeExpression = false;
         if (insideComment) {
-            // The current position is next to the '@' sign, when no tag name being provided yet.
-            // Provide a full list of tag names
-            if (hasDocComment(sourceFile, position) && sourceFile.text.charCodeAt(position - 1) === CharacterCodes.at) {
-                isJsDocTagName = true;
+            if (hasDocComment(sourceFile, position)) {
+                if (sourceFile.text.charCodeAt(position - 1) === CharacterCodes.at) {
+                    // The current position is next to the '@' sign, when no tag name being provided yet.
+                    // Provide a full list of tag names
+                    request = { kind: "JsDocTagName" };
+                }
+                else {
+                    // When completion is requested without "@", we will have check to make sure that
+                    // there are no comments prefix the request position. We will only allow "*" and space.
+                    // e.g
+                    //   /** |c| /*
+                    //
+                    //   /**
+                    //     |c|
+                    //    */
+                    //
+                    //   /**
+                    //    * |c|
+                    //    */
+                    //
+                    //   /**
+                    //    *         |c|
+                    //    */
+                    const lineStart = getLineStartPositionForPosition(position, sourceFile);
+                    if (!(sourceFile.text.substring(lineStart, position).match(/[^\*|\s|(/\*\*)]/))) {
+                        request = { kind: "JsDocTag" };
+                    }
+                }
             }
 
             // Completion should work inside certain JsDoc tags. For example:
             //     /** @type {number | string} */
             // Completion should work in the brackets
-            let insideJsDocTagExpression = false;
-            const tag = getJsDocTagAtPosition(sourceFile, position);
+            const tag = getJsDocTagAtPosition(currentToken, position);
             if (tag) {
                 if (tag.tagName.pos <= position && position <= tag.tagName.end) {
-                    isJsDocTagName = true;
+                    request = { kind: "JsDocTagName" };
                 }
-
-                switch (tag.kind) {
-                    case SyntaxKind.JSDocTypeTag:
-                    case SyntaxKind.JSDocParameterTag:
-                    case SyntaxKind.JSDocReturnTag:
-                        const tagWithExpression = <JSDocTypeTag | JSDocParameterTag | JSDocReturnTag>tag;
-                        if (tagWithExpression.typeExpression) {
-                            insideJsDocTagExpression = tagWithExpression.typeExpression.pos < position && position < tagWithExpression.typeExpression.end;
-                        }
-                        break;
+                if (isTagWithTypeExpression(tag) && tag.typeExpression) {
+                    currentToken = getTokenAtPosition(sourceFile, position, /*includeJsDocComment*/ true);
+                    if (!currentToken ||
+                        (!isDeclarationName(currentToken) &&
+                            (currentToken.parent.kind !== SyntaxKind.JSDocPropertyTag ||
+                                (<JSDocPropertyTag>currentToken.parent).name !== currentToken))) {
+                        // Use as type location if inside tag's type expression
+                        insideJsDocTagTypeExpression = isCurrentlyEditingNode(tag.typeExpression);
+                    }
+                }
+                if (isJSDocParameterTag(tag) && (nodeIsMissing(tag.name) || tag.name.pos <= position && position <= tag.name.end)) {
+                    request = { kind: "JsDocParameterName", tag };
                 }
             }
 
-            if (isJsDocTagName) {
-                return { symbols: undefined, isMemberCompletion: false, isNewIdentifierLocation: false, location: undefined, isRightOfDot: false, isJsDocTagName };
+            if (request) {
+                return { symbols: undefined, isGlobalCompletion: false, isMemberCompletion: false, isNewIdentifierLocation: false, location: undefined, isRightOfDot: false, request, keywordFilters: KeywordCompletionFilters.None };
             }
 
-            if (!insideJsDocTagExpression) {
+            if (!insideJsDocTagTypeExpression) {
                 // Proceed if the current position is in jsDoc tag expression; otherwise it is a normal
                 // comment or the plain text part of a jsDoc comment, so no completion should be available
                 log("Returning an empty list because completion was inside a regular comment or plain text part of a JsDoc comment.");
@@ -824,7 +452,7 @@ namespace ts.Completions {
         }
 
         start = timestamp();
-        const previousToken = findPrecedingToken(position, sourceFile);
+        const previousToken = findPrecedingToken(position, sourceFile, /*startNode*/ undefined, insideJsDocTagTypeExpression);
         log("getCompletionData: Get previous token 1: " + (timestamp() - start));
 
         // The decision to provide completion depends on the contextToken, which is determined through the previousToken.
@@ -835,7 +463,7 @@ namespace ts.Completions {
         // Skip this partial identifier and adjust the contextToken to the token that precedes it.
         if (contextToken && position <= contextToken.end && isWord(contextToken.kind)) {
             const start = timestamp();
-            contextToken = findPrecedingToken(contextToken.getFullStart(), sourceFile);
+            contextToken = findPrecedingToken(contextToken.getFullStart(), sourceFile, /*startNode*/ undefined, insideJsDocTagTypeExpression);
             log("getCompletionData: Get previous token 2: " + (timestamp() - start));
         }
 
@@ -847,7 +475,7 @@ namespace ts.Completions {
         let isRightOfOpenTag = false;
         let isStartingCloseTag = false;
 
-        let location = getTouchingPropertyName(sourceFile, position);
+        let location = getTouchingPropertyName(sourceFile, position, insideJsDocTagTypeExpression); // TODO: GH#15853
         if (contextToken) {
             // Bail out if this is a known invalid completion location
             if (isCompletionListBlocker(contextToken)) {
@@ -855,8 +483,8 @@ namespace ts.Completions {
                 return undefined;
             }
 
-            const { parent, kind } = contextToken;
-            if (kind === SyntaxKind.DotToken) {
+            let parent = contextToken.parent;
+            if (contextToken.kind === SyntaxKind.DotToken) {
                 if (parent.kind === SyntaxKind.PropertyAccessExpression) {
                     node = (<PropertyAccessExpression>contextToken.parent).expression;
                     isRightOfDot = true;
@@ -872,20 +500,46 @@ namespace ts.Completions {
                 }
             }
             else if (sourceFile.languageVariant === LanguageVariant.JSX) {
-                if (kind === SyntaxKind.LessThanToken) {
-                    isRightOfOpenTag = true;
-                    location = contextToken;
+                // <UI.Test /* completion position */ />
+                // If the tagname is a property access expression, we will then walk up to the top most of property access expression.
+                // Then, try to get a JSX container and its associated attributes type.
+                if (parent && parent.kind === SyntaxKind.PropertyAccessExpression) {
+                    contextToken = parent;
+                    parent = parent.parent;
                 }
-                else if (kind === SyntaxKind.SlashToken && contextToken.parent.kind === SyntaxKind.JsxClosingElement) {
-                    isStartingCloseTag = true;
-                    location = contextToken;
+
+                switch (parent.kind) {
+                    case SyntaxKind.JsxClosingElement:
+                        if (contextToken.kind === SyntaxKind.SlashToken) {
+                            isStartingCloseTag = true;
+                            location = contextToken;
+                        }
+                        break;
+
+                    case SyntaxKind.BinaryExpression:
+                        if (!((parent as BinaryExpression).left.flags & NodeFlags.ThisNodeHasError)) {
+                            // It has a left-hand side, so we're not in an opening JSX tag.
+                            break;
+                        }
+                    // falls through
+
+                    case SyntaxKind.JsxSelfClosingElement:
+                    case SyntaxKind.JsxElement:
+                    case SyntaxKind.JsxOpeningElement:
+                        if (contextToken.kind === SyntaxKind.LessThanToken) {
+                            isRightOfOpenTag = true;
+                            location = contextToken;
+                        }
+                        break;
                 }
             }
         }
 
         const semanticStart = timestamp();
+        let isGlobalCompletion = false;
         let isMemberCompletion: boolean;
         let isNewIdentifierLocation: boolean;
+        let keywordFilters = KeywordCompletionFilters.None;
         let symbols: Symbol[] = [];
 
         if (isRightOfDot) {
@@ -923,13 +577,31 @@ namespace ts.Completions {
 
         log("getCompletionData: Semantic work: " + (timestamp() - semanticStart));
 
-        return { symbols, isMemberCompletion, isNewIdentifierLocation, location, isRightOfDot: (isRightOfDot || isRightOfOpenTag), isJsDocTagName };
+        return { symbols, isGlobalCompletion, isMemberCompletion, isNewIdentifierLocation, location, isRightOfDot: (isRightOfDot || isRightOfOpenTag), request, keywordFilters };
+
+        type JSDocTagWithTypeExpression = JSDocAugmentsTag | JSDocParameterTag | JSDocPropertyTag | JSDocReturnTag | JSDocTypeTag | JSDocTypedefTag;
+
+        function isTagWithTypeExpression(tag: JSDocTag): tag is JSDocTagWithTypeExpression {
+            switch (tag.kind) {
+                case SyntaxKind.JSDocAugmentsTag:
+                case SyntaxKind.JSDocParameterTag:
+                case SyntaxKind.JSDocPropertyTag:
+                case SyntaxKind.JSDocReturnTag:
+                case SyntaxKind.JSDocTypeTag:
+                case SyntaxKind.JSDocTypedefTag:
+                    return true;
+            }
+        }
 
         function getTypeScriptMemberSymbols(): void {
             // Right of dot member completion list
+            isGlobalCompletion = false;
             isMemberCompletion = true;
             isNewIdentifierLocation = false;
 
+            // Since this is qualified name check its a type node location
+            const isTypeLocation = isPartOfTypeNode(node.parent) || insideJsDocTagTypeExpression;
+            const isRhsOfImportDeclaration = isInRightSideOfInternalImportEqualsDeclaration(node);
             if (node.kind === SyntaxKind.Identifier || node.kind === SyntaxKind.QualifiedName || node.kind === SyntaxKind.PropertyAccessExpression) {
                 let symbol = typeChecker.getSymbolAtLocation(node);
 
@@ -941,16 +613,24 @@ namespace ts.Completions {
                 if (symbol && symbol.flags & SymbolFlags.HasExports) {
                     // Extract module or enum members
                     const exportedSymbols = typeChecker.getExportsOfModule(symbol);
+                    const isValidValueAccess = (symbol: Symbol) => typeChecker.isValidPropertyAccess(<PropertyAccessExpression>(node.parent), symbol.name);
+                    const isValidTypeAccess = (symbol: Symbol) => symbolCanbeReferencedAtTypeLocation(symbol);
+                    const isValidAccess = isRhsOfImportDeclaration ?
+                        // Any kind is allowed when dotting off namespace in internal import equals declaration
+                        (symbol: Symbol) => isValidTypeAccess(symbol) || isValidValueAccess(symbol) :
+                        isTypeLocation ? isValidTypeAccess : isValidValueAccess;
                     forEach(exportedSymbols, symbol => {
-                        if (typeChecker.isValidPropertyAccess(<PropertyAccessExpression>(node.parent), symbol.name)) {
+                        if (isValidAccess(symbol)) {
                             symbols.push(symbol);
                         }
                     });
                 }
             }
 
-            const type = typeChecker.getTypeAtLocation(node);
-            addTypeProperties(type);
+            if (!isTypeLocation) {
+                const type = typeChecker.getTypeAtLocation(node);
+                addTypeProperties(type);
+            }
         }
 
         function addTypeProperties(type: Type) {
@@ -979,6 +659,7 @@ namespace ts.Completions {
         function tryGetGlobalSymbols(): boolean {
             let objectLikeContainer: ObjectLiteralExpression | BindingPattern;
             let namedImportsOrExports: NamedImportsOrExports;
+            let classLikeContainer: ClassLikeDeclaration;
             let jsxContainer: JsxOpeningLikeElement;
 
             if (objectLikeContainer = tryGetObjectLikeCompletionContainer(contextToken)) {
@@ -991,19 +672,34 @@ namespace ts.Completions {
                 return tryGetImportOrExportClauseCompletionSymbols(namedImportsOrExports);
             }
 
+            if (tryGetConstructorLikeCompletionContainer(contextToken)) {
+                // no members, only keywords
+                isMemberCompletion = false;
+                // Declaring new property/method/accessor
+                isNewIdentifierLocation = true;
+                // Has keywords for constructor parameter
+                keywordFilters = KeywordCompletionFilters.ConstructorParameterKeywords;
+                return true;
+            }
+
+            if (classLikeContainer = tryGetClassLikeCompletionContainer(contextToken)) {
+                // cursor inside class declaration
+                getGetClassLikeCompletionSymbols(classLikeContainer);
+                return true;
+            }
+
             if (jsxContainer = tryGetContainingJsxElement(contextToken)) {
                 let attrsType: Type;
                 if ((jsxContainer.kind === SyntaxKind.JsxSelfClosingElement) || (jsxContainer.kind === SyntaxKind.JsxOpeningElement)) {
                     // Cursor is inside a JSX self-closing element or opening element
-                    attrsType = typeChecker.getJsxElementAttributesType(<JsxOpeningLikeElement>jsxContainer);
+                    attrsType = typeChecker.getAllAttributesTypeFromJsxOpeningLikeElement(<JsxOpeningLikeElement>jsxContainer);
 
                     if (attrsType) {
-                        symbols = filterJsxAttributes(typeChecker.getPropertiesOfType(attrsType), (<JsxOpeningLikeElement>jsxContainer).attributes);
+                        symbols = filterJsxAttributes(typeChecker.getPropertiesOfType(attrsType), (<JsxOpeningLikeElement>jsxContainer).attributes.properties);
                         isMemberCompletion = true;
                         isNewIdentifierLocation = false;
                         return true;
                     }
-
                 }
             }
 
@@ -1044,14 +740,95 @@ namespace ts.Completions {
                 position;
 
             const scopeNode = getScopeNode(contextToken, adjustedPosition, sourceFile) || sourceFile;
+            if (scopeNode) {
+                isGlobalCompletion =
+                    scopeNode.kind === SyntaxKind.SourceFile ||
+                    scopeNode.kind === SyntaxKind.TemplateExpression ||
+                    scopeNode.kind === SyntaxKind.JsxExpression ||
+                    isStatement(scopeNode);
+            }
 
-            /// TODO filter meaning based on the current context
             const symbolMeanings = SymbolFlags.Type | SymbolFlags.Value | SymbolFlags.Namespace | SymbolFlags.Alias;
-            symbols = typeChecker.getSymbolsInScope(scopeNode, symbolMeanings);
+            symbols = filterGlobalCompletion(typeChecker.getSymbolsInScope(scopeNode, symbolMeanings));
 
             return true;
         }
 
+        function filterGlobalCompletion(symbols: Symbol[]) {
+            return filter(symbols, symbol => {
+                if (!isSourceFile(location)) {
+                    // export = /**/ here we want to get all meanings, so any symbol is ok
+                    if (isExportAssignment(location.parent)) {
+                        return true;
+                    }
+
+                    // This is an alias, follow what it aliases
+                    if (symbol && symbol.flags & SymbolFlags.Alias) {
+                        symbol = typeChecker.getAliasedSymbol(symbol);
+                    }
+
+                    // import m = /**/ <-- It can only access namespace (if typing import = x. this would get member symbols and not namespace)
+                    if (isInRightSideOfInternalImportEqualsDeclaration(location)) {
+                        return !!(symbol.flags & SymbolFlags.Namespace);
+                    }
+
+                    if (insideJsDocTagTypeExpression ||
+                        (!isContextTokenValueLocation(contextToken) &&
+                            (isPartOfTypeNode(location) || isContextTokenTypeLocation(contextToken)))) {
+                        // Its a type, but you can reach it by namespace.type as well
+                        return symbolCanbeReferencedAtTypeLocation(symbol);
+                    }
+                }
+
+                // expressions are value space (which includes the value namespaces)
+                return !!(symbol.flags & SymbolFlags.Value);
+            });
+        }
+
+        function isContextTokenValueLocation(contextToken: Node) {
+            return contextToken &&
+                contextToken.kind === SyntaxKind.TypeOfKeyword &&
+                contextToken.parent.kind === SyntaxKind.TypeQuery;
+        }
+
+        function isContextTokenTypeLocation(contextToken: Node) {
+            if (contextToken) {
+                const parentKind = contextToken.parent.kind;
+                switch (contextToken.kind) {
+                    case SyntaxKind.ColonToken:
+                        return parentKind === SyntaxKind.PropertyDeclaration ||
+                            parentKind === SyntaxKind.PropertySignature ||
+                            parentKind === SyntaxKind.Parameter ||
+                            parentKind === SyntaxKind.VariableDeclaration ||
+                            isFunctionLikeKind(parentKind);
+
+                    case SyntaxKind.EqualsToken:
+                        return parentKind === SyntaxKind.TypeAliasDeclaration;
+
+                    case SyntaxKind.AsKeyword:
+                        return parentKind === SyntaxKind.AsExpression;
+                }
+            }
+        }
+
+        function symbolCanbeReferencedAtTypeLocation(symbol: Symbol): boolean {
+            // This is an alias, follow what it aliases
+            if (symbol && symbol.flags & SymbolFlags.Alias) {
+                symbol = typeChecker.getAliasedSymbol(symbol);
+            }
+
+            if (symbol.flags & SymbolFlags.Type) {
+                return true;
+            }
+
+            if (symbol.flags & (SymbolFlags.ValueModule | SymbolFlags.NamespaceModule)) {
+                const exportedSymbols = typeChecker.getExportsOfModule(symbol);
+                // If the exported symbols contains type,
+                // symbol can be referenced at locations where type is allowed
+                return forEach(exportedSymbols, symbolCanbeReferencedAtTypeLocation);
+            }
+        }
+
         /**
          * Finds the first node that "embraces" the position, so that one may
          * accurately aggregate locals from the closest containing scope.
@@ -1183,63 +960,53 @@ namespace ts.Completions {
          *
          * @returns true if 'symbols' was successfully populated; false otherwise.
          */
-        function tryGetObjectLikeCompletionSymbols(objectLikeContainer: ObjectLiteralExpression | BindingPattern): boolean {
+        function tryGetObjectLikeCompletionSymbols(objectLikeContainer: ObjectLiteralExpression | ObjectBindingPattern): boolean {
             // We're looking up possible property names from contextual/inferred/declared type.
             isMemberCompletion = true;
 
-            let typeForObject: Type;
+            let typeMembers: Symbol[];
             let existingMembers: Declaration[];
 
             if (objectLikeContainer.kind === SyntaxKind.ObjectLiteralExpression) {
                 // We are completing on contextual types, but may also include properties
                 // other than those within the declared type.
                 isNewIdentifierLocation = true;
-
-                // If the object literal is being assigned to something of type 'null | { hello: string }',
-                // it clearly isn't trying to satisfy the 'null' type. So we grab the non-nullable type if possible.
-                typeForObject = typeChecker.getContextualType(<ObjectLiteralExpression>objectLikeContainer);
-                typeForObject = typeForObject && typeForObject.getNonNullableType();
-
+                const typeForObject = typeChecker.getContextualType(<ObjectLiteralExpression>objectLikeContainer);
+                if (!typeForObject) return false;
+                typeMembers = typeChecker.getAllPossiblePropertiesOfType(typeForObject);
                 existingMembers = (<ObjectLiteralExpression>objectLikeContainer).properties;
             }
-            else if (objectLikeContainer.kind === SyntaxKind.ObjectBindingPattern) {
+            else {
+                Debug.assert(objectLikeContainer.kind === SyntaxKind.ObjectBindingPattern);
                 // We are *only* completing on properties from the type being destructured.
                 isNewIdentifierLocation = false;
 
                 const rootDeclaration = getRootDeclaration(objectLikeContainer.parent);
-                if (isVariableLike(rootDeclaration)) {
-                    // We don't want to complete using the type acquired by the shape
-                    // of the binding pattern; we are only interested in types acquired
-                    // through type declaration or inference.
-                    // Also proceed if rootDeclaration is a parameter and if its containing function expression/arrow function is contextually typed -
-                    // type of parameter will flow in from the contextual type of the function
-                    let canGetType = !!(rootDeclaration.initializer || rootDeclaration.type);
-                    if (!canGetType && rootDeclaration.kind === SyntaxKind.Parameter) {
-                        if (isExpression(rootDeclaration.parent)) {
-                            canGetType = !!typeChecker.getContextualType(<Expression>rootDeclaration.parent);
-                        }
-                        else if (rootDeclaration.parent.kind === SyntaxKind.MethodDeclaration || rootDeclaration.parent.kind === SyntaxKind.SetAccessor) {
-                            canGetType = isExpression(rootDeclaration.parent.parent) && !!typeChecker.getContextualType(<Expression>rootDeclaration.parent.parent);
-                        }
+                if (!isVariableLike(rootDeclaration)) throw Debug.fail("Root declaration is not variable-like.");
+
+                // We don't want to complete using the type acquired by the shape
+                // of the binding pattern; we are only interested in types acquired
+                // through type declaration or inference.
+                // Also proceed if rootDeclaration is a parameter and if its containing function expression/arrow function is contextually typed -
+                // type of parameter will flow in from the contextual type of the function
+                let canGetType = rootDeclaration.initializer || rootDeclaration.type || rootDeclaration.parent.parent.kind === SyntaxKind.ForOfStatement;
+                if (!canGetType && rootDeclaration.kind === SyntaxKind.Parameter) {
+                    if (isExpression(rootDeclaration.parent)) {
+                        canGetType = !!typeChecker.getContextualType(<Expression>rootDeclaration.parent);
                     }
-                    if (canGetType) {
-                        typeForObject = typeChecker.getTypeAtLocation(objectLikeContainer);
-                        existingMembers = (<ObjectBindingPattern>objectLikeContainer).elements;
+                    else if (rootDeclaration.parent.kind === SyntaxKind.MethodDeclaration || rootDeclaration.parent.kind === SyntaxKind.SetAccessor) {
+                        canGetType = isExpression(rootDeclaration.parent.parent) && !!typeChecker.getContextualType(<Expression>rootDeclaration.parent.parent);
                     }
                 }
-                else {
-                    Debug.fail("Root declaration is not variable-like.");
+                if (canGetType) {
+                    const typeForObject = typeChecker.getTypeAtLocation(objectLikeContainer);
+                    if (!typeForObject) return false;
+                    // In a binding pattern, get only known properties. Everywhere else we will get all possible properties.
+                    typeMembers = typeChecker.getPropertiesOfType(typeForObject);
+                    existingMembers = (<ObjectBindingPattern>objectLikeContainer).elements;
                 }
             }
-            else {
-                Debug.fail("Expected object literal or binding pattern, got " + objectLikeContainer.kind);
-            }
-
-            if (!typeForObject) {
-                return false;
-            }
 
-            const typeMembers = typeChecker.getPropertiesOfType(typeForObject);
             if (typeMembers && typeMembers.length > 0) {
                 // Add filtered items to the completion list
                 symbols = filterObjectMembersList(typeMembers, existingMembers);
@@ -1276,29 +1043,85 @@ namespace ts.Completions {
             isMemberCompletion = true;
             isNewIdentifierLocation = false;
 
-            let exports: Symbol[];
-            const moduleSpecifierSymbol = typeChecker.getSymbolAtLocation(importOrExportDeclaration.moduleSpecifier);
-            if (moduleSpecifierSymbol) {
-                exports = typeChecker.getExportsOfModule(moduleSpecifierSymbol);
+            const moduleSpecifierSymbol = typeChecker.getSymbolAtLocation(moduleSpecifier);
+            if (!moduleSpecifierSymbol) {
+                symbols = emptyArray;
+                return true;
             }
 
-            symbols = exports ? filterNamedImportOrExportCompletionItems(exports, namedImportsOrExports.elements) : emptyArray;
-
+            const exports = typeChecker.getExportsAndPropertiesOfModule(moduleSpecifierSymbol);
+            symbols = filterNamedImportOrExportCompletionItems(exports, namedImportsOrExports.elements);
             return true;
         }
 
+        /**
+         * Aggregates relevant symbols for completion in class declaration
+         * Relevant symbols are stored in the captured 'symbols' variable.
+         */
+        function getGetClassLikeCompletionSymbols(classLikeDeclaration: ClassLikeDeclaration) {
+            // We're looking up possible property names from parent type.
+            isMemberCompletion = true;
+            // Declaring new property/method/accessor
+            isNewIdentifierLocation = true;
+            // Has keywords for class elements
+            keywordFilters = KeywordCompletionFilters.ClassElementKeywords;
+
+            const baseTypeNode = getClassExtendsHeritageClauseElement(classLikeDeclaration);
+            const implementsTypeNodes = getClassImplementsHeritageClauseElements(classLikeDeclaration);
+            if (baseTypeNode || implementsTypeNodes) {
+                const classElement = contextToken.parent;
+                let classElementModifierFlags = isClassElement(classElement) && getModifierFlags(classElement);
+                // If this is context token is not something we are editing now, consider if this would lead to be modifier
+                if (contextToken.kind === SyntaxKind.Identifier && !isCurrentlyEditingNode(contextToken)) {
+                    switch (contextToken.getText()) {
+                        case "private":
+                            classElementModifierFlags = classElementModifierFlags | ModifierFlags.Private;
+                            break;
+                        case "static":
+                            classElementModifierFlags = classElementModifierFlags | ModifierFlags.Static;
+                            break;
+                    }
+                }
+
+                // No member list for private methods
+                if (!(classElementModifierFlags & ModifierFlags.Private)) {
+                    let baseClassTypeToGetPropertiesFrom: Type;
+                    if (baseTypeNode) {
+                        baseClassTypeToGetPropertiesFrom = typeChecker.getTypeAtLocation(baseTypeNode);
+                        if (classElementModifierFlags & ModifierFlags.Static) {
+                            // Use static class to get property symbols from
+                            baseClassTypeToGetPropertiesFrom = typeChecker.getTypeOfSymbolAtLocation(
+                                baseClassTypeToGetPropertiesFrom.symbol, classLikeDeclaration);
+                        }
+                    }
+                    const implementedInterfaceTypePropertySymbols = (classElementModifierFlags & ModifierFlags.Static) ?
+                        undefined :
+                        flatMap(implementsTypeNodes, typeNode => typeChecker.getPropertiesOfType(typeChecker.getTypeAtLocation(typeNode)));
+
+                    // List of property symbols of base type that are not private and already implemented
+                    symbols = filterClassMembersList(
+                        baseClassTypeToGetPropertiesFrom ?
+                            typeChecker.getPropertiesOfType(baseClassTypeToGetPropertiesFrom) :
+                            undefined,
+                        implementedInterfaceTypePropertySymbols,
+                        classLikeDeclaration.members,
+                        classElementModifierFlags);
+                }
+            }
+        }
+
         /**
          * Returns the immediate owning object literal or binding pattern of a context token,
          * on the condition that one exists and that the context implies completion should be given.
          */
-        function tryGetObjectLikeCompletionContainer(contextToken: Node): ObjectLiteralExpression | BindingPattern {
+        function tryGetObjectLikeCompletionContainer(contextToken: Node): ObjectLiteralExpression | ObjectBindingPattern {
             if (contextToken) {
                 switch (contextToken.kind) {
                     case SyntaxKind.OpenBraceToken:  // const x = { |
                     case SyntaxKind.CommaToken:      // const x = { a: 0, |
                         const parent = contextToken.parent;
-                        if (parent && (parent.kind === SyntaxKind.ObjectLiteralExpression || parent.kind === SyntaxKind.ObjectBindingPattern)) {
-                            return <ObjectLiteralExpression | BindingPattern>parent;
+                        if (isObjectLiteralExpression(parent) || isObjectBindingPattern(parent)) {
+                            return parent;
                         }
                         break;
                 }
@@ -1327,6 +1150,85 @@ namespace ts.Completions {
             return undefined;
         }
 
+        function isFromClassElementDeclaration(node: Node) {
+            return isClassElement(node.parent) && isClassLike(node.parent.parent);
+        }
+
+        function isParameterOfConstructorDeclaration(node: Node) {
+            return isParameter(node) && isConstructorDeclaration(node.parent);
+        }
+
+        function isConstructorParameterCompletion(node: Node) {
+            return node.parent &&
+                isParameterOfConstructorDeclaration(node.parent) &&
+                (isConstructorParameterCompletionKeyword(node.kind) || isDeclarationName(node));
+        }
+
+        /**
+         * Returns the immediate owning class declaration of a context token,
+         * on the condition that one exists and that the context implies completion should be given.
+         */
+        function tryGetClassLikeCompletionContainer(contextToken: Node): ClassLikeDeclaration {
+            if (contextToken) {
+                switch (contextToken.kind) {
+                    case SyntaxKind.OpenBraceToken:  // class c { |
+                        if (isClassLike(contextToken.parent)) {
+                            return contextToken.parent;
+                        }
+                        break;
+
+                    // class c {getValue(): number, | }
+                    case SyntaxKind.CommaToken:
+                        if (isClassLike(contextToken.parent)) {
+                            return contextToken.parent;
+                        }
+                        break;
+
+                    // class c {getValue(): number; | }
+                    case SyntaxKind.SemicolonToken:
+                    // class c { method() { } | }
+                    case SyntaxKind.CloseBraceToken:
+                        if (isClassLike(location)) {
+                            return location;
+                        }
+                        break;
+
+                    default:
+                        if (isFromClassElementDeclaration(contextToken) &&
+                            (isClassMemberCompletionKeyword(contextToken.kind) ||
+                                isClassMemberCompletionKeywordText(contextToken.getText()))) {
+                            return contextToken.parent.parent as ClassLikeDeclaration;
+                        }
+                }
+            }
+
+            // class c { method() { } | method2() { } }
+            if (location && location.kind === SyntaxKind.SyntaxList && isClassLike(location.parent)) {
+                return location.parent;
+            }
+            return undefined;
+        }
+
+        /**
+         * Returns the immediate owning class declaration of a context token,
+         * on the condition that one exists and that the context implies completion should be given.
+         */
+        function tryGetConstructorLikeCompletionContainer(contextToken: Node): ConstructorDeclaration {
+            if (contextToken) {
+                switch (contextToken.kind) {
+                    case SyntaxKind.OpenParenToken:
+                    case SyntaxKind.CommaToken:
+                        return  isConstructorDeclaration(contextToken.parent) && contextToken.parent;
+
+                    default:
+                        if (isConstructorParameterCompletion(contextToken)) {
+                            return contextToken.parent.parent as ConstructorDeclaration;
+                        }
+                }
+            }
+            return undefined;
+        }
+
         function tryGetContainingJsxElement(contextToken: Node): JsxOpeningLikeElement {
             if (contextToken) {
                 const parent = contextToken.parent;
@@ -1334,13 +1236,19 @@ namespace ts.Completions {
                     case SyntaxKind.LessThanSlashToken:
                     case SyntaxKind.SlashToken:
                     case SyntaxKind.Identifier:
+                    case SyntaxKind.PropertyAccessExpression:
+                    case SyntaxKind.JsxAttributes:
                     case SyntaxKind.JsxAttribute:
                     case SyntaxKind.JsxSpreadAttribute:
                         if (parent && (parent.kind === SyntaxKind.JsxSelfClosingElement || parent.kind === SyntaxKind.JsxOpeningElement)) {
                             return <JsxOpeningLikeElement>parent;
                         }
                         else if (parent.kind === SyntaxKind.JsxAttribute) {
-                            return <JsxOpeningLikeElement>parent.parent;
+                            // Currently we parse JsxOpeningLikeElement as:
+                            //      JsxOpeningLikeElement
+                            //          attributes: JsxAttributes
+                            //             properties: NodeArray<JsxAttributeLike>
+                            return parent.parent.parent as JsxOpeningLikeElement;
                         }
                         break;
 
@@ -1349,7 +1257,11 @@ namespace ts.Completions {
                     // whose parent is a JsxOpeningLikeElement
                     case SyntaxKind.StringLiteral:
                         if (parent && ((parent.kind === SyntaxKind.JsxAttribute) || (parent.kind === SyntaxKind.JsxSpreadAttribute))) {
-                            return <JsxOpeningLikeElement>parent.parent;
+                            // Currently we parse JsxOpeningLikeElement as:
+                            //      JsxOpeningLikeElement
+                            //          attributes: JsxAttributes
+                            //             properties: NodeArray<JsxAttributeLike>
+                            return parent.parent.parent as JsxOpeningLikeElement;
                         }
 
                         break;
@@ -1357,13 +1269,21 @@ namespace ts.Completions {
                     case SyntaxKind.CloseBraceToken:
                         if (parent &&
                             parent.kind === SyntaxKind.JsxExpression &&
-                            parent.parent &&
-                            (parent.parent.kind === SyntaxKind.JsxAttribute)) {
-                            return <JsxOpeningLikeElement>parent.parent.parent;
+                            parent.parent && parent.parent.kind === SyntaxKind.JsxAttribute) {
+                            // Currently we parse JsxOpeningLikeElement as:
+                            //      JsxOpeningLikeElement
+                            //          attributes: JsxAttributes
+                            //             properties: NodeArray<JsxAttributeLike>
+                            //                  each JsxAttribute can have initializer as JsxExpression
+                            return parent.parent.parent.parent as JsxOpeningLikeElement;
                         }
 
                         if (parent && parent.kind === SyntaxKind.JsxSpreadAttribute) {
-                            return <JsxOpeningLikeElement>parent.parent;
+                            // Currently we parse JsxOpeningLikeElement as:
+                            //      JsxOpeningLikeElement
+                            //          attributes: JsxAttributes
+                            //             properties: NodeArray<JsxAttributeLike>
+                            return parent.parent.parent as JsxOpeningLikeElement;
                         }
 
                         break;
@@ -1372,23 +1292,6 @@ namespace ts.Completions {
             return undefined;
         }
 
-        function isFunction(kind: SyntaxKind): boolean {
-            switch (kind) {
-                case SyntaxKind.FunctionExpression:
-                case SyntaxKind.ArrowFunction:
-                case SyntaxKind.FunctionDeclaration:
-                case SyntaxKind.MethodDeclaration:
-                case SyntaxKind.MethodSignature:
-                case SyntaxKind.GetAccessor:
-                case SyntaxKind.SetAccessor:
-                case SyntaxKind.CallSignature:
-                case SyntaxKind.ConstructSignature:
-                case SyntaxKind.IndexSignature:
-                    return true;
-            }
-            return false;
-        }
-
         /**
          * @returns true if we are certain that the currently edited location must define a new location; false otherwise.
          */
@@ -1400,12 +1303,15 @@ namespace ts.Completions {
                         containingNodeKind === SyntaxKind.VariableDeclarationList ||
                         containingNodeKind === SyntaxKind.VariableStatement ||
                         containingNodeKind === SyntaxKind.EnumDeclaration ||                        // enum a { foo, |
-                        isFunction(containingNodeKind) ||
-                        containingNodeKind === SyntaxKind.ClassDeclaration ||                       // class A<T, |
-                        containingNodeKind === SyntaxKind.ClassExpression ||                        // var C = class D<T, |
+                        isFunctionLikeButNotConstructor(containingNodeKind) ||
                         containingNodeKind === SyntaxKind.InterfaceDeclaration ||                   // interface A<T, |
                         containingNodeKind === SyntaxKind.ArrayBindingPattern ||                    // var [x, y|
-                        containingNodeKind === SyntaxKind.TypeAliasDeclaration;                     // type Map, K, |
+                        containingNodeKind === SyntaxKind.TypeAliasDeclaration ||                   // type Map, K, |
+                        // class A<T, |
+                        // var C = class D<T, |
+                        (isClassLike(contextToken.parent) &&
+                            contextToken.parent.typeParameters &&
+                            contextToken.parent.typeParameters.end >= contextToken.pos);
 
                 case SyntaxKind.DotToken:
                     return containingNodeKind === SyntaxKind.ArrayBindingPattern;                   // var [.|
@@ -1418,7 +1324,7 @@ namespace ts.Completions {
 
                 case SyntaxKind.OpenParenToken:
                     return containingNodeKind === SyntaxKind.CatchClause ||
-                        isFunction(containingNodeKind);
+                        isFunctionLikeButNotConstructor(containingNodeKind);
 
                 case SyntaxKind.OpenBraceToken:
                     return containingNodeKind === SyntaxKind.EnumDeclaration ||                     // enum a { |
@@ -1436,10 +1342,10 @@ namespace ts.Completions {
                         containingNodeKind === SyntaxKind.ClassExpression ||                        // var C = class D< |
                         containingNodeKind === SyntaxKind.InterfaceDeclaration ||                   // interface A< |
                         containingNodeKind === SyntaxKind.TypeAliasDeclaration ||                   // type List< |
-                        isFunction(containingNodeKind);
+                        isFunctionLikeKind(containingNodeKind);
 
                 case SyntaxKind.StaticKeyword:
-                    return containingNodeKind === SyntaxKind.PropertyDeclaration;
+                    return containingNodeKind === SyntaxKind.PropertyDeclaration && !isClassLike(contextToken.parent.parent);
 
                 case SyntaxKind.DotDotDotToken:
                     return containingNodeKind === SyntaxKind.Parameter ||
@@ -1449,20 +1355,24 @@ namespace ts.Completions {
                 case SyntaxKind.PublicKeyword:
                 case SyntaxKind.PrivateKeyword:
                 case SyntaxKind.ProtectedKeyword:
-                    return containingNodeKind === SyntaxKind.Parameter;
+                    return containingNodeKind === SyntaxKind.Parameter && !isConstructorDeclaration(contextToken.parent.parent);
 
                 case SyntaxKind.AsKeyword:
                     return containingNodeKind === SyntaxKind.ImportSpecifier ||
                         containingNodeKind === SyntaxKind.ExportSpecifier ||
                         containingNodeKind === SyntaxKind.NamespaceImport;
 
+                case SyntaxKind.GetKeyword:
+                case SyntaxKind.SetKeyword:
+                    if (isFromClassElementDeclaration(contextToken)) {
+                        return false;
+                    }
+                // falls through
                 case SyntaxKind.ClassKeyword:
                 case SyntaxKind.EnumKeyword:
                 case SyntaxKind.InterfaceKeyword:
                 case SyntaxKind.FunctionKeyword:
                 case SyntaxKind.VarKeyword:
-                case SyntaxKind.GetKeyword:
-                case SyntaxKind.SetKeyword:
                 case SyntaxKind.ImportKeyword:
                 case SyntaxKind.LetKeyword:
                 case SyntaxKind.ConstKeyword:
@@ -1471,6 +1381,25 @@ namespace ts.Completions {
                     return true;
             }
 
+            // If the previous token is keyword correspoding to class member completion keyword
+            // there will be completion available here
+            if (isClassMemberCompletionKeywordText(contextToken.getText()) &&
+                isFromClassElementDeclaration(contextToken)) {
+                return false;
+            }
+
+            if (isConstructorParameterCompletion(contextToken)) {
+                // constructor parameter completion is available only if
+                // - its modifier of the constructor parameter or
+                // - its name of the parameter and not being edited
+                // eg. constructor(a |<- this shouldnt show completion
+                if (!isIdentifier(contextToken) ||
+                    isConstructorParameterCompletionKeywordText(contextToken.getText()) ||
+                    isCurrentlyEditingNode(contextToken)) {
+                    return false;
+                }
+            }
+
             // Previous token may have been a keyword that was converted to an identifier.
             switch (contextToken.getText()) {
                 case "abstract":
@@ -1491,7 +1420,11 @@ namespace ts.Completions {
                     return true;
             }
 
-            return false;
+            return isDeclarationName(contextToken) && !isJsxAttribute(contextToken.parent);
+        }
+
+        function isFunctionLikeButNotConstructor(kind: SyntaxKind) {
+            return isFunctionLikeKind(kind) && kind !== SyntaxKind.Constructor;
         }
 
         function isDotOfNumericLiteral(contextToken: Node): boolean {
@@ -1517,19 +1450,19 @@ namespace ts.Completions {
 
             for (const element of namedImportsOrExports) {
                 // If this is the current item we are editing right now, do not filter it out
-                if (element.getStart() <= position && position <= element.getEnd()) {
+                if (isCurrentlyEditingNode(element)) {
                     continue;
                 }
 
                 const name = element.propertyName || element.name;
-                existingImportsOrExports[name.text] = true;
+                existingImportsOrExports.set(name.text, true);
             }
 
-            if (!someProperties(existingImportsOrExports)) {
+            if (existingImportsOrExports.size === 0) {
                 return filter(exportsOfModule, e => e.name !== "default");
             }
 
-            return filter(exportsOfModule, e => e.name !== "default" && !existingImportsOrExports[e.name]);
+            return filter(exportsOfModule, e => e.name !== "default" && !existingImportsOrExports.get(e.name));
         }
 
         /**
@@ -1549,12 +1482,14 @@ namespace ts.Completions {
                 if (m.kind !== SyntaxKind.PropertyAssignment &&
                     m.kind !== SyntaxKind.ShorthandPropertyAssignment &&
                     m.kind !== SyntaxKind.BindingElement &&
-                    m.kind !== SyntaxKind.MethodDeclaration) {
+                    m.kind !== SyntaxKind.MethodDeclaration &&
+                    m.kind !== SyntaxKind.GetAccessor &&
+                    m.kind !== SyntaxKind.SetAccessor) {
                     continue;
                 }
 
                 // If this is the current item we are editing right now, do not filter it out
-                if (m.getStart() <= position && position <= m.getEnd()) {
+                if (isCurrentlyEditingNode(m)) {
                     continue;
                 }
 
@@ -1570,13 +1505,65 @@ namespace ts.Completions {
                     // TODO(jfreeman): Account for computed property name
                     // NOTE: if one only performs this step when m.name is an identifier,
                     // things like '__proto__' are not filtered out.
-                    existingName = (<Identifier>m.name).text;
+                    existingName = (getNameOfDeclaration(m) as Identifier).text;
+                }
+
+                existingMemberNames.set(existingName, true);
+            }
+
+            return filter(contextualMemberSymbols, m => !existingMemberNames.get(m.name));
+        }
+
+        /**
+         * Filters out completion suggestions for class elements.
+         *
+         * @returns Symbols to be suggested in an class element depending on existing memebers and symbol flags
+         */
+        function filterClassMembersList(baseSymbols: Symbol[], implementingTypeSymbols: Symbol[], existingMembers: ClassElement[], currentClassElementModifierFlags: ModifierFlags): Symbol[] {
+            const existingMemberNames = createMap<boolean>();
+            for (const m of existingMembers) {
+                // Ignore omitted expressions for missing members
+                if (m.kind !== SyntaxKind.PropertyDeclaration &&
+                    m.kind !== SyntaxKind.MethodDeclaration &&
+                    m.kind !== SyntaxKind.GetAccessor &&
+                    m.kind !== SyntaxKind.SetAccessor) {
+                    continue;
+                }
+
+                // If this is the current item we are editing right now, do not filter it out
+                if (isCurrentlyEditingNode(m)) {
+                    continue;
+                }
+
+                // Dont filter member even if the name matches if it is declared private in the list
+                if (hasModifier(m, ModifierFlags.Private)) {
+                    continue;
+                }
+
+                // do not filter it out if the static presence doesnt match
+                const mIsStatic = hasModifier(m, ModifierFlags.Static);
+                const currentElementIsStatic = !!(currentClassElementModifierFlags & ModifierFlags.Static);
+                if ((mIsStatic && !currentElementIsStatic) ||
+                    (!mIsStatic && currentElementIsStatic)) {
+                    continue;
                 }
 
-                existingMemberNames[existingName] = true;
+                const existingName = getPropertyNameForPropertyNameNode(m.name);
+                if (existingName) {
+                    existingMemberNames.set(existingName, true);
+                }
             }
 
-            return filter(contextualMemberSymbols, m => !existingMemberNames[m.name]);
+            return concatenate(
+                filter(baseSymbols, baseProperty => isValidProperty(baseProperty, ModifierFlags.Private)),
+                filter(implementingTypeSymbols, implementingProperty => isValidProperty(implementingProperty, ModifierFlags.NonPublicAccessibilityModifier))
+            );
+
+            function isValidProperty(propertySymbol: Symbol, inValidModifierFlags: ModifierFlags) {
+                return !existingMemberNames.get(propertySymbol.name) &&
+                    propertySymbol.getDeclarations() &&
+                    !(getDeclarationModifierFlagsFromSymbol(propertySymbol) & inValidModifierFlags);
+            }
         }
 
         /**
@@ -1589,16 +1576,20 @@ namespace ts.Completions {
             const seenNames = createMap<boolean>();
             for (const attr of attributes) {
                 // If this is the current item we are editing right now, do not filter it out
-                if (attr.getStart() <= position && position <= attr.getEnd()) {
+                if (isCurrentlyEditingNode(attr)) {
                     continue;
                 }
 
                 if (attr.kind === SyntaxKind.JsxAttribute) {
-                    seenNames[(<JsxAttribute>attr).name.text] = true;
+                    seenNames.set((<JsxAttribute>attr).name.text, true);
                 }
             }
 
-            return filter(symbols, a => !seenNames[a.name]);
+            return filter(symbols, a => !seenNames.get(a.name));
+        }
+
+        function isCurrentlyEditingNode(node: Node): boolean {
+            return node.getStart() <= position && position <= node.getEnd();
         }
     }
 
@@ -1652,60 +1643,119 @@ namespace ts.Completions {
     }
 
     // A cache of completion entries for keywords, these do not change between sessions
-    const keywordCompletions: CompletionEntry[] = [];
-    for (let i = SyntaxKind.FirstKeyword; i <= SyntaxKind.LastKeyword; i++) {
-        keywordCompletions.push({
-            name: tokenToString(i),
-            kind: ScriptElementKind.keyword,
-            kindModifiers: ScriptElementKindModifier.none,
-            sortText: "0"
-        });
-    }
+    const _keywordCompletions: CompletionEntry[][] = [];
+    function getKeywordCompletions(keywordFilter: KeywordCompletionFilters): CompletionEntry[] {
+        const completions = _keywordCompletions[keywordFilter];
+        if (completions) {
+            return completions;
+        }
+        return _keywordCompletions[keywordFilter] = generateKeywordCompletions(keywordFilter);
+
+        type FilterKeywordCompletions = (entryName: string) => boolean;
+        function generateKeywordCompletions(keywordFilter: KeywordCompletionFilters) {
+            switch (keywordFilter) {
+                case KeywordCompletionFilters.None:
+                    return getAllKeywordCompletions();
+                case KeywordCompletionFilters.ClassElementKeywords:
+                    return getFilteredKeywordCompletions(isClassMemberCompletionKeywordText);
+                case KeywordCompletionFilters.ConstructorParameterKeywords:
+                    return getFilteredKeywordCompletions(isConstructorParameterCompletionKeywordText);
+            }
+        }
+
+        function getAllKeywordCompletions() {
+            const allKeywordsCompletions: CompletionEntry[] = [];
+            for (let i = SyntaxKind.FirstKeyword; i <= SyntaxKind.LastKeyword; i++) {
+                allKeywordsCompletions.push({
+                    name: tokenToString(i),
+                    kind: ScriptElementKind.keyword,
+                    kindModifiers: ScriptElementKindModifier.none,
+                    sortText: "0"
+                });
+            }
+            return allKeywordsCompletions;
+        }
 
-    /**
-     * Matches a triple slash reference directive with an incomplete string literal for its path. Used
-     * to determine if the caret is currently within the string literal and capture the literal fragment
-     * for completions.
-     * For example, this matches /// <reference path="fragment
-     */
-    const tripleSlashDirectiveFragmentRegex = /^(\/\/\/\s*<reference\s+(path|types)\s*=\s*(?:'|"))([^\3]*)$/;
+        function getFilteredKeywordCompletions(filterFn: FilterKeywordCompletions) {
+            return filter(
+                getKeywordCompletions(KeywordCompletionFilters.None),
+                entry => filterFn(entry.name)
+            );
+        }
+    }
 
-    interface VisibleModuleInfo {
-        moduleName: string;
-        moduleDir: string;
+    function isClassMemberCompletionKeyword(kind: SyntaxKind) {
+        switch (kind) {
+            case SyntaxKind.PublicKeyword:
+            case SyntaxKind.ProtectedKeyword:
+            case SyntaxKind.PrivateKeyword:
+            case SyntaxKind.AbstractKeyword:
+            case SyntaxKind.StaticKeyword:
+            case SyntaxKind.ConstructorKeyword:
+            case SyntaxKind.ReadonlyKeyword:
+            case SyntaxKind.GetKeyword:
+            case SyntaxKind.SetKeyword:
+            case SyntaxKind.AsyncKeyword:
+                return true;
+        }
     }
 
-    const nodeModulesDependencyKeys = ["dependencies", "devDependencies", "peerDependencies", "optionalDependencies"];
+    function isClassMemberCompletionKeywordText(text: string) {
+        return isClassMemberCompletionKeyword(stringToToken(text));
+    }
 
-    function tryGetDirectories(host: LanguageServiceHost, directoryName: string): string[] {
-        return tryIOAndConsumeErrors(host, host.getDirectories, directoryName);
+    function isConstructorParameterCompletionKeyword(kind: SyntaxKind) {
+        switch (kind) {
+            case SyntaxKind.PublicKeyword:
+            case SyntaxKind.PrivateKeyword:
+            case SyntaxKind.ProtectedKeyword:
+            case SyntaxKind.ReadonlyKeyword:
+                return true;
+        }
     }
 
-    function tryReadDirectory(host: LanguageServiceHost, path: string, extensions?: string[], exclude?: string[], include?: string[]): string[] {
-        return tryIOAndConsumeErrors(host, host.readDirectory, path, extensions, exclude, include);
+    function isConstructorParameterCompletionKeywordText(text: string) {
+        return isConstructorParameterCompletionKeyword(stringToToken(text));
     }
 
-    function tryReadFile(host: LanguageServiceHost, path: string): string {
-        return tryIOAndConsumeErrors(host, host.readFile, path);
+    function isEqualityExpression(node: Node): node is BinaryExpression {
+        return isBinaryExpression(node) && isEqualityOperatorKind(node.operatorToken.kind);
     }
 
-    function tryFileExists(host: LanguageServiceHost, path: string): boolean {
-        return tryIOAndConsumeErrors(host, host.fileExists, path);
+    function isEqualityOperatorKind(kind: SyntaxKind) {
+        return kind === SyntaxKind.EqualsEqualsToken ||
+            kind === SyntaxKind.ExclamationEqualsToken ||
+            kind === SyntaxKind.EqualsEqualsEqualsToken ||
+            kind === SyntaxKind.ExclamationEqualsEqualsToken;
     }
 
-    function tryDirectoryExists(host: LanguageServiceHost, path: string): boolean {
-        try {
-            return directoryProbablyExists(path, host);
+    /** Get the corresponding JSDocTag node if the position is in a jsDoc comment */
+    function getJsDocTagAtPosition(node: Node, position: number): JSDocTag | undefined {
+        const { jsDoc } = getJsDocHavingNode(node);
+        if (!jsDoc) return undefined;
+
+        for (const { pos, end, tags } of jsDoc) {
+            if (!tags || position < pos || position > end) continue;
+            for (let i = tags.length - 1; i >= 0; i--) {
+                const tag = tags[i];
+                if (position >= tag.pos) {
+                    return tag;
+                }
+            }
         }
-        catch (e) {}
-        return undefined;
     }
 
-    function tryIOAndConsumeErrors<T>(host: LanguageServiceHost, toApply: (...a: any[]) => T, ...args: any[]) {
-        try {
-            return toApply && toApply.apply(host, args);
+    function getJsDocHavingNode(node: Node): Node {
+        if (!isToken(node)) return node;
+
+        switch (node.kind) {
+            case SyntaxKind.VarKeyword:
+            case SyntaxKind.LetKeyword:
+            case SyntaxKind.ConstKeyword:
+                // if the current token is var, let or const, skip the VariableDeclarationList
+                return node.parent.parent;
+            default:
+                return node.parent;
         }
-        catch (e) {}
-        return undefined;
     }
 }
diff --git a/src/services/documentHighlights.ts b/src/services/documentHighlights.ts
index 0f18427..7ea8c51 100644
--- a/src/services/documentHighlights.ts
+++ b/src/services/documentHighlights.ts
@@ -1,625 +1,601 @@
 /* @internal */
 namespace ts.DocumentHighlights {
-    export function getDocumentHighlights(typeChecker: TypeChecker, cancellationToken: CancellationToken, sourceFile: SourceFile, position: number, sourceFilesToSearch: SourceFile[]): DocumentHighlights[] {
-        const node = getTouchingWord(sourceFile, position);
-        if (!node) {
-            return undefined;
+    export function getDocumentHighlights(program: Program, cancellationToken: CancellationToken, sourceFile: SourceFile, position: number, sourceFilesToSearch: SourceFile[]): DocumentHighlights[] | undefined {
+        const node = getTouchingWord(sourceFile, position, /*includeJsDocComment*/ true);
+        if (!node) return undefined;
+
+        if (isJsxOpeningElement(node.parent) && node.parent.tagName === node || isJsxClosingElement(node.parent)) {
+            // For a JSX element, just highlight the matching tag, not all references.
+            const { openingElement, closingElement } = node.parent.parent;
+            const highlightSpans = [openingElement, closingElement].map(({ tagName }) => getHighlightSpanForNode(tagName, sourceFile));
+            return [{ fileName: sourceFile.fileName, highlightSpans }];
         }
 
-        return getSemanticDocumentHighlights(node) || getSyntacticDocumentHighlights(node);
+        return getSemanticDocumentHighlights(node, program, cancellationToken, sourceFilesToSearch) || getSyntacticDocumentHighlights(node, sourceFile);
+    }
+
+    function getHighlightSpanForNode(node: Node, sourceFile: SourceFile): HighlightSpan {
+        return {
+            fileName: sourceFile.fileName,
+            textSpan: createTextSpanFromNode(node, sourceFile),
+            kind: HighlightSpanKind.none
+        };
+    }
 
-        function getHighlightSpanForNode(node: Node): HighlightSpan {
-            const start = node.getStart();
-            const end = node.getEnd();
+    function getSemanticDocumentHighlights(node: Node, program: Program, cancellationToken: CancellationToken, sourceFilesToSearch: SourceFile[]): DocumentHighlights[] {
+        const referenceEntries = FindAllReferences.getReferenceEntriesForNode(node, program, sourceFilesToSearch, cancellationToken);
+        return referenceEntries && convertReferencedSymbols(referenceEntries);
+    }
 
-            return {
-                fileName: sourceFile.fileName,
-                textSpan: createTextSpanFromBounds(start, end),
-                kind: HighlightSpanKind.none
-            };
+    function convertReferencedSymbols(referenceEntries: FindAllReferences.Entry[]): DocumentHighlights[] {
+        const fileNameToDocumentHighlights = createMap<HighlightSpan[]>();
+        for (const entry of referenceEntries) {
+            const { fileName, span } = FindAllReferences.toHighlightSpan(entry);
+            let highlightSpans = fileNameToDocumentHighlights.get(fileName);
+            if (!highlightSpans) {
+                fileNameToDocumentHighlights.set(fileName, highlightSpans = []);
+            }
+            highlightSpans.push(span);
         }
 
-        function getSemanticDocumentHighlights(node: Node): DocumentHighlights[] {
-            if (node.kind === SyntaxKind.Identifier ||
-                node.kind === SyntaxKind.ThisKeyword ||
-                node.kind === SyntaxKind.ThisType ||
-                node.kind === SyntaxKind.SuperKeyword ||
-                node.kind === SyntaxKind.StringLiteral ||
-                isLiteralNameOfPropertyDeclarationOrIndexAccess(node)) {
+        return arrayFrom(fileNameToDocumentHighlights.entries(), ([fileName, highlightSpans ]) => ({ fileName, highlightSpans }));
+    }
 
-                const referencedSymbols = FindAllReferences.getReferencedSymbolsForNode(typeChecker, cancellationToken, node, sourceFilesToSearch, /*findInStrings*/ false, /*findInComments*/ false, /*implementations*/false);
-                return convertReferencedSymbols(referencedSymbols);
+    function getSyntacticDocumentHighlights(node: Node, sourceFile: SourceFile): DocumentHighlights[] {
+        const highlightSpans = getHighlightSpans(node, sourceFile);
+        if (!highlightSpans || highlightSpans.length === 0) {
+            return undefined;
+        }
 
-            }
+        return [{ fileName: sourceFile.fileName, highlightSpans }];
+    }
 
+    // returns true if 'node' is defined and has a matching 'kind'.
+    function hasKind(node: Node, kind: SyntaxKind) {
+        return node !== undefined && node.kind === kind;
+    }
+
+    // Null-propagating 'parent' function.
+    function parent(node: Node): Node {
+        return node && node.parent;
+    }
+
+    function getHighlightSpans(node: Node, sourceFile: SourceFile): HighlightSpan[] {
+        if (!node) {
             return undefined;
+        }
 
-            function convertReferencedSymbols(referencedSymbols: ReferencedSymbol[]): DocumentHighlights[] {
-                if (!referencedSymbols) {
-                    return undefined;
+        switch (node.kind) {
+            case SyntaxKind.IfKeyword:
+            case SyntaxKind.ElseKeyword:
+                if (hasKind(node.parent, SyntaxKind.IfStatement)) {
+                    return getIfElseOccurrences(<IfStatement>node.parent, sourceFile);
                 }
-
-                const fileNameToDocumentHighlights = createMap<DocumentHighlights>();
-                const result: DocumentHighlights[] = [];
-                for (const referencedSymbol of referencedSymbols) {
-                    for (const referenceEntry of referencedSymbol.references) {
-                        const fileName = referenceEntry.fileName;
-                        let documentHighlights = fileNameToDocumentHighlights[fileName];
-                        if (!documentHighlights) {
-                            documentHighlights = { fileName, highlightSpans: [] };
-
-                            fileNameToDocumentHighlights[fileName] = documentHighlights;
-                            result.push(documentHighlights);
-                        }
-
-                        documentHighlights.highlightSpans.push({
-                            textSpan: referenceEntry.textSpan,
-                            kind: referenceEntry.isWriteAccess ? HighlightSpanKind.writtenReference : HighlightSpanKind.reference
-                        });
-                    }
+                break;
+            case SyntaxKind.ReturnKeyword:
+                if (hasKind(node.parent, SyntaxKind.ReturnStatement)) {
+                    return highlightSpans(getReturnOccurrences(<ReturnStatement>node.parent));
+                }
+                break;
+            case SyntaxKind.ThrowKeyword:
+                if (hasKind(node.parent, SyntaxKind.ThrowStatement)) {
+                    return highlightSpans(getThrowOccurrences(<ThrowStatement>node.parent));
+                }
+                break;
+            case SyntaxKind.TryKeyword:
+            case SyntaxKind.CatchKeyword:
+            case SyntaxKind.FinallyKeyword:
+                const tryStatement = node.kind === SyntaxKind.CatchKeyword ? parent(parent(node)) : parent(node);
+                if (hasKind(tryStatement, SyntaxKind.TryStatement)) {
+                    return highlightSpans(getTryCatchFinallyOccurrences(<TryStatement>tryStatement, sourceFile));
+                }
+                break;
+            case SyntaxKind.SwitchKeyword:
+                if (hasKind(node.parent, SyntaxKind.SwitchStatement)) {
+                    return highlightSpans(getSwitchCaseDefaultOccurrences(<SwitchStatement>node.parent));
+                }
+                break;
+            case SyntaxKind.CaseKeyword:
+            case SyntaxKind.DefaultKeyword:
+                if (hasKind(parent(parent(parent(node))), SyntaxKind.SwitchStatement)) {
+                    return highlightSpans(getSwitchCaseDefaultOccurrences(<SwitchStatement>node.parent.parent.parent));
+                }
+                break;
+            case SyntaxKind.BreakKeyword:
+            case SyntaxKind.ContinueKeyword:
+                if (hasKind(node.parent, SyntaxKind.BreakStatement) || hasKind(node.parent, SyntaxKind.ContinueStatement)) {
+                    return highlightSpans(getBreakOrContinueStatementOccurrences(<BreakOrContinueStatement>node.parent));
+                }
+                break;
+            case SyntaxKind.ForKeyword:
+                if (hasKind(node.parent, SyntaxKind.ForStatement) ||
+                    hasKind(node.parent, SyntaxKind.ForInStatement) ||
+                    hasKind(node.parent, SyntaxKind.ForOfStatement)) {
+                    return highlightSpans(getLoopBreakContinueOccurrences(<IterationStatement>node.parent));
+                }
+                break;
+            case SyntaxKind.WhileKeyword:
+            case SyntaxKind.DoKeyword:
+                if (hasKind(node.parent, SyntaxKind.WhileStatement) || hasKind(node.parent, SyntaxKind.DoStatement)) {
+                    return highlightSpans(getLoopBreakContinueOccurrences(<IterationStatement>node.parent));
+                }
+                break;
+            case SyntaxKind.ConstructorKeyword:
+                if (hasKind(node.parent, SyntaxKind.Constructor)) {
+                    return highlightSpans(getConstructorOccurrences(<ConstructorDeclaration>node.parent));
+                }
+                break;
+            case SyntaxKind.GetKeyword:
+            case SyntaxKind.SetKeyword:
+                if (hasKind(node.parent, SyntaxKind.GetAccessor) || hasKind(node.parent, SyntaxKind.SetAccessor)) {
+                    return highlightSpans(getGetAndSetOccurrences(<AccessorDeclaration>node.parent));
+                }
+                break;
+            default:
+                if (isModifierKind(node.kind) && node.parent &&
+                    (isDeclaration(node.parent) || node.parent.kind === SyntaxKind.VariableStatement)) {
+                    return highlightSpans(getModifierOccurrences(node.kind, node.parent));
                 }
-
-                return result;
-            }
         }
 
-        function getSyntacticDocumentHighlights(node: Node): DocumentHighlights[] {
-            const fileName = sourceFile.fileName;
+        function highlightSpans(nodes: Node[]): HighlightSpan[] {
+            return nodes && nodes.map(node => getHighlightSpanForNode(node, sourceFile));
+        }
+    }
 
-            const highlightSpans = getHighlightSpans(node);
-            if (!highlightSpans || highlightSpans.length === 0) {
-                return undefined;
+    /**
+     * Aggregates all throw-statements within this node *without* crossing
+     * into function boundaries and try-blocks with catch-clauses.
+     */
+    function aggregateOwnedThrowStatements(node: Node): ThrowStatement[] {
+        const statementAccumulator: ThrowStatement[] = [];
+        aggregate(node);
+        return statementAccumulator;
+
+        function aggregate(node: Node): void {
+            if (node.kind === SyntaxKind.ThrowStatement) {
+                statementAccumulator.push(<ThrowStatement>node);
             }
+            else if (node.kind === SyntaxKind.TryStatement) {
+                const tryStatement = <TryStatement>node;
 
-            return [{ fileName, highlightSpans }];
+                if (tryStatement.catchClause) {
+                    aggregate(tryStatement.catchClause);
+                }
+                else {
+                    // Exceptions thrown within a try block lacking a catch clause
+                    // are "owned" in the current context.
+                    aggregate(tryStatement.tryBlock);
+                }
 
-            // returns true if 'node' is defined and has a matching 'kind'.
-            function hasKind(node: Node, kind: SyntaxKind) {
-                return node !== undefined && node.kind === kind;
+                if (tryStatement.finallyBlock) {
+                    aggregate(tryStatement.finallyBlock);
+                }
             }
-
-            // Null-propagating 'parent' function.
-            function parent(node: Node): Node {
-                return node && node.parent;
+            // Do not cross function boundaries.
+            else if (!isFunctionLike(node)) {
+                forEachChild(node, aggregate);
             }
+        }
+    }
 
-            function getHighlightSpans(node: Node): HighlightSpan[] {
-                if (node) {
-                    switch (node.kind) {
-                        case SyntaxKind.IfKeyword:
-                        case SyntaxKind.ElseKeyword:
-                            if (hasKind(node.parent, SyntaxKind.IfStatement)) {
-                                return getIfElseOccurrences(<IfStatement>node.parent);
-                            }
-                            break;
-                        case SyntaxKind.ReturnKeyword:
-                            if (hasKind(node.parent, SyntaxKind.ReturnStatement)) {
-                                return getReturnOccurrences(<ReturnStatement>node.parent);
-                            }
-                            break;
-                        case SyntaxKind.ThrowKeyword:
-                            if (hasKind(node.parent, SyntaxKind.ThrowStatement)) {
-                                return getThrowOccurrences(<ThrowStatement>node.parent);
-                            }
-                            break;
-                        case SyntaxKind.CatchKeyword:
-                            if (hasKind(parent(parent(node)), SyntaxKind.TryStatement)) {
-                                return getTryCatchFinallyOccurrences(<TryStatement>node.parent.parent);
-                            }
-                            break;
-                        case SyntaxKind.TryKeyword:
-                        case SyntaxKind.FinallyKeyword:
-                            if (hasKind(parent(node), SyntaxKind.TryStatement)) {
-                                return getTryCatchFinallyOccurrences(<TryStatement>node.parent);
-                            }
-                            break;
-                        case SyntaxKind.SwitchKeyword:
-                            if (hasKind(node.parent, SyntaxKind.SwitchStatement)) {
-                                return getSwitchCaseDefaultOccurrences(<SwitchStatement>node.parent);
-                            }
-                            break;
-                        case SyntaxKind.CaseKeyword:
-                        case SyntaxKind.DefaultKeyword:
-                            if (hasKind(parent(parent(parent(node))), SyntaxKind.SwitchStatement)) {
-                                return getSwitchCaseDefaultOccurrences(<SwitchStatement>node.parent.parent.parent);
-                            }
-                            break;
-                        case SyntaxKind.BreakKeyword:
-                        case SyntaxKind.ContinueKeyword:
-                            if (hasKind(node.parent, SyntaxKind.BreakStatement) || hasKind(node.parent, SyntaxKind.ContinueStatement)) {
-                                return getBreakOrContinueStatementOccurrences(<BreakOrContinueStatement>node.parent);
-                            }
-                            break;
-                        case SyntaxKind.ForKeyword:
-                            if (hasKind(node.parent, SyntaxKind.ForStatement) ||
-                                hasKind(node.parent, SyntaxKind.ForInStatement) ||
-                                hasKind(node.parent, SyntaxKind.ForOfStatement)) {
-                                return getLoopBreakContinueOccurrences(<IterationStatement>node.parent);
-                            }
-                            break;
-                        case SyntaxKind.WhileKeyword:
-                        case SyntaxKind.DoKeyword:
-                            if (hasKind(node.parent, SyntaxKind.WhileStatement) || hasKind(node.parent, SyntaxKind.DoStatement)) {
-                                return getLoopBreakContinueOccurrences(<IterationStatement>node.parent);
-                            }
-                            break;
-                        case SyntaxKind.ConstructorKeyword:
-                            if (hasKind(node.parent, SyntaxKind.Constructor)) {
-                                return getConstructorOccurrences(<ConstructorDeclaration>node.parent);
-                            }
-                            break;
-                        case SyntaxKind.GetKeyword:
-                        case SyntaxKind.SetKeyword:
-                            if (hasKind(node.parent, SyntaxKind.GetAccessor) || hasKind(node.parent, SyntaxKind.SetAccessor)) {
-                                return getGetAndSetOccurrences(<AccessorDeclaration>node.parent);
-                            }
-                            break;
-                        default:
-                            if (isModifierKind(node.kind) && node.parent &&
-                                (isDeclaration(node.parent) || node.parent.kind === SyntaxKind.VariableStatement)) {
-                                return getModifierOccurrences(node.kind, node.parent);
-                            }
-                    }
-                }
+    /**
+     * For lack of a better name, this function takes a throw statement and returns the
+     * nearest ancestor that is a try-block (whose try statement has a catch clause),
+     * function-block, or source file.
+     */
+    function getThrowStatementOwner(throwStatement: ThrowStatement): Node {
+        let child: Node = throwStatement;
 
-                return undefined;
-            }
+        while (child.parent) {
+            const parent = child.parent;
 
-            /**
-             * Aggregates all throw-statements within this node *without* crossing
-             * into function boundaries and try-blocks with catch-clauses.
-             */
-            function aggregateOwnedThrowStatements(node: Node): ThrowStatement[] {
-                const statementAccumulator: ThrowStatement[] = [];
-                aggregate(node);
-                return statementAccumulator;
-
-                function aggregate(node: Node): void {
-                    if (node.kind === SyntaxKind.ThrowStatement) {
-                        statementAccumulator.push(<ThrowStatement>node);
-                    }
-                    else if (node.kind === SyntaxKind.TryStatement) {
-                        const tryStatement = <TryStatement>node;
-
-                        if (tryStatement.catchClause) {
-                            aggregate(tryStatement.catchClause);
-                        }
-                        else {
-                            // Exceptions thrown within a try block lacking a catch clause
-                            // are "owned" in the current context.
-                            aggregate(tryStatement.tryBlock);
-                        }
-
-                        if (tryStatement.finallyBlock) {
-                            aggregate(tryStatement.finallyBlock);
-                        }
-                    }
-                    // Do not cross function boundaries.
-                    else if (!isFunctionLike(node)) {
-                        forEachChild(node, aggregate);
-                    }
-                }
+            if (isFunctionBlock(parent) || parent.kind === SyntaxKind.SourceFile) {
+                return parent;
             }
 
-            /**
-             * For lack of a better name, this function takes a throw statement and returns the
-             * nearest ancestor that is a try-block (whose try statement has a catch clause),
-             * function-block, or source file.
-             */
-            function getThrowStatementOwner(throwStatement: ThrowStatement): Node {
-                let child: Node = throwStatement;
-
-                while (child.parent) {
-                    const parent = child.parent;
+            // A throw-statement is only owned by a try-statement if the try-statement has
+            // a catch clause, and if the throw-statement occurs within the try block.
+            if (parent.kind === SyntaxKind.TryStatement) {
+                const tryStatement = <TryStatement>parent;
 
-                    if (isFunctionBlock(parent) || parent.kind === SyntaxKind.SourceFile) {
-                        return parent;
-                    }
+                if (tryStatement.tryBlock === child && tryStatement.catchClause) {
+                    return child;
+                }
+            }
 
-                    // A throw-statement is only owned by a try-statement if the try-statement has
-                    // a catch clause, and if the throw-statement occurs within the try block.
-                    if (parent.kind === SyntaxKind.TryStatement) {
-                        const tryStatement = <TryStatement>parent;
+            child = parent;
+        }
 
-                        if (tryStatement.tryBlock === child && tryStatement.catchClause) {
-                            return child;
-                        }
-                    }
+        return undefined;
+    }
 
-                    child = parent;
-                }
+    function aggregateAllBreakAndContinueStatements(node: Node): BreakOrContinueStatement[] {
+        const statementAccumulator: BreakOrContinueStatement[] = [];
+        aggregate(node);
+        return statementAccumulator;
 
-                return undefined;
+        function aggregate(node: Node): void {
+            if (node.kind === SyntaxKind.BreakStatement || node.kind === SyntaxKind.ContinueStatement) {
+                statementAccumulator.push(<BreakOrContinueStatement>node);
+            }
+            // Do not cross function boundaries.
+            else if (!isFunctionLike(node)) {
+                forEachChild(node, aggregate);
             }
+        }
+    }
 
-            function aggregateAllBreakAndContinueStatements(node: Node): BreakOrContinueStatement[] {
-                const statementAccumulator: BreakOrContinueStatement[] = [];
-                aggregate(node);
-                return statementAccumulator;
+    function ownsBreakOrContinueStatement(owner: Node, statement: BreakOrContinueStatement): boolean {
+        const actualOwner = getBreakOrContinueOwner(statement);
 
-                function aggregate(node: Node): void {
-                    if (node.kind === SyntaxKind.BreakStatement || node.kind === SyntaxKind.ContinueStatement) {
-                        statementAccumulator.push(<BreakOrContinueStatement>node);
+        return actualOwner && actualOwner === owner;
+    }
+
+    function getBreakOrContinueOwner(statement: BreakOrContinueStatement): Node {
+        for (let node = statement.parent; node; node = node.parent) {
+            switch (node.kind) {
+                case SyntaxKind.SwitchStatement:
+                    if (statement.kind === SyntaxKind.ContinueStatement) {
+                        continue;
                     }
-                    // Do not cross function boundaries.
-                    else if (!isFunctionLike(node)) {
-                        forEachChild(node, aggregate);
+                    // falls through
+                case SyntaxKind.ForStatement:
+                case SyntaxKind.ForInStatement:
+                case SyntaxKind.ForOfStatement:
+                case SyntaxKind.WhileStatement:
+                case SyntaxKind.DoStatement:
+                    if (!statement.label || isLabeledBy(node, statement.label.text)) {
+                        return node;
                     }
-                }
+                    break;
+                default:
+                    // Don't cross function boundaries.
+                    if (isFunctionLike(node)) {
+                        return undefined;
+                    }
+                    break;
             }
+        }
 
-            function ownsBreakOrContinueStatement(owner: Node, statement: BreakOrContinueStatement): boolean {
-                const actualOwner = getBreakOrContinueOwner(statement);
-
-                return actualOwner && actualOwner === owner;
-            }
+        return undefined;
+    }
 
-            function getBreakOrContinueOwner(statement: BreakOrContinueStatement): Node {
-                for (let node = statement.parent; node; node = node.parent) {
-                    switch (node.kind) {
-                        case SyntaxKind.SwitchStatement:
-                            if (statement.kind === SyntaxKind.ContinueStatement) {
-                                continue;
-                            }
-                        // Fall through.
-                        case SyntaxKind.ForStatement:
-                        case SyntaxKind.ForInStatement:
-                        case SyntaxKind.ForOfStatement:
-                        case SyntaxKind.WhileStatement:
-                        case SyntaxKind.DoStatement:
-                            if (!statement.label || isLabeledBy(node, statement.label.text)) {
-                                return node;
-                            }
-                            break;
-                        default:
-                            // Don't cross function boundaries.
-                            if (isFunctionLike(node)) {
-                                return undefined;
-                            }
-                            break;
-                    }
-                }
+    function getModifierOccurrences(modifier: SyntaxKind, declaration: Node): Node[] {
+        const container = declaration.parent;
 
+        // Make sure we only highlight the keyword when it makes sense to do so.
+        if (isAccessibilityModifier(modifier)) {
+            if (!(container.kind === SyntaxKind.ClassDeclaration ||
+                container.kind === SyntaxKind.ClassExpression ||
+                (declaration.kind === SyntaxKind.Parameter && hasKind(container, SyntaxKind.Constructor)))) {
+                return undefined;
+            }
+        }
+        else if (modifier === SyntaxKind.StaticKeyword) {
+            if (!(container.kind === SyntaxKind.ClassDeclaration || container.kind === SyntaxKind.ClassExpression)) {
+                return undefined;
+            }
+        }
+        else if (modifier === SyntaxKind.ExportKeyword || modifier === SyntaxKind.DeclareKeyword) {
+            if (!(container.kind === SyntaxKind.ModuleBlock || container.kind === SyntaxKind.SourceFile)) {
                 return undefined;
             }
+        }
+        else if (modifier === SyntaxKind.AbstractKeyword) {
+            if (!(container.kind === SyntaxKind.ClassDeclaration || declaration.kind === SyntaxKind.ClassDeclaration)) {
+                return undefined;
+            }
+        }
+        else {
+            // unsupported modifier
+            return undefined;
+        }
 
-            function getModifierOccurrences(modifier: SyntaxKind, declaration: Node): HighlightSpan[] {
-                const container = declaration.parent;
+        const keywords: Node[] = [];
+        const modifierFlag: ModifierFlags = getFlagFromModifier(modifier);
 
-                // Make sure we only highlight the keyword when it makes sense to do so.
-                if (isAccessibilityModifier(modifier)) {
-                    if (!(container.kind === SyntaxKind.ClassDeclaration ||
-                        container.kind === SyntaxKind.ClassExpression ||
-                        (declaration.kind === SyntaxKind.Parameter && hasKind(container, SyntaxKind.Constructor)))) {
-                        return undefined;
-                    }
-                }
-                else if (modifier === SyntaxKind.StaticKeyword) {
-                    if (!(container.kind === SyntaxKind.ClassDeclaration || container.kind === SyntaxKind.ClassExpression)) {
-                        return undefined;
-                    }
-                }
-                else if (modifier === SyntaxKind.ExportKeyword || modifier === SyntaxKind.DeclareKeyword) {
-                    if (!(container.kind === SyntaxKind.ModuleBlock || container.kind === SyntaxKind.SourceFile)) {
-                        return undefined;
-                    }
-                }
-                else if (modifier === SyntaxKind.AbstractKeyword) {
-                    if (!(container.kind === SyntaxKind.ClassDeclaration || declaration.kind === SyntaxKind.ClassDeclaration)) {
-                        return undefined;
-                    }
+        let nodes: Node[];
+        switch (container.kind) {
+            case SyntaxKind.ModuleBlock:
+            case SyntaxKind.SourceFile:
+                // Container is either a class declaration or the declaration is a classDeclaration
+                if (modifierFlag & ModifierFlags.Abstract) {
+                    nodes = (<Node[]>(<ClassDeclaration>declaration).members).concat(declaration);
                 }
                 else {
-                    // unsupported modifier
-                    return undefined;
-                }
-
-                const keywords: Node[] = [];
-                const modifierFlag: ModifierFlags = getFlagFromModifier(modifier);
-
-                let nodes: Node[];
-                switch (container.kind) {
-                    case SyntaxKind.ModuleBlock:
-                    case SyntaxKind.SourceFile:
-                        // Container is either a class declaration or the declaration is a classDeclaration
-                        if (modifierFlag & ModifierFlags.Abstract) {
-                            nodes = (<Node[]>(<ClassDeclaration>declaration).members).concat(declaration);
-                        }
-                        else {
-                            nodes = (<Block>container).statements;
-                        }
-                        break;
-                    case SyntaxKind.Constructor:
-                        nodes = (<Node[]>(<ConstructorDeclaration>container).parameters).concat(
-                            (<ClassDeclaration>container.parent).members);
-                        break;
-                    case SyntaxKind.ClassDeclaration:
-                    case SyntaxKind.ClassExpression:
-                        nodes = (<ClassLikeDeclaration>container).members;
-
-                        // If we're an accessibility modifier, we're in an instance member and should search
-                        // the constructor's parameter list for instance members as well.
-                        if (modifierFlag & ModifierFlags.AccessibilityModifier) {
-                            const constructor = forEach((<ClassLikeDeclaration>container).members, member => {
-                                return member.kind === SyntaxKind.Constructor && <ConstructorDeclaration>member;
-                            });
-
-                            if (constructor) {
-                                nodes = nodes.concat(constructor.parameters);
-                            }
-                        }
-                        else if (modifierFlag & ModifierFlags.Abstract) {
-                            nodes = nodes.concat(container);
-                        }
-                        break;
-                    default:
-                        Debug.fail("Invalid container kind.");
+                    nodes = (<Block>container).statements;
                 }
+                break;
+            case SyntaxKind.Constructor:
+                nodes = (<Node[]>(<ConstructorDeclaration>container).parameters).concat(
+                    (<ClassDeclaration>container.parent).members);
+                break;
+            case SyntaxKind.ClassDeclaration:
+            case SyntaxKind.ClassExpression:
+                nodes = (<ClassLikeDeclaration>container).members;
+
+                // If we're an accessibility modifier, we're in an instance member and should search
+                // the constructor's parameter list for instance members as well.
+                if (modifierFlag & ModifierFlags.AccessibilityModifier) {
+                    const constructor = forEach((<ClassLikeDeclaration>container).members, member => {
+                        return member.kind === SyntaxKind.Constructor && <ConstructorDeclaration>member;
+                    });
 
-                forEach(nodes, node => {
-                    if (getModifierFlags(node) & modifierFlag) {
-                        forEach(node.modifiers, child => pushKeywordIf(keywords, child, modifier));
-                    }
-                });
-
-                return map(keywords, getHighlightSpanForNode);
-
-                function getFlagFromModifier(modifier: SyntaxKind) {
-                    switch (modifier) {
-                        case SyntaxKind.PublicKeyword:
-                            return ModifierFlags.Public;
-                        case SyntaxKind.PrivateKeyword:
-                            return ModifierFlags.Private;
-                        case SyntaxKind.ProtectedKeyword:
-                            return ModifierFlags.Protected;
-                        case SyntaxKind.StaticKeyword:
-                            return ModifierFlags.Static;
-                        case SyntaxKind.ExportKeyword:
-                            return ModifierFlags.Export;
-                        case SyntaxKind.DeclareKeyword:
-                            return ModifierFlags.Ambient;
-                        case SyntaxKind.AbstractKeyword:
-                            return ModifierFlags.Abstract;
-                        default:
-                            Debug.fail();
+                    if (constructor) {
+                        nodes = nodes.concat(constructor.parameters);
                     }
                 }
-            }
-
-            function pushKeywordIf(keywordList: Node[], token: Node, ...expected: SyntaxKind[]): boolean {
-                if (token && contains(expected, token.kind)) {
-                    keywordList.push(token);
-                    return true;
+                else if (modifierFlag & ModifierFlags.Abstract) {
+                    nodes = nodes.concat(container);
                 }
+                break;
+            default:
+                Debug.fail("Invalid container kind.");
+        }
 
-                return false;
+        forEach(nodes, node => {
+            if (getModifierFlags(node) & modifierFlag) {
+                forEach(node.modifiers, child => pushKeywordIf(keywords, child, modifier));
             }
+        });
+
+        return keywords;
+
+        function getFlagFromModifier(modifier: SyntaxKind) {
+            switch (modifier) {
+                case SyntaxKind.PublicKeyword:
+                    return ModifierFlags.Public;
+                case SyntaxKind.PrivateKeyword:
+                    return ModifierFlags.Private;
+                case SyntaxKind.ProtectedKeyword:
+                    return ModifierFlags.Protected;
+                case SyntaxKind.StaticKeyword:
+                    return ModifierFlags.Static;
+                case SyntaxKind.ExportKeyword:
+                    return ModifierFlags.Export;
+                case SyntaxKind.DeclareKeyword:
+                    return ModifierFlags.Ambient;
+                case SyntaxKind.AbstractKeyword:
+                    return ModifierFlags.Abstract;
+                default:
+                    Debug.fail();
+            }
+        }
+    }
 
-            function getGetAndSetOccurrences(accessorDeclaration: AccessorDeclaration): HighlightSpan[] {
-                const keywords: Node[] = [];
+    function pushKeywordIf(keywordList: Node[], token: Node, ...expected: SyntaxKind[]): boolean {
+        if (token && contains(expected, token.kind)) {
+            keywordList.push(token);
+            return true;
+        }
 
-                tryPushAccessorKeyword(accessorDeclaration.symbol, SyntaxKind.GetAccessor);
-                tryPushAccessorKeyword(accessorDeclaration.symbol, SyntaxKind.SetAccessor);
+        return false;
+    }
 
-                return map(keywords, getHighlightSpanForNode);
+    function getGetAndSetOccurrences(accessorDeclaration: AccessorDeclaration): Node[] {
+        const keywords: Node[] = [];
 
-                function tryPushAccessorKeyword(accessorSymbol: Symbol, accessorKind: SyntaxKind): void {
-                    const accessor = getDeclarationOfKind(accessorSymbol, accessorKind);
+        tryPushAccessorKeyword(accessorDeclaration.symbol, SyntaxKind.GetAccessor);
+        tryPushAccessorKeyword(accessorDeclaration.symbol, SyntaxKind.SetAccessor);
 
-                    if (accessor) {
-                        forEach(accessor.getChildren(), child => pushKeywordIf(keywords, child, SyntaxKind.GetKeyword, SyntaxKind.SetKeyword));
-                    }
-                }
+        return keywords;
+
+        function tryPushAccessorKeyword(accessorSymbol: Symbol, accessorKind: SyntaxKind): void {
+            const accessor = getDeclarationOfKind(accessorSymbol, accessorKind);
+
+            if (accessor) {
+                forEach(accessor.getChildren(), child => pushKeywordIf(keywords, child, SyntaxKind.GetKeyword, SyntaxKind.SetKeyword));
             }
+        }
+    }
 
-            function getConstructorOccurrences(constructorDeclaration: ConstructorDeclaration): HighlightSpan[] {
-                const declarations = constructorDeclaration.symbol.getDeclarations();
+    function getConstructorOccurrences(constructorDeclaration: ConstructorDeclaration): Node[] {
+        const declarations = constructorDeclaration.symbol.getDeclarations();
 
-                const keywords: Node[] = [];
+        const keywords: Node[] = [];
 
-                forEach(declarations, declaration => {
-                    forEach(declaration.getChildren(), token => {
-                        return pushKeywordIf(keywords, token, SyntaxKind.ConstructorKeyword);
-                    });
-                });
+        forEach(declarations, declaration => {
+            forEach(declaration.getChildren(), token => {
+                return pushKeywordIf(keywords, token, SyntaxKind.ConstructorKeyword);
+            });
+        });
 
-                return map(keywords, getHighlightSpanForNode);
-            }
+        return keywords;
+    }
 
-            function getLoopBreakContinueOccurrences(loopNode: IterationStatement): HighlightSpan[] {
-                const keywords: Node[] = [];
+    function getLoopBreakContinueOccurrences(loopNode: IterationStatement): Node[] {
+        const keywords: Node[] = [];
 
-                if (pushKeywordIf(keywords, loopNode.getFirstToken(), SyntaxKind.ForKeyword, SyntaxKind.WhileKeyword, SyntaxKind.DoKeyword)) {
-                    // If we succeeded and got a do-while loop, then start looking for a 'while' keyword.
-                    if (loopNode.kind === SyntaxKind.DoStatement) {
-                        const loopTokens = loopNode.getChildren();
+        if (pushKeywordIf(keywords, loopNode.getFirstToken(), SyntaxKind.ForKeyword, SyntaxKind.WhileKeyword, SyntaxKind.DoKeyword)) {
+            // If we succeeded and got a do-while loop, then start looking for a 'while' keyword.
+            if (loopNode.kind === SyntaxKind.DoStatement) {
+                const loopTokens = loopNode.getChildren();
 
-                        for (let i = loopTokens.length - 1; i >= 0; i--) {
-                            if (pushKeywordIf(keywords, loopTokens[i], SyntaxKind.WhileKeyword)) {
-                                break;
-                            }
-                        }
+                for (let i = loopTokens.length - 1; i >= 0; i--) {
+                    if (pushKeywordIf(keywords, loopTokens[i], SyntaxKind.WhileKeyword)) {
+                        break;
                     }
                 }
+            }
+        }
 
-                const breaksAndContinues = aggregateAllBreakAndContinueStatements(loopNode.statement);
+        const breaksAndContinues = aggregateAllBreakAndContinueStatements(loopNode.statement);
 
-                forEach(breaksAndContinues, statement => {
-                    if (ownsBreakOrContinueStatement(loopNode, statement)) {
-                        pushKeywordIf(keywords, statement.getFirstToken(), SyntaxKind.BreakKeyword, SyntaxKind.ContinueKeyword);
-                    }
-                });
-
-                return map(keywords, getHighlightSpanForNode);
+        forEach(breaksAndContinues, statement => {
+            if (ownsBreakOrContinueStatement(loopNode, statement)) {
+                pushKeywordIf(keywords, statement.getFirstToken(), SyntaxKind.BreakKeyword, SyntaxKind.ContinueKeyword);
             }
+        });
 
-            function getBreakOrContinueStatementOccurrences(breakOrContinueStatement: BreakOrContinueStatement): HighlightSpan[] {
-                const owner = getBreakOrContinueOwner(breakOrContinueStatement);
+        return keywords;
+    }
 
-                if (owner) {
-                    switch (owner.kind) {
-                        case SyntaxKind.ForStatement:
-                        case SyntaxKind.ForInStatement:
-                        case SyntaxKind.ForOfStatement:
-                        case SyntaxKind.DoStatement:
-                        case SyntaxKind.WhileStatement:
-                            return getLoopBreakContinueOccurrences(<IterationStatement>owner);
-                        case SyntaxKind.SwitchStatement:
-                            return getSwitchCaseDefaultOccurrences(<SwitchStatement>owner);
+    function getBreakOrContinueStatementOccurrences(breakOrContinueStatement: BreakOrContinueStatement): Node[] {
+        const owner = getBreakOrContinueOwner(breakOrContinueStatement);
 
-                    }
-                }
+        if (owner) {
+            switch (owner.kind) {
+                case SyntaxKind.ForStatement:
+                case SyntaxKind.ForInStatement:
+                case SyntaxKind.ForOfStatement:
+                case SyntaxKind.DoStatement:
+                case SyntaxKind.WhileStatement:
+                    return getLoopBreakContinueOccurrences(<IterationStatement>owner);
+                case SyntaxKind.SwitchStatement:
+                    return getSwitchCaseDefaultOccurrences(<SwitchStatement>owner);
 
-                return undefined;
             }
+        }
 
-            function getSwitchCaseDefaultOccurrences(switchStatement: SwitchStatement): HighlightSpan[] {
-                const keywords: Node[] = [];
+        return undefined;
+    }
 
-                pushKeywordIf(keywords, switchStatement.getFirstToken(), SyntaxKind.SwitchKeyword);
+    function getSwitchCaseDefaultOccurrences(switchStatement: SwitchStatement): Node[] {
+        const keywords: Node[] = [];
 
-                // Go through each clause in the switch statement, collecting the 'case'/'default' keywords.
-                forEach(switchStatement.caseBlock.clauses, clause => {
-                    pushKeywordIf(keywords, clause.getFirstToken(), SyntaxKind.CaseKeyword, SyntaxKind.DefaultKeyword);
+        pushKeywordIf(keywords, switchStatement.getFirstToken(), SyntaxKind.SwitchKeyword);
 
-                    const breaksAndContinues = aggregateAllBreakAndContinueStatements(clause);
+        // Go through each clause in the switch statement, collecting the 'case'/'default' keywords.
+        forEach(switchStatement.caseBlock.clauses, clause => {
+            pushKeywordIf(keywords, clause.getFirstToken(), SyntaxKind.CaseKeyword, SyntaxKind.DefaultKeyword);
 
-                    forEach(breaksAndContinues, statement => {
-                        if (ownsBreakOrContinueStatement(switchStatement, statement)) {
-                            pushKeywordIf(keywords, statement.getFirstToken(), SyntaxKind.BreakKeyword);
-                        }
-                    });
-                });
+            const breaksAndContinues = aggregateAllBreakAndContinueStatements(clause);
 
-                return map(keywords, getHighlightSpanForNode);
-            }
+            forEach(breaksAndContinues, statement => {
+                if (ownsBreakOrContinueStatement(switchStatement, statement)) {
+                    pushKeywordIf(keywords, statement.getFirstToken(), SyntaxKind.BreakKeyword);
+                }
+            });
+        });
 
-            function getTryCatchFinallyOccurrences(tryStatement: TryStatement): HighlightSpan[] {
-                const keywords: Node[] = [];
+        return keywords;
+    }
 
-                pushKeywordIf(keywords, tryStatement.getFirstToken(), SyntaxKind.TryKeyword);
+    function getTryCatchFinallyOccurrences(tryStatement: TryStatement, sourceFile: SourceFile): Node[] {
+        const keywords: Node[] = [];
 
-                if (tryStatement.catchClause) {
-                    pushKeywordIf(keywords, tryStatement.catchClause.getFirstToken(), SyntaxKind.CatchKeyword);
-                }
+        pushKeywordIf(keywords, tryStatement.getFirstToken(), SyntaxKind.TryKeyword);
 
-                if (tryStatement.finallyBlock) {
-                    const finallyKeyword = findChildOfKind(tryStatement, SyntaxKind.FinallyKeyword, sourceFile);
-                    pushKeywordIf(keywords, finallyKeyword, SyntaxKind.FinallyKeyword);
-                }
+        if (tryStatement.catchClause) {
+            pushKeywordIf(keywords, tryStatement.catchClause.getFirstToken(), SyntaxKind.CatchKeyword);
+        }
 
-                return map(keywords, getHighlightSpanForNode);
-            }
+        if (tryStatement.finallyBlock) {
+            const finallyKeyword = findChildOfKind(tryStatement, SyntaxKind.FinallyKeyword, sourceFile);
+            pushKeywordIf(keywords, finallyKeyword, SyntaxKind.FinallyKeyword);
+        }
 
-            function getThrowOccurrences(throwStatement: ThrowStatement): HighlightSpan[] {
-                const owner = getThrowStatementOwner(throwStatement);
+        return keywords;
+    }
 
-                if (!owner) {
-                    return undefined;
-                }
+    function getThrowOccurrences(throwStatement: ThrowStatement): Node[] {
+        const owner = getThrowStatementOwner(throwStatement);
 
-                const keywords: Node[] = [];
+        if (!owner) {
+            return undefined;
+        }
 
-                forEach(aggregateOwnedThrowStatements(owner), throwStatement => {
-                    pushKeywordIf(keywords, throwStatement.getFirstToken(), SyntaxKind.ThrowKeyword);
-                });
+        const keywords: Node[] = [];
 
-                // If the "owner" is a function, then we equate 'return' and 'throw' statements in their
-                // ability to "jump out" of the function, and include occurrences for both.
-                if (isFunctionBlock(owner)) {
-                    forEachReturnStatement(<Block>owner, returnStatement => {
-                        pushKeywordIf(keywords, returnStatement.getFirstToken(), SyntaxKind.ReturnKeyword);
-                    });
-                }
+        forEach(aggregateOwnedThrowStatements(owner), throwStatement => {
+            pushKeywordIf(keywords, throwStatement.getFirstToken(), SyntaxKind.ThrowKeyword);
+        });
 
-                return map(keywords, getHighlightSpanForNode);
-            }
+        // If the "owner" is a function, then we equate 'return' and 'throw' statements in their
+        // ability to "jump out" of the function, and include occurrences for both.
+        if (isFunctionBlock(owner)) {
+            forEachReturnStatement(<Block>owner, returnStatement => {
+                pushKeywordIf(keywords, returnStatement.getFirstToken(), SyntaxKind.ReturnKeyword);
+            });
+        }
 
-            function getReturnOccurrences(returnStatement: ReturnStatement): HighlightSpan[] {
-                const func = <FunctionLikeDeclaration>getContainingFunction(returnStatement);
+        return keywords;
+    }
 
-                // If we didn't find a containing function with a block body, bail out.
-                if (!(func && hasKind(func.body, SyntaxKind.Block))) {
-                    return undefined;
-                }
+    function getReturnOccurrences(returnStatement: ReturnStatement): Node[] {
+        const func = <FunctionLikeDeclaration>getContainingFunction(returnStatement);
 
-                const keywords: Node[] = [];
-                forEachReturnStatement(<Block>func.body, returnStatement => {
-                    pushKeywordIf(keywords, returnStatement.getFirstToken(), SyntaxKind.ReturnKeyword);
-                });
+        // If we didn't find a containing function with a block body, bail out.
+        if (!(func && hasKind(func.body, SyntaxKind.Block))) {
+            return undefined;
+        }
 
-                // Include 'throw' statements that do not occur within a try block.
-                forEach(aggregateOwnedThrowStatements(func.body), throwStatement => {
-                    pushKeywordIf(keywords, throwStatement.getFirstToken(), SyntaxKind.ThrowKeyword);
-                });
+        const keywords: Node[] = [];
+        forEachReturnStatement(<Block>func.body, returnStatement => {
+            pushKeywordIf(keywords, returnStatement.getFirstToken(), SyntaxKind.ReturnKeyword);
+        });
 
-                return map(keywords, getHighlightSpanForNode);
-            }
+        // Include 'throw' statements that do not occur within a try block.
+        forEach(aggregateOwnedThrowStatements(func.body), throwStatement => {
+            pushKeywordIf(keywords, throwStatement.getFirstToken(), SyntaxKind.ThrowKeyword);
+        });
 
-            function getIfElseOccurrences(ifStatement: IfStatement): HighlightSpan[] {
-                const keywords: Node[] = [];
+        return keywords;
+    }
+
+    function getIfElseOccurrences(ifStatement: IfStatement, sourceFile: SourceFile): HighlightSpan[] {
+        const keywords: Node[] = [];
 
-                // Traverse upwards through all parent if-statements linked by their else-branches.
-                while (hasKind(ifStatement.parent, SyntaxKind.IfStatement) && (<IfStatement>ifStatement.parent).elseStatement === ifStatement) {
-                    ifStatement = <IfStatement>ifStatement.parent;
+        // Traverse upwards through all parent if-statements linked by their else-branches.
+        while (hasKind(ifStatement.parent, SyntaxKind.IfStatement) && (<IfStatement>ifStatement.parent).elseStatement === ifStatement) {
+            ifStatement = <IfStatement>ifStatement.parent;
+        }
+
+        // Now traverse back down through the else branches, aggregating if/else keywords of if-statements.
+        while (ifStatement) {
+            const children = ifStatement.getChildren();
+            pushKeywordIf(keywords, children[0], SyntaxKind.IfKeyword);
+
+            // Generally the 'else' keyword is second-to-last, so we traverse backwards.
+            for (let i = children.length - 1; i >= 0; i--) {
+                if (pushKeywordIf(keywords, children[i], SyntaxKind.ElseKeyword)) {
+                    break;
                 }
+            }
 
-                // Now traverse back down through the else branches, aggregating if/else keywords of if-statements.
-                while (ifStatement) {
-                    const children = ifStatement.getChildren();
-                    pushKeywordIf(keywords, children[0], SyntaxKind.IfKeyword);
+            if (!hasKind(ifStatement.elseStatement, SyntaxKind.IfStatement)) {
+                break;
+            }
 
-                    // Generally the 'else' keyword is second-to-last, so we traverse backwards.
-                    for (let i = children.length - 1; i >= 0; i--) {
-                        if (pushKeywordIf(keywords, children[i], SyntaxKind.ElseKeyword)) {
-                            break;
-                        }
-                    }
+            ifStatement = <IfStatement>ifStatement.elseStatement;
+        }
 
-                    if (!hasKind(ifStatement.elseStatement, SyntaxKind.IfStatement)) {
-                        break;
-                    }
+        const result: HighlightSpan[] = [];
 
-                    ifStatement = <IfStatement>ifStatement.elseStatement;
-                }
+        // We'd like to highlight else/ifs together if they are only separated by whitespace
+        // (i.e. the keywords are separated by no comments, no newlines).
+        for (let i = 0; i < keywords.length; i++) {
+            if (keywords[i].kind === SyntaxKind.ElseKeyword && i < keywords.length - 1) {
+                const elseKeyword = keywords[i];
+                const ifKeyword = keywords[i + 1]; // this *should* always be an 'if' keyword.
 
-                const result: HighlightSpan[] = [];
-
-                // We'd like to highlight else/ifs together if they are only separated by whitespace
-                // (i.e. the keywords are separated by no comments, no newlines).
-                for (let i = 0; i < keywords.length; i++) {
-                    if (keywords[i].kind === SyntaxKind.ElseKeyword && i < keywords.length - 1) {
-                        const elseKeyword = keywords[i];
-                        const ifKeyword = keywords[i + 1]; // this *should* always be an 'if' keyword.
-
-                        let shouldCombindElseAndIf = true;
-
-                        // Avoid recalculating getStart() by iterating backwards.
-                        for (let j = ifKeyword.getStart() - 1; j >= elseKeyword.end; j--) {
-                            if (!isWhiteSpaceSingleLine(sourceFile.text.charCodeAt(j))) {
-                                shouldCombindElseAndIf = false;
-                                break;
-                            }
-                        }
-
-                        if (shouldCombindElseAndIf) {
-                            result.push({
-                                fileName: fileName,
-                                textSpan: createTextSpanFromBounds(elseKeyword.getStart(), ifKeyword.end),
-                                kind: HighlightSpanKind.reference
-                            });
-                            i++; // skip the next keyword
-                            continue;
-                        }
-                    }
+                let shouldCombindElseAndIf = true;
 
-                    // Ordinary case: just highlight the keyword.
-                    result.push(getHighlightSpanForNode(keywords[i]));
+                // Avoid recalculating getStart() by iterating backwards.
+                for (let j = ifKeyword.getStart() - 1; j >= elseKeyword.end; j--) {
+                    if (!isWhiteSpaceSingleLine(sourceFile.text.charCodeAt(j))) {
+                        shouldCombindElseAndIf = false;
+                        break;
+                    }
                 }
 
-                return result;
+                if (shouldCombindElseAndIf) {
+                    result.push({
+                        fileName: sourceFile.fileName,
+                        textSpan: createTextSpanFromBounds(elseKeyword.getStart(), ifKeyword.end),
+                        kind: HighlightSpanKind.reference
+                    });
+                    i++; // skip the next keyword
+                    continue;
+                }
             }
+
+            // Ordinary case: just highlight the keyword.
+            result.push(getHighlightSpanForNode(keywords[i], sourceFile));
         }
+
+        return result;
     }
 
     /**
diff --git a/src/services/documentRegistry.ts b/src/services/documentRegistry.ts
index d73e4d3..fa1b50a 100644
--- a/src/services/documentRegistry.ts
+++ b/src/services/documentRegistry.ts
@@ -1,34 +1,34 @@
 namespace ts {
     /**
-      * The document registry represents a store of SourceFile objects that can be shared between
-      * multiple LanguageService instances. A LanguageService instance holds on the SourceFile (AST)
-      * of files in the context.
-      * SourceFile objects account for most of the memory usage by the language service. Sharing
-      * the same DocumentRegistry instance between different instances of LanguageService allow
-      * for more efficient memory utilization since all projects will share at least the library
-      * file (lib.d.ts).
-      *
-      * A more advanced use of the document registry is to serialize sourceFile objects to disk
-      * and re-hydrate them when needed.
-      *
-      * To create a default DocumentRegistry, use createDocumentRegistry to create one, and pass it
-      * to all subsequent createLanguageService calls.
-      */
+     * The document registry represents a store of SourceFile objects that can be shared between
+     * multiple LanguageService instances. A LanguageService instance holds on the SourceFile (AST)
+     * of files in the context.
+     * SourceFile objects account for most of the memory usage by the language service. Sharing
+     * the same DocumentRegistry instance between different instances of LanguageService allow
+     * for more efficient memory utilization since all projects will share at least the library
+     * file (lib.d.ts).
+     *
+     * A more advanced use of the document registry is to serialize sourceFile objects to disk
+     * and re-hydrate them when needed.
+     *
+     * To create a default DocumentRegistry, use createDocumentRegistry to create one, and pass it
+     * to all subsequent createLanguageService calls.
+     */
     export interface DocumentRegistry {
         /**
-          * Request a stored SourceFile with a given fileName and compilationSettings.
-          * The first call to acquire will call createLanguageServiceSourceFile to generate
-          * the SourceFile if was not found in the registry.
-          *
-          * @param fileName The name of the file requested
-          * @param compilationSettings Some compilation settings like target affects the
-          * shape of a the resulting SourceFile. This allows the DocumentRegistry to store
-          * multiple copies of the same file for different compilation settings.
-          * @parm scriptSnapshot Text of the file. Only used if the file was not found
-          * in the registry and a new one was created.
-          * @parm version Current version of the file. Only used if the file was not found
-          * in the registry and a new one was created.
-          */
+         * Request a stored SourceFile with a given fileName and compilationSettings.
+         * The first call to acquire will call createLanguageServiceSourceFile to generate
+         * the SourceFile if was not found in the registry.
+         *
+         * @param fileName The name of the file requested
+         * @param compilationSettings Some compilation settings like target affects the
+         * shape of a the resulting SourceFile. This allows the DocumentRegistry to store
+         * multiple copies of the same file for different compilation settings.
+         * @parm scriptSnapshot Text of the file. Only used if the file was not found
+         * in the registry and a new one was created.
+         * @parm version Current version of the file. Only used if the file was not found
+         * in the registry and a new one was created.
+         */
         acquireDocument(
             fileName: string,
             compilationSettings: CompilerOptions,
@@ -46,17 +46,17 @@ namespace ts {
             scriptKind?: ScriptKind): SourceFile;
 
         /**
-          * Request an updated version of an already existing SourceFile with a given fileName
-          * and compilationSettings. The update will in-turn call updateLanguageServiceSourceFile
-          * to get an updated SourceFile.
-          *
-          * @param fileName The name of the file requested
-          * @param compilationSettings Some compilation settings like target affects the
-          * shape of a the resulting SourceFile. This allows the DocumentRegistry to store
-          * multiple copies of the same file for different compilation settings.
-          * @param scriptSnapshot Text of the file.
-          * @param version Current version of the file.
-          */
+         * Request an updated version of an already existing SourceFile with a given fileName
+         * and compilationSettings. The update will in-turn call updateLanguageServiceSourceFile
+         * to get an updated SourceFile.
+         *
+         * @param fileName The name of the file requested
+         * @param compilationSettings Some compilation settings like target affects the
+         * shape of a the resulting SourceFile. This allows the DocumentRegistry to store
+         * multiple copies of the same file for different compilation settings.
+         * @param scriptSnapshot Text of the file.
+         * @param version Current version of the file.
+         */
         updateDocument(
             fileName: string,
             compilationSettings: CompilerOptions,
@@ -75,14 +75,14 @@ namespace ts {
 
         getKeyForCompilationSettings(settings: CompilerOptions): DocumentRegistryBucketKey;
         /**
-          * Informs the DocumentRegistry that a file is not needed any longer.
-          *
-          * Note: It is not allowed to call release on a SourceFile that was not acquired from
-          * this registry originally.
-          *
-          * @param fileName The name of the file to be released
-          * @param compilationSettings The compilation settings used to acquire the file
-          */
+         * Informs the DocumentRegistry that a file is not needed any longer.
+         *
+         * Note: It is not allowed to call release on a SourceFile that was not acquired from
+         * this registry originally.
+         *
+         * @param fileName The name of the file to be released
+         * @param compilationSettings The compilation settings used to acquire the file
+         */
         releaseDocument(fileName: string, compilationSettings: CompilerOptions): void;
 
         releaseDocumentWithKey(path: Path, key: DocumentRegistryBucketKey): void;
@@ -113,16 +113,16 @@ namespace ts {
         }
 
         function getBucketForCompilationSettings(key: DocumentRegistryBucketKey, createIfMissing: boolean): FileMap<DocumentRegistryEntry> {
-            let bucket = buckets[key];
+            let bucket = buckets.get(key);
             if (!bucket && createIfMissing) {
-                buckets[key] = bucket = createFileMap<DocumentRegistryEntry>();
+                buckets.set(key, bucket = createFileMap<DocumentRegistryEntry>());
             }
             return bucket;
         }
 
         function reportStats() {
-            const bucketInfoArray = Object.keys(buckets).filter(name => name && name.charAt(0) === "_").map(name => {
-                const entries = buckets[name];
+            const bucketInfoArray = arrayFrom(buckets.keys()).filter(name => name && name.charAt(0) === "_").map(name => {
+                const entries = buckets.get(name);
                 const sourceFiles: { name: string; refCount: number; references: string[]; }[] = [];
                 entries.forEachValue((key, entry) => {
                     sourceFiles.push({
@@ -214,7 +214,7 @@ namespace ts {
         }
 
         function releaseDocumentWithKey(path: Path, key: DocumentRegistryBucketKey): void {
-            const bucket = getBucketForCompilationSettings(key, /*createIfMissing*/false);
+            const bucket = getBucketForCompilationSettings(key, /*createIfMissing*/ false);
             Debug.assert(bucket !== undefined);
 
             const entry = bucket.get(path);
diff --git a/src/services/findAllReferences.ts b/src/services/findAllReferences.ts
index dcda3e4..192895c 100644
--- a/src/services/findAllReferences.ts
+++ b/src/services/findAllReferences.ts
@@ -1,1270 +1,1632 @@
+/// <reference path="./importTracker.ts" />
+
 /* @internal */
 namespace ts.FindAllReferences {
-    export function findReferencedSymbols(typeChecker: TypeChecker, cancellationToken: CancellationToken, sourceFiles: SourceFile[], sourceFile: SourceFile, position: number, findInStrings: boolean, findInComments: boolean): ReferencedSymbol[] {
-        const node = getTouchingPropertyName(sourceFile, position, /*includeJsDocComment*/ true);
-        if (node === sourceFile) {
+    export interface SymbolAndEntries {
+        definition: Definition | undefined;
+        references: Entry[];
+    }
+
+    export type Definition =
+        | { type: "symbol"; symbol: Symbol; node: Node }
+        | { type: "label"; node: Identifier }
+        | { type: "keyword"; node: ts.Node }
+        | { type: "this"; node: ts.Node }
+        | { type: "string"; node: ts.StringLiteral };
+
+    export type Entry = NodeEntry | SpanEntry;
+    export interface NodeEntry {
+        type: "node";
+        node: Node;
+        isInString?: true;
+    }
+    export interface SpanEntry {
+        type: "span";
+        fileName: string;
+        textSpan: TextSpan;
+    }
+    export function nodeEntry(node: ts.Node, isInString?: true): NodeEntry {
+        return { type: "node", node, isInString };
+    }
+
+    export interface Options {
+        readonly findInStrings?: boolean;
+        readonly findInComments?: boolean;
+        /**
+         * True if we are renaming the symbol.
+         * If so, we will find fewer references -- if it is referenced by several different names, we sill only find references for the original name.
+         */
+        readonly isForRename?: boolean;
+        /** True if we are searching for implementations. We will have a different method of adding references if so. */
+        readonly implementations?: boolean;
+    }
+
+    export function findReferencedSymbols(program: Program, cancellationToken: CancellationToken, sourceFiles: SourceFile[], sourceFile: SourceFile, position: number): ReferencedSymbol[] | undefined {
+        const referencedSymbols = findAllReferencedSymbols(program, cancellationToken, sourceFiles, sourceFile, position);
+
+        if (!referencedSymbols || !referencedSymbols.length) {
             return undefined;
         }
 
-        switch (node.kind) {
-            case SyntaxKind.NumericLiteral:
-                if (!isLiteralNameOfPropertyDeclarationOrIndexAccess(node)) {
-                    break;
-                }
-                // Fallthrough
-            case SyntaxKind.Identifier:
-            case SyntaxKind.ThisKeyword:
-            // case SyntaxKind.SuperKeyword: TODO:GH#9268
-            case SyntaxKind.ConstructorKeyword:
-            case SyntaxKind.StringLiteral:
-                return getReferencedSymbolsForNode(typeChecker, cancellationToken, node, sourceFiles, findInStrings, findInComments, /*implementations*/false);
+        const out: ReferencedSymbol[] = [];
+        const checker = program.getTypeChecker();
+        for (const { definition, references } of referencedSymbols) {
+            // Only include referenced symbols that have a valid definition.
+            if (definition) {
+                out.push({ definition: definitionToReferencedSymbolDefinitionInfo(definition, checker), references: references.map(toReferenceEntry) });
+            }
         }
-        return undefined;
+
+        return out;
+    }
+
+    export function getImplementationsAtPosition(program: Program, cancellationToken: CancellationToken, sourceFiles: SourceFile[], sourceFile: SourceFile, position: number): ImplementationLocation[] {
+        // A node in a JSDoc comment can't have an implementation anyway.
+        const node = getTouchingPropertyName(sourceFile, position, /*includeJsDocComment*/ false);
+        const referenceEntries = getImplementationReferenceEntries(program, cancellationToken, sourceFiles, node);
+        const checker = program.getTypeChecker();
+        return map(referenceEntries, entry => toImplementationLocation(entry, checker));
     }
 
-    export function getReferencedSymbolsForNode(typeChecker: TypeChecker, cancellationToken: CancellationToken, node: Node, sourceFiles: SourceFile[], findInStrings: boolean, findInComments: boolean, implementations: boolean): ReferencedSymbol[] {
-        if (!implementations) {
-            // Labels
-            if (isLabelName(node)) {
-                if (isJumpStatementTarget(node)) {
-                    const labelDefinition = getTargetLabel((<BreakOrContinueStatement>node.parent), (<Identifier>node).text);
-                    // if we have a label definition, look within its statement for references, if not, then
-                    // the label is undefined and we have no results..
-                    return labelDefinition ? getLabelReferencesInNode(labelDefinition.parent, labelDefinition) : undefined;
+    function getImplementationReferenceEntries(program: Program, cancellationToken: CancellationToken, sourceFiles: SourceFile[], node: Node): Entry[] | undefined {
+        if (node.kind === SyntaxKind.SourceFile) {
+            return undefined;
+        }
+
+        const checker = program.getTypeChecker();
+        // If invoked directly on a shorthand property assignment, then return
+        // the declaration of the symbol being assigned (not the symbol being assigned to).
+        if (node.parent.kind === SyntaxKind.ShorthandPropertyAssignment) {
+            const result: NodeEntry[] = [];
+            Core.getReferenceEntriesForShorthandPropertyAssignment(node, checker, node => result.push(nodeEntry(node)));
+            return result;
+        }
+        else if (node.kind === SyntaxKind.SuperKeyword || isSuperProperty(node.parent)) {
+            // References to and accesses on the super keyword only have one possible implementation, so no
+            // need to "Find all References"
+            const symbol = checker.getSymbolAtLocation(node);
+            return symbol.valueDeclaration && [nodeEntry(symbol.valueDeclaration)];
+        }
+        else {
+            // Perform "Find all References" and retrieve only those that are implementations
+            return getReferenceEntriesForNode(node, program, sourceFiles, cancellationToken, { implementations: true });
+        }
+    }
+
+    export function findReferencedEntries(program: Program, cancellationToken: CancellationToken, sourceFiles: SourceFile[], sourceFile: SourceFile, position: number, options?: Options): ReferenceEntry[] | undefined {
+        const x = flattenEntries(findAllReferencedSymbols(program, cancellationToken, sourceFiles, sourceFile, position, options));
+        return map(x, toReferenceEntry);
+    }
+
+    export function getReferenceEntriesForNode(node: Node, program: Program, sourceFiles: SourceFile[], cancellationToken: CancellationToken, options: Options = {}): Entry[] | undefined {
+        return flattenEntries(Core.getReferencedSymbolsForNode(node, program, sourceFiles, cancellationToken, options));
+    }
+
+    function findAllReferencedSymbols(program: Program, cancellationToken: CancellationToken, sourceFiles: SourceFile[], sourceFile: SourceFile, position: number, options?: Options): SymbolAndEntries[] | undefined {
+        const node = getTouchingPropertyName(sourceFile, position, /*includeJsDocComment*/ true);
+        return Core.getReferencedSymbolsForNode(node, program, sourceFiles, cancellationToken, options);
+    }
+
+    function flattenEntries(referenceSymbols: SymbolAndEntries[]): Entry[] {
+        return referenceSymbols && flatMap(referenceSymbols, r => r.references);
+    }
+
+    function definitionToReferencedSymbolDefinitionInfo(def: Definition, checker: TypeChecker): ReferencedSymbolDefinitionInfo | undefined {
+        const info = (() => {
+            switch (def.type) {
+                case "symbol": {
+                    const { symbol, node } = def;
+                    const { displayParts, kind } = getDefinitionKindAndDisplayParts(symbol, node, checker);
+                    const name = displayParts.map(p => p.text).join("");
+                    return { node, name, kind, displayParts };
+                }
+                case "label": {
+                    const { node } = def;
+                    return { node, name: node.text, kind: ScriptElementKind.label, displayParts: [displayPart(node.text, SymbolDisplayPartKind.text)] };
                 }
-                else {
-                    // it is a label definition and not a target, search within the parent labeledStatement
-                    return getLabelReferencesInNode(node.parent, <Identifier>node);
+                case "keyword": {
+                    const { node } = def;
+                    const name = tokenToString(node.kind);
+                    return { node, name, kind: ScriptElementKind.keyword, displayParts: [{ text: name, kind: ScriptElementKind.keyword }] };
+                }
+                case "this": {
+                    const { node } = def;
+                    const symbol = checker.getSymbolAtLocation(node);
+                    const displayParts = symbol && SymbolDisplay.getSymbolDisplayPartsDocumentationAndSymbolKind(
+                        checker, symbol, node.getSourceFile(), getContainerNode(node), node).displayParts;
+                    return { node, name: "this", kind: ScriptElementKind.variableElement, displayParts };
+                }
+                case "string": {
+                    const { node } = def;
+                    return { node, name: node.text, kind: ScriptElementKind.variableElement, displayParts: [displayPart(getTextOfNode(node), SymbolDisplayPartKind.stringLiteral)] };
                 }
             }
+        })();
 
-            if (isThis(node)) {
-                return getReferencesForThisKeyword(node, sourceFiles);
-            }
+        if (!info) {
+            return undefined;
+        }
 
-            if (node.kind === SyntaxKind.SuperKeyword) {
-                return getReferencesForSuperKeyword(node);
-            }
+        const { node, name, kind, displayParts } = info;
+        const sourceFile = node.getSourceFile();
+        return {
+            containerKind: ScriptElementKind.unknown,
+            containerName: "",
+            fileName: sourceFile.fileName,
+            kind,
+            name,
+            textSpan: createTextSpanFromNode(node, sourceFile),
+            displayParts
+        };
+    }
+
+    function getDefinitionKindAndDisplayParts(symbol: Symbol, node: Node, checker: TypeChecker): { displayParts: SymbolDisplayPart[], kind: ScriptElementKind } {
+        const { displayParts, symbolKind } =
+            SymbolDisplay.getSymbolDisplayPartsDocumentationAndSymbolKind(checker, symbol, node.getSourceFile(), getContainerNode(node), node);
+        return { displayParts, kind: symbolKind };
+    }
+
+    function toReferenceEntry(entry: Entry): ReferenceEntry {
+        if (entry.type === "span") {
+            return { textSpan: entry.textSpan, fileName: entry.fileName, isWriteAccess: false, isDefinition: false };
         }
 
-        // `getSymbolAtLocation` normally returns the symbol of the class when given the constructor keyword,
-        // so we have to specify that we want the constructor symbol.
-        const symbol = typeChecker.getSymbolAtLocation(node);
+        const { node, isInString } = entry;
+        return {
+            fileName: node.getSourceFile().fileName,
+            textSpan: getTextSpan(node),
+            isWriteAccess: isWriteAccess(node),
+            isDefinition: isAnyDeclarationName(node) || isLiteralComputedPropertyDeclarationName(node),
+            isInString
+        };
+    }
+
+    function toImplementationLocation(entry: Entry, checker: ts.TypeChecker): ImplementationLocation {
+        if (entry.type === "node") {
+            const { node } = entry;
+            return { textSpan: getTextSpan(node), fileName: node.getSourceFile().fileName, ...implementationKindDisplayParts(node, checker) };
+        }
+        else {
+            const { textSpan, fileName } = entry;
+            return { textSpan, fileName, kind: ScriptElementKind.unknown, displayParts: [] };
+        }
+    }
 
-        if (!implementations && !symbol && node.kind === SyntaxKind.StringLiteral) {
-            return getReferencesForStringLiteral(<StringLiteral>node, sourceFiles);
+    function implementationKindDisplayParts(node: ts.Node, checker: ts.TypeChecker): { kind: ScriptElementKind, displayParts: SymbolDisplayPart[] } {
+        const symbol = checker.getSymbolAtLocation(isDeclaration(node) && node.name ? node.name : node);
+        if (symbol) {
+            return getDefinitionKindAndDisplayParts(symbol, node, checker);
+        }
+        else if (node.kind === SyntaxKind.ObjectLiteralExpression) {
+            return {
+                kind: ScriptElementKind.interfaceElement,
+                displayParts: [punctuationPart(SyntaxKind.OpenParenToken), textPart("object literal"), punctuationPart(SyntaxKind.CloseParenToken)]
+            };
+        }
+        else if (node.kind === SyntaxKind.ClassExpression) {
+            return {
+                kind: ScriptElementKind.localClassElement,
+                displayParts: [punctuationPart(SyntaxKind.OpenParenToken), textPart("anonymous local class"), punctuationPart(SyntaxKind.CloseParenToken)]
+            };
+        }
+        else {
+            return { kind: getNodeKind(node), displayParts: [] };
+        }
+    }
+
+    export function toHighlightSpan(entry: FindAllReferences.Entry): { fileName: string, span: HighlightSpan } {
+        if (entry.type === "span") {
+            const { fileName, textSpan } = entry;
+            return { fileName, span: { textSpan, kind: HighlightSpanKind.reference } };
+        }
+
+        const { node, isInString } = entry;
+        const fileName = entry.node.getSourceFile().fileName;
+        const writeAccess = isWriteAccess(node);
+        const span: HighlightSpan = {
+            textSpan: getTextSpan(node),
+            kind: writeAccess ? HighlightSpanKind.writtenReference : HighlightSpanKind.reference,
+            isInString
+        };
+        return { fileName, span };
+    }
+
+    function getTextSpan(node: Node): TextSpan {
+        let start = node.getStart();
+        let end = node.getEnd();
+        if (node.kind === SyntaxKind.StringLiteral) {
+            start += 1;
+            end -= 1;
+        }
+        return createTextSpanFromBounds(start, end);
+    }
+
+    /** A node is considered a writeAccess iff it is a name of a declaration or a target of an assignment */
+    function isWriteAccess(node: Node): boolean {
+        if (isAnyDeclarationName(node)) {
+            return true;
+        }
+
+        const { parent } = node;
+        switch (parent && parent.kind) {
+            case SyntaxKind.PostfixUnaryExpression:
+            case SyntaxKind.PrefixUnaryExpression:
+                return true;
+            case SyntaxKind.BinaryExpression:
+                return (<BinaryExpression>parent).left === node && isAssignmentOperator((<BinaryExpression>parent).operatorToken.kind);
+            default:
+                return false;
+        }
+    }
+}
+
+/** Encapsulates the core find-all-references algorithm. */
+/* @internal */
+namespace ts.FindAllReferences.Core {
+    /** Core find-all-references algorithm. Handles special cases before delegating to `getReferencedSymbolsForSymbol`. */
+    export function getReferencedSymbolsForNode(node: Node, program: Program, sourceFiles: SourceFile[], cancellationToken: CancellationToken, options: Options = {}): SymbolAndEntries[] | undefined {
+        if (node.kind === ts.SyntaxKind.SourceFile) {
+            return undefined;
+        }
+
+        if (!options.implementations) {
+            const special = getReferencedSymbolsSpecial(node, sourceFiles, cancellationToken);
+            if (special) {
+                return special;
+            }
         }
 
+        const checker = program.getTypeChecker();
+        const symbol = checker.getSymbolAtLocation(node);
 
         // Could not find a symbol e.g. unknown identifier
         if (!symbol) {
+            // String literal might be a property (and thus have a symbol), so do this here rather than in getReferencedSymbolsSpecial.
+            if (!options.implementations && node.kind === SyntaxKind.StringLiteral) {
+                return getReferencesForStringLiteral(<StringLiteral>node, sourceFiles, cancellationToken);
+            }
             // Can't have references to something that we have no symbol for.
             return undefined;
         }
 
-        const declarations = symbol.declarations;
+        if (symbol.flags & SymbolFlags.Module && isModuleReferenceLocation(node)) {
+            return getReferencedSymbolsForModule(program, symbol, sourceFiles);
+        }
 
-        // The symbol was an internal symbol and does not have a declaration e.g. undefined symbol
-        if (!declarations || !declarations.length) {
-            return undefined;
+        return getReferencedSymbolsForSymbol(symbol, node, sourceFiles, checker, cancellationToken, options);
+    }
+
+    function isModuleReferenceLocation(node: ts.Node): boolean {
+        if (node.kind !== SyntaxKind.StringLiteral) {
+            return false;
+        }
+        switch (node.parent.kind) {
+            case SyntaxKind.ModuleDeclaration:
+            case SyntaxKind.ExternalModuleReference:
+            case SyntaxKind.ImportDeclaration:
+            case SyntaxKind.ExportDeclaration:
+                return true;
+            case SyntaxKind.CallExpression:
+                return isRequireCall(node.parent as CallExpression, /*checkArgumentIsStringLiteral*/ false) || isImportCall(node.parent as CallExpression);
+            default:
+                return false;
         }
+    }
 
-        let result: ReferencedSymbol[];
+    function getReferencedSymbolsForModule(program: Program, symbol: Symbol, sourceFiles: SourceFile[]): SymbolAndEntries[] {
+        Debug.assert(!!symbol.valueDeclaration);
+
+        const references = findModuleReferences(program, sourceFiles, symbol).map<Entry>(reference => {
+            if (reference.kind === "import") {
+                return { type: "node", node: reference.literal };
+            }
+            else {
+                return {
+                    type: "span",
+                    fileName: reference.referencingFile.fileName,
+                    textSpan: createTextSpanFromRange(reference.ref),
+                };
+            }
+        });
+
+        for (const decl of symbol.declarations) {
+            switch (decl.kind) {
+                case ts.SyntaxKind.SourceFile:
+                    // Don't include the source file itself. (This may not be ideal behavior, but awkward to include an entire file as a reference.)
+                    break;
+                case ts.SyntaxKind.ModuleDeclaration:
+                    references.push({ type: "node", node: (decl as ts.ModuleDeclaration).name });
+                    break;
+                default:
+                    Debug.fail("Expected a module symbol to be declared by a SourceFile or ModuleDeclaration.");
+            }
+        }
+
+        return [{
+            definition: { type: "symbol", symbol, node: symbol.valueDeclaration },
+            references
+        }];
+    }
+
+    /** getReferencedSymbols for special node kinds. */
+    function getReferencedSymbolsSpecial(node: Node, sourceFiles: SourceFile[], cancellationToken: CancellationToken): SymbolAndEntries[] | undefined {
+        if (isTypeKeyword(node.kind)) {
+            return getAllReferencesForKeyword(sourceFiles, node.kind, cancellationToken);
+        }
+
+        // Labels
+        if (isLabelName(node)) {
+            if (isJumpStatementTarget(node)) {
+                const labelDefinition = getTargetLabel((<BreakOrContinueStatement>node.parent), (<Identifier>node).text);
+                // if we have a label definition, look within its statement for references, if not, then
+                // the label is undefined and we have no results..
+                return labelDefinition && getLabelReferencesInNode(labelDefinition.parent, labelDefinition);
+            }
+            else {
+                // it is a label definition and not a target, search within the parent labeledStatement
+                return getLabelReferencesInNode(node.parent, <Identifier>node);
+            }
+        }
+
+        if (isThis(node)) {
+            return getReferencesForThisKeyword(node, sourceFiles, cancellationToken);
+        }
+
+        if (node.kind === SyntaxKind.SuperKeyword) {
+            return getReferencesForSuperKeyword(node);
+        }
+
+        return undefined;
+    }
+
+    /** Core find-all-references algorithm for a normal symbol. */
+    function getReferencedSymbolsForSymbol(symbol: Symbol, node: Node, sourceFiles: SourceFile[], checker: TypeChecker, cancellationToken: CancellationToken, options: Options): SymbolAndEntries[] {
+        symbol = skipPastExportOrImportSpecifier(symbol, node, checker);
 
         // Compute the meaning from the location and the symbol it references
-        const searchMeaning = getIntersectingMeaningFromDeclarations(getMeaningFromLocation(node), declarations);
+        const searchMeaning = getIntersectingMeaningFromDeclarations(getMeaningFromLocation(node), symbol.declarations);
 
-        // Get the text to search for.
-        // Note: if this is an external module symbol, the name doesn't include quotes.
-        const declaredName = stripQuotes(getDeclaredName(typeChecker, symbol, node));
+        const result: SymbolAndEntries[] = [];
+        const state = new State(sourceFiles, /*isForConstructor*/ node.kind === SyntaxKind.ConstructorKeyword, checker, cancellationToken, searchMeaning, options, result);
+        const search = state.createSearch(node, symbol, /*comingFrom*/ undefined, { allSearchSymbols: populateSearchSymbolSet(symbol, node, checker, options.implementations) });
 
         // Try to get the smallest valid scope that we can limit our search to;
         // otherwise we'll need to search globally (i.e. include each file).
         const scope = getSymbolScope(symbol);
-
-        // Maps from a symbol ID to the ReferencedSymbol entry in 'result'.
-        const symbolToIndex: number[] = [];
-
         if (scope) {
-            result = [];
-            getReferencesInNode(scope, symbol, declaredName, node, searchMeaning, findInStrings, findInComments, result, symbolToIndex);
+            getReferencesInContainer(scope, scope.getSourceFile(), search, state);
         }
         else {
-            const internedName = getInternedName(symbol, node, declarations);
-            for (const sourceFile of sourceFiles) {
-                cancellationToken.throwIfCancellationRequested();
-
-                const nameTable = getNameTable(sourceFile);
-
-                if (nameTable[internedName] !== undefined) {
-                    result = result || [];
-                    getReferencesInNode(sourceFile, symbol, declaredName, node, searchMeaning, findInStrings, findInComments, result, symbolToIndex);
-                }
+            // Global search
+            for (const sourceFile of state.sourceFiles) {
+                state.cancellationToken.throwIfCancellationRequested();
+                searchForName(sourceFile, search, state);
             }
         }
 
         return result;
+    }
 
-        function getDefinition(symbol: Symbol): ReferencedSymbolDefinitionInfo {
-            const info = SymbolDisplay.getSymbolDisplayPartsDocumentationAndSymbolKind(typeChecker, symbol, node.getSourceFile(), getContainerNode(node), node);
-            const name = map(info.displayParts, p => p.text).join("");
-            const declarations = symbol.declarations;
-            if (!declarations || declarations.length === 0) {
-                return undefined;
-            }
+    /** Handle a few special cases relating to export/import specifiers. */
+    function skipPastExportOrImportSpecifier(symbol: Symbol, node: Node, checker: TypeChecker): Symbol {
+        const { parent } = node;
+        if (isExportSpecifier(parent)) {
+            return getLocalSymbolForExportSpecifier(node as Identifier, symbol, parent, checker);
+        }
+        if (isImportSpecifier(parent) && parent.propertyName === node) {
+            // We're at `foo` in `import { foo as bar }`. Probably intended to find all refs on the original, not just on the import.
+            return checker.getImmediateAliasedSymbol(symbol);
+        }
+
+        return symbol;
+    }
+
+    /**
+     * Symbol that is currently being searched for.
+     * This will be replaced if we find an alias for the symbol.
+     */
+    interface Search {
+        /** If coming from an export, we will not recursively search for the imported symbol (since that's where we came from). */
+        readonly comingFrom?: ImportExport;
+
+        readonly location: Node;
+        readonly symbol: Symbol;
+        readonly text: string;
+        readonly escapedText: string;
+        /** Only set if `options.implementations` is true. These are the symbols checked to get the implementations of a property access. */
+        readonly parents: Symbol[] | undefined;
+
+        /**
+         * Whether a symbol is in the search set.
+         * Do not compare directly to `symbol` because there may be related symbols to search for. See `populateSearchSymbolSet`.
+         */
+        includes(symbol: Symbol): boolean;
+    }
 
+    /**
+     * Holds all state needed for the finding references.
+     * Unlike `Search`, there is only one `State`.
+     */
+    class State {
+        /** Cache for `explicitlyinheritsFrom`. */
+        readonly inheritsFromCache = createMap<boolean>();
+
+        /**
+         * Type nodes can contain multiple references to the same type. For example:
+         *      let x: Foo & (Foo & Bar) = ...
+         * Because we are returning the implementation locations and not the identifier locations,
+         * duplicate entries would be returned here as each of the type references is part of
+         * the same implementation. For that reason, check before we add a new entry.
+         */
+        readonly markSeenContainingTypeReference = nodeSeenTracker();
+
+        /**
+         * It's possible that we will encounter the right side of `export { foo as bar } from "x";` more than once.
+         * For example:
+         *     // b.ts
+         *     export { foo as bar } from "./a";
+         *     import { bar } from "./b";
+         *
+         * Normally at `foo as bar` we directly add `foo` and do not locally search for it (since it doesn't declare a local).
+         * But another reference to it may appear in the same source file.
+         * See `tests/cases/fourslash/transitiveExportImports3.ts`.
+         */
+        readonly markSeenReExportRHS = nodeSeenTracker();
+
+        constructor(
+            readonly sourceFiles: SourceFile[],
+            /** True if we're searching for constructor references. */
+            readonly isForConstructor: boolean,
+            readonly checker: TypeChecker,
+            readonly cancellationToken: CancellationToken,
+            readonly searchMeaning: SemanticMeaning,
+            readonly options: Options,
+            private readonly result: Push<SymbolAndEntries>) {}
+
+        private importTracker: ImportTracker | undefined;
+        /** Gets every place to look for references of an exported symbols. See `ImportsResult` in `importTracker.ts` for more documentation. */
+        getImportSearches(exportSymbol: Symbol, exportInfo: ExportInfo): ImportsResult {
+            if (!this.importTracker) this.importTracker = createImportTracker(this.sourceFiles, this.checker, this.cancellationToken);
+            return this.importTracker(exportSymbol, exportInfo, this.options.isForRename);
+        }
+
+        /** @param allSearchSymbols set of additinal symbols for use by `includes`. */
+        createSearch(location: Node, symbol: Symbol, comingFrom: ImportExport | undefined, searchOptions: { text?: string, allSearchSymbols?: Symbol[] } = {}): Search {
+            // Note: if this is an external module symbol, the name doesn't include quotes.
+            const { text = stripQuotes(getDeclaredName(this.checker, symbol, location)), allSearchSymbols = undefined } = searchOptions;
+            const escapedText = escapeIdentifier(text);
+            const parents = this.options.implementations && getParentSymbolsOfPropertyAccess(location, symbol, this.checker);
             return {
-                containerKind: "",
-                containerName: "",
-                name,
-                kind: info.symbolKind,
-                fileName: declarations[0].getSourceFile().fileName,
-                textSpan: createTextSpan(declarations[0].getStart(), 0),
-                displayParts: info.displayParts
+                location, symbol, comingFrom, text, escapedText, parents,
+                includes: referenceSymbol => allSearchSymbols ? contains(allSearchSymbols, referenceSymbol) : referenceSymbol === symbol,
             };
         }
 
-        function getAliasSymbolForPropertyNameSymbol(symbol: Symbol, location: Node): Symbol | undefined {
-            if (symbol.flags & SymbolFlags.Alias) {
-                // Default import get alias
-                const defaultImport = getDeclarationOfKind(symbol, SyntaxKind.ImportClause);
-                if (defaultImport) {
-                    return typeChecker.getAliasedSymbol(symbol);
-                }
+        private readonly symbolIdToReferences: Entry[][] = [];
+        /**
+         * Callback to add references for a particular searched symbol.
+         * This initializes a reference group, so only call this if you will add at least one reference.
+         */
+        referenceAdder(searchSymbol: Symbol, searchLocation: Node): (node: Node) => void {
+            const symbolId = getSymbolId(searchSymbol);
+            let references = this.symbolIdToReferences[symbolId];
+            if (!references) {
+                references = this.symbolIdToReferences[symbolId] = [];
+                this.result.push({ definition: { type: "symbol", symbol: searchSymbol, node: searchLocation }, references });
+            }
+            return node => references.push(nodeEntry(node));
+        }
 
-                const importOrExportSpecifier = <ImportOrExportSpecifier>forEach(symbol.declarations,
-                    declaration => (declaration.kind === SyntaxKind.ImportSpecifier ||
-                        declaration.kind === SyntaxKind.ExportSpecifier) ? declaration : undefined);
-                if (importOrExportSpecifier &&
-                    // export { a }
-                    (!importOrExportSpecifier.propertyName ||
-                        // export {a as class } where a is location
-                        importOrExportSpecifier.propertyName === location)) {
-                    // If Import specifier -> get alias
-                    // else Export specifier -> get local target
-                    return importOrExportSpecifier.kind === SyntaxKind.ImportSpecifier ?
-                        typeChecker.getAliasedSymbol(symbol) :
-                        typeChecker.getExportSpecifierLocalTargetSymbol(importOrExportSpecifier);
-                }
-            }
-            return undefined;
+        /** Add a reference with no associated definition. */
+        addStringOrCommentReference(fileName: string, textSpan: TextSpan): void {
+            this.result.push({
+                definition: undefined,
+                references: [{ type: "span", fileName, textSpan }]
+            });
         }
 
-        function followAliasIfNecessary(symbol: Symbol, location: Node): Symbol {
-            return getAliasSymbolForPropertyNameSymbol(symbol, location) || symbol;
+        // Source file ID → symbol ID → Whether the symbol has been searched for in the source file.
+        private readonly sourceFileToSeenSymbols: Array<Array<true>> = [];
+        /** Returns `true` the first time we search for a symbol in a file and `false` afterwards. */
+        markSearchedSymbol(sourceFile: SourceFile, symbol: Symbol): boolean {
+            const sourceId = getNodeId(sourceFile);
+            const symbolId = getSymbolId(symbol);
+            const seenSymbols = this.sourceFileToSeenSymbols[sourceId] || (this.sourceFileToSeenSymbols[sourceId] = []);
+            return !seenSymbols[symbolId] && (seenSymbols[symbolId] = true);
         }
+    }
 
-        function getPropertySymbolOfDestructuringAssignment(location: Node) {
-            return isArrayLiteralOrObjectLiteralDestructuringPattern(location.parent.parent) &&
-                typeChecker.getPropertySymbolOfDestructuringAssignment(<Identifier>location);
+    /** Search for all imports of a given exported symbol using `State.getImportSearches`. */
+    function searchForImportsOfExport(exportLocation: Node, exportSymbol: Symbol, exportInfo: ExportInfo, state: State): void {
+        const { importSearches, singleReferences, indirectUsers } = state.getImportSearches(exportSymbol, exportInfo);
+
+        // For `import { foo as bar }` just add the reference to `foo`, and don't otherwise search in the file.
+        if (singleReferences.length) {
+            const addRef = state.referenceAdder(exportSymbol, exportLocation);
+            for (const singleRef of singleReferences) {
+                addRef(singleRef);
+            }
         }
 
-        function isObjectBindingPatternElementWithoutPropertyName(symbol: Symbol) {
-            const bindingElement = <BindingElement>getDeclarationOfKind(symbol, SyntaxKind.BindingElement);
-            return bindingElement &&
-                bindingElement.parent.kind === SyntaxKind.ObjectBindingPattern &&
-                !bindingElement.propertyName;
+        // For each import, find all references to that import in its source file.
+        for (const [importLocation, importSymbol] of importSearches) {
+            getReferencesInSourceFile(importLocation.getSourceFile(), state.createSearch(importLocation, importSymbol, ImportExport.Export), state);
         }
 
-        function getPropertySymbolOfObjectBindingPatternWithoutPropertyName(symbol: Symbol) {
-            if (isObjectBindingPatternElementWithoutPropertyName(symbol)) {
-                const bindingElement = <BindingElement>getDeclarationOfKind(symbol, SyntaxKind.BindingElement);
-                const typeOfPattern = typeChecker.getTypeAtLocation(bindingElement.parent);
-                return typeOfPattern && typeChecker.getPropertyOfType(typeOfPattern, (<Identifier>bindingElement.name).text);
+        if (indirectUsers.length) {
+            let indirectSearch: Search | undefined;
+            switch (exportInfo.exportKind) {
+                case ExportKind.Named:
+                    indirectSearch = state.createSearch(exportLocation, exportSymbol, ImportExport.Export);
+                    break;
+                case ExportKind.Default:
+                    // Search for a property access to '.default'. This can't be renamed.
+                    indirectSearch = state.options.isForRename ? undefined : state.createSearch(exportLocation, exportSymbol, ImportExport.Export, { text: "default" });
+                    break;
+                case ExportKind.ExportEquals:
+                    break;
+            }
+            if (indirectSearch) {
+                for (const indirectUser of indirectUsers) {
+                    searchForName(indirectUser, indirectSearch, state);
+                }
             }
-            return undefined;
         }
+    }
 
-        function getInternedName(symbol: Symbol, location: Node, declarations: Declaration[]): string {
-            // If this is an export or import specifier it could have been renamed using the 'as' syntax.
-            // If so we want to search for whatever under the cursor.
-            if (isImportOrExportSpecifierName(location)) {
-                return location.getText();
-            }
+    // Go to the symbol we imported from and find references for it.
+    function searchForImportedSymbol(symbol: Symbol, state: State): void {
+        for (const declaration of symbol.declarations) {
+            getReferencesInSourceFile(declaration.getSourceFile(), state.createSearch(declaration, symbol, ImportExport.Import), state);
+        }
+    }
+
+    /** Search for all occurences of an identifier in a source file (and filter out the ones that match). */
+    function searchForName(sourceFile: SourceFile, search: Search, state: State): void {
+        if (getNameTable(sourceFile).get(search.escapedText) !== undefined) {
+            getReferencesInSourceFile(sourceFile, search, state);
+        }
+    }
 
-            // Try to get the local symbol if we're dealing with an 'export default'
-            // since that symbol has the "true" name.
-            const localExportDefaultSymbol = getLocalSymbolForExportDefault(symbol);
-            symbol = localExportDefaultSymbol || symbol;
+    function getPropertySymbolOfDestructuringAssignment(location: Node, checker: TypeChecker): Symbol | undefined {
+        return isArrayLiteralOrObjectLiteralDestructuringPattern(location.parent.parent) &&
+            checker.getPropertySymbolOfDestructuringAssignment(<Identifier>location);
+    }
 
-            return stripQuotes(symbol.name);
+    function isObjectBindingPatternElementWithoutPropertyName(symbol: Symbol): boolean {
+        const bindingElement = getDeclarationOfKind<BindingElement>(symbol, SyntaxKind.BindingElement);
+        return bindingElement &&
+            bindingElement.parent.kind === SyntaxKind.ObjectBindingPattern &&
+            !bindingElement.propertyName;
+    }
+
+    function getPropertySymbolOfObjectBindingPatternWithoutPropertyName(symbol: Symbol, checker: TypeChecker): Symbol | undefined {
+        if (isObjectBindingPatternElementWithoutPropertyName(symbol)) {
+            const bindingElement = getDeclarationOfKind<BindingElement>(symbol, SyntaxKind.BindingElement);
+            const typeOfPattern = checker.getTypeAtLocation(bindingElement.parent);
+            return typeOfPattern && checker.getPropertyOfType(typeOfPattern, (<Identifier>bindingElement.name).text);
         }
+        return undefined;
+    }
 
-        /**
-         * Determines the smallest scope in which a symbol may have named references.
-         * Note that not every construct has been accounted for. This function can
-         * probably be improved.
-         *
-         * @returns undefined if the scope cannot be determined, implying that
-         * a reference to a symbol can occur anywhere.
-         */
-        function getSymbolScope(symbol: Symbol): Node {
-            // If this is the symbol of a named function expression or named class expression,
-            // then named references are limited to its own scope.
-            const valueDeclaration = symbol.valueDeclaration;
-            if (valueDeclaration && (valueDeclaration.kind === SyntaxKind.FunctionExpression || valueDeclaration.kind === SyntaxKind.ClassExpression)) {
-                return valueDeclaration;
-            }
+    /**
+     * Determines the smallest scope in which a symbol may have named references.
+     * Note that not every construct has been accounted for. This function can
+     * probably be improved.
+     *
+     * @returns undefined if the scope cannot be determined, implying that
+     * a reference to a symbol can occur anywhere.
+     */
+    function getSymbolScope(symbol: Symbol): Node | undefined {
+        // If this is the symbol of a named function expression or named class expression,
+        // then named references are limited to its own scope.
+        const { declarations, flags, parent, valueDeclaration } = symbol;
+        if (valueDeclaration && (valueDeclaration.kind === SyntaxKind.FunctionExpression || valueDeclaration.kind === SyntaxKind.ClassExpression)) {
+            return valueDeclaration;
+        }
 
-            // If this is private property or method, the scope is the containing class
-            if (symbol.flags & (SymbolFlags.Property | SymbolFlags.Method)) {
-                const privateDeclaration = forEach(symbol.getDeclarations(), d => (getModifierFlags(d) & ModifierFlags.Private) ? d : undefined);
-                if (privateDeclaration) {
-                    return getAncestor(privateDeclaration, SyntaxKind.ClassDeclaration);
-                }
-            }
+        if (!declarations) {
+            return undefined;
+        }
 
-            // If the symbol is an import we would like to find it if we are looking for what it imports.
-            // So consider it visible outside its declaration scope.
-            if (symbol.flags & SymbolFlags.Alias) {
-                return undefined;
+        // If this is private property or method, the scope is the containing class
+        if (flags & (SymbolFlags.Property | SymbolFlags.Method)) {
+            const privateDeclaration = find(declarations, d => hasModifier(d, ModifierFlags.Private));
+            if (privateDeclaration) {
+                return getAncestor(privateDeclaration, SyntaxKind.ClassDeclaration);
             }
+            // Else this is a public property and could be accessed from anywhere.
+            return undefined;
+        }
+
+        // If symbol is of object binding pattern element without property name we would want to
+        // look for property too and that could be anywhere
+        if (isObjectBindingPatternElementWithoutPropertyName(symbol)) {
+            return undefined;
+        }
+
+        // If the symbol has a parent, it's globally visible.
+        // Unless that parent is an external module, then we should only search in the module (and recurse on the export later).
+        // But if the parent is a module that has `export as namespace`, then the symbol *is* globally visible.
+        if (parent && !((parent.flags & SymbolFlags.Module) && isExternalModuleSymbol(parent) && !parent.globalExports)) {
+            return undefined;
+        }
 
-            // If symbol is of object binding pattern element without property name we would want to
-            // look for property too and that could be anywhere
-            if (isObjectBindingPatternElementWithoutPropertyName(symbol)) {
+        let scope: Node | undefined;
+        for (const declaration of declarations) {
+            const container = getContainerNode(declaration);
+            if (scope && scope !== container) {
+                // Different declarations have different containers, bail out
                 return undefined;
             }
 
-            // if this symbol is visible from its parent container, e.g. exported, then bail out
-            // if symbol correspond to the union property - bail out
-            if (symbol.parent || (symbol.flags & SymbolFlags.SyntheticProperty)) {
+            if (!container || container.kind === SyntaxKind.SourceFile && !isExternalOrCommonJsModule(<SourceFile>container)) {
+                // This is a global variable and not an external module, any declaration defined
+                // within this scope is visible outside the file
                 return undefined;
             }
 
-            let scope: Node;
+            // The search scope is the container node
+            scope = container;
+        }
 
-            const declarations = symbol.getDeclarations();
-            if (declarations) {
-                for (const declaration of declarations) {
-                    const container = getContainerNode(declaration);
+        // If symbol.parent, this means we are in an export of an external module. (Otherwise we would have returned `undefined` above.)
+        // For an export of a module, we may be in a declaration file, and it may be accessed elsewhere. E.g.:
+        //     declare module "a" { export type T = number; }
+        //     declare module "b" { import { T } from "a"; export const x: T; }
+        // So we must search the whole source file. (Because we will mark the source file as seen, we we won't return to it when searching for imports.)
+        return parent ? scope.getSourceFile() : scope;
+    }
 
-                    if (!container) {
-                        return undefined;
-                    }
+    function getPossibleSymbolReferencePositions(sourceFile: SourceFile, symbolName: string, container: Node = sourceFile): number[] {
+        const positions: number[] = [];
 
-                    if (scope && scope !== container) {
-                        // Different declarations have different containers, bail out
-                        return undefined;
-                    }
+        /// TODO: Cache symbol existence for files to save text search
+        // Also, need to make this work for unicode escapes.
 
-                    if (container.kind === SyntaxKind.SourceFile && !isExternalModule(<SourceFile>container)) {
-                        // This is a global variable and not an external module, any declaration defined
-                        // within this scope is visible outside the file
-                        return undefined;
-                    }
+        // Be resilient in the face of a symbol with no name or zero length name
+        if (!symbolName || !symbolName.length) {
+            return positions;
+        }
 
-                    // The search scope is the container node
-                    scope = container;
-                }
-            }
+        const text = sourceFile.text;
+        const sourceLength = text.length;
+        const symbolNameLength = symbolName.length;
 
-            return scope;
-        }
+        let position = text.indexOf(symbolName, container.pos);
+        while (position >= 0) {
+            // If we are past the end, stop looking
+            if (position > container.end) break;
 
-        function getPossibleSymbolReferencePositions(sourceFile: SourceFile, symbolName: string, start: number, end: number): number[] {
-            const positions: number[] = [];
+            // We found a match.  Make sure it's not part of a larger word (i.e. the char
+            // before and after it have to be a non-identifier char).
+            const endPosition = position + symbolNameLength;
 
-            /// TODO: Cache symbol existence for files to save text search
-            // Also, need to make this work for unicode escapes.
+            if ((position === 0 || !isIdentifierPart(text.charCodeAt(position - 1), ScriptTarget.Latest)) &&
+                (endPosition === sourceLength || !isIdentifierPart(text.charCodeAt(endPosition), ScriptTarget.Latest))) {
+                // Found a real match.  Keep searching.
+                positions.push(position);
+            }
+            position = text.indexOf(symbolName, position + symbolNameLength + 1);
+        }
 
-            // Be resilient in the face of a symbol with no name or zero length name
-            if (!symbolName || !symbolName.length) {
-                return positions;
+        return positions;
+    }
+
+    function getLabelReferencesInNode(container: Node, targetLabel: Identifier): SymbolAndEntries[] {
+        const references: Entry[] = [];
+        const sourceFile = container.getSourceFile();
+        const labelName = targetLabel.text;
+        const possiblePositions = getPossibleSymbolReferencePositions(sourceFile, labelName, container);
+        for (const position of possiblePositions) {
+            const node = getTouchingWord(sourceFile, position, /*includeJsDocComment*/ false);
+            // Only pick labels that are either the target label, or have a target that is the target label
+            if (node && (node === targetLabel || (isJumpStatementTarget(node) && getTargetLabel(node, labelName) === targetLabel))) {
+                references.push(nodeEntry(node));
             }
+        }
 
-            const text = sourceFile.text;
-            const sourceLength = text.length;
-            const symbolNameLength = symbolName.length;
+        return [{ definition: { type: "label", node: targetLabel }, references }];
+    }
 
-            let position = text.indexOf(symbolName, start);
-            while (position >= 0) {
-                cancellationToken.throwIfCancellationRequested();
+    function isValidReferencePosition(node: Node, searchSymbolName: string): boolean {
+        // Compare the length so we filter out strict superstrings of the symbol we are looking for
+        switch (node && node.kind) {
+            case SyntaxKind.Identifier:
+                return unescapeIdentifier((node as Identifier).text).length === searchSymbolName.length;
 
-                // If we are past the end, stop looking
-                if (position > end) break;
+            case SyntaxKind.StringLiteral:
+                return (isLiteralNameOfPropertyDeclarationOrIndexAccess(node) || isNameOfExternalModuleImportOrDeclaration(node)) &&
+                    (node as StringLiteral).text.length === searchSymbolName.length;
 
-                // We found a match.  Make sure it's not part of a larger word (i.e. the char
-                // before and after it have to be a non-identifier char).
-                const endPosition = position + symbolNameLength;
+            case SyntaxKind.NumericLiteral:
+                return isLiteralNameOfPropertyDeclarationOrIndexAccess(node) && (node as NumericLiteral).text.length === searchSymbolName.length;
 
-                if ((position === 0 || !isIdentifierPart(text.charCodeAt(position - 1), ScriptTarget.Latest)) &&
-                    (endPosition === sourceLength || !isIdentifierPart(text.charCodeAt(endPosition), ScriptTarget.Latest))) {
-                    // Found a real match.  Keep searching.
-                    positions.push(position);
-                }
-                position = text.indexOf(symbolName, position + symbolNameLength + 1);
-            }
+            default:
+                return false;
+        }
+    }
 
-            return positions;
+    function getAllReferencesForKeyword(sourceFiles: SourceFile[], keywordKind: ts.SyntaxKind, cancellationToken: CancellationToken): SymbolAndEntries[] {
+        const references: NodeEntry[] = [];
+        for (const sourceFile of sourceFiles) {
+            cancellationToken.throwIfCancellationRequested();
+            addReferencesForKeywordInFile(sourceFile, keywordKind, tokenToString(keywordKind), references);
         }
+        return references.length ? [{ definition: { type: "keyword", node: references[0].node }, references }] : undefined;
+    }
 
-        function getLabelReferencesInNode(container: Node, targetLabel: Identifier): ReferencedSymbol[] {
-            const references: ReferenceEntry[] = [];
-            const sourceFile = container.getSourceFile();
-            const labelName = targetLabel.text;
-            const possiblePositions = getPossibleSymbolReferencePositions(sourceFile, labelName, container.getStart(), container.getEnd());
-            forEach(possiblePositions, position => {
-                cancellationToken.throwIfCancellationRequested();
+    function addReferencesForKeywordInFile(sourceFile: SourceFile, kind: SyntaxKind, searchText: string, references: Push<NodeEntry>): void {
+        const possiblePositions = getPossibleSymbolReferencePositions(sourceFile, searchText, sourceFile);
+        for (const position of possiblePositions) {
+            const referenceLocation = getTouchingPropertyName(sourceFile, position, /*includeJsDocComment*/ true);
+            if (referenceLocation.kind === kind) {
+                references.push(nodeEntry(referenceLocation));
+            }
+        }
+    }
 
-                const node = getTouchingWord(sourceFile, position);
-                if (!node || node.getWidth() !== labelName.length) {
-                    return;
-                }
+    function getReferencesInSourceFile(sourceFile: ts.SourceFile, search: Search, state: State): void {
+        state.cancellationToken.throwIfCancellationRequested();
+        return getReferencesInContainer(sourceFile, sourceFile, search, state);
+    }
 
-                // Only pick labels that are either the target label, or have a target that is the target label
-                if (node === targetLabel ||
-                    (isJumpStatementTarget(node) && getTargetLabel(node, labelName) === targetLabel)) {
-                    references.push(getReferenceEntryFromNode(node));
-                }
-            });
+    /**
+     * Search within node "container" for references for a search value, where the search value is defined as a
+     * tuple of(searchSymbol, searchText, searchLocation, and searchMeaning).
+     * searchLocation: a node where the search value
+     */
+    function getReferencesInContainer(container: Node, sourceFile: ts.SourceFile, search: Search, state: State): void {
+        if (!state.markSearchedSymbol(sourceFile, search.symbol)) {
+            return;
+        }
 
-            const definition: ReferencedSymbolDefinitionInfo = {
-                containerKind: "",
-                containerName: "",
-                fileName: targetLabel.getSourceFile().fileName,
-                kind: ScriptElementKind.label,
-                name: labelName,
-                textSpan: createTextSpanFromBounds(targetLabel.getStart(), targetLabel.getEnd()),
-                displayParts: [displayPart(labelName, SymbolDisplayPartKind.text)]
-            };
+        for (const position of getPossibleSymbolReferencePositions(sourceFile, search.text, container)) {
+            getReferencesAtLocation(sourceFile, position, search, state);
+        }
+    }
+
+    function getReferencesAtLocation(sourceFile: SourceFile, position: number, search: Search, state: State): void {
+        const referenceLocation = getTouchingPropertyName(sourceFile, position, /*includeJsDocComment*/ true);
 
-            return [{ definition, references }];
+        if (!isValidReferencePosition(referenceLocation, search.text)) {
+            // This wasn't the start of a token.  Check to see if it might be a
+            // match in a comment or string if that's what the caller is asking
+            // for.
+            if (!state.options.implementations && (state.options.findInStrings && isInString(sourceFile, position) || state.options.findInComments && isInNonReferenceComment(sourceFile, position))) {
+                // In the case where we're looking inside comments/strings, we don't have
+                // an actual definition.  So just use 'undefined' here.  Features like
+                // 'Rename' won't care (as they ignore the definitions), and features like
+                // 'FindReferences' will just filter out these results.
+                state.addStringOrCommentReference(sourceFile.fileName, createTextSpan(position, search.text.length));
+            }
+
+            return;
         }
 
-        function isValidReferencePosition(node: Node, searchSymbolName: string): boolean {
-            if (node) {
-                // Compare the length so we filter out strict superstrings of the symbol we are looking for
-                switch (node.kind) {
-                    case SyntaxKind.Identifier:
-                        return node.getWidth() === searchSymbolName.length;
+        if (!(getMeaningFromLocation(referenceLocation) & state.searchMeaning)) {
+            return;
+        }
 
-                    case SyntaxKind.StringLiteral:
-                        if (isLiteralNameOfPropertyDeclarationOrIndexAccess(node) ||
-                            isNameOfExternalModuleImportOrDeclaration(node)) {
-                            // For string literals we have two additional chars for the quotes
-                            return node.getWidth() === searchSymbolName.length + 2;
-                        }
-                        break;
+        const referenceSymbol = state.checker.getSymbolAtLocation(referenceLocation);
+        if (!referenceSymbol) {
+            return;
+        }
 
-                    case SyntaxKind.NumericLiteral:
-                        if (isLiteralNameOfPropertyDeclarationOrIndexAccess(node)) {
-                            return node.getWidth() === searchSymbolName.length;
-                        }
-                        break;
-                }
-            }
+        const { parent } = referenceLocation;
+        if (isImportSpecifier(parent) && parent.propertyName === referenceLocation) {
+            // This is added through `singleReferences` in ImportsResult. If we happen to see it again, don't add it again.
+            return;
+        }
 
-            return false;
+        if (isExportSpecifier(parent)) {
+            Debug.assert(referenceLocation.kind === SyntaxKind.Identifier);
+            getReferencesAtExportSpecifier(referenceLocation as Identifier, referenceSymbol, parent, search, state);
+            return;
         }
 
-        /** Search within node "container" for references for a search value, where the search value is defined as a
-          * tuple of(searchSymbol, searchText, searchLocation, and searchMeaning).
-          * searchLocation: a node where the search value
-          */
-        function getReferencesInNode(container: Node,
-            searchSymbol: Symbol,
-            searchText: string,
-            searchLocation: Node,
-            searchMeaning: SemanticMeaning,
-            findInStrings: boolean,
-            findInComments: boolean,
-            result: ReferencedSymbol[],
-            symbolToIndex: number[]): void {
-
-            const sourceFile = container.getSourceFile();
-
-            const start = findInComments ? container.getFullStart() : container.getStart();
-            const possiblePositions = getPossibleSymbolReferencePositions(sourceFile, searchText, start, container.getEnd());
-
-            const parents = getParentSymbolsOfPropertyAccess();
-            const inheritsFromCache: Map<boolean> = createMap<boolean>();
-
-            if (possiblePositions.length) {
-                // Build the set of symbols to search for, initially it has only the current symbol
-                const searchSymbols = populateSearchSymbolSet(searchSymbol, searchLocation);
-
-                forEach(possiblePositions, position => {
-                    cancellationToken.throwIfCancellationRequested();
-
-                    const referenceLocation = getTouchingPropertyName(sourceFile, position);
-                    if (!isValidReferencePosition(referenceLocation, searchText)) {
-                        // This wasn't the start of a token.  Check to see if it might be a
-                        // match in a comment or string if that's what the caller is asking
-                        // for.
-                        if (!implementations && ((findInStrings && isInString(sourceFile, position)) ||
-                            (findInComments && isInNonReferenceComment(sourceFile, position)))) {
-
-                            // In the case where we're looking inside comments/strings, we don't have
-                            // an actual definition.  So just use 'undefined' here.  Features like
-                            // 'Rename' won't care (as they ignore the definitions), and features like
-                            // 'FindReferences' will just filter out these results.
-                            result.push({
-                                definition: undefined,
-                                references: [{
-                                    fileName: sourceFile.fileName,
-                                    textSpan: createTextSpan(position, searchText.length),
-                                    isWriteAccess: false,
-                                    isDefinition: false
-                                }]
-                            });
-                        }
-                        return;
-                    }
+        const relatedSymbol = getRelatedSymbol(search, referenceSymbol, referenceLocation, state);
+        if (!relatedSymbol) {
+            getReferenceForShorthandProperty(referenceSymbol, search, state);
+            return;
+        }
 
-                    if (!(getMeaningFromLocation(referenceLocation) & searchMeaning)) {
-                        return;
-                    }
+        if (state.isForConstructor) {
+            findConstructorReferences(referenceLocation, sourceFile, search, state);
+        }
+        else {
+            addReference(referenceLocation, relatedSymbol, search.location, state);
+        }
 
-                    const referenceSymbol = typeChecker.getSymbolAtLocation(referenceLocation);
-                    if (referenceSymbol) {
-                        const referenceSymbolDeclaration = referenceSymbol.valueDeclaration;
-                        const shorthandValueSymbol = typeChecker.getShorthandAssignmentValueSymbol(referenceSymbolDeclaration);
-                        const relatedSymbol = getRelatedSymbol(searchSymbols, referenceSymbol, referenceLocation,
-                            /*searchLocationIsConstructor*/ searchLocation.kind === SyntaxKind.ConstructorKeyword, parents, inheritsFromCache);
+        getImportOrExportReferences(referenceLocation, referenceSymbol, search, state);
+    }
 
-                        if (relatedSymbol) {
-                            addReferenceToRelatedSymbol(referenceLocation, relatedSymbol);
-                        }
-                        /* Because in short-hand property assignment, an identifier which stored as name of the short-hand property assignment
-                            * has two meaning : property name and property value. Therefore when we do findAllReference at the position where
-                            * an identifier is declared, the language service should return the position of the variable declaration as well as
-                            * the position in short-hand property assignment excluding property accessing. However, if we do findAllReference at the
-                            * position of property accessing, the referenceEntry of such position will be handled in the first case.
-                            */
-                        else if (!(referenceSymbol.flags & SymbolFlags.Transient) && searchSymbols.indexOf(shorthandValueSymbol) >= 0) {
-                            addReferenceToRelatedSymbol(referenceSymbolDeclaration.name, shorthandValueSymbol);
-                        }
-                        else if (searchLocation.kind === SyntaxKind.ConstructorKeyword) {
-                            findAdditionalConstructorReferences(referenceSymbol, referenceLocation);
-                        }
-                    }
-                });
-            }
+    function getReferencesAtExportSpecifier(referenceLocation: Identifier, referenceSymbol: Symbol, exportSpecifier: ExportSpecifier, search: Search, state: State): void {
+        const { parent, propertyName, name } = exportSpecifier;
+        const exportDeclaration = parent.parent;
+        const localSymbol = getLocalSymbolForExportSpecifier(referenceLocation, referenceSymbol, exportSpecifier, state.checker);
+        if (!search.includes(localSymbol)) {
             return;
+        }
 
-            /* If we are just looking for implementations and this is a property access expression, we need to get the
-             * symbol of the local type of the symbol the property is being accessed on. This is because our search
-             * symbol may have a different parent symbol if the local type's symbol does not declare the property
-             * being accessed (i.e. it is declared in some parent class or interface)
-             */
-            function getParentSymbolsOfPropertyAccess(): Symbol[] | undefined {
-                if (implementations) {
-                    const propertyAccessExpression = getPropertyAccessExpressionFromRightHandSide(searchLocation);
-                    if (propertyAccessExpression) {
-                        const localParentType = typeChecker.getTypeAtLocation(propertyAccessExpression.expression);
-                        if (localParentType) {
-                            if (localParentType.symbol && localParentType.symbol.flags & (SymbolFlags.Class | SymbolFlags.Interface) && localParentType.symbol !== searchSymbol.parent) {
-                                return [localParentType.symbol];
-                            }
-                            else if (localParentType.flags & TypeFlags.UnionOrIntersection) {
-                                return getSymbolsForClassAndInterfaceComponents(<UnionOrIntersectionType>localParentType);
-                            }
-                        }
-                    }
-                }
+        if (!propertyName) {
+            addRef();
+        }
+        else if (referenceLocation === propertyName) {
+            // For `export { foo as bar } from "baz"`, "`foo`" will be added from the singleReferences for import searches of the original export.
+            // For `export { foo as bar };`, where `foo` is a local, so add it now.
+            if (!exportDeclaration.moduleSpecifier) {
+                addRef();
             }
 
-            function getPropertyAccessExpressionFromRightHandSide(node: Node): PropertyAccessExpression {
-                return isRightSideOfPropertyAccess(node) && <PropertyAccessExpression>node.parent;
+            if (!state.options.isForRename && state.markSeenReExportRHS(name)) {
+                addReference(name, referenceSymbol, name, state);
             }
+        }
+        else {
+            if (state.markSeenReExportRHS(referenceLocation)) {
+                addRef();
+            }
+        }
 
-            /** Adds references when a constructor is used with `new this()` in its own class and `super()` calls in subclasses.  */
-            function findAdditionalConstructorReferences(referenceSymbol: Symbol, referenceLocation: Node): void {
-                Debug.assert(isClassLike(searchSymbol.valueDeclaration));
+        // For `export { foo as bar }`, rename `foo`, but not `bar`.
+        if (!(referenceLocation === propertyName && state.options.isForRename)) {
+            const exportKind = (referenceLocation as Identifier).originalKeywordKind === ts.SyntaxKind.DefaultKeyword ? ExportKind.Default : ExportKind.Named;
+            const exportInfo = getExportInfo(referenceSymbol, exportKind, state.checker);
+            Debug.assert(!!exportInfo);
+            searchForImportsOfExport(referenceLocation, referenceSymbol, exportInfo, state);
+        }
 
-                const referenceClass = referenceLocation.parent;
-                if (referenceSymbol === searchSymbol && isClassLike(referenceClass)) {
-                    Debug.assert(referenceClass.name === referenceLocation);
-                    // This is the class declaration containing the constructor.
-                    addReferences(findOwnConstructorCalls(searchSymbol));
-                }
-                else {
-                    // If this class appears in `extends C`, then the extending class' "super" calls are references.
-                    const classExtending = tryGetClassByExtendingIdentifier(referenceLocation);
-                    if (classExtending && isClassLike(classExtending) && followAliasIfNecessary(referenceSymbol, referenceLocation) === searchSymbol) {
-                        addReferences(superConstructorAccesses(classExtending));
-                    }
-                }
-            }
+        // At `export { x } from "foo"`, also search for the imported symbol `"foo".x`.
+        if (search.comingFrom !== ImportExport.Export && exportDeclaration.moduleSpecifier && !propertyName) {
+            searchForImportedSymbol(state.checker.getExportSpecifierLocalTargetSymbol(exportSpecifier), state);
+        }
 
-            function addReferences(references: Node[]): void {
-                if (references.length) {
-                    const referencedSymbol = getReferencedSymbol(searchSymbol);
-                    addRange(referencedSymbol.references, map(references, getReferenceEntryFromNode));
-                }
-            }
+        function addRef() {
+            addReference(referenceLocation, localSymbol, search.location, state);
+        }
+    }
 
-            /** `classSymbol` is the class where the constructor was defined.
-             * Reference the constructor and all calls to `new this()`.
-             */
-            function findOwnConstructorCalls(classSymbol: Symbol): Node[] {
-                const result: Node[] = [];
-
-                for (const decl of classSymbol.members["__constructor"].declarations) {
-                    Debug.assert(decl.kind === SyntaxKind.Constructor);
-                    const ctrKeyword = decl.getChildAt(0);
-                    Debug.assert(ctrKeyword.kind === SyntaxKind.ConstructorKeyword);
-                    result.push(ctrKeyword);
-                }
+    function getLocalSymbolForExportSpecifier(referenceLocation: Identifier, referenceSymbol: Symbol, exportSpecifier: ExportSpecifier, checker: TypeChecker): Symbol {
+        return isExportSpecifierAlias(referenceLocation, exportSpecifier) ? checker.getExportSpecifierLocalTargetSymbol(exportSpecifier) : referenceSymbol;
+    }
 
-                forEachProperty(classSymbol.exports, member => {
-                    const decl = member.valueDeclaration;
-                    if (decl && decl.kind === SyntaxKind.MethodDeclaration) {
-                        const body = (<MethodDeclaration>decl).body;
-                        if (body) {
-                            forEachDescendantOfKind(body, SyntaxKind.ThisKeyword, thisKeyword => {
-                                if (isNewExpressionTarget(thisKeyword)) {
-                                    result.push(thisKeyword);
-                                }
-                            });
-                        }
-                    }
-                });
+    function isExportSpecifierAlias(referenceLocation: Identifier, exportSpecifier: ExportSpecifier): boolean {
+        const { parent, propertyName, name } = exportSpecifier;
+        Debug.assert(propertyName === referenceLocation || name === referenceLocation);
+        if (propertyName) {
+            // Given `export { foo as bar } [from "someModule"]`: It's an alias at `foo`, but at `bar` it's a new symbol.
+            return propertyName === referenceLocation;
+        }
+        else {
+            // `export { foo } from "foo"` is a re-export.
+            // `export { foo };` is not a re-export, it creates an alias for the local variable `foo`.
+            return !parent.parent.moduleSpecifier;
+        }
+    }
 
-                return result;
-            }
+    function getImportOrExportReferences(referenceLocation: Node, referenceSymbol: Symbol, search: Search, state: State): void {
+        const importOrExport = getImportOrExportSymbol(referenceLocation, referenceSymbol, state.checker, search.comingFrom === ImportExport.Export);
+        if (!importOrExport) return;
 
-            /** Find references to `super` in the constructor of an extending class.  */
-            function superConstructorAccesses(cls: ClassLikeDeclaration): Node[] {
-                const symbol = cls.symbol;
-                const ctr = symbol.members["__constructor"];
-                if (!ctr) {
-                    return [];
-                }
+        const { symbol } = importOrExport;
 
-                const result: Node[] = [];
-                for (const decl of ctr.declarations) {
-                    Debug.assert(decl.kind === SyntaxKind.Constructor);
-                    const body = (<ConstructorDeclaration>decl).body;
-                    if (body) {
-                        forEachDescendantOfKind(body, SyntaxKind.SuperKeyword, node => {
-                            if (isCallExpressionTarget(node)) {
-                                result.push(node);
-                            }
-                        });
-                    }
-                };
-                return result;
+        if (importOrExport.kind === ImportExport.Import) {
+            if (!state.options.isForRename || importOrExport.isNamedImport) {
+                searchForImportedSymbol(symbol, state);
             }
+        }
+        else {
+            // We don't check for `state.isForRename`, even for default exports, because importers that previously matched the export name should be updated to continue matching.
+            searchForImportsOfExport(referenceLocation, symbol, importOrExport.exportInfo, state);
+        }
+    }
 
-            function getReferencedSymbol(symbol: Symbol): ReferencedSymbol {
-                const symbolId = getSymbolId(symbol);
-                let index = symbolToIndex[symbolId];
-                if (index === undefined) {
-                    index = result.length;
-                    symbolToIndex[symbolId] = index;
+    function getReferenceForShorthandProperty({ flags, valueDeclaration }: Symbol, search: Search, state: State): void {
+        const shorthandValueSymbol = state.checker.getShorthandAssignmentValueSymbol(valueDeclaration);
+        /*
+         * Because in short-hand property assignment, an identifier which stored as name of the short-hand property assignment
+         * has two meanings: property name and property value. Therefore when we do findAllReference at the position where
+         * an identifier is declared, the language service should return the position of the variable declaration as well as
+         * the position in short-hand property assignment excluding property accessing. However, if we do findAllReference at the
+         * position of property accessing, the referenceEntry of such position will be handled in the first case.
+         */
+        if (!(flags & SymbolFlags.Transient) && search.includes(shorthandValueSymbol)) {
+            addReference(getNameOfDeclaration(valueDeclaration), shorthandValueSymbol, search.location, state);
+        }
+    }
 
-                    result.push({
-                        definition: getDefinition(symbol),
-                        references: []
-                    });
-                }
+    function addReference(referenceLocation: Node, relatedSymbol: Symbol, searchLocation: Node, state: State): void {
+        const addRef = state.referenceAdder(relatedSymbol, searchLocation);
+        if (state.options.implementations) {
+            addImplementationReferences(referenceLocation, addRef, state);
+        }
+        else {
+            addRef(referenceLocation);
+        }
+    }
 
-                return result[index];
-            }
+    /** Adds references when a constructor is used with `new this()` in its own class and `super()` calls in subclasses.  */
+    function findConstructorReferences(referenceLocation: Node, sourceFile: SourceFile, search: Search, state: State): void {
+        if (isNewExpressionTarget(referenceLocation)) {
+            addReference(referenceLocation, search.symbol, search.location, state);
+        }
 
-            function addReferenceToRelatedSymbol(node: Node, relatedSymbol: Symbol) {
-                const references = getReferencedSymbol(relatedSymbol).references;
-                if (implementations) {
-                    getImplementationReferenceEntryForNode(node, references);
-                }
-                else {
-                    references.push(getReferenceEntryFromNode(node));
-                }
+        const pusher = state.referenceAdder(search.symbol, search.location);
+
+        if (isClassLike(referenceLocation.parent)) {
+            Debug.assert(referenceLocation.parent.name === referenceLocation);
+            // This is the class declaration containing the constructor.
+            findOwnConstructorReferences(search.symbol, sourceFile, pusher);
+        }
+        else {
+            // If this class appears in `extends C`, then the extending class' "super" calls are references.
+            const classExtending = tryGetClassByExtendingIdentifier(referenceLocation);
+            if (classExtending && isClassLike(classExtending)) {
+                findSuperConstructorAccesses(classExtending, pusher);
             }
         }
+    }
 
-        function getImplementationReferenceEntryForNode(refNode: Node, result: ReferenceEntry[]): void {
-            // Check if we found a function/propertyAssignment/method with an implementation or initializer
-            if (isDeclarationName(refNode) && isImplementation(refNode.parent)) {
-                result.push(getReferenceEntryFromNode(refNode.parent));
-            }
-            else if (refNode.kind === SyntaxKind.Identifier) {
-                if (refNode.parent.kind === SyntaxKind.ShorthandPropertyAssignment) {
-                    // Go ahead and dereference the shorthand assignment by going to its definition
-                    getReferenceEntriesForShorthandPropertyAssignment(refNode, typeChecker, result);
-                }
+    function getPropertyAccessExpressionFromRightHandSide(node: Node): PropertyAccessExpression {
+        return isRightSideOfPropertyAccess(node) && <PropertyAccessExpression>node.parent;
+    }
 
-                // Check if the node is within an extends or implements clause
-                const containingClass = getContainingClassIfInHeritageClause(refNode);
-                if (containingClass) {
-                    result.push(getReferenceEntryFromNode(containingClass));
-                    return;
-                }
+    /**
+     * `classSymbol` is the class where the constructor was defined.
+     * Reference the constructor and all calls to `new this()`.
+     */
+    function findOwnConstructorReferences(classSymbol: Symbol, sourceFile: SourceFile, addNode: (node: Node) => void): void {
+        for (const decl of classSymbol.members.get("__constructor").declarations) {
+            const ctrKeyword = ts.findChildOfKind(decl, ts.SyntaxKind.ConstructorKeyword, sourceFile)!;
+            Debug.assert(decl.kind === SyntaxKind.Constructor && !!ctrKeyword);
+            addNode(ctrKeyword);
+        }
 
-                // If we got a type reference, try and see if the reference applies to any expressions that can implement an interface
-                const containingTypeReference = getContainingTypeReference(refNode);
-                if (containingTypeReference) {
-                    const parent = containingTypeReference.parent;
-                    if (isVariableLike(parent) && parent.type === containingTypeReference && parent.initializer && isImplementationExpression(parent.initializer)) {
-                        maybeAdd(getReferenceEntryFromNode(parent.initializer));
-                    }
-                    else if (isFunctionLike(parent) && parent.type === containingTypeReference && parent.body) {
-                        if (parent.body.kind === SyntaxKind.Block) {
-                            forEachReturnStatement(<Block>parent.body, returnStatement => {
-                                if (returnStatement.expression && isImplementationExpression(returnStatement.expression)) {
-                                    maybeAdd(getReferenceEntryFromNode(returnStatement.expression));
-                                }
-                            });
+        classSymbol.exports.forEach(member => {
+            const decl = member.valueDeclaration;
+            if (decl && decl.kind === SyntaxKind.MethodDeclaration) {
+                const body = (<MethodDeclaration>decl).body;
+                if (body) {
+                    forEachDescendantOfKind(body, SyntaxKind.ThisKeyword, thisKeyword => {
+                        if (isNewExpressionTarget(thisKeyword)) {
+                            addNode(thisKeyword);
                         }
-                        else if (isImplementationExpression(<Expression>parent.body)) {
-                            maybeAdd(getReferenceEntryFromNode(parent.body));
-                        }
-                    }
-                    else if (isAssertionExpression(parent) && isImplementationExpression(parent.expression)) {
-                        maybeAdd(getReferenceEntryFromNode(parent.expression));
-                    }
+                    });
                 }
             }
+        });
+    }
 
-            // Type nodes can contain multiple references to the same type. For example:
-            //      let x: Foo & (Foo & Bar) = ...
-            // Because we are returning the implementation locations and not the identifier locations,
-            // duplicate entries would be returned here as each of the type references is part of
-            // the same implementation. For that reason, check before we add a new entry
-            function maybeAdd(a: ReferenceEntry) {
-                if (!forEach(result, b => a.fileName === b.fileName && a.textSpan.start === b.textSpan.start && a.textSpan.length === b.textSpan.length)) {
-                    result.push(a);
-                }
-            }
+    /** Find references to `super` in the constructor of an extending class.  */
+    function findSuperConstructorAccesses(cls: ClassLikeDeclaration, addNode: (node: Node) => void): void {
+        const symbol = cls.symbol;
+        const ctr = symbol.members.get("__constructor");
+        if (!ctr) {
+            return;
         }
 
-        function getSymbolsForClassAndInterfaceComponents(type: UnionOrIntersectionType, result: Symbol[] = []): Symbol[] {
-            for (const componentType of type.types) {
-                if (componentType.symbol && componentType.symbol.getFlags() & (SymbolFlags.Class | SymbolFlags.Interface)) {
-                    result.push(componentType.symbol);
-                }
-                if (componentType.getFlags() & TypeFlags.UnionOrIntersection) {
-                    getSymbolsForClassAndInterfaceComponents(<UnionOrIntersectionType>componentType, result);
-                }
+        for (const decl of ctr.declarations) {
+            Debug.assert(decl.kind === SyntaxKind.Constructor);
+            const body = (<ConstructorDeclaration>decl).body;
+            if (body) {
+                forEachDescendantOfKind(body, SyntaxKind.SuperKeyword, node => {
+                    if (isCallExpressionTarget(node)) {
+                        addNode(node);
+                    }
+                });
             }
-            return result;
         }
+    }
 
-        function getContainingTypeReference(node: Node): Node {
-            let topLevelTypeReference: Node = undefined;
+    function addImplementationReferences(refNode: Node, addReference: (node: Node) => void, state: State): void {
+        // Check if we found a function/propertyAssignment/method with an implementation or initializer
+        if (isDeclarationName(refNode) && isImplementation(refNode.parent)) {
+            addReference(refNode.parent);
+            return;
+        }
+
+        if (refNode.kind !== SyntaxKind.Identifier) {
+            return;
+        }
+
+        if (refNode.parent.kind === SyntaxKind.ShorthandPropertyAssignment) {
+            // Go ahead and dereference the shorthand assignment by going to its definition
+            getReferenceEntriesForShorthandPropertyAssignment(refNode, state.checker, addReference);
+        }
+
+        // Check if the node is within an extends or implements clause
+        const containingClass = getContainingClassIfInHeritageClause(refNode);
+        if (containingClass) {
+            addReference(containingClass);
+            return;
+        }
 
-            while (node) {
-                if (isTypeNode(node)) {
-                    topLevelTypeReference = node;
+        // If we got a type reference, try and see if the reference applies to any expressions that can implement an interface
+        const containingTypeReference = getContainingTypeReference(refNode);
+        if (containingTypeReference && state.markSeenContainingTypeReference(containingTypeReference)) {
+            const parent = containingTypeReference.parent;
+            if (isVariableLike(parent) && parent.type === containingTypeReference && parent.initializer && isImplementationExpression(parent.initializer)) {
+                addReference(parent.initializer);
+            }
+            else if (isFunctionLike(parent) && parent.type === containingTypeReference && parent.body) {
+                if (parent.body.kind === SyntaxKind.Block) {
+                    forEachReturnStatement(<Block>parent.body, returnStatement => {
+                        if (returnStatement.expression && isImplementationExpression(returnStatement.expression)) {
+                            addReference(returnStatement.expression);
+                        }
+                    });
                 }
-                node = node.parent;
+                else if (isImplementationExpression(<Expression>parent.body)) {
+                    addReference(parent.body);
+                }
+            }
+            else if (isAssertionExpression(parent) && isImplementationExpression(parent.expression)) {
+                addReference(parent.expression);
             }
+        }
+    }
 
-            return topLevelTypeReference;
+    function getSymbolsForClassAndInterfaceComponents(type: UnionOrIntersectionType, result: Symbol[] = []): Symbol[] {
+        for (const componentType of type.types) {
+            if (componentType.symbol && componentType.symbol.getFlags() & (SymbolFlags.Class | SymbolFlags.Interface)) {
+                result.push(componentType.symbol);
+            }
+            if (componentType.getFlags() & TypeFlags.UnionOrIntersection) {
+                getSymbolsForClassAndInterfaceComponents(<UnionOrIntersectionType>componentType, result);
+            }
         }
+        return result;
+    }
 
-        function getContainingClassIfInHeritageClause(node: Node): ClassLikeDeclaration {
-            if (node && node.parent) {
-                if (node.kind === SyntaxKind.ExpressionWithTypeArguments
-                    && node.parent.kind === SyntaxKind.HeritageClause
-                    && isClassLike(node.parent.parent)) {
-                    return node.parent.parent;
-                }
+    function getContainingTypeReference(node: Node): Node {
+        let topLevelTypeReference: Node = undefined;
 
-                else if (node.kind === SyntaxKind.Identifier || node.kind === SyntaxKind.PropertyAccessExpression) {
-                    return getContainingClassIfInHeritageClause(node.parent);
-                }
+        while (node) {
+            if (isTypeNode(node)) {
+                topLevelTypeReference = node;
             }
-            return undefined;
+            node = node.parent;
         }
 
-        /**
-         * Returns true if this is an expression that can be considered an implementation
-         */
-        function isImplementationExpression(node: Expression): boolean {
-            // Unwrap parentheses
-            if (node.kind === SyntaxKind.ParenthesizedExpression) {
-                return isImplementationExpression((<ParenthesizedExpression>node).expression);
+        return topLevelTypeReference;
+    }
+
+    function getContainingClassIfInHeritageClause(node: Node): ClassLikeDeclaration {
+        if (node && node.parent) {
+            if (node.kind === SyntaxKind.ExpressionWithTypeArguments
+                && node.parent.kind === SyntaxKind.HeritageClause
+                && isClassLike(node.parent.parent)) {
+                return node.parent.parent;
             }
 
-            return node.kind === SyntaxKind.ArrowFunction ||
-                node.kind === SyntaxKind.FunctionExpression ||
-                node.kind === SyntaxKind.ObjectLiteralExpression ||
-                node.kind === SyntaxKind.ClassExpression ||
-                node.kind === SyntaxKind.ArrayLiteralExpression;
+            else if (node.kind === SyntaxKind.Identifier || node.kind === SyntaxKind.PropertyAccessExpression) {
+                return getContainingClassIfInHeritageClause(node.parent);
+            }
+        }
+        return undefined;
+    }
+
+    /**
+     * Returns true if this is an expression that can be considered an implementation
+     */
+    function isImplementationExpression(node: Expression): boolean {
+        switch (node.kind) {
+            case SyntaxKind.ParenthesizedExpression:
+                return isImplementationExpression((<ParenthesizedExpression>node).expression);
+            case SyntaxKind.ArrowFunction:
+            case SyntaxKind.FunctionExpression:
+            case SyntaxKind.ObjectLiteralExpression:
+            case SyntaxKind.ClassExpression:
+            case SyntaxKind.ArrayLiteralExpression:
+                return true;
+            default:
+                return false;
         }
+    }
 
-        /**
-         * Determines if the parent symbol occurs somewhere in the child's ancestry. If the parent symbol
-         * is an interface, determines if some ancestor of the child symbol extends or inherits from it.
-         * Also takes in a cache of previous results which makes this slightly more efficient and is
-         * necessary to avoid potential loops like so:
-         *     class A extends B { }
-         *     class B extends A { }
-         *
-         * We traverse the AST rather than using the type checker because users are typically only interested
-         * in explicit implementations of an interface/class when calling "Go to Implementation". Sibling
-         * implementations of types that share a common ancestor with the type whose implementation we are
-         * searching for need to be filtered out of the results. The type checker doesn't let us make the
-         * distinction between structurally compatible implementations and explicit implementations, so we
-         * must use the AST.
-         *
-         * @param child         A class or interface Symbol
-         * @param parent        Another class or interface Symbol
-         * @param cachedResults A map of symbol id pairs (i.e. "child,parent") to booleans indicating previous results
-         */
-        function explicitlyInheritsFrom(child: Symbol, parent: Symbol, cachedResults: Map<boolean>): boolean {
-            const parentIsInterface = parent.getFlags() & SymbolFlags.Interface;
-            return searchHierarchy(child);
+    /**
+     * Determines if the parent symbol occurs somewhere in the child's ancestry. If the parent symbol
+     * is an interface, determines if some ancestor of the child symbol extends or inherits from it.
+     * Also takes in a cache of previous results which makes this slightly more efficient and is
+     * necessary to avoid potential loops like so:
+     *     class A extends B { }
+     *     class B extends A { }
+     *
+     * We traverse the AST rather than using the type checker because users are typically only interested
+     * in explicit implementations of an interface/class when calling "Go to Implementation". Sibling
+     * implementations of types that share a common ancestor with the type whose implementation we are
+     * searching for need to be filtered out of the results. The type checker doesn't let us make the
+     * distinction between structurally compatible implementations and explicit implementations, so we
+     * must use the AST.
+     *
+     * @param child         A class or interface Symbol
+     * @param parent        Another class or interface Symbol
+     * @param cachedResults A map of symbol id pairs (i.e. "child,parent") to booleans indicating previous results
+     */
+    function explicitlyInheritsFrom(child: Symbol, parent: Symbol, cachedResults: Map<boolean>, checker: TypeChecker): boolean {
+        const parentIsInterface = parent.getFlags() & SymbolFlags.Interface;
+        return searchHierarchy(child);
 
-            function searchHierarchy(symbol: Symbol): boolean {
-                if (symbol === parent) {
-                    return true;
-                }
+        function searchHierarchy(symbol: Symbol): boolean {
+            if (symbol === parent) {
+                return true;
+            }
 
-                const key = getSymbolId(symbol) + "," + getSymbolId(parent);
-                if (key in cachedResults) {
-                    return cachedResults[key];
-                }
+            const key = getSymbolId(symbol) + "," + getSymbolId(parent);
+            const cached = cachedResults.get(key);
+            if (cached !== undefined) {
+                return cached;
+            }
 
-                // Set the key so that we don't infinitely recurse
-                cachedResults[key] = false;
-
-                const inherits = forEach(symbol.getDeclarations(), declaration => {
-                    if (isClassLike(declaration)) {
-                        if (parentIsInterface) {
-                            const interfaceReferences = getClassImplementsHeritageClauseElements(declaration);
-                            if (interfaceReferences) {
-                                for (const typeReference of interfaceReferences) {
-                                    if (searchTypeReference(typeReference)) {
-                                        return true;
-                                    }
+            // Set the key so that we don't infinitely recurse
+            cachedResults.set(key, false);
+
+            const inherits = forEach(symbol.getDeclarations(), declaration => {
+                if (isClassLike(declaration)) {
+                    if (parentIsInterface) {
+                        const interfaceReferences = getClassImplementsHeritageClauseElements(declaration);
+                        if (interfaceReferences) {
+                            for (const typeReference of interfaceReferences) {
+                                if (searchTypeReference(typeReference)) {
+                                    return true;
                                 }
                             }
                         }
-                        return searchTypeReference(getClassExtendsHeritageClauseElement(declaration));
-                    }
-                    else if (declaration.kind === SyntaxKind.InterfaceDeclaration) {
-                        if (parentIsInterface) {
-                            return forEach(getInterfaceBaseTypeNodes(<InterfaceDeclaration>declaration), searchTypeReference);
-                        }
                     }
-                    return false;
-                });
-
-                cachedResults[key] = inherits;
-                return inherits;
-            }
-
-            function searchTypeReference(typeReference: ExpressionWithTypeArguments): boolean {
-                if (typeReference) {
-                    const type = typeChecker.getTypeAtLocation(typeReference);
-                    if (type && type.symbol) {
-                        return searchHierarchy(type.symbol);
+                    return searchTypeReference(getClassExtendsHeritageClauseElement(declaration));
+                }
+                else if (declaration.kind === SyntaxKind.InterfaceDeclaration) {
+                    if (parentIsInterface) {
+                        return forEach(getInterfaceBaseTypeNodes(<InterfaceDeclaration>declaration), searchTypeReference);
                     }
                 }
                 return false;
-            }
+            });
+
+            cachedResults.set(key, inherits);
+            return inherits;
         }
 
-        function getReferencesForSuperKeyword(superKeyword: Node): ReferencedSymbol[] {
-            let searchSpaceNode = getSuperContainer(superKeyword, /*stopOnFunctions*/ false);
-            if (!searchSpaceNode) {
-                return undefined;
-            }
-            // Whether 'super' occurs in a static context within a class.
-            let staticFlag = ModifierFlags.Static;
-
-            switch (searchSpaceNode.kind) {
-                case SyntaxKind.PropertyDeclaration:
-                case SyntaxKind.PropertySignature:
-                case SyntaxKind.MethodDeclaration:
-                case SyntaxKind.MethodSignature:
-                case SyntaxKind.Constructor:
-                case SyntaxKind.GetAccessor:
-                case SyntaxKind.SetAccessor:
-                    staticFlag &= getModifierFlags(searchSpaceNode);
-                    searchSpaceNode = searchSpaceNode.parent; // re-assign to be the owning class
-                    break;
-                default:
-                    return undefined;
+        function searchTypeReference(typeReference: ExpressionWithTypeArguments): boolean {
+            if (typeReference) {
+                const type = checker.getTypeAtLocation(typeReference);
+                if (type && type.symbol) {
+                    return searchHierarchy(type.symbol);
+                }
             }
+            return false;
+        }
+    }
 
-            const references: ReferenceEntry[] = [];
+    function getReferencesForSuperKeyword(superKeyword: Node): SymbolAndEntries[] {
+        let searchSpaceNode = getSuperContainer(superKeyword, /*stopOnFunctions*/ false);
+        if (!searchSpaceNode) {
+            return undefined;
+        }
+        // Whether 'super' occurs in a static context within a class.
+        let staticFlag = ModifierFlags.Static;
 
-            const sourceFile = searchSpaceNode.getSourceFile();
-            const possiblePositions = getPossibleSymbolReferencePositions(sourceFile, "super", searchSpaceNode.getStart(), searchSpaceNode.getEnd());
-            forEach(possiblePositions, position => {
-                cancellationToken.throwIfCancellationRequested();
+        switch (searchSpaceNode.kind) {
+            case SyntaxKind.PropertyDeclaration:
+            case SyntaxKind.PropertySignature:
+            case SyntaxKind.MethodDeclaration:
+            case SyntaxKind.MethodSignature:
+            case SyntaxKind.Constructor:
+            case SyntaxKind.GetAccessor:
+            case SyntaxKind.SetAccessor:
+                staticFlag &= getModifierFlags(searchSpaceNode);
+                searchSpaceNode = searchSpaceNode.parent; // re-assign to be the owning class
+                break;
+            default:
+                return undefined;
+        }
 
-                const node = getTouchingWord(sourceFile, position);
+        const references: Entry[] = [];
 
-                if (!node || node.kind !== SyntaxKind.SuperKeyword) {
-                    return;
-                }
+        const sourceFile = searchSpaceNode.getSourceFile();
+        const possiblePositions = getPossibleSymbolReferencePositions(sourceFile, "super", searchSpaceNode);
+        for (const position of possiblePositions) {
+            const node = getTouchingWord(sourceFile, position, /*includeJsDocComment*/ false);
 
-                const container = getSuperContainer(node, /*stopOnFunctions*/ false);
+            if (!node || node.kind !== SyntaxKind.SuperKeyword) {
+                continue;
+            }
 
-                // If we have a 'super' container, we must have an enclosing class.
-                // Now make sure the owning class is the same as the search-space
-                // and has the same static qualifier as the original 'super's owner.
-                if (container && (ModifierFlags.Static & getModifierFlags(container)) === staticFlag && container.parent.symbol === searchSpaceNode.symbol) {
-                    references.push(getReferenceEntryFromNode(node));
-                }
-            });
+            const container = getSuperContainer(node, /*stopOnFunctions*/ false);
 
-            const definition = getDefinition(searchSpaceNode.symbol);
-            return [{ definition, references }];
+            // If we have a 'super' container, we must have an enclosing class.
+            // Now make sure the owning class is the same as the search-space
+            // and has the same static qualifier as the original 'super's owner.
+            if (container && (ModifierFlags.Static & getModifierFlags(container)) === staticFlag && container.parent.symbol === searchSpaceNode.symbol) {
+                references.push(nodeEntry(node));
+            }
         }
 
-        function getReferencesForThisKeyword(thisOrSuperKeyword: Node, sourceFiles: SourceFile[]): ReferencedSymbol[] {
-            let searchSpaceNode = getThisContainer(thisOrSuperKeyword, /* includeArrowFunctions */ false);
+        return [{ definition: { type: "symbol", symbol: searchSpaceNode.symbol, node: superKeyword }, references }];
+    }
 
-            // Whether 'this' occurs in a static context within a class.
-            let staticFlag = ModifierFlags.Static;
+    function getReferencesForThisKeyword(thisOrSuperKeyword: Node, sourceFiles: SourceFile[], cancellationToken: CancellationToken): SymbolAndEntries[] {
+        let searchSpaceNode = getThisContainer(thisOrSuperKeyword, /* includeArrowFunctions */ false);
 
-            switch (searchSpaceNode.kind) {
-                case SyntaxKind.MethodDeclaration:
-                case SyntaxKind.MethodSignature:
-                    if (isObjectLiteralMethod(searchSpaceNode)) {
-                        break;
-                    }
-                // fall through
-                case SyntaxKind.PropertyDeclaration:
-                case SyntaxKind.PropertySignature:
-                case SyntaxKind.Constructor:
-                case SyntaxKind.GetAccessor:
-                case SyntaxKind.SetAccessor:
-                    staticFlag &= getModifierFlags(searchSpaceNode);
-                    searchSpaceNode = searchSpaceNode.parent; // re-assign to be the owning class
-                    break;
-                case SyntaxKind.SourceFile:
-                    if (isExternalModule(<SourceFile>searchSpaceNode)) {
-                        return undefined;
-                    }
-                // Fall through
-                case SyntaxKind.FunctionDeclaration:
-                case SyntaxKind.FunctionExpression:
+        // Whether 'this' occurs in a static context within a class.
+        let staticFlag = ModifierFlags.Static;
+
+        switch (searchSpaceNode.kind) {
+            case SyntaxKind.MethodDeclaration:
+            case SyntaxKind.MethodSignature:
+                if (isObjectLiteralMethod(searchSpaceNode)) {
                     break;
-                // Computed properties in classes are not handled here because references to this are illegal,
-                // so there is no point finding references to them.
-                default:
+                }
+                // falls through
+            case SyntaxKind.PropertyDeclaration:
+            case SyntaxKind.PropertySignature:
+            case SyntaxKind.Constructor:
+            case SyntaxKind.GetAccessor:
+            case SyntaxKind.SetAccessor:
+                staticFlag &= getModifierFlags(searchSpaceNode);
+                searchSpaceNode = searchSpaceNode.parent; // re-assign to be the owning class
+                break;
+            case SyntaxKind.SourceFile:
+                if (isExternalModule(<SourceFile>searchSpaceNode)) {
                     return undefined;
-            }
-
-            const references: ReferenceEntry[] = [];
-
-            let possiblePositions: number[];
-            if (searchSpaceNode.kind === SyntaxKind.SourceFile) {
-                forEach(sourceFiles, sourceFile => {
-                    possiblePositions = getPossibleSymbolReferencePositions(sourceFile, "this", sourceFile.getStart(), sourceFile.getEnd());
-                    getThisReferencesInFile(sourceFile, sourceFile, possiblePositions, references);
-                });
-            }
-            else {
-                const sourceFile = searchSpaceNode.getSourceFile();
-                possiblePositions = getPossibleSymbolReferencePositions(sourceFile, "this", searchSpaceNode.getStart(), searchSpaceNode.getEnd());
-                getThisReferencesInFile(sourceFile, searchSpaceNode, possiblePositions, references);
-            }
-
-            const thisOrSuperSymbol = typeChecker.getSymbolAtLocation(thisOrSuperKeyword);
-
-            const displayParts = thisOrSuperSymbol && SymbolDisplay.getSymbolDisplayPartsDocumentationAndSymbolKind(
-                typeChecker, thisOrSuperSymbol, thisOrSuperKeyword.getSourceFile(), getContainerNode(thisOrSuperKeyword), thisOrSuperKeyword).displayParts;
-
-            return [{
-                definition: {
-                    containerKind: "",
-                    containerName: "",
-                    fileName: node.getSourceFile().fileName,
-                    kind: ScriptElementKind.variableElement,
-                    name: "this",
-                    textSpan: createTextSpanFromBounds(node.getStart(), node.getEnd()),
-                    displayParts
-                },
-                references: references
-            }];
-
-            function getThisReferencesInFile(sourceFile: SourceFile, searchSpaceNode: Node, possiblePositions: number[], result: ReferenceEntry[]): void {
-                forEach(possiblePositions, position => {
-                    cancellationToken.throwIfCancellationRequested();
-
-                    const node = getTouchingWord(sourceFile, position);
-                    if (!node || !isThis(node)) {
-                        return;
-                    }
+                }
+                // falls through
+            case SyntaxKind.FunctionDeclaration:
+            case SyntaxKind.FunctionExpression:
+                break;
+            // Computed properties in classes are not handled here because references to this are illegal,
+            // so there is no point finding references to them.
+            default:
+                return undefined;
+        }
 
-                    const container = getThisContainer(node, /* includeArrowFunctions */ false);
+        const references: Entry[] = [];
 
-                    switch (searchSpaceNode.kind) {
-                        case SyntaxKind.FunctionExpression:
-                        case SyntaxKind.FunctionDeclaration:
-                            if (searchSpaceNode.symbol === container.symbol) {
-                                result.push(getReferenceEntryFromNode(node));
-                            }
-                            break;
-                        case SyntaxKind.MethodDeclaration:
-                        case SyntaxKind.MethodSignature:
-                            if (isObjectLiteralMethod(searchSpaceNode) && searchSpaceNode.symbol === container.symbol) {
-                                result.push(getReferenceEntryFromNode(node));
-                            }
-                            break;
-                        case SyntaxKind.ClassExpression:
-                        case SyntaxKind.ClassDeclaration:
-                            // Make sure the container belongs to the same class
-                            // and has the appropriate static modifier from the original container.
-                            if (container.parent && searchSpaceNode.symbol === container.parent.symbol && (getModifierFlags(container) & ModifierFlags.Static) === staticFlag) {
-                                result.push(getReferenceEntryFromNode(node));
-                            }
-                            break;
-                        case SyntaxKind.SourceFile:
-                            if (container.kind === SyntaxKind.SourceFile && !isExternalModule(<SourceFile>container)) {
-                                result.push(getReferenceEntryFromNode(node));
-                            }
-                            break;
-                    }
-                });
-            }
+        let possiblePositions: number[];
+        if (searchSpaceNode.kind === SyntaxKind.SourceFile) {
+            forEach(sourceFiles, sourceFile => {
+                cancellationToken.throwIfCancellationRequested();
+                possiblePositions = getPossibleSymbolReferencePositions(sourceFile, "this");
+                getThisReferencesInFile(sourceFile, sourceFile, possiblePositions, references);
+            });
         }
+        else {
+            const sourceFile = searchSpaceNode.getSourceFile();
+            possiblePositions = getPossibleSymbolReferencePositions(sourceFile, "this", searchSpaceNode);
+            getThisReferencesInFile(sourceFile, searchSpaceNode, possiblePositions, references);
+        }
+
+        return [{
+            definition: { type: "this", node: thisOrSuperKeyword },
+            references
+        }];
 
+        function getThisReferencesInFile(sourceFile: SourceFile, searchSpaceNode: Node, possiblePositions: number[], result: Entry[]): void {
+            forEach(possiblePositions, position => {
+                const node = getTouchingWord(sourceFile, position, /*includeJsDocComment*/ false);
+                if (!node || !isThis(node)) {
+                    return;
+                }
 
-        function getReferencesForStringLiteral(node: StringLiteral, sourceFiles: SourceFile[]): ReferencedSymbol[] {
-            const type = getStringLiteralTypeForNode(node, typeChecker);
+                const container = getThisContainer(node, /* includeArrowFunctions */ false);
 
-            if (!type) {
-                // nothing to do here. moving on
-                return undefined;
-            }
+                switch (searchSpaceNode.kind) {
+                    case SyntaxKind.FunctionExpression:
+                    case SyntaxKind.FunctionDeclaration:
+                        if (searchSpaceNode.symbol === container.symbol) {
+                            result.push(nodeEntry(node));
+                        }
+                        break;
+                    case SyntaxKind.MethodDeclaration:
+                    case SyntaxKind.MethodSignature:
+                        if (isObjectLiteralMethod(searchSpaceNode) && searchSpaceNode.symbol === container.symbol) {
+                            result.push(nodeEntry(node));
+                        }
+                        break;
+                    case SyntaxKind.ClassExpression:
+                    case SyntaxKind.ClassDeclaration:
+                        // Make sure the container belongs to the same class
+                        // and has the appropriate static modifier from the original container.
+                        if (container.parent && searchSpaceNode.symbol === container.parent.symbol && (getModifierFlags(container) & ModifierFlags.Static) === staticFlag) {
+                            result.push(nodeEntry(node));
+                        }
+                        break;
+                    case SyntaxKind.SourceFile:
+                        if (container.kind === SyntaxKind.SourceFile && !isExternalModule(<SourceFile>container)) {
+                            result.push(nodeEntry(node));
+                        }
+                        break;
+                }
+            });
+        }
+    }
 
-            const references: ReferenceEntry[] = [];
+    function getReferencesForStringLiteral(node: StringLiteral, sourceFiles: SourceFile[], cancellationToken: CancellationToken): SymbolAndEntries[] {
+        const references: NodeEntry[] = [];
 
-            for (const sourceFile of sourceFiles) {
-                const possiblePositions = getPossibleSymbolReferencePositions(sourceFile, type.text, sourceFile.getStart(), sourceFile.getEnd());
-                getReferencesForStringLiteralInFile(sourceFile, type, possiblePositions, references);
-            }
+        for (const sourceFile of sourceFiles) {
+            cancellationToken.throwIfCancellationRequested();
+            const possiblePositions = getPossibleSymbolReferencePositions(sourceFile, node.text);
+            getReferencesForStringLiteralInFile(sourceFile, node.text, possiblePositions, references);
+        }
 
-            return [{
-                definition: {
-                    containerKind: "",
-                    containerName: "",
-                    fileName: node.getSourceFile().fileName,
-                    kind: ScriptElementKind.variableElement,
-                    name: type.text,
-                    textSpan: createTextSpanFromBounds(node.getStart(), node.getEnd()),
-                    displayParts: [displayPart(getTextOfNode(node), SymbolDisplayPartKind.stringLiteral)]
-                },
-                references: references
-            }];
-
-            function getReferencesForStringLiteralInFile(sourceFile: SourceFile, searchType: Type, possiblePositions: number[], references: ReferenceEntry[]): void {
-                for (const position of possiblePositions) {
-                    cancellationToken.throwIfCancellationRequested();
-
-                    const node = getTouchingWord(sourceFile, position);
-                    if (!node || node.kind !== SyntaxKind.StringLiteral) {
-                        return;
-                    }
+        return [{
+            definition: { type: "string", node },
+            references
+        }];
 
-                    const type = getStringLiteralTypeForNode(<StringLiteral>node, typeChecker);
-                    if (type === searchType) {
-                        references.push(getReferenceEntryFromNode(node));
-                    }
+        function getReferencesForStringLiteralInFile(sourceFile: SourceFile, searchText: string, possiblePositions: number[], references: Push<NodeEntry>): void {
+            for (const position of possiblePositions) {
+                const node = getTouchingWord(sourceFile, position, /*includeJsDocComment*/ false);
+                if (node && node.kind === SyntaxKind.StringLiteral && (node as StringLiteral).text === searchText) {
+                    references.push(nodeEntry(node, /*isInString*/ true));
                 }
             }
         }
+    }
 
-        function populateSearchSymbolSet(symbol: Symbol, location: Node): Symbol[] {
-            // The search set contains at least the current symbol
-            let result = [symbol];
+    // For certain symbol kinds, we need to include other symbols in the search set.
+    // This is not needed when searching for re-exports.
+    function populateSearchSymbolSet(symbol: Symbol, location: Node, checker: TypeChecker, implementations: boolean): Symbol[] {
+        // The search set contains at least the current symbol
+        const result = [symbol];
 
+        const containingObjectLiteralElement = getContainingObjectLiteralElement(location);
+        if (containingObjectLiteralElement) {
             // If the location is name of property symbol from object literal destructuring pattern
             // Search the property symbol
             //      for ( { property: p2 } of elems) { }
-            const containingObjectLiteralElement = getContainingObjectLiteralElement(location);
-            if (containingObjectLiteralElement && containingObjectLiteralElement.kind !== SyntaxKind.ShorthandPropertyAssignment) {
-                const propertySymbol = getPropertySymbolOfDestructuringAssignment(location);
+            if (containingObjectLiteralElement.kind !== SyntaxKind.ShorthandPropertyAssignment) {
+                const propertySymbol = getPropertySymbolOfDestructuringAssignment(location, checker);
                 if (propertySymbol) {
                     result.push(propertySymbol);
                 }
             }
 
-            // If the symbol is an alias, add what it aliases to the list
-            //     import {a} from "mod";
-            //     export {a}
-            // If the symbol is an alias to default declaration, add what it aliases to the list
-            //     declare "mod" { export default class B { } }
-            //     import B from "mod";
-            //// For export specifiers, the exported name can be referring to a local symbol, e.g.:
-            ////     import {a} from "mod";
-            ////     export {a as somethingElse}
-            //// We want the *local* declaration of 'a' as declared in the import,
-            //// *not* as declared within "mod" (or farther)
-            const aliasSymbol = getAliasSymbolForPropertyNameSymbol(symbol, location);
-            if (aliasSymbol) {
-                result = result.concat(populateSearchSymbolSet(aliasSymbol, location));
-            }
-
             // If the location is in a context sensitive location (i.e. in an object literal) try
             // to get a contextual type for it, and add the property symbol from the contextual
             // type to the search set
-            if (containingObjectLiteralElement) {
-                forEach(getPropertySymbolsFromContextualType(containingObjectLiteralElement), contextualSymbol => {
-                    addRange(result, typeChecker.getRootSymbols(contextualSymbol));
-                });
-
-                /* Because in short-hand property assignment, location has two meaning : property name and as value of the property
-                    * When we do findAllReference at the position of the short-hand property assignment, we would want to have references to position of
-                    * property name and variable declaration of the identifier.
-                    * Like in below example, when querying for all references for an identifier 'name', of the property assignment, the language service
-                    * should show both 'name' in 'obj' and 'name' in variable declaration
-                    *      const name = "Foo";
-                    *      const obj = { name };
-                    * In order to do that, we will populate the search set with the value symbol of the identifier as a value of the property assignment
-                    * so that when matching with potential reference symbol, both symbols from property declaration and variable declaration
-                    * will be included correctly.
-                    */
-                const shorthandValueSymbol = typeChecker.getShorthandAssignmentValueSymbol(location.parent);
-                if (shorthandValueSymbol) {
-                    result.push(shorthandValueSymbol);
-                }
-            }
-
-            // If the symbol.valueDeclaration is a property parameter declaration,
-            // we should include both parameter declaration symbol and property declaration symbol
-            // Parameter Declaration symbol is only visible within function scope, so the symbol is stored in constructor.locals.
-            // Property Declaration symbol is a member of the class, so the symbol is stored in its class Declaration.symbol.members
-            if (symbol.valueDeclaration && symbol.valueDeclaration.kind === SyntaxKind.Parameter &&
-                isParameterPropertyDeclaration(<ParameterDeclaration>symbol.valueDeclaration)) {
-                result = result.concat(typeChecker.getSymbolsOfParameterPropertyDeclaration(<ParameterDeclaration>symbol.valueDeclaration, symbol.name));
-            }
+            forEach(getPropertySymbolsFromContextualType(containingObjectLiteralElement, checker), contextualSymbol => {
+                addRange(result, checker.getRootSymbols(contextualSymbol));
+            });
 
-            // If this is symbol of binding element without propertyName declaration in Object binding pattern
-            // Include the property in the search
-            const bindingElementPropertySymbol = getPropertySymbolOfObjectBindingPatternWithoutPropertyName(symbol);
-            if (bindingElementPropertySymbol) {
-                result.push(bindingElementPropertySymbol);
+            /* Because in short-hand property assignment, location has two meaning : property name and as value of the property
+             * When we do findAllReference at the position of the short-hand property assignment, we would want to have references to position of
+             * property name and variable declaration of the identifier.
+             * Like in below example, when querying for all references for an identifier 'name', of the property assignment, the language service
+             * should show both 'name' in 'obj' and 'name' in variable declaration
+             *      const name = "Foo";
+             *      const obj = { name };
+             * In order to do that, we will populate the search set with the value symbol of the identifier as a value of the property assignment
+             * so that when matching with potential reference symbol, both symbols from property declaration and variable declaration
+             * will be included correctly.
+             */
+            const shorthandValueSymbol = checker.getShorthandAssignmentValueSymbol(location.parent);
+            if (shorthandValueSymbol) {
+                result.push(shorthandValueSymbol);
             }
+        }
 
-            // If this is a union property, add all the symbols from all its source symbols in all unioned types.
-            // If the symbol is an instantiation from a another symbol (e.g. widened symbol) , add the root the list
-            forEach(typeChecker.getRootSymbols(symbol), rootSymbol => {
-                if (rootSymbol !== symbol) {
-                    result.push(rootSymbol);
-                }
-
-                // Add symbol of properties/methods of the same name in base classes and implemented interfaces definitions
-                if (!implementations && rootSymbol.parent && rootSymbol.parent.flags & (SymbolFlags.Class | SymbolFlags.Interface)) {
-                    getPropertySymbolsFromBaseTypes(rootSymbol.parent, rootSymbol.getName(), result, /*previousIterationSymbolsCache*/ createMap<Symbol>());
-                }
-            });
+        // If the symbol.valueDeclaration is a property parameter declaration,
+        // we should include both parameter declaration symbol and property declaration symbol
+        // Parameter Declaration symbol is only visible within function scope, so the symbol is stored in constructor.locals.
+        // Property Declaration symbol is a member of the class, so the symbol is stored in its class Declaration.symbol.members
+        if (symbol.valueDeclaration && symbol.valueDeclaration.kind === SyntaxKind.Parameter &&
+            isParameterPropertyDeclaration(<ParameterDeclaration>symbol.valueDeclaration)) {
+            addRange(result, checker.getSymbolsOfParameterPropertyDeclaration(<ParameterDeclaration>symbol.valueDeclaration, symbol.name));
+        }
 
-            return result;
+        // If this is symbol of binding element without propertyName declaration in Object binding pattern
+        // Include the property in the search
+        const bindingElementPropertySymbol = getPropertySymbolOfObjectBindingPatternWithoutPropertyName(symbol, checker);
+        if (bindingElementPropertySymbol) {
+            result.push(bindingElementPropertySymbol);
         }
 
-        /**
-         * Find symbol of the given property-name and add the symbol to the given result array
-         * @param symbol a symbol to start searching for the given propertyName
-         * @param propertyName a name of property to search for
-         * @param result an array of symbol of found property symbols
-         * @param previousIterationSymbolsCache a cache of symbol from previous iterations of calling this function to prevent infinite revisiting of the same symbol.
-         *                                The value of previousIterationSymbol is undefined when the function is first called.
-         */
-        function getPropertySymbolsFromBaseTypes(symbol: Symbol, propertyName: string, result: Symbol[],
-            previousIterationSymbolsCache: SymbolTable): void {
-            if (!symbol) {
-                return;
+        // If this is a union property, add all the symbols from all its source symbols in all unioned types.
+        // If the symbol is an instantiation from a another symbol (e.g. widened symbol) , add the root the list
+        for (const rootSymbol of checker.getRootSymbols(symbol)) {
+            if (rootSymbol !== symbol) {
+                result.push(rootSymbol);
             }
 
-            // If the current symbol is the same as the previous-iteration symbol, we can just return the symbol that has already been visited
-            // This is particularly important for the following cases, so that we do not infinitely visit the same symbol.
-            // For example:
-            //      interface C extends C {
-            //          /*findRef*/propName: string;
-            //      }
-            // The first time getPropertySymbolsFromBaseTypes is called when finding-all-references at propName,
-            // the symbol argument will be the symbol of an interface "C" and previousIterationSymbol is undefined,
-            // the function will add any found symbol of the property-name, then its sub-routine will call
-            // getPropertySymbolsFromBaseTypes again to walk up any base types to prevent revisiting already
-            // visited symbol, interface "C", the sub-routine will pass the current symbol as previousIterationSymbol.
-            if (symbol.name in previousIterationSymbolsCache) {
-                return;
+            // Add symbol of properties/methods of the same name in base classes and implemented interfaces definitions
+            if (!implementations && rootSymbol.parent && rootSymbol.parent.flags & (SymbolFlags.Class | SymbolFlags.Interface)) {
+                getPropertySymbolsFromBaseTypes(rootSymbol.parent, rootSymbol.getName(), result, /*previousIterationSymbolsCache*/ createMap<Symbol>(), checker);
             }
+        }
 
-            if (symbol.flags & (SymbolFlags.Class | SymbolFlags.Interface)) {
-                forEach(symbol.getDeclarations(), declaration => {
-                    if (isClassLike(declaration)) {
-                        getPropertySymbolFromTypeReference(getClassExtendsHeritageClauseElement(<ClassDeclaration>declaration));
-                        forEach(getClassImplementsHeritageClauseElements(<ClassDeclaration>declaration), getPropertySymbolFromTypeReference);
-                    }
-                    else if (declaration.kind === SyntaxKind.InterfaceDeclaration) {
-                        forEach(getInterfaceBaseTypeNodes(<InterfaceDeclaration>declaration), getPropertySymbolFromTypeReference);
-                    }
-                });
-            }
+        return result;
+    }
+
+    /**
+     * Find symbol of the given property-name and add the symbol to the given result array
+     * @param symbol a symbol to start searching for the given propertyName
+     * @param propertyName a name of property to search for
+     * @param result an array of symbol of found property symbols
+     * @param previousIterationSymbolsCache a cache of symbol from previous iterations of calling this function to prevent infinite revisiting of the same symbol.
+     *                                The value of previousIterationSymbol is undefined when the function is first called.
+     */
+    function getPropertySymbolsFromBaseTypes(symbol: Symbol, propertyName: string, result: Symbol[], previousIterationSymbolsCache: SymbolTable, checker: TypeChecker): void {
+        if (!symbol) {
             return;
+        }
 
-            function getPropertySymbolFromTypeReference(typeReference: ExpressionWithTypeArguments) {
-                if (typeReference) {
-                    const type = typeChecker.getTypeAtLocation(typeReference);
-                    if (type) {
-                        const propertySymbol = typeChecker.getPropertyOfType(type, propertyName);
-                        if (propertySymbol) {
-                            result.push(...typeChecker.getRootSymbols(propertySymbol));
-                        }
+        // If the current symbol is the same as the previous-iteration symbol, we can just return the symbol that has already been visited
+        // This is particularly important for the following cases, so that we do not infinitely visit the same symbol.
+        // For example:
+        //      interface C extends C {
+        //          /*findRef*/propName: string;
+        //      }
+        // The first time getPropertySymbolsFromBaseTypes is called when finding-all-references at propName,
+        // the symbol argument will be the symbol of an interface "C" and previousIterationSymbol is undefined,
+        // the function will add any found symbol of the property-name, then its sub-routine will call
+        // getPropertySymbolsFromBaseTypes again to walk up any base types to prevent revisiting already
+        // visited symbol, interface "C", the sub-routine will pass the current symbol as previousIterationSymbol.
+        if (previousIterationSymbolsCache.has(symbol.name)) {
+            return;
+        }
 
-                        // Visit the typeReference as well to see if it directly or indirectly use that property
-                        previousIterationSymbolsCache[symbol.name] = symbol;
-                        getPropertySymbolsFromBaseTypes(type.symbol, propertyName, result, previousIterationSymbolsCache);
-                    }
+        if (symbol.flags & (SymbolFlags.Class | SymbolFlags.Interface)) {
+            forEach(symbol.getDeclarations(), declaration => {
+                if (isClassLike(declaration)) {
+                    getPropertySymbolFromTypeReference(getClassExtendsHeritageClauseElement(<ClassDeclaration>declaration));
+                    forEach(getClassImplementsHeritageClauseElements(<ClassDeclaration>declaration), getPropertySymbolFromTypeReference);
                 }
-            }
+                else if (declaration.kind === SyntaxKind.InterfaceDeclaration) {
+                    forEach(getInterfaceBaseTypeNodes(<InterfaceDeclaration>declaration), getPropertySymbolFromTypeReference);
+                }
+            });
         }
+        return;
+
+        function getPropertySymbolFromTypeReference(typeReference: ExpressionWithTypeArguments): void {
+            if (typeReference) {
+                const type = checker.getTypeAtLocation(typeReference);
+                if (type) {
+                    const propertySymbol = checker.getPropertyOfType(type, propertyName);
+                    if (propertySymbol) {
+                        result.push(...checker.getRootSymbols(propertySymbol));
+                    }
 
-        function getRelatedSymbol(searchSymbols: Symbol[], referenceSymbol: Symbol, referenceLocation: Node, searchLocationIsConstructor: boolean, parents: Symbol[] | undefined, cache: Map<boolean>): Symbol {
-            if (contains(searchSymbols, referenceSymbol)) {
-                // If we are searching for constructor uses, they must be 'new' expressions.
-                return (!searchLocationIsConstructor || isNewExpressionTarget(referenceLocation)) && referenceSymbol;
-            }
-
-            // If the reference symbol is an alias, check if what it is aliasing is one of the search
-            // symbols but by looking up for related symbol of this alias so it can handle multiple level of indirectness.
-            const aliasSymbol = getAliasSymbolForPropertyNameSymbol(referenceSymbol, referenceLocation);
-            if (aliasSymbol) {
-                return getRelatedSymbol(searchSymbols, aliasSymbol, referenceLocation, searchLocationIsConstructor, parents, cache);
+                    // Visit the typeReference as well to see if it directly or indirectly use that property
+                    previousIterationSymbolsCache.set(symbol.name, symbol);
+                    getPropertySymbolsFromBaseTypes(type.symbol, propertyName, result, previousIterationSymbolsCache, checker);
+                }
             }
+        }
+    }
 
-            // If the reference location is in an object literal, try to get the contextual type for the
-            // object literal, lookup the property symbol in the contextual type, and use this symbol to
-            // compare to our searchSymbol
-            const containingObjectLiteralElement = getContainingObjectLiteralElement(referenceLocation);
-            if (containingObjectLiteralElement) {
-                const contextualSymbol = forEach(getPropertySymbolsFromContextualType(containingObjectLiteralElement), contextualSymbol => {
-                    return forEach(typeChecker.getRootSymbols(contextualSymbol), s => searchSymbols.indexOf(s) >= 0 ? s : undefined);
-                });
+    function getRelatedSymbol(search: Search, referenceSymbol: Symbol, referenceLocation: Node, state: State): Symbol | undefined {
+        if (search.includes(referenceSymbol)) {
+            return referenceSymbol;
+        }
 
-                if (contextualSymbol) {
-                    return contextualSymbol;
-                }
+        // If the reference location is in an object literal, try to get the contextual type for the
+        // object literal, lookup the property symbol in the contextual type, and use this symbol to
+        // compare to our searchSymbol
+        const containingObjectLiteralElement = getContainingObjectLiteralElement(referenceLocation);
+        if (containingObjectLiteralElement) {
+            const contextualSymbol = forEach(getPropertySymbolsFromContextualType(containingObjectLiteralElement, state.checker), contextualSymbol =>
+                find(state.checker.getRootSymbols(contextualSymbol), search.includes));
 
-                // If the reference location is the name of property from object literal destructuring pattern
-                // Get the property symbol from the object literal's type and look if thats the search symbol
-                // In below eg. get 'property' from type of elems iterating type
-                //      for ( { property: p2 } of elems) { }
-                const propertySymbol = getPropertySymbolOfDestructuringAssignment(referenceLocation);
-                if (propertySymbol && searchSymbols.indexOf(propertySymbol) >= 0) {
-                    return propertySymbol;
-                }
+            if (contextualSymbol) {
+                return contextualSymbol;
             }
 
-            // If the reference location is the binding element and doesn't have property name
-            // then include the binding element in the related symbols
-            //      let { a } : { a };
-            const bindingElementPropertySymbol = getPropertySymbolOfObjectBindingPatternWithoutPropertyName(referenceSymbol);
-            if (bindingElementPropertySymbol && searchSymbols.indexOf(bindingElementPropertySymbol) >= 0) {
-                return bindingElementPropertySymbol;
+            // If the reference location is the name of property from object literal destructuring pattern
+            // Get the property symbol from the object literal's type and look if thats the search symbol
+            // In below eg. get 'property' from type of elems iterating type
+            //      for ( { property: p2 } of elems) { }
+            const propertySymbol = getPropertySymbolOfDestructuringAssignment(referenceLocation, state.checker);
+            if (propertySymbol && search.includes(propertySymbol)) {
+                return propertySymbol;
             }
+        }
 
-            // Unwrap symbols to get to the root (e.g. transient symbols as a result of widening)
-            // Or a union property, use its underlying unioned symbols
-            return forEach(typeChecker.getRootSymbols(referenceSymbol), rootSymbol => {
-                // if it is in the list, then we are done
-                if (searchSymbols.indexOf(rootSymbol) >= 0) {
-                    return rootSymbol;
-                }
+        // If the reference location is the binding element and doesn't have property name
+        // then include the binding element in the related symbols
+        //      let { a } : { a };
+        const bindingElementPropertySymbol = getPropertySymbolOfObjectBindingPatternWithoutPropertyName(referenceSymbol, state.checker);
+        if (bindingElementPropertySymbol && search.includes(bindingElementPropertySymbol)) {
+            return bindingElementPropertySymbol;
+        }
 
-                // Finally, try all properties with the same name in any type the containing type extended or implemented, and
-                // see if any is in the list. If we were passed a parent symbol, only include types that are subtypes of the
-                // parent symbol
-                if (rootSymbol.parent && rootSymbol.parent.flags & (SymbolFlags.Class | SymbolFlags.Interface)) {
-                    // Parents will only be defined if implementations is true
-                    if (parents) {
-                        if (!forEach(parents, parent => explicitlyInheritsFrom(rootSymbol.parent, parent, cache))) {
-                            return undefined;
-                        }
-                    }
+        // Unwrap symbols to get to the root (e.g. transient symbols as a result of widening)
+        // Or a union property, use its underlying unioned symbols
+        return forEach(state.checker.getRootSymbols(referenceSymbol), rootSymbol => {
+            // if it is in the list, then we are done
+            if (search.includes(rootSymbol)) {
+                return rootSymbol;
+            }
 
-                    const result: Symbol[] = [];
-                    getPropertySymbolsFromBaseTypes(rootSymbol.parent, rootSymbol.getName(), result, /*previousIterationSymbolsCache*/ createMap<Symbol>());
-                    return forEach(result, s => searchSymbols.indexOf(s) >= 0 ? s : undefined);
+            // Finally, try all properties with the same name in any type the containing type extended or implemented, and
+            // see if any is in the list. If we were passed a parent symbol, only include types that are subtypes of the
+            // parent symbol
+            if (rootSymbol.parent && rootSymbol.parent.flags & (SymbolFlags.Class | SymbolFlags.Interface)) {
+                // Parents will only be defined if implementations is true
+                if (search.parents && !some(search.parents, parent => explicitlyInheritsFrom(rootSymbol.parent, parent, state.inheritsFromCache, state.checker))) {
+                    return undefined;
                 }
 
-                return undefined;
-            });
-        }
-
-        function getNameFromObjectLiteralElement(node: ObjectLiteralElement) {
-            if (node.name.kind === SyntaxKind.ComputedPropertyName) {
-                const nameExpression = (<ComputedPropertyName>node.name).expression;
-                // treat computed property names where expression is string/numeric literal as just string/numeric literal
-                if (isStringOrNumericLiteral(nameExpression.kind)) {
-                    return (<LiteralExpression>nameExpression).text;
-                }
-                return undefined;
+                const result: Symbol[] = [];
+                getPropertySymbolsFromBaseTypes(rootSymbol.parent, rootSymbol.getName(), result, /*previousIterationSymbolsCache*/ createMap<Symbol>(), state.checker);
+                return find(result, search.includes);
             }
-            return (<Identifier | LiteralExpression>node.name).text;
-        }
 
-        function getPropertySymbolsFromContextualType(node: ObjectLiteralElement): Symbol[] {
-            const objectLiteral = <ObjectLiteralExpression>node.parent;
-            const contextualType = typeChecker.getContextualType(objectLiteral);
-            const name = getNameFromObjectLiteralElement(node);
-            if (name && contextualType) {
-                const result: Symbol[] = [];
-                const symbol = contextualType.getProperty(name);
-                if (symbol) {
-                    result.push(symbol);
-                }
+            return undefined;
+        });
+    }
 
-                if (contextualType.flags & TypeFlags.Union) {
-                    forEach((<UnionType>contextualType).types, t => {
-                        const symbol = t.getProperty(name);
-                        if (symbol) {
-                            result.push(symbol);
-                        }
-                    });
-                }
-                return result;
+    function getNameFromObjectLiteralElement(node: ObjectLiteralElement): string {
+        if (node.name.kind === SyntaxKind.ComputedPropertyName) {
+            const nameExpression = (<ComputedPropertyName>node.name).expression;
+            // treat computed property names where expression is string/numeric literal as just string/numeric literal
+            if (isStringOrNumericLiteral(nameExpression)) {
+                return (<LiteralExpression>nameExpression).text;
             }
             return undefined;
         }
+        return (<Identifier | LiteralExpression>node.name).text;
+    }
 
-        /** Given an initial searchMeaning, extracted from a location, widen the search scope based on the declarations
-             * of the corresponding symbol. e.g. if we are searching for "Foo" in value position, but "Foo" references a class
-            * then we need to widen the search to include type positions as well.
-            * On the contrary, if we are searching for "Bar" in type position and we trace bar to an interface, and an uninstantiated
-            * module, we want to keep the search limited to only types, as the two declarations (interface and uninstantiated module)
-            * do not intersect in any of the three spaces.
-            */
-        function getIntersectingMeaningFromDeclarations(meaning: SemanticMeaning, declarations: Declaration[]): SemanticMeaning {
-            if (declarations) {
-                let lastIterationMeaning: SemanticMeaning;
-                do {
-                    // The result is order-sensitive, for instance if initialMeaning === Namespace, and declarations = [class, instantiated module]
-                    // we need to consider both as they initialMeaning intersects with the module in the namespace space, and the module
-                    // intersects with the class in the value space.
-                    // To achieve that we will keep iterating until the result stabilizes.
-
-                    // Remember the last meaning
-                    lastIterationMeaning = meaning;
-
-                    for (const declaration of declarations) {
-                        const declarationMeaning = getMeaningFromDeclaration(declaration);
-
-                        if (declarationMeaning & meaning) {
-                            meaning |= declarationMeaning;
-                        }
+    /** Gets all symbols for one property. Does not get symbols for every property. */
+    function getPropertySymbolsFromContextualType(node: ObjectLiteralElement, checker: TypeChecker): Symbol[] | undefined {
+        const objectLiteral = <ObjectLiteralExpression>node.parent;
+        const contextualType = checker.getContextualType(objectLiteral);
+        const name = getNameFromObjectLiteralElement(node);
+        if (name && contextualType) {
+            const result: Symbol[] = [];
+            const symbol = contextualType.getProperty(name);
+            if (symbol) {
+                result.push(symbol);
+            }
+
+            if (contextualType.flags & TypeFlags.Union) {
+                forEach((<UnionType>contextualType).types, t => {
+                    const symbol = t.getProperty(name);
+                    if (symbol) {
+                        result.push(symbol);
                     }
-                }
-                while (meaning !== lastIterationMeaning);
+                });
             }
-            return meaning;
+            return result;
         }
+        return undefined;
     }
 
-    export function convertReferences(referenceSymbols: ReferencedSymbol[]): ReferenceEntry[] {
-        if (!referenceSymbols) {
-            return undefined;
-        }
+    /**
+     * Given an initial searchMeaning, extracted from a location, widen the search scope based on the declarations
+     * of the corresponding symbol. e.g. if we are searching for "Foo" in value position, but "Foo" references a class
+     * then we need to widen the search to include type positions as well.
+     * On the contrary, if we are searching for "Bar" in type position and we trace bar to an interface, and an uninstantiated
+     * module, we want to keep the search limited to only types, as the two declarations (interface and uninstantiated module)
+     * do not intersect in any of the three spaces.
+     */
+    function getIntersectingMeaningFromDeclarations(meaning: SemanticMeaning, declarations: Declaration[]): SemanticMeaning {
+        if (declarations) {
+            let lastIterationMeaning: SemanticMeaning;
+            do {
+                // The result is order-sensitive, for instance if initialMeaning === Namespace, and declarations = [class, instantiated module]
+                // we need to consider both as they initialMeaning intersects with the module in the namespace space, and the module
+                // intersects with the class in the value space.
+                // To achieve that we will keep iterating until the result stabilizes.
+
+                // Remember the last meaning
+                lastIterationMeaning = meaning;
 
-        const referenceEntries: ReferenceEntry[] = [];
+                for (const declaration of declarations) {
+                    const declarationMeaning = getMeaningFromDeclaration(declaration);
 
-        for (const referenceSymbol of referenceSymbols) {
-            addRange(referenceEntries, referenceSymbol.references);
+                    if (declarationMeaning & meaning) {
+                        meaning |= declarationMeaning;
+                    }
+                }
+            }
+            while (meaning !== lastIterationMeaning);
         }
-
-        return referenceEntries;
+        return meaning;
     }
 
     function isImplementation(node: Node): boolean {
@@ -1302,57 +1664,20 @@ namespace ts.FindAllReferences {
         }
     }
 
-    export function getReferenceEntriesForShorthandPropertyAssignment(node: Node, typeChecker: TypeChecker, result: ReferenceEntry[]): void {
-        const refSymbol = typeChecker.getSymbolAtLocation(node);
-        const shorthandSymbol = typeChecker.getShorthandAssignmentValueSymbol(refSymbol.valueDeclaration);
+    export function getReferenceEntriesForShorthandPropertyAssignment(node: Node, checker: TypeChecker, addReference: (node: Node) => void): void {
+        const refSymbol = checker.getSymbolAtLocation(node);
+        const shorthandSymbol = checker.getShorthandAssignmentValueSymbol(refSymbol.valueDeclaration);
 
         if (shorthandSymbol) {
             for (const declaration of shorthandSymbol.getDeclarations()) {
                 if (getMeaningFromDeclaration(declaration) & SemanticMeaning.Value) {
-                    result.push(getReferenceEntryFromNode(declaration));
+                    addReference(declaration);
                 }
             }
         }
     }
 
-    export function getReferenceEntryFromNode(node: Node): ReferenceEntry {
-        let start = node.getStart();
-        let end = node.getEnd();
-
-        if (node.kind === SyntaxKind.StringLiteral) {
-            start += 1;
-            end -= 1;
-        }
-
-        return {
-            fileName: node.getSourceFile().fileName,
-            textSpan: createTextSpanFromBounds(start, end),
-            isWriteAccess: isWriteAccess(node),
-            isDefinition: isDeclarationName(node) || isLiteralComputedPropertyDeclarationName(node)
-        };
-    }
-
-    /** A node is considered a writeAccess iff it is a name of a declaration or a target of an assignment */
-    function isWriteAccess(node: Node): boolean {
-        if (node.kind === SyntaxKind.Identifier && isDeclarationName(node)) {
-            return true;
-        }
-
-        const parent = node.parent;
-        if (parent) {
-            if (parent.kind === SyntaxKind.PostfixUnaryExpression || parent.kind === SyntaxKind.PrefixUnaryExpression) {
-                return true;
-            }
-            else if (parent.kind === SyntaxKind.BinaryExpression && (<BinaryExpression>parent).left === node) {
-                const operator = (<BinaryExpression>parent).operatorToken.kind;
-                return SyntaxKind.FirstAssignment <= operator && operator <= SyntaxKind.LastAssignment;
-            }
-        }
-
-        return false;
-    }
-
-    function forEachDescendantOfKind(node: Node, kind: SyntaxKind, action: (node: Node) => void) {
+    function forEachDescendantOfKind(node: Node, kind: SyntaxKind, action: (node: Node) => void): void {
         forEachChild(node, child => {
             if (child.kind === kind) {
                 action(child);
@@ -1361,35 +1686,6 @@ namespace ts.FindAllReferences {
         });
     }
 
-    /**
-     * Returns the containing object literal property declaration given a possible name node, e.g. "a" in x = { "a": 1 }
-     */
-    function getContainingObjectLiteralElement(node: Node): ObjectLiteralElement {
-        switch (node.kind) {
-            case SyntaxKind.StringLiteral:
-            case SyntaxKind.NumericLiteral:
-                if (node.parent.kind === SyntaxKind.ComputedPropertyName) {
-                    return isObjectLiteralPropertyDeclaration(node.parent.parent) ? node.parent.parent : undefined;
-                }
-            // intential fall through
-            case SyntaxKind.Identifier:
-                return isObjectLiteralPropertyDeclaration(node.parent) && node.parent.name === node ? node.parent : undefined;
-        }
-        return undefined;
-    }
-
-    function isObjectLiteralPropertyDeclaration(node: Node): node is ObjectLiteralElement  {
-        switch (node.kind) {
-            case SyntaxKind.PropertyAssignment:
-            case SyntaxKind.ShorthandPropertyAssignment:
-            case SyntaxKind.MethodDeclaration:
-            case SyntaxKind.GetAccessor:
-            case SyntaxKind.SetAccessor:
-                return true;
-        }
-        return false;
-    }
-
     /** Get `C` given `N` if `N` is in the position `class C extends N` or `class C extends foo.N` where `N` is an identifier. */
     function tryGetClassByExtendingIdentifier(node: Node): ClassLikeDeclaration | undefined {
         return tryGetClassExtendingExpressionWithTypeArguments(climbPastPropertyAccess(node).parent);
@@ -1402,4 +1698,29 @@ namespace ts.FindAllReferences {
 
         return false;
     }
+
+    /**
+     * If we are just looking for implementations and this is a property access expression, we need to get the
+     * symbol of the local type of the symbol the property is being accessed on. This is because our search
+     * symbol may have a different parent symbol if the local type's symbol does not declare the property
+     * being accessed (i.e. it is declared in some parent class or interface)
+     */
+    function getParentSymbolsOfPropertyAccess(location: Node, symbol: Symbol, checker: TypeChecker): Symbol[] | undefined {
+        const propertyAccessExpression = getPropertyAccessExpressionFromRightHandSide(location);
+        if (!propertyAccessExpression) {
+            return undefined;
+        }
+
+        const localParentType = checker.getTypeAtLocation(propertyAccessExpression.expression);
+        if (!localParentType) {
+            return undefined;
+        }
+
+        if (localParentType.symbol && localParentType.symbol.flags & (SymbolFlags.Class | SymbolFlags.Interface) && localParentType.symbol !== symbol.parent) {
+            return [localParentType.symbol];
+        }
+        else if (localParentType.flags & TypeFlags.UnionOrIntersection) {
+            return getSymbolsForClassAndInterfaceComponents(<UnionOrIntersectionType>localParentType);
+        }
+    }
 }
diff --git a/src/services/formatting/formatting.ts b/src/services/formatting/formatting.ts
index b998d57..531b768 100644
--- a/src/services/formatting/formatting.ts
+++ b/src/services/formatting/formatting.ts
@@ -34,31 +34,31 @@ namespace ts.formatting {
         getIndentationForToken(tokenLine: number, tokenKind: SyntaxKind, container: Node): number;
         getIndentationForComment(owningToken: SyntaxKind, tokenIndentation: number, container: Node): number;
         /**
-          * Indentation for open and close tokens of the node if it is block or another node that needs special indentation
-          * ... {
-          * .........<child>
-          * ....}
-          *  ____ - indentation
-          *      ____ - delta
-          **/
+         * Indentation for open and close tokens of the node if it is block or another node that needs special indentation
+         * ... {
+         * .........<child>
+         * ....}
+         *  ____ - indentation
+         *      ____ - delta
+         */
         getIndentation(): number;
         /**
-          * Prefered relative indentation for child nodes.
-          * Delta is used to carry the indentation info
-          * foo(bar({
-          *     $
-          * }))
-          * Both 'foo', 'bar' introduce new indentation with delta = 4, but total indentation in $ is not 8.
-          * foo: { indentation: 0, delta: 4 }
-          * bar: { indentation: foo.indentation + foo.delta = 4, delta: 4} however 'foo' and 'bar' are on the same line
-          * so bar inherits indentation from foo and bar.delta will be 4
-          *
-          */
+         * Prefered relative indentation for child nodes.
+         * Delta is used to carry the indentation info
+         * foo(bar({
+         *     $
+         * }))
+         * Both 'foo', 'bar' introduce new indentation with delta = 4, but total indentation in $ is not 8.
+         * foo: { indentation: 0, delta: 4 }
+         * bar: { indentation: foo.indentation + foo.delta = 4, delta: 4} however 'foo' and 'bar' are on the same line
+         * so bar inherits indentation from foo and bar.delta will be 4
+         *
+         */
         getDelta(child: TextRangeWithKind): number;
         /**
-          * Formatter calls this function when rule adds or deletes new lines from the text
-          * so indentation scope can adjust values of indentation and delta.
-          */
+         * Formatter calls this function when rule adds or deletes new lines from the text
+         * so indentation scope can adjust values of indentation and delta.
+         */
         recomputeIndentation(lineAddedByFormatting: boolean): void;
     }
 
@@ -175,7 +175,7 @@ namespace ts.formatting {
                 return rangeContainsRange((<InterfaceDeclaration>parent).members, node);
             case SyntaxKind.ModuleDeclaration:
                 const body = (<ModuleDeclaration>parent).body;
-                return body && body.kind === SyntaxKind.Block && rangeContainsRange((<Block>body).statements, node);
+                return body && body.kind === SyntaxKind.ModuleBlock && rangeContainsRange((<ModuleBlock>body).statements, node);
             case SyntaxKind.SourceFile:
             case SyntaxKind.Block:
             case SyntaxKind.ModuleBlock:
@@ -205,9 +205,9 @@ namespace ts.formatting {
     }
 
     /** formatting is not applied to ranges that contain parse errors.
-      * This function will return a predicate that for a given text range will tell
-      * if there are any parse errors that overlap with the range.
-      */
+     * This function will return a predicate that for a given text range will tell
+     * if there are any parse errors that overlap with the range.
+     */
     function prepareRangeContainsErrorFunction(errors: Diagnostic[], originalRange: TextRange): (r: TextRange) => boolean {
         if (!errors.length) {
             return rangeHasNoErrors;
@@ -248,16 +248,16 @@ namespace ts.formatting {
             }
         };
 
-        function rangeHasNoErrors(r: TextRange): boolean {
+        function rangeHasNoErrors(): boolean {
             return false;
         }
     }
 
     /**
-      * Start of the original range might fall inside the comment - scanner will not yield appropriate results
-      * This function will look for token that is located before the start of target range
-      * and return its end as start position for the scanner.
-      */
+     * Start of the original range might fall inside the comment - scanner will not yield appropriate results
+     * This function will look for token that is located before the start of target range
+     * and return its end as start position for the scanner.
+     */
     function getScanStartPosition(enclosingNode: Node, originalRange: TextRange, sourceFile: SourceFile): number {
         const start = enclosingNode.getStart(sourceFile);
         if (start === originalRange.pos && enclosingNode.end === originalRange.end) {
@@ -314,24 +314,55 @@ namespace ts.formatting {
         return 0;
     }
 
+    /* @internal */
+    export function formatNode(node: Node, sourceFileLike: SourceFileLike, languageVariant: LanguageVariant, initialIndentation: number, delta: number,  rulesProvider: RulesProvider): TextChange[] {
+        const range = { pos: 0, end: sourceFileLike.text.length };
+        return formatSpanWorker(
+            range,
+            node,
+            initialIndentation,
+            delta,
+            getFormattingScanner(sourceFileLike.text, languageVariant, range.pos, range.end),
+            rulesProvider.getFormatOptions(),
+            rulesProvider,
+            FormattingRequestKind.FormatSelection,
+            _ => false, // assume that node does not have any errors
+            sourceFileLike);
+    }
+
     function formatSpan(originalRange: TextRange,
         sourceFile: SourceFile,
         options: FormatCodeSettings,
         rulesProvider: RulesProvider,
         requestKind: FormattingRequestKind): TextChange[] {
-
-        const rangeContainsError = prepareRangeContainsErrorFunction(sourceFile.parseDiagnostics, originalRange);
-
-        // formatting context is used by rules provider
-        const formattingContext = new FormattingContext(sourceFile, requestKind);
-
         // find the smallest node that fully wraps the range and compute the initial indentation for the node
         const enclosingNode = findEnclosingNode(originalRange, sourceFile);
+        return formatSpanWorker(
+            originalRange,
+            enclosingNode,
+            SmartIndenter.getIndentationForNode(enclosingNode, originalRange, sourceFile, options),
+            getOwnOrInheritedDelta(enclosingNode, options, sourceFile),
+            getFormattingScanner(sourceFile.text, sourceFile.languageVariant, getScanStartPosition(enclosingNode, originalRange, sourceFile), originalRange.end),
+            options,
+            rulesProvider,
+            requestKind,
+            prepareRangeContainsErrorFunction(sourceFile.parseDiagnostics, originalRange),
+            sourceFile);
+    }
 
-        const formattingScanner = getFormattingScanner(sourceFile, getScanStartPosition(enclosingNode, originalRange, sourceFile), originalRange.end);
-
-        const initialIndentation = SmartIndenter.getIndentationForNode(enclosingNode, originalRange, sourceFile, options);
+    function formatSpanWorker(originalRange: TextRange,
+        enclosingNode: Node,
+        initialIndentation: number,
+        delta: number,
+        formattingScanner: FormattingScanner,
+        options: FormatCodeSettings,
+        rulesProvider: RulesProvider,
+        requestKind: FormattingRequestKind,
+        rangeContainsError: (r: TextRange) => boolean,
+        sourceFile: SourceFileLike): TextChange[] {
 
+        // formatting context is used by rules provider
+        const formattingContext = new FormattingContext(sourceFile, requestKind, options);
         let previousRangeHasError: boolean;
         let previousRange: TextRangeWithKind;
         let previousParent: Node;
@@ -351,14 +382,13 @@ namespace ts.formatting {
                 undecoratedStartLine = sourceFile.getLineAndCharacterOfPosition(getNonDecoratorTokenPosOfNode(enclosingNode, sourceFile)).line;
             }
 
-            const delta = getOwnOrInheritedDelta(enclosingNode, options, sourceFile);
             processNode(enclosingNode, enclosingNode, startLine, undecoratedStartLine, initialIndentation, delta);
         }
 
         if (!formattingScanner.isOnToken()) {
             const leadingTrivia = formattingScanner.getCurrentLeadingTrivia();
             if (leadingTrivia) {
-                processTrivia(leadingTrivia, enclosingNode, enclosingNode, undefined);
+                processTrivia(leadingTrivia, enclosingNode, enclosingNode, /*dynamicIndentation*/ undefined);
                 trimTrailingWhitespacesForRemainingRange();
             }
         }
@@ -370,12 +400,12 @@ namespace ts.formatting {
         // local functions
 
         /** Tries to compute the indentation for a list element.
-          * If list element is not in range then
-          * function will pick its actual indentation
-          * so it can be pushed downstream as inherited indentation.
-          * If list element is in the range - its indentation will be equal
-          * to inherited indentation from its predecessors.
-          */
+         * If list element is not in range then
+         * function will pick its actual indentation
+         * so it can be pushed downstream as inherited indentation.
+         * If list element is in the range - its indentation will be equal
+         * to inherited indentation from its predecessors.
+         */
         function tryComputeIndentationForListItem(startPos: number,
             endPos: number,
             parentStartLine: number,
@@ -453,12 +483,11 @@ namespace ts.formatting {
                 case SyntaxKind.MethodDeclaration:
                     if ((<MethodDeclaration>node).asteriskToken) {
                         return SyntaxKind.AsteriskToken;
-                    }/*
-                    fall-through
-                    */
+                    }
+                    // falls through
                 case SyntaxKind.PropertyDeclaration:
                 case SyntaxKind.Parameter:
-                    return (<Declaration>node).name.kind;
+                    return getNameOfDeclaration(<Declaration>node).kind;
             }
         }
 
@@ -488,18 +517,32 @@ namespace ts.formatting {
                         // open and close brace, 'else' and 'while' (in do statement) tokens has indentation of the parent
                         case SyntaxKind.OpenBraceToken:
                         case SyntaxKind.CloseBraceToken:
-                        case SyntaxKind.OpenBracketToken:
-                        case SyntaxKind.CloseBracketToken:
                         case SyntaxKind.OpenParenToken:
                         case SyntaxKind.CloseParenToken:
                         case SyntaxKind.ElseKeyword:
                         case SyntaxKind.WhileKeyword:
                         case SyntaxKind.AtToken:
                             return indentation;
-                        default:
-                            // if token line equals to the line of containing node (this is a first token in the node) - use node indentation
-                            return nodeStartLine !== line ? indentation + getEffectiveDelta(delta, container) : indentation;
+                        case SyntaxKind.SlashToken:
+                        case SyntaxKind.GreaterThanToken: {
+                            if (container.kind === SyntaxKind.JsxOpeningElement ||
+                                container.kind === SyntaxKind.JsxClosingElement ||
+                                container.kind === SyntaxKind.JsxSelfClosingElement
+                            ) {
+                                return indentation;
+                            }
+                            break;
+                        }
+                        case SyntaxKind.OpenBracketToken:
+                        case SyntaxKind.CloseBracketToken: {
+                            if (container.kind !== SyntaxKind.MappedType) {
+                                return indentation;
+                            }
+                            break;
+                        }
                     }
+                    // if token line equals to the line of containing node (this is a first token in the node) - use node indentation
+                    return nodeStartLine !== line ? indentation + getEffectiveDelta(delta, container) : indentation;
                 },
                 getIndentation: () => indentation,
                 getDelta: child => getEffectiveDelta(delta, child),
@@ -524,7 +567,7 @@ namespace ts.formatting {
 
             function getEffectiveDelta(delta: number, child: TextRangeWithKind) {
                 // Delta value should be zero when the node explicitly prevents indentation of the child node
-                return SmartIndenter.nodeWillIndentChild(node, child, true) ? delta : 0;
+                return SmartIndenter.nodeWillIndentChild(node, child, /*indentByDefault*/ true) ? delta : 0;
             }
         }
 
@@ -556,7 +599,7 @@ namespace ts.formatting {
                 child => {
                     processChildNode(child, /*inheritedIndentation*/ Constants.Unknown, node, nodeDynamicIndentation, nodeStartLine, undecoratedNodeStartLine, /*isListItem*/ false);
                 },
-                (nodes: NodeArray<Node>) => {
+                nodes => {
                     processChildNodes(nodes, node, nodeStartLine, nodeDynamicIndentation);
                 });
 
@@ -566,7 +609,7 @@ namespace ts.formatting {
                 if (tokenInfo.token.end > node.end) {
                     break;
                 }
-                consumeTokenAndAdvanceScanner(tokenInfo, node, nodeDynamicIndentation);
+                consumeTokenAndAdvanceScanner(tokenInfo, node, nodeDynamicIndentation, node);
             }
 
             function processChildNode(
@@ -617,17 +660,18 @@ namespace ts.formatting {
                         break;
                     }
 
-                    consumeTokenAndAdvanceScanner(tokenInfo, node, parentDynamicIndentation);
+                    consumeTokenAndAdvanceScanner(tokenInfo, node, parentDynamicIndentation, node);
                 }
 
                 if (!formattingScanner.isOnToken()) {
                     return inheritedIndentation;
                 }
 
-                if (isToken(child)) {
+                // JSX text shouldn't affect indenting
+                if (isToken(child) && child.kind !== SyntaxKind.JsxText) {
                     // if child node is a token, it does not impact indentation, proceed it using parent indentation scope rules
                     const tokenInfo = formattingScanner.readTokenInfo(child);
-                    Debug.assert(tokenInfo.token.end === child.end);
+                    Debug.assert(tokenInfo.token.end === child.end, "Token end is child end");
                     consumeTokenAndAdvanceScanner(tokenInfo, node, parentDynamicIndentation, child);
                     return inheritedIndentation;
                 }
@@ -672,11 +716,11 @@ namespace ts.formatting {
                                 computeIndentation(tokenInfo.token, startLine, Constants.Unknown, parent, parentDynamicIndentation, parentStartLine);
 
                             listDynamicIndentation = getDynamicIndentation(parent, parentStartLine, indentation.indentation, indentation.delta);
-                            consumeTokenAndAdvanceScanner(tokenInfo, parent, listDynamicIndentation);
+                            consumeTokenAndAdvanceScanner(tokenInfo, parent, listDynamicIndentation, parent);
                         }
                         else {
                             // consume any tokens that precede the list as child elements of 'node' using its indentation scope
-                            consumeTokenAndAdvanceScanner(tokenInfo, parent, parentDynamicIndentation);
+                            consumeTokenAndAdvanceScanner(tokenInfo, parent, parentDynamicIndentation, parent);
                         }
                     }
                 }
@@ -696,13 +740,13 @@ namespace ts.formatting {
                         // without this check close paren will be interpreted as list end token for function expression which is wrong
                         if (tokenInfo.token.kind === listEndToken && rangeContainsRange(parent, tokenInfo.token)) {
                             // consume list end token
-                            consumeTokenAndAdvanceScanner(tokenInfo, parent, listDynamicIndentation);
+                            consumeTokenAndAdvanceScanner(tokenInfo, parent, listDynamicIndentation, parent);
                         }
                     }
                 }
             }
 
-            function consumeTokenAndAdvanceScanner(currentTokenInfo: TokenInfo, parent: Node, dynamicIndentation: DynamicIndentation, container?: Node): void {
+            function consumeTokenAndAdvanceScanner(currentTokenInfo: TokenInfo, parent: Node, dynamicIndentation: DynamicIndentation, container: Node): void {
                 Debug.assert(rangeContainsRange(parent, currentTokenInfo.token));
 
                 const lastTriviaWasNewLine = formattingScanner.lastTrailingTriviaWasNewLine();
@@ -885,12 +929,25 @@ namespace ts.formatting {
             else {
                 const tokenStart = sourceFile.getLineAndCharacterOfPosition(pos);
                 const startLinePosition = getStartPositionOfLine(tokenStart.line, sourceFile);
-                if (indentation !== tokenStart.character || indentationIsDifferent(indentationString, startLinePosition)) {
+                if (indentation !== characterToColumn(startLinePosition, tokenStart.character) || indentationIsDifferent(indentationString, startLinePosition)) {
                     recordReplace(startLinePosition, tokenStart.character, indentationString);
                 }
             }
         }
 
+        function characterToColumn(startLinePosition: number, characterInLine: number): number {
+            let column = 0;
+            for (let i = 0; i < characterInLine; i++) {
+                if (sourceFile.text.charCodeAt(startLinePosition + i) === CharacterCodes.tab) {
+                    column += options.tabSize - column % options.tabSize;
+                }
+                else {
+                    column++;
+                }
+            }
+            return column;
+        }
+
         function indentationIsDifferent(indentationString: string, startLinePosition: number): boolean {
             return indentationString !== sourceFile.text.substr(startLinePosition, indentationString.length);
         }
@@ -936,7 +993,7 @@ namespace ts.formatting {
 
             // shift all parts on the delta size
             const delta = indentation - nonWhitespaceColumnInFirstPart.column;
-            for (let i = startIndex, len = parts.length; i < len; i++ , startLine++) {
+            for (let i = startIndex; i < parts.length; i++ , startLine++) {
                 const startLinePos = getStartPositionOfLine(startLine, sourceFile);
                 const nonWhitespaceCharacterAndColumn =
                     i === 0
diff --git a/src/services/formatting/formattingContext.ts b/src/services/formatting/formattingContext.ts
index bd5ca35..043df72 100644
--- a/src/services/formatting/formattingContext.ts
+++ b/src/services/formatting/formattingContext.ts
@@ -15,7 +15,7 @@ namespace ts.formatting {
         private contextNodeBlockIsOnOneLine: boolean;
         private nextNodeBlockIsOnOneLine: boolean;
 
-        constructor(public sourceFile: SourceFile, public formattingRequestKind: FormattingRequestKind) {
+        constructor(public readonly sourceFile: SourceFileLike, public formattingRequestKind: FormattingRequestKind, public options: ts.FormatCodeSettings) {
         }
 
         public updateContext(currentRange: TextRangeWithKind, currentTokenParent: Node, nextRange: TextRangeWithKind, nextTokenParent: Node, commonParent: Node) {
diff --git a/src/services/formatting/formattingScanner.ts b/src/services/formatting/formattingScanner.ts
index 7822e4a..20d190d 100644
--- a/src/services/formatting/formattingScanner.ts
+++ b/src/services/formatting/formattingScanner.ts
@@ -30,11 +30,11 @@ namespace ts.formatting {
         RescanJsxText,
     }
 
-    export function getFormattingScanner(sourceFile: SourceFile, startPos: number, endPos: number): FormattingScanner {
-        Debug.assert(scanner === undefined);
-        scanner = sourceFile.languageVariant === LanguageVariant.JSX ? jsxScanner : standardScanner;
+    export function getFormattingScanner(text: string, languageVariant: LanguageVariant, startPos: number, endPos: number): FormattingScanner {
+        Debug.assert(scanner === undefined, "Scanner should be undefined");
+        scanner = languageVariant === LanguageVariant.JSX ? jsxScanner : standardScanner;
 
-        scanner.setText(sourceFile.text);
+        scanner.setText(text);
         scanner.setTextPos(startPos);
 
         let wasNewLine = true;
@@ -62,7 +62,7 @@ namespace ts.formatting {
         };
 
         function advance(): void {
-            Debug.assert(scanner !== undefined);
+            Debug.assert(scanner !== undefined, "Scanner should be present");
 
             lastTokenInfo = undefined;
             const isStarted = scanner.getStartPos() !== startPos;
@@ -276,8 +276,8 @@ namespace ts.formatting {
         function isOnToken(): boolean {
             Debug.assert(scanner !== undefined);
 
-            const current = (lastTokenInfo && lastTokenInfo.token.kind) || scanner.getToken();
-            const startPos = (lastTokenInfo && lastTokenInfo.token.pos) || scanner.getStartPos();
+            const current = lastTokenInfo ? lastTokenInfo.token.kind : scanner.getToken();
+            const startPos = lastTokenInfo ? lastTokenInfo.token.pos : scanner.getStartPos();
             return startPos < endPos && current !== SyntaxKind.EndOfFileToken && !isTrivia(current);
         }
 
diff --git a/src/services/formatting/ruleOperationContext.ts b/src/services/formatting/ruleOperationContext.ts
index 6c368dc..6a19e23 100644
--- a/src/services/formatting/ruleOperationContext.ts
+++ b/src/services/formatting/ruleOperationContext.ts
@@ -12,12 +12,11 @@ namespace ts.formatting {
 
         static Any: RuleOperationContext = new RuleOperationContext();
 
-
         public IsAny(): boolean {
             return this === RuleOperationContext.Any;
         }
 
-        public  InContext(context: FormattingContext): boolean {
+        public InContext(context: FormattingContext): boolean {
             if (this.IsAny()) {
                 return true;
             }
diff --git a/src/services/formatting/rules.ts b/src/services/formatting/rules.ts
index 2095f06..2c1becb 100644
--- a/src/services/formatting/rules.ts
+++ b/src/services/formatting/rules.ts
@@ -4,7 +4,7 @@
 namespace ts.formatting {
     export class Rules {
         public getRuleName(rule: Rule) {
-            const o: ts.Map<any> = <any>this;
+            const o: ts.MapLike<any> = <any>this;
             for (const name in o) {
                 if (o[name] === rule) {
                     return name;
@@ -84,9 +84,11 @@ namespace ts.formatting {
         public NoSpaceBeforeComma: Rule;
 
         public SpaceAfterCertainKeywords: Rule;
+        public NoSpaceAfterNewKeywordOnConstructorSignature: Rule;
         public SpaceAfterLetConstInVariableDeclaration: Rule;
         public NoSpaceBeforeOpenParenInFuncCall: Rule;
         public SpaceAfterFunctionInFuncDecl: Rule;
+        public SpaceBeforeOpenParenInFuncDecl: Rule;
         public NoSpaceBeforeOpenParenInFuncDecl: Rule;
         public SpaceAfterVoidOperator: Rule;
 
@@ -112,6 +114,7 @@ namespace ts.formatting {
         // TypeScript-specific rules
 
         // Treat constructor as an identifier in a function declaration, and remove spaces between constructor and following left parentheses
+        public SpaceAfterConstructor: Rule;
         public NoSpaceAfterConstructor: Rule;
 
         // Use of module as a function call. e.g.: import m2 = module("m2");
@@ -145,6 +148,9 @@ namespace ts.formatting {
         // These rules are higher in priority than user-configurable rules.
         public HighPriorityCommonRules: Rule[];
 
+        // These rules are applied after high priority rules.
+        public UserConfigurableRules: Rule[];
+
         // These rules are lower in priority than user-configurable rules.
         public LowPriorityCommonRules: Rule[];
 
@@ -243,6 +249,9 @@ namespace ts.formatting {
         public NoSpaceAfterTypeAssertion: Rule;
         public SpaceAfterTypeAssertion: Rule;
 
+        // No space before non-null assertion operator
+        public NoSpaceBeforeNonNullAssertionOperator: Rule;
+
         constructor() {
             ///
             /// Common Rules
@@ -262,19 +271,21 @@ namespace ts.formatting {
             this.SpaceAfterSemicolon = new Rule(RuleDescriptor.create3(SyntaxKind.SemicolonToken, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), RuleAction.Space));
 
             // Space after }.
-            this.SpaceAfterCloseBrace = new Rule(RuleDescriptor.create3(SyntaxKind.CloseBraceToken, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsAfterCodeBlockContext), RuleAction.Space));
+            this.SpaceAfterCloseBrace = new Rule(RuleDescriptor.create3(SyntaxKind.CloseBraceToken, Shared.TokenRange.FromRange(SyntaxKind.FirstToken, SyntaxKind.LastToken, [SyntaxKind.CloseParenToken])), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsAfterCodeBlockContext), RuleAction.Space));
 
             // Special case for (}, else) and (}, while) since else & while tokens are not part of the tree which makes SpaceAfterCloseBrace rule not applied
             this.SpaceBetweenCloseBraceAndElse = new Rule(RuleDescriptor.create1(SyntaxKind.CloseBraceToken, SyntaxKind.ElseKeyword), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), RuleAction.Space));
             this.SpaceBetweenCloseBraceAndWhile = new Rule(RuleDescriptor.create1(SyntaxKind.CloseBraceToken, SyntaxKind.WhileKeyword), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), RuleAction.Space));
-            this.NoSpaceAfterCloseBrace = new Rule(RuleDescriptor.create3(SyntaxKind.CloseBraceToken, Shared.TokenRange.FromTokens([SyntaxKind.CloseParenToken, SyntaxKind.CloseBracketToken, SyntaxKind.CommaToken, SyntaxKind.SemicolonToken])), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), RuleAction.Delete));
+            this.NoSpaceAfterCloseBrace = new Rule(RuleDescriptor.create3(SyntaxKind.CloseBraceToken, Shared.TokenRange.FromTokens([SyntaxKind.CloseBracketToken, SyntaxKind.CommaToken, SyntaxKind.SemicolonToken])), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), RuleAction.Delete));
 
             // No space for dot
             this.NoSpaceBeforeDot = new Rule(RuleDescriptor.create2(Shared.TokenRange.Any, SyntaxKind.DotToken), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), RuleAction.Delete));
             this.NoSpaceAfterDot = new Rule(RuleDescriptor.create3(SyntaxKind.DotToken, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), RuleAction.Delete));
 
             // No space before and after indexer
-            this.NoSpaceBeforeOpenBracket = new Rule(RuleDescriptor.create2(Shared.TokenRange.Any, SyntaxKind.OpenBracketToken), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), RuleAction.Delete));
+            this.NoSpaceBeforeOpenBracket = new Rule(
+                RuleDescriptor.create2(Shared.TokenRange.AnyExcept(SyntaxKind.AsyncKeyword), SyntaxKind.OpenBracketToken),
+                RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), RuleAction.Delete));
             this.NoSpaceAfterCloseBracket = new Rule(RuleDescriptor.create3(SyntaxKind.CloseBracketToken, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBeforeBlockInFunctionDeclarationContext), RuleAction.Delete));
 
             // Place a space before open brace in a function declaration
@@ -290,10 +301,10 @@ namespace ts.formatting {
             this.SpaceBeforeOpenBraceInControl = new Rule(RuleDescriptor.create2(this.ControlOpenBraceLeftTokenRange, SyntaxKind.OpenBraceToken), RuleOperation.create2(new RuleOperationContext(Rules.IsControlDeclContext, Rules.IsNotFormatOnEnter, Rules.IsSameLineTokenOrBeforeMultilineBlockContext), RuleAction.Space), RuleFlags.CanDeleteNewLines);
 
             // Insert a space after { and before } in single-line contexts, but remove space from empty object literals {}.
-            this.SpaceAfterOpenBrace = new Rule(RuleDescriptor.create3(SyntaxKind.OpenBraceToken, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsSingleLineBlockContext), RuleAction.Space));
-            this.SpaceBeforeCloseBrace = new Rule(RuleDescriptor.create2(Shared.TokenRange.Any, SyntaxKind.CloseBraceToken), RuleOperation.create2(new RuleOperationContext(Rules.IsSingleLineBlockContext), RuleAction.Space));
-            this.NoSpaceAfterOpenBrace = new Rule(RuleDescriptor.create3(SyntaxKind.OpenBraceToken, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsSingleLineBlockContext), RuleAction.Delete));
-            this.NoSpaceBeforeCloseBrace = new Rule(RuleDescriptor.create2(Shared.TokenRange.Any, SyntaxKind.CloseBraceToken), RuleOperation.create2(new RuleOperationContext(Rules.IsSingleLineBlockContext), RuleAction.Delete));
+            this.SpaceAfterOpenBrace = new Rule(RuleDescriptor.create3(SyntaxKind.OpenBraceToken, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsOptionEnabledOrUndefined("insertSpaceAfterOpeningAndBeforeClosingNonemptyBraces"), Rules.IsBraceWrappedContext), RuleAction.Space));
+            this.SpaceBeforeCloseBrace = new Rule(RuleDescriptor.create2(Shared.TokenRange.Any, SyntaxKind.CloseBraceToken), RuleOperation.create2(new RuleOperationContext(Rules.IsOptionEnabledOrUndefined("insertSpaceAfterOpeningAndBeforeClosingNonemptyBraces"), Rules.IsBraceWrappedContext), RuleAction.Space));
+            this.NoSpaceAfterOpenBrace = new Rule(RuleDescriptor.create3(SyntaxKind.OpenBraceToken, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsOptionDisabled("insertSpaceAfterOpeningAndBeforeClosingNonemptyBraces"), Rules.IsNonJsxSameLineTokenContext), RuleAction.Delete));
+            this.NoSpaceBeforeCloseBrace = new Rule(RuleDescriptor.create2(Shared.TokenRange.Any, SyntaxKind.CloseBraceToken), RuleOperation.create2(new RuleOperationContext(Rules.IsOptionDisabled("insertSpaceAfterOpeningAndBeforeClosingNonemptyBraces"), Rules.IsNonJsxSameLineTokenContext), RuleAction.Delete));
             this.NoSpaceBetweenEmptyBraceBrackets = new Rule(RuleDescriptor.create1(SyntaxKind.OpenBraceToken, SyntaxKind.CloseBraceToken), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsObjectContext), RuleAction.Delete));
 
             // Insert new line after { and before } in multi-line contexts.
@@ -326,10 +337,12 @@ namespace ts.formatting {
             this.NoSpaceBeforeComma = new Rule(RuleDescriptor.create2(Shared.TokenRange.Any, SyntaxKind.CommaToken), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), RuleAction.Delete));
 
             this.SpaceAfterCertainKeywords = new Rule(RuleDescriptor.create4(Shared.TokenRange.FromTokens([SyntaxKind.VarKeyword, SyntaxKind.ThrowKeyword, SyntaxKind.NewKeyword, SyntaxKind.DeleteKeyword, SyntaxKind.ReturnKeyword, SyntaxKind.TypeOfKeyword, SyntaxKind.AwaitKeyword]), Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), RuleAction.Space));
+            this.NoSpaceAfterNewKeywordOnConstructorSignature = new Rule(RuleDescriptor.create1(SyntaxKind.NewKeyword, SyntaxKind.OpenParenToken), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsConstructorSignatureContext), RuleAction.Delete));
             this.SpaceAfterLetConstInVariableDeclaration = new Rule(RuleDescriptor.create4(Shared.TokenRange.FromTokens([SyntaxKind.LetKeyword, SyntaxKind.ConstKeyword]), Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsStartOfVariableDeclarationList), RuleAction.Space));
             this.NoSpaceBeforeOpenParenInFuncCall = new Rule(RuleDescriptor.create2(Shared.TokenRange.Any, SyntaxKind.OpenParenToken), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsFunctionCallOrNewContext, Rules.IsPreviousTokenNotComma), RuleAction.Delete));
             this.SpaceAfterFunctionInFuncDecl = new Rule(RuleDescriptor.create3(SyntaxKind.FunctionKeyword, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsFunctionDeclContext), RuleAction.Space));
-            this.NoSpaceBeforeOpenParenInFuncDecl = new Rule(RuleDescriptor.create2(Shared.TokenRange.Any, SyntaxKind.OpenParenToken), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsFunctionDeclContext), RuleAction.Delete));
+            this.SpaceBeforeOpenParenInFuncDecl = new Rule(RuleDescriptor.create2(Shared.TokenRange.Any, SyntaxKind.OpenParenToken), RuleOperation.create2(new RuleOperationContext(Rules.IsOptionEnabled("insertSpaceBeforeFunctionParenthesis"), Rules.IsNonJsxSameLineTokenContext, Rules.IsFunctionDeclContext), RuleAction.Space));
+            this.NoSpaceBeforeOpenParenInFuncDecl = new Rule(RuleDescriptor.create2(Shared.TokenRange.Any, SyntaxKind.OpenParenToken), RuleOperation.create2(new RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceBeforeFunctionParenthesis"), Rules.IsNonJsxSameLineTokenContext, Rules.IsFunctionDeclContext), RuleAction.Delete));
             this.SpaceAfterVoidOperator = new Rule(RuleDescriptor.create3(SyntaxKind.VoidKeyword, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsVoidOpContext), RuleAction.Space));
 
             this.NoSpaceBetweenReturnAndSemicolon = new Rule(RuleDescriptor.create1(SyntaxKind.ReturnKeyword, SyntaxKind.SemicolonToken), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), RuleAction.Delete));
@@ -351,14 +364,14 @@ namespace ts.formatting {
 
             // TypeScript-specific higher priority rules
 
-            // Treat constructor as an identifier in a function declaration, and remove spaces between constructor and following left parentheses
-            this.NoSpaceAfterConstructor = new Rule(RuleDescriptor.create1(SyntaxKind.ConstructorKeyword, SyntaxKind.OpenParenToken), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), RuleAction.Delete));
+            this.SpaceAfterConstructor = new Rule(RuleDescriptor.create1(SyntaxKind.ConstructorKeyword, SyntaxKind.OpenParenToken), RuleOperation.create2(new RuleOperationContext(Rules.IsOptionEnabled("insertSpaceAfterConstructor"), Rules.IsNonJsxSameLineTokenContext), RuleAction.Space));
+            this.NoSpaceAfterConstructor = new Rule(RuleDescriptor.create1(SyntaxKind.ConstructorKeyword, SyntaxKind.OpenParenToken), RuleOperation.create2(new RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceAfterConstructor"), Rules.IsNonJsxSameLineTokenContext), RuleAction.Delete));
 
             // Use of module as a function call. e.g.: import m2 = module("m2");
             this.NoSpaceAfterModuleImport = new Rule(RuleDescriptor.create2(Shared.TokenRange.FromTokens([SyntaxKind.ModuleKeyword, SyntaxKind.RequireKeyword]), SyntaxKind.OpenParenToken), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), RuleAction.Delete));
 
             // Add a space around certain TypeScript keywords
-            this.SpaceAfterCertainTypeScriptKeywords = new Rule(RuleDescriptor.create4(Shared.TokenRange.FromTokens([SyntaxKind.AbstractKeyword, SyntaxKind.ClassKeyword, SyntaxKind.DeclareKeyword, SyntaxKind.DefaultKeyword, SyntaxKind.EnumKeyword, SyntaxKind.ExportKeyword, SyntaxKind.ExtendsKeyword, SyntaxKind.GetKeyword, SyntaxKind.ImplementsKeyword, SyntaxKind.ImportKeyword, SyntaxKind.InterfaceKeyword, SyntaxKind.ModuleKeyword, SyntaxKind.NamespaceKeyword, SyntaxKind.PrivateKeyword, SyntaxKind.PublicKeyword, SyntaxKind.ProtectedKeyword, SyntaxKind.SetKeyword, SyntaxKind.StaticKeyword, SyntaxKind.TypeKeyword, SyntaxKind.FromKeyword]), Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), RuleAction.Space));
+            this.SpaceAfterCertainTypeScriptKeywords = new Rule(RuleDescriptor.create4(Shared.TokenRange.FromTokens([SyntaxKind.AbstractKeyword, SyntaxKind.ClassKeyword, SyntaxKind.DeclareKeyword, SyntaxKind.DefaultKeyword, SyntaxKind.EnumKeyword, SyntaxKind.ExportKeyword, SyntaxKind.ExtendsKeyword, SyntaxKind.GetKeyword, SyntaxKind.ImplementsKeyword, SyntaxKind.ImportKeyword, SyntaxKind.InterfaceKeyword, SyntaxKind.ModuleKeyword, SyntaxKind.NamespaceKeyword, SyntaxKind.PrivateKeyword, SyntaxKind.PublicKeyword, SyntaxKind.ProtectedKeyword, SyntaxKind.ReadonlyKeyword, SyntaxKind.SetKeyword, SyntaxKind.StaticKeyword, SyntaxKind.TypeKeyword, SyntaxKind.FromKeyword, SyntaxKind.KeyOfKeyword]), Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), RuleAction.Space));
             this.SpaceBeforeCertainTypeScriptKeywords = new Rule(RuleDescriptor.create4(Shared.TokenRange.Any, Shared.TokenRange.FromTokens([SyntaxKind.ExtendsKeyword, SyntaxKind.ImplementsKeyword, SyntaxKind.FromKeyword])), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), RuleAction.Space));
 
             // Treat string literals in module names as identifiers, and add a space between the literal and the opening Brace braces, e.g.: module "m2" {
@@ -406,6 +419,75 @@ namespace ts.formatting {
             this.NoSpaceBeforeEqualInJsxAttribute = new Rule(RuleDescriptor.create2(Shared.TokenRange.Any, SyntaxKind.EqualsToken), RuleOperation.create2(new RuleOperationContext(Rules.IsJsxAttributeContext, Rules.IsNonJsxSameLineTokenContext), RuleAction.Delete));
             this.NoSpaceAfterEqualInJsxAttribute = new Rule(RuleDescriptor.create3(SyntaxKind.EqualsToken, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsJsxAttributeContext, Rules.IsNonJsxSameLineTokenContext), RuleAction.Delete));
 
+            // No space before non-null assertion operator
+            this.NoSpaceBeforeNonNullAssertionOperator = new Rule(RuleDescriptor.create2(Shared.TokenRange.Any, SyntaxKind.ExclamationToken), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNonNullAssertionContext), RuleAction.Delete));
+
+            ///
+            /// Rules controlled by user options
+            ///
+
+            // Insert space after comma delimiter
+            this.SpaceAfterComma = new Rule(RuleDescriptor.create3(SyntaxKind.CommaToken, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsOptionEnabled("insertSpaceAfterCommaDelimiter"), Rules.IsNonJsxSameLineTokenContext, Rules.IsNonJsxElementContext, Rules.IsNextTokenNotCloseBracket), RuleAction.Space));
+            this.NoSpaceAfterComma = new Rule(RuleDescriptor.create3(SyntaxKind.CommaToken, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceAfterCommaDelimiter"), Rules.IsNonJsxSameLineTokenContext, Rules.IsNonJsxElementContext), RuleAction.Delete));
+
+            // Insert space before and after binary operators
+            this.SpaceBeforeBinaryOperator = new Rule(RuleDescriptor.create4(Shared.TokenRange.Any, Shared.TokenRange.BinaryOperators), RuleOperation.create2(new RuleOperationContext(Rules.IsOptionEnabled("insertSpaceBeforeAndAfterBinaryOperators"), Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), RuleAction.Space));
+            this.SpaceAfterBinaryOperator = new Rule(RuleDescriptor.create4(Shared.TokenRange.BinaryOperators, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsOptionEnabled("insertSpaceBeforeAndAfterBinaryOperators"), Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), RuleAction.Space));
+            this.NoSpaceBeforeBinaryOperator = new Rule(RuleDescriptor.create4(Shared.TokenRange.Any, Shared.TokenRange.BinaryOperators), RuleOperation.create2(new RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceBeforeAndAfterBinaryOperators"), Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), RuleAction.Delete));
+            this.NoSpaceAfterBinaryOperator = new Rule(RuleDescriptor.create4(Shared.TokenRange.BinaryOperators, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceBeforeAndAfterBinaryOperators"), Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), RuleAction.Delete));
+
+            // Insert space after keywords in control flow statements
+            this.SpaceAfterKeywordInControl = new Rule(RuleDescriptor.create2(Shared.TokenRange.Keywords, SyntaxKind.OpenParenToken), RuleOperation.create2(new RuleOperationContext(Rules.IsOptionEnabled("insertSpaceAfterKeywordsInControlFlowStatements"), Rules.IsControlDeclContext), RuleAction.Space));
+            this.NoSpaceAfterKeywordInControl = new Rule(RuleDescriptor.create2(Shared.TokenRange.Keywords, SyntaxKind.OpenParenToken), RuleOperation.create2(new RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceAfterKeywordsInControlFlowStatements"), Rules.IsControlDeclContext), RuleAction.Delete));
+
+            // Open Brace braces after function
+            // TypeScript: Function can have return types, which can be made of tons of different token kinds
+            this.NewLineBeforeOpenBraceInFunction = new Rule(RuleDescriptor.create2(this.FunctionOpenBraceLeftTokenRange, SyntaxKind.OpenBraceToken), RuleOperation.create2(new RuleOperationContext(Rules.IsOptionEnabled("placeOpenBraceOnNewLineForFunctions"), Rules.IsFunctionDeclContext, Rules.IsBeforeMultilineBlockContext), RuleAction.NewLine), RuleFlags.CanDeleteNewLines);
+
+            // Open Brace braces after TypeScript module/class/interface
+            this.NewLineBeforeOpenBraceInTypeScriptDeclWithBlock = new Rule(RuleDescriptor.create2(this.TypeScriptOpenBraceLeftTokenRange, SyntaxKind.OpenBraceToken), RuleOperation.create2(new RuleOperationContext(Rules.IsOptionEnabled("placeOpenBraceOnNewLineForFunctions"), Rules.IsTypeScriptDeclWithBlockContext, Rules.IsBeforeMultilineBlockContext), RuleAction.NewLine), RuleFlags.CanDeleteNewLines);
+
+            // Open Brace braces after control block
+            this.NewLineBeforeOpenBraceInControl = new Rule(RuleDescriptor.create2(this.ControlOpenBraceLeftTokenRange, SyntaxKind.OpenBraceToken), RuleOperation.create2(new RuleOperationContext(Rules.IsOptionEnabled("placeOpenBraceOnNewLineForControlBlocks"), Rules.IsControlDeclContext, Rules.IsBeforeMultilineBlockContext), RuleAction.NewLine), RuleFlags.CanDeleteNewLines);
+
+            // Insert space after semicolon in for statement
+            this.SpaceAfterSemicolonInFor = new Rule(RuleDescriptor.create3(SyntaxKind.SemicolonToken, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsOptionEnabled("insertSpaceAfterSemicolonInForStatements"), Rules.IsNonJsxSameLineTokenContext, Rules.IsForContext), RuleAction.Space));
+            this.NoSpaceAfterSemicolonInFor = new Rule(RuleDescriptor.create3(SyntaxKind.SemicolonToken, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceAfterSemicolonInForStatements"), Rules.IsNonJsxSameLineTokenContext, Rules.IsForContext), RuleAction.Delete));
+
+            // Insert space after opening and before closing nonempty parenthesis
+            this.SpaceAfterOpenParen = new Rule(RuleDescriptor.create3(SyntaxKind.OpenParenToken, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsOptionEnabled("insertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis"), Rules.IsNonJsxSameLineTokenContext), RuleAction.Space));
+            this.SpaceBeforeCloseParen = new Rule(RuleDescriptor.create2(Shared.TokenRange.Any, SyntaxKind.CloseParenToken), RuleOperation.create2(new RuleOperationContext(Rules.IsOptionEnabled("insertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis"), Rules.IsNonJsxSameLineTokenContext), RuleAction.Space));
+            this.NoSpaceBetweenParens = new Rule(RuleDescriptor.create1(SyntaxKind.OpenParenToken, SyntaxKind.CloseParenToken), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), RuleAction.Delete));
+            this.NoSpaceAfterOpenParen = new Rule(RuleDescriptor.create3(SyntaxKind.OpenParenToken, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis"), Rules.IsNonJsxSameLineTokenContext), RuleAction.Delete));
+            this.NoSpaceBeforeCloseParen = new Rule(RuleDescriptor.create2(Shared.TokenRange.Any, SyntaxKind.CloseParenToken), RuleOperation.create2(new RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis"), Rules.IsNonJsxSameLineTokenContext), RuleAction.Delete));
+
+            // Insert space after opening and before closing nonempty brackets
+            this.SpaceAfterOpenBracket = new Rule(RuleDescriptor.create3(SyntaxKind.OpenBracketToken, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsOptionEnabled("insertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets"), Rules.IsNonJsxSameLineTokenContext), RuleAction.Space));
+            this.SpaceBeforeCloseBracket = new Rule(RuleDescriptor.create2(Shared.TokenRange.Any, SyntaxKind.CloseBracketToken), RuleOperation.create2(new RuleOperationContext(Rules.IsOptionEnabled("insertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets"), Rules.IsNonJsxSameLineTokenContext), RuleAction.Space));
+            this.NoSpaceBetweenBrackets = new Rule(RuleDescriptor.create1(SyntaxKind.OpenBracketToken, SyntaxKind.CloseBracketToken), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), RuleAction.Delete));
+            this.NoSpaceAfterOpenBracket = new Rule(RuleDescriptor.create3(SyntaxKind.OpenBracketToken, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets"), Rules.IsNonJsxSameLineTokenContext), RuleAction.Delete));
+            this.NoSpaceBeforeCloseBracket = new Rule(RuleDescriptor.create2(Shared.TokenRange.Any, SyntaxKind.CloseBracketToken), RuleOperation.create2(new RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets"), Rules.IsNonJsxSameLineTokenContext), RuleAction.Delete));
+
+            // Insert space after opening and before closing template string braces
+            this.NoSpaceAfterTemplateHeadAndMiddle = new Rule(RuleDescriptor.create4(Shared.TokenRange.FromTokens([SyntaxKind.TemplateHead, SyntaxKind.TemplateMiddle]), Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces"), Rules.IsNonJsxSameLineTokenContext), RuleAction.Delete));
+            this.SpaceAfterTemplateHeadAndMiddle = new Rule(RuleDescriptor.create4(Shared.TokenRange.FromTokens([SyntaxKind.TemplateHead, SyntaxKind.TemplateMiddle]), Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsOptionEnabled("insertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces"), Rules.IsNonJsxSameLineTokenContext), RuleAction.Space));
+            this.NoSpaceBeforeTemplateMiddleAndTail = new Rule(RuleDescriptor.create4(Shared.TokenRange.Any, Shared.TokenRange.FromTokens([SyntaxKind.TemplateMiddle, SyntaxKind.TemplateTail])), RuleOperation.create2(new RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces"), Rules.IsNonJsxSameLineTokenContext), RuleAction.Delete));
+            this.SpaceBeforeTemplateMiddleAndTail = new Rule(RuleDescriptor.create4(Shared.TokenRange.Any, Shared.TokenRange.FromTokens([SyntaxKind.TemplateMiddle, SyntaxKind.TemplateTail])), RuleOperation.create2(new RuleOperationContext(Rules.IsOptionEnabled("insertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces"), Rules.IsNonJsxSameLineTokenContext), RuleAction.Space));
+
+            // No space after { and before } in JSX expression
+            this.NoSpaceAfterOpenBraceInJsxExpression = new Rule(RuleDescriptor.create3(SyntaxKind.OpenBraceToken, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceAfterOpeningAndBeforeClosingJsxExpressionBraces"), Rules.IsNonJsxSameLineTokenContext, Rules.IsJsxExpressionContext), RuleAction.Delete));
+            this.SpaceAfterOpenBraceInJsxExpression = new Rule(RuleDescriptor.create3(SyntaxKind.OpenBraceToken, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsOptionEnabled("insertSpaceAfterOpeningAndBeforeClosingJsxExpressionBraces"), Rules.IsNonJsxSameLineTokenContext, Rules.IsJsxExpressionContext), RuleAction.Space));
+            this.NoSpaceBeforeCloseBraceInJsxExpression = new Rule(RuleDescriptor.create2(Shared.TokenRange.Any, SyntaxKind.CloseBraceToken), RuleOperation.create2(new RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceAfterOpeningAndBeforeClosingJsxExpressionBraces"), Rules.IsNonJsxSameLineTokenContext, Rules.IsJsxExpressionContext), RuleAction.Delete));
+            this.SpaceBeforeCloseBraceInJsxExpression = new Rule(RuleDescriptor.create2(Shared.TokenRange.Any, SyntaxKind.CloseBraceToken), RuleOperation.create2(new RuleOperationContext(Rules.IsOptionEnabled("insertSpaceAfterOpeningAndBeforeClosingJsxExpressionBraces"), Rules.IsNonJsxSameLineTokenContext, Rules.IsJsxExpressionContext), RuleAction.Space));
+
+            // Insert space after function keyword for anonymous functions
+            this.SpaceAfterAnonymousFunctionKeyword = new Rule(RuleDescriptor.create1(SyntaxKind.FunctionKeyword, SyntaxKind.OpenParenToken), RuleOperation.create2(new RuleOperationContext(Rules.IsOptionEnabled("insertSpaceAfterFunctionKeywordForAnonymousFunctions"), Rules.IsFunctionDeclContext), RuleAction.Space));
+            this.NoSpaceAfterAnonymousFunctionKeyword = new Rule(RuleDescriptor.create1(SyntaxKind.FunctionKeyword, SyntaxKind.OpenParenToken), RuleOperation.create2(new RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceAfterFunctionKeywordForAnonymousFunctions"), Rules.IsFunctionDeclContext), RuleAction.Delete));
+
+            // No space after type assertion
+            this.NoSpaceAfterTypeAssertion = new Rule(RuleDescriptor.create3(SyntaxKind.GreaterThanToken, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsOptionDisabledOrUndefined("insertSpaceAfterTypeAssertion"), Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeAssertionContext), RuleAction.Delete));
+            this.SpaceAfterTypeAssertion = new Rule(RuleDescriptor.create3(SyntaxKind.GreaterThanToken, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsOptionEnabled("insertSpaceAfterTypeAssertion"), Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeAssertionContext), RuleAction.Space));
+
             // These rules are higher in priority than user-configurable rules.
             this.HighPriorityCommonRules = [
                 this.IgnoreBeforeComment, this.IgnoreAfterLineComment,
@@ -437,7 +519,7 @@ namespace ts.formatting {
                 this.NoSpaceBeforeEqualInJsxAttribute, this.NoSpaceAfterEqualInJsxAttribute,
 
                 // TypeScript-specific rules
-                this.NoSpaceAfterConstructor, this.NoSpaceAfterModuleImport,
+                this.NoSpaceAfterModuleImport,
                 this.SpaceAfterCertainTypeScriptKeywords, this.SpaceBeforeCertainTypeScriptKeywords,
                 this.SpaceAfterModuleName,
                 this.SpaceBeforeArrow, this.SpaceAfterArrow,
@@ -452,6 +534,27 @@ namespace ts.formatting {
                 this.SpaceBeforeAt,
                 this.NoSpaceAfterAt,
                 this.SpaceAfterDecorator,
+                this.NoSpaceBeforeNonNullAssertionOperator,
+                this.NoSpaceAfterNewKeywordOnConstructorSignature
+            ];
+
+            // These rules are applied after high priority rules.
+            this.UserConfigurableRules = [
+                this.SpaceAfterConstructor, this.NoSpaceAfterConstructor,
+                this.SpaceAfterComma, this.NoSpaceAfterComma,
+                this.SpaceAfterAnonymousFunctionKeyword, this.NoSpaceAfterAnonymousFunctionKeyword,
+                this.SpaceAfterKeywordInControl, this.NoSpaceAfterKeywordInControl,
+                this.SpaceAfterOpenParen, this.SpaceBeforeCloseParen, this.NoSpaceBetweenParens, this.NoSpaceAfterOpenParen, this.NoSpaceBeforeCloseParen,
+                this.SpaceAfterOpenBracket, this.SpaceBeforeCloseBracket, this.NoSpaceBetweenBrackets, this.NoSpaceAfterOpenBracket, this.NoSpaceBeforeCloseBracket,
+                this.SpaceAfterOpenBrace, this.SpaceBeforeCloseBrace, this.NoSpaceBetweenEmptyBraceBrackets, this.NoSpaceAfterOpenBrace, this.NoSpaceBeforeCloseBrace,
+                this.SpaceAfterTemplateHeadAndMiddle, this.SpaceBeforeTemplateMiddleAndTail, this.NoSpaceAfterTemplateHeadAndMiddle, this.NoSpaceBeforeTemplateMiddleAndTail,
+                this.SpaceAfterOpenBraceInJsxExpression, this.SpaceBeforeCloseBraceInJsxExpression, this.NoSpaceAfterOpenBraceInJsxExpression, this.NoSpaceBeforeCloseBraceInJsxExpression,
+                this.SpaceAfterSemicolonInFor, this.NoSpaceAfterSemicolonInFor,
+                this.SpaceBeforeBinaryOperator, this.SpaceAfterBinaryOperator, this.NoSpaceBeforeBinaryOperator, this.NoSpaceAfterBinaryOperator,
+                this.SpaceBeforeOpenParenInFuncDecl, this.NoSpaceBeforeOpenParenInFuncDecl,
+                this.NewLineBeforeOpenBraceInControl,
+                this.NewLineBeforeOpenBraceInFunction, this.NewLineBeforeOpenBraceInTypeScriptDeclWithBlock,
+                this.SpaceAfterTypeAssertion, this.NoSpaceAfterTypeAssertion
             ];
 
             // These rules are lower in priority than user-configurable rules.
@@ -462,81 +565,29 @@ namespace ts.formatting {
                 this.NoSpaceBeforeOpenBracket,
                 this.NoSpaceAfterCloseBracket,
                 this.SpaceAfterSemicolon,
-                this.NoSpaceBeforeOpenParenInFuncDecl,
                 this.SpaceBetweenStatements, this.SpaceAfterTryFinally
             ];
+        }
 
-            ///
-            /// Rules controlled by user options
-            ///
-
-            // Insert space after comma delimiter
-            this.SpaceAfterComma = new Rule(RuleDescriptor.create3(SyntaxKind.CommaToken, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNonJsxElementContext, Rules.IsNextTokenNotCloseBracket), RuleAction.Space));
-            this.NoSpaceAfterComma = new Rule(RuleDescriptor.create3(SyntaxKind.CommaToken, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNonJsxElementContext), RuleAction.Delete));
-
-            // Insert space before and after binary operators
-            this.SpaceBeforeBinaryOperator = new Rule(RuleDescriptor.create4(Shared.TokenRange.Any, Shared.TokenRange.BinaryOperators), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), RuleAction.Space));
-            this.SpaceAfterBinaryOperator = new Rule(RuleDescriptor.create4(Shared.TokenRange.BinaryOperators, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), RuleAction.Space));
-            this.NoSpaceBeforeBinaryOperator = new Rule(RuleDescriptor.create4(Shared.TokenRange.Any, Shared.TokenRange.BinaryOperators), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), RuleAction.Delete));
-            this.NoSpaceAfterBinaryOperator = new Rule(RuleDescriptor.create4(Shared.TokenRange.BinaryOperators, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), RuleAction.Delete));
-
-            // Insert space after keywords in control flow statements
-            this.SpaceAfterKeywordInControl = new Rule(RuleDescriptor.create2(Shared.TokenRange.Keywords, SyntaxKind.OpenParenToken), RuleOperation.create2(new RuleOperationContext(Rules.IsControlDeclContext), RuleAction.Space));
-            this.NoSpaceAfterKeywordInControl = new Rule(RuleDescriptor.create2(Shared.TokenRange.Keywords, SyntaxKind.OpenParenToken), RuleOperation.create2(new RuleOperationContext(Rules.IsControlDeclContext), RuleAction.Delete));
-
-            // Open Brace braces after function
-            // TypeScript: Function can have return types, which can be made of tons of different token kinds
-            this.NewLineBeforeOpenBraceInFunction = new Rule(RuleDescriptor.create2(this.FunctionOpenBraceLeftTokenRange, SyntaxKind.OpenBraceToken), RuleOperation.create2(new RuleOperationContext(Rules.IsFunctionDeclContext, Rules.IsBeforeMultilineBlockContext), RuleAction.NewLine), RuleFlags.CanDeleteNewLines);
-
-            // Open Brace braces after TypeScript module/class/interface
-            this.NewLineBeforeOpenBraceInTypeScriptDeclWithBlock = new Rule(RuleDescriptor.create2(this.TypeScriptOpenBraceLeftTokenRange, SyntaxKind.OpenBraceToken), RuleOperation.create2(new RuleOperationContext(Rules.IsTypeScriptDeclWithBlockContext, Rules.IsBeforeMultilineBlockContext), RuleAction.NewLine), RuleFlags.CanDeleteNewLines);
-
-            // Open Brace braces after control block
-            this.NewLineBeforeOpenBraceInControl = new Rule(RuleDescriptor.create2(this.ControlOpenBraceLeftTokenRange, SyntaxKind.OpenBraceToken), RuleOperation.create2(new RuleOperationContext(Rules.IsControlDeclContext, Rules.IsBeforeMultilineBlockContext), RuleAction.NewLine), RuleFlags.CanDeleteNewLines);
-
-            // Insert space after semicolon in for statement
-            this.SpaceAfterSemicolonInFor = new Rule(RuleDescriptor.create3(SyntaxKind.SemicolonToken, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsForContext), RuleAction.Space));
-            this.NoSpaceAfterSemicolonInFor = new Rule(RuleDescriptor.create3(SyntaxKind.SemicolonToken, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsForContext), RuleAction.Delete));
-
-            // Insert space after opening and before closing nonempty parenthesis
-            this.SpaceAfterOpenParen = new Rule(RuleDescriptor.create3(SyntaxKind.OpenParenToken, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), RuleAction.Space));
-            this.SpaceBeforeCloseParen = new Rule(RuleDescriptor.create2(Shared.TokenRange.Any, SyntaxKind.CloseParenToken), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), RuleAction.Space));
-            this.NoSpaceBetweenParens = new Rule(RuleDescriptor.create1(SyntaxKind.OpenParenToken, SyntaxKind.CloseParenToken), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), RuleAction.Delete));
-            this.NoSpaceAfterOpenParen = new Rule(RuleDescriptor.create3(SyntaxKind.OpenParenToken, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), RuleAction.Delete));
-            this.NoSpaceBeforeCloseParen = new Rule(RuleDescriptor.create2(Shared.TokenRange.Any, SyntaxKind.CloseParenToken), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), RuleAction.Delete));
-
-            // Insert space after opening and before closing nonempty brackets
-            this.SpaceAfterOpenBracket = new Rule(RuleDescriptor.create3(SyntaxKind.OpenBracketToken, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), RuleAction.Space));
-            this.SpaceBeforeCloseBracket = new Rule(RuleDescriptor.create2(Shared.TokenRange.Any, SyntaxKind.CloseBracketToken), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), RuleAction.Space));
-            this.NoSpaceBetweenBrackets = new Rule(RuleDescriptor.create1(SyntaxKind.OpenBracketToken, SyntaxKind.CloseBracketToken), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), RuleAction.Delete));
-            this.NoSpaceAfterOpenBracket = new Rule(RuleDescriptor.create3(SyntaxKind.OpenBracketToken, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), RuleAction.Delete));
-            this.NoSpaceBeforeCloseBracket = new Rule(RuleDescriptor.create2(Shared.TokenRange.Any, SyntaxKind.CloseBracketToken), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), RuleAction.Delete));
-
-            // Insert space after opening and before closing template string braces
-            this.NoSpaceAfterTemplateHeadAndMiddle = new Rule(RuleDescriptor.create4(Shared.TokenRange.FromTokens([SyntaxKind.TemplateHead, SyntaxKind.TemplateMiddle]), Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), RuleAction.Delete));
-            this.SpaceAfterTemplateHeadAndMiddle = new Rule(RuleDescriptor.create4(Shared.TokenRange.FromTokens([SyntaxKind.TemplateHead, SyntaxKind.TemplateMiddle]), Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), RuleAction.Space));
-            this.NoSpaceBeforeTemplateMiddleAndTail = new Rule(RuleDescriptor.create4(Shared.TokenRange.Any, Shared.TokenRange.FromTokens([SyntaxKind.TemplateMiddle, SyntaxKind.TemplateTail])), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), RuleAction.Delete));
-            this.SpaceBeforeTemplateMiddleAndTail = new Rule(RuleDescriptor.create4(Shared.TokenRange.Any, Shared.TokenRange.FromTokens([SyntaxKind.TemplateMiddle, SyntaxKind.TemplateTail])), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), RuleAction.Space));
-
-            // No space after { and before } in JSX expression
-            this.NoSpaceAfterOpenBraceInJsxExpression = new Rule(RuleDescriptor.create3(SyntaxKind.OpenBraceToken, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsJsxExpressionContext), RuleAction.Delete));
-            this.SpaceAfterOpenBraceInJsxExpression = new Rule(RuleDescriptor.create3(SyntaxKind.OpenBraceToken, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsJsxExpressionContext), RuleAction.Space));
-            this.NoSpaceBeforeCloseBraceInJsxExpression = new Rule(RuleDescriptor.create2(Shared.TokenRange.Any, SyntaxKind.CloseBraceToken), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsJsxExpressionContext), RuleAction.Delete));
-            this.SpaceBeforeCloseBraceInJsxExpression = new Rule(RuleDescriptor.create2(Shared.TokenRange.Any, SyntaxKind.CloseBraceToken), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsJsxExpressionContext), RuleAction.Space));
+        ///
+        /// Contexts
+        ///
 
-            // Insert space after function keyword for anonymous functions
-            this.SpaceAfterAnonymousFunctionKeyword = new Rule(RuleDescriptor.create1(SyntaxKind.FunctionKeyword, SyntaxKind.OpenParenToken), RuleOperation.create2(new RuleOperationContext(Rules.IsFunctionDeclContext), RuleAction.Space));
-            this.NoSpaceAfterAnonymousFunctionKeyword = new Rule(RuleDescriptor.create1(SyntaxKind.FunctionKeyword, SyntaxKind.OpenParenToken), RuleOperation.create2(new RuleOperationContext(Rules.IsFunctionDeclContext), RuleAction.Delete));
+        static IsOptionEnabled(optionName: keyof FormatCodeSettings): (context: FormattingContext) => boolean {
+            return (context) => context.options && context.options.hasOwnProperty(optionName) && !!context.options[optionName];
+        }
 
-            // No space after type assertion
-            this.NoSpaceAfterTypeAssertion = new Rule(RuleDescriptor.create3(SyntaxKind.GreaterThanToken, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeAssertionContext), RuleAction.Delete));
-            this.SpaceAfterTypeAssertion = new Rule(RuleDescriptor.create3(SyntaxKind.GreaterThanToken, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeAssertionContext), RuleAction.Space));
+        static IsOptionDisabled(optionName: keyof FormatCodeSettings): (context: FormattingContext) => boolean {
+            return (context) => context.options && context.options.hasOwnProperty(optionName) && !context.options[optionName];
+        }
 
+        static IsOptionDisabledOrUndefined(optionName: keyof FormatCodeSettings): (context: FormattingContext) => boolean {
+            return (context) => !context.options || !context.options.hasOwnProperty(optionName) || !context.options[optionName];
         }
 
-        ///
-        /// Contexts
-        ///
+        static IsOptionEnabledOrUndefined(optionName: keyof FormatCodeSettings): (context: FormattingContext) => boolean {
+            return (context) => !context.options || !context.options.hasOwnProperty(optionName) || !!context.options[optionName];
+        }
 
         static IsForContext(context: FormattingContext): boolean {
             return context.contextNode.kind === SyntaxKind.ForStatement;
@@ -575,6 +626,8 @@ namespace ts.formatting {
                     return context.currentTokenSpan.kind === SyntaxKind.EqualsToken || context.nextTokenSpan.kind === SyntaxKind.EqualsToken;
                 // "in" keyword in for (let x in []) { }
                 case SyntaxKind.ForInStatement:
+                // "in" keyword in [P in keyof T]: T[P]
+                case SyntaxKind.TypeParameter:
                     return context.currentTokenSpan.kind === SyntaxKind.InKeyword || context.nextTokenSpan.kind === SyntaxKind.InKeyword;
                 // Technically, "of" is not a binary operator, but format it the same way as "in"
                 case SyntaxKind.ForOfStatement:
@@ -612,6 +665,10 @@ namespace ts.formatting {
             return context.TokensAreOnSameLine() || Rules.IsBeforeMultilineBlockContext(context);
         }
 
+        static IsBraceWrappedContext(context: FormattingContext): boolean {
+            return context.contextNode.kind === SyntaxKind.ObjectBindingPattern || Rules.IsSingleLineBlockContext(context);
+        }
+
         // This check is done before an open brace in a control construct, a function, or a typescript block declaration
         static IsBeforeMultilineBlockContext(context: FormattingContext): boolean {
             return Rules.IsBeforeBlockContext(context) && !(context.NextNodeAllOnSameLine() || context.NextNodeBlockIsOnOneLine());
@@ -705,11 +762,18 @@ namespace ts.formatting {
                 case SyntaxKind.ClassDeclaration:
                 case SyntaxKind.ModuleDeclaration:
                 case SyntaxKind.EnumDeclaration:
-                case SyntaxKind.Block:
                 case SyntaxKind.CatchClause:
                 case SyntaxKind.ModuleBlock:
                 case SyntaxKind.SwitchStatement:
                     return true;
+                case SyntaxKind.Block: {
+                    const blockParent = context.currentTokenParent.parent;
+                    if (blockParent.kind !== SyntaxKind.ArrowFunction &&
+                        blockParent.kind !== SyntaxKind.FunctionExpression
+                    ) {
+                        return true;
+                    }
+                }
             }
             return false;
         }
@@ -822,6 +886,10 @@ namespace ts.formatting {
             return context.contextNode.kind === SyntaxKind.TypeLiteral; // && context.contextNode.parent.kind !== SyntaxKind.InterfaceDeclaration;
         }
 
+        static IsConstructorSignatureContext(context: FormattingContext): boolean {
+            return context.contextNode.kind === SyntaxKind.ConstructSignature;
+        }
+
         static IsTypeArgumentOrParameterOrAssertion(token: TextRangeWithKind, parent: Node): boolean {
             if (token.kind !== SyntaxKind.LessThanToken && token.kind !== SyntaxKind.GreaterThanToken) {
                 return false;
@@ -829,6 +897,7 @@ namespace ts.formatting {
             switch (parent.kind) {
                 case SyntaxKind.TypeReference:
                 case SyntaxKind.TypeAssertionExpression:
+                case SyntaxKind.TypeAliasDeclaration:
                 case SyntaxKind.ClassDeclaration:
                 case SyntaxKind.ClassExpression:
                 case SyntaxKind.InterfaceDeclaration:
@@ -865,5 +934,9 @@ namespace ts.formatting {
         static IsYieldOrYieldStarWithOperand(context: FormattingContext): boolean {
             return context.contextNode.kind === SyntaxKind.YieldExpression && (<YieldExpression>context.contextNode).expression !== undefined;
         }
+
+        static IsNonNullAssertionContext(context: FormattingContext): boolean {
+            return context.contextNode.kind === SyntaxKind.NonNullExpression;
+        }
     }
 }
\ No newline at end of file
diff --git a/src/services/formatting/rulesMap.ts b/src/services/formatting/rulesMap.ts
index 65c3090..5b4eacd 100644
--- a/src/services/formatting/rulesMap.ts
+++ b/src/services/formatting/rulesMap.ts
@@ -35,14 +35,13 @@ namespace ts.formatting {
         }
 
         private GetRuleBucketIndex(row: number, column: number): number {
+            Debug.assert(row <= SyntaxKind.LastKeyword && column <= SyntaxKind.LastKeyword, "Must compute formatting context from tokens");
             const rulesBucketIndex = (row * this.mapRowLength) + column;
-            // Debug.Assert(rulesBucketIndex < this.map.Length, "Trying to access an index outside the array.");
             return rulesBucketIndex;
         }
 
         private FillRule(rule: Rule, rulesBucketConstructionStateList: RulesBucketConstructionState[]): void {
-            const specificRule = rule.Descriptor.LeftTokenRange !== Shared.TokenRange.Any &&
-                               rule.Descriptor.RightTokenRange !== Shared.TokenRange.Any;
+            const specificRule = rule.Descriptor.LeftTokenRange.isSpecific() && rule.Descriptor.RightTokenRange.isSpecific();
 
             rule.Descriptor.LeftTokenRange.GetTokens().forEach((left) => {
                 rule.Descriptor.RightTokenRange.GetTokens().forEach((right) => {
diff --git a/src/services/formatting/rulesProvider.ts b/src/services/formatting/rulesProvider.ts
index 4a2c9d0..790bce0 100644
--- a/src/services/formatting/rulesProvider.ts
+++ b/src/services/formatting/rulesProvider.ts
@@ -5,11 +5,12 @@ namespace ts.formatting {
     export class RulesProvider {
         private globalRules: Rules;
         private options: ts.FormatCodeSettings;
-        private activeRules: Rule[];
         private rulesMap: RulesMap;
 
         constructor() {
             this.globalRules = new Rules();
+            const activeRules = this.globalRules.HighPriorityCommonRules.slice(0).concat(this.globalRules.UserConfigurableRules).concat(this.globalRules.LowPriorityCommonRules);
+            this.rulesMap = RulesMap.create(activeRules);
         }
 
         public getRuleName(rule: Rule): string {
@@ -24,129 +25,14 @@ namespace ts.formatting {
             return this.rulesMap;
         }
 
+        public getFormatOptions(): Readonly<ts.FormatCodeSettings> {
+            return this.options;
+        }
+
         public ensureUpToDate(options: ts.FormatCodeSettings) {
             if (!this.options || !ts.compareDataObjects(this.options, options)) {
-                const activeRules = this.createActiveRules(options);
-                const rulesMap = RulesMap.create(activeRules);
-
-                this.activeRules = activeRules;
-                this.rulesMap = rulesMap;
                 this.options = ts.clone(options);
             }
         }
-
-        private createActiveRules(options: ts.FormatCodeSettings): Rule[] {
-            let rules = this.globalRules.HighPriorityCommonRules.slice(0);
-
-            if (options.insertSpaceAfterCommaDelimiter) {
-                rules.push(this.globalRules.SpaceAfterComma);
-            }
-            else {
-                rules.push(this.globalRules.NoSpaceAfterComma);
-            }
-
-            if (options.insertSpaceAfterFunctionKeywordForAnonymousFunctions) {
-                rules.push(this.globalRules.SpaceAfterAnonymousFunctionKeyword);
-            }
-            else {
-                rules.push(this.globalRules.NoSpaceAfterAnonymousFunctionKeyword);
-            }
-
-            if (options.insertSpaceAfterKeywordsInControlFlowStatements) {
-                rules.push(this.globalRules.SpaceAfterKeywordInControl);
-            }
-            else {
-                rules.push(this.globalRules.NoSpaceAfterKeywordInControl);
-            }
-
-            if (options.insertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis) {
-                rules.push(this.globalRules.SpaceAfterOpenParen);
-                rules.push(this.globalRules.SpaceBeforeCloseParen);
-                rules.push(this.globalRules.NoSpaceBetweenParens);
-            }
-            else {
-                rules.push(this.globalRules.NoSpaceAfterOpenParen);
-                rules.push(this.globalRules.NoSpaceBeforeCloseParen);
-                rules.push(this.globalRules.NoSpaceBetweenParens);
-            }
-
-            if (options.insertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets) {
-                rules.push(this.globalRules.SpaceAfterOpenBracket);
-                rules.push(this.globalRules.SpaceBeforeCloseBracket);
-                rules.push(this.globalRules.NoSpaceBetweenBrackets);
-            }
-            else {
-                rules.push(this.globalRules.NoSpaceAfterOpenBracket);
-                rules.push(this.globalRules.NoSpaceBeforeCloseBracket);
-                rules.push(this.globalRules.NoSpaceBetweenBrackets);
-            }
-
-            // The default value of InsertSpaceAfterOpeningAndBeforeClosingNonemptyBraces is true
-            // so if the option is undefined, we should treat it as true as well
-            if (options.insertSpaceAfterOpeningAndBeforeClosingNonemptyBraces !== false) {
-                rules.push(this.globalRules.SpaceAfterOpenBrace);
-                rules.push(this.globalRules.SpaceBeforeCloseBrace);
-                rules.push(this.globalRules.NoSpaceBetweenEmptyBraceBrackets);
-            }
-            else {
-                rules.push(this.globalRules.NoSpaceAfterOpenBrace);
-                rules.push(this.globalRules.NoSpaceBeforeCloseBrace);
-                rules.push(this.globalRules.NoSpaceBetweenEmptyBraceBrackets);
-            }
-
-            if (options.insertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces) {
-                rules.push(this.globalRules.SpaceAfterTemplateHeadAndMiddle);
-                rules.push(this.globalRules.SpaceBeforeTemplateMiddleAndTail);
-            }
-            else {
-                rules.push(this.globalRules.NoSpaceAfterTemplateHeadAndMiddle);
-                rules.push(this.globalRules.NoSpaceBeforeTemplateMiddleAndTail);
-            }
-
-            if (options.insertSpaceAfterOpeningAndBeforeClosingJsxExpressionBraces) {
-                rules.push(this.globalRules.SpaceAfterOpenBraceInJsxExpression);
-                rules.push(this.globalRules.SpaceBeforeCloseBraceInJsxExpression);
-            }
-            else {
-                rules.push(this.globalRules.NoSpaceAfterOpenBraceInJsxExpression);
-                rules.push(this.globalRules.NoSpaceBeforeCloseBraceInJsxExpression);
-            }
-
-            if (options.insertSpaceAfterSemicolonInForStatements) {
-                rules.push(this.globalRules.SpaceAfterSemicolonInFor);
-            }
-            else {
-                rules.push(this.globalRules.NoSpaceAfterSemicolonInFor);
-            }
-
-            if (options.insertSpaceBeforeAndAfterBinaryOperators) {
-                rules.push(this.globalRules.SpaceBeforeBinaryOperator);
-                rules.push(this.globalRules.SpaceAfterBinaryOperator);
-            }
-            else {
-                rules.push(this.globalRules.NoSpaceBeforeBinaryOperator);
-                rules.push(this.globalRules.NoSpaceAfterBinaryOperator);
-            }
-
-            if (options.placeOpenBraceOnNewLineForControlBlocks) {
-                rules.push(this.globalRules.NewLineBeforeOpenBraceInControl);
-            }
-
-            if (options.placeOpenBraceOnNewLineForFunctions) {
-                rules.push(this.globalRules.NewLineBeforeOpenBraceInFunction);
-                rules.push(this.globalRules.NewLineBeforeOpenBraceInTypeScriptDeclWithBlock);
-            }
-
-            if (options.insertSpaceAfterTypeAssertion) {
-                rules.push(this.globalRules.SpaceAfterTypeAssertion);
-            }
-            else {
-                rules.push(this.globalRules.NoSpaceAfterTypeAssertion);
-            }
-
-            rules = rules.concat(this.globalRules.LowPriorityCommonRules);
-
-            return rules;
-        }
     }
 }
\ No newline at end of file
diff --git a/src/services/formatting/smartIndenter.ts b/src/services/formatting/smartIndenter.ts
index 4fffa39..18b0479 100644
--- a/src/services/formatting/smartIndenter.ts
+++ b/src/services/formatting/smartIndenter.ts
@@ -8,7 +8,19 @@ namespace ts.formatting {
             Unknown = -1
         }
 
-        export function getIndentation(position: number, sourceFile: SourceFile, options: EditorSettings): number {
+        /**
+         * Computed indentation for a given position in source file
+         * @param position - position in file
+         * @param sourceFile - target source file
+         * @param options - set of editor options that control indentation
+         * @param assumeNewLineBeforeCloseBrace - false when getIndentation is called on the text from the real source file.
+         * true - when we need to assume that position is on the newline. This is usefult for codefixes, i.e.
+         * function f() {
+         * |}
+         * when inserting some text after open brace we would like to get the value of indentation as if newline was already there.
+         * However by default indentation at position | will be 0 so 'assumeNewLineBeforeCloseBrace' allows to override this behavior,
+         */
+        export function getIndentation(position: number, sourceFile: SourceFile, options: EditorSettings, assumeNewLineBeforeCloseBrace = false): number {
             if (position > sourceFile.text.length) {
                 return getBaseIndentation(options); // past EOF
             }
@@ -42,7 +54,7 @@ namespace ts.formatting {
                 let current = position;
                 while (current > 0) {
                     const char = sourceFile.text.charCodeAt(current);
-                    if (!isWhiteSpace(char)) {
+                    if (!isWhiteSpaceLike(char)) {
                         break;
                     }
                     current--;
@@ -71,13 +83,14 @@ namespace ts.formatting {
                 if (positionBelongsToNode(current, position, sourceFile) && shouldIndentChildNode(current, previous)) {
                     currentStart = getStartLineAndCharacterForNode(current, sourceFile);
 
-                    if (nextTokenIsCurlyBraceOnSameLineAsCursor(precedingToken, current, lineAtPosition, sourceFile)) {
-                        indentationDelta = 0;
+                    const nextTokenKind = nextTokenIsCurlyBraceOnSameLineAsCursor(precedingToken, current, lineAtPosition, sourceFile);
+                    if (nextTokenKind !== NextTokenKind.Unknown) {
+                        // handle cases when codefix is about to be inserted before the close brace
+                        indentationDelta = assumeNewLineBeforeCloseBrace && nextTokenKind === NextTokenKind.CloseBrace ? options.indentSize : 0;
                     }
                     else {
                         indentationDelta = lineAtPosition !== currentStart.line ? options.indentSize : 0;
                     }
-
                     break;
                 }
 
@@ -218,15 +231,21 @@ namespace ts.formatting {
             return findColumnForFirstNonWhitespaceCharacterInLine(currentLineAndChar, sourceFile, options);
         }
 
-        function nextTokenIsCurlyBraceOnSameLineAsCursor(precedingToken: Node, current: Node, lineAtPosition: number, sourceFile: SourceFile): boolean {
+        const enum NextTokenKind {
+            Unknown,
+            OpenBrace,
+            CloseBrace
+        }
+
+        function nextTokenIsCurlyBraceOnSameLineAsCursor(precedingToken: Node, current: Node, lineAtPosition: number, sourceFile: SourceFile): NextTokenKind {
             const nextToken = findNextToken(precedingToken, current);
             if (!nextToken) {
-                return false;
+                return NextTokenKind.Unknown;
             }
 
             if (nextToken.kind === SyntaxKind.OpenBraceToken) {
                 // open braces are always indented at the parent level
-                return true;
+                return NextTokenKind.OpenBrace;
             }
             else if (nextToken.kind === SyntaxKind.CloseBraceToken) {
                 // close braces are indented at the parent level if they are located on the same line with cursor
@@ -239,17 +258,17 @@ namespace ts.formatting {
                 // $}
 
                 const nextTokenStartLine = getStartLineAndCharacterForNode(nextToken, sourceFile).line;
-                return lineAtPosition === nextTokenStartLine;
+                return lineAtPosition === nextTokenStartLine ? NextTokenKind.CloseBrace : NextTokenKind.Unknown;
             }
 
-            return false;
+            return NextTokenKind.Unknown;
         }
 
-        function getStartLineAndCharacterForNode(n: Node, sourceFile: SourceFile): LineAndCharacter {
+        function getStartLineAndCharacterForNode(n: Node, sourceFile: SourceFileLike): LineAndCharacter {
             return sourceFile.getLineAndCharacterOfPosition(n.getStart(sourceFile));
         }
 
-        export function childStartsOnTheSameLineWithElseInIfStatement(parent: Node, child: TextRangeWithKind, childStartLine: number, sourceFile: SourceFile): boolean {
+        export function childStartsOnTheSameLineWithElseInIfStatement(parent: Node, child: TextRangeWithKind, childStartLine: number, sourceFile: SourceFileLike): boolean {
             if (parent.kind === SyntaxKind.IfStatement && (<IfStatement>parent).elseStatement === child) {
                 const elseKeyword = findChildOfKind(parent, SyntaxKind.ElseKeyword, sourceFile);
                 Debug.assert(elseKeyword !== undefined);
@@ -261,15 +280,15 @@ namespace ts.formatting {
             return false;
         }
 
-        function getContainingList(node: Node, sourceFile: SourceFile): NodeArray<Node> {
+        function getListIfStartEndIsInListRange(list: NodeArray<Node>, start: number, end: number) {
+            return list && rangeContainsStartEnd(list, start, end) ? list : undefined;
+        }
+
+        export function getContainingList(node: Node, sourceFile: SourceFile): NodeArray<Node> {
             if (node.parent) {
                 switch (node.parent.kind) {
                     case SyntaxKind.TypeReference:
-                        if ((<TypeReferenceNode>node.parent).typeArguments &&
-                            rangeContainsStartEnd((<TypeReferenceNode>node.parent).typeArguments, node.getStart(sourceFile), node.getEnd())) {
-                            return (<TypeReferenceNode>node.parent).typeArguments;
-                        }
-                        break;
+                        return getListIfStartEndIsInListRange((<TypeReferenceNode>node.parent).typeArguments, node.getStart(sourceFile), node.getEnd());
                     case SyntaxKind.ObjectLiteralExpression:
                         return (<ObjectLiteralExpression>node.parent).properties;
                     case SyntaxKind.ArrayLiteralExpression:
@@ -280,30 +299,26 @@ namespace ts.formatting {
                     case SyntaxKind.MethodDeclaration:
                     case SyntaxKind.MethodSignature:
                     case SyntaxKind.CallSignature:
+                    case SyntaxKind.Constructor:
+                    case SyntaxKind.ConstructorType:
                     case SyntaxKind.ConstructSignature: {
                         const start = node.getStart(sourceFile);
-                        if ((<SignatureDeclaration>node.parent).typeParameters &&
-                            rangeContainsStartEnd((<SignatureDeclaration>node.parent).typeParameters, start, node.getEnd())) {
-                            return (<SignatureDeclaration>node.parent).typeParameters;
-                        }
-                        if (rangeContainsStartEnd((<SignatureDeclaration>node.parent).parameters, start, node.getEnd())) {
-                            return (<SignatureDeclaration>node.parent).parameters;
-                        }
-                        break;
+                        return getListIfStartEndIsInListRange((<SignatureDeclaration>node.parent).typeParameters, start, node.getEnd()) ||
+                            getListIfStartEndIsInListRange((<SignatureDeclaration>node.parent).parameters, start, node.getEnd());
                     }
+                    case SyntaxKind.ClassDeclaration:
+                        return getListIfStartEndIsInListRange((<ClassDeclaration>node.parent).typeParameters, node.getStart(sourceFile), node.getEnd());
                     case SyntaxKind.NewExpression:
                     case SyntaxKind.CallExpression: {
                         const start = node.getStart(sourceFile);
-                        if ((<CallExpression>node.parent).typeArguments &&
-                            rangeContainsStartEnd((<CallExpression>node.parent).typeArguments, start, node.getEnd())) {
-                            return (<CallExpression>node.parent).typeArguments;
-                        }
-                        if ((<CallExpression>node.parent).arguments &&
-                            rangeContainsStartEnd((<CallExpression>node.parent).arguments, start, node.getEnd())) {
-                            return (<CallExpression>node.parent).arguments;
-                        }
-                        break;
+                        return getListIfStartEndIsInListRange((<CallExpression>node.parent).typeArguments, start, node.getEnd()) ||
+                            getListIfStartEndIsInListRange((<CallExpression>node.parent).arguments, start, node.getEnd());
                     }
+                    case SyntaxKind.VariableDeclarationList:
+                        return getListIfStartEndIsInListRange((<VariableDeclarationList>node.parent).declarations, node.getStart(sourceFile), node.getEnd());
+                    case SyntaxKind.NamedImports:
+                    case SyntaxKind.NamedExports:
+                        return getListIfStartEndIsInListRange((<NamedImportsOrExports>node.parent).elements, node.getStart(sourceFile), node.getEnd());
                 }
             }
             return undefined;
@@ -326,13 +341,10 @@ namespace ts.formatting {
                 return Value.Unknown;
             }
 
-            if (node.parent && (
-                node.parent.kind === SyntaxKind.CallExpression ||
-                node.parent.kind === SyntaxKind.NewExpression) &&
-                (<CallExpression>node.parent).expression !== node) {
+            if (node.parent && isCallOrNewExpression(node.parent) && (<CallExpression>node.parent).expression !== node) {
 
                 const fullCallOrNewExpression = (<CallExpression | NewExpression>node.parent).expression;
-                const startingExpression = getStartingExpression(<PropertyAccessExpression | CallExpression | ElementAccessExpression>fullCallOrNewExpression);
+                const startingExpression = getStartingExpression(fullCallOrNewExpression);
 
                 if (fullCallOrNewExpression === startingExpression) {
                     return Value.Unknown;
@@ -350,15 +362,14 @@ namespace ts.formatting {
 
             return Value.Unknown;
 
-            function getStartingExpression(node: PropertyAccessExpression | CallExpression | ElementAccessExpression) {
+            function getStartingExpression(node: Expression) {
                 while (true) {
                     switch (node.kind) {
                         case SyntaxKind.CallExpression:
                         case SyntaxKind.NewExpression:
                         case SyntaxKind.PropertyAccessExpression:
                         case SyntaxKind.ElementAccessExpression:
-
-                            node = <PropertyAccessExpression | CallExpression | ElementAccessExpression | PropertyAccessExpression>node.expression;
+                            node = (<PropertyAccessExpression | CallExpression | NewExpression | ElementAccessExpression | PropertyAccessExpression>node).expression;
                             break;
                         default:
                             return node;
@@ -401,7 +412,7 @@ namespace ts.formatting {
             value of 'character' for '$' is 3
             value of 'column' for '$' is 6 (assuming that tab size is 4)
         */
-        export function findFirstNonWhitespaceCharacterAndColumn(startPos: number, endPos: number, sourceFile: SourceFile, options: EditorSettings) {
+        export function findFirstNonWhitespaceCharacterAndColumn(startPos: number, endPos: number, sourceFile: SourceFileLike, options: EditorSettings) {
             let character = 0;
             let column = 0;
             for (let pos = startPos; pos < endPos; pos++) {
@@ -422,7 +433,7 @@ namespace ts.formatting {
             return { column, character };
         }
 
-        export function findFirstNonWhitespaceColumn(startPos: number, endPos: number, sourceFile: SourceFile, options: EditorSettings): number {
+        export function findFirstNonWhitespaceColumn(startPos: number, endPos: number, sourceFile: SourceFileLike, options: EditorSettings): number {
             return findFirstNonWhitespaceCharacterAndColumn(startPos, endPos, sourceFile, options).column;
         }
 
@@ -439,6 +450,7 @@ namespace ts.formatting {
                 case SyntaxKind.ModuleBlock:
                 case SyntaxKind.ObjectLiteralExpression:
                 case SyntaxKind.TypeLiteral:
+                case SyntaxKind.MappedType:
                 case SyntaxKind.TupleType:
                 case SyntaxKind.CaseBlock:
                 case SyntaxKind.DefaultClause:
diff --git a/src/services/formatting/tokenRange.ts b/src/services/formatting/tokenRange.ts
index 0e4ec4d..2985527 100644
--- a/src/services/formatting/tokenRange.ts
+++ b/src/services/formatting/tokenRange.ts
@@ -3,22 +3,13 @@
 /* @internal */
 namespace ts.formatting {
     export namespace Shared {
-        export interface ITokenAccess {
-            GetTokens(): SyntaxKind[];
-            Contains(token: SyntaxKind): boolean;
+        const allTokens: SyntaxKind[] = [];
+        for (let token = SyntaxKind.FirstToken; token <= SyntaxKind.LastToken; token++) {
+            allTokens.push(token);
         }
 
-        export class TokenRangeAccess implements ITokenAccess {
-            private tokens: SyntaxKind[];
-
-            constructor(from: SyntaxKind, to: SyntaxKind, except: SyntaxKind[]) {
-                this.tokens = [];
-                for (let token = from; token <= to; token++) {
-                    if (ts.indexOf(except, token) < 0) {
-                        this.tokens.push(token);
-                    }
-                }
-            }
+        class TokenValuesAccess implements TokenRange {
+            constructor(private readonly tokens: SyntaxKind[] = []) { }
 
             public GetTokens(): SyntaxKind[] {
                 return this.tokens;
@@ -27,27 +18,12 @@ namespace ts.formatting {
             public Contains(token: SyntaxKind): boolean {
                 return this.tokens.indexOf(token) >= 0;
             }
-        }
 
-        export class TokenValuesAccess implements ITokenAccess {
-            private tokens: SyntaxKind[];
-
-            constructor(tks: SyntaxKind[]) {
-                this.tokens = tks && tks.length ? tks : <SyntaxKind[]>[];
-            }
-
-            public GetTokens(): SyntaxKind[] {
-                return this.tokens;
-            }
-
-            public Contains(token: SyntaxKind): boolean {
-                return this.tokens.indexOf(token) >= 0;
-            }
+            public isSpecific() { return true; }
         }
 
-        export class TokenSingleValueAccess implements ITokenAccess {
-            constructor(public token: SyntaxKind) {
-            }
+        class TokenSingleValueAccess implements TokenRange {
+            constructor(private readonly token: SyntaxKind) {}
 
             public GetTokens(): SyntaxKind[] {
                 return [this.token];
@@ -56,71 +32,92 @@ namespace ts.formatting {
             public Contains(tokenValue: SyntaxKind): boolean {
                 return tokenValue === this.token;
             }
+
+            public isSpecific() { return true; }
         }
 
-        export class TokenAllAccess implements ITokenAccess {
+        class TokenAllAccess implements TokenRange {
             public GetTokens(): SyntaxKind[] {
-                const result: SyntaxKind[] = [];
-                for (let token = SyntaxKind.FirstToken; token <= SyntaxKind.LastToken; token++) {
-                    result.push(token);
-                }
-                return result;
+                return allTokens;
             }
 
-            public Contains(tokenValue: SyntaxKind): boolean {
+            public Contains(): boolean {
                 return true;
             }
 
             public toString(): string {
                 return "[allTokens]";
             }
-        }
 
-        export class TokenRange {
-            constructor(public tokenAccess: ITokenAccess) {
-            }
+            public isSpecific() { return false; }
+        }
 
-            static FromToken(token: SyntaxKind): TokenRange {
-                return new TokenRange(new TokenSingleValueAccess(token));
-            }
+        class TokenAllExceptAccess implements TokenRange {
+            constructor(private readonly except: SyntaxKind) {}
 
-            static FromTokens(tokens: SyntaxKind[]): TokenRange {
-                return new TokenRange(new TokenValuesAccess(tokens));
+            public GetTokens(): SyntaxKind[] {
+                return allTokens.filter(t => t !== this.except);
             }
 
-            static FromRange(f: SyntaxKind, to: SyntaxKind, except: SyntaxKind[] = []): TokenRange {
-                return new TokenRange(new TokenRangeAccess(f, to, except));
+            public Contains(token: SyntaxKind): boolean {
+                return token !== this.except;
             }
 
-            static AllTokens(): TokenRange {
-                return new TokenRange(new TokenAllAccess());
-            }
+            public isSpecific() { return false; }
+        }
 
-            public GetTokens(): SyntaxKind[] {
-                return this.tokenAccess.GetTokens();
-            }
+        export interface TokenRange {
+            GetTokens(): SyntaxKind[];
+            Contains(token: SyntaxKind): boolean;
+            isSpecific(): boolean;
+        }
 
-            public Contains(token: SyntaxKind): boolean {
-                return this.tokenAccess.Contains(token);
+        export namespace TokenRange {
+            export function FromToken(token: SyntaxKind): TokenRange {
+                return new TokenSingleValueAccess(token);
             }
 
-            public toString(): string {
-                return this.tokenAccess.toString();
+            export function FromTokens(tokens: SyntaxKind[]): TokenRange {
+                return new TokenValuesAccess(tokens);
             }
 
-            static Any: TokenRange = TokenRange.AllTokens();
-            static AnyIncludingMultilineComments = TokenRange.FromTokens(TokenRange.Any.GetTokens().concat([SyntaxKind.MultiLineCommentTrivia]));
-            static Keywords = TokenRange.FromRange(SyntaxKind.FirstKeyword, SyntaxKind.LastKeyword);
-            static BinaryOperators = TokenRange.FromRange(SyntaxKind.FirstBinaryOperator, SyntaxKind.LastBinaryOperator);
-            static BinaryKeywordOperators = TokenRange.FromTokens([SyntaxKind.InKeyword, SyntaxKind.InstanceOfKeyword, SyntaxKind.OfKeyword, SyntaxKind.AsKeyword, SyntaxKind.IsKeyword]);
-            static UnaryPrefixOperators = TokenRange.FromTokens([SyntaxKind.PlusPlusToken, SyntaxKind.MinusMinusToken, SyntaxKind.TildeToken, SyntaxKind.ExclamationToken]);
-            static UnaryPrefixExpressions = TokenRange.FromTokens([SyntaxKind.NumericLiteral, SyntaxKind.Identifier, SyntaxKind.OpenParenToken, SyntaxKind.OpenBracketToken, SyntaxKind.OpenBraceToken, SyntaxKind.ThisKeyword, SyntaxKind.NewKeyword]);
-            static UnaryPreincrementExpressions = TokenRange.FromTokens([SyntaxKind.Identifier, SyntaxKind.OpenParenToken, SyntaxKind.ThisKeyword, SyntaxKind.NewKeyword]);
-            static UnaryPostincrementExpressions = TokenRange.FromTokens([SyntaxKind.Identifier, SyntaxKind.CloseParenToken, SyntaxKind.CloseBracketToken, SyntaxKind.NewKeyword]);
-            static UnaryPredecrementExpressions = TokenRange.FromTokens([SyntaxKind.Identifier, SyntaxKind.OpenParenToken, SyntaxKind.ThisKeyword, SyntaxKind.NewKeyword]);
-            static UnaryPostdecrementExpressions = TokenRange.FromTokens([SyntaxKind.Identifier, SyntaxKind.CloseParenToken, SyntaxKind.CloseBracketToken, SyntaxKind.NewKeyword]);
-            static Comments = TokenRange.FromTokens([SyntaxKind.SingleLineCommentTrivia, SyntaxKind.MultiLineCommentTrivia]);
-            static TypeNames = TokenRange.FromTokens([SyntaxKind.Identifier, SyntaxKind.NumberKeyword, SyntaxKind.StringKeyword, SyntaxKind.BooleanKeyword, SyntaxKind.SymbolKeyword, SyntaxKind.VoidKeyword, SyntaxKind.AnyKeyword]);
+            export function FromRange(from: SyntaxKind, to: SyntaxKind, except: SyntaxKind[] = []): TokenRange {
+                const tokens: SyntaxKind[] = [];
+                for (let token = from; token <= to; token++) {
+                    if (ts.indexOf(except, token) < 0) {
+                        tokens.push(token);
+                    }
+                }
+                return new TokenValuesAccess(tokens);
+            }
+
+            export function AnyExcept(token: SyntaxKind): TokenRange {
+                return new TokenAllExceptAccess(token);
+            }
+
+            export const Any: TokenRange = new TokenAllAccess();
+            export const AnyIncludingMultilineComments = TokenRange.FromTokens([...allTokens, SyntaxKind.MultiLineCommentTrivia]);
+            export const Keywords = TokenRange.FromRange(SyntaxKind.FirstKeyword, SyntaxKind.LastKeyword);
+            export const BinaryOperators = TokenRange.FromRange(SyntaxKind.FirstBinaryOperator, SyntaxKind.LastBinaryOperator);
+            export const BinaryKeywordOperators = TokenRange.FromTokens([
+                SyntaxKind.InKeyword, SyntaxKind.InstanceOfKeyword, SyntaxKind.OfKeyword, SyntaxKind.AsKeyword, SyntaxKind.IsKeyword]);
+            export const UnaryPrefixOperators = TokenRange.FromTokens([
+                SyntaxKind.PlusPlusToken, SyntaxKind.MinusMinusToken, SyntaxKind.TildeToken, SyntaxKind.ExclamationToken]);
+            export const UnaryPrefixExpressions = TokenRange.FromTokens([
+                SyntaxKind.NumericLiteral, SyntaxKind.Identifier, SyntaxKind.OpenParenToken, SyntaxKind.OpenBracketToken,
+                SyntaxKind.OpenBraceToken, SyntaxKind.ThisKeyword, SyntaxKind.NewKeyword]);
+            export const UnaryPreincrementExpressions = TokenRange.FromTokens([
+                SyntaxKind.Identifier, SyntaxKind.OpenParenToken, SyntaxKind.ThisKeyword, SyntaxKind.NewKeyword]);
+            export const UnaryPostincrementExpressions = TokenRange.FromTokens([
+                SyntaxKind.Identifier, SyntaxKind.CloseParenToken, SyntaxKind.CloseBracketToken, SyntaxKind.NewKeyword]);
+            export const UnaryPredecrementExpressions = TokenRange.FromTokens([
+                SyntaxKind.Identifier, SyntaxKind.OpenParenToken, SyntaxKind.ThisKeyword, SyntaxKind.NewKeyword]);
+            export const UnaryPostdecrementExpressions = TokenRange.FromTokens([
+                SyntaxKind.Identifier, SyntaxKind.CloseParenToken, SyntaxKind.CloseBracketToken, SyntaxKind.NewKeyword]);
+            export const Comments = TokenRange.FromTokens([SyntaxKind.SingleLineCommentTrivia, SyntaxKind.MultiLineCommentTrivia]);
+            export const TypeNames = TokenRange.FromTokens([
+                SyntaxKind.Identifier, SyntaxKind.NumberKeyword, SyntaxKind.StringKeyword, SyntaxKind.BooleanKeyword,
+                SyntaxKind.SymbolKeyword, SyntaxKind.VoidKeyword, SyntaxKind.AnyKeyword]);
         }
     }
 }
diff --git a/src/services/goToDefinition.ts b/src/services/goToDefinition.ts
index 4c00564..ac60ba7 100644
--- a/src/services/goToDefinition.ts
+++ b/src/services/goToDefinition.ts
@@ -8,20 +8,18 @@ namespace ts.GoToDefinition {
             if (referenceFile) {
                 return [getDefinitionInfoForFileReference(comment.fileName, referenceFile.fileName)];
             }
-            return undefined;
+            // Might still be on jsdoc, so keep looking.
         }
 
         // Type reference directives
         const typeReferenceDirective = findReferenceInPosition(sourceFile.typeReferenceDirectives, position);
         if (typeReferenceDirective) {
-            const referenceFile = program.getResolvedTypeReferenceDirectives()[typeReferenceDirective.fileName];
-            if (referenceFile && referenceFile.resolvedFileName) {
-                return [getDefinitionInfoForFileReference(typeReferenceDirective.fileName, referenceFile.resolvedFileName)];
-            }
-            return undefined;
+            const referenceFile = program.getResolvedTypeReferenceDirectives().get(typeReferenceDirective.fileName);
+            return referenceFile && referenceFile.resolvedFileName &&
+                [getDefinitionInfoForFileReference(typeReferenceDirective.fileName, referenceFile.resolvedFileName)];
         }
 
-        const node = getTouchingPropertyName(sourceFile, position);
+        const node = getTouchingPropertyName(sourceFile, position, /*includeJsDocComment*/ true);
         if (node === sourceFile) {
             return undefined;
         }
@@ -30,7 +28,7 @@ namespace ts.GoToDefinition {
         if (isJumpStatementTarget(node)) {
             const labelName = (<Identifier>node).text;
             const label = getTargetLabel((<BreakOrContinueStatement>node.parent), (<Identifier>node).text);
-            return label ? [createDefinitionInfo(label, ScriptElementKind.label, labelName, /*containerName*/ undefined)] : undefined;
+            return label ? [createDefinitionInfoFromName(label, ScriptElementKind.label, labelName, /*containerName*/ undefined)] : undefined;
         }
 
         const typeChecker = program.getTypeChecker();
@@ -52,19 +50,10 @@ namespace ts.GoToDefinition {
         // get the aliased symbol instead. This allows for goto def on an import e.g.
         //   import {A, B} from "mod";
         // to jump to the implementation directly.
-        if (symbol.flags & SymbolFlags.Alias) {
-            const declaration = symbol.declarations[0];
-
-            // Go to the original declaration for cases:
-            //
-            //   (1) when the aliased symbol was declared in the location(parent).
-            //   (2) when the aliased symbol is originating from a named import.
-            //
-            if (node.kind === SyntaxKind.Identifier &&
-                (node.parent === declaration ||
-                (declaration.kind === SyntaxKind.ImportSpecifier && declaration.parent && declaration.parent.kind === SyntaxKind.NamedImports))) {
-
-                symbol = typeChecker.getAliasedSymbol(symbol);
+        if (symbol.flags & SymbolFlags.Alias && shouldSkipAlias(node, symbol.declarations[0])) {
+            const aliased = typeChecker.getAliasedSymbol(symbol);
+            if (aliased.declarations) {
+                symbol = aliased;
             }
         }
 
@@ -87,12 +76,26 @@ namespace ts.GoToDefinition {
                 declaration => createDefinitionInfo(declaration, shorthandSymbolKind, shorthandSymbolName, shorthandContainerName));
         }
 
+        // If the current location we want to find its definition is in an object literal, try to get the contextual type for the
+        // object literal, lookup the property symbol in the contextual type, and use this for goto-definition.
+        // For example
+        //      interface Props{
+        //          /*first*/prop1: number
+        //          prop2: boolean
+        //      }
+        //      function Foo(arg: Props) {}
+        //      Foo( { pr/*1*/op1: 10, prop2: true })
+        const element = getContainingObjectLiteralElement(node);
+        if (element && typeChecker.getContextualType(element.parent as Expression)) {
+            return flatMap(getPropertySymbolsFromContextualType(typeChecker, element), propertySymbol =>
+                getDefinitionFromSymbol(typeChecker, propertySymbol, node));
+        }
         return getDefinitionFromSymbol(typeChecker, symbol, node);
     }
 
     /// Goto type
     export function getTypeDefinitionAtPosition(typeChecker: TypeChecker, sourceFile: SourceFile, position: number): DefinitionInfo[] {
-        const node = getTouchingPropertyName(sourceFile, position);
+        const node = getTouchingPropertyName(sourceFile, position, /*includeJsDocComment*/ true);
         if (node === sourceFile) {
             return undefined;
         }
@@ -124,6 +127,29 @@ namespace ts.GoToDefinition {
         return getDefinitionFromSymbol(typeChecker, type.symbol, node);
     }
 
+    // Go to the original declaration for cases:
+    //
+    //   (1) when the aliased symbol was declared in the location(parent).
+    //   (2) when the aliased symbol is originating from an import.
+    //
+    function shouldSkipAlias(node: Node, declaration: Node): boolean {
+        if (node.kind !== SyntaxKind.Identifier) {
+            return false;
+        }
+        if (node.parent === declaration) {
+            return true;
+        }
+        switch (declaration.kind) {
+            case SyntaxKind.ImportClause:
+            case SyntaxKind.ImportEqualsDeclaration:
+                return true;
+            case SyntaxKind.ImportSpecifier:
+                return declaration.parent.kind === SyntaxKind.NamedImports;
+            default:
+                return false;
+        }
+    }
+
     function getDefinitionFromSymbol(typeChecker: TypeChecker, symbol: Symbol, node: Node): DefinitionInfo[] {
         const result: DefinitionInfo[] = [];
         const declarations = symbol.getDeclarations();
@@ -139,7 +165,7 @@ namespace ts.GoToDefinition {
 
         return result;
 
-        function tryAddConstructSignature(symbol: Symbol, location: Node, symbolKind: string, symbolName: string, containerName: string, result: DefinitionInfo[]) {
+        function tryAddConstructSignature(symbol: Symbol, location: Node, symbolKind: ScriptElementKind, symbolName: string, containerName: string, result: DefinitionInfo[]) {
             // Applicable only if we are in a new expression, or we are on a constructor declaration
             // and in either case the symbol has a construct signature definition, i.e. class
             if (isNewExpressionTarget(location) || location.kind === SyntaxKind.ConstructorKeyword) {
@@ -147,12 +173,8 @@ namespace ts.GoToDefinition {
                     // Find the first class-like declaration and try to get the construct signature.
                     for (const declaration of symbol.getDeclarations()) {
                         if (isClassLike(declaration)) {
-                            return tryAddSignature(declaration.members,
-                                                    /*selectConstructors*/ true,
-                                                    symbolKind,
-                                                    symbolName,
-                                                    containerName,
-                                                    result);
+                            return tryAddSignature(
+                                declaration.members, /*selectConstructors*/ true, symbolKind, symbolName, containerName, result);
                         }
                     }
 
@@ -162,42 +184,59 @@ namespace ts.GoToDefinition {
             return false;
         }
 
-        function tryAddCallSignature(symbol: Symbol, location: Node, symbolKind: string, symbolName: string, containerName: string, result: DefinitionInfo[]) {
+        function tryAddCallSignature(symbol: Symbol, location: Node, symbolKind: ScriptElementKind, symbolName: string, containerName: string, result: DefinitionInfo[]) {
             if (isCallExpressionTarget(location) || isNewExpressionTarget(location) || isNameOfFunctionDeclaration(location)) {
                 return tryAddSignature(symbol.declarations, /*selectConstructors*/ false, symbolKind, symbolName, containerName, result);
             }
             return false;
         }
 
-        function tryAddSignature(signatureDeclarations: Declaration[], selectConstructors: boolean, symbolKind: string, symbolName: string, containerName: string, result: DefinitionInfo[]) {
+        function tryAddSignature(signatureDeclarations: Declaration[] | undefined, selectConstructors: boolean, symbolKind: ScriptElementKind, symbolName: string, containerName: string, result: DefinitionInfo[]) {
+            if (!signatureDeclarations) {
+                return false;
+            }
+
             const declarations: Declaration[] = [];
-            let definition: Declaration;
+            let definition: Declaration | undefined;
 
-            forEach(signatureDeclarations, d => {
-                if ((selectConstructors && d.kind === SyntaxKind.Constructor) ||
-                    (!selectConstructors && (d.kind === SyntaxKind.FunctionDeclaration || d.kind === SyntaxKind.MethodDeclaration || d.kind === SyntaxKind.MethodSignature))) {
+            for (const d of signatureDeclarations) {
+                if (selectConstructors ? d.kind === SyntaxKind.Constructor : isSignatureDeclaration(d)) {
                     declarations.push(d);
                     if ((<FunctionLikeDeclaration>d).body) definition = d;
                 }
-            });
-
-            if (definition) {
-                result.push(createDefinitionInfo(definition, symbolKind, symbolName, containerName));
-                return true;
             }
-            else if (declarations.length) {
-                result.push(createDefinitionInfo(lastOrUndefined(declarations), symbolKind, symbolName, containerName));
+
+            if (declarations.length) {
+                result.push(createDefinitionInfo(definition || lastOrUndefined(declarations), symbolKind, symbolName, containerName));
                 return true;
             }
-
             return false;
         }
     }
 
-    function createDefinitionInfo(node: Node, symbolKind: string, symbolName: string, containerName: string): DefinitionInfo {
+    function isSignatureDeclaration(node: Node): boolean {
+        switch (node.kind) {
+            case ts.SyntaxKind.Constructor:
+            case ts.SyntaxKind.FunctionDeclaration:
+            case ts.SyntaxKind.MethodDeclaration:
+            case ts.SyntaxKind.MethodSignature:
+                return true;
+            default:
+                return false;
+        }
+    }
+
+    /** Creates a DefinitionInfo from a Declaration, using the declaration's name if possible. */
+    function createDefinitionInfo(node: Declaration, symbolKind: ScriptElementKind, symbolName: string, containerName: string): DefinitionInfo {
+        return createDefinitionInfoFromName(getNameOfDeclaration(node) || node, symbolKind, symbolName, containerName);
+    }
+
+    /** Creates a DefinitionInfo directly from the name of a declaration. */
+    function createDefinitionInfoFromName(name: Node, symbolKind: ScriptElementKind, symbolName: string, containerName: string): DefinitionInfo {
+        const sourceFile = name.getSourceFile();
         return {
-            fileName: node.getSourceFile().fileName,
-            textSpan: createTextSpanFromBounds(node.getStart(), node.getEnd()),
+            fileName: sourceFile.fileName,
+            textSpan: createTextSpanFromNode(name, sourceFile),
             kind: symbolKind,
             name: symbolName,
             containerKind: undefined,
@@ -220,7 +259,7 @@ namespace ts.GoToDefinition {
 
     function findReferenceInPosition(refs: FileReference[], pos: number): FileReference {
         for (const ref of refs) {
-            if (ref.pos <= pos && pos < ref.end) {
+            if (ref.pos <= pos && pos <= ref.end) {
                 return ref;
             }
         }
@@ -251,6 +290,14 @@ namespace ts.GoToDefinition {
 
     function tryGetSignatureDeclaration(typeChecker: TypeChecker, node: Node): SignatureDeclaration | undefined {
         const callLike = getAncestorCallLikeExpression(node);
-        return callLike && typeChecker.getResolvedSignature(callLike).declaration;
+        const signature = callLike && typeChecker.getResolvedSignature(callLike);
+        if (signature) {
+            const decl = signature.declaration;
+            if (decl && isSignatureDeclaration(decl)) {
+                return decl;
+            }
+        }
+        // Don't go to a function type, go to the value having that type.
+        return undefined;
     }
 }
diff --git a/src/services/importTracker.ts b/src/services/importTracker.ts
new file mode 100644
index 0000000..5e8e7b8
--- /dev/null
+++ b/src/services/importTracker.ts
@@ -0,0 +1,650 @@
+/* Code for finding imports of an exported symbol. Used only by FindAllReferences. */
+/* @internal */
+namespace ts.FindAllReferences {
+    export interface ImportsResult {
+        /** For every import of the symbol, the location and local symbol for the import. */
+        importSearches: Array<[Identifier, Symbol]>;
+        /** For rename imports/exports `{ foo as bar }`, `foo` is not a local, so it may be added as a reference immediately without further searching. */
+        singleReferences: Identifier[];
+        /** List of source files that may (or may not) use the symbol via a namespace. (For UMD modules this is every file.) */
+        indirectUsers: SourceFile[];
+    }
+    export type ImportTracker = (exportSymbol: Symbol, exportInfo: ExportInfo, isForRename: boolean) => ImportsResult;
+
+    /** Creates the imports map and returns an ImportTracker that uses it. Call this lazily to avoid calling `getDirectImportsMap` unnecessarily.  */
+    export function createImportTracker(sourceFiles: SourceFile[], checker: TypeChecker, cancellationToken: CancellationToken): ImportTracker {
+        const allDirectImports = getDirectImportsMap(sourceFiles, checker, cancellationToken);
+        return (exportSymbol, exportInfo, isForRename) => {
+            const { directImports, indirectUsers } = getImportersForExport(sourceFiles, allDirectImports, exportInfo, checker, cancellationToken);
+            return { indirectUsers, ...getSearchesFromDirectImports(directImports, exportSymbol, exportInfo.exportKind, checker, isForRename) };
+        };
+    }
+
+    /** Info about an exported symbol to perform recursive search on. */
+    export interface ExportInfo {
+        exportingModuleSymbol: Symbol;
+        exportKind: ExportKind;
+    }
+
+    export const enum ExportKind { Named, Default, ExportEquals }
+
+    export const enum ImportExport { Import, Export }
+
+    interface AmbientModuleDeclaration extends ModuleDeclaration { body?: ModuleBlock; }
+    type SourceFileLike = SourceFile | AmbientModuleDeclaration;
+    // Identifier for the case of `const x = require("y")`.
+    type Importer = AnyImportSyntax | Identifier | ExportDeclaration;
+    type ImporterOrCallExpression = Importer | CallExpression;
+
+    /** Returns import statements that directly reference the exporting module, and a list of files that may access the module through a namespace. */
+    function getImportersForExport(
+            sourceFiles: SourceFile[],
+            allDirectImports: Map<ImporterOrCallExpression[]>,
+            { exportingModuleSymbol, exportKind }: ExportInfo,
+            checker: TypeChecker,
+            cancellationToken: CancellationToken
+            ): { directImports: Importer[], indirectUsers: SourceFile[] } {
+        const markSeenDirectImport = nodeSeenTracker<ImporterOrCallExpression>();
+        const markSeenIndirectUser = nodeSeenTracker<SourceFileLike>();
+        const directImports: Importer[] = [];
+        const isAvailableThroughGlobal = !!exportingModuleSymbol.globalExports;
+        const indirectUserDeclarations: SourceFileLike[] = isAvailableThroughGlobal ? undefined : [];
+
+        handleDirectImports(exportingModuleSymbol);
+
+        return { directImports, indirectUsers: getIndirectUsers() };
+
+        function getIndirectUsers(): SourceFile[] {
+            if (isAvailableThroughGlobal) {
+                // It has `export as namespace`, so anything could potentially use it.
+                return sourceFiles;
+            }
+
+            // Module augmentations may use this module's exports without importing it.
+            for (const decl of exportingModuleSymbol.declarations) {
+                if (isExternalModuleAugmentation(decl)) {
+                    addIndirectUser(decl as SourceFileLike);
+                }
+            }
+
+            // This may return duplicates (if there are multiple module declarations in a single source file, all importing the same thing as a namespace), but `State.markSearchedSymbol` will handle that.
+            return indirectUserDeclarations.map(getSourceFileOfNode);
+        }
+
+        function handleDirectImports(exportingModuleSymbol: Symbol): void {
+            const theseDirectImports = getDirectImports(exportingModuleSymbol);
+            if (theseDirectImports) {
+                for (const direct of theseDirectImports) {
+                    if (!markSeenDirectImport(direct)) {
+                        continue;
+                    }
+
+                    cancellationToken.throwIfCancellationRequested();
+
+                    switch (direct.kind) {
+                        case SyntaxKind.CallExpression:
+                            if (!isAvailableThroughGlobal) {
+                                const parent = direct.parent!;
+                                if (exportKind === ExportKind.ExportEquals && parent.kind === SyntaxKind.VariableDeclaration) {
+                                    const { name } = parent as ts.VariableDeclaration;
+                                    if (name.kind === SyntaxKind.Identifier) {
+                                        directImports.push(name);
+                                        break;
+                                    }
+                                }
+
+                                // Don't support re-exporting 'require()' calls, so just add a single indirect user.
+                                addIndirectUser(direct.getSourceFile());
+                            }
+                            break;
+
+                        case SyntaxKind.ImportEqualsDeclaration:
+                            handleNamespaceImport(direct, direct.name, hasModifier(direct, ModifierFlags.Export));
+                            break;
+
+                        case SyntaxKind.ImportDeclaration:
+                            const namedBindings = direct.importClause && direct.importClause.namedBindings;
+                            if (namedBindings && namedBindings.kind === SyntaxKind.NamespaceImport) {
+                                handleNamespaceImport(direct, namedBindings.name);
+                            }
+                            else {
+                                directImports.push(direct);
+                            }
+                            break;
+
+                        case SyntaxKind.ExportDeclaration:
+                            if (!direct.exportClause) {
+                                // This is `export * from "foo"`, so imports of this module may import the export too.
+                                handleDirectImports(getContainingModuleSymbol(direct, checker));
+                            }
+                            else {
+                                // This is `export { foo } from "foo"` and creates an alias symbol, so recursive search will get handle re-exports.
+                                directImports.push(direct);
+                            }
+                            break;
+                    }
+                }
+            }
+        }
+
+        function handleNamespaceImport(importDeclaration: ImportEqualsDeclaration | ImportDeclaration, name: Identifier, isReExport?: boolean): void {
+            if (exportKind === ExportKind.ExportEquals) {
+                // This is a direct import, not import-as-namespace.
+                directImports.push(importDeclaration);
+            }
+            else if (!isAvailableThroughGlobal) {
+                const sourceFileLike = getSourceFileLikeForImportDeclaration(importDeclaration);
+                Debug.assert(sourceFileLike.kind === SyntaxKind.SourceFile || sourceFileLike.kind === SyntaxKind.ModuleDeclaration);
+                if (isReExport || findNamespaceReExports(sourceFileLike, name, checker)) {
+                    addIndirectUsers(sourceFileLike);
+                }
+                else {
+                    addIndirectUser(sourceFileLike);
+                }
+            }
+        }
+
+        function addIndirectUser(sourceFileLike: SourceFileLike): boolean {
+            Debug.assert(!isAvailableThroughGlobal);
+            const isNew = markSeenIndirectUser(sourceFileLike);
+            if (isNew) {
+                indirectUserDeclarations.push(sourceFileLike);
+            }
+            return isNew;
+        }
+
+        /** Adds a module and all of its transitive dependencies as possible indirect users. */
+        function addIndirectUsers(sourceFileLike: SourceFileLike): void {
+            if (!addIndirectUser(sourceFileLike)) {
+                return;
+            }
+
+            const moduleSymbol = checker.getMergedSymbol(sourceFileLike.symbol);
+            Debug.assert(!!(moduleSymbol.flags & SymbolFlags.Module));
+            const directImports = getDirectImports(moduleSymbol);
+            if (directImports) {
+                for (const directImport of directImports) {
+                    addIndirectUsers(getSourceFileLikeForImportDeclaration(directImport));
+                }
+            }
+        }
+
+        function getDirectImports(moduleSymbol: Symbol): ImporterOrCallExpression[] | undefined {
+            return allDirectImports.get(getSymbolId(moduleSymbol).toString());
+        }
+    }
+
+    /**
+     * Given the set of direct imports of a module, we need to find which ones import the particular exported symbol.
+     * The returned `importSearches` will result in the entire source file being searched.
+     * But re-exports will be placed in 'singleReferences' since they cannot be locally referenced.
+     */
+    function getSearchesFromDirectImports(directImports: Importer[], exportSymbol: Symbol, exportKind: ExportKind, checker: TypeChecker, isForRename: boolean): Pick<ImportsResult, "importSearches" | "singleReferences"> {
+        const exportName = exportSymbol.name;
+        const importSearches: Array<[Identifier, Symbol]> = [];
+        const singleReferences: Identifier[] = [];
+        function addSearch(location: Identifier, symbol: Symbol): void {
+            importSearches.push([location, symbol]);
+        }
+
+        if (directImports) {
+            for (const decl of directImports) {
+                handleImport(decl);
+            }
+        }
+
+        return { importSearches, singleReferences };
+
+        function handleImport(decl: Importer): void {
+            if (decl.kind === SyntaxKind.ImportEqualsDeclaration) {
+                if (isExternalModuleImportEquals(decl)) {
+                    handleNamespaceImportLike(decl.name);
+                }
+                return;
+            }
+
+            if (decl.kind === ts.SyntaxKind.Identifier) {
+                handleNamespaceImportLike(decl);
+                return;
+            }
+
+            // Ignore if there's a grammar error
+            if (decl.moduleSpecifier.kind !== SyntaxKind.StringLiteral) {
+                return;
+            }
+
+            if (decl.kind === SyntaxKind.ExportDeclaration) {
+                searchForNamedImport(decl.exportClause);
+                return;
+            }
+
+            if (!decl.importClause) {
+                return;
+            }
+
+            const { importClause } = decl;
+
+            const { namedBindings } = importClause;
+            if (namedBindings && namedBindings.kind === SyntaxKind.NamespaceImport) {
+                handleNamespaceImportLike(namedBindings.name);
+                return;
+            }
+
+            if (exportKind === ExportKind.Named) {
+                searchForNamedImport(namedBindings as NamedImports | undefined);
+            }
+            else {
+                // `export =` might be imported by a default import if `--allowSyntheticDefaultImports` is on, so this handles both ExportKind.Default and ExportKind.ExportEquals
+                const { name } = importClause;
+                // If a default import has the same name as the default export, allow to rename it.
+                // Given `import f` and `export default function f`, we will rename both, but for `import g` we will rename just that.
+                if (name && (!isForRename || name.text === symbolName(exportSymbol))) {
+                    const defaultImportAlias = checker.getSymbolAtLocation(name);
+                    addSearch(name, defaultImportAlias);
+                }
+
+                // 'default' might be accessed as a named import `{ default as foo }`.
+                if (!isForRename && exportKind === ExportKind.Default) {
+                    Debug.assert(exportName === "default");
+                    searchForNamedImport(namedBindings as NamedImports | undefined);
+                }
+            }
+        }
+
+        /**
+         * `import x = require("./x") or `import * as x from "./x"`.
+         * An `export =` may be imported by this syntax, so it may be a direct import.
+         * If it's not a direct import, it will be in `indirectUsers`, so we don't have to do anything here.
+         */
+        function handleNamespaceImportLike(importName: Identifier): void {
+            // Don't rename an import that already has a different name than the export.
+            if (exportKind === ExportKind.ExportEquals && (!isForRename || importName.text === exportName)) {
+                addSearch(importName, checker.getSymbolAtLocation(importName));
+            }
+        }
+
+        function searchForNamedImport(namedBindings: NamedImportsOrExports | undefined): void {
+            if (namedBindings) {
+                for (const element of namedBindings.elements) {
+                    const { name, propertyName } = element;
+                    if ((propertyName || name).text !== exportName) {
+                        continue;
+                    }
+
+                    if (propertyName) {
+                        // This is `import { foo as bar } from "./a"` or `export { foo as bar } from "./a"`. `foo` isn't a local in the file, so just add it as a single reference.
+                        singleReferences.push(propertyName);
+                        if (!isForRename) { // If renaming `foo`, don't touch `bar`, just `foo`.
+                            // Search locally for `bar`.
+                            addSearch(name, checker.getSymbolAtLocation(name));
+                        }
+                    }
+                    else {
+                        const localSymbol = element.kind === SyntaxKind.ExportSpecifier && element.propertyName
+                            ? checker.getExportSpecifierLocalTargetSymbol(element) // For re-exporting under a different name, we want to get the re-exported symbol.
+                            : checker.getSymbolAtLocation(name);
+                        addSearch(name, localSymbol);
+                    }
+                }
+            }
+        }
+    }
+
+    /** Returns 'true' is the namespace 'name' is re-exported from this module, and 'false' if it is only used locally. */
+    function findNamespaceReExports(sourceFileLike: SourceFileLike, name: Identifier, checker: TypeChecker): boolean {
+        const namespaceImportSymbol = checker.getSymbolAtLocation(name);
+
+        return forEachPossibleImportOrExportStatement(sourceFileLike, statement => {
+            if (statement.kind !== SyntaxKind.ExportDeclaration) return;
+
+            const { exportClause, moduleSpecifier } = statement as ExportDeclaration;
+            if (moduleSpecifier || !exportClause) return;
+
+            for (const element of exportClause.elements) {
+                if (checker.getExportSpecifierLocalTargetSymbol(element) === namespaceImportSymbol) {
+                    return true;
+                }
+            }
+        });
+    }
+
+    export type ModuleReference =
+        /** "import" also includes require() calls. */
+        | { kind: "import", literal: StringLiteral }
+        /** <reference path> or <reference types> */
+        | { kind: "reference", referencingFile: SourceFile, ref: FileReference };
+    export function findModuleReferences(program: Program, sourceFiles: SourceFile[], searchModuleSymbol: Symbol): ModuleReference[] {
+        const refs: ModuleReference[] = [];
+        const checker = program.getTypeChecker();
+        for (const referencingFile of sourceFiles) {
+            const searchSourceFile = searchModuleSymbol.valueDeclaration;
+            if (searchSourceFile.kind === ts.SyntaxKind.SourceFile) {
+                for (const ref of referencingFile.referencedFiles) {
+                    if (program.getSourceFileFromReference(referencingFile, ref) === searchSourceFile) {
+                        refs.push({ kind: "reference", referencingFile, ref });
+                    }
+                }
+                for (const ref of referencingFile.typeReferenceDirectives) {
+                    const referenced = program.getResolvedTypeReferenceDirectives().get(ref.fileName);
+                    if (referenced !== undefined && referenced.resolvedFileName === (searchSourceFile as ts.SourceFile).fileName) {
+                        refs.push({ kind: "reference", referencingFile, ref });
+                    }
+                }
+            }
+
+            forEachImport(referencingFile, (_importDecl, moduleSpecifier) => {
+                const moduleSymbol = checker.getSymbolAtLocation(moduleSpecifier);
+                if (moduleSymbol === searchModuleSymbol) {
+                    refs.push({ kind: "import", literal: moduleSpecifier });
+                }
+            });
+        }
+        return refs;
+    }
+
+    /** Returns a map from a module symbol Id to all import statements that directly reference the module. */
+    function getDirectImportsMap(sourceFiles: SourceFile[], checker: TypeChecker, cancellationToken: CancellationToken): Map<ImporterOrCallExpression[]> {
+        const map = createMap<ImporterOrCallExpression[]>();
+
+        for (const sourceFile of sourceFiles) {
+            cancellationToken.throwIfCancellationRequested();
+            forEachImport(sourceFile, (importDecl, moduleSpecifier) => {
+                const moduleSymbol = checker.getSymbolAtLocation(moduleSpecifier);
+                if (moduleSymbol) {
+                    const id = getSymbolId(moduleSymbol).toString();
+                    let imports = map.get(id);
+                    if (!imports) {
+                        map.set(id, imports = []);
+                    }
+                    imports.push(importDecl);
+                }
+            });
+        }
+
+        return map;
+    }
+
+    /** Iterates over all statements at the top level or in module declarations. Returns the first truthy result. */
+    function forEachPossibleImportOrExportStatement<T>(sourceFileLike: SourceFileLike, action: (statement: Statement) => T): T {
+        return forEach(sourceFileLike.kind === SyntaxKind.SourceFile ? sourceFileLike.statements : sourceFileLike.body.statements, statement =>
+            action(statement) || (isAmbientModuleDeclaration(statement) && forEach(statement.body && statement.body.statements, action)));
+    }
+
+    /** Calls `action` for each import, re-export, or require() in a file. */
+    function forEachImport(sourceFile: SourceFile, action: (importStatement: ImporterOrCallExpression, imported: StringLiteral) => void): void {
+        if (sourceFile.externalModuleIndicator || sourceFile.imports !== undefined) {
+            for (const moduleSpecifier of sourceFile.imports) {
+                action(importerFromModuleSpecifier(moduleSpecifier), moduleSpecifier);
+            }
+        }
+        else {
+            forEachPossibleImportOrExportStatement(sourceFile, statement => {
+                switch (statement.kind) {
+                    case SyntaxKind.ExportDeclaration:
+                    case SyntaxKind.ImportDeclaration: {
+                        const decl = statement as ImportDeclaration | ExportDeclaration;
+                        if (decl.moduleSpecifier && decl.moduleSpecifier.kind === SyntaxKind.StringLiteral) {
+                            action(decl, decl.moduleSpecifier as StringLiteral);
+                        }
+                        break;
+                    }
+
+                    case SyntaxKind.ImportEqualsDeclaration: {
+                        const decl = statement as ImportEqualsDeclaration;
+                        const { moduleReference } = decl;
+                        if (moduleReference.kind === SyntaxKind.ExternalModuleReference &&
+                            moduleReference.expression.kind === SyntaxKind.StringLiteral) {
+                            action(decl, moduleReference.expression as StringLiteral);
+                        }
+                        break;
+                    }
+                }
+            });
+        }
+    }
+
+    function importerFromModuleSpecifier(moduleSpecifier: StringLiteral): ImporterOrCallExpression {
+        const decl = moduleSpecifier.parent;
+        switch (decl.kind) {
+            case SyntaxKind.CallExpression:
+            case SyntaxKind.ImportDeclaration:
+            case SyntaxKind.ExportDeclaration:
+                return decl as ImportDeclaration | ExportDeclaration | CallExpression;
+            case SyntaxKind.ExternalModuleReference:
+                return (decl as ExternalModuleReference).parent;
+            default:
+                Debug.fail(`Unexpected module specifier parent: ${decl.kind}`);
+        }
+    }
+
+    export interface ImportedSymbol {
+        kind: ImportExport.Import;
+        symbol: Symbol;
+        isNamedImport: boolean;
+    }
+    export interface ExportedSymbol {
+        kind: ImportExport.Export;
+        symbol: Symbol;
+        exportInfo: ExportInfo;
+    }
+
+    /**
+     * Given a local reference, we might notice that it's an import/export and recursively search for references of that.
+     * If at an import, look locally for the symbol it imports.
+     * If an an export, look for all imports of it.
+     * This doesn't handle export specifiers; that is done in `getReferencesAtExportSpecifier`.
+     * @param comingFromExport If we are doing a search for all exports, don't bother looking backwards for the imported symbol, since that's the reason we're here.
+     */
+    export function getImportOrExportSymbol(node: Node, symbol: Symbol, checker: TypeChecker, comingFromExport: boolean): ImportedSymbol | ExportedSymbol | undefined {
+        return comingFromExport ? getExport() : getExport() || getImport();
+
+        function getExport(): ExportedSymbol | ImportedSymbol | undefined {
+            const parent = node.parent!;
+            if (symbol.flags & SymbolFlags.Export) {
+                if (parent.kind === SyntaxKind.PropertyAccessExpression) {
+                    // When accessing an export of a JS module, there's no alias. The symbol will still be flagged as an export even though we're at the use.
+                    // So check that we are at the declaration.
+                    return symbol.declarations.some(d => d === parent) && isBinaryExpression(parent.parent)
+                        ? getSpecialPropertyExport(parent.parent, /*useLhsSymbol*/ false)
+                        : undefined;
+                }
+                else {
+                    const { exportSymbol } = symbol;
+                    Debug.assert(!!exportSymbol);
+                    return exportInfo(exportSymbol, getExportKindForDeclaration(parent));
+                }
+            }
+            else {
+                const exportNode = getExportNode(parent);
+                if (exportNode && hasModifier(exportNode, ModifierFlags.Export)) {
+                    if (isImportEqualsDeclaration(exportNode) && exportNode.moduleReference === node) {
+                        // We're at `Y` in `export import X = Y`. This is not the exported symbol, the left-hand-side is. So treat this as an import statement.
+                        if (comingFromExport) {
+                            return undefined;
+                        }
+
+                        const lhsSymbol = checker.getSymbolAtLocation(exportNode.name);
+                        return { kind: ImportExport.Import, symbol: lhsSymbol, isNamedImport: false };
+                    }
+                    else {
+                        return exportInfo(symbol, getExportKindForDeclaration(exportNode));
+                    }
+                }
+                // If we are in `export = a;`, `parent` is the export assignment.
+                else if (isExportAssignment(parent)) {
+                    return getExportAssignmentExport(parent);
+                }
+                // If we are in `export = class A {};` at `A`, `parent.parent` is the export assignment.
+                else if (isExportAssignment(parent.parent)) {
+                    return getExportAssignmentExport(parent.parent);
+                }
+                // Similar for `module.exports =` and `exports.A =`.
+                else if (isBinaryExpression(parent)) {
+                    return getSpecialPropertyExport(parent, /*useLhsSymbol*/ true);
+                }
+                else if (isBinaryExpression(parent.parent)) {
+                    return getSpecialPropertyExport(parent.parent, /*useLhsSymbol*/ true);
+                }
+            }
+
+            function getExportAssignmentExport(ex: ExportAssignment): ExportedSymbol {
+                // Get the symbol for the `export =` node; its parent is the module it's the export of.
+                const exportingModuleSymbol = ex.symbol.parent;
+                Debug.assert(!!exportingModuleSymbol);
+                return { kind: ImportExport.Export, symbol, exportInfo: { exportingModuleSymbol, exportKind: ExportKind.ExportEquals } };
+            }
+
+            function getSpecialPropertyExport(node: ts.BinaryExpression, useLhsSymbol: boolean): ExportedSymbol | undefined {
+                let kind: ExportKind;
+                switch (getSpecialPropertyAssignmentKind(node)) {
+                    case SpecialPropertyAssignmentKind.ExportsProperty:
+                        kind = ExportKind.Named;
+                        break;
+                    case SpecialPropertyAssignmentKind.ModuleExports:
+                        kind = ExportKind.ExportEquals;
+                        break;
+                    default:
+                        return undefined;
+                }
+
+                const sym = useLhsSymbol ? checker.getSymbolAtLocation((node.left as ts.PropertyAccessExpression).name) : symbol;
+                return sym && exportInfo(sym, kind);
+            }
+        }
+
+        function getImport(): ImportedSymbol | undefined {
+            const isImport = isNodeImport(node);
+            if (!isImport) return undefined;
+
+            // A symbol being imported is always an alias. So get what that aliases to find the local symbol.
+            let importedSymbol = checker.getImmediateAliasedSymbol(symbol);
+            if (!importedSymbol) return undefined;
+
+            // Search on the local symbol in the exporting module, not the exported symbol.
+            importedSymbol = skipExportSpecifierSymbol(importedSymbol, checker);
+            // Similarly, skip past the symbol for 'export ='
+            if (importedSymbol.name === "export=") {
+                importedSymbol = getExportEqualsLocalSymbol(importedSymbol, checker);
+            }
+
+            if (symbolName(importedSymbol) === symbol.name) { // If this is a rename import, do not continue searching.
+                return { kind: ImportExport.Import, symbol: importedSymbol, ...isImport };
+            }
+        }
+
+        function exportInfo(symbol: Symbol, kind: ExportKind): ExportedSymbol {
+            const exportInfo = getExportInfo(symbol, kind, checker);
+            return exportInfo && { kind: ImportExport.Export, symbol, exportInfo };
+        }
+
+        // Not meant for use with export specifiers or export assignment.
+        function getExportKindForDeclaration(node: Node): ExportKind | undefined {
+            return hasModifier(node, ModifierFlags.Default) ? ExportKind.Default : ExportKind.Named;
+        }
+    }
+
+    function getExportEqualsLocalSymbol(importedSymbol: Symbol, checker: TypeChecker): Symbol {
+        if (importedSymbol.flags & SymbolFlags.Alias) {
+            return checker.getImmediateAliasedSymbol(importedSymbol);
+        }
+
+        const decl = importedSymbol.valueDeclaration;
+        if (isExportAssignment(decl)) { // `export = class {}`
+            return decl.expression.symbol;
+        }
+        else if (isBinaryExpression(decl)) { // `module.exports = class {}`
+            return decl.right.symbol;
+        }
+        Debug.fail();
+    }
+
+    // If a reference is a class expression, the exported node would be its parent.
+    // If a reference is a variable declaration, the exported node would be the variable statement.
+    function getExportNode(parent: Node): Node | undefined {
+        if (parent.kind === SyntaxKind.VariableDeclaration) {
+            const p = parent as ts.VariableDeclaration;
+            return p.parent.kind === ts.SyntaxKind.CatchClause ? undefined : p.parent.parent.kind === SyntaxKind.VariableStatement ? p.parent.parent : undefined;
+        }
+        else {
+            return parent;
+        }
+    }
+
+    function isNodeImport(node: Node): { isNamedImport: boolean } | undefined {
+        const { parent } = node;
+        switch (parent.kind) {
+            case SyntaxKind.ImportEqualsDeclaration:
+                return (parent as ImportEqualsDeclaration).name === node && isExternalModuleImportEquals(parent as ImportEqualsDeclaration)
+                    ? { isNamedImport: false }
+                    : undefined;
+            case SyntaxKind.ImportSpecifier:
+                // For a rename import `{ foo as bar }`, don't search for the imported symbol. Just find local uses of `bar`.
+                return (parent as ImportSpecifier).propertyName ? undefined : { isNamedImport: true };
+            case SyntaxKind.ImportClause:
+            case SyntaxKind.NamespaceImport:
+                Debug.assert((parent as ImportClause | NamespaceImport).name === node);
+                return { isNamedImport: false };
+            default:
+                return undefined;
+        }
+    }
+
+    export function getExportInfo(exportSymbol: Symbol, exportKind: ExportKind, checker: TypeChecker): ExportInfo | undefined {
+        const exportingModuleSymbol = checker.getMergedSymbol(exportSymbol.parent); // Need to get merged symbol in case there's an augmentation.
+        // `export` may appear in a namespace. In that case, just rely on global search.
+        return isExternalModuleSymbol(exportingModuleSymbol) ? { exportingModuleSymbol, exportKind } : undefined;
+    }
+
+    function symbolName(symbol: Symbol): string | undefined {
+        if (symbol.name !== "default") {
+            return symbol.name;
+        }
+
+        return forEach(symbol.declarations, decl => {
+            if (isExportAssignment(decl)) {
+                return isIdentifier(decl.expression) ? decl.expression.text : undefined;
+            }
+            const name = getNameOfDeclaration(decl);
+            return name && name.kind === SyntaxKind.Identifier && name.text;
+        });
+    }
+
+    /** If at an export specifier, go to the symbol it refers to. */
+    function skipExportSpecifierSymbol(symbol: Symbol, checker: TypeChecker): Symbol {
+        // For `export { foo } from './bar", there's nothing to skip, because it does  not create a new alias. But `export { foo } does.
+        if (symbol.declarations) {
+            for (const declaration of symbol.declarations) {
+                if (isExportSpecifier(declaration) && !(declaration as ExportSpecifier).propertyName && !(declaration as ExportSpecifier).parent.parent.moduleSpecifier) {
+                    return checker.getExportSpecifierLocalTargetSymbol(declaration);
+                }
+            }
+        }
+        return symbol;
+    }
+
+    function getContainingModuleSymbol(importer: Importer, checker: TypeChecker): Symbol {
+        return checker.getMergedSymbol(getSourceFileLikeForImportDeclaration(importer).symbol);
+    }
+
+    function getSourceFileLikeForImportDeclaration(node: ImporterOrCallExpression): SourceFileLike {
+        if (node.kind === SyntaxKind.CallExpression) {
+            return node.getSourceFile();
+        }
+
+        const { parent } = node;
+
+        if (parent.kind === SyntaxKind.SourceFile) {
+            return parent as SourceFile;
+        }
+        Debug.assert(parent.kind === SyntaxKind.ModuleBlock && isAmbientModuleDeclaration(parent.parent));
+        return parent.parent as AmbientModuleDeclaration;
+    }
+
+    function isAmbientModuleDeclaration(node: Node): node is AmbientModuleDeclaration {
+        return node.kind === SyntaxKind.ModuleDeclaration && (node as ModuleDeclaration).name.kind === SyntaxKind.StringLiteral;
+    }
+
+    function isExternalModuleImportEquals({ moduleReference }: ImportEqualsDeclaration): boolean {
+        return moduleReference.kind === SyntaxKind.ExternalModuleReference && moduleReference.expression.kind === SyntaxKind.StringLiteral;
+    }
+}
diff --git a/src/services/jsDoc.ts b/src/services/jsDoc.ts
index feca406..5d03ad0 100644
--- a/src/services/jsDoc.ts
+++ b/src/services/jsDoc.ts
@@ -23,10 +23,12 @@ namespace ts.JsDoc {
         "lends",
         "link",
         "memberOf",
+        "method",
         "name",
         "namespace",
         "param",
         "private",
+        "prop",
         "property",
         "public",
         "requires",
@@ -37,13 +39,12 @@ namespace ts.JsDoc {
         "throws",
         "type",
         "typedef",
-        "property",
-        "prop",
         "version"
     ];
-    let jsDocCompletionEntries: CompletionEntry[];
+    let jsDocTagNameCompletionEntries: CompletionEntry[];
+    let jsDocTagCompletionEntries: CompletionEntry[];
 
-    export function getJsDocCommentsFromDeclarations(declarations: Declaration[], name: string, canUseParsedParamTagComments: boolean) {
+    export function getJsDocCommentsFromDeclarations(declarations?: Declaration[]) {
         // Only collect doc comments from duplicate declarations once:
         // In case of a union property there might be same declaration multiple times
         // which only varies in type parameter
@@ -52,7 +53,7 @@ namespace ts.JsDoc {
         // from Array<T> - Array<string> and Array<number>
         const documentationComment = <SymbolDisplayPart[]>[];
         forEachUnique(declarations, declaration => {
-            const comments = getJSDocComments(declaration, /*checkParentVariableStatement*/ true);
+            const comments = getCommentsFromJSDoc(declaration);
             if (!comments) {
                 return;
             }
@@ -68,6 +69,28 @@ namespace ts.JsDoc {
         return documentationComment;
     }
 
+    export function getJsDocTagsFromDeclarations(declarations?: Declaration[]) {
+        // Only collect doc comments from duplicate declarations once.
+        const tags: JSDocTagInfo[] = [];
+        forEachUnique(declarations, declaration => {
+            const jsDocs = getJSDocs(declaration);
+            if (!jsDocs) {
+                return;
+            }
+            for (const doc of jsDocs) {
+                const tagsForDoc = (doc as JSDoc).tags;
+                if (tagsForDoc) {
+                    tags.push(...tagsForDoc.filter(tag => tag.kind === SyntaxKind.JSDocTag).map(jsDocTag => {
+                        return {
+                            name: jsDocTag.tagName.text,
+                            text: jsDocTag.comment
+                        }; }));
+                }
+            }
+        });
+        return tags;
+    }
+
     /**
      * Iterates through 'array' by index and performs the callback on each element of array until the callback
      * returns a truthy value, then returns that value.
@@ -75,7 +98,7 @@ namespace ts.JsDoc {
      */
     function forEachUnique<T, U>(array: T[], callback: (element: T, index: number) => U): U {
         if (array) {
-            for (let i = 0, len = array.length; i < len; i++) {
+            for (let i = 0; i < array.length; i++) {
                 if (indexOf(array, array[i]) === i) {
                     const result = callback(array[i], i);
                     if (result) {
@@ -87,8 +110,8 @@ namespace ts.JsDoc {
         return undefined;
     }
 
-    export function getAllJsDocCompletionEntries(): CompletionEntry[] {
-        return jsDocCompletionEntries || (jsDocCompletionEntries = ts.map(jsDocTagNames, tagName => {
+    export function getJSDocTagNameCompletions(): CompletionEntry[] {
+        return jsDocTagNameCompletionEntries || (jsDocTagNameCompletionEntries = ts.map(jsDocTagNames, tagName => {
             return {
                 name: tagName,
                 kind: ScriptElementKind.keyword,
@@ -98,6 +121,36 @@ namespace ts.JsDoc {
         }));
     }
 
+    export function getJSDocTagCompletions(): CompletionEntry[] {
+        return jsDocTagCompletionEntries || (jsDocTagCompletionEntries = ts.map(jsDocTagNames, tagName => {
+            return {
+                name: `@${tagName}`,
+                kind: ScriptElementKind.keyword,
+                kindModifiers: "",
+                sortText: "0"
+            };
+        }));
+    }
+
+    export function getJSDocParameterNameCompletions(tag: JSDocParameterTag): CompletionEntry[] {
+        const nameThusFar = tag.name.text;
+        const jsdoc = tag.parent;
+        const fn = jsdoc.parent;
+        if (!ts.isFunctionLike(fn)) return [];
+
+        return mapDefined(fn.parameters, param => {
+            if (!isIdentifier(param.name)) return undefined;
+
+            const name = param.name.text;
+            if (jsdoc.tags.some(t => t !== tag && isJSDocParameterTag(t) && t.name.text === name)
+                || nameThusFar !== undefined && !startsWith(name, nameThusFar)) {
+                return undefined;
+            }
+
+            return { name, kind: ScriptElementKind.parameterElement, kindModifiers: "", sortText: "0" };
+        });
+    }
+
     /**
      * Checks if position points to a valid position to add JSDoc comments, and if so,
      * returns the appropriate template. Otherwise returns an empty string.
@@ -124,7 +177,7 @@ namespace ts.JsDoc {
             return undefined;
         }
 
-        const tokenAtPos = getTokenAtPosition(sourceFile, position);
+        const tokenAtPos = getTokenAtPosition(sourceFile, position, /*includeJsDocComment*/ false);
         const tokenStart = tokenAtPos.getStart();
         if (!tokenAtPos || tokenStart < position) {
             return undefined;
@@ -165,16 +218,22 @@ namespace ts.JsDoc {
         const posLineAndChar = sourceFile.getLineAndCharacterOfPosition(position);
         const lineStart = sourceFile.getLineStarts()[posLineAndChar.line];
 
-        const indentationStr = sourceFile.text.substr(lineStart, posLineAndChar.character);
+        // replace non-whitespace characters in prefix with spaces.
+        const indentationStr = sourceFile.text.substr(lineStart, posLineAndChar.character).replace(/\S/i, () => " ");
+        const isJavaScriptFile = hasJavaScriptFileExtension(sourceFile.fileName);
 
         let docParams = "";
-        for (let i = 0, numParams = parameters.length; i < numParams; i++) {
+        for (let i = 0; i < parameters.length; i++) {
             const currentName = parameters[i].name;
             const paramName = currentName.kind === SyntaxKind.Identifier ?
                 (<Identifier>currentName).text :
                 "param" + i;
-
-            docParams += `${indentationStr} * @param ${paramName}${newLine}`;
+            if (isJavaScriptFile) {
+                docParams += `${indentationStr} * @param {any} ${paramName}${newLine}`;
+            }
+            else {
+                docParams += `${indentationStr} * @param ${paramName}${newLine}`;
+            }
         }
 
         // A doc comment consists of the following
diff --git a/src/services/jsTyping.ts b/src/services/jsTyping.ts
index d50e26c..d84ae01 100644
--- a/src/services/jsTyping.ts
+++ b/src/services/jsTyping.ts
@@ -1,4 +1,4 @@
-// Copyright (c) Microsoft. All rights reserved. Licensed under the Apache License, Version 2.0.
+// Copyright (c) Microsoft. All rights reserved. Licensed under the Apache License, Version 2.0.
 // See LICENSE.txt in the project root for complete license information.
 
 /// <reference path='../compiler/types.ts' />
@@ -13,17 +13,17 @@ namespace ts.JsTyping {
         fileExists: (fileName: string) => boolean;
         readFile: (path: string, encoding?: string) => string;
         readDirectory: (rootDir: string, extensions: string[], excludes: string[], includes: string[], depth?: number) => string[];
-    };
+    }
 
     interface PackageJson {
         _requiredBy?: string[];
-        dependencies?: Map<string>;
-        devDependencies?: Map<string>;
+        dependencies?: MapLike<string>;
+        devDependencies?: MapLike<string>;
         name?: string;
-        optionalDependencies?: Map<string>;
-        peerDependencies?: Map<string>;
+        optionalDependencies?: MapLike<string>;
+        peerDependencies?: MapLike<string>;
         typings?: string;
-    };
+    }
 
     // A map of loose file names to library names
     // that we are confident require typings
@@ -31,13 +31,24 @@ namespace ts.JsTyping {
 
     const EmptySafeList: Map<string> = createMap<string>();
 
+    /* @internal */
+    export const nodeCoreModuleList: ReadonlyArray<string> = [
+        "buffer", "querystring", "events", "http", "cluster",
+        "zlib", "os", "https", "punycode", "repl", "readline",
+        "vm", "child_process", "url", "dns", "net",
+        "dgram", "fs", "path", "string_decoder", "tls",
+        "crypto", "stream", "util", "assert", "tty", "domain",
+        "constants", "process", "v8", "timers", "console"];
+
+    const nodeCoreModules = arrayToMap(<string[]>nodeCoreModuleList, x => x);
+
     /**
      * @param host is the object providing I/O related operations.
      * @param fileNames are the file names that belong to the same project
      * @param projectRootPath is the path to the project root directory
      * @param safeListPath is the path used to retrieve the safe list
      * @param packageNameToTypingLocation is the map of package names to their cached typing locations
-     * @param typingOptions are used to customize the typing inference process
+     * @param typeAcquisition is used to customize the typing acquisition process
      * @param compilerOptions are used as a source for typing inference
      */
     export function discoverTypings(
@@ -46,14 +57,14 @@ namespace ts.JsTyping {
         projectRootPath: Path,
         safeListPath: Path,
         packageNameToTypingLocation: Map<string>,
-        typingOptions: TypingOptions,
-        compilerOptions: CompilerOptions):
+        typeAcquisition: TypeAcquisition,
+        unresolvedImports: ReadonlyArray<string>):
         { cachedTypingPaths: string[], newTypingNames: string[], filesToWatch: string[] } {
 
         // A typing name to typing file path mapping
         const inferredTypings = createMap<string>();
 
-        if (!typingOptions || !typingOptions.enableAutoDiscovery) {
+        if (!typeAcquisition || !typeAcquisition.enable) {
             return { cachedTypingPaths: [], newTypingNames: [], filesToWatch: [] };
         }
 
@@ -65,7 +76,7 @@ namespace ts.JsTyping {
 
         if (!safeList) {
             const result = readConfigFile(safeListPath, (path: string) => host.readFile(path));
-            safeList = result.config ? createMap<string>(result.config) : EmptySafeList;
+            safeList = createMapFromTemplate<string>(result.config);
         }
 
         const filesToWatch: string[] = [];
@@ -73,11 +84,11 @@ namespace ts.JsTyping {
         let searchDirs: string[] = [];
         let exclude: string[] = [];
 
-        mergeTypings(typingOptions.include);
-        exclude = typingOptions.exclude || [];
+        mergeTypings(typeAcquisition.include);
+        exclude = typeAcquisition.exclude || [];
 
         const possibleSearchDirs = map(fileNames, getDirectoryPath);
-        if (projectRootPath !== undefined) {
+        if (projectRootPath) {
             possibleSearchDirs.push(projectRootPath);
         }
         searchDirs = deduplicate(possibleSearchDirs);
@@ -88,46 +99,58 @@ namespace ts.JsTyping {
             const bowerJsonPath = combinePaths(searchDir, "bower.json");
             getTypingNamesFromJson(bowerJsonPath, filesToWatch);
 
+            const bowerComponentsPath = combinePaths(searchDir, "bower_components");
+            getTypingNamesFromPackagesFolder(bowerComponentsPath);
+
             const nodeModulesPath = combinePaths(searchDir, "node_modules");
-            getTypingNamesFromNodeModuleFolder(nodeModulesPath);
+            getTypingNamesFromPackagesFolder(nodeModulesPath);
         }
         getTypingNamesFromSourceFileNames(fileNames);
 
-        // Add the cached typing locations for inferred typings that are already installed
-        for (const name in packageNameToTypingLocation) {
-            if (name in inferredTypings && !inferredTypings[name]) {
-                inferredTypings[name] = packageNameToTypingLocation[name];
+        // add typings for unresolved imports
+        if (unresolvedImports) {
+            for (const moduleId of unresolvedImports) {
+                const typingName = nodeCoreModules.has(moduleId) ? "node" : moduleId;
+                if (!inferredTypings.has(typingName)) {
+                    inferredTypings.set(typingName, undefined);
+                }
             }
         }
+        // Add the cached typing locations for inferred typings that are already installed
+        packageNameToTypingLocation.forEach((typingLocation, name) => {
+            if (inferredTypings.has(name) && inferredTypings.get(name) === undefined) {
+                inferredTypings.set(name, typingLocation);
+            }
+        });
 
         // Remove typings that the user has added to the exclude list
         for (const excludeTypingName of exclude) {
-            delete inferredTypings[excludeTypingName];
+            inferredTypings.delete(excludeTypingName);
         }
 
         const newTypingNames: string[] = [];
         const cachedTypingPaths: string[] = [];
-        for (const typing in inferredTypings) {
-            if (inferredTypings[typing] !== undefined) {
-                cachedTypingPaths.push(inferredTypings[typing]);
+        inferredTypings.forEach((inferred, typing) => {
+            if (inferred !== undefined) {
+                cachedTypingPaths.push(inferred);
             }
             else {
                 newTypingNames.push(typing);
             }
-        }
+        });
         return { cachedTypingPaths, newTypingNames, filesToWatch };
 
         /**
          * Merge a given list of typingNames to the inferredTypings map
          */
-        function mergeTypings(typingNames: string[]) {
+        function mergeTypings(typingNames: ReadonlyArray<string>) {
             if (!typingNames) {
                 return;
             }
 
             for (const typing of typingNames) {
-                if (!(typing in inferredTypings)) {
-                    inferredTypings[typing] = undefined;
+                if (!inferredTypings.has(typing)) {
+                    inferredTypings.set(typing, undefined);
                 }
             }
         }
@@ -136,22 +159,22 @@ namespace ts.JsTyping {
          * Get the typing info from common package manager json files like package.json or bower.json
          */
         function getTypingNamesFromJson(jsonPath: string, filesToWatch: string[]) {
-            const result = readConfigFile(jsonPath, (path: string) => host.readFile(path));
-            if (result.config) {
-                const jsonConfig: PackageJson = result.config;
+            if (host.fileExists(jsonPath)) {
                 filesToWatch.push(jsonPath);
-                if (jsonConfig.dependencies) {
-                    mergeTypings(getOwnKeys(jsonConfig.dependencies));
-                }
-                if (jsonConfig.devDependencies) {
-                    mergeTypings(getOwnKeys(jsonConfig.devDependencies));
-                }
-                if (jsonConfig.optionalDependencies) {
-                    mergeTypings(getOwnKeys(jsonConfig.optionalDependencies));
-                }
-                if (jsonConfig.peerDependencies) {
-                    mergeTypings(getOwnKeys(jsonConfig.peerDependencies));
-                }
+            }
+            const result = readConfigFile(jsonPath, (path: string) => host.readFile(path));
+            const jsonConfig: PackageJson = result.config;
+            if (jsonConfig.dependencies) {
+                mergeTypings(getOwnKeys(jsonConfig.dependencies));
+            }
+            if (jsonConfig.devDependencies) {
+                mergeTypings(getOwnKeys(jsonConfig.devDependencies));
+            }
+            if (jsonConfig.optionalDependencies) {
+                mergeTypings(getOwnKeys(jsonConfig.optionalDependencies));
+            }
+            if (jsonConfig.peerDependencies) {
+                mergeTypings(getOwnKeys(jsonConfig.peerDependencies));
             }
         }
 
@@ -167,7 +190,7 @@ namespace ts.JsTyping {
             const cleanedTypingNames = map(inferredTypingNames, f => f.replace(/((?:\.|-)min(?=\.|$))|((?:-|\.)\d+)/g, ""));
 
             if (safeList !== EmptySafeList) {
-                mergeTypings(filter(cleanedTypingNames, f => f in safeList));
+                mergeTypings(ts.mapDefined(cleanedTypingNames, f => safeList.get(f)));
             }
 
             const hasJsxFile = forEach(fileNames, f => ensureScriptKind(f, getScriptKindFromFileName(f)) === ScriptKind.JSX);
@@ -177,32 +200,32 @@ namespace ts.JsTyping {
         }
 
         /**
-         * Infer typing names from node_module folder
-         * @param nodeModulesPath is the path to the "node_modules" folder
+         * Infer typing names from packages folder (ex: node_module, bower_components)
+         * @param packagesFolderPath is the path to the packages folder
          */
-        function getTypingNamesFromNodeModuleFolder(nodeModulesPath: string) {
+        function getTypingNamesFromPackagesFolder(packagesFolderPath: string) {
+            filesToWatch.push(packagesFolderPath);
+
             // Todo: add support for ModuleResolutionHost too
-            if (!host.directoryExists(nodeModulesPath)) {
+            if (!host.directoryExists(packagesFolderPath)) {
                 return;
             }
 
             const typingNames: string[] = [];
-            const fileNames = host.readDirectory(nodeModulesPath, [".json"], /*excludes*/ undefined, /*includes*/ undefined, /*depth*/ 2);
+            const fileNames = host.readDirectory(packagesFolderPath, [".json"], /*excludes*/ undefined, /*includes*/ undefined, /*depth*/ 2);
             for (const fileName of fileNames) {
                 const normalizedFileName = normalizePath(fileName);
-                if (getBaseFileName(normalizedFileName) !== "package.json") {
+                const baseFileName = getBaseFileName(normalizedFileName);
+                if (baseFileName !== "package.json" && baseFileName !== "bower.json") {
                     continue;
                 }
                 const result = readConfigFile(normalizedFileName, (path: string) => host.readFile(path));
-                if (!result.config) {
-                    continue;
-                }
                 const packageJson: PackageJson = result.config;
 
                 // npm 3's package.json contains a "_requiredBy" field
                 // we should include all the top level module names for npm 2, and only module names whose
                 // "_requiredBy" field starts with "#" or equals "/" for npm 3.
-                if (packageJson._requiredBy &&
+                if (baseFileName === "package.json" && packageJson._requiredBy &&
                     filter(packageJson._requiredBy, (r: string) => r[0] === "#" || r === "/").length === 0) {
                     continue;
                 }
@@ -214,7 +237,7 @@ namespace ts.JsTyping {
                 }
                 if (packageJson.typings) {
                     const absolutePath = getNormalizedAbsolutePath(packageJson.typings, getDirectoryPath(normalizedFileName));
-                    inferredTypings[packageJson.name] = absolutePath;
+                    inferredTypings.set(packageJson.name, absolutePath);
                 }
                 else {
                     typingNames.push(packageJson.name);
diff --git a/src/services/navigateTo.ts b/src/services/navigateTo.ts
index 44aa25f..304f64f 100644
--- a/src/services/navigateTo.ts
+++ b/src/services/navigateTo.ts
@@ -6,27 +6,22 @@ namespace ts.NavigateTo {
         const patternMatcher = createPatternMatcher(searchValue);
         let rawItems: RawNavigateToItem[] = [];
 
-        // This means "compare in a case insensitive manner."
-        const baseSensitivity: Intl.CollatorOptions = { sensitivity: "base" };
-
         // Search the declarations in all files and output matched NavigateToItem into array of NavigateToItem[]
-        forEach(sourceFiles, sourceFile => {
+        for (const sourceFile of sourceFiles) {
             cancellationToken.throwIfCancellationRequested();
 
-            if (excludeDtsFiles && fileExtensionIs(sourceFile.fileName, ".d.ts")) {
-                return;
+            if (excludeDtsFiles && fileExtensionIs(sourceFile.fileName, Extension.Dts)) {
+                continue;
             }
 
-            const nameToDeclarations = sourceFile.getNamedDeclarations();
-            for (const name in nameToDeclarations) {
-                const declarations = nameToDeclarations[name];
+            forEachEntry(sourceFile.getNamedDeclarations(), (declarations, name) => {
                 if (declarations) {
                     // First do a quick check to see if the name of the declaration matches the
                     // last portion of the (possibly) dotted name they're searching for.
                     let matches = patternMatcher.getMatchesForLastSegmentOfPattern(name);
 
                     if (!matches) {
-                        continue;
+                        return; // continue to next named declarations
                     }
 
                     for (const declaration of declarations) {
@@ -35,13 +30,13 @@ namespace ts.NavigateTo {
                         if (patternMatcher.patternContainsDots) {
                             const containers = getContainers(declaration);
                             if (!containers) {
-                                return undefined;
+                                return true; // Break out of named declarations and go to the next source file.
                             }
 
                             matches = patternMatcher.getMatches(containers, name);
 
                             if (!matches) {
-                                continue;
+                                return; // continue to next named declarations
                             }
                         }
 
@@ -50,14 +45,14 @@ namespace ts.NavigateTo {
                         rawItems.push({ name, fileName, matchKind, isCaseSensitive: allMatchesAreCaseSensitive(matches), declaration });
                     }
                 }
-            }
-        });
+            });
+        }
 
         // Remove imports when the imported declaration is already in the list and has the same name.
         rawItems = filter(rawItems, item => {
             const decl = item.declaration;
             if (decl.kind === SyntaxKind.ImportClause || decl.kind === SyntaxKind.ImportSpecifier || decl.kind === SyntaxKind.ImportEqualsDeclaration) {
-                const importer = checker.getSymbolAtLocation(decl.name);
+                const importer = checker.getSymbolAtLocation((decl as NamedDeclaration).name);
                 const imported = checker.getAliasedSymbol(importer);
                 return importer.name !== imported.name;
             }
@@ -102,17 +97,20 @@ namespace ts.NavigateTo {
         }
 
         function tryAddSingleDeclarationName(declaration: Declaration, containers: string[]) {
-            if (declaration && declaration.name) {
-                const text = getTextOfIdentifierOrLiteral(declaration.name);
-                if (text !== undefined) {
-                    containers.unshift(text);
-                }
-                else if (declaration.name.kind === SyntaxKind.ComputedPropertyName) {
-                    return tryAddComputedPropertyName((<ComputedPropertyName>declaration.name).expression, containers, /*includeLastPortion*/ true);
-                }
-                else {
-                    // Don't know how to add this.
-                    return false;
+            if (declaration) {
+                const name = getNameOfDeclaration(declaration);
+                if (name) {
+                    const text = getTextOfIdentifierOrLiteral(name);
+                    if (text !== undefined) {
+                        containers.unshift(text);
+                    }
+                    else if (name.kind === SyntaxKind.ComputedPropertyName) {
+                        return tryAddComputedPropertyName((<ComputedPropertyName>name).expression, containers, /*includeLastPortion*/ true);
+                    }
+                    else {
+                        // Don't know how to add this.
+                        return false;
+                    }
                 }
             }
 
@@ -148,8 +146,9 @@ namespace ts.NavigateTo {
 
             // First, if we started with a computed property name, then add all but the last
             // portion into the container array.
-            if (declaration.name.kind === SyntaxKind.ComputedPropertyName) {
-                if (!tryAddComputedPropertyName((<ComputedPropertyName>declaration.name).expression, containers, /*includeLastPortion*/ false)) {
+            const name = getNameOfDeclaration(declaration);
+            if (name.kind === SyntaxKind.ComputedPropertyName) {
+                if (!tryAddComputedPropertyName((<ComputedPropertyName>name).expression, containers, /*includeLastPortion*/ false)) {
                     return undefined;
                 }
             }
@@ -188,13 +187,14 @@ namespace ts.NavigateTo {
             // We first sort case insensitively.  So "Aaa" will come before "bar".
             // Then we sort case sensitively, so "aaa" will come before "Aaa".
             return i1.matchKind - i2.matchKind ||
-                i1.name.localeCompare(i2.name, undefined, baseSensitivity) ||
-                i1.name.localeCompare(i2.name);
+                ts.compareStringsCaseInsensitive(i1.name, i2.name) ||
+                ts.compareStrings(i1.name, i2.name);
         }
 
         function createNavigateToItem(rawItem: RawNavigateToItem): NavigateToItem {
             const declaration = rawItem.declaration;
             const container = <Declaration>getContainerNode(declaration);
+            const containerName = container && getNameOfDeclaration(container);
             return {
                 name: rawItem.name,
                 kind: getNodeKind(declaration),
@@ -202,11 +202,11 @@ namespace ts.NavigateTo {
                 matchKind: PatternMatchKind[rawItem.matchKind],
                 isCaseSensitive: rawItem.isCaseSensitive,
                 fileName: rawItem.fileName,
-                textSpan: createTextSpanFromBounds(declaration.getStart(), declaration.getEnd()),
+                textSpan: createTextSpanFromNode(declaration),
                 // TODO(jfreeman): What should be the containerName when the container has a computed name?
-                containerName: container && container.name ? (<Identifier>container.name).text : "",
-                containerKind: container && container.name ? getNodeKind(container) : ""
+                containerName: containerName ? (<Identifier>containerName).text : "",
+                containerKind: containerName ? getNodeKind(container) : ScriptElementKind.unknown
             };
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/services/navigationBar.ts b/src/services/navigationBar.ts
index 5c8c47e..819202f 100644
--- a/src/services/navigationBar.ts
+++ b/src/services/navigationBar.ts
@@ -2,6 +2,36 @@
 
 /* @internal */
 namespace ts.NavigationBar {
+    /**
+     * Matches all whitespace characters in a string. Eg:
+     *
+     * "app.
+     *
+     * onactivated"
+     *
+     * matches because of the newline, whereas
+     *
+     * "app.onactivated"
+     *
+     * does not match.
+     */
+    const whiteSpaceRegex = /\s+/g;
+
+    // Keep sourceFile handy so we don't have to search for it every time we need to call `getText`.
+    let curCancellationToken: CancellationToken;
+    let curSourceFile: SourceFile;
+
+    /**
+     * For performance, we keep navigation bar parents on a stack rather than passing them through each recursion.
+     * `parent` is the current parent and is *not* stored in parentsStack.
+     * `startNode` sets a new parent and `endNode` returns to the previous parent.
+     */
+    let parentsStack: NavigationBarNode[] = [];
+    let parent: NavigationBarNode;
+
+    // NavigationBarItem requires an array, but will not mutate it, so just give it this for performance.
+    let emptyChildItemArray: NavigationBarItem[] = [];
+
     /**
      * Represents a navigation bar item and its children.
      * The returned NavigationBarItem is more complicated and doesn't include 'parent', so we use these to do work before converting.
@@ -14,15 +44,36 @@ namespace ts.NavigationBar {
         indent: number; // # of parents
     }
 
-    export function getNavigationBarItems(sourceFile: SourceFile): NavigationBarItem[] {
+    export function getNavigationBarItems(sourceFile: SourceFile, cancellationToken: CancellationToken): NavigationBarItem[] {
+        curCancellationToken = cancellationToken;
+        curSourceFile = sourceFile;
+        try {
+            return map(topLevelItems(rootNavigationBarNode(sourceFile)), convertToTopLevelItem);
+        }
+        finally {
+            reset();
+        }
+    }
+
+    export function getNavigationTree(sourceFile: SourceFile, cancellationToken: CancellationToken): NavigationTree {
+        curCancellationToken = cancellationToken;
         curSourceFile = sourceFile;
-        const result = map(topLevelItems(rootNavigationBarNode(sourceFile)), convertToTopLevelItem);
+        try {
+            return convertToTree(rootNavigationBarNode(sourceFile));
+        }
+        finally {
+            reset();
+        }
+    }
+
+    function reset() {
         curSourceFile = undefined;
-        return result;
+        curCancellationToken = undefined;
+        parentsStack = [];
+        parent = undefined;
+        emptyChildItemArray = [];
     }
 
-    // Keep sourceFile handy so we don't have to search for it every time we need to call `getText`.
-    let curSourceFile: SourceFile;
     function nodeText(node: Node): string {
         return node.getText(curSourceFile);
     }
@@ -40,14 +91,6 @@ namespace ts.NavigationBar {
         }
     }
 
-    /*
-    For performance, we keep navigation bar parents on a stack rather than passing them through each recursion.
-    `parent` is the current parent and is *not* stored in parentsStack.
-    `startNode` sets a new parent and `endNode` returns to the previous parent.
-    */
-    const parentsStack: NavigationBarNode[] = [];
-    let parent: NavigationBarNode;
-
     function rootNavigationBarNode(sourceFile: SourceFile): NavigationBarNode {
         Debug.assert(!parentsStack.length);
         const root: NavigationBarNode = { node: sourceFile, additionalNodes: undefined, parent: undefined, children: undefined, indent: 0 };
@@ -104,6 +147,8 @@ namespace ts.NavigationBar {
 
     /** Look for navigation bar items in node's subtree, adding them to the current `parent`. */
     function addChildrenRecursively(node: Node): void {
+        curCancellationToken.throwIfCancellationRequested();
+
         if (!node || isToken(node)) {
             return;
         }
@@ -139,7 +184,7 @@ namespace ts.NavigationBar {
                 break;
 
             case SyntaxKind.ImportClause:
-                let importClause = <ImportClause>node;
+                const importClause = <ImportClause>node;
                 // Handle default import case e.g.:
                 //    import d from "mod";
                 if (importClause.name) {
@@ -218,8 +263,8 @@ namespace ts.NavigationBar {
                 break;
 
             default:
-                forEach(node.jsDocComments, jsDocComment => {
-                    forEach(jsDocComment.tags, tag => {
+                forEach(node.jsDoc, jsDoc => {
+                    forEach(jsDoc.tags, tag => {
                         if (tag.kind === SyntaxKind.JSDocTypedefTag) {
                             addLeafNode(tag);
                         }
@@ -234,16 +279,16 @@ namespace ts.NavigationBar {
     function mergeChildren(children: NavigationBarNode[]): void {
         const nameToItems = createMap<NavigationBarNode | NavigationBarNode[]>();
         filterMutate(children, child => {
-            const decl = <Declaration>child.node;
-            const name = decl.name && nodeText(decl.name);
+            const declName = getNameOfDeclaration(<Declaration>child.node);
+            const name = declName && nodeText(declName);
             if (!name) {
                 // Anonymous items are never merged.
                 return true;
             }
 
-            const itemsWithSameName = nameToItems[name];
+            const itemsWithSameName = nameToItems.get(name);
             if (!itemsWithSameName) {
-                nameToItems[name] = child;
+                nameToItems.set(name, child);
                 return true;
             }
 
@@ -261,7 +306,7 @@ namespace ts.NavigationBar {
                 if (tryMerge(itemWithSameName, child)) {
                     return false;
                 }
-                nameToItems[name] = [itemWithSameName, child];
+                nameToItems.set(name, [itemWithSameName, child]);
                 return true;
             }
 
@@ -315,7 +360,7 @@ namespace ts.NavigationBar {
     function compareChildren(child1: NavigationBarNode, child2: NavigationBarNode): number {
         const name1 = tryGetName(child1.node), name2 = tryGetName(child2.node);
         if (name1 && name2) {
-            const cmp = localeCompareFix(name1, name2);
+            const cmp = ts.compareStringsCaseInsensitive(name1, name2);
             return cmp !== 0 ? cmp : navigationBarNodeKind(child1) - navigationBarNodeKind(child2);
         }
         else {
@@ -323,28 +368,6 @@ namespace ts.NavigationBar {
         }
     }
 
-    // More efficient to create a collator once and use its `compare` than to call `a.localeCompare(b)` many times.
-    const collator: { compare(a: string, b: string): number } = typeof Intl === "undefined" ? undefined : new Intl.Collator();
-    // Intl is missing in Safari, and node 0.10 treats "a" as greater than "B".
-    const localeCompareIsCorrect = collator && collator.compare("a", "B") < 0;
-    const localeCompareFix: (a: string, b: string) => number = localeCompareIsCorrect ? collator.compare : function(a, b) {
-        // This isn't perfect, but it passes all of our tests.
-        for (let i = 0; i < Math.min(a.length, b.length); i++) {
-            const chA = a.charAt(i), chB = b.charAt(i);
-            if (chA === "\"" && chB === "'") {
-                return 1;
-            }
-            if (chA === "'" && chB === "\"") {
-                return -1;
-            }
-            const cmp = chA.toLocaleLowerCase().localeCompare(chB.toLocaleLowerCase());
-            if (cmp !== 0) {
-                return cmp;
-            }
-        }
-        return a.length - b.length;
-    };
-
     /**
      * This differs from getItemName because this is just used for sorting.
      * We only sort nodes by name that have a more-or-less "direct" name, as opposed to `new()` and the like.
@@ -355,9 +378,9 @@ namespace ts.NavigationBar {
             return getModuleName(<ModuleDeclaration>node);
         }
 
-        const decl = <Declaration>node;
-        if (decl.name) {
-            return getPropertyNameForPropertyNameNode(decl.name);
+        const declName = getNameOfDeclaration(<Declaration>node);
+        if (declName) {
+            return getPropertyNameForPropertyNameNode(declName);
         }
         switch (node.kind) {
             case SyntaxKind.FunctionExpression:
@@ -376,7 +399,7 @@ namespace ts.NavigationBar {
             return getModuleName(<ModuleDeclaration>node);
         }
 
-        const name = (<Declaration>node).name;
+        const name = getNameOfDeclaration(<Declaration>node);
         if (name) {
             const text = nodeText(name);
             if (text.length > 0) {
@@ -398,6 +421,9 @@ namespace ts.NavigationBar {
                 if (getModifierFlags(node) & ModifierFlags.Default) {
                     return "default";
                 }
+                // We may get a string with newlines or other whitespace in the case of an object dereference
+                // (eg: "app\n.onactivated"), so we should remove the whitespace for readabiltiy in the
+                // navigation bar.
                 return getFunctionOrClassName(<ArrowFunction | FunctionExpression | ClassExpression>node);
             case SyntaxKind.Constructor:
                 return "constructor";
@@ -499,14 +525,21 @@ namespace ts.NavigationBar {
         }
     }
 
-    // NavigationBarItem requires an array, but will not mutate it, so just give it this for performance.
-    const emptyChildItemArray: NavigationBarItem[] = [];
+    function convertToTree(n: NavigationBarNode): NavigationTree {
+        return {
+            text: getItemName(n.node),
+            kind: getNodeKind(n.node),
+            kindModifiers: getModifiers(n.node),
+            spans: getSpans(n),
+            childItems: map(n.children, convertToTree)
+        };
+    }
 
     function convertToTopLevelItem(n: NavigationBarNode): NavigationBarItem {
         return {
             text: getItemName(n.node),
             kind: getNodeKind(n.node),
-            kindModifiers: getNodeModifiers(n.node),
+            kindModifiers: getModifiers(n.node),
             spans: getSpans(n),
             childItems: map(n.children, convertToChildItem) || emptyChildItemArray,
             indent: n.indent,
@@ -526,16 +559,16 @@ namespace ts.NavigationBar {
                 grayed: false
             };
         }
+    }
 
-        function getSpans(n: NavigationBarNode): TextSpan[] {
-            const spans = [getNodeSpan(n.node)];
-            if (n.additionalNodes) {
-                for (const node of n.additionalNodes) {
-                    spans.push(getNodeSpan(node));
-                }
+    function getSpans(n: NavigationBarNode): TextSpan[] {
+        const spans = [getNodeSpan(n.node)];
+        if (n.additionalNodes) {
+            for (const node of n.additionalNodes) {
+                spans.push(getNodeSpan(node));
             }
-            return spans;
         }
+        return spans;
     }
 
     function getModuleName(moduleDeclaration: ModuleDeclaration): string {
@@ -573,7 +606,14 @@ namespace ts.NavigationBar {
     function getNodeSpan(node: Node): TextSpan {
         return node.kind === SyntaxKind.SourceFile
             ? createTextSpanFromBounds(node.getFullStart(), node.getEnd())
-            : createTextSpanFromBounds(node.getStart(curSourceFile), node.getEnd());
+            : createTextSpanFromNode(node, curSourceFile);
+    }
+
+    function getModifiers(node: ts.Node): string {
+        if (node.parent && node.parent.kind === SyntaxKind.VariableDeclaration) {
+            node = node.parent;
+        }
+        return getNodeModifiers(node);
     }
 
     function getFunctionOrClassName(node: FunctionExpression | FunctionDeclaration | ArrowFunction | ClassLikeDeclaration): string {
@@ -587,7 +627,7 @@ namespace ts.NavigationBar {
         // See if it is of the form "<expr> = function(){...}". If so, use the text from the left-hand side.
         else if (node.parent.kind === SyntaxKind.BinaryExpression &&
             (node.parent as BinaryExpression).operatorToken.kind === SyntaxKind.EqualsToken) {
-            return nodeText((node.parent as BinaryExpression).left);
+            return nodeText((node.parent as BinaryExpression).left).replace(whiteSpaceRegex, "");
         }
         // See if it is a property assignment, and if so use the property name
         else if (node.parent.kind === SyntaxKind.PropertyAssignment && (node.parent as PropertyAssignment).name) {
diff --git a/src/services/outliningElementsCollector.ts b/src/services/outliningElementsCollector.ts
index dc2e4a5..5080de2 100644
--- a/src/services/outliningElementsCollector.ts
+++ b/src/services/outliningElementsCollector.ts
@@ -1,6 +1,6 @@
 /* @internal */
 namespace ts.OutliningElementsCollector {
-    export function collectElements(sourceFile: SourceFile): OutliningSpan[] {
+    export function collectElements(sourceFile: SourceFile, cancellationToken: CancellationToken): OutliningSpan[] {
         const elements: OutliningSpan[] = [];
         const collapseText = "...";
 
@@ -8,7 +8,7 @@ namespace ts.OutliningElementsCollector {
             if (hintSpanNode && startElement && endElement) {
                 const span: OutliningSpan = {
                     textSpan: createTextSpanFromBounds(startElement.pos, endElement.end),
-                    hintSpan: createTextSpanFromBounds(hintSpanNode.getStart(), hintSpanNode.end),
+                    hintSpan: createTextSpanFromNode(hintSpanNode, sourceFile),
                     bannerText: collapseText,
                     autoCollapse: autoCollapse
                 };
@@ -38,6 +38,7 @@ namespace ts.OutliningElementsCollector {
                 let singleLineCommentCount = 0;
 
                 for (const currentComment of comments) {
+                    cancellationToken.throwIfCancellationRequested();
 
                     // For single line comments, combine consecutive ones (2 or more) into
                     // a single span from the start of the first till the end of the last
@@ -67,10 +68,10 @@ namespace ts.OutliningElementsCollector {
 
             // Only outline spans of two or more consecutive single line comments
             if (count > 1) {
-                const multipleSingleLineComments = {
+                const multipleSingleLineComments: CommentRange = {
+                    kind: SyntaxKind.SingleLineCommentTrivia,
                     pos: start,
                     end: end,
-                    kind: SyntaxKind.SingleLineCommentTrivia
                 };
 
                 addOutliningSpanComments(multipleSingleLineComments, /*autoCollapse*/ false);
@@ -84,6 +85,7 @@ namespace ts.OutliningElementsCollector {
         let depth = 0;
         const maxDepth = 20;
         function walk(n: Node): void {
+            cancellationToken.throwIfCancellationRequested();
             if (depth > maxDepth) {
                 return;
             }
@@ -135,7 +137,7 @@ namespace ts.OutliningElementsCollector {
 
                         // Block was a standalone block.  In this case we want to only collapse
                         // the span of the block, independent of any parent span.
-                        const span = createTextSpanFromBounds(n.getStart(), n.end);
+                        const span = createTextSpanFromNode(n);
                         elements.push({
                             textSpan: span,
                             hintSpan: span,
@@ -144,7 +146,7 @@ namespace ts.OutliningElementsCollector {
                         });
                         break;
                     }
-                // Fallthrough.
+                    // falls through
 
                 case SyntaxKind.ModuleBlock: {
                     const openBrace = findChildOfKind(n, SyntaxKind.OpenBraceToken, sourceFile);
diff --git a/src/services/pathCompletions.ts b/src/services/pathCompletions.ts
new file mode 100644
index 0000000..3ded126
--- /dev/null
+++ b/src/services/pathCompletions.ts
@@ -0,0 +1,535 @@
+/* @internal */
+namespace ts.Completions.PathCompletions {
+    export function getStringLiteralCompletionEntriesFromModuleNames(node: StringLiteral, compilerOptions: CompilerOptions, host: LanguageServiceHost, typeChecker: TypeChecker): CompletionInfo {
+        const literalValue = normalizeSlashes(node.text);
+
+        const scriptPath = node.getSourceFile().path;
+        const scriptDirectory = getDirectoryPath(scriptPath);
+
+        const span = getDirectoryFragmentTextSpan((<StringLiteral>node).text, node.getStart() + 1);
+        let entries: CompletionEntry[];
+        if (isPathRelativeToScript(literalValue) || isRootedDiskPath(literalValue)) {
+            const extensions = getSupportedExtensions(compilerOptions);
+            if (compilerOptions.rootDirs) {
+                entries = getCompletionEntriesForDirectoryFragmentWithRootDirs(
+                    compilerOptions.rootDirs, literalValue, scriptDirectory, extensions, /*includeExtensions*/ false, span, compilerOptions, host, scriptPath);
+            }
+            else {
+                entries = getCompletionEntriesForDirectoryFragment(
+                    literalValue, scriptDirectory, extensions, /*includeExtensions*/ false, span, host, scriptPath);
+            }
+        }
+        else {
+            // Check for node modules
+            entries = getCompletionEntriesForNonRelativeModules(literalValue, scriptDirectory, span, compilerOptions, host, typeChecker);
+        }
+        return {
+            isGlobalCompletion: false,
+            isMemberCompletion: false,
+            isNewIdentifierLocation: true,
+            entries
+        };
+    }
+
+    /**
+     * Takes a script path and returns paths for all potential folders that could be merged with its
+     * containing folder via the "rootDirs" compiler option
+     */
+    function getBaseDirectoriesFromRootDirs(rootDirs: string[], basePath: string, scriptPath: string, ignoreCase: boolean): string[] {
+        // Make all paths absolute/normalized if they are not already
+        rootDirs = map(rootDirs, rootDirectory => normalizePath(isRootedDiskPath(rootDirectory) ? rootDirectory : combinePaths(basePath, rootDirectory)));
+
+        // Determine the path to the directory containing the script relative to the root directory it is contained within
+        let relativeDirectory: string;
+        for (const rootDirectory of rootDirs) {
+            if (containsPath(rootDirectory, scriptPath, basePath, ignoreCase)) {
+                relativeDirectory = scriptPath.substr(rootDirectory.length);
+                break;
+            }
+        }
+
+        // Now find a path for each potential directory that is to be merged with the one containing the script
+        return deduplicate(map(rootDirs, rootDirectory => combinePaths(rootDirectory, relativeDirectory)));
+    }
+
+    function getCompletionEntriesForDirectoryFragmentWithRootDirs(rootDirs: string[], fragment: string, scriptPath: string, extensions: string[], includeExtensions: boolean, span: TextSpan, compilerOptions: CompilerOptions, host: LanguageServiceHost, exclude?: string): CompletionEntry[] {
+        const basePath = compilerOptions.project || host.getCurrentDirectory();
+        const ignoreCase = !(host.useCaseSensitiveFileNames && host.useCaseSensitiveFileNames());
+        const baseDirectories = getBaseDirectoriesFromRootDirs(rootDirs, basePath, scriptPath, ignoreCase);
+
+        const result: CompletionEntry[] = [];
+
+        for (const baseDirectory of baseDirectories) {
+            getCompletionEntriesForDirectoryFragment(fragment, baseDirectory, extensions, includeExtensions, span, host, exclude, result);
+        }
+
+        return result;
+    }
+
+    /**
+     * Given a path ending at a directory, gets the completions for the path, and filters for those entries containing the basename.
+     */
+    function getCompletionEntriesForDirectoryFragment(fragment: string, scriptPath: string, extensions: string[], includeExtensions: boolean, span: TextSpan, host: LanguageServiceHost, exclude?: string, result: CompletionEntry[] = []): CompletionEntry[] {
+        if (fragment === undefined) {
+            fragment = "";
+        }
+
+        fragment = normalizeSlashes(fragment);
+
+        /**
+         * Remove the basename from the path. Note that we don't use the basename to filter completions;
+         * the client is responsible for refining completions.
+         */
+        fragment = getDirectoryPath(fragment);
+
+        if (fragment === "") {
+            fragment = "." + directorySeparator;
+        }
+
+        fragment = ensureTrailingDirectorySeparator(fragment);
+
+        const absolutePath = normalizeAndPreserveTrailingSlash(isRootedDiskPath(fragment) ? fragment : combinePaths(scriptPath, fragment));
+        const baseDirectory = getDirectoryPath(absolutePath);
+        const ignoreCase = !(host.useCaseSensitiveFileNames && host.useCaseSensitiveFileNames());
+
+        if (tryDirectoryExists(host, baseDirectory)) {
+            // Enumerate the available files if possible
+            const files = tryReadDirectory(host, baseDirectory, extensions, /*exclude*/ undefined, /*include*/ ["./*"]);
+
+            if (files) {
+                /**
+                 * Multiple file entries might map to the same truncated name once we remove extensions
+                 * (happens iff includeExtensions === false)so we use a set-like data structure. Eg:
+                 *
+                 * both foo.ts and foo.tsx become foo
+                 */
+                const foundFiles = createMap<boolean>();
+                for (let filePath of files) {
+                    filePath = normalizePath(filePath);
+                    if (exclude && comparePaths(filePath, exclude, scriptPath, ignoreCase) === Comparison.EqualTo) {
+                        continue;
+                    }
+
+                    const foundFileName = includeExtensions ? getBaseFileName(filePath) : removeFileExtension(getBaseFileName(filePath));
+
+                    if (!foundFiles.get(foundFileName)) {
+                        foundFiles.set(foundFileName, true);
+                    }
+                }
+
+                forEachKey(foundFiles, foundFile => {
+                    result.push(createCompletionEntryForModule(foundFile, ScriptElementKind.scriptElement, span));
+                });
+            }
+
+            // If possible, get folder completion as well
+            const directories = tryGetDirectories(host, baseDirectory);
+
+            if (directories) {
+                for (const directory of directories) {
+                    const directoryName = getBaseFileName(normalizePath(directory));
+
+                    result.push(createCompletionEntryForModule(directoryName, ScriptElementKind.directory, span));
+                }
+            }
+        }
+
+        return result;
+    }
+
+    /**
+     * Check all of the declared modules and those in node modules. Possible sources of modules:
+     *      Modules that are found by the type checker
+     *      Modules found relative to "baseUrl" compliler options (including patterns from "paths" compiler option)
+     *      Modules from node_modules (i.e. those listed in package.json)
+     *          This includes all files that are found in node_modules/moduleName/ with acceptable file extensions
+     */
+    function getCompletionEntriesForNonRelativeModules(fragment: string, scriptPath: string, span: TextSpan, compilerOptions: CompilerOptions, host: LanguageServiceHost, typeChecker: TypeChecker): CompletionEntry[] {
+        const { baseUrl, paths } = compilerOptions;
+
+        let result: CompletionEntry[];
+
+        if (baseUrl) {
+            const fileExtensions = getSupportedExtensions(compilerOptions);
+            const projectDir = compilerOptions.project || host.getCurrentDirectory();
+            const absolute = isRootedDiskPath(baseUrl) ? baseUrl : combinePaths(projectDir, baseUrl);
+            result = getCompletionEntriesForDirectoryFragment(fragment, normalizePath(absolute), fileExtensions, /*includeExtensions*/ false, span, host);
+
+            if (paths) {
+                for (const path in paths) {
+                    if (paths.hasOwnProperty(path)) {
+                        if (path === "*") {
+                            if (paths[path]) {
+                                for (const pattern of paths[path]) {
+                                    for (const match of getModulesForPathsPattern(fragment, baseUrl, pattern, fileExtensions, host)) {
+                                        result.push(createCompletionEntryForModule(match, ScriptElementKind.externalModuleName, span));
+                                    }
+                                }
+                            }
+                        }
+                        else if (startsWith(path, fragment)) {
+                            const entry = paths[path] && paths[path].length === 1 && paths[path][0];
+                            if (entry) {
+                                result.push(createCompletionEntryForModule(path, ScriptElementKind.externalModuleName, span));
+                            }
+                        }
+                    }
+                }
+            }
+        }
+        else {
+            result = [];
+        }
+
+        getCompletionEntriesFromTypings(host, compilerOptions, scriptPath, span, result);
+
+        for (const moduleName of enumeratePotentialNonRelativeModules(fragment, scriptPath, compilerOptions, typeChecker, host)) {
+            result.push(createCompletionEntryForModule(moduleName, ScriptElementKind.externalModuleName, span));
+        }
+
+        return result;
+    }
+
+    function getModulesForPathsPattern(fragment: string, baseUrl: string, pattern: string, fileExtensions: string[], host: LanguageServiceHost): string[] {
+        if (host.readDirectory) {
+            const parsed = hasZeroOrOneAsteriskCharacter(pattern) ? tryParsePattern(pattern) : undefined;
+            if (parsed) {
+                // The prefix has two effective parts: the directory path and the base component after the filepath that is not a
+                // full directory component. For example: directory/path/of/prefix/base*
+                const normalizedPrefix = normalizeAndPreserveTrailingSlash(parsed.prefix);
+                const normalizedPrefixDirectory = getDirectoryPath(normalizedPrefix);
+                const normalizedPrefixBase = getBaseFileName(normalizedPrefix);
+
+                const fragmentHasPath = fragment.indexOf(directorySeparator) !== -1;
+
+                // Try and expand the prefix to include any path from the fragment so that we can limit the readDirectory call
+                const expandedPrefixDirectory = fragmentHasPath ? combinePaths(normalizedPrefixDirectory, normalizedPrefixBase + getDirectoryPath(fragment)) : normalizedPrefixDirectory;
+
+                const normalizedSuffix = normalizePath(parsed.suffix);
+                const baseDirectory = combinePaths(baseUrl, expandedPrefixDirectory);
+                const completePrefix = fragmentHasPath ? baseDirectory : ensureTrailingDirectorySeparator(baseDirectory) + normalizedPrefixBase;
+
+                // If we have a suffix, then we need to read the directory all the way down. We could create a glob
+                // that encodes the suffix, but we would have to escape the character "?" which readDirectory
+                // doesn't support. For now, this is safer but slower
+                const includeGlob = normalizedSuffix ? "**/*" : "./*";
+
+                const matches = tryReadDirectory(host, baseDirectory, fileExtensions, /*exclude*/ undefined, [includeGlob]);
+                if (matches) {
+                    const result: string[] = [];
+
+                    // Trim away prefix and suffix
+                    for (const match of matches) {
+                        const normalizedMatch = normalizePath(match);
+                        if (!endsWith(normalizedMatch, normalizedSuffix) || !startsWith(normalizedMatch, completePrefix)) {
+                            continue;
+                        }
+
+                        const start = completePrefix.length;
+                        const length = normalizedMatch.length - start - normalizedSuffix.length;
+
+                        result.push(removeFileExtension(normalizedMatch.substr(start, length)));
+                    }
+                    return result;
+                }
+            }
+        }
+
+        return undefined;
+    }
+
+    function enumeratePotentialNonRelativeModules(fragment: string, scriptPath: string, options: CompilerOptions, typeChecker: TypeChecker, host: LanguageServiceHost): string[] {
+        // Check If this is a nested module
+        const isNestedModule = fragment.indexOf(directorySeparator) !== -1;
+        const moduleNameFragment = isNestedModule ? fragment.substr(0, fragment.lastIndexOf(directorySeparator)) : undefined;
+
+        // Get modules that the type checker picked up
+        const ambientModules = map(typeChecker.getAmbientModules(), sym => stripQuotes(sym.name));
+        let nonRelativeModuleNames = filter(ambientModules, moduleName => startsWith(moduleName, fragment));
+
+        // Nested modules of the form "module-name/sub" need to be adjusted to only return the string
+        // after the last '/' that appears in the fragment because that's where the replacement span
+        // starts
+        if (isNestedModule) {
+            const moduleNameWithSeperator = ensureTrailingDirectorySeparator(moduleNameFragment);
+            nonRelativeModuleNames = map(nonRelativeModuleNames, nonRelativeModuleName => {
+                return removePrefix(nonRelativeModuleName, moduleNameWithSeperator);
+            });
+        }
+
+
+        if (!options.moduleResolution || options.moduleResolution === ModuleResolutionKind.NodeJs) {
+            for (const visibleModule of enumerateNodeModulesVisibleToScript(host, scriptPath)) {
+                if (!isNestedModule) {
+                    nonRelativeModuleNames.push(visibleModule.moduleName);
+                }
+                else if (startsWith(visibleModule.moduleName, moduleNameFragment)) {
+                    const nestedFiles = tryReadDirectory(host, visibleModule.moduleDir, supportedTypeScriptExtensions, /*exclude*/ undefined, /*include*/ ["./*"]);
+                    if (nestedFiles) {
+                        for (let f of nestedFiles) {
+                            f = normalizePath(f);
+                            const nestedModule = removeFileExtension(getBaseFileName(f));
+                            nonRelativeModuleNames.push(nestedModule);
+                        }
+                    }
+                }
+            }
+        }
+
+        return deduplicate(nonRelativeModuleNames);
+    }
+
+    export function getTripleSlashReferenceCompletion(sourceFile: SourceFile, position: number, compilerOptions: CompilerOptions, host: LanguageServiceHost): CompletionInfo {
+        const token = getTokenAtPosition(sourceFile, position, /*includeJsDocComment*/ false);
+        if (!token) {
+            return undefined;
+        }
+        const commentRanges: CommentRange[] = getLeadingCommentRanges(sourceFile.text, token.pos);
+
+        if (!commentRanges || !commentRanges.length) {
+            return undefined;
+        }
+
+        const range = forEach(commentRanges, commentRange => position >= commentRange.pos && position <= commentRange.end && commentRange);
+
+        if (!range) {
+            return undefined;
+        }
+
+        const completionInfo: CompletionInfo = {
+            /**
+             * We don't want the editor to offer any other completions, such as snippets, inside a comment.
+             */
+            isGlobalCompletion: false,
+            isMemberCompletion: false,
+            /**
+             * The user may type in a path that doesn't yet exist, creating a "new identifier"
+             * with respect to the collection of identifiers the server is aware of.
+             */
+            isNewIdentifierLocation: true,
+
+            entries: []
+        };
+
+        const text = sourceFile.text.substr(range.pos, position - range.pos);
+
+        const match = tripleSlashDirectiveFragmentRegex.exec(text);
+
+        if (match) {
+            const prefix = match[1];
+            const kind = match[2];
+            const toComplete = match[3];
+
+            const scriptPath = getDirectoryPath(sourceFile.path);
+            if (kind === "path") {
+                // Give completions for a relative path
+                const span: TextSpan = getDirectoryFragmentTextSpan(toComplete, range.pos + prefix.length);
+                completionInfo.entries = getCompletionEntriesForDirectoryFragment(toComplete, scriptPath, getSupportedExtensions(compilerOptions), /*includeExtensions*/ true, span, host, sourceFile.path);
+            }
+            else {
+                // Give completions based on the typings available
+                const span: TextSpan = { start: range.pos + prefix.length, length: match[0].length - prefix.length };
+                completionInfo.entries = getCompletionEntriesFromTypings(host, compilerOptions, scriptPath, span);
+            }
+        }
+
+        return completionInfo;
+    }
+
+    function getCompletionEntriesFromTypings(host: LanguageServiceHost, options: CompilerOptions, scriptPath: string, span: TextSpan, result: CompletionEntry[] = []): CompletionEntry[] {
+        // Check for typings specified in compiler options
+        if (options.types) {
+            for (const moduleName of options.types) {
+                result.push(createCompletionEntryForModule(moduleName, ScriptElementKind.externalModuleName, span));
+            }
+        }
+        else if (host.getDirectories) {
+            let typeRoots: string[];
+            try {
+                // Wrap in try catch because getEffectiveTypeRoots touches the filesystem
+                typeRoots = getEffectiveTypeRoots(options, host);
+            }
+            catch (e) {}
+
+            if (typeRoots) {
+                for (const root of typeRoots) {
+                    getCompletionEntriesFromDirectories(host, root, span, result);
+                }
+            }
+        }
+
+        if (host.getDirectories) {
+            // Also get all @types typings installed in visible node_modules directories
+            for (const packageJson of findPackageJsons(scriptPath, host)) {
+                const typesDir = combinePaths(getDirectoryPath(packageJson), "node_modules/@types");
+                getCompletionEntriesFromDirectories(host, typesDir, span, result);
+            }
+        }
+
+        return result;
+    }
+
+    function getCompletionEntriesFromDirectories(host: LanguageServiceHost, directory: string, span: TextSpan, result: Push<CompletionEntry>) {
+        if (host.getDirectories && tryDirectoryExists(host, directory)) {
+            const directories = tryGetDirectories(host, directory);
+            if (directories) {
+                for (let typeDirectory of directories) {
+                    typeDirectory = normalizePath(typeDirectory);
+                    result.push(createCompletionEntryForModule(getBaseFileName(typeDirectory), ScriptElementKind.externalModuleName, span));
+                }
+            }
+        }
+    }
+
+    function findPackageJsons(currentDir: string, host: LanguageServiceHost): string[] {
+        const paths: string[] = [];
+        let currentConfigPath: string;
+        while (true) {
+            currentConfigPath = findConfigFile(currentDir, (f) => tryFileExists(host, f), "package.json");
+            if (currentConfigPath) {
+                paths.push(currentConfigPath);
+
+                currentDir = getDirectoryPath(currentConfigPath);
+                const parent = getDirectoryPath(currentDir);
+                if (currentDir === parent) {
+                    break;
+                }
+                currentDir = parent;
+            }
+            else {
+                break;
+            }
+        }
+
+        return paths;
+    }
+
+    function enumerateNodeModulesVisibleToScript(host: LanguageServiceHost, scriptPath: string) {
+        const result: VisibleModuleInfo[] = [];
+
+        if (host.readFile && host.fileExists) {
+            for (const packageJson of findPackageJsons(scriptPath, host)) {
+                const contents = tryReadingPackageJson(packageJson);
+                if (!contents) {
+                    return;
+                }
+
+                const nodeModulesDir = combinePaths(getDirectoryPath(packageJson), "node_modules");
+                const foundModuleNames: string[] = [];
+
+                // Provide completions for all non @types dependencies
+                for (const key of nodeModulesDependencyKeys) {
+                    addPotentialPackageNames(contents[key], foundModuleNames);
+                }
+
+                for (const moduleName of foundModuleNames) {
+                    const moduleDir = combinePaths(nodeModulesDir, moduleName);
+                    result.push({
+                        moduleName,
+                        moduleDir
+                    });
+                }
+            }
+        }
+
+        return result;
+
+        function tryReadingPackageJson(filePath: string) {
+            try {
+                const fileText = tryReadFile(host, filePath);
+                return fileText ? JSON.parse(fileText) : undefined;
+            }
+            catch (e) {
+                return undefined;
+            }
+        }
+
+        function addPotentialPackageNames(dependencies: any, result: string[]) {
+            if (dependencies) {
+                for (const dep in dependencies) {
+                    if (dependencies.hasOwnProperty(dep) && !startsWith(dep, "@types/")) {
+                        result.push(dep);
+                    }
+                }
+            }
+        }
+    }
+
+    function createCompletionEntryForModule(name: string, kind: ScriptElementKind, replacementSpan: TextSpan): CompletionEntry {
+        return { name, kind, kindModifiers: ScriptElementKindModifier.none, sortText: name, replacementSpan };
+    }
+
+    // Replace everything after the last directory seperator that appears
+    function getDirectoryFragmentTextSpan(text: string, textStart: number): TextSpan {
+        const index = text.lastIndexOf(directorySeparator);
+        const offset = index !== -1 ? index + 1 : 0;
+        return { start: textStart + offset, length: text.length - offset };
+    }
+
+    // Returns true if the path is explicitly relative to the script (i.e. relative to . or ..)
+    function isPathRelativeToScript(path: string) {
+        if (path && path.length >= 2 && path.charCodeAt(0) === CharacterCodes.dot) {
+            const slashIndex = path.length >= 3 && path.charCodeAt(1) === CharacterCodes.dot ? 2 : 1;
+            const slashCharCode = path.charCodeAt(slashIndex);
+            return slashCharCode === CharacterCodes.slash || slashCharCode === CharacterCodes.backslash;
+        }
+        return false;
+    }
+
+    function normalizeAndPreserveTrailingSlash(path: string) {
+        return hasTrailingDirectorySeparator(path) ? ensureTrailingDirectorySeparator(normalizePath(path)) : normalizePath(path);
+    }
+
+    /**
+     * Matches a triple slash reference directive with an incomplete string literal for its path. Used
+     * to determine if the caret is currently within the string literal and capture the literal fragment
+     * for completions.
+     * For example, this matches
+     *
+     * /// <reference path="fragment
+     *
+     * but not
+     *
+     * /// <reference path="fragment"
+     */
+    const tripleSlashDirectiveFragmentRegex = /^(\/\/\/\s*<reference\s+(path|types)\s*=\s*(?:'|"))([^\3"]*)$/;
+
+    interface VisibleModuleInfo {
+        moduleName: string;
+        moduleDir: string;
+    }
+
+    const nodeModulesDependencyKeys = ["dependencies", "devDependencies", "peerDependencies", "optionalDependencies"];
+
+    function tryGetDirectories(host: LanguageServiceHost, directoryName: string): string[] {
+        return tryIOAndConsumeErrors(host, host.getDirectories, directoryName);
+    }
+
+    function tryReadDirectory(host: LanguageServiceHost, path: string, extensions?: string[], exclude?: string[], include?: string[]): string[] {
+        return tryIOAndConsumeErrors(host, host.readDirectory, path, extensions, exclude, include);
+    }
+
+    function tryReadFile(host: LanguageServiceHost, path: string): string {
+        return tryIOAndConsumeErrors(host, host.readFile, path);
+    }
+
+    function tryFileExists(host: LanguageServiceHost, path: string): boolean {
+        return tryIOAndConsumeErrors(host, host.fileExists, path);
+    }
+
+    function tryDirectoryExists(host: LanguageServiceHost, path: string): boolean {
+        try {
+            return directoryProbablyExists(path, host);
+        }
+        catch (e) {}
+        return undefined;
+    }
+
+    function tryIOAndConsumeErrors<T>(host: LanguageServiceHost, toApply: (...a: any[]) => T, ...args: any[]) {
+        try {
+            return toApply && toApply.apply(host, args);
+        }
+        catch (e) {}
+        return undefined;
+    }
+}
diff --git a/src/services/patternMatcher.ts b/src/services/patternMatcher.ts
index b4f67ca..396e538 100644
--- a/src/services/patternMatcher.ts
+++ b/src/services/patternMatcher.ts
@@ -188,11 +188,11 @@ namespace ts {
         }
 
         function getWordSpans(word: string): TextSpan[] {
-            if (!(word in stringToWordSpans)) {
-                stringToWordSpans[word] = breakIntoWordSpans(word);
+            let spans = stringToWordSpans.get(word);
+            if (!spans) {
+                stringToWordSpans.set(word, spans = breakIntoWordSpans(word));
             }
-
-            return stringToWordSpans[word];
+            return spans;
         }
 
         function matchTextChunk(candidate: string, chunk: TextChunk, punctuationStripped: boolean): PatternMatch {
@@ -516,7 +516,8 @@ namespace ts {
 
     // Assumes 'value' is already lowercase.
     function indexOfIgnoringCase(string: string, value: string): number {
-        for (let i = 0, n = string.length - value.length; i <= n; i++) {
+        const n = string.length - value.length;
+        for (let i = 0; i <= n; i++) {
             if (startsWithIgnoringCase(string, value, i)) {
                 return i;
             }
@@ -527,7 +528,7 @@ namespace ts {
 
     // Assumes 'value' is already lowercase.
     function startsWithIgnoringCase(string: string, value: string, start: number): boolean {
-        for (let i = 0, n = value.length; i < n; i++) {
+        for (let i = 0; i < value.length; i++) {
             const ch1 = toLowerCase(string.charCodeAt(i + start));
             const ch2 = value.charCodeAt(i);
 
@@ -613,7 +614,7 @@ namespace ts {
         const result: TextSpan[] = [];
 
         let wordStart = 0;
-        for (let i = 1, n = identifier.length; i < n; i++) {
+        for (let i = 1; i < identifier.length; i++) {
             const lastIsDigit = isDigit(identifier.charCodeAt(i - 1));
             const currentIsDigit = isDigit(identifier.charCodeAt(i));
 
diff --git a/src/services/preProcess.ts b/src/services/preProcess.ts
index 0f07020..7efc174 100644
--- a/src/services/preProcess.ts
+++ b/src/services/preProcess.ts
@@ -95,9 +95,16 @@ namespace ts {
         function tryConsumeImport(): boolean {
             let token = scanner.getToken();
             if (token === SyntaxKind.ImportKeyword) {
-
                 token = nextToken();
-                if (token === SyntaxKind.StringLiteral) {
+                if (token === SyntaxKind.OpenParenToken) {
+                    token = nextToken();
+                    if (token === SyntaxKind.StringLiteral) {
+                        // import("mod");
+                        recordModuleName();
+                        return true;
+                    }
+                }
+                else if (token === SyntaxKind.StringLiteral) {
                     // import "mod";
                     recordModuleName();
                     return true;
@@ -297,7 +304,8 @@ namespace ts {
             //    import * as NS  from "mod"
             //    import d, {a, b as B} from "mod"
             //    import i = require("mod");
-            //
+            //    import("mod");
+
             //    export * from "mod"
             //    export {a as b} from "mod"
             //    export import i = require("mod")
diff --git a/src/services/refactorProvider.ts b/src/services/refactorProvider.ts
new file mode 100644
index 0000000..3c02ddf
--- /dev/null
+++ b/src/services/refactorProvider.ts
@@ -0,0 +1,59 @@
+/* @internal */
+namespace ts {
+    export interface Refactor {
+        /** An unique code associated with each refactor */
+        name: string;
+
+        /** Description of the refactor to display in the UI of the editor */
+        description: string;
+
+        /** Compute the associated code actions */
+        getEditsForAction(context: RefactorContext, actionName: string): RefactorEditInfo | undefined;
+
+        /** Compute (quickly) which actions are available here */
+        getAvailableActions(context: RefactorContext): ApplicableRefactorInfo[] | undefined;
+    }
+
+    export interface RefactorContext {
+        file: SourceFile;
+        startPosition: number;
+        endPosition?: number;
+        program: Program;
+        newLineCharacter: string;
+        rulesProvider?: formatting.RulesProvider;
+        cancellationToken?: CancellationToken;
+    }
+
+    export namespace refactor {
+        // A map with the refactor code as key, the refactor itself as value
+        // e.g.  nonSuggestableRefactors[refactorCode] -> the refactor you want
+        const refactors: Map<Refactor> = createMap<Refactor>();
+
+        export function registerRefactor(refactor: Refactor) {
+            refactors.set(refactor.name, refactor);
+        }
+
+        export function getApplicableRefactors(context: RefactorContext): ApplicableRefactorInfo[] | undefined {
+            let results: ApplicableRefactorInfo[];
+            const refactorList: Refactor[] = [];
+            refactors.forEach(refactor => {
+                refactorList.push(refactor);
+            });
+            for (const refactor of refactorList) {
+                if (context.cancellationToken && context.cancellationToken.isCancellationRequested()) {
+                    return results;
+                }
+                const infos = refactor.getAvailableActions(context);
+                if (infos && infos.length) {
+                    (results || (results = [])).push(...infos);
+                }
+            }
+            return results;
+        }
+
+        export function getEditsForRefactor(context: RefactorContext, refactorName: string, actionName: string): RefactorEditInfo | undefined {
+            const refactor = refactors.get(refactorName);
+            return refactor && refactor.getEditsForAction(context, actionName);
+        }
+    }
+}
diff --git a/src/services/refactors/convertFunctionToEs6Class.ts b/src/services/refactors/convertFunctionToEs6Class.ts
new file mode 100644
index 0000000..d275924
--- /dev/null
+++ b/src/services/refactors/convertFunctionToEs6Class.ts
@@ -0,0 +1,228 @@
+/* @internal */
+
+namespace ts.refactor {
+    const actionName = "convert";
+
+    const convertFunctionToES6Class: Refactor = {
+        name: "Convert to ES2015 class",
+        description: Diagnostics.Convert_function_to_an_ES2015_class.message,
+        getEditsForAction,
+        getAvailableActions
+    };
+
+    registerRefactor(convertFunctionToES6Class);
+
+    function getAvailableActions(context: RefactorContext): ApplicableRefactorInfo[] {
+        const start = context.startPosition;
+        const node = getTokenAtPosition(context.file, start, /*includeJsDocComment*/ false);
+        const checker = context.program.getTypeChecker();
+        let symbol = checker.getSymbolAtLocation(node);
+
+        if (symbol && isDeclarationOfFunctionOrClassExpression(symbol)) {
+            symbol = (symbol.valueDeclaration as VariableDeclaration).initializer.symbol;
+        }
+
+        if (symbol && (symbol.flags & SymbolFlags.Function) && symbol.members && (symbol.members.size > 0)) {
+            return [
+                {
+                    name: convertFunctionToES6Class.name,
+                    description: convertFunctionToES6Class.description,
+                    actions: [
+                        {
+                            description: convertFunctionToES6Class.description,
+                            name: actionName
+                        }
+                    ]
+                }
+            ];
+        }
+    }
+
+    function getEditsForAction(context: RefactorContext, action: string): RefactorEditInfo | undefined {
+        // Somehow wrong action got invoked?
+        if (actionName !== action) {
+            return undefined;
+        }
+
+        const start = context.startPosition;
+        const sourceFile = context.file;
+        const checker = context.program.getTypeChecker();
+        const token = getTokenAtPosition(sourceFile, start, /*includeJsDocComment*/ false);
+        const ctorSymbol = checker.getSymbolAtLocation(token);
+        const newLine = context.rulesProvider.getFormatOptions().newLineCharacter;
+
+        const deletedNodes: Node[] = [];
+        const deletes: (() => any)[] = [];
+
+        if (!(ctorSymbol.flags & (SymbolFlags.Function | SymbolFlags.Variable))) {
+            return undefined;
+        }
+
+        const ctorDeclaration = ctorSymbol.valueDeclaration;
+        const changeTracker = textChanges.ChangeTracker.fromCodeFixContext(context as { newLineCharacter: string, rulesProvider: formatting.RulesProvider });
+
+        let precedingNode: Node;
+        let newClassDeclaration: ClassDeclaration;
+        switch (ctorDeclaration.kind) {
+            case SyntaxKind.FunctionDeclaration:
+                precedingNode = ctorDeclaration;
+                deleteNode(ctorDeclaration);
+                newClassDeclaration = createClassFromFunctionDeclaration(ctorDeclaration as FunctionDeclaration);
+                break;
+
+            case SyntaxKind.VariableDeclaration:
+                precedingNode = ctorDeclaration.parent.parent;
+                if ((<VariableDeclarationList>ctorDeclaration.parent).declarations.length === 1) {
+                    deleteNode(precedingNode);
+                }
+                else {
+                    deleteNode(ctorDeclaration, /*inList*/ true);
+                }
+                newClassDeclaration = createClassFromVariableDeclaration(ctorDeclaration as VariableDeclaration);
+                break;
+        }
+
+        if (!newClassDeclaration) {
+            return undefined;
+        }
+
+        // Because the preceding node could be touched, we need to insert nodes before delete nodes.
+        changeTracker.insertNodeAfter(sourceFile, precedingNode, newClassDeclaration, { suffix: newLine });
+        for (const deleteCallback of deletes) {
+            deleteCallback();
+        }
+
+        return {
+            edits: changeTracker.getChanges()
+        };
+
+        function deleteNode(node: Node, inList = false) {
+            if (deletedNodes.some(n => isNodeDescendantOf(node, n))) {
+                // Parent node has already been deleted; do nothing
+                return;
+            }
+            deletedNodes.push(node);
+            if (inList) {
+                deletes.push(() => changeTracker.deleteNodeInList(sourceFile, node));
+            }
+            else {
+                deletes.push(() => changeTracker.deleteNode(sourceFile, node));
+            }
+        }
+
+        function createClassElementsFromSymbol(symbol: Symbol) {
+            const memberElements: ClassElement[] = [];
+            // all instance members are stored in the "member" array of symbol
+            if (symbol.members) {
+                symbol.members.forEach(member => {
+                    const memberElement = createClassElement(member, /*modifiers*/ undefined);
+                    if (memberElement) {
+                        memberElements.push(memberElement);
+                    }
+                });
+            }
+
+            // all static members are stored in the "exports" array of symbol
+            if (symbol.exports) {
+                symbol.exports.forEach(member => {
+                    const memberElement = createClassElement(member, [createToken(SyntaxKind.StaticKeyword)]);
+                    if (memberElement) {
+                        memberElements.push(memberElement);
+                    }
+                });
+            }
+
+            return memberElements;
+
+            function shouldConvertDeclaration(_target: PropertyAccessExpression, source: Expression) {
+                // Right now the only thing we can convert are function expressions - other values shouldn't get
+                // transformed. We can update this once ES public class properties are available.
+                return isFunctionLike(source);
+            }
+
+            function createClassElement(symbol: Symbol, modifiers: Modifier[]): ClassElement {
+                // both properties and methods are bound as property symbols
+                if (!(symbol.flags & SymbolFlags.Property)) {
+                    return;
+                }
+
+                const memberDeclaration = symbol.valueDeclaration as PropertyAccessExpression;
+                const assignmentBinaryExpression = memberDeclaration.parent as BinaryExpression;
+
+                if (!shouldConvertDeclaration(memberDeclaration, assignmentBinaryExpression.right)) {
+                    return;
+                }
+
+                // delete the entire statement if this expression is the sole expression to take care of the semicolon at the end
+                const nodeToDelete = assignmentBinaryExpression.parent && assignmentBinaryExpression.parent.kind === SyntaxKind.ExpressionStatement
+                    ? assignmentBinaryExpression.parent : assignmentBinaryExpression;
+                deleteNode(nodeToDelete);
+
+                if (!assignmentBinaryExpression.right) {
+                    return createProperty([], modifiers, symbol.name, /*questionToken*/ undefined,
+                        /*type*/ undefined, /*initializer*/ undefined);
+                }
+
+                switch (assignmentBinaryExpression.right.kind) {
+                    case SyntaxKind.FunctionExpression:
+                        const functionExpression = assignmentBinaryExpression.right as FunctionExpression;
+                        return createMethod(/*decorators*/ undefined, modifiers, /*asteriskToken*/ undefined, memberDeclaration.name, /*questionToken*/ undefined,
+                            /*typeParameters*/ undefined, functionExpression.parameters, /*type*/ undefined, functionExpression.body);
+
+                    case SyntaxKind.ArrowFunction:
+                        const arrowFunction = assignmentBinaryExpression.right as ArrowFunction;
+                        const arrowFunctionBody = arrowFunction.body;
+                        let bodyBlock: Block;
+
+                        // case 1: () => { return [1,2,3] }
+                        if (arrowFunctionBody.kind === SyntaxKind.Block) {
+                            bodyBlock = arrowFunctionBody as Block;
+                        }
+                        // case 2: () => [1,2,3]
+                        else {
+                            const expression = arrowFunctionBody as Expression;
+                            bodyBlock = createBlock([createReturn(expression)]);
+                        }
+                        return createMethod(/*decorators*/ undefined, modifiers, /*asteriskToken*/ undefined, memberDeclaration.name, /*questionToken*/ undefined,
+                            /*typeParameters*/ undefined, arrowFunction.parameters, /*type*/ undefined, bodyBlock);
+
+                    default:
+                        // Don't try to declare members in JavaScript files
+                        if (isSourceFileJavaScript(sourceFile)) {
+                            return;
+                        }
+                        return createProperty(/*decorators*/ undefined, modifiers, memberDeclaration.name, /*questionToken*/ undefined,
+                            /*type*/ undefined, assignmentBinaryExpression.right);
+                }
+            }
+        }
+
+        function createClassFromVariableDeclaration(node: VariableDeclaration): ClassDeclaration {
+            const initializer = node.initializer as FunctionExpression;
+            if (!initializer || initializer.kind !== SyntaxKind.FunctionExpression) {
+                return undefined;
+            }
+
+            if (node.name.kind !== SyntaxKind.Identifier) {
+                return undefined;
+            }
+
+            const memberElements = createClassElementsFromSymbol(initializer.symbol);
+            if (initializer.body) {
+                memberElements.unshift(createConstructor(/*decorators*/ undefined, /*modifiers*/ undefined, initializer.parameters, initializer.body));
+            }
+
+            return createClassDeclaration(/*decorators*/ undefined, /*modifiers*/ undefined, node.name,
+                /*typeParameters*/ undefined, /*heritageClauses*/ undefined, memberElements);
+        }
+
+        function createClassFromFunctionDeclaration(node: FunctionDeclaration): ClassDeclaration {
+            const memberElements = createClassElementsFromSymbol(ctorSymbol);
+            if (node.body) {
+                memberElements.unshift(createConstructor(/*decorators*/ undefined, /*modifiers*/ undefined, node.parameters, node.body));
+            }
+            return createClassDeclaration(/*decorators*/ undefined, /*modifiers*/ undefined, node.name,
+                /*typeParameters*/ undefined, /*heritageClauses*/ undefined, memberElements);
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/services/refactors/refactors.ts b/src/services/refactors/refactors.ts
new file mode 100644
index 0000000..4c4ecb3
--- /dev/null
+++ b/src/services/refactors/refactors.ts
@@ -0,0 +1 @@
+/// <reference path="convertFunctionToEs6Class.ts" />
diff --git a/src/services/rename.ts b/src/services/rename.ts
index 6f28e50..6091c0b 100644
--- a/src/services/rename.ts
+++ b/src/services/rename.ts
@@ -1,98 +1,97 @@
 /* @internal */
 namespace ts.Rename {
     export function getRenameInfo(typeChecker: TypeChecker, defaultLibFileName: string, getCanonicalFileName: (fileName: string) => string, sourceFile: SourceFile, position: number): RenameInfo {
-        const canonicalDefaultLibName = getCanonicalFileName(ts.normalizePath(defaultLibFileName));
-
+        const getCanonicalDefaultLibName = memoize(() => getCanonicalFileName(ts.normalizePath(defaultLibFileName)));
         const node = getTouchingWord(sourceFile, position, /*includeJsDocComment*/ true);
+        const renameInfo = node && nodeIsEligibleForRename(node)
+            ? getRenameInfoForNode(node, typeChecker, sourceFile, isDefinedInLibraryFile)
+            : undefined;
+        return renameInfo || getRenameInfoError(Diagnostics.You_cannot_rename_this_element);
+
+        function isDefinedInLibraryFile(declaration: Node) {
+            if (!defaultLibFileName) {
+                return false;
+            }
 
-        if (node) {
-            if (node.kind === SyntaxKind.Identifier ||
-                node.kind === SyntaxKind.StringLiteral ||
-                isLiteralNameOfPropertyDeclarationOrIndexAccess(node) ||
-                isThis(node)) {
-                const symbol = typeChecker.getSymbolAtLocation(node);
+            const sourceFile = declaration.getSourceFile();
+            const canonicalName = getCanonicalFileName(ts.normalizePath(sourceFile.fileName));
+            return canonicalName === getCanonicalDefaultLibName();
+        }
+    }
 
-                // Only allow a symbol to be renamed if it actually has at least one declaration.
-                if (symbol) {
-                    const declarations = symbol.getDeclarations();
-                    if (declarations && declarations.length > 0) {
-                        // Disallow rename for elements that are defined in the standard TypeScript library.
-                        if (forEach(declarations, isDefinedInLibraryFile)) {
-                            return getRenameInfoError(getLocaleSpecificMessage(Diagnostics.You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library));
-                        }
+    function getRenameInfoForNode(node: Node, typeChecker: TypeChecker, sourceFile: SourceFile, isDefinedInLibraryFile: (declaration: Node) => boolean): RenameInfo | undefined {
+        const symbol = typeChecker.getSymbolAtLocation(node);
 
-                        const displayName = stripQuotes(getDeclaredName(typeChecker, symbol, node));
-                        const kind = SymbolDisplay.getSymbolKind(typeChecker, symbol, node);
-                        if (kind) {
-                            return {
-                                canRename: true,
-                                kind,
-                                displayName,
-                                localizedErrorMessage: undefined,
-                                fullDisplayName: typeChecker.getFullyQualifiedName(symbol),
-                                kindModifiers: SymbolDisplay.getSymbolModifiers(symbol),
-                                triggerSpan: createTriggerSpanForNode(node, sourceFile)
-                            };
-                        }
-                    }
+        // Only allow a symbol to be renamed if it actually has at least one declaration.
+        if (symbol) {
+            const declarations = symbol.getDeclarations();
+            if (declarations && declarations.length > 0) {
+                // Disallow rename for elements that are defined in the standard TypeScript library.
+                if (some(declarations, isDefinedInLibraryFile)) {
+                    return getRenameInfoError(Diagnostics.You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library);
                 }
-                else if (node.kind === SyntaxKind.StringLiteral) {
-                    const type = getStringLiteralTypeForNode(<StringLiteral>node, typeChecker);
-                    if (type) {
-                        if (isDefinedInLibraryFile(node)) {
-                            return getRenameInfoError(getLocaleSpecificMessage(Diagnostics.You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library));
-                        }
-                        else {
-                            const displayName = stripQuotes(type.text);
-                            return {
-                                canRename: true,
-                                kind: ScriptElementKind.variableElement,
-                                displayName,
-                                localizedErrorMessage: undefined,
-                                fullDisplayName: displayName,
-                                kindModifiers: ScriptElementKindModifier.none,
-                                triggerSpan: createTriggerSpanForNode(node, sourceFile)
-                            };
-                        }
-                    }
+
+                // Cannot rename `default` as in `import { default as foo } from "./someModule";
+                if (node.kind === SyntaxKind.Identifier &&
+                        (node as Identifier).originalKeywordKind === SyntaxKind.DefaultKeyword &&
+                        symbol.parent.flags & ts.SymbolFlags.Module) {
+                    return undefined;
                 }
+
+                const displayName = stripQuotes(getDeclaredName(typeChecker, symbol, node));
+                const kind = SymbolDisplay.getSymbolKind(typeChecker, symbol, node);
+                return kind ? getRenameInfoSuccess(displayName, typeChecker.getFullyQualifiedName(symbol), kind, SymbolDisplay.getSymbolModifiers(symbol), node, sourceFile) : undefined;
             }
         }
+        else if (node.kind === SyntaxKind.StringLiteral) {
+            if (isDefinedInLibraryFile(node)) {
+                return getRenameInfoError(Diagnostics.You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library);
+            }
 
-        return getRenameInfoError(getLocaleSpecificMessage(Diagnostics.You_cannot_rename_this_element));
-
-        function getRenameInfoError(localizedErrorMessage: string): RenameInfo {
-            return {
-                canRename: false,
-                localizedErrorMessage: localizedErrorMessage,
-                displayName: undefined,
-                fullDisplayName: undefined,
-                kind: undefined,
-                kindModifiers: undefined,
-                triggerSpan: undefined
-            };
+            const displayName = stripQuotes((node as StringLiteral).text);
+            return getRenameInfoSuccess(displayName, displayName, ScriptElementKind.variableElement, ScriptElementKindModifier.none, node, sourceFile);
         }
+    }
 
-        function isDefinedInLibraryFile(declaration: Node) {
-            if (defaultLibFileName) {
-                const sourceFile = declaration.getSourceFile();
-                const canonicalName = getCanonicalFileName(ts.normalizePath(sourceFile.fileName));
-                if (canonicalName === canonicalDefaultLibName) {
-                    return true;
-                }
-            }
-            return false;
-        }
+    function getRenameInfoSuccess(displayName: string, fullDisplayName: string, kind: ScriptElementKind, kindModifiers: string, node: Node, sourceFile: SourceFile): RenameInfo {
+        return {
+            canRename: true,
+            kind,
+            displayName,
+            localizedErrorMessage: undefined,
+            fullDisplayName,
+            kindModifiers,
+            triggerSpan: createTriggerSpanForNode(node, sourceFile)
+        };
+    }
 
-        function createTriggerSpanForNode(node: Node, sourceFile: SourceFile) {
-            let start = node.getStart(sourceFile);
-            let width = node.getWidth(sourceFile);
-            if (node.kind === SyntaxKind.StringLiteral) {
-                // Exclude the quotes
-                start += 1;
-                width -= 2;
-            }
-            return createTextSpan(start, width);
+    function getRenameInfoError(diagnostic: DiagnosticMessage): RenameInfo {
+        return {
+            canRename: false,
+            localizedErrorMessage: getLocaleSpecificMessage(diagnostic),
+            displayName: undefined,
+            fullDisplayName: undefined,
+            kind: undefined,
+            kindModifiers: undefined,
+            triggerSpan: undefined
+        };
+    }
+
+    function createTriggerSpanForNode(node: Node, sourceFile: SourceFile) {
+        let start = node.getStart(sourceFile);
+        let width = node.getWidth(sourceFile);
+        if (node.kind === SyntaxKind.StringLiteral) {
+            // Exclude the quotes
+            start += 1;
+            width -= 2;
         }
+        return createTextSpan(start, width);
+    }
+
+    function nodeIsEligibleForRename(node: Node): boolean {
+        return node.kind === ts.SyntaxKind.Identifier ||
+            node.kind === SyntaxKind.StringLiteral ||
+            isLiteralNameOfPropertyDeclarationOrIndexAccess(node) ||
+            isThis(node);
     }
 }
diff --git a/src/services/services.ts b/src/services/services.ts
index b50e1d3..b508285 100644
--- a/src/services/services.ts
+++ b/src/services/services.ts
@@ -10,7 +10,6 @@
 /// <reference path='documentRegistry.ts' />
 /// <reference path='findAllReferences.ts' />
 /// <reference path='goToDefinition.ts' />
-/// <reference path='goToImplementation.ts' />
 /// <reference path='jsDoc.ts' />
 /// <reference path='jsTyping.ts' />
 /// <reference path='navigateTo.ts' />
@@ -24,14 +23,22 @@
 /// <reference path='transpile.ts' />
 /// <reference path='formatting\formatting.ts' />
 /// <reference path='formatting\smartIndenter.ts' />
+/// <reference path='textChanges.ts' />
+/// <reference path='codeFixProvider.ts' />
+/// <reference path='refactorProvider.ts' />
+/// <reference path='codefixes\fixes.ts' />
+/// <reference path='refactors\refactors.ts' />
 
 namespace ts {
     /** The version of the language service API */
     export const servicesVersion = "0.5";
 
-    function createNode(kind: SyntaxKind, pos: number, end: number, parent?: Node): NodeObject | TokenObject | IdentifierObject {
-        const node = kind >= SyntaxKind.FirstNode ? new NodeObject(kind, pos, end) :
-            kind === SyntaxKind.Identifier ? new IdentifierObject(kind, pos, end) :
+    /* @internal */
+    let ruleProvider: formatting.RulesProvider;
+
+    function createNode<TKind extends SyntaxKind>(kind: TKind, pos: number, end: number, parent?: Node): NodeObject | TokenObject<TKind> | IdentifierObject {
+        const node = isNodeKind(kind) ? new NodeObject(kind, pos, end) :
+            kind === SyntaxKind.Identifier ? new IdentifierObject(SyntaxKind.Identifier, pos, end) :
                 new TokenObject(kind, pos, end);
         node.parent = parent;
         return node;
@@ -43,10 +50,9 @@ namespace ts {
         public end: number;
         public flags: NodeFlags;
         public parent: Node;
-        public jsDocComments: JSDoc[];
+        public jsDoc: JSDoc[];
         public original: Node;
         public transformFlags: TransformFlags;
-        public excludeTransformFlags: TransformFlags;
         private _children: Node[];
 
         constructor(kind: SyntaxKind, pos: number, end: number) {
@@ -54,7 +60,6 @@ namespace ts {
             this.end = end;
             this.flags = NodeFlags.None;
             this.transformFlags = undefined;
-            this.excludeTransformFlags = undefined;
             this.parent = undefined;
             this.kind = kind;
         }
@@ -63,7 +68,7 @@ namespace ts {
             return getSourceFileOfNode(this);
         }
 
-        public getStart(sourceFile?: SourceFile, includeJsDocComment?: boolean): number {
+        public getStart(sourceFile?: SourceFileLike, includeJsDocComment?: boolean): number {
             return getTokenPosOfNode(this, sourceFile, includeJsDocComment);
         }
 
@@ -98,10 +103,11 @@ namespace ts {
             return sourceFile.text.substring(this.getStart(sourceFile), this.getEnd());
         }
 
-        private addSyntheticNodes(nodes: Node[], pos: number, end: number, useJSDocScanner?: boolean): number {
+        private addSyntheticNodes(nodes: Node[], pos: number, end: number): number {
             scanner.setTextPos(pos);
             while (pos < end) {
-                const token = useJSDocScanner ? scanner.scanJSDocToken() : scanner.scan();
+                const token = scanner.scan();
+                Debug.assert(token !== SyntaxKind.EndOfFileToken); // Else it would infinitely loop
                 const textPos = scanner.getTextPos();
                 if (textPos <= end) {
                     nodes.push(createNode(token, pos, textPos, this));
@@ -129,47 +135,51 @@ namespace ts {
             return list;
         }
 
-        private createChildren(sourceFile?: SourceFile) {
-            let children: Node[];
-            if (this.kind >= SyntaxKind.FirstNode) {
-                scanner.setText((sourceFile || this.getSourceFile()).text);
-                children = [];
-                let pos = this.pos;
-                const useJSDocScanner = this.kind >= SyntaxKind.FirstJSDocTagNode && this.kind <= SyntaxKind.LastJSDocTagNode;
-                const processNode = (node: Node) => {
-                    const isJSDocTagNode = isJSDocTag(node);
-                    if (!isJSDocTagNode && pos < node.pos) {
-                        pos = this.addSyntheticNodes(children, pos, node.pos, useJSDocScanner);
-                    }
-                    children.push(node);
-                    if (!isJSDocTagNode) {
-                        pos = node.end;
-                    }
-                };
-                const processNodes = (nodes: NodeArray<Node>) => {
-                    if (pos < nodes.pos) {
-                        pos = this.addSyntheticNodes(children, pos, nodes.pos, useJSDocScanner);
-                    }
-                    children.push(this.createSyntaxList(<NodeArray<Node>>nodes));
-                    pos = nodes.end;
-                };
-                // jsDocComments need to be the first children
-                if (this.jsDocComments) {
-                    for (const jsDocComment of this.jsDocComments) {
-                        processNode(jsDocComment);
-                    }
+        private createChildren(sourceFile?: SourceFileLike) {
+            if (!isNodeKind(this.kind)) {
+                this._children = emptyArray;
+                return;
+            }
+
+            if (isJSDocCommentContainingNode(this)) {
+                /** Don't add trivia for "tokens" since this is in a comment. */
+                const children: Node[] = [];
+                this.forEachChild(child => { children.push(child); });
+                this._children = children;
+                return;
+            }
+
+            const children: Node[] = [];
+            scanner.setText((sourceFile || this.getSourceFile()).text);
+            let pos = this.pos;
+            const processNode = (node: Node) => {
+                pos = this.addSyntheticNodes(children, pos, node.pos);
+                children.push(node);
+                pos = node.end;
+            };
+            const processNodes = (nodes: NodeArray<Node>) => {
+                if (pos < nodes.pos) {
+                    pos = this.addSyntheticNodes(children, pos, nodes.pos);
                 }
-                // For syntactic classifications, all trivia are classcified together, including jsdoc comments.
-                // For that to work, the jsdoc comments should still be the leading trivia of the first child.
-                // Restoring the scanner position ensures that.
-                pos = this.pos;
-                forEachChild(this, processNode, processNodes);
-                if (pos < this.end) {
-                    this.addSyntheticNodes(children, pos, this.end);
+                children.push(this.createSyntaxList(nodes));
+                pos = nodes.end;
+            };
+            // jsDocComments need to be the first children
+            if (this.jsDoc) {
+                for (const jsDocComment of this.jsDoc) {
+                    processNode(jsDocComment);
                 }
-                scanner.setText(undefined);
             }
-            this._children = children || emptyArray;
+            // For syntactic classifications, all trivia are classcified together, including jsdoc comments.
+            // For that to work, the jsdoc comments should still be the leading trivia of the first child.
+            // Restoring the scanner position ensures that.
+            pos = this.pos;
+            forEachChild(this, processNode, processNodes);
+            if (pos < this.end) {
+                this.addSyntheticNodes(children, pos, this.end);
+            }
+            scanner.setText(undefined);
+            this._children = children;
         }
 
         public getChildCount(sourceFile?: SourceFile): number {
@@ -182,7 +192,7 @@ namespace ts {
             return this._children[index];
         }
 
-        public getChildren(sourceFile?: SourceFile): Node[] {
+        public getChildren(sourceFile?: SourceFileLike): Node[] {
             if (!this._children) this.createChildren(sourceFile);
             return this._children;
         }
@@ -193,9 +203,10 @@ namespace ts {
                 return undefined;
             }
 
-            const child = children[0];
-
-            return child.kind < SyntaxKind.FirstNode ? child : child.getFirstToken(sourceFile);
+            const child = ts.find(children, kid => kid.kind < SyntaxKind.FirstJSDocNode || kid.kind > SyntaxKind.LastJSDocNode);
+            return child.kind < SyntaxKind.FirstNode ?
+                child :
+                child.getFirstToken(sourceFile);
         }
 
         public getLastToken(sourceFile?: SourceFile): Node {
@@ -208,16 +219,19 @@ namespace ts {
 
             return child.kind < SyntaxKind.FirstNode ? child : child.getLastToken(sourceFile);
         }
+
+        public forEachChild<T>(cbNode: (node: Node) => T, cbNodeArray?: (nodes: NodeArray<Node>) => T): T {
+            return forEachChild(this, cbNode, cbNodeArray);
+        }
     }
 
-    class TokenOrIdentifierObject implements Token {
+    class TokenOrIdentifierObject implements Node {
         public kind: SyntaxKind;
         public pos: number;
         public end: number;
         public flags: NodeFlags;
         public parent: Node;
         public jsDocComments: JSDoc[];
-        public __tokenTag: any;
 
         constructor(pos: number, end: number) {
             // Set properties in same order as NodeObject
@@ -231,7 +245,7 @@ namespace ts {
             return getSourceFileOfNode(this);
         }
 
-        public getStart(sourceFile?: SourceFile, includeJsDocComment?: boolean): number {
+        public getStart(sourceFile?: SourceFileLike, includeJsDocComment?: boolean): number {
             return getTokenPosOfNode(this, sourceFile, includeJsDocComment);
         }
 
@@ -263,23 +277,27 @@ namespace ts {
             return (sourceFile || this.getSourceFile()).text.substring(this.getStart(), this.getEnd());
         }
 
-        public getChildCount(sourceFile?: SourceFile): number {
+        public getChildCount(): number {
             return 0;
         }
 
-        public getChildAt(index: number, sourceFile?: SourceFile): Node {
+        public getChildAt(): Node {
             return undefined;
         }
 
-        public getChildren(sourceFile?: SourceFile): Node[] {
+        public getChildren(): Node[] {
             return emptyArray;
         }
 
-        public getFirstToken(sourceFile?: SourceFile): Node {
+        public getFirstToken(): Node {
             return undefined;
         }
 
-        public getLastToken(sourceFile?: SourceFile): Node {
+        public getLastToken(): Node {
+            return undefined;
+        }
+
+        public forEachChild<T>(): T {
             return undefined;
         }
     }
@@ -287,11 +305,15 @@ namespace ts {
     class SymbolObject implements Symbol {
         flags: SymbolFlags;
         name: string;
-        declarations: Declaration[];
+        declarations?: Declaration[];
+
+        // Undefined is used to indicate the value has not been computed. If, after computing, the
+        // symbol has no doc comment, then the empty array will be returned.
+        documentationComment?: SymbolDisplayPart[];
 
         // Undefined is used to indicate the value has not been computed. If, after computing, the
-        // symbol has no doc comment, then the empty string will be returned.
-        documentationComment: SymbolDisplayPart[];
+        // symbol has no JSDoc tags, then the empty array will be returned.
+        tags?: JSDocTagInfo[];
 
         constructor(flags: SymbolFlags, name: string) {
             this.flags = flags;
@@ -306,29 +328,47 @@ namespace ts {
             return this.name;
         }
 
-        getDeclarations(): Declaration[] {
+        getDeclarations(): Declaration[] | undefined {
             return this.declarations;
         }
 
         getDocumentationComment(): SymbolDisplayPart[] {
             if (this.documentationComment === undefined) {
-                this.documentationComment = JsDoc.getJsDocCommentsFromDeclarations(this.declarations, this.name, !(this.flags & SymbolFlags.Property));
+                this.documentationComment = JsDoc.getJsDocCommentsFromDeclarations(this.declarations);
             }
 
             return this.documentationComment;
         }
+
+        getJsDocTags(): JSDocTagInfo[] {
+            if (this.tags === undefined) {
+                this.tags = JsDoc.getJsDocTagsFromDeclarations(this.declarations);
+            }
+
+            return this.tags;
+        }
     }
 
-    class TokenObject extends TokenOrIdentifierObject {
-        public kind: SyntaxKind;
-        constructor(kind: SyntaxKind, pos: number, end: number) {
+    class TokenObject<TKind extends SyntaxKind> extends TokenOrIdentifierObject implements Token<TKind> {
+        public kind: TKind;
+
+        constructor(kind: TKind, pos: number, end: number) {
             super(pos, end);
             this.kind = kind;
         }
     }
 
-    class IdentifierObject extends TokenOrIdentifierObject {
-        constructor(kind: SyntaxKind, pos: number, end: number) {
+    class IdentifierObject extends TokenOrIdentifierObject implements Identifier {
+        public kind: SyntaxKind.Identifier;
+        public text: string;
+        _primaryExpressionBrand: any;
+        _memberExpressionBrand: any;
+        _leftHandSideExpressionBrand: any;
+        _updateExpressionBrand: any;
+        _unaryExpressionBrand: any;
+        _expressionBrand: any;
+        /*@internal*/typeArguments: NodeArray<TypeNode>;
+        constructor(_kind: SyntaxKind.Identifier, pos: number, end: number) {
             super(pos, end);
         }
     }
@@ -337,8 +377,9 @@ namespace ts {
     class TypeObject implements Type {
         checker: TypeChecker;
         flags: TypeFlags;
+        objectFlags?: ObjectFlags;
         id: number;
-        symbol: Symbol;
+        symbol?: Symbol;
         constructor(checker: TypeChecker, flags: TypeFlags) {
             this.checker = checker;
             this.flags = flags;
@@ -346,13 +387,13 @@ namespace ts {
         getFlags(): TypeFlags {
             return this.flags;
         }
-        getSymbol(): Symbol {
+        getSymbol(): Symbol | undefined {
             return this.symbol;
         }
         getProperties(): Symbol[] {
             return this.checker.getPropertiesOfType(this);
         }
-        getProperty(propertyName: string): Symbol {
+        getProperty(propertyName: string): Symbol | undefined {
             return this.checker.getPropertyOfType(this, propertyName);
         }
         getApparentProperties(): Symbol[] {
@@ -364,14 +405,14 @@ namespace ts {
         getConstructSignatures(): Signature[] {
             return this.checker.getSignaturesOfType(this, SignatureKind.Construct);
         }
-        getStringIndexType(): Type {
+        getStringIndexType(): Type | undefined {
             return this.checker.getIndexTypeOfType(this, IndexKind.String);
         }
-        getNumberIndexType(): Type {
+        getNumberIndexType(): Type | undefined {
             return this.checker.getIndexTypeOfType(this, IndexKind.Number);
         }
-        getBaseTypes(): ObjectType[] {
-            return this.flags & (TypeFlags.Class | TypeFlags.Interface)
+        getBaseTypes(): BaseType[] | undefined {
+            return this.flags & TypeFlags.Object && this.objectFlags & (ObjectFlags.Class | ObjectFlags.Interface)
                 ? this.checker.getBaseTypes(<InterfaceType><Type>this)
                 : undefined;
         }
@@ -383,17 +424,22 @@ namespace ts {
     class SignatureObject implements Signature {
         checker: TypeChecker;
         declaration: SignatureDeclaration;
-        typeParameters: TypeParameter[];
+        typeParameters?: TypeParameter[];
         parameters: Symbol[];
         thisParameter: Symbol;
         resolvedReturnType: Type;
+        minTypeArgumentCount: number;
         minArgumentCount: number;
         hasRestParameter: boolean;
         hasLiteralTypes: boolean;
 
         // Undefined is used to indicate the value has not been computed. If, after computing, the
-        // symbol has no doc comment, then the empty string will be returned.
-        documentationComment: SymbolDisplayPart[];
+        // symbol has no doc comment, then the empty array will be returned.
+        documentationComment?: SymbolDisplayPart[];
+
+        // Undefined is used to indicate the value has not been computed. If, after computing, the
+        // symbol has no doc comment, then the empty array will be returned.
+        jsDocTags?: JSDocTagInfo[];
 
         constructor(checker: TypeChecker) {
             this.checker = checker;
@@ -401,7 +447,7 @@ namespace ts {
         getDeclaration(): SignatureDeclaration {
             return this.declaration;
         }
-        getTypeParameters(): Type[] {
+        getTypeParameters(): TypeParameter[] | undefined {
             return this.typeParameters;
         }
         getParameters(): Symbol[] {
@@ -413,17 +459,23 @@ namespace ts {
 
         getDocumentationComment(): SymbolDisplayPart[] {
             if (this.documentationComment === undefined) {
-                this.documentationComment = this.declaration ? JsDoc.getJsDocCommentsFromDeclarations(
-                    [this.declaration],
-                    /*name*/ undefined,
-                    /*canUseParsedParamTagComments*/ false) : [];
+                this.documentationComment = this.declaration ? JsDoc.getJsDocCommentsFromDeclarations([this.declaration]) : [];
             }
 
             return this.documentationComment;
         }
+
+        getJsDocTags(): JSDocTagInfo[] {
+            if (this.jsDocTags === undefined) {
+                this.jsDocTags = this.declaration ? JsDoc.getJsDocTagsFromDeclarations([this.declaration]) : [];
+            }
+
+            return this.jsDocTags;
+        }
     }
 
     class SourceFileObject extends NodeObject implements SourceFile {
+        public kind: SyntaxKind.SourceFile;
         public _declarationBrand: any;
         public fileName: string;
         public path: Path;
@@ -432,7 +484,7 @@ namespace ts {
         public lineMap: number[];
 
         public statements: NodeArray<Statement>;
-        public endOfFileToken: Node;
+        public endOfFileToken: Token<SyntaxKind.EndOfFileToken>;
 
         public amdDependencies: { name: string; path: string }[];
         public moduleName: string;
@@ -458,11 +510,14 @@ namespace ts {
         public languageVariant: LanguageVariant;
         public identifiers: Map<string>;
         public nameTable: Map<number>;
-        public resolvedModules: Map<ResolvedModule>;
+        public resolvedModules: Map<ResolvedModuleFull>;
         public resolvedTypeReferenceDirectiveNames: Map<ResolvedTypeReferenceDirective>;
-        public imports: LiteralExpression[];
-        public moduleAugmentations: LiteralExpression[];
+        public imports: StringLiteral[];
+        public moduleAugmentations: StringLiteral[];
         private namedDeclarations: Map<Declaration[]>;
+        public ambientModuleNames: string[];
+        public checkJsDirective: CheckJsDirective | undefined;
+        public possiblyContainDynamicImport: boolean;
 
         constructor(kind: SyntaxKind, pos: number, end: number) {
             super(kind, pos, end);
@@ -484,6 +539,23 @@ namespace ts {
             return ts.getPositionOfLineAndCharacter(this, line, character);
         }
 
+        public getLineEndOfPosition(pos: number): number {
+            const { line } = this.getLineAndCharacterOfPosition(pos);
+            const lineStarts = this.getLineStarts();
+
+            let lastCharPos: number;
+            if (line + 1 >= lineStarts.length) {
+                lastCharPos = this.getEnd();
+            }
+            if (!lastCharPos) {
+                lastCharPos = lineStarts[line + 1] - 1;
+            }
+
+            const fullText = this.getFullText();
+            // if the new line is "\r\n", we should return the last non-new-line-character position
+            return fullText[lastCharPos] === "\n" && fullText[lastCharPos - 1] === "\r" ? lastCharPos - 1 : lastCharPos;
+        }
+
         public getNamedDeclarations(): Map<Declaration[]> {
             if (!this.namedDeclarations) {
                 this.namedDeclarations = this.computeNamedDeclarations();
@@ -493,7 +565,7 @@ namespace ts {
         }
 
         private computeNamedDeclarations(): Map<Declaration[]> {
-            const result = createMap<Declaration[]>();
+            const result = createMultiMap<Declaration>();
 
             forEachChild(this, visit);
 
@@ -502,23 +574,28 @@ namespace ts {
             function addDeclaration(declaration: Declaration) {
                 const name = getDeclarationName(declaration);
                 if (name) {
-                    multiMapAdd(result, name, declaration);
+                    result.add(name, declaration);
                 }
             }
 
             function getDeclarations(name: string) {
-                return result[name] || (result[name] = []);
+                let declarations = result.get(name);
+                if (!declarations) {
+                    result.set(name, declarations = []);
+                }
+                return declarations;
             }
 
             function getDeclarationName(declaration: Declaration) {
-                if (declaration.name) {
-                    const result = getTextOfIdentifierOrLiteral(declaration.name);
+                const name = getNameOfDeclaration(declaration);
+                if (name) {
+                    const result = getTextOfIdentifierOrLiteral(name);
                     if (result !== undefined) {
                         return result;
                     }
 
-                    if (declaration.name.kind === SyntaxKind.ComputedPropertyName) {
-                        const expr = (<ComputedPropertyName>declaration.name).expression;
+                    if (name.kind === SyntaxKind.ComputedPropertyName) {
+                        const expr = (<ComputedPropertyName>name).expression;
                         if (expr.kind === SyntaxKind.PropertyAccessExpression) {
                             return (<PropertyAccessExpression>expr).name.text;
                         }
@@ -567,9 +644,8 @@ namespace ts {
                             else {
                                 declarations.push(functionDeclaration);
                             }
-
-                            forEachChild(node, visit);
                         }
+                        forEachChild(node, visit);
                         break;
 
                     case SyntaxKind.ClassDeclaration:
@@ -596,7 +672,7 @@ namespace ts {
                         if (!hasModifier(node, ModifierFlags.ParameterPropertyModifier)) {
                             break;
                         }
-                    // fall through
+                        // falls through
                     case SyntaxKind.VariableDeclaration:
                     case SyntaxKind.BindingElement: {
                         const decl = <VariableDeclaration>node;
@@ -604,9 +680,11 @@ namespace ts {
                             forEachChild(decl.name, visit);
                             break;
                         }
-                        if (decl.initializer)
+                        if (decl.initializer) {
                             visit(decl.initializer);
+                        }
                     }
+                        // falls through
                     case SyntaxKind.EnumMember:
                     case SyntaxKind.PropertyDeclaration:
                     case SyntaxKind.PropertySignature:
@@ -651,15 +729,26 @@ namespace ts {
         }
     }
 
+    class SourceMapSourceObject implements SourceMapSource {
+        lineMap: number[];
+        constructor (public fileName: string, public text: string, public skipTrivia?: (pos: number) => number) {}
+
+        public getLineAndCharacterOfPosition(pos: number): LineAndCharacter {
+            return ts.getLineAndCharacterOfPosition(this, pos);
+        }
+    }
+
     function getServicesObjectAllocator(): ObjectAllocator {
         return {
             getNodeConstructor: () => NodeObject,
             getTokenConstructor: () => TokenObject,
+
             getIdentifierConstructor: () => IdentifierObject,
             getSourceFileConstructor: () => SourceFileObject,
             getSymbolConstructor: () => SymbolObject,
             getTypeConstructor: () => TypeObject,
             getSignatureConstructor: () => SignatureObject,
+            getSourceMapSourceConstructor: () => SourceMapSourceObject,
         };
     }
 
@@ -721,15 +810,19 @@ namespace ts {
         };
     }
 
-    // Cache host information about script should be refreshed
+    export function getSupportedCodeFixes() {
+        return codefix.getSupportedErrorCodes();
+    }
+
+    // Cache host information about script Should be refreshed
     // at each language service public entry point, since we don't know when
-    // set of scripts handled by the host changes.
+    // the set of scripts handled by the host changes.
     class HostCache {
         private fileNameToEntry: FileMap<HostFileInformation>;
         private _compilationSettings: CompilerOptions;
         private currentDirectory: string;
 
-        constructor(private host: LanguageServiceHost, private getCanonicalFileName: (fileName: string) => string) {
+        constructor(private host: LanguageServiceHost, getCanonicalFileName: (fileName: string) => string) {
             // script id => script index
             this.currentDirectory = host.getCurrentDirectory();
             this.fileNameToEntry = createFileMap<HostFileInformation>();
@@ -764,29 +857,24 @@ namespace ts {
             return entry;
         }
 
-        private getEntry(path: Path): HostFileInformation {
+        public getEntryByPath(path: Path): HostFileInformation {
             return this.fileNameToEntry.get(path);
         }
 
-        private contains(path: Path): boolean {
+        public containsEntryByPath(path: Path): boolean {
             return this.fileNameToEntry.contains(path);
         }
 
-        public getOrCreateEntry(fileName: string): HostFileInformation {
-            const path = toPath(fileName, this.currentDirectory, this.getCanonicalFileName);
-            return this.getOrCreateEntryByPath(fileName, path);
-        }
-
         public getOrCreateEntryByPath(fileName: string, path: Path): HostFileInformation {
-            return this.contains(path)
-                ? this.getEntry(path)
+            return this.containsEntryByPath(path)
+                ? this.getEntryByPath(path)
                 : this.createEntry(fileName, path);
         }
 
         public getRootFileNames(): string[] {
             const fileNames: string[] = [];
 
-            this.fileNameToEntry.forEachValue((path, value) => {
+            this.fileNameToEntry.forEachValue((_path, value) => {
                 if (value) {
                     fileNames.push(value.hostFileName);
                 }
@@ -796,12 +884,12 @@ namespace ts {
         }
 
         public getVersion(path: Path): string {
-            const file = this.getEntry(path);
+            const file = this.getEntryByPath(path);
             return file && file.version;
         }
 
         public getScriptSnapshot(path: Path): IScriptSnapshot {
-            const file = this.getEntry(path);
+            const file = this.getEntryByPath(path);
             return file && file.scriptSnapshot;
         }
     }
@@ -937,14 +1025,43 @@ namespace ts {
         }
     }
 
+    /* @internal */
+    /** A cancellation that throttles calls to the host */
+    export class ThrottledCancellationToken implements CancellationToken {
+        // Store when we last tried to cancel.  Checking cancellation can be expensive (as we have
+        // to marshall over to the host layer).  So we only bother actually checking once enough
+        // time has passed.
+        private lastCancellationCheckTime = 0;
+
+        constructor(private hostCancellationToken: HostCancellationToken, private readonly throttleWaitMilliseconds = 20) {
+        }
+
+        public isCancellationRequested(): boolean {
+            const time = timestamp();
+            const duration = Math.abs(time - this.lastCancellationCheckTime);
+            if (duration >= this.throttleWaitMilliseconds) {
+                // Check no more than once every throttle wait milliseconds
+                this.lastCancellationCheckTime = time;
+                return this.hostCancellationToken.isCancellationRequested();
+            }
+
+            return false;
+        }
+
+        public throwIfCancellationRequested(): void {
+            if (this.isCancellationRequested()) {
+                throw new OperationCanceledException();
+            }
+        }
+    }
+
     export function createLanguageService(host: LanguageServiceHost,
         documentRegistry: DocumentRegistry = createDocumentRegistry(host.useCaseSensitiveFileNames && host.useCaseSensitiveFileNames(), host.getCurrentDirectory())): LanguageService {
 
         const syntaxTreeCache: SyntaxTreeCache = new SyntaxTreeCache(host);
-        let ruleProvider: formatting.RulesProvider;
+        ruleProvider = ruleProvider || new formatting.RulesProvider();
         let program: Program;
         let lastProjectVersion: string;
-
         let lastTypesRootVersion = 0;
 
         const useCaseSensitivefileNames = host.useCaseSensitiveFileNames && host.useCaseSensitiveFileNames();
@@ -973,11 +1090,6 @@ namespace ts {
         }
 
         function getRuleProvider(options: FormatCodeSettings) {
-            // Ensure rules are initialized and up to date wrt to formatting options
-            if (!ruleProvider) {
-                ruleProvider = new formatting.RulesProvider();
-            }
-
             ruleProvider.ensureUpToDate(options);
             return ruleProvider;
         }
@@ -1038,16 +1150,23 @@ namespace ts {
                 useCaseSensitiveFileNames: () => useCaseSensitivefileNames,
                 getNewLine: () => getNewLineOrDefaultFromHost(host),
                 getDefaultLibFileName: (options) => host.getDefaultLibFileName(options),
-                writeFile: (fileName, data, writeByteOrderMark) => { },
+                writeFile: noop,
                 getCurrentDirectory: () => currentDirectory,
                 fileExists: (fileName): boolean => {
                     // stub missing host functionality
-                    return hostCache.getOrCreateEntry(fileName) !== undefined;
+                    const path = toPath(fileName, currentDirectory, getCanonicalFileName);
+                    return hostCache.containsEntryByPath(path) ?
+                        !!hostCache.getEntryByPath(path) :
+                        (host.fileExists && host.fileExists(fileName));
                 },
                 readFile: (fileName): string => {
                     // stub missing host functionality
-                    const entry = hostCache.getOrCreateEntry(fileName);
-                    return entry && entry.scriptSnapshot.getText(0, entry.scriptSnapshot.getLength());
+                    const path = toPath(fileName, currentDirectory, getCanonicalFileName);
+                    if (hostCache.containsEntryByPath(path)) {
+                        const entry = hostCache.getEntryByPath(path);
+                        return entry && entry.scriptSnapshot.getText(0, entry.scriptSnapshot.getLength());
+                    }
+                    return host.readFile && host.readFile(fileName);
                 },
                 directoryExists: directoryName => {
                     return directoryProbablyExists(directoryName, host);
@@ -1180,8 +1299,20 @@ namespace ts {
                     }
                 }
 
+                const currentOptions = program.getCompilerOptions();
+                const newOptions = hostCache.compilationSettings();
                 // If the compilation settings do no match, then the program is not up-to-date
-                return compareDataObjects(program.getCompilerOptions(), hostCache.compilationSettings());
+                if (!compareDataObjects(currentOptions, newOptions)) {
+                    return false;
+                }
+
+                // If everything matches but the text of config file is changed,
+                // error locations can change for program options, so update the program
+                if (currentOptions.configFile && newOptions.configFile) {
+                    return currentOptions.configFile.text === newOptions.configFile.text;
+                }
+
+                return true;
             }
         }
 
@@ -1192,14 +1323,16 @@ namespace ts {
         }
 
         function cleanupSemanticCache(): void {
-            // TODO: Should we jettison the program (or it's type checker) here?
+            program = undefined;
         }
 
         function dispose(): void {
             if (program) {
                 forEach(program.getSourceFiles(), f =>
                     documentRegistry.releaseDocument(f.fileName, program.getCompilerOptions()));
+                program = undefined;
             }
+            host = undefined;
         }
 
         /// Diagnostics
@@ -1256,7 +1389,7 @@ namespace ts {
             synchronizeHostData();
 
             const sourceFile = getValidSourceFile(fileName);
-            const node = getTouchingPropertyName(sourceFile, position);
+            const node = getTouchingPropertyName(sourceFile, position, /*includeJsDocComment*/ true);
             if (node === sourceFile) {
                 return undefined;
             }
@@ -1285,7 +1418,8 @@ namespace ts {
                                 kindModifiers: ScriptElementKindModifier.none,
                                 textSpan: createTextSpan(node.getStart(), node.getWidth()),
                                 displayParts: typeToDisplayParts(typeChecker, type, getContainerNode(node)),
-                                documentation: type.symbol ? type.symbol.getDocumentationComment() : undefined
+                                documentation: type.symbol ? type.symbol.getDocumentationComment() : undefined,
+                                tags: type.symbol ? type.symbol.getJsDocTags() : undefined
                             };
                         }
                 }
@@ -1299,7 +1433,8 @@ namespace ts {
                 kindModifiers: SymbolDisplay.getSymbolModifiers(symbol),
                 textSpan: createTextSpan(node.getStart(), node.getWidth()),
                 displayParts: displayPartsDocumentationsAndKind.displayParts,
-                documentation: displayPartsDocumentationsAndKind.documentation
+                documentation: displayPartsDocumentationsAndKind.documentation,
+                tags: displayPartsDocumentationsAndKind.tags
             };
         }
 
@@ -1309,18 +1444,18 @@ namespace ts {
             return GoToDefinition.getDefinitionAtPosition(program, getValidSourceFile(fileName), position);
         }
 
-        /// Goto implementation
-        function getImplementationAtPosition(fileName: string, position: number): ImplementationLocation[] {
+        function getTypeDefinitionAtPosition(fileName: string, position: number): DefinitionInfo[] {
             synchronizeHostData();
-            return GoToImplementation.getImplementationAtPosition(program.getTypeChecker(), cancellationToken,
-                program.getSourceFiles(), getTouchingPropertyName(getValidSourceFile(fileName), position));
+            return GoToDefinition.getTypeDefinitionAtPosition(program.getTypeChecker(), getValidSourceFile(fileName), position);
         }
 
-        function getTypeDefinitionAtPosition(fileName: string, position: number): DefinitionInfo[] {
+        /// Goto implementation
+        function getImplementationAtPosition(fileName: string, position: number): ImplementationLocation[] {
             synchronizeHostData();
-            return GoToDefinition.getTypeDefinitionAtPosition(program.getTypeChecker(), getValidSourceFile(fileName), position);
+            return FindAllReferences.getImplementationsAtPosition(program, cancellationToken, program.getSourceFiles(), getValidSourceFile(fileName), position);
         }
 
+        /// References and Occurrences
         function getOccurrencesAtPosition(fileName: string, position: number): ReferenceEntry[] {
             let results = getOccurrencesAtPositionCore(fileName, position);
 
@@ -1339,13 +1474,10 @@ namespace ts {
             synchronizeHostData();
             const sourceFilesToSearch = map(filesToSearch, f => program.getSourceFile(f));
             const sourceFile = getValidSourceFile(fileName);
-            return DocumentHighlights.getDocumentHighlights(program.getTypeChecker(), cancellationToken, sourceFile, position, sourceFilesToSearch);
+            return DocumentHighlights.getDocumentHighlights(program, cancellationToken, sourceFile, position, sourceFilesToSearch);
         }
 
-        /// References and Occurrences
         function getOccurrencesAtPositionCore(fileName: string, position: number): ReferenceEntry[] {
-            synchronizeHostData();
-
             return convertDocumentHighlights(getDocumentHighlights(fileName, position, [fileName]));
 
             function convertDocumentHighlights(documentHighlights: DocumentHighlights[]): ReferenceEntry[] {
@@ -1360,7 +1492,8 @@ namespace ts {
                             fileName: entry.fileName,
                             textSpan: highlightSpan.textSpan,
                             isWriteAccess: highlightSpan.kind === HighlightSpanKind.writtenReference,
-                            isDefinition: false
+                            isDefinition: false,
+                            isInString: highlightSpan.isInString,
                         });
                     }
                 }
@@ -1370,25 +1503,21 @@ namespace ts {
         }
 
         function findRenameLocations(fileName: string, position: number, findInStrings: boolean, findInComments: boolean): RenameLocation[] {
-            const referencedSymbols = findReferencedSymbols(fileName, position, findInStrings, findInComments);
-            return FindAllReferences.convertReferences(referencedSymbols);
+            return getReferences(fileName, position, { findInStrings, findInComments, isForRename: true });
         }
 
         function getReferencesAtPosition(fileName: string, position: number): ReferenceEntry[] {
-            const referencedSymbols = findReferencedSymbols(fileName, position, /*findInStrings*/ false, /*findInComments*/ false);
-            return FindAllReferences.convertReferences(referencedSymbols);
+            return getReferences(fileName, position);
         }
 
-        function findReferences(fileName: string, position: number): ReferencedSymbol[] {
-            const referencedSymbols = findReferencedSymbols(fileName, position, /*findInStrings*/ false, /*findInComments*/ false);
-
-            // Only include referenced symbols that have a valid definition.
-            return filter(referencedSymbols, rs => !!rs.definition);
+        function getReferences(fileName: string, position: number, options?: FindAllReferences.Options) {
+            synchronizeHostData();
+            return FindAllReferences.findReferencedEntries(program, cancellationToken, program.getSourceFiles(), getValidSourceFile(fileName), position, options);
         }
 
-        function findReferencedSymbols(fileName: string, position: number, findInStrings: boolean, findInComments: boolean): ReferencedSymbol[] {
+        function findReferences(fileName: string, position: number): ReferencedSymbol[] {
             synchronizeHostData();
-            return FindAllReferences.findReferencedSymbols(program.getTypeChecker(), cancellationToken, program.getSourceFiles(), getValidSourceFile(fileName), position, findInStrings, findInComments);
+            return FindAllReferences.findReferencedSymbols(program, cancellationToken, program.getSourceFiles(), getValidSourceFile(fileName), position);
         }
 
         /// NavigateTo
@@ -1413,7 +1542,8 @@ namespace ts {
                 });
             }
 
-            const emitOutput = program.emit(sourceFile, writeFile, cancellationToken, emitOnlyDtsFiles);
+            const customTransformers = host.getCustomTransformers && host.getCustomTransformers();
+            const emitOutput = program.emit(sourceFile, writeFile, cancellationToken, emitOnlyDtsFiles, customTransformers);
 
             return {
                 outputFiles,
@@ -1442,11 +1572,11 @@ namespace ts {
             return getNonBoundSourceFile(fileName);
         }
 
-        function getNameOrDottedNameSpan(fileName: string, startPos: number, endPos: number): TextSpan {
+        function getNameOrDottedNameSpan(fileName: string, startPos: number, _endPos: number): TextSpan {
             const sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
 
             // Get node at the location
-            const node = getTouchingPropertyName(sourceFile, startPos);
+            const node = getTouchingPropertyName(sourceFile, startPos, /*includeJsDocComment*/ false);
 
             if (node === sourceFile) {
                 return;
@@ -1507,17 +1637,32 @@ namespace ts {
         }
 
         function getNavigationBarItems(fileName: string): NavigationBarItem[] {
-            const sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
+            return NavigationBar.getNavigationBarItems(syntaxTreeCache.getCurrentSourceFile(fileName), cancellationToken);
+        }
+
+        function getNavigationTree(fileName: string): NavigationTree {
+            return NavigationBar.getNavigationTree(syntaxTreeCache.getCurrentSourceFile(fileName), cancellationToken);
+        }
 
-            return NavigationBar.getNavigationBarItems(sourceFile);
+        function isTsOrTsxFile(fileName: string): boolean {
+            const kind = getScriptKind(fileName, host);
+            return kind === ScriptKind.TS || kind === ScriptKind.TSX;
         }
 
         function getSemanticClassifications(fileName: string, span: TextSpan): ClassifiedSpan[] {
+            if (!isTsOrTsxFile(fileName)) {
+                // do not run semantic classification on non-ts-or-tsx files
+                return [];
+            }
             synchronizeHostData();
             return ts.getSemanticClassifications(program.getTypeChecker(), cancellationToken, getValidSourceFile(fileName), program.getClassifiableNames(), span);
         }
 
         function getEncodedSemanticClassifications(fileName: string, span: TextSpan): Classifications {
+            if (!isTsOrTsxFile(fileName)) {
+                // do not run semantic classification on non-ts-or-tsx files
+                return { spans: [], endOfLineState: EndOfLineState.None };
+            }
             synchronizeHostData();
             return ts.getEncodedSemanticClassifications(program.getTypeChecker(), cancellationToken, getValidSourceFile(fileName), program.getClassifiableNames(), span);
         }
@@ -1535,14 +1680,14 @@ namespace ts {
         function getOutliningSpans(fileName: string): OutliningSpan[] {
             // doesn't use compiler - no need to synchronize with host
             const sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            return OutliningElementsCollector.collectElements(sourceFile);
+            return OutliningElementsCollector.collectElements(sourceFile, cancellationToken);
         }
 
         function getBraceMatchingAtPosition(fileName: string, position: number) {
             const sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
             const result: TextSpan[] = [];
 
-            const token = getTouchingToken(sourceFile, position);
+            const token = getTouchingToken(sourceFile, position, /*includeJsDocComment*/ false);
 
             if (token.getStart(sourceFile) === position) {
                 const matchKind = getMatchingTokenKind(token);
@@ -1632,6 +1777,37 @@ namespace ts {
             return [];
         }
 
+        function getCodeFixesAtPosition(fileName: string, start: number, end: number, errorCodes: number[], formatOptions: FormatCodeSettings): CodeAction[] {
+            synchronizeHostData();
+            const sourceFile = getValidSourceFile(fileName);
+            const span = { start, length: end - start };
+            const newLineChar = getNewLineOrDefaultFromHost(host);
+
+            let allFixes: CodeAction[] = [];
+
+            forEach(deduplicate(errorCodes), error => {
+                cancellationToken.throwIfCancellationRequested();
+
+                const context = {
+                    errorCode: error,
+                    sourceFile: sourceFile,
+                    span: span,
+                    program: program,
+                    newLineCharacter: newLineChar,
+                    host: host,
+                    cancellationToken: cancellationToken,
+                    rulesProvider: getRuleProvider(formatOptions)
+                };
+
+                const fixes = codefix.getFixes(context);
+                if (fixes) {
+                    allFixes = allFixes.concat(fixes);
+                }
+            });
+
+            return allFixes;
+        }
+
         function getDocCommentTemplateAtPosition(fileName: string, position: number): TextInsertion {
             return JsDoc.getDocCommentTemplateAtPosition(getNewLineOrDefaultFromHost(host), syntaxTreeCache.getCurrentSourceFile(fileName), position);
         }
@@ -1650,7 +1826,7 @@ namespace ts {
             const sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
 
             // Check if in a context where we don't want to perform any insertion
-            if (isInString(sourceFile, position) || isInComment(sourceFile, position)) {
+            if (isInString(sourceFile, position)) {
                 return false;
             }
 
@@ -1662,6 +1838,13 @@ namespace ts {
                 return false;
             }
 
+            switch (openingBrace) {
+                case CharacterCodes.singleQuote:
+                case CharacterCodes.doubleQuote:
+                case CharacterCodes.backtick:
+                    return !isInComment(sourceFile, position);
+            }
+
             return true;
         }
 
@@ -1713,13 +1896,12 @@ namespace ts {
 
                     // OK, we have found a match in the file.  This is only an acceptable match if
                     // it is contained within a comment.
-                    const token = getTokenAtPosition(sourceFile, matchPosition);
-                    if (!isInsideComment(sourceFile, token, matchPosition)) {
+                    if (!isInComment(sourceFile, matchPosition)) {
                         continue;
                     }
 
                     let descriptor: TodoCommentDescriptor = undefined;
-                    for (let i = 0, n = descriptors.length; i < n; i++) {
+                    for (let i = 0; i < descriptors.length; i++) {
                         if (matchArray[i + firstDescriptorCaptureIndex]) {
                             descriptor = descriptors[i];
                         }
@@ -1818,6 +2000,37 @@ namespace ts {
             return Rename.getRenameInfo(program.getTypeChecker(), defaultLibFileName, getCanonicalFileName, getValidSourceFile(fileName), position);
         }
 
+        function getRefactorContext(file: SourceFile, positionOrRange: number | TextRange, formatOptions?: FormatCodeSettings): RefactorContext {
+            const [startPosition, endPosition] = typeof positionOrRange === "number" ? [positionOrRange, undefined] : [positionOrRange.pos, positionOrRange.end];
+            return {
+                file,
+                startPosition,
+                endPosition,
+                program: getProgram(),
+                newLineCharacter: host.getNewLine(),
+                rulesProvider: getRuleProvider(formatOptions),
+                cancellationToken
+            };
+        }
+
+        function getApplicableRefactors(fileName: string, positionOrRange: number | TextRange): ApplicableRefactorInfo[] {
+            synchronizeHostData();
+            const file = getValidSourceFile(fileName);
+            return refactor.getApplicableRefactors(getRefactorContext(file, positionOrRange));
+        }
+
+        function getEditsForRefactor(
+            fileName: string,
+            formatOptions: FormatCodeSettings,
+            positionOrRange: number | TextRange,
+            refactorName: string,
+            actionName: string): RefactorEditInfo {
+
+            synchronizeHostData();
+            const file = getValidSourceFile(fileName);
+            return refactor.getEditsForRefactor(getRefactorContext(file, positionOrRange, formatOptions), refactorName, actionName);
+        }
+
         return {
             dispose,
             cleanupSemanticCache,
@@ -1846,6 +2059,7 @@ namespace ts {
             getRenameInfo,
             findRenameLocations,
             getNavigationBarItems,
+            getNavigationTree,
             getOutliningSpans,
             getTodoComments,
             getBraceMatchingAtPosition,
@@ -1855,14 +2069,18 @@ namespace ts {
             getFormattingEditsAfterKeystroke,
             getDocCommentTemplateAtPosition,
             isValidBraceCompletionAtPosition,
+            getCodeFixesAtPosition,
             getEmitOutput,
             getNonBoundSourceFile,
             getSourceFile,
-            getProgram
+            getProgram,
+            getApplicableRefactors,
+            getEditsForRefactor,
         };
     }
 
     /* @internal */
+    /** Names in the name table are escaped, so an identifier `__foo` will have a name table entry `___foo`. */
     export function getNameTable(sourceFile: SourceFile): Map<number> {
         if (!sourceFile.nameTable) {
             initializeNameTable(sourceFile);
@@ -1880,7 +2098,7 @@ namespace ts {
         function walk(node: Node) {
             switch (node.kind) {
                 case SyntaxKind.Identifier:
-                    nameTable[(<Identifier>node).text] = nameTable[(<Identifier>node).text] === undefined ? node.pos : -1;
+                    setNameTable((<Identifier>node).text, node);
                     break;
                 case SyntaxKind.StringLiteral:
                 case SyntaxKind.NumericLiteral:
@@ -1892,19 +2110,82 @@ namespace ts {
                         node.parent.kind === SyntaxKind.ExternalModuleReference ||
                         isArgumentOfElementAccessExpression(node) ||
                         isLiteralComputedPropertyDeclarationName(node)) {
-
-                        nameTable[(<LiteralExpression>node).text] = nameTable[(<LiteralExpression>node).text] === undefined ? node.pos : -1;
+                        setNameTable((<LiteralExpression>node).text, node);
                     }
                     break;
                 default:
                     forEachChild(node, walk);
-                    if (node.jsDocComments) {
-                        for (const jsDocComment of node.jsDocComments) {
-                            forEachChild(jsDocComment, walk);
+                    if (node.jsDoc) {
+                        for (const jsDoc of node.jsDoc) {
+                            forEachChild(jsDoc, walk);
                         }
                     }
             }
         }
+
+        function setNameTable(text: string, node: ts.Node): void {
+            nameTable.set(text, nameTable.get(text) === undefined ? node.pos : -1);
+        }
+    }
+
+    function isObjectLiteralElement(node: Node): node is ObjectLiteralElement  {
+        switch (node.kind) {
+            case SyntaxKind.JsxAttribute:
+            case SyntaxKind.JsxSpreadAttribute:
+            case SyntaxKind.PropertyAssignment:
+            case SyntaxKind.ShorthandPropertyAssignment:
+            case SyntaxKind.MethodDeclaration:
+            case SyntaxKind.GetAccessor:
+            case SyntaxKind.SetAccessor:
+                return true;
+        }
+        return false;
+    }
+
+    /**
+     * Returns the containing object literal property declaration given a possible name node, e.g. "a" in x = { "a": 1 }
+     */
+    /* @internal */
+    export function getContainingObjectLiteralElement(node: Node): ObjectLiteralElement {
+        switch (node.kind) {
+            case SyntaxKind.StringLiteral:
+            case SyntaxKind.NumericLiteral:
+                if (node.parent.kind === SyntaxKind.ComputedPropertyName) {
+                    return isObjectLiteralElement(node.parent.parent) ? node.parent.parent : undefined;
+                }
+                // falls through
+            case SyntaxKind.Identifier:
+                return isObjectLiteralElement(node.parent) &&
+                    (node.parent.parent.kind === SyntaxKind.ObjectLiteralExpression || node.parent.parent.kind === SyntaxKind.JsxAttributes) &&
+                    (<ObjectLiteralElement>node.parent).name === node ? node.parent as ObjectLiteralElement : undefined;
+        }
+        return undefined;
+    }
+
+    /* @internal */
+    export function getPropertySymbolsFromContextualType(typeChecker: TypeChecker, node: ObjectLiteralElement): Symbol[] {
+        const objectLiteral = <ObjectLiteralExpression | JsxAttributes>node.parent;
+        const contextualType = typeChecker.getContextualType(objectLiteral);
+        const name = getTextOfPropertyName(node.name);
+        if (name && contextualType) {
+            const result: Symbol[] = [];
+            const symbol = contextualType.getProperty(name);
+            if (contextualType.flags & TypeFlags.Union) {
+                forEach((<UnionType>contextualType).types, t => {
+                    const symbol = t.getProperty(name);
+                    if (symbol) {
+                        result.push(symbol);
+                    }
+                });
+                return result;
+            }
+
+            if (symbol) {
+                result.push(symbol);
+                return result;
+            }
+        }
+        return undefined;
     }
 
     function isArgumentOfElementAccessExpression(node: Node) {
@@ -1918,10 +2199,10 @@ namespace ts {
     declare const __dirname: string;
 
     /**
-      * Get the path of the default library files (lib.d.ts) as distributed with the typescript
-      * node package.
-      * The functionality is not supported if the ts module is consumed outside of a node module.
-      */
+     * Get the path of the default library files (lib.d.ts) as distributed with the typescript
+     * node package.
+     * The functionality is not supported if the ts module is consumed outside of a node module.
+     */
     export function getDefaultLibFilePath(options: CompilerOptions): string {
         // Check __dirname is defined and that we are on a node.js system.
         if (typeof __dirname !== "undefined") {
@@ -1931,9 +2212,5 @@ namespace ts {
         throw new Error("getDefaultLibFilePath is only supported when consumed as a node module. ");
     }
 
-    function initializeServices() {
-        objectAllocator = getServicesObjectAllocator();
-    }
-
-    initializeServices();
+    objectAllocator = getServicesObjectAllocator();
 }
diff --git a/src/services/shims.ts b/src/services/shims.ts
index 56ab852..1c37f59 100644
--- a/src/services/shims.ts
+++ b/src/services/shims.ts
@@ -37,7 +37,7 @@ namespace ts {
          *
          * Or undefined value if there was no change.
          */
-        getChangeRange(oldSnapshot: ScriptSnapshotShim): string;
+        getChangeRange(oldSnapshot: ScriptSnapshotShim): string | undefined;
 
         /** Releases all resources held by this script snapshot */
         dispose?(): void;
@@ -49,7 +49,7 @@ namespace ts {
         error(s: string): void;
     }
 
-    /** Public interface of the host of a language service shim instance.*/
+    /** Public interface of the host of a language service shim instance. */
     export interface LanguageServiceShimHost extends Logger {
         getCompilationSettings(): string;
 
@@ -119,13 +119,13 @@ namespace ts {
     }
 
     export interface Shim {
-        dispose(dummy: any): void;
+        dispose(_dummy: any): void;
     }
 
     export interface LanguageServiceShim extends Shim {
         languageService: LanguageService;
 
-        dispose(dummy: any): void;
+        dispose(_dummy: any): void;
 
         refresh(throwOnError: boolean): void;
 
@@ -224,6 +224,9 @@ namespace ts {
          */
         getNavigationBarItems(fileName: string): string;
 
+        /** Returns a JSON-encoded value of the type ts.NavigationTree. */
+        getNavigationTree(fileName: string): string;
+
         /**
          * Returns a JSON-encoded value of the type:
          * { textSpan: { start: number, length: number }; hintSpan: { start: number, length: number }; bannerText: string; autoCollapse: boolean } [] = [];
@@ -289,8 +292,7 @@ namespace ts {
         public getChangeRange(oldSnapshot: IScriptSnapshot): TextChangeRange {
             const oldSnapshotShim = <ScriptSnapshotShimAdapter>oldSnapshot;
             const encoded = this.scriptSnapshotShim.getChangeRange(oldSnapshotShim.scriptSnapshotShim);
-            // TODO: should this be '==='?
-            if (encoded == null) {
+            if (encoded === null) {
                 return null;
             }
 
@@ -313,7 +315,7 @@ namespace ts {
         private loggingEnabled = false;
         private tracingEnabled = false;
 
-        public resolveModuleNames: (moduleName: string[], containingFile: string) => ResolvedModule[];
+        public resolveModuleNames: (moduleName: string[], containingFile: string) => ResolvedModuleFull[];
         public resolveTypeReferenceDirectives: (typeDirectiveNames: string[], containingFile: string) => ResolvedTypeReferenceDirective[];
         public directoryExists: (directoryName: string) => boolean;
 
@@ -325,7 +327,7 @@ namespace ts {
                     const resolutionsInFile = <MapLike<string>>JSON.parse(this.shimHost.getModuleResolutionsForFile(containingFile));
                     return map(moduleNames, name => {
                         const result = getProperty(resolutionsInFile, name);
-                        return result ? { resolvedFileName: result } : undefined;
+                        return result ? { resolvedFileName: result, extension: extensionFromPath(result), isExternalLibraryImport: false } : undefined;
                     });
                 };
             }
@@ -378,11 +380,13 @@ namespace ts {
 
         public getCompilationSettings(): CompilerOptions {
             const settingsJson = this.shimHost.getCompilationSettings();
-            // TODO: should this be '==='?
-            if (settingsJson == null || settingsJson == "") {
+            if (settingsJson === null || settingsJson === "") {
                 throw Error("LanguageServiceShimHostAdapter.getCompilationSettings: empty compilationSettings");
             }
-            return <CompilerOptions>JSON.parse(settingsJson);
+            const compilerOptions = <CompilerOptions>JSON.parse(settingsJson);
+            // permit language service to handle all files (filtering should be performed on the host side)
+            compilerOptions.allowNonTsExtensions = true;
+            return compilerOptions;
         }
 
         public getScriptFileNames(): string[] {
@@ -410,7 +414,7 @@ namespace ts {
 
         public getLocalizedDiagnosticMessages(): any {
             const diagnosticMessagesJson = this.shimHost.getLocalizedDiagnosticMessages();
-            if (diagnosticMessagesJson == null || diagnosticMessagesJson == "") {
+            if (diagnosticMessagesJson === null || diagnosticMessagesJson === "") {
                 return null;
             }
 
@@ -441,7 +445,7 @@ namespace ts {
         }
 
         public readDirectory(path: string, extensions?: string[], exclude?: string[], include?: string[], depth?: number): string[] {
-            const pattern = getFileMatcherPatterns(path, extensions, exclude, include,
+            const pattern = getFileMatcherPatterns(path, exclude, include,
                 this.shimHost.useCaseSensitiveFileNames(), this.shimHost.getCurrentDirectory());
             return JSON.parse(this.shimHost.readDirectory(
                 path,
@@ -463,29 +467,6 @@ namespace ts {
         }
     }
 
-    /** A cancellation that throttles calls to the host */
-    class ThrottledCancellationToken implements HostCancellationToken {
-        // Store when we last tried to cancel.  Checking cancellation can be expensive (as we have
-        // to marshall over to the host layer).  So we only bother actually checking once enough
-        // time has passed.
-        private lastCancellationCheckTime = 0;
-
-        constructor(private hostCancellationToken: HostCancellationToken) {
-        }
-
-        public isCancellationRequested(): boolean {
-            const time = timestamp();
-            const duration = Math.abs(time - this.lastCancellationCheckTime);
-            if (duration > 10) {
-                // Check no more than once every 10 ms.
-                this.lastCancellationCheckTime = time;
-                return this.hostCancellationToken.isCancellationRequested();
-            }
-
-            return false;
-        }
-    }
-
     export class CoreServicesShimHostAdapter implements ParseConfigHost, ModuleResolutionHost {
 
         public directoryExists: (directoryName: string) => boolean;
@@ -506,7 +487,7 @@ namespace ts {
             // Wrap the API changes for 2.0 release. This try/catch
             // should be removed once TypeScript 2.0 has shipped.
             try {
-                const pattern = getFileMatcherPatterns(rootDir, extensions, exclude, include,
+                const pattern = getFileMatcherPatterns(rootDir, exclude, include,
                     this.shimHost.useCaseSensitiveFileNames(), this.shimHost.getCurrentDirectory());
                 return JSON.parse(this.shimHost.readDirectory(
                     rootDir,
@@ -597,7 +578,7 @@ namespace ts {
         constructor(private factory: ShimFactory) {
             factory.registerShim(this);
         }
-        public dispose(dummy: any): void {
+        public dispose(_dummy: any): void {
             this.factory.unregisterShim(this);
         }
     }
@@ -971,6 +952,13 @@ namespace ts {
             );
         }
 
+        public getNavigationTree(fileName: string): string {
+            return this.forwardJSONCall(
+                `getNavigationTree('${fileName}')`,
+                () => this.languageService.getNavigationTree(fileName)
+            );
+        }
+
         public getOutliningSpans(fileName: string): string {
             return this.forwardJSONCall(
                 `getOutliningSpans('${fileName}')`,
@@ -1050,8 +1038,13 @@ namespace ts {
             return this.forwardJSONCall(`resolveModuleName('${fileName}')`, () => {
                 const compilerOptions = <CompilerOptions>JSON.parse(compilerOptionsJson);
                 const result = resolveModuleName(moduleName, normalizeSlashes(fileName), compilerOptions, this.host);
+                let resolvedFileName = result.resolvedModule ? result.resolvedModule.resolvedFileName : undefined;
+                if (result.resolvedModule && result.resolvedModule.extension !== Extension.Ts && result.resolvedModule.extension !== Extension.Tsx && result.resolvedModule.extension !== Extension.Dts) {
+                    resolvedFileName = undefined;
+                }
+
                 return {
-                    resolvedFileName: result.resolvedModule ? result.resolvedModule.resolvedFileName : undefined,
+                    resolvedFileName,
                     failedLookupLocations: result.failedLookupLocations
                 };
             });
@@ -1116,27 +1109,16 @@ namespace ts {
                 () => {
                     const text = sourceTextSnapshot.getText(0, sourceTextSnapshot.getLength());
 
-                    const result = parseConfigFileTextToJson(fileName, text);
-
-                    if (result.error) {
-                        return {
-                            options: {},
-                            typingOptions: {},
-                            files: [],
-                            raw: {},
-                            errors: [realizeDiagnostic(result.error, "\r\n")]
-                        };
-                    }
-
+                    const result = parseJsonText(fileName, text);
                     const normalizedFileName = normalizeSlashes(fileName);
-                    const configFile = parseJsonConfigFileContent(result.config, this.host, getDirectoryPath(normalizedFileName), /*existingOptions*/ {}, normalizedFileName);
+                    const configFile = parseJsonSourceFileConfigFileContent(result, this.host, getDirectoryPath(normalizedFileName), /*existingOptions*/ {}, normalizedFileName);
 
                     return {
                         options: configFile.options,
-                        typingOptions: configFile.typingOptions,
+                        typeAcquisition: configFile.typeAcquisition,
                         files: configFile.fileNames,
                         raw: configFile.raw,
-                        errors: realizeDiagnostics(configFile.errors, "\r\n")
+                        errors: realizeDiagnostics(result.parseDiagnostics.concat(configFile.errors), "\r\n")
                     };
                 });
         }
@@ -1158,8 +1140,8 @@ namespace ts {
                     toPath(info.projectRootPath, info.projectRootPath, getCanonicalFileName),
                     toPath(info.safeListPath, info.safeListPath, getCanonicalFileName),
                     info.packageNameToTypingLocation,
-                    info.typingOptions,
-                    info.compilerOptions);
+                    info.typeAcquisition,
+                    info.unresolvedImports);
             });
         }
     }
@@ -1222,7 +1204,7 @@ namespace ts {
         }
 
         public unregisterShim(shim: Shim): void {
-            for (let i = 0, n = this._shims.length; i < n; i++) {
+            for (let i = 0; i < this._shims.length; i++) {
                 if (this._shims[i] === shim) {
                     delete this._shims[i];
                     return;
@@ -1235,7 +1217,7 @@ namespace ts {
 
     // Here we expose the TypeScript services as an external module
     // so that it may be consumed easily like a node module.
-    declare var module: any;
+    declare const module: any;
     if (typeof module !== "undefined" && module.exports) {
         module.exports = ts;
     }
@@ -1251,11 +1233,8 @@ namespace TypeScript.Services {
     export const TypeScriptServicesFactory = ts.TypeScriptServicesFactory;
 }
 
-/* tslint:disable:no-unused-variable */
 // 'toolsVersion' gets consumed by the managed side, so it's not unused.
 // TODO: it should be moved into a namespace though.
 
 /* @internal */
-const toolsVersion = "2.1";
-
-/* tslint:enable:no-unused-variable */
+const toolsVersion = "2.5";
diff --git a/src/services/signatureHelp.ts b/src/services/signatureHelp.ts
index 211e55b..b250ad4 100644
--- a/src/services/signatureHelp.ts
+++ b/src/services/signatureHelp.ts
@@ -1,174 +1,13 @@
 ///<reference path='services.ts' />
 /* @internal */
 namespace ts.SignatureHelp {
-
-    // A partially written generic type expression is not guaranteed to have the correct syntax tree. the expression could be parsed as less than/greater than expression or a comma expression
-    // or some other combination depending on what the user has typed so far. For the purposes of signature help we need to consider any location after "<" as a possible generic type reference.
-    // To do this, the method will back parse the expression starting at the position required. it will try to parse the current expression as a generic type expression, if it did succeed it
-    // will return the generic identifier that started the expression (e.g. "foo" in "foo<any, |"). It is then up to the caller to ensure that this is a valid generic expression through
-    // looking up the type. The method will also keep track of the parameter index inside the expression.
-    // public static isInPartiallyWrittenTypeArgumentList(syntaxTree: TypeScript.SyntaxTree, position: number): any {
-    //    let token = Syntax.findTokenOnLeft(syntaxTree.sourceUnit(), position, /*includeSkippedTokens*/ true);
-
-    //    if (token && TypeScript.Syntax.hasAncestorOfKind(token, TypeScript.SyntaxKind.TypeParameterList)) {
-    //        // We are in the wrong generic list. bail out
-    //        return null;
-    //    }
-
-    //    let stack = 0;
-    //    let argumentIndex = 0;
-
-    //    whileLoop:
-    //    while (token) {
-    //        switch (token.kind()) {
-    //            case TypeScript.SyntaxKind.LessThanToken:
-    //                if (stack === 0) {
-    //                    // Found the beginning of the generic argument expression
-    //                    let lessThanToken = token;
-    //                    token = previousToken(token, /*includeSkippedTokens*/ true);
-    //                    if (!token || token.kind() !== TypeScript.SyntaxKind.IdentifierName) {
-    //                        break whileLoop;
-    //                    }
-
-    //                    // Found the name, return the data
-    //                    return {
-    //                        genericIdentifer: token,
-    //                        lessThanToken: lessThanToken,
-    //                        argumentIndex: argumentIndex
-    //                    };
-    //                }
-    //                else if (stack < 0) {
-    //                    // Seen one too many less than tokens, bail out
-    //                    break whileLoop;
-    //                }
-    //                else {
-    //                    stack--;
-    //                }
-
-    //                break;
-
-    //            case TypeScript.SyntaxKind.GreaterThanGreaterThanGreaterThanToken:
-    //                stack++;
-
-    //            // Intentional fall through
-    //            case TypeScript.SyntaxKind.GreaterThanToken:
-    //                stack++;
-    //                break;
-
-    //            case TypeScript.SyntaxKind.CommaToken:
-    //                if (stack == 0) {
-    //                    argumentIndex++;
-    //                }
-
-    //                break;
-
-    //            case TypeScript.SyntaxKind.CloseBraceToken:
-    //                // This can be object type, skip untill we find the matching open brace token
-    //                let unmatchedOpenBraceTokens = 0;
-
-    //                // Skip untill the matching open brace token
-    //                token = SignatureInfoHelpers.moveBackUpTillMatchingTokenKind(token, TypeScript.SyntaxKind.CloseBraceToken, TypeScript.SyntaxKind.OpenBraceToken);
-    //                if (!token) {
-    //                    // No matching token was found. bail out
-    //                    break whileLoop;
-    //                }
-
-    //                break;
-
-    //            case TypeScript.SyntaxKind.EqualsGreaterThanToken:
-    //                // This can be a function type or a constructor type. In either case, we want to skip the function definition
-    //                token = previousToken(token, /*includeSkippedTokens*/ true);
-
-    //                if (token && token.kind() === TypeScript.SyntaxKind.CloseParenToken) {
-    //                    // Skip untill the matching open paren token
-    //                    token = SignatureInfoHelpers.moveBackUpTillMatchingTokenKind(token, TypeScript.SyntaxKind.CloseParenToken, TypeScript.SyntaxKind.OpenParenToken);
-
-    //                    if (token && token.kind() === TypeScript.SyntaxKind.GreaterThanToken) {
-    //                        // Another generic type argument list, skip it\
-    //                        token = SignatureInfoHelpers.moveBackUpTillMatchingTokenKind(token, TypeScript.SyntaxKind.GreaterThanToken, TypeScript.SyntaxKind.LessThanToken);
-    //                    }
-
-    //                    if (token && token.kind() === TypeScript.SyntaxKind.NewKeyword) {
-    //                        // In case this was a constructor type, skip the new keyword
-    //                        token = previousToken(token, /*includeSkippedTokens*/ true);
-    //                    }
-
-    //                    if (!token) {
-    //                        // No matching token was found. bail out
-    //                        break whileLoop;
-    //                    }
-    //                }
-    //                else {
-    //                    // This is not a function type. exit the main loop
-    //                    break whileLoop;
-    //                }
-
-    //                break;
-
-    //            case TypeScript.SyntaxKind.IdentifierName:
-    //            case TypeScript.SyntaxKind.AnyKeyword:
-    //            case TypeScript.SyntaxKind.NumberKeyword:
-    //            case TypeScript.SyntaxKind.StringKeyword:
-    //            case TypeScript.SyntaxKind.VoidKeyword:
-    //            case TypeScript.SyntaxKind.BooleanKeyword:
-    //            case TypeScript.SyntaxKind.DotToken:
-    //            case TypeScript.SyntaxKind.OpenBracketToken:
-    //            case TypeScript.SyntaxKind.CloseBracketToken:
-    //                // Valid tokens in a type name. Skip.
-    //                break;
-
-    //            default:
-    //                break whileLoop;
-    //        }
-
-    //        token = previousToken(token, /*includeSkippedTokens*/ true);
-    //    }
-
-    //    return null;
-    // }
-
-    // private static moveBackUpTillMatchingTokenKind(token: TypeScript.ISyntaxToken, tokenKind: TypeScript.SyntaxKind, matchingTokenKind: TypeScript.SyntaxKind): TypeScript.ISyntaxToken {
-    //    if (!token || token.kind() !== tokenKind) {
-    //        throw TypeScript.Errors.invalidOperation();
-    //    }
-
-    //    // Skip the current token
-    //    token = previousToken(token, /*includeSkippedTokens*/ true);
-
-    //    let stack = 0;
-
-    //    while (token) {
-    //        if (token.kind() === matchingTokenKind) {
-    //            if (stack === 0) {
-    //                // Found the matching token, return
-    //                return token;
-    //            }
-    //            else if (stack < 0) {
-    //                // tokens overlapped.. bail out.
-    //                break;
-    //            }
-    //            else {
-    //                stack--;
-    //            }
-    //        }
-    //        else if (token.kind() === tokenKind) {
-    //            stack++;
-    //        }
-
-    //        // Move back
-    //        token = previousToken(token, /*includeSkippedTokens*/ true);
-    //    }
-
-    //    // Did not find matching token
-    //    return null;
-    // }
-
     const emptyArray: any[] = [];
 
     export const enum ArgumentListKind {
         TypeArguments,
         CallArguments,
-        TaggedTemplateArguments
+        TaggedTemplateArguments,
+        JSXAttributesArguments
     }
 
     export interface ArgumentListInfo {
@@ -237,7 +76,7 @@ namespace ts.SignatureHelp {
         const typeChecker = program.getTypeChecker();
         for (const sourceFile of program.getSourceFiles()) {
             const nameToDeclarations = sourceFile.getNamedDeclarations();
-            const declarations = nameToDeclarations[name.text];
+            const declarations = nameToDeclarations.get(name.text);
 
             if (declarations) {
                 for (const declaration of declarations) {
@@ -260,22 +99,22 @@ namespace ts.SignatureHelp {
      * Returns relevant information for the argument list and the current argument if we are
      * in the argument of an invocation; returns undefined otherwise.
      */
-    function getImmediatelyContainingArgumentInfo(node: Node, position: number, sourceFile: SourceFile): ArgumentListInfo {
-        if (node.parent.kind === SyntaxKind.CallExpression || node.parent.kind === SyntaxKind.NewExpression) {
+    export function getImmediatelyContainingArgumentInfo(node: Node, position: number, sourceFile: SourceFile): ArgumentListInfo {
+        if (isCallOrNewExpression(node.parent)) {
             const callExpression = <CallExpression>node.parent;
             // There are 3 cases to handle:
-            //   1. The token introduces a list, and should begin a sig help session
+            //   1. The token introduces a list, and should begin a signature help session
             //   2. The token is either not associated with a list, or ends a list, so the session should end
-            //   3. The token is buried inside a list, and should give sig help
+            //   3. The token is buried inside a list, and should give signature help
             //
             // The following are examples of each:
             //
             //    Case 1:
-            //          foo<#T, U>(#a, b)    -> The token introduces a list, and should begin a sig help session
+            //          foo<#T, U>(#a, b)    -> The token introduces a list, and should begin a signature help session
             //    Case 2:
             //          fo#o<T, U>#(a, b)#   -> The token is either not associated with a list, or ends a list, so the session should end
             //    Case 3:
-            //          foo<T#, U#>(a#, #b#) -> The token is buried inside a list, and should give sig help
+            //          foo<T#, U#>(a#, #b#) -> The token is buried inside a list, and should give signature help
             // Find out if 'node' is an argument, a type argument, or neither
             if (node.kind === SyntaxKind.LessThanToken ||
                 node.kind === SyntaxKind.OpenParenToken) {
@@ -295,7 +134,7 @@ namespace ts.SignatureHelp {
 
             // findListItemInfo can return undefined if we are not in parent's argument list
             // or type argument list. This includes cases where the cursor is:
-            //   - To the right of the closing paren, non-substitution template, or template tail.
+            //   - To the right of the closing parenthesis, non-substitution template, or template tail.
             //   - Between the type arguments and the arguments (greater than token)
             //   - On the target of the call (parent.func)
             //   - On the 'new' keyword in a 'new' expression
@@ -352,6 +191,22 @@ namespace ts.SignatureHelp {
 
             return getArgumentListInfoForTemplate(tagExpression, argumentIndex, sourceFile);
         }
+        else if (node.parent && isJsxOpeningLikeElement(node.parent)) {
+            // Provide a signature help for JSX opening element or JSX self-closing element.
+            // This is not guarantee that JSX tag-name is resolved into stateless function component. (that is done in "getSignatureHelpItems")
+            // i.e
+            //      export function MainButton(props: ButtonProps, context: any): JSX.Element { ... }
+            //      <MainButton /*signatureHelp*/
+            const attributeSpanStart = node.parent.attributes.getFullStart();
+            const attributeSpanEnd = skipTrivia(sourceFile.text, node.parent.attributes.getEnd(), /*stopAfterLineBreak*/ false);
+            return {
+                kind: ArgumentListKind.JSXAttributesArguments,
+                invocation: node.parent,
+                argumentsSpan: createTextSpan(attributeSpanStart, attributeSpanEnd - attributeSpanStart),
+                argumentIndex: 0,
+                argumentCount: 1
+            };
+        }
 
         return undefined;
     }
@@ -392,7 +247,7 @@ namespace ts.SignatureHelp {
         //
         // Note: this subtlety only applies to the last comma.  If you had "Foo(a,,"  then
         // we'll have:  'a' '<comma>' '<missing>'
-        // That will give us 2 non-commas.  We then add one for the last comma, givin us an
+        // That will give us 2 non-commas.  We then add one for the last comma, giving us an
         // arg count of 3.
         const listChildren = argumentsList.getChildren();
 
@@ -435,7 +290,6 @@ namespace ts.SignatureHelp {
             : (<TemplateExpression>tagExpression.template).templateSpans.length + 1;
 
         Debug.assert(argumentIndex === 0 || argumentIndex < argumentCount, `argumentCount < argumentIndex, ${argumentCount} < ${argumentIndex}`);
-
         return {
             kind: ArgumentListKind.TaggedTemplateArguments,
             invocation: tagExpression,
@@ -557,7 +411,9 @@ namespace ts.SignatureHelp {
                 addRange(prefixDisplayParts, callTargetDisplayParts);
             }
 
+            let isVariadic: boolean;
             if (isTypeParameterList) {
+                isVariadic = false; // type parameter lists are not variadic
                 prefixDisplayParts.push(punctuationPart(SyntaxKind.LessThanToken));
                 const typeParameters = candidateSignature.typeParameters;
                 signatureHelpParameters = typeParameters && typeParameters.length > 0 ? map(typeParameters, createSignatureHelpParameterForTypeParameter) : emptyArray;
@@ -567,6 +423,7 @@ namespace ts.SignatureHelp {
                 addRange(suffixDisplayParts, parameterParts);
             }
             else {
+                isVariadic = candidateSignature.hasRestParameter;
                 const typeParameterParts = mapToDisplayParts(writer =>
                     typeChecker.getSymbolDisplayBuilder().buildDisplayForTypeParametersAndDelimiters(candidateSignature.typeParameters, writer, invocation));
                 addRange(prefixDisplayParts, typeParameterParts);
@@ -582,12 +439,13 @@ namespace ts.SignatureHelp {
             addRange(suffixDisplayParts, returnTypeParts);
 
             return {
-                isVariadic: candidateSignature.hasRestParameter,
+                isVariadic,
                 prefixDisplayParts,
                 suffixDisplayParts,
                 separatorDisplayParts: [punctuationPart(SyntaxKind.CommaToken), spacePart()],
                 parameters: signatureHelpParameters,
-                documentation: candidateSignature.getDocumentationComment()
+                documentation: candidateSignature.getDocumentationComment(),
+                tags: candidateSignature.getJsDocTags()
             };
         });
 
diff --git a/src/services/symbolDisplay.ts b/src/services/symbolDisplay.ts
index 8b4d986..345f071 100644
--- a/src/services/symbolDisplay.ts
+++ b/src/services/symbolDisplay.ts
@@ -1,20 +1,22 @@
 /* @internal */
 namespace ts.SymbolDisplay {
     // TODO(drosen): use contextual SemanticMeaning.
-    export function getSymbolKind(typeChecker: TypeChecker, symbol: Symbol, location: Node): string {
-        const flags = symbol.getFlags();
+    export function getSymbolKind(typeChecker: TypeChecker, symbol: Symbol, location: Node): ScriptElementKind {
+        const { flags } = symbol;
 
-        if (flags & SymbolFlags.Class) return getDeclarationOfKind(symbol, SyntaxKind.ClassExpression) ?
+        if (flags & SymbolFlags.Class) {
+            return getDeclarationOfKind(symbol, SyntaxKind.ClassExpression) ?
             ScriptElementKind.localClassElement : ScriptElementKind.classElement;
+        }
         if (flags & SymbolFlags.Enum) return ScriptElementKind.enumElement;
         if (flags & SymbolFlags.TypeAlias) return ScriptElementKind.typeElement;
         if (flags & SymbolFlags.Interface) return ScriptElementKind.interfaceElement;
         if (flags & SymbolFlags.TypeParameter) return ScriptElementKind.typeParameterElement;
 
-        const result = getSymbolKindOfConstructorPropertyMethodAccessorFunctionOrVar(typeChecker, symbol, flags, location);
+        const result = getSymbolKindOfConstructorPropertyMethodAccessorFunctionOrVar(typeChecker, symbol, location);
         if (result === ScriptElementKind.unknown) {
             if (flags & SymbolFlags.TypeParameter) return ScriptElementKind.typeParameterElement;
-            if (flags & SymbolFlags.EnumMember) return ScriptElementKind.variableElement;
+            if (flags & SymbolFlags.EnumMember) return ScriptElementKind.enumMemberElement;
             if (flags & SymbolFlags.Alias) return ScriptElementKind.alias;
             if (flags & SymbolFlags.Module) return ScriptElementKind.moduleElement;
         }
@@ -22,7 +24,7 @@ namespace ts.SymbolDisplay {
         return result;
     }
 
-    function getSymbolKindOfConstructorPropertyMethodAccessorFunctionOrVar(typeChecker: TypeChecker, symbol: Symbol, flags: SymbolFlags, location: Node) {
+    function getSymbolKindOfConstructorPropertyMethodAccessorFunctionOrVar(typeChecker: TypeChecker, symbol: Symbol, location: Node): ScriptElementKind {
         if (typeChecker.isUndefinedSymbol(symbol)) {
             return ScriptElementKind.variableElement;
         }
@@ -32,6 +34,7 @@ namespace ts.SymbolDisplay {
         if (location.kind === SyntaxKind.ThisKeyword && isExpression(location)) {
             return ScriptElementKind.parameterElement;
         }
+        const { flags } = symbol;
         if (flags & SymbolFlags.Variable) {
             if (isFirstDeclarationOfSymbolParameter(symbol)) {
                 return ScriptElementKind.parameterElement;
@@ -51,7 +54,7 @@ namespace ts.SymbolDisplay {
         if (flags & SymbolFlags.Constructor) return ScriptElementKind.constructorImplementationElement;
 
         if (flags & SymbolFlags.Property) {
-            if (flags & SymbolFlags.SyntheticProperty) {
+            if (flags & SymbolFlags.Transient && (<TransientSymbol>symbol).checkFlags & CheckFlags.Synthetic) {
                 // If union property is result of union of non method (property/accessors/variables), it is labeled as property
                 const unionPropertyKind = forEach(typeChecker.getRootSymbols(symbol), rootSymbol => {
                     const rootSymbolFlags = rootSymbol.getFlags();
@@ -71,6 +74,9 @@ namespace ts.SymbolDisplay {
                 }
                 return unionPropertyKind;
             }
+            if (location.parent && isJsxAttribute(location.parent)) {
+                return ScriptElementKind.jsxAttribute;
+            }
             return ScriptElementKind.memberVariableElement;
         }
 
@@ -89,8 +95,9 @@ namespace ts.SymbolDisplay {
 
         const displayParts: SymbolDisplayPart[] = [];
         let documentation: SymbolDisplayPart[];
+        let tags: JSDocTagInfo[];
         const symbolFlags = symbol.flags;
-        let symbolKind = getSymbolKindOfConstructorPropertyMethodAccessorFunctionOrVar(typeChecker, symbol, symbolFlags, location);
+        let symbolKind = getSymbolKindOfConstructorPropertyMethodAccessorFunctionOrVar(typeChecker, symbol, location);
         let hasAddedSymbolInfo: boolean;
         const isThisExpression = location.kind === SyntaxKind.ThisKeyword && isExpression(location);
         let type: Type;
@@ -114,23 +121,27 @@ namespace ts.SymbolDisplay {
                 }
 
                 // try get the call/construct signature from the type if it matches
-                let callExpression: CallExpression;
-                if (location.kind === SyntaxKind.CallExpression || location.kind === SyntaxKind.NewExpression) {
-                    callExpression = <CallExpression>location;
+                let callExpressionLike: CallExpression | NewExpression | JsxOpeningLikeElement;
+                if (isCallOrNewExpression(location)) {
+                    callExpressionLike = <CallExpression | NewExpression>location;
                 }
                 else if (isCallExpressionTarget(location) || isNewExpressionTarget(location)) {
-                    callExpression = <CallExpression>location.parent;
+                    callExpressionLike = <CallExpression | NewExpression>location.parent;
+                }
+                else if (location.parent && isJsxOpeningLikeElement(location.parent) && isFunctionLike(symbol.valueDeclaration)) {
+                    callExpressionLike = <JsxOpeningLikeElement>location.parent;
                 }
 
-                if (callExpression) {
+                if (callExpressionLike) {
                     const candidateSignatures: Signature[] = [];
-                    signature = typeChecker.getResolvedSignature(callExpression, candidateSignatures);
+                    signature = typeChecker.getResolvedSignature(callExpressionLike, candidateSignatures);
                     if (!signature && candidateSignatures.length) {
                         // Use the first candidate:
                         signature = candidateSignatures[0];
                     }
 
-                    const useConstructSignatures = callExpression.kind === SyntaxKind.NewExpression || callExpression.expression.kind === SyntaxKind.SuperKeyword;
+                    const useConstructSignatures = callExpressionLike.kind === SyntaxKind.NewExpression || (isCallExpression(callExpressionLike) && callExpressionLike.expression.kind === SyntaxKind.SuperKeyword);
+
                     const allSignatures = useConstructSignatures ? type.getConstructSignatures() : type.getCallSignatures();
 
                     if (!contains(allSignatures, signature.target) && !contains(allSignatures, signature)) {
@@ -160,6 +171,7 @@ namespace ts.SymbolDisplay {
                         }
 
                         switch (symbolKind) {
+                            case ScriptElementKind.jsxAttribute:
                             case ScriptElementKind.memberVariableElement:
                             case ScriptElementKind.variableElement:
                             case ScriptElementKind.constElement:
@@ -173,7 +185,7 @@ namespace ts.SymbolDisplay {
                                     displayParts.push(keywordPart(SyntaxKind.NewKeyword));
                                     displayParts.push(spacePart());
                                 }
-                                if (!(type.flags & TypeFlags.Anonymous) && type.symbol) {
+                                if (!(type.flags & TypeFlags.Object && (<ObjectType>type).objectFlags & ObjectFlags.Anonymous) && type.symbol) {
                                     addRange(displayParts, symbolToDisplayParts(typeChecker, type.symbol, enclosingDeclaration, /*meaning*/ undefined, SymbolFormatFlags.WriteTypeParametersOrArguments));
                                 }
                                 addSignatureDisplayParts(signature, allSignatures, TypeFormatFlags.WriteArrowStyleSignature);
@@ -190,27 +202,33 @@ namespace ts.SymbolDisplay {
                     (location.kind === SyntaxKind.ConstructorKeyword && location.parent.kind === SyntaxKind.Constructor)) { // At constructor keyword of constructor declaration
                     // get the signature from the declaration and write it
                     const functionDeclaration = <FunctionLikeDeclaration>location.parent;
-                    const allSignatures = functionDeclaration.kind === SyntaxKind.Constructor ? type.getNonNullableType().getConstructSignatures() : type.getNonNullableType().getCallSignatures();
-                    if (!typeChecker.isImplementationOfOverload(functionDeclaration)) {
-                        signature = typeChecker.getSignatureFromDeclaration(functionDeclaration);
-                    }
-                    else {
-                        signature = allSignatures[0];
-                    }
+                    // Use function declaration to write the signatures only if the symbol corresponding to this declaration
+                    const locationIsSymbolDeclaration = findDeclaration(symbol, declaration =>
+                        declaration === (location.kind === SyntaxKind.ConstructorKeyword ? functionDeclaration.parent : functionDeclaration));
+
+                    if (locationIsSymbolDeclaration) {
+                        const allSignatures = functionDeclaration.kind === SyntaxKind.Constructor ? type.getNonNullableType().getConstructSignatures() : type.getNonNullableType().getCallSignatures();
+                        if (!typeChecker.isImplementationOfOverload(functionDeclaration)) {
+                            signature = typeChecker.getSignatureFromDeclaration(functionDeclaration);
+                        }
+                        else {
+                            signature = allSignatures[0];
+                        }
 
-                    if (functionDeclaration.kind === SyntaxKind.Constructor) {
-                        // show (constructor) Type(...) signature
-                        symbolKind = ScriptElementKind.constructorImplementationElement;
-                        addPrefixForAnyFunctionOrVar(type.symbol, symbolKind);
-                    }
-                    else {
-                        // (function/method) symbol(..signature)
-                        addPrefixForAnyFunctionOrVar(functionDeclaration.kind === SyntaxKind.CallSignature &&
-                            !(type.symbol.flags & SymbolFlags.TypeLiteral || type.symbol.flags & SymbolFlags.ObjectLiteral) ? type.symbol : symbol, symbolKind);
-                    }
+                        if (functionDeclaration.kind === SyntaxKind.Constructor) {
+                            // show (constructor) Type(...) signature
+                            symbolKind = ScriptElementKind.constructorImplementationElement;
+                            addPrefixForAnyFunctionOrVar(type.symbol, symbolKind);
+                        }
+                        else {
+                            // (function/method) symbol(..signature)
+                            addPrefixForAnyFunctionOrVar(functionDeclaration.kind === SyntaxKind.CallSignature &&
+                                !(type.symbol.flags & SymbolFlags.TypeLiteral || type.symbol.flags & SymbolFlags.ObjectLiteral) ? type.symbol : symbol, symbolKind);
+                        }
 
-                    addSignatureDisplayParts(signature, allSignatures);
-                    hasAddedSymbolInfo = true;
+                        addSignatureDisplayParts(signature, allSignatures);
+                        hasAddedSymbolInfo = true;
+                    }
                 }
             }
         }
@@ -259,7 +277,7 @@ namespace ts.SymbolDisplay {
         }
         if (symbolFlags & SymbolFlags.Module) {
             addNewLineIfDisplayPartsExist();
-            const declaration = <ModuleDeclaration>getDeclarationOfKind(symbol, SyntaxKind.ModuleDeclaration);
+            const declaration = getDeclarationOfKind<ModuleDeclaration>(symbol, SyntaxKind.ModuleDeclaration);
             const isNamespace = declaration && declaration.name && declaration.name.kind === SyntaxKind.Identifier;
             displayParts.push(keywordPart(isNamespace ? SyntaxKind.NamespaceKeyword : SyntaxKind.ModuleKeyword));
             displayParts.push(spacePart());
@@ -272,22 +290,21 @@ namespace ts.SymbolDisplay {
             displayParts.push(punctuationPart(SyntaxKind.CloseParenToken));
             displayParts.push(spacePart());
             addFullSymbolName(symbol);
-            displayParts.push(spacePart());
-            displayParts.push(keywordPart(SyntaxKind.InKeyword));
-            displayParts.push(spacePart());
             if (symbol.parent) {
                 // Class/Interface type parameter
+                addInPrefix();
                 addFullSymbolName(symbol.parent, enclosingDeclaration);
                 writeTypeParametersOfSymbol(symbol.parent, enclosingDeclaration);
             }
             else {
                 // Method/function type parameter
-                let declaration = <Node>getDeclarationOfKind(symbol, SyntaxKind.TypeParameter);
-                Debug.assert(declaration !== undefined);
-                declaration = declaration.parent;
+                const decl = getDeclarationOfKind(symbol, SyntaxKind.TypeParameter);
+                Debug.assert(decl !== undefined);
+                const declaration = decl.parent;
 
                 if (declaration) {
                     if (isFunctionLikeKind(declaration.kind)) {
+                        addInPrefix();
                         const signature = typeChecker.getSignatureFromDeclaration(<SignatureDeclaration>declaration);
                         if (declaration.kind === SyntaxKind.ConstructSignature) {
                             displayParts.push(keywordPart(SyntaxKind.NewKeyword));
@@ -298,10 +315,11 @@ namespace ts.SymbolDisplay {
                         }
                         addRange(displayParts, signatureToDisplayParts(typeChecker, signature, sourceFile, TypeFormatFlags.WriteTypeArgumentsOfSignature));
                     }
-                    else {
+                    else if (declaration.kind === SyntaxKind.TypeAliasDeclaration) {
                         // Type alias type parameter
                         // For example
                         //      type list<T> = T[];  // Both T will go through same code path
+                        addInPrefix();
                         displayParts.push(keywordPart(SyntaxKind.TypeKeyword));
                         displayParts.push(spacePart());
                         addFullSymbolName(declaration.symbol);
@@ -311,6 +329,7 @@ namespace ts.SymbolDisplay {
             }
         }
         if (symbolFlags & SymbolFlags.EnumMember) {
+            symbolKind = ScriptElementKind.enumMemberElement;
             addPrefixForAnyFunctionOrVar(symbol, "enum member");
             const declaration = symbol.declarations[0];
             if (declaration.kind === SyntaxKind.EnumMember) {
@@ -319,7 +338,8 @@ namespace ts.SymbolDisplay {
                     displayParts.push(spacePart());
                     displayParts.push(operatorPart(SyntaxKind.EqualsToken));
                     displayParts.push(spacePart());
-                    displayParts.push(displayPart(constantValue.toString(), SymbolDisplayPartKind.numericLiteral));
+                    displayParts.push(displayPart(getTextOfConstantValue(constantValue),
+                        typeof constantValue === "number" ? SymbolDisplayPartKind.numericLiteral : SymbolDisplayPartKind.stringLiteral));
                 }
             }
         }
@@ -373,6 +393,7 @@ namespace ts.SymbolDisplay {
 
                     // For properties, variables and local vars: show the type
                     if (symbolKind === ScriptElementKind.memberVariableElement ||
+                        symbolKind === ScriptElementKind.jsxAttribute ||
                         symbolFlags & SymbolFlags.Variable ||
                         symbolKind === ScriptElementKind.localVariableElement ||
                         isThisExpression) {
@@ -407,8 +428,9 @@ namespace ts.SymbolDisplay {
 
         if (!documentation) {
             documentation = symbol.getDocumentationComment();
+            tags = symbol.getJsDocTags();
             if (documentation.length === 0 && symbol.flags & SymbolFlags.Property) {
-                // For some special property access expressions like `experts.foo = foo` or `module.exports.foo = foo`
+                // For some special property access expressions like `exports.foo = foo` or `module.exports.foo = foo`
                 // there documentation comments might be attached to the right hand side symbol of their declarations.
                 // The pattern of such special property access is that the parent symbol is the symbol of the file.
                 if (symbol.parent && forEach(symbol.parent.declarations, declaration => declaration.kind === SyntaxKind.SourceFile)) {
@@ -423,6 +445,7 @@ namespace ts.SymbolDisplay {
                         }
 
                         documentation = rhsSymbol.getDocumentationComment();
+                        tags = rhsSymbol.getJsDocTags();
                         if (documentation.length > 0) {
                             break;
                         }
@@ -431,7 +454,7 @@ namespace ts.SymbolDisplay {
             }
         }
 
-        return { displayParts, documentation, symbolKind };
+        return { displayParts, documentation, symbolKind, tags };
 
         function addNewLineIfDisplayPartsExist() {
             if (displayParts.length) {
@@ -439,6 +462,12 @@ namespace ts.SymbolDisplay {
             }
         }
 
+        function addInPrefix() {
+            displayParts.push(spacePart());
+            displayParts.push(keywordPart(SyntaxKind.InKeyword));
+            displayParts.push(spacePart());
+        }
+
         function addFullSymbolName(symbol: Symbol, enclosingDeclaration?: Node) {
             const fullSymbolDisplayParts = symbolToDisplayParts(typeChecker, symbol, enclosingDeclaration || sourceFile, /*meaning*/ undefined,
                 SymbolFormatFlags.WriteTypeParametersOrArguments | SymbolFormatFlags.UseOnlyExternalAliasing);
@@ -483,6 +512,7 @@ namespace ts.SymbolDisplay {
                 displayParts.push(punctuationPart(SyntaxKind.CloseParenToken));
             }
             documentation = signature.getDocumentationComment();
+            tags = signature.getJsDocTags();
         }
 
         function writeTypeParametersOfSymbol(symbol: Symbol, enclosingDeclaration: Node) {
diff --git a/src/services/textChanges.ts b/src/services/textChanges.ts
new file mode 100644
index 0000000..5aa4ebc
--- /dev/null
+++ b/src/services/textChanges.ts
@@ -0,0 +1,658 @@
+/* @internal */
+namespace ts.textChanges {
+
+    /**
+     * Currently for simplicity we store recovered positions on the node itself.
+     * It can be changed to side-table later if we decide that current design is too invasive.
+     */
+    function getPos(n: TextRange) {
+        return (<any>n)["__pos"];
+    }
+
+    function setPos(n: TextRange, pos: number) {
+        (<any>n)["__pos"] = pos;
+    }
+
+    function getEnd(n: TextRange) {
+        return (<any>n)["__end"];
+    }
+
+    function setEnd(n: TextRange, end: number) {
+        (<any>n)["__end"] = end;
+    }
+
+    export interface ConfigurableStart {
+        useNonAdjustedStartPosition?: boolean;
+    }
+    export interface ConfigurableEnd {
+        useNonAdjustedEndPosition?: boolean;
+    }
+
+    export enum Position {
+        FullStart,
+        Start
+    }
+
+    function skipWhitespacesAndLineBreaks(text: string, start: number) {
+        return skipTrivia(text, start, /*stopAfterLineBreak*/ false, /*stopAtComments*/ true);
+    }
+
+    function hasCommentsBeforeLineBreak(text: string, start: number) {
+        let i = start;
+        while (i < text.length) {
+            const ch = text.charCodeAt(i);
+            if (isWhiteSpaceSingleLine(ch)) {
+                i++;
+                continue;
+            }
+            return ch === CharacterCodes.slash;
+        }
+        return false;
+    }
+
+    /**
+     * Usually node.pos points to a position immediately after the previous token.
+     * If this position is used as a beginning of the span to remove - it might lead to removing the trailing trivia of the previous node, i.e:
+     * const x; // this is x
+     *        ^ - pos for the next variable declaration will point here
+     * const y; // this is y
+     *        ^ - end for previous variable declaration
+     * Usually leading trivia of the variable declaration 'y' should not include trailing trivia (whitespace, comment 'this is x' and newline) from the preceding
+     * variable declaration and trailing trivia for 'y' should include (whitespace, comment 'this is y', newline).
+     * By default when removing nodes we adjust start and end positions to respect specification of the trivia above.
+     * If pos\end should be interpreted literally 'useNonAdjustedStartPosition' or 'useNonAdjustedEndPosition' should be set to true
+     */
+    export type ConfigurableStartEnd = ConfigurableStart & ConfigurableEnd;
+
+    export interface InsertNodeOptions {
+        /**
+         * Text to be inserted before the new node
+         */
+        prefix?: string;
+        /**
+         * Text to be inserted after the new node
+         */
+        suffix?: string;
+        /**
+         * Text of inserted node will be formatted with this indentation, otherwise indentation will be inferred from the old node
+         */
+        indentation?: number;
+        /**
+         * Text of inserted node will be formatted with this delta, otherwise delta will be inferred from the new node kind
+         */
+        delta?: number;
+    }
+
+    export type ChangeNodeOptions = ConfigurableStartEnd & InsertNodeOptions;
+
+    interface Change {
+        readonly sourceFile: SourceFile;
+        readonly range: TextRange;
+        readonly useIndentationFromFile?: boolean;
+        readonly node?: Node;
+        readonly options?: ChangeNodeOptions;
+    }
+
+    export function getSeparatorCharacter(separator: Token<SyntaxKind.CommaToken | SyntaxKind.SemicolonToken>) {
+        return tokenToString(separator.kind);
+    }
+
+    export function getAdjustedStartPosition(sourceFile: SourceFile, node: Node, options: ConfigurableStart, position: Position) {
+        if (options.useNonAdjustedStartPosition) {
+            return node.getFullStart();
+        }
+        const fullStart = node.getFullStart();
+        const start = node.getStart(sourceFile);
+        if (fullStart === start) {
+            return start;
+        }
+        const fullStartLine = getLineStartPositionForPosition(fullStart, sourceFile);
+        const startLine = getLineStartPositionForPosition(start, sourceFile);
+        if (startLine === fullStartLine) {
+            // full start and start of the node are on the same line
+            //   a,     b;
+            //    ^     ^
+            //    |   start
+            // fullstart
+            // when b is replaced - we usually want to keep the leading trvia
+            // when b is deleted - we delete it
+            return position === Position.Start ? start : fullStart;
+        }
+        // get start position of the line following the line that contains fullstart position
+        let adjustedStartPosition = getStartPositionOfLine(getLineOfLocalPosition(sourceFile, fullStartLine) + 1, sourceFile);
+        // skip whitespaces/newlines
+        adjustedStartPosition = skipWhitespacesAndLineBreaks(sourceFile.text, adjustedStartPosition);
+        return getStartPositionOfLine(getLineOfLocalPosition(sourceFile, adjustedStartPosition), sourceFile);
+    }
+
+    export function getAdjustedEndPosition(sourceFile: SourceFile, node: Node, options: ConfigurableEnd) {
+        if (options.useNonAdjustedEndPosition) {
+            return node.getEnd();
+        }
+        const end = node.getEnd();
+        const newEnd = skipTrivia(sourceFile.text, end, /*stopAfterLineBreak*/ true);
+        // check if last character before newPos is linebreak
+        // if yes - considered all skipped trivia to be trailing trivia of the node
+        return newEnd !== end && isLineBreak(sourceFile.text.charCodeAt(newEnd - 1))
+            ? newEnd
+            : end;
+    }
+
+    /**
+     * Checks if 'candidate' argument is a legal separator in the list that contains 'node' as an element
+     */
+    function isSeparator(node: Node, candidate: Node): candidate is Token<SyntaxKind.CommaToken | SyntaxKind.SemicolonToken> {
+        return candidate && node.parent && (candidate.kind === SyntaxKind.CommaToken || (candidate.kind === SyntaxKind.SemicolonToken && node.parent.kind === SyntaxKind.ObjectLiteralExpression));
+    }
+
+    function spaces(count: number) {
+        let s = "";
+        for (let i = 0; i < count; i++) {
+            s += " ";
+        }
+        return s;
+    }
+
+    export class ChangeTracker {
+        private changes: Change[] = [];
+        private readonly newLineCharacter: string;
+
+        public static fromCodeFixContext(context: { newLineCharacter: string, rulesProvider: formatting.RulesProvider }) {
+            return new ChangeTracker(context.newLineCharacter === "\n" ? NewLineKind.LineFeed : NewLineKind.CarriageReturnLineFeed, context.rulesProvider);
+        }
+
+        constructor(
+            private readonly newLine: NewLineKind,
+            private readonly rulesProvider: formatting.RulesProvider,
+            private readonly validator?: (text: NonFormattedText) => void) {
+            this.newLineCharacter = getNewLineCharacter({ newLine });
+        }
+
+        public deleteNode(sourceFile: SourceFile, node: Node, options: ConfigurableStartEnd = {}) {
+            const startPosition = getAdjustedStartPosition(sourceFile, node, options, Position.FullStart);
+            const endPosition = getAdjustedEndPosition(sourceFile, node, options);
+            this.changes.push({ sourceFile, options, range: { pos: startPosition, end: endPosition } });
+            return this;
+        }
+
+        public deleteRange(sourceFile: SourceFile, range: TextRange) {
+            this.changes.push({ sourceFile, range });
+            return this;
+        }
+
+        public deleteNodeRange(sourceFile: SourceFile, startNode: Node, endNode: Node, options: ConfigurableStartEnd = {}) {
+            const startPosition = getAdjustedStartPosition(sourceFile, startNode, options, Position.FullStart);
+            const endPosition = getAdjustedEndPosition(sourceFile, endNode, options);
+            this.changes.push({ sourceFile, options, range: { pos: startPosition, end: endPosition } });
+            return this;
+        }
+
+        public deleteNodeInList(sourceFile: SourceFile, node: Node) {
+            const containingList = formatting.SmartIndenter.getContainingList(node, sourceFile);
+            if (!containingList) {
+                Debug.fail("node is not a list element");
+                return this;
+            }
+            const index = containingList.indexOf(node);
+            if (index < 0) {
+                return this;
+            }
+            if (containingList.length === 1) {
+                this.deleteNode(sourceFile, node);
+                return this;
+            }
+            if (index !== containingList.length - 1) {
+                const nextToken = getTokenAtPosition(sourceFile, node.end, /*includeJsDocComment*/ false);
+                if (nextToken && isSeparator(node, nextToken)) {
+                    // find first non-whitespace position in the leading trivia of the node
+                    const startPosition = skipTrivia(sourceFile.text, getAdjustedStartPosition(sourceFile, node, {}, Position.FullStart), /*stopAfterLineBreak*/ false, /*stopAtComments*/ true);
+                    const nextElement = containingList[index + 1];
+                    /// find first non-whitespace position in the leading trivia of the next node
+                    const endPosition = skipTrivia(sourceFile.text, getAdjustedStartPosition(sourceFile, nextElement, {}, Position.FullStart), /*stopAfterLineBreak*/ false, /*stopAtComments*/ true);
+                    // shift next node so its first non-whitespace position will be moved to the first non-whitespace position of the deleted node
+                    this.deleteRange(sourceFile, { pos: startPosition, end: endPosition });
+                }
+            }
+            else {
+                const previousToken = getTokenAtPosition(sourceFile, containingList[index - 1].end, /*includeJsDocComment*/ false);
+                if (previousToken && isSeparator(node, previousToken)) {
+                    this.deleteNodeRange(sourceFile, previousToken, node);
+                }
+            }
+            return this;
+        }
+
+        public replaceRange(sourceFile: SourceFile, range: TextRange, newNode: Node, options: InsertNodeOptions = {}) {
+            this.changes.push({ sourceFile, range, options, node: newNode });
+            return this;
+        }
+
+        public replaceNode(sourceFile: SourceFile, oldNode: Node, newNode: Node, options: ChangeNodeOptions = {}) {
+            const startPosition = getAdjustedStartPosition(sourceFile, oldNode, options, Position.Start);
+            const endPosition = getAdjustedEndPosition(sourceFile, oldNode, options);
+            this.changes.push({ sourceFile, options, useIndentationFromFile: true, node: newNode, range: { pos: startPosition, end: endPosition } });
+            return this;
+        }
+
+        public replaceNodeRange(sourceFile: SourceFile, startNode: Node, endNode: Node, newNode: Node, options: ChangeNodeOptions = {}) {
+            const startPosition = getAdjustedStartPosition(sourceFile, startNode, options, Position.Start);
+            const endPosition = getAdjustedEndPosition(sourceFile, endNode, options);
+            this.changes.push({ sourceFile, options, useIndentationFromFile: true, node: newNode, range: { pos: startPosition, end: endPosition } });
+            return this;
+        }
+
+        public insertNodeAt(sourceFile: SourceFile, pos: number, newNode: Node, options: InsertNodeOptions = {}) {
+            this.changes.push({ sourceFile, options, node: newNode, range: { pos: pos, end: pos } });
+            return this;
+        }
+
+        public insertNodeBefore(sourceFile: SourceFile, before: Node, newNode: Node, options: InsertNodeOptions & ConfigurableStart = {}) {
+            const startPosition = getAdjustedStartPosition(sourceFile, before, options, Position.Start);
+            this.changes.push({ sourceFile, options, useIndentationFromFile: true, node: newNode, range: { pos: startPosition, end: startPosition } });
+            return this;
+        }
+
+        public insertNodeAfter(sourceFile: SourceFile, after: Node, newNode: Node, options: InsertNodeOptions & ConfigurableEnd = {}) {
+            if ((isStatementButNotDeclaration(after)) ||
+                after.kind === SyntaxKind.PropertyDeclaration ||
+                after.kind === SyntaxKind.PropertySignature ||
+                after.kind === SyntaxKind.MethodSignature) {
+                // check if previous statement ends with semicolon
+                // if not - insert semicolon to preserve the code from changing the meaning due to ASI
+                if (sourceFile.text.charCodeAt(after.end - 1) !== CharacterCodes.semicolon) {
+                    this.changes.push({
+                        sourceFile,
+                        options: {},
+                        range: { pos: after.end, end: after.end },
+                        node: createToken(SyntaxKind.SemicolonToken)
+                    });
+                }
+            }
+            const endPosition = getAdjustedEndPosition(sourceFile, after, options);
+            this.changes.push({ sourceFile, options, useIndentationFromFile: true, node: newNode, range: { pos: endPosition, end: endPosition } });
+            return this;
+        }
+
+        /**
+         * This function should be used to insert nodes in lists when nodes don't carry separators as the part of the node range,
+         * i.e. arguments in arguments lists, parameters in parameter lists etc.
+         * Note that separators are part of the node in statements and class elements.
+         */
+        public insertNodeInListAfter(sourceFile: SourceFile, after: Node, newNode: Node) {
+            const containingList = formatting.SmartIndenter.getContainingList(after, sourceFile);
+            if (!containingList) {
+                Debug.fail("node is not a list element");
+                return this;
+            }
+            const index = containingList.indexOf(after);
+            if (index < 0) {
+                return this;
+            }
+            const end = after.getEnd();
+            if (index !== containingList.length - 1) {
+                // any element except the last one
+                // use next sibling as an anchor
+                const nextToken = getTokenAtPosition(sourceFile, after.end, /*includeJsDocComment*/ false);
+                if (nextToken && isSeparator(after, nextToken)) {
+                    // for list
+                    // a, b, c
+                    // create change for adding 'e' after 'a' as
+                    // - find start of next element after a (it is b)
+                    // - use this start as start and end position in final change
+                    // - build text of change by formatting the text of node + separator + whitespace trivia of b
+
+                    // in multiline case it will work as
+                    //   a,
+                    //   b,
+                    //   c,
+                    // result - '*' denotes leading trivia that will be inserted after new text (displayed as '#')
+                    //   a,*
+                    // ***insertedtext<separator>#
+                    // ###b,
+                    //   c,
+                    // find line and character of the next element
+                    const lineAndCharOfNextElement = getLineAndCharacterOfPosition(sourceFile, skipWhitespacesAndLineBreaks(sourceFile.text, containingList[index + 1].getFullStart()));
+                    // find line and character of the token that precedes next element (usually it is separator)
+                    const lineAndCharOfNextToken = getLineAndCharacterOfPosition(sourceFile, nextToken.end);
+                    let prefix: string;
+                    let startPos: number;
+                    if (lineAndCharOfNextToken.line === lineAndCharOfNextElement.line) {
+                        // next element is located on the same line with separator:
+                        // a,$$$$b
+                        //  ^    ^
+                        //  |    |-next element
+                        //  |-separator
+                        // where $$$ is some leading trivia
+                        // for a newly inserted node we'll maintain the same relative position comparing to separator and replace leading trivia with spaces
+                        // a,    x,$$$$b
+                        //  ^    ^     ^
+                        //  |    |     |-next element
+                        //  |    |-new inserted node padded with spaces
+                        //  |-separator
+                        startPos = nextToken.end;
+                        prefix = spaces(lineAndCharOfNextElement.character - lineAndCharOfNextToken.character);
+                    }
+                    else {
+                        // next element is located on different line that separator
+                        // let insert position be the beginning of the line that contains next element
+                        startPos = getStartPositionOfLine(lineAndCharOfNextElement.line, sourceFile);
+                    }
+
+                    this.changes.push({
+                        sourceFile,
+                        range: { pos: startPos, end: containingList[index + 1].getStart(sourceFile) },
+                        node: newNode,
+                        useIndentationFromFile: true,
+                        options: {
+                            prefix,
+                            // write separator and leading trivia of the next element as suffix
+                            suffix: `${tokenToString(nextToken.kind)}${sourceFile.text.substring(nextToken.end, containingList[index + 1].getStart(sourceFile))}`
+                        }
+                    });
+                }
+            }
+            else {
+                const afterStart = after.getStart(sourceFile);
+                const afterStartLinePosition = getLineStartPositionForPosition(afterStart, sourceFile);
+
+                let separator: SyntaxKind.CommaToken | SyntaxKind.SemicolonToken;
+                let multilineList = false;
+
+                // insert element after the last element in the list that has more than one item
+                // pick the element preceding the after element to:
+                // - pick the separator
+                // - determine if list is a multiline
+                if (containingList.length === 1) {
+                    // if list has only one element then we'll format is as multiline if node has comment in trailing trivia, or as singleline otherwise
+                    // i.e. var x = 1 // this is x
+                    //     | new element will be inserted at this position
+                    separator = SyntaxKind.CommaToken;
+                }
+                else {
+                    // element has more than one element, pick separator from the list
+                    const tokenBeforeInsertPosition = findPrecedingToken(after.pos, sourceFile);
+                    separator = isSeparator(after, tokenBeforeInsertPosition) ? tokenBeforeInsertPosition.kind : SyntaxKind.CommaToken;
+                    // determine if list is multiline by checking lines of after element and element that precedes it.
+                    const afterMinusOneStartLinePosition = getLineStartPositionForPosition(containingList[index - 1].getStart(sourceFile), sourceFile);
+                    multilineList = afterMinusOneStartLinePosition !== afterStartLinePosition;
+                }
+                if (hasCommentsBeforeLineBreak(sourceFile.text, after.end)) {
+                    // in this case we'll always treat containing list as multiline
+                    multilineList = true;
+                }
+                if (multilineList) {
+                    // insert separator immediately following the 'after' node to preserve comments in trailing trivia
+                    this.changes.push({
+                        sourceFile,
+                        range: { pos: end, end },
+                        node: createToken(separator),
+                        options: {}
+                    });
+                    // use the same indentation as 'after' item
+                    const indentation = formatting.SmartIndenter.findFirstNonWhitespaceColumn(afterStartLinePosition, afterStart, sourceFile, this.rulesProvider.getFormatOptions());
+                    // insert element before the line break on the line that contains 'after' element
+                    let insertPos = skipTrivia(sourceFile.text, end, /*stopAfterLineBreak*/ true, /*stopAtComments*/ false);
+                    if (insertPos !== end && isLineBreak(sourceFile.text.charCodeAt(insertPos - 1))) {
+                        insertPos--;
+                    }
+                    this.changes.push({
+                        sourceFile,
+                        range: { pos: insertPos, end: insertPos },
+                        node: newNode,
+                        options: { indentation, prefix: this.newLineCharacter }
+                    });
+                }
+                else {
+                    this.changes.push({
+                        sourceFile,
+                        range: { pos: end, end },
+                        node: newNode,
+                        options: { prefix: `${tokenToString(separator)} ` }
+                    });
+                }
+            }
+            return this;
+        }
+
+        public getChanges(): FileTextChanges[] {
+            const changesPerFile = createFileMap<Change[]>();
+            // group changes per file
+            for (const c of this.changes) {
+                let changesInFile = changesPerFile.get(c.sourceFile.path);
+                if (!changesInFile) {
+                    changesPerFile.set(c.sourceFile.path, changesInFile = []);
+                }
+                changesInFile.push(c);
+            }
+            // convert changes
+            const fileChangesList: FileTextChanges[] = [];
+            changesPerFile.forEachValue(path => {
+                const changesInFile = changesPerFile.get(path);
+                const sourceFile = changesInFile[0].sourceFile;
+                const fileTextChanges: FileTextChanges = { fileName: sourceFile.fileName, textChanges: [] };
+                for (const c of ChangeTracker.normalize(changesInFile)) {
+                    fileTextChanges.textChanges.push({
+                        span: this.computeSpan(c, sourceFile),
+                        newText: this.computeNewText(c, sourceFile)
+                    });
+                }
+                fileChangesList.push(fileTextChanges);
+            });
+
+            return fileChangesList;
+        }
+
+        private computeSpan(change: Change, _sourceFile: SourceFile): TextSpan {
+            return createTextSpanFromBounds(change.range.pos, change.range.end);
+        }
+
+        private computeNewText(change: Change, sourceFile: SourceFile): string {
+            if (!change.node) {
+                // deletion case
+                return "";
+            }
+            const options = change.options || {};
+            const nonFormattedText = getNonformattedText(change.node, sourceFile, this.newLine);
+            if (this.validator) {
+                this.validator(nonFormattedText);
+            }
+
+            const formatOptions = this.rulesProvider.getFormatOptions();
+            const pos = change.range.pos;
+            const posStartsLine = getLineStartPositionForPosition(pos, sourceFile) === pos;
+
+            const initialIndentation =
+                change.options.indentation !== undefined
+                    ? change.options.indentation
+                    : change.useIndentationFromFile
+                        ? formatting.SmartIndenter.getIndentation(change.range.pos, sourceFile, formatOptions, posStartsLine || (change.options.prefix === this.newLineCharacter))
+                        : 0;
+            const delta =
+                change.options.delta !== undefined
+                    ? change.options.delta
+                    : formatting.SmartIndenter.shouldIndentChildNode(change.node)
+                        ? formatOptions.indentSize
+                        : 0;
+
+            let text = applyFormatting(nonFormattedText, sourceFile, initialIndentation, delta, this.rulesProvider);
+            // strip initial indentation (spaces or tabs) if text will be inserted in the middle of the line
+            // however keep indentation if it is was forced
+            text = posStartsLine || change.options.indentation !== undefined ? text : text.replace(/^\s+/, "");
+            return (options.prefix || "") + text + (options.suffix || "");
+        }
+
+        private static normalize(changes: Change[]): Change[] {
+            // order changes by start position
+            const normalized = stableSort(changes, (a, b) => a.range.pos - b.range.pos);
+            // verify that change intervals do not overlap, except possibly at end points.
+            for (let i = 0; i < normalized.length - 2; i++) {
+                Debug.assert(normalized[i].range.end <= normalized[i + 1].range.pos);
+            }
+            return normalized;
+        }
+    }
+
+    export interface NonFormattedText {
+        readonly text: string;
+        readonly node: Node;
+    }
+
+    export function getNonformattedText(node: Node, sourceFile: SourceFile | undefined, newLine: NewLineKind): NonFormattedText {
+        const options = { newLine, target: sourceFile && sourceFile.languageVersion };
+        const writer = new Writer(getNewLineCharacter(options));
+        const printer = createPrinter(options, writer);
+        printer.writeNode(EmitHint.Unspecified, node, sourceFile, writer);
+        return { text: writer.getText(), node: assignPositionsToNode(node) };
+    }
+
+    export function applyFormatting(nonFormattedText: NonFormattedText, sourceFile: SourceFile, initialIndentation: number, delta: number, rulesProvider: formatting.RulesProvider) {
+        const lineMap = computeLineStarts(nonFormattedText.text);
+        const file: SourceFileLike = {
+            text: nonFormattedText.text,
+            lineMap,
+            getLineAndCharacterOfPosition: pos => computeLineAndCharacterOfPosition(lineMap, pos)
+        };
+        const changes = formatting.formatNode(nonFormattedText.node, file, sourceFile.languageVariant, initialIndentation, delta, rulesProvider);
+        return applyChanges(nonFormattedText.text, changes);
+    }
+
+    export function applyChanges(text: string, changes: TextChange[]): string {
+        for (let i = changes.length - 1; i >= 0; i--) {
+            const change = changes[i];
+            text = `${text.substring(0, change.span.start)}${change.newText}${text.substring(textSpanEnd(change.span))}`;
+        }
+        return text;
+    }
+
+    function isTrivia(s: string) {
+        return skipTrivia(s, 0) === s.length;
+    }
+
+    function assignPositionsToNode(node: Node): Node {
+        const visited = visitEachChild(node, assignPositionsToNode, nullTransformationContext, assignPositionsToNodeArray, assignPositionsToNode);
+        // create proxy node for non synthesized nodes
+        const newNode = nodeIsSynthesized(visited)
+            ? visited
+            : (Proxy.prototype = visited, new (<any>Proxy)());
+        newNode.pos = getPos(node);
+        newNode.end = getEnd(node);
+        return newNode;
+
+        function Proxy() { }
+    }
+
+    function assignPositionsToNodeArray(nodes: NodeArray<any>, visitor: Visitor, test?: (node: Node) => boolean, start?: number, count?: number) {
+        const visited = visitNodes(nodes, visitor, test, start, count);
+        if (!visited) {
+            return visited;
+        }
+        // clone nodearray if necessary
+        const nodeArray = visited === nodes ? createNodeArray(visited.slice(0)) : visited;
+        nodeArray.pos = getPos(nodes);
+        nodeArray.end = getEnd(nodes);
+        return nodeArray;
+    }
+
+    class Writer implements EmitTextWriter, PrintHandlers {
+        private lastNonTriviaPosition = 0;
+        private readonly writer: EmitTextWriter;
+
+        public readonly onEmitNode: PrintHandlers["onEmitNode"];
+        public readonly onBeforeEmitNodeArray: PrintHandlers["onBeforeEmitNodeArray"];
+        public readonly onAfterEmitNodeArray: PrintHandlers["onAfterEmitNodeArray"];
+        public readonly onBeforeEmitToken: PrintHandlers["onBeforeEmitToken"];
+        public readonly onAfterEmitToken: PrintHandlers["onAfterEmitToken"];
+
+        constructor(newLine: string) {
+            this.writer = createTextWriter(newLine);
+            this.onEmitNode = (hint, node, printCallback) => {
+                if (node) {
+                    setPos(node, this.lastNonTriviaPosition);
+                }
+                printCallback(hint, node);
+                if (node) {
+                    setEnd(node, this.lastNonTriviaPosition);
+                }
+            };
+            this.onBeforeEmitNodeArray = nodes => {
+                if (nodes) {
+                    setPos(nodes, this.lastNonTriviaPosition);
+                }
+            };
+            this.onAfterEmitNodeArray = nodes => {
+                if (nodes) {
+                    setEnd(nodes, this.lastNonTriviaPosition);
+                }
+            };
+            this.onBeforeEmitToken = node => {
+                if (node) {
+                    setPos(node, this.lastNonTriviaPosition);
+                }
+            };
+            this.onAfterEmitToken = node => {
+                if (node) {
+                    setEnd(node, this.lastNonTriviaPosition);
+                }
+            };
+        }
+
+        private setLastNonTriviaPosition(s: string, force: boolean) {
+            if (force || !isTrivia(s)) {
+                this.lastNonTriviaPosition = this.writer.getTextPos();
+                let i = 0;
+                while (isWhiteSpaceLike(s.charCodeAt(s.length - i - 1))) {
+                    i++;
+                }
+                // trim trailing whitespaces
+                this.lastNonTriviaPosition -= i;
+            }
+        }
+
+        write(s: string): void {
+            this.writer.write(s);
+            this.setLastNonTriviaPosition(s, /*force*/ false);
+        }
+        writeTextOfNode(text: string, node: Node): void {
+            this.writer.writeTextOfNode(text, node);
+        }
+        writeLine(): void {
+            this.writer.writeLine();
+        }
+        increaseIndent(): void {
+            this.writer.increaseIndent();
+        }
+        decreaseIndent(): void {
+            this.writer.decreaseIndent();
+        }
+        getText(): string {
+            return this.writer.getText();
+        }
+        rawWrite(s: string): void {
+            this.writer.rawWrite(s);
+            this.setLastNonTriviaPosition(s, /*force*/ false);
+        }
+        writeLiteral(s: string): void {
+            this.writer.writeLiteral(s);
+            this.setLastNonTriviaPosition(s, /*force*/ true);
+        }
+        getTextPos(): number {
+            return this.writer.getTextPos();
+        }
+        getLine(): number {
+            return this.writer.getLine();
+        }
+        getColumn(): number {
+            return this.writer.getColumn();
+        }
+        getIndent(): number {
+            return this.writer.getIndent();
+        }
+        isAtStartOfLine(): boolean {
+            return this.writer.isAtStartOfLine();
+        }
+        reset(): void {
+            this.writer.reset();
+            this.lastNonTriviaPosition = 0;
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/services/transform.ts b/src/services/transform.ts
new file mode 100644
index 0000000..07fc3c7
--- /dev/null
+++ b/src/services/transform.ts
@@ -0,0 +1,18 @@
+/// <reference path="..\compiler\transformer.ts"/>
+/// <reference path="transpile.ts"/>
+namespace ts {
+    /**
+     * Transform one or more nodes using the supplied transformers.
+     * @param source A single `Node` or an array of `Node` objects.
+     * @param transformers An array of `TransformerFactory` callbacks used to process the transformation.
+     * @param compilerOptions Optional compiler options.
+     */
+    export function transform<T extends Node>(source: T | T[], transformers: TransformerFactory<T>[], compilerOptions?: CompilerOptions) {
+        const diagnostics: Diagnostic[] = [];
+        compilerOptions = fixupCompilerOptions(compilerOptions, diagnostics);
+        const nodes = isArray(source) ? source : [source];
+        const result = transformNodes(/*resolver*/ undefined, /*emitHost*/ undefined, compilerOptions, nodes, transformers, /*allowDtsFiles*/ true);
+        result.diagnostics = concatenate(result.diagnostics, diagnostics);
+        return result;
+    }
+}
\ No newline at end of file
diff --git a/src/services/transpile.ts b/src/services/transpile.ts
index 303ca0d..561c188 100644
--- a/src/services/transpile.ts
+++ b/src/services/transpile.ts
@@ -5,6 +5,7 @@ namespace ts {
         reportDiagnostics?: boolean;
         moduleName?: string;
         renamedDependencies?: MapLike<string>;
+        transformers?: CustomTransformers;
     }
 
     export interface TranspileOutput {
@@ -63,7 +64,7 @@ namespace ts {
         }
 
         if (transpileOptions.renamedDependencies) {
-            sourceFile.renamedDependencies = createMap(transpileOptions.renamedDependencies);
+            sourceFile.renamedDependencies = createMapFromTemplate(transpileOptions.renamedDependencies);
         }
 
         const newLine = getNewLineCharacter(options);
@@ -74,8 +75,8 @@ namespace ts {
 
         // Create a compilerHost object to allow the compiler to read and write files
         const compilerHost: CompilerHost = {
-            getSourceFile: (fileName, target) => fileName === normalizePath(inputFileName) ? sourceFile : undefined,
-            writeFile: (name, text, writeByteOrderMark) => {
+            getSourceFile: (fileName) => fileName === normalizePath(inputFileName) ? sourceFile : undefined,
+            writeFile: (name, text) => {
                 if (fileExtensionIs(name, ".map")) {
                     Debug.assert(sourceMapText === undefined, `Unexpected multiple source map outputs for the file '${name}'`);
                     sourceMapText = text;
@@ -91,9 +92,9 @@ namespace ts {
             getCurrentDirectory: () => "",
             getNewLine: () => newLine,
             fileExists: (fileName): boolean => fileName === inputFileName,
-            readFile: (fileName): string => "",
-            directoryExists: directoryExists => true,
-            getDirectories: (path: string) => []
+            readFile: () => "",
+            directoryExists: () => true,
+            getDirectories: () => []
         };
 
         const program = createProgram([inputFileName], options, compilerHost);
@@ -103,7 +104,7 @@ namespace ts {
             addRange(/*to*/ diagnostics, /*from*/ program.getOptionsDiagnostics());
         }
         // Emit
-        program.emit();
+        program.emit(/*targetSourceFile*/ undefined, /*writeFile*/ undefined, /*cancellationToken*/ undefined, /*emitOnlyDtsFiles*/ undefined, transpileOptions.transformers);
 
         Debug.assert(outputText !== undefined, "Output generation failed");
 
@@ -123,12 +124,13 @@ namespace ts {
     let commandLineOptionsStringToEnum: CommandLineOptionOfCustomType[];
 
     /** JS users may pass in string values for enum compiler options (such as ModuleKind), so convert. */
-    function fixupCompilerOptions(options: CompilerOptions, diagnostics: Diagnostic[]): CompilerOptions {
+    /*@internal*/
+    export function fixupCompilerOptions(options: CompilerOptions, diagnostics: Diagnostic[]): CompilerOptions {
         // Lazily create this value to fix module loading errors.
         commandLineOptionsStringToEnum = commandLineOptionsStringToEnum || <CommandLineOptionOfCustomType[]>filter(optionDeclarations, o =>
-            typeof o.type === "object" && !forEachProperty(o.type, v => typeof v !== "number"));
+            typeof o.type === "object" && !forEachEntry(o.type, v => typeof v !== "number"));
 
-        options = clone(options);
+        options = cloneCompilerOptions(options);
 
         for (const opt of commandLineOptionsStringToEnum) {
             if (!hasProperty(options, opt.name)) {
@@ -142,7 +144,7 @@ namespace ts {
                 options[opt.name] = parseCustomTypeOption(opt, value, diagnostics);
             }
             else {
-                if (!forEachProperty(opt.type, v => v === value)) {
+                if (!forEachEntry(opt.type, v => v === value)) {
                     // Supplied value isn't a valid enum value.
                     diagnostics.push(createCompilerDiagnosticForInvalidCustomType(opt));
                 }
diff --git a/src/services/types.ts b/src/services/types.ts
index 874d96f..2d47da2 100644
--- a/src/services/types.ts
+++ b/src/services/types.ts
@@ -4,7 +4,11 @@ namespace ts {
         getChildCount(sourceFile?: SourceFile): number;
         getChildAt(index: number, sourceFile?: SourceFile): Node;
         getChildren(sourceFile?: SourceFile): Node[];
+        /* @internal */
+        getChildren(sourceFile?: SourceFileLike): Node[];
         getStart(sourceFile?: SourceFile, includeJsDocComment?: boolean): number;
+        /* @internal */
+        getStart(sourceFile?: SourceFileLike, includeJsDocComment?: boolean): number;
         getFullStart(): number;
         getEnd(): number;
         getWidth(sourceFile?: SourceFile): number;
@@ -14,35 +18,39 @@ namespace ts {
         getText(sourceFile?: SourceFile): string;
         getFirstToken(sourceFile?: SourceFile): Node;
         getLastToken(sourceFile?: SourceFile): Node;
+        // See ts.forEachChild for documentation.
+        forEachChild<T>(cbNode: (node: Node) => T | undefined, cbNodeArray?: (nodes: NodeArray<Node>) => T | undefined): T | undefined;
     }
 
     export interface Symbol {
         getFlags(): SymbolFlags;
         getName(): string;
-        getDeclarations(): Declaration[];
+        getDeclarations(): Declaration[] | undefined;
         getDocumentationComment(): SymbolDisplayPart[];
+        getJsDocTags(): JSDocTagInfo[];
     }
 
     export interface Type {
         getFlags(): TypeFlags;
-        getSymbol(): Symbol;
+        getSymbol(): Symbol | undefined;
         getProperties(): Symbol[];
-        getProperty(propertyName: string): Symbol;
+        getProperty(propertyName: string): Symbol | undefined;
         getApparentProperties(): Symbol[];
         getCallSignatures(): Signature[];
         getConstructSignatures(): Signature[];
-        getStringIndexType(): Type;
-        getNumberIndexType(): Type;
-        getBaseTypes(): ObjectType[];
+        getStringIndexType(): Type | undefined;
+        getNumberIndexType(): Type | undefined;
+        getBaseTypes(): BaseType[] | undefined;
         getNonNullableType(): Type;
     }
 
     export interface Signature {
         getDeclaration(): SignatureDeclaration;
-        getTypeParameters(): Type[];
+        getTypeParameters(): TypeParameter[] | undefined;
         getParameters(): Symbol[];
         getReturnType(): Type;
         getDocumentationComment(): SymbolDisplayPart[];
+        getJsDocTags(): JSDocTagInfo[];
     }
 
     export interface SourceFile {
@@ -53,11 +61,20 @@ namespace ts {
         /* @internal */ getNamedDeclarations(): Map<Declaration[]>;
 
         getLineAndCharacterOfPosition(pos: number): LineAndCharacter;
+        getLineEndOfPosition(pos: number): number;
         getLineStarts(): number[];
         getPositionOfLineAndCharacter(line: number, character: number): number;
         update(newText: string, textChangeRange: TextChangeRange): SourceFile;
     }
 
+    export interface SourceFileLike {
+        getLineAndCharacterOfPosition(pos: number): LineAndCharacter;
+    }
+
+    export interface SourceMapSource {
+        getLineAndCharacterOfPosition(pos: number): LineAndCharacter;
+    }
+
     /**
      * Represents an immutable snapshot of a script at a specified time.Once acquired, the
      * snapshot is observably immutable. i.e. the same calls with the same parameters will return
@@ -90,14 +107,16 @@ namespace ts {
             }
 
             public getText(start: number, end: number): string {
-                return this.text.substring(start, end);
+                return start === 0 && end === this.text.length
+                    ? this.text
+                    : this.text.substring(start, end);
             }
 
             public getLength(): number {
                 return this.text.length;
             }
 
-            public getChangeRange(oldSnapshot: IScriptSnapshot): TextChangeRange {
+            public getChangeRange(): TextChangeRange {
                 // Text-based snapshots do not support incremental parsing. Return undefined
                 // to signal that to the caller.
                 return undefined;
@@ -167,6 +186,11 @@ namespace ts {
          * completions will not be provided
          */
         getDirectories?(directoryName: string): string[];
+
+        /**
+         * Gets a set of custom transformers to use during emit.
+         */
+        getCustomTransformers?(): CustomTransformers | undefined;
     }
 
     //
@@ -225,6 +249,7 @@ namespace ts {
 
         getNavigateToItems(searchValue: string, maxResultCount?: number, fileName?: string, excludeDtsFiles?: boolean): NavigateToItem[];
         getNavigationBarItems(fileName: string): NavigationBarItem[];
+        getNavigationTree(fileName: string): NavigationTree;
 
         getOutliningSpans(fileName: string): OutliningSpan[];
         getTodoComments(fileName: string, descriptors: TodoCommentDescriptor[]): TodoComment[];
@@ -239,6 +264,11 @@ namespace ts {
 
         isValidBraceCompletionAtPosition(fileName: string, position: number, openingBrace: number): boolean;
 
+        getCodeFixesAtPosition(fileName: string, start: number, end: number, errorCodes: number[], formatOptions: FormatCodeSettings): CodeAction[];
+
+        getApplicableRefactors(fileName: string, positionOrRaneg: number | TextRange): ApplicableRefactorInfo[];
+        getEditsForRefactor(fileName: string, formatOptions: FormatCodeSettings, positionOrRange: number | TextRange, refactorName: string, actionName: string): RefactorEditInfo | undefined;
+
         getEmitOutput(fileName: string, emitOnlyDtsFiles?: boolean): EmitOutput;
 
         getProgram(): Program;
@@ -261,12 +291,18 @@ namespace ts {
 
     export interface ClassifiedSpan {
         textSpan: TextSpan;
-        classificationType: string; // ClassificationTypeNames
+        classificationType: ClassificationTypeNames;
     }
 
+    /**
+     * Navigation bar interface designed for visual studio's dual-column layout.
+     * This does not form a proper tree.
+     * The navbar is returned as a list of top-level items, each of which has a list of child items.
+     * Child items always have an empty array for their `childItems`.
+     */
     export interface NavigationBarItem {
         text: string;
-        kind: string;
+        kind: ScriptElementKind;
         kindModifiers: string;
         spans: TextSpan[];
         childItems: NavigationBarItem[];
@@ -275,6 +311,25 @@ namespace ts {
         grayed: boolean;
     }
 
+    /**
+     * Node in a tree of nested declarations in a file.
+     * The top node is always a script or module node.
+     */
+    export interface NavigationTree {
+        /** Name of the declaration, or a short description, e.g. "<class>". */
+        text: string;
+        kind: ScriptElementKind;
+        /** ScriptElementKindModifier separated by commas, e.g. "public,abstract" */
+        kindModifiers: string;
+        /**
+         * Spans of the nodes that generated this declaration.
+         * There will be more than one if this is the result of merging.
+         */
+        spans: TextSpan[];
+        /** Present if non-empty */
+        childItems?: NavigationTree[];
+    }
+
     export interface TodoCommentDescriptor {
         text: string;
         priority: number;
@@ -291,27 +346,95 @@ namespace ts {
         newText: string;
     }
 
+    export interface FileTextChanges {
+        fileName: string;
+        textChanges: TextChange[];
+    }
+
+    export interface CodeAction {
+        /** Description of the code action to display in the UI of the editor */
+        description: string;
+        /** Text changes to apply to each file as part of the code action */
+        changes: FileTextChanges[];
+    }
+
+    /**
+     * A set of one or more available refactoring actions, grouped under a parent refactoring.
+     */
+    export interface ApplicableRefactorInfo {
+        /**
+         * The programmatic name of the refactoring
+         */
+        name: string;
+        /**
+         * A description of this refactoring category to show to the user.
+         * If the refactoring gets inlined (see below), this text will not be visible.
+         */
+        description: string;
+        /**
+         * Inlineable refactorings can have their actions hoisted out to the top level
+         * of a context menu. Non-inlineanable refactorings should always be shown inside
+         * their parent grouping.
+         *
+         * If not specified, this value is assumed to be 'true'
+         */
+        inlineable?: boolean;
+
+        actions: RefactorActionInfo[];
+    }
+
+    /**
+     * Represents a single refactoring action - for example, the "Extract Method..." refactor might
+     * offer several actions, each corresponding to a surround class or closure to extract into.
+     */
+    export type RefactorActionInfo = {
+        /**
+         * The programmatic name of the refactoring action
+         */
+        name: string;
+
+        /**
+         * A description of this refactoring action to show to the user.
+         * If the parent refactoring is inlined away, this will be the only text shown,
+         * so this description should make sense by itself if the parent is inlineable=true
+         */
+        description: string;
+    };
+
+    /**
+     * A set of edits to make in response to a refactor action, plus an optional
+     * location where renaming should be invoked from
+     */
+    export type RefactorEditInfo = {
+        edits: FileTextChanges[];
+        renameFilename?: string;
+        renameLocation?: number;
+    };
+
+
     export interface TextInsertion {
         newText: string;
         /** The position in newText the caret should point to after the insertion. */
         caretOffset: number;
     }
 
-    export interface RenameLocation {
+    export interface DocumentSpan {
         textSpan: TextSpan;
         fileName: string;
     }
 
-    export interface ReferenceEntry {
-        textSpan: TextSpan;
-        fileName: string;
+    export interface RenameLocation extends DocumentSpan {
+    }
+
+    export interface ReferenceEntry extends DocumentSpan {
         isWriteAccess: boolean;
         isDefinition: boolean;
+        isInString?: true;
     }
 
-    export interface ImplementationLocation {
-        textSpan: TextSpan;
-        fileName: string;
+    export interface ImplementationLocation extends DocumentSpan {
+        kind: ScriptElementKind;
+        displayParts: SymbolDisplayPart[];
     }
 
     export interface DocumentHighlights {
@@ -319,29 +442,30 @@ namespace ts {
         highlightSpans: HighlightSpan[];
     }
 
-    export namespace HighlightSpanKind {
-        export const none = "none";
-        export const definition = "definition";
-        export const reference = "reference";
-        export const writtenReference = "writtenReference";
+    export const enum HighlightSpanKind {
+        none = "none",
+        definition = "definition",
+        reference = "reference",
+        writtenReference = "writtenReference",
     }
 
     export interface HighlightSpan {
         fileName?: string;
+        isInString?: true;
         textSpan: TextSpan;
-        kind: string;
+        kind: HighlightSpanKind;
     }
 
     export interface NavigateToItem {
         name: string;
-        kind: string;
+        kind: ScriptElementKind;
         kindModifiers: string;
-        matchKind: string;
+        matchKind: string; // TODO: keyof typeof PatternMatchKind; (https://github.com/Microsoft/TypeScript/issues/15102)
         isCaseSensitive: boolean;
         fileName: string;
         textSpan: TextSpan;
         containerName: string;
-        containerKind: string;
+        containerKind: ScriptElementKind;
     }
 
     export enum IndentStyle {
@@ -362,11 +486,11 @@ namespace ts {
 
     export interface EditorSettings {
         baseIndentSize?: number;
-        indentSize: number;
-        tabSize: number;
-        newLineCharacter: string;
-        convertTabsToSpaces: boolean;
-        indentStyle: IndentStyle;
+        indentSize?: number;
+        tabSize?: number;
+        newLineCharacter?: string;
+        convertTabsToSpaces?: boolean;
+        indentStyle?: IndentStyle;
     }
 
     /* @deprecated - consider using FormatCodeSettings instead */
@@ -374,6 +498,7 @@ namespace ts {
         InsertSpaceAfterCommaDelimiter: boolean;
         InsertSpaceAfterSemicolonInForStatements: boolean;
         InsertSpaceBeforeAndAfterBinaryOperators: boolean;
+        InsertSpaceAfterConstructor?: boolean;
         InsertSpaceAfterKeywordsInControlFlowStatements: boolean;
         InsertSpaceAfterFunctionKeywordForAnonymousFunctions: boolean;
         InsertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis: boolean;
@@ -382,32 +507,35 @@ namespace ts {
         InsertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces: boolean;
         InsertSpaceAfterOpeningAndBeforeClosingJsxExpressionBraces?: boolean;
         InsertSpaceAfterTypeAssertion?: boolean;
+        InsertSpaceBeforeFunctionParenthesis?: boolean;
         PlaceOpenBraceOnNewLineForFunctions: boolean;
         PlaceOpenBraceOnNewLineForControlBlocks: boolean;
     }
 
     export interface FormatCodeSettings extends EditorSettings {
-        insertSpaceAfterCommaDelimiter: boolean;
-        insertSpaceAfterSemicolonInForStatements: boolean;
-        insertSpaceBeforeAndAfterBinaryOperators: boolean;
-        insertSpaceAfterKeywordsInControlFlowStatements: boolean;
-        insertSpaceAfterFunctionKeywordForAnonymousFunctions: boolean;
-        insertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis: boolean;
-        insertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets: boolean;
+        insertSpaceAfterCommaDelimiter?: boolean;
+        insertSpaceAfterSemicolonInForStatements?: boolean;
+        insertSpaceBeforeAndAfterBinaryOperators?: boolean;
+        insertSpaceAfterConstructor?: boolean;
+        insertSpaceAfterKeywordsInControlFlowStatements?: boolean;
+        insertSpaceAfterFunctionKeywordForAnonymousFunctions?: boolean;
+        insertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis?: boolean;
+        insertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets?: boolean;
         insertSpaceAfterOpeningAndBeforeClosingNonemptyBraces?: boolean;
-        insertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces: boolean;
-        insertSpaceAfterOpeningAndBeforeClosingJsxExpressionBraces: boolean;
+        insertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces?: boolean;
+        insertSpaceAfterOpeningAndBeforeClosingJsxExpressionBraces?: boolean;
         insertSpaceAfterTypeAssertion?: boolean;
-        placeOpenBraceOnNewLineForFunctions: boolean;
-        placeOpenBraceOnNewLineForControlBlocks: boolean;
+        insertSpaceBeforeFunctionParenthesis?: boolean;
+        placeOpenBraceOnNewLineForFunctions?: boolean;
+        placeOpenBraceOnNewLineForControlBlocks?: boolean;
     }
 
     export interface DefinitionInfo {
         fileName: string;
         textSpan: TextSpan;
-        kind: string;
+        kind: ScriptElementKind;
         name: string;
-        containerKind: string;
+        containerKind: ScriptElementKind;
         containerName: string;
     }
 
@@ -450,12 +578,18 @@ namespace ts {
         kind: string;
     }
 
+    export interface JSDocTagInfo {
+        name: string;
+        text?: string;
+    }
+
     export interface QuickInfo {
-        kind: string;
+        kind: ScriptElementKind;
         kindModifiers: string;
         textSpan: TextSpan;
         displayParts: SymbolDisplayPart[];
         documentation: SymbolDisplayPart[];
+        tags: JSDocTagInfo[];
     }
 
     export interface RenameInfo {
@@ -463,7 +597,7 @@ namespace ts {
         localizedErrorMessage: string;
         displayName: string;
         fullDisplayName: string;
-        kind: string;
+        kind: ScriptElementKind;
         kindModifiers: string;
         triggerSpan: TextSpan;
     }
@@ -489,6 +623,7 @@ namespace ts {
         separatorDisplayParts: SymbolDisplayPart[];
         parameters: SignatureHelpParameter[];
         documentation: SymbolDisplayPart[];
+        tags: JSDocTagInfo[];
     }
 
     /**
@@ -503,30 +638,36 @@ namespace ts {
     }
 
     export interface CompletionInfo {
+        isGlobalCompletion: boolean;
         isMemberCompletion: boolean;
-        isNewIdentifierLocation: boolean;  // true when the current location also allows for a new identifier
+
+        /**
+         * true when the current location also allows for a new identifier
+         */
+        isNewIdentifierLocation: boolean;
         entries: CompletionEntry[];
     }
 
     export interface CompletionEntry {
         name: string;
-        kind: string;            // see ScriptElementKind
+        kind: ScriptElementKind;
         kindModifiers: string;   // see ScriptElementKindModifier, comma separated
         sortText: string;
         /**
-          * An optional span that indicates the text to be replaced by this completion item. It will be
-          * set if the required span differs from the one generated by the default replacement behavior and should
-          * be used in that case
-          */
+         * An optional span that indicates the text to be replaced by this completion item. It will be
+         * set if the required span differs from the one generated by the default replacement behavior and should
+         * be used in that case
+         */
         replacementSpan?: TextSpan;
     }
 
     export interface CompletionEntryDetails {
         name: string;
-        kind: string;            // see ScriptElementKind
+        kind: ScriptElementKind;
         kindModifiers: string;   // see ScriptElementKindModifier, comma separated
         displayParts: SymbolDisplayPart[];
         documentation: SymbolDisplayPart[];
+        tags: JSDocTagInfo[];
     }
 
     export interface OutliningSpan {
@@ -540,9 +681,9 @@ namespace ts {
         bannerText: string;
 
         /**
-          * Whether or not this region should be automatically collapsed when
-          * the 'Collapse to Definitions' command is invoked.
-          */
+         * Whether or not this region should be automatically collapsed when
+         * the 'Collapse to Definitions' command is invoked.
+         */
         autoCollapse: boolean;
     }
 
@@ -620,137 +761,140 @@ namespace ts {
         getEncodedLexicalClassifications(text: string, endOfLineState: EndOfLineState, syntacticClassifierAbsent: boolean): Classifications;
     }
 
-    // TODO: move these to enums
-    export namespace ScriptElementKind {
-        export const unknown = "";
-        export const warning = "warning";
+    export const enum ScriptElementKind {
+        unknown = "",
+        warning = "warning",
 
         /** predefined type (void) or keyword (class) */
-        export const keyword = "keyword";
+        keyword = "keyword",
 
         /** top level script node */
-        export const scriptElement = "script";
+        scriptElement = "script",
 
         /** module foo {} */
-        export const moduleElement = "module";
+        moduleElement = "module",
 
         /** class X {} */
-        export const classElement = "class";
+        classElement = "class",
 
         /** var x = class X {} */
-        export const localClassElement = "local class";
+        localClassElement = "local class",
 
         /** interface Y {} */
-        export const interfaceElement = "interface";
+        interfaceElement = "interface",
 
         /** type T = ... */
-        export const typeElement = "type";
+        typeElement = "type",
 
         /** enum E */
-        export const enumElement = "enum";
-        // TODO: GH#9983
-        export const enumMemberElement = "const";
+        enumElement = "enum",
+        enumMemberElement = "enum member",
 
         /**
          * Inside module and script only
          * const v = ..
          */
-        export const variableElement = "var";
+        variableElement = "var",
 
         /** Inside function */
-        export const localVariableElement = "local var";
+        localVariableElement = "local var",
 
         /**
          * Inside module and script only
          * function f() { }
          */
-        export const functionElement = "function";
+        functionElement = "function",
 
         /** Inside function */
-        export const localFunctionElement = "local function";
+        localFunctionElement = "local function",
 
         /** class X { [public|private]* foo() {} } */
-        export const memberFunctionElement = "method";
+        memberFunctionElement = "method",
 
         /** class X { [public|private]* [get|set] foo:number; } */
-        export const memberGetAccessorElement = "getter";
-        export const memberSetAccessorElement = "setter";
+        memberGetAccessorElement = "getter",
+        memberSetAccessorElement = "setter",
 
         /**
          * class X { [public|private]* foo:number; }
          * interface Y { foo:number; }
          */
-        export const memberVariableElement = "property";
+        memberVariableElement = "property",
 
         /** class X { constructor() { } } */
-        export const constructorImplementationElement = "constructor";
+        constructorImplementationElement = "constructor",
 
         /** interface Y { ():number; } */
-        export const callSignatureElement = "call";
+        callSignatureElement = "call",
 
         /** interface Y { []:number; } */
-        export const indexSignatureElement = "index";
+        indexSignatureElement = "index",
 
         /** interface Y { new():Y; } */
-        export const constructSignatureElement = "construct";
+        constructSignatureElement = "construct",
 
         /** function foo(*Y*: string) */
-        export const parameterElement = "parameter";
-
-        export const typeParameterElement = "type parameter";
-
-        export const primitiveType = "primitive type";
+        parameterElement = "parameter",
 
-        export const label = "label";
+        typeParameterElement = "type parameter",
 
-        export const alias = "alias";
+        primitiveType = "primitive type",
 
-        export const constElement = "const";
+        label = "label",
 
-        export const letElement = "let";
+        alias = "alias",
 
-        export const directory = "directory";
+        constElement = "const",
 
-        export const externalModuleName = "external module name";
-    }
-
-    export namespace ScriptElementKindModifier {
-        export const none = "";
-        export const publicMemberModifier = "public";
-        export const privateMemberModifier = "private";
-        export const protectedMemberModifier = "protected";
-        export const exportedModifier = "export";
-        export const ambientModifier = "declare";
-        export const staticModifier = "static";
-        export const abstractModifier = "abstract";
-    }
+        letElement = "let",
 
-    export class ClassificationTypeNames {
-        public static comment = "comment";
-        public static identifier = "identifier";
-        public static keyword = "keyword";
-        public static numericLiteral = "number";
-        public static operator = "operator";
-        public static stringLiteral = "string";
-        public static whiteSpace = "whitespace";
-        public static text = "text";
+        directory = "directory",
 
-        public static punctuation = "punctuation";
+        externalModuleName = "external module name",
 
-        public static className = "class name";
-        public static enumName = "enum name";
-        public static interfaceName = "interface name";
-        public static moduleName = "module name";
-        public static typeParameterName = "type parameter name";
-        public static typeAliasName = "type alias name";
-        public static parameterName = "parameter name";
-        public static docCommentTagName = "doc comment tag name";
-        public static jsxOpenTagName = "jsx open tag name";
-        public static jsxCloseTagName = "jsx close tag name";
-        public static jsxSelfClosingTagName = "jsx self closing tag name";
-        public static jsxAttribute = "jsx attribute";
-        public static jsxText = "jsx text";
-        public static jsxAttributeStringLiteralValue = "jsx attribute string literal value";
+        /**
+         * <JsxTagName attribute1 attribute2={0} />
+         */
+        jsxAttribute = "JSX attribute",
+    }
+
+    export const enum ScriptElementKindModifier {
+        none = "",
+        publicMemberModifier = "public",
+        privateMemberModifier = "private",
+        protectedMemberModifier = "protected",
+        exportedModifier = "export",
+        ambientModifier = "declare",
+        staticModifier = "static",
+        abstractModifier = "abstract",
+    }
+
+    export const enum ClassificationTypeNames {
+        comment = "comment",
+        identifier = "identifier",
+        keyword = "keyword",
+        numericLiteral = "number",
+        operator = "operator",
+        stringLiteral = "string",
+        whiteSpace = "whitespace",
+        text = "text",
+
+        punctuation = "punctuation",
+
+        className = "class name",
+        enumName = "enum name",
+        interfaceName = "interface name",
+        moduleName = "module name",
+        typeParameterName = "type parameter name",
+        typeAliasName = "type alias name",
+        parameterName = "parameter name",
+        docCommentTagName = "doc comment tag name",
+        jsxOpenTagName = "jsx open tag name",
+        jsxCloseTagName = "jsx close tag name",
+        jsxSelfClosingTagName = "jsx self closing tag name",
+        jsxAttribute = "jsx attribute",
+        jsxText = "jsx text",
+        jsxAttributeStringLiteralValue = "jsx attribute string literal value",
     }
 
     export const enum ClassificationType {
diff --git a/src/services/utilities.ts b/src/services/utilities.ts
index 829048f..78c7140 100644
--- a/src/services/utilities.ts
+++ b/src/services/utilities.ts
@@ -21,7 +21,6 @@ namespace ts {
             case SyntaxKind.PropertySignature:
             case SyntaxKind.PropertyAssignment:
             case SyntaxKind.ShorthandPropertyAssignment:
-            case SyntaxKind.EnumMember:
             case SyntaxKind.MethodDeclaration:
             case SyntaxKind.MethodSignature:
             case SyntaxKind.Constructor:
@@ -31,6 +30,7 @@ namespace ts {
             case SyntaxKind.FunctionExpression:
             case SyntaxKind.ArrowFunction:
             case SyntaxKind.CatchClause:
+            case SyntaxKind.JsxAttribute:
                 return SemanticMeaning.Value;
 
             case SyntaxKind.TypeParameter:
@@ -39,8 +39,12 @@ namespace ts {
             case SyntaxKind.TypeLiteral:
                 return SemanticMeaning.Type;
 
+            case SyntaxKind.JSDocTypedefTag:
+                // If it has no name node, it shares the name with the value declaration below it.
+                return (node as JSDocTypedefTag).name === undefined ? SemanticMeaning.Value | SemanticMeaning.Type : SemanticMeaning.Type;
+
+            case SyntaxKind.EnumMember:
             case SyntaxKind.ClassDeclaration:
-            case SyntaxKind.EnumDeclaration:
                 return SemanticMeaning.Value | SemanticMeaning.Type;
 
             case SyntaxKind.ModuleDeclaration:
@@ -54,27 +58,31 @@ namespace ts {
                     return SemanticMeaning.Namespace;
                 }
 
+            case SyntaxKind.EnumDeclaration:
             case SyntaxKind.NamedImports:
             case SyntaxKind.ImportSpecifier:
             case SyntaxKind.ImportEqualsDeclaration:
             case SyntaxKind.ImportDeclaration:
             case SyntaxKind.ExportAssignment:
             case SyntaxKind.ExportDeclaration:
-                return SemanticMeaning.Value | SemanticMeaning.Type | SemanticMeaning.Namespace;
+                return SemanticMeaning.All;
 
             // An external module can be a Value
             case SyntaxKind.SourceFile:
                 return SemanticMeaning.Namespace | SemanticMeaning.Value;
         }
 
-        return SemanticMeaning.Value | SemanticMeaning.Type | SemanticMeaning.Namespace;
+        return SemanticMeaning.All;
     }
 
     export function getMeaningFromLocation(node: Node): SemanticMeaning {
-        if (node.parent.kind === SyntaxKind.ExportAssignment) {
-            return SemanticMeaning.Value | SemanticMeaning.Type | SemanticMeaning.Namespace;
+        if (node.kind === SyntaxKind.SourceFile) {
+            return SemanticMeaning.Value;
         }
-        else if (isInRightSideOfImport(node)) {
+        else if (node.parent.kind === SyntaxKind.ExportAssignment) {
+            return SemanticMeaning.All;
+        }
+        else if (isInRightSideOfInternalImportEqualsDeclaration(node)) {
             return getMeaningFromRightHandSideOfImportEquals(node);
         }
         else if (isDeclarationName(node)) {
@@ -86,6 +94,10 @@ namespace ts {
         else if (isNamespaceReference(node)) {
             return SemanticMeaning.Namespace;
         }
+        else if (isTypeParameterDeclaration(node.parent)) {
+            Debug.assert(isJSDocTemplateTag(node.parent.parent)); // Else would be handled by isDeclarationName
+            return SemanticMeaning.Type;
+        }
         else {
             return SemanticMeaning.Value;
         }
@@ -106,7 +118,7 @@ namespace ts {
         return SemanticMeaning.Namespace;
     }
 
-    function isInRightSideOfImport(node: Node) {
+    export function isInRightSideOfInternalImportEqualsDeclaration(node: Node) {
         while (node.parent.kind === SyntaxKind.QualifiedName) {
             node = node.parent;
         }
@@ -156,10 +168,22 @@ namespace ts {
             node = node.parent;
         }
 
-        return node.parent.kind === SyntaxKind.TypeReference ||
-            (node.parent.kind === SyntaxKind.ExpressionWithTypeArguments && !isExpressionWithTypeArgumentsInClassExtendsClause(<ExpressionWithTypeArguments>node.parent)) ||
-            (node.kind === SyntaxKind.ThisKeyword && !isPartOfExpression(node)) ||
-            node.kind === SyntaxKind.ThisType;
+        switch (node.kind) {
+            case SyntaxKind.ThisKeyword:
+                return !isPartOfExpression(node);
+            case SyntaxKind.ThisType:
+                return true;
+        }
+
+        switch (node.parent.kind) {
+            case SyntaxKind.TypeReference:
+            case SyntaxKind.JSDocTypeReference:
+                return true;
+            case SyntaxKind.ExpressionWithTypeArguments:
+                return !isExpressionWithTypeArgumentsInClassExtendsClause(<ExpressionWithTypeArguments>node.parent);
+        }
+
+        return false;
     }
 
     export function isCallExpressionTarget(node: Node): boolean {
@@ -234,7 +258,7 @@ namespace ts {
                 case SyntaxKind.GetAccessor:
                 case SyntaxKind.SetAccessor:
                 case SyntaxKind.ModuleDeclaration:
-                    return (<Declaration>node.parent).name === node;
+                    return getNameOfDeclaration(<Declaration>node.parent) === node;
                 case SyntaxKind.ElementAccessExpression:
                     return (<ElementAccessExpression>node.parent).argumentExpression === node;
                 case SyntaxKind.ComputedPropertyName:
@@ -250,37 +274,6 @@ namespace ts {
             getExternalModuleImportEqualsDeclarationExpression(node.parent.parent) === node;
     }
 
-    /** Returns true if the position is within a comment */
-    export function isInsideComment(sourceFile: SourceFile, token: Node, position: number): boolean {
-        // The position has to be: 1. in the leading trivia (before token.getStart()), and 2. within a comment
-        return position <= token.getStart(sourceFile) &&
-            (isInsideCommentRange(getTrailingCommentRanges(sourceFile.text, token.getFullStart())) ||
-                isInsideCommentRange(getLeadingCommentRanges(sourceFile.text, token.getFullStart())));
-
-        function isInsideCommentRange(comments: CommentRange[]): boolean {
-            return forEach(comments, comment => {
-                // either we are 1. completely inside the comment, or 2. at the end of the comment
-                if (comment.pos < position && position < comment.end) {
-                    return true;
-                }
-                else if (position === comment.end) {
-                    const text = sourceFile.text;
-                    const width = comment.end - comment.pos;
-                    // is single line comment or just /*
-                    if (width <= 2 || text.charCodeAt(comment.pos + 1) === CharacterCodes.slash) {
-                        return true;
-                    }
-                    else {
-                        // is unterminated multi-line comment
-                        return !(text.charCodeAt(comment.end - 1) === CharacterCodes.slash &&
-                            text.charCodeAt(comment.end - 2) === CharacterCodes.asterisk);
-                    }
-                }
-                return false;
-            });
-        }
-    }
-
     export function getContainerNode(node: Node): Declaration {
         while (true) {
             node = node.parent;
@@ -304,7 +297,7 @@ namespace ts {
         }
     }
 
-    export function getNodeKind(node: Node): string {
+    export function getNodeKind(node: Node): ScriptElementKind {
         switch (node.kind) {
             case SyntaxKind.SourceFile:
                 return isExternalModule(<SourceFile>node) ? ScriptElementKind.moduleElement : ScriptElementKind.scriptElement;
@@ -351,7 +344,7 @@ namespace ts {
                 return ScriptElementKind.unknown;
         }
 
-        function getKindOfVariableDeclaration(v: VariableDeclaration): string {
+        function getKindOfVariableDeclaration(v: VariableDeclaration): ScriptElementKind {
             return isConst(v)
                 ? ScriptElementKind.constElement
                 : isLet(v)
@@ -360,15 +353,6 @@ namespace ts {
         }
     }
 
-    export function getStringLiteralTypeForNode(node: StringLiteral | LiteralTypeNode, typeChecker: TypeChecker): LiteralType {
-        const searchNode = node.parent.kind === SyntaxKind.LiteralType ? <LiteralTypeNode>node.parent : node;
-        const type = typeChecker.getTypeAtLocation(searchNode);
-        if (type && type.flags & TypeFlags.StringLiteral) {
-            return <LiteralType>type;
-        }
-        return undefined;
-    }
-
     export function isThis(node: Node): boolean {
         switch (node.kind) {
             case SyntaxKind.ThisKeyword:
@@ -376,7 +360,7 @@ namespace ts {
                 return true;
             case SyntaxKind.Identifier:
                 // 'this' as a parameter
-                return (node as Identifier).originalKeywordKind === SyntaxKind.ThisKeyword && node.parent.kind === SyntaxKind.Parameter;
+                return identifierIsThisKeyword(node as Identifier) && node.parent.kind === SyntaxKind.Parameter;
             default:
                 return false;
         }
@@ -390,8 +374,8 @@ namespace ts {
         list: Node;
     }
 
-    export function getLineStartPositionForPosition(position: number, sourceFile: SourceFile): number {
-        const lineStarts = sourceFile.getLineStarts();
+    export function getLineStartPositionForPosition(position: number, sourceFile: SourceFileLike): number {
+        const lineStarts = getLineStarts(sourceFile);
         const line = sourceFile.getLineAndCharacterOfPosition(position).line;
         return lineStarts[line];
     }
@@ -446,7 +430,7 @@ namespace ts {
                 if (!(<NewExpression>n).arguments) {
                     return true;
                 }
-            // fall through
+            // falls through
             case SyntaxKind.CallExpression:
             case SyntaxKind.ParenthesizedExpression:
             case SyntaxKind.ParenthesizedType:
@@ -530,8 +514,8 @@ namespace ts {
             case SyntaxKind.DeleteExpression:
             case SyntaxKind.VoidExpression:
             case SyntaxKind.YieldExpression:
-            case SyntaxKind.SpreadElementExpression:
-                const unaryWordExpression = (<TypeOfExpression | DeleteExpression | VoidExpression | YieldExpression | SpreadElementExpression>n);
+            case SyntaxKind.SpreadElement:
+                const unaryWordExpression = n as (TypeOfExpression | DeleteExpression | VoidExpression | YieldExpression | SpreadElement);
                 return isCompletedNode(unaryWordExpression.expression, sourceFile);
 
             case SyntaxKind.TaggedTemplateExpression:
@@ -600,7 +584,7 @@ namespace ts {
         return !!findChildOfKind(n, kind, sourceFile);
     }
 
-    export function findChildOfKind(n: Node, kind: SyntaxKind, sourceFile?: SourceFile): Node {
+    export function findChildOfKind(n: Node, kind: SyntaxKind, sourceFile?: SourceFileLike): Node | undefined {
         return forEach(n.getChildren(sourceFile), c => c.kind === kind && c);
     }
 
@@ -624,29 +608,32 @@ namespace ts {
     /* Gets the token whose text has range [start, end) and
      * position >= start and (position < end or (position === end && token is keyword or identifier))
      */
-    export function getTouchingWord(sourceFile: SourceFile, position: number, includeJsDocComment = false): Node {
-        return getTouchingToken(sourceFile, position, n => isWord(n.kind), includeJsDocComment);
+    export function getTouchingWord(sourceFile: SourceFile, position: number, includeJsDocComment: boolean): Node {
+        return getTouchingToken(sourceFile, position, includeJsDocComment, n => isWord(n.kind));
     }
 
     /* Gets the token whose text has range [start, end) and position >= start
      * and (position < end or (position === end && token is keyword or identifier or numeric/string literal))
      */
-    export function getTouchingPropertyName(sourceFile: SourceFile, position: number, includeJsDocComment = false): Node {
-        return getTouchingToken(sourceFile, position, n => isPropertyName(n.kind), includeJsDocComment);
+    export function getTouchingPropertyName(sourceFile: SourceFile, position: number, includeJsDocComment: boolean): Node {
+        return getTouchingToken(sourceFile, position, includeJsDocComment, n => isPropertyName(n.kind));
     }
 
-    /** Returns the token if position is in [start, end) or if position === end and includeItemAtEndPosition(token) === true */
-    export function getTouchingToken(sourceFile: SourceFile, position: number, includeItemAtEndPosition?: (n: Node) => boolean, includeJsDocComment = false): Node {
-        return getTokenAtPositionWorker(sourceFile, position, /*allowPositionInLeadingTrivia*/ false, includeItemAtEndPosition, includeJsDocComment);
+    /**
+     * Returns the token if position is in [start, end).
+     * If position === end, returns the preceding token if includeItemAtEndPosition(previousToken) === true
+     */
+    export function getTouchingToken(sourceFile: SourceFile, position: number, includeJsDocComment: boolean, includePrecedingTokenAtEndPosition?: (n: Node) => boolean): Node {
+        return getTokenAtPositionWorker(sourceFile, position, /*allowPositionInLeadingTrivia*/ false, includePrecedingTokenAtEndPosition, /*includeEndPosition*/ false, includeJsDocComment);
     }
 
     /** Returns a token if position is in [start-of-leading-trivia, end) */
-    export function getTokenAtPosition(sourceFile: SourceFile, position: number, includeJsDocComment = false): Node {
-        return getTokenAtPositionWorker(sourceFile, position, /*allowPositionInLeadingTrivia*/ true, /*includeItemAtEndPosition*/ undefined, includeJsDocComment);
+    export function getTokenAtPosition(sourceFile: SourceFile, position: number, includeJsDocComment: boolean, includeEndPosition?: boolean): Node {
+        return getTokenAtPositionWorker(sourceFile, position, /*allowPositionInLeadingTrivia*/ true, /*includePrecedingTokenAtEndPosition*/ undefined, includeEndPosition, includeJsDocComment);
     }
 
     /** Get the token whose text contains the position */
-    function getTokenAtPositionWorker(sourceFile: SourceFile, position: number, allowPositionInLeadingTrivia: boolean, includeItemAtEndPosition: (n: Node) => boolean, includeJsDocComment = false): Node {
+    function getTokenAtPositionWorker(sourceFile: SourceFile, position: number, allowPositionInLeadingTrivia: boolean, includePrecedingTokenAtEndPosition: (n: Node) => boolean, includeEndPosition: boolean, includeJsDocComment: boolean): Node {
         let current: Node = sourceFile;
         outer: while (true) {
             if (isToken(current)) {
@@ -654,45 +641,26 @@ namespace ts {
                 return current;
             }
 
-            if (includeJsDocComment) {
-                const jsDocChildren = ts.filter(current.getChildren(), isJSDocNode);
-                for (const jsDocChild of jsDocChildren) {
-                    const start = allowPositionInLeadingTrivia ? jsDocChild.getFullStart() : jsDocChild.getStart(sourceFile, includeJsDocComment);
-                    if (start <= position) {
-                        const end = jsDocChild.getEnd();
-                        if (position < end || (position === end && jsDocChild.kind === SyntaxKind.EndOfFileToken)) {
-                            current = jsDocChild;
-                            continue outer;
-                        }
-                        else if (includeItemAtEndPosition && end === position) {
-                            const previousToken = findPrecedingToken(position, sourceFile, jsDocChild);
-                            if (previousToken && includeItemAtEndPosition(previousToken)) {
-                                return previousToken;
-                            }
-                        }
-                    }
-                }
-            }
-
             // find the child that contains 'position'
-            for (let i = 0, n = current.getChildCount(sourceFile); i < n; i++) {
-                const child = current.getChildAt(i);
-                // all jsDocComment nodes were already visited
-                if (isJSDocNode(child)) {
+            for (const child of current.getChildren()) {
+                if (!includeJsDocComment && isJSDocNode(child)) {
                     continue;
                 }
+
                 const start = allowPositionInLeadingTrivia ? child.getFullStart() : child.getStart(sourceFile, includeJsDocComment);
-                if (start <= position) {
-                    const end = child.getEnd();
-                    if (position < end || (position === end && child.kind === SyntaxKind.EndOfFileToken)) {
-                        current = child;
-                        continue outer;
-                    }
-                    else if (includeItemAtEndPosition && end === position) {
-                        const previousToken = findPrecedingToken(position, sourceFile, child);
-                        if (previousToken && includeItemAtEndPosition(previousToken)) {
-                            return previousToken;
-                        }
+                if (start > position) {
+                    continue;
+                }
+
+                const end = child.getEnd();
+                if (position < end || (position === end && (child.kind === SyntaxKind.EndOfFileToken || includeEndPosition))) {
+                    current = child;
+                    continue outer;
+                }
+                else if (includePrecedingTokenAtEndPosition && end === position) {
+                    const previousToken = findPrecedingToken(position, sourceFile, child);
+                    if (previousToken && includePrecedingTokenAtEndPosition(previousToken)) {
+                        return previousToken;
                     }
                 }
             }
@@ -702,17 +670,17 @@ namespace ts {
     }
 
     /**
-      * The token on the left of the position is the token that strictly includes the position
-      * or sits to the left of the cursor if it is on a boundary. For example
-      *
-      *   fo|o               -> will return foo
-      *   foo <comment> |bar -> will return foo
-      *
-      */
+     * The token on the left of the position is the token that strictly includes the position
+     * or sits to the left of the cursor if it is on a boundary. For example
+     *
+     *   fo|o               -> will return foo
+     *   foo <comment> |bar -> will return foo
+     *
+     */
     export function findTokenOnLeftOfPosition(file: SourceFile, position: number): Node {
         // Ideally, getTokenAtPosition should return a token. However, it is currently
         // broken, so we do a check to make sure the result was indeed a token.
-        const tokenAtPosition = getTokenAtPosition(file, position);
+        const tokenAtPosition = getTokenAtPosition(file, position, /*includeJsDocComment*/ false);
         if (isToken(tokenAtPosition) && position > tokenAtPosition.getStart(file) && position < tokenAtPosition.getEnd()) {
             return tokenAtPosition;
         }
@@ -746,11 +714,11 @@ namespace ts {
         }
     }
 
-    export function findPrecedingToken(position: number, sourceFile: SourceFile, startNode?: Node): Node {
+    export function findPrecedingToken(position: number, sourceFile: SourceFile, startNode?: Node, includeJsDoc?: boolean): Node {
         return find(startNode || sourceFile);
 
         function findRightmostToken(n: Node): Node {
-            if (isToken(n) || n.kind === SyntaxKind.JsxText) {
+            if (isToken(n)) {
                 return n;
             }
 
@@ -761,12 +729,12 @@ namespace ts {
         }
 
         function find(n: Node): Node {
-            if (isToken(n) || n.kind === SyntaxKind.JsxText) {
+            if (isToken(n)) {
                 return n;
             }
 
             const children = n.getChildren();
-            for (let i = 0, len = children.length; i < len; i++) {
+            for (let i = 0; i < children.length; i++) {
                 const child = children[i];
                 // condition 'position < child.end' checks if child node end after the position
                 // in the example below this condition will be false for 'aaaa' and 'bbbb' and true for 'ccc'
@@ -777,7 +745,7 @@ namespace ts {
                 // NOTE: JsxText is a weird kind of node that can contain only whitespaces (since they are not counted as trivia).
                 // if this is the case - then we should assume that token in question is located in previous child.
                 if (position < child.end && (nodeHasTokens(child) || child.kind === SyntaxKind.JsxText)) {
-                    const start = child.getStart(sourceFile);
+                    const start = child.getStart(sourceFile, includeJsDoc);
                     const lookInPreviousChild =
                         (start >= position) || // cursor in the leading trivia
                         (child.kind === SyntaxKind.JsxText && start === child.end); // whitespace only JsxText
@@ -794,7 +762,7 @@ namespace ts {
                 }
             }
 
-            Debug.assert(startNode !== undefined || n.kind === SyntaxKind.SourceFile);
+            Debug.assert(startNode !== undefined || n.kind === SyntaxKind.SourceFile || isJSDocCommentContainingNode(n));
 
             // Here we know that none of child token nodes embrace the position,
             // the only known case is when position is at the end of the file.
@@ -838,15 +806,11 @@ namespace ts {
         return false;
     }
 
-    export function isInComment(sourceFile: SourceFile, position: number) {
-        return isInCommentHelper(sourceFile, position, /*predicate*/ undefined);
-    }
-
     /**
      * returns true if the position is in between the open and close elements of an JSX expression.
      */
     export function isInsideJsxElementOrAttribute(sourceFile: SourceFile, position: number) {
-        const token = getTokenAtPosition(sourceFile, position);
+        const token = getTokenAtPosition(sourceFile, position, /*includeJsDocComment*/ false);
 
         if (!token) {
             return false;
@@ -882,20 +846,35 @@ namespace ts {
     }
 
     export function isInTemplateString(sourceFile: SourceFile, position: number) {
-        const token = getTokenAtPosition(sourceFile, position);
+        const token = getTokenAtPosition(sourceFile, position, /*includeJsDocComment*/ false);
         return isTemplateLiteralKind(token.kind) && position > token.getStart(sourceFile);
     }
 
     /**
-     * Returns true if the cursor at position in sourceFile is within a comment that additionally
-     * satisfies predicate, and false otherwise.
+     * Returns true if the cursor at position in sourceFile is within a comment.
+     *
+     * @param tokenAtPosition Must equal `getTokenAtPosition(sourceFile, position)
+     * @param predicate Additional predicate to test on the comment range.
      */
-    export function isInCommentHelper(sourceFile: SourceFile, position: number, predicate?: (c: CommentRange) => boolean): boolean {
-        const token = getTokenAtPosition(sourceFile, position);
-
-        if (token && position <= token.getStart(sourceFile)) {
-            const commentRanges = getLeadingCommentRanges(sourceFile.text, token.pos);
+    export function isInComment(
+            sourceFile: SourceFile,
+            position: number,
+            tokenAtPosition = getTokenAtPosition(sourceFile, position, /*includeJsDocComment*/ false),
+            predicate?: (c: CommentRange) => boolean): boolean {
+        return position <= tokenAtPosition.getStart(sourceFile) &&
+            (isInCommentRange(getLeadingCommentRanges(sourceFile.text, tokenAtPosition.pos)) ||
+                isInCommentRange(getTrailingCommentRanges(sourceFile.text, tokenAtPosition.pos)));
+
+        function isInCommentRange(commentRanges: CommentRange[]): boolean {
+            return forEach(commentRanges, c => isPositionInCommentRange(c, position, sourceFile.text) && (!predicate || predicate(c)));
+        }
+    }
 
+    function isPositionInCommentRange({ pos, end, kind }: ts.CommentRange, position: number, text: string): boolean {
+        if (pos < position && position < end) {
+            return true;
+        }
+        else if (position === end) {
             // The end marker of a single-line comment does not include the newline character.
             // In the following case, we are inside a comment (^ denotes the cursor position):
             //
@@ -906,19 +885,17 @@ namespace ts {
             //    /* asdf */^
             //
             // Internally, we represent the end of the comment at the newline and closing '/', respectively.
-            return predicate ?
-                forEach(commentRanges, c => c.pos < position &&
-                    (c.kind == SyntaxKind.SingleLineCommentTrivia ? position <= c.end : position < c.end) &&
-                    predicate(c)) :
-                forEach(commentRanges, c => c.pos < position &&
-                    (c.kind == SyntaxKind.SingleLineCommentTrivia ? position <= c.end : position < c.end));
+            return kind === SyntaxKind.SingleLineCommentTrivia ||
+                // true for unterminated multi-line comment
+                !(text.charCodeAt(end - 1) === CharacterCodes.slash && text.charCodeAt(end - 2) === CharacterCodes.asterisk);
+        }
+        else {
+            return false;
         }
-
-        return false;
     }
 
     export function hasDocComment(sourceFile: SourceFile, position: number) {
-        const token = getTokenAtPosition(sourceFile, position);
+        const token = getTokenAtPosition(sourceFile, position, /*includeJsDocComment*/ false);
 
         // First, we have to see if this position actually landed in a comment.
         const commentRanges = getLeadingCommentRanges(sourceFile.text, token.pos);
@@ -931,42 +908,6 @@ namespace ts {
         }
     }
 
-    /**
-     * Get the corresponding JSDocTag node if the position is in a jsDoc comment
-     */
-    export function getJsDocTagAtPosition(sourceFile: SourceFile, position: number): JSDocTag {
-        let node = ts.getTokenAtPosition(sourceFile, position);
-        if (isToken(node)) {
-            switch (node.kind) {
-                case SyntaxKind.VarKeyword:
-                case SyntaxKind.LetKeyword:
-                case SyntaxKind.ConstKeyword:
-                    // if the current token is var, let or const, skip the VariableDeclarationList
-                    node = node.parent === undefined ? undefined : node.parent.parent;
-                    break;
-                default:
-                    node = node.parent;
-                    break;
-            }
-        }
-
-        if (node) {
-            if (node.jsDocComments) {
-                for (const jsDocComment of node.jsDocComments) {
-                    if (jsDocComment.tags) {
-                        for (const tag of jsDocComment.tags) {
-                            if (tag.pos <= position && position <= tag.end) {
-                                return tag;
-                            }
-                        }
-                    }
-                }
-            }
-        }
-
-        return undefined;
-    }
-
     function nodeHasTokens(n: Node): boolean {
         // If we have a token or node that has a non-zero width, it must have tokens.
         // Note, that getWidth() does not take trivia into account.
@@ -1000,10 +941,6 @@ namespace ts {
         return undefined;
     }
 
-    export function isToken(n: Node): boolean {
-        return n.kind >= SyntaxKind.FirstToken && n.kind <= SyntaxKind.LastToken;
-    }
-
     export function isWord(kind: SyntaxKind): boolean {
         return kind === SyntaxKind.Identifier || isKeyword(kind);
     }
@@ -1045,7 +982,17 @@ namespace ts {
         return false;
     }
 
+    export function cloneCompilerOptions(options: CompilerOptions): CompilerOptions {
+        const result = clone(options);
+        setConfigFileInOptions(result, options && options.configFile);
+        return result;
+    }
+
     export function compareDataObjects(dst: any, src: any): boolean {
+        if (!dst || !src || Object.keys(dst).length !== Object.keys(src).length) {
+            return false;
+        }
+
         for (const e in dst) {
             if (typeof dst[e] === "object") {
                 if (!compareDataObjects(dst[e], src[e])) {
@@ -1097,22 +1044,57 @@ namespace ts {
     }
 
     export function isInReferenceComment(sourceFile: SourceFile, position: number): boolean {
-        return isInCommentHelper(sourceFile, position, isReferenceComment);
-
-        function isReferenceComment(c: CommentRange): boolean {
+        return isInComment(sourceFile, position, /*tokenAtPosition*/ undefined, c => {
             const commentText = sourceFile.text.substring(c.pos, c.end);
             return tripleSlashDirectivePrefixRegex.test(commentText);
-        }
+        });
     }
 
     export function isInNonReferenceComment(sourceFile: SourceFile, position: number): boolean {
-        return isInCommentHelper(sourceFile, position, isNonReferenceComment);
-
-        function isNonReferenceComment(c: CommentRange): boolean {
+        return isInComment(sourceFile, position, /*tokenAtPosition*/ undefined, c => {
             const commentText = sourceFile.text.substring(c.pos, c.end);
             return !tripleSlashDirectivePrefixRegex.test(commentText);
+        });
+    }
+
+    export function createTextSpanFromNode(node: Node, sourceFile?: SourceFile): TextSpan {
+        return createTextSpanFromBounds(node.getStart(sourceFile), node.getEnd());
+    }
+
+    export function createTextSpanFromRange(range: TextRange): TextSpan {
+        return createTextSpanFromBounds(range.pos, range.end);
+    }
+
+    export function isTypeKeyword(kind: SyntaxKind): boolean {
+        switch (kind) {
+            case SyntaxKind.AnyKeyword:
+            case SyntaxKind.BooleanKeyword:
+            case SyntaxKind.NeverKeyword:
+            case SyntaxKind.NumberKeyword:
+            case SyntaxKind.ObjectKeyword:
+            case SyntaxKind.StringKeyword:
+            case SyntaxKind.SymbolKeyword:
+            case SyntaxKind.VoidKeyword:
+                return true;
+            default:
+                return false;
         }
     }
+
+    /** True if the symbol is for an external module, as opposed to a namespace. */
+    export function isExternalModuleSymbol(moduleSymbol: Symbol): boolean {
+        Debug.assert(!!(moduleSymbol.flags & SymbolFlags.Module));
+        return moduleSymbol.name.charCodeAt(0) === CharacterCodes.doubleQuote;
+    }
+
+    /** Returns `true` the first time it encounters a node and `false` afterwards. */
+    export function nodeSeenTracker<T extends Node>(): (node: T) => boolean {
+        const seen: Array<true> = [];
+        return node => {
+            const id = getNodeId(node);
+            return !seen[id] && (seen[id] = true);
+        };
+    }
 }
 
 // Display-part writer helpers
@@ -1137,13 +1119,15 @@ namespace ts {
             writeSpace: text => writeKind(text, SymbolDisplayPartKind.space),
             writeStringLiteral: text => writeKind(text, SymbolDisplayPartKind.stringLiteral),
             writeParameter: text => writeKind(text, SymbolDisplayPartKind.parameterName),
+            writeProperty: text => writeKind(text, SymbolDisplayPartKind.propertyName),
             writeSymbol,
             writeLine,
             increaseIndent: () => { indent++; },
             decreaseIndent: () => { indent--; },
             clear: resetWriter,
-            trackSymbol: () => { },
-            reportInaccessibleThisError: () => { }
+            trackSymbol: noop,
+            reportInaccessibleThisError: noop,
+            reportPrivateInBaseOfClassExpression: noop,
         };
 
         function writeIndent() {
@@ -1179,7 +1163,7 @@ namespace ts {
     }
 
     export function symbolPart(text: string, symbol: Symbol) {
-        return displayPart(text, displayPartKind(symbol), symbol);
+        return displayPart(text, displayPartKind(symbol));
 
         function displayPartKind(symbol: Symbol): SymbolDisplayPartKind {
             const flags = symbol.flags;
@@ -1205,7 +1189,7 @@ namespace ts {
         }
     }
 
-    export function displayPart(text: string, kind: SymbolDisplayPartKind, symbol?: Symbol): SymbolDisplayPart {
+    export function displayPart(text: string, kind: SymbolDisplayPartKind): SymbolDisplayPart {
         return <SymbolDisplayPart>{
             text: text,
             kind: SymbolDisplayPartKind[kind]
@@ -1279,24 +1263,17 @@ namespace ts {
     export function getDeclaredName(typeChecker: TypeChecker, symbol: Symbol, location: Node): string {
         // If this is an export or import specifier it could have been renamed using the 'as' syntax.
         // If so we want to search for whatever is under the cursor.
-        if (isImportOrExportSpecifierName(location)) {
-            return location.getText();
-        }
-        else if (isStringOrNumericLiteral(location.kind) &&
-            location.parent.kind === SyntaxKind.ComputedPropertyName) {
-            return (<LiteralExpression>location).text;
+        if (isImportOrExportSpecifierName(location) || isStringOrNumericLiteral(location) && location.parent.kind === SyntaxKind.ComputedPropertyName) {
+            return location.text;
         }
 
         // Try to get the local symbol if we're dealing with an 'export default'
         // since that symbol has the "true" name.
         const localExportDefaultSymbol = getLocalSymbolForExportDefault(symbol);
-
-        const name = typeChecker.symbolToString(localExportDefaultSymbol || symbol);
-
-        return name;
+        return typeChecker.symbolToString(localExportDefaultSymbol || symbol);
     }
 
-    export function isImportOrExportSpecifierName(location: Node): boolean {
+    export function isImportOrExportSpecifierName(location: Node): location is Identifier {
         return location.parent &&
             (location.parent.kind === SyntaxKind.ImportSpecifier || location.parent.kind === SyntaxKind.ExportSpecifier) &&
             (<ImportOrExportSpecifier>location.parent).propertyName === location;
@@ -1313,7 +1290,7 @@ namespace ts {
             name.charCodeAt(0) === name.charCodeAt(length - 1) &&
             (name.charCodeAt(0) === CharacterCodes.doubleQuote || name.charCodeAt(0) === CharacterCodes.singleQuote)) {
             return name.substring(1, length - 1);
-        };
+        }
         return name;
     }
 
@@ -1335,27 +1312,19 @@ namespace ts {
         return ensureScriptKind(fileName, scriptKind);
     }
 
-    export function sanitizeConfigFile(configFileName: string, content: string) {
-        const options: TranspileOptions = {
-            fileName: "config.js",
-            compilerOptions: {
-                target: ScriptTarget.ES6,
-                removeComments: true
-            },
-            reportDiagnostics: true
-        };
-        const { outputText, diagnostics } = ts.transpileModule("(" + content + ")", options);
-        // Becasue the content was wrapped in "()", the start position of diagnostics needs to be subtract by 1
-        // also, the emitted result will have "(" in the beginning and ");" in the end. We need to strip these
-        // as well
-        const trimmedOutput = outputText.trim();
-        for (const diagnostic of diagnostics) {
-            diagnostic.start = diagnostic.start - 1;
-        }
-        const {config, error} = parseConfigFileTextToJson(configFileName, trimmedOutput.substring(1, trimmedOutput.length - 2), /*stripComments*/ false);
-        return {
-            configJsonObject: config || {},
-            diagnostics: error ? concatenate(diagnostics, [error]) : diagnostics
-        };
+    export function getFirstNonSpaceCharacterPosition(text: string, position: number) {
+        while (isWhiteSpaceLike(text.charCodeAt(position))) {
+            position += 1;
+        }
+        return position;
+    }
+
+    export function getOpenBrace(constructor: ConstructorDeclaration, sourceFile: SourceFile) {
+        // First token is the open curly, this is where we want to put the 'super' call.
+        return constructor.body.getFirstToken(sourceFile);
+    }
+
+    export function getOpenBraceOfClassLike(declaration: ClassLikeDeclaration, sourceFile: SourceFile) {
+        return getTokenAtPosition(sourceFile, declaration.members.pos - 1, /*includeJsDocComment*/ false);
     }
 }